fs/smb/client/smb2ops.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  *  SMB2 version specific operations
   4  *
   5  *  Copyright (c) 2012, Jeff Layton <jlayton@redhat.com>
   6  */
   7
   8 #include <linux/pagemap.h>
   9 #include <linux/vfs.h>
  10 #include <linux/falloc.h>
  11 #include <linux/scatterlist.h>
  12 #include <linux/uuid.h>
  13 #include <linux/sort.h>
  14 #include <crypto/aead.h>
  15 #include <linux/fiemap.h>
  16 #include <uapi/linux/magic.h>
  17 #include "cifsfs.h"
  18 #include "cifsglob.h"
  19 #include "smb2pdu.h"
  20 #include "smb2proto.h"
  21 #include "cifsproto.h"
  22 #include "cifs_debug.h"
  23 #include "cifs_unicode.h"
  24 #include "smb2status.h"
  25 #include "smb2glob.h"
  26 #include "cifs_ioctl.h"
  27 #include "smbdirect.h"
  28 #include "fscache.h"
  29 #include "fs_context.h"
  30 #include "cached_dir.h"
  31
  32 /* Change credits for different ops and return the total number of credits */
  33 static int
  34 change_conf(struct TCP_Server_Info *server)
  35 {
  36         server->credits += server->echo_credits + server->oplock_credits;
  37         if (server->credits > server->max_credits)
  38                 server->credits = server->max_credits;
  39         server->oplock_credits = server->echo_credits = 0;
  40         switch (server->credits) {
  41         case 0:
  42                 return 0;
  43         case 1:
  44                 server->echoes = false;
  45                 server->oplocks = false;
  46                 break;
  47         case 2:
  48                 server->echoes = true;
  49                 server->oplocks = false;
  50                 server->echo_credits = 1;
  51                 break;
  52         default:
  53                 server->echoes = true;
  54                 if (enable_oplocks) {
  55                         server->oplocks = true;
  56                         server->oplock_credits = 1;
  57                 } else
  58                         server->oplocks = false;
  59
  60                 server->echo_credits = 1;
  61         }
  62         server->credits -= server->echo_credits + server->oplock_credits;
  63         return server->credits + server->echo_credits + server->oplock_credits;
  64 }
  65
  66 static void
  67 smb2_add_credits(struct TCP_Server_Info *server,
  68                  const struct cifs_credits *credits, const int optype)
  69 {
  70         int *val, rc = -1;
  71         int scredits, in_flight;
  72         unsigned int add = credits->value;
  73         unsigned int instance = credits->instance;
  74         bool reconnect_detected = false;
  75         bool reconnect_with_invalid_credits = false;
  76
  77         spin_lock(&server->req_lock);
  78         val = server->ops->get_credits_field(server, optype);
  79
  80         /* eg found case where write overlapping reconnect messed up credits */
  81         if (((optype & CIFS_OP_MASK) == CIFS_NEG_OP) && (*val != 0))
  82                 reconnect_with_invalid_credits = true;
  83
  84         if ((instance == 0) || (instance == server->reconnect_instance))
  85                 *val += add;
  86         else
  87                 reconnect_detected = true;
  88
  89         if (*val > 65000) {
  90                 *val = 65000; /* Don't get near 64K credits, avoid srv bugs */
  91                 pr_warn_once("server overflowed SMB3 credits\n");
  92                 trace_smb3_overflow_credits(server->CurrentMid,
  93                                             server->conn_id, server->hostname, *val,
  94                                             add, server->in_flight);
  95         }
  96         WARN_ON_ONCE(server->in_flight == 0);
  97         server->in_flight--;
  98         if (server->in_flight == 0 &&
  99            ((optype & CIFS_OP_MASK) != CIFS_NEG_OP) &&
 100            ((optype & CIFS_OP_MASK) != CIFS_SESS_OP))
 101                 rc = change_conf(server);
 102         /*
 103          * Sometimes server returns 0 credits on oplock break ack - we need to
 104          * rebalance credits in this case.
 105          */
 106         else if (server->in_flight > 0 && server->oplock_credits == 0 &&
 107                  server->oplocks) {
 108                 if (server->credits > 1) {
 109                         server->credits--;
 110                         server->oplock_credits++;
 111                 }
 112         } else if ((server->in_flight > 0) && (server->oplock_credits > 3) &&
 113                    ((optype & CIFS_OP_MASK) == CIFS_OBREAK_OP))
 114                 /* if now have too many oplock credits, rebalance so don't starve normal ops */
 115                 change_conf(server);
 116
 117         scredits = *val;
 118         in_flight = server->in_flight;
 119         spin_unlock(&server->req_lock);
 120         wake_up(&server->request_q);
 121
 122         if (reconnect_detected) {
 123                 trace_smb3_reconnect_detected(server->CurrentMid,
 124                         server->conn_id, server->hostname, scredits, add, in_flight);
 125
 126                 cifs_dbg(FYI, "trying to put %d credits from the old server instance %d\n",
 127                          add, instance);
 128         }
 129
 130         if (reconnect_with_invalid_credits) {
 131                 trace_smb3_reconnect_with_invalid_credits(server->CurrentMid,
 132                         server->conn_id, server->hostname, scredits, add, in_flight);
 133                 cifs_dbg(FYI, "Negotiate operation when server credits is non-zero. Optype: %d, server credits: %d, credits added: %d\n",
 134                          optype, scredits, add);
 135         }
 136
 137         spin_lock(&server->srv_lock);
 138         if (server->tcpStatus == CifsNeedReconnect
 139             || server->tcpStatus == CifsExiting) {
 140                 spin_unlock(&server->srv_lock);
 141                 return;
 142         }
 143         spin_unlock(&server->srv_lock);
 144
 145         switch (rc) {
 146         case -1:
 147                 /* change_conf hasn't been executed */
 148                 break;
 149         case 0:
 150                 cifs_server_dbg(VFS, "Possible client or server bug - zero credits\n");
 151                 break;
 152         case 1:
 153                 cifs_server_dbg(VFS, "disabling echoes and oplocks\n");
 154                 break;
 155         case 2:
 156                 cifs_dbg(FYI, "disabling oplocks\n");
 157                 break;
 158         default:
 159                 /* change_conf rebalanced credits for different types */
 160                 break;
 161         }
 162
 163         trace_smb3_add_credits(server->CurrentMid,
 164                         server->conn_id, server->hostname, scredits, add, in_flight);
 165         cifs_dbg(FYI, "%s: added %u credits total=%d\n", __func__, add, scredits);
 166 }
 167
 168 static void
 169 smb2_set_credits(struct TCP_Server_Info *server, const int val)
 170 {
 171         int scredits, in_flight;
 172
 173         spin_lock(&server->req_lock);
 174         server->credits = val;
 175         if (val == 1) {
 176                 server->reconnect_instance++;
 177                 /*
 178                  * ChannelSequence updated for all channels in primary channel so that consistent
 179                  * across SMB3 requests sent on any channel. See MS-SMB2 3.2.4.1 and 3.2.7.1
 180                  */
 181                 if (SERVER_IS_CHAN(server))
 182                         server->primary_server->channel_sequence_num++;
 183                 else
 184                         server->channel_sequence_num++;
 185         }
 186         scredits = server->credits;
 187         in_flight = server->in_flight;
 188         spin_unlock(&server->req_lock);
 189
 190         trace_smb3_set_credits(server->CurrentMid,
 191                         server->conn_id, server->hostname, scredits, val, in_flight);
 192         cifs_dbg(FYI, "%s: set %u credits\n", __func__, val);
 193
 194         /* don't log while holding the lock */
 195         if (val == 1)
 196                 cifs_dbg(FYI, "set credits to 1 due to smb2 reconnect\n");
 197 }
 198
 199 static int *
 200 smb2_get_credits_field(struct TCP_Server_Info *server, const int optype)
 201 {
 202         switch (optype) {
 203         case CIFS_ECHO_OP:
 204                 return &server->echo_credits;
 205         case CIFS_OBREAK_OP:
 206                 return &server->oplock_credits;
 207         default:
 208                 return &server->credits;
 209         }
 210 }
 211
 212 static unsigned int
 213 smb2_get_credits(struct mid_q_entry *mid)
 214 {
 215         return mid->credits_received;
 216 }
 217
 218 static int
 219 smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size,
 220                       unsigned int *num, struct cifs_credits *credits)
 221 {
 222         int rc = 0;
 223         unsigned int scredits, in_flight;
 224
 225         spin_lock(&server->req_lock);
 226         while (1) {
 227                 spin_unlock(&server->req_lock);
 228
 229                 spin_lock(&server->srv_lock);
 230                 if (server->tcpStatus == CifsExiting) {
 231                         spin_unlock(&server->srv_lock);
 232                         return -ENOENT;
 233                 }
 234                 spin_unlock(&server->srv_lock);
 235
 236                 spin_lock(&server->req_lock);
 237                 if (server->credits <= 0) {
 238                         spin_unlock(&server->req_lock);
 239                         cifs_num_waiters_inc(server);
 240                         rc = wait_event_killable(server->request_q,
 241                                 has_credits(server, &server->credits, 1));
 242                         cifs_num_waiters_dec(server);
 243                         if (rc)
 244                                 return rc;
 245                         spin_lock(&server->req_lock);
 246                 } else {
 247                         scredits = server->credits;
 248                         /* can deadlock with reopen */
 249                         if (scredits <= 8) {
 250                                 *num = SMB2_MAX_BUFFER_SIZE;
 251                                 credits->value = 0;
 252                                 credits->instance = 0;
 253                                 break;
 254                         }
 255
 256                         /* leave some credits for reopen and other ops */
 257                         scredits -= 8;
 258                         *num = min_t(unsigned int, size,
 259                                      scredits * SMB2_MAX_BUFFER_SIZE);
 260
 261                         credits->value =
 262                                 DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE);
 263                         credits->instance = server->reconnect_instance;
 264                         server->credits -= credits->value;
 265                         server->in_flight++;
 266                         if (server->in_flight > server->max_in_flight)
 267                                 server->max_in_flight = server->in_flight;
 268                         break;
 269                 }
 270         }
 271         scredits = server->credits;
 272         in_flight = server->in_flight;
 273         spin_unlock(&server->req_lock);
 274
 275         trace_smb3_wait_credits(server->CurrentMid,
 276                         server->conn_id, server->hostname, scredits, -(credits->value), in_flight);
 277         cifs_dbg(FYI, "%s: removed %u credits total=%d\n",
 278                         __func__, credits->value, scredits);
 279
 280         return rc;
 281 }
 282
 283 static int
 284 smb2_adjust_credits(struct TCP_Server_Info *server,
 285                     struct cifs_credits *credits,
 286                     const unsigned int payload_size)
 287 {
 288         int new_val = DIV_ROUND_UP(payload_size, SMB2_MAX_BUFFER_SIZE);
 289         int scredits, in_flight;
 290
 291         if (!credits->value || credits->value == new_val)
 292                 return 0;
 293
 294         if (credits->value < new_val) {
 295                 trace_smb3_too_many_credits(server->CurrentMid,
 296                                 server->conn_id, server->hostname, 0, credits->value - new_val, 0);
 297                 cifs_server_dbg(VFS, "request has less credits (%d) than required (%d)",
 298                                 credits->value, new_val);
 299
 300                 return -EOPNOTSUPP;
 301         }
 302
 303         spin_lock(&server->req_lock);
 304
 305         if (server->reconnect_instance != credits->instance) {
 306                 scredits = server->credits;
 307                 in_flight = server->in_flight;
 308                 spin_unlock(&server->req_lock);
 309
 310                 trace_smb3_reconnect_detected(server->CurrentMid,
 311                         server->conn_id, server->hostname, scredits,
 312                         credits->value - new_val, in_flight);
 313                 cifs_server_dbg(VFS, "trying to return %d credits to old session\n",
 314                          credits->value - new_val);
 315                 return -EAGAIN;
 316         }
 317
 318         server->credits += credits->value - new_val;
 319         scredits = server->credits;
 320         in_flight = server->in_flight;
 321         spin_unlock(&server->req_lock);
 322         wake_up(&server->request_q);
 323
 324         trace_smb3_adj_credits(server->CurrentMid,
 325                         server->conn_id, server->hostname, scredits,
 326                         credits->value - new_val, in_flight);
 327         cifs_dbg(FYI, "%s: adjust added %u credits total=%d\n",
 328                         __func__, credits->value - new_val, scredits);
 329
 330         credits->value = new_val;
 331
 332         return 0;
 333 }
 334
 335 static __u64
 336 smb2_get_next_mid(struct TCP_Server_Info *server)
 337 {
 338         __u64 mid;
 339         /* for SMB2 we need the current value */
 340         spin_lock(&server->mid_lock);
 341         mid = server->CurrentMid++;
 342         spin_unlock(&server->mid_lock);
 343         return mid;
 344 }
 345
 346 static void
 347 smb2_revert_current_mid(struct TCP_Server_Info *server, const unsigned int val)
 348 {
 349         spin_lock(&server->mid_lock);
 350         if (server->CurrentMid >= val)
 351                 server->CurrentMid -= val;
 352         spin_unlock(&server->mid_lock);
 353 }
 354
 355 static struct mid_q_entry *
 356 __smb2_find_mid(struct TCP_Server_Info *server, char *buf, bool dequeue)
 357 {
 358         struct mid_q_entry *mid;
 359         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
 360         __u64 wire_mid = le64_to_cpu(shdr->MessageId);
 361
 362         if (shdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {
 363                 cifs_server_dbg(VFS, "Encrypted frame parsing not supported yet\n");
 364                 return NULL;
 365         }
 366
 367         spin_lock(&server->mid_lock);
 368         list_for_each_entry(mid, &server->pending_mid_q, qhead) {
 369                 if ((mid->mid == wire_mid) &&
 370                     (mid->mid_state == MID_REQUEST_SUBMITTED) &&
 371                     (mid->command == shdr->Command)) {
 372                         kref_get(&mid->refcount);
 373                         if (dequeue) {
 374                                 list_del_init(&mid->qhead);
 375                                 mid->mid_flags |= MID_DELETED;
 376                         }
 377                         spin_unlock(&server->mid_lock);
 378                         return mid;
 379                 }
 380         }
 381         spin_unlock(&server->mid_lock);
 382         return NULL;
 383 }
 384
 385 static struct mid_q_entry *
 386 smb2_find_mid(struct TCP_Server_Info *server, char *buf)
 387 {
 388         return __smb2_find_mid(server, buf, false);
 389 }
 390
 391 static struct mid_q_entry *
 392 smb2_find_dequeue_mid(struct TCP_Server_Info *server, char *buf)
 393 {
 394         return __smb2_find_mid(server, buf, true);
 395 }
 396
 397 static void
 398 smb2_dump_detail(void *buf, struct TCP_Server_Info *server)
 399 {
 400 #ifdef CONFIG_CIFS_DEBUG2
 401         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
 402
 403         cifs_server_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
 404                  shdr->Command, shdr->Status, shdr->Flags, shdr->MessageId,
 405                  shdr->Id.SyncId.ProcessId);
 406         if (!server->ops->check_message(buf, server->total_read, server)) {
 407                 cifs_server_dbg(VFS, "smb buf %p len %u\n", buf,
 408                                 server->ops->calc_smb_size(buf));
 409         }
 410 #endif
 411 }
 412
 413 static bool
 414 smb2_need_neg(struct TCP_Server_Info *server)
 415 {
 416         return server->max_read == 0;
 417 }
 418
 419 static int
 420 smb2_negotiate(const unsigned int xid,
 421                struct cifs_ses *ses,
 422                struct TCP_Server_Info *server)
 423 {
 424         int rc;
 425
 426         spin_lock(&server->mid_lock);
 427         server->CurrentMid = 0;
 428         spin_unlock(&server->mid_lock);
 429         rc = SMB2_negotiate(xid, ses, server);
 430         /* BB we probably don't need to retry with modern servers */
 431         if (rc == -EAGAIN)
 432                 rc = -EHOSTDOWN;
 433         return rc;
 434 }
 435
 436 static unsigned int
 437 smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
 438 {
 439         struct TCP_Server_Info *server = tcon->ses->server;
 440         unsigned int wsize;
 441
 442         /* start with specified wsize, or default */
 443         wsize = ctx->wsize ? ctx->wsize : CIFS_DEFAULT_IOSIZE;
 444         wsize = min_t(unsigned int, wsize, server->max_write);
 445         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 446                 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
 447
 448         return wsize;
 449 }
 450
 451 static unsigned int
 452 smb3_negotiate_wsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
 453 {
 454         struct TCP_Server_Info *server = tcon->ses->server;
 455         unsigned int wsize;
 456
 457         /* start with specified wsize, or default */
 458         wsize = ctx->wsize ? ctx->wsize : SMB3_DEFAULT_IOSIZE;
 459         wsize = min_t(unsigned int, wsize, server->max_write);
 460 #ifdef CONFIG_CIFS_SMB_DIRECT
 461         if (server->rdma) {
 462                 if (server->sign)
 463                         /*
 464                          * Account for SMB2 data transfer packet header and
 465                          * possible encryption header
 466                          */
 467                         wsize = min_t(unsigned int,
 468                                 wsize,
 469                                 server->smbd_conn->max_fragmented_send_size -
 470                                         SMB2_READWRITE_PDU_HEADER_SIZE -
 471                                         sizeof(struct smb2_transform_hdr));
 472                 else
 473                         wsize = min_t(unsigned int,
 474                                 wsize, server->smbd_conn->max_readwrite_size);
 475         }
 476 #endif
 477         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 478                 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
 479
 480         return wsize;
 481 }
 482
 483 static unsigned int
 484 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
 485 {
 486         struct TCP_Server_Info *server = tcon->ses->server;
 487         unsigned int rsize;
 488
 489         /* start with specified rsize, or default */
 490         rsize = ctx->rsize ? ctx->rsize : CIFS_DEFAULT_IOSIZE;
 491         rsize = min_t(unsigned int, rsize, server->max_read);
 492
 493         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 494                 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
 495
 496         return rsize;
 497 }
 498
 499 static unsigned int
 500 smb3_negotiate_rsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
 501 {
 502         struct TCP_Server_Info *server = tcon->ses->server;
 503         unsigned int rsize;
 504
 505         /* start with specified rsize, or default */
 506         rsize = ctx->rsize ? ctx->rsize : SMB3_DEFAULT_IOSIZE;
 507         rsize = min_t(unsigned int, rsize, server->max_read);
 508 #ifdef CONFIG_CIFS_SMB_DIRECT
 509         if (server->rdma) {
 510                 if (server->sign)
 511                         /*
 512                          * Account for SMB2 data transfer packet header and
 513                          * possible encryption header
 514                          */
 515                         rsize = min_t(unsigned int,
 516                                 rsize,
 517                                 server->smbd_conn->max_fragmented_recv_size -
 518                                         SMB2_READWRITE_PDU_HEADER_SIZE -
 519                                         sizeof(struct smb2_transform_hdr));
 520                 else
 521                         rsize = min_t(unsigned int,
 522                                 rsize, server->smbd_conn->max_readwrite_size);
 523         }
 524 #endif
 525
 526         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 527                 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
 528
 529         return rsize;
 530 }
 531
 532 /*
 533  * compare two interfaces a and b
 534  * return 0 if everything matches.
 535  * return 1 if a is rdma capable, or rss capable, or has higher link speed
 536  * return -1 otherwise.
 537  */
 538 static int
 539 iface_cmp(struct cifs_server_iface *a, struct cifs_server_iface *b)
 540 {
 541         int cmp_ret = 0;
 542
 543         WARN_ON(!a || !b);
 544         if (a->rdma_capable == b->rdma_capable) {
 545                 if (a->rss_capable == b->rss_capable) {
 546                         if (a->speed == b->speed) {
 547                                 cmp_ret = cifs_ipaddr_cmp((struct sockaddr *) &a->sockaddr,
 548                                                           (struct sockaddr *) &b->sockaddr);
 549                                 if (!cmp_ret)
 550                                         return 0;
 551                                 else if (cmp_ret > 0)
 552                                         return 1;
 553                                 else
 554                                         return -1;
 555                         } else if (a->speed > b->speed)
 556                                 return 1;
 557                         else
 558                                 return -1;
 559                 } else if (a->rss_capable > b->rss_capable)
 560                         return 1;
 561                 else
 562                         return -1;
 563         } else if (a->rdma_capable > b->rdma_capable)
 564                 return 1;
 565         else
 566                 return -1;
 567 }
 568
 569 static int
 570 parse_server_interfaces(struct network_interface_info_ioctl_rsp *buf,
 571                         size_t buf_len, struct cifs_ses *ses, bool in_mount)
 572 {
 573         struct network_interface_info_ioctl_rsp *p;
 574         struct sockaddr_in *addr4;
 575         struct sockaddr_in6 *addr6;
 576         struct iface_info_ipv4 *p4;
 577         struct iface_info_ipv6 *p6;
 578         struct cifs_server_iface *info = NULL, *iface = NULL, *niface = NULL;
 579         struct cifs_server_iface tmp_iface;
 580         ssize_t bytes_left;
 581         size_t next = 0;
 582         int nb_iface = 0;
 583         int rc = 0, ret = 0;
 584
 585         bytes_left = buf_len;
 586         p = buf;
 587
 588         spin_lock(&ses->iface_lock);
 589         /* do not query too frequently, this time with lock held */
 590         if (ses->iface_last_update &&
 591             time_before(jiffies, ses->iface_last_update +
 592                         (SMB_INTERFACE_POLL_INTERVAL * HZ))) {
 593                 spin_unlock(&ses->iface_lock);
 594                 return 0;
 595         }
 596
 597         /*
 598          * Go through iface_list and do kref_put to remove
 599          * any unused ifaces. ifaces in use will be removed
 600          * when the last user calls a kref_put on it
 601          */
 602         list_for_each_entry_safe(iface, niface, &ses->iface_list,
 603                                  iface_head) {
 604                 iface->is_active = 0;
 605                 kref_put(&iface->refcount, release_iface);
 606                 ses->iface_count--;
 607         }
 608         spin_unlock(&ses->iface_lock);
 609
 610         /*
 611          * Samba server e.g. can return an empty interface list in some cases,
 612          * which would only be a problem if we were requesting multichannel
 613          */
 614         if (bytes_left == 0) {
 615                 /* avoid spamming logs every 10 minutes, so log only in mount */
 616                 if ((ses->chan_max > 1) && in_mount)
 617                         cifs_dbg(VFS,
 618                                  "multichannel not available\n"
 619                                  "Empty network interface list returned by server %s\n",
 620                                  ses->server->hostname);
 621                 rc = -EINVAL;
 622                 goto out;
 623         }
 624
 625         while (bytes_left >= sizeof(*p)) {
 626                 memset(&tmp_iface, 0, sizeof(tmp_iface));
 627                 tmp_iface.speed = le64_to_cpu(p->LinkSpeed);
 628                 tmp_iface.rdma_capable = le32_to_cpu(p->Capability & RDMA_CAPABLE) ? 1 : 0;
 629                 tmp_iface.rss_capable = le32_to_cpu(p->Capability & RSS_CAPABLE) ? 1 : 0;
 630
 631                 switch (p->Family) {
 632                 /*
 633                  * The kernel and wire socket structures have the same
 634                  * layout and use network byte order but make the
 635                  * conversion explicit in case either one changes.
 636                  */
 637                 case INTERNETWORK:
 638                         addr4 = (struct sockaddr_in *)&tmp_iface.sockaddr;
 639                         p4 = (struct iface_info_ipv4 *)p->Buffer;
 640                         addr4->sin_family = AF_INET;
 641                         memcpy(&addr4->sin_addr, &p4->IPv4Address, 4);
 642
 643                         /* [MS-SMB2] 2.2.32.5.1.1 Clients MUST ignore these */
 644                         addr4->sin_port = cpu_to_be16(CIFS_PORT);
 645
 646                         cifs_dbg(FYI, "%s: ipv4 %pI4\n", __func__,
 647                                  &addr4->sin_addr);
 648                         break;
 649                 case INTERNETWORKV6:
 650                         addr6 = (struct sockaddr_in6 *)&tmp_iface.sockaddr;
 651                         p6 = (struct iface_info_ipv6 *)p->Buffer;
 652                         addr6->sin6_family = AF_INET6;
 653                         memcpy(&addr6->sin6_addr, &p6->IPv6Address, 16);
 654
 655                         /* [MS-SMB2] 2.2.32.5.1.2 Clients MUST ignore these */
 656                         addr6->sin6_flowinfo = 0;
 657                         addr6->sin6_scope_id = 0;
 658                         addr6->sin6_port = cpu_to_be16(CIFS_PORT);
 659
 660                         cifs_dbg(FYI, "%s: ipv6 %pI6\n", __func__,
 661                                  &addr6->sin6_addr);
 662                         break;
 663                 default:
 664                         cifs_dbg(VFS,
 665                                  "%s: skipping unsupported socket family\n",
 666                                  __func__);
 667                         goto next_iface;
 668                 }
 669
 670                 /*
 671                  * The iface_list is assumed to be sorted by speed.
 672                  * Check if the new interface exists in that list.
 673                  * NEVER change iface. it could be in use.
 674                  * Add a new one instead
 675                  */
 676                 spin_lock(&ses->iface_lock);
 677                 list_for_each_entry_safe(iface, niface, &ses->iface_list,
 678                                          iface_head) {
 679                         ret = iface_cmp(iface, &tmp_iface);
 680                         if (!ret) {
 681                                 /* just get a ref so that it doesn't get picked/freed */
 682                                 iface->is_active = 1;
 683                                 kref_get(&iface->refcount);
 684                                 ses->iface_count++;
 685                                 spin_unlock(&ses->iface_lock);
 686                                 goto next_iface;
 687                         } else if (ret < 0) {
 688                                 /* all remaining ifaces are slower */
 689                                 kref_get(&iface->refcount);
 690                                 break;
 691                         }
 692                 }
 693                 spin_unlock(&ses->iface_lock);
 694
 695                 /* no match. insert the entry in the list */
 696                 info = kmalloc(sizeof(struct cifs_server_iface),
 697                                GFP_KERNEL);
 698                 if (!info) {
 699                         rc = -ENOMEM;
 700                         goto out;
 701                 }
 702                 memcpy(info, &tmp_iface, sizeof(tmp_iface));
 703
 704                 /* add this new entry to the list */
 705                 kref_init(&info->refcount);
 706                 info->is_active = 1;
 707
 708                 cifs_dbg(FYI, "%s: adding iface %zu\n", __func__, ses->iface_count);
 709                 cifs_dbg(FYI, "%s: speed %zu bps\n", __func__, info->speed);
 710                 cifs_dbg(FYI, "%s: capabilities 0x%08x\n", __func__,
 711                          le32_to_cpu(p->Capability));
 712
 713                 spin_lock(&ses->iface_lock);
 714                 if (!list_entry_is_head(iface, &ses->iface_list, iface_head)) {
 715                         list_add_tail(&info->iface_head, &iface->iface_head);
 716                         kref_put(&iface->refcount, release_iface);
 717                 } else
 718                         list_add_tail(&info->iface_head, &ses->iface_list);
 719
 720                 ses->iface_count++;
 721                 spin_unlock(&ses->iface_lock);
 722                 ses->iface_last_update = jiffies;
 723 next_iface:
 724                 nb_iface++;
 725                 next = le32_to_cpu(p->Next);
 726                 if (!next) {
 727                         bytes_left -= sizeof(*p);
 728                         break;
 729                 }
 730                 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next);
 731                 bytes_left -= next;
 732         }
 733
 734         if (!nb_iface) {
 735                 cifs_dbg(VFS, "%s: malformed interface info\n", __func__);
 736                 rc = -EINVAL;
 737                 goto out;
 738         }
 739
 740         /* Azure rounds the buffer size up 8, to a 16 byte boundary */
 741         if ((bytes_left > 8) || p->Next)
 742                 cifs_dbg(VFS, "%s: incomplete interface info\n", __func__);
 743
 744
 745         if (!ses->iface_count) {
 746                 rc = -EINVAL;
 747                 goto out;
 748         }
 749
 750 out:
 751         return rc;
 752 }
 753
 754 int
 755 SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon, bool in_mount)
 756 {
 757         int rc;
 758         unsigned int ret_data_len = 0;
 759         struct network_interface_info_ioctl_rsp *out_buf = NULL;
 760         struct cifs_ses *ses = tcon->ses;
 761         struct TCP_Server_Info *pserver;
 762
 763         /* do not query too frequently */
 764         if (ses->iface_last_update &&
 765             time_before(jiffies, ses->iface_last_update +
 766                         (SMB_INTERFACE_POLL_INTERVAL * HZ)))
 767                 return 0;
 768
 769         rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
 770                         FSCTL_QUERY_NETWORK_INTERFACE_INFO,
 771                         NULL /* no data input */, 0 /* no data input */,
 772                         CIFSMaxBufSize, (char **)&out_buf, &ret_data_len);
 773         if (rc == -EOPNOTSUPP) {
 774                 cifs_dbg(FYI,
 775                          "server does not support query network interfaces\n");
 776                 ret_data_len = 0;
 777         } else if (rc != 0) {
 778                 cifs_tcon_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
 779                 goto out;
 780         }
 781
 782         rc = parse_server_interfaces(out_buf, ret_data_len, ses, in_mount);
 783         if (rc)
 784                 goto out;
 785
 786         /* check if iface is still active */
 787         pserver = ses->chans[0].server;
 788         if (pserver && !cifs_chan_is_iface_active(ses, pserver))
 789                 cifs_chan_update_iface(ses, pserver);
 790
 791 out:
 792         kfree(out_buf);
 793         return rc;
 794 }
 795
 796 static void
 797 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon,
 798               struct cifs_sb_info *cifs_sb)
 799 {
 800         int rc;
 801         __le16 srch_path = 0; /* Null - open root of share */
 802         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 803         struct cifs_open_parms oparms;
 804         struct cifs_fid fid;
 805         struct cached_fid *cfid = NULL;
 806
 807         oparms = (struct cifs_open_parms) {
 808                 .tcon = tcon,
 809                 .path = "",
 810                 .desired_access = FILE_READ_ATTRIBUTES,
 811                 .disposition = FILE_OPEN,
 812                 .create_options = cifs_create_options(cifs_sb, 0),
 813                 .fid = &fid,
 814         };
 815
 816         rc = open_cached_dir(xid, tcon, "", cifs_sb, false, &cfid);
 817         if (rc == 0)
 818                 memcpy(&fid, &cfid->fid, sizeof(struct cifs_fid));
 819         else
 820                 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
 821                                NULL, NULL);
 822         if (rc)
 823                 return;
 824
 825         SMB3_request_interfaces(xid, tcon, true /* called during  mount */);
 826
 827         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 828                         FS_ATTRIBUTE_INFORMATION);
 829         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 830                         FS_DEVICE_INFORMATION);
 831         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 832                         FS_VOLUME_INFORMATION);
 833         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 834                         FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
 835         if (cfid == NULL)
 836                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 837         else
 838                 close_cached_dir(cfid);
 839 }
 840
 841 static void
 842 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon,
 843               struct cifs_sb_info *cifs_sb)
 844 {
 845         int rc;
 846         __le16 srch_path = 0; /* Null - open root of share */
 847         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 848         struct cifs_open_parms oparms;
 849         struct cifs_fid fid;
 850
 851         oparms = (struct cifs_open_parms) {
 852                 .tcon = tcon,
 853                 .path = "",
 854                 .desired_access = FILE_READ_ATTRIBUTES,
 855                 .disposition = FILE_OPEN,
 856                 .create_options = cifs_create_options(cifs_sb, 0),
 857                 .fid = &fid,
 858         };
 859
 860         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
 861                        NULL, NULL);
 862         if (rc)
 863                 return;
 864
 865         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 866                         FS_ATTRIBUTE_INFORMATION);
 867         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 868                         FS_DEVICE_INFORMATION);
 869         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 870 }
 871
 872 static int
 873 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
 874                         struct cifs_sb_info *cifs_sb, const char *full_path)
 875 {
 876         __le16 *utf16_path;
 877         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 878         int err_buftype = CIFS_NO_BUFFER;
 879         struct cifs_open_parms oparms;
 880         struct kvec err_iov = {};
 881         struct cifs_fid fid;
 882         struct cached_fid *cfid;
 883         bool islink;
 884         int rc, rc2;
 885
 886         rc = open_cached_dir(xid, tcon, full_path, cifs_sb, true, &cfid);
 887         if (!rc) {
 888                 if (cfid->has_lease) {
 889                         close_cached_dir(cfid);
 890                         return 0;
 891                 }
 892                 close_cached_dir(cfid);
 893         }
 894
 895         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
 896         if (!utf16_path)
 897                 return -ENOMEM;
 898
 899         oparms = (struct cifs_open_parms) {
 900                 .tcon = tcon,
 901                 .path = full_path,
 902                 .desired_access = FILE_READ_ATTRIBUTES,
 903                 .disposition = FILE_OPEN,
 904                 .create_options = cifs_create_options(cifs_sb, 0),
 905                 .fid = &fid,
 906         };
 907
 908         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL,
 909                        &err_iov, &err_buftype);
 910         if (rc) {
 911                 struct smb2_hdr *hdr = err_iov.iov_base;
 912
 913                 if (unlikely(!hdr || err_buftype == CIFS_NO_BUFFER))
 914                         goto out;
 915
 916                 if (rc != -EREMOTE && hdr->Status == STATUS_OBJECT_NAME_INVALID) {
 917                         rc2 = cifs_inval_name_dfs_link_error(xid, tcon, cifs_sb,
 918                                                              full_path, &islink);
 919                         if (rc2) {
 920                                 rc = rc2;
 921                                 goto out;
 922                         }
 923                         if (islink)
 924                                 rc = -EREMOTE;
 925                 }
 926                 if (rc == -EREMOTE && IS_ENABLED(CONFIG_CIFS_DFS_UPCALL) && cifs_sb &&
 927                     (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_DFS))
 928                         rc = -EOPNOTSUPP;
 929                 goto out;
 930         }
 931
 932         rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 933
 934 out:
 935         free_rsp_buf(err_buftype, err_iov.iov_base);
 936         kfree(utf16_path);
 937         return rc;
 938 }
 939
 940 static int smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
 941                              struct cifs_sb_info *cifs_sb, const char *full_path,
 942                              u64 *uniqueid, struct cifs_open_info_data *data)
 943 {
 944         *uniqueid = le64_to_cpu(data->fi.IndexNumber);
 945         return 0;
 946 }
 947
 948 static int smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
 949                                 struct cifsFileInfo *cfile, struct cifs_open_info_data *data)
 950 {
 951         struct cifs_fid *fid = &cfile->fid;
 952
 953         if (cfile->symlink_target) {
 954                 data->symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL);
 955                 if (!data->symlink_target)
 956                         return -ENOMEM;
 957         }
 958         return SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid, &data->fi);
 959 }
 960
 961 #ifdef CONFIG_CIFS_XATTR
 962 static ssize_t
 963 move_smb2_ea_to_cifs(char *dst, size_t dst_size,
 964                      struct smb2_file_full_ea_info *src, size_t src_size,
 965                      const unsigned char *ea_name)
 966 {
 967         int rc = 0;
 968         unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0;
 969         char *name, *value;
 970         size_t buf_size = dst_size;
 971         size_t name_len, value_len, user_name_len;
 972
 973         while (src_size > 0) {
 974                 name_len = (size_t)src->ea_name_length;
 975                 value_len = (size_t)le16_to_cpu(src->ea_value_length);
 976
 977                 if (name_len == 0)
 978                         break;
 979
 980                 if (src_size < 8 + name_len + 1 + value_len) {
 981                         cifs_dbg(FYI, "EA entry goes beyond length of list\n");
 982                         rc = -EIO;
 983                         goto out;
 984                 }
 985
 986                 name = &src->ea_data[0];
 987                 value = &src->ea_data[src->ea_name_length + 1];
 988
 989                 if (ea_name) {
 990                         if (ea_name_len == name_len &&
 991                             memcmp(ea_name, name, name_len) == 0) {
 992                                 rc = value_len;
 993                                 if (dst_size == 0)
 994                                         goto out;
 995                                 if (dst_size < value_len) {
 996                                         rc = -ERANGE;
 997                                         goto out;
 998                                 }
 999                                 memcpy(dst, value, value_len);
1000                                 goto out;
1001                         }
1002                 } else {
1003                         /* 'user.' plus a terminating null */
1004                         user_name_len = 5 + 1 + name_len;
1005
1006                         if (buf_size == 0) {
1007                                 /* skip copy - calc size only */
1008                                 rc += user_name_len;
1009                         } else if (dst_size >= user_name_len) {
1010                                 dst_size -= user_name_len;
1011                                 memcpy(dst, "user.", 5);
1012                                 dst += 5;
1013                                 memcpy(dst, src->ea_data, name_len);
1014                                 dst += name_len;
1015                                 *dst = 0;
1016                                 ++dst;
1017                                 rc += user_name_len;
1018                         } else {
1019                                 /* stop before overrun buffer */
1020                                 rc = -ERANGE;
1021                                 break;
1022                         }
1023                 }
1024
1025                 if (!src->next_entry_offset)
1026                         break;
1027
1028                 if (src_size < le32_to_cpu(src->next_entry_offset)) {
1029                         /* stop before overrun buffer */
1030                         rc = -ERANGE;
1031                         break;
1032                 }
1033                 src_size -= le32_to_cpu(src->next_entry_offset);
1034                 src = (void *)((char *)src +
1035                                le32_to_cpu(src->next_entry_offset));
1036         }
1037
1038         /* didn't find the named attribute */
1039         if (ea_name)
1040                 rc = -ENODATA;
1041
1042 out:
1043         return (ssize_t)rc;
1044 }
1045
1046 static ssize_t
1047 smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon,
1048                const unsigned char *path, const unsigned char *ea_name,
1049                char *ea_data, size_t buf_size,
1050                struct cifs_sb_info *cifs_sb)
1051 {
1052         int rc;
1053         struct kvec rsp_iov = {NULL, 0};
1054         int buftype = CIFS_NO_BUFFER;
1055         struct smb2_query_info_rsp *rsp;
1056         struct smb2_file_full_ea_info *info = NULL;
1057
1058         rc = smb2_query_info_compound(xid, tcon, path,
1059                                       FILE_READ_EA,
1060                                       FILE_FULL_EA_INFORMATION,
1061                                       SMB2_O_INFO_FILE,
1062                                       CIFSMaxBufSize -
1063                                       MAX_SMB2_CREATE_RESPONSE_SIZE -
1064                                       MAX_SMB2_CLOSE_RESPONSE_SIZE,
1065                                       &rsp_iov, &buftype, cifs_sb);
1066         if (rc) {
1067                 /*
1068                  * If ea_name is NULL (listxattr) and there are no EAs,
1069                  * return 0 as it's not an error. Otherwise, the specified
1070                  * ea_name was not found.
1071                  */
1072                 if (!ea_name && rc == -ENODATA)
1073                         rc = 0;
1074                 goto qeas_exit;
1075         }
1076
1077         rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
1078         rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
1079                                le32_to_cpu(rsp->OutputBufferLength),
1080                                &rsp_iov,
1081                                sizeof(struct smb2_file_full_ea_info));
1082         if (rc)
1083                 goto qeas_exit;
1084
1085         info = (struct smb2_file_full_ea_info *)(
1086                         le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
1087         rc = move_smb2_ea_to_cifs(ea_data, buf_size, info,
1088                         le32_to_cpu(rsp->OutputBufferLength), ea_name);
1089
1090  qeas_exit:
1091         free_rsp_buf(buftype, rsp_iov.iov_base);
1092         return rc;
1093 }
1094
1095 static int
1096 smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
1097             const char *path, const char *ea_name, const void *ea_value,
1098             const __u16 ea_value_len, const struct nls_table *nls_codepage,
1099             struct cifs_sb_info *cifs_sb)
1100 {
1101         struct smb2_compound_vars *vars;
1102         struct cifs_ses *ses = tcon->ses;
1103         struct TCP_Server_Info *server = cifs_pick_channel(ses);
1104         struct smb_rqst *rqst;
1105         struct kvec *rsp_iov;
1106         __le16 *utf16_path = NULL;
1107         int ea_name_len = strlen(ea_name);
1108         int flags = CIFS_CP_CREATE_CLOSE_OP;
1109         int len;
1110         int resp_buftype[3];
1111         struct cifs_open_parms oparms;
1112         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1113         struct cifs_fid fid;
1114         unsigned int size[1];
1115         void *data[1];
1116         struct smb2_file_full_ea_info *ea = NULL;
1117         struct smb2_query_info_rsp *rsp;
1118         int rc, used_len = 0;
1119
1120         if (smb3_encryption_required(tcon))
1121                 flags |= CIFS_TRANSFORM_REQ;
1122
1123         if (ea_name_len > 255)
1124                 return -EINVAL;
1125
1126         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1127         if (!utf16_path)
1128                 return -ENOMEM;
1129
1130         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1131         vars = kzalloc(sizeof(*vars), GFP_KERNEL);
1132         if (!vars) {
1133                 rc = -ENOMEM;
1134                 goto out_free_path;
1135         }
1136         rqst = vars->rqst;
1137         rsp_iov = vars->rsp_iov;
1138
1139         if (ses->server->ops->query_all_EAs) {
1140                 if (!ea_value) {
1141                         rc = ses->server->ops->query_all_EAs(xid, tcon, path,
1142                                                              ea_name, NULL, 0,
1143                                                              cifs_sb);
1144                         if (rc == -ENODATA)
1145                                 goto sea_exit;
1146                 } else {
1147                         /* If we are adding a attribute we should first check
1148                          * if there will be enough space available to store
1149                          * the new EA. If not we should not add it since we
1150                          * would not be able to even read the EAs back.
1151                          */
1152                         rc = smb2_query_info_compound(xid, tcon, path,
1153                                       FILE_READ_EA,
1154                                       FILE_FULL_EA_INFORMATION,
1155                                       SMB2_O_INFO_FILE,
1156                                       CIFSMaxBufSize -
1157                                       MAX_SMB2_CREATE_RESPONSE_SIZE -
1158                                       MAX_SMB2_CLOSE_RESPONSE_SIZE,
1159                                       &rsp_iov[1], &resp_buftype[1], cifs_sb);
1160                         if (rc == 0) {
1161                                 rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
1162                                 used_len = le32_to_cpu(rsp->OutputBufferLength);
1163                         }
1164                         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1165                         resp_buftype[1] = CIFS_NO_BUFFER;
1166                         memset(&rsp_iov[1], 0, sizeof(rsp_iov[1]));
1167                         rc = 0;
1168
1169                         /* Use a fudge factor of 256 bytes in case we collide
1170                          * with a different set_EAs command.
1171                          */
1172                         if (CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE -
1173                            MAX_SMB2_CLOSE_RESPONSE_SIZE - 256 <
1174                            used_len + ea_name_len + ea_value_len + 1) {
1175                                 rc = -ENOSPC;
1176                                 goto sea_exit;
1177                         }
1178                 }
1179         }
1180
1181         /* Open */
1182         rqst[0].rq_iov = vars->open_iov;
1183         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1184
1185         oparms = (struct cifs_open_parms) {
1186                 .tcon = tcon,
1187                 .path = path,
1188                 .desired_access = FILE_WRITE_EA,
1189                 .disposition = FILE_OPEN,
1190                 .create_options = cifs_create_options(cifs_sb, 0),
1191                 .fid = &fid,
1192         };
1193
1194         rc = SMB2_open_init(tcon, server,
1195                             &rqst[0], &oplock, &oparms, utf16_path);
1196         if (rc)
1197                 goto sea_exit;
1198         smb2_set_next_command(tcon, &rqst[0]);
1199
1200
1201         /* Set Info */
1202         rqst[1].rq_iov = vars->si_iov;
1203         rqst[1].rq_nvec = 1;
1204
1205         len = sizeof(*ea) + ea_name_len + ea_value_len + 1;
1206         ea = kzalloc(len, GFP_KERNEL);
1207         if (ea == NULL) {
1208                 rc = -ENOMEM;
1209                 goto sea_exit;
1210         }
1211
1212         ea->ea_name_length = ea_name_len;
1213         ea->ea_value_length = cpu_to_le16(ea_value_len);
1214         memcpy(ea->ea_data, ea_name, ea_name_len + 1);
1215         memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len);
1216
1217         size[0] = len;
1218         data[0] = ea;
1219
1220         rc = SMB2_set_info_init(tcon, server,
1221                                 &rqst[1], COMPOUND_FID,
1222                                 COMPOUND_FID, current->tgid,
1223                                 FILE_FULL_EA_INFORMATION,
1224                                 SMB2_O_INFO_FILE, 0, data, size);
1225         if (rc)
1226                 goto sea_exit;
1227         smb2_set_next_command(tcon, &rqst[1]);
1228         smb2_set_related(&rqst[1]);
1229
1230         /* Close */
1231         rqst[2].rq_iov = &vars->close_iov;
1232         rqst[2].rq_nvec = 1;
1233         rc = SMB2_close_init(tcon, server,
1234                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
1235         if (rc)
1236                 goto sea_exit;
1237         smb2_set_related(&rqst[2]);
1238
1239         rc = compound_send_recv(xid, ses, server,
1240                                 flags, 3, rqst,
1241                                 resp_buftype, rsp_iov);
1242         /* no need to bump num_remote_opens because handle immediately closed */
1243
1244  sea_exit:
1245         kfree(ea);
1246         SMB2_open_free(&rqst[0]);
1247         SMB2_set_info_free(&rqst[1]);
1248         SMB2_close_free(&rqst[2]);
1249         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1250         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1251         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1252         kfree(vars);
1253 out_free_path:
1254         kfree(utf16_path);
1255         return rc;
1256 }
1257 #endif
1258
1259 static bool
1260 smb2_can_echo(struct TCP_Server_Info *server)
1261 {
1262         return server->echoes;
1263 }
1264
1265 static void
1266 smb2_clear_stats(struct cifs_tcon *tcon)
1267 {
1268         int i;
1269
1270         for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
1271                 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
1272                 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
1273         }
1274 }
1275
1276 static void
1277 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
1278 {
1279         seq_puts(m, "\n\tShare Capabilities:");
1280         if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
1281                 seq_puts(m, " DFS,");
1282         if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
1283                 seq_puts(m, " CONTINUOUS AVAILABILITY,");
1284         if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
1285                 seq_puts(m, " SCALEOUT,");
1286         if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
1287                 seq_puts(m, " CLUSTER,");
1288         if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
1289                 seq_puts(m, " ASYMMETRIC,");
1290         if (tcon->capabilities == 0)
1291                 seq_puts(m, " None");
1292         if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
1293                 seq_puts(m, " Aligned,");
1294         if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
1295                 seq_puts(m, " Partition Aligned,");
1296         if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
1297                 seq_puts(m, " SSD,");
1298         if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
1299                 seq_puts(m, " TRIM-support,");
1300
1301         seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
1302         seq_printf(m, "\n\ttid: 0x%x", tcon->tid);
1303         if (tcon->perf_sector_size)
1304                 seq_printf(m, "\tOptimal sector size: 0x%x",
1305                            tcon->perf_sector_size);
1306         seq_printf(m, "\tMaximal Access: 0x%x", tcon->maximal_access);
1307 }
1308
1309 static void
1310 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
1311 {
1312         atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
1313         atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
1314
1315         /*
1316          *  Can't display SMB2_NEGOTIATE, SESSION_SETUP, LOGOFF, CANCEL and ECHO
1317          *  totals (requests sent) since those SMBs are per-session not per tcon
1318          */
1319         seq_printf(m, "\nBytes read: %llu  Bytes written: %llu",
1320                    (long long)(tcon->bytes_read),
1321                    (long long)(tcon->bytes_written));
1322         seq_printf(m, "\nOpen files: %d total (local), %d open on server",
1323                    atomic_read(&tcon->num_local_opens),
1324                    atomic_read(&tcon->num_remote_opens));
1325         seq_printf(m, "\nTreeConnects: %d total %d failed",
1326                    atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
1327                    atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
1328         seq_printf(m, "\nTreeDisconnects: %d total %d failed",
1329                    atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
1330                    atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
1331         seq_printf(m, "\nCreates: %d total %d failed",
1332                    atomic_read(&sent[SMB2_CREATE_HE]),
1333                    atomic_read(&failed[SMB2_CREATE_HE]));
1334         seq_printf(m, "\nCloses: %d total %d failed",
1335                    atomic_read(&sent[SMB2_CLOSE_HE]),
1336                    atomic_read(&failed[SMB2_CLOSE_HE]));
1337         seq_printf(m, "\nFlushes: %d total %d failed",
1338                    atomic_read(&sent[SMB2_FLUSH_HE]),
1339                    atomic_read(&failed[SMB2_FLUSH_HE]));
1340         seq_printf(m, "\nReads: %d total %d failed",
1341                    atomic_read(&sent[SMB2_READ_HE]),
1342                    atomic_read(&failed[SMB2_READ_HE]));
1343         seq_printf(m, "\nWrites: %d total %d failed",
1344                    atomic_read(&sent[SMB2_WRITE_HE]),
1345                    atomic_read(&failed[SMB2_WRITE_HE]));
1346         seq_printf(m, "\nLocks: %d total %d failed",
1347                    atomic_read(&sent[SMB2_LOCK_HE]),
1348                    atomic_read(&failed[SMB2_LOCK_HE]));
1349         seq_printf(m, "\nIOCTLs: %d total %d failed",
1350                    atomic_read(&sent[SMB2_IOCTL_HE]),
1351                    atomic_read(&failed[SMB2_IOCTL_HE]));
1352         seq_printf(m, "\nQueryDirectories: %d total %d failed",
1353                    atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
1354                    atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
1355         seq_printf(m, "\nChangeNotifies: %d total %d failed",
1356                    atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
1357                    atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
1358         seq_printf(m, "\nQueryInfos: %d total %d failed",
1359                    atomic_read(&sent[SMB2_QUERY_INFO_HE]),
1360                    atomic_read(&failed[SMB2_QUERY_INFO_HE]));
1361         seq_printf(m, "\nSetInfos: %d total %d failed",
1362                    atomic_read(&sent[SMB2_SET_INFO_HE]),
1363                    atomic_read(&failed[SMB2_SET_INFO_HE]));
1364         seq_printf(m, "\nOplockBreaks: %d sent %d failed",
1365                    atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
1366                    atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
1367 }
1368
1369 static void
1370 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
1371 {
1372         struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
1373         struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
1374
1375         cfile->fid.persistent_fid = fid->persistent_fid;
1376         cfile->fid.volatile_fid = fid->volatile_fid;
1377         cfile->fid.access = fid->access;
1378 #ifdef CONFIG_CIFS_DEBUG2
1379         cfile->fid.mid = fid->mid;
1380 #endif /* CIFS_DEBUG2 */
1381         server->ops->set_oplock_level(cinode, oplock, fid->epoch,
1382                                       &fid->purge_cache);
1383         cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
1384         memcpy(cfile->fid.create_guid, fid->create_guid, 16);
1385 }
1386
1387 static void
1388 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
1389                 struct cifs_fid *fid)
1390 {
1391         SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1392 }
1393
1394 static void
1395 smb2_close_getattr(const unsigned int xid, struct cifs_tcon *tcon,
1396                    struct cifsFileInfo *cfile)
1397 {
1398         struct smb2_file_network_open_info file_inf;
1399         struct inode *inode;
1400         int rc;
1401
1402         rc = __SMB2_close(xid, tcon, cfile->fid.persistent_fid,
1403                    cfile->fid.volatile_fid, &file_inf);
1404         if (rc)
1405                 return;
1406
1407         inode = d_inode(cfile->dentry);
1408
1409         spin_lock(&inode->i_lock);
1410         CIFS_I(inode)->time = jiffies;
1411
1412         /* Creation time should not need to be updated on close */
1413         if (file_inf.LastWriteTime)
1414                 inode_set_mtime_to_ts(inode,
1415                                       cifs_NTtimeToUnix(file_inf.LastWriteTime));
1416         if (file_inf.ChangeTime)
1417                 inode_set_ctime_to_ts(inode,
1418                                       cifs_NTtimeToUnix(file_inf.ChangeTime));
1419         if (file_inf.LastAccessTime)
1420                 inode_set_atime_to_ts(inode,
1421                                       cifs_NTtimeToUnix(file_inf.LastAccessTime));
1422
1423         /*
1424          * i_blocks is not related to (i_size / i_blksize),
1425          * but instead 512 byte (2**9) size is required for
1426          * calculating num blocks.
1427          */
1428         if (le64_to_cpu(file_inf.AllocationSize) > 4096)
1429                 inode->i_blocks =
1430                         (512 - 1 + le64_to_cpu(file_inf.AllocationSize)) >> 9;
1431
1432         /* End of file and Attributes should not have to be updated on close */
1433         spin_unlock(&inode->i_lock);
1434 }
1435
1436 static int
1437 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
1438                      u64 persistent_fid, u64 volatile_fid,
1439                      struct copychunk_ioctl *pcchunk)
1440 {
1441         int rc;
1442         unsigned int ret_data_len;
1443         struct resume_key_req *res_key;
1444
1445         rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
1446                         FSCTL_SRV_REQUEST_RESUME_KEY, NULL, 0 /* no input */,
1447                         CIFSMaxBufSize, (char **)&res_key, &ret_data_len);
1448
1449         if (rc == -EOPNOTSUPP) {
1450                 pr_warn_once("Server share %s does not support copy range\n", tcon->tree_name);
1451                 goto req_res_key_exit;
1452         } else if (rc) {
1453                 cifs_tcon_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
1454                 goto req_res_key_exit;
1455         }
1456         if (ret_data_len < sizeof(struct resume_key_req)) {
1457                 cifs_tcon_dbg(VFS, "Invalid refcopy resume key length\n");
1458                 rc = -EINVAL;
1459                 goto req_res_key_exit;
1460         }
1461         memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
1462
1463 req_res_key_exit:
1464         kfree(res_key);
1465         return rc;
1466 }
1467
1468 static int
1469 smb2_ioctl_query_info(const unsigned int xid,
1470                       struct cifs_tcon *tcon,
1471                       struct cifs_sb_info *cifs_sb,
1472                       __le16 *path, int is_dir,
1473                       unsigned long p)
1474 {
1475         struct smb2_compound_vars *vars;
1476         struct smb_rqst *rqst;
1477         struct kvec *rsp_iov;
1478         struct cifs_ses *ses = tcon->ses;
1479         struct TCP_Server_Info *server = cifs_pick_channel(ses);
1480         char __user *arg = (char __user *)p;
1481         struct smb_query_info qi;
1482         struct smb_query_info __user *pqi;
1483         int rc = 0;
1484         int flags = CIFS_CP_CREATE_CLOSE_OP;
1485         struct smb2_query_info_rsp *qi_rsp = NULL;
1486         struct smb2_ioctl_rsp *io_rsp = NULL;
1487         void *buffer = NULL;
1488         int resp_buftype[3];
1489         struct cifs_open_parms oparms;
1490         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1491         struct cifs_fid fid;
1492         unsigned int size[2];
1493         void *data[2];
1494         int create_options = is_dir ? CREATE_NOT_FILE : CREATE_NOT_DIR;
1495         void (*free_req1_func)(struct smb_rqst *r);
1496
1497         vars = kzalloc(sizeof(*vars), GFP_ATOMIC);
1498         if (vars == NULL)
1499                 return -ENOMEM;
1500         rqst = &vars->rqst[0];
1501         rsp_iov = &vars->rsp_iov[0];
1502
1503         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1504
1505         if (copy_from_user(&qi, arg, sizeof(struct smb_query_info))) {
1506                 rc = -EFAULT;
1507                 goto free_vars;
1508         }
1509         if (qi.output_buffer_length > 1024) {
1510                 rc = -EINVAL;
1511                 goto free_vars;
1512         }
1513
1514         if (!ses || !server) {
1515                 rc = -EIO;
1516                 goto free_vars;
1517         }
1518
1519         if (smb3_encryption_required(tcon))
1520                 flags |= CIFS_TRANSFORM_REQ;
1521
1522         if (qi.output_buffer_length) {
1523                 buffer = memdup_user(arg + sizeof(struct smb_query_info), qi.output_buffer_length);
1524                 if (IS_ERR(buffer)) {
1525                         rc = PTR_ERR(buffer);
1526                         goto free_vars;
1527                 }
1528         }
1529
1530         /* Open */
1531         rqst[0].rq_iov = &vars->open_iov[0];
1532         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1533
1534         oparms = (struct cifs_open_parms) {
1535                 .tcon = tcon,
1536                 .disposition = FILE_OPEN,
1537                 .create_options = cifs_create_options(cifs_sb, create_options),
1538                 .fid = &fid,
1539         };
1540
1541         if (qi.flags & PASSTHRU_FSCTL) {
1542                 switch (qi.info_type & FSCTL_DEVICE_ACCESS_MASK) {
1543                 case FSCTL_DEVICE_ACCESS_FILE_READ_WRITE_ACCESS:
1544                         oparms.desired_access = FILE_READ_DATA | FILE_WRITE_DATA | FILE_READ_ATTRIBUTES | SYNCHRONIZE;
1545                         break;
1546                 case FSCTL_DEVICE_ACCESS_FILE_ANY_ACCESS:
1547                         oparms.desired_access = GENERIC_ALL;
1548                         break;
1549                 case FSCTL_DEVICE_ACCESS_FILE_READ_ACCESS:
1550                         oparms.desired_access = GENERIC_READ;
1551                         break;
1552                 case FSCTL_DEVICE_ACCESS_FILE_WRITE_ACCESS:
1553                         oparms.desired_access = GENERIC_WRITE;
1554                         break;
1555                 }
1556         } else if (qi.flags & PASSTHRU_SET_INFO) {
1557                 oparms.desired_access = GENERIC_WRITE;
1558         } else {
1559                 oparms.desired_access = FILE_READ_ATTRIBUTES | READ_CONTROL;
1560         }
1561
1562         rc = SMB2_open_init(tcon, server,
1563                             &rqst[0], &oplock, &oparms, path);
1564         if (rc)
1565                 goto free_output_buffer;
1566         smb2_set_next_command(tcon, &rqst[0]);
1567
1568         /* Query */
1569         if (qi.flags & PASSTHRU_FSCTL) {
1570                 /* Can eventually relax perm check since server enforces too */
1571                 if (!capable(CAP_SYS_ADMIN)) {
1572                         rc = -EPERM;
1573                         goto free_open_req;
1574                 }
1575                 rqst[1].rq_iov = &vars->io_iov[0];
1576                 rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
1577
1578                 rc = SMB2_ioctl_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID,
1579                                      qi.info_type, buffer, qi.output_buffer_length,
1580                                      CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE -
1581                                      MAX_SMB2_CLOSE_RESPONSE_SIZE);
1582                 free_req1_func = SMB2_ioctl_free;
1583         } else if (qi.flags == PASSTHRU_SET_INFO) {
1584                 /* Can eventually relax perm check since server enforces too */
1585                 if (!capable(CAP_SYS_ADMIN)) {
1586                         rc = -EPERM;
1587                         goto free_open_req;
1588                 }
1589                 if (qi.output_buffer_length < 8) {
1590                         rc = -EINVAL;
1591                         goto free_open_req;
1592                 }
1593                 rqst[1].rq_iov = vars->si_iov;
1594                 rqst[1].rq_nvec = 1;
1595
1596                 /* MS-FSCC 2.4.13 FileEndOfFileInformation */
1597                 size[0] = 8;
1598                 data[0] = buffer;
1599
1600                 rc = SMB2_set_info_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID,
1601                                         current->tgid, FILE_END_OF_FILE_INFORMATION,
1602                                         SMB2_O_INFO_FILE, 0, data, size);
1603                 free_req1_func = SMB2_set_info_free;
1604         } else if (qi.flags == PASSTHRU_QUERY_INFO) {
1605                 rqst[1].rq_iov = &vars->qi_iov;
1606                 rqst[1].rq_nvec = 1;
1607
1608                 rc = SMB2_query_info_init(tcon, server,
1609                                   &rqst[1], COMPOUND_FID,
1610                                   COMPOUND_FID, qi.file_info_class,
1611                                   qi.info_type, qi.additional_information,
1612                                   qi.input_buffer_length,
1613                                   qi.output_buffer_length, buffer);
1614                 free_req1_func = SMB2_query_info_free;
1615         } else { /* unknown flags */
1616                 cifs_tcon_dbg(VFS, "Invalid passthru query flags: 0x%x\n",
1617                               qi.flags);
1618                 rc = -EINVAL;
1619         }
1620
1621         if (rc)
1622                 goto free_open_req;
1623         smb2_set_next_command(tcon, &rqst[1]);
1624         smb2_set_related(&rqst[1]);
1625
1626         /* Close */
1627         rqst[2].rq_iov = &vars->close_iov;
1628         rqst[2].rq_nvec = 1;
1629
1630         rc = SMB2_close_init(tcon, server,
1631                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
1632         if (rc)
1633                 goto free_req_1;
1634         smb2_set_related(&rqst[2]);
1635
1636         rc = compound_send_recv(xid, ses, server,
1637                                 flags, 3, rqst,
1638                                 resp_buftype, rsp_iov);
1639         if (rc)
1640                 goto out;
1641
1642         /* No need to bump num_remote_opens since handle immediately closed */
1643         if (qi.flags & PASSTHRU_FSCTL) {
1644                 pqi = (struct smb_query_info __user *)arg;
1645                 io_rsp = (struct smb2_ioctl_rsp *)rsp_iov[1].iov_base;
1646                 if (le32_to_cpu(io_rsp->OutputCount) < qi.input_buffer_length)
1647                         qi.input_buffer_length = le32_to_cpu(io_rsp->OutputCount);
1648                 if (qi.input_buffer_length > 0 &&
1649                     le32_to_cpu(io_rsp->OutputOffset) + qi.input_buffer_length
1650                     > rsp_iov[1].iov_len) {
1651                         rc = -EFAULT;
1652                         goto out;
1653                 }
1654
1655                 if (copy_to_user(&pqi->input_buffer_length,
1656                                  &qi.input_buffer_length,
1657                                  sizeof(qi.input_buffer_length))) {
1658                         rc = -EFAULT;
1659                         goto out;
1660                 }
1661
1662                 if (copy_to_user((void __user *)pqi + sizeof(struct smb_query_info),
1663                                  (const void *)io_rsp + le32_to_cpu(io_rsp->OutputOffset),
1664                                  qi.input_buffer_length))
1665                         rc = -EFAULT;
1666         } else {
1667                 pqi = (struct smb_query_info __user *)arg;
1668                 qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
1669                 if (le32_to_cpu(qi_rsp->OutputBufferLength) < qi.input_buffer_length)
1670                         qi.input_buffer_length = le32_to_cpu(qi_rsp->OutputBufferLength);
1671                 if (copy_to_user(&pqi->input_buffer_length,
1672                                  &qi.input_buffer_length,
1673                                  sizeof(qi.input_buffer_length))) {
1674                         rc = -EFAULT;
1675                         goto out;
1676                 }
1677
1678                 if (copy_to_user(pqi + 1, qi_rsp->Buffer,
1679                                  qi.input_buffer_length))
1680                         rc = -EFAULT;
1681         }
1682
1683 out:
1684         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1685         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1686         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1687         SMB2_close_free(&rqst[2]);
1688 free_req_1:
1689         free_req1_func(&rqst[1]);
1690 free_open_req:
1691         SMB2_open_free(&rqst[0]);
1692 free_output_buffer:
1693         kfree(buffer);
1694 free_vars:
1695         kfree(vars);
1696         return rc;
1697 }
1698
1699 static ssize_t
1700 smb2_copychunk_range(const unsigned int xid,
1701                         struct cifsFileInfo *srcfile,
1702                         struct cifsFileInfo *trgtfile, u64 src_off,
1703                         u64 len, u64 dest_off)
1704 {
1705         int rc;
1706         unsigned int ret_data_len;
1707         struct copychunk_ioctl *pcchunk;
1708         struct copychunk_ioctl_rsp *retbuf = NULL;
1709         struct cifs_tcon *tcon;
1710         int chunks_copied = 0;
1711         bool chunk_sizes_updated = false;
1712         ssize_t bytes_written, total_bytes_written = 0;
1713
1714         pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
1715         if (pcchunk == NULL)
1716                 return -ENOMEM;
1717
1718         cifs_dbg(FYI, "%s: about to call request res key\n", __func__);
1719         /* Request a key from the server to identify the source of the copy */
1720         rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
1721                                 srcfile->fid.persistent_fid,
1722                                 srcfile->fid.volatile_fid, pcchunk);
1723
1724         /* Note: request_res_key sets res_key null only if rc !=0 */
1725         if (rc)
1726                 goto cchunk_out;
1727
1728         /* For now array only one chunk long, will make more flexible later */
1729         pcchunk->ChunkCount = cpu_to_le32(1);
1730         pcchunk->Reserved = 0;
1731         pcchunk->Reserved2 = 0;
1732
1733         tcon = tlink_tcon(trgtfile->tlink);
1734
1735         while (len > 0) {
1736                 pcchunk->SourceOffset = cpu_to_le64(src_off);
1737                 pcchunk->TargetOffset = cpu_to_le64(dest_off);
1738                 pcchunk->Length =
1739                         cpu_to_le32(min_t(u64, len, tcon->max_bytes_chunk));
1740
1741                 /* Request server copy to target from src identified by key */
1742                 kfree(retbuf);
1743                 retbuf = NULL;
1744                 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1745                         trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
1746                         (char *)pcchunk, sizeof(struct copychunk_ioctl),
1747                         CIFSMaxBufSize, (char **)&retbuf, &ret_data_len);
1748                 if (rc == 0) {
1749                         if (ret_data_len !=
1750                                         sizeof(struct copychunk_ioctl_rsp)) {
1751                                 cifs_tcon_dbg(VFS, "Invalid cchunk response size\n");
1752                                 rc = -EIO;
1753                                 goto cchunk_out;
1754                         }
1755                         if (retbuf->TotalBytesWritten == 0) {
1756                                 cifs_dbg(FYI, "no bytes copied\n");
1757                                 rc = -EIO;
1758                                 goto cchunk_out;
1759                         }
1760                         /*
1761                          * Check if server claimed to write more than we asked
1762                          */
1763                         if (le32_to_cpu(retbuf->TotalBytesWritten) >
1764                             le32_to_cpu(pcchunk->Length)) {
1765                                 cifs_tcon_dbg(VFS, "Invalid copy chunk response\n");
1766                                 rc = -EIO;
1767                                 goto cchunk_out;
1768                         }
1769                         if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
1770                                 cifs_tcon_dbg(VFS, "Invalid num chunks written\n");
1771                                 rc = -EIO;
1772                                 goto cchunk_out;
1773                         }
1774                         chunks_copied++;
1775
1776                         bytes_written = le32_to_cpu(retbuf->TotalBytesWritten);
1777                         src_off += bytes_written;
1778                         dest_off += bytes_written;
1779                         len -= bytes_written;
1780                         total_bytes_written += bytes_written;
1781
1782                         cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n",
1783                                 le32_to_cpu(retbuf->ChunksWritten),
1784                                 le32_to_cpu(retbuf->ChunkBytesWritten),
1785                                 bytes_written);
1786                 } else if (rc == -EINVAL) {
1787                         if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
1788                                 goto cchunk_out;
1789
1790                         cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
1791                                 le32_to_cpu(retbuf->ChunksWritten),
1792                                 le32_to_cpu(retbuf->ChunkBytesWritten),
1793                                 le32_to_cpu(retbuf->TotalBytesWritten));
1794
1795                         /*
1796                          * Check if this is the first request using these sizes,
1797                          * (ie check if copy succeed once with original sizes
1798                          * and check if the server gave us different sizes after
1799                          * we already updated max sizes on previous request).
1800                          * if not then why is the server returning an error now
1801                          */
1802                         if ((chunks_copied != 0) || chunk_sizes_updated)
1803                                 goto cchunk_out;
1804
1805                         /* Check that server is not asking us to grow size */
1806                         if (le32_to_cpu(retbuf->ChunkBytesWritten) <
1807                                         tcon->max_bytes_chunk)
1808                                 tcon->max_bytes_chunk =
1809                                         le32_to_cpu(retbuf->ChunkBytesWritten);
1810                         else
1811                                 goto cchunk_out; /* server gave us bogus size */
1812
1813                         /* No need to change MaxChunks since already set to 1 */
1814                         chunk_sizes_updated = true;
1815                 } else
1816                         goto cchunk_out;
1817         }
1818
1819 cchunk_out:
1820         kfree(pcchunk);
1821         kfree(retbuf);
1822         if (rc)
1823                 return rc;
1824         else
1825                 return total_bytes_written;
1826 }
1827
1828 static int
1829 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
1830                 struct cifs_fid *fid)
1831 {
1832         return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1833 }
1834
1835 static unsigned int
1836 smb2_read_data_offset(char *buf)
1837 {
1838         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1839
1840         return rsp->DataOffset;
1841 }
1842
1843 static unsigned int
1844 smb2_read_data_length(char *buf, bool in_remaining)
1845 {
1846         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1847
1848         if (in_remaining)
1849                 return le32_to_cpu(rsp->DataRemaining);
1850
1851         return le32_to_cpu(rsp->DataLength);
1852 }
1853
1854
1855 static int
1856 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,
1857                struct cifs_io_parms *parms, unsigned int *bytes_read,
1858                char **buf, int *buf_type)
1859 {
1860         parms->persistent_fid = pfid->persistent_fid;
1861         parms->volatile_fid = pfid->volatile_fid;
1862         return SMB2_read(xid, parms, bytes_read, buf, buf_type);
1863 }
1864
1865 static int
1866 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,
1867                 struct cifs_io_parms *parms, unsigned int *written,
1868                 struct kvec *iov, unsigned long nr_segs)
1869 {
1870
1871         parms->persistent_fid = pfid->persistent_fid;
1872         parms->volatile_fid = pfid->volatile_fid;
1873         return SMB2_write(xid, parms, written, iov, nr_segs);
1874 }
1875
1876 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
1877 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
1878                 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
1879 {
1880         struct cifsInodeInfo *cifsi;
1881         int rc;
1882
1883         cifsi = CIFS_I(inode);
1884
1885         /* if file already sparse don't bother setting sparse again */
1886         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
1887                 return true; /* already sparse */
1888
1889         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
1890                 return true; /* already not sparse */
1891
1892         /*
1893          * Can't check for sparse support on share the usual way via the
1894          * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
1895          * since Samba server doesn't set the flag on the share, yet
1896          * supports the set sparse FSCTL and returns sparse correctly
1897          * in the file attributes. If we fail setting sparse though we
1898          * mark that server does not support sparse files for this share
1899          * to avoid repeatedly sending the unsupported fsctl to server
1900          * if the file is repeatedly extended.
1901          */
1902         if (tcon->broken_sparse_sup)
1903                 return false;
1904
1905         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1906                         cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
1907                         &setsparse, 1, CIFSMaxBufSize, NULL, NULL);
1908         if (rc) {
1909                 tcon->broken_sparse_sup = true;
1910                 cifs_dbg(FYI, "set sparse rc = %d\n", rc);
1911                 return false;
1912         }
1913
1914         if (setsparse)
1915                 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
1916         else
1917                 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
1918
1919         return true;
1920 }
1921
1922 static int
1923 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
1924                    struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
1925 {
1926         __le64 eof = cpu_to_le64(size);
1927         struct inode *inode;
1928
1929         /*
1930          * If extending file more than one page make sparse. Many Linux fs
1931          * make files sparse by default when extending via ftruncate
1932          */
1933         inode = d_inode(cfile->dentry);
1934
1935         if (!set_alloc && (size > inode->i_size + 8192)) {
1936                 __u8 set_sparse = 1;
1937
1938                 /* whether set sparse succeeds or not, extend the file */
1939                 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
1940         }
1941
1942         return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
1943                             cfile->fid.volatile_fid, cfile->pid, &eof);
1944 }
1945
1946 static int
1947 smb2_duplicate_extents(const unsigned int xid,
1948                         struct cifsFileInfo *srcfile,
1949                         struct cifsFileInfo *trgtfile, u64 src_off,
1950                         u64 len, u64 dest_off)
1951 {
1952         int rc;
1953         unsigned int ret_data_len;
1954         struct inode *inode;
1955         struct duplicate_extents_to_file dup_ext_buf;
1956         struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink);
1957
1958         /* server fileays advertise duplicate extent support with this flag */
1959         if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) &
1960              FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0)
1961                 return -EOPNOTSUPP;
1962
1963         dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid;
1964         dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid;
1965         dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off);
1966         dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off);
1967         dup_ext_buf.ByteCount = cpu_to_le64(len);
1968         cifs_dbg(FYI, "Duplicate extents: src off %lld dst off %lld len %lld\n",
1969                 src_off, dest_off, len);
1970
1971         inode = d_inode(trgtfile->dentry);
1972         if (inode->i_size < dest_off + len) {
1973                 rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false);
1974                 if (rc)
1975                         goto duplicate_extents_out;
1976
1977                 /*
1978                  * Although also could set plausible allocation size (i_blocks)
1979                  * here in addition to setting the file size, in reflink
1980                  * it is likely that the target file is sparse. Its allocation
1981                  * size will be queried on next revalidate, but it is important
1982                  * to make sure that file's cached size is updated immediately
1983                  */
1984                 cifs_setsize(inode, dest_off + len);
1985         }
1986         rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1987                         trgtfile->fid.volatile_fid,
1988                         FSCTL_DUPLICATE_EXTENTS_TO_FILE,
1989                         (char *)&dup_ext_buf,
1990                         sizeof(struct duplicate_extents_to_file),
1991                         CIFSMaxBufSize, NULL,
1992                         &ret_data_len);
1993
1994         if (ret_data_len > 0)
1995                 cifs_dbg(FYI, "Non-zero response length in duplicate extents\n");
1996
1997 duplicate_extents_out:
1998         return rc;
1999 }
2000
2001 static int
2002 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
2003                    struct cifsFileInfo *cfile)
2004 {
2005         return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
2006                             cfile->fid.volatile_fid);
2007 }
2008
2009 static int
2010 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
2011                    struct cifsFileInfo *cfile)
2012 {
2013         struct fsctl_set_integrity_information_req integr_info;
2014         unsigned int ret_data_len;
2015
2016         integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED);
2017         integr_info.Flags = 0;
2018         integr_info.Reserved = 0;
2019
2020         return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2021                         cfile->fid.volatile_fid,
2022                         FSCTL_SET_INTEGRITY_INFORMATION,
2023                         (char *)&integr_info,
2024                         sizeof(struct fsctl_set_integrity_information_req),
2025                         CIFSMaxBufSize, NULL,
2026                         &ret_data_len);
2027
2028 }
2029
2030 /* GMT Token is @GMT-YYYY.MM.DD-HH.MM.SS Unicode which is 48 bytes + null */
2031 #define GMT_TOKEN_SIZE 50
2032
2033 #define MIN_SNAPSHOT_ARRAY_SIZE 16 /* See MS-SMB2 section 3.3.5.15.1 */
2034
2035 /*
2036  * Input buffer contains (empty) struct smb_snapshot array with size filled in
2037  * For output see struct SRV_SNAPSHOT_ARRAY in MS-SMB2 section 2.2.32.2
2038  */
2039 static int
2040 smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon,
2041                    struct cifsFileInfo *cfile, void __user *ioc_buf)
2042 {
2043         char *retbuf = NULL;
2044         unsigned int ret_data_len = 0;
2045         int rc;
2046         u32 max_response_size;
2047         struct smb_snapshot_array snapshot_in;
2048
2049         /*
2050          * On the first query to enumerate the list of snapshots available
2051          * for this volume the buffer begins with 0 (number of snapshots
2052          * which can be returned is zero since at that point we do not know
2053          * how big the buffer needs to be). On the second query,
2054          * it (ret_data_len) is set to number of snapshots so we can
2055          * know to set the maximum response size larger (see below).
2056          */
2057         if (get_user(ret_data_len, (unsigned int __user *)ioc_buf))
2058                 return -EFAULT;
2059
2060         /*
2061          * Note that for snapshot queries that servers like Azure expect that
2062          * the first query be minimal size (and just used to get the number/size
2063          * of previous versions) so response size must be specified as EXACTLY
2064          * sizeof(struct snapshot_array) which is 16 when rounded up to multiple
2065          * of eight bytes.
2066          */
2067         if (ret_data_len == 0)
2068                 max_response_size = MIN_SNAPSHOT_ARRAY_SIZE;
2069         else
2070                 max_response_size = CIFSMaxBufSize;
2071
2072         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2073                         cfile->fid.volatile_fid,
2074                         FSCTL_SRV_ENUMERATE_SNAPSHOTS,
2075                         NULL, 0 /* no input data */, max_response_size,
2076                         (char **)&retbuf,
2077                         &ret_data_len);
2078         cifs_dbg(FYI, "enum snaphots ioctl returned %d and ret buflen is %d\n",
2079                         rc, ret_data_len);
2080         if (rc)
2081                 return rc;
2082
2083         if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) {
2084                 /* Fixup buffer */
2085                 if (copy_from_user(&snapshot_in, ioc_buf,
2086                     sizeof(struct smb_snapshot_array))) {
2087                         rc = -EFAULT;
2088                         kfree(retbuf);
2089                         return rc;
2090                 }
2091
2092                 /*
2093                  * Check for min size, ie not large enough to fit even one GMT
2094                  * token (snapshot).  On the first ioctl some users may pass in
2095                  * smaller size (or zero) to simply get the size of the array
2096                  * so the user space caller can allocate sufficient memory
2097                  * and retry the ioctl again with larger array size sufficient
2098                  * to hold all of the snapshot GMT tokens on the second try.
2099                  */
2100                 if (snapshot_in.snapshot_array_size < GMT_TOKEN_SIZE)
2101                         ret_data_len = sizeof(struct smb_snapshot_array);
2102
2103                 /*
2104                  * We return struct SRV_SNAPSHOT_ARRAY, followed by
2105                  * the snapshot array (of 50 byte GMT tokens) each
2106                  * representing an available previous version of the data
2107                  */
2108                 if (ret_data_len > (snapshot_in.snapshot_array_size +
2109                                         sizeof(struct smb_snapshot_array)))
2110                         ret_data_len = snapshot_in.snapshot_array_size +
2111                                         sizeof(struct smb_snapshot_array);
2112
2113                 if (copy_to_user(ioc_buf, retbuf, ret_data_len))
2114                         rc = -EFAULT;
2115         }
2116
2117         kfree(retbuf);
2118         return rc;
2119 }
2120
2121
2122
2123 static int
2124 smb3_notify(const unsigned int xid, struct file *pfile,
2125             void __user *ioc_buf, bool return_changes)
2126 {
2127         struct smb3_notify_info notify;
2128         struct smb3_notify_info __user *pnotify_buf;
2129         struct dentry *dentry = pfile->f_path.dentry;
2130         struct inode *inode = file_inode(pfile);
2131         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2132         struct cifs_open_parms oparms;
2133         struct cifs_fid fid;
2134         struct cifs_tcon *tcon;
2135         const unsigned char *path;
2136         char *returned_ioctl_info = NULL;
2137         void *page = alloc_dentry_path();
2138         __le16 *utf16_path = NULL;
2139         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2140         int rc = 0;
2141         __u32 ret_len = 0;
2142
2143         path = build_path_from_dentry(dentry, page);
2144         if (IS_ERR(path)) {
2145                 rc = PTR_ERR(path);
2146                 goto notify_exit;
2147         }
2148
2149         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2150         if (utf16_path == NULL) {
2151                 rc = -ENOMEM;
2152                 goto notify_exit;
2153         }
2154
2155         if (return_changes) {
2156                 if (copy_from_user(&notify, ioc_buf, sizeof(struct smb3_notify_info))) {
2157                         rc = -EFAULT;
2158                         goto notify_exit;
2159                 }
2160         } else {
2161                 if (copy_from_user(&notify, ioc_buf, sizeof(struct smb3_notify))) {
2162                         rc = -EFAULT;
2163                         goto notify_exit;
2164                 }
2165                 notify.data_len = 0;
2166         }
2167
2168         tcon = cifs_sb_master_tcon(cifs_sb);
2169         oparms = (struct cifs_open_parms) {
2170                 .tcon = tcon,
2171                 .path = path,
2172                 .desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA,
2173                 .disposition = FILE_OPEN,
2174                 .create_options = cifs_create_options(cifs_sb, 0),
2175                 .fid = &fid,
2176         };
2177
2178         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,
2179                        NULL);
2180         if (rc)
2181                 goto notify_exit;
2182
2183         rc = SMB2_change_notify(xid, tcon, fid.persistent_fid, fid.volatile_fid,
2184                                 notify.watch_tree, notify.completion_filter,
2185                                 notify.data_len, &returned_ioctl_info, &ret_len);
2186
2187         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2188
2189         cifs_dbg(FYI, "change notify for path %s rc %d\n", path, rc);
2190         if (return_changes && (ret_len > 0) && (notify.data_len > 0)) {
2191                 if (ret_len > notify.data_len)
2192                         ret_len = notify.data_len;
2193                 pnotify_buf = (struct smb3_notify_info __user *)ioc_buf;
2194                 if (copy_to_user(pnotify_buf->notify_data, returned_ioctl_info, ret_len))
2195                         rc = -EFAULT;
2196                 else if (copy_to_user(&pnotify_buf->data_len, &ret_len, sizeof(ret_len)))
2197                         rc = -EFAULT;
2198         }
2199         kfree(returned_ioctl_info);
2200 notify_exit:
2201         free_dentry_path(page);
2202         kfree(utf16_path);
2203         return rc;
2204 }
2205
2206 static int
2207 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
2208                      const char *path, struct cifs_sb_info *cifs_sb,
2209                      struct cifs_fid *fid, __u16 search_flags,
2210                      struct cifs_search_info *srch_inf)
2211 {
2212         __le16 *utf16_path;
2213         struct smb_rqst rqst[2];
2214         struct kvec rsp_iov[2];
2215         int resp_buftype[2];
2216         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
2217         struct kvec qd_iov[SMB2_QUERY_DIRECTORY_IOV_SIZE];
2218         int rc, flags = 0;
2219         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2220         struct cifs_open_parms oparms;
2221         struct smb2_query_directory_rsp *qd_rsp = NULL;
2222         struct smb2_create_rsp *op_rsp = NULL;
2223         struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses);
2224         int retry_count = 0;
2225
2226         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2227         if (!utf16_path)
2228                 return -ENOMEM;
2229
2230         if (smb3_encryption_required(tcon))
2231                 flags |= CIFS_TRANSFORM_REQ;
2232
2233         memset(rqst, 0, sizeof(rqst));
2234         resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER;
2235         memset(rsp_iov, 0, sizeof(rsp_iov));
2236
2237         /* Open */
2238         memset(&open_iov, 0, sizeof(open_iov));
2239         rqst[0].rq_iov = open_iov;
2240         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2241
2242         oparms = (struct cifs_open_parms) {
2243                 .tcon = tcon,
2244                 .path = path,
2245                 .desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA,
2246                 .disposition = FILE_OPEN,
2247                 .create_options = cifs_create_options(cifs_sb, 0),
2248                 .fid = fid,
2249         };
2250
2251         rc = SMB2_open_init(tcon, server,
2252                             &rqst[0], &oplock, &oparms, utf16_path);
2253         if (rc)
2254                 goto qdf_free;
2255         smb2_set_next_command(tcon, &rqst[0]);
2256
2257         /* Query directory */
2258         srch_inf->entries_in_buffer = 0;
2259         srch_inf->index_of_last_entry = 2;
2260
2261         memset(&qd_iov, 0, sizeof(qd_iov));
2262         rqst[1].rq_iov = qd_iov;
2263         rqst[1].rq_nvec = SMB2_QUERY_DIRECTORY_IOV_SIZE;
2264
2265         rc = SMB2_query_directory_init(xid, tcon, server,
2266                                        &rqst[1],
2267                                        COMPOUND_FID, COMPOUND_FID,
2268                                        0, srch_inf->info_level);
2269         if (rc)
2270                 goto qdf_free;
2271
2272         smb2_set_related(&rqst[1]);
2273
2274 again:
2275         rc = compound_send_recv(xid, tcon->ses, server,
2276                                 flags, 2, rqst,
2277                                 resp_buftype, rsp_iov);
2278
2279         if (rc == -EAGAIN && retry_count++ < 10)
2280                 goto again;
2281
2282         /* If the open failed there is nothing to do */
2283         op_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base;
2284         if (op_rsp == NULL || op_rsp->hdr.Status != STATUS_SUCCESS) {
2285                 cifs_dbg(FYI, "query_dir_first: open failed rc=%d\n", rc);
2286                 goto qdf_free;
2287         }
2288         fid->persistent_fid = op_rsp->PersistentFileId;
2289         fid->volatile_fid = op_rsp->VolatileFileId;
2290
2291         /* Anything else than ENODATA means a genuine error */
2292         if (rc && rc != -ENODATA) {
2293                 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
2294                 cifs_dbg(FYI, "query_dir_first: query directory failed rc=%d\n", rc);
2295                 trace_smb3_query_dir_err(xid, fid->persistent_fid,
2296                                          tcon->tid, tcon->ses->Suid, 0, 0, rc);
2297                 goto qdf_free;
2298         }
2299
2300         atomic_inc(&tcon->num_remote_opens);
2301
2302         qd_rsp = (struct smb2_query_directory_rsp *)rsp_iov[1].iov_base;
2303         if (qd_rsp->hdr.Status == STATUS_NO_MORE_FILES) {
2304                 trace_smb3_query_dir_done(xid, fid->persistent_fid,
2305                                           tcon->tid, tcon->ses->Suid, 0, 0);
2306                 srch_inf->endOfSearch = true;
2307                 rc = 0;
2308                 goto qdf_free;
2309         }
2310
2311         rc = smb2_parse_query_directory(tcon, &rsp_iov[1], resp_buftype[1],
2312                                         srch_inf);
2313         if (rc) {
2314                 trace_smb3_query_dir_err(xid, fid->persistent_fid, tcon->tid,
2315                         tcon->ses->Suid, 0, 0, rc);
2316                 goto qdf_free;
2317         }
2318         resp_buftype[1] = CIFS_NO_BUFFER;
2319
2320         trace_smb3_query_dir_done(xid, fid->persistent_fid, tcon->tid,
2321                         tcon->ses->Suid, 0, srch_inf->entries_in_buffer);
2322
2323  qdf_free:
2324         kfree(utf16_path);
2325         SMB2_open_free(&rqst[0]);
2326         SMB2_query_directory_free(&rqst[1]);
2327         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2328         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2329         return rc;
2330 }
2331
2332 static int
2333 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
2334                     struct cifs_fid *fid, __u16 search_flags,
2335                     struct cifs_search_info *srch_inf)
2336 {
2337         return SMB2_query_directory(xid, tcon, fid->persistent_fid,
2338                                     fid->volatile_fid, 0, srch_inf);
2339 }
2340
2341 static int
2342 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
2343                struct cifs_fid *fid)
2344 {
2345         return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
2346 }
2347
2348 /*
2349  * If we negotiate SMB2 protocol and get STATUS_PENDING - update
2350  * the number of credits and return true. Otherwise - return false.
2351  */
2352 static bool
2353 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server)
2354 {
2355         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2356         int scredits, in_flight;
2357
2358         if (shdr->Status != STATUS_PENDING)
2359                 return false;
2360
2361         if (shdr->CreditRequest) {
2362                 spin_lock(&server->req_lock);
2363                 server->credits += le16_to_cpu(shdr->CreditRequest);
2364                 scredits = server->credits;
2365                 in_flight = server->in_flight;
2366                 spin_unlock(&server->req_lock);
2367                 wake_up(&server->request_q);
2368
2369                 trace_smb3_pend_credits(server->CurrentMid,
2370                                 server->conn_id, server->hostname, scredits,
2371                                 le16_to_cpu(shdr->CreditRequest), in_flight);
2372                 cifs_dbg(FYI, "%s: status pending add %u credits total=%d\n",
2373                                 __func__, le16_to_cpu(shdr->CreditRequest), scredits);
2374         }
2375
2376         return true;
2377 }
2378
2379 static bool
2380 smb2_is_session_expired(char *buf)
2381 {
2382         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2383
2384         if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED &&
2385             shdr->Status != STATUS_USER_SESSION_DELETED)
2386                 return false;
2387
2388         trace_smb3_ses_expired(le32_to_cpu(shdr->Id.SyncId.TreeId),
2389                                le64_to_cpu(shdr->SessionId),
2390                                le16_to_cpu(shdr->Command),
2391                                le64_to_cpu(shdr->MessageId));
2392         cifs_dbg(FYI, "Session expired or deleted\n");
2393
2394         return true;
2395 }
2396
2397 static bool
2398 smb2_is_status_io_timeout(char *buf)
2399 {
2400         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2401
2402         if (shdr->Status == STATUS_IO_TIMEOUT)
2403                 return true;
2404         else
2405                 return false;
2406 }
2407
2408 static bool
2409 smb2_is_network_name_deleted(char *buf, struct TCP_Server_Info *server)
2410 {
2411         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2412         struct TCP_Server_Info *pserver;
2413         struct cifs_ses *ses;
2414         struct cifs_tcon *tcon;
2415
2416         if (shdr->Status != STATUS_NETWORK_NAME_DELETED)
2417                 return false;
2418
2419         /* If server is a channel, select the primary channel */
2420         pserver = SERVER_IS_CHAN(server) ? server->primary_server : server;
2421
2422         spin_lock(&cifs_tcp_ses_lock);
2423         list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) {
2424                 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
2425                         if (tcon->tid == le32_to_cpu(shdr->Id.SyncId.TreeId)) {
2426                                 spin_lock(&tcon->tc_lock);
2427                                 tcon->need_reconnect = true;
2428                                 spin_unlock(&tcon->tc_lock);
2429                                 spin_unlock(&cifs_tcp_ses_lock);
2430                                 pr_warn_once("Server share %s deleted.\n",
2431                                              tcon->tree_name);
2432                                 return true;
2433                         }
2434                 }
2435         }
2436         spin_unlock(&cifs_tcp_ses_lock);
2437
2438         return false;
2439 }
2440
2441 static int
2442 smb2_oplock_response(struct cifs_tcon *tcon, __u64 persistent_fid,
2443                 __u64 volatile_fid, __u16 net_fid, struct cifsInodeInfo *cinode)
2444 {
2445         if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
2446                 return SMB2_lease_break(0, tcon, cinode->lease_key,
2447                                         smb2_get_lease_state(cinode));
2448
2449         return SMB2_oplock_break(0, tcon, persistent_fid, volatile_fid,
2450                                  CIFS_CACHE_READ(cinode) ? 1 : 0);
2451 }
2452
2453 void
2454 smb2_set_related(struct smb_rqst *rqst)
2455 {
2456         struct smb2_hdr *shdr;
2457
2458         shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base);
2459         if (shdr == NULL) {
2460                 cifs_dbg(FYI, "shdr NULL in smb2_set_related\n");
2461                 return;
2462         }
2463         shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
2464 }
2465
2466 char smb2_padding[7] = {0, 0, 0, 0, 0, 0, 0};
2467
2468 void
2469 smb2_set_next_command(struct cifs_tcon *tcon, struct smb_rqst *rqst)
2470 {
2471         struct smb2_hdr *shdr;
2472         struct cifs_ses *ses = tcon->ses;
2473         struct TCP_Server_Info *server = ses->server;
2474         unsigned long len = smb_rqst_len(server, rqst);
2475         int i, num_padding;
2476
2477         shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base);
2478         if (shdr == NULL) {
2479                 cifs_dbg(FYI, "shdr NULL in smb2_set_next_command\n");
2480                 return;
2481         }
2482
2483         /* SMB headers in a compound are 8 byte aligned. */
2484
2485         /* No padding needed */
2486         if (!(len & 7))
2487                 goto finished;
2488
2489         num_padding = 8 - (len & 7);
2490         if (!smb3_encryption_required(tcon)) {
2491                 /*
2492                  * If we do not have encryption then we can just add an extra
2493                  * iov for the padding.
2494                  */
2495                 rqst->rq_iov[rqst->rq_nvec].iov_base = smb2_padding;
2496                 rqst->rq_iov[rqst->rq_nvec].iov_len = num_padding;
2497                 rqst->rq_nvec++;
2498                 len += num_padding;
2499         } else {
2500                 /*
2501                  * We can not add a small padding iov for the encryption case
2502                  * because the encryption framework can not handle the padding
2503                  * iovs.
2504                  * We have to flatten this into a single buffer and add
2505                  * the padding to it.
2506                  */
2507                 for (i = 1; i < rqst->rq_nvec; i++) {
2508                         memcpy(rqst->rq_iov[0].iov_base +
2509                                rqst->rq_iov[0].iov_len,
2510                                rqst->rq_iov[i].iov_base,
2511                                rqst->rq_iov[i].iov_len);
2512                         rqst->rq_iov[0].iov_len += rqst->rq_iov[i].iov_len;
2513                 }
2514                 memset(rqst->rq_iov[0].iov_base + rqst->rq_iov[0].iov_len,
2515                        0, num_padding);
2516                 rqst->rq_iov[0].iov_len += num_padding;
2517                 len += num_padding;
2518                 rqst->rq_nvec = 1;
2519         }
2520
2521  finished:
2522         shdr->NextCommand = cpu_to_le32(len);
2523 }
2524
2525 /*
2526  * Passes the query info response back to the caller on success.
2527  * Caller need to free this with free_rsp_buf().
2528  */
2529 int
2530 smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon,
2531                          const char *path, u32 desired_access,
2532                          u32 class, u32 type, u32 output_len,
2533                          struct kvec *rsp, int *buftype,
2534                          struct cifs_sb_info *cifs_sb)
2535 {
2536         struct smb2_compound_vars *vars;
2537         struct cifs_ses *ses = tcon->ses;
2538         struct TCP_Server_Info *server = cifs_pick_channel(ses);
2539         int flags = CIFS_CP_CREATE_CLOSE_OP;
2540         struct smb_rqst *rqst;
2541         int resp_buftype[3];
2542         struct kvec *rsp_iov;
2543         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2544         struct cifs_open_parms oparms;
2545         struct cifs_fid fid;
2546         int rc;
2547         __le16 *utf16_path;
2548         struct cached_fid *cfid = NULL;
2549
2550         if (!path)
2551                 path = "";
2552         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2553         if (!utf16_path)
2554                 return -ENOMEM;
2555
2556         if (smb3_encryption_required(tcon))
2557                 flags |= CIFS_TRANSFORM_REQ;
2558
2559         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
2560         vars = kzalloc(sizeof(*vars), GFP_KERNEL);
2561         if (!vars) {
2562                 rc = -ENOMEM;
2563                 goto out_free_path;
2564         }
2565         rqst = vars->rqst;
2566         rsp_iov = vars->rsp_iov;
2567
2568         /*
2569          * We can only call this for things we know are directories.
2570          */
2571         if (!strcmp(path, ""))
2572                 open_cached_dir(xid, tcon, path, cifs_sb, false,
2573                                 &cfid); /* cfid null if open dir failed */
2574
2575         rqst[0].rq_iov = vars->open_iov;
2576         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2577
2578         oparms = (struct cifs_open_parms) {
2579                 .tcon = tcon,
2580                 .path = path,
2581                 .desired_access = desired_access,
2582                 .disposition = FILE_OPEN,
2583                 .create_options = cifs_create_options(cifs_sb, 0),
2584                 .fid = &fid,
2585         };
2586
2587         rc = SMB2_open_init(tcon, server,
2588                             &rqst[0], &oplock, &oparms, utf16_path);
2589         if (rc)
2590                 goto qic_exit;
2591         smb2_set_next_command(tcon, &rqst[0]);
2592
2593         rqst[1].rq_iov = &vars->qi_iov;
2594         rqst[1].rq_nvec = 1;
2595
2596         if (cfid) {
2597                 rc = SMB2_query_info_init(tcon, server,
2598                                           &rqst[1],
2599                                           cfid->fid.persistent_fid,
2600                                           cfid->fid.volatile_fid,
2601                                           class, type, 0,
2602                                           output_len, 0,
2603                                           NULL);
2604         } else {
2605                 rc = SMB2_query_info_init(tcon, server,
2606                                           &rqst[1],
2607                                           COMPOUND_FID,
2608                                           COMPOUND_FID,
2609                                           class, type, 0,
2610                                           output_len, 0,
2611                                           NULL);
2612         }
2613         if (rc)
2614                 goto qic_exit;
2615         if (!cfid) {
2616                 smb2_set_next_command(tcon, &rqst[1]);
2617                 smb2_set_related(&rqst[1]);
2618         }
2619
2620         rqst[2].rq_iov = &vars->close_iov;
2621         rqst[2].rq_nvec = 1;
2622
2623         rc = SMB2_close_init(tcon, server,
2624                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
2625         if (rc)
2626                 goto qic_exit;
2627         smb2_set_related(&rqst[2]);
2628
2629         if (cfid) {
2630                 rc = compound_send_recv(xid, ses, server,
2631                                         flags, 1, &rqst[1],
2632                                         &resp_buftype[1], &rsp_iov[1]);
2633         } else {
2634                 rc = compound_send_recv(xid, ses, server,
2635                                         flags, 3, rqst,
2636                                         resp_buftype, rsp_iov);
2637         }
2638         if (rc) {
2639                 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2640                 if (rc == -EREMCHG) {
2641                         tcon->need_reconnect = true;
2642                         pr_warn_once("server share %s deleted\n",
2643                                      tcon->tree_name);
2644                 }
2645                 goto qic_exit;
2646         }
2647         *rsp = rsp_iov[1];
2648         *buftype = resp_buftype[1];
2649
2650  qic_exit:
2651         SMB2_open_free(&rqst[0]);
2652         SMB2_query_info_free(&rqst[1]);
2653         SMB2_close_free(&rqst[2]);
2654         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2655         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
2656         if (cfid)
2657                 close_cached_dir(cfid);
2658         kfree(vars);
2659 out_free_path:
2660         kfree(utf16_path);
2661         return rc;
2662 }
2663
2664 static int
2665 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2666              struct cifs_sb_info *cifs_sb, struct kstatfs *buf)
2667 {
2668         struct smb2_query_info_rsp *rsp;
2669         struct smb2_fs_full_size_info *info = NULL;
2670         struct kvec rsp_iov = {NULL, 0};
2671         int buftype = CIFS_NO_BUFFER;
2672         int rc;
2673
2674
2675         rc = smb2_query_info_compound(xid, tcon, "",
2676                                       FILE_READ_ATTRIBUTES,
2677                                       FS_FULL_SIZE_INFORMATION,
2678                                       SMB2_O_INFO_FILESYSTEM,
2679                                       sizeof(struct smb2_fs_full_size_info),
2680                                       &rsp_iov, &buftype, cifs_sb);
2681         if (rc)
2682                 goto qfs_exit;
2683
2684         rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
2685         buf->f_type = SMB2_SUPER_MAGIC;
2686         info = (struct smb2_fs_full_size_info *)(
2687                 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
2688         rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
2689                                le32_to_cpu(rsp->OutputBufferLength),
2690                                &rsp_iov,
2691                                sizeof(struct smb2_fs_full_size_info));
2692         if (!rc)
2693                 smb2_copy_fs_info_to_kstatfs(info, buf);
2694
2695 qfs_exit:
2696         trace_smb3_qfs_done(xid, tcon->tid, tcon->ses->Suid, tcon->tree_name, rc);
2697         free_rsp_buf(buftype, rsp_iov.iov_base);
2698         return rc;
2699 }
2700
2701 static int
2702 smb311_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2703                struct cifs_sb_info *cifs_sb, struct kstatfs *buf)
2704 {
2705         int rc;
2706         __le16 srch_path = 0; /* Null - open root of share */
2707         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2708         struct cifs_open_parms oparms;
2709         struct cifs_fid fid;
2710
2711         if (!tcon->posix_extensions)
2712                 return smb2_queryfs(xid, tcon, cifs_sb, buf);
2713
2714         oparms = (struct cifs_open_parms) {
2715                 .tcon = tcon,
2716                 .path = "",
2717                 .desired_access = FILE_READ_ATTRIBUTES,
2718                 .disposition = FILE_OPEN,
2719                 .create_options = cifs_create_options(cifs_sb, 0),
2720                 .fid = &fid,
2721         };
2722
2723         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
2724                        NULL, NULL);
2725         if (rc)
2726                 return rc;
2727
2728         rc = SMB311_posix_qfs_info(xid, tcon, fid.persistent_fid,
2729                                    fid.volatile_fid, buf);
2730         buf->f_type = SMB2_SUPER_MAGIC;
2731         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2732         return rc;
2733 }
2734
2735 static bool
2736 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
2737 {
2738         return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
2739                ob1->fid.volatile_fid == ob2->fid.volatile_fid;
2740 }
2741
2742 static int
2743 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
2744                __u64 length, __u32 type, int lock, int unlock, bool wait)
2745 {
2746         if (unlock && !lock)
2747                 type = SMB2_LOCKFLAG_UNLOCK;
2748         return SMB2_lock(xid, tlink_tcon(cfile->tlink),
2749                          cfile->fid.persistent_fid, cfile->fid.volatile_fid,
2750                          current->tgid, length, offset, type, wait);
2751 }
2752
2753 static void
2754 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
2755 {
2756         memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
2757 }
2758
2759 static void
2760 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
2761 {
2762         memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
2763 }
2764
2765 static void
2766 smb2_new_lease_key(struct cifs_fid *fid)
2767 {
2768         generate_random_uuid(fid->lease_key);
2769 }
2770
2771 static int
2772 smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,
2773                    const char *search_name,
2774                    struct dfs_info3_param **target_nodes,
2775                    unsigned int *num_of_nodes,
2776                    const struct nls_table *nls_codepage, int remap)
2777 {
2778         int rc;
2779         __le16 *utf16_path = NULL;
2780         int utf16_path_len = 0;
2781         struct cifs_tcon *tcon;
2782         struct fsctl_get_dfs_referral_req *dfs_req = NULL;
2783         struct get_dfs_referral_rsp *dfs_rsp = NULL;
2784         u32 dfs_req_size = 0, dfs_rsp_size = 0;
2785         int retry_count = 0;
2786
2787         cifs_dbg(FYI, "%s: path: %s\n", __func__, search_name);
2788
2789         /*
2790          * Try to use the IPC tcon, otherwise just use any
2791          */
2792         tcon = ses->tcon_ipc;
2793         if (tcon == NULL) {
2794                 spin_lock(&cifs_tcp_ses_lock);
2795                 tcon = list_first_entry_or_null(&ses->tcon_list,
2796                                                 struct cifs_tcon,
2797                                                 tcon_list);
2798                 if (tcon)
2799                         tcon->tc_count++;
2800                 spin_unlock(&cifs_tcp_ses_lock);
2801         }
2802
2803         if (tcon == NULL) {
2804                 cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n",
2805                          ses);
2806                 rc = -ENOTCONN;
2807                 goto out;
2808         }
2809
2810         utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX,
2811                                            &utf16_path_len,
2812                                            nls_codepage, remap);
2813         if (!utf16_path) {
2814                 rc = -ENOMEM;
2815                 goto out;
2816         }
2817
2818         dfs_req_size = sizeof(*dfs_req) + utf16_path_len;
2819         dfs_req = kzalloc(dfs_req_size, GFP_KERNEL);
2820         if (!dfs_req) {
2821                 rc = -ENOMEM;
2822                 goto out;
2823         }
2824
2825         /* Highest DFS referral version understood */
2826         dfs_req->MaxReferralLevel = DFS_VERSION;
2827
2828         /* Path to resolve in an UTF-16 null-terminated string */
2829         memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len);
2830
2831         do {
2832                 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
2833                                 FSCTL_DFS_GET_REFERRALS,
2834                                 (char *)dfs_req, dfs_req_size, CIFSMaxBufSize,
2835                                 (char **)&dfs_rsp, &dfs_rsp_size);
2836                 if (!is_retryable_error(rc))
2837                         break;
2838                 usleep_range(512, 2048);
2839         } while (++retry_count < 5);
2840
2841         if (!rc && !dfs_rsp)
2842                 rc = -EIO;
2843         if (rc) {
2844                 if (!is_retryable_error(rc) && rc != -ENOENT && rc != -EOPNOTSUPP)
2845                         cifs_tcon_dbg(VFS, "%s: ioctl error: rc=%d\n", __func__, rc);
2846                 goto out;
2847         }
2848
2849         rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size,
2850                                  num_of_nodes, target_nodes,
2851                                  nls_codepage, remap, search_name,
2852                                  true /* is_unicode */);
2853         if (rc) {
2854                 cifs_tcon_dbg(VFS, "parse error in %s rc=%d\n", __func__, rc);
2855                 goto out;
2856         }
2857
2858  out:
2859         if (tcon && !tcon->ipc) {
2860                 /* ipc tcons are not refcounted */
2861                 spin_lock(&cifs_tcp_ses_lock);
2862                 tcon->tc_count--;
2863                 /* tc_count can never go negative */
2864                 WARN_ON(tcon->tc_count < 0);
2865                 spin_unlock(&cifs_tcp_ses_lock);
2866         }
2867         kfree(utf16_path);
2868         kfree(dfs_req);
2869         kfree(dfs_rsp);
2870         return rc;
2871 }
2872
2873 /* See MS-FSCC 2.1.2.6 for the 'NFS' style reparse tags */
2874 static int parse_reparse_posix(struct reparse_posix_data *buf,
2875                                struct cifs_sb_info *cifs_sb,
2876                                struct cifs_open_info_data *data)
2877 {
2878         unsigned int len;
2879         u64 type;
2880
2881         switch ((type = le64_to_cpu(buf->InodeType))) {
2882         case NFS_SPECFILE_LNK:
2883                 len = le16_to_cpu(buf->ReparseDataLength);
2884                 data->symlink_target = cifs_strndup_from_utf16(buf->DataBuffer,
2885                                                                len, true,
2886                                                                cifs_sb->local_nls);
2887                 if (!data->symlink_target)
2888                         return -ENOMEM;
2889                 convert_delimiter(data->symlink_target, '/');
2890                 cifs_dbg(FYI, "%s: target path: %s\n",
2891                          __func__, data->symlink_target);
2892                 break;
2893         case NFS_SPECFILE_CHR:
2894         case NFS_SPECFILE_BLK:
2895         case NFS_SPECFILE_FIFO:
2896         case NFS_SPECFILE_SOCK:
2897                 break;
2898         default:
2899                 cifs_dbg(VFS, "%s: unhandled inode type: 0x%llx\n",
2900                          __func__, type);
2901                 return -EOPNOTSUPP;
2902         }
2903         return 0;
2904 }
2905
2906 static int parse_reparse_symlink(struct reparse_symlink_data_buffer *sym,
2907                                  u32 plen, bool unicode,
2908                                  struct cifs_sb_info *cifs_sb,
2909                                  struct cifs_open_info_data *data)
2910 {
2911         unsigned int len;
2912         unsigned int offs;
2913
2914         /* We handle Symbolic Link reparse tag here. See: MS-FSCC 2.1.2.4 */
2915
2916         offs = le16_to_cpu(sym->SubstituteNameOffset);
2917         len = le16_to_cpu(sym->SubstituteNameLength);
2918         if (offs + 20 > plen || offs + len + 20 > plen) {
2919                 cifs_dbg(VFS, "srv returned malformed symlink buffer\n");
2920                 return -EIO;
2921         }
2922
2923         data->symlink_target = cifs_strndup_from_utf16(sym->PathBuffer + offs,
2924                                                        len, unicode,
2925                                                        cifs_sb->local_nls);
2926         if (!data->symlink_target)
2927                 return -ENOMEM;
2928
2929         convert_delimiter(data->symlink_target, '/');
2930         cifs_dbg(FYI, "%s: target path: %s\n", __func__, data->symlink_target);
2931
2932         return 0;
2933 }
2934
2935 int parse_reparse_point(struct reparse_data_buffer *buf,
2936                         u32 plen, struct cifs_sb_info *cifs_sb,
2937                         bool unicode, struct cifs_open_info_data *data)
2938 {
2939         if (plen < sizeof(*buf)) {
2940                 cifs_dbg(VFS, "%s: reparse buffer is too small. Must be at least 8 bytes but was %d\n",
2941                          __func__, plen);
2942                 return -EIO;
2943         }
2944
2945         if (plen < le16_to_cpu(buf->ReparseDataLength) + sizeof(*buf)) {
2946                 cifs_dbg(VFS, "%s: invalid reparse buf length: %d\n",
2947                          __func__, plen);
2948                 return -EIO;
2949         }
2950
2951         data->reparse.buf = buf;
2952
2953         /* See MS-FSCC 2.1.2 */
2954         switch (le32_to_cpu(buf->ReparseTag)) {
2955         case IO_REPARSE_TAG_NFS:
2956                 return parse_reparse_posix((struct reparse_posix_data *)buf,
2957                                            cifs_sb, data);
2958         case IO_REPARSE_TAG_SYMLINK:
2959                 return parse_reparse_symlink(
2960                         (struct reparse_symlink_data_buffer *)buf,
2961                         plen, unicode, cifs_sb, data);
2962         case IO_REPARSE_TAG_LX_SYMLINK:
2963         case IO_REPARSE_TAG_AF_UNIX:
2964         case IO_REPARSE_TAG_LX_FIFO:
2965         case IO_REPARSE_TAG_LX_CHR:
2966         case IO_REPARSE_TAG_LX_BLK:
2967                 return 0;
2968         default:
2969                 cifs_dbg(VFS, "%s: unhandled reparse tag: 0x%08x\n",
2970                          __func__, le32_to_cpu(buf->ReparseTag));
2971                 return -EOPNOTSUPP;
2972         }
2973 }
2974
2975 static int smb2_parse_reparse_point(struct cifs_sb_info *cifs_sb,
2976                                     struct kvec *rsp_iov,
2977                                     struct cifs_open_info_data *data)
2978 {
2979         struct reparse_data_buffer *buf;
2980         struct smb2_ioctl_rsp *io = rsp_iov->iov_base;
2981         u32 plen = le32_to_cpu(io->OutputCount);
2982
2983         buf = (struct reparse_data_buffer *)((u8 *)io +
2984                                              le32_to_cpu(io->OutputOffset));
2985         return parse_reparse_point(buf, plen, cifs_sb, true, data);
2986 }
2987
2988 static int smb2_query_reparse_point(const unsigned int xid,
2989                                     struct cifs_tcon *tcon,
2990                                     struct cifs_sb_info *cifs_sb,
2991                                     const char *full_path,
2992                                     u32 *tag, struct kvec *rsp,
2993                                     int *rsp_buftype)
2994 {
2995         struct smb2_compound_vars *vars;
2996         int rc;
2997         __le16 *utf16_path = NULL;
2998         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2999         struct cifs_open_parms oparms;
3000         struct cifs_fid fid;
3001         struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses);
3002         int flags = CIFS_CP_CREATE_CLOSE_OP;
3003         struct smb_rqst *rqst;
3004         int resp_buftype[3];
3005         struct kvec *rsp_iov;
3006         struct smb2_ioctl_rsp *ioctl_rsp;
3007         struct reparse_data_buffer *reparse_buf;
3008         u32 off, count, len;
3009
3010         cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
3011
3012         if (smb3_encryption_required(tcon))
3013                 flags |= CIFS_TRANSFORM_REQ;
3014
3015         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
3016         if (!utf16_path)
3017                 return -ENOMEM;
3018
3019         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
3020         vars = kzalloc(sizeof(*vars), GFP_KERNEL);
3021         if (!vars) {
3022                 rc = -ENOMEM;
3023                 goto out_free_path;
3024         }
3025         rqst = vars->rqst;
3026         rsp_iov = vars->rsp_iov;
3027
3028         /*
3029          * setup smb2open - TODO add optimization to call cifs_get_readable_path
3030          * to see if there is a handle already open that we can use
3031          */
3032         rqst[0].rq_iov = vars->open_iov;
3033         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
3034
3035         oparms = (struct cifs_open_parms) {
3036                 .tcon = tcon,
3037                 .path = full_path,
3038                 .desired_access = FILE_READ_ATTRIBUTES,
3039                 .disposition = FILE_OPEN,
3040                 .create_options = cifs_create_options(cifs_sb, OPEN_REPARSE_POINT),
3041                 .fid = &fid,
3042         };
3043
3044         rc = SMB2_open_init(tcon, server,
3045                             &rqst[0], &oplock, &oparms, utf16_path);
3046         if (rc)
3047                 goto query_rp_exit;
3048         smb2_set_next_command(tcon, &rqst[0]);
3049
3050
3051         /* IOCTL */
3052         rqst[1].rq_iov = vars->io_iov;
3053         rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
3054
3055         rc = SMB2_ioctl_init(tcon, server,
3056                              &rqst[1], COMPOUND_FID,
3057                              COMPOUND_FID, FSCTL_GET_REPARSE_POINT, NULL, 0,
3058                              CIFSMaxBufSize -
3059                              MAX_SMB2_CREATE_RESPONSE_SIZE -
3060                              MAX_SMB2_CLOSE_RESPONSE_SIZE);
3061         if (rc)
3062                 goto query_rp_exit;
3063
3064         smb2_set_next_command(tcon, &rqst[1]);
3065         smb2_set_related(&rqst[1]);
3066
3067         /* Close */
3068         rqst[2].rq_iov = &vars->close_iov;
3069         rqst[2].rq_nvec = 1;
3070
3071         rc = SMB2_close_init(tcon, server,
3072                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
3073         if (rc)
3074                 goto query_rp_exit;
3075
3076         smb2_set_related(&rqst[2]);
3077
3078         rc = compound_send_recv(xid, tcon->ses, server,
3079                                 flags, 3, rqst,
3080                                 resp_buftype, rsp_iov);
3081
3082         ioctl_rsp = rsp_iov[1].iov_base;
3083
3084         /*
3085          * Open was successful and we got an ioctl response.
3086          */
3087         if (rc == 0) {
3088                 /* See MS-FSCC 2.3.23 */
3089                 off = le32_to_cpu(ioctl_rsp->OutputOffset);
3090                 count = le32_to_cpu(ioctl_rsp->OutputCount);
3091                 if (check_add_overflow(off, count, &len) ||
3092                     len > rsp_iov[1].iov_len) {
3093                         cifs_tcon_dbg(VFS, "%s: invalid ioctl: off=%d count=%d\n",
3094                                       __func__, off, count);
3095                         rc = -EIO;
3096                         goto query_rp_exit;
3097                 }
3098
3099                 reparse_buf = (void *)((u8 *)ioctl_rsp + off);
3100                 len = sizeof(*reparse_buf);
3101                 if (count < len ||
3102                     count < le16_to_cpu(reparse_buf->ReparseDataLength) + len) {
3103                         cifs_tcon_dbg(VFS, "%s: invalid ioctl: off=%d count=%d\n",
3104                                       __func__, off, count);
3105                         rc = -EIO;
3106                         goto query_rp_exit;
3107                 }
3108                 *tag = le32_to_cpu(reparse_buf->ReparseTag);
3109                 *rsp = rsp_iov[1];
3110                 *rsp_buftype = resp_buftype[1];
3111                 resp_buftype[1] = CIFS_NO_BUFFER;
3112         }
3113
3114  query_rp_exit:
3115         SMB2_open_free(&rqst[0]);
3116         SMB2_ioctl_free(&rqst[1]);
3117         SMB2_close_free(&rqst[2]);
3118         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
3119         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
3120         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
3121         kfree(vars);
3122 out_free_path:
3123         kfree(utf16_path);
3124         return rc;
3125 }
3126
3127 static struct cifs_ntsd *
3128 get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb,
3129                     const struct cifs_fid *cifsfid, u32 *pacllen, u32 info)
3130 {
3131         struct cifs_ntsd *pntsd = NULL;
3132         unsigned int xid;
3133         int rc = -EOPNOTSUPP;
3134         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3135
3136         if (IS_ERR(tlink))
3137                 return ERR_CAST(tlink);
3138
3139         xid = get_xid();
3140         cifs_dbg(FYI, "trying to get acl\n");
3141
3142         rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid,
3143                             cifsfid->volatile_fid, (void **)&pntsd, pacllen,
3144                             info);
3145         free_xid(xid);
3146
3147         cifs_put_tlink(tlink);
3148
3149         cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
3150         if (rc)
3151                 return ERR_PTR(rc);
3152         return pntsd;
3153
3154 }
3155
3156 static struct cifs_ntsd *
3157 get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb,
3158                      const char *path, u32 *pacllen, u32 info)
3159 {
3160         struct cifs_ntsd *pntsd = NULL;
3161         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3162         unsigned int xid;
3163         int rc;
3164         struct cifs_tcon *tcon;
3165         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3166         struct cifs_fid fid;
3167         struct cifs_open_parms oparms;
3168         __le16 *utf16_path;
3169
3170         cifs_dbg(FYI, "get smb3 acl for path %s\n", path);
3171         if (IS_ERR(tlink))
3172                 return ERR_CAST(tlink);
3173
3174         tcon = tlink_tcon(tlink);
3175         xid = get_xid();
3176
3177         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
3178         if (!utf16_path) {
3179                 rc = -ENOMEM;
3180                 free_xid(xid);
3181                 return ERR_PTR(rc);
3182         }
3183
3184         oparms = (struct cifs_open_parms) {
3185                 .tcon = tcon,
3186                 .path = path,
3187                 .desired_access = READ_CONTROL,
3188                 .disposition = FILE_OPEN,
3189                 /*
3190                  * When querying an ACL, even if the file is a symlink
3191                  * we want to open the source not the target, and so
3192                  * the protocol requires that the client specify this
3193                  * flag when opening a reparse point
3194                  */
3195                 .create_options = cifs_create_options(cifs_sb, 0) |
3196                                   OPEN_REPARSE_POINT,
3197                 .fid = &fid,
3198         };
3199
3200         if (info & SACL_SECINFO)
3201                 oparms.desired_access |= SYSTEM_SECURITY;
3202
3203         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,
3204                        NULL);
3205         kfree(utf16_path);
3206         if (!rc) {
3207                 rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
3208                                     fid.volatile_fid, (void **)&pntsd, pacllen,
3209                                     info);
3210                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
3211         }
3212
3213         cifs_put_tlink(tlink);
3214         free_xid(xid);
3215
3216         cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
3217         if (rc)
3218                 return ERR_PTR(rc);
3219         return pntsd;
3220 }
3221
3222 static int
3223 set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen,
3224                 struct inode *inode, const char *path, int aclflag)
3225 {
3226         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3227         unsigned int xid;
3228         int rc, access_flags = 0;
3229         struct cifs_tcon *tcon;
3230         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
3231         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3232         struct cifs_fid fid;
3233         struct cifs_open_parms oparms;
3234         __le16 *utf16_path;
3235
3236         cifs_dbg(FYI, "set smb3 acl for path %s\n", path);
3237         if (IS_ERR(tlink))
3238                 return PTR_ERR(tlink);
3239
3240         tcon = tlink_tcon(tlink);
3241         xid = get_xid();
3242
3243         if (aclflag & CIFS_ACL_OWNER || aclflag & CIFS_ACL_GROUP)
3244                 access_flags |= WRITE_OWNER;
3245         if (aclflag & CIFS_ACL_SACL)
3246                 access_flags |= SYSTEM_SECURITY;
3247         if (aclflag & CIFS_ACL_DACL)
3248                 access_flags |= WRITE_DAC;
3249
3250         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
3251         if (!utf16_path) {
3252                 rc = -ENOMEM;
3253                 free_xid(xid);
3254                 return rc;
3255         }
3256
3257         oparms = (struct cifs_open_parms) {
3258                 .tcon = tcon,
3259                 .desired_access = access_flags,
3260                 .create_options = cifs_create_options(cifs_sb, 0),
3261                 .disposition = FILE_OPEN,
3262                 .path = path,
3263                 .fid = &fid,
3264         };
3265
3266         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL,
3267                        NULL, NULL);
3268         kfree(utf16_path);
3269         if (!rc) {
3270                 rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
3271                             fid.volatile_fid, pnntsd, acllen, aclflag);
3272                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
3273         }
3274
3275         cifs_put_tlink(tlink);
3276         free_xid(xid);
3277         return rc;
3278 }
3279
3280 /* Retrieve an ACL from the server */
3281 static struct cifs_ntsd *
3282 get_smb2_acl(struct cifs_sb_info *cifs_sb,
3283              struct inode *inode, const char *path,
3284              u32 *pacllen, u32 info)
3285 {
3286         struct cifs_ntsd *pntsd = NULL;
3287         struct cifsFileInfo *open_file = NULL;
3288
3289         if (inode && !(info & SACL_SECINFO))
3290                 open_file = find_readable_file(CIFS_I(inode), true);
3291         if (!open_file || (info & SACL_SECINFO))
3292                 return get_smb2_acl_by_path(cifs_sb, path, pacllen, info);
3293
3294         pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen, info);
3295         cifsFileInfo_put(open_file);
3296         return pntsd;
3297 }
3298
3299 static long smb3_zero_data(struct file *file, struct cifs_tcon *tcon,
3300                              loff_t offset, loff_t len, unsigned int xid)
3301 {
3302         struct cifsFileInfo *cfile = file->private_data;
3303         struct file_zero_data_information fsctl_buf;
3304
3305         cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
3306
3307         fsctl_buf.FileOffset = cpu_to_le64(offset);
3308         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
3309
3310         return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3311                           cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
3312                           (char *)&fsctl_buf,
3313                           sizeof(struct file_zero_data_information),
3314                           0, NULL, NULL);
3315 }
3316
3317 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
3318                             loff_t offset, loff_t len, bool keep_size)
3319 {
3320         struct cifs_ses *ses = tcon->ses;
3321         struct inode *inode = file_inode(file);
3322         struct cifsInodeInfo *cifsi = CIFS_I(inode);
3323         struct cifsFileInfo *cfile = file->private_data;
3324         unsigned long long new_size;
3325         long rc;
3326         unsigned int xid;
3327         __le64 eof;
3328
3329         xid = get_xid();
3330
3331         trace_smb3_zero_enter(xid, cfile->fid.persistent_fid, tcon->tid,
3332                               ses->Suid, offset, len);
3333
3334         inode_lock(inode);
3335         filemap_invalidate_lock(inode->i_mapping);
3336
3337         /*
3338          * We zero the range through ioctl, so we need remove the page caches
3339          * first, otherwise the data may be inconsistent with the server.
3340          */
3341         truncate_pagecache_range(inode, offset, offset + len - 1);
3342
3343         /* if file not oplocked can't be sure whether asking to extend size */
3344         rc = -EOPNOTSUPP;
3345         if (keep_size == false && !CIFS_CACHE_READ(cifsi))
3346                 goto zero_range_exit;
3347
3348         rc = smb3_zero_data(file, tcon, offset, len, xid);
3349         if (rc < 0)
3350                 goto zero_range_exit;
3351
3352         /*
3353          * do we also need to change the size of the file?
3354          */
3355         new_size = offset + len;
3356         if (keep_size == false && (unsigned long long)i_size_read(inode) < new_size) {
3357                 eof = cpu_to_le64(new_size);
3358                 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3359                                   cfile->fid.volatile_fid, cfile->pid, &eof);
3360                 if (rc >= 0) {
3361                         truncate_setsize(inode, new_size);
3362                         fscache_resize_cookie(cifs_inode_cookie(inode), new_size);
3363                 }
3364         }
3365
3366  zero_range_exit:
3367         filemap_invalidate_unlock(inode->i_mapping);
3368         inode_unlock(inode);
3369         free_xid(xid);
3370         if (rc)
3371                 trace_smb3_zero_err(xid, cfile->fid.persistent_fid, tcon->tid,
3372                               ses->Suid, offset, len, rc);
3373         else
3374                 trace_smb3_zero_done(xid, cfile->fid.persistent_fid, tcon->tid,
3375                               ses->Suid, offset, len);
3376         return rc;
3377 }
3378
3379 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
3380                             loff_t offset, loff_t len)
3381 {
3382         struct inode *inode = file_inode(file);
3383         struct cifsFileInfo *cfile = file->private_data;
3384         struct file_zero_data_information fsctl_buf;
3385         long rc;
3386         unsigned int xid;
3387         __u8 set_sparse = 1;
3388
3389         xid = get_xid();
3390
3391         inode_lock(inode);
3392         /* Need to make file sparse, if not already, before freeing range. */
3393         /* Consider adding equivalent for compressed since it could also work */
3394         if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse)) {
3395                 rc = -EOPNOTSUPP;
3396                 goto out;
3397         }
3398
3399         filemap_invalidate_lock(inode->i_mapping);
3400         /*
3401          * We implement the punch hole through ioctl, so we need remove the page
3402          * caches first, otherwise the data may be inconsistent with the server.
3403          */
3404         truncate_pagecache_range(inode, offset, offset + len - 1);
3405
3406         cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
3407
3408         fsctl_buf.FileOffset = cpu_to_le64(offset);
3409         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
3410
3411         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3412                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
3413                         (char *)&fsctl_buf,
3414                         sizeof(struct file_zero_data_information),
3415                         CIFSMaxBufSize, NULL, NULL);
3416         filemap_invalidate_unlock(inode->i_mapping);
3417 out:
3418         inode_unlock(inode);
3419         free_xid(xid);
3420         return rc;
3421 }
3422
3423 static int smb3_simple_fallocate_write_range(unsigned int xid,
3424                                              struct cifs_tcon *tcon,
3425                                              struct cifsFileInfo *cfile,
3426                                              loff_t off, loff_t len,
3427                                              char *buf)
3428 {
3429         struct cifs_io_parms io_parms = {0};
3430         int nbytes;
3431         int rc = 0;
3432         struct kvec iov[2];
3433
3434         io_parms.netfid = cfile->fid.netfid;
3435         io_parms.pid = current->tgid;
3436         io_parms.tcon = tcon;
3437         io_parms.persistent_fid = cfile->fid.persistent_fid;
3438         io_parms.volatile_fid = cfile->fid.volatile_fid;
3439
3440         while (len) {
3441                 io_parms.offset = off;
3442                 io_parms.length = len;
3443                 if (io_parms.length > SMB2_MAX_BUFFER_SIZE)
3444                         io_parms.length = SMB2_MAX_BUFFER_SIZE;
3445                 /* iov[0] is reserved for smb header */
3446                 iov[1].iov_base = buf;
3447                 iov[1].iov_len = io_parms.length;
3448                 rc = SMB2_write(xid, &io_parms, &nbytes, iov, 1);
3449                 if (rc)
3450                         break;
3451                 if (nbytes > len)
3452                         return -EINVAL;
3453                 buf += nbytes;
3454                 off += nbytes;
3455                 len -= nbytes;
3456         }
3457         return rc;
3458 }
3459
3460 static int smb3_simple_fallocate_range(unsigned int xid,
3461                                        struct cifs_tcon *tcon,
3462                                        struct cifsFileInfo *cfile,
3463                                        loff_t off, loff_t len)
3464 {
3465         struct file_allocated_range_buffer in_data, *out_data = NULL, *tmp_data;
3466         u32 out_data_len;
3467         char *buf = NULL;
3468         loff_t l;
3469         int rc;
3470
3471         in_data.file_offset = cpu_to_le64(off);
3472         in_data.length = cpu_to_le64(len);
3473         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3474                         cfile->fid.volatile_fid,
3475                         FSCTL_QUERY_ALLOCATED_RANGES,
3476                         (char *)&in_data, sizeof(in_data),
3477                         1024 * sizeof(struct file_allocated_range_buffer),
3478                         (char **)&out_data, &out_data_len);
3479         if (rc)
3480                 goto out;
3481
3482         buf = kzalloc(1024 * 1024, GFP_KERNEL);
3483         if (buf == NULL) {
3484                 rc = -ENOMEM;
3485                 goto out;
3486         }
3487
3488         tmp_data = out_data;
3489         while (len) {
3490                 /*
3491                  * The rest of the region is unmapped so write it all.
3492                  */
3493                 if (out_data_len == 0) {
3494                         rc = smb3_simple_fallocate_write_range(xid, tcon,
3495                                                cfile, off, len, buf);
3496                         goto out;
3497                 }
3498
3499                 if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
3500                         rc = -EINVAL;
3501                         goto out;
3502                 }
3503
3504                 if (off < le64_to_cpu(tmp_data->file_offset)) {
3505                         /*
3506                          * We are at a hole. Write until the end of the region
3507                          * or until the next allocated data,
3508                          * whichever comes next.
3509                          */
3510                         l = le64_to_cpu(tmp_data->file_offset) - off;
3511                         if (len < l)
3512                                 l = len;
3513                         rc = smb3_simple_fallocate_write_range(xid, tcon,
3514                                                cfile, off, l, buf);
3515                         if (rc)
3516                                 goto out;
3517                         off = off + l;
3518                         len = len - l;
3519                         if (len == 0)
3520                                 goto out;
3521                 }
3522                 /*
3523                  * We are at a section of allocated data, just skip forward
3524                  * until the end of the data or the end of the region
3525                  * we are supposed to fallocate, whichever comes first.
3526                  */
3527                 l = le64_to_cpu(tmp_data->length);
3528                 if (len < l)
3529                         l = len;
3530                 off += l;
3531                 len -= l;
3532
3533                 tmp_data = &tmp_data[1];
3534                 out_data_len -= sizeof(struct file_allocated_range_buffer);
3535         }
3536
3537  out:
3538         kfree(out_data);
3539         kfree(buf);
3540         return rc;
3541 }
3542
3543
3544 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
3545                             loff_t off, loff_t len, bool keep_size)
3546 {
3547         struct inode *inode;
3548         struct cifsInodeInfo *cifsi;
3549         struct cifsFileInfo *cfile = file->private_data;
3550         long rc = -EOPNOTSUPP;
3551         unsigned int xid;
3552         __le64 eof;
3553
3554         xid = get_xid();
3555
3556         inode = d_inode(cfile->dentry);
3557         cifsi = CIFS_I(inode);
3558
3559         trace_smb3_falloc_enter(xid, cfile->fid.persistent_fid, tcon->tid,
3560                                 tcon->ses->Suid, off, len);
3561         /* if file not oplocked can't be sure whether asking to extend size */
3562         if (!CIFS_CACHE_READ(cifsi))
3563                 if (keep_size == false) {
3564                         trace_smb3_falloc_err(xid, cfile->fid.persistent_fid,
3565                                 tcon->tid, tcon->ses->Suid, off, len, rc);
3566                         free_xid(xid);
3567                         return rc;
3568                 }
3569
3570         /*
3571          * Extending the file
3572          */
3573         if ((keep_size == false) && i_size_read(inode) < off + len) {
3574                 rc = inode_newsize_ok(inode, off + len);
3575                 if (rc)
3576                         goto out;
3577
3578                 if (cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)
3579                         smb2_set_sparse(xid, tcon, cfile, inode, false);
3580
3581                 eof = cpu_to_le64(off + len);
3582                 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3583                                   cfile->fid.volatile_fid, cfile->pid, &eof);
3584                 if (rc == 0) {
3585                         cifsi->server_eof = off + len;
3586                         cifs_setsize(inode, off + len);
3587                         cifs_truncate_page(inode->i_mapping, inode->i_size);
3588                         truncate_setsize(inode, off + len);
3589                 }
3590                 goto out;
3591         }
3592
3593         /*
3594          * Files are non-sparse by default so falloc may be a no-op
3595          * Must check if file sparse. If not sparse, and since we are not
3596          * extending then no need to do anything since file already allocated
3597          */
3598         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
3599                 rc = 0;
3600                 goto out;
3601         }
3602
3603         if (keep_size == true) {
3604                 /*
3605                  * We can not preallocate pages beyond the end of the file
3606                  * in SMB2
3607                  */
3608                 if (off >= i_size_read(inode)) {
3609                         rc = 0;
3610                         goto out;
3611                 }
3612                 /*
3613                  * For fallocates that are partially beyond the end of file,
3614                  * clamp len so we only fallocate up to the end of file.
3615                  */
3616                 if (off + len > i_size_read(inode)) {
3617                         len = i_size_read(inode) - off;
3618                 }
3619         }
3620
3621         if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
3622                 /*
3623                  * At this point, we are trying to fallocate an internal
3624                  * regions of a sparse file. Since smb2 does not have a
3625                  * fallocate command we have two otions on how to emulate this.
3626                  * We can either turn the entire file to become non-sparse
3627                  * which we only do if the fallocate is for virtually
3628                  * the whole file,  or we can overwrite the region with zeroes
3629                  * using SMB2_write, which could be prohibitevly expensive
3630                  * if len is large.
3631                  */
3632                 /*
3633                  * We are only trying to fallocate a small region so
3634                  * just write it with zero.
3635                  */
3636                 if (len <= 1024 * 1024) {
3637                         rc = smb3_simple_fallocate_range(xid, tcon, cfile,
3638                                                          off, len);
3639                         goto out;
3640                 }
3641
3642                 /*
3643                  * Check if falloc starts within first few pages of file
3644                  * and ends within a few pages of the end of file to
3645                  * ensure that most of file is being forced to be
3646                  * fallocated now. If so then setting whole file sparse
3647                  * ie potentially making a few extra pages at the beginning
3648                  * or end of the file non-sparse via set_sparse is harmless.
3649                  */
3650                 if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) {
3651                         rc = -EOPNOTSUPP;
3652                         goto out;
3653                 }
3654         }
3655
3656         smb2_set_sparse(xid, tcon, cfile, inode, false);
3657         rc = 0;
3658
3659 out:
3660         if (rc)
3661                 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, tcon->tid,
3662                                 tcon->ses->Suid, off, len, rc);
3663         else
3664                 trace_smb3_falloc_done(xid, cfile->fid.persistent_fid, tcon->tid,
3665                                 tcon->ses->Suid, off, len);
3666
3667         free_xid(xid);
3668         return rc;
3669 }
3670
3671 static long smb3_collapse_range(struct file *file, struct cifs_tcon *tcon,
3672                             loff_t off, loff_t len)
3673 {
3674         int rc;
3675         unsigned int xid;
3676         struct inode *inode = file_inode(file);
3677         struct cifsFileInfo *cfile = file->private_data;
3678         struct cifsInodeInfo *cifsi = CIFS_I(inode);
3679         __le64 eof;
3680         loff_t old_eof;
3681
3682         xid = get_xid();
3683
3684         inode_lock(inode);
3685
3686         old_eof = i_size_read(inode);
3687         if ((off >= old_eof) ||
3688             off + len >= old_eof) {
3689                 rc = -EINVAL;
3690                 goto out;
3691         }
3692
3693         filemap_invalidate_lock(inode->i_mapping);
3694         rc = filemap_write_and_wait_range(inode->i_mapping, off, old_eof - 1);
3695         if (rc < 0)
3696                 goto out_2;
3697
3698         truncate_pagecache_range(inode, off, old_eof);
3699
3700         rc = smb2_copychunk_range(xid, cfile, cfile, off + len,
3701                                   old_eof - off - len, off);
3702         if (rc < 0)
3703                 goto out_2;
3704
3705         eof = cpu_to_le64(old_eof - len);
3706         rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3707                           cfile->fid.volatile_fid, cfile->pid, &eof);
3708         if (rc < 0)
3709                 goto out_2;
3710
3711         rc = 0;
3712
3713         cifsi->server_eof = i_size_read(inode) - len;
3714         truncate_setsize(inode, cifsi->server_eof);
3715         fscache_resize_cookie(cifs_inode_cookie(inode), cifsi->server_eof);
3716 out_2:
3717         filemap_invalidate_unlock(inode->i_mapping);
3718  out:
3719         inode_unlock(inode);
3720         free_xid(xid);
3721         return rc;
3722 }
3723
3724 static long smb3_insert_range(struct file *file, struct cifs_tcon *tcon,
3725                               loff_t off, loff_t len)
3726 {
3727         int rc;
3728         unsigned int xid;
3729         struct cifsFileInfo *cfile = file->private_data;
3730         struct inode *inode = file_inode(file);
3731         __le64 eof;
3732         __u64  count, old_eof;
3733
3734         xid = get_xid();
3735
3736         inode_lock(inode);
3737
3738         old_eof = i_size_read(inode);
3739         if (off >= old_eof) {
3740                 rc = -EINVAL;
3741                 goto out;
3742         }
3743
3744         count = old_eof - off;
3745         eof = cpu_to_le64(old_eof + len);
3746
3747         filemap_invalidate_lock(inode->i_mapping);
3748         rc = filemap_write_and_wait_range(inode->i_mapping, off, old_eof + len - 1);
3749         if (rc < 0)
3750                 goto out_2;
3751         truncate_pagecache_range(inode, off, old_eof);
3752
3753         rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3754                           cfile->fid.volatile_fid, cfile->pid, &eof);
3755         if (rc < 0)
3756                 goto out_2;
3757
3758         truncate_setsize(inode, old_eof + len);
3759         fscache_resize_cookie(cifs_inode_cookie(inode), i_size_read(inode));
3760
3761         rc = smb2_copychunk_range(xid, cfile, cfile, off, count, off + len);
3762         if (rc < 0)
3763                 goto out_2;
3764
3765         rc = smb3_zero_data(file, tcon, off, len, xid);
3766         if (rc < 0)
3767                 goto out_2;
3768
3769         rc = 0;
3770 out_2:
3771         filemap_invalidate_unlock(inode->i_mapping);
3772  out:
3773         inode_unlock(inode);
3774         free_xid(xid);
3775         return rc;
3776 }
3777
3778 static loff_t smb3_llseek(struct file *file, struct cifs_tcon *tcon, loff_t offset, int whence)
3779 {
3780         struct cifsFileInfo *wrcfile, *cfile = file->private_data;
3781         struct cifsInodeInfo *cifsi;
3782         struct inode *inode;
3783         int rc = 0;
3784         struct file_allocated_range_buffer in_data, *out_data = NULL;
3785         u32 out_data_len;
3786         unsigned int xid;
3787
3788         if (whence != SEEK_HOLE && whence != SEEK_DATA)
3789                 return generic_file_llseek(file, offset, whence);
3790
3791         inode = d_inode(cfile->dentry);
3792         cifsi = CIFS_I(inode);
3793
3794         if (offset < 0 || offset >= i_size_read(inode))
3795                 return -ENXIO;
3796
3797         xid = get_xid();
3798         /*
3799          * We need to be sure that all dirty pages are written as they
3800          * might fill holes on the server.
3801          * Note that we also MUST flush any written pages since at least
3802          * some servers (Windows2016) will not reflect recent writes in
3803          * QUERY_ALLOCATED_RANGES until SMB2_flush is called.
3804          */
3805         wrcfile = find_writable_file(cifsi, FIND_WR_ANY);
3806         if (wrcfile) {
3807                 filemap_write_and_wait(inode->i_mapping);
3808                 smb2_flush_file(xid, tcon, &wrcfile->fid);
3809                 cifsFileInfo_put(wrcfile);
3810         }
3811
3812         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) {
3813                 if (whence == SEEK_HOLE)
3814                         offset = i_size_read(inode);
3815                 goto lseek_exit;
3816         }
3817
3818         in_data.file_offset = cpu_to_le64(offset);
3819         in_data.length = cpu_to_le64(i_size_read(inode));
3820
3821         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3822                         cfile->fid.volatile_fid,
3823                         FSCTL_QUERY_ALLOCATED_RANGES,
3824                         (char *)&in_data, sizeof(in_data),
3825                         sizeof(struct file_allocated_range_buffer),
3826                         (char **)&out_data, &out_data_len);
3827         if (rc == -E2BIG)
3828                 rc = 0;
3829         if (rc)
3830                 goto lseek_exit;
3831
3832         if (whence == SEEK_HOLE && out_data_len == 0)
3833                 goto lseek_exit;
3834
3835         if (whence == SEEK_DATA && out_data_len == 0) {
3836                 rc = -ENXIO;
3837                 goto lseek_exit;
3838         }
3839
3840         if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
3841                 rc = -EINVAL;
3842                 goto lseek_exit;
3843         }
3844         if (whence == SEEK_DATA) {
3845                 offset = le64_to_cpu(out_data->file_offset);
3846                 goto lseek_exit;
3847         }
3848         if (offset < le64_to_cpu(out_data->file_offset))
3849                 goto lseek_exit;
3850
3851         offset = le64_to_cpu(out_data->file_offset) + le64_to_cpu(out_data->length);
3852
3853  lseek_exit:
3854         free_xid(xid);
3855         kfree(out_data);
3856         if (!rc)
3857                 return vfs_setpos(file, offset, inode->i_sb->s_maxbytes);
3858         else
3859                 return rc;
3860 }
3861
3862 static int smb3_fiemap(struct cifs_tcon *tcon,
3863                        struct cifsFileInfo *cfile,
3864                        struct fiemap_extent_info *fei, u64 start, u64 len)
3865 {
3866         unsigned int xid;
3867         struct file_allocated_range_buffer in_data, *out_data;
3868         u32 out_data_len;
3869         int i, num, rc, flags, last_blob;
3870         u64 next;
3871
3872         rc = fiemap_prep(d_inode(cfile->dentry), fei, start, &len, 0);
3873         if (rc)
3874                 return rc;
3875
3876         xid = get_xid();
3877  again:
3878         in_data.file_offset = cpu_to_le64(start);
3879         in_data.length = cpu_to_le64(len);
3880
3881         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3882                         cfile->fid.volatile_fid,
3883                         FSCTL_QUERY_ALLOCATED_RANGES,
3884                         (char *)&in_data, sizeof(in_data),
3885                         1024 * sizeof(struct file_allocated_range_buffer),
3886                         (char **)&out_data, &out_data_len);
3887         if (rc == -E2BIG) {
3888                 last_blob = 0;
3889                 rc = 0;
3890         } else
3891                 last_blob = 1;
3892         if (rc)
3893                 goto out;
3894
3895         if (out_data_len && out_data_len < sizeof(struct file_allocated_range_buffer)) {
3896                 rc = -EINVAL;
3897                 goto out;
3898         }
3899         if (out_data_len % sizeof(struct file_allocated_range_buffer)) {
3900                 rc = -EINVAL;
3901                 goto out;
3902         }
3903
3904         num = out_data_len / sizeof(struct file_allocated_range_buffer);
3905         for (i = 0; i < num; i++) {
3906                 flags = 0;
3907                 if (i == num - 1 && last_blob)
3908                         flags |= FIEMAP_EXTENT_LAST;
3909
3910                 rc = fiemap_fill_next_extent(fei,
3911                                 le64_to_cpu(out_data[i].file_offset),
3912                                 le64_to_cpu(out_data[i].file_offset),
3913                                 le64_to_cpu(out_data[i].length),
3914                                 flags);
3915                 if (rc < 0)
3916                         goto out;
3917                 if (rc == 1) {
3918                         rc = 0;
3919                         goto out;
3920                 }
3921         }
3922
3923         if (!last_blob) {
3924                 next = le64_to_cpu(out_data[num - 1].file_offset) +
3925                   le64_to_cpu(out_data[num - 1].length);
3926                 len = len - (next - start);
3927                 start = next;
3928                 goto again;
3929         }
3930
3931  out:
3932         free_xid(xid);
3933         kfree(out_data);
3934         return rc;
3935 }
3936
3937 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
3938                            loff_t off, loff_t len)
3939 {
3940         /* KEEP_SIZE already checked for by do_fallocate */
3941         if (mode & FALLOC_FL_PUNCH_HOLE)
3942                 return smb3_punch_hole(file, tcon, off, len);
3943         else if (mode & FALLOC_FL_ZERO_RANGE) {
3944                 if (mode & FALLOC_FL_KEEP_SIZE)
3945                         return smb3_zero_range(file, tcon, off, len, true);
3946                 return smb3_zero_range(file, tcon, off, len, false);
3947         } else if (mode == FALLOC_FL_KEEP_SIZE)
3948                 return smb3_simple_falloc(file, tcon, off, len, true);
3949         else if (mode == FALLOC_FL_COLLAPSE_RANGE)
3950                 return smb3_collapse_range(file, tcon, off, len);
3951         else if (mode == FALLOC_FL_INSERT_RANGE)
3952                 return smb3_insert_range(file, tcon, off, len);
3953         else if (mode == 0)
3954                 return smb3_simple_falloc(file, tcon, off, len, false);
3955
3956         return -EOPNOTSUPP;
3957 }
3958
3959 static void
3960 smb2_downgrade_oplock(struct TCP_Server_Info *server,
3961                       struct cifsInodeInfo *cinode, __u32 oplock,
3962                       unsigned int epoch, bool *purge_cache)
3963 {
3964         server->ops->set_oplock_level(cinode, oplock, 0, NULL);
3965 }
3966
3967 static void
3968 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3969                        unsigned int epoch, bool *purge_cache);
3970
3971 static void
3972 smb3_downgrade_oplock(struct TCP_Server_Info *server,
3973                        struct cifsInodeInfo *cinode, __u32 oplock,
3974                        unsigned int epoch, bool *purge_cache)
3975 {
3976         unsigned int old_state = cinode->oplock;
3977         unsigned int old_epoch = cinode->epoch;
3978         unsigned int new_state;
3979
3980         if (epoch > old_epoch) {
3981                 smb21_set_oplock_level(cinode, oplock, 0, NULL);
3982                 cinode->epoch = epoch;
3983         }
3984
3985         new_state = cinode->oplock;
3986         *purge_cache = false;
3987
3988         if ((old_state & CIFS_CACHE_READ_FLG) != 0 &&
3989             (new_state & CIFS_CACHE_READ_FLG) == 0)
3990                 *purge_cache = true;
3991         else if (old_state == new_state && (epoch - old_epoch > 1))
3992                 *purge_cache = true;
3993 }
3994
3995 static void
3996 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3997                       unsigned int epoch, bool *purge_cache)
3998 {
3999         oplock &= 0xFF;
4000         cinode->lease_granted = false;
4001         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
4002                 return;
4003         if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
4004                 cinode->oplock = CIFS_CACHE_RHW_FLG;
4005                 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
4006                          &cinode->netfs.inode);
4007         } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
4008                 cinode->oplock = CIFS_CACHE_RW_FLG;
4009                 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
4010                          &cinode->netfs.inode);
4011         } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
4012                 cinode->oplock = CIFS_CACHE_READ_FLG;
4013                 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
4014                          &cinode->netfs.inode);
4015         } else
4016                 cinode->oplock = 0;
4017 }
4018
4019 static void
4020 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
4021                        unsigned int epoch, bool *purge_cache)
4022 {
4023         char message[5] = {0};
4024         unsigned int new_oplock = 0;
4025
4026         oplock &= 0xFF;
4027         cinode->lease_granted = true;
4028         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
4029                 return;
4030
4031         /* Check if the server granted an oplock rather than a lease */
4032         if (oplock & SMB2_OPLOCK_LEVEL_EXCLUSIVE)
4033                 return smb2_set_oplock_level(cinode, oplock, epoch,
4034                                              purge_cache);
4035
4036         if (oplock & SMB2_LEASE_READ_CACHING_HE) {
4037                 new_oplock |= CIFS_CACHE_READ_FLG;
4038                 strcat(message, "R");
4039         }
4040         if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
4041                 new_oplock |= CIFS_CACHE_HANDLE_FLG;
4042                 strcat(message, "H");
4043         }
4044         if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
4045                 new_oplock |= CIFS_CACHE_WRITE_FLG;
4046                 strcat(message, "W");
4047         }
4048         if (!new_oplock)
4049                 strncpy(message, "None", sizeof(message));
4050
4051         cinode->oplock = new_oplock;
4052         cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
4053                  &cinode->netfs.inode);
4054 }
4055
4056 static void
4057 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
4058                       unsigned int epoch, bool *purge_cache)
4059 {
4060         unsigned int old_oplock = cinode->oplock;
4061
4062         smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
4063
4064         if (purge_cache) {
4065                 *purge_cache = false;
4066                 if (old_oplock == CIFS_CACHE_READ_FLG) {
4067                         if (cinode->oplock == CIFS_CACHE_READ_FLG &&
4068                             (epoch - cinode->epoch > 0))
4069                                 *purge_cache = true;
4070                         else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
4071                                  (epoch - cinode->epoch > 1))
4072                                 *purge_cache = true;
4073                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
4074                                  (epoch - cinode->epoch > 1))
4075                                 *purge_cache = true;
4076                         else if (cinode->oplock == 0 &&
4077                                  (epoch - cinode->epoch > 0))
4078                                 *purge_cache = true;
4079                 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
4080                         if (cinode->oplock == CIFS_CACHE_RH_FLG &&
4081                             (epoch - cinode->epoch > 0))
4082                                 *purge_cache = true;
4083                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
4084                                  (epoch - cinode->epoch > 1))
4085                                 *purge_cache = true;
4086                 }
4087                 cinode->epoch = epoch;
4088         }
4089 }
4090
4091 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
4092 static bool
4093 smb2_is_read_op(__u32 oplock)
4094 {
4095         return oplock == SMB2_OPLOCK_LEVEL_II;
4096 }
4097 #endif /* CIFS_ALLOW_INSECURE_LEGACY */
4098
4099 static bool
4100 smb21_is_read_op(__u32 oplock)
4101 {
4102         return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
4103                !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
4104 }
4105
4106 static __le32
4107 map_oplock_to_lease(u8 oplock)
4108 {
4109         if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
4110                 return SMB2_LEASE_WRITE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE;
4111         else if (oplock == SMB2_OPLOCK_LEVEL_II)
4112                 return SMB2_LEASE_READ_CACHING_LE;
4113         else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
4114                 return SMB2_LEASE_HANDLE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE |
4115                        SMB2_LEASE_WRITE_CACHING_LE;
4116         return 0;
4117 }
4118
4119 static char *
4120 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
4121 {
4122         struct create_lease *buf;
4123
4124         buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
4125         if (!buf)
4126                 return NULL;
4127
4128         memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
4129         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
4130
4131         buf->ccontext.DataOffset = cpu_to_le16(offsetof
4132                                         (struct create_lease, lcontext));
4133         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
4134         buf->ccontext.NameOffset = cpu_to_le16(offsetof
4135                                 (struct create_lease, Name));
4136         buf->ccontext.NameLength = cpu_to_le16(4);
4137         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
4138         buf->Name[0] = 'R';
4139         buf->Name[1] = 'q';
4140         buf->Name[2] = 'L';
4141         buf->Name[3] = 's';
4142         return (char *)buf;
4143 }
4144
4145 static char *
4146 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
4147 {
4148         struct create_lease_v2 *buf;
4149
4150         buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
4151         if (!buf)
4152                 return NULL;
4153
4154         memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
4155         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
4156
4157         buf->ccontext.DataOffset = cpu_to_le16(offsetof
4158                                         (struct create_lease_v2, lcontext));
4159         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
4160         buf->ccontext.NameOffset = cpu_to_le16(offsetof
4161                                 (struct create_lease_v2, Name));
4162         buf->ccontext.NameLength = cpu_to_le16(4);
4163         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
4164         buf->Name[0] = 'R';
4165         buf->Name[1] = 'q';
4166         buf->Name[2] = 'L';
4167         buf->Name[3] = 's';
4168         return (char *)buf;
4169 }
4170
4171 static __u8
4172 smb2_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
4173 {
4174         struct create_lease *lc = (struct create_lease *)buf;
4175
4176         *epoch = 0; /* not used */
4177         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE)
4178                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
4179         return le32_to_cpu(lc->lcontext.LeaseState);
4180 }
4181
4182 static __u8
4183 smb3_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
4184 {
4185         struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
4186
4187         *epoch = le16_to_cpu(lc->lcontext.Epoch);
4188         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE)
4189                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
4190         if (lease_key)
4191                 memcpy(lease_key, &lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE);
4192         return le32_to_cpu(lc->lcontext.LeaseState);
4193 }
4194
4195 static unsigned int
4196 smb2_wp_retry_size(struct inode *inode)
4197 {
4198         return min_t(unsigned int, CIFS_SB(inode->i_sb)->ctx->wsize,
4199                      SMB2_MAX_BUFFER_SIZE);
4200 }
4201
4202 static bool
4203 smb2_dir_needs_close(struct cifsFileInfo *cfile)
4204 {
4205         return !cfile->invalidHandle;
4206 }
4207
4208 static void
4209 fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len,
4210                    struct smb_rqst *old_rq, __le16 cipher_type)
4211 {
4212         struct smb2_hdr *shdr =
4213                         (struct smb2_hdr *)old_rq->rq_iov[0].iov_base;
4214
4215         memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr));
4216         tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
4217         tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
4218         tr_hdr->Flags = cpu_to_le16(0x01);
4219         if ((cipher_type == SMB2_ENCRYPTION_AES128_GCM) ||
4220             (cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4221                 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
4222         else
4223                 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
4224         memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8);
4225 }
4226
4227 static void *smb2_aead_req_alloc(struct crypto_aead *tfm, const struct smb_rqst *rqst,
4228                                  int num_rqst, const u8 *sig, u8 **iv,
4229                                  struct aead_request **req, struct sg_table *sgt,
4230                                  unsigned int *num_sgs, size_t *sensitive_size)
4231 {
4232         unsigned int req_size = sizeof(**req) + crypto_aead_reqsize(tfm);
4233         unsigned int iv_size = crypto_aead_ivsize(tfm);
4234         unsigned int len;
4235         u8 *p;
4236
4237         *num_sgs = cifs_get_num_sgs(rqst, num_rqst, sig);
4238         if (IS_ERR_VALUE((long)(int)*num_sgs))
4239                 return ERR_PTR(*num_sgs);
4240
4241         len = iv_size;
4242         len += crypto_aead_alignmask(tfm) & ~(crypto_tfm_ctx_alignment() - 1);
4243         len = ALIGN(len, crypto_tfm_ctx_alignment());
4244         len += req_size;
4245         len = ALIGN(len, __alignof__(struct scatterlist));
4246         len += array_size(*num_sgs, sizeof(struct scatterlist));
4247         *sensitive_size = len;
4248
4249         p = kvzalloc(len, GFP_NOFS);
4250         if (!p)
4251                 return ERR_PTR(-ENOMEM);
4252
4253         *iv = (u8 *)PTR_ALIGN(p, crypto_aead_alignmask(tfm) + 1);
4254         *req = (struct aead_request *)PTR_ALIGN(*iv + iv_size,
4255                                                 crypto_tfm_ctx_alignment());
4256         sgt->sgl = (struct scatterlist *)PTR_ALIGN((u8 *)*req + req_size,
4257                                                    __alignof__(struct scatterlist));
4258         return p;
4259 }
4260
4261 static void *smb2_get_aead_req(struct crypto_aead *tfm, struct smb_rqst *rqst,
4262                                int num_rqst, const u8 *sig, u8 **iv,
4263                                struct aead_request **req, struct scatterlist **sgl,
4264                                size_t *sensitive_size)
4265 {
4266         struct sg_table sgtable = {};
4267         unsigned int skip, num_sgs, i, j;
4268         ssize_t rc;
4269         void *p;
4270
4271         p = smb2_aead_req_alloc(tfm, rqst, num_rqst, sig, iv, req, &sgtable,
4272                                 &num_sgs, sensitive_size);
4273         if (IS_ERR(p))
4274                 return ERR_CAST(p);
4275
4276         sg_init_marker(sgtable.sgl, num_sgs);
4277
4278         /*
4279          * The first rqst has a transform header where the
4280          * first 20 bytes are not part of the encrypted blob.
4281          */
4282         skip = 20;
4283
4284         for (i = 0; i < num_rqst; i++) {
4285                 struct iov_iter *iter = &rqst[i].rq_iter;
4286                 size_t count = iov_iter_count(iter);
4287
4288                 for (j = 0; j < rqst[i].rq_nvec; j++) {
4289                         cifs_sg_set_buf(&sgtable,
4290                                         rqst[i].rq_iov[j].iov_base + skip,
4291                                         rqst[i].rq_iov[j].iov_len - skip);
4292
4293                         /* See the above comment on the 'skip' assignment */
4294                         skip = 0;
4295                 }
4296                 sgtable.orig_nents = sgtable.nents;
4297
4298                 rc = extract_iter_to_sg(iter, count, &sgtable,
4299                                         num_sgs - sgtable.nents, 0);
4300                 iov_iter_revert(iter, rc);
4301                 sgtable.orig_nents = sgtable.nents;
4302         }
4303
4304         cifs_sg_set_buf(&sgtable, sig, SMB2_SIGNATURE_SIZE);
4305         sg_mark_end(&sgtable.sgl[sgtable.nents - 1]);
4306         *sgl = sgtable.sgl;
4307         return p;
4308 }
4309
4310 static int
4311 smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key)
4312 {
4313         struct TCP_Server_Info *pserver;
4314         struct cifs_ses *ses;
4315         u8 *ses_enc_key;
4316
4317         /* If server is a channel, select the primary channel */
4318         pserver = SERVER_IS_CHAN(server) ? server->primary_server : server;
4319
4320         spin_lock(&cifs_tcp_ses_lock);
4321         list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) {
4322                 if (ses->Suid == ses_id) {
4323                         spin_lock(&ses->ses_lock);
4324                         ses_enc_key = enc ? ses->smb3encryptionkey :
4325                                 ses->smb3decryptionkey;
4326                         memcpy(key, ses_enc_key, SMB3_ENC_DEC_KEY_SIZE);
4327                         spin_unlock(&ses->ses_lock);
4328                         spin_unlock(&cifs_tcp_ses_lock);
4329                         return 0;
4330                 }
4331         }
4332         spin_unlock(&cifs_tcp_ses_lock);
4333
4334         trace_smb3_ses_not_found(ses_id);
4335
4336         return -EAGAIN;
4337 }
4338 /*
4339  * Encrypt or decrypt @rqst message. @rqst[0] has the following format:
4340  * iov[0]   - transform header (associate data),
4341  * iov[1-N] - SMB2 header and pages - data to encrypt.
4342  * On success return encrypted data in iov[1-N] and pages, leave iov[0]
4343  * untouched.
4344  */
4345 static int
4346 crypt_message(struct TCP_Server_Info *server, int num_rqst,
4347               struct smb_rqst *rqst, int enc)
4348 {
4349         struct smb2_transform_hdr *tr_hdr =
4350                 (struct smb2_transform_hdr *)rqst[0].rq_iov[0].iov_base;
4351         unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20;
4352         int rc = 0;
4353         struct scatterlist *sg;
4354         u8 sign[SMB2_SIGNATURE_SIZE] = {};
4355         u8 key[SMB3_ENC_DEC_KEY_SIZE];
4356         struct aead_request *req;
4357         u8 *iv;
4358         DECLARE_CRYPTO_WAIT(wait);
4359         struct crypto_aead *tfm;
4360         unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
4361         void *creq;
4362         size_t sensitive_size;
4363
4364         rc = smb2_get_enc_key(server, le64_to_cpu(tr_hdr->SessionId), enc, key);
4365         if (rc) {
4366                 cifs_server_dbg(FYI, "%s: Could not get %scryption key. sid: 0x%llx\n", __func__,
4367                          enc ? "en" : "de", le64_to_cpu(tr_hdr->SessionId));
4368                 return rc;
4369         }
4370
4371         rc = smb3_crypto_aead_allocate(server);
4372         if (rc) {
4373                 cifs_server_dbg(VFS, "%s: crypto alloc failed\n", __func__);
4374                 return rc;
4375         }
4376
4377         tfm = enc ? server->secmech.enc : server->secmech.dec;
4378
4379         if ((server->cipher_type == SMB2_ENCRYPTION_AES256_CCM) ||
4380                 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4381                 rc = crypto_aead_setkey(tfm, key, SMB3_GCM256_CRYPTKEY_SIZE);
4382         else
4383                 rc = crypto_aead_setkey(tfm, key, SMB3_GCM128_CRYPTKEY_SIZE);
4384
4385         if (rc) {
4386                 cifs_server_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc);
4387                 return rc;
4388         }
4389
4390         rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE);
4391         if (rc) {
4392                 cifs_server_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc);
4393                 return rc;
4394         }
4395
4396         creq = smb2_get_aead_req(tfm, rqst, num_rqst, sign, &iv, &req, &sg,
4397                                  &sensitive_size);
4398         if (IS_ERR(creq))
4399                 return PTR_ERR(creq);
4400
4401         if (!enc) {
4402                 memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE);
4403                 crypt_len += SMB2_SIGNATURE_SIZE;
4404         }
4405
4406         if ((server->cipher_type == SMB2_ENCRYPTION_AES128_GCM) ||
4407             (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4408                 memcpy(iv, (char *)tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
4409         else {
4410                 iv[0] = 3;
4411                 memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
4412         }
4413
4414         aead_request_set_tfm(req, tfm);
4415         aead_request_set_crypt(req, sg, sg, crypt_len, iv);
4416         aead_request_set_ad(req, assoc_data_len);
4417
4418         aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
4419                                   crypto_req_done, &wait);
4420
4421         rc = crypto_wait_req(enc ? crypto_aead_encrypt(req)
4422                                 : crypto_aead_decrypt(req), &wait);
4423
4424         if (!rc && enc)
4425                 memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE);
4426
4427         kvfree_sensitive(creq, sensitive_size);
4428         return rc;
4429 }
4430
4431 /*
4432  * Clear a read buffer, discarding the folios which have XA_MARK_0 set.
4433  */
4434 static void cifs_clear_xarray_buffer(struct xarray *buffer)
4435 {
4436         struct folio *folio;
4437
4438         XA_STATE(xas, buffer, 0);
4439
4440         rcu_read_lock();
4441         xas_for_each_marked(&xas, folio, ULONG_MAX, XA_MARK_0) {
4442                 folio_put(folio);
4443         }
4444         rcu_read_unlock();
4445         xa_destroy(buffer);
4446 }
4447
4448 void
4449 smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst)
4450 {
4451         int i;
4452
4453         for (i = 0; i < num_rqst; i++)
4454                 if (!xa_empty(&rqst[i].rq_buffer))
4455                         cifs_clear_xarray_buffer(&rqst[i].rq_buffer);
4456 }
4457
4458 /*
4459  * This function will initialize new_rq and encrypt the content.
4460  * The first entry, new_rq[0], only contains a single iov which contains
4461  * a smb2_transform_hdr and is pre-allocated by the caller.
4462  * This function then populates new_rq[1+] with the content from olq_rq[0+].
4463  *
4464  * The end result is an array of smb_rqst structures where the first structure
4465  * only contains a single iov for the transform header which we then can pass
4466  * to crypt_message().
4467  *
4468  * new_rq[0].rq_iov[0] :  smb2_transform_hdr pre-allocated by the caller
4469  * new_rq[1+].rq_iov[*] == old_rq[0+].rq_iov[*] : SMB2/3 requests
4470  */
4471 static int
4472 smb3_init_transform_rq(struct TCP_Server_Info *server, int num_rqst,
4473                        struct smb_rqst *new_rq, struct smb_rqst *old_rq)
4474 {
4475         struct smb2_transform_hdr *tr_hdr = new_rq[0].rq_iov[0].iov_base;
4476         struct page *page;
4477         unsigned int orig_len = 0;
4478         int i, j;
4479         int rc = -ENOMEM;
4480
4481         for (i = 1; i < num_rqst; i++) {
4482                 struct smb_rqst *old = &old_rq[i - 1];
4483                 struct smb_rqst *new = &new_rq[i];
4484                 struct xarray *buffer = &new->rq_buffer;
4485                 size_t size = iov_iter_count(&old->rq_iter), seg, copied = 0;
4486
4487                 orig_len += smb_rqst_len(server, old);
4488                 new->rq_iov = old->rq_iov;
4489                 new->rq_nvec = old->rq_nvec;
4490
4491                 xa_init(buffer);
4492
4493                 if (size > 0) {
4494                         unsigned int npages = DIV_ROUND_UP(size, PAGE_SIZE);
4495
4496                         for (j = 0; j < npages; j++) {
4497                                 void *o;
4498
4499                                 rc = -ENOMEM;
4500                                 page = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
4501                                 if (!page)
4502                                         goto err_free;
4503                                 page->index = j;
4504                                 o = xa_store(buffer, j, page, GFP_KERNEL);
4505                                 if (xa_is_err(o)) {
4506                                         rc = xa_err(o);
4507                                         put_page(page);
4508                                         goto err_free;
4509                                 }
4510
4511                                 xa_set_mark(buffer, j, XA_MARK_0);
4512
4513                                 seg = min_t(size_t, size - copied, PAGE_SIZE);
4514                                 if (copy_page_from_iter(page, 0, seg, &old->rq_iter) != seg) {
4515                                         rc = -EFAULT;
4516                                         goto err_free;
4517                                 }
4518                                 copied += seg;
4519                         }
4520                         iov_iter_xarray(&new->rq_iter, ITER_SOURCE,
4521                                         buffer, 0, size);
4522                         new->rq_iter_size = size;
4523                 }
4524         }
4525
4526         /* fill the 1st iov with a transform header */
4527         fill_transform_hdr(tr_hdr, orig_len, old_rq, server->cipher_type);
4528
4529         rc = crypt_message(server, num_rqst, new_rq, 1);
4530         cifs_dbg(FYI, "Encrypt message returned %d\n", rc);
4531         if (rc)
4532                 goto err_free;
4533
4534         return rc;
4535
4536 err_free:
4537         smb3_free_compound_rqst(num_rqst - 1, &new_rq[1]);
4538         return rc;
4539 }
4540
4541 static int
4542 smb3_is_transform_hdr(void *buf)
4543 {
4544         struct smb2_transform_hdr *trhdr = buf;
4545
4546         return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
4547 }
4548
4549 static int
4550 decrypt_raw_data(struct TCP_Server_Info *server, char *buf,
4551                  unsigned int buf_data_size, struct iov_iter *iter,
4552                  bool is_offloaded)
4553 {
4554         struct kvec iov[2];
4555         struct smb_rqst rqst = {NULL};
4556         size_t iter_size = 0;
4557         int rc;
4558
4559         iov[0].iov_base = buf;
4560         iov[0].iov_len = sizeof(struct smb2_transform_hdr);
4561         iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr);
4562         iov[1].iov_len = buf_data_size;
4563
4564         rqst.rq_iov = iov;
4565         rqst.rq_nvec = 2;
4566         if (iter) {
4567                 rqst.rq_iter = *iter;
4568                 rqst.rq_iter_size = iov_iter_count(iter);
4569                 iter_size = iov_iter_count(iter);
4570         }
4571
4572         rc = crypt_message(server, 1, &rqst, 0);
4573         cifs_dbg(FYI, "Decrypt message returned %d\n", rc);
4574
4575         if (rc)
4576                 return rc;
4577
4578         memmove(buf, iov[1].iov_base, buf_data_size);
4579
4580         if (!is_offloaded)
4581                 server->total_read = buf_data_size + iter_size;
4582
4583         return rc;
4584 }
4585
4586 static int
4587 cifs_copy_pages_to_iter(struct xarray *pages, unsigned int data_size,
4588                         unsigned int skip, struct iov_iter *iter)
4589 {
4590         struct page *page;
4591         unsigned long index;
4592
4593         xa_for_each(pages, index, page) {
4594                 size_t n, len = min_t(unsigned int, PAGE_SIZE - skip, data_size);
4595
4596                 n = copy_page_to_iter(page, skip, len, iter);
4597                 if (n != len) {
4598                         cifs_dbg(VFS, "%s: something went wrong\n", __func__);
4599                         return -EIO;
4600                 }
4601                 data_size -= n;
4602                 skip = 0;
4603         }
4604
4605         return 0;
4606 }
4607
4608 static int
4609 handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid,
4610                  char *buf, unsigned int buf_len, struct xarray *pages,
4611                  unsigned int pages_len, bool is_offloaded)
4612 {
4613         unsigned int data_offset;
4614         unsigned int data_len;
4615         unsigned int cur_off;
4616         unsigned int cur_page_idx;
4617         unsigned int pad_len;
4618         struct cifs_readdata *rdata = mid->callback_data;
4619         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
4620         int length;
4621         bool use_rdma_mr = false;
4622
4623         if (shdr->Command != SMB2_READ) {
4624                 cifs_server_dbg(VFS, "only big read responses are supported\n");
4625                 return -EOPNOTSUPP;
4626         }
4627
4628         if (server->ops->is_session_expired &&
4629             server->ops->is_session_expired(buf)) {
4630                 if (!is_offloaded)
4631                         cifs_reconnect(server, true);
4632                 return -1;
4633         }
4634
4635         if (server->ops->is_status_pending &&
4636                         server->ops->is_status_pending(buf, server))
4637                 return -1;
4638
4639         /* set up first two iov to get credits */
4640         rdata->iov[0].iov_base = buf;
4641         rdata->iov[0].iov_len = 0;
4642         rdata->iov[1].iov_base = buf;
4643         rdata->iov[1].iov_len =
4644                 min_t(unsigned int, buf_len, server->vals->read_rsp_size);
4645         cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n",
4646                  rdata->iov[0].iov_base, rdata->iov[0].iov_len);
4647         cifs_dbg(FYI, "1: iov_base=%p iov_len=%zu\n",
4648                  rdata->iov[1].iov_base, rdata->iov[1].iov_len);
4649
4650         rdata->result = server->ops->map_error(buf, true);
4651         if (rdata->result != 0) {
4652                 cifs_dbg(FYI, "%s: server returned error %d\n",
4653                          __func__, rdata->result);
4654                 /* normal error on read response */
4655                 if (is_offloaded)
4656                         mid->mid_state = MID_RESPONSE_RECEIVED;
4657                 else
4658                         dequeue_mid(mid, false);
4659                 return 0;
4660         }
4661
4662         data_offset = server->ops->read_data_offset(buf);
4663 #ifdef CONFIG_CIFS_SMB_DIRECT
4664         use_rdma_mr = rdata->mr;
4665 #endif
4666         data_len = server->ops->read_data_length(buf, use_rdma_mr);
4667
4668         if (data_offset < server->vals->read_rsp_size) {
4669                 /*
4670                  * win2k8 sometimes sends an offset of 0 when the read
4671                  * is beyond the EOF. Treat it as if the data starts just after
4672                  * the header.
4673                  */
4674                 cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n",
4675                          __func__, data_offset);
4676                 data_offset = server->vals->read_rsp_size;
4677         } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) {
4678                 /* data_offset is beyond the end of smallbuf */
4679                 cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n",
4680                          __func__, data_offset);
4681                 rdata->result = -EIO;
4682                 if (is_offloaded)
4683                         mid->mid_state = MID_RESPONSE_MALFORMED;
4684                 else
4685                         dequeue_mid(mid, rdata->result);
4686                 return 0;
4687         }
4688
4689         pad_len = data_offset - server->vals->read_rsp_size;
4690
4691         if (buf_len <= data_offset) {
4692                 /* read response payload is in pages */
4693                 cur_page_idx = pad_len / PAGE_SIZE;
4694                 cur_off = pad_len % PAGE_SIZE;
4695
4696                 if (cur_page_idx != 0) {
4697                         /* data offset is beyond the 1st page of response */
4698                         cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n",
4699                                  __func__, data_offset);
4700                         rdata->result = -EIO;
4701                         if (is_offloaded)
4702                                 mid->mid_state = MID_RESPONSE_MALFORMED;
4703                         else
4704                                 dequeue_mid(mid, rdata->result);
4705                         return 0;
4706                 }
4707
4708                 if (data_len > pages_len - pad_len) {
4709                         /* data_len is corrupt -- discard frame */
4710                         rdata->result = -EIO;
4711                         if (is_offloaded)
4712                                 mid->mid_state = MID_RESPONSE_MALFORMED;
4713                         else
4714                                 dequeue_mid(mid, rdata->result);
4715                         return 0;
4716                 }
4717
4718                 /* Copy the data to the output I/O iterator. */
4719                 rdata->result = cifs_copy_pages_to_iter(pages, pages_len,
4720                                                         cur_off, &rdata->iter);
4721                 if (rdata->result != 0) {
4722                         if (is_offloaded)
4723                                 mid->mid_state = MID_RESPONSE_MALFORMED;
4724                         else
4725                                 dequeue_mid(mid, rdata->result);
4726                         return 0;
4727                 }
4728                 rdata->got_bytes = pages_len;
4729
4730         } else if (buf_len >= data_offset + data_len) {
4731                 /* read response payload is in buf */
4732                 WARN_ONCE(pages && !xa_empty(pages),
4733                           "read data can be either in buf or in pages");
4734                 length = copy_to_iter(buf + data_offset, data_len, &rdata->iter);
4735                 if (length < 0)
4736                         return length;
4737                 rdata->got_bytes = data_len;
4738         } else {
4739                 /* read response payload cannot be in both buf and pages */
4740                 WARN_ONCE(1, "buf can not contain only a part of read data");
4741                 rdata->result = -EIO;
4742                 if (is_offloaded)
4743                         mid->mid_state = MID_RESPONSE_MALFORMED;
4744                 else
4745                         dequeue_mid(mid, rdata->result);
4746                 return 0;
4747         }
4748
4749         if (is_offloaded)
4750                 mid->mid_state = MID_RESPONSE_RECEIVED;
4751         else
4752                 dequeue_mid(mid, false);
4753         return 0;
4754 }
4755
4756 struct smb2_decrypt_work {
4757         struct work_struct decrypt;
4758         struct TCP_Server_Info *server;
4759         struct xarray buffer;
4760         char *buf;
4761         unsigned int len;
4762 };
4763
4764
4765 static void smb2_decrypt_offload(struct work_struct *work)
4766 {
4767         struct smb2_decrypt_work *dw = container_of(work,
4768                                 struct smb2_decrypt_work, decrypt);
4769         int rc;
4770         struct mid_q_entry *mid;
4771         struct iov_iter iter;
4772
4773         iov_iter_xarray(&iter, ITER_DEST, &dw->buffer, 0, dw->len);
4774         rc = decrypt_raw_data(dw->server, dw->buf, dw->server->vals->read_rsp_size,
4775                               &iter, true);
4776         if (rc) {
4777                 cifs_dbg(VFS, "error decrypting rc=%d\n", rc);
4778                 goto free_pages;
4779         }
4780
4781         dw->server->lstrp = jiffies;
4782         mid = smb2_find_dequeue_mid(dw->server, dw->buf);
4783         if (mid == NULL)
4784                 cifs_dbg(FYI, "mid not found\n");
4785         else {
4786                 mid->decrypted = true;
4787                 rc = handle_read_data(dw->server, mid, dw->buf,
4788                                       dw->server->vals->read_rsp_size,
4789                                       &dw->buffer, dw->len,
4790                                       true);
4791                 if (rc >= 0) {
4792 #ifdef CONFIG_CIFS_STATS2
4793                         mid->when_received = jiffies;
4794 #endif
4795                         if (dw->server->ops->is_network_name_deleted)
4796                                 dw->server->ops->is_network_name_deleted(dw->buf,
4797                                                                          dw->server);
4798
4799                         mid->callback(mid);
4800                 } else {
4801                         spin_lock(&dw->server->srv_lock);
4802                         if (dw->server->tcpStatus == CifsNeedReconnect) {
4803                                 spin_lock(&dw->server->mid_lock);
4804                                 mid->mid_state = MID_RETRY_NEEDED;
4805                                 spin_unlock(&dw->server->mid_lock);
4806                                 spin_unlock(&dw->server->srv_lock);
4807                                 mid->callback(mid);
4808                         } else {
4809                                 spin_lock(&dw->server->mid_lock);
4810                                 mid->mid_state = MID_REQUEST_SUBMITTED;
4811                                 mid->mid_flags &= ~(MID_DELETED);
4812                                 list_add_tail(&mid->qhead,
4813                                         &dw->server->pending_mid_q);
4814                                 spin_unlock(&dw->server->mid_lock);
4815                                 spin_unlock(&dw->server->srv_lock);
4816                         }
4817                 }
4818                 release_mid(mid);
4819         }
4820
4821 free_pages:
4822         cifs_clear_xarray_buffer(&dw->buffer);
4823         cifs_small_buf_release(dw->buf);
4824         kfree(dw);
4825 }
4826
4827
4828 static int
4829 receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid,
4830                        int *num_mids)
4831 {
4832         struct page *page;
4833         char *buf = server->smallbuf;
4834         struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
4835         struct iov_iter iter;
4836         unsigned int len, npages;
4837         unsigned int buflen = server->pdu_size;
4838         int rc;
4839         int i = 0;
4840         struct smb2_decrypt_work *dw;
4841
4842         dw = kzalloc(sizeof(struct smb2_decrypt_work), GFP_KERNEL);
4843         if (!dw)
4844                 return -ENOMEM;
4845         xa_init(&dw->buffer);
4846         INIT_WORK(&dw->decrypt, smb2_decrypt_offload);
4847         dw->server = server;
4848
4849         *num_mids = 1;
4850         len = min_t(unsigned int, buflen, server->vals->read_rsp_size +
4851                 sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1;
4852
4853         rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len);
4854         if (rc < 0)
4855                 goto free_dw;
4856         server->total_read += rc;
4857
4858         len = le32_to_cpu(tr_hdr->OriginalMessageSize) -
4859                 server->vals->read_rsp_size;
4860         dw->len = len;
4861         npages = DIV_ROUND_UP(len, PAGE_SIZE);
4862
4863         rc = -ENOMEM;
4864         for (; i < npages; i++) {
4865                 void *old;
4866
4867                 page = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
4868                 if (!page)
4869                         goto discard_data;
4870                 page->index = i;
4871                 old = xa_store(&dw->buffer, i, page, GFP_KERNEL);
4872                 if (xa_is_err(old)) {
4873                         rc = xa_err(old);
4874                         put_page(page);
4875                         goto discard_data;
4876                 }
4877                 xa_set_mark(&dw->buffer, i, XA_MARK_0);
4878         }
4879
4880         iov_iter_xarray(&iter, ITER_DEST, &dw->buffer, 0, npages * PAGE_SIZE);
4881
4882         /* Read the data into the buffer and clear excess bufferage. */
4883         rc = cifs_read_iter_from_socket(server, &iter, dw->len);
4884         if (rc < 0)
4885                 goto discard_data;
4886
4887         server->total_read += rc;
4888         if (rc < npages * PAGE_SIZE)
4889                 iov_iter_zero(npages * PAGE_SIZE - rc, &iter);
4890         iov_iter_revert(&iter, npages * PAGE_SIZE);
4891         iov_iter_truncate(&iter, dw->len);
4892
4893         rc = cifs_discard_remaining_data(server);
4894         if (rc)
4895                 goto free_pages;
4896
4897         /*
4898          * For large reads, offload to different thread for better performance,
4899          * use more cores decrypting which can be expensive
4900          */
4901
4902         if ((server->min_offload) && (server->in_flight > 1) &&
4903             (server->pdu_size >= server->min_offload)) {
4904                 dw->buf = server->smallbuf;
4905                 server->smallbuf = (char *)cifs_small_buf_get();
4906
4907                 queue_work(decrypt_wq, &dw->decrypt);
4908                 *num_mids = 0; /* worker thread takes care of finding mid */
4909                 return -1;
4910         }
4911
4912         rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size,
4913                               &iter, false);
4914         if (rc)
4915                 goto free_pages;
4916
4917         *mid = smb2_find_mid(server, buf);
4918         if (*mid == NULL) {
4919                 cifs_dbg(FYI, "mid not found\n");
4920         } else {
4921                 cifs_dbg(FYI, "mid found\n");
4922                 (*mid)->decrypted = true;
4923                 rc = handle_read_data(server, *mid, buf,
4924                                       server->vals->read_rsp_size,
4925                                       &dw->buffer, dw->len, false);
4926                 if (rc >= 0) {
4927                         if (server->ops->is_network_name_deleted) {
4928                                 server->ops->is_network_name_deleted(buf,
4929                                                                 server);
4930                         }
4931                 }
4932         }
4933
4934 free_pages:
4935         cifs_clear_xarray_buffer(&dw->buffer);
4936 free_dw:
4937         kfree(dw);
4938         return rc;
4939 discard_data:
4940         cifs_discard_remaining_data(server);
4941         goto free_pages;
4942 }
4943
4944 static int
4945 receive_encrypted_standard(struct TCP_Server_Info *server,
4946                            struct mid_q_entry **mids, char **bufs,
4947                            int *num_mids)
4948 {
4949         int ret, length;
4950         char *buf = server->smallbuf;
4951         struct smb2_hdr *shdr;
4952         unsigned int pdu_length = server->pdu_size;
4953         unsigned int buf_size;
4954         unsigned int next_cmd;
4955         struct mid_q_entry *mid_entry;
4956         int next_is_large;
4957         char *next_buffer = NULL;
4958
4959         *num_mids = 0;
4960
4961         /* switch to large buffer if too big for a small one */
4962         if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE) {
4963                 server->large_buf = true;
4964                 memcpy(server->bigbuf, buf, server->total_read);
4965                 buf = server->bigbuf;
4966         }
4967
4968         /* now read the rest */
4969         length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
4970                                 pdu_length - HEADER_SIZE(server) + 1);
4971         if (length < 0)
4972                 return length;
4973         server->total_read += length;
4974
4975         buf_size = pdu_length - sizeof(struct smb2_transform_hdr);
4976         length = decrypt_raw_data(server, buf, buf_size, NULL, false);
4977         if (length)
4978                 return length;
4979
4980         next_is_large = server->large_buf;
4981 one_more:
4982         shdr = (struct smb2_hdr *)buf;
4983         next_cmd = le32_to_cpu(shdr->NextCommand);
4984         if (next_cmd) {
4985                 if (WARN_ON_ONCE(next_cmd > pdu_length))
4986                         return -1;
4987                 if (next_is_large)
4988                         next_buffer = (char *)cifs_buf_get();
4989                 else
4990                         next_buffer = (char *)cifs_small_buf_get();
4991                 memcpy(next_buffer, buf + next_cmd, pdu_length - next_cmd);
4992         }
4993
4994         mid_entry = smb2_find_mid(server, buf);
4995         if (mid_entry == NULL)
4996                 cifs_dbg(FYI, "mid not found\n");
4997         else {
4998                 cifs_dbg(FYI, "mid found\n");
4999                 mid_entry->decrypted = true;
5000                 mid_entry->resp_buf_size = server->pdu_size;
5001         }
5002
5003         if (*num_mids >= MAX_COMPOUND) {
5004                 cifs_server_dbg(VFS, "too many PDUs in compound\n");
5005                 return -1;
5006         }
5007         bufs[*num_mids] = buf;
5008         mids[(*num_mids)++] = mid_entry;
5009
5010         if (mid_entry && mid_entry->handle)
5011                 ret = mid_entry->handle(server, mid_entry);
5012         else
5013                 ret = cifs_handle_standard(server, mid_entry);
5014
5015         if (ret == 0 && next_cmd) {
5016                 pdu_length -= next_cmd;
5017                 server->large_buf = next_is_large;
5018                 if (next_is_large)
5019                         server->bigbuf = buf = next_buffer;
5020                 else
5021                         server->smallbuf = buf = next_buffer;
5022                 goto one_more;
5023         } else if (ret != 0) {
5024                 /*
5025                  * ret != 0 here means that we didn't get to handle_mid() thus
5026                  * server->smallbuf and server->bigbuf are still valid. We need
5027                  * to free next_buffer because it is not going to be used
5028                  * anywhere.
5029                  */
5030                 if (next_is_large)
5031                         free_rsp_buf(CIFS_LARGE_BUFFER, next_buffer);
5032                 else
5033                         free_rsp_buf(CIFS_SMALL_BUFFER, next_buffer);
5034         }
5035
5036         return ret;
5037 }
5038
5039 static int
5040 smb3_receive_transform(struct TCP_Server_Info *server,
5041                        struct mid_q_entry **mids, char **bufs, int *num_mids)
5042 {
5043         char *buf = server->smallbuf;
5044         unsigned int pdu_length = server->pdu_size;
5045         struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
5046         unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
5047
5048         if (pdu_length < sizeof(struct smb2_transform_hdr) +
5049                                                 sizeof(struct smb2_hdr)) {
5050                 cifs_server_dbg(VFS, "Transform message is too small (%u)\n",
5051                          pdu_length);
5052                 cifs_reconnect(server, true);
5053                 return -ECONNABORTED;
5054         }
5055
5056         if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) {
5057                 cifs_server_dbg(VFS, "Transform message is broken\n");
5058                 cifs_reconnect(server, true);
5059                 return -ECONNABORTED;
5060         }
5061
5062         /* TODO: add support for compounds containing READ. */
5063         if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server)) {
5064                 return receive_encrypted_read(server, &mids[0], num_mids);
5065         }
5066
5067         return receive_encrypted_standard(server, mids, bufs, num_mids);
5068 }
5069
5070 int
5071 smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid)
5072 {
5073         char *buf = server->large_buf ? server->bigbuf : server->smallbuf;
5074
5075         return handle_read_data(server, mid, buf, server->pdu_size,
5076                                 NULL, 0, false);
5077 }
5078
5079 static int smb2_next_header(struct TCP_Server_Info *server, char *buf,
5080                             unsigned int *noff)
5081 {
5082         struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
5083         struct smb2_transform_hdr *t_hdr = (struct smb2_transform_hdr *)buf;
5084
5085         if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {
5086                 *noff = le32_to_cpu(t_hdr->OriginalMessageSize);
5087                 if (unlikely(check_add_overflow(*noff, sizeof(*t_hdr), noff)))
5088                         return -EINVAL;
5089         } else {
5090                 *noff = le32_to_cpu(hdr->NextCommand);
5091         }
5092         if (unlikely(*noff && *noff < MID_HEADER_SIZE(server)))
5093                 return -EINVAL;
5094         return 0;
5095 }
5096
5097 int cifs_sfu_make_node(unsigned int xid, struct inode *inode,
5098                        struct dentry *dentry, struct cifs_tcon *tcon,
5099                        const char *full_path, umode_t mode, dev_t dev)
5100 {
5101         struct cifs_open_info_data buf = {};
5102         struct TCP_Server_Info *server = tcon->ses->server;
5103         struct cifs_open_parms oparms;
5104         struct cifs_io_parms io_parms = {};
5105         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
5106         struct cifs_fid fid;
5107         unsigned int bytes_written;
5108         struct win_dev *pdev;
5109         struct kvec iov[2];
5110         __u32 oplock = server->oplocks ? REQ_OPLOCK : 0;
5111         int rc;
5112
5113         if (!S_ISCHR(mode) && !S_ISBLK(mode) && !S_ISFIFO(mode))
5114                 return -EPERM;
5115
5116         oparms = (struct cifs_open_parms) {
5117                 .tcon = tcon,
5118                 .cifs_sb = cifs_sb,
5119                 .desired_access = GENERIC_WRITE,
5120                 .create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR |
5121                                                       CREATE_OPTION_SPECIAL),
5122                 .disposition = FILE_CREATE,
5123                 .path = full_path,
5124                 .fid = &fid,
5125         };
5126
5127         rc = server->ops->open(xid, &oparms, &oplock, &buf);
5128         if (rc)
5129                 return rc;
5130
5131         /*
5132          * BB Do not bother to decode buf since no local inode yet to put
5133          * timestamps in, but we can reuse it safely.
5134          */
5135         pdev = (struct win_dev *)&buf.fi;
5136         io_parms.pid = current->tgid;
5137         io_parms.tcon = tcon;
5138         io_parms.length = sizeof(*pdev);
5139         iov[1].iov_base = pdev;
5140         iov[1].iov_len = sizeof(*pdev);
5141         if (S_ISCHR(mode)) {
5142                 memcpy(pdev->type, "IntxCHR", 8);
5143                 pdev->major = cpu_to_le64(MAJOR(dev));
5144                 pdev->minor = cpu_to_le64(MINOR(dev));
5145         } else if (S_ISBLK(mode)) {
5146                 memcpy(pdev->type, "IntxBLK", 8);
5147                 pdev->major = cpu_to_le64(MAJOR(dev));
5148                 pdev->minor = cpu_to_le64(MINOR(dev));
5149         } else if (S_ISFIFO(mode)) {
5150                 memcpy(pdev->type, "LnxFIFO", 8);
5151         }
5152
5153         rc = server->ops->sync_write(xid, &fid, &io_parms,
5154                                      &bytes_written, iov, 1);
5155         server->ops->close(xid, tcon, &fid);
5156         d_drop(dentry);
5157         /* FIXME: add code here to set EAs */
5158         cifs_free_open_info(&buf);
5159         return rc;
5160 }
5161
5162 static int smb2_make_node(unsigned int xid, struct inode *inode,
5163                           struct dentry *dentry, struct cifs_tcon *tcon,
5164                           const char *full_path, umode_t mode, dev_t dev)
5165 {
5166         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
5167
5168         /*
5169          * Check if mounted with mount parm 'sfu' mount parm.
5170          * SFU emulation should work with all servers, but only
5171          * supports block and char device (no socket & fifo),
5172          * and was used by default in earlier versions of Windows
5173          */
5174         if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL))
5175                 return -EPERM;
5176         /*
5177          * TODO: Add ability to create instead via reparse point. Windows (e.g.
5178          * their current NFS server) uses this approach to expose special files
5179          * over SMB2/SMB3 and Samba will do this with SMB3.1.1 POSIX Extensions
5180          */
5181         return cifs_sfu_make_node(xid, inode, dentry, tcon,
5182                                   full_path, mode, dev);
5183 }
5184
5185 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
5186 struct smb_version_operations smb20_operations = {
5187         .compare_fids = smb2_compare_fids,
5188         .setup_request = smb2_setup_request,
5189         .setup_async_request = smb2_setup_async_request,
5190         .check_receive = smb2_check_receive,
5191         .add_credits = smb2_add_credits,
5192         .set_credits = smb2_set_credits,
5193         .get_credits_field = smb2_get_credits_field,
5194         .get_credits = smb2_get_credits,
5195         .wait_mtu_credits = cifs_wait_mtu_credits,
5196         .get_next_mid = smb2_get_next_mid,
5197         .revert_current_mid = smb2_revert_current_mid,
5198         .read_data_offset = smb2_read_data_offset,
5199         .read_data_length = smb2_read_data_length,
5200         .map_error = map_smb2_to_linux_error,
5201         .find_mid = smb2_find_mid,
5202         .check_message = smb2_check_message,
5203         .dump_detail = smb2_dump_detail,
5204         .clear_stats = smb2_clear_stats,
5205         .print_stats = smb2_print_stats,
5206         .is_oplock_break = smb2_is_valid_oplock_break,
5207         .handle_cancelled_mid = smb2_handle_cancelled_mid,
5208         .downgrade_oplock = smb2_downgrade_oplock,
5209         .need_neg = smb2_need_neg,
5210         .negotiate = smb2_negotiate,
5211         .negotiate_wsize = smb2_negotiate_wsize,
5212         .negotiate_rsize = smb2_negotiate_rsize,
5213         .sess_setup = SMB2_sess_setup,
5214         .logoff = SMB2_logoff,
5215         .tree_connect = SMB2_tcon,
5216         .tree_disconnect = SMB2_tdis,
5217         .qfs_tcon = smb2_qfs_tcon,
5218         .is_path_accessible = smb2_is_path_accessible,
5219         .can_echo = smb2_can_echo,
5220         .echo = SMB2_echo,
5221         .query_path_info = smb2_query_path_info,
5222         .query_reparse_point = smb2_query_reparse_point,
5223         .get_srv_inum = smb2_get_srv_inum,
5224         .query_file_info = smb2_query_file_info,
5225         .set_path_size = smb2_set_path_size,
5226         .set_file_size = smb2_set_file_size,
5227         .set_file_info = smb2_set_file_info,
5228         .set_compression = smb2_set_compression,
5229         .mkdir = smb2_mkdir,
5230         .mkdir_setinfo = smb2_mkdir_setinfo,
5231         .rmdir = smb2_rmdir,
5232         .unlink = smb2_unlink,
5233         .rename = smb2_rename_path,
5234         .create_hardlink = smb2_create_hardlink,
5235         .parse_reparse_point = smb2_parse_reparse_point,
5236         .query_mf_symlink = smb3_query_mf_symlink,
5237         .create_mf_symlink = smb3_create_mf_symlink,
5238         .open = smb2_open_file,
5239         .set_fid = smb2_set_fid,
5240         .close = smb2_close_file,
5241         .flush = smb2_flush_file,
5242         .async_readv = smb2_async_readv,
5243         .async_writev = smb2_async_writev,
5244         .sync_read = smb2_sync_read,
5245         .sync_write = smb2_sync_write,
5246         .query_dir_first = smb2_query_dir_first,
5247         .query_dir_next = smb2_query_dir_next,
5248         .close_dir = smb2_close_dir,
5249         .calc_smb_size = smb2_calc_size,
5250         .is_status_pending = smb2_is_status_pending,
5251         .is_session_expired = smb2_is_session_expired,
5252         .oplock_response = smb2_oplock_response,
5253         .queryfs = smb2_queryfs,
5254         .mand_lock = smb2_mand_lock,
5255         .mand_unlock_range = smb2_unlock_range,
5256         .push_mand_locks = smb2_push_mandatory_locks,
5257         .get_lease_key = smb2_get_lease_key,
5258         .set_lease_key = smb2_set_lease_key,
5259         .new_lease_key = smb2_new_lease_key,
5260         .calc_signature = smb2_calc_signature,
5261         .is_read_op = smb2_is_read_op,
5262         .set_oplock_level = smb2_set_oplock_level,
5263         .create_lease_buf = smb2_create_lease_buf,
5264         .parse_lease_buf = smb2_parse_lease_buf,
5265         .copychunk_range = smb2_copychunk_range,
5266         .wp_retry_size = smb2_wp_retry_size,
5267         .dir_needs_close = smb2_dir_needs_close,
5268         .get_dfs_refer = smb2_get_dfs_refer,
5269         .select_sectype = smb2_select_sectype,
5270 #ifdef CONFIG_CIFS_XATTR
5271         .query_all_EAs = smb2_query_eas,
5272         .set_EA = smb2_set_ea,
5273 #endif /* CIFS_XATTR */
5274         .get_acl = get_smb2_acl,
5275         .get_acl_by_fid = get_smb2_acl_by_fid,
5276         .set_acl = set_smb2_acl,
5277         .next_header = smb2_next_header,
5278         .ioctl_query_info = smb2_ioctl_query_info,
5279         .make_node = smb2_make_node,
5280         .fiemap = smb3_fiemap,
5281         .llseek = smb3_llseek,
5282         .is_status_io_timeout = smb2_is_status_io_timeout,
5283         .is_network_name_deleted = smb2_is_network_name_deleted,
5284 };
5285 #endif /* CIFS_ALLOW_INSECURE_LEGACY */
5286
5287 struct smb_version_operations smb21_operations = {
5288         .compare_fids = smb2_compare_fids,
5289         .setup_request = smb2_setup_request,
5290         .setup_async_request = smb2_setup_async_request,
5291         .check_receive = smb2_check_receive,
5292         .add_credits = smb2_add_credits,
5293         .set_credits = smb2_set_credits,
5294         .get_credits_field = smb2_get_credits_field,
5295         .get_credits = smb2_get_credits,
5296         .wait_mtu_credits = smb2_wait_mtu_credits,
5297         .adjust_credits = smb2_adjust_credits,
5298         .get_next_mid = smb2_get_next_mid,
5299         .revert_current_mid = smb2_revert_current_mid,
5300         .read_data_offset = smb2_read_data_offset,
5301         .read_data_length = smb2_read_data_length,
5302         .map_error = map_smb2_to_linux_error,
5303         .find_mid = smb2_find_mid,
5304         .check_message = smb2_check_message,
5305         .dump_detail = smb2_dump_detail,
5306         .clear_stats = smb2_clear_stats,
5307         .print_stats = smb2_print_stats,
5308         .is_oplock_break = smb2_is_valid_oplock_break,
5309         .handle_cancelled_mid = smb2_handle_cancelled_mid,
5310         .downgrade_oplock = smb2_downgrade_oplock,
5311         .need_neg = smb2_need_neg,
5312         .negotiate = smb2_negotiate,
5313         .negotiate_wsize = smb2_negotiate_wsize,
5314         .negotiate_rsize = smb2_negotiate_rsize,
5315         .sess_setup = SMB2_sess_setup,
5316         .logoff = SMB2_logoff,
5317         .tree_connect = SMB2_tcon,
5318         .tree_disconnect = SMB2_tdis,
5319         .qfs_tcon = smb2_qfs_tcon,
5320         .is_path_accessible = smb2_is_path_accessible,
5321         .can_echo = smb2_can_echo,
5322         .echo = SMB2_echo,
5323         .query_path_info = smb2_query_path_info,
5324         .query_reparse_point = smb2_query_reparse_point,
5325         .get_srv_inum = smb2_get_srv_inum,
5326         .query_file_info = smb2_query_file_info,
5327         .set_path_size = smb2_set_path_size,
5328         .set_file_size = smb2_set_file_size,
5329         .set_file_info = smb2_set_file_info,
5330         .set_compression = smb2_set_compression,
5331         .mkdir = smb2_mkdir,
5332         .mkdir_setinfo = smb2_mkdir_setinfo,
5333         .rmdir = smb2_rmdir,
5334         .unlink = smb2_unlink,
5335         .rename = smb2_rename_path,
5336         .create_hardlink = smb2_create_hardlink,
5337         .parse_reparse_point = smb2_parse_reparse_point,
5338         .query_mf_symlink = smb3_query_mf_symlink,
5339         .create_mf_symlink = smb3_create_mf_symlink,
5340         .open = smb2_open_file,
5341         .set_fid = smb2_set_fid,
5342         .close = smb2_close_file,
5343         .flush = smb2_flush_file,
5344         .async_readv = smb2_async_readv,
5345         .async_writev = smb2_async_writev,
5346         .sync_read = smb2_sync_read,
5347         .sync_write = smb2_sync_write,
5348         .query_dir_first = smb2_query_dir_first,
5349         .query_dir_next = smb2_query_dir_next,
5350         .close_dir = smb2_close_dir,
5351         .calc_smb_size = smb2_calc_size,
5352         .is_status_pending = smb2_is_status_pending,
5353         .is_session_expired = smb2_is_session_expired,
5354         .oplock_response = smb2_oplock_response,
5355         .queryfs = smb2_queryfs,
5356         .mand_lock = smb2_mand_lock,
5357         .mand_unlock_range = smb2_unlock_range,
5358         .push_mand_locks = smb2_push_mandatory_locks,
5359         .get_lease_key = smb2_get_lease_key,
5360         .set_lease_key = smb2_set_lease_key,
5361         .new_lease_key = smb2_new_lease_key,
5362         .calc_signature = smb2_calc_signature,
5363         .is_read_op = smb21_is_read_op,
5364         .set_oplock_level = smb21_set_oplock_level,
5365         .create_lease_buf = smb2_create_lease_buf,
5366         .parse_lease_buf = smb2_parse_lease_buf,
5367         .copychunk_range = smb2_copychunk_range,
5368         .wp_retry_size = smb2_wp_retry_size,
5369         .dir_needs_close = smb2_dir_needs_close,
5370         .enum_snapshots = smb3_enum_snapshots,
5371         .notify = smb3_notify,
5372         .get_dfs_refer = smb2_get_dfs_refer,
5373         .select_sectype = smb2_select_sectype,
5374 #ifdef CONFIG_CIFS_XATTR
5375         .query_all_EAs = smb2_query_eas,
5376         .set_EA = smb2_set_ea,
5377 #endif /* CIFS_XATTR */
5378         .get_acl = get_smb2_acl,
5379         .get_acl_by_fid = get_smb2_acl_by_fid,
5380         .set_acl = set_smb2_acl,
5381         .next_header = smb2_next_header,
5382         .ioctl_query_info = smb2_ioctl_query_info,
5383         .make_node = smb2_make_node,
5384         .fiemap = smb3_fiemap,
5385         .llseek = smb3_llseek,
5386         .is_status_io_timeout = smb2_is_status_io_timeout,
5387         .is_network_name_deleted = smb2_is_network_name_deleted,
5388 };
5389
5390 struct smb_version_operations smb30_operations = {
5391         .compare_fids = smb2_compare_fids,
5392         .setup_request = smb2_setup_request,
5393         .setup_async_request = smb2_setup_async_request,
5394         .check_receive = smb2_check_receive,
5395         .add_credits = smb2_add_credits,
5396         .set_credits = smb2_set_credits,
5397         .get_credits_field = smb2_get_credits_field,
5398         .get_credits = smb2_get_credits,
5399         .wait_mtu_credits = smb2_wait_mtu_credits,
5400         .adjust_credits = smb2_adjust_credits,
5401         .get_next_mid = smb2_get_next_mid,
5402         .revert_current_mid = smb2_revert_current_mid,
5403         .read_data_offset = smb2_read_data_offset,
5404         .read_data_length = smb2_read_data_length,
5405         .map_error = map_smb2_to_linux_error,
5406         .find_mid = smb2_find_mid,
5407         .check_message = smb2_check_message,
5408         .dump_detail = smb2_dump_detail,
5409         .clear_stats = smb2_clear_stats,
5410         .print_stats = smb2_print_stats,
5411         .dump_share_caps = smb2_dump_share_caps,
5412         .is_oplock_break = smb2_is_valid_oplock_break,
5413         .handle_cancelled_mid = smb2_handle_cancelled_mid,
5414         .downgrade_oplock = smb3_downgrade_oplock,
5415         .need_neg = smb2_need_neg,
5416         .negotiate = smb2_negotiate,
5417         .negotiate_wsize = smb3_negotiate_wsize,
5418         .negotiate_rsize = smb3_negotiate_rsize,
5419         .sess_setup = SMB2_sess_setup,
5420         .logoff = SMB2_logoff,
5421         .tree_connect = SMB2_tcon,
5422         .tree_disconnect = SMB2_tdis,
5423         .qfs_tcon = smb3_qfs_tcon,
5424         .is_path_accessible = smb2_is_path_accessible,
5425         .can_echo = smb2_can_echo,
5426         .echo = SMB2_echo,
5427         .query_path_info = smb2_query_path_info,
5428         /* WSL tags introduced long after smb2.1, enable for SMB3, 3.11 only */
5429         .query_reparse_point = smb2_query_reparse_point,
5430         .get_srv_inum = smb2_get_srv_inum,
5431         .query_file_info = smb2_query_file_info,
5432         .set_path_size = smb2_set_path_size,
5433         .set_file_size = smb2_set_file_size,
5434         .set_file_info = smb2_set_file_info,
5435         .set_compression = smb2_set_compression,
5436         .mkdir = smb2_mkdir,
5437         .mkdir_setinfo = smb2_mkdir_setinfo,
5438         .rmdir = smb2_rmdir,
5439         .unlink = smb2_unlink,
5440         .rename = smb2_rename_path,
5441         .create_hardlink = smb2_create_hardlink,
5442         .parse_reparse_point = smb2_parse_reparse_point,
5443         .query_mf_symlink = smb3_query_mf_symlink,
5444         .create_mf_symlink = smb3_create_mf_symlink,
5445         .open = smb2_open_file,
5446         .set_fid = smb2_set_fid,
5447         .close = smb2_close_file,
5448         .close_getattr = smb2_close_getattr,
5449         .flush = smb2_flush_file,
5450         .async_readv = smb2_async_readv,
5451         .async_writev = smb2_async_writev,
5452         .sync_read = smb2_sync_read,
5453         .sync_write = smb2_sync_write,
5454         .query_dir_first = smb2_query_dir_first,
5455         .query_dir_next = smb2_query_dir_next,
5456         .close_dir = smb2_close_dir,
5457         .calc_smb_size = smb2_calc_size,
5458         .is_status_pending = smb2_is_status_pending,
5459         .is_session_expired = smb2_is_session_expired,
5460         .oplock_response = smb2_oplock_response,
5461         .queryfs = smb2_queryfs,
5462         .mand_lock = smb2_mand_lock,
5463         .mand_unlock_range = smb2_unlock_range,
5464         .push_mand_locks = smb2_push_mandatory_locks,
5465         .get_lease_key = smb2_get_lease_key,
5466         .set_lease_key = smb2_set_lease_key,
5467         .new_lease_key = smb2_new_lease_key,
5468         .generate_signingkey = generate_smb30signingkey,
5469         .calc_signature = smb3_calc_signature,
5470         .set_integrity  = smb3_set_integrity,
5471         .is_read_op = smb21_is_read_op,
5472         .set_oplock_level = smb3_set_oplock_level,
5473         .create_lease_buf = smb3_create_lease_buf,
5474         .parse_lease_buf = smb3_parse_lease_buf,
5475         .copychunk_range = smb2_copychunk_range,
5476         .duplicate_extents = smb2_duplicate_extents,
5477         .validate_negotiate = smb3_validate_negotiate,
5478         .wp_retry_size = smb2_wp_retry_size,
5479         .dir_needs_close = smb2_dir_needs_close,
5480         .fallocate = smb3_fallocate,
5481         .enum_snapshots = smb3_enum_snapshots,
5482         .notify = smb3_notify,
5483         .init_transform_rq = smb3_init_transform_rq,
5484         .is_transform_hdr = smb3_is_transform_hdr,
5485         .receive_transform = smb3_receive_transform,
5486         .get_dfs_refer = smb2_get_dfs_refer,
5487         .select_sectype = smb2_select_sectype,
5488 #ifdef CONFIG_CIFS_XATTR
5489         .query_all_EAs = smb2_query_eas,
5490         .set_EA = smb2_set_ea,
5491 #endif /* CIFS_XATTR */
5492         .get_acl = get_smb2_acl,
5493         .get_acl_by_fid = get_smb2_acl_by_fid,
5494         .set_acl = set_smb2_acl,
5495         .next_header = smb2_next_header,
5496         .ioctl_query_info = smb2_ioctl_query_info,
5497         .make_node = smb2_make_node,
5498         .fiemap = smb3_fiemap,
5499         .llseek = smb3_llseek,
5500         .is_status_io_timeout = smb2_is_status_io_timeout,
5501         .is_network_name_deleted = smb2_is_network_name_deleted,
5502 };
5503
5504 struct smb_version_operations smb311_operations = {
5505         .compare_fids = smb2_compare_fids,
5506         .setup_request = smb2_setup_request,
5507         .setup_async_request = smb2_setup_async_request,
5508         .check_receive = smb2_check_receive,
5509         .add_credits = smb2_add_credits,
5510         .set_credits = smb2_set_credits,
5511         .get_credits_field = smb2_get_credits_field,
5512         .get_credits = smb2_get_credits,
5513         .wait_mtu_credits = smb2_wait_mtu_credits,
5514         .adjust_credits = smb2_adjust_credits,
5515         .get_next_mid = smb2_get_next_mid,
5516         .revert_current_mid = smb2_revert_current_mid,
5517         .read_data_offset = smb2_read_data_offset,
5518         .read_data_length = smb2_read_data_length,
5519         .map_error = map_smb2_to_linux_error,
5520         .find_mid = smb2_find_mid,
5521         .check_message = smb2_check_message,
5522         .dump_detail = smb2_dump_detail,
5523         .clear_stats = smb2_clear_stats,
5524         .print_stats = smb2_print_stats,
5525         .dump_share_caps = smb2_dump_share_caps,
5526         .is_oplock_break = smb2_is_valid_oplock_break,
5527         .handle_cancelled_mid = smb2_handle_cancelled_mid,
5528         .downgrade_oplock = smb3_downgrade_oplock,
5529         .need_neg = smb2_need_neg,
5530         .negotiate = smb2_negotiate,
5531         .negotiate_wsize = smb3_negotiate_wsize,
5532         .negotiate_rsize = smb3_negotiate_rsize,
5533         .sess_setup = SMB2_sess_setup,
5534         .logoff = SMB2_logoff,
5535         .tree_connect = SMB2_tcon,
5536         .tree_disconnect = SMB2_tdis,
5537         .qfs_tcon = smb3_qfs_tcon,
5538         .is_path_accessible = smb2_is_path_accessible,
5539         .can_echo = smb2_can_echo,
5540         .echo = SMB2_echo,
5541         .query_path_info = smb2_query_path_info,
5542         .query_reparse_point = smb2_query_reparse_point,
5543         .get_srv_inum = smb2_get_srv_inum,
5544         .query_file_info = smb2_query_file_info,
5545         .set_path_size = smb2_set_path_size,
5546         .set_file_size = smb2_set_file_size,
5547         .set_file_info = smb2_set_file_info,
5548         .set_compression = smb2_set_compression,
5549         .mkdir = smb2_mkdir,
5550         .mkdir_setinfo = smb2_mkdir_setinfo,
5551         .posix_mkdir = smb311_posix_mkdir,
5552         .rmdir = smb2_rmdir,
5553         .unlink = smb2_unlink,
5554         .rename = smb2_rename_path,
5555         .create_hardlink = smb2_create_hardlink,
5556         .parse_reparse_point = smb2_parse_reparse_point,
5557         .query_mf_symlink = smb3_query_mf_symlink,
5558         .create_mf_symlink = smb3_create_mf_symlink,
5559         .open = smb2_open_file,
5560         .set_fid = smb2_set_fid,
5561         .close = smb2_close_file,
5562         .close_getattr = smb2_close_getattr,
5563         .flush = smb2_flush_file,
5564         .async_readv = smb2_async_readv,
5565         .async_writev = smb2_async_writev,
5566         .sync_read = smb2_sync_read,
5567         .sync_write = smb2_sync_write,
5568         .query_dir_first = smb2_query_dir_first,
5569         .query_dir_next = smb2_query_dir_next,
5570         .close_dir = smb2_close_dir,
5571         .calc_smb_size = smb2_calc_size,
5572         .is_status_pending = smb2_is_status_pending,
5573         .is_session_expired = smb2_is_session_expired,
5574         .oplock_response = smb2_oplock_response,
5575         .queryfs = smb311_queryfs,
5576         .mand_lock = smb2_mand_lock,
5577         .mand_unlock_range = smb2_unlock_range,
5578         .push_mand_locks = smb2_push_mandatory_locks,
5579         .get_lease_key = smb2_get_lease_key,
5580         .set_lease_key = smb2_set_lease_key,
5581         .new_lease_key = smb2_new_lease_key,
5582         .generate_signingkey = generate_smb311signingkey,
5583         .calc_signature = smb3_calc_signature,
5584         .set_integrity  = smb3_set_integrity,
5585         .is_read_op = smb21_is_read_op,
5586         .set_oplock_level = smb3_set_oplock_level,
5587         .create_lease_buf = smb3_create_lease_buf,
5588         .parse_lease_buf = smb3_parse_lease_buf,
5589         .copychunk_range = smb2_copychunk_range,
5590         .duplicate_extents = smb2_duplicate_extents,
5591 /*      .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
5592         .wp_retry_size = smb2_wp_retry_size,
5593         .dir_needs_close = smb2_dir_needs_close,
5594         .fallocate = smb3_fallocate,
5595         .enum_snapshots = smb3_enum_snapshots,
5596         .notify = smb3_notify,
5597         .init_transform_rq = smb3_init_transform_rq,
5598         .is_transform_hdr = smb3_is_transform_hdr,
5599         .receive_transform = smb3_receive_transform,
5600         .get_dfs_refer = smb2_get_dfs_refer,
5601         .select_sectype = smb2_select_sectype,
5602 #ifdef CONFIG_CIFS_XATTR
5603         .query_all_EAs = smb2_query_eas,
5604         .set_EA = smb2_set_ea,
5605 #endif /* CIFS_XATTR */
5606         .get_acl = get_smb2_acl,
5607         .get_acl_by_fid = get_smb2_acl_by_fid,
5608         .set_acl = set_smb2_acl,
5609         .next_header = smb2_next_header,
5610         .ioctl_query_info = smb2_ioctl_query_info,
5611         .make_node = smb2_make_node,
5612         .fiemap = smb3_fiemap,
5613         .llseek = smb3_llseek,
5614         .is_status_io_timeout = smb2_is_status_io_timeout,
5615         .is_network_name_deleted = smb2_is_network_name_deleted,
5616 };
5617
5618 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
5619 struct smb_version_values smb20_values = {
5620         .version_string = SMB20_VERSION_STRING,
5621         .protocol_id = SMB20_PROT_ID,
5622         .req_capabilities = 0, /* MBZ */
5623         .large_lock_type = 0,
5624         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5625         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5626         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5627         .header_size = sizeof(struct smb2_hdr),
5628         .header_preamble_size = 0,
5629         .max_header_size = MAX_SMB2_HDR_SIZE,
5630         .read_rsp_size = sizeof(struct smb2_read_rsp),
5631         .lock_cmd = SMB2_LOCK,
5632         .cap_unix = 0,
5633         .cap_nt_find = SMB2_NT_FIND,
5634         .cap_large_files = SMB2_LARGE_FILES,
5635         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5636         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5637         .create_lease_size = sizeof(struct create_lease),
5638 };
5639 #endif /* ALLOW_INSECURE_LEGACY */
5640
5641 struct smb_version_values smb21_values = {
5642         .version_string = SMB21_VERSION_STRING,
5643         .protocol_id = SMB21_PROT_ID,
5644         .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
5645         .large_lock_type = 0,
5646         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5647         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5648         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5649         .header_size = sizeof(struct smb2_hdr),
5650         .header_preamble_size = 0,
5651         .max_header_size = MAX_SMB2_HDR_SIZE,
5652         .read_rsp_size = sizeof(struct smb2_read_rsp),
5653         .lock_cmd = SMB2_LOCK,
5654         .cap_unix = 0,
5655         .cap_nt_find = SMB2_NT_FIND,
5656         .cap_large_files = SMB2_LARGE_FILES,
5657         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5658         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5659         .create_lease_size = sizeof(struct create_lease),
5660 };
5661
5662 struct smb_version_values smb3any_values = {
5663         .version_string = SMB3ANY_VERSION_STRING,
5664         .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
5665         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
5666         .large_lock_type = 0,
5667         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5668         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5669         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5670         .header_size = sizeof(struct smb2_hdr),
5671         .header_preamble_size = 0,
5672         .max_header_size = MAX_SMB2_HDR_SIZE,
5673         .read_rsp_size = sizeof(struct smb2_read_rsp),
5674         .lock_cmd = SMB2_LOCK,
5675         .cap_unix = 0,
5676         .cap_nt_find = SMB2_NT_FIND,
5677         .cap_large_files = SMB2_LARGE_FILES,
5678         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5679         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5680         .create_lease_size = sizeof(struct create_lease_v2),
5681 };
5682
5683 struct smb_version_values smbdefault_values = {
5684         .version_string = SMBDEFAULT_VERSION_STRING,
5685         .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
5686         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
5687         .large_lock_type = 0,
5688         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5689         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5690         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5691         .header_size = sizeof(struct smb2_hdr),
5692         .header_preamble_size = 0,
5693         .max_header_size = MAX_SMB2_HDR_SIZE,
5694         .read_rsp_size = sizeof(struct smb2_read_rsp),
5695         .lock_cmd = SMB2_LOCK,
5696         .cap_unix = 0,
5697         .cap_nt_find = SMB2_NT_FIND,
5698         .cap_large_files = SMB2_LARGE_FILES,
5699         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5700         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5701         .create_lease_size = sizeof(struct create_lease_v2),
5702 };
5703
5704 struct smb_version_values smb30_values = {
5705         .version_string = SMB30_VERSION_STRING,
5706         .protocol_id = SMB30_PROT_ID,
5707         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
5708         .large_lock_type = 0,
5709         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5710         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5711         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5712         .header_size = sizeof(struct smb2_hdr),
5713         .header_preamble_size = 0,
5714         .max_header_size = MAX_SMB2_HDR_SIZE,
5715         .read_rsp_size = sizeof(struct smb2_read_rsp),
5716         .lock_cmd = SMB2_LOCK,
5717         .cap_unix = 0,
5718         .cap_nt_find = SMB2_NT_FIND,
5719         .cap_large_files = SMB2_LARGE_FILES,
5720         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5721         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5722         .create_lease_size = sizeof(struct create_lease_v2),
5723 };
5724
5725 struct smb_version_values smb302_values = {
5726         .version_string = SMB302_VERSION_STRING,
5727         .protocol_id = SMB302_PROT_ID,
5728         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
5729         .large_lock_type = 0,
5730         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5731         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5732         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5733         .header_size = sizeof(struct smb2_hdr),
5734         .header_preamble_size = 0,
5735         .max_header_size = MAX_SMB2_HDR_SIZE,
5736         .read_rsp_size = sizeof(struct smb2_read_rsp),
5737         .lock_cmd = SMB2_LOCK,
5738         .cap_unix = 0,
5739         .cap_nt_find = SMB2_NT_FIND,
5740         .cap_large_files = SMB2_LARGE_FILES,
5741         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5742         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5743         .create_lease_size = sizeof(struct create_lease_v2),
5744 };
5745
5746 struct smb_version_values smb311_values = {
5747         .version_string = SMB311_VERSION_STRING,
5748         .protocol_id = SMB311_PROT_ID,
5749         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
5750         .large_lock_type = 0,
5751         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5752         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5753         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5754         .header_size = sizeof(struct smb2_hdr),
5755         .header_preamble_size = 0,
5756         .max_header_size = MAX_SMB2_HDR_SIZE,
5757         .read_rsp_size = sizeof(struct smb2_read_rsp),
5758         .lock_cmd = SMB2_LOCK,
5759         .cap_unix = 0,
5760         .cap_nt_find = SMB2_NT_FIND,
5761         .cap_large_files = SMB2_LARGE_FILES,
5762         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5763         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5764         .create_lease_size = sizeof(struct create_lease_v2),
5765 };