fs/cifs/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 "cifsfs.h"
  16 #include "cifsglob.h"
  17 #include "smb2pdu.h"
  18 #include "smb2proto.h"
  19 #include "cifsproto.h"
  20 #include "cifs_debug.h"
  21 #include "cifs_unicode.h"
  22 #include "smb2status.h"
  23 #include "smb2glob.h"
  24 #include "cifs_ioctl.h"
  25 #include "smbdirect.h"
  26
  27 /* Change credits for different ops and return the total number of credits */
  28 static int
  29 change_conf(struct TCP_Server_Info *server)
  30 {
  31         server->credits += server->echo_credits + server->oplock_credits;
  32         server->oplock_credits = server->echo_credits = 0;
  33         switch (server->credits) {
  34         case 0:
  35                 return 0;
  36         case 1:
  37                 server->echoes = false;
  38                 server->oplocks = false;
  39                 break;
  40         case 2:
  41                 server->echoes = true;
  42                 server->oplocks = false;
  43                 server->echo_credits = 1;
  44                 break;
  45         default:
  46                 server->echoes = true;
  47                 if (enable_oplocks) {
  48                         server->oplocks = true;
  49                         server->oplock_credits = 1;
  50                 } else
  51                         server->oplocks = false;
  52
  53                 server->echo_credits = 1;
  54         }
  55         server->credits -= server->echo_credits + server->oplock_credits;
  56         return server->credits + server->echo_credits + server->oplock_credits;
  57 }
  58
  59 static void
  60 smb2_add_credits(struct TCP_Server_Info *server,
  61                  const struct cifs_credits *credits, const int optype)
  62 {
  63         int *val, rc = -1;
  64         unsigned int add = credits->value;
  65         unsigned int instance = credits->instance;
  66         bool reconnect_detected = false;
  67
  68         spin_lock(&server->req_lock);
  69         val = server->ops->get_credits_field(server, optype);
  70
  71         /* eg found case where write overlapping reconnect messed up credits */
  72         if (((optype & CIFS_OP_MASK) == CIFS_NEG_OP) && (*val != 0))
  73                 trace_smb3_reconnect_with_invalid_credits(server->CurrentMid,
  74                         server->hostname, *val);
  75         if ((instance == 0) || (instance == server->reconnect_instance))
  76                 *val += add;
  77         else
  78                 reconnect_detected = true;
  79
  80         if (*val > 65000) {
  81                 *val = 65000; /* Don't get near 64K credits, avoid srv bugs */
  82                 printk_once(KERN_WARNING "server overflowed SMB3 credits\n");
  83         }
  84         server->in_flight--;
  85         if (server->in_flight == 0 && (optype & CIFS_OP_MASK) != CIFS_NEG_OP)
  86                 rc = change_conf(server);
  87         /*
  88          * Sometimes server returns 0 credits on oplock break ack - we need to
  89          * rebalance credits in this case.
  90          */
  91         else if (server->in_flight > 0 && server->oplock_credits == 0 &&
  92                  server->oplocks) {
  93                 if (server->credits > 1) {
  94                         server->credits--;
  95                         server->oplock_credits++;
  96                 }
  97         }
  98         spin_unlock(&server->req_lock);
  99         wake_up(&server->request_q);
 100
 101         if (reconnect_detected)
 102                 cifs_dbg(FYI, "trying to put %d credits from the old server instance %d\n",
 103                          add, instance);
 104
 105         if (server->tcpStatus == CifsNeedReconnect
 106             || server->tcpStatus == CifsExiting)
 107                 return;
 108
 109         switch (rc) {
 110         case -1:
 111                 /* change_conf hasn't been executed */
 112                 break;
 113         case 0:
 114                 cifs_server_dbg(VFS, "Possible client or server bug - zero credits\n");
 115                 break;
 116         case 1:
 117                 cifs_server_dbg(VFS, "disabling echoes and oplocks\n");
 118                 break;
 119         case 2:
 120                 cifs_dbg(FYI, "disabling oplocks\n");
 121                 break;
 122         default:
 123                 cifs_dbg(FYI, "add %u credits total=%d\n", add, rc);
 124         }
 125 }
 126
 127 static void
 128 smb2_set_credits(struct TCP_Server_Info *server, const int val)
 129 {
 130         spin_lock(&server->req_lock);
 131         server->credits = val;
 132         if (val == 1)
 133                 server->reconnect_instance++;
 134         spin_unlock(&server->req_lock);
 135         /* don't log while holding the lock */
 136         if (val == 1)
 137                 cifs_dbg(FYI, "set credits to 1 due to smb2 reconnect\n");
 138 }
 139
 140 static int *
 141 smb2_get_credits_field(struct TCP_Server_Info *server, const int optype)
 142 {
 143         switch (optype) {
 144         case CIFS_ECHO_OP:
 145                 return &server->echo_credits;
 146         case CIFS_OBREAK_OP:
 147                 return &server->oplock_credits;
 148         default:
 149                 return &server->credits;
 150         }
 151 }
 152
 153 static unsigned int
 154 smb2_get_credits(struct mid_q_entry *mid)
 155 {
 156         return mid->credits_received;
 157 }
 158
 159 static int
 160 smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size,
 161                       unsigned int *num, struct cifs_credits *credits)
 162 {
 163         int rc = 0;
 164         unsigned int scredits;
 165
 166         spin_lock(&server->req_lock);
 167         while (1) {
 168                 if (server->credits <= 0) {
 169                         spin_unlock(&server->req_lock);
 170                         cifs_num_waiters_inc(server);
 171                         rc = wait_event_killable(server->request_q,
 172                                 has_credits(server, &server->credits, 1));
 173                         cifs_num_waiters_dec(server);
 174                         if (rc)
 175                                 return rc;
 176                         spin_lock(&server->req_lock);
 177                 } else {
 178                         if (server->tcpStatus == CifsExiting) {
 179                                 spin_unlock(&server->req_lock);
 180                                 return -ENOENT;
 181                         }
 182
 183                         scredits = server->credits;
 184                         /* can deadlock with reopen */
 185                         if (scredits <= 8) {
 186                                 *num = SMB2_MAX_BUFFER_SIZE;
 187                                 credits->value = 0;
 188                                 credits->instance = 0;
 189                                 break;
 190                         }
 191
 192                         /* leave some credits for reopen and other ops */
 193                         scredits -= 8;
 194                         *num = min_t(unsigned int, size,
 195                                      scredits * SMB2_MAX_BUFFER_SIZE);
 196
 197                         credits->value =
 198                                 DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE);
 199                         credits->instance = server->reconnect_instance;
 200                         server->credits -= credits->value;
 201                         server->in_flight++;
 202                         if (server->in_flight > server->max_in_flight)
 203                                 server->max_in_flight = server->in_flight;
 204                         break;
 205                 }
 206         }
 207         spin_unlock(&server->req_lock);
 208         return rc;
 209 }
 210
 211 static int
 212 smb2_adjust_credits(struct TCP_Server_Info *server,
 213                     struct cifs_credits *credits,
 214                     const unsigned int payload_size)
 215 {
 216         int new_val = DIV_ROUND_UP(payload_size, SMB2_MAX_BUFFER_SIZE);
 217
 218         if (!credits->value || credits->value == new_val)
 219                 return 0;
 220
 221         if (credits->value < new_val) {
 222                 WARN_ONCE(1, "request has less credits (%d) than required (%d)",
 223                           credits->value, new_val);
 224                 return -ENOTSUPP;
 225         }
 226
 227         spin_lock(&server->req_lock);
 228
 229         if (server->reconnect_instance != credits->instance) {
 230                 spin_unlock(&server->req_lock);
 231                 cifs_server_dbg(VFS, "trying to return %d credits to old session\n",
 232                          credits->value - new_val);
 233                 return -EAGAIN;
 234         }
 235
 236         server->credits += credits->value - new_val;
 237         spin_unlock(&server->req_lock);
 238         wake_up(&server->request_q);
 239         credits->value = new_val;
 240         return 0;
 241 }
 242
 243 static __u64
 244 smb2_get_next_mid(struct TCP_Server_Info *server)
 245 {
 246         __u64 mid;
 247         /* for SMB2 we need the current value */
 248         spin_lock(&GlobalMid_Lock);
 249         mid = server->CurrentMid++;
 250         spin_unlock(&GlobalMid_Lock);
 251         return mid;
 252 }
 253
 254 static void
 255 smb2_revert_current_mid(struct TCP_Server_Info *server, const unsigned int val)
 256 {
 257         spin_lock(&GlobalMid_Lock);
 258         if (server->CurrentMid >= val)
 259                 server->CurrentMid -= val;
 260         spin_unlock(&GlobalMid_Lock);
 261 }
 262
 263 static struct mid_q_entry *
 264 smb2_find_mid(struct TCP_Server_Info *server, char *buf)
 265 {
 266         struct mid_q_entry *mid;
 267         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
 268         __u64 wire_mid = le64_to_cpu(shdr->MessageId);
 269
 270         if (shdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {
 271                 cifs_server_dbg(VFS, "Encrypted frame parsing not supported yet\n");
 272                 return NULL;
 273         }
 274
 275         spin_lock(&GlobalMid_Lock);
 276         list_for_each_entry(mid, &server->pending_mid_q, qhead) {
 277                 if ((mid->mid == wire_mid) &&
 278                     (mid->mid_state == MID_REQUEST_SUBMITTED) &&
 279                     (mid->command == shdr->Command)) {
 280                         kref_get(&mid->refcount);
 281                         spin_unlock(&GlobalMid_Lock);
 282                         return mid;
 283                 }
 284         }
 285         spin_unlock(&GlobalMid_Lock);
 286         return NULL;
 287 }
 288
 289 static void
 290 smb2_dump_detail(void *buf, struct TCP_Server_Info *server)
 291 {
 292 #ifdef CONFIG_CIFS_DEBUG2
 293         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
 294
 295         cifs_server_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
 296                  shdr->Command, shdr->Status, shdr->Flags, shdr->MessageId,
 297                  shdr->ProcessId);
 298         cifs_server_dbg(VFS, "smb buf %p len %u\n", buf,
 299                  server->ops->calc_smb_size(buf, server));
 300 #endif
 301 }
 302
 303 static bool
 304 smb2_need_neg(struct TCP_Server_Info *server)
 305 {
 306         return server->max_read == 0;
 307 }
 308
 309 static int
 310 smb2_negotiate(const unsigned int xid, struct cifs_ses *ses)
 311 {
 312         int rc;
 313
 314         cifs_ses_server(ses)->CurrentMid = 0;
 315         rc = SMB2_negotiate(xid, ses);
 316         /* BB we probably don't need to retry with modern servers */
 317         if (rc == -EAGAIN)
 318                 rc = -EHOSTDOWN;
 319         return rc;
 320 }
 321
 322 static unsigned int
 323 smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 324 {
 325         struct TCP_Server_Info *server = tcon->ses->server;
 326         unsigned int wsize;
 327
 328         /* start with specified wsize, or default */
 329         wsize = volume_info->wsize ? volume_info->wsize : CIFS_DEFAULT_IOSIZE;
 330         wsize = min_t(unsigned int, wsize, server->max_write);
 331         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 332                 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
 333
 334         return wsize;
 335 }
 336
 337 static unsigned int
 338 smb3_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 339 {
 340         struct TCP_Server_Info *server = tcon->ses->server;
 341         unsigned int wsize;
 342
 343         /* start with specified wsize, or default */
 344         wsize = volume_info->wsize ? volume_info->wsize : SMB3_DEFAULT_IOSIZE;
 345         wsize = min_t(unsigned int, wsize, server->max_write);
 346 #ifdef CONFIG_CIFS_SMB_DIRECT
 347         if (server->rdma) {
 348                 if (server->sign)
 349                         /*
 350                          * Account for SMB2 data transfer packet header and
 351                          * possible encryption header
 352                          */
 353                         wsize = min_t(unsigned int,
 354                                 wsize,
 355                                 server->smbd_conn->max_fragmented_send_size -
 356                                         SMB2_READWRITE_PDU_HEADER_SIZE -
 357                                         sizeof(struct smb2_transform_hdr));
 358                 else
 359                         wsize = min_t(unsigned int,
 360                                 wsize, server->smbd_conn->max_readwrite_size);
 361         }
 362 #endif
 363         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 364                 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
 365
 366         return wsize;
 367 }
 368
 369 static unsigned int
 370 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 371 {
 372         struct TCP_Server_Info *server = tcon->ses->server;
 373         unsigned int rsize;
 374
 375         /* start with specified rsize, or default */
 376         rsize = volume_info->rsize ? volume_info->rsize : CIFS_DEFAULT_IOSIZE;
 377         rsize = min_t(unsigned int, rsize, server->max_read);
 378
 379         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 380                 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
 381
 382         return rsize;
 383 }
 384
 385 static unsigned int
 386 smb3_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 387 {
 388         struct TCP_Server_Info *server = tcon->ses->server;
 389         unsigned int rsize;
 390
 391         /* start with specified rsize, or default */
 392         rsize = volume_info->rsize ? volume_info->rsize : SMB3_DEFAULT_IOSIZE;
 393         rsize = min_t(unsigned int, rsize, server->max_read);
 394 #ifdef CONFIG_CIFS_SMB_DIRECT
 395         if (server->rdma) {
 396                 if (server->sign)
 397                         /*
 398                          * Account for SMB2 data transfer packet header and
 399                          * possible encryption header
 400                          */
 401                         rsize = min_t(unsigned int,
 402                                 rsize,
 403                                 server->smbd_conn->max_fragmented_recv_size -
 404                                         SMB2_READWRITE_PDU_HEADER_SIZE -
 405                                         sizeof(struct smb2_transform_hdr));
 406                 else
 407                         rsize = min_t(unsigned int,
 408                                 rsize, server->smbd_conn->max_readwrite_size);
 409         }
 410 #endif
 411
 412         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 413                 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
 414
 415         return rsize;
 416 }
 417
 418 static int
 419 parse_server_interfaces(struct network_interface_info_ioctl_rsp *buf,
 420                         size_t buf_len,
 421                         struct cifs_server_iface **iface_list,
 422                         size_t *iface_count)
 423 {
 424         struct network_interface_info_ioctl_rsp *p;
 425         struct sockaddr_in *addr4;
 426         struct sockaddr_in6 *addr6;
 427         struct iface_info_ipv4 *p4;
 428         struct iface_info_ipv6 *p6;
 429         struct cifs_server_iface *info;
 430         ssize_t bytes_left;
 431         size_t next = 0;
 432         int nb_iface = 0;
 433         int rc = 0;
 434
 435         *iface_list = NULL;
 436         *iface_count = 0;
 437
 438         /*
 439          * Fist pass: count and sanity check
 440          */
 441
 442         bytes_left = buf_len;
 443         p = buf;
 444         while (bytes_left >= sizeof(*p)) {
 445                 nb_iface++;
 446                 next = le32_to_cpu(p->Next);
 447                 if (!next) {
 448                         bytes_left -= sizeof(*p);
 449                         break;
 450                 }
 451                 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next);
 452                 bytes_left -= next;
 453         }
 454
 455         if (!nb_iface) {
 456                 cifs_dbg(VFS, "%s: malformed interface info\n", __func__);
 457                 rc = -EINVAL;
 458                 goto out;
 459         }
 460
 461         if (bytes_left || p->Next)
 462                 cifs_dbg(VFS, "%s: incomplete interface info\n", __func__);
 463
 464
 465         /*
 466          * Second pass: extract info to internal structure
 467          */
 468
 469         *iface_list = kcalloc(nb_iface, sizeof(**iface_list), GFP_KERNEL);
 470         if (!*iface_list) {
 471                 rc = -ENOMEM;
 472                 goto out;
 473         }
 474
 475         info = *iface_list;
 476         bytes_left = buf_len;
 477         p = buf;
 478         while (bytes_left >= sizeof(*p)) {
 479                 info->speed = le64_to_cpu(p->LinkSpeed);
 480                 info->rdma_capable = le32_to_cpu(p->Capability & RDMA_CAPABLE);
 481                 info->rss_capable = le32_to_cpu(p->Capability & RSS_CAPABLE);
 482
 483                 cifs_dbg(FYI, "%s: adding iface %zu\n", __func__, *iface_count);
 484                 cifs_dbg(FYI, "%s: speed %zu bps\n", __func__, info->speed);
 485                 cifs_dbg(FYI, "%s: capabilities 0x%08x\n", __func__,
 486                          le32_to_cpu(p->Capability));
 487
 488                 switch (p->Family) {
 489                 /*
 490                  * The kernel and wire socket structures have the same
 491                  * layout and use network byte order but make the
 492                  * conversion explicit in case either one changes.
 493                  */
 494                 case INTERNETWORK:
 495                         addr4 = (struct sockaddr_in *)&info->sockaddr;
 496                         p4 = (struct iface_info_ipv4 *)p->Buffer;
 497                         addr4->sin_family = AF_INET;
 498                         memcpy(&addr4->sin_addr, &p4->IPv4Address, 4);
 499
 500                         /* [MS-SMB2] 2.2.32.5.1.1 Clients MUST ignore these */
 501                         addr4->sin_port = cpu_to_be16(CIFS_PORT);
 502
 503                         cifs_dbg(FYI, "%s: ipv4 %pI4\n", __func__,
 504                                  &addr4->sin_addr);
 505                         break;
 506                 case INTERNETWORKV6:
 507                         addr6 = (struct sockaddr_in6 *)&info->sockaddr;
 508                         p6 = (struct iface_info_ipv6 *)p->Buffer;
 509                         addr6->sin6_family = AF_INET6;
 510                         memcpy(&addr6->sin6_addr, &p6->IPv6Address, 16);
 511
 512                         /* [MS-SMB2] 2.2.32.5.1.2 Clients MUST ignore these */
 513                         addr6->sin6_flowinfo = 0;
 514                         addr6->sin6_scope_id = 0;
 515                         addr6->sin6_port = cpu_to_be16(CIFS_PORT);
 516
 517                         cifs_dbg(FYI, "%s: ipv6 %pI6\n", __func__,
 518                                  &addr6->sin6_addr);
 519                         break;
 520                 default:
 521                         cifs_dbg(VFS,
 522                                  "%s: skipping unsupported socket family\n",
 523                                  __func__);
 524                         goto next_iface;
 525                 }
 526
 527                 (*iface_count)++;
 528                 info++;
 529 next_iface:
 530                 next = le32_to_cpu(p->Next);
 531                 if (!next)
 532                         break;
 533                 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next);
 534                 bytes_left -= next;
 535         }
 536
 537         if (!*iface_count) {
 538                 rc = -EINVAL;
 539                 goto out;
 540         }
 541
 542 out:
 543         if (rc) {
 544                 kfree(*iface_list);
 545                 *iface_count = 0;
 546                 *iface_list = NULL;
 547         }
 548         return rc;
 549 }
 550
 551 static int compare_iface(const void *ia, const void *ib)
 552 {
 553         const struct cifs_server_iface *a = (struct cifs_server_iface *)ia;
 554         const struct cifs_server_iface *b = (struct cifs_server_iface *)ib;
 555
 556         return a->speed == b->speed ? 0 : (a->speed > b->speed ? -1 : 1);
 557 }
 558
 559 static int
 560 SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon)
 561 {
 562         int rc;
 563         unsigned int ret_data_len = 0;
 564         struct network_interface_info_ioctl_rsp *out_buf = NULL;
 565         struct cifs_server_iface *iface_list;
 566         size_t iface_count;
 567         struct cifs_ses *ses = tcon->ses;
 568
 569         rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
 570                         FSCTL_QUERY_NETWORK_INTERFACE_INFO, true /* is_fsctl */,
 571                         NULL /* no data input */, 0 /* no data input */,
 572                         CIFSMaxBufSize, (char **)&out_buf, &ret_data_len);
 573         if (rc == -EOPNOTSUPP) {
 574                 cifs_dbg(FYI,
 575                          "server does not support query network interfaces\n");
 576                 goto out;
 577         } else if (rc != 0) {
 578                 cifs_tcon_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
 579                 goto out;
 580         }
 581
 582         rc = parse_server_interfaces(out_buf, ret_data_len,
 583                                      &iface_list, &iface_count);
 584         if (rc)
 585                 goto out;
 586
 587         /* sort interfaces from fastest to slowest */
 588         sort(iface_list, iface_count, sizeof(*iface_list), compare_iface, NULL);
 589
 590         spin_lock(&ses->iface_lock);
 591         kfree(ses->iface_list);
 592         ses->iface_list = iface_list;
 593         ses->iface_count = iface_count;
 594         ses->iface_last_update = jiffies;
 595         spin_unlock(&ses->iface_lock);
 596
 597 out:
 598         kfree(out_buf);
 599         return rc;
 600 }
 601
 602 static void
 603 smb2_close_cached_fid(struct kref *ref)
 604 {
 605         struct cached_fid *cfid = container_of(ref, struct cached_fid,
 606                                                refcount);
 607
 608         if (cfid->is_valid) {
 609                 cifs_dbg(FYI, "clear cached root file handle\n");
 610                 SMB2_close(0, cfid->tcon, cfid->fid->persistent_fid,
 611                            cfid->fid->volatile_fid);
 612                 cfid->is_valid = false;
 613                 cfid->file_all_info_is_valid = false;
 614                 cfid->has_lease = false;
 615         }
 616 }
 617
 618 void close_shroot(struct cached_fid *cfid)
 619 {
 620         mutex_lock(&cfid->fid_mutex);
 621         kref_put(&cfid->refcount, smb2_close_cached_fid);
 622         mutex_unlock(&cfid->fid_mutex);
 623 }
 624
 625 void close_shroot_lease_locked(struct cached_fid *cfid)
 626 {
 627         if (cfid->has_lease) {
 628                 cfid->has_lease = false;
 629                 kref_put(&cfid->refcount, smb2_close_cached_fid);
 630         }
 631 }
 632
 633 void close_shroot_lease(struct cached_fid *cfid)
 634 {
 635         mutex_lock(&cfid->fid_mutex);
 636         close_shroot_lease_locked(cfid);
 637         mutex_unlock(&cfid->fid_mutex);
 638 }
 639
 640 void
 641 smb2_cached_lease_break(struct work_struct *work)
 642 {
 643         struct cached_fid *cfid = container_of(work,
 644                                 struct cached_fid, lease_break);
 645
 646         close_shroot_lease(cfid);
 647 }
 648
 649 /*
 650  * Open the directory at the root of a share
 651  */
 652 int open_shroot(unsigned int xid, struct cifs_tcon *tcon,
 653                 struct cifs_sb_info *cifs_sb, struct cifs_fid *pfid)
 654 {
 655         struct cifs_ses *ses = tcon->ses;
 656         struct TCP_Server_Info *server = ses->server;
 657         struct cifs_open_parms oparms;
 658         struct smb2_create_rsp *o_rsp = NULL;
 659         struct smb2_query_info_rsp *qi_rsp = NULL;
 660         int resp_buftype[2];
 661         struct smb_rqst rqst[2];
 662         struct kvec rsp_iov[2];
 663         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
 664         struct kvec qi_iov[1];
 665         int rc, flags = 0;
 666         __le16 utf16_path = 0; /* Null - since an open of top of share */
 667         u8 oplock = SMB2_OPLOCK_LEVEL_II;
 668
 669         mutex_lock(&tcon->crfid.fid_mutex);
 670         if (tcon->crfid.is_valid) {
 671                 cifs_dbg(FYI, "found a cached root file handle\n");
 672                 memcpy(pfid, tcon->crfid.fid, sizeof(struct cifs_fid));
 673                 kref_get(&tcon->crfid.refcount);
 674                 mutex_unlock(&tcon->crfid.fid_mutex);
 675                 return 0;
 676         }
 677
 678         /*
 679          * We do not hold the lock for the open because in case
 680          * SMB2_open needs to reconnect, it will end up calling
 681          * cifs_mark_open_files_invalid() which takes the lock again
 682          * thus causing a deadlock
 683          */
 684
 685         mutex_unlock(&tcon->crfid.fid_mutex);
 686
 687         if (smb3_encryption_required(tcon))
 688                 flags |= CIFS_TRANSFORM_REQ;
 689
 690         memset(rqst, 0, sizeof(rqst));
 691         resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER;
 692         memset(rsp_iov, 0, sizeof(rsp_iov));
 693
 694         /* Open */
 695         memset(&open_iov, 0, sizeof(open_iov));
 696         rqst[0].rq_iov = open_iov;
 697         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
 698
 699         oparms.tcon = tcon;
 700         oparms.create_options = cifs_create_options(cifs_sb, 0);
 701         oparms.desired_access = FILE_READ_ATTRIBUTES;
 702         oparms.disposition = FILE_OPEN;
 703         oparms.fid = pfid;
 704         oparms.reconnect = false;
 705
 706         rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, &utf16_path);
 707         if (rc)
 708                 goto oshr_free;
 709         smb2_set_next_command(tcon, &rqst[0]);
 710
 711         memset(&qi_iov, 0, sizeof(qi_iov));
 712         rqst[1].rq_iov = qi_iov;
 713         rqst[1].rq_nvec = 1;
 714
 715         rc = SMB2_query_info_init(tcon, &rqst[1], COMPOUND_FID,
 716                                   COMPOUND_FID, FILE_ALL_INFORMATION,
 717                                   SMB2_O_INFO_FILE, 0,
 718                                   sizeof(struct smb2_file_all_info) +
 719                                   PATH_MAX * 2, 0, NULL);
 720         if (rc)
 721                 goto oshr_free;
 722
 723         smb2_set_related(&rqst[1]);
 724
 725         rc = compound_send_recv(xid, ses, flags, 2, rqst,
 726                                 resp_buftype, rsp_iov);
 727         mutex_lock(&tcon->crfid.fid_mutex);
 728
 729         /*
 730          * Now we need to check again as the cached root might have
 731          * been successfully re-opened from a concurrent process
 732          */
 733
 734         if (tcon->crfid.is_valid) {
 735                 /* work was already done */
 736
 737                 /* stash fids for close() later */
 738                 struct cifs_fid fid = {
 739                         .persistent_fid = pfid->persistent_fid,
 740                         .volatile_fid = pfid->volatile_fid,
 741                 };
 742
 743                 /*
 744                  * caller expects this func to set pfid to a valid
 745                  * cached root, so we copy the existing one and get a
 746                  * reference.
 747                  */
 748                 memcpy(pfid, tcon->crfid.fid, sizeof(*pfid));
 749                 kref_get(&tcon->crfid.refcount);
 750
 751                 mutex_unlock(&tcon->crfid.fid_mutex);
 752
 753                 if (rc == 0) {
 754                         /* close extra handle outside of crit sec */
 755                         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 756                 }
 757                 goto oshr_free;
 758         }
 759
 760         /* Cached root is still invalid, continue normaly */
 761
 762         if (rc) {
 763                 if (rc == -EREMCHG) {
 764                         tcon->need_reconnect = true;
 765                         printk_once(KERN_WARNING "server share %s deleted\n",
 766                                     tcon->treeName);
 767                 }
 768                 goto oshr_exit;
 769         }
 770
 771         atomic_inc(&tcon->num_remote_opens);
 772
 773         o_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base;
 774         oparms.fid->persistent_fid = o_rsp->PersistentFileId;
 775         oparms.fid->volatile_fid = o_rsp->VolatileFileId;
 776 #ifdef CONFIG_CIFS_DEBUG2
 777         oparms.fid->mid = le64_to_cpu(o_rsp->sync_hdr.MessageId);
 778 #endif /* CIFS_DEBUG2 */
 779
 780         memcpy(tcon->crfid.fid, pfid, sizeof(struct cifs_fid));
 781         tcon->crfid.tcon = tcon;
 782         tcon->crfid.is_valid = true;
 783         kref_init(&tcon->crfid.refcount);
 784
 785         /* BB TBD check to see if oplock level check can be removed below */
 786         if (o_rsp->OplockLevel == SMB2_OPLOCK_LEVEL_LEASE) {
 787                 kref_get(&tcon->crfid.refcount);
 788                 tcon->crfid.has_lease = true;
 789                 smb2_parse_contexts(server, o_rsp,
 790                                 &oparms.fid->epoch,
 791                                     oparms.fid->lease_key, &oplock,
 792                                     NULL, NULL);
 793         } else
 794                 goto oshr_exit;
 795
 796         qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
 797         if (le32_to_cpu(qi_rsp->OutputBufferLength) < sizeof(struct smb2_file_all_info))
 798                 goto oshr_exit;
 799         if (!smb2_validate_and_copy_iov(
 800                                 le16_to_cpu(qi_rsp->OutputBufferOffset),
 801                                 sizeof(struct smb2_file_all_info),
 802                                 &rsp_iov[1], sizeof(struct smb2_file_all_info),
 803                                 (char *)&tcon->crfid.file_all_info))
 804                 tcon->crfid.file_all_info_is_valid = true;
 805
 806 oshr_exit:
 807         mutex_unlock(&tcon->crfid.fid_mutex);
 808 oshr_free:
 809         SMB2_open_free(&rqst[0]);
 810         SMB2_query_info_free(&rqst[1]);
 811         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
 812         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
 813         return rc;
 814 }
 815
 816 static void
 817 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon,
 818               struct cifs_sb_info *cifs_sb)
 819 {
 820         int rc;
 821         __le16 srch_path = 0; /* Null - open root of share */
 822         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 823         struct cifs_open_parms oparms;
 824         struct cifs_fid fid;
 825         bool no_cached_open = tcon->nohandlecache;
 826
 827         oparms.tcon = tcon;
 828         oparms.desired_access = FILE_READ_ATTRIBUTES;
 829         oparms.disposition = FILE_OPEN;
 830         oparms.create_options = cifs_create_options(cifs_sb, 0);
 831         oparms.fid = &fid;
 832         oparms.reconnect = false;
 833
 834         if (no_cached_open)
 835                 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
 836                                NULL, NULL);
 837         else
 838                 rc = open_shroot(xid, tcon, cifs_sb, &fid);
 839
 840         if (rc)
 841                 return;
 842
 843         SMB3_request_interfaces(xid, tcon);
 844
 845         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 846                         FS_ATTRIBUTE_INFORMATION);
 847         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 848                         FS_DEVICE_INFORMATION);
 849         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 850                         FS_VOLUME_INFORMATION);
 851         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 852                         FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
 853         if (no_cached_open)
 854                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 855         else
 856                 close_shroot(&tcon->crfid);
 857 }
 858
 859 static void
 860 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon,
 861               struct cifs_sb_info *cifs_sb)
 862 {
 863         int rc;
 864         __le16 srch_path = 0; /* Null - open root of share */
 865         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 866         struct cifs_open_parms oparms;
 867         struct cifs_fid fid;
 868
 869         oparms.tcon = tcon;
 870         oparms.desired_access = FILE_READ_ATTRIBUTES;
 871         oparms.disposition = FILE_OPEN;
 872         oparms.create_options = cifs_create_options(cifs_sb, 0);
 873         oparms.fid = &fid;
 874         oparms.reconnect = false;
 875
 876         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
 877                        NULL, NULL);
 878         if (rc)
 879                 return;
 880
 881         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 882                         FS_ATTRIBUTE_INFORMATION);
 883         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 884                         FS_DEVICE_INFORMATION);
 885         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 886 }
 887
 888 static int
 889 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
 890                         struct cifs_sb_info *cifs_sb, const char *full_path)
 891 {
 892         int rc;
 893         __le16 *utf16_path;
 894         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 895         struct cifs_open_parms oparms;
 896         struct cifs_fid fid;
 897
 898         if ((*full_path == 0) && tcon->crfid.is_valid)
 899                 return 0;
 900
 901         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
 902         if (!utf16_path)
 903                 return -ENOMEM;
 904
 905         oparms.tcon = tcon;
 906         oparms.desired_access = FILE_READ_ATTRIBUTES;
 907         oparms.disposition = FILE_OPEN;
 908         oparms.create_options = cifs_create_options(cifs_sb, 0);
 909         oparms.fid = &fid;
 910         oparms.reconnect = false;
 911
 912         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,
 913                        NULL);
 914         if (rc) {
 915                 kfree(utf16_path);
 916                 return rc;
 917         }
 918
 919         rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 920         kfree(utf16_path);
 921         return rc;
 922 }
 923
 924 static int
 925 smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
 926                   struct cifs_sb_info *cifs_sb, const char *full_path,
 927                   u64 *uniqueid, FILE_ALL_INFO *data)
 928 {
 929         *uniqueid = le64_to_cpu(data->IndexNumber);
 930         return 0;
 931 }
 932
 933 static int
 934 smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
 935                      struct cifs_fid *fid, FILE_ALL_INFO *data)
 936 {
 937         int rc;
 938         struct smb2_file_all_info *smb2_data;
 939
 940         smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
 941                             GFP_KERNEL);
 942         if (smb2_data == NULL)
 943                 return -ENOMEM;
 944
 945         rc = SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid,
 946                              smb2_data);
 947         if (!rc)
 948                 move_smb2_info_to_cifs(data, smb2_data);
 949         kfree(smb2_data);
 950         return rc;
 951 }
 952
 953 #ifdef CONFIG_CIFS_XATTR
 954 static ssize_t
 955 move_smb2_ea_to_cifs(char *dst, size_t dst_size,
 956                      struct smb2_file_full_ea_info *src, size_t src_size,
 957                      const unsigned char *ea_name)
 958 {
 959         int rc = 0;
 960         unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0;
 961         char *name, *value;
 962         size_t buf_size = dst_size;
 963         size_t name_len, value_len, user_name_len;
 964
 965         while (src_size > 0) {
 966                 name = &src->ea_data[0];
 967                 name_len = (size_t)src->ea_name_length;
 968                 value = &src->ea_data[src->ea_name_length + 1];
 969                 value_len = (size_t)le16_to_cpu(src->ea_value_length);
 970
 971                 if (name_len == 0)
 972                         break;
 973
 974                 if (src_size < 8 + name_len + 1 + value_len) {
 975                         cifs_dbg(FYI, "EA entry goes beyond length of list\n");
 976                         rc = -EIO;
 977                         goto out;
 978                 }
 979
 980                 if (ea_name) {
 981                         if (ea_name_len == name_len &&
 982                             memcmp(ea_name, name, name_len) == 0) {
 983                                 rc = value_len;
 984                                 if (dst_size == 0)
 985                                         goto out;
 986                                 if (dst_size < value_len) {
 987                                         rc = -ERANGE;
 988                                         goto out;
 989                                 }
 990                                 memcpy(dst, value, value_len);
 991                                 goto out;
 992                         }
 993                 } else {
 994                         /* 'user.' plus a terminating null */
 995                         user_name_len = 5 + 1 + name_len;
 996
 997                         if (buf_size == 0) {
 998                                 /* skip copy - calc size only */
 999                                 rc += user_name_len;
1000                         } else if (dst_size >= user_name_len) {
1001                                 dst_size -= user_name_len;
1002                                 memcpy(dst, "user.", 5);
1003                                 dst += 5;
1004                                 memcpy(dst, src->ea_data, name_len);
1005                                 dst += name_len;
1006                                 *dst = 0;
1007                                 ++dst;
1008                                 rc += user_name_len;
1009                         } else {
1010                                 /* stop before overrun buffer */
1011                                 rc = -ERANGE;
1012                                 break;
1013                         }
1014                 }
1015
1016                 if (!src->next_entry_offset)
1017                         break;
1018
1019                 if (src_size < le32_to_cpu(src->next_entry_offset)) {
1020                         /* stop before overrun buffer */
1021                         rc = -ERANGE;
1022                         break;
1023                 }
1024                 src_size -= le32_to_cpu(src->next_entry_offset);
1025                 src = (void *)((char *)src +
1026                                le32_to_cpu(src->next_entry_offset));
1027         }
1028
1029         /* didn't find the named attribute */
1030         if (ea_name)
1031                 rc = -ENODATA;
1032
1033 out:
1034         return (ssize_t)rc;
1035 }
1036
1037 static ssize_t
1038 smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon,
1039                const unsigned char *path, const unsigned char *ea_name,
1040                char *ea_data, size_t buf_size,
1041                struct cifs_sb_info *cifs_sb)
1042 {
1043         int rc;
1044         __le16 *utf16_path;
1045         struct kvec rsp_iov = {NULL, 0};
1046         int buftype = CIFS_NO_BUFFER;
1047         struct smb2_query_info_rsp *rsp;
1048         struct smb2_file_full_ea_info *info = NULL;
1049
1050         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1051         if (!utf16_path)
1052                 return -ENOMEM;
1053
1054         rc = smb2_query_info_compound(xid, tcon, utf16_path,
1055                                       FILE_READ_EA,
1056                                       FILE_FULL_EA_INFORMATION,
1057                                       SMB2_O_INFO_FILE,
1058                                       CIFSMaxBufSize -
1059                                       MAX_SMB2_CREATE_RESPONSE_SIZE -
1060                                       MAX_SMB2_CLOSE_RESPONSE_SIZE,
1061                                       &rsp_iov, &buftype, cifs_sb);
1062         if (rc) {
1063                 /*
1064                  * If ea_name is NULL (listxattr) and there are no EAs,
1065                  * return 0 as it's not an error. Otherwise, the specified
1066                  * ea_name was not found.
1067                  */
1068                 if (!ea_name && rc == -ENODATA)
1069                         rc = 0;
1070                 goto qeas_exit;
1071         }
1072
1073         rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
1074         rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
1075                                le32_to_cpu(rsp->OutputBufferLength),
1076                                &rsp_iov,
1077                                sizeof(struct smb2_file_full_ea_info));
1078         if (rc)
1079                 goto qeas_exit;
1080
1081         info = (struct smb2_file_full_ea_info *)(
1082                         le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
1083         rc = move_smb2_ea_to_cifs(ea_data, buf_size, info,
1084                         le32_to_cpu(rsp->OutputBufferLength), ea_name);
1085
1086  qeas_exit:
1087         kfree(utf16_path);
1088         free_rsp_buf(buftype, rsp_iov.iov_base);
1089         return rc;
1090 }
1091
1092
1093 static int
1094 smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
1095             const char *path, const char *ea_name, const void *ea_value,
1096             const __u16 ea_value_len, const struct nls_table *nls_codepage,
1097             struct cifs_sb_info *cifs_sb)
1098 {
1099         struct cifs_ses *ses = tcon->ses;
1100         __le16 *utf16_path = NULL;
1101         int ea_name_len = strlen(ea_name);
1102         int flags = 0;
1103         int len;
1104         struct smb_rqst rqst[3];
1105         int resp_buftype[3];
1106         struct kvec rsp_iov[3];
1107         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
1108         struct cifs_open_parms oparms;
1109         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1110         struct cifs_fid fid;
1111         struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE];
1112         unsigned int size[1];
1113         void *data[1];
1114         struct smb2_file_full_ea_info *ea = NULL;
1115         struct kvec close_iov[1];
1116         struct smb2_query_info_rsp *rsp;
1117         int rc, used_len = 0;
1118
1119         if (smb3_encryption_required(tcon))
1120                 flags |= CIFS_TRANSFORM_REQ;
1121
1122         if (ea_name_len > 255)
1123                 return -EINVAL;
1124
1125         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1126         if (!utf16_path)
1127                 return -ENOMEM;
1128
1129         memset(rqst, 0, sizeof(rqst));
1130         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1131         memset(rsp_iov, 0, sizeof(rsp_iov));
1132
1133         if (ses->server->ops->query_all_EAs) {
1134                 if (!ea_value) {
1135                         rc = ses->server->ops->query_all_EAs(xid, tcon, path,
1136                                                              ea_name, NULL, 0,
1137                                                              cifs_sb);
1138                         if (rc == -ENODATA)
1139                                 goto sea_exit;
1140                 } else {
1141                         /* If we are adding a attribute we should first check
1142                          * if there will be enough space available to store
1143                          * the new EA. If not we should not add it since we
1144                          * would not be able to even read the EAs back.
1145                          */
1146                         rc = smb2_query_info_compound(xid, tcon, utf16_path,
1147                                       FILE_READ_EA,
1148                                       FILE_FULL_EA_INFORMATION,
1149                                       SMB2_O_INFO_FILE,
1150                                       CIFSMaxBufSize -
1151                                       MAX_SMB2_CREATE_RESPONSE_SIZE -
1152                                       MAX_SMB2_CLOSE_RESPONSE_SIZE,
1153                                       &rsp_iov[1], &resp_buftype[1], cifs_sb);
1154                         if (rc == 0) {
1155                                 rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
1156                                 used_len = le32_to_cpu(rsp->OutputBufferLength);
1157                         }
1158                         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1159                         resp_buftype[1] = CIFS_NO_BUFFER;
1160                         memset(&rsp_iov[1], 0, sizeof(rsp_iov[1]));
1161                         rc = 0;
1162
1163                         /* Use a fudge factor of 256 bytes in case we collide
1164                          * with a different set_EAs command.
1165                          */
1166                         if(CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE -
1167                            MAX_SMB2_CLOSE_RESPONSE_SIZE - 256 <
1168                            used_len + ea_name_len + ea_value_len + 1) {
1169                                 rc = -ENOSPC;
1170                                 goto sea_exit;
1171                         }
1172                 }
1173         }
1174
1175         /* Open */
1176         memset(&open_iov, 0, sizeof(open_iov));
1177         rqst[0].rq_iov = open_iov;
1178         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1179
1180         memset(&oparms, 0, sizeof(oparms));
1181         oparms.tcon = tcon;
1182         oparms.desired_access = FILE_WRITE_EA;
1183         oparms.disposition = FILE_OPEN;
1184         oparms.create_options = cifs_create_options(cifs_sb, 0);
1185         oparms.fid = &fid;
1186         oparms.reconnect = false;
1187
1188         rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, utf16_path);
1189         if (rc)
1190                 goto sea_exit;
1191         smb2_set_next_command(tcon, &rqst[0]);
1192
1193
1194         /* Set Info */
1195         memset(&si_iov, 0, sizeof(si_iov));
1196         rqst[1].rq_iov = si_iov;
1197         rqst[1].rq_nvec = 1;
1198
1199         len = sizeof(ea) + ea_name_len + ea_value_len + 1;
1200         ea = kzalloc(len, GFP_KERNEL);
1201         if (ea == NULL) {
1202                 rc = -ENOMEM;
1203                 goto sea_exit;
1204         }
1205
1206         ea->ea_name_length = ea_name_len;
1207         ea->ea_value_length = cpu_to_le16(ea_value_len);
1208         memcpy(ea->ea_data, ea_name, ea_name_len + 1);
1209         memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len);
1210
1211         size[0] = len;
1212         data[0] = ea;
1213
1214         rc = SMB2_set_info_init(tcon, &rqst[1], COMPOUND_FID,
1215                                 COMPOUND_FID, current->tgid,
1216                                 FILE_FULL_EA_INFORMATION,
1217                                 SMB2_O_INFO_FILE, 0, data, size);
1218         smb2_set_next_command(tcon, &rqst[1]);
1219         smb2_set_related(&rqst[1]);
1220
1221
1222         /* Close */
1223         memset(&close_iov, 0, sizeof(close_iov));
1224         rqst[2].rq_iov = close_iov;
1225         rqst[2].rq_nvec = 1;
1226         rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
1227         smb2_set_related(&rqst[2]);
1228
1229         rc = compound_send_recv(xid, ses, flags, 3, rqst,
1230                                 resp_buftype, rsp_iov);
1231         /* no need to bump num_remote_opens because handle immediately closed */
1232
1233  sea_exit:
1234         kfree(ea);
1235         kfree(utf16_path);
1236         SMB2_open_free(&rqst[0]);
1237         SMB2_set_info_free(&rqst[1]);
1238         SMB2_close_free(&rqst[2]);
1239         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1240         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1241         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1242         return rc;
1243 }
1244 #endif
1245
1246 static bool
1247 smb2_can_echo(struct TCP_Server_Info *server)
1248 {
1249         return server->echoes;
1250 }
1251
1252 static void
1253 smb2_clear_stats(struct cifs_tcon *tcon)
1254 {
1255         int i;
1256
1257         for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
1258                 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
1259                 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
1260         }
1261 }
1262
1263 static void
1264 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
1265 {
1266         seq_puts(m, "\n\tShare Capabilities:");
1267         if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
1268                 seq_puts(m, " DFS,");
1269         if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
1270                 seq_puts(m, " CONTINUOUS AVAILABILITY,");
1271         if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
1272                 seq_puts(m, " SCALEOUT,");
1273         if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
1274                 seq_puts(m, " CLUSTER,");
1275         if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
1276                 seq_puts(m, " ASYMMETRIC,");
1277         if (tcon->capabilities == 0)
1278                 seq_puts(m, " None");
1279         if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
1280                 seq_puts(m, " Aligned,");
1281         if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
1282                 seq_puts(m, " Partition Aligned,");
1283         if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
1284                 seq_puts(m, " SSD,");
1285         if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
1286                 seq_puts(m, " TRIM-support,");
1287
1288         seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
1289         seq_printf(m, "\n\ttid: 0x%x", tcon->tid);
1290         if (tcon->perf_sector_size)
1291                 seq_printf(m, "\tOptimal sector size: 0x%x",
1292                            tcon->perf_sector_size);
1293         seq_printf(m, "\tMaximal Access: 0x%x", tcon->maximal_access);
1294 }
1295
1296 static void
1297 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
1298 {
1299         atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
1300         atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
1301
1302         /*
1303          *  Can't display SMB2_NEGOTIATE, SESSION_SETUP, LOGOFF, CANCEL and ECHO
1304          *  totals (requests sent) since those SMBs are per-session not per tcon
1305          */
1306         seq_printf(m, "\nBytes read: %llu  Bytes written: %llu",
1307                    (long long)(tcon->bytes_read),
1308                    (long long)(tcon->bytes_written));
1309         seq_printf(m, "\nOpen files: %d total (local), %d open on server",
1310                    atomic_read(&tcon->num_local_opens),
1311                    atomic_read(&tcon->num_remote_opens));
1312         seq_printf(m, "\nTreeConnects: %d total %d failed",
1313                    atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
1314                    atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
1315         seq_printf(m, "\nTreeDisconnects: %d total %d failed",
1316                    atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
1317                    atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
1318         seq_printf(m, "\nCreates: %d total %d failed",
1319                    atomic_read(&sent[SMB2_CREATE_HE]),
1320                    atomic_read(&failed[SMB2_CREATE_HE]));
1321         seq_printf(m, "\nCloses: %d total %d failed",
1322                    atomic_read(&sent[SMB2_CLOSE_HE]),
1323                    atomic_read(&failed[SMB2_CLOSE_HE]));
1324         seq_printf(m, "\nFlushes: %d total %d failed",
1325                    atomic_read(&sent[SMB2_FLUSH_HE]),
1326                    atomic_read(&failed[SMB2_FLUSH_HE]));
1327         seq_printf(m, "\nReads: %d total %d failed",
1328                    atomic_read(&sent[SMB2_READ_HE]),
1329                    atomic_read(&failed[SMB2_READ_HE]));
1330         seq_printf(m, "\nWrites: %d total %d failed",
1331                    atomic_read(&sent[SMB2_WRITE_HE]),
1332                    atomic_read(&failed[SMB2_WRITE_HE]));
1333         seq_printf(m, "\nLocks: %d total %d failed",
1334                    atomic_read(&sent[SMB2_LOCK_HE]),
1335                    atomic_read(&failed[SMB2_LOCK_HE]));
1336         seq_printf(m, "\nIOCTLs: %d total %d failed",
1337                    atomic_read(&sent[SMB2_IOCTL_HE]),
1338                    atomic_read(&failed[SMB2_IOCTL_HE]));
1339         seq_printf(m, "\nQueryDirectories: %d total %d failed",
1340                    atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
1341                    atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
1342         seq_printf(m, "\nChangeNotifies: %d total %d failed",
1343                    atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
1344                    atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
1345         seq_printf(m, "\nQueryInfos: %d total %d failed",
1346                    atomic_read(&sent[SMB2_QUERY_INFO_HE]),
1347                    atomic_read(&failed[SMB2_QUERY_INFO_HE]));
1348         seq_printf(m, "\nSetInfos: %d total %d failed",
1349                    atomic_read(&sent[SMB2_SET_INFO_HE]),
1350                    atomic_read(&failed[SMB2_SET_INFO_HE]));
1351         seq_printf(m, "\nOplockBreaks: %d sent %d failed",
1352                    atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
1353                    atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
1354 }
1355
1356 static void
1357 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
1358 {
1359         struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
1360         struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
1361
1362         cfile->fid.persistent_fid = fid->persistent_fid;
1363         cfile->fid.volatile_fid = fid->volatile_fid;
1364         cfile->fid.access = fid->access;
1365 #ifdef CONFIG_CIFS_DEBUG2
1366         cfile->fid.mid = fid->mid;
1367 #endif /* CIFS_DEBUG2 */
1368         server->ops->set_oplock_level(cinode, oplock, fid->epoch,
1369                                       &fid->purge_cache);
1370         cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
1371         memcpy(cfile->fid.create_guid, fid->create_guid, 16);
1372 }
1373
1374 static void
1375 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
1376                 struct cifs_fid *fid)
1377 {
1378         SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1379 }
1380
1381 static void
1382 smb2_close_getattr(const unsigned int xid, struct cifs_tcon *tcon,
1383                    struct cifsFileInfo *cfile)
1384 {
1385         struct smb2_file_network_open_info file_inf;
1386         struct inode *inode;
1387         int rc;
1388
1389         rc = __SMB2_close(xid, tcon, cfile->fid.persistent_fid,
1390                    cfile->fid.volatile_fid, &file_inf);
1391         if (rc)
1392                 return;
1393
1394         inode = d_inode(cfile->dentry);
1395
1396         spin_lock(&inode->i_lock);
1397         CIFS_I(inode)->time = jiffies;
1398
1399         /* Creation time should not need to be updated on close */
1400         if (file_inf.LastWriteTime)
1401                 inode->i_mtime = cifs_NTtimeToUnix(file_inf.LastWriteTime);
1402         if (file_inf.ChangeTime)
1403                 inode->i_ctime = cifs_NTtimeToUnix(file_inf.ChangeTime);
1404         if (file_inf.LastAccessTime)
1405                 inode->i_atime = cifs_NTtimeToUnix(file_inf.LastAccessTime);
1406
1407         /*
1408          * i_blocks is not related to (i_size / i_blksize),
1409          * but instead 512 byte (2**9) size is required for
1410          * calculating num blocks.
1411          */
1412         if (le64_to_cpu(file_inf.AllocationSize) > 4096)
1413                 inode->i_blocks =
1414                         (512 - 1 + le64_to_cpu(file_inf.AllocationSize)) >> 9;
1415
1416         /* End of file and Attributes should not have to be updated on close */
1417         spin_unlock(&inode->i_lock);
1418 }
1419
1420 static int
1421 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
1422                      u64 persistent_fid, u64 volatile_fid,
1423                      struct copychunk_ioctl *pcchunk)
1424 {
1425         int rc;
1426         unsigned int ret_data_len;
1427         struct resume_key_req *res_key;
1428
1429         rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
1430                         FSCTL_SRV_REQUEST_RESUME_KEY, true /* is_fsctl */,
1431                         NULL, 0 /* no input */, CIFSMaxBufSize,
1432                         (char **)&res_key, &ret_data_len);
1433
1434         if (rc) {
1435                 cifs_tcon_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
1436                 goto req_res_key_exit;
1437         }
1438         if (ret_data_len < sizeof(struct resume_key_req)) {
1439                 cifs_tcon_dbg(VFS, "Invalid refcopy resume key length\n");
1440                 rc = -EINVAL;
1441                 goto req_res_key_exit;
1442         }
1443         memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
1444
1445 req_res_key_exit:
1446         kfree(res_key);
1447         return rc;
1448 }
1449
1450 static int
1451 smb2_ioctl_query_info(const unsigned int xid,
1452                       struct cifs_tcon *tcon,
1453                       struct cifs_sb_info *cifs_sb,
1454                       __le16 *path, int is_dir,
1455                       unsigned long p)
1456 {
1457         struct cifs_ses *ses = tcon->ses;
1458         char __user *arg = (char __user *)p;
1459         struct smb_query_info qi;
1460         struct smb_query_info __user *pqi;
1461         int rc = 0;
1462         int flags = 0;
1463         struct smb2_query_info_rsp *qi_rsp = NULL;
1464         struct smb2_ioctl_rsp *io_rsp = NULL;
1465         void *buffer = NULL;
1466         struct smb_rqst rqst[3];
1467         int resp_buftype[3];
1468         struct kvec rsp_iov[3];
1469         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
1470         struct cifs_open_parms oparms;
1471         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1472         struct cifs_fid fid;
1473         struct kvec qi_iov[1];
1474         struct kvec io_iov[SMB2_IOCTL_IOV_SIZE];
1475         struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE];
1476         struct kvec close_iov[1];
1477         unsigned int size[2];
1478         void *data[2];
1479         int create_options = is_dir ? CREATE_NOT_FILE : CREATE_NOT_DIR;
1480
1481         memset(rqst, 0, sizeof(rqst));
1482         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1483         memset(rsp_iov, 0, sizeof(rsp_iov));
1484
1485         if (copy_from_user(&qi, arg, sizeof(struct smb_query_info)))
1486                 return -EFAULT;
1487
1488         if (qi.output_buffer_length > 1024)
1489                 return -EINVAL;
1490
1491         if (!ses || !(ses->server))
1492                 return -EIO;
1493
1494         if (smb3_encryption_required(tcon))
1495                 flags |= CIFS_TRANSFORM_REQ;
1496
1497         buffer = memdup_user(arg + sizeof(struct smb_query_info),
1498                              qi.output_buffer_length);
1499         if (IS_ERR(buffer))
1500                 return PTR_ERR(buffer);
1501
1502         /* Open */
1503         memset(&open_iov, 0, sizeof(open_iov));
1504         rqst[0].rq_iov = open_iov;
1505         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1506
1507         memset(&oparms, 0, sizeof(oparms));
1508         oparms.tcon = tcon;
1509         oparms.disposition = FILE_OPEN;
1510         oparms.create_options = cifs_create_options(cifs_sb, create_options);
1511         oparms.fid = &fid;
1512         oparms.reconnect = false;
1513
1514         if (qi.flags & PASSTHRU_FSCTL) {
1515                 switch (qi.info_type & FSCTL_DEVICE_ACCESS_MASK) {
1516                 case FSCTL_DEVICE_ACCESS_FILE_READ_WRITE_ACCESS:
1517                         oparms.desired_access = FILE_READ_DATA | FILE_WRITE_DATA | FILE_READ_ATTRIBUTES | SYNCHRONIZE;
1518                         break;
1519                 case FSCTL_DEVICE_ACCESS_FILE_ANY_ACCESS:
1520                         oparms.desired_access = GENERIC_ALL;
1521                         break;
1522                 case FSCTL_DEVICE_ACCESS_FILE_READ_ACCESS:
1523                         oparms.desired_access = GENERIC_READ;
1524                         break;
1525                 case FSCTL_DEVICE_ACCESS_FILE_WRITE_ACCESS:
1526                         oparms.desired_access = GENERIC_WRITE;
1527                         break;
1528                 }
1529         } else if (qi.flags & PASSTHRU_SET_INFO) {
1530                 oparms.desired_access = GENERIC_WRITE;
1531         } else {
1532                 oparms.desired_access = FILE_READ_ATTRIBUTES | READ_CONTROL;
1533         }
1534
1535         rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, path);
1536         if (rc)
1537                 goto iqinf_exit;
1538         smb2_set_next_command(tcon, &rqst[0]);
1539
1540         /* Query */
1541         if (qi.flags & PASSTHRU_FSCTL) {
1542                 /* Can eventually relax perm check since server enforces too */
1543                 if (!capable(CAP_SYS_ADMIN))
1544                         rc = -EPERM;
1545                 else  {
1546                         memset(&io_iov, 0, sizeof(io_iov));
1547                         rqst[1].rq_iov = io_iov;
1548                         rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
1549
1550                         rc = SMB2_ioctl_init(tcon, &rqst[1],
1551                                              COMPOUND_FID, COMPOUND_FID,
1552                                              qi.info_type, true, buffer,
1553                                              qi.output_buffer_length,
1554                                              CIFSMaxBufSize -
1555                                              MAX_SMB2_CREATE_RESPONSE_SIZE -
1556                                              MAX_SMB2_CLOSE_RESPONSE_SIZE);
1557                 }
1558         } else if (qi.flags == PASSTHRU_SET_INFO) {
1559                 /* Can eventually relax perm check since server enforces too */
1560                 if (!capable(CAP_SYS_ADMIN))
1561                         rc = -EPERM;
1562                 else  {
1563                         memset(&si_iov, 0, sizeof(si_iov));
1564                         rqst[1].rq_iov = si_iov;
1565                         rqst[1].rq_nvec = 1;
1566
1567                         size[0] = 8;
1568                         data[0] = buffer;
1569
1570                         rc = SMB2_set_info_init(tcon, &rqst[1],
1571                                         COMPOUND_FID, COMPOUND_FID,
1572                                         current->tgid,
1573                                         FILE_END_OF_FILE_INFORMATION,
1574                                         SMB2_O_INFO_FILE, 0, data, size);
1575                 }
1576         } else if (qi.flags == PASSTHRU_QUERY_INFO) {
1577                 memset(&qi_iov, 0, sizeof(qi_iov));
1578                 rqst[1].rq_iov = qi_iov;
1579                 rqst[1].rq_nvec = 1;
1580
1581                 rc = SMB2_query_info_init(tcon, &rqst[1], COMPOUND_FID,
1582                                   COMPOUND_FID, qi.file_info_class,
1583                                   qi.info_type, qi.additional_information,
1584                                   qi.input_buffer_length,
1585                                   qi.output_buffer_length, buffer);
1586         } else { /* unknown flags */
1587                 cifs_tcon_dbg(VFS, "invalid passthru query flags: 0x%x\n", qi.flags);
1588                 rc = -EINVAL;
1589         }
1590
1591         if (rc)
1592                 goto iqinf_exit;
1593         smb2_set_next_command(tcon, &rqst[1]);
1594         smb2_set_related(&rqst[1]);
1595
1596         /* Close */
1597         memset(&close_iov, 0, sizeof(close_iov));
1598         rqst[2].rq_iov = close_iov;
1599         rqst[2].rq_nvec = 1;
1600
1601         rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
1602         if (rc)
1603                 goto iqinf_exit;
1604         smb2_set_related(&rqst[2]);
1605
1606         rc = compound_send_recv(xid, ses, flags, 3, rqst,
1607                                 resp_buftype, rsp_iov);
1608         if (rc)
1609                 goto iqinf_exit;
1610
1611         /* No need to bump num_remote_opens since handle immediately closed */
1612         if (qi.flags & PASSTHRU_FSCTL) {
1613                 pqi = (struct smb_query_info __user *)arg;
1614                 io_rsp = (struct smb2_ioctl_rsp *)rsp_iov[1].iov_base;
1615                 if (le32_to_cpu(io_rsp->OutputCount) < qi.input_buffer_length)
1616                         qi.input_buffer_length = le32_to_cpu(io_rsp->OutputCount);
1617                 if (qi.input_buffer_length > 0 &&
1618                     le32_to_cpu(io_rsp->OutputOffset) + qi.input_buffer_length
1619                     > rsp_iov[1].iov_len)
1620                         goto e_fault;
1621
1622                 if (copy_to_user(&pqi->input_buffer_length,
1623                                  &qi.input_buffer_length,
1624                                  sizeof(qi.input_buffer_length)))
1625                         goto e_fault;
1626
1627                 if (copy_to_user((void __user *)pqi + sizeof(struct smb_query_info),
1628                                  (const void *)io_rsp + le32_to_cpu(io_rsp->OutputOffset),
1629                                  qi.input_buffer_length))
1630                         goto e_fault;
1631         } else {
1632                 pqi = (struct smb_query_info __user *)arg;
1633                 qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
1634                 if (le32_to_cpu(qi_rsp->OutputBufferLength) < qi.input_buffer_length)
1635                         qi.input_buffer_length = le32_to_cpu(qi_rsp->OutputBufferLength);
1636                 if (copy_to_user(&pqi->input_buffer_length,
1637                                  &qi.input_buffer_length,
1638                                  sizeof(qi.input_buffer_length)))
1639                         goto e_fault;
1640
1641                 if (copy_to_user(pqi + 1, qi_rsp->Buffer,
1642                                  qi.input_buffer_length))
1643                         goto e_fault;
1644         }
1645
1646  iqinf_exit:
1647         kfree(buffer);
1648         SMB2_open_free(&rqst[0]);
1649         if (qi.flags & PASSTHRU_FSCTL)
1650                 SMB2_ioctl_free(&rqst[1]);
1651         else
1652                 SMB2_query_info_free(&rqst[1]);
1653
1654         SMB2_close_free(&rqst[2]);
1655         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1656         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1657         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1658         return rc;
1659
1660 e_fault:
1661         rc = -EFAULT;
1662         goto iqinf_exit;
1663 }
1664
1665 static ssize_t
1666 smb2_copychunk_range(const unsigned int xid,
1667                         struct cifsFileInfo *srcfile,
1668                         struct cifsFileInfo *trgtfile, u64 src_off,
1669                         u64 len, u64 dest_off)
1670 {
1671         int rc;
1672         unsigned int ret_data_len;
1673         struct copychunk_ioctl *pcchunk;
1674         struct copychunk_ioctl_rsp *retbuf = NULL;
1675         struct cifs_tcon *tcon;
1676         int chunks_copied = 0;
1677         bool chunk_sizes_updated = false;
1678         ssize_t bytes_written, total_bytes_written = 0;
1679
1680         pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
1681
1682         if (pcchunk == NULL)
1683                 return -ENOMEM;
1684
1685         cifs_dbg(FYI, "%s: about to call request res key\n", __func__);
1686         /* Request a key from the server to identify the source of the copy */
1687         rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
1688                                 srcfile->fid.persistent_fid,
1689                                 srcfile->fid.volatile_fid, pcchunk);
1690
1691         /* Note: request_res_key sets res_key null only if rc !=0 */
1692         if (rc)
1693                 goto cchunk_out;
1694
1695         /* For now array only one chunk long, will make more flexible later */
1696         pcchunk->ChunkCount = cpu_to_le32(1);
1697         pcchunk->Reserved = 0;
1698         pcchunk->Reserved2 = 0;
1699
1700         tcon = tlink_tcon(trgtfile->tlink);
1701
1702         while (len > 0) {
1703                 pcchunk->SourceOffset = cpu_to_le64(src_off);
1704                 pcchunk->TargetOffset = cpu_to_le64(dest_off);
1705                 pcchunk->Length =
1706                         cpu_to_le32(min_t(u32, len, tcon->max_bytes_chunk));
1707
1708                 /* Request server copy to target from src identified by key */
1709                 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1710                         trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
1711                         true /* is_fsctl */, (char *)pcchunk,
1712                         sizeof(struct copychunk_ioctl), CIFSMaxBufSize,
1713                         (char **)&retbuf, &ret_data_len);
1714                 if (rc == 0) {
1715                         if (ret_data_len !=
1716                                         sizeof(struct copychunk_ioctl_rsp)) {
1717                                 cifs_tcon_dbg(VFS, "invalid cchunk response size\n");
1718                                 rc = -EIO;
1719                                 goto cchunk_out;
1720                         }
1721                         if (retbuf->TotalBytesWritten == 0) {
1722                                 cifs_dbg(FYI, "no bytes copied\n");
1723                                 rc = -EIO;
1724                                 goto cchunk_out;
1725                         }
1726                         /*
1727                          * Check if server claimed to write more than we asked
1728                          */
1729                         if (le32_to_cpu(retbuf->TotalBytesWritten) >
1730                             le32_to_cpu(pcchunk->Length)) {
1731                                 cifs_tcon_dbg(VFS, "invalid copy chunk response\n");
1732                                 rc = -EIO;
1733                                 goto cchunk_out;
1734                         }
1735                         if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
1736                                 cifs_tcon_dbg(VFS, "invalid num chunks written\n");
1737                                 rc = -EIO;
1738                                 goto cchunk_out;
1739                         }
1740                         chunks_copied++;
1741
1742                         bytes_written = le32_to_cpu(retbuf->TotalBytesWritten);
1743                         src_off += bytes_written;
1744                         dest_off += bytes_written;
1745                         len -= bytes_written;
1746                         total_bytes_written += bytes_written;
1747
1748                         cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n",
1749                                 le32_to_cpu(retbuf->ChunksWritten),
1750                                 le32_to_cpu(retbuf->ChunkBytesWritten),
1751                                 bytes_written);
1752                 } else if (rc == -EINVAL) {
1753                         if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
1754                                 goto cchunk_out;
1755
1756                         cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
1757                                 le32_to_cpu(retbuf->ChunksWritten),
1758                                 le32_to_cpu(retbuf->ChunkBytesWritten),
1759                                 le32_to_cpu(retbuf->TotalBytesWritten));
1760
1761                         /*
1762                          * Check if this is the first request using these sizes,
1763                          * (ie check if copy succeed once with original sizes
1764                          * and check if the server gave us different sizes after
1765                          * we already updated max sizes on previous request).
1766                          * if not then why is the server returning an error now
1767                          */
1768                         if ((chunks_copied != 0) || chunk_sizes_updated)
1769                                 goto cchunk_out;
1770
1771                         /* Check that server is not asking us to grow size */
1772                         if (le32_to_cpu(retbuf->ChunkBytesWritten) <
1773                                         tcon->max_bytes_chunk)
1774                                 tcon->max_bytes_chunk =
1775                                         le32_to_cpu(retbuf->ChunkBytesWritten);
1776                         else
1777                                 goto cchunk_out; /* server gave us bogus size */
1778
1779                         /* No need to change MaxChunks since already set to 1 */
1780                         chunk_sizes_updated = true;
1781                 } else
1782                         goto cchunk_out;
1783         }
1784
1785 cchunk_out:
1786         kfree(pcchunk);
1787         kfree(retbuf);
1788         if (rc)
1789                 return rc;
1790         else
1791                 return total_bytes_written;
1792 }
1793
1794 static int
1795 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
1796                 struct cifs_fid *fid)
1797 {
1798         return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1799 }
1800
1801 static unsigned int
1802 smb2_read_data_offset(char *buf)
1803 {
1804         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1805
1806         return rsp->DataOffset;
1807 }
1808
1809 static unsigned int
1810 smb2_read_data_length(char *buf, bool in_remaining)
1811 {
1812         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1813
1814         if (in_remaining)
1815                 return le32_to_cpu(rsp->DataRemaining);
1816
1817         return le32_to_cpu(rsp->DataLength);
1818 }
1819
1820
1821 static int
1822 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,
1823                struct cifs_io_parms *parms, unsigned int *bytes_read,
1824                char **buf, int *buf_type)
1825 {
1826         parms->persistent_fid = pfid->persistent_fid;
1827         parms->volatile_fid = pfid->volatile_fid;
1828         return SMB2_read(xid, parms, bytes_read, buf, buf_type);
1829 }
1830
1831 static int
1832 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,
1833                 struct cifs_io_parms *parms, unsigned int *written,
1834                 struct kvec *iov, unsigned long nr_segs)
1835 {
1836
1837         parms->persistent_fid = pfid->persistent_fid;
1838         parms->volatile_fid = pfid->volatile_fid;
1839         return SMB2_write(xid, parms, written, iov, nr_segs);
1840 }
1841
1842 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
1843 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
1844                 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
1845 {
1846         struct cifsInodeInfo *cifsi;
1847         int rc;
1848
1849         cifsi = CIFS_I(inode);
1850
1851         /* if file already sparse don't bother setting sparse again */
1852         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
1853                 return true; /* already sparse */
1854
1855         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
1856                 return true; /* already not sparse */
1857
1858         /*
1859          * Can't check for sparse support on share the usual way via the
1860          * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
1861          * since Samba server doesn't set the flag on the share, yet
1862          * supports the set sparse FSCTL and returns sparse correctly
1863          * in the file attributes. If we fail setting sparse though we
1864          * mark that server does not support sparse files for this share
1865          * to avoid repeatedly sending the unsupported fsctl to server
1866          * if the file is repeatedly extended.
1867          */
1868         if (tcon->broken_sparse_sup)
1869                 return false;
1870
1871         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1872                         cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
1873                         true /* is_fctl */,
1874                         &setsparse, 1, CIFSMaxBufSize, NULL, NULL);
1875         if (rc) {
1876                 tcon->broken_sparse_sup = true;
1877                 cifs_dbg(FYI, "set sparse rc = %d\n", rc);
1878                 return false;
1879         }
1880
1881         if (setsparse)
1882                 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
1883         else
1884                 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
1885
1886         return true;
1887 }
1888
1889 static int
1890 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
1891                    struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
1892 {
1893         __le64 eof = cpu_to_le64(size);
1894         struct inode *inode;
1895
1896         /*
1897          * If extending file more than one page make sparse. Many Linux fs
1898          * make files sparse by default when extending via ftruncate
1899          */
1900         inode = d_inode(cfile->dentry);
1901
1902         if (!set_alloc && (size > inode->i_size + 8192)) {
1903                 __u8 set_sparse = 1;
1904
1905                 /* whether set sparse succeeds or not, extend the file */
1906                 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
1907         }
1908
1909         return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
1910                             cfile->fid.volatile_fid, cfile->pid, &eof);
1911 }
1912
1913 static int
1914 smb2_duplicate_extents(const unsigned int xid,
1915                         struct cifsFileInfo *srcfile,
1916                         struct cifsFileInfo *trgtfile, u64 src_off,
1917                         u64 len, u64 dest_off)
1918 {
1919         int rc;
1920         unsigned int ret_data_len;
1921         struct duplicate_extents_to_file dup_ext_buf;
1922         struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink);
1923
1924         /* server fileays advertise duplicate extent support with this flag */
1925         if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) &
1926              FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0)
1927                 return -EOPNOTSUPP;
1928
1929         dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid;
1930         dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid;
1931         dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off);
1932         dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off);
1933         dup_ext_buf.ByteCount = cpu_to_le64(len);
1934         cifs_dbg(FYI, "Duplicate extents: src off %lld dst off %lld len %lld\n",
1935                 src_off, dest_off, len);
1936
1937         rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false);
1938         if (rc)
1939                 goto duplicate_extents_out;
1940
1941         rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1942                         trgtfile->fid.volatile_fid,
1943                         FSCTL_DUPLICATE_EXTENTS_TO_FILE,
1944                         true /* is_fsctl */,
1945                         (char *)&dup_ext_buf,
1946                         sizeof(struct duplicate_extents_to_file),
1947                         CIFSMaxBufSize, NULL,
1948                         &ret_data_len);
1949
1950         if (ret_data_len > 0)
1951                 cifs_dbg(FYI, "Non-zero response length in duplicate extents\n");
1952
1953 duplicate_extents_out:
1954         return rc;
1955 }
1956
1957 static int
1958 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
1959                    struct cifsFileInfo *cfile)
1960 {
1961         return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
1962                             cfile->fid.volatile_fid);
1963 }
1964
1965 static int
1966 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
1967                    struct cifsFileInfo *cfile)
1968 {
1969         struct fsctl_set_integrity_information_req integr_info;
1970         unsigned int ret_data_len;
1971
1972         integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED);
1973         integr_info.Flags = 0;
1974         integr_info.Reserved = 0;
1975
1976         return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1977                         cfile->fid.volatile_fid,
1978                         FSCTL_SET_INTEGRITY_INFORMATION,
1979                         true /* is_fsctl */,
1980                         (char *)&integr_info,
1981                         sizeof(struct fsctl_set_integrity_information_req),
1982                         CIFSMaxBufSize, NULL,
1983                         &ret_data_len);
1984
1985 }
1986
1987 /* GMT Token is @GMT-YYYY.MM.DD-HH.MM.SS Unicode which is 48 bytes + null */
1988 #define GMT_TOKEN_SIZE 50
1989
1990 #define MIN_SNAPSHOT_ARRAY_SIZE 16 /* See MS-SMB2 section 3.3.5.15.1 */
1991
1992 /*
1993  * Input buffer contains (empty) struct smb_snapshot array with size filled in
1994  * For output see struct SRV_SNAPSHOT_ARRAY in MS-SMB2 section 2.2.32.2
1995  */
1996 static int
1997 smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon,
1998                    struct cifsFileInfo *cfile, void __user *ioc_buf)
1999 {
2000         char *retbuf = NULL;
2001         unsigned int ret_data_len = 0;
2002         int rc;
2003         u32 max_response_size;
2004         struct smb_snapshot_array snapshot_in;
2005
2006         /*
2007          * On the first query to enumerate the list of snapshots available
2008          * for this volume the buffer begins with 0 (number of snapshots
2009          * which can be returned is zero since at that point we do not know
2010          * how big the buffer needs to be). On the second query,
2011          * it (ret_data_len) is set to number of snapshots so we can
2012          * know to set the maximum response size larger (see below).
2013          */
2014         if (get_user(ret_data_len, (unsigned int __user *)ioc_buf))
2015                 return -EFAULT;
2016
2017         /*
2018          * Note that for snapshot queries that servers like Azure expect that
2019          * the first query be minimal size (and just used to get the number/size
2020          * of previous versions) so response size must be specified as EXACTLY
2021          * sizeof(struct snapshot_array) which is 16 when rounded up to multiple
2022          * of eight bytes.
2023          */
2024         if (ret_data_len == 0)
2025                 max_response_size = MIN_SNAPSHOT_ARRAY_SIZE;
2026         else
2027                 max_response_size = CIFSMaxBufSize;
2028
2029         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2030                         cfile->fid.volatile_fid,
2031                         FSCTL_SRV_ENUMERATE_SNAPSHOTS,
2032                         true /* is_fsctl */,
2033                         NULL, 0 /* no input data */, max_response_size,
2034                         (char **)&retbuf,
2035                         &ret_data_len);
2036         cifs_dbg(FYI, "enum snaphots ioctl returned %d and ret buflen is %d\n",
2037                         rc, ret_data_len);
2038         if (rc)
2039                 return rc;
2040
2041         if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) {
2042                 /* Fixup buffer */
2043                 if (copy_from_user(&snapshot_in, ioc_buf,
2044                     sizeof(struct smb_snapshot_array))) {
2045                         rc = -EFAULT;
2046                         kfree(retbuf);
2047                         return rc;
2048                 }
2049
2050                 /*
2051                  * Check for min size, ie not large enough to fit even one GMT
2052                  * token (snapshot).  On the first ioctl some users may pass in
2053                  * smaller size (or zero) to simply get the size of the array
2054                  * so the user space caller can allocate sufficient memory
2055                  * and retry the ioctl again with larger array size sufficient
2056                  * to hold all of the snapshot GMT tokens on the second try.
2057                  */
2058                 if (snapshot_in.snapshot_array_size < GMT_TOKEN_SIZE)
2059                         ret_data_len = sizeof(struct smb_snapshot_array);
2060
2061                 /*
2062                  * We return struct SRV_SNAPSHOT_ARRAY, followed by
2063                  * the snapshot array (of 50 byte GMT tokens) each
2064                  * representing an available previous version of the data
2065                  */
2066                 if (ret_data_len > (snapshot_in.snapshot_array_size +
2067                                         sizeof(struct smb_snapshot_array)))
2068                         ret_data_len = snapshot_in.snapshot_array_size +
2069                                         sizeof(struct smb_snapshot_array);
2070
2071                 if (copy_to_user(ioc_buf, retbuf, ret_data_len))
2072                         rc = -EFAULT;
2073         }
2074
2075         kfree(retbuf);
2076         return rc;
2077 }
2078
2079
2080
2081 static int
2082 smb3_notify(const unsigned int xid, struct file *pfile,
2083             void __user *ioc_buf)
2084 {
2085         struct smb3_notify notify;
2086         struct dentry *dentry = pfile->f_path.dentry;
2087         struct inode *inode = file_inode(pfile);
2088         struct cifs_sb_info *cifs_sb;
2089         struct cifs_open_parms oparms;
2090         struct cifs_fid fid;
2091         struct cifs_tcon *tcon;
2092         unsigned char *path = NULL;
2093         __le16 *utf16_path = NULL;
2094         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2095         int rc = 0;
2096
2097         path = build_path_from_dentry(dentry);
2098         if (path == NULL)
2099                 return -ENOMEM;
2100
2101         cifs_sb = CIFS_SB(inode->i_sb);
2102
2103         utf16_path = cifs_convert_path_to_utf16(path + 1, cifs_sb);
2104         if (utf16_path == NULL) {
2105                 rc = -ENOMEM;
2106                 goto notify_exit;
2107         }
2108
2109         if (copy_from_user(&notify, ioc_buf, sizeof(struct smb3_notify))) {
2110                 rc = -EFAULT;
2111                 goto notify_exit;
2112         }
2113
2114         tcon = cifs_sb_master_tcon(cifs_sb);
2115         oparms.tcon = tcon;
2116         oparms.desired_access = FILE_READ_ATTRIBUTES;
2117         oparms.disposition = FILE_OPEN;
2118         oparms.create_options = cifs_create_options(cifs_sb, 0);
2119         oparms.fid = &fid;
2120         oparms.reconnect = false;
2121
2122         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,
2123                        NULL);
2124         if (rc)
2125                 goto notify_exit;
2126
2127         rc = SMB2_change_notify(xid, tcon, fid.persistent_fid, fid.volatile_fid,
2128                                 notify.watch_tree, notify.completion_filter);
2129
2130         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2131
2132         cifs_dbg(FYI, "change notify for path %s rc %d\n", path, rc);
2133
2134 notify_exit:
2135         kfree(path);
2136         kfree(utf16_path);
2137         return rc;
2138 }
2139
2140 static int
2141 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
2142                      const char *path, struct cifs_sb_info *cifs_sb,
2143                      struct cifs_fid *fid, __u16 search_flags,
2144                      struct cifs_search_info *srch_inf)
2145 {
2146         __le16 *utf16_path;
2147         struct smb_rqst rqst[2];
2148         struct kvec rsp_iov[2];
2149         int resp_buftype[2];
2150         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
2151         struct kvec qd_iov[SMB2_QUERY_DIRECTORY_IOV_SIZE];
2152         int rc, flags = 0;
2153         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2154         struct cifs_open_parms oparms;
2155         struct smb2_query_directory_rsp *qd_rsp = NULL;
2156         struct smb2_create_rsp *op_rsp = NULL;
2157
2158         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2159         if (!utf16_path)
2160                 return -ENOMEM;
2161
2162         if (smb3_encryption_required(tcon))
2163                 flags |= CIFS_TRANSFORM_REQ;
2164
2165         memset(rqst, 0, sizeof(rqst));
2166         resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER;
2167         memset(rsp_iov, 0, sizeof(rsp_iov));
2168
2169         /* Open */
2170         memset(&open_iov, 0, sizeof(open_iov));
2171         rqst[0].rq_iov = open_iov;
2172         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2173
2174         oparms.tcon = tcon;
2175         oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
2176         oparms.disposition = FILE_OPEN;
2177         oparms.create_options = cifs_create_options(cifs_sb, 0);
2178         oparms.fid = fid;
2179         oparms.reconnect = false;
2180
2181         rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, utf16_path);
2182         if (rc)
2183                 goto qdf_free;
2184         smb2_set_next_command(tcon, &rqst[0]);
2185
2186         /* Query directory */
2187         srch_inf->entries_in_buffer = 0;
2188         srch_inf->index_of_last_entry = 2;
2189
2190         memset(&qd_iov, 0, sizeof(qd_iov));
2191         rqst[1].rq_iov = qd_iov;
2192         rqst[1].rq_nvec = SMB2_QUERY_DIRECTORY_IOV_SIZE;
2193
2194         rc = SMB2_query_directory_init(xid, tcon, &rqst[1],
2195                                        COMPOUND_FID, COMPOUND_FID,
2196                                        0, srch_inf->info_level);
2197         if (rc)
2198                 goto qdf_free;
2199
2200         smb2_set_related(&rqst[1]);
2201
2202         rc = compound_send_recv(xid, tcon->ses, flags, 2, rqst,
2203                                 resp_buftype, rsp_iov);
2204
2205         /* If the open failed there is nothing to do */
2206         op_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base;
2207         if (op_rsp == NULL || op_rsp->sync_hdr.Status != STATUS_SUCCESS) {
2208                 cifs_dbg(FYI, "query_dir_first: open failed rc=%d\n", rc);
2209                 goto qdf_free;
2210         }
2211         fid->persistent_fid = op_rsp->PersistentFileId;
2212         fid->volatile_fid = op_rsp->VolatileFileId;
2213
2214         /* Anything else than ENODATA means a genuine error */
2215         if (rc && rc != -ENODATA) {
2216                 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
2217                 cifs_dbg(FYI, "query_dir_first: query directory failed rc=%d\n", rc);
2218                 trace_smb3_query_dir_err(xid, fid->persistent_fid,
2219                                          tcon->tid, tcon->ses->Suid, 0, 0, rc);
2220                 goto qdf_free;
2221         }
2222
2223         atomic_inc(&tcon->num_remote_opens);
2224
2225         qd_rsp = (struct smb2_query_directory_rsp *)rsp_iov[1].iov_base;
2226         if (qd_rsp->sync_hdr.Status == STATUS_NO_MORE_FILES) {
2227                 trace_smb3_query_dir_done(xid, fid->persistent_fid,
2228                                           tcon->tid, tcon->ses->Suid, 0, 0);
2229                 srch_inf->endOfSearch = true;
2230                 rc = 0;
2231                 goto qdf_free;
2232         }
2233
2234         rc = smb2_parse_query_directory(tcon, &rsp_iov[1], resp_buftype[1],
2235                                         srch_inf);
2236         if (rc) {
2237                 trace_smb3_query_dir_err(xid, fid->persistent_fid, tcon->tid,
2238                         tcon->ses->Suid, 0, 0, rc);
2239                 goto qdf_free;
2240         }
2241         resp_buftype[1] = CIFS_NO_BUFFER;
2242
2243         trace_smb3_query_dir_done(xid, fid->persistent_fid, tcon->tid,
2244                         tcon->ses->Suid, 0, srch_inf->entries_in_buffer);
2245
2246  qdf_free:
2247         kfree(utf16_path);
2248         SMB2_open_free(&rqst[0]);
2249         SMB2_query_directory_free(&rqst[1]);
2250         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2251         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2252         return rc;
2253 }
2254
2255 static int
2256 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
2257                     struct cifs_fid *fid, __u16 search_flags,
2258                     struct cifs_search_info *srch_inf)
2259 {
2260         return SMB2_query_directory(xid, tcon, fid->persistent_fid,
2261                                     fid->volatile_fid, 0, srch_inf);
2262 }
2263
2264 static int
2265 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
2266                struct cifs_fid *fid)
2267 {
2268         return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
2269 }
2270
2271 /*
2272  * If we negotiate SMB2 protocol and get STATUS_PENDING - update
2273  * the number of credits and return true. Otherwise - return false.
2274  */
2275 static bool
2276 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server)
2277 {
2278         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
2279
2280         if (shdr->Status != STATUS_PENDING)
2281                 return false;
2282
2283         if (shdr->CreditRequest) {
2284                 spin_lock(&server->req_lock);
2285                 server->credits += le16_to_cpu(shdr->CreditRequest);
2286                 spin_unlock(&server->req_lock);
2287                 wake_up(&server->request_q);
2288         }
2289
2290         return true;
2291 }
2292
2293 static bool
2294 smb2_is_session_expired(char *buf)
2295 {
2296         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
2297
2298         if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED &&
2299             shdr->Status != STATUS_USER_SESSION_DELETED)
2300                 return false;
2301
2302         trace_smb3_ses_expired(shdr->TreeId, shdr->SessionId,
2303                                le16_to_cpu(shdr->Command),
2304                                le64_to_cpu(shdr->MessageId));
2305         cifs_dbg(FYI, "Session expired or deleted\n");
2306
2307         return true;
2308 }
2309
2310 static int
2311 smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
2312                      struct cifsInodeInfo *cinode)
2313 {
2314         if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
2315                 return SMB2_lease_break(0, tcon, cinode->lease_key,
2316                                         smb2_get_lease_state(cinode));
2317
2318         return SMB2_oplock_break(0, tcon, fid->persistent_fid,
2319                                  fid->volatile_fid,
2320                                  CIFS_CACHE_READ(cinode) ? 1 : 0);
2321 }
2322
2323 void
2324 smb2_set_related(struct smb_rqst *rqst)
2325 {
2326         struct smb2_sync_hdr *shdr;
2327
2328         shdr = (struct smb2_sync_hdr *)(rqst->rq_iov[0].iov_base);
2329         if (shdr == NULL) {
2330                 cifs_dbg(FYI, "shdr NULL in smb2_set_related\n");
2331                 return;
2332         }
2333         shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
2334 }
2335
2336 char smb2_padding[7] = {0, 0, 0, 0, 0, 0, 0};
2337
2338 void
2339 smb2_set_next_command(struct cifs_tcon *tcon, struct smb_rqst *rqst)
2340 {
2341         struct smb2_sync_hdr *shdr;
2342         struct cifs_ses *ses = tcon->ses;
2343         struct TCP_Server_Info *server = ses->server;
2344         unsigned long len = smb_rqst_len(server, rqst);
2345         int i, num_padding;
2346
2347         shdr = (struct smb2_sync_hdr *)(rqst->rq_iov[0].iov_base);
2348         if (shdr == NULL) {
2349                 cifs_dbg(FYI, "shdr NULL in smb2_set_next_command\n");
2350                 return;
2351         }
2352
2353         /* SMB headers in a compound are 8 byte aligned. */
2354
2355         /* No padding needed */
2356         if (!(len & 7))
2357                 goto finished;
2358
2359         num_padding = 8 - (len & 7);
2360         if (!smb3_encryption_required(tcon)) {
2361                 /*
2362                  * If we do not have encryption then we can just add an extra
2363                  * iov for the padding.
2364                  */
2365                 rqst->rq_iov[rqst->rq_nvec].iov_base = smb2_padding;
2366                 rqst->rq_iov[rqst->rq_nvec].iov_len = num_padding;
2367                 rqst->rq_nvec++;
2368                 len += num_padding;
2369         } else {
2370                 /*
2371                  * We can not add a small padding iov for the encryption case
2372                  * because the encryption framework can not handle the padding
2373                  * iovs.
2374                  * We have to flatten this into a single buffer and add
2375                  * the padding to it.
2376                  */
2377                 for (i = 1; i < rqst->rq_nvec; i++) {
2378                         memcpy(rqst->rq_iov[0].iov_base +
2379                                rqst->rq_iov[0].iov_len,
2380                                rqst->rq_iov[i].iov_base,
2381                                rqst->rq_iov[i].iov_len);
2382                         rqst->rq_iov[0].iov_len += rqst->rq_iov[i].iov_len;
2383                 }
2384                 memset(rqst->rq_iov[0].iov_base + rqst->rq_iov[0].iov_len,
2385                        0, num_padding);
2386                 rqst->rq_iov[0].iov_len += num_padding;
2387                 len += num_padding;
2388                 rqst->rq_nvec = 1;
2389         }
2390
2391  finished:
2392         shdr->NextCommand = cpu_to_le32(len);
2393 }
2394
2395 /*
2396  * Passes the query info response back to the caller on success.
2397  * Caller need to free this with free_rsp_buf().
2398  */
2399 int
2400 smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon,
2401                          __le16 *utf16_path, u32 desired_access,
2402                          u32 class, u32 type, u32 output_len,
2403                          struct kvec *rsp, int *buftype,
2404                          struct cifs_sb_info *cifs_sb)
2405 {
2406         struct cifs_ses *ses = tcon->ses;
2407         int flags = 0;
2408         struct smb_rqst rqst[3];
2409         int resp_buftype[3];
2410         struct kvec rsp_iov[3];
2411         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
2412         struct kvec qi_iov[1];
2413         struct kvec close_iov[1];
2414         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2415         struct cifs_open_parms oparms;
2416         struct cifs_fid fid;
2417         int rc;
2418
2419         if (smb3_encryption_required(tcon))
2420                 flags |= CIFS_TRANSFORM_REQ;
2421
2422         memset(rqst, 0, sizeof(rqst));
2423         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
2424         memset(rsp_iov, 0, sizeof(rsp_iov));
2425
2426         memset(&open_iov, 0, sizeof(open_iov));
2427         rqst[0].rq_iov = open_iov;
2428         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2429
2430         oparms.tcon = tcon;
2431         oparms.desired_access = desired_access;
2432         oparms.disposition = FILE_OPEN;
2433         oparms.create_options = cifs_create_options(cifs_sb, 0);
2434         oparms.fid = &fid;
2435         oparms.reconnect = false;
2436
2437         rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, utf16_path);
2438         if (rc)
2439                 goto qic_exit;
2440         smb2_set_next_command(tcon, &rqst[0]);
2441
2442         memset(&qi_iov, 0, sizeof(qi_iov));
2443         rqst[1].rq_iov = qi_iov;
2444         rqst[1].rq_nvec = 1;
2445
2446         rc = SMB2_query_info_init(tcon, &rqst[1], COMPOUND_FID, COMPOUND_FID,
2447                                   class, type, 0,
2448                                   output_len, 0,
2449                                   NULL);
2450         if (rc)
2451                 goto qic_exit;
2452         smb2_set_next_command(tcon, &rqst[1]);
2453         smb2_set_related(&rqst[1]);
2454
2455         memset(&close_iov, 0, sizeof(close_iov));
2456         rqst[2].rq_iov = close_iov;
2457         rqst[2].rq_nvec = 1;
2458
2459         rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
2460         if (rc)
2461                 goto qic_exit;
2462         smb2_set_related(&rqst[2]);
2463
2464         rc = compound_send_recv(xid, ses, flags, 3, rqst,
2465                                 resp_buftype, rsp_iov);
2466         if (rc) {
2467                 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2468                 if (rc == -EREMCHG) {
2469                         tcon->need_reconnect = true;
2470                         printk_once(KERN_WARNING "server share %s deleted\n",
2471                                     tcon->treeName);
2472                 }
2473                 goto qic_exit;
2474         }
2475         *rsp = rsp_iov[1];
2476         *buftype = resp_buftype[1];
2477
2478  qic_exit:
2479         SMB2_open_free(&rqst[0]);
2480         SMB2_query_info_free(&rqst[1]);
2481         SMB2_close_free(&rqst[2]);
2482         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2483         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
2484         return rc;
2485 }
2486
2487 static int
2488 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2489              struct cifs_sb_info *cifs_sb, struct kstatfs *buf)
2490 {
2491         struct smb2_query_info_rsp *rsp;
2492         struct smb2_fs_full_size_info *info = NULL;
2493         __le16 utf16_path = 0; /* Null - open root of share */
2494         struct kvec rsp_iov = {NULL, 0};
2495         int buftype = CIFS_NO_BUFFER;
2496         int rc;
2497
2498
2499         rc = smb2_query_info_compound(xid, tcon, &utf16_path,
2500                                       FILE_READ_ATTRIBUTES,
2501                                       FS_FULL_SIZE_INFORMATION,
2502                                       SMB2_O_INFO_FILESYSTEM,
2503                                       sizeof(struct smb2_fs_full_size_info),
2504                                       &rsp_iov, &buftype, cifs_sb);
2505         if (rc)
2506                 goto qfs_exit;
2507
2508         rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
2509         buf->f_type = SMB2_MAGIC_NUMBER;
2510         info = (struct smb2_fs_full_size_info *)(
2511                 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
2512         rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
2513                                le32_to_cpu(rsp->OutputBufferLength),
2514                                &rsp_iov,
2515                                sizeof(struct smb2_fs_full_size_info));
2516         if (!rc)
2517                 smb2_copy_fs_info_to_kstatfs(info, buf);
2518
2519 qfs_exit:
2520         free_rsp_buf(buftype, rsp_iov.iov_base);
2521         return rc;
2522 }
2523
2524 static int
2525 smb311_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2526                struct cifs_sb_info *cifs_sb, struct kstatfs *buf)
2527 {
2528         int rc;
2529         __le16 srch_path = 0; /* Null - open root of share */
2530         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2531         struct cifs_open_parms oparms;
2532         struct cifs_fid fid;
2533
2534         if (!tcon->posix_extensions)
2535                 return smb2_queryfs(xid, tcon, cifs_sb, buf);
2536
2537         oparms.tcon = tcon;
2538         oparms.desired_access = FILE_READ_ATTRIBUTES;
2539         oparms.disposition = FILE_OPEN;
2540         oparms.create_options = cifs_create_options(cifs_sb, 0);
2541         oparms.fid = &fid;
2542         oparms.reconnect = false;
2543
2544         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
2545                        NULL, NULL);
2546         if (rc)
2547                 return rc;
2548
2549         rc = SMB311_posix_qfs_info(xid, tcon, fid.persistent_fid,
2550                                    fid.volatile_fid, buf);
2551         buf->f_type = SMB2_MAGIC_NUMBER;
2552         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2553         return rc;
2554 }
2555
2556 static bool
2557 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
2558 {
2559         return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
2560                ob1->fid.volatile_fid == ob2->fid.volatile_fid;
2561 }
2562
2563 static int
2564 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
2565                __u64 length, __u32 type, int lock, int unlock, bool wait)
2566 {
2567         if (unlock && !lock)
2568                 type = SMB2_LOCKFLAG_UNLOCK;
2569         return SMB2_lock(xid, tlink_tcon(cfile->tlink),
2570                          cfile->fid.persistent_fid, cfile->fid.volatile_fid,
2571                          current->tgid, length, offset, type, wait);
2572 }
2573
2574 static void
2575 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
2576 {
2577         memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
2578 }
2579
2580 static void
2581 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
2582 {
2583         memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
2584 }
2585
2586 static void
2587 smb2_new_lease_key(struct cifs_fid *fid)
2588 {
2589         generate_random_uuid(fid->lease_key);
2590 }
2591
2592 static int
2593 smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,
2594                    const char *search_name,
2595                    struct dfs_info3_param **target_nodes,
2596                    unsigned int *num_of_nodes,
2597                    const struct nls_table *nls_codepage, int remap)
2598 {
2599         int rc;
2600         __le16 *utf16_path = NULL;
2601         int utf16_path_len = 0;
2602         struct cifs_tcon *tcon;
2603         struct fsctl_get_dfs_referral_req *dfs_req = NULL;
2604         struct get_dfs_referral_rsp *dfs_rsp = NULL;
2605         u32 dfs_req_size = 0, dfs_rsp_size = 0;
2606
2607         cifs_dbg(FYI, "%s: path: %s\n", __func__, search_name);
2608
2609         /*
2610          * Try to use the IPC tcon, otherwise just use any
2611          */
2612         tcon = ses->tcon_ipc;
2613         if (tcon == NULL) {
2614                 spin_lock(&cifs_tcp_ses_lock);
2615                 tcon = list_first_entry_or_null(&ses->tcon_list,
2616                                                 struct cifs_tcon,
2617                                                 tcon_list);
2618                 if (tcon)
2619                         tcon->tc_count++;
2620                 spin_unlock(&cifs_tcp_ses_lock);
2621         }
2622
2623         if (tcon == NULL) {
2624                 cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n",
2625                          ses);
2626                 rc = -ENOTCONN;
2627                 goto out;
2628         }
2629
2630         utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX,
2631                                            &utf16_path_len,
2632                                            nls_codepage, remap);
2633         if (!utf16_path) {
2634                 rc = -ENOMEM;
2635                 goto out;
2636         }
2637
2638         dfs_req_size = sizeof(*dfs_req) + utf16_path_len;
2639         dfs_req = kzalloc(dfs_req_size, GFP_KERNEL);
2640         if (!dfs_req) {
2641                 rc = -ENOMEM;
2642                 goto out;
2643         }
2644
2645         /* Highest DFS referral version understood */
2646         dfs_req->MaxReferralLevel = DFS_VERSION;
2647
2648         /* Path to resolve in an UTF-16 null-terminated string */
2649         memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len);
2650
2651         do {
2652                 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
2653                                 FSCTL_DFS_GET_REFERRALS,
2654                                 true /* is_fsctl */,
2655                                 (char *)dfs_req, dfs_req_size, CIFSMaxBufSize,
2656                                 (char **)&dfs_rsp, &dfs_rsp_size);
2657         } while (rc == -EAGAIN);
2658
2659         if (rc) {
2660                 if ((rc != -ENOENT) && (rc != -EOPNOTSUPP))
2661                         cifs_tcon_dbg(VFS, "ioctl error in %s rc=%d\n", __func__, rc);
2662                 goto out;
2663         }
2664
2665         rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size,
2666                                  num_of_nodes, target_nodes,
2667                                  nls_codepage, remap, search_name,
2668                                  true /* is_unicode */);
2669         if (rc) {
2670                 cifs_tcon_dbg(VFS, "parse error in %s rc=%d\n", __func__, rc);
2671                 goto out;
2672         }
2673
2674  out:
2675         if (tcon && !tcon->ipc) {
2676                 /* ipc tcons are not refcounted */
2677                 spin_lock(&cifs_tcp_ses_lock);
2678                 tcon->tc_count--;
2679                 spin_unlock(&cifs_tcp_ses_lock);
2680         }
2681         kfree(utf16_path);
2682         kfree(dfs_req);
2683         kfree(dfs_rsp);
2684         return rc;
2685 }
2686
2687 static int
2688 parse_reparse_posix(struct reparse_posix_data *symlink_buf,
2689                       u32 plen, char **target_path,
2690                       struct cifs_sb_info *cifs_sb)
2691 {
2692         unsigned int len;
2693
2694         /* See MS-FSCC 2.1.2.6 for the 'NFS' style reparse tags */
2695         len = le16_to_cpu(symlink_buf->ReparseDataLength);
2696
2697         if (le64_to_cpu(symlink_buf->InodeType) != NFS_SPECFILE_LNK) {
2698                 cifs_dbg(VFS, "%lld not a supported symlink type\n",
2699                         le64_to_cpu(symlink_buf->InodeType));
2700                 return -EOPNOTSUPP;
2701         }
2702
2703         *target_path = cifs_strndup_from_utf16(
2704                                 symlink_buf->PathBuffer,
2705                                 len, true, cifs_sb->local_nls);
2706         if (!(*target_path))
2707                 return -ENOMEM;
2708
2709         convert_delimiter(*target_path, '/');
2710         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
2711
2712         return 0;
2713 }
2714
2715 static int
2716 parse_reparse_symlink(struct reparse_symlink_data_buffer *symlink_buf,
2717                       u32 plen, char **target_path,
2718                       struct cifs_sb_info *cifs_sb)
2719 {
2720         unsigned int sub_len;
2721         unsigned int sub_offset;
2722
2723         /* We handle Symbolic Link reparse tag here. See: MS-FSCC 2.1.2.4 */
2724
2725         sub_offset = le16_to_cpu(symlink_buf->SubstituteNameOffset);
2726         sub_len = le16_to_cpu(symlink_buf->SubstituteNameLength);
2727         if (sub_offset + 20 > plen ||
2728             sub_offset + sub_len + 20 > plen) {
2729                 cifs_dbg(VFS, "srv returned malformed symlink buffer\n");
2730                 return -EIO;
2731         }
2732
2733         *target_path = cifs_strndup_from_utf16(
2734                                 symlink_buf->PathBuffer + sub_offset,
2735                                 sub_len, true, cifs_sb->local_nls);
2736         if (!(*target_path))
2737                 return -ENOMEM;
2738
2739         convert_delimiter(*target_path, '/');
2740         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
2741
2742         return 0;
2743 }
2744
2745 static int
2746 parse_reparse_point(struct reparse_data_buffer *buf,
2747                     u32 plen, char **target_path,
2748                     struct cifs_sb_info *cifs_sb)
2749 {
2750         if (plen < sizeof(struct reparse_data_buffer)) {
2751                 cifs_dbg(VFS, "reparse buffer is too small. Must be "
2752                          "at least 8 bytes but was %d\n", plen);
2753                 return -EIO;
2754         }
2755
2756         if (plen < le16_to_cpu(buf->ReparseDataLength) +
2757             sizeof(struct reparse_data_buffer)) {
2758                 cifs_dbg(VFS, "srv returned invalid reparse buf "
2759                          "length: %d\n", plen);
2760                 return -EIO;
2761         }
2762
2763         /* See MS-FSCC 2.1.2 */
2764         switch (le32_to_cpu(buf->ReparseTag)) {
2765         case IO_REPARSE_TAG_NFS:
2766                 return parse_reparse_posix(
2767                         (struct reparse_posix_data *)buf,
2768                         plen, target_path, cifs_sb);
2769         case IO_REPARSE_TAG_SYMLINK:
2770                 return parse_reparse_symlink(
2771                         (struct reparse_symlink_data_buffer *)buf,
2772                         plen, target_path, cifs_sb);
2773         default:
2774                 cifs_dbg(VFS, "srv returned unknown symlink buffer "
2775                          "tag:0x%08x\n", le32_to_cpu(buf->ReparseTag));
2776                 return -EOPNOTSUPP;
2777         }
2778 }
2779
2780 #define SMB2_SYMLINK_STRUCT_SIZE \
2781         (sizeof(struct smb2_err_rsp) - 1 + sizeof(struct smb2_symlink_err_rsp))
2782
2783 static int
2784 smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
2785                    struct cifs_sb_info *cifs_sb, const char *full_path,
2786                    char **target_path, bool is_reparse_point)
2787 {
2788         int rc;
2789         __le16 *utf16_path = NULL;
2790         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2791         struct cifs_open_parms oparms;
2792         struct cifs_fid fid;
2793         struct kvec err_iov = {NULL, 0};
2794         struct smb2_err_rsp *err_buf = NULL;
2795         struct smb2_symlink_err_rsp *symlink;
2796         unsigned int sub_len;
2797         unsigned int sub_offset;
2798         unsigned int print_len;
2799         unsigned int print_offset;
2800         int flags = 0;
2801         struct smb_rqst rqst[3];
2802         int resp_buftype[3];
2803         struct kvec rsp_iov[3];
2804         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
2805         struct kvec io_iov[SMB2_IOCTL_IOV_SIZE];
2806         struct kvec close_iov[1];
2807         struct smb2_create_rsp *create_rsp;
2808         struct smb2_ioctl_rsp *ioctl_rsp;
2809         struct reparse_data_buffer *reparse_buf;
2810         int create_options = is_reparse_point ? OPEN_REPARSE_POINT : 0;
2811         u32 plen;
2812
2813         cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
2814
2815         *target_path = NULL;
2816
2817         if (smb3_encryption_required(tcon))
2818                 flags |= CIFS_TRANSFORM_REQ;
2819
2820         memset(rqst, 0, sizeof(rqst));
2821         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
2822         memset(rsp_iov, 0, sizeof(rsp_iov));
2823
2824         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
2825         if (!utf16_path)
2826                 return -ENOMEM;
2827
2828         /* Open */
2829         memset(&open_iov, 0, sizeof(open_iov));
2830         rqst[0].rq_iov = open_iov;
2831         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2832
2833         memset(&oparms, 0, sizeof(oparms));
2834         oparms.tcon = tcon;
2835         oparms.desired_access = FILE_READ_ATTRIBUTES;
2836         oparms.disposition = FILE_OPEN;
2837         oparms.create_options = cifs_create_options(cifs_sb, create_options);
2838         oparms.fid = &fid;
2839         oparms.reconnect = false;
2840
2841         rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, utf16_path);
2842         if (rc)
2843                 goto querty_exit;
2844         smb2_set_next_command(tcon, &rqst[0]);
2845
2846
2847         /* IOCTL */
2848         memset(&io_iov, 0, sizeof(io_iov));
2849         rqst[1].rq_iov = io_iov;
2850         rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
2851
2852         rc = SMB2_ioctl_init(tcon, &rqst[1], fid.persistent_fid,
2853                              fid.volatile_fid, FSCTL_GET_REPARSE_POINT,
2854                              true /* is_fctl */, NULL, 0,
2855                              CIFSMaxBufSize -
2856                              MAX_SMB2_CREATE_RESPONSE_SIZE -
2857                              MAX_SMB2_CLOSE_RESPONSE_SIZE);
2858         if (rc)
2859                 goto querty_exit;
2860
2861         smb2_set_next_command(tcon, &rqst[1]);
2862         smb2_set_related(&rqst[1]);
2863
2864
2865         /* Close */
2866         memset(&close_iov, 0, sizeof(close_iov));
2867         rqst[2].rq_iov = close_iov;
2868         rqst[2].rq_nvec = 1;
2869
2870         rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
2871         if (rc)
2872                 goto querty_exit;
2873
2874         smb2_set_related(&rqst[2]);
2875
2876         rc = compound_send_recv(xid, tcon->ses, flags, 3, rqst,
2877                                 resp_buftype, rsp_iov);
2878
2879         create_rsp = rsp_iov[0].iov_base;
2880         if (create_rsp && create_rsp->sync_hdr.Status)
2881                 err_iov = rsp_iov[0];
2882         ioctl_rsp = rsp_iov[1].iov_base;
2883
2884         /*
2885          * Open was successful and we got an ioctl response.
2886          */
2887         if ((rc == 0) && (is_reparse_point)) {
2888                 /* See MS-FSCC 2.3.23 */
2889
2890                 reparse_buf = (struct reparse_data_buffer *)
2891                         ((char *)ioctl_rsp +
2892                          le32_to_cpu(ioctl_rsp->OutputOffset));
2893                 plen = le32_to_cpu(ioctl_rsp->OutputCount);
2894
2895                 if (plen + le32_to_cpu(ioctl_rsp->OutputOffset) >
2896                     rsp_iov[1].iov_len) {
2897                         cifs_tcon_dbg(VFS, "srv returned invalid ioctl len: %d\n",
2898                                  plen);
2899                         rc = -EIO;
2900                         goto querty_exit;
2901                 }
2902
2903                 rc = parse_reparse_point(reparse_buf, plen, target_path,
2904                                          cifs_sb);
2905                 goto querty_exit;
2906         }
2907
2908         if (!rc || !err_iov.iov_base) {
2909                 rc = -ENOENT;
2910                 goto querty_exit;
2911         }
2912
2913         err_buf = err_iov.iov_base;
2914         if (le32_to_cpu(err_buf->ByteCount) < sizeof(struct smb2_symlink_err_rsp) ||
2915             err_iov.iov_len < SMB2_SYMLINK_STRUCT_SIZE) {
2916                 rc = -EINVAL;
2917                 goto querty_exit;
2918         }
2919
2920         symlink = (struct smb2_symlink_err_rsp *)err_buf->ErrorData;
2921         if (le32_to_cpu(symlink->SymLinkErrorTag) != SYMLINK_ERROR_TAG ||
2922             le32_to_cpu(symlink->ReparseTag) != IO_REPARSE_TAG_SYMLINK) {
2923                 rc = -EINVAL;
2924                 goto querty_exit;
2925         }
2926
2927         /* open must fail on symlink - reset rc */
2928         rc = 0;
2929         sub_len = le16_to_cpu(symlink->SubstituteNameLength);
2930         sub_offset = le16_to_cpu(symlink->SubstituteNameOffset);
2931         print_len = le16_to_cpu(symlink->PrintNameLength);
2932         print_offset = le16_to_cpu(symlink->PrintNameOffset);
2933
2934         if (err_iov.iov_len < SMB2_SYMLINK_STRUCT_SIZE + sub_offset + sub_len) {
2935                 rc = -EINVAL;
2936                 goto querty_exit;
2937         }
2938
2939         if (err_iov.iov_len <
2940             SMB2_SYMLINK_STRUCT_SIZE + print_offset + print_len) {
2941                 rc = -EINVAL;
2942                 goto querty_exit;
2943         }
2944
2945         *target_path = cifs_strndup_from_utf16(
2946                                 (char *)symlink->PathBuffer + sub_offset,
2947                                 sub_len, true, cifs_sb->local_nls);
2948         if (!(*target_path)) {
2949                 rc = -ENOMEM;
2950                 goto querty_exit;
2951         }
2952         convert_delimiter(*target_path, '/');
2953         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
2954
2955  querty_exit:
2956         cifs_dbg(FYI, "query symlink rc %d\n", rc);
2957         kfree(utf16_path);
2958         SMB2_open_free(&rqst[0]);
2959         SMB2_ioctl_free(&rqst[1]);
2960         SMB2_close_free(&rqst[2]);
2961         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2962         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2963         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
2964         return rc;
2965 }
2966
2967 static struct cifs_ntsd *
2968 get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb,
2969                 const struct cifs_fid *cifsfid, u32 *pacllen)
2970 {
2971         struct cifs_ntsd *pntsd = NULL;
2972         unsigned int xid;
2973         int rc = -EOPNOTSUPP;
2974         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
2975
2976         if (IS_ERR(tlink))
2977                 return ERR_CAST(tlink);
2978
2979         xid = get_xid();
2980         cifs_dbg(FYI, "trying to get acl\n");
2981
2982         rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid,
2983                             cifsfid->volatile_fid, (void **)&pntsd, pacllen);
2984         free_xid(xid);
2985
2986         cifs_put_tlink(tlink);
2987
2988         cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
2989         if (rc)
2990                 return ERR_PTR(rc);
2991         return pntsd;
2992
2993 }
2994
2995 static struct cifs_ntsd *
2996 get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb,
2997                 const char *path, u32 *pacllen)
2998 {
2999         struct cifs_ntsd *pntsd = NULL;
3000         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3001         unsigned int xid;
3002         int rc;
3003         struct cifs_tcon *tcon;
3004         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3005         struct cifs_fid fid;
3006         struct cifs_open_parms oparms;
3007         __le16 *utf16_path;
3008
3009         cifs_dbg(FYI, "get smb3 acl for path %s\n", path);
3010         if (IS_ERR(tlink))
3011                 return ERR_CAST(tlink);
3012
3013         tcon = tlink_tcon(tlink);
3014         xid = get_xid();
3015
3016         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
3017         if (!utf16_path) {
3018                 rc = -ENOMEM;
3019                 free_xid(xid);
3020                 return ERR_PTR(rc);
3021         }
3022
3023         oparms.tcon = tcon;
3024         oparms.desired_access = READ_CONTROL;
3025         oparms.disposition = FILE_OPEN;
3026         oparms.create_options = cifs_create_options(cifs_sb, 0);
3027         oparms.fid = &fid;
3028         oparms.reconnect = false;
3029
3030         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,
3031                        NULL);
3032         kfree(utf16_path);
3033         if (!rc) {
3034                 rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
3035                             fid.volatile_fid, (void **)&pntsd, pacllen);
3036                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
3037         }
3038
3039         cifs_put_tlink(tlink);
3040         free_xid(xid);
3041
3042         cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
3043         if (rc)
3044                 return ERR_PTR(rc);
3045         return pntsd;
3046 }
3047
3048 static int
3049 set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen,
3050                 struct inode *inode, const char *path, int aclflag)
3051 {
3052         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3053         unsigned int xid;
3054         int rc, access_flags = 0;
3055         struct cifs_tcon *tcon;
3056         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
3057         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3058         struct cifs_fid fid;
3059         struct cifs_open_parms oparms;
3060         __le16 *utf16_path;
3061
3062         cifs_dbg(FYI, "set smb3 acl for path %s\n", path);
3063         if (IS_ERR(tlink))
3064                 return PTR_ERR(tlink);
3065
3066         tcon = tlink_tcon(tlink);
3067         xid = get_xid();
3068
3069         if (aclflag == CIFS_ACL_OWNER || aclflag == CIFS_ACL_GROUP)
3070                 access_flags = WRITE_OWNER;
3071         else
3072                 access_flags = WRITE_DAC;
3073
3074         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
3075         if (!utf16_path) {
3076                 rc = -ENOMEM;
3077                 free_xid(xid);
3078                 return rc;
3079         }
3080
3081         oparms.tcon = tcon;
3082         oparms.desired_access = access_flags;
3083         oparms.create_options = cifs_create_options(cifs_sb, 0);
3084         oparms.disposition = FILE_OPEN;
3085         oparms.path = path;
3086         oparms.fid = &fid;
3087         oparms.reconnect = false;
3088
3089         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL,
3090                        NULL, NULL);
3091         kfree(utf16_path);
3092         if (!rc) {
3093                 rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
3094                             fid.volatile_fid, pnntsd, acllen, aclflag);
3095                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
3096         }
3097
3098         cifs_put_tlink(tlink);
3099         free_xid(xid);
3100         return rc;
3101 }
3102
3103 /* Retrieve an ACL from the server */
3104 static struct cifs_ntsd *
3105 get_smb2_acl(struct cifs_sb_info *cifs_sb,
3106                                       struct inode *inode, const char *path,
3107                                       u32 *pacllen)
3108 {
3109         struct cifs_ntsd *pntsd = NULL;
3110         struct cifsFileInfo *open_file = NULL;
3111
3112         if (inode)
3113                 open_file = find_readable_file(CIFS_I(inode), true);
3114         if (!open_file)
3115                 return get_smb2_acl_by_path(cifs_sb, path, pacllen);
3116
3117         pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen);
3118         cifsFileInfo_put(open_file);
3119         return pntsd;
3120 }
3121
3122 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
3123                             loff_t offset, loff_t len, bool keep_size)
3124 {
3125         struct cifs_ses *ses = tcon->ses;
3126         struct inode *inode;
3127         struct cifsInodeInfo *cifsi;
3128         struct cifsFileInfo *cfile = file->private_data;
3129         struct file_zero_data_information fsctl_buf;
3130         long rc;
3131         unsigned int xid;
3132         __le64 eof;
3133
3134         xid = get_xid();
3135
3136         inode = d_inode(cfile->dentry);
3137         cifsi = CIFS_I(inode);
3138
3139         trace_smb3_zero_enter(xid, cfile->fid.persistent_fid, tcon->tid,
3140                               ses->Suid, offset, len);
3141
3142
3143         /* if file not oplocked can't be sure whether asking to extend size */
3144         if (!CIFS_CACHE_READ(cifsi))
3145                 if (keep_size == false) {
3146                         rc = -EOPNOTSUPP;
3147                         trace_smb3_zero_err(xid, cfile->fid.persistent_fid,
3148                                 tcon->tid, ses->Suid, offset, len, rc);
3149                         free_xid(xid);
3150                         return rc;
3151                 }
3152
3153         cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
3154
3155         fsctl_buf.FileOffset = cpu_to_le64(offset);
3156         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
3157
3158         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3159                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA, true,
3160                         (char *)&fsctl_buf,
3161                         sizeof(struct file_zero_data_information),
3162                         0, NULL, NULL);
3163         if (rc)
3164                 goto zero_range_exit;
3165
3166         /*
3167          * do we also need to change the size of the file?
3168          */
3169         if (keep_size == false && i_size_read(inode) < offset + len) {
3170                 eof = cpu_to_le64(offset + len);
3171                 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3172                                   cfile->fid.volatile_fid, cfile->pid, &eof);
3173         }
3174
3175  zero_range_exit:
3176         free_xid(xid);
3177         if (rc)
3178                 trace_smb3_zero_err(xid, cfile->fid.persistent_fid, tcon->tid,
3179                               ses->Suid, offset, len, rc);
3180         else
3181                 trace_smb3_zero_done(xid, cfile->fid.persistent_fid, tcon->tid,
3182                               ses->Suid, offset, len);
3183         return rc;
3184 }
3185
3186 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
3187                             loff_t offset, loff_t len)
3188 {
3189         struct inode *inode;
3190         struct cifsFileInfo *cfile = file->private_data;
3191         struct file_zero_data_information fsctl_buf;
3192         long rc;
3193         unsigned int xid;
3194         __u8 set_sparse = 1;
3195
3196         xid = get_xid();
3197
3198         inode = d_inode(cfile->dentry);
3199
3200         /* Need to make file sparse, if not already, before freeing range. */
3201         /* Consider adding equivalent for compressed since it could also work */
3202         if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse)) {
3203                 rc = -EOPNOTSUPP;
3204                 free_xid(xid);
3205                 return rc;
3206         }
3207
3208         cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
3209
3210         fsctl_buf.FileOffset = cpu_to_le64(offset);
3211         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
3212
3213         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3214                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
3215                         true /* is_fctl */, (char *)&fsctl_buf,
3216                         sizeof(struct file_zero_data_information),
3217                         CIFSMaxBufSize, NULL, NULL);
3218         free_xid(xid);
3219         return rc;
3220 }
3221
3222 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
3223                             loff_t off, loff_t len, bool keep_size)
3224 {
3225         struct inode *inode;
3226         struct cifsInodeInfo *cifsi;
3227         struct cifsFileInfo *cfile = file->private_data;
3228         long rc = -EOPNOTSUPP;
3229         unsigned int xid;
3230         __le64 eof;
3231
3232         xid = get_xid();
3233
3234         inode = d_inode(cfile->dentry);
3235         cifsi = CIFS_I(inode);
3236
3237         trace_smb3_falloc_enter(xid, cfile->fid.persistent_fid, tcon->tid,
3238                                 tcon->ses->Suid, off, len);
3239         /* if file not oplocked can't be sure whether asking to extend size */
3240         if (!CIFS_CACHE_READ(cifsi))
3241                 if (keep_size == false) {
3242                         trace_smb3_falloc_err(xid, cfile->fid.persistent_fid,
3243                                 tcon->tid, tcon->ses->Suid, off, len, rc);
3244                         free_xid(xid);
3245                         return rc;
3246                 }
3247
3248         /*
3249          * Extending the file
3250          */
3251         if ((keep_size == false) && i_size_read(inode) < off + len) {
3252                 rc = inode_newsize_ok(inode, off + len);
3253                 if (rc)
3254                         goto out;
3255
3256                 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0)
3257                         smb2_set_sparse(xid, tcon, cfile, inode, false);
3258
3259                 eof = cpu_to_le64(off + len);
3260                 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3261                                   cfile->fid.volatile_fid, cfile->pid, &eof);
3262                 if (rc == 0) {
3263                         cifsi->server_eof = off + len;
3264                         cifs_setsize(inode, off + len);
3265                         cifs_truncate_page(inode->i_mapping, inode->i_size);
3266                         truncate_setsize(inode, off + len);
3267                 }
3268                 goto out;
3269         }
3270
3271         /*
3272          * Files are non-sparse by default so falloc may be a no-op
3273          * Must check if file sparse. If not sparse, and since we are not
3274          * extending then no need to do anything since file already allocated
3275          */
3276         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
3277                 rc = 0;
3278                 goto out;
3279         }
3280
3281         if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
3282                 /*
3283                  * Check if falloc starts within first few pages of file
3284                  * and ends within a few pages of the end of file to
3285                  * ensure that most of file is being forced to be
3286                  * fallocated now. If so then setting whole file sparse
3287                  * ie potentially making a few extra pages at the beginning
3288                  * or end of the file non-sparse via set_sparse is harmless.
3289                  */
3290                 if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) {
3291                         rc = -EOPNOTSUPP;
3292                         goto out;
3293                 }
3294         }
3295
3296         smb2_set_sparse(xid, tcon, cfile, inode, false);
3297         rc = 0;
3298
3299 out:
3300         if (rc)
3301                 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, tcon->tid,
3302                                 tcon->ses->Suid, off, len, rc);
3303         else
3304                 trace_smb3_falloc_done(xid, cfile->fid.persistent_fid, tcon->tid,
3305                                 tcon->ses->Suid, off, len);
3306
3307         free_xid(xid);
3308         return rc;
3309 }
3310
3311 static loff_t smb3_llseek(struct file *file, struct cifs_tcon *tcon, loff_t offset, int whence)
3312 {
3313         struct cifsFileInfo *wrcfile, *cfile = file->private_data;
3314         struct cifsInodeInfo *cifsi;
3315         struct inode *inode;
3316         int rc = 0;
3317         struct file_allocated_range_buffer in_data, *out_data = NULL;
3318         u32 out_data_len;
3319         unsigned int xid;
3320
3321         if (whence != SEEK_HOLE && whence != SEEK_DATA)
3322                 return generic_file_llseek(file, offset, whence);
3323
3324         inode = d_inode(cfile->dentry);
3325         cifsi = CIFS_I(inode);
3326
3327         if (offset < 0 || offset >= i_size_read(inode))
3328                 return -ENXIO;
3329
3330         xid = get_xid();
3331         /*
3332          * We need to be sure that all dirty pages are written as they
3333          * might fill holes on the server.
3334          * Note that we also MUST flush any written pages since at least
3335          * some servers (Windows2016) will not reflect recent writes in
3336          * QUERY_ALLOCATED_RANGES until SMB2_flush is called.
3337          */
3338         wrcfile = find_writable_file(cifsi, FIND_WR_ANY);
3339         if (wrcfile) {
3340                 filemap_write_and_wait(inode->i_mapping);
3341                 smb2_flush_file(xid, tcon, &wrcfile->fid);
3342                 cifsFileInfo_put(wrcfile);
3343         }
3344
3345         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) {
3346                 if (whence == SEEK_HOLE)
3347                         offset = i_size_read(inode);
3348                 goto lseek_exit;
3349         }
3350
3351         in_data.file_offset = cpu_to_le64(offset);
3352         in_data.length = cpu_to_le64(i_size_read(inode));
3353
3354         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3355                         cfile->fid.volatile_fid,
3356                         FSCTL_QUERY_ALLOCATED_RANGES, true,
3357                         (char *)&in_data, sizeof(in_data),
3358                         sizeof(struct file_allocated_range_buffer),
3359                         (char **)&out_data, &out_data_len);
3360         if (rc == -E2BIG)
3361                 rc = 0;
3362         if (rc)
3363                 goto lseek_exit;
3364
3365         if (whence == SEEK_HOLE && out_data_len == 0)
3366                 goto lseek_exit;
3367
3368         if (whence == SEEK_DATA && out_data_len == 0) {
3369                 rc = -ENXIO;
3370                 goto lseek_exit;
3371         }
3372
3373         if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
3374                 rc = -EINVAL;
3375                 goto lseek_exit;
3376         }
3377         if (whence == SEEK_DATA) {
3378                 offset = le64_to_cpu(out_data->file_offset);
3379                 goto lseek_exit;
3380         }
3381         if (offset < le64_to_cpu(out_data->file_offset))
3382                 goto lseek_exit;
3383
3384         offset = le64_to_cpu(out_data->file_offset) + le64_to_cpu(out_data->length);
3385
3386  lseek_exit:
3387         free_xid(xid);
3388         kfree(out_data);
3389         if (!rc)
3390                 return vfs_setpos(file, offset, inode->i_sb->s_maxbytes);
3391         else
3392                 return rc;
3393 }
3394
3395 static int smb3_fiemap(struct cifs_tcon *tcon,
3396                        struct cifsFileInfo *cfile,
3397                        struct fiemap_extent_info *fei, u64 start, u64 len)
3398 {
3399         unsigned int xid;
3400         struct file_allocated_range_buffer in_data, *out_data;
3401         u32 out_data_len;
3402         int i, num, rc, flags, last_blob;
3403         u64 next;
3404
3405         if (fiemap_check_flags(fei, FIEMAP_FLAG_SYNC))
3406                 return -EBADR;
3407
3408         xid = get_xid();
3409  again:
3410         in_data.file_offset = cpu_to_le64(start);
3411         in_data.length = cpu_to_le64(len);
3412
3413         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3414                         cfile->fid.volatile_fid,
3415                         FSCTL_QUERY_ALLOCATED_RANGES, true,
3416                         (char *)&in_data, sizeof(in_data),
3417                         1024 * sizeof(struct file_allocated_range_buffer),
3418                         (char **)&out_data, &out_data_len);
3419         if (rc == -E2BIG) {
3420                 last_blob = 0;
3421                 rc = 0;
3422         } else
3423                 last_blob = 1;
3424         if (rc)
3425                 goto out;
3426
3427         if (out_data_len && out_data_len < sizeof(struct file_allocated_range_buffer)) {
3428                 rc = -EINVAL;
3429                 goto out;
3430         }
3431         if (out_data_len % sizeof(struct file_allocated_range_buffer)) {
3432                 rc = -EINVAL;
3433                 goto out;
3434         }
3435
3436         num = out_data_len / sizeof(struct file_allocated_range_buffer);
3437         for (i = 0; i < num; i++) {
3438                 flags = 0;
3439                 if (i == num - 1 && last_blob)
3440                         flags |= FIEMAP_EXTENT_LAST;
3441
3442                 rc = fiemap_fill_next_extent(fei,
3443                                 le64_to_cpu(out_data[i].file_offset),
3444                                 le64_to_cpu(out_data[i].file_offset),
3445                                 le64_to_cpu(out_data[i].length),
3446                                 flags);
3447                 if (rc < 0)
3448                         goto out;
3449                 if (rc == 1) {
3450                         rc = 0;
3451                         goto out;
3452                 }
3453         }
3454
3455         if (!last_blob) {
3456                 next = le64_to_cpu(out_data[num - 1].file_offset) +
3457                   le64_to_cpu(out_data[num - 1].length);
3458                 len = len - (next - start);
3459                 start = next;
3460                 goto again;
3461         }
3462
3463  out:
3464         free_xid(xid);
3465         kfree(out_data);
3466         return rc;
3467 }
3468
3469 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
3470                            loff_t off, loff_t len)
3471 {
3472         /* KEEP_SIZE already checked for by do_fallocate */
3473         if (mode & FALLOC_FL_PUNCH_HOLE)
3474                 return smb3_punch_hole(file, tcon, off, len);
3475         else if (mode & FALLOC_FL_ZERO_RANGE) {
3476                 if (mode & FALLOC_FL_KEEP_SIZE)
3477                         return smb3_zero_range(file, tcon, off, len, true);
3478                 return smb3_zero_range(file, tcon, off, len, false);
3479         } else if (mode == FALLOC_FL_KEEP_SIZE)
3480                 return smb3_simple_falloc(file, tcon, off, len, true);
3481         else if (mode == 0)
3482                 return smb3_simple_falloc(file, tcon, off, len, false);
3483
3484         return -EOPNOTSUPP;
3485 }
3486
3487 static void
3488 smb2_downgrade_oplock(struct TCP_Server_Info *server,
3489                       struct cifsInodeInfo *cinode, __u32 oplock,
3490                       unsigned int epoch, bool *purge_cache)
3491 {
3492         server->ops->set_oplock_level(cinode, oplock, 0, NULL);
3493 }
3494
3495 static void
3496 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3497                        unsigned int epoch, bool *purge_cache);
3498
3499 static void
3500 smb3_downgrade_oplock(struct TCP_Server_Info *server,
3501                        struct cifsInodeInfo *cinode, __u32 oplock,
3502                        unsigned int epoch, bool *purge_cache)
3503 {
3504         unsigned int old_state = cinode->oplock;
3505         unsigned int old_epoch = cinode->epoch;
3506         unsigned int new_state;
3507
3508         if (epoch > old_epoch) {
3509                 smb21_set_oplock_level(cinode, oplock, 0, NULL);
3510                 cinode->epoch = epoch;
3511         }
3512
3513         new_state = cinode->oplock;
3514         *purge_cache = false;
3515
3516         if ((old_state & CIFS_CACHE_READ_FLG) != 0 &&
3517             (new_state & CIFS_CACHE_READ_FLG) == 0)
3518                 *purge_cache = true;
3519         else if (old_state == new_state && (epoch - old_epoch > 1))
3520                 *purge_cache = true;
3521 }
3522
3523 static void
3524 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3525                       unsigned int epoch, bool *purge_cache)
3526 {
3527         oplock &= 0xFF;
3528         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
3529                 return;
3530         if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
3531                 cinode->oplock = CIFS_CACHE_RHW_FLG;
3532                 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
3533                          &cinode->vfs_inode);
3534         } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
3535                 cinode->oplock = CIFS_CACHE_RW_FLG;
3536                 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
3537                          &cinode->vfs_inode);
3538         } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
3539                 cinode->oplock = CIFS_CACHE_READ_FLG;
3540                 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
3541                          &cinode->vfs_inode);
3542         } else
3543                 cinode->oplock = 0;
3544 }
3545
3546 static void
3547 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3548                        unsigned int epoch, bool *purge_cache)
3549 {
3550         char message[5] = {0};
3551         unsigned int new_oplock = 0;
3552
3553         oplock &= 0xFF;
3554         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
3555                 return;
3556
3557         /* Check if the server granted an oplock rather than a lease */
3558         if (oplock & SMB2_OPLOCK_LEVEL_EXCLUSIVE)
3559                 return smb2_set_oplock_level(cinode, oplock, epoch,
3560                                              purge_cache);
3561
3562         if (oplock & SMB2_LEASE_READ_CACHING_HE) {
3563                 new_oplock |= CIFS_CACHE_READ_FLG;
3564                 strcat(message, "R");
3565         }
3566         if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
3567                 new_oplock |= CIFS_CACHE_HANDLE_FLG;
3568                 strcat(message, "H");
3569         }
3570         if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
3571                 new_oplock |= CIFS_CACHE_WRITE_FLG;
3572                 strcat(message, "W");
3573         }
3574         if (!new_oplock)
3575                 strncpy(message, "None", sizeof(message));
3576
3577         cinode->oplock = new_oplock;
3578         cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
3579                  &cinode->vfs_inode);
3580 }
3581
3582 static void
3583 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3584                       unsigned int epoch, bool *purge_cache)
3585 {
3586         unsigned int old_oplock = cinode->oplock;
3587
3588         smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
3589
3590         if (purge_cache) {
3591                 *purge_cache = false;
3592                 if (old_oplock == CIFS_CACHE_READ_FLG) {
3593                         if (cinode->oplock == CIFS_CACHE_READ_FLG &&
3594                             (epoch - cinode->epoch > 0))
3595                                 *purge_cache = true;
3596                         else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
3597                                  (epoch - cinode->epoch > 1))
3598                                 *purge_cache = true;
3599                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
3600                                  (epoch - cinode->epoch > 1))
3601                                 *purge_cache = true;
3602                         else if (cinode->oplock == 0 &&
3603                                  (epoch - cinode->epoch > 0))
3604                                 *purge_cache = true;
3605                 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
3606                         if (cinode->oplock == CIFS_CACHE_RH_FLG &&
3607                             (epoch - cinode->epoch > 0))
3608                                 *purge_cache = true;
3609                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
3610                                  (epoch - cinode->epoch > 1))
3611                                 *purge_cache = true;
3612                 }
3613                 cinode->epoch = epoch;
3614         }
3615 }
3616
3617 static bool
3618 smb2_is_read_op(__u32 oplock)
3619 {
3620         return oplock == SMB2_OPLOCK_LEVEL_II;
3621 }
3622
3623 static bool
3624 smb21_is_read_op(__u32 oplock)
3625 {
3626         return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
3627                !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
3628 }
3629
3630 static __le32
3631 map_oplock_to_lease(u8 oplock)
3632 {
3633         if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
3634                 return SMB2_LEASE_WRITE_CACHING | SMB2_LEASE_READ_CACHING;
3635         else if (oplock == SMB2_OPLOCK_LEVEL_II)
3636                 return SMB2_LEASE_READ_CACHING;
3637         else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
3638                 return SMB2_LEASE_HANDLE_CACHING | SMB2_LEASE_READ_CACHING |
3639                        SMB2_LEASE_WRITE_CACHING;
3640         return 0;
3641 }
3642
3643 static char *
3644 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
3645 {
3646         struct create_lease *buf;
3647
3648         buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
3649         if (!buf)
3650                 return NULL;
3651
3652         memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
3653         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
3654
3655         buf->ccontext.DataOffset = cpu_to_le16(offsetof
3656                                         (struct create_lease, lcontext));
3657         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
3658         buf->ccontext.NameOffset = cpu_to_le16(offsetof
3659                                 (struct create_lease, Name));
3660         buf->ccontext.NameLength = cpu_to_le16(4);
3661         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
3662         buf->Name[0] = 'R';
3663         buf->Name[1] = 'q';
3664         buf->Name[2] = 'L';
3665         buf->Name[3] = 's';
3666         return (char *)buf;
3667 }
3668
3669 static char *
3670 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
3671 {
3672         struct create_lease_v2 *buf;
3673
3674         buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
3675         if (!buf)
3676                 return NULL;
3677
3678         memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
3679         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
3680
3681         buf->ccontext.DataOffset = cpu_to_le16(offsetof
3682                                         (struct create_lease_v2, lcontext));
3683         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
3684         buf->ccontext.NameOffset = cpu_to_le16(offsetof
3685                                 (struct create_lease_v2, Name));
3686         buf->ccontext.NameLength = cpu_to_le16(4);
3687         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
3688         buf->Name[0] = 'R';
3689         buf->Name[1] = 'q';
3690         buf->Name[2] = 'L';
3691         buf->Name[3] = 's';
3692         return (char *)buf;
3693 }
3694
3695 static __u8
3696 smb2_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
3697 {
3698         struct create_lease *lc = (struct create_lease *)buf;
3699
3700         *epoch = 0; /* not used */
3701         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
3702                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
3703         return le32_to_cpu(lc->lcontext.LeaseState);
3704 }
3705
3706 static __u8
3707 smb3_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
3708 {
3709         struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
3710
3711         *epoch = le16_to_cpu(lc->lcontext.Epoch);
3712         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
3713                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
3714         if (lease_key)
3715                 memcpy(lease_key, &lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE);
3716         return le32_to_cpu(lc->lcontext.LeaseState);
3717 }
3718
3719 static unsigned int
3720 smb2_wp_retry_size(struct inode *inode)
3721 {
3722         return min_t(unsigned int, CIFS_SB(inode->i_sb)->wsize,
3723                      SMB2_MAX_BUFFER_SIZE);
3724 }
3725
3726 static bool
3727 smb2_dir_needs_close(struct cifsFileInfo *cfile)
3728 {
3729         return !cfile->invalidHandle;
3730 }
3731
3732 static void
3733 fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len,
3734                    struct smb_rqst *old_rq, __le16 cipher_type)
3735 {
3736         struct smb2_sync_hdr *shdr =
3737                         (struct smb2_sync_hdr *)old_rq->rq_iov[0].iov_base;
3738
3739         memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr));
3740         tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
3741         tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
3742         tr_hdr->Flags = cpu_to_le16(0x01);
3743         if (cipher_type == SMB2_ENCRYPTION_AES128_GCM)
3744                 get_random_bytes(&tr_hdr->Nonce, SMB3_AES128GCM_NONCE);
3745         else
3746                 get_random_bytes(&tr_hdr->Nonce, SMB3_AES128CCM_NONCE);
3747         memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8);
3748 }
3749
3750 /* We can not use the normal sg_set_buf() as we will sometimes pass a
3751  * stack object as buf.
3752  */
3753 static inline void smb2_sg_set_buf(struct scatterlist *sg, const void *buf,
3754                                    unsigned int buflen)
3755 {
3756         void *addr;
3757         /*
3758          * VMAP_STACK (at least) puts stack into the vmalloc address space
3759          */
3760         if (is_vmalloc_addr(buf))
3761                 addr = vmalloc_to_page(buf);
3762         else
3763                 addr = virt_to_page(buf);
3764         sg_set_page(sg, addr, buflen, offset_in_page(buf));
3765 }
3766
3767 /* Assumes the first rqst has a transform header as the first iov.
3768  * I.e.
3769  * rqst[0].rq_iov[0]  is transform header
3770  * rqst[0].rq_iov[1+] data to be encrypted/decrypted
3771  * rqst[1+].rq_iov[0+] data to be encrypted/decrypted
3772  */
3773 static struct scatterlist *
3774 init_sg(int num_rqst, struct smb_rqst *rqst, u8 *sign)
3775 {
3776         unsigned int sg_len;
3777         struct scatterlist *sg;
3778         unsigned int i;
3779         unsigned int j;
3780         unsigned int idx = 0;
3781         int skip;
3782
3783         sg_len = 1;
3784         for (i = 0; i < num_rqst; i++)
3785                 sg_len += rqst[i].rq_nvec + rqst[i].rq_npages;
3786
3787         sg = kmalloc_array(sg_len, sizeof(struct scatterlist), GFP_KERNEL);
3788         if (!sg)
3789                 return NULL;
3790
3791         sg_init_table(sg, sg_len);
3792         for (i = 0; i < num_rqst; i++) {
3793                 for (j = 0; j < rqst[i].rq_nvec; j++) {
3794                         /*
3795                          * The first rqst has a transform header where the
3796                          * first 20 bytes are not part of the encrypted blob
3797                          */
3798                         skip = (i == 0) && (j == 0) ? 20 : 0;
3799                         smb2_sg_set_buf(&sg[idx++],
3800                                         rqst[i].rq_iov[j].iov_base + skip,
3801                                         rqst[i].rq_iov[j].iov_len - skip);
3802                         }
3803
3804                 for (j = 0; j < rqst[i].rq_npages; j++) {
3805                         unsigned int len, offset;
3806
3807                         rqst_page_get_length(&rqst[i], j, &len, &offset);
3808                         sg_set_page(&sg[idx++], rqst[i].rq_pages[j], len, offset);
3809                 }
3810         }
3811         smb2_sg_set_buf(&sg[idx], sign, SMB2_SIGNATURE_SIZE);
3812         return sg;
3813 }
3814
3815 static int
3816 smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key)
3817 {
3818         struct cifs_ses *ses;
3819         u8 *ses_enc_key;
3820
3821         spin_lock(&cifs_tcp_ses_lock);
3822         list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
3823                 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
3824                         if (ses->Suid == ses_id) {
3825                                 ses_enc_key = enc ? ses->smb3encryptionkey :
3826                                         ses->smb3decryptionkey;
3827                                 memcpy(key, ses_enc_key, SMB3_SIGN_KEY_SIZE);
3828                                 spin_unlock(&cifs_tcp_ses_lock);
3829                                 return 0;
3830                         }
3831                 }
3832         }
3833         spin_unlock(&cifs_tcp_ses_lock);
3834
3835         return 1;
3836 }
3837 /*
3838  * Encrypt or decrypt @rqst message. @rqst[0] has the following format:
3839  * iov[0]   - transform header (associate data),
3840  * iov[1-N] - SMB2 header and pages - data to encrypt.
3841  * On success return encrypted data in iov[1-N] and pages, leave iov[0]
3842  * untouched.
3843  */
3844 static int
3845 crypt_message(struct TCP_Server_Info *server, int num_rqst,
3846               struct smb_rqst *rqst, int enc)
3847 {
3848         struct smb2_transform_hdr *tr_hdr =
3849                 (struct smb2_transform_hdr *)rqst[0].rq_iov[0].iov_base;
3850         unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20;
3851         int rc = 0;
3852         struct scatterlist *sg;
3853         u8 sign[SMB2_SIGNATURE_SIZE] = {};
3854         u8 key[SMB3_SIGN_KEY_SIZE];
3855         struct aead_request *req;
3856         char *iv;
3857         unsigned int iv_len;
3858         DECLARE_CRYPTO_WAIT(wait);
3859         struct crypto_aead *tfm;
3860         unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
3861
3862         rc = smb2_get_enc_key(server, tr_hdr->SessionId, enc, key);
3863         if (rc) {
3864                 cifs_server_dbg(VFS, "%s: Could not get %scryption key\n", __func__,
3865                          enc ? "en" : "de");
3866                 return 0;
3867         }
3868
3869         rc = smb3_crypto_aead_allocate(server);
3870         if (rc) {
3871                 cifs_server_dbg(VFS, "%s: crypto alloc failed\n", __func__);
3872                 return rc;
3873         }
3874
3875         tfm = enc ? server->secmech.ccmaesencrypt :
3876                                                 server->secmech.ccmaesdecrypt;
3877         rc = crypto_aead_setkey(tfm, key, SMB3_SIGN_KEY_SIZE);
3878         if (rc) {
3879                 cifs_server_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc);
3880                 return rc;
3881         }
3882
3883         rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE);
3884         if (rc) {
3885                 cifs_server_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc);
3886                 return rc;
3887         }
3888
3889         req = aead_request_alloc(tfm, GFP_KERNEL);
3890         if (!req) {
3891                 cifs_server_dbg(VFS, "%s: Failed to alloc aead request\n", __func__);
3892                 return -ENOMEM;
3893         }
3894
3895         if (!enc) {
3896                 memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE);
3897                 crypt_len += SMB2_SIGNATURE_SIZE;
3898         }
3899
3900         sg = init_sg(num_rqst, rqst, sign);
3901         if (!sg) {
3902                 cifs_server_dbg(VFS, "%s: Failed to init sg\n", __func__);
3903                 rc = -ENOMEM;
3904                 goto free_req;
3905         }
3906
3907         iv_len = crypto_aead_ivsize(tfm);
3908         iv = kzalloc(iv_len, GFP_KERNEL);
3909         if (!iv) {
3910                 cifs_server_dbg(VFS, "%s: Failed to alloc iv\n", __func__);
3911                 rc = -ENOMEM;
3912                 goto free_sg;
3913         }
3914
3915         if (server->cipher_type == SMB2_ENCRYPTION_AES128_GCM)
3916                 memcpy(iv, (char *)tr_hdr->Nonce, SMB3_AES128GCM_NONCE);
3917         else {
3918                 iv[0] = 3;
3919                 memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES128CCM_NONCE);
3920         }
3921
3922         aead_request_set_crypt(req, sg, sg, crypt_len, iv);
3923         aead_request_set_ad(req, assoc_data_len);
3924
3925         aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
3926                                   crypto_req_done, &wait);
3927
3928         rc = crypto_wait_req(enc ? crypto_aead_encrypt(req)
3929                                 : crypto_aead_decrypt(req), &wait);
3930
3931         if (!rc && enc)
3932                 memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE);
3933
3934         kfree(iv);
3935 free_sg:
3936         kfree(sg);
3937 free_req:
3938         kfree(req);
3939         return rc;
3940 }
3941
3942 void
3943 smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst)
3944 {
3945         int i, j;
3946
3947         for (i = 0; i < num_rqst; i++) {
3948                 if (rqst[i].rq_pages) {
3949                         for (j = rqst[i].rq_npages - 1; j >= 0; j--)
3950                                 put_page(rqst[i].rq_pages[j]);
3951                         kfree(rqst[i].rq_pages);
3952                 }
3953         }
3954 }
3955
3956 /*
3957  * This function will initialize new_rq and encrypt the content.
3958  * The first entry, new_rq[0], only contains a single iov which contains
3959  * a smb2_transform_hdr and is pre-allocated by the caller.
3960  * This function then populates new_rq[1+] with the content from olq_rq[0+].
3961  *
3962  * The end result is an array of smb_rqst structures where the first structure
3963  * only contains a single iov for the transform header which we then can pass
3964  * to crypt_message().
3965  *
3966  * new_rq[0].rq_iov[0] :  smb2_transform_hdr pre-allocated by the caller
3967  * new_rq[1+].rq_iov[*] == old_rq[0+].rq_iov[*] : SMB2/3 requests
3968  */
3969 static int
3970 smb3_init_transform_rq(struct TCP_Server_Info *server, int num_rqst,
3971                        struct smb_rqst *new_rq, struct smb_rqst *old_rq)
3972 {
3973         struct page **pages;
3974         struct smb2_transform_hdr *tr_hdr = new_rq[0].rq_iov[0].iov_base;
3975         unsigned int npages;
3976         unsigned int orig_len = 0;
3977         int i, j;
3978         int rc = -ENOMEM;
3979
3980         for (i = 1; i < num_rqst; i++) {
3981                 npages = old_rq[i - 1].rq_npages;
3982                 pages = kmalloc_array(npages, sizeof(struct page *),
3983                                       GFP_KERNEL);
3984                 if (!pages)
3985                         goto err_free;
3986
3987                 new_rq[i].rq_pages = pages;
3988                 new_rq[i].rq_npages = npages;
3989                 new_rq[i].rq_offset = old_rq[i - 1].rq_offset;
3990                 new_rq[i].rq_pagesz = old_rq[i - 1].rq_pagesz;
3991                 new_rq[i].rq_tailsz = old_rq[i - 1].rq_tailsz;
3992                 new_rq[i].rq_iov = old_rq[i - 1].rq_iov;
3993                 new_rq[i].rq_nvec = old_rq[i - 1].rq_nvec;
3994
3995                 orig_len += smb_rqst_len(server, &old_rq[i - 1]);
3996
3997                 for (j = 0; j < npages; j++) {
3998                         pages[j] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
3999                         if (!pages[j])
4000                                 goto err_free;
4001                 }
4002
4003                 /* copy pages form the old */
4004                 for (j = 0; j < npages; j++) {
4005                         char *dst, *src;
4006                         unsigned int offset, len;
4007
4008                         rqst_page_get_length(&new_rq[i], j, &len, &offset);
4009
4010                         dst = (char *) kmap(new_rq[i].rq_pages[j]) + offset;
4011                         src = (char *) kmap(old_rq[i - 1].rq_pages[j]) + offset;
4012
4013                         memcpy(dst, src, len);
4014                         kunmap(new_rq[i].rq_pages[j]);
4015                         kunmap(old_rq[i - 1].rq_pages[j]);
4016                 }
4017         }
4018
4019         /* fill the 1st iov with a transform header */
4020         fill_transform_hdr(tr_hdr, orig_len, old_rq, server->cipher_type);
4021
4022         rc = crypt_message(server, num_rqst, new_rq, 1);
4023         cifs_dbg(FYI, "Encrypt message returned %d\n", rc);
4024         if (rc)
4025                 goto err_free;
4026
4027         return rc;
4028
4029 err_free:
4030         smb3_free_compound_rqst(num_rqst - 1, &new_rq[1]);
4031         return rc;
4032 }
4033
4034 static int
4035 smb3_is_transform_hdr(void *buf)
4036 {
4037         struct smb2_transform_hdr *trhdr = buf;
4038
4039         return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
4040 }
4041
4042 static int
4043 decrypt_raw_data(struct TCP_Server_Info *server, char *buf,
4044                  unsigned int buf_data_size, struct page **pages,
4045                  unsigned int npages, unsigned int page_data_size)
4046 {
4047         struct kvec iov[2];
4048         struct smb_rqst rqst = {NULL};
4049         int rc;
4050
4051         iov[0].iov_base = buf;
4052         iov[0].iov_len = sizeof(struct smb2_transform_hdr);
4053         iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr);
4054         iov[1].iov_len = buf_data_size;
4055
4056         rqst.rq_iov = iov;
4057         rqst.rq_nvec = 2;
4058         rqst.rq_pages = pages;
4059         rqst.rq_npages = npages;
4060         rqst.rq_pagesz = PAGE_SIZE;
4061         rqst.rq_tailsz = (page_data_size % PAGE_SIZE) ? : PAGE_SIZE;
4062
4063         rc = crypt_message(server, 1, &rqst, 0);
4064         cifs_dbg(FYI, "Decrypt message returned %d\n", rc);
4065
4066         if (rc)
4067                 return rc;
4068
4069         memmove(buf, iov[1].iov_base, buf_data_size);
4070
4071         server->total_read = buf_data_size + page_data_size;
4072
4073         return rc;
4074 }
4075
4076 static int
4077 read_data_into_pages(struct TCP_Server_Info *server, struct page **pages,
4078                      unsigned int npages, unsigned int len)
4079 {
4080         int i;
4081         int length;
4082
4083         for (i = 0; i < npages; i++) {
4084                 struct page *page = pages[i];
4085                 size_t n;
4086
4087                 n = len;
4088                 if (len >= PAGE_SIZE) {
4089                         /* enough data to fill the page */
4090                         n = PAGE_SIZE;
4091                         len -= n;
4092                 } else {
4093                         zero_user(page, len, PAGE_SIZE - len);
4094                         len = 0;
4095                 }
4096                 length = cifs_read_page_from_socket(server, page, 0, n);
4097                 if (length < 0)
4098                         return length;
4099                 server->total_read += length;
4100         }
4101
4102         return 0;
4103 }
4104
4105 static int
4106 init_read_bvec(struct page **pages, unsigned int npages, unsigned int data_size,
4107                unsigned int cur_off, struct bio_vec **page_vec)
4108 {
4109         struct bio_vec *bvec;
4110         int i;
4111
4112         bvec = kcalloc(npages, sizeof(struct bio_vec), GFP_KERNEL);
4113         if (!bvec)
4114                 return -ENOMEM;
4115
4116         for (i = 0; i < npages; i++) {
4117                 bvec[i].bv_page = pages[i];
4118                 bvec[i].bv_offset = (i == 0) ? cur_off : 0;
4119                 bvec[i].bv_len = min_t(unsigned int, PAGE_SIZE, data_size);
4120                 data_size -= bvec[i].bv_len;
4121         }
4122
4123         if (data_size != 0) {
4124                 cifs_dbg(VFS, "%s: something went wrong\n", __func__);
4125                 kfree(bvec);
4126                 return -EIO;
4127         }
4128
4129         *page_vec = bvec;
4130         return 0;
4131 }
4132
4133 static int
4134 handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid,
4135                  char *buf, unsigned int buf_len, struct page **pages,
4136                  unsigned int npages, unsigned int page_data_size)
4137 {
4138         unsigned int data_offset;
4139         unsigned int data_len;
4140         unsigned int cur_off;
4141         unsigned int cur_page_idx;
4142         unsigned int pad_len;
4143         struct cifs_readdata *rdata = mid->callback_data;
4144         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
4145         struct bio_vec *bvec = NULL;
4146         struct iov_iter iter;
4147         struct kvec iov;
4148         int length;
4149         bool use_rdma_mr = false;
4150
4151         if (shdr->Command != SMB2_READ) {
4152                 cifs_server_dbg(VFS, "only big read responses are supported\n");
4153                 return -ENOTSUPP;
4154         }
4155
4156         if (server->ops->is_session_expired &&
4157             server->ops->is_session_expired(buf)) {
4158                 cifs_reconnect(server);
4159                 return -1;
4160         }
4161
4162         if (server->ops->is_status_pending &&
4163                         server->ops->is_status_pending(buf, server))
4164                 return -1;
4165
4166         /* set up first two iov to get credits */
4167         rdata->iov[0].iov_base = buf;
4168         rdata->iov[0].iov_len = 0;
4169         rdata->iov[1].iov_base = buf;
4170         rdata->iov[1].iov_len =
4171                 min_t(unsigned int, buf_len, server->vals->read_rsp_size);
4172         cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n",
4173                  rdata->iov[0].iov_base, rdata->iov[0].iov_len);
4174         cifs_dbg(FYI, "1: iov_base=%p iov_len=%zu\n",
4175                  rdata->iov[1].iov_base, rdata->iov[1].iov_len);
4176
4177         rdata->result = server->ops->map_error(buf, true);
4178         if (rdata->result != 0) {
4179                 cifs_dbg(FYI, "%s: server returned error %d\n",
4180                          __func__, rdata->result);
4181                 /* normal error on read response */
4182                 dequeue_mid(mid, false);
4183                 return 0;
4184         }
4185
4186         data_offset = server->ops->read_data_offset(buf);
4187 #ifdef CONFIG_CIFS_SMB_DIRECT
4188         use_rdma_mr = rdata->mr;
4189 #endif
4190         data_len = server->ops->read_data_length(buf, use_rdma_mr);
4191
4192         if (data_offset < server->vals->read_rsp_size) {
4193                 /*
4194                  * win2k8 sometimes sends an offset of 0 when the read
4195                  * is beyond the EOF. Treat it as if the data starts just after
4196                  * the header.
4197                  */
4198                 cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n",
4199                          __func__, data_offset);
4200                 data_offset = server->vals->read_rsp_size;
4201         } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) {
4202                 /* data_offset is beyond the end of smallbuf */
4203                 cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n",
4204                          __func__, data_offset);
4205                 rdata->result = -EIO;
4206                 dequeue_mid(mid, rdata->result);
4207                 return 0;
4208         }
4209
4210         pad_len = data_offset - server->vals->read_rsp_size;
4211
4212         if (buf_len <= data_offset) {
4213                 /* read response payload is in pages */
4214                 cur_page_idx = pad_len / PAGE_SIZE;
4215                 cur_off = pad_len % PAGE_SIZE;
4216
4217                 if (cur_page_idx != 0) {
4218                         /* data offset is beyond the 1st page of response */
4219                         cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n",
4220                                  __func__, data_offset);
4221                         rdata->result = -EIO;
4222                         dequeue_mid(mid, rdata->result);
4223                         return 0;
4224                 }
4225
4226                 if (data_len > page_data_size - pad_len) {
4227                         /* data_len is corrupt -- discard frame */
4228                         rdata->result = -EIO;
4229                         dequeue_mid(mid, rdata->result);
4230                         return 0;
4231                 }
4232
4233                 rdata->result = init_read_bvec(pages, npages, page_data_size,
4234                                                cur_off, &bvec);
4235                 if (rdata->result != 0) {
4236                         dequeue_mid(mid, rdata->result);
4237                         return 0;
4238                 }
4239
4240                 iov_iter_bvec(&iter, WRITE, bvec, npages, data_len);
4241         } else if (buf_len >= data_offset + data_len) {
4242                 /* read response payload is in buf */
4243                 WARN_ONCE(npages > 0, "read data can be either in buf or in pages");
4244                 iov.iov_base = buf + data_offset;
4245                 iov.iov_len = data_len;
4246                 iov_iter_kvec(&iter, WRITE, &iov, 1, data_len);
4247         } else {
4248                 /* read response payload cannot be in both buf and pages */
4249                 WARN_ONCE(1, "buf can not contain only a part of read data");
4250                 rdata->result = -EIO;
4251                 dequeue_mid(mid, rdata->result);
4252                 return 0;
4253         }
4254
4255         length = rdata->copy_into_pages(server, rdata, &iter);
4256
4257         kfree(bvec);
4258
4259         if (length < 0)
4260                 return length;
4261
4262         dequeue_mid(mid, false);
4263         return length;
4264 }
4265
4266 struct smb2_decrypt_work {
4267         struct work_struct decrypt;
4268         struct TCP_Server_Info *server;
4269         struct page **ppages;
4270         char *buf;
4271         unsigned int npages;
4272         unsigned int len;
4273 };
4274
4275
4276 static void smb2_decrypt_offload(struct work_struct *work)
4277 {
4278         struct smb2_decrypt_work *dw = container_of(work,
4279                                 struct smb2_decrypt_work, decrypt);
4280         int i, rc;
4281         struct mid_q_entry *mid;
4282
4283         rc = decrypt_raw_data(dw->server, dw->buf, dw->server->vals->read_rsp_size,
4284                               dw->ppages, dw->npages, dw->len);
4285         if (rc) {
4286                 cifs_dbg(VFS, "error decrypting rc=%d\n", rc);
4287                 goto free_pages;
4288         }
4289
4290         dw->server->lstrp = jiffies;
4291         mid = smb2_find_mid(dw->server, dw->buf);
4292         if (mid == NULL)
4293                 cifs_dbg(FYI, "mid not found\n");
4294         else {
4295                 mid->decrypted = true;
4296                 rc = handle_read_data(dw->server, mid, dw->buf,
4297                                       dw->server->vals->read_rsp_size,
4298                                       dw->ppages, dw->npages, dw->len);
4299                 mid->callback(mid);
4300                 cifs_mid_q_entry_release(mid);
4301         }
4302
4303 free_pages:
4304         for (i = dw->npages-1; i >= 0; i--)
4305                 put_page(dw->ppages[i]);
4306
4307         kfree(dw->ppages);
4308         cifs_small_buf_release(dw->buf);
4309         kfree(dw);
4310 }
4311
4312
4313 static int
4314 receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid,
4315                        int *num_mids)
4316 {
4317         char *buf = server->smallbuf;
4318         struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
4319         unsigned int npages;
4320         struct page **pages;
4321         unsigned int len;
4322         unsigned int buflen = server->pdu_size;
4323         int rc;
4324         int i = 0;
4325         struct smb2_decrypt_work *dw;
4326
4327         *num_mids = 1;
4328         len = min_t(unsigned int, buflen, server->vals->read_rsp_size +
4329                 sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1;
4330
4331         rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len);
4332         if (rc < 0)
4333                 return rc;
4334         server->total_read += rc;
4335
4336         len = le32_to_cpu(tr_hdr->OriginalMessageSize) -
4337                 server->vals->read_rsp_size;
4338         npages = DIV_ROUND_UP(len, PAGE_SIZE);
4339
4340         pages = kmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
4341         if (!pages) {
4342                 rc = -ENOMEM;
4343                 goto discard_data;
4344         }
4345
4346         for (; i < npages; i++) {
4347                 pages[i] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
4348                 if (!pages[i]) {
4349                         rc = -ENOMEM;
4350                         goto discard_data;
4351                 }
4352         }
4353
4354         /* read read data into pages */
4355         rc = read_data_into_pages(server, pages, npages, len);
4356         if (rc)
4357                 goto free_pages;
4358
4359         rc = cifs_discard_remaining_data(server);
4360         if (rc)
4361                 goto free_pages;
4362
4363         /*
4364          * For large reads, offload to different thread for better performance,
4365          * use more cores decrypting which can be expensive
4366          */
4367
4368         if ((server->min_offload) && (server->in_flight > 1) &&
4369             (server->pdu_size >= server->min_offload)) {
4370                 dw = kmalloc(sizeof(struct smb2_decrypt_work), GFP_KERNEL);
4371                 if (dw == NULL)
4372                         goto non_offloaded_decrypt;
4373
4374                 dw->buf = server->smallbuf;
4375                 server->smallbuf = (char *)cifs_small_buf_get();
4376
4377                 INIT_WORK(&dw->decrypt, smb2_decrypt_offload);
4378
4379                 dw->npages = npages;
4380                 dw->server = server;
4381                 dw->ppages = pages;
4382                 dw->len = len;
4383                 queue_work(decrypt_wq, &dw->decrypt);
4384                 *num_mids = 0; /* worker thread takes care of finding mid */
4385                 return -1;
4386         }
4387
4388 non_offloaded_decrypt:
4389         rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size,
4390                               pages, npages, len);
4391         if (rc)
4392                 goto free_pages;
4393
4394         *mid = smb2_find_mid(server, buf);
4395         if (*mid == NULL)
4396                 cifs_dbg(FYI, "mid not found\n");
4397         else {
4398                 cifs_dbg(FYI, "mid found\n");
4399                 (*mid)->decrypted = true;
4400                 rc = handle_read_data(server, *mid, buf,
4401                                       server->vals->read_rsp_size,
4402                                       pages, npages, len);
4403         }
4404
4405 free_pages:
4406         for (i = i - 1; i >= 0; i--)
4407                 put_page(pages[i]);
4408         kfree(pages);
4409         return rc;
4410 discard_data:
4411         cifs_discard_remaining_data(server);
4412         goto free_pages;
4413 }
4414
4415 static int
4416 receive_encrypted_standard(struct TCP_Server_Info *server,
4417                            struct mid_q_entry **mids, char **bufs,
4418                            int *num_mids)
4419 {
4420         int ret, length;
4421         char *buf = server->smallbuf;
4422         struct smb2_sync_hdr *shdr;
4423         unsigned int pdu_length = server->pdu_size;
4424         unsigned int buf_size;
4425         struct mid_q_entry *mid_entry;
4426         int next_is_large;
4427         char *next_buffer = NULL;
4428
4429         *num_mids = 0;
4430
4431         /* switch to large buffer if too big for a small one */
4432         if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE) {
4433                 server->large_buf = true;
4434                 memcpy(server->bigbuf, buf, server->total_read);
4435                 buf = server->bigbuf;
4436         }
4437
4438         /* now read the rest */
4439         length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
4440                                 pdu_length - HEADER_SIZE(server) + 1);
4441         if (length < 0)
4442                 return length;
4443         server->total_read += length;
4444
4445         buf_size = pdu_length - sizeof(struct smb2_transform_hdr);
4446         length = decrypt_raw_data(server, buf, buf_size, NULL, 0, 0);
4447         if (length)
4448                 return length;
4449
4450         next_is_large = server->large_buf;
4451 one_more:
4452         shdr = (struct smb2_sync_hdr *)buf;
4453         if (shdr->NextCommand) {
4454                 if (next_is_large)
4455                         next_buffer = (char *)cifs_buf_get();
4456                 else
4457                         next_buffer = (char *)cifs_small_buf_get();
4458                 memcpy(next_buffer,
4459                        buf + le32_to_cpu(shdr->NextCommand),
4460                        pdu_length - le32_to_cpu(shdr->NextCommand));
4461         }
4462
4463         mid_entry = smb2_find_mid(server, buf);
4464         if (mid_entry == NULL)
4465                 cifs_dbg(FYI, "mid not found\n");
4466         else {
4467                 cifs_dbg(FYI, "mid found\n");
4468                 mid_entry->decrypted = true;
4469                 mid_entry->resp_buf_size = server->pdu_size;
4470         }
4471
4472         if (*num_mids >= MAX_COMPOUND) {
4473                 cifs_server_dbg(VFS, "too many PDUs in compound\n");
4474                 return -1;
4475         }
4476         bufs[*num_mids] = buf;
4477         mids[(*num_mids)++] = mid_entry;
4478
4479         if (mid_entry && mid_entry->handle)
4480                 ret = mid_entry->handle(server, mid_entry);
4481         else
4482                 ret = cifs_handle_standard(server, mid_entry);
4483
4484         if (ret == 0 && shdr->NextCommand) {
4485                 pdu_length -= le32_to_cpu(shdr->NextCommand);
4486                 server->large_buf = next_is_large;
4487                 if (next_is_large)
4488                         server->bigbuf = buf = next_buffer;
4489                 else
4490                         server->smallbuf = buf = next_buffer;
4491                 goto one_more;
4492         } else if (ret != 0) {
4493                 /*
4494                  * ret != 0 here means that we didn't get to handle_mid() thus
4495                  * server->smallbuf and server->bigbuf are still valid. We need
4496                  * to free next_buffer because it is not going to be used
4497                  * anywhere.
4498                  */
4499                 if (next_is_large)
4500                         free_rsp_buf(CIFS_LARGE_BUFFER, next_buffer);
4501                 else
4502                         free_rsp_buf(CIFS_SMALL_BUFFER, next_buffer);
4503         }
4504
4505         return ret;
4506 }
4507
4508 static int
4509 smb3_receive_transform(struct TCP_Server_Info *server,
4510                        struct mid_q_entry **mids, char **bufs, int *num_mids)
4511 {
4512         char *buf = server->smallbuf;
4513         unsigned int pdu_length = server->pdu_size;
4514         struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
4515         unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
4516
4517         if (pdu_length < sizeof(struct smb2_transform_hdr) +
4518                                                 sizeof(struct smb2_sync_hdr)) {
4519                 cifs_server_dbg(VFS, "Transform message is too small (%u)\n",
4520                          pdu_length);
4521                 cifs_reconnect(server);
4522                 return -ECONNABORTED;
4523         }
4524
4525         if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) {
4526                 cifs_server_dbg(VFS, "Transform message is broken\n");
4527                 cifs_reconnect(server);
4528                 return -ECONNABORTED;
4529         }
4530
4531         /* TODO: add support for compounds containing READ. */
4532         if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server)) {
4533                 return receive_encrypted_read(server, &mids[0], num_mids);
4534         }
4535
4536         return receive_encrypted_standard(server, mids, bufs, num_mids);
4537 }
4538
4539 int
4540 smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid)
4541 {
4542         char *buf = server->large_buf ? server->bigbuf : server->smallbuf;
4543
4544         return handle_read_data(server, mid, buf, server->pdu_size,
4545                                 NULL, 0, 0);
4546 }
4547
4548 static int
4549 smb2_next_header(char *buf)
4550 {
4551         struct smb2_sync_hdr *hdr = (struct smb2_sync_hdr *)buf;
4552         struct smb2_transform_hdr *t_hdr = (struct smb2_transform_hdr *)buf;
4553
4554         if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM)
4555                 return sizeof(struct smb2_transform_hdr) +
4556                   le32_to_cpu(t_hdr->OriginalMessageSize);
4557
4558         return le32_to_cpu(hdr->NextCommand);
4559 }
4560
4561 static int
4562 smb2_make_node(unsigned int xid, struct inode *inode,
4563                struct dentry *dentry, struct cifs_tcon *tcon,
4564                char *full_path, umode_t mode, dev_t dev)
4565 {
4566         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
4567         int rc = -EPERM;
4568         FILE_ALL_INFO *buf = NULL;
4569         struct cifs_io_parms io_parms;
4570         __u32 oplock = 0;
4571         struct cifs_fid fid;
4572         struct cifs_open_parms oparms;
4573         unsigned int bytes_written;
4574         struct win_dev *pdev;
4575         struct kvec iov[2];
4576
4577         /*
4578          * Check if mounted with mount parm 'sfu' mount parm.
4579          * SFU emulation should work with all servers, but only
4580          * supports block and char device (no socket & fifo),
4581          * and was used by default in earlier versions of Windows
4582          */
4583         if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL))
4584                 goto out;
4585
4586         /*
4587          * TODO: Add ability to create instead via reparse point. Windows (e.g.
4588          * their current NFS server) uses this approach to expose special files
4589          * over SMB2/SMB3 and Samba will do this with SMB3.1.1 POSIX Extensions
4590          */
4591
4592         if (!S_ISCHR(mode) && !S_ISBLK(mode))
4593                 goto out;
4594
4595         cifs_dbg(FYI, "sfu compat create special file\n");
4596
4597         buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
4598         if (buf == NULL) {
4599                 rc = -ENOMEM;
4600                 goto out;
4601         }
4602
4603         oparms.tcon = tcon;
4604         oparms.cifs_sb = cifs_sb;
4605         oparms.desired_access = GENERIC_WRITE;
4606         oparms.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR |
4607                                                     CREATE_OPTION_SPECIAL);
4608         oparms.disposition = FILE_CREATE;
4609         oparms.path = full_path;
4610         oparms.fid = &fid;
4611         oparms.reconnect = false;
4612
4613         if (tcon->ses->server->oplocks)
4614                 oplock = REQ_OPLOCK;
4615         else
4616                 oplock = 0;
4617         rc = tcon->ses->server->ops->open(xid, &oparms, &oplock, buf);
4618         if (rc)
4619                 goto out;
4620
4621         /*
4622          * BB Do not bother to decode buf since no local inode yet to put
4623          * timestamps in, but we can reuse it safely.
4624          */
4625
4626         pdev = (struct win_dev *)buf;
4627         io_parms.pid = current->tgid;
4628         io_parms.tcon = tcon;
4629         io_parms.offset = 0;
4630         io_parms.length = sizeof(struct win_dev);
4631         iov[1].iov_base = buf;
4632         iov[1].iov_len = sizeof(struct win_dev);
4633         if (S_ISCHR(mode)) {
4634                 memcpy(pdev->type, "IntxCHR", 8);
4635                 pdev->major = cpu_to_le64(MAJOR(dev));
4636                 pdev->minor = cpu_to_le64(MINOR(dev));
4637                 rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
4638                                                         &bytes_written, iov, 1);
4639         } else if (S_ISBLK(mode)) {
4640                 memcpy(pdev->type, "IntxBLK", 8);
4641                 pdev->major = cpu_to_le64(MAJOR(dev));
4642                 pdev->minor = cpu_to_le64(MINOR(dev));
4643                 rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
4644                                                         &bytes_written, iov, 1);
4645         }
4646         tcon->ses->server->ops->close(xid, tcon, &fid);
4647         d_drop(dentry);
4648
4649         /* FIXME: add code here to set EAs */
4650 out:
4651         kfree(buf);
4652         return rc;
4653 }
4654
4655
4656 struct smb_version_operations smb20_operations = {
4657         .compare_fids = smb2_compare_fids,
4658         .setup_request = smb2_setup_request,
4659         .setup_async_request = smb2_setup_async_request,
4660         .check_receive = smb2_check_receive,
4661         .add_credits = smb2_add_credits,
4662         .set_credits = smb2_set_credits,
4663         .get_credits_field = smb2_get_credits_field,
4664         .get_credits = smb2_get_credits,
4665         .wait_mtu_credits = cifs_wait_mtu_credits,
4666         .get_next_mid = smb2_get_next_mid,
4667         .revert_current_mid = smb2_revert_current_mid,
4668         .read_data_offset = smb2_read_data_offset,
4669         .read_data_length = smb2_read_data_length,
4670         .map_error = map_smb2_to_linux_error,
4671         .find_mid = smb2_find_mid,
4672         .check_message = smb2_check_message,
4673         .dump_detail = smb2_dump_detail,
4674         .clear_stats = smb2_clear_stats,
4675         .print_stats = smb2_print_stats,
4676         .is_oplock_break = smb2_is_valid_oplock_break,
4677         .handle_cancelled_mid = smb2_handle_cancelled_mid,
4678         .downgrade_oplock = smb2_downgrade_oplock,
4679         .need_neg = smb2_need_neg,
4680         .negotiate = smb2_negotiate,
4681         .negotiate_wsize = smb2_negotiate_wsize,
4682         .negotiate_rsize = smb2_negotiate_rsize,
4683         .sess_setup = SMB2_sess_setup,
4684         .logoff = SMB2_logoff,
4685         .tree_connect = SMB2_tcon,
4686         .tree_disconnect = SMB2_tdis,
4687         .qfs_tcon = smb2_qfs_tcon,
4688         .is_path_accessible = smb2_is_path_accessible,
4689         .can_echo = smb2_can_echo,
4690         .echo = SMB2_echo,
4691         .query_path_info = smb2_query_path_info,
4692         .get_srv_inum = smb2_get_srv_inum,
4693         .query_file_info = smb2_query_file_info,
4694         .set_path_size = smb2_set_path_size,
4695         .set_file_size = smb2_set_file_size,
4696         .set_file_info = smb2_set_file_info,
4697         .set_compression = smb2_set_compression,
4698         .mkdir = smb2_mkdir,
4699         .mkdir_setinfo = smb2_mkdir_setinfo,
4700         .rmdir = smb2_rmdir,
4701         .unlink = smb2_unlink,
4702         .rename = smb2_rename_path,
4703         .create_hardlink = smb2_create_hardlink,
4704         .query_symlink = smb2_query_symlink,
4705         .query_mf_symlink = smb3_query_mf_symlink,
4706         .create_mf_symlink = smb3_create_mf_symlink,
4707         .open = smb2_open_file,
4708         .set_fid = smb2_set_fid,
4709         .close = smb2_close_file,
4710         .flush = smb2_flush_file,
4711         .async_readv = smb2_async_readv,
4712         .async_writev = smb2_async_writev,
4713         .sync_read = smb2_sync_read,
4714         .sync_write = smb2_sync_write,
4715         .query_dir_first = smb2_query_dir_first,
4716         .query_dir_next = smb2_query_dir_next,
4717         .close_dir = smb2_close_dir,
4718         .calc_smb_size = smb2_calc_size,
4719         .is_status_pending = smb2_is_status_pending,
4720         .is_session_expired = smb2_is_session_expired,
4721         .oplock_response = smb2_oplock_response,
4722         .queryfs = smb2_queryfs,
4723         .mand_lock = smb2_mand_lock,
4724         .mand_unlock_range = smb2_unlock_range,
4725         .push_mand_locks = smb2_push_mandatory_locks,
4726         .get_lease_key = smb2_get_lease_key,
4727         .set_lease_key = smb2_set_lease_key,
4728         .new_lease_key = smb2_new_lease_key,
4729         .calc_signature = smb2_calc_signature,
4730         .is_read_op = smb2_is_read_op,
4731         .set_oplock_level = smb2_set_oplock_level,
4732         .create_lease_buf = smb2_create_lease_buf,
4733         .parse_lease_buf = smb2_parse_lease_buf,
4734         .copychunk_range = smb2_copychunk_range,
4735         .wp_retry_size = smb2_wp_retry_size,
4736         .dir_needs_close = smb2_dir_needs_close,
4737         .get_dfs_refer = smb2_get_dfs_refer,
4738         .select_sectype = smb2_select_sectype,
4739 #ifdef CONFIG_CIFS_XATTR
4740         .query_all_EAs = smb2_query_eas,
4741         .set_EA = smb2_set_ea,
4742 #endif /* CIFS_XATTR */
4743         .get_acl = get_smb2_acl,
4744         .get_acl_by_fid = get_smb2_acl_by_fid,
4745         .set_acl = set_smb2_acl,
4746         .next_header = smb2_next_header,
4747         .ioctl_query_info = smb2_ioctl_query_info,
4748         .make_node = smb2_make_node,
4749         .fiemap = smb3_fiemap,
4750         .llseek = smb3_llseek,
4751 };
4752
4753 struct smb_version_operations smb21_operations = {
4754         .compare_fids = smb2_compare_fids,
4755         .setup_request = smb2_setup_request,
4756         .setup_async_request = smb2_setup_async_request,
4757         .check_receive = smb2_check_receive,
4758         .add_credits = smb2_add_credits,
4759         .set_credits = smb2_set_credits,
4760         .get_credits_field = smb2_get_credits_field,
4761         .get_credits = smb2_get_credits,
4762         .wait_mtu_credits = smb2_wait_mtu_credits,
4763         .adjust_credits = smb2_adjust_credits,
4764         .get_next_mid = smb2_get_next_mid,
4765         .revert_current_mid = smb2_revert_current_mid,
4766         .read_data_offset = smb2_read_data_offset,
4767         .read_data_length = smb2_read_data_length,
4768         .map_error = map_smb2_to_linux_error,
4769         .find_mid = smb2_find_mid,
4770         .check_message = smb2_check_message,
4771         .dump_detail = smb2_dump_detail,
4772         .clear_stats = smb2_clear_stats,
4773         .print_stats = smb2_print_stats,
4774         .is_oplock_break = smb2_is_valid_oplock_break,
4775         .handle_cancelled_mid = smb2_handle_cancelled_mid,
4776         .downgrade_oplock = smb2_downgrade_oplock,
4777         .need_neg = smb2_need_neg,
4778         .negotiate = smb2_negotiate,
4779         .negotiate_wsize = smb2_negotiate_wsize,
4780         .negotiate_rsize = smb2_negotiate_rsize,
4781         .sess_setup = SMB2_sess_setup,
4782         .logoff = SMB2_logoff,
4783         .tree_connect = SMB2_tcon,
4784         .tree_disconnect = SMB2_tdis,
4785         .qfs_tcon = smb2_qfs_tcon,
4786         .is_path_accessible = smb2_is_path_accessible,
4787         .can_echo = smb2_can_echo,
4788         .echo = SMB2_echo,
4789         .query_path_info = smb2_query_path_info,
4790         .get_srv_inum = smb2_get_srv_inum,
4791         .query_file_info = smb2_query_file_info,
4792         .set_path_size = smb2_set_path_size,
4793         .set_file_size = smb2_set_file_size,
4794         .set_file_info = smb2_set_file_info,
4795         .set_compression = smb2_set_compression,
4796         .mkdir = smb2_mkdir,
4797         .mkdir_setinfo = smb2_mkdir_setinfo,
4798         .rmdir = smb2_rmdir,
4799         .unlink = smb2_unlink,
4800         .rename = smb2_rename_path,
4801         .create_hardlink = smb2_create_hardlink,
4802         .query_symlink = smb2_query_symlink,
4803         .query_mf_symlink = smb3_query_mf_symlink,
4804         .create_mf_symlink = smb3_create_mf_symlink,
4805         .open = smb2_open_file,
4806         .set_fid = smb2_set_fid,
4807         .close = smb2_close_file,
4808         .flush = smb2_flush_file,
4809         .async_readv = smb2_async_readv,
4810         .async_writev = smb2_async_writev,
4811         .sync_read = smb2_sync_read,
4812         .sync_write = smb2_sync_write,
4813         .query_dir_first = smb2_query_dir_first,
4814         .query_dir_next = smb2_query_dir_next,
4815         .close_dir = smb2_close_dir,
4816         .calc_smb_size = smb2_calc_size,
4817         .is_status_pending = smb2_is_status_pending,
4818         .is_session_expired = smb2_is_session_expired,
4819         .oplock_response = smb2_oplock_response,
4820         .queryfs = smb2_queryfs,
4821         .mand_lock = smb2_mand_lock,
4822         .mand_unlock_range = smb2_unlock_range,
4823         .push_mand_locks = smb2_push_mandatory_locks,
4824         .get_lease_key = smb2_get_lease_key,
4825         .set_lease_key = smb2_set_lease_key,
4826         .new_lease_key = smb2_new_lease_key,
4827         .calc_signature = smb2_calc_signature,
4828         .is_read_op = smb21_is_read_op,
4829         .set_oplock_level = smb21_set_oplock_level,
4830         .create_lease_buf = smb2_create_lease_buf,
4831         .parse_lease_buf = smb2_parse_lease_buf,
4832         .copychunk_range = smb2_copychunk_range,
4833         .wp_retry_size = smb2_wp_retry_size,
4834         .dir_needs_close = smb2_dir_needs_close,
4835         .enum_snapshots = smb3_enum_snapshots,
4836         .notify = smb3_notify,
4837         .get_dfs_refer = smb2_get_dfs_refer,
4838         .select_sectype = smb2_select_sectype,
4839 #ifdef CONFIG_CIFS_XATTR
4840         .query_all_EAs = smb2_query_eas,
4841         .set_EA = smb2_set_ea,
4842 #endif /* CIFS_XATTR */
4843         .get_acl = get_smb2_acl,
4844         .get_acl_by_fid = get_smb2_acl_by_fid,
4845         .set_acl = set_smb2_acl,
4846         .next_header = smb2_next_header,
4847         .ioctl_query_info = smb2_ioctl_query_info,
4848         .make_node = smb2_make_node,
4849         .fiemap = smb3_fiemap,
4850         .llseek = smb3_llseek,
4851 };
4852
4853 struct smb_version_operations smb30_operations = {
4854         .compare_fids = smb2_compare_fids,
4855         .setup_request = smb2_setup_request,
4856         .setup_async_request = smb2_setup_async_request,
4857         .check_receive = smb2_check_receive,
4858         .add_credits = smb2_add_credits,
4859         .set_credits = smb2_set_credits,
4860         .get_credits_field = smb2_get_credits_field,
4861         .get_credits = smb2_get_credits,
4862         .wait_mtu_credits = smb2_wait_mtu_credits,
4863         .adjust_credits = smb2_adjust_credits,
4864         .get_next_mid = smb2_get_next_mid,
4865         .revert_current_mid = smb2_revert_current_mid,
4866         .read_data_offset = smb2_read_data_offset,
4867         .read_data_length = smb2_read_data_length,
4868         .map_error = map_smb2_to_linux_error,
4869         .find_mid = smb2_find_mid,
4870         .check_message = smb2_check_message,
4871         .dump_detail = smb2_dump_detail,
4872         .clear_stats = smb2_clear_stats,
4873         .print_stats = smb2_print_stats,
4874         .dump_share_caps = smb2_dump_share_caps,
4875         .is_oplock_break = smb2_is_valid_oplock_break,
4876         .handle_cancelled_mid = smb2_handle_cancelled_mid,
4877         .downgrade_oplock = smb3_downgrade_oplock,
4878         .need_neg = smb2_need_neg,
4879         .negotiate = smb2_negotiate,
4880         .negotiate_wsize = smb3_negotiate_wsize,
4881         .negotiate_rsize = smb3_negotiate_rsize,
4882         .sess_setup = SMB2_sess_setup,
4883         .logoff = SMB2_logoff,
4884         .tree_connect = SMB2_tcon,
4885         .tree_disconnect = SMB2_tdis,
4886         .qfs_tcon = smb3_qfs_tcon,
4887         .is_path_accessible = smb2_is_path_accessible,
4888         .can_echo = smb2_can_echo,
4889         .echo = SMB2_echo,
4890         .query_path_info = smb2_query_path_info,
4891         .get_srv_inum = smb2_get_srv_inum,
4892         .query_file_info = smb2_query_file_info,
4893         .set_path_size = smb2_set_path_size,
4894         .set_file_size = smb2_set_file_size,
4895         .set_file_info = smb2_set_file_info,
4896         .set_compression = smb2_set_compression,
4897         .mkdir = smb2_mkdir,
4898         .mkdir_setinfo = smb2_mkdir_setinfo,
4899         .rmdir = smb2_rmdir,
4900         .unlink = smb2_unlink,
4901         .rename = smb2_rename_path,
4902         .create_hardlink = smb2_create_hardlink,
4903         .query_symlink = smb2_query_symlink,
4904         .query_mf_symlink = smb3_query_mf_symlink,
4905         .create_mf_symlink = smb3_create_mf_symlink,
4906         .open = smb2_open_file,
4907         .set_fid = smb2_set_fid,
4908         .close = smb2_close_file,
4909         .close_getattr = smb2_close_getattr,
4910         .flush = smb2_flush_file,
4911         .async_readv = smb2_async_readv,
4912         .async_writev = smb2_async_writev,
4913         .sync_read = smb2_sync_read,
4914         .sync_write = smb2_sync_write,
4915         .query_dir_first = smb2_query_dir_first,
4916         .query_dir_next = smb2_query_dir_next,
4917         .close_dir = smb2_close_dir,
4918         .calc_smb_size = smb2_calc_size,
4919         .is_status_pending = smb2_is_status_pending,
4920         .is_session_expired = smb2_is_session_expired,
4921         .oplock_response = smb2_oplock_response,
4922         .queryfs = smb2_queryfs,
4923         .mand_lock = smb2_mand_lock,
4924         .mand_unlock_range = smb2_unlock_range,
4925         .push_mand_locks = smb2_push_mandatory_locks,
4926         .get_lease_key = smb2_get_lease_key,
4927         .set_lease_key = smb2_set_lease_key,
4928         .new_lease_key = smb2_new_lease_key,
4929         .generate_signingkey = generate_smb30signingkey,
4930         .calc_signature = smb3_calc_signature,
4931         .set_integrity  = smb3_set_integrity,
4932         .is_read_op = smb21_is_read_op,
4933         .set_oplock_level = smb3_set_oplock_level,
4934         .create_lease_buf = smb3_create_lease_buf,
4935         .parse_lease_buf = smb3_parse_lease_buf,
4936         .copychunk_range = smb2_copychunk_range,
4937         .duplicate_extents = smb2_duplicate_extents,
4938         .validate_negotiate = smb3_validate_negotiate,
4939         .wp_retry_size = smb2_wp_retry_size,
4940         .dir_needs_close = smb2_dir_needs_close,
4941         .fallocate = smb3_fallocate,
4942         .enum_snapshots = smb3_enum_snapshots,
4943         .notify = smb3_notify,
4944         .init_transform_rq = smb3_init_transform_rq,
4945         .is_transform_hdr = smb3_is_transform_hdr,
4946         .receive_transform = smb3_receive_transform,
4947         .get_dfs_refer = smb2_get_dfs_refer,
4948         .select_sectype = smb2_select_sectype,
4949 #ifdef CONFIG_CIFS_XATTR
4950         .query_all_EAs = smb2_query_eas,
4951         .set_EA = smb2_set_ea,
4952 #endif /* CIFS_XATTR */
4953         .get_acl = get_smb2_acl,
4954         .get_acl_by_fid = get_smb2_acl_by_fid,
4955         .set_acl = set_smb2_acl,
4956         .next_header = smb2_next_header,
4957         .ioctl_query_info = smb2_ioctl_query_info,
4958         .make_node = smb2_make_node,
4959         .fiemap = smb3_fiemap,
4960         .llseek = smb3_llseek,
4961 };
4962
4963 struct smb_version_operations smb311_operations = {
4964         .compare_fids = smb2_compare_fids,
4965         .setup_request = smb2_setup_request,
4966         .setup_async_request = smb2_setup_async_request,
4967         .check_receive = smb2_check_receive,
4968         .add_credits = smb2_add_credits,
4969         .set_credits = smb2_set_credits,
4970         .get_credits_field = smb2_get_credits_field,
4971         .get_credits = smb2_get_credits,
4972         .wait_mtu_credits = smb2_wait_mtu_credits,
4973         .adjust_credits = smb2_adjust_credits,
4974         .get_next_mid = smb2_get_next_mid,
4975         .revert_current_mid = smb2_revert_current_mid,
4976         .read_data_offset = smb2_read_data_offset,
4977         .read_data_length = smb2_read_data_length,
4978         .map_error = map_smb2_to_linux_error,
4979         .find_mid = smb2_find_mid,
4980         .check_message = smb2_check_message,
4981         .dump_detail = smb2_dump_detail,
4982         .clear_stats = smb2_clear_stats,
4983         .print_stats = smb2_print_stats,
4984         .dump_share_caps = smb2_dump_share_caps,
4985         .is_oplock_break = smb2_is_valid_oplock_break,
4986         .handle_cancelled_mid = smb2_handle_cancelled_mid,
4987         .downgrade_oplock = smb3_downgrade_oplock,
4988         .need_neg = smb2_need_neg,
4989         .negotiate = smb2_negotiate,
4990         .negotiate_wsize = smb3_negotiate_wsize,
4991         .negotiate_rsize = smb3_negotiate_rsize,
4992         .sess_setup = SMB2_sess_setup,
4993         .logoff = SMB2_logoff,
4994         .tree_connect = SMB2_tcon,
4995         .tree_disconnect = SMB2_tdis,
4996         .qfs_tcon = smb3_qfs_tcon,
4997         .is_path_accessible = smb2_is_path_accessible,
4998         .can_echo = smb2_can_echo,
4999         .echo = SMB2_echo,
5000         .query_path_info = smb2_query_path_info,
5001         .get_srv_inum = smb2_get_srv_inum,
5002         .query_file_info = smb2_query_file_info,
5003         .set_path_size = smb2_set_path_size,
5004         .set_file_size = smb2_set_file_size,
5005         .set_file_info = smb2_set_file_info,
5006         .set_compression = smb2_set_compression,
5007         .mkdir = smb2_mkdir,
5008         .mkdir_setinfo = smb2_mkdir_setinfo,
5009         .posix_mkdir = smb311_posix_mkdir,
5010         .rmdir = smb2_rmdir,
5011         .unlink = smb2_unlink,
5012         .rename = smb2_rename_path,
5013         .create_hardlink = smb2_create_hardlink,
5014         .query_symlink = smb2_query_symlink,
5015         .query_mf_symlink = smb3_query_mf_symlink,
5016         .create_mf_symlink = smb3_create_mf_symlink,
5017         .open = smb2_open_file,
5018         .set_fid = smb2_set_fid,
5019         .close = smb2_close_file,
5020         .close_getattr = smb2_close_getattr,
5021         .flush = smb2_flush_file,
5022         .async_readv = smb2_async_readv,
5023         .async_writev = smb2_async_writev,
5024         .sync_read = smb2_sync_read,
5025         .sync_write = smb2_sync_write,
5026         .query_dir_first = smb2_query_dir_first,
5027         .query_dir_next = smb2_query_dir_next,
5028         .close_dir = smb2_close_dir,
5029         .calc_smb_size = smb2_calc_size,
5030         .is_status_pending = smb2_is_status_pending,
5031         .is_session_expired = smb2_is_session_expired,
5032         .oplock_response = smb2_oplock_response,
5033         .queryfs = smb311_queryfs,
5034         .mand_lock = smb2_mand_lock,
5035         .mand_unlock_range = smb2_unlock_range,
5036         .push_mand_locks = smb2_push_mandatory_locks,
5037         .get_lease_key = smb2_get_lease_key,
5038         .set_lease_key = smb2_set_lease_key,
5039         .new_lease_key = smb2_new_lease_key,
5040         .generate_signingkey = generate_smb311signingkey,
5041         .calc_signature = smb3_calc_signature,
5042         .set_integrity  = smb3_set_integrity,
5043         .is_read_op = smb21_is_read_op,
5044         .set_oplock_level = smb3_set_oplock_level,
5045         .create_lease_buf = smb3_create_lease_buf,
5046         .parse_lease_buf = smb3_parse_lease_buf,
5047         .copychunk_range = smb2_copychunk_range,
5048         .duplicate_extents = smb2_duplicate_extents,
5049 /*      .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
5050         .wp_retry_size = smb2_wp_retry_size,
5051         .dir_needs_close = smb2_dir_needs_close,
5052         .fallocate = smb3_fallocate,
5053         .enum_snapshots = smb3_enum_snapshots,
5054         .notify = smb3_notify,
5055         .init_transform_rq = smb3_init_transform_rq,
5056         .is_transform_hdr = smb3_is_transform_hdr,
5057         .receive_transform = smb3_receive_transform,
5058         .get_dfs_refer = smb2_get_dfs_refer,
5059         .select_sectype = smb2_select_sectype,
5060 #ifdef CONFIG_CIFS_XATTR
5061         .query_all_EAs = smb2_query_eas,
5062         .set_EA = smb2_set_ea,
5063 #endif /* CIFS_XATTR */
5064         .get_acl = get_smb2_acl,
5065         .get_acl_by_fid = get_smb2_acl_by_fid,
5066         .set_acl = set_smb2_acl,
5067         .next_header = smb2_next_header,
5068         .ioctl_query_info = smb2_ioctl_query_info,
5069         .make_node = smb2_make_node,
5070         .fiemap = smb3_fiemap,
5071         .llseek = smb3_llseek,
5072 };
5073
5074 struct smb_version_values smb20_values = {
5075         .version_string = SMB20_VERSION_STRING,
5076         .protocol_id = SMB20_PROT_ID,
5077         .req_capabilities = 0, /* MBZ */
5078         .large_lock_type = 0,
5079         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5080         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5081         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5082         .header_size = sizeof(struct smb2_sync_hdr),
5083         .header_preamble_size = 0,
5084         .max_header_size = MAX_SMB2_HDR_SIZE,
5085         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5086         .lock_cmd = SMB2_LOCK,
5087         .cap_unix = 0,
5088         .cap_nt_find = SMB2_NT_FIND,
5089         .cap_large_files = SMB2_LARGE_FILES,
5090         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5091         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5092         .create_lease_size = sizeof(struct create_lease),
5093 };
5094
5095 struct smb_version_values smb21_values = {
5096         .version_string = SMB21_VERSION_STRING,
5097         .protocol_id = SMB21_PROT_ID,
5098         .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
5099         .large_lock_type = 0,
5100         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5101         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5102         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5103         .header_size = sizeof(struct smb2_sync_hdr),
5104         .header_preamble_size = 0,
5105         .max_header_size = MAX_SMB2_HDR_SIZE,
5106         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5107         .lock_cmd = SMB2_LOCK,
5108         .cap_unix = 0,
5109         .cap_nt_find = SMB2_NT_FIND,
5110         .cap_large_files = SMB2_LARGE_FILES,
5111         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5112         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5113         .create_lease_size = sizeof(struct create_lease),
5114 };
5115
5116 struct smb_version_values smb3any_values = {
5117         .version_string = SMB3ANY_VERSION_STRING,
5118         .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
5119         .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,
5120         .large_lock_type = 0,
5121         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5122         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5123         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5124         .header_size = sizeof(struct smb2_sync_hdr),
5125         .header_preamble_size = 0,
5126         .max_header_size = MAX_SMB2_HDR_SIZE,
5127         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5128         .lock_cmd = SMB2_LOCK,
5129         .cap_unix = 0,
5130         .cap_nt_find = SMB2_NT_FIND,
5131         .cap_large_files = SMB2_LARGE_FILES,
5132         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5133         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5134         .create_lease_size = sizeof(struct create_lease_v2),
5135 };
5136
5137 struct smb_version_values smbdefault_values = {
5138         .version_string = SMBDEFAULT_VERSION_STRING,
5139         .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
5140         .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,
5141         .large_lock_type = 0,
5142         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5143         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5144         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5145         .header_size = sizeof(struct smb2_sync_hdr),
5146         .header_preamble_size = 0,
5147         .max_header_size = MAX_SMB2_HDR_SIZE,
5148         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5149         .lock_cmd = SMB2_LOCK,
5150         .cap_unix = 0,
5151         .cap_nt_find = SMB2_NT_FIND,
5152         .cap_large_files = SMB2_LARGE_FILES,
5153         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5154         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5155         .create_lease_size = sizeof(struct create_lease_v2),
5156 };
5157
5158 struct smb_version_values smb30_values = {
5159         .version_string = SMB30_VERSION_STRING,
5160         .protocol_id = SMB30_PROT_ID,
5161         .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,
5162         .large_lock_type = 0,
5163         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5164         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5165         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5166         .header_size = sizeof(struct smb2_sync_hdr),
5167         .header_preamble_size = 0,
5168         .max_header_size = MAX_SMB2_HDR_SIZE,
5169         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5170         .lock_cmd = SMB2_LOCK,
5171         .cap_unix = 0,
5172         .cap_nt_find = SMB2_NT_FIND,
5173         .cap_large_files = SMB2_LARGE_FILES,
5174         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5175         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5176         .create_lease_size = sizeof(struct create_lease_v2),
5177 };
5178
5179 struct smb_version_values smb302_values = {
5180         .version_string = SMB302_VERSION_STRING,
5181         .protocol_id = SMB302_PROT_ID,
5182         .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,
5183         .large_lock_type = 0,
5184         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5185         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5186         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5187         .header_size = sizeof(struct smb2_sync_hdr),
5188         .header_preamble_size = 0,
5189         .max_header_size = MAX_SMB2_HDR_SIZE,
5190         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5191         .lock_cmd = SMB2_LOCK,
5192         .cap_unix = 0,
5193         .cap_nt_find = SMB2_NT_FIND,
5194         .cap_large_files = SMB2_LARGE_FILES,
5195         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5196         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5197         .create_lease_size = sizeof(struct create_lease_v2),
5198 };
5199
5200 struct smb_version_values smb311_values = {
5201         .version_string = SMB311_VERSION_STRING,
5202         .protocol_id = SMB311_PROT_ID,
5203         .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,
5204         .large_lock_type = 0,
5205         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5206         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5207         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5208         .header_size = sizeof(struct smb2_sync_hdr),
5209         .header_preamble_size = 0,
5210         .max_header_size = MAX_SMB2_HDR_SIZE,
5211         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5212         .lock_cmd = SMB2_LOCK,
5213         .cap_unix = 0,
5214         .cap_nt_find = SMB2_NT_FIND,
5215         .cap_large_files = SMB2_LARGE_FILES,
5216         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5217         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5218         .create_lease_size = sizeof(struct create_lease_v2),
5219 };