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 = get_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 = get_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                         spin_unlock(&GlobalMid_Lock);
 207                         return mid;
 208                 }
 209         }
 210         spin_unlock(&GlobalMid_Lock);
 211         return NULL;
 212 }
 213
 214 static void
 215 smb2_dump_detail(void *buf, struct TCP_Server_Info *server)
 216 {
 217 #ifdef CONFIG_CIFS_DEBUG2
 218         struct smb2_sync_hdr *shdr = get_sync_hdr(buf);
 219
 220         cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
 221                  shdr->Command, shdr->Status, shdr->Flags, shdr->MessageId,
 222                  shdr->ProcessId);
 223         cifs_dbg(VFS, "smb buf %p len %u\n", buf,
 224                  server->ops->calc_smb_size(buf, server));
 225 #endif
 226 }
 227
 228 static bool
 229 smb2_need_neg(struct TCP_Server_Info *server)
 230 {
 231         return server->max_read == 0;
 232 }
 233
 234 static int
 235 smb2_negotiate(const unsigned int xid, struct cifs_ses *ses)
 236 {
 237         int rc;
 238         ses->server->CurrentMid = 0;
 239         rc = SMB2_negotiate(xid, ses);
 240         /* BB we probably don't need to retry with modern servers */
 241         if (rc == -EAGAIN)
 242                 rc = -EHOSTDOWN;
 243         return rc;
 244 }
 245
 246 static unsigned int
 247 smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 248 {
 249         struct TCP_Server_Info *server = tcon->ses->server;
 250         unsigned int wsize;
 251
 252         /* start with specified wsize, or default */
 253         wsize = volume_info->wsize ? volume_info->wsize : CIFS_DEFAULT_IOSIZE;
 254         wsize = min_t(unsigned int, wsize, server->max_write);
 255 #ifdef CONFIG_CIFS_SMB_DIRECT
 256         if (server->rdma) {
 257                 if (server->sign)
 258                         wsize = min_t(unsigned int,
 259                                 wsize, server->smbd_conn->max_fragmented_send_size);
 260                 else
 261                         wsize = min_t(unsigned int,
 262                                 wsize, server->smbd_conn->max_readwrite_size);
 263         }
 264 #endif
 265         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 266                 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
 267
 268         return wsize;
 269 }
 270
 271 static unsigned int
 272 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 273 {
 274         struct TCP_Server_Info *server = tcon->ses->server;
 275         unsigned int rsize;
 276
 277         /* start with specified rsize, or default */
 278         rsize = volume_info->rsize ? volume_info->rsize : CIFS_DEFAULT_IOSIZE;
 279         rsize = min_t(unsigned int, rsize, server->max_read);
 280 #ifdef CONFIG_CIFS_SMB_DIRECT
 281         if (server->rdma) {
 282                 if (server->sign)
 283                         rsize = min_t(unsigned int,
 284                                 rsize, server->smbd_conn->max_fragmented_recv_size);
 285                 else
 286                         rsize = min_t(unsigned int,
 287                                 rsize, server->smbd_conn->max_readwrite_size);
 288         }
 289 #endif
 290
 291         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 292                 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
 293
 294         return rsize;
 295 }
 296
 297 #ifdef CONFIG_CIFS_STATS2
 298 static int
 299 SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon)
 300 {
 301         int rc;
 302         unsigned int ret_data_len = 0;
 303         struct network_interface_info_ioctl_rsp *out_buf;
 304
 305         rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
 306                         FSCTL_QUERY_NETWORK_INTERFACE_INFO, true /* is_fsctl */,
 307                         NULL /* no data input */, 0 /* no data input */,
 308                         (char **)&out_buf, &ret_data_len);
 309         if (rc != 0)
 310                 cifs_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
 311         else if (ret_data_len < sizeof(struct network_interface_info_ioctl_rsp)) {
 312                 cifs_dbg(VFS, "server returned bad net interface info buf\n");
 313                 rc = -EINVAL;
 314         } else {
 315                 /* Dump info on first interface */
 316                 cifs_dbg(FYI, "Adapter Capability 0x%x\t",
 317                         le32_to_cpu(out_buf->Capability));
 318                 cifs_dbg(FYI, "Link Speed %lld\n",
 319                         le64_to_cpu(out_buf->LinkSpeed));
 320         }
 321         kfree(out_buf);
 322         return rc;
 323 }
 324 #endif /* STATS2 */
 325
 326 /*
 327  * Open the directory at the root of a share
 328  */
 329 int open_shroot(unsigned int xid, struct cifs_tcon *tcon, struct cifs_fid *pfid)
 330 {
 331         struct cifs_open_parms oparams;
 332         int rc;
 333         __le16 srch_path = 0; /* Null - since an open of top of share */
 334         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 335
 336         mutex_lock(&tcon->prfid_mutex);
 337         if (tcon->valid_root_fid) {
 338                 cifs_dbg(FYI, "found a cached root file handle\n");
 339                 memcpy(pfid, tcon->prfid, sizeof(struct cifs_fid));
 340                 mutex_unlock(&tcon->prfid_mutex);
 341                 return 0;
 342         }
 343
 344         oparams.tcon = tcon;
 345         oparams.create_options = 0;
 346         oparams.desired_access = FILE_READ_ATTRIBUTES;
 347         oparams.disposition = FILE_OPEN;
 348         oparams.fid = pfid;
 349         oparams.reconnect = false;
 350
 351         rc = SMB2_open(xid, &oparams, &srch_path, &oplock, NULL, NULL);
 352         if (rc == 0) {
 353                 memcpy(tcon->prfid, pfid, sizeof(struct cifs_fid));
 354                 tcon->valid_root_fid = true;
 355         }
 356         mutex_unlock(&tcon->prfid_mutex);
 357         return rc;
 358 }
 359
 360 static void
 361 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
 362 {
 363         int rc;
 364         __le16 srch_path = 0; /* Null - open root of share */
 365         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 366         struct cifs_open_parms oparms;
 367         struct cifs_fid fid;
 368         bool no_cached_open = tcon->nohandlecache;
 369
 370         oparms.tcon = tcon;
 371         oparms.desired_access = FILE_READ_ATTRIBUTES;
 372         oparms.disposition = FILE_OPEN;
 373         oparms.create_options = 0;
 374         oparms.fid = &fid;
 375         oparms.reconnect = false;
 376
 377         if (no_cached_open)
 378                 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
 379         else
 380                 rc = open_shroot(xid, tcon, &fid);
 381
 382         if (rc)
 383                 return;
 384
 385 #ifdef CONFIG_CIFS_STATS2
 386         SMB3_request_interfaces(xid, tcon);
 387 #endif /* STATS2 */
 388
 389         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 390                         FS_ATTRIBUTE_INFORMATION);
 391         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 392                         FS_DEVICE_INFORMATION);
 393         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 394                         FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
 395         if (no_cached_open)
 396                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 397         return;
 398 }
 399
 400 static void
 401 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
 402 {
 403         int rc;
 404         __le16 srch_path = 0; /* Null - open root of share */
 405         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 406         struct cifs_open_parms oparms;
 407         struct cifs_fid fid;
 408
 409         oparms.tcon = tcon;
 410         oparms.desired_access = FILE_READ_ATTRIBUTES;
 411         oparms.disposition = FILE_OPEN;
 412         oparms.create_options = 0;
 413         oparms.fid = &fid;
 414         oparms.reconnect = false;
 415
 416         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
 417         if (rc)
 418                 return;
 419
 420         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 421                         FS_ATTRIBUTE_INFORMATION);
 422         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 423                         FS_DEVICE_INFORMATION);
 424         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 425         return;
 426 }
 427
 428 static int
 429 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
 430                         struct cifs_sb_info *cifs_sb, const char *full_path)
 431 {
 432         int rc;
 433         __le16 *utf16_path;
 434         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 435         struct cifs_open_parms oparms;
 436         struct cifs_fid fid;
 437
 438         if ((*full_path == 0) && tcon->valid_root_fid)
 439                 return 0;
 440
 441         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
 442         if (!utf16_path)
 443                 return -ENOMEM;
 444
 445         oparms.tcon = tcon;
 446         oparms.desired_access = FILE_READ_ATTRIBUTES;
 447         oparms.disposition = FILE_OPEN;
 448         oparms.create_options = 0;
 449         oparms.fid = &fid;
 450         oparms.reconnect = false;
 451
 452         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
 453         if (rc) {
 454                 kfree(utf16_path);
 455                 return rc;
 456         }
 457
 458         rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 459         kfree(utf16_path);
 460         return rc;
 461 }
 462
 463 static int
 464 smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
 465                   struct cifs_sb_info *cifs_sb, const char *full_path,
 466                   u64 *uniqueid, FILE_ALL_INFO *data)
 467 {
 468         *uniqueid = le64_to_cpu(data->IndexNumber);
 469         return 0;
 470 }
 471
 472 static int
 473 smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
 474                      struct cifs_fid *fid, FILE_ALL_INFO *data)
 475 {
 476         int rc;
 477         struct smb2_file_all_info *smb2_data;
 478
 479         smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
 480                             GFP_KERNEL);
 481         if (smb2_data == NULL)
 482                 return -ENOMEM;
 483
 484         rc = SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid,
 485                              smb2_data);
 486         if (!rc)
 487                 move_smb2_info_to_cifs(data, smb2_data);
 488         kfree(smb2_data);
 489         return rc;
 490 }
 491
 492 #ifdef CONFIG_CIFS_XATTR
 493 static ssize_t
 494 move_smb2_ea_to_cifs(char *dst, size_t dst_size,
 495                      struct smb2_file_full_ea_info *src, size_t src_size,
 496                      const unsigned char *ea_name)
 497 {
 498         int rc = 0;
 499         unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0;
 500         char *name, *value;
 501         size_t name_len, value_len, user_name_len;
 502
 503         while (src_size > 0) {
 504                 name = &src->ea_data[0];
 505                 name_len = (size_t)src->ea_name_length;
 506                 value = &src->ea_data[src->ea_name_length + 1];
 507                 value_len = (size_t)le16_to_cpu(src->ea_value_length);
 508
 509                 if (name_len == 0) {
 510                         break;
 511                 }
 512
 513                 if (src_size < 8 + name_len + 1 + value_len) {
 514                         cifs_dbg(FYI, "EA entry goes beyond length of list\n");
 515                         rc = -EIO;
 516                         goto out;
 517                 }
 518
 519                 if (ea_name) {
 520                         if (ea_name_len == name_len &&
 521                             memcmp(ea_name, name, name_len) == 0) {
 522                                 rc = value_len;
 523                                 if (dst_size == 0)
 524                                         goto out;
 525                                 if (dst_size < value_len) {
 526                                         rc = -ERANGE;
 527                                         goto out;
 528                                 }
 529                                 memcpy(dst, value, value_len);
 530                                 goto out;
 531                         }
 532                 } else {
 533                         /* 'user.' plus a terminating null */
 534                         user_name_len = 5 + 1 + name_len;
 535
 536                         rc += user_name_len;
 537
 538                         if (dst_size >= user_name_len) {
 539                                 dst_size -= user_name_len;
 540                                 memcpy(dst, "user.", 5);
 541                                 dst += 5;
 542                                 memcpy(dst, src->ea_data, name_len);
 543                                 dst += name_len;
 544                                 *dst = 0;
 545                                 ++dst;
 546                         } else if (dst_size == 0) {
 547                                 /* skip copy - calc size only */
 548                         } else {
 549                                 /* stop before overrun buffer */
 550                                 rc = -ERANGE;
 551                                 break;
 552                         }
 553                 }
 554
 555                 if (!src->next_entry_offset)
 556                         break;
 557
 558                 if (src_size < le32_to_cpu(src->next_entry_offset)) {
 559                         /* stop before overrun buffer */
 560                         rc = -ERANGE;
 561                         break;
 562                 }
 563                 src_size -= le32_to_cpu(src->next_entry_offset);
 564                 src = (void *)((char *)src +
 565                                le32_to_cpu(src->next_entry_offset));
 566         }
 567
 568         /* didn't find the named attribute */
 569         if (ea_name)
 570                 rc = -ENODATA;
 571
 572 out:
 573         return (ssize_t)rc;
 574 }
 575
 576 static ssize_t
 577 smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon,
 578                const unsigned char *path, const unsigned char *ea_name,
 579                char *ea_data, size_t buf_size,
 580                struct cifs_sb_info *cifs_sb)
 581 {
 582         int rc;
 583         __le16 *utf16_path;
 584         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 585         struct cifs_open_parms oparms;
 586         struct cifs_fid fid;
 587         struct smb2_file_full_ea_info *smb2_data;
 588         int ea_buf_size = SMB2_MIN_EA_BUF;
 589
 590         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
 591         if (!utf16_path)
 592                 return -ENOMEM;
 593
 594         oparms.tcon = tcon;
 595         oparms.desired_access = FILE_READ_EA;
 596         oparms.disposition = FILE_OPEN;
 597         oparms.create_options = 0;
 598         oparms.fid = &fid;
 599         oparms.reconnect = false;
 600
 601         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
 602         kfree(utf16_path);
 603         if (rc) {
 604                 cifs_dbg(FYI, "open failed rc=%d\n", rc);
 605                 return rc;
 606         }
 607
 608         while (1) {
 609                 smb2_data = kzalloc(ea_buf_size, GFP_KERNEL);
 610                 if (smb2_data == NULL) {
 611                         SMB2_close(xid, tcon, fid.persistent_fid,
 612                                    fid.volatile_fid);
 613                         return -ENOMEM;
 614                 }
 615
 616                 rc = SMB2_query_eas(xid, tcon, fid.persistent_fid,
 617                                     fid.volatile_fid,
 618                                     ea_buf_size, smb2_data);
 619
 620                 if (rc != -E2BIG)
 621                         break;
 622
 623                 kfree(smb2_data);
 624                 ea_buf_size <<= 1;
 625
 626                 if (ea_buf_size > SMB2_MAX_EA_BUF) {
 627                         cifs_dbg(VFS, "EA size is too large\n");
 628                         SMB2_close(xid, tcon, fid.persistent_fid,
 629                                    fid.volatile_fid);
 630                         return -ENOMEM;
 631                 }
 632         }
 633
 634         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 635
 636         /*
 637          * If ea_name is NULL (listxattr) and there are no EAs, return 0 as it's
 638          * not an error. Otherwise, the specified ea_name was not found.
 639          */
 640         if (!rc)
 641                 rc = move_smb2_ea_to_cifs(ea_data, buf_size, smb2_data,
 642                                           SMB2_MAX_EA_BUF, ea_name);
 643         else if (!ea_name && rc == -ENODATA)
 644                 rc = 0;
 645
 646         kfree(smb2_data);
 647         return rc;
 648 }
 649
 650
 651 static int
 652 smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
 653             const char *path, const char *ea_name, const void *ea_value,
 654             const __u16 ea_value_len, const struct nls_table *nls_codepage,
 655             struct cifs_sb_info *cifs_sb)
 656 {
 657         int rc;
 658         __le16 *utf16_path;
 659         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 660         struct cifs_open_parms oparms;
 661         struct cifs_fid fid;
 662         struct smb2_file_full_ea_info *ea;
 663         int ea_name_len = strlen(ea_name);
 664         int len;
 665
 666         if (ea_name_len > 255)
 667                 return -EINVAL;
 668
 669         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
 670         if (!utf16_path)
 671                 return -ENOMEM;
 672
 673         oparms.tcon = tcon;
 674         oparms.desired_access = FILE_WRITE_EA;
 675         oparms.disposition = FILE_OPEN;
 676         oparms.create_options = 0;
 677         oparms.fid = &fid;
 678         oparms.reconnect = false;
 679
 680         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
 681         kfree(utf16_path);
 682         if (rc) {
 683                 cifs_dbg(FYI, "open failed rc=%d\n", rc);
 684                 return rc;
 685         }
 686
 687         len = sizeof(ea) + ea_name_len + ea_value_len + 1;
 688         ea = kzalloc(len, GFP_KERNEL);
 689         if (ea == NULL) {
 690                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 691                 return -ENOMEM;
 692         }
 693
 694         ea->ea_name_length = ea_name_len;
 695         ea->ea_value_length = cpu_to_le16(ea_value_len);
 696         memcpy(ea->ea_data, ea_name, ea_name_len + 1);
 697         memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len);
 698
 699         rc = SMB2_set_ea(xid, tcon, fid.persistent_fid, fid.volatile_fid, ea,
 700                          len);
 701         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 702
 703         return rc;
 704 }
 705 #endif
 706
 707 static bool
 708 smb2_can_echo(struct TCP_Server_Info *server)
 709 {
 710         return server->echoes;
 711 }
 712
 713 static void
 714 smb2_clear_stats(struct cifs_tcon *tcon)
 715 {
 716 #ifdef CONFIG_CIFS_STATS
 717         int i;
 718         for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
 719                 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
 720                 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
 721         }
 722 #endif
 723 }
 724
 725 static void
 726 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
 727 {
 728         seq_puts(m, "\n\tShare Capabilities:");
 729         if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
 730                 seq_puts(m, " DFS,");
 731         if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
 732                 seq_puts(m, " CONTINUOUS AVAILABILITY,");
 733         if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
 734                 seq_puts(m, " SCALEOUT,");
 735         if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
 736                 seq_puts(m, " CLUSTER,");
 737         if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
 738                 seq_puts(m, " ASYMMETRIC,");
 739         if (tcon->capabilities == 0)
 740                 seq_puts(m, " None");
 741         if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
 742                 seq_puts(m, " Aligned,");
 743         if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
 744                 seq_puts(m, " Partition Aligned,");
 745         if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
 746                 seq_puts(m, " SSD,");
 747         if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
 748                 seq_puts(m, " TRIM-support,");
 749
 750         seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
 751         seq_printf(m, "\n\ttid: 0x%x", tcon->tid);
 752         if (tcon->perf_sector_size)
 753                 seq_printf(m, "\tOptimal sector size: 0x%x",
 754                            tcon->perf_sector_size);
 755         seq_printf(m, "\tMaximal Access: 0x%x", tcon->maximal_access);
 756 }
 757
 758 static void
 759 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
 760 {
 761 #ifdef CONFIG_CIFS_STATS
 762         atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
 763         atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
 764         seq_printf(m, "\nNegotiates: %d sent %d failed",
 765                    atomic_read(&sent[SMB2_NEGOTIATE_HE]),
 766                    atomic_read(&failed[SMB2_NEGOTIATE_HE]));
 767         seq_printf(m, "\nSessionSetups: %d sent %d failed",
 768                    atomic_read(&sent[SMB2_SESSION_SETUP_HE]),
 769                    atomic_read(&failed[SMB2_SESSION_SETUP_HE]));
 770         seq_printf(m, "\nLogoffs: %d sent %d failed",
 771                    atomic_read(&sent[SMB2_LOGOFF_HE]),
 772                    atomic_read(&failed[SMB2_LOGOFF_HE]));
 773         seq_printf(m, "\nTreeConnects: %d sent %d failed",
 774                    atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
 775                    atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
 776         seq_printf(m, "\nTreeDisconnects: %d sent %d failed",
 777                    atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
 778                    atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
 779         seq_printf(m, "\nCreates: %d sent %d failed",
 780                    atomic_read(&sent[SMB2_CREATE_HE]),
 781                    atomic_read(&failed[SMB2_CREATE_HE]));
 782         seq_printf(m, "\nCloses: %d sent %d failed",
 783                    atomic_read(&sent[SMB2_CLOSE_HE]),
 784                    atomic_read(&failed[SMB2_CLOSE_HE]));
 785         seq_printf(m, "\nFlushes: %d sent %d failed",
 786                    atomic_read(&sent[SMB2_FLUSH_HE]),
 787                    atomic_read(&failed[SMB2_FLUSH_HE]));
 788         seq_printf(m, "\nReads: %d sent %d failed",
 789                    atomic_read(&sent[SMB2_READ_HE]),
 790                    atomic_read(&failed[SMB2_READ_HE]));
 791         seq_printf(m, "\nWrites: %d sent %d failed",
 792                    atomic_read(&sent[SMB2_WRITE_HE]),
 793                    atomic_read(&failed[SMB2_WRITE_HE]));
 794         seq_printf(m, "\nLocks: %d sent %d failed",
 795                    atomic_read(&sent[SMB2_LOCK_HE]),
 796                    atomic_read(&failed[SMB2_LOCK_HE]));
 797         seq_printf(m, "\nIOCTLs: %d sent %d failed",
 798                    atomic_read(&sent[SMB2_IOCTL_HE]),
 799                    atomic_read(&failed[SMB2_IOCTL_HE]));
 800         seq_printf(m, "\nCancels: %d sent %d failed",
 801                    atomic_read(&sent[SMB2_CANCEL_HE]),
 802                    atomic_read(&failed[SMB2_CANCEL_HE]));
 803         seq_printf(m, "\nEchos: %d sent %d failed",
 804                    atomic_read(&sent[SMB2_ECHO_HE]),
 805                    atomic_read(&failed[SMB2_ECHO_HE]));
 806         seq_printf(m, "\nQueryDirectories: %d sent %d failed",
 807                    atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
 808                    atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
 809         seq_printf(m, "\nChangeNotifies: %d sent %d failed",
 810                    atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
 811                    atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
 812         seq_printf(m, "\nQueryInfos: %d sent %d failed",
 813                    atomic_read(&sent[SMB2_QUERY_INFO_HE]),
 814                    atomic_read(&failed[SMB2_QUERY_INFO_HE]));
 815         seq_printf(m, "\nSetInfos: %d sent %d failed",
 816                    atomic_read(&sent[SMB2_SET_INFO_HE]),
 817                    atomic_read(&failed[SMB2_SET_INFO_HE]));
 818         seq_printf(m, "\nOplockBreaks: %d sent %d failed",
 819                    atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
 820                    atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
 821 #endif
 822 }
 823
 824 static void
 825 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
 826 {
 827         struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
 828         struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
 829
 830         cfile->fid.persistent_fid = fid->persistent_fid;
 831         cfile->fid.volatile_fid = fid->volatile_fid;
 832         server->ops->set_oplock_level(cinode, oplock, fid->epoch,
 833                                       &fid->purge_cache);
 834         cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
 835         memcpy(cfile->fid.create_guid, fid->create_guid, 16);
 836 }
 837
 838 static void
 839 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
 840                 struct cifs_fid *fid)
 841 {
 842         SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 843 }
 844
 845 static int
 846 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
 847                      u64 persistent_fid, u64 volatile_fid,
 848                      struct copychunk_ioctl *pcchunk)
 849 {
 850         int rc;
 851         unsigned int ret_data_len;
 852         struct resume_key_req *res_key;
 853
 854         rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
 855                         FSCTL_SRV_REQUEST_RESUME_KEY, true /* is_fsctl */,
 856                         NULL, 0 /* no input */,
 857                         (char **)&res_key, &ret_data_len);
 858
 859         if (rc) {
 860                 cifs_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
 861                 goto req_res_key_exit;
 862         }
 863         if (ret_data_len < sizeof(struct resume_key_req)) {
 864                 cifs_dbg(VFS, "Invalid refcopy resume key length\n");
 865                 rc = -EINVAL;
 866                 goto req_res_key_exit;
 867         }
 868         memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
 869
 870 req_res_key_exit:
 871         kfree(res_key);
 872         return rc;
 873 }
 874
 875 static ssize_t
 876 smb2_copychunk_range(const unsigned int xid,
 877                         struct cifsFileInfo *srcfile,
 878                         struct cifsFileInfo *trgtfile, u64 src_off,
 879                         u64 len, u64 dest_off)
 880 {
 881         int rc;
 882         unsigned int ret_data_len;
 883         struct copychunk_ioctl *pcchunk;
 884         struct copychunk_ioctl_rsp *retbuf = NULL;
 885         struct cifs_tcon *tcon;
 886         int chunks_copied = 0;
 887         bool chunk_sizes_updated = false;
 888         ssize_t bytes_written, total_bytes_written = 0;
 889
 890         pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
 891
 892         if (pcchunk == NULL)
 893                 return -ENOMEM;
 894
 895         cifs_dbg(FYI, "in smb2_copychunk_range - about to call request res key\n");
 896         /* Request a key from the server to identify the source of the copy */
 897         rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
 898                                 srcfile->fid.persistent_fid,
 899                                 srcfile->fid.volatile_fid, pcchunk);
 900
 901         /* Note: request_res_key sets res_key null only if rc !=0 */
 902         if (rc)
 903                 goto cchunk_out;
 904
 905         /* For now array only one chunk long, will make more flexible later */
 906         pcchunk->ChunkCount = cpu_to_le32(1);
 907         pcchunk->Reserved = 0;
 908         pcchunk->Reserved2 = 0;
 909
 910         tcon = tlink_tcon(trgtfile->tlink);
 911
 912         while (len > 0) {
 913                 pcchunk->SourceOffset = cpu_to_le64(src_off);
 914                 pcchunk->TargetOffset = cpu_to_le64(dest_off);
 915                 pcchunk->Length =
 916                         cpu_to_le32(min_t(u32, len, tcon->max_bytes_chunk));
 917
 918                 /* Request server copy to target from src identified by key */
 919                 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
 920                         trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
 921                         true /* is_fsctl */, (char *)pcchunk,
 922                         sizeof(struct copychunk_ioctl), (char **)&retbuf,
 923                         &ret_data_len);
 924                 if (rc == 0) {
 925                         if (ret_data_len !=
 926                                         sizeof(struct copychunk_ioctl_rsp)) {
 927                                 cifs_dbg(VFS, "invalid cchunk response size\n");
 928                                 rc = -EIO;
 929                                 goto cchunk_out;
 930                         }
 931                         if (retbuf->TotalBytesWritten == 0) {
 932                                 cifs_dbg(FYI, "no bytes copied\n");
 933                                 rc = -EIO;
 934                                 goto cchunk_out;
 935                         }
 936                         /*
 937                          * Check if server claimed to write more than we asked
 938                          */
 939                         if (le32_to_cpu(retbuf->TotalBytesWritten) >
 940                             le32_to_cpu(pcchunk->Length)) {
 941                                 cifs_dbg(VFS, "invalid copy chunk response\n");
 942                                 rc = -EIO;
 943                                 goto cchunk_out;
 944                         }
 945                         if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
 946                                 cifs_dbg(VFS, "invalid num chunks written\n");
 947                                 rc = -EIO;
 948                                 goto cchunk_out;
 949                         }
 950                         chunks_copied++;
 951
 952                         bytes_written = le32_to_cpu(retbuf->TotalBytesWritten);
 953                         src_off += bytes_written;
 954                         dest_off += bytes_written;
 955                         len -= bytes_written;
 956                         total_bytes_written += bytes_written;
 957
 958                         cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n",
 959                                 le32_to_cpu(retbuf->ChunksWritten),
 960                                 le32_to_cpu(retbuf->ChunkBytesWritten),
 961                                 bytes_written);
 962                 } else if (rc == -EINVAL) {
 963                         if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
 964                                 goto cchunk_out;
 965
 966                         cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
 967                                 le32_to_cpu(retbuf->ChunksWritten),
 968                                 le32_to_cpu(retbuf->ChunkBytesWritten),
 969                                 le32_to_cpu(retbuf->TotalBytesWritten));
 970
 971                         /*
 972                          * Check if this is the first request using these sizes,
 973                          * (ie check if copy succeed once with original sizes
 974                          * and check if the server gave us different sizes after
 975                          * we already updated max sizes on previous request).
 976                          * if not then why is the server returning an error now
 977                          */
 978                         if ((chunks_copied != 0) || chunk_sizes_updated)
 979                                 goto cchunk_out;
 980
 981                         /* Check that server is not asking us to grow size */
 982                         if (le32_to_cpu(retbuf->ChunkBytesWritten) <
 983                                         tcon->max_bytes_chunk)
 984                                 tcon->max_bytes_chunk =
 985                                         le32_to_cpu(retbuf->ChunkBytesWritten);
 986                         else
 987                                 goto cchunk_out; /* server gave us bogus size */
 988
 989                         /* No need to change MaxChunks since already set to 1 */
 990                         chunk_sizes_updated = true;
 991                 } else
 992                         goto cchunk_out;
 993         }
 994
 995 cchunk_out:
 996         kfree(pcchunk);
 997         kfree(retbuf);
 998         if (rc)
 999                 return rc;
1000         else
1001                 return total_bytes_written;
1002 }
1003
1004 static int
1005 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
1006                 struct cifs_fid *fid)
1007 {
1008         return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1009 }
1010
1011 static unsigned int
1012 smb2_read_data_offset(char *buf)
1013 {
1014         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1015         return rsp->DataOffset;
1016 }
1017
1018 static unsigned int
1019 smb2_read_data_length(char *buf, bool in_remaining)
1020 {
1021         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1022
1023         if (in_remaining)
1024                 return le32_to_cpu(rsp->DataRemaining);
1025
1026         return le32_to_cpu(rsp->DataLength);
1027 }
1028
1029
1030 static int
1031 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,
1032                struct cifs_io_parms *parms, unsigned int *bytes_read,
1033                char **buf, int *buf_type)
1034 {
1035         parms->persistent_fid = pfid->persistent_fid;
1036         parms->volatile_fid = pfid->volatile_fid;
1037         return SMB2_read(xid, parms, bytes_read, buf, buf_type);
1038 }
1039
1040 static int
1041 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,
1042                 struct cifs_io_parms *parms, unsigned int *written,
1043                 struct kvec *iov, unsigned long nr_segs)
1044 {
1045
1046         parms->persistent_fid = pfid->persistent_fid;
1047         parms->volatile_fid = pfid->volatile_fid;
1048         return SMB2_write(xid, parms, written, iov, nr_segs);
1049 }
1050
1051 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
1052 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
1053                 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
1054 {
1055         struct cifsInodeInfo *cifsi;
1056         int rc;
1057
1058         cifsi = CIFS_I(inode);
1059
1060         /* if file already sparse don't bother setting sparse again */
1061         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
1062                 return true; /* already sparse */
1063
1064         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
1065                 return true; /* already not sparse */
1066
1067         /*
1068          * Can't check for sparse support on share the usual way via the
1069          * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
1070          * since Samba server doesn't set the flag on the share, yet
1071          * supports the set sparse FSCTL and returns sparse correctly
1072          * in the file attributes. If we fail setting sparse though we
1073          * mark that server does not support sparse files for this share
1074          * to avoid repeatedly sending the unsupported fsctl to server
1075          * if the file is repeatedly extended.
1076          */
1077         if (tcon->broken_sparse_sup)
1078                 return false;
1079
1080         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1081                         cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
1082                         true /* is_fctl */,
1083                         &setsparse, 1, NULL, NULL);
1084         if (rc) {
1085                 tcon->broken_sparse_sup = true;
1086                 cifs_dbg(FYI, "set sparse rc = %d\n", rc);
1087                 return false;
1088         }
1089
1090         if (setsparse)
1091                 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
1092         else
1093                 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
1094
1095         return true;
1096 }
1097
1098 static int
1099 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
1100                    struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
1101 {
1102         __le64 eof = cpu_to_le64(size);
1103         struct inode *inode;
1104
1105         /*
1106          * If extending file more than one page make sparse. Many Linux fs
1107          * make files sparse by default when extending via ftruncate
1108          */
1109         inode = d_inode(cfile->dentry);
1110
1111         if (!set_alloc && (size > inode->i_size + 8192)) {
1112                 __u8 set_sparse = 1;
1113
1114                 /* whether set sparse succeeds or not, extend the file */
1115                 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
1116         }
1117
1118         return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
1119                             cfile->fid.volatile_fid, cfile->pid, &eof, false);
1120 }
1121
1122 static int
1123 smb2_duplicate_extents(const unsigned int xid,
1124                         struct cifsFileInfo *srcfile,
1125                         struct cifsFileInfo *trgtfile, u64 src_off,
1126                         u64 len, u64 dest_off)
1127 {
1128         int rc;
1129         unsigned int ret_data_len;
1130         struct duplicate_extents_to_file dup_ext_buf;
1131         struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink);
1132
1133         /* server fileays advertise duplicate extent support with this flag */
1134         if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) &
1135              FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0)
1136                 return -EOPNOTSUPP;
1137
1138         dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid;
1139         dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid;
1140         dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off);
1141         dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off);
1142         dup_ext_buf.ByteCount = cpu_to_le64(len);
1143         cifs_dbg(FYI, "duplicate extents: src off %lld dst off %lld len %lld",
1144                 src_off, dest_off, len);
1145
1146         rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false);
1147         if (rc)
1148                 goto duplicate_extents_out;
1149
1150         rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1151                         trgtfile->fid.volatile_fid,
1152                         FSCTL_DUPLICATE_EXTENTS_TO_FILE,
1153                         true /* is_fsctl */,
1154                         (char *)&dup_ext_buf,
1155                         sizeof(struct duplicate_extents_to_file),
1156                         NULL,
1157                         &ret_data_len);
1158
1159         if (ret_data_len > 0)
1160                 cifs_dbg(FYI, "non-zero response length in duplicate extents");
1161
1162 duplicate_extents_out:
1163         return rc;
1164 }
1165
1166 static int
1167 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
1168                    struct cifsFileInfo *cfile)
1169 {
1170         return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
1171                             cfile->fid.volatile_fid);
1172 }
1173
1174 static int
1175 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
1176                    struct cifsFileInfo *cfile)
1177 {
1178         struct fsctl_set_integrity_information_req integr_info;
1179         unsigned int ret_data_len;
1180
1181         integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED);
1182         integr_info.Flags = 0;
1183         integr_info.Reserved = 0;
1184
1185         return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1186                         cfile->fid.volatile_fid,
1187                         FSCTL_SET_INTEGRITY_INFORMATION,
1188                         true /* is_fsctl */,
1189                         (char *)&integr_info,
1190                         sizeof(struct fsctl_set_integrity_information_req),
1191                         NULL,
1192                         &ret_data_len);
1193
1194 }
1195
1196 static int
1197 smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon,
1198                    struct cifsFileInfo *cfile, void __user *ioc_buf)
1199 {
1200         char *retbuf = NULL;
1201         unsigned int ret_data_len = 0;
1202         int rc;
1203         struct smb_snapshot_array snapshot_in;
1204
1205         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1206                         cfile->fid.volatile_fid,
1207                         FSCTL_SRV_ENUMERATE_SNAPSHOTS,
1208                         true /* is_fsctl */,
1209                         NULL, 0 /* no input data */,
1210                         (char **)&retbuf,
1211                         &ret_data_len);
1212         cifs_dbg(FYI, "enum snaphots ioctl returned %d and ret buflen is %d\n",
1213                         rc, ret_data_len);
1214         if (rc)
1215                 return rc;
1216
1217         if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) {
1218                 /* Fixup buffer */
1219                 if (copy_from_user(&snapshot_in, ioc_buf,
1220                     sizeof(struct smb_snapshot_array))) {
1221                         rc = -EFAULT;
1222                         kfree(retbuf);
1223                         return rc;
1224                 }
1225                 if (snapshot_in.snapshot_array_size < sizeof(struct smb_snapshot_array)) {
1226                         rc = -ERANGE;
1227                         kfree(retbuf);
1228                         return rc;
1229                 }
1230
1231                 if (ret_data_len > snapshot_in.snapshot_array_size)
1232                         ret_data_len = snapshot_in.snapshot_array_size;
1233
1234                 if (copy_to_user(ioc_buf, retbuf, ret_data_len))
1235                         rc = -EFAULT;
1236         }
1237
1238         kfree(retbuf);
1239         return rc;
1240 }
1241
1242 static int
1243 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
1244                      const char *path, struct cifs_sb_info *cifs_sb,
1245                      struct cifs_fid *fid, __u16 search_flags,
1246                      struct cifs_search_info *srch_inf)
1247 {
1248         __le16 *utf16_path;
1249         int rc;
1250         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1251         struct cifs_open_parms oparms;
1252
1253         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1254         if (!utf16_path)
1255                 return -ENOMEM;
1256
1257         oparms.tcon = tcon;
1258         oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
1259         oparms.disposition = FILE_OPEN;
1260         oparms.create_options = 0;
1261         oparms.fid = fid;
1262         oparms.reconnect = false;
1263
1264         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
1265         kfree(utf16_path);
1266         if (rc) {
1267                 cifs_dbg(FYI, "open dir failed rc=%d\n", rc);
1268                 return rc;
1269         }
1270
1271         srch_inf->entries_in_buffer = 0;
1272         srch_inf->index_of_last_entry = 0;
1273
1274         rc = SMB2_query_directory(xid, tcon, fid->persistent_fid,
1275                                   fid->volatile_fid, 0, srch_inf);
1276         if (rc) {
1277                 cifs_dbg(FYI, "query directory failed rc=%d\n", rc);
1278                 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1279         }
1280         return rc;
1281 }
1282
1283 static int
1284 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
1285                     struct cifs_fid *fid, __u16 search_flags,
1286                     struct cifs_search_info *srch_inf)
1287 {
1288         return SMB2_query_directory(xid, tcon, fid->persistent_fid,
1289                                     fid->volatile_fid, 0, srch_inf);
1290 }
1291
1292 static int
1293 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
1294                struct cifs_fid *fid)
1295 {
1296         return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1297 }
1298
1299 /*
1300 * If we negotiate SMB2 protocol and get STATUS_PENDING - update
1301 * the number of credits and return true. Otherwise - return false.
1302 */
1303 static bool
1304 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server, int length)
1305 {
1306         struct smb2_sync_hdr *shdr = get_sync_hdr(buf);
1307
1308         if (shdr->Status != STATUS_PENDING)
1309                 return false;
1310
1311         if (!length) {
1312                 spin_lock(&server->req_lock);
1313                 server->credits += le16_to_cpu(shdr->CreditRequest);
1314                 spin_unlock(&server->req_lock);
1315                 wake_up(&server->request_q);
1316         }
1317
1318         return true;
1319 }
1320
1321 static bool
1322 smb2_is_session_expired(char *buf)
1323 {
1324         struct smb2_sync_hdr *shdr = get_sync_hdr(buf);
1325
1326         if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED)
1327                 return false;
1328
1329         cifs_dbg(FYI, "Session expired\n");
1330         return true;
1331 }
1332
1333 static int
1334 smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
1335                      struct cifsInodeInfo *cinode)
1336 {
1337         if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
1338                 return SMB2_lease_break(0, tcon, cinode->lease_key,
1339                                         smb2_get_lease_state(cinode));
1340
1341         return SMB2_oplock_break(0, tcon, fid->persistent_fid,
1342                                  fid->volatile_fid,
1343                                  CIFS_CACHE_READ(cinode) ? 1 : 0);
1344 }
1345
1346 static int
1347 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
1348              struct kstatfs *buf)
1349 {
1350         int rc;
1351         __le16 srch_path = 0; /* Null - open root of share */
1352         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1353         struct cifs_open_parms oparms;
1354         struct cifs_fid fid;
1355
1356         oparms.tcon = tcon;
1357         oparms.desired_access = FILE_READ_ATTRIBUTES;
1358         oparms.disposition = FILE_OPEN;
1359         oparms.create_options = 0;
1360         oparms.fid = &fid;
1361         oparms.reconnect = false;
1362
1363         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
1364         if (rc)
1365                 return rc;
1366         buf->f_type = SMB2_MAGIC_NUMBER;
1367         rc = SMB2_QFS_info(xid, tcon, fid.persistent_fid, fid.volatile_fid,
1368                            buf);
1369         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
1370         return rc;
1371 }
1372
1373 static bool
1374 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
1375 {
1376         return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
1377                ob1->fid.volatile_fid == ob2->fid.volatile_fid;
1378 }
1379
1380 static int
1381 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
1382                __u64 length, __u32 type, int lock, int unlock, bool wait)
1383 {
1384         if (unlock && !lock)
1385                 type = SMB2_LOCKFLAG_UNLOCK;
1386         return SMB2_lock(xid, tlink_tcon(cfile->tlink),
1387                          cfile->fid.persistent_fid, cfile->fid.volatile_fid,
1388                          current->tgid, length, offset, type, wait);
1389 }
1390
1391 static void
1392 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
1393 {
1394         memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
1395 }
1396
1397 static void
1398 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
1399 {
1400         memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
1401 }
1402
1403 static void
1404 smb2_new_lease_key(struct cifs_fid *fid)
1405 {
1406         generate_random_uuid(fid->lease_key);
1407 }
1408
1409 static int
1410 smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,
1411                    const char *search_name,
1412                    struct dfs_info3_param **target_nodes,
1413                    unsigned int *num_of_nodes,
1414                    const struct nls_table *nls_codepage, int remap)
1415 {
1416         int rc;
1417         __le16 *utf16_path = NULL;
1418         int utf16_path_len = 0;
1419         struct cifs_tcon *tcon;
1420         struct fsctl_get_dfs_referral_req *dfs_req = NULL;
1421         struct get_dfs_referral_rsp *dfs_rsp = NULL;
1422         u32 dfs_req_size = 0, dfs_rsp_size = 0;
1423
1424         cifs_dbg(FYI, "smb2_get_dfs_refer path <%s>\n", search_name);
1425
1426         /*
1427          * Try to use the IPC tcon, otherwise just use any
1428          */
1429         tcon = ses->tcon_ipc;
1430         if (tcon == NULL) {
1431                 spin_lock(&cifs_tcp_ses_lock);
1432                 tcon = list_first_entry_or_null(&ses->tcon_list,
1433                                                 struct cifs_tcon,
1434                                                 tcon_list);
1435                 if (tcon)
1436                         tcon->tc_count++;
1437                 spin_unlock(&cifs_tcp_ses_lock);
1438         }
1439
1440         if (tcon == NULL) {
1441                 cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n",
1442                          ses);
1443                 rc = -ENOTCONN;
1444                 goto out;
1445         }
1446
1447         utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX,
1448                                            &utf16_path_len,
1449                                            nls_codepage, remap);
1450         if (!utf16_path) {
1451                 rc = -ENOMEM;
1452                 goto out;
1453         }
1454
1455         dfs_req_size = sizeof(*dfs_req) + utf16_path_len;
1456         dfs_req = kzalloc(dfs_req_size, GFP_KERNEL);
1457         if (!dfs_req) {
1458                 rc = -ENOMEM;
1459                 goto out;
1460         }
1461
1462         /* Highest DFS referral version understood */
1463         dfs_req->MaxReferralLevel = DFS_VERSION;
1464
1465         /* Path to resolve in an UTF-16 null-terminated string */
1466         memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len);
1467
1468         do {
1469                 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
1470                                 FSCTL_DFS_GET_REFERRALS,
1471                                 true /* is_fsctl */,
1472                                 (char *)dfs_req, dfs_req_size,
1473                                 (char **)&dfs_rsp, &dfs_rsp_size);
1474         } while (rc == -EAGAIN);
1475
1476         if (rc) {
1477                 if ((rc != -ENOENT) && (rc != -EOPNOTSUPP))
1478                         cifs_dbg(VFS, "ioctl error in smb2_get_dfs_refer rc=%d\n", rc);
1479                 goto out;
1480         }
1481
1482         rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size,
1483                                  num_of_nodes, target_nodes,
1484                                  nls_codepage, remap, search_name,
1485                                  true /* is_unicode */);
1486         if (rc) {
1487                 cifs_dbg(VFS, "parse error in smb2_get_dfs_refer rc=%d\n", rc);
1488                 goto out;
1489         }
1490
1491  out:
1492         if (tcon && !tcon->ipc) {
1493                 /* ipc tcons are not refcounted */
1494                 spin_lock(&cifs_tcp_ses_lock);
1495                 tcon->tc_count--;
1496                 spin_unlock(&cifs_tcp_ses_lock);
1497         }
1498         kfree(utf16_path);
1499         kfree(dfs_req);
1500         kfree(dfs_rsp);
1501         return rc;
1502 }
1503 #define SMB2_SYMLINK_STRUCT_SIZE \
1504         (sizeof(struct smb2_err_rsp) - 1 + sizeof(struct smb2_symlink_err_rsp))
1505
1506 static int
1507 smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
1508                    const char *full_path, char **target_path,
1509                    struct cifs_sb_info *cifs_sb)
1510 {
1511         int rc;
1512         __le16 *utf16_path;
1513         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1514         struct cifs_open_parms oparms;
1515         struct cifs_fid fid;
1516         struct kvec err_iov = {NULL, 0};
1517         struct smb2_err_rsp *err_buf;
1518         struct smb2_symlink_err_rsp *symlink;
1519         unsigned int sub_len;
1520         unsigned int sub_offset;
1521         unsigned int print_len;
1522         unsigned int print_offset;
1523         struct cifs_ses *ses = tcon->ses;
1524         struct TCP_Server_Info *server = ses->server;
1525
1526         cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
1527
1528         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
1529         if (!utf16_path)
1530                 return -ENOMEM;
1531
1532         oparms.tcon = tcon;
1533         oparms.desired_access = FILE_READ_ATTRIBUTES;
1534         oparms.disposition = FILE_OPEN;
1535         oparms.create_options = 0;
1536         oparms.fid = &fid;
1537         oparms.reconnect = false;
1538
1539         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, &err_iov);
1540
1541         if (!rc || !err_iov.iov_base) {
1542                 kfree(utf16_path);
1543                 return -ENOENT;
1544         }
1545
1546         err_buf = err_iov.iov_base;
1547         if (le32_to_cpu(err_buf->ByteCount) < sizeof(struct smb2_symlink_err_rsp) ||
1548             err_iov.iov_len + server->vals->header_preamble_size < SMB2_SYMLINK_STRUCT_SIZE) {
1549                 kfree(utf16_path);
1550                 return -ENOENT;
1551         }
1552
1553         /* open must fail on symlink - reset rc */
1554         rc = 0;
1555         symlink = (struct smb2_symlink_err_rsp *)err_buf->ErrorData;
1556         sub_len = le16_to_cpu(symlink->SubstituteNameLength);
1557         sub_offset = le16_to_cpu(symlink->SubstituteNameOffset);
1558         print_len = le16_to_cpu(symlink->PrintNameLength);
1559         print_offset = le16_to_cpu(symlink->PrintNameOffset);
1560
1561         if (err_iov.iov_len + server->vals->header_preamble_size <
1562                         SMB2_SYMLINK_STRUCT_SIZE + sub_offset + sub_len) {
1563                 kfree(utf16_path);
1564                 return -ENOENT;
1565         }
1566
1567         if (err_iov.iov_len + server->vals->header_preamble_size <
1568                         SMB2_SYMLINK_STRUCT_SIZE + print_offset + print_len) {
1569                 kfree(utf16_path);
1570                 return -ENOENT;
1571         }
1572
1573         *target_path = cifs_strndup_from_utf16(
1574                                 (char *)symlink->PathBuffer + sub_offset,
1575                                 sub_len, true, cifs_sb->local_nls);
1576         if (!(*target_path)) {
1577                 kfree(utf16_path);
1578                 return -ENOMEM;
1579         }
1580         convert_delimiter(*target_path, '/');
1581         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
1582         kfree(utf16_path);
1583         return rc;
1584 }
1585
1586 #ifdef CONFIG_CIFS_ACL
1587 static struct cifs_ntsd *
1588 get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb,
1589                 const struct cifs_fid *cifsfid, u32 *pacllen)
1590 {
1591         struct cifs_ntsd *pntsd = NULL;
1592         unsigned int xid;
1593         int rc = -EOPNOTSUPP;
1594         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
1595
1596         if (IS_ERR(tlink))
1597                 return ERR_CAST(tlink);
1598
1599         xid = get_xid();
1600         cifs_dbg(FYI, "trying to get acl\n");
1601
1602         rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid,
1603                             cifsfid->volatile_fid, (void **)&pntsd, pacllen);
1604         free_xid(xid);
1605
1606         cifs_put_tlink(tlink);
1607
1608         cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
1609         if (rc)
1610                 return ERR_PTR(rc);
1611         return pntsd;
1612
1613 }
1614
1615 static struct cifs_ntsd *
1616 get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb,
1617                 const char *path, u32 *pacllen)
1618 {
1619         struct cifs_ntsd *pntsd = NULL;
1620         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1621         unsigned int xid;
1622         int rc;
1623         struct cifs_tcon *tcon;
1624         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
1625         struct cifs_fid fid;
1626         struct cifs_open_parms oparms;
1627         __le16 *utf16_path;
1628
1629         cifs_dbg(FYI, "get smb3 acl for path %s\n", path);
1630         if (IS_ERR(tlink))
1631                 return ERR_CAST(tlink);
1632
1633         tcon = tlink_tcon(tlink);
1634         xid = get_xid();
1635
1636         if (backup_cred(cifs_sb))
1637                 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
1638         else
1639                 oparms.create_options = 0;
1640
1641         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1642         if (!utf16_path) {
1643                 rc = -ENOMEM;
1644                 free_xid(xid);
1645                 return ERR_PTR(rc);
1646         }
1647
1648         oparms.tcon = tcon;
1649         oparms.desired_access = READ_CONTROL;
1650         oparms.disposition = FILE_OPEN;
1651         oparms.fid = &fid;
1652         oparms.reconnect = false;
1653
1654         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
1655         kfree(utf16_path);
1656         if (!rc) {
1657                 rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
1658                             fid.volatile_fid, (void **)&pntsd, pacllen);
1659                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
1660         }
1661
1662         cifs_put_tlink(tlink);
1663         free_xid(xid);
1664
1665         cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
1666         if (rc)
1667                 return ERR_PTR(rc);
1668         return pntsd;
1669 }
1670
1671 #ifdef CONFIG_CIFS_ACL
1672 static int
1673 set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen,
1674                 struct inode *inode, const char *path, int aclflag)
1675 {
1676         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1677         unsigned int xid;
1678         int rc, access_flags = 0;
1679         struct cifs_tcon *tcon;
1680         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1681         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
1682         struct cifs_fid fid;
1683         struct cifs_open_parms oparms;
1684         __le16 *utf16_path;
1685
1686         cifs_dbg(FYI, "set smb3 acl for path %s\n", path);
1687         if (IS_ERR(tlink))
1688                 return PTR_ERR(tlink);
1689
1690         tcon = tlink_tcon(tlink);
1691         xid = get_xid();
1692
1693         if (backup_cred(cifs_sb))
1694                 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
1695         else
1696                 oparms.create_options = 0;
1697
1698         if (aclflag == CIFS_ACL_OWNER || aclflag == CIFS_ACL_GROUP)
1699                 access_flags = WRITE_OWNER;
1700         else
1701                 access_flags = WRITE_DAC;
1702
1703         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1704         if (!utf16_path) {
1705                 rc = -ENOMEM;
1706                 free_xid(xid);
1707                 return rc;
1708         }
1709
1710         oparms.tcon = tcon;
1711         oparms.desired_access = access_flags;
1712         oparms.disposition = FILE_OPEN;
1713         oparms.path = path;
1714         oparms.fid = &fid;
1715         oparms.reconnect = false;
1716
1717         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
1718         kfree(utf16_path);
1719         if (!rc) {
1720                 rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
1721                             fid.volatile_fid, pnntsd, acllen, aclflag);
1722                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
1723         }
1724
1725         cifs_put_tlink(tlink);
1726         free_xid(xid);
1727         return rc;
1728 }
1729 #endif /* CIFS_ACL */
1730
1731 /* Retrieve an ACL from the server */
1732 static struct cifs_ntsd *
1733 get_smb2_acl(struct cifs_sb_info *cifs_sb,
1734                                       struct inode *inode, const char *path,
1735                                       u32 *pacllen)
1736 {
1737         struct cifs_ntsd *pntsd = NULL;
1738         struct cifsFileInfo *open_file = NULL;
1739
1740         if (inode)
1741                 open_file = find_readable_file(CIFS_I(inode), true);
1742         if (!open_file)
1743                 return get_smb2_acl_by_path(cifs_sb, path, pacllen);
1744
1745         pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen);
1746         cifsFileInfo_put(open_file);
1747         return pntsd;
1748 }
1749 #endif
1750
1751 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
1752                             loff_t offset, loff_t len, bool keep_size)
1753 {
1754         struct inode *inode;
1755         struct cifsInodeInfo *cifsi;
1756         struct cifsFileInfo *cfile = file->private_data;
1757         struct file_zero_data_information fsctl_buf;
1758         long rc;
1759         unsigned int xid;
1760
1761         xid = get_xid();
1762
1763         inode = d_inode(cfile->dentry);
1764         cifsi = CIFS_I(inode);
1765
1766         /* if file not oplocked can't be sure whether asking to extend size */
1767         if (!CIFS_CACHE_READ(cifsi))
1768                 if (keep_size == false) {
1769                         rc = -EOPNOTSUPP;
1770                         free_xid(xid);
1771                         return rc;
1772                 }
1773
1774         /*
1775          * Must check if file sparse since fallocate -z (zero range) assumes
1776          * non-sparse allocation
1777          */
1778         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) {
1779                 rc = -EOPNOTSUPP;
1780                 free_xid(xid);
1781                 return rc;
1782         }
1783
1784         /*
1785          * need to make sure we are not asked to extend the file since the SMB3
1786          * fsctl does not change the file size. In the future we could change
1787          * this to zero the first part of the range then set the file size
1788          * which for a non sparse file would zero the newly extended range
1789          */
1790         if (keep_size == false)
1791                 if (i_size_read(inode) < offset + len) {
1792                         rc = -EOPNOTSUPP;
1793                         free_xid(xid);
1794                         return rc;
1795                 }
1796
1797         cifs_dbg(FYI, "offset %lld len %lld", offset, len);
1798
1799         fsctl_buf.FileOffset = cpu_to_le64(offset);
1800         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
1801
1802         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1803                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
1804                         true /* is_fctl */, (char *)&fsctl_buf,
1805                         sizeof(struct file_zero_data_information), NULL, NULL);
1806         free_xid(xid);
1807         return rc;
1808 }
1809
1810 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
1811                             loff_t offset, loff_t len)
1812 {
1813         struct inode *inode;
1814         struct cifsInodeInfo *cifsi;
1815         struct cifsFileInfo *cfile = file->private_data;
1816         struct file_zero_data_information fsctl_buf;
1817         long rc;
1818         unsigned int xid;
1819         __u8 set_sparse = 1;
1820
1821         xid = get_xid();
1822
1823         inode = d_inode(cfile->dentry);
1824         cifsi = CIFS_I(inode);
1825
1826         /* Need to make file sparse, if not already, before freeing range. */
1827         /* Consider adding equivalent for compressed since it could also work */
1828         if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse)) {
1829                 rc = -EOPNOTSUPP;
1830                 free_xid(xid);
1831                 return rc;
1832         }
1833
1834         cifs_dbg(FYI, "offset %lld len %lld", offset, len);
1835
1836         fsctl_buf.FileOffset = cpu_to_le64(offset);
1837         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
1838
1839         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1840                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
1841                         true /* is_fctl */, (char *)&fsctl_buf,
1842                         sizeof(struct file_zero_data_information), NULL, NULL);
1843         free_xid(xid);
1844         return rc;
1845 }
1846
1847 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
1848                             loff_t off, loff_t len, bool keep_size)
1849 {
1850         struct inode *inode;
1851         struct cifsInodeInfo *cifsi;
1852         struct cifsFileInfo *cfile = file->private_data;
1853         long rc = -EOPNOTSUPP;
1854         unsigned int xid;
1855
1856         xid = get_xid();
1857
1858         inode = d_inode(cfile->dentry);
1859         cifsi = CIFS_I(inode);
1860
1861         /* if file not oplocked can't be sure whether asking to extend size */
1862         if (!CIFS_CACHE_READ(cifsi))
1863                 if (keep_size == false) {
1864                         free_xid(xid);
1865                         return rc;
1866                 }
1867
1868         /*
1869          * Files are non-sparse by default so falloc may be a no-op
1870          * Must check if file sparse. If not sparse, and not extending
1871          * then no need to do anything since file already allocated
1872          */
1873         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
1874                 if (keep_size == true)
1875                         rc = 0;
1876                 /* check if extending file */
1877                 else if (i_size_read(inode) >= off + len)
1878                         /* not extending file and already not sparse */
1879                         rc = 0;
1880                 /* BB: in future add else clause to extend file */
1881                 else
1882                         rc = -EOPNOTSUPP;
1883                 free_xid(xid);
1884                 return rc;
1885         }
1886
1887         if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
1888                 /*
1889                  * Check if falloc starts within first few pages of file
1890                  * and ends within a few pages of the end of file to
1891                  * ensure that most of file is being forced to be
1892                  * fallocated now. If so then setting whole file sparse
1893                  * ie potentially making a few extra pages at the beginning
1894                  * or end of the file non-sparse via set_sparse is harmless.
1895                  */
1896                 if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) {
1897                         rc = -EOPNOTSUPP;
1898                         free_xid(xid);
1899                         return rc;
1900                 }
1901
1902                 rc = smb2_set_sparse(xid, tcon, cfile, inode, false);
1903         }
1904         /* BB: else ... in future add code to extend file and set sparse */
1905
1906
1907         free_xid(xid);
1908         return rc;
1909 }
1910
1911
1912 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
1913                            loff_t off, loff_t len)
1914 {
1915         /* KEEP_SIZE already checked for by do_fallocate */
1916         if (mode & FALLOC_FL_PUNCH_HOLE)
1917                 return smb3_punch_hole(file, tcon, off, len);
1918         else if (mode & FALLOC_FL_ZERO_RANGE) {
1919                 if (mode & FALLOC_FL_KEEP_SIZE)
1920                         return smb3_zero_range(file, tcon, off, len, true);
1921                 return smb3_zero_range(file, tcon, off, len, false);
1922         } else if (mode == FALLOC_FL_KEEP_SIZE)
1923                 return smb3_simple_falloc(file, tcon, off, len, true);
1924         else if (mode == 0)
1925                 return smb3_simple_falloc(file, tcon, off, len, false);
1926
1927         return -EOPNOTSUPP;
1928 }
1929
1930 static void
1931 smb2_downgrade_oplock(struct TCP_Server_Info *server,
1932                         struct cifsInodeInfo *cinode, bool set_level2)
1933 {
1934         if (set_level2)
1935                 server->ops->set_oplock_level(cinode, SMB2_OPLOCK_LEVEL_II,
1936                                                 0, NULL);
1937         else
1938                 server->ops->set_oplock_level(cinode, 0, 0, NULL);
1939 }
1940
1941 static void
1942 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1943                       unsigned int epoch, bool *purge_cache)
1944 {
1945         oplock &= 0xFF;
1946         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
1947                 return;
1948         if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
1949                 cinode->oplock = CIFS_CACHE_RHW_FLG;
1950                 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
1951                          &cinode->vfs_inode);
1952         } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
1953                 cinode->oplock = CIFS_CACHE_RW_FLG;
1954                 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
1955                          &cinode->vfs_inode);
1956         } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
1957                 cinode->oplock = CIFS_CACHE_READ_FLG;
1958                 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
1959                          &cinode->vfs_inode);
1960         } else
1961                 cinode->oplock = 0;
1962 }
1963
1964 static void
1965 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1966                        unsigned int epoch, bool *purge_cache)
1967 {
1968         char message[5] = {0};
1969
1970         oplock &= 0xFF;
1971         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
1972                 return;
1973
1974         cinode->oplock = 0;
1975         if (oplock & SMB2_LEASE_READ_CACHING_HE) {
1976                 cinode->oplock |= CIFS_CACHE_READ_FLG;
1977                 strcat(message, "R");
1978         }
1979         if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
1980                 cinode->oplock |= CIFS_CACHE_HANDLE_FLG;
1981                 strcat(message, "H");
1982         }
1983         if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
1984                 cinode->oplock |= CIFS_CACHE_WRITE_FLG;
1985                 strcat(message, "W");
1986         }
1987         if (!cinode->oplock)
1988                 strcat(message, "None");
1989         cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
1990                  &cinode->vfs_inode);
1991 }
1992
1993 static void
1994 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1995                       unsigned int epoch, bool *purge_cache)
1996 {
1997         unsigned int old_oplock = cinode->oplock;
1998
1999         smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
2000
2001         if (purge_cache) {
2002                 *purge_cache = false;
2003                 if (old_oplock == CIFS_CACHE_READ_FLG) {
2004                         if (cinode->oplock == CIFS_CACHE_READ_FLG &&
2005                             (epoch - cinode->epoch > 0))
2006                                 *purge_cache = true;
2007                         else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
2008                                  (epoch - cinode->epoch > 1))
2009                                 *purge_cache = true;
2010                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
2011                                  (epoch - cinode->epoch > 1))
2012                                 *purge_cache = true;
2013                         else if (cinode->oplock == 0 &&
2014                                  (epoch - cinode->epoch > 0))
2015                                 *purge_cache = true;
2016                 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
2017                         if (cinode->oplock == CIFS_CACHE_RH_FLG &&
2018                             (epoch - cinode->epoch > 0))
2019                                 *purge_cache = true;
2020                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
2021                                  (epoch - cinode->epoch > 1))
2022                                 *purge_cache = true;
2023                 }
2024                 cinode->epoch = epoch;
2025         }
2026 }
2027
2028 static bool
2029 smb2_is_read_op(__u32 oplock)
2030 {
2031         return oplock == SMB2_OPLOCK_LEVEL_II;
2032 }
2033
2034 static bool
2035 smb21_is_read_op(__u32 oplock)
2036 {
2037         return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
2038                !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
2039 }
2040
2041 static __le32
2042 map_oplock_to_lease(u8 oplock)
2043 {
2044         if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
2045                 return SMB2_LEASE_WRITE_CACHING | SMB2_LEASE_READ_CACHING;
2046         else if (oplock == SMB2_OPLOCK_LEVEL_II)
2047                 return SMB2_LEASE_READ_CACHING;
2048         else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
2049                 return SMB2_LEASE_HANDLE_CACHING | SMB2_LEASE_READ_CACHING |
2050                        SMB2_LEASE_WRITE_CACHING;
2051         return 0;
2052 }
2053
2054 static char *
2055 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
2056 {
2057         struct create_lease *buf;
2058
2059         buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
2060         if (!buf)
2061                 return NULL;
2062
2063         buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
2064         buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
2065         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
2066
2067         buf->ccontext.DataOffset = cpu_to_le16(offsetof
2068                                         (struct create_lease, lcontext));
2069         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
2070         buf->ccontext.NameOffset = cpu_to_le16(offsetof
2071                                 (struct create_lease, Name));
2072         buf->ccontext.NameLength = cpu_to_le16(4);
2073         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
2074         buf->Name[0] = 'R';
2075         buf->Name[1] = 'q';
2076         buf->Name[2] = 'L';
2077         buf->Name[3] = 's';
2078         return (char *)buf;
2079 }
2080
2081 static char *
2082 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
2083 {
2084         struct create_lease_v2 *buf;
2085
2086         buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
2087         if (!buf)
2088                 return NULL;
2089
2090         buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
2091         buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
2092         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
2093
2094         buf->ccontext.DataOffset = cpu_to_le16(offsetof
2095                                         (struct create_lease_v2, lcontext));
2096         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
2097         buf->ccontext.NameOffset = cpu_to_le16(offsetof
2098                                 (struct create_lease_v2, Name));
2099         buf->ccontext.NameLength = cpu_to_le16(4);
2100         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
2101         buf->Name[0] = 'R';
2102         buf->Name[1] = 'q';
2103         buf->Name[2] = 'L';
2104         buf->Name[3] = 's';
2105         return (char *)buf;
2106 }
2107
2108 static __u8
2109 smb2_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
2110 {
2111         struct create_lease *lc = (struct create_lease *)buf;
2112
2113         *epoch = 0; /* not used */
2114         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
2115                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
2116         return le32_to_cpu(lc->lcontext.LeaseState);
2117 }
2118
2119 static __u8
2120 smb3_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
2121 {
2122         struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
2123
2124         *epoch = le16_to_cpu(lc->lcontext.Epoch);
2125         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
2126                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
2127         if (lease_key)
2128                 memcpy(lease_key, &lc->lcontext.LeaseKeyLow,
2129                        SMB2_LEASE_KEY_SIZE);
2130         return le32_to_cpu(lc->lcontext.LeaseState);
2131 }
2132
2133 static unsigned int
2134 smb2_wp_retry_size(struct inode *inode)
2135 {
2136         return min_t(unsigned int, CIFS_SB(inode->i_sb)->wsize,
2137                      SMB2_MAX_BUFFER_SIZE);
2138 }
2139
2140 static bool
2141 smb2_dir_needs_close(struct cifsFileInfo *cfile)
2142 {
2143         return !cfile->invalidHandle;
2144 }
2145
2146 static void
2147 fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len,
2148                    struct smb_rqst *old_rq)
2149 {
2150         struct smb2_sync_hdr *shdr =
2151                         (struct smb2_sync_hdr *)old_rq->rq_iov[1].iov_base;
2152
2153         memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr));
2154         tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
2155         tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
2156         tr_hdr->Flags = cpu_to_le16(0x01);
2157         get_random_bytes(&tr_hdr->Nonce, SMB3_AES128CMM_NONCE);
2158         memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8);
2159 }
2160
2161 /* We can not use the normal sg_set_buf() as we will sometimes pass a
2162  * stack object as buf.
2163  */
2164 static inline void smb2_sg_set_buf(struct scatterlist *sg, const void *buf,
2165                                    unsigned int buflen)
2166 {
2167         sg_set_page(sg, virt_to_page(buf), buflen, offset_in_page(buf));
2168 }
2169
2170 /* Assumes:
2171  * rqst->rq_iov[0]  is rfc1002 length
2172  * rqst->rq_iov[1]  is tranform header
2173  * rqst->rq_iov[2+] data to be encrypted/decrypted
2174  */
2175 static struct scatterlist *
2176 init_sg(struct smb_rqst *rqst, u8 *sign)
2177 {
2178         unsigned int sg_len = rqst->rq_nvec + rqst->rq_npages;
2179         unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20;
2180         struct scatterlist *sg;
2181         unsigned int i;
2182         unsigned int j;
2183
2184         sg = kmalloc_array(sg_len, sizeof(struct scatterlist), GFP_KERNEL);
2185         if (!sg)
2186                 return NULL;
2187
2188         sg_init_table(sg, sg_len);
2189         smb2_sg_set_buf(&sg[0], rqst->rq_iov[1].iov_base + 20, assoc_data_len);
2190         for (i = 1; i < rqst->rq_nvec - 1; i++)
2191                 smb2_sg_set_buf(&sg[i], rqst->rq_iov[i+1].iov_base,
2192                                                 rqst->rq_iov[i+1].iov_len);
2193         for (j = 0; i < sg_len - 1; i++, j++) {
2194                 unsigned int len = (j < rqst->rq_npages - 1) ? rqst->rq_pagesz
2195                                                         : rqst->rq_tailsz;
2196                 sg_set_page(&sg[i], rqst->rq_pages[j], len, 0);
2197         }
2198         smb2_sg_set_buf(&sg[sg_len - 1], sign, SMB2_SIGNATURE_SIZE);
2199         return sg;
2200 }
2201
2202 static int
2203 smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key)
2204 {
2205         struct cifs_ses *ses;
2206         u8 *ses_enc_key;
2207
2208         spin_lock(&cifs_tcp_ses_lock);
2209         list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
2210                 if (ses->Suid != ses_id)
2211                         continue;
2212                 ses_enc_key = enc ? ses->smb3encryptionkey :
2213                                                         ses->smb3decryptionkey;
2214                 memcpy(key, ses_enc_key, SMB3_SIGN_KEY_SIZE);
2215                 spin_unlock(&cifs_tcp_ses_lock);
2216                 return 0;
2217         }
2218         spin_unlock(&cifs_tcp_ses_lock);
2219
2220         return 1;
2221 }
2222 /*
2223  * Encrypt or decrypt @rqst message. @rqst has the following format:
2224  * iov[0] - rfc1002 length
2225  * iov[1] - transform header (associate data),
2226  * iov[2-N] and pages - data to encrypt.
2227  * On success return encrypted data in iov[2-N] and pages, leave iov[0-1]
2228  * untouched.
2229  */
2230 static int
2231 crypt_message(struct TCP_Server_Info *server, struct smb_rqst *rqst, int enc)
2232 {
2233         struct smb2_transform_hdr *tr_hdr =
2234                         (struct smb2_transform_hdr *)rqst->rq_iov[0].iov_base;
2235         unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20 - server->vals->header_preamble_size;
2236         int rc = 0;
2237         struct scatterlist *sg;
2238         u8 sign[SMB2_SIGNATURE_SIZE] = {};
2239         u8 key[SMB3_SIGN_KEY_SIZE];
2240         struct aead_request *req;
2241         char *iv;
2242         unsigned int iv_len;
2243         DECLARE_CRYPTO_WAIT(wait);
2244         struct crypto_aead *tfm;
2245         unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
2246
2247         rc = smb2_get_enc_key(server, tr_hdr->SessionId, enc, key);
2248         if (rc) {
2249                 cifs_dbg(VFS, "%s: Could not get %scryption key\n", __func__,
2250                          enc ? "en" : "de");
2251                 return 0;
2252         }
2253
2254         rc = smb3_crypto_aead_allocate(server);
2255         if (rc) {
2256                 cifs_dbg(VFS, "%s: crypto alloc failed\n", __func__);
2257                 return rc;
2258         }
2259
2260         tfm = enc ? server->secmech.ccmaesencrypt :
2261                                                 server->secmech.ccmaesdecrypt;
2262         rc = crypto_aead_setkey(tfm, key, SMB3_SIGN_KEY_SIZE);
2263         if (rc) {
2264                 cifs_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc);
2265                 return rc;
2266         }
2267
2268         rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE);
2269         if (rc) {
2270                 cifs_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc);
2271                 return rc;
2272         }
2273
2274         req = aead_request_alloc(tfm, GFP_KERNEL);
2275         if (!req) {
2276                 cifs_dbg(VFS, "%s: Failed to alloc aead request", __func__);
2277                 return -ENOMEM;
2278         }
2279
2280         if (!enc) {
2281                 memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE);
2282                 crypt_len += SMB2_SIGNATURE_SIZE;
2283         }
2284
2285         sg = init_sg(rqst, sign);
2286         if (!sg) {
2287                 cifs_dbg(VFS, "%s: Failed to init sg", __func__);
2288                 rc = -ENOMEM;
2289                 goto free_req;
2290         }
2291
2292         iv_len = crypto_aead_ivsize(tfm);
2293         iv = kzalloc(iv_len, GFP_KERNEL);
2294         if (!iv) {
2295                 cifs_dbg(VFS, "%s: Failed to alloc IV", __func__);
2296                 rc = -ENOMEM;
2297                 goto free_sg;
2298         }
2299         iv[0] = 3;
2300         memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES128CMM_NONCE);
2301
2302         aead_request_set_crypt(req, sg, sg, crypt_len, iv);
2303         aead_request_set_ad(req, assoc_data_len);
2304
2305         aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
2306                                   crypto_req_done, &wait);
2307
2308         rc = crypto_wait_req(enc ? crypto_aead_encrypt(req)
2309                                 : crypto_aead_decrypt(req), &wait);
2310
2311         if (!rc && enc)
2312                 memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE);
2313
2314         kfree(iv);
2315 free_sg:
2316         kfree(sg);
2317 free_req:
2318         kfree(req);
2319         return rc;
2320 }
2321
2322 /*
2323  * This is called from smb_send_rqst. At this point we have the rfc1002
2324  * header as the first element in the vector.
2325  */
2326 static int
2327 smb3_init_transform_rq(struct TCP_Server_Info *server, struct smb_rqst *new_rq,
2328                        struct smb_rqst *old_rq)
2329 {
2330         struct kvec *iov;
2331         struct page **pages;
2332         struct smb2_transform_hdr *tr_hdr;
2333         unsigned int npages = old_rq->rq_npages;
2334         unsigned int orig_len = get_rfc1002_length(old_rq->rq_iov[0].iov_base);
2335         int i;
2336         int rc = -ENOMEM;
2337
2338         pages = kmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
2339         if (!pages)
2340                 return rc;
2341
2342         new_rq->rq_pages = pages;
2343         new_rq->rq_npages = old_rq->rq_npages;
2344         new_rq->rq_pagesz = old_rq->rq_pagesz;
2345         new_rq->rq_tailsz = old_rq->rq_tailsz;
2346
2347         for (i = 0; i < npages; i++) {
2348                 pages[i] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
2349                 if (!pages[i])
2350                         goto err_free_pages;
2351         }
2352
2353         /* Make space for one extra iov to hold the transform header */
2354         iov = kmalloc_array(old_rq->rq_nvec + 1, sizeof(struct kvec),
2355                             GFP_KERNEL);
2356         if (!iov)
2357                 goto err_free_pages;
2358
2359         /* copy all iovs from the old except the 1st one (rfc1002 length) */
2360         memcpy(&iov[2], &old_rq->rq_iov[1],
2361                                 sizeof(struct kvec) * (old_rq->rq_nvec - 1));
2362         /* copy the rfc1002 iov */
2363         iov[0].iov_base = old_rq->rq_iov[0].iov_base;
2364         iov[0].iov_len  = old_rq->rq_iov[0].iov_len;
2365
2366         new_rq->rq_iov = iov;
2367         new_rq->rq_nvec = old_rq->rq_nvec + 1;
2368
2369         tr_hdr = kmalloc(sizeof(struct smb2_transform_hdr), GFP_KERNEL);
2370         if (!tr_hdr)
2371                 goto err_free_iov;
2372
2373         /* fill the 2nd iov with a transform header */
2374         fill_transform_hdr(tr_hdr, orig_len, old_rq);
2375         new_rq->rq_iov[1].iov_base = tr_hdr;
2376         new_rq->rq_iov[1].iov_len = sizeof(struct smb2_transform_hdr);
2377
2378         /* Update rfc1002 header */
2379         inc_rfc1001_len(new_rq->rq_iov[0].iov_base,
2380                         sizeof(struct smb2_transform_hdr));
2381
2382         /* copy pages form the old */
2383         for (i = 0; i < npages; i++) {
2384                 char *dst = kmap(new_rq->rq_pages[i]);
2385                 char *src = kmap(old_rq->rq_pages[i]);
2386                 unsigned int len = (i < npages - 1) ? new_rq->rq_pagesz :
2387                                                         new_rq->rq_tailsz;
2388                 memcpy(dst, src, len);
2389                 kunmap(new_rq->rq_pages[i]);
2390                 kunmap(old_rq->rq_pages[i]);
2391         }
2392
2393         rc = crypt_message(server, new_rq, 1);
2394         cifs_dbg(FYI, "encrypt message returned %d", rc);
2395         if (rc)
2396                 goto err_free_tr_hdr;
2397
2398         return rc;
2399
2400 err_free_tr_hdr:
2401         kfree(tr_hdr);
2402 err_free_iov:
2403         kfree(iov);
2404 err_free_pages:
2405         for (i = i - 1; i >= 0; i--)
2406                 put_page(pages[i]);
2407         kfree(pages);
2408         return rc;
2409 }
2410
2411 static void
2412 smb3_free_transform_rq(struct smb_rqst *rqst)
2413 {
2414         int i = rqst->rq_npages - 1;
2415
2416         for (; i >= 0; i--)
2417                 put_page(rqst->rq_pages[i]);
2418         kfree(rqst->rq_pages);
2419         /* free transform header */
2420         kfree(rqst->rq_iov[1].iov_base);
2421         kfree(rqst->rq_iov);
2422 }
2423
2424 static int
2425 smb3_is_transform_hdr(void *buf)
2426 {
2427         struct smb2_transform_hdr *trhdr = buf;
2428
2429         return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
2430 }
2431
2432 static int
2433 decrypt_raw_data(struct TCP_Server_Info *server, char *buf,
2434                  unsigned int buf_data_size, struct page **pages,
2435                  unsigned int npages, unsigned int page_data_size)
2436 {
2437         struct kvec iov[3];
2438         struct smb_rqst rqst = {NULL};
2439         int rc;
2440
2441         iov[0].iov_base = NULL;
2442         iov[0].iov_len = 0;
2443         iov[1].iov_base = buf;
2444         iov[1].iov_len = sizeof(struct smb2_transform_hdr);
2445         iov[2].iov_base = buf + sizeof(struct smb2_transform_hdr);
2446         iov[2].iov_len = buf_data_size;
2447
2448         rqst.rq_iov = iov;
2449         rqst.rq_nvec = 3;
2450         rqst.rq_pages = pages;
2451         rqst.rq_npages = npages;
2452         rqst.rq_pagesz = PAGE_SIZE;
2453         rqst.rq_tailsz = (page_data_size % PAGE_SIZE) ? : PAGE_SIZE;
2454
2455         rc = crypt_message(server, &rqst, 0);
2456         cifs_dbg(FYI, "decrypt message returned %d\n", rc);
2457
2458         if (rc)
2459                 return rc;
2460
2461         memmove(buf + server->vals->header_preamble_size, iov[2].iov_base, buf_data_size);
2462
2463         server->total_read = buf_data_size + page_data_size;
2464
2465         return rc;
2466 }
2467
2468 static int
2469 read_data_into_pages(struct TCP_Server_Info *server, struct page **pages,
2470                      unsigned int npages, unsigned int len)
2471 {
2472         int i;
2473         int length;
2474
2475         for (i = 0; i < npages; i++) {
2476                 struct page *page = pages[i];
2477                 size_t n;
2478
2479                 n = len;
2480                 if (len >= PAGE_SIZE) {
2481                         /* enough data to fill the page */
2482                         n = PAGE_SIZE;
2483                         len -= n;
2484                 } else {
2485                         zero_user(page, len, PAGE_SIZE - len);
2486                         len = 0;
2487                 }
2488                 length = cifs_read_page_from_socket(server, page, n);
2489                 if (length < 0)
2490                         return length;
2491                 server->total_read += length;
2492         }
2493
2494         return 0;
2495 }
2496
2497 static int
2498 init_read_bvec(struct page **pages, unsigned int npages, unsigned int data_size,
2499                unsigned int cur_off, struct bio_vec **page_vec)
2500 {
2501         struct bio_vec *bvec;
2502         int i;
2503
2504         bvec = kcalloc(npages, sizeof(struct bio_vec), GFP_KERNEL);
2505         if (!bvec)
2506                 return -ENOMEM;
2507
2508         for (i = 0; i < npages; i++) {
2509                 bvec[i].bv_page = pages[i];
2510                 bvec[i].bv_offset = (i == 0) ? cur_off : 0;
2511                 bvec[i].bv_len = min_t(unsigned int, PAGE_SIZE, data_size);
2512                 data_size -= bvec[i].bv_len;
2513         }
2514
2515         if (data_size != 0) {
2516                 cifs_dbg(VFS, "%s: something went wrong\n", __func__);
2517                 kfree(bvec);
2518                 return -EIO;
2519         }
2520
2521         *page_vec = bvec;
2522         return 0;
2523 }
2524
2525 static int
2526 handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid,
2527                  char *buf, unsigned int buf_len, struct page **pages,
2528                  unsigned int npages, unsigned int page_data_size)
2529 {
2530         unsigned int data_offset;
2531         unsigned int data_len;
2532         unsigned int cur_off;
2533         unsigned int cur_page_idx;
2534         unsigned int pad_len;
2535         struct cifs_readdata *rdata = mid->callback_data;
2536         struct smb2_sync_hdr *shdr = get_sync_hdr(buf);
2537         struct bio_vec *bvec = NULL;
2538         struct iov_iter iter;
2539         struct kvec iov;
2540         int length;
2541         bool use_rdma_mr = false;
2542
2543         if (shdr->Command != SMB2_READ) {
2544                 cifs_dbg(VFS, "only big read responses are supported\n");
2545                 return -ENOTSUPP;
2546         }
2547
2548         if (server->ops->is_session_expired &&
2549             server->ops->is_session_expired(buf)) {
2550                 cifs_reconnect(server);
2551                 wake_up(&server->response_q);
2552                 return -1;
2553         }
2554
2555         if (server->ops->is_status_pending &&
2556                         server->ops->is_status_pending(buf, server, 0))
2557                 return -1;
2558
2559         rdata->result = server->ops->map_error(buf, false);
2560         if (rdata->result != 0) {
2561                 cifs_dbg(FYI, "%s: server returned error %d\n",
2562                          __func__, rdata->result);
2563                 dequeue_mid(mid, rdata->result);
2564                 return 0;
2565         }
2566
2567         data_offset = server->ops->read_data_offset(buf) + server->vals->header_preamble_size;
2568 #ifdef CONFIG_CIFS_SMB_DIRECT
2569         use_rdma_mr = rdata->mr;
2570 #endif
2571         data_len = server->ops->read_data_length(buf, use_rdma_mr);
2572
2573         if (data_offset < server->vals->read_rsp_size) {
2574                 /*
2575                  * win2k8 sometimes sends an offset of 0 when the read
2576                  * is beyond the EOF. Treat it as if the data starts just after
2577                  * the header.
2578                  */
2579                 cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n",
2580                          __func__, data_offset);
2581                 data_offset = server->vals->read_rsp_size;
2582         } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) {
2583                 /* data_offset is beyond the end of smallbuf */
2584                 cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n",
2585                          __func__, data_offset);
2586                 rdata->result = -EIO;
2587                 dequeue_mid(mid, rdata->result);
2588                 return 0;
2589         }
2590
2591         pad_len = data_offset - server->vals->read_rsp_size;
2592
2593         if (buf_len <= data_offset) {
2594                 /* read response payload is in pages */
2595                 cur_page_idx = pad_len / PAGE_SIZE;
2596                 cur_off = pad_len % PAGE_SIZE;
2597
2598                 if (cur_page_idx != 0) {
2599                         /* data offset is beyond the 1st page of response */
2600                         cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n",
2601                                  __func__, data_offset);
2602                         rdata->result = -EIO;
2603                         dequeue_mid(mid, rdata->result);
2604                         return 0;
2605                 }
2606
2607                 if (data_len > page_data_size - pad_len) {
2608                         /* data_len is corrupt -- discard frame */
2609                         rdata->result = -EIO;
2610                         dequeue_mid(mid, rdata->result);
2611                         return 0;
2612                 }
2613
2614                 rdata->result = init_read_bvec(pages, npages, page_data_size,
2615                                                cur_off, &bvec);
2616                 if (rdata->result != 0) {
2617                         dequeue_mid(mid, rdata->result);
2618                         return 0;
2619                 }
2620
2621                 iov_iter_bvec(&iter, WRITE | ITER_BVEC, bvec, npages, data_len);
2622         } else if (buf_len >= data_offset + data_len) {
2623                 /* read response payload is in buf */
2624                 WARN_ONCE(npages > 0, "read data can be either in buf or in pages");
2625                 iov.iov_base = buf + data_offset;
2626                 iov.iov_len = data_len;
2627                 iov_iter_kvec(&iter, WRITE | ITER_KVEC, &iov, 1, data_len);
2628         } else {
2629                 /* read response payload cannot be in both buf and pages */
2630                 WARN_ONCE(1, "buf can not contain only a part of read data");
2631                 rdata->result = -EIO;
2632                 dequeue_mid(mid, rdata->result);
2633                 return 0;
2634         }
2635
2636         /* set up first iov for signature check */
2637         rdata->iov[0].iov_base = buf;
2638         rdata->iov[0].iov_len = 4;
2639         rdata->iov[1].iov_base = buf + 4;
2640         rdata->iov[1].iov_len = server->vals->read_rsp_size - 4;
2641         cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n",
2642                  rdata->iov[0].iov_base, server->vals->read_rsp_size);
2643
2644         length = rdata->copy_into_pages(server, rdata, &iter);
2645
2646         kfree(bvec);
2647
2648         if (length < 0)
2649                 return length;
2650
2651         dequeue_mid(mid, false);
2652         return length;
2653 }
2654
2655 static int
2656 receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid)
2657 {
2658         char *buf = server->smallbuf;
2659         struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
2660         unsigned int npages;
2661         struct page **pages;
2662         unsigned int len;
2663         unsigned int buflen = server->pdu_size + server->vals->header_preamble_size;
2664         int rc;
2665         int i = 0;
2666
2667         len = min_t(unsigned int, buflen, server->vals->read_rsp_size -
2668                 server->vals->header_preamble_size +
2669                 sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1;
2670
2671         rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len);
2672         if (rc < 0)
2673                 return rc;
2674         server->total_read += rc;
2675
2676         len = le32_to_cpu(tr_hdr->OriginalMessageSize) +
2677                 server->vals->header_preamble_size -
2678                 server->vals->read_rsp_size;
2679         npages = DIV_ROUND_UP(len, PAGE_SIZE);
2680
2681         pages = kmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
2682         if (!pages) {
2683                 rc = -ENOMEM;
2684                 goto discard_data;
2685         }
2686
2687         for (; i < npages; i++) {
2688                 pages[i] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
2689                 if (!pages[i]) {
2690                         rc = -ENOMEM;
2691                         goto discard_data;
2692                 }
2693         }
2694
2695         /* read read data into pages */
2696         rc = read_data_into_pages(server, pages, npages, len);
2697         if (rc)
2698                 goto free_pages;
2699
2700         rc = cifs_discard_remaining_data(server);
2701         if (rc)
2702                 goto free_pages;
2703
2704         rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size -
2705                               server->vals->header_preamble_size,
2706                               pages, npages, len);
2707         if (rc)
2708                 goto free_pages;
2709
2710         *mid = smb2_find_mid(server, buf);
2711         if (*mid == NULL)
2712                 cifs_dbg(FYI, "mid not found\n");
2713         else {
2714                 cifs_dbg(FYI, "mid found\n");
2715                 (*mid)->decrypted = true;
2716                 rc = handle_read_data(server, *mid, buf,
2717                                       server->vals->read_rsp_size,
2718                                       pages, npages, len);
2719         }
2720
2721 free_pages:
2722         for (i = i - 1; i >= 0; i--)
2723                 put_page(pages[i]);
2724         kfree(pages);
2725         return rc;
2726 discard_data:
2727         cifs_discard_remaining_data(server);
2728         goto free_pages;
2729 }
2730
2731 static int
2732 receive_encrypted_standard(struct TCP_Server_Info *server,
2733                            struct mid_q_entry **mid)
2734 {
2735         int length;
2736         char *buf = server->smallbuf;
2737         unsigned int pdu_length = server->pdu_size;
2738         unsigned int buf_size;
2739         struct mid_q_entry *mid_entry;
2740
2741         /* switch to large buffer if too big for a small one */
2742         if (pdu_length + server->vals->header_preamble_size > MAX_CIFS_SMALL_BUFFER_SIZE) {
2743                 server->large_buf = true;
2744                 memcpy(server->bigbuf, buf, server->total_read);
2745                 buf = server->bigbuf;
2746         }
2747
2748         /* now read the rest */
2749         length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
2750                                 pdu_length - HEADER_SIZE(server) + 1 +
2751                                 server->vals->header_preamble_size);
2752         if (length < 0)
2753                 return length;
2754         server->total_read += length;
2755
2756         buf_size = pdu_length + server->vals->header_preamble_size - sizeof(struct smb2_transform_hdr);
2757         length = decrypt_raw_data(server, buf, buf_size, NULL, 0, 0);
2758         if (length)
2759                 return length;
2760
2761         mid_entry = smb2_find_mid(server, buf);
2762         if (mid_entry == NULL)
2763                 cifs_dbg(FYI, "mid not found\n");
2764         else {
2765                 cifs_dbg(FYI, "mid found\n");
2766                 mid_entry->decrypted = true;
2767         }
2768
2769         *mid = mid_entry;
2770
2771         if (mid_entry && mid_entry->handle)
2772                 return mid_entry->handle(server, mid_entry);
2773
2774         return cifs_handle_standard(server, mid_entry);
2775 }
2776
2777 static int
2778 smb3_receive_transform(struct TCP_Server_Info *server, struct mid_q_entry **mid)
2779 {
2780         char *buf = server->smallbuf;
2781         unsigned int pdu_length = server->pdu_size;
2782         struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
2783         unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
2784
2785         if (pdu_length + server->vals->header_preamble_size < sizeof(struct smb2_transform_hdr) +
2786                                                 sizeof(struct smb2_sync_hdr)) {
2787                 cifs_dbg(VFS, "Transform message is too small (%u)\n",
2788                          pdu_length);
2789                 cifs_reconnect(server);
2790                 wake_up(&server->response_q);
2791                 return -ECONNABORTED;
2792         }
2793
2794         if (pdu_length + server->vals->header_preamble_size < orig_len + sizeof(struct smb2_transform_hdr)) {
2795                 cifs_dbg(VFS, "Transform message is broken\n");
2796                 cifs_reconnect(server);
2797                 wake_up(&server->response_q);
2798                 return -ECONNABORTED;
2799         }
2800
2801         if (pdu_length + server->vals->header_preamble_size > CIFSMaxBufSize + MAX_HEADER_SIZE(server))
2802                 return receive_encrypted_read(server, mid);
2803
2804         return receive_encrypted_standard(server, mid);
2805 }
2806
2807 int
2808 smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid)
2809 {
2810         char *buf = server->large_buf ? server->bigbuf : server->smallbuf;
2811
2812         return handle_read_data(server, mid, buf, server->pdu_size +
2813                                 server->vals->header_preamble_size,
2814                                 NULL, 0, 0);
2815 }
2816
2817 struct smb_version_operations smb20_operations = {
2818         .compare_fids = smb2_compare_fids,
2819         .setup_request = smb2_setup_request,
2820         .setup_async_request = smb2_setup_async_request,
2821         .check_receive = smb2_check_receive,
2822         .add_credits = smb2_add_credits,
2823         .set_credits = smb2_set_credits,
2824         .get_credits_field = smb2_get_credits_field,
2825         .get_credits = smb2_get_credits,
2826         .wait_mtu_credits = cifs_wait_mtu_credits,
2827         .get_next_mid = smb2_get_next_mid,
2828         .read_data_offset = smb2_read_data_offset,
2829         .read_data_length = smb2_read_data_length,
2830         .map_error = map_smb2_to_linux_error,
2831         .find_mid = smb2_find_mid,
2832         .check_message = smb2_check_message,
2833         .dump_detail = smb2_dump_detail,
2834         .clear_stats = smb2_clear_stats,
2835         .print_stats = smb2_print_stats,
2836         .is_oplock_break = smb2_is_valid_oplock_break,
2837         .handle_cancelled_mid = smb2_handle_cancelled_mid,
2838         .downgrade_oplock = smb2_downgrade_oplock,
2839         .need_neg = smb2_need_neg,
2840         .negotiate = smb2_negotiate,
2841         .negotiate_wsize = smb2_negotiate_wsize,
2842         .negotiate_rsize = smb2_negotiate_rsize,
2843         .sess_setup = SMB2_sess_setup,
2844         .logoff = SMB2_logoff,
2845         .tree_connect = SMB2_tcon,
2846         .tree_disconnect = SMB2_tdis,
2847         .qfs_tcon = smb2_qfs_tcon,
2848         .is_path_accessible = smb2_is_path_accessible,
2849         .can_echo = smb2_can_echo,
2850         .echo = SMB2_echo,
2851         .query_path_info = smb2_query_path_info,
2852         .get_srv_inum = smb2_get_srv_inum,
2853         .query_file_info = smb2_query_file_info,
2854         .set_path_size = smb2_set_path_size,
2855         .set_file_size = smb2_set_file_size,
2856         .set_file_info = smb2_set_file_info,
2857         .set_compression = smb2_set_compression,
2858         .mkdir = smb2_mkdir,
2859         .mkdir_setinfo = smb2_mkdir_setinfo,
2860         .rmdir = smb2_rmdir,
2861         .unlink = smb2_unlink,
2862         .rename = smb2_rename_path,
2863         .create_hardlink = smb2_create_hardlink,
2864         .query_symlink = smb2_query_symlink,
2865         .query_mf_symlink = smb3_query_mf_symlink,
2866         .create_mf_symlink = smb3_create_mf_symlink,
2867         .open = smb2_open_file,
2868         .set_fid = smb2_set_fid,
2869         .close = smb2_close_file,
2870         .flush = smb2_flush_file,
2871         .async_readv = smb2_async_readv,
2872         .async_writev = smb2_async_writev,
2873         .sync_read = smb2_sync_read,
2874         .sync_write = smb2_sync_write,
2875         .query_dir_first = smb2_query_dir_first,
2876         .query_dir_next = smb2_query_dir_next,
2877         .close_dir = smb2_close_dir,
2878         .calc_smb_size = smb2_calc_size,
2879         .is_status_pending = smb2_is_status_pending,
2880         .is_session_expired = smb2_is_session_expired,
2881         .oplock_response = smb2_oplock_response,
2882         .queryfs = smb2_queryfs,
2883         .mand_lock = smb2_mand_lock,
2884         .mand_unlock_range = smb2_unlock_range,
2885         .push_mand_locks = smb2_push_mandatory_locks,
2886         .get_lease_key = smb2_get_lease_key,
2887         .set_lease_key = smb2_set_lease_key,
2888         .new_lease_key = smb2_new_lease_key,
2889         .calc_signature = smb2_calc_signature,
2890         .is_read_op = smb2_is_read_op,
2891         .set_oplock_level = smb2_set_oplock_level,
2892         .create_lease_buf = smb2_create_lease_buf,
2893         .parse_lease_buf = smb2_parse_lease_buf,
2894         .copychunk_range = smb2_copychunk_range,
2895         .wp_retry_size = smb2_wp_retry_size,
2896         .dir_needs_close = smb2_dir_needs_close,
2897         .get_dfs_refer = smb2_get_dfs_refer,
2898         .select_sectype = smb2_select_sectype,
2899 #ifdef CONFIG_CIFS_XATTR
2900         .query_all_EAs = smb2_query_eas,
2901         .set_EA = smb2_set_ea,
2902 #endif /* CIFS_XATTR */
2903 #ifdef CONFIG_CIFS_ACL
2904         .get_acl = get_smb2_acl,
2905         .get_acl_by_fid = get_smb2_acl_by_fid,
2906         .set_acl = set_smb2_acl,
2907 #endif /* CIFS_ACL */
2908 };
2909
2910 struct smb_version_operations smb21_operations = {
2911         .compare_fids = smb2_compare_fids,
2912         .setup_request = smb2_setup_request,
2913         .setup_async_request = smb2_setup_async_request,
2914         .check_receive = smb2_check_receive,
2915         .add_credits = smb2_add_credits,
2916         .set_credits = smb2_set_credits,
2917         .get_credits_field = smb2_get_credits_field,
2918         .get_credits = smb2_get_credits,
2919         .wait_mtu_credits = smb2_wait_mtu_credits,
2920         .get_next_mid = smb2_get_next_mid,
2921         .read_data_offset = smb2_read_data_offset,
2922         .read_data_length = smb2_read_data_length,
2923         .map_error = map_smb2_to_linux_error,
2924         .find_mid = smb2_find_mid,
2925         .check_message = smb2_check_message,
2926         .dump_detail = smb2_dump_detail,
2927         .clear_stats = smb2_clear_stats,
2928         .print_stats = smb2_print_stats,
2929         .is_oplock_break = smb2_is_valid_oplock_break,
2930         .handle_cancelled_mid = smb2_handle_cancelled_mid,
2931         .downgrade_oplock = smb2_downgrade_oplock,
2932         .need_neg = smb2_need_neg,
2933         .negotiate = smb2_negotiate,
2934         .negotiate_wsize = smb2_negotiate_wsize,
2935         .negotiate_rsize = smb2_negotiate_rsize,
2936         .sess_setup = SMB2_sess_setup,
2937         .logoff = SMB2_logoff,
2938         .tree_connect = SMB2_tcon,
2939         .tree_disconnect = SMB2_tdis,
2940         .qfs_tcon = smb2_qfs_tcon,
2941         .is_path_accessible = smb2_is_path_accessible,
2942         .can_echo = smb2_can_echo,
2943         .echo = SMB2_echo,
2944         .query_path_info = smb2_query_path_info,
2945         .get_srv_inum = smb2_get_srv_inum,
2946         .query_file_info = smb2_query_file_info,
2947         .set_path_size = smb2_set_path_size,
2948         .set_file_size = smb2_set_file_size,
2949         .set_file_info = smb2_set_file_info,
2950         .set_compression = smb2_set_compression,
2951         .mkdir = smb2_mkdir,
2952         .mkdir_setinfo = smb2_mkdir_setinfo,
2953         .rmdir = smb2_rmdir,
2954         .unlink = smb2_unlink,
2955         .rename = smb2_rename_path,
2956         .create_hardlink = smb2_create_hardlink,
2957         .query_symlink = smb2_query_symlink,
2958         .query_mf_symlink = smb3_query_mf_symlink,
2959         .create_mf_symlink = smb3_create_mf_symlink,
2960         .open = smb2_open_file,
2961         .set_fid = smb2_set_fid,
2962         .close = smb2_close_file,
2963         .flush = smb2_flush_file,
2964         .async_readv = smb2_async_readv,
2965         .async_writev = smb2_async_writev,
2966         .sync_read = smb2_sync_read,
2967         .sync_write = smb2_sync_write,
2968         .query_dir_first = smb2_query_dir_first,
2969         .query_dir_next = smb2_query_dir_next,
2970         .close_dir = smb2_close_dir,
2971         .calc_smb_size = smb2_calc_size,
2972         .is_status_pending = smb2_is_status_pending,
2973         .is_session_expired = smb2_is_session_expired,
2974         .oplock_response = smb2_oplock_response,
2975         .queryfs = smb2_queryfs,
2976         .mand_lock = smb2_mand_lock,
2977         .mand_unlock_range = smb2_unlock_range,
2978         .push_mand_locks = smb2_push_mandatory_locks,
2979         .get_lease_key = smb2_get_lease_key,
2980         .set_lease_key = smb2_set_lease_key,
2981         .new_lease_key = smb2_new_lease_key,
2982         .calc_signature = smb2_calc_signature,
2983         .is_read_op = smb21_is_read_op,
2984         .set_oplock_level = smb21_set_oplock_level,
2985         .create_lease_buf = smb2_create_lease_buf,
2986         .parse_lease_buf = smb2_parse_lease_buf,
2987         .copychunk_range = smb2_copychunk_range,
2988         .wp_retry_size = smb2_wp_retry_size,
2989         .dir_needs_close = smb2_dir_needs_close,
2990         .enum_snapshots = smb3_enum_snapshots,
2991         .get_dfs_refer = smb2_get_dfs_refer,
2992         .select_sectype = smb2_select_sectype,
2993 #ifdef CONFIG_CIFS_XATTR
2994         .query_all_EAs = smb2_query_eas,
2995         .set_EA = smb2_set_ea,
2996 #endif /* CIFS_XATTR */
2997 #ifdef CONFIG_CIFS_ACL
2998         .get_acl = get_smb2_acl,
2999         .get_acl_by_fid = get_smb2_acl_by_fid,
3000         .set_acl = set_smb2_acl,
3001 #endif /* CIFS_ACL */
3002 };
3003
3004 struct smb_version_operations smb30_operations = {
3005         .compare_fids = smb2_compare_fids,
3006         .setup_request = smb2_setup_request,
3007         .setup_async_request = smb2_setup_async_request,
3008         .check_receive = smb2_check_receive,
3009         .add_credits = smb2_add_credits,
3010         .set_credits = smb2_set_credits,
3011         .get_credits_field = smb2_get_credits_field,
3012         .get_credits = smb2_get_credits,
3013         .wait_mtu_credits = smb2_wait_mtu_credits,
3014         .get_next_mid = smb2_get_next_mid,
3015         .read_data_offset = smb2_read_data_offset,
3016         .read_data_length = smb2_read_data_length,
3017         .map_error = map_smb2_to_linux_error,
3018         .find_mid = smb2_find_mid,
3019         .check_message = smb2_check_message,
3020         .dump_detail = smb2_dump_detail,
3021         .clear_stats = smb2_clear_stats,
3022         .print_stats = smb2_print_stats,
3023         .dump_share_caps = smb2_dump_share_caps,
3024         .is_oplock_break = smb2_is_valid_oplock_break,
3025         .handle_cancelled_mid = smb2_handle_cancelled_mid,
3026         .downgrade_oplock = smb2_downgrade_oplock,
3027         .need_neg = smb2_need_neg,
3028         .negotiate = smb2_negotiate,
3029         .negotiate_wsize = smb2_negotiate_wsize,
3030         .negotiate_rsize = smb2_negotiate_rsize,
3031         .sess_setup = SMB2_sess_setup,
3032         .logoff = SMB2_logoff,
3033         .tree_connect = SMB2_tcon,
3034         .tree_disconnect = SMB2_tdis,
3035         .qfs_tcon = smb3_qfs_tcon,
3036         .is_path_accessible = smb2_is_path_accessible,
3037         .can_echo = smb2_can_echo,
3038         .echo = SMB2_echo,
3039         .query_path_info = smb2_query_path_info,
3040         .get_srv_inum = smb2_get_srv_inum,
3041         .query_file_info = smb2_query_file_info,
3042         .set_path_size = smb2_set_path_size,
3043         .set_file_size = smb2_set_file_size,
3044         .set_file_info = smb2_set_file_info,
3045         .set_compression = smb2_set_compression,
3046         .mkdir = smb2_mkdir,
3047         .mkdir_setinfo = smb2_mkdir_setinfo,
3048         .rmdir = smb2_rmdir,
3049         .unlink = smb2_unlink,
3050         .rename = smb2_rename_path,
3051         .create_hardlink = smb2_create_hardlink,
3052         .query_symlink = smb2_query_symlink,
3053         .query_mf_symlink = smb3_query_mf_symlink,
3054         .create_mf_symlink = smb3_create_mf_symlink,
3055         .open = smb2_open_file,
3056         .set_fid = smb2_set_fid,
3057         .close = smb2_close_file,
3058         .flush = smb2_flush_file,
3059         .async_readv = smb2_async_readv,
3060         .async_writev = smb2_async_writev,
3061         .sync_read = smb2_sync_read,
3062         .sync_write = smb2_sync_write,
3063         .query_dir_first = smb2_query_dir_first,
3064         .query_dir_next = smb2_query_dir_next,
3065         .close_dir = smb2_close_dir,
3066         .calc_smb_size = smb2_calc_size,
3067         .is_status_pending = smb2_is_status_pending,
3068         .is_session_expired = smb2_is_session_expired,
3069         .oplock_response = smb2_oplock_response,
3070         .queryfs = smb2_queryfs,
3071         .mand_lock = smb2_mand_lock,
3072         .mand_unlock_range = smb2_unlock_range,
3073         .push_mand_locks = smb2_push_mandatory_locks,
3074         .get_lease_key = smb2_get_lease_key,
3075         .set_lease_key = smb2_set_lease_key,
3076         .new_lease_key = smb2_new_lease_key,
3077         .generate_signingkey = generate_smb30signingkey,
3078         .calc_signature = smb3_calc_signature,
3079         .set_integrity  = smb3_set_integrity,
3080         .is_read_op = smb21_is_read_op,
3081         .set_oplock_level = smb3_set_oplock_level,
3082         .create_lease_buf = smb3_create_lease_buf,
3083         .parse_lease_buf = smb3_parse_lease_buf,
3084         .copychunk_range = smb2_copychunk_range,
3085         .duplicate_extents = smb2_duplicate_extents,
3086         .validate_negotiate = smb3_validate_negotiate,
3087         .wp_retry_size = smb2_wp_retry_size,
3088         .dir_needs_close = smb2_dir_needs_close,
3089         .fallocate = smb3_fallocate,
3090         .enum_snapshots = smb3_enum_snapshots,
3091         .init_transform_rq = smb3_init_transform_rq,
3092         .free_transform_rq = smb3_free_transform_rq,
3093         .is_transform_hdr = smb3_is_transform_hdr,
3094         .receive_transform = smb3_receive_transform,
3095         .get_dfs_refer = smb2_get_dfs_refer,
3096         .select_sectype = smb2_select_sectype,
3097 #ifdef CONFIG_CIFS_XATTR
3098         .query_all_EAs = smb2_query_eas,
3099         .set_EA = smb2_set_ea,
3100 #endif /* CIFS_XATTR */
3101 #ifdef CONFIG_CIFS_ACL
3102         .get_acl = get_smb2_acl,
3103         .get_acl_by_fid = get_smb2_acl_by_fid,
3104         .set_acl = set_smb2_acl,
3105 #endif /* CIFS_ACL */
3106 };
3107
3108 #ifdef CONFIG_CIFS_SMB311
3109 struct smb_version_operations smb311_operations = {
3110         .compare_fids = smb2_compare_fids,
3111         .setup_request = smb2_setup_request,
3112         .setup_async_request = smb2_setup_async_request,
3113         .check_receive = smb2_check_receive,
3114         .add_credits = smb2_add_credits,
3115         .set_credits = smb2_set_credits,
3116         .get_credits_field = smb2_get_credits_field,
3117         .get_credits = smb2_get_credits,
3118         .wait_mtu_credits = smb2_wait_mtu_credits,
3119         .get_next_mid = smb2_get_next_mid,
3120         .read_data_offset = smb2_read_data_offset,
3121         .read_data_length = smb2_read_data_length,
3122         .map_error = map_smb2_to_linux_error,
3123         .find_mid = smb2_find_mid,
3124         .check_message = smb2_check_message,
3125         .dump_detail = smb2_dump_detail,
3126         .clear_stats = smb2_clear_stats,
3127         .print_stats = smb2_print_stats,
3128         .dump_share_caps = smb2_dump_share_caps,
3129         .is_oplock_break = smb2_is_valid_oplock_break,
3130         .handle_cancelled_mid = smb2_handle_cancelled_mid,
3131         .downgrade_oplock = smb2_downgrade_oplock,
3132         .need_neg = smb2_need_neg,
3133         .negotiate = smb2_negotiate,
3134         .negotiate_wsize = smb2_negotiate_wsize,
3135         .negotiate_rsize = smb2_negotiate_rsize,
3136         .sess_setup = SMB2_sess_setup,
3137         .logoff = SMB2_logoff,
3138         .tree_connect = SMB2_tcon,
3139         .tree_disconnect = SMB2_tdis,
3140         .qfs_tcon = smb3_qfs_tcon,
3141         .is_path_accessible = smb2_is_path_accessible,
3142         .can_echo = smb2_can_echo,
3143         .echo = SMB2_echo,
3144         .query_path_info = smb2_query_path_info,
3145         .get_srv_inum = smb2_get_srv_inum,
3146         .query_file_info = smb2_query_file_info,
3147         .set_path_size = smb2_set_path_size,
3148         .set_file_size = smb2_set_file_size,
3149         .set_file_info = smb2_set_file_info,
3150         .set_compression = smb2_set_compression,
3151         .mkdir = smb2_mkdir,
3152         .mkdir_setinfo = smb2_mkdir_setinfo,
3153         .rmdir = smb2_rmdir,
3154         .unlink = smb2_unlink,
3155         .rename = smb2_rename_path,
3156         .create_hardlink = smb2_create_hardlink,
3157         .query_symlink = smb2_query_symlink,
3158         .query_mf_symlink = smb3_query_mf_symlink,
3159         .create_mf_symlink = smb3_create_mf_symlink,
3160         .open = smb2_open_file,
3161         .set_fid = smb2_set_fid,
3162         .close = smb2_close_file,
3163         .flush = smb2_flush_file,
3164         .async_readv = smb2_async_readv,
3165         .async_writev = smb2_async_writev,
3166         .sync_read = smb2_sync_read,
3167         .sync_write = smb2_sync_write,
3168         .query_dir_first = smb2_query_dir_first,
3169         .query_dir_next = smb2_query_dir_next,
3170         .close_dir = smb2_close_dir,
3171         .calc_smb_size = smb2_calc_size,
3172         .is_status_pending = smb2_is_status_pending,
3173         .is_session_expired = smb2_is_session_expired,
3174         .oplock_response = smb2_oplock_response,
3175         .queryfs = smb2_queryfs,
3176         .mand_lock = smb2_mand_lock,
3177         .mand_unlock_range = smb2_unlock_range,
3178         .push_mand_locks = smb2_push_mandatory_locks,
3179         .get_lease_key = smb2_get_lease_key,
3180         .set_lease_key = smb2_set_lease_key,
3181         .new_lease_key = smb2_new_lease_key,
3182         .generate_signingkey = generate_smb311signingkey,
3183         .calc_signature = smb3_calc_signature,
3184         .set_integrity  = smb3_set_integrity,
3185         .is_read_op = smb21_is_read_op,
3186         .set_oplock_level = smb3_set_oplock_level,
3187         .create_lease_buf = smb3_create_lease_buf,
3188         .parse_lease_buf = smb3_parse_lease_buf,
3189         .copychunk_range = smb2_copychunk_range,
3190         .duplicate_extents = smb2_duplicate_extents,
3191 /*      .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
3192         .wp_retry_size = smb2_wp_retry_size,
3193         .dir_needs_close = smb2_dir_needs_close,
3194         .fallocate = smb3_fallocate,
3195         .enum_snapshots = smb3_enum_snapshots,
3196         .init_transform_rq = smb3_init_transform_rq,
3197         .free_transform_rq = smb3_free_transform_rq,
3198         .is_transform_hdr = smb3_is_transform_hdr,
3199         .receive_transform = smb3_receive_transform,
3200         .get_dfs_refer = smb2_get_dfs_refer,
3201         .select_sectype = smb2_select_sectype,
3202 #ifdef CONFIG_CIFS_XATTR
3203         .query_all_EAs = smb2_query_eas,
3204         .set_EA = smb2_set_ea,
3205 #endif /* CIFS_XATTR */
3206 };
3207 #endif /* CIFS_SMB311 */
3208
3209 struct smb_version_values smb20_values = {
3210         .version_string = SMB20_VERSION_STRING,
3211         .protocol_id = SMB20_PROT_ID,
3212         .req_capabilities = 0, /* MBZ */
3213         .large_lock_type = 0,
3214         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3215         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3216         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3217         .header_size = sizeof(struct smb2_sync_hdr),
3218         .header_preamble_size = 0,
3219         .max_header_size = MAX_SMB2_HDR_SIZE,
3220         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3221         .lock_cmd = SMB2_LOCK,
3222         .cap_unix = 0,
3223         .cap_nt_find = SMB2_NT_FIND,
3224         .cap_large_files = SMB2_LARGE_FILES,
3225         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3226         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3227         .create_lease_size = sizeof(struct create_lease),
3228 };
3229
3230 struct smb_version_values smb21_values = {
3231         .version_string = SMB21_VERSION_STRING,
3232         .protocol_id = SMB21_PROT_ID,
3233         .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
3234         .large_lock_type = 0,
3235         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3236         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3237         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3238         .header_size = sizeof(struct smb2_sync_hdr),
3239         .header_preamble_size = 0,
3240         .max_header_size = MAX_SMB2_HDR_SIZE,
3241         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3242         .lock_cmd = SMB2_LOCK,
3243         .cap_unix = 0,
3244         .cap_nt_find = SMB2_NT_FIND,
3245         .cap_large_files = SMB2_LARGE_FILES,
3246         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3247         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3248         .create_lease_size = sizeof(struct create_lease),
3249 };
3250
3251 struct smb_version_values smb3any_values = {
3252         .version_string = SMB3ANY_VERSION_STRING,
3253         .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
3254         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
3255         .large_lock_type = 0,
3256         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3257         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3258         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3259         .header_size = sizeof(struct smb2_sync_hdr),
3260         .header_preamble_size = 0,
3261         .max_header_size = MAX_SMB2_HDR_SIZE,
3262         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3263         .lock_cmd = SMB2_LOCK,
3264         .cap_unix = 0,
3265         .cap_nt_find = SMB2_NT_FIND,
3266         .cap_large_files = SMB2_LARGE_FILES,
3267         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3268         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3269         .create_lease_size = sizeof(struct create_lease_v2),
3270 };
3271
3272 struct smb_version_values smbdefault_values = {
3273         .version_string = SMBDEFAULT_VERSION_STRING,
3274         .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
3275         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
3276         .large_lock_type = 0,
3277         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3278         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3279         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3280         .header_size = sizeof(struct smb2_sync_hdr),
3281         .header_preamble_size = 0,
3282         .max_header_size = MAX_SMB2_HDR_SIZE,
3283         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3284         .lock_cmd = SMB2_LOCK,
3285         .cap_unix = 0,
3286         .cap_nt_find = SMB2_NT_FIND,
3287         .cap_large_files = SMB2_LARGE_FILES,
3288         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3289         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3290         .create_lease_size = sizeof(struct create_lease_v2),
3291 };
3292
3293 struct smb_version_values smb30_values = {
3294         .version_string = SMB30_VERSION_STRING,
3295         .protocol_id = SMB30_PROT_ID,
3296         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
3297         .large_lock_type = 0,
3298         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3299         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3300         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3301         .header_size = sizeof(struct smb2_sync_hdr),
3302         .header_preamble_size = 0,
3303         .max_header_size = MAX_SMB2_HDR_SIZE,
3304         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3305         .lock_cmd = SMB2_LOCK,
3306         .cap_unix = 0,
3307         .cap_nt_find = SMB2_NT_FIND,
3308         .cap_large_files = SMB2_LARGE_FILES,
3309         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3310         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3311         .create_lease_size = sizeof(struct create_lease_v2),
3312 };
3313
3314 struct smb_version_values smb302_values = {
3315         .version_string = SMB302_VERSION_STRING,
3316         .protocol_id = SMB302_PROT_ID,
3317         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
3318         .large_lock_type = 0,
3319         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3320         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3321         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3322         .header_size = sizeof(struct smb2_sync_hdr),
3323         .header_preamble_size = 0,
3324         .max_header_size = MAX_SMB2_HDR_SIZE,
3325         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3326         .lock_cmd = SMB2_LOCK,
3327         .cap_unix = 0,
3328         .cap_nt_find = SMB2_NT_FIND,
3329         .cap_large_files = SMB2_LARGE_FILES,
3330         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3331         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3332         .create_lease_size = sizeof(struct create_lease_v2),
3333 };
3334
3335 #ifdef CONFIG_CIFS_SMB311
3336 struct smb_version_values smb311_values = {
3337         .version_string = SMB311_VERSION_STRING,
3338         .protocol_id = SMB311_PROT_ID,
3339         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
3340         .large_lock_type = 0,
3341         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3342         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3343         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3344         .header_size = sizeof(struct smb2_sync_hdr),
3345         .header_preamble_size = 0,
3346         .max_header_size = MAX_SMB2_HDR_SIZE,
3347         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3348         .lock_cmd = SMB2_LOCK,
3349         .cap_unix = 0,
3350         .cap_nt_find = SMB2_NT_FIND,
3351         .cap_large_files = SMB2_LARGE_FILES,
3352         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3353         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3354         .create_lease_size = sizeof(struct create_lease_v2),
3355 };
3356 #endif /* SMB311 */