fs/cifs/smb2ops.c

   1 /*
   2  *  SMB2 version specific operations
   3  *
   4  *  Copyright (c) 2012, Jeff Layton <jlayton@redhat.com>
   5  *
   6  *  This library is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License v2 as published
   8  *  by the Free Software Foundation.
   9  *
  10  *  This library is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
  13  *  the GNU Lesser General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU Lesser General Public License
  16  *  along with this library; if not, write to the Free Software
  17  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  18  */
  19
  20 #include <linux/pagemap.h>
  21 #include <linux/vfs.h>
  22 #include <linux/falloc.h>
  23 #include <linux/scatterlist.h>
  24 #include <linux/uuid.h>
  25 #include <crypto/aead.h>
  26 #include "cifsglob.h"
  27 #include "smb2pdu.h"
  28 #include "smb2proto.h"
  29 #include "cifsproto.h"
  30 #include "cifs_debug.h"
  31 #include "cifs_unicode.h"
  32 #include "smb2status.h"
  33 #include "smb2glob.h"
  34 #include "cifs_ioctl.h"
  35 #include "smbdirect.h"
  36
  37 static int
  38 change_conf(struct TCP_Server_Info *server)
  39 {
  40         server->credits += server->echo_credits + server->oplock_credits;
  41         server->oplock_credits = server->echo_credits = 0;
  42         switch (server->credits) {
  43         case 0:
  44                 return -1;
  45         case 1:
  46                 server->echoes = false;
  47                 server->oplocks = false;
  48                 cifs_dbg(VFS, "disabling echoes and oplocks\n");
  49                 break;
  50         case 2:
  51                 server->echoes = true;
  52                 server->oplocks = false;
  53                 server->echo_credits = 1;
  54                 cifs_dbg(FYI, "disabling oplocks\n");
  55                 break;
  56         default:
  57                 server->echoes = true;
  58                 if (enable_oplocks) {
  59                         server->oplocks = true;
  60                         server->oplock_credits = 1;
  61                 } else
  62                         server->oplocks = false;
  63
  64                 server->echo_credits = 1;
  65         }
  66         server->credits -= server->echo_credits + server->oplock_credits;
  67         return 0;
  68 }
  69
  70 static void
  71 smb2_add_credits(struct TCP_Server_Info *server, const unsigned int add,
  72                  const int optype)
  73 {
  74         int *val, rc = 0;
  75         spin_lock(&server->req_lock);
  76         val = server->ops->get_credits_field(server, optype);
  77         *val += add;
  78         if (*val > 65000) {
  79                 *val = 65000; /* Don't get near 64K credits, avoid srv bugs */
  80                 printk_once(KERN_WARNING "server overflowed SMB3 credits\n");
  81         }
  82         server->in_flight--;
  83         if (server->in_flight == 0 && (optype & CIFS_OP_MASK) != CIFS_NEG_OP)
  84                 rc = change_conf(server);
  85         /*
  86          * Sometimes server returns 0 credits on oplock break ack - we need to
  87          * rebalance credits in this case.
  88          */
  89         else if (server->in_flight > 0 && server->oplock_credits == 0 &&
  90                  server->oplocks) {
  91                 if (server->credits > 1) {
  92                         server->credits--;
  93                         server->oplock_credits++;
  94                 }
  95         }
  96         spin_unlock(&server->req_lock);
  97         wake_up(&server->request_q);
  98         if (rc)
  99                 cifs_reconnect(server);
 100 }
 101
 102 static void
 103 smb2_set_credits(struct TCP_Server_Info *server, const int val)
 104 {
 105         spin_lock(&server->req_lock);
 106         server->credits = val;
 107         spin_unlock(&server->req_lock);
 108 }
 109
 110 static int *
 111 smb2_get_credits_field(struct TCP_Server_Info *server, const int optype)
 112 {
 113         switch (optype) {
 114         case CIFS_ECHO_OP:
 115                 return &server->echo_credits;
 116         case CIFS_OBREAK_OP:
 117                 return &server->oplock_credits;
 118         default:
 119                 return &server->credits;
 120         }
 121 }
 122
 123 static unsigned int
 124 smb2_get_credits(struct mid_q_entry *mid)
 125 {
 126         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)mid->resp_buf;
 127
 128         return le16_to_cpu(shdr->CreditRequest);
 129 }
 130
 131 static int
 132 smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size,
 133                       unsigned int *num, unsigned int *credits)
 134 {
 135         int rc = 0;
 136         unsigned int scredits;
 137
 138         spin_lock(&server->req_lock);
 139         while (1) {
 140                 if (server->credits <= 0) {
 141                         spin_unlock(&server->req_lock);
 142                         cifs_num_waiters_inc(server);
 143                         rc = wait_event_killable(server->request_q,
 144                                         has_credits(server, &server->credits));
 145                         cifs_num_waiters_dec(server);
 146                         if (rc)
 147                                 return rc;
 148                         spin_lock(&server->req_lock);
 149                 } else {
 150                         if (server->tcpStatus == CifsExiting) {
 151                                 spin_unlock(&server->req_lock);
 152                                 return -ENOENT;
 153                         }
 154
 155                         scredits = server->credits;
 156                         /* can deadlock with reopen */
 157                         if (scredits == 1) {
 158                                 *num = SMB2_MAX_BUFFER_SIZE;
 159                                 *credits = 0;
 160                                 break;
 161                         }
 162
 163                         /* leave one credit for a possible reopen */
 164                         scredits--;
 165                         *num = min_t(unsigned int, size,
 166                                      scredits * SMB2_MAX_BUFFER_SIZE);
 167
 168                         *credits = DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE);
 169                         server->credits -= *credits;
 170                         server->in_flight++;
 171                         break;
 172                 }
 173         }
 174         spin_unlock(&server->req_lock);
 175         return rc;
 176 }
 177
 178 static __u64
 179 smb2_get_next_mid(struct TCP_Server_Info *server)
 180 {
 181         __u64 mid;
 182         /* for SMB2 we need the current value */
 183         spin_lock(&GlobalMid_Lock);
 184         mid = server->CurrentMid++;
 185         spin_unlock(&GlobalMid_Lock);
 186         return mid;
 187 }
 188
 189 static struct mid_q_entry *
 190 smb2_find_mid(struct TCP_Server_Info *server, char *buf)
 191 {
 192         struct mid_q_entry *mid;
 193         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
 194         __u64 wire_mid = le64_to_cpu(shdr->MessageId);
 195
 196         if (shdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {
 197                 cifs_dbg(VFS, "encrypted frame parsing not supported yet");
 198                 return NULL;
 199         }
 200
 201         spin_lock(&GlobalMid_Lock);
 202         list_for_each_entry(mid, &server->pending_mid_q, qhead) {
 203                 if ((mid->mid == wire_mid) &&
 204                     (mid->mid_state == MID_REQUEST_SUBMITTED) &&
 205                     (mid->command == shdr->Command)) {
 206                         spin_unlock(&GlobalMid_Lock);
 207                         return mid;
 208                 }
 209         }
 210         spin_unlock(&GlobalMid_Lock);
 211         return NULL;
 212 }
 213
 214 static void
 215 smb2_dump_detail(void *buf, struct TCP_Server_Info *server)
 216 {
 217 #ifdef CONFIG_CIFS_DEBUG2
 218         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
 219
 220         cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
 221                  shdr->Command, shdr->Status, shdr->Flags, shdr->MessageId,
 222                  shdr->ProcessId);
 223         cifs_dbg(VFS, "smb buf %p len %u\n", buf,
 224                  server->ops->calc_smb_size(buf, server));
 225 #endif
 226 }
 227
 228 static bool
 229 smb2_need_neg(struct TCP_Server_Info *server)
 230 {
 231         return server->max_read == 0;
 232 }
 233
 234 static int
 235 smb2_negotiate(const unsigned int xid, struct cifs_ses *ses)
 236 {
 237         int rc;
 238         ses->server->CurrentMid = 0;
 239         rc = SMB2_negotiate(xid, ses);
 240         /* BB we probably don't need to retry with modern servers */
 241         if (rc == -EAGAIN)
 242                 rc = -EHOSTDOWN;
 243         return rc;
 244 }
 245
 246 static unsigned int
 247 smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 248 {
 249         struct TCP_Server_Info *server = tcon->ses->server;
 250         unsigned int wsize;
 251
 252         /* start with specified wsize, or default */
 253         wsize = volume_info->wsize ? volume_info->wsize : CIFS_DEFAULT_IOSIZE;
 254         wsize = min_t(unsigned int, wsize, server->max_write);
 255 #ifdef CONFIG_CIFS_SMB_DIRECT
 256         if (server->rdma) {
 257                 if (server->sign)
 258                         wsize = min_t(unsigned int,
 259                                 wsize, server->smbd_conn->max_fragmented_send_size);
 260                 else
 261                         wsize = min_t(unsigned int,
 262                                 wsize, server->smbd_conn->max_readwrite_size);
 263         }
 264 #endif
 265         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 266                 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
 267
 268         return wsize;
 269 }
 270
 271 static unsigned int
 272 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 273 {
 274         struct TCP_Server_Info *server = tcon->ses->server;
 275         unsigned int rsize;
 276
 277         /* start with specified rsize, or default */
 278         rsize = volume_info->rsize ? volume_info->rsize : CIFS_DEFAULT_IOSIZE;
 279         rsize = min_t(unsigned int, rsize, server->max_read);
 280 #ifdef CONFIG_CIFS_SMB_DIRECT
 281         if (server->rdma) {
 282                 if (server->sign)
 283                         rsize = min_t(unsigned int,
 284                                 rsize, server->smbd_conn->max_fragmented_recv_size);
 285                 else
 286                         rsize = min_t(unsigned int,
 287                                 rsize, server->smbd_conn->max_readwrite_size);
 288         }
 289 #endif
 290
 291         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 292                 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
 293
 294         return rsize;
 295 }
 296
 297
 298 static int
 299 parse_server_interfaces(struct network_interface_info_ioctl_rsp *buf,
 300                         size_t buf_len,
 301                         struct cifs_server_iface **iface_list,
 302                         size_t *iface_count)
 303 {
 304         struct network_interface_info_ioctl_rsp *p;
 305         struct sockaddr_in *addr4;
 306         struct sockaddr_in6 *addr6;
 307         struct iface_info_ipv4 *p4;
 308         struct iface_info_ipv6 *p6;
 309         struct cifs_server_iface *info;
 310         ssize_t bytes_left;
 311         size_t next = 0;
 312         int nb_iface = 0;
 313         int rc = 0;
 314
 315         *iface_list = NULL;
 316         *iface_count = 0;
 317
 318         /*
 319          * Fist pass: count and sanity check
 320          */
 321
 322         bytes_left = buf_len;
 323         p = buf;
 324         while (bytes_left >= sizeof(*p)) {
 325                 nb_iface++;
 326                 next = le32_to_cpu(p->Next);
 327                 if (!next) {
 328                         bytes_left -= sizeof(*p);
 329                         break;
 330                 }
 331                 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next);
 332                 bytes_left -= next;
 333         }
 334
 335         if (!nb_iface) {
 336                 cifs_dbg(VFS, "%s: malformed interface info\n", __func__);
 337                 rc = -EINVAL;
 338                 goto out;
 339         }
 340
 341         if (bytes_left || p->Next)
 342                 cifs_dbg(VFS, "%s: incomplete interface info\n", __func__);
 343
 344
 345         /*
 346          * Second pass: extract info to internal structure
 347          */
 348
 349         *iface_list = kcalloc(nb_iface, sizeof(**iface_list), GFP_KERNEL);
 350         if (!*iface_list) {
 351                 rc = -ENOMEM;
 352                 goto out;
 353         }
 354
 355         info = *iface_list;
 356         bytes_left = buf_len;
 357         p = buf;
 358         while (bytes_left >= sizeof(*p)) {
 359                 info->speed = le64_to_cpu(p->LinkSpeed);
 360                 info->rdma_capable = le32_to_cpu(p->Capability & RDMA_CAPABLE);
 361                 info->rss_capable = le32_to_cpu(p->Capability & RSS_CAPABLE);
 362
 363                 cifs_dbg(FYI, "%s: adding iface %zu\n", __func__, *iface_count);
 364                 cifs_dbg(FYI, "%s: speed %zu bps\n", __func__, info->speed);
 365                 cifs_dbg(FYI, "%s: capabilities 0x%08x\n", __func__,
 366                          le32_to_cpu(p->Capability));
 367
 368                 switch (p->Family) {
 369                 /*
 370                  * The kernel and wire socket structures have the same
 371                  * layout and use network byte order but make the
 372                  * conversion explicit in case either one changes.
 373                  */
 374                 case INTERNETWORK:
 375                         addr4 = (struct sockaddr_in *)&info->sockaddr;
 376                         p4 = (struct iface_info_ipv4 *)p->Buffer;
 377                         addr4->sin_family = AF_INET;
 378                         memcpy(&addr4->sin_addr, &p4->IPv4Address, 4);
 379
 380                         /* [MS-SMB2] 2.2.32.5.1.1 Clients MUST ignore these */
 381                         addr4->sin_port = cpu_to_be16(CIFS_PORT);
 382
 383                         cifs_dbg(FYI, "%s: ipv4 %pI4\n", __func__,
 384                                  &addr4->sin_addr);
 385                         break;
 386                 case INTERNETWORKV6:
 387                         addr6 = (struct sockaddr_in6 *)&info->sockaddr;
 388                         p6 = (struct iface_info_ipv6 *)p->Buffer;
 389                         addr6->sin6_family = AF_INET6;
 390                         memcpy(&addr6->sin6_addr, &p6->IPv6Address, 16);
 391
 392                         /* [MS-SMB2] 2.2.32.5.1.2 Clients MUST ignore these */
 393                         addr6->sin6_flowinfo = 0;
 394                         addr6->sin6_scope_id = 0;
 395                         addr6->sin6_port = cpu_to_be16(CIFS_PORT);
 396
 397                         cifs_dbg(FYI, "%s: ipv6 %pI6\n", __func__,
 398                                  &addr6->sin6_addr);
 399                         break;
 400                 default:
 401                         cifs_dbg(VFS,
 402                                  "%s: skipping unsupported socket family\n",
 403                                  __func__);
 404                         goto next_iface;
 405                 }
 406
 407                 (*iface_count)++;
 408                 info++;
 409 next_iface:
 410                 next = le32_to_cpu(p->Next);
 411                 if (!next)
 412                         break;
 413                 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next);
 414                 bytes_left -= next;
 415         }
 416
 417         if (!*iface_count) {
 418                 rc = -EINVAL;
 419                 goto out;
 420         }
 421
 422 out:
 423         if (rc) {
 424                 kfree(*iface_list);
 425                 *iface_count = 0;
 426                 *iface_list = NULL;
 427         }
 428         return rc;
 429 }
 430
 431
 432 static int
 433 SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon)
 434 {
 435         int rc;
 436         unsigned int ret_data_len = 0;
 437         struct network_interface_info_ioctl_rsp *out_buf = NULL;
 438         struct cifs_server_iface *iface_list;
 439         size_t iface_count;
 440         struct cifs_ses *ses = tcon->ses;
 441
 442         rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
 443                         FSCTL_QUERY_NETWORK_INTERFACE_INFO, true /* is_fsctl */,
 444                         NULL /* no data input */, 0 /* no data input */,
 445                         (char **)&out_buf, &ret_data_len);
 446         if (rc != 0) {
 447                 cifs_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
 448                 goto out;
 449         }
 450
 451         rc = parse_server_interfaces(out_buf, ret_data_len,
 452                                      &iface_list, &iface_count);
 453         if (rc)
 454                 goto out;
 455
 456         spin_lock(&ses->iface_lock);
 457         kfree(ses->iface_list);
 458         ses->iface_list = iface_list;
 459         ses->iface_count = iface_count;
 460         ses->iface_last_update = jiffies;
 461         spin_unlock(&ses->iface_lock);
 462
 463 out:
 464         kfree(out_buf);
 465         return rc;
 466 }
 467
 468 void
 469 smb2_cached_lease_break(struct work_struct *work)
 470 {
 471         struct cached_fid *cfid = container_of(work,
 472                                 struct cached_fid, lease_break);
 473         mutex_lock(&cfid->fid_mutex);
 474         if (cfid->is_valid) {
 475                 cifs_dbg(FYI, "clear cached root file handle\n");
 476                 SMB2_close(0, cfid->tcon, cfid->fid->persistent_fid,
 477                            cfid->fid->volatile_fid);
 478                 cfid->is_valid = false;
 479         }
 480         mutex_unlock(&cfid->fid_mutex);
 481 }
 482
 483 /*
 484  * Open the directory at the root of a share
 485  */
 486 int open_shroot(unsigned int xid, struct cifs_tcon *tcon, struct cifs_fid *pfid)
 487 {
 488         struct cifs_open_parms oparams;
 489         int rc;
 490         __le16 srch_path = 0; /* Null - since an open of top of share */
 491         u8 oplock = SMB2_OPLOCK_LEVEL_II;
 492
 493         mutex_lock(&tcon->crfid.fid_mutex);
 494         if (tcon->crfid.is_valid) {
 495                 cifs_dbg(FYI, "found a cached root file handle\n");
 496                 memcpy(pfid, tcon->crfid.fid, sizeof(struct cifs_fid));
 497                 mutex_unlock(&tcon->crfid.fid_mutex);
 498                 return 0;
 499         }
 500
 501         oparams.tcon = tcon;
 502         oparams.create_options = 0;
 503         oparams.desired_access = FILE_READ_ATTRIBUTES;
 504         oparams.disposition = FILE_OPEN;
 505         oparams.fid = pfid;
 506         oparams.reconnect = false;
 507
 508         rc = SMB2_open(xid, &oparams, &srch_path, &oplock, NULL, NULL, NULL);
 509         if (rc == 0) {
 510                 memcpy(tcon->crfid.fid, pfid, sizeof(struct cifs_fid));
 511                 tcon->crfid.tcon = tcon;
 512                 tcon->crfid.is_valid = true;
 513         }
 514         mutex_unlock(&tcon->crfid.fid_mutex);
 515         return rc;
 516 }
 517
 518 static void
 519 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
 520 {
 521         int rc;
 522         __le16 srch_path = 0; /* Null - open root of share */
 523         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 524         struct cifs_open_parms oparms;
 525         struct cifs_fid fid;
 526         bool no_cached_open = tcon->nohandlecache;
 527
 528         oparms.tcon = tcon;
 529         oparms.desired_access = FILE_READ_ATTRIBUTES;
 530         oparms.disposition = FILE_OPEN;
 531         oparms.create_options = 0;
 532         oparms.fid = &fid;
 533         oparms.reconnect = false;
 534
 535         if (no_cached_open)
 536                 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
 537                                NULL);
 538         else
 539                 rc = open_shroot(xid, tcon, &fid);
 540
 541         if (rc)
 542                 return;
 543
 544         SMB3_request_interfaces(xid, tcon);
 545
 546         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 547                         FS_ATTRIBUTE_INFORMATION);
 548         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 549                         FS_DEVICE_INFORMATION);
 550         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 551                         FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
 552         if (no_cached_open)
 553                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 554         return;
 555 }
 556
 557 static void
 558 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
 559 {
 560         int rc;
 561         __le16 srch_path = 0; /* Null - open root of share */
 562         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 563         struct cifs_open_parms oparms;
 564         struct cifs_fid fid;
 565
 566         oparms.tcon = tcon;
 567         oparms.desired_access = FILE_READ_ATTRIBUTES;
 568         oparms.disposition = FILE_OPEN;
 569         oparms.create_options = 0;
 570         oparms.fid = &fid;
 571         oparms.reconnect = false;
 572
 573         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, NULL);
 574         if (rc)
 575                 return;
 576
 577         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 578                         FS_ATTRIBUTE_INFORMATION);
 579         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 580                         FS_DEVICE_INFORMATION);
 581         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 582         return;
 583 }
 584
 585 static int
 586 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
 587                         struct cifs_sb_info *cifs_sb, const char *full_path)
 588 {
 589         int rc;
 590         __le16 *utf16_path;
 591         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 592         struct cifs_open_parms oparms;
 593         struct cifs_fid fid;
 594
 595         if ((*full_path == 0) && tcon->crfid.is_valid)
 596                 return 0;
 597
 598         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
 599         if (!utf16_path)
 600                 return -ENOMEM;
 601
 602         oparms.tcon = tcon;
 603         oparms.desired_access = FILE_READ_ATTRIBUTES;
 604         oparms.disposition = FILE_OPEN;
 605         oparms.create_options = 0;
 606         oparms.fid = &fid;
 607         oparms.reconnect = false;
 608
 609         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
 610         if (rc) {
 611                 kfree(utf16_path);
 612                 return rc;
 613         }
 614
 615         rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 616         kfree(utf16_path);
 617         return rc;
 618 }
 619
 620 static int
 621 smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
 622                   struct cifs_sb_info *cifs_sb, const char *full_path,
 623                   u64 *uniqueid, FILE_ALL_INFO *data)
 624 {
 625         *uniqueid = le64_to_cpu(data->IndexNumber);
 626         return 0;
 627 }
 628
 629 static int
 630 smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
 631                      struct cifs_fid *fid, FILE_ALL_INFO *data)
 632 {
 633         int rc;
 634         struct smb2_file_all_info *smb2_data;
 635
 636         smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
 637                             GFP_KERNEL);
 638         if (smb2_data == NULL)
 639                 return -ENOMEM;
 640
 641         rc = SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid,
 642                              smb2_data);
 643         if (!rc)
 644                 move_smb2_info_to_cifs(data, smb2_data);
 645         kfree(smb2_data);
 646         return rc;
 647 }
 648
 649 #ifdef CONFIG_CIFS_XATTR
 650 static ssize_t
 651 move_smb2_ea_to_cifs(char *dst, size_t dst_size,
 652                      struct smb2_file_full_ea_info *src, size_t src_size,
 653                      const unsigned char *ea_name)
 654 {
 655         int rc = 0;
 656         unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0;
 657         char *name, *value;
 658         size_t name_len, value_len, user_name_len;
 659
 660         while (src_size > 0) {
 661                 name = &src->ea_data[0];
 662                 name_len = (size_t)src->ea_name_length;
 663                 value = &src->ea_data[src->ea_name_length + 1];
 664                 value_len = (size_t)le16_to_cpu(src->ea_value_length);
 665
 666                 if (name_len == 0) {
 667                         break;
 668                 }
 669
 670                 if (src_size < 8 + name_len + 1 + value_len) {
 671                         cifs_dbg(FYI, "EA entry goes beyond length of list\n");
 672                         rc = -EIO;
 673                         goto out;
 674                 }
 675
 676                 if (ea_name) {
 677                         if (ea_name_len == name_len &&
 678                             memcmp(ea_name, name, name_len) == 0) {
 679                                 rc = value_len;
 680                                 if (dst_size == 0)
 681                                         goto out;
 682                                 if (dst_size < value_len) {
 683                                         rc = -ERANGE;
 684                                         goto out;
 685                                 }
 686                                 memcpy(dst, value, value_len);
 687                                 goto out;
 688                         }
 689                 } else {
 690                         /* 'user.' plus a terminating null */
 691                         user_name_len = 5 + 1 + name_len;
 692
 693                         rc += user_name_len;
 694
 695                         if (dst_size >= user_name_len) {
 696                                 dst_size -= user_name_len;
 697                                 memcpy(dst, "user.", 5);
 698                                 dst += 5;
 699                                 memcpy(dst, src->ea_data, name_len);
 700                                 dst += name_len;
 701                                 *dst = 0;
 702                                 ++dst;
 703                         } else if (dst_size == 0) {
 704                                 /* skip copy - calc size only */
 705                         } else {
 706                                 /* stop before overrun buffer */
 707                                 rc = -ERANGE;
 708                                 break;
 709                         }
 710                 }
 711
 712                 if (!src->next_entry_offset)
 713                         break;
 714
 715                 if (src_size < le32_to_cpu(src->next_entry_offset)) {
 716                         /* stop before overrun buffer */
 717                         rc = -ERANGE;
 718                         break;
 719                 }
 720                 src_size -= le32_to_cpu(src->next_entry_offset);
 721                 src = (void *)((char *)src +
 722                                le32_to_cpu(src->next_entry_offset));
 723         }
 724
 725         /* didn't find the named attribute */
 726         if (ea_name)
 727                 rc = -ENODATA;
 728
 729 out:
 730         return (ssize_t)rc;
 731 }
 732
 733 static ssize_t
 734 smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon,
 735                const unsigned char *path, const unsigned char *ea_name,
 736                char *ea_data, size_t buf_size,
 737                struct cifs_sb_info *cifs_sb)
 738 {
 739         int rc;
 740         __le16 *utf16_path;
 741         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 742         struct cifs_open_parms oparms;
 743         struct cifs_fid fid;
 744         struct smb2_file_full_ea_info *smb2_data;
 745         int ea_buf_size = SMB2_MIN_EA_BUF;
 746
 747         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
 748         if (!utf16_path)
 749                 return -ENOMEM;
 750
 751         oparms.tcon = tcon;
 752         oparms.desired_access = FILE_READ_EA;
 753         oparms.disposition = FILE_OPEN;
 754         oparms.create_options = 0;
 755         oparms.fid = &fid;
 756         oparms.reconnect = false;
 757
 758         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
 759         kfree(utf16_path);
 760         if (rc) {
 761                 cifs_dbg(FYI, "open failed rc=%d\n", rc);
 762                 return rc;
 763         }
 764
 765         while (1) {
 766                 smb2_data = kzalloc(ea_buf_size, GFP_KERNEL);
 767                 if (smb2_data == NULL) {
 768                         SMB2_close(xid, tcon, fid.persistent_fid,
 769                                    fid.volatile_fid);
 770                         return -ENOMEM;
 771                 }
 772
 773                 rc = SMB2_query_eas(xid, tcon, fid.persistent_fid,
 774                                     fid.volatile_fid,
 775                                     ea_buf_size, smb2_data);
 776
 777                 if (rc != -E2BIG)
 778                         break;
 779
 780                 kfree(smb2_data);
 781                 ea_buf_size <<= 1;
 782
 783                 if (ea_buf_size > SMB2_MAX_EA_BUF) {
 784                         cifs_dbg(VFS, "EA size is too large\n");
 785                         SMB2_close(xid, tcon, fid.persistent_fid,
 786                                    fid.volatile_fid);
 787                         return -ENOMEM;
 788                 }
 789         }
 790
 791         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 792
 793         /*
 794          * If ea_name is NULL (listxattr) and there are no EAs, return 0 as it's
 795          * not an error. Otherwise, the specified ea_name was not found.
 796          */
 797         if (!rc)
 798                 rc = move_smb2_ea_to_cifs(ea_data, buf_size, smb2_data,
 799                                           SMB2_MAX_EA_BUF, ea_name);
 800         else if (!ea_name && rc == -ENODATA)
 801                 rc = 0;
 802
 803         kfree(smb2_data);
 804         return rc;
 805 }
 806
 807
 808 static int
 809 smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
 810             const char *path, const char *ea_name, const void *ea_value,
 811             const __u16 ea_value_len, const struct nls_table *nls_codepage,
 812             struct cifs_sb_info *cifs_sb)
 813 {
 814         int rc;
 815         __le16 *utf16_path;
 816         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 817         struct cifs_open_parms oparms;
 818         struct cifs_fid fid;
 819         struct smb2_file_full_ea_info *ea;
 820         int ea_name_len = strlen(ea_name);
 821         int len;
 822
 823         if (ea_name_len > 255)
 824                 return -EINVAL;
 825
 826         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
 827         if (!utf16_path)
 828                 return -ENOMEM;
 829
 830         oparms.tcon = tcon;
 831         oparms.desired_access = FILE_WRITE_EA;
 832         oparms.disposition = FILE_OPEN;
 833         oparms.create_options = 0;
 834         oparms.fid = &fid;
 835         oparms.reconnect = false;
 836
 837         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
 838         kfree(utf16_path);
 839         if (rc) {
 840                 cifs_dbg(FYI, "open failed rc=%d\n", rc);
 841                 return rc;
 842         }
 843
 844         len = sizeof(ea) + ea_name_len + ea_value_len + 1;
 845         ea = kzalloc(len, GFP_KERNEL);
 846         if (ea == NULL) {
 847                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 848                 return -ENOMEM;
 849         }
 850
 851         ea->ea_name_length = ea_name_len;
 852         ea->ea_value_length = cpu_to_le16(ea_value_len);
 853         memcpy(ea->ea_data, ea_name, ea_name_len + 1);
 854         memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len);
 855
 856         rc = SMB2_set_ea(xid, tcon, fid.persistent_fid, fid.volatile_fid, ea,
 857                          len);
 858         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 859
 860         return rc;
 861 }
 862 #endif
 863
 864 static bool
 865 smb2_can_echo(struct TCP_Server_Info *server)
 866 {
 867         return server->echoes;
 868 }
 869
 870 static void
 871 smb2_clear_stats(struct cifs_tcon *tcon)
 872 {
 873 #ifdef CONFIG_CIFS_STATS
 874         int i;
 875         for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
 876                 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
 877                 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
 878         }
 879 #endif
 880 }
 881
 882 static void
 883 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
 884 {
 885         seq_puts(m, "\n\tShare Capabilities:");
 886         if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
 887                 seq_puts(m, " DFS,");
 888         if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
 889                 seq_puts(m, " CONTINUOUS AVAILABILITY,");
 890         if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
 891                 seq_puts(m, " SCALEOUT,");
 892         if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
 893                 seq_puts(m, " CLUSTER,");
 894         if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
 895                 seq_puts(m, " ASYMMETRIC,");
 896         if (tcon->capabilities == 0)
 897                 seq_puts(m, " None");
 898         if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
 899                 seq_puts(m, " Aligned,");
 900         if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
 901                 seq_puts(m, " Partition Aligned,");
 902         if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
 903                 seq_puts(m, " SSD,");
 904         if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
 905                 seq_puts(m, " TRIM-support,");
 906
 907         seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
 908         seq_printf(m, "\n\ttid: 0x%x", tcon->tid);
 909         if (tcon->perf_sector_size)
 910                 seq_printf(m, "\tOptimal sector size: 0x%x",
 911                            tcon->perf_sector_size);
 912         seq_printf(m, "\tMaximal Access: 0x%x", tcon->maximal_access);
 913 }
 914
 915 static void
 916 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
 917 {
 918 #ifdef CONFIG_CIFS_STATS
 919         atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
 920         atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
 921         seq_printf(m, "\nNegotiates: %d sent %d failed",
 922                    atomic_read(&sent[SMB2_NEGOTIATE_HE]),
 923                    atomic_read(&failed[SMB2_NEGOTIATE_HE]));
 924         seq_printf(m, "\nSessionSetups: %d sent %d failed",
 925                    atomic_read(&sent[SMB2_SESSION_SETUP_HE]),
 926                    atomic_read(&failed[SMB2_SESSION_SETUP_HE]));
 927         seq_printf(m, "\nLogoffs: %d sent %d failed",
 928                    atomic_read(&sent[SMB2_LOGOFF_HE]),
 929                    atomic_read(&failed[SMB2_LOGOFF_HE]));
 930         seq_printf(m, "\nTreeConnects: %d sent %d failed",
 931                    atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
 932                    atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
 933         seq_printf(m, "\nTreeDisconnects: %d sent %d failed",
 934                    atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
 935                    atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
 936         seq_printf(m, "\nCreates: %d sent %d failed",
 937                    atomic_read(&sent[SMB2_CREATE_HE]),
 938                    atomic_read(&failed[SMB2_CREATE_HE]));
 939         seq_printf(m, "\nCloses: %d sent %d failed",
 940                    atomic_read(&sent[SMB2_CLOSE_HE]),
 941                    atomic_read(&failed[SMB2_CLOSE_HE]));
 942         seq_printf(m, "\nFlushes: %d sent %d failed",
 943                    atomic_read(&sent[SMB2_FLUSH_HE]),
 944                    atomic_read(&failed[SMB2_FLUSH_HE]));
 945         seq_printf(m, "\nReads: %d sent %d failed",
 946                    atomic_read(&sent[SMB2_READ_HE]),
 947                    atomic_read(&failed[SMB2_READ_HE]));
 948         seq_printf(m, "\nWrites: %d sent %d failed",
 949                    atomic_read(&sent[SMB2_WRITE_HE]),
 950                    atomic_read(&failed[SMB2_WRITE_HE]));
 951         seq_printf(m, "\nLocks: %d sent %d failed",
 952                    atomic_read(&sent[SMB2_LOCK_HE]),
 953                    atomic_read(&failed[SMB2_LOCK_HE]));
 954         seq_printf(m, "\nIOCTLs: %d sent %d failed",
 955                    atomic_read(&sent[SMB2_IOCTL_HE]),
 956                    atomic_read(&failed[SMB2_IOCTL_HE]));
 957         seq_printf(m, "\nCancels: %d sent %d failed",
 958                    atomic_read(&sent[SMB2_CANCEL_HE]),
 959                    atomic_read(&failed[SMB2_CANCEL_HE]));
 960         seq_printf(m, "\nEchos: %d sent %d failed",
 961                    atomic_read(&sent[SMB2_ECHO_HE]),
 962                    atomic_read(&failed[SMB2_ECHO_HE]));
 963         seq_printf(m, "\nQueryDirectories: %d sent %d failed",
 964                    atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
 965                    atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
 966         seq_printf(m, "\nChangeNotifies: %d sent %d failed",
 967                    atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
 968                    atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
 969         seq_printf(m, "\nQueryInfos: %d sent %d failed",
 970                    atomic_read(&sent[SMB2_QUERY_INFO_HE]),
 971                    atomic_read(&failed[SMB2_QUERY_INFO_HE]));
 972         seq_printf(m, "\nSetInfos: %d sent %d failed",
 973                    atomic_read(&sent[SMB2_SET_INFO_HE]),
 974                    atomic_read(&failed[SMB2_SET_INFO_HE]));
 975         seq_printf(m, "\nOplockBreaks: %d sent %d failed",
 976                    atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
 977                    atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
 978 #endif
 979 }
 980
 981 static void
 982 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
 983 {
 984         struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
 985         struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
 986
 987         cfile->fid.persistent_fid = fid->persistent_fid;
 988         cfile->fid.volatile_fid = fid->volatile_fid;
 989         server->ops->set_oplock_level(cinode, oplock, fid->epoch,
 990                                       &fid->purge_cache);
 991         cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
 992         memcpy(cfile->fid.create_guid, fid->create_guid, 16);
 993 }
 994
 995 static void
 996 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
 997                 struct cifs_fid *fid)
 998 {
 999         SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1000 }
1001
1002 static int
1003 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
1004                      u64 persistent_fid, u64 volatile_fid,
1005                      struct copychunk_ioctl *pcchunk)
1006 {
1007         int rc;
1008         unsigned int ret_data_len;
1009         struct resume_key_req *res_key;
1010
1011         rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
1012                         FSCTL_SRV_REQUEST_RESUME_KEY, true /* is_fsctl */,
1013                         NULL, 0 /* no input */,
1014                         (char **)&res_key, &ret_data_len);
1015
1016         if (rc) {
1017                 cifs_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
1018                 goto req_res_key_exit;
1019         }
1020         if (ret_data_len < sizeof(struct resume_key_req)) {
1021                 cifs_dbg(VFS, "Invalid refcopy resume key length\n");
1022                 rc = -EINVAL;
1023                 goto req_res_key_exit;
1024         }
1025         memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
1026
1027 req_res_key_exit:
1028         kfree(res_key);
1029         return rc;
1030 }
1031
1032 static ssize_t
1033 smb2_copychunk_range(const unsigned int xid,
1034                         struct cifsFileInfo *srcfile,
1035                         struct cifsFileInfo *trgtfile, u64 src_off,
1036                         u64 len, u64 dest_off)
1037 {
1038         int rc;
1039         unsigned int ret_data_len;
1040         struct copychunk_ioctl *pcchunk;
1041         struct copychunk_ioctl_rsp *retbuf = NULL;
1042         struct cifs_tcon *tcon;
1043         int chunks_copied = 0;
1044         bool chunk_sizes_updated = false;
1045         ssize_t bytes_written, total_bytes_written = 0;
1046
1047         pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
1048
1049         if (pcchunk == NULL)
1050                 return -ENOMEM;
1051
1052         cifs_dbg(FYI, "in smb2_copychunk_range - about to call request res key\n");
1053         /* Request a key from the server to identify the source of the copy */
1054         rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
1055                                 srcfile->fid.persistent_fid,
1056                                 srcfile->fid.volatile_fid, pcchunk);
1057
1058         /* Note: request_res_key sets res_key null only if rc !=0 */
1059         if (rc)
1060                 goto cchunk_out;
1061
1062         /* For now array only one chunk long, will make more flexible later */
1063         pcchunk->ChunkCount = cpu_to_le32(1);
1064         pcchunk->Reserved = 0;
1065         pcchunk->Reserved2 = 0;
1066
1067         tcon = tlink_tcon(trgtfile->tlink);
1068
1069         while (len > 0) {
1070                 pcchunk->SourceOffset = cpu_to_le64(src_off);
1071                 pcchunk->TargetOffset = cpu_to_le64(dest_off);
1072                 pcchunk->Length =
1073                         cpu_to_le32(min_t(u32, len, tcon->max_bytes_chunk));
1074
1075                 /* Request server copy to target from src identified by key */
1076                 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1077                         trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
1078                         true /* is_fsctl */, (char *)pcchunk,
1079                         sizeof(struct copychunk_ioctl), (char **)&retbuf,
1080                         &ret_data_len);
1081                 if (rc == 0) {
1082                         if (ret_data_len !=
1083                                         sizeof(struct copychunk_ioctl_rsp)) {
1084                                 cifs_dbg(VFS, "invalid cchunk response size\n");
1085                                 rc = -EIO;
1086                                 goto cchunk_out;
1087                         }
1088                         if (retbuf->TotalBytesWritten == 0) {
1089                                 cifs_dbg(FYI, "no bytes copied\n");
1090                                 rc = -EIO;
1091                                 goto cchunk_out;
1092                         }
1093                         /*
1094                          * Check if server claimed to write more than we asked
1095                          */
1096                         if (le32_to_cpu(retbuf->TotalBytesWritten) >
1097                             le32_to_cpu(pcchunk->Length)) {
1098                                 cifs_dbg(VFS, "invalid copy chunk response\n");
1099                                 rc = -EIO;
1100                                 goto cchunk_out;
1101                         }
1102                         if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
1103                                 cifs_dbg(VFS, "invalid num chunks written\n");
1104                                 rc = -EIO;
1105                                 goto cchunk_out;
1106                         }
1107                         chunks_copied++;
1108
1109                         bytes_written = le32_to_cpu(retbuf->TotalBytesWritten);
1110                         src_off += bytes_written;
1111                         dest_off += bytes_written;
1112                         len -= bytes_written;
1113                         total_bytes_written += bytes_written;
1114
1115                         cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n",
1116                                 le32_to_cpu(retbuf->ChunksWritten),
1117                                 le32_to_cpu(retbuf->ChunkBytesWritten),
1118                                 bytes_written);
1119                 } else if (rc == -EINVAL) {
1120                         if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
1121                                 goto cchunk_out;
1122
1123                         cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
1124                                 le32_to_cpu(retbuf->ChunksWritten),
1125                                 le32_to_cpu(retbuf->ChunkBytesWritten),
1126                                 le32_to_cpu(retbuf->TotalBytesWritten));
1127
1128                         /*
1129                          * Check if this is the first request using these sizes,
1130                          * (ie check if copy succeed once with original sizes
1131                          * and check if the server gave us different sizes after
1132                          * we already updated max sizes on previous request).
1133                          * if not then why is the server returning an error now
1134                          */
1135                         if ((chunks_copied != 0) || chunk_sizes_updated)
1136                                 goto cchunk_out;
1137
1138                         /* Check that server is not asking us to grow size */
1139                         if (le32_to_cpu(retbuf->ChunkBytesWritten) <
1140                                         tcon->max_bytes_chunk)
1141                                 tcon->max_bytes_chunk =
1142                                         le32_to_cpu(retbuf->ChunkBytesWritten);
1143                         else
1144                                 goto cchunk_out; /* server gave us bogus size */
1145
1146                         /* No need to change MaxChunks since already set to 1 */
1147                         chunk_sizes_updated = true;
1148                 } else
1149                         goto cchunk_out;
1150         }
1151
1152 cchunk_out:
1153         kfree(pcchunk);
1154         kfree(retbuf);
1155         if (rc)
1156                 return rc;
1157         else
1158                 return total_bytes_written;
1159 }
1160
1161 static int
1162 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
1163                 struct cifs_fid *fid)
1164 {
1165         return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1166 }
1167
1168 static unsigned int
1169 smb2_read_data_offset(char *buf)
1170 {
1171         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1172         return rsp->DataOffset;
1173 }
1174
1175 static unsigned int
1176 smb2_read_data_length(char *buf, bool in_remaining)
1177 {
1178         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1179
1180         if (in_remaining)
1181                 return le32_to_cpu(rsp->DataRemaining);
1182
1183         return le32_to_cpu(rsp->DataLength);
1184 }
1185
1186
1187 static int
1188 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,
1189                struct cifs_io_parms *parms, unsigned int *bytes_read,
1190                char **buf, int *buf_type)
1191 {
1192         parms->persistent_fid = pfid->persistent_fid;
1193         parms->volatile_fid = pfid->volatile_fid;
1194         return SMB2_read(xid, parms, bytes_read, buf, buf_type);
1195 }
1196
1197 static int
1198 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,
1199                 struct cifs_io_parms *parms, unsigned int *written,
1200                 struct kvec *iov, unsigned long nr_segs)
1201 {
1202
1203         parms->persistent_fid = pfid->persistent_fid;
1204         parms->volatile_fid = pfid->volatile_fid;
1205         return SMB2_write(xid, parms, written, iov, nr_segs);
1206 }
1207
1208 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
1209 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
1210                 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
1211 {
1212         struct cifsInodeInfo *cifsi;
1213         int rc;
1214
1215         cifsi = CIFS_I(inode);
1216
1217         /* if file already sparse don't bother setting sparse again */
1218         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
1219                 return true; /* already sparse */
1220
1221         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
1222                 return true; /* already not sparse */
1223
1224         /*
1225          * Can't check for sparse support on share the usual way via the
1226          * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
1227          * since Samba server doesn't set the flag on the share, yet
1228          * supports the set sparse FSCTL and returns sparse correctly
1229          * in the file attributes. If we fail setting sparse though we
1230          * mark that server does not support sparse files for this share
1231          * to avoid repeatedly sending the unsupported fsctl to server
1232          * if the file is repeatedly extended.
1233          */
1234         if (tcon->broken_sparse_sup)
1235                 return false;
1236
1237         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1238                         cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
1239                         true /* is_fctl */,
1240                         &setsparse, 1, NULL, NULL);
1241         if (rc) {
1242                 tcon->broken_sparse_sup = true;
1243                 cifs_dbg(FYI, "set sparse rc = %d\n", rc);
1244                 return false;
1245         }
1246
1247         if (setsparse)
1248                 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
1249         else
1250                 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
1251
1252         return true;
1253 }
1254
1255 static int
1256 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
1257                    struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
1258 {
1259         __le64 eof = cpu_to_le64(size);
1260         struct inode *inode;
1261
1262         /*
1263          * If extending file more than one page make sparse. Many Linux fs
1264          * make files sparse by default when extending via ftruncate
1265          */
1266         inode = d_inode(cfile->dentry);
1267
1268         if (!set_alloc && (size > inode->i_size + 8192)) {
1269                 __u8 set_sparse = 1;
1270
1271                 /* whether set sparse succeeds or not, extend the file */
1272                 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
1273         }
1274
1275         return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
1276                             cfile->fid.volatile_fid, cfile->pid, &eof, false);
1277 }
1278
1279 static int
1280 smb2_duplicate_extents(const unsigned int xid,
1281                         struct cifsFileInfo *srcfile,
1282                         struct cifsFileInfo *trgtfile, u64 src_off,
1283                         u64 len, u64 dest_off)
1284 {
1285         int rc;
1286         unsigned int ret_data_len;
1287         struct duplicate_extents_to_file dup_ext_buf;
1288         struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink);
1289
1290         /* server fileays advertise duplicate extent support with this flag */
1291         if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) &
1292              FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0)
1293                 return -EOPNOTSUPP;
1294
1295         dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid;
1296         dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid;
1297         dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off);
1298         dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off);
1299         dup_ext_buf.ByteCount = cpu_to_le64(len);
1300         cifs_dbg(FYI, "duplicate extents: src off %lld dst off %lld len %lld",
1301                 src_off, dest_off, len);
1302
1303         rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false);
1304         if (rc)
1305                 goto duplicate_extents_out;
1306
1307         rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1308                         trgtfile->fid.volatile_fid,
1309                         FSCTL_DUPLICATE_EXTENTS_TO_FILE,
1310                         true /* is_fsctl */,
1311                         (char *)&dup_ext_buf,
1312                         sizeof(struct duplicate_extents_to_file),
1313                         NULL,
1314                         &ret_data_len);
1315
1316         if (ret_data_len > 0)
1317                 cifs_dbg(FYI, "non-zero response length in duplicate extents");
1318
1319 duplicate_extents_out:
1320         return rc;
1321 }
1322
1323 static int
1324 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
1325                    struct cifsFileInfo *cfile)
1326 {
1327         return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
1328                             cfile->fid.volatile_fid);
1329 }
1330
1331 static int
1332 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
1333                    struct cifsFileInfo *cfile)
1334 {
1335         struct fsctl_set_integrity_information_req integr_info;
1336         unsigned int ret_data_len;
1337
1338         integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED);
1339         integr_info.Flags = 0;
1340         integr_info.Reserved = 0;
1341
1342         return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1343                         cfile->fid.volatile_fid,
1344                         FSCTL_SET_INTEGRITY_INFORMATION,
1345                         true /* is_fsctl */,
1346                         (char *)&integr_info,
1347                         sizeof(struct fsctl_set_integrity_information_req),
1348                         NULL,
1349                         &ret_data_len);
1350
1351 }
1352
1353 static int
1354 smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon,
1355                    struct cifsFileInfo *cfile, void __user *ioc_buf)
1356 {
1357         char *retbuf = NULL;
1358         unsigned int ret_data_len = 0;
1359         int rc;
1360         struct smb_snapshot_array snapshot_in;
1361
1362         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1363                         cfile->fid.volatile_fid,
1364                         FSCTL_SRV_ENUMERATE_SNAPSHOTS,
1365                         true /* is_fsctl */,
1366                         NULL, 0 /* no input data */,
1367                         (char **)&retbuf,
1368                         &ret_data_len);
1369         cifs_dbg(FYI, "enum snaphots ioctl returned %d and ret buflen is %d\n",
1370                         rc, ret_data_len);
1371         if (rc)
1372                 return rc;
1373
1374         if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) {
1375                 /* Fixup buffer */
1376                 if (copy_from_user(&snapshot_in, ioc_buf,
1377                     sizeof(struct smb_snapshot_array))) {
1378                         rc = -EFAULT;
1379                         kfree(retbuf);
1380                         return rc;
1381                 }
1382                 if (snapshot_in.snapshot_array_size < sizeof(struct smb_snapshot_array)) {
1383                         rc = -ERANGE;
1384                         kfree(retbuf);
1385                         return rc;
1386                 }
1387
1388                 if (ret_data_len > snapshot_in.snapshot_array_size)
1389                         ret_data_len = snapshot_in.snapshot_array_size;
1390
1391                 if (copy_to_user(ioc_buf, retbuf, ret_data_len))
1392                         rc = -EFAULT;
1393         }
1394
1395         kfree(retbuf);
1396         return rc;
1397 }
1398
1399 static int
1400 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
1401                      const char *path, struct cifs_sb_info *cifs_sb,
1402                      struct cifs_fid *fid, __u16 search_flags,
1403                      struct cifs_search_info *srch_inf)
1404 {
1405         __le16 *utf16_path;
1406         int rc;
1407         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1408         struct cifs_open_parms oparms;
1409
1410         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1411         if (!utf16_path)
1412                 return -ENOMEM;
1413
1414         oparms.tcon = tcon;
1415         oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
1416         oparms.disposition = FILE_OPEN;
1417         oparms.create_options = 0;
1418         oparms.fid = fid;
1419         oparms.reconnect = false;
1420
1421         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
1422         kfree(utf16_path);
1423         if (rc) {
1424                 cifs_dbg(FYI, "open dir failed rc=%d\n", rc);
1425                 return rc;
1426         }
1427
1428         srch_inf->entries_in_buffer = 0;
1429         srch_inf->index_of_last_entry = 0;
1430
1431         rc = SMB2_query_directory(xid, tcon, fid->persistent_fid,
1432                                   fid->volatile_fid, 0, srch_inf);
1433         if (rc) {
1434                 cifs_dbg(FYI, "query directory failed rc=%d\n", rc);
1435                 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1436         }
1437         return rc;
1438 }
1439
1440 static int
1441 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
1442                     struct cifs_fid *fid, __u16 search_flags,
1443                     struct cifs_search_info *srch_inf)
1444 {
1445         return SMB2_query_directory(xid, tcon, fid->persistent_fid,
1446                                     fid->volatile_fid, 0, srch_inf);
1447 }
1448
1449 static int
1450 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
1451                struct cifs_fid *fid)
1452 {
1453         return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1454 }
1455
1456 /*
1457 * If we negotiate SMB2 protocol and get STATUS_PENDING - update
1458 * the number of credits and return true. Otherwise - return false.
1459 */
1460 static bool
1461 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server, int length)
1462 {
1463         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
1464
1465         if (shdr->Status != STATUS_PENDING)
1466                 return false;
1467
1468         if (!length) {
1469                 spin_lock(&server->req_lock);
1470                 server->credits += le16_to_cpu(shdr->CreditRequest);
1471                 spin_unlock(&server->req_lock);
1472                 wake_up(&server->request_q);
1473         }
1474
1475         return true;
1476 }
1477
1478 static bool
1479 smb2_is_session_expired(char *buf)
1480 {
1481         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
1482
1483         if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED &&
1484             shdr->Status != STATUS_USER_SESSION_DELETED)
1485                 return false;
1486
1487         cifs_dbg(FYI, "Session expired or deleted\n");
1488         return true;
1489 }
1490
1491 static int
1492 smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
1493                      struct cifsInodeInfo *cinode)
1494 {
1495         if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
1496                 return SMB2_lease_break(0, tcon, cinode->lease_key,
1497                                         smb2_get_lease_state(cinode));
1498
1499         return SMB2_oplock_break(0, tcon, fid->persistent_fid,
1500                                  fid->volatile_fid,
1501                                  CIFS_CACHE_READ(cinode) ? 1 : 0);
1502 }
1503
1504 static int
1505 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
1506              struct kstatfs *buf)
1507 {
1508         int rc;
1509         __le16 srch_path = 0; /* Null - open root of share */
1510         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1511         struct cifs_open_parms oparms;
1512         struct cifs_fid fid;
1513
1514         oparms.tcon = tcon;
1515         oparms.desired_access = FILE_READ_ATTRIBUTES;
1516         oparms.disposition = FILE_OPEN;
1517         oparms.create_options = 0;
1518         oparms.fid = &fid;
1519         oparms.reconnect = false;
1520
1521         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, NULL);
1522         if (rc)
1523                 return rc;
1524         buf->f_type = SMB2_MAGIC_NUMBER;
1525         rc = SMB2_QFS_info(xid, tcon, fid.persistent_fid, fid.volatile_fid,
1526                            buf);
1527         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
1528         return rc;
1529 }
1530
1531 static bool
1532 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
1533 {
1534         return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
1535                ob1->fid.volatile_fid == ob2->fid.volatile_fid;
1536 }
1537
1538 static int
1539 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
1540                __u64 length, __u32 type, int lock, int unlock, bool wait)
1541 {
1542         if (unlock && !lock)
1543                 type = SMB2_LOCKFLAG_UNLOCK;
1544         return SMB2_lock(xid, tlink_tcon(cfile->tlink),
1545                          cfile->fid.persistent_fid, cfile->fid.volatile_fid,
1546                          current->tgid, length, offset, type, wait);
1547 }
1548
1549 static void
1550 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
1551 {
1552         memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
1553 }
1554
1555 static void
1556 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
1557 {
1558         memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
1559 }
1560
1561 static void
1562 smb2_new_lease_key(struct cifs_fid *fid)
1563 {
1564         generate_random_uuid(fid->lease_key);
1565 }
1566
1567 static int
1568 smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,
1569                    const char *search_name,
1570                    struct dfs_info3_param **target_nodes,
1571                    unsigned int *num_of_nodes,
1572                    const struct nls_table *nls_codepage, int remap)
1573 {
1574         int rc;
1575         __le16 *utf16_path = NULL;
1576         int utf16_path_len = 0;
1577         struct cifs_tcon *tcon;
1578         struct fsctl_get_dfs_referral_req *dfs_req = NULL;
1579         struct get_dfs_referral_rsp *dfs_rsp = NULL;
1580         u32 dfs_req_size = 0, dfs_rsp_size = 0;
1581
1582         cifs_dbg(FYI, "smb2_get_dfs_refer path <%s>\n", search_name);
1583
1584         /*
1585          * Try to use the IPC tcon, otherwise just use any
1586          */
1587         tcon = ses->tcon_ipc;
1588         if (tcon == NULL) {
1589                 spin_lock(&cifs_tcp_ses_lock);
1590                 tcon = list_first_entry_or_null(&ses->tcon_list,
1591                                                 struct cifs_tcon,
1592                                                 tcon_list);
1593                 if (tcon)
1594                         tcon->tc_count++;
1595                 spin_unlock(&cifs_tcp_ses_lock);
1596         }
1597
1598         if (tcon == NULL) {
1599                 cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n",
1600                          ses);
1601                 rc = -ENOTCONN;
1602                 goto out;
1603         }
1604
1605         utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX,
1606                                            &utf16_path_len,
1607                                            nls_codepage, remap);
1608         if (!utf16_path) {
1609                 rc = -ENOMEM;
1610                 goto out;
1611         }
1612
1613         dfs_req_size = sizeof(*dfs_req) + utf16_path_len;
1614         dfs_req = kzalloc(dfs_req_size, GFP_KERNEL);
1615         if (!dfs_req) {
1616                 rc = -ENOMEM;
1617                 goto out;
1618         }
1619
1620         /* Highest DFS referral version understood */
1621         dfs_req->MaxReferralLevel = DFS_VERSION;
1622
1623         /* Path to resolve in an UTF-16 null-terminated string */
1624         memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len);
1625
1626         do {
1627                 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
1628                                 FSCTL_DFS_GET_REFERRALS,
1629                                 true /* is_fsctl */,
1630                                 (char *)dfs_req, dfs_req_size,
1631                                 (char **)&dfs_rsp, &dfs_rsp_size);
1632         } while (rc == -EAGAIN);
1633
1634         if (rc) {
1635                 if ((rc != -ENOENT) && (rc != -EOPNOTSUPP))
1636                         cifs_dbg(VFS, "ioctl error in smb2_get_dfs_refer rc=%d\n", rc);
1637                 goto out;
1638         }
1639
1640         rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size,
1641                                  num_of_nodes, target_nodes,
1642                                  nls_codepage, remap, search_name,
1643                                  true /* is_unicode */);
1644         if (rc) {
1645                 cifs_dbg(VFS, "parse error in smb2_get_dfs_refer rc=%d\n", rc);
1646                 goto out;
1647         }
1648
1649  out:
1650         if (tcon && !tcon->ipc) {
1651                 /* ipc tcons are not refcounted */
1652                 spin_lock(&cifs_tcp_ses_lock);
1653                 tcon->tc_count--;
1654                 spin_unlock(&cifs_tcp_ses_lock);
1655         }
1656         kfree(utf16_path);
1657         kfree(dfs_req);
1658         kfree(dfs_rsp);
1659         return rc;
1660 }
1661 #define SMB2_SYMLINK_STRUCT_SIZE \
1662         (sizeof(struct smb2_err_rsp) - 1 + sizeof(struct smb2_symlink_err_rsp))
1663
1664 static int
1665 smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
1666                    const char *full_path, char **target_path,
1667                    struct cifs_sb_info *cifs_sb)
1668 {
1669         int rc;
1670         __le16 *utf16_path;
1671         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1672         struct cifs_open_parms oparms;
1673         struct cifs_fid fid;
1674         struct kvec err_iov = {NULL, 0};
1675         struct smb2_err_rsp *err_buf = NULL;
1676         int resp_buftype;
1677         struct smb2_symlink_err_rsp *symlink;
1678         unsigned int sub_len;
1679         unsigned int sub_offset;
1680         unsigned int print_len;
1681         unsigned int print_offset;
1682
1683         cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
1684
1685         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
1686         if (!utf16_path)
1687                 return -ENOMEM;
1688
1689         oparms.tcon = tcon;
1690         oparms.desired_access = FILE_READ_ATTRIBUTES;
1691         oparms.disposition = FILE_OPEN;
1692         oparms.create_options = 0;
1693         oparms.fid = &fid;
1694         oparms.reconnect = false;
1695
1696         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, &err_iov,
1697                        &resp_buftype);
1698         if (!rc || !err_iov.iov_base) {
1699                 rc = -ENOENT;
1700                 goto querty_exit;
1701         }
1702
1703         err_buf = err_iov.iov_base;
1704         if (le32_to_cpu(err_buf->ByteCount) < sizeof(struct smb2_symlink_err_rsp) ||
1705             err_iov.iov_len < SMB2_SYMLINK_STRUCT_SIZE) {
1706                 rc = -ENOENT;
1707                 goto querty_exit;
1708         }
1709
1710         /* open must fail on symlink - reset rc */
1711         rc = 0;
1712         symlink = (struct smb2_symlink_err_rsp *)err_buf->ErrorData;
1713         sub_len = le16_to_cpu(symlink->SubstituteNameLength);
1714         sub_offset = le16_to_cpu(symlink->SubstituteNameOffset);
1715         print_len = le16_to_cpu(symlink->PrintNameLength);
1716         print_offset = le16_to_cpu(symlink->PrintNameOffset);
1717
1718         if (err_iov.iov_len < SMB2_SYMLINK_STRUCT_SIZE + sub_offset + sub_len) {
1719                 rc = -ENOENT;
1720                 goto querty_exit;
1721         }
1722
1723         if (err_iov.iov_len <
1724             SMB2_SYMLINK_STRUCT_SIZE + print_offset + print_len) {
1725                 rc = -ENOENT;
1726                 goto querty_exit;
1727         }
1728
1729         *target_path = cifs_strndup_from_utf16(
1730                                 (char *)symlink->PathBuffer + sub_offset,
1731                                 sub_len, true, cifs_sb->local_nls);
1732         if (!(*target_path)) {
1733                 rc = -ENOMEM;
1734                 goto querty_exit;
1735         }
1736         convert_delimiter(*target_path, '/');
1737         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
1738
1739  querty_exit:
1740         free_rsp_buf(resp_buftype, err_buf);
1741         kfree(utf16_path);
1742         return rc;
1743 }
1744
1745 #ifdef CONFIG_CIFS_ACL
1746 static struct cifs_ntsd *
1747 get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb,
1748                 const struct cifs_fid *cifsfid, u32 *pacllen)
1749 {
1750         struct cifs_ntsd *pntsd = NULL;
1751         unsigned int xid;
1752         int rc = -EOPNOTSUPP;
1753         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
1754
1755         if (IS_ERR(tlink))
1756                 return ERR_CAST(tlink);
1757
1758         xid = get_xid();
1759         cifs_dbg(FYI, "trying to get acl\n");
1760
1761         rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid,
1762                             cifsfid->volatile_fid, (void **)&pntsd, pacllen);
1763         free_xid(xid);
1764
1765         cifs_put_tlink(tlink);
1766
1767         cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
1768         if (rc)
1769                 return ERR_PTR(rc);
1770         return pntsd;
1771
1772 }
1773
1774 static struct cifs_ntsd *
1775 get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb,
1776                 const char *path, u32 *pacllen)
1777 {
1778         struct cifs_ntsd *pntsd = NULL;
1779         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1780         unsigned int xid;
1781         int rc;
1782         struct cifs_tcon *tcon;
1783         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
1784         struct cifs_fid fid;
1785         struct cifs_open_parms oparms;
1786         __le16 *utf16_path;
1787
1788         cifs_dbg(FYI, "get smb3 acl for path %s\n", path);
1789         if (IS_ERR(tlink))
1790                 return ERR_CAST(tlink);
1791
1792         tcon = tlink_tcon(tlink);
1793         xid = get_xid();
1794
1795         if (backup_cred(cifs_sb))
1796                 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
1797         else
1798                 oparms.create_options = 0;
1799
1800         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1801         if (!utf16_path) {
1802                 rc = -ENOMEM;
1803                 free_xid(xid);
1804                 return ERR_PTR(rc);
1805         }
1806
1807         oparms.tcon = tcon;
1808         oparms.desired_access = READ_CONTROL;
1809         oparms.disposition = FILE_OPEN;
1810         oparms.fid = &fid;
1811         oparms.reconnect = false;
1812
1813         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
1814         kfree(utf16_path);
1815         if (!rc) {
1816                 rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
1817                             fid.volatile_fid, (void **)&pntsd, pacllen);
1818                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
1819         }
1820
1821         cifs_put_tlink(tlink);
1822         free_xid(xid);
1823
1824         cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
1825         if (rc)
1826                 return ERR_PTR(rc);
1827         return pntsd;
1828 }
1829
1830 #ifdef CONFIG_CIFS_ACL
1831 static int
1832 set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen,
1833                 struct inode *inode, const char *path, int aclflag)
1834 {
1835         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1836         unsigned int xid;
1837         int rc, access_flags = 0;
1838         struct cifs_tcon *tcon;
1839         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1840         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
1841         struct cifs_fid fid;
1842         struct cifs_open_parms oparms;
1843         __le16 *utf16_path;
1844
1845         cifs_dbg(FYI, "set smb3 acl for path %s\n", path);
1846         if (IS_ERR(tlink))
1847                 return PTR_ERR(tlink);
1848
1849         tcon = tlink_tcon(tlink);
1850         xid = get_xid();
1851
1852         if (backup_cred(cifs_sb))
1853                 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
1854         else
1855                 oparms.create_options = 0;
1856
1857         if (aclflag == CIFS_ACL_OWNER || aclflag == CIFS_ACL_GROUP)
1858                 access_flags = WRITE_OWNER;
1859         else
1860                 access_flags = WRITE_DAC;
1861
1862         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1863         if (!utf16_path) {
1864                 rc = -ENOMEM;
1865                 free_xid(xid);
1866                 return rc;
1867         }
1868
1869         oparms.tcon = tcon;
1870         oparms.desired_access = access_flags;
1871         oparms.disposition = FILE_OPEN;
1872         oparms.path = path;
1873         oparms.fid = &fid;
1874         oparms.reconnect = false;
1875
1876         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
1877         kfree(utf16_path);
1878         if (!rc) {
1879                 rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
1880                             fid.volatile_fid, pnntsd, acllen, aclflag);
1881                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
1882         }
1883
1884         cifs_put_tlink(tlink);
1885         free_xid(xid);
1886         return rc;
1887 }
1888 #endif /* CIFS_ACL */
1889
1890 /* Retrieve an ACL from the server */
1891 static struct cifs_ntsd *
1892 get_smb2_acl(struct cifs_sb_info *cifs_sb,
1893                                       struct inode *inode, const char *path,
1894                                       u32 *pacllen)
1895 {
1896         struct cifs_ntsd *pntsd = NULL;
1897         struct cifsFileInfo *open_file = NULL;
1898
1899         if (inode)
1900                 open_file = find_readable_file(CIFS_I(inode), true);
1901         if (!open_file)
1902                 return get_smb2_acl_by_path(cifs_sb, path, pacllen);
1903
1904         pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen);
1905         cifsFileInfo_put(open_file);
1906         return pntsd;
1907 }
1908 #endif
1909
1910 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
1911                             loff_t offset, loff_t len, bool keep_size)
1912 {
1913         struct inode *inode;
1914         struct cifsInodeInfo *cifsi;
1915         struct cifsFileInfo *cfile = file->private_data;
1916         struct file_zero_data_information fsctl_buf;
1917         long rc;
1918         unsigned int xid;
1919
1920         xid = get_xid();
1921
1922         inode = d_inode(cfile->dentry);
1923         cifsi = CIFS_I(inode);
1924
1925         /* if file not oplocked can't be sure whether asking to extend size */
1926         if (!CIFS_CACHE_READ(cifsi))
1927                 if (keep_size == false) {
1928                         rc = -EOPNOTSUPP;
1929                         free_xid(xid);
1930                         return rc;
1931                 }
1932
1933         /*
1934          * Must check if file sparse since fallocate -z (zero range) assumes
1935          * non-sparse allocation
1936          */
1937         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) {
1938                 rc = -EOPNOTSUPP;
1939                 free_xid(xid);
1940                 return rc;
1941         }
1942
1943         /*
1944          * need to make sure we are not asked to extend the file since the SMB3
1945          * fsctl does not change the file size. In the future we could change
1946          * this to zero the first part of the range then set the file size
1947          * which for a non sparse file would zero the newly extended range
1948          */
1949         if (keep_size == false)
1950                 if (i_size_read(inode) < offset + len) {
1951                         rc = -EOPNOTSUPP;
1952                         free_xid(xid);
1953                         return rc;
1954                 }
1955
1956         cifs_dbg(FYI, "offset %lld len %lld", offset, len);
1957
1958         fsctl_buf.FileOffset = cpu_to_le64(offset);
1959         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
1960
1961         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1962                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
1963                         true /* is_fctl */, (char *)&fsctl_buf,
1964                         sizeof(struct file_zero_data_information), NULL, NULL);
1965         free_xid(xid);
1966         return rc;
1967 }
1968
1969 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
1970                             loff_t offset, loff_t len)
1971 {
1972         struct inode *inode;
1973         struct cifsInodeInfo *cifsi;
1974         struct cifsFileInfo *cfile = file->private_data;
1975         struct file_zero_data_information fsctl_buf;
1976         long rc;
1977         unsigned int xid;
1978         __u8 set_sparse = 1;
1979
1980         xid = get_xid();
1981
1982         inode = d_inode(cfile->dentry);
1983         cifsi = CIFS_I(inode);
1984
1985         /* Need to make file sparse, if not already, before freeing range. */
1986         /* Consider adding equivalent for compressed since it could also work */
1987         if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse)) {
1988                 rc = -EOPNOTSUPP;
1989                 free_xid(xid);
1990                 return rc;
1991         }
1992
1993         cifs_dbg(FYI, "offset %lld len %lld", offset, len);
1994
1995         fsctl_buf.FileOffset = cpu_to_le64(offset);
1996         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
1997
1998         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1999                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
2000                         true /* is_fctl */, (char *)&fsctl_buf,
2001                         sizeof(struct file_zero_data_information), NULL, NULL);
2002         free_xid(xid);
2003         return rc;
2004 }
2005
2006 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
2007                             loff_t off, loff_t len, bool keep_size)
2008 {
2009         struct inode *inode;
2010         struct cifsInodeInfo *cifsi;
2011         struct cifsFileInfo *cfile = file->private_data;
2012         long rc = -EOPNOTSUPP;
2013         unsigned int xid;
2014
2015         xid = get_xid();
2016
2017         inode = d_inode(cfile->dentry);
2018         cifsi = CIFS_I(inode);
2019
2020         /* if file not oplocked can't be sure whether asking to extend size */
2021         if (!CIFS_CACHE_READ(cifsi))
2022                 if (keep_size == false) {
2023                         free_xid(xid);
2024                         return rc;
2025                 }
2026
2027         /*
2028          * Files are non-sparse by default so falloc may be a no-op
2029          * Must check if file sparse. If not sparse, and not extending
2030          * then no need to do anything since file already allocated
2031          */
2032         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
2033                 if (keep_size == true)
2034                         rc = 0;
2035                 /* check if extending file */
2036                 else if (i_size_read(inode) >= off + len)
2037                         /* not extending file and already not sparse */
2038                         rc = 0;
2039                 /* BB: in future add else clause to extend file */
2040                 else
2041                         rc = -EOPNOTSUPP;
2042                 free_xid(xid);
2043                 return rc;
2044         }
2045
2046         if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
2047                 /*
2048                  * Check if falloc starts within first few pages of file
2049                  * and ends within a few pages of the end of file to
2050                  * ensure that most of file is being forced to be
2051                  * fallocated now. If so then setting whole file sparse
2052                  * ie potentially making a few extra pages at the beginning
2053                  * or end of the file non-sparse via set_sparse is harmless.
2054                  */
2055                 if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) {
2056                         rc = -EOPNOTSUPP;
2057                         free_xid(xid);
2058                         return rc;
2059                 }
2060
2061                 rc = smb2_set_sparse(xid, tcon, cfile, inode, false);
2062         }
2063         /* BB: else ... in future add code to extend file and set sparse */
2064
2065
2066         free_xid(xid);
2067         return rc;
2068 }
2069
2070
2071 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
2072                            loff_t off, loff_t len)
2073 {
2074         /* KEEP_SIZE already checked for by do_fallocate */
2075         if (mode & FALLOC_FL_PUNCH_HOLE)
2076                 return smb3_punch_hole(file, tcon, off, len);
2077         else if (mode & FALLOC_FL_ZERO_RANGE) {
2078                 if (mode & FALLOC_FL_KEEP_SIZE)
2079                         return smb3_zero_range(file, tcon, off, len, true);
2080                 return smb3_zero_range(file, tcon, off, len, false);
2081         } else if (mode == FALLOC_FL_KEEP_SIZE)
2082                 return smb3_simple_falloc(file, tcon, off, len, true);
2083         else if (mode == 0)
2084                 return smb3_simple_falloc(file, tcon, off, len, false);
2085
2086         return -EOPNOTSUPP;
2087 }
2088
2089 static void
2090 smb2_downgrade_oplock(struct TCP_Server_Info *server,
2091                         struct cifsInodeInfo *cinode, bool set_level2)
2092 {
2093         if (set_level2)
2094                 server->ops->set_oplock_level(cinode, SMB2_OPLOCK_LEVEL_II,
2095                                                 0, NULL);
2096         else
2097                 server->ops->set_oplock_level(cinode, 0, 0, NULL);
2098 }
2099
2100 static void
2101 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
2102                       unsigned int epoch, bool *purge_cache)
2103 {
2104         oplock &= 0xFF;
2105         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
2106                 return;
2107         if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
2108                 cinode->oplock = CIFS_CACHE_RHW_FLG;
2109                 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
2110                          &cinode->vfs_inode);
2111         } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
2112                 cinode->oplock = CIFS_CACHE_RW_FLG;
2113                 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
2114                          &cinode->vfs_inode);
2115         } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
2116                 cinode->oplock = CIFS_CACHE_READ_FLG;
2117                 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
2118                          &cinode->vfs_inode);
2119         } else
2120                 cinode->oplock = 0;
2121 }
2122
2123 static void
2124 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
2125                        unsigned int epoch, bool *purge_cache)
2126 {
2127         char message[5] = {0};
2128
2129         oplock &= 0xFF;
2130         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
2131                 return;
2132
2133         cinode->oplock = 0;
2134         if (oplock & SMB2_LEASE_READ_CACHING_HE) {
2135                 cinode->oplock |= CIFS_CACHE_READ_FLG;
2136                 strcat(message, "R");
2137         }
2138         if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
2139                 cinode->oplock |= CIFS_CACHE_HANDLE_FLG;
2140                 strcat(message, "H");
2141         }
2142         if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
2143                 cinode->oplock |= CIFS_CACHE_WRITE_FLG;
2144                 strcat(message, "W");
2145         }
2146         if (!cinode->oplock)
2147                 strcat(message, "None");
2148         cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
2149                  &cinode->vfs_inode);
2150 }
2151
2152 static void
2153 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
2154                       unsigned int epoch, bool *purge_cache)
2155 {
2156         unsigned int old_oplock = cinode->oplock;
2157
2158         smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
2159
2160         if (purge_cache) {
2161                 *purge_cache = false;
2162                 if (old_oplock == CIFS_CACHE_READ_FLG) {
2163                         if (cinode->oplock == CIFS_CACHE_READ_FLG &&
2164                             (epoch - cinode->epoch > 0))
2165                                 *purge_cache = true;
2166                         else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
2167                                  (epoch - cinode->epoch > 1))
2168                                 *purge_cache = true;
2169                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
2170                                  (epoch - cinode->epoch > 1))
2171                                 *purge_cache = true;
2172                         else if (cinode->oplock == 0 &&
2173                                  (epoch - cinode->epoch > 0))
2174                                 *purge_cache = true;
2175                 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
2176                         if (cinode->oplock == CIFS_CACHE_RH_FLG &&
2177                             (epoch - cinode->epoch > 0))
2178                                 *purge_cache = true;
2179                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
2180                                  (epoch - cinode->epoch > 1))
2181                                 *purge_cache = true;
2182                 }
2183                 cinode->epoch = epoch;
2184         }
2185 }
2186
2187 static bool
2188 smb2_is_read_op(__u32 oplock)
2189 {
2190         return oplock == SMB2_OPLOCK_LEVEL_II;
2191 }
2192
2193 static bool
2194 smb21_is_read_op(__u32 oplock)
2195 {
2196         return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
2197                !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
2198 }
2199
2200 static __le32
2201 map_oplock_to_lease(u8 oplock)
2202 {
2203         if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
2204                 return SMB2_LEASE_WRITE_CACHING | SMB2_LEASE_READ_CACHING;
2205         else if (oplock == SMB2_OPLOCK_LEVEL_II)
2206                 return SMB2_LEASE_READ_CACHING;
2207         else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
2208                 return SMB2_LEASE_HANDLE_CACHING | SMB2_LEASE_READ_CACHING |
2209                        SMB2_LEASE_WRITE_CACHING;
2210         return 0;
2211 }
2212
2213 static char *
2214 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
2215 {
2216         struct create_lease *buf;
2217
2218         buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
2219         if (!buf)
2220                 return NULL;
2221
2222         buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
2223         buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
2224         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
2225
2226         buf->ccontext.DataOffset = cpu_to_le16(offsetof
2227                                         (struct create_lease, lcontext));
2228         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
2229         buf->ccontext.NameOffset = cpu_to_le16(offsetof
2230                                 (struct create_lease, Name));
2231         buf->ccontext.NameLength = cpu_to_le16(4);
2232         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
2233         buf->Name[0] = 'R';
2234         buf->Name[1] = 'q';
2235         buf->Name[2] = 'L';
2236         buf->Name[3] = 's';
2237         return (char *)buf;
2238 }
2239
2240 static char *
2241 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
2242 {
2243         struct create_lease_v2 *buf;
2244
2245         buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
2246         if (!buf)
2247                 return NULL;
2248
2249         buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
2250         buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
2251         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
2252
2253         buf->ccontext.DataOffset = cpu_to_le16(offsetof
2254                                         (struct create_lease_v2, lcontext));
2255         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
2256         buf->ccontext.NameOffset = cpu_to_le16(offsetof
2257                                 (struct create_lease_v2, Name));
2258         buf->ccontext.NameLength = cpu_to_le16(4);
2259         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
2260         buf->Name[0] = 'R';
2261         buf->Name[1] = 'q';
2262         buf->Name[2] = 'L';
2263         buf->Name[3] = 's';
2264         return (char *)buf;
2265 }
2266
2267 static __u8
2268 smb2_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
2269 {
2270         struct create_lease *lc = (struct create_lease *)buf;
2271
2272         *epoch = 0; /* not used */
2273         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
2274                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
2275         return le32_to_cpu(lc->lcontext.LeaseState);
2276 }
2277
2278 static __u8
2279 smb3_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
2280 {
2281         struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
2282
2283         *epoch = le16_to_cpu(lc->lcontext.Epoch);
2284         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
2285                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
2286         if (lease_key)
2287                 memcpy(lease_key, &lc->lcontext.LeaseKeyLow,
2288                        SMB2_LEASE_KEY_SIZE);
2289         return le32_to_cpu(lc->lcontext.LeaseState);
2290 }
2291
2292 static unsigned int
2293 smb2_wp_retry_size(struct inode *inode)
2294 {
2295         return min_t(unsigned int, CIFS_SB(inode->i_sb)->wsize,
2296                      SMB2_MAX_BUFFER_SIZE);
2297 }
2298
2299 static bool
2300 smb2_dir_needs_close(struct cifsFileInfo *cfile)
2301 {
2302         return !cfile->invalidHandle;
2303 }
2304
2305 static void
2306 fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len,
2307                    struct smb_rqst *old_rq)
2308 {
2309         struct smb2_sync_hdr *shdr =
2310                         (struct smb2_sync_hdr *)old_rq->rq_iov[0].iov_base;
2311
2312         memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr));
2313         tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
2314         tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
2315         tr_hdr->Flags = cpu_to_le16(0x01);
2316         get_random_bytes(&tr_hdr->Nonce, SMB3_AES128CMM_NONCE);
2317         memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8);
2318 }
2319
2320 /* We can not use the normal sg_set_buf() as we will sometimes pass a
2321  * stack object as buf.
2322  */
2323 static inline void smb2_sg_set_buf(struct scatterlist *sg, const void *buf,
2324                                    unsigned int buflen)
2325 {
2326         sg_set_page(sg, virt_to_page(buf), buflen, offset_in_page(buf));
2327 }
2328
2329 /* Assumes:
2330  * rqst->rq_iov[0]  is transform header
2331  * rqst->rq_iov[1+] data to be encrypted/decrypted
2332  */
2333 static struct scatterlist *
2334 init_sg(struct smb_rqst *rqst, u8 *sign)
2335 {
2336         unsigned int sg_len = rqst->rq_nvec + rqst->rq_npages + 1;
2337         unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20;
2338         struct scatterlist *sg;
2339         unsigned int i;
2340         unsigned int j;
2341
2342         sg = kmalloc_array(sg_len, sizeof(struct scatterlist), GFP_KERNEL);
2343         if (!sg)
2344                 return NULL;
2345
2346         sg_init_table(sg, sg_len);
2347         smb2_sg_set_buf(&sg[0], rqst->rq_iov[0].iov_base + 20, assoc_data_len);
2348         for (i = 1; i < rqst->rq_nvec; i++)
2349                 smb2_sg_set_buf(&sg[i], rqst->rq_iov[i].iov_base,
2350                                                 rqst->rq_iov[i].iov_len);
2351         for (j = 0; i < sg_len - 1; i++, j++) {
2352                 unsigned int len, offset;
2353
2354                 rqst_page_get_length(rqst, j, &len, &offset);
2355                 sg_set_page(&sg[i], rqst->rq_pages[j], len, offset);
2356         }
2357         smb2_sg_set_buf(&sg[sg_len - 1], sign, SMB2_SIGNATURE_SIZE);
2358         return sg;
2359 }
2360
2361 static int
2362 smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key)
2363 {
2364         struct cifs_ses *ses;
2365         u8 *ses_enc_key;
2366
2367         spin_lock(&cifs_tcp_ses_lock);
2368         list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
2369                 if (ses->Suid != ses_id)
2370                         continue;
2371                 ses_enc_key = enc ? ses->smb3encryptionkey :
2372                                                         ses->smb3decryptionkey;
2373                 memcpy(key, ses_enc_key, SMB3_SIGN_KEY_SIZE);
2374                 spin_unlock(&cifs_tcp_ses_lock);
2375                 return 0;
2376         }
2377         spin_unlock(&cifs_tcp_ses_lock);
2378
2379         return 1;
2380 }
2381 /*
2382  * Encrypt or decrypt @rqst message. @rqst[0] has the following format:
2383  * iov[0]   - transform header (associate data),
2384  * iov[1-N] - SMB2 header and pages - data to encrypt.
2385  * On success return encrypted data in iov[1-N] and pages, leave iov[0]
2386  * untouched.
2387  */
2388 static int
2389 crypt_message(struct TCP_Server_Info *server, struct smb_rqst *rqst, int enc)
2390 {
2391         struct smb2_transform_hdr *tr_hdr =
2392                         (struct smb2_transform_hdr *)rqst->rq_iov[0].iov_base;
2393         unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20;
2394         int rc = 0;
2395         struct scatterlist *sg;
2396         u8 sign[SMB2_SIGNATURE_SIZE] = {};
2397         u8 key[SMB3_SIGN_KEY_SIZE];
2398         struct aead_request *req;
2399         char *iv;
2400         unsigned int iv_len;
2401         DECLARE_CRYPTO_WAIT(wait);
2402         struct crypto_aead *tfm;
2403         unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
2404
2405         rc = smb2_get_enc_key(server, tr_hdr->SessionId, enc, key);
2406         if (rc) {
2407                 cifs_dbg(VFS, "%s: Could not get %scryption key\n", __func__,
2408                          enc ? "en" : "de");
2409                 return 0;
2410         }
2411
2412         rc = smb3_crypto_aead_allocate(server);
2413         if (rc) {
2414                 cifs_dbg(VFS, "%s: crypto alloc failed\n", __func__);
2415                 return rc;
2416         }
2417
2418         tfm = enc ? server->secmech.ccmaesencrypt :
2419                                                 server->secmech.ccmaesdecrypt;
2420         rc = crypto_aead_setkey(tfm, key, SMB3_SIGN_KEY_SIZE);
2421         if (rc) {
2422                 cifs_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc);
2423                 return rc;
2424         }
2425
2426         rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE);
2427         if (rc) {
2428                 cifs_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc);
2429                 return rc;
2430         }
2431
2432         req = aead_request_alloc(tfm, GFP_KERNEL);
2433         if (!req) {
2434                 cifs_dbg(VFS, "%s: Failed to alloc aead request", __func__);
2435                 return -ENOMEM;
2436         }
2437
2438         if (!enc) {
2439                 memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE);
2440                 crypt_len += SMB2_SIGNATURE_SIZE;
2441         }
2442
2443         sg = init_sg(rqst, sign);
2444         if (!sg) {
2445                 cifs_dbg(VFS, "%s: Failed to init sg", __func__);
2446                 rc = -ENOMEM;
2447                 goto free_req;
2448         }
2449
2450         iv_len = crypto_aead_ivsize(tfm);
2451         iv = kzalloc(iv_len, GFP_KERNEL);
2452         if (!iv) {
2453                 cifs_dbg(VFS, "%s: Failed to alloc IV", __func__);
2454                 rc = -ENOMEM;
2455                 goto free_sg;
2456         }
2457         iv[0] = 3;
2458         memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES128CMM_NONCE);
2459
2460         aead_request_set_crypt(req, sg, sg, crypt_len, iv);
2461         aead_request_set_ad(req, assoc_data_len);
2462
2463         aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
2464                                   crypto_req_done, &wait);
2465
2466         rc = crypto_wait_req(enc ? crypto_aead_encrypt(req)
2467                                 : crypto_aead_decrypt(req), &wait);
2468
2469         if (!rc && enc)
2470                 memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE);
2471
2472         kfree(iv);
2473 free_sg:
2474         kfree(sg);
2475 free_req:
2476         kfree(req);
2477         return rc;
2478 }
2479
2480 static int
2481 smb3_init_transform_rq(struct TCP_Server_Info *server, struct smb_rqst *new_rq,
2482                        struct smb_rqst *old_rq)
2483 {
2484         struct kvec *iov;
2485         struct page **pages;
2486         struct smb2_transform_hdr *tr_hdr;
2487         unsigned int npages = old_rq->rq_npages;
2488         unsigned int orig_len = 0;
2489         int i;
2490         int rc = -ENOMEM;
2491
2492         pages = kmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
2493         if (!pages)
2494                 return rc;
2495
2496         new_rq->rq_pages = pages;
2497         new_rq->rq_offset = old_rq->rq_offset;
2498         new_rq->rq_npages = old_rq->rq_npages;
2499         new_rq->rq_pagesz = old_rq->rq_pagesz;
2500         new_rq->rq_tailsz = old_rq->rq_tailsz;
2501
2502         for (i = 0; i < old_rq->rq_nvec; i++)
2503                 orig_len += old_rq->rq_iov[i].iov_len;
2504
2505         for (i = 0; i < npages; i++) {
2506                 pages[i] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
2507                 if (!pages[i])
2508                         goto err_free_pages;
2509         }
2510
2511         iov = kmalloc_array(old_rq->rq_nvec + 1, sizeof(struct kvec),
2512                             GFP_KERNEL);
2513         if (!iov)
2514                 goto err_free_pages;
2515
2516         /* copy all iovs from the old */
2517         memcpy(&iov[1], &old_rq->rq_iov[0],
2518                                 sizeof(struct kvec) * old_rq->rq_nvec);
2519
2520         new_rq->rq_iov = iov;
2521         new_rq->rq_nvec = old_rq->rq_nvec + 1;
2522
2523         tr_hdr = kmalloc(sizeof(struct smb2_transform_hdr), GFP_KERNEL);
2524         if (!tr_hdr)
2525                 goto err_free_iov;
2526
2527         /* fill the 2nd iov with a transform header */
2528         fill_transform_hdr(tr_hdr, orig_len, old_rq);
2529         new_rq->rq_iov[0].iov_base = tr_hdr;
2530         new_rq->rq_iov[0].iov_len = sizeof(struct smb2_transform_hdr);
2531
2532         /* copy pages form the old */
2533         for (i = 0; i < npages; i++) {
2534                 char *dst, *src;
2535                 unsigned int offset, len;
2536
2537                 rqst_page_get_length(new_rq, i, &len, &offset);
2538
2539                 dst = (char *) kmap(new_rq->rq_pages[i]) + offset;
2540                 src = (char *) kmap(old_rq->rq_pages[i]) + offset;
2541
2542                 memcpy(dst, src, len);
2543                 kunmap(new_rq->rq_pages[i]);
2544                 kunmap(old_rq->rq_pages[i]);
2545         }
2546
2547         rc = crypt_message(server, new_rq, 1);
2548         cifs_dbg(FYI, "encrypt message returned %d", rc);
2549         if (rc)
2550                 goto err_free_tr_hdr;
2551
2552         return rc;
2553
2554 err_free_tr_hdr:
2555         kfree(tr_hdr);
2556 err_free_iov:
2557         kfree(iov);
2558 err_free_pages:
2559         for (i = i - 1; i >= 0; i--)
2560                 put_page(pages[i]);
2561         kfree(pages);
2562         return rc;
2563 }
2564
2565 static void
2566 smb3_free_transform_rq(struct smb_rqst *rqst)
2567 {
2568         int i = rqst->rq_npages - 1;
2569
2570         for (; i >= 0; i--)
2571                 put_page(rqst->rq_pages[i]);
2572         kfree(rqst->rq_pages);
2573         /* free transform header */
2574         kfree(rqst->rq_iov[0].iov_base);
2575         kfree(rqst->rq_iov);
2576 }
2577
2578 static int
2579 smb3_is_transform_hdr(void *buf)
2580 {
2581         struct smb2_transform_hdr *trhdr = buf;
2582
2583         return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
2584 }
2585
2586 static int
2587 decrypt_raw_data(struct TCP_Server_Info *server, char *buf,
2588                  unsigned int buf_data_size, struct page **pages,
2589                  unsigned int npages, unsigned int page_data_size)
2590 {
2591         struct kvec iov[2];
2592         struct smb_rqst rqst = {NULL};
2593         int rc;
2594
2595         iov[0].iov_base = buf;
2596         iov[0].iov_len = sizeof(struct smb2_transform_hdr);
2597         iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr);
2598         iov[1].iov_len = buf_data_size;
2599
2600         rqst.rq_iov = iov;
2601         rqst.rq_nvec = 2;
2602         rqst.rq_pages = pages;
2603         rqst.rq_npages = npages;
2604         rqst.rq_pagesz = PAGE_SIZE;
2605         rqst.rq_tailsz = (page_data_size % PAGE_SIZE) ? : PAGE_SIZE;
2606
2607         rc = crypt_message(server, &rqst, 0);
2608         cifs_dbg(FYI, "decrypt message returned %d\n", rc);
2609
2610         if (rc)
2611                 return rc;
2612
2613         memmove(buf, iov[1].iov_base, buf_data_size);
2614
2615         server->total_read = buf_data_size + page_data_size;
2616
2617         return rc;
2618 }
2619
2620 static int
2621 read_data_into_pages(struct TCP_Server_Info *server, struct page **pages,
2622                      unsigned int npages, unsigned int len)
2623 {
2624         int i;
2625         int length;
2626
2627         for (i = 0; i < npages; i++) {
2628                 struct page *page = pages[i];
2629                 size_t n;
2630
2631                 n = len;
2632                 if (len >= PAGE_SIZE) {
2633                         /* enough data to fill the page */
2634                         n = PAGE_SIZE;
2635                         len -= n;
2636                 } else {
2637                         zero_user(page, len, PAGE_SIZE - len);
2638                         len = 0;
2639                 }
2640                 length = cifs_read_page_from_socket(server, page, 0, n);
2641                 if (length < 0)
2642                         return length;
2643                 server->total_read += length;
2644         }
2645
2646         return 0;
2647 }
2648
2649 static int
2650 init_read_bvec(struct page **pages, unsigned int npages, unsigned int data_size,
2651                unsigned int cur_off, struct bio_vec **page_vec)
2652 {
2653         struct bio_vec *bvec;
2654         int i;
2655
2656         bvec = kcalloc(npages, sizeof(struct bio_vec), GFP_KERNEL);
2657         if (!bvec)
2658                 return -ENOMEM;
2659
2660         for (i = 0; i < npages; i++) {
2661                 bvec[i].bv_page = pages[i];
2662                 bvec[i].bv_offset = (i == 0) ? cur_off : 0;
2663                 bvec[i].bv_len = min_t(unsigned int, PAGE_SIZE, data_size);
2664                 data_size -= bvec[i].bv_len;
2665         }
2666
2667         if (data_size != 0) {
2668                 cifs_dbg(VFS, "%s: something went wrong\n", __func__);
2669                 kfree(bvec);
2670                 return -EIO;
2671         }
2672
2673         *page_vec = bvec;
2674         return 0;
2675 }
2676
2677 static int
2678 handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid,
2679                  char *buf, unsigned int buf_len, struct page **pages,
2680                  unsigned int npages, unsigned int page_data_size)
2681 {
2682         unsigned int data_offset;
2683         unsigned int data_len;
2684         unsigned int cur_off;
2685         unsigned int cur_page_idx;
2686         unsigned int pad_len;
2687         struct cifs_readdata *rdata = mid->callback_data;
2688         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
2689         struct bio_vec *bvec = NULL;
2690         struct iov_iter iter;
2691         struct kvec iov;
2692         int length;
2693         bool use_rdma_mr = false;
2694
2695         if (shdr->Command != SMB2_READ) {
2696                 cifs_dbg(VFS, "only big read responses are supported\n");
2697                 return -ENOTSUPP;
2698         }
2699
2700         if (server->ops->is_session_expired &&
2701             server->ops->is_session_expired(buf)) {
2702                 cifs_reconnect(server);
2703                 wake_up(&server->response_q);
2704                 return -1;
2705         }
2706
2707         if (server->ops->is_status_pending &&
2708                         server->ops->is_status_pending(buf, server, 0))
2709                 return -1;
2710
2711         rdata->result = server->ops->map_error(buf, false);
2712         if (rdata->result != 0) {
2713                 cifs_dbg(FYI, "%s: server returned error %d\n",
2714                          __func__, rdata->result);
2715                 dequeue_mid(mid, rdata->result);
2716                 return 0;
2717         }
2718
2719         data_offset = server->ops->read_data_offset(buf);
2720 #ifdef CONFIG_CIFS_SMB_DIRECT
2721         use_rdma_mr = rdata->mr;
2722 #endif
2723         data_len = server->ops->read_data_length(buf, use_rdma_mr);
2724
2725         if (data_offset < server->vals->read_rsp_size) {
2726                 /*
2727                  * win2k8 sometimes sends an offset of 0 when the read
2728                  * is beyond the EOF. Treat it as if the data starts just after
2729                  * the header.
2730                  */
2731                 cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n",
2732                          __func__, data_offset);
2733                 data_offset = server->vals->read_rsp_size;
2734         } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) {
2735                 /* data_offset is beyond the end of smallbuf */
2736                 cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n",
2737                          __func__, data_offset);
2738                 rdata->result = -EIO;
2739                 dequeue_mid(mid, rdata->result);
2740                 return 0;
2741         }
2742
2743         pad_len = data_offset - server->vals->read_rsp_size;
2744
2745         if (buf_len <= data_offset) {
2746                 /* read response payload is in pages */
2747                 cur_page_idx = pad_len / PAGE_SIZE;
2748                 cur_off = pad_len % PAGE_SIZE;
2749
2750                 if (cur_page_idx != 0) {
2751                         /* data offset is beyond the 1st page of response */
2752                         cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n",
2753                                  __func__, data_offset);
2754                         rdata->result = -EIO;
2755                         dequeue_mid(mid, rdata->result);
2756                         return 0;
2757                 }
2758
2759                 if (data_len > page_data_size - pad_len) {
2760                         /* data_len is corrupt -- discard frame */
2761                         rdata->result = -EIO;
2762                         dequeue_mid(mid, rdata->result);
2763                         return 0;
2764                 }
2765
2766                 rdata->result = init_read_bvec(pages, npages, page_data_size,
2767                                                cur_off, &bvec);
2768                 if (rdata->result != 0) {
2769                         dequeue_mid(mid, rdata->result);
2770                         return 0;
2771                 }
2772
2773                 iov_iter_bvec(&iter, WRITE | ITER_BVEC, bvec, npages, data_len);
2774         } else if (buf_len >= data_offset + data_len) {
2775                 /* read response payload is in buf */
2776                 WARN_ONCE(npages > 0, "read data can be either in buf or in pages");
2777                 iov.iov_base = buf + data_offset;
2778                 iov.iov_len = data_len;
2779                 iov_iter_kvec(&iter, WRITE | ITER_KVEC, &iov, 1, data_len);
2780         } else {
2781                 /* read response payload cannot be in both buf and pages */
2782                 WARN_ONCE(1, "buf can not contain only a part of read data");
2783                 rdata->result = -EIO;
2784                 dequeue_mid(mid, rdata->result);
2785                 return 0;
2786         }
2787
2788         /* set up first iov for signature check */
2789         rdata->iov[0].iov_base = buf;
2790         rdata->iov[0].iov_len = 4;
2791         rdata->iov[1].iov_base = buf + 4;
2792         rdata->iov[1].iov_len = server->vals->read_rsp_size - 4;
2793         cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n",
2794                  rdata->iov[0].iov_base, server->vals->read_rsp_size);
2795
2796         length = rdata->copy_into_pages(server, rdata, &iter);
2797
2798         kfree(bvec);
2799
2800         if (length < 0)
2801                 return length;
2802
2803         dequeue_mid(mid, false);
2804         return length;
2805 }
2806
2807 static int
2808 receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid)
2809 {
2810         char *buf = server->smallbuf;
2811         struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
2812         unsigned int npages;
2813         struct page **pages;
2814         unsigned int len;
2815         unsigned int buflen = server->pdu_size;
2816         int rc;
2817         int i = 0;
2818
2819         len = min_t(unsigned int, buflen, server->vals->read_rsp_size +
2820                 sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1;
2821
2822         rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len);
2823         if (rc < 0)
2824                 return rc;
2825         server->total_read += rc;
2826
2827         len = le32_to_cpu(tr_hdr->OriginalMessageSize) -
2828                 server->vals->read_rsp_size;
2829         npages = DIV_ROUND_UP(len, PAGE_SIZE);
2830
2831         pages = kmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
2832         if (!pages) {
2833                 rc = -ENOMEM;
2834                 goto discard_data;
2835         }
2836
2837         for (; i < npages; i++) {
2838                 pages[i] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
2839                 if (!pages[i]) {
2840                         rc = -ENOMEM;
2841                         goto discard_data;
2842                 }
2843         }
2844
2845         /* read read data into pages */
2846         rc = read_data_into_pages(server, pages, npages, len);
2847         if (rc)
2848                 goto free_pages;
2849
2850         rc = cifs_discard_remaining_data(server);
2851         if (rc)
2852                 goto free_pages;
2853
2854         rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size,
2855                               pages, npages, len);
2856         if (rc)
2857                 goto free_pages;
2858
2859         *mid = smb2_find_mid(server, buf);
2860         if (*mid == NULL)
2861                 cifs_dbg(FYI, "mid not found\n");
2862         else {
2863                 cifs_dbg(FYI, "mid found\n");
2864                 (*mid)->decrypted = true;
2865                 rc = handle_read_data(server, *mid, buf,
2866                                       server->vals->read_rsp_size,
2867                                       pages, npages, len);
2868         }
2869
2870 free_pages:
2871         for (i = i - 1; i >= 0; i--)
2872                 put_page(pages[i]);
2873         kfree(pages);
2874         return rc;
2875 discard_data:
2876         cifs_discard_remaining_data(server);
2877         goto free_pages;
2878 }
2879
2880 static int
2881 receive_encrypted_standard(struct TCP_Server_Info *server,
2882                            struct mid_q_entry **mid)
2883 {
2884         int length;
2885         char *buf = server->smallbuf;
2886         unsigned int pdu_length = server->pdu_size;
2887         unsigned int buf_size;
2888         struct mid_q_entry *mid_entry;
2889
2890         /* switch to large buffer if too big for a small one */
2891         if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE) {
2892                 server->large_buf = true;
2893                 memcpy(server->bigbuf, buf, server->total_read);
2894                 buf = server->bigbuf;
2895         }
2896
2897         /* now read the rest */
2898         length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
2899                                 pdu_length - HEADER_SIZE(server) + 1);
2900         if (length < 0)
2901                 return length;
2902         server->total_read += length;
2903
2904         buf_size = pdu_length - sizeof(struct smb2_transform_hdr);
2905         length = decrypt_raw_data(server, buf, buf_size, NULL, 0, 0);
2906         if (length)
2907                 return length;
2908
2909         mid_entry = smb2_find_mid(server, buf);
2910         if (mid_entry == NULL)
2911                 cifs_dbg(FYI, "mid not found\n");
2912         else {
2913                 cifs_dbg(FYI, "mid found\n");
2914                 mid_entry->decrypted = true;
2915         }
2916
2917         *mid = mid_entry;
2918
2919         if (mid_entry && mid_entry->handle)
2920                 return mid_entry->handle(server, mid_entry);
2921
2922         return cifs_handle_standard(server, mid_entry);
2923 }
2924
2925 static int
2926 smb3_receive_transform(struct TCP_Server_Info *server, struct mid_q_entry **mid)
2927 {
2928         char *buf = server->smallbuf;
2929         unsigned int pdu_length = server->pdu_size;
2930         struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
2931         unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
2932
2933         if (pdu_length < sizeof(struct smb2_transform_hdr) +
2934                                                 sizeof(struct smb2_sync_hdr)) {
2935                 cifs_dbg(VFS, "Transform message is too small (%u)\n",
2936                          pdu_length);
2937                 cifs_reconnect(server);
2938                 wake_up(&server->response_q);
2939                 return -ECONNABORTED;
2940         }
2941
2942         if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) {
2943                 cifs_dbg(VFS, "Transform message is broken\n");
2944                 cifs_reconnect(server);
2945                 wake_up(&server->response_q);
2946                 return -ECONNABORTED;
2947         }
2948
2949         if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server))
2950                 return receive_encrypted_read(server, mid);
2951
2952         return receive_encrypted_standard(server, mid);
2953 }
2954
2955 int
2956 smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid)
2957 {
2958         char *buf = server->large_buf ? server->bigbuf : server->smallbuf;
2959
2960         return handle_read_data(server, mid, buf, server->pdu_size,
2961                                 NULL, 0, 0);
2962 }
2963
2964 static int
2965 smb2_next_header(char *buf)
2966 {
2967         struct smb2_sync_hdr *hdr = (struct smb2_sync_hdr *)buf;
2968         struct smb2_transform_hdr *t_hdr = (struct smb2_transform_hdr *)buf;
2969
2970         if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM)
2971                 return sizeof(struct smb2_transform_hdr) +
2972                   le32_to_cpu(t_hdr->OriginalMessageSize);
2973
2974         return le32_to_cpu(hdr->NextCommand);
2975 }
2976
2977 struct smb_version_operations smb20_operations = {
2978         .compare_fids = smb2_compare_fids,
2979         .setup_request = smb2_setup_request,
2980         .setup_async_request = smb2_setup_async_request,
2981         .check_receive = smb2_check_receive,
2982         .add_credits = smb2_add_credits,
2983         .set_credits = smb2_set_credits,
2984         .get_credits_field = smb2_get_credits_field,
2985         .get_credits = smb2_get_credits,
2986         .wait_mtu_credits = cifs_wait_mtu_credits,
2987         .get_next_mid = smb2_get_next_mid,
2988         .read_data_offset = smb2_read_data_offset,
2989         .read_data_length = smb2_read_data_length,
2990         .map_error = map_smb2_to_linux_error,
2991         .find_mid = smb2_find_mid,
2992         .check_message = smb2_check_message,
2993         .dump_detail = smb2_dump_detail,
2994         .clear_stats = smb2_clear_stats,
2995         .print_stats = smb2_print_stats,
2996         .is_oplock_break = smb2_is_valid_oplock_break,
2997         .handle_cancelled_mid = smb2_handle_cancelled_mid,
2998         .downgrade_oplock = smb2_downgrade_oplock,
2999         .need_neg = smb2_need_neg,
3000         .negotiate = smb2_negotiate,
3001         .negotiate_wsize = smb2_negotiate_wsize,
3002         .negotiate_rsize = smb2_negotiate_rsize,
3003         .sess_setup = SMB2_sess_setup,
3004         .logoff = SMB2_logoff,
3005         .tree_connect = SMB2_tcon,
3006         .tree_disconnect = SMB2_tdis,
3007         .qfs_tcon = smb2_qfs_tcon,
3008         .is_path_accessible = smb2_is_path_accessible,
3009         .can_echo = smb2_can_echo,
3010         .echo = SMB2_echo,
3011         .query_path_info = smb2_query_path_info,
3012         .get_srv_inum = smb2_get_srv_inum,
3013         .query_file_info = smb2_query_file_info,
3014         .set_path_size = smb2_set_path_size,
3015         .set_file_size = smb2_set_file_size,
3016         .set_file_info = smb2_set_file_info,
3017         .set_compression = smb2_set_compression,
3018         .mkdir = smb2_mkdir,
3019         .mkdir_setinfo = smb2_mkdir_setinfo,
3020         .rmdir = smb2_rmdir,
3021         .unlink = smb2_unlink,
3022         .rename = smb2_rename_path,
3023         .create_hardlink = smb2_create_hardlink,
3024         .query_symlink = smb2_query_symlink,
3025         .query_mf_symlink = smb3_query_mf_symlink,
3026         .create_mf_symlink = smb3_create_mf_symlink,
3027         .open = smb2_open_file,
3028         .set_fid = smb2_set_fid,
3029         .close = smb2_close_file,
3030         .flush = smb2_flush_file,
3031         .async_readv = smb2_async_readv,
3032         .async_writev = smb2_async_writev,
3033         .sync_read = smb2_sync_read,
3034         .sync_write = smb2_sync_write,
3035         .query_dir_first = smb2_query_dir_first,
3036         .query_dir_next = smb2_query_dir_next,
3037         .close_dir = smb2_close_dir,
3038         .calc_smb_size = smb2_calc_size,
3039         .is_status_pending = smb2_is_status_pending,
3040         .is_session_expired = smb2_is_session_expired,
3041         .oplock_response = smb2_oplock_response,
3042         .queryfs = smb2_queryfs,
3043         .mand_lock = smb2_mand_lock,
3044         .mand_unlock_range = smb2_unlock_range,
3045         .push_mand_locks = smb2_push_mandatory_locks,
3046         .get_lease_key = smb2_get_lease_key,
3047         .set_lease_key = smb2_set_lease_key,
3048         .new_lease_key = smb2_new_lease_key,
3049         .calc_signature = smb2_calc_signature,
3050         .is_read_op = smb2_is_read_op,
3051         .set_oplock_level = smb2_set_oplock_level,
3052         .create_lease_buf = smb2_create_lease_buf,
3053         .parse_lease_buf = smb2_parse_lease_buf,
3054         .copychunk_range = smb2_copychunk_range,
3055         .wp_retry_size = smb2_wp_retry_size,
3056         .dir_needs_close = smb2_dir_needs_close,
3057         .get_dfs_refer = smb2_get_dfs_refer,
3058         .select_sectype = smb2_select_sectype,
3059 #ifdef CONFIG_CIFS_XATTR
3060         .query_all_EAs = smb2_query_eas,
3061         .set_EA = smb2_set_ea,
3062 #endif /* CIFS_XATTR */
3063 #ifdef CONFIG_CIFS_ACL
3064         .get_acl = get_smb2_acl,
3065         .get_acl_by_fid = get_smb2_acl_by_fid,
3066         .set_acl = set_smb2_acl,
3067 #endif /* CIFS_ACL */
3068         .next_header = smb2_next_header,
3069 };
3070
3071 struct smb_version_operations smb21_operations = {
3072         .compare_fids = smb2_compare_fids,
3073         .setup_request = smb2_setup_request,
3074         .setup_async_request = smb2_setup_async_request,
3075         .check_receive = smb2_check_receive,
3076         .add_credits = smb2_add_credits,
3077         .set_credits = smb2_set_credits,
3078         .get_credits_field = smb2_get_credits_field,
3079         .get_credits = smb2_get_credits,
3080         .wait_mtu_credits = smb2_wait_mtu_credits,
3081         .get_next_mid = smb2_get_next_mid,
3082         .read_data_offset = smb2_read_data_offset,
3083         .read_data_length = smb2_read_data_length,
3084         .map_error = map_smb2_to_linux_error,
3085         .find_mid = smb2_find_mid,
3086         .check_message = smb2_check_message,
3087         .dump_detail = smb2_dump_detail,
3088         .clear_stats = smb2_clear_stats,
3089         .print_stats = smb2_print_stats,
3090         .is_oplock_break = smb2_is_valid_oplock_break,
3091         .handle_cancelled_mid = smb2_handle_cancelled_mid,
3092         .downgrade_oplock = smb2_downgrade_oplock,
3093         .need_neg = smb2_need_neg,
3094         .negotiate = smb2_negotiate,
3095         .negotiate_wsize = smb2_negotiate_wsize,
3096         .negotiate_rsize = smb2_negotiate_rsize,
3097         .sess_setup = SMB2_sess_setup,
3098         .logoff = SMB2_logoff,
3099         .tree_connect = SMB2_tcon,
3100         .tree_disconnect = SMB2_tdis,
3101         .qfs_tcon = smb2_qfs_tcon,
3102         .is_path_accessible = smb2_is_path_accessible,
3103         .can_echo = smb2_can_echo,
3104         .echo = SMB2_echo,
3105         .query_path_info = smb2_query_path_info,
3106         .get_srv_inum = smb2_get_srv_inum,
3107         .query_file_info = smb2_query_file_info,
3108         .set_path_size = smb2_set_path_size,
3109         .set_file_size = smb2_set_file_size,
3110         .set_file_info = smb2_set_file_info,
3111         .set_compression = smb2_set_compression,
3112         .mkdir = smb2_mkdir,
3113         .mkdir_setinfo = smb2_mkdir_setinfo,
3114         .rmdir = smb2_rmdir,
3115         .unlink = smb2_unlink,
3116         .rename = smb2_rename_path,
3117         .create_hardlink = smb2_create_hardlink,
3118         .query_symlink = smb2_query_symlink,
3119         .query_mf_symlink = smb3_query_mf_symlink,
3120         .create_mf_symlink = smb3_create_mf_symlink,
3121         .open = smb2_open_file,
3122         .set_fid = smb2_set_fid,
3123         .close = smb2_close_file,
3124         .flush = smb2_flush_file,
3125         .async_readv = smb2_async_readv,
3126         .async_writev = smb2_async_writev,
3127         .sync_read = smb2_sync_read,
3128         .sync_write = smb2_sync_write,
3129         .query_dir_first = smb2_query_dir_first,
3130         .query_dir_next = smb2_query_dir_next,
3131         .close_dir = smb2_close_dir,
3132         .calc_smb_size = smb2_calc_size,
3133         .is_status_pending = smb2_is_status_pending,
3134         .is_session_expired = smb2_is_session_expired,
3135         .oplock_response = smb2_oplock_response,
3136         .queryfs = smb2_queryfs,
3137         .mand_lock = smb2_mand_lock,
3138         .mand_unlock_range = smb2_unlock_range,
3139         .push_mand_locks = smb2_push_mandatory_locks,
3140         .get_lease_key = smb2_get_lease_key,
3141         .set_lease_key = smb2_set_lease_key,
3142         .new_lease_key = smb2_new_lease_key,
3143         .calc_signature = smb2_calc_signature,
3144         .is_read_op = smb21_is_read_op,
3145         .set_oplock_level = smb21_set_oplock_level,
3146         .create_lease_buf = smb2_create_lease_buf,
3147         .parse_lease_buf = smb2_parse_lease_buf,
3148         .copychunk_range = smb2_copychunk_range,
3149         .wp_retry_size = smb2_wp_retry_size,
3150         .dir_needs_close = smb2_dir_needs_close,
3151         .enum_snapshots = smb3_enum_snapshots,
3152         .get_dfs_refer = smb2_get_dfs_refer,
3153         .select_sectype = smb2_select_sectype,
3154 #ifdef CONFIG_CIFS_XATTR
3155         .query_all_EAs = smb2_query_eas,
3156         .set_EA = smb2_set_ea,
3157 #endif /* CIFS_XATTR */
3158 #ifdef CONFIG_CIFS_ACL
3159         .get_acl = get_smb2_acl,
3160         .get_acl_by_fid = get_smb2_acl_by_fid,
3161         .set_acl = set_smb2_acl,
3162 #endif /* CIFS_ACL */
3163         .next_header = smb2_next_header,
3164 };
3165
3166 struct smb_version_operations smb30_operations = {
3167         .compare_fids = smb2_compare_fids,
3168         .setup_request = smb2_setup_request,
3169         .setup_async_request = smb2_setup_async_request,
3170         .check_receive = smb2_check_receive,
3171         .add_credits = smb2_add_credits,
3172         .set_credits = smb2_set_credits,
3173         .get_credits_field = smb2_get_credits_field,
3174         .get_credits = smb2_get_credits,
3175         .wait_mtu_credits = smb2_wait_mtu_credits,
3176         .get_next_mid = smb2_get_next_mid,
3177         .read_data_offset = smb2_read_data_offset,
3178         .read_data_length = smb2_read_data_length,
3179         .map_error = map_smb2_to_linux_error,
3180         .find_mid = smb2_find_mid,
3181         .check_message = smb2_check_message,
3182         .dump_detail = smb2_dump_detail,
3183         .clear_stats = smb2_clear_stats,
3184         .print_stats = smb2_print_stats,
3185         .dump_share_caps = smb2_dump_share_caps,
3186         .is_oplock_break = smb2_is_valid_oplock_break,
3187         .handle_cancelled_mid = smb2_handle_cancelled_mid,
3188         .downgrade_oplock = smb2_downgrade_oplock,
3189         .need_neg = smb2_need_neg,
3190         .negotiate = smb2_negotiate,
3191         .negotiate_wsize = smb2_negotiate_wsize,
3192         .negotiate_rsize = smb2_negotiate_rsize,
3193         .sess_setup = SMB2_sess_setup,
3194         .logoff = SMB2_logoff,
3195         .tree_connect = SMB2_tcon,
3196         .tree_disconnect = SMB2_tdis,
3197         .qfs_tcon = smb3_qfs_tcon,
3198         .is_path_accessible = smb2_is_path_accessible,
3199         .can_echo = smb2_can_echo,
3200         .echo = SMB2_echo,
3201         .query_path_info = smb2_query_path_info,
3202         .get_srv_inum = smb2_get_srv_inum,
3203         .query_file_info = smb2_query_file_info,
3204         .set_path_size = smb2_set_path_size,
3205         .set_file_size = smb2_set_file_size,
3206         .set_file_info = smb2_set_file_info,
3207         .set_compression = smb2_set_compression,
3208         .mkdir = smb2_mkdir,
3209         .mkdir_setinfo = smb2_mkdir_setinfo,
3210         .rmdir = smb2_rmdir,
3211         .unlink = smb2_unlink,
3212         .rename = smb2_rename_path,
3213         .create_hardlink = smb2_create_hardlink,
3214         .query_symlink = smb2_query_symlink,
3215         .query_mf_symlink = smb3_query_mf_symlink,
3216         .create_mf_symlink = smb3_create_mf_symlink,
3217         .open = smb2_open_file,
3218         .set_fid = smb2_set_fid,
3219         .close = smb2_close_file,
3220         .flush = smb2_flush_file,
3221         .async_readv = smb2_async_readv,
3222         .async_writev = smb2_async_writev,
3223         .sync_read = smb2_sync_read,
3224         .sync_write = smb2_sync_write,
3225         .query_dir_first = smb2_query_dir_first,
3226         .query_dir_next = smb2_query_dir_next,
3227         .close_dir = smb2_close_dir,
3228         .calc_smb_size = smb2_calc_size,
3229         .is_status_pending = smb2_is_status_pending,
3230         .is_session_expired = smb2_is_session_expired,
3231         .oplock_response = smb2_oplock_response,
3232         .queryfs = smb2_queryfs,
3233         .mand_lock = smb2_mand_lock,
3234         .mand_unlock_range = smb2_unlock_range,
3235         .push_mand_locks = smb2_push_mandatory_locks,
3236         .get_lease_key = smb2_get_lease_key,
3237         .set_lease_key = smb2_set_lease_key,
3238         .new_lease_key = smb2_new_lease_key,
3239         .generate_signingkey = generate_smb30signingkey,
3240         .calc_signature = smb3_calc_signature,
3241         .set_integrity  = smb3_set_integrity,
3242         .is_read_op = smb21_is_read_op,
3243         .set_oplock_level = smb3_set_oplock_level,
3244         .create_lease_buf = smb3_create_lease_buf,
3245         .parse_lease_buf = smb3_parse_lease_buf,
3246         .copychunk_range = smb2_copychunk_range,
3247         .duplicate_extents = smb2_duplicate_extents,
3248         .validate_negotiate = smb3_validate_negotiate,
3249         .wp_retry_size = smb2_wp_retry_size,
3250         .dir_needs_close = smb2_dir_needs_close,
3251         .fallocate = smb3_fallocate,
3252         .enum_snapshots = smb3_enum_snapshots,
3253         .init_transform_rq = smb3_init_transform_rq,
3254         .free_transform_rq = smb3_free_transform_rq,
3255         .is_transform_hdr = smb3_is_transform_hdr,
3256         .receive_transform = smb3_receive_transform,
3257         .get_dfs_refer = smb2_get_dfs_refer,
3258         .select_sectype = smb2_select_sectype,
3259 #ifdef CONFIG_CIFS_XATTR
3260         .query_all_EAs = smb2_query_eas,
3261         .set_EA = smb2_set_ea,
3262 #endif /* CIFS_XATTR */
3263 #ifdef CONFIG_CIFS_ACL
3264         .get_acl = get_smb2_acl,
3265         .get_acl_by_fid = get_smb2_acl_by_fid,
3266         .set_acl = set_smb2_acl,
3267 #endif /* CIFS_ACL */
3268         .next_header = smb2_next_header,
3269 };
3270
3271 #ifdef CONFIG_CIFS_SMB311
3272 struct smb_version_operations smb311_operations = {
3273         .compare_fids = smb2_compare_fids,
3274         .setup_request = smb2_setup_request,
3275         .setup_async_request = smb2_setup_async_request,
3276         .check_receive = smb2_check_receive,
3277         .add_credits = smb2_add_credits,
3278         .set_credits = smb2_set_credits,
3279         .get_credits_field = smb2_get_credits_field,
3280         .get_credits = smb2_get_credits,
3281         .wait_mtu_credits = smb2_wait_mtu_credits,
3282         .get_next_mid = smb2_get_next_mid,
3283         .read_data_offset = smb2_read_data_offset,
3284         .read_data_length = smb2_read_data_length,
3285         .map_error = map_smb2_to_linux_error,
3286         .find_mid = smb2_find_mid,
3287         .check_message = smb2_check_message,
3288         .dump_detail = smb2_dump_detail,
3289         .clear_stats = smb2_clear_stats,
3290         .print_stats = smb2_print_stats,
3291         .dump_share_caps = smb2_dump_share_caps,
3292         .is_oplock_break = smb2_is_valid_oplock_break,
3293         .handle_cancelled_mid = smb2_handle_cancelled_mid,
3294         .downgrade_oplock = smb2_downgrade_oplock,
3295         .need_neg = smb2_need_neg,
3296         .negotiate = smb2_negotiate,
3297         .negotiate_wsize = smb2_negotiate_wsize,
3298         .negotiate_rsize = smb2_negotiate_rsize,
3299         .sess_setup = SMB2_sess_setup,
3300         .logoff = SMB2_logoff,
3301         .tree_connect = SMB2_tcon,
3302         .tree_disconnect = SMB2_tdis,
3303         .qfs_tcon = smb3_qfs_tcon,
3304         .is_path_accessible = smb2_is_path_accessible,
3305         .can_echo = smb2_can_echo,
3306         .echo = SMB2_echo,
3307         .query_path_info = smb2_query_path_info,
3308         .get_srv_inum = smb2_get_srv_inum,
3309         .query_file_info = smb2_query_file_info,
3310         .set_path_size = smb2_set_path_size,
3311         .set_file_size = smb2_set_file_size,
3312         .set_file_info = smb2_set_file_info,
3313         .set_compression = smb2_set_compression,
3314         .mkdir = smb2_mkdir,
3315         .mkdir_setinfo = smb2_mkdir_setinfo,
3316         .rmdir = smb2_rmdir,
3317         .unlink = smb2_unlink,
3318         .rename = smb2_rename_path,
3319         .create_hardlink = smb2_create_hardlink,
3320         .query_symlink = smb2_query_symlink,
3321         .query_mf_symlink = smb3_query_mf_symlink,
3322         .create_mf_symlink = smb3_create_mf_symlink,
3323         .open = smb2_open_file,
3324         .set_fid = smb2_set_fid,
3325         .close = smb2_close_file,
3326         .flush = smb2_flush_file,
3327         .async_readv = smb2_async_readv,
3328         .async_writev = smb2_async_writev,
3329         .sync_read = smb2_sync_read,
3330         .sync_write = smb2_sync_write,
3331         .query_dir_first = smb2_query_dir_first,
3332         .query_dir_next = smb2_query_dir_next,
3333         .close_dir = smb2_close_dir,
3334         .calc_smb_size = smb2_calc_size,
3335         .is_status_pending = smb2_is_status_pending,
3336         .is_session_expired = smb2_is_session_expired,
3337         .oplock_response = smb2_oplock_response,
3338         .queryfs = smb2_queryfs,
3339         .mand_lock = smb2_mand_lock,
3340         .mand_unlock_range = smb2_unlock_range,
3341         .push_mand_locks = smb2_push_mandatory_locks,
3342         .get_lease_key = smb2_get_lease_key,
3343         .set_lease_key = smb2_set_lease_key,
3344         .new_lease_key = smb2_new_lease_key,
3345         .generate_signingkey = generate_smb311signingkey,
3346         .calc_signature = smb3_calc_signature,
3347         .set_integrity  = smb3_set_integrity,
3348         .is_read_op = smb21_is_read_op,
3349         .set_oplock_level = smb3_set_oplock_level,
3350         .create_lease_buf = smb3_create_lease_buf,
3351         .parse_lease_buf = smb3_parse_lease_buf,
3352         .copychunk_range = smb2_copychunk_range,
3353         .duplicate_extents = smb2_duplicate_extents,
3354 /*      .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
3355         .wp_retry_size = smb2_wp_retry_size,
3356         .dir_needs_close = smb2_dir_needs_close,
3357         .fallocate = smb3_fallocate,
3358         .enum_snapshots = smb3_enum_snapshots,
3359         .init_transform_rq = smb3_init_transform_rq,
3360         .free_transform_rq = smb3_free_transform_rq,
3361         .is_transform_hdr = smb3_is_transform_hdr,
3362         .receive_transform = smb3_receive_transform,
3363         .get_dfs_refer = smb2_get_dfs_refer,
3364         .select_sectype = smb2_select_sectype,
3365 #ifdef CONFIG_CIFS_XATTR
3366         .query_all_EAs = smb2_query_eas,
3367         .set_EA = smb2_set_ea,
3368 #endif /* CIFS_XATTR */
3369         .next_header = smb2_next_header,
3370 };
3371 #endif /* CIFS_SMB311 */
3372
3373 struct smb_version_values smb20_values = {
3374         .version_string = SMB20_VERSION_STRING,
3375         .protocol_id = SMB20_PROT_ID,
3376         .req_capabilities = 0, /* MBZ */
3377         .large_lock_type = 0,
3378         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3379         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3380         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3381         .header_size = sizeof(struct smb2_sync_hdr),
3382         .header_preamble_size = 0,
3383         .max_header_size = MAX_SMB2_HDR_SIZE,
3384         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3385         .lock_cmd = SMB2_LOCK,
3386         .cap_unix = 0,
3387         .cap_nt_find = SMB2_NT_FIND,
3388         .cap_large_files = SMB2_LARGE_FILES,
3389         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3390         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3391         .create_lease_size = sizeof(struct create_lease),
3392 };
3393
3394 struct smb_version_values smb21_values = {
3395         .version_string = SMB21_VERSION_STRING,
3396         .protocol_id = SMB21_PROT_ID,
3397         .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
3398         .large_lock_type = 0,
3399         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3400         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3401         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3402         .header_size = sizeof(struct smb2_sync_hdr),
3403         .header_preamble_size = 0,
3404         .max_header_size = MAX_SMB2_HDR_SIZE,
3405         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3406         .lock_cmd = SMB2_LOCK,
3407         .cap_unix = 0,
3408         .cap_nt_find = SMB2_NT_FIND,
3409         .cap_large_files = SMB2_LARGE_FILES,
3410         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3411         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3412         .create_lease_size = sizeof(struct create_lease),
3413 };
3414
3415 struct smb_version_values smb3any_values = {
3416         .version_string = SMB3ANY_VERSION_STRING,
3417         .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
3418         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
3419         .large_lock_type = 0,
3420         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3421         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3422         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3423         .header_size = sizeof(struct smb2_sync_hdr),
3424         .header_preamble_size = 0,
3425         .max_header_size = MAX_SMB2_HDR_SIZE,
3426         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3427         .lock_cmd = SMB2_LOCK,
3428         .cap_unix = 0,
3429         .cap_nt_find = SMB2_NT_FIND,
3430         .cap_large_files = SMB2_LARGE_FILES,
3431         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3432         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3433         .create_lease_size = sizeof(struct create_lease_v2),
3434 };
3435
3436 struct smb_version_values smbdefault_values = {
3437         .version_string = SMBDEFAULT_VERSION_STRING,
3438         .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
3439         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
3440         .large_lock_type = 0,
3441         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3442         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3443         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3444         .header_size = sizeof(struct smb2_sync_hdr),
3445         .header_preamble_size = 0,
3446         .max_header_size = MAX_SMB2_HDR_SIZE,
3447         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3448         .lock_cmd = SMB2_LOCK,
3449         .cap_unix = 0,
3450         .cap_nt_find = SMB2_NT_FIND,
3451         .cap_large_files = SMB2_LARGE_FILES,
3452         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3453         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3454         .create_lease_size = sizeof(struct create_lease_v2),
3455 };
3456
3457 struct smb_version_values smb30_values = {
3458         .version_string = SMB30_VERSION_STRING,
3459         .protocol_id = SMB30_PROT_ID,
3460         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
3461         .large_lock_type = 0,
3462         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3463         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3464         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3465         .header_size = sizeof(struct smb2_sync_hdr),
3466         .header_preamble_size = 0,
3467         .max_header_size = MAX_SMB2_HDR_SIZE,
3468         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3469         .lock_cmd = SMB2_LOCK,
3470         .cap_unix = 0,
3471         .cap_nt_find = SMB2_NT_FIND,
3472         .cap_large_files = SMB2_LARGE_FILES,
3473         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3474         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3475         .create_lease_size = sizeof(struct create_lease_v2),
3476 };
3477
3478 struct smb_version_values smb302_values = {
3479         .version_string = SMB302_VERSION_STRING,
3480         .protocol_id = SMB302_PROT_ID,
3481         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
3482         .large_lock_type = 0,
3483         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3484         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3485         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3486         .header_size = sizeof(struct smb2_sync_hdr),
3487         .header_preamble_size = 0,
3488         .max_header_size = MAX_SMB2_HDR_SIZE,
3489         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3490         .lock_cmd = SMB2_LOCK,
3491         .cap_unix = 0,
3492         .cap_nt_find = SMB2_NT_FIND,
3493         .cap_large_files = SMB2_LARGE_FILES,
3494         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3495         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3496         .create_lease_size = sizeof(struct create_lease_v2),
3497 };
3498
3499 #ifdef CONFIG_CIFS_SMB311
3500 struct smb_version_values smb311_values = {
3501         .version_string = SMB311_VERSION_STRING,
3502         .protocol_id = SMB311_PROT_ID,
3503         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
3504         .large_lock_type = 0,
3505         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3506         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3507         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3508         .header_size = sizeof(struct smb2_sync_hdr),
3509         .header_preamble_size = 0,
3510         .max_header_size = MAX_SMB2_HDR_SIZE,
3511         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3512         .lock_cmd = SMB2_LOCK,
3513         .cap_unix = 0,
3514         .cap_nt_find = SMB2_NT_FIND,
3515         .cap_large_files = SMB2_LARGE_FILES,
3516         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3517         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3518         .create_lease_size = sizeof(struct create_lease_v2),
3519 };
3520 #endif /* SMB311 */