fs/cifs/smb2ops.c

   1 /*
   2  *  SMB2 version specific operations
   3  *
   4  *  Copyright (c) 2012, Jeff Layton <jlayton@redhat.com>
   5  *
   6  *  This library is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License v2 as published
   8  *  by the Free Software Foundation.
   9  *
  10  *  This library is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
  13  *  the GNU Lesser General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU Lesser General Public License
  16  *  along with this library; if not, write to the Free Software
  17  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  18  */
  19
  20 #include <linux/pagemap.h>
  21 #include <linux/vfs.h>
  22 #include <linux/falloc.h>
  23 #include <linux/scatterlist.h>
  24 #include <linux/uuid.h>
  25 #include <crypto/aead.h>
  26 #include "cifsglob.h"
  27 #include "smb2pdu.h"
  28 #include "smb2proto.h"
  29 #include "cifsproto.h"
  30 #include "cifs_debug.h"
  31 #include "cifs_unicode.h"
  32 #include "smb2status.h"
  33 #include "smb2glob.h"
  34 #include "cifs_ioctl.h"
  35 #include "smbdirect.h"
  36
  37 static int
  38 change_conf(struct TCP_Server_Info *server)
  39 {
  40         server->credits += server->echo_credits + server->oplock_credits;
  41         server->oplock_credits = server->echo_credits = 0;
  42         switch (server->credits) {
  43         case 0:
  44                 return -1;
  45         case 1:
  46                 server->echoes = false;
  47                 server->oplocks = false;
  48                 cifs_dbg(VFS, "disabling echoes and oplocks\n");
  49                 break;
  50         case 2:
  51                 server->echoes = true;
  52                 server->oplocks = false;
  53                 server->echo_credits = 1;
  54                 cifs_dbg(FYI, "disabling oplocks\n");
  55                 break;
  56         default:
  57                 server->echoes = true;
  58                 if (enable_oplocks) {
  59                         server->oplocks = true;
  60                         server->oplock_credits = 1;
  61                 } else
  62                         server->oplocks = false;
  63
  64                 server->echo_credits = 1;
  65         }
  66         server->credits -= server->echo_credits + server->oplock_credits;
  67         return 0;
  68 }
  69
  70 static void
  71 smb2_add_credits(struct TCP_Server_Info *server, const unsigned int add,
  72                  const int optype)
  73 {
  74         int *val, rc = 0;
  75         spin_lock(&server->req_lock);
  76         val = server->ops->get_credits_field(server, optype);
  77         *val += add;
  78         if (*val > 65000) {
  79                 *val = 65000; /* Don't get near 64K credits, avoid srv bugs */
  80                 printk_once(KERN_WARNING "server overflowed SMB3 credits\n");
  81         }
  82         server->in_flight--;
  83         if (server->in_flight == 0 && (optype & CIFS_OP_MASK) != CIFS_NEG_OP)
  84                 rc = change_conf(server);
  85         /*
  86          * Sometimes server returns 0 credits on oplock break ack - we need to
  87          * rebalance credits in this case.
  88          */
  89         else if (server->in_flight > 0 && server->oplock_credits == 0 &&
  90                  server->oplocks) {
  91                 if (server->credits > 1) {
  92                         server->credits--;
  93                         server->oplock_credits++;
  94                 }
  95         }
  96         spin_unlock(&server->req_lock);
  97         wake_up(&server->request_q);
  98         if (rc)
  99                 cifs_reconnect(server);
 100 }
 101
 102 static void
 103 smb2_set_credits(struct TCP_Server_Info *server, const int val)
 104 {
 105         spin_lock(&server->req_lock);
 106         server->credits = val;
 107         spin_unlock(&server->req_lock);
 108 }
 109
 110 static int *
 111 smb2_get_credits_field(struct TCP_Server_Info *server, const int optype)
 112 {
 113         switch (optype) {
 114         case CIFS_ECHO_OP:
 115                 return &server->echo_credits;
 116         case CIFS_OBREAK_OP:
 117                 return &server->oplock_credits;
 118         default:
 119                 return &server->credits;
 120         }
 121 }
 122
 123 static unsigned int
 124 smb2_get_credits(struct mid_q_entry *mid)
 125 {
 126         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)mid->resp_buf;
 127
 128         return le16_to_cpu(shdr->CreditRequest);
 129 }
 130
 131 static int
 132 smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size,
 133                       unsigned int *num, unsigned int *credits)
 134 {
 135         int rc = 0;
 136         unsigned int scredits;
 137
 138         spin_lock(&server->req_lock);
 139         while (1) {
 140                 if (server->credits <= 0) {
 141                         spin_unlock(&server->req_lock);
 142                         cifs_num_waiters_inc(server);
 143                         rc = wait_event_killable(server->request_q,
 144                                         has_credits(server, &server->credits));
 145                         cifs_num_waiters_dec(server);
 146                         if (rc)
 147                                 return rc;
 148                         spin_lock(&server->req_lock);
 149                 } else {
 150                         if (server->tcpStatus == CifsExiting) {
 151                                 spin_unlock(&server->req_lock);
 152                                 return -ENOENT;
 153                         }
 154
 155                         scredits = server->credits;
 156                         /* can deadlock with reopen */
 157                         if (scredits == 1) {
 158                                 *num = SMB2_MAX_BUFFER_SIZE;
 159                                 *credits = 0;
 160                                 break;
 161                         }
 162
 163                         /* leave one credit for a possible reopen */
 164                         scredits--;
 165                         *num = min_t(unsigned int, size,
 166                                      scredits * SMB2_MAX_BUFFER_SIZE);
 167
 168                         *credits = DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE);
 169                         server->credits -= *credits;
 170                         server->in_flight++;
 171                         break;
 172                 }
 173         }
 174         spin_unlock(&server->req_lock);
 175         return rc;
 176 }
 177
 178 static __u64
 179 smb2_get_next_mid(struct TCP_Server_Info *server)
 180 {
 181         __u64 mid;
 182         /* for SMB2 we need the current value */
 183         spin_lock(&GlobalMid_Lock);
 184         mid = server->CurrentMid++;
 185         spin_unlock(&GlobalMid_Lock);
 186         return mid;
 187 }
 188
 189 static struct mid_q_entry *
 190 smb2_find_mid(struct TCP_Server_Info *server, char *buf)
 191 {
 192         struct mid_q_entry *mid;
 193         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
 194         __u64 wire_mid = le64_to_cpu(shdr->MessageId);
 195
 196         if (shdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {
 197                 cifs_dbg(VFS, "encrypted frame parsing not supported yet");
 198                 return NULL;
 199         }
 200
 201         spin_lock(&GlobalMid_Lock);
 202         list_for_each_entry(mid, &server->pending_mid_q, qhead) {
 203                 if ((mid->mid == wire_mid) &&
 204                     (mid->mid_state == MID_REQUEST_SUBMITTED) &&
 205                     (mid->command == shdr->Command)) {
 206                         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 = (struct smb2_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, 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                                NULL);
 380         else
 381                 rc = open_shroot(xid, tcon, &fid);
 382
 383         if (rc)
 384                 return;
 385
 386 #ifdef CONFIG_CIFS_STATS2
 387         SMB3_request_interfaces(xid, tcon);
 388 #endif /* STATS2 */
 389
 390         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 391                         FS_ATTRIBUTE_INFORMATION);
 392         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 393                         FS_DEVICE_INFORMATION);
 394         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 395                         FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
 396         if (no_cached_open)
 397                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 398         return;
 399 }
 400
 401 static void
 402 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
 403 {
 404         int rc;
 405         __le16 srch_path = 0; /* Null - open root of share */
 406         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 407         struct cifs_open_parms oparms;
 408         struct cifs_fid fid;
 409
 410         oparms.tcon = tcon;
 411         oparms.desired_access = FILE_READ_ATTRIBUTES;
 412         oparms.disposition = FILE_OPEN;
 413         oparms.create_options = 0;
 414         oparms.fid = &fid;
 415         oparms.reconnect = false;
 416
 417         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, NULL);
 418         if (rc)
 419                 return;
 420
 421         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 422                         FS_ATTRIBUTE_INFORMATION);
 423         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 424                         FS_DEVICE_INFORMATION);
 425         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 426         return;
 427 }
 428
 429 static int
 430 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
 431                         struct cifs_sb_info *cifs_sb, const char *full_path)
 432 {
 433         int rc;
 434         __le16 *utf16_path;
 435         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 436         struct cifs_open_parms oparms;
 437         struct cifs_fid fid;
 438
 439         if ((*full_path == 0) && tcon->valid_root_fid)
 440                 return 0;
 441
 442         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
 443         if (!utf16_path)
 444                 return -ENOMEM;
 445
 446         oparms.tcon = tcon;
 447         oparms.desired_access = FILE_READ_ATTRIBUTES;
 448         oparms.disposition = FILE_OPEN;
 449         oparms.create_options = 0;
 450         oparms.fid = &fid;
 451         oparms.reconnect = false;
 452
 453         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
 454         if (rc) {
 455                 kfree(utf16_path);
 456                 return rc;
 457         }
 458
 459         rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 460         kfree(utf16_path);
 461         return rc;
 462 }
 463
 464 static int
 465 smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
 466                   struct cifs_sb_info *cifs_sb, const char *full_path,
 467                   u64 *uniqueid, FILE_ALL_INFO *data)
 468 {
 469         *uniqueid = le64_to_cpu(data->IndexNumber);
 470         return 0;
 471 }
 472
 473 static int
 474 smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
 475                      struct cifs_fid *fid, FILE_ALL_INFO *data)
 476 {
 477         int rc;
 478         struct smb2_file_all_info *smb2_data;
 479
 480         smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
 481                             GFP_KERNEL);
 482         if (smb2_data == NULL)
 483                 return -ENOMEM;
 484
 485         rc = SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid,
 486                              smb2_data);
 487         if (!rc)
 488                 move_smb2_info_to_cifs(data, smb2_data);
 489         kfree(smb2_data);
 490         return rc;
 491 }
 492
 493 #ifdef CONFIG_CIFS_XATTR
 494 static ssize_t
 495 move_smb2_ea_to_cifs(char *dst, size_t dst_size,
 496                      struct smb2_file_full_ea_info *src, size_t src_size,
 497                      const unsigned char *ea_name)
 498 {
 499         int rc = 0;
 500         unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0;
 501         char *name, *value;
 502         size_t name_len, value_len, user_name_len;
 503
 504         while (src_size > 0) {
 505                 name = &src->ea_data[0];
 506                 name_len = (size_t)src->ea_name_length;
 507                 value = &src->ea_data[src->ea_name_length + 1];
 508                 value_len = (size_t)le16_to_cpu(src->ea_value_length);
 509
 510                 if (name_len == 0) {
 511                         break;
 512                 }
 513
 514                 if (src_size < 8 + name_len + 1 + value_len) {
 515                         cifs_dbg(FYI, "EA entry goes beyond length of list\n");
 516                         rc = -EIO;
 517                         goto out;
 518                 }
 519
 520                 if (ea_name) {
 521                         if (ea_name_len == name_len &&
 522                             memcmp(ea_name, name, name_len) == 0) {
 523                                 rc = value_len;
 524                                 if (dst_size == 0)
 525                                         goto out;
 526                                 if (dst_size < value_len) {
 527                                         rc = -ERANGE;
 528                                         goto out;
 529                                 }
 530                                 memcpy(dst, value, value_len);
 531                                 goto out;
 532                         }
 533                 } else {
 534                         /* 'user.' plus a terminating null */
 535                         user_name_len = 5 + 1 + name_len;
 536
 537                         rc += user_name_len;
 538
 539                         if (dst_size >= user_name_len) {
 540                                 dst_size -= user_name_len;
 541                                 memcpy(dst, "user.", 5);
 542                                 dst += 5;
 543                                 memcpy(dst, src->ea_data, name_len);
 544                                 dst += name_len;
 545                                 *dst = 0;
 546                                 ++dst;
 547                         } else if (dst_size == 0) {
 548                                 /* skip copy - calc size only */
 549                         } else {
 550                                 /* stop before overrun buffer */
 551                                 rc = -ERANGE;
 552                                 break;
 553                         }
 554                 }
 555
 556                 if (!src->next_entry_offset)
 557                         break;
 558
 559                 if (src_size < le32_to_cpu(src->next_entry_offset)) {
 560                         /* stop before overrun buffer */
 561                         rc = -ERANGE;
 562                         break;
 563                 }
 564                 src_size -= le32_to_cpu(src->next_entry_offset);
 565                 src = (void *)((char *)src +
 566                                le32_to_cpu(src->next_entry_offset));
 567         }
 568
 569         /* didn't find the named attribute */
 570         if (ea_name)
 571                 rc = -ENODATA;
 572
 573 out:
 574         return (ssize_t)rc;
 575 }
 576
 577 static ssize_t
 578 smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon,
 579                const unsigned char *path, const unsigned char *ea_name,
 580                char *ea_data, size_t buf_size,
 581                struct cifs_sb_info *cifs_sb)
 582 {
 583         int rc;
 584         __le16 *utf16_path;
 585         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 586         struct cifs_open_parms oparms;
 587         struct cifs_fid fid;
 588         struct smb2_file_full_ea_info *smb2_data;
 589         int ea_buf_size = SMB2_MIN_EA_BUF;
 590
 591         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
 592         if (!utf16_path)
 593                 return -ENOMEM;
 594
 595         oparms.tcon = tcon;
 596         oparms.desired_access = FILE_READ_EA;
 597         oparms.disposition = FILE_OPEN;
 598         oparms.create_options = 0;
 599         oparms.fid = &fid;
 600         oparms.reconnect = false;
 601
 602         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
 603         kfree(utf16_path);
 604         if (rc) {
 605                 cifs_dbg(FYI, "open failed rc=%d\n", rc);
 606                 return rc;
 607         }
 608
 609         while (1) {
 610                 smb2_data = kzalloc(ea_buf_size, GFP_KERNEL);
 611                 if (smb2_data == NULL) {
 612                         SMB2_close(xid, tcon, fid.persistent_fid,
 613                                    fid.volatile_fid);
 614                         return -ENOMEM;
 615                 }
 616
 617                 rc = SMB2_query_eas(xid, tcon, fid.persistent_fid,
 618                                     fid.volatile_fid,
 619                                     ea_buf_size, smb2_data);
 620
 621                 if (rc != -E2BIG)
 622                         break;
 623
 624                 kfree(smb2_data);
 625                 ea_buf_size <<= 1;
 626
 627                 if (ea_buf_size > SMB2_MAX_EA_BUF) {
 628                         cifs_dbg(VFS, "EA size is too large\n");
 629                         SMB2_close(xid, tcon, fid.persistent_fid,
 630                                    fid.volatile_fid);
 631                         return -ENOMEM;
 632                 }
 633         }
 634
 635         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 636
 637         /*
 638          * If ea_name is NULL (listxattr) and there are no EAs, return 0 as it's
 639          * not an error. Otherwise, the specified ea_name was not found.
 640          */
 641         if (!rc)
 642                 rc = move_smb2_ea_to_cifs(ea_data, buf_size, smb2_data,
 643                                           SMB2_MAX_EA_BUF, ea_name);
 644         else if (!ea_name && rc == -ENODATA)
 645                 rc = 0;
 646
 647         kfree(smb2_data);
 648         return rc;
 649 }
 650
 651
 652 static int
 653 smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
 654             const char *path, const char *ea_name, const void *ea_value,
 655             const __u16 ea_value_len, const struct nls_table *nls_codepage,
 656             struct cifs_sb_info *cifs_sb)
 657 {
 658         int rc;
 659         __le16 *utf16_path;
 660         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 661         struct cifs_open_parms oparms;
 662         struct cifs_fid fid;
 663         struct smb2_file_full_ea_info *ea;
 664         int ea_name_len = strlen(ea_name);
 665         int len;
 666
 667         if (ea_name_len > 255)
 668                 return -EINVAL;
 669
 670         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
 671         if (!utf16_path)
 672                 return -ENOMEM;
 673
 674         oparms.tcon = tcon;
 675         oparms.desired_access = FILE_WRITE_EA;
 676         oparms.disposition = FILE_OPEN;
 677         oparms.create_options = 0;
 678         oparms.fid = &fid;
 679         oparms.reconnect = false;
 680
 681         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
 682         kfree(utf16_path);
 683         if (rc) {
 684                 cifs_dbg(FYI, "open failed rc=%d\n", rc);
 685                 return rc;
 686         }
 687
 688         len = sizeof(ea) + ea_name_len + ea_value_len + 1;
 689         ea = kzalloc(len, GFP_KERNEL);
 690         if (ea == NULL) {
 691                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 692                 return -ENOMEM;
 693         }
 694
 695         ea->ea_name_length = ea_name_len;
 696         ea->ea_value_length = cpu_to_le16(ea_value_len);
 697         memcpy(ea->ea_data, ea_name, ea_name_len + 1);
 698         memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len);
 699
 700         rc = SMB2_set_ea(xid, tcon, fid.persistent_fid, fid.volatile_fid, ea,
 701                          len);
 702         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 703
 704         return rc;
 705 }
 706 #endif
 707
 708 static bool
 709 smb2_can_echo(struct TCP_Server_Info *server)
 710 {
 711         return server->echoes;
 712 }
 713
 714 static void
 715 smb2_clear_stats(struct cifs_tcon *tcon)
 716 {
 717 #ifdef CONFIG_CIFS_STATS
 718         int i;
 719         for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
 720                 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
 721                 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
 722         }
 723 #endif
 724 }
 725
 726 static void
 727 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
 728 {
 729         seq_puts(m, "\n\tShare Capabilities:");
 730         if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
 731                 seq_puts(m, " DFS,");
 732         if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
 733                 seq_puts(m, " CONTINUOUS AVAILABILITY,");
 734         if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
 735                 seq_puts(m, " SCALEOUT,");
 736         if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
 737                 seq_puts(m, " CLUSTER,");
 738         if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
 739                 seq_puts(m, " ASYMMETRIC,");
 740         if (tcon->capabilities == 0)
 741                 seq_puts(m, " None");
 742         if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
 743                 seq_puts(m, " Aligned,");
 744         if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
 745                 seq_puts(m, " Partition Aligned,");
 746         if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
 747                 seq_puts(m, " SSD,");
 748         if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
 749                 seq_puts(m, " TRIM-support,");
 750
 751         seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
 752         seq_printf(m, "\n\ttid: 0x%x", tcon->tid);
 753         if (tcon->perf_sector_size)
 754                 seq_printf(m, "\tOptimal sector size: 0x%x",
 755                            tcon->perf_sector_size);
 756         seq_printf(m, "\tMaximal Access: 0x%x", tcon->maximal_access);
 757 }
 758
 759 static void
 760 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
 761 {
 762 #ifdef CONFIG_CIFS_STATS
 763         atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
 764         atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
 765         seq_printf(m, "\nNegotiates: %d sent %d failed",
 766                    atomic_read(&sent[SMB2_NEGOTIATE_HE]),
 767                    atomic_read(&failed[SMB2_NEGOTIATE_HE]));
 768         seq_printf(m, "\nSessionSetups: %d sent %d failed",
 769                    atomic_read(&sent[SMB2_SESSION_SETUP_HE]),
 770                    atomic_read(&failed[SMB2_SESSION_SETUP_HE]));
 771         seq_printf(m, "\nLogoffs: %d sent %d failed",
 772                    atomic_read(&sent[SMB2_LOGOFF_HE]),
 773                    atomic_read(&failed[SMB2_LOGOFF_HE]));
 774         seq_printf(m, "\nTreeConnects: %d sent %d failed",
 775                    atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
 776                    atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
 777         seq_printf(m, "\nTreeDisconnects: %d sent %d failed",
 778                    atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
 779                    atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
 780         seq_printf(m, "\nCreates: %d sent %d failed",
 781                    atomic_read(&sent[SMB2_CREATE_HE]),
 782                    atomic_read(&failed[SMB2_CREATE_HE]));
 783         seq_printf(m, "\nCloses: %d sent %d failed",
 784                    atomic_read(&sent[SMB2_CLOSE_HE]),
 785                    atomic_read(&failed[SMB2_CLOSE_HE]));
 786         seq_printf(m, "\nFlushes: %d sent %d failed",
 787                    atomic_read(&sent[SMB2_FLUSH_HE]),
 788                    atomic_read(&failed[SMB2_FLUSH_HE]));
 789         seq_printf(m, "\nReads: %d sent %d failed",
 790                    atomic_read(&sent[SMB2_READ_HE]),
 791                    atomic_read(&failed[SMB2_READ_HE]));
 792         seq_printf(m, "\nWrites: %d sent %d failed",
 793                    atomic_read(&sent[SMB2_WRITE_HE]),
 794                    atomic_read(&failed[SMB2_WRITE_HE]));
 795         seq_printf(m, "\nLocks: %d sent %d failed",
 796                    atomic_read(&sent[SMB2_LOCK_HE]),
 797                    atomic_read(&failed[SMB2_LOCK_HE]));
 798         seq_printf(m, "\nIOCTLs: %d sent %d failed",
 799                    atomic_read(&sent[SMB2_IOCTL_HE]),
 800                    atomic_read(&failed[SMB2_IOCTL_HE]));
 801         seq_printf(m, "\nCancels: %d sent %d failed",
 802                    atomic_read(&sent[SMB2_CANCEL_HE]),
 803                    atomic_read(&failed[SMB2_CANCEL_HE]));
 804         seq_printf(m, "\nEchos: %d sent %d failed",
 805                    atomic_read(&sent[SMB2_ECHO_HE]),
 806                    atomic_read(&failed[SMB2_ECHO_HE]));
 807         seq_printf(m, "\nQueryDirectories: %d sent %d failed",
 808                    atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
 809                    atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
 810         seq_printf(m, "\nChangeNotifies: %d sent %d failed",
 811                    atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
 812                    atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
 813         seq_printf(m, "\nQueryInfos: %d sent %d failed",
 814                    atomic_read(&sent[SMB2_QUERY_INFO_HE]),
 815                    atomic_read(&failed[SMB2_QUERY_INFO_HE]));
 816         seq_printf(m, "\nSetInfos: %d sent %d failed",
 817                    atomic_read(&sent[SMB2_SET_INFO_HE]),
 818                    atomic_read(&failed[SMB2_SET_INFO_HE]));
 819         seq_printf(m, "\nOplockBreaks: %d sent %d failed",
 820                    atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
 821                    atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
 822 #endif
 823 }
 824
 825 static void
 826 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
 827 {
 828         struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
 829         struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
 830
 831         cfile->fid.persistent_fid = fid->persistent_fid;
 832         cfile->fid.volatile_fid = fid->volatile_fid;
 833         server->ops->set_oplock_level(cinode, oplock, fid->epoch,
 834                                       &fid->purge_cache);
 835         cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
 836         memcpy(cfile->fid.create_guid, fid->create_guid, 16);
 837 }
 838
 839 static void
 840 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
 841                 struct cifs_fid *fid)
 842 {
 843         SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 844 }
 845
 846 static int
 847 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
 848                      u64 persistent_fid, u64 volatile_fid,
 849                      struct copychunk_ioctl *pcchunk)
 850 {
 851         int rc;
 852         unsigned int ret_data_len;
 853         struct resume_key_req *res_key;
 854
 855         rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
 856                         FSCTL_SRV_REQUEST_RESUME_KEY, true /* is_fsctl */,
 857                         NULL, 0 /* no input */,
 858                         (char **)&res_key, &ret_data_len);
 859
 860         if (rc) {
 861                 cifs_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
 862                 goto req_res_key_exit;
 863         }
 864         if (ret_data_len < sizeof(struct resume_key_req)) {
 865                 cifs_dbg(VFS, "Invalid refcopy resume key length\n");
 866                 rc = -EINVAL;
 867                 goto req_res_key_exit;
 868         }
 869         memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
 870
 871 req_res_key_exit:
 872         kfree(res_key);
 873         return rc;
 874 }
 875
 876 static ssize_t
 877 smb2_copychunk_range(const unsigned int xid,
 878                         struct cifsFileInfo *srcfile,
 879                         struct cifsFileInfo *trgtfile, u64 src_off,
 880                         u64 len, u64 dest_off)
 881 {
 882         int rc;
 883         unsigned int ret_data_len;
 884         struct copychunk_ioctl *pcchunk;
 885         struct copychunk_ioctl_rsp *retbuf = NULL;
 886         struct cifs_tcon *tcon;
 887         int chunks_copied = 0;
 888         bool chunk_sizes_updated = false;
 889         ssize_t bytes_written, total_bytes_written = 0;
 890
 891         pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
 892
 893         if (pcchunk == NULL)
 894                 return -ENOMEM;
 895
 896         cifs_dbg(FYI, "in smb2_copychunk_range - about to call request res key\n");
 897         /* Request a key from the server to identify the source of the copy */
 898         rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
 899                                 srcfile->fid.persistent_fid,
 900                                 srcfile->fid.volatile_fid, pcchunk);
 901
 902         /* Note: request_res_key sets res_key null only if rc !=0 */
 903         if (rc)
 904                 goto cchunk_out;
 905
 906         /* For now array only one chunk long, will make more flexible later */
 907         pcchunk->ChunkCount = cpu_to_le32(1);
 908         pcchunk->Reserved = 0;
 909         pcchunk->Reserved2 = 0;
 910
 911         tcon = tlink_tcon(trgtfile->tlink);
 912
 913         while (len > 0) {
 914                 pcchunk->SourceOffset = cpu_to_le64(src_off);
 915                 pcchunk->TargetOffset = cpu_to_le64(dest_off);
 916                 pcchunk->Length =
 917                         cpu_to_le32(min_t(u32, len, tcon->max_bytes_chunk));
 918
 919                 /* Request server copy to target from src identified by key */
 920                 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
 921                         trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
 922                         true /* is_fsctl */, (char *)pcchunk,
 923                         sizeof(struct copychunk_ioctl), (char **)&retbuf,
 924                         &ret_data_len);
 925                 if (rc == 0) {
 926                         if (ret_data_len !=
 927                                         sizeof(struct copychunk_ioctl_rsp)) {
 928                                 cifs_dbg(VFS, "invalid cchunk response size\n");
 929                                 rc = -EIO;
 930                                 goto cchunk_out;
 931                         }
 932                         if (retbuf->TotalBytesWritten == 0) {
 933                                 cifs_dbg(FYI, "no bytes copied\n");
 934                                 rc = -EIO;
 935                                 goto cchunk_out;
 936                         }
 937                         /*
 938                          * Check if server claimed to write more than we asked
 939                          */
 940                         if (le32_to_cpu(retbuf->TotalBytesWritten) >
 941                             le32_to_cpu(pcchunk->Length)) {
 942                                 cifs_dbg(VFS, "invalid copy chunk response\n");
 943                                 rc = -EIO;
 944                                 goto cchunk_out;
 945                         }
 946                         if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
 947                                 cifs_dbg(VFS, "invalid num chunks written\n");
 948                                 rc = -EIO;
 949                                 goto cchunk_out;
 950                         }
 951                         chunks_copied++;
 952
 953                         bytes_written = le32_to_cpu(retbuf->TotalBytesWritten);
 954                         src_off += bytes_written;
 955                         dest_off += bytes_written;
 956                         len -= bytes_written;
 957                         total_bytes_written += bytes_written;
 958
 959                         cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n",
 960                                 le32_to_cpu(retbuf->ChunksWritten),
 961                                 le32_to_cpu(retbuf->ChunkBytesWritten),
 962                                 bytes_written);
 963                 } else if (rc == -EINVAL) {
 964                         if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
 965                                 goto cchunk_out;
 966
 967                         cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
 968                                 le32_to_cpu(retbuf->ChunksWritten),
 969                                 le32_to_cpu(retbuf->ChunkBytesWritten),
 970                                 le32_to_cpu(retbuf->TotalBytesWritten));
 971
 972                         /*
 973                          * Check if this is the first request using these sizes,
 974                          * (ie check if copy succeed once with original sizes
 975                          * and check if the server gave us different sizes after
 976                          * we already updated max sizes on previous request).
 977                          * if not then why is the server returning an error now
 978                          */
 979                         if ((chunks_copied != 0) || chunk_sizes_updated)
 980                                 goto cchunk_out;
 981
 982                         /* Check that server is not asking us to grow size */
 983                         if (le32_to_cpu(retbuf->ChunkBytesWritten) <
 984                                         tcon->max_bytes_chunk)
 985                                 tcon->max_bytes_chunk =
 986                                         le32_to_cpu(retbuf->ChunkBytesWritten);
 987                         else
 988                                 goto cchunk_out; /* server gave us bogus size */
 989
 990                         /* No need to change MaxChunks since already set to 1 */
 991                         chunk_sizes_updated = true;
 992                 } else
 993                         goto cchunk_out;
 994         }
 995
 996 cchunk_out:
 997         kfree(pcchunk);
 998         kfree(retbuf);
 999         if (rc)
1000                 return rc;
1001         else
1002                 return total_bytes_written;
1003 }
1004
1005 static int
1006 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
1007                 struct cifs_fid *fid)
1008 {
1009         return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1010 }
1011
1012 static unsigned int
1013 smb2_read_data_offset(char *buf)
1014 {
1015         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1016         return rsp->DataOffset;
1017 }
1018
1019 static unsigned int
1020 smb2_read_data_length(char *buf, bool in_remaining)
1021 {
1022         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1023
1024         if (in_remaining)
1025                 return le32_to_cpu(rsp->DataRemaining);
1026
1027         return le32_to_cpu(rsp->DataLength);
1028 }
1029
1030
1031 static int
1032 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,
1033                struct cifs_io_parms *parms, unsigned int *bytes_read,
1034                char **buf, int *buf_type)
1035 {
1036         parms->persistent_fid = pfid->persistent_fid;
1037         parms->volatile_fid = pfid->volatile_fid;
1038         return SMB2_read(xid, parms, bytes_read, buf, buf_type);
1039 }
1040
1041 static int
1042 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,
1043                 struct cifs_io_parms *parms, unsigned int *written,
1044                 struct kvec *iov, unsigned long nr_segs)
1045 {
1046
1047         parms->persistent_fid = pfid->persistent_fid;
1048         parms->volatile_fid = pfid->volatile_fid;
1049         return SMB2_write(xid, parms, written, iov, nr_segs);
1050 }
1051
1052 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
1053 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
1054                 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
1055 {
1056         struct cifsInodeInfo *cifsi;
1057         int rc;
1058
1059         cifsi = CIFS_I(inode);
1060
1061         /* if file already sparse don't bother setting sparse again */
1062         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
1063                 return true; /* already sparse */
1064
1065         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
1066                 return true; /* already not sparse */
1067
1068         /*
1069          * Can't check for sparse support on share the usual way via the
1070          * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
1071          * since Samba server doesn't set the flag on the share, yet
1072          * supports the set sparse FSCTL and returns sparse correctly
1073          * in the file attributes. If we fail setting sparse though we
1074          * mark that server does not support sparse files for this share
1075          * to avoid repeatedly sending the unsupported fsctl to server
1076          * if the file is repeatedly extended.
1077          */
1078         if (tcon->broken_sparse_sup)
1079                 return false;
1080
1081         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1082                         cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
1083                         true /* is_fctl */,
1084                         &setsparse, 1, NULL, NULL);
1085         if (rc) {
1086                 tcon->broken_sparse_sup = true;
1087                 cifs_dbg(FYI, "set sparse rc = %d\n", rc);
1088                 return false;
1089         }
1090
1091         if (setsparse)
1092                 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
1093         else
1094                 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
1095
1096         return true;
1097 }
1098
1099 static int
1100 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
1101                    struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
1102 {
1103         __le64 eof = cpu_to_le64(size);
1104         struct inode *inode;
1105
1106         /*
1107          * If extending file more than one page make sparse. Many Linux fs
1108          * make files sparse by default when extending via ftruncate
1109          */
1110         inode = d_inode(cfile->dentry);
1111
1112         if (!set_alloc && (size > inode->i_size + 8192)) {
1113                 __u8 set_sparse = 1;
1114
1115                 /* whether set sparse succeeds or not, extend the file */
1116                 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
1117         }
1118
1119         return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
1120                             cfile->fid.volatile_fid, cfile->pid, &eof, false);
1121 }
1122
1123 static int
1124 smb2_duplicate_extents(const unsigned int xid,
1125                         struct cifsFileInfo *srcfile,
1126                         struct cifsFileInfo *trgtfile, u64 src_off,
1127                         u64 len, u64 dest_off)
1128 {
1129         int rc;
1130         unsigned int ret_data_len;
1131         struct duplicate_extents_to_file dup_ext_buf;
1132         struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink);
1133
1134         /* server fileays advertise duplicate extent support with this flag */
1135         if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) &
1136              FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0)
1137                 return -EOPNOTSUPP;
1138
1139         dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid;
1140         dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid;
1141         dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off);
1142         dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off);
1143         dup_ext_buf.ByteCount = cpu_to_le64(len);
1144         cifs_dbg(FYI, "duplicate extents: src off %lld dst off %lld len %lld",
1145                 src_off, dest_off, len);
1146
1147         rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false);
1148         if (rc)
1149                 goto duplicate_extents_out;
1150
1151         rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1152                         trgtfile->fid.volatile_fid,
1153                         FSCTL_DUPLICATE_EXTENTS_TO_FILE,
1154                         true /* is_fsctl */,
1155                         (char *)&dup_ext_buf,
1156                         sizeof(struct duplicate_extents_to_file),
1157                         NULL,
1158                         &ret_data_len);
1159
1160         if (ret_data_len > 0)
1161                 cifs_dbg(FYI, "non-zero response length in duplicate extents");
1162
1163 duplicate_extents_out:
1164         return rc;
1165 }
1166
1167 static int
1168 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
1169                    struct cifsFileInfo *cfile)
1170 {
1171         return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
1172                             cfile->fid.volatile_fid);
1173 }
1174
1175 static int
1176 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
1177                    struct cifsFileInfo *cfile)
1178 {
1179         struct fsctl_set_integrity_information_req integr_info;
1180         unsigned int ret_data_len;
1181
1182         integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED);
1183         integr_info.Flags = 0;
1184         integr_info.Reserved = 0;
1185
1186         return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1187                         cfile->fid.volatile_fid,
1188                         FSCTL_SET_INTEGRITY_INFORMATION,
1189                         true /* is_fsctl */,
1190                         (char *)&integr_info,
1191                         sizeof(struct fsctl_set_integrity_information_req),
1192                         NULL,
1193                         &ret_data_len);
1194
1195 }
1196
1197 static int
1198 smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon,
1199                    struct cifsFileInfo *cfile, void __user *ioc_buf)
1200 {
1201         char *retbuf = NULL;
1202         unsigned int ret_data_len = 0;
1203         int rc;
1204         struct smb_snapshot_array snapshot_in;
1205
1206         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1207                         cfile->fid.volatile_fid,
1208                         FSCTL_SRV_ENUMERATE_SNAPSHOTS,
1209                         true /* is_fsctl */,
1210                         NULL, 0 /* no input data */,
1211                         (char **)&retbuf,
1212                         &ret_data_len);
1213         cifs_dbg(FYI, "enum snaphots ioctl returned %d and ret buflen is %d\n",
1214                         rc, ret_data_len);
1215         if (rc)
1216                 return rc;
1217
1218         if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) {
1219                 /* Fixup buffer */
1220                 if (copy_from_user(&snapshot_in, ioc_buf,
1221                     sizeof(struct smb_snapshot_array))) {
1222                         rc = -EFAULT;
1223                         kfree(retbuf);
1224                         return rc;
1225                 }
1226                 if (snapshot_in.snapshot_array_size < sizeof(struct smb_snapshot_array)) {
1227                         rc = -ERANGE;
1228                         kfree(retbuf);
1229                         return rc;
1230                 }
1231
1232                 if (ret_data_len > snapshot_in.snapshot_array_size)
1233                         ret_data_len = snapshot_in.snapshot_array_size;
1234
1235                 if (copy_to_user(ioc_buf, retbuf, ret_data_len))
1236                         rc = -EFAULT;
1237         }
1238
1239         kfree(retbuf);
1240         return rc;
1241 }
1242
1243 static int
1244 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
1245                      const char *path, struct cifs_sb_info *cifs_sb,
1246                      struct cifs_fid *fid, __u16 search_flags,
1247                      struct cifs_search_info *srch_inf)
1248 {
1249         __le16 *utf16_path;
1250         int rc;
1251         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1252         struct cifs_open_parms oparms;
1253
1254         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1255         if (!utf16_path)
1256                 return -ENOMEM;
1257
1258         oparms.tcon = tcon;
1259         oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
1260         oparms.disposition = FILE_OPEN;
1261         oparms.create_options = 0;
1262         oparms.fid = fid;
1263         oparms.reconnect = false;
1264
1265         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
1266         kfree(utf16_path);
1267         if (rc) {
1268                 cifs_dbg(FYI, "open dir failed rc=%d\n", rc);
1269                 return rc;
1270         }
1271
1272         srch_inf->entries_in_buffer = 0;
1273         srch_inf->index_of_last_entry = 0;
1274
1275         rc = SMB2_query_directory(xid, tcon, fid->persistent_fid,
1276                                   fid->volatile_fid, 0, srch_inf);
1277         if (rc) {
1278                 cifs_dbg(FYI, "query directory failed rc=%d\n", rc);
1279                 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1280         }
1281         return rc;
1282 }
1283
1284 static int
1285 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
1286                     struct cifs_fid *fid, __u16 search_flags,
1287                     struct cifs_search_info *srch_inf)
1288 {
1289         return SMB2_query_directory(xid, tcon, fid->persistent_fid,
1290                                     fid->volatile_fid, 0, srch_inf);
1291 }
1292
1293 static int
1294 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
1295                struct cifs_fid *fid)
1296 {
1297         return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1298 }
1299
1300 /*
1301 * If we negotiate SMB2 protocol and get STATUS_PENDING - update
1302 * the number of credits and return true. Otherwise - return false.
1303 */
1304 static bool
1305 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server, int length)
1306 {
1307         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
1308
1309         if (shdr->Status != STATUS_PENDING)
1310                 return false;
1311
1312         if (!length) {
1313                 spin_lock(&server->req_lock);
1314                 server->credits += le16_to_cpu(shdr->CreditRequest);
1315                 spin_unlock(&server->req_lock);
1316                 wake_up(&server->request_q);
1317         }
1318
1319         return true;
1320 }
1321
1322 static bool
1323 smb2_is_session_expired(char *buf)
1324 {
1325         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
1326
1327         if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED &&
1328             shdr->Status != STATUS_USER_SESSION_DELETED)
1329                 return false;
1330
1331         cifs_dbg(FYI, "Session expired or deleted\n");
1332         return true;
1333 }
1334
1335 static int
1336 smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
1337                      struct cifsInodeInfo *cinode)
1338 {
1339         if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
1340                 return SMB2_lease_break(0, tcon, cinode->lease_key,
1341                                         smb2_get_lease_state(cinode));
1342
1343         return SMB2_oplock_break(0, tcon, fid->persistent_fid,
1344                                  fid->volatile_fid,
1345                                  CIFS_CACHE_READ(cinode) ? 1 : 0);
1346 }
1347
1348 static int
1349 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
1350              struct kstatfs *buf)
1351 {
1352         int rc;
1353         __le16 srch_path = 0; /* Null - open root of share */
1354         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1355         struct cifs_open_parms oparms;
1356         struct cifs_fid fid;
1357
1358         oparms.tcon = tcon;
1359         oparms.desired_access = FILE_READ_ATTRIBUTES;
1360         oparms.disposition = FILE_OPEN;
1361         oparms.create_options = 0;
1362         oparms.fid = &fid;
1363         oparms.reconnect = false;
1364
1365         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, NULL);
1366         if (rc)
1367                 return rc;
1368         buf->f_type = SMB2_MAGIC_NUMBER;
1369         rc = SMB2_QFS_info(xid, tcon, fid.persistent_fid, fid.volatile_fid,
1370                            buf);
1371         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
1372         return rc;
1373 }
1374
1375 static bool
1376 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
1377 {
1378         return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
1379                ob1->fid.volatile_fid == ob2->fid.volatile_fid;
1380 }
1381
1382 static int
1383 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
1384                __u64 length, __u32 type, int lock, int unlock, bool wait)
1385 {
1386         if (unlock && !lock)
1387                 type = SMB2_LOCKFLAG_UNLOCK;
1388         return SMB2_lock(xid, tlink_tcon(cfile->tlink),
1389                          cfile->fid.persistent_fid, cfile->fid.volatile_fid,
1390                          current->tgid, length, offset, type, wait);
1391 }
1392
1393 static void
1394 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
1395 {
1396         memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
1397 }
1398
1399 static void
1400 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
1401 {
1402         memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
1403 }
1404
1405 static void
1406 smb2_new_lease_key(struct cifs_fid *fid)
1407 {
1408         generate_random_uuid(fid->lease_key);
1409 }
1410
1411 static int
1412 smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,
1413                    const char *search_name,
1414                    struct dfs_info3_param **target_nodes,
1415                    unsigned int *num_of_nodes,
1416                    const struct nls_table *nls_codepage, int remap)
1417 {
1418         int rc;
1419         __le16 *utf16_path = NULL;
1420         int utf16_path_len = 0;
1421         struct cifs_tcon *tcon;
1422         struct fsctl_get_dfs_referral_req *dfs_req = NULL;
1423         struct get_dfs_referral_rsp *dfs_rsp = NULL;
1424         u32 dfs_req_size = 0, dfs_rsp_size = 0;
1425
1426         cifs_dbg(FYI, "smb2_get_dfs_refer path <%s>\n", search_name);
1427
1428         /*
1429          * Try to use the IPC tcon, otherwise just use any
1430          */
1431         tcon = ses->tcon_ipc;
1432         if (tcon == NULL) {
1433                 spin_lock(&cifs_tcp_ses_lock);
1434                 tcon = list_first_entry_or_null(&ses->tcon_list,
1435                                                 struct cifs_tcon,
1436                                                 tcon_list);
1437                 if (tcon)
1438                         tcon->tc_count++;
1439                 spin_unlock(&cifs_tcp_ses_lock);
1440         }
1441
1442         if (tcon == NULL) {
1443                 cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n",
1444                          ses);
1445                 rc = -ENOTCONN;
1446                 goto out;
1447         }
1448
1449         utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX,
1450                                            &utf16_path_len,
1451                                            nls_codepage, remap);
1452         if (!utf16_path) {
1453                 rc = -ENOMEM;
1454                 goto out;
1455         }
1456
1457         dfs_req_size = sizeof(*dfs_req) + utf16_path_len;
1458         dfs_req = kzalloc(dfs_req_size, GFP_KERNEL);
1459         if (!dfs_req) {
1460                 rc = -ENOMEM;
1461                 goto out;
1462         }
1463
1464         /* Highest DFS referral version understood */
1465         dfs_req->MaxReferralLevel = DFS_VERSION;
1466
1467         /* Path to resolve in an UTF-16 null-terminated string */
1468         memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len);
1469
1470         do {
1471                 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
1472                                 FSCTL_DFS_GET_REFERRALS,
1473                                 true /* is_fsctl */,
1474                                 (char *)dfs_req, dfs_req_size,
1475                                 (char **)&dfs_rsp, &dfs_rsp_size);
1476         } while (rc == -EAGAIN);
1477
1478         if (rc) {
1479                 if ((rc != -ENOENT) && (rc != -EOPNOTSUPP))
1480                         cifs_dbg(VFS, "ioctl error in smb2_get_dfs_refer rc=%d\n", rc);
1481                 goto out;
1482         }
1483
1484         rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size,
1485                                  num_of_nodes, target_nodes,
1486                                  nls_codepage, remap, search_name,
1487                                  true /* is_unicode */);
1488         if (rc) {
1489                 cifs_dbg(VFS, "parse error in smb2_get_dfs_refer rc=%d\n", rc);
1490                 goto out;
1491         }
1492
1493  out:
1494         if (tcon && !tcon->ipc) {
1495                 /* ipc tcons are not refcounted */
1496                 spin_lock(&cifs_tcp_ses_lock);
1497                 tcon->tc_count--;
1498                 spin_unlock(&cifs_tcp_ses_lock);
1499         }
1500         kfree(utf16_path);
1501         kfree(dfs_req);
1502         kfree(dfs_rsp);
1503         return rc;
1504 }
1505 #define SMB2_SYMLINK_STRUCT_SIZE \
1506         (sizeof(struct smb2_err_rsp) - 1 + sizeof(struct smb2_symlink_err_rsp))
1507
1508 static int
1509 smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
1510                    const char *full_path, char **target_path,
1511                    struct cifs_sb_info *cifs_sb)
1512 {
1513         int rc;
1514         __le16 *utf16_path;
1515         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1516         struct cifs_open_parms oparms;
1517         struct cifs_fid fid;
1518         struct kvec err_iov = {NULL, 0};
1519         struct smb2_err_rsp *err_buf = NULL;
1520         int resp_buftype;
1521         struct smb2_symlink_err_rsp *symlink;
1522         unsigned int sub_len;
1523         unsigned int sub_offset;
1524         unsigned int print_len;
1525         unsigned int print_offset;
1526
1527         cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
1528
1529         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
1530         if (!utf16_path)
1531                 return -ENOMEM;
1532
1533         oparms.tcon = tcon;
1534         oparms.desired_access = FILE_READ_ATTRIBUTES;
1535         oparms.disposition = FILE_OPEN;
1536         oparms.create_options = 0;
1537         oparms.fid = &fid;
1538         oparms.reconnect = false;
1539
1540         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, &err_iov,
1541                        &resp_buftype);
1542         if (!rc || !err_iov.iov_base) {
1543                 rc = -ENOENT;
1544                 goto querty_exit;
1545         }
1546
1547         err_buf = err_iov.iov_base;
1548         if (le32_to_cpu(err_buf->ByteCount) < sizeof(struct smb2_symlink_err_rsp) ||
1549             err_iov.iov_len < SMB2_SYMLINK_STRUCT_SIZE) {
1550                 rc = -ENOENT;
1551                 goto querty_exit;
1552         }
1553
1554         /* open must fail on symlink - reset rc */
1555         rc = 0;
1556         symlink = (struct smb2_symlink_err_rsp *)err_buf->ErrorData;
1557         sub_len = le16_to_cpu(symlink->SubstituteNameLength);
1558         sub_offset = le16_to_cpu(symlink->SubstituteNameOffset);
1559         print_len = le16_to_cpu(symlink->PrintNameLength);
1560         print_offset = le16_to_cpu(symlink->PrintNameOffset);
1561
1562         if (err_iov.iov_len < SMB2_SYMLINK_STRUCT_SIZE + sub_offset + sub_len) {
1563                 rc = -ENOENT;
1564                 goto querty_exit;
1565         }
1566
1567         if (err_iov.iov_len <
1568             SMB2_SYMLINK_STRUCT_SIZE + print_offset + print_len) {
1569                 rc = -ENOENT;
1570                 goto querty_exit;
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                 rc = -ENOMEM;
1578                 goto querty_exit;
1579         }
1580         convert_delimiter(*target_path, '/');
1581         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
1582
1583  querty_exit:
1584         free_rsp_buf(resp_buftype, err_buf);
1585         kfree(utf16_path);
1586         return rc;
1587 }
1588
1589 #ifdef CONFIG_CIFS_ACL
1590 static struct cifs_ntsd *
1591 get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb,
1592                 const struct cifs_fid *cifsfid, u32 *pacllen)
1593 {
1594         struct cifs_ntsd *pntsd = NULL;
1595         unsigned int xid;
1596         int rc = -EOPNOTSUPP;
1597         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
1598
1599         if (IS_ERR(tlink))
1600                 return ERR_CAST(tlink);
1601
1602         xid = get_xid();
1603         cifs_dbg(FYI, "trying to get acl\n");
1604
1605         rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid,
1606                             cifsfid->volatile_fid, (void **)&pntsd, pacllen);
1607         free_xid(xid);
1608
1609         cifs_put_tlink(tlink);
1610
1611         cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
1612         if (rc)
1613                 return ERR_PTR(rc);
1614         return pntsd;
1615
1616 }
1617
1618 static struct cifs_ntsd *
1619 get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb,
1620                 const char *path, u32 *pacllen)
1621 {
1622         struct cifs_ntsd *pntsd = NULL;
1623         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1624         unsigned int xid;
1625         int rc;
1626         struct cifs_tcon *tcon;
1627         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
1628         struct cifs_fid fid;
1629         struct cifs_open_parms oparms;
1630         __le16 *utf16_path;
1631
1632         cifs_dbg(FYI, "get smb3 acl for path %s\n", path);
1633         if (IS_ERR(tlink))
1634                 return ERR_CAST(tlink);
1635
1636         tcon = tlink_tcon(tlink);
1637         xid = get_xid();
1638
1639         if (backup_cred(cifs_sb))
1640                 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
1641         else
1642                 oparms.create_options = 0;
1643
1644         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1645         if (!utf16_path) {
1646                 rc = -ENOMEM;
1647                 free_xid(xid);
1648                 return ERR_PTR(rc);
1649         }
1650
1651         oparms.tcon = tcon;
1652         oparms.desired_access = READ_CONTROL;
1653         oparms.disposition = FILE_OPEN;
1654         oparms.fid = &fid;
1655         oparms.reconnect = false;
1656
1657         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
1658         kfree(utf16_path);
1659         if (!rc) {
1660                 rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
1661                             fid.volatile_fid, (void **)&pntsd, pacllen);
1662                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
1663         }
1664
1665         cifs_put_tlink(tlink);
1666         free_xid(xid);
1667
1668         cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
1669         if (rc)
1670                 return ERR_PTR(rc);
1671         return pntsd;
1672 }
1673
1674 #ifdef CONFIG_CIFS_ACL
1675 static int
1676 set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen,
1677                 struct inode *inode, const char *path, int aclflag)
1678 {
1679         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1680         unsigned int xid;
1681         int rc, access_flags = 0;
1682         struct cifs_tcon *tcon;
1683         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1684         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
1685         struct cifs_fid fid;
1686         struct cifs_open_parms oparms;
1687         __le16 *utf16_path;
1688
1689         cifs_dbg(FYI, "set smb3 acl for path %s\n", path);
1690         if (IS_ERR(tlink))
1691                 return PTR_ERR(tlink);
1692
1693         tcon = tlink_tcon(tlink);
1694         xid = get_xid();
1695
1696         if (backup_cred(cifs_sb))
1697                 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
1698         else
1699                 oparms.create_options = 0;
1700
1701         if (aclflag == CIFS_ACL_OWNER || aclflag == CIFS_ACL_GROUP)
1702                 access_flags = WRITE_OWNER;
1703         else
1704                 access_flags = WRITE_DAC;
1705
1706         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1707         if (!utf16_path) {
1708                 rc = -ENOMEM;
1709                 free_xid(xid);
1710                 return rc;
1711         }
1712
1713         oparms.tcon = tcon;
1714         oparms.desired_access = access_flags;
1715         oparms.disposition = FILE_OPEN;
1716         oparms.path = path;
1717         oparms.fid = &fid;
1718         oparms.reconnect = false;
1719
1720         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
1721         kfree(utf16_path);
1722         if (!rc) {
1723                 rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
1724                             fid.volatile_fid, pnntsd, acllen, aclflag);
1725                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
1726         }
1727
1728         cifs_put_tlink(tlink);
1729         free_xid(xid);
1730         return rc;
1731 }
1732 #endif /* CIFS_ACL */
1733
1734 /* Retrieve an ACL from the server */
1735 static struct cifs_ntsd *
1736 get_smb2_acl(struct cifs_sb_info *cifs_sb,
1737                                       struct inode *inode, const char *path,
1738                                       u32 *pacllen)
1739 {
1740         struct cifs_ntsd *pntsd = NULL;
1741         struct cifsFileInfo *open_file = NULL;
1742
1743         if (inode)
1744                 open_file = find_readable_file(CIFS_I(inode), true);
1745         if (!open_file)
1746                 return get_smb2_acl_by_path(cifs_sb, path, pacllen);
1747
1748         pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen);
1749         cifsFileInfo_put(open_file);
1750         return pntsd;
1751 }
1752 #endif
1753
1754 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
1755                             loff_t offset, loff_t len, bool keep_size)
1756 {
1757         struct inode *inode;
1758         struct cifsInodeInfo *cifsi;
1759         struct cifsFileInfo *cfile = file->private_data;
1760         struct file_zero_data_information fsctl_buf;
1761         long rc;
1762         unsigned int xid;
1763
1764         xid = get_xid();
1765
1766         inode = d_inode(cfile->dentry);
1767         cifsi = CIFS_I(inode);
1768
1769         /* if file not oplocked can't be sure whether asking to extend size */
1770         if (!CIFS_CACHE_READ(cifsi))
1771                 if (keep_size == false) {
1772                         rc = -EOPNOTSUPP;
1773                         free_xid(xid);
1774                         return rc;
1775                 }
1776
1777         /*
1778          * Must check if file sparse since fallocate -z (zero range) assumes
1779          * non-sparse allocation
1780          */
1781         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) {
1782                 rc = -EOPNOTSUPP;
1783                 free_xid(xid);
1784                 return rc;
1785         }
1786
1787         /*
1788          * need to make sure we are not asked to extend the file since the SMB3
1789          * fsctl does not change the file size. In the future we could change
1790          * this to zero the first part of the range then set the file size
1791          * which for a non sparse file would zero the newly extended range
1792          */
1793         if (keep_size == false)
1794                 if (i_size_read(inode) < offset + len) {
1795                         rc = -EOPNOTSUPP;
1796                         free_xid(xid);
1797                         return rc;
1798                 }
1799
1800         cifs_dbg(FYI, "offset %lld len %lld", offset, len);
1801
1802         fsctl_buf.FileOffset = cpu_to_le64(offset);
1803         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
1804
1805         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1806                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
1807                         true /* is_fctl */, (char *)&fsctl_buf,
1808                         sizeof(struct file_zero_data_information), NULL, NULL);
1809         free_xid(xid);
1810         return rc;
1811 }
1812
1813 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
1814                             loff_t offset, loff_t len)
1815 {
1816         struct inode *inode;
1817         struct cifsInodeInfo *cifsi;
1818         struct cifsFileInfo *cfile = file->private_data;
1819         struct file_zero_data_information fsctl_buf;
1820         long rc;
1821         unsigned int xid;
1822         __u8 set_sparse = 1;
1823
1824         xid = get_xid();
1825
1826         inode = d_inode(cfile->dentry);
1827         cifsi = CIFS_I(inode);
1828
1829         /* Need to make file sparse, if not already, before freeing range. */
1830         /* Consider adding equivalent for compressed since it could also work */
1831         if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse)) {
1832                 rc = -EOPNOTSUPP;
1833                 free_xid(xid);
1834                 return rc;
1835         }
1836
1837         cifs_dbg(FYI, "offset %lld len %lld", offset, len);
1838
1839         fsctl_buf.FileOffset = cpu_to_le64(offset);
1840         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
1841
1842         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1843                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
1844                         true /* is_fctl */, (char *)&fsctl_buf,
1845                         sizeof(struct file_zero_data_information), NULL, NULL);
1846         free_xid(xid);
1847         return rc;
1848 }
1849
1850 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
1851                             loff_t off, loff_t len, bool keep_size)
1852 {
1853         struct inode *inode;
1854         struct cifsInodeInfo *cifsi;
1855         struct cifsFileInfo *cfile = file->private_data;
1856         long rc = -EOPNOTSUPP;
1857         unsigned int xid;
1858
1859         xid = get_xid();
1860
1861         inode = d_inode(cfile->dentry);
1862         cifsi = CIFS_I(inode);
1863
1864         /* if file not oplocked can't be sure whether asking to extend size */
1865         if (!CIFS_CACHE_READ(cifsi))
1866                 if (keep_size == false) {
1867                         free_xid(xid);
1868                         return rc;
1869                 }
1870
1871         /*
1872          * Files are non-sparse by default so falloc may be a no-op
1873          * Must check if file sparse. If not sparse, and not extending
1874          * then no need to do anything since file already allocated
1875          */
1876         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
1877                 if (keep_size == true)
1878                         rc = 0;
1879                 /* check if extending file */
1880                 else if (i_size_read(inode) >= off + len)
1881                         /* not extending file and already not sparse */
1882                         rc = 0;
1883                 /* BB: in future add else clause to extend file */
1884                 else
1885                         rc = -EOPNOTSUPP;
1886                 free_xid(xid);
1887                 return rc;
1888         }
1889
1890         if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
1891                 /*
1892                  * Check if falloc starts within first few pages of file
1893                  * and ends within a few pages of the end of file to
1894                  * ensure that most of file is being forced to be
1895                  * fallocated now. If so then setting whole file sparse
1896                  * ie potentially making a few extra pages at the beginning
1897                  * or end of the file non-sparse via set_sparse is harmless.
1898                  */
1899                 if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) {
1900                         rc = -EOPNOTSUPP;
1901                         free_xid(xid);
1902                         return rc;
1903                 }
1904
1905                 rc = smb2_set_sparse(xid, tcon, cfile, inode, false);
1906         }
1907         /* BB: else ... in future add code to extend file and set sparse */
1908
1909
1910         free_xid(xid);
1911         return rc;
1912 }
1913
1914
1915 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
1916                            loff_t off, loff_t len)
1917 {
1918         /* KEEP_SIZE already checked for by do_fallocate */
1919         if (mode & FALLOC_FL_PUNCH_HOLE)
1920                 return smb3_punch_hole(file, tcon, off, len);
1921         else if (mode & FALLOC_FL_ZERO_RANGE) {
1922                 if (mode & FALLOC_FL_KEEP_SIZE)
1923                         return smb3_zero_range(file, tcon, off, len, true);
1924                 return smb3_zero_range(file, tcon, off, len, false);
1925         } else if (mode == FALLOC_FL_KEEP_SIZE)
1926                 return smb3_simple_falloc(file, tcon, off, len, true);
1927         else if (mode == 0)
1928                 return smb3_simple_falloc(file, tcon, off, len, false);
1929
1930         return -EOPNOTSUPP;
1931 }
1932
1933 static void
1934 smb2_downgrade_oplock(struct TCP_Server_Info *server,
1935                         struct cifsInodeInfo *cinode, bool set_level2)
1936 {
1937         if (set_level2)
1938                 server->ops->set_oplock_level(cinode, SMB2_OPLOCK_LEVEL_II,
1939                                                 0, NULL);
1940         else
1941                 server->ops->set_oplock_level(cinode, 0, 0, NULL);
1942 }
1943
1944 static void
1945 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1946                       unsigned int epoch, bool *purge_cache)
1947 {
1948         oplock &= 0xFF;
1949         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
1950                 return;
1951         if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
1952                 cinode->oplock = CIFS_CACHE_RHW_FLG;
1953                 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
1954                          &cinode->vfs_inode);
1955         } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
1956                 cinode->oplock = CIFS_CACHE_RW_FLG;
1957                 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
1958                          &cinode->vfs_inode);
1959         } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
1960                 cinode->oplock = CIFS_CACHE_READ_FLG;
1961                 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
1962                          &cinode->vfs_inode);
1963         } else
1964                 cinode->oplock = 0;
1965 }
1966
1967 static void
1968 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1969                        unsigned int epoch, bool *purge_cache)
1970 {
1971         char message[5] = {0};
1972
1973         oplock &= 0xFF;
1974         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
1975                 return;
1976
1977         cinode->oplock = 0;
1978         if (oplock & SMB2_LEASE_READ_CACHING_HE) {
1979                 cinode->oplock |= CIFS_CACHE_READ_FLG;
1980                 strcat(message, "R");
1981         }
1982         if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
1983                 cinode->oplock |= CIFS_CACHE_HANDLE_FLG;
1984                 strcat(message, "H");
1985         }
1986         if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
1987                 cinode->oplock |= CIFS_CACHE_WRITE_FLG;
1988                 strcat(message, "W");
1989         }
1990         if (!cinode->oplock)
1991                 strcat(message, "None");
1992         cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
1993                  &cinode->vfs_inode);
1994 }
1995
1996 static void
1997 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1998                       unsigned int epoch, bool *purge_cache)
1999 {
2000         unsigned int old_oplock = cinode->oplock;
2001
2002         smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
2003
2004         if (purge_cache) {
2005                 *purge_cache = false;
2006                 if (old_oplock == CIFS_CACHE_READ_FLG) {
2007                         if (cinode->oplock == CIFS_CACHE_READ_FLG &&
2008                             (epoch - cinode->epoch > 0))
2009                                 *purge_cache = true;
2010                         else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
2011                                  (epoch - cinode->epoch > 1))
2012                                 *purge_cache = true;
2013                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
2014                                  (epoch - cinode->epoch > 1))
2015                                 *purge_cache = true;
2016                         else if (cinode->oplock == 0 &&
2017                                  (epoch - cinode->epoch > 0))
2018                                 *purge_cache = true;
2019                 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
2020                         if (cinode->oplock == CIFS_CACHE_RH_FLG &&
2021                             (epoch - cinode->epoch > 0))
2022                                 *purge_cache = true;
2023                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
2024                                  (epoch - cinode->epoch > 1))
2025                                 *purge_cache = true;
2026                 }
2027                 cinode->epoch = epoch;
2028         }
2029 }
2030
2031 static bool
2032 smb2_is_read_op(__u32 oplock)
2033 {
2034         return oplock == SMB2_OPLOCK_LEVEL_II;
2035 }
2036
2037 static bool
2038 smb21_is_read_op(__u32 oplock)
2039 {
2040         return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
2041                !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
2042 }
2043
2044 static __le32
2045 map_oplock_to_lease(u8 oplock)
2046 {
2047         if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
2048                 return SMB2_LEASE_WRITE_CACHING | SMB2_LEASE_READ_CACHING;
2049         else if (oplock == SMB2_OPLOCK_LEVEL_II)
2050                 return SMB2_LEASE_READ_CACHING;
2051         else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
2052                 return SMB2_LEASE_HANDLE_CACHING | SMB2_LEASE_READ_CACHING |
2053                        SMB2_LEASE_WRITE_CACHING;
2054         return 0;
2055 }
2056
2057 static char *
2058 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
2059 {
2060         struct create_lease *buf;
2061
2062         buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
2063         if (!buf)
2064                 return NULL;
2065
2066         buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
2067         buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
2068         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
2069
2070         buf->ccontext.DataOffset = cpu_to_le16(offsetof
2071                                         (struct create_lease, lcontext));
2072         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
2073         buf->ccontext.NameOffset = cpu_to_le16(offsetof
2074                                 (struct create_lease, Name));
2075         buf->ccontext.NameLength = cpu_to_le16(4);
2076         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
2077         buf->Name[0] = 'R';
2078         buf->Name[1] = 'q';
2079         buf->Name[2] = 'L';
2080         buf->Name[3] = 's';
2081         return (char *)buf;
2082 }
2083
2084 static char *
2085 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
2086 {
2087         struct create_lease_v2 *buf;
2088
2089         buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
2090         if (!buf)
2091                 return NULL;
2092
2093         buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
2094         buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
2095         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
2096
2097         buf->ccontext.DataOffset = cpu_to_le16(offsetof
2098                                         (struct create_lease_v2, lcontext));
2099         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
2100         buf->ccontext.NameOffset = cpu_to_le16(offsetof
2101                                 (struct create_lease_v2, Name));
2102         buf->ccontext.NameLength = cpu_to_le16(4);
2103         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
2104         buf->Name[0] = 'R';
2105         buf->Name[1] = 'q';
2106         buf->Name[2] = 'L';
2107         buf->Name[3] = 's';
2108         return (char *)buf;
2109 }
2110
2111 static __u8
2112 smb2_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
2113 {
2114         struct create_lease *lc = (struct create_lease *)buf;
2115
2116         *epoch = 0; /* not used */
2117         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
2118                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
2119         return le32_to_cpu(lc->lcontext.LeaseState);
2120 }
2121
2122 static __u8
2123 smb3_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
2124 {
2125         struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
2126
2127         *epoch = le16_to_cpu(lc->lcontext.Epoch);
2128         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
2129                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
2130         if (lease_key)
2131                 memcpy(lease_key, &lc->lcontext.LeaseKeyLow,
2132                        SMB2_LEASE_KEY_SIZE);
2133         return le32_to_cpu(lc->lcontext.LeaseState);
2134 }
2135
2136 static unsigned int
2137 smb2_wp_retry_size(struct inode *inode)
2138 {
2139         return min_t(unsigned int, CIFS_SB(inode->i_sb)->wsize,
2140                      SMB2_MAX_BUFFER_SIZE);
2141 }
2142
2143 static bool
2144 smb2_dir_needs_close(struct cifsFileInfo *cfile)
2145 {
2146         return !cfile->invalidHandle;
2147 }
2148
2149 static void
2150 fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len,
2151                    struct smb_rqst *old_rq)
2152 {
2153         struct smb2_sync_hdr *shdr =
2154                         (struct smb2_sync_hdr *)old_rq->rq_iov[1].iov_base;
2155
2156         memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr));
2157         tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
2158         tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
2159         tr_hdr->Flags = cpu_to_le16(0x01);
2160         get_random_bytes(&tr_hdr->Nonce, SMB3_AES128CMM_NONCE);
2161         memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8);
2162 }
2163
2164 /* We can not use the normal sg_set_buf() as we will sometimes pass a
2165  * stack object as buf.
2166  */
2167 static inline void smb2_sg_set_buf(struct scatterlist *sg, const void *buf,
2168                                    unsigned int buflen)
2169 {
2170         sg_set_page(sg, virt_to_page(buf), buflen, offset_in_page(buf));
2171 }
2172
2173 /* Assumes:
2174  * rqst->rq_iov[0]  is rfc1002 length
2175  * rqst->rq_iov[1]  is tranform header
2176  * rqst->rq_iov[2+] data to be encrypted/decrypted
2177  */
2178 static struct scatterlist *
2179 init_sg(struct smb_rqst *rqst, u8 *sign)
2180 {
2181         unsigned int sg_len = rqst->rq_nvec + rqst->rq_npages;
2182         unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20;
2183         struct scatterlist *sg;
2184         unsigned int i;
2185         unsigned int j;
2186
2187         sg = kmalloc_array(sg_len, sizeof(struct scatterlist), GFP_KERNEL);
2188         if (!sg)
2189                 return NULL;
2190
2191         sg_init_table(sg, sg_len);
2192         smb2_sg_set_buf(&sg[0], rqst->rq_iov[1].iov_base + 20, assoc_data_len);
2193         for (i = 1; i < rqst->rq_nvec - 1; i++)
2194                 smb2_sg_set_buf(&sg[i], rqst->rq_iov[i+1].iov_base,
2195                                                 rqst->rq_iov[i+1].iov_len);
2196         for (j = 0; i < sg_len - 1; i++, j++) {
2197                 unsigned int len, offset;
2198
2199                 rqst_page_get_length(rqst, j, &len, &offset);
2200                 sg_set_page(&sg[i], rqst->rq_pages[j], len, offset);
2201         }
2202         smb2_sg_set_buf(&sg[sg_len - 1], sign, SMB2_SIGNATURE_SIZE);
2203         return sg;
2204 }
2205
2206 static int
2207 smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key)
2208 {
2209         struct cifs_ses *ses;
2210         u8 *ses_enc_key;
2211
2212         spin_lock(&cifs_tcp_ses_lock);
2213         list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
2214                 if (ses->Suid != ses_id)
2215                         continue;
2216                 ses_enc_key = enc ? ses->smb3encryptionkey :
2217                                                         ses->smb3decryptionkey;
2218                 memcpy(key, ses_enc_key, SMB3_SIGN_KEY_SIZE);
2219                 spin_unlock(&cifs_tcp_ses_lock);
2220                 return 0;
2221         }
2222         spin_unlock(&cifs_tcp_ses_lock);
2223
2224         return 1;
2225 }
2226 /*
2227  * Encrypt or decrypt @rqst message. @rqst has the following format:
2228  * iov[0] - rfc1002 length
2229  * iov[1] - transform header (associate data),
2230  * iov[2-N] and pages - data to encrypt.
2231  * On success return encrypted data in iov[2-N] and pages, leave iov[0-1]
2232  * untouched.
2233  */
2234 static int
2235 crypt_message(struct TCP_Server_Info *server, struct smb_rqst *rqst, int enc)
2236 {
2237         struct smb2_transform_hdr *tr_hdr =
2238                         (struct smb2_transform_hdr *)rqst->rq_iov[1].iov_base;
2239         unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20;
2240         int rc = 0;
2241         struct scatterlist *sg;
2242         u8 sign[SMB2_SIGNATURE_SIZE] = {};
2243         u8 key[SMB3_SIGN_KEY_SIZE];
2244         struct aead_request *req;
2245         char *iv;
2246         unsigned int iv_len;
2247         DECLARE_CRYPTO_WAIT(wait);
2248         struct crypto_aead *tfm;
2249         unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
2250
2251         rc = smb2_get_enc_key(server, tr_hdr->SessionId, enc, key);
2252         if (rc) {
2253                 cifs_dbg(VFS, "%s: Could not get %scryption key\n", __func__,
2254                          enc ? "en" : "de");
2255                 return 0;
2256         }
2257
2258         rc = smb3_crypto_aead_allocate(server);
2259         if (rc) {
2260                 cifs_dbg(VFS, "%s: crypto alloc failed\n", __func__);
2261                 return rc;
2262         }
2263
2264         tfm = enc ? server->secmech.ccmaesencrypt :
2265                                                 server->secmech.ccmaesdecrypt;
2266         rc = crypto_aead_setkey(tfm, key, SMB3_SIGN_KEY_SIZE);
2267         if (rc) {
2268                 cifs_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc);
2269                 return rc;
2270         }
2271
2272         rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE);
2273         if (rc) {
2274                 cifs_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc);
2275                 return rc;
2276         }
2277
2278         req = aead_request_alloc(tfm, GFP_KERNEL);
2279         if (!req) {
2280                 cifs_dbg(VFS, "%s: Failed to alloc aead request", __func__);
2281                 return -ENOMEM;
2282         }
2283
2284         if (!enc) {
2285                 memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE);
2286                 crypt_len += SMB2_SIGNATURE_SIZE;
2287         }
2288
2289         sg = init_sg(rqst, sign);
2290         if (!sg) {
2291                 cifs_dbg(VFS, "%s: Failed to init sg", __func__);
2292                 rc = -ENOMEM;
2293                 goto free_req;
2294         }
2295
2296         iv_len = crypto_aead_ivsize(tfm);
2297         iv = kzalloc(iv_len, GFP_KERNEL);
2298         if (!iv) {
2299                 cifs_dbg(VFS, "%s: Failed to alloc IV", __func__);
2300                 rc = -ENOMEM;
2301                 goto free_sg;
2302         }
2303         iv[0] = 3;
2304         memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES128CMM_NONCE);
2305
2306         aead_request_set_crypt(req, sg, sg, crypt_len, iv);
2307         aead_request_set_ad(req, assoc_data_len);
2308
2309         aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
2310                                   crypto_req_done, &wait);
2311
2312         rc = crypto_wait_req(enc ? crypto_aead_encrypt(req)
2313                                 : crypto_aead_decrypt(req), &wait);
2314
2315         if (!rc && enc)
2316                 memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE);
2317
2318         kfree(iv);
2319 free_sg:
2320         kfree(sg);
2321 free_req:
2322         kfree(req);
2323         return rc;
2324 }
2325
2326 /*
2327  * This is called from smb_send_rqst. At this point we have the rfc1002
2328  * header as the first element in the vector.
2329  */
2330 static int
2331 smb3_init_transform_rq(struct TCP_Server_Info *server, struct smb_rqst *new_rq,
2332                        struct smb_rqst *old_rq)
2333 {
2334         struct kvec *iov;
2335         struct page **pages;
2336         struct smb2_transform_hdr *tr_hdr;
2337         unsigned int npages = old_rq->rq_npages;
2338         unsigned int orig_len = get_rfc1002_length(old_rq->rq_iov[0].iov_base);
2339         int i;
2340         int rc = -ENOMEM;
2341
2342         pages = kmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
2343         if (!pages)
2344                 return rc;
2345
2346         new_rq->rq_pages = pages;
2347         new_rq->rq_offset = old_rq->rq_offset;
2348         new_rq->rq_npages = old_rq->rq_npages;
2349         new_rq->rq_pagesz = old_rq->rq_pagesz;
2350         new_rq->rq_tailsz = old_rq->rq_tailsz;
2351
2352         for (i = 0; i < npages; i++) {
2353                 pages[i] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
2354                 if (!pages[i])
2355                         goto err_free_pages;
2356         }
2357
2358         /* Make space for one extra iov to hold the transform header */
2359         iov = kmalloc_array(old_rq->rq_nvec + 1, sizeof(struct kvec),
2360                             GFP_KERNEL);
2361         if (!iov)
2362                 goto err_free_pages;
2363
2364         /* copy all iovs from the old except the 1st one (rfc1002 length) */
2365         memcpy(&iov[2], &old_rq->rq_iov[1],
2366                                 sizeof(struct kvec) * (old_rq->rq_nvec - 1));
2367         /* copy the rfc1002 iov */
2368         iov[0].iov_base = old_rq->rq_iov[0].iov_base;
2369         iov[0].iov_len  = old_rq->rq_iov[0].iov_len;
2370
2371         new_rq->rq_iov = iov;
2372         new_rq->rq_nvec = old_rq->rq_nvec + 1;
2373
2374         tr_hdr = kmalloc(sizeof(struct smb2_transform_hdr), GFP_KERNEL);
2375         if (!tr_hdr)
2376                 goto err_free_iov;
2377
2378         /* fill the 2nd iov with a transform header */
2379         fill_transform_hdr(tr_hdr, orig_len, old_rq);
2380         new_rq->rq_iov[1].iov_base = tr_hdr;
2381         new_rq->rq_iov[1].iov_len = sizeof(struct smb2_transform_hdr);
2382
2383         /* Update rfc1002 header */
2384         inc_rfc1001_len(new_rq->rq_iov[0].iov_base,
2385                         sizeof(struct smb2_transform_hdr));
2386
2387         /* copy pages form the old */
2388         for (i = 0; i < npages; i++) {
2389                 char *dst, *src;
2390                 unsigned int offset, len;
2391
2392                 rqst_page_get_length(new_rq, i, &len, &offset);
2393
2394                 dst = (char *) kmap(new_rq->rq_pages[i]) + offset;
2395                 src = (char *) kmap(old_rq->rq_pages[i]) + offset;
2396
2397                 memcpy(dst, src, len);
2398                 kunmap(new_rq->rq_pages[i]);
2399                 kunmap(old_rq->rq_pages[i]);
2400         }
2401
2402         rc = crypt_message(server, new_rq, 1);
2403         cifs_dbg(FYI, "encrypt message returned %d", rc);
2404         if (rc)
2405                 goto err_free_tr_hdr;
2406
2407         return rc;
2408
2409 err_free_tr_hdr:
2410         kfree(tr_hdr);
2411 err_free_iov:
2412         kfree(iov);
2413 err_free_pages:
2414         for (i = i - 1; i >= 0; i--)
2415                 put_page(pages[i]);
2416         kfree(pages);
2417         return rc;
2418 }
2419
2420 static void
2421 smb3_free_transform_rq(struct smb_rqst *rqst)
2422 {
2423         int i = rqst->rq_npages - 1;
2424
2425         for (; i >= 0; i--)
2426                 put_page(rqst->rq_pages[i]);
2427         kfree(rqst->rq_pages);
2428         /* free transform header */
2429         kfree(rqst->rq_iov[1].iov_base);
2430         kfree(rqst->rq_iov);
2431 }
2432
2433 static int
2434 smb3_is_transform_hdr(void *buf)
2435 {
2436         struct smb2_transform_hdr *trhdr = buf;
2437
2438         return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
2439 }
2440
2441 static int
2442 decrypt_raw_data(struct TCP_Server_Info *server, char *buf,
2443                  unsigned int buf_data_size, struct page **pages,
2444                  unsigned int npages, unsigned int page_data_size)
2445 {
2446         struct kvec iov[3];
2447         struct smb_rqst rqst = {NULL};
2448         int rc;
2449
2450         iov[0].iov_base = NULL;
2451         iov[0].iov_len = 0;
2452         iov[1].iov_base = buf;
2453         iov[1].iov_len = sizeof(struct smb2_transform_hdr);
2454         iov[2].iov_base = buf + sizeof(struct smb2_transform_hdr);
2455         iov[2].iov_len = buf_data_size;
2456
2457         rqst.rq_iov = iov;
2458         rqst.rq_nvec = 3;
2459         rqst.rq_pages = pages;
2460         rqst.rq_npages = npages;
2461         rqst.rq_pagesz = PAGE_SIZE;
2462         rqst.rq_tailsz = (page_data_size % PAGE_SIZE) ? : PAGE_SIZE;
2463
2464         rc = crypt_message(server, &rqst, 0);
2465         cifs_dbg(FYI, "decrypt message returned %d\n", rc);
2466
2467         if (rc)
2468                 return rc;
2469
2470         memmove(buf, iov[2].iov_base, buf_data_size);
2471
2472         server->total_read = buf_data_size + page_data_size;
2473
2474         return rc;
2475 }
2476
2477 static int
2478 read_data_into_pages(struct TCP_Server_Info *server, struct page **pages,
2479                      unsigned int npages, unsigned int len)
2480 {
2481         int i;
2482         int length;
2483
2484         for (i = 0; i < npages; i++) {
2485                 struct page *page = pages[i];
2486                 size_t n;
2487
2488                 n = len;
2489                 if (len >= PAGE_SIZE) {
2490                         /* enough data to fill the page */
2491                         n = PAGE_SIZE;
2492                         len -= n;
2493                 } else {
2494                         zero_user(page, len, PAGE_SIZE - len);
2495                         len = 0;
2496                 }
2497                 length = cifs_read_page_from_socket(server, page, 0, n);
2498                 if (length < 0)
2499                         return length;
2500                 server->total_read += length;
2501         }
2502
2503         return 0;
2504 }
2505
2506 static int
2507 init_read_bvec(struct page **pages, unsigned int npages, unsigned int data_size,
2508                unsigned int cur_off, struct bio_vec **page_vec)
2509 {
2510         struct bio_vec *bvec;
2511         int i;
2512
2513         bvec = kcalloc(npages, sizeof(struct bio_vec), GFP_KERNEL);
2514         if (!bvec)
2515                 return -ENOMEM;
2516
2517         for (i = 0; i < npages; i++) {
2518                 bvec[i].bv_page = pages[i];
2519                 bvec[i].bv_offset = (i == 0) ? cur_off : 0;
2520                 bvec[i].bv_len = min_t(unsigned int, PAGE_SIZE, data_size);
2521                 data_size -= bvec[i].bv_len;
2522         }
2523
2524         if (data_size != 0) {
2525                 cifs_dbg(VFS, "%s: something went wrong\n", __func__);
2526                 kfree(bvec);
2527                 return -EIO;
2528         }
2529
2530         *page_vec = bvec;
2531         return 0;
2532 }
2533
2534 static int
2535 handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid,
2536                  char *buf, unsigned int buf_len, struct page **pages,
2537                  unsigned int npages, unsigned int page_data_size)
2538 {
2539         unsigned int data_offset;
2540         unsigned int data_len;
2541         unsigned int cur_off;
2542         unsigned int cur_page_idx;
2543         unsigned int pad_len;
2544         struct cifs_readdata *rdata = mid->callback_data;
2545         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
2546         struct bio_vec *bvec = NULL;
2547         struct iov_iter iter;
2548         struct kvec iov;
2549         int length;
2550         bool use_rdma_mr = false;
2551
2552         if (shdr->Command != SMB2_READ) {
2553                 cifs_dbg(VFS, "only big read responses are supported\n");
2554                 return -ENOTSUPP;
2555         }
2556
2557         if (server->ops->is_session_expired &&
2558             server->ops->is_session_expired(buf)) {
2559                 cifs_reconnect(server);
2560                 wake_up(&server->response_q);
2561                 return -1;
2562         }
2563
2564         if (server->ops->is_status_pending &&
2565                         server->ops->is_status_pending(buf, server, 0))
2566                 return -1;
2567
2568         rdata->result = server->ops->map_error(buf, false);
2569         if (rdata->result != 0) {
2570                 cifs_dbg(FYI, "%s: server returned error %d\n",
2571                          __func__, rdata->result);
2572                 dequeue_mid(mid, rdata->result);
2573                 return 0;
2574         }
2575
2576         data_offset = server->ops->read_data_offset(buf);
2577 #ifdef CONFIG_CIFS_SMB_DIRECT
2578         use_rdma_mr = rdata->mr;
2579 #endif
2580         data_len = server->ops->read_data_length(buf, use_rdma_mr);
2581
2582         if (data_offset < server->vals->read_rsp_size) {
2583                 /*
2584                  * win2k8 sometimes sends an offset of 0 when the read
2585                  * is beyond the EOF. Treat it as if the data starts just after
2586                  * the header.
2587                  */
2588                 cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n",
2589                          __func__, data_offset);
2590                 data_offset = server->vals->read_rsp_size;
2591         } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) {
2592                 /* data_offset is beyond the end of smallbuf */
2593                 cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n",
2594                          __func__, data_offset);
2595                 rdata->result = -EIO;
2596                 dequeue_mid(mid, rdata->result);
2597                 return 0;
2598         }
2599
2600         pad_len = data_offset - server->vals->read_rsp_size;
2601
2602         if (buf_len <= data_offset) {
2603                 /* read response payload is in pages */
2604                 cur_page_idx = pad_len / PAGE_SIZE;
2605                 cur_off = pad_len % PAGE_SIZE;
2606
2607                 if (cur_page_idx != 0) {
2608                         /* data offset is beyond the 1st page of response */
2609                         cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n",
2610                                  __func__, data_offset);
2611                         rdata->result = -EIO;
2612                         dequeue_mid(mid, rdata->result);
2613                         return 0;
2614                 }
2615
2616                 if (data_len > page_data_size - pad_len) {
2617                         /* data_len is corrupt -- discard frame */
2618                         rdata->result = -EIO;
2619                         dequeue_mid(mid, rdata->result);
2620                         return 0;
2621                 }
2622
2623                 rdata->result = init_read_bvec(pages, npages, page_data_size,
2624                                                cur_off, &bvec);
2625                 if (rdata->result != 0) {
2626                         dequeue_mid(mid, rdata->result);
2627                         return 0;
2628                 }
2629
2630                 iov_iter_bvec(&iter, WRITE | ITER_BVEC, bvec, npages, data_len);
2631         } else if (buf_len >= data_offset + data_len) {
2632                 /* read response payload is in buf */
2633                 WARN_ONCE(npages > 0, "read data can be either in buf or in pages");
2634                 iov.iov_base = buf + data_offset;
2635                 iov.iov_len = data_len;
2636                 iov_iter_kvec(&iter, WRITE | ITER_KVEC, &iov, 1, data_len);
2637         } else {
2638                 /* read response payload cannot be in both buf and pages */
2639                 WARN_ONCE(1, "buf can not contain only a part of read data");
2640                 rdata->result = -EIO;
2641                 dequeue_mid(mid, rdata->result);
2642                 return 0;
2643         }
2644
2645         /* set up first iov for signature check */
2646         rdata->iov[0].iov_base = buf;
2647         rdata->iov[0].iov_len = 4;
2648         rdata->iov[1].iov_base = buf + 4;
2649         rdata->iov[1].iov_len = server->vals->read_rsp_size - 4;
2650         cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n",
2651                  rdata->iov[0].iov_base, server->vals->read_rsp_size);
2652
2653         length = rdata->copy_into_pages(server, rdata, &iter);
2654
2655         kfree(bvec);
2656
2657         if (length < 0)
2658                 return length;
2659
2660         dequeue_mid(mid, false);
2661         return length;
2662 }
2663
2664 static int
2665 receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid)
2666 {
2667         char *buf = server->smallbuf;
2668         struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
2669         unsigned int npages;
2670         struct page **pages;
2671         unsigned int len;
2672         unsigned int buflen = server->pdu_size;
2673         int rc;
2674         int i = 0;
2675
2676         len = min_t(unsigned int, buflen, server->vals->read_rsp_size +
2677                 sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1;
2678
2679         rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len);
2680         if (rc < 0)
2681                 return rc;
2682         server->total_read += rc;
2683
2684         len = le32_to_cpu(tr_hdr->OriginalMessageSize) -
2685                 server->vals->read_rsp_size;
2686         npages = DIV_ROUND_UP(len, PAGE_SIZE);
2687
2688         pages = kmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
2689         if (!pages) {
2690                 rc = -ENOMEM;
2691                 goto discard_data;
2692         }
2693
2694         for (; i < npages; i++) {
2695                 pages[i] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
2696                 if (!pages[i]) {
2697                         rc = -ENOMEM;
2698                         goto discard_data;
2699                 }
2700         }
2701
2702         /* read read data into pages */
2703         rc = read_data_into_pages(server, pages, npages, len);
2704         if (rc)
2705                 goto free_pages;
2706
2707         rc = cifs_discard_remaining_data(server);
2708         if (rc)
2709                 goto free_pages;
2710
2711         rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size,
2712                               pages, npages, len);
2713         if (rc)
2714                 goto free_pages;
2715
2716         *mid = smb2_find_mid(server, buf);
2717         if (*mid == NULL)
2718                 cifs_dbg(FYI, "mid not found\n");
2719         else {
2720                 cifs_dbg(FYI, "mid found\n");
2721                 (*mid)->decrypted = true;
2722                 rc = handle_read_data(server, *mid, buf,
2723                                       server->vals->read_rsp_size,
2724                                       pages, npages, len);
2725         }
2726
2727 free_pages:
2728         for (i = i - 1; i >= 0; i--)
2729                 put_page(pages[i]);
2730         kfree(pages);
2731         return rc;
2732 discard_data:
2733         cifs_discard_remaining_data(server);
2734         goto free_pages;
2735 }
2736
2737 static int
2738 receive_encrypted_standard(struct TCP_Server_Info *server,
2739                            struct mid_q_entry **mid)
2740 {
2741         int length;
2742         char *buf = server->smallbuf;
2743         unsigned int pdu_length = server->pdu_size;
2744         unsigned int buf_size;
2745         struct mid_q_entry *mid_entry;
2746
2747         /* switch to large buffer if too big for a small one */
2748         if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE) {
2749                 server->large_buf = true;
2750                 memcpy(server->bigbuf, buf, server->total_read);
2751                 buf = server->bigbuf;
2752         }
2753
2754         /* now read the rest */
2755         length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
2756                                 pdu_length - HEADER_SIZE(server) + 1);
2757         if (length < 0)
2758                 return length;
2759         server->total_read += length;
2760
2761         buf_size = pdu_length - sizeof(struct smb2_transform_hdr);
2762         length = decrypt_raw_data(server, buf, buf_size, NULL, 0, 0);
2763         if (length)
2764                 return length;
2765
2766         mid_entry = smb2_find_mid(server, buf);
2767         if (mid_entry == NULL)
2768                 cifs_dbg(FYI, "mid not found\n");
2769         else {
2770                 cifs_dbg(FYI, "mid found\n");
2771                 mid_entry->decrypted = true;
2772         }
2773
2774         *mid = mid_entry;
2775
2776         if (mid_entry && mid_entry->handle)
2777                 return mid_entry->handle(server, mid_entry);
2778
2779         return cifs_handle_standard(server, mid_entry);
2780 }
2781
2782 static int
2783 smb3_receive_transform(struct TCP_Server_Info *server, struct mid_q_entry **mid)
2784 {
2785         char *buf = server->smallbuf;
2786         unsigned int pdu_length = server->pdu_size;
2787         struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
2788         unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
2789
2790         if (pdu_length < sizeof(struct smb2_transform_hdr) +
2791                                                 sizeof(struct smb2_sync_hdr)) {
2792                 cifs_dbg(VFS, "Transform message is too small (%u)\n",
2793                          pdu_length);
2794                 cifs_reconnect(server);
2795                 wake_up(&server->response_q);
2796                 return -ECONNABORTED;
2797         }
2798
2799         if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) {
2800                 cifs_dbg(VFS, "Transform message is broken\n");
2801                 cifs_reconnect(server);
2802                 wake_up(&server->response_q);
2803                 return -ECONNABORTED;
2804         }
2805
2806         if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server))
2807                 return receive_encrypted_read(server, mid);
2808
2809         return receive_encrypted_standard(server, mid);
2810 }
2811
2812 int
2813 smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid)
2814 {
2815         char *buf = server->large_buf ? server->bigbuf : server->smallbuf;
2816
2817         return handle_read_data(server, mid, buf, server->pdu_size,
2818                                 NULL, 0, 0);
2819 }
2820
2821 static int
2822 smb2_next_header(char *buf)
2823 {
2824         struct smb2_sync_hdr *hdr = (struct smb2_sync_hdr *)buf;
2825         struct smb2_transform_hdr *t_hdr = (struct smb2_transform_hdr *)buf;
2826
2827         if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM)
2828                 return sizeof(struct smb2_transform_hdr) +
2829                   le32_to_cpu(t_hdr->OriginalMessageSize);
2830
2831         return le32_to_cpu(hdr->NextCommand);
2832 }
2833
2834 struct smb_version_operations smb20_operations = {
2835         .compare_fids = smb2_compare_fids,
2836         .setup_request = smb2_setup_request,
2837         .setup_async_request = smb2_setup_async_request,
2838         .check_receive = smb2_check_receive,
2839         .add_credits = smb2_add_credits,
2840         .set_credits = smb2_set_credits,
2841         .get_credits_field = smb2_get_credits_field,
2842         .get_credits = smb2_get_credits,
2843         .wait_mtu_credits = cifs_wait_mtu_credits,
2844         .get_next_mid = smb2_get_next_mid,
2845         .read_data_offset = smb2_read_data_offset,
2846         .read_data_length = smb2_read_data_length,
2847         .map_error = map_smb2_to_linux_error,
2848         .find_mid = smb2_find_mid,
2849         .check_message = smb2_check_message,
2850         .dump_detail = smb2_dump_detail,
2851         .clear_stats = smb2_clear_stats,
2852         .print_stats = smb2_print_stats,
2853         .is_oplock_break = smb2_is_valid_oplock_break,
2854         .handle_cancelled_mid = smb2_handle_cancelled_mid,
2855         .downgrade_oplock = smb2_downgrade_oplock,
2856         .need_neg = smb2_need_neg,
2857         .negotiate = smb2_negotiate,
2858         .negotiate_wsize = smb2_negotiate_wsize,
2859         .negotiate_rsize = smb2_negotiate_rsize,
2860         .sess_setup = SMB2_sess_setup,
2861         .logoff = SMB2_logoff,
2862         .tree_connect = SMB2_tcon,
2863         .tree_disconnect = SMB2_tdis,
2864         .qfs_tcon = smb2_qfs_tcon,
2865         .is_path_accessible = smb2_is_path_accessible,
2866         .can_echo = smb2_can_echo,
2867         .echo = SMB2_echo,
2868         .query_path_info = smb2_query_path_info,
2869         .get_srv_inum = smb2_get_srv_inum,
2870         .query_file_info = smb2_query_file_info,
2871         .set_path_size = smb2_set_path_size,
2872         .set_file_size = smb2_set_file_size,
2873         .set_file_info = smb2_set_file_info,
2874         .set_compression = smb2_set_compression,
2875         .mkdir = smb2_mkdir,
2876         .mkdir_setinfo = smb2_mkdir_setinfo,
2877         .rmdir = smb2_rmdir,
2878         .unlink = smb2_unlink,
2879         .rename = smb2_rename_path,
2880         .create_hardlink = smb2_create_hardlink,
2881         .query_symlink = smb2_query_symlink,
2882         .query_mf_symlink = smb3_query_mf_symlink,
2883         .create_mf_symlink = smb3_create_mf_symlink,
2884         .open = smb2_open_file,
2885         .set_fid = smb2_set_fid,
2886         .close = smb2_close_file,
2887         .flush = smb2_flush_file,
2888         .async_readv = smb2_async_readv,
2889         .async_writev = smb2_async_writev,
2890         .sync_read = smb2_sync_read,
2891         .sync_write = smb2_sync_write,
2892         .query_dir_first = smb2_query_dir_first,
2893         .query_dir_next = smb2_query_dir_next,
2894         .close_dir = smb2_close_dir,
2895         .calc_smb_size = smb2_calc_size,
2896         .is_status_pending = smb2_is_status_pending,
2897         .is_session_expired = smb2_is_session_expired,
2898         .oplock_response = smb2_oplock_response,
2899         .queryfs = smb2_queryfs,
2900         .mand_lock = smb2_mand_lock,
2901         .mand_unlock_range = smb2_unlock_range,
2902         .push_mand_locks = smb2_push_mandatory_locks,
2903         .get_lease_key = smb2_get_lease_key,
2904         .set_lease_key = smb2_set_lease_key,
2905         .new_lease_key = smb2_new_lease_key,
2906         .calc_signature = smb2_calc_signature,
2907         .is_read_op = smb2_is_read_op,
2908         .set_oplock_level = smb2_set_oplock_level,
2909         .create_lease_buf = smb2_create_lease_buf,
2910         .parse_lease_buf = smb2_parse_lease_buf,
2911         .copychunk_range = smb2_copychunk_range,
2912         .wp_retry_size = smb2_wp_retry_size,
2913         .dir_needs_close = smb2_dir_needs_close,
2914         .get_dfs_refer = smb2_get_dfs_refer,
2915         .select_sectype = smb2_select_sectype,
2916 #ifdef CONFIG_CIFS_XATTR
2917         .query_all_EAs = smb2_query_eas,
2918         .set_EA = smb2_set_ea,
2919 #endif /* CIFS_XATTR */
2920 #ifdef CONFIG_CIFS_ACL
2921         .get_acl = get_smb2_acl,
2922         .get_acl_by_fid = get_smb2_acl_by_fid,
2923         .set_acl = set_smb2_acl,
2924 #endif /* CIFS_ACL */
2925         .next_header = smb2_next_header,
2926 };
2927
2928 struct smb_version_operations smb21_operations = {
2929         .compare_fids = smb2_compare_fids,
2930         .setup_request = smb2_setup_request,
2931         .setup_async_request = smb2_setup_async_request,
2932         .check_receive = smb2_check_receive,
2933         .add_credits = smb2_add_credits,
2934         .set_credits = smb2_set_credits,
2935         .get_credits_field = smb2_get_credits_field,
2936         .get_credits = smb2_get_credits,
2937         .wait_mtu_credits = smb2_wait_mtu_credits,
2938         .get_next_mid = smb2_get_next_mid,
2939         .read_data_offset = smb2_read_data_offset,
2940         .read_data_length = smb2_read_data_length,
2941         .map_error = map_smb2_to_linux_error,
2942         .find_mid = smb2_find_mid,
2943         .check_message = smb2_check_message,
2944         .dump_detail = smb2_dump_detail,
2945         .clear_stats = smb2_clear_stats,
2946         .print_stats = smb2_print_stats,
2947         .is_oplock_break = smb2_is_valid_oplock_break,
2948         .handle_cancelled_mid = smb2_handle_cancelled_mid,
2949         .downgrade_oplock = smb2_downgrade_oplock,
2950         .need_neg = smb2_need_neg,
2951         .negotiate = smb2_negotiate,
2952         .negotiate_wsize = smb2_negotiate_wsize,
2953         .negotiate_rsize = smb2_negotiate_rsize,
2954         .sess_setup = SMB2_sess_setup,
2955         .logoff = SMB2_logoff,
2956         .tree_connect = SMB2_tcon,
2957         .tree_disconnect = SMB2_tdis,
2958         .qfs_tcon = smb2_qfs_tcon,
2959         .is_path_accessible = smb2_is_path_accessible,
2960         .can_echo = smb2_can_echo,
2961         .echo = SMB2_echo,
2962         .query_path_info = smb2_query_path_info,
2963         .get_srv_inum = smb2_get_srv_inum,
2964         .query_file_info = smb2_query_file_info,
2965         .set_path_size = smb2_set_path_size,
2966         .set_file_size = smb2_set_file_size,
2967         .set_file_info = smb2_set_file_info,
2968         .set_compression = smb2_set_compression,
2969         .mkdir = smb2_mkdir,
2970         .mkdir_setinfo = smb2_mkdir_setinfo,
2971         .rmdir = smb2_rmdir,
2972         .unlink = smb2_unlink,
2973         .rename = smb2_rename_path,
2974         .create_hardlink = smb2_create_hardlink,
2975         .query_symlink = smb2_query_symlink,
2976         .query_mf_symlink = smb3_query_mf_symlink,
2977         .create_mf_symlink = smb3_create_mf_symlink,
2978         .open = smb2_open_file,
2979         .set_fid = smb2_set_fid,
2980         .close = smb2_close_file,
2981         .flush = smb2_flush_file,
2982         .async_readv = smb2_async_readv,
2983         .async_writev = smb2_async_writev,
2984         .sync_read = smb2_sync_read,
2985         .sync_write = smb2_sync_write,
2986         .query_dir_first = smb2_query_dir_first,
2987         .query_dir_next = smb2_query_dir_next,
2988         .close_dir = smb2_close_dir,
2989         .calc_smb_size = smb2_calc_size,
2990         .is_status_pending = smb2_is_status_pending,
2991         .is_session_expired = smb2_is_session_expired,
2992         .oplock_response = smb2_oplock_response,
2993         .queryfs = smb2_queryfs,
2994         .mand_lock = smb2_mand_lock,
2995         .mand_unlock_range = smb2_unlock_range,
2996         .push_mand_locks = smb2_push_mandatory_locks,
2997         .get_lease_key = smb2_get_lease_key,
2998         .set_lease_key = smb2_set_lease_key,
2999         .new_lease_key = smb2_new_lease_key,
3000         .calc_signature = smb2_calc_signature,
3001         .is_read_op = smb21_is_read_op,
3002         .set_oplock_level = smb21_set_oplock_level,
3003         .create_lease_buf = smb2_create_lease_buf,
3004         .parse_lease_buf = smb2_parse_lease_buf,
3005         .copychunk_range = smb2_copychunk_range,
3006         .wp_retry_size = smb2_wp_retry_size,
3007         .dir_needs_close = smb2_dir_needs_close,
3008         .enum_snapshots = smb3_enum_snapshots,
3009         .get_dfs_refer = smb2_get_dfs_refer,
3010         .select_sectype = smb2_select_sectype,
3011 #ifdef CONFIG_CIFS_XATTR
3012         .query_all_EAs = smb2_query_eas,
3013         .set_EA = smb2_set_ea,
3014 #endif /* CIFS_XATTR */
3015 #ifdef CONFIG_CIFS_ACL
3016         .get_acl = get_smb2_acl,
3017         .get_acl_by_fid = get_smb2_acl_by_fid,
3018         .set_acl = set_smb2_acl,
3019 #endif /* CIFS_ACL */
3020         .next_header = smb2_next_header,
3021 };
3022
3023 struct smb_version_operations smb30_operations = {
3024         .compare_fids = smb2_compare_fids,
3025         .setup_request = smb2_setup_request,
3026         .setup_async_request = smb2_setup_async_request,
3027         .check_receive = smb2_check_receive,
3028         .add_credits = smb2_add_credits,
3029         .set_credits = smb2_set_credits,
3030         .get_credits_field = smb2_get_credits_field,
3031         .get_credits = smb2_get_credits,
3032         .wait_mtu_credits = smb2_wait_mtu_credits,
3033         .get_next_mid = smb2_get_next_mid,
3034         .read_data_offset = smb2_read_data_offset,
3035         .read_data_length = smb2_read_data_length,
3036         .map_error = map_smb2_to_linux_error,
3037         .find_mid = smb2_find_mid,
3038         .check_message = smb2_check_message,
3039         .dump_detail = smb2_dump_detail,
3040         .clear_stats = smb2_clear_stats,
3041         .print_stats = smb2_print_stats,
3042         .dump_share_caps = smb2_dump_share_caps,
3043         .is_oplock_break = smb2_is_valid_oplock_break,
3044         .handle_cancelled_mid = smb2_handle_cancelled_mid,
3045         .downgrade_oplock = smb2_downgrade_oplock,
3046         .need_neg = smb2_need_neg,
3047         .negotiate = smb2_negotiate,
3048         .negotiate_wsize = smb2_negotiate_wsize,
3049         .negotiate_rsize = smb2_negotiate_rsize,
3050         .sess_setup = SMB2_sess_setup,
3051         .logoff = SMB2_logoff,
3052         .tree_connect = SMB2_tcon,
3053         .tree_disconnect = SMB2_tdis,
3054         .qfs_tcon = smb3_qfs_tcon,
3055         .is_path_accessible = smb2_is_path_accessible,
3056         .can_echo = smb2_can_echo,
3057         .echo = SMB2_echo,
3058         .query_path_info = smb2_query_path_info,
3059         .get_srv_inum = smb2_get_srv_inum,
3060         .query_file_info = smb2_query_file_info,
3061         .set_path_size = smb2_set_path_size,
3062         .set_file_size = smb2_set_file_size,
3063         .set_file_info = smb2_set_file_info,
3064         .set_compression = smb2_set_compression,
3065         .mkdir = smb2_mkdir,
3066         .mkdir_setinfo = smb2_mkdir_setinfo,
3067         .rmdir = smb2_rmdir,
3068         .unlink = smb2_unlink,
3069         .rename = smb2_rename_path,
3070         .create_hardlink = smb2_create_hardlink,
3071         .query_symlink = smb2_query_symlink,
3072         .query_mf_symlink = smb3_query_mf_symlink,
3073         .create_mf_symlink = smb3_create_mf_symlink,
3074         .open = smb2_open_file,
3075         .set_fid = smb2_set_fid,
3076         .close = smb2_close_file,
3077         .flush = smb2_flush_file,
3078         .async_readv = smb2_async_readv,
3079         .async_writev = smb2_async_writev,
3080         .sync_read = smb2_sync_read,
3081         .sync_write = smb2_sync_write,
3082         .query_dir_first = smb2_query_dir_first,
3083         .query_dir_next = smb2_query_dir_next,
3084         .close_dir = smb2_close_dir,
3085         .calc_smb_size = smb2_calc_size,
3086         .is_status_pending = smb2_is_status_pending,
3087         .is_session_expired = smb2_is_session_expired,
3088         .oplock_response = smb2_oplock_response,
3089         .queryfs = smb2_queryfs,
3090         .mand_lock = smb2_mand_lock,
3091         .mand_unlock_range = smb2_unlock_range,
3092         .push_mand_locks = smb2_push_mandatory_locks,
3093         .get_lease_key = smb2_get_lease_key,
3094         .set_lease_key = smb2_set_lease_key,
3095         .new_lease_key = smb2_new_lease_key,
3096         .generate_signingkey = generate_smb30signingkey,
3097         .calc_signature = smb3_calc_signature,
3098         .set_integrity  = smb3_set_integrity,
3099         .is_read_op = smb21_is_read_op,
3100         .set_oplock_level = smb3_set_oplock_level,
3101         .create_lease_buf = smb3_create_lease_buf,
3102         .parse_lease_buf = smb3_parse_lease_buf,
3103         .copychunk_range = smb2_copychunk_range,
3104         .duplicate_extents = smb2_duplicate_extents,
3105         .validate_negotiate = smb3_validate_negotiate,
3106         .wp_retry_size = smb2_wp_retry_size,
3107         .dir_needs_close = smb2_dir_needs_close,
3108         .fallocate = smb3_fallocate,
3109         .enum_snapshots = smb3_enum_snapshots,
3110         .init_transform_rq = smb3_init_transform_rq,
3111         .free_transform_rq = smb3_free_transform_rq,
3112         .is_transform_hdr = smb3_is_transform_hdr,
3113         .receive_transform = smb3_receive_transform,
3114         .get_dfs_refer = smb2_get_dfs_refer,
3115         .select_sectype = smb2_select_sectype,
3116 #ifdef CONFIG_CIFS_XATTR
3117         .query_all_EAs = smb2_query_eas,
3118         .set_EA = smb2_set_ea,
3119 #endif /* CIFS_XATTR */
3120 #ifdef CONFIG_CIFS_ACL
3121         .get_acl = get_smb2_acl,
3122         .get_acl_by_fid = get_smb2_acl_by_fid,
3123         .set_acl = set_smb2_acl,
3124 #endif /* CIFS_ACL */
3125         .next_header = smb2_next_header,
3126 };
3127
3128 #ifdef CONFIG_CIFS_SMB311
3129 struct smb_version_operations smb311_operations = {
3130         .compare_fids = smb2_compare_fids,
3131         .setup_request = smb2_setup_request,
3132         .setup_async_request = smb2_setup_async_request,
3133         .check_receive = smb2_check_receive,
3134         .add_credits = smb2_add_credits,
3135         .set_credits = smb2_set_credits,
3136         .get_credits_field = smb2_get_credits_field,
3137         .get_credits = smb2_get_credits,
3138         .wait_mtu_credits = smb2_wait_mtu_credits,
3139         .get_next_mid = smb2_get_next_mid,
3140         .read_data_offset = smb2_read_data_offset,
3141         .read_data_length = smb2_read_data_length,
3142         .map_error = map_smb2_to_linux_error,
3143         .find_mid = smb2_find_mid,
3144         .check_message = smb2_check_message,
3145         .dump_detail = smb2_dump_detail,
3146         .clear_stats = smb2_clear_stats,
3147         .print_stats = smb2_print_stats,
3148         .dump_share_caps = smb2_dump_share_caps,
3149         .is_oplock_break = smb2_is_valid_oplock_break,
3150         .handle_cancelled_mid = smb2_handle_cancelled_mid,
3151         .downgrade_oplock = smb2_downgrade_oplock,
3152         .need_neg = smb2_need_neg,
3153         .negotiate = smb2_negotiate,
3154         .negotiate_wsize = smb2_negotiate_wsize,
3155         .negotiate_rsize = smb2_negotiate_rsize,
3156         .sess_setup = SMB2_sess_setup,
3157         .logoff = SMB2_logoff,
3158         .tree_connect = SMB2_tcon,
3159         .tree_disconnect = SMB2_tdis,
3160         .qfs_tcon = smb3_qfs_tcon,
3161         .is_path_accessible = smb2_is_path_accessible,
3162         .can_echo = smb2_can_echo,
3163         .echo = SMB2_echo,
3164         .query_path_info = smb2_query_path_info,
3165         .get_srv_inum = smb2_get_srv_inum,
3166         .query_file_info = smb2_query_file_info,
3167         .set_path_size = smb2_set_path_size,
3168         .set_file_size = smb2_set_file_size,
3169         .set_file_info = smb2_set_file_info,
3170         .set_compression = smb2_set_compression,
3171         .mkdir = smb2_mkdir,
3172         .mkdir_setinfo = smb2_mkdir_setinfo,
3173         .rmdir = smb2_rmdir,
3174         .unlink = smb2_unlink,
3175         .rename = smb2_rename_path,
3176         .create_hardlink = smb2_create_hardlink,
3177         .query_symlink = smb2_query_symlink,
3178         .query_mf_symlink = smb3_query_mf_symlink,
3179         .create_mf_symlink = smb3_create_mf_symlink,
3180         .open = smb2_open_file,
3181         .set_fid = smb2_set_fid,
3182         .close = smb2_close_file,
3183         .flush = smb2_flush_file,
3184         .async_readv = smb2_async_readv,
3185         .async_writev = smb2_async_writev,
3186         .sync_read = smb2_sync_read,
3187         .sync_write = smb2_sync_write,
3188         .query_dir_first = smb2_query_dir_first,
3189         .query_dir_next = smb2_query_dir_next,
3190         .close_dir = smb2_close_dir,
3191         .calc_smb_size = smb2_calc_size,
3192         .is_status_pending = smb2_is_status_pending,
3193         .is_session_expired = smb2_is_session_expired,
3194         .oplock_response = smb2_oplock_response,
3195         .queryfs = smb2_queryfs,
3196         .mand_lock = smb2_mand_lock,
3197         .mand_unlock_range = smb2_unlock_range,
3198         .push_mand_locks = smb2_push_mandatory_locks,
3199         .get_lease_key = smb2_get_lease_key,
3200         .set_lease_key = smb2_set_lease_key,
3201         .new_lease_key = smb2_new_lease_key,
3202         .generate_signingkey = generate_smb311signingkey,
3203         .calc_signature = smb3_calc_signature,
3204         .set_integrity  = smb3_set_integrity,
3205         .is_read_op = smb21_is_read_op,
3206         .set_oplock_level = smb3_set_oplock_level,
3207         .create_lease_buf = smb3_create_lease_buf,
3208         .parse_lease_buf = smb3_parse_lease_buf,
3209         .copychunk_range = smb2_copychunk_range,
3210         .duplicate_extents = smb2_duplicate_extents,
3211 /*      .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
3212         .wp_retry_size = smb2_wp_retry_size,
3213         .dir_needs_close = smb2_dir_needs_close,
3214         .fallocate = smb3_fallocate,
3215         .enum_snapshots = smb3_enum_snapshots,
3216         .init_transform_rq = smb3_init_transform_rq,
3217         .free_transform_rq = smb3_free_transform_rq,
3218         .is_transform_hdr = smb3_is_transform_hdr,
3219         .receive_transform = smb3_receive_transform,
3220         .get_dfs_refer = smb2_get_dfs_refer,
3221         .select_sectype = smb2_select_sectype,
3222 #ifdef CONFIG_CIFS_XATTR
3223         .query_all_EAs = smb2_query_eas,
3224         .set_EA = smb2_set_ea,
3225 #endif /* CIFS_XATTR */
3226         .next_header = smb2_next_header,
3227 };
3228 #endif /* CIFS_SMB311 */
3229
3230 struct smb_version_values smb20_values = {
3231         .version_string = SMB20_VERSION_STRING,
3232         .protocol_id = SMB20_PROT_ID,
3233         .req_capabilities = 0, /* MBZ */
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 smb21_values = {
3252         .version_string = SMB21_VERSION_STRING,
3253         .protocol_id = SMB21_PROT_ID,
3254         .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
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),
3270 };
3271
3272 struct smb_version_values smb3any_values = {
3273         .version_string = SMB3ANY_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 smbdefault_values = {
3294         .version_string = SMBDEFAULT_VERSION_STRING,
3295         .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
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 smb30_values = {
3315         .version_string = SMB30_VERSION_STRING,
3316         .protocol_id = SMB30_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 struct smb_version_values smb302_values = {
3336         .version_string = SMB302_VERSION_STRING,
3337         .protocol_id = SMB302_PROT_ID,
3338         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
3339         .large_lock_type = 0,
3340         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3341         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3342         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3343         .header_size = sizeof(struct smb2_sync_hdr),
3344         .header_preamble_size = 0,
3345         .max_header_size = MAX_SMB2_HDR_SIZE,
3346         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3347         .lock_cmd = SMB2_LOCK,
3348         .cap_unix = 0,
3349         .cap_nt_find = SMB2_NT_FIND,
3350         .cap_large_files = SMB2_LARGE_FILES,
3351         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3352         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3353         .create_lease_size = sizeof(struct create_lease_v2),
3354 };
3355
3356 #ifdef CONFIG_CIFS_SMB311
3357 struct smb_version_values smb311_values = {
3358         .version_string = SMB311_VERSION_STRING,
3359         .protocol_id = SMB311_PROT_ID,
3360         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
3361         .large_lock_type = 0,
3362         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3363         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3364         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3365         .header_size = sizeof(struct smb2_sync_hdr),
3366         .header_preamble_size = 0,
3367         .max_header_size = MAX_SMB2_HDR_SIZE,
3368         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3369         .lock_cmd = SMB2_LOCK,
3370         .cap_unix = 0,
3371         .cap_nt_find = SMB2_NT_FIND,
3372         .cap_large_files = SMB2_LARGE_FILES,
3373         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3374         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3375         .create_lease_size = sizeof(struct create_lease_v2),
3376 };
3377 #endif /* SMB311 */