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
  78         /* eg found case where write overlapping reconnect messed up credits */
  79         if (((optype & CIFS_OP_MASK) == CIFS_NEG_OP) && (*val != 0))
  80                 trace_smb3_reconnect_with_invalid_credits(server->CurrentMid,
  81                         server->hostname, *val);
  82
  83         *val += add;
  84         if (*val > 65000) {
  85                 *val = 65000; /* Don't get near 64K credits, avoid srv bugs */
  86                 printk_once(KERN_WARNING "server overflowed SMB3 credits\n");
  87         }
  88         server->in_flight--;
  89         if (server->in_flight == 0 && (optype & CIFS_OP_MASK) != CIFS_NEG_OP)
  90                 rc = change_conf(server);
  91         /*
  92          * Sometimes server returns 0 credits on oplock break ack - we need to
  93          * rebalance credits in this case.
  94          */
  95         else if (server->in_flight > 0 && server->oplock_credits == 0 &&
  96                  server->oplocks) {
  97                 if (server->credits > 1) {
  98                         server->credits--;
  99                         server->oplock_credits++;
 100                 }
 101         }
 102         spin_unlock(&server->req_lock);
 103         wake_up(&server->request_q);
 104         if (rc)
 105                 cifs_reconnect(server);
 106 }
 107
 108 static void
 109 smb2_set_credits(struct TCP_Server_Info *server, const int val)
 110 {
 111         spin_lock(&server->req_lock);
 112         server->credits = val;
 113         if (val == 1)
 114                 server->reconnect_instance++;
 115         spin_unlock(&server->req_lock);
 116         /* don't log while holding the lock */
 117         if (val == 1)
 118                 cifs_dbg(FYI, "set credits to 1 due to smb2 reconnect\n");
 119 }
 120
 121 static int *
 122 smb2_get_credits_field(struct TCP_Server_Info *server, const int optype)
 123 {
 124         switch (optype) {
 125         case CIFS_ECHO_OP:
 126                 return &server->echo_credits;
 127         case CIFS_OBREAK_OP:
 128                 return &server->oplock_credits;
 129         default:
 130                 return &server->credits;
 131         }
 132 }
 133
 134 static unsigned int
 135 smb2_get_credits(struct mid_q_entry *mid)
 136 {
 137         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)mid->resp_buf;
 138
 139         return le16_to_cpu(shdr->CreditRequest);
 140 }
 141
 142 static int
 143 smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size,
 144                       unsigned int *num, unsigned int *credits)
 145 {
 146         int rc = 0;
 147         unsigned int scredits;
 148
 149         spin_lock(&server->req_lock);
 150         while (1) {
 151                 if (server->credits <= 0) {
 152                         spin_unlock(&server->req_lock);
 153                         cifs_num_waiters_inc(server);
 154                         rc = wait_event_killable(server->request_q,
 155                                         has_credits(server, &server->credits));
 156                         cifs_num_waiters_dec(server);
 157                         if (rc)
 158                                 return rc;
 159                         spin_lock(&server->req_lock);
 160                 } else {
 161                         if (server->tcpStatus == CifsExiting) {
 162                                 spin_unlock(&server->req_lock);
 163                                 return -ENOENT;
 164                         }
 165
 166                         scredits = server->credits;
 167                         /* can deadlock with reopen */
 168                         if (scredits == 1) {
 169                                 *num = SMB2_MAX_BUFFER_SIZE;
 170                                 *credits = 0;
 171                                 break;
 172                         }
 173
 174                         /* leave one credit for a possible reopen */
 175                         scredits--;
 176                         *num = min_t(unsigned int, size,
 177                                      scredits * SMB2_MAX_BUFFER_SIZE);
 178
 179                         *credits = DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE);
 180                         server->credits -= *credits;
 181                         server->in_flight++;
 182                         break;
 183                 }
 184         }
 185         spin_unlock(&server->req_lock);
 186         return rc;
 187 }
 188
 189 static __u64
 190 smb2_get_next_mid(struct TCP_Server_Info *server)
 191 {
 192         __u64 mid;
 193         /* for SMB2 we need the current value */
 194         spin_lock(&GlobalMid_Lock);
 195         mid = server->CurrentMid++;
 196         spin_unlock(&GlobalMid_Lock);
 197         return mid;
 198 }
 199
 200 static struct mid_q_entry *
 201 smb2_find_mid(struct TCP_Server_Info *server, char *buf)
 202 {
 203         struct mid_q_entry *mid;
 204         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
 205         __u64 wire_mid = le64_to_cpu(shdr->MessageId);
 206
 207         if (shdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {
 208                 cifs_dbg(VFS, "encrypted frame parsing not supported yet");
 209                 return NULL;
 210         }
 211
 212         spin_lock(&GlobalMid_Lock);
 213         list_for_each_entry(mid, &server->pending_mid_q, qhead) {
 214                 if ((mid->mid == wire_mid) &&
 215                     (mid->mid_state == MID_REQUEST_SUBMITTED) &&
 216                     (mid->command == shdr->Command)) {
 217                         kref_get(&mid->refcount);
 218                         spin_unlock(&GlobalMid_Lock);
 219                         return mid;
 220                 }
 221         }
 222         spin_unlock(&GlobalMid_Lock);
 223         return NULL;
 224 }
 225
 226 static void
 227 smb2_dump_detail(void *buf, struct TCP_Server_Info *server)
 228 {
 229 #ifdef CONFIG_CIFS_DEBUG2
 230         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
 231
 232         cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
 233                  shdr->Command, shdr->Status, shdr->Flags, shdr->MessageId,
 234                  shdr->ProcessId);
 235         cifs_dbg(VFS, "smb buf %p len %u\n", buf,
 236                  server->ops->calc_smb_size(buf, server));
 237 #endif
 238 }
 239
 240 static bool
 241 smb2_need_neg(struct TCP_Server_Info *server)
 242 {
 243         return server->max_read == 0;
 244 }
 245
 246 static int
 247 smb2_negotiate(const unsigned int xid, struct cifs_ses *ses)
 248 {
 249         int rc;
 250         ses->server->CurrentMid = 0;
 251         rc = SMB2_negotiate(xid, ses);
 252         /* BB we probably don't need to retry with modern servers */
 253         if (rc == -EAGAIN)
 254                 rc = -EHOSTDOWN;
 255         return rc;
 256 }
 257
 258 static unsigned int
 259 smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 260 {
 261         struct TCP_Server_Info *server = tcon->ses->server;
 262         unsigned int wsize;
 263
 264         /* start with specified wsize, or default */
 265         wsize = volume_info->wsize ? volume_info->wsize : CIFS_DEFAULT_IOSIZE;
 266         wsize = min_t(unsigned int, wsize, server->max_write);
 267 #ifdef CONFIG_CIFS_SMB_DIRECT
 268         if (server->rdma) {
 269                 if (server->sign)
 270                         wsize = min_t(unsigned int,
 271                                 wsize, server->smbd_conn->max_fragmented_send_size);
 272                 else
 273                         wsize = min_t(unsigned int,
 274                                 wsize, server->smbd_conn->max_readwrite_size);
 275         }
 276 #endif
 277         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 278                 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
 279
 280         return wsize;
 281 }
 282
 283 static unsigned int
 284 smb3_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 285 {
 286         struct TCP_Server_Info *server = tcon->ses->server;
 287         unsigned int wsize;
 288
 289         /* start with specified wsize, or default */
 290         wsize = volume_info->wsize ? volume_info->wsize : SMB3_DEFAULT_IOSIZE;
 291         wsize = min_t(unsigned int, wsize, server->max_write);
 292 #ifdef CONFIG_CIFS_SMB_DIRECT
 293         if (server->rdma) {
 294                 if (server->sign)
 295                         wsize = min_t(unsigned int,
 296                                 wsize, server->smbd_conn->max_fragmented_send_size);
 297                 else
 298                         wsize = min_t(unsigned int,
 299                                 wsize, server->smbd_conn->max_readwrite_size);
 300         }
 301 #endif
 302         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 303                 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
 304
 305         return wsize;
 306 }
 307
 308 static unsigned int
 309 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 310 {
 311         struct TCP_Server_Info *server = tcon->ses->server;
 312         unsigned int rsize;
 313
 314         /* start with specified rsize, or default */
 315         rsize = volume_info->rsize ? volume_info->rsize : CIFS_DEFAULT_IOSIZE;
 316         rsize = min_t(unsigned int, rsize, server->max_read);
 317 #ifdef CONFIG_CIFS_SMB_DIRECT
 318         if (server->rdma) {
 319                 if (server->sign)
 320                         rsize = min_t(unsigned int,
 321                                 rsize, server->smbd_conn->max_fragmented_recv_size);
 322                 else
 323                         rsize = min_t(unsigned int,
 324                                 rsize, server->smbd_conn->max_readwrite_size);
 325         }
 326 #endif
 327
 328         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 329                 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
 330
 331         return rsize;
 332 }
 333
 334 static unsigned int
 335 smb3_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 336 {
 337         struct TCP_Server_Info *server = tcon->ses->server;
 338         unsigned int rsize;
 339
 340         /* start with specified rsize, or default */
 341         rsize = volume_info->rsize ? volume_info->rsize : SMB3_DEFAULT_IOSIZE;
 342         rsize = min_t(unsigned int, rsize, server->max_read);
 343 #ifdef CONFIG_CIFS_SMB_DIRECT
 344         if (server->rdma) {
 345                 if (server->sign)
 346                         rsize = min_t(unsigned int,
 347                                 rsize, server->smbd_conn->max_fragmented_recv_size);
 348                 else
 349                         rsize = min_t(unsigned int,
 350                                 rsize, server->smbd_conn->max_readwrite_size);
 351         }
 352 #endif
 353
 354         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 355                 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
 356
 357         return rsize;
 358 }
 359
 360 static int
 361 parse_server_interfaces(struct network_interface_info_ioctl_rsp *buf,
 362                         size_t buf_len,
 363                         struct cifs_server_iface **iface_list,
 364                         size_t *iface_count)
 365 {
 366         struct network_interface_info_ioctl_rsp *p;
 367         struct sockaddr_in *addr4;
 368         struct sockaddr_in6 *addr6;
 369         struct iface_info_ipv4 *p4;
 370         struct iface_info_ipv6 *p6;
 371         struct cifs_server_iface *info;
 372         ssize_t bytes_left;
 373         size_t next = 0;
 374         int nb_iface = 0;
 375         int rc = 0;
 376
 377         *iface_list = NULL;
 378         *iface_count = 0;
 379
 380         /*
 381          * Fist pass: count and sanity check
 382          */
 383
 384         bytes_left = buf_len;
 385         p = buf;
 386         while (bytes_left >= sizeof(*p)) {
 387                 nb_iface++;
 388                 next = le32_to_cpu(p->Next);
 389                 if (!next) {
 390                         bytes_left -= sizeof(*p);
 391                         break;
 392                 }
 393                 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next);
 394                 bytes_left -= next;
 395         }
 396
 397         if (!nb_iface) {
 398                 cifs_dbg(VFS, "%s: malformed interface info\n", __func__);
 399                 rc = -EINVAL;
 400                 goto out;
 401         }
 402
 403         if (bytes_left || p->Next)
 404                 cifs_dbg(VFS, "%s: incomplete interface info\n", __func__);
 405
 406
 407         /*
 408          * Second pass: extract info to internal structure
 409          */
 410
 411         *iface_list = kcalloc(nb_iface, sizeof(**iface_list), GFP_KERNEL);
 412         if (!*iface_list) {
 413                 rc = -ENOMEM;
 414                 goto out;
 415         }
 416
 417         info = *iface_list;
 418         bytes_left = buf_len;
 419         p = buf;
 420         while (bytes_left >= sizeof(*p)) {
 421                 info->speed = le64_to_cpu(p->LinkSpeed);
 422                 info->rdma_capable = le32_to_cpu(p->Capability & RDMA_CAPABLE);
 423                 info->rss_capable = le32_to_cpu(p->Capability & RSS_CAPABLE);
 424
 425                 cifs_dbg(FYI, "%s: adding iface %zu\n", __func__, *iface_count);
 426                 cifs_dbg(FYI, "%s: speed %zu bps\n", __func__, info->speed);
 427                 cifs_dbg(FYI, "%s: capabilities 0x%08x\n", __func__,
 428                          le32_to_cpu(p->Capability));
 429
 430                 switch (p->Family) {
 431                 /*
 432                  * The kernel and wire socket structures have the same
 433                  * layout and use network byte order but make the
 434                  * conversion explicit in case either one changes.
 435                  */
 436                 case INTERNETWORK:
 437                         addr4 = (struct sockaddr_in *)&info->sockaddr;
 438                         p4 = (struct iface_info_ipv4 *)p->Buffer;
 439                         addr4->sin_family = AF_INET;
 440                         memcpy(&addr4->sin_addr, &p4->IPv4Address, 4);
 441
 442                         /* [MS-SMB2] 2.2.32.5.1.1 Clients MUST ignore these */
 443                         addr4->sin_port = cpu_to_be16(CIFS_PORT);
 444
 445                         cifs_dbg(FYI, "%s: ipv4 %pI4\n", __func__,
 446                                  &addr4->sin_addr);
 447                         break;
 448                 case INTERNETWORKV6:
 449                         addr6 = (struct sockaddr_in6 *)&info->sockaddr;
 450                         p6 = (struct iface_info_ipv6 *)p->Buffer;
 451                         addr6->sin6_family = AF_INET6;
 452                         memcpy(&addr6->sin6_addr, &p6->IPv6Address, 16);
 453
 454                         /* [MS-SMB2] 2.2.32.5.1.2 Clients MUST ignore these */
 455                         addr6->sin6_flowinfo = 0;
 456                         addr6->sin6_scope_id = 0;
 457                         addr6->sin6_port = cpu_to_be16(CIFS_PORT);
 458
 459                         cifs_dbg(FYI, "%s: ipv6 %pI6\n", __func__,
 460                                  &addr6->sin6_addr);
 461                         break;
 462                 default:
 463                         cifs_dbg(VFS,
 464                                  "%s: skipping unsupported socket family\n",
 465                                  __func__);
 466                         goto next_iface;
 467                 }
 468
 469                 (*iface_count)++;
 470                 info++;
 471 next_iface:
 472                 next = le32_to_cpu(p->Next);
 473                 if (!next)
 474                         break;
 475                 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next);
 476                 bytes_left -= next;
 477         }
 478
 479         if (!*iface_count) {
 480                 rc = -EINVAL;
 481                 goto out;
 482         }
 483
 484 out:
 485         if (rc) {
 486                 kfree(*iface_list);
 487                 *iface_count = 0;
 488                 *iface_list = NULL;
 489         }
 490         return rc;
 491 }
 492
 493
 494 static int
 495 SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon)
 496 {
 497         int rc;
 498         unsigned int ret_data_len = 0;
 499         struct network_interface_info_ioctl_rsp *out_buf = NULL;
 500         struct cifs_server_iface *iface_list;
 501         size_t iface_count;
 502         struct cifs_ses *ses = tcon->ses;
 503
 504         rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
 505                         FSCTL_QUERY_NETWORK_INTERFACE_INFO, true /* is_fsctl */,
 506                         NULL /* no data input */, 0 /* no data input */,
 507                         (char **)&out_buf, &ret_data_len);
 508         if (rc == -EOPNOTSUPP) {
 509                 cifs_dbg(FYI,
 510                          "server does not support query network interfaces\n");
 511                 goto out;
 512         } else if (rc != 0) {
 513                 cifs_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
 514                 goto out;
 515         }
 516
 517         rc = parse_server_interfaces(out_buf, ret_data_len,
 518                                      &iface_list, &iface_count);
 519         if (rc)
 520                 goto out;
 521
 522         spin_lock(&ses->iface_lock);
 523         kfree(ses->iface_list);
 524         ses->iface_list = iface_list;
 525         ses->iface_count = iface_count;
 526         ses->iface_last_update = jiffies;
 527         spin_unlock(&ses->iface_lock);
 528
 529 out:
 530         kfree(out_buf);
 531         return rc;
 532 }
 533
 534 static void
 535 smb2_close_cached_fid(struct kref *ref)
 536 {
 537         struct cached_fid *cfid = container_of(ref, struct cached_fid,
 538                                                refcount);
 539
 540         if (cfid->is_valid) {
 541                 cifs_dbg(FYI, "clear cached root file handle\n");
 542                 SMB2_close(0, cfid->tcon, cfid->fid->persistent_fid,
 543                            cfid->fid->volatile_fid);
 544                 cfid->is_valid = false;
 545         }
 546 }
 547
 548 void close_shroot(struct cached_fid *cfid)
 549 {
 550         mutex_lock(&cfid->fid_mutex);
 551         kref_put(&cfid->refcount, smb2_close_cached_fid);
 552         mutex_unlock(&cfid->fid_mutex);
 553 }
 554
 555 void
 556 smb2_cached_lease_break(struct work_struct *work)
 557 {
 558         struct cached_fid *cfid = container_of(work,
 559                                 struct cached_fid, lease_break);
 560
 561         close_shroot(cfid);
 562 }
 563
 564 /*
 565  * Open the directory at the root of a share
 566  */
 567 int open_shroot(unsigned int xid, struct cifs_tcon *tcon, struct cifs_fid *pfid)
 568 {
 569         struct cifs_open_parms oparams;
 570         int rc;
 571         __le16 srch_path = 0; /* Null - since an open of top of share */
 572         u8 oplock = SMB2_OPLOCK_LEVEL_II;
 573
 574         mutex_lock(&tcon->crfid.fid_mutex);
 575         if (tcon->crfid.is_valid) {
 576                 cifs_dbg(FYI, "found a cached root file handle\n");
 577                 memcpy(pfid, tcon->crfid.fid, sizeof(struct cifs_fid));
 578                 kref_get(&tcon->crfid.refcount);
 579                 mutex_unlock(&tcon->crfid.fid_mutex);
 580                 return 0;
 581         }
 582
 583         oparams.tcon = tcon;
 584         oparams.create_options = 0;
 585         oparams.desired_access = FILE_READ_ATTRIBUTES;
 586         oparams.disposition = FILE_OPEN;
 587         oparams.fid = pfid;
 588         oparams.reconnect = false;
 589
 590         rc = SMB2_open(xid, &oparams, &srch_path, &oplock, NULL, NULL, NULL);
 591         if (rc == 0) {
 592                 memcpy(tcon->crfid.fid, pfid, sizeof(struct cifs_fid));
 593                 tcon->crfid.tcon = tcon;
 594                 tcon->crfid.is_valid = true;
 595                 kref_init(&tcon->crfid.refcount);
 596                 kref_get(&tcon->crfid.refcount);
 597         }
 598         mutex_unlock(&tcon->crfid.fid_mutex);
 599         return rc;
 600 }
 601
 602 static void
 603 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
 604 {
 605         int rc;
 606         __le16 srch_path = 0; /* Null - open root of share */
 607         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 608         struct cifs_open_parms oparms;
 609         struct cifs_fid fid;
 610         bool no_cached_open = tcon->nohandlecache;
 611
 612         oparms.tcon = tcon;
 613         oparms.desired_access = FILE_READ_ATTRIBUTES;
 614         oparms.disposition = FILE_OPEN;
 615         oparms.create_options = 0;
 616         oparms.fid = &fid;
 617         oparms.reconnect = false;
 618
 619         if (no_cached_open)
 620                 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
 621                                NULL);
 622         else
 623                 rc = open_shroot(xid, tcon, &fid);
 624
 625         if (rc)
 626                 return;
 627
 628         SMB3_request_interfaces(xid, tcon);
 629
 630         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 631                         FS_ATTRIBUTE_INFORMATION);
 632         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 633                         FS_DEVICE_INFORMATION);
 634         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 635                         FS_VOLUME_INFORMATION);
 636         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 637                         FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
 638         if (no_cached_open)
 639                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 640         else
 641                 close_shroot(&tcon->crfid);
 642
 643         return;
 644 }
 645
 646 static void
 647 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
 648 {
 649         int rc;
 650         __le16 srch_path = 0; /* Null - open root of share */
 651         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 652         struct cifs_open_parms oparms;
 653         struct cifs_fid fid;
 654
 655         oparms.tcon = tcon;
 656         oparms.desired_access = FILE_READ_ATTRIBUTES;
 657         oparms.disposition = FILE_OPEN;
 658         oparms.create_options = 0;
 659         oparms.fid = &fid;
 660         oparms.reconnect = false;
 661
 662         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, NULL);
 663         if (rc)
 664                 return;
 665
 666         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 667                         FS_ATTRIBUTE_INFORMATION);
 668         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 669                         FS_DEVICE_INFORMATION);
 670         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 671         return;
 672 }
 673
 674 static int
 675 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
 676                         struct cifs_sb_info *cifs_sb, const char *full_path)
 677 {
 678         int rc;
 679         __le16 *utf16_path;
 680         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 681         struct cifs_open_parms oparms;
 682         struct cifs_fid fid;
 683
 684         if ((*full_path == 0) && tcon->crfid.is_valid)
 685                 return 0;
 686
 687         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
 688         if (!utf16_path)
 689                 return -ENOMEM;
 690
 691         oparms.tcon = tcon;
 692         oparms.desired_access = FILE_READ_ATTRIBUTES;
 693         oparms.disposition = FILE_OPEN;
 694         if (backup_cred(cifs_sb))
 695                 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
 696         else
 697                 oparms.create_options = 0;
 698         oparms.fid = &fid;
 699         oparms.reconnect = false;
 700
 701         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
 702         if (rc) {
 703                 kfree(utf16_path);
 704                 return rc;
 705         }
 706
 707         rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 708         kfree(utf16_path);
 709         return rc;
 710 }
 711
 712 static int
 713 smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
 714                   struct cifs_sb_info *cifs_sb, const char *full_path,
 715                   u64 *uniqueid, FILE_ALL_INFO *data)
 716 {
 717         *uniqueid = le64_to_cpu(data->IndexNumber);
 718         return 0;
 719 }
 720
 721 static int
 722 smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
 723                      struct cifs_fid *fid, FILE_ALL_INFO *data)
 724 {
 725         int rc;
 726         struct smb2_file_all_info *smb2_data;
 727
 728         smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
 729                             GFP_KERNEL);
 730         if (smb2_data == NULL)
 731                 return -ENOMEM;
 732
 733         rc = SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid,
 734                              smb2_data);
 735         if (!rc)
 736                 move_smb2_info_to_cifs(data, smb2_data);
 737         kfree(smb2_data);
 738         return rc;
 739 }
 740
 741 #ifdef CONFIG_CIFS_XATTR
 742 static ssize_t
 743 move_smb2_ea_to_cifs(char *dst, size_t dst_size,
 744                      struct smb2_file_full_ea_info *src, size_t src_size,
 745                      const unsigned char *ea_name)
 746 {
 747         int rc = 0;
 748         unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0;
 749         char *name, *value;
 750         size_t buf_size = dst_size;
 751         size_t name_len, value_len, user_name_len;
 752
 753         while (src_size > 0) {
 754                 name = &src->ea_data[0];
 755                 name_len = (size_t)src->ea_name_length;
 756                 value = &src->ea_data[src->ea_name_length + 1];
 757                 value_len = (size_t)le16_to_cpu(src->ea_value_length);
 758
 759                 if (name_len == 0) {
 760                         break;
 761                 }
 762
 763                 if (src_size < 8 + name_len + 1 + value_len) {
 764                         cifs_dbg(FYI, "EA entry goes beyond length of list\n");
 765                         rc = -EIO;
 766                         goto out;
 767                 }
 768
 769                 if (ea_name) {
 770                         if (ea_name_len == name_len &&
 771                             memcmp(ea_name, name, name_len) == 0) {
 772                                 rc = value_len;
 773                                 if (dst_size == 0)
 774                                         goto out;
 775                                 if (dst_size < value_len) {
 776                                         rc = -ERANGE;
 777                                         goto out;
 778                                 }
 779                                 memcpy(dst, value, value_len);
 780                                 goto out;
 781                         }
 782                 } else {
 783                         /* 'user.' plus a terminating null */
 784                         user_name_len = 5 + 1 + name_len;
 785
 786                         if (buf_size == 0) {
 787                                 /* skip copy - calc size only */
 788                                 rc += user_name_len;
 789                         } else if (dst_size >= user_name_len) {
 790                                 dst_size -= user_name_len;
 791                                 memcpy(dst, "user.", 5);
 792                                 dst += 5;
 793                                 memcpy(dst, src->ea_data, name_len);
 794                                 dst += name_len;
 795                                 *dst = 0;
 796                                 ++dst;
 797                                 rc += user_name_len;
 798                         } else {
 799                                 /* stop before overrun buffer */
 800                                 rc = -ERANGE;
 801                                 break;
 802                         }
 803                 }
 804
 805                 if (!src->next_entry_offset)
 806                         break;
 807
 808                 if (src_size < le32_to_cpu(src->next_entry_offset)) {
 809                         /* stop before overrun buffer */
 810                         rc = -ERANGE;
 811                         break;
 812                 }
 813                 src_size -= le32_to_cpu(src->next_entry_offset);
 814                 src = (void *)((char *)src +
 815                                le32_to_cpu(src->next_entry_offset));
 816         }
 817
 818         /* didn't find the named attribute */
 819         if (ea_name)
 820                 rc = -ENODATA;
 821
 822 out:
 823         return (ssize_t)rc;
 824 }
 825
 826 static ssize_t
 827 smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon,
 828                const unsigned char *path, const unsigned char *ea_name,
 829                char *ea_data, size_t buf_size,
 830                struct cifs_sb_info *cifs_sb)
 831 {
 832         int rc;
 833         __le16 *utf16_path;
 834         struct kvec rsp_iov = {NULL, 0};
 835         int buftype = CIFS_NO_BUFFER;
 836         struct smb2_query_info_rsp *rsp;
 837         struct smb2_file_full_ea_info *info = NULL;
 838
 839         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
 840         if (!utf16_path)
 841                 return -ENOMEM;
 842
 843         rc = smb2_query_info_compound(xid, tcon, utf16_path,
 844                                       FILE_READ_EA,
 845                                       FILE_FULL_EA_INFORMATION,
 846                                       SMB2_O_INFO_FILE,
 847                                       SMB2_MAX_EA_BUF,
 848                                       &rsp_iov, &buftype, cifs_sb);
 849         if (rc) {
 850                 /*
 851                  * If ea_name is NULL (listxattr) and there are no EAs,
 852                  * return 0 as it's not an error. Otherwise, the specified
 853                  * ea_name was not found.
 854                  */
 855                 if (!ea_name && rc == -ENODATA)
 856                         rc = 0;
 857                 goto qeas_exit;
 858         }
 859
 860         rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
 861         rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
 862                                le32_to_cpu(rsp->OutputBufferLength),
 863                                &rsp_iov,
 864                                sizeof(struct smb2_file_full_ea_info));
 865         if (rc)
 866                 goto qeas_exit;
 867
 868         info = (struct smb2_file_full_ea_info *)(
 869                         le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
 870         rc = move_smb2_ea_to_cifs(ea_data, buf_size, info,
 871                         le32_to_cpu(rsp->OutputBufferLength), ea_name);
 872
 873  qeas_exit:
 874         kfree(utf16_path);
 875         free_rsp_buf(buftype, rsp_iov.iov_base);
 876         return rc;
 877 }
 878
 879
 880 static int
 881 smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
 882             const char *path, const char *ea_name, const void *ea_value,
 883             const __u16 ea_value_len, const struct nls_table *nls_codepage,
 884             struct cifs_sb_info *cifs_sb)
 885 {
 886         struct cifs_ses *ses = tcon->ses;
 887         __le16 *utf16_path = NULL;
 888         int ea_name_len = strlen(ea_name);
 889         int flags = 0;
 890         int len;
 891         struct smb_rqst rqst[3];
 892         int resp_buftype[3];
 893         struct kvec rsp_iov[3];
 894         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
 895         struct cifs_open_parms oparms;
 896         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 897         struct cifs_fid fid;
 898         struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE];
 899         unsigned int size[1];
 900         void *data[1];
 901         struct smb2_file_full_ea_info *ea = NULL;
 902         struct kvec close_iov[1];
 903         int rc;
 904
 905         if (smb3_encryption_required(tcon))
 906                 flags |= CIFS_TRANSFORM_REQ;
 907
 908         if (ea_name_len > 255)
 909                 return -EINVAL;
 910
 911         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
 912         if (!utf16_path)
 913                 return -ENOMEM;
 914
 915         memset(rqst, 0, sizeof(rqst));
 916         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
 917         memset(rsp_iov, 0, sizeof(rsp_iov));
 918
 919         /* Open */
 920         memset(&open_iov, 0, sizeof(open_iov));
 921         rqst[0].rq_iov = open_iov;
 922         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
 923
 924         memset(&oparms, 0, sizeof(oparms));
 925         oparms.tcon = tcon;
 926         oparms.desired_access = FILE_WRITE_EA;
 927         oparms.disposition = FILE_OPEN;
 928         if (backup_cred(cifs_sb))
 929                 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
 930         else
 931                 oparms.create_options = 0;
 932         oparms.fid = &fid;
 933         oparms.reconnect = false;
 934
 935         rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, utf16_path);
 936         if (rc)
 937                 goto sea_exit;
 938         smb2_set_next_command(tcon, &rqst[0]);
 939
 940
 941         /* Set Info */
 942         memset(&si_iov, 0, sizeof(si_iov));
 943         rqst[1].rq_iov = si_iov;
 944         rqst[1].rq_nvec = 1;
 945
 946         len = sizeof(ea) + ea_name_len + ea_value_len + 1;
 947         ea = kzalloc(len, GFP_KERNEL);
 948         if (ea == NULL) {
 949                 rc = -ENOMEM;
 950                 goto sea_exit;
 951         }
 952
 953         ea->ea_name_length = ea_name_len;
 954         ea->ea_value_length = cpu_to_le16(ea_value_len);
 955         memcpy(ea->ea_data, ea_name, ea_name_len + 1);
 956         memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len);
 957
 958         size[0] = len;
 959         data[0] = ea;
 960
 961         rc = SMB2_set_info_init(tcon, &rqst[1], COMPOUND_FID,
 962                                 COMPOUND_FID, current->tgid,
 963                                 FILE_FULL_EA_INFORMATION,
 964                                 SMB2_O_INFO_FILE, 0, data, size);
 965         smb2_set_next_command(tcon, &rqst[1]);
 966         smb2_set_related(&rqst[1]);
 967
 968
 969         /* Close */
 970         memset(&close_iov, 0, sizeof(close_iov));
 971         rqst[2].rq_iov = close_iov;
 972         rqst[2].rq_nvec = 1;
 973         rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID);
 974         smb2_set_related(&rqst[2]);
 975
 976         rc = compound_send_recv(xid, ses, flags, 3, rqst,
 977                                 resp_buftype, rsp_iov);
 978
 979  sea_exit:
 980         kfree(ea);
 981         kfree(utf16_path);
 982         SMB2_open_free(&rqst[0]);
 983         SMB2_set_info_free(&rqst[1]);
 984         SMB2_close_free(&rqst[2]);
 985         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
 986         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
 987         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
 988         return rc;
 989 }
 990 #endif
 991
 992 static bool
 993 smb2_can_echo(struct TCP_Server_Info *server)
 994 {
 995         return server->echoes;
 996 }
 997
 998 static void
 999 smb2_clear_stats(struct cifs_tcon *tcon)
1000 {
1001         int i;
1002         for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
1003                 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
1004                 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
1005         }
1006 }
1007
1008 static void
1009 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
1010 {
1011         seq_puts(m, "\n\tShare Capabilities:");
1012         if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
1013                 seq_puts(m, " DFS,");
1014         if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
1015                 seq_puts(m, " CONTINUOUS AVAILABILITY,");
1016         if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
1017                 seq_puts(m, " SCALEOUT,");
1018         if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
1019                 seq_puts(m, " CLUSTER,");
1020         if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
1021                 seq_puts(m, " ASYMMETRIC,");
1022         if (tcon->capabilities == 0)
1023                 seq_puts(m, " None");
1024         if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
1025                 seq_puts(m, " Aligned,");
1026         if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
1027                 seq_puts(m, " Partition Aligned,");
1028         if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
1029                 seq_puts(m, " SSD,");
1030         if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
1031                 seq_puts(m, " TRIM-support,");
1032
1033         seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
1034         seq_printf(m, "\n\ttid: 0x%x", tcon->tid);
1035         if (tcon->perf_sector_size)
1036                 seq_printf(m, "\tOptimal sector size: 0x%x",
1037                            tcon->perf_sector_size);
1038         seq_printf(m, "\tMaximal Access: 0x%x", tcon->maximal_access);
1039 }
1040
1041 static void
1042 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
1043 {
1044         atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
1045         atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
1046
1047         /*
1048          *  Can't display SMB2_NEGOTIATE, SESSION_SETUP, LOGOFF, CANCEL and ECHO
1049          *  totals (requests sent) since those SMBs are per-session not per tcon
1050          */
1051         seq_printf(m, "\nBytes read: %llu  Bytes written: %llu",
1052                    (long long)(tcon->bytes_read),
1053                    (long long)(tcon->bytes_written));
1054         seq_printf(m, "\nOpen files: %d total (local), %d open on server",
1055                    atomic_read(&tcon->num_local_opens),
1056                    atomic_read(&tcon->num_remote_opens));
1057         seq_printf(m, "\nTreeConnects: %d total %d failed",
1058                    atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
1059                    atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
1060         seq_printf(m, "\nTreeDisconnects: %d total %d failed",
1061                    atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
1062                    atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
1063         seq_printf(m, "\nCreates: %d total %d failed",
1064                    atomic_read(&sent[SMB2_CREATE_HE]),
1065                    atomic_read(&failed[SMB2_CREATE_HE]));
1066         seq_printf(m, "\nCloses: %d total %d failed",
1067                    atomic_read(&sent[SMB2_CLOSE_HE]),
1068                    atomic_read(&failed[SMB2_CLOSE_HE]));
1069         seq_printf(m, "\nFlushes: %d total %d failed",
1070                    atomic_read(&sent[SMB2_FLUSH_HE]),
1071                    atomic_read(&failed[SMB2_FLUSH_HE]));
1072         seq_printf(m, "\nReads: %d total %d failed",
1073                    atomic_read(&sent[SMB2_READ_HE]),
1074                    atomic_read(&failed[SMB2_READ_HE]));
1075         seq_printf(m, "\nWrites: %d total %d failed",
1076                    atomic_read(&sent[SMB2_WRITE_HE]),
1077                    atomic_read(&failed[SMB2_WRITE_HE]));
1078         seq_printf(m, "\nLocks: %d total %d failed",
1079                    atomic_read(&sent[SMB2_LOCK_HE]),
1080                    atomic_read(&failed[SMB2_LOCK_HE]));
1081         seq_printf(m, "\nIOCTLs: %d total %d failed",
1082                    atomic_read(&sent[SMB2_IOCTL_HE]),
1083                    atomic_read(&failed[SMB2_IOCTL_HE]));
1084         seq_printf(m, "\nQueryDirectories: %d total %d failed",
1085                    atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
1086                    atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
1087         seq_printf(m, "\nChangeNotifies: %d total %d failed",
1088                    atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
1089                    atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
1090         seq_printf(m, "\nQueryInfos: %d total %d failed",
1091                    atomic_read(&sent[SMB2_QUERY_INFO_HE]),
1092                    atomic_read(&failed[SMB2_QUERY_INFO_HE]));
1093         seq_printf(m, "\nSetInfos: %d total %d failed",
1094                    atomic_read(&sent[SMB2_SET_INFO_HE]),
1095                    atomic_read(&failed[SMB2_SET_INFO_HE]));
1096         seq_printf(m, "\nOplockBreaks: %d sent %d failed",
1097                    atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
1098                    atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
1099 }
1100
1101 static void
1102 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
1103 {
1104         struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
1105         struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
1106
1107         cfile->fid.persistent_fid = fid->persistent_fid;
1108         cfile->fid.volatile_fid = fid->volatile_fid;
1109 #ifdef CONFIG_CIFS_DEBUG2
1110         cfile->fid.mid = fid->mid;
1111 #endif /* CIFS_DEBUG2 */
1112         server->ops->set_oplock_level(cinode, oplock, fid->epoch,
1113                                       &fid->purge_cache);
1114         cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
1115         memcpy(cfile->fid.create_guid, fid->create_guid, 16);
1116 }
1117
1118 static void
1119 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
1120                 struct cifs_fid *fid)
1121 {
1122         SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1123 }
1124
1125 static int
1126 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
1127                      u64 persistent_fid, u64 volatile_fid,
1128                      struct copychunk_ioctl *pcchunk)
1129 {
1130         int rc;
1131         unsigned int ret_data_len;
1132         struct resume_key_req *res_key;
1133
1134         rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
1135                         FSCTL_SRV_REQUEST_RESUME_KEY, true /* is_fsctl */,
1136                         NULL, 0 /* no input */,
1137                         (char **)&res_key, &ret_data_len);
1138
1139         if (rc) {
1140                 cifs_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
1141                 goto req_res_key_exit;
1142         }
1143         if (ret_data_len < sizeof(struct resume_key_req)) {
1144                 cifs_dbg(VFS, "Invalid refcopy resume key length\n");
1145                 rc = -EINVAL;
1146                 goto req_res_key_exit;
1147         }
1148         memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
1149
1150 req_res_key_exit:
1151         kfree(res_key);
1152         return rc;
1153 }
1154
1155 static int
1156 smb2_ioctl_query_info(const unsigned int xid,
1157                       struct cifs_tcon *tcon,
1158                       __le16 *path, int is_dir,
1159                       unsigned long p)
1160 {
1161         struct cifs_ses *ses = tcon->ses;
1162         char __user *arg = (char __user *)p;
1163         struct smb_query_info qi;
1164         struct smb_query_info __user *pqi;
1165         int rc = 0;
1166         int flags = 0;
1167         struct smb2_query_info_rsp *rsp = NULL;
1168         void *buffer = NULL;
1169         struct smb_rqst rqst[3];
1170         int resp_buftype[3];
1171         struct kvec rsp_iov[3];
1172         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
1173         struct cifs_open_parms oparms;
1174         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1175         struct cifs_fid fid;
1176         struct kvec qi_iov[1];
1177         struct kvec close_iov[1];
1178
1179         memset(rqst, 0, sizeof(rqst));
1180         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1181         memset(rsp_iov, 0, sizeof(rsp_iov));
1182
1183         if (copy_from_user(&qi, arg, sizeof(struct smb_query_info)))
1184                 return -EFAULT;
1185
1186         if (qi.output_buffer_length > 1024)
1187                 return -EINVAL;
1188
1189         if (!ses || !(ses->server))
1190                 return -EIO;
1191
1192         if (smb3_encryption_required(tcon))
1193                 flags |= CIFS_TRANSFORM_REQ;
1194
1195         buffer = kmalloc(qi.output_buffer_length, GFP_KERNEL);
1196         if (buffer == NULL)
1197                 return -ENOMEM;
1198
1199         if (copy_from_user(buffer, arg + sizeof(struct smb_query_info),
1200                            qi.output_buffer_length)) {
1201                 rc = -EFAULT;
1202                 goto iqinf_exit;
1203         }
1204
1205         /* Open */
1206         memset(&open_iov, 0, sizeof(open_iov));
1207         rqst[0].rq_iov = open_iov;
1208         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1209
1210         memset(&oparms, 0, sizeof(oparms));
1211         oparms.tcon = tcon;
1212         oparms.desired_access = FILE_READ_ATTRIBUTES | READ_CONTROL;
1213         oparms.disposition = FILE_OPEN;
1214         if (is_dir)
1215                 oparms.create_options = CREATE_NOT_FILE;
1216         else
1217                 oparms.create_options = CREATE_NOT_DIR;
1218         oparms.fid = &fid;
1219         oparms.reconnect = false;
1220
1221         rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, path);
1222         if (rc)
1223                 goto iqinf_exit;
1224         smb2_set_next_command(tcon, &rqst[0]);
1225
1226         /* Query */
1227         memset(&qi_iov, 0, sizeof(qi_iov));
1228         rqst[1].rq_iov = qi_iov;
1229         rqst[1].rq_nvec = 1;
1230
1231         rc = SMB2_query_info_init(tcon, &rqst[1], COMPOUND_FID, COMPOUND_FID,
1232                                   qi.file_info_class, qi.info_type,
1233                                   qi.additional_information,
1234                                   qi.input_buffer_length,
1235                                   qi.output_buffer_length, buffer);
1236         if (rc)
1237                 goto iqinf_exit;
1238         smb2_set_next_command(tcon, &rqst[1]);
1239         smb2_set_related(&rqst[1]);
1240
1241         /* Close */
1242         memset(&close_iov, 0, sizeof(close_iov));
1243         rqst[2].rq_iov = close_iov;
1244         rqst[2].rq_nvec = 1;
1245
1246         rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID);
1247         if (rc)
1248                 goto iqinf_exit;
1249         smb2_set_related(&rqst[2]);
1250
1251         rc = compound_send_recv(xid, ses, flags, 3, rqst,
1252                                 resp_buftype, rsp_iov);
1253         if (rc)
1254                 goto iqinf_exit;
1255         pqi = (struct smb_query_info __user *)arg;
1256         rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
1257         if (le32_to_cpu(rsp->OutputBufferLength) < qi.input_buffer_length)
1258                 qi.input_buffer_length = le32_to_cpu(rsp->OutputBufferLength);
1259         if (copy_to_user(&pqi->input_buffer_length, &qi.input_buffer_length,
1260                          sizeof(qi.input_buffer_length))) {
1261                 rc = -EFAULT;
1262                 goto iqinf_exit;
1263         }
1264         if (copy_to_user(pqi + 1, rsp->Buffer, qi.input_buffer_length)) {
1265                 rc = -EFAULT;
1266                 goto iqinf_exit;
1267         }
1268
1269  iqinf_exit:
1270         kfree(buffer);
1271         SMB2_open_free(&rqst[0]);
1272         SMB2_query_info_free(&rqst[1]);
1273         SMB2_close_free(&rqst[2]);
1274         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1275         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1276         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1277         return rc;
1278 }
1279
1280 static ssize_t
1281 smb2_copychunk_range(const unsigned int xid,
1282                         struct cifsFileInfo *srcfile,
1283                         struct cifsFileInfo *trgtfile, u64 src_off,
1284                         u64 len, u64 dest_off)
1285 {
1286         int rc;
1287         unsigned int ret_data_len;
1288         struct copychunk_ioctl *pcchunk;
1289         struct copychunk_ioctl_rsp *retbuf = NULL;
1290         struct cifs_tcon *tcon;
1291         int chunks_copied = 0;
1292         bool chunk_sizes_updated = false;
1293         ssize_t bytes_written, total_bytes_written = 0;
1294
1295         pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
1296
1297         if (pcchunk == NULL)
1298                 return -ENOMEM;
1299
1300         cifs_dbg(FYI, "in smb2_copychunk_range - about to call request res key\n");
1301         /* Request a key from the server to identify the source of the copy */
1302         rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
1303                                 srcfile->fid.persistent_fid,
1304                                 srcfile->fid.volatile_fid, pcchunk);
1305
1306         /* Note: request_res_key sets res_key null only if rc !=0 */
1307         if (rc)
1308                 goto cchunk_out;
1309
1310         /* For now array only one chunk long, will make more flexible later */
1311         pcchunk->ChunkCount = cpu_to_le32(1);
1312         pcchunk->Reserved = 0;
1313         pcchunk->Reserved2 = 0;
1314
1315         tcon = tlink_tcon(trgtfile->tlink);
1316
1317         while (len > 0) {
1318                 pcchunk->SourceOffset = cpu_to_le64(src_off);
1319                 pcchunk->TargetOffset = cpu_to_le64(dest_off);
1320                 pcchunk->Length =
1321                         cpu_to_le32(min_t(u32, len, tcon->max_bytes_chunk));
1322
1323                 /* Request server copy to target from src identified by key */
1324                 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1325                         trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
1326                         true /* is_fsctl */, (char *)pcchunk,
1327                         sizeof(struct copychunk_ioctl), (char **)&retbuf,
1328                         &ret_data_len);
1329                 if (rc == 0) {
1330                         if (ret_data_len !=
1331                                         sizeof(struct copychunk_ioctl_rsp)) {
1332                                 cifs_dbg(VFS, "invalid cchunk response size\n");
1333                                 rc = -EIO;
1334                                 goto cchunk_out;
1335                         }
1336                         if (retbuf->TotalBytesWritten == 0) {
1337                                 cifs_dbg(FYI, "no bytes copied\n");
1338                                 rc = -EIO;
1339                                 goto cchunk_out;
1340                         }
1341                         /*
1342                          * Check if server claimed to write more than we asked
1343                          */
1344                         if (le32_to_cpu(retbuf->TotalBytesWritten) >
1345                             le32_to_cpu(pcchunk->Length)) {
1346                                 cifs_dbg(VFS, "invalid copy chunk response\n");
1347                                 rc = -EIO;
1348                                 goto cchunk_out;
1349                         }
1350                         if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
1351                                 cifs_dbg(VFS, "invalid num chunks written\n");
1352                                 rc = -EIO;
1353                                 goto cchunk_out;
1354                         }
1355                         chunks_copied++;
1356
1357                         bytes_written = le32_to_cpu(retbuf->TotalBytesWritten);
1358                         src_off += bytes_written;
1359                         dest_off += bytes_written;
1360                         len -= bytes_written;
1361                         total_bytes_written += bytes_written;
1362
1363                         cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n",
1364                                 le32_to_cpu(retbuf->ChunksWritten),
1365                                 le32_to_cpu(retbuf->ChunkBytesWritten),
1366                                 bytes_written);
1367                 } else if (rc == -EINVAL) {
1368                         if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
1369                                 goto cchunk_out;
1370
1371                         cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
1372                                 le32_to_cpu(retbuf->ChunksWritten),
1373                                 le32_to_cpu(retbuf->ChunkBytesWritten),
1374                                 le32_to_cpu(retbuf->TotalBytesWritten));
1375
1376                         /*
1377                          * Check if this is the first request using these sizes,
1378                          * (ie check if copy succeed once with original sizes
1379                          * and check if the server gave us different sizes after
1380                          * we already updated max sizes on previous request).
1381                          * if not then why is the server returning an error now
1382                          */
1383                         if ((chunks_copied != 0) || chunk_sizes_updated)
1384                                 goto cchunk_out;
1385
1386                         /* Check that server is not asking us to grow size */
1387                         if (le32_to_cpu(retbuf->ChunkBytesWritten) <
1388                                         tcon->max_bytes_chunk)
1389                                 tcon->max_bytes_chunk =
1390                                         le32_to_cpu(retbuf->ChunkBytesWritten);
1391                         else
1392                                 goto cchunk_out; /* server gave us bogus size */
1393
1394                         /* No need to change MaxChunks since already set to 1 */
1395                         chunk_sizes_updated = true;
1396                 } else
1397                         goto cchunk_out;
1398         }
1399
1400 cchunk_out:
1401         kfree(pcchunk);
1402         kfree(retbuf);
1403         if (rc)
1404                 return rc;
1405         else
1406                 return total_bytes_written;
1407 }
1408
1409 static int
1410 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
1411                 struct cifs_fid *fid)
1412 {
1413         return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1414 }
1415
1416 static unsigned int
1417 smb2_read_data_offset(char *buf)
1418 {
1419         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1420         return rsp->DataOffset;
1421 }
1422
1423 static unsigned int
1424 smb2_read_data_length(char *buf, bool in_remaining)
1425 {
1426         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1427
1428         if (in_remaining)
1429                 return le32_to_cpu(rsp->DataRemaining);
1430
1431         return le32_to_cpu(rsp->DataLength);
1432 }
1433
1434
1435 static int
1436 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,
1437                struct cifs_io_parms *parms, unsigned int *bytes_read,
1438                char **buf, int *buf_type)
1439 {
1440         parms->persistent_fid = pfid->persistent_fid;
1441         parms->volatile_fid = pfid->volatile_fid;
1442         return SMB2_read(xid, parms, bytes_read, buf, buf_type);
1443 }
1444
1445 static int
1446 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,
1447                 struct cifs_io_parms *parms, unsigned int *written,
1448                 struct kvec *iov, unsigned long nr_segs)
1449 {
1450
1451         parms->persistent_fid = pfid->persistent_fid;
1452         parms->volatile_fid = pfid->volatile_fid;
1453         return SMB2_write(xid, parms, written, iov, nr_segs);
1454 }
1455
1456 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
1457 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
1458                 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
1459 {
1460         struct cifsInodeInfo *cifsi;
1461         int rc;
1462
1463         cifsi = CIFS_I(inode);
1464
1465         /* if file already sparse don't bother setting sparse again */
1466         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
1467                 return true; /* already sparse */
1468
1469         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
1470                 return true; /* already not sparse */
1471
1472         /*
1473          * Can't check for sparse support on share the usual way via the
1474          * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
1475          * since Samba server doesn't set the flag on the share, yet
1476          * supports the set sparse FSCTL and returns sparse correctly
1477          * in the file attributes. If we fail setting sparse though we
1478          * mark that server does not support sparse files for this share
1479          * to avoid repeatedly sending the unsupported fsctl to server
1480          * if the file is repeatedly extended.
1481          */
1482         if (tcon->broken_sparse_sup)
1483                 return false;
1484
1485         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1486                         cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
1487                         true /* is_fctl */,
1488                         &setsparse, 1, NULL, NULL);
1489         if (rc) {
1490                 tcon->broken_sparse_sup = true;
1491                 cifs_dbg(FYI, "set sparse rc = %d\n", rc);
1492                 return false;
1493         }
1494
1495         if (setsparse)
1496                 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
1497         else
1498                 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
1499
1500         return true;
1501 }
1502
1503 static int
1504 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
1505                    struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
1506 {
1507         __le64 eof = cpu_to_le64(size);
1508         struct inode *inode;
1509
1510         /*
1511          * If extending file more than one page make sparse. Many Linux fs
1512          * make files sparse by default when extending via ftruncate
1513          */
1514         inode = d_inode(cfile->dentry);
1515
1516         if (!set_alloc && (size > inode->i_size + 8192)) {
1517                 __u8 set_sparse = 1;
1518
1519                 /* whether set sparse succeeds or not, extend the file */
1520                 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
1521         }
1522
1523         return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
1524                             cfile->fid.volatile_fid, cfile->pid, &eof);
1525 }
1526
1527 static int
1528 smb2_duplicate_extents(const unsigned int xid,
1529                         struct cifsFileInfo *srcfile,
1530                         struct cifsFileInfo *trgtfile, u64 src_off,
1531                         u64 len, u64 dest_off)
1532 {
1533         int rc;
1534         unsigned int ret_data_len;
1535         struct duplicate_extents_to_file dup_ext_buf;
1536         struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink);
1537
1538         /* server fileays advertise duplicate extent support with this flag */
1539         if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) &
1540              FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0)
1541                 return -EOPNOTSUPP;
1542
1543         dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid;
1544         dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid;
1545         dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off);
1546         dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off);
1547         dup_ext_buf.ByteCount = cpu_to_le64(len);
1548         cifs_dbg(FYI, "duplicate extents: src off %lld dst off %lld len %lld",
1549                 src_off, dest_off, len);
1550
1551         rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false);
1552         if (rc)
1553                 goto duplicate_extents_out;
1554
1555         rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1556                         trgtfile->fid.volatile_fid,
1557                         FSCTL_DUPLICATE_EXTENTS_TO_FILE,
1558                         true /* is_fsctl */,
1559                         (char *)&dup_ext_buf,
1560                         sizeof(struct duplicate_extents_to_file),
1561                         NULL,
1562                         &ret_data_len);
1563
1564         if (ret_data_len > 0)
1565                 cifs_dbg(FYI, "non-zero response length in duplicate extents");
1566
1567 duplicate_extents_out:
1568         return rc;
1569 }
1570
1571 static int
1572 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
1573                    struct cifsFileInfo *cfile)
1574 {
1575         return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
1576                             cfile->fid.volatile_fid);
1577 }
1578
1579 static int
1580 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
1581                    struct cifsFileInfo *cfile)
1582 {
1583         struct fsctl_set_integrity_information_req integr_info;
1584         unsigned int ret_data_len;
1585
1586         integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED);
1587         integr_info.Flags = 0;
1588         integr_info.Reserved = 0;
1589
1590         return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1591                         cfile->fid.volatile_fid,
1592                         FSCTL_SET_INTEGRITY_INFORMATION,
1593                         true /* is_fsctl */,
1594                         (char *)&integr_info,
1595                         sizeof(struct fsctl_set_integrity_information_req),
1596                         NULL,
1597                         &ret_data_len);
1598
1599 }
1600
1601 /* GMT Token is @GMT-YYYY.MM.DD-HH.MM.SS Unicode which is 48 bytes + null */
1602 #define GMT_TOKEN_SIZE 50
1603
1604 /*
1605  * Input buffer contains (empty) struct smb_snapshot array with size filled in
1606  * For output see struct SRV_SNAPSHOT_ARRAY in MS-SMB2 section 2.2.32.2
1607  */
1608 static int
1609 smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon,
1610                    struct cifsFileInfo *cfile, void __user *ioc_buf)
1611 {
1612         char *retbuf = NULL;
1613         unsigned int ret_data_len = 0;
1614         int rc;
1615         struct smb_snapshot_array snapshot_in;
1616
1617         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1618                         cfile->fid.volatile_fid,
1619                         FSCTL_SRV_ENUMERATE_SNAPSHOTS,
1620                         true /* is_fsctl */,
1621                         NULL, 0 /* no input data */,
1622                         (char **)&retbuf,
1623                         &ret_data_len);
1624         cifs_dbg(FYI, "enum snaphots ioctl returned %d and ret buflen is %d\n",
1625                         rc, ret_data_len);
1626         if (rc)
1627                 return rc;
1628
1629         if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) {
1630                 /* Fixup buffer */
1631                 if (copy_from_user(&snapshot_in, ioc_buf,
1632                     sizeof(struct smb_snapshot_array))) {
1633                         rc = -EFAULT;
1634                         kfree(retbuf);
1635                         return rc;
1636                 }
1637
1638                 /*
1639                  * Check for min size, ie not large enough to fit even one GMT
1640                  * token (snapshot).  On the first ioctl some users may pass in
1641                  * smaller size (or zero) to simply get the size of the array
1642                  * so the user space caller can allocate sufficient memory
1643                  * and retry the ioctl again with larger array size sufficient
1644                  * to hold all of the snapshot GMT tokens on the second try.
1645                  */
1646                 if (snapshot_in.snapshot_array_size < GMT_TOKEN_SIZE)
1647                         ret_data_len = sizeof(struct smb_snapshot_array);
1648
1649                 /*
1650                  * We return struct SRV_SNAPSHOT_ARRAY, followed by
1651                  * the snapshot array (of 50 byte GMT tokens) each
1652                  * representing an available previous version of the data
1653                  */
1654                 if (ret_data_len > (snapshot_in.snapshot_array_size +
1655                                         sizeof(struct smb_snapshot_array)))
1656                         ret_data_len = snapshot_in.snapshot_array_size +
1657                                         sizeof(struct smb_snapshot_array);
1658
1659                 if (copy_to_user(ioc_buf, retbuf, ret_data_len))
1660                         rc = -EFAULT;
1661         }
1662
1663         kfree(retbuf);
1664         return rc;
1665 }
1666
1667 static int
1668 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
1669                      const char *path, struct cifs_sb_info *cifs_sb,
1670                      struct cifs_fid *fid, __u16 search_flags,
1671                      struct cifs_search_info *srch_inf)
1672 {
1673         __le16 *utf16_path;
1674         int rc;
1675         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1676         struct cifs_open_parms oparms;
1677
1678         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1679         if (!utf16_path)
1680                 return -ENOMEM;
1681
1682         oparms.tcon = tcon;
1683         oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
1684         oparms.disposition = FILE_OPEN;
1685         if (backup_cred(cifs_sb))
1686                 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
1687         else
1688                 oparms.create_options = 0;
1689         oparms.fid = fid;
1690         oparms.reconnect = false;
1691
1692         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
1693         kfree(utf16_path);
1694         if (rc) {
1695                 cifs_dbg(FYI, "open dir failed rc=%d\n", rc);
1696                 return rc;
1697         }
1698
1699         srch_inf->entries_in_buffer = 0;
1700         srch_inf->index_of_last_entry = 2;
1701
1702         rc = SMB2_query_directory(xid, tcon, fid->persistent_fid,
1703                                   fid->volatile_fid, 0, srch_inf);
1704         if (rc) {
1705                 cifs_dbg(FYI, "query directory failed rc=%d\n", rc);
1706                 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1707         }
1708         return rc;
1709 }
1710
1711 static int
1712 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
1713                     struct cifs_fid *fid, __u16 search_flags,
1714                     struct cifs_search_info *srch_inf)
1715 {
1716         return SMB2_query_directory(xid, tcon, fid->persistent_fid,
1717                                     fid->volatile_fid, 0, srch_inf);
1718 }
1719
1720 static int
1721 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
1722                struct cifs_fid *fid)
1723 {
1724         return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1725 }
1726
1727 /*
1728 * If we negotiate SMB2 protocol and get STATUS_PENDING - update
1729 * the number of credits and return true. Otherwise - return false.
1730 */
1731 static bool
1732 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server, int length)
1733 {
1734         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
1735
1736         if (shdr->Status != STATUS_PENDING)
1737                 return false;
1738
1739         if (!length) {
1740                 spin_lock(&server->req_lock);
1741                 server->credits += le16_to_cpu(shdr->CreditRequest);
1742                 spin_unlock(&server->req_lock);
1743                 wake_up(&server->request_q);
1744         }
1745
1746         return true;
1747 }
1748
1749 static bool
1750 smb2_is_session_expired(char *buf)
1751 {
1752         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
1753
1754         if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED &&
1755             shdr->Status != STATUS_USER_SESSION_DELETED)
1756                 return false;
1757
1758         trace_smb3_ses_expired(shdr->TreeId, shdr->SessionId,
1759                                le16_to_cpu(shdr->Command),
1760                                le64_to_cpu(shdr->MessageId));
1761         cifs_dbg(FYI, "Session expired or deleted\n");
1762
1763         return true;
1764 }
1765
1766 static int
1767 smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
1768                      struct cifsInodeInfo *cinode)
1769 {
1770         if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
1771                 return SMB2_lease_break(0, tcon, cinode->lease_key,
1772                                         smb2_get_lease_state(cinode));
1773
1774         return SMB2_oplock_break(0, tcon, fid->persistent_fid,
1775                                  fid->volatile_fid,
1776                                  CIFS_CACHE_READ(cinode) ? 1 : 0);
1777 }
1778
1779 void
1780 smb2_set_related(struct smb_rqst *rqst)
1781 {
1782         struct smb2_sync_hdr *shdr;
1783
1784         shdr = (struct smb2_sync_hdr *)(rqst->rq_iov[0].iov_base);
1785         shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
1786 }
1787
1788 char smb2_padding[7] = {0, 0, 0, 0, 0, 0, 0};
1789
1790 void
1791 smb2_set_next_command(struct cifs_tcon *tcon, struct smb_rqst *rqst)
1792 {
1793         struct smb2_sync_hdr *shdr;
1794         struct cifs_ses *ses = tcon->ses;
1795         struct TCP_Server_Info *server = ses->server;
1796         unsigned long len = smb_rqst_len(server, rqst);
1797         int i, num_padding;
1798
1799         /* SMB headers in a compound are 8 byte aligned. */
1800
1801         /* No padding needed */
1802         if (!(len & 7))
1803                 goto finished;
1804
1805         num_padding = 8 - (len & 7);
1806         if (!smb3_encryption_required(tcon)) {
1807                 /*
1808                  * If we do not have encryption then we can just add an extra
1809                  * iov for the padding.
1810                  */
1811                 rqst->rq_iov[rqst->rq_nvec].iov_base = smb2_padding;
1812                 rqst->rq_iov[rqst->rq_nvec].iov_len = num_padding;
1813                 rqst->rq_nvec++;
1814                 len += num_padding;
1815         } else {
1816                 /*
1817                  * We can not add a small padding iov for the encryption case
1818                  * because the encryption framework can not handle the padding
1819                  * iovs.
1820                  * We have to flatten this into a single buffer and add
1821                  * the padding to it.
1822                  */
1823                 for (i = 1; i < rqst->rq_nvec; i++) {
1824                         memcpy(rqst->rq_iov[0].iov_base +
1825                                rqst->rq_iov[0].iov_len,
1826                                rqst->rq_iov[i].iov_base,
1827                                rqst->rq_iov[i].iov_len);
1828                         rqst->rq_iov[0].iov_len += rqst->rq_iov[i].iov_len;
1829                 }
1830                 memset(rqst->rq_iov[0].iov_base + rqst->rq_iov[0].iov_len,
1831                        0, num_padding);
1832                 rqst->rq_iov[0].iov_len += num_padding;
1833                 len += num_padding;
1834                 rqst->rq_nvec = 1;
1835         }
1836
1837  finished:
1838         shdr = (struct smb2_sync_hdr *)(rqst->rq_iov[0].iov_base);
1839         shdr->NextCommand = cpu_to_le32(len);
1840 }
1841
1842 /*
1843  * Passes the query info response back to the caller on success.
1844  * Caller need to free this with free_rsp_buf().
1845  */
1846 int
1847 smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon,
1848                          __le16 *utf16_path, u32 desired_access,
1849                          u32 class, u32 type, u32 output_len,
1850                          struct kvec *rsp, int *buftype,
1851                          struct cifs_sb_info *cifs_sb)
1852 {
1853         struct cifs_ses *ses = tcon->ses;
1854         int flags = 0;
1855         struct smb_rqst rqst[3];
1856         int resp_buftype[3];
1857         struct kvec rsp_iov[3];
1858         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
1859         struct kvec qi_iov[1];
1860         struct kvec close_iov[1];
1861         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1862         struct cifs_open_parms oparms;
1863         struct cifs_fid fid;
1864         int rc;
1865
1866         if (smb3_encryption_required(tcon))
1867                 flags |= CIFS_TRANSFORM_REQ;
1868
1869         memset(rqst, 0, sizeof(rqst));
1870         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1871         memset(rsp_iov, 0, sizeof(rsp_iov));
1872
1873         memset(&open_iov, 0, sizeof(open_iov));
1874         rqst[0].rq_iov = open_iov;
1875         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1876
1877         oparms.tcon = tcon;
1878         oparms.desired_access = desired_access;
1879         oparms.disposition = FILE_OPEN;
1880         if (cifs_sb && backup_cred(cifs_sb))
1881                 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
1882         else
1883                 oparms.create_options = 0;
1884         oparms.fid = &fid;
1885         oparms.reconnect = false;
1886
1887         rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, utf16_path);
1888         if (rc)
1889                 goto qic_exit;
1890         smb2_set_next_command(tcon, &rqst[0]);
1891
1892         memset(&qi_iov, 0, sizeof(qi_iov));
1893         rqst[1].rq_iov = qi_iov;
1894         rqst[1].rq_nvec = 1;
1895
1896         rc = SMB2_query_info_init(tcon, &rqst[1], COMPOUND_FID, COMPOUND_FID,
1897                                   class, type, 0,
1898                                   output_len, 0,
1899                                   NULL);
1900         if (rc)
1901                 goto qic_exit;
1902         smb2_set_next_command(tcon, &rqst[1]);
1903         smb2_set_related(&rqst[1]);
1904
1905         memset(&close_iov, 0, sizeof(close_iov));
1906         rqst[2].rq_iov = close_iov;
1907         rqst[2].rq_nvec = 1;
1908
1909         rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID);
1910         if (rc)
1911                 goto qic_exit;
1912         smb2_set_related(&rqst[2]);
1913
1914         rc = compound_send_recv(xid, ses, flags, 3, rqst,
1915                                 resp_buftype, rsp_iov);
1916         if (rc) {
1917                 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1918                 goto qic_exit;
1919         }
1920         *rsp = rsp_iov[1];
1921         *buftype = resp_buftype[1];
1922
1923  qic_exit:
1924         SMB2_open_free(&rqst[0]);
1925         SMB2_query_info_free(&rqst[1]);
1926         SMB2_close_free(&rqst[2]);
1927         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1928         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1929         return rc;
1930 }
1931
1932 static int
1933 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
1934              struct kstatfs *buf)
1935 {
1936         struct smb2_query_info_rsp *rsp;
1937         struct smb2_fs_full_size_info *info = NULL;
1938         __le16 utf16_path = 0; /* Null - open root of share */
1939         struct kvec rsp_iov = {NULL, 0};
1940         int buftype = CIFS_NO_BUFFER;
1941         int rc;
1942
1943
1944         rc = smb2_query_info_compound(xid, tcon, &utf16_path,
1945                                       FILE_READ_ATTRIBUTES,
1946                                       FS_FULL_SIZE_INFORMATION,
1947                                       SMB2_O_INFO_FILESYSTEM,
1948                                       sizeof(struct smb2_fs_full_size_info),
1949                                       &rsp_iov, &buftype, NULL);
1950         if (rc)
1951                 goto qfs_exit;
1952
1953         rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
1954         buf->f_type = SMB2_MAGIC_NUMBER;
1955         info = (struct smb2_fs_full_size_info *)(
1956                 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
1957         rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
1958                                le32_to_cpu(rsp->OutputBufferLength),
1959                                &rsp_iov,
1960                                sizeof(struct smb2_fs_full_size_info));
1961         if (!rc)
1962                 smb2_copy_fs_info_to_kstatfs(info, buf);
1963
1964 qfs_exit:
1965         free_rsp_buf(buftype, rsp_iov.iov_base);
1966         return rc;
1967 }
1968
1969 static int
1970 smb311_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
1971              struct kstatfs *buf)
1972 {
1973         int rc;
1974         __le16 srch_path = 0; /* Null - open root of share */
1975         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1976         struct cifs_open_parms oparms;
1977         struct cifs_fid fid;
1978
1979         if (!tcon->posix_extensions)
1980                 return smb2_queryfs(xid, tcon, buf);
1981
1982         oparms.tcon = tcon;
1983         oparms.desired_access = FILE_READ_ATTRIBUTES;
1984         oparms.disposition = FILE_OPEN;
1985         oparms.create_options = 0;
1986         oparms.fid = &fid;
1987         oparms.reconnect = false;
1988
1989         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, NULL);
1990         if (rc)
1991                 return rc;
1992
1993         rc = SMB311_posix_qfs_info(xid, tcon, fid.persistent_fid,
1994                                    fid.volatile_fid, buf);
1995         buf->f_type = SMB2_MAGIC_NUMBER;
1996         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
1997         return rc;
1998 }
1999
2000 static bool
2001 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
2002 {
2003         return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
2004                ob1->fid.volatile_fid == ob2->fid.volatile_fid;
2005 }
2006
2007 static int
2008 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
2009                __u64 length, __u32 type, int lock, int unlock, bool wait)
2010 {
2011         if (unlock && !lock)
2012                 type = SMB2_LOCKFLAG_UNLOCK;
2013         return SMB2_lock(xid, tlink_tcon(cfile->tlink),
2014                          cfile->fid.persistent_fid, cfile->fid.volatile_fid,
2015                          current->tgid, length, offset, type, wait);
2016 }
2017
2018 static void
2019 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
2020 {
2021         memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
2022 }
2023
2024 static void
2025 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
2026 {
2027         memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
2028 }
2029
2030 static void
2031 smb2_new_lease_key(struct cifs_fid *fid)
2032 {
2033         generate_random_uuid(fid->lease_key);
2034 }
2035
2036 static int
2037 smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,
2038                    const char *search_name,
2039                    struct dfs_info3_param **target_nodes,
2040                    unsigned int *num_of_nodes,
2041                    const struct nls_table *nls_codepage, int remap)
2042 {
2043         int rc;
2044         __le16 *utf16_path = NULL;
2045         int utf16_path_len = 0;
2046         struct cifs_tcon *tcon;
2047         struct fsctl_get_dfs_referral_req *dfs_req = NULL;
2048         struct get_dfs_referral_rsp *dfs_rsp = NULL;
2049         u32 dfs_req_size = 0, dfs_rsp_size = 0;
2050
2051         cifs_dbg(FYI, "smb2_get_dfs_refer path <%s>\n", search_name);
2052
2053         /*
2054          * Try to use the IPC tcon, otherwise just use any
2055          */
2056         tcon = ses->tcon_ipc;
2057         if (tcon == NULL) {
2058                 spin_lock(&cifs_tcp_ses_lock);
2059                 tcon = list_first_entry_or_null(&ses->tcon_list,
2060                                                 struct cifs_tcon,
2061                                                 tcon_list);
2062                 if (tcon)
2063                         tcon->tc_count++;
2064                 spin_unlock(&cifs_tcp_ses_lock);
2065         }
2066
2067         if (tcon == NULL) {
2068                 cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n",
2069                          ses);
2070                 rc = -ENOTCONN;
2071                 goto out;
2072         }
2073
2074         utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX,
2075                                            &utf16_path_len,
2076                                            nls_codepage, remap);
2077         if (!utf16_path) {
2078                 rc = -ENOMEM;
2079                 goto out;
2080         }
2081
2082         dfs_req_size = sizeof(*dfs_req) + utf16_path_len;
2083         dfs_req = kzalloc(dfs_req_size, GFP_KERNEL);
2084         if (!dfs_req) {
2085                 rc = -ENOMEM;
2086                 goto out;
2087         }
2088
2089         /* Highest DFS referral version understood */
2090         dfs_req->MaxReferralLevel = DFS_VERSION;
2091
2092         /* Path to resolve in an UTF-16 null-terminated string */
2093         memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len);
2094
2095         do {
2096                 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
2097                                 FSCTL_DFS_GET_REFERRALS,
2098                                 true /* is_fsctl */,
2099                                 (char *)dfs_req, dfs_req_size,
2100                                 (char **)&dfs_rsp, &dfs_rsp_size);
2101         } while (rc == -EAGAIN);
2102
2103         if (rc) {
2104                 if ((rc != -ENOENT) && (rc != -EOPNOTSUPP))
2105                         cifs_dbg(VFS, "ioctl error in smb2_get_dfs_refer rc=%d\n", rc);
2106                 goto out;
2107         }
2108
2109         rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size,
2110                                  num_of_nodes, target_nodes,
2111                                  nls_codepage, remap, search_name,
2112                                  true /* is_unicode */);
2113         if (rc) {
2114                 cifs_dbg(VFS, "parse error in smb2_get_dfs_refer rc=%d\n", rc);
2115                 goto out;
2116         }
2117
2118  out:
2119         if (tcon && !tcon->ipc) {
2120                 /* ipc tcons are not refcounted */
2121                 spin_lock(&cifs_tcp_ses_lock);
2122                 tcon->tc_count--;
2123                 spin_unlock(&cifs_tcp_ses_lock);
2124         }
2125         kfree(utf16_path);
2126         kfree(dfs_req);
2127         kfree(dfs_rsp);
2128         return rc;
2129 }
2130 #define SMB2_SYMLINK_STRUCT_SIZE \
2131         (sizeof(struct smb2_err_rsp) - 1 + sizeof(struct smb2_symlink_err_rsp))
2132
2133 static int
2134 smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
2135                    const char *full_path, char **target_path,
2136                    struct cifs_sb_info *cifs_sb)
2137 {
2138         int rc;
2139         __le16 *utf16_path;
2140         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2141         struct cifs_open_parms oparms;
2142         struct cifs_fid fid;
2143         struct kvec err_iov = {NULL, 0};
2144         struct smb2_err_rsp *err_buf = NULL;
2145         int resp_buftype;
2146         struct smb2_symlink_err_rsp *symlink;
2147         unsigned int sub_len;
2148         unsigned int sub_offset;
2149         unsigned int print_len;
2150         unsigned int print_offset;
2151
2152         cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
2153
2154         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
2155         if (!utf16_path)
2156                 return -ENOMEM;
2157
2158         oparms.tcon = tcon;
2159         oparms.desired_access = FILE_READ_ATTRIBUTES;
2160         oparms.disposition = FILE_OPEN;
2161         if (backup_cred(cifs_sb))
2162                 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
2163         else
2164                 oparms.create_options = 0;
2165         oparms.fid = &fid;
2166         oparms.reconnect = false;
2167
2168         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, &err_iov,
2169                        &resp_buftype);
2170         if (!rc || !err_iov.iov_base) {
2171                 rc = -ENOENT;
2172                 goto free_path;
2173         }
2174
2175         err_buf = err_iov.iov_base;
2176         if (le32_to_cpu(err_buf->ByteCount) < sizeof(struct smb2_symlink_err_rsp) ||
2177             err_iov.iov_len < SMB2_SYMLINK_STRUCT_SIZE) {
2178                 rc = -ENOENT;
2179                 goto querty_exit;
2180         }
2181
2182         /* open must fail on symlink - reset rc */
2183         rc = 0;
2184         symlink = (struct smb2_symlink_err_rsp *)err_buf->ErrorData;
2185         sub_len = le16_to_cpu(symlink->SubstituteNameLength);
2186         sub_offset = le16_to_cpu(symlink->SubstituteNameOffset);
2187         print_len = le16_to_cpu(symlink->PrintNameLength);
2188         print_offset = le16_to_cpu(symlink->PrintNameOffset);
2189
2190         if (err_iov.iov_len < SMB2_SYMLINK_STRUCT_SIZE + sub_offset + sub_len) {
2191                 rc = -ENOENT;
2192                 goto querty_exit;
2193         }
2194
2195         if (err_iov.iov_len <
2196             SMB2_SYMLINK_STRUCT_SIZE + print_offset + print_len) {
2197                 rc = -ENOENT;
2198                 goto querty_exit;
2199         }
2200
2201         *target_path = cifs_strndup_from_utf16(
2202                                 (char *)symlink->PathBuffer + sub_offset,
2203                                 sub_len, true, cifs_sb->local_nls);
2204         if (!(*target_path)) {
2205                 rc = -ENOMEM;
2206                 goto querty_exit;
2207         }
2208         convert_delimiter(*target_path, '/');
2209         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
2210
2211  querty_exit:
2212         free_rsp_buf(resp_buftype, err_buf);
2213  free_path:
2214         kfree(utf16_path);
2215         return rc;
2216 }
2217
2218 #ifdef CONFIG_CIFS_ACL
2219 static struct cifs_ntsd *
2220 get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb,
2221                 const struct cifs_fid *cifsfid, u32 *pacllen)
2222 {
2223         struct cifs_ntsd *pntsd = NULL;
2224         unsigned int xid;
2225         int rc = -EOPNOTSUPP;
2226         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
2227
2228         if (IS_ERR(tlink))
2229                 return ERR_CAST(tlink);
2230
2231         xid = get_xid();
2232         cifs_dbg(FYI, "trying to get acl\n");
2233
2234         rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid,
2235                             cifsfid->volatile_fid, (void **)&pntsd, pacllen);
2236         free_xid(xid);
2237
2238         cifs_put_tlink(tlink);
2239
2240         cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
2241         if (rc)
2242                 return ERR_PTR(rc);
2243         return pntsd;
2244
2245 }
2246
2247 static struct cifs_ntsd *
2248 get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb,
2249                 const char *path, u32 *pacllen)
2250 {
2251         struct cifs_ntsd *pntsd = NULL;
2252         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2253         unsigned int xid;
2254         int rc;
2255         struct cifs_tcon *tcon;
2256         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
2257         struct cifs_fid fid;
2258         struct cifs_open_parms oparms;
2259         __le16 *utf16_path;
2260
2261         cifs_dbg(FYI, "get smb3 acl for path %s\n", path);
2262         if (IS_ERR(tlink))
2263                 return ERR_CAST(tlink);
2264
2265         tcon = tlink_tcon(tlink);
2266         xid = get_xid();
2267
2268         if (backup_cred(cifs_sb))
2269                 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
2270         else
2271                 oparms.create_options = 0;
2272
2273         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2274         if (!utf16_path) {
2275                 rc = -ENOMEM;
2276                 free_xid(xid);
2277                 return ERR_PTR(rc);
2278         }
2279
2280         oparms.tcon = tcon;
2281         oparms.desired_access = READ_CONTROL;
2282         oparms.disposition = FILE_OPEN;
2283         oparms.fid = &fid;
2284         oparms.reconnect = false;
2285
2286         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
2287         kfree(utf16_path);
2288         if (!rc) {
2289                 rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
2290                             fid.volatile_fid, (void **)&pntsd, pacllen);
2291                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2292         }
2293
2294         cifs_put_tlink(tlink);
2295         free_xid(xid);
2296
2297         cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
2298         if (rc)
2299                 return ERR_PTR(rc);
2300         return pntsd;
2301 }
2302
2303 #ifdef CONFIG_CIFS_ACL
2304 static int
2305 set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen,
2306                 struct inode *inode, const char *path, int aclflag)
2307 {
2308         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2309         unsigned int xid;
2310         int rc, access_flags = 0;
2311         struct cifs_tcon *tcon;
2312         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2313         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
2314         struct cifs_fid fid;
2315         struct cifs_open_parms oparms;
2316         __le16 *utf16_path;
2317
2318         cifs_dbg(FYI, "set smb3 acl for path %s\n", path);
2319         if (IS_ERR(tlink))
2320                 return PTR_ERR(tlink);
2321
2322         tcon = tlink_tcon(tlink);
2323         xid = get_xid();
2324
2325         if (backup_cred(cifs_sb))
2326                 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
2327         else
2328                 oparms.create_options = 0;
2329
2330         if (aclflag == CIFS_ACL_OWNER || aclflag == CIFS_ACL_GROUP)
2331                 access_flags = WRITE_OWNER;
2332         else
2333                 access_flags = WRITE_DAC;
2334
2335         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2336         if (!utf16_path) {
2337                 rc = -ENOMEM;
2338                 free_xid(xid);
2339                 return rc;
2340         }
2341
2342         oparms.tcon = tcon;
2343         oparms.desired_access = access_flags;
2344         oparms.disposition = FILE_OPEN;
2345         oparms.path = path;
2346         oparms.fid = &fid;
2347         oparms.reconnect = false;
2348
2349         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
2350         kfree(utf16_path);
2351         if (!rc) {
2352                 rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
2353                             fid.volatile_fid, pnntsd, acllen, aclflag);
2354                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2355         }
2356
2357         cifs_put_tlink(tlink);
2358         free_xid(xid);
2359         return rc;
2360 }
2361 #endif /* CIFS_ACL */
2362
2363 /* Retrieve an ACL from the server */
2364 static struct cifs_ntsd *
2365 get_smb2_acl(struct cifs_sb_info *cifs_sb,
2366                                       struct inode *inode, const char *path,
2367                                       u32 *pacllen)
2368 {
2369         struct cifs_ntsd *pntsd = NULL;
2370         struct cifsFileInfo *open_file = NULL;
2371
2372         if (inode)
2373                 open_file = find_readable_file(CIFS_I(inode), true);
2374         if (!open_file)
2375                 return get_smb2_acl_by_path(cifs_sb, path, pacllen);
2376
2377         pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen);
2378         cifsFileInfo_put(open_file);
2379         return pntsd;
2380 }
2381 #endif
2382
2383 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
2384                             loff_t offset, loff_t len, bool keep_size)
2385 {
2386         struct inode *inode;
2387         struct cifsInodeInfo *cifsi;
2388         struct cifsFileInfo *cfile = file->private_data;
2389         struct file_zero_data_information fsctl_buf;
2390         long rc;
2391         unsigned int xid;
2392
2393         xid = get_xid();
2394
2395         inode = d_inode(cfile->dentry);
2396         cifsi = CIFS_I(inode);
2397
2398         /* if file not oplocked can't be sure whether asking to extend size */
2399         if (!CIFS_CACHE_READ(cifsi))
2400                 if (keep_size == false) {
2401                         rc = -EOPNOTSUPP;
2402                         free_xid(xid);
2403                         return rc;
2404                 }
2405
2406         /*
2407          * Must check if file sparse since fallocate -z (zero range) assumes
2408          * non-sparse allocation
2409          */
2410         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) {
2411                 rc = -EOPNOTSUPP;
2412                 free_xid(xid);
2413                 return rc;
2414         }
2415
2416         /*
2417          * need to make sure we are not asked to extend the file since the SMB3
2418          * fsctl does not change the file size. In the future we could change
2419          * this to zero the first part of the range then set the file size
2420          * which for a non sparse file would zero the newly extended range
2421          */
2422         if (keep_size == false)
2423                 if (i_size_read(inode) < offset + len) {
2424                         rc = -EOPNOTSUPP;
2425                         free_xid(xid);
2426                         return rc;
2427                 }
2428
2429         cifs_dbg(FYI, "offset %lld len %lld", offset, len);
2430
2431         fsctl_buf.FileOffset = cpu_to_le64(offset);
2432         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
2433
2434         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2435                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
2436                         true /* is_fctl */, (char *)&fsctl_buf,
2437                         sizeof(struct file_zero_data_information), NULL, NULL);
2438         free_xid(xid);
2439         return rc;
2440 }
2441
2442 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
2443                             loff_t offset, loff_t len)
2444 {
2445         struct inode *inode;
2446         struct cifsInodeInfo *cifsi;
2447         struct cifsFileInfo *cfile = file->private_data;
2448         struct file_zero_data_information fsctl_buf;
2449         long rc;
2450         unsigned int xid;
2451         __u8 set_sparse = 1;
2452
2453         xid = get_xid();
2454
2455         inode = d_inode(cfile->dentry);
2456         cifsi = CIFS_I(inode);
2457
2458         /* Need to make file sparse, if not already, before freeing range. */
2459         /* Consider adding equivalent for compressed since it could also work */
2460         if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse)) {
2461                 rc = -EOPNOTSUPP;
2462                 free_xid(xid);
2463                 return rc;
2464         }
2465
2466         cifs_dbg(FYI, "offset %lld len %lld", offset, len);
2467
2468         fsctl_buf.FileOffset = cpu_to_le64(offset);
2469         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
2470
2471         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2472                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
2473                         true /* is_fctl */, (char *)&fsctl_buf,
2474                         sizeof(struct file_zero_data_information), NULL, NULL);
2475         free_xid(xid);
2476         return rc;
2477 }
2478
2479 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
2480                             loff_t off, loff_t len, bool keep_size)
2481 {
2482         struct inode *inode;
2483         struct cifsInodeInfo *cifsi;
2484         struct cifsFileInfo *cfile = file->private_data;
2485         long rc = -EOPNOTSUPP;
2486         unsigned int xid;
2487
2488         xid = get_xid();
2489
2490         inode = d_inode(cfile->dentry);
2491         cifsi = CIFS_I(inode);
2492
2493         /* if file not oplocked can't be sure whether asking to extend size */
2494         if (!CIFS_CACHE_READ(cifsi))
2495                 if (keep_size == false) {
2496                         free_xid(xid);
2497                         return rc;
2498                 }
2499
2500         /*
2501          * Files are non-sparse by default so falloc may be a no-op
2502          * Must check if file sparse. If not sparse, and not extending
2503          * then no need to do anything since file already allocated
2504          */
2505         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
2506                 if (keep_size == true)
2507                         rc = 0;
2508                 /* check if extending file */
2509                 else if (i_size_read(inode) >= off + len)
2510                         /* not extending file and already not sparse */
2511                         rc = 0;
2512                 /* BB: in future add else clause to extend file */
2513                 else
2514                         rc = -EOPNOTSUPP;
2515                 free_xid(xid);
2516                 return rc;
2517         }
2518
2519         if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
2520                 /*
2521                  * Check if falloc starts within first few pages of file
2522                  * and ends within a few pages of the end of file to
2523                  * ensure that most of file is being forced to be
2524                  * fallocated now. If so then setting whole file sparse
2525                  * ie potentially making a few extra pages at the beginning
2526                  * or end of the file non-sparse via set_sparse is harmless.
2527                  */
2528                 if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) {
2529                         rc = -EOPNOTSUPP;
2530                         free_xid(xid);
2531                         return rc;
2532                 }
2533
2534                 rc = smb2_set_sparse(xid, tcon, cfile, inode, false);
2535         }
2536         /* BB: else ... in future add code to extend file and set sparse */
2537
2538
2539         free_xid(xid);
2540         return rc;
2541 }
2542
2543
2544 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
2545                            loff_t off, loff_t len)
2546 {
2547         /* KEEP_SIZE already checked for by do_fallocate */
2548         if (mode & FALLOC_FL_PUNCH_HOLE)
2549                 return smb3_punch_hole(file, tcon, off, len);
2550         else if (mode & FALLOC_FL_ZERO_RANGE) {
2551                 if (mode & FALLOC_FL_KEEP_SIZE)
2552                         return smb3_zero_range(file, tcon, off, len, true);
2553                 return smb3_zero_range(file, tcon, off, len, false);
2554         } else if (mode == FALLOC_FL_KEEP_SIZE)
2555                 return smb3_simple_falloc(file, tcon, off, len, true);
2556         else if (mode == 0)
2557                 return smb3_simple_falloc(file, tcon, off, len, false);
2558
2559         return -EOPNOTSUPP;
2560 }
2561
2562 static void
2563 smb2_downgrade_oplock(struct TCP_Server_Info *server,
2564                         struct cifsInodeInfo *cinode, bool set_level2)
2565 {
2566         if (set_level2)
2567                 server->ops->set_oplock_level(cinode, SMB2_OPLOCK_LEVEL_II,
2568                                                 0, NULL);
2569         else
2570                 server->ops->set_oplock_level(cinode, 0, 0, NULL);
2571 }
2572
2573 static void
2574 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
2575                       unsigned int epoch, bool *purge_cache)
2576 {
2577         oplock &= 0xFF;
2578         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
2579                 return;
2580         if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
2581                 cinode->oplock = CIFS_CACHE_RHW_FLG;
2582                 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
2583                          &cinode->vfs_inode);
2584         } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
2585                 cinode->oplock = CIFS_CACHE_RW_FLG;
2586                 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
2587                          &cinode->vfs_inode);
2588         } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
2589                 cinode->oplock = CIFS_CACHE_READ_FLG;
2590                 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
2591                          &cinode->vfs_inode);
2592         } else
2593                 cinode->oplock = 0;
2594 }
2595
2596 static void
2597 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
2598                        unsigned int epoch, bool *purge_cache)
2599 {
2600         char message[5] = {0};
2601
2602         oplock &= 0xFF;
2603         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
2604                 return;
2605
2606         cinode->oplock = 0;
2607         if (oplock & SMB2_LEASE_READ_CACHING_HE) {
2608                 cinode->oplock |= CIFS_CACHE_READ_FLG;
2609                 strcat(message, "R");
2610         }
2611         if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
2612                 cinode->oplock |= CIFS_CACHE_HANDLE_FLG;
2613                 strcat(message, "H");
2614         }
2615         if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
2616                 cinode->oplock |= CIFS_CACHE_WRITE_FLG;
2617                 strcat(message, "W");
2618         }
2619         if (!cinode->oplock)
2620                 strcat(message, "None");
2621         cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
2622                  &cinode->vfs_inode);
2623 }
2624
2625 static void
2626 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
2627                       unsigned int epoch, bool *purge_cache)
2628 {
2629         unsigned int old_oplock = cinode->oplock;
2630
2631         smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
2632
2633         if (purge_cache) {
2634                 *purge_cache = false;
2635                 if (old_oplock == CIFS_CACHE_READ_FLG) {
2636                         if (cinode->oplock == CIFS_CACHE_READ_FLG &&
2637                             (epoch - cinode->epoch > 0))
2638                                 *purge_cache = true;
2639                         else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
2640                                  (epoch - cinode->epoch > 1))
2641                                 *purge_cache = true;
2642                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
2643                                  (epoch - cinode->epoch > 1))
2644                                 *purge_cache = true;
2645                         else if (cinode->oplock == 0 &&
2646                                  (epoch - cinode->epoch > 0))
2647                                 *purge_cache = true;
2648                 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
2649                         if (cinode->oplock == CIFS_CACHE_RH_FLG &&
2650                             (epoch - cinode->epoch > 0))
2651                                 *purge_cache = true;
2652                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
2653                                  (epoch - cinode->epoch > 1))
2654                                 *purge_cache = true;
2655                 }
2656                 cinode->epoch = epoch;
2657         }
2658 }
2659
2660 static bool
2661 smb2_is_read_op(__u32 oplock)
2662 {
2663         return oplock == SMB2_OPLOCK_LEVEL_II;
2664 }
2665
2666 static bool
2667 smb21_is_read_op(__u32 oplock)
2668 {
2669         return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
2670                !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
2671 }
2672
2673 static __le32
2674 map_oplock_to_lease(u8 oplock)
2675 {
2676         if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
2677                 return SMB2_LEASE_WRITE_CACHING | SMB2_LEASE_READ_CACHING;
2678         else if (oplock == SMB2_OPLOCK_LEVEL_II)
2679                 return SMB2_LEASE_READ_CACHING;
2680         else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
2681                 return SMB2_LEASE_HANDLE_CACHING | SMB2_LEASE_READ_CACHING |
2682                        SMB2_LEASE_WRITE_CACHING;
2683         return 0;
2684 }
2685
2686 static char *
2687 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
2688 {
2689         struct create_lease *buf;
2690
2691         buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
2692         if (!buf)
2693                 return NULL;
2694
2695         memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
2696         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
2697
2698         buf->ccontext.DataOffset = cpu_to_le16(offsetof
2699                                         (struct create_lease, lcontext));
2700         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
2701         buf->ccontext.NameOffset = cpu_to_le16(offsetof
2702                                 (struct create_lease, Name));
2703         buf->ccontext.NameLength = cpu_to_le16(4);
2704         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
2705         buf->Name[0] = 'R';
2706         buf->Name[1] = 'q';
2707         buf->Name[2] = 'L';
2708         buf->Name[3] = 's';
2709         return (char *)buf;
2710 }
2711
2712 static char *
2713 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
2714 {
2715         struct create_lease_v2 *buf;
2716
2717         buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
2718         if (!buf)
2719                 return NULL;
2720
2721         memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
2722         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
2723
2724         buf->ccontext.DataOffset = cpu_to_le16(offsetof
2725                                         (struct create_lease_v2, lcontext));
2726         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
2727         buf->ccontext.NameOffset = cpu_to_le16(offsetof
2728                                 (struct create_lease_v2, Name));
2729         buf->ccontext.NameLength = cpu_to_le16(4);
2730         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
2731         buf->Name[0] = 'R';
2732         buf->Name[1] = 'q';
2733         buf->Name[2] = 'L';
2734         buf->Name[3] = 's';
2735         return (char *)buf;
2736 }
2737
2738 static __u8
2739 smb2_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
2740 {
2741         struct create_lease *lc = (struct create_lease *)buf;
2742
2743         *epoch = 0; /* not used */
2744         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
2745                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
2746         return le32_to_cpu(lc->lcontext.LeaseState);
2747 }
2748
2749 static __u8
2750 smb3_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
2751 {
2752         struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
2753
2754         *epoch = le16_to_cpu(lc->lcontext.Epoch);
2755         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
2756                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
2757         if (lease_key)
2758                 memcpy(lease_key, &lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE);
2759         return le32_to_cpu(lc->lcontext.LeaseState);
2760 }
2761
2762 static unsigned int
2763 smb2_wp_retry_size(struct inode *inode)
2764 {
2765         return min_t(unsigned int, CIFS_SB(inode->i_sb)->wsize,
2766                      SMB2_MAX_BUFFER_SIZE);
2767 }
2768
2769 static bool
2770 smb2_dir_needs_close(struct cifsFileInfo *cfile)
2771 {
2772         return !cfile->invalidHandle;
2773 }
2774
2775 static void
2776 fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len,
2777                    struct smb_rqst *old_rq)
2778 {
2779         struct smb2_sync_hdr *shdr =
2780                         (struct smb2_sync_hdr *)old_rq->rq_iov[0].iov_base;
2781
2782         memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr));
2783         tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
2784         tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
2785         tr_hdr->Flags = cpu_to_le16(0x01);
2786         get_random_bytes(&tr_hdr->Nonce, SMB3_AES128CMM_NONCE);
2787         memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8);
2788 }
2789
2790 /* We can not use the normal sg_set_buf() as we will sometimes pass a
2791  * stack object as buf.
2792  */
2793 static inline void smb2_sg_set_buf(struct scatterlist *sg, const void *buf,
2794                                    unsigned int buflen)
2795 {
2796         sg_set_page(sg, virt_to_page(buf), buflen, offset_in_page(buf));
2797 }
2798
2799 /* Assumes the first rqst has a transform header as the first iov.
2800  * I.e.
2801  * rqst[0].rq_iov[0]  is transform header
2802  * rqst[0].rq_iov[1+] data to be encrypted/decrypted
2803  * rqst[1+].rq_iov[0+] data to be encrypted/decrypted
2804  */
2805 static struct scatterlist *
2806 init_sg(int num_rqst, struct smb_rqst *rqst, u8 *sign)
2807 {
2808         unsigned int sg_len;
2809         struct scatterlist *sg;
2810         unsigned int i;
2811         unsigned int j;
2812         unsigned int idx = 0;
2813         int skip;
2814
2815         sg_len = 1;
2816         for (i = 0; i < num_rqst; i++)
2817                 sg_len += rqst[i].rq_nvec + rqst[i].rq_npages;
2818
2819         sg = kmalloc_array(sg_len, sizeof(struct scatterlist), GFP_KERNEL);
2820         if (!sg)
2821                 return NULL;
2822
2823         sg_init_table(sg, sg_len);
2824         for (i = 0; i < num_rqst; i++) {
2825                 for (j = 0; j < rqst[i].rq_nvec; j++) {
2826                         /*
2827                          * The first rqst has a transform header where the
2828                          * first 20 bytes are not part of the encrypted blob
2829                          */
2830                         skip = (i == 0) && (j == 0) ? 20 : 0;
2831                         smb2_sg_set_buf(&sg[idx++],
2832                                         rqst[i].rq_iov[j].iov_base + skip,
2833                                         rqst[i].rq_iov[j].iov_len - skip);
2834                         }
2835
2836                 for (j = 0; j < rqst[i].rq_npages; j++) {
2837                         unsigned int len, offset;
2838
2839                         rqst_page_get_length(&rqst[i], j, &len, &offset);
2840                         sg_set_page(&sg[idx++], rqst[i].rq_pages[j], len, offset);
2841                 }
2842         }
2843         smb2_sg_set_buf(&sg[idx], sign, SMB2_SIGNATURE_SIZE);
2844         return sg;
2845 }
2846
2847 static int
2848 smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key)
2849 {
2850         struct cifs_ses *ses;
2851         u8 *ses_enc_key;
2852
2853         spin_lock(&cifs_tcp_ses_lock);
2854         list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
2855                 if (ses->Suid != ses_id)
2856                         continue;
2857                 ses_enc_key = enc ? ses->smb3encryptionkey :
2858                                                         ses->smb3decryptionkey;
2859                 memcpy(key, ses_enc_key, SMB3_SIGN_KEY_SIZE);
2860                 spin_unlock(&cifs_tcp_ses_lock);
2861                 return 0;
2862         }
2863         spin_unlock(&cifs_tcp_ses_lock);
2864
2865         return 1;
2866 }
2867 /*
2868  * Encrypt or decrypt @rqst message. @rqst[0] has the following format:
2869  * iov[0]   - transform header (associate data),
2870  * iov[1-N] - SMB2 header and pages - data to encrypt.
2871  * On success return encrypted data in iov[1-N] and pages, leave iov[0]
2872  * untouched.
2873  */
2874 static int
2875 crypt_message(struct TCP_Server_Info *server, int num_rqst,
2876               struct smb_rqst *rqst, int enc)
2877 {
2878         struct smb2_transform_hdr *tr_hdr =
2879                 (struct smb2_transform_hdr *)rqst[0].rq_iov[0].iov_base;
2880         unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20;
2881         int rc = 0;
2882         struct scatterlist *sg;
2883         u8 sign[SMB2_SIGNATURE_SIZE] = {};
2884         u8 key[SMB3_SIGN_KEY_SIZE];
2885         struct aead_request *req;
2886         char *iv;
2887         unsigned int iv_len;
2888         DECLARE_CRYPTO_WAIT(wait);
2889         struct crypto_aead *tfm;
2890         unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
2891
2892         rc = smb2_get_enc_key(server, tr_hdr->SessionId, enc, key);
2893         if (rc) {
2894                 cifs_dbg(VFS, "%s: Could not get %scryption key\n", __func__,
2895                          enc ? "en" : "de");
2896                 return 0;
2897         }
2898
2899         rc = smb3_crypto_aead_allocate(server);
2900         if (rc) {
2901                 cifs_dbg(VFS, "%s: crypto alloc failed\n", __func__);
2902                 return rc;
2903         }
2904
2905         tfm = enc ? server->secmech.ccmaesencrypt :
2906                                                 server->secmech.ccmaesdecrypt;
2907         rc = crypto_aead_setkey(tfm, key, SMB3_SIGN_KEY_SIZE);
2908         if (rc) {
2909                 cifs_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc);
2910                 return rc;
2911         }
2912
2913         rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE);
2914         if (rc) {
2915                 cifs_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc);
2916                 return rc;
2917         }
2918
2919         req = aead_request_alloc(tfm, GFP_KERNEL);
2920         if (!req) {
2921                 cifs_dbg(VFS, "%s: Failed to alloc aead request", __func__);
2922                 return -ENOMEM;
2923         }
2924
2925         if (!enc) {
2926                 memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE);
2927                 crypt_len += SMB2_SIGNATURE_SIZE;
2928         }
2929
2930         sg = init_sg(num_rqst, rqst, sign);
2931         if (!sg) {
2932                 cifs_dbg(VFS, "%s: Failed to init sg", __func__);
2933                 rc = -ENOMEM;
2934                 goto free_req;
2935         }
2936
2937         iv_len = crypto_aead_ivsize(tfm);
2938         iv = kzalloc(iv_len, GFP_KERNEL);
2939         if (!iv) {
2940                 cifs_dbg(VFS, "%s: Failed to alloc IV", __func__);
2941                 rc = -ENOMEM;
2942                 goto free_sg;
2943         }
2944         iv[0] = 3;
2945         memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES128CMM_NONCE);
2946
2947         aead_request_set_crypt(req, sg, sg, crypt_len, iv);
2948         aead_request_set_ad(req, assoc_data_len);
2949
2950         aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
2951                                   crypto_req_done, &wait);
2952
2953         rc = crypto_wait_req(enc ? crypto_aead_encrypt(req)
2954                                 : crypto_aead_decrypt(req), &wait);
2955
2956         if (!rc && enc)
2957                 memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE);
2958
2959         kfree(iv);
2960 free_sg:
2961         kfree(sg);
2962 free_req:
2963         kfree(req);
2964         return rc;
2965 }
2966
2967 void
2968 smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst)
2969 {
2970         int i, j;
2971
2972         for (i = 0; i < num_rqst; i++) {
2973                 if (rqst[i].rq_pages) {
2974                         for (j = rqst[i].rq_npages - 1; j >= 0; j--)
2975                                 put_page(rqst[i].rq_pages[j]);
2976                         kfree(rqst[i].rq_pages);
2977                 }
2978         }
2979 }
2980
2981 /*
2982  * This function will initialize new_rq and encrypt the content.
2983  * The first entry, new_rq[0], only contains a single iov which contains
2984  * a smb2_transform_hdr and is pre-allocated by the caller.
2985  * This function then populates new_rq[1+] with the content from olq_rq[0+].
2986  *
2987  * The end result is an array of smb_rqst structures where the first structure
2988  * only contains a single iov for the transform header which we then can pass
2989  * to crypt_message().
2990  *
2991  * new_rq[0].rq_iov[0] :  smb2_transform_hdr pre-allocated by the caller
2992  * new_rq[1+].rq_iov[*] == old_rq[0+].rq_iov[*] : SMB2/3 requests
2993  */
2994 static int
2995 smb3_init_transform_rq(struct TCP_Server_Info *server, int num_rqst,
2996                        struct smb_rqst *new_rq, struct smb_rqst *old_rq)
2997 {
2998         struct page **pages;
2999         struct smb2_transform_hdr *tr_hdr = new_rq[0].rq_iov[0].iov_base;
3000         unsigned int npages;
3001         unsigned int orig_len = 0;
3002         int i, j;
3003         int rc = -ENOMEM;
3004
3005         for (i = 1; i < num_rqst; i++) {
3006                 npages = old_rq[i - 1].rq_npages;
3007                 pages = kmalloc_array(npages, sizeof(struct page *),
3008                                       GFP_KERNEL);
3009                 if (!pages)
3010                         goto err_free;
3011
3012                 new_rq[i].rq_pages = pages;
3013                 new_rq[i].rq_npages = npages;
3014                 new_rq[i].rq_offset = old_rq[i - 1].rq_offset;
3015                 new_rq[i].rq_pagesz = old_rq[i - 1].rq_pagesz;
3016                 new_rq[i].rq_tailsz = old_rq[i - 1].rq_tailsz;
3017                 new_rq[i].rq_iov = old_rq[i - 1].rq_iov;
3018                 new_rq[i].rq_nvec = old_rq[i - 1].rq_nvec;
3019
3020                 orig_len += smb_rqst_len(server, &old_rq[i - 1]);
3021
3022                 for (j = 0; j < npages; j++) {
3023                         pages[j] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
3024                         if (!pages[j])
3025                                 goto err_free;
3026                 }
3027
3028                 /* copy pages form the old */
3029                 for (j = 0; j < npages; j++) {
3030                         char *dst, *src;
3031                         unsigned int offset, len;
3032
3033                         rqst_page_get_length(&new_rq[i], j, &len, &offset);
3034
3035                         dst = (char *) kmap(new_rq[i].rq_pages[j]) + offset;
3036                         src = (char *) kmap(old_rq[i - 1].rq_pages[j]) + offset;
3037
3038                         memcpy(dst, src, len);
3039                         kunmap(new_rq[i].rq_pages[j]);
3040                         kunmap(old_rq[i - 1].rq_pages[j]);
3041                 }
3042         }
3043
3044         /* fill the 1st iov with a transform header */
3045         fill_transform_hdr(tr_hdr, orig_len, old_rq);
3046
3047         rc = crypt_message(server, num_rqst, new_rq, 1);
3048         cifs_dbg(FYI, "encrypt message returned %d", rc);
3049         if (rc)
3050                 goto err_free;
3051
3052         return rc;
3053
3054 err_free:
3055         smb3_free_compound_rqst(num_rqst - 1, &new_rq[1]);
3056         return rc;
3057 }
3058
3059 static int
3060 smb3_is_transform_hdr(void *buf)
3061 {
3062         struct smb2_transform_hdr *trhdr = buf;
3063
3064         return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
3065 }
3066
3067 static int
3068 decrypt_raw_data(struct TCP_Server_Info *server, char *buf,
3069                  unsigned int buf_data_size, struct page **pages,
3070                  unsigned int npages, unsigned int page_data_size)
3071 {
3072         struct kvec iov[2];
3073         struct smb_rqst rqst = {NULL};
3074         int rc;
3075
3076         iov[0].iov_base = buf;
3077         iov[0].iov_len = sizeof(struct smb2_transform_hdr);
3078         iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr);
3079         iov[1].iov_len = buf_data_size;
3080
3081         rqst.rq_iov = iov;
3082         rqst.rq_nvec = 2;
3083         rqst.rq_pages = pages;
3084         rqst.rq_npages = npages;
3085         rqst.rq_pagesz = PAGE_SIZE;
3086         rqst.rq_tailsz = (page_data_size % PAGE_SIZE) ? : PAGE_SIZE;
3087
3088         rc = crypt_message(server, 1, &rqst, 0);
3089         cifs_dbg(FYI, "decrypt message returned %d\n", rc);
3090
3091         if (rc)
3092                 return rc;
3093
3094         memmove(buf, iov[1].iov_base, buf_data_size);
3095
3096         server->total_read = buf_data_size + page_data_size;
3097
3098         return rc;
3099 }
3100
3101 static int
3102 read_data_into_pages(struct TCP_Server_Info *server, struct page **pages,
3103                      unsigned int npages, unsigned int len)
3104 {
3105         int i;
3106         int length;
3107
3108         for (i = 0; i < npages; i++) {
3109                 struct page *page = pages[i];
3110                 size_t n;
3111
3112                 n = len;
3113                 if (len >= PAGE_SIZE) {
3114                         /* enough data to fill the page */
3115                         n = PAGE_SIZE;
3116                         len -= n;
3117                 } else {
3118                         zero_user(page, len, PAGE_SIZE - len);
3119                         len = 0;
3120                 }
3121                 length = cifs_read_page_from_socket(server, page, 0, n);
3122                 if (length < 0)
3123                         return length;
3124                 server->total_read += length;
3125         }
3126
3127         return 0;
3128 }
3129
3130 static int
3131 init_read_bvec(struct page **pages, unsigned int npages, unsigned int data_size,
3132                unsigned int cur_off, struct bio_vec **page_vec)
3133 {
3134         struct bio_vec *bvec;
3135         int i;
3136
3137         bvec = kcalloc(npages, sizeof(struct bio_vec), GFP_KERNEL);
3138         if (!bvec)
3139                 return -ENOMEM;
3140
3141         for (i = 0; i < npages; i++) {
3142                 bvec[i].bv_page = pages[i];
3143                 bvec[i].bv_offset = (i == 0) ? cur_off : 0;
3144                 bvec[i].bv_len = min_t(unsigned int, PAGE_SIZE, data_size);
3145                 data_size -= bvec[i].bv_len;
3146         }
3147
3148         if (data_size != 0) {
3149                 cifs_dbg(VFS, "%s: something went wrong\n", __func__);
3150                 kfree(bvec);
3151                 return -EIO;
3152         }
3153
3154         *page_vec = bvec;
3155         return 0;
3156 }
3157
3158 static int
3159 handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid,
3160                  char *buf, unsigned int buf_len, struct page **pages,
3161                  unsigned int npages, unsigned int page_data_size)
3162 {
3163         unsigned int data_offset;
3164         unsigned int data_len;
3165         unsigned int cur_off;
3166         unsigned int cur_page_idx;
3167         unsigned int pad_len;
3168         struct cifs_readdata *rdata = mid->callback_data;
3169         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
3170         struct bio_vec *bvec = NULL;
3171         struct iov_iter iter;
3172         struct kvec iov;
3173         int length;
3174         bool use_rdma_mr = false;
3175
3176         if (shdr->Command != SMB2_READ) {
3177                 cifs_dbg(VFS, "only big read responses are supported\n");
3178                 return -ENOTSUPP;
3179         }
3180
3181         if (server->ops->is_session_expired &&
3182             server->ops->is_session_expired(buf)) {
3183                 cifs_reconnect(server);
3184                 wake_up(&server->response_q);
3185                 return -1;
3186         }
3187
3188         if (server->ops->is_status_pending &&
3189                         server->ops->is_status_pending(buf, server, 0))
3190                 return -1;
3191
3192         rdata->result = server->ops->map_error(buf, false);
3193         if (rdata->result != 0) {
3194                 cifs_dbg(FYI, "%s: server returned error %d\n",
3195                          __func__, rdata->result);
3196                 dequeue_mid(mid, rdata->result);
3197                 return 0;
3198         }
3199
3200         data_offset = server->ops->read_data_offset(buf);
3201 #ifdef CONFIG_CIFS_SMB_DIRECT
3202         use_rdma_mr = rdata->mr;
3203 #endif
3204         data_len = server->ops->read_data_length(buf, use_rdma_mr);
3205
3206         if (data_offset < server->vals->read_rsp_size) {
3207                 /*
3208                  * win2k8 sometimes sends an offset of 0 when the read
3209                  * is beyond the EOF. Treat it as if the data starts just after
3210                  * the header.
3211                  */
3212                 cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n",
3213                          __func__, data_offset);
3214                 data_offset = server->vals->read_rsp_size;
3215         } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) {
3216                 /* data_offset is beyond the end of smallbuf */
3217                 cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n",
3218                          __func__, data_offset);
3219                 rdata->result = -EIO;
3220                 dequeue_mid(mid, rdata->result);
3221                 return 0;
3222         }
3223
3224         pad_len = data_offset - server->vals->read_rsp_size;
3225
3226         if (buf_len <= data_offset) {
3227                 /* read response payload is in pages */
3228                 cur_page_idx = pad_len / PAGE_SIZE;
3229                 cur_off = pad_len % PAGE_SIZE;
3230
3231                 if (cur_page_idx != 0) {
3232                         /* data offset is beyond the 1st page of response */
3233                         cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n",
3234                                  __func__, data_offset);
3235                         rdata->result = -EIO;
3236                         dequeue_mid(mid, rdata->result);
3237                         return 0;
3238                 }
3239
3240                 if (data_len > page_data_size - pad_len) {
3241                         /* data_len is corrupt -- discard frame */
3242                         rdata->result = -EIO;
3243                         dequeue_mid(mid, rdata->result);
3244                         return 0;
3245                 }
3246
3247                 rdata->result = init_read_bvec(pages, npages, page_data_size,
3248                                                cur_off, &bvec);
3249                 if (rdata->result != 0) {
3250                         dequeue_mid(mid, rdata->result);
3251                         return 0;
3252                 }
3253
3254                 iov_iter_bvec(&iter, WRITE, bvec, npages, data_len);
3255         } else if (buf_len >= data_offset + data_len) {
3256                 /* read response payload is in buf */
3257                 WARN_ONCE(npages > 0, "read data can be either in buf or in pages");
3258                 iov.iov_base = buf + data_offset;
3259                 iov.iov_len = data_len;
3260                 iov_iter_kvec(&iter, WRITE, &iov, 1, data_len);
3261         } else {
3262                 /* read response payload cannot be in both buf and pages */
3263                 WARN_ONCE(1, "buf can not contain only a part of read data");
3264                 rdata->result = -EIO;
3265                 dequeue_mid(mid, rdata->result);
3266                 return 0;
3267         }
3268
3269         /* set up first iov for signature check */
3270         rdata->iov[0].iov_base = buf;
3271         rdata->iov[0].iov_len = 4;
3272         rdata->iov[1].iov_base = buf + 4;
3273         rdata->iov[1].iov_len = server->vals->read_rsp_size - 4;
3274         cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n",
3275                  rdata->iov[0].iov_base, server->vals->read_rsp_size);
3276
3277         length = rdata->copy_into_pages(server, rdata, &iter);
3278
3279         kfree(bvec);
3280
3281         if (length < 0)
3282                 return length;
3283
3284         dequeue_mid(mid, false);
3285         return length;
3286 }
3287
3288 static int
3289 receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid)
3290 {
3291         char *buf = server->smallbuf;
3292         struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
3293         unsigned int npages;
3294         struct page **pages;
3295         unsigned int len;
3296         unsigned int buflen = server->pdu_size;
3297         int rc;
3298         int i = 0;
3299
3300         len = min_t(unsigned int, buflen, server->vals->read_rsp_size +
3301                 sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1;
3302
3303         rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len);
3304         if (rc < 0)
3305                 return rc;
3306         server->total_read += rc;
3307
3308         len = le32_to_cpu(tr_hdr->OriginalMessageSize) -
3309                 server->vals->read_rsp_size;
3310         npages = DIV_ROUND_UP(len, PAGE_SIZE);
3311
3312         pages = kmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
3313         if (!pages) {
3314                 rc = -ENOMEM;
3315                 goto discard_data;
3316         }
3317
3318         for (; i < npages; i++) {
3319                 pages[i] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
3320                 if (!pages[i]) {
3321                         rc = -ENOMEM;
3322                         goto discard_data;
3323                 }
3324         }
3325
3326         /* read read data into pages */
3327         rc = read_data_into_pages(server, pages, npages, len);
3328         if (rc)
3329                 goto free_pages;
3330
3331         rc = cifs_discard_remaining_data(server);
3332         if (rc)
3333                 goto free_pages;
3334
3335         rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size,
3336                               pages, npages, len);
3337         if (rc)
3338                 goto free_pages;
3339
3340         *mid = smb2_find_mid(server, buf);
3341         if (*mid == NULL)
3342                 cifs_dbg(FYI, "mid not found\n");
3343         else {
3344                 cifs_dbg(FYI, "mid found\n");
3345                 (*mid)->decrypted = true;
3346                 rc = handle_read_data(server, *mid, buf,
3347                                       server->vals->read_rsp_size,
3348                                       pages, npages, len);
3349         }
3350
3351 free_pages:
3352         for (i = i - 1; i >= 0; i--)
3353                 put_page(pages[i]);
3354         kfree(pages);
3355         return rc;
3356 discard_data:
3357         cifs_discard_remaining_data(server);
3358         goto free_pages;
3359 }
3360
3361 static int
3362 receive_encrypted_standard(struct TCP_Server_Info *server,
3363                            struct mid_q_entry **mids, char **bufs,
3364                            int *num_mids)
3365 {
3366         int ret, length;
3367         char *buf = server->smallbuf;
3368         char *tmpbuf;
3369         struct smb2_sync_hdr *shdr;
3370         unsigned int pdu_length = server->pdu_size;
3371         unsigned int buf_size;
3372         struct mid_q_entry *mid_entry;
3373         int next_is_large;
3374         char *next_buffer = NULL;
3375
3376         *num_mids = 0;
3377
3378         /* switch to large buffer if too big for a small one */
3379         if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE) {
3380                 server->large_buf = true;
3381                 memcpy(server->bigbuf, buf, server->total_read);
3382                 buf = server->bigbuf;
3383         }
3384
3385         /* now read the rest */
3386         length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
3387                                 pdu_length - HEADER_SIZE(server) + 1);
3388         if (length < 0)
3389                 return length;
3390         server->total_read += length;
3391
3392         buf_size = pdu_length - sizeof(struct smb2_transform_hdr);
3393         length = decrypt_raw_data(server, buf, buf_size, NULL, 0, 0);
3394         if (length)
3395                 return length;
3396
3397         next_is_large = server->large_buf;
3398  one_more:
3399         shdr = (struct smb2_sync_hdr *)buf;
3400         if (shdr->NextCommand) {
3401                 if (next_is_large) {
3402                         tmpbuf = server->bigbuf;
3403                         next_buffer = (char *)cifs_buf_get();
3404                 } else {
3405                         tmpbuf = server->smallbuf;
3406                         next_buffer = (char *)cifs_small_buf_get();
3407                 }
3408                 memcpy(next_buffer,
3409                        tmpbuf + le32_to_cpu(shdr->NextCommand),
3410                        pdu_length - le32_to_cpu(shdr->NextCommand));
3411         }
3412
3413         mid_entry = smb2_find_mid(server, buf);
3414         if (mid_entry == NULL)
3415                 cifs_dbg(FYI, "mid not found\n");
3416         else {
3417                 cifs_dbg(FYI, "mid found\n");
3418                 mid_entry->decrypted = true;
3419                 mid_entry->resp_buf_size = server->pdu_size;
3420         }
3421
3422         if (*num_mids >= MAX_COMPOUND) {
3423                 cifs_dbg(VFS, "too many PDUs in compound\n");
3424                 return -1;
3425         }
3426         bufs[*num_mids] = buf;
3427         mids[(*num_mids)++] = mid_entry;
3428
3429         if (mid_entry && mid_entry->handle)
3430                 ret = mid_entry->handle(server, mid_entry);
3431         else
3432                 ret = cifs_handle_standard(server, mid_entry);
3433
3434         if (ret == 0 && shdr->NextCommand) {
3435                 pdu_length -= le32_to_cpu(shdr->NextCommand);
3436                 server->large_buf = next_is_large;
3437                 if (next_is_large)
3438                         server->bigbuf = next_buffer;
3439                 else
3440                         server->smallbuf = next_buffer;
3441
3442                 buf += le32_to_cpu(shdr->NextCommand);
3443                 goto one_more;
3444         }
3445
3446         return ret;
3447 }
3448
3449 static int
3450 smb3_receive_transform(struct TCP_Server_Info *server,
3451                        struct mid_q_entry **mids, char **bufs, int *num_mids)
3452 {
3453         char *buf = server->smallbuf;
3454         unsigned int pdu_length = server->pdu_size;
3455         struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
3456         unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
3457
3458         if (pdu_length < sizeof(struct smb2_transform_hdr) +
3459                                                 sizeof(struct smb2_sync_hdr)) {
3460                 cifs_dbg(VFS, "Transform message is too small (%u)\n",
3461                          pdu_length);
3462                 cifs_reconnect(server);
3463                 wake_up(&server->response_q);
3464                 return -ECONNABORTED;
3465         }
3466
3467         if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) {
3468                 cifs_dbg(VFS, "Transform message is broken\n");
3469                 cifs_reconnect(server);
3470                 wake_up(&server->response_q);
3471                 return -ECONNABORTED;
3472         }
3473
3474         /* TODO: add support for compounds containing READ. */
3475         if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server)) {
3476                 *num_mids = 1;
3477                 return receive_encrypted_read(server, &mids[0]);
3478         }
3479
3480         return receive_encrypted_standard(server, mids, bufs, num_mids);
3481 }
3482
3483 int
3484 smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid)
3485 {
3486         char *buf = server->large_buf ? server->bigbuf : server->smallbuf;
3487
3488         return handle_read_data(server, mid, buf, server->pdu_size,
3489                                 NULL, 0, 0);
3490 }
3491
3492 static int
3493 smb2_next_header(char *buf)
3494 {
3495         struct smb2_sync_hdr *hdr = (struct smb2_sync_hdr *)buf;
3496         struct smb2_transform_hdr *t_hdr = (struct smb2_transform_hdr *)buf;
3497
3498         if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM)
3499                 return sizeof(struct smb2_transform_hdr) +
3500                   le32_to_cpu(t_hdr->OriginalMessageSize);
3501
3502         return le32_to_cpu(hdr->NextCommand);
3503 }
3504
3505 struct smb_version_operations smb20_operations = {
3506         .compare_fids = smb2_compare_fids,
3507         .setup_request = smb2_setup_request,
3508         .setup_async_request = smb2_setup_async_request,
3509         .check_receive = smb2_check_receive,
3510         .add_credits = smb2_add_credits,
3511         .set_credits = smb2_set_credits,
3512         .get_credits_field = smb2_get_credits_field,
3513         .get_credits = smb2_get_credits,
3514         .wait_mtu_credits = cifs_wait_mtu_credits,
3515         .get_next_mid = smb2_get_next_mid,
3516         .read_data_offset = smb2_read_data_offset,
3517         .read_data_length = smb2_read_data_length,
3518         .map_error = map_smb2_to_linux_error,
3519         .find_mid = smb2_find_mid,
3520         .check_message = smb2_check_message,
3521         .dump_detail = smb2_dump_detail,
3522         .clear_stats = smb2_clear_stats,
3523         .print_stats = smb2_print_stats,
3524         .is_oplock_break = smb2_is_valid_oplock_break,
3525         .handle_cancelled_mid = smb2_handle_cancelled_mid,
3526         .downgrade_oplock = smb2_downgrade_oplock,
3527         .need_neg = smb2_need_neg,
3528         .negotiate = smb2_negotiate,
3529         .negotiate_wsize = smb2_negotiate_wsize,
3530         .negotiate_rsize = smb2_negotiate_rsize,
3531         .sess_setup = SMB2_sess_setup,
3532         .logoff = SMB2_logoff,
3533         .tree_connect = SMB2_tcon,
3534         .tree_disconnect = SMB2_tdis,
3535         .qfs_tcon = smb2_qfs_tcon,
3536         .is_path_accessible = smb2_is_path_accessible,
3537         .can_echo = smb2_can_echo,
3538         .echo = SMB2_echo,
3539         .query_path_info = smb2_query_path_info,
3540         .get_srv_inum = smb2_get_srv_inum,
3541         .query_file_info = smb2_query_file_info,
3542         .set_path_size = smb2_set_path_size,
3543         .set_file_size = smb2_set_file_size,
3544         .set_file_info = smb2_set_file_info,
3545         .set_compression = smb2_set_compression,
3546         .mkdir = smb2_mkdir,
3547         .mkdir_setinfo = smb2_mkdir_setinfo,
3548         .rmdir = smb2_rmdir,
3549         .unlink = smb2_unlink,
3550         .rename = smb2_rename_path,
3551         .create_hardlink = smb2_create_hardlink,
3552         .query_symlink = smb2_query_symlink,
3553         .query_mf_symlink = smb3_query_mf_symlink,
3554         .create_mf_symlink = smb3_create_mf_symlink,
3555         .open = smb2_open_file,
3556         .set_fid = smb2_set_fid,
3557         .close = smb2_close_file,
3558         .flush = smb2_flush_file,
3559         .async_readv = smb2_async_readv,
3560         .async_writev = smb2_async_writev,
3561         .sync_read = smb2_sync_read,
3562         .sync_write = smb2_sync_write,
3563         .query_dir_first = smb2_query_dir_first,
3564         .query_dir_next = smb2_query_dir_next,
3565         .close_dir = smb2_close_dir,
3566         .calc_smb_size = smb2_calc_size,
3567         .is_status_pending = smb2_is_status_pending,
3568         .is_session_expired = smb2_is_session_expired,
3569         .oplock_response = smb2_oplock_response,
3570         .queryfs = smb2_queryfs,
3571         .mand_lock = smb2_mand_lock,
3572         .mand_unlock_range = smb2_unlock_range,
3573         .push_mand_locks = smb2_push_mandatory_locks,
3574         .get_lease_key = smb2_get_lease_key,
3575         .set_lease_key = smb2_set_lease_key,
3576         .new_lease_key = smb2_new_lease_key,
3577         .calc_signature = smb2_calc_signature,
3578         .is_read_op = smb2_is_read_op,
3579         .set_oplock_level = smb2_set_oplock_level,
3580         .create_lease_buf = smb2_create_lease_buf,
3581         .parse_lease_buf = smb2_parse_lease_buf,
3582         .copychunk_range = smb2_copychunk_range,
3583         .wp_retry_size = smb2_wp_retry_size,
3584         .dir_needs_close = smb2_dir_needs_close,
3585         .get_dfs_refer = smb2_get_dfs_refer,
3586         .select_sectype = smb2_select_sectype,
3587 #ifdef CONFIG_CIFS_XATTR
3588         .query_all_EAs = smb2_query_eas,
3589         .set_EA = smb2_set_ea,
3590 #endif /* CIFS_XATTR */
3591 #ifdef CONFIG_CIFS_ACL
3592         .get_acl = get_smb2_acl,
3593         .get_acl_by_fid = get_smb2_acl_by_fid,
3594         .set_acl = set_smb2_acl,
3595 #endif /* CIFS_ACL */
3596         .next_header = smb2_next_header,
3597         .ioctl_query_info = smb2_ioctl_query_info,
3598 };
3599
3600 struct smb_version_operations smb21_operations = {
3601         .compare_fids = smb2_compare_fids,
3602         .setup_request = smb2_setup_request,
3603         .setup_async_request = smb2_setup_async_request,
3604         .check_receive = smb2_check_receive,
3605         .add_credits = smb2_add_credits,
3606         .set_credits = smb2_set_credits,
3607         .get_credits_field = smb2_get_credits_field,
3608         .get_credits = smb2_get_credits,
3609         .wait_mtu_credits = smb2_wait_mtu_credits,
3610         .get_next_mid = smb2_get_next_mid,
3611         .read_data_offset = smb2_read_data_offset,
3612         .read_data_length = smb2_read_data_length,
3613         .map_error = map_smb2_to_linux_error,
3614         .find_mid = smb2_find_mid,
3615         .check_message = smb2_check_message,
3616         .dump_detail = smb2_dump_detail,
3617         .clear_stats = smb2_clear_stats,
3618         .print_stats = smb2_print_stats,
3619         .is_oplock_break = smb2_is_valid_oplock_break,
3620         .handle_cancelled_mid = smb2_handle_cancelled_mid,
3621         .downgrade_oplock = smb2_downgrade_oplock,
3622         .need_neg = smb2_need_neg,
3623         .negotiate = smb2_negotiate,
3624         .negotiate_wsize = smb2_negotiate_wsize,
3625         .negotiate_rsize = smb2_negotiate_rsize,
3626         .sess_setup = SMB2_sess_setup,
3627         .logoff = SMB2_logoff,
3628         .tree_connect = SMB2_tcon,
3629         .tree_disconnect = SMB2_tdis,
3630         .qfs_tcon = smb2_qfs_tcon,
3631         .is_path_accessible = smb2_is_path_accessible,
3632         .can_echo = smb2_can_echo,
3633         .echo = SMB2_echo,
3634         .query_path_info = smb2_query_path_info,
3635         .get_srv_inum = smb2_get_srv_inum,
3636         .query_file_info = smb2_query_file_info,
3637         .set_path_size = smb2_set_path_size,
3638         .set_file_size = smb2_set_file_size,
3639         .set_file_info = smb2_set_file_info,
3640         .set_compression = smb2_set_compression,
3641         .mkdir = smb2_mkdir,
3642         .mkdir_setinfo = smb2_mkdir_setinfo,
3643         .rmdir = smb2_rmdir,
3644         .unlink = smb2_unlink,
3645         .rename = smb2_rename_path,
3646         .create_hardlink = smb2_create_hardlink,
3647         .query_symlink = smb2_query_symlink,
3648         .query_mf_symlink = smb3_query_mf_symlink,
3649         .create_mf_symlink = smb3_create_mf_symlink,
3650         .open = smb2_open_file,
3651         .set_fid = smb2_set_fid,
3652         .close = smb2_close_file,
3653         .flush = smb2_flush_file,
3654         .async_readv = smb2_async_readv,
3655         .async_writev = smb2_async_writev,
3656         .sync_read = smb2_sync_read,
3657         .sync_write = smb2_sync_write,
3658         .query_dir_first = smb2_query_dir_first,
3659         .query_dir_next = smb2_query_dir_next,
3660         .close_dir = smb2_close_dir,
3661         .calc_smb_size = smb2_calc_size,
3662         .is_status_pending = smb2_is_status_pending,
3663         .is_session_expired = smb2_is_session_expired,
3664         .oplock_response = smb2_oplock_response,
3665         .queryfs = smb2_queryfs,
3666         .mand_lock = smb2_mand_lock,
3667         .mand_unlock_range = smb2_unlock_range,
3668         .push_mand_locks = smb2_push_mandatory_locks,
3669         .get_lease_key = smb2_get_lease_key,
3670         .set_lease_key = smb2_set_lease_key,
3671         .new_lease_key = smb2_new_lease_key,
3672         .calc_signature = smb2_calc_signature,
3673         .is_read_op = smb21_is_read_op,
3674         .set_oplock_level = smb21_set_oplock_level,
3675         .create_lease_buf = smb2_create_lease_buf,
3676         .parse_lease_buf = smb2_parse_lease_buf,
3677         .copychunk_range = smb2_copychunk_range,
3678         .wp_retry_size = smb2_wp_retry_size,
3679         .dir_needs_close = smb2_dir_needs_close,
3680         .enum_snapshots = smb3_enum_snapshots,
3681         .get_dfs_refer = smb2_get_dfs_refer,
3682         .select_sectype = smb2_select_sectype,
3683 #ifdef CONFIG_CIFS_XATTR
3684         .query_all_EAs = smb2_query_eas,
3685         .set_EA = smb2_set_ea,
3686 #endif /* CIFS_XATTR */
3687 #ifdef CONFIG_CIFS_ACL
3688         .get_acl = get_smb2_acl,
3689         .get_acl_by_fid = get_smb2_acl_by_fid,
3690         .set_acl = set_smb2_acl,
3691 #endif /* CIFS_ACL */
3692         .next_header = smb2_next_header,
3693         .ioctl_query_info = smb2_ioctl_query_info,
3694 };
3695
3696 struct smb_version_operations smb30_operations = {
3697         .compare_fids = smb2_compare_fids,
3698         .setup_request = smb2_setup_request,
3699         .setup_async_request = smb2_setup_async_request,
3700         .check_receive = smb2_check_receive,
3701         .add_credits = smb2_add_credits,
3702         .set_credits = smb2_set_credits,
3703         .get_credits_field = smb2_get_credits_field,
3704         .get_credits = smb2_get_credits,
3705         .wait_mtu_credits = smb2_wait_mtu_credits,
3706         .get_next_mid = smb2_get_next_mid,
3707         .read_data_offset = smb2_read_data_offset,
3708         .read_data_length = smb2_read_data_length,
3709         .map_error = map_smb2_to_linux_error,
3710         .find_mid = smb2_find_mid,
3711         .check_message = smb2_check_message,
3712         .dump_detail = smb2_dump_detail,
3713         .clear_stats = smb2_clear_stats,
3714         .print_stats = smb2_print_stats,
3715         .dump_share_caps = smb2_dump_share_caps,
3716         .is_oplock_break = smb2_is_valid_oplock_break,
3717         .handle_cancelled_mid = smb2_handle_cancelled_mid,
3718         .downgrade_oplock = smb2_downgrade_oplock,
3719         .need_neg = smb2_need_neg,
3720         .negotiate = smb2_negotiate,
3721         .negotiate_wsize = smb3_negotiate_wsize,
3722         .negotiate_rsize = smb3_negotiate_rsize,
3723         .sess_setup = SMB2_sess_setup,
3724         .logoff = SMB2_logoff,
3725         .tree_connect = SMB2_tcon,
3726         .tree_disconnect = SMB2_tdis,
3727         .qfs_tcon = smb3_qfs_tcon,
3728         .is_path_accessible = smb2_is_path_accessible,
3729         .can_echo = smb2_can_echo,
3730         .echo = SMB2_echo,
3731         .query_path_info = smb2_query_path_info,
3732         .get_srv_inum = smb2_get_srv_inum,
3733         .query_file_info = smb2_query_file_info,
3734         .set_path_size = smb2_set_path_size,
3735         .set_file_size = smb2_set_file_size,
3736         .set_file_info = smb2_set_file_info,
3737         .set_compression = smb2_set_compression,
3738         .mkdir = smb2_mkdir,
3739         .mkdir_setinfo = smb2_mkdir_setinfo,
3740         .rmdir = smb2_rmdir,
3741         .unlink = smb2_unlink,
3742         .rename = smb2_rename_path,
3743         .create_hardlink = smb2_create_hardlink,
3744         .query_symlink = smb2_query_symlink,
3745         .query_mf_symlink = smb3_query_mf_symlink,
3746         .create_mf_symlink = smb3_create_mf_symlink,
3747         .open = smb2_open_file,
3748         .set_fid = smb2_set_fid,
3749         .close = smb2_close_file,
3750         .flush = smb2_flush_file,
3751         .async_readv = smb2_async_readv,
3752         .async_writev = smb2_async_writev,
3753         .sync_read = smb2_sync_read,
3754         .sync_write = smb2_sync_write,
3755         .query_dir_first = smb2_query_dir_first,
3756         .query_dir_next = smb2_query_dir_next,
3757         .close_dir = smb2_close_dir,
3758         .calc_smb_size = smb2_calc_size,
3759         .is_status_pending = smb2_is_status_pending,
3760         .is_session_expired = smb2_is_session_expired,
3761         .oplock_response = smb2_oplock_response,
3762         .queryfs = smb2_queryfs,
3763         .mand_lock = smb2_mand_lock,
3764         .mand_unlock_range = smb2_unlock_range,
3765         .push_mand_locks = smb2_push_mandatory_locks,
3766         .get_lease_key = smb2_get_lease_key,
3767         .set_lease_key = smb2_set_lease_key,
3768         .new_lease_key = smb2_new_lease_key,
3769         .generate_signingkey = generate_smb30signingkey,
3770         .calc_signature = smb3_calc_signature,
3771         .set_integrity  = smb3_set_integrity,
3772         .is_read_op = smb21_is_read_op,
3773         .set_oplock_level = smb3_set_oplock_level,
3774         .create_lease_buf = smb3_create_lease_buf,
3775         .parse_lease_buf = smb3_parse_lease_buf,
3776         .copychunk_range = smb2_copychunk_range,
3777         .duplicate_extents = smb2_duplicate_extents,
3778         .validate_negotiate = smb3_validate_negotiate,
3779         .wp_retry_size = smb2_wp_retry_size,
3780         .dir_needs_close = smb2_dir_needs_close,
3781         .fallocate = smb3_fallocate,
3782         .enum_snapshots = smb3_enum_snapshots,
3783         .init_transform_rq = smb3_init_transform_rq,
3784         .is_transform_hdr = smb3_is_transform_hdr,
3785         .receive_transform = smb3_receive_transform,
3786         .get_dfs_refer = smb2_get_dfs_refer,
3787         .select_sectype = smb2_select_sectype,
3788 #ifdef CONFIG_CIFS_XATTR
3789         .query_all_EAs = smb2_query_eas,
3790         .set_EA = smb2_set_ea,
3791 #endif /* CIFS_XATTR */
3792 #ifdef CONFIG_CIFS_ACL
3793         .get_acl = get_smb2_acl,
3794         .get_acl_by_fid = get_smb2_acl_by_fid,
3795         .set_acl = set_smb2_acl,
3796 #endif /* CIFS_ACL */
3797         .next_header = smb2_next_header,
3798         .ioctl_query_info = smb2_ioctl_query_info,
3799 };
3800
3801 struct smb_version_operations smb311_operations = {
3802         .compare_fids = smb2_compare_fids,
3803         .setup_request = smb2_setup_request,
3804         .setup_async_request = smb2_setup_async_request,
3805         .check_receive = smb2_check_receive,
3806         .add_credits = smb2_add_credits,
3807         .set_credits = smb2_set_credits,
3808         .get_credits_field = smb2_get_credits_field,
3809         .get_credits = smb2_get_credits,
3810         .wait_mtu_credits = smb2_wait_mtu_credits,
3811         .get_next_mid = smb2_get_next_mid,
3812         .read_data_offset = smb2_read_data_offset,
3813         .read_data_length = smb2_read_data_length,
3814         .map_error = map_smb2_to_linux_error,
3815         .find_mid = smb2_find_mid,
3816         .check_message = smb2_check_message,
3817         .dump_detail = smb2_dump_detail,
3818         .clear_stats = smb2_clear_stats,
3819         .print_stats = smb2_print_stats,
3820         .dump_share_caps = smb2_dump_share_caps,
3821         .is_oplock_break = smb2_is_valid_oplock_break,
3822         .handle_cancelled_mid = smb2_handle_cancelled_mid,
3823         .downgrade_oplock = smb2_downgrade_oplock,
3824         .need_neg = smb2_need_neg,
3825         .negotiate = smb2_negotiate,
3826         .negotiate_wsize = smb3_negotiate_wsize,
3827         .negotiate_rsize = smb3_negotiate_rsize,
3828         .sess_setup = SMB2_sess_setup,
3829         .logoff = SMB2_logoff,
3830         .tree_connect = SMB2_tcon,
3831         .tree_disconnect = SMB2_tdis,
3832         .qfs_tcon = smb3_qfs_tcon,
3833         .is_path_accessible = smb2_is_path_accessible,
3834         .can_echo = smb2_can_echo,
3835         .echo = SMB2_echo,
3836         .query_path_info = smb2_query_path_info,
3837         .get_srv_inum = smb2_get_srv_inum,
3838         .query_file_info = smb2_query_file_info,
3839         .set_path_size = smb2_set_path_size,
3840         .set_file_size = smb2_set_file_size,
3841         .set_file_info = smb2_set_file_info,
3842         .set_compression = smb2_set_compression,
3843         .mkdir = smb2_mkdir,
3844         .mkdir_setinfo = smb2_mkdir_setinfo,
3845         .posix_mkdir = smb311_posix_mkdir,
3846         .rmdir = smb2_rmdir,
3847         .unlink = smb2_unlink,
3848         .rename = smb2_rename_path,
3849         .create_hardlink = smb2_create_hardlink,
3850         .query_symlink = smb2_query_symlink,
3851         .query_mf_symlink = smb3_query_mf_symlink,
3852         .create_mf_symlink = smb3_create_mf_symlink,
3853         .open = smb2_open_file,
3854         .set_fid = smb2_set_fid,
3855         .close = smb2_close_file,
3856         .flush = smb2_flush_file,
3857         .async_readv = smb2_async_readv,
3858         .async_writev = smb2_async_writev,
3859         .sync_read = smb2_sync_read,
3860         .sync_write = smb2_sync_write,
3861         .query_dir_first = smb2_query_dir_first,
3862         .query_dir_next = smb2_query_dir_next,
3863         .close_dir = smb2_close_dir,
3864         .calc_smb_size = smb2_calc_size,
3865         .is_status_pending = smb2_is_status_pending,
3866         .is_session_expired = smb2_is_session_expired,
3867         .oplock_response = smb2_oplock_response,
3868         .queryfs = smb311_queryfs,
3869         .mand_lock = smb2_mand_lock,
3870         .mand_unlock_range = smb2_unlock_range,
3871         .push_mand_locks = smb2_push_mandatory_locks,
3872         .get_lease_key = smb2_get_lease_key,
3873         .set_lease_key = smb2_set_lease_key,
3874         .new_lease_key = smb2_new_lease_key,
3875         .generate_signingkey = generate_smb311signingkey,
3876         .calc_signature = smb3_calc_signature,
3877         .set_integrity  = smb3_set_integrity,
3878         .is_read_op = smb21_is_read_op,
3879         .set_oplock_level = smb3_set_oplock_level,
3880         .create_lease_buf = smb3_create_lease_buf,
3881         .parse_lease_buf = smb3_parse_lease_buf,
3882         .copychunk_range = smb2_copychunk_range,
3883         .duplicate_extents = smb2_duplicate_extents,
3884 /*      .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
3885         .wp_retry_size = smb2_wp_retry_size,
3886         .dir_needs_close = smb2_dir_needs_close,
3887         .fallocate = smb3_fallocate,
3888         .enum_snapshots = smb3_enum_snapshots,
3889         .init_transform_rq = smb3_init_transform_rq,
3890         .is_transform_hdr = smb3_is_transform_hdr,
3891         .receive_transform = smb3_receive_transform,
3892         .get_dfs_refer = smb2_get_dfs_refer,
3893         .select_sectype = smb2_select_sectype,
3894 #ifdef CONFIG_CIFS_XATTR
3895         .query_all_EAs = smb2_query_eas,
3896         .set_EA = smb2_set_ea,
3897 #endif /* CIFS_XATTR */
3898 #ifdef CONFIG_CIFS_ACL
3899         .get_acl = get_smb2_acl,
3900         .get_acl_by_fid = get_smb2_acl_by_fid,
3901         .set_acl = set_smb2_acl,
3902 #endif /* CIFS_ACL */
3903         .next_header = smb2_next_header,
3904         .ioctl_query_info = smb2_ioctl_query_info,
3905 };
3906
3907 struct smb_version_values smb20_values = {
3908         .version_string = SMB20_VERSION_STRING,
3909         .protocol_id = SMB20_PROT_ID,
3910         .req_capabilities = 0, /* MBZ */
3911         .large_lock_type = 0,
3912         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3913         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3914         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3915         .header_size = sizeof(struct smb2_sync_hdr),
3916         .header_preamble_size = 0,
3917         .max_header_size = MAX_SMB2_HDR_SIZE,
3918         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3919         .lock_cmd = SMB2_LOCK,
3920         .cap_unix = 0,
3921         .cap_nt_find = SMB2_NT_FIND,
3922         .cap_large_files = SMB2_LARGE_FILES,
3923         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3924         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3925         .create_lease_size = sizeof(struct create_lease),
3926 };
3927
3928 struct smb_version_values smb21_values = {
3929         .version_string = SMB21_VERSION_STRING,
3930         .protocol_id = SMB21_PROT_ID,
3931         .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
3932         .large_lock_type = 0,
3933         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3934         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3935         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3936         .header_size = sizeof(struct smb2_sync_hdr),
3937         .header_preamble_size = 0,
3938         .max_header_size = MAX_SMB2_HDR_SIZE,
3939         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3940         .lock_cmd = SMB2_LOCK,
3941         .cap_unix = 0,
3942         .cap_nt_find = SMB2_NT_FIND,
3943         .cap_large_files = SMB2_LARGE_FILES,
3944         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3945         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3946         .create_lease_size = sizeof(struct create_lease),
3947 };
3948
3949 struct smb_version_values smb3any_values = {
3950         .version_string = SMB3ANY_VERSION_STRING,
3951         .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
3952         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
3953         .large_lock_type = 0,
3954         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3955         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3956         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3957         .header_size = sizeof(struct smb2_sync_hdr),
3958         .header_preamble_size = 0,
3959         .max_header_size = MAX_SMB2_HDR_SIZE,
3960         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3961         .lock_cmd = SMB2_LOCK,
3962         .cap_unix = 0,
3963         .cap_nt_find = SMB2_NT_FIND,
3964         .cap_large_files = SMB2_LARGE_FILES,
3965         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3966         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3967         .create_lease_size = sizeof(struct create_lease_v2),
3968 };
3969
3970 struct smb_version_values smbdefault_values = {
3971         .version_string = SMBDEFAULT_VERSION_STRING,
3972         .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
3973         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
3974         .large_lock_type = 0,
3975         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3976         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3977         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3978         .header_size = sizeof(struct smb2_sync_hdr),
3979         .header_preamble_size = 0,
3980         .max_header_size = MAX_SMB2_HDR_SIZE,
3981         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3982         .lock_cmd = SMB2_LOCK,
3983         .cap_unix = 0,
3984         .cap_nt_find = SMB2_NT_FIND,
3985         .cap_large_files = SMB2_LARGE_FILES,
3986         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3987         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3988         .create_lease_size = sizeof(struct create_lease_v2),
3989 };
3990
3991 struct smb_version_values smb30_values = {
3992         .version_string = SMB30_VERSION_STRING,
3993         .protocol_id = SMB30_PROT_ID,
3994         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
3995         .large_lock_type = 0,
3996         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3997         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3998         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3999         .header_size = sizeof(struct smb2_sync_hdr),
4000         .header_preamble_size = 0,
4001         .max_header_size = MAX_SMB2_HDR_SIZE,
4002         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
4003         .lock_cmd = SMB2_LOCK,
4004         .cap_unix = 0,
4005         .cap_nt_find = SMB2_NT_FIND,
4006         .cap_large_files = SMB2_LARGE_FILES,
4007         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
4008         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
4009         .create_lease_size = sizeof(struct create_lease_v2),
4010 };
4011
4012 struct smb_version_values smb302_values = {
4013         .version_string = SMB302_VERSION_STRING,
4014         .protocol_id = SMB302_PROT_ID,
4015         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
4016         .large_lock_type = 0,
4017         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
4018         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
4019         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
4020         .header_size = sizeof(struct smb2_sync_hdr),
4021         .header_preamble_size = 0,
4022         .max_header_size = MAX_SMB2_HDR_SIZE,
4023         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
4024         .lock_cmd = SMB2_LOCK,
4025         .cap_unix = 0,
4026         .cap_nt_find = SMB2_NT_FIND,
4027         .cap_large_files = SMB2_LARGE_FILES,
4028         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
4029         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
4030         .create_lease_size = sizeof(struct create_lease_v2),
4031 };
4032
4033 struct smb_version_values smb311_values = {
4034         .version_string = SMB311_VERSION_STRING,
4035         .protocol_id = SMB311_PROT_ID,
4036         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
4037         .large_lock_type = 0,
4038         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
4039         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
4040         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
4041         .header_size = sizeof(struct smb2_sync_hdr),
4042         .header_preamble_size = 0,
4043         .max_header_size = MAX_SMB2_HDR_SIZE,
4044         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
4045         .lock_cmd = SMB2_LOCK,
4046         .cap_unix = 0,
4047         .cap_nt_find = SMB2_NT_FIND,
4048         .cap_large_files = SMB2_LARGE_FILES,
4049         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
4050         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
4051         .create_lease_size = sizeof(struct create_lease_v2),
4052 };