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 /* Change credits for different ops and return the total number of credits */
  38 static int
  39 change_conf(struct TCP_Server_Info *server)
  40 {
  41         server->credits += server->echo_credits + server->oplock_credits;
  42         server->oplock_credits = server->echo_credits = 0;
  43         switch (server->credits) {
  44         case 0:
  45                 return 0;
  46         case 1:
  47                 server->echoes = false;
  48                 server->oplocks = false;
  49                 break;
  50         case 2:
  51                 server->echoes = true;
  52                 server->oplocks = false;
  53                 server->echo_credits = 1;
  54                 break;
  55         default:
  56                 server->echoes = true;
  57                 if (enable_oplocks) {
  58                         server->oplocks = true;
  59                         server->oplock_credits = 1;
  60                 } else
  61                         server->oplocks = false;
  62
  63                 server->echo_credits = 1;
  64         }
  65         server->credits -= server->echo_credits + server->oplock_credits;
  66         return server->credits + server->echo_credits + server->oplock_credits;
  67 }
  68
  69 static void
  70 smb2_add_credits(struct TCP_Server_Info *server,
  71                  const struct cifs_credits *credits, const int optype)
  72 {
  73         int *val, rc = -1;
  74         unsigned int add = credits->value;
  75         unsigned int instance = credits->instance;
  76         bool reconnect_detected = false;
  77
  78         spin_lock(&server->req_lock);
  79         val = server->ops->get_credits_field(server, optype);
  80
  81         /* eg found case where write overlapping reconnect messed up credits */
  82         if (((optype & CIFS_OP_MASK) == CIFS_NEG_OP) && (*val != 0))
  83                 trace_smb3_reconnect_with_invalid_credits(server->CurrentMid,
  84                         server->hostname, *val);
  85         if ((instance == 0) || (instance == server->reconnect_instance))
  86                 *val += add;
  87         else
  88                 reconnect_detected = true;
  89
  90         if (*val > 65000) {
  91                 *val = 65000; /* Don't get near 64K credits, avoid srv bugs */
  92                 printk_once(KERN_WARNING "server overflowed SMB3 credits\n");
  93         }
  94         server->in_flight--;
  95         if (server->in_flight == 0 && (optype & CIFS_OP_MASK) != CIFS_NEG_OP)
  96                 rc = change_conf(server);
  97         /*
  98          * Sometimes server returns 0 credits on oplock break ack - we need to
  99          * rebalance credits in this case.
 100          */
 101         else if (server->in_flight > 0 && server->oplock_credits == 0 &&
 102                  server->oplocks) {
 103                 if (server->credits > 1) {
 104                         server->credits--;
 105                         server->oplock_credits++;
 106                 }
 107         }
 108         spin_unlock(&server->req_lock);
 109         wake_up(&server->request_q);
 110
 111         if (reconnect_detected)
 112                 cifs_dbg(FYI, "trying to put %d credits from the old server instance %d\n",
 113                          add, instance);
 114
 115         if (server->tcpStatus == CifsNeedReconnect
 116             || server->tcpStatus == CifsExiting)
 117                 return;
 118
 119         switch (rc) {
 120         case -1:
 121                 /* change_conf hasn't been executed */
 122                 break;
 123         case 0:
 124                 cifs_dbg(VFS, "Possible client or server bug - zero credits\n");
 125                 break;
 126         case 1:
 127                 cifs_dbg(VFS, "disabling echoes and oplocks\n");
 128                 break;
 129         case 2:
 130                 cifs_dbg(FYI, "disabling oplocks\n");
 131                 break;
 132         default:
 133                 cifs_dbg(FYI, "add %u credits total=%d\n", add, rc);
 134         }
 135 }
 136
 137 static void
 138 smb2_set_credits(struct TCP_Server_Info *server, const int val)
 139 {
 140         spin_lock(&server->req_lock);
 141         server->credits = val;
 142         if (val == 1)
 143                 server->reconnect_instance++;
 144         spin_unlock(&server->req_lock);
 145         /* don't log while holding the lock */
 146         if (val == 1)
 147                 cifs_dbg(FYI, "set credits to 1 due to smb2 reconnect\n");
 148 }
 149
 150 static int *
 151 smb2_get_credits_field(struct TCP_Server_Info *server, const int optype)
 152 {
 153         switch (optype) {
 154         case CIFS_ECHO_OP:
 155                 return &server->echo_credits;
 156         case CIFS_OBREAK_OP:
 157                 return &server->oplock_credits;
 158         default:
 159                 return &server->credits;
 160         }
 161 }
 162
 163 static unsigned int
 164 smb2_get_credits(struct mid_q_entry *mid)
 165 {
 166         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)mid->resp_buf;
 167
 168         if (mid->mid_state == MID_RESPONSE_RECEIVED
 169             || mid->mid_state == MID_RESPONSE_MALFORMED)
 170                 return le16_to_cpu(shdr->CreditRequest);
 171
 172         return 0;
 173 }
 174
 175 static int
 176 smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size,
 177                       unsigned int *num, struct cifs_credits *credits)
 178 {
 179         int rc = 0;
 180         unsigned int scredits;
 181
 182         spin_lock(&server->req_lock);
 183         while (1) {
 184                 if (server->credits <= 0) {
 185                         spin_unlock(&server->req_lock);
 186                         cifs_num_waiters_inc(server);
 187                         rc = wait_event_killable(server->request_q,
 188                                         has_credits(server, &server->credits));
 189                         cifs_num_waiters_dec(server);
 190                         if (rc)
 191                                 return rc;
 192                         spin_lock(&server->req_lock);
 193                 } else {
 194                         if (server->tcpStatus == CifsExiting) {
 195                                 spin_unlock(&server->req_lock);
 196                                 return -ENOENT;
 197                         }
 198
 199                         scredits = server->credits;
 200                         /* can deadlock with reopen */
 201                         if (scredits <= 8) {
 202                                 *num = SMB2_MAX_BUFFER_SIZE;
 203                                 credits->value = 0;
 204                                 credits->instance = 0;
 205                                 break;
 206                         }
 207
 208                         /* leave some credits for reopen and other ops */
 209                         scredits -= 8;
 210                         *num = min_t(unsigned int, size,
 211                                      scredits * SMB2_MAX_BUFFER_SIZE);
 212
 213                         credits->value =
 214                                 DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE);
 215                         credits->instance = server->reconnect_instance;
 216                         server->credits -= credits->value;
 217                         server->in_flight++;
 218                         break;
 219                 }
 220         }
 221         spin_unlock(&server->req_lock);
 222         return rc;
 223 }
 224
 225 static int
 226 smb2_adjust_credits(struct TCP_Server_Info *server,
 227                     struct cifs_credits *credits,
 228                     const unsigned int payload_size)
 229 {
 230         int new_val = DIV_ROUND_UP(payload_size, SMB2_MAX_BUFFER_SIZE);
 231
 232         if (!credits->value || credits->value == new_val)
 233                 return 0;
 234
 235         if (credits->value < new_val) {
 236                 WARN_ONCE(1, "request has less credits (%d) than required (%d)",
 237                           credits->value, new_val);
 238                 return -ENOTSUPP;
 239         }
 240
 241         spin_lock(&server->req_lock);
 242
 243         if (server->reconnect_instance != credits->instance) {
 244                 spin_unlock(&server->req_lock);
 245                 cifs_dbg(VFS, "trying to return %d credits to old session\n",
 246                          credits->value - new_val);
 247                 return -EAGAIN;
 248         }
 249
 250         server->credits += credits->value - new_val;
 251         spin_unlock(&server->req_lock);
 252         wake_up(&server->request_q);
 253         credits->value = new_val;
 254         return 0;
 255 }
 256
 257 static __u64
 258 smb2_get_next_mid(struct TCP_Server_Info *server)
 259 {
 260         __u64 mid;
 261         /* for SMB2 we need the current value */
 262         spin_lock(&GlobalMid_Lock);
 263         mid = server->CurrentMid++;
 264         spin_unlock(&GlobalMid_Lock);
 265         return mid;
 266 }
 267
 268 static void
 269 smb2_revert_current_mid(struct TCP_Server_Info *server, const unsigned int val)
 270 {
 271         spin_lock(&GlobalMid_Lock);
 272         if (server->CurrentMid >= val)
 273                 server->CurrentMid -= val;
 274         spin_unlock(&GlobalMid_Lock);
 275 }
 276
 277 static struct mid_q_entry *
 278 smb2_find_mid(struct TCP_Server_Info *server, char *buf)
 279 {
 280         struct mid_q_entry *mid;
 281         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
 282         __u64 wire_mid = le64_to_cpu(shdr->MessageId);
 283
 284         if (shdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {
 285                 cifs_dbg(VFS, "encrypted frame parsing not supported yet");
 286                 return NULL;
 287         }
 288
 289         spin_lock(&GlobalMid_Lock);
 290         list_for_each_entry(mid, &server->pending_mid_q, qhead) {
 291                 if ((mid->mid == wire_mid) &&
 292                     (mid->mid_state == MID_REQUEST_SUBMITTED) &&
 293                     (mid->command == shdr->Command)) {
 294                         kref_get(&mid->refcount);
 295                         spin_unlock(&GlobalMid_Lock);
 296                         return mid;
 297                 }
 298         }
 299         spin_unlock(&GlobalMid_Lock);
 300         return NULL;
 301 }
 302
 303 static void
 304 smb2_dump_detail(void *buf, struct TCP_Server_Info *server)
 305 {
 306 #ifdef CONFIG_CIFS_DEBUG2
 307         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
 308
 309         cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
 310                  shdr->Command, shdr->Status, shdr->Flags, shdr->MessageId,
 311                  shdr->ProcessId);
 312         cifs_dbg(VFS, "smb buf %p len %u\n", buf,
 313                  server->ops->calc_smb_size(buf, server));
 314 #endif
 315 }
 316
 317 static bool
 318 smb2_need_neg(struct TCP_Server_Info *server)
 319 {
 320         return server->max_read == 0;
 321 }
 322
 323 static int
 324 smb2_negotiate(const unsigned int xid, struct cifs_ses *ses)
 325 {
 326         int rc;
 327         ses->server->CurrentMid = 0;
 328         rc = SMB2_negotiate(xid, ses);
 329         /* BB we probably don't need to retry with modern servers */
 330         if (rc == -EAGAIN)
 331                 rc = -EHOSTDOWN;
 332         return rc;
 333 }
 334
 335 static unsigned int
 336 smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 337 {
 338         struct TCP_Server_Info *server = tcon->ses->server;
 339         unsigned int wsize;
 340
 341         /* start with specified wsize, or default */
 342         wsize = volume_info->wsize ? volume_info->wsize : CIFS_DEFAULT_IOSIZE;
 343         wsize = min_t(unsigned int, wsize, server->max_write);
 344 #ifdef CONFIG_CIFS_SMB_DIRECT
 345         if (server->rdma) {
 346                 if (server->sign)
 347                         wsize = min_t(unsigned int,
 348                                 wsize, server->smbd_conn->max_fragmented_send_size);
 349                 else
 350                         wsize = min_t(unsigned int,
 351                                 wsize, server->smbd_conn->max_readwrite_size);
 352         }
 353 #endif
 354         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 355                 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
 356
 357         return wsize;
 358 }
 359
 360 static unsigned int
 361 smb3_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 362 {
 363         struct TCP_Server_Info *server = tcon->ses->server;
 364         unsigned int wsize;
 365
 366         /* start with specified wsize, or default */
 367         wsize = volume_info->wsize ? volume_info->wsize : SMB3_DEFAULT_IOSIZE;
 368         wsize = min_t(unsigned int, wsize, server->max_write);
 369 #ifdef CONFIG_CIFS_SMB_DIRECT
 370         if (server->rdma) {
 371                 if (server->sign)
 372                         wsize = min_t(unsigned int,
 373                                 wsize, server->smbd_conn->max_fragmented_send_size);
 374                 else
 375                         wsize = min_t(unsigned int,
 376                                 wsize, server->smbd_conn->max_readwrite_size);
 377         }
 378 #endif
 379         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 380                 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
 381
 382         return wsize;
 383 }
 384
 385 static unsigned int
 386 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 387 {
 388         struct TCP_Server_Info *server = tcon->ses->server;
 389         unsigned int rsize;
 390
 391         /* start with specified rsize, or default */
 392         rsize = volume_info->rsize ? volume_info->rsize : CIFS_DEFAULT_IOSIZE;
 393         rsize = min_t(unsigned int, rsize, server->max_read);
 394 #ifdef CONFIG_CIFS_SMB_DIRECT
 395         if (server->rdma) {
 396                 if (server->sign)
 397                         rsize = min_t(unsigned int,
 398                                 rsize, server->smbd_conn->max_fragmented_recv_size);
 399                 else
 400                         rsize = min_t(unsigned int,
 401                                 rsize, server->smbd_conn->max_readwrite_size);
 402         }
 403 #endif
 404
 405         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 406                 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
 407
 408         return rsize;
 409 }
 410
 411 static unsigned int
 412 smb3_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 413 {
 414         struct TCP_Server_Info *server = tcon->ses->server;
 415         unsigned int rsize;
 416
 417         /* start with specified rsize, or default */
 418         rsize = volume_info->rsize ? volume_info->rsize : SMB3_DEFAULT_IOSIZE;
 419         rsize = min_t(unsigned int, rsize, server->max_read);
 420 #ifdef CONFIG_CIFS_SMB_DIRECT
 421         if (server->rdma) {
 422                 if (server->sign)
 423                         rsize = min_t(unsigned int,
 424                                 rsize, server->smbd_conn->max_fragmented_recv_size);
 425                 else
 426                         rsize = min_t(unsigned int,
 427                                 rsize, server->smbd_conn->max_readwrite_size);
 428         }
 429 #endif
 430
 431         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 432                 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
 433
 434         return rsize;
 435 }
 436
 437 static int
 438 parse_server_interfaces(struct network_interface_info_ioctl_rsp *buf,
 439                         size_t buf_len,
 440                         struct cifs_server_iface **iface_list,
 441                         size_t *iface_count)
 442 {
 443         struct network_interface_info_ioctl_rsp *p;
 444         struct sockaddr_in *addr4;
 445         struct sockaddr_in6 *addr6;
 446         struct iface_info_ipv4 *p4;
 447         struct iface_info_ipv6 *p6;
 448         struct cifs_server_iface *info;
 449         ssize_t bytes_left;
 450         size_t next = 0;
 451         int nb_iface = 0;
 452         int rc = 0;
 453
 454         *iface_list = NULL;
 455         *iface_count = 0;
 456
 457         /*
 458          * Fist pass: count and sanity check
 459          */
 460
 461         bytes_left = buf_len;
 462         p = buf;
 463         while (bytes_left >= sizeof(*p)) {
 464                 nb_iface++;
 465                 next = le32_to_cpu(p->Next);
 466                 if (!next) {
 467                         bytes_left -= sizeof(*p);
 468                         break;
 469                 }
 470                 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next);
 471                 bytes_left -= next;
 472         }
 473
 474         if (!nb_iface) {
 475                 cifs_dbg(VFS, "%s: malformed interface info\n", __func__);
 476                 rc = -EINVAL;
 477                 goto out;
 478         }
 479
 480         if (bytes_left || p->Next)
 481                 cifs_dbg(VFS, "%s: incomplete interface info\n", __func__);
 482
 483
 484         /*
 485          * Second pass: extract info to internal structure
 486          */
 487
 488         *iface_list = kcalloc(nb_iface, sizeof(**iface_list), GFP_KERNEL);
 489         if (!*iface_list) {
 490                 rc = -ENOMEM;
 491                 goto out;
 492         }
 493
 494         info = *iface_list;
 495         bytes_left = buf_len;
 496         p = buf;
 497         while (bytes_left >= sizeof(*p)) {
 498                 info->speed = le64_to_cpu(p->LinkSpeed);
 499                 info->rdma_capable = le32_to_cpu(p->Capability & RDMA_CAPABLE);
 500                 info->rss_capable = le32_to_cpu(p->Capability & RSS_CAPABLE);
 501
 502                 cifs_dbg(FYI, "%s: adding iface %zu\n", __func__, *iface_count);
 503                 cifs_dbg(FYI, "%s: speed %zu bps\n", __func__, info->speed);
 504                 cifs_dbg(FYI, "%s: capabilities 0x%08x\n", __func__,
 505                          le32_to_cpu(p->Capability));
 506
 507                 switch (p->Family) {
 508                 /*
 509                  * The kernel and wire socket structures have the same
 510                  * layout and use network byte order but make the
 511                  * conversion explicit in case either one changes.
 512                  */
 513                 case INTERNETWORK:
 514                         addr4 = (struct sockaddr_in *)&info->sockaddr;
 515                         p4 = (struct iface_info_ipv4 *)p->Buffer;
 516                         addr4->sin_family = AF_INET;
 517                         memcpy(&addr4->sin_addr, &p4->IPv4Address, 4);
 518
 519                         /* [MS-SMB2] 2.2.32.5.1.1 Clients MUST ignore these */
 520                         addr4->sin_port = cpu_to_be16(CIFS_PORT);
 521
 522                         cifs_dbg(FYI, "%s: ipv4 %pI4\n", __func__,
 523                                  &addr4->sin_addr);
 524                         break;
 525                 case INTERNETWORKV6:
 526                         addr6 = (struct sockaddr_in6 *)&info->sockaddr;
 527                         p6 = (struct iface_info_ipv6 *)p->Buffer;
 528                         addr6->sin6_family = AF_INET6;
 529                         memcpy(&addr6->sin6_addr, &p6->IPv6Address, 16);
 530
 531                         /* [MS-SMB2] 2.2.32.5.1.2 Clients MUST ignore these */
 532                         addr6->sin6_flowinfo = 0;
 533                         addr6->sin6_scope_id = 0;
 534                         addr6->sin6_port = cpu_to_be16(CIFS_PORT);
 535
 536                         cifs_dbg(FYI, "%s: ipv6 %pI6\n", __func__,
 537                                  &addr6->sin6_addr);
 538                         break;
 539                 default:
 540                         cifs_dbg(VFS,
 541                                  "%s: skipping unsupported socket family\n",
 542                                  __func__);
 543                         goto next_iface;
 544                 }
 545
 546                 (*iface_count)++;
 547                 info++;
 548 next_iface:
 549                 next = le32_to_cpu(p->Next);
 550                 if (!next)
 551                         break;
 552                 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next);
 553                 bytes_left -= next;
 554         }
 555
 556         if (!*iface_count) {
 557                 rc = -EINVAL;
 558                 goto out;
 559         }
 560
 561 out:
 562         if (rc) {
 563                 kfree(*iface_list);
 564                 *iface_count = 0;
 565                 *iface_list = NULL;
 566         }
 567         return rc;
 568 }
 569
 570
 571 static int
 572 SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon)
 573 {
 574         int rc;
 575         unsigned int ret_data_len = 0;
 576         struct network_interface_info_ioctl_rsp *out_buf = NULL;
 577         struct cifs_server_iface *iface_list;
 578         size_t iface_count;
 579         struct cifs_ses *ses = tcon->ses;
 580
 581         rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
 582                         FSCTL_QUERY_NETWORK_INTERFACE_INFO, true /* is_fsctl */,
 583                         NULL /* no data input */, 0 /* no data input */,
 584                         (char **)&out_buf, &ret_data_len);
 585         if (rc == -EOPNOTSUPP) {
 586                 cifs_dbg(FYI,
 587                          "server does not support query network interfaces\n");
 588                 goto out;
 589         } else if (rc != 0) {
 590                 cifs_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
 591                 goto out;
 592         }
 593
 594         rc = parse_server_interfaces(out_buf, ret_data_len,
 595                                      &iface_list, &iface_count);
 596         if (rc)
 597                 goto out;
 598
 599         spin_lock(&ses->iface_lock);
 600         kfree(ses->iface_list);
 601         ses->iface_list = iface_list;
 602         ses->iface_count = iface_count;
 603         ses->iface_last_update = jiffies;
 604         spin_unlock(&ses->iface_lock);
 605
 606 out:
 607         kfree(out_buf);
 608         return rc;
 609 }
 610
 611 static void
 612 smb2_close_cached_fid(struct kref *ref)
 613 {
 614         struct cached_fid *cfid = container_of(ref, struct cached_fid,
 615                                                refcount);
 616
 617         if (cfid->is_valid) {
 618                 cifs_dbg(FYI, "clear cached root file handle\n");
 619                 SMB2_close(0, cfid->tcon, cfid->fid->persistent_fid,
 620                            cfid->fid->volatile_fid);
 621                 cfid->is_valid = false;
 622         }
 623 }
 624
 625 void close_shroot(struct cached_fid *cfid)
 626 {
 627         mutex_lock(&cfid->fid_mutex);
 628         kref_put(&cfid->refcount, smb2_close_cached_fid);
 629         mutex_unlock(&cfid->fid_mutex);
 630 }
 631
 632 void
 633 smb2_cached_lease_break(struct work_struct *work)
 634 {
 635         struct cached_fid *cfid = container_of(work,
 636                                 struct cached_fid, lease_break);
 637
 638         close_shroot(cfid);
 639 }
 640
 641 /*
 642  * Open the directory at the root of a share
 643  */
 644 int open_shroot(unsigned int xid, struct cifs_tcon *tcon, struct cifs_fid *pfid)
 645 {
 646         struct cifs_open_parms oparams;
 647         int rc;
 648         __le16 srch_path = 0; /* Null - since an open of top of share */
 649         u8 oplock = SMB2_OPLOCK_LEVEL_II;
 650
 651         mutex_lock(&tcon->crfid.fid_mutex);
 652         if (tcon->crfid.is_valid) {
 653                 cifs_dbg(FYI, "found a cached root file handle\n");
 654                 memcpy(pfid, tcon->crfid.fid, sizeof(struct cifs_fid));
 655                 kref_get(&tcon->crfid.refcount);
 656                 mutex_unlock(&tcon->crfid.fid_mutex);
 657                 return 0;
 658         }
 659
 660         oparams.tcon = tcon;
 661         oparams.create_options = 0;
 662         oparams.desired_access = FILE_READ_ATTRIBUTES;
 663         oparams.disposition = FILE_OPEN;
 664         oparams.fid = pfid;
 665         oparams.reconnect = false;
 666
 667         rc = SMB2_open(xid, &oparams, &srch_path, &oplock, NULL, NULL, NULL);
 668         if (rc == 0) {
 669                 memcpy(tcon->crfid.fid, pfid, sizeof(struct cifs_fid));
 670                 tcon->crfid.tcon = tcon;
 671                 tcon->crfid.is_valid = true;
 672                 kref_init(&tcon->crfid.refcount);
 673                 kref_get(&tcon->crfid.refcount);
 674         }
 675         mutex_unlock(&tcon->crfid.fid_mutex);
 676         return rc;
 677 }
 678
 679 static void
 680 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
 681 {
 682         int rc;
 683         __le16 srch_path = 0; /* Null - open root of share */
 684         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 685         struct cifs_open_parms oparms;
 686         struct cifs_fid fid;
 687         bool no_cached_open = tcon->nohandlecache;
 688
 689         oparms.tcon = tcon;
 690         oparms.desired_access = FILE_READ_ATTRIBUTES;
 691         oparms.disposition = FILE_OPEN;
 692         oparms.create_options = 0;
 693         oparms.fid = &fid;
 694         oparms.reconnect = false;
 695
 696         if (no_cached_open)
 697                 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
 698                                NULL);
 699         else
 700                 rc = open_shroot(xid, tcon, &fid);
 701
 702         if (rc)
 703                 return;
 704
 705         SMB3_request_interfaces(xid, tcon);
 706
 707         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 708                         FS_ATTRIBUTE_INFORMATION);
 709         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 710                         FS_DEVICE_INFORMATION);
 711         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 712                         FS_VOLUME_INFORMATION);
 713         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 714                         FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
 715         if (no_cached_open)
 716                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 717         else
 718                 close_shroot(&tcon->crfid);
 719
 720         return;
 721 }
 722
 723 static void
 724 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
 725 {
 726         int rc;
 727         __le16 srch_path = 0; /* Null - open root of share */
 728         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 729         struct cifs_open_parms oparms;
 730         struct cifs_fid fid;
 731
 732         oparms.tcon = tcon;
 733         oparms.desired_access = FILE_READ_ATTRIBUTES;
 734         oparms.disposition = FILE_OPEN;
 735         oparms.create_options = 0;
 736         oparms.fid = &fid;
 737         oparms.reconnect = false;
 738
 739         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, NULL);
 740         if (rc)
 741                 return;
 742
 743         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 744                         FS_ATTRIBUTE_INFORMATION);
 745         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 746                         FS_DEVICE_INFORMATION);
 747         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 748         return;
 749 }
 750
 751 static int
 752 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
 753                         struct cifs_sb_info *cifs_sb, const char *full_path)
 754 {
 755         int rc;
 756         __le16 *utf16_path;
 757         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 758         struct cifs_open_parms oparms;
 759         struct cifs_fid fid;
 760
 761         if ((*full_path == 0) && tcon->crfid.is_valid)
 762                 return 0;
 763
 764         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
 765         if (!utf16_path)
 766                 return -ENOMEM;
 767
 768         oparms.tcon = tcon;
 769         oparms.desired_access = FILE_READ_ATTRIBUTES;
 770         oparms.disposition = FILE_OPEN;
 771         if (backup_cred(cifs_sb))
 772                 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
 773         else
 774                 oparms.create_options = 0;
 775         oparms.fid = &fid;
 776         oparms.reconnect = false;
 777
 778         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
 779         if (rc) {
 780                 kfree(utf16_path);
 781                 return rc;
 782         }
 783
 784         rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 785         kfree(utf16_path);
 786         return rc;
 787 }
 788
 789 static int
 790 smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
 791                   struct cifs_sb_info *cifs_sb, const char *full_path,
 792                   u64 *uniqueid, FILE_ALL_INFO *data)
 793 {
 794         *uniqueid = le64_to_cpu(data->IndexNumber);
 795         return 0;
 796 }
 797
 798 static int
 799 smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
 800                      struct cifs_fid *fid, FILE_ALL_INFO *data)
 801 {
 802         int rc;
 803         struct smb2_file_all_info *smb2_data;
 804
 805         smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
 806                             GFP_KERNEL);
 807         if (smb2_data == NULL)
 808                 return -ENOMEM;
 809
 810         rc = SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid,
 811                              smb2_data);
 812         if (!rc)
 813                 move_smb2_info_to_cifs(data, smb2_data);
 814         kfree(smb2_data);
 815         return rc;
 816 }
 817
 818 #ifdef CONFIG_CIFS_XATTR
 819 static ssize_t
 820 move_smb2_ea_to_cifs(char *dst, size_t dst_size,
 821                      struct smb2_file_full_ea_info *src, size_t src_size,
 822                      const unsigned char *ea_name)
 823 {
 824         int rc = 0;
 825         unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0;
 826         char *name, *value;
 827         size_t buf_size = dst_size;
 828         size_t name_len, value_len, user_name_len;
 829
 830         while (src_size > 0) {
 831                 name = &src->ea_data[0];
 832                 name_len = (size_t)src->ea_name_length;
 833                 value = &src->ea_data[src->ea_name_length + 1];
 834                 value_len = (size_t)le16_to_cpu(src->ea_value_length);
 835
 836                 if (name_len == 0) {
 837                         break;
 838                 }
 839
 840                 if (src_size < 8 + name_len + 1 + value_len) {
 841                         cifs_dbg(FYI, "EA entry goes beyond length of list\n");
 842                         rc = -EIO;
 843                         goto out;
 844                 }
 845
 846                 if (ea_name) {
 847                         if (ea_name_len == name_len &&
 848                             memcmp(ea_name, name, name_len) == 0) {
 849                                 rc = value_len;
 850                                 if (dst_size == 0)
 851                                         goto out;
 852                                 if (dst_size < value_len) {
 853                                         rc = -ERANGE;
 854                                         goto out;
 855                                 }
 856                                 memcpy(dst, value, value_len);
 857                                 goto out;
 858                         }
 859                 } else {
 860                         /* 'user.' plus a terminating null */
 861                         user_name_len = 5 + 1 + name_len;
 862
 863                         if (buf_size == 0) {
 864                                 /* skip copy - calc size only */
 865                                 rc += user_name_len;
 866                         } else if (dst_size >= user_name_len) {
 867                                 dst_size -= user_name_len;
 868                                 memcpy(dst, "user.", 5);
 869                                 dst += 5;
 870                                 memcpy(dst, src->ea_data, name_len);
 871                                 dst += name_len;
 872                                 *dst = 0;
 873                                 ++dst;
 874                                 rc += user_name_len;
 875                         } else {
 876                                 /* stop before overrun buffer */
 877                                 rc = -ERANGE;
 878                                 break;
 879                         }
 880                 }
 881
 882                 if (!src->next_entry_offset)
 883                         break;
 884
 885                 if (src_size < le32_to_cpu(src->next_entry_offset)) {
 886                         /* stop before overrun buffer */
 887                         rc = -ERANGE;
 888                         break;
 889                 }
 890                 src_size -= le32_to_cpu(src->next_entry_offset);
 891                 src = (void *)((char *)src +
 892                                le32_to_cpu(src->next_entry_offset));
 893         }
 894
 895         /* didn't find the named attribute */
 896         if (ea_name)
 897                 rc = -ENODATA;
 898
 899 out:
 900         return (ssize_t)rc;
 901 }
 902
 903 static ssize_t
 904 smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon,
 905                const unsigned char *path, const unsigned char *ea_name,
 906                char *ea_data, size_t buf_size,
 907                struct cifs_sb_info *cifs_sb)
 908 {
 909         int rc;
 910         __le16 *utf16_path;
 911         struct kvec rsp_iov = {NULL, 0};
 912         int buftype = CIFS_NO_BUFFER;
 913         struct smb2_query_info_rsp *rsp;
 914         struct smb2_file_full_ea_info *info = NULL;
 915
 916         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
 917         if (!utf16_path)
 918                 return -ENOMEM;
 919
 920         rc = smb2_query_info_compound(xid, tcon, utf16_path,
 921                                       FILE_READ_EA,
 922                                       FILE_FULL_EA_INFORMATION,
 923                                       SMB2_O_INFO_FILE,
 924                                       CIFSMaxBufSize -
 925                                       MAX_SMB2_CREATE_RESPONSE_SIZE -
 926                                       MAX_SMB2_CLOSE_RESPONSE_SIZE,
 927                                       &rsp_iov, &buftype, cifs_sb);
 928         if (rc) {
 929                 /*
 930                  * If ea_name is NULL (listxattr) and there are no EAs,
 931                  * return 0 as it's not an error. Otherwise, the specified
 932                  * ea_name was not found.
 933                  */
 934                 if (!ea_name && rc == -ENODATA)
 935                         rc = 0;
 936                 goto qeas_exit;
 937         }
 938
 939         rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
 940         rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
 941                                le32_to_cpu(rsp->OutputBufferLength),
 942                                &rsp_iov,
 943                                sizeof(struct smb2_file_full_ea_info));
 944         if (rc)
 945                 goto qeas_exit;
 946
 947         info = (struct smb2_file_full_ea_info *)(
 948                         le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
 949         rc = move_smb2_ea_to_cifs(ea_data, buf_size, info,
 950                         le32_to_cpu(rsp->OutputBufferLength), ea_name);
 951
 952  qeas_exit:
 953         kfree(utf16_path);
 954         free_rsp_buf(buftype, rsp_iov.iov_base);
 955         return rc;
 956 }
 957
 958
 959 static int
 960 smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
 961             const char *path, const char *ea_name, const void *ea_value,
 962             const __u16 ea_value_len, const struct nls_table *nls_codepage,
 963             struct cifs_sb_info *cifs_sb)
 964 {
 965         struct cifs_ses *ses = tcon->ses;
 966         __le16 *utf16_path = NULL;
 967         int ea_name_len = strlen(ea_name);
 968         int flags = 0;
 969         int len;
 970         struct smb_rqst rqst[3];
 971         int resp_buftype[3];
 972         struct kvec rsp_iov[3];
 973         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
 974         struct cifs_open_parms oparms;
 975         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 976         struct cifs_fid fid;
 977         struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE];
 978         unsigned int size[1];
 979         void *data[1];
 980         struct smb2_file_full_ea_info *ea = NULL;
 981         struct kvec close_iov[1];
 982         int rc;
 983
 984         if (smb3_encryption_required(tcon))
 985                 flags |= CIFS_TRANSFORM_REQ;
 986
 987         if (ea_name_len > 255)
 988                 return -EINVAL;
 989
 990         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
 991         if (!utf16_path)
 992                 return -ENOMEM;
 993
 994         memset(rqst, 0, sizeof(rqst));
 995         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
 996         memset(rsp_iov, 0, sizeof(rsp_iov));
 997
 998         if (ses->server->ops->query_all_EAs) {
 999                 if (!ea_value) {
1000                         rc = ses->server->ops->query_all_EAs(xid, tcon, path,
1001                                                              ea_name, NULL, 0,
1002                                                              cifs_sb);
1003                         if (rc == -ENODATA)
1004                                 goto sea_exit;
1005                 }
1006         }
1007
1008         /* Open */
1009         memset(&open_iov, 0, sizeof(open_iov));
1010         rqst[0].rq_iov = open_iov;
1011         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1012
1013         memset(&oparms, 0, sizeof(oparms));
1014         oparms.tcon = tcon;
1015         oparms.desired_access = FILE_WRITE_EA;
1016         oparms.disposition = FILE_OPEN;
1017         if (backup_cred(cifs_sb))
1018                 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
1019         else
1020                 oparms.create_options = 0;
1021         oparms.fid = &fid;
1022         oparms.reconnect = false;
1023
1024         rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, utf16_path);
1025         if (rc)
1026                 goto sea_exit;
1027         smb2_set_next_command(tcon, &rqst[0]);
1028
1029
1030         /* Set Info */
1031         memset(&si_iov, 0, sizeof(si_iov));
1032         rqst[1].rq_iov = si_iov;
1033         rqst[1].rq_nvec = 1;
1034
1035         len = sizeof(ea) + ea_name_len + ea_value_len + 1;
1036         ea = kzalloc(len, GFP_KERNEL);
1037         if (ea == NULL) {
1038                 rc = -ENOMEM;
1039                 goto sea_exit;
1040         }
1041
1042         ea->ea_name_length = ea_name_len;
1043         ea->ea_value_length = cpu_to_le16(ea_value_len);
1044         memcpy(ea->ea_data, ea_name, ea_name_len + 1);
1045         memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len);
1046
1047         size[0] = len;
1048         data[0] = ea;
1049
1050         rc = SMB2_set_info_init(tcon, &rqst[1], COMPOUND_FID,
1051                                 COMPOUND_FID, current->tgid,
1052                                 FILE_FULL_EA_INFORMATION,
1053                                 SMB2_O_INFO_FILE, 0, data, size);
1054         smb2_set_next_command(tcon, &rqst[1]);
1055         smb2_set_related(&rqst[1]);
1056
1057
1058         /* Close */
1059         memset(&close_iov, 0, sizeof(close_iov));
1060         rqst[2].rq_iov = close_iov;
1061         rqst[2].rq_nvec = 1;
1062         rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID);
1063         smb2_set_related(&rqst[2]);
1064
1065         rc = compound_send_recv(xid, ses, flags, 3, rqst,
1066                                 resp_buftype, rsp_iov);
1067
1068  sea_exit:
1069         kfree(ea);
1070         kfree(utf16_path);
1071         SMB2_open_free(&rqst[0]);
1072         SMB2_set_info_free(&rqst[1]);
1073         SMB2_close_free(&rqst[2]);
1074         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1075         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1076         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1077         return rc;
1078 }
1079 #endif
1080
1081 static bool
1082 smb2_can_echo(struct TCP_Server_Info *server)
1083 {
1084         return server->echoes;
1085 }
1086
1087 static void
1088 smb2_clear_stats(struct cifs_tcon *tcon)
1089 {
1090         int i;
1091         for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
1092                 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
1093                 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
1094         }
1095 }
1096
1097 static void
1098 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
1099 {
1100         seq_puts(m, "\n\tShare Capabilities:");
1101         if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
1102                 seq_puts(m, " DFS,");
1103         if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
1104                 seq_puts(m, " CONTINUOUS AVAILABILITY,");
1105         if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
1106                 seq_puts(m, " SCALEOUT,");
1107         if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
1108                 seq_puts(m, " CLUSTER,");
1109         if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
1110                 seq_puts(m, " ASYMMETRIC,");
1111         if (tcon->capabilities == 0)
1112                 seq_puts(m, " None");
1113         if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
1114                 seq_puts(m, " Aligned,");
1115         if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
1116                 seq_puts(m, " Partition Aligned,");
1117         if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
1118                 seq_puts(m, " SSD,");
1119         if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
1120                 seq_puts(m, " TRIM-support,");
1121
1122         seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
1123         seq_printf(m, "\n\ttid: 0x%x", tcon->tid);
1124         if (tcon->perf_sector_size)
1125                 seq_printf(m, "\tOptimal sector size: 0x%x",
1126                            tcon->perf_sector_size);
1127         seq_printf(m, "\tMaximal Access: 0x%x", tcon->maximal_access);
1128 }
1129
1130 static void
1131 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
1132 {
1133         atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
1134         atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
1135
1136         /*
1137          *  Can't display SMB2_NEGOTIATE, SESSION_SETUP, LOGOFF, CANCEL and ECHO
1138          *  totals (requests sent) since those SMBs are per-session not per tcon
1139          */
1140         seq_printf(m, "\nBytes read: %llu  Bytes written: %llu",
1141                    (long long)(tcon->bytes_read),
1142                    (long long)(tcon->bytes_written));
1143         seq_printf(m, "\nOpen files: %d total (local), %d open on server",
1144                    atomic_read(&tcon->num_local_opens),
1145                    atomic_read(&tcon->num_remote_opens));
1146         seq_printf(m, "\nTreeConnects: %d total %d failed",
1147                    atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
1148                    atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
1149         seq_printf(m, "\nTreeDisconnects: %d total %d failed",
1150                    atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
1151                    atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
1152         seq_printf(m, "\nCreates: %d total %d failed",
1153                    atomic_read(&sent[SMB2_CREATE_HE]),
1154                    atomic_read(&failed[SMB2_CREATE_HE]));
1155         seq_printf(m, "\nCloses: %d total %d failed",
1156                    atomic_read(&sent[SMB2_CLOSE_HE]),
1157                    atomic_read(&failed[SMB2_CLOSE_HE]));
1158         seq_printf(m, "\nFlushes: %d total %d failed",
1159                    atomic_read(&sent[SMB2_FLUSH_HE]),
1160                    atomic_read(&failed[SMB2_FLUSH_HE]));
1161         seq_printf(m, "\nReads: %d total %d failed",
1162                    atomic_read(&sent[SMB2_READ_HE]),
1163                    atomic_read(&failed[SMB2_READ_HE]));
1164         seq_printf(m, "\nWrites: %d total %d failed",
1165                    atomic_read(&sent[SMB2_WRITE_HE]),
1166                    atomic_read(&failed[SMB2_WRITE_HE]));
1167         seq_printf(m, "\nLocks: %d total %d failed",
1168                    atomic_read(&sent[SMB2_LOCK_HE]),
1169                    atomic_read(&failed[SMB2_LOCK_HE]));
1170         seq_printf(m, "\nIOCTLs: %d total %d failed",
1171                    atomic_read(&sent[SMB2_IOCTL_HE]),
1172                    atomic_read(&failed[SMB2_IOCTL_HE]));
1173         seq_printf(m, "\nQueryDirectories: %d total %d failed",
1174                    atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
1175                    atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
1176         seq_printf(m, "\nChangeNotifies: %d total %d failed",
1177                    atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
1178                    atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
1179         seq_printf(m, "\nQueryInfos: %d total %d failed",
1180                    atomic_read(&sent[SMB2_QUERY_INFO_HE]),
1181                    atomic_read(&failed[SMB2_QUERY_INFO_HE]));
1182         seq_printf(m, "\nSetInfos: %d total %d failed",
1183                    atomic_read(&sent[SMB2_SET_INFO_HE]),
1184                    atomic_read(&failed[SMB2_SET_INFO_HE]));
1185         seq_printf(m, "\nOplockBreaks: %d sent %d failed",
1186                    atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
1187                    atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
1188 }
1189
1190 static void
1191 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
1192 {
1193         struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
1194         struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
1195
1196         cfile->fid.persistent_fid = fid->persistent_fid;
1197         cfile->fid.volatile_fid = fid->volatile_fid;
1198 #ifdef CONFIG_CIFS_DEBUG2
1199         cfile->fid.mid = fid->mid;
1200 #endif /* CIFS_DEBUG2 */
1201         server->ops->set_oplock_level(cinode, oplock, fid->epoch,
1202                                       &fid->purge_cache);
1203         cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
1204         memcpy(cfile->fid.create_guid, fid->create_guid, 16);
1205 }
1206
1207 static void
1208 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
1209                 struct cifs_fid *fid)
1210 {
1211         SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1212 }
1213
1214 static int
1215 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
1216                      u64 persistent_fid, u64 volatile_fid,
1217                      struct copychunk_ioctl *pcchunk)
1218 {
1219         int rc;
1220         unsigned int ret_data_len;
1221         struct resume_key_req *res_key;
1222
1223         rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
1224                         FSCTL_SRV_REQUEST_RESUME_KEY, true /* is_fsctl */,
1225                         NULL, 0 /* no input */,
1226                         (char **)&res_key, &ret_data_len);
1227
1228         if (rc) {
1229                 cifs_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
1230                 goto req_res_key_exit;
1231         }
1232         if (ret_data_len < sizeof(struct resume_key_req)) {
1233                 cifs_dbg(VFS, "Invalid refcopy resume key length\n");
1234                 rc = -EINVAL;
1235                 goto req_res_key_exit;
1236         }
1237         memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
1238
1239 req_res_key_exit:
1240         kfree(res_key);
1241         return rc;
1242 }
1243
1244 static int
1245 smb2_ioctl_query_info(const unsigned int xid,
1246                       struct cifs_tcon *tcon,
1247                       __le16 *path, int is_dir,
1248                       unsigned long p)
1249 {
1250         struct cifs_ses *ses = tcon->ses;
1251         char __user *arg = (char __user *)p;
1252         struct smb_query_info qi;
1253         struct smb_query_info __user *pqi;
1254         int rc = 0;
1255         int flags = 0;
1256         struct smb2_query_info_rsp *rsp = NULL;
1257         void *buffer = NULL;
1258         struct smb_rqst rqst[3];
1259         int resp_buftype[3];
1260         struct kvec rsp_iov[3];
1261         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
1262         struct cifs_open_parms oparms;
1263         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1264         struct cifs_fid fid;
1265         struct kvec qi_iov[1];
1266         struct kvec close_iov[1];
1267
1268         memset(rqst, 0, sizeof(rqst));
1269         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1270         memset(rsp_iov, 0, sizeof(rsp_iov));
1271
1272         if (copy_from_user(&qi, arg, sizeof(struct smb_query_info)))
1273                 return -EFAULT;
1274
1275         if (qi.output_buffer_length > 1024)
1276                 return -EINVAL;
1277
1278         if (!ses || !(ses->server))
1279                 return -EIO;
1280
1281         if (smb3_encryption_required(tcon))
1282                 flags |= CIFS_TRANSFORM_REQ;
1283
1284         buffer = kmalloc(qi.output_buffer_length, GFP_KERNEL);
1285         if (buffer == NULL)
1286                 return -ENOMEM;
1287
1288         if (copy_from_user(buffer, arg + sizeof(struct smb_query_info),
1289                            qi.output_buffer_length)) {
1290                 rc = -EFAULT;
1291                 goto iqinf_exit;
1292         }
1293
1294         /* Open */
1295         memset(&open_iov, 0, sizeof(open_iov));
1296         rqst[0].rq_iov = open_iov;
1297         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1298
1299         memset(&oparms, 0, sizeof(oparms));
1300         oparms.tcon = tcon;
1301         oparms.desired_access = FILE_READ_ATTRIBUTES | READ_CONTROL;
1302         oparms.disposition = FILE_OPEN;
1303         if (is_dir)
1304                 oparms.create_options = CREATE_NOT_FILE;
1305         else
1306                 oparms.create_options = CREATE_NOT_DIR;
1307         oparms.fid = &fid;
1308         oparms.reconnect = false;
1309
1310         rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, path);
1311         if (rc)
1312                 goto iqinf_exit;
1313         smb2_set_next_command(tcon, &rqst[0]);
1314
1315         /* Query */
1316         memset(&qi_iov, 0, sizeof(qi_iov));
1317         rqst[1].rq_iov = qi_iov;
1318         rqst[1].rq_nvec = 1;
1319
1320         rc = SMB2_query_info_init(tcon, &rqst[1], COMPOUND_FID, COMPOUND_FID,
1321                                   qi.file_info_class, qi.info_type,
1322                                   qi.additional_information,
1323                                   qi.input_buffer_length,
1324                                   qi.output_buffer_length, buffer);
1325         if (rc)
1326                 goto iqinf_exit;
1327         smb2_set_next_command(tcon, &rqst[1]);
1328         smb2_set_related(&rqst[1]);
1329
1330         /* Close */
1331         memset(&close_iov, 0, sizeof(close_iov));
1332         rqst[2].rq_iov = close_iov;
1333         rqst[2].rq_nvec = 1;
1334
1335         rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID);
1336         if (rc)
1337                 goto iqinf_exit;
1338         smb2_set_related(&rqst[2]);
1339
1340         rc = compound_send_recv(xid, ses, flags, 3, rqst,
1341                                 resp_buftype, rsp_iov);
1342         if (rc)
1343                 goto iqinf_exit;
1344         pqi = (struct smb_query_info __user *)arg;
1345         rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
1346         if (le32_to_cpu(rsp->OutputBufferLength) < qi.input_buffer_length)
1347                 qi.input_buffer_length = le32_to_cpu(rsp->OutputBufferLength);
1348         if (copy_to_user(&pqi->input_buffer_length, &qi.input_buffer_length,
1349                          sizeof(qi.input_buffer_length))) {
1350                 rc = -EFAULT;
1351                 goto iqinf_exit;
1352         }
1353         if (copy_to_user(pqi + 1, rsp->Buffer, qi.input_buffer_length)) {
1354                 rc = -EFAULT;
1355                 goto iqinf_exit;
1356         }
1357
1358  iqinf_exit:
1359         kfree(buffer);
1360         SMB2_open_free(&rqst[0]);
1361         SMB2_query_info_free(&rqst[1]);
1362         SMB2_close_free(&rqst[2]);
1363         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1364         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1365         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1366         return rc;
1367 }
1368
1369 static ssize_t
1370 smb2_copychunk_range(const unsigned int xid,
1371                         struct cifsFileInfo *srcfile,
1372                         struct cifsFileInfo *trgtfile, u64 src_off,
1373                         u64 len, u64 dest_off)
1374 {
1375         int rc;
1376         unsigned int ret_data_len;
1377         struct copychunk_ioctl *pcchunk;
1378         struct copychunk_ioctl_rsp *retbuf = NULL;
1379         struct cifs_tcon *tcon;
1380         int chunks_copied = 0;
1381         bool chunk_sizes_updated = false;
1382         ssize_t bytes_written, total_bytes_written = 0;
1383
1384         pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
1385
1386         if (pcchunk == NULL)
1387                 return -ENOMEM;
1388
1389         cifs_dbg(FYI, "in smb2_copychunk_range - about to call request res key\n");
1390         /* Request a key from the server to identify the source of the copy */
1391         rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
1392                                 srcfile->fid.persistent_fid,
1393                                 srcfile->fid.volatile_fid, pcchunk);
1394
1395         /* Note: request_res_key sets res_key null only if rc !=0 */
1396         if (rc)
1397                 goto cchunk_out;
1398
1399         /* For now array only one chunk long, will make more flexible later */
1400         pcchunk->ChunkCount = cpu_to_le32(1);
1401         pcchunk->Reserved = 0;
1402         pcchunk->Reserved2 = 0;
1403
1404         tcon = tlink_tcon(trgtfile->tlink);
1405
1406         while (len > 0) {
1407                 pcchunk->SourceOffset = cpu_to_le64(src_off);
1408                 pcchunk->TargetOffset = cpu_to_le64(dest_off);
1409                 pcchunk->Length =
1410                         cpu_to_le32(min_t(u32, len, tcon->max_bytes_chunk));
1411
1412                 /* Request server copy to target from src identified by key */
1413                 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1414                         trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
1415                         true /* is_fsctl */, (char *)pcchunk,
1416                         sizeof(struct copychunk_ioctl), (char **)&retbuf,
1417                         &ret_data_len);
1418                 if (rc == 0) {
1419                         if (ret_data_len !=
1420                                         sizeof(struct copychunk_ioctl_rsp)) {
1421                                 cifs_dbg(VFS, "invalid cchunk response size\n");
1422                                 rc = -EIO;
1423                                 goto cchunk_out;
1424                         }
1425                         if (retbuf->TotalBytesWritten == 0) {
1426                                 cifs_dbg(FYI, "no bytes copied\n");
1427                                 rc = -EIO;
1428                                 goto cchunk_out;
1429                         }
1430                         /*
1431                          * Check if server claimed to write more than we asked
1432                          */
1433                         if (le32_to_cpu(retbuf->TotalBytesWritten) >
1434                             le32_to_cpu(pcchunk->Length)) {
1435                                 cifs_dbg(VFS, "invalid copy chunk response\n");
1436                                 rc = -EIO;
1437                                 goto cchunk_out;
1438                         }
1439                         if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
1440                                 cifs_dbg(VFS, "invalid num chunks written\n");
1441                                 rc = -EIO;
1442                                 goto cchunk_out;
1443                         }
1444                         chunks_copied++;
1445
1446                         bytes_written = le32_to_cpu(retbuf->TotalBytesWritten);
1447                         src_off += bytes_written;
1448                         dest_off += bytes_written;
1449                         len -= bytes_written;
1450                         total_bytes_written += bytes_written;
1451
1452                         cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n",
1453                                 le32_to_cpu(retbuf->ChunksWritten),
1454                                 le32_to_cpu(retbuf->ChunkBytesWritten),
1455                                 bytes_written);
1456                 } else if (rc == -EINVAL) {
1457                         if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
1458                                 goto cchunk_out;
1459
1460                         cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
1461                                 le32_to_cpu(retbuf->ChunksWritten),
1462                                 le32_to_cpu(retbuf->ChunkBytesWritten),
1463                                 le32_to_cpu(retbuf->TotalBytesWritten));
1464
1465                         /*
1466                          * Check if this is the first request using these sizes,
1467                          * (ie check if copy succeed once with original sizes
1468                          * and check if the server gave us different sizes after
1469                          * we already updated max sizes on previous request).
1470                          * if not then why is the server returning an error now
1471                          */
1472                         if ((chunks_copied != 0) || chunk_sizes_updated)
1473                                 goto cchunk_out;
1474
1475                         /* Check that server is not asking us to grow size */
1476                         if (le32_to_cpu(retbuf->ChunkBytesWritten) <
1477                                         tcon->max_bytes_chunk)
1478                                 tcon->max_bytes_chunk =
1479                                         le32_to_cpu(retbuf->ChunkBytesWritten);
1480                         else
1481                                 goto cchunk_out; /* server gave us bogus size */
1482
1483                         /* No need to change MaxChunks since already set to 1 */
1484                         chunk_sizes_updated = true;
1485                 } else
1486                         goto cchunk_out;
1487         }
1488
1489 cchunk_out:
1490         kfree(pcchunk);
1491         kfree(retbuf);
1492         if (rc)
1493                 return rc;
1494         else
1495                 return total_bytes_written;
1496 }
1497
1498 static int
1499 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
1500                 struct cifs_fid *fid)
1501 {
1502         return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1503 }
1504
1505 static unsigned int
1506 smb2_read_data_offset(char *buf)
1507 {
1508         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1509         return rsp->DataOffset;
1510 }
1511
1512 static unsigned int
1513 smb2_read_data_length(char *buf, bool in_remaining)
1514 {
1515         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1516
1517         if (in_remaining)
1518                 return le32_to_cpu(rsp->DataRemaining);
1519
1520         return le32_to_cpu(rsp->DataLength);
1521 }
1522
1523
1524 static int
1525 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,
1526                struct cifs_io_parms *parms, unsigned int *bytes_read,
1527                char **buf, int *buf_type)
1528 {
1529         parms->persistent_fid = pfid->persistent_fid;
1530         parms->volatile_fid = pfid->volatile_fid;
1531         return SMB2_read(xid, parms, bytes_read, buf, buf_type);
1532 }
1533
1534 static int
1535 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,
1536                 struct cifs_io_parms *parms, unsigned int *written,
1537                 struct kvec *iov, unsigned long nr_segs)
1538 {
1539
1540         parms->persistent_fid = pfid->persistent_fid;
1541         parms->volatile_fid = pfid->volatile_fid;
1542         return SMB2_write(xid, parms, written, iov, nr_segs);
1543 }
1544
1545 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
1546 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
1547                 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
1548 {
1549         struct cifsInodeInfo *cifsi;
1550         int rc;
1551
1552         cifsi = CIFS_I(inode);
1553
1554         /* if file already sparse don't bother setting sparse again */
1555         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
1556                 return true; /* already sparse */
1557
1558         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
1559                 return true; /* already not sparse */
1560
1561         /*
1562          * Can't check for sparse support on share the usual way via the
1563          * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
1564          * since Samba server doesn't set the flag on the share, yet
1565          * supports the set sparse FSCTL and returns sparse correctly
1566          * in the file attributes. If we fail setting sparse though we
1567          * mark that server does not support sparse files for this share
1568          * to avoid repeatedly sending the unsupported fsctl to server
1569          * if the file is repeatedly extended.
1570          */
1571         if (tcon->broken_sparse_sup)
1572                 return false;
1573
1574         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1575                         cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
1576                         true /* is_fctl */,
1577                         &setsparse, 1, NULL, NULL);
1578         if (rc) {
1579                 tcon->broken_sparse_sup = true;
1580                 cifs_dbg(FYI, "set sparse rc = %d\n", rc);
1581                 return false;
1582         }
1583
1584         if (setsparse)
1585                 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
1586         else
1587                 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
1588
1589         return true;
1590 }
1591
1592 static int
1593 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
1594                    struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
1595 {
1596         __le64 eof = cpu_to_le64(size);
1597         struct inode *inode;
1598
1599         /*
1600          * If extending file more than one page make sparse. Many Linux fs
1601          * make files sparse by default when extending via ftruncate
1602          */
1603         inode = d_inode(cfile->dentry);
1604
1605         if (!set_alloc && (size > inode->i_size + 8192)) {
1606                 __u8 set_sparse = 1;
1607
1608                 /* whether set sparse succeeds or not, extend the file */
1609                 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
1610         }
1611
1612         return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
1613                             cfile->fid.volatile_fid, cfile->pid, &eof);
1614 }
1615
1616 static int
1617 smb2_duplicate_extents(const unsigned int xid,
1618                         struct cifsFileInfo *srcfile,
1619                         struct cifsFileInfo *trgtfile, u64 src_off,
1620                         u64 len, u64 dest_off)
1621 {
1622         int rc;
1623         unsigned int ret_data_len;
1624         struct duplicate_extents_to_file dup_ext_buf;
1625         struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink);
1626
1627         /* server fileays advertise duplicate extent support with this flag */
1628         if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) &
1629              FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0)
1630                 return -EOPNOTSUPP;
1631
1632         dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid;
1633         dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid;
1634         dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off);
1635         dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off);
1636         dup_ext_buf.ByteCount = cpu_to_le64(len);
1637         cifs_dbg(FYI, "duplicate extents: src off %lld dst off %lld len %lld",
1638                 src_off, dest_off, len);
1639
1640         rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false);
1641         if (rc)
1642                 goto duplicate_extents_out;
1643
1644         rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1645                         trgtfile->fid.volatile_fid,
1646                         FSCTL_DUPLICATE_EXTENTS_TO_FILE,
1647                         true /* is_fsctl */,
1648                         (char *)&dup_ext_buf,
1649                         sizeof(struct duplicate_extents_to_file),
1650                         NULL,
1651                         &ret_data_len);
1652
1653         if (ret_data_len > 0)
1654                 cifs_dbg(FYI, "non-zero response length in duplicate extents");
1655
1656 duplicate_extents_out:
1657         return rc;
1658 }
1659
1660 static int
1661 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
1662                    struct cifsFileInfo *cfile)
1663 {
1664         return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
1665                             cfile->fid.volatile_fid);
1666 }
1667
1668 static int
1669 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
1670                    struct cifsFileInfo *cfile)
1671 {
1672         struct fsctl_set_integrity_information_req integr_info;
1673         unsigned int ret_data_len;
1674
1675         integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED);
1676         integr_info.Flags = 0;
1677         integr_info.Reserved = 0;
1678
1679         return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1680                         cfile->fid.volatile_fid,
1681                         FSCTL_SET_INTEGRITY_INFORMATION,
1682                         true /* is_fsctl */,
1683                         (char *)&integr_info,
1684                         sizeof(struct fsctl_set_integrity_information_req),
1685                         NULL,
1686                         &ret_data_len);
1687
1688 }
1689
1690 /* GMT Token is @GMT-YYYY.MM.DD-HH.MM.SS Unicode which is 48 bytes + null */
1691 #define GMT_TOKEN_SIZE 50
1692
1693 /*
1694  * Input buffer contains (empty) struct smb_snapshot array with size filled in
1695  * For output see struct SRV_SNAPSHOT_ARRAY in MS-SMB2 section 2.2.32.2
1696  */
1697 static int
1698 smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon,
1699                    struct cifsFileInfo *cfile, void __user *ioc_buf)
1700 {
1701         char *retbuf = NULL;
1702         unsigned int ret_data_len = 0;
1703         int rc;
1704         struct smb_snapshot_array snapshot_in;
1705
1706         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1707                         cfile->fid.volatile_fid,
1708                         FSCTL_SRV_ENUMERATE_SNAPSHOTS,
1709                         true /* is_fsctl */,
1710                         NULL, 0 /* no input data */,
1711                         (char **)&retbuf,
1712                         &ret_data_len);
1713         cifs_dbg(FYI, "enum snaphots ioctl returned %d and ret buflen is %d\n",
1714                         rc, ret_data_len);
1715         if (rc)
1716                 return rc;
1717
1718         if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) {
1719                 /* Fixup buffer */
1720                 if (copy_from_user(&snapshot_in, ioc_buf,
1721                     sizeof(struct smb_snapshot_array))) {
1722                         rc = -EFAULT;
1723                         kfree(retbuf);
1724                         return rc;
1725                 }
1726
1727                 /*
1728                  * Check for min size, ie not large enough to fit even one GMT
1729                  * token (snapshot).  On the first ioctl some users may pass in
1730                  * smaller size (or zero) to simply get the size of the array
1731                  * so the user space caller can allocate sufficient memory
1732                  * and retry the ioctl again with larger array size sufficient
1733                  * to hold all of the snapshot GMT tokens on the second try.
1734                  */
1735                 if (snapshot_in.snapshot_array_size < GMT_TOKEN_SIZE)
1736                         ret_data_len = sizeof(struct smb_snapshot_array);
1737
1738                 /*
1739                  * We return struct SRV_SNAPSHOT_ARRAY, followed by
1740                  * the snapshot array (of 50 byte GMT tokens) each
1741                  * representing an available previous version of the data
1742                  */
1743                 if (ret_data_len > (snapshot_in.snapshot_array_size +
1744                                         sizeof(struct smb_snapshot_array)))
1745                         ret_data_len = snapshot_in.snapshot_array_size +
1746                                         sizeof(struct smb_snapshot_array);
1747
1748                 if (copy_to_user(ioc_buf, retbuf, ret_data_len))
1749                         rc = -EFAULT;
1750         }
1751
1752         kfree(retbuf);
1753         return rc;
1754 }
1755
1756 static int
1757 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
1758                      const char *path, struct cifs_sb_info *cifs_sb,
1759                      struct cifs_fid *fid, __u16 search_flags,
1760                      struct cifs_search_info *srch_inf)
1761 {
1762         __le16 *utf16_path;
1763         int rc;
1764         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1765         struct cifs_open_parms oparms;
1766
1767         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1768         if (!utf16_path)
1769                 return -ENOMEM;
1770
1771         oparms.tcon = tcon;
1772         oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
1773         oparms.disposition = FILE_OPEN;
1774         if (backup_cred(cifs_sb))
1775                 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
1776         else
1777                 oparms.create_options = 0;
1778         oparms.fid = fid;
1779         oparms.reconnect = false;
1780
1781         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
1782         kfree(utf16_path);
1783         if (rc) {
1784                 cifs_dbg(FYI, "open dir failed rc=%d\n", rc);
1785                 return rc;
1786         }
1787
1788         srch_inf->entries_in_buffer = 0;
1789         srch_inf->index_of_last_entry = 2;
1790
1791         rc = SMB2_query_directory(xid, tcon, fid->persistent_fid,
1792                                   fid->volatile_fid, 0, srch_inf);
1793         if (rc) {
1794                 cifs_dbg(FYI, "query directory failed rc=%d\n", rc);
1795                 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1796         }
1797         return rc;
1798 }
1799
1800 static int
1801 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
1802                     struct cifs_fid *fid, __u16 search_flags,
1803                     struct cifs_search_info *srch_inf)
1804 {
1805         return SMB2_query_directory(xid, tcon, fid->persistent_fid,
1806                                     fid->volatile_fid, 0, srch_inf);
1807 }
1808
1809 static int
1810 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
1811                struct cifs_fid *fid)
1812 {
1813         return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1814 }
1815
1816 /*
1817 * If we negotiate SMB2 protocol and get STATUS_PENDING - update
1818 * the number of credits and return true. Otherwise - return false.
1819 */
1820 static bool
1821 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server)
1822 {
1823         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
1824
1825         if (shdr->Status != STATUS_PENDING)
1826                 return false;
1827
1828         if (shdr->CreditRequest) {
1829                 spin_lock(&server->req_lock);
1830                 server->credits += le16_to_cpu(shdr->CreditRequest);
1831                 spin_unlock(&server->req_lock);
1832                 wake_up(&server->request_q);
1833         }
1834
1835         return true;
1836 }
1837
1838 static bool
1839 smb2_is_session_expired(char *buf)
1840 {
1841         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
1842
1843         if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED &&
1844             shdr->Status != STATUS_USER_SESSION_DELETED)
1845                 return false;
1846
1847         trace_smb3_ses_expired(shdr->TreeId, shdr->SessionId,
1848                                le16_to_cpu(shdr->Command),
1849                                le64_to_cpu(shdr->MessageId));
1850         cifs_dbg(FYI, "Session expired or deleted\n");
1851
1852         return true;
1853 }
1854
1855 static int
1856 smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
1857                      struct cifsInodeInfo *cinode)
1858 {
1859         if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
1860                 return SMB2_lease_break(0, tcon, cinode->lease_key,
1861                                         smb2_get_lease_state(cinode));
1862
1863         return SMB2_oplock_break(0, tcon, fid->persistent_fid,
1864                                  fid->volatile_fid,
1865                                  CIFS_CACHE_READ(cinode) ? 1 : 0);
1866 }
1867
1868 void
1869 smb2_set_related(struct smb_rqst *rqst)
1870 {
1871         struct smb2_sync_hdr *shdr;
1872
1873         shdr = (struct smb2_sync_hdr *)(rqst->rq_iov[0].iov_base);
1874         shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
1875 }
1876
1877 char smb2_padding[7] = {0, 0, 0, 0, 0, 0, 0};
1878
1879 void
1880 smb2_set_next_command(struct cifs_tcon *tcon, struct smb_rqst *rqst)
1881 {
1882         struct smb2_sync_hdr *shdr;
1883         struct cifs_ses *ses = tcon->ses;
1884         struct TCP_Server_Info *server = ses->server;
1885         unsigned long len = smb_rqst_len(server, rqst);
1886         int i, num_padding;
1887
1888         /* SMB headers in a compound are 8 byte aligned. */
1889
1890         /* No padding needed */
1891         if (!(len & 7))
1892                 goto finished;
1893
1894         num_padding = 8 - (len & 7);
1895         if (!smb3_encryption_required(tcon)) {
1896                 /*
1897                  * If we do not have encryption then we can just add an extra
1898                  * iov for the padding.
1899                  */
1900                 rqst->rq_iov[rqst->rq_nvec].iov_base = smb2_padding;
1901                 rqst->rq_iov[rqst->rq_nvec].iov_len = num_padding;
1902                 rqst->rq_nvec++;
1903                 len += num_padding;
1904         } else {
1905                 /*
1906                  * We can not add a small padding iov for the encryption case
1907                  * because the encryption framework can not handle the padding
1908                  * iovs.
1909                  * We have to flatten this into a single buffer and add
1910                  * the padding to it.
1911                  */
1912                 for (i = 1; i < rqst->rq_nvec; i++) {
1913                         memcpy(rqst->rq_iov[0].iov_base +
1914                                rqst->rq_iov[0].iov_len,
1915                                rqst->rq_iov[i].iov_base,
1916                                rqst->rq_iov[i].iov_len);
1917                         rqst->rq_iov[0].iov_len += rqst->rq_iov[i].iov_len;
1918                 }
1919                 memset(rqst->rq_iov[0].iov_base + rqst->rq_iov[0].iov_len,
1920                        0, num_padding);
1921                 rqst->rq_iov[0].iov_len += num_padding;
1922                 len += num_padding;
1923                 rqst->rq_nvec = 1;
1924         }
1925
1926  finished:
1927         shdr = (struct smb2_sync_hdr *)(rqst->rq_iov[0].iov_base);
1928         shdr->NextCommand = cpu_to_le32(len);
1929 }
1930
1931 /*
1932  * Passes the query info response back to the caller on success.
1933  * Caller need to free this with free_rsp_buf().
1934  */
1935 int
1936 smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon,
1937                          __le16 *utf16_path, u32 desired_access,
1938                          u32 class, u32 type, u32 output_len,
1939                          struct kvec *rsp, int *buftype,
1940                          struct cifs_sb_info *cifs_sb)
1941 {
1942         struct cifs_ses *ses = tcon->ses;
1943         int flags = 0;
1944         struct smb_rqst rqst[3];
1945         int resp_buftype[3];
1946         struct kvec rsp_iov[3];
1947         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
1948         struct kvec qi_iov[1];
1949         struct kvec close_iov[1];
1950         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1951         struct cifs_open_parms oparms;
1952         struct cifs_fid fid;
1953         int rc;
1954
1955         if (smb3_encryption_required(tcon))
1956                 flags |= CIFS_TRANSFORM_REQ;
1957
1958         memset(rqst, 0, sizeof(rqst));
1959         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1960         memset(rsp_iov, 0, sizeof(rsp_iov));
1961
1962         memset(&open_iov, 0, sizeof(open_iov));
1963         rqst[0].rq_iov = open_iov;
1964         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1965
1966         oparms.tcon = tcon;
1967         oparms.desired_access = desired_access;
1968         oparms.disposition = FILE_OPEN;
1969         if (cifs_sb && backup_cred(cifs_sb))
1970                 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
1971         else
1972                 oparms.create_options = 0;
1973         oparms.fid = &fid;
1974         oparms.reconnect = false;
1975
1976         rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, utf16_path);
1977         if (rc)
1978                 goto qic_exit;
1979         smb2_set_next_command(tcon, &rqst[0]);
1980
1981         memset(&qi_iov, 0, sizeof(qi_iov));
1982         rqst[1].rq_iov = qi_iov;
1983         rqst[1].rq_nvec = 1;
1984
1985         rc = SMB2_query_info_init(tcon, &rqst[1], COMPOUND_FID, COMPOUND_FID,
1986                                   class, type, 0,
1987                                   output_len, 0,
1988                                   NULL);
1989         if (rc)
1990                 goto qic_exit;
1991         smb2_set_next_command(tcon, &rqst[1]);
1992         smb2_set_related(&rqst[1]);
1993
1994         memset(&close_iov, 0, sizeof(close_iov));
1995         rqst[2].rq_iov = close_iov;
1996         rqst[2].rq_nvec = 1;
1997
1998         rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID);
1999         if (rc)
2000                 goto qic_exit;
2001         smb2_set_related(&rqst[2]);
2002
2003         rc = compound_send_recv(xid, ses, flags, 3, rqst,
2004                                 resp_buftype, rsp_iov);
2005         if (rc) {
2006                 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2007                 goto qic_exit;
2008         }
2009         *rsp = rsp_iov[1];
2010         *buftype = resp_buftype[1];
2011
2012  qic_exit:
2013         SMB2_open_free(&rqst[0]);
2014         SMB2_query_info_free(&rqst[1]);
2015         SMB2_close_free(&rqst[2]);
2016         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2017         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
2018         return rc;
2019 }
2020
2021 static int
2022 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2023              struct kstatfs *buf)
2024 {
2025         struct smb2_query_info_rsp *rsp;
2026         struct smb2_fs_full_size_info *info = NULL;
2027         __le16 utf16_path = 0; /* Null - open root of share */
2028         struct kvec rsp_iov = {NULL, 0};
2029         int buftype = CIFS_NO_BUFFER;
2030         int rc;
2031
2032
2033         rc = smb2_query_info_compound(xid, tcon, &utf16_path,
2034                                       FILE_READ_ATTRIBUTES,
2035                                       FS_FULL_SIZE_INFORMATION,
2036                                       SMB2_O_INFO_FILESYSTEM,
2037                                       sizeof(struct smb2_fs_full_size_info),
2038                                       &rsp_iov, &buftype, NULL);
2039         if (rc)
2040                 goto qfs_exit;
2041
2042         rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
2043         buf->f_type = SMB2_MAGIC_NUMBER;
2044         info = (struct smb2_fs_full_size_info *)(
2045                 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
2046         rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
2047                                le32_to_cpu(rsp->OutputBufferLength),
2048                                &rsp_iov,
2049                                sizeof(struct smb2_fs_full_size_info));
2050         if (!rc)
2051                 smb2_copy_fs_info_to_kstatfs(info, buf);
2052
2053 qfs_exit:
2054         free_rsp_buf(buftype, rsp_iov.iov_base);
2055         return rc;
2056 }
2057
2058 static int
2059 smb311_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2060              struct kstatfs *buf)
2061 {
2062         int rc;
2063         __le16 srch_path = 0; /* Null - open root of share */
2064         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2065         struct cifs_open_parms oparms;
2066         struct cifs_fid fid;
2067
2068         if (!tcon->posix_extensions)
2069                 return smb2_queryfs(xid, tcon, buf);
2070
2071         oparms.tcon = tcon;
2072         oparms.desired_access = FILE_READ_ATTRIBUTES;
2073         oparms.disposition = FILE_OPEN;
2074         oparms.create_options = 0;
2075         oparms.fid = &fid;
2076         oparms.reconnect = false;
2077
2078         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, NULL);
2079         if (rc)
2080                 return rc;
2081
2082         rc = SMB311_posix_qfs_info(xid, tcon, fid.persistent_fid,
2083                                    fid.volatile_fid, buf);
2084         buf->f_type = SMB2_MAGIC_NUMBER;
2085         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2086         return rc;
2087 }
2088
2089 static bool
2090 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
2091 {
2092         return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
2093                ob1->fid.volatile_fid == ob2->fid.volatile_fid;
2094 }
2095
2096 static int
2097 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
2098                __u64 length, __u32 type, int lock, int unlock, bool wait)
2099 {
2100         if (unlock && !lock)
2101                 type = SMB2_LOCKFLAG_UNLOCK;
2102         return SMB2_lock(xid, tlink_tcon(cfile->tlink),
2103                          cfile->fid.persistent_fid, cfile->fid.volatile_fid,
2104                          current->tgid, length, offset, type, wait);
2105 }
2106
2107 static void
2108 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
2109 {
2110         memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
2111 }
2112
2113 static void
2114 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
2115 {
2116         memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
2117 }
2118
2119 static void
2120 smb2_new_lease_key(struct cifs_fid *fid)
2121 {
2122         generate_random_uuid(fid->lease_key);
2123 }
2124
2125 static int
2126 smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,
2127                    const char *search_name,
2128                    struct dfs_info3_param **target_nodes,
2129                    unsigned int *num_of_nodes,
2130                    const struct nls_table *nls_codepage, int remap)
2131 {
2132         int rc;
2133         __le16 *utf16_path = NULL;
2134         int utf16_path_len = 0;
2135         struct cifs_tcon *tcon;
2136         struct fsctl_get_dfs_referral_req *dfs_req = NULL;
2137         struct get_dfs_referral_rsp *dfs_rsp = NULL;
2138         u32 dfs_req_size = 0, dfs_rsp_size = 0;
2139
2140         cifs_dbg(FYI, "smb2_get_dfs_refer path <%s>\n", search_name);
2141
2142         /*
2143          * Try to use the IPC tcon, otherwise just use any
2144          */
2145         tcon = ses->tcon_ipc;
2146         if (tcon == NULL) {
2147                 spin_lock(&cifs_tcp_ses_lock);
2148                 tcon = list_first_entry_or_null(&ses->tcon_list,
2149                                                 struct cifs_tcon,
2150                                                 tcon_list);
2151                 if (tcon)
2152                         tcon->tc_count++;
2153                 spin_unlock(&cifs_tcp_ses_lock);
2154         }
2155
2156         if (tcon == NULL) {
2157                 cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n",
2158                          ses);
2159                 rc = -ENOTCONN;
2160                 goto out;
2161         }
2162
2163         utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX,
2164                                            &utf16_path_len,
2165                                            nls_codepage, remap);
2166         if (!utf16_path) {
2167                 rc = -ENOMEM;
2168                 goto out;
2169         }
2170
2171         dfs_req_size = sizeof(*dfs_req) + utf16_path_len;
2172         dfs_req = kzalloc(dfs_req_size, GFP_KERNEL);
2173         if (!dfs_req) {
2174                 rc = -ENOMEM;
2175                 goto out;
2176         }
2177
2178         /* Highest DFS referral version understood */
2179         dfs_req->MaxReferralLevel = DFS_VERSION;
2180
2181         /* Path to resolve in an UTF-16 null-terminated string */
2182         memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len);
2183
2184         do {
2185                 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
2186                                 FSCTL_DFS_GET_REFERRALS,
2187                                 true /* is_fsctl */,
2188                                 (char *)dfs_req, dfs_req_size,
2189                                 (char **)&dfs_rsp, &dfs_rsp_size);
2190         } while (rc == -EAGAIN);
2191
2192         if (rc) {
2193                 if ((rc != -ENOENT) && (rc != -EOPNOTSUPP))
2194                         cifs_dbg(VFS, "ioctl error in smb2_get_dfs_refer rc=%d\n", rc);
2195                 goto out;
2196         }
2197
2198         rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size,
2199                                  num_of_nodes, target_nodes,
2200                                  nls_codepage, remap, search_name,
2201                                  true /* is_unicode */);
2202         if (rc) {
2203                 cifs_dbg(VFS, "parse error in smb2_get_dfs_refer rc=%d\n", rc);
2204                 goto out;
2205         }
2206
2207  out:
2208         if (tcon && !tcon->ipc) {
2209                 /* ipc tcons are not refcounted */
2210                 spin_lock(&cifs_tcp_ses_lock);
2211                 tcon->tc_count--;
2212                 spin_unlock(&cifs_tcp_ses_lock);
2213         }
2214         kfree(utf16_path);
2215         kfree(dfs_req);
2216         kfree(dfs_rsp);
2217         return rc;
2218 }
2219 #define SMB2_SYMLINK_STRUCT_SIZE \
2220         (sizeof(struct smb2_err_rsp) - 1 + sizeof(struct smb2_symlink_err_rsp))
2221
2222 static int
2223 smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
2224                    const char *full_path, char **target_path,
2225                    struct cifs_sb_info *cifs_sb)
2226 {
2227         int rc;
2228         __le16 *utf16_path;
2229         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2230         struct cifs_open_parms oparms;
2231         struct cifs_fid fid;
2232         struct kvec err_iov = {NULL, 0};
2233         struct smb2_err_rsp *err_buf = NULL;
2234         int resp_buftype;
2235         struct smb2_symlink_err_rsp *symlink;
2236         unsigned int sub_len;
2237         unsigned int sub_offset;
2238         unsigned int print_len;
2239         unsigned int print_offset;
2240
2241         cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
2242
2243         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
2244         if (!utf16_path)
2245                 return -ENOMEM;
2246
2247         oparms.tcon = tcon;
2248         oparms.desired_access = FILE_READ_ATTRIBUTES;
2249         oparms.disposition = FILE_OPEN;
2250         if (backup_cred(cifs_sb))
2251                 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
2252         else
2253                 oparms.create_options = 0;
2254         oparms.fid = &fid;
2255         oparms.reconnect = false;
2256
2257         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, &err_iov,
2258                        &resp_buftype);
2259         if (!rc || !err_iov.iov_base) {
2260                 rc = -ENOENT;
2261                 goto free_path;
2262         }
2263
2264         err_buf = err_iov.iov_base;
2265         if (le32_to_cpu(err_buf->ByteCount) < sizeof(struct smb2_symlink_err_rsp) ||
2266             err_iov.iov_len < SMB2_SYMLINK_STRUCT_SIZE) {
2267                 rc = -ENOENT;
2268                 goto querty_exit;
2269         }
2270
2271         /* open must fail on symlink - reset rc */
2272         rc = 0;
2273         symlink = (struct smb2_symlink_err_rsp *)err_buf->ErrorData;
2274         sub_len = le16_to_cpu(symlink->SubstituteNameLength);
2275         sub_offset = le16_to_cpu(symlink->SubstituteNameOffset);
2276         print_len = le16_to_cpu(symlink->PrintNameLength);
2277         print_offset = le16_to_cpu(symlink->PrintNameOffset);
2278
2279         if (err_iov.iov_len < SMB2_SYMLINK_STRUCT_SIZE + sub_offset + sub_len) {
2280                 rc = -ENOENT;
2281                 goto querty_exit;
2282         }
2283
2284         if (err_iov.iov_len <
2285             SMB2_SYMLINK_STRUCT_SIZE + print_offset + print_len) {
2286                 rc = -ENOENT;
2287                 goto querty_exit;
2288         }
2289
2290         *target_path = cifs_strndup_from_utf16(
2291                                 (char *)symlink->PathBuffer + sub_offset,
2292                                 sub_len, true, cifs_sb->local_nls);
2293         if (!(*target_path)) {
2294                 rc = -ENOMEM;
2295                 goto querty_exit;
2296         }
2297         convert_delimiter(*target_path, '/');
2298         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
2299
2300  querty_exit:
2301         free_rsp_buf(resp_buftype, err_buf);
2302  free_path:
2303         kfree(utf16_path);
2304         return rc;
2305 }
2306
2307 #ifdef CONFIG_CIFS_ACL
2308 static struct cifs_ntsd *
2309 get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb,
2310                 const struct cifs_fid *cifsfid, u32 *pacllen)
2311 {
2312         struct cifs_ntsd *pntsd = NULL;
2313         unsigned int xid;
2314         int rc = -EOPNOTSUPP;
2315         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
2316
2317         if (IS_ERR(tlink))
2318                 return ERR_CAST(tlink);
2319
2320         xid = get_xid();
2321         cifs_dbg(FYI, "trying to get acl\n");
2322
2323         rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid,
2324                             cifsfid->volatile_fid, (void **)&pntsd, pacllen);
2325         free_xid(xid);
2326
2327         cifs_put_tlink(tlink);
2328
2329         cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
2330         if (rc)
2331                 return ERR_PTR(rc);
2332         return pntsd;
2333
2334 }
2335
2336 static struct cifs_ntsd *
2337 get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb,
2338                 const char *path, u32 *pacllen)
2339 {
2340         struct cifs_ntsd *pntsd = NULL;
2341         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2342         unsigned int xid;
2343         int rc;
2344         struct cifs_tcon *tcon;
2345         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
2346         struct cifs_fid fid;
2347         struct cifs_open_parms oparms;
2348         __le16 *utf16_path;
2349
2350         cifs_dbg(FYI, "get smb3 acl for path %s\n", path);
2351         if (IS_ERR(tlink))
2352                 return ERR_CAST(tlink);
2353
2354         tcon = tlink_tcon(tlink);
2355         xid = get_xid();
2356
2357         if (backup_cred(cifs_sb))
2358                 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
2359         else
2360                 oparms.create_options = 0;
2361
2362         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2363         if (!utf16_path) {
2364                 rc = -ENOMEM;
2365                 free_xid(xid);
2366                 return ERR_PTR(rc);
2367         }
2368
2369         oparms.tcon = tcon;
2370         oparms.desired_access = READ_CONTROL;
2371         oparms.disposition = FILE_OPEN;
2372         oparms.fid = &fid;
2373         oparms.reconnect = false;
2374
2375         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
2376         kfree(utf16_path);
2377         if (!rc) {
2378                 rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
2379                             fid.volatile_fid, (void **)&pntsd, pacllen);
2380                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2381         }
2382
2383         cifs_put_tlink(tlink);
2384         free_xid(xid);
2385
2386         cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
2387         if (rc)
2388                 return ERR_PTR(rc);
2389         return pntsd;
2390 }
2391
2392 #ifdef CONFIG_CIFS_ACL
2393 static int
2394 set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen,
2395                 struct inode *inode, const char *path, int aclflag)
2396 {
2397         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2398         unsigned int xid;
2399         int rc, access_flags = 0;
2400         struct cifs_tcon *tcon;
2401         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2402         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
2403         struct cifs_fid fid;
2404         struct cifs_open_parms oparms;
2405         __le16 *utf16_path;
2406
2407         cifs_dbg(FYI, "set smb3 acl for path %s\n", path);
2408         if (IS_ERR(tlink))
2409                 return PTR_ERR(tlink);
2410
2411         tcon = tlink_tcon(tlink);
2412         xid = get_xid();
2413
2414         if (backup_cred(cifs_sb))
2415                 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
2416         else
2417                 oparms.create_options = 0;
2418
2419         if (aclflag == CIFS_ACL_OWNER || aclflag == CIFS_ACL_GROUP)
2420                 access_flags = WRITE_OWNER;
2421         else
2422                 access_flags = WRITE_DAC;
2423
2424         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2425         if (!utf16_path) {
2426                 rc = -ENOMEM;
2427                 free_xid(xid);
2428                 return rc;
2429         }
2430
2431         oparms.tcon = tcon;
2432         oparms.desired_access = access_flags;
2433         oparms.disposition = FILE_OPEN;
2434         oparms.path = path;
2435         oparms.fid = &fid;
2436         oparms.reconnect = false;
2437
2438         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
2439         kfree(utf16_path);
2440         if (!rc) {
2441                 rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
2442                             fid.volatile_fid, pnntsd, acllen, aclflag);
2443                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2444         }
2445
2446         cifs_put_tlink(tlink);
2447         free_xid(xid);
2448         return rc;
2449 }
2450 #endif /* CIFS_ACL */
2451
2452 /* Retrieve an ACL from the server */
2453 static struct cifs_ntsd *
2454 get_smb2_acl(struct cifs_sb_info *cifs_sb,
2455                                       struct inode *inode, const char *path,
2456                                       u32 *pacllen)
2457 {
2458         struct cifs_ntsd *pntsd = NULL;
2459         struct cifsFileInfo *open_file = NULL;
2460
2461         if (inode)
2462                 open_file = find_readable_file(CIFS_I(inode), true);
2463         if (!open_file)
2464                 return get_smb2_acl_by_path(cifs_sb, path, pacllen);
2465
2466         pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen);
2467         cifsFileInfo_put(open_file);
2468         return pntsd;
2469 }
2470 #endif
2471
2472 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
2473                             loff_t offset, loff_t len, bool keep_size)
2474 {
2475         struct inode *inode;
2476         struct cifsInodeInfo *cifsi;
2477         struct cifsFileInfo *cfile = file->private_data;
2478         struct file_zero_data_information fsctl_buf;
2479         long rc;
2480         unsigned int xid;
2481
2482         xid = get_xid();
2483
2484         inode = d_inode(cfile->dentry);
2485         cifsi = CIFS_I(inode);
2486
2487         /* if file not oplocked can't be sure whether asking to extend size */
2488         if (!CIFS_CACHE_READ(cifsi))
2489                 if (keep_size == false) {
2490                         rc = -EOPNOTSUPP;
2491                         free_xid(xid);
2492                         return rc;
2493                 }
2494
2495         /*
2496          * Must check if file sparse since fallocate -z (zero range) assumes
2497          * non-sparse allocation
2498          */
2499         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) {
2500                 rc = -EOPNOTSUPP;
2501                 free_xid(xid);
2502                 return rc;
2503         }
2504
2505         /*
2506          * need to make sure we are not asked to extend the file since the SMB3
2507          * fsctl does not change the file size. In the future we could change
2508          * this to zero the first part of the range then set the file size
2509          * which for a non sparse file would zero the newly extended range
2510          */
2511         if (keep_size == false)
2512                 if (i_size_read(inode) < offset + len) {
2513                         rc = -EOPNOTSUPP;
2514                         free_xid(xid);
2515                         return rc;
2516                 }
2517
2518         cifs_dbg(FYI, "offset %lld len %lld", offset, len);
2519
2520         fsctl_buf.FileOffset = cpu_to_le64(offset);
2521         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
2522
2523         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2524                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
2525                         true /* is_fctl */, (char *)&fsctl_buf,
2526                         sizeof(struct file_zero_data_information), NULL, NULL);
2527         free_xid(xid);
2528         return rc;
2529 }
2530
2531 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
2532                             loff_t offset, loff_t len)
2533 {
2534         struct inode *inode;
2535         struct cifsInodeInfo *cifsi;
2536         struct cifsFileInfo *cfile = file->private_data;
2537         struct file_zero_data_information fsctl_buf;
2538         long rc;
2539         unsigned int xid;
2540         __u8 set_sparse = 1;
2541
2542         xid = get_xid();
2543
2544         inode = d_inode(cfile->dentry);
2545         cifsi = CIFS_I(inode);
2546
2547         /* Need to make file sparse, if not already, before freeing range. */
2548         /* Consider adding equivalent for compressed since it could also work */
2549         if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse)) {
2550                 rc = -EOPNOTSUPP;
2551                 free_xid(xid);
2552                 return rc;
2553         }
2554
2555         cifs_dbg(FYI, "offset %lld len %lld", offset, len);
2556
2557         fsctl_buf.FileOffset = cpu_to_le64(offset);
2558         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
2559
2560         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2561                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
2562                         true /* is_fctl */, (char *)&fsctl_buf,
2563                         sizeof(struct file_zero_data_information), NULL, NULL);
2564         free_xid(xid);
2565         return rc;
2566 }
2567
2568 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
2569                             loff_t off, loff_t len, bool keep_size)
2570 {
2571         struct inode *inode;
2572         struct cifsInodeInfo *cifsi;
2573         struct cifsFileInfo *cfile = file->private_data;
2574         long rc = -EOPNOTSUPP;
2575         unsigned int xid;
2576
2577         xid = get_xid();
2578
2579         inode = d_inode(cfile->dentry);
2580         cifsi = CIFS_I(inode);
2581
2582         /* if file not oplocked can't be sure whether asking to extend size */
2583         if (!CIFS_CACHE_READ(cifsi))
2584                 if (keep_size == false) {
2585                         free_xid(xid);
2586                         return rc;
2587                 }
2588
2589         /*
2590          * Files are non-sparse by default so falloc may be a no-op
2591          * Must check if file sparse. If not sparse, and not extending
2592          * then no need to do anything since file already allocated
2593          */
2594         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
2595                 if (keep_size == true)
2596                         rc = 0;
2597                 /* check if extending file */
2598                 else if (i_size_read(inode) >= off + len)
2599                         /* not extending file and already not sparse */
2600                         rc = 0;
2601                 /* BB: in future add else clause to extend file */
2602                 else
2603                         rc = -EOPNOTSUPP;
2604                 free_xid(xid);
2605                 return rc;
2606         }
2607
2608         if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
2609                 /*
2610                  * Check if falloc starts within first few pages of file
2611                  * and ends within a few pages of the end of file to
2612                  * ensure that most of file is being forced to be
2613                  * fallocated now. If so then setting whole file sparse
2614                  * ie potentially making a few extra pages at the beginning
2615                  * or end of the file non-sparse via set_sparse is harmless.
2616                  */
2617                 if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) {
2618                         rc = -EOPNOTSUPP;
2619                         free_xid(xid);
2620                         return rc;
2621                 }
2622
2623                 rc = smb2_set_sparse(xid, tcon, cfile, inode, false);
2624         }
2625         /* BB: else ... in future add code to extend file and set sparse */
2626
2627
2628         free_xid(xid);
2629         return rc;
2630 }
2631
2632
2633 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
2634                            loff_t off, loff_t len)
2635 {
2636         /* KEEP_SIZE already checked for by do_fallocate */
2637         if (mode & FALLOC_FL_PUNCH_HOLE)
2638                 return smb3_punch_hole(file, tcon, off, len);
2639         else if (mode & FALLOC_FL_ZERO_RANGE) {
2640                 if (mode & FALLOC_FL_KEEP_SIZE)
2641                         return smb3_zero_range(file, tcon, off, len, true);
2642                 return smb3_zero_range(file, tcon, off, len, false);
2643         } else if (mode == FALLOC_FL_KEEP_SIZE)
2644                 return smb3_simple_falloc(file, tcon, off, len, true);
2645         else if (mode == 0)
2646                 return smb3_simple_falloc(file, tcon, off, len, false);
2647
2648         return -EOPNOTSUPP;
2649 }
2650
2651 static void
2652 smb2_downgrade_oplock(struct TCP_Server_Info *server,
2653                         struct cifsInodeInfo *cinode, bool set_level2)
2654 {
2655         if (set_level2)
2656                 server->ops->set_oplock_level(cinode, SMB2_OPLOCK_LEVEL_II,
2657                                                 0, NULL);
2658         else
2659                 server->ops->set_oplock_level(cinode, 0, 0, NULL);
2660 }
2661
2662 static void
2663 smb21_downgrade_oplock(struct TCP_Server_Info *server,
2664                        struct cifsInodeInfo *cinode, bool set_level2)
2665 {
2666         server->ops->set_oplock_level(cinode,
2667                                       set_level2 ? SMB2_LEASE_READ_CACHING_HE :
2668                                       0, 0, NULL);
2669 }
2670
2671 static void
2672 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
2673                       unsigned int epoch, bool *purge_cache)
2674 {
2675         oplock &= 0xFF;
2676         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
2677                 return;
2678         if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
2679                 cinode->oplock = CIFS_CACHE_RHW_FLG;
2680                 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
2681                          &cinode->vfs_inode);
2682         } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
2683                 cinode->oplock = CIFS_CACHE_RW_FLG;
2684                 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
2685                          &cinode->vfs_inode);
2686         } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
2687                 cinode->oplock = CIFS_CACHE_READ_FLG;
2688                 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
2689                          &cinode->vfs_inode);
2690         } else
2691                 cinode->oplock = 0;
2692 }
2693
2694 static void
2695 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
2696                        unsigned int epoch, bool *purge_cache)
2697 {
2698         char message[5] = {0};
2699
2700         oplock &= 0xFF;
2701         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
2702                 return;
2703
2704         cinode->oplock = 0;
2705         if (oplock & SMB2_LEASE_READ_CACHING_HE) {
2706                 cinode->oplock |= CIFS_CACHE_READ_FLG;
2707                 strcat(message, "R");
2708         }
2709         if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
2710                 cinode->oplock |= CIFS_CACHE_HANDLE_FLG;
2711                 strcat(message, "H");
2712         }
2713         if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
2714                 cinode->oplock |= CIFS_CACHE_WRITE_FLG;
2715                 strcat(message, "W");
2716         }
2717         if (!cinode->oplock)
2718                 strcat(message, "None");
2719         cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
2720                  &cinode->vfs_inode);
2721 }
2722
2723 static void
2724 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
2725                       unsigned int epoch, bool *purge_cache)
2726 {
2727         unsigned int old_oplock = cinode->oplock;
2728
2729         smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
2730
2731         if (purge_cache) {
2732                 *purge_cache = false;
2733                 if (old_oplock == CIFS_CACHE_READ_FLG) {
2734                         if (cinode->oplock == CIFS_CACHE_READ_FLG &&
2735                             (epoch - cinode->epoch > 0))
2736                                 *purge_cache = true;
2737                         else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
2738                                  (epoch - cinode->epoch > 1))
2739                                 *purge_cache = true;
2740                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
2741                                  (epoch - cinode->epoch > 1))
2742                                 *purge_cache = true;
2743                         else if (cinode->oplock == 0 &&
2744                                  (epoch - cinode->epoch > 0))
2745                                 *purge_cache = true;
2746                 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
2747                         if (cinode->oplock == CIFS_CACHE_RH_FLG &&
2748                             (epoch - cinode->epoch > 0))
2749                                 *purge_cache = true;
2750                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
2751                                  (epoch - cinode->epoch > 1))
2752                                 *purge_cache = true;
2753                 }
2754                 cinode->epoch = epoch;
2755         }
2756 }
2757
2758 static bool
2759 smb2_is_read_op(__u32 oplock)
2760 {
2761         return oplock == SMB2_OPLOCK_LEVEL_II;
2762 }
2763
2764 static bool
2765 smb21_is_read_op(__u32 oplock)
2766 {
2767         return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
2768                !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
2769 }
2770
2771 static __le32
2772 map_oplock_to_lease(u8 oplock)
2773 {
2774         if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
2775                 return SMB2_LEASE_WRITE_CACHING | SMB2_LEASE_READ_CACHING;
2776         else if (oplock == SMB2_OPLOCK_LEVEL_II)
2777                 return SMB2_LEASE_READ_CACHING;
2778         else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
2779                 return SMB2_LEASE_HANDLE_CACHING | SMB2_LEASE_READ_CACHING |
2780                        SMB2_LEASE_WRITE_CACHING;
2781         return 0;
2782 }
2783
2784 static char *
2785 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
2786 {
2787         struct create_lease *buf;
2788
2789         buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
2790         if (!buf)
2791                 return NULL;
2792
2793         memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
2794         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
2795
2796         buf->ccontext.DataOffset = cpu_to_le16(offsetof
2797                                         (struct create_lease, lcontext));
2798         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
2799         buf->ccontext.NameOffset = cpu_to_le16(offsetof
2800                                 (struct create_lease, Name));
2801         buf->ccontext.NameLength = cpu_to_le16(4);
2802         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
2803         buf->Name[0] = 'R';
2804         buf->Name[1] = 'q';
2805         buf->Name[2] = 'L';
2806         buf->Name[3] = 's';
2807         return (char *)buf;
2808 }
2809
2810 static char *
2811 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
2812 {
2813         struct create_lease_v2 *buf;
2814
2815         buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
2816         if (!buf)
2817                 return NULL;
2818
2819         memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
2820         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
2821
2822         buf->ccontext.DataOffset = cpu_to_le16(offsetof
2823                                         (struct create_lease_v2, lcontext));
2824         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
2825         buf->ccontext.NameOffset = cpu_to_le16(offsetof
2826                                 (struct create_lease_v2, Name));
2827         buf->ccontext.NameLength = cpu_to_le16(4);
2828         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
2829         buf->Name[0] = 'R';
2830         buf->Name[1] = 'q';
2831         buf->Name[2] = 'L';
2832         buf->Name[3] = 's';
2833         return (char *)buf;
2834 }
2835
2836 static __u8
2837 smb2_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
2838 {
2839         struct create_lease *lc = (struct create_lease *)buf;
2840
2841         *epoch = 0; /* not used */
2842         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
2843                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
2844         return le32_to_cpu(lc->lcontext.LeaseState);
2845 }
2846
2847 static __u8
2848 smb3_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
2849 {
2850         struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
2851
2852         *epoch = le16_to_cpu(lc->lcontext.Epoch);
2853         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
2854                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
2855         if (lease_key)
2856                 memcpy(lease_key, &lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE);
2857         return le32_to_cpu(lc->lcontext.LeaseState);
2858 }
2859
2860 static unsigned int
2861 smb2_wp_retry_size(struct inode *inode)
2862 {
2863         return min_t(unsigned int, CIFS_SB(inode->i_sb)->wsize,
2864                      SMB2_MAX_BUFFER_SIZE);
2865 }
2866
2867 static bool
2868 smb2_dir_needs_close(struct cifsFileInfo *cfile)
2869 {
2870         return !cfile->invalidHandle;
2871 }
2872
2873 static void
2874 fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len,
2875                    struct smb_rqst *old_rq)
2876 {
2877         struct smb2_sync_hdr *shdr =
2878                         (struct smb2_sync_hdr *)old_rq->rq_iov[0].iov_base;
2879
2880         memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr));
2881         tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
2882         tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
2883         tr_hdr->Flags = cpu_to_le16(0x01);
2884         get_random_bytes(&tr_hdr->Nonce, SMB3_AES128CMM_NONCE);
2885         memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8);
2886 }
2887
2888 /* We can not use the normal sg_set_buf() as we will sometimes pass a
2889  * stack object as buf.
2890  */
2891 static inline void smb2_sg_set_buf(struct scatterlist *sg, const void *buf,
2892                                    unsigned int buflen)
2893 {
2894         sg_set_page(sg, virt_to_page(buf), buflen, offset_in_page(buf));
2895 }
2896
2897 /* Assumes the first rqst has a transform header as the first iov.
2898  * I.e.
2899  * rqst[0].rq_iov[0]  is transform header
2900  * rqst[0].rq_iov[1+] data to be encrypted/decrypted
2901  * rqst[1+].rq_iov[0+] data to be encrypted/decrypted
2902  */
2903 static struct scatterlist *
2904 init_sg(int num_rqst, struct smb_rqst *rqst, u8 *sign)
2905 {
2906         unsigned int sg_len;
2907         struct scatterlist *sg;
2908         unsigned int i;
2909         unsigned int j;
2910         unsigned int idx = 0;
2911         int skip;
2912
2913         sg_len = 1;
2914         for (i = 0; i < num_rqst; i++)
2915                 sg_len += rqst[i].rq_nvec + rqst[i].rq_npages;
2916
2917         sg = kmalloc_array(sg_len, sizeof(struct scatterlist), GFP_KERNEL);
2918         if (!sg)
2919                 return NULL;
2920
2921         sg_init_table(sg, sg_len);
2922         for (i = 0; i < num_rqst; i++) {
2923                 for (j = 0; j < rqst[i].rq_nvec; j++) {
2924                         /*
2925                          * The first rqst has a transform header where the
2926                          * first 20 bytes are not part of the encrypted blob
2927                          */
2928                         skip = (i == 0) && (j == 0) ? 20 : 0;
2929                         smb2_sg_set_buf(&sg[idx++],
2930                                         rqst[i].rq_iov[j].iov_base + skip,
2931                                         rqst[i].rq_iov[j].iov_len - skip);
2932                         }
2933
2934                 for (j = 0; j < rqst[i].rq_npages; j++) {
2935                         unsigned int len, offset;
2936
2937                         rqst_page_get_length(&rqst[i], j, &len, &offset);
2938                         sg_set_page(&sg[idx++], rqst[i].rq_pages[j], len, offset);
2939                 }
2940         }
2941         smb2_sg_set_buf(&sg[idx], sign, SMB2_SIGNATURE_SIZE);
2942         return sg;
2943 }
2944
2945 static int
2946 smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key)
2947 {
2948         struct cifs_ses *ses;
2949         u8 *ses_enc_key;
2950
2951         spin_lock(&cifs_tcp_ses_lock);
2952         list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
2953                 if (ses->Suid != ses_id)
2954                         continue;
2955                 ses_enc_key = enc ? ses->smb3encryptionkey :
2956                                                         ses->smb3decryptionkey;
2957                 memcpy(key, ses_enc_key, SMB3_SIGN_KEY_SIZE);
2958                 spin_unlock(&cifs_tcp_ses_lock);
2959                 return 0;
2960         }
2961         spin_unlock(&cifs_tcp_ses_lock);
2962
2963         return 1;
2964 }
2965 /*
2966  * Encrypt or decrypt @rqst message. @rqst[0] has the following format:
2967  * iov[0]   - transform header (associate data),
2968  * iov[1-N] - SMB2 header and pages - data to encrypt.
2969  * On success return encrypted data in iov[1-N] and pages, leave iov[0]
2970  * untouched.
2971  */
2972 static int
2973 crypt_message(struct TCP_Server_Info *server, int num_rqst,
2974               struct smb_rqst *rqst, int enc)
2975 {
2976         struct smb2_transform_hdr *tr_hdr =
2977                 (struct smb2_transform_hdr *)rqst[0].rq_iov[0].iov_base;
2978         unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20;
2979         int rc = 0;
2980         struct scatterlist *sg;
2981         u8 sign[SMB2_SIGNATURE_SIZE] = {};
2982         u8 key[SMB3_SIGN_KEY_SIZE];
2983         struct aead_request *req;
2984         char *iv;
2985         unsigned int iv_len;
2986         DECLARE_CRYPTO_WAIT(wait);
2987         struct crypto_aead *tfm;
2988         unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
2989
2990         rc = smb2_get_enc_key(server, tr_hdr->SessionId, enc, key);
2991         if (rc) {
2992                 cifs_dbg(VFS, "%s: Could not get %scryption key\n", __func__,
2993                          enc ? "en" : "de");
2994                 return 0;
2995         }
2996
2997         rc = smb3_crypto_aead_allocate(server);
2998         if (rc) {
2999                 cifs_dbg(VFS, "%s: crypto alloc failed\n", __func__);
3000                 return rc;
3001         }
3002
3003         tfm = enc ? server->secmech.ccmaesencrypt :
3004                                                 server->secmech.ccmaesdecrypt;
3005         rc = crypto_aead_setkey(tfm, key, SMB3_SIGN_KEY_SIZE);
3006         if (rc) {
3007                 cifs_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc);
3008                 return rc;
3009         }
3010
3011         rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE);
3012         if (rc) {
3013                 cifs_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc);
3014                 return rc;
3015         }
3016
3017         req = aead_request_alloc(tfm, GFP_KERNEL);
3018         if (!req) {
3019                 cifs_dbg(VFS, "%s: Failed to alloc aead request", __func__);
3020                 return -ENOMEM;
3021         }
3022
3023         if (!enc) {
3024                 memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE);
3025                 crypt_len += SMB2_SIGNATURE_SIZE;
3026         }
3027
3028         sg = init_sg(num_rqst, rqst, sign);
3029         if (!sg) {
3030                 cifs_dbg(VFS, "%s: Failed to init sg", __func__);
3031                 rc = -ENOMEM;
3032                 goto free_req;
3033         }
3034
3035         iv_len = crypto_aead_ivsize(tfm);
3036         iv = kzalloc(iv_len, GFP_KERNEL);
3037         if (!iv) {
3038                 cifs_dbg(VFS, "%s: Failed to alloc IV", __func__);
3039                 rc = -ENOMEM;
3040                 goto free_sg;
3041         }
3042         iv[0] = 3;
3043         memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES128CMM_NONCE);
3044
3045         aead_request_set_crypt(req, sg, sg, crypt_len, iv);
3046         aead_request_set_ad(req, assoc_data_len);
3047
3048         aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
3049                                   crypto_req_done, &wait);
3050
3051         rc = crypto_wait_req(enc ? crypto_aead_encrypt(req)
3052                                 : crypto_aead_decrypt(req), &wait);
3053
3054         if (!rc && enc)
3055                 memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE);
3056
3057         kfree(iv);
3058 free_sg:
3059         kfree(sg);
3060 free_req:
3061         kfree(req);
3062         return rc;
3063 }
3064
3065 void
3066 smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst)
3067 {
3068         int i, j;
3069
3070         for (i = 0; i < num_rqst; i++) {
3071                 if (rqst[i].rq_pages) {
3072                         for (j = rqst[i].rq_npages - 1; j >= 0; j--)
3073                                 put_page(rqst[i].rq_pages[j]);
3074                         kfree(rqst[i].rq_pages);
3075                 }
3076         }
3077 }
3078
3079 /*
3080  * This function will initialize new_rq and encrypt the content.
3081  * The first entry, new_rq[0], only contains a single iov which contains
3082  * a smb2_transform_hdr and is pre-allocated by the caller.
3083  * This function then populates new_rq[1+] with the content from olq_rq[0+].
3084  *
3085  * The end result is an array of smb_rqst structures where the first structure
3086  * only contains a single iov for the transform header which we then can pass
3087  * to crypt_message().
3088  *
3089  * new_rq[0].rq_iov[0] :  smb2_transform_hdr pre-allocated by the caller
3090  * new_rq[1+].rq_iov[*] == old_rq[0+].rq_iov[*] : SMB2/3 requests
3091  */
3092 static int
3093 smb3_init_transform_rq(struct TCP_Server_Info *server, int num_rqst,
3094                        struct smb_rqst *new_rq, struct smb_rqst *old_rq)
3095 {
3096         struct page **pages;
3097         struct smb2_transform_hdr *tr_hdr = new_rq[0].rq_iov[0].iov_base;
3098         unsigned int npages;
3099         unsigned int orig_len = 0;
3100         int i, j;
3101         int rc = -ENOMEM;
3102
3103         for (i = 1; i < num_rqst; i++) {
3104                 npages = old_rq[i - 1].rq_npages;
3105                 pages = kmalloc_array(npages, sizeof(struct page *),
3106                                       GFP_KERNEL);
3107                 if (!pages)
3108                         goto err_free;
3109
3110                 new_rq[i].rq_pages = pages;
3111                 new_rq[i].rq_npages = npages;
3112                 new_rq[i].rq_offset = old_rq[i - 1].rq_offset;
3113                 new_rq[i].rq_pagesz = old_rq[i - 1].rq_pagesz;
3114                 new_rq[i].rq_tailsz = old_rq[i - 1].rq_tailsz;
3115                 new_rq[i].rq_iov = old_rq[i - 1].rq_iov;
3116                 new_rq[i].rq_nvec = old_rq[i - 1].rq_nvec;
3117
3118                 orig_len += smb_rqst_len(server, &old_rq[i - 1]);
3119
3120                 for (j = 0; j < npages; j++) {
3121                         pages[j] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
3122                         if (!pages[j])
3123                                 goto err_free;
3124                 }
3125
3126                 /* copy pages form the old */
3127                 for (j = 0; j < npages; j++) {
3128                         char *dst, *src;
3129                         unsigned int offset, len;
3130
3131                         rqst_page_get_length(&new_rq[i], j, &len, &offset);
3132
3133                         dst = (char *) kmap(new_rq[i].rq_pages[j]) + offset;
3134                         src = (char *) kmap(old_rq[i - 1].rq_pages[j]) + offset;
3135
3136                         memcpy(dst, src, len);
3137                         kunmap(new_rq[i].rq_pages[j]);
3138                         kunmap(old_rq[i - 1].rq_pages[j]);
3139                 }
3140         }
3141
3142         /* fill the 1st iov with a transform header */
3143         fill_transform_hdr(tr_hdr, orig_len, old_rq);
3144
3145         rc = crypt_message(server, num_rqst, new_rq, 1);
3146         cifs_dbg(FYI, "encrypt message returned %d", rc);
3147         if (rc)
3148                 goto err_free;
3149
3150         return rc;
3151
3152 err_free:
3153         smb3_free_compound_rqst(num_rqst - 1, &new_rq[1]);
3154         return rc;
3155 }
3156
3157 static int
3158 smb3_is_transform_hdr(void *buf)
3159 {
3160         struct smb2_transform_hdr *trhdr = buf;
3161
3162         return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
3163 }
3164
3165 static int
3166 decrypt_raw_data(struct TCP_Server_Info *server, char *buf,
3167                  unsigned int buf_data_size, struct page **pages,
3168                  unsigned int npages, unsigned int page_data_size)
3169 {
3170         struct kvec iov[2];
3171         struct smb_rqst rqst = {NULL};
3172         int rc;
3173
3174         iov[0].iov_base = buf;
3175         iov[0].iov_len = sizeof(struct smb2_transform_hdr);
3176         iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr);
3177         iov[1].iov_len = buf_data_size;
3178
3179         rqst.rq_iov = iov;
3180         rqst.rq_nvec = 2;
3181         rqst.rq_pages = pages;
3182         rqst.rq_npages = npages;
3183         rqst.rq_pagesz = PAGE_SIZE;
3184         rqst.rq_tailsz = (page_data_size % PAGE_SIZE) ? : PAGE_SIZE;
3185
3186         rc = crypt_message(server, 1, &rqst, 0);
3187         cifs_dbg(FYI, "decrypt message returned %d\n", rc);
3188
3189         if (rc)
3190                 return rc;
3191
3192         memmove(buf, iov[1].iov_base, buf_data_size);
3193
3194         server->total_read = buf_data_size + page_data_size;
3195
3196         return rc;
3197 }
3198
3199 static int
3200 read_data_into_pages(struct TCP_Server_Info *server, struct page **pages,
3201                      unsigned int npages, unsigned int len)
3202 {
3203         int i;
3204         int length;
3205
3206         for (i = 0; i < npages; i++) {
3207                 struct page *page = pages[i];
3208                 size_t n;
3209
3210                 n = len;
3211                 if (len >= PAGE_SIZE) {
3212                         /* enough data to fill the page */
3213                         n = PAGE_SIZE;
3214                         len -= n;
3215                 } else {
3216                         zero_user(page, len, PAGE_SIZE - len);
3217                         len = 0;
3218                 }
3219                 length = cifs_read_page_from_socket(server, page, 0, n);
3220                 if (length < 0)
3221                         return length;
3222                 server->total_read += length;
3223         }
3224
3225         return 0;
3226 }
3227
3228 static int
3229 init_read_bvec(struct page **pages, unsigned int npages, unsigned int data_size,
3230                unsigned int cur_off, struct bio_vec **page_vec)
3231 {
3232         struct bio_vec *bvec;
3233         int i;
3234
3235         bvec = kcalloc(npages, sizeof(struct bio_vec), GFP_KERNEL);
3236         if (!bvec)
3237                 return -ENOMEM;
3238
3239         for (i = 0; i < npages; i++) {
3240                 bvec[i].bv_page = pages[i];
3241                 bvec[i].bv_offset = (i == 0) ? cur_off : 0;
3242                 bvec[i].bv_len = min_t(unsigned int, PAGE_SIZE, data_size);
3243                 data_size -= bvec[i].bv_len;
3244         }
3245
3246         if (data_size != 0) {
3247                 cifs_dbg(VFS, "%s: something went wrong\n", __func__);
3248                 kfree(bvec);
3249                 return -EIO;
3250         }
3251
3252         *page_vec = bvec;
3253         return 0;
3254 }
3255
3256 static int
3257 handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid,
3258                  char *buf, unsigned int buf_len, struct page **pages,
3259                  unsigned int npages, unsigned int page_data_size)
3260 {
3261         unsigned int data_offset;
3262         unsigned int data_len;
3263         unsigned int cur_off;
3264         unsigned int cur_page_idx;
3265         unsigned int pad_len;
3266         struct cifs_readdata *rdata = mid->callback_data;
3267         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
3268         struct bio_vec *bvec = NULL;
3269         struct iov_iter iter;
3270         struct kvec iov;
3271         int length;
3272         bool use_rdma_mr = false;
3273
3274         if (shdr->Command != SMB2_READ) {
3275                 cifs_dbg(VFS, "only big read responses are supported\n");
3276                 return -ENOTSUPP;
3277         }
3278
3279         if (server->ops->is_session_expired &&
3280             server->ops->is_session_expired(buf)) {
3281                 cifs_reconnect(server);
3282                 wake_up(&server->response_q);
3283                 return -1;
3284         }
3285
3286         if (server->ops->is_status_pending &&
3287                         server->ops->is_status_pending(buf, server))
3288                 return -1;
3289
3290         /* set up first two iov to get credits */
3291         rdata->iov[0].iov_base = buf;
3292         rdata->iov[0].iov_len = 0;
3293         rdata->iov[1].iov_base = buf;
3294         rdata->iov[1].iov_len =
3295                 min_t(unsigned int, buf_len, server->vals->read_rsp_size);
3296         cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n",
3297                  rdata->iov[0].iov_base, rdata->iov[0].iov_len);
3298         cifs_dbg(FYI, "1: iov_base=%p iov_len=%zu\n",
3299                  rdata->iov[1].iov_base, rdata->iov[1].iov_len);
3300
3301         rdata->result = server->ops->map_error(buf, true);
3302         if (rdata->result != 0) {
3303                 cifs_dbg(FYI, "%s: server returned error %d\n",
3304                          __func__, rdata->result);
3305                 /* normal error on read response */
3306                 dequeue_mid(mid, false);
3307                 return 0;
3308         }
3309
3310         data_offset = server->ops->read_data_offset(buf);
3311 #ifdef CONFIG_CIFS_SMB_DIRECT
3312         use_rdma_mr = rdata->mr;
3313 #endif
3314         data_len = server->ops->read_data_length(buf, use_rdma_mr);
3315
3316         if (data_offset < server->vals->read_rsp_size) {
3317                 /*
3318                  * win2k8 sometimes sends an offset of 0 when the read
3319                  * is beyond the EOF. Treat it as if the data starts just after
3320                  * the header.
3321                  */
3322                 cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n",
3323                          __func__, data_offset);
3324                 data_offset = server->vals->read_rsp_size;
3325         } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) {
3326                 /* data_offset is beyond the end of smallbuf */
3327                 cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n",
3328                          __func__, data_offset);
3329                 rdata->result = -EIO;
3330                 dequeue_mid(mid, rdata->result);
3331                 return 0;
3332         }
3333
3334         pad_len = data_offset - server->vals->read_rsp_size;
3335
3336         if (buf_len <= data_offset) {
3337                 /* read response payload is in pages */
3338                 cur_page_idx = pad_len / PAGE_SIZE;
3339                 cur_off = pad_len % PAGE_SIZE;
3340
3341                 if (cur_page_idx != 0) {
3342                         /* data offset is beyond the 1st page of response */
3343                         cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n",
3344                                  __func__, data_offset);
3345                         rdata->result = -EIO;
3346                         dequeue_mid(mid, rdata->result);
3347                         return 0;
3348                 }
3349
3350                 if (data_len > page_data_size - pad_len) {
3351                         /* data_len is corrupt -- discard frame */
3352                         rdata->result = -EIO;
3353                         dequeue_mid(mid, rdata->result);
3354                         return 0;
3355                 }
3356
3357                 rdata->result = init_read_bvec(pages, npages, page_data_size,
3358                                                cur_off, &bvec);
3359                 if (rdata->result != 0) {
3360                         dequeue_mid(mid, rdata->result);
3361                         return 0;
3362                 }
3363
3364                 iov_iter_bvec(&iter, WRITE, bvec, npages, data_len);
3365         } else if (buf_len >= data_offset + data_len) {
3366                 /* read response payload is in buf */
3367                 WARN_ONCE(npages > 0, "read data can be either in buf or in pages");
3368                 iov.iov_base = buf + data_offset;
3369                 iov.iov_len = data_len;
3370                 iov_iter_kvec(&iter, WRITE, &iov, 1, data_len);
3371         } else {
3372                 /* read response payload cannot be in both buf and pages */
3373                 WARN_ONCE(1, "buf can not contain only a part of read data");
3374                 rdata->result = -EIO;
3375                 dequeue_mid(mid, rdata->result);
3376                 return 0;
3377         }
3378
3379         length = rdata->copy_into_pages(server, rdata, &iter);
3380
3381         kfree(bvec);
3382
3383         if (length < 0)
3384                 return length;
3385
3386         dequeue_mid(mid, false);
3387         return length;
3388 }
3389
3390 static int
3391 receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid)
3392 {
3393         char *buf = server->smallbuf;
3394         struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
3395         unsigned int npages;
3396         struct page **pages;
3397         unsigned int len;
3398         unsigned int buflen = server->pdu_size;
3399         int rc;
3400         int i = 0;
3401
3402         len = min_t(unsigned int, buflen, server->vals->read_rsp_size +
3403                 sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1;
3404
3405         rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len);
3406         if (rc < 0)
3407                 return rc;
3408         server->total_read += rc;
3409
3410         len = le32_to_cpu(tr_hdr->OriginalMessageSize) -
3411                 server->vals->read_rsp_size;
3412         npages = DIV_ROUND_UP(len, PAGE_SIZE);
3413
3414         pages = kmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
3415         if (!pages) {
3416                 rc = -ENOMEM;
3417                 goto discard_data;
3418         }
3419
3420         for (; i < npages; i++) {
3421                 pages[i] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
3422                 if (!pages[i]) {
3423                         rc = -ENOMEM;
3424                         goto discard_data;
3425                 }
3426         }
3427
3428         /* read read data into pages */
3429         rc = read_data_into_pages(server, pages, npages, len);
3430         if (rc)
3431                 goto free_pages;
3432
3433         rc = cifs_discard_remaining_data(server);
3434         if (rc)
3435                 goto free_pages;
3436
3437         rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size,
3438                               pages, npages, len);
3439         if (rc)
3440                 goto free_pages;
3441
3442         *mid = smb2_find_mid(server, buf);
3443         if (*mid == NULL)
3444                 cifs_dbg(FYI, "mid not found\n");
3445         else {
3446                 cifs_dbg(FYI, "mid found\n");
3447                 (*mid)->decrypted = true;
3448                 rc = handle_read_data(server, *mid, buf,
3449                                       server->vals->read_rsp_size,
3450                                       pages, npages, len);
3451         }
3452
3453 free_pages:
3454         for (i = i - 1; i >= 0; i--)
3455                 put_page(pages[i]);
3456         kfree(pages);
3457         return rc;
3458 discard_data:
3459         cifs_discard_remaining_data(server);
3460         goto free_pages;
3461 }
3462
3463 static int
3464 receive_encrypted_standard(struct TCP_Server_Info *server,
3465                            struct mid_q_entry **mids, char **bufs,
3466                            int *num_mids)
3467 {
3468         int ret, length;
3469         char *buf = server->smallbuf;
3470         char *tmpbuf;
3471         struct smb2_sync_hdr *shdr;
3472         unsigned int pdu_length = server->pdu_size;
3473         unsigned int buf_size;
3474         struct mid_q_entry *mid_entry;
3475         int next_is_large;
3476         char *next_buffer = NULL;
3477
3478         *num_mids = 0;
3479
3480         /* switch to large buffer if too big for a small one */
3481         if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE) {
3482                 server->large_buf = true;
3483                 memcpy(server->bigbuf, buf, server->total_read);
3484                 buf = server->bigbuf;
3485         }
3486
3487         /* now read the rest */
3488         length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
3489                                 pdu_length - HEADER_SIZE(server) + 1);
3490         if (length < 0)
3491                 return length;
3492         server->total_read += length;
3493
3494         buf_size = pdu_length - sizeof(struct smb2_transform_hdr);
3495         length = decrypt_raw_data(server, buf, buf_size, NULL, 0, 0);
3496         if (length)
3497                 return length;
3498
3499         next_is_large = server->large_buf;
3500  one_more:
3501         shdr = (struct smb2_sync_hdr *)buf;
3502         if (shdr->NextCommand) {
3503                 if (next_is_large) {
3504                         tmpbuf = server->bigbuf;
3505                         next_buffer = (char *)cifs_buf_get();
3506                 } else {
3507                         tmpbuf = server->smallbuf;
3508                         next_buffer = (char *)cifs_small_buf_get();
3509                 }
3510                 memcpy(next_buffer,
3511                        tmpbuf + le32_to_cpu(shdr->NextCommand),
3512                        pdu_length - le32_to_cpu(shdr->NextCommand));
3513         }
3514
3515         mid_entry = smb2_find_mid(server, buf);
3516         if (mid_entry == NULL)
3517                 cifs_dbg(FYI, "mid not found\n");
3518         else {
3519                 cifs_dbg(FYI, "mid found\n");
3520                 mid_entry->decrypted = true;
3521                 mid_entry->resp_buf_size = server->pdu_size;
3522         }
3523
3524         if (*num_mids >= MAX_COMPOUND) {
3525                 cifs_dbg(VFS, "too many PDUs in compound\n");
3526                 return -1;
3527         }
3528         bufs[*num_mids] = buf;
3529         mids[(*num_mids)++] = mid_entry;
3530
3531         if (mid_entry && mid_entry->handle)
3532                 ret = mid_entry->handle(server, mid_entry);
3533         else
3534                 ret = cifs_handle_standard(server, mid_entry);
3535
3536         if (ret == 0 && shdr->NextCommand) {
3537                 pdu_length -= le32_to_cpu(shdr->NextCommand);
3538                 server->large_buf = next_is_large;
3539                 if (next_is_large)
3540                         server->bigbuf = next_buffer;
3541                 else
3542                         server->smallbuf = next_buffer;
3543
3544                 buf += le32_to_cpu(shdr->NextCommand);
3545                 goto one_more;
3546         }
3547
3548         return ret;
3549 }
3550
3551 static int
3552 smb3_receive_transform(struct TCP_Server_Info *server,
3553                        struct mid_q_entry **mids, char **bufs, int *num_mids)
3554 {
3555         char *buf = server->smallbuf;
3556         unsigned int pdu_length = server->pdu_size;
3557         struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
3558         unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
3559
3560         if (pdu_length < sizeof(struct smb2_transform_hdr) +
3561                                                 sizeof(struct smb2_sync_hdr)) {
3562                 cifs_dbg(VFS, "Transform message is too small (%u)\n",
3563                          pdu_length);
3564                 cifs_reconnect(server);
3565                 wake_up(&server->response_q);
3566                 return -ECONNABORTED;
3567         }
3568
3569         if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) {
3570                 cifs_dbg(VFS, "Transform message is broken\n");
3571                 cifs_reconnect(server);
3572                 wake_up(&server->response_q);
3573                 return -ECONNABORTED;
3574         }
3575
3576         /* TODO: add support for compounds containing READ. */
3577         if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server)) {
3578                 *num_mids = 1;
3579                 return receive_encrypted_read(server, &mids[0]);
3580         }
3581
3582         return receive_encrypted_standard(server, mids, bufs, num_mids);
3583 }
3584
3585 int
3586 smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid)
3587 {
3588         char *buf = server->large_buf ? server->bigbuf : server->smallbuf;
3589
3590         return handle_read_data(server, mid, buf, server->pdu_size,
3591                                 NULL, 0, 0);
3592 }
3593
3594 static int
3595 smb2_next_header(char *buf)
3596 {
3597         struct smb2_sync_hdr *hdr = (struct smb2_sync_hdr *)buf;
3598         struct smb2_transform_hdr *t_hdr = (struct smb2_transform_hdr *)buf;
3599
3600         if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM)
3601                 return sizeof(struct smb2_transform_hdr) +
3602                   le32_to_cpu(t_hdr->OriginalMessageSize);
3603
3604         return le32_to_cpu(hdr->NextCommand);
3605 }
3606
3607 struct smb_version_operations smb20_operations = {
3608         .compare_fids = smb2_compare_fids,
3609         .setup_request = smb2_setup_request,
3610         .setup_async_request = smb2_setup_async_request,
3611         .check_receive = smb2_check_receive,
3612         .add_credits = smb2_add_credits,
3613         .set_credits = smb2_set_credits,
3614         .get_credits_field = smb2_get_credits_field,
3615         .get_credits = smb2_get_credits,
3616         .wait_mtu_credits = cifs_wait_mtu_credits,
3617         .get_next_mid = smb2_get_next_mid,
3618         .revert_current_mid = smb2_revert_current_mid,
3619         .read_data_offset = smb2_read_data_offset,
3620         .read_data_length = smb2_read_data_length,
3621         .map_error = map_smb2_to_linux_error,
3622         .find_mid = smb2_find_mid,
3623         .check_message = smb2_check_message,
3624         .dump_detail = smb2_dump_detail,
3625         .clear_stats = smb2_clear_stats,
3626         .print_stats = smb2_print_stats,
3627         .is_oplock_break = smb2_is_valid_oplock_break,
3628         .handle_cancelled_mid = smb2_handle_cancelled_mid,
3629         .downgrade_oplock = smb2_downgrade_oplock,
3630         .need_neg = smb2_need_neg,
3631         .negotiate = smb2_negotiate,
3632         .negotiate_wsize = smb2_negotiate_wsize,
3633         .negotiate_rsize = smb2_negotiate_rsize,
3634         .sess_setup = SMB2_sess_setup,
3635         .logoff = SMB2_logoff,
3636         .tree_connect = SMB2_tcon,
3637         .tree_disconnect = SMB2_tdis,
3638         .qfs_tcon = smb2_qfs_tcon,
3639         .is_path_accessible = smb2_is_path_accessible,
3640         .can_echo = smb2_can_echo,
3641         .echo = SMB2_echo,
3642         .query_path_info = smb2_query_path_info,
3643         .get_srv_inum = smb2_get_srv_inum,
3644         .query_file_info = smb2_query_file_info,
3645         .set_path_size = smb2_set_path_size,
3646         .set_file_size = smb2_set_file_size,
3647         .set_file_info = smb2_set_file_info,
3648         .set_compression = smb2_set_compression,
3649         .mkdir = smb2_mkdir,
3650         .mkdir_setinfo = smb2_mkdir_setinfo,
3651         .rmdir = smb2_rmdir,
3652         .unlink = smb2_unlink,
3653         .rename = smb2_rename_path,
3654         .create_hardlink = smb2_create_hardlink,
3655         .query_symlink = smb2_query_symlink,
3656         .query_mf_symlink = smb3_query_mf_symlink,
3657         .create_mf_symlink = smb3_create_mf_symlink,
3658         .open = smb2_open_file,
3659         .set_fid = smb2_set_fid,
3660         .close = smb2_close_file,
3661         .flush = smb2_flush_file,
3662         .async_readv = smb2_async_readv,
3663         .async_writev = smb2_async_writev,
3664         .sync_read = smb2_sync_read,
3665         .sync_write = smb2_sync_write,
3666         .query_dir_first = smb2_query_dir_first,
3667         .query_dir_next = smb2_query_dir_next,
3668         .close_dir = smb2_close_dir,
3669         .calc_smb_size = smb2_calc_size,
3670         .is_status_pending = smb2_is_status_pending,
3671         .is_session_expired = smb2_is_session_expired,
3672         .oplock_response = smb2_oplock_response,
3673         .queryfs = smb2_queryfs,
3674         .mand_lock = smb2_mand_lock,
3675         .mand_unlock_range = smb2_unlock_range,
3676         .push_mand_locks = smb2_push_mandatory_locks,
3677         .get_lease_key = smb2_get_lease_key,
3678         .set_lease_key = smb2_set_lease_key,
3679         .new_lease_key = smb2_new_lease_key,
3680         .calc_signature = smb2_calc_signature,
3681         .is_read_op = smb2_is_read_op,
3682         .set_oplock_level = smb2_set_oplock_level,
3683         .create_lease_buf = smb2_create_lease_buf,
3684         .parse_lease_buf = smb2_parse_lease_buf,
3685         .copychunk_range = smb2_copychunk_range,
3686         .wp_retry_size = smb2_wp_retry_size,
3687         .dir_needs_close = smb2_dir_needs_close,
3688         .get_dfs_refer = smb2_get_dfs_refer,
3689         .select_sectype = smb2_select_sectype,
3690 #ifdef CONFIG_CIFS_XATTR
3691         .query_all_EAs = smb2_query_eas,
3692         .set_EA = smb2_set_ea,
3693 #endif /* CIFS_XATTR */
3694 #ifdef CONFIG_CIFS_ACL
3695         .get_acl = get_smb2_acl,
3696         .get_acl_by_fid = get_smb2_acl_by_fid,
3697         .set_acl = set_smb2_acl,
3698 #endif /* CIFS_ACL */
3699         .next_header = smb2_next_header,
3700         .ioctl_query_info = smb2_ioctl_query_info,
3701 };
3702
3703 struct smb_version_operations smb21_operations = {
3704         .compare_fids = smb2_compare_fids,
3705         .setup_request = smb2_setup_request,
3706         .setup_async_request = smb2_setup_async_request,
3707         .check_receive = smb2_check_receive,
3708         .add_credits = smb2_add_credits,
3709         .set_credits = smb2_set_credits,
3710         .get_credits_field = smb2_get_credits_field,
3711         .get_credits = smb2_get_credits,
3712         .wait_mtu_credits = smb2_wait_mtu_credits,
3713         .adjust_credits = smb2_adjust_credits,
3714         .get_next_mid = smb2_get_next_mid,
3715         .revert_current_mid = smb2_revert_current_mid,
3716         .read_data_offset = smb2_read_data_offset,
3717         .read_data_length = smb2_read_data_length,
3718         .map_error = map_smb2_to_linux_error,
3719         .find_mid = smb2_find_mid,
3720         .check_message = smb2_check_message,
3721         .dump_detail = smb2_dump_detail,
3722         .clear_stats = smb2_clear_stats,
3723         .print_stats = smb2_print_stats,
3724         .is_oplock_break = smb2_is_valid_oplock_break,
3725         .handle_cancelled_mid = smb2_handle_cancelled_mid,
3726         .downgrade_oplock = smb21_downgrade_oplock,
3727         .need_neg = smb2_need_neg,
3728         .negotiate = smb2_negotiate,
3729         .negotiate_wsize = smb2_negotiate_wsize,
3730         .negotiate_rsize = smb2_negotiate_rsize,
3731         .sess_setup = SMB2_sess_setup,
3732         .logoff = SMB2_logoff,
3733         .tree_connect = SMB2_tcon,
3734         .tree_disconnect = SMB2_tdis,
3735         .qfs_tcon = smb2_qfs_tcon,
3736         .is_path_accessible = smb2_is_path_accessible,
3737         .can_echo = smb2_can_echo,
3738         .echo = SMB2_echo,
3739         .query_path_info = smb2_query_path_info,
3740         .get_srv_inum = smb2_get_srv_inum,
3741         .query_file_info = smb2_query_file_info,
3742         .set_path_size = smb2_set_path_size,
3743         .set_file_size = smb2_set_file_size,
3744         .set_file_info = smb2_set_file_info,
3745         .set_compression = smb2_set_compression,
3746         .mkdir = smb2_mkdir,
3747         .mkdir_setinfo = smb2_mkdir_setinfo,
3748         .rmdir = smb2_rmdir,
3749         .unlink = smb2_unlink,
3750         .rename = smb2_rename_path,
3751         .create_hardlink = smb2_create_hardlink,
3752         .query_symlink = smb2_query_symlink,
3753         .query_mf_symlink = smb3_query_mf_symlink,
3754         .create_mf_symlink = smb3_create_mf_symlink,
3755         .open = smb2_open_file,
3756         .set_fid = smb2_set_fid,
3757         .close = smb2_close_file,
3758         .flush = smb2_flush_file,
3759         .async_readv = smb2_async_readv,
3760         .async_writev = smb2_async_writev,
3761         .sync_read = smb2_sync_read,
3762         .sync_write = smb2_sync_write,
3763         .query_dir_first = smb2_query_dir_first,
3764         .query_dir_next = smb2_query_dir_next,
3765         .close_dir = smb2_close_dir,
3766         .calc_smb_size = smb2_calc_size,
3767         .is_status_pending = smb2_is_status_pending,
3768         .is_session_expired = smb2_is_session_expired,
3769         .oplock_response = smb2_oplock_response,
3770         .queryfs = smb2_queryfs,
3771         .mand_lock = smb2_mand_lock,
3772         .mand_unlock_range = smb2_unlock_range,
3773         .push_mand_locks = smb2_push_mandatory_locks,
3774         .get_lease_key = smb2_get_lease_key,
3775         .set_lease_key = smb2_set_lease_key,
3776         .new_lease_key = smb2_new_lease_key,
3777         .calc_signature = smb2_calc_signature,
3778         .is_read_op = smb21_is_read_op,
3779         .set_oplock_level = smb21_set_oplock_level,
3780         .create_lease_buf = smb2_create_lease_buf,
3781         .parse_lease_buf = smb2_parse_lease_buf,
3782         .copychunk_range = smb2_copychunk_range,
3783         .wp_retry_size = smb2_wp_retry_size,
3784         .dir_needs_close = smb2_dir_needs_close,
3785         .enum_snapshots = smb3_enum_snapshots,
3786         .get_dfs_refer = smb2_get_dfs_refer,
3787         .select_sectype = smb2_select_sectype,
3788 #ifdef CONFIG_CIFS_XATTR
3789         .query_all_EAs = smb2_query_eas,
3790         .set_EA = smb2_set_ea,
3791 #endif /* CIFS_XATTR */
3792 #ifdef CONFIG_CIFS_ACL
3793         .get_acl = get_smb2_acl,
3794         .get_acl_by_fid = get_smb2_acl_by_fid,
3795         .set_acl = set_smb2_acl,
3796 #endif /* CIFS_ACL */
3797         .next_header = smb2_next_header,
3798         .ioctl_query_info = smb2_ioctl_query_info,
3799 };
3800
3801 struct smb_version_operations smb30_operations = {
3802         .compare_fids = smb2_compare_fids,
3803         .setup_request = smb2_setup_request,
3804         .setup_async_request = smb2_setup_async_request,
3805         .check_receive = smb2_check_receive,
3806         .add_credits = smb2_add_credits,
3807         .set_credits = smb2_set_credits,
3808         .get_credits_field = smb2_get_credits_field,
3809         .get_credits = smb2_get_credits,
3810         .wait_mtu_credits = smb2_wait_mtu_credits,
3811         .adjust_credits = smb2_adjust_credits,
3812         .get_next_mid = smb2_get_next_mid,
3813         .revert_current_mid = smb2_revert_current_mid,
3814         .read_data_offset = smb2_read_data_offset,
3815         .read_data_length = smb2_read_data_length,
3816         .map_error = map_smb2_to_linux_error,
3817         .find_mid = smb2_find_mid,
3818         .check_message = smb2_check_message,
3819         .dump_detail = smb2_dump_detail,
3820         .clear_stats = smb2_clear_stats,
3821         .print_stats = smb2_print_stats,
3822         .dump_share_caps = smb2_dump_share_caps,
3823         .is_oplock_break = smb2_is_valid_oplock_break,
3824         .handle_cancelled_mid = smb2_handle_cancelled_mid,
3825         .downgrade_oplock = smb21_downgrade_oplock,
3826         .need_neg = smb2_need_neg,
3827         .negotiate = smb2_negotiate,
3828         .negotiate_wsize = smb3_negotiate_wsize,
3829         .negotiate_rsize = smb3_negotiate_rsize,
3830         .sess_setup = SMB2_sess_setup,
3831         .logoff = SMB2_logoff,
3832         .tree_connect = SMB2_tcon,
3833         .tree_disconnect = SMB2_tdis,
3834         .qfs_tcon = smb3_qfs_tcon,
3835         .is_path_accessible = smb2_is_path_accessible,
3836         .can_echo = smb2_can_echo,
3837         .echo = SMB2_echo,
3838         .query_path_info = smb2_query_path_info,
3839         .get_srv_inum = smb2_get_srv_inum,
3840         .query_file_info = smb2_query_file_info,
3841         .set_path_size = smb2_set_path_size,
3842         .set_file_size = smb2_set_file_size,
3843         .set_file_info = smb2_set_file_info,
3844         .set_compression = smb2_set_compression,
3845         .mkdir = smb2_mkdir,
3846         .mkdir_setinfo = smb2_mkdir_setinfo,
3847         .rmdir = smb2_rmdir,
3848         .unlink = smb2_unlink,
3849         .rename = smb2_rename_path,
3850         .create_hardlink = smb2_create_hardlink,
3851         .query_symlink = smb2_query_symlink,
3852         .query_mf_symlink = smb3_query_mf_symlink,
3853         .create_mf_symlink = smb3_create_mf_symlink,
3854         .open = smb2_open_file,
3855         .set_fid = smb2_set_fid,
3856         .close = smb2_close_file,
3857         .flush = smb2_flush_file,
3858         .async_readv = smb2_async_readv,
3859         .async_writev = smb2_async_writev,
3860         .sync_read = smb2_sync_read,
3861         .sync_write = smb2_sync_write,
3862         .query_dir_first = smb2_query_dir_first,
3863         .query_dir_next = smb2_query_dir_next,
3864         .close_dir = smb2_close_dir,
3865         .calc_smb_size = smb2_calc_size,
3866         .is_status_pending = smb2_is_status_pending,
3867         .is_session_expired = smb2_is_session_expired,
3868         .oplock_response = smb2_oplock_response,
3869         .queryfs = smb2_queryfs,
3870         .mand_lock = smb2_mand_lock,
3871         .mand_unlock_range = smb2_unlock_range,
3872         .push_mand_locks = smb2_push_mandatory_locks,
3873         .get_lease_key = smb2_get_lease_key,
3874         .set_lease_key = smb2_set_lease_key,
3875         .new_lease_key = smb2_new_lease_key,
3876         .generate_signingkey = generate_smb30signingkey,
3877         .calc_signature = smb3_calc_signature,
3878         .set_integrity  = smb3_set_integrity,
3879         .is_read_op = smb21_is_read_op,
3880         .set_oplock_level = smb3_set_oplock_level,
3881         .create_lease_buf = smb3_create_lease_buf,
3882         .parse_lease_buf = smb3_parse_lease_buf,
3883         .copychunk_range = smb2_copychunk_range,
3884         .duplicate_extents = smb2_duplicate_extents,
3885         .validate_negotiate = smb3_validate_negotiate,
3886         .wp_retry_size = smb2_wp_retry_size,
3887         .dir_needs_close = smb2_dir_needs_close,
3888         .fallocate = smb3_fallocate,
3889         .enum_snapshots = smb3_enum_snapshots,
3890         .init_transform_rq = smb3_init_transform_rq,
3891         .is_transform_hdr = smb3_is_transform_hdr,
3892         .receive_transform = smb3_receive_transform,
3893         .get_dfs_refer = smb2_get_dfs_refer,
3894         .select_sectype = smb2_select_sectype,
3895 #ifdef CONFIG_CIFS_XATTR
3896         .query_all_EAs = smb2_query_eas,
3897         .set_EA = smb2_set_ea,
3898 #endif /* CIFS_XATTR */
3899 #ifdef CONFIG_CIFS_ACL
3900         .get_acl = get_smb2_acl,
3901         .get_acl_by_fid = get_smb2_acl_by_fid,
3902         .set_acl = set_smb2_acl,
3903 #endif /* CIFS_ACL */
3904         .next_header = smb2_next_header,
3905         .ioctl_query_info = smb2_ioctl_query_info,
3906 };
3907
3908 struct smb_version_operations smb311_operations = {
3909         .compare_fids = smb2_compare_fids,
3910         .setup_request = smb2_setup_request,
3911         .setup_async_request = smb2_setup_async_request,
3912         .check_receive = smb2_check_receive,
3913         .add_credits = smb2_add_credits,
3914         .set_credits = smb2_set_credits,
3915         .get_credits_field = smb2_get_credits_field,
3916         .get_credits = smb2_get_credits,
3917         .wait_mtu_credits = smb2_wait_mtu_credits,
3918         .adjust_credits = smb2_adjust_credits,
3919         .get_next_mid = smb2_get_next_mid,
3920         .revert_current_mid = smb2_revert_current_mid,
3921         .read_data_offset = smb2_read_data_offset,
3922         .read_data_length = smb2_read_data_length,
3923         .map_error = map_smb2_to_linux_error,
3924         .find_mid = smb2_find_mid,
3925         .check_message = smb2_check_message,
3926         .dump_detail = smb2_dump_detail,
3927         .clear_stats = smb2_clear_stats,
3928         .print_stats = smb2_print_stats,
3929         .dump_share_caps = smb2_dump_share_caps,
3930         .is_oplock_break = smb2_is_valid_oplock_break,
3931         .handle_cancelled_mid = smb2_handle_cancelled_mid,
3932         .downgrade_oplock = smb21_downgrade_oplock,
3933         .need_neg = smb2_need_neg,
3934         .negotiate = smb2_negotiate,
3935         .negotiate_wsize = smb3_negotiate_wsize,
3936         .negotiate_rsize = smb3_negotiate_rsize,
3937         .sess_setup = SMB2_sess_setup,
3938         .logoff = SMB2_logoff,
3939         .tree_connect = SMB2_tcon,
3940         .tree_disconnect = SMB2_tdis,
3941         .qfs_tcon = smb3_qfs_tcon,
3942         .is_path_accessible = smb2_is_path_accessible,
3943         .can_echo = smb2_can_echo,
3944         .echo = SMB2_echo,
3945         .query_path_info = smb2_query_path_info,
3946         .get_srv_inum = smb2_get_srv_inum,
3947         .query_file_info = smb2_query_file_info,
3948         .set_path_size = smb2_set_path_size,
3949         .set_file_size = smb2_set_file_size,
3950         .set_file_info = smb2_set_file_info,
3951         .set_compression = smb2_set_compression,
3952         .mkdir = smb2_mkdir,
3953         .mkdir_setinfo = smb2_mkdir_setinfo,
3954         .posix_mkdir = smb311_posix_mkdir,
3955         .rmdir = smb2_rmdir,
3956         .unlink = smb2_unlink,
3957         .rename = smb2_rename_path,
3958         .create_hardlink = smb2_create_hardlink,
3959         .query_symlink = smb2_query_symlink,
3960         .query_mf_symlink = smb3_query_mf_symlink,
3961         .create_mf_symlink = smb3_create_mf_symlink,
3962         .open = smb2_open_file,
3963         .set_fid = smb2_set_fid,
3964         .close = smb2_close_file,
3965         .flush = smb2_flush_file,
3966         .async_readv = smb2_async_readv,
3967         .async_writev = smb2_async_writev,
3968         .sync_read = smb2_sync_read,
3969         .sync_write = smb2_sync_write,
3970         .query_dir_first = smb2_query_dir_first,
3971         .query_dir_next = smb2_query_dir_next,
3972         .close_dir = smb2_close_dir,
3973         .calc_smb_size = smb2_calc_size,
3974         .is_status_pending = smb2_is_status_pending,
3975         .is_session_expired = smb2_is_session_expired,
3976         .oplock_response = smb2_oplock_response,
3977         .queryfs = smb311_queryfs,
3978         .mand_lock = smb2_mand_lock,
3979         .mand_unlock_range = smb2_unlock_range,
3980         .push_mand_locks = smb2_push_mandatory_locks,
3981         .get_lease_key = smb2_get_lease_key,
3982         .set_lease_key = smb2_set_lease_key,
3983         .new_lease_key = smb2_new_lease_key,
3984         .generate_signingkey = generate_smb311signingkey,
3985         .calc_signature = smb3_calc_signature,
3986         .set_integrity  = smb3_set_integrity,
3987         .is_read_op = smb21_is_read_op,
3988         .set_oplock_level = smb3_set_oplock_level,
3989         .create_lease_buf = smb3_create_lease_buf,
3990         .parse_lease_buf = smb3_parse_lease_buf,
3991         .copychunk_range = smb2_copychunk_range,
3992         .duplicate_extents = smb2_duplicate_extents,
3993 /*      .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
3994         .wp_retry_size = smb2_wp_retry_size,
3995         .dir_needs_close = smb2_dir_needs_close,
3996         .fallocate = smb3_fallocate,
3997         .enum_snapshots = smb3_enum_snapshots,
3998         .init_transform_rq = smb3_init_transform_rq,
3999         .is_transform_hdr = smb3_is_transform_hdr,
4000         .receive_transform = smb3_receive_transform,
4001         .get_dfs_refer = smb2_get_dfs_refer,
4002         .select_sectype = smb2_select_sectype,
4003 #ifdef CONFIG_CIFS_XATTR
4004         .query_all_EAs = smb2_query_eas,
4005         .set_EA = smb2_set_ea,
4006 #endif /* CIFS_XATTR */
4007 #ifdef CONFIG_CIFS_ACL
4008         .get_acl = get_smb2_acl,
4009         .get_acl_by_fid = get_smb2_acl_by_fid,
4010         .set_acl = set_smb2_acl,
4011 #endif /* CIFS_ACL */
4012         .next_header = smb2_next_header,
4013         .ioctl_query_info = smb2_ioctl_query_info,
4014 };
4015
4016 struct smb_version_values smb20_values = {
4017         .version_string = SMB20_VERSION_STRING,
4018         .protocol_id = SMB20_PROT_ID,
4019         .req_capabilities = 0, /* MBZ */
4020         .large_lock_type = 0,
4021         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
4022         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
4023         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
4024         .header_size = sizeof(struct smb2_sync_hdr),
4025         .header_preamble_size = 0,
4026         .max_header_size = MAX_SMB2_HDR_SIZE,
4027         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
4028         .lock_cmd = SMB2_LOCK,
4029         .cap_unix = 0,
4030         .cap_nt_find = SMB2_NT_FIND,
4031         .cap_large_files = SMB2_LARGE_FILES,
4032         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
4033         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
4034         .create_lease_size = sizeof(struct create_lease),
4035 };
4036
4037 struct smb_version_values smb21_values = {
4038         .version_string = SMB21_VERSION_STRING,
4039         .protocol_id = SMB21_PROT_ID,
4040         .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
4041         .large_lock_type = 0,
4042         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
4043         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
4044         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
4045         .header_size = sizeof(struct smb2_sync_hdr),
4046         .header_preamble_size = 0,
4047         .max_header_size = MAX_SMB2_HDR_SIZE,
4048         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
4049         .lock_cmd = SMB2_LOCK,
4050         .cap_unix = 0,
4051         .cap_nt_find = SMB2_NT_FIND,
4052         .cap_large_files = SMB2_LARGE_FILES,
4053         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
4054         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
4055         .create_lease_size = sizeof(struct create_lease),
4056 };
4057
4058 struct smb_version_values smb3any_values = {
4059         .version_string = SMB3ANY_VERSION_STRING,
4060         .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
4061         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
4062         .large_lock_type = 0,
4063         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
4064         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
4065         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
4066         .header_size = sizeof(struct smb2_sync_hdr),
4067         .header_preamble_size = 0,
4068         .max_header_size = MAX_SMB2_HDR_SIZE,
4069         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
4070         .lock_cmd = SMB2_LOCK,
4071         .cap_unix = 0,
4072         .cap_nt_find = SMB2_NT_FIND,
4073         .cap_large_files = SMB2_LARGE_FILES,
4074         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
4075         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
4076         .create_lease_size = sizeof(struct create_lease_v2),
4077 };
4078
4079 struct smb_version_values smbdefault_values = {
4080         .version_string = SMBDEFAULT_VERSION_STRING,
4081         .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
4082         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
4083         .large_lock_type = 0,
4084         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
4085         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
4086         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
4087         .header_size = sizeof(struct smb2_sync_hdr),
4088         .header_preamble_size = 0,
4089         .max_header_size = MAX_SMB2_HDR_SIZE,
4090         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
4091         .lock_cmd = SMB2_LOCK,
4092         .cap_unix = 0,
4093         .cap_nt_find = SMB2_NT_FIND,
4094         .cap_large_files = SMB2_LARGE_FILES,
4095         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
4096         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
4097         .create_lease_size = sizeof(struct create_lease_v2),
4098 };
4099
4100 struct smb_version_values smb30_values = {
4101         .version_string = SMB30_VERSION_STRING,
4102         .protocol_id = SMB30_PROT_ID,
4103         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
4104         .large_lock_type = 0,
4105         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
4106         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
4107         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
4108         .header_size = sizeof(struct smb2_sync_hdr),
4109         .header_preamble_size = 0,
4110         .max_header_size = MAX_SMB2_HDR_SIZE,
4111         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
4112         .lock_cmd = SMB2_LOCK,
4113         .cap_unix = 0,
4114         .cap_nt_find = SMB2_NT_FIND,
4115         .cap_large_files = SMB2_LARGE_FILES,
4116         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
4117         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
4118         .create_lease_size = sizeof(struct create_lease_v2),
4119 };
4120
4121 struct smb_version_values smb302_values = {
4122         .version_string = SMB302_VERSION_STRING,
4123         .protocol_id = SMB302_PROT_ID,
4124         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
4125         .large_lock_type = 0,
4126         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
4127         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
4128         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
4129         .header_size = sizeof(struct smb2_sync_hdr),
4130         .header_preamble_size = 0,
4131         .max_header_size = MAX_SMB2_HDR_SIZE,
4132         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
4133         .lock_cmd = SMB2_LOCK,
4134         .cap_unix = 0,
4135         .cap_nt_find = SMB2_NT_FIND,
4136         .cap_large_files = SMB2_LARGE_FILES,
4137         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
4138         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
4139         .create_lease_size = sizeof(struct create_lease_v2),
4140 };
4141
4142 struct smb_version_values smb311_values = {
4143         .version_string = SMB311_VERSION_STRING,
4144         .protocol_id = SMB311_PROT_ID,
4145         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
4146         .large_lock_type = 0,
4147         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
4148         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
4149         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
4150         .header_size = sizeof(struct smb2_sync_hdr),
4151         .header_preamble_size = 0,
4152         .max_header_size = MAX_SMB2_HDR_SIZE,
4153         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
4154         .lock_cmd = SMB2_LOCK,
4155         .cap_unix = 0,
4156         .cap_nt_find = SMB2_NT_FIND,
4157         .cap_large_files = SMB2_LARGE_FILES,
4158         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
4159         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
4160         .create_lease_size = sizeof(struct create_lease_v2),
4161 };