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 != 0) {
 448                 cifs_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
 449                 goto out;
 450         }
 451
 452         rc = parse_server_interfaces(out_buf, ret_data_len,
 453                                      &iface_list, &iface_count);
 454         if (rc)
 455                 goto out;
 456
 457         spin_lock(&ses->iface_lock);
 458         kfree(ses->iface_list);
 459         ses->iface_list = iface_list;
 460         ses->iface_count = iface_count;
 461         ses->iface_last_update = jiffies;
 462         spin_unlock(&ses->iface_lock);
 463
 464 out:
 465         kfree(out_buf);
 466         return rc;
 467 }
 468
 469 void
 470 smb2_cached_lease_break(struct work_struct *work)
 471 {
 472         struct cached_fid *cfid = container_of(work,
 473                                 struct cached_fid, lease_break);
 474         mutex_lock(&cfid->fid_mutex);
 475         if (cfid->is_valid) {
 476                 cifs_dbg(FYI, "clear cached root file handle\n");
 477                 SMB2_close(0, cfid->tcon, cfid->fid->persistent_fid,
 478                            cfid->fid->volatile_fid);
 479                 cfid->is_valid = false;
 480         }
 481         mutex_unlock(&cfid->fid_mutex);
 482 }
 483
 484 /*
 485  * Open the directory at the root of a share
 486  */
 487 int open_shroot(unsigned int xid, struct cifs_tcon *tcon, struct cifs_fid *pfid)
 488 {
 489         struct cifs_open_parms oparams;
 490         int rc;
 491         __le16 srch_path = 0; /* Null - since an open of top of share */
 492         u8 oplock = SMB2_OPLOCK_LEVEL_II;
 493
 494         mutex_lock(&tcon->crfid.fid_mutex);
 495         if (tcon->crfid.is_valid) {
 496                 cifs_dbg(FYI, "found a cached root file handle\n");
 497                 memcpy(pfid, tcon->crfid.fid, sizeof(struct cifs_fid));
 498                 mutex_unlock(&tcon->crfid.fid_mutex);
 499                 return 0;
 500         }
 501
 502         oparams.tcon = tcon;
 503         oparams.create_options = 0;
 504         oparams.desired_access = FILE_READ_ATTRIBUTES;
 505         oparams.disposition = FILE_OPEN;
 506         oparams.fid = pfid;
 507         oparams.reconnect = false;
 508
 509         rc = SMB2_open(xid, &oparams, &srch_path, &oplock, NULL, NULL, NULL);
 510         if (rc == 0) {
 511                 memcpy(tcon->crfid.fid, pfid, sizeof(struct cifs_fid));
 512                 tcon->crfid.tcon = tcon;
 513                 tcon->crfid.is_valid = true;
 514         }
 515         mutex_unlock(&tcon->crfid.fid_mutex);
 516         return rc;
 517 }
 518
 519 static void
 520 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
 521 {
 522         int rc;
 523         __le16 srch_path = 0; /* Null - open root of share */
 524         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 525         struct cifs_open_parms oparms;
 526         struct cifs_fid fid;
 527         bool no_cached_open = tcon->nohandlecache;
 528
 529         oparms.tcon = tcon;
 530         oparms.desired_access = FILE_READ_ATTRIBUTES;
 531         oparms.disposition = FILE_OPEN;
 532         oparms.create_options = 0;
 533         oparms.fid = &fid;
 534         oparms.reconnect = false;
 535
 536         if (no_cached_open)
 537                 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
 538                                NULL);
 539         else
 540                 rc = open_shroot(xid, tcon, &fid);
 541
 542         if (rc)
 543                 return;
 544
 545         SMB3_request_interfaces(xid, tcon);
 546
 547         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 548                         FS_ATTRIBUTE_INFORMATION);
 549         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 550                         FS_DEVICE_INFORMATION);
 551         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 552                         FS_VOLUME_INFORMATION);
 553         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 554                         FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
 555         if (no_cached_open)
 556                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 557         return;
 558 }
 559
 560 static void
 561 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
 562 {
 563         int rc;
 564         __le16 srch_path = 0; /* Null - open root of share */
 565         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 566         struct cifs_open_parms oparms;
 567         struct cifs_fid fid;
 568
 569         oparms.tcon = tcon;
 570         oparms.desired_access = FILE_READ_ATTRIBUTES;
 571         oparms.disposition = FILE_OPEN;
 572         oparms.create_options = 0;
 573         oparms.fid = &fid;
 574         oparms.reconnect = false;
 575
 576         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, NULL);
 577         if (rc)
 578                 return;
 579
 580         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 581                         FS_ATTRIBUTE_INFORMATION);
 582         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 583                         FS_DEVICE_INFORMATION);
 584         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 585         return;
 586 }
 587
 588 static int
 589 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
 590                         struct cifs_sb_info *cifs_sb, const char *full_path)
 591 {
 592         int rc;
 593         __le16 *utf16_path;
 594         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 595         struct cifs_open_parms oparms;
 596         struct cifs_fid fid;
 597
 598         if ((*full_path == 0) && tcon->crfid.is_valid)
 599                 return 0;
 600
 601         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
 602         if (!utf16_path)
 603                 return -ENOMEM;
 604
 605         oparms.tcon = tcon;
 606         oparms.desired_access = FILE_READ_ATTRIBUTES;
 607         oparms.disposition = FILE_OPEN;
 608         oparms.create_options = 0;
 609         oparms.fid = &fid;
 610         oparms.reconnect = false;
 611
 612         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
 613         if (rc) {
 614                 kfree(utf16_path);
 615                 return rc;
 616         }
 617
 618         rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 619         kfree(utf16_path);
 620         return rc;
 621 }
 622
 623 static int
 624 smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
 625                   struct cifs_sb_info *cifs_sb, const char *full_path,
 626                   u64 *uniqueid, FILE_ALL_INFO *data)
 627 {
 628         *uniqueid = le64_to_cpu(data->IndexNumber);
 629         return 0;
 630 }
 631
 632 static int
 633 smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
 634                      struct cifs_fid *fid, FILE_ALL_INFO *data)
 635 {
 636         int rc;
 637         struct smb2_file_all_info *smb2_data;
 638
 639         smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
 640                             GFP_KERNEL);
 641         if (smb2_data == NULL)
 642                 return -ENOMEM;
 643
 644         rc = SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid,
 645                              smb2_data);
 646         if (!rc)
 647                 move_smb2_info_to_cifs(data, smb2_data);
 648         kfree(smb2_data);
 649         return rc;
 650 }
 651
 652 #ifdef CONFIG_CIFS_XATTR
 653 static ssize_t
 654 move_smb2_ea_to_cifs(char *dst, size_t dst_size,
 655                      struct smb2_file_full_ea_info *src, size_t src_size,
 656                      const unsigned char *ea_name)
 657 {
 658         int rc = 0;
 659         unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0;
 660         char *name, *value;
 661         size_t name_len, value_len, user_name_len;
 662
 663         while (src_size > 0) {
 664                 name = &src->ea_data[0];
 665                 name_len = (size_t)src->ea_name_length;
 666                 value = &src->ea_data[src->ea_name_length + 1];
 667                 value_len = (size_t)le16_to_cpu(src->ea_value_length);
 668
 669                 if (name_len == 0) {
 670                         break;
 671                 }
 672
 673                 if (src_size < 8 + name_len + 1 + value_len) {
 674                         cifs_dbg(FYI, "EA entry goes beyond length of list\n");
 675                         rc = -EIO;
 676                         goto out;
 677                 }
 678
 679                 if (ea_name) {
 680                         if (ea_name_len == name_len &&
 681                             memcmp(ea_name, name, name_len) == 0) {
 682                                 rc = value_len;
 683                                 if (dst_size == 0)
 684                                         goto out;
 685                                 if (dst_size < value_len) {
 686                                         rc = -ERANGE;
 687                                         goto out;
 688                                 }
 689                                 memcpy(dst, value, value_len);
 690                                 goto out;
 691                         }
 692                 } else {
 693                         /* 'user.' plus a terminating null */
 694                         user_name_len = 5 + 1 + name_len;
 695
 696                         rc += user_name_len;
 697
 698                         if (dst_size >= user_name_len) {
 699                                 dst_size -= user_name_len;
 700                                 memcpy(dst, "user.", 5);
 701                                 dst += 5;
 702                                 memcpy(dst, src->ea_data, name_len);
 703                                 dst += name_len;
 704                                 *dst = 0;
 705                                 ++dst;
 706                         } else if (dst_size == 0) {
 707                                 /* skip copy - calc size only */
 708                         } else {
 709                                 /* stop before overrun buffer */
 710                                 rc = -ERANGE;
 711                                 break;
 712                         }
 713                 }
 714
 715                 if (!src->next_entry_offset)
 716                         break;
 717
 718                 if (src_size < le32_to_cpu(src->next_entry_offset)) {
 719                         /* stop before overrun buffer */
 720                         rc = -ERANGE;
 721                         break;
 722                 }
 723                 src_size -= le32_to_cpu(src->next_entry_offset);
 724                 src = (void *)((char *)src +
 725                                le32_to_cpu(src->next_entry_offset));
 726         }
 727
 728         /* didn't find the named attribute */
 729         if (ea_name)
 730                 rc = -ENODATA;
 731
 732 out:
 733         return (ssize_t)rc;
 734 }
 735
 736 static ssize_t
 737 smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon,
 738                const unsigned char *path, const unsigned char *ea_name,
 739                char *ea_data, size_t buf_size,
 740                struct cifs_sb_info *cifs_sb)
 741 {
 742         int rc;
 743         __le16 *utf16_path;
 744         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 745         struct cifs_open_parms oparms;
 746         struct cifs_fid fid;
 747         struct smb2_file_full_ea_info *smb2_data;
 748         int ea_buf_size = SMB2_MIN_EA_BUF;
 749
 750         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
 751         if (!utf16_path)
 752                 return -ENOMEM;
 753
 754         oparms.tcon = tcon;
 755         oparms.desired_access = FILE_READ_EA;
 756         oparms.disposition = FILE_OPEN;
 757         oparms.create_options = 0;
 758         oparms.fid = &fid;
 759         oparms.reconnect = false;
 760
 761         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
 762         kfree(utf16_path);
 763         if (rc) {
 764                 cifs_dbg(FYI, "open failed rc=%d\n", rc);
 765                 return rc;
 766         }
 767
 768         while (1) {
 769                 smb2_data = kzalloc(ea_buf_size, GFP_KERNEL);
 770                 if (smb2_data == NULL) {
 771                         SMB2_close(xid, tcon, fid.persistent_fid,
 772                                    fid.volatile_fid);
 773                         return -ENOMEM;
 774                 }
 775
 776                 rc = SMB2_query_eas(xid, tcon, fid.persistent_fid,
 777                                     fid.volatile_fid,
 778                                     ea_buf_size, smb2_data);
 779
 780                 if (rc != -E2BIG)
 781                         break;
 782
 783                 kfree(smb2_data);
 784                 ea_buf_size <<= 1;
 785
 786                 if (ea_buf_size > SMB2_MAX_EA_BUF) {
 787                         cifs_dbg(VFS, "EA size is too large\n");
 788                         SMB2_close(xid, tcon, fid.persistent_fid,
 789                                    fid.volatile_fid);
 790                         return -ENOMEM;
 791                 }
 792         }
 793
 794         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 795
 796         /*
 797          * If ea_name is NULL (listxattr) and there are no EAs, return 0 as it's
 798          * not an error. Otherwise, the specified ea_name was not found.
 799          */
 800         if (!rc)
 801                 rc = move_smb2_ea_to_cifs(ea_data, buf_size, smb2_data,
 802                                           SMB2_MAX_EA_BUF, ea_name);
 803         else if (!ea_name && rc == -ENODATA)
 804                 rc = 0;
 805
 806         kfree(smb2_data);
 807         return rc;
 808 }
 809
 810
 811 static int
 812 smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
 813             const char *path, const char *ea_name, const void *ea_value,
 814             const __u16 ea_value_len, const struct nls_table *nls_codepage,
 815             struct cifs_sb_info *cifs_sb)
 816 {
 817         int rc;
 818         __le16 *utf16_path;
 819         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 820         struct cifs_open_parms oparms;
 821         struct cifs_fid fid;
 822         struct smb2_file_full_ea_info *ea;
 823         int ea_name_len = strlen(ea_name);
 824         int len;
 825
 826         if (ea_name_len > 255)
 827                 return -EINVAL;
 828
 829         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
 830         if (!utf16_path)
 831                 return -ENOMEM;
 832
 833         oparms.tcon = tcon;
 834         oparms.desired_access = FILE_WRITE_EA;
 835         oparms.disposition = FILE_OPEN;
 836         oparms.create_options = 0;
 837         oparms.fid = &fid;
 838         oparms.reconnect = false;
 839
 840         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
 841         kfree(utf16_path);
 842         if (rc) {
 843                 cifs_dbg(FYI, "open failed rc=%d\n", rc);
 844                 return rc;
 845         }
 846
 847         len = sizeof(ea) + ea_name_len + ea_value_len + 1;
 848         ea = kzalloc(len, GFP_KERNEL);
 849         if (ea == NULL) {
 850                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 851                 return -ENOMEM;
 852         }
 853
 854         ea->ea_name_length = ea_name_len;
 855         ea->ea_value_length = cpu_to_le16(ea_value_len);
 856         memcpy(ea->ea_data, ea_name, ea_name_len + 1);
 857         memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len);
 858
 859         rc = SMB2_set_ea(xid, tcon, fid.persistent_fid, fid.volatile_fid, ea,
 860                          len);
 861         kfree(ea);
 862
 863         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 864
 865         return rc;
 866 }
 867 #endif
 868
 869 static bool
 870 smb2_can_echo(struct TCP_Server_Info *server)
 871 {
 872         return server->echoes;
 873 }
 874
 875 static void
 876 smb2_clear_stats(struct cifs_tcon *tcon)
 877 {
 878 #ifdef CONFIG_CIFS_STATS
 879         int i;
 880         for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
 881                 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
 882                 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
 883         }
 884 #endif
 885 }
 886
 887 static void
 888 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
 889 {
 890         seq_puts(m, "\n\tShare Capabilities:");
 891         if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
 892                 seq_puts(m, " DFS,");
 893         if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
 894                 seq_puts(m, " CONTINUOUS AVAILABILITY,");
 895         if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
 896                 seq_puts(m, " SCALEOUT,");
 897         if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
 898                 seq_puts(m, " CLUSTER,");
 899         if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
 900                 seq_puts(m, " ASYMMETRIC,");
 901         if (tcon->capabilities == 0)
 902                 seq_puts(m, " None");
 903         if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
 904                 seq_puts(m, " Aligned,");
 905         if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
 906                 seq_puts(m, " Partition Aligned,");
 907         if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
 908                 seq_puts(m, " SSD,");
 909         if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
 910                 seq_puts(m, " TRIM-support,");
 911
 912         seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
 913         seq_printf(m, "\n\ttid: 0x%x", tcon->tid);
 914         if (tcon->perf_sector_size)
 915                 seq_printf(m, "\tOptimal sector size: 0x%x",
 916                            tcon->perf_sector_size);
 917         seq_printf(m, "\tMaximal Access: 0x%x", tcon->maximal_access);
 918 }
 919
 920 static void
 921 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
 922 {
 923 #ifdef CONFIG_CIFS_STATS
 924         atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
 925         atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
 926         seq_printf(m, "\nNegotiates: %d sent %d failed",
 927                    atomic_read(&sent[SMB2_NEGOTIATE_HE]),
 928                    atomic_read(&failed[SMB2_NEGOTIATE_HE]));
 929         seq_printf(m, "\nSessionSetups: %d sent %d failed",
 930                    atomic_read(&sent[SMB2_SESSION_SETUP_HE]),
 931                    atomic_read(&failed[SMB2_SESSION_SETUP_HE]));
 932         seq_printf(m, "\nLogoffs: %d sent %d failed",
 933                    atomic_read(&sent[SMB2_LOGOFF_HE]),
 934                    atomic_read(&failed[SMB2_LOGOFF_HE]));
 935         seq_printf(m, "\nTreeConnects: %d sent %d failed",
 936                    atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
 937                    atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
 938         seq_printf(m, "\nTreeDisconnects: %d sent %d failed",
 939                    atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
 940                    atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
 941         seq_printf(m, "\nCreates: %d sent %d failed",
 942                    atomic_read(&sent[SMB2_CREATE_HE]),
 943                    atomic_read(&failed[SMB2_CREATE_HE]));
 944         seq_printf(m, "\nCloses: %d sent %d failed",
 945                    atomic_read(&sent[SMB2_CLOSE_HE]),
 946                    atomic_read(&failed[SMB2_CLOSE_HE]));
 947         seq_printf(m, "\nFlushes: %d sent %d failed",
 948                    atomic_read(&sent[SMB2_FLUSH_HE]),
 949                    atomic_read(&failed[SMB2_FLUSH_HE]));
 950         seq_printf(m, "\nReads: %d sent %d failed",
 951                    atomic_read(&sent[SMB2_READ_HE]),
 952                    atomic_read(&failed[SMB2_READ_HE]));
 953         seq_printf(m, "\nWrites: %d sent %d failed",
 954                    atomic_read(&sent[SMB2_WRITE_HE]),
 955                    atomic_read(&failed[SMB2_WRITE_HE]));
 956         seq_printf(m, "\nLocks: %d sent %d failed",
 957                    atomic_read(&sent[SMB2_LOCK_HE]),
 958                    atomic_read(&failed[SMB2_LOCK_HE]));
 959         seq_printf(m, "\nIOCTLs: %d sent %d failed",
 960                    atomic_read(&sent[SMB2_IOCTL_HE]),
 961                    atomic_read(&failed[SMB2_IOCTL_HE]));
 962         seq_printf(m, "\nCancels: %d sent %d failed",
 963                    atomic_read(&sent[SMB2_CANCEL_HE]),
 964                    atomic_read(&failed[SMB2_CANCEL_HE]));
 965         seq_printf(m, "\nEchos: %d sent %d failed",
 966                    atomic_read(&sent[SMB2_ECHO_HE]),
 967                    atomic_read(&failed[SMB2_ECHO_HE]));
 968         seq_printf(m, "\nQueryDirectories: %d sent %d failed",
 969                    atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
 970                    atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
 971         seq_printf(m, "\nChangeNotifies: %d sent %d failed",
 972                    atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
 973                    atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
 974         seq_printf(m, "\nQueryInfos: %d sent %d failed",
 975                    atomic_read(&sent[SMB2_QUERY_INFO_HE]),
 976                    atomic_read(&failed[SMB2_QUERY_INFO_HE]));
 977         seq_printf(m, "\nSetInfos: %d sent %d failed",
 978                    atomic_read(&sent[SMB2_SET_INFO_HE]),
 979                    atomic_read(&failed[SMB2_SET_INFO_HE]));
 980         seq_printf(m, "\nOplockBreaks: %d sent %d failed",
 981                    atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
 982                    atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
 983 #endif
 984 }
 985
 986 static void
 987 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
 988 {
 989         struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
 990         struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
 991
 992         cfile->fid.persistent_fid = fid->persistent_fid;
 993         cfile->fid.volatile_fid = fid->volatile_fid;
 994         server->ops->set_oplock_level(cinode, oplock, fid->epoch,
 995                                       &fid->purge_cache);
 996         cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
 997         memcpy(cfile->fid.create_guid, fid->create_guid, 16);
 998 }
 999
1000 static void
1001 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
1002                 struct cifs_fid *fid)
1003 {
1004         SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1005 }
1006
1007 static int
1008 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
1009                      u64 persistent_fid, u64 volatile_fid,
1010                      struct copychunk_ioctl *pcchunk)
1011 {
1012         int rc;
1013         unsigned int ret_data_len;
1014         struct resume_key_req *res_key;
1015
1016         rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
1017                         FSCTL_SRV_REQUEST_RESUME_KEY, true /* is_fsctl */,
1018                         NULL, 0 /* no input */,
1019                         (char **)&res_key, &ret_data_len);
1020
1021         if (rc) {
1022                 cifs_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
1023                 goto req_res_key_exit;
1024         }
1025         if (ret_data_len < sizeof(struct resume_key_req)) {
1026                 cifs_dbg(VFS, "Invalid refcopy resume key length\n");
1027                 rc = -EINVAL;
1028                 goto req_res_key_exit;
1029         }
1030         memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
1031
1032 req_res_key_exit:
1033         kfree(res_key);
1034         return rc;
1035 }
1036
1037 static ssize_t
1038 smb2_copychunk_range(const unsigned int xid,
1039                         struct cifsFileInfo *srcfile,
1040                         struct cifsFileInfo *trgtfile, u64 src_off,
1041                         u64 len, u64 dest_off)
1042 {
1043         int rc;
1044         unsigned int ret_data_len;
1045         struct copychunk_ioctl *pcchunk;
1046         struct copychunk_ioctl_rsp *retbuf = NULL;
1047         struct cifs_tcon *tcon;
1048         int chunks_copied = 0;
1049         bool chunk_sizes_updated = false;
1050         ssize_t bytes_written, total_bytes_written = 0;
1051
1052         pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
1053
1054         if (pcchunk == NULL)
1055                 return -ENOMEM;
1056
1057         cifs_dbg(FYI, "in smb2_copychunk_range - about to call request res key\n");
1058         /* Request a key from the server to identify the source of the copy */
1059         rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
1060                                 srcfile->fid.persistent_fid,
1061                                 srcfile->fid.volatile_fid, pcchunk);
1062
1063         /* Note: request_res_key sets res_key null only if rc !=0 */
1064         if (rc)
1065                 goto cchunk_out;
1066
1067         /* For now array only one chunk long, will make more flexible later */
1068         pcchunk->ChunkCount = cpu_to_le32(1);
1069         pcchunk->Reserved = 0;
1070         pcchunk->Reserved2 = 0;
1071
1072         tcon = tlink_tcon(trgtfile->tlink);
1073
1074         while (len > 0) {
1075                 pcchunk->SourceOffset = cpu_to_le64(src_off);
1076                 pcchunk->TargetOffset = cpu_to_le64(dest_off);
1077                 pcchunk->Length =
1078                         cpu_to_le32(min_t(u32, len, tcon->max_bytes_chunk));
1079
1080                 /* Request server copy to target from src identified by key */
1081                 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1082                         trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
1083                         true /* is_fsctl */, (char *)pcchunk,
1084                         sizeof(struct copychunk_ioctl), (char **)&retbuf,
1085                         &ret_data_len);
1086                 if (rc == 0) {
1087                         if (ret_data_len !=
1088                                         sizeof(struct copychunk_ioctl_rsp)) {
1089                                 cifs_dbg(VFS, "invalid cchunk response size\n");
1090                                 rc = -EIO;
1091                                 goto cchunk_out;
1092                         }
1093                         if (retbuf->TotalBytesWritten == 0) {
1094                                 cifs_dbg(FYI, "no bytes copied\n");
1095                                 rc = -EIO;
1096                                 goto cchunk_out;
1097                         }
1098                         /*
1099                          * Check if server claimed to write more than we asked
1100                          */
1101                         if (le32_to_cpu(retbuf->TotalBytesWritten) >
1102                             le32_to_cpu(pcchunk->Length)) {
1103                                 cifs_dbg(VFS, "invalid copy chunk response\n");
1104                                 rc = -EIO;
1105                                 goto cchunk_out;
1106                         }
1107                         if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
1108                                 cifs_dbg(VFS, "invalid num chunks written\n");
1109                                 rc = -EIO;
1110                                 goto cchunk_out;
1111                         }
1112                         chunks_copied++;
1113
1114                         bytes_written = le32_to_cpu(retbuf->TotalBytesWritten);
1115                         src_off += bytes_written;
1116                         dest_off += bytes_written;
1117                         len -= bytes_written;
1118                         total_bytes_written += bytes_written;
1119
1120                         cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n",
1121                                 le32_to_cpu(retbuf->ChunksWritten),
1122                                 le32_to_cpu(retbuf->ChunkBytesWritten),
1123                                 bytes_written);
1124                 } else if (rc == -EINVAL) {
1125                         if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
1126                                 goto cchunk_out;
1127
1128                         cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
1129                                 le32_to_cpu(retbuf->ChunksWritten),
1130                                 le32_to_cpu(retbuf->ChunkBytesWritten),
1131                                 le32_to_cpu(retbuf->TotalBytesWritten));
1132
1133                         /*
1134                          * Check if this is the first request using these sizes,
1135                          * (ie check if copy succeed once with original sizes
1136                          * and check if the server gave us different sizes after
1137                          * we already updated max sizes on previous request).
1138                          * if not then why is the server returning an error now
1139                          */
1140                         if ((chunks_copied != 0) || chunk_sizes_updated)
1141                                 goto cchunk_out;
1142
1143                         /* Check that server is not asking us to grow size */
1144                         if (le32_to_cpu(retbuf->ChunkBytesWritten) <
1145                                         tcon->max_bytes_chunk)
1146                                 tcon->max_bytes_chunk =
1147                                         le32_to_cpu(retbuf->ChunkBytesWritten);
1148                         else
1149                                 goto cchunk_out; /* server gave us bogus size */
1150
1151                         /* No need to change MaxChunks since already set to 1 */
1152                         chunk_sizes_updated = true;
1153                 } else
1154                         goto cchunk_out;
1155         }
1156
1157 cchunk_out:
1158         kfree(pcchunk);
1159         kfree(retbuf);
1160         if (rc)
1161                 return rc;
1162         else
1163                 return total_bytes_written;
1164 }
1165
1166 static int
1167 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
1168                 struct cifs_fid *fid)
1169 {
1170         return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1171 }
1172
1173 static unsigned int
1174 smb2_read_data_offset(char *buf)
1175 {
1176         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1177         return rsp->DataOffset;
1178 }
1179
1180 static unsigned int
1181 smb2_read_data_length(char *buf, bool in_remaining)
1182 {
1183         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1184
1185         if (in_remaining)
1186                 return le32_to_cpu(rsp->DataRemaining);
1187
1188         return le32_to_cpu(rsp->DataLength);
1189 }
1190
1191
1192 static int
1193 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,
1194                struct cifs_io_parms *parms, unsigned int *bytes_read,
1195                char **buf, int *buf_type)
1196 {
1197         parms->persistent_fid = pfid->persistent_fid;
1198         parms->volatile_fid = pfid->volatile_fid;
1199         return SMB2_read(xid, parms, bytes_read, buf, buf_type);
1200 }
1201
1202 static int
1203 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,
1204                 struct cifs_io_parms *parms, unsigned int *written,
1205                 struct kvec *iov, unsigned long nr_segs)
1206 {
1207
1208         parms->persistent_fid = pfid->persistent_fid;
1209         parms->volatile_fid = pfid->volatile_fid;
1210         return SMB2_write(xid, parms, written, iov, nr_segs);
1211 }
1212
1213 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
1214 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
1215                 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
1216 {
1217         struct cifsInodeInfo *cifsi;
1218         int rc;
1219
1220         cifsi = CIFS_I(inode);
1221
1222         /* if file already sparse don't bother setting sparse again */
1223         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
1224                 return true; /* already sparse */
1225
1226         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
1227                 return true; /* already not sparse */
1228
1229         /*
1230          * Can't check for sparse support on share the usual way via the
1231          * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
1232          * since Samba server doesn't set the flag on the share, yet
1233          * supports the set sparse FSCTL and returns sparse correctly
1234          * in the file attributes. If we fail setting sparse though we
1235          * mark that server does not support sparse files for this share
1236          * to avoid repeatedly sending the unsupported fsctl to server
1237          * if the file is repeatedly extended.
1238          */
1239         if (tcon->broken_sparse_sup)
1240                 return false;
1241
1242         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1243                         cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
1244                         true /* is_fctl */,
1245                         &setsparse, 1, NULL, NULL);
1246         if (rc) {
1247                 tcon->broken_sparse_sup = true;
1248                 cifs_dbg(FYI, "set sparse rc = %d\n", rc);
1249                 return false;
1250         }
1251
1252         if (setsparse)
1253                 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
1254         else
1255                 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
1256
1257         return true;
1258 }
1259
1260 static int
1261 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
1262                    struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
1263 {
1264         __le64 eof = cpu_to_le64(size);
1265         struct inode *inode;
1266
1267         /*
1268          * If extending file more than one page make sparse. Many Linux fs
1269          * make files sparse by default when extending via ftruncate
1270          */
1271         inode = d_inode(cfile->dentry);
1272
1273         if (!set_alloc && (size > inode->i_size + 8192)) {
1274                 __u8 set_sparse = 1;
1275
1276                 /* whether set sparse succeeds or not, extend the file */
1277                 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
1278         }
1279
1280         return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
1281                             cfile->fid.volatile_fid, cfile->pid, &eof, false);
1282 }
1283
1284 static int
1285 smb2_duplicate_extents(const unsigned int xid,
1286                         struct cifsFileInfo *srcfile,
1287                         struct cifsFileInfo *trgtfile, u64 src_off,
1288                         u64 len, u64 dest_off)
1289 {
1290         int rc;
1291         unsigned int ret_data_len;
1292         struct duplicate_extents_to_file dup_ext_buf;
1293         struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink);
1294
1295         /* server fileays advertise duplicate extent support with this flag */
1296         if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) &
1297              FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0)
1298                 return -EOPNOTSUPP;
1299
1300         dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid;
1301         dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid;
1302         dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off);
1303         dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off);
1304         dup_ext_buf.ByteCount = cpu_to_le64(len);
1305         cifs_dbg(FYI, "duplicate extents: src off %lld dst off %lld len %lld",
1306                 src_off, dest_off, len);
1307
1308         rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false);
1309         if (rc)
1310                 goto duplicate_extents_out;
1311
1312         rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1313                         trgtfile->fid.volatile_fid,
1314                         FSCTL_DUPLICATE_EXTENTS_TO_FILE,
1315                         true /* is_fsctl */,
1316                         (char *)&dup_ext_buf,
1317                         sizeof(struct duplicate_extents_to_file),
1318                         NULL,
1319                         &ret_data_len);
1320
1321         if (ret_data_len > 0)
1322                 cifs_dbg(FYI, "non-zero response length in duplicate extents");
1323
1324 duplicate_extents_out:
1325         return rc;
1326 }
1327
1328 static int
1329 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
1330                    struct cifsFileInfo *cfile)
1331 {
1332         return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
1333                             cfile->fid.volatile_fid);
1334 }
1335
1336 static int
1337 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
1338                    struct cifsFileInfo *cfile)
1339 {
1340         struct fsctl_set_integrity_information_req integr_info;
1341         unsigned int ret_data_len;
1342
1343         integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED);
1344         integr_info.Flags = 0;
1345         integr_info.Reserved = 0;
1346
1347         return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1348                         cfile->fid.volatile_fid,
1349                         FSCTL_SET_INTEGRITY_INFORMATION,
1350                         true /* is_fsctl */,
1351                         (char *)&integr_info,
1352                         sizeof(struct fsctl_set_integrity_information_req),
1353                         NULL,
1354                         &ret_data_len);
1355
1356 }
1357
1358 static int
1359 smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon,
1360                    struct cifsFileInfo *cfile, void __user *ioc_buf)
1361 {
1362         char *retbuf = NULL;
1363         unsigned int ret_data_len = 0;
1364         int rc;
1365         struct smb_snapshot_array snapshot_in;
1366
1367         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1368                         cfile->fid.volatile_fid,
1369                         FSCTL_SRV_ENUMERATE_SNAPSHOTS,
1370                         true /* is_fsctl */,
1371                         NULL, 0 /* no input data */,
1372                         (char **)&retbuf,
1373                         &ret_data_len);
1374         cifs_dbg(FYI, "enum snaphots ioctl returned %d and ret buflen is %d\n",
1375                         rc, ret_data_len);
1376         if (rc)
1377                 return rc;
1378
1379         if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) {
1380                 /* Fixup buffer */
1381                 if (copy_from_user(&snapshot_in, ioc_buf,
1382                     sizeof(struct smb_snapshot_array))) {
1383                         rc = -EFAULT;
1384                         kfree(retbuf);
1385                         return rc;
1386                 }
1387                 if (snapshot_in.snapshot_array_size < sizeof(struct smb_snapshot_array)) {
1388                         rc = -ERANGE;
1389                         kfree(retbuf);
1390                         return rc;
1391                 }
1392
1393                 if (ret_data_len > snapshot_in.snapshot_array_size)
1394                         ret_data_len = snapshot_in.snapshot_array_size;
1395
1396                 if (copy_to_user(ioc_buf, retbuf, ret_data_len))
1397                         rc = -EFAULT;
1398         }
1399
1400         kfree(retbuf);
1401         return rc;
1402 }
1403
1404 static int
1405 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
1406                      const char *path, struct cifs_sb_info *cifs_sb,
1407                      struct cifs_fid *fid, __u16 search_flags,
1408                      struct cifs_search_info *srch_inf)
1409 {
1410         __le16 *utf16_path;
1411         int rc;
1412         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1413         struct cifs_open_parms oparms;
1414
1415         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1416         if (!utf16_path)
1417                 return -ENOMEM;
1418
1419         oparms.tcon = tcon;
1420         oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
1421         oparms.disposition = FILE_OPEN;
1422         oparms.create_options = 0;
1423         oparms.fid = fid;
1424         oparms.reconnect = false;
1425
1426         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
1427         kfree(utf16_path);
1428         if (rc) {
1429                 cifs_dbg(FYI, "open dir failed rc=%d\n", rc);
1430                 return rc;
1431         }
1432
1433         srch_inf->entries_in_buffer = 0;
1434         srch_inf->index_of_last_entry = 0;
1435
1436         rc = SMB2_query_directory(xid, tcon, fid->persistent_fid,
1437                                   fid->volatile_fid, 0, srch_inf);
1438         if (rc) {
1439                 cifs_dbg(FYI, "query directory failed rc=%d\n", rc);
1440                 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1441         }
1442         return rc;
1443 }
1444
1445 static int
1446 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
1447                     struct cifs_fid *fid, __u16 search_flags,
1448                     struct cifs_search_info *srch_inf)
1449 {
1450         return SMB2_query_directory(xid, tcon, fid->persistent_fid,
1451                                     fid->volatile_fid, 0, srch_inf);
1452 }
1453
1454 static int
1455 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
1456                struct cifs_fid *fid)
1457 {
1458         return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1459 }
1460
1461 /*
1462 * If we negotiate SMB2 protocol and get STATUS_PENDING - update
1463 * the number of credits and return true. Otherwise - return false.
1464 */
1465 static bool
1466 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server, int length)
1467 {
1468         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
1469
1470         if (shdr->Status != STATUS_PENDING)
1471                 return false;
1472
1473         if (!length) {
1474                 spin_lock(&server->req_lock);
1475                 server->credits += le16_to_cpu(shdr->CreditRequest);
1476                 spin_unlock(&server->req_lock);
1477                 wake_up(&server->request_q);
1478         }
1479
1480         return true;
1481 }
1482
1483 static bool
1484 smb2_is_session_expired(char *buf)
1485 {
1486         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
1487
1488         if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED &&
1489             shdr->Status != STATUS_USER_SESSION_DELETED)
1490                 return false;
1491
1492         cifs_dbg(FYI, "Session expired or deleted\n");
1493         return true;
1494 }
1495
1496 static int
1497 smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
1498                      struct cifsInodeInfo *cinode)
1499 {
1500         if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
1501                 return SMB2_lease_break(0, tcon, cinode->lease_key,
1502                                         smb2_get_lease_state(cinode));
1503
1504         return SMB2_oplock_break(0, tcon, fid->persistent_fid,
1505                                  fid->volatile_fid,
1506                                  CIFS_CACHE_READ(cinode) ? 1 : 0);
1507 }
1508
1509 static int
1510 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
1511              struct kstatfs *buf)
1512 {
1513         int rc;
1514         __le16 srch_path = 0; /* Null - open root of share */
1515         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1516         struct cifs_open_parms oparms;
1517         struct cifs_fid fid;
1518
1519         oparms.tcon = tcon;
1520         oparms.desired_access = FILE_READ_ATTRIBUTES;
1521         oparms.disposition = FILE_OPEN;
1522         oparms.create_options = 0;
1523         oparms.fid = &fid;
1524         oparms.reconnect = false;
1525
1526         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, NULL);
1527         if (rc)
1528                 return rc;
1529         buf->f_type = SMB2_MAGIC_NUMBER;
1530         rc = SMB2_QFS_info(xid, tcon, fid.persistent_fid, fid.volatile_fid,
1531                            buf);
1532         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
1533         return rc;
1534 }
1535
1536 static bool
1537 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
1538 {
1539         return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
1540                ob1->fid.volatile_fid == ob2->fid.volatile_fid;
1541 }
1542
1543 static int
1544 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
1545                __u64 length, __u32 type, int lock, int unlock, bool wait)
1546 {
1547         if (unlock && !lock)
1548                 type = SMB2_LOCKFLAG_UNLOCK;
1549         return SMB2_lock(xid, tlink_tcon(cfile->tlink),
1550                          cfile->fid.persistent_fid, cfile->fid.volatile_fid,
1551                          current->tgid, length, offset, type, wait);
1552 }
1553
1554 static void
1555 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
1556 {
1557         memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
1558 }
1559
1560 static void
1561 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
1562 {
1563         memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
1564 }
1565
1566 static void
1567 smb2_new_lease_key(struct cifs_fid *fid)
1568 {
1569         generate_random_uuid(fid->lease_key);
1570 }
1571
1572 static int
1573 smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,
1574                    const char *search_name,
1575                    struct dfs_info3_param **target_nodes,
1576                    unsigned int *num_of_nodes,
1577                    const struct nls_table *nls_codepage, int remap)
1578 {
1579         int rc;
1580         __le16 *utf16_path = NULL;
1581         int utf16_path_len = 0;
1582         struct cifs_tcon *tcon;
1583         struct fsctl_get_dfs_referral_req *dfs_req = NULL;
1584         struct get_dfs_referral_rsp *dfs_rsp = NULL;
1585         u32 dfs_req_size = 0, dfs_rsp_size = 0;
1586
1587         cifs_dbg(FYI, "smb2_get_dfs_refer path <%s>\n", search_name);
1588
1589         /*
1590          * Try to use the IPC tcon, otherwise just use any
1591          */
1592         tcon = ses->tcon_ipc;
1593         if (tcon == NULL) {
1594                 spin_lock(&cifs_tcp_ses_lock);
1595                 tcon = list_first_entry_or_null(&ses->tcon_list,
1596                                                 struct cifs_tcon,
1597                                                 tcon_list);
1598                 if (tcon)
1599                         tcon->tc_count++;
1600                 spin_unlock(&cifs_tcp_ses_lock);
1601         }
1602
1603         if (tcon == NULL) {
1604                 cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n",
1605                          ses);
1606                 rc = -ENOTCONN;
1607                 goto out;
1608         }
1609
1610         utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX,
1611                                            &utf16_path_len,
1612                                            nls_codepage, remap);
1613         if (!utf16_path) {
1614                 rc = -ENOMEM;
1615                 goto out;
1616         }
1617
1618         dfs_req_size = sizeof(*dfs_req) + utf16_path_len;
1619         dfs_req = kzalloc(dfs_req_size, GFP_KERNEL);
1620         if (!dfs_req) {
1621                 rc = -ENOMEM;
1622                 goto out;
1623         }
1624
1625         /* Highest DFS referral version understood */
1626         dfs_req->MaxReferralLevel = DFS_VERSION;
1627
1628         /* Path to resolve in an UTF-16 null-terminated string */
1629         memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len);
1630
1631         do {
1632                 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
1633                                 FSCTL_DFS_GET_REFERRALS,
1634                                 true /* is_fsctl */,
1635                                 (char *)dfs_req, dfs_req_size,
1636                                 (char **)&dfs_rsp, &dfs_rsp_size);
1637         } while (rc == -EAGAIN);
1638
1639         if (rc) {
1640                 if ((rc != -ENOENT) && (rc != -EOPNOTSUPP))
1641                         cifs_dbg(VFS, "ioctl error in smb2_get_dfs_refer rc=%d\n", rc);
1642                 goto out;
1643         }
1644
1645         rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size,
1646                                  num_of_nodes, target_nodes,
1647                                  nls_codepage, remap, search_name,
1648                                  true /* is_unicode */);
1649         if (rc) {
1650                 cifs_dbg(VFS, "parse error in smb2_get_dfs_refer rc=%d\n", rc);
1651                 goto out;
1652         }
1653
1654  out:
1655         if (tcon && !tcon->ipc) {
1656                 /* ipc tcons are not refcounted */
1657                 spin_lock(&cifs_tcp_ses_lock);
1658                 tcon->tc_count--;
1659                 spin_unlock(&cifs_tcp_ses_lock);
1660         }
1661         kfree(utf16_path);
1662         kfree(dfs_req);
1663         kfree(dfs_rsp);
1664         return rc;
1665 }
1666 #define SMB2_SYMLINK_STRUCT_SIZE \
1667         (sizeof(struct smb2_err_rsp) - 1 + sizeof(struct smb2_symlink_err_rsp))
1668
1669 static int
1670 smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
1671                    const char *full_path, char **target_path,
1672                    struct cifs_sb_info *cifs_sb)
1673 {
1674         int rc;
1675         __le16 *utf16_path;
1676         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1677         struct cifs_open_parms oparms;
1678         struct cifs_fid fid;
1679         struct kvec err_iov = {NULL, 0};
1680         struct smb2_err_rsp *err_buf = NULL;
1681         int resp_buftype;
1682         struct smb2_symlink_err_rsp *symlink;
1683         unsigned int sub_len;
1684         unsigned int sub_offset;
1685         unsigned int print_len;
1686         unsigned int print_offset;
1687
1688         cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
1689
1690         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
1691         if (!utf16_path)
1692                 return -ENOMEM;
1693
1694         oparms.tcon = tcon;
1695         oparms.desired_access = FILE_READ_ATTRIBUTES;
1696         oparms.disposition = FILE_OPEN;
1697         oparms.create_options = 0;
1698         oparms.fid = &fid;
1699         oparms.reconnect = false;
1700
1701         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, &err_iov,
1702                        &resp_buftype);
1703         if (!rc || !err_iov.iov_base) {
1704                 rc = -ENOENT;
1705                 goto free_path;
1706         }
1707
1708         err_buf = err_iov.iov_base;
1709         if (le32_to_cpu(err_buf->ByteCount) < sizeof(struct smb2_symlink_err_rsp) ||
1710             err_iov.iov_len < SMB2_SYMLINK_STRUCT_SIZE) {
1711                 rc = -ENOENT;
1712                 goto querty_exit;
1713         }
1714
1715         /* open must fail on symlink - reset rc */
1716         rc = 0;
1717         symlink = (struct smb2_symlink_err_rsp *)err_buf->ErrorData;
1718         sub_len = le16_to_cpu(symlink->SubstituteNameLength);
1719         sub_offset = le16_to_cpu(symlink->SubstituteNameOffset);
1720         print_len = le16_to_cpu(symlink->PrintNameLength);
1721         print_offset = le16_to_cpu(symlink->PrintNameOffset);
1722
1723         if (err_iov.iov_len < SMB2_SYMLINK_STRUCT_SIZE + sub_offset + sub_len) {
1724                 rc = -ENOENT;
1725                 goto querty_exit;
1726         }
1727
1728         if (err_iov.iov_len <
1729             SMB2_SYMLINK_STRUCT_SIZE + print_offset + print_len) {
1730                 rc = -ENOENT;
1731                 goto querty_exit;
1732         }
1733
1734         *target_path = cifs_strndup_from_utf16(
1735                                 (char *)symlink->PathBuffer + sub_offset,
1736                                 sub_len, true, cifs_sb->local_nls);
1737         if (!(*target_path)) {
1738                 rc = -ENOMEM;
1739                 goto querty_exit;
1740         }
1741         convert_delimiter(*target_path, '/');
1742         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
1743
1744  querty_exit:
1745         free_rsp_buf(resp_buftype, err_buf);
1746  free_path:
1747         kfree(utf16_path);
1748         return rc;
1749 }
1750
1751 #ifdef CONFIG_CIFS_ACL
1752 static struct cifs_ntsd *
1753 get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb,
1754                 const struct cifs_fid *cifsfid, u32 *pacllen)
1755 {
1756         struct cifs_ntsd *pntsd = NULL;
1757         unsigned int xid;
1758         int rc = -EOPNOTSUPP;
1759         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
1760
1761         if (IS_ERR(tlink))
1762                 return ERR_CAST(tlink);
1763
1764         xid = get_xid();
1765         cifs_dbg(FYI, "trying to get acl\n");
1766
1767         rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid,
1768                             cifsfid->volatile_fid, (void **)&pntsd, pacllen);
1769         free_xid(xid);
1770
1771         cifs_put_tlink(tlink);
1772
1773         cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
1774         if (rc)
1775                 return ERR_PTR(rc);
1776         return pntsd;
1777
1778 }
1779
1780 static struct cifs_ntsd *
1781 get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb,
1782                 const char *path, u32 *pacllen)
1783 {
1784         struct cifs_ntsd *pntsd = NULL;
1785         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1786         unsigned int xid;
1787         int rc;
1788         struct cifs_tcon *tcon;
1789         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
1790         struct cifs_fid fid;
1791         struct cifs_open_parms oparms;
1792         __le16 *utf16_path;
1793
1794         cifs_dbg(FYI, "get smb3 acl for path %s\n", path);
1795         if (IS_ERR(tlink))
1796                 return ERR_CAST(tlink);
1797
1798         tcon = tlink_tcon(tlink);
1799         xid = get_xid();
1800
1801         if (backup_cred(cifs_sb))
1802                 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
1803         else
1804                 oparms.create_options = 0;
1805
1806         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1807         if (!utf16_path) {
1808                 rc = -ENOMEM;
1809                 free_xid(xid);
1810                 return ERR_PTR(rc);
1811         }
1812
1813         oparms.tcon = tcon;
1814         oparms.desired_access = READ_CONTROL;
1815         oparms.disposition = FILE_OPEN;
1816         oparms.fid = &fid;
1817         oparms.reconnect = false;
1818
1819         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
1820         kfree(utf16_path);
1821         if (!rc) {
1822                 rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
1823                             fid.volatile_fid, (void **)&pntsd, pacllen);
1824                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
1825         }
1826
1827         cifs_put_tlink(tlink);
1828         free_xid(xid);
1829
1830         cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
1831         if (rc)
1832                 return ERR_PTR(rc);
1833         return pntsd;
1834 }
1835
1836 #ifdef CONFIG_CIFS_ACL
1837 static int
1838 set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen,
1839                 struct inode *inode, const char *path, int aclflag)
1840 {
1841         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1842         unsigned int xid;
1843         int rc, access_flags = 0;
1844         struct cifs_tcon *tcon;
1845         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1846         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
1847         struct cifs_fid fid;
1848         struct cifs_open_parms oparms;
1849         __le16 *utf16_path;
1850
1851         cifs_dbg(FYI, "set smb3 acl for path %s\n", path);
1852         if (IS_ERR(tlink))
1853                 return PTR_ERR(tlink);
1854
1855         tcon = tlink_tcon(tlink);
1856         xid = get_xid();
1857
1858         if (backup_cred(cifs_sb))
1859                 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
1860         else
1861                 oparms.create_options = 0;
1862
1863         if (aclflag == CIFS_ACL_OWNER || aclflag == CIFS_ACL_GROUP)
1864                 access_flags = WRITE_OWNER;
1865         else
1866                 access_flags = WRITE_DAC;
1867
1868         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1869         if (!utf16_path) {
1870                 rc = -ENOMEM;
1871                 free_xid(xid);
1872                 return rc;
1873         }
1874
1875         oparms.tcon = tcon;
1876         oparms.desired_access = access_flags;
1877         oparms.disposition = FILE_OPEN;
1878         oparms.path = path;
1879         oparms.fid = &fid;
1880         oparms.reconnect = false;
1881
1882         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
1883         kfree(utf16_path);
1884         if (!rc) {
1885                 rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
1886                             fid.volatile_fid, pnntsd, acllen, aclflag);
1887                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
1888         }
1889
1890         cifs_put_tlink(tlink);
1891         free_xid(xid);
1892         return rc;
1893 }
1894 #endif /* CIFS_ACL */
1895
1896 /* Retrieve an ACL from the server */
1897 static struct cifs_ntsd *
1898 get_smb2_acl(struct cifs_sb_info *cifs_sb,
1899                                       struct inode *inode, const char *path,
1900                                       u32 *pacllen)
1901 {
1902         struct cifs_ntsd *pntsd = NULL;
1903         struct cifsFileInfo *open_file = NULL;
1904
1905         if (inode)
1906                 open_file = find_readable_file(CIFS_I(inode), true);
1907         if (!open_file)
1908                 return get_smb2_acl_by_path(cifs_sb, path, pacllen);
1909
1910         pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen);
1911         cifsFileInfo_put(open_file);
1912         return pntsd;
1913 }
1914 #endif
1915
1916 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
1917                             loff_t offset, loff_t len, bool keep_size)
1918 {
1919         struct inode *inode;
1920         struct cifsInodeInfo *cifsi;
1921         struct cifsFileInfo *cfile = file->private_data;
1922         struct file_zero_data_information fsctl_buf;
1923         long rc;
1924         unsigned int xid;
1925
1926         xid = get_xid();
1927
1928         inode = d_inode(cfile->dentry);
1929         cifsi = CIFS_I(inode);
1930
1931         /* if file not oplocked can't be sure whether asking to extend size */
1932         if (!CIFS_CACHE_READ(cifsi))
1933                 if (keep_size == false) {
1934                         rc = -EOPNOTSUPP;
1935                         free_xid(xid);
1936                         return rc;
1937                 }
1938
1939         /*
1940          * Must check if file sparse since fallocate -z (zero range) assumes
1941          * non-sparse allocation
1942          */
1943         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) {
1944                 rc = -EOPNOTSUPP;
1945                 free_xid(xid);
1946                 return rc;
1947         }
1948
1949         /*
1950          * need to make sure we are not asked to extend the file since the SMB3
1951          * fsctl does not change the file size. In the future we could change
1952          * this to zero the first part of the range then set the file size
1953          * which for a non sparse file would zero the newly extended range
1954          */
1955         if (keep_size == false)
1956                 if (i_size_read(inode) < offset + len) {
1957                         rc = -EOPNOTSUPP;
1958                         free_xid(xid);
1959                         return rc;
1960                 }
1961
1962         cifs_dbg(FYI, "offset %lld len %lld", offset, len);
1963
1964         fsctl_buf.FileOffset = cpu_to_le64(offset);
1965         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
1966
1967         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1968                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
1969                         true /* is_fctl */, (char *)&fsctl_buf,
1970                         sizeof(struct file_zero_data_information), NULL, NULL);
1971         free_xid(xid);
1972         return rc;
1973 }
1974
1975 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
1976                             loff_t offset, loff_t len)
1977 {
1978         struct inode *inode;
1979         struct cifsInodeInfo *cifsi;
1980         struct cifsFileInfo *cfile = file->private_data;
1981         struct file_zero_data_information fsctl_buf;
1982         long rc;
1983         unsigned int xid;
1984         __u8 set_sparse = 1;
1985
1986         xid = get_xid();
1987
1988         inode = d_inode(cfile->dentry);
1989         cifsi = CIFS_I(inode);
1990
1991         /* Need to make file sparse, if not already, before freeing range. */
1992         /* Consider adding equivalent for compressed since it could also work */
1993         if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse)) {
1994                 rc = -EOPNOTSUPP;
1995                 free_xid(xid);
1996                 return rc;
1997         }
1998
1999         cifs_dbg(FYI, "offset %lld len %lld", offset, len);
2000
2001         fsctl_buf.FileOffset = cpu_to_le64(offset);
2002         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
2003
2004         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2005                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
2006                         true /* is_fctl */, (char *)&fsctl_buf,
2007                         sizeof(struct file_zero_data_information), NULL, NULL);
2008         free_xid(xid);
2009         return rc;
2010 }
2011
2012 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
2013                             loff_t off, loff_t len, bool keep_size)
2014 {
2015         struct inode *inode;
2016         struct cifsInodeInfo *cifsi;
2017         struct cifsFileInfo *cfile = file->private_data;
2018         long rc = -EOPNOTSUPP;
2019         unsigned int xid;
2020
2021         xid = get_xid();
2022
2023         inode = d_inode(cfile->dentry);
2024         cifsi = CIFS_I(inode);
2025
2026         /* if file not oplocked can't be sure whether asking to extend size */
2027         if (!CIFS_CACHE_READ(cifsi))
2028                 if (keep_size == false) {
2029                         free_xid(xid);
2030                         return rc;
2031                 }
2032
2033         /*
2034          * Files are non-sparse by default so falloc may be a no-op
2035          * Must check if file sparse. If not sparse, and not extending
2036          * then no need to do anything since file already allocated
2037          */
2038         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
2039                 if (keep_size == true)
2040                         rc = 0;
2041                 /* check if extending file */
2042                 else if (i_size_read(inode) >= off + len)
2043                         /* not extending file and already not sparse */
2044                         rc = 0;
2045                 /* BB: in future add else clause to extend file */
2046                 else
2047                         rc = -EOPNOTSUPP;
2048                 free_xid(xid);
2049                 return rc;
2050         }
2051
2052         if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
2053                 /*
2054                  * Check if falloc starts within first few pages of file
2055                  * and ends within a few pages of the end of file to
2056                  * ensure that most of file is being forced to be
2057                  * fallocated now. If so then setting whole file sparse
2058                  * ie potentially making a few extra pages at the beginning
2059                  * or end of the file non-sparse via set_sparse is harmless.
2060                  */
2061                 if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) {
2062                         rc = -EOPNOTSUPP;
2063                         free_xid(xid);
2064                         return rc;
2065                 }
2066
2067                 rc = smb2_set_sparse(xid, tcon, cfile, inode, false);
2068         }
2069         /* BB: else ... in future add code to extend file and set sparse */
2070
2071
2072         free_xid(xid);
2073         return rc;
2074 }
2075
2076
2077 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
2078                            loff_t off, loff_t len)
2079 {
2080         /* KEEP_SIZE already checked for by do_fallocate */
2081         if (mode & FALLOC_FL_PUNCH_HOLE)
2082                 return smb3_punch_hole(file, tcon, off, len);
2083         else if (mode & FALLOC_FL_ZERO_RANGE) {
2084                 if (mode & FALLOC_FL_KEEP_SIZE)
2085                         return smb3_zero_range(file, tcon, off, len, true);
2086                 return smb3_zero_range(file, tcon, off, len, false);
2087         } else if (mode == FALLOC_FL_KEEP_SIZE)
2088                 return smb3_simple_falloc(file, tcon, off, len, true);
2089         else if (mode == 0)
2090                 return smb3_simple_falloc(file, tcon, off, len, false);
2091
2092         return -EOPNOTSUPP;
2093 }
2094
2095 static void
2096 smb2_downgrade_oplock(struct TCP_Server_Info *server,
2097                         struct cifsInodeInfo *cinode, bool set_level2)
2098 {
2099         if (set_level2)
2100                 server->ops->set_oplock_level(cinode, SMB2_OPLOCK_LEVEL_II,
2101                                                 0, NULL);
2102         else
2103                 server->ops->set_oplock_level(cinode, 0, 0, NULL);
2104 }
2105
2106 static void
2107 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
2108                       unsigned int epoch, bool *purge_cache)
2109 {
2110         oplock &= 0xFF;
2111         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
2112                 return;
2113         if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
2114                 cinode->oplock = CIFS_CACHE_RHW_FLG;
2115                 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
2116                          &cinode->vfs_inode);
2117         } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
2118                 cinode->oplock = CIFS_CACHE_RW_FLG;
2119                 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
2120                          &cinode->vfs_inode);
2121         } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
2122                 cinode->oplock = CIFS_CACHE_READ_FLG;
2123                 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
2124                          &cinode->vfs_inode);
2125         } else
2126                 cinode->oplock = 0;
2127 }
2128
2129 static void
2130 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
2131                        unsigned int epoch, bool *purge_cache)
2132 {
2133         char message[5] = {0};
2134
2135         oplock &= 0xFF;
2136         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
2137                 return;
2138
2139         cinode->oplock = 0;
2140         if (oplock & SMB2_LEASE_READ_CACHING_HE) {
2141                 cinode->oplock |= CIFS_CACHE_READ_FLG;
2142                 strcat(message, "R");
2143         }
2144         if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
2145                 cinode->oplock |= CIFS_CACHE_HANDLE_FLG;
2146                 strcat(message, "H");
2147         }
2148         if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
2149                 cinode->oplock |= CIFS_CACHE_WRITE_FLG;
2150                 strcat(message, "W");
2151         }
2152         if (!cinode->oplock)
2153                 strcat(message, "None");
2154         cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
2155                  &cinode->vfs_inode);
2156 }
2157
2158 static void
2159 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
2160                       unsigned int epoch, bool *purge_cache)
2161 {
2162         unsigned int old_oplock = cinode->oplock;
2163
2164         smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
2165
2166         if (purge_cache) {
2167                 *purge_cache = false;
2168                 if (old_oplock == CIFS_CACHE_READ_FLG) {
2169                         if (cinode->oplock == CIFS_CACHE_READ_FLG &&
2170                             (epoch - cinode->epoch > 0))
2171                                 *purge_cache = true;
2172                         else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
2173                                  (epoch - cinode->epoch > 1))
2174                                 *purge_cache = true;
2175                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
2176                                  (epoch - cinode->epoch > 1))
2177                                 *purge_cache = true;
2178                         else if (cinode->oplock == 0 &&
2179                                  (epoch - cinode->epoch > 0))
2180                                 *purge_cache = true;
2181                 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
2182                         if (cinode->oplock == CIFS_CACHE_RH_FLG &&
2183                             (epoch - cinode->epoch > 0))
2184                                 *purge_cache = true;
2185                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
2186                                  (epoch - cinode->epoch > 1))
2187                                 *purge_cache = true;
2188                 }
2189                 cinode->epoch = epoch;
2190         }
2191 }
2192
2193 static bool
2194 smb2_is_read_op(__u32 oplock)
2195 {
2196         return oplock == SMB2_OPLOCK_LEVEL_II;
2197 }
2198
2199 static bool
2200 smb21_is_read_op(__u32 oplock)
2201 {
2202         return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
2203                !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
2204 }
2205
2206 static __le32
2207 map_oplock_to_lease(u8 oplock)
2208 {
2209         if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
2210                 return SMB2_LEASE_WRITE_CACHING | SMB2_LEASE_READ_CACHING;
2211         else if (oplock == SMB2_OPLOCK_LEVEL_II)
2212                 return SMB2_LEASE_READ_CACHING;
2213         else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
2214                 return SMB2_LEASE_HANDLE_CACHING | SMB2_LEASE_READ_CACHING |
2215                        SMB2_LEASE_WRITE_CACHING;
2216         return 0;
2217 }
2218
2219 static char *
2220 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
2221 {
2222         struct create_lease *buf;
2223
2224         buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
2225         if (!buf)
2226                 return NULL;
2227
2228         memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
2229         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
2230
2231         buf->ccontext.DataOffset = cpu_to_le16(offsetof
2232                                         (struct create_lease, lcontext));
2233         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
2234         buf->ccontext.NameOffset = cpu_to_le16(offsetof
2235                                 (struct create_lease, Name));
2236         buf->ccontext.NameLength = cpu_to_le16(4);
2237         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
2238         buf->Name[0] = 'R';
2239         buf->Name[1] = 'q';
2240         buf->Name[2] = 'L';
2241         buf->Name[3] = 's';
2242         return (char *)buf;
2243 }
2244
2245 static char *
2246 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
2247 {
2248         struct create_lease_v2 *buf;
2249
2250         buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
2251         if (!buf)
2252                 return NULL;
2253
2254         memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
2255         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
2256
2257         buf->ccontext.DataOffset = cpu_to_le16(offsetof
2258                                         (struct create_lease_v2, lcontext));
2259         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
2260         buf->ccontext.NameOffset = cpu_to_le16(offsetof
2261                                 (struct create_lease_v2, Name));
2262         buf->ccontext.NameLength = cpu_to_le16(4);
2263         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
2264         buf->Name[0] = 'R';
2265         buf->Name[1] = 'q';
2266         buf->Name[2] = 'L';
2267         buf->Name[3] = 's';
2268         return (char *)buf;
2269 }
2270
2271 static __u8
2272 smb2_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
2273 {
2274         struct create_lease *lc = (struct create_lease *)buf;
2275
2276         *epoch = 0; /* not used */
2277         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
2278                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
2279         return le32_to_cpu(lc->lcontext.LeaseState);
2280 }
2281
2282 static __u8
2283 smb3_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
2284 {
2285         struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
2286
2287         *epoch = le16_to_cpu(lc->lcontext.Epoch);
2288         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
2289                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
2290         if (lease_key)
2291                 memcpy(lease_key, &lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE);
2292         return le32_to_cpu(lc->lcontext.LeaseState);
2293 }
2294
2295 static unsigned int
2296 smb2_wp_retry_size(struct inode *inode)
2297 {
2298         return min_t(unsigned int, CIFS_SB(inode->i_sb)->wsize,
2299                      SMB2_MAX_BUFFER_SIZE);
2300 }
2301
2302 static bool
2303 smb2_dir_needs_close(struct cifsFileInfo *cfile)
2304 {
2305         return !cfile->invalidHandle;
2306 }
2307
2308 static void
2309 fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len,
2310                    struct smb_rqst *old_rq)
2311 {
2312         struct smb2_sync_hdr *shdr =
2313                         (struct smb2_sync_hdr *)old_rq->rq_iov[0].iov_base;
2314
2315         memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr));
2316         tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
2317         tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
2318         tr_hdr->Flags = cpu_to_le16(0x01);
2319         get_random_bytes(&tr_hdr->Nonce, SMB3_AES128CMM_NONCE);
2320         memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8);
2321 }
2322
2323 /* We can not use the normal sg_set_buf() as we will sometimes pass a
2324  * stack object as buf.
2325  */
2326 static inline void smb2_sg_set_buf(struct scatterlist *sg, const void *buf,
2327                                    unsigned int buflen)
2328 {
2329         sg_set_page(sg, virt_to_page(buf), buflen, offset_in_page(buf));
2330 }
2331
2332 /* Assumes:
2333  * rqst->rq_iov[0]  is transform header
2334  * rqst->rq_iov[1+] data to be encrypted/decrypted
2335  */
2336 static struct scatterlist *
2337 init_sg(struct smb_rqst *rqst, u8 *sign)
2338 {
2339         unsigned int sg_len = rqst->rq_nvec + rqst->rq_npages + 1;
2340         unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20;
2341         struct scatterlist *sg;
2342         unsigned int i;
2343         unsigned int j;
2344
2345         sg = kmalloc_array(sg_len, sizeof(struct scatterlist), GFP_KERNEL);
2346         if (!sg)
2347                 return NULL;
2348
2349         sg_init_table(sg, sg_len);
2350         smb2_sg_set_buf(&sg[0], rqst->rq_iov[0].iov_base + 20, assoc_data_len);
2351         for (i = 1; i < rqst->rq_nvec; i++)
2352                 smb2_sg_set_buf(&sg[i], rqst->rq_iov[i].iov_base,
2353                                                 rqst->rq_iov[i].iov_len);
2354         for (j = 0; i < sg_len - 1; i++, j++) {
2355                 unsigned int len, offset;
2356
2357                 rqst_page_get_length(rqst, j, &len, &offset);
2358                 sg_set_page(&sg[i], rqst->rq_pages[j], len, offset);
2359         }
2360         smb2_sg_set_buf(&sg[sg_len - 1], sign, SMB2_SIGNATURE_SIZE);
2361         return sg;
2362 }
2363
2364 static int
2365 smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key)
2366 {
2367         struct cifs_ses *ses;
2368         u8 *ses_enc_key;
2369
2370         spin_lock(&cifs_tcp_ses_lock);
2371         list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
2372                 if (ses->Suid != ses_id)
2373                         continue;
2374                 ses_enc_key = enc ? ses->smb3encryptionkey :
2375                                                         ses->smb3decryptionkey;
2376                 memcpy(key, ses_enc_key, SMB3_SIGN_KEY_SIZE);
2377                 spin_unlock(&cifs_tcp_ses_lock);
2378                 return 0;
2379         }
2380         spin_unlock(&cifs_tcp_ses_lock);
2381
2382         return 1;
2383 }
2384 /*
2385  * Encrypt or decrypt @rqst message. @rqst[0] has the following format:
2386  * iov[0]   - transform header (associate data),
2387  * iov[1-N] - SMB2 header and pages - data to encrypt.
2388  * On success return encrypted data in iov[1-N] and pages, leave iov[0]
2389  * untouched.
2390  */
2391 static int
2392 crypt_message(struct TCP_Server_Info *server, struct smb_rqst *rqst, int enc)
2393 {
2394         struct smb2_transform_hdr *tr_hdr =
2395                         (struct smb2_transform_hdr *)rqst->rq_iov[0].iov_base;
2396         unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20;
2397         int rc = 0;
2398         struct scatterlist *sg;
2399         u8 sign[SMB2_SIGNATURE_SIZE] = {};
2400         u8 key[SMB3_SIGN_KEY_SIZE];
2401         struct aead_request *req;
2402         char *iv;
2403         unsigned int iv_len;
2404         DECLARE_CRYPTO_WAIT(wait);
2405         struct crypto_aead *tfm;
2406         unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
2407
2408         rc = smb2_get_enc_key(server, tr_hdr->SessionId, enc, key);
2409         if (rc) {
2410                 cifs_dbg(VFS, "%s: Could not get %scryption key\n", __func__,
2411                          enc ? "en" : "de");
2412                 return 0;
2413         }
2414
2415         rc = smb3_crypto_aead_allocate(server);
2416         if (rc) {
2417                 cifs_dbg(VFS, "%s: crypto alloc failed\n", __func__);
2418                 return rc;
2419         }
2420
2421         tfm = enc ? server->secmech.ccmaesencrypt :
2422                                                 server->secmech.ccmaesdecrypt;
2423         rc = crypto_aead_setkey(tfm, key, SMB3_SIGN_KEY_SIZE);
2424         if (rc) {
2425                 cifs_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc);
2426                 return rc;
2427         }
2428
2429         rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE);
2430         if (rc) {
2431                 cifs_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc);
2432                 return rc;
2433         }
2434
2435         req = aead_request_alloc(tfm, GFP_KERNEL);
2436         if (!req) {
2437                 cifs_dbg(VFS, "%s: Failed to alloc aead request", __func__);
2438                 return -ENOMEM;
2439         }
2440
2441         if (!enc) {
2442                 memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE);
2443                 crypt_len += SMB2_SIGNATURE_SIZE;
2444         }
2445
2446         sg = init_sg(rqst, sign);
2447         if (!sg) {
2448                 cifs_dbg(VFS, "%s: Failed to init sg", __func__);
2449                 rc = -ENOMEM;
2450                 goto free_req;
2451         }
2452
2453         iv_len = crypto_aead_ivsize(tfm);
2454         iv = kzalloc(iv_len, GFP_KERNEL);
2455         if (!iv) {
2456                 cifs_dbg(VFS, "%s: Failed to alloc IV", __func__);
2457                 rc = -ENOMEM;
2458                 goto free_sg;
2459         }
2460         iv[0] = 3;
2461         memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES128CMM_NONCE);
2462
2463         aead_request_set_crypt(req, sg, sg, crypt_len, iv);
2464         aead_request_set_ad(req, assoc_data_len);
2465
2466         aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
2467                                   crypto_req_done, &wait);
2468
2469         rc = crypto_wait_req(enc ? crypto_aead_encrypt(req)
2470                                 : crypto_aead_decrypt(req), &wait);
2471
2472         if (!rc && enc)
2473                 memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE);
2474
2475         kfree(iv);
2476 free_sg:
2477         kfree(sg);
2478 free_req:
2479         kfree(req);
2480         return rc;
2481 }
2482
2483 static int
2484 smb3_init_transform_rq(struct TCP_Server_Info *server, struct smb_rqst *new_rq,
2485                        struct smb_rqst *old_rq)
2486 {
2487         struct kvec *iov;
2488         struct page **pages;
2489         struct smb2_transform_hdr *tr_hdr;
2490         unsigned int npages = old_rq->rq_npages;
2491         unsigned int orig_len;
2492         int i;
2493         int rc = -ENOMEM;
2494
2495         pages = kmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
2496         if (!pages)
2497                 return rc;
2498
2499         new_rq->rq_pages = pages;
2500         new_rq->rq_offset = old_rq->rq_offset;
2501         new_rq->rq_npages = old_rq->rq_npages;
2502         new_rq->rq_pagesz = old_rq->rq_pagesz;
2503         new_rq->rq_tailsz = old_rq->rq_tailsz;
2504
2505         for (i = 0; i < npages; i++) {
2506                 pages[i] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
2507                 if (!pages[i])
2508                         goto err_free_pages;
2509         }
2510
2511         iov = kmalloc_array(old_rq->rq_nvec + 1, sizeof(struct kvec),
2512                             GFP_KERNEL);
2513         if (!iov)
2514                 goto err_free_pages;
2515
2516         /* copy all iovs from the old */
2517         memcpy(&iov[1], &old_rq->rq_iov[0],
2518                                 sizeof(struct kvec) * old_rq->rq_nvec);
2519
2520         new_rq->rq_iov = iov;
2521         new_rq->rq_nvec = old_rq->rq_nvec + 1;
2522
2523         tr_hdr = kmalloc(sizeof(struct smb2_transform_hdr), GFP_KERNEL);
2524         if (!tr_hdr)
2525                 goto err_free_iov;
2526
2527         orig_len = smb_rqst_len(server, old_rq);
2528
2529         /* fill the 2nd iov with a transform header */
2530         fill_transform_hdr(tr_hdr, orig_len, old_rq);
2531         new_rq->rq_iov[0].iov_base = tr_hdr;
2532         new_rq->rq_iov[0].iov_len = sizeof(struct smb2_transform_hdr);
2533
2534         /* copy pages form the old */
2535         for (i = 0; i < npages; i++) {
2536                 char *dst, *src;
2537                 unsigned int offset, len;
2538
2539                 rqst_page_get_length(new_rq, i, &len, &offset);
2540
2541                 dst = (char *) kmap(new_rq->rq_pages[i]) + offset;
2542                 src = (char *) kmap(old_rq->rq_pages[i]) + offset;
2543
2544                 memcpy(dst, src, len);
2545                 kunmap(new_rq->rq_pages[i]);
2546                 kunmap(old_rq->rq_pages[i]);
2547         }
2548
2549         rc = crypt_message(server, new_rq, 1);
2550         cifs_dbg(FYI, "encrypt message returned %d", rc);
2551         if (rc)
2552                 goto err_free_tr_hdr;
2553
2554         return rc;
2555
2556 err_free_tr_hdr:
2557         kfree(tr_hdr);
2558 err_free_iov:
2559         kfree(iov);
2560 err_free_pages:
2561         for (i = i - 1; i >= 0; i--)
2562                 put_page(pages[i]);
2563         kfree(pages);
2564         return rc;
2565 }
2566
2567 static void
2568 smb3_free_transform_rq(struct smb_rqst *rqst)
2569 {
2570         int i = rqst->rq_npages - 1;
2571
2572         for (; i >= 0; i--)
2573                 put_page(rqst->rq_pages[i]);
2574         kfree(rqst->rq_pages);
2575         /* free transform header */
2576         kfree(rqst->rq_iov[0].iov_base);
2577         kfree(rqst->rq_iov);
2578 }
2579
2580 static int
2581 smb3_is_transform_hdr(void *buf)
2582 {
2583         struct smb2_transform_hdr *trhdr = buf;
2584
2585         return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
2586 }
2587
2588 static int
2589 decrypt_raw_data(struct TCP_Server_Info *server, char *buf,
2590                  unsigned int buf_data_size, struct page **pages,
2591                  unsigned int npages, unsigned int page_data_size)
2592 {
2593         struct kvec iov[2];
2594         struct smb_rqst rqst = {NULL};
2595         int rc;
2596
2597         iov[0].iov_base = buf;
2598         iov[0].iov_len = sizeof(struct smb2_transform_hdr);
2599         iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr);
2600         iov[1].iov_len = buf_data_size;
2601
2602         rqst.rq_iov = iov;
2603         rqst.rq_nvec = 2;
2604         rqst.rq_pages = pages;
2605         rqst.rq_npages = npages;
2606         rqst.rq_pagesz = PAGE_SIZE;
2607         rqst.rq_tailsz = (page_data_size % PAGE_SIZE) ? : PAGE_SIZE;
2608
2609         rc = crypt_message(server, &rqst, 0);
2610         cifs_dbg(FYI, "decrypt message returned %d\n", rc);
2611
2612         if (rc)
2613                 return rc;
2614
2615         memmove(buf, iov[1].iov_base, buf_data_size);
2616
2617         server->total_read = buf_data_size + page_data_size;
2618
2619         return rc;
2620 }
2621
2622 static int
2623 read_data_into_pages(struct TCP_Server_Info *server, struct page **pages,
2624                      unsigned int npages, unsigned int len)
2625 {
2626         int i;
2627         int length;
2628
2629         for (i = 0; i < npages; i++) {
2630                 struct page *page = pages[i];
2631                 size_t n;
2632
2633                 n = len;
2634                 if (len >= PAGE_SIZE) {
2635                         /* enough data to fill the page */
2636                         n = PAGE_SIZE;
2637                         len -= n;
2638                 } else {
2639                         zero_user(page, len, PAGE_SIZE - len);
2640                         len = 0;
2641                 }
2642                 length = cifs_read_page_from_socket(server, page, 0, n);
2643                 if (length < 0)
2644                         return length;
2645                 server->total_read += length;
2646         }
2647
2648         return 0;
2649 }
2650
2651 static int
2652 init_read_bvec(struct page **pages, unsigned int npages, unsigned int data_size,
2653                unsigned int cur_off, struct bio_vec **page_vec)
2654 {
2655         struct bio_vec *bvec;
2656         int i;
2657
2658         bvec = kcalloc(npages, sizeof(struct bio_vec), GFP_KERNEL);
2659         if (!bvec)
2660                 return -ENOMEM;
2661
2662         for (i = 0; i < npages; i++) {
2663                 bvec[i].bv_page = pages[i];
2664                 bvec[i].bv_offset = (i == 0) ? cur_off : 0;
2665                 bvec[i].bv_len = min_t(unsigned int, PAGE_SIZE, data_size);
2666                 data_size -= bvec[i].bv_len;
2667         }
2668
2669         if (data_size != 0) {
2670                 cifs_dbg(VFS, "%s: something went wrong\n", __func__);
2671                 kfree(bvec);
2672                 return -EIO;
2673         }
2674
2675         *page_vec = bvec;
2676         return 0;
2677 }
2678
2679 static int
2680 handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid,
2681                  char *buf, unsigned int buf_len, struct page **pages,
2682                  unsigned int npages, unsigned int page_data_size)
2683 {
2684         unsigned int data_offset;
2685         unsigned int data_len;
2686         unsigned int cur_off;
2687         unsigned int cur_page_idx;
2688         unsigned int pad_len;
2689         struct cifs_readdata *rdata = mid->callback_data;
2690         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
2691         struct bio_vec *bvec = NULL;
2692         struct iov_iter iter;
2693         struct kvec iov;
2694         int length;
2695         bool use_rdma_mr = false;
2696
2697         if (shdr->Command != SMB2_READ) {
2698                 cifs_dbg(VFS, "only big read responses are supported\n");
2699                 return -ENOTSUPP;
2700         }
2701
2702         if (server->ops->is_session_expired &&
2703             server->ops->is_session_expired(buf)) {
2704                 cifs_reconnect(server);
2705                 wake_up(&server->response_q);
2706                 return -1;
2707         }
2708
2709         if (server->ops->is_status_pending &&
2710                         server->ops->is_status_pending(buf, server, 0))
2711                 return -1;
2712
2713         rdata->result = server->ops->map_error(buf, false);
2714         if (rdata->result != 0) {
2715                 cifs_dbg(FYI, "%s: server returned error %d\n",
2716                          __func__, rdata->result);
2717                 dequeue_mid(mid, rdata->result);
2718                 return 0;
2719         }
2720
2721         data_offset = server->ops->read_data_offset(buf);
2722 #ifdef CONFIG_CIFS_SMB_DIRECT
2723         use_rdma_mr = rdata->mr;
2724 #endif
2725         data_len = server->ops->read_data_length(buf, use_rdma_mr);
2726
2727         if (data_offset < server->vals->read_rsp_size) {
2728                 /*
2729                  * win2k8 sometimes sends an offset of 0 when the read
2730                  * is beyond the EOF. Treat it as if the data starts just after
2731                  * the header.
2732                  */
2733                 cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n",
2734                          __func__, data_offset);
2735                 data_offset = server->vals->read_rsp_size;
2736         } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) {
2737                 /* data_offset is beyond the end of smallbuf */
2738                 cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n",
2739                          __func__, data_offset);
2740                 rdata->result = -EIO;
2741                 dequeue_mid(mid, rdata->result);
2742                 return 0;
2743         }
2744
2745         pad_len = data_offset - server->vals->read_rsp_size;
2746
2747         if (buf_len <= data_offset) {
2748                 /* read response payload is in pages */
2749                 cur_page_idx = pad_len / PAGE_SIZE;
2750                 cur_off = pad_len % PAGE_SIZE;
2751
2752                 if (cur_page_idx != 0) {
2753                         /* data offset is beyond the 1st page of response */
2754                         cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n",
2755                                  __func__, data_offset);
2756                         rdata->result = -EIO;
2757                         dequeue_mid(mid, rdata->result);
2758                         return 0;
2759                 }
2760
2761                 if (data_len > page_data_size - pad_len) {
2762                         /* data_len is corrupt -- discard frame */
2763                         rdata->result = -EIO;
2764                         dequeue_mid(mid, rdata->result);
2765                         return 0;
2766                 }
2767
2768                 rdata->result = init_read_bvec(pages, npages, page_data_size,
2769                                                cur_off, &bvec);
2770                 if (rdata->result != 0) {
2771                         dequeue_mid(mid, rdata->result);
2772                         return 0;
2773                 }
2774
2775                 iov_iter_bvec(&iter, WRITE | ITER_BVEC, bvec, npages, data_len);
2776         } else if (buf_len >= data_offset + data_len) {
2777                 /* read response payload is in buf */
2778                 WARN_ONCE(npages > 0, "read data can be either in buf or in pages");
2779                 iov.iov_base = buf + data_offset;
2780                 iov.iov_len = data_len;
2781                 iov_iter_kvec(&iter, WRITE | ITER_KVEC, &iov, 1, data_len);
2782         } else {
2783                 /* read response payload cannot be in both buf and pages */
2784                 WARN_ONCE(1, "buf can not contain only a part of read data");
2785                 rdata->result = -EIO;
2786                 dequeue_mid(mid, rdata->result);
2787                 return 0;
2788         }
2789
2790         /* set up first iov for signature check */
2791         rdata->iov[0].iov_base = buf;
2792         rdata->iov[0].iov_len = 4;
2793         rdata->iov[1].iov_base = buf + 4;
2794         rdata->iov[1].iov_len = server->vals->read_rsp_size - 4;
2795         cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n",
2796                  rdata->iov[0].iov_base, server->vals->read_rsp_size);
2797
2798         length = rdata->copy_into_pages(server, rdata, &iter);
2799
2800         kfree(bvec);
2801
2802         if (length < 0)
2803                 return length;
2804
2805         dequeue_mid(mid, false);
2806         return length;
2807 }
2808
2809 static int
2810 receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid)
2811 {
2812         char *buf = server->smallbuf;
2813         struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
2814         unsigned int npages;
2815         struct page **pages;
2816         unsigned int len;
2817         unsigned int buflen = server->pdu_size;
2818         int rc;
2819         int i = 0;
2820
2821         len = min_t(unsigned int, buflen, server->vals->read_rsp_size +
2822                 sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1;
2823
2824         rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len);
2825         if (rc < 0)
2826                 return rc;
2827         server->total_read += rc;
2828
2829         len = le32_to_cpu(tr_hdr->OriginalMessageSize) -
2830                 server->vals->read_rsp_size;
2831         npages = DIV_ROUND_UP(len, PAGE_SIZE);
2832
2833         pages = kmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
2834         if (!pages) {
2835                 rc = -ENOMEM;
2836                 goto discard_data;
2837         }
2838
2839         for (; i < npages; i++) {
2840                 pages[i] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
2841                 if (!pages[i]) {
2842                         rc = -ENOMEM;
2843                         goto discard_data;
2844                 }
2845         }
2846
2847         /* read read data into pages */
2848         rc = read_data_into_pages(server, pages, npages, len);
2849         if (rc)
2850                 goto free_pages;
2851
2852         rc = cifs_discard_remaining_data(server);
2853         if (rc)
2854                 goto free_pages;
2855
2856         rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size,
2857                               pages, npages, len);
2858         if (rc)
2859                 goto free_pages;
2860
2861         *mid = smb2_find_mid(server, buf);
2862         if (*mid == NULL)
2863                 cifs_dbg(FYI, "mid not found\n");
2864         else {
2865                 cifs_dbg(FYI, "mid found\n");
2866                 (*mid)->decrypted = true;
2867                 rc = handle_read_data(server, *mid, buf,
2868                                       server->vals->read_rsp_size,
2869                                       pages, npages, len);
2870         }
2871
2872 free_pages:
2873         for (i = i - 1; i >= 0; i--)
2874                 put_page(pages[i]);
2875         kfree(pages);
2876         return rc;
2877 discard_data:
2878         cifs_discard_remaining_data(server);
2879         goto free_pages;
2880 }
2881
2882 static int
2883 receive_encrypted_standard(struct TCP_Server_Info *server,
2884                            struct mid_q_entry **mid)
2885 {
2886         int length;
2887         char *buf = server->smallbuf;
2888         unsigned int pdu_length = server->pdu_size;
2889         unsigned int buf_size;
2890         struct mid_q_entry *mid_entry;
2891
2892         /* switch to large buffer if too big for a small one */
2893         if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE) {
2894                 server->large_buf = true;
2895                 memcpy(server->bigbuf, buf, server->total_read);
2896                 buf = server->bigbuf;
2897         }
2898
2899         /* now read the rest */
2900         length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
2901                                 pdu_length - HEADER_SIZE(server) + 1);
2902         if (length < 0)
2903                 return length;
2904         server->total_read += length;
2905
2906         buf_size = pdu_length - sizeof(struct smb2_transform_hdr);
2907         length = decrypt_raw_data(server, buf, buf_size, NULL, 0, 0);
2908         if (length)
2909                 return length;
2910
2911         mid_entry = smb2_find_mid(server, buf);
2912         if (mid_entry == NULL)
2913                 cifs_dbg(FYI, "mid not found\n");
2914         else {
2915                 cifs_dbg(FYI, "mid found\n");
2916                 mid_entry->decrypted = true;
2917         }
2918
2919         *mid = mid_entry;
2920
2921         if (mid_entry && mid_entry->handle)
2922                 return mid_entry->handle(server, mid_entry);
2923
2924         return cifs_handle_standard(server, mid_entry);
2925 }
2926
2927 static int
2928 smb3_receive_transform(struct TCP_Server_Info *server, struct mid_q_entry **mid)
2929 {
2930         char *buf = server->smallbuf;
2931         unsigned int pdu_length = server->pdu_size;
2932         struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
2933         unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
2934
2935         if (pdu_length < sizeof(struct smb2_transform_hdr) +
2936                                                 sizeof(struct smb2_sync_hdr)) {
2937                 cifs_dbg(VFS, "Transform message is too small (%u)\n",
2938                          pdu_length);
2939                 cifs_reconnect(server);
2940                 wake_up(&server->response_q);
2941                 return -ECONNABORTED;
2942         }
2943
2944         if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) {
2945                 cifs_dbg(VFS, "Transform message is broken\n");
2946                 cifs_reconnect(server);
2947                 wake_up(&server->response_q);
2948                 return -ECONNABORTED;
2949         }
2950
2951         if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server))
2952                 return receive_encrypted_read(server, mid);
2953
2954         return receive_encrypted_standard(server, mid);
2955 }
2956
2957 int
2958 smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid)
2959 {
2960         char *buf = server->large_buf ? server->bigbuf : server->smallbuf;
2961
2962         return handle_read_data(server, mid, buf, server->pdu_size,
2963                                 NULL, 0, 0);
2964 }
2965
2966 static int
2967 smb2_next_header(char *buf)
2968 {
2969         struct smb2_sync_hdr *hdr = (struct smb2_sync_hdr *)buf;
2970         struct smb2_transform_hdr *t_hdr = (struct smb2_transform_hdr *)buf;
2971
2972         if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM)
2973                 return sizeof(struct smb2_transform_hdr) +
2974                   le32_to_cpu(t_hdr->OriginalMessageSize);
2975
2976         return le32_to_cpu(hdr->NextCommand);
2977 }
2978
2979 struct smb_version_operations smb20_operations = {
2980         .compare_fids = smb2_compare_fids,
2981         .setup_request = smb2_setup_request,
2982         .setup_async_request = smb2_setup_async_request,
2983         .check_receive = smb2_check_receive,
2984         .add_credits = smb2_add_credits,
2985         .set_credits = smb2_set_credits,
2986         .get_credits_field = smb2_get_credits_field,
2987         .get_credits = smb2_get_credits,
2988         .wait_mtu_credits = cifs_wait_mtu_credits,
2989         .get_next_mid = smb2_get_next_mid,
2990         .read_data_offset = smb2_read_data_offset,
2991         .read_data_length = smb2_read_data_length,
2992         .map_error = map_smb2_to_linux_error,
2993         .find_mid = smb2_find_mid,
2994         .check_message = smb2_check_message,
2995         .dump_detail = smb2_dump_detail,
2996         .clear_stats = smb2_clear_stats,
2997         .print_stats = smb2_print_stats,
2998         .is_oplock_break = smb2_is_valid_oplock_break,
2999         .handle_cancelled_mid = smb2_handle_cancelled_mid,
3000         .downgrade_oplock = smb2_downgrade_oplock,
3001         .need_neg = smb2_need_neg,
3002         .negotiate = smb2_negotiate,
3003         .negotiate_wsize = smb2_negotiate_wsize,
3004         .negotiate_rsize = smb2_negotiate_rsize,
3005         .sess_setup = SMB2_sess_setup,
3006         .logoff = SMB2_logoff,
3007         .tree_connect = SMB2_tcon,
3008         .tree_disconnect = SMB2_tdis,
3009         .qfs_tcon = smb2_qfs_tcon,
3010         .is_path_accessible = smb2_is_path_accessible,
3011         .can_echo = smb2_can_echo,
3012         .echo = SMB2_echo,
3013         .query_path_info = smb2_query_path_info,
3014         .get_srv_inum = smb2_get_srv_inum,
3015         .query_file_info = smb2_query_file_info,
3016         .set_path_size = smb2_set_path_size,
3017         .set_file_size = smb2_set_file_size,
3018         .set_file_info = smb2_set_file_info,
3019         .set_compression = smb2_set_compression,
3020         .mkdir = smb2_mkdir,
3021         .mkdir_setinfo = smb2_mkdir_setinfo,
3022         .rmdir = smb2_rmdir,
3023         .unlink = smb2_unlink,
3024         .rename = smb2_rename_path,
3025         .create_hardlink = smb2_create_hardlink,
3026         .query_symlink = smb2_query_symlink,
3027         .query_mf_symlink = smb3_query_mf_symlink,
3028         .create_mf_symlink = smb3_create_mf_symlink,
3029         .open = smb2_open_file,
3030         .set_fid = smb2_set_fid,
3031         .close = smb2_close_file,
3032         .flush = smb2_flush_file,
3033         .async_readv = smb2_async_readv,
3034         .async_writev = smb2_async_writev,
3035         .sync_read = smb2_sync_read,
3036         .sync_write = smb2_sync_write,
3037         .query_dir_first = smb2_query_dir_first,
3038         .query_dir_next = smb2_query_dir_next,
3039         .close_dir = smb2_close_dir,
3040         .calc_smb_size = smb2_calc_size,
3041         .is_status_pending = smb2_is_status_pending,
3042         .is_session_expired = smb2_is_session_expired,
3043         .oplock_response = smb2_oplock_response,
3044         .queryfs = smb2_queryfs,
3045         .mand_lock = smb2_mand_lock,
3046         .mand_unlock_range = smb2_unlock_range,
3047         .push_mand_locks = smb2_push_mandatory_locks,
3048         .get_lease_key = smb2_get_lease_key,
3049         .set_lease_key = smb2_set_lease_key,
3050         .new_lease_key = smb2_new_lease_key,
3051         .calc_signature = smb2_calc_signature,
3052         .is_read_op = smb2_is_read_op,
3053         .set_oplock_level = smb2_set_oplock_level,
3054         .create_lease_buf = smb2_create_lease_buf,
3055         .parse_lease_buf = smb2_parse_lease_buf,
3056         .copychunk_range = smb2_copychunk_range,
3057         .wp_retry_size = smb2_wp_retry_size,
3058         .dir_needs_close = smb2_dir_needs_close,
3059         .get_dfs_refer = smb2_get_dfs_refer,
3060         .select_sectype = smb2_select_sectype,
3061 #ifdef CONFIG_CIFS_XATTR
3062         .query_all_EAs = smb2_query_eas,
3063         .set_EA = smb2_set_ea,
3064 #endif /* CIFS_XATTR */
3065 #ifdef CONFIG_CIFS_ACL
3066         .get_acl = get_smb2_acl,
3067         .get_acl_by_fid = get_smb2_acl_by_fid,
3068         .set_acl = set_smb2_acl,
3069 #endif /* CIFS_ACL */
3070         .next_header = smb2_next_header,
3071 };
3072
3073 struct smb_version_operations smb21_operations = {
3074         .compare_fids = smb2_compare_fids,
3075         .setup_request = smb2_setup_request,
3076         .setup_async_request = smb2_setup_async_request,
3077         .check_receive = smb2_check_receive,
3078         .add_credits = smb2_add_credits,
3079         .set_credits = smb2_set_credits,
3080         .get_credits_field = smb2_get_credits_field,
3081         .get_credits = smb2_get_credits,
3082         .wait_mtu_credits = smb2_wait_mtu_credits,
3083         .get_next_mid = smb2_get_next_mid,
3084         .read_data_offset = smb2_read_data_offset,
3085         .read_data_length = smb2_read_data_length,
3086         .map_error = map_smb2_to_linux_error,
3087         .find_mid = smb2_find_mid,
3088         .check_message = smb2_check_message,
3089         .dump_detail = smb2_dump_detail,
3090         .clear_stats = smb2_clear_stats,
3091         .print_stats = smb2_print_stats,
3092         .is_oplock_break = smb2_is_valid_oplock_break,
3093         .handle_cancelled_mid = smb2_handle_cancelled_mid,
3094         .downgrade_oplock = smb2_downgrade_oplock,
3095         .need_neg = smb2_need_neg,
3096         .negotiate = smb2_negotiate,
3097         .negotiate_wsize = smb2_negotiate_wsize,
3098         .negotiate_rsize = smb2_negotiate_rsize,
3099         .sess_setup = SMB2_sess_setup,
3100         .logoff = SMB2_logoff,
3101         .tree_connect = SMB2_tcon,
3102         .tree_disconnect = SMB2_tdis,
3103         .qfs_tcon = smb2_qfs_tcon,
3104         .is_path_accessible = smb2_is_path_accessible,
3105         .can_echo = smb2_can_echo,
3106         .echo = SMB2_echo,
3107         .query_path_info = smb2_query_path_info,
3108         .get_srv_inum = smb2_get_srv_inum,
3109         .query_file_info = smb2_query_file_info,
3110         .set_path_size = smb2_set_path_size,
3111         .set_file_size = smb2_set_file_size,
3112         .set_file_info = smb2_set_file_info,
3113         .set_compression = smb2_set_compression,
3114         .mkdir = smb2_mkdir,
3115         .mkdir_setinfo = smb2_mkdir_setinfo,
3116         .rmdir = smb2_rmdir,
3117         .unlink = smb2_unlink,
3118         .rename = smb2_rename_path,
3119         .create_hardlink = smb2_create_hardlink,
3120         .query_symlink = smb2_query_symlink,
3121         .query_mf_symlink = smb3_query_mf_symlink,
3122         .create_mf_symlink = smb3_create_mf_symlink,
3123         .open = smb2_open_file,
3124         .set_fid = smb2_set_fid,
3125         .close = smb2_close_file,
3126         .flush = smb2_flush_file,
3127         .async_readv = smb2_async_readv,
3128         .async_writev = smb2_async_writev,
3129         .sync_read = smb2_sync_read,
3130         .sync_write = smb2_sync_write,
3131         .query_dir_first = smb2_query_dir_first,
3132         .query_dir_next = smb2_query_dir_next,
3133         .close_dir = smb2_close_dir,
3134         .calc_smb_size = smb2_calc_size,
3135         .is_status_pending = smb2_is_status_pending,
3136         .is_session_expired = smb2_is_session_expired,
3137         .oplock_response = smb2_oplock_response,
3138         .queryfs = smb2_queryfs,
3139         .mand_lock = smb2_mand_lock,
3140         .mand_unlock_range = smb2_unlock_range,
3141         .push_mand_locks = smb2_push_mandatory_locks,
3142         .get_lease_key = smb2_get_lease_key,
3143         .set_lease_key = smb2_set_lease_key,
3144         .new_lease_key = smb2_new_lease_key,
3145         .calc_signature = smb2_calc_signature,
3146         .is_read_op = smb21_is_read_op,
3147         .set_oplock_level = smb21_set_oplock_level,
3148         .create_lease_buf = smb2_create_lease_buf,
3149         .parse_lease_buf = smb2_parse_lease_buf,
3150         .copychunk_range = smb2_copychunk_range,
3151         .wp_retry_size = smb2_wp_retry_size,
3152         .dir_needs_close = smb2_dir_needs_close,
3153         .enum_snapshots = smb3_enum_snapshots,
3154         .get_dfs_refer = smb2_get_dfs_refer,
3155         .select_sectype = smb2_select_sectype,
3156 #ifdef CONFIG_CIFS_XATTR
3157         .query_all_EAs = smb2_query_eas,
3158         .set_EA = smb2_set_ea,
3159 #endif /* CIFS_XATTR */
3160 #ifdef CONFIG_CIFS_ACL
3161         .get_acl = get_smb2_acl,
3162         .get_acl_by_fid = get_smb2_acl_by_fid,
3163         .set_acl = set_smb2_acl,
3164 #endif /* CIFS_ACL */
3165         .next_header = smb2_next_header,
3166 };
3167
3168 struct smb_version_operations smb30_operations = {
3169         .compare_fids = smb2_compare_fids,
3170         .setup_request = smb2_setup_request,
3171         .setup_async_request = smb2_setup_async_request,
3172         .check_receive = smb2_check_receive,
3173         .add_credits = smb2_add_credits,
3174         .set_credits = smb2_set_credits,
3175         .get_credits_field = smb2_get_credits_field,
3176         .get_credits = smb2_get_credits,
3177         .wait_mtu_credits = smb2_wait_mtu_credits,
3178         .get_next_mid = smb2_get_next_mid,
3179         .read_data_offset = smb2_read_data_offset,
3180         .read_data_length = smb2_read_data_length,
3181         .map_error = map_smb2_to_linux_error,
3182         .find_mid = smb2_find_mid,
3183         .check_message = smb2_check_message,
3184         .dump_detail = smb2_dump_detail,
3185         .clear_stats = smb2_clear_stats,
3186         .print_stats = smb2_print_stats,
3187         .dump_share_caps = smb2_dump_share_caps,
3188         .is_oplock_break = smb2_is_valid_oplock_break,
3189         .handle_cancelled_mid = smb2_handle_cancelled_mid,
3190         .downgrade_oplock = smb2_downgrade_oplock,
3191         .need_neg = smb2_need_neg,
3192         .negotiate = smb2_negotiate,
3193         .negotiate_wsize = smb2_negotiate_wsize,
3194         .negotiate_rsize = smb2_negotiate_rsize,
3195         .sess_setup = SMB2_sess_setup,
3196         .logoff = SMB2_logoff,
3197         .tree_connect = SMB2_tcon,
3198         .tree_disconnect = SMB2_tdis,
3199         .qfs_tcon = smb3_qfs_tcon,
3200         .is_path_accessible = smb2_is_path_accessible,
3201         .can_echo = smb2_can_echo,
3202         .echo = SMB2_echo,
3203         .query_path_info = smb2_query_path_info,
3204         .get_srv_inum = smb2_get_srv_inum,
3205         .query_file_info = smb2_query_file_info,
3206         .set_path_size = smb2_set_path_size,
3207         .set_file_size = smb2_set_file_size,
3208         .set_file_info = smb2_set_file_info,
3209         .set_compression = smb2_set_compression,
3210         .mkdir = smb2_mkdir,
3211         .mkdir_setinfo = smb2_mkdir_setinfo,
3212         .rmdir = smb2_rmdir,
3213         .unlink = smb2_unlink,
3214         .rename = smb2_rename_path,
3215         .create_hardlink = smb2_create_hardlink,
3216         .query_symlink = smb2_query_symlink,
3217         .query_mf_symlink = smb3_query_mf_symlink,
3218         .create_mf_symlink = smb3_create_mf_symlink,
3219         .open = smb2_open_file,
3220         .set_fid = smb2_set_fid,
3221         .close = smb2_close_file,
3222         .flush = smb2_flush_file,
3223         .async_readv = smb2_async_readv,
3224         .async_writev = smb2_async_writev,
3225         .sync_read = smb2_sync_read,
3226         .sync_write = smb2_sync_write,
3227         .query_dir_first = smb2_query_dir_first,
3228         .query_dir_next = smb2_query_dir_next,
3229         .close_dir = smb2_close_dir,
3230         .calc_smb_size = smb2_calc_size,
3231         .is_status_pending = smb2_is_status_pending,
3232         .is_session_expired = smb2_is_session_expired,
3233         .oplock_response = smb2_oplock_response,
3234         .queryfs = smb2_queryfs,
3235         .mand_lock = smb2_mand_lock,
3236         .mand_unlock_range = smb2_unlock_range,
3237         .push_mand_locks = smb2_push_mandatory_locks,
3238         .get_lease_key = smb2_get_lease_key,
3239         .set_lease_key = smb2_set_lease_key,
3240         .new_lease_key = smb2_new_lease_key,
3241         .generate_signingkey = generate_smb30signingkey,
3242         .calc_signature = smb3_calc_signature,
3243         .set_integrity  = smb3_set_integrity,
3244         .is_read_op = smb21_is_read_op,
3245         .set_oplock_level = smb3_set_oplock_level,
3246         .create_lease_buf = smb3_create_lease_buf,
3247         .parse_lease_buf = smb3_parse_lease_buf,
3248         .copychunk_range = smb2_copychunk_range,
3249         .duplicate_extents = smb2_duplicate_extents,
3250         .validate_negotiate = smb3_validate_negotiate,
3251         .wp_retry_size = smb2_wp_retry_size,
3252         .dir_needs_close = smb2_dir_needs_close,
3253         .fallocate = smb3_fallocate,
3254         .enum_snapshots = smb3_enum_snapshots,
3255         .init_transform_rq = smb3_init_transform_rq,
3256         .free_transform_rq = smb3_free_transform_rq,
3257         .is_transform_hdr = smb3_is_transform_hdr,
3258         .receive_transform = smb3_receive_transform,
3259         .get_dfs_refer = smb2_get_dfs_refer,
3260         .select_sectype = smb2_select_sectype,
3261 #ifdef CONFIG_CIFS_XATTR
3262         .query_all_EAs = smb2_query_eas,
3263         .set_EA = smb2_set_ea,
3264 #endif /* CIFS_XATTR */
3265 #ifdef CONFIG_CIFS_ACL
3266         .get_acl = get_smb2_acl,
3267         .get_acl_by_fid = get_smb2_acl_by_fid,
3268         .set_acl = set_smb2_acl,
3269 #endif /* CIFS_ACL */
3270         .next_header = smb2_next_header,
3271 };
3272
3273 #ifdef CONFIG_CIFS_SMB311
3274 struct smb_version_operations smb311_operations = {
3275         .compare_fids = smb2_compare_fids,
3276         .setup_request = smb2_setup_request,
3277         .setup_async_request = smb2_setup_async_request,
3278         .check_receive = smb2_check_receive,
3279         .add_credits = smb2_add_credits,
3280         .set_credits = smb2_set_credits,
3281         .get_credits_field = smb2_get_credits_field,
3282         .get_credits = smb2_get_credits,
3283         .wait_mtu_credits = smb2_wait_mtu_credits,
3284         .get_next_mid = smb2_get_next_mid,
3285         .read_data_offset = smb2_read_data_offset,
3286         .read_data_length = smb2_read_data_length,
3287         .map_error = map_smb2_to_linux_error,
3288         .find_mid = smb2_find_mid,
3289         .check_message = smb2_check_message,
3290         .dump_detail = smb2_dump_detail,
3291         .clear_stats = smb2_clear_stats,
3292         .print_stats = smb2_print_stats,
3293         .dump_share_caps = smb2_dump_share_caps,
3294         .is_oplock_break = smb2_is_valid_oplock_break,
3295         .handle_cancelled_mid = smb2_handle_cancelled_mid,
3296         .downgrade_oplock = smb2_downgrade_oplock,
3297         .need_neg = smb2_need_neg,
3298         .negotiate = smb2_negotiate,
3299         .negotiate_wsize = smb2_negotiate_wsize,
3300         .negotiate_rsize = smb2_negotiate_rsize,
3301         .sess_setup = SMB2_sess_setup,
3302         .logoff = SMB2_logoff,
3303         .tree_connect = SMB2_tcon,
3304         .tree_disconnect = SMB2_tdis,
3305         .qfs_tcon = smb3_qfs_tcon,
3306         .is_path_accessible = smb2_is_path_accessible,
3307         .can_echo = smb2_can_echo,
3308         .echo = SMB2_echo,
3309         .query_path_info = smb2_query_path_info,
3310         .get_srv_inum = smb2_get_srv_inum,
3311         .query_file_info = smb2_query_file_info,
3312         .set_path_size = smb2_set_path_size,
3313         .set_file_size = smb2_set_file_size,
3314         .set_file_info = smb2_set_file_info,
3315         .set_compression = smb2_set_compression,
3316         .mkdir = smb2_mkdir,
3317         .mkdir_setinfo = smb2_mkdir_setinfo,
3318         .posix_mkdir = smb311_posix_mkdir,
3319         .rmdir = smb2_rmdir,
3320         .unlink = smb2_unlink,
3321         .rename = smb2_rename_path,
3322         .create_hardlink = smb2_create_hardlink,
3323         .query_symlink = smb2_query_symlink,
3324         .query_mf_symlink = smb3_query_mf_symlink,
3325         .create_mf_symlink = smb3_create_mf_symlink,
3326         .open = smb2_open_file,
3327         .set_fid = smb2_set_fid,
3328         .close = smb2_close_file,
3329         .flush = smb2_flush_file,
3330         .async_readv = smb2_async_readv,
3331         .async_writev = smb2_async_writev,
3332         .sync_read = smb2_sync_read,
3333         .sync_write = smb2_sync_write,
3334         .query_dir_first = smb2_query_dir_first,
3335         .query_dir_next = smb2_query_dir_next,
3336         .close_dir = smb2_close_dir,
3337         .calc_smb_size = smb2_calc_size,
3338         .is_status_pending = smb2_is_status_pending,
3339         .is_session_expired = smb2_is_session_expired,
3340         .oplock_response = smb2_oplock_response,
3341         .queryfs = smb2_queryfs,
3342         .mand_lock = smb2_mand_lock,
3343         .mand_unlock_range = smb2_unlock_range,
3344         .push_mand_locks = smb2_push_mandatory_locks,
3345         .get_lease_key = smb2_get_lease_key,
3346         .set_lease_key = smb2_set_lease_key,
3347         .new_lease_key = smb2_new_lease_key,
3348         .generate_signingkey = generate_smb311signingkey,
3349         .calc_signature = smb3_calc_signature,
3350         .set_integrity  = smb3_set_integrity,
3351         .is_read_op = smb21_is_read_op,
3352         .set_oplock_level = smb3_set_oplock_level,
3353         .create_lease_buf = smb3_create_lease_buf,
3354         .parse_lease_buf = smb3_parse_lease_buf,
3355         .copychunk_range = smb2_copychunk_range,
3356         .duplicate_extents = smb2_duplicate_extents,
3357 /*      .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
3358         .wp_retry_size = smb2_wp_retry_size,
3359         .dir_needs_close = smb2_dir_needs_close,
3360         .fallocate = smb3_fallocate,
3361         .enum_snapshots = smb3_enum_snapshots,
3362         .init_transform_rq = smb3_init_transform_rq,
3363         .free_transform_rq = smb3_free_transform_rq,
3364         .is_transform_hdr = smb3_is_transform_hdr,
3365         .receive_transform = smb3_receive_transform,
3366         .get_dfs_refer = smb2_get_dfs_refer,
3367         .select_sectype = smb2_select_sectype,
3368 #ifdef CONFIG_CIFS_XATTR
3369         .query_all_EAs = smb2_query_eas,
3370         .set_EA = smb2_set_ea,
3371 #endif /* CIFS_XATTR */
3372         .next_header = smb2_next_header,
3373 };
3374 #endif /* CIFS_SMB311 */
3375
3376 struct smb_version_values smb20_values = {
3377         .version_string = SMB20_VERSION_STRING,
3378         .protocol_id = SMB20_PROT_ID,
3379         .req_capabilities = 0, /* MBZ */
3380         .large_lock_type = 0,
3381         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3382         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3383         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3384         .header_size = sizeof(struct smb2_sync_hdr),
3385         .header_preamble_size = 0,
3386         .max_header_size = MAX_SMB2_HDR_SIZE,
3387         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3388         .lock_cmd = SMB2_LOCK,
3389         .cap_unix = 0,
3390         .cap_nt_find = SMB2_NT_FIND,
3391         .cap_large_files = SMB2_LARGE_FILES,
3392         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3393         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3394         .create_lease_size = sizeof(struct create_lease),
3395 };
3396
3397 struct smb_version_values smb21_values = {
3398         .version_string = SMB21_VERSION_STRING,
3399         .protocol_id = SMB21_PROT_ID,
3400         .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
3401         .large_lock_type = 0,
3402         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3403         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3404         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3405         .header_size = sizeof(struct smb2_sync_hdr),
3406         .header_preamble_size = 0,
3407         .max_header_size = MAX_SMB2_HDR_SIZE,
3408         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3409         .lock_cmd = SMB2_LOCK,
3410         .cap_unix = 0,
3411         .cap_nt_find = SMB2_NT_FIND,
3412         .cap_large_files = SMB2_LARGE_FILES,
3413         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3414         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3415         .create_lease_size = sizeof(struct create_lease),
3416 };
3417
3418 struct smb_version_values smb3any_values = {
3419         .version_string = SMB3ANY_VERSION_STRING,
3420         .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
3421         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
3422         .large_lock_type = 0,
3423         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3424         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3425         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3426         .header_size = sizeof(struct smb2_sync_hdr),
3427         .header_preamble_size = 0,
3428         .max_header_size = MAX_SMB2_HDR_SIZE,
3429         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3430         .lock_cmd = SMB2_LOCK,
3431         .cap_unix = 0,
3432         .cap_nt_find = SMB2_NT_FIND,
3433         .cap_large_files = SMB2_LARGE_FILES,
3434         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3435         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3436         .create_lease_size = sizeof(struct create_lease_v2),
3437 };
3438
3439 struct smb_version_values smbdefault_values = {
3440         .version_string = SMBDEFAULT_VERSION_STRING,
3441         .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
3442         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
3443         .large_lock_type = 0,
3444         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3445         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3446         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3447         .header_size = sizeof(struct smb2_sync_hdr),
3448         .header_preamble_size = 0,
3449         .max_header_size = MAX_SMB2_HDR_SIZE,
3450         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3451         .lock_cmd = SMB2_LOCK,
3452         .cap_unix = 0,
3453         .cap_nt_find = SMB2_NT_FIND,
3454         .cap_large_files = SMB2_LARGE_FILES,
3455         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3456         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3457         .create_lease_size = sizeof(struct create_lease_v2),
3458 };
3459
3460 struct smb_version_values smb30_values = {
3461         .version_string = SMB30_VERSION_STRING,
3462         .protocol_id = SMB30_PROT_ID,
3463         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
3464         .large_lock_type = 0,
3465         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3466         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3467         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3468         .header_size = sizeof(struct smb2_sync_hdr),
3469         .header_preamble_size = 0,
3470         .max_header_size = MAX_SMB2_HDR_SIZE,
3471         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3472         .lock_cmd = SMB2_LOCK,
3473         .cap_unix = 0,
3474         .cap_nt_find = SMB2_NT_FIND,
3475         .cap_large_files = SMB2_LARGE_FILES,
3476         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3477         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3478         .create_lease_size = sizeof(struct create_lease_v2),
3479 };
3480
3481 struct smb_version_values smb302_values = {
3482         .version_string = SMB302_VERSION_STRING,
3483         .protocol_id = SMB302_PROT_ID,
3484         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
3485         .large_lock_type = 0,
3486         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3487         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3488         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3489         .header_size = sizeof(struct smb2_sync_hdr),
3490         .header_preamble_size = 0,
3491         .max_header_size = MAX_SMB2_HDR_SIZE,
3492         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3493         .lock_cmd = SMB2_LOCK,
3494         .cap_unix = 0,
3495         .cap_nt_find = SMB2_NT_FIND,
3496         .cap_large_files = SMB2_LARGE_FILES,
3497         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3498         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3499         .create_lease_size = sizeof(struct create_lease_v2),
3500 };
3501
3502 #ifdef CONFIG_CIFS_SMB311
3503 struct smb_version_values smb311_values = {
3504         .version_string = SMB311_VERSION_STRING,
3505         .protocol_id = SMB311_PROT_ID,
3506         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
3507         .large_lock_type = 0,
3508         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3509         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3510         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3511         .header_size = sizeof(struct smb2_sync_hdr),
3512         .header_preamble_size = 0,
3513         .max_header_size = MAX_SMB2_HDR_SIZE,
3514         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3515         .lock_cmd = SMB2_LOCK,
3516         .cap_unix = 0,
3517         .cap_nt_find = SMB2_NT_FIND,
3518         .cap_large_files = SMB2_LARGE_FILES,
3519         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3520         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3521         .create_lease_size = sizeof(struct create_lease_v2),
3522 };
3523 #endif /* SMB311 */