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