fs/smb/server/smb2pdu.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *   Copyright (C) 2016 Namjae Jeon <linkinjeon@kernel.org>
   4  *   Copyright (C) 2018 Samsung Electronics Co., Ltd.
   5  */
   6
   7 #include <linux/inetdevice.h>
   8 #include <net/addrconf.h>
   9 #include <linux/syscalls.h>
  10 #include <linux/namei.h>
  11 #include <linux/statfs.h>
  12 #include <linux/ethtool.h>
  13 #include <linux/falloc.h>
  14 #include <linux/mount.h>
  15 #include <linux/filelock.h>
  16
  17 #include "glob.h"
  18 #include "smbfsctl.h"
  19 #include "oplock.h"
  20 #include "smbacl.h"
  21
  22 #include "auth.h"
  23 #include "asn1.h"
  24 #include "connection.h"
  25 #include "transport_ipc.h"
  26 #include "transport_rdma.h"
  27 #include "vfs.h"
  28 #include "vfs_cache.h"
  29 #include "misc.h"
  30
  31 #include "server.h"
  32 #include "smb_common.h"
  33 #include "smbstatus.h"
  34 #include "ksmbd_work.h"
  35 #include "mgmt/user_config.h"
  36 #include "mgmt/share_config.h"
  37 #include "mgmt/tree_connect.h"
  38 #include "mgmt/user_session.h"
  39 #include "mgmt/ksmbd_ida.h"
  40 #include "ndr.h"
  41
  42 static void __wbuf(struct ksmbd_work *work, void **req, void **rsp)
  43 {
  44         if (work->next_smb2_rcv_hdr_off) {
  45                 *req = ksmbd_req_buf_next(work);
  46                 *rsp = ksmbd_resp_buf_next(work);
  47         } else {
  48                 *req = smb2_get_msg(work->request_buf);
  49                 *rsp = smb2_get_msg(work->response_buf);
  50         }
  51 }
  52
  53 #define WORK_BUFFERS(w, rq, rs) __wbuf((w), (void **)&(rq), (void **)&(rs))
  54
  55 /**
  56  * check_session_id() - check for valid session id in smb header
  57  * @conn:       connection instance
  58  * @id:         session id from smb header
  59  *
  60  * Return:      1 if valid session id, otherwise 0
  61  */
  62 static inline bool check_session_id(struct ksmbd_conn *conn, u64 id)
  63 {
  64         struct ksmbd_session *sess;
  65
  66         if (id == 0 || id == -1)
  67                 return false;
  68
  69         sess = ksmbd_session_lookup_all(conn, id);
  70         if (sess)
  71                 return true;
  72         pr_err("Invalid user session id: %llu\n", id);
  73         return false;
  74 }
  75
  76 struct channel *lookup_chann_list(struct ksmbd_session *sess, struct ksmbd_conn *conn)
  77 {
  78         return xa_load(&sess->ksmbd_chann_list, (long)conn);
  79 }
  80
  81 /**
  82  * smb2_get_ksmbd_tcon() - get tree connection information using a tree id.
  83  * @work:       smb work
  84  *
  85  * Return:      0 if there is a tree connection matched or these are
  86  *              skipable commands, otherwise error
  87  */
  88 int smb2_get_ksmbd_tcon(struct ksmbd_work *work)
  89 {
  90         struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work);
  91         unsigned int cmd = le16_to_cpu(req_hdr->Command);
  92         unsigned int tree_id;
  93
  94         if (cmd == SMB2_TREE_CONNECT_HE ||
  95             cmd ==  SMB2_CANCEL_HE ||
  96             cmd ==  SMB2_LOGOFF_HE) {
  97                 ksmbd_debug(SMB, "skip to check tree connect request\n");
  98                 return 0;
  99         }
 100
 101         if (xa_empty(&work->sess->tree_conns)) {
 102                 ksmbd_debug(SMB, "NO tree connected\n");
 103                 return -ENOENT;
 104         }
 105
 106         tree_id = le32_to_cpu(req_hdr->Id.SyncId.TreeId);
 107
 108         /*
 109          * If request is not the first in Compound request,
 110          * Just validate tree id in header with work->tcon->id.
 111          */
 112         if (work->next_smb2_rcv_hdr_off) {
 113                 if (!work->tcon) {
 114                         pr_err("The first operation in the compound does not have tcon\n");
 115                         return -EINVAL;
 116                 }
 117                 if (tree_id != UINT_MAX && work->tcon->id != tree_id) {
 118                         pr_err("tree id(%u) is different with id(%u) in first operation\n",
 119                                         tree_id, work->tcon->id);
 120                         return -EINVAL;
 121                 }
 122                 return 1;
 123         }
 124
 125         work->tcon = ksmbd_tree_conn_lookup(work->sess, tree_id);
 126         if (!work->tcon) {
 127                 pr_err("Invalid tid %d\n", tree_id);
 128                 return -ENOENT;
 129         }
 130
 131         return 1;
 132 }
 133
 134 /**
 135  * smb2_set_err_rsp() - set error response code on smb response
 136  * @work:       smb work containing response buffer
 137  */
 138 void smb2_set_err_rsp(struct ksmbd_work *work)
 139 {
 140         struct smb2_err_rsp *err_rsp;
 141
 142         if (work->next_smb2_rcv_hdr_off)
 143                 err_rsp = ksmbd_resp_buf_next(work);
 144         else
 145                 err_rsp = smb2_get_msg(work->response_buf);
 146
 147         if (err_rsp->hdr.Status != STATUS_STOPPED_ON_SYMLINK) {
 148                 int err;
 149
 150                 err_rsp->StructureSize = SMB2_ERROR_STRUCTURE_SIZE2_LE;
 151                 err_rsp->ErrorContextCount = 0;
 152                 err_rsp->Reserved = 0;
 153                 err_rsp->ByteCount = 0;
 154                 err_rsp->ErrorData[0] = 0;
 155                 err = ksmbd_iov_pin_rsp(work, (void *)err_rsp,
 156                                         __SMB2_HEADER_STRUCTURE_SIZE +
 157                                                 SMB2_ERROR_STRUCTURE_SIZE2);
 158                 if (err)
 159                         work->send_no_response = 1;
 160         }
 161 }
 162
 163 /**
 164  * is_smb2_neg_cmd() - is it smb2 negotiation command
 165  * @work:       smb work containing smb header
 166  *
 167  * Return:      true if smb2 negotiation command, otherwise false
 168  */
 169 bool is_smb2_neg_cmd(struct ksmbd_work *work)
 170 {
 171         struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
 172
 173         /* is it SMB2 header ? */
 174         if (hdr->ProtocolId != SMB2_PROTO_NUMBER)
 175                 return false;
 176
 177         /* make sure it is request not response message */
 178         if (hdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR)
 179                 return false;
 180
 181         if (hdr->Command != SMB2_NEGOTIATE)
 182                 return false;
 183
 184         return true;
 185 }
 186
 187 /**
 188  * is_smb2_rsp() - is it smb2 response
 189  * @work:       smb work containing smb response buffer
 190  *
 191  * Return:      true if smb2 response, otherwise false
 192  */
 193 bool is_smb2_rsp(struct ksmbd_work *work)
 194 {
 195         struct smb2_hdr *hdr = smb2_get_msg(work->response_buf);
 196
 197         /* is it SMB2 header ? */
 198         if (hdr->ProtocolId != SMB2_PROTO_NUMBER)
 199                 return false;
 200
 201         /* make sure it is response not request message */
 202         if (!(hdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR))
 203                 return false;
 204
 205         return true;
 206 }
 207
 208 /**
 209  * get_smb2_cmd_val() - get smb command code from smb header
 210  * @work:       smb work containing smb request buffer
 211  *
 212  * Return:      smb2 request command value
 213  */
 214 u16 get_smb2_cmd_val(struct ksmbd_work *work)
 215 {
 216         struct smb2_hdr *rcv_hdr;
 217
 218         if (work->next_smb2_rcv_hdr_off)
 219                 rcv_hdr = ksmbd_req_buf_next(work);
 220         else
 221                 rcv_hdr = smb2_get_msg(work->request_buf);
 222         return le16_to_cpu(rcv_hdr->Command);
 223 }
 224
 225 /**
 226  * set_smb2_rsp_status() - set error response code on smb2 header
 227  * @work:       smb work containing response buffer
 228  * @err:        error response code
 229  */
 230 void set_smb2_rsp_status(struct ksmbd_work *work, __le32 err)
 231 {
 232         struct smb2_hdr *rsp_hdr;
 233
 234         rsp_hdr = smb2_get_msg(work->response_buf);
 235         rsp_hdr->Status = err;
 236
 237         work->iov_idx = 0;
 238         work->iov_cnt = 0;
 239         work->next_smb2_rcv_hdr_off = 0;
 240         smb2_set_err_rsp(work);
 241 }
 242
 243 /**
 244  * init_smb2_neg_rsp() - initialize smb2 response for negotiate command
 245  * @work:       smb work containing smb request buffer
 246  *
 247  * smb2 negotiate response is sent in reply of smb1 negotiate command for
 248  * dialect auto-negotiation.
 249  */
 250 int init_smb2_neg_rsp(struct ksmbd_work *work)
 251 {
 252         struct smb2_hdr *rsp_hdr;
 253         struct smb2_negotiate_rsp *rsp;
 254         struct ksmbd_conn *conn = work->conn;
 255         int err;
 256
 257         rsp_hdr = smb2_get_msg(work->response_buf);
 258         memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);
 259         rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER;
 260         rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;
 261         rsp_hdr->CreditRequest = cpu_to_le16(2);
 262         rsp_hdr->Command = SMB2_NEGOTIATE;
 263         rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR);
 264         rsp_hdr->NextCommand = 0;
 265         rsp_hdr->MessageId = 0;
 266         rsp_hdr->Id.SyncId.ProcessId = 0;
 267         rsp_hdr->Id.SyncId.TreeId = 0;
 268         rsp_hdr->SessionId = 0;
 269         memset(rsp_hdr->Signature, 0, 16);
 270
 271         rsp = smb2_get_msg(work->response_buf);
 272
 273         WARN_ON(ksmbd_conn_good(conn));
 274
 275         rsp->StructureSize = cpu_to_le16(65);
 276         ksmbd_debug(SMB, "conn->dialect 0x%x\n", conn->dialect);
 277         rsp->DialectRevision = cpu_to_le16(conn->dialect);
 278         /* Not setting conn guid rsp->ServerGUID, as it
 279          * not used by client for identifying connection
 280          */
 281         rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
 282         /* Default Max Message Size till SMB2.0, 64K*/
 283         rsp->MaxTransactSize = cpu_to_le32(conn->vals->max_trans_size);
 284         rsp->MaxReadSize = cpu_to_le32(conn->vals->max_read_size);
 285         rsp->MaxWriteSize = cpu_to_le32(conn->vals->max_write_size);
 286
 287         rsp->SystemTime = cpu_to_le64(ksmbd_systime());
 288         rsp->ServerStartTime = 0;
 289
 290         rsp->SecurityBufferOffset = cpu_to_le16(128);
 291         rsp->SecurityBufferLength = cpu_to_le16(AUTH_GSS_LENGTH);
 292         ksmbd_copy_gss_neg_header((char *)(&rsp->hdr) +
 293                 le16_to_cpu(rsp->SecurityBufferOffset));
 294         rsp->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED_LE;
 295         if (server_conf.signing == KSMBD_CONFIG_OPT_MANDATORY)
 296                 rsp->SecurityMode |= SMB2_NEGOTIATE_SIGNING_REQUIRED_LE;
 297         err = ksmbd_iov_pin_rsp(work, rsp,
 298                                 sizeof(struct smb2_negotiate_rsp) + AUTH_GSS_LENGTH);
 299         if (err)
 300                 return err;
 301         conn->use_spnego = true;
 302
 303         ksmbd_conn_set_need_negotiate(conn);
 304         return 0;
 305 }
 306
 307 /**
 308  * smb2_set_rsp_credits() - set number of credits in response buffer
 309  * @work:       smb work containing smb response buffer
 310  */
 311 int smb2_set_rsp_credits(struct ksmbd_work *work)
 312 {
 313         struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work);
 314         struct smb2_hdr *hdr = ksmbd_resp_buf_next(work);
 315         struct ksmbd_conn *conn = work->conn;
 316         unsigned short credits_requested, aux_max;
 317         unsigned short credit_charge, credits_granted = 0;
 318
 319         if (work->send_no_response)
 320                 return 0;
 321
 322         hdr->CreditCharge = req_hdr->CreditCharge;
 323
 324         if (conn->total_credits > conn->vals->max_credits) {
 325                 hdr->CreditRequest = 0;
 326                 pr_err("Total credits overflow: %d\n", conn->total_credits);
 327                 return -EINVAL;
 328         }
 329
 330         credit_charge = max_t(unsigned short,
 331                               le16_to_cpu(req_hdr->CreditCharge), 1);
 332         if (credit_charge > conn->total_credits) {
 333                 ksmbd_debug(SMB, "Insufficient credits granted, given: %u, granted: %u\n",
 334                             credit_charge, conn->total_credits);
 335                 return -EINVAL;
 336         }
 337
 338         conn->total_credits -= credit_charge;
 339         conn->outstanding_credits -= credit_charge;
 340         credits_requested = max_t(unsigned short,
 341                                   le16_to_cpu(req_hdr->CreditRequest), 1);
 342
 343         /* according to smb2.credits smbtorture, Windows server
 344          * 2016 or later grant up to 8192 credits at once.
 345          *
 346          * TODO: Need to adjuct CreditRequest value according to
 347          * current cpu load
 348          */
 349         if (hdr->Command == SMB2_NEGOTIATE)
 350                 aux_max = 1;
 351         else
 352                 aux_max = conn->vals->max_credits - conn->total_credits;
 353         credits_granted = min_t(unsigned short, credits_requested, aux_max);
 354
 355         conn->total_credits += credits_granted;
 356         work->credits_granted += credits_granted;
 357
 358         if (!req_hdr->NextCommand) {
 359                 /* Update CreditRequest in last request */
 360                 hdr->CreditRequest = cpu_to_le16(work->credits_granted);
 361         }
 362         ksmbd_debug(SMB,
 363                     "credits: requested[%d] granted[%d] total_granted[%d]\n",
 364                     credits_requested, credits_granted,
 365                     conn->total_credits);
 366         return 0;
 367 }
 368
 369 /**
 370  * init_chained_smb2_rsp() - initialize smb2 chained response
 371  * @work:       smb work containing smb response buffer
 372  */
 373 static void init_chained_smb2_rsp(struct ksmbd_work *work)
 374 {
 375         struct smb2_hdr *req = ksmbd_req_buf_next(work);
 376         struct smb2_hdr *rsp = ksmbd_resp_buf_next(work);
 377         struct smb2_hdr *rsp_hdr;
 378         struct smb2_hdr *rcv_hdr;
 379         int next_hdr_offset = 0;
 380         int len, new_len;
 381
 382         /* Len of this response = updated RFC len - offset of previous cmd
 383          * in the compound rsp
 384          */
 385
 386         /* Storing the current local FID which may be needed by subsequent
 387          * command in the compound request
 388          */
 389         if (req->Command == SMB2_CREATE && rsp->Status == STATUS_SUCCESS) {
 390                 work->compound_fid = ((struct smb2_create_rsp *)rsp)->VolatileFileId;
 391                 work->compound_pfid = ((struct smb2_create_rsp *)rsp)->PersistentFileId;
 392                 work->compound_sid = le64_to_cpu(rsp->SessionId);
 393         }
 394
 395         len = get_rfc1002_len(work->response_buf) - work->next_smb2_rsp_hdr_off;
 396         next_hdr_offset = le32_to_cpu(req->NextCommand);
 397
 398         new_len = ALIGN(len, 8);
 399         work->iov[work->iov_idx].iov_len += (new_len - len);
 400         inc_rfc1001_len(work->response_buf, new_len - len);
 401         rsp->NextCommand = cpu_to_le32(new_len);
 402
 403         work->next_smb2_rcv_hdr_off += next_hdr_offset;
 404         work->curr_smb2_rsp_hdr_off = work->next_smb2_rsp_hdr_off;
 405         work->next_smb2_rsp_hdr_off += new_len;
 406         ksmbd_debug(SMB,
 407                     "Compound req new_len = %d rcv off = %d rsp off = %d\n",
 408                     new_len, work->next_smb2_rcv_hdr_off,
 409                     work->next_smb2_rsp_hdr_off);
 410
 411         rsp_hdr = ksmbd_resp_buf_next(work);
 412         rcv_hdr = ksmbd_req_buf_next(work);
 413
 414         if (!(rcv_hdr->Flags & SMB2_FLAGS_RELATED_OPERATIONS)) {
 415                 ksmbd_debug(SMB, "related flag should be set\n");
 416                 work->compound_fid = KSMBD_NO_FID;
 417                 work->compound_pfid = KSMBD_NO_FID;
 418         }
 419         memset((char *)rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);
 420         rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER;
 421         rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;
 422         rsp_hdr->Command = rcv_hdr->Command;
 423
 424         /*
 425          * Message is response. We don't grant oplock yet.
 426          */
 427         rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR |
 428                                 SMB2_FLAGS_RELATED_OPERATIONS);
 429         rsp_hdr->NextCommand = 0;
 430         rsp_hdr->MessageId = rcv_hdr->MessageId;
 431         rsp_hdr->Id.SyncId.ProcessId = rcv_hdr->Id.SyncId.ProcessId;
 432         rsp_hdr->Id.SyncId.TreeId = rcv_hdr->Id.SyncId.TreeId;
 433         rsp_hdr->SessionId = rcv_hdr->SessionId;
 434         memcpy(rsp_hdr->Signature, rcv_hdr->Signature, 16);
 435 }
 436
 437 /**
 438  * is_chained_smb2_message() - check for chained command
 439  * @work:       smb work containing smb request buffer
 440  *
 441  * Return:      true if chained request, otherwise false
 442  */
 443 bool is_chained_smb2_message(struct ksmbd_work *work)
 444 {
 445         struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
 446         unsigned int len, next_cmd;
 447
 448         if (hdr->ProtocolId != SMB2_PROTO_NUMBER)
 449                 return false;
 450
 451         hdr = ksmbd_req_buf_next(work);
 452         next_cmd = le32_to_cpu(hdr->NextCommand);
 453         if (next_cmd > 0) {
 454                 if ((u64)work->next_smb2_rcv_hdr_off + next_cmd +
 455                         __SMB2_HEADER_STRUCTURE_SIZE >
 456                     get_rfc1002_len(work->request_buf)) {
 457                         pr_err("next command(%u) offset exceeds smb msg size\n",
 458                                next_cmd);
 459                         return false;
 460                 }
 461
 462                 if ((u64)get_rfc1002_len(work->response_buf) + MAX_CIFS_SMALL_BUFFER_SIZE >
 463                     work->response_sz) {
 464                         pr_err("next response offset exceeds response buffer size\n");
 465                         return false;
 466                 }
 467
 468                 ksmbd_debug(SMB, "got SMB2 chained command\n");
 469                 init_chained_smb2_rsp(work);
 470                 return true;
 471         } else if (work->next_smb2_rcv_hdr_off) {
 472                 /*
 473                  * This is last request in chained command,
 474                  * align response to 8 byte
 475                  */
 476                 len = ALIGN(get_rfc1002_len(work->response_buf), 8);
 477                 len = len - get_rfc1002_len(work->response_buf);
 478                 if (len) {
 479                         ksmbd_debug(SMB, "padding len %u\n", len);
 480                         work->iov[work->iov_idx].iov_len += len;
 481                         inc_rfc1001_len(work->response_buf, len);
 482                 }
 483                 work->curr_smb2_rsp_hdr_off = work->next_smb2_rsp_hdr_off;
 484         }
 485         return false;
 486 }
 487
 488 /**
 489  * init_smb2_rsp_hdr() - initialize smb2 response
 490  * @work:       smb work containing smb request buffer
 491  *
 492  * Return:      0
 493  */
 494 int init_smb2_rsp_hdr(struct ksmbd_work *work)
 495 {
 496         struct smb2_hdr *rsp_hdr = smb2_get_msg(work->response_buf);
 497         struct smb2_hdr *rcv_hdr = smb2_get_msg(work->request_buf);
 498
 499         memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);
 500         rsp_hdr->ProtocolId = rcv_hdr->ProtocolId;
 501         rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;
 502         rsp_hdr->Command = rcv_hdr->Command;
 503
 504         /*
 505          * Message is response. We don't grant oplock yet.
 506          */
 507         rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR);
 508         rsp_hdr->NextCommand = 0;
 509         rsp_hdr->MessageId = rcv_hdr->MessageId;
 510         rsp_hdr->Id.SyncId.ProcessId = rcv_hdr->Id.SyncId.ProcessId;
 511         rsp_hdr->Id.SyncId.TreeId = rcv_hdr->Id.SyncId.TreeId;
 512         rsp_hdr->SessionId = rcv_hdr->SessionId;
 513         memcpy(rsp_hdr->Signature, rcv_hdr->Signature, 16);
 514
 515         return 0;
 516 }
 517
 518 /**
 519  * smb2_allocate_rsp_buf() - allocate smb2 response buffer
 520  * @work:       smb work containing smb request buffer
 521  *
 522  * Return:      0 on success, otherwise -ENOMEM
 523  */
 524 int smb2_allocate_rsp_buf(struct ksmbd_work *work)
 525 {
 526         struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
 527         size_t small_sz = MAX_CIFS_SMALL_BUFFER_SIZE;
 528         size_t large_sz = small_sz + work->conn->vals->max_trans_size;
 529         size_t sz = small_sz;
 530         int cmd = le16_to_cpu(hdr->Command);
 531
 532         if (cmd == SMB2_IOCTL_HE || cmd == SMB2_QUERY_DIRECTORY_HE)
 533                 sz = large_sz;
 534
 535         if (cmd == SMB2_QUERY_INFO_HE) {
 536                 struct smb2_query_info_req *req;
 537
 538                 req = smb2_get_msg(work->request_buf);
 539                 if ((req->InfoType == SMB2_O_INFO_FILE &&
 540                      (req->FileInfoClass == FILE_FULL_EA_INFORMATION ||
 541                      req->FileInfoClass == FILE_ALL_INFORMATION)) ||
 542                     req->InfoType == SMB2_O_INFO_SECURITY)
 543                         sz = large_sz;
 544         }
 545
 546         /* allocate large response buf for chained commands */
 547         if (le32_to_cpu(hdr->NextCommand) > 0)
 548                 sz = large_sz;
 549
 550         work->response_buf = kvzalloc(sz, GFP_KERNEL);
 551         if (!work->response_buf)
 552                 return -ENOMEM;
 553
 554         work->response_sz = sz;
 555         return 0;
 556 }
 557
 558 /**
 559  * smb2_check_user_session() - check for valid session for a user
 560  * @work:       smb work containing smb request buffer
 561  *
 562  * Return:      0 on success, otherwise error
 563  */
 564 int smb2_check_user_session(struct ksmbd_work *work)
 565 {
 566         struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work);
 567         struct ksmbd_conn *conn = work->conn;
 568         unsigned int cmd = le16_to_cpu(req_hdr->Command);
 569         unsigned long long sess_id;
 570
 571         /*
 572          * SMB2_ECHO, SMB2_NEGOTIATE, SMB2_SESSION_SETUP command do not
 573          * require a session id, so no need to validate user session's for
 574          * these commands.
 575          */
 576         if (cmd == SMB2_ECHO_HE || cmd == SMB2_NEGOTIATE_HE ||
 577             cmd == SMB2_SESSION_SETUP_HE)
 578                 return 0;
 579
 580         if (!ksmbd_conn_good(conn))
 581                 return -EIO;
 582
 583         sess_id = le64_to_cpu(req_hdr->SessionId);
 584
 585         /*
 586          * If request is not the first in Compound request,
 587          * Just validate session id in header with work->sess->id.
 588          */
 589         if (work->next_smb2_rcv_hdr_off) {
 590                 if (!work->sess) {
 591                         pr_err("The first operation in the compound does not have sess\n");
 592                         return -EINVAL;
 593                 }
 594                 if (sess_id != ULLONG_MAX && work->sess->id != sess_id) {
 595                         pr_err("session id(%llu) is different with the first operation(%lld)\n",
 596                                         sess_id, work->sess->id);
 597                         return -EINVAL;
 598                 }
 599                 return 1;
 600         }
 601
 602         /* Check for validity of user session */
 603         work->sess = ksmbd_session_lookup_all(conn, sess_id);
 604         if (work->sess)
 605                 return 1;
 606         ksmbd_debug(SMB, "Invalid user session, Uid %llu\n", sess_id);
 607         return -ENOENT;
 608 }
 609
 610 static void destroy_previous_session(struct ksmbd_conn *conn,
 611                                      struct ksmbd_user *user, u64 id)
 612 {
 613         struct ksmbd_session *prev_sess = ksmbd_session_lookup_slowpath(id);
 614         struct ksmbd_user *prev_user;
 615         struct channel *chann;
 616         long index;
 617
 618         if (!prev_sess)
 619                 return;
 620
 621         prev_user = prev_sess->user;
 622
 623         if (!prev_user ||
 624             strcmp(user->name, prev_user->name) ||
 625             user->passkey_sz != prev_user->passkey_sz ||
 626             memcmp(user->passkey, prev_user->passkey, user->passkey_sz))
 627                 return;
 628
 629         prev_sess->state = SMB2_SESSION_EXPIRED;
 630         xa_for_each(&prev_sess->ksmbd_chann_list, index, chann)
 631                 ksmbd_conn_set_exiting(chann->conn);
 632 }
 633
 634 /**
 635  * smb2_get_name() - get filename string from on the wire smb format
 636  * @src:        source buffer
 637  * @maxlen:     maxlen of source string
 638  * @local_nls:  nls_table pointer
 639  *
 640  * Return:      matching converted filename on success, otherwise error ptr
 641  */
 642 static char *
 643 smb2_get_name(const char *src, const int maxlen, struct nls_table *local_nls)
 644 {
 645         char *name;
 646
 647         name = smb_strndup_from_utf16(src, maxlen, 1, local_nls);
 648         if (IS_ERR(name)) {
 649                 pr_err("failed to get name %ld\n", PTR_ERR(name));
 650                 return name;
 651         }
 652
 653         ksmbd_conv_path_to_unix(name);
 654         ksmbd_strip_last_slash(name);
 655         return name;
 656 }
 657
 658 int setup_async_work(struct ksmbd_work *work, void (*fn)(void **), void **arg)
 659 {
 660         struct ksmbd_conn *conn = work->conn;
 661         int id;
 662
 663         id = ksmbd_acquire_async_msg_id(&conn->async_ida);
 664         if (id < 0) {
 665                 pr_err("Failed to alloc async message id\n");
 666                 return id;
 667         }
 668         work->asynchronous = true;
 669         work->async_id = id;
 670
 671         ksmbd_debug(SMB,
 672                     "Send interim Response to inform async request id : %d\n",
 673                     work->async_id);
 674
 675         work->cancel_fn = fn;
 676         work->cancel_argv = arg;
 677
 678         if (list_empty(&work->async_request_entry)) {
 679                 spin_lock(&conn->request_lock);
 680                 list_add_tail(&work->async_request_entry, &conn->async_requests);
 681                 spin_unlock(&conn->request_lock);
 682         }
 683
 684         return 0;
 685 }
 686
 687 void release_async_work(struct ksmbd_work *work)
 688 {
 689         struct ksmbd_conn *conn = work->conn;
 690
 691         spin_lock(&conn->request_lock);
 692         list_del_init(&work->async_request_entry);
 693         spin_unlock(&conn->request_lock);
 694
 695         work->asynchronous = 0;
 696         work->cancel_fn = NULL;
 697         kfree(work->cancel_argv);
 698         work->cancel_argv = NULL;
 699         if (work->async_id) {
 700                 ksmbd_release_id(&conn->async_ida, work->async_id);
 701                 work->async_id = 0;
 702         }
 703 }
 704
 705 void smb2_send_interim_resp(struct ksmbd_work *work, __le32 status)
 706 {
 707         struct smb2_hdr *rsp_hdr;
 708         struct ksmbd_work *in_work = ksmbd_alloc_work_struct();
 709
 710         if (allocate_interim_rsp_buf(in_work)) {
 711                 pr_err("smb_allocate_rsp_buf failed!\n");
 712                 ksmbd_free_work_struct(in_work);
 713                 return;
 714         }
 715
 716         in_work->conn = work->conn;
 717         memcpy(smb2_get_msg(in_work->response_buf), ksmbd_resp_buf_next(work),
 718                __SMB2_HEADER_STRUCTURE_SIZE);
 719
 720         rsp_hdr = smb2_get_msg(in_work->response_buf);
 721         rsp_hdr->Flags |= SMB2_FLAGS_ASYNC_COMMAND;
 722         rsp_hdr->Id.AsyncId = cpu_to_le64(work->async_id);
 723         smb2_set_err_rsp(in_work);
 724         rsp_hdr->Status = status;
 725
 726         ksmbd_conn_write(in_work);
 727         ksmbd_free_work_struct(in_work);
 728 }
 729
 730 static __le32 smb2_get_reparse_tag_special_file(umode_t mode)
 731 {
 732         if (S_ISDIR(mode) || S_ISREG(mode))
 733                 return 0;
 734
 735         if (S_ISLNK(mode))
 736                 return IO_REPARSE_TAG_LX_SYMLINK_LE;
 737         else if (S_ISFIFO(mode))
 738                 return IO_REPARSE_TAG_LX_FIFO_LE;
 739         else if (S_ISSOCK(mode))
 740                 return IO_REPARSE_TAG_AF_UNIX_LE;
 741         else if (S_ISCHR(mode))
 742                 return IO_REPARSE_TAG_LX_CHR_LE;
 743         else if (S_ISBLK(mode))
 744                 return IO_REPARSE_TAG_LX_BLK_LE;
 745
 746         return 0;
 747 }
 748
 749 /**
 750  * smb2_get_dos_mode() - get file mode in dos format from unix mode
 751  * @stat:       kstat containing file mode
 752  * @attribute:  attribute flags
 753  *
 754  * Return:      converted dos mode
 755  */
 756 static int smb2_get_dos_mode(struct kstat *stat, int attribute)
 757 {
 758         int attr = 0;
 759
 760         if (S_ISDIR(stat->mode)) {
 761                 attr = FILE_ATTRIBUTE_DIRECTORY |
 762                         (attribute & (FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_SYSTEM));
 763         } else {
 764                 attr = (attribute & 0x00005137) | FILE_ATTRIBUTE_ARCHIVE;
 765                 attr &= ~(FILE_ATTRIBUTE_DIRECTORY);
 766                 if (S_ISREG(stat->mode) && (server_conf.share_fake_fscaps &
 767                                 FILE_SUPPORTS_SPARSE_FILES))
 768                         attr |= FILE_ATTRIBUTE_SPARSE_FILE;
 769
 770                 if (smb2_get_reparse_tag_special_file(stat->mode))
 771                         attr |= FILE_ATTRIBUTE_REPARSE_POINT;
 772         }
 773
 774         return attr;
 775 }
 776
 777 static void build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt,
 778                                __le16 hash_id)
 779 {
 780         pneg_ctxt->ContextType = SMB2_PREAUTH_INTEGRITY_CAPABILITIES;
 781         pneg_ctxt->DataLength = cpu_to_le16(38);
 782         pneg_ctxt->HashAlgorithmCount = cpu_to_le16(1);
 783         pneg_ctxt->Reserved = cpu_to_le32(0);
 784         pneg_ctxt->SaltLength = cpu_to_le16(SMB311_SALT_SIZE);
 785         get_random_bytes(pneg_ctxt->Salt, SMB311_SALT_SIZE);
 786         pneg_ctxt->HashAlgorithms = hash_id;
 787 }
 788
 789 static void build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt,
 790                                __le16 cipher_type)
 791 {
 792         pneg_ctxt->ContextType = SMB2_ENCRYPTION_CAPABILITIES;
 793         pneg_ctxt->DataLength = cpu_to_le16(4);
 794         pneg_ctxt->Reserved = cpu_to_le32(0);
 795         pneg_ctxt->CipherCount = cpu_to_le16(1);
 796         pneg_ctxt->Ciphers[0] = cipher_type;
 797 }
 798
 799 static void build_sign_cap_ctxt(struct smb2_signing_capabilities *pneg_ctxt,
 800                                 __le16 sign_algo)
 801 {
 802         pneg_ctxt->ContextType = SMB2_SIGNING_CAPABILITIES;
 803         pneg_ctxt->DataLength =
 804                 cpu_to_le16((sizeof(struct smb2_signing_capabilities) + 2)
 805                         - sizeof(struct smb2_neg_context));
 806         pneg_ctxt->Reserved = cpu_to_le32(0);
 807         pneg_ctxt->SigningAlgorithmCount = cpu_to_le16(1);
 808         pneg_ctxt->SigningAlgorithms[0] = sign_algo;
 809 }
 810
 811 static void build_posix_ctxt(struct smb2_posix_neg_context *pneg_ctxt)
 812 {
 813         pneg_ctxt->ContextType = SMB2_POSIX_EXTENSIONS_AVAILABLE;
 814         pneg_ctxt->DataLength = cpu_to_le16(POSIX_CTXT_DATA_LEN);
 815         /* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */
 816         pneg_ctxt->Name[0] = 0x93;
 817         pneg_ctxt->Name[1] = 0xAD;
 818         pneg_ctxt->Name[2] = 0x25;
 819         pneg_ctxt->Name[3] = 0x50;
 820         pneg_ctxt->Name[4] = 0x9C;
 821         pneg_ctxt->Name[5] = 0xB4;
 822         pneg_ctxt->Name[6] = 0x11;
 823         pneg_ctxt->Name[7] = 0xE7;
 824         pneg_ctxt->Name[8] = 0xB4;
 825         pneg_ctxt->Name[9] = 0x23;
 826         pneg_ctxt->Name[10] = 0x83;
 827         pneg_ctxt->Name[11] = 0xDE;
 828         pneg_ctxt->Name[12] = 0x96;
 829         pneg_ctxt->Name[13] = 0x8B;
 830         pneg_ctxt->Name[14] = 0xCD;
 831         pneg_ctxt->Name[15] = 0x7C;
 832 }
 833
 834 static unsigned int assemble_neg_contexts(struct ksmbd_conn *conn,
 835                                   struct smb2_negotiate_rsp *rsp)
 836 {
 837         char * const pneg_ctxt = (char *)rsp +
 838                         le32_to_cpu(rsp->NegotiateContextOffset);
 839         int neg_ctxt_cnt = 1;
 840         int ctxt_size;
 841
 842         ksmbd_debug(SMB,
 843                     "assemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n");
 844         build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt,
 845                            conn->preauth_info->Preauth_HashId);
 846         ctxt_size = sizeof(struct smb2_preauth_neg_context);
 847
 848         if (conn->cipher_type) {
 849                 /* Round to 8 byte boundary */
 850                 ctxt_size = round_up(ctxt_size, 8);
 851                 ksmbd_debug(SMB,
 852                             "assemble SMB2_ENCRYPTION_CAPABILITIES context\n");
 853                 build_encrypt_ctxt((struct smb2_encryption_neg_context *)
 854                                    (pneg_ctxt + ctxt_size),
 855                                    conn->cipher_type);
 856                 neg_ctxt_cnt++;
 857                 ctxt_size += sizeof(struct smb2_encryption_neg_context) + 2;
 858         }
 859
 860         /* compression context not yet supported */
 861         WARN_ON(conn->compress_algorithm != SMB3_COMPRESS_NONE);
 862
 863         if (conn->posix_ext_supported) {
 864                 ctxt_size = round_up(ctxt_size, 8);
 865                 ksmbd_debug(SMB,
 866                             "assemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n");
 867                 build_posix_ctxt((struct smb2_posix_neg_context *)
 868                                  (pneg_ctxt + ctxt_size));
 869                 neg_ctxt_cnt++;
 870                 ctxt_size += sizeof(struct smb2_posix_neg_context);
 871         }
 872
 873         if (conn->signing_negotiated) {
 874                 ctxt_size = round_up(ctxt_size, 8);
 875                 ksmbd_debug(SMB,
 876                             "assemble SMB2_SIGNING_CAPABILITIES context\n");
 877                 build_sign_cap_ctxt((struct smb2_signing_capabilities *)
 878                                     (pneg_ctxt + ctxt_size),
 879                                     conn->signing_algorithm);
 880                 neg_ctxt_cnt++;
 881                 ctxt_size += sizeof(struct smb2_signing_capabilities) + 2;
 882         }
 883
 884         rsp->NegotiateContextCount = cpu_to_le16(neg_ctxt_cnt);
 885         return ctxt_size + AUTH_GSS_PADDING;
 886 }
 887
 888 static __le32 decode_preauth_ctxt(struct ksmbd_conn *conn,
 889                                   struct smb2_preauth_neg_context *pneg_ctxt,
 890                                   int ctxt_len)
 891 {
 892         /*
 893          * sizeof(smb2_preauth_neg_context) assumes SMB311_SALT_SIZE Salt,
 894          * which may not be present. Only check for used HashAlgorithms[1].
 895          */
 896         if (ctxt_len <
 897             sizeof(struct smb2_neg_context) + MIN_PREAUTH_CTXT_DATA_LEN)
 898                 return STATUS_INVALID_PARAMETER;
 899
 900         if (pneg_ctxt->HashAlgorithms != SMB2_PREAUTH_INTEGRITY_SHA512)
 901                 return STATUS_NO_PREAUTH_INTEGRITY_HASH_OVERLAP;
 902
 903         conn->preauth_info->Preauth_HashId = SMB2_PREAUTH_INTEGRITY_SHA512;
 904         return STATUS_SUCCESS;
 905 }
 906
 907 static void decode_encrypt_ctxt(struct ksmbd_conn *conn,
 908                                 struct smb2_encryption_neg_context *pneg_ctxt,
 909                                 int ctxt_len)
 910 {
 911         int cph_cnt;
 912         int i, cphs_size;
 913
 914         if (sizeof(struct smb2_encryption_neg_context) > ctxt_len) {
 915                 pr_err("Invalid SMB2_ENCRYPTION_CAPABILITIES context size\n");
 916                 return;
 917         }
 918
 919         conn->cipher_type = 0;
 920
 921         cph_cnt = le16_to_cpu(pneg_ctxt->CipherCount);
 922         cphs_size = cph_cnt * sizeof(__le16);
 923
 924         if (sizeof(struct smb2_encryption_neg_context) + cphs_size >
 925             ctxt_len) {
 926                 pr_err("Invalid cipher count(%d)\n", cph_cnt);
 927                 return;
 928         }
 929
 930         if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION_OFF)
 931                 return;
 932
 933         for (i = 0; i < cph_cnt; i++) {
 934                 if (pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_GCM ||
 935                     pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_CCM ||
 936                     pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_CCM ||
 937                     pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_GCM) {
 938                         ksmbd_debug(SMB, "Cipher ID = 0x%x\n",
 939                                     pneg_ctxt->Ciphers[i]);
 940                         conn->cipher_type = pneg_ctxt->Ciphers[i];
 941                         break;
 942                 }
 943         }
 944 }
 945
 946 /**
 947  * smb3_encryption_negotiated() - checks if server and client agreed on enabling encryption
 948  * @conn:       smb connection
 949  *
 950  * Return:      true if connection should be encrypted, else false
 951  */
 952 bool smb3_encryption_negotiated(struct ksmbd_conn *conn)
 953 {
 954         if (!conn->ops->generate_encryptionkey)
 955                 return false;
 956
 957         /*
 958          * SMB 3.0 and 3.0.2 dialects use the SMB2_GLOBAL_CAP_ENCRYPTION flag.
 959          * SMB 3.1.1 uses the cipher_type field.
 960          */
 961         return (conn->vals->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION) ||
 962             conn->cipher_type;
 963 }
 964
 965 static void decode_compress_ctxt(struct ksmbd_conn *conn,
 966                                  struct smb2_compression_capabilities_context *pneg_ctxt)
 967 {
 968         conn->compress_algorithm = SMB3_COMPRESS_NONE;
 969 }
 970
 971 static void decode_sign_cap_ctxt(struct ksmbd_conn *conn,
 972                                  struct smb2_signing_capabilities *pneg_ctxt,
 973                                  int ctxt_len)
 974 {
 975         int sign_algo_cnt;
 976         int i, sign_alos_size;
 977
 978         if (sizeof(struct smb2_signing_capabilities) > ctxt_len) {
 979                 pr_err("Invalid SMB2_SIGNING_CAPABILITIES context length\n");
 980                 return;
 981         }
 982
 983         conn->signing_negotiated = false;
 984         sign_algo_cnt = le16_to_cpu(pneg_ctxt->SigningAlgorithmCount);
 985         sign_alos_size = sign_algo_cnt * sizeof(__le16);
 986
 987         if (sizeof(struct smb2_signing_capabilities) + sign_alos_size >
 988             ctxt_len) {
 989                 pr_err("Invalid signing algorithm count(%d)\n", sign_algo_cnt);
 990                 return;
 991         }
 992
 993         for (i = 0; i < sign_algo_cnt; i++) {
 994                 if (pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_HMAC_SHA256_LE ||
 995                     pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_AES_CMAC_LE) {
 996                         ksmbd_debug(SMB, "Signing Algorithm ID = 0x%x\n",
 997                                     pneg_ctxt->SigningAlgorithms[i]);
 998                         conn->signing_negotiated = true;
 999                         conn->signing_algorithm =
1000                                 pneg_ctxt->SigningAlgorithms[i];
1001                         break;
1002                 }
1003         }
1004 }
1005
1006 static __le32 deassemble_neg_contexts(struct ksmbd_conn *conn,
1007                                       struct smb2_negotiate_req *req,
1008                                       unsigned int len_of_smb)
1009 {
1010         /* +4 is to account for the RFC1001 len field */
1011         struct smb2_neg_context *pctx = (struct smb2_neg_context *)req;
1012         int i = 0, len_of_ctxts;
1013         unsigned int offset = le32_to_cpu(req->NegotiateContextOffset);
1014         unsigned int neg_ctxt_cnt = le16_to_cpu(req->NegotiateContextCount);
1015         __le32 status = STATUS_INVALID_PARAMETER;
1016
1017         ksmbd_debug(SMB, "decoding %d negotiate contexts\n", neg_ctxt_cnt);
1018         if (len_of_smb <= offset) {
1019                 ksmbd_debug(SMB, "Invalid response: negotiate context offset\n");
1020                 return status;
1021         }
1022
1023         len_of_ctxts = len_of_smb - offset;
1024
1025         while (i++ < neg_ctxt_cnt) {
1026                 int clen, ctxt_len;
1027
1028                 if (len_of_ctxts < (int)sizeof(struct smb2_neg_context))
1029                         break;
1030
1031                 pctx = (struct smb2_neg_context *)((char *)pctx + offset);
1032                 clen = le16_to_cpu(pctx->DataLength);
1033                 ctxt_len = clen + sizeof(struct smb2_neg_context);
1034
1035                 if (ctxt_len > len_of_ctxts)
1036                         break;
1037
1038                 if (pctx->ContextType == SMB2_PREAUTH_INTEGRITY_CAPABILITIES) {
1039                         ksmbd_debug(SMB,
1040                                     "deassemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n");
1041                         if (conn->preauth_info->Preauth_HashId)
1042                                 break;
1043
1044                         status = decode_preauth_ctxt(conn,
1045                                                      (struct smb2_preauth_neg_context *)pctx,
1046                                                      ctxt_len);
1047                         if (status != STATUS_SUCCESS)
1048                                 break;
1049                 } else if (pctx->ContextType == SMB2_ENCRYPTION_CAPABILITIES) {
1050                         ksmbd_debug(SMB,
1051                                     "deassemble SMB2_ENCRYPTION_CAPABILITIES context\n");
1052                         if (conn->cipher_type)
1053                                 break;
1054
1055                         decode_encrypt_ctxt(conn,
1056                                             (struct smb2_encryption_neg_context *)pctx,
1057                                             ctxt_len);
1058                 } else if (pctx->ContextType == SMB2_COMPRESSION_CAPABILITIES) {
1059                         ksmbd_debug(SMB,
1060                                     "deassemble SMB2_COMPRESSION_CAPABILITIES context\n");
1061                         if (conn->compress_algorithm)
1062                                 break;
1063
1064                         decode_compress_ctxt(conn,
1065                                              (struct smb2_compression_capabilities_context *)pctx);
1066                 } else if (pctx->ContextType == SMB2_NETNAME_NEGOTIATE_CONTEXT_ID) {
1067                         ksmbd_debug(SMB,
1068                                     "deassemble SMB2_NETNAME_NEGOTIATE_CONTEXT_ID context\n");
1069                 } else if (pctx->ContextType == SMB2_POSIX_EXTENSIONS_AVAILABLE) {
1070                         ksmbd_debug(SMB,
1071                                     "deassemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n");
1072                         conn->posix_ext_supported = true;
1073                 } else if (pctx->ContextType == SMB2_SIGNING_CAPABILITIES) {
1074                         ksmbd_debug(SMB,
1075                                     "deassemble SMB2_SIGNING_CAPABILITIES context\n");
1076
1077                         decode_sign_cap_ctxt(conn,
1078                                              (struct smb2_signing_capabilities *)pctx,
1079                                              ctxt_len);
1080                 }
1081
1082                 /* offsets must be 8 byte aligned */
1083                 offset = (ctxt_len + 7) & ~0x7;
1084                 len_of_ctxts -= offset;
1085         }
1086         return status;
1087 }
1088
1089 /**
1090  * smb2_handle_negotiate() - handler for smb2 negotiate command
1091  * @work:       smb work containing smb request buffer
1092  *
1093  * Return:      0
1094  */
1095 int smb2_handle_negotiate(struct ksmbd_work *work)
1096 {
1097         struct ksmbd_conn *conn = work->conn;
1098         struct smb2_negotiate_req *req = smb2_get_msg(work->request_buf);
1099         struct smb2_negotiate_rsp *rsp = smb2_get_msg(work->response_buf);
1100         int rc = 0;
1101         unsigned int smb2_buf_len, smb2_neg_size, neg_ctxt_len = 0;
1102         __le32 status;
1103
1104         ksmbd_debug(SMB, "Received negotiate request\n");
1105         conn->need_neg = false;
1106         if (ksmbd_conn_good(conn)) {
1107                 pr_err("conn->tcp_status is already in CifsGood State\n");
1108                 work->send_no_response = 1;
1109                 return rc;
1110         }
1111
1112         smb2_buf_len = get_rfc1002_len(work->request_buf);
1113         smb2_neg_size = offsetof(struct smb2_negotiate_req, Dialects);
1114         if (smb2_neg_size > smb2_buf_len) {
1115                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1116                 rc = -EINVAL;
1117                 goto err_out;
1118         }
1119
1120         if (req->DialectCount == 0) {
1121                 pr_err("malformed packet\n");
1122                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1123                 rc = -EINVAL;
1124                 goto err_out;
1125         }
1126
1127         if (conn->dialect == SMB311_PROT_ID) {
1128                 unsigned int nego_ctxt_off = le32_to_cpu(req->NegotiateContextOffset);
1129
1130                 if (smb2_buf_len < nego_ctxt_off) {
1131                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1132                         rc = -EINVAL;
1133                         goto err_out;
1134                 }
1135
1136                 if (smb2_neg_size > nego_ctxt_off) {
1137                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1138                         rc = -EINVAL;
1139                         goto err_out;
1140                 }
1141
1142                 if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) >
1143                     nego_ctxt_off) {
1144                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1145                         rc = -EINVAL;
1146                         goto err_out;
1147                 }
1148         } else {
1149                 if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) >
1150                     smb2_buf_len) {
1151                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1152                         rc = -EINVAL;
1153                         goto err_out;
1154                 }
1155         }
1156
1157         conn->cli_cap = le32_to_cpu(req->Capabilities);
1158         switch (conn->dialect) {
1159         case SMB311_PROT_ID:
1160                 conn->preauth_info =
1161                         kzalloc(sizeof(struct preauth_integrity_info),
1162                                 GFP_KERNEL);
1163                 if (!conn->preauth_info) {
1164                         rc = -ENOMEM;
1165                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1166                         goto err_out;
1167                 }
1168
1169                 status = deassemble_neg_contexts(conn, req,
1170                                                  get_rfc1002_len(work->request_buf));
1171                 if (status != STATUS_SUCCESS) {
1172                         pr_err("deassemble_neg_contexts error(0x%x)\n",
1173                                status);
1174                         rsp->hdr.Status = status;
1175                         rc = -EINVAL;
1176                         kfree(conn->preauth_info);
1177                         conn->preauth_info = NULL;
1178                         goto err_out;
1179                 }
1180
1181                 rc = init_smb3_11_server(conn);
1182                 if (rc < 0) {
1183                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1184                         kfree(conn->preauth_info);
1185                         conn->preauth_info = NULL;
1186                         goto err_out;
1187                 }
1188
1189                 ksmbd_gen_preauth_integrity_hash(conn,
1190                                                  work->request_buf,
1191                                                  conn->preauth_info->Preauth_HashValue);
1192                 rsp->NegotiateContextOffset =
1193                                 cpu_to_le32(OFFSET_OF_NEG_CONTEXT);
1194                 neg_ctxt_len = assemble_neg_contexts(conn, rsp);
1195                 break;
1196         case SMB302_PROT_ID:
1197                 init_smb3_02_server(conn);
1198                 break;
1199         case SMB30_PROT_ID:
1200                 init_smb3_0_server(conn);
1201                 break;
1202         case SMB21_PROT_ID:
1203                 init_smb2_1_server(conn);
1204                 break;
1205         case SMB2X_PROT_ID:
1206         case BAD_PROT_ID:
1207         default:
1208                 ksmbd_debug(SMB, "Server dialect :0x%x not supported\n",
1209                             conn->dialect);
1210                 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
1211                 rc = -EINVAL;
1212                 goto err_out;
1213         }
1214         rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
1215
1216         /* For stats */
1217         conn->connection_type = conn->dialect;
1218
1219         rsp->MaxTransactSize = cpu_to_le32(conn->vals->max_trans_size);
1220         rsp->MaxReadSize = cpu_to_le32(conn->vals->max_read_size);
1221         rsp->MaxWriteSize = cpu_to_le32(conn->vals->max_write_size);
1222
1223         memcpy(conn->ClientGUID, req->ClientGUID,
1224                         SMB2_CLIENT_GUID_SIZE);
1225         conn->cli_sec_mode = le16_to_cpu(req->SecurityMode);
1226
1227         rsp->StructureSize = cpu_to_le16(65);
1228         rsp->DialectRevision = cpu_to_le16(conn->dialect);
1229         /* Not setting conn guid rsp->ServerGUID, as it
1230          * not used by client for identifying server
1231          */
1232         memset(rsp->ServerGUID, 0, SMB2_CLIENT_GUID_SIZE);
1233
1234         rsp->SystemTime = cpu_to_le64(ksmbd_systime());
1235         rsp->ServerStartTime = 0;
1236         ksmbd_debug(SMB, "negotiate context offset %d, count %d\n",
1237                     le32_to_cpu(rsp->NegotiateContextOffset),
1238                     le16_to_cpu(rsp->NegotiateContextCount));
1239
1240         rsp->SecurityBufferOffset = cpu_to_le16(128);
1241         rsp->SecurityBufferLength = cpu_to_le16(AUTH_GSS_LENGTH);
1242         ksmbd_copy_gss_neg_header((char *)(&rsp->hdr) +
1243                                   le16_to_cpu(rsp->SecurityBufferOffset));
1244
1245         rsp->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED_LE;
1246         conn->use_spnego = true;
1247
1248         if ((server_conf.signing == KSMBD_CONFIG_OPT_AUTO ||
1249              server_conf.signing == KSMBD_CONFIG_OPT_DISABLED) &&
1250             req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED_LE)
1251                 conn->sign = true;
1252         else if (server_conf.signing == KSMBD_CONFIG_OPT_MANDATORY) {
1253                 server_conf.enforced_signing = true;
1254                 rsp->SecurityMode |= SMB2_NEGOTIATE_SIGNING_REQUIRED_LE;
1255                 conn->sign = true;
1256         }
1257
1258         conn->srv_sec_mode = le16_to_cpu(rsp->SecurityMode);
1259         ksmbd_conn_set_need_negotiate(conn);
1260
1261 err_out:
1262         if (rc)
1263                 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
1264
1265         if (!rc)
1266                 rc = ksmbd_iov_pin_rsp(work, rsp,
1267                                        sizeof(struct smb2_negotiate_rsp) +
1268                                         AUTH_GSS_LENGTH + neg_ctxt_len);
1269         if (rc < 0)
1270                 smb2_set_err_rsp(work);
1271         return rc;
1272 }
1273
1274 static int alloc_preauth_hash(struct ksmbd_session *sess,
1275                               struct ksmbd_conn *conn)
1276 {
1277         if (sess->Preauth_HashValue)
1278                 return 0;
1279
1280         sess->Preauth_HashValue = kmemdup(conn->preauth_info->Preauth_HashValue,
1281                                           PREAUTH_HASHVALUE_SIZE, GFP_KERNEL);
1282         if (!sess->Preauth_HashValue)
1283                 return -ENOMEM;
1284
1285         return 0;
1286 }
1287
1288 static int generate_preauth_hash(struct ksmbd_work *work)
1289 {
1290         struct ksmbd_conn *conn = work->conn;
1291         struct ksmbd_session *sess = work->sess;
1292         u8 *preauth_hash;
1293
1294         if (conn->dialect != SMB311_PROT_ID)
1295                 return 0;
1296
1297         if (conn->binding) {
1298                 struct preauth_session *preauth_sess;
1299
1300                 preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id);
1301                 if (!preauth_sess) {
1302                         preauth_sess = ksmbd_preauth_session_alloc(conn, sess->id);
1303                         if (!preauth_sess)
1304                                 return -ENOMEM;
1305                 }
1306
1307                 preauth_hash = preauth_sess->Preauth_HashValue;
1308         } else {
1309                 if (!sess->Preauth_HashValue)
1310                         if (alloc_preauth_hash(sess, conn))
1311                                 return -ENOMEM;
1312                 preauth_hash = sess->Preauth_HashValue;
1313         }
1314
1315         ksmbd_gen_preauth_integrity_hash(conn, work->request_buf, preauth_hash);
1316         return 0;
1317 }
1318
1319 static int decode_negotiation_token(struct ksmbd_conn *conn,
1320                                     struct negotiate_message *negblob,
1321                                     size_t sz)
1322 {
1323         if (!conn->use_spnego)
1324                 return -EINVAL;
1325
1326         if (ksmbd_decode_negTokenInit((char *)negblob, sz, conn)) {
1327                 if (ksmbd_decode_negTokenTarg((char *)negblob, sz, conn)) {
1328                         conn->auth_mechs |= KSMBD_AUTH_NTLMSSP;
1329                         conn->preferred_auth_mech = KSMBD_AUTH_NTLMSSP;
1330                         conn->use_spnego = false;
1331                 }
1332         }
1333         return 0;
1334 }
1335
1336 static int ntlm_negotiate(struct ksmbd_work *work,
1337                           struct negotiate_message *negblob,
1338                           size_t negblob_len, struct smb2_sess_setup_rsp *rsp)
1339 {
1340         struct challenge_message *chgblob;
1341         unsigned char *spnego_blob = NULL;
1342         u16 spnego_blob_len;
1343         char *neg_blob;
1344         int sz, rc;
1345
1346         ksmbd_debug(SMB, "negotiate phase\n");
1347         rc = ksmbd_decode_ntlmssp_neg_blob(negblob, negblob_len, work->conn);
1348         if (rc)
1349                 return rc;
1350
1351         sz = le16_to_cpu(rsp->SecurityBufferOffset);
1352         chgblob =
1353                 (struct challenge_message *)((char *)&rsp->hdr.ProtocolId + sz);
1354         memset(chgblob, 0, sizeof(struct challenge_message));
1355
1356         if (!work->conn->use_spnego) {
1357                 sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->conn);
1358                 if (sz < 0)
1359                         return -ENOMEM;
1360
1361                 rsp->SecurityBufferLength = cpu_to_le16(sz);
1362                 return 0;
1363         }
1364
1365         sz = sizeof(struct challenge_message);
1366         sz += (strlen(ksmbd_netbios_name()) * 2 + 1 + 4) * 6;
1367
1368         neg_blob = kzalloc(sz, GFP_KERNEL);
1369         if (!neg_blob)
1370                 return -ENOMEM;
1371
1372         chgblob = (struct challenge_message *)neg_blob;
1373         sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->conn);
1374         if (sz < 0) {
1375                 rc = -ENOMEM;
1376                 goto out;
1377         }
1378
1379         rc = build_spnego_ntlmssp_neg_blob(&spnego_blob, &spnego_blob_len,
1380                                            neg_blob, sz);
1381         if (rc) {
1382                 rc = -ENOMEM;
1383                 goto out;
1384         }
1385
1386         sz = le16_to_cpu(rsp->SecurityBufferOffset);
1387         memcpy((char *)&rsp->hdr.ProtocolId + sz, spnego_blob, spnego_blob_len);
1388         rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len);
1389
1390 out:
1391         kfree(spnego_blob);
1392         kfree(neg_blob);
1393         return rc;
1394 }
1395
1396 static struct authenticate_message *user_authblob(struct ksmbd_conn *conn,
1397                                                   struct smb2_sess_setup_req *req)
1398 {
1399         int sz;
1400
1401         if (conn->use_spnego && conn->mechToken)
1402                 return (struct authenticate_message *)conn->mechToken;
1403
1404         sz = le16_to_cpu(req->SecurityBufferOffset);
1405         return (struct authenticate_message *)((char *)&req->hdr.ProtocolId
1406                                                + sz);
1407 }
1408
1409 static struct ksmbd_user *session_user(struct ksmbd_conn *conn,
1410                                        struct smb2_sess_setup_req *req)
1411 {
1412         struct authenticate_message *authblob;
1413         struct ksmbd_user *user;
1414         char *name;
1415         unsigned int name_off, name_len, secbuf_len;
1416
1417         secbuf_len = le16_to_cpu(req->SecurityBufferLength);
1418         if (secbuf_len < sizeof(struct authenticate_message)) {
1419                 ksmbd_debug(SMB, "blob len %d too small\n", secbuf_len);
1420                 return NULL;
1421         }
1422         authblob = user_authblob(conn, req);
1423         name_off = le32_to_cpu(authblob->UserName.BufferOffset);
1424         name_len = le16_to_cpu(authblob->UserName.Length);
1425
1426         if (secbuf_len < (u64)name_off + name_len)
1427                 return NULL;
1428
1429         name = smb_strndup_from_utf16((const char *)authblob + name_off,
1430                                       name_len,
1431                                       true,
1432                                       conn->local_nls);
1433         if (IS_ERR(name)) {
1434                 pr_err("cannot allocate memory\n");
1435                 return NULL;
1436         }
1437
1438         ksmbd_debug(SMB, "session setup request for user %s\n", name);
1439         user = ksmbd_login_user(name);
1440         kfree(name);
1441         return user;
1442 }
1443
1444 static int ntlm_authenticate(struct ksmbd_work *work,
1445                              struct smb2_sess_setup_req *req,
1446                              struct smb2_sess_setup_rsp *rsp)
1447 {
1448         struct ksmbd_conn *conn = work->conn;
1449         struct ksmbd_session *sess = work->sess;
1450         struct channel *chann = NULL;
1451         struct ksmbd_user *user;
1452         u64 prev_id;
1453         int sz, rc;
1454
1455         ksmbd_debug(SMB, "authenticate phase\n");
1456         if (conn->use_spnego) {
1457                 unsigned char *spnego_blob;
1458                 u16 spnego_blob_len;
1459
1460                 rc = build_spnego_ntlmssp_auth_blob(&spnego_blob,
1461                                                     &spnego_blob_len,
1462                                                     0);
1463                 if (rc)
1464                         return -ENOMEM;
1465
1466                 sz = le16_to_cpu(rsp->SecurityBufferOffset);
1467                 memcpy((char *)&rsp->hdr.ProtocolId + sz, spnego_blob, spnego_blob_len);
1468                 rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len);
1469                 kfree(spnego_blob);
1470         }
1471
1472         user = session_user(conn, req);
1473         if (!user) {
1474                 ksmbd_debug(SMB, "Unknown user name or an error\n");
1475                 return -EPERM;
1476         }
1477
1478         /* Check for previous session */
1479         prev_id = le64_to_cpu(req->PreviousSessionId);
1480         if (prev_id && prev_id != sess->id)
1481                 destroy_previous_session(conn, user, prev_id);
1482
1483         if (sess->state == SMB2_SESSION_VALID) {
1484                 /*
1485                  * Reuse session if anonymous try to connect
1486                  * on reauthetication.
1487                  */
1488                 if (conn->binding == false && ksmbd_anonymous_user(user)) {
1489                         ksmbd_free_user(user);
1490                         return 0;
1491                 }
1492
1493                 if (!ksmbd_compare_user(sess->user, user)) {
1494                         ksmbd_free_user(user);
1495                         return -EPERM;
1496                 }
1497                 ksmbd_free_user(user);
1498         } else {
1499                 sess->user = user;
1500         }
1501
1502         if (conn->binding == false && user_guest(sess->user)) {
1503                 rsp->SessionFlags = SMB2_SESSION_FLAG_IS_GUEST_LE;
1504         } else {
1505                 struct authenticate_message *authblob;
1506
1507                 authblob = user_authblob(conn, req);
1508                 sz = le16_to_cpu(req->SecurityBufferLength);
1509                 rc = ksmbd_decode_ntlmssp_auth_blob(authblob, sz, conn, sess);
1510                 if (rc) {
1511                         set_user_flag(sess->user, KSMBD_USER_FLAG_BAD_PASSWORD);
1512                         ksmbd_debug(SMB, "authentication failed\n");
1513                         return -EPERM;
1514                 }
1515         }
1516
1517         /*
1518          * If session state is SMB2_SESSION_VALID, We can assume
1519          * that it is reauthentication. And the user/password
1520          * has been verified, so return it here.
1521          */
1522         if (sess->state == SMB2_SESSION_VALID) {
1523                 if (conn->binding)
1524                         goto binding_session;
1525                 return 0;
1526         }
1527
1528         if ((rsp->SessionFlags != SMB2_SESSION_FLAG_IS_GUEST_LE &&
1529              (conn->sign || server_conf.enforced_signing)) ||
1530             (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED))
1531                 sess->sign = true;
1532
1533         if (smb3_encryption_negotiated(conn) &&
1534                         !(req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) {
1535                 rc = conn->ops->generate_encryptionkey(conn, sess);
1536                 if (rc) {
1537                         ksmbd_debug(SMB,
1538                                         "SMB3 encryption key generation failed\n");
1539                         return -EINVAL;
1540                 }
1541                 sess->enc = true;
1542                 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION)
1543                         rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE;
1544                 /*
1545                  * signing is disable if encryption is enable
1546                  * on this session
1547                  */
1548                 sess->sign = false;
1549         }
1550
1551 binding_session:
1552         if (conn->dialect >= SMB30_PROT_ID) {
1553                 chann = lookup_chann_list(sess, conn);
1554                 if (!chann) {
1555                         chann = kmalloc(sizeof(struct channel), GFP_KERNEL);
1556                         if (!chann)
1557                                 return -ENOMEM;
1558
1559                         chann->conn = conn;
1560                         xa_store(&sess->ksmbd_chann_list, (long)conn, chann, GFP_KERNEL);
1561                 }
1562         }
1563
1564         if (conn->ops->generate_signingkey) {
1565                 rc = conn->ops->generate_signingkey(sess, conn);
1566                 if (rc) {
1567                         ksmbd_debug(SMB, "SMB3 signing key generation failed\n");
1568                         return -EINVAL;
1569                 }
1570         }
1571
1572         if (!ksmbd_conn_lookup_dialect(conn)) {
1573                 pr_err("fail to verify the dialect\n");
1574                 return -ENOENT;
1575         }
1576         return 0;
1577 }
1578
1579 #ifdef CONFIG_SMB_SERVER_KERBEROS5
1580 static int krb5_authenticate(struct ksmbd_work *work,
1581                              struct smb2_sess_setup_req *req,
1582                              struct smb2_sess_setup_rsp *rsp)
1583 {
1584         struct ksmbd_conn *conn = work->conn;
1585         struct ksmbd_session *sess = work->sess;
1586         char *in_blob, *out_blob;
1587         struct channel *chann = NULL;
1588         u64 prev_sess_id;
1589         int in_len, out_len;
1590         int retval;
1591
1592         in_blob = (char *)&req->hdr.ProtocolId +
1593                 le16_to_cpu(req->SecurityBufferOffset);
1594         in_len = le16_to_cpu(req->SecurityBufferLength);
1595         out_blob = (char *)&rsp->hdr.ProtocolId +
1596                 le16_to_cpu(rsp->SecurityBufferOffset);
1597         out_len = work->response_sz -
1598                 (le16_to_cpu(rsp->SecurityBufferOffset) + 4);
1599
1600         /* Check previous session */
1601         prev_sess_id = le64_to_cpu(req->PreviousSessionId);
1602         if (prev_sess_id && prev_sess_id != sess->id)
1603                 destroy_previous_session(conn, sess->user, prev_sess_id);
1604
1605         if (sess->state == SMB2_SESSION_VALID)
1606                 ksmbd_free_user(sess->user);
1607
1608         retval = ksmbd_krb5_authenticate(sess, in_blob, in_len,
1609                                          out_blob, &out_len);
1610         if (retval) {
1611                 ksmbd_debug(SMB, "krb5 authentication failed\n");
1612                 return -EINVAL;
1613         }
1614         rsp->SecurityBufferLength = cpu_to_le16(out_len);
1615
1616         if ((conn->sign || server_conf.enforced_signing) ||
1617             (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED))
1618                 sess->sign = true;
1619
1620         if (smb3_encryption_negotiated(conn)) {
1621                 retval = conn->ops->generate_encryptionkey(conn, sess);
1622                 if (retval) {
1623                         ksmbd_debug(SMB,
1624                                     "SMB3 encryption key generation failed\n");
1625                         return -EINVAL;
1626                 }
1627                 sess->enc = true;
1628                 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION)
1629                         rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE;
1630                 sess->sign = false;
1631         }
1632
1633         if (conn->dialect >= SMB30_PROT_ID) {
1634                 chann = lookup_chann_list(sess, conn);
1635                 if (!chann) {
1636                         chann = kmalloc(sizeof(struct channel), GFP_KERNEL);
1637                         if (!chann)
1638                                 return -ENOMEM;
1639
1640                         chann->conn = conn;
1641                         xa_store(&sess->ksmbd_chann_list, (long)conn, chann, GFP_KERNEL);
1642                 }
1643         }
1644
1645         if (conn->ops->generate_signingkey) {
1646                 retval = conn->ops->generate_signingkey(sess, conn);
1647                 if (retval) {
1648                         ksmbd_debug(SMB, "SMB3 signing key generation failed\n");
1649                         return -EINVAL;
1650                 }
1651         }
1652
1653         if (!ksmbd_conn_lookup_dialect(conn)) {
1654                 pr_err("fail to verify the dialect\n");
1655                 return -ENOENT;
1656         }
1657         return 0;
1658 }
1659 #else
1660 static int krb5_authenticate(struct ksmbd_work *work,
1661                              struct smb2_sess_setup_req *req,
1662                              struct smb2_sess_setup_rsp *rsp)
1663 {
1664         return -EOPNOTSUPP;
1665 }
1666 #endif
1667
1668 int smb2_sess_setup(struct ksmbd_work *work)
1669 {
1670         struct ksmbd_conn *conn = work->conn;
1671         struct smb2_sess_setup_req *req;
1672         struct smb2_sess_setup_rsp *rsp;
1673         struct ksmbd_session *sess;
1674         struct negotiate_message *negblob;
1675         unsigned int negblob_len, negblob_off;
1676         int rc = 0;
1677
1678         ksmbd_debug(SMB, "Received request for session setup\n");
1679
1680         WORK_BUFFERS(work, req, rsp);
1681
1682         rsp->StructureSize = cpu_to_le16(9);
1683         rsp->SessionFlags = 0;
1684         rsp->SecurityBufferOffset = cpu_to_le16(72);
1685         rsp->SecurityBufferLength = 0;
1686
1687         ksmbd_conn_lock(conn);
1688         if (!req->hdr.SessionId) {
1689                 sess = ksmbd_smb2_session_create();
1690                 if (!sess) {
1691                         rc = -ENOMEM;
1692                         goto out_err;
1693                 }
1694                 rsp->hdr.SessionId = cpu_to_le64(sess->id);
1695                 rc = ksmbd_session_register(conn, sess);
1696                 if (rc)
1697                         goto out_err;
1698         } else if (conn->dialect >= SMB30_PROT_ID &&
1699                    (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) &&
1700                    req->Flags & SMB2_SESSION_REQ_FLAG_BINDING) {
1701                 u64 sess_id = le64_to_cpu(req->hdr.SessionId);
1702
1703                 sess = ksmbd_session_lookup_slowpath(sess_id);
1704                 if (!sess) {
1705                         rc = -ENOENT;
1706                         goto out_err;
1707                 }
1708
1709                 if (conn->dialect != sess->dialect) {
1710                         rc = -EINVAL;
1711                         goto out_err;
1712                 }
1713
1714                 if (!(req->hdr.Flags & SMB2_FLAGS_SIGNED)) {
1715                         rc = -EINVAL;
1716                         goto out_err;
1717                 }
1718
1719                 if (strncmp(conn->ClientGUID, sess->ClientGUID,
1720                             SMB2_CLIENT_GUID_SIZE)) {
1721                         rc = -ENOENT;
1722                         goto out_err;
1723                 }
1724
1725                 if (sess->state == SMB2_SESSION_IN_PROGRESS) {
1726                         rc = -EACCES;
1727                         goto out_err;
1728                 }
1729
1730                 if (sess->state == SMB2_SESSION_EXPIRED) {
1731                         rc = -EFAULT;
1732                         goto out_err;
1733                 }
1734
1735                 if (ksmbd_conn_need_reconnect(conn)) {
1736                         rc = -EFAULT;
1737                         sess = NULL;
1738                         goto out_err;
1739                 }
1740
1741                 if (ksmbd_session_lookup(conn, sess_id)) {
1742                         rc = -EACCES;
1743                         goto out_err;
1744                 }
1745
1746                 if (user_guest(sess->user)) {
1747                         rc = -EOPNOTSUPP;
1748                         goto out_err;
1749                 }
1750
1751                 conn->binding = true;
1752         } else if ((conn->dialect < SMB30_PROT_ID ||
1753                     server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) &&
1754                    (req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) {
1755                 sess = NULL;
1756                 rc = -EACCES;
1757                 goto out_err;
1758         } else {
1759                 sess = ksmbd_session_lookup(conn,
1760                                             le64_to_cpu(req->hdr.SessionId));
1761                 if (!sess) {
1762                         rc = -ENOENT;
1763                         goto out_err;
1764                 }
1765
1766                 if (sess->state == SMB2_SESSION_EXPIRED) {
1767                         rc = -EFAULT;
1768                         goto out_err;
1769                 }
1770
1771                 if (ksmbd_conn_need_reconnect(conn)) {
1772                         rc = -EFAULT;
1773                         sess = NULL;
1774                         goto out_err;
1775                 }
1776         }
1777         work->sess = sess;
1778
1779         negblob_off = le16_to_cpu(req->SecurityBufferOffset);
1780         negblob_len = le16_to_cpu(req->SecurityBufferLength);
1781         if (negblob_off < offsetof(struct smb2_sess_setup_req, Buffer) ||
1782             negblob_len < offsetof(struct negotiate_message, NegotiateFlags)) {
1783                 rc = -EINVAL;
1784                 goto out_err;
1785         }
1786
1787         negblob = (struct negotiate_message *)((char *)&req->hdr.ProtocolId +
1788                         negblob_off);
1789
1790         if (decode_negotiation_token(conn, negblob, negblob_len) == 0) {
1791                 if (conn->mechToken)
1792                         negblob = (struct negotiate_message *)conn->mechToken;
1793         }
1794
1795         if (server_conf.auth_mechs & conn->auth_mechs) {
1796                 rc = generate_preauth_hash(work);
1797                 if (rc)
1798                         goto out_err;
1799
1800                 if (conn->preferred_auth_mech &
1801                                 (KSMBD_AUTH_KRB5 | KSMBD_AUTH_MSKRB5)) {
1802                         rc = krb5_authenticate(work, req, rsp);
1803                         if (rc) {
1804                                 rc = -EINVAL;
1805                                 goto out_err;
1806                         }
1807
1808                         if (!ksmbd_conn_need_reconnect(conn)) {
1809                                 ksmbd_conn_set_good(conn);
1810                                 sess->state = SMB2_SESSION_VALID;
1811                         }
1812                         kfree(sess->Preauth_HashValue);
1813                         sess->Preauth_HashValue = NULL;
1814                 } else if (conn->preferred_auth_mech == KSMBD_AUTH_NTLMSSP) {
1815                         if (negblob->MessageType == NtLmNegotiate) {
1816                                 rc = ntlm_negotiate(work, negblob, negblob_len, rsp);
1817                                 if (rc)
1818                                         goto out_err;
1819                                 rsp->hdr.Status =
1820                                         STATUS_MORE_PROCESSING_REQUIRED;
1821                         } else if (negblob->MessageType == NtLmAuthenticate) {
1822                                 rc = ntlm_authenticate(work, req, rsp);
1823                                 if (rc)
1824                                         goto out_err;
1825
1826                                 if (!ksmbd_conn_need_reconnect(conn)) {
1827                                         ksmbd_conn_set_good(conn);
1828                                         sess->state = SMB2_SESSION_VALID;
1829                                 }
1830                                 if (conn->binding) {
1831                                         struct preauth_session *preauth_sess;
1832
1833                                         preauth_sess =
1834                                                 ksmbd_preauth_session_lookup(conn, sess->id);
1835                                         if (preauth_sess) {
1836                                                 list_del(&preauth_sess->preauth_entry);
1837                                                 kfree(preauth_sess);
1838                                         }
1839                                 }
1840                                 kfree(sess->Preauth_HashValue);
1841                                 sess->Preauth_HashValue = NULL;
1842                         } else {
1843                                 pr_info_ratelimited("Unknown NTLMSSP message type : 0x%x\n",
1844                                                 le32_to_cpu(negblob->MessageType));
1845                                 rc = -EINVAL;
1846                         }
1847                 } else {
1848                         /* TODO: need one more negotiation */
1849                         pr_err("Not support the preferred authentication\n");
1850                         rc = -EINVAL;
1851                 }
1852         } else {
1853                 pr_err("Not support authentication\n");
1854                 rc = -EINVAL;
1855         }
1856
1857 out_err:
1858         if (rc == -EINVAL)
1859                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1860         else if (rc == -ENOENT)
1861                 rsp->hdr.Status = STATUS_USER_SESSION_DELETED;
1862         else if (rc == -EACCES)
1863                 rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED;
1864         else if (rc == -EFAULT)
1865                 rsp->hdr.Status = STATUS_NETWORK_SESSION_EXPIRED;
1866         else if (rc == -ENOMEM)
1867                 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
1868         else if (rc == -EOPNOTSUPP)
1869                 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
1870         else if (rc)
1871                 rsp->hdr.Status = STATUS_LOGON_FAILURE;
1872
1873         if (conn->use_spnego && conn->mechToken) {
1874                 kfree(conn->mechToken);
1875                 conn->mechToken = NULL;
1876         }
1877
1878         if (rc < 0) {
1879                 /*
1880                  * SecurityBufferOffset should be set to zero
1881                  * in session setup error response.
1882                  */
1883                 rsp->SecurityBufferOffset = 0;
1884
1885                 if (sess) {
1886                         bool try_delay = false;
1887
1888                         /*
1889                          * To avoid dictionary attacks (repeated session setups rapidly sent) to
1890                          * connect to server, ksmbd make a delay of a 5 seconds on session setup
1891                          * failure to make it harder to send enough random connection requests
1892                          * to break into a server.
1893                          */
1894                         if (sess->user && sess->user->flags & KSMBD_USER_FLAG_DELAY_SESSION)
1895                                 try_delay = true;
1896
1897                         sess->last_active = jiffies;
1898                         sess->state = SMB2_SESSION_EXPIRED;
1899                         if (try_delay) {
1900                                 ksmbd_conn_set_need_reconnect(conn);
1901                                 ssleep(5);
1902                                 ksmbd_conn_set_need_negotiate(conn);
1903                         }
1904                 }
1905                 smb2_set_err_rsp(work);
1906         } else {
1907                 unsigned int iov_len;
1908
1909                 if (rsp->SecurityBufferLength)
1910                         iov_len = offsetof(struct smb2_sess_setup_rsp, Buffer) +
1911                                 le16_to_cpu(rsp->SecurityBufferLength);
1912                 else
1913                         iov_len = sizeof(struct smb2_sess_setup_rsp);
1914                 rc = ksmbd_iov_pin_rsp(work, rsp, iov_len);
1915                 if (rc)
1916                         rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
1917         }
1918
1919         ksmbd_conn_unlock(conn);
1920         return rc;
1921 }
1922
1923 /**
1924  * smb2_tree_connect() - handler for smb2 tree connect command
1925  * @work:       smb work containing smb request buffer
1926  *
1927  * Return:      0 on success, otherwise error
1928  */
1929 int smb2_tree_connect(struct ksmbd_work *work)
1930 {
1931         struct ksmbd_conn *conn = work->conn;
1932         struct smb2_tree_connect_req *req;
1933         struct smb2_tree_connect_rsp *rsp;
1934         struct ksmbd_session *sess = work->sess;
1935         char *treename = NULL, *name = NULL;
1936         struct ksmbd_tree_conn_status status;
1937         struct ksmbd_share_config *share;
1938         int rc = -EINVAL;
1939
1940         WORK_BUFFERS(work, req, rsp);
1941
1942         treename = smb_strndup_from_utf16(req->Buffer,
1943                                           le16_to_cpu(req->PathLength), true,
1944                                           conn->local_nls);
1945         if (IS_ERR(treename)) {
1946                 pr_err("treename is NULL\n");
1947                 status.ret = KSMBD_TREE_CONN_STATUS_ERROR;
1948                 goto out_err1;
1949         }
1950
1951         name = ksmbd_extract_sharename(conn->um, treename);
1952         if (IS_ERR(name)) {
1953                 status.ret = KSMBD_TREE_CONN_STATUS_ERROR;
1954                 goto out_err1;
1955         }
1956
1957         ksmbd_debug(SMB, "tree connect request for tree %s treename %s\n",
1958                     name, treename);
1959
1960         status = ksmbd_tree_conn_connect(conn, sess, name);
1961         if (status.ret == KSMBD_TREE_CONN_STATUS_OK)
1962                 rsp->hdr.Id.SyncId.TreeId = cpu_to_le32(status.tree_conn->id);
1963         else
1964                 goto out_err1;
1965
1966         share = status.tree_conn->share_conf;
1967         if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) {
1968                 ksmbd_debug(SMB, "IPC share path request\n");
1969                 rsp->ShareType = SMB2_SHARE_TYPE_PIPE;
1970                 rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE |
1971                         FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE |
1972                         FILE_DELETE_LE | FILE_READ_CONTROL_LE |
1973                         FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE |
1974                         FILE_SYNCHRONIZE_LE;
1975         } else {
1976                 rsp->ShareType = SMB2_SHARE_TYPE_DISK;
1977                 rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE |
1978                         FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE;
1979                 if (test_tree_conn_flag(status.tree_conn,
1980                                         KSMBD_TREE_CONN_FLAG_WRITABLE)) {
1981                         rsp->MaximalAccess |= FILE_WRITE_DATA_LE |
1982                                 FILE_APPEND_DATA_LE | FILE_WRITE_EA_LE |
1983                                 FILE_DELETE_LE | FILE_WRITE_ATTRIBUTES_LE |
1984                                 FILE_DELETE_CHILD_LE | FILE_READ_CONTROL_LE |
1985                                 FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE |
1986                                 FILE_SYNCHRONIZE_LE;
1987                 }
1988         }
1989
1990         status.tree_conn->maximal_access = le32_to_cpu(rsp->MaximalAccess);
1991         if (conn->posix_ext_supported)
1992                 status.tree_conn->posix_extensions = true;
1993
1994         write_lock(&sess->tree_conns_lock);
1995         status.tree_conn->t_state = TREE_CONNECTED;
1996         write_unlock(&sess->tree_conns_lock);
1997         rsp->StructureSize = cpu_to_le16(16);
1998 out_err1:
1999         rsp->Capabilities = 0;
2000         rsp->Reserved = 0;
2001         /* default manual caching */
2002         rsp->ShareFlags = SMB2_SHAREFLAG_MANUAL_CACHING;
2003
2004         rc = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_tree_connect_rsp));
2005         if (rc)
2006                 status.ret = KSMBD_TREE_CONN_STATUS_NOMEM;
2007
2008         if (!IS_ERR(treename))
2009                 kfree(treename);
2010         if (!IS_ERR(name))
2011                 kfree(name);
2012
2013         switch (status.ret) {
2014         case KSMBD_TREE_CONN_STATUS_OK:
2015                 rsp->hdr.Status = STATUS_SUCCESS;
2016                 rc = 0;
2017                 break;
2018         case -ESTALE:
2019         case -ENOENT:
2020         case KSMBD_TREE_CONN_STATUS_NO_SHARE:
2021                 rsp->hdr.Status = STATUS_BAD_NETWORK_NAME;
2022                 break;
2023         case -ENOMEM:
2024         case KSMBD_TREE_CONN_STATUS_NOMEM:
2025                 rsp->hdr.Status = STATUS_NO_MEMORY;
2026                 break;
2027         case KSMBD_TREE_CONN_STATUS_ERROR:
2028         case KSMBD_TREE_CONN_STATUS_TOO_MANY_CONNS:
2029         case KSMBD_TREE_CONN_STATUS_TOO_MANY_SESSIONS:
2030                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
2031                 break;
2032         case -EINVAL:
2033                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
2034                 break;
2035         default:
2036                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
2037         }
2038
2039         if (status.ret != KSMBD_TREE_CONN_STATUS_OK)
2040                 smb2_set_err_rsp(work);
2041
2042         return rc;
2043 }
2044
2045 /**
2046  * smb2_create_open_flags() - convert smb open flags to unix open flags
2047  * @file_present:       is file already present
2048  * @access:             file access flags
2049  * @disposition:        file disposition flags
2050  * @may_flags:          set with MAY_ flags
2051  *
2052  * Return:      file open flags
2053  */
2054 static int smb2_create_open_flags(bool file_present, __le32 access,
2055                                   __le32 disposition,
2056                                   int *may_flags)
2057 {
2058         int oflags = O_NONBLOCK | O_LARGEFILE;
2059
2060         if (access & FILE_READ_DESIRED_ACCESS_LE &&
2061             access & FILE_WRITE_DESIRE_ACCESS_LE) {
2062                 oflags |= O_RDWR;
2063                 *may_flags = MAY_OPEN | MAY_READ | MAY_WRITE;
2064         } else if (access & FILE_WRITE_DESIRE_ACCESS_LE) {
2065                 oflags |= O_WRONLY;
2066                 *may_flags = MAY_OPEN | MAY_WRITE;
2067         } else {
2068                 oflags |= O_RDONLY;
2069                 *may_flags = MAY_OPEN | MAY_READ;
2070         }
2071
2072         if (access == FILE_READ_ATTRIBUTES_LE)
2073                 oflags |= O_PATH;
2074
2075         if (file_present) {
2076                 switch (disposition & FILE_CREATE_MASK_LE) {
2077                 case FILE_OPEN_LE:
2078                 case FILE_CREATE_LE:
2079                         break;
2080                 case FILE_SUPERSEDE_LE:
2081                 case FILE_OVERWRITE_LE:
2082                 case FILE_OVERWRITE_IF_LE:
2083                         oflags |= O_TRUNC;
2084                         break;
2085                 default:
2086                         break;
2087                 }
2088         } else {
2089                 switch (disposition & FILE_CREATE_MASK_LE) {
2090                 case FILE_SUPERSEDE_LE:
2091                 case FILE_CREATE_LE:
2092                 case FILE_OPEN_IF_LE:
2093                 case FILE_OVERWRITE_IF_LE:
2094                         oflags |= O_CREAT;
2095                         break;
2096                 case FILE_OPEN_LE:
2097                 case FILE_OVERWRITE_LE:
2098                         oflags &= ~O_CREAT;
2099                         break;
2100                 default:
2101                         break;
2102                 }
2103         }
2104
2105         return oflags;
2106 }
2107
2108 /**
2109  * smb2_tree_disconnect() - handler for smb tree connect request
2110  * @work:       smb work containing request buffer
2111  *
2112  * Return:      0
2113  */
2114 int smb2_tree_disconnect(struct ksmbd_work *work)
2115 {
2116         struct smb2_tree_disconnect_rsp *rsp;
2117         struct smb2_tree_disconnect_req *req;
2118         struct ksmbd_session *sess = work->sess;
2119         struct ksmbd_tree_connect *tcon = work->tcon;
2120         int err;
2121
2122         WORK_BUFFERS(work, req, rsp);
2123
2124         ksmbd_debug(SMB, "request\n");
2125
2126         if (!tcon) {
2127                 ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId);
2128
2129                 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2130                 err = -ENOENT;
2131                 goto err_out;
2132         }
2133
2134         ksmbd_close_tree_conn_fds(work);
2135
2136         write_lock(&sess->tree_conns_lock);
2137         if (tcon->t_state == TREE_DISCONNECTED) {
2138                 write_unlock(&sess->tree_conns_lock);
2139                 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2140                 err = -ENOENT;
2141                 goto err_out;
2142         }
2143
2144         WARN_ON_ONCE(atomic_dec_and_test(&tcon->refcount));
2145         tcon->t_state = TREE_DISCONNECTED;
2146         write_unlock(&sess->tree_conns_lock);
2147
2148         err = ksmbd_tree_conn_disconnect(sess, tcon);
2149         if (err) {
2150                 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2151                 goto err_out;
2152         }
2153
2154         work->tcon = NULL;
2155
2156         rsp->StructureSize = cpu_to_le16(4);
2157         err = ksmbd_iov_pin_rsp(work, rsp,
2158                                 sizeof(struct smb2_tree_disconnect_rsp));
2159         if (err) {
2160                 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
2161                 goto err_out;
2162         }
2163
2164         return 0;
2165
2166 err_out:
2167         smb2_set_err_rsp(work);
2168         return err;
2169
2170 }
2171
2172 /**
2173  * smb2_session_logoff() - handler for session log off request
2174  * @work:       smb work containing request buffer
2175  *
2176  * Return:      0
2177  */
2178 int smb2_session_logoff(struct ksmbd_work *work)
2179 {
2180         struct ksmbd_conn *conn = work->conn;
2181         struct smb2_logoff_req *req;
2182         struct smb2_logoff_rsp *rsp;
2183         struct ksmbd_session *sess;
2184         u64 sess_id;
2185         int err;
2186
2187         WORK_BUFFERS(work, req, rsp);
2188
2189         ksmbd_debug(SMB, "request\n");
2190
2191         ksmbd_conn_lock(conn);
2192         if (!ksmbd_conn_good(conn)) {
2193                 ksmbd_conn_unlock(conn);
2194                 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2195                 smb2_set_err_rsp(work);
2196                 return -ENOENT;
2197         }
2198         sess_id = le64_to_cpu(req->hdr.SessionId);
2199         ksmbd_all_conn_set_status(sess_id, KSMBD_SESS_NEED_RECONNECT);
2200         ksmbd_conn_unlock(conn);
2201
2202         ksmbd_close_session_fds(work);
2203         ksmbd_conn_wait_idle(conn, sess_id);
2204
2205         /*
2206          * Re-lookup session to validate if session is deleted
2207          * while waiting request complete
2208          */
2209         sess = ksmbd_session_lookup_all(conn, sess_id);
2210         if (ksmbd_tree_conn_session_logoff(sess)) {
2211                 ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId);
2212                 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2213                 smb2_set_err_rsp(work);
2214                 return -ENOENT;
2215         }
2216
2217         ksmbd_destroy_file_table(&sess->file_table);
2218         sess->state = SMB2_SESSION_EXPIRED;
2219
2220         ksmbd_free_user(sess->user);
2221         sess->user = NULL;
2222         ksmbd_all_conn_set_status(sess_id, KSMBD_SESS_NEED_NEGOTIATE);
2223
2224         rsp->StructureSize = cpu_to_le16(4);
2225         err = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_logoff_rsp));
2226         if (err) {
2227                 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
2228                 smb2_set_err_rsp(work);
2229                 return err;
2230         }
2231         return 0;
2232 }
2233
2234 /**
2235  * create_smb2_pipe() - create IPC pipe
2236  * @work:       smb work containing request buffer
2237  *
2238  * Return:      0 on success, otherwise error
2239  */
2240 static noinline int create_smb2_pipe(struct ksmbd_work *work)
2241 {
2242         struct smb2_create_rsp *rsp;
2243         struct smb2_create_req *req;
2244         int id;
2245         int err;
2246         char *name;
2247
2248         WORK_BUFFERS(work, req, rsp);
2249
2250         name = smb_strndup_from_utf16(req->Buffer, le16_to_cpu(req->NameLength),
2251                                       1, work->conn->local_nls);
2252         if (IS_ERR(name)) {
2253                 rsp->hdr.Status = STATUS_NO_MEMORY;
2254                 err = PTR_ERR(name);
2255                 goto out;
2256         }
2257
2258         id = ksmbd_session_rpc_open(work->sess, name);
2259         if (id < 0) {
2260                 pr_err("Unable to open RPC pipe: %d\n", id);
2261                 err = id;
2262                 goto out;
2263         }
2264
2265         rsp->hdr.Status = STATUS_SUCCESS;
2266         rsp->StructureSize = cpu_to_le16(89);
2267         rsp->OplockLevel = SMB2_OPLOCK_LEVEL_NONE;
2268         rsp->Flags = 0;
2269         rsp->CreateAction = cpu_to_le32(FILE_OPENED);
2270
2271         rsp->CreationTime = cpu_to_le64(0);
2272         rsp->LastAccessTime = cpu_to_le64(0);
2273         rsp->ChangeTime = cpu_to_le64(0);
2274         rsp->AllocationSize = cpu_to_le64(0);
2275         rsp->EndofFile = cpu_to_le64(0);
2276         rsp->FileAttributes = FILE_ATTRIBUTE_NORMAL_LE;
2277         rsp->Reserved2 = 0;
2278         rsp->VolatileFileId = id;
2279         rsp->PersistentFileId = 0;
2280         rsp->CreateContextsOffset = 0;
2281         rsp->CreateContextsLength = 0;
2282
2283         err = ksmbd_iov_pin_rsp(work, rsp, offsetof(struct smb2_create_rsp, Buffer));
2284         if (err)
2285                 goto out;
2286
2287         kfree(name);
2288         return 0;
2289
2290 out:
2291         switch (err) {
2292         case -EINVAL:
2293                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
2294                 break;
2295         case -ENOSPC:
2296         case -ENOMEM:
2297                 rsp->hdr.Status = STATUS_NO_MEMORY;
2298                 break;
2299         }
2300
2301         if (!IS_ERR(name))
2302                 kfree(name);
2303
2304         smb2_set_err_rsp(work);
2305         return err;
2306 }
2307
2308 /**
2309  * smb2_set_ea() - handler for setting extended attributes using set
2310  *              info command
2311  * @eabuf:      set info command buffer
2312  * @buf_len:    set info command buffer length
2313  * @path:       dentry path for get ea
2314  *
2315  * Return:      0 on success, otherwise error
2316  */
2317 static int smb2_set_ea(struct smb2_ea_info *eabuf, unsigned int buf_len,
2318                        const struct path *path)
2319 {
2320         struct mnt_idmap *idmap = mnt_idmap(path->mnt);
2321         char *attr_name = NULL, *value;
2322         int rc = 0;
2323         unsigned int next = 0;
2324
2325         if (buf_len < sizeof(struct smb2_ea_info) + eabuf->EaNameLength +
2326                         le16_to_cpu(eabuf->EaValueLength))
2327                 return -EINVAL;
2328
2329         attr_name = kmalloc(XATTR_NAME_MAX + 1, GFP_KERNEL);
2330         if (!attr_name)
2331                 return -ENOMEM;
2332
2333         do {
2334                 if (!eabuf->EaNameLength)
2335                         goto next;
2336
2337                 ksmbd_debug(SMB,
2338                             "name : <%s>, name_len : %u, value_len : %u, next : %u\n",
2339                             eabuf->name, eabuf->EaNameLength,
2340                             le16_to_cpu(eabuf->EaValueLength),
2341                             le32_to_cpu(eabuf->NextEntryOffset));
2342
2343                 if (eabuf->EaNameLength >
2344                     (XATTR_NAME_MAX - XATTR_USER_PREFIX_LEN)) {
2345                         rc = -EINVAL;
2346                         break;
2347                 }
2348
2349                 memcpy(attr_name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN);
2350                 memcpy(&attr_name[XATTR_USER_PREFIX_LEN], eabuf->name,
2351                        eabuf->EaNameLength);
2352                 attr_name[XATTR_USER_PREFIX_LEN + eabuf->EaNameLength] = '\0';
2353                 value = (char *)&eabuf->name + eabuf->EaNameLength + 1;
2354
2355                 if (!eabuf->EaValueLength) {
2356                         rc = ksmbd_vfs_casexattr_len(idmap,
2357                                                      path->dentry,
2358                                                      attr_name,
2359                                                      XATTR_USER_PREFIX_LEN +
2360                                                      eabuf->EaNameLength);
2361
2362                         /* delete the EA only when it exits */
2363                         if (rc > 0) {
2364                                 rc = ksmbd_vfs_remove_xattr(idmap,
2365                                                             path,
2366                                                             attr_name);
2367
2368                                 if (rc < 0) {
2369                                         ksmbd_debug(SMB,
2370                                                     "remove xattr failed(%d)\n",
2371                                                     rc);
2372                                         break;
2373                                 }
2374                         }
2375
2376                         /* if the EA doesn't exist, just do nothing. */
2377                         rc = 0;
2378                 } else {
2379                         rc = ksmbd_vfs_setxattr(idmap, path, attr_name, value,
2380                                                 le16_to_cpu(eabuf->EaValueLength),
2381                                                 0, true);
2382                         if (rc < 0) {
2383                                 ksmbd_debug(SMB,
2384                                             "ksmbd_vfs_setxattr is failed(%d)\n",
2385                                             rc);
2386                                 break;
2387                         }
2388                 }
2389
2390 next:
2391                 next = le32_to_cpu(eabuf->NextEntryOffset);
2392                 if (next == 0 || buf_len < next)
2393                         break;
2394                 buf_len -= next;
2395                 eabuf = (struct smb2_ea_info *)((char *)eabuf + next);
2396                 if (buf_len < sizeof(struct smb2_ea_info)) {
2397                         rc = -EINVAL;
2398                         break;
2399                 }
2400
2401                 if (buf_len < sizeof(struct smb2_ea_info) + eabuf->EaNameLength +
2402                                 le16_to_cpu(eabuf->EaValueLength)) {
2403                         rc = -EINVAL;
2404                         break;
2405                 }
2406         } while (next != 0);
2407
2408         kfree(attr_name);
2409         return rc;
2410 }
2411
2412 static noinline int smb2_set_stream_name_xattr(const struct path *path,
2413                                                struct ksmbd_file *fp,
2414                                                char *stream_name, int s_type)
2415 {
2416         struct mnt_idmap *idmap = mnt_idmap(path->mnt);
2417         size_t xattr_stream_size;
2418         char *xattr_stream_name;
2419         int rc;
2420
2421         rc = ksmbd_vfs_xattr_stream_name(stream_name,
2422                                          &xattr_stream_name,
2423                                          &xattr_stream_size,
2424                                          s_type);
2425         if (rc)
2426                 return rc;
2427
2428         fp->stream.name = xattr_stream_name;
2429         fp->stream.size = xattr_stream_size;
2430
2431         /* Check if there is stream prefix in xattr space */
2432         rc = ksmbd_vfs_casexattr_len(idmap,
2433                                      path->dentry,
2434                                      xattr_stream_name,
2435                                      xattr_stream_size);
2436         if (rc >= 0)
2437                 return 0;
2438
2439         if (fp->cdoption == FILE_OPEN_LE) {
2440                 ksmbd_debug(SMB, "XATTR stream name lookup failed: %d\n", rc);
2441                 return -EBADF;
2442         }
2443
2444         rc = ksmbd_vfs_setxattr(idmap, path, xattr_stream_name, NULL, 0, 0, false);
2445         if (rc < 0)
2446                 pr_err("Failed to store XATTR stream name :%d\n", rc);
2447         return 0;
2448 }
2449
2450 static int smb2_remove_smb_xattrs(const struct path *path)
2451 {
2452         struct mnt_idmap *idmap = mnt_idmap(path->mnt);
2453         char *name, *xattr_list = NULL;
2454         ssize_t xattr_list_len;
2455         int err = 0;
2456
2457         xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
2458         if (xattr_list_len < 0) {
2459                 goto out;
2460         } else if (!xattr_list_len) {
2461                 ksmbd_debug(SMB, "empty xattr in the file\n");
2462                 goto out;
2463         }
2464
2465         for (name = xattr_list; name - xattr_list < xattr_list_len;
2466                         name += strlen(name) + 1) {
2467                 ksmbd_debug(SMB, "%s, len %zd\n", name, strlen(name));
2468
2469                 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN) &&
2470                     !strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX,
2471                              STREAM_PREFIX_LEN)) {
2472                         err = ksmbd_vfs_remove_xattr(idmap, path,
2473                                                      name);
2474                         if (err)
2475                                 ksmbd_debug(SMB, "remove xattr failed : %s\n",
2476                                             name);
2477                 }
2478         }
2479 out:
2480         kvfree(xattr_list);
2481         return err;
2482 }
2483
2484 static int smb2_create_truncate(const struct path *path)
2485 {
2486         int rc = vfs_truncate(path, 0);
2487
2488         if (rc) {
2489                 pr_err("vfs_truncate failed, rc %d\n", rc);
2490                 return rc;
2491         }
2492
2493         rc = smb2_remove_smb_xattrs(path);
2494         if (rc == -EOPNOTSUPP)
2495                 rc = 0;
2496         if (rc)
2497                 ksmbd_debug(SMB,
2498                             "ksmbd_truncate_stream_name_xattr failed, rc %d\n",
2499                             rc);
2500         return rc;
2501 }
2502
2503 static void smb2_new_xattrs(struct ksmbd_tree_connect *tcon, const struct path *path,
2504                             struct ksmbd_file *fp)
2505 {
2506         struct xattr_dos_attrib da = {0};
2507         int rc;
2508
2509         if (!test_share_config_flag(tcon->share_conf,
2510                                     KSMBD_SHARE_FLAG_STORE_DOS_ATTRS))
2511                 return;
2512
2513         da.version = 4;
2514         da.attr = le32_to_cpu(fp->f_ci->m_fattr);
2515         da.itime = da.create_time = fp->create_time;
2516         da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME |
2517                 XATTR_DOSINFO_ITIME;
2518
2519         rc = ksmbd_vfs_set_dos_attrib_xattr(mnt_idmap(path->mnt), path, &da, true);
2520         if (rc)
2521                 ksmbd_debug(SMB, "failed to store file attribute into xattr\n");
2522 }
2523
2524 static void smb2_update_xattrs(struct ksmbd_tree_connect *tcon,
2525                                const struct path *path, struct ksmbd_file *fp)
2526 {
2527         struct xattr_dos_attrib da;
2528         int rc;
2529
2530         fp->f_ci->m_fattr &= ~(FILE_ATTRIBUTE_HIDDEN_LE | FILE_ATTRIBUTE_SYSTEM_LE);
2531
2532         /* get FileAttributes from XATTR_NAME_DOS_ATTRIBUTE */
2533         if (!test_share_config_flag(tcon->share_conf,
2534                                     KSMBD_SHARE_FLAG_STORE_DOS_ATTRS))
2535                 return;
2536
2537         rc = ksmbd_vfs_get_dos_attrib_xattr(mnt_idmap(path->mnt),
2538                                             path->dentry, &da);
2539         if (rc > 0) {
2540                 fp->f_ci->m_fattr = cpu_to_le32(da.attr);
2541                 fp->create_time = da.create_time;
2542                 fp->itime = da.itime;
2543         }
2544 }
2545
2546 static int smb2_creat(struct ksmbd_work *work, struct path *parent_path,
2547                       struct path *path, char *name, int open_flags,
2548                       umode_t posix_mode, bool is_dir)
2549 {
2550         struct ksmbd_tree_connect *tcon = work->tcon;
2551         struct ksmbd_share_config *share = tcon->share_conf;
2552         umode_t mode;
2553         int rc;
2554
2555         if (!(open_flags & O_CREAT))
2556                 return -EBADF;
2557
2558         ksmbd_debug(SMB, "file does not exist, so creating\n");
2559         if (is_dir == true) {
2560                 ksmbd_debug(SMB, "creating directory\n");
2561
2562                 mode = share_config_directory_mode(share, posix_mode);
2563                 rc = ksmbd_vfs_mkdir(work, name, mode);
2564                 if (rc)
2565                         return rc;
2566         } else {
2567                 ksmbd_debug(SMB, "creating regular file\n");
2568
2569                 mode = share_config_create_mode(share, posix_mode);
2570                 rc = ksmbd_vfs_create(work, name, mode);
2571                 if (rc)
2572                         return rc;
2573         }
2574
2575         rc = ksmbd_vfs_kern_path_locked(work, name, 0, parent_path, path, 0);
2576         if (rc) {
2577                 pr_err("cannot get linux path (%s), err = %d\n",
2578                        name, rc);
2579                 return rc;
2580         }
2581         return 0;
2582 }
2583
2584 static int smb2_create_sd_buffer(struct ksmbd_work *work,
2585                                  struct smb2_create_req *req,
2586                                  const struct path *path)
2587 {
2588         struct create_context *context;
2589         struct create_sd_buf_req *sd_buf;
2590
2591         if (!req->CreateContextsOffset)
2592                 return -ENOENT;
2593
2594         /* Parse SD BUFFER create contexts */
2595         context = smb2_find_context_vals(req, SMB2_CREATE_SD_BUFFER, 4);
2596         if (!context)
2597                 return -ENOENT;
2598         else if (IS_ERR(context))
2599                 return PTR_ERR(context);
2600
2601         ksmbd_debug(SMB,
2602                     "Set ACLs using SMB2_CREATE_SD_BUFFER context\n");
2603         sd_buf = (struct create_sd_buf_req *)context;
2604         if (le16_to_cpu(context->DataOffset) +
2605             le32_to_cpu(context->DataLength) <
2606             sizeof(struct create_sd_buf_req))
2607                 return -EINVAL;
2608         return set_info_sec(work->conn, work->tcon, path, &sd_buf->ntsd,
2609                             le32_to_cpu(sd_buf->ccontext.DataLength), true, false);
2610 }
2611
2612 static void ksmbd_acls_fattr(struct smb_fattr *fattr,
2613                              struct mnt_idmap *idmap,
2614                              struct inode *inode)
2615 {
2616         vfsuid_t vfsuid = i_uid_into_vfsuid(idmap, inode);
2617         vfsgid_t vfsgid = i_gid_into_vfsgid(idmap, inode);
2618
2619         fattr->cf_uid = vfsuid_into_kuid(vfsuid);
2620         fattr->cf_gid = vfsgid_into_kgid(vfsgid);
2621         fattr->cf_mode = inode->i_mode;
2622         fattr->cf_acls = NULL;
2623         fattr->cf_dacls = NULL;
2624
2625         if (IS_ENABLED(CONFIG_FS_POSIX_ACL)) {
2626                 fattr->cf_acls = get_inode_acl(inode, ACL_TYPE_ACCESS);
2627                 if (S_ISDIR(inode->i_mode))
2628                         fattr->cf_dacls = get_inode_acl(inode, ACL_TYPE_DEFAULT);
2629         }
2630 }
2631
2632 /**
2633  * smb2_open() - handler for smb file open request
2634  * @work:       smb work containing request buffer
2635  *
2636  * Return:      0 on success, otherwise error
2637  */
2638 int smb2_open(struct ksmbd_work *work)
2639 {
2640         struct ksmbd_conn *conn = work->conn;
2641         struct ksmbd_session *sess = work->sess;
2642         struct ksmbd_tree_connect *tcon = work->tcon;
2643         struct smb2_create_req *req;
2644         struct smb2_create_rsp *rsp;
2645         struct path path, parent_path;
2646         struct ksmbd_share_config *share = tcon->share_conf;
2647         struct ksmbd_file *fp = NULL;
2648         struct file *filp = NULL;
2649         struct mnt_idmap *idmap = NULL;
2650         struct kstat stat;
2651         struct create_context *context;
2652         struct lease_ctx_info *lc = NULL;
2653         struct create_ea_buf_req *ea_buf = NULL;
2654         struct oplock_info *opinfo;
2655         __le32 *next_ptr = NULL;
2656         int req_op_level = 0, open_flags = 0, may_flags = 0, file_info = 0;
2657         int rc = 0;
2658         int contxt_cnt = 0, query_disk_id = 0;
2659         int maximal_access_ctxt = 0, posix_ctxt = 0;
2660         int s_type = 0;
2661         int next_off = 0;
2662         char *name = NULL;
2663         char *stream_name = NULL;
2664         bool file_present = false, created = false, already_permitted = false;
2665         int share_ret, need_truncate = 0;
2666         u64 time;
2667         umode_t posix_mode = 0;
2668         __le32 daccess, maximal_access = 0;
2669         int iov_len = 0;
2670
2671         WORK_BUFFERS(work, req, rsp);
2672
2673         if (req->hdr.NextCommand && !work->next_smb2_rcv_hdr_off &&
2674             (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)) {
2675                 ksmbd_debug(SMB, "invalid flag in chained command\n");
2676                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
2677                 smb2_set_err_rsp(work);
2678                 return -EINVAL;
2679         }
2680
2681         if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) {
2682                 ksmbd_debug(SMB, "IPC pipe create request\n");
2683                 return create_smb2_pipe(work);
2684         }
2685
2686         if (req->NameLength) {
2687                 if ((req->CreateOptions & FILE_DIRECTORY_FILE_LE) &&
2688                     *(char *)req->Buffer == '\\') {
2689                         pr_err("not allow directory name included leading slash\n");
2690                         rc = -EINVAL;
2691                         goto err_out2;
2692                 }
2693
2694                 name = smb2_get_name(req->Buffer,
2695                                      le16_to_cpu(req->NameLength),
2696                                      work->conn->local_nls);
2697                 if (IS_ERR(name)) {
2698                         rc = PTR_ERR(name);
2699                         if (rc != -ENOMEM)
2700                                 rc = -ENOENT;
2701                         name = NULL;
2702                         goto err_out2;
2703                 }
2704
2705                 ksmbd_debug(SMB, "converted name = %s\n", name);
2706                 if (strchr(name, ':')) {
2707                         if (!test_share_config_flag(work->tcon->share_conf,
2708                                                     KSMBD_SHARE_FLAG_STREAMS)) {
2709                                 rc = -EBADF;
2710                                 goto err_out2;
2711                         }
2712                         rc = parse_stream_name(name, &stream_name, &s_type);
2713                         if (rc < 0)
2714                                 goto err_out2;
2715                 }
2716
2717                 rc = ksmbd_validate_filename(name);
2718                 if (rc < 0)
2719                         goto err_out2;
2720
2721                 if (ksmbd_share_veto_filename(share, name)) {
2722                         rc = -ENOENT;
2723                         ksmbd_debug(SMB, "Reject open(), vetoed file: %s\n",
2724                                     name);
2725                         goto err_out2;
2726                 }
2727         } else {
2728                 name = kstrdup("", GFP_KERNEL);
2729                 if (!name) {
2730                         rc = -ENOMEM;
2731                         goto err_out2;
2732                 }
2733         }
2734
2735         if (le32_to_cpu(req->ImpersonationLevel) > le32_to_cpu(IL_DELEGATE)) {
2736                 pr_err("Invalid impersonationlevel : 0x%x\n",
2737                        le32_to_cpu(req->ImpersonationLevel));
2738                 rc = -EIO;
2739                 rsp->hdr.Status = STATUS_BAD_IMPERSONATION_LEVEL;
2740                 goto err_out2;
2741         }
2742
2743         if (req->CreateOptions && !(req->CreateOptions & CREATE_OPTIONS_MASK_LE)) {
2744                 pr_err("Invalid create options : 0x%x\n",
2745                        le32_to_cpu(req->CreateOptions));
2746                 rc = -EINVAL;
2747                 goto err_out2;
2748         } else {
2749                 if (req->CreateOptions & FILE_SEQUENTIAL_ONLY_LE &&
2750                     req->CreateOptions & FILE_RANDOM_ACCESS_LE)
2751                         req->CreateOptions = ~(FILE_SEQUENTIAL_ONLY_LE);
2752
2753                 if (req->CreateOptions &
2754                     (FILE_OPEN_BY_FILE_ID_LE | CREATE_TREE_CONNECTION |
2755                      FILE_RESERVE_OPFILTER_LE)) {
2756                         rc = -EOPNOTSUPP;
2757                         goto err_out2;
2758                 }
2759
2760                 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) {
2761                         if (req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE) {
2762                                 rc = -EINVAL;
2763                                 goto err_out2;
2764                         } else if (req->CreateOptions & FILE_NO_COMPRESSION_LE) {
2765                                 req->CreateOptions = ~(FILE_NO_COMPRESSION_LE);
2766                         }
2767                 }
2768         }
2769
2770         if (le32_to_cpu(req->CreateDisposition) >
2771             le32_to_cpu(FILE_OVERWRITE_IF_LE)) {
2772                 pr_err("Invalid create disposition : 0x%x\n",
2773                        le32_to_cpu(req->CreateDisposition));
2774                 rc = -EINVAL;
2775                 goto err_out2;
2776         }
2777
2778         if (!(req->DesiredAccess & DESIRED_ACCESS_MASK)) {
2779                 pr_err("Invalid desired access : 0x%x\n",
2780                        le32_to_cpu(req->DesiredAccess));
2781                 rc = -EACCES;
2782                 goto err_out2;
2783         }
2784
2785         if (req->FileAttributes && !(req->FileAttributes & FILE_ATTRIBUTE_MASK_LE)) {
2786                 pr_err("Invalid file attribute : 0x%x\n",
2787                        le32_to_cpu(req->FileAttributes));
2788                 rc = -EINVAL;
2789                 goto err_out2;
2790         }
2791
2792         if (req->CreateContextsOffset) {
2793                 /* Parse non-durable handle create contexts */
2794                 context = smb2_find_context_vals(req, SMB2_CREATE_EA_BUFFER, 4);
2795                 if (IS_ERR(context)) {
2796                         rc = PTR_ERR(context);
2797                         goto err_out2;
2798                 } else if (context) {
2799                         ea_buf = (struct create_ea_buf_req *)context;
2800                         if (le16_to_cpu(context->DataOffset) +
2801                             le32_to_cpu(context->DataLength) <
2802                             sizeof(struct create_ea_buf_req)) {
2803                                 rc = -EINVAL;
2804                                 goto err_out2;
2805                         }
2806                         if (req->CreateOptions & FILE_NO_EA_KNOWLEDGE_LE) {
2807                                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
2808                                 rc = -EACCES;
2809                                 goto err_out2;
2810                         }
2811                 }
2812
2813                 context = smb2_find_context_vals(req,
2814                                                  SMB2_CREATE_QUERY_MAXIMAL_ACCESS_REQUEST, 4);
2815                 if (IS_ERR(context)) {
2816                         rc = PTR_ERR(context);
2817                         goto err_out2;
2818                 } else if (context) {
2819                         ksmbd_debug(SMB,
2820                                     "get query maximal access context\n");
2821                         maximal_access_ctxt = 1;
2822                 }
2823
2824                 context = smb2_find_context_vals(req,
2825                                                  SMB2_CREATE_TIMEWARP_REQUEST, 4);
2826                 if (IS_ERR(context)) {
2827                         rc = PTR_ERR(context);
2828                         goto err_out2;
2829                 } else if (context) {
2830                         ksmbd_debug(SMB, "get timewarp context\n");
2831                         rc = -EBADF;
2832                         goto err_out2;
2833                 }
2834
2835                 if (tcon->posix_extensions) {
2836                         context = smb2_find_context_vals(req,
2837                                                          SMB2_CREATE_TAG_POSIX, 16);
2838                         if (IS_ERR(context)) {
2839                                 rc = PTR_ERR(context);
2840                                 goto err_out2;
2841                         } else if (context) {
2842                                 struct create_posix *posix =
2843                                         (struct create_posix *)context;
2844                                 if (le16_to_cpu(context->DataOffset) +
2845                                     le32_to_cpu(context->DataLength) <
2846                                     sizeof(struct create_posix) - 4) {
2847                                         rc = -EINVAL;
2848                                         goto err_out2;
2849                                 }
2850                                 ksmbd_debug(SMB, "get posix context\n");
2851
2852                                 posix_mode = le32_to_cpu(posix->Mode);
2853                                 posix_ctxt = 1;
2854                         }
2855                 }
2856         }
2857
2858         if (ksmbd_override_fsids(work)) {
2859                 rc = -ENOMEM;
2860                 goto err_out2;
2861         }
2862
2863         rc = ksmbd_vfs_kern_path_locked(work, name, LOOKUP_NO_SYMLINKS,
2864                                         &parent_path, &path, 1);
2865         if (!rc) {
2866                 file_present = true;
2867
2868                 if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE) {
2869                         /*
2870                          * If file exists with under flags, return access
2871                          * denied error.
2872                          */
2873                         if (req->CreateDisposition == FILE_OVERWRITE_IF_LE ||
2874                             req->CreateDisposition == FILE_OPEN_IF_LE) {
2875                                 rc = -EACCES;
2876                                 goto err_out;
2877                         }
2878
2879                         if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
2880                                 ksmbd_debug(SMB,
2881                                             "User does not have write permission\n");
2882                                 rc = -EACCES;
2883                                 goto err_out;
2884                         }
2885                 } else if (d_is_symlink(path.dentry)) {
2886                         rc = -EACCES;
2887                         goto err_out;
2888                 }
2889
2890                 file_present = true;
2891                 idmap = mnt_idmap(path.mnt);
2892         } else {
2893                 if (rc != -ENOENT)
2894                         goto err_out;
2895                 ksmbd_debug(SMB, "can not get linux path for %s, rc = %d\n",
2896                             name, rc);
2897                 rc = 0;
2898         }
2899
2900         if (stream_name) {
2901                 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) {
2902                         if (s_type == DATA_STREAM) {
2903                                 rc = -EIO;
2904                                 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
2905                         }
2906                 } else {
2907                         if (file_present && S_ISDIR(d_inode(path.dentry)->i_mode) &&
2908                             s_type == DATA_STREAM) {
2909                                 rc = -EIO;
2910                                 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
2911                         }
2912                 }
2913
2914                 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE &&
2915                     req->FileAttributes & FILE_ATTRIBUTE_NORMAL_LE) {
2916                         rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
2917                         rc = -EIO;
2918                 }
2919
2920                 if (rc < 0)
2921                         goto err_out;
2922         }
2923
2924         if (file_present && req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE &&
2925             S_ISDIR(d_inode(path.dentry)->i_mode) &&
2926             !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
2927                 ksmbd_debug(SMB, "open() argument is a directory: %s, %x\n",
2928                             name, req->CreateOptions);
2929                 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
2930                 rc = -EIO;
2931                 goto err_out;
2932         }
2933
2934         if (file_present && (req->CreateOptions & FILE_DIRECTORY_FILE_LE) &&
2935             !(req->CreateDisposition == FILE_CREATE_LE) &&
2936             !S_ISDIR(d_inode(path.dentry)->i_mode)) {
2937                 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
2938                 rc = -EIO;
2939                 goto err_out;
2940         }
2941
2942         if (!stream_name && file_present &&
2943             req->CreateDisposition == FILE_CREATE_LE) {
2944                 rc = -EEXIST;
2945                 goto err_out;
2946         }
2947
2948         daccess = smb_map_generic_desired_access(req->DesiredAccess);
2949
2950         if (file_present && !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
2951                 rc = smb_check_perm_dacl(conn, &path, &daccess,
2952                                          sess->user->uid);
2953                 if (rc)
2954                         goto err_out;
2955         }
2956
2957         if (daccess & FILE_MAXIMAL_ACCESS_LE) {
2958                 if (!file_present) {
2959                         daccess = cpu_to_le32(GENERIC_ALL_FLAGS);
2960                 } else {
2961                         ksmbd_vfs_query_maximal_access(idmap,
2962                                                             path.dentry,
2963                                                             &daccess);
2964                         already_permitted = true;
2965                 }
2966                 maximal_access = daccess;
2967         }
2968
2969         open_flags = smb2_create_open_flags(file_present, daccess,
2970                                             req->CreateDisposition,
2971                                             &may_flags);
2972
2973         if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
2974                 if (open_flags & O_CREAT) {
2975                         ksmbd_debug(SMB,
2976                                     "User does not have write permission\n");
2977                         rc = -EACCES;
2978                         goto err_out;
2979                 }
2980         }
2981
2982         /*create file if not present */
2983         if (!file_present) {
2984                 rc = smb2_creat(work, &parent_path, &path, name, open_flags,
2985                                 posix_mode,
2986                                 req->CreateOptions & FILE_DIRECTORY_FILE_LE);
2987                 if (rc) {
2988                         if (rc == -ENOENT) {
2989                                 rc = -EIO;
2990                                 rsp->hdr.Status = STATUS_OBJECT_PATH_NOT_FOUND;
2991                         }
2992                         goto err_out;
2993                 }
2994
2995                 created = true;
2996                 idmap = mnt_idmap(path.mnt);
2997                 if (ea_buf) {
2998                         if (le32_to_cpu(ea_buf->ccontext.DataLength) <
2999                             sizeof(struct smb2_ea_info)) {
3000                                 rc = -EINVAL;
3001                                 goto err_out;
3002                         }
3003
3004                         rc = smb2_set_ea(&ea_buf->ea,
3005                                          le32_to_cpu(ea_buf->ccontext.DataLength),
3006                                          &path);
3007                         if (rc == -EOPNOTSUPP)
3008                                 rc = 0;
3009                         else if (rc)
3010                                 goto err_out;
3011                 }
3012         } else if (!already_permitted) {
3013                 /* FILE_READ_ATTRIBUTE is allowed without inode_permission,
3014                  * because execute(search) permission on a parent directory,
3015                  * is already granted.
3016                  */
3017                 if (daccess & ~(FILE_READ_ATTRIBUTES_LE | FILE_READ_CONTROL_LE)) {
3018                         rc = inode_permission(idmap,
3019                                               d_inode(path.dentry),
3020                                               may_flags);
3021                         if (rc)
3022                                 goto err_out;
3023
3024                         if ((daccess & FILE_DELETE_LE) ||
3025                             (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
3026                                 rc = inode_permission(idmap,
3027                                                       d_inode(path.dentry->d_parent),
3028                                                       MAY_EXEC | MAY_WRITE);
3029                                 if (rc)
3030                                         goto err_out;
3031                         }
3032                 }
3033         }
3034
3035         rc = ksmbd_query_inode_status(path.dentry->d_parent);
3036         if (rc == KSMBD_INODE_STATUS_PENDING_DELETE) {
3037                 rc = -EBUSY;
3038                 goto err_out;
3039         }
3040
3041         rc = 0;
3042         filp = dentry_open(&path, open_flags, current_cred());
3043         if (IS_ERR(filp)) {
3044                 rc = PTR_ERR(filp);
3045                 pr_err("dentry open for dir failed, rc %d\n", rc);
3046                 goto err_out;
3047         }
3048
3049         if (file_present) {
3050                 if (!(open_flags & O_TRUNC))
3051                         file_info = FILE_OPENED;
3052                 else
3053                         file_info = FILE_OVERWRITTEN;
3054
3055                 if ((req->CreateDisposition & FILE_CREATE_MASK_LE) ==
3056                     FILE_SUPERSEDE_LE)
3057                         file_info = FILE_SUPERSEDED;
3058         } else if (open_flags & O_CREAT) {
3059                 file_info = FILE_CREATED;
3060         }
3061
3062         ksmbd_vfs_set_fadvise(filp, req->CreateOptions);
3063
3064         /* Obtain Volatile-ID */
3065         fp = ksmbd_open_fd(work, filp);
3066         if (IS_ERR(fp)) {
3067                 fput(filp);
3068                 rc = PTR_ERR(fp);
3069                 fp = NULL;
3070                 goto err_out;
3071         }
3072
3073         /* Get Persistent-ID */
3074         ksmbd_open_durable_fd(fp);
3075         if (!has_file_id(fp->persistent_id)) {
3076                 rc = -ENOMEM;
3077                 goto err_out;
3078         }
3079
3080         fp->cdoption = req->CreateDisposition;
3081         fp->daccess = daccess;
3082         fp->saccess = req->ShareAccess;
3083         fp->coption = req->CreateOptions;
3084
3085         /* Set default windows and posix acls if creating new file */
3086         if (created) {
3087                 int posix_acl_rc;
3088                 struct inode *inode = d_inode(path.dentry);
3089
3090                 posix_acl_rc = ksmbd_vfs_inherit_posix_acl(idmap,
3091                                                            &path,
3092                                                            d_inode(path.dentry->d_parent));
3093                 if (posix_acl_rc)
3094                         ksmbd_debug(SMB, "inherit posix acl failed : %d\n", posix_acl_rc);
3095
3096                 if (test_share_config_flag(work->tcon->share_conf,
3097                                            KSMBD_SHARE_FLAG_ACL_XATTR)) {
3098                         rc = smb_inherit_dacl(conn, &path, sess->user->uid,
3099                                               sess->user->gid);
3100                 }
3101
3102                 if (rc) {
3103                         rc = smb2_create_sd_buffer(work, req, &path);
3104                         if (rc) {
3105                                 if (posix_acl_rc)
3106                                         ksmbd_vfs_set_init_posix_acl(idmap,
3107                                                                      &path);
3108
3109                                 if (test_share_config_flag(work->tcon->share_conf,
3110                                                            KSMBD_SHARE_FLAG_ACL_XATTR)) {
3111                                         struct smb_fattr fattr;
3112                                         struct smb_ntsd *pntsd;
3113                                         int pntsd_size, ace_num = 0;
3114
3115                                         ksmbd_acls_fattr(&fattr, idmap, inode);
3116                                         if (fattr.cf_acls)
3117                                                 ace_num = fattr.cf_acls->a_count;
3118                                         if (fattr.cf_dacls)
3119                                                 ace_num += fattr.cf_dacls->a_count;
3120
3121                                         pntsd = kmalloc(sizeof(struct smb_ntsd) +
3122                                                         sizeof(struct smb_sid) * 3 +
3123                                                         sizeof(struct smb_acl) +
3124                                                         sizeof(struct smb_ace) * ace_num * 2,
3125                                                         GFP_KERNEL);
3126                                         if (!pntsd) {
3127                                                 posix_acl_release(fattr.cf_acls);
3128                                                 posix_acl_release(fattr.cf_dacls);
3129                                                 goto err_out;
3130                                         }
3131
3132                                         rc = build_sec_desc(idmap,
3133                                                             pntsd, NULL, 0,
3134                                                             OWNER_SECINFO |
3135                                                             GROUP_SECINFO |
3136                                                             DACL_SECINFO,
3137                                                             &pntsd_size, &fattr);
3138                                         posix_acl_release(fattr.cf_acls);
3139                                         posix_acl_release(fattr.cf_dacls);
3140                                         if (rc) {
3141                                                 kfree(pntsd);
3142                                                 goto err_out;
3143                                         }
3144
3145                                         rc = ksmbd_vfs_set_sd_xattr(conn,
3146                                                                     idmap,
3147                                                                     &path,
3148                                                                     pntsd,
3149                                                                     pntsd_size,
3150                                                                     false);
3151                                         kfree(pntsd);
3152                                         if (rc)
3153                                                 pr_err("failed to store ntacl in xattr : %d\n",
3154                                                        rc);
3155                                 }
3156                         }
3157                 }
3158                 rc = 0;
3159         }
3160
3161         if (stream_name) {
3162                 rc = smb2_set_stream_name_xattr(&path,
3163                                                 fp,
3164                                                 stream_name,
3165                                                 s_type);
3166                 if (rc)
3167                         goto err_out;
3168                 file_info = FILE_CREATED;
3169         }
3170
3171         fp->attrib_only = !(req->DesiredAccess & ~(FILE_READ_ATTRIBUTES_LE |
3172                         FILE_WRITE_ATTRIBUTES_LE | FILE_SYNCHRONIZE_LE));
3173
3174         /* fp should be searchable through ksmbd_inode.m_fp_list
3175          * after daccess, saccess, attrib_only, and stream are
3176          * initialized.
3177          */
3178         write_lock(&fp->f_ci->m_lock);
3179         list_add(&fp->node, &fp->f_ci->m_fp_list);
3180         write_unlock(&fp->f_ci->m_lock);
3181
3182         /* Check delete pending among previous fp before oplock break */
3183         if (ksmbd_inode_pending_delete(fp)) {
3184                 rc = -EBUSY;
3185                 goto err_out;
3186         }
3187
3188         if (file_present || created)
3189                 ksmbd_vfs_kern_path_unlock(&parent_path, &path);
3190
3191         if (!S_ISDIR(file_inode(filp)->i_mode) && open_flags & O_TRUNC &&
3192             !fp->attrib_only && !stream_name) {
3193                 smb_break_all_oplock(work, fp);
3194                 need_truncate = 1;
3195         }
3196
3197         req_op_level = req->RequestedOplockLevel;
3198         if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE)
3199                 lc = parse_lease_state(req, S_ISDIR(file_inode(filp)->i_mode));
3200
3201         share_ret = ksmbd_smb_check_shared_mode(fp->filp, fp);
3202         if (!test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_OPLOCKS) ||
3203             (req_op_level == SMB2_OPLOCK_LEVEL_LEASE &&
3204              !(conn->vals->capabilities & SMB2_GLOBAL_CAP_LEASING))) {
3205                 if (share_ret < 0 && !S_ISDIR(file_inode(fp->filp)->i_mode)) {
3206                         rc = share_ret;
3207                         goto err_out1;
3208                 }
3209         } else {
3210                 if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE) {
3211                         /*
3212                          * Compare parent lease using parent key. If there is no
3213                          * a lease that has same parent key, Send lease break
3214                          * notification.
3215                          */
3216                         smb_send_parent_lease_break_noti(fp, lc);
3217
3218                         req_op_level = smb2_map_lease_to_oplock(lc->req_state);
3219                         ksmbd_debug(SMB,
3220                                     "lease req for(%s) req oplock state 0x%x, lease state 0x%x\n",
3221                                     name, req_op_level, lc->req_state);
3222                         rc = find_same_lease_key(sess, fp->f_ci, lc);
3223                         if (rc)
3224                                 goto err_out1;
3225                 } else if (open_flags == O_RDONLY &&
3226                            (req_op_level == SMB2_OPLOCK_LEVEL_BATCH ||
3227                             req_op_level == SMB2_OPLOCK_LEVEL_EXCLUSIVE))
3228                         req_op_level = SMB2_OPLOCK_LEVEL_II;
3229
3230                 rc = smb_grant_oplock(work, req_op_level,
3231                                       fp->persistent_id, fp,
3232                                       le32_to_cpu(req->hdr.Id.SyncId.TreeId),
3233                                       lc, share_ret);
3234                 if (rc < 0)
3235                         goto err_out1;
3236         }
3237
3238         if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)
3239                 ksmbd_fd_set_delete_on_close(fp, file_info);
3240
3241         if (need_truncate) {
3242                 rc = smb2_create_truncate(&fp->filp->f_path);
3243                 if (rc)
3244                         goto err_out1;
3245         }
3246
3247         if (req->CreateContextsOffset) {
3248                 struct create_alloc_size_req *az_req;
3249
3250                 az_req = (struct create_alloc_size_req *)smb2_find_context_vals(req,
3251                                         SMB2_CREATE_ALLOCATION_SIZE, 4);
3252                 if (IS_ERR(az_req)) {
3253                         rc = PTR_ERR(az_req);
3254                         goto err_out1;
3255                 } else if (az_req) {
3256                         loff_t alloc_size;
3257                         int err;
3258
3259                         if (le16_to_cpu(az_req->ccontext.DataOffset) +
3260                             le32_to_cpu(az_req->ccontext.DataLength) <
3261                             sizeof(struct create_alloc_size_req)) {
3262                                 rc = -EINVAL;
3263                                 goto err_out1;
3264                         }
3265                         alloc_size = le64_to_cpu(az_req->AllocationSize);
3266                         ksmbd_debug(SMB,
3267                                     "request smb2 create allocate size : %llu\n",
3268                                     alloc_size);
3269                         smb_break_all_levII_oplock(work, fp, 1);
3270                         err = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0,
3271                                             alloc_size);
3272                         if (err < 0)
3273                                 ksmbd_debug(SMB,
3274                                             "vfs_fallocate is failed : %d\n",
3275                                             err);
3276                 }
3277
3278                 context = smb2_find_context_vals(req, SMB2_CREATE_QUERY_ON_DISK_ID, 4);
3279                 if (IS_ERR(context)) {
3280                         rc = PTR_ERR(context);
3281                         goto err_out1;
3282                 } else if (context) {
3283                         ksmbd_debug(SMB, "get query on disk id context\n");
3284                         query_disk_id = 1;
3285                 }
3286         }
3287
3288         rc = ksmbd_vfs_getattr(&path, &stat);
3289         if (rc)
3290                 goto err_out1;
3291
3292         if (stat.result_mask & STATX_BTIME)
3293                 fp->create_time = ksmbd_UnixTimeToNT(stat.btime);
3294         else
3295                 fp->create_time = ksmbd_UnixTimeToNT(stat.ctime);
3296         if (req->FileAttributes || fp->f_ci->m_fattr == 0)
3297                 fp->f_ci->m_fattr =
3298                         cpu_to_le32(smb2_get_dos_mode(&stat, le32_to_cpu(req->FileAttributes)));
3299
3300         if (!created)
3301                 smb2_update_xattrs(tcon, &path, fp);
3302         else
3303                 smb2_new_xattrs(tcon, &path, fp);
3304
3305         memcpy(fp->client_guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE);
3306
3307         rsp->StructureSize = cpu_to_le16(89);
3308         rcu_read_lock();
3309         opinfo = rcu_dereference(fp->f_opinfo);
3310         rsp->OplockLevel = opinfo != NULL ? opinfo->level : 0;
3311         rcu_read_unlock();
3312         rsp->Flags = 0;
3313         rsp->CreateAction = cpu_to_le32(file_info);
3314         rsp->CreationTime = cpu_to_le64(fp->create_time);
3315         time = ksmbd_UnixTimeToNT(stat.atime);
3316         rsp->LastAccessTime = cpu_to_le64(time);
3317         time = ksmbd_UnixTimeToNT(stat.mtime);
3318         rsp->LastWriteTime = cpu_to_le64(time);
3319         time = ksmbd_UnixTimeToNT(stat.ctime);
3320         rsp->ChangeTime = cpu_to_le64(time);
3321         rsp->AllocationSize = S_ISDIR(stat.mode) ? 0 :
3322                 cpu_to_le64(stat.blocks << 9);
3323         rsp->EndofFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
3324         rsp->FileAttributes = fp->f_ci->m_fattr;
3325
3326         rsp->Reserved2 = 0;
3327
3328         rsp->PersistentFileId = fp->persistent_id;
3329         rsp->VolatileFileId = fp->volatile_id;
3330
3331         rsp->CreateContextsOffset = 0;
3332         rsp->CreateContextsLength = 0;
3333         iov_len = offsetof(struct smb2_create_rsp, Buffer);
3334
3335         /* If lease is request send lease context response */
3336         if (opinfo && opinfo->is_lease) {
3337                 struct create_context *lease_ccontext;
3338
3339                 ksmbd_debug(SMB, "lease granted on(%s) lease state 0x%x\n",
3340                             name, opinfo->o_lease->state);
3341                 rsp->OplockLevel = SMB2_OPLOCK_LEVEL_LEASE;
3342
3343                 lease_ccontext = (struct create_context *)rsp->Buffer;
3344                 contxt_cnt++;
3345                 create_lease_buf(rsp->Buffer, opinfo->o_lease);
3346                 le32_add_cpu(&rsp->CreateContextsLength,
3347                              conn->vals->create_lease_size);
3348                 iov_len += conn->vals->create_lease_size;
3349                 next_ptr = &lease_ccontext->Next;
3350                 next_off = conn->vals->create_lease_size;
3351         }
3352
3353         if (maximal_access_ctxt) {
3354                 struct create_context *mxac_ccontext;
3355
3356                 if (maximal_access == 0)
3357                         ksmbd_vfs_query_maximal_access(idmap,
3358                                                        path.dentry,
3359                                                        &maximal_access);
3360                 mxac_ccontext = (struct create_context *)(rsp->Buffer +
3361                                 le32_to_cpu(rsp->CreateContextsLength));
3362                 contxt_cnt++;
3363                 create_mxac_rsp_buf(rsp->Buffer +
3364                                 le32_to_cpu(rsp->CreateContextsLength),
3365                                 le32_to_cpu(maximal_access));
3366                 le32_add_cpu(&rsp->CreateContextsLength,
3367                              conn->vals->create_mxac_size);
3368                 iov_len += conn->vals->create_mxac_size;
3369                 if (next_ptr)
3370                         *next_ptr = cpu_to_le32(next_off);
3371                 next_ptr = &mxac_ccontext->Next;
3372                 next_off = conn->vals->create_mxac_size;
3373         }
3374
3375         if (query_disk_id) {
3376                 struct create_context *disk_id_ccontext;
3377
3378                 disk_id_ccontext = (struct create_context *)(rsp->Buffer +
3379                                 le32_to_cpu(rsp->CreateContextsLength));
3380                 contxt_cnt++;
3381                 create_disk_id_rsp_buf(rsp->Buffer +
3382                                 le32_to_cpu(rsp->CreateContextsLength),
3383                                 stat.ino, tcon->id);
3384                 le32_add_cpu(&rsp->CreateContextsLength,
3385                              conn->vals->create_disk_id_size);
3386                 iov_len += conn->vals->create_disk_id_size;
3387                 if (next_ptr)
3388                         *next_ptr = cpu_to_le32(next_off);
3389                 next_ptr = &disk_id_ccontext->Next;
3390                 next_off = conn->vals->create_disk_id_size;
3391         }
3392
3393         if (posix_ctxt) {
3394                 contxt_cnt++;
3395                 create_posix_rsp_buf(rsp->Buffer +
3396                                 le32_to_cpu(rsp->CreateContextsLength),
3397                                 fp);
3398                 le32_add_cpu(&rsp->CreateContextsLength,
3399                              conn->vals->create_posix_size);
3400                 iov_len += conn->vals->create_posix_size;
3401                 if (next_ptr)
3402                         *next_ptr = cpu_to_le32(next_off);
3403         }
3404
3405         if (contxt_cnt > 0) {
3406                 rsp->CreateContextsOffset =
3407                         cpu_to_le32(offsetof(struct smb2_create_rsp, Buffer));
3408         }
3409
3410 err_out:
3411         if (rc && (file_present || created))
3412                 ksmbd_vfs_kern_path_unlock(&parent_path, &path);
3413
3414 err_out1:
3415         ksmbd_revert_fsids(work);
3416
3417 err_out2:
3418         if (!rc) {
3419                 ksmbd_update_fstate(&work->sess->file_table, fp, FP_INITED);
3420                 rc = ksmbd_iov_pin_rsp(work, (void *)rsp, iov_len);
3421         }
3422         if (rc) {
3423                 if (rc == -EINVAL)
3424                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
3425                 else if (rc == -EOPNOTSUPP)
3426                         rsp->hdr.Status = STATUS_NOT_SUPPORTED;
3427                 else if (rc == -EACCES || rc == -ESTALE || rc == -EXDEV)
3428                         rsp->hdr.Status = STATUS_ACCESS_DENIED;
3429                 else if (rc == -ENOENT)
3430                         rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID;
3431                 else if (rc == -EPERM)
3432                         rsp->hdr.Status = STATUS_SHARING_VIOLATION;
3433                 else if (rc == -EBUSY)
3434                         rsp->hdr.Status = STATUS_DELETE_PENDING;
3435                 else if (rc == -EBADF)
3436                         rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
3437                 else if (rc == -ENOEXEC)
3438                         rsp->hdr.Status = STATUS_DUPLICATE_OBJECTID;
3439                 else if (rc == -ENXIO)
3440                         rsp->hdr.Status = STATUS_NO_SUCH_DEVICE;
3441                 else if (rc == -EEXIST)
3442                         rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION;
3443                 else if (rc == -EMFILE)
3444                         rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
3445                 if (!rsp->hdr.Status)
3446                         rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
3447
3448                 if (fp)
3449                         ksmbd_fd_put(work, fp);
3450                 smb2_set_err_rsp(work);
3451                 ksmbd_debug(SMB, "Error response: %x\n", rsp->hdr.Status);
3452         }
3453
3454         kfree(name);
3455         kfree(lc);
3456
3457         return 0;
3458 }
3459
3460 static int readdir_info_level_struct_sz(int info_level)
3461 {
3462         switch (info_level) {
3463         case FILE_FULL_DIRECTORY_INFORMATION:
3464                 return sizeof(struct file_full_directory_info);
3465         case FILE_BOTH_DIRECTORY_INFORMATION:
3466                 return sizeof(struct file_both_directory_info);
3467         case FILE_DIRECTORY_INFORMATION:
3468                 return sizeof(struct file_directory_info);
3469         case FILE_NAMES_INFORMATION:
3470                 return sizeof(struct file_names_info);
3471         case FILEID_FULL_DIRECTORY_INFORMATION:
3472                 return sizeof(struct file_id_full_dir_info);
3473         case FILEID_BOTH_DIRECTORY_INFORMATION:
3474                 return sizeof(struct file_id_both_directory_info);
3475         case SMB_FIND_FILE_POSIX_INFO:
3476                 return sizeof(struct smb2_posix_info);
3477         default:
3478                 return -EOPNOTSUPP;
3479         }
3480 }
3481
3482 static int dentry_name(struct ksmbd_dir_info *d_info, int info_level)
3483 {
3484         switch (info_level) {
3485         case FILE_FULL_DIRECTORY_INFORMATION:
3486         {
3487                 struct file_full_directory_info *ffdinfo;
3488
3489                 ffdinfo = (struct file_full_directory_info *)d_info->rptr;
3490                 d_info->rptr += le32_to_cpu(ffdinfo->NextEntryOffset);
3491                 d_info->name = ffdinfo->FileName;
3492                 d_info->name_len = le32_to_cpu(ffdinfo->FileNameLength);
3493                 return 0;
3494         }
3495         case FILE_BOTH_DIRECTORY_INFORMATION:
3496         {
3497                 struct file_both_directory_info *fbdinfo;
3498
3499                 fbdinfo = (struct file_both_directory_info *)d_info->rptr;
3500                 d_info->rptr += le32_to_cpu(fbdinfo->NextEntryOffset);
3501                 d_info->name = fbdinfo->FileName;
3502                 d_info->name_len = le32_to_cpu(fbdinfo->FileNameLength);
3503                 return 0;
3504         }
3505         case FILE_DIRECTORY_INFORMATION:
3506         {
3507                 struct file_directory_info *fdinfo;
3508
3509                 fdinfo = (struct file_directory_info *)d_info->rptr;
3510                 d_info->rptr += le32_to_cpu(fdinfo->NextEntryOffset);
3511                 d_info->name = fdinfo->FileName;
3512                 d_info->name_len = le32_to_cpu(fdinfo->FileNameLength);
3513                 return 0;
3514         }
3515         case FILE_NAMES_INFORMATION:
3516         {
3517                 struct file_names_info *fninfo;
3518
3519                 fninfo = (struct file_names_info *)d_info->rptr;
3520                 d_info->rptr += le32_to_cpu(fninfo->NextEntryOffset);
3521                 d_info->name = fninfo->FileName;
3522                 d_info->name_len = le32_to_cpu(fninfo->FileNameLength);
3523                 return 0;
3524         }
3525         case FILEID_FULL_DIRECTORY_INFORMATION:
3526         {
3527                 struct file_id_full_dir_info *dinfo;
3528
3529                 dinfo = (struct file_id_full_dir_info *)d_info->rptr;
3530                 d_info->rptr += le32_to_cpu(dinfo->NextEntryOffset);
3531                 d_info->name = dinfo->FileName;
3532                 d_info->name_len = le32_to_cpu(dinfo->FileNameLength);
3533                 return 0;
3534         }
3535         case FILEID_BOTH_DIRECTORY_INFORMATION:
3536         {
3537                 struct file_id_both_directory_info *fibdinfo;
3538
3539                 fibdinfo = (struct file_id_both_directory_info *)d_info->rptr;
3540                 d_info->rptr += le32_to_cpu(fibdinfo->NextEntryOffset);
3541                 d_info->name = fibdinfo->FileName;
3542                 d_info->name_len = le32_to_cpu(fibdinfo->FileNameLength);
3543                 return 0;
3544         }
3545         case SMB_FIND_FILE_POSIX_INFO:
3546         {
3547                 struct smb2_posix_info *posix_info;
3548
3549                 posix_info = (struct smb2_posix_info *)d_info->rptr;
3550                 d_info->rptr += le32_to_cpu(posix_info->NextEntryOffset);
3551                 d_info->name = posix_info->name;
3552                 d_info->name_len = le32_to_cpu(posix_info->name_len);
3553                 return 0;
3554         }
3555         default:
3556                 return -EINVAL;
3557         }
3558 }
3559
3560 /**
3561  * smb2_populate_readdir_entry() - encode directory entry in smb2 response
3562  * buffer
3563  * @conn:       connection instance
3564  * @info_level: smb information level
3565  * @d_info:     structure included variables for query dir
3566  * @ksmbd_kstat:        ksmbd wrapper of dirent stat information
3567  *
3568  * if directory has many entries, find first can't read it fully.
3569  * find next might be called multiple times to read remaining dir entries
3570  *
3571  * Return:      0 on success, otherwise error
3572  */
3573 static int smb2_populate_readdir_entry(struct ksmbd_conn *conn, int info_level,
3574                                        struct ksmbd_dir_info *d_info,
3575                                        struct ksmbd_kstat *ksmbd_kstat)
3576 {
3577         int next_entry_offset = 0;
3578         char *conv_name;
3579         int conv_len;
3580         void *kstat;
3581         int struct_sz, rc = 0;
3582
3583         conv_name = ksmbd_convert_dir_info_name(d_info,
3584                                                 conn->local_nls,
3585                                                 &conv_len);
3586         if (!conv_name)
3587                 return -ENOMEM;
3588
3589         /* Somehow the name has only terminating NULL bytes */
3590         if (conv_len < 0) {
3591                 rc = -EINVAL;
3592                 goto free_conv_name;
3593         }
3594
3595         struct_sz = readdir_info_level_struct_sz(info_level) + conv_len;
3596         next_entry_offset = ALIGN(struct_sz, KSMBD_DIR_INFO_ALIGNMENT);
3597         d_info->last_entry_off_align = next_entry_offset - struct_sz;
3598
3599         if (next_entry_offset > d_info->out_buf_len) {
3600                 d_info->out_buf_len = 0;
3601                 rc = -ENOSPC;
3602                 goto free_conv_name;
3603         }
3604
3605         kstat = d_info->wptr;
3606         if (info_level != FILE_NAMES_INFORMATION)
3607                 kstat = ksmbd_vfs_init_kstat(&d_info->wptr, ksmbd_kstat);
3608
3609         switch (info_level) {
3610         case FILE_FULL_DIRECTORY_INFORMATION:
3611         {
3612                 struct file_full_directory_info *ffdinfo;
3613
3614                 ffdinfo = (struct file_full_directory_info *)kstat;
3615                 ffdinfo->FileNameLength = cpu_to_le32(conv_len);
3616                 ffdinfo->EaSize =
3617                         smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3618                 if (ffdinfo->EaSize)
3619                         ffdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3620                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3621                         ffdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3622                 memcpy(ffdinfo->FileName, conv_name, conv_len);
3623                 ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3624                 break;
3625         }
3626         case FILE_BOTH_DIRECTORY_INFORMATION:
3627         {
3628                 struct file_both_directory_info *fbdinfo;
3629
3630                 fbdinfo = (struct file_both_directory_info *)kstat;
3631                 fbdinfo->FileNameLength = cpu_to_le32(conv_len);
3632                 fbdinfo->EaSize =
3633                         smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3634                 if (fbdinfo->EaSize)
3635                         fbdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3636                 fbdinfo->ShortNameLength = 0;
3637                 fbdinfo->Reserved = 0;
3638                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3639                         fbdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3640                 memcpy(fbdinfo->FileName, conv_name, conv_len);
3641                 fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3642                 break;
3643         }
3644         case FILE_DIRECTORY_INFORMATION:
3645         {
3646                 struct file_directory_info *fdinfo;
3647
3648                 fdinfo = (struct file_directory_info *)kstat;
3649                 fdinfo->FileNameLength = cpu_to_le32(conv_len);
3650                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3651                         fdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3652                 memcpy(fdinfo->FileName, conv_name, conv_len);
3653                 fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3654                 break;
3655         }
3656         case FILE_NAMES_INFORMATION:
3657         {
3658                 struct file_names_info *fninfo;
3659
3660                 fninfo = (struct file_names_info *)kstat;
3661                 fninfo->FileNameLength = cpu_to_le32(conv_len);
3662                 memcpy(fninfo->FileName, conv_name, conv_len);
3663                 fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3664                 break;
3665         }
3666         case FILEID_FULL_DIRECTORY_INFORMATION:
3667         {
3668                 struct file_id_full_dir_info *dinfo;
3669
3670                 dinfo = (struct file_id_full_dir_info *)kstat;
3671                 dinfo->FileNameLength = cpu_to_le32(conv_len);
3672                 dinfo->EaSize =
3673                         smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3674                 if (dinfo->EaSize)
3675                         dinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3676                 dinfo->Reserved = 0;
3677                 dinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino);
3678                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3679                         dinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3680                 memcpy(dinfo->FileName, conv_name, conv_len);
3681                 dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3682                 break;
3683         }
3684         case FILEID_BOTH_DIRECTORY_INFORMATION:
3685         {
3686                 struct file_id_both_directory_info *fibdinfo;
3687
3688                 fibdinfo = (struct file_id_both_directory_info *)kstat;
3689                 fibdinfo->FileNameLength = cpu_to_le32(conv_len);
3690                 fibdinfo->EaSize =
3691                         smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3692                 if (fibdinfo->EaSize)
3693                         fibdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3694                 fibdinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino);
3695                 fibdinfo->ShortNameLength = 0;
3696                 fibdinfo->Reserved = 0;
3697                 fibdinfo->Reserved2 = cpu_to_le16(0);
3698                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3699                         fibdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3700                 memcpy(fibdinfo->FileName, conv_name, conv_len);
3701                 fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3702                 break;
3703         }
3704         case SMB_FIND_FILE_POSIX_INFO:
3705         {
3706                 struct smb2_posix_info *posix_info;
3707                 u64 time;
3708
3709                 posix_info = (struct smb2_posix_info *)kstat;
3710                 posix_info->Ignored = 0;
3711                 posix_info->CreationTime = cpu_to_le64(ksmbd_kstat->create_time);
3712                 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->ctime);
3713                 posix_info->ChangeTime = cpu_to_le64(time);
3714                 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->atime);
3715                 posix_info->LastAccessTime = cpu_to_le64(time);
3716                 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->mtime);
3717                 posix_info->LastWriteTime = cpu_to_le64(time);
3718                 posix_info->EndOfFile = cpu_to_le64(ksmbd_kstat->kstat->size);
3719                 posix_info->AllocationSize = cpu_to_le64(ksmbd_kstat->kstat->blocks << 9);
3720                 posix_info->DeviceId = cpu_to_le32(ksmbd_kstat->kstat->rdev);
3721                 posix_info->HardLinks = cpu_to_le32(ksmbd_kstat->kstat->nlink);
3722                 posix_info->Mode = cpu_to_le32(ksmbd_kstat->kstat->mode & 0777);
3723                 posix_info->Inode = cpu_to_le64(ksmbd_kstat->kstat->ino);
3724                 posix_info->DosAttributes =
3725                         S_ISDIR(ksmbd_kstat->kstat->mode) ?
3726                                 FILE_ATTRIBUTE_DIRECTORY_LE : FILE_ATTRIBUTE_ARCHIVE_LE;
3727                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3728                         posix_info->DosAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3729                 /*
3730                  * SidBuffer(32) contain two sids(Domain sid(16), UNIX group sid(16)).
3731                  * UNIX sid(16) = revision(1) + num_subauth(1) + authority(6) +
3732                  *                sub_auth(4 * 1(num_subauth)) + RID(4).
3733                  */
3734                 id_to_sid(from_kuid_munged(&init_user_ns, ksmbd_kstat->kstat->uid),
3735                           SIDUNIX_USER, (struct smb_sid *)&posix_info->SidBuffer[0]);
3736                 id_to_sid(from_kgid_munged(&init_user_ns, ksmbd_kstat->kstat->gid),
3737                           SIDUNIX_GROUP, (struct smb_sid *)&posix_info->SidBuffer[16]);
3738                 memcpy(posix_info->name, conv_name, conv_len);
3739                 posix_info->name_len = cpu_to_le32(conv_len);
3740                 posix_info->NextEntryOffset = cpu_to_le32(next_entry_offset);
3741                 break;
3742         }
3743
3744         } /* switch (info_level) */
3745
3746         d_info->last_entry_offset = d_info->data_count;
3747         d_info->data_count += next_entry_offset;
3748         d_info->out_buf_len -= next_entry_offset;
3749         d_info->wptr += next_entry_offset;
3750
3751         ksmbd_debug(SMB,
3752                     "info_level : %d, buf_len :%d, next_offset : %d, data_count : %d\n",
3753                     info_level, d_info->out_buf_len,
3754                     next_entry_offset, d_info->data_count);
3755
3756 free_conv_name:
3757         kfree(conv_name);
3758         return rc;
3759 }
3760
3761 struct smb2_query_dir_private {
3762         struct ksmbd_work       *work;
3763         char                    *search_pattern;
3764         struct ksmbd_file       *dir_fp;
3765
3766         struct ksmbd_dir_info   *d_info;
3767         int                     info_level;
3768 };
3769
3770 static void lock_dir(struct ksmbd_file *dir_fp)
3771 {
3772         struct dentry *dir = dir_fp->filp->f_path.dentry;
3773
3774         inode_lock_nested(d_inode(dir), I_MUTEX_PARENT);
3775 }
3776
3777 static void unlock_dir(struct ksmbd_file *dir_fp)
3778 {
3779         struct dentry *dir = dir_fp->filp->f_path.dentry;
3780
3781         inode_unlock(d_inode(dir));
3782 }
3783
3784 static int process_query_dir_entries(struct smb2_query_dir_private *priv)
3785 {
3786         struct mnt_idmap        *idmap = file_mnt_idmap(priv->dir_fp->filp);
3787         struct kstat            kstat;
3788         struct ksmbd_kstat      ksmbd_kstat;
3789         int                     rc;
3790         int                     i;
3791
3792         for (i = 0; i < priv->d_info->num_entry; i++) {
3793                 struct dentry *dent;
3794
3795                 if (dentry_name(priv->d_info, priv->info_level))
3796                         return -EINVAL;
3797
3798                 lock_dir(priv->dir_fp);
3799                 dent = lookup_one(idmap, priv->d_info->name,
3800                                   priv->dir_fp->filp->f_path.dentry,
3801                                   priv->d_info->name_len);
3802                 unlock_dir(priv->dir_fp);
3803
3804                 if (IS_ERR(dent)) {
3805                         ksmbd_debug(SMB, "Cannot lookup `%s' [%ld]\n",
3806                                     priv->d_info->name,
3807                                     PTR_ERR(dent));
3808                         continue;
3809                 }
3810                 if (unlikely(d_is_negative(dent))) {
3811                         dput(dent);
3812                         ksmbd_debug(SMB, "Negative dentry `%s'\n",
3813                                     priv->d_info->name);
3814                         continue;
3815                 }
3816
3817                 ksmbd_kstat.kstat = &kstat;
3818                 if (priv->info_level != FILE_NAMES_INFORMATION)
3819                         ksmbd_vfs_fill_dentry_attrs(priv->work,
3820                                                     idmap,
3821                                                     dent,
3822                                                     &ksmbd_kstat);
3823
3824                 rc = smb2_populate_readdir_entry(priv->work->conn,
3825                                                  priv->info_level,
3826                                                  priv->d_info,
3827                                                  &ksmbd_kstat);
3828                 dput(dent);
3829                 if (rc)
3830                         return rc;
3831         }
3832         return 0;
3833 }
3834
3835 static int reserve_populate_dentry(struct ksmbd_dir_info *d_info,
3836                                    int info_level)
3837 {
3838         int struct_sz;
3839         int conv_len;
3840         int next_entry_offset;
3841
3842         struct_sz = readdir_info_level_struct_sz(info_level);
3843         if (struct_sz == -EOPNOTSUPP)
3844                 return -EOPNOTSUPP;
3845
3846         conv_len = (d_info->name_len + 1) * 2;
3847         next_entry_offset = ALIGN(struct_sz + conv_len,
3848                                   KSMBD_DIR_INFO_ALIGNMENT);
3849
3850         if (next_entry_offset > d_info->out_buf_len) {
3851                 d_info->out_buf_len = 0;
3852                 return -ENOSPC;
3853         }
3854
3855         switch (info_level) {
3856         case FILE_FULL_DIRECTORY_INFORMATION:
3857         {
3858                 struct file_full_directory_info *ffdinfo;
3859
3860                 ffdinfo = (struct file_full_directory_info *)d_info->wptr;
3861                 memcpy(ffdinfo->FileName, d_info->name, d_info->name_len);
3862                 ffdinfo->FileName[d_info->name_len] = 0x00;
3863                 ffdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3864                 ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3865                 break;
3866         }
3867         case FILE_BOTH_DIRECTORY_INFORMATION:
3868         {
3869                 struct file_both_directory_info *fbdinfo;
3870
3871                 fbdinfo = (struct file_both_directory_info *)d_info->wptr;
3872                 memcpy(fbdinfo->FileName, d_info->name, d_info->name_len);
3873                 fbdinfo->FileName[d_info->name_len] = 0x00;
3874                 fbdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3875                 fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3876                 break;
3877         }
3878         case FILE_DIRECTORY_INFORMATION:
3879         {
3880                 struct file_directory_info *fdinfo;
3881
3882                 fdinfo = (struct file_directory_info *)d_info->wptr;
3883                 memcpy(fdinfo->FileName, d_info->name, d_info->name_len);
3884                 fdinfo->FileName[d_info->name_len] = 0x00;
3885                 fdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3886                 fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3887                 break;
3888         }
3889         case FILE_NAMES_INFORMATION:
3890         {
3891                 struct file_names_info *fninfo;
3892
3893                 fninfo = (struct file_names_info *)d_info->wptr;
3894                 memcpy(fninfo->FileName, d_info->name, d_info->name_len);
3895                 fninfo->FileName[d_info->name_len] = 0x00;
3896                 fninfo->FileNameLength = cpu_to_le32(d_info->name_len);
3897                 fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3898                 break;
3899         }
3900         case FILEID_FULL_DIRECTORY_INFORMATION:
3901         {
3902                 struct file_id_full_dir_info *dinfo;
3903
3904                 dinfo = (struct file_id_full_dir_info *)d_info->wptr;
3905                 memcpy(dinfo->FileName, d_info->name, d_info->name_len);
3906                 dinfo->FileName[d_info->name_len] = 0x00;
3907                 dinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3908                 dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3909                 break;
3910         }
3911         case FILEID_BOTH_DIRECTORY_INFORMATION:
3912         {
3913                 struct file_id_both_directory_info *fibdinfo;
3914
3915                 fibdinfo = (struct file_id_both_directory_info *)d_info->wptr;
3916                 memcpy(fibdinfo->FileName, d_info->name, d_info->name_len);
3917                 fibdinfo->FileName[d_info->name_len] = 0x00;
3918                 fibdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3919                 fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3920                 break;
3921         }
3922         case SMB_FIND_FILE_POSIX_INFO:
3923         {
3924                 struct smb2_posix_info *posix_info;
3925
3926                 posix_info = (struct smb2_posix_info *)d_info->wptr;
3927                 memcpy(posix_info->name, d_info->name, d_info->name_len);
3928                 posix_info->name[d_info->name_len] = 0x00;
3929                 posix_info->name_len = cpu_to_le32(d_info->name_len);
3930                 posix_info->NextEntryOffset =
3931                         cpu_to_le32(next_entry_offset);
3932                 break;
3933         }
3934         } /* switch (info_level) */
3935
3936         d_info->num_entry++;
3937         d_info->out_buf_len -= next_entry_offset;
3938         d_info->wptr += next_entry_offset;
3939         return 0;
3940 }
3941
3942 static bool __query_dir(struct dir_context *ctx, const char *name, int namlen,
3943                        loff_t offset, u64 ino, unsigned int d_type)
3944 {
3945         struct ksmbd_readdir_data       *buf;
3946         struct smb2_query_dir_private   *priv;
3947         struct ksmbd_dir_info           *d_info;
3948         int                             rc;
3949
3950         buf     = container_of(ctx, struct ksmbd_readdir_data, ctx);
3951         priv    = buf->private;
3952         d_info  = priv->d_info;
3953
3954         /* dot and dotdot entries are already reserved */
3955         if (!strcmp(".", name) || !strcmp("..", name))
3956                 return true;
3957         if (ksmbd_share_veto_filename(priv->work->tcon->share_conf, name))
3958                 return true;
3959         if (!match_pattern(name, namlen, priv->search_pattern))
3960                 return true;
3961
3962         d_info->name            = name;
3963         d_info->name_len        = namlen;
3964         rc = reserve_populate_dentry(d_info, priv->info_level);
3965         if (rc)
3966                 return false;
3967         if (d_info->flags & SMB2_RETURN_SINGLE_ENTRY)
3968                 d_info->out_buf_len = 0;
3969         return true;
3970 }
3971
3972 static int verify_info_level(int info_level)
3973 {
3974         switch (info_level) {
3975         case FILE_FULL_DIRECTORY_INFORMATION:
3976         case FILE_BOTH_DIRECTORY_INFORMATION:
3977         case FILE_DIRECTORY_INFORMATION:
3978         case FILE_NAMES_INFORMATION:
3979         case FILEID_FULL_DIRECTORY_INFORMATION:
3980         case FILEID_BOTH_DIRECTORY_INFORMATION:
3981         case SMB_FIND_FILE_POSIX_INFO:
3982                 break;
3983         default:
3984                 return -EOPNOTSUPP;
3985         }
3986
3987         return 0;
3988 }
3989
3990 static int smb2_resp_buf_len(struct ksmbd_work *work, unsigned short hdr2_len)
3991 {
3992         int free_len;
3993
3994         free_len = (int)(work->response_sz -
3995                 (get_rfc1002_len(work->response_buf) + 4)) - hdr2_len;
3996         return free_len;
3997 }
3998
3999 static int smb2_calc_max_out_buf_len(struct ksmbd_work *work,
4000                                      unsigned short hdr2_len,
4001                                      unsigned int out_buf_len)
4002 {
4003         int free_len;
4004
4005         if (out_buf_len > work->conn->vals->max_trans_size)
4006                 return -EINVAL;
4007
4008         free_len = smb2_resp_buf_len(work, hdr2_len);
4009         if (free_len < 0)
4010                 return -EINVAL;
4011
4012         return min_t(int, out_buf_len, free_len);
4013 }
4014
4015 int smb2_query_dir(struct ksmbd_work *work)
4016 {
4017         struct ksmbd_conn *conn = work->conn;
4018         struct smb2_query_directory_req *req;
4019         struct smb2_query_directory_rsp *rsp;
4020         struct ksmbd_share_config *share = work->tcon->share_conf;
4021         struct ksmbd_file *dir_fp = NULL;
4022         struct ksmbd_dir_info d_info;
4023         int rc = 0;
4024         char *srch_ptr = NULL;
4025         unsigned char srch_flag;
4026         int buffer_sz;
4027         struct smb2_query_dir_private query_dir_private = {NULL, };
4028
4029         WORK_BUFFERS(work, req, rsp);
4030
4031         if (ksmbd_override_fsids(work)) {
4032                 rsp->hdr.Status = STATUS_NO_MEMORY;
4033                 smb2_set_err_rsp(work);
4034                 return -ENOMEM;
4035         }
4036
4037         rc = verify_info_level(req->FileInformationClass);
4038         if (rc) {
4039                 rc = -EFAULT;
4040                 goto err_out2;
4041         }
4042
4043         dir_fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
4044         if (!dir_fp) {
4045                 rc = -EBADF;
4046                 goto err_out2;
4047         }
4048
4049         if (!(dir_fp->daccess & FILE_LIST_DIRECTORY_LE) ||
4050             inode_permission(file_mnt_idmap(dir_fp->filp),
4051                              file_inode(dir_fp->filp),
4052                              MAY_READ | MAY_EXEC)) {
4053                 pr_err("no right to enumerate directory (%pD)\n", dir_fp->filp);
4054                 rc = -EACCES;
4055                 goto err_out2;
4056         }
4057
4058         if (!S_ISDIR(file_inode(dir_fp->filp)->i_mode)) {
4059                 pr_err("can't do query dir for a file\n");
4060                 rc = -EINVAL;
4061                 goto err_out2;
4062         }
4063
4064         srch_flag = req->Flags;
4065         srch_ptr = smb_strndup_from_utf16(req->Buffer,
4066                                           le16_to_cpu(req->FileNameLength), 1,
4067                                           conn->local_nls);
4068         if (IS_ERR(srch_ptr)) {
4069                 ksmbd_debug(SMB, "Search Pattern not found\n");
4070                 rc = -EINVAL;
4071                 goto err_out2;
4072         } else {
4073                 ksmbd_debug(SMB, "Search pattern is %s\n", srch_ptr);
4074         }
4075
4076         if (srch_flag & SMB2_REOPEN || srch_flag & SMB2_RESTART_SCANS) {
4077                 ksmbd_debug(SMB, "Restart directory scan\n");
4078                 generic_file_llseek(dir_fp->filp, 0, SEEK_SET);
4079         }
4080
4081         memset(&d_info, 0, sizeof(struct ksmbd_dir_info));
4082         d_info.wptr = (char *)rsp->Buffer;
4083         d_info.rptr = (char *)rsp->Buffer;
4084         d_info.out_buf_len =
4085                 smb2_calc_max_out_buf_len(work, 8,
4086                                           le32_to_cpu(req->OutputBufferLength));
4087         if (d_info.out_buf_len < 0) {
4088                 rc = -EINVAL;
4089                 goto err_out;
4090         }
4091         d_info.flags = srch_flag;
4092
4093         /*
4094          * reserve dot and dotdot entries in head of buffer
4095          * in first response
4096          */
4097         rc = ksmbd_populate_dot_dotdot_entries(work, req->FileInformationClass,
4098                                                dir_fp, &d_info, srch_ptr,
4099                                                smb2_populate_readdir_entry);
4100         if (rc == -ENOSPC)
4101                 rc = 0;
4102         else if (rc)
4103                 goto err_out;
4104
4105         if (test_share_config_flag(share, KSMBD_SHARE_FLAG_HIDE_DOT_FILES))
4106                 d_info.hide_dot_file = true;
4107
4108         buffer_sz                               = d_info.out_buf_len;
4109         d_info.rptr                             = d_info.wptr;
4110         query_dir_private.work                  = work;
4111         query_dir_private.search_pattern        = srch_ptr;
4112         query_dir_private.dir_fp                = dir_fp;
4113         query_dir_private.d_info                = &d_info;
4114         query_dir_private.info_level            = req->FileInformationClass;
4115         dir_fp->readdir_data.private            = &query_dir_private;
4116         set_ctx_actor(&dir_fp->readdir_data.ctx, __query_dir);
4117
4118         rc = iterate_dir(dir_fp->filp, &dir_fp->readdir_data.ctx);
4119         /*
4120          * req->OutputBufferLength is too small to contain even one entry.
4121          * In this case, it immediately returns OutputBufferLength 0 to client.
4122          */
4123         if (!d_info.out_buf_len && !d_info.num_entry)
4124                 goto no_buf_len;
4125         if (rc > 0 || rc == -ENOSPC)
4126                 rc = 0;
4127         else if (rc)
4128                 goto err_out;
4129
4130         d_info.wptr = d_info.rptr;
4131         d_info.out_buf_len = buffer_sz;
4132         rc = process_query_dir_entries(&query_dir_private);
4133         if (rc)
4134                 goto err_out;
4135
4136         if (!d_info.data_count && d_info.out_buf_len >= 0) {
4137                 if (srch_flag & SMB2_RETURN_SINGLE_ENTRY && !is_asterisk(srch_ptr)) {
4138                         rsp->hdr.Status = STATUS_NO_SUCH_FILE;
4139                 } else {
4140                         dir_fp->dot_dotdot[0] = dir_fp->dot_dotdot[1] = 0;
4141                         rsp->hdr.Status = STATUS_NO_MORE_FILES;
4142                 }
4143                 rsp->StructureSize = cpu_to_le16(9);
4144                 rsp->OutputBufferOffset = cpu_to_le16(0);
4145                 rsp->OutputBufferLength = cpu_to_le32(0);
4146                 rsp->Buffer[0] = 0;
4147                 rc = ksmbd_iov_pin_rsp(work, (void *)rsp,
4148                                        sizeof(struct smb2_query_directory_rsp));
4149                 if (rc)
4150                         goto err_out;
4151         } else {
4152 no_buf_len:
4153                 ((struct file_directory_info *)
4154                 ((char *)rsp->Buffer + d_info.last_entry_offset))
4155                 ->NextEntryOffset = 0;
4156                 if (d_info.data_count >= d_info.last_entry_off_align)
4157                         d_info.data_count -= d_info.last_entry_off_align;
4158
4159                 rsp->StructureSize = cpu_to_le16(9);
4160                 rsp->OutputBufferOffset = cpu_to_le16(72);
4161                 rsp->OutputBufferLength = cpu_to_le32(d_info.data_count);
4162                 rc = ksmbd_iov_pin_rsp(work, (void *)rsp,
4163                                        offsetof(struct smb2_query_directory_rsp, Buffer) +
4164                                        d_info.data_count);
4165                 if (rc)
4166                         goto err_out;
4167         }
4168
4169         kfree(srch_ptr);
4170         ksmbd_fd_put(work, dir_fp);
4171         ksmbd_revert_fsids(work);
4172         return 0;
4173
4174 err_out:
4175         pr_err("error while processing smb2 query dir rc = %d\n", rc);
4176         kfree(srch_ptr);
4177
4178 err_out2:
4179         if (rc == -EINVAL)
4180                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
4181         else if (rc == -EACCES)
4182                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
4183         else if (rc == -ENOENT)
4184                 rsp->hdr.Status = STATUS_NO_SUCH_FILE;
4185         else if (rc == -EBADF)
4186                 rsp->hdr.Status = STATUS_FILE_CLOSED;
4187         else if (rc == -ENOMEM)
4188                 rsp->hdr.Status = STATUS_NO_MEMORY;
4189         else if (rc == -EFAULT)
4190                 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
4191         else if (rc == -EIO)
4192                 rsp->hdr.Status = STATUS_FILE_CORRUPT_ERROR;
4193         if (!rsp->hdr.Status)
4194                 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
4195
4196         smb2_set_err_rsp(work);
4197         ksmbd_fd_put(work, dir_fp);
4198         ksmbd_revert_fsids(work);
4199         return 0;
4200 }
4201
4202 /**
4203  * buffer_check_err() - helper function to check buffer errors
4204  * @reqOutputBufferLength:      max buffer length expected in command response
4205  * @rsp:                query info response buffer contains output buffer length
4206  * @rsp_org:            base response buffer pointer in case of chained response
4207  *
4208  * Return:      0 on success, otherwise error
4209  */
4210 static int buffer_check_err(int reqOutputBufferLength,
4211                             struct smb2_query_info_rsp *rsp,
4212                             void *rsp_org)
4213 {
4214         if (reqOutputBufferLength < le32_to_cpu(rsp->OutputBufferLength)) {
4215                 pr_err("Invalid Buffer Size Requested\n");
4216                 rsp->hdr.Status = STATUS_INFO_LENGTH_MISMATCH;
4217                 *(__be32 *)rsp_org = cpu_to_be32(sizeof(struct smb2_hdr));
4218                 return -EINVAL;
4219         }
4220         return 0;
4221 }
4222
4223 static void get_standard_info_pipe(struct smb2_query_info_rsp *rsp,
4224                                    void *rsp_org)
4225 {
4226         struct smb2_file_standard_info *sinfo;
4227
4228         sinfo = (struct smb2_file_standard_info *)rsp->Buffer;
4229
4230         sinfo->AllocationSize = cpu_to_le64(4096);
4231         sinfo->EndOfFile = cpu_to_le64(0);
4232         sinfo->NumberOfLinks = cpu_to_le32(1);
4233         sinfo->DeletePending = 1;
4234         sinfo->Directory = 0;
4235         rsp->OutputBufferLength =
4236                 cpu_to_le32(sizeof(struct smb2_file_standard_info));
4237 }
4238
4239 static void get_internal_info_pipe(struct smb2_query_info_rsp *rsp, u64 num,
4240                                    void *rsp_org)
4241 {
4242         struct smb2_file_internal_info *file_info;
4243
4244         file_info = (struct smb2_file_internal_info *)rsp->Buffer;
4245
4246         /* any unique number */
4247         file_info->IndexNumber = cpu_to_le64(num | (1ULL << 63));
4248         rsp->OutputBufferLength =
4249                 cpu_to_le32(sizeof(struct smb2_file_internal_info));
4250 }
4251
4252 static int smb2_get_info_file_pipe(struct ksmbd_session *sess,
4253                                    struct smb2_query_info_req *req,
4254                                    struct smb2_query_info_rsp *rsp,
4255                                    void *rsp_org)
4256 {
4257         u64 id;
4258         int rc;
4259
4260         /*
4261          * Windows can sometime send query file info request on
4262          * pipe without opening it, checking error condition here
4263          */
4264         id = req->VolatileFileId;
4265         if (!ksmbd_session_rpc_method(sess, id))
4266                 return -ENOENT;
4267
4268         ksmbd_debug(SMB, "FileInfoClass %u, FileId 0x%llx\n",
4269                     req->FileInfoClass, req->VolatileFileId);
4270
4271         switch (req->FileInfoClass) {
4272         case FILE_STANDARD_INFORMATION:
4273                 get_standard_info_pipe(rsp, rsp_org);
4274                 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
4275                                       rsp, rsp_org);
4276                 break;
4277         case FILE_INTERNAL_INFORMATION:
4278                 get_internal_info_pipe(rsp, id, rsp_org);
4279                 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
4280                                       rsp, rsp_org);
4281                 break;
4282         default:
4283                 ksmbd_debug(SMB, "smb2_info_file_pipe for %u not supported\n",
4284                             req->FileInfoClass);
4285                 rc = -EOPNOTSUPP;
4286         }
4287         return rc;
4288 }
4289
4290 /**
4291  * smb2_get_ea() - handler for smb2 get extended attribute command
4292  * @work:       smb work containing query info command buffer
4293  * @fp:         ksmbd_file pointer
4294  * @req:        get extended attribute request
4295  * @rsp:        response buffer pointer
4296  * @rsp_org:    base response buffer pointer in case of chained response
4297  *
4298  * Return:      0 on success, otherwise error
4299  */
4300 static int smb2_get_ea(struct ksmbd_work *work, struct ksmbd_file *fp,
4301                        struct smb2_query_info_req *req,
4302                        struct smb2_query_info_rsp *rsp, void *rsp_org)
4303 {
4304         struct smb2_ea_info *eainfo, *prev_eainfo;
4305         char *name, *ptr, *xattr_list = NULL, *buf;
4306         int rc, name_len, value_len, xattr_list_len, idx;
4307         ssize_t buf_free_len, alignment_bytes, next_offset, rsp_data_cnt = 0;
4308         struct smb2_ea_info_req *ea_req = NULL;
4309         const struct path *path;
4310         struct mnt_idmap *idmap = file_mnt_idmap(fp->filp);
4311
4312         if (!(fp->daccess & FILE_READ_EA_LE)) {
4313                 pr_err("Not permitted to read ext attr : 0x%x\n",
4314                        fp->daccess);
4315                 return -EACCES;
4316         }
4317
4318         path = &fp->filp->f_path;
4319         /* single EA entry is requested with given user.* name */
4320         if (req->InputBufferLength) {
4321                 if (le32_to_cpu(req->InputBufferLength) <
4322                     sizeof(struct smb2_ea_info_req))
4323                         return -EINVAL;
4324
4325                 ea_req = (struct smb2_ea_info_req *)req->Buffer;
4326         } else {
4327                 /* need to send all EAs, if no specific EA is requested*/
4328                 if (le32_to_cpu(req->Flags) & SL_RETURN_SINGLE_ENTRY)
4329                         ksmbd_debug(SMB,
4330                                     "All EAs are requested but need to send single EA entry in rsp flags 0x%x\n",
4331                                     le32_to_cpu(req->Flags));
4332         }
4333
4334         buf_free_len =
4335                 smb2_calc_max_out_buf_len(work, 8,
4336                                           le32_to_cpu(req->OutputBufferLength));
4337         if (buf_free_len < 0)
4338                 return -EINVAL;
4339
4340         rc = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
4341         if (rc < 0) {
4342                 rsp->hdr.Status = STATUS_INVALID_HANDLE;
4343                 goto out;
4344         } else if (!rc) { /* there is no EA in the file */
4345                 ksmbd_debug(SMB, "no ea data in the file\n");
4346                 goto done;
4347         }
4348         xattr_list_len = rc;
4349
4350         ptr = (char *)rsp->Buffer;
4351         eainfo = (struct smb2_ea_info *)ptr;
4352         prev_eainfo = eainfo;
4353         idx = 0;
4354
4355         while (idx < xattr_list_len) {
4356                 name = xattr_list + idx;
4357                 name_len = strlen(name);
4358
4359                 ksmbd_debug(SMB, "%s, len %d\n", name, name_len);
4360                 idx += name_len + 1;
4361
4362                 /*
4363                  * CIFS does not support EA other than user.* namespace,
4364                  * still keep the framework generic, to list other attrs
4365                  * in future.
4366                  */
4367                 if (strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
4368                         continue;
4369
4370                 if (!strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX,
4371                              STREAM_PREFIX_LEN))
4372                         continue;
4373
4374                 if (req->InputBufferLength &&
4375                     strncmp(&name[XATTR_USER_PREFIX_LEN], ea_req->name,
4376                             ea_req->EaNameLength))
4377                         continue;
4378
4379                 if (!strncmp(&name[XATTR_USER_PREFIX_LEN],
4380                              DOS_ATTRIBUTE_PREFIX, DOS_ATTRIBUTE_PREFIX_LEN))
4381                         continue;
4382
4383                 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
4384                         name_len -= XATTR_USER_PREFIX_LEN;
4385
4386                 ptr = eainfo->name + name_len + 1;
4387                 buf_free_len -= (offsetof(struct smb2_ea_info, name) +
4388                                 name_len + 1);
4389                 /* bailout if xattr can't fit in buf_free_len */
4390                 value_len = ksmbd_vfs_getxattr(idmap, path->dentry,
4391                                                name, &buf);
4392                 if (value_len <= 0) {
4393                         rc = -ENOENT;
4394                         rsp->hdr.Status = STATUS_INVALID_HANDLE;
4395                         goto out;
4396                 }
4397
4398                 buf_free_len -= value_len;
4399                 if (buf_free_len < 0) {
4400                         kfree(buf);
4401                         break;
4402                 }
4403
4404                 memcpy(ptr, buf, value_len);
4405                 kfree(buf);
4406
4407                 ptr += value_len;
4408                 eainfo->Flags = 0;
4409                 eainfo->EaNameLength = name_len;
4410
4411                 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
4412                         memcpy(eainfo->name, &name[XATTR_USER_PREFIX_LEN],
4413                                name_len);
4414                 else
4415                         memcpy(eainfo->name, name, name_len);
4416
4417                 eainfo->name[name_len] = '\0';
4418                 eainfo->EaValueLength = cpu_to_le16(value_len);
4419                 next_offset = offsetof(struct smb2_ea_info, name) +
4420                         name_len + 1 + value_len;
4421
4422                 /* align next xattr entry at 4 byte bundary */
4423                 alignment_bytes = ((next_offset + 3) & ~3) - next_offset;
4424                 if (alignment_bytes) {
4425                         memset(ptr, '\0', alignment_bytes);
4426                         ptr += alignment_bytes;
4427                         next_offset += alignment_bytes;
4428                         buf_free_len -= alignment_bytes;
4429                 }
4430                 eainfo->NextEntryOffset = cpu_to_le32(next_offset);
4431                 prev_eainfo = eainfo;
4432                 eainfo = (struct smb2_ea_info *)ptr;
4433                 rsp_data_cnt += next_offset;
4434
4435                 if (req->InputBufferLength) {
4436                         ksmbd_debug(SMB, "single entry requested\n");
4437                         break;
4438                 }
4439         }
4440
4441         /* no more ea entries */
4442         prev_eainfo->NextEntryOffset = 0;
4443 done:
4444         rc = 0;
4445         if (rsp_data_cnt == 0)
4446                 rsp->hdr.Status = STATUS_NO_EAS_ON_FILE;
4447         rsp->OutputBufferLength = cpu_to_le32(rsp_data_cnt);
4448 out:
4449         kvfree(xattr_list);
4450         return rc;
4451 }
4452
4453 static void get_file_access_info(struct smb2_query_info_rsp *rsp,
4454                                  struct ksmbd_file *fp, void *rsp_org)
4455 {
4456         struct smb2_file_access_info *file_info;
4457
4458         file_info = (struct smb2_file_access_info *)rsp->Buffer;
4459         file_info->AccessFlags = fp->daccess;
4460         rsp->OutputBufferLength =
4461                 cpu_to_le32(sizeof(struct smb2_file_access_info));
4462 }
4463
4464 static int get_file_basic_info(struct smb2_query_info_rsp *rsp,
4465                                struct ksmbd_file *fp, void *rsp_org)
4466 {
4467         struct smb2_file_basic_info *basic_info;
4468         struct kstat stat;
4469         u64 time;
4470
4471         if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4472                 pr_err("no right to read the attributes : 0x%x\n",
4473                        fp->daccess);
4474                 return -EACCES;
4475         }
4476
4477         basic_info = (struct smb2_file_basic_info *)rsp->Buffer;
4478         generic_fillattr(file_mnt_idmap(fp->filp), STATX_BASIC_STATS,
4479                          file_inode(fp->filp), &stat);
4480         basic_info->CreationTime = cpu_to_le64(fp->create_time);
4481         time = ksmbd_UnixTimeToNT(stat.atime);
4482         basic_info->LastAccessTime = cpu_to_le64(time);
4483         time = ksmbd_UnixTimeToNT(stat.mtime);
4484         basic_info->LastWriteTime = cpu_to_le64(time);
4485         time = ksmbd_UnixTimeToNT(stat.ctime);
4486         basic_info->ChangeTime = cpu_to_le64(time);
4487         basic_info->Attributes = fp->f_ci->m_fattr;
4488         basic_info->Pad1 = 0;
4489         rsp->OutputBufferLength =
4490                 cpu_to_le32(sizeof(struct smb2_file_basic_info));
4491         return 0;
4492 }
4493
4494 static void get_file_standard_info(struct smb2_query_info_rsp *rsp,
4495                                    struct ksmbd_file *fp, void *rsp_org)
4496 {
4497         struct smb2_file_standard_info *sinfo;
4498         unsigned int delete_pending;
4499         struct inode *inode;
4500         struct kstat stat;
4501
4502         inode = file_inode(fp->filp);
4503         generic_fillattr(file_mnt_idmap(fp->filp), STATX_BASIC_STATS, inode, &stat);
4504
4505         sinfo = (struct smb2_file_standard_info *)rsp->Buffer;
4506         delete_pending = ksmbd_inode_pending_delete(fp);
4507
4508         sinfo->AllocationSize = cpu_to_le64(inode->i_blocks << 9);
4509         sinfo->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
4510         sinfo->NumberOfLinks = cpu_to_le32(get_nlink(&stat) - delete_pending);
4511         sinfo->DeletePending = delete_pending;
4512         sinfo->Directory = S_ISDIR(stat.mode) ? 1 : 0;
4513         rsp->OutputBufferLength =
4514                 cpu_to_le32(sizeof(struct smb2_file_standard_info));
4515 }
4516
4517 static void get_file_alignment_info(struct smb2_query_info_rsp *rsp,
4518                                     void *rsp_org)
4519 {
4520         struct smb2_file_alignment_info *file_info;
4521
4522         file_info = (struct smb2_file_alignment_info *)rsp->Buffer;
4523         file_info->AlignmentRequirement = 0;
4524         rsp->OutputBufferLength =
4525                 cpu_to_le32(sizeof(struct smb2_file_alignment_info));
4526 }
4527
4528 static int get_file_all_info(struct ksmbd_work *work,
4529                              struct smb2_query_info_rsp *rsp,
4530                              struct ksmbd_file *fp,
4531                              void *rsp_org)
4532 {
4533         struct ksmbd_conn *conn = work->conn;
4534         struct smb2_file_all_info *file_info;
4535         unsigned int delete_pending;
4536         struct inode *inode;
4537         struct kstat stat;
4538         int conv_len;
4539         char *filename;
4540         u64 time;
4541
4542         if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4543                 ksmbd_debug(SMB, "no right to read the attributes : 0x%x\n",
4544                             fp->daccess);
4545                 return -EACCES;
4546         }
4547
4548         filename = convert_to_nt_pathname(work->tcon->share_conf, &fp->filp->f_path);
4549         if (IS_ERR(filename))
4550                 return PTR_ERR(filename);
4551
4552         inode = file_inode(fp->filp);
4553         generic_fillattr(file_mnt_idmap(fp->filp), STATX_BASIC_STATS, inode, &stat);
4554
4555         ksmbd_debug(SMB, "filename = %s\n", filename);
4556         delete_pending = ksmbd_inode_pending_delete(fp);
4557         file_info = (struct smb2_file_all_info *)rsp->Buffer;
4558
4559         file_info->CreationTime = cpu_to_le64(fp->create_time);
4560         time = ksmbd_UnixTimeToNT(stat.atime);
4561         file_info->LastAccessTime = cpu_to_le64(time);
4562         time = ksmbd_UnixTimeToNT(stat.mtime);
4563         file_info->LastWriteTime = cpu_to_le64(time);
4564         time = ksmbd_UnixTimeToNT(stat.ctime);
4565         file_info->ChangeTime = cpu_to_le64(time);
4566         file_info->Attributes = fp->f_ci->m_fattr;
4567         file_info->Pad1 = 0;
4568         file_info->AllocationSize =
4569                 cpu_to_le64(inode->i_blocks << 9);
4570         file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
4571         file_info->NumberOfLinks =
4572                         cpu_to_le32(get_nlink(&stat) - delete_pending);
4573         file_info->DeletePending = delete_pending;
4574         file_info->Directory = S_ISDIR(stat.mode) ? 1 : 0;
4575         file_info->Pad2 = 0;
4576         file_info->IndexNumber = cpu_to_le64(stat.ino);
4577         file_info->EASize = 0;
4578         file_info->AccessFlags = fp->daccess;
4579         file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos);
4580         file_info->Mode = fp->coption;
4581         file_info->AlignmentRequirement = 0;
4582         conv_len = smbConvertToUTF16((__le16 *)file_info->FileName, filename,
4583                                      PATH_MAX, conn->local_nls, 0);
4584         conv_len *= 2;
4585         file_info->FileNameLength = cpu_to_le32(conv_len);
4586         rsp->OutputBufferLength =
4587                 cpu_to_le32(sizeof(struct smb2_file_all_info) + conv_len - 1);
4588         kfree(filename);
4589         return 0;
4590 }
4591
4592 static void get_file_alternate_info(struct ksmbd_work *work,
4593                                     struct smb2_query_info_rsp *rsp,
4594                                     struct ksmbd_file *fp,
4595                                     void *rsp_org)
4596 {
4597         struct ksmbd_conn *conn = work->conn;
4598         struct smb2_file_alt_name_info *file_info;
4599         struct dentry *dentry = fp->filp->f_path.dentry;
4600         int conv_len;
4601
4602         spin_lock(&dentry->d_lock);
4603         file_info = (struct smb2_file_alt_name_info *)rsp->Buffer;
4604         conv_len = ksmbd_extract_shortname(conn,
4605                                            dentry->d_name.name,
4606                                            file_info->FileName);
4607         spin_unlock(&dentry->d_lock);
4608         file_info->FileNameLength = cpu_to_le32(conv_len);
4609         rsp->OutputBufferLength =
4610                 cpu_to_le32(sizeof(struct smb2_file_alt_name_info) + conv_len);
4611 }
4612
4613 static void get_file_stream_info(struct ksmbd_work *work,
4614                                  struct smb2_query_info_rsp *rsp,
4615                                  struct ksmbd_file *fp,
4616                                  void *rsp_org)
4617 {
4618         struct ksmbd_conn *conn = work->conn;
4619         struct smb2_file_stream_info *file_info;
4620         char *stream_name, *xattr_list = NULL, *stream_buf;
4621         struct kstat stat;
4622         const struct path *path = &fp->filp->f_path;
4623         ssize_t xattr_list_len;
4624         int nbytes = 0, streamlen, stream_name_len, next, idx = 0;
4625         int buf_free_len;
4626         struct smb2_query_info_req *req = ksmbd_req_buf_next(work);
4627
4628         generic_fillattr(file_mnt_idmap(fp->filp), STATX_BASIC_STATS,
4629                          file_inode(fp->filp), &stat);
4630         file_info = (struct smb2_file_stream_info *)rsp->Buffer;
4631
4632         buf_free_len =
4633                 smb2_calc_max_out_buf_len(work, 8,
4634                                           le32_to_cpu(req->OutputBufferLength));
4635         if (buf_free_len < 0)
4636                 goto out;
4637
4638         xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
4639         if (xattr_list_len < 0) {
4640                 goto out;
4641         } else if (!xattr_list_len) {
4642                 ksmbd_debug(SMB, "empty xattr in the file\n");
4643                 goto out;
4644         }
4645
4646         while (idx < xattr_list_len) {
4647                 stream_name = xattr_list + idx;
4648                 streamlen = strlen(stream_name);
4649                 idx += streamlen + 1;
4650
4651                 ksmbd_debug(SMB, "%s, len %d\n", stream_name, streamlen);
4652
4653                 if (strncmp(&stream_name[XATTR_USER_PREFIX_LEN],
4654                             STREAM_PREFIX, STREAM_PREFIX_LEN))
4655                         continue;
4656
4657                 stream_name_len = streamlen - (XATTR_USER_PREFIX_LEN +
4658                                 STREAM_PREFIX_LEN);
4659                 streamlen = stream_name_len;
4660
4661                 /* plus : size */
4662                 streamlen += 1;
4663                 stream_buf = kmalloc(streamlen + 1, GFP_KERNEL);
4664                 if (!stream_buf)
4665                         break;
4666
4667                 streamlen = snprintf(stream_buf, streamlen + 1,
4668                                      ":%s", &stream_name[XATTR_NAME_STREAM_LEN]);
4669
4670                 next = sizeof(struct smb2_file_stream_info) + streamlen * 2;
4671                 if (next > buf_free_len) {
4672                         kfree(stream_buf);
4673                         break;
4674                 }
4675
4676                 file_info = (struct smb2_file_stream_info *)&rsp->Buffer[nbytes];
4677                 streamlen  = smbConvertToUTF16((__le16 *)file_info->StreamName,
4678                                                stream_buf, streamlen,
4679                                                conn->local_nls, 0);
4680                 streamlen *= 2;
4681                 kfree(stream_buf);
4682                 file_info->StreamNameLength = cpu_to_le32(streamlen);
4683                 file_info->StreamSize = cpu_to_le64(stream_name_len);
4684                 file_info->StreamAllocationSize = cpu_to_le64(stream_name_len);
4685
4686                 nbytes += next;
4687                 buf_free_len -= next;
4688                 file_info->NextEntryOffset = cpu_to_le32(next);
4689         }
4690
4691 out:
4692         if (!S_ISDIR(stat.mode) &&
4693             buf_free_len >= sizeof(struct smb2_file_stream_info) + 7 * 2) {
4694                 file_info = (struct smb2_file_stream_info *)
4695                         &rsp->Buffer[nbytes];
4696                 streamlen = smbConvertToUTF16((__le16 *)file_info->StreamName,
4697                                               "::$DATA", 7, conn->local_nls, 0);
4698                 streamlen *= 2;
4699                 file_info->StreamNameLength = cpu_to_le32(streamlen);
4700                 file_info->StreamSize = cpu_to_le64(stat.size);
4701                 file_info->StreamAllocationSize = cpu_to_le64(stat.blocks << 9);
4702                 nbytes += sizeof(struct smb2_file_stream_info) + streamlen;
4703         }
4704
4705         /* last entry offset should be 0 */
4706         file_info->NextEntryOffset = 0;
4707         kvfree(xattr_list);
4708
4709         rsp->OutputBufferLength = cpu_to_le32(nbytes);
4710 }
4711
4712 static void get_file_internal_info(struct smb2_query_info_rsp *rsp,
4713                                    struct ksmbd_file *fp, void *rsp_org)
4714 {
4715         struct smb2_file_internal_info *file_info;
4716         struct kstat stat;
4717
4718         generic_fillattr(file_mnt_idmap(fp->filp), STATX_BASIC_STATS,
4719                          file_inode(fp->filp), &stat);
4720         file_info = (struct smb2_file_internal_info *)rsp->Buffer;
4721         file_info->IndexNumber = cpu_to_le64(stat.ino);
4722         rsp->OutputBufferLength =
4723                 cpu_to_le32(sizeof(struct smb2_file_internal_info));
4724 }
4725
4726 static int get_file_network_open_info(struct smb2_query_info_rsp *rsp,
4727                                       struct ksmbd_file *fp, void *rsp_org)
4728 {
4729         struct smb2_file_ntwrk_info *file_info;
4730         struct inode *inode;
4731         struct kstat stat;
4732         u64 time;
4733
4734         if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4735                 pr_err("no right to read the attributes : 0x%x\n",
4736                        fp->daccess);
4737                 return -EACCES;
4738         }
4739
4740         file_info = (struct smb2_file_ntwrk_info *)rsp->Buffer;
4741
4742         inode = file_inode(fp->filp);
4743         generic_fillattr(file_mnt_idmap(fp->filp), STATX_BASIC_STATS, inode, &stat);
4744
4745         file_info->CreationTime = cpu_to_le64(fp->create_time);
4746         time = ksmbd_UnixTimeToNT(stat.atime);
4747         file_info->LastAccessTime = cpu_to_le64(time);
4748         time = ksmbd_UnixTimeToNT(stat.mtime);
4749         file_info->LastWriteTime = cpu_to_le64(time);
4750         time = ksmbd_UnixTimeToNT(stat.ctime);
4751         file_info->ChangeTime = cpu_to_le64(time);
4752         file_info->Attributes = fp->f_ci->m_fattr;
4753         file_info->AllocationSize =
4754                 cpu_to_le64(inode->i_blocks << 9);
4755         file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
4756         file_info->Reserved = cpu_to_le32(0);
4757         rsp->OutputBufferLength =
4758                 cpu_to_le32(sizeof(struct smb2_file_ntwrk_info));
4759         return 0;
4760 }
4761
4762 static void get_file_ea_info(struct smb2_query_info_rsp *rsp, void *rsp_org)
4763 {
4764         struct smb2_file_ea_info *file_info;
4765
4766         file_info = (struct smb2_file_ea_info *)rsp->Buffer;
4767         file_info->EASize = 0;
4768         rsp->OutputBufferLength =
4769                 cpu_to_le32(sizeof(struct smb2_file_ea_info));
4770 }
4771
4772 static void get_file_position_info(struct smb2_query_info_rsp *rsp,
4773                                    struct ksmbd_file *fp, void *rsp_org)
4774 {
4775         struct smb2_file_pos_info *file_info;
4776
4777         file_info = (struct smb2_file_pos_info *)rsp->Buffer;
4778         file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos);
4779         rsp->OutputBufferLength =
4780                 cpu_to_le32(sizeof(struct smb2_file_pos_info));
4781 }
4782
4783 static void get_file_mode_info(struct smb2_query_info_rsp *rsp,
4784                                struct ksmbd_file *fp, void *rsp_org)
4785 {
4786         struct smb2_file_mode_info *file_info;
4787
4788         file_info = (struct smb2_file_mode_info *)rsp->Buffer;
4789         file_info->Mode = fp->coption & FILE_MODE_INFO_MASK;
4790         rsp->OutputBufferLength =
4791                 cpu_to_le32(sizeof(struct smb2_file_mode_info));
4792 }
4793
4794 static void get_file_compression_info(struct smb2_query_info_rsp *rsp,
4795                                       struct ksmbd_file *fp, void *rsp_org)
4796 {
4797         struct smb2_file_comp_info *file_info;
4798         struct kstat stat;
4799
4800         generic_fillattr(file_mnt_idmap(fp->filp), STATX_BASIC_STATS,
4801                          file_inode(fp->filp), &stat);
4802
4803         file_info = (struct smb2_file_comp_info *)rsp->Buffer;
4804         file_info->CompressedFileSize = cpu_to_le64(stat.blocks << 9);
4805         file_info->CompressionFormat = COMPRESSION_FORMAT_NONE;
4806         file_info->CompressionUnitShift = 0;
4807         file_info->ChunkShift = 0;
4808         file_info->ClusterShift = 0;
4809         memset(&file_info->Reserved[0], 0, 3);
4810
4811         rsp->OutputBufferLength =
4812                 cpu_to_le32(sizeof(struct smb2_file_comp_info));
4813 }
4814
4815 static int get_file_attribute_tag_info(struct smb2_query_info_rsp *rsp,
4816                                        struct ksmbd_file *fp, void *rsp_org)
4817 {
4818         struct smb2_file_attr_tag_info *file_info;
4819
4820         if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4821                 pr_err("no right to read the attributes : 0x%x\n",
4822                        fp->daccess);
4823                 return -EACCES;
4824         }
4825
4826         file_info = (struct smb2_file_attr_tag_info *)rsp->Buffer;
4827         file_info->FileAttributes = fp->f_ci->m_fattr;
4828         file_info->ReparseTag = 0;
4829         rsp->OutputBufferLength =
4830                 cpu_to_le32(sizeof(struct smb2_file_attr_tag_info));
4831         return 0;
4832 }
4833
4834 static void find_file_posix_info(struct smb2_query_info_rsp *rsp,
4835                                 struct ksmbd_file *fp, void *rsp_org)
4836 {
4837         struct smb311_posix_qinfo *file_info;
4838         struct inode *inode = file_inode(fp->filp);
4839         struct mnt_idmap *idmap = file_mnt_idmap(fp->filp);
4840         vfsuid_t vfsuid = i_uid_into_vfsuid(idmap, inode);
4841         vfsgid_t vfsgid = i_gid_into_vfsgid(idmap, inode);
4842         u64 time;
4843         int out_buf_len = sizeof(struct smb311_posix_qinfo) + 32;
4844
4845         file_info = (struct smb311_posix_qinfo *)rsp->Buffer;
4846         file_info->CreationTime = cpu_to_le64(fp->create_time);
4847         time = ksmbd_UnixTimeToNT(inode_get_atime(inode));
4848         file_info->LastAccessTime = cpu_to_le64(time);
4849         time = ksmbd_UnixTimeToNT(inode_get_mtime(inode));
4850         file_info->LastWriteTime = cpu_to_le64(time);
4851         time = ksmbd_UnixTimeToNT(inode_get_ctime(inode));
4852         file_info->ChangeTime = cpu_to_le64(time);
4853         file_info->DosAttributes = fp->f_ci->m_fattr;
4854         file_info->Inode = cpu_to_le64(inode->i_ino);
4855         file_info->EndOfFile = cpu_to_le64(inode->i_size);
4856         file_info->AllocationSize = cpu_to_le64(inode->i_blocks << 9);
4857         file_info->HardLinks = cpu_to_le32(inode->i_nlink);
4858         file_info->Mode = cpu_to_le32(inode->i_mode & 0777);
4859         file_info->DeviceId = cpu_to_le32(inode->i_rdev);
4860
4861         /*
4862          * Sids(32) contain two sids(Domain sid(16), UNIX group sid(16)).
4863          * UNIX sid(16) = revision(1) + num_subauth(1) + authority(6) +
4864          *                sub_auth(4 * 1(num_subauth)) + RID(4).
4865          */
4866         id_to_sid(from_kuid_munged(&init_user_ns, vfsuid_into_kuid(vfsuid)),
4867                   SIDUNIX_USER, (struct smb_sid *)&file_info->Sids[0]);
4868         id_to_sid(from_kgid_munged(&init_user_ns, vfsgid_into_kgid(vfsgid)),
4869                   SIDUNIX_GROUP, (struct smb_sid *)&file_info->Sids[16]);
4870
4871         rsp->OutputBufferLength = cpu_to_le32(out_buf_len);
4872 }
4873
4874 static int smb2_get_info_file(struct ksmbd_work *work,
4875                               struct smb2_query_info_req *req,
4876                               struct smb2_query_info_rsp *rsp)
4877 {
4878         struct ksmbd_file *fp;
4879         int fileinfoclass = 0;
4880         int rc = 0;
4881         unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
4882
4883         if (test_share_config_flag(work->tcon->share_conf,
4884                                    KSMBD_SHARE_FLAG_PIPE)) {
4885                 /* smb2 info file called for pipe */
4886                 return smb2_get_info_file_pipe(work->sess, req, rsp,
4887                                                work->response_buf);
4888         }
4889
4890         if (work->next_smb2_rcv_hdr_off) {
4891                 if (!has_file_id(req->VolatileFileId)) {
4892                         ksmbd_debug(SMB, "Compound request set FID = %llu\n",
4893                                     work->compound_fid);
4894                         id = work->compound_fid;
4895                         pid = work->compound_pfid;
4896                 }
4897         }
4898
4899         if (!has_file_id(id)) {
4900                 id = req->VolatileFileId;
4901                 pid = req->PersistentFileId;
4902         }
4903
4904         fp = ksmbd_lookup_fd_slow(work, id, pid);
4905         if (!fp)
4906                 return -ENOENT;
4907
4908         fileinfoclass = req->FileInfoClass;
4909
4910         switch (fileinfoclass) {
4911         case FILE_ACCESS_INFORMATION:
4912                 get_file_access_info(rsp, fp, work->response_buf);
4913                 break;
4914
4915         case FILE_BASIC_INFORMATION:
4916                 rc = get_file_basic_info(rsp, fp, work->response_buf);
4917                 break;
4918
4919         case FILE_STANDARD_INFORMATION:
4920                 get_file_standard_info(rsp, fp, work->response_buf);
4921                 break;
4922
4923         case FILE_ALIGNMENT_INFORMATION:
4924                 get_file_alignment_info(rsp, work->response_buf);
4925                 break;
4926
4927         case FILE_ALL_INFORMATION:
4928                 rc = get_file_all_info(work, rsp, fp, work->response_buf);
4929                 break;
4930
4931         case FILE_ALTERNATE_NAME_INFORMATION:
4932                 get_file_alternate_info(work, rsp, fp, work->response_buf);
4933                 break;
4934
4935         case FILE_STREAM_INFORMATION:
4936                 get_file_stream_info(work, rsp, fp, work->response_buf);
4937                 break;
4938
4939         case FILE_INTERNAL_INFORMATION:
4940                 get_file_internal_info(rsp, fp, work->response_buf);
4941                 break;
4942
4943         case FILE_NETWORK_OPEN_INFORMATION:
4944                 rc = get_file_network_open_info(rsp, fp, work->response_buf);
4945                 break;
4946
4947         case FILE_EA_INFORMATION:
4948                 get_file_ea_info(rsp, work->response_buf);
4949                 break;
4950
4951         case FILE_FULL_EA_INFORMATION:
4952                 rc = smb2_get_ea(work, fp, req, rsp, work->response_buf);
4953                 break;
4954
4955         case FILE_POSITION_INFORMATION:
4956                 get_file_position_info(rsp, fp, work->response_buf);
4957                 break;
4958
4959         case FILE_MODE_INFORMATION:
4960                 get_file_mode_info(rsp, fp, work->response_buf);
4961                 break;
4962
4963         case FILE_COMPRESSION_INFORMATION:
4964                 get_file_compression_info(rsp, fp, work->response_buf);
4965                 break;
4966
4967         case FILE_ATTRIBUTE_TAG_INFORMATION:
4968                 rc = get_file_attribute_tag_info(rsp, fp, work->response_buf);
4969                 break;
4970         case SMB_FIND_FILE_POSIX_INFO:
4971                 if (!work->tcon->posix_extensions) {
4972                         pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n");
4973                         rc = -EOPNOTSUPP;
4974                 } else {
4975                         find_file_posix_info(rsp, fp, work->response_buf);
4976                 }
4977                 break;
4978         default:
4979                 ksmbd_debug(SMB, "fileinfoclass %d not supported yet\n",
4980                             fileinfoclass);
4981                 rc = -EOPNOTSUPP;
4982         }
4983         if (!rc)
4984                 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
4985                                       rsp, work->response_buf);
4986         ksmbd_fd_put(work, fp);
4987         return rc;
4988 }
4989
4990 static int smb2_get_info_filesystem(struct ksmbd_work *work,
4991                                     struct smb2_query_info_req *req,
4992                                     struct smb2_query_info_rsp *rsp)
4993 {
4994         struct ksmbd_session *sess = work->sess;
4995         struct ksmbd_conn *conn = work->conn;
4996         struct ksmbd_share_config *share = work->tcon->share_conf;
4997         int fsinfoclass = 0;
4998         struct kstatfs stfs;
4999         struct path path;
5000         int rc = 0, len;
5001
5002         if (!share->path)
5003                 return -EIO;
5004
5005         rc = kern_path(share->path, LOOKUP_NO_SYMLINKS, &path);
5006         if (rc) {
5007                 pr_err("cannot create vfs path\n");
5008                 return -EIO;
5009         }
5010
5011         rc = vfs_statfs(&path, &stfs);
5012         if (rc) {
5013                 pr_err("cannot do stat of path %s\n", share->path);
5014                 path_put(&path);
5015                 return -EIO;
5016         }
5017
5018         fsinfoclass = req->FileInfoClass;
5019
5020         switch (fsinfoclass) {
5021         case FS_DEVICE_INFORMATION:
5022         {
5023                 struct filesystem_device_info *info;
5024
5025                 info = (struct filesystem_device_info *)rsp->Buffer;
5026
5027                 info->DeviceType = cpu_to_le32(stfs.f_type);
5028                 info->DeviceCharacteristics = cpu_to_le32(0x00000020);
5029                 rsp->OutputBufferLength = cpu_to_le32(8);
5030                 break;
5031         }
5032         case FS_ATTRIBUTE_INFORMATION:
5033         {
5034                 struct filesystem_attribute_info *info;
5035                 size_t sz;
5036
5037                 info = (struct filesystem_attribute_info *)rsp->Buffer;
5038                 info->Attributes = cpu_to_le32(FILE_SUPPORTS_OBJECT_IDS |
5039                                                FILE_PERSISTENT_ACLS |
5040                                                FILE_UNICODE_ON_DISK |
5041                                                FILE_CASE_PRESERVED_NAMES |
5042                                                FILE_CASE_SENSITIVE_SEARCH |
5043                                                FILE_SUPPORTS_BLOCK_REFCOUNTING);
5044
5045                 info->Attributes |= cpu_to_le32(server_conf.share_fake_fscaps);
5046
5047                 if (test_share_config_flag(work->tcon->share_conf,
5048                     KSMBD_SHARE_FLAG_STREAMS))
5049                         info->Attributes |= cpu_to_le32(FILE_NAMED_STREAMS);
5050
5051                 info->MaxPathNameComponentLength = cpu_to_le32(stfs.f_namelen);
5052                 len = smbConvertToUTF16((__le16 *)info->FileSystemName,
5053                                         "NTFS", PATH_MAX, conn->local_nls, 0);
5054                 len = len * 2;
5055                 info->FileSystemNameLen = cpu_to_le32(len);
5056                 sz = sizeof(struct filesystem_attribute_info) - 2 + len;
5057                 rsp->OutputBufferLength = cpu_to_le32(sz);
5058                 break;
5059         }
5060         case FS_VOLUME_INFORMATION:
5061         {
5062                 struct filesystem_vol_info *info;
5063                 size_t sz;
5064                 unsigned int serial_crc = 0;
5065
5066                 info = (struct filesystem_vol_info *)(rsp->Buffer);
5067                 info->VolumeCreationTime = 0;
5068                 serial_crc = crc32_le(serial_crc, share->name,
5069                                       strlen(share->name));
5070                 serial_crc = crc32_le(serial_crc, share->path,
5071                                       strlen(share->path));
5072                 serial_crc = crc32_le(serial_crc, ksmbd_netbios_name(),
5073                                       strlen(ksmbd_netbios_name()));
5074                 /* Taking dummy value of serial number*/
5075                 info->SerialNumber = cpu_to_le32(serial_crc);
5076                 len = smbConvertToUTF16((__le16 *)info->VolumeLabel,
5077                                         share->name, PATH_MAX,
5078                                         conn->local_nls, 0);
5079                 len = len * 2;
5080                 info->VolumeLabelSize = cpu_to_le32(len);
5081                 info->Reserved = 0;
5082                 sz = sizeof(struct filesystem_vol_info) - 2 + len;
5083                 rsp->OutputBufferLength = cpu_to_le32(sz);
5084                 break;
5085         }
5086         case FS_SIZE_INFORMATION:
5087         {
5088                 struct filesystem_info *info;
5089
5090                 info = (struct filesystem_info *)(rsp->Buffer);
5091                 info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks);
5092                 info->FreeAllocationUnits = cpu_to_le64(stfs.f_bfree);
5093                 info->SectorsPerAllocationUnit = cpu_to_le32(1);
5094                 info->BytesPerSector = cpu_to_le32(stfs.f_bsize);
5095                 rsp->OutputBufferLength = cpu_to_le32(24);
5096                 break;
5097         }
5098         case FS_FULL_SIZE_INFORMATION:
5099         {
5100                 struct smb2_fs_full_size_info *info;
5101
5102                 info = (struct smb2_fs_full_size_info *)(rsp->Buffer);
5103                 info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks);
5104                 info->CallerAvailableAllocationUnits =
5105                                         cpu_to_le64(stfs.f_bavail);
5106                 info->ActualAvailableAllocationUnits =
5107                                         cpu_to_le64(stfs.f_bfree);
5108                 info->SectorsPerAllocationUnit = cpu_to_le32(1);
5109                 info->BytesPerSector = cpu_to_le32(stfs.f_bsize);
5110                 rsp->OutputBufferLength = cpu_to_le32(32);
5111                 break;
5112         }
5113         case FS_OBJECT_ID_INFORMATION:
5114         {
5115                 struct object_id_info *info;
5116
5117                 info = (struct object_id_info *)(rsp->Buffer);
5118
5119                 if (!user_guest(sess->user))
5120                         memcpy(info->objid, user_passkey(sess->user), 16);
5121                 else
5122                         memset(info->objid, 0, 16);
5123
5124                 info->extended_info.magic = cpu_to_le32(EXTENDED_INFO_MAGIC);
5125                 info->extended_info.version = cpu_to_le32(1);
5126                 info->extended_info.release = cpu_to_le32(1);
5127                 info->extended_info.rel_date = 0;
5128                 memcpy(info->extended_info.version_string, "1.1.0", strlen("1.1.0"));
5129                 rsp->OutputBufferLength = cpu_to_le32(64);
5130                 break;
5131         }
5132         case FS_SECTOR_SIZE_INFORMATION:
5133         {
5134                 struct smb3_fs_ss_info *info;
5135                 unsigned int sector_size =
5136                         min_t(unsigned int, path.mnt->mnt_sb->s_blocksize, 4096);
5137
5138                 info = (struct smb3_fs_ss_info *)(rsp->Buffer);
5139
5140                 info->LogicalBytesPerSector = cpu_to_le32(sector_size);
5141                 info->PhysicalBytesPerSectorForAtomicity =
5142                                 cpu_to_le32(sector_size);
5143                 info->PhysicalBytesPerSectorForPerf = cpu_to_le32(sector_size);
5144                 info->FSEffPhysicalBytesPerSectorForAtomicity =
5145                                 cpu_to_le32(sector_size);
5146                 info->Flags = cpu_to_le32(SSINFO_FLAGS_ALIGNED_DEVICE |
5147                                     SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE);
5148                 info->ByteOffsetForSectorAlignment = 0;
5149                 info->ByteOffsetForPartitionAlignment = 0;
5150                 rsp->OutputBufferLength = cpu_to_le32(28);
5151                 break;
5152         }
5153         case FS_CONTROL_INFORMATION:
5154         {
5155                 /*
5156                  * TODO : The current implementation is based on
5157                  * test result with win7(NTFS) server. It's need to
5158                  * modify this to get valid Quota values
5159                  * from Linux kernel
5160                  */
5161                 struct smb2_fs_control_info *info;
5162
5163                 info = (struct smb2_fs_control_info *)(rsp->Buffer);
5164                 info->FreeSpaceStartFiltering = 0;
5165                 info->FreeSpaceThreshold = 0;
5166                 info->FreeSpaceStopFiltering = 0;
5167                 info->DefaultQuotaThreshold = cpu_to_le64(SMB2_NO_FID);
5168                 info->DefaultQuotaLimit = cpu_to_le64(SMB2_NO_FID);
5169                 info->Padding = 0;
5170                 rsp->OutputBufferLength = cpu_to_le32(48);
5171                 break;
5172         }
5173         case FS_POSIX_INFORMATION:
5174         {
5175                 struct filesystem_posix_info *info;
5176
5177                 if (!work->tcon->posix_extensions) {
5178                         pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n");
5179                         rc = -EOPNOTSUPP;
5180                 } else {
5181                         info = (struct filesystem_posix_info *)(rsp->Buffer);
5182                         info->OptimalTransferSize = cpu_to_le32(stfs.f_bsize);
5183                         info->BlockSize = cpu_to_le32(stfs.f_bsize);
5184                         info->TotalBlocks = cpu_to_le64(stfs.f_blocks);
5185                         info->BlocksAvail = cpu_to_le64(stfs.f_bfree);
5186                         info->UserBlocksAvail = cpu_to_le64(stfs.f_bavail);
5187                         info->TotalFileNodes = cpu_to_le64(stfs.f_files);
5188                         info->FreeFileNodes = cpu_to_le64(stfs.f_ffree);
5189                         rsp->OutputBufferLength = cpu_to_le32(56);
5190                 }
5191                 break;
5192         }
5193         default:
5194                 path_put(&path);
5195                 return -EOPNOTSUPP;
5196         }
5197         rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
5198                               rsp, work->response_buf);
5199         path_put(&path);
5200         return rc;
5201 }
5202
5203 static int smb2_get_info_sec(struct ksmbd_work *work,
5204                              struct smb2_query_info_req *req,
5205                              struct smb2_query_info_rsp *rsp)
5206 {
5207         struct ksmbd_file *fp;
5208         struct mnt_idmap *idmap;
5209         struct smb_ntsd *pntsd = (struct smb_ntsd *)rsp->Buffer, *ppntsd = NULL;
5210         struct smb_fattr fattr = {{0}};
5211         struct inode *inode;
5212         __u32 secdesclen = 0;
5213         unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
5214         int addition_info = le32_to_cpu(req->AdditionalInformation);
5215         int rc = 0, ppntsd_size = 0;
5216
5217         if (addition_info & ~(OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO |
5218                               PROTECTED_DACL_SECINFO |
5219                               UNPROTECTED_DACL_SECINFO)) {
5220                 ksmbd_debug(SMB, "Unsupported addition info: 0x%x)\n",
5221                        addition_info);
5222
5223                 pntsd->revision = cpu_to_le16(1);
5224                 pntsd->type = cpu_to_le16(SELF_RELATIVE | DACL_PROTECTED);
5225                 pntsd->osidoffset = 0;
5226                 pntsd->gsidoffset = 0;
5227                 pntsd->sacloffset = 0;
5228                 pntsd->dacloffset = 0;
5229
5230                 secdesclen = sizeof(struct smb_ntsd);
5231                 rsp->OutputBufferLength = cpu_to_le32(secdesclen);
5232
5233                 return 0;
5234         }
5235
5236         if (work->next_smb2_rcv_hdr_off) {
5237                 if (!has_file_id(req->VolatileFileId)) {
5238                         ksmbd_debug(SMB, "Compound request set FID = %llu\n",
5239                                     work->compound_fid);
5240                         id = work->compound_fid;
5241                         pid = work->compound_pfid;
5242                 }
5243         }
5244
5245         if (!has_file_id(id)) {
5246                 id = req->VolatileFileId;
5247                 pid = req->PersistentFileId;
5248         }
5249
5250         fp = ksmbd_lookup_fd_slow(work, id, pid);
5251         if (!fp)
5252                 return -ENOENT;
5253
5254         idmap = file_mnt_idmap(fp->filp);
5255         inode = file_inode(fp->filp);
5256         ksmbd_acls_fattr(&fattr, idmap, inode);
5257
5258         if (test_share_config_flag(work->tcon->share_conf,
5259                                    KSMBD_SHARE_FLAG_ACL_XATTR))
5260                 ppntsd_size = ksmbd_vfs_get_sd_xattr(work->conn, idmap,
5261                                                      fp->filp->f_path.dentry,
5262                                                      &ppntsd);
5263
5264         /* Check if sd buffer size exceeds response buffer size */
5265         if (smb2_resp_buf_len(work, 8) > ppntsd_size)
5266                 rc = build_sec_desc(idmap, pntsd, ppntsd, ppntsd_size,
5267                                     addition_info, &secdesclen, &fattr);
5268         posix_acl_release(fattr.cf_acls);
5269         posix_acl_release(fattr.cf_dacls);
5270         kfree(ppntsd);
5271         ksmbd_fd_put(work, fp);
5272         if (rc)
5273                 return rc;
5274
5275         rsp->OutputBufferLength = cpu_to_le32(secdesclen);
5276         return 0;
5277 }
5278
5279 /**
5280  * smb2_query_info() - handler for smb2 query info command
5281  * @work:       smb work containing query info request buffer
5282  *
5283  * Return:      0 on success, otherwise error
5284  */
5285 int smb2_query_info(struct ksmbd_work *work)
5286 {
5287         struct smb2_query_info_req *req;
5288         struct smb2_query_info_rsp *rsp;
5289         int rc = 0;
5290
5291         WORK_BUFFERS(work, req, rsp);
5292
5293         ksmbd_debug(SMB, "GOT query info request\n");
5294
5295         switch (req->InfoType) {
5296         case SMB2_O_INFO_FILE:
5297                 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n");
5298                 rc = smb2_get_info_file(work, req, rsp);
5299                 break;
5300         case SMB2_O_INFO_FILESYSTEM:
5301                 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILESYSTEM\n");
5302                 rc = smb2_get_info_filesystem(work, req, rsp);
5303                 break;
5304         case SMB2_O_INFO_SECURITY:
5305                 ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n");
5306                 rc = smb2_get_info_sec(work, req, rsp);
5307                 break;
5308         default:
5309                 ksmbd_debug(SMB, "InfoType %d not supported yet\n",
5310                             req->InfoType);
5311                 rc = -EOPNOTSUPP;
5312         }
5313
5314         if (!rc) {
5315                 rsp->StructureSize = cpu_to_le16(9);
5316                 rsp->OutputBufferOffset = cpu_to_le16(72);
5317                 rc = ksmbd_iov_pin_rsp(work, (void *)rsp,
5318                                        offsetof(struct smb2_query_info_rsp, Buffer) +
5319                                         le32_to_cpu(rsp->OutputBufferLength));
5320         }
5321
5322         if (rc < 0) {
5323                 if (rc == -EACCES)
5324                         rsp->hdr.Status = STATUS_ACCESS_DENIED;
5325                 else if (rc == -ENOENT)
5326                         rsp->hdr.Status = STATUS_FILE_CLOSED;
5327                 else if (rc == -EIO)
5328                         rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
5329                 else if (rc == -ENOMEM)
5330                         rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
5331                 else if (rc == -EOPNOTSUPP || rsp->hdr.Status == 0)
5332                         rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
5333                 smb2_set_err_rsp(work);
5334
5335                 ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n",
5336                             rc);
5337                 return rc;
5338         }
5339         return 0;
5340 }
5341
5342 /**
5343  * smb2_close_pipe() - handler for closing IPC pipe
5344  * @work:       smb work containing close request buffer
5345  *
5346  * Return:      0
5347  */
5348 static noinline int smb2_close_pipe(struct ksmbd_work *work)
5349 {
5350         u64 id;
5351         struct smb2_close_req *req;
5352         struct smb2_close_rsp *rsp;
5353
5354         WORK_BUFFERS(work, req, rsp);
5355
5356         id = req->VolatileFileId;
5357         ksmbd_session_rpc_close(work->sess, id);
5358
5359         rsp->StructureSize = cpu_to_le16(60);
5360         rsp->Flags = 0;
5361         rsp->Reserved = 0;
5362         rsp->CreationTime = 0;
5363         rsp->LastAccessTime = 0;
5364         rsp->LastWriteTime = 0;
5365         rsp->ChangeTime = 0;
5366         rsp->AllocationSize = 0;
5367         rsp->EndOfFile = 0;
5368         rsp->Attributes = 0;
5369
5370         return ksmbd_iov_pin_rsp(work, (void *)rsp,
5371                                  sizeof(struct smb2_close_rsp));
5372 }
5373
5374 /**
5375  * smb2_close() - handler for smb2 close file command
5376  * @work:       smb work containing close request buffer
5377  *
5378  * Return:      0
5379  */
5380 int smb2_close(struct ksmbd_work *work)
5381 {
5382         u64 volatile_id = KSMBD_NO_FID;
5383         u64 sess_id;
5384         struct smb2_close_req *req;
5385         struct smb2_close_rsp *rsp;
5386         struct ksmbd_conn *conn = work->conn;
5387         struct ksmbd_file *fp;
5388         struct inode *inode;
5389         u64 time;
5390         int err = 0;
5391
5392         WORK_BUFFERS(work, req, rsp);
5393
5394         if (test_share_config_flag(work->tcon->share_conf,
5395                                    KSMBD_SHARE_FLAG_PIPE)) {
5396                 ksmbd_debug(SMB, "IPC pipe close request\n");
5397                 return smb2_close_pipe(work);
5398         }
5399
5400         sess_id = le64_to_cpu(req->hdr.SessionId);
5401         if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)
5402                 sess_id = work->compound_sid;
5403
5404         work->compound_sid = 0;
5405         if (check_session_id(conn, sess_id)) {
5406                 work->compound_sid = sess_id;
5407         } else {
5408                 rsp->hdr.Status = STATUS_USER_SESSION_DELETED;
5409                 if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)
5410                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
5411                 err = -EBADF;
5412                 goto out;
5413         }
5414
5415         if (work->next_smb2_rcv_hdr_off &&
5416             !has_file_id(req->VolatileFileId)) {
5417                 if (!has_file_id(work->compound_fid)) {
5418                         /* file already closed, return FILE_CLOSED */
5419                         ksmbd_debug(SMB, "file already closed\n");
5420                         rsp->hdr.Status = STATUS_FILE_CLOSED;
5421                         err = -EBADF;
5422                         goto out;
5423                 } else {
5424                         ksmbd_debug(SMB,
5425                                     "Compound request set FID = %llu:%llu\n",
5426                                     work->compound_fid,
5427                                     work->compound_pfid);
5428                         volatile_id = work->compound_fid;
5429
5430                         /* file closed, stored id is not valid anymore */
5431                         work->compound_fid = KSMBD_NO_FID;
5432                         work->compound_pfid = KSMBD_NO_FID;
5433                 }
5434         } else {
5435                 volatile_id = req->VolatileFileId;
5436         }
5437         ksmbd_debug(SMB, "volatile_id = %llu\n", volatile_id);
5438
5439         rsp->StructureSize = cpu_to_le16(60);
5440         rsp->Reserved = 0;
5441
5442         if (req->Flags == SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB) {
5443                 fp = ksmbd_lookup_fd_fast(work, volatile_id);
5444                 if (!fp) {
5445                         err = -ENOENT;
5446                         goto out;
5447                 }
5448
5449                 inode = file_inode(fp->filp);
5450                 rsp->Flags = SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB;
5451                 rsp->AllocationSize = S_ISDIR(inode->i_mode) ? 0 :
5452                         cpu_to_le64(inode->i_blocks << 9);
5453                 rsp->EndOfFile = cpu_to_le64(inode->i_size);
5454                 rsp->Attributes = fp->f_ci->m_fattr;
5455                 rsp->CreationTime = cpu_to_le64(fp->create_time);
5456                 time = ksmbd_UnixTimeToNT(inode_get_atime(inode));
5457                 rsp->LastAccessTime = cpu_to_le64(time);
5458                 time = ksmbd_UnixTimeToNT(inode_get_mtime(inode));
5459                 rsp->LastWriteTime = cpu_to_le64(time);
5460                 time = ksmbd_UnixTimeToNT(inode_get_ctime(inode));
5461                 rsp->ChangeTime = cpu_to_le64(time);
5462                 ksmbd_fd_put(work, fp);
5463         } else {
5464                 rsp->Flags = 0;
5465                 rsp->AllocationSize = 0;
5466                 rsp->EndOfFile = 0;
5467                 rsp->Attributes = 0;
5468                 rsp->CreationTime = 0;
5469                 rsp->LastAccessTime = 0;
5470                 rsp->LastWriteTime = 0;
5471                 rsp->ChangeTime = 0;
5472         }
5473
5474         err = ksmbd_close_fd(work, volatile_id);
5475 out:
5476         if (!err)
5477                 err = ksmbd_iov_pin_rsp(work, (void *)rsp,
5478                                         sizeof(struct smb2_close_rsp));
5479
5480         if (err) {
5481                 if (rsp->hdr.Status == 0)
5482                         rsp->hdr.Status = STATUS_FILE_CLOSED;
5483                 smb2_set_err_rsp(work);
5484         }
5485
5486         return err;
5487 }
5488
5489 /**
5490  * smb2_echo() - handler for smb2 echo(ping) command
5491  * @work:       smb work containing echo request buffer
5492  *
5493  * Return:      0
5494  */
5495 int smb2_echo(struct ksmbd_work *work)
5496 {
5497         struct smb2_echo_rsp *rsp = smb2_get_msg(work->response_buf);
5498
5499         if (work->next_smb2_rcv_hdr_off)
5500                 rsp = ksmbd_resp_buf_next(work);
5501
5502         rsp->StructureSize = cpu_to_le16(4);
5503         rsp->Reserved = 0;
5504         return ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_echo_rsp));
5505 }
5506
5507 static int smb2_rename(struct ksmbd_work *work,
5508                        struct ksmbd_file *fp,
5509                        struct smb2_file_rename_info *file_info,
5510                        struct nls_table *local_nls)
5511 {
5512         struct ksmbd_share_config *share = fp->tcon->share_conf;
5513         char *new_name = NULL;
5514         int rc, flags = 0;
5515
5516         ksmbd_debug(SMB, "setting FILE_RENAME_INFO\n");
5517         new_name = smb2_get_name(file_info->FileName,
5518                                  le32_to_cpu(file_info->FileNameLength),
5519                                  local_nls);
5520         if (IS_ERR(new_name))
5521                 return PTR_ERR(new_name);
5522
5523         if (strchr(new_name, ':')) {
5524                 int s_type;
5525                 char *xattr_stream_name, *stream_name = NULL;
5526                 size_t xattr_stream_size;
5527                 int len;
5528
5529                 rc = parse_stream_name(new_name, &stream_name, &s_type);
5530                 if (rc < 0)
5531                         goto out;
5532
5533                 len = strlen(new_name);
5534                 if (len > 0 && new_name[len - 1] != '/') {
5535                         pr_err("not allow base filename in rename\n");
5536                         rc = -ESHARE;
5537                         goto out;
5538                 }
5539
5540                 rc = ksmbd_vfs_xattr_stream_name(stream_name,
5541                                                  &xattr_stream_name,
5542                                                  &xattr_stream_size,
5543                                                  s_type);
5544                 if (rc)
5545                         goto out;
5546
5547                 rc = ksmbd_vfs_setxattr(file_mnt_idmap(fp->filp),
5548                                         &fp->filp->f_path,
5549                                         xattr_stream_name,
5550                                         NULL, 0, 0, true);
5551                 if (rc < 0) {
5552                         pr_err("failed to store stream name in xattr: %d\n",
5553                                rc);
5554                         rc = -EINVAL;
5555                         goto out;
5556                 }
5557
5558                 goto out;
5559         }
5560
5561         ksmbd_debug(SMB, "new name %s\n", new_name);
5562         if (ksmbd_share_veto_filename(share, new_name)) {
5563                 rc = -ENOENT;
5564                 ksmbd_debug(SMB, "Can't rename vetoed file: %s\n", new_name);
5565                 goto out;
5566         }
5567
5568         if (!file_info->ReplaceIfExists)
5569                 flags = RENAME_NOREPLACE;
5570
5571         rc = ksmbd_vfs_rename(work, &fp->filp->f_path, new_name, flags);
5572 out:
5573         kfree(new_name);
5574         return rc;
5575 }
5576
5577 static int smb2_create_link(struct ksmbd_work *work,
5578                             struct ksmbd_share_config *share,
5579                             struct smb2_file_link_info *file_info,
5580                             unsigned int buf_len, struct file *filp,
5581                             struct nls_table *local_nls)
5582 {
5583         char *link_name = NULL, *target_name = NULL, *pathname = NULL;
5584         struct path path, parent_path;
5585         bool file_present = false;
5586         int rc;
5587
5588         if (buf_len < (u64)sizeof(struct smb2_file_link_info) +
5589                         le32_to_cpu(file_info->FileNameLength))
5590                 return -EINVAL;
5591
5592         ksmbd_debug(SMB, "setting FILE_LINK_INFORMATION\n");
5593         pathname = kmalloc(PATH_MAX, GFP_KERNEL);
5594         if (!pathname)
5595                 return -ENOMEM;
5596
5597         link_name = smb2_get_name(file_info->FileName,
5598                                   le32_to_cpu(file_info->FileNameLength),
5599                                   local_nls);
5600         if (IS_ERR(link_name) || S_ISDIR(file_inode(filp)->i_mode)) {
5601                 rc = -EINVAL;
5602                 goto out;
5603         }
5604
5605         ksmbd_debug(SMB, "link name is %s\n", link_name);
5606         target_name = file_path(filp, pathname, PATH_MAX);
5607         if (IS_ERR(target_name)) {
5608                 rc = -EINVAL;
5609                 goto out;
5610         }
5611
5612         ksmbd_debug(SMB, "target name is %s\n", target_name);
5613         rc = ksmbd_vfs_kern_path_locked(work, link_name, LOOKUP_NO_SYMLINKS,
5614                                         &parent_path, &path, 0);
5615         if (rc) {
5616                 if (rc != -ENOENT)
5617                         goto out;
5618         } else
5619                 file_present = true;
5620
5621         if (file_info->ReplaceIfExists) {
5622                 if (file_present) {
5623                         rc = ksmbd_vfs_remove_file(work, &path);
5624                         if (rc) {
5625                                 rc = -EINVAL;
5626                                 ksmbd_debug(SMB, "cannot delete %s\n",
5627                                             link_name);
5628                                 goto out;
5629                         }
5630                 }
5631         } else {
5632                 if (file_present) {
5633                         rc = -EEXIST;
5634                         ksmbd_debug(SMB, "link already exists\n");
5635                         goto out;
5636                 }
5637         }
5638
5639         rc = ksmbd_vfs_link(work, target_name, link_name);
5640         if (rc)
5641                 rc = -EINVAL;
5642 out:
5643         if (file_present)
5644                 ksmbd_vfs_kern_path_unlock(&parent_path, &path);
5645
5646         if (!IS_ERR(link_name))
5647                 kfree(link_name);
5648         kfree(pathname);
5649         return rc;
5650 }
5651
5652 static int set_file_basic_info(struct ksmbd_file *fp,
5653                                struct smb2_file_basic_info *file_info,
5654                                struct ksmbd_share_config *share)
5655 {
5656         struct iattr attrs;
5657         struct file *filp;
5658         struct inode *inode;
5659         struct mnt_idmap *idmap;
5660         int rc = 0;
5661
5662         if (!(fp->daccess & FILE_WRITE_ATTRIBUTES_LE))
5663                 return -EACCES;
5664
5665         attrs.ia_valid = 0;
5666         filp = fp->filp;
5667         inode = file_inode(filp);
5668         idmap = file_mnt_idmap(filp);
5669
5670         if (file_info->CreationTime)
5671                 fp->create_time = le64_to_cpu(file_info->CreationTime);
5672
5673         if (file_info->LastAccessTime) {
5674                 attrs.ia_atime = ksmbd_NTtimeToUnix(file_info->LastAccessTime);
5675                 attrs.ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
5676         }
5677
5678         attrs.ia_valid |= ATTR_CTIME;
5679         if (file_info->ChangeTime)
5680                 attrs.ia_ctime = ksmbd_NTtimeToUnix(file_info->ChangeTime);
5681         else
5682                 attrs.ia_ctime = inode_get_ctime(inode);
5683
5684         if (file_info->LastWriteTime) {
5685                 attrs.ia_mtime = ksmbd_NTtimeToUnix(file_info->LastWriteTime);
5686                 attrs.ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
5687         }
5688
5689         if (file_info->Attributes) {
5690                 if (!S_ISDIR(inode->i_mode) &&
5691                     file_info->Attributes & FILE_ATTRIBUTE_DIRECTORY_LE) {
5692                         pr_err("can't change a file to a directory\n");
5693                         return -EINVAL;
5694                 }
5695
5696                 if (!(S_ISDIR(inode->i_mode) && file_info->Attributes == FILE_ATTRIBUTE_NORMAL_LE))
5697                         fp->f_ci->m_fattr = file_info->Attributes |
5698                                 (fp->f_ci->m_fattr & FILE_ATTRIBUTE_DIRECTORY_LE);
5699         }
5700
5701         if (test_share_config_flag(share, KSMBD_SHARE_FLAG_STORE_DOS_ATTRS) &&
5702             (file_info->CreationTime || file_info->Attributes)) {
5703                 struct xattr_dos_attrib da = {0};
5704
5705                 da.version = 4;
5706                 da.itime = fp->itime;
5707                 da.create_time = fp->create_time;
5708                 da.attr = le32_to_cpu(fp->f_ci->m_fattr);
5709                 da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME |
5710                         XATTR_DOSINFO_ITIME;
5711
5712                 rc = ksmbd_vfs_set_dos_attrib_xattr(idmap, &filp->f_path, &da,
5713                                 true);
5714                 if (rc)
5715                         ksmbd_debug(SMB,
5716                                     "failed to restore file attribute in EA\n");
5717                 rc = 0;
5718         }
5719
5720         if (attrs.ia_valid) {
5721                 struct dentry *dentry = filp->f_path.dentry;
5722                 struct inode *inode = d_inode(dentry);
5723
5724                 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
5725                         return -EACCES;
5726
5727                 inode_lock(inode);
5728                 inode_set_ctime_to_ts(inode, attrs.ia_ctime);
5729                 attrs.ia_valid &= ~ATTR_CTIME;
5730                 rc = notify_change(idmap, dentry, &attrs, NULL);
5731                 inode_unlock(inode);
5732         }
5733         return rc;
5734 }
5735
5736 static int set_file_allocation_info(struct ksmbd_work *work,
5737                                     struct ksmbd_file *fp,
5738                                     struct smb2_file_alloc_info *file_alloc_info)
5739 {
5740         /*
5741          * TODO : It's working fine only when store dos attributes
5742          * is not yes. need to implement a logic which works
5743          * properly with any smb.conf option
5744          */
5745
5746         loff_t alloc_blks;
5747         struct inode *inode;
5748         int rc;
5749
5750         if (!(fp->daccess & FILE_WRITE_DATA_LE))
5751                 return -EACCES;
5752
5753         alloc_blks = (le64_to_cpu(file_alloc_info->AllocationSize) + 511) >> 9;
5754         inode = file_inode(fp->filp);
5755
5756         if (alloc_blks > inode->i_blocks) {
5757                 smb_break_all_levII_oplock(work, fp, 1);
5758                 rc = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0,
5759                                    alloc_blks * 512);
5760                 if (rc && rc != -EOPNOTSUPP) {
5761                         pr_err("vfs_fallocate is failed : %d\n", rc);
5762                         return rc;
5763                 }
5764         } else if (alloc_blks < inode->i_blocks) {
5765                 loff_t size;
5766
5767                 /*
5768                  * Allocation size could be smaller than original one
5769                  * which means allocated blocks in file should be
5770                  * deallocated. use truncate to cut out it, but inode
5771                  * size is also updated with truncate offset.
5772                  * inode size is retained by backup inode size.
5773                  */
5774                 size = i_size_read(inode);
5775                 rc = ksmbd_vfs_truncate(work, fp, alloc_blks * 512);
5776                 if (rc) {
5777                         pr_err("truncate failed!, err %d\n", rc);
5778                         return rc;
5779                 }
5780                 if (size < alloc_blks * 512)
5781                         i_size_write(inode, size);
5782         }
5783         return 0;
5784 }
5785
5786 static int set_end_of_file_info(struct ksmbd_work *work, struct ksmbd_file *fp,
5787                                 struct smb2_file_eof_info *file_eof_info)
5788 {
5789         loff_t newsize;
5790         struct inode *inode;
5791         int rc;
5792
5793         if (!(fp->daccess & FILE_WRITE_DATA_LE))
5794                 return -EACCES;
5795
5796         newsize = le64_to_cpu(file_eof_info->EndOfFile);
5797         inode = file_inode(fp->filp);
5798
5799         /*
5800          * If FILE_END_OF_FILE_INFORMATION of set_info_file is called
5801          * on FAT32 shared device, truncate execution time is too long
5802          * and network error could cause from windows client. because
5803          * truncate of some filesystem like FAT32 fill zero data in
5804          * truncated range.
5805          */
5806         if (inode->i_sb->s_magic != MSDOS_SUPER_MAGIC) {
5807                 ksmbd_debug(SMB, "truncated to newsize %lld\n", newsize);
5808                 rc = ksmbd_vfs_truncate(work, fp, newsize);
5809                 if (rc) {
5810                         ksmbd_debug(SMB, "truncate failed!, err %d\n", rc);
5811                         if (rc != -EAGAIN)
5812                                 rc = -EBADF;
5813                         return rc;
5814                 }
5815         }
5816         return 0;
5817 }
5818
5819 static int set_rename_info(struct ksmbd_work *work, struct ksmbd_file *fp,
5820                            struct smb2_file_rename_info *rename_info,
5821                            unsigned int buf_len)
5822 {
5823         if (!(fp->daccess & FILE_DELETE_LE)) {
5824                 pr_err("no right to delete : 0x%x\n", fp->daccess);
5825                 return -EACCES;
5826         }
5827
5828         if (buf_len < (u64)sizeof(struct smb2_file_rename_info) +
5829                         le32_to_cpu(rename_info->FileNameLength))
5830                 return -EINVAL;
5831
5832         if (!le32_to_cpu(rename_info->FileNameLength))
5833                 return -EINVAL;
5834
5835         return smb2_rename(work, fp, rename_info, work->conn->local_nls);
5836 }
5837
5838 static int set_file_disposition_info(struct ksmbd_file *fp,
5839                                      struct smb2_file_disposition_info *file_info)
5840 {
5841         struct inode *inode;
5842
5843         if (!(fp->daccess & FILE_DELETE_LE)) {
5844                 pr_err("no right to delete : 0x%x\n", fp->daccess);
5845                 return -EACCES;
5846         }
5847
5848         inode = file_inode(fp->filp);
5849         if (file_info->DeletePending) {
5850                 if (S_ISDIR(inode->i_mode) &&
5851                     ksmbd_vfs_empty_dir(fp) == -ENOTEMPTY)
5852                         return -EBUSY;
5853                 ksmbd_set_inode_pending_delete(fp);
5854         } else {
5855                 ksmbd_clear_inode_pending_delete(fp);
5856         }
5857         return 0;
5858 }
5859
5860 static int set_file_position_info(struct ksmbd_file *fp,
5861                                   struct smb2_file_pos_info *file_info)
5862 {
5863         loff_t current_byte_offset;
5864         unsigned long sector_size;
5865         struct inode *inode;
5866
5867         inode = file_inode(fp->filp);
5868         current_byte_offset = le64_to_cpu(file_info->CurrentByteOffset);
5869         sector_size = inode->i_sb->s_blocksize;
5870
5871         if (current_byte_offset < 0 ||
5872             (fp->coption == FILE_NO_INTERMEDIATE_BUFFERING_LE &&
5873              current_byte_offset & (sector_size - 1))) {
5874                 pr_err("CurrentByteOffset is not valid : %llu\n",
5875                        current_byte_offset);
5876                 return -EINVAL;
5877         }
5878
5879         fp->filp->f_pos = current_byte_offset;
5880         return 0;
5881 }
5882
5883 static int set_file_mode_info(struct ksmbd_file *fp,
5884                               struct smb2_file_mode_info *file_info)
5885 {
5886         __le32 mode;
5887
5888         mode = file_info->Mode;
5889
5890         if ((mode & ~FILE_MODE_INFO_MASK)) {
5891                 pr_err("Mode is not valid : 0x%x\n", le32_to_cpu(mode));
5892                 return -EINVAL;
5893         }
5894
5895         /*
5896          * TODO : need to implement consideration for
5897          * FILE_SYNCHRONOUS_IO_ALERT and FILE_SYNCHRONOUS_IO_NONALERT
5898          */
5899         ksmbd_vfs_set_fadvise(fp->filp, mode);
5900         fp->coption = mode;
5901         return 0;
5902 }
5903
5904 /**
5905  * smb2_set_info_file() - handler for smb2 set info command
5906  * @work:       smb work containing set info command buffer
5907  * @fp:         ksmbd_file pointer
5908  * @req:        request buffer pointer
5909  * @share:      ksmbd_share_config pointer
5910  *
5911  * Return:      0 on success, otherwise error
5912  * TODO: need to implement an error handling for STATUS_INFO_LENGTH_MISMATCH
5913  */
5914 static int smb2_set_info_file(struct ksmbd_work *work, struct ksmbd_file *fp,
5915                               struct smb2_set_info_req *req,
5916                               struct ksmbd_share_config *share)
5917 {
5918         unsigned int buf_len = le32_to_cpu(req->BufferLength);
5919
5920         switch (req->FileInfoClass) {
5921         case FILE_BASIC_INFORMATION:
5922         {
5923                 if (buf_len < sizeof(struct smb2_file_basic_info))
5924                         return -EINVAL;
5925
5926                 return set_file_basic_info(fp, (struct smb2_file_basic_info *)req->Buffer, share);
5927         }
5928         case FILE_ALLOCATION_INFORMATION:
5929         {
5930                 if (buf_len < sizeof(struct smb2_file_alloc_info))
5931                         return -EINVAL;
5932
5933                 return set_file_allocation_info(work, fp,
5934                                                 (struct smb2_file_alloc_info *)req->Buffer);
5935         }
5936         case FILE_END_OF_FILE_INFORMATION:
5937         {
5938                 if (buf_len < sizeof(struct smb2_file_eof_info))
5939                         return -EINVAL;
5940
5941                 return set_end_of_file_info(work, fp,
5942                                             (struct smb2_file_eof_info *)req->Buffer);
5943         }
5944         case FILE_RENAME_INFORMATION:
5945         {
5946                 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
5947                         ksmbd_debug(SMB,
5948                                     "User does not have write permission\n");
5949                         return -EACCES;
5950                 }
5951
5952                 if (buf_len < sizeof(struct smb2_file_rename_info))
5953                         return -EINVAL;
5954
5955                 return set_rename_info(work, fp,
5956                                        (struct smb2_file_rename_info *)req->Buffer,
5957                                        buf_len);
5958         }
5959         case FILE_LINK_INFORMATION:
5960         {
5961                 if (buf_len < sizeof(struct smb2_file_link_info))
5962                         return -EINVAL;
5963
5964                 return smb2_create_link(work, work->tcon->share_conf,
5965                                         (struct smb2_file_link_info *)req->Buffer,
5966                                         buf_len, fp->filp,
5967                                         work->conn->local_nls);
5968         }
5969         case FILE_DISPOSITION_INFORMATION:
5970         {
5971                 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
5972                         ksmbd_debug(SMB,
5973                                     "User does not have write permission\n");
5974                         return -EACCES;
5975                 }
5976
5977                 if (buf_len < sizeof(struct smb2_file_disposition_info))
5978                         return -EINVAL;
5979
5980                 return set_file_disposition_info(fp,
5981                                                  (struct smb2_file_disposition_info *)req->Buffer);
5982         }
5983         case FILE_FULL_EA_INFORMATION:
5984         {
5985                 if (!(fp->daccess & FILE_WRITE_EA_LE)) {
5986                         pr_err("Not permitted to write ext  attr: 0x%x\n",
5987                                fp->daccess);
5988                         return -EACCES;
5989                 }
5990
5991                 if (buf_len < sizeof(struct smb2_ea_info))
5992                         return -EINVAL;
5993
5994                 return smb2_set_ea((struct smb2_ea_info *)req->Buffer,
5995                                    buf_len, &fp->filp->f_path);
5996         }
5997         case FILE_POSITION_INFORMATION:
5998         {
5999                 if (buf_len < sizeof(struct smb2_file_pos_info))
6000                         return -EINVAL;
6001
6002                 return set_file_position_info(fp, (struct smb2_file_pos_info *)req->Buffer);
6003         }
6004         case FILE_MODE_INFORMATION:
6005         {
6006                 if (buf_len < sizeof(struct smb2_file_mode_info))
6007                         return -EINVAL;
6008
6009                 return set_file_mode_info(fp, (struct smb2_file_mode_info *)req->Buffer);
6010         }
6011         }
6012
6013         pr_err("Unimplemented Fileinfoclass :%d\n", req->FileInfoClass);
6014         return -EOPNOTSUPP;
6015 }
6016
6017 static int smb2_set_info_sec(struct ksmbd_file *fp, int addition_info,
6018                              char *buffer, int buf_len)
6019 {
6020         struct smb_ntsd *pntsd = (struct smb_ntsd *)buffer;
6021
6022         fp->saccess |= FILE_SHARE_DELETE_LE;
6023
6024         return set_info_sec(fp->conn, fp->tcon, &fp->filp->f_path, pntsd,
6025                         buf_len, false, true);
6026 }
6027
6028 /**
6029  * smb2_set_info() - handler for smb2 set info command handler
6030  * @work:       smb work containing set info request buffer
6031  *
6032  * Return:      0 on success, otherwise error
6033  */
6034 int smb2_set_info(struct ksmbd_work *work)
6035 {
6036         struct smb2_set_info_req *req;
6037         struct smb2_set_info_rsp *rsp;
6038         struct ksmbd_file *fp;
6039         int rc = 0;
6040         unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
6041
6042         ksmbd_debug(SMB, "Received set info request\n");
6043
6044         if (work->next_smb2_rcv_hdr_off) {
6045                 req = ksmbd_req_buf_next(work);
6046                 rsp = ksmbd_resp_buf_next(work);
6047                 if (!has_file_id(req->VolatileFileId)) {
6048                         ksmbd_debug(SMB, "Compound request set FID = %llu\n",
6049                                     work->compound_fid);
6050                         id = work->compound_fid;
6051                         pid = work->compound_pfid;
6052                 }
6053         } else {
6054                 req = smb2_get_msg(work->request_buf);
6055                 rsp = smb2_get_msg(work->response_buf);
6056         }
6057
6058         if (!has_file_id(id)) {
6059                 id = req->VolatileFileId;
6060                 pid = req->PersistentFileId;
6061         }
6062
6063         fp = ksmbd_lookup_fd_slow(work, id, pid);
6064         if (!fp) {
6065                 ksmbd_debug(SMB, "Invalid id for close: %u\n", id);
6066                 rc = -ENOENT;
6067                 goto err_out;
6068         }
6069
6070         switch (req->InfoType) {
6071         case SMB2_O_INFO_FILE:
6072                 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n");
6073                 rc = smb2_set_info_file(work, fp, req, work->tcon->share_conf);
6074                 break;
6075         case SMB2_O_INFO_SECURITY:
6076                 ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n");
6077                 if (ksmbd_override_fsids(work)) {
6078                         rc = -ENOMEM;
6079                         goto err_out;
6080                 }
6081                 rc = smb2_set_info_sec(fp,
6082                                        le32_to_cpu(req->AdditionalInformation),
6083                                        req->Buffer,
6084                                        le32_to_cpu(req->BufferLength));
6085                 ksmbd_revert_fsids(work);
6086                 break;
6087         default:
6088                 rc = -EOPNOTSUPP;
6089         }
6090
6091         if (rc < 0)
6092                 goto err_out;
6093
6094         rsp->StructureSize = cpu_to_le16(2);
6095         rc = ksmbd_iov_pin_rsp(work, (void *)rsp,
6096                                sizeof(struct smb2_set_info_rsp));
6097         if (rc)
6098                 goto err_out;
6099         ksmbd_fd_put(work, fp);
6100         return 0;
6101
6102 err_out:
6103         if (rc == -EACCES || rc == -EPERM || rc == -EXDEV)
6104                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
6105         else if (rc == -EINVAL)
6106                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
6107         else if (rc == -ESHARE)
6108                 rsp->hdr.Status = STATUS_SHARING_VIOLATION;
6109         else if (rc == -ENOENT)
6110                 rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID;
6111         else if (rc == -EBUSY || rc == -ENOTEMPTY)
6112                 rsp->hdr.Status = STATUS_DIRECTORY_NOT_EMPTY;
6113         else if (rc == -EAGAIN)
6114                 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
6115         else if (rc == -EBADF || rc == -ESTALE)
6116                 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6117         else if (rc == -EEXIST)
6118                 rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION;
6119         else if (rsp->hdr.Status == 0 || rc == -EOPNOTSUPP)
6120                 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
6121         smb2_set_err_rsp(work);
6122         ksmbd_fd_put(work, fp);
6123         ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n", rc);
6124         return rc;
6125 }
6126
6127 /**
6128  * smb2_read_pipe() - handler for smb2 read from IPC pipe
6129  * @work:       smb work containing read IPC pipe command buffer
6130  *
6131  * Return:      0 on success, otherwise error
6132  */
6133 static noinline int smb2_read_pipe(struct ksmbd_work *work)
6134 {
6135         int nbytes = 0, err;
6136         u64 id;
6137         struct ksmbd_rpc_command *rpc_resp;
6138         struct smb2_read_req *req;
6139         struct smb2_read_rsp *rsp;
6140
6141         WORK_BUFFERS(work, req, rsp);
6142
6143         id = req->VolatileFileId;
6144
6145         rpc_resp = ksmbd_rpc_read(work->sess, id);
6146         if (rpc_resp) {
6147                 void *aux_payload_buf;
6148
6149                 if (rpc_resp->flags != KSMBD_RPC_OK) {
6150                         err = -EINVAL;
6151                         goto out;
6152                 }
6153
6154                 aux_payload_buf =
6155                         kvmalloc(rpc_resp->payload_sz, GFP_KERNEL);
6156                 if (!aux_payload_buf) {
6157                         err = -ENOMEM;
6158                         goto out;
6159                 }
6160
6161                 memcpy(aux_payload_buf, rpc_resp->payload, rpc_resp->payload_sz);
6162
6163                 nbytes = rpc_resp->payload_sz;
6164                 err = ksmbd_iov_pin_rsp_read(work, (void *)rsp,
6165                                              offsetof(struct smb2_read_rsp, Buffer),
6166                                              aux_payload_buf, nbytes);
6167                 if (err)
6168                         goto out;
6169                 kvfree(rpc_resp);
6170         } else {
6171                 err = ksmbd_iov_pin_rsp(work, (void *)rsp,
6172                                         offsetof(struct smb2_read_rsp, Buffer));
6173                 if (err)
6174                         goto out;
6175         }
6176
6177         rsp->StructureSize = cpu_to_le16(17);
6178         rsp->DataOffset = 80;
6179         rsp->Reserved = 0;
6180         rsp->DataLength = cpu_to_le32(nbytes);
6181         rsp->DataRemaining = 0;
6182         rsp->Flags = 0;
6183         return 0;
6184
6185 out:
6186         rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
6187         smb2_set_err_rsp(work);
6188         kvfree(rpc_resp);
6189         return err;
6190 }
6191
6192 static int smb2_set_remote_key_for_rdma(struct ksmbd_work *work,
6193                                         struct smb2_buffer_desc_v1 *desc,
6194                                         __le32 Channel,
6195                                         __le16 ChannelInfoLength)
6196 {
6197         unsigned int i, ch_count;
6198
6199         if (work->conn->dialect == SMB30_PROT_ID &&
6200             Channel != SMB2_CHANNEL_RDMA_V1)
6201                 return -EINVAL;
6202
6203         ch_count = le16_to_cpu(ChannelInfoLength) / sizeof(*desc);
6204         if (ksmbd_debug_types & KSMBD_DEBUG_RDMA) {
6205                 for (i = 0; i < ch_count; i++) {
6206                         pr_info("RDMA r/w request %#x: token %#x, length %#x\n",
6207                                 i,
6208                                 le32_to_cpu(desc[i].token),
6209                                 le32_to_cpu(desc[i].length));
6210                 }
6211         }
6212         if (!ch_count)
6213                 return -EINVAL;
6214
6215         work->need_invalidate_rkey =
6216                 (Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE);
6217         if (Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE)
6218                 work->remote_key = le32_to_cpu(desc->token);
6219         return 0;
6220 }
6221
6222 static ssize_t smb2_read_rdma_channel(struct ksmbd_work *work,
6223                                       struct smb2_read_req *req, void *data_buf,
6224                                       size_t length)
6225 {
6226         int err;
6227
6228         err = ksmbd_conn_rdma_write(work->conn, data_buf, length,
6229                                     (struct smb2_buffer_desc_v1 *)
6230                                     ((char *)req + le16_to_cpu(req->ReadChannelInfoOffset)),
6231                                     le16_to_cpu(req->ReadChannelInfoLength));
6232         if (err)
6233                 return err;
6234
6235         return length;
6236 }
6237
6238 /**
6239  * smb2_read() - handler for smb2 read from file
6240  * @work:       smb work containing read command buffer
6241  *
6242  * Return:      0 on success, otherwise error
6243  */
6244 int smb2_read(struct ksmbd_work *work)
6245 {
6246         struct ksmbd_conn *conn = work->conn;
6247         struct smb2_read_req *req;
6248         struct smb2_read_rsp *rsp;
6249         struct ksmbd_file *fp = NULL;
6250         loff_t offset;
6251         size_t length, mincount;
6252         ssize_t nbytes = 0, remain_bytes = 0;
6253         int err = 0;
6254         bool is_rdma_channel = false;
6255         unsigned int max_read_size = conn->vals->max_read_size;
6256         unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
6257         void *aux_payload_buf;
6258
6259         if (test_share_config_flag(work->tcon->share_conf,
6260                                    KSMBD_SHARE_FLAG_PIPE)) {
6261                 ksmbd_debug(SMB, "IPC pipe read request\n");
6262                 return smb2_read_pipe(work);
6263         }
6264
6265         if (work->next_smb2_rcv_hdr_off) {
6266                 req = ksmbd_req_buf_next(work);
6267                 rsp = ksmbd_resp_buf_next(work);
6268                 if (!has_file_id(req->VolatileFileId)) {
6269                         ksmbd_debug(SMB, "Compound request set FID = %llu\n",
6270                                         work->compound_fid);
6271                         id = work->compound_fid;
6272                         pid = work->compound_pfid;
6273                 }
6274         } else {
6275                 req = smb2_get_msg(work->request_buf);
6276                 rsp = smb2_get_msg(work->response_buf);
6277         }
6278
6279         if (!has_file_id(id)) {
6280                 id = req->VolatileFileId;
6281                 pid = req->PersistentFileId;
6282         }
6283
6284         if (req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE ||
6285             req->Channel == SMB2_CHANNEL_RDMA_V1) {
6286                 is_rdma_channel = true;
6287                 max_read_size = get_smbd_max_read_write_size();
6288         }
6289
6290         if (is_rdma_channel == true) {
6291                 unsigned int ch_offset = le16_to_cpu(req->ReadChannelInfoOffset);
6292
6293                 if (ch_offset < offsetof(struct smb2_read_req, Buffer)) {
6294                         err = -EINVAL;
6295                         goto out;
6296                 }
6297                 err = smb2_set_remote_key_for_rdma(work,
6298                                                    (struct smb2_buffer_desc_v1 *)
6299                                                    ((char *)req + ch_offset),
6300                                                    req->Channel,
6301                                                    req->ReadChannelInfoLength);
6302                 if (err)
6303                         goto out;
6304         }
6305
6306         fp = ksmbd_lookup_fd_slow(work, id, pid);
6307         if (!fp) {
6308                 err = -ENOENT;
6309                 goto out;
6310         }
6311
6312         if (!(fp->daccess & (FILE_READ_DATA_LE | FILE_READ_ATTRIBUTES_LE))) {
6313                 pr_err("Not permitted to read : 0x%x\n", fp->daccess);
6314                 err = -EACCES;
6315                 goto out;
6316         }
6317
6318         offset = le64_to_cpu(req->Offset);
6319         length = le32_to_cpu(req->Length);
6320         mincount = le32_to_cpu(req->MinimumCount);
6321
6322         if (length > max_read_size) {
6323                 ksmbd_debug(SMB, "limiting read size to max size(%u)\n",
6324                             max_read_size);
6325                 err = -EINVAL;
6326                 goto out;
6327         }
6328
6329         ksmbd_debug(SMB, "filename %pD, offset %lld, len %zu\n",
6330                     fp->filp, offset, length);
6331
6332         aux_payload_buf = kvzalloc(length, GFP_KERNEL);
6333         if (!aux_payload_buf) {
6334                 err = -ENOMEM;
6335                 goto out;
6336         }
6337
6338         nbytes = ksmbd_vfs_read(work, fp, length, &offset, aux_payload_buf);
6339         if (nbytes < 0) {
6340                 err = nbytes;
6341                 goto out;
6342         }
6343
6344         if ((nbytes == 0 && length != 0) || nbytes < mincount) {
6345                 kvfree(aux_payload_buf);
6346                 rsp->hdr.Status = STATUS_END_OF_FILE;
6347                 smb2_set_err_rsp(work);
6348                 ksmbd_fd_put(work, fp);
6349                 return 0;
6350         }
6351
6352         ksmbd_debug(SMB, "nbytes %zu, offset %lld mincount %zu\n",
6353                     nbytes, offset, mincount);
6354
6355         if (is_rdma_channel == true) {
6356                 /* write data to the client using rdma channel */
6357                 remain_bytes = smb2_read_rdma_channel(work, req,
6358                                                       aux_payload_buf,
6359                                                       nbytes);
6360                 kvfree(aux_payload_buf);
6361                 aux_payload_buf = NULL;
6362                 nbytes = 0;
6363                 if (remain_bytes < 0) {
6364                         err = (int)remain_bytes;
6365                         goto out;
6366                 }
6367         }
6368
6369         rsp->StructureSize = cpu_to_le16(17);
6370         rsp->DataOffset = 80;
6371         rsp->Reserved = 0;
6372         rsp->DataLength = cpu_to_le32(nbytes);
6373         rsp->DataRemaining = cpu_to_le32(remain_bytes);
6374         rsp->Flags = 0;
6375         err = ksmbd_iov_pin_rsp_read(work, (void *)rsp,
6376                                      offsetof(struct smb2_read_rsp, Buffer),
6377                                      aux_payload_buf, nbytes);
6378         if (err)
6379                 goto out;
6380         ksmbd_fd_put(work, fp);
6381         return 0;
6382
6383 out:
6384         if (err) {
6385                 if (err == -EISDIR)
6386                         rsp->hdr.Status = STATUS_INVALID_DEVICE_REQUEST;
6387                 else if (err == -EAGAIN)
6388                         rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
6389                 else if (err == -ENOENT)
6390                         rsp->hdr.Status = STATUS_FILE_CLOSED;
6391                 else if (err == -EACCES)
6392                         rsp->hdr.Status = STATUS_ACCESS_DENIED;
6393                 else if (err == -ESHARE)
6394                         rsp->hdr.Status = STATUS_SHARING_VIOLATION;
6395                 else if (err == -EINVAL)
6396                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
6397                 else
6398                         rsp->hdr.Status = STATUS_INVALID_HANDLE;
6399
6400                 smb2_set_err_rsp(work);
6401         }
6402         ksmbd_fd_put(work, fp);
6403         return err;
6404 }
6405
6406 /**
6407  * smb2_write_pipe() - handler for smb2 write on IPC pipe
6408  * @work:       smb work containing write IPC pipe command buffer
6409  *
6410  * Return:      0 on success, otherwise error
6411  */
6412 static noinline int smb2_write_pipe(struct ksmbd_work *work)
6413 {
6414         struct smb2_write_req *req;
6415         struct smb2_write_rsp *rsp;
6416         struct ksmbd_rpc_command *rpc_resp;
6417         u64 id = 0;
6418         int err = 0, ret = 0;
6419         char *data_buf;
6420         size_t length;
6421
6422         WORK_BUFFERS(work, req, rsp);
6423
6424         length = le32_to_cpu(req->Length);
6425         id = req->VolatileFileId;
6426
6427         if ((u64)le16_to_cpu(req->DataOffset) + length >
6428             get_rfc1002_len(work->request_buf)) {
6429                 pr_err("invalid write data offset %u, smb_len %u\n",
6430                        le16_to_cpu(req->DataOffset),
6431                        get_rfc1002_len(work->request_buf));
6432                 err = -EINVAL;
6433                 goto out;
6434         }
6435
6436         data_buf = (char *)(((char *)&req->hdr.ProtocolId) +
6437                            le16_to_cpu(req->DataOffset));
6438
6439         rpc_resp = ksmbd_rpc_write(work->sess, id, data_buf, length);
6440         if (rpc_resp) {
6441                 if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) {
6442                         rsp->hdr.Status = STATUS_NOT_SUPPORTED;
6443                         kvfree(rpc_resp);
6444                         smb2_set_err_rsp(work);
6445                         return -EOPNOTSUPP;
6446                 }
6447                 if (rpc_resp->flags != KSMBD_RPC_OK) {
6448                         rsp->hdr.Status = STATUS_INVALID_HANDLE;
6449                         smb2_set_err_rsp(work);
6450                         kvfree(rpc_resp);
6451                         return ret;
6452                 }
6453                 kvfree(rpc_resp);
6454         }
6455
6456         rsp->StructureSize = cpu_to_le16(17);
6457         rsp->DataOffset = 0;
6458         rsp->Reserved = 0;
6459         rsp->DataLength = cpu_to_le32(length);
6460         rsp->DataRemaining = 0;
6461         rsp->Reserved2 = 0;
6462         err = ksmbd_iov_pin_rsp(work, (void *)rsp,
6463                                 offsetof(struct smb2_write_rsp, Buffer));
6464 out:
6465         if (err) {
6466                 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6467                 smb2_set_err_rsp(work);
6468         }
6469
6470         return err;
6471 }
6472
6473 static ssize_t smb2_write_rdma_channel(struct ksmbd_work *work,
6474                                        struct smb2_write_req *req,
6475                                        struct ksmbd_file *fp,
6476                                        loff_t offset, size_t length, bool sync)
6477 {
6478         char *data_buf;
6479         int ret;
6480         ssize_t nbytes;
6481
6482         data_buf = kvzalloc(length, GFP_KERNEL);
6483         if (!data_buf)
6484                 return -ENOMEM;
6485
6486         ret = ksmbd_conn_rdma_read(work->conn, data_buf, length,
6487                                    (struct smb2_buffer_desc_v1 *)
6488                                    ((char *)req + le16_to_cpu(req->WriteChannelInfoOffset)),
6489                                    le16_to_cpu(req->WriteChannelInfoLength));
6490         if (ret < 0) {
6491                 kvfree(data_buf);
6492                 return ret;
6493         }
6494
6495         ret = ksmbd_vfs_write(work, fp, data_buf, length, &offset, sync, &nbytes);
6496         kvfree(data_buf);
6497         if (ret < 0)
6498                 return ret;
6499
6500         return nbytes;
6501 }
6502
6503 /**
6504  * smb2_write() - handler for smb2 write from file
6505  * @work:       smb work containing write command buffer
6506  *
6507  * Return:      0 on success, otherwise error
6508  */
6509 int smb2_write(struct ksmbd_work *work)
6510 {
6511         struct smb2_write_req *req;
6512         struct smb2_write_rsp *rsp;
6513         struct ksmbd_file *fp = NULL;
6514         loff_t offset;
6515         size_t length;
6516         ssize_t nbytes;
6517         char *data_buf;
6518         bool writethrough = false, is_rdma_channel = false;
6519         int err = 0;
6520         unsigned int max_write_size = work->conn->vals->max_write_size;
6521
6522         WORK_BUFFERS(work, req, rsp);
6523
6524         if (test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_PIPE)) {
6525                 ksmbd_debug(SMB, "IPC pipe write request\n");
6526                 return smb2_write_pipe(work);
6527         }
6528
6529         offset = le64_to_cpu(req->Offset);
6530         length = le32_to_cpu(req->Length);
6531
6532         if (req->Channel == SMB2_CHANNEL_RDMA_V1 ||
6533             req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE) {
6534                 is_rdma_channel = true;
6535                 max_write_size = get_smbd_max_read_write_size();
6536                 length = le32_to_cpu(req->RemainingBytes);
6537         }
6538
6539         if (is_rdma_channel == true) {
6540                 unsigned int ch_offset = le16_to_cpu(req->WriteChannelInfoOffset);
6541
6542                 if (req->Length != 0 || req->DataOffset != 0 ||
6543                     ch_offset < offsetof(struct smb2_write_req, Buffer)) {
6544                         err = -EINVAL;
6545                         goto out;
6546                 }
6547                 err = smb2_set_remote_key_for_rdma(work,
6548                                                    (struct smb2_buffer_desc_v1 *)
6549                                                    ((char *)req + ch_offset),
6550                                                    req->Channel,
6551                                                    req->WriteChannelInfoLength);
6552                 if (err)
6553                         goto out;
6554         }
6555
6556         if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
6557                 ksmbd_debug(SMB, "User does not have write permission\n");
6558                 err = -EACCES;
6559                 goto out;
6560         }
6561
6562         fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
6563         if (!fp) {
6564                 err = -ENOENT;
6565                 goto out;
6566         }
6567
6568         if (!(fp->daccess & (FILE_WRITE_DATA_LE | FILE_READ_ATTRIBUTES_LE))) {
6569                 pr_err("Not permitted to write : 0x%x\n", fp->daccess);
6570                 err = -EACCES;
6571                 goto out;
6572         }
6573
6574         if (length > max_write_size) {
6575                 ksmbd_debug(SMB, "limiting write size to max size(%u)\n",
6576                             max_write_size);
6577                 err = -EINVAL;
6578                 goto out;
6579         }
6580
6581         ksmbd_debug(SMB, "flags %u\n", le32_to_cpu(req->Flags));
6582         if (le32_to_cpu(req->Flags) & SMB2_WRITEFLAG_WRITE_THROUGH)
6583                 writethrough = true;
6584
6585         if (is_rdma_channel == false) {
6586                 if (le16_to_cpu(req->DataOffset) <
6587                     offsetof(struct smb2_write_req, Buffer)) {
6588                         err = -EINVAL;
6589                         goto out;
6590                 }
6591
6592                 data_buf = (char *)(((char *)&req->hdr.ProtocolId) +
6593                                     le16_to_cpu(req->DataOffset));
6594
6595                 ksmbd_debug(SMB, "filename %pD, offset %lld, len %zu\n",
6596                             fp->filp, offset, length);
6597                 err = ksmbd_vfs_write(work, fp, data_buf, length, &offset,
6598                                       writethrough, &nbytes);
6599                 if (err < 0)
6600                         goto out;
6601         } else {
6602                 /* read data from the client using rdma channel, and
6603                  * write the data.
6604                  */
6605                 nbytes = smb2_write_rdma_channel(work, req, fp, offset, length,
6606                                                  writethrough);
6607                 if (nbytes < 0) {
6608                         err = (int)nbytes;
6609                         goto out;
6610                 }
6611         }
6612
6613         rsp->StructureSize = cpu_to_le16(17);
6614         rsp->DataOffset = 0;
6615         rsp->Reserved = 0;
6616         rsp->DataLength = cpu_to_le32(nbytes);
6617         rsp->DataRemaining = 0;
6618         rsp->Reserved2 = 0;
6619         err = ksmbd_iov_pin_rsp(work, rsp, offsetof(struct smb2_write_rsp, Buffer));
6620         if (err)
6621                 goto out;
6622         ksmbd_fd_put(work, fp);
6623         return 0;
6624
6625 out:
6626         if (err == -EAGAIN)
6627                 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
6628         else if (err == -ENOSPC || err == -EFBIG)
6629                 rsp->hdr.Status = STATUS_DISK_FULL;
6630         else if (err == -ENOENT)
6631                 rsp->hdr.Status = STATUS_FILE_CLOSED;
6632         else if (err == -EACCES)
6633                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
6634         else if (err == -ESHARE)
6635                 rsp->hdr.Status = STATUS_SHARING_VIOLATION;
6636         else if (err == -EINVAL)
6637                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
6638         else
6639                 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6640
6641         smb2_set_err_rsp(work);
6642         ksmbd_fd_put(work, fp);
6643         return err;
6644 }
6645
6646 /**
6647  * smb2_flush() - handler for smb2 flush file - fsync
6648  * @work:       smb work containing flush command buffer
6649  *
6650  * Return:      0 on success, otherwise error
6651  */
6652 int smb2_flush(struct ksmbd_work *work)
6653 {
6654         struct smb2_flush_req *req;
6655         struct smb2_flush_rsp *rsp;
6656         int err;
6657
6658         WORK_BUFFERS(work, req, rsp);
6659
6660         ksmbd_debug(SMB, "SMB2_FLUSH called for fid %llu\n", req->VolatileFileId);
6661
6662         err = ksmbd_vfs_fsync(work, req->VolatileFileId, req->PersistentFileId);
6663         if (err)
6664                 goto out;
6665
6666         rsp->StructureSize = cpu_to_le16(4);
6667         rsp->Reserved = 0;
6668         return ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_flush_rsp));
6669
6670 out:
6671         rsp->hdr.Status = STATUS_INVALID_HANDLE;
6672         smb2_set_err_rsp(work);
6673         return err;
6674 }
6675
6676 /**
6677  * smb2_cancel() - handler for smb2 cancel command
6678  * @work:       smb work containing cancel command buffer
6679  *
6680  * Return:      0 on success, otherwise error
6681  */
6682 int smb2_cancel(struct ksmbd_work *work)
6683 {
6684         struct ksmbd_conn *conn = work->conn;
6685         struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
6686         struct smb2_hdr *chdr;
6687         struct ksmbd_work *iter;
6688         struct list_head *command_list;
6689
6690         if (work->next_smb2_rcv_hdr_off)
6691                 hdr = ksmbd_resp_buf_next(work);
6692
6693         ksmbd_debug(SMB, "smb2 cancel called on mid %llu, async flags 0x%x\n",
6694                     hdr->MessageId, hdr->Flags);
6695
6696         if (hdr->Flags & SMB2_FLAGS_ASYNC_COMMAND) {
6697                 command_list = &conn->async_requests;
6698
6699                 spin_lock(&conn->request_lock);
6700                 list_for_each_entry(iter, command_list,
6701                                     async_request_entry) {
6702                         chdr = smb2_get_msg(iter->request_buf);
6703
6704                         if (iter->async_id !=
6705                             le64_to_cpu(hdr->Id.AsyncId))
6706                                 continue;
6707
6708                         ksmbd_debug(SMB,
6709                                     "smb2 with AsyncId %llu cancelled command = 0x%x\n",
6710                                     le64_to_cpu(hdr->Id.AsyncId),
6711                                     le16_to_cpu(chdr->Command));
6712                         iter->state = KSMBD_WORK_CANCELLED;
6713                         if (iter->cancel_fn)
6714                                 iter->cancel_fn(iter->cancel_argv);
6715                         break;
6716                 }
6717                 spin_unlock(&conn->request_lock);
6718         } else {
6719                 command_list = &conn->requests;
6720
6721                 spin_lock(&conn->request_lock);
6722                 list_for_each_entry(iter, command_list, request_entry) {
6723                         chdr = smb2_get_msg(iter->request_buf);
6724
6725                         if (chdr->MessageId != hdr->MessageId ||
6726                             iter == work)
6727                                 continue;
6728
6729                         ksmbd_debug(SMB,
6730                                     "smb2 with mid %llu cancelled command = 0x%x\n",
6731                                     le64_to_cpu(hdr->MessageId),
6732                                     le16_to_cpu(chdr->Command));
6733                         iter->state = KSMBD_WORK_CANCELLED;
6734                         break;
6735                 }
6736                 spin_unlock(&conn->request_lock);
6737         }
6738
6739         /* For SMB2_CANCEL command itself send no response*/
6740         work->send_no_response = 1;
6741         return 0;
6742 }
6743
6744 struct file_lock *smb_flock_init(struct file *f)
6745 {
6746         struct file_lock *fl;
6747
6748         fl = locks_alloc_lock();
6749         if (!fl)
6750                 goto out;
6751
6752         locks_init_lock(fl);
6753
6754         fl->fl_owner = f;
6755         fl->fl_pid = current->tgid;
6756         fl->fl_file = f;
6757         fl->fl_flags = FL_POSIX;
6758         fl->fl_ops = NULL;
6759         fl->fl_lmops = NULL;
6760
6761 out:
6762         return fl;
6763 }
6764
6765 static int smb2_set_flock_flags(struct file_lock *flock, int flags)
6766 {
6767         int cmd = -EINVAL;
6768
6769         /* Checking for wrong flag combination during lock request*/
6770         switch (flags) {
6771         case SMB2_LOCKFLAG_SHARED:
6772                 ksmbd_debug(SMB, "received shared request\n");
6773                 cmd = F_SETLKW;
6774                 flock->fl_type = F_RDLCK;
6775                 flock->fl_flags |= FL_SLEEP;
6776                 break;
6777         case SMB2_LOCKFLAG_EXCLUSIVE:
6778                 ksmbd_debug(SMB, "received exclusive request\n");
6779                 cmd = F_SETLKW;
6780                 flock->fl_type = F_WRLCK;
6781                 flock->fl_flags |= FL_SLEEP;
6782                 break;
6783         case SMB2_LOCKFLAG_SHARED | SMB2_LOCKFLAG_FAIL_IMMEDIATELY:
6784                 ksmbd_debug(SMB,
6785                             "received shared & fail immediately request\n");
6786                 cmd = F_SETLK;
6787                 flock->fl_type = F_RDLCK;
6788                 break;
6789         case SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_FAIL_IMMEDIATELY:
6790                 ksmbd_debug(SMB,
6791                             "received exclusive & fail immediately request\n");
6792                 cmd = F_SETLK;
6793                 flock->fl_type = F_WRLCK;
6794                 break;
6795         case SMB2_LOCKFLAG_UNLOCK:
6796                 ksmbd_debug(SMB, "received unlock request\n");
6797                 flock->fl_type = F_UNLCK;
6798                 cmd = F_SETLK;
6799                 break;
6800         }
6801
6802         return cmd;
6803 }
6804
6805 static struct ksmbd_lock *smb2_lock_init(struct file_lock *flock,
6806                                          unsigned int cmd, int flags,
6807                                          struct list_head *lock_list)
6808 {
6809         struct ksmbd_lock *lock;
6810
6811         lock = kzalloc(sizeof(struct ksmbd_lock), GFP_KERNEL);
6812         if (!lock)
6813                 return NULL;
6814
6815         lock->cmd = cmd;
6816         lock->fl = flock;
6817         lock->start = flock->fl_start;
6818         lock->end = flock->fl_end;
6819         lock->flags = flags;
6820         if (lock->start == lock->end)
6821                 lock->zero_len = 1;
6822         INIT_LIST_HEAD(&lock->clist);
6823         INIT_LIST_HEAD(&lock->flist);
6824         INIT_LIST_HEAD(&lock->llist);
6825         list_add_tail(&lock->llist, lock_list);
6826
6827         return lock;
6828 }
6829
6830 static void smb2_remove_blocked_lock(void **argv)
6831 {
6832         struct file_lock *flock = (struct file_lock *)argv[0];
6833
6834         ksmbd_vfs_posix_lock_unblock(flock);
6835         wake_up(&flock->fl_wait);
6836 }
6837
6838 static inline bool lock_defer_pending(struct file_lock *fl)
6839 {
6840         /* check pending lock waiters */
6841         return waitqueue_active(&fl->fl_wait);
6842 }
6843
6844 /**
6845  * smb2_lock() - handler for smb2 file lock command
6846  * @work:       smb work containing lock command buffer
6847  *
6848  * Return:      0 on success, otherwise error
6849  */
6850 int smb2_lock(struct ksmbd_work *work)
6851 {
6852         struct smb2_lock_req *req;
6853         struct smb2_lock_rsp *rsp;
6854         struct smb2_lock_element *lock_ele;
6855         struct ksmbd_file *fp = NULL;
6856         struct file_lock *flock = NULL;
6857         struct file *filp = NULL;
6858         int lock_count;
6859         int flags = 0;
6860         int cmd = 0;
6861         int err = -EIO, i, rc = 0;
6862         u64 lock_start, lock_length;
6863         struct ksmbd_lock *smb_lock = NULL, *cmp_lock, *tmp, *tmp2;
6864         struct ksmbd_conn *conn;
6865         int nolock = 0;
6866         LIST_HEAD(lock_list);
6867         LIST_HEAD(rollback_list);
6868         int prior_lock = 0;
6869
6870         WORK_BUFFERS(work, req, rsp);
6871
6872         ksmbd_debug(SMB, "Received lock request\n");
6873         fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
6874         if (!fp) {
6875                 ksmbd_debug(SMB, "Invalid file id for lock : %llu\n", req->VolatileFileId);
6876                 err = -ENOENT;
6877                 goto out2;
6878         }
6879
6880         filp = fp->filp;
6881         lock_count = le16_to_cpu(req->LockCount);
6882         lock_ele = req->locks;
6883
6884         ksmbd_debug(SMB, "lock count is %d\n", lock_count);
6885         if (!lock_count) {
6886                 err = -EINVAL;
6887                 goto out2;
6888         }
6889
6890         for (i = 0; i < lock_count; i++) {
6891                 flags = le32_to_cpu(lock_ele[i].Flags);
6892
6893                 flock = smb_flock_init(filp);
6894                 if (!flock)
6895                         goto out;
6896
6897                 cmd = smb2_set_flock_flags(flock, flags);
6898
6899                 lock_start = le64_to_cpu(lock_ele[i].Offset);
6900                 lock_length = le64_to_cpu(lock_ele[i].Length);
6901                 if (lock_start > U64_MAX - lock_length) {
6902                         pr_err("Invalid lock range requested\n");
6903                         rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE;
6904                         locks_free_lock(flock);
6905                         goto out;
6906                 }
6907
6908                 if (lock_start > OFFSET_MAX)
6909                         flock->fl_start = OFFSET_MAX;
6910                 else
6911                         flock->fl_start = lock_start;
6912
6913                 lock_length = le64_to_cpu(lock_ele[i].Length);
6914                 if (lock_length > OFFSET_MAX - flock->fl_start)
6915                         lock_length = OFFSET_MAX - flock->fl_start;
6916
6917                 flock->fl_end = flock->fl_start + lock_length;
6918
6919                 if (flock->fl_end < flock->fl_start) {
6920                         ksmbd_debug(SMB,
6921                                     "the end offset(%llx) is smaller than the start offset(%llx)\n",
6922                                     flock->fl_end, flock->fl_start);
6923                         rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE;
6924                         locks_free_lock(flock);
6925                         goto out;
6926                 }
6927
6928                 /* Check conflict locks in one request */
6929                 list_for_each_entry(cmp_lock, &lock_list, llist) {
6930                         if (cmp_lock->fl->fl_start <= flock->fl_start &&
6931                             cmp_lock->fl->fl_end >= flock->fl_end) {
6932                                 if (cmp_lock->fl->fl_type != F_UNLCK &&
6933                                     flock->fl_type != F_UNLCK) {
6934                                         pr_err("conflict two locks in one request\n");
6935                                         err = -EINVAL;
6936                                         locks_free_lock(flock);
6937                                         goto out;
6938                                 }
6939                         }
6940                 }
6941
6942                 smb_lock = smb2_lock_init(flock, cmd, flags, &lock_list);
6943                 if (!smb_lock) {
6944                         err = -EINVAL;
6945                         locks_free_lock(flock);
6946                         goto out;
6947                 }
6948         }
6949
6950         list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) {
6951                 if (smb_lock->cmd < 0) {
6952                         err = -EINVAL;
6953                         goto out;
6954                 }
6955
6956                 if (!(smb_lock->flags & SMB2_LOCKFLAG_MASK)) {
6957                         err = -EINVAL;
6958                         goto out;
6959                 }
6960
6961                 if ((prior_lock & (SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_SHARED) &&
6962                      smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) ||
6963                     (prior_lock == SMB2_LOCKFLAG_UNLOCK &&
6964                      !(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK))) {
6965                         err = -EINVAL;
6966                         goto out;
6967                 }
6968
6969                 prior_lock = smb_lock->flags;
6970
6971                 if (!(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) &&
6972                     !(smb_lock->flags & SMB2_LOCKFLAG_FAIL_IMMEDIATELY))
6973                         goto no_check_cl;
6974
6975                 nolock = 1;
6976                 /* check locks in connection list */
6977                 down_read(&conn_list_lock);
6978                 list_for_each_entry(conn, &conn_list, conns_list) {
6979                         spin_lock(&conn->llist_lock);
6980                         list_for_each_entry_safe(cmp_lock, tmp2, &conn->lock_list, clist) {
6981                                 if (file_inode(cmp_lock->fl->fl_file) !=
6982                                     file_inode(smb_lock->fl->fl_file))
6983                                         continue;
6984
6985                                 if (smb_lock->fl->fl_type == F_UNLCK) {
6986                                         if (cmp_lock->fl->fl_file == smb_lock->fl->fl_file &&
6987                                             cmp_lock->start == smb_lock->start &&
6988                                             cmp_lock->end == smb_lock->end &&
6989                                             !lock_defer_pending(cmp_lock->fl)) {
6990                                                 nolock = 0;
6991                                                 list_del(&cmp_lock->flist);
6992                                                 list_del(&cmp_lock->clist);
6993                                                 spin_unlock(&conn->llist_lock);
6994                                                 up_read(&conn_list_lock);
6995
6996                                                 locks_free_lock(cmp_lock->fl);
6997                                                 kfree(cmp_lock);
6998                                                 goto out_check_cl;
6999                                         }
7000                                         continue;
7001                                 }
7002
7003                                 if (cmp_lock->fl->fl_file == smb_lock->fl->fl_file) {
7004                                         if (smb_lock->flags & SMB2_LOCKFLAG_SHARED)
7005                                                 continue;
7006                                 } else {
7007                                         if (cmp_lock->flags & SMB2_LOCKFLAG_SHARED)
7008                                                 continue;
7009                                 }
7010
7011                                 /* check zero byte lock range */
7012                                 if (cmp_lock->zero_len && !smb_lock->zero_len &&
7013                                     cmp_lock->start > smb_lock->start &&
7014                                     cmp_lock->start < smb_lock->end) {
7015                                         spin_unlock(&conn->llist_lock);
7016                                         up_read(&conn_list_lock);
7017                                         pr_err("previous lock conflict with zero byte lock range\n");
7018                                         goto out;
7019                                 }
7020
7021                                 if (smb_lock->zero_len && !cmp_lock->zero_len &&
7022                                     smb_lock->start > cmp_lock->start &&
7023                                     smb_lock->start < cmp_lock->end) {
7024                                         spin_unlock(&conn->llist_lock);
7025                                         up_read(&conn_list_lock);
7026                                         pr_err("current lock conflict with zero byte lock range\n");
7027                                         goto out;
7028                                 }
7029
7030                                 if (((cmp_lock->start <= smb_lock->start &&
7031                                       cmp_lock->end > smb_lock->start) ||
7032                                      (cmp_lock->start < smb_lock->end &&
7033                                       cmp_lock->end >= smb_lock->end)) &&
7034                                     !cmp_lock->zero_len && !smb_lock->zero_len) {
7035                                         spin_unlock(&conn->llist_lock);
7036                                         up_read(&conn_list_lock);
7037                                         pr_err("Not allow lock operation on exclusive lock range\n");
7038                                         goto out;
7039                                 }
7040                         }
7041                         spin_unlock(&conn->llist_lock);
7042                 }
7043                 up_read(&conn_list_lock);
7044 out_check_cl:
7045                 if (smb_lock->fl->fl_type == F_UNLCK && nolock) {
7046                         pr_err("Try to unlock nolocked range\n");
7047                         rsp->hdr.Status = STATUS_RANGE_NOT_LOCKED;
7048                         goto out;
7049                 }
7050
7051 no_check_cl:
7052                 if (smb_lock->zero_len) {
7053                         err = 0;
7054                         goto skip;
7055                 }
7056
7057                 flock = smb_lock->fl;
7058                 list_del(&smb_lock->llist);
7059 retry:
7060                 rc = vfs_lock_file(filp, smb_lock->cmd, flock, NULL);
7061 skip:
7062                 if (flags & SMB2_LOCKFLAG_UNLOCK) {
7063                         if (!rc) {
7064                                 ksmbd_debug(SMB, "File unlocked\n");
7065                         } else if (rc == -ENOENT) {
7066                                 rsp->hdr.Status = STATUS_NOT_LOCKED;
7067                                 goto out;
7068                         }
7069                         locks_free_lock(flock);
7070                         kfree(smb_lock);
7071                 } else {
7072                         if (rc == FILE_LOCK_DEFERRED) {
7073                                 void **argv;
7074
7075                                 ksmbd_debug(SMB,
7076                                             "would have to wait for getting lock\n");
7077                                 list_add(&smb_lock->llist, &rollback_list);
7078
7079                                 argv = kmalloc(sizeof(void *), GFP_KERNEL);
7080                                 if (!argv) {
7081                                         err = -ENOMEM;
7082                                         goto out;
7083                                 }
7084                                 argv[0] = flock;
7085
7086                                 rc = setup_async_work(work,
7087                                                       smb2_remove_blocked_lock,
7088                                                       argv);
7089                                 if (rc) {
7090                                         kfree(argv);
7091                                         err = -ENOMEM;
7092                                         goto out;
7093                                 }
7094                                 spin_lock(&fp->f_lock);
7095                                 list_add(&work->fp_entry, &fp->blocked_works);
7096                                 spin_unlock(&fp->f_lock);
7097
7098                                 smb2_send_interim_resp(work, STATUS_PENDING);
7099
7100                                 ksmbd_vfs_posix_lock_wait(flock);
7101
7102                                 spin_lock(&fp->f_lock);
7103                                 list_del(&work->fp_entry);
7104                                 spin_unlock(&fp->f_lock);
7105
7106                                 if (work->state != KSMBD_WORK_ACTIVE) {
7107                                         list_del(&smb_lock->llist);
7108                                         locks_free_lock(flock);
7109
7110                                         if (work->state == KSMBD_WORK_CANCELLED) {
7111                                                 rsp->hdr.Status =
7112                                                         STATUS_CANCELLED;
7113                                                 kfree(smb_lock);
7114                                                 smb2_send_interim_resp(work,
7115                                                                        STATUS_CANCELLED);
7116                                                 work->send_no_response = 1;
7117                                                 goto out;
7118                                         }
7119
7120                                         rsp->hdr.Status =
7121                                                 STATUS_RANGE_NOT_LOCKED;
7122                                         kfree(smb_lock);
7123                                         goto out2;
7124                                 }
7125
7126                                 list_del(&smb_lock->llist);
7127                                 release_async_work(work);
7128                                 goto retry;
7129                         } else if (!rc) {
7130                                 list_add(&smb_lock->llist, &rollback_list);
7131                                 spin_lock(&work->conn->llist_lock);
7132                                 list_add_tail(&smb_lock->clist,
7133                                               &work->conn->lock_list);
7134                                 list_add_tail(&smb_lock->flist,
7135                                               &fp->lock_list);
7136                                 spin_unlock(&work->conn->llist_lock);
7137                                 ksmbd_debug(SMB, "successful in taking lock\n");
7138                         } else {
7139                                 goto out;
7140                         }
7141                 }
7142         }
7143
7144         if (atomic_read(&fp->f_ci->op_count) > 1)
7145                 smb_break_all_oplock(work, fp);
7146
7147         rsp->StructureSize = cpu_to_le16(4);
7148         ksmbd_debug(SMB, "successful in taking lock\n");
7149         rsp->hdr.Status = STATUS_SUCCESS;
7150         rsp->Reserved = 0;
7151         err = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_lock_rsp));
7152         if (err)
7153                 goto out;
7154
7155         ksmbd_fd_put(work, fp);
7156         return 0;
7157
7158 out:
7159         list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) {
7160                 locks_free_lock(smb_lock->fl);
7161                 list_del(&smb_lock->llist);
7162                 kfree(smb_lock);
7163         }
7164
7165         list_for_each_entry_safe(smb_lock, tmp, &rollback_list, llist) {
7166                 struct file_lock *rlock = NULL;
7167
7168                 rlock = smb_flock_init(filp);
7169                 rlock->fl_type = F_UNLCK;
7170                 rlock->fl_start = smb_lock->start;
7171                 rlock->fl_end = smb_lock->end;
7172
7173                 rc = vfs_lock_file(filp, F_SETLK, rlock, NULL);
7174                 if (rc)
7175                         pr_err("rollback unlock fail : %d\n", rc);
7176
7177                 list_del(&smb_lock->llist);
7178                 spin_lock(&work->conn->llist_lock);
7179                 if (!list_empty(&smb_lock->flist))
7180                         list_del(&smb_lock->flist);
7181                 list_del(&smb_lock->clist);
7182                 spin_unlock(&work->conn->llist_lock);
7183
7184                 locks_free_lock(smb_lock->fl);
7185                 locks_free_lock(rlock);
7186                 kfree(smb_lock);
7187         }
7188 out2:
7189         ksmbd_debug(SMB, "failed in taking lock(flags : %x), err : %d\n", flags, err);
7190
7191         if (!rsp->hdr.Status) {
7192                 if (err == -EINVAL)
7193                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7194                 else if (err == -ENOMEM)
7195                         rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
7196                 else if (err == -ENOENT)
7197                         rsp->hdr.Status = STATUS_FILE_CLOSED;
7198                 else
7199                         rsp->hdr.Status = STATUS_LOCK_NOT_GRANTED;
7200         }
7201
7202         smb2_set_err_rsp(work);
7203         ksmbd_fd_put(work, fp);
7204         return err;
7205 }
7206
7207 static int fsctl_copychunk(struct ksmbd_work *work,
7208                            struct copychunk_ioctl_req *ci_req,
7209                            unsigned int cnt_code,
7210                            unsigned int input_count,
7211                            unsigned long long volatile_id,
7212                            unsigned long long persistent_id,
7213                            struct smb2_ioctl_rsp *rsp)
7214 {
7215         struct copychunk_ioctl_rsp *ci_rsp;
7216         struct ksmbd_file *src_fp = NULL, *dst_fp = NULL;
7217         struct srv_copychunk *chunks;
7218         unsigned int i, chunk_count, chunk_count_written = 0;
7219         unsigned int chunk_size_written = 0;
7220         loff_t total_size_written = 0;
7221         int ret = 0;
7222
7223         ci_rsp = (struct copychunk_ioctl_rsp *)&rsp->Buffer[0];
7224
7225         rsp->VolatileFileId = volatile_id;
7226         rsp->PersistentFileId = persistent_id;
7227         ci_rsp->ChunksWritten =
7228                 cpu_to_le32(ksmbd_server_side_copy_max_chunk_count());
7229         ci_rsp->ChunkBytesWritten =
7230                 cpu_to_le32(ksmbd_server_side_copy_max_chunk_size());
7231         ci_rsp->TotalBytesWritten =
7232                 cpu_to_le32(ksmbd_server_side_copy_max_total_size());
7233
7234         chunks = (struct srv_copychunk *)&ci_req->Chunks[0];
7235         chunk_count = le32_to_cpu(ci_req->ChunkCount);
7236         if (chunk_count == 0)
7237                 goto out;
7238         total_size_written = 0;
7239
7240         /* verify the SRV_COPYCHUNK_COPY packet */
7241         if (chunk_count > ksmbd_server_side_copy_max_chunk_count() ||
7242             input_count < offsetof(struct copychunk_ioctl_req, Chunks) +
7243              chunk_count * sizeof(struct srv_copychunk)) {
7244                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7245                 return -EINVAL;
7246         }
7247
7248         for (i = 0; i < chunk_count; i++) {
7249                 if (le32_to_cpu(chunks[i].Length) == 0 ||
7250                     le32_to_cpu(chunks[i].Length) > ksmbd_server_side_copy_max_chunk_size())
7251                         break;
7252                 total_size_written += le32_to_cpu(chunks[i].Length);
7253         }
7254
7255         if (i < chunk_count ||
7256             total_size_written > ksmbd_server_side_copy_max_total_size()) {
7257                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7258                 return -EINVAL;
7259         }
7260
7261         src_fp = ksmbd_lookup_foreign_fd(work,
7262                                          le64_to_cpu(ci_req->ResumeKey[0]));
7263         dst_fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id);
7264         ret = -EINVAL;
7265         if (!src_fp ||
7266             src_fp->persistent_id != le64_to_cpu(ci_req->ResumeKey[1])) {
7267                 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
7268                 goto out;
7269         }
7270
7271         if (!dst_fp) {
7272                 rsp->hdr.Status = STATUS_FILE_CLOSED;
7273                 goto out;
7274         }
7275
7276         /*
7277          * FILE_READ_DATA should only be included in
7278          * the FSCTL_COPYCHUNK case
7279          */
7280         if (cnt_code == FSCTL_COPYCHUNK &&
7281             !(dst_fp->daccess & (FILE_READ_DATA_LE | FILE_GENERIC_READ_LE))) {
7282                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
7283                 goto out;
7284         }
7285
7286         ret = ksmbd_vfs_copy_file_ranges(work, src_fp, dst_fp,
7287                                          chunks, chunk_count,
7288                                          &chunk_count_written,
7289                                          &chunk_size_written,
7290                                          &total_size_written);
7291         if (ret < 0) {
7292                 if (ret == -EACCES)
7293                         rsp->hdr.Status = STATUS_ACCESS_DENIED;
7294                 if (ret == -EAGAIN)
7295                         rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
7296                 else if (ret == -EBADF)
7297                         rsp->hdr.Status = STATUS_INVALID_HANDLE;
7298                 else if (ret == -EFBIG || ret == -ENOSPC)
7299                         rsp->hdr.Status = STATUS_DISK_FULL;
7300                 else if (ret == -EINVAL)
7301                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7302                 else if (ret == -EISDIR)
7303                         rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
7304                 else if (ret == -E2BIG)
7305                         rsp->hdr.Status = STATUS_INVALID_VIEW_SIZE;
7306                 else
7307                         rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
7308         }
7309
7310         ci_rsp->ChunksWritten = cpu_to_le32(chunk_count_written);
7311         ci_rsp->ChunkBytesWritten = cpu_to_le32(chunk_size_written);
7312         ci_rsp->TotalBytesWritten = cpu_to_le32(total_size_written);
7313 out:
7314         ksmbd_fd_put(work, src_fp);
7315         ksmbd_fd_put(work, dst_fp);
7316         return ret;
7317 }
7318
7319 static __be32 idev_ipv4_address(struct in_device *idev)
7320 {
7321         __be32 addr = 0;
7322
7323         struct in_ifaddr *ifa;
7324
7325         rcu_read_lock();
7326         in_dev_for_each_ifa_rcu(ifa, idev) {
7327                 if (ifa->ifa_flags & IFA_F_SECONDARY)
7328                         continue;
7329
7330                 addr = ifa->ifa_address;
7331                 break;
7332         }
7333         rcu_read_unlock();
7334         return addr;
7335 }
7336
7337 static int fsctl_query_iface_info_ioctl(struct ksmbd_conn *conn,
7338                                         struct smb2_ioctl_rsp *rsp,
7339                                         unsigned int out_buf_len)
7340 {
7341         struct network_interface_info_ioctl_rsp *nii_rsp = NULL;
7342         int nbytes = 0;
7343         struct net_device *netdev;
7344         struct sockaddr_storage_rsp *sockaddr_storage;
7345         unsigned int flags;
7346         unsigned long long speed;
7347
7348         rtnl_lock();
7349         for_each_netdev(&init_net, netdev) {
7350                 bool ipv4_set = false;
7351
7352                 if (netdev->type == ARPHRD_LOOPBACK)
7353                         continue;
7354
7355                 flags = dev_get_flags(netdev);
7356                 if (!(flags & IFF_RUNNING))
7357                         continue;
7358 ipv6_retry:
7359                 if (out_buf_len <
7360                     nbytes + sizeof(struct network_interface_info_ioctl_rsp)) {
7361                         rtnl_unlock();
7362                         return -ENOSPC;
7363                 }
7364
7365                 nii_rsp = (struct network_interface_info_ioctl_rsp *)
7366                                 &rsp->Buffer[nbytes];
7367                 nii_rsp->IfIndex = cpu_to_le32(netdev->ifindex);
7368
7369                 nii_rsp->Capability = 0;
7370                 if (netdev->real_num_tx_queues > 1)
7371                         nii_rsp->Capability |= cpu_to_le32(RSS_CAPABLE);
7372                 if (ksmbd_rdma_capable_netdev(netdev))
7373                         nii_rsp->Capability |= cpu_to_le32(RDMA_CAPABLE);
7374
7375                 nii_rsp->Next = cpu_to_le32(152);
7376                 nii_rsp->Reserved = 0;
7377
7378                 if (netdev->ethtool_ops->get_link_ksettings) {
7379                         struct ethtool_link_ksettings cmd;
7380
7381                         netdev->ethtool_ops->get_link_ksettings(netdev, &cmd);
7382                         speed = cmd.base.speed;
7383                 } else {
7384                         ksmbd_debug(SMB, "%s %s\n", netdev->name,
7385                                     "speed is unknown, defaulting to 1Gb/sec");
7386                         speed = SPEED_1000;
7387                 }
7388
7389                 speed *= 1000000;
7390                 nii_rsp->LinkSpeed = cpu_to_le64(speed);
7391
7392                 sockaddr_storage = (struct sockaddr_storage_rsp *)
7393                                         nii_rsp->SockAddr_Storage;
7394                 memset(sockaddr_storage, 0, 128);
7395
7396                 if (!ipv4_set) {
7397                         struct in_device *idev;
7398
7399                         sockaddr_storage->Family = cpu_to_le16(INTERNETWORK);
7400                         sockaddr_storage->addr4.Port = 0;
7401
7402                         idev = __in_dev_get_rtnl(netdev);
7403                         if (!idev)
7404                                 continue;
7405                         sockaddr_storage->addr4.IPv4address =
7406                                                 idev_ipv4_address(idev);
7407                         nbytes += sizeof(struct network_interface_info_ioctl_rsp);
7408                         ipv4_set = true;
7409                         goto ipv6_retry;
7410                 } else {
7411                         struct inet6_dev *idev6;
7412                         struct inet6_ifaddr *ifa;
7413                         __u8 *ipv6_addr = sockaddr_storage->addr6.IPv6address;
7414
7415                         sockaddr_storage->Family = cpu_to_le16(INTERNETWORKV6);
7416                         sockaddr_storage->addr6.Port = 0;
7417                         sockaddr_storage->addr6.FlowInfo = 0;
7418
7419                         idev6 = __in6_dev_get(netdev);
7420                         if (!idev6)
7421                                 continue;
7422
7423                         list_for_each_entry(ifa, &idev6->addr_list, if_list) {
7424                                 if (ifa->flags & (IFA_F_TENTATIVE |
7425                                                         IFA_F_DEPRECATED))
7426                                         continue;
7427                                 memcpy(ipv6_addr, ifa->addr.s6_addr, 16);
7428                                 break;
7429                         }
7430                         sockaddr_storage->addr6.ScopeId = 0;
7431                         nbytes += sizeof(struct network_interface_info_ioctl_rsp);
7432                 }
7433         }
7434         rtnl_unlock();
7435
7436         /* zero if this is last one */
7437         if (nii_rsp)
7438                 nii_rsp->Next = 0;
7439
7440         rsp->PersistentFileId = SMB2_NO_FID;
7441         rsp->VolatileFileId = SMB2_NO_FID;
7442         return nbytes;
7443 }
7444
7445 static int fsctl_validate_negotiate_info(struct ksmbd_conn *conn,
7446                                          struct validate_negotiate_info_req *neg_req,
7447                                          struct validate_negotiate_info_rsp *neg_rsp,
7448                                          unsigned int in_buf_len)
7449 {
7450         int ret = 0;
7451         int dialect;
7452
7453         if (in_buf_len < offsetof(struct validate_negotiate_info_req, Dialects) +
7454                         le16_to_cpu(neg_req->DialectCount) * sizeof(__le16))
7455                 return -EINVAL;
7456
7457         dialect = ksmbd_lookup_dialect_by_id(neg_req->Dialects,
7458                                              neg_req->DialectCount);
7459         if (dialect == BAD_PROT_ID || dialect != conn->dialect) {
7460                 ret = -EINVAL;
7461                 goto err_out;
7462         }
7463
7464         if (strncmp(neg_req->Guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE)) {
7465                 ret = -EINVAL;
7466                 goto err_out;
7467         }
7468
7469         if (le16_to_cpu(neg_req->SecurityMode) != conn->cli_sec_mode) {
7470                 ret = -EINVAL;
7471                 goto err_out;
7472         }
7473
7474         if (le32_to_cpu(neg_req->Capabilities) != conn->cli_cap) {
7475                 ret = -EINVAL;
7476                 goto err_out;
7477         }
7478
7479         neg_rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
7480         memset(neg_rsp->Guid, 0, SMB2_CLIENT_GUID_SIZE);
7481         neg_rsp->SecurityMode = cpu_to_le16(conn->srv_sec_mode);
7482         neg_rsp->Dialect = cpu_to_le16(conn->dialect);
7483 err_out:
7484         return ret;
7485 }
7486
7487 static int fsctl_query_allocated_ranges(struct ksmbd_work *work, u64 id,
7488                                         struct file_allocated_range_buffer *qar_req,
7489                                         struct file_allocated_range_buffer *qar_rsp,
7490                                         unsigned int in_count, unsigned int *out_count)
7491 {
7492         struct ksmbd_file *fp;
7493         loff_t start, length;
7494         int ret = 0;
7495
7496         *out_count = 0;
7497         if (in_count == 0)
7498                 return -EINVAL;
7499
7500         start = le64_to_cpu(qar_req->file_offset);
7501         length = le64_to_cpu(qar_req->length);
7502
7503         if (start < 0 || length < 0)
7504                 return -EINVAL;
7505
7506         fp = ksmbd_lookup_fd_fast(work, id);
7507         if (!fp)
7508                 return -ENOENT;
7509
7510         ret = ksmbd_vfs_fqar_lseek(fp, start, length,
7511                                    qar_rsp, in_count, out_count);
7512         if (ret && ret != -E2BIG)
7513                 *out_count = 0;
7514
7515         ksmbd_fd_put(work, fp);
7516         return ret;
7517 }
7518
7519 static int fsctl_pipe_transceive(struct ksmbd_work *work, u64 id,
7520                                  unsigned int out_buf_len,
7521                                  struct smb2_ioctl_req *req,
7522                                  struct smb2_ioctl_rsp *rsp)
7523 {
7524         struct ksmbd_rpc_command *rpc_resp;
7525         char *data_buf = (char *)&req->Buffer[0];
7526         int nbytes = 0;
7527
7528         rpc_resp = ksmbd_rpc_ioctl(work->sess, id, data_buf,
7529                                    le32_to_cpu(req->InputCount));
7530         if (rpc_resp) {
7531                 if (rpc_resp->flags == KSMBD_RPC_SOME_NOT_MAPPED) {
7532                         /*
7533                          * set STATUS_SOME_NOT_MAPPED response
7534                          * for unknown domain sid.
7535                          */
7536                         rsp->hdr.Status = STATUS_SOME_NOT_MAPPED;
7537                 } else if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) {
7538                         rsp->hdr.Status = STATUS_NOT_SUPPORTED;
7539                         goto out;
7540                 } else if (rpc_resp->flags != KSMBD_RPC_OK) {
7541                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7542                         goto out;
7543                 }
7544
7545                 nbytes = rpc_resp->payload_sz;
7546                 if (rpc_resp->payload_sz > out_buf_len) {
7547                         rsp->hdr.Status = STATUS_BUFFER_OVERFLOW;
7548                         nbytes = out_buf_len;
7549                 }
7550
7551                 if (!rpc_resp->payload_sz) {
7552                         rsp->hdr.Status =
7553                                 STATUS_UNEXPECTED_IO_ERROR;
7554                         goto out;
7555                 }
7556
7557                 memcpy((char *)rsp->Buffer, rpc_resp->payload, nbytes);
7558         }
7559 out:
7560         kvfree(rpc_resp);
7561         return nbytes;
7562 }
7563
7564 static inline int fsctl_set_sparse(struct ksmbd_work *work, u64 id,
7565                                    struct file_sparse *sparse)
7566 {
7567         struct ksmbd_file *fp;
7568         struct mnt_idmap *idmap;
7569         int ret = 0;
7570         __le32 old_fattr;
7571
7572         fp = ksmbd_lookup_fd_fast(work, id);
7573         if (!fp)
7574                 return -ENOENT;
7575         idmap = file_mnt_idmap(fp->filp);
7576
7577         old_fattr = fp->f_ci->m_fattr;
7578         if (sparse->SetSparse)
7579                 fp->f_ci->m_fattr |= FILE_ATTRIBUTE_SPARSE_FILE_LE;
7580         else
7581                 fp->f_ci->m_fattr &= ~FILE_ATTRIBUTE_SPARSE_FILE_LE;
7582
7583         if (fp->f_ci->m_fattr != old_fattr &&
7584             test_share_config_flag(work->tcon->share_conf,
7585                                    KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) {
7586                 struct xattr_dos_attrib da;
7587
7588                 ret = ksmbd_vfs_get_dos_attrib_xattr(idmap,
7589                                                      fp->filp->f_path.dentry, &da);
7590                 if (ret <= 0)
7591                         goto out;
7592
7593                 da.attr = le32_to_cpu(fp->f_ci->m_fattr);
7594                 ret = ksmbd_vfs_set_dos_attrib_xattr(idmap,
7595                                                      &fp->filp->f_path,
7596                                                      &da, true);
7597                 if (ret)
7598                         fp->f_ci->m_fattr = old_fattr;
7599         }
7600
7601 out:
7602         ksmbd_fd_put(work, fp);
7603         return ret;
7604 }
7605
7606 static int fsctl_request_resume_key(struct ksmbd_work *work,
7607                                     struct smb2_ioctl_req *req,
7608                                     struct resume_key_ioctl_rsp *key_rsp)
7609 {
7610         struct ksmbd_file *fp;
7611
7612         fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
7613         if (!fp)
7614                 return -ENOENT;
7615
7616         memset(key_rsp, 0, sizeof(*key_rsp));
7617         key_rsp->ResumeKey[0] = req->VolatileFileId;
7618         key_rsp->ResumeKey[1] = req->PersistentFileId;
7619         ksmbd_fd_put(work, fp);
7620
7621         return 0;
7622 }
7623
7624 /**
7625  * smb2_ioctl() - handler for smb2 ioctl command
7626  * @work:       smb work containing ioctl command buffer
7627  *
7628  * Return:      0 on success, otherwise error
7629  */
7630 int smb2_ioctl(struct ksmbd_work *work)
7631 {
7632         struct smb2_ioctl_req *req;
7633         struct smb2_ioctl_rsp *rsp;
7634         unsigned int cnt_code, nbytes = 0, out_buf_len, in_buf_len;
7635         u64 id = KSMBD_NO_FID;
7636         struct ksmbd_conn *conn = work->conn;
7637         int ret = 0;
7638
7639         if (work->next_smb2_rcv_hdr_off) {
7640                 req = ksmbd_req_buf_next(work);
7641                 rsp = ksmbd_resp_buf_next(work);
7642                 if (!has_file_id(req->VolatileFileId)) {
7643                         ksmbd_debug(SMB, "Compound request set FID = %llu\n",
7644                                     work->compound_fid);
7645                         id = work->compound_fid;
7646                 }
7647         } else {
7648                 req = smb2_get_msg(work->request_buf);
7649                 rsp = smb2_get_msg(work->response_buf);
7650         }
7651
7652         if (!has_file_id(id))
7653                 id = req->VolatileFileId;
7654
7655         if (req->Flags != cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL)) {
7656                 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
7657                 goto out;
7658         }
7659
7660         cnt_code = le32_to_cpu(req->CtlCode);
7661         ret = smb2_calc_max_out_buf_len(work, 48,
7662                                         le32_to_cpu(req->MaxOutputResponse));
7663         if (ret < 0) {
7664                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7665                 goto out;
7666         }
7667         out_buf_len = (unsigned int)ret;
7668         in_buf_len = le32_to_cpu(req->InputCount);
7669
7670         switch (cnt_code) {
7671         case FSCTL_DFS_GET_REFERRALS:
7672         case FSCTL_DFS_GET_REFERRALS_EX:
7673                 /* Not support DFS yet */
7674                 rsp->hdr.Status = STATUS_FS_DRIVER_REQUIRED;
7675                 goto out;
7676         case FSCTL_CREATE_OR_GET_OBJECT_ID:
7677         {
7678                 struct file_object_buf_type1_ioctl_rsp *obj_buf;
7679
7680                 nbytes = sizeof(struct file_object_buf_type1_ioctl_rsp);
7681                 obj_buf = (struct file_object_buf_type1_ioctl_rsp *)
7682                         &rsp->Buffer[0];
7683
7684                 /*
7685                  * TODO: This is dummy implementation to pass smbtorture
7686                  * Need to check correct response later
7687                  */
7688                 memset(obj_buf->ObjectId, 0x0, 16);
7689                 memset(obj_buf->BirthVolumeId, 0x0, 16);
7690                 memset(obj_buf->BirthObjectId, 0x0, 16);
7691                 memset(obj_buf->DomainId, 0x0, 16);
7692
7693                 break;
7694         }
7695         case FSCTL_PIPE_TRANSCEIVE:
7696                 out_buf_len = min_t(u32, KSMBD_IPC_MAX_PAYLOAD, out_buf_len);
7697                 nbytes = fsctl_pipe_transceive(work, id, out_buf_len, req, rsp);
7698                 break;
7699         case FSCTL_VALIDATE_NEGOTIATE_INFO:
7700                 if (conn->dialect < SMB30_PROT_ID) {
7701                         ret = -EOPNOTSUPP;
7702                         goto out;
7703                 }
7704
7705                 if (in_buf_len < offsetof(struct validate_negotiate_info_req,
7706                                           Dialects)) {
7707                         ret = -EINVAL;
7708                         goto out;
7709                 }
7710
7711                 if (out_buf_len < sizeof(struct validate_negotiate_info_rsp)) {
7712                         ret = -EINVAL;
7713                         goto out;
7714                 }
7715
7716                 ret = fsctl_validate_negotiate_info(conn,
7717                         (struct validate_negotiate_info_req *)&req->Buffer[0],
7718                         (struct validate_negotiate_info_rsp *)&rsp->Buffer[0],
7719                         in_buf_len);
7720                 if (ret < 0)
7721                         goto out;
7722
7723                 nbytes = sizeof(struct validate_negotiate_info_rsp);
7724                 rsp->PersistentFileId = SMB2_NO_FID;
7725                 rsp->VolatileFileId = SMB2_NO_FID;
7726                 break;
7727         case FSCTL_QUERY_NETWORK_INTERFACE_INFO:
7728                 ret = fsctl_query_iface_info_ioctl(conn, rsp, out_buf_len);
7729                 if (ret < 0)
7730                         goto out;
7731                 nbytes = ret;
7732                 break;
7733         case FSCTL_REQUEST_RESUME_KEY:
7734                 if (out_buf_len < sizeof(struct resume_key_ioctl_rsp)) {
7735                         ret = -EINVAL;
7736                         goto out;
7737                 }
7738
7739                 ret = fsctl_request_resume_key(work, req,
7740                                                (struct resume_key_ioctl_rsp *)&rsp->Buffer[0]);
7741                 if (ret < 0)
7742                         goto out;
7743                 rsp->PersistentFileId = req->PersistentFileId;
7744                 rsp->VolatileFileId = req->VolatileFileId;
7745                 nbytes = sizeof(struct resume_key_ioctl_rsp);
7746                 break;
7747         case FSCTL_COPYCHUNK:
7748         case FSCTL_COPYCHUNK_WRITE:
7749                 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
7750                         ksmbd_debug(SMB,
7751                                     "User does not have write permission\n");
7752                         ret = -EACCES;
7753                         goto out;
7754                 }
7755
7756                 if (in_buf_len < sizeof(struct copychunk_ioctl_req)) {
7757                         ret = -EINVAL;
7758                         goto out;
7759                 }
7760
7761                 if (out_buf_len < sizeof(struct copychunk_ioctl_rsp)) {
7762                         ret = -EINVAL;
7763                         goto out;
7764                 }
7765
7766                 nbytes = sizeof(struct copychunk_ioctl_rsp);
7767                 rsp->VolatileFileId = req->VolatileFileId;
7768                 rsp->PersistentFileId = req->PersistentFileId;
7769                 fsctl_copychunk(work,
7770                                 (struct copychunk_ioctl_req *)&req->Buffer[0],
7771                                 le32_to_cpu(req->CtlCode),
7772                                 le32_to_cpu(req->InputCount),
7773                                 req->VolatileFileId,
7774                                 req->PersistentFileId,
7775                                 rsp);
7776                 break;
7777         case FSCTL_SET_SPARSE:
7778                 if (in_buf_len < sizeof(struct file_sparse)) {
7779                         ret = -EINVAL;
7780                         goto out;
7781                 }
7782
7783                 ret = fsctl_set_sparse(work, id,
7784                                        (struct file_sparse *)&req->Buffer[0]);
7785                 if (ret < 0)
7786                         goto out;
7787                 break;
7788         case FSCTL_SET_ZERO_DATA:
7789         {
7790                 struct file_zero_data_information *zero_data;
7791                 struct ksmbd_file *fp;
7792                 loff_t off, len, bfz;
7793
7794                 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
7795                         ksmbd_debug(SMB,
7796                                     "User does not have write permission\n");
7797                         ret = -EACCES;
7798                         goto out;
7799                 }
7800
7801                 if (in_buf_len < sizeof(struct file_zero_data_information)) {
7802                         ret = -EINVAL;
7803                         goto out;
7804                 }
7805
7806                 zero_data =
7807                         (struct file_zero_data_information *)&req->Buffer[0];
7808
7809                 off = le64_to_cpu(zero_data->FileOffset);
7810                 bfz = le64_to_cpu(zero_data->BeyondFinalZero);
7811                 if (off < 0 || bfz < 0 || off > bfz) {
7812                         ret = -EINVAL;
7813                         goto out;
7814                 }
7815
7816                 len = bfz - off;
7817                 if (len) {
7818                         fp = ksmbd_lookup_fd_fast(work, id);
7819                         if (!fp) {
7820                                 ret = -ENOENT;
7821                                 goto out;
7822                         }
7823
7824                         ret = ksmbd_vfs_zero_data(work, fp, off, len);
7825                         ksmbd_fd_put(work, fp);
7826                         if (ret < 0)
7827                                 goto out;
7828                 }
7829                 break;
7830         }
7831         case FSCTL_QUERY_ALLOCATED_RANGES:
7832                 if (in_buf_len < sizeof(struct file_allocated_range_buffer)) {
7833                         ret = -EINVAL;
7834                         goto out;
7835                 }
7836
7837                 ret = fsctl_query_allocated_ranges(work, id,
7838                         (struct file_allocated_range_buffer *)&req->Buffer[0],
7839                         (struct file_allocated_range_buffer *)&rsp->Buffer[0],
7840                         out_buf_len /
7841                         sizeof(struct file_allocated_range_buffer), &nbytes);
7842                 if (ret == -E2BIG) {
7843                         rsp->hdr.Status = STATUS_BUFFER_OVERFLOW;
7844                 } else if (ret < 0) {
7845                         nbytes = 0;
7846                         goto out;
7847                 }
7848
7849                 nbytes *= sizeof(struct file_allocated_range_buffer);
7850                 break;
7851         case FSCTL_GET_REPARSE_POINT:
7852         {
7853                 struct reparse_data_buffer *reparse_ptr;
7854                 struct ksmbd_file *fp;
7855
7856                 reparse_ptr = (struct reparse_data_buffer *)&rsp->Buffer[0];
7857                 fp = ksmbd_lookup_fd_fast(work, id);
7858                 if (!fp) {
7859                         pr_err("not found fp!!\n");
7860                         ret = -ENOENT;
7861                         goto out;
7862                 }
7863
7864                 reparse_ptr->ReparseTag =
7865                         smb2_get_reparse_tag_special_file(file_inode(fp->filp)->i_mode);
7866                 reparse_ptr->ReparseDataLength = 0;
7867                 ksmbd_fd_put(work, fp);
7868                 nbytes = sizeof(struct reparse_data_buffer);
7869                 break;
7870         }
7871         case FSCTL_DUPLICATE_EXTENTS_TO_FILE:
7872         {
7873                 struct ksmbd_file *fp_in, *fp_out = NULL;
7874                 struct duplicate_extents_to_file *dup_ext;
7875                 loff_t src_off, dst_off, length, cloned;
7876
7877                 if (in_buf_len < sizeof(struct duplicate_extents_to_file)) {
7878                         ret = -EINVAL;
7879                         goto out;
7880                 }
7881
7882                 dup_ext = (struct duplicate_extents_to_file *)&req->Buffer[0];
7883
7884                 fp_in = ksmbd_lookup_fd_slow(work, dup_ext->VolatileFileHandle,
7885                                              dup_ext->PersistentFileHandle);
7886                 if (!fp_in) {
7887                         pr_err("not found file handle in duplicate extent to file\n");
7888                         ret = -ENOENT;
7889                         goto out;
7890                 }
7891
7892                 fp_out = ksmbd_lookup_fd_fast(work, id);
7893                 if (!fp_out) {
7894                         pr_err("not found fp\n");
7895                         ret = -ENOENT;
7896                         goto dup_ext_out;
7897                 }
7898
7899                 src_off = le64_to_cpu(dup_ext->SourceFileOffset);
7900                 dst_off = le64_to_cpu(dup_ext->TargetFileOffset);
7901                 length = le64_to_cpu(dup_ext->ByteCount);
7902                 /*
7903                  * XXX: It is not clear if FSCTL_DUPLICATE_EXTENTS_TO_FILE
7904                  * should fall back to vfs_copy_file_range().  This could be
7905                  * beneficial when re-exporting nfs/smb mount, but note that
7906                  * this can result in partial copy that returns an error status.
7907                  * If/when FSCTL_DUPLICATE_EXTENTS_TO_FILE_EX is implemented,
7908                  * fall back to vfs_copy_file_range(), should be avoided when
7909                  * the flag DUPLICATE_EXTENTS_DATA_EX_SOURCE_ATOMIC is set.
7910                  */
7911                 cloned = vfs_clone_file_range(fp_in->filp, src_off,
7912                                               fp_out->filp, dst_off, length, 0);
7913                 if (cloned == -EXDEV || cloned == -EOPNOTSUPP) {
7914                         ret = -EOPNOTSUPP;
7915                         goto dup_ext_out;
7916                 } else if (cloned != length) {
7917                         cloned = vfs_copy_file_range(fp_in->filp, src_off,
7918                                                      fp_out->filp, dst_off,
7919                                                      length, 0);
7920                         if (cloned != length) {
7921                                 if (cloned < 0)
7922                                         ret = cloned;
7923                                 else
7924                                         ret = -EINVAL;
7925                         }
7926                 }
7927
7928 dup_ext_out:
7929                 ksmbd_fd_put(work, fp_in);
7930                 ksmbd_fd_put(work, fp_out);
7931                 if (ret < 0)
7932                         goto out;
7933                 break;
7934         }
7935         default:
7936                 ksmbd_debug(SMB, "not implemented yet ioctl command 0x%x\n",
7937                             cnt_code);
7938                 ret = -EOPNOTSUPP;
7939                 goto out;
7940         }
7941
7942         rsp->CtlCode = cpu_to_le32(cnt_code);
7943         rsp->InputCount = cpu_to_le32(0);
7944         rsp->InputOffset = cpu_to_le32(112);
7945         rsp->OutputOffset = cpu_to_le32(112);
7946         rsp->OutputCount = cpu_to_le32(nbytes);
7947         rsp->StructureSize = cpu_to_le16(49);
7948         rsp->Reserved = cpu_to_le16(0);
7949         rsp->Flags = cpu_to_le32(0);
7950         rsp->Reserved2 = cpu_to_le32(0);
7951         ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_ioctl_rsp) + nbytes);
7952         if (!ret)
7953                 return ret;
7954
7955 out:
7956         if (ret == -EACCES)
7957                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
7958         else if (ret == -ENOENT)
7959                 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
7960         else if (ret == -EOPNOTSUPP)
7961                 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
7962         else if (ret == -ENOSPC)
7963                 rsp->hdr.Status = STATUS_BUFFER_TOO_SMALL;
7964         else if (ret < 0 || rsp->hdr.Status == 0)
7965                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7966         smb2_set_err_rsp(work);
7967         return 0;
7968 }
7969
7970 /**
7971  * smb20_oplock_break_ack() - handler for smb2.0 oplock break command
7972  * @work:       smb work containing oplock break command buffer
7973  *
7974  * Return:      0
7975  */
7976 static void smb20_oplock_break_ack(struct ksmbd_work *work)
7977 {
7978         struct smb2_oplock_break *req;
7979         struct smb2_oplock_break *rsp;
7980         struct ksmbd_file *fp;
7981         struct oplock_info *opinfo = NULL;
7982         __le32 err = 0;
7983         int ret = 0;
7984         u64 volatile_id, persistent_id;
7985         char req_oplevel = 0, rsp_oplevel = 0;
7986         unsigned int oplock_change_type;
7987
7988         WORK_BUFFERS(work, req, rsp);
7989
7990         volatile_id = req->VolatileFid;
7991         persistent_id = req->PersistentFid;
7992         req_oplevel = req->OplockLevel;
7993         ksmbd_debug(OPLOCK, "v_id %llu, p_id %llu request oplock level %d\n",
7994                     volatile_id, persistent_id, req_oplevel);
7995
7996         fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id);
7997         if (!fp) {
7998                 rsp->hdr.Status = STATUS_FILE_CLOSED;
7999                 smb2_set_err_rsp(work);
8000                 return;
8001         }
8002
8003         opinfo = opinfo_get(fp);
8004         if (!opinfo) {
8005                 pr_err("unexpected null oplock_info\n");
8006                 rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL;
8007                 smb2_set_err_rsp(work);
8008                 ksmbd_fd_put(work, fp);
8009                 return;
8010         }
8011
8012         if (opinfo->level == SMB2_OPLOCK_LEVEL_NONE) {
8013                 rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL;
8014                 goto err_out;
8015         }
8016
8017         if (opinfo->op_state == OPLOCK_STATE_NONE) {
8018                 ksmbd_debug(SMB, "unexpected oplock state 0x%x\n", opinfo->op_state);
8019                 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8020                 goto err_out;
8021         }
8022
8023         if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
8024              opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
8025             (req_oplevel != SMB2_OPLOCK_LEVEL_II &&
8026              req_oplevel != SMB2_OPLOCK_LEVEL_NONE)) {
8027                 err = STATUS_INVALID_OPLOCK_PROTOCOL;
8028                 oplock_change_type = OPLOCK_WRITE_TO_NONE;
8029         } else if (opinfo->level == SMB2_OPLOCK_LEVEL_II &&
8030                    req_oplevel != SMB2_OPLOCK_LEVEL_NONE) {
8031                 err = STATUS_INVALID_OPLOCK_PROTOCOL;
8032                 oplock_change_type = OPLOCK_READ_TO_NONE;
8033         } else if (req_oplevel == SMB2_OPLOCK_LEVEL_II ||
8034                    req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
8035                 err = STATUS_INVALID_DEVICE_STATE;
8036                 if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
8037                      opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
8038                     req_oplevel == SMB2_OPLOCK_LEVEL_II) {
8039                         oplock_change_type = OPLOCK_WRITE_TO_READ;
8040                 } else if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
8041                             opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
8042                            req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
8043                         oplock_change_type = OPLOCK_WRITE_TO_NONE;
8044                 } else if (opinfo->level == SMB2_OPLOCK_LEVEL_II &&
8045                            req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
8046                         oplock_change_type = OPLOCK_READ_TO_NONE;
8047                 } else {
8048                         oplock_change_type = 0;
8049                 }
8050         } else {
8051                 oplock_change_type = 0;
8052         }
8053
8054         switch (oplock_change_type) {
8055         case OPLOCK_WRITE_TO_READ:
8056                 ret = opinfo_write_to_read(opinfo);
8057                 rsp_oplevel = SMB2_OPLOCK_LEVEL_II;
8058                 break;
8059         case OPLOCK_WRITE_TO_NONE:
8060                 ret = opinfo_write_to_none(opinfo);
8061                 rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE;
8062                 break;
8063         case OPLOCK_READ_TO_NONE:
8064                 ret = opinfo_read_to_none(opinfo);
8065                 rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE;
8066                 break;
8067         default:
8068                 pr_err("unknown oplock change 0x%x -> 0x%x\n",
8069                        opinfo->level, rsp_oplevel);
8070         }
8071
8072         if (ret < 0) {
8073                 rsp->hdr.Status = err;
8074                 goto err_out;
8075         }
8076
8077         opinfo->op_state = OPLOCK_STATE_NONE;
8078         wake_up_interruptible_all(&opinfo->oplock_q);
8079         opinfo_put(opinfo);
8080         ksmbd_fd_put(work, fp);
8081
8082         rsp->StructureSize = cpu_to_le16(24);
8083         rsp->OplockLevel = rsp_oplevel;
8084         rsp->Reserved = 0;
8085         rsp->Reserved2 = 0;
8086         rsp->VolatileFid = volatile_id;
8087         rsp->PersistentFid = persistent_id;
8088         ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_oplock_break));
8089         if (!ret)
8090                 return;
8091
8092 err_out:
8093         opinfo->op_state = OPLOCK_STATE_NONE;
8094         wake_up_interruptible_all(&opinfo->oplock_q);
8095
8096         opinfo_put(opinfo);
8097         ksmbd_fd_put(work, fp);
8098         smb2_set_err_rsp(work);
8099 }
8100
8101 static int check_lease_state(struct lease *lease, __le32 req_state)
8102 {
8103         if ((lease->new_state ==
8104              (SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE)) &&
8105             !(req_state & SMB2_LEASE_WRITE_CACHING_LE)) {
8106                 lease->new_state = req_state;
8107                 return 0;
8108         }
8109
8110         if (lease->new_state == req_state)
8111                 return 0;
8112
8113         return 1;
8114 }
8115
8116 /**
8117  * smb21_lease_break_ack() - handler for smb2.1 lease break command
8118  * @work:       smb work containing lease break command buffer
8119  *
8120  * Return:      0
8121  */
8122 static void smb21_lease_break_ack(struct ksmbd_work *work)
8123 {
8124         struct ksmbd_conn *conn = work->conn;
8125         struct smb2_lease_ack *req;
8126         struct smb2_lease_ack *rsp;
8127         struct oplock_info *opinfo;
8128         __le32 err = 0;
8129         int ret = 0;
8130         unsigned int lease_change_type;
8131         __le32 lease_state;
8132         struct lease *lease;
8133
8134         WORK_BUFFERS(work, req, rsp);
8135
8136         ksmbd_debug(OPLOCK, "smb21 lease break, lease state(0x%x)\n",
8137                     le32_to_cpu(req->LeaseState));
8138         opinfo = lookup_lease_in_table(conn, req->LeaseKey);
8139         if (!opinfo) {
8140                 ksmbd_debug(OPLOCK, "file not opened\n");
8141                 smb2_set_err_rsp(work);
8142                 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8143                 return;
8144         }
8145         lease = opinfo->o_lease;
8146
8147         if (opinfo->op_state == OPLOCK_STATE_NONE) {
8148                 pr_err("unexpected lease break state 0x%x\n",
8149                        opinfo->op_state);
8150                 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8151                 goto err_out;
8152         }
8153
8154         if (check_lease_state(lease, req->LeaseState)) {
8155                 rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED;
8156                 ksmbd_debug(OPLOCK,
8157                             "req lease state: 0x%x, expected state: 0x%x\n",
8158                             req->LeaseState, lease->new_state);
8159                 goto err_out;
8160         }
8161
8162         if (!atomic_read(&opinfo->breaking_cnt)) {
8163                 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8164                 goto err_out;
8165         }
8166
8167         /* check for bad lease state */
8168         if (req->LeaseState &
8169             (~(SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE))) {
8170                 err = STATUS_INVALID_OPLOCK_PROTOCOL;
8171                 if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
8172                         lease_change_type = OPLOCK_WRITE_TO_NONE;
8173                 else
8174                         lease_change_type = OPLOCK_READ_TO_NONE;
8175                 ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n",
8176                             le32_to_cpu(lease->state),
8177                             le32_to_cpu(req->LeaseState));
8178         } else if (lease->state == SMB2_LEASE_READ_CACHING_LE &&
8179                    req->LeaseState != SMB2_LEASE_NONE_LE) {
8180                 err = STATUS_INVALID_OPLOCK_PROTOCOL;
8181                 lease_change_type = OPLOCK_READ_TO_NONE;
8182                 ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n",
8183                             le32_to_cpu(lease->state),
8184                             le32_to_cpu(req->LeaseState));
8185         } else {
8186                 /* valid lease state changes */
8187                 err = STATUS_INVALID_DEVICE_STATE;
8188                 if (req->LeaseState == SMB2_LEASE_NONE_LE) {
8189                         if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
8190                                 lease_change_type = OPLOCK_WRITE_TO_NONE;
8191                         else
8192                                 lease_change_type = OPLOCK_READ_TO_NONE;
8193                 } else if (req->LeaseState & SMB2_LEASE_READ_CACHING_LE) {
8194                         if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
8195                                 lease_change_type = OPLOCK_WRITE_TO_READ;
8196                         else
8197                                 lease_change_type = OPLOCK_READ_HANDLE_TO_READ;
8198                 } else {
8199                         lease_change_type = 0;
8200                 }
8201         }
8202
8203         switch (lease_change_type) {
8204         case OPLOCK_WRITE_TO_READ:
8205                 ret = opinfo_write_to_read(opinfo);
8206                 break;
8207         case OPLOCK_READ_HANDLE_TO_READ:
8208                 ret = opinfo_read_handle_to_read(opinfo);
8209                 break;
8210         case OPLOCK_WRITE_TO_NONE:
8211                 ret = opinfo_write_to_none(opinfo);
8212                 break;
8213         case OPLOCK_READ_TO_NONE:
8214                 ret = opinfo_read_to_none(opinfo);
8215                 break;
8216         default:
8217                 ksmbd_debug(OPLOCK, "unknown lease change 0x%x -> 0x%x\n",
8218                             le32_to_cpu(lease->state),
8219                             le32_to_cpu(req->LeaseState));
8220         }
8221
8222         if (ret < 0) {
8223                 rsp->hdr.Status = err;
8224                 goto err_out;
8225         }
8226
8227         lease_state = lease->state;
8228         opinfo->op_state = OPLOCK_STATE_NONE;
8229         wake_up_interruptible_all(&opinfo->oplock_q);
8230         atomic_dec(&opinfo->breaking_cnt);
8231         wake_up_interruptible_all(&opinfo->oplock_brk);
8232         opinfo_put(opinfo);
8233
8234         rsp->StructureSize = cpu_to_le16(36);
8235         rsp->Reserved = 0;
8236         rsp->Flags = 0;
8237         memcpy(rsp->LeaseKey, req->LeaseKey, 16);
8238         rsp->LeaseState = lease_state;
8239         rsp->LeaseDuration = 0;
8240         ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_lease_ack));
8241         if (!ret)
8242                 return;
8243
8244 err_out:
8245         wake_up_interruptible_all(&opinfo->oplock_q);
8246         atomic_dec(&opinfo->breaking_cnt);
8247         wake_up_interruptible_all(&opinfo->oplock_brk);
8248
8249         opinfo_put(opinfo);
8250         smb2_set_err_rsp(work);
8251 }
8252
8253 /**
8254  * smb2_oplock_break() - dispatcher for smb2.0 and 2.1 oplock/lease break
8255  * @work:       smb work containing oplock/lease break command buffer
8256  *
8257  * Return:      0
8258  */
8259 int smb2_oplock_break(struct ksmbd_work *work)
8260 {
8261         struct smb2_oplock_break *req;
8262         struct smb2_oplock_break *rsp;
8263
8264         WORK_BUFFERS(work, req, rsp);
8265
8266         switch (le16_to_cpu(req->StructureSize)) {
8267         case OP_BREAK_STRUCT_SIZE_20:
8268                 smb20_oplock_break_ack(work);
8269                 break;
8270         case OP_BREAK_STRUCT_SIZE_21:
8271                 smb21_lease_break_ack(work);
8272                 break;
8273         default:
8274                 ksmbd_debug(OPLOCK, "invalid break cmd %d\n",
8275                             le16_to_cpu(req->StructureSize));
8276                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
8277                 smb2_set_err_rsp(work);
8278         }
8279
8280         return 0;
8281 }
8282
8283 /**
8284  * smb2_notify() - handler for smb2 notify request
8285  * @work:   smb work containing notify command buffer
8286  *
8287  * Return:      0
8288  */
8289 int smb2_notify(struct ksmbd_work *work)
8290 {
8291         struct smb2_change_notify_req *req;
8292         struct smb2_change_notify_rsp *rsp;
8293
8294         WORK_BUFFERS(work, req, rsp);
8295
8296         if (work->next_smb2_rcv_hdr_off && req->hdr.NextCommand) {
8297                 rsp->hdr.Status = STATUS_INTERNAL_ERROR;
8298                 smb2_set_err_rsp(work);
8299                 return 0;
8300         }
8301
8302         smb2_set_err_rsp(work);
8303         rsp->hdr.Status = STATUS_NOT_IMPLEMENTED;
8304         return 0;
8305 }
8306
8307 /**
8308  * smb2_is_sign_req() - handler for checking packet signing status
8309  * @work:       smb work containing notify command buffer
8310  * @command:    SMB2 command id
8311  *
8312  * Return:      true if packed is signed, false otherwise
8313  */
8314 bool smb2_is_sign_req(struct ksmbd_work *work, unsigned int command)
8315 {
8316         struct smb2_hdr *rcv_hdr2 = smb2_get_msg(work->request_buf);
8317
8318         if ((rcv_hdr2->Flags & SMB2_FLAGS_SIGNED) &&
8319             command != SMB2_NEGOTIATE_HE &&
8320             command != SMB2_SESSION_SETUP_HE &&
8321             command != SMB2_OPLOCK_BREAK_HE)
8322                 return true;
8323
8324         return false;
8325 }
8326
8327 /**
8328  * smb2_check_sign_req() - handler for req packet sign processing
8329  * @work:   smb work containing notify command buffer
8330  *
8331  * Return:      1 on success, 0 otherwise
8332  */
8333 int smb2_check_sign_req(struct ksmbd_work *work)
8334 {
8335         struct smb2_hdr *hdr;
8336         char signature_req[SMB2_SIGNATURE_SIZE];
8337         char signature[SMB2_HMACSHA256_SIZE];
8338         struct kvec iov[1];
8339         size_t len;
8340
8341         hdr = smb2_get_msg(work->request_buf);
8342         if (work->next_smb2_rcv_hdr_off)
8343                 hdr = ksmbd_req_buf_next(work);
8344
8345         if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off)
8346                 len = get_rfc1002_len(work->request_buf);
8347         else if (hdr->NextCommand)
8348                 len = le32_to_cpu(hdr->NextCommand);
8349         else
8350                 len = get_rfc1002_len(work->request_buf) -
8351                         work->next_smb2_rcv_hdr_off;
8352
8353         memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE);
8354         memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8355
8356         iov[0].iov_base = (char *)&hdr->ProtocolId;
8357         iov[0].iov_len = len;
8358
8359         if (ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, 1,
8360                                 signature))
8361                 return 0;
8362
8363         if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) {
8364                 pr_err("bad smb2 signature\n");
8365                 return 0;
8366         }
8367
8368         return 1;
8369 }
8370
8371 /**
8372  * smb2_set_sign_rsp() - handler for rsp packet sign processing
8373  * @work:   smb work containing notify command buffer
8374  *
8375  */
8376 void smb2_set_sign_rsp(struct ksmbd_work *work)
8377 {
8378         struct smb2_hdr *hdr;
8379         char signature[SMB2_HMACSHA256_SIZE];
8380         struct kvec *iov;
8381         int n_vec = 1;
8382
8383         hdr = ksmbd_resp_buf_curr(work);
8384         hdr->Flags |= SMB2_FLAGS_SIGNED;
8385         memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8386
8387         if (hdr->Command == SMB2_READ) {
8388                 iov = &work->iov[work->iov_idx - 1];
8389                 n_vec++;
8390         } else {
8391                 iov = &work->iov[work->iov_idx];
8392         }
8393
8394         if (!ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, n_vec,
8395                                  signature))
8396                 memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE);
8397 }
8398
8399 /**
8400  * smb3_check_sign_req() - handler for req packet sign processing
8401  * @work:   smb work containing notify command buffer
8402  *
8403  * Return:      1 on success, 0 otherwise
8404  */
8405 int smb3_check_sign_req(struct ksmbd_work *work)
8406 {
8407         struct ksmbd_conn *conn = work->conn;
8408         char *signing_key;
8409         struct smb2_hdr *hdr;
8410         struct channel *chann;
8411         char signature_req[SMB2_SIGNATURE_SIZE];
8412         char signature[SMB2_CMACAES_SIZE];
8413         struct kvec iov[1];
8414         size_t len;
8415
8416         hdr = smb2_get_msg(work->request_buf);
8417         if (work->next_smb2_rcv_hdr_off)
8418                 hdr = ksmbd_req_buf_next(work);
8419
8420         if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off)
8421                 len = get_rfc1002_len(work->request_buf);
8422         else if (hdr->NextCommand)
8423                 len = le32_to_cpu(hdr->NextCommand);
8424         else
8425                 len = get_rfc1002_len(work->request_buf) -
8426                         work->next_smb2_rcv_hdr_off;
8427
8428         if (le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) {
8429                 signing_key = work->sess->smb3signingkey;
8430         } else {
8431                 chann = lookup_chann_list(work->sess, conn);
8432                 if (!chann) {
8433                         return 0;
8434                 }
8435                 signing_key = chann->smb3signingkey;
8436         }
8437
8438         if (!signing_key) {
8439                 pr_err("SMB3 signing key is not generated\n");
8440                 return 0;
8441         }
8442
8443         memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE);
8444         memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8445         iov[0].iov_base = (char *)&hdr->ProtocolId;
8446         iov[0].iov_len = len;
8447
8448         if (ksmbd_sign_smb3_pdu(conn, signing_key, iov, 1, signature))
8449                 return 0;
8450
8451         if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) {
8452                 pr_err("bad smb2 signature\n");
8453                 return 0;
8454         }
8455
8456         return 1;
8457 }
8458
8459 /**
8460  * smb3_set_sign_rsp() - handler for rsp packet sign processing
8461  * @work:   smb work containing notify command buffer
8462  *
8463  */
8464 void smb3_set_sign_rsp(struct ksmbd_work *work)
8465 {
8466         struct ksmbd_conn *conn = work->conn;
8467         struct smb2_hdr *hdr;
8468         struct channel *chann;
8469         char signature[SMB2_CMACAES_SIZE];
8470         struct kvec *iov;
8471         int n_vec = 1;
8472         char *signing_key;
8473
8474         hdr = ksmbd_resp_buf_curr(work);
8475
8476         if (conn->binding == false &&
8477             le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) {
8478                 signing_key = work->sess->smb3signingkey;
8479         } else {
8480                 chann = lookup_chann_list(work->sess, work->conn);
8481                 if (!chann) {
8482                         return;
8483                 }
8484                 signing_key = chann->smb3signingkey;
8485         }
8486
8487         if (!signing_key)
8488                 return;
8489
8490         hdr->Flags |= SMB2_FLAGS_SIGNED;
8491         memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8492
8493         if (hdr->Command == SMB2_READ) {
8494                 iov = &work->iov[work->iov_idx - 1];
8495                 n_vec++;
8496         } else {
8497                 iov = &work->iov[work->iov_idx];
8498         }
8499
8500         if (!ksmbd_sign_smb3_pdu(conn, signing_key, iov, n_vec,
8501                                  signature))
8502                 memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE);
8503 }
8504
8505 /**
8506  * smb3_preauth_hash_rsp() - handler for computing preauth hash on response
8507  * @work:   smb work containing response buffer
8508  *
8509  */
8510 void smb3_preauth_hash_rsp(struct ksmbd_work *work)
8511 {
8512         struct ksmbd_conn *conn = work->conn;
8513         struct ksmbd_session *sess = work->sess;
8514         struct smb2_hdr *req, *rsp;
8515
8516         if (conn->dialect != SMB311_PROT_ID)
8517                 return;
8518
8519         WORK_BUFFERS(work, req, rsp);
8520
8521         if (le16_to_cpu(req->Command) == SMB2_NEGOTIATE_HE &&
8522             conn->preauth_info)
8523                 ksmbd_gen_preauth_integrity_hash(conn, work->response_buf,
8524                                                  conn->preauth_info->Preauth_HashValue);
8525
8526         if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE && sess) {
8527                 __u8 *hash_value;
8528
8529                 if (conn->binding) {
8530                         struct preauth_session *preauth_sess;
8531
8532                         preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id);
8533                         if (!preauth_sess)
8534                                 return;
8535                         hash_value = preauth_sess->Preauth_HashValue;
8536                 } else {
8537                         hash_value = sess->Preauth_HashValue;
8538                         if (!hash_value)
8539                                 return;
8540                 }
8541                 ksmbd_gen_preauth_integrity_hash(conn, work->response_buf,
8542                                                  hash_value);
8543         }
8544 }
8545
8546 static void fill_transform_hdr(void *tr_buf, char *old_buf, __le16 cipher_type)
8547 {
8548         struct smb2_transform_hdr *tr_hdr = tr_buf + 4;
8549         struct smb2_hdr *hdr = smb2_get_msg(old_buf);
8550         unsigned int orig_len = get_rfc1002_len(old_buf);
8551
8552         /* tr_buf must be cleared by the caller */
8553         tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
8554         tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
8555         tr_hdr->Flags = cpu_to_le16(TRANSFORM_FLAG_ENCRYPTED);
8556         if (cipher_type == SMB2_ENCRYPTION_AES128_GCM ||
8557             cipher_type == SMB2_ENCRYPTION_AES256_GCM)
8558                 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
8559         else
8560                 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
8561         memcpy(&tr_hdr->SessionId, &hdr->SessionId, 8);
8562         inc_rfc1001_len(tr_buf, sizeof(struct smb2_transform_hdr));
8563         inc_rfc1001_len(tr_buf, orig_len);
8564 }
8565
8566 int smb3_encrypt_resp(struct ksmbd_work *work)
8567 {
8568         struct kvec *iov = work->iov;
8569         int rc = -ENOMEM;
8570         void *tr_buf;
8571
8572         tr_buf = kzalloc(sizeof(struct smb2_transform_hdr) + 4, GFP_KERNEL);
8573         if (!tr_buf)
8574                 return rc;
8575
8576         /* fill transform header */
8577         fill_transform_hdr(tr_buf, work->response_buf, work->conn->cipher_type);
8578
8579         iov[0].iov_base = tr_buf;
8580         iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4;
8581         work->tr_buf = tr_buf;
8582
8583         return ksmbd_crypt_message(work, iov, work->iov_idx + 1, 1);
8584 }
8585
8586 bool smb3_is_transform_hdr(void *buf)
8587 {
8588         struct smb2_transform_hdr *trhdr = smb2_get_msg(buf);
8589
8590         return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
8591 }
8592
8593 int smb3_decrypt_req(struct ksmbd_work *work)
8594 {
8595         struct ksmbd_session *sess;
8596         char *buf = work->request_buf;
8597         unsigned int pdu_length = get_rfc1002_len(buf);
8598         struct kvec iov[2];
8599         int buf_data_size = pdu_length - sizeof(struct smb2_transform_hdr);
8600         struct smb2_transform_hdr *tr_hdr = smb2_get_msg(buf);
8601         int rc = 0;
8602
8603         if (pdu_length < sizeof(struct smb2_transform_hdr) ||
8604             buf_data_size < sizeof(struct smb2_hdr)) {
8605                 pr_err("Transform message is too small (%u)\n",
8606                        pdu_length);
8607                 return -ECONNABORTED;
8608         }
8609
8610         if (buf_data_size < le32_to_cpu(tr_hdr->OriginalMessageSize)) {
8611                 pr_err("Transform message is broken\n");
8612                 return -ECONNABORTED;
8613         }
8614
8615         sess = ksmbd_session_lookup_all(work->conn, le64_to_cpu(tr_hdr->SessionId));
8616         if (!sess) {
8617                 pr_err("invalid session id(%llx) in transform header\n",
8618                        le64_to_cpu(tr_hdr->SessionId));
8619                 return -ECONNABORTED;
8620         }
8621
8622         iov[0].iov_base = buf;
8623         iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4;
8624         iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr) + 4;
8625         iov[1].iov_len = buf_data_size;
8626         rc = ksmbd_crypt_message(work, iov, 2, 0);
8627         if (rc)
8628                 return rc;
8629
8630         memmove(buf + 4, iov[1].iov_base, buf_data_size);
8631         *(__be32 *)buf = cpu_to_be32(buf_data_size);
8632
8633         return rc;
8634 }
8635
8636 bool smb3_11_final_sess_setup_resp(struct ksmbd_work *work)
8637 {
8638         struct ksmbd_conn *conn = work->conn;
8639         struct ksmbd_session *sess = work->sess;
8640         struct smb2_hdr *rsp = smb2_get_msg(work->response_buf);
8641
8642         if (conn->dialect < SMB30_PROT_ID)
8643                 return false;
8644
8645         if (work->next_smb2_rcv_hdr_off)
8646                 rsp = ksmbd_resp_buf_next(work);
8647
8648         if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE &&
8649             sess->user && !user_guest(sess->user) &&
8650             rsp->Status == STATUS_SUCCESS)
8651                 return true;
8652         return false;
8653 }