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 mark them as inactive
 599          */
 600         list_for_each_entry_safe(iface, niface, &ses->iface_list,
 601                                  iface_head)
 602                 iface->is_active = 0;
 603
 604         spin_unlock(&ses->iface_lock);
 605
 606         /*
 607          * Samba server e.g. can return an empty interface list in some cases,
 608          * which would only be a problem if we were requesting multichannel
 609          */
 610         if (bytes_left == 0) {
 611                 /* avoid spamming logs every 10 minutes, so log only in mount */
 612                 if ((ses->chan_max > 1) && in_mount)
 613                         cifs_dbg(VFS,
 614                                  "multichannel not available\n"
 615                                  "Empty network interface list returned by server %s\n",
 616                                  ses->server->hostname);
 617                 rc = -EOPNOTSUPP;
 618                 ses->iface_last_update = jiffies;
 619                 goto out;
 620         }
 621
 622         while (bytes_left >= (ssize_t)sizeof(*p)) {
 623                 memset(&tmp_iface, 0, sizeof(tmp_iface));
 624                 tmp_iface.speed = le64_to_cpu(p->LinkSpeed);
 625                 tmp_iface.rdma_capable = le32_to_cpu(p->Capability & RDMA_CAPABLE) ? 1 : 0;
 626                 tmp_iface.rss_capable = le32_to_cpu(p->Capability & RSS_CAPABLE) ? 1 : 0;
 627
 628                 switch (p->Family) {
 629                 /*
 630                  * The kernel and wire socket structures have the same
 631                  * layout and use network byte order but make the
 632                  * conversion explicit in case either one changes.
 633                  */
 634                 case INTERNETWORK:
 635                         addr4 = (struct sockaddr_in *)&tmp_iface.sockaddr;
 636                         p4 = (struct iface_info_ipv4 *)p->Buffer;
 637                         addr4->sin_family = AF_INET;
 638                         memcpy(&addr4->sin_addr, &p4->IPv4Address, 4);
 639
 640                         /* [MS-SMB2] 2.2.32.5.1.1 Clients MUST ignore these */
 641                         addr4->sin_port = cpu_to_be16(CIFS_PORT);
 642
 643                         cifs_dbg(FYI, "%s: ipv4 %pI4\n", __func__,
 644                                  &addr4->sin_addr);
 645                         break;
 646                 case INTERNETWORKV6:
 647                         addr6 = (struct sockaddr_in6 *)&tmp_iface.sockaddr;
 648                         p6 = (struct iface_info_ipv6 *)p->Buffer;
 649                         addr6->sin6_family = AF_INET6;
 650                         memcpy(&addr6->sin6_addr, &p6->IPv6Address, 16);
 651
 652                         /* [MS-SMB2] 2.2.32.5.1.2 Clients MUST ignore these */
 653                         addr6->sin6_flowinfo = 0;
 654                         addr6->sin6_scope_id = 0;
 655                         addr6->sin6_port = cpu_to_be16(CIFS_PORT);
 656
 657                         cifs_dbg(FYI, "%s: ipv6 %pI6\n", __func__,
 658                                  &addr6->sin6_addr);
 659                         break;
 660                 default:
 661                         cifs_dbg(VFS,
 662                                  "%s: skipping unsupported socket family\n",
 663                                  __func__);
 664                         goto next_iface;
 665                 }
 666
 667                 /*
 668                  * The iface_list is assumed to be sorted by speed.
 669                  * Check if the new interface exists in that list.
 670                  * NEVER change iface. it could be in use.
 671                  * Add a new one instead
 672                  */
 673                 spin_lock(&ses->iface_lock);
 674                 list_for_each_entry_safe(iface, niface, &ses->iface_list,
 675                                          iface_head) {
 676                         ret = iface_cmp(iface, &tmp_iface);
 677                         if (!ret) {
 678                                 iface->is_active = 1;
 679                                 spin_unlock(&ses->iface_lock);
 680                                 goto next_iface;
 681                         } else if (ret < 0) {
 682                                 /* all remaining ifaces are slower */
 683                                 kref_get(&iface->refcount);
 684                                 break;
 685                         }
 686                 }
 687                 spin_unlock(&ses->iface_lock);
 688
 689                 /* no match. insert the entry in the list */
 690                 info = kmalloc(sizeof(struct cifs_server_iface),
 691                                GFP_KERNEL);
 692                 if (!info) {
 693                         rc = -ENOMEM;
 694                         goto out;
 695                 }
 696                 memcpy(info, &tmp_iface, sizeof(tmp_iface));
 697
 698                 /* add this new entry to the list */
 699                 kref_init(&info->refcount);
 700                 info->is_active = 1;
 701
 702                 cifs_dbg(FYI, "%s: adding iface %zu\n", __func__, ses->iface_count);
 703                 cifs_dbg(FYI, "%s: speed %zu bps\n", __func__, info->speed);
 704                 cifs_dbg(FYI, "%s: capabilities 0x%08x\n", __func__,
 705                          le32_to_cpu(p->Capability));
 706
 707                 spin_lock(&ses->iface_lock);
 708                 if (!list_entry_is_head(iface, &ses->iface_list, iface_head)) {
 709                         list_add_tail(&info->iface_head, &iface->iface_head);
 710                         kref_put(&iface->refcount, release_iface);
 711                 } else
 712                         list_add_tail(&info->iface_head, &ses->iface_list);
 713
 714                 ses->iface_count++;
 715                 spin_unlock(&ses->iface_lock);
 716 next_iface:
 717                 nb_iface++;
 718                 next = le32_to_cpu(p->Next);
 719                 if (!next) {
 720                         bytes_left -= sizeof(*p);
 721                         break;
 722                 }
 723                 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next);
 724                 bytes_left -= next;
 725         }
 726
 727         if (!nb_iface) {
 728                 cifs_dbg(VFS, "%s: malformed interface info\n", __func__);
 729                 rc = -EINVAL;
 730                 goto out;
 731         }
 732
 733         /* Azure rounds the buffer size up 8, to a 16 byte boundary */
 734         if ((bytes_left > 8) || p->Next)
 735                 cifs_dbg(VFS, "%s: incomplete interface info\n", __func__);
 736
 737         ses->iface_last_update = jiffies;
 738
 739 out:
 740         /*
 741          * Go through the list again and put the inactive entries
 742          */
 743         spin_lock(&ses->iface_lock);
 744         list_for_each_entry_safe(iface, niface, &ses->iface_list,
 745                                  iface_head) {
 746                 if (!iface->is_active) {
 747                         list_del(&iface->iface_head);
 748                         kref_put(&iface->refcount, release_iface);
 749                         ses->iface_count--;
 750                 }
 751         }
 752         spin_unlock(&ses->iface_lock);
 753
 754         return rc;
 755 }
 756
 757 int
 758 SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon, bool in_mount)
 759 {
 760         int rc;
 761         unsigned int ret_data_len = 0;
 762         struct network_interface_info_ioctl_rsp *out_buf = NULL;
 763         struct cifs_ses *ses = tcon->ses;
 764         struct TCP_Server_Info *pserver;
 765
 766         /* do not query too frequently */
 767         if (ses->iface_last_update &&
 768             time_before(jiffies, ses->iface_last_update +
 769                         (SMB_INTERFACE_POLL_INTERVAL * HZ)))
 770                 return 0;
 771
 772         rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
 773                         FSCTL_QUERY_NETWORK_INTERFACE_INFO,
 774                         NULL /* no data input */, 0 /* no data input */,
 775                         CIFSMaxBufSize, (char **)&out_buf, &ret_data_len);
 776         if (rc == -EOPNOTSUPP) {
 777                 cifs_dbg(FYI,
 778                          "server does not support query network interfaces\n");
 779                 ret_data_len = 0;
 780         } else if (rc != 0) {
 781                 cifs_tcon_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
 782                 goto out;
 783         }
 784
 785         rc = parse_server_interfaces(out_buf, ret_data_len, ses, in_mount);
 786         if (rc)
 787                 goto out;
 788
 789         /* check if iface is still active */
 790         spin_lock(&ses->chan_lock);
 791         pserver = ses->chans[0].server;
 792         if (pserver && !cifs_chan_is_iface_active(ses, pserver)) {
 793                 spin_unlock(&ses->chan_lock);
 794                 cifs_chan_update_iface(ses, pserver);
 795                 spin_lock(&ses->chan_lock);
 796         }
 797         spin_unlock(&ses->chan_lock);
 798
 799 out:
 800         kfree(out_buf);
 801         return rc;
 802 }
 803
 804 static void
 805 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon,
 806               struct cifs_sb_info *cifs_sb)
 807 {
 808         int rc;
 809         __le16 srch_path = 0; /* Null - open root of share */
 810         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 811         struct cifs_open_parms oparms;
 812         struct cifs_fid fid;
 813         struct cached_fid *cfid = NULL;
 814
 815         oparms = (struct cifs_open_parms) {
 816                 .tcon = tcon,
 817                 .path = "",
 818                 .desired_access = FILE_READ_ATTRIBUTES,
 819                 .disposition = FILE_OPEN,
 820                 .create_options = cifs_create_options(cifs_sb, 0),
 821                 .fid = &fid,
 822         };
 823
 824         rc = open_cached_dir(xid, tcon, "", cifs_sb, false, &cfid);
 825         if (rc == 0)
 826                 memcpy(&fid, &cfid->fid, sizeof(struct cifs_fid));
 827         else
 828                 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
 829                                NULL, NULL);
 830         if (rc)
 831                 return;
 832
 833         SMB3_request_interfaces(xid, tcon, true /* called during  mount */);
 834
 835         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 836                         FS_ATTRIBUTE_INFORMATION);
 837         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 838                         FS_DEVICE_INFORMATION);
 839         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 840                         FS_VOLUME_INFORMATION);
 841         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 842                         FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
 843         if (cfid == NULL)
 844                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 845         else
 846                 close_cached_dir(cfid);
 847 }
 848
 849 static void
 850 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon,
 851               struct cifs_sb_info *cifs_sb)
 852 {
 853         int rc;
 854         __le16 srch_path = 0; /* Null - open root of share */
 855         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 856         struct cifs_open_parms oparms;
 857         struct cifs_fid fid;
 858
 859         oparms = (struct cifs_open_parms) {
 860                 .tcon = tcon,
 861                 .path = "",
 862                 .desired_access = FILE_READ_ATTRIBUTES,
 863                 .disposition = FILE_OPEN,
 864                 .create_options = cifs_create_options(cifs_sb, 0),
 865                 .fid = &fid,
 866         };
 867
 868         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
 869                        NULL, NULL);
 870         if (rc)
 871                 return;
 872
 873         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 874                         FS_ATTRIBUTE_INFORMATION);
 875         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 876                         FS_DEVICE_INFORMATION);
 877         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 878 }
 879
 880 static int
 881 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
 882                         struct cifs_sb_info *cifs_sb, const char *full_path)
 883 {
 884         __le16 *utf16_path;
 885         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 886         int err_buftype = CIFS_NO_BUFFER;
 887         struct cifs_open_parms oparms;
 888         struct kvec err_iov = {};
 889         struct cifs_fid fid;
 890         struct cached_fid *cfid;
 891         bool islink;
 892         int rc, rc2;
 893
 894         rc = open_cached_dir(xid, tcon, full_path, cifs_sb, true, &cfid);
 895         if (!rc) {
 896                 if (cfid->has_lease) {
 897                         close_cached_dir(cfid);
 898                         return 0;
 899                 }
 900                 close_cached_dir(cfid);
 901         }
 902
 903         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
 904         if (!utf16_path)
 905                 return -ENOMEM;
 906
 907         oparms = (struct cifs_open_parms) {
 908                 .tcon = tcon,
 909                 .path = full_path,
 910                 .desired_access = FILE_READ_ATTRIBUTES,
 911                 .disposition = FILE_OPEN,
 912                 .create_options = cifs_create_options(cifs_sb, 0),
 913                 .fid = &fid,
 914         };
 915
 916         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL,
 917                        &err_iov, &err_buftype);
 918         if (rc) {
 919                 struct smb2_hdr *hdr = err_iov.iov_base;
 920
 921                 if (unlikely(!hdr || err_buftype == CIFS_NO_BUFFER))
 922                         goto out;
 923
 924                 if (rc != -EREMOTE && hdr->Status == STATUS_OBJECT_NAME_INVALID) {
 925                         rc2 = cifs_inval_name_dfs_link_error(xid, tcon, cifs_sb,
 926                                                              full_path, &islink);
 927                         if (rc2) {
 928                                 rc = rc2;
 929                                 goto out;
 930                         }
 931                         if (islink)
 932                                 rc = -EREMOTE;
 933                 }
 934                 if (rc == -EREMOTE && IS_ENABLED(CONFIG_CIFS_DFS_UPCALL) && cifs_sb &&
 935                     (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_DFS))
 936                         rc = -EOPNOTSUPP;
 937                 goto out;
 938         }
 939
 940         rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 941
 942 out:
 943         free_rsp_buf(err_buftype, err_iov.iov_base);
 944         kfree(utf16_path);
 945         return rc;
 946 }
 947
 948 static int smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
 949                              struct cifs_sb_info *cifs_sb, const char *full_path,
 950                              u64 *uniqueid, struct cifs_open_info_data *data)
 951 {
 952         *uniqueid = le64_to_cpu(data->fi.IndexNumber);
 953         return 0;
 954 }
 955
 956 static int smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
 957                                 struct cifsFileInfo *cfile, struct cifs_open_info_data *data)
 958 {
 959         struct cifs_fid *fid = &cfile->fid;
 960
 961         if (cfile->symlink_target) {
 962                 data->symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL);
 963                 if (!data->symlink_target)
 964                         return -ENOMEM;
 965         }
 966         return SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid, &data->fi);
 967 }
 968
 969 #ifdef CONFIG_CIFS_XATTR
 970 static ssize_t
 971 move_smb2_ea_to_cifs(char *dst, size_t dst_size,
 972                      struct smb2_file_full_ea_info *src, size_t src_size,
 973                      const unsigned char *ea_name)
 974 {
 975         int rc = 0;
 976         unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0;
 977         char *name, *value;
 978         size_t buf_size = dst_size;
 979         size_t name_len, value_len, user_name_len;
 980
 981         while (src_size > 0) {
 982                 name_len = (size_t)src->ea_name_length;
 983                 value_len = (size_t)le16_to_cpu(src->ea_value_length);
 984
 985                 if (name_len == 0)
 986                         break;
 987
 988                 if (src_size < 8 + name_len + 1 + value_len) {
 989                         cifs_dbg(FYI, "EA entry goes beyond length of list\n");
 990                         rc = -EIO;
 991                         goto out;
 992                 }
 993
 994                 name = &src->ea_data[0];
 995                 value = &src->ea_data[src->ea_name_length + 1];
 996
 997                 if (ea_name) {
 998                         if (ea_name_len == name_len &&
 999                             memcmp(ea_name, name, name_len) == 0) {
1000                                 rc = value_len;
1001                                 if (dst_size == 0)
1002                                         goto out;
1003                                 if (dst_size < value_len) {
1004                                         rc = -ERANGE;
1005                                         goto out;
1006                                 }
1007                                 memcpy(dst, value, value_len);
1008                                 goto out;
1009                         }
1010                 } else {
1011                         /* 'user.' plus a terminating null */
1012                         user_name_len = 5 + 1 + name_len;
1013
1014                         if (buf_size == 0) {
1015                                 /* skip copy - calc size only */
1016                                 rc += user_name_len;
1017                         } else if (dst_size >= user_name_len) {
1018                                 dst_size -= user_name_len;
1019                                 memcpy(dst, "user.", 5);
1020                                 dst += 5;
1021                                 memcpy(dst, src->ea_data, name_len);
1022                                 dst += name_len;
1023                                 *dst = 0;
1024                                 ++dst;
1025                                 rc += user_name_len;
1026                         } else {
1027                                 /* stop before overrun buffer */
1028                                 rc = -ERANGE;
1029                                 break;
1030                         }
1031                 }
1032
1033                 if (!src->next_entry_offset)
1034                         break;
1035
1036                 if (src_size < le32_to_cpu(src->next_entry_offset)) {
1037                         /* stop before overrun buffer */
1038                         rc = -ERANGE;
1039                         break;
1040                 }
1041                 src_size -= le32_to_cpu(src->next_entry_offset);
1042                 src = (void *)((char *)src +
1043                                le32_to_cpu(src->next_entry_offset));
1044         }
1045
1046         /* didn't find the named attribute */
1047         if (ea_name)
1048                 rc = -ENODATA;
1049
1050 out:
1051         return (ssize_t)rc;
1052 }
1053
1054 static ssize_t
1055 smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon,
1056                const unsigned char *path, const unsigned char *ea_name,
1057                char *ea_data, size_t buf_size,
1058                struct cifs_sb_info *cifs_sb)
1059 {
1060         int rc;
1061         struct kvec rsp_iov = {NULL, 0};
1062         int buftype = CIFS_NO_BUFFER;
1063         struct smb2_query_info_rsp *rsp;
1064         struct smb2_file_full_ea_info *info = NULL;
1065
1066         rc = smb2_query_info_compound(xid, tcon, path,
1067                                       FILE_READ_EA,
1068                                       FILE_FULL_EA_INFORMATION,
1069                                       SMB2_O_INFO_FILE,
1070                                       CIFSMaxBufSize -
1071                                       MAX_SMB2_CREATE_RESPONSE_SIZE -
1072                                       MAX_SMB2_CLOSE_RESPONSE_SIZE,
1073                                       &rsp_iov, &buftype, cifs_sb);
1074         if (rc) {
1075                 /*
1076                  * If ea_name is NULL (listxattr) and there are no EAs,
1077                  * return 0 as it's not an error. Otherwise, the specified
1078                  * ea_name was not found.
1079                  */
1080                 if (!ea_name && rc == -ENODATA)
1081                         rc = 0;
1082                 goto qeas_exit;
1083         }
1084
1085         rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
1086         rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
1087                                le32_to_cpu(rsp->OutputBufferLength),
1088                                &rsp_iov,
1089                                sizeof(struct smb2_file_full_ea_info));
1090         if (rc)
1091                 goto qeas_exit;
1092
1093         info = (struct smb2_file_full_ea_info *)(
1094                         le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
1095         rc = move_smb2_ea_to_cifs(ea_data, buf_size, info,
1096                         le32_to_cpu(rsp->OutputBufferLength), ea_name);
1097
1098  qeas_exit:
1099         free_rsp_buf(buftype, rsp_iov.iov_base);
1100         return rc;
1101 }
1102
1103 static int
1104 smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
1105             const char *path, const char *ea_name, const void *ea_value,
1106             const __u16 ea_value_len, const struct nls_table *nls_codepage,
1107             struct cifs_sb_info *cifs_sb)
1108 {
1109         struct smb2_compound_vars *vars;
1110         struct cifs_ses *ses = tcon->ses;
1111         struct TCP_Server_Info *server = cifs_pick_channel(ses);
1112         struct smb_rqst *rqst;
1113         struct kvec *rsp_iov;
1114         __le16 *utf16_path = NULL;
1115         int ea_name_len = strlen(ea_name);
1116         int flags = CIFS_CP_CREATE_CLOSE_OP;
1117         int len;
1118         int resp_buftype[3];
1119         struct cifs_open_parms oparms;
1120         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1121         struct cifs_fid fid;
1122         unsigned int size[1];
1123         void *data[1];
1124         struct smb2_file_full_ea_info *ea = NULL;
1125         struct smb2_query_info_rsp *rsp;
1126         int rc, used_len = 0;
1127
1128         if (smb3_encryption_required(tcon))
1129                 flags |= CIFS_TRANSFORM_REQ;
1130
1131         if (ea_name_len > 255)
1132                 return -EINVAL;
1133
1134         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1135         if (!utf16_path)
1136                 return -ENOMEM;
1137
1138         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1139         vars = kzalloc(sizeof(*vars), GFP_KERNEL);
1140         if (!vars) {
1141                 rc = -ENOMEM;
1142                 goto out_free_path;
1143         }
1144         rqst = vars->rqst;
1145         rsp_iov = vars->rsp_iov;
1146
1147         if (ses->server->ops->query_all_EAs) {
1148                 if (!ea_value) {
1149                         rc = ses->server->ops->query_all_EAs(xid, tcon, path,
1150                                                              ea_name, NULL, 0,
1151                                                              cifs_sb);
1152                         if (rc == -ENODATA)
1153                                 goto sea_exit;
1154                 } else {
1155                         /* If we are adding a attribute we should first check
1156                          * if there will be enough space available to store
1157                          * the new EA. If not we should not add it since we
1158                          * would not be able to even read the EAs back.
1159                          */
1160                         rc = smb2_query_info_compound(xid, tcon, path,
1161                                       FILE_READ_EA,
1162                                       FILE_FULL_EA_INFORMATION,
1163                                       SMB2_O_INFO_FILE,
1164                                       CIFSMaxBufSize -
1165                                       MAX_SMB2_CREATE_RESPONSE_SIZE -
1166                                       MAX_SMB2_CLOSE_RESPONSE_SIZE,
1167                                       &rsp_iov[1], &resp_buftype[1], cifs_sb);
1168                         if (rc == 0) {
1169                                 rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
1170                                 used_len = le32_to_cpu(rsp->OutputBufferLength);
1171                         }
1172                         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1173                         resp_buftype[1] = CIFS_NO_BUFFER;
1174                         memset(&rsp_iov[1], 0, sizeof(rsp_iov[1]));
1175                         rc = 0;
1176
1177                         /* Use a fudge factor of 256 bytes in case we collide
1178                          * with a different set_EAs command.
1179                          */
1180                         if (CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE -
1181                            MAX_SMB2_CLOSE_RESPONSE_SIZE - 256 <
1182                            used_len + ea_name_len + ea_value_len + 1) {
1183                                 rc = -ENOSPC;
1184                                 goto sea_exit;
1185                         }
1186                 }
1187         }
1188
1189         /* Open */
1190         rqst[0].rq_iov = vars->open_iov;
1191         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1192
1193         oparms = (struct cifs_open_parms) {
1194                 .tcon = tcon,
1195                 .path = path,
1196                 .desired_access = FILE_WRITE_EA,
1197                 .disposition = FILE_OPEN,
1198                 .create_options = cifs_create_options(cifs_sb, 0),
1199                 .fid = &fid,
1200         };
1201
1202         rc = SMB2_open_init(tcon, server,
1203                             &rqst[0], &oplock, &oparms, utf16_path);
1204         if (rc)
1205                 goto sea_exit;
1206         smb2_set_next_command(tcon, &rqst[0]);
1207
1208
1209         /* Set Info */
1210         rqst[1].rq_iov = vars->si_iov;
1211         rqst[1].rq_nvec = 1;
1212
1213         len = sizeof(*ea) + ea_name_len + ea_value_len + 1;
1214         ea = kzalloc(len, GFP_KERNEL);
1215         if (ea == NULL) {
1216                 rc = -ENOMEM;
1217                 goto sea_exit;
1218         }
1219
1220         ea->ea_name_length = ea_name_len;
1221         ea->ea_value_length = cpu_to_le16(ea_value_len);
1222         memcpy(ea->ea_data, ea_name, ea_name_len + 1);
1223         memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len);
1224
1225         size[0] = len;
1226         data[0] = ea;
1227
1228         rc = SMB2_set_info_init(tcon, server,
1229                                 &rqst[1], COMPOUND_FID,
1230                                 COMPOUND_FID, current->tgid,
1231                                 FILE_FULL_EA_INFORMATION,
1232                                 SMB2_O_INFO_FILE, 0, data, size);
1233         if (rc)
1234                 goto sea_exit;
1235         smb2_set_next_command(tcon, &rqst[1]);
1236         smb2_set_related(&rqst[1]);
1237
1238         /* Close */
1239         rqst[2].rq_iov = &vars->close_iov;
1240         rqst[2].rq_nvec = 1;
1241         rc = SMB2_close_init(tcon, server,
1242                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
1243         if (rc)
1244                 goto sea_exit;
1245         smb2_set_related(&rqst[2]);
1246
1247         rc = compound_send_recv(xid, ses, server,
1248                                 flags, 3, rqst,
1249                                 resp_buftype, rsp_iov);
1250         /* no need to bump num_remote_opens because handle immediately closed */
1251
1252  sea_exit:
1253         kfree(ea);
1254         SMB2_open_free(&rqst[0]);
1255         SMB2_set_info_free(&rqst[1]);
1256         SMB2_close_free(&rqst[2]);
1257         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1258         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1259         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1260         kfree(vars);
1261 out_free_path:
1262         kfree(utf16_path);
1263         return rc;
1264 }
1265 #endif
1266
1267 static bool
1268 smb2_can_echo(struct TCP_Server_Info *server)
1269 {
1270         return server->echoes;
1271 }
1272
1273 static void
1274 smb2_clear_stats(struct cifs_tcon *tcon)
1275 {
1276         int i;
1277
1278         for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
1279                 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
1280                 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
1281         }
1282 }
1283
1284 static void
1285 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
1286 {
1287         seq_puts(m, "\n\tShare Capabilities:");
1288         if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
1289                 seq_puts(m, " DFS,");
1290         if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
1291                 seq_puts(m, " CONTINUOUS AVAILABILITY,");
1292         if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
1293                 seq_puts(m, " SCALEOUT,");
1294         if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
1295                 seq_puts(m, " CLUSTER,");
1296         if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
1297                 seq_puts(m, " ASYMMETRIC,");
1298         if (tcon->capabilities == 0)
1299                 seq_puts(m, " None");
1300         if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
1301                 seq_puts(m, " Aligned,");
1302         if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
1303                 seq_puts(m, " Partition Aligned,");
1304         if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
1305                 seq_puts(m, " SSD,");
1306         if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
1307                 seq_puts(m, " TRIM-support,");
1308
1309         seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
1310         seq_printf(m, "\n\ttid: 0x%x", tcon->tid);
1311         if (tcon->perf_sector_size)
1312                 seq_printf(m, "\tOptimal sector size: 0x%x",
1313                            tcon->perf_sector_size);
1314         seq_printf(m, "\tMaximal Access: 0x%x", tcon->maximal_access);
1315 }
1316
1317 static void
1318 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
1319 {
1320         atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
1321         atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
1322
1323         /*
1324          *  Can't display SMB2_NEGOTIATE, SESSION_SETUP, LOGOFF, CANCEL and ECHO
1325          *  totals (requests sent) since those SMBs are per-session not per tcon
1326          */
1327         seq_printf(m, "\nBytes read: %llu  Bytes written: %llu",
1328                    (long long)(tcon->bytes_read),
1329                    (long long)(tcon->bytes_written));
1330         seq_printf(m, "\nOpen files: %d total (local), %d open on server",
1331                    atomic_read(&tcon->num_local_opens),
1332                    atomic_read(&tcon->num_remote_opens));
1333         seq_printf(m, "\nTreeConnects: %d total %d failed",
1334                    atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
1335                    atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
1336         seq_printf(m, "\nTreeDisconnects: %d total %d failed",
1337                    atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
1338                    atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
1339         seq_printf(m, "\nCreates: %d total %d failed",
1340                    atomic_read(&sent[SMB2_CREATE_HE]),
1341                    atomic_read(&failed[SMB2_CREATE_HE]));
1342         seq_printf(m, "\nCloses: %d total %d failed",
1343                    atomic_read(&sent[SMB2_CLOSE_HE]),
1344                    atomic_read(&failed[SMB2_CLOSE_HE]));
1345         seq_printf(m, "\nFlushes: %d total %d failed",
1346                    atomic_read(&sent[SMB2_FLUSH_HE]),
1347                    atomic_read(&failed[SMB2_FLUSH_HE]));
1348         seq_printf(m, "\nReads: %d total %d failed",
1349                    atomic_read(&sent[SMB2_READ_HE]),
1350                    atomic_read(&failed[SMB2_READ_HE]));
1351         seq_printf(m, "\nWrites: %d total %d failed",
1352                    atomic_read(&sent[SMB2_WRITE_HE]),
1353                    atomic_read(&failed[SMB2_WRITE_HE]));
1354         seq_printf(m, "\nLocks: %d total %d failed",
1355                    atomic_read(&sent[SMB2_LOCK_HE]),
1356                    atomic_read(&failed[SMB2_LOCK_HE]));
1357         seq_printf(m, "\nIOCTLs: %d total %d failed",
1358                    atomic_read(&sent[SMB2_IOCTL_HE]),
1359                    atomic_read(&failed[SMB2_IOCTL_HE]));
1360         seq_printf(m, "\nQueryDirectories: %d total %d failed",
1361                    atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
1362                    atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
1363         seq_printf(m, "\nChangeNotifies: %d total %d failed",
1364                    atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
1365                    atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
1366         seq_printf(m, "\nQueryInfos: %d total %d failed",
1367                    atomic_read(&sent[SMB2_QUERY_INFO_HE]),
1368                    atomic_read(&failed[SMB2_QUERY_INFO_HE]));
1369         seq_printf(m, "\nSetInfos: %d total %d failed",
1370                    atomic_read(&sent[SMB2_SET_INFO_HE]),
1371                    atomic_read(&failed[SMB2_SET_INFO_HE]));
1372         seq_printf(m, "\nOplockBreaks: %d sent %d failed",
1373                    atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
1374                    atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
1375 }
1376
1377 static void
1378 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
1379 {
1380         struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
1381         struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
1382
1383         cfile->fid.persistent_fid = fid->persistent_fid;
1384         cfile->fid.volatile_fid = fid->volatile_fid;
1385         cfile->fid.access = fid->access;
1386 #ifdef CONFIG_CIFS_DEBUG2
1387         cfile->fid.mid = fid->mid;
1388 #endif /* CIFS_DEBUG2 */
1389         server->ops->set_oplock_level(cinode, oplock, fid->epoch,
1390                                       &fid->purge_cache);
1391         cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
1392         memcpy(cfile->fid.create_guid, fid->create_guid, 16);
1393 }
1394
1395 static void
1396 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
1397                 struct cifs_fid *fid)
1398 {
1399         SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1400 }
1401
1402 static void
1403 smb2_close_getattr(const unsigned int xid, struct cifs_tcon *tcon,
1404                    struct cifsFileInfo *cfile)
1405 {
1406         struct smb2_file_network_open_info file_inf;
1407         struct inode *inode;
1408         int rc;
1409
1410         rc = __SMB2_close(xid, tcon, cfile->fid.persistent_fid,
1411                    cfile->fid.volatile_fid, &file_inf);
1412         if (rc)
1413                 return;
1414
1415         inode = d_inode(cfile->dentry);
1416
1417         spin_lock(&inode->i_lock);
1418         CIFS_I(inode)->time = jiffies;
1419
1420         /* Creation time should not need to be updated on close */
1421         if (file_inf.LastWriteTime)
1422                 inode_set_mtime_to_ts(inode,
1423                                       cifs_NTtimeToUnix(file_inf.LastWriteTime));
1424         if (file_inf.ChangeTime)
1425                 inode_set_ctime_to_ts(inode,
1426                                       cifs_NTtimeToUnix(file_inf.ChangeTime));
1427         if (file_inf.LastAccessTime)
1428                 inode_set_atime_to_ts(inode,
1429                                       cifs_NTtimeToUnix(file_inf.LastAccessTime));
1430
1431         /*
1432          * i_blocks is not related to (i_size / i_blksize),
1433          * but instead 512 byte (2**9) size is required for
1434          * calculating num blocks.
1435          */
1436         if (le64_to_cpu(file_inf.AllocationSize) > 4096)
1437                 inode->i_blocks =
1438                         (512 - 1 + le64_to_cpu(file_inf.AllocationSize)) >> 9;
1439
1440         /* End of file and Attributes should not have to be updated on close */
1441         spin_unlock(&inode->i_lock);
1442 }
1443
1444 static int
1445 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
1446                      u64 persistent_fid, u64 volatile_fid,
1447                      struct copychunk_ioctl *pcchunk)
1448 {
1449         int rc;
1450         unsigned int ret_data_len;
1451         struct resume_key_req *res_key;
1452
1453         rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
1454                         FSCTL_SRV_REQUEST_RESUME_KEY, NULL, 0 /* no input */,
1455                         CIFSMaxBufSize, (char **)&res_key, &ret_data_len);
1456
1457         if (rc == -EOPNOTSUPP) {
1458                 pr_warn_once("Server share %s does not support copy range\n", tcon->tree_name);
1459                 goto req_res_key_exit;
1460         } else if (rc) {
1461                 cifs_tcon_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
1462                 goto req_res_key_exit;
1463         }
1464         if (ret_data_len < sizeof(struct resume_key_req)) {
1465                 cifs_tcon_dbg(VFS, "Invalid refcopy resume key length\n");
1466                 rc = -EINVAL;
1467                 goto req_res_key_exit;
1468         }
1469         memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
1470
1471 req_res_key_exit:
1472         kfree(res_key);
1473         return rc;
1474 }
1475
1476 static int
1477 smb2_ioctl_query_info(const unsigned int xid,
1478                       struct cifs_tcon *tcon,
1479                       struct cifs_sb_info *cifs_sb,
1480                       __le16 *path, int is_dir,
1481                       unsigned long p)
1482 {
1483         struct smb2_compound_vars *vars;
1484         struct smb_rqst *rqst;
1485         struct kvec *rsp_iov;
1486         struct cifs_ses *ses = tcon->ses;
1487         struct TCP_Server_Info *server = cifs_pick_channel(ses);
1488         char __user *arg = (char __user *)p;
1489         struct smb_query_info qi;
1490         struct smb_query_info __user *pqi;
1491         int rc = 0;
1492         int flags = CIFS_CP_CREATE_CLOSE_OP;
1493         struct smb2_query_info_rsp *qi_rsp = NULL;
1494         struct smb2_ioctl_rsp *io_rsp = NULL;
1495         void *buffer = NULL;
1496         int resp_buftype[3];
1497         struct cifs_open_parms oparms;
1498         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1499         struct cifs_fid fid;
1500         unsigned int size[2];
1501         void *data[2];
1502         int create_options = is_dir ? CREATE_NOT_FILE : CREATE_NOT_DIR;
1503         void (*free_req1_func)(struct smb_rqst *r);
1504
1505         vars = kzalloc(sizeof(*vars), GFP_ATOMIC);
1506         if (vars == NULL)
1507                 return -ENOMEM;
1508         rqst = &vars->rqst[0];
1509         rsp_iov = &vars->rsp_iov[0];
1510
1511         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1512
1513         if (copy_from_user(&qi, arg, sizeof(struct smb_query_info))) {
1514                 rc = -EFAULT;
1515                 goto free_vars;
1516         }
1517         if (qi.output_buffer_length > 1024) {
1518                 rc = -EINVAL;
1519                 goto free_vars;
1520         }
1521
1522         if (!ses || !server) {
1523                 rc = -EIO;
1524                 goto free_vars;
1525         }
1526
1527         if (smb3_encryption_required(tcon))
1528                 flags |= CIFS_TRANSFORM_REQ;
1529
1530         if (qi.output_buffer_length) {
1531                 buffer = memdup_user(arg + sizeof(struct smb_query_info), qi.output_buffer_length);
1532                 if (IS_ERR(buffer)) {
1533                         rc = PTR_ERR(buffer);
1534                         goto free_vars;
1535                 }
1536         }
1537
1538         /* Open */
1539         rqst[0].rq_iov = &vars->open_iov[0];
1540         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1541
1542         oparms = (struct cifs_open_parms) {
1543                 .tcon = tcon,
1544                 .disposition = FILE_OPEN,
1545                 .create_options = cifs_create_options(cifs_sb, create_options),
1546                 .fid = &fid,
1547         };
1548
1549         if (qi.flags & PASSTHRU_FSCTL) {
1550                 switch (qi.info_type & FSCTL_DEVICE_ACCESS_MASK) {
1551                 case FSCTL_DEVICE_ACCESS_FILE_READ_WRITE_ACCESS:
1552                         oparms.desired_access = FILE_READ_DATA | FILE_WRITE_DATA | FILE_READ_ATTRIBUTES | SYNCHRONIZE;
1553                         break;
1554                 case FSCTL_DEVICE_ACCESS_FILE_ANY_ACCESS:
1555                         oparms.desired_access = GENERIC_ALL;
1556                         break;
1557                 case FSCTL_DEVICE_ACCESS_FILE_READ_ACCESS:
1558                         oparms.desired_access = GENERIC_READ;
1559                         break;
1560                 case FSCTL_DEVICE_ACCESS_FILE_WRITE_ACCESS:
1561                         oparms.desired_access = GENERIC_WRITE;
1562                         break;
1563                 }
1564         } else if (qi.flags & PASSTHRU_SET_INFO) {
1565                 oparms.desired_access = GENERIC_WRITE;
1566         } else {
1567                 oparms.desired_access = FILE_READ_ATTRIBUTES | READ_CONTROL;
1568         }
1569
1570         rc = SMB2_open_init(tcon, server,
1571                             &rqst[0], &oplock, &oparms, path);
1572         if (rc)
1573                 goto free_output_buffer;
1574         smb2_set_next_command(tcon, &rqst[0]);
1575
1576         /* Query */
1577         if (qi.flags & PASSTHRU_FSCTL) {
1578                 /* Can eventually relax perm check since server enforces too */
1579                 if (!capable(CAP_SYS_ADMIN)) {
1580                         rc = -EPERM;
1581                         goto free_open_req;
1582                 }
1583                 rqst[1].rq_iov = &vars->io_iov[0];
1584                 rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
1585
1586                 rc = SMB2_ioctl_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID,
1587                                      qi.info_type, buffer, qi.output_buffer_length,
1588                                      CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE -
1589                                      MAX_SMB2_CLOSE_RESPONSE_SIZE);
1590                 free_req1_func = SMB2_ioctl_free;
1591         } else if (qi.flags == PASSTHRU_SET_INFO) {
1592                 /* Can eventually relax perm check since server enforces too */
1593                 if (!capable(CAP_SYS_ADMIN)) {
1594                         rc = -EPERM;
1595                         goto free_open_req;
1596                 }
1597                 if (qi.output_buffer_length < 8) {
1598                         rc = -EINVAL;
1599                         goto free_open_req;
1600                 }
1601                 rqst[1].rq_iov = vars->si_iov;
1602                 rqst[1].rq_nvec = 1;
1603
1604                 /* MS-FSCC 2.4.13 FileEndOfFileInformation */
1605                 size[0] = 8;
1606                 data[0] = buffer;
1607
1608                 rc = SMB2_set_info_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID,
1609                                         current->tgid, FILE_END_OF_FILE_INFORMATION,
1610                                         SMB2_O_INFO_FILE, 0, data, size);
1611                 free_req1_func = SMB2_set_info_free;
1612         } else if (qi.flags == PASSTHRU_QUERY_INFO) {
1613                 rqst[1].rq_iov = &vars->qi_iov;
1614                 rqst[1].rq_nvec = 1;
1615
1616                 rc = SMB2_query_info_init(tcon, server,
1617                                   &rqst[1], COMPOUND_FID,
1618                                   COMPOUND_FID, qi.file_info_class,
1619                                   qi.info_type, qi.additional_information,
1620                                   qi.input_buffer_length,
1621                                   qi.output_buffer_length, buffer);
1622                 free_req1_func = SMB2_query_info_free;
1623         } else { /* unknown flags */
1624                 cifs_tcon_dbg(VFS, "Invalid passthru query flags: 0x%x\n",
1625                               qi.flags);
1626                 rc = -EINVAL;
1627         }
1628
1629         if (rc)
1630                 goto free_open_req;
1631         smb2_set_next_command(tcon, &rqst[1]);
1632         smb2_set_related(&rqst[1]);
1633
1634         /* Close */
1635         rqst[2].rq_iov = &vars->close_iov;
1636         rqst[2].rq_nvec = 1;
1637
1638         rc = SMB2_close_init(tcon, server,
1639                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
1640         if (rc)
1641                 goto free_req_1;
1642         smb2_set_related(&rqst[2]);
1643
1644         rc = compound_send_recv(xid, ses, server,
1645                                 flags, 3, rqst,
1646                                 resp_buftype, rsp_iov);
1647         if (rc)
1648                 goto out;
1649
1650         /* No need to bump num_remote_opens since handle immediately closed */
1651         if (qi.flags & PASSTHRU_FSCTL) {
1652                 pqi = (struct smb_query_info __user *)arg;
1653                 io_rsp = (struct smb2_ioctl_rsp *)rsp_iov[1].iov_base;
1654                 if (le32_to_cpu(io_rsp->OutputCount) < qi.input_buffer_length)
1655                         qi.input_buffer_length = le32_to_cpu(io_rsp->OutputCount);
1656                 if (qi.input_buffer_length > 0 &&
1657                     le32_to_cpu(io_rsp->OutputOffset) + qi.input_buffer_length
1658                     > rsp_iov[1].iov_len) {
1659                         rc = -EFAULT;
1660                         goto out;
1661                 }
1662
1663                 if (copy_to_user(&pqi->input_buffer_length,
1664                                  &qi.input_buffer_length,
1665                                  sizeof(qi.input_buffer_length))) {
1666                         rc = -EFAULT;
1667                         goto out;
1668                 }
1669
1670                 if (copy_to_user((void __user *)pqi + sizeof(struct smb_query_info),
1671                                  (const void *)io_rsp + le32_to_cpu(io_rsp->OutputOffset),
1672                                  qi.input_buffer_length))
1673                         rc = -EFAULT;
1674         } else {
1675                 pqi = (struct smb_query_info __user *)arg;
1676                 qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
1677                 if (le32_to_cpu(qi_rsp->OutputBufferLength) < qi.input_buffer_length)
1678                         qi.input_buffer_length = le32_to_cpu(qi_rsp->OutputBufferLength);
1679                 if (copy_to_user(&pqi->input_buffer_length,
1680                                  &qi.input_buffer_length,
1681                                  sizeof(qi.input_buffer_length))) {
1682                         rc = -EFAULT;
1683                         goto out;
1684                 }
1685
1686                 if (copy_to_user(pqi + 1, qi_rsp->Buffer,
1687                                  qi.input_buffer_length))
1688                         rc = -EFAULT;
1689         }
1690
1691 out:
1692         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1693         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1694         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1695         SMB2_close_free(&rqst[2]);
1696 free_req_1:
1697         free_req1_func(&rqst[1]);
1698 free_open_req:
1699         SMB2_open_free(&rqst[0]);
1700 free_output_buffer:
1701         kfree(buffer);
1702 free_vars:
1703         kfree(vars);
1704         return rc;
1705 }
1706
1707 static ssize_t
1708 smb2_copychunk_range(const unsigned int xid,
1709                         struct cifsFileInfo *srcfile,
1710                         struct cifsFileInfo *trgtfile, u64 src_off,
1711                         u64 len, u64 dest_off)
1712 {
1713         int rc;
1714         unsigned int ret_data_len;
1715         struct copychunk_ioctl *pcchunk;
1716         struct copychunk_ioctl_rsp *retbuf = NULL;
1717         struct cifs_tcon *tcon;
1718         int chunks_copied = 0;
1719         bool chunk_sizes_updated = false;
1720         ssize_t bytes_written, total_bytes_written = 0;
1721
1722         pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
1723         if (pcchunk == NULL)
1724                 return -ENOMEM;
1725
1726         cifs_dbg(FYI, "%s: about to call request res key\n", __func__);
1727         /* Request a key from the server to identify the source of the copy */
1728         rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
1729                                 srcfile->fid.persistent_fid,
1730                                 srcfile->fid.volatile_fid, pcchunk);
1731
1732         /* Note: request_res_key sets res_key null only if rc !=0 */
1733         if (rc)
1734                 goto cchunk_out;
1735
1736         /* For now array only one chunk long, will make more flexible later */
1737         pcchunk->ChunkCount = cpu_to_le32(1);
1738         pcchunk->Reserved = 0;
1739         pcchunk->Reserved2 = 0;
1740
1741         tcon = tlink_tcon(trgtfile->tlink);
1742
1743         while (len > 0) {
1744                 pcchunk->SourceOffset = cpu_to_le64(src_off);
1745                 pcchunk->TargetOffset = cpu_to_le64(dest_off);
1746                 pcchunk->Length =
1747                         cpu_to_le32(min_t(u64, len, tcon->max_bytes_chunk));
1748
1749                 /* Request server copy to target from src identified by key */
1750                 kfree(retbuf);
1751                 retbuf = NULL;
1752                 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1753                         trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
1754                         (char *)pcchunk, sizeof(struct copychunk_ioctl),
1755                         CIFSMaxBufSize, (char **)&retbuf, &ret_data_len);
1756                 if (rc == 0) {
1757                         if (ret_data_len !=
1758                                         sizeof(struct copychunk_ioctl_rsp)) {
1759                                 cifs_tcon_dbg(VFS, "Invalid cchunk response size\n");
1760                                 rc = -EIO;
1761                                 goto cchunk_out;
1762                         }
1763                         if (retbuf->TotalBytesWritten == 0) {
1764                                 cifs_dbg(FYI, "no bytes copied\n");
1765                                 rc = -EIO;
1766                                 goto cchunk_out;
1767                         }
1768                         /*
1769                          * Check if server claimed to write more than we asked
1770                          */
1771                         if (le32_to_cpu(retbuf->TotalBytesWritten) >
1772                             le32_to_cpu(pcchunk->Length)) {
1773                                 cifs_tcon_dbg(VFS, "Invalid copy chunk response\n");
1774                                 rc = -EIO;
1775                                 goto cchunk_out;
1776                         }
1777                         if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
1778                                 cifs_tcon_dbg(VFS, "Invalid num chunks written\n");
1779                                 rc = -EIO;
1780                                 goto cchunk_out;
1781                         }
1782                         chunks_copied++;
1783
1784                         bytes_written = le32_to_cpu(retbuf->TotalBytesWritten);
1785                         src_off += bytes_written;
1786                         dest_off += bytes_written;
1787                         len -= bytes_written;
1788                         total_bytes_written += bytes_written;
1789
1790                         cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n",
1791                                 le32_to_cpu(retbuf->ChunksWritten),
1792                                 le32_to_cpu(retbuf->ChunkBytesWritten),
1793                                 bytes_written);
1794                 } else if (rc == -EINVAL) {
1795                         if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
1796                                 goto cchunk_out;
1797
1798                         cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
1799                                 le32_to_cpu(retbuf->ChunksWritten),
1800                                 le32_to_cpu(retbuf->ChunkBytesWritten),
1801                                 le32_to_cpu(retbuf->TotalBytesWritten));
1802
1803                         /*
1804                          * Check if this is the first request using these sizes,
1805                          * (ie check if copy succeed once with original sizes
1806                          * and check if the server gave us different sizes after
1807                          * we already updated max sizes on previous request).
1808                          * if not then why is the server returning an error now
1809                          */
1810                         if ((chunks_copied != 0) || chunk_sizes_updated)
1811                                 goto cchunk_out;
1812
1813                         /* Check that server is not asking us to grow size */
1814                         if (le32_to_cpu(retbuf->ChunkBytesWritten) <
1815                                         tcon->max_bytes_chunk)
1816                                 tcon->max_bytes_chunk =
1817                                         le32_to_cpu(retbuf->ChunkBytesWritten);
1818                         else
1819                                 goto cchunk_out; /* server gave us bogus size */
1820
1821                         /* No need to change MaxChunks since already set to 1 */
1822                         chunk_sizes_updated = true;
1823                 } else
1824                         goto cchunk_out;
1825         }
1826
1827 cchunk_out:
1828         kfree(pcchunk);
1829         kfree(retbuf);
1830         if (rc)
1831                 return rc;
1832         else
1833                 return total_bytes_written;
1834 }
1835
1836 static int
1837 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
1838                 struct cifs_fid *fid)
1839 {
1840         return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1841 }
1842
1843 static unsigned int
1844 smb2_read_data_offset(char *buf)
1845 {
1846         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1847
1848         return rsp->DataOffset;
1849 }
1850
1851 static unsigned int
1852 smb2_read_data_length(char *buf, bool in_remaining)
1853 {
1854         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1855
1856         if (in_remaining)
1857                 return le32_to_cpu(rsp->DataRemaining);
1858
1859         return le32_to_cpu(rsp->DataLength);
1860 }
1861
1862
1863 static int
1864 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,
1865                struct cifs_io_parms *parms, unsigned int *bytes_read,
1866                char **buf, int *buf_type)
1867 {
1868         parms->persistent_fid = pfid->persistent_fid;
1869         parms->volatile_fid = pfid->volatile_fid;
1870         return SMB2_read(xid, parms, bytes_read, buf, buf_type);
1871 }
1872
1873 static int
1874 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,
1875                 struct cifs_io_parms *parms, unsigned int *written,
1876                 struct kvec *iov, unsigned long nr_segs)
1877 {
1878
1879         parms->persistent_fid = pfid->persistent_fid;
1880         parms->volatile_fid = pfid->volatile_fid;
1881         return SMB2_write(xid, parms, written, iov, nr_segs);
1882 }
1883
1884 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
1885 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
1886                 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
1887 {
1888         struct cifsInodeInfo *cifsi;
1889         int rc;
1890
1891         cifsi = CIFS_I(inode);
1892
1893         /* if file already sparse don't bother setting sparse again */
1894         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
1895                 return true; /* already sparse */
1896
1897         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
1898                 return true; /* already not sparse */
1899
1900         /*
1901          * Can't check for sparse support on share the usual way via the
1902          * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
1903          * since Samba server doesn't set the flag on the share, yet
1904          * supports the set sparse FSCTL and returns sparse correctly
1905          * in the file attributes. If we fail setting sparse though we
1906          * mark that server does not support sparse files for this share
1907          * to avoid repeatedly sending the unsupported fsctl to server
1908          * if the file is repeatedly extended.
1909          */
1910         if (tcon->broken_sparse_sup)
1911                 return false;
1912
1913         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1914                         cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
1915                         &setsparse, 1, CIFSMaxBufSize, NULL, NULL);
1916         if (rc) {
1917                 tcon->broken_sparse_sup = true;
1918                 cifs_dbg(FYI, "set sparse rc = %d\n", rc);
1919                 return false;
1920         }
1921
1922         if (setsparse)
1923                 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
1924         else
1925                 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
1926
1927         return true;
1928 }
1929
1930 static int
1931 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
1932                    struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
1933 {
1934         __le64 eof = cpu_to_le64(size);
1935         struct inode *inode;
1936
1937         /*
1938          * If extending file more than one page make sparse. Many Linux fs
1939          * make files sparse by default when extending via ftruncate
1940          */
1941         inode = d_inode(cfile->dentry);
1942
1943         if (!set_alloc && (size > inode->i_size + 8192)) {
1944                 __u8 set_sparse = 1;
1945
1946                 /* whether set sparse succeeds or not, extend the file */
1947                 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
1948         }
1949
1950         return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
1951                             cfile->fid.volatile_fid, cfile->pid, &eof);
1952 }
1953
1954 static int
1955 smb2_duplicate_extents(const unsigned int xid,
1956                         struct cifsFileInfo *srcfile,
1957                         struct cifsFileInfo *trgtfile, u64 src_off,
1958                         u64 len, u64 dest_off)
1959 {
1960         int rc;
1961         unsigned int ret_data_len;
1962         struct inode *inode;
1963         struct duplicate_extents_to_file dup_ext_buf;
1964         struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink);
1965
1966         /* server fileays advertise duplicate extent support with this flag */
1967         if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) &
1968              FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0)
1969                 return -EOPNOTSUPP;
1970
1971         dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid;
1972         dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid;
1973         dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off);
1974         dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off);
1975         dup_ext_buf.ByteCount = cpu_to_le64(len);
1976         cifs_dbg(FYI, "Duplicate extents: src off %lld dst off %lld len %lld\n",
1977                 src_off, dest_off, len);
1978
1979         inode = d_inode(trgtfile->dentry);
1980         if (inode->i_size < dest_off + len) {
1981                 rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false);
1982                 if (rc)
1983                         goto duplicate_extents_out;
1984
1985                 /*
1986                  * Although also could set plausible allocation size (i_blocks)
1987                  * here in addition to setting the file size, in reflink
1988                  * it is likely that the target file is sparse. Its allocation
1989                  * size will be queried on next revalidate, but it is important
1990                  * to make sure that file's cached size is updated immediately
1991                  */
1992                 cifs_setsize(inode, dest_off + len);
1993         }
1994         rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1995                         trgtfile->fid.volatile_fid,
1996                         FSCTL_DUPLICATE_EXTENTS_TO_FILE,
1997                         (char *)&dup_ext_buf,
1998                         sizeof(struct duplicate_extents_to_file),
1999                         CIFSMaxBufSize, NULL,
2000                         &ret_data_len);
2001
2002         if (ret_data_len > 0)
2003                 cifs_dbg(FYI, "Non-zero response length in duplicate extents\n");
2004
2005 duplicate_extents_out:
2006         return rc;
2007 }
2008
2009 static int
2010 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
2011                    struct cifsFileInfo *cfile)
2012 {
2013         return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
2014                             cfile->fid.volatile_fid);
2015 }
2016
2017 static int
2018 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
2019                    struct cifsFileInfo *cfile)
2020 {
2021         struct fsctl_set_integrity_information_req integr_info;
2022         unsigned int ret_data_len;
2023
2024         integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED);
2025         integr_info.Flags = 0;
2026         integr_info.Reserved = 0;
2027
2028         return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2029                         cfile->fid.volatile_fid,
2030                         FSCTL_SET_INTEGRITY_INFORMATION,
2031                         (char *)&integr_info,
2032                         sizeof(struct fsctl_set_integrity_information_req),
2033                         CIFSMaxBufSize, NULL,
2034                         &ret_data_len);
2035
2036 }
2037
2038 /* GMT Token is @GMT-YYYY.MM.DD-HH.MM.SS Unicode which is 48 bytes + null */
2039 #define GMT_TOKEN_SIZE 50
2040
2041 #define MIN_SNAPSHOT_ARRAY_SIZE 16 /* See MS-SMB2 section 3.3.5.15.1 */
2042
2043 /*
2044  * Input buffer contains (empty) struct smb_snapshot array with size filled in
2045  * For output see struct SRV_SNAPSHOT_ARRAY in MS-SMB2 section 2.2.32.2
2046  */
2047 static int
2048 smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon,
2049                    struct cifsFileInfo *cfile, void __user *ioc_buf)
2050 {
2051         char *retbuf = NULL;
2052         unsigned int ret_data_len = 0;
2053         int rc;
2054         u32 max_response_size;
2055         struct smb_snapshot_array snapshot_in;
2056
2057         /*
2058          * On the first query to enumerate the list of snapshots available
2059          * for this volume the buffer begins with 0 (number of snapshots
2060          * which can be returned is zero since at that point we do not know
2061          * how big the buffer needs to be). On the second query,
2062          * it (ret_data_len) is set to number of snapshots so we can
2063          * know to set the maximum response size larger (see below).
2064          */
2065         if (get_user(ret_data_len, (unsigned int __user *)ioc_buf))
2066                 return -EFAULT;
2067
2068         /*
2069          * Note that for snapshot queries that servers like Azure expect that
2070          * the first query be minimal size (and just used to get the number/size
2071          * of previous versions) so response size must be specified as EXACTLY
2072          * sizeof(struct snapshot_array) which is 16 when rounded up to multiple
2073          * of eight bytes.
2074          */
2075         if (ret_data_len == 0)
2076                 max_response_size = MIN_SNAPSHOT_ARRAY_SIZE;
2077         else
2078                 max_response_size = CIFSMaxBufSize;
2079
2080         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2081                         cfile->fid.volatile_fid,
2082                         FSCTL_SRV_ENUMERATE_SNAPSHOTS,
2083                         NULL, 0 /* no input data */, max_response_size,
2084                         (char **)&retbuf,
2085                         &ret_data_len);
2086         cifs_dbg(FYI, "enum snaphots ioctl returned %d and ret buflen is %d\n",
2087                         rc, ret_data_len);
2088         if (rc)
2089                 return rc;
2090
2091         if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) {
2092                 /* Fixup buffer */
2093                 if (copy_from_user(&snapshot_in, ioc_buf,
2094                     sizeof(struct smb_snapshot_array))) {
2095                         rc = -EFAULT;
2096                         kfree(retbuf);
2097                         return rc;
2098                 }
2099
2100                 /*
2101                  * Check for min size, ie not large enough to fit even one GMT
2102                  * token (snapshot).  On the first ioctl some users may pass in
2103                  * smaller size (or zero) to simply get the size of the array
2104                  * so the user space caller can allocate sufficient memory
2105                  * and retry the ioctl again with larger array size sufficient
2106                  * to hold all of the snapshot GMT tokens on the second try.
2107                  */
2108                 if (snapshot_in.snapshot_array_size < GMT_TOKEN_SIZE)
2109                         ret_data_len = sizeof(struct smb_snapshot_array);
2110
2111                 /*
2112                  * We return struct SRV_SNAPSHOT_ARRAY, followed by
2113                  * the snapshot array (of 50 byte GMT tokens) each
2114                  * representing an available previous version of the data
2115                  */
2116                 if (ret_data_len > (snapshot_in.snapshot_array_size +
2117                                         sizeof(struct smb_snapshot_array)))
2118                         ret_data_len = snapshot_in.snapshot_array_size +
2119                                         sizeof(struct smb_snapshot_array);
2120
2121                 if (copy_to_user(ioc_buf, retbuf, ret_data_len))
2122                         rc = -EFAULT;
2123         }
2124
2125         kfree(retbuf);
2126         return rc;
2127 }
2128
2129
2130
2131 static int
2132 smb3_notify(const unsigned int xid, struct file *pfile,
2133             void __user *ioc_buf, bool return_changes)
2134 {
2135         struct smb3_notify_info notify;
2136         struct smb3_notify_info __user *pnotify_buf;
2137         struct dentry *dentry = pfile->f_path.dentry;
2138         struct inode *inode = file_inode(pfile);
2139         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2140         struct cifs_open_parms oparms;
2141         struct cifs_fid fid;
2142         struct cifs_tcon *tcon;
2143         const unsigned char *path;
2144         char *returned_ioctl_info = NULL;
2145         void *page = alloc_dentry_path();
2146         __le16 *utf16_path = NULL;
2147         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2148         int rc = 0;
2149         __u32 ret_len = 0;
2150
2151         path = build_path_from_dentry(dentry, page);
2152         if (IS_ERR(path)) {
2153                 rc = PTR_ERR(path);
2154                 goto notify_exit;
2155         }
2156
2157         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2158         if (utf16_path == NULL) {
2159                 rc = -ENOMEM;
2160                 goto notify_exit;
2161         }
2162
2163         if (return_changes) {
2164                 if (copy_from_user(&notify, ioc_buf, sizeof(struct smb3_notify_info))) {
2165                         rc = -EFAULT;
2166                         goto notify_exit;
2167                 }
2168         } else {
2169                 if (copy_from_user(&notify, ioc_buf, sizeof(struct smb3_notify))) {
2170                         rc = -EFAULT;
2171                         goto notify_exit;
2172                 }
2173                 notify.data_len = 0;
2174         }
2175
2176         tcon = cifs_sb_master_tcon(cifs_sb);
2177         oparms = (struct cifs_open_parms) {
2178                 .tcon = tcon,
2179                 .path = path,
2180                 .desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA,
2181                 .disposition = FILE_OPEN,
2182                 .create_options = cifs_create_options(cifs_sb, 0),
2183                 .fid = &fid,
2184         };
2185
2186         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,
2187                        NULL);
2188         if (rc)
2189                 goto notify_exit;
2190
2191         rc = SMB2_change_notify(xid, tcon, fid.persistent_fid, fid.volatile_fid,
2192                                 notify.watch_tree, notify.completion_filter,
2193                                 notify.data_len, &returned_ioctl_info, &ret_len);
2194
2195         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2196
2197         cifs_dbg(FYI, "change notify for path %s rc %d\n", path, rc);
2198         if (return_changes && (ret_len > 0) && (notify.data_len > 0)) {
2199                 if (ret_len > notify.data_len)
2200                         ret_len = notify.data_len;
2201                 pnotify_buf = (struct smb3_notify_info __user *)ioc_buf;
2202                 if (copy_to_user(pnotify_buf->notify_data, returned_ioctl_info, ret_len))
2203                         rc = -EFAULT;
2204                 else if (copy_to_user(&pnotify_buf->data_len, &ret_len, sizeof(ret_len)))
2205                         rc = -EFAULT;
2206         }
2207         kfree(returned_ioctl_info);
2208 notify_exit:
2209         free_dentry_path(page);
2210         kfree(utf16_path);
2211         return rc;
2212 }
2213
2214 static int
2215 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
2216                      const char *path, struct cifs_sb_info *cifs_sb,
2217                      struct cifs_fid *fid, __u16 search_flags,
2218                      struct cifs_search_info *srch_inf)
2219 {
2220         __le16 *utf16_path;
2221         struct smb_rqst rqst[2];
2222         struct kvec rsp_iov[2];
2223         int resp_buftype[2];
2224         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
2225         struct kvec qd_iov[SMB2_QUERY_DIRECTORY_IOV_SIZE];
2226         int rc, flags = 0;
2227         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2228         struct cifs_open_parms oparms;
2229         struct smb2_query_directory_rsp *qd_rsp = NULL;
2230         struct smb2_create_rsp *op_rsp = NULL;
2231         struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses);
2232         int retry_count = 0;
2233
2234         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2235         if (!utf16_path)
2236                 return -ENOMEM;
2237
2238         if (smb3_encryption_required(tcon))
2239                 flags |= CIFS_TRANSFORM_REQ;
2240
2241         memset(rqst, 0, sizeof(rqst));
2242         resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER;
2243         memset(rsp_iov, 0, sizeof(rsp_iov));
2244
2245         /* Open */
2246         memset(&open_iov, 0, sizeof(open_iov));
2247         rqst[0].rq_iov = open_iov;
2248         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2249
2250         oparms = (struct cifs_open_parms) {
2251                 .tcon = tcon,
2252                 .path = path,
2253                 .desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA,
2254                 .disposition = FILE_OPEN,
2255                 .create_options = cifs_create_options(cifs_sb, 0),
2256                 .fid = fid,
2257         };
2258
2259         rc = SMB2_open_init(tcon, server,
2260                             &rqst[0], &oplock, &oparms, utf16_path);
2261         if (rc)
2262                 goto qdf_free;
2263         smb2_set_next_command(tcon, &rqst[0]);
2264
2265         /* Query directory */
2266         srch_inf->entries_in_buffer = 0;
2267         srch_inf->index_of_last_entry = 2;
2268
2269         memset(&qd_iov, 0, sizeof(qd_iov));
2270         rqst[1].rq_iov = qd_iov;
2271         rqst[1].rq_nvec = SMB2_QUERY_DIRECTORY_IOV_SIZE;
2272
2273         rc = SMB2_query_directory_init(xid, tcon, server,
2274                                        &rqst[1],
2275                                        COMPOUND_FID, COMPOUND_FID,
2276                                        0, srch_inf->info_level);
2277         if (rc)
2278                 goto qdf_free;
2279
2280         smb2_set_related(&rqst[1]);
2281
2282 again:
2283         rc = compound_send_recv(xid, tcon->ses, server,
2284                                 flags, 2, rqst,
2285                                 resp_buftype, rsp_iov);
2286
2287         if (rc == -EAGAIN && retry_count++ < 10)
2288                 goto again;
2289
2290         /* If the open failed there is nothing to do */
2291         op_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base;
2292         if (op_rsp == NULL || op_rsp->hdr.Status != STATUS_SUCCESS) {
2293                 cifs_dbg(FYI, "query_dir_first: open failed rc=%d\n", rc);
2294                 goto qdf_free;
2295         }
2296         fid->persistent_fid = op_rsp->PersistentFileId;
2297         fid->volatile_fid = op_rsp->VolatileFileId;
2298
2299         /* Anything else than ENODATA means a genuine error */
2300         if (rc && rc != -ENODATA) {
2301                 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
2302                 cifs_dbg(FYI, "query_dir_first: query directory failed rc=%d\n", rc);
2303                 trace_smb3_query_dir_err(xid, fid->persistent_fid,
2304                                          tcon->tid, tcon->ses->Suid, 0, 0, rc);
2305                 goto qdf_free;
2306         }
2307
2308         atomic_inc(&tcon->num_remote_opens);
2309
2310         qd_rsp = (struct smb2_query_directory_rsp *)rsp_iov[1].iov_base;
2311         if (qd_rsp->hdr.Status == STATUS_NO_MORE_FILES) {
2312                 trace_smb3_query_dir_done(xid, fid->persistent_fid,
2313                                           tcon->tid, tcon->ses->Suid, 0, 0);
2314                 srch_inf->endOfSearch = true;
2315                 rc = 0;
2316                 goto qdf_free;
2317         }
2318
2319         rc = smb2_parse_query_directory(tcon, &rsp_iov[1], resp_buftype[1],
2320                                         srch_inf);
2321         if (rc) {
2322                 trace_smb3_query_dir_err(xid, fid->persistent_fid, tcon->tid,
2323                         tcon->ses->Suid, 0, 0, rc);
2324                 goto qdf_free;
2325         }
2326         resp_buftype[1] = CIFS_NO_BUFFER;
2327
2328         trace_smb3_query_dir_done(xid, fid->persistent_fid, tcon->tid,
2329                         tcon->ses->Suid, 0, srch_inf->entries_in_buffer);
2330
2331  qdf_free:
2332         kfree(utf16_path);
2333         SMB2_open_free(&rqst[0]);
2334         SMB2_query_directory_free(&rqst[1]);
2335         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2336         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2337         return rc;
2338 }
2339
2340 static int
2341 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
2342                     struct cifs_fid *fid, __u16 search_flags,
2343                     struct cifs_search_info *srch_inf)
2344 {
2345         return SMB2_query_directory(xid, tcon, fid->persistent_fid,
2346                                     fid->volatile_fid, 0, srch_inf);
2347 }
2348
2349 static int
2350 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
2351                struct cifs_fid *fid)
2352 {
2353         return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
2354 }
2355
2356 /*
2357  * If we negotiate SMB2 protocol and get STATUS_PENDING - update
2358  * the number of credits and return true. Otherwise - return false.
2359  */
2360 static bool
2361 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server)
2362 {
2363         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2364         int scredits, in_flight;
2365
2366         if (shdr->Status != STATUS_PENDING)
2367                 return false;
2368
2369         if (shdr->CreditRequest) {
2370                 spin_lock(&server->req_lock);
2371                 server->credits += le16_to_cpu(shdr->CreditRequest);
2372                 scredits = server->credits;
2373                 in_flight = server->in_flight;
2374                 spin_unlock(&server->req_lock);
2375                 wake_up(&server->request_q);
2376
2377                 trace_smb3_pend_credits(server->CurrentMid,
2378                                 server->conn_id, server->hostname, scredits,
2379                                 le16_to_cpu(shdr->CreditRequest), in_flight);
2380                 cifs_dbg(FYI, "%s: status pending add %u credits total=%d\n",
2381                                 __func__, le16_to_cpu(shdr->CreditRequest), scredits);
2382         }
2383
2384         return true;
2385 }
2386
2387 static bool
2388 smb2_is_session_expired(char *buf)
2389 {
2390         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2391
2392         if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED &&
2393             shdr->Status != STATUS_USER_SESSION_DELETED)
2394                 return false;
2395
2396         trace_smb3_ses_expired(le32_to_cpu(shdr->Id.SyncId.TreeId),
2397                                le64_to_cpu(shdr->SessionId),
2398                                le16_to_cpu(shdr->Command),
2399                                le64_to_cpu(shdr->MessageId));
2400         cifs_dbg(FYI, "Session expired or deleted\n");
2401
2402         return true;
2403 }
2404
2405 static bool
2406 smb2_is_status_io_timeout(char *buf)
2407 {
2408         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2409
2410         if (shdr->Status == STATUS_IO_TIMEOUT)
2411                 return true;
2412         else
2413                 return false;
2414 }
2415
2416 static bool
2417 smb2_is_network_name_deleted(char *buf, struct TCP_Server_Info *server)
2418 {
2419         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2420         struct TCP_Server_Info *pserver;
2421         struct cifs_ses *ses;
2422         struct cifs_tcon *tcon;
2423
2424         if (shdr->Status != STATUS_NETWORK_NAME_DELETED)
2425                 return false;
2426
2427         /* If server is a channel, select the primary channel */
2428         pserver = SERVER_IS_CHAN(server) ? server->primary_server : server;
2429
2430         spin_lock(&cifs_tcp_ses_lock);
2431         list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) {
2432                 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
2433                         if (tcon->tid == le32_to_cpu(shdr->Id.SyncId.TreeId)) {
2434                                 spin_lock(&tcon->tc_lock);
2435                                 tcon->need_reconnect = true;
2436                                 spin_unlock(&tcon->tc_lock);
2437                                 spin_unlock(&cifs_tcp_ses_lock);
2438                                 pr_warn_once("Server share %s deleted.\n",
2439                                              tcon->tree_name);
2440                                 return true;
2441                         }
2442                 }
2443         }
2444         spin_unlock(&cifs_tcp_ses_lock);
2445
2446         return false;
2447 }
2448
2449 static int
2450 smb2_oplock_response(struct cifs_tcon *tcon, __u64 persistent_fid,
2451                 __u64 volatile_fid, __u16 net_fid, struct cifsInodeInfo *cinode)
2452 {
2453         if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
2454                 return SMB2_lease_break(0, tcon, cinode->lease_key,
2455                                         smb2_get_lease_state(cinode));
2456
2457         return SMB2_oplock_break(0, tcon, persistent_fid, volatile_fid,
2458                                  CIFS_CACHE_READ(cinode) ? 1 : 0);
2459 }
2460
2461 void
2462 smb2_set_related(struct smb_rqst *rqst)
2463 {
2464         struct smb2_hdr *shdr;
2465
2466         shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base);
2467         if (shdr == NULL) {
2468                 cifs_dbg(FYI, "shdr NULL in smb2_set_related\n");
2469                 return;
2470         }
2471         shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
2472 }
2473
2474 char smb2_padding[7] = {0, 0, 0, 0, 0, 0, 0};
2475
2476 void
2477 smb2_set_next_command(struct cifs_tcon *tcon, struct smb_rqst *rqst)
2478 {
2479         struct smb2_hdr *shdr;
2480         struct cifs_ses *ses = tcon->ses;
2481         struct TCP_Server_Info *server = ses->server;
2482         unsigned long len = smb_rqst_len(server, rqst);
2483         int i, num_padding;
2484
2485         shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base);
2486         if (shdr == NULL) {
2487                 cifs_dbg(FYI, "shdr NULL in smb2_set_next_command\n");
2488                 return;
2489         }
2490
2491         /* SMB headers in a compound are 8 byte aligned. */
2492
2493         /* No padding needed */
2494         if (!(len & 7))
2495                 goto finished;
2496
2497         num_padding = 8 - (len & 7);
2498         if (!smb3_encryption_required(tcon)) {
2499                 /*
2500                  * If we do not have encryption then we can just add an extra
2501                  * iov for the padding.
2502                  */
2503                 rqst->rq_iov[rqst->rq_nvec].iov_base = smb2_padding;
2504                 rqst->rq_iov[rqst->rq_nvec].iov_len = num_padding;
2505                 rqst->rq_nvec++;
2506                 len += num_padding;
2507         } else {
2508                 /*
2509                  * We can not add a small padding iov for the encryption case
2510                  * because the encryption framework can not handle the padding
2511                  * iovs.
2512                  * We have to flatten this into a single buffer and add
2513                  * the padding to it.
2514                  */
2515                 for (i = 1; i < rqst->rq_nvec; i++) {
2516                         memcpy(rqst->rq_iov[0].iov_base +
2517                                rqst->rq_iov[0].iov_len,
2518                                rqst->rq_iov[i].iov_base,
2519                                rqst->rq_iov[i].iov_len);
2520                         rqst->rq_iov[0].iov_len += rqst->rq_iov[i].iov_len;
2521                 }
2522                 memset(rqst->rq_iov[0].iov_base + rqst->rq_iov[0].iov_len,
2523                        0, num_padding);
2524                 rqst->rq_iov[0].iov_len += num_padding;
2525                 len += num_padding;
2526                 rqst->rq_nvec = 1;
2527         }
2528
2529  finished:
2530         shdr->NextCommand = cpu_to_le32(len);
2531 }
2532
2533 /*
2534  * Passes the query info response back to the caller on success.
2535  * Caller need to free this with free_rsp_buf().
2536  */
2537 int
2538 smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon,
2539                          const char *path, u32 desired_access,
2540                          u32 class, u32 type, u32 output_len,
2541                          struct kvec *rsp, int *buftype,
2542                          struct cifs_sb_info *cifs_sb)
2543 {
2544         struct smb2_compound_vars *vars;
2545         struct cifs_ses *ses = tcon->ses;
2546         struct TCP_Server_Info *server = cifs_pick_channel(ses);
2547         int flags = CIFS_CP_CREATE_CLOSE_OP;
2548         struct smb_rqst *rqst;
2549         int resp_buftype[3];
2550         struct kvec *rsp_iov;
2551         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2552         struct cifs_open_parms oparms;
2553         struct cifs_fid fid;
2554         int rc;
2555         __le16 *utf16_path;
2556         struct cached_fid *cfid = NULL;
2557
2558         if (!path)
2559                 path = "";
2560         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2561         if (!utf16_path)
2562                 return -ENOMEM;
2563
2564         if (smb3_encryption_required(tcon))
2565                 flags |= CIFS_TRANSFORM_REQ;
2566
2567         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
2568         vars = kzalloc(sizeof(*vars), GFP_KERNEL);
2569         if (!vars) {
2570                 rc = -ENOMEM;
2571                 goto out_free_path;
2572         }
2573         rqst = vars->rqst;
2574         rsp_iov = vars->rsp_iov;
2575
2576         /*
2577          * We can only call this for things we know are directories.
2578          */
2579         if (!strcmp(path, ""))
2580                 open_cached_dir(xid, tcon, path, cifs_sb, false,
2581                                 &cfid); /* cfid null if open dir failed */
2582
2583         rqst[0].rq_iov = vars->open_iov;
2584         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2585
2586         oparms = (struct cifs_open_parms) {
2587                 .tcon = tcon,
2588                 .path = path,
2589                 .desired_access = desired_access,
2590                 .disposition = FILE_OPEN,
2591                 .create_options = cifs_create_options(cifs_sb, 0),
2592                 .fid = &fid,
2593         };
2594
2595         rc = SMB2_open_init(tcon, server,
2596                             &rqst[0], &oplock, &oparms, utf16_path);
2597         if (rc)
2598                 goto qic_exit;
2599         smb2_set_next_command(tcon, &rqst[0]);
2600
2601         rqst[1].rq_iov = &vars->qi_iov;
2602         rqst[1].rq_nvec = 1;
2603
2604         if (cfid) {
2605                 rc = SMB2_query_info_init(tcon, server,
2606                                           &rqst[1],
2607                                           cfid->fid.persistent_fid,
2608                                           cfid->fid.volatile_fid,
2609                                           class, type, 0,
2610                                           output_len, 0,
2611                                           NULL);
2612         } else {
2613                 rc = SMB2_query_info_init(tcon, server,
2614                                           &rqst[1],
2615                                           COMPOUND_FID,
2616                                           COMPOUND_FID,
2617                                           class, type, 0,
2618                                           output_len, 0,
2619                                           NULL);
2620         }
2621         if (rc)
2622                 goto qic_exit;
2623         if (!cfid) {
2624                 smb2_set_next_command(tcon, &rqst[1]);
2625                 smb2_set_related(&rqst[1]);
2626         }
2627
2628         rqst[2].rq_iov = &vars->close_iov;
2629         rqst[2].rq_nvec = 1;
2630
2631         rc = SMB2_close_init(tcon, server,
2632                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
2633         if (rc)
2634                 goto qic_exit;
2635         smb2_set_related(&rqst[2]);
2636
2637         if (cfid) {
2638                 rc = compound_send_recv(xid, ses, server,
2639                                         flags, 1, &rqst[1],
2640                                         &resp_buftype[1], &rsp_iov[1]);
2641         } else {
2642                 rc = compound_send_recv(xid, ses, server,
2643                                         flags, 3, rqst,
2644                                         resp_buftype, rsp_iov);
2645         }
2646         if (rc) {
2647                 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2648                 if (rc == -EREMCHG) {
2649                         tcon->need_reconnect = true;
2650                         pr_warn_once("server share %s deleted\n",
2651                                      tcon->tree_name);
2652                 }
2653                 goto qic_exit;
2654         }
2655         *rsp = rsp_iov[1];
2656         *buftype = resp_buftype[1];
2657
2658  qic_exit:
2659         SMB2_open_free(&rqst[0]);
2660         SMB2_query_info_free(&rqst[1]);
2661         SMB2_close_free(&rqst[2]);
2662         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2663         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
2664         if (cfid)
2665                 close_cached_dir(cfid);
2666         kfree(vars);
2667 out_free_path:
2668         kfree(utf16_path);
2669         return rc;
2670 }
2671
2672 static int
2673 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2674              struct cifs_sb_info *cifs_sb, struct kstatfs *buf)
2675 {
2676         struct smb2_query_info_rsp *rsp;
2677         struct smb2_fs_full_size_info *info = NULL;
2678         struct kvec rsp_iov = {NULL, 0};
2679         int buftype = CIFS_NO_BUFFER;
2680         int rc;
2681
2682
2683         rc = smb2_query_info_compound(xid, tcon, "",
2684                                       FILE_READ_ATTRIBUTES,
2685                                       FS_FULL_SIZE_INFORMATION,
2686                                       SMB2_O_INFO_FILESYSTEM,
2687                                       sizeof(struct smb2_fs_full_size_info),
2688                                       &rsp_iov, &buftype, cifs_sb);
2689         if (rc)
2690                 goto qfs_exit;
2691
2692         rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
2693         buf->f_type = SMB2_SUPER_MAGIC;
2694         info = (struct smb2_fs_full_size_info *)(
2695                 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
2696         rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
2697                                le32_to_cpu(rsp->OutputBufferLength),
2698                                &rsp_iov,
2699                                sizeof(struct smb2_fs_full_size_info));
2700         if (!rc)
2701                 smb2_copy_fs_info_to_kstatfs(info, buf);
2702
2703 qfs_exit:
2704         trace_smb3_qfs_done(xid, tcon->tid, tcon->ses->Suid, tcon->tree_name, rc);
2705         free_rsp_buf(buftype, rsp_iov.iov_base);
2706         return rc;
2707 }
2708
2709 static int
2710 smb311_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2711                struct cifs_sb_info *cifs_sb, struct kstatfs *buf)
2712 {
2713         int rc;
2714         __le16 srch_path = 0; /* Null - open root of share */
2715         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2716         struct cifs_open_parms oparms;
2717         struct cifs_fid fid;
2718
2719         if (!tcon->posix_extensions)
2720                 return smb2_queryfs(xid, tcon, cifs_sb, buf);
2721
2722         oparms = (struct cifs_open_parms) {
2723                 .tcon = tcon,
2724                 .path = "",
2725                 .desired_access = FILE_READ_ATTRIBUTES,
2726                 .disposition = FILE_OPEN,
2727                 .create_options = cifs_create_options(cifs_sb, 0),
2728                 .fid = &fid,
2729         };
2730
2731         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
2732                        NULL, NULL);
2733         if (rc)
2734                 return rc;
2735
2736         rc = SMB311_posix_qfs_info(xid, tcon, fid.persistent_fid,
2737                                    fid.volatile_fid, buf);
2738         buf->f_type = SMB2_SUPER_MAGIC;
2739         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2740         return rc;
2741 }
2742
2743 static bool
2744 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
2745 {
2746         return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
2747                ob1->fid.volatile_fid == ob2->fid.volatile_fid;
2748 }
2749
2750 static int
2751 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
2752                __u64 length, __u32 type, int lock, int unlock, bool wait)
2753 {
2754         if (unlock && !lock)
2755                 type = SMB2_LOCKFLAG_UNLOCK;
2756         return SMB2_lock(xid, tlink_tcon(cfile->tlink),
2757                          cfile->fid.persistent_fid, cfile->fid.volatile_fid,
2758                          current->tgid, length, offset, type, wait);
2759 }
2760
2761 static void
2762 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
2763 {
2764         memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
2765 }
2766
2767 static void
2768 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
2769 {
2770         memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
2771 }
2772
2773 static void
2774 smb2_new_lease_key(struct cifs_fid *fid)
2775 {
2776         generate_random_uuid(fid->lease_key);
2777 }
2778
2779 static int
2780 smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,
2781                    const char *search_name,
2782                    struct dfs_info3_param **target_nodes,
2783                    unsigned int *num_of_nodes,
2784                    const struct nls_table *nls_codepage, int remap)
2785 {
2786         int rc;
2787         __le16 *utf16_path = NULL;
2788         int utf16_path_len = 0;
2789         struct cifs_tcon *tcon;
2790         struct fsctl_get_dfs_referral_req *dfs_req = NULL;
2791         struct get_dfs_referral_rsp *dfs_rsp = NULL;
2792         u32 dfs_req_size = 0, dfs_rsp_size = 0;
2793         int retry_count = 0;
2794
2795         cifs_dbg(FYI, "%s: path: %s\n", __func__, search_name);
2796
2797         /*
2798          * Try to use the IPC tcon, otherwise just use any
2799          */
2800         tcon = ses->tcon_ipc;
2801         if (tcon == NULL) {
2802                 spin_lock(&cifs_tcp_ses_lock);
2803                 tcon = list_first_entry_or_null(&ses->tcon_list,
2804                                                 struct cifs_tcon,
2805                                                 tcon_list);
2806                 if (tcon)
2807                         tcon->tc_count++;
2808                 spin_unlock(&cifs_tcp_ses_lock);
2809         }
2810
2811         if (tcon == NULL) {
2812                 cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n",
2813                          ses);
2814                 rc = -ENOTCONN;
2815                 goto out;
2816         }
2817
2818         utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX,
2819                                            &utf16_path_len,
2820                                            nls_codepage, remap);
2821         if (!utf16_path) {
2822                 rc = -ENOMEM;
2823                 goto out;
2824         }
2825
2826         dfs_req_size = sizeof(*dfs_req) + utf16_path_len;
2827         dfs_req = kzalloc(dfs_req_size, GFP_KERNEL);
2828         if (!dfs_req) {
2829                 rc = -ENOMEM;
2830                 goto out;
2831         }
2832
2833         /* Highest DFS referral version understood */
2834         dfs_req->MaxReferralLevel = DFS_VERSION;
2835
2836         /* Path to resolve in an UTF-16 null-terminated string */
2837         memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len);
2838
2839         do {
2840                 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
2841                                 FSCTL_DFS_GET_REFERRALS,
2842                                 (char *)dfs_req, dfs_req_size, CIFSMaxBufSize,
2843                                 (char **)&dfs_rsp, &dfs_rsp_size);
2844                 if (!is_retryable_error(rc))
2845                         break;
2846                 usleep_range(512, 2048);
2847         } while (++retry_count < 5);
2848
2849         if (!rc && !dfs_rsp)
2850                 rc = -EIO;
2851         if (rc) {
2852                 if (!is_retryable_error(rc) && rc != -ENOENT && rc != -EOPNOTSUPP)
2853                         cifs_tcon_dbg(VFS, "%s: ioctl error: rc=%d\n", __func__, rc);
2854                 goto out;
2855         }
2856
2857         rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size,
2858                                  num_of_nodes, target_nodes,
2859                                  nls_codepage, remap, search_name,
2860                                  true /* is_unicode */);
2861         if (rc) {
2862                 cifs_tcon_dbg(VFS, "parse error in %s rc=%d\n", __func__, rc);
2863                 goto out;
2864         }
2865
2866  out:
2867         if (tcon && !tcon->ipc) {
2868                 /* ipc tcons are not refcounted */
2869                 spin_lock(&cifs_tcp_ses_lock);
2870                 tcon->tc_count--;
2871                 /* tc_count can never go negative */
2872                 WARN_ON(tcon->tc_count < 0);
2873                 spin_unlock(&cifs_tcp_ses_lock);
2874         }
2875         kfree(utf16_path);
2876         kfree(dfs_req);
2877         kfree(dfs_rsp);
2878         return rc;
2879 }
2880
2881 /* See MS-FSCC 2.1.2.6 for the 'NFS' style reparse tags */
2882 static int parse_reparse_posix(struct reparse_posix_data *buf,
2883                                struct cifs_sb_info *cifs_sb,
2884                                struct cifs_open_info_data *data)
2885 {
2886         unsigned int len;
2887         u64 type;
2888
2889         switch ((type = le64_to_cpu(buf->InodeType))) {
2890         case NFS_SPECFILE_LNK:
2891                 len = le16_to_cpu(buf->ReparseDataLength);
2892                 data->symlink_target = cifs_strndup_from_utf16(buf->DataBuffer,
2893                                                                len, true,
2894                                                                cifs_sb->local_nls);
2895                 if (!data->symlink_target)
2896                         return -ENOMEM;
2897                 convert_delimiter(data->symlink_target, '/');
2898                 cifs_dbg(FYI, "%s: target path: %s\n",
2899                          __func__, data->symlink_target);
2900                 break;
2901         case NFS_SPECFILE_CHR:
2902         case NFS_SPECFILE_BLK:
2903         case NFS_SPECFILE_FIFO:
2904         case NFS_SPECFILE_SOCK:
2905                 break;
2906         default:
2907                 cifs_dbg(VFS, "%s: unhandled inode type: 0x%llx\n",
2908                          __func__, type);
2909                 return -EOPNOTSUPP;
2910         }
2911         return 0;
2912 }
2913
2914 static int parse_reparse_symlink(struct reparse_symlink_data_buffer *sym,
2915                                  u32 plen, bool unicode,
2916                                  struct cifs_sb_info *cifs_sb,
2917                                  struct cifs_open_info_data *data)
2918 {
2919         unsigned int len;
2920         unsigned int offs;
2921
2922         /* We handle Symbolic Link reparse tag here. See: MS-FSCC 2.1.2.4 */
2923
2924         offs = le16_to_cpu(sym->SubstituteNameOffset);
2925         len = le16_to_cpu(sym->SubstituteNameLength);
2926         if (offs + 20 > plen || offs + len + 20 > plen) {
2927                 cifs_dbg(VFS, "srv returned malformed symlink buffer\n");
2928                 return -EIO;
2929         }
2930
2931         data->symlink_target = cifs_strndup_from_utf16(sym->PathBuffer + offs,
2932                                                        len, unicode,
2933                                                        cifs_sb->local_nls);
2934         if (!data->symlink_target)
2935                 return -ENOMEM;
2936
2937         convert_delimiter(data->symlink_target, '/');
2938         cifs_dbg(FYI, "%s: target path: %s\n", __func__, data->symlink_target);
2939
2940         return 0;
2941 }
2942
2943 int parse_reparse_point(struct reparse_data_buffer *buf,
2944                         u32 plen, struct cifs_sb_info *cifs_sb,
2945                         bool unicode, struct cifs_open_info_data *data)
2946 {
2947         if (plen < sizeof(*buf)) {
2948                 cifs_dbg(VFS, "%s: reparse buffer is too small. Must be at least 8 bytes but was %d\n",
2949                          __func__, plen);
2950                 return -EIO;
2951         }
2952
2953         if (plen < le16_to_cpu(buf->ReparseDataLength) + sizeof(*buf)) {
2954                 cifs_dbg(VFS, "%s: invalid reparse buf length: %d\n",
2955                          __func__, plen);
2956                 return -EIO;
2957         }
2958
2959         data->reparse.buf = buf;
2960
2961         /* See MS-FSCC 2.1.2 */
2962         switch (le32_to_cpu(buf->ReparseTag)) {
2963         case IO_REPARSE_TAG_NFS:
2964                 return parse_reparse_posix((struct reparse_posix_data *)buf,
2965                                            cifs_sb, data);
2966         case IO_REPARSE_TAG_SYMLINK:
2967                 return parse_reparse_symlink(
2968                         (struct reparse_symlink_data_buffer *)buf,
2969                         plen, unicode, cifs_sb, data);
2970         case IO_REPARSE_TAG_LX_SYMLINK:
2971         case IO_REPARSE_TAG_AF_UNIX:
2972         case IO_REPARSE_TAG_LX_FIFO:
2973         case IO_REPARSE_TAG_LX_CHR:
2974         case IO_REPARSE_TAG_LX_BLK:
2975                 return 0;
2976         default:
2977                 cifs_dbg(VFS, "%s: unhandled reparse tag: 0x%08x\n",
2978                          __func__, le32_to_cpu(buf->ReparseTag));
2979                 return -EOPNOTSUPP;
2980         }
2981 }
2982
2983 static int smb2_parse_reparse_point(struct cifs_sb_info *cifs_sb,
2984                                     struct kvec *rsp_iov,
2985                                     struct cifs_open_info_data *data)
2986 {
2987         struct reparse_data_buffer *buf;
2988         struct smb2_ioctl_rsp *io = rsp_iov->iov_base;
2989         u32 plen = le32_to_cpu(io->OutputCount);
2990
2991         buf = (struct reparse_data_buffer *)((u8 *)io +
2992                                              le32_to_cpu(io->OutputOffset));
2993         return parse_reparse_point(buf, plen, cifs_sb, true, data);
2994 }
2995
2996 static int smb2_query_reparse_point(const unsigned int xid,
2997                                     struct cifs_tcon *tcon,
2998                                     struct cifs_sb_info *cifs_sb,
2999                                     const char *full_path,
3000                                     u32 *tag, struct kvec *rsp,
3001                                     int *rsp_buftype)
3002 {
3003         struct smb2_compound_vars *vars;
3004         int rc;
3005         __le16 *utf16_path = NULL;
3006         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3007         struct cifs_open_parms oparms;
3008         struct cifs_fid fid;
3009         struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses);
3010         int flags = CIFS_CP_CREATE_CLOSE_OP;
3011         struct smb_rqst *rqst;
3012         int resp_buftype[3];
3013         struct kvec *rsp_iov;
3014         struct smb2_ioctl_rsp *ioctl_rsp;
3015         struct reparse_data_buffer *reparse_buf;
3016         u32 off, count, len;
3017
3018         cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
3019
3020         if (smb3_encryption_required(tcon))
3021                 flags |= CIFS_TRANSFORM_REQ;
3022
3023         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
3024         if (!utf16_path)
3025                 return -ENOMEM;
3026
3027         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
3028         vars = kzalloc(sizeof(*vars), GFP_KERNEL);
3029         if (!vars) {
3030                 rc = -ENOMEM;
3031                 goto out_free_path;
3032         }
3033         rqst = vars->rqst;
3034         rsp_iov = vars->rsp_iov;
3035
3036         /*
3037          * setup smb2open - TODO add optimization to call cifs_get_readable_path
3038          * to see if there is a handle already open that we can use
3039          */
3040         rqst[0].rq_iov = vars->open_iov;
3041         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
3042
3043         oparms = (struct cifs_open_parms) {
3044                 .tcon = tcon,
3045                 .path = full_path,
3046                 .desired_access = FILE_READ_ATTRIBUTES,
3047                 .disposition = FILE_OPEN,
3048                 .create_options = cifs_create_options(cifs_sb, OPEN_REPARSE_POINT),
3049                 .fid = &fid,
3050         };
3051
3052         rc = SMB2_open_init(tcon, server,
3053                             &rqst[0], &oplock, &oparms, utf16_path);
3054         if (rc)
3055                 goto query_rp_exit;
3056         smb2_set_next_command(tcon, &rqst[0]);
3057
3058
3059         /* IOCTL */
3060         rqst[1].rq_iov = vars->io_iov;
3061         rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
3062
3063         rc = SMB2_ioctl_init(tcon, server,
3064                              &rqst[1], COMPOUND_FID,
3065                              COMPOUND_FID, FSCTL_GET_REPARSE_POINT, NULL, 0,
3066                              CIFSMaxBufSize -
3067                              MAX_SMB2_CREATE_RESPONSE_SIZE -
3068                              MAX_SMB2_CLOSE_RESPONSE_SIZE);
3069         if (rc)
3070                 goto query_rp_exit;
3071
3072         smb2_set_next_command(tcon, &rqst[1]);
3073         smb2_set_related(&rqst[1]);
3074
3075         /* Close */
3076         rqst[2].rq_iov = &vars->close_iov;
3077         rqst[2].rq_nvec = 1;
3078
3079         rc = SMB2_close_init(tcon, server,
3080                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
3081         if (rc)
3082                 goto query_rp_exit;
3083
3084         smb2_set_related(&rqst[2]);
3085
3086         rc = compound_send_recv(xid, tcon->ses, server,
3087                                 flags, 3, rqst,
3088                                 resp_buftype, rsp_iov);
3089
3090         ioctl_rsp = rsp_iov[1].iov_base;
3091
3092         /*
3093          * Open was successful and we got an ioctl response.
3094          */
3095         if (rc == 0) {
3096                 /* See MS-FSCC 2.3.23 */
3097                 off = le32_to_cpu(ioctl_rsp->OutputOffset);
3098                 count = le32_to_cpu(ioctl_rsp->OutputCount);
3099                 if (check_add_overflow(off, count, &len) ||
3100                     len > rsp_iov[1].iov_len) {
3101                         cifs_tcon_dbg(VFS, "%s: invalid ioctl: off=%d count=%d\n",
3102                                       __func__, off, count);
3103                         rc = -EIO;
3104                         goto query_rp_exit;
3105                 }
3106
3107                 reparse_buf = (void *)((u8 *)ioctl_rsp + off);
3108                 len = sizeof(*reparse_buf);
3109                 if (count < len ||
3110                     count < le16_to_cpu(reparse_buf->ReparseDataLength) + len) {
3111                         cifs_tcon_dbg(VFS, "%s: invalid ioctl: off=%d count=%d\n",
3112                                       __func__, off, count);
3113                         rc = -EIO;
3114                         goto query_rp_exit;
3115                 }
3116                 *tag = le32_to_cpu(reparse_buf->ReparseTag);
3117                 *rsp = rsp_iov[1];
3118                 *rsp_buftype = resp_buftype[1];
3119                 resp_buftype[1] = CIFS_NO_BUFFER;
3120         }
3121
3122  query_rp_exit:
3123         SMB2_open_free(&rqst[0]);
3124         SMB2_ioctl_free(&rqst[1]);
3125         SMB2_close_free(&rqst[2]);
3126         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
3127         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
3128         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
3129         kfree(vars);
3130 out_free_path:
3131         kfree(utf16_path);
3132         return rc;
3133 }
3134
3135 static struct cifs_ntsd *
3136 get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb,
3137                     const struct cifs_fid *cifsfid, u32 *pacllen, u32 info)
3138 {
3139         struct cifs_ntsd *pntsd = NULL;
3140         unsigned int xid;
3141         int rc = -EOPNOTSUPP;
3142         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3143
3144         if (IS_ERR(tlink))
3145                 return ERR_CAST(tlink);
3146
3147         xid = get_xid();
3148         cifs_dbg(FYI, "trying to get acl\n");
3149
3150         rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid,
3151                             cifsfid->volatile_fid, (void **)&pntsd, pacllen,
3152                             info);
3153         free_xid(xid);
3154
3155         cifs_put_tlink(tlink);
3156
3157         cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
3158         if (rc)
3159                 return ERR_PTR(rc);
3160         return pntsd;
3161
3162 }
3163
3164 static struct cifs_ntsd *
3165 get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb,
3166                      const char *path, u32 *pacllen, u32 info)
3167 {
3168         struct cifs_ntsd *pntsd = NULL;
3169         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3170         unsigned int xid;
3171         int rc;
3172         struct cifs_tcon *tcon;
3173         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3174         struct cifs_fid fid;
3175         struct cifs_open_parms oparms;
3176         __le16 *utf16_path;
3177
3178         cifs_dbg(FYI, "get smb3 acl for path %s\n", path);
3179         if (IS_ERR(tlink))
3180                 return ERR_CAST(tlink);
3181
3182         tcon = tlink_tcon(tlink);
3183         xid = get_xid();
3184
3185         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
3186         if (!utf16_path) {
3187                 rc = -ENOMEM;
3188                 free_xid(xid);
3189                 return ERR_PTR(rc);
3190         }
3191
3192         oparms = (struct cifs_open_parms) {
3193                 .tcon = tcon,
3194                 .path = path,
3195                 .desired_access = READ_CONTROL,
3196                 .disposition = FILE_OPEN,
3197                 /*
3198                  * When querying an ACL, even if the file is a symlink
3199                  * we want to open the source not the target, and so
3200                  * the protocol requires that the client specify this
3201                  * flag when opening a reparse point
3202                  */
3203                 .create_options = cifs_create_options(cifs_sb, 0) |
3204                                   OPEN_REPARSE_POINT,
3205                 .fid = &fid,
3206         };
3207
3208         if (info & SACL_SECINFO)
3209                 oparms.desired_access |= SYSTEM_SECURITY;
3210
3211         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,
3212                        NULL);
3213         kfree(utf16_path);
3214         if (!rc) {
3215                 rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
3216                                     fid.volatile_fid, (void **)&pntsd, pacllen,
3217                                     info);
3218                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
3219         }
3220
3221         cifs_put_tlink(tlink);
3222         free_xid(xid);
3223
3224         cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
3225         if (rc)
3226                 return ERR_PTR(rc);
3227         return pntsd;
3228 }
3229
3230 static int
3231 set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen,
3232                 struct inode *inode, const char *path, int aclflag)
3233 {
3234         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3235         unsigned int xid;
3236         int rc, access_flags = 0;
3237         struct cifs_tcon *tcon;
3238         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
3239         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3240         struct cifs_fid fid;
3241         struct cifs_open_parms oparms;
3242         __le16 *utf16_path;
3243
3244         cifs_dbg(FYI, "set smb3 acl for path %s\n", path);
3245         if (IS_ERR(tlink))
3246                 return PTR_ERR(tlink);
3247
3248         tcon = tlink_tcon(tlink);
3249         xid = get_xid();
3250
3251         if (aclflag & CIFS_ACL_OWNER || aclflag & CIFS_ACL_GROUP)
3252                 access_flags |= WRITE_OWNER;
3253         if (aclflag & CIFS_ACL_SACL)
3254                 access_flags |= SYSTEM_SECURITY;
3255         if (aclflag & CIFS_ACL_DACL)
3256                 access_flags |= WRITE_DAC;
3257
3258         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
3259         if (!utf16_path) {
3260                 rc = -ENOMEM;
3261                 free_xid(xid);
3262                 return rc;
3263         }
3264
3265         oparms = (struct cifs_open_parms) {
3266                 .tcon = tcon,
3267                 .desired_access = access_flags,
3268                 .create_options = cifs_create_options(cifs_sb, 0),
3269                 .disposition = FILE_OPEN,
3270                 .path = path,
3271                 .fid = &fid,
3272         };
3273
3274         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL,
3275                        NULL, NULL);
3276         kfree(utf16_path);
3277         if (!rc) {
3278                 rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
3279                             fid.volatile_fid, pnntsd, acllen, aclflag);
3280                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
3281         }
3282
3283         cifs_put_tlink(tlink);
3284         free_xid(xid);
3285         return rc;
3286 }
3287
3288 /* Retrieve an ACL from the server */
3289 static struct cifs_ntsd *
3290 get_smb2_acl(struct cifs_sb_info *cifs_sb,
3291              struct inode *inode, const char *path,
3292              u32 *pacllen, u32 info)
3293 {
3294         struct cifs_ntsd *pntsd = NULL;
3295         struct cifsFileInfo *open_file = NULL;
3296
3297         if (inode && !(info & SACL_SECINFO))
3298                 open_file = find_readable_file(CIFS_I(inode), true);
3299         if (!open_file || (info & SACL_SECINFO))
3300                 return get_smb2_acl_by_path(cifs_sb, path, pacllen, info);
3301
3302         pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen, info);
3303         cifsFileInfo_put(open_file);
3304         return pntsd;
3305 }
3306
3307 static long smb3_zero_data(struct file *file, struct cifs_tcon *tcon,
3308                              loff_t offset, loff_t len, unsigned int xid)
3309 {
3310         struct cifsFileInfo *cfile = file->private_data;
3311         struct file_zero_data_information fsctl_buf;
3312
3313         cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
3314
3315         fsctl_buf.FileOffset = cpu_to_le64(offset);
3316         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
3317
3318         return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3319                           cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
3320                           (char *)&fsctl_buf,
3321                           sizeof(struct file_zero_data_information),
3322                           0, NULL, NULL);
3323 }
3324
3325 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
3326                             loff_t offset, loff_t len, bool keep_size)
3327 {
3328         struct cifs_ses *ses = tcon->ses;
3329         struct inode *inode = file_inode(file);
3330         struct cifsInodeInfo *cifsi = CIFS_I(inode);
3331         struct cifsFileInfo *cfile = file->private_data;
3332         unsigned long long new_size;
3333         long rc;
3334         unsigned int xid;
3335         __le64 eof;
3336
3337         xid = get_xid();
3338
3339         trace_smb3_zero_enter(xid, cfile->fid.persistent_fid, tcon->tid,
3340                               ses->Suid, offset, len);
3341
3342         inode_lock(inode);
3343         filemap_invalidate_lock(inode->i_mapping);
3344
3345         /*
3346          * We zero the range through ioctl, so we need remove the page caches
3347          * first, otherwise the data may be inconsistent with the server.
3348          */
3349         truncate_pagecache_range(inode, offset, offset + len - 1);
3350
3351         /* if file not oplocked can't be sure whether asking to extend size */
3352         rc = -EOPNOTSUPP;
3353         if (keep_size == false && !CIFS_CACHE_READ(cifsi))
3354                 goto zero_range_exit;
3355
3356         rc = smb3_zero_data(file, tcon, offset, len, xid);
3357         if (rc < 0)
3358                 goto zero_range_exit;
3359
3360         /*
3361          * do we also need to change the size of the file?
3362          */
3363         new_size = offset + len;
3364         if (keep_size == false && (unsigned long long)i_size_read(inode) < new_size) {
3365                 eof = cpu_to_le64(new_size);
3366                 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3367                                   cfile->fid.volatile_fid, cfile->pid, &eof);
3368                 if (rc >= 0) {
3369                         truncate_setsize(inode, new_size);
3370                         fscache_resize_cookie(cifs_inode_cookie(inode), new_size);
3371                 }
3372         }
3373
3374  zero_range_exit:
3375         filemap_invalidate_unlock(inode->i_mapping);
3376         inode_unlock(inode);
3377         free_xid(xid);
3378         if (rc)
3379                 trace_smb3_zero_err(xid, cfile->fid.persistent_fid, tcon->tid,
3380                               ses->Suid, offset, len, rc);
3381         else
3382                 trace_smb3_zero_done(xid, cfile->fid.persistent_fid, tcon->tid,
3383                               ses->Suid, offset, len);
3384         return rc;
3385 }
3386
3387 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
3388                             loff_t offset, loff_t len)
3389 {
3390         struct inode *inode = file_inode(file);
3391         struct cifsFileInfo *cfile = file->private_data;
3392         struct file_zero_data_information fsctl_buf;
3393         long rc;
3394         unsigned int xid;
3395         __u8 set_sparse = 1;
3396
3397         xid = get_xid();
3398
3399         inode_lock(inode);
3400         /* Need to make file sparse, if not already, before freeing range. */
3401         /* Consider adding equivalent for compressed since it could also work */
3402         if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse)) {
3403                 rc = -EOPNOTSUPP;
3404                 goto out;
3405         }
3406
3407         filemap_invalidate_lock(inode->i_mapping);
3408         /*
3409          * We implement the punch hole through ioctl, so we need remove the page
3410          * caches first, otherwise the data may be inconsistent with the server.
3411          */
3412         truncate_pagecache_range(inode, offset, offset + len - 1);
3413
3414         cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
3415
3416         fsctl_buf.FileOffset = cpu_to_le64(offset);
3417         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
3418
3419         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3420                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
3421                         (char *)&fsctl_buf,
3422                         sizeof(struct file_zero_data_information),
3423                         CIFSMaxBufSize, NULL, NULL);
3424         filemap_invalidate_unlock(inode->i_mapping);
3425 out:
3426         inode_unlock(inode);
3427         free_xid(xid);
3428         return rc;
3429 }
3430
3431 static int smb3_simple_fallocate_write_range(unsigned int xid,
3432                                              struct cifs_tcon *tcon,
3433                                              struct cifsFileInfo *cfile,
3434                                              loff_t off, loff_t len,
3435                                              char *buf)
3436 {
3437         struct cifs_io_parms io_parms = {0};
3438         int nbytes;
3439         int rc = 0;
3440         struct kvec iov[2];
3441
3442         io_parms.netfid = cfile->fid.netfid;
3443         io_parms.pid = current->tgid;
3444         io_parms.tcon = tcon;
3445         io_parms.persistent_fid = cfile->fid.persistent_fid;
3446         io_parms.volatile_fid = cfile->fid.volatile_fid;
3447
3448         while (len) {
3449                 io_parms.offset = off;
3450                 io_parms.length = len;
3451                 if (io_parms.length > SMB2_MAX_BUFFER_SIZE)
3452                         io_parms.length = SMB2_MAX_BUFFER_SIZE;
3453                 /* iov[0] is reserved for smb header */
3454                 iov[1].iov_base = buf;
3455                 iov[1].iov_len = io_parms.length;
3456                 rc = SMB2_write(xid, &io_parms, &nbytes, iov, 1);
3457                 if (rc)
3458                         break;
3459                 if (nbytes > len)
3460                         return -EINVAL;
3461                 buf += nbytes;
3462                 off += nbytes;
3463                 len -= nbytes;
3464         }
3465         return rc;
3466 }
3467
3468 static int smb3_simple_fallocate_range(unsigned int xid,
3469                                        struct cifs_tcon *tcon,
3470                                        struct cifsFileInfo *cfile,
3471                                        loff_t off, loff_t len)
3472 {
3473         struct file_allocated_range_buffer in_data, *out_data = NULL, *tmp_data;
3474         u32 out_data_len;
3475         char *buf = NULL;
3476         loff_t l;
3477         int rc;
3478
3479         in_data.file_offset = cpu_to_le64(off);
3480         in_data.length = cpu_to_le64(len);
3481         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3482                         cfile->fid.volatile_fid,
3483                         FSCTL_QUERY_ALLOCATED_RANGES,
3484                         (char *)&in_data, sizeof(in_data),
3485                         1024 * sizeof(struct file_allocated_range_buffer),
3486                         (char **)&out_data, &out_data_len);
3487         if (rc)
3488                 goto out;
3489
3490         buf = kzalloc(1024 * 1024, GFP_KERNEL);
3491         if (buf == NULL) {
3492                 rc = -ENOMEM;
3493                 goto out;
3494         }
3495
3496         tmp_data = out_data;
3497         while (len) {
3498                 /*
3499                  * The rest of the region is unmapped so write it all.
3500                  */
3501                 if (out_data_len == 0) {
3502                         rc = smb3_simple_fallocate_write_range(xid, tcon,
3503                                                cfile, off, len, buf);
3504                         goto out;
3505                 }
3506
3507                 if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
3508                         rc = -EINVAL;
3509                         goto out;
3510                 }
3511
3512                 if (off < le64_to_cpu(tmp_data->file_offset)) {
3513                         /*
3514                          * We are at a hole. Write until the end of the region
3515                          * or until the next allocated data,
3516                          * whichever comes next.
3517                          */
3518                         l = le64_to_cpu(tmp_data->file_offset) - off;
3519                         if (len < l)
3520                                 l = len;
3521                         rc = smb3_simple_fallocate_write_range(xid, tcon,
3522                                                cfile, off, l, buf);
3523                         if (rc)
3524                                 goto out;
3525                         off = off + l;
3526                         len = len - l;
3527                         if (len == 0)
3528                                 goto out;
3529                 }
3530                 /*
3531                  * We are at a section of allocated data, just skip forward
3532                  * until the end of the data or the end of the region
3533                  * we are supposed to fallocate, whichever comes first.
3534                  */
3535                 l = le64_to_cpu(tmp_data->length);
3536                 if (len < l)
3537                         l = len;
3538                 off += l;
3539                 len -= l;
3540
3541                 tmp_data = &tmp_data[1];
3542                 out_data_len -= sizeof(struct file_allocated_range_buffer);
3543         }
3544
3545  out:
3546         kfree(out_data);
3547         kfree(buf);
3548         return rc;
3549 }
3550
3551
3552 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
3553                             loff_t off, loff_t len, bool keep_size)
3554 {
3555         struct inode *inode;
3556         struct cifsInodeInfo *cifsi;
3557         struct cifsFileInfo *cfile = file->private_data;
3558         long rc = -EOPNOTSUPP;
3559         unsigned int xid;
3560         __le64 eof;
3561
3562         xid = get_xid();
3563
3564         inode = d_inode(cfile->dentry);
3565         cifsi = CIFS_I(inode);
3566
3567         trace_smb3_falloc_enter(xid, cfile->fid.persistent_fid, tcon->tid,
3568                                 tcon->ses->Suid, off, len);
3569         /* if file not oplocked can't be sure whether asking to extend size */
3570         if (!CIFS_CACHE_READ(cifsi))
3571                 if (keep_size == false) {
3572                         trace_smb3_falloc_err(xid, cfile->fid.persistent_fid,
3573                                 tcon->tid, tcon->ses->Suid, off, len, rc);
3574                         free_xid(xid);
3575                         return rc;
3576                 }
3577
3578         /*
3579          * Extending the file
3580          */
3581         if ((keep_size == false) && i_size_read(inode) < off + len) {
3582                 rc = inode_newsize_ok(inode, off + len);
3583                 if (rc)
3584                         goto out;
3585
3586                 if (cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)
3587                         smb2_set_sparse(xid, tcon, cfile, inode, false);
3588
3589                 eof = cpu_to_le64(off + len);
3590                 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3591                                   cfile->fid.volatile_fid, cfile->pid, &eof);
3592                 if (rc == 0) {
3593                         cifsi->server_eof = off + len;
3594                         cifs_setsize(inode, off + len);
3595                         cifs_truncate_page(inode->i_mapping, inode->i_size);
3596                         truncate_setsize(inode, off + len);
3597                 }
3598                 goto out;
3599         }
3600
3601         /*
3602          * Files are non-sparse by default so falloc may be a no-op
3603          * Must check if file sparse. If not sparse, and since we are not
3604          * extending then no need to do anything since file already allocated
3605          */
3606         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
3607                 rc = 0;
3608                 goto out;
3609         }
3610
3611         if (keep_size == true) {
3612                 /*
3613                  * We can not preallocate pages beyond the end of the file
3614                  * in SMB2
3615                  */
3616                 if (off >= i_size_read(inode)) {
3617                         rc = 0;
3618                         goto out;
3619                 }
3620                 /*
3621                  * For fallocates that are partially beyond the end of file,
3622                  * clamp len so we only fallocate up to the end of file.
3623                  */
3624                 if (off + len > i_size_read(inode)) {
3625                         len = i_size_read(inode) - off;
3626                 }
3627         }
3628
3629         if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
3630                 /*
3631                  * At this point, we are trying to fallocate an internal
3632                  * regions of a sparse file. Since smb2 does not have a
3633                  * fallocate command we have two otions on how to emulate this.
3634                  * We can either turn the entire file to become non-sparse
3635                  * which we only do if the fallocate is for virtually
3636                  * the whole file,  or we can overwrite the region with zeroes
3637                  * using SMB2_write, which could be prohibitevly expensive
3638                  * if len is large.
3639                  */
3640                 /*
3641                  * We are only trying to fallocate a small region so
3642                  * just write it with zero.
3643                  */
3644                 if (len <= 1024 * 1024) {
3645                         rc = smb3_simple_fallocate_range(xid, tcon, cfile,
3646                                                          off, len);
3647                         goto out;
3648                 }
3649
3650                 /*
3651                  * Check if falloc starts within first few pages of file
3652                  * and ends within a few pages of the end of file to
3653                  * ensure that most of file is being forced to be
3654                  * fallocated now. If so then setting whole file sparse
3655                  * ie potentially making a few extra pages at the beginning
3656                  * or end of the file non-sparse via set_sparse is harmless.
3657                  */
3658                 if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) {
3659                         rc = -EOPNOTSUPP;
3660                         goto out;
3661                 }
3662         }
3663
3664         smb2_set_sparse(xid, tcon, cfile, inode, false);
3665         rc = 0;
3666
3667 out:
3668         if (rc)
3669                 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, tcon->tid,
3670                                 tcon->ses->Suid, off, len, rc);
3671         else
3672                 trace_smb3_falloc_done(xid, cfile->fid.persistent_fid, tcon->tid,
3673                                 tcon->ses->Suid, off, len);
3674
3675         free_xid(xid);
3676         return rc;
3677 }
3678
3679 static long smb3_collapse_range(struct file *file, struct cifs_tcon *tcon,
3680                             loff_t off, loff_t len)
3681 {
3682         int rc;
3683         unsigned int xid;
3684         struct inode *inode = file_inode(file);
3685         struct cifsFileInfo *cfile = file->private_data;
3686         struct cifsInodeInfo *cifsi = CIFS_I(inode);
3687         __le64 eof;
3688         loff_t old_eof;
3689
3690         xid = get_xid();
3691
3692         inode_lock(inode);
3693
3694         old_eof = i_size_read(inode);
3695         if ((off >= old_eof) ||
3696             off + len >= old_eof) {
3697                 rc = -EINVAL;
3698                 goto out;
3699         }
3700
3701         filemap_invalidate_lock(inode->i_mapping);
3702         rc = filemap_write_and_wait_range(inode->i_mapping, off, old_eof - 1);
3703         if (rc < 0)
3704                 goto out_2;
3705
3706         truncate_pagecache_range(inode, off, old_eof);
3707
3708         rc = smb2_copychunk_range(xid, cfile, cfile, off + len,
3709                                   old_eof - off - len, off);
3710         if (rc < 0)
3711                 goto out_2;
3712
3713         eof = cpu_to_le64(old_eof - len);
3714         rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3715                           cfile->fid.volatile_fid, cfile->pid, &eof);
3716         if (rc < 0)
3717                 goto out_2;
3718
3719         rc = 0;
3720
3721         cifsi->server_eof = i_size_read(inode) - len;
3722         truncate_setsize(inode, cifsi->server_eof);
3723         fscache_resize_cookie(cifs_inode_cookie(inode), cifsi->server_eof);
3724 out_2:
3725         filemap_invalidate_unlock(inode->i_mapping);
3726  out:
3727         inode_unlock(inode);
3728         free_xid(xid);
3729         return rc;
3730 }
3731
3732 static long smb3_insert_range(struct file *file, struct cifs_tcon *tcon,
3733                               loff_t off, loff_t len)
3734 {
3735         int rc;
3736         unsigned int xid;
3737         struct cifsFileInfo *cfile = file->private_data;
3738         struct inode *inode = file_inode(file);
3739         __le64 eof;
3740         __u64  count, old_eof;
3741
3742         xid = get_xid();
3743
3744         inode_lock(inode);
3745
3746         old_eof = i_size_read(inode);
3747         if (off >= old_eof) {
3748                 rc = -EINVAL;
3749                 goto out;
3750         }
3751
3752         count = old_eof - off;
3753         eof = cpu_to_le64(old_eof + len);
3754
3755         filemap_invalidate_lock(inode->i_mapping);
3756         rc = filemap_write_and_wait_range(inode->i_mapping, off, old_eof + len - 1);
3757         if (rc < 0)
3758                 goto out_2;
3759         truncate_pagecache_range(inode, off, old_eof);
3760
3761         rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3762                           cfile->fid.volatile_fid, cfile->pid, &eof);
3763         if (rc < 0)
3764                 goto out_2;
3765
3766         truncate_setsize(inode, old_eof + len);
3767         fscache_resize_cookie(cifs_inode_cookie(inode), i_size_read(inode));
3768
3769         rc = smb2_copychunk_range(xid, cfile, cfile, off, count, off + len);
3770         if (rc < 0)
3771                 goto out_2;
3772
3773         rc = smb3_zero_data(file, tcon, off, len, xid);
3774         if (rc < 0)
3775                 goto out_2;
3776
3777         rc = 0;
3778 out_2:
3779         filemap_invalidate_unlock(inode->i_mapping);
3780  out:
3781         inode_unlock(inode);
3782         free_xid(xid);
3783         return rc;
3784 }
3785
3786 static loff_t smb3_llseek(struct file *file, struct cifs_tcon *tcon, loff_t offset, int whence)
3787 {
3788         struct cifsFileInfo *wrcfile, *cfile = file->private_data;
3789         struct cifsInodeInfo *cifsi;
3790         struct inode *inode;
3791         int rc = 0;
3792         struct file_allocated_range_buffer in_data, *out_data = NULL;
3793         u32 out_data_len;
3794         unsigned int xid;
3795
3796         if (whence != SEEK_HOLE && whence != SEEK_DATA)
3797                 return generic_file_llseek(file, offset, whence);
3798
3799         inode = d_inode(cfile->dentry);
3800         cifsi = CIFS_I(inode);
3801
3802         if (offset < 0 || offset >= i_size_read(inode))
3803                 return -ENXIO;
3804
3805         xid = get_xid();
3806         /*
3807          * We need to be sure that all dirty pages are written as they
3808          * might fill holes on the server.
3809          * Note that we also MUST flush any written pages since at least
3810          * some servers (Windows2016) will not reflect recent writes in
3811          * QUERY_ALLOCATED_RANGES until SMB2_flush is called.
3812          */
3813         wrcfile = find_writable_file(cifsi, FIND_WR_ANY);
3814         if (wrcfile) {
3815                 filemap_write_and_wait(inode->i_mapping);
3816                 smb2_flush_file(xid, tcon, &wrcfile->fid);
3817                 cifsFileInfo_put(wrcfile);
3818         }
3819
3820         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) {
3821                 if (whence == SEEK_HOLE)
3822                         offset = i_size_read(inode);
3823                 goto lseek_exit;
3824         }
3825
3826         in_data.file_offset = cpu_to_le64(offset);
3827         in_data.length = cpu_to_le64(i_size_read(inode));
3828
3829         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3830                         cfile->fid.volatile_fid,
3831                         FSCTL_QUERY_ALLOCATED_RANGES,
3832                         (char *)&in_data, sizeof(in_data),
3833                         sizeof(struct file_allocated_range_buffer),
3834                         (char **)&out_data, &out_data_len);
3835         if (rc == -E2BIG)
3836                 rc = 0;
3837         if (rc)
3838                 goto lseek_exit;
3839
3840         if (whence == SEEK_HOLE && out_data_len == 0)
3841                 goto lseek_exit;
3842
3843         if (whence == SEEK_DATA && out_data_len == 0) {
3844                 rc = -ENXIO;
3845                 goto lseek_exit;
3846         }
3847
3848         if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
3849                 rc = -EINVAL;
3850                 goto lseek_exit;
3851         }
3852         if (whence == SEEK_DATA) {
3853                 offset = le64_to_cpu(out_data->file_offset);
3854                 goto lseek_exit;
3855         }
3856         if (offset < le64_to_cpu(out_data->file_offset))
3857                 goto lseek_exit;
3858
3859         offset = le64_to_cpu(out_data->file_offset) + le64_to_cpu(out_data->length);
3860
3861  lseek_exit:
3862         free_xid(xid);
3863         kfree(out_data);
3864         if (!rc)
3865                 return vfs_setpos(file, offset, inode->i_sb->s_maxbytes);
3866         else
3867                 return rc;
3868 }
3869
3870 static int smb3_fiemap(struct cifs_tcon *tcon,
3871                        struct cifsFileInfo *cfile,
3872                        struct fiemap_extent_info *fei, u64 start, u64 len)
3873 {
3874         unsigned int xid;
3875         struct file_allocated_range_buffer in_data, *out_data;
3876         u32 out_data_len;
3877         int i, num, rc, flags, last_blob;
3878         u64 next;
3879
3880         rc = fiemap_prep(d_inode(cfile->dentry), fei, start, &len, 0);
3881         if (rc)
3882                 return rc;
3883
3884         xid = get_xid();
3885  again:
3886         in_data.file_offset = cpu_to_le64(start);
3887         in_data.length = cpu_to_le64(len);
3888
3889         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3890                         cfile->fid.volatile_fid,
3891                         FSCTL_QUERY_ALLOCATED_RANGES,
3892                         (char *)&in_data, sizeof(in_data),
3893                         1024 * sizeof(struct file_allocated_range_buffer),
3894                         (char **)&out_data, &out_data_len);
3895         if (rc == -E2BIG) {
3896                 last_blob = 0;
3897                 rc = 0;
3898         } else
3899                 last_blob = 1;
3900         if (rc)
3901                 goto out;
3902
3903         if (out_data_len && out_data_len < sizeof(struct file_allocated_range_buffer)) {
3904                 rc = -EINVAL;
3905                 goto out;
3906         }
3907         if (out_data_len % sizeof(struct file_allocated_range_buffer)) {
3908                 rc = -EINVAL;
3909                 goto out;
3910         }
3911
3912         num = out_data_len / sizeof(struct file_allocated_range_buffer);
3913         for (i = 0; i < num; i++) {
3914                 flags = 0;
3915                 if (i == num - 1 && last_blob)
3916                         flags |= FIEMAP_EXTENT_LAST;
3917
3918                 rc = fiemap_fill_next_extent(fei,
3919                                 le64_to_cpu(out_data[i].file_offset),
3920                                 le64_to_cpu(out_data[i].file_offset),
3921                                 le64_to_cpu(out_data[i].length),
3922                                 flags);
3923                 if (rc < 0)
3924                         goto out;
3925                 if (rc == 1) {
3926                         rc = 0;
3927                         goto out;
3928                 }
3929         }
3930
3931         if (!last_blob) {
3932                 next = le64_to_cpu(out_data[num - 1].file_offset) +
3933                   le64_to_cpu(out_data[num - 1].length);
3934                 len = len - (next - start);
3935                 start = next;
3936                 goto again;
3937         }
3938
3939  out:
3940         free_xid(xid);
3941         kfree(out_data);
3942         return rc;
3943 }
3944
3945 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
3946                            loff_t off, loff_t len)
3947 {
3948         /* KEEP_SIZE already checked for by do_fallocate */
3949         if (mode & FALLOC_FL_PUNCH_HOLE)
3950                 return smb3_punch_hole(file, tcon, off, len);
3951         else if (mode & FALLOC_FL_ZERO_RANGE) {
3952                 if (mode & FALLOC_FL_KEEP_SIZE)
3953                         return smb3_zero_range(file, tcon, off, len, true);
3954                 return smb3_zero_range(file, tcon, off, len, false);
3955         } else if (mode == FALLOC_FL_KEEP_SIZE)
3956                 return smb3_simple_falloc(file, tcon, off, len, true);
3957         else if (mode == FALLOC_FL_COLLAPSE_RANGE)
3958                 return smb3_collapse_range(file, tcon, off, len);
3959         else if (mode == FALLOC_FL_INSERT_RANGE)
3960                 return smb3_insert_range(file, tcon, off, len);
3961         else if (mode == 0)
3962                 return smb3_simple_falloc(file, tcon, off, len, false);
3963
3964         return -EOPNOTSUPP;
3965 }
3966
3967 static void
3968 smb2_downgrade_oplock(struct TCP_Server_Info *server,
3969                       struct cifsInodeInfo *cinode, __u32 oplock,
3970                       unsigned int epoch, bool *purge_cache)
3971 {
3972         server->ops->set_oplock_level(cinode, oplock, 0, NULL);
3973 }
3974
3975 static void
3976 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3977                        unsigned int epoch, bool *purge_cache);
3978
3979 static void
3980 smb3_downgrade_oplock(struct TCP_Server_Info *server,
3981                        struct cifsInodeInfo *cinode, __u32 oplock,
3982                        unsigned int epoch, bool *purge_cache)
3983 {
3984         unsigned int old_state = cinode->oplock;
3985         unsigned int old_epoch = cinode->epoch;
3986         unsigned int new_state;
3987
3988         if (epoch > old_epoch) {
3989                 smb21_set_oplock_level(cinode, oplock, 0, NULL);
3990                 cinode->epoch = epoch;
3991         }
3992
3993         new_state = cinode->oplock;
3994         *purge_cache = false;
3995
3996         if ((old_state & CIFS_CACHE_READ_FLG) != 0 &&
3997             (new_state & CIFS_CACHE_READ_FLG) == 0)
3998                 *purge_cache = true;
3999         else if (old_state == new_state && (epoch - old_epoch > 1))
4000                 *purge_cache = true;
4001 }
4002
4003 static void
4004 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
4005                       unsigned int epoch, bool *purge_cache)
4006 {
4007         oplock &= 0xFF;
4008         cinode->lease_granted = false;
4009         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
4010                 return;
4011         if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
4012                 cinode->oplock = CIFS_CACHE_RHW_FLG;
4013                 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
4014                          &cinode->netfs.inode);
4015         } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
4016                 cinode->oplock = CIFS_CACHE_RW_FLG;
4017                 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
4018                          &cinode->netfs.inode);
4019         } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
4020                 cinode->oplock = CIFS_CACHE_READ_FLG;
4021                 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
4022                          &cinode->netfs.inode);
4023         } else
4024                 cinode->oplock = 0;
4025 }
4026
4027 static void
4028 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
4029                        unsigned int epoch, bool *purge_cache)
4030 {
4031         char message[5] = {0};
4032         unsigned int new_oplock = 0;
4033
4034         oplock &= 0xFF;
4035         cinode->lease_granted = true;
4036         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
4037                 return;
4038
4039         /* Check if the server granted an oplock rather than a lease */
4040         if (oplock & SMB2_OPLOCK_LEVEL_EXCLUSIVE)
4041                 return smb2_set_oplock_level(cinode, oplock, epoch,
4042                                              purge_cache);
4043
4044         if (oplock & SMB2_LEASE_READ_CACHING_HE) {
4045                 new_oplock |= CIFS_CACHE_READ_FLG;
4046                 strcat(message, "R");
4047         }
4048         if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
4049                 new_oplock |= CIFS_CACHE_HANDLE_FLG;
4050                 strcat(message, "H");
4051         }
4052         if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
4053                 new_oplock |= CIFS_CACHE_WRITE_FLG;
4054                 strcat(message, "W");
4055         }
4056         if (!new_oplock)
4057                 strncpy(message, "None", sizeof(message));
4058
4059         cinode->oplock = new_oplock;
4060         cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
4061                  &cinode->netfs.inode);
4062 }
4063
4064 static void
4065 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
4066                       unsigned int epoch, bool *purge_cache)
4067 {
4068         unsigned int old_oplock = cinode->oplock;
4069
4070         smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
4071
4072         if (purge_cache) {
4073                 *purge_cache = false;
4074                 if (old_oplock == CIFS_CACHE_READ_FLG) {
4075                         if (cinode->oplock == CIFS_CACHE_READ_FLG &&
4076                             (epoch - cinode->epoch > 0))
4077                                 *purge_cache = true;
4078                         else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
4079                                  (epoch - cinode->epoch > 1))
4080                                 *purge_cache = true;
4081                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
4082                                  (epoch - cinode->epoch > 1))
4083                                 *purge_cache = true;
4084                         else if (cinode->oplock == 0 &&
4085                                  (epoch - cinode->epoch > 0))
4086                                 *purge_cache = true;
4087                 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
4088                         if (cinode->oplock == CIFS_CACHE_RH_FLG &&
4089                             (epoch - cinode->epoch > 0))
4090                                 *purge_cache = true;
4091                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
4092                                  (epoch - cinode->epoch > 1))
4093                                 *purge_cache = true;
4094                 }
4095                 cinode->epoch = epoch;
4096         }
4097 }
4098
4099 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
4100 static bool
4101 smb2_is_read_op(__u32 oplock)
4102 {
4103         return oplock == SMB2_OPLOCK_LEVEL_II;
4104 }
4105 #endif /* CIFS_ALLOW_INSECURE_LEGACY */
4106
4107 static bool
4108 smb21_is_read_op(__u32 oplock)
4109 {
4110         return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
4111                !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
4112 }
4113
4114 static __le32
4115 map_oplock_to_lease(u8 oplock)
4116 {
4117         if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
4118                 return SMB2_LEASE_WRITE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE;
4119         else if (oplock == SMB2_OPLOCK_LEVEL_II)
4120                 return SMB2_LEASE_READ_CACHING_LE;
4121         else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
4122                 return SMB2_LEASE_HANDLE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE |
4123                        SMB2_LEASE_WRITE_CACHING_LE;
4124         return 0;
4125 }
4126
4127 static char *
4128 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
4129 {
4130         struct create_lease *buf;
4131
4132         buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
4133         if (!buf)
4134                 return NULL;
4135
4136         memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
4137         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
4138
4139         buf->ccontext.DataOffset = cpu_to_le16(offsetof
4140                                         (struct create_lease, lcontext));
4141         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
4142         buf->ccontext.NameOffset = cpu_to_le16(offsetof
4143                                 (struct create_lease, Name));
4144         buf->ccontext.NameLength = cpu_to_le16(4);
4145         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
4146         buf->Name[0] = 'R';
4147         buf->Name[1] = 'q';
4148         buf->Name[2] = 'L';
4149         buf->Name[3] = 's';
4150         return (char *)buf;
4151 }
4152
4153 static char *
4154 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
4155 {
4156         struct create_lease_v2 *buf;
4157
4158         buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
4159         if (!buf)
4160                 return NULL;
4161
4162         memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
4163         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
4164
4165         buf->ccontext.DataOffset = cpu_to_le16(offsetof
4166                                         (struct create_lease_v2, lcontext));
4167         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
4168         buf->ccontext.NameOffset = cpu_to_le16(offsetof
4169                                 (struct create_lease_v2, Name));
4170         buf->ccontext.NameLength = cpu_to_le16(4);
4171         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
4172         buf->Name[0] = 'R';
4173         buf->Name[1] = 'q';
4174         buf->Name[2] = 'L';
4175         buf->Name[3] = 's';
4176         return (char *)buf;
4177 }
4178
4179 static __u8
4180 smb2_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
4181 {
4182         struct create_lease *lc = (struct create_lease *)buf;
4183
4184         *epoch = 0; /* not used */
4185         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE)
4186                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
4187         return le32_to_cpu(lc->lcontext.LeaseState);
4188 }
4189
4190 static __u8
4191 smb3_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
4192 {
4193         struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
4194
4195         *epoch = le16_to_cpu(lc->lcontext.Epoch);
4196         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE)
4197                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
4198         if (lease_key)
4199                 memcpy(lease_key, &lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE);
4200         return le32_to_cpu(lc->lcontext.LeaseState);
4201 }
4202
4203 static unsigned int
4204 smb2_wp_retry_size(struct inode *inode)
4205 {
4206         return min_t(unsigned int, CIFS_SB(inode->i_sb)->ctx->wsize,
4207                      SMB2_MAX_BUFFER_SIZE);
4208 }
4209
4210 static bool
4211 smb2_dir_needs_close(struct cifsFileInfo *cfile)
4212 {
4213         return !cfile->invalidHandle;
4214 }
4215
4216 static void
4217 fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len,
4218                    struct smb_rqst *old_rq, __le16 cipher_type)
4219 {
4220         struct smb2_hdr *shdr =
4221                         (struct smb2_hdr *)old_rq->rq_iov[0].iov_base;
4222
4223         memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr));
4224         tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
4225         tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
4226         tr_hdr->Flags = cpu_to_le16(0x01);
4227         if ((cipher_type == SMB2_ENCRYPTION_AES128_GCM) ||
4228             (cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4229                 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
4230         else
4231                 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
4232         memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8);
4233 }
4234
4235 static void *smb2_aead_req_alloc(struct crypto_aead *tfm, const struct smb_rqst *rqst,
4236                                  int num_rqst, const u8 *sig, u8 **iv,
4237                                  struct aead_request **req, struct sg_table *sgt,
4238                                  unsigned int *num_sgs, size_t *sensitive_size)
4239 {
4240         unsigned int req_size = sizeof(**req) + crypto_aead_reqsize(tfm);
4241         unsigned int iv_size = crypto_aead_ivsize(tfm);
4242         unsigned int len;
4243         u8 *p;
4244
4245         *num_sgs = cifs_get_num_sgs(rqst, num_rqst, sig);
4246         if (IS_ERR_VALUE((long)(int)*num_sgs))
4247                 return ERR_PTR(*num_sgs);
4248
4249         len = iv_size;
4250         len += crypto_aead_alignmask(tfm) & ~(crypto_tfm_ctx_alignment() - 1);
4251         len = ALIGN(len, crypto_tfm_ctx_alignment());
4252         len += req_size;
4253         len = ALIGN(len, __alignof__(struct scatterlist));
4254         len += array_size(*num_sgs, sizeof(struct scatterlist));
4255         *sensitive_size = len;
4256
4257         p = kvzalloc(len, GFP_NOFS);
4258         if (!p)
4259                 return ERR_PTR(-ENOMEM);
4260
4261         *iv = (u8 *)PTR_ALIGN(p, crypto_aead_alignmask(tfm) + 1);
4262         *req = (struct aead_request *)PTR_ALIGN(*iv + iv_size,
4263                                                 crypto_tfm_ctx_alignment());
4264         sgt->sgl = (struct scatterlist *)PTR_ALIGN((u8 *)*req + req_size,
4265                                                    __alignof__(struct scatterlist));
4266         return p;
4267 }
4268
4269 static void *smb2_get_aead_req(struct crypto_aead *tfm, struct smb_rqst *rqst,
4270                                int num_rqst, const u8 *sig, u8 **iv,
4271                                struct aead_request **req, struct scatterlist **sgl,
4272                                size_t *sensitive_size)
4273 {
4274         struct sg_table sgtable = {};
4275         unsigned int skip, num_sgs, i, j;
4276         ssize_t rc;
4277         void *p;
4278
4279         p = smb2_aead_req_alloc(tfm, rqst, num_rqst, sig, iv, req, &sgtable,
4280                                 &num_sgs, sensitive_size);
4281         if (IS_ERR(p))
4282                 return ERR_CAST(p);
4283
4284         sg_init_marker(sgtable.sgl, num_sgs);
4285
4286         /*
4287          * The first rqst has a transform header where the
4288          * first 20 bytes are not part of the encrypted blob.
4289          */
4290         skip = 20;
4291
4292         for (i = 0; i < num_rqst; i++) {
4293                 struct iov_iter *iter = &rqst[i].rq_iter;
4294                 size_t count = iov_iter_count(iter);
4295
4296                 for (j = 0; j < rqst[i].rq_nvec; j++) {
4297                         cifs_sg_set_buf(&sgtable,
4298                                         rqst[i].rq_iov[j].iov_base + skip,
4299                                         rqst[i].rq_iov[j].iov_len - skip);
4300
4301                         /* See the above comment on the 'skip' assignment */
4302                         skip = 0;
4303                 }
4304                 sgtable.orig_nents = sgtable.nents;
4305
4306                 rc = extract_iter_to_sg(iter, count, &sgtable,
4307                                         num_sgs - sgtable.nents, 0);
4308                 iov_iter_revert(iter, rc);
4309                 sgtable.orig_nents = sgtable.nents;
4310         }
4311
4312         cifs_sg_set_buf(&sgtable, sig, SMB2_SIGNATURE_SIZE);
4313         sg_mark_end(&sgtable.sgl[sgtable.nents - 1]);
4314         *sgl = sgtable.sgl;
4315         return p;
4316 }
4317
4318 static int
4319 smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key)
4320 {
4321         struct TCP_Server_Info *pserver;
4322         struct cifs_ses *ses;
4323         u8 *ses_enc_key;
4324
4325         /* If server is a channel, select the primary channel */
4326         pserver = SERVER_IS_CHAN(server) ? server->primary_server : server;
4327
4328         spin_lock(&cifs_tcp_ses_lock);
4329         list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) {
4330                 if (ses->Suid == ses_id) {
4331                         spin_lock(&ses->ses_lock);
4332                         ses_enc_key = enc ? ses->smb3encryptionkey :
4333                                 ses->smb3decryptionkey;
4334                         memcpy(key, ses_enc_key, SMB3_ENC_DEC_KEY_SIZE);
4335                         spin_unlock(&ses->ses_lock);
4336                         spin_unlock(&cifs_tcp_ses_lock);
4337                         return 0;
4338                 }
4339         }
4340         spin_unlock(&cifs_tcp_ses_lock);
4341
4342         trace_smb3_ses_not_found(ses_id);
4343
4344         return -EAGAIN;
4345 }
4346 /*
4347  * Encrypt or decrypt @rqst message. @rqst[0] has the following format:
4348  * iov[0]   - transform header (associate data),
4349  * iov[1-N] - SMB2 header and pages - data to encrypt.
4350  * On success return encrypted data in iov[1-N] and pages, leave iov[0]
4351  * untouched.
4352  */
4353 static int
4354 crypt_message(struct TCP_Server_Info *server, int num_rqst,
4355               struct smb_rqst *rqst, int enc)
4356 {
4357         struct smb2_transform_hdr *tr_hdr =
4358                 (struct smb2_transform_hdr *)rqst[0].rq_iov[0].iov_base;
4359         unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20;
4360         int rc = 0;
4361         struct scatterlist *sg;
4362         u8 sign[SMB2_SIGNATURE_SIZE] = {};
4363         u8 key[SMB3_ENC_DEC_KEY_SIZE];
4364         struct aead_request *req;
4365         u8 *iv;
4366         DECLARE_CRYPTO_WAIT(wait);
4367         struct crypto_aead *tfm;
4368         unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
4369         void *creq;
4370         size_t sensitive_size;
4371
4372         rc = smb2_get_enc_key(server, le64_to_cpu(tr_hdr->SessionId), enc, key);
4373         if (rc) {
4374                 cifs_server_dbg(FYI, "%s: Could not get %scryption key. sid: 0x%llx\n", __func__,
4375                          enc ? "en" : "de", le64_to_cpu(tr_hdr->SessionId));
4376                 return rc;
4377         }
4378
4379         rc = smb3_crypto_aead_allocate(server);
4380         if (rc) {
4381                 cifs_server_dbg(VFS, "%s: crypto alloc failed\n", __func__);
4382                 return rc;
4383         }
4384
4385         tfm = enc ? server->secmech.enc : server->secmech.dec;
4386
4387         if ((server->cipher_type == SMB2_ENCRYPTION_AES256_CCM) ||
4388                 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4389                 rc = crypto_aead_setkey(tfm, key, SMB3_GCM256_CRYPTKEY_SIZE);
4390         else
4391                 rc = crypto_aead_setkey(tfm, key, SMB3_GCM128_CRYPTKEY_SIZE);
4392
4393         if (rc) {
4394                 cifs_server_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc);
4395                 return rc;
4396         }
4397
4398         rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE);
4399         if (rc) {
4400                 cifs_server_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc);
4401                 return rc;
4402         }
4403
4404         creq = smb2_get_aead_req(tfm, rqst, num_rqst, sign, &iv, &req, &sg,
4405                                  &sensitive_size);
4406         if (IS_ERR(creq))
4407                 return PTR_ERR(creq);
4408
4409         if (!enc) {
4410                 memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE);
4411                 crypt_len += SMB2_SIGNATURE_SIZE;
4412         }
4413
4414         if ((server->cipher_type == SMB2_ENCRYPTION_AES128_GCM) ||
4415             (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4416                 memcpy(iv, (char *)tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
4417         else {
4418                 iv[0] = 3;
4419                 memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
4420         }
4421
4422         aead_request_set_tfm(req, tfm);
4423         aead_request_set_crypt(req, sg, sg, crypt_len, iv);
4424         aead_request_set_ad(req, assoc_data_len);
4425
4426         aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
4427                                   crypto_req_done, &wait);
4428
4429         rc = crypto_wait_req(enc ? crypto_aead_encrypt(req)
4430                                 : crypto_aead_decrypt(req), &wait);
4431
4432         if (!rc && enc)
4433                 memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE);
4434
4435         kvfree_sensitive(creq, sensitive_size);
4436         return rc;
4437 }
4438
4439 /*
4440  * Clear a read buffer, discarding the folios which have XA_MARK_0 set.
4441  */
4442 static void cifs_clear_xarray_buffer(struct xarray *buffer)
4443 {
4444         struct folio *folio;
4445
4446         XA_STATE(xas, buffer, 0);
4447
4448         rcu_read_lock();
4449         xas_for_each_marked(&xas, folio, ULONG_MAX, XA_MARK_0) {
4450                 folio_put(folio);
4451         }
4452         rcu_read_unlock();
4453         xa_destroy(buffer);
4454 }
4455
4456 void
4457 smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst)
4458 {
4459         int i;
4460
4461         for (i = 0; i < num_rqst; i++)
4462                 if (!xa_empty(&rqst[i].rq_buffer))
4463                         cifs_clear_xarray_buffer(&rqst[i].rq_buffer);
4464 }
4465
4466 /*
4467  * This function will initialize new_rq and encrypt the content.
4468  * The first entry, new_rq[0], only contains a single iov which contains
4469  * a smb2_transform_hdr and is pre-allocated by the caller.
4470  * This function then populates new_rq[1+] with the content from olq_rq[0+].
4471  *
4472  * The end result is an array of smb_rqst structures where the first structure
4473  * only contains a single iov for the transform header which we then can pass
4474  * to crypt_message().
4475  *
4476  * new_rq[0].rq_iov[0] :  smb2_transform_hdr pre-allocated by the caller
4477  * new_rq[1+].rq_iov[*] == old_rq[0+].rq_iov[*] : SMB2/3 requests
4478  */
4479 static int
4480 smb3_init_transform_rq(struct TCP_Server_Info *server, int num_rqst,
4481                        struct smb_rqst *new_rq, struct smb_rqst *old_rq)
4482 {
4483         struct smb2_transform_hdr *tr_hdr = new_rq[0].rq_iov[0].iov_base;
4484         struct page *page;
4485         unsigned int orig_len = 0;
4486         int i, j;
4487         int rc = -ENOMEM;
4488
4489         for (i = 1; i < num_rqst; i++) {
4490                 struct smb_rqst *old = &old_rq[i - 1];
4491                 struct smb_rqst *new = &new_rq[i];
4492                 struct xarray *buffer = &new->rq_buffer;
4493                 size_t size = iov_iter_count(&old->rq_iter), seg, copied = 0;
4494
4495                 orig_len += smb_rqst_len(server, old);
4496                 new->rq_iov = old->rq_iov;
4497                 new->rq_nvec = old->rq_nvec;
4498
4499                 xa_init(buffer);
4500
4501                 if (size > 0) {
4502                         unsigned int npages = DIV_ROUND_UP(size, PAGE_SIZE);
4503
4504                         for (j = 0; j < npages; j++) {
4505                                 void *o;
4506
4507                                 rc = -ENOMEM;
4508                                 page = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
4509                                 if (!page)
4510                                         goto err_free;
4511                                 page->index = j;
4512                                 o = xa_store(buffer, j, page, GFP_KERNEL);
4513                                 if (xa_is_err(o)) {
4514                                         rc = xa_err(o);
4515                                         put_page(page);
4516                                         goto err_free;
4517                                 }
4518
4519                                 xa_set_mark(buffer, j, XA_MARK_0);
4520
4521                                 seg = min_t(size_t, size - copied, PAGE_SIZE);
4522                                 if (copy_page_from_iter(page, 0, seg, &old->rq_iter) != seg) {
4523                                         rc = -EFAULT;
4524                                         goto err_free;
4525                                 }
4526                                 copied += seg;
4527                         }
4528                         iov_iter_xarray(&new->rq_iter, ITER_SOURCE,
4529                                         buffer, 0, size);
4530                         new->rq_iter_size = size;
4531                 }
4532         }
4533
4534         /* fill the 1st iov with a transform header */
4535         fill_transform_hdr(tr_hdr, orig_len, old_rq, server->cipher_type);
4536
4537         rc = crypt_message(server, num_rqst, new_rq, 1);
4538         cifs_dbg(FYI, "Encrypt message returned %d\n", rc);
4539         if (rc)
4540                 goto err_free;
4541
4542         return rc;
4543
4544 err_free:
4545         smb3_free_compound_rqst(num_rqst - 1, &new_rq[1]);
4546         return rc;
4547 }
4548
4549 static int
4550 smb3_is_transform_hdr(void *buf)
4551 {
4552         struct smb2_transform_hdr *trhdr = buf;
4553
4554         return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
4555 }
4556
4557 static int
4558 decrypt_raw_data(struct TCP_Server_Info *server, char *buf,
4559                  unsigned int buf_data_size, struct iov_iter *iter,
4560                  bool is_offloaded)
4561 {
4562         struct kvec iov[2];
4563         struct smb_rqst rqst = {NULL};
4564         size_t iter_size = 0;
4565         int rc;
4566
4567         iov[0].iov_base = buf;
4568         iov[0].iov_len = sizeof(struct smb2_transform_hdr);
4569         iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr);
4570         iov[1].iov_len = buf_data_size;
4571
4572         rqst.rq_iov = iov;
4573         rqst.rq_nvec = 2;
4574         if (iter) {
4575                 rqst.rq_iter = *iter;
4576                 rqst.rq_iter_size = iov_iter_count(iter);
4577                 iter_size = iov_iter_count(iter);
4578         }
4579
4580         rc = crypt_message(server, 1, &rqst, 0);
4581         cifs_dbg(FYI, "Decrypt message returned %d\n", rc);
4582
4583         if (rc)
4584                 return rc;
4585
4586         memmove(buf, iov[1].iov_base, buf_data_size);
4587
4588         if (!is_offloaded)
4589                 server->total_read = buf_data_size + iter_size;
4590
4591         return rc;
4592 }
4593
4594 static int
4595 cifs_copy_pages_to_iter(struct xarray *pages, unsigned int data_size,
4596                         unsigned int skip, struct iov_iter *iter)
4597 {
4598         struct page *page;
4599         unsigned long index;
4600
4601         xa_for_each(pages, index, page) {
4602                 size_t n, len = min_t(unsigned int, PAGE_SIZE - skip, data_size);
4603
4604                 n = copy_page_to_iter(page, skip, len, iter);
4605                 if (n != len) {
4606                         cifs_dbg(VFS, "%s: something went wrong\n", __func__);
4607                         return -EIO;
4608                 }
4609                 data_size -= n;
4610                 skip = 0;
4611         }
4612
4613         return 0;
4614 }
4615
4616 static int
4617 handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid,
4618                  char *buf, unsigned int buf_len, struct xarray *pages,
4619                  unsigned int pages_len, bool is_offloaded)
4620 {
4621         unsigned int data_offset;
4622         unsigned int data_len;
4623         unsigned int cur_off;
4624         unsigned int cur_page_idx;
4625         unsigned int pad_len;
4626         struct cifs_readdata *rdata = mid->callback_data;
4627         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
4628         int length;
4629         bool use_rdma_mr = false;
4630
4631         if (shdr->Command != SMB2_READ) {
4632                 cifs_server_dbg(VFS, "only big read responses are supported\n");
4633                 return -EOPNOTSUPP;
4634         }
4635
4636         if (server->ops->is_session_expired &&
4637             server->ops->is_session_expired(buf)) {
4638                 if (!is_offloaded)
4639                         cifs_reconnect(server, true);
4640                 return -1;
4641         }
4642
4643         if (server->ops->is_status_pending &&
4644                         server->ops->is_status_pending(buf, server))
4645                 return -1;
4646
4647         /* set up first two iov to get credits */
4648         rdata->iov[0].iov_base = buf;
4649         rdata->iov[0].iov_len = 0;
4650         rdata->iov[1].iov_base = buf;
4651         rdata->iov[1].iov_len =
4652                 min_t(unsigned int, buf_len, server->vals->read_rsp_size);
4653         cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n",
4654                  rdata->iov[0].iov_base, rdata->iov[0].iov_len);
4655         cifs_dbg(FYI, "1: iov_base=%p iov_len=%zu\n",
4656                  rdata->iov[1].iov_base, rdata->iov[1].iov_len);
4657
4658         rdata->result = server->ops->map_error(buf, true);
4659         if (rdata->result != 0) {
4660                 cifs_dbg(FYI, "%s: server returned error %d\n",
4661                          __func__, rdata->result);
4662                 /* normal error on read response */
4663                 if (is_offloaded)
4664                         mid->mid_state = MID_RESPONSE_RECEIVED;
4665                 else
4666                         dequeue_mid(mid, false);
4667                 return 0;
4668         }
4669
4670         data_offset = server->ops->read_data_offset(buf);
4671 #ifdef CONFIG_CIFS_SMB_DIRECT
4672         use_rdma_mr = rdata->mr;
4673 #endif
4674         data_len = server->ops->read_data_length(buf, use_rdma_mr);
4675
4676         if (data_offset < server->vals->read_rsp_size) {
4677                 /*
4678                  * win2k8 sometimes sends an offset of 0 when the read
4679                  * is beyond the EOF. Treat it as if the data starts just after
4680                  * the header.
4681                  */
4682                 cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n",
4683                          __func__, data_offset);
4684                 data_offset = server->vals->read_rsp_size;
4685         } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) {
4686                 /* data_offset is beyond the end of smallbuf */
4687                 cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n",
4688                          __func__, data_offset);
4689                 rdata->result = -EIO;
4690                 if (is_offloaded)
4691                         mid->mid_state = MID_RESPONSE_MALFORMED;
4692                 else
4693                         dequeue_mid(mid, rdata->result);
4694                 return 0;
4695         }
4696
4697         pad_len = data_offset - server->vals->read_rsp_size;
4698
4699         if (buf_len <= data_offset) {
4700                 /* read response payload is in pages */
4701                 cur_page_idx = pad_len / PAGE_SIZE;
4702                 cur_off = pad_len % PAGE_SIZE;
4703
4704                 if (cur_page_idx != 0) {
4705                         /* data offset is beyond the 1st page of response */
4706                         cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n",
4707                                  __func__, data_offset);
4708                         rdata->result = -EIO;
4709                         if (is_offloaded)
4710                                 mid->mid_state = MID_RESPONSE_MALFORMED;
4711                         else
4712                                 dequeue_mid(mid, rdata->result);
4713                         return 0;
4714                 }
4715
4716                 if (data_len > pages_len - pad_len) {
4717                         /* data_len is corrupt -- discard frame */
4718                         rdata->result = -EIO;
4719                         if (is_offloaded)
4720                                 mid->mid_state = MID_RESPONSE_MALFORMED;
4721                         else
4722                                 dequeue_mid(mid, rdata->result);
4723                         return 0;
4724                 }
4725
4726                 /* Copy the data to the output I/O iterator. */
4727                 rdata->result = cifs_copy_pages_to_iter(pages, pages_len,
4728                                                         cur_off, &rdata->iter);
4729                 if (rdata->result != 0) {
4730                         if (is_offloaded)
4731                                 mid->mid_state = MID_RESPONSE_MALFORMED;
4732                         else
4733                                 dequeue_mid(mid, rdata->result);
4734                         return 0;
4735                 }
4736                 rdata->got_bytes = pages_len;
4737
4738         } else if (buf_len >= data_offset + data_len) {
4739                 /* read response payload is in buf */
4740                 WARN_ONCE(pages && !xa_empty(pages),
4741                           "read data can be either in buf or in pages");
4742                 length = copy_to_iter(buf + data_offset, data_len, &rdata->iter);
4743                 if (length < 0)
4744                         return length;
4745                 rdata->got_bytes = data_len;
4746         } else {
4747                 /* read response payload cannot be in both buf and pages */
4748                 WARN_ONCE(1, "buf can not contain only a part of read data");
4749                 rdata->result = -EIO;
4750                 if (is_offloaded)
4751                         mid->mid_state = MID_RESPONSE_MALFORMED;
4752                 else
4753                         dequeue_mid(mid, rdata->result);
4754                 return 0;
4755         }
4756
4757         if (is_offloaded)
4758                 mid->mid_state = MID_RESPONSE_RECEIVED;
4759         else
4760                 dequeue_mid(mid, false);
4761         return 0;
4762 }
4763
4764 struct smb2_decrypt_work {
4765         struct work_struct decrypt;
4766         struct TCP_Server_Info *server;
4767         struct xarray buffer;
4768         char *buf;
4769         unsigned int len;
4770 };
4771
4772
4773 static void smb2_decrypt_offload(struct work_struct *work)
4774 {
4775         struct smb2_decrypt_work *dw = container_of(work,
4776                                 struct smb2_decrypt_work, decrypt);
4777         int rc;
4778         struct mid_q_entry *mid;
4779         struct iov_iter iter;
4780
4781         iov_iter_xarray(&iter, ITER_DEST, &dw->buffer, 0, dw->len);
4782         rc = decrypt_raw_data(dw->server, dw->buf, dw->server->vals->read_rsp_size,
4783                               &iter, true);
4784         if (rc) {
4785                 cifs_dbg(VFS, "error decrypting rc=%d\n", rc);
4786                 goto free_pages;
4787         }
4788
4789         dw->server->lstrp = jiffies;
4790         mid = smb2_find_dequeue_mid(dw->server, dw->buf);
4791         if (mid == NULL)
4792                 cifs_dbg(FYI, "mid not found\n");
4793         else {
4794                 mid->decrypted = true;
4795                 rc = handle_read_data(dw->server, mid, dw->buf,
4796                                       dw->server->vals->read_rsp_size,
4797                                       &dw->buffer, dw->len,
4798                                       true);
4799                 if (rc >= 0) {
4800 #ifdef CONFIG_CIFS_STATS2
4801                         mid->when_received = jiffies;
4802 #endif
4803                         if (dw->server->ops->is_network_name_deleted)
4804                                 dw->server->ops->is_network_name_deleted(dw->buf,
4805                                                                          dw->server);
4806
4807                         mid->callback(mid);
4808                 } else {
4809                         spin_lock(&dw->server->srv_lock);
4810                         if (dw->server->tcpStatus == CifsNeedReconnect) {
4811                                 spin_lock(&dw->server->mid_lock);
4812                                 mid->mid_state = MID_RETRY_NEEDED;
4813                                 spin_unlock(&dw->server->mid_lock);
4814                                 spin_unlock(&dw->server->srv_lock);
4815                                 mid->callback(mid);
4816                         } else {
4817                                 spin_lock(&dw->server->mid_lock);
4818                                 mid->mid_state = MID_REQUEST_SUBMITTED;
4819                                 mid->mid_flags &= ~(MID_DELETED);
4820                                 list_add_tail(&mid->qhead,
4821                                         &dw->server->pending_mid_q);
4822                                 spin_unlock(&dw->server->mid_lock);
4823                                 spin_unlock(&dw->server->srv_lock);
4824                         }
4825                 }
4826                 release_mid(mid);
4827         }
4828
4829 free_pages:
4830         cifs_clear_xarray_buffer(&dw->buffer);
4831         cifs_small_buf_release(dw->buf);
4832         kfree(dw);
4833 }
4834
4835
4836 static int
4837 receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid,
4838                        int *num_mids)
4839 {
4840         struct page *page;
4841         char *buf = server->smallbuf;
4842         struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
4843         struct iov_iter iter;
4844         unsigned int len, npages;
4845         unsigned int buflen = server->pdu_size;
4846         int rc;
4847         int i = 0;
4848         struct smb2_decrypt_work *dw;
4849
4850         dw = kzalloc(sizeof(struct smb2_decrypt_work), GFP_KERNEL);
4851         if (!dw)
4852                 return -ENOMEM;
4853         xa_init(&dw->buffer);
4854         INIT_WORK(&dw->decrypt, smb2_decrypt_offload);
4855         dw->server = server;
4856
4857         *num_mids = 1;
4858         len = min_t(unsigned int, buflen, server->vals->read_rsp_size +
4859                 sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1;
4860
4861         rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len);
4862         if (rc < 0)
4863                 goto free_dw;
4864         server->total_read += rc;
4865
4866         len = le32_to_cpu(tr_hdr->OriginalMessageSize) -
4867                 server->vals->read_rsp_size;
4868         dw->len = len;
4869         npages = DIV_ROUND_UP(len, PAGE_SIZE);
4870
4871         rc = -ENOMEM;
4872         for (; i < npages; i++) {
4873                 void *old;
4874
4875                 page = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
4876                 if (!page)
4877                         goto discard_data;
4878                 page->index = i;
4879                 old = xa_store(&dw->buffer, i, page, GFP_KERNEL);
4880                 if (xa_is_err(old)) {
4881                         rc = xa_err(old);
4882                         put_page(page);
4883                         goto discard_data;
4884                 }
4885                 xa_set_mark(&dw->buffer, i, XA_MARK_0);
4886         }
4887
4888         iov_iter_xarray(&iter, ITER_DEST, &dw->buffer, 0, npages * PAGE_SIZE);
4889
4890         /* Read the data into the buffer and clear excess bufferage. */
4891         rc = cifs_read_iter_from_socket(server, &iter, dw->len);
4892         if (rc < 0)
4893                 goto discard_data;
4894
4895         server->total_read += rc;
4896         if (rc < npages * PAGE_SIZE)
4897                 iov_iter_zero(npages * PAGE_SIZE - rc, &iter);
4898         iov_iter_revert(&iter, npages * PAGE_SIZE);
4899         iov_iter_truncate(&iter, dw->len);
4900
4901         rc = cifs_discard_remaining_data(server);
4902         if (rc)
4903                 goto free_pages;
4904
4905         /*
4906          * For large reads, offload to different thread for better performance,
4907          * use more cores decrypting which can be expensive
4908          */
4909
4910         if ((server->min_offload) && (server->in_flight > 1) &&
4911             (server->pdu_size >= server->min_offload)) {
4912                 dw->buf = server->smallbuf;
4913                 server->smallbuf = (char *)cifs_small_buf_get();
4914
4915                 queue_work(decrypt_wq, &dw->decrypt);
4916                 *num_mids = 0; /* worker thread takes care of finding mid */
4917                 return -1;
4918         }
4919
4920         rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size,
4921                               &iter, false);
4922         if (rc)
4923                 goto free_pages;
4924
4925         *mid = smb2_find_mid(server, buf);
4926         if (*mid == NULL) {
4927                 cifs_dbg(FYI, "mid not found\n");
4928         } else {
4929                 cifs_dbg(FYI, "mid found\n");
4930                 (*mid)->decrypted = true;
4931                 rc = handle_read_data(server, *mid, buf,
4932                                       server->vals->read_rsp_size,
4933                                       &dw->buffer, dw->len, false);
4934                 if (rc >= 0) {
4935                         if (server->ops->is_network_name_deleted) {
4936                                 server->ops->is_network_name_deleted(buf,
4937                                                                 server);
4938                         }
4939                 }
4940         }
4941
4942 free_pages:
4943         cifs_clear_xarray_buffer(&dw->buffer);
4944 free_dw:
4945         kfree(dw);
4946         return rc;
4947 discard_data:
4948         cifs_discard_remaining_data(server);
4949         goto free_pages;
4950 }
4951
4952 static int
4953 receive_encrypted_standard(struct TCP_Server_Info *server,
4954                            struct mid_q_entry **mids, char **bufs,
4955                            int *num_mids)
4956 {
4957         int ret, length;
4958         char *buf = server->smallbuf;
4959         struct smb2_hdr *shdr;
4960         unsigned int pdu_length = server->pdu_size;
4961         unsigned int buf_size;
4962         unsigned int next_cmd;
4963         struct mid_q_entry *mid_entry;
4964         int next_is_large;
4965         char *next_buffer = NULL;
4966
4967         *num_mids = 0;
4968
4969         /* switch to large buffer if too big for a small one */
4970         if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE) {
4971                 server->large_buf = true;
4972                 memcpy(server->bigbuf, buf, server->total_read);
4973                 buf = server->bigbuf;
4974         }
4975
4976         /* now read the rest */
4977         length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
4978                                 pdu_length - HEADER_SIZE(server) + 1);
4979         if (length < 0)
4980                 return length;
4981         server->total_read += length;
4982
4983         buf_size = pdu_length - sizeof(struct smb2_transform_hdr);
4984         length = decrypt_raw_data(server, buf, buf_size, NULL, false);
4985         if (length)
4986                 return length;
4987
4988         next_is_large = server->large_buf;
4989 one_more:
4990         shdr = (struct smb2_hdr *)buf;
4991         next_cmd = le32_to_cpu(shdr->NextCommand);
4992         if (next_cmd) {
4993                 if (WARN_ON_ONCE(next_cmd > pdu_length))
4994                         return -1;
4995                 if (next_is_large)
4996                         next_buffer = (char *)cifs_buf_get();
4997                 else
4998                         next_buffer = (char *)cifs_small_buf_get();
4999                 memcpy(next_buffer, buf + next_cmd, pdu_length - next_cmd);
5000         }
5001
5002         mid_entry = smb2_find_mid(server, buf);
5003         if (mid_entry == NULL)
5004                 cifs_dbg(FYI, "mid not found\n");
5005         else {
5006                 cifs_dbg(FYI, "mid found\n");
5007                 mid_entry->decrypted = true;
5008                 mid_entry->resp_buf_size = server->pdu_size;
5009         }
5010
5011         if (*num_mids >= MAX_COMPOUND) {
5012                 cifs_server_dbg(VFS, "too many PDUs in compound\n");
5013                 return -1;
5014         }
5015         bufs[*num_mids] = buf;
5016         mids[(*num_mids)++] = mid_entry;
5017
5018         if (mid_entry && mid_entry->handle)
5019                 ret = mid_entry->handle(server, mid_entry);
5020         else
5021                 ret = cifs_handle_standard(server, mid_entry);
5022
5023         if (ret == 0 && next_cmd) {
5024                 pdu_length -= next_cmd;
5025                 server->large_buf = next_is_large;
5026                 if (next_is_large)
5027                         server->bigbuf = buf = next_buffer;
5028                 else
5029                         server->smallbuf = buf = next_buffer;
5030                 goto one_more;
5031         } else if (ret != 0) {
5032                 /*
5033                  * ret != 0 here means that we didn't get to handle_mid() thus
5034                  * server->smallbuf and server->bigbuf are still valid. We need
5035                  * to free next_buffer because it is not going to be used
5036                  * anywhere.
5037                  */
5038                 if (next_is_large)
5039                         free_rsp_buf(CIFS_LARGE_BUFFER, next_buffer);
5040                 else
5041                         free_rsp_buf(CIFS_SMALL_BUFFER, next_buffer);
5042         }
5043
5044         return ret;
5045 }
5046
5047 static int
5048 smb3_receive_transform(struct TCP_Server_Info *server,
5049                        struct mid_q_entry **mids, char **bufs, int *num_mids)
5050 {
5051         char *buf = server->smallbuf;
5052         unsigned int pdu_length = server->pdu_size;
5053         struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
5054         unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
5055
5056         if (pdu_length < sizeof(struct smb2_transform_hdr) +
5057                                                 sizeof(struct smb2_hdr)) {
5058                 cifs_server_dbg(VFS, "Transform message is too small (%u)\n",
5059                          pdu_length);
5060                 cifs_reconnect(server, true);
5061                 return -ECONNABORTED;
5062         }
5063
5064         if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) {
5065                 cifs_server_dbg(VFS, "Transform message is broken\n");
5066                 cifs_reconnect(server, true);
5067                 return -ECONNABORTED;
5068         }
5069
5070         /* TODO: add support for compounds containing READ. */
5071         if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server)) {
5072                 return receive_encrypted_read(server, &mids[0], num_mids);
5073         }
5074
5075         return receive_encrypted_standard(server, mids, bufs, num_mids);
5076 }
5077
5078 int
5079 smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid)
5080 {
5081         char *buf = server->large_buf ? server->bigbuf : server->smallbuf;
5082
5083         return handle_read_data(server, mid, buf, server->pdu_size,
5084                                 NULL, 0, false);
5085 }
5086
5087 static int smb2_next_header(struct TCP_Server_Info *server, char *buf,
5088                             unsigned int *noff)
5089 {
5090         struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
5091         struct smb2_transform_hdr *t_hdr = (struct smb2_transform_hdr *)buf;
5092
5093         if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {
5094                 *noff = le32_to_cpu(t_hdr->OriginalMessageSize);
5095                 if (unlikely(check_add_overflow(*noff, sizeof(*t_hdr), noff)))
5096                         return -EINVAL;
5097         } else {
5098                 *noff = le32_to_cpu(hdr->NextCommand);
5099         }
5100         if (unlikely(*noff && *noff < MID_HEADER_SIZE(server)))
5101                 return -EINVAL;
5102         return 0;
5103 }
5104
5105 int cifs_sfu_make_node(unsigned int xid, struct inode *inode,
5106                        struct dentry *dentry, struct cifs_tcon *tcon,
5107                        const char *full_path, umode_t mode, dev_t dev)
5108 {
5109         struct cifs_open_info_data buf = {};
5110         struct TCP_Server_Info *server = tcon->ses->server;
5111         struct cifs_open_parms oparms;
5112         struct cifs_io_parms io_parms = {};
5113         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
5114         struct cifs_fid fid;
5115         unsigned int bytes_written;
5116         struct win_dev *pdev;
5117         struct kvec iov[2];
5118         __u32 oplock = server->oplocks ? REQ_OPLOCK : 0;
5119         int rc;
5120
5121         if (!S_ISCHR(mode) && !S_ISBLK(mode) && !S_ISFIFO(mode))
5122                 return -EPERM;
5123
5124         oparms = (struct cifs_open_parms) {
5125                 .tcon = tcon,
5126                 .cifs_sb = cifs_sb,
5127                 .desired_access = GENERIC_WRITE,
5128                 .create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR |
5129                                                       CREATE_OPTION_SPECIAL),
5130                 .disposition = FILE_CREATE,
5131                 .path = full_path,
5132                 .fid = &fid,
5133         };
5134
5135         rc = server->ops->open(xid, &oparms, &oplock, &buf);
5136         if (rc)
5137                 return rc;
5138
5139         /*
5140          * BB Do not bother to decode buf since no local inode yet to put
5141          * timestamps in, but we can reuse it safely.
5142          */
5143         pdev = (struct win_dev *)&buf.fi;
5144         io_parms.pid = current->tgid;
5145         io_parms.tcon = tcon;
5146         io_parms.length = sizeof(*pdev);
5147         iov[1].iov_base = pdev;
5148         iov[1].iov_len = sizeof(*pdev);
5149         if (S_ISCHR(mode)) {
5150                 memcpy(pdev->type, "IntxCHR", 8);
5151                 pdev->major = cpu_to_le64(MAJOR(dev));
5152                 pdev->minor = cpu_to_le64(MINOR(dev));
5153         } else if (S_ISBLK(mode)) {
5154                 memcpy(pdev->type, "IntxBLK", 8);
5155                 pdev->major = cpu_to_le64(MAJOR(dev));
5156                 pdev->minor = cpu_to_le64(MINOR(dev));
5157         } else if (S_ISFIFO(mode)) {
5158                 memcpy(pdev->type, "LnxFIFO", 8);
5159         }
5160
5161         rc = server->ops->sync_write(xid, &fid, &io_parms,
5162                                      &bytes_written, iov, 1);
5163         server->ops->close(xid, tcon, &fid);
5164         d_drop(dentry);
5165         /* FIXME: add code here to set EAs */
5166         cifs_free_open_info(&buf);
5167         return rc;
5168 }
5169
5170 static int smb2_make_node(unsigned int xid, struct inode *inode,
5171                           struct dentry *dentry, struct cifs_tcon *tcon,
5172                           const char *full_path, umode_t mode, dev_t dev)
5173 {
5174         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
5175
5176         /*
5177          * Check if mounted with mount parm 'sfu' mount parm.
5178          * SFU emulation should work with all servers, but only
5179          * supports block and char device (no socket & fifo),
5180          * and was used by default in earlier versions of Windows
5181          */
5182         if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL))
5183                 return -EPERM;
5184         /*
5185          * TODO: Add ability to create instead via reparse point. Windows (e.g.
5186          * their current NFS server) uses this approach to expose special files
5187          * over SMB2/SMB3 and Samba will do this with SMB3.1.1 POSIX Extensions
5188          */
5189         return cifs_sfu_make_node(xid, inode, dentry, tcon,
5190                                   full_path, mode, dev);
5191 }
5192
5193 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
5194 struct smb_version_operations smb20_operations = {
5195         .compare_fids = smb2_compare_fids,
5196         .setup_request = smb2_setup_request,
5197         .setup_async_request = smb2_setup_async_request,
5198         .check_receive = smb2_check_receive,
5199         .add_credits = smb2_add_credits,
5200         .set_credits = smb2_set_credits,
5201         .get_credits_field = smb2_get_credits_field,
5202         .get_credits = smb2_get_credits,
5203         .wait_mtu_credits = cifs_wait_mtu_credits,
5204         .get_next_mid = smb2_get_next_mid,
5205         .revert_current_mid = smb2_revert_current_mid,
5206         .read_data_offset = smb2_read_data_offset,
5207         .read_data_length = smb2_read_data_length,
5208         .map_error = map_smb2_to_linux_error,
5209         .find_mid = smb2_find_mid,
5210         .check_message = smb2_check_message,
5211         .dump_detail = smb2_dump_detail,
5212         .clear_stats = smb2_clear_stats,
5213         .print_stats = smb2_print_stats,
5214         .is_oplock_break = smb2_is_valid_oplock_break,
5215         .handle_cancelled_mid = smb2_handle_cancelled_mid,
5216         .downgrade_oplock = smb2_downgrade_oplock,
5217         .need_neg = smb2_need_neg,
5218         .negotiate = smb2_negotiate,
5219         .negotiate_wsize = smb2_negotiate_wsize,
5220         .negotiate_rsize = smb2_negotiate_rsize,
5221         .sess_setup = SMB2_sess_setup,
5222         .logoff = SMB2_logoff,
5223         .tree_connect = SMB2_tcon,
5224         .tree_disconnect = SMB2_tdis,
5225         .qfs_tcon = smb2_qfs_tcon,
5226         .is_path_accessible = smb2_is_path_accessible,
5227         .can_echo = smb2_can_echo,
5228         .echo = SMB2_echo,
5229         .query_path_info = smb2_query_path_info,
5230         .query_reparse_point = smb2_query_reparse_point,
5231         .get_srv_inum = smb2_get_srv_inum,
5232         .query_file_info = smb2_query_file_info,
5233         .set_path_size = smb2_set_path_size,
5234         .set_file_size = smb2_set_file_size,
5235         .set_file_info = smb2_set_file_info,
5236         .set_compression = smb2_set_compression,
5237         .mkdir = smb2_mkdir,
5238         .mkdir_setinfo = smb2_mkdir_setinfo,
5239         .rmdir = smb2_rmdir,
5240         .unlink = smb2_unlink,
5241         .rename = smb2_rename_path,
5242         .create_hardlink = smb2_create_hardlink,
5243         .parse_reparse_point = smb2_parse_reparse_point,
5244         .query_mf_symlink = smb3_query_mf_symlink,
5245         .create_mf_symlink = smb3_create_mf_symlink,
5246         .open = smb2_open_file,
5247         .set_fid = smb2_set_fid,
5248         .close = smb2_close_file,
5249         .flush = smb2_flush_file,
5250         .async_readv = smb2_async_readv,
5251         .async_writev = smb2_async_writev,
5252         .sync_read = smb2_sync_read,
5253         .sync_write = smb2_sync_write,
5254         .query_dir_first = smb2_query_dir_first,
5255         .query_dir_next = smb2_query_dir_next,
5256         .close_dir = smb2_close_dir,
5257         .calc_smb_size = smb2_calc_size,
5258         .is_status_pending = smb2_is_status_pending,
5259         .is_session_expired = smb2_is_session_expired,
5260         .oplock_response = smb2_oplock_response,
5261         .queryfs = smb2_queryfs,
5262         .mand_lock = smb2_mand_lock,
5263         .mand_unlock_range = smb2_unlock_range,
5264         .push_mand_locks = smb2_push_mandatory_locks,
5265         .get_lease_key = smb2_get_lease_key,
5266         .set_lease_key = smb2_set_lease_key,
5267         .new_lease_key = smb2_new_lease_key,
5268         .calc_signature = smb2_calc_signature,
5269         .is_read_op = smb2_is_read_op,
5270         .set_oplock_level = smb2_set_oplock_level,
5271         .create_lease_buf = smb2_create_lease_buf,
5272         .parse_lease_buf = smb2_parse_lease_buf,
5273         .copychunk_range = smb2_copychunk_range,
5274         .wp_retry_size = smb2_wp_retry_size,
5275         .dir_needs_close = smb2_dir_needs_close,
5276         .get_dfs_refer = smb2_get_dfs_refer,
5277         .select_sectype = smb2_select_sectype,
5278 #ifdef CONFIG_CIFS_XATTR
5279         .query_all_EAs = smb2_query_eas,
5280         .set_EA = smb2_set_ea,
5281 #endif /* CIFS_XATTR */
5282         .get_acl = get_smb2_acl,
5283         .get_acl_by_fid = get_smb2_acl_by_fid,
5284         .set_acl = set_smb2_acl,
5285         .next_header = smb2_next_header,
5286         .ioctl_query_info = smb2_ioctl_query_info,
5287         .make_node = smb2_make_node,
5288         .fiemap = smb3_fiemap,
5289         .llseek = smb3_llseek,
5290         .is_status_io_timeout = smb2_is_status_io_timeout,
5291         .is_network_name_deleted = smb2_is_network_name_deleted,
5292 };
5293 #endif /* CIFS_ALLOW_INSECURE_LEGACY */
5294
5295 struct smb_version_operations smb21_operations = {
5296         .compare_fids = smb2_compare_fids,
5297         .setup_request = smb2_setup_request,
5298         .setup_async_request = smb2_setup_async_request,
5299         .check_receive = smb2_check_receive,
5300         .add_credits = smb2_add_credits,
5301         .set_credits = smb2_set_credits,
5302         .get_credits_field = smb2_get_credits_field,
5303         .get_credits = smb2_get_credits,
5304         .wait_mtu_credits = smb2_wait_mtu_credits,
5305         .adjust_credits = smb2_adjust_credits,
5306         .get_next_mid = smb2_get_next_mid,
5307         .revert_current_mid = smb2_revert_current_mid,
5308         .read_data_offset = smb2_read_data_offset,
5309         .read_data_length = smb2_read_data_length,
5310         .map_error = map_smb2_to_linux_error,
5311         .find_mid = smb2_find_mid,
5312         .check_message = smb2_check_message,
5313         .dump_detail = smb2_dump_detail,
5314         .clear_stats = smb2_clear_stats,
5315         .print_stats = smb2_print_stats,
5316         .is_oplock_break = smb2_is_valid_oplock_break,
5317         .handle_cancelled_mid = smb2_handle_cancelled_mid,
5318         .downgrade_oplock = smb2_downgrade_oplock,
5319         .need_neg = smb2_need_neg,
5320         .negotiate = smb2_negotiate,
5321         .negotiate_wsize = smb2_negotiate_wsize,
5322         .negotiate_rsize = smb2_negotiate_rsize,
5323         .sess_setup = SMB2_sess_setup,
5324         .logoff = SMB2_logoff,
5325         .tree_connect = SMB2_tcon,
5326         .tree_disconnect = SMB2_tdis,
5327         .qfs_tcon = smb2_qfs_tcon,
5328         .is_path_accessible = smb2_is_path_accessible,
5329         .can_echo = smb2_can_echo,
5330         .echo = SMB2_echo,
5331         .query_path_info = smb2_query_path_info,
5332         .query_reparse_point = smb2_query_reparse_point,
5333         .get_srv_inum = smb2_get_srv_inum,
5334         .query_file_info = smb2_query_file_info,
5335         .set_path_size = smb2_set_path_size,
5336         .set_file_size = smb2_set_file_size,
5337         .set_file_info = smb2_set_file_info,
5338         .set_compression = smb2_set_compression,
5339         .mkdir = smb2_mkdir,
5340         .mkdir_setinfo = smb2_mkdir_setinfo,
5341         .rmdir = smb2_rmdir,
5342         .unlink = smb2_unlink,
5343         .rename = smb2_rename_path,
5344         .create_hardlink = smb2_create_hardlink,
5345         .parse_reparse_point = smb2_parse_reparse_point,
5346         .query_mf_symlink = smb3_query_mf_symlink,
5347         .create_mf_symlink = smb3_create_mf_symlink,
5348         .open = smb2_open_file,
5349         .set_fid = smb2_set_fid,
5350         .close = smb2_close_file,
5351         .flush = smb2_flush_file,
5352         .async_readv = smb2_async_readv,
5353         .async_writev = smb2_async_writev,
5354         .sync_read = smb2_sync_read,
5355         .sync_write = smb2_sync_write,
5356         .query_dir_first = smb2_query_dir_first,
5357         .query_dir_next = smb2_query_dir_next,
5358         .close_dir = smb2_close_dir,
5359         .calc_smb_size = smb2_calc_size,
5360         .is_status_pending = smb2_is_status_pending,
5361         .is_session_expired = smb2_is_session_expired,
5362         .oplock_response = smb2_oplock_response,
5363         .queryfs = smb2_queryfs,
5364         .mand_lock = smb2_mand_lock,
5365         .mand_unlock_range = smb2_unlock_range,
5366         .push_mand_locks = smb2_push_mandatory_locks,
5367         .get_lease_key = smb2_get_lease_key,
5368         .set_lease_key = smb2_set_lease_key,
5369         .new_lease_key = smb2_new_lease_key,
5370         .calc_signature = smb2_calc_signature,
5371         .is_read_op = smb21_is_read_op,
5372         .set_oplock_level = smb21_set_oplock_level,
5373         .create_lease_buf = smb2_create_lease_buf,
5374         .parse_lease_buf = smb2_parse_lease_buf,
5375         .copychunk_range = smb2_copychunk_range,
5376         .wp_retry_size = smb2_wp_retry_size,
5377         .dir_needs_close = smb2_dir_needs_close,
5378         .enum_snapshots = smb3_enum_snapshots,
5379         .notify = smb3_notify,
5380         .get_dfs_refer = smb2_get_dfs_refer,
5381         .select_sectype = smb2_select_sectype,
5382 #ifdef CONFIG_CIFS_XATTR
5383         .query_all_EAs = smb2_query_eas,
5384         .set_EA = smb2_set_ea,
5385 #endif /* CIFS_XATTR */
5386         .get_acl = get_smb2_acl,
5387         .get_acl_by_fid = get_smb2_acl_by_fid,
5388         .set_acl = set_smb2_acl,
5389         .next_header = smb2_next_header,
5390         .ioctl_query_info = smb2_ioctl_query_info,
5391         .make_node = smb2_make_node,
5392         .fiemap = smb3_fiemap,
5393         .llseek = smb3_llseek,
5394         .is_status_io_timeout = smb2_is_status_io_timeout,
5395         .is_network_name_deleted = smb2_is_network_name_deleted,
5396 };
5397
5398 struct smb_version_operations smb30_operations = {
5399         .compare_fids = smb2_compare_fids,
5400         .setup_request = smb2_setup_request,
5401         .setup_async_request = smb2_setup_async_request,
5402         .check_receive = smb2_check_receive,
5403         .add_credits = smb2_add_credits,
5404         .set_credits = smb2_set_credits,
5405         .get_credits_field = smb2_get_credits_field,
5406         .get_credits = smb2_get_credits,
5407         .wait_mtu_credits = smb2_wait_mtu_credits,
5408         .adjust_credits = smb2_adjust_credits,
5409         .get_next_mid = smb2_get_next_mid,
5410         .revert_current_mid = smb2_revert_current_mid,
5411         .read_data_offset = smb2_read_data_offset,
5412         .read_data_length = smb2_read_data_length,
5413         .map_error = map_smb2_to_linux_error,
5414         .find_mid = smb2_find_mid,
5415         .check_message = smb2_check_message,
5416         .dump_detail = smb2_dump_detail,
5417         .clear_stats = smb2_clear_stats,
5418         .print_stats = smb2_print_stats,
5419         .dump_share_caps = smb2_dump_share_caps,
5420         .is_oplock_break = smb2_is_valid_oplock_break,
5421         .handle_cancelled_mid = smb2_handle_cancelled_mid,
5422         .downgrade_oplock = smb3_downgrade_oplock,
5423         .need_neg = smb2_need_neg,
5424         .negotiate = smb2_negotiate,
5425         .negotiate_wsize = smb3_negotiate_wsize,
5426         .negotiate_rsize = smb3_negotiate_rsize,
5427         .sess_setup = SMB2_sess_setup,
5428         .logoff = SMB2_logoff,
5429         .tree_connect = SMB2_tcon,
5430         .tree_disconnect = SMB2_tdis,
5431         .qfs_tcon = smb3_qfs_tcon,
5432         .is_path_accessible = smb2_is_path_accessible,
5433         .can_echo = smb2_can_echo,
5434         .echo = SMB2_echo,
5435         .query_path_info = smb2_query_path_info,
5436         /* WSL tags introduced long after smb2.1, enable for SMB3, 3.11 only */
5437         .query_reparse_point = smb2_query_reparse_point,
5438         .get_srv_inum = smb2_get_srv_inum,
5439         .query_file_info = smb2_query_file_info,
5440         .set_path_size = smb2_set_path_size,
5441         .set_file_size = smb2_set_file_size,
5442         .set_file_info = smb2_set_file_info,
5443         .set_compression = smb2_set_compression,
5444         .mkdir = smb2_mkdir,
5445         .mkdir_setinfo = smb2_mkdir_setinfo,
5446         .rmdir = smb2_rmdir,
5447         .unlink = smb2_unlink,
5448         .rename = smb2_rename_path,
5449         .create_hardlink = smb2_create_hardlink,
5450         .parse_reparse_point = smb2_parse_reparse_point,
5451         .query_mf_symlink = smb3_query_mf_symlink,
5452         .create_mf_symlink = smb3_create_mf_symlink,
5453         .open = smb2_open_file,
5454         .set_fid = smb2_set_fid,
5455         .close = smb2_close_file,
5456         .close_getattr = smb2_close_getattr,
5457         .flush = smb2_flush_file,
5458         .async_readv = smb2_async_readv,
5459         .async_writev = smb2_async_writev,
5460         .sync_read = smb2_sync_read,
5461         .sync_write = smb2_sync_write,
5462         .query_dir_first = smb2_query_dir_first,
5463         .query_dir_next = smb2_query_dir_next,
5464         .close_dir = smb2_close_dir,
5465         .calc_smb_size = smb2_calc_size,
5466         .is_status_pending = smb2_is_status_pending,
5467         .is_session_expired = smb2_is_session_expired,
5468         .oplock_response = smb2_oplock_response,
5469         .queryfs = smb2_queryfs,
5470         .mand_lock = smb2_mand_lock,
5471         .mand_unlock_range = smb2_unlock_range,
5472         .push_mand_locks = smb2_push_mandatory_locks,
5473         .get_lease_key = smb2_get_lease_key,
5474         .set_lease_key = smb2_set_lease_key,
5475         .new_lease_key = smb2_new_lease_key,
5476         .generate_signingkey = generate_smb30signingkey,
5477         .calc_signature = smb3_calc_signature,
5478         .set_integrity  = smb3_set_integrity,
5479         .is_read_op = smb21_is_read_op,
5480         .set_oplock_level = smb3_set_oplock_level,
5481         .create_lease_buf = smb3_create_lease_buf,
5482         .parse_lease_buf = smb3_parse_lease_buf,
5483         .copychunk_range = smb2_copychunk_range,
5484         .duplicate_extents = smb2_duplicate_extents,
5485         .validate_negotiate = smb3_validate_negotiate,
5486         .wp_retry_size = smb2_wp_retry_size,
5487         .dir_needs_close = smb2_dir_needs_close,
5488         .fallocate = smb3_fallocate,
5489         .enum_snapshots = smb3_enum_snapshots,
5490         .notify = smb3_notify,
5491         .init_transform_rq = smb3_init_transform_rq,
5492         .is_transform_hdr = smb3_is_transform_hdr,
5493         .receive_transform = smb3_receive_transform,
5494         .get_dfs_refer = smb2_get_dfs_refer,
5495         .select_sectype = smb2_select_sectype,
5496 #ifdef CONFIG_CIFS_XATTR
5497         .query_all_EAs = smb2_query_eas,
5498         .set_EA = smb2_set_ea,
5499 #endif /* CIFS_XATTR */
5500         .get_acl = get_smb2_acl,
5501         .get_acl_by_fid = get_smb2_acl_by_fid,
5502         .set_acl = set_smb2_acl,
5503         .next_header = smb2_next_header,
5504         .ioctl_query_info = smb2_ioctl_query_info,
5505         .make_node = smb2_make_node,
5506         .fiemap = smb3_fiemap,
5507         .llseek = smb3_llseek,
5508         .is_status_io_timeout = smb2_is_status_io_timeout,
5509         .is_network_name_deleted = smb2_is_network_name_deleted,
5510 };
5511
5512 struct smb_version_operations smb311_operations = {
5513         .compare_fids = smb2_compare_fids,
5514         .setup_request = smb2_setup_request,
5515         .setup_async_request = smb2_setup_async_request,
5516         .check_receive = smb2_check_receive,
5517         .add_credits = smb2_add_credits,
5518         .set_credits = smb2_set_credits,
5519         .get_credits_field = smb2_get_credits_field,
5520         .get_credits = smb2_get_credits,
5521         .wait_mtu_credits = smb2_wait_mtu_credits,
5522         .adjust_credits = smb2_adjust_credits,
5523         .get_next_mid = smb2_get_next_mid,
5524         .revert_current_mid = smb2_revert_current_mid,
5525         .read_data_offset = smb2_read_data_offset,
5526         .read_data_length = smb2_read_data_length,
5527         .map_error = map_smb2_to_linux_error,
5528         .find_mid = smb2_find_mid,
5529         .check_message = smb2_check_message,
5530         .dump_detail = smb2_dump_detail,
5531         .clear_stats = smb2_clear_stats,
5532         .print_stats = smb2_print_stats,
5533         .dump_share_caps = smb2_dump_share_caps,
5534         .is_oplock_break = smb2_is_valid_oplock_break,
5535         .handle_cancelled_mid = smb2_handle_cancelled_mid,
5536         .downgrade_oplock = smb3_downgrade_oplock,
5537         .need_neg = smb2_need_neg,
5538         .negotiate = smb2_negotiate,
5539         .negotiate_wsize = smb3_negotiate_wsize,
5540         .negotiate_rsize = smb3_negotiate_rsize,
5541         .sess_setup = SMB2_sess_setup,
5542         .logoff = SMB2_logoff,
5543         .tree_connect = SMB2_tcon,
5544         .tree_disconnect = SMB2_tdis,
5545         .qfs_tcon = smb3_qfs_tcon,
5546         .is_path_accessible = smb2_is_path_accessible,
5547         .can_echo = smb2_can_echo,
5548         .echo = SMB2_echo,
5549         .query_path_info = smb2_query_path_info,
5550         .query_reparse_point = smb2_query_reparse_point,
5551         .get_srv_inum = smb2_get_srv_inum,
5552         .query_file_info = smb2_query_file_info,
5553         .set_path_size = smb2_set_path_size,
5554         .set_file_size = smb2_set_file_size,
5555         .set_file_info = smb2_set_file_info,
5556         .set_compression = smb2_set_compression,
5557         .mkdir = smb2_mkdir,
5558         .mkdir_setinfo = smb2_mkdir_setinfo,
5559         .posix_mkdir = smb311_posix_mkdir,
5560         .rmdir = smb2_rmdir,
5561         .unlink = smb2_unlink,
5562         .rename = smb2_rename_path,
5563         .create_hardlink = smb2_create_hardlink,
5564         .parse_reparse_point = smb2_parse_reparse_point,
5565         .query_mf_symlink = smb3_query_mf_symlink,
5566         .create_mf_symlink = smb3_create_mf_symlink,
5567         .open = smb2_open_file,
5568         .set_fid = smb2_set_fid,
5569         .close = smb2_close_file,
5570         .close_getattr = smb2_close_getattr,
5571         .flush = smb2_flush_file,
5572         .async_readv = smb2_async_readv,
5573         .async_writev = smb2_async_writev,
5574         .sync_read = smb2_sync_read,
5575         .sync_write = smb2_sync_write,
5576         .query_dir_first = smb2_query_dir_first,
5577         .query_dir_next = smb2_query_dir_next,
5578         .close_dir = smb2_close_dir,
5579         .calc_smb_size = smb2_calc_size,
5580         .is_status_pending = smb2_is_status_pending,
5581         .is_session_expired = smb2_is_session_expired,
5582         .oplock_response = smb2_oplock_response,
5583         .queryfs = smb311_queryfs,
5584         .mand_lock = smb2_mand_lock,
5585         .mand_unlock_range = smb2_unlock_range,
5586         .push_mand_locks = smb2_push_mandatory_locks,
5587         .get_lease_key = smb2_get_lease_key,
5588         .set_lease_key = smb2_set_lease_key,
5589         .new_lease_key = smb2_new_lease_key,
5590         .generate_signingkey = generate_smb311signingkey,
5591         .calc_signature = smb3_calc_signature,
5592         .set_integrity  = smb3_set_integrity,
5593         .is_read_op = smb21_is_read_op,
5594         .set_oplock_level = smb3_set_oplock_level,
5595         .create_lease_buf = smb3_create_lease_buf,
5596         .parse_lease_buf = smb3_parse_lease_buf,
5597         .copychunk_range = smb2_copychunk_range,
5598         .duplicate_extents = smb2_duplicate_extents,
5599 /*      .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
5600         .wp_retry_size = smb2_wp_retry_size,
5601         .dir_needs_close = smb2_dir_needs_close,
5602         .fallocate = smb3_fallocate,
5603         .enum_snapshots = smb3_enum_snapshots,
5604         .notify = smb3_notify,
5605         .init_transform_rq = smb3_init_transform_rq,
5606         .is_transform_hdr = smb3_is_transform_hdr,
5607         .receive_transform = smb3_receive_transform,
5608         .get_dfs_refer = smb2_get_dfs_refer,
5609         .select_sectype = smb2_select_sectype,
5610 #ifdef CONFIG_CIFS_XATTR
5611         .query_all_EAs = smb2_query_eas,
5612         .set_EA = smb2_set_ea,
5613 #endif /* CIFS_XATTR */
5614         .get_acl = get_smb2_acl,
5615         .get_acl_by_fid = get_smb2_acl_by_fid,
5616         .set_acl = set_smb2_acl,
5617         .next_header = smb2_next_header,
5618         .ioctl_query_info = smb2_ioctl_query_info,
5619         .make_node = smb2_make_node,
5620         .fiemap = smb3_fiemap,
5621         .llseek = smb3_llseek,
5622         .is_status_io_timeout = smb2_is_status_io_timeout,
5623         .is_network_name_deleted = smb2_is_network_name_deleted,
5624 };
5625
5626 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
5627 struct smb_version_values smb20_values = {
5628         .version_string = SMB20_VERSION_STRING,
5629         .protocol_id = SMB20_PROT_ID,
5630         .req_capabilities = 0, /* MBZ */
5631         .large_lock_type = 0,
5632         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5633         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5634         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5635         .header_size = sizeof(struct smb2_hdr),
5636         .header_preamble_size = 0,
5637         .max_header_size = MAX_SMB2_HDR_SIZE,
5638         .read_rsp_size = sizeof(struct smb2_read_rsp),
5639         .lock_cmd = SMB2_LOCK,
5640         .cap_unix = 0,
5641         .cap_nt_find = SMB2_NT_FIND,
5642         .cap_large_files = SMB2_LARGE_FILES,
5643         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5644         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5645         .create_lease_size = sizeof(struct create_lease),
5646 };
5647 #endif /* ALLOW_INSECURE_LEGACY */
5648
5649 struct smb_version_values smb21_values = {
5650         .version_string = SMB21_VERSION_STRING,
5651         .protocol_id = SMB21_PROT_ID,
5652         .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
5653         .large_lock_type = 0,
5654         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5655         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5656         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5657         .header_size = sizeof(struct smb2_hdr),
5658         .header_preamble_size = 0,
5659         .max_header_size = MAX_SMB2_HDR_SIZE,
5660         .read_rsp_size = sizeof(struct smb2_read_rsp),
5661         .lock_cmd = SMB2_LOCK,
5662         .cap_unix = 0,
5663         .cap_nt_find = SMB2_NT_FIND,
5664         .cap_large_files = SMB2_LARGE_FILES,
5665         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5666         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5667         .create_lease_size = sizeof(struct create_lease),
5668 };
5669
5670 struct smb_version_values smb3any_values = {
5671         .version_string = SMB3ANY_VERSION_STRING,
5672         .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
5673         .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,
5674         .large_lock_type = 0,
5675         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5676         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5677         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5678         .header_size = sizeof(struct smb2_hdr),
5679         .header_preamble_size = 0,
5680         .max_header_size = MAX_SMB2_HDR_SIZE,
5681         .read_rsp_size = sizeof(struct smb2_read_rsp),
5682         .lock_cmd = SMB2_LOCK,
5683         .cap_unix = 0,
5684         .cap_nt_find = SMB2_NT_FIND,
5685         .cap_large_files = SMB2_LARGE_FILES,
5686         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5687         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5688         .create_lease_size = sizeof(struct create_lease_v2),
5689 };
5690
5691 struct smb_version_values smbdefault_values = {
5692         .version_string = SMBDEFAULT_VERSION_STRING,
5693         .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
5694         .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,
5695         .large_lock_type = 0,
5696         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5697         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5698         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5699         .header_size = sizeof(struct smb2_hdr),
5700         .header_preamble_size = 0,
5701         .max_header_size = MAX_SMB2_HDR_SIZE,
5702         .read_rsp_size = sizeof(struct smb2_read_rsp),
5703         .lock_cmd = SMB2_LOCK,
5704         .cap_unix = 0,
5705         .cap_nt_find = SMB2_NT_FIND,
5706         .cap_large_files = SMB2_LARGE_FILES,
5707         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5708         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5709         .create_lease_size = sizeof(struct create_lease_v2),
5710 };
5711
5712 struct smb_version_values smb30_values = {
5713         .version_string = SMB30_VERSION_STRING,
5714         .protocol_id = SMB30_PROT_ID,
5715         .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,
5716         .large_lock_type = 0,
5717         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5718         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5719         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5720         .header_size = sizeof(struct smb2_hdr),
5721         .header_preamble_size = 0,
5722         .max_header_size = MAX_SMB2_HDR_SIZE,
5723         .read_rsp_size = sizeof(struct smb2_read_rsp),
5724         .lock_cmd = SMB2_LOCK,
5725         .cap_unix = 0,
5726         .cap_nt_find = SMB2_NT_FIND,
5727         .cap_large_files = SMB2_LARGE_FILES,
5728         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5729         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5730         .create_lease_size = sizeof(struct create_lease_v2),
5731 };
5732
5733 struct smb_version_values smb302_values = {
5734         .version_string = SMB302_VERSION_STRING,
5735         .protocol_id = SMB302_PROT_ID,
5736         .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,
5737         .large_lock_type = 0,
5738         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5739         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5740         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5741         .header_size = sizeof(struct smb2_hdr),
5742         .header_preamble_size = 0,
5743         .max_header_size = MAX_SMB2_HDR_SIZE,
5744         .read_rsp_size = sizeof(struct smb2_read_rsp),
5745         .lock_cmd = SMB2_LOCK,
5746         .cap_unix = 0,
5747         .cap_nt_find = SMB2_NT_FIND,
5748         .cap_large_files = SMB2_LARGE_FILES,
5749         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5750         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5751         .create_lease_size = sizeof(struct create_lease_v2),
5752 };
5753
5754 struct smb_version_values smb311_values = {
5755         .version_string = SMB311_VERSION_STRING,
5756         .protocol_id = SMB311_PROT_ID,
5757         .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,
5758         .large_lock_type = 0,
5759         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5760         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5761         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5762         .header_size = sizeof(struct smb2_hdr),
5763         .header_preamble_size = 0,
5764         .max_header_size = MAX_SMB2_HDR_SIZE,
5765         .read_rsp_size = sizeof(struct smb2_read_rsp),
5766         .lock_cmd = SMB2_LOCK,
5767         .cap_unix = 0,
5768         .cap_nt_find = SMB2_NT_FIND,
5769         .cap_large_files = SMB2_LARGE_FILES,
5770         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5771         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5772         .create_lease_size = sizeof(struct create_lease_v2),
5773 };