fs/cifs/smb2ops.c

   1 /*
   2  *  SMB2 version specific operations
   3  *
   4  *  Copyright (c) 2012, Jeff Layton <jlayton@redhat.com>
   5  *
   6  *  This library is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License v2 as published
   8  *  by the Free Software Foundation.
   9  *
  10  *  This library is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
  13  *  the GNU Lesser General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU Lesser General Public License
  16  *  along with this library; if not, write to the Free Software
  17  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  18  */
  19
  20 #include <linux/pagemap.h>
  21 #include <linux/vfs.h>
  22 #include <linux/falloc.h>
  23 #include <linux/scatterlist.h>
  24 #include <linux/uuid.h>
  25 #include <crypto/aead.h>
  26 #include "cifsglob.h"
  27 #include "smb2pdu.h"
  28 #include "smb2proto.h"
  29 #include "cifsproto.h"
  30 #include "cifs_debug.h"
  31 #include "cifs_unicode.h"
  32 #include "smb2status.h"
  33 #include "smb2glob.h"
  34 #include "cifs_ioctl.h"
  35 #include "smbdirect.h"
  36
  37 static int
  38 change_conf(struct TCP_Server_Info *server)
  39 {
  40         server->credits += server->echo_credits + server->oplock_credits;
  41         server->oplock_credits = server->echo_credits = 0;
  42         switch (server->credits) {
  43         case 0:
  44                 return -1;
  45         case 1:
  46                 server->echoes = false;
  47                 server->oplocks = false;
  48                 cifs_dbg(VFS, "disabling echoes and oplocks\n");
  49                 break;
  50         case 2:
  51                 server->echoes = true;
  52                 server->oplocks = false;
  53                 server->echo_credits = 1;
  54                 cifs_dbg(FYI, "disabling oplocks\n");
  55                 break;
  56         default:
  57                 server->echoes = true;
  58                 if (enable_oplocks) {
  59                         server->oplocks = true;
  60                         server->oplock_credits = 1;
  61                 } else
  62                         server->oplocks = false;
  63
  64                 server->echo_credits = 1;
  65         }
  66         server->credits -= server->echo_credits + server->oplock_credits;
  67         return 0;
  68 }
  69
  70 static void
  71 smb2_add_credits(struct TCP_Server_Info *server, const unsigned int add,
  72                  const int optype)
  73 {
  74         int *val, rc = 0;
  75         spin_lock(&server->req_lock);
  76         val = server->ops->get_credits_field(server, optype);
  77         *val += add;
  78         if (*val > 65000) {
  79                 *val = 65000; /* Don't get near 64K credits, avoid srv bugs */
  80                 printk_once(KERN_WARNING "server overflowed SMB3 credits\n");
  81         }
  82         server->in_flight--;
  83         if (server->in_flight == 0 && (optype & CIFS_OP_MASK) != CIFS_NEG_OP)
  84                 rc = change_conf(server);
  85         /*
  86          * Sometimes server returns 0 credits on oplock break ack - we need to
  87          * rebalance credits in this case.
  88          */
  89         else if (server->in_flight > 0 && server->oplock_credits == 0 &&
  90                  server->oplocks) {
  91                 if (server->credits > 1) {
  92                         server->credits--;
  93                         server->oplock_credits++;
  94                 }
  95         }
  96         spin_unlock(&server->req_lock);
  97         wake_up(&server->request_q);
  98         if (rc)
  99                 cifs_reconnect(server);
 100 }
 101
 102 static void
 103 smb2_set_credits(struct TCP_Server_Info *server, const int val)
 104 {
 105         spin_lock(&server->req_lock);
 106         server->credits = val;
 107         spin_unlock(&server->req_lock);
 108 }
 109
 110 static int *
 111 smb2_get_credits_field(struct TCP_Server_Info *server, const int optype)
 112 {
 113         switch (optype) {
 114         case CIFS_ECHO_OP:
 115                 return &server->echo_credits;
 116         case CIFS_OBREAK_OP:
 117                 return &server->oplock_credits;
 118         default:
 119                 return &server->credits;
 120         }
 121 }
 122
 123 static unsigned int
 124 smb2_get_credits(struct mid_q_entry *mid)
 125 {
 126         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)mid->resp_buf;
 127
 128         return le16_to_cpu(shdr->CreditRequest);
 129 }
 130
 131 static int
 132 smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size,
 133                       unsigned int *num, unsigned int *credits)
 134 {
 135         int rc = 0;
 136         unsigned int scredits;
 137
 138         spin_lock(&server->req_lock);
 139         while (1) {
 140                 if (server->credits <= 0) {
 141                         spin_unlock(&server->req_lock);
 142                         cifs_num_waiters_inc(server);
 143                         rc = wait_event_killable(server->request_q,
 144                                         has_credits(server, &server->credits));
 145                         cifs_num_waiters_dec(server);
 146                         if (rc)
 147                                 return rc;
 148                         spin_lock(&server->req_lock);
 149                 } else {
 150                         if (server->tcpStatus == CifsExiting) {
 151                                 spin_unlock(&server->req_lock);
 152                                 return -ENOENT;
 153                         }
 154
 155                         scredits = server->credits;
 156                         /* can deadlock with reopen */
 157                         if (scredits == 1) {
 158                                 *num = SMB2_MAX_BUFFER_SIZE;
 159                                 *credits = 0;
 160                                 break;
 161                         }
 162
 163                         /* leave one credit for a possible reopen */
 164                         scredits--;
 165                         *num = min_t(unsigned int, size,
 166                                      scredits * SMB2_MAX_BUFFER_SIZE);
 167
 168                         *credits = DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE);
 169                         server->credits -= *credits;
 170                         server->in_flight++;
 171                         break;
 172                 }
 173         }
 174         spin_unlock(&server->req_lock);
 175         return rc;
 176 }
 177
 178 static __u64
 179 smb2_get_next_mid(struct TCP_Server_Info *server)
 180 {
 181         __u64 mid;
 182         /* for SMB2 we need the current value */
 183         spin_lock(&GlobalMid_Lock);
 184         mid = server->CurrentMid++;
 185         spin_unlock(&GlobalMid_Lock);
 186         return mid;
 187 }
 188
 189 static struct mid_q_entry *
 190 smb2_find_mid(struct TCP_Server_Info *server, char *buf)
 191 {
 192         struct mid_q_entry *mid;
 193         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
 194         __u64 wire_mid = le64_to_cpu(shdr->MessageId);
 195
 196         if (shdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {
 197                 cifs_dbg(VFS, "encrypted frame parsing not supported yet");
 198                 return NULL;
 199         }
 200
 201         spin_lock(&GlobalMid_Lock);
 202         list_for_each_entry(mid, &server->pending_mid_q, qhead) {
 203                 if ((mid->mid == wire_mid) &&
 204                     (mid->mid_state == MID_REQUEST_SUBMITTED) &&
 205                     (mid->command == shdr->Command)) {
 206                         kref_get(&mid->refcount);
 207                         spin_unlock(&GlobalMid_Lock);
 208                         return mid;
 209                 }
 210         }
 211         spin_unlock(&GlobalMid_Lock);
 212         return NULL;
 213 }
 214
 215 static void
 216 smb2_dump_detail(void *buf, struct TCP_Server_Info *server)
 217 {
 218 #ifdef CONFIG_CIFS_DEBUG2
 219         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
 220
 221         cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
 222                  shdr->Command, shdr->Status, shdr->Flags, shdr->MessageId,
 223                  shdr->ProcessId);
 224         cifs_dbg(VFS, "smb buf %p len %u\n", buf,
 225                  server->ops->calc_smb_size(buf, server));
 226 #endif
 227 }
 228
 229 static bool
 230 smb2_need_neg(struct TCP_Server_Info *server)
 231 {
 232         return server->max_read == 0;
 233 }
 234
 235 static int
 236 smb2_negotiate(const unsigned int xid, struct cifs_ses *ses)
 237 {
 238         int rc;
 239         ses->server->CurrentMid = 0;
 240         rc = SMB2_negotiate(xid, ses);
 241         /* BB we probably don't need to retry with modern servers */
 242         if (rc == -EAGAIN)
 243                 rc = -EHOSTDOWN;
 244         return rc;
 245 }
 246
 247 static unsigned int
 248 smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 249 {
 250         struct TCP_Server_Info *server = tcon->ses->server;
 251         unsigned int wsize;
 252
 253         /* start with specified wsize, or default */
 254         wsize = volume_info->wsize ? volume_info->wsize : CIFS_DEFAULT_IOSIZE;
 255         wsize = min_t(unsigned int, wsize, server->max_write);
 256 #ifdef CONFIG_CIFS_SMB_DIRECT
 257         if (server->rdma) {
 258                 if (server->sign)
 259                         wsize = min_t(unsigned int,
 260                                 wsize, server->smbd_conn->max_fragmented_send_size);
 261                 else
 262                         wsize = min_t(unsigned int,
 263                                 wsize, server->smbd_conn->max_readwrite_size);
 264         }
 265 #endif
 266         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 267                 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
 268
 269         return wsize;
 270 }
 271
 272 static unsigned int
 273 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 274 {
 275         struct TCP_Server_Info *server = tcon->ses->server;
 276         unsigned int rsize;
 277
 278         /* start with specified rsize, or default */
 279         rsize = volume_info->rsize ? volume_info->rsize : CIFS_DEFAULT_IOSIZE;
 280         rsize = min_t(unsigned int, rsize, server->max_read);
 281 #ifdef CONFIG_CIFS_SMB_DIRECT
 282         if (server->rdma) {
 283                 if (server->sign)
 284                         rsize = min_t(unsigned int,
 285                                 rsize, server->smbd_conn->max_fragmented_recv_size);
 286                 else
 287                         rsize = min_t(unsigned int,
 288                                 rsize, server->smbd_conn->max_readwrite_size);
 289         }
 290 #endif
 291
 292         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 293                 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
 294
 295         return rsize;
 296 }
 297
 298
 299 static int
 300 parse_server_interfaces(struct network_interface_info_ioctl_rsp *buf,
 301                         size_t buf_len,
 302                         struct cifs_server_iface **iface_list,
 303                         size_t *iface_count)
 304 {
 305         struct network_interface_info_ioctl_rsp *p;
 306         struct sockaddr_in *addr4;
 307         struct sockaddr_in6 *addr6;
 308         struct iface_info_ipv4 *p4;
 309         struct iface_info_ipv6 *p6;
 310         struct cifs_server_iface *info;
 311         ssize_t bytes_left;
 312         size_t next = 0;
 313         int nb_iface = 0;
 314         int rc = 0;
 315
 316         *iface_list = NULL;
 317         *iface_count = 0;
 318
 319         /*
 320          * Fist pass: count and sanity check
 321          */
 322
 323         bytes_left = buf_len;
 324         p = buf;
 325         while (bytes_left >= sizeof(*p)) {
 326                 nb_iface++;
 327                 next = le32_to_cpu(p->Next);
 328                 if (!next) {
 329                         bytes_left -= sizeof(*p);
 330                         break;
 331                 }
 332                 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next);
 333                 bytes_left -= next;
 334         }
 335
 336         if (!nb_iface) {
 337                 cifs_dbg(VFS, "%s: malformed interface info\n", __func__);
 338                 rc = -EINVAL;
 339                 goto out;
 340         }
 341
 342         if (bytes_left || p->Next)
 343                 cifs_dbg(VFS, "%s: incomplete interface info\n", __func__);
 344
 345
 346         /*
 347          * Second pass: extract info to internal structure
 348          */
 349
 350         *iface_list = kcalloc(nb_iface, sizeof(**iface_list), GFP_KERNEL);
 351         if (!*iface_list) {
 352                 rc = -ENOMEM;
 353                 goto out;
 354         }
 355
 356         info = *iface_list;
 357         bytes_left = buf_len;
 358         p = buf;
 359         while (bytes_left >= sizeof(*p)) {
 360                 info->speed = le64_to_cpu(p->LinkSpeed);
 361                 info->rdma_capable = le32_to_cpu(p->Capability & RDMA_CAPABLE);
 362                 info->rss_capable = le32_to_cpu(p->Capability & RSS_CAPABLE);
 363
 364                 cifs_dbg(FYI, "%s: adding iface %zu\n", __func__, *iface_count);
 365                 cifs_dbg(FYI, "%s: speed %zu bps\n", __func__, info->speed);
 366                 cifs_dbg(FYI, "%s: capabilities 0x%08x\n", __func__,
 367                          le32_to_cpu(p->Capability));
 368
 369                 switch (p->Family) {
 370                 /*
 371                  * The kernel and wire socket structures have the same
 372                  * layout and use network byte order but make the
 373                  * conversion explicit in case either one changes.
 374                  */
 375                 case INTERNETWORK:
 376                         addr4 = (struct sockaddr_in *)&info->sockaddr;
 377                         p4 = (struct iface_info_ipv4 *)p->Buffer;
 378                         addr4->sin_family = AF_INET;
 379                         memcpy(&addr4->sin_addr, &p4->IPv4Address, 4);
 380
 381                         /* [MS-SMB2] 2.2.32.5.1.1 Clients MUST ignore these */
 382                         addr4->sin_port = cpu_to_be16(CIFS_PORT);
 383
 384                         cifs_dbg(FYI, "%s: ipv4 %pI4\n", __func__,
 385                                  &addr4->sin_addr);
 386                         break;
 387                 case INTERNETWORKV6:
 388                         addr6 = (struct sockaddr_in6 *)&info->sockaddr;
 389                         p6 = (struct iface_info_ipv6 *)p->Buffer;
 390                         addr6->sin6_family = AF_INET6;
 391                         memcpy(&addr6->sin6_addr, &p6->IPv6Address, 16);
 392
 393                         /* [MS-SMB2] 2.2.32.5.1.2 Clients MUST ignore these */
 394                         addr6->sin6_flowinfo = 0;
 395                         addr6->sin6_scope_id = 0;
 396                         addr6->sin6_port = cpu_to_be16(CIFS_PORT);
 397
 398                         cifs_dbg(FYI, "%s: ipv6 %pI6\n", __func__,
 399                                  &addr6->sin6_addr);
 400                         break;
 401                 default:
 402                         cifs_dbg(VFS,
 403                                  "%s: skipping unsupported socket family\n",
 404                                  __func__);
 405                         goto next_iface;
 406                 }
 407
 408                 (*iface_count)++;
 409                 info++;
 410 next_iface:
 411                 next = le32_to_cpu(p->Next);
 412                 if (!next)
 413                         break;
 414                 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next);
 415                 bytes_left -= next;
 416         }
 417
 418         if (!*iface_count) {
 419                 rc = -EINVAL;
 420                 goto out;
 421         }
 422
 423 out:
 424         if (rc) {
 425                 kfree(*iface_list);
 426                 *iface_count = 0;
 427                 *iface_list = NULL;
 428         }
 429         return rc;
 430 }
 431
 432
 433 static int
 434 SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon)
 435 {
 436         int rc;
 437         unsigned int ret_data_len = 0;
 438         struct network_interface_info_ioctl_rsp *out_buf = NULL;
 439         struct cifs_server_iface *iface_list;
 440         size_t iface_count;
 441         struct cifs_ses *ses = tcon->ses;
 442
 443         rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
 444                         FSCTL_QUERY_NETWORK_INTERFACE_INFO, true /* is_fsctl */,
 445                         NULL /* no data input */, 0 /* no data input */,
 446                         (char **)&out_buf, &ret_data_len);
 447         if (rc == -EOPNOTSUPP) {
 448                 cifs_dbg(FYI,
 449                          "server does not support query network interfaces\n");
 450                 goto out;
 451         } else if (rc != 0) {
 452                 cifs_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
 453                 goto out;
 454         }
 455
 456         rc = parse_server_interfaces(out_buf, ret_data_len,
 457                                      &iface_list, &iface_count);
 458         if (rc)
 459                 goto out;
 460
 461         spin_lock(&ses->iface_lock);
 462         kfree(ses->iface_list);
 463         ses->iface_list = iface_list;
 464         ses->iface_count = iface_count;
 465         ses->iface_last_update = jiffies;
 466         spin_unlock(&ses->iface_lock);
 467
 468 out:
 469         kfree(out_buf);
 470         return rc;
 471 }
 472
 473 static void
 474 smb2_close_cached_fid(struct kref *ref)
 475 {
 476         struct cached_fid *cfid = container_of(ref, struct cached_fid,
 477                                                refcount);
 478
 479         if (cfid->is_valid) {
 480                 cifs_dbg(FYI, "clear cached root file handle\n");
 481                 SMB2_close(0, cfid->tcon, cfid->fid->persistent_fid,
 482                            cfid->fid->volatile_fid);
 483                 cfid->is_valid = false;
 484         }
 485 }
 486
 487 void close_shroot(struct cached_fid *cfid)
 488 {
 489         mutex_lock(&cfid->fid_mutex);
 490         kref_put(&cfid->refcount, smb2_close_cached_fid);
 491         mutex_unlock(&cfid->fid_mutex);
 492 }
 493
 494 void
 495 smb2_cached_lease_break(struct work_struct *work)
 496 {
 497         struct cached_fid *cfid = container_of(work,
 498                                 struct cached_fid, lease_break);
 499
 500         close_shroot(cfid);
 501 }
 502
 503 /*
 504  * Open the directory at the root of a share
 505  */
 506 int open_shroot(unsigned int xid, struct cifs_tcon *tcon, struct cifs_fid *pfid)
 507 {
 508         struct cifs_open_parms oparams;
 509         int rc;
 510         __le16 srch_path = 0; /* Null - since an open of top of share */
 511         u8 oplock = SMB2_OPLOCK_LEVEL_II;
 512
 513         mutex_lock(&tcon->crfid.fid_mutex);
 514         if (tcon->crfid.is_valid) {
 515                 cifs_dbg(FYI, "found a cached root file handle\n");
 516                 memcpy(pfid, tcon->crfid.fid, sizeof(struct cifs_fid));
 517                 kref_get(&tcon->crfid.refcount);
 518                 mutex_unlock(&tcon->crfid.fid_mutex);
 519                 return 0;
 520         }
 521
 522         oparams.tcon = tcon;
 523         oparams.create_options = 0;
 524         oparams.desired_access = FILE_READ_ATTRIBUTES;
 525         oparams.disposition = FILE_OPEN;
 526         oparams.fid = pfid;
 527         oparams.reconnect = false;
 528
 529         rc = SMB2_open(xid, &oparams, &srch_path, &oplock, NULL, NULL, NULL);
 530         if (rc == 0) {
 531                 memcpy(tcon->crfid.fid, pfid, sizeof(struct cifs_fid));
 532                 tcon->crfid.tcon = tcon;
 533                 tcon->crfid.is_valid = true;
 534                 kref_init(&tcon->crfid.refcount);
 535                 kref_get(&tcon->crfid.refcount);
 536         }
 537         mutex_unlock(&tcon->crfid.fid_mutex);
 538         return rc;
 539 }
 540
 541 static void
 542 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
 543 {
 544         int rc;
 545         __le16 srch_path = 0; /* Null - open root of share */
 546         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 547         struct cifs_open_parms oparms;
 548         struct cifs_fid fid;
 549         bool no_cached_open = tcon->nohandlecache;
 550
 551         oparms.tcon = tcon;
 552         oparms.desired_access = FILE_READ_ATTRIBUTES;
 553         oparms.disposition = FILE_OPEN;
 554         oparms.create_options = 0;
 555         oparms.fid = &fid;
 556         oparms.reconnect = false;
 557
 558         if (no_cached_open)
 559                 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
 560                                NULL);
 561         else
 562                 rc = open_shroot(xid, tcon, &fid);
 563
 564         if (rc)
 565                 return;
 566
 567         SMB3_request_interfaces(xid, tcon);
 568
 569         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 570                         FS_ATTRIBUTE_INFORMATION);
 571         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 572                         FS_DEVICE_INFORMATION);
 573         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 574                         FS_VOLUME_INFORMATION);
 575         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 576                         FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
 577         if (no_cached_open)
 578                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 579         else
 580                 close_shroot(&tcon->crfid);
 581
 582         return;
 583 }
 584
 585 static void
 586 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
 587 {
 588         int rc;
 589         __le16 srch_path = 0; /* Null - open root of share */
 590         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 591         struct cifs_open_parms oparms;
 592         struct cifs_fid fid;
 593
 594         oparms.tcon = tcon;
 595         oparms.desired_access = FILE_READ_ATTRIBUTES;
 596         oparms.disposition = FILE_OPEN;
 597         oparms.create_options = 0;
 598         oparms.fid = &fid;
 599         oparms.reconnect = false;
 600
 601         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, NULL);
 602         if (rc)
 603                 return;
 604
 605         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 606                         FS_ATTRIBUTE_INFORMATION);
 607         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 608                         FS_DEVICE_INFORMATION);
 609         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 610         return;
 611 }
 612
 613 static int
 614 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
 615                         struct cifs_sb_info *cifs_sb, const char *full_path)
 616 {
 617         int rc;
 618         __le16 *utf16_path;
 619         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 620         struct cifs_open_parms oparms;
 621         struct cifs_fid fid;
 622
 623         if ((*full_path == 0) && tcon->crfid.is_valid)
 624                 return 0;
 625
 626         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
 627         if (!utf16_path)
 628                 return -ENOMEM;
 629
 630         oparms.tcon = tcon;
 631         oparms.desired_access = FILE_READ_ATTRIBUTES;
 632         oparms.disposition = FILE_OPEN;
 633         oparms.create_options = 0;
 634         oparms.fid = &fid;
 635         oparms.reconnect = false;
 636
 637         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
 638         if (rc) {
 639                 kfree(utf16_path);
 640                 return rc;
 641         }
 642
 643         rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 644         kfree(utf16_path);
 645         return rc;
 646 }
 647
 648 static int
 649 smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
 650                   struct cifs_sb_info *cifs_sb, const char *full_path,
 651                   u64 *uniqueid, FILE_ALL_INFO *data)
 652 {
 653         *uniqueid = le64_to_cpu(data->IndexNumber);
 654         return 0;
 655 }
 656
 657 static int
 658 smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
 659                      struct cifs_fid *fid, FILE_ALL_INFO *data)
 660 {
 661         int rc;
 662         struct smb2_file_all_info *smb2_data;
 663
 664         smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
 665                             GFP_KERNEL);
 666         if (smb2_data == NULL)
 667                 return -ENOMEM;
 668
 669         rc = SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid,
 670                              smb2_data);
 671         if (!rc)
 672                 move_smb2_info_to_cifs(data, smb2_data);
 673         kfree(smb2_data);
 674         return rc;
 675 }
 676
 677 #ifdef CONFIG_CIFS_XATTR
 678 static ssize_t
 679 move_smb2_ea_to_cifs(char *dst, size_t dst_size,
 680                      struct smb2_file_full_ea_info *src, size_t src_size,
 681                      const unsigned char *ea_name)
 682 {
 683         int rc = 0;
 684         unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0;
 685         char *name, *value;
 686         size_t name_len, value_len, user_name_len;
 687
 688         while (src_size > 0) {
 689                 name = &src->ea_data[0];
 690                 name_len = (size_t)src->ea_name_length;
 691                 value = &src->ea_data[src->ea_name_length + 1];
 692                 value_len = (size_t)le16_to_cpu(src->ea_value_length);
 693
 694                 if (name_len == 0) {
 695                         break;
 696                 }
 697
 698                 if (src_size < 8 + name_len + 1 + value_len) {
 699                         cifs_dbg(FYI, "EA entry goes beyond length of list\n");
 700                         rc = -EIO;
 701                         goto out;
 702                 }
 703
 704                 if (ea_name) {
 705                         if (ea_name_len == name_len &&
 706                             memcmp(ea_name, name, name_len) == 0) {
 707                                 rc = value_len;
 708                                 if (dst_size == 0)
 709                                         goto out;
 710                                 if (dst_size < value_len) {
 711                                         rc = -ERANGE;
 712                                         goto out;
 713                                 }
 714                                 memcpy(dst, value, value_len);
 715                                 goto out;
 716                         }
 717                 } else {
 718                         /* 'user.' plus a terminating null */
 719                         user_name_len = 5 + 1 + name_len;
 720
 721                         rc += user_name_len;
 722
 723                         if (dst_size >= user_name_len) {
 724                                 dst_size -= user_name_len;
 725                                 memcpy(dst, "user.", 5);
 726                                 dst += 5;
 727                                 memcpy(dst, src->ea_data, name_len);
 728                                 dst += name_len;
 729                                 *dst = 0;
 730                                 ++dst;
 731                         } else if (dst_size == 0) {
 732                                 /* skip copy - calc size only */
 733                         } else {
 734                                 /* stop before overrun buffer */
 735                                 rc = -ERANGE;
 736                                 break;
 737                         }
 738                 }
 739
 740                 if (!src->next_entry_offset)
 741                         break;
 742
 743                 if (src_size < le32_to_cpu(src->next_entry_offset)) {
 744                         /* stop before overrun buffer */
 745                         rc = -ERANGE;
 746                         break;
 747                 }
 748                 src_size -= le32_to_cpu(src->next_entry_offset);
 749                 src = (void *)((char *)src +
 750                                le32_to_cpu(src->next_entry_offset));
 751         }
 752
 753         /* didn't find the named attribute */
 754         if (ea_name)
 755                 rc = -ENODATA;
 756
 757 out:
 758         return (ssize_t)rc;
 759 }
 760
 761 static ssize_t
 762 smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon,
 763                const unsigned char *path, const unsigned char *ea_name,
 764                char *ea_data, size_t buf_size,
 765                struct cifs_sb_info *cifs_sb)
 766 {
 767         int rc;
 768         __le16 *utf16_path;
 769         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 770         struct cifs_open_parms oparms;
 771         struct cifs_fid fid;
 772         struct smb2_file_full_ea_info *smb2_data;
 773         int ea_buf_size = SMB2_MIN_EA_BUF;
 774
 775         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
 776         if (!utf16_path)
 777                 return -ENOMEM;
 778
 779         oparms.tcon = tcon;
 780         oparms.desired_access = FILE_READ_EA;
 781         oparms.disposition = FILE_OPEN;
 782         oparms.create_options = 0;
 783         oparms.fid = &fid;
 784         oparms.reconnect = false;
 785
 786         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
 787         kfree(utf16_path);
 788         if (rc) {
 789                 cifs_dbg(FYI, "open failed rc=%d\n", rc);
 790                 return rc;
 791         }
 792
 793         while (1) {
 794                 smb2_data = kzalloc(ea_buf_size, GFP_KERNEL);
 795                 if (smb2_data == NULL) {
 796                         SMB2_close(xid, tcon, fid.persistent_fid,
 797                                    fid.volatile_fid);
 798                         return -ENOMEM;
 799                 }
 800
 801                 rc = SMB2_query_eas(xid, tcon, fid.persistent_fid,
 802                                     fid.volatile_fid,
 803                                     ea_buf_size, smb2_data);
 804
 805                 if (rc != -E2BIG)
 806                         break;
 807
 808                 kfree(smb2_data);
 809                 ea_buf_size <<= 1;
 810
 811                 if (ea_buf_size > SMB2_MAX_EA_BUF) {
 812                         cifs_dbg(VFS, "EA size is too large\n");
 813                         SMB2_close(xid, tcon, fid.persistent_fid,
 814                                    fid.volatile_fid);
 815                         return -ENOMEM;
 816                 }
 817         }
 818
 819         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 820
 821         /*
 822          * If ea_name is NULL (listxattr) and there are no EAs, return 0 as it's
 823          * not an error. Otherwise, the specified ea_name was not found.
 824          */
 825         if (!rc)
 826                 rc = move_smb2_ea_to_cifs(ea_data, buf_size, smb2_data,
 827                                           SMB2_MAX_EA_BUF, ea_name);
 828         else if (!ea_name && rc == -ENODATA)
 829                 rc = 0;
 830
 831         kfree(smb2_data);
 832         return rc;
 833 }
 834
 835
 836 static int
 837 smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
 838             const char *path, const char *ea_name, const void *ea_value,
 839             const __u16 ea_value_len, const struct nls_table *nls_codepage,
 840             struct cifs_sb_info *cifs_sb)
 841 {
 842         int rc;
 843         __le16 *utf16_path;
 844         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 845         struct cifs_open_parms oparms;
 846         struct cifs_fid fid;
 847         struct smb2_file_full_ea_info *ea;
 848         int ea_name_len = strlen(ea_name);
 849         int len;
 850
 851         if (ea_name_len > 255)
 852                 return -EINVAL;
 853
 854         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
 855         if (!utf16_path)
 856                 return -ENOMEM;
 857
 858         oparms.tcon = tcon;
 859         oparms.desired_access = FILE_WRITE_EA;
 860         oparms.disposition = FILE_OPEN;
 861         oparms.create_options = 0;
 862         oparms.fid = &fid;
 863         oparms.reconnect = false;
 864
 865         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
 866         kfree(utf16_path);
 867         if (rc) {
 868                 cifs_dbg(FYI, "open failed rc=%d\n", rc);
 869                 return rc;
 870         }
 871
 872         len = sizeof(ea) + ea_name_len + ea_value_len + 1;
 873         ea = kzalloc(len, GFP_KERNEL);
 874         if (ea == NULL) {
 875                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 876                 return -ENOMEM;
 877         }
 878
 879         ea->ea_name_length = ea_name_len;
 880         ea->ea_value_length = cpu_to_le16(ea_value_len);
 881         memcpy(ea->ea_data, ea_name, ea_name_len + 1);
 882         memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len);
 883
 884         rc = SMB2_set_ea(xid, tcon, fid.persistent_fid, fid.volatile_fid, ea,
 885                          len);
 886         kfree(ea);
 887
 888         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 889
 890         return rc;
 891 }
 892 #endif
 893
 894 static bool
 895 smb2_can_echo(struct TCP_Server_Info *server)
 896 {
 897         return server->echoes;
 898 }
 899
 900 static void
 901 smb2_clear_stats(struct cifs_tcon *tcon)
 902 {
 903         int i;
 904         for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
 905                 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
 906                 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
 907         }
 908 }
 909
 910 static void
 911 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
 912 {
 913         seq_puts(m, "\n\tShare Capabilities:");
 914         if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
 915                 seq_puts(m, " DFS,");
 916         if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
 917                 seq_puts(m, " CONTINUOUS AVAILABILITY,");
 918         if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
 919                 seq_puts(m, " SCALEOUT,");
 920         if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
 921                 seq_puts(m, " CLUSTER,");
 922         if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
 923                 seq_puts(m, " ASYMMETRIC,");
 924         if (tcon->capabilities == 0)
 925                 seq_puts(m, " None");
 926         if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
 927                 seq_puts(m, " Aligned,");
 928         if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
 929                 seq_puts(m, " Partition Aligned,");
 930         if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
 931                 seq_puts(m, " SSD,");
 932         if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
 933                 seq_puts(m, " TRIM-support,");
 934
 935         seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
 936         seq_printf(m, "\n\ttid: 0x%x", tcon->tid);
 937         if (tcon->perf_sector_size)
 938                 seq_printf(m, "\tOptimal sector size: 0x%x",
 939                            tcon->perf_sector_size);
 940         seq_printf(m, "\tMaximal Access: 0x%x", tcon->maximal_access);
 941 }
 942
 943 static void
 944 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
 945 {
 946         atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
 947         atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
 948
 949         /*
 950          *  Can't display SMB2_NEGOTIATE, SESSION_SETUP, LOGOFF, CANCEL and ECHO
 951          *  totals (requests sent) since those SMBs are per-session not per tcon
 952          */
 953         seq_printf(m, "\nBytes read: %llu  Bytes written: %llu",
 954                    (long long)(tcon->bytes_read),
 955                    (long long)(tcon->bytes_written));
 956         seq_printf(m, "\nTreeConnects: %d total %d failed",
 957                    atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
 958                    atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
 959         seq_printf(m, "\nTreeDisconnects: %d total %d failed",
 960                    atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
 961                    atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
 962         seq_printf(m, "\nCreates: %d total %d failed",
 963                    atomic_read(&sent[SMB2_CREATE_HE]),
 964                    atomic_read(&failed[SMB2_CREATE_HE]));
 965         seq_printf(m, "\nCloses: %d total %d failed",
 966                    atomic_read(&sent[SMB2_CLOSE_HE]),
 967                    atomic_read(&failed[SMB2_CLOSE_HE]));
 968         seq_printf(m, "\nFlushes: %d total %d failed",
 969                    atomic_read(&sent[SMB2_FLUSH_HE]),
 970                    atomic_read(&failed[SMB2_FLUSH_HE]));
 971         seq_printf(m, "\nReads: %d total %d failed",
 972                    atomic_read(&sent[SMB2_READ_HE]),
 973                    atomic_read(&failed[SMB2_READ_HE]));
 974         seq_printf(m, "\nWrites: %d total %d failed",
 975                    atomic_read(&sent[SMB2_WRITE_HE]),
 976                    atomic_read(&failed[SMB2_WRITE_HE]));
 977         seq_printf(m, "\nLocks: %d total %d failed",
 978                    atomic_read(&sent[SMB2_LOCK_HE]),
 979                    atomic_read(&failed[SMB2_LOCK_HE]));
 980         seq_printf(m, "\nIOCTLs: %d total %d failed",
 981                    atomic_read(&sent[SMB2_IOCTL_HE]),
 982                    atomic_read(&failed[SMB2_IOCTL_HE]));
 983         seq_printf(m, "\nQueryDirectories: %d total %d failed",
 984                    atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
 985                    atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
 986         seq_printf(m, "\nChangeNotifies: %d total %d failed",
 987                    atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
 988                    atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
 989         seq_printf(m, "\nQueryInfos: %d total %d failed",
 990                    atomic_read(&sent[SMB2_QUERY_INFO_HE]),
 991                    atomic_read(&failed[SMB2_QUERY_INFO_HE]));
 992         seq_printf(m, "\nSetInfos: %d total %d failed",
 993                    atomic_read(&sent[SMB2_SET_INFO_HE]),
 994                    atomic_read(&failed[SMB2_SET_INFO_HE]));
 995         seq_printf(m, "\nOplockBreaks: %d sent %d failed",
 996                    atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
 997                    atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
 998 }
 999
1000 static void
1001 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
1002 {
1003         struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
1004         struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
1005
1006         cfile->fid.persistent_fid = fid->persistent_fid;
1007         cfile->fid.volatile_fid = fid->volatile_fid;
1008         server->ops->set_oplock_level(cinode, oplock, fid->epoch,
1009                                       &fid->purge_cache);
1010         cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
1011         memcpy(cfile->fid.create_guid, fid->create_guid, 16);
1012 }
1013
1014 static void
1015 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
1016                 struct cifs_fid *fid)
1017 {
1018         SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1019 }
1020
1021 static int
1022 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
1023                      u64 persistent_fid, u64 volatile_fid,
1024                      struct copychunk_ioctl *pcchunk)
1025 {
1026         int rc;
1027         unsigned int ret_data_len;
1028         struct resume_key_req *res_key;
1029
1030         rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
1031                         FSCTL_SRV_REQUEST_RESUME_KEY, true /* is_fsctl */,
1032                         NULL, 0 /* no input */,
1033                         (char **)&res_key, &ret_data_len);
1034
1035         if (rc) {
1036                 cifs_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
1037                 goto req_res_key_exit;
1038         }
1039         if (ret_data_len < sizeof(struct resume_key_req)) {
1040                 cifs_dbg(VFS, "Invalid refcopy resume key length\n");
1041                 rc = -EINVAL;
1042                 goto req_res_key_exit;
1043         }
1044         memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
1045
1046 req_res_key_exit:
1047         kfree(res_key);
1048         return rc;
1049 }
1050
1051 static ssize_t
1052 smb2_copychunk_range(const unsigned int xid,
1053                         struct cifsFileInfo *srcfile,
1054                         struct cifsFileInfo *trgtfile, u64 src_off,
1055                         u64 len, u64 dest_off)
1056 {
1057         int rc;
1058         unsigned int ret_data_len;
1059         struct copychunk_ioctl *pcchunk;
1060         struct copychunk_ioctl_rsp *retbuf = NULL;
1061         struct cifs_tcon *tcon;
1062         int chunks_copied = 0;
1063         bool chunk_sizes_updated = false;
1064         ssize_t bytes_written, total_bytes_written = 0;
1065
1066         pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
1067
1068         if (pcchunk == NULL)
1069                 return -ENOMEM;
1070
1071         cifs_dbg(FYI, "in smb2_copychunk_range - about to call request res key\n");
1072         /* Request a key from the server to identify the source of the copy */
1073         rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
1074                                 srcfile->fid.persistent_fid,
1075                                 srcfile->fid.volatile_fid, pcchunk);
1076
1077         /* Note: request_res_key sets res_key null only if rc !=0 */
1078         if (rc)
1079                 goto cchunk_out;
1080
1081         /* For now array only one chunk long, will make more flexible later */
1082         pcchunk->ChunkCount = cpu_to_le32(1);
1083         pcchunk->Reserved = 0;
1084         pcchunk->Reserved2 = 0;
1085
1086         tcon = tlink_tcon(trgtfile->tlink);
1087
1088         while (len > 0) {
1089                 pcchunk->SourceOffset = cpu_to_le64(src_off);
1090                 pcchunk->TargetOffset = cpu_to_le64(dest_off);
1091                 pcchunk->Length =
1092                         cpu_to_le32(min_t(u32, len, tcon->max_bytes_chunk));
1093
1094                 /* Request server copy to target from src identified by key */
1095                 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1096                         trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
1097                         true /* is_fsctl */, (char *)pcchunk,
1098                         sizeof(struct copychunk_ioctl), (char **)&retbuf,
1099                         &ret_data_len);
1100                 if (rc == 0) {
1101                         if (ret_data_len !=
1102                                         sizeof(struct copychunk_ioctl_rsp)) {
1103                                 cifs_dbg(VFS, "invalid cchunk response size\n");
1104                                 rc = -EIO;
1105                                 goto cchunk_out;
1106                         }
1107                         if (retbuf->TotalBytesWritten == 0) {
1108                                 cifs_dbg(FYI, "no bytes copied\n");
1109                                 rc = -EIO;
1110                                 goto cchunk_out;
1111                         }
1112                         /*
1113                          * Check if server claimed to write more than we asked
1114                          */
1115                         if (le32_to_cpu(retbuf->TotalBytesWritten) >
1116                             le32_to_cpu(pcchunk->Length)) {
1117                                 cifs_dbg(VFS, "invalid copy chunk response\n");
1118                                 rc = -EIO;
1119                                 goto cchunk_out;
1120                         }
1121                         if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
1122                                 cifs_dbg(VFS, "invalid num chunks written\n");
1123                                 rc = -EIO;
1124                                 goto cchunk_out;
1125                         }
1126                         chunks_copied++;
1127
1128                         bytes_written = le32_to_cpu(retbuf->TotalBytesWritten);
1129                         src_off += bytes_written;
1130                         dest_off += bytes_written;
1131                         len -= bytes_written;
1132                         total_bytes_written += bytes_written;
1133
1134                         cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n",
1135                                 le32_to_cpu(retbuf->ChunksWritten),
1136                                 le32_to_cpu(retbuf->ChunkBytesWritten),
1137                                 bytes_written);
1138                 } else if (rc == -EINVAL) {
1139                         if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
1140                                 goto cchunk_out;
1141
1142                         cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
1143                                 le32_to_cpu(retbuf->ChunksWritten),
1144                                 le32_to_cpu(retbuf->ChunkBytesWritten),
1145                                 le32_to_cpu(retbuf->TotalBytesWritten));
1146
1147                         /*
1148                          * Check if this is the first request using these sizes,
1149                          * (ie check if copy succeed once with original sizes
1150                          * and check if the server gave us different sizes after
1151                          * we already updated max sizes on previous request).
1152                          * if not then why is the server returning an error now
1153                          */
1154                         if ((chunks_copied != 0) || chunk_sizes_updated)
1155                                 goto cchunk_out;
1156
1157                         /* Check that server is not asking us to grow size */
1158                         if (le32_to_cpu(retbuf->ChunkBytesWritten) <
1159                                         tcon->max_bytes_chunk)
1160                                 tcon->max_bytes_chunk =
1161                                         le32_to_cpu(retbuf->ChunkBytesWritten);
1162                         else
1163                                 goto cchunk_out; /* server gave us bogus size */
1164
1165                         /* No need to change MaxChunks since already set to 1 */
1166                         chunk_sizes_updated = true;
1167                 } else
1168                         goto cchunk_out;
1169         }
1170
1171 cchunk_out:
1172         kfree(pcchunk);
1173         kfree(retbuf);
1174         if (rc)
1175                 return rc;
1176         else
1177                 return total_bytes_written;
1178 }
1179
1180 static int
1181 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
1182                 struct cifs_fid *fid)
1183 {
1184         return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1185 }
1186
1187 static unsigned int
1188 smb2_read_data_offset(char *buf)
1189 {
1190         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1191         return rsp->DataOffset;
1192 }
1193
1194 static unsigned int
1195 smb2_read_data_length(char *buf, bool in_remaining)
1196 {
1197         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1198
1199         if (in_remaining)
1200                 return le32_to_cpu(rsp->DataRemaining);
1201
1202         return le32_to_cpu(rsp->DataLength);
1203 }
1204
1205
1206 static int
1207 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,
1208                struct cifs_io_parms *parms, unsigned int *bytes_read,
1209                char **buf, int *buf_type)
1210 {
1211         parms->persistent_fid = pfid->persistent_fid;
1212         parms->volatile_fid = pfid->volatile_fid;
1213         return SMB2_read(xid, parms, bytes_read, buf, buf_type);
1214 }
1215
1216 static int
1217 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,
1218                 struct cifs_io_parms *parms, unsigned int *written,
1219                 struct kvec *iov, unsigned long nr_segs)
1220 {
1221
1222         parms->persistent_fid = pfid->persistent_fid;
1223         parms->volatile_fid = pfid->volatile_fid;
1224         return SMB2_write(xid, parms, written, iov, nr_segs);
1225 }
1226
1227 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
1228 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
1229                 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
1230 {
1231         struct cifsInodeInfo *cifsi;
1232         int rc;
1233
1234         cifsi = CIFS_I(inode);
1235
1236         /* if file already sparse don't bother setting sparse again */
1237         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
1238                 return true; /* already sparse */
1239
1240         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
1241                 return true; /* already not sparse */
1242
1243         /*
1244          * Can't check for sparse support on share the usual way via the
1245          * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
1246          * since Samba server doesn't set the flag on the share, yet
1247          * supports the set sparse FSCTL and returns sparse correctly
1248          * in the file attributes. If we fail setting sparse though we
1249          * mark that server does not support sparse files for this share
1250          * to avoid repeatedly sending the unsupported fsctl to server
1251          * if the file is repeatedly extended.
1252          */
1253         if (tcon->broken_sparse_sup)
1254                 return false;
1255
1256         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1257                         cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
1258                         true /* is_fctl */,
1259                         &setsparse, 1, NULL, NULL);
1260         if (rc) {
1261                 tcon->broken_sparse_sup = true;
1262                 cifs_dbg(FYI, "set sparse rc = %d\n", rc);
1263                 return false;
1264         }
1265
1266         if (setsparse)
1267                 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
1268         else
1269                 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
1270
1271         return true;
1272 }
1273
1274 static int
1275 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
1276                    struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
1277 {
1278         __le64 eof = cpu_to_le64(size);
1279         struct inode *inode;
1280
1281         /*
1282          * If extending file more than one page make sparse. Many Linux fs
1283          * make files sparse by default when extending via ftruncate
1284          */
1285         inode = d_inode(cfile->dentry);
1286
1287         if (!set_alloc && (size > inode->i_size + 8192)) {
1288                 __u8 set_sparse = 1;
1289
1290                 /* whether set sparse succeeds or not, extend the file */
1291                 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
1292         }
1293
1294         return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
1295                             cfile->fid.volatile_fid, cfile->pid, &eof, false);
1296 }
1297
1298 static int
1299 smb2_duplicate_extents(const unsigned int xid,
1300                         struct cifsFileInfo *srcfile,
1301                         struct cifsFileInfo *trgtfile, u64 src_off,
1302                         u64 len, u64 dest_off)
1303 {
1304         int rc;
1305         unsigned int ret_data_len;
1306         struct duplicate_extents_to_file dup_ext_buf;
1307         struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink);
1308
1309         /* server fileays advertise duplicate extent support with this flag */
1310         if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) &
1311              FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0)
1312                 return -EOPNOTSUPP;
1313
1314         dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid;
1315         dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid;
1316         dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off);
1317         dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off);
1318         dup_ext_buf.ByteCount = cpu_to_le64(len);
1319         cifs_dbg(FYI, "duplicate extents: src off %lld dst off %lld len %lld",
1320                 src_off, dest_off, len);
1321
1322         rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false);
1323         if (rc)
1324                 goto duplicate_extents_out;
1325
1326         rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1327                         trgtfile->fid.volatile_fid,
1328                         FSCTL_DUPLICATE_EXTENTS_TO_FILE,
1329                         true /* is_fsctl */,
1330                         (char *)&dup_ext_buf,
1331                         sizeof(struct duplicate_extents_to_file),
1332                         NULL,
1333                         &ret_data_len);
1334
1335         if (ret_data_len > 0)
1336                 cifs_dbg(FYI, "non-zero response length in duplicate extents");
1337
1338 duplicate_extents_out:
1339         return rc;
1340 }
1341
1342 static int
1343 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
1344                    struct cifsFileInfo *cfile)
1345 {
1346         return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
1347                             cfile->fid.volatile_fid);
1348 }
1349
1350 static int
1351 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
1352                    struct cifsFileInfo *cfile)
1353 {
1354         struct fsctl_set_integrity_information_req integr_info;
1355         unsigned int ret_data_len;
1356
1357         integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED);
1358         integr_info.Flags = 0;
1359         integr_info.Reserved = 0;
1360
1361         return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1362                         cfile->fid.volatile_fid,
1363                         FSCTL_SET_INTEGRITY_INFORMATION,
1364                         true /* is_fsctl */,
1365                         (char *)&integr_info,
1366                         sizeof(struct fsctl_set_integrity_information_req),
1367                         NULL,
1368                         &ret_data_len);
1369
1370 }
1371
1372 static int
1373 smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon,
1374                    struct cifsFileInfo *cfile, void __user *ioc_buf)
1375 {
1376         char *retbuf = NULL;
1377         unsigned int ret_data_len = 0;
1378         int rc;
1379         struct smb_snapshot_array snapshot_in;
1380
1381         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1382                         cfile->fid.volatile_fid,
1383                         FSCTL_SRV_ENUMERATE_SNAPSHOTS,
1384                         true /* is_fsctl */,
1385                         NULL, 0 /* no input data */,
1386                         (char **)&retbuf,
1387                         &ret_data_len);
1388         cifs_dbg(FYI, "enum snaphots ioctl returned %d and ret buflen is %d\n",
1389                         rc, ret_data_len);
1390         if (rc)
1391                 return rc;
1392
1393         if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) {
1394                 /* Fixup buffer */
1395                 if (copy_from_user(&snapshot_in, ioc_buf,
1396                     sizeof(struct smb_snapshot_array))) {
1397                         rc = -EFAULT;
1398                         kfree(retbuf);
1399                         return rc;
1400                 }
1401                 if (snapshot_in.snapshot_array_size < sizeof(struct smb_snapshot_array)) {
1402                         rc = -ERANGE;
1403                         kfree(retbuf);
1404                         return rc;
1405                 }
1406
1407                 if (ret_data_len > snapshot_in.snapshot_array_size)
1408                         ret_data_len = snapshot_in.snapshot_array_size;
1409
1410                 if (copy_to_user(ioc_buf, retbuf, ret_data_len))
1411                         rc = -EFAULT;
1412         }
1413
1414         kfree(retbuf);
1415         return rc;
1416 }
1417
1418 static int
1419 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
1420                      const char *path, struct cifs_sb_info *cifs_sb,
1421                      struct cifs_fid *fid, __u16 search_flags,
1422                      struct cifs_search_info *srch_inf)
1423 {
1424         __le16 *utf16_path;
1425         int rc;
1426         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1427         struct cifs_open_parms oparms;
1428
1429         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1430         if (!utf16_path)
1431                 return -ENOMEM;
1432
1433         oparms.tcon = tcon;
1434         oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
1435         oparms.disposition = FILE_OPEN;
1436         oparms.create_options = 0;
1437         oparms.fid = fid;
1438         oparms.reconnect = false;
1439
1440         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
1441         kfree(utf16_path);
1442         if (rc) {
1443                 cifs_dbg(FYI, "open dir failed rc=%d\n", rc);
1444                 return rc;
1445         }
1446
1447         srch_inf->entries_in_buffer = 0;
1448         srch_inf->index_of_last_entry = 0;
1449
1450         rc = SMB2_query_directory(xid, tcon, fid->persistent_fid,
1451                                   fid->volatile_fid, 0, srch_inf);
1452         if (rc) {
1453                 cifs_dbg(FYI, "query directory failed rc=%d\n", rc);
1454                 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1455         }
1456         return rc;
1457 }
1458
1459 static int
1460 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
1461                     struct cifs_fid *fid, __u16 search_flags,
1462                     struct cifs_search_info *srch_inf)
1463 {
1464         return SMB2_query_directory(xid, tcon, fid->persistent_fid,
1465                                     fid->volatile_fid, 0, srch_inf);
1466 }
1467
1468 static int
1469 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
1470                struct cifs_fid *fid)
1471 {
1472         return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1473 }
1474
1475 /*
1476 * If we negotiate SMB2 protocol and get STATUS_PENDING - update
1477 * the number of credits and return true. Otherwise - return false.
1478 */
1479 static bool
1480 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server, int length)
1481 {
1482         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
1483
1484         if (shdr->Status != STATUS_PENDING)
1485                 return false;
1486
1487         if (!length) {
1488                 spin_lock(&server->req_lock);
1489                 server->credits += le16_to_cpu(shdr->CreditRequest);
1490                 spin_unlock(&server->req_lock);
1491                 wake_up(&server->request_q);
1492         }
1493
1494         return true;
1495 }
1496
1497 static bool
1498 smb2_is_session_expired(char *buf)
1499 {
1500         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
1501
1502         if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED &&
1503             shdr->Status != STATUS_USER_SESSION_DELETED)
1504                 return false;
1505
1506         trace_smb3_ses_expired(shdr->TreeId, shdr->SessionId,
1507                                le16_to_cpu(shdr->Command),
1508                                le64_to_cpu(shdr->MessageId));
1509         cifs_dbg(FYI, "Session expired or deleted\n");
1510
1511         return true;
1512 }
1513
1514 static int
1515 smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
1516                      struct cifsInodeInfo *cinode)
1517 {
1518         if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
1519                 return SMB2_lease_break(0, tcon, cinode->lease_key,
1520                                         smb2_get_lease_state(cinode));
1521
1522         return SMB2_oplock_break(0, tcon, fid->persistent_fid,
1523                                  fid->volatile_fid,
1524                                  CIFS_CACHE_READ(cinode) ? 1 : 0);
1525 }
1526
1527 static int
1528 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
1529              struct kstatfs *buf)
1530 {
1531         int rc;
1532         __le16 srch_path = 0; /* Null - open root of share */
1533         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1534         struct cifs_open_parms oparms;
1535         struct cifs_fid fid;
1536
1537         oparms.tcon = tcon;
1538         oparms.desired_access = FILE_READ_ATTRIBUTES;
1539         oparms.disposition = FILE_OPEN;
1540         oparms.create_options = 0;
1541         oparms.fid = &fid;
1542         oparms.reconnect = false;
1543
1544         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, NULL);
1545         if (rc)
1546                 return rc;
1547         buf->f_type = SMB2_MAGIC_NUMBER;
1548         rc = SMB2_QFS_info(xid, tcon, fid.persistent_fid, fid.volatile_fid,
1549                            buf);
1550         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
1551         return rc;
1552 }
1553
1554 static int
1555 smb311_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
1556              struct kstatfs *buf)
1557 {
1558         int rc;
1559         __le16 srch_path = 0; /* Null - open root of share */
1560         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1561         struct cifs_open_parms oparms;
1562         struct cifs_fid fid;
1563
1564         if (!tcon->posix_extensions)
1565                 return smb2_queryfs(xid, tcon, buf);
1566
1567         oparms.tcon = tcon;
1568         oparms.desired_access = FILE_READ_ATTRIBUTES;
1569         oparms.disposition = FILE_OPEN;
1570         oparms.create_options = 0;
1571         oparms.fid = &fid;
1572         oparms.reconnect = false;
1573
1574         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, NULL);
1575         if (rc)
1576                 return rc;
1577
1578         rc = SMB311_posix_qfs_info(xid, tcon, fid.persistent_fid,
1579                                    fid.volatile_fid, buf);
1580         buf->f_type = SMB2_MAGIC_NUMBER;
1581         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
1582         return rc;
1583 }
1584
1585 static bool
1586 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
1587 {
1588         return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
1589                ob1->fid.volatile_fid == ob2->fid.volatile_fid;
1590 }
1591
1592 static int
1593 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
1594                __u64 length, __u32 type, int lock, int unlock, bool wait)
1595 {
1596         if (unlock && !lock)
1597                 type = SMB2_LOCKFLAG_UNLOCK;
1598         return SMB2_lock(xid, tlink_tcon(cfile->tlink),
1599                          cfile->fid.persistent_fid, cfile->fid.volatile_fid,
1600                          current->tgid, length, offset, type, wait);
1601 }
1602
1603 static void
1604 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
1605 {
1606         memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
1607 }
1608
1609 static void
1610 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
1611 {
1612         memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
1613 }
1614
1615 static void
1616 smb2_new_lease_key(struct cifs_fid *fid)
1617 {
1618         generate_random_uuid(fid->lease_key);
1619 }
1620
1621 static int
1622 smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,
1623                    const char *search_name,
1624                    struct dfs_info3_param **target_nodes,
1625                    unsigned int *num_of_nodes,
1626                    const struct nls_table *nls_codepage, int remap)
1627 {
1628         int rc;
1629         __le16 *utf16_path = NULL;
1630         int utf16_path_len = 0;
1631         struct cifs_tcon *tcon;
1632         struct fsctl_get_dfs_referral_req *dfs_req = NULL;
1633         struct get_dfs_referral_rsp *dfs_rsp = NULL;
1634         u32 dfs_req_size = 0, dfs_rsp_size = 0;
1635
1636         cifs_dbg(FYI, "smb2_get_dfs_refer path <%s>\n", search_name);
1637
1638         /*
1639          * Try to use the IPC tcon, otherwise just use any
1640          */
1641         tcon = ses->tcon_ipc;
1642         if (tcon == NULL) {
1643                 spin_lock(&cifs_tcp_ses_lock);
1644                 tcon = list_first_entry_or_null(&ses->tcon_list,
1645                                                 struct cifs_tcon,
1646                                                 tcon_list);
1647                 if (tcon)
1648                         tcon->tc_count++;
1649                 spin_unlock(&cifs_tcp_ses_lock);
1650         }
1651
1652         if (tcon == NULL) {
1653                 cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n",
1654                          ses);
1655                 rc = -ENOTCONN;
1656                 goto out;
1657         }
1658
1659         utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX,
1660                                            &utf16_path_len,
1661                                            nls_codepage, remap);
1662         if (!utf16_path) {
1663                 rc = -ENOMEM;
1664                 goto out;
1665         }
1666
1667         dfs_req_size = sizeof(*dfs_req) + utf16_path_len;
1668         dfs_req = kzalloc(dfs_req_size, GFP_KERNEL);
1669         if (!dfs_req) {
1670                 rc = -ENOMEM;
1671                 goto out;
1672         }
1673
1674         /* Highest DFS referral version understood */
1675         dfs_req->MaxReferralLevel = DFS_VERSION;
1676
1677         /* Path to resolve in an UTF-16 null-terminated string */
1678         memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len);
1679
1680         do {
1681                 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
1682                                 FSCTL_DFS_GET_REFERRALS,
1683                                 true /* is_fsctl */,
1684                                 (char *)dfs_req, dfs_req_size,
1685                                 (char **)&dfs_rsp, &dfs_rsp_size);
1686         } while (rc == -EAGAIN);
1687
1688         if (rc) {
1689                 if ((rc != -ENOENT) && (rc != -EOPNOTSUPP))
1690                         cifs_dbg(VFS, "ioctl error in smb2_get_dfs_refer rc=%d\n", rc);
1691                 goto out;
1692         }
1693
1694         rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size,
1695                                  num_of_nodes, target_nodes,
1696                                  nls_codepage, remap, search_name,
1697                                  true /* is_unicode */);
1698         if (rc) {
1699                 cifs_dbg(VFS, "parse error in smb2_get_dfs_refer rc=%d\n", rc);
1700                 goto out;
1701         }
1702
1703  out:
1704         if (tcon && !tcon->ipc) {
1705                 /* ipc tcons are not refcounted */
1706                 spin_lock(&cifs_tcp_ses_lock);
1707                 tcon->tc_count--;
1708                 spin_unlock(&cifs_tcp_ses_lock);
1709         }
1710         kfree(utf16_path);
1711         kfree(dfs_req);
1712         kfree(dfs_rsp);
1713         return rc;
1714 }
1715 #define SMB2_SYMLINK_STRUCT_SIZE \
1716         (sizeof(struct smb2_err_rsp) - 1 + sizeof(struct smb2_symlink_err_rsp))
1717
1718 static int
1719 smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
1720                    const char *full_path, char **target_path,
1721                    struct cifs_sb_info *cifs_sb)
1722 {
1723         int rc;
1724         __le16 *utf16_path;
1725         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1726         struct cifs_open_parms oparms;
1727         struct cifs_fid fid;
1728         struct kvec err_iov = {NULL, 0};
1729         struct smb2_err_rsp *err_buf = NULL;
1730         int resp_buftype;
1731         struct smb2_symlink_err_rsp *symlink;
1732         unsigned int sub_len;
1733         unsigned int sub_offset;
1734         unsigned int print_len;
1735         unsigned int print_offset;
1736
1737         cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
1738
1739         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
1740         if (!utf16_path)
1741                 return -ENOMEM;
1742
1743         oparms.tcon = tcon;
1744         oparms.desired_access = FILE_READ_ATTRIBUTES;
1745         oparms.disposition = FILE_OPEN;
1746         oparms.create_options = 0;
1747         oparms.fid = &fid;
1748         oparms.reconnect = false;
1749
1750         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, &err_iov,
1751                        &resp_buftype);
1752         if (!rc || !err_iov.iov_base) {
1753                 rc = -ENOENT;
1754                 goto free_path;
1755         }
1756
1757         err_buf = err_iov.iov_base;
1758         if (le32_to_cpu(err_buf->ByteCount) < sizeof(struct smb2_symlink_err_rsp) ||
1759             err_iov.iov_len < SMB2_SYMLINK_STRUCT_SIZE) {
1760                 rc = -ENOENT;
1761                 goto querty_exit;
1762         }
1763
1764         /* open must fail on symlink - reset rc */
1765         rc = 0;
1766         symlink = (struct smb2_symlink_err_rsp *)err_buf->ErrorData;
1767         sub_len = le16_to_cpu(symlink->SubstituteNameLength);
1768         sub_offset = le16_to_cpu(symlink->SubstituteNameOffset);
1769         print_len = le16_to_cpu(symlink->PrintNameLength);
1770         print_offset = le16_to_cpu(symlink->PrintNameOffset);
1771
1772         if (err_iov.iov_len < SMB2_SYMLINK_STRUCT_SIZE + sub_offset + sub_len) {
1773                 rc = -ENOENT;
1774                 goto querty_exit;
1775         }
1776
1777         if (err_iov.iov_len <
1778             SMB2_SYMLINK_STRUCT_SIZE + print_offset + print_len) {
1779                 rc = -ENOENT;
1780                 goto querty_exit;
1781         }
1782
1783         *target_path = cifs_strndup_from_utf16(
1784                                 (char *)symlink->PathBuffer + sub_offset,
1785                                 sub_len, true, cifs_sb->local_nls);
1786         if (!(*target_path)) {
1787                 rc = -ENOMEM;
1788                 goto querty_exit;
1789         }
1790         convert_delimiter(*target_path, '/');
1791         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
1792
1793  querty_exit:
1794         free_rsp_buf(resp_buftype, err_buf);
1795  free_path:
1796         kfree(utf16_path);
1797         return rc;
1798 }
1799
1800 #ifdef CONFIG_CIFS_ACL
1801 static struct cifs_ntsd *
1802 get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb,
1803                 const struct cifs_fid *cifsfid, u32 *pacllen)
1804 {
1805         struct cifs_ntsd *pntsd = NULL;
1806         unsigned int xid;
1807         int rc = -EOPNOTSUPP;
1808         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
1809
1810         if (IS_ERR(tlink))
1811                 return ERR_CAST(tlink);
1812
1813         xid = get_xid();
1814         cifs_dbg(FYI, "trying to get acl\n");
1815
1816         rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid,
1817                             cifsfid->volatile_fid, (void **)&pntsd, pacllen);
1818         free_xid(xid);
1819
1820         cifs_put_tlink(tlink);
1821
1822         cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
1823         if (rc)
1824                 return ERR_PTR(rc);
1825         return pntsd;
1826
1827 }
1828
1829 static struct cifs_ntsd *
1830 get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb,
1831                 const char *path, u32 *pacllen)
1832 {
1833         struct cifs_ntsd *pntsd = NULL;
1834         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1835         unsigned int xid;
1836         int rc;
1837         struct cifs_tcon *tcon;
1838         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
1839         struct cifs_fid fid;
1840         struct cifs_open_parms oparms;
1841         __le16 *utf16_path;
1842
1843         cifs_dbg(FYI, "get smb3 acl for path %s\n", path);
1844         if (IS_ERR(tlink))
1845                 return ERR_CAST(tlink);
1846
1847         tcon = tlink_tcon(tlink);
1848         xid = get_xid();
1849
1850         if (backup_cred(cifs_sb))
1851                 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
1852         else
1853                 oparms.create_options = 0;
1854
1855         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1856         if (!utf16_path) {
1857                 rc = -ENOMEM;
1858                 free_xid(xid);
1859                 return ERR_PTR(rc);
1860         }
1861
1862         oparms.tcon = tcon;
1863         oparms.desired_access = READ_CONTROL;
1864         oparms.disposition = FILE_OPEN;
1865         oparms.fid = &fid;
1866         oparms.reconnect = false;
1867
1868         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
1869         kfree(utf16_path);
1870         if (!rc) {
1871                 rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
1872                             fid.volatile_fid, (void **)&pntsd, pacllen);
1873                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
1874         }
1875
1876         cifs_put_tlink(tlink);
1877         free_xid(xid);
1878
1879         cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
1880         if (rc)
1881                 return ERR_PTR(rc);
1882         return pntsd;
1883 }
1884
1885 #ifdef CONFIG_CIFS_ACL
1886 static int
1887 set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen,
1888                 struct inode *inode, const char *path, int aclflag)
1889 {
1890         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1891         unsigned int xid;
1892         int rc, access_flags = 0;
1893         struct cifs_tcon *tcon;
1894         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1895         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
1896         struct cifs_fid fid;
1897         struct cifs_open_parms oparms;
1898         __le16 *utf16_path;
1899
1900         cifs_dbg(FYI, "set smb3 acl for path %s\n", path);
1901         if (IS_ERR(tlink))
1902                 return PTR_ERR(tlink);
1903
1904         tcon = tlink_tcon(tlink);
1905         xid = get_xid();
1906
1907         if (backup_cred(cifs_sb))
1908                 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
1909         else
1910                 oparms.create_options = 0;
1911
1912         if (aclflag == CIFS_ACL_OWNER || aclflag == CIFS_ACL_GROUP)
1913                 access_flags = WRITE_OWNER;
1914         else
1915                 access_flags = WRITE_DAC;
1916
1917         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1918         if (!utf16_path) {
1919                 rc = -ENOMEM;
1920                 free_xid(xid);
1921                 return rc;
1922         }
1923
1924         oparms.tcon = tcon;
1925         oparms.desired_access = access_flags;
1926         oparms.disposition = FILE_OPEN;
1927         oparms.path = path;
1928         oparms.fid = &fid;
1929         oparms.reconnect = false;
1930
1931         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
1932         kfree(utf16_path);
1933         if (!rc) {
1934                 rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
1935                             fid.volatile_fid, pnntsd, acllen, aclflag);
1936                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
1937         }
1938
1939         cifs_put_tlink(tlink);
1940         free_xid(xid);
1941         return rc;
1942 }
1943 #endif /* CIFS_ACL */
1944
1945 /* Retrieve an ACL from the server */
1946 static struct cifs_ntsd *
1947 get_smb2_acl(struct cifs_sb_info *cifs_sb,
1948                                       struct inode *inode, const char *path,
1949                                       u32 *pacllen)
1950 {
1951         struct cifs_ntsd *pntsd = NULL;
1952         struct cifsFileInfo *open_file = NULL;
1953
1954         if (inode)
1955                 open_file = find_readable_file(CIFS_I(inode), true);
1956         if (!open_file)
1957                 return get_smb2_acl_by_path(cifs_sb, path, pacllen);
1958
1959         pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen);
1960         cifsFileInfo_put(open_file);
1961         return pntsd;
1962 }
1963 #endif
1964
1965 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
1966                             loff_t offset, loff_t len, bool keep_size)
1967 {
1968         struct inode *inode;
1969         struct cifsInodeInfo *cifsi;
1970         struct cifsFileInfo *cfile = file->private_data;
1971         struct file_zero_data_information fsctl_buf;
1972         long rc;
1973         unsigned int xid;
1974
1975         xid = get_xid();
1976
1977         inode = d_inode(cfile->dentry);
1978         cifsi = CIFS_I(inode);
1979
1980         /* if file not oplocked can't be sure whether asking to extend size */
1981         if (!CIFS_CACHE_READ(cifsi))
1982                 if (keep_size == false) {
1983                         rc = -EOPNOTSUPP;
1984                         free_xid(xid);
1985                         return rc;
1986                 }
1987
1988         /*
1989          * Must check if file sparse since fallocate -z (zero range) assumes
1990          * non-sparse allocation
1991          */
1992         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) {
1993                 rc = -EOPNOTSUPP;
1994                 free_xid(xid);
1995                 return rc;
1996         }
1997
1998         /*
1999          * need to make sure we are not asked to extend the file since the SMB3
2000          * fsctl does not change the file size. In the future we could change
2001          * this to zero the first part of the range then set the file size
2002          * which for a non sparse file would zero the newly extended range
2003          */
2004         if (keep_size == false)
2005                 if (i_size_read(inode) < offset + len) {
2006                         rc = -EOPNOTSUPP;
2007                         free_xid(xid);
2008                         return rc;
2009                 }
2010
2011         cifs_dbg(FYI, "offset %lld len %lld", offset, len);
2012
2013         fsctl_buf.FileOffset = cpu_to_le64(offset);
2014         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
2015
2016         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2017                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
2018                         true /* is_fctl */, (char *)&fsctl_buf,
2019                         sizeof(struct file_zero_data_information), NULL, NULL);
2020         free_xid(xid);
2021         return rc;
2022 }
2023
2024 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
2025                             loff_t offset, loff_t len)
2026 {
2027         struct inode *inode;
2028         struct cifsInodeInfo *cifsi;
2029         struct cifsFileInfo *cfile = file->private_data;
2030         struct file_zero_data_information fsctl_buf;
2031         long rc;
2032         unsigned int xid;
2033         __u8 set_sparse = 1;
2034
2035         xid = get_xid();
2036
2037         inode = d_inode(cfile->dentry);
2038         cifsi = CIFS_I(inode);
2039
2040         /* Need to make file sparse, if not already, before freeing range. */
2041         /* Consider adding equivalent for compressed since it could also work */
2042         if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse)) {
2043                 rc = -EOPNOTSUPP;
2044                 free_xid(xid);
2045                 return rc;
2046         }
2047
2048         cifs_dbg(FYI, "offset %lld len %lld", offset, len);
2049
2050         fsctl_buf.FileOffset = cpu_to_le64(offset);
2051         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
2052
2053         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2054                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
2055                         true /* is_fctl */, (char *)&fsctl_buf,
2056                         sizeof(struct file_zero_data_information), NULL, NULL);
2057         free_xid(xid);
2058         return rc;
2059 }
2060
2061 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
2062                             loff_t off, loff_t len, bool keep_size)
2063 {
2064         struct inode *inode;
2065         struct cifsInodeInfo *cifsi;
2066         struct cifsFileInfo *cfile = file->private_data;
2067         long rc = -EOPNOTSUPP;
2068         unsigned int xid;
2069
2070         xid = get_xid();
2071
2072         inode = d_inode(cfile->dentry);
2073         cifsi = CIFS_I(inode);
2074
2075         /* if file not oplocked can't be sure whether asking to extend size */
2076         if (!CIFS_CACHE_READ(cifsi))
2077                 if (keep_size == false) {
2078                         free_xid(xid);
2079                         return rc;
2080                 }
2081
2082         /*
2083          * Files are non-sparse by default so falloc may be a no-op
2084          * Must check if file sparse. If not sparse, and not extending
2085          * then no need to do anything since file already allocated
2086          */
2087         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
2088                 if (keep_size == true)
2089                         rc = 0;
2090                 /* check if extending file */
2091                 else if (i_size_read(inode) >= off + len)
2092                         /* not extending file and already not sparse */
2093                         rc = 0;
2094                 /* BB: in future add else clause to extend file */
2095                 else
2096                         rc = -EOPNOTSUPP;
2097                 free_xid(xid);
2098                 return rc;
2099         }
2100
2101         if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
2102                 /*
2103                  * Check if falloc starts within first few pages of file
2104                  * and ends within a few pages of the end of file to
2105                  * ensure that most of file is being forced to be
2106                  * fallocated now. If so then setting whole file sparse
2107                  * ie potentially making a few extra pages at the beginning
2108                  * or end of the file non-sparse via set_sparse is harmless.
2109                  */
2110                 if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) {
2111                         rc = -EOPNOTSUPP;
2112                         free_xid(xid);
2113                         return rc;
2114                 }
2115
2116                 rc = smb2_set_sparse(xid, tcon, cfile, inode, false);
2117         }
2118         /* BB: else ... in future add code to extend file and set sparse */
2119
2120
2121         free_xid(xid);
2122         return rc;
2123 }
2124
2125
2126 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
2127                            loff_t off, loff_t len)
2128 {
2129         /* KEEP_SIZE already checked for by do_fallocate */
2130         if (mode & FALLOC_FL_PUNCH_HOLE)
2131                 return smb3_punch_hole(file, tcon, off, len);
2132         else if (mode & FALLOC_FL_ZERO_RANGE) {
2133                 if (mode & FALLOC_FL_KEEP_SIZE)
2134                         return smb3_zero_range(file, tcon, off, len, true);
2135                 return smb3_zero_range(file, tcon, off, len, false);
2136         } else if (mode == FALLOC_FL_KEEP_SIZE)
2137                 return smb3_simple_falloc(file, tcon, off, len, true);
2138         else if (mode == 0)
2139                 return smb3_simple_falloc(file, tcon, off, len, false);
2140
2141         return -EOPNOTSUPP;
2142 }
2143
2144 static void
2145 smb2_downgrade_oplock(struct TCP_Server_Info *server,
2146                         struct cifsInodeInfo *cinode, bool set_level2)
2147 {
2148         if (set_level2)
2149                 server->ops->set_oplock_level(cinode, SMB2_OPLOCK_LEVEL_II,
2150                                                 0, NULL);
2151         else
2152                 server->ops->set_oplock_level(cinode, 0, 0, NULL);
2153 }
2154
2155 static void
2156 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
2157                       unsigned int epoch, bool *purge_cache)
2158 {
2159         oplock &= 0xFF;
2160         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
2161                 return;
2162         if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
2163                 cinode->oplock = CIFS_CACHE_RHW_FLG;
2164                 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
2165                          &cinode->vfs_inode);
2166         } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
2167                 cinode->oplock = CIFS_CACHE_RW_FLG;
2168                 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
2169                          &cinode->vfs_inode);
2170         } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
2171                 cinode->oplock = CIFS_CACHE_READ_FLG;
2172                 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
2173                          &cinode->vfs_inode);
2174         } else
2175                 cinode->oplock = 0;
2176 }
2177
2178 static void
2179 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
2180                        unsigned int epoch, bool *purge_cache)
2181 {
2182         char message[5] = {0};
2183
2184         oplock &= 0xFF;
2185         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
2186                 return;
2187
2188         cinode->oplock = 0;
2189         if (oplock & SMB2_LEASE_READ_CACHING_HE) {
2190                 cinode->oplock |= CIFS_CACHE_READ_FLG;
2191                 strcat(message, "R");
2192         }
2193         if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
2194                 cinode->oplock |= CIFS_CACHE_HANDLE_FLG;
2195                 strcat(message, "H");
2196         }
2197         if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
2198                 cinode->oplock |= CIFS_CACHE_WRITE_FLG;
2199                 strcat(message, "W");
2200         }
2201         if (!cinode->oplock)
2202                 strcat(message, "None");
2203         cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
2204                  &cinode->vfs_inode);
2205 }
2206
2207 static void
2208 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
2209                       unsigned int epoch, bool *purge_cache)
2210 {
2211         unsigned int old_oplock = cinode->oplock;
2212
2213         smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
2214
2215         if (purge_cache) {
2216                 *purge_cache = false;
2217                 if (old_oplock == CIFS_CACHE_READ_FLG) {
2218                         if (cinode->oplock == CIFS_CACHE_READ_FLG &&
2219                             (epoch - cinode->epoch > 0))
2220                                 *purge_cache = true;
2221                         else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
2222                                  (epoch - cinode->epoch > 1))
2223                                 *purge_cache = true;
2224                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
2225                                  (epoch - cinode->epoch > 1))
2226                                 *purge_cache = true;
2227                         else if (cinode->oplock == 0 &&
2228                                  (epoch - cinode->epoch > 0))
2229                                 *purge_cache = true;
2230                 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
2231                         if (cinode->oplock == CIFS_CACHE_RH_FLG &&
2232                             (epoch - cinode->epoch > 0))
2233                                 *purge_cache = true;
2234                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
2235                                  (epoch - cinode->epoch > 1))
2236                                 *purge_cache = true;
2237                 }
2238                 cinode->epoch = epoch;
2239         }
2240 }
2241
2242 static bool
2243 smb2_is_read_op(__u32 oplock)
2244 {
2245         return oplock == SMB2_OPLOCK_LEVEL_II;
2246 }
2247
2248 static bool
2249 smb21_is_read_op(__u32 oplock)
2250 {
2251         return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
2252                !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
2253 }
2254
2255 static __le32
2256 map_oplock_to_lease(u8 oplock)
2257 {
2258         if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
2259                 return SMB2_LEASE_WRITE_CACHING | SMB2_LEASE_READ_CACHING;
2260         else if (oplock == SMB2_OPLOCK_LEVEL_II)
2261                 return SMB2_LEASE_READ_CACHING;
2262         else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
2263                 return SMB2_LEASE_HANDLE_CACHING | SMB2_LEASE_READ_CACHING |
2264                        SMB2_LEASE_WRITE_CACHING;
2265         return 0;
2266 }
2267
2268 static char *
2269 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
2270 {
2271         struct create_lease *buf;
2272
2273         buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
2274         if (!buf)
2275                 return NULL;
2276
2277         memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
2278         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
2279
2280         buf->ccontext.DataOffset = cpu_to_le16(offsetof
2281                                         (struct create_lease, lcontext));
2282         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
2283         buf->ccontext.NameOffset = cpu_to_le16(offsetof
2284                                 (struct create_lease, Name));
2285         buf->ccontext.NameLength = cpu_to_le16(4);
2286         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
2287         buf->Name[0] = 'R';
2288         buf->Name[1] = 'q';
2289         buf->Name[2] = 'L';
2290         buf->Name[3] = 's';
2291         return (char *)buf;
2292 }
2293
2294 static char *
2295 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
2296 {
2297         struct create_lease_v2 *buf;
2298
2299         buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
2300         if (!buf)
2301                 return NULL;
2302
2303         memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
2304         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
2305
2306         buf->ccontext.DataOffset = cpu_to_le16(offsetof
2307                                         (struct create_lease_v2, lcontext));
2308         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
2309         buf->ccontext.NameOffset = cpu_to_le16(offsetof
2310                                 (struct create_lease_v2, Name));
2311         buf->ccontext.NameLength = cpu_to_le16(4);
2312         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
2313         buf->Name[0] = 'R';
2314         buf->Name[1] = 'q';
2315         buf->Name[2] = 'L';
2316         buf->Name[3] = 's';
2317         return (char *)buf;
2318 }
2319
2320 static __u8
2321 smb2_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
2322 {
2323         struct create_lease *lc = (struct create_lease *)buf;
2324
2325         *epoch = 0; /* not used */
2326         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
2327                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
2328         return le32_to_cpu(lc->lcontext.LeaseState);
2329 }
2330
2331 static __u8
2332 smb3_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
2333 {
2334         struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
2335
2336         *epoch = le16_to_cpu(lc->lcontext.Epoch);
2337         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
2338                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
2339         if (lease_key)
2340                 memcpy(lease_key, &lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE);
2341         return le32_to_cpu(lc->lcontext.LeaseState);
2342 }
2343
2344 static unsigned int
2345 smb2_wp_retry_size(struct inode *inode)
2346 {
2347         return min_t(unsigned int, CIFS_SB(inode->i_sb)->wsize,
2348                      SMB2_MAX_BUFFER_SIZE);
2349 }
2350
2351 static bool
2352 smb2_dir_needs_close(struct cifsFileInfo *cfile)
2353 {
2354         return !cfile->invalidHandle;
2355 }
2356
2357 static void
2358 fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len,
2359                    struct smb_rqst *old_rq)
2360 {
2361         struct smb2_sync_hdr *shdr =
2362                         (struct smb2_sync_hdr *)old_rq->rq_iov[0].iov_base;
2363
2364         memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr));
2365         tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
2366         tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
2367         tr_hdr->Flags = cpu_to_le16(0x01);
2368         get_random_bytes(&tr_hdr->Nonce, SMB3_AES128CMM_NONCE);
2369         memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8);
2370 }
2371
2372 /* We can not use the normal sg_set_buf() as we will sometimes pass a
2373  * stack object as buf.
2374  */
2375 static inline void smb2_sg_set_buf(struct scatterlist *sg, const void *buf,
2376                                    unsigned int buflen)
2377 {
2378         sg_set_page(sg, virt_to_page(buf), buflen, offset_in_page(buf));
2379 }
2380
2381 /* Assumes:
2382  * rqst->rq_iov[0]  is transform header
2383  * rqst->rq_iov[1+] data to be encrypted/decrypted
2384  */
2385 static struct scatterlist *
2386 init_sg(struct smb_rqst *rqst, u8 *sign)
2387 {
2388         unsigned int sg_len = rqst->rq_nvec + rqst->rq_npages + 1;
2389         unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20;
2390         struct scatterlist *sg;
2391         unsigned int i;
2392         unsigned int j;
2393
2394         sg = kmalloc_array(sg_len, sizeof(struct scatterlist), GFP_KERNEL);
2395         if (!sg)
2396                 return NULL;
2397
2398         sg_init_table(sg, sg_len);
2399         smb2_sg_set_buf(&sg[0], rqst->rq_iov[0].iov_base + 20, assoc_data_len);
2400         for (i = 1; i < rqst->rq_nvec; i++)
2401                 smb2_sg_set_buf(&sg[i], rqst->rq_iov[i].iov_base,
2402                                                 rqst->rq_iov[i].iov_len);
2403         for (j = 0; i < sg_len - 1; i++, j++) {
2404                 unsigned int len, offset;
2405
2406                 rqst_page_get_length(rqst, j, &len, &offset);
2407                 sg_set_page(&sg[i], rqst->rq_pages[j], len, offset);
2408         }
2409         smb2_sg_set_buf(&sg[sg_len - 1], sign, SMB2_SIGNATURE_SIZE);
2410         return sg;
2411 }
2412
2413 static int
2414 smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key)
2415 {
2416         struct cifs_ses *ses;
2417         u8 *ses_enc_key;
2418
2419         spin_lock(&cifs_tcp_ses_lock);
2420         list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
2421                 if (ses->Suid != ses_id)
2422                         continue;
2423                 ses_enc_key = enc ? ses->smb3encryptionkey :
2424                                                         ses->smb3decryptionkey;
2425                 memcpy(key, ses_enc_key, SMB3_SIGN_KEY_SIZE);
2426                 spin_unlock(&cifs_tcp_ses_lock);
2427                 return 0;
2428         }
2429         spin_unlock(&cifs_tcp_ses_lock);
2430
2431         return 1;
2432 }
2433 /*
2434  * Encrypt or decrypt @rqst message. @rqst[0] has the following format:
2435  * iov[0]   - transform header (associate data),
2436  * iov[1-N] - SMB2 header and pages - data to encrypt.
2437  * On success return encrypted data in iov[1-N] and pages, leave iov[0]
2438  * untouched.
2439  */
2440 static int
2441 crypt_message(struct TCP_Server_Info *server, struct smb_rqst *rqst, int enc)
2442 {
2443         struct smb2_transform_hdr *tr_hdr =
2444                         (struct smb2_transform_hdr *)rqst->rq_iov[0].iov_base;
2445         unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20;
2446         int rc = 0;
2447         struct scatterlist *sg;
2448         u8 sign[SMB2_SIGNATURE_SIZE] = {};
2449         u8 key[SMB3_SIGN_KEY_SIZE];
2450         struct aead_request *req;
2451         char *iv;
2452         unsigned int iv_len;
2453         DECLARE_CRYPTO_WAIT(wait);
2454         struct crypto_aead *tfm;
2455         unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
2456
2457         rc = smb2_get_enc_key(server, tr_hdr->SessionId, enc, key);
2458         if (rc) {
2459                 cifs_dbg(VFS, "%s: Could not get %scryption key\n", __func__,
2460                          enc ? "en" : "de");
2461                 return 0;
2462         }
2463
2464         rc = smb3_crypto_aead_allocate(server);
2465         if (rc) {
2466                 cifs_dbg(VFS, "%s: crypto alloc failed\n", __func__);
2467                 return rc;
2468         }
2469
2470         tfm = enc ? server->secmech.ccmaesencrypt :
2471                                                 server->secmech.ccmaesdecrypt;
2472         rc = crypto_aead_setkey(tfm, key, SMB3_SIGN_KEY_SIZE);
2473         if (rc) {
2474                 cifs_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc);
2475                 return rc;
2476         }
2477
2478         rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE);
2479         if (rc) {
2480                 cifs_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc);
2481                 return rc;
2482         }
2483
2484         req = aead_request_alloc(tfm, GFP_KERNEL);
2485         if (!req) {
2486                 cifs_dbg(VFS, "%s: Failed to alloc aead request", __func__);
2487                 return -ENOMEM;
2488         }
2489
2490         if (!enc) {
2491                 memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE);
2492                 crypt_len += SMB2_SIGNATURE_SIZE;
2493         }
2494
2495         sg = init_sg(rqst, sign);
2496         if (!sg) {
2497                 cifs_dbg(VFS, "%s: Failed to init sg", __func__);
2498                 rc = -ENOMEM;
2499                 goto free_req;
2500         }
2501
2502         iv_len = crypto_aead_ivsize(tfm);
2503         iv = kzalloc(iv_len, GFP_KERNEL);
2504         if (!iv) {
2505                 cifs_dbg(VFS, "%s: Failed to alloc IV", __func__);
2506                 rc = -ENOMEM;
2507                 goto free_sg;
2508         }
2509         iv[0] = 3;
2510         memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES128CMM_NONCE);
2511
2512         aead_request_set_crypt(req, sg, sg, crypt_len, iv);
2513         aead_request_set_ad(req, assoc_data_len);
2514
2515         aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
2516                                   crypto_req_done, &wait);
2517
2518         rc = crypto_wait_req(enc ? crypto_aead_encrypt(req)
2519                                 : crypto_aead_decrypt(req), &wait);
2520
2521         if (!rc && enc)
2522                 memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE);
2523
2524         kfree(iv);
2525 free_sg:
2526         kfree(sg);
2527 free_req:
2528         kfree(req);
2529         return rc;
2530 }
2531
2532 static int
2533 smb3_init_transform_rq(struct TCP_Server_Info *server, struct smb_rqst *new_rq,
2534                        struct smb_rqst *old_rq)
2535 {
2536         struct kvec *iov;
2537         struct page **pages;
2538         struct smb2_transform_hdr *tr_hdr;
2539         unsigned int npages = old_rq->rq_npages;
2540         unsigned int orig_len;
2541         int i;
2542         int rc = -ENOMEM;
2543
2544         pages = kmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
2545         if (!pages)
2546                 return rc;
2547
2548         new_rq->rq_pages = pages;
2549         new_rq->rq_offset = old_rq->rq_offset;
2550         new_rq->rq_npages = old_rq->rq_npages;
2551         new_rq->rq_pagesz = old_rq->rq_pagesz;
2552         new_rq->rq_tailsz = old_rq->rq_tailsz;
2553
2554         for (i = 0; i < npages; i++) {
2555                 pages[i] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
2556                 if (!pages[i])
2557                         goto err_free_pages;
2558         }
2559
2560         iov = kmalloc_array(old_rq->rq_nvec + 1, sizeof(struct kvec),
2561                             GFP_KERNEL);
2562         if (!iov)
2563                 goto err_free_pages;
2564
2565         /* copy all iovs from the old */
2566         memcpy(&iov[1], &old_rq->rq_iov[0],
2567                                 sizeof(struct kvec) * old_rq->rq_nvec);
2568
2569         new_rq->rq_iov = iov;
2570         new_rq->rq_nvec = old_rq->rq_nvec + 1;
2571
2572         tr_hdr = kmalloc(sizeof(struct smb2_transform_hdr), GFP_KERNEL);
2573         if (!tr_hdr)
2574                 goto err_free_iov;
2575
2576         orig_len = smb_rqst_len(server, old_rq);
2577
2578         /* fill the 2nd iov with a transform header */
2579         fill_transform_hdr(tr_hdr, orig_len, old_rq);
2580         new_rq->rq_iov[0].iov_base = tr_hdr;
2581         new_rq->rq_iov[0].iov_len = sizeof(struct smb2_transform_hdr);
2582
2583         /* copy pages form the old */
2584         for (i = 0; i < npages; i++) {
2585                 char *dst, *src;
2586                 unsigned int offset, len;
2587
2588                 rqst_page_get_length(new_rq, i, &len, &offset);
2589
2590                 dst = (char *) kmap(new_rq->rq_pages[i]) + offset;
2591                 src = (char *) kmap(old_rq->rq_pages[i]) + offset;
2592
2593                 memcpy(dst, src, len);
2594                 kunmap(new_rq->rq_pages[i]);
2595                 kunmap(old_rq->rq_pages[i]);
2596         }
2597
2598         rc = crypt_message(server, new_rq, 1);
2599         cifs_dbg(FYI, "encrypt message returned %d", rc);
2600         if (rc)
2601                 goto err_free_tr_hdr;
2602
2603         return rc;
2604
2605 err_free_tr_hdr:
2606         kfree(tr_hdr);
2607 err_free_iov:
2608         kfree(iov);
2609 err_free_pages:
2610         for (i = i - 1; i >= 0; i--)
2611                 put_page(pages[i]);
2612         kfree(pages);
2613         return rc;
2614 }
2615
2616 static void
2617 smb3_free_transform_rq(struct smb_rqst *rqst)
2618 {
2619         int i = rqst->rq_npages - 1;
2620
2621         for (; i >= 0; i--)
2622                 put_page(rqst->rq_pages[i]);
2623         kfree(rqst->rq_pages);
2624         /* free transform header */
2625         kfree(rqst->rq_iov[0].iov_base);
2626         kfree(rqst->rq_iov);
2627 }
2628
2629 static int
2630 smb3_is_transform_hdr(void *buf)
2631 {
2632         struct smb2_transform_hdr *trhdr = buf;
2633
2634         return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
2635 }
2636
2637 static int
2638 decrypt_raw_data(struct TCP_Server_Info *server, char *buf,
2639                  unsigned int buf_data_size, struct page **pages,
2640                  unsigned int npages, unsigned int page_data_size)
2641 {
2642         struct kvec iov[2];
2643         struct smb_rqst rqst = {NULL};
2644         int rc;
2645
2646         iov[0].iov_base = buf;
2647         iov[0].iov_len = sizeof(struct smb2_transform_hdr);
2648         iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr);
2649         iov[1].iov_len = buf_data_size;
2650
2651         rqst.rq_iov = iov;
2652         rqst.rq_nvec = 2;
2653         rqst.rq_pages = pages;
2654         rqst.rq_npages = npages;
2655         rqst.rq_pagesz = PAGE_SIZE;
2656         rqst.rq_tailsz = (page_data_size % PAGE_SIZE) ? : PAGE_SIZE;
2657
2658         rc = crypt_message(server, &rqst, 0);
2659         cifs_dbg(FYI, "decrypt message returned %d\n", rc);
2660
2661         if (rc)
2662                 return rc;
2663
2664         memmove(buf, iov[1].iov_base, buf_data_size);
2665
2666         server->total_read = buf_data_size + page_data_size;
2667
2668         return rc;
2669 }
2670
2671 static int
2672 read_data_into_pages(struct TCP_Server_Info *server, struct page **pages,
2673                      unsigned int npages, unsigned int len)
2674 {
2675         int i;
2676         int length;
2677
2678         for (i = 0; i < npages; i++) {
2679                 struct page *page = pages[i];
2680                 size_t n;
2681
2682                 n = len;
2683                 if (len >= PAGE_SIZE) {
2684                         /* enough data to fill the page */
2685                         n = PAGE_SIZE;
2686                         len -= n;
2687                 } else {
2688                         zero_user(page, len, PAGE_SIZE - len);
2689                         len = 0;
2690                 }
2691                 length = cifs_read_page_from_socket(server, page, 0, n);
2692                 if (length < 0)
2693                         return length;
2694                 server->total_read += length;
2695         }
2696
2697         return 0;
2698 }
2699
2700 static int
2701 init_read_bvec(struct page **pages, unsigned int npages, unsigned int data_size,
2702                unsigned int cur_off, struct bio_vec **page_vec)
2703 {
2704         struct bio_vec *bvec;
2705         int i;
2706
2707         bvec = kcalloc(npages, sizeof(struct bio_vec), GFP_KERNEL);
2708         if (!bvec)
2709                 return -ENOMEM;
2710
2711         for (i = 0; i < npages; i++) {
2712                 bvec[i].bv_page = pages[i];
2713                 bvec[i].bv_offset = (i == 0) ? cur_off : 0;
2714                 bvec[i].bv_len = min_t(unsigned int, PAGE_SIZE, data_size);
2715                 data_size -= bvec[i].bv_len;
2716         }
2717
2718         if (data_size != 0) {
2719                 cifs_dbg(VFS, "%s: something went wrong\n", __func__);
2720                 kfree(bvec);
2721                 return -EIO;
2722         }
2723
2724         *page_vec = bvec;
2725         return 0;
2726 }
2727
2728 static int
2729 handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid,
2730                  char *buf, unsigned int buf_len, struct page **pages,
2731                  unsigned int npages, unsigned int page_data_size)
2732 {
2733         unsigned int data_offset;
2734         unsigned int data_len;
2735         unsigned int cur_off;
2736         unsigned int cur_page_idx;
2737         unsigned int pad_len;
2738         struct cifs_readdata *rdata = mid->callback_data;
2739         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
2740         struct bio_vec *bvec = NULL;
2741         struct iov_iter iter;
2742         struct kvec iov;
2743         int length;
2744         bool use_rdma_mr = false;
2745
2746         if (shdr->Command != SMB2_READ) {
2747                 cifs_dbg(VFS, "only big read responses are supported\n");
2748                 return -ENOTSUPP;
2749         }
2750
2751         if (server->ops->is_session_expired &&
2752             server->ops->is_session_expired(buf)) {
2753                 cifs_reconnect(server);
2754                 wake_up(&server->response_q);
2755                 return -1;
2756         }
2757
2758         if (server->ops->is_status_pending &&
2759                         server->ops->is_status_pending(buf, server, 0))
2760                 return -1;
2761
2762         rdata->result = server->ops->map_error(buf, false);
2763         if (rdata->result != 0) {
2764                 cifs_dbg(FYI, "%s: server returned error %d\n",
2765                          __func__, rdata->result);
2766                 dequeue_mid(mid, rdata->result);
2767                 return 0;
2768         }
2769
2770         data_offset = server->ops->read_data_offset(buf);
2771 #ifdef CONFIG_CIFS_SMB_DIRECT
2772         use_rdma_mr = rdata->mr;
2773 #endif
2774         data_len = server->ops->read_data_length(buf, use_rdma_mr);
2775
2776         if (data_offset < server->vals->read_rsp_size) {
2777                 /*
2778                  * win2k8 sometimes sends an offset of 0 when the read
2779                  * is beyond the EOF. Treat it as if the data starts just after
2780                  * the header.
2781                  */
2782                 cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n",
2783                          __func__, data_offset);
2784                 data_offset = server->vals->read_rsp_size;
2785         } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) {
2786                 /* data_offset is beyond the end of smallbuf */
2787                 cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n",
2788                          __func__, data_offset);
2789                 rdata->result = -EIO;
2790                 dequeue_mid(mid, rdata->result);
2791                 return 0;
2792         }
2793
2794         pad_len = data_offset - server->vals->read_rsp_size;
2795
2796         if (buf_len <= data_offset) {
2797                 /* read response payload is in pages */
2798                 cur_page_idx = pad_len / PAGE_SIZE;
2799                 cur_off = pad_len % PAGE_SIZE;
2800
2801                 if (cur_page_idx != 0) {
2802                         /* data offset is beyond the 1st page of response */
2803                         cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n",
2804                                  __func__, data_offset);
2805                         rdata->result = -EIO;
2806                         dequeue_mid(mid, rdata->result);
2807                         return 0;
2808                 }
2809
2810                 if (data_len > page_data_size - pad_len) {
2811                         /* data_len is corrupt -- discard frame */
2812                         rdata->result = -EIO;
2813                         dequeue_mid(mid, rdata->result);
2814                         return 0;
2815                 }
2816
2817                 rdata->result = init_read_bvec(pages, npages, page_data_size,
2818                                                cur_off, &bvec);
2819                 if (rdata->result != 0) {
2820                         dequeue_mid(mid, rdata->result);
2821                         return 0;
2822                 }
2823
2824                 iov_iter_bvec(&iter, WRITE | ITER_BVEC, bvec, npages, data_len);
2825         } else if (buf_len >= data_offset + data_len) {
2826                 /* read response payload is in buf */
2827                 WARN_ONCE(npages > 0, "read data can be either in buf or in pages");
2828                 iov.iov_base = buf + data_offset;
2829                 iov.iov_len = data_len;
2830                 iov_iter_kvec(&iter, WRITE | ITER_KVEC, &iov, 1, data_len);
2831         } else {
2832                 /* read response payload cannot be in both buf and pages */
2833                 WARN_ONCE(1, "buf can not contain only a part of read data");
2834                 rdata->result = -EIO;
2835                 dequeue_mid(mid, rdata->result);
2836                 return 0;
2837         }
2838
2839         /* set up first iov for signature check */
2840         rdata->iov[0].iov_base = buf;
2841         rdata->iov[0].iov_len = 4;
2842         rdata->iov[1].iov_base = buf + 4;
2843         rdata->iov[1].iov_len = server->vals->read_rsp_size - 4;
2844         cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n",
2845                  rdata->iov[0].iov_base, server->vals->read_rsp_size);
2846
2847         length = rdata->copy_into_pages(server, rdata, &iter);
2848
2849         kfree(bvec);
2850
2851         if (length < 0)
2852                 return length;
2853
2854         dequeue_mid(mid, false);
2855         return length;
2856 }
2857
2858 static int
2859 receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid)
2860 {
2861         char *buf = server->smallbuf;
2862         struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
2863         unsigned int npages;
2864         struct page **pages;
2865         unsigned int len;
2866         unsigned int buflen = server->pdu_size;
2867         int rc;
2868         int i = 0;
2869
2870         len = min_t(unsigned int, buflen, server->vals->read_rsp_size +
2871                 sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1;
2872
2873         rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len);
2874         if (rc < 0)
2875                 return rc;
2876         server->total_read += rc;
2877
2878         len = le32_to_cpu(tr_hdr->OriginalMessageSize) -
2879                 server->vals->read_rsp_size;
2880         npages = DIV_ROUND_UP(len, PAGE_SIZE);
2881
2882         pages = kmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
2883         if (!pages) {
2884                 rc = -ENOMEM;
2885                 goto discard_data;
2886         }
2887
2888         for (; i < npages; i++) {
2889                 pages[i] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
2890                 if (!pages[i]) {
2891                         rc = -ENOMEM;
2892                         goto discard_data;
2893                 }
2894         }
2895
2896         /* read read data into pages */
2897         rc = read_data_into_pages(server, pages, npages, len);
2898         if (rc)
2899                 goto free_pages;
2900
2901         rc = cifs_discard_remaining_data(server);
2902         if (rc)
2903                 goto free_pages;
2904
2905         rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size,
2906                               pages, npages, len);
2907         if (rc)
2908                 goto free_pages;
2909
2910         *mid = smb2_find_mid(server, buf);
2911         if (*mid == NULL)
2912                 cifs_dbg(FYI, "mid not found\n");
2913         else {
2914                 cifs_dbg(FYI, "mid found\n");
2915                 (*mid)->decrypted = true;
2916                 rc = handle_read_data(server, *mid, buf,
2917                                       server->vals->read_rsp_size,
2918                                       pages, npages, len);
2919         }
2920
2921 free_pages:
2922         for (i = i - 1; i >= 0; i--)
2923                 put_page(pages[i]);
2924         kfree(pages);
2925         return rc;
2926 discard_data:
2927         cifs_discard_remaining_data(server);
2928         goto free_pages;
2929 }
2930
2931 static int
2932 receive_encrypted_standard(struct TCP_Server_Info *server,
2933                            struct mid_q_entry **mid)
2934 {
2935         int length;
2936         char *buf = server->smallbuf;
2937         unsigned int pdu_length = server->pdu_size;
2938         unsigned int buf_size;
2939         struct mid_q_entry *mid_entry;
2940
2941         /* switch to large buffer if too big for a small one */
2942         if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE) {
2943                 server->large_buf = true;
2944                 memcpy(server->bigbuf, buf, server->total_read);
2945                 buf = server->bigbuf;
2946         }
2947
2948         /* now read the rest */
2949         length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
2950                                 pdu_length - HEADER_SIZE(server) + 1);
2951         if (length < 0)
2952                 return length;
2953         server->total_read += length;
2954
2955         buf_size = pdu_length - sizeof(struct smb2_transform_hdr);
2956         length = decrypt_raw_data(server, buf, buf_size, NULL, 0, 0);
2957         if (length)
2958                 return length;
2959
2960         mid_entry = smb2_find_mid(server, buf);
2961         if (mid_entry == NULL)
2962                 cifs_dbg(FYI, "mid not found\n");
2963         else {
2964                 cifs_dbg(FYI, "mid found\n");
2965                 mid_entry->decrypted = true;
2966         }
2967
2968         *mid = mid_entry;
2969
2970         if (mid_entry && mid_entry->handle)
2971                 return mid_entry->handle(server, mid_entry);
2972
2973         return cifs_handle_standard(server, mid_entry);
2974 }
2975
2976 static int
2977 smb3_receive_transform(struct TCP_Server_Info *server, struct mid_q_entry **mid)
2978 {
2979         char *buf = server->smallbuf;
2980         unsigned int pdu_length = server->pdu_size;
2981         struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
2982         unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
2983
2984         if (pdu_length < sizeof(struct smb2_transform_hdr) +
2985                                                 sizeof(struct smb2_sync_hdr)) {
2986                 cifs_dbg(VFS, "Transform message is too small (%u)\n",
2987                          pdu_length);
2988                 cifs_reconnect(server);
2989                 wake_up(&server->response_q);
2990                 return -ECONNABORTED;
2991         }
2992
2993         if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) {
2994                 cifs_dbg(VFS, "Transform message is broken\n");
2995                 cifs_reconnect(server);
2996                 wake_up(&server->response_q);
2997                 return -ECONNABORTED;
2998         }
2999
3000         if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server))
3001                 return receive_encrypted_read(server, mid);
3002
3003         return receive_encrypted_standard(server, mid);
3004 }
3005
3006 int
3007 smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid)
3008 {
3009         char *buf = server->large_buf ? server->bigbuf : server->smallbuf;
3010
3011         return handle_read_data(server, mid, buf, server->pdu_size,
3012                                 NULL, 0, 0);
3013 }
3014
3015 static int
3016 smb2_next_header(char *buf)
3017 {
3018         struct smb2_sync_hdr *hdr = (struct smb2_sync_hdr *)buf;
3019         struct smb2_transform_hdr *t_hdr = (struct smb2_transform_hdr *)buf;
3020
3021         if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM)
3022                 return sizeof(struct smb2_transform_hdr) +
3023                   le32_to_cpu(t_hdr->OriginalMessageSize);
3024
3025         return le32_to_cpu(hdr->NextCommand);
3026 }
3027
3028 struct smb_version_operations smb20_operations = {
3029         .compare_fids = smb2_compare_fids,
3030         .setup_request = smb2_setup_request,
3031         .setup_async_request = smb2_setup_async_request,
3032         .check_receive = smb2_check_receive,
3033         .add_credits = smb2_add_credits,
3034         .set_credits = smb2_set_credits,
3035         .get_credits_field = smb2_get_credits_field,
3036         .get_credits = smb2_get_credits,
3037         .wait_mtu_credits = cifs_wait_mtu_credits,
3038         .get_next_mid = smb2_get_next_mid,
3039         .read_data_offset = smb2_read_data_offset,
3040         .read_data_length = smb2_read_data_length,
3041         .map_error = map_smb2_to_linux_error,
3042         .find_mid = smb2_find_mid,
3043         .check_message = smb2_check_message,
3044         .dump_detail = smb2_dump_detail,
3045         .clear_stats = smb2_clear_stats,
3046         .print_stats = smb2_print_stats,
3047         .is_oplock_break = smb2_is_valid_oplock_break,
3048         .handle_cancelled_mid = smb2_handle_cancelled_mid,
3049         .downgrade_oplock = smb2_downgrade_oplock,
3050         .need_neg = smb2_need_neg,
3051         .negotiate = smb2_negotiate,
3052         .negotiate_wsize = smb2_negotiate_wsize,
3053         .negotiate_rsize = smb2_negotiate_rsize,
3054         .sess_setup = SMB2_sess_setup,
3055         .logoff = SMB2_logoff,
3056         .tree_connect = SMB2_tcon,
3057         .tree_disconnect = SMB2_tdis,
3058         .qfs_tcon = smb2_qfs_tcon,
3059         .is_path_accessible = smb2_is_path_accessible,
3060         .can_echo = smb2_can_echo,
3061         .echo = SMB2_echo,
3062         .query_path_info = smb2_query_path_info,
3063         .get_srv_inum = smb2_get_srv_inum,
3064         .query_file_info = smb2_query_file_info,
3065         .set_path_size = smb2_set_path_size,
3066         .set_file_size = smb2_set_file_size,
3067         .set_file_info = smb2_set_file_info,
3068         .set_compression = smb2_set_compression,
3069         .mkdir = smb2_mkdir,
3070         .mkdir_setinfo = smb2_mkdir_setinfo,
3071         .rmdir = smb2_rmdir,
3072         .unlink = smb2_unlink,
3073         .rename = smb2_rename_path,
3074         .create_hardlink = smb2_create_hardlink,
3075         .query_symlink = smb2_query_symlink,
3076         .query_mf_symlink = smb3_query_mf_symlink,
3077         .create_mf_symlink = smb3_create_mf_symlink,
3078         .open = smb2_open_file,
3079         .set_fid = smb2_set_fid,
3080         .close = smb2_close_file,
3081         .flush = smb2_flush_file,
3082         .async_readv = smb2_async_readv,
3083         .async_writev = smb2_async_writev,
3084         .sync_read = smb2_sync_read,
3085         .sync_write = smb2_sync_write,
3086         .query_dir_first = smb2_query_dir_first,
3087         .query_dir_next = smb2_query_dir_next,
3088         .close_dir = smb2_close_dir,
3089         .calc_smb_size = smb2_calc_size,
3090         .is_status_pending = smb2_is_status_pending,
3091         .is_session_expired = smb2_is_session_expired,
3092         .oplock_response = smb2_oplock_response,
3093         .queryfs = smb2_queryfs,
3094         .mand_lock = smb2_mand_lock,
3095         .mand_unlock_range = smb2_unlock_range,
3096         .push_mand_locks = smb2_push_mandatory_locks,
3097         .get_lease_key = smb2_get_lease_key,
3098         .set_lease_key = smb2_set_lease_key,
3099         .new_lease_key = smb2_new_lease_key,
3100         .calc_signature = smb2_calc_signature,
3101         .is_read_op = smb2_is_read_op,
3102         .set_oplock_level = smb2_set_oplock_level,
3103         .create_lease_buf = smb2_create_lease_buf,
3104         .parse_lease_buf = smb2_parse_lease_buf,
3105         .copychunk_range = smb2_copychunk_range,
3106         .wp_retry_size = smb2_wp_retry_size,
3107         .dir_needs_close = smb2_dir_needs_close,
3108         .get_dfs_refer = smb2_get_dfs_refer,
3109         .select_sectype = smb2_select_sectype,
3110 #ifdef CONFIG_CIFS_XATTR
3111         .query_all_EAs = smb2_query_eas,
3112         .set_EA = smb2_set_ea,
3113 #endif /* CIFS_XATTR */
3114 #ifdef CONFIG_CIFS_ACL
3115         .get_acl = get_smb2_acl,
3116         .get_acl_by_fid = get_smb2_acl_by_fid,
3117         .set_acl = set_smb2_acl,
3118 #endif /* CIFS_ACL */
3119         .next_header = smb2_next_header,
3120 };
3121
3122 struct smb_version_operations smb21_operations = {
3123         .compare_fids = smb2_compare_fids,
3124         .setup_request = smb2_setup_request,
3125         .setup_async_request = smb2_setup_async_request,
3126         .check_receive = smb2_check_receive,
3127         .add_credits = smb2_add_credits,
3128         .set_credits = smb2_set_credits,
3129         .get_credits_field = smb2_get_credits_field,
3130         .get_credits = smb2_get_credits,
3131         .wait_mtu_credits = smb2_wait_mtu_credits,
3132         .get_next_mid = smb2_get_next_mid,
3133         .read_data_offset = smb2_read_data_offset,
3134         .read_data_length = smb2_read_data_length,
3135         .map_error = map_smb2_to_linux_error,
3136         .find_mid = smb2_find_mid,
3137         .check_message = smb2_check_message,
3138         .dump_detail = smb2_dump_detail,
3139         .clear_stats = smb2_clear_stats,
3140         .print_stats = smb2_print_stats,
3141         .is_oplock_break = smb2_is_valid_oplock_break,
3142         .handle_cancelled_mid = smb2_handle_cancelled_mid,
3143         .downgrade_oplock = smb2_downgrade_oplock,
3144         .need_neg = smb2_need_neg,
3145         .negotiate = smb2_negotiate,
3146         .negotiate_wsize = smb2_negotiate_wsize,
3147         .negotiate_rsize = smb2_negotiate_rsize,
3148         .sess_setup = SMB2_sess_setup,
3149         .logoff = SMB2_logoff,
3150         .tree_connect = SMB2_tcon,
3151         .tree_disconnect = SMB2_tdis,
3152         .qfs_tcon = smb2_qfs_tcon,
3153         .is_path_accessible = smb2_is_path_accessible,
3154         .can_echo = smb2_can_echo,
3155         .echo = SMB2_echo,
3156         .query_path_info = smb2_query_path_info,
3157         .get_srv_inum = smb2_get_srv_inum,
3158         .query_file_info = smb2_query_file_info,
3159         .set_path_size = smb2_set_path_size,
3160         .set_file_size = smb2_set_file_size,
3161         .set_file_info = smb2_set_file_info,
3162         .set_compression = smb2_set_compression,
3163         .mkdir = smb2_mkdir,
3164         .mkdir_setinfo = smb2_mkdir_setinfo,
3165         .rmdir = smb2_rmdir,
3166         .unlink = smb2_unlink,
3167         .rename = smb2_rename_path,
3168         .create_hardlink = smb2_create_hardlink,
3169         .query_symlink = smb2_query_symlink,
3170         .query_mf_symlink = smb3_query_mf_symlink,
3171         .create_mf_symlink = smb3_create_mf_symlink,
3172         .open = smb2_open_file,
3173         .set_fid = smb2_set_fid,
3174         .close = smb2_close_file,
3175         .flush = smb2_flush_file,
3176         .async_readv = smb2_async_readv,
3177         .async_writev = smb2_async_writev,
3178         .sync_read = smb2_sync_read,
3179         .sync_write = smb2_sync_write,
3180         .query_dir_first = smb2_query_dir_first,
3181         .query_dir_next = smb2_query_dir_next,
3182         .close_dir = smb2_close_dir,
3183         .calc_smb_size = smb2_calc_size,
3184         .is_status_pending = smb2_is_status_pending,
3185         .is_session_expired = smb2_is_session_expired,
3186         .oplock_response = smb2_oplock_response,
3187         .queryfs = smb2_queryfs,
3188         .mand_lock = smb2_mand_lock,
3189         .mand_unlock_range = smb2_unlock_range,
3190         .push_mand_locks = smb2_push_mandatory_locks,
3191         .get_lease_key = smb2_get_lease_key,
3192         .set_lease_key = smb2_set_lease_key,
3193         .new_lease_key = smb2_new_lease_key,
3194         .calc_signature = smb2_calc_signature,
3195         .is_read_op = smb21_is_read_op,
3196         .set_oplock_level = smb21_set_oplock_level,
3197         .create_lease_buf = smb2_create_lease_buf,
3198         .parse_lease_buf = smb2_parse_lease_buf,
3199         .copychunk_range = smb2_copychunk_range,
3200         .wp_retry_size = smb2_wp_retry_size,
3201         .dir_needs_close = smb2_dir_needs_close,
3202         .enum_snapshots = smb3_enum_snapshots,
3203         .get_dfs_refer = smb2_get_dfs_refer,
3204         .select_sectype = smb2_select_sectype,
3205 #ifdef CONFIG_CIFS_XATTR
3206         .query_all_EAs = smb2_query_eas,
3207         .set_EA = smb2_set_ea,
3208 #endif /* CIFS_XATTR */
3209 #ifdef CONFIG_CIFS_ACL
3210         .get_acl = get_smb2_acl,
3211         .get_acl_by_fid = get_smb2_acl_by_fid,
3212         .set_acl = set_smb2_acl,
3213 #endif /* CIFS_ACL */
3214         .next_header = smb2_next_header,
3215 };
3216
3217 struct smb_version_operations smb30_operations = {
3218         .compare_fids = smb2_compare_fids,
3219         .setup_request = smb2_setup_request,
3220         .setup_async_request = smb2_setup_async_request,
3221         .check_receive = smb2_check_receive,
3222         .add_credits = smb2_add_credits,
3223         .set_credits = smb2_set_credits,
3224         .get_credits_field = smb2_get_credits_field,
3225         .get_credits = smb2_get_credits,
3226         .wait_mtu_credits = smb2_wait_mtu_credits,
3227         .get_next_mid = smb2_get_next_mid,
3228         .read_data_offset = smb2_read_data_offset,
3229         .read_data_length = smb2_read_data_length,
3230         .map_error = map_smb2_to_linux_error,
3231         .find_mid = smb2_find_mid,
3232         .check_message = smb2_check_message,
3233         .dump_detail = smb2_dump_detail,
3234         .clear_stats = smb2_clear_stats,
3235         .print_stats = smb2_print_stats,
3236         .dump_share_caps = smb2_dump_share_caps,
3237         .is_oplock_break = smb2_is_valid_oplock_break,
3238         .handle_cancelled_mid = smb2_handle_cancelled_mid,
3239         .downgrade_oplock = smb2_downgrade_oplock,
3240         .need_neg = smb2_need_neg,
3241         .negotiate = smb2_negotiate,
3242         .negotiate_wsize = smb2_negotiate_wsize,
3243         .negotiate_rsize = smb2_negotiate_rsize,
3244         .sess_setup = SMB2_sess_setup,
3245         .logoff = SMB2_logoff,
3246         .tree_connect = SMB2_tcon,
3247         .tree_disconnect = SMB2_tdis,
3248         .qfs_tcon = smb3_qfs_tcon,
3249         .is_path_accessible = smb2_is_path_accessible,
3250         .can_echo = smb2_can_echo,
3251         .echo = SMB2_echo,
3252         .query_path_info = smb2_query_path_info,
3253         .get_srv_inum = smb2_get_srv_inum,
3254         .query_file_info = smb2_query_file_info,
3255         .set_path_size = smb2_set_path_size,
3256         .set_file_size = smb2_set_file_size,
3257         .set_file_info = smb2_set_file_info,
3258         .set_compression = smb2_set_compression,
3259         .mkdir = smb2_mkdir,
3260         .mkdir_setinfo = smb2_mkdir_setinfo,
3261         .rmdir = smb2_rmdir,
3262         .unlink = smb2_unlink,
3263         .rename = smb2_rename_path,
3264         .create_hardlink = smb2_create_hardlink,
3265         .query_symlink = smb2_query_symlink,
3266         .query_mf_symlink = smb3_query_mf_symlink,
3267         .create_mf_symlink = smb3_create_mf_symlink,
3268         .open = smb2_open_file,
3269         .set_fid = smb2_set_fid,
3270         .close = smb2_close_file,
3271         .flush = smb2_flush_file,
3272         .async_readv = smb2_async_readv,
3273         .async_writev = smb2_async_writev,
3274         .sync_read = smb2_sync_read,
3275         .sync_write = smb2_sync_write,
3276         .query_dir_first = smb2_query_dir_first,
3277         .query_dir_next = smb2_query_dir_next,
3278         .close_dir = smb2_close_dir,
3279         .calc_smb_size = smb2_calc_size,
3280         .is_status_pending = smb2_is_status_pending,
3281         .is_session_expired = smb2_is_session_expired,
3282         .oplock_response = smb2_oplock_response,
3283         .queryfs = smb2_queryfs,
3284         .mand_lock = smb2_mand_lock,
3285         .mand_unlock_range = smb2_unlock_range,
3286         .push_mand_locks = smb2_push_mandatory_locks,
3287         .get_lease_key = smb2_get_lease_key,
3288         .set_lease_key = smb2_set_lease_key,
3289         .new_lease_key = smb2_new_lease_key,
3290         .generate_signingkey = generate_smb30signingkey,
3291         .calc_signature = smb3_calc_signature,
3292         .set_integrity  = smb3_set_integrity,
3293         .is_read_op = smb21_is_read_op,
3294         .set_oplock_level = smb3_set_oplock_level,
3295         .create_lease_buf = smb3_create_lease_buf,
3296         .parse_lease_buf = smb3_parse_lease_buf,
3297         .copychunk_range = smb2_copychunk_range,
3298         .duplicate_extents = smb2_duplicate_extents,
3299         .validate_negotiate = smb3_validate_negotiate,
3300         .wp_retry_size = smb2_wp_retry_size,
3301         .dir_needs_close = smb2_dir_needs_close,
3302         .fallocate = smb3_fallocate,
3303         .enum_snapshots = smb3_enum_snapshots,
3304         .init_transform_rq = smb3_init_transform_rq,
3305         .free_transform_rq = smb3_free_transform_rq,
3306         .is_transform_hdr = smb3_is_transform_hdr,
3307         .receive_transform = smb3_receive_transform,
3308         .get_dfs_refer = smb2_get_dfs_refer,
3309         .select_sectype = smb2_select_sectype,
3310 #ifdef CONFIG_CIFS_XATTR
3311         .query_all_EAs = smb2_query_eas,
3312         .set_EA = smb2_set_ea,
3313 #endif /* CIFS_XATTR */
3314 #ifdef CONFIG_CIFS_ACL
3315         .get_acl = get_smb2_acl,
3316         .get_acl_by_fid = get_smb2_acl_by_fid,
3317         .set_acl = set_smb2_acl,
3318 #endif /* CIFS_ACL */
3319         .next_header = smb2_next_header,
3320 };
3321
3322 struct smb_version_operations smb311_operations = {
3323         .compare_fids = smb2_compare_fids,
3324         .setup_request = smb2_setup_request,
3325         .setup_async_request = smb2_setup_async_request,
3326         .check_receive = smb2_check_receive,
3327         .add_credits = smb2_add_credits,
3328         .set_credits = smb2_set_credits,
3329         .get_credits_field = smb2_get_credits_field,
3330         .get_credits = smb2_get_credits,
3331         .wait_mtu_credits = smb2_wait_mtu_credits,
3332         .get_next_mid = smb2_get_next_mid,
3333         .read_data_offset = smb2_read_data_offset,
3334         .read_data_length = smb2_read_data_length,
3335         .map_error = map_smb2_to_linux_error,
3336         .find_mid = smb2_find_mid,
3337         .check_message = smb2_check_message,
3338         .dump_detail = smb2_dump_detail,
3339         .clear_stats = smb2_clear_stats,
3340         .print_stats = smb2_print_stats,
3341         .dump_share_caps = smb2_dump_share_caps,
3342         .is_oplock_break = smb2_is_valid_oplock_break,
3343         .handle_cancelled_mid = smb2_handle_cancelled_mid,
3344         .downgrade_oplock = smb2_downgrade_oplock,
3345         .need_neg = smb2_need_neg,
3346         .negotiate = smb2_negotiate,
3347         .negotiate_wsize = smb2_negotiate_wsize,
3348         .negotiate_rsize = smb2_negotiate_rsize,
3349         .sess_setup = SMB2_sess_setup,
3350         .logoff = SMB2_logoff,
3351         .tree_connect = SMB2_tcon,
3352         .tree_disconnect = SMB2_tdis,
3353         .qfs_tcon = smb3_qfs_tcon,
3354         .is_path_accessible = smb2_is_path_accessible,
3355         .can_echo = smb2_can_echo,
3356         .echo = SMB2_echo,
3357         .query_path_info = smb2_query_path_info,
3358         .get_srv_inum = smb2_get_srv_inum,
3359         .query_file_info = smb2_query_file_info,
3360         .set_path_size = smb2_set_path_size,
3361         .set_file_size = smb2_set_file_size,
3362         .set_file_info = smb2_set_file_info,
3363         .set_compression = smb2_set_compression,
3364         .mkdir = smb2_mkdir,
3365         .mkdir_setinfo = smb2_mkdir_setinfo,
3366         .posix_mkdir = smb311_posix_mkdir,
3367         .rmdir = smb2_rmdir,
3368         .unlink = smb2_unlink,
3369         .rename = smb2_rename_path,
3370         .create_hardlink = smb2_create_hardlink,
3371         .query_symlink = smb2_query_symlink,
3372         .query_mf_symlink = smb3_query_mf_symlink,
3373         .create_mf_symlink = smb3_create_mf_symlink,
3374         .open = smb2_open_file,
3375         .set_fid = smb2_set_fid,
3376         .close = smb2_close_file,
3377         .flush = smb2_flush_file,
3378         .async_readv = smb2_async_readv,
3379         .async_writev = smb2_async_writev,
3380         .sync_read = smb2_sync_read,
3381         .sync_write = smb2_sync_write,
3382         .query_dir_first = smb2_query_dir_first,
3383         .query_dir_next = smb2_query_dir_next,
3384         .close_dir = smb2_close_dir,
3385         .calc_smb_size = smb2_calc_size,
3386         .is_status_pending = smb2_is_status_pending,
3387         .is_session_expired = smb2_is_session_expired,
3388         .oplock_response = smb2_oplock_response,
3389         .queryfs = smb311_queryfs,
3390         .mand_lock = smb2_mand_lock,
3391         .mand_unlock_range = smb2_unlock_range,
3392         .push_mand_locks = smb2_push_mandatory_locks,
3393         .get_lease_key = smb2_get_lease_key,
3394         .set_lease_key = smb2_set_lease_key,
3395         .new_lease_key = smb2_new_lease_key,
3396         .generate_signingkey = generate_smb311signingkey,
3397         .calc_signature = smb3_calc_signature,
3398         .set_integrity  = smb3_set_integrity,
3399         .is_read_op = smb21_is_read_op,
3400         .set_oplock_level = smb3_set_oplock_level,
3401         .create_lease_buf = smb3_create_lease_buf,
3402         .parse_lease_buf = smb3_parse_lease_buf,
3403         .copychunk_range = smb2_copychunk_range,
3404         .duplicate_extents = smb2_duplicate_extents,
3405 /*      .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
3406         .wp_retry_size = smb2_wp_retry_size,
3407         .dir_needs_close = smb2_dir_needs_close,
3408         .fallocate = smb3_fallocate,
3409         .enum_snapshots = smb3_enum_snapshots,
3410         .init_transform_rq = smb3_init_transform_rq,
3411         .free_transform_rq = smb3_free_transform_rq,
3412         .is_transform_hdr = smb3_is_transform_hdr,
3413         .receive_transform = smb3_receive_transform,
3414         .get_dfs_refer = smb2_get_dfs_refer,
3415         .select_sectype = smb2_select_sectype,
3416 #ifdef CONFIG_CIFS_XATTR
3417         .query_all_EAs = smb2_query_eas,
3418         .set_EA = smb2_set_ea,
3419 #endif /* CIFS_XATTR */
3420         .next_header = smb2_next_header,
3421 };
3422
3423 struct smb_version_values smb20_values = {
3424         .version_string = SMB20_VERSION_STRING,
3425         .protocol_id = SMB20_PROT_ID,
3426         .req_capabilities = 0, /* MBZ */
3427         .large_lock_type = 0,
3428         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3429         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3430         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3431         .header_size = sizeof(struct smb2_sync_hdr),
3432         .header_preamble_size = 0,
3433         .max_header_size = MAX_SMB2_HDR_SIZE,
3434         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3435         .lock_cmd = SMB2_LOCK,
3436         .cap_unix = 0,
3437         .cap_nt_find = SMB2_NT_FIND,
3438         .cap_large_files = SMB2_LARGE_FILES,
3439         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3440         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3441         .create_lease_size = sizeof(struct create_lease),
3442 };
3443
3444 struct smb_version_values smb21_values = {
3445         .version_string = SMB21_VERSION_STRING,
3446         .protocol_id = SMB21_PROT_ID,
3447         .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
3448         .large_lock_type = 0,
3449         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3450         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3451         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3452         .header_size = sizeof(struct smb2_sync_hdr),
3453         .header_preamble_size = 0,
3454         .max_header_size = MAX_SMB2_HDR_SIZE,
3455         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3456         .lock_cmd = SMB2_LOCK,
3457         .cap_unix = 0,
3458         .cap_nt_find = SMB2_NT_FIND,
3459         .cap_large_files = SMB2_LARGE_FILES,
3460         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3461         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3462         .create_lease_size = sizeof(struct create_lease),
3463 };
3464
3465 struct smb_version_values smb3any_values = {
3466         .version_string = SMB3ANY_VERSION_STRING,
3467         .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
3468         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
3469         .large_lock_type = 0,
3470         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3471         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3472         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3473         .header_size = sizeof(struct smb2_sync_hdr),
3474         .header_preamble_size = 0,
3475         .max_header_size = MAX_SMB2_HDR_SIZE,
3476         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3477         .lock_cmd = SMB2_LOCK,
3478         .cap_unix = 0,
3479         .cap_nt_find = SMB2_NT_FIND,
3480         .cap_large_files = SMB2_LARGE_FILES,
3481         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3482         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3483         .create_lease_size = sizeof(struct create_lease_v2),
3484 };
3485
3486 struct smb_version_values smbdefault_values = {
3487         .version_string = SMBDEFAULT_VERSION_STRING,
3488         .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
3489         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
3490         .large_lock_type = 0,
3491         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3492         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3493         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3494         .header_size = sizeof(struct smb2_sync_hdr),
3495         .header_preamble_size = 0,
3496         .max_header_size = MAX_SMB2_HDR_SIZE,
3497         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3498         .lock_cmd = SMB2_LOCK,
3499         .cap_unix = 0,
3500         .cap_nt_find = SMB2_NT_FIND,
3501         .cap_large_files = SMB2_LARGE_FILES,
3502         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3503         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3504         .create_lease_size = sizeof(struct create_lease_v2),
3505 };
3506
3507 struct smb_version_values smb30_values = {
3508         .version_string = SMB30_VERSION_STRING,
3509         .protocol_id = SMB30_PROT_ID,
3510         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
3511         .large_lock_type = 0,
3512         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3513         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3514         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3515         .header_size = sizeof(struct smb2_sync_hdr),
3516         .header_preamble_size = 0,
3517         .max_header_size = MAX_SMB2_HDR_SIZE,
3518         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3519         .lock_cmd = SMB2_LOCK,
3520         .cap_unix = 0,
3521         .cap_nt_find = SMB2_NT_FIND,
3522         .cap_large_files = SMB2_LARGE_FILES,
3523         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3524         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3525         .create_lease_size = sizeof(struct create_lease_v2),
3526 };
3527
3528 struct smb_version_values smb302_values = {
3529         .version_string = SMB302_VERSION_STRING,
3530         .protocol_id = SMB302_PROT_ID,
3531         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
3532         .large_lock_type = 0,
3533         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3534         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3535         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3536         .header_size = sizeof(struct smb2_sync_hdr),
3537         .header_preamble_size = 0,
3538         .max_header_size = MAX_SMB2_HDR_SIZE,
3539         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3540         .lock_cmd = SMB2_LOCK,
3541         .cap_unix = 0,
3542         .cap_nt_find = SMB2_NT_FIND,
3543         .cap_large_files = SMB2_LARGE_FILES,
3544         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3545         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3546         .create_lease_size = sizeof(struct create_lease_v2),
3547 };
3548
3549 struct smb_version_values smb311_values = {
3550         .version_string = SMB311_VERSION_STRING,
3551         .protocol_id = SMB311_PROT_ID,
3552         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
3553         .large_lock_type = 0,
3554         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3555         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3556         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3557         .header_size = sizeof(struct smb2_sync_hdr),
3558         .header_preamble_size = 0,
3559         .max_header_size = MAX_SMB2_HDR_SIZE,
3560         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3561         .lock_cmd = SMB2_LOCK,
3562         .cap_unix = 0,
3563         .cap_nt_find = SMB2_NT_FIND,
3564         .cap_large_files = SMB2_LARGE_FILES,
3565         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3566         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3567         .create_lease_size = sizeof(struct create_lease_v2),
3568 };