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 "cifsglob.h"
  24 #include "smb2pdu.h"
  25 #include "smb2proto.h"
  26 #include "cifsproto.h"
  27 #include "cifs_debug.h"
  28 #include "cifs_unicode.h"
  29 #include "smb2status.h"
  30 #include "smb2glob.h"
  31 #include "cifs_ioctl.h"
  32
  33 static int
  34 change_conf(struct TCP_Server_Info *server)
  35 {
  36         server->credits += server->echo_credits + server->oplock_credits;
  37         server->oplock_credits = server->echo_credits = 0;
  38         switch (server->credits) {
  39         case 0:
  40                 return -1;
  41         case 1:
  42                 server->echoes = false;
  43                 server->oplocks = false;
  44                 cifs_dbg(VFS, "disabling echoes and oplocks\n");
  45                 break;
  46         case 2:
  47                 server->echoes = true;
  48                 server->oplocks = false;
  49                 server->echo_credits = 1;
  50                 cifs_dbg(FYI, "disabling oplocks\n");
  51                 break;
  52         default:
  53                 server->echoes = true;
  54                 if (enable_oplocks) {
  55                         server->oplocks = true;
  56                         server->oplock_credits = 1;
  57                 } else
  58                         server->oplocks = false;
  59
  60                 server->echo_credits = 1;
  61         }
  62         server->credits -= server->echo_credits + server->oplock_credits;
  63         return 0;
  64 }
  65
  66 static void
  67 smb2_add_credits(struct TCP_Server_Info *server, const unsigned int add,
  68                  const int optype)
  69 {
  70         int *val, rc = 0;
  71         spin_lock(&server->req_lock);
  72         val = server->ops->get_credits_field(server, optype);
  73         *val += add;
  74         if (*val > 65000) {
  75                 *val = 65000; /* Don't get near 64K credits, avoid srv bugs */
  76                 printk_once(KERN_WARNING "server overflowed SMB3 credits\n");
  77         }
  78         server->in_flight--;
  79         if (server->in_flight == 0 && (optype & CIFS_OP_MASK) != CIFS_NEG_OP)
  80                 rc = change_conf(server);
  81         /*
  82          * Sometimes server returns 0 credits on oplock break ack - we need to
  83          * rebalance credits in this case.
  84          */
  85         else if (server->in_flight > 0 && server->oplock_credits == 0 &&
  86                  server->oplocks) {
  87                 if (server->credits > 1) {
  88                         server->credits--;
  89                         server->oplock_credits++;
  90                 }
  91         }
  92         spin_unlock(&server->req_lock);
  93         wake_up(&server->request_q);
  94         if (rc)
  95                 cifs_reconnect(server);
  96 }
  97
  98 static void
  99 smb2_set_credits(struct TCP_Server_Info *server, const int val)
 100 {
 101         spin_lock(&server->req_lock);
 102         server->credits = val;
 103         spin_unlock(&server->req_lock);
 104 }
 105
 106 static int *
 107 smb2_get_credits_field(struct TCP_Server_Info *server, const int optype)
 108 {
 109         switch (optype) {
 110         case CIFS_ECHO_OP:
 111                 return &server->echo_credits;
 112         case CIFS_OBREAK_OP:
 113                 return &server->oplock_credits;
 114         default:
 115                 return &server->credits;
 116         }
 117 }
 118
 119 static unsigned int
 120 smb2_get_credits(struct mid_q_entry *mid)
 121 {
 122         return le16_to_cpu(((struct smb2_hdr *)mid->resp_buf)->CreditRequest);
 123 }
 124
 125 static int
 126 smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size,
 127                       unsigned int *num, unsigned int *credits)
 128 {
 129         int rc = 0;
 130         unsigned int scredits;
 131
 132         spin_lock(&server->req_lock);
 133         while (1) {
 134                 if (server->credits <= 0) {
 135                         spin_unlock(&server->req_lock);
 136                         cifs_num_waiters_inc(server);
 137                         rc = wait_event_killable(server->request_q,
 138                                         has_credits(server, &server->credits));
 139                         cifs_num_waiters_dec(server);
 140                         if (rc)
 141                                 return rc;
 142                         spin_lock(&server->req_lock);
 143                 } else {
 144                         if (server->tcpStatus == CifsExiting) {
 145                                 spin_unlock(&server->req_lock);
 146                                 return -ENOENT;
 147                         }
 148
 149                         scredits = server->credits;
 150                         /* can deadlock with reopen */
 151                         if (scredits == 1) {
 152                                 *num = SMB2_MAX_BUFFER_SIZE;
 153                                 *credits = 0;
 154                                 break;
 155                         }
 156
 157                         /* leave one credit for a possible reopen */
 158                         scredits--;
 159                         *num = min_t(unsigned int, size,
 160                                      scredits * SMB2_MAX_BUFFER_SIZE);
 161
 162                         *credits = DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE);
 163                         server->credits -= *credits;
 164                         server->in_flight++;
 165                         break;
 166                 }
 167         }
 168         spin_unlock(&server->req_lock);
 169         return rc;
 170 }
 171
 172 static __u64
 173 smb2_get_next_mid(struct TCP_Server_Info *server)
 174 {
 175         __u64 mid;
 176         /* for SMB2 we need the current value */
 177         spin_lock(&GlobalMid_Lock);
 178         mid = server->CurrentMid++;
 179         spin_unlock(&GlobalMid_Lock);
 180         return mid;
 181 }
 182
 183 static struct mid_q_entry *
 184 smb2_find_mid(struct TCP_Server_Info *server, char *buf)
 185 {
 186         struct mid_q_entry *mid;
 187         struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
 188         __u64 wire_mid = le64_to_cpu(hdr->MessageId);
 189
 190         if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {
 191                 cifs_dbg(VFS, "encrypted frame parsing not supported yet");
 192                 return NULL;
 193         }
 194
 195         spin_lock(&GlobalMid_Lock);
 196         list_for_each_entry(mid, &server->pending_mid_q, qhead) {
 197                 if ((mid->mid == wire_mid) &&
 198                     (mid->mid_state == MID_REQUEST_SUBMITTED) &&
 199                     (mid->command == hdr->Command)) {
 200                         spin_unlock(&GlobalMid_Lock);
 201                         return mid;
 202                 }
 203         }
 204         spin_unlock(&GlobalMid_Lock);
 205         return NULL;
 206 }
 207
 208 static void
 209 smb2_dump_detail(void *buf)
 210 {
 211 #ifdef CONFIG_CIFS_DEBUG2
 212         struct smb2_hdr *smb = (struct smb2_hdr *)buf;
 213
 214         cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
 215                  smb->Command, smb->Status, smb->Flags, smb->MessageId,
 216                  smb->ProcessId);
 217         cifs_dbg(VFS, "smb buf %p len %u\n", smb, smb2_calc_size(smb));
 218 #endif
 219 }
 220
 221 static bool
 222 smb2_need_neg(struct TCP_Server_Info *server)
 223 {
 224         return server->max_read == 0;
 225 }
 226
 227 static int
 228 smb2_negotiate(const unsigned int xid, struct cifs_ses *ses)
 229 {
 230         int rc;
 231         ses->server->CurrentMid = 0;
 232         rc = SMB2_negotiate(xid, ses);
 233         /* BB we probably don't need to retry with modern servers */
 234         if (rc == -EAGAIN)
 235                 rc = -EHOSTDOWN;
 236         return rc;
 237 }
 238
 239 static unsigned int
 240 smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 241 {
 242         struct TCP_Server_Info *server = tcon->ses->server;
 243         unsigned int wsize;
 244
 245         /* start with specified wsize, or default */
 246         wsize = volume_info->wsize ? volume_info->wsize : CIFS_DEFAULT_IOSIZE;
 247         wsize = min_t(unsigned int, wsize, server->max_write);
 248
 249         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 250                 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
 251
 252         return wsize;
 253 }
 254
 255 static unsigned int
 256 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 257 {
 258         struct TCP_Server_Info *server = tcon->ses->server;
 259         unsigned int rsize;
 260
 261         /* start with specified rsize, or default */
 262         rsize = volume_info->rsize ? volume_info->rsize : CIFS_DEFAULT_IOSIZE;
 263         rsize = min_t(unsigned int, rsize, server->max_read);
 264
 265         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 266                 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
 267
 268         return rsize;
 269 }
 270
 271 #ifdef CONFIG_CIFS_STATS2
 272 static int
 273 SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon)
 274 {
 275         int rc;
 276         unsigned int ret_data_len = 0;
 277         struct network_interface_info_ioctl_rsp *out_buf;
 278
 279         rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
 280                         FSCTL_QUERY_NETWORK_INTERFACE_INFO, true /* is_fsctl */,
 281                         NULL /* no data input */, 0 /* no data input */,
 282                         (char **)&out_buf, &ret_data_len);
 283         if (rc != 0)
 284                 cifs_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
 285         else if (ret_data_len < sizeof(struct network_interface_info_ioctl_rsp)) {
 286                 cifs_dbg(VFS, "server returned bad net interface info buf\n");
 287                 rc = -EINVAL;
 288         } else {
 289                 /* Dump info on first interface */
 290                 cifs_dbg(FYI, "Adapter Capability 0x%x\t",
 291                         le32_to_cpu(out_buf->Capability));
 292                 cifs_dbg(FYI, "Link Speed %lld\n",
 293                         le64_to_cpu(out_buf->LinkSpeed));
 294         }
 295         kfree(out_buf);
 296         return rc;
 297 }
 298 #endif /* STATS2 */
 299
 300 static void
 301 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
 302 {
 303         int rc;
 304         __le16 srch_path = 0; /* Null - open root of share */
 305         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 306         struct cifs_open_parms oparms;
 307         struct cifs_fid fid;
 308
 309         oparms.tcon = tcon;
 310         oparms.desired_access = FILE_READ_ATTRIBUTES;
 311         oparms.disposition = FILE_OPEN;
 312         oparms.create_options = 0;
 313         oparms.fid = &fid;
 314         oparms.reconnect = false;
 315
 316         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
 317         if (rc)
 318                 return;
 319
 320 #ifdef CONFIG_CIFS_STATS2
 321         SMB3_request_interfaces(xid, tcon);
 322 #endif /* STATS2 */
 323
 324         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 325                         FS_ATTRIBUTE_INFORMATION);
 326         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 327                         FS_DEVICE_INFORMATION);
 328         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 329                         FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
 330         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 331         return;
 332 }
 333
 334 static void
 335 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
 336 {
 337         int rc;
 338         __le16 srch_path = 0; /* Null - open root of share */
 339         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 340         struct cifs_open_parms oparms;
 341         struct cifs_fid fid;
 342
 343         oparms.tcon = tcon;
 344         oparms.desired_access = FILE_READ_ATTRIBUTES;
 345         oparms.disposition = FILE_OPEN;
 346         oparms.create_options = 0;
 347         oparms.fid = &fid;
 348         oparms.reconnect = false;
 349
 350         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
 351         if (rc)
 352                 return;
 353
 354         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 355                         FS_ATTRIBUTE_INFORMATION);
 356         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 357                         FS_DEVICE_INFORMATION);
 358         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 359         return;
 360 }
 361
 362 static int
 363 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
 364                         struct cifs_sb_info *cifs_sb, const char *full_path)
 365 {
 366         int rc;
 367         __le16 *utf16_path;
 368         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 369         struct cifs_open_parms oparms;
 370         struct cifs_fid fid;
 371
 372         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
 373         if (!utf16_path)
 374                 return -ENOMEM;
 375
 376         oparms.tcon = tcon;
 377         oparms.desired_access = FILE_READ_ATTRIBUTES;
 378         oparms.disposition = FILE_OPEN;
 379         oparms.create_options = 0;
 380         oparms.fid = &fid;
 381         oparms.reconnect = false;
 382
 383         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
 384         if (rc) {
 385                 kfree(utf16_path);
 386                 return rc;
 387         }
 388
 389         rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 390         kfree(utf16_path);
 391         return rc;
 392 }
 393
 394 static int
 395 smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
 396                   struct cifs_sb_info *cifs_sb, const char *full_path,
 397                   u64 *uniqueid, FILE_ALL_INFO *data)
 398 {
 399         *uniqueid = le64_to_cpu(data->IndexNumber);
 400         return 0;
 401 }
 402
 403 static int
 404 smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
 405                      struct cifs_fid *fid, FILE_ALL_INFO *data)
 406 {
 407         int rc;
 408         struct smb2_file_all_info *smb2_data;
 409
 410         smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
 411                             GFP_KERNEL);
 412         if (smb2_data == NULL)
 413                 return -ENOMEM;
 414
 415         rc = SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid,
 416                              smb2_data);
 417         if (!rc)
 418                 move_smb2_info_to_cifs(data, smb2_data);
 419         kfree(smb2_data);
 420         return rc;
 421 }
 422
 423 static bool
 424 smb2_can_echo(struct TCP_Server_Info *server)
 425 {
 426         return server->echoes;
 427 }
 428
 429 static void
 430 smb2_clear_stats(struct cifs_tcon *tcon)
 431 {
 432 #ifdef CONFIG_CIFS_STATS
 433         int i;
 434         for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
 435                 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
 436                 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
 437         }
 438 #endif
 439 }
 440
 441 static void
 442 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
 443 {
 444         seq_puts(m, "\n\tShare Capabilities:");
 445         if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
 446                 seq_puts(m, " DFS,");
 447         if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
 448                 seq_puts(m, " CONTINUOUS AVAILABILITY,");
 449         if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
 450                 seq_puts(m, " SCALEOUT,");
 451         if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
 452                 seq_puts(m, " CLUSTER,");
 453         if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
 454                 seq_puts(m, " ASYMMETRIC,");
 455         if (tcon->capabilities == 0)
 456                 seq_puts(m, " None");
 457         if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
 458                 seq_puts(m, " Aligned,");
 459         if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
 460                 seq_puts(m, " Partition Aligned,");
 461         if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
 462                 seq_puts(m, " SSD,");
 463         if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
 464                 seq_puts(m, " TRIM-support,");
 465
 466         seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
 467         if (tcon->perf_sector_size)
 468                 seq_printf(m, "\tOptimal sector size: 0x%x",
 469                            tcon->perf_sector_size);
 470 }
 471
 472 static void
 473 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
 474 {
 475 #ifdef CONFIG_CIFS_STATS
 476         atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
 477         atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
 478         seq_printf(m, "\nNegotiates: %d sent %d failed",
 479                    atomic_read(&sent[SMB2_NEGOTIATE_HE]),
 480                    atomic_read(&failed[SMB2_NEGOTIATE_HE]));
 481         seq_printf(m, "\nSessionSetups: %d sent %d failed",
 482                    atomic_read(&sent[SMB2_SESSION_SETUP_HE]),
 483                    atomic_read(&failed[SMB2_SESSION_SETUP_HE]));
 484         seq_printf(m, "\nLogoffs: %d sent %d failed",
 485                    atomic_read(&sent[SMB2_LOGOFF_HE]),
 486                    atomic_read(&failed[SMB2_LOGOFF_HE]));
 487         seq_printf(m, "\nTreeConnects: %d sent %d failed",
 488                    atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
 489                    atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
 490         seq_printf(m, "\nTreeDisconnects: %d sent %d failed",
 491                    atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
 492                    atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
 493         seq_printf(m, "\nCreates: %d sent %d failed",
 494                    atomic_read(&sent[SMB2_CREATE_HE]),
 495                    atomic_read(&failed[SMB2_CREATE_HE]));
 496         seq_printf(m, "\nCloses: %d sent %d failed",
 497                    atomic_read(&sent[SMB2_CLOSE_HE]),
 498                    atomic_read(&failed[SMB2_CLOSE_HE]));
 499         seq_printf(m, "\nFlushes: %d sent %d failed",
 500                    atomic_read(&sent[SMB2_FLUSH_HE]),
 501                    atomic_read(&failed[SMB2_FLUSH_HE]));
 502         seq_printf(m, "\nReads: %d sent %d failed",
 503                    atomic_read(&sent[SMB2_READ_HE]),
 504                    atomic_read(&failed[SMB2_READ_HE]));
 505         seq_printf(m, "\nWrites: %d sent %d failed",
 506                    atomic_read(&sent[SMB2_WRITE_HE]),
 507                    atomic_read(&failed[SMB2_WRITE_HE]));
 508         seq_printf(m, "\nLocks: %d sent %d failed",
 509                    atomic_read(&sent[SMB2_LOCK_HE]),
 510                    atomic_read(&failed[SMB2_LOCK_HE]));
 511         seq_printf(m, "\nIOCTLs: %d sent %d failed",
 512                    atomic_read(&sent[SMB2_IOCTL_HE]),
 513                    atomic_read(&failed[SMB2_IOCTL_HE]));
 514         seq_printf(m, "\nCancels: %d sent %d failed",
 515                    atomic_read(&sent[SMB2_CANCEL_HE]),
 516                    atomic_read(&failed[SMB2_CANCEL_HE]));
 517         seq_printf(m, "\nEchos: %d sent %d failed",
 518                    atomic_read(&sent[SMB2_ECHO_HE]),
 519                    atomic_read(&failed[SMB2_ECHO_HE]));
 520         seq_printf(m, "\nQueryDirectories: %d sent %d failed",
 521                    atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
 522                    atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
 523         seq_printf(m, "\nChangeNotifies: %d sent %d failed",
 524                    atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
 525                    atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
 526         seq_printf(m, "\nQueryInfos: %d sent %d failed",
 527                    atomic_read(&sent[SMB2_QUERY_INFO_HE]),
 528                    atomic_read(&failed[SMB2_QUERY_INFO_HE]));
 529         seq_printf(m, "\nSetInfos: %d sent %d failed",
 530                    atomic_read(&sent[SMB2_SET_INFO_HE]),
 531                    atomic_read(&failed[SMB2_SET_INFO_HE]));
 532         seq_printf(m, "\nOplockBreaks: %d sent %d failed",
 533                    atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
 534                    atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
 535 #endif
 536 }
 537
 538 static void
 539 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
 540 {
 541         struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
 542         struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
 543
 544         cfile->fid.persistent_fid = fid->persistent_fid;
 545         cfile->fid.volatile_fid = fid->volatile_fid;
 546         server->ops->set_oplock_level(cinode, oplock, fid->epoch,
 547                                       &fid->purge_cache);
 548         cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
 549         memcpy(cfile->fid.create_guid, fid->create_guid, 16);
 550 }
 551
 552 static void
 553 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
 554                 struct cifs_fid *fid)
 555 {
 556         SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 557 }
 558
 559 static int
 560 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
 561                      u64 persistent_fid, u64 volatile_fid,
 562                      struct copychunk_ioctl *pcchunk)
 563 {
 564         int rc;
 565         unsigned int ret_data_len;
 566         struct resume_key_req *res_key;
 567
 568         rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
 569                         FSCTL_SRV_REQUEST_RESUME_KEY, true /* is_fsctl */,
 570                         NULL, 0 /* no input */,
 571                         (char **)&res_key, &ret_data_len);
 572
 573         if (rc) {
 574                 cifs_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
 575                 goto req_res_key_exit;
 576         }
 577         if (ret_data_len < sizeof(struct resume_key_req)) {
 578                 cifs_dbg(VFS, "Invalid refcopy resume key length\n");
 579                 rc = -EINVAL;
 580                 goto req_res_key_exit;
 581         }
 582         memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
 583
 584 req_res_key_exit:
 585         kfree(res_key);
 586         return rc;
 587 }
 588
 589 static int
 590 smb2_clone_range(const unsigned int xid,
 591                         struct cifsFileInfo *srcfile,
 592                         struct cifsFileInfo *trgtfile, u64 src_off,
 593                         u64 len, u64 dest_off)
 594 {
 595         int rc;
 596         unsigned int ret_data_len;
 597         struct copychunk_ioctl *pcchunk;
 598         struct copychunk_ioctl_rsp *retbuf = NULL;
 599         struct cifs_tcon *tcon;
 600         int chunks_copied = 0;
 601         bool chunk_sizes_updated = false;
 602
 603         pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
 604
 605         if (pcchunk == NULL)
 606                 return -ENOMEM;
 607
 608         cifs_dbg(FYI, "in smb2_clone_range - about to call request res key\n");
 609         /* Request a key from the server to identify the source of the copy */
 610         rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
 611                                 srcfile->fid.persistent_fid,
 612                                 srcfile->fid.volatile_fid, pcchunk);
 613
 614         /* Note: request_res_key sets res_key null only if rc !=0 */
 615         if (rc)
 616                 goto cchunk_out;
 617
 618         /* For now array only one chunk long, will make more flexible later */
 619         pcchunk->ChunkCount = cpu_to_le32(1);
 620         pcchunk->Reserved = 0;
 621         pcchunk->Reserved2 = 0;
 622
 623         tcon = tlink_tcon(trgtfile->tlink);
 624
 625         while (len > 0) {
 626                 pcchunk->SourceOffset = cpu_to_le64(src_off);
 627                 pcchunk->TargetOffset = cpu_to_le64(dest_off);
 628                 pcchunk->Length =
 629                         cpu_to_le32(min_t(u32, len, tcon->max_bytes_chunk));
 630
 631                 /* Request server copy to target from src identified by key */
 632                 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
 633                         trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
 634                         true /* is_fsctl */, (char *)pcchunk,
 635                         sizeof(struct copychunk_ioctl), (char **)&retbuf,
 636                         &ret_data_len);
 637                 if (rc == 0) {
 638                         if (ret_data_len !=
 639                                         sizeof(struct copychunk_ioctl_rsp)) {
 640                                 cifs_dbg(VFS, "invalid cchunk response size\n");
 641                                 rc = -EIO;
 642                                 goto cchunk_out;
 643                         }
 644                         if (retbuf->TotalBytesWritten == 0) {
 645                                 cifs_dbg(FYI, "no bytes copied\n");
 646                                 rc = -EIO;
 647                                 goto cchunk_out;
 648                         }
 649                         /*
 650                          * Check if server claimed to write more than we asked
 651                          */
 652                         if (le32_to_cpu(retbuf->TotalBytesWritten) >
 653                             le32_to_cpu(pcchunk->Length)) {
 654                                 cifs_dbg(VFS, "invalid copy chunk response\n");
 655                                 rc = -EIO;
 656                                 goto cchunk_out;
 657                         }
 658                         if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
 659                                 cifs_dbg(VFS, "invalid num chunks written\n");
 660                                 rc = -EIO;
 661                                 goto cchunk_out;
 662                         }
 663                         chunks_copied++;
 664
 665                         src_off += le32_to_cpu(retbuf->TotalBytesWritten);
 666                         dest_off += le32_to_cpu(retbuf->TotalBytesWritten);
 667                         len -= le32_to_cpu(retbuf->TotalBytesWritten);
 668
 669                         cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %d\n",
 670                                 le32_to_cpu(retbuf->ChunksWritten),
 671                                 le32_to_cpu(retbuf->ChunkBytesWritten),
 672                                 le32_to_cpu(retbuf->TotalBytesWritten));
 673                 } else if (rc == -EINVAL) {
 674                         if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
 675                                 goto cchunk_out;
 676
 677                         cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
 678                                 le32_to_cpu(retbuf->ChunksWritten),
 679                                 le32_to_cpu(retbuf->ChunkBytesWritten),
 680                                 le32_to_cpu(retbuf->TotalBytesWritten));
 681
 682                         /*
 683                          * Check if this is the first request using these sizes,
 684                          * (ie check if copy succeed once with original sizes
 685                          * and check if the server gave us different sizes after
 686                          * we already updated max sizes on previous request).
 687                          * if not then why is the server returning an error now
 688                          */
 689                         if ((chunks_copied != 0) || chunk_sizes_updated)
 690                                 goto cchunk_out;
 691
 692                         /* Check that server is not asking us to grow size */
 693                         if (le32_to_cpu(retbuf->ChunkBytesWritten) <
 694                                         tcon->max_bytes_chunk)
 695                                 tcon->max_bytes_chunk =
 696                                         le32_to_cpu(retbuf->ChunkBytesWritten);
 697                         else
 698                                 goto cchunk_out; /* server gave us bogus size */
 699
 700                         /* No need to change MaxChunks since already set to 1 */
 701                         chunk_sizes_updated = true;
 702                 } else
 703                         goto cchunk_out;
 704         }
 705
 706 cchunk_out:
 707         kfree(pcchunk);
 708         kfree(retbuf);
 709         return rc;
 710 }
 711
 712 static int
 713 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
 714                 struct cifs_fid *fid)
 715 {
 716         return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 717 }
 718
 719 static unsigned int
 720 smb2_read_data_offset(char *buf)
 721 {
 722         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
 723         return rsp->DataOffset;
 724 }
 725
 726 static unsigned int
 727 smb2_read_data_length(char *buf)
 728 {
 729         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
 730         return le32_to_cpu(rsp->DataLength);
 731 }
 732
 733
 734 static int
 735 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,
 736                struct cifs_io_parms *parms, unsigned int *bytes_read,
 737                char **buf, int *buf_type)
 738 {
 739         parms->persistent_fid = pfid->persistent_fid;
 740         parms->volatile_fid = pfid->volatile_fid;
 741         return SMB2_read(xid, parms, bytes_read, buf, buf_type);
 742 }
 743
 744 static int
 745 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,
 746                 struct cifs_io_parms *parms, unsigned int *written,
 747                 struct kvec *iov, unsigned long nr_segs)
 748 {
 749
 750         parms->persistent_fid = pfid->persistent_fid;
 751         parms->volatile_fid = pfid->volatile_fid;
 752         return SMB2_write(xid, parms, written, iov, nr_segs);
 753 }
 754
 755 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
 756 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
 757                 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
 758 {
 759         struct cifsInodeInfo *cifsi;
 760         int rc;
 761
 762         cifsi = CIFS_I(inode);
 763
 764         /* if file already sparse don't bother setting sparse again */
 765         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
 766                 return true; /* already sparse */
 767
 768         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
 769                 return true; /* already not sparse */
 770
 771         /*
 772          * Can't check for sparse support on share the usual way via the
 773          * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
 774          * since Samba server doesn't set the flag on the share, yet
 775          * supports the set sparse FSCTL and returns sparse correctly
 776          * in the file attributes. If we fail setting sparse though we
 777          * mark that server does not support sparse files for this share
 778          * to avoid repeatedly sending the unsupported fsctl to server
 779          * if the file is repeatedly extended.
 780          */
 781         if (tcon->broken_sparse_sup)
 782                 return false;
 783
 784         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
 785                         cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
 786                         true /* is_fctl */, &setsparse, 1, NULL, NULL);
 787         if (rc) {
 788                 tcon->broken_sparse_sup = true;
 789                 cifs_dbg(FYI, "set sparse rc = %d\n", rc);
 790                 return false;
 791         }
 792
 793         if (setsparse)
 794                 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
 795         else
 796                 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
 797
 798         return true;
 799 }
 800
 801 static int
 802 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
 803                    struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
 804 {
 805         __le64 eof = cpu_to_le64(size);
 806         struct inode *inode;
 807
 808         /*
 809          * If extending file more than one page make sparse. Many Linux fs
 810          * make files sparse by default when extending via ftruncate
 811          */
 812         inode = d_inode(cfile->dentry);
 813
 814         if (!set_alloc && (size > inode->i_size + 8192)) {
 815                 __u8 set_sparse = 1;
 816
 817                 /* whether set sparse succeeds or not, extend the file */
 818                 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
 819         }
 820
 821         return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
 822                             cfile->fid.volatile_fid, cfile->pid, &eof, false);
 823 }
 824
 825 static int
 826 smb2_duplicate_extents(const unsigned int xid,
 827                         struct cifsFileInfo *srcfile,
 828                         struct cifsFileInfo *trgtfile, u64 src_off,
 829                         u64 len, u64 dest_off)
 830 {
 831         int rc;
 832         unsigned int ret_data_len;
 833         struct duplicate_extents_to_file dup_ext_buf;
 834         struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink);
 835
 836         /* server fileays advertise duplicate extent support with this flag */
 837         if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) &
 838              FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0)
 839                 return -EOPNOTSUPP;
 840
 841         dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid;
 842         dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid;
 843         dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off);
 844         dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off);
 845         dup_ext_buf.ByteCount = cpu_to_le64(len);
 846         cifs_dbg(FYI, "duplicate extents: src off %lld dst off %lld len %lld",
 847                 src_off, dest_off, len);
 848
 849         rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false);
 850         if (rc)
 851                 goto duplicate_extents_out;
 852
 853         rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
 854                         trgtfile->fid.volatile_fid,
 855                         FSCTL_DUPLICATE_EXTENTS_TO_FILE,
 856                         true /* is_fsctl */, (char *)&dup_ext_buf,
 857                         sizeof(struct duplicate_extents_to_file),
 858                         NULL,
 859                         &ret_data_len);
 860
 861         if (ret_data_len > 0)
 862                 cifs_dbg(FYI, "non-zero response length in duplicate extents");
 863
 864 duplicate_extents_out:
 865         return rc;
 866 }
 867
 868 static int
 869 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
 870                    struct cifsFileInfo *cfile)
 871 {
 872         return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
 873                             cfile->fid.volatile_fid);
 874 }
 875
 876 static int
 877 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
 878                    struct cifsFileInfo *cfile)
 879 {
 880         struct fsctl_set_integrity_information_req integr_info;
 881         unsigned int ret_data_len;
 882
 883         integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED);
 884         integr_info.Flags = 0;
 885         integr_info.Reserved = 0;
 886
 887         return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
 888                         cfile->fid.volatile_fid,
 889                         FSCTL_SET_INTEGRITY_INFORMATION,
 890                         true /* is_fsctl */, (char *)&integr_info,
 891                         sizeof(struct fsctl_set_integrity_information_req),
 892                         NULL,
 893                         &ret_data_len);
 894
 895 }
 896
 897 static int
 898 smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon,
 899                    struct cifsFileInfo *cfile, void __user *ioc_buf)
 900 {
 901         char *retbuf = NULL;
 902         unsigned int ret_data_len = 0;
 903         int rc;
 904         struct smb_snapshot_array snapshot_in;
 905
 906         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
 907                         cfile->fid.volatile_fid,
 908                         FSCTL_SRV_ENUMERATE_SNAPSHOTS,
 909                         true /* is_fsctl */, NULL, 0 /* no input data */,
 910                         (char **)&retbuf,
 911                         &ret_data_len);
 912         cifs_dbg(FYI, "enum snaphots ioctl returned %d and ret buflen is %d\n",
 913                         rc, ret_data_len);
 914         if (rc)
 915                 return rc;
 916
 917         if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) {
 918                 /* Fixup buffer */
 919                 if (copy_from_user(&snapshot_in, ioc_buf,
 920                     sizeof(struct smb_snapshot_array))) {
 921                         rc = -EFAULT;
 922                         kfree(retbuf);
 923                         return rc;
 924                 }
 925                 if (snapshot_in.snapshot_array_size < sizeof(struct smb_snapshot_array)) {
 926                         rc = -ERANGE;
 927                         return rc;
 928                 }
 929
 930                 if (ret_data_len > snapshot_in.snapshot_array_size)
 931                         ret_data_len = snapshot_in.snapshot_array_size;
 932
 933                 if (copy_to_user(ioc_buf, retbuf, ret_data_len))
 934                         rc = -EFAULT;
 935         }
 936
 937         kfree(retbuf);
 938         return rc;
 939 }
 940
 941 static int
 942 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
 943                      const char *path, struct cifs_sb_info *cifs_sb,
 944                      struct cifs_fid *fid, __u16 search_flags,
 945                      struct cifs_search_info *srch_inf)
 946 {
 947         __le16 *utf16_path;
 948         int rc;
 949         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 950         struct cifs_open_parms oparms;
 951
 952         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
 953         if (!utf16_path)
 954                 return -ENOMEM;
 955
 956         oparms.tcon = tcon;
 957         oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
 958         oparms.disposition = FILE_OPEN;
 959         oparms.create_options = 0;
 960         oparms.fid = fid;
 961         oparms.reconnect = false;
 962
 963         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
 964         kfree(utf16_path);
 965         if (rc) {
 966                 cifs_dbg(VFS, "open dir failed\n");
 967                 return rc;
 968         }
 969
 970         srch_inf->entries_in_buffer = 0;
 971         srch_inf->index_of_last_entry = 0;
 972
 973         rc = SMB2_query_directory(xid, tcon, fid->persistent_fid,
 974                                   fid->volatile_fid, 0, srch_inf);
 975         if (rc) {
 976                 cifs_dbg(VFS, "query directory failed\n");
 977                 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 978         }
 979         return rc;
 980 }
 981
 982 static int
 983 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
 984                     struct cifs_fid *fid, __u16 search_flags,
 985                     struct cifs_search_info *srch_inf)
 986 {
 987         return SMB2_query_directory(xid, tcon, fid->persistent_fid,
 988                                     fid->volatile_fid, 0, srch_inf);
 989 }
 990
 991 static int
 992 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
 993                struct cifs_fid *fid)
 994 {
 995         return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 996 }
 997
 998 /*
 999 * If we negotiate SMB2 protocol and get STATUS_PENDING - update
1000 * the number of credits and return true. Otherwise - return false.
1001 */
1002 static bool
1003 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server, int length)
1004 {
1005         struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
1006
1007         if (hdr->Status != STATUS_PENDING)
1008                 return false;
1009
1010         if (!length) {
1011                 spin_lock(&server->req_lock);
1012                 server->credits += le16_to_cpu(hdr->CreditRequest);
1013                 spin_unlock(&server->req_lock);
1014                 wake_up(&server->request_q);
1015         }
1016
1017         return true;
1018 }
1019
1020 static int
1021 smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
1022                      struct cifsInodeInfo *cinode)
1023 {
1024         if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
1025                 return SMB2_lease_break(0, tcon, cinode->lease_key,
1026                                         smb2_get_lease_state(cinode));
1027
1028         return SMB2_oplock_break(0, tcon, fid->persistent_fid,
1029                                  fid->volatile_fid,
1030                                  CIFS_CACHE_READ(cinode) ? 1 : 0);
1031 }
1032
1033 static int
1034 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
1035              struct kstatfs *buf)
1036 {
1037         int rc;
1038         __le16 srch_path = 0; /* Null - open root of share */
1039         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1040         struct cifs_open_parms oparms;
1041         struct cifs_fid fid;
1042
1043         oparms.tcon = tcon;
1044         oparms.desired_access = FILE_READ_ATTRIBUTES;
1045         oparms.disposition = FILE_OPEN;
1046         oparms.create_options = 0;
1047         oparms.fid = &fid;
1048         oparms.reconnect = false;
1049
1050         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
1051         if (rc)
1052                 return rc;
1053         buf->f_type = SMB2_MAGIC_NUMBER;
1054         rc = SMB2_QFS_info(xid, tcon, fid.persistent_fid, fid.volatile_fid,
1055                            buf);
1056         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
1057         return rc;
1058 }
1059
1060 static bool
1061 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
1062 {
1063         return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
1064                ob1->fid.volatile_fid == ob2->fid.volatile_fid;
1065 }
1066
1067 static int
1068 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
1069                __u64 length, __u32 type, int lock, int unlock, bool wait)
1070 {
1071         if (unlock && !lock)
1072                 type = SMB2_LOCKFLAG_UNLOCK;
1073         return SMB2_lock(xid, tlink_tcon(cfile->tlink),
1074                          cfile->fid.persistent_fid, cfile->fid.volatile_fid,
1075                          current->tgid, length, offset, type, wait);
1076 }
1077
1078 static void
1079 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
1080 {
1081         memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
1082 }
1083
1084 static void
1085 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
1086 {
1087         memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
1088 }
1089
1090 static void
1091 smb2_new_lease_key(struct cifs_fid *fid)
1092 {
1093         generate_random_uuid(fid->lease_key);
1094 }
1095
1096 #define SMB2_SYMLINK_STRUCT_SIZE \
1097         (sizeof(struct smb2_err_rsp) - 1 + sizeof(struct smb2_symlink_err_rsp))
1098
1099 static int
1100 smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
1101                    const char *full_path, char **target_path,
1102                    struct cifs_sb_info *cifs_sb)
1103 {
1104         int rc;
1105         __le16 *utf16_path;
1106         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1107         struct cifs_open_parms oparms;
1108         struct cifs_fid fid;
1109         struct smb2_err_rsp *err_buf = NULL;
1110         struct smb2_symlink_err_rsp *symlink;
1111         unsigned int sub_len;
1112         unsigned int sub_offset;
1113         unsigned int print_len;
1114         unsigned int print_offset;
1115
1116         cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
1117
1118         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
1119         if (!utf16_path)
1120                 return -ENOMEM;
1121
1122         oparms.tcon = tcon;
1123         oparms.desired_access = FILE_READ_ATTRIBUTES;
1124         oparms.disposition = FILE_OPEN;
1125         oparms.create_options = 0;
1126         oparms.fid = &fid;
1127         oparms.reconnect = false;
1128
1129         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, &err_buf);
1130
1131         if (!rc || !err_buf) {
1132                 kfree(utf16_path);
1133                 return -ENOENT;
1134         }
1135
1136         if (le32_to_cpu(err_buf->ByteCount) < sizeof(struct smb2_symlink_err_rsp) ||
1137             get_rfc1002_length(err_buf) + 4 < SMB2_SYMLINK_STRUCT_SIZE) {
1138                 kfree(utf16_path);
1139                 return -ENOENT;
1140         }
1141
1142         /* open must fail on symlink - reset rc */
1143         rc = 0;
1144         symlink = (struct smb2_symlink_err_rsp *)err_buf->ErrorData;
1145         sub_len = le16_to_cpu(symlink->SubstituteNameLength);
1146         sub_offset = le16_to_cpu(symlink->SubstituteNameOffset);
1147         print_len = le16_to_cpu(symlink->PrintNameLength);
1148         print_offset = le16_to_cpu(symlink->PrintNameOffset);
1149
1150         if (get_rfc1002_length(err_buf) + 4 <
1151                         SMB2_SYMLINK_STRUCT_SIZE + sub_offset + sub_len) {
1152                 kfree(utf16_path);
1153                 return -ENOENT;
1154         }
1155
1156         if (get_rfc1002_length(err_buf) + 4 <
1157                         SMB2_SYMLINK_STRUCT_SIZE + print_offset + print_len) {
1158                 kfree(utf16_path);
1159                 return -ENOENT;
1160         }
1161
1162         *target_path = cifs_strndup_from_utf16(
1163                                 (char *)symlink->PathBuffer + sub_offset,
1164                                 sub_len, true, cifs_sb->local_nls);
1165         if (!(*target_path)) {
1166                 kfree(utf16_path);
1167                 return -ENOMEM;
1168         }
1169         convert_delimiter(*target_path, '/');
1170         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
1171         kfree(utf16_path);
1172         return rc;
1173 }
1174
1175 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
1176                             loff_t offset, loff_t len, bool keep_size)
1177 {
1178         struct inode *inode;
1179         struct cifsInodeInfo *cifsi;
1180         struct cifsFileInfo *cfile = file->private_data;
1181         struct file_zero_data_information fsctl_buf;
1182         long rc;
1183         unsigned int xid;
1184
1185         xid = get_xid();
1186
1187         inode = d_inode(cfile->dentry);
1188         cifsi = CIFS_I(inode);
1189
1190         /* if file not oplocked can't be sure whether asking to extend size */
1191         if (!CIFS_CACHE_READ(cifsi))
1192                 if (keep_size == false)
1193                         return -EOPNOTSUPP;
1194
1195         /*
1196          * Must check if file sparse since fallocate -z (zero range) assumes
1197          * non-sparse allocation
1198          */
1199         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE))
1200                 return -EOPNOTSUPP;
1201
1202         /*
1203          * need to make sure we are not asked to extend the file since the SMB3
1204          * fsctl does not change the file size. In the future we could change
1205          * this to zero the first part of the range then set the file size
1206          * which for a non sparse file would zero the newly extended range
1207          */
1208         if (keep_size == false)
1209                 if (i_size_read(inode) < offset + len)
1210                         return -EOPNOTSUPP;
1211
1212         cifs_dbg(FYI, "offset %lld len %lld", offset, len);
1213
1214         fsctl_buf.FileOffset = cpu_to_le64(offset);
1215         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
1216
1217         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1218                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
1219                         true /* is_fctl */, (char *)&fsctl_buf,
1220                         sizeof(struct file_zero_data_information), NULL, NULL);
1221         free_xid(xid);
1222         return rc;
1223 }
1224
1225 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
1226                             loff_t offset, loff_t len)
1227 {
1228         struct inode *inode;
1229         struct cifsInodeInfo *cifsi;
1230         struct cifsFileInfo *cfile = file->private_data;
1231         struct file_zero_data_information fsctl_buf;
1232         long rc;
1233         unsigned int xid;
1234         __u8 set_sparse = 1;
1235
1236         xid = get_xid();
1237
1238         inode = d_inode(cfile->dentry);
1239         cifsi = CIFS_I(inode);
1240
1241         /* Need to make file sparse, if not already, before freeing range. */
1242         /* Consider adding equivalent for compressed since it could also work */
1243         if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse))
1244                 return -EOPNOTSUPP;
1245
1246         cifs_dbg(FYI, "offset %lld len %lld", offset, len);
1247
1248         fsctl_buf.FileOffset = cpu_to_le64(offset);
1249         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
1250
1251         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1252                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
1253                         true /* is_fctl */, (char *)&fsctl_buf,
1254                         sizeof(struct file_zero_data_information), NULL, NULL);
1255         free_xid(xid);
1256         return rc;
1257 }
1258
1259 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
1260                             loff_t off, loff_t len, bool keep_size)
1261 {
1262         struct inode *inode;
1263         struct cifsInodeInfo *cifsi;
1264         struct cifsFileInfo *cfile = file->private_data;
1265         long rc = -EOPNOTSUPP;
1266         unsigned int xid;
1267
1268         xid = get_xid();
1269
1270         inode = d_inode(cfile->dentry);
1271         cifsi = CIFS_I(inode);
1272
1273         /* if file not oplocked can't be sure whether asking to extend size */
1274         if (!CIFS_CACHE_READ(cifsi))
1275                 if (keep_size == false)
1276                         return -EOPNOTSUPP;
1277
1278         /*
1279          * Files are non-sparse by default so falloc may be a no-op
1280          * Must check if file sparse. If not sparse, and not extending
1281          * then no need to do anything since file already allocated
1282          */
1283         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
1284                 if (keep_size == true)
1285                         return 0;
1286                 /* check if extending file */
1287                 else if (i_size_read(inode) >= off + len)
1288                         /* not extending file and already not sparse */
1289                         return 0;
1290                 /* BB: in future add else clause to extend file */
1291                 else
1292                         return -EOPNOTSUPP;
1293         }
1294
1295         if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
1296                 /*
1297                  * Check if falloc starts within first few pages of file
1298                  * and ends within a few pages of the end of file to
1299                  * ensure that most of file is being forced to be
1300                  * fallocated now. If so then setting whole file sparse
1301                  * ie potentially making a few extra pages at the beginning
1302                  * or end of the file non-sparse via set_sparse is harmless.
1303                  */
1304                 if ((off > 8192) || (off + len + 8192 < i_size_read(inode)))
1305                         return -EOPNOTSUPP;
1306
1307                 rc = smb2_set_sparse(xid, tcon, cfile, inode, false);
1308         }
1309         /* BB: else ... in future add code to extend file and set sparse */
1310
1311
1312         free_xid(xid);
1313         return rc;
1314 }
1315
1316
1317 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
1318                            loff_t off, loff_t len)
1319 {
1320         /* KEEP_SIZE already checked for by do_fallocate */
1321         if (mode & FALLOC_FL_PUNCH_HOLE)
1322                 return smb3_punch_hole(file, tcon, off, len);
1323         else if (mode & FALLOC_FL_ZERO_RANGE) {
1324                 if (mode & FALLOC_FL_KEEP_SIZE)
1325                         return smb3_zero_range(file, tcon, off, len, true);
1326                 return smb3_zero_range(file, tcon, off, len, false);
1327         } else if (mode == FALLOC_FL_KEEP_SIZE)
1328                 return smb3_simple_falloc(file, tcon, off, len, true);
1329         else if (mode == 0)
1330                 return smb3_simple_falloc(file, tcon, off, len, false);
1331
1332         return -EOPNOTSUPP;
1333 }
1334
1335 static void
1336 smb2_downgrade_oplock(struct TCP_Server_Info *server,
1337                         struct cifsInodeInfo *cinode, bool set_level2)
1338 {
1339         if (set_level2)
1340                 server->ops->set_oplock_level(cinode, SMB2_OPLOCK_LEVEL_II,
1341                                                 0, NULL);
1342         else
1343                 server->ops->set_oplock_level(cinode, 0, 0, NULL);
1344 }
1345
1346 static void
1347 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1348                       unsigned int epoch, bool *purge_cache)
1349 {
1350         oplock &= 0xFF;
1351         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
1352                 return;
1353         if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
1354                 cinode->oplock = CIFS_CACHE_RHW_FLG;
1355                 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
1356                          &cinode->vfs_inode);
1357         } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
1358                 cinode->oplock = CIFS_CACHE_RW_FLG;
1359                 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
1360                          &cinode->vfs_inode);
1361         } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
1362                 cinode->oplock = CIFS_CACHE_READ_FLG;
1363                 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
1364                          &cinode->vfs_inode);
1365         } else
1366                 cinode->oplock = 0;
1367 }
1368
1369 static void
1370 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1371                        unsigned int epoch, bool *purge_cache)
1372 {
1373         char message[5] = {0};
1374
1375         oplock &= 0xFF;
1376         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
1377                 return;
1378
1379         cinode->oplock = 0;
1380         if (oplock & SMB2_LEASE_READ_CACHING_HE) {
1381                 cinode->oplock |= CIFS_CACHE_READ_FLG;
1382                 strcat(message, "R");
1383         }
1384         if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
1385                 cinode->oplock |= CIFS_CACHE_HANDLE_FLG;
1386                 strcat(message, "H");
1387         }
1388         if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
1389                 cinode->oplock |= CIFS_CACHE_WRITE_FLG;
1390                 strcat(message, "W");
1391         }
1392         if (!cinode->oplock)
1393                 strcat(message, "None");
1394         cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
1395                  &cinode->vfs_inode);
1396 }
1397
1398 static void
1399 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1400                       unsigned int epoch, bool *purge_cache)
1401 {
1402         unsigned int old_oplock = cinode->oplock;
1403
1404         smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
1405
1406         if (purge_cache) {
1407                 *purge_cache = false;
1408                 if (old_oplock == CIFS_CACHE_READ_FLG) {
1409                         if (cinode->oplock == CIFS_CACHE_READ_FLG &&
1410                             (epoch - cinode->epoch > 0))
1411                                 *purge_cache = true;
1412                         else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
1413                                  (epoch - cinode->epoch > 1))
1414                                 *purge_cache = true;
1415                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
1416                                  (epoch - cinode->epoch > 1))
1417                                 *purge_cache = true;
1418                         else if (cinode->oplock == 0 &&
1419                                  (epoch - cinode->epoch > 0))
1420                                 *purge_cache = true;
1421                 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
1422                         if (cinode->oplock == CIFS_CACHE_RH_FLG &&
1423                             (epoch - cinode->epoch > 0))
1424                                 *purge_cache = true;
1425                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
1426                                  (epoch - cinode->epoch > 1))
1427                                 *purge_cache = true;
1428                 }
1429                 cinode->epoch = epoch;
1430         }
1431 }
1432
1433 static bool
1434 smb2_is_read_op(__u32 oplock)
1435 {
1436         return oplock == SMB2_OPLOCK_LEVEL_II;
1437 }
1438
1439 static bool
1440 smb21_is_read_op(__u32 oplock)
1441 {
1442         return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
1443                !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
1444 }
1445
1446 static __le32
1447 map_oplock_to_lease(u8 oplock)
1448 {
1449         if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
1450                 return SMB2_LEASE_WRITE_CACHING | SMB2_LEASE_READ_CACHING;
1451         else if (oplock == SMB2_OPLOCK_LEVEL_II)
1452                 return SMB2_LEASE_READ_CACHING;
1453         else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
1454                 return SMB2_LEASE_HANDLE_CACHING | SMB2_LEASE_READ_CACHING |
1455                        SMB2_LEASE_WRITE_CACHING;
1456         return 0;
1457 }
1458
1459 static char *
1460 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
1461 {
1462         struct create_lease *buf;
1463
1464         buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
1465         if (!buf)
1466                 return NULL;
1467
1468         buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
1469         buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
1470         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
1471
1472         buf->ccontext.DataOffset = cpu_to_le16(offsetof
1473                                         (struct create_lease, lcontext));
1474         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
1475         buf->ccontext.NameOffset = cpu_to_le16(offsetof
1476                                 (struct create_lease, Name));
1477         buf->ccontext.NameLength = cpu_to_le16(4);
1478         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
1479         buf->Name[0] = 'R';
1480         buf->Name[1] = 'q';
1481         buf->Name[2] = 'L';
1482         buf->Name[3] = 's';
1483         return (char *)buf;
1484 }
1485
1486 static char *
1487 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
1488 {
1489         struct create_lease_v2 *buf;
1490
1491         buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
1492         if (!buf)
1493                 return NULL;
1494
1495         buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
1496         buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
1497         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
1498
1499         buf->ccontext.DataOffset = cpu_to_le16(offsetof
1500                                         (struct create_lease_v2, lcontext));
1501         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
1502         buf->ccontext.NameOffset = cpu_to_le16(offsetof
1503                                 (struct create_lease_v2, Name));
1504         buf->ccontext.NameLength = cpu_to_le16(4);
1505         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
1506         buf->Name[0] = 'R';
1507         buf->Name[1] = 'q';
1508         buf->Name[2] = 'L';
1509         buf->Name[3] = 's';
1510         return (char *)buf;
1511 }
1512
1513 static __u8
1514 smb2_parse_lease_buf(void *buf, unsigned int *epoch)
1515 {
1516         struct create_lease *lc = (struct create_lease *)buf;
1517
1518         *epoch = 0; /* not used */
1519         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
1520                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
1521         return le32_to_cpu(lc->lcontext.LeaseState);
1522 }
1523
1524 static __u8
1525 smb3_parse_lease_buf(void *buf, unsigned int *epoch)
1526 {
1527         struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
1528
1529         *epoch = le16_to_cpu(lc->lcontext.Epoch);
1530         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
1531                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
1532         return le32_to_cpu(lc->lcontext.LeaseState);
1533 }
1534
1535 static unsigned int
1536 smb2_wp_retry_size(struct inode *inode)
1537 {
1538         return min_t(unsigned int, CIFS_SB(inode->i_sb)->wsize,
1539                      SMB2_MAX_BUFFER_SIZE);
1540 }
1541
1542 static bool
1543 smb2_dir_needs_close(struct cifsFileInfo *cfile)
1544 {
1545         return !cfile->invalidHandle;
1546 }
1547
1548 struct smb_version_operations smb20_operations = {
1549         .compare_fids = smb2_compare_fids,
1550         .setup_request = smb2_setup_request,
1551         .setup_async_request = smb2_setup_async_request,
1552         .check_receive = smb2_check_receive,
1553         .add_credits = smb2_add_credits,
1554         .set_credits = smb2_set_credits,
1555         .get_credits_field = smb2_get_credits_field,
1556         .get_credits = smb2_get_credits,
1557         .wait_mtu_credits = cifs_wait_mtu_credits,
1558         .get_next_mid = smb2_get_next_mid,
1559         .read_data_offset = smb2_read_data_offset,
1560         .read_data_length = smb2_read_data_length,
1561         .map_error = map_smb2_to_linux_error,
1562         .find_mid = smb2_find_mid,
1563         .check_message = smb2_check_message,
1564         .dump_detail = smb2_dump_detail,
1565         .clear_stats = smb2_clear_stats,
1566         .print_stats = smb2_print_stats,
1567         .is_oplock_break = smb2_is_valid_oplock_break,
1568         .downgrade_oplock = smb2_downgrade_oplock,
1569         .need_neg = smb2_need_neg,
1570         .negotiate = smb2_negotiate,
1571         .negotiate_wsize = smb2_negotiate_wsize,
1572         .negotiate_rsize = smb2_negotiate_rsize,
1573         .sess_setup = SMB2_sess_setup,
1574         .logoff = SMB2_logoff,
1575         .tree_connect = SMB2_tcon,
1576         .tree_disconnect = SMB2_tdis,
1577         .qfs_tcon = smb2_qfs_tcon,
1578         .is_path_accessible = smb2_is_path_accessible,
1579         .can_echo = smb2_can_echo,
1580         .echo = SMB2_echo,
1581         .query_path_info = smb2_query_path_info,
1582         .get_srv_inum = smb2_get_srv_inum,
1583         .query_file_info = smb2_query_file_info,
1584         .set_path_size = smb2_set_path_size,
1585         .set_file_size = smb2_set_file_size,
1586         .set_file_info = smb2_set_file_info,
1587         .set_compression = smb2_set_compression,
1588         .mkdir = smb2_mkdir,
1589         .mkdir_setinfo = smb2_mkdir_setinfo,
1590         .rmdir = smb2_rmdir,
1591         .unlink = smb2_unlink,
1592         .rename = smb2_rename_path,
1593         .create_hardlink = smb2_create_hardlink,
1594         .query_symlink = smb2_query_symlink,
1595         .query_mf_symlink = smb3_query_mf_symlink,
1596         .create_mf_symlink = smb3_create_mf_symlink,
1597         .open = smb2_open_file,
1598         .set_fid = smb2_set_fid,
1599         .close = smb2_close_file,
1600         .flush = smb2_flush_file,
1601         .async_readv = smb2_async_readv,
1602         .async_writev = smb2_async_writev,
1603         .sync_read = smb2_sync_read,
1604         .sync_write = smb2_sync_write,
1605         .query_dir_first = smb2_query_dir_first,
1606         .query_dir_next = smb2_query_dir_next,
1607         .close_dir = smb2_close_dir,
1608         .calc_smb_size = smb2_calc_size,
1609         .is_status_pending = smb2_is_status_pending,
1610         .oplock_response = smb2_oplock_response,
1611         .queryfs = smb2_queryfs,
1612         .mand_lock = smb2_mand_lock,
1613         .mand_unlock_range = smb2_unlock_range,
1614         .push_mand_locks = smb2_push_mandatory_locks,
1615         .get_lease_key = smb2_get_lease_key,
1616         .set_lease_key = smb2_set_lease_key,
1617         .new_lease_key = smb2_new_lease_key,
1618         .calc_signature = smb2_calc_signature,
1619         .is_read_op = smb2_is_read_op,
1620         .set_oplock_level = smb2_set_oplock_level,
1621         .create_lease_buf = smb2_create_lease_buf,
1622         .parse_lease_buf = smb2_parse_lease_buf,
1623         .clone_range = smb2_clone_range,
1624         .wp_retry_size = smb2_wp_retry_size,
1625         .dir_needs_close = smb2_dir_needs_close,
1626 };
1627
1628 struct smb_version_operations smb21_operations = {
1629         .compare_fids = smb2_compare_fids,
1630         .setup_request = smb2_setup_request,
1631         .setup_async_request = smb2_setup_async_request,
1632         .check_receive = smb2_check_receive,
1633         .add_credits = smb2_add_credits,
1634         .set_credits = smb2_set_credits,
1635         .get_credits_field = smb2_get_credits_field,
1636         .get_credits = smb2_get_credits,
1637         .wait_mtu_credits = smb2_wait_mtu_credits,
1638         .get_next_mid = smb2_get_next_mid,
1639         .read_data_offset = smb2_read_data_offset,
1640         .read_data_length = smb2_read_data_length,
1641         .map_error = map_smb2_to_linux_error,
1642         .find_mid = smb2_find_mid,
1643         .check_message = smb2_check_message,
1644         .dump_detail = smb2_dump_detail,
1645         .clear_stats = smb2_clear_stats,
1646         .print_stats = smb2_print_stats,
1647         .is_oplock_break = smb2_is_valid_oplock_break,
1648         .downgrade_oplock = smb2_downgrade_oplock,
1649         .need_neg = smb2_need_neg,
1650         .negotiate = smb2_negotiate,
1651         .negotiate_wsize = smb2_negotiate_wsize,
1652         .negotiate_rsize = smb2_negotiate_rsize,
1653         .sess_setup = SMB2_sess_setup,
1654         .logoff = SMB2_logoff,
1655         .tree_connect = SMB2_tcon,
1656         .tree_disconnect = SMB2_tdis,
1657         .qfs_tcon = smb2_qfs_tcon,
1658         .is_path_accessible = smb2_is_path_accessible,
1659         .can_echo = smb2_can_echo,
1660         .echo = SMB2_echo,
1661         .query_path_info = smb2_query_path_info,
1662         .get_srv_inum = smb2_get_srv_inum,
1663         .query_file_info = smb2_query_file_info,
1664         .set_path_size = smb2_set_path_size,
1665         .set_file_size = smb2_set_file_size,
1666         .set_file_info = smb2_set_file_info,
1667         .set_compression = smb2_set_compression,
1668         .mkdir = smb2_mkdir,
1669         .mkdir_setinfo = smb2_mkdir_setinfo,
1670         .rmdir = smb2_rmdir,
1671         .unlink = smb2_unlink,
1672         .rename = smb2_rename_path,
1673         .create_hardlink = smb2_create_hardlink,
1674         .query_symlink = smb2_query_symlink,
1675         .query_mf_symlink = smb3_query_mf_symlink,
1676         .create_mf_symlink = smb3_create_mf_symlink,
1677         .open = smb2_open_file,
1678         .set_fid = smb2_set_fid,
1679         .close = smb2_close_file,
1680         .flush = smb2_flush_file,
1681         .async_readv = smb2_async_readv,
1682         .async_writev = smb2_async_writev,
1683         .sync_read = smb2_sync_read,
1684         .sync_write = smb2_sync_write,
1685         .query_dir_first = smb2_query_dir_first,
1686         .query_dir_next = smb2_query_dir_next,
1687         .close_dir = smb2_close_dir,
1688         .calc_smb_size = smb2_calc_size,
1689         .is_status_pending = smb2_is_status_pending,
1690         .oplock_response = smb2_oplock_response,
1691         .queryfs = smb2_queryfs,
1692         .mand_lock = smb2_mand_lock,
1693         .mand_unlock_range = smb2_unlock_range,
1694         .push_mand_locks = smb2_push_mandatory_locks,
1695         .get_lease_key = smb2_get_lease_key,
1696         .set_lease_key = smb2_set_lease_key,
1697         .new_lease_key = smb2_new_lease_key,
1698         .calc_signature = smb2_calc_signature,
1699         .is_read_op = smb21_is_read_op,
1700         .set_oplock_level = smb21_set_oplock_level,
1701         .create_lease_buf = smb2_create_lease_buf,
1702         .parse_lease_buf = smb2_parse_lease_buf,
1703         .clone_range = smb2_clone_range,
1704         .wp_retry_size = smb2_wp_retry_size,
1705         .dir_needs_close = smb2_dir_needs_close,
1706         .enum_snapshots = smb3_enum_snapshots,
1707 };
1708
1709 struct smb_version_operations smb30_operations = {
1710         .compare_fids = smb2_compare_fids,
1711         .setup_request = smb2_setup_request,
1712         .setup_async_request = smb2_setup_async_request,
1713         .check_receive = smb2_check_receive,
1714         .add_credits = smb2_add_credits,
1715         .set_credits = smb2_set_credits,
1716         .get_credits_field = smb2_get_credits_field,
1717         .get_credits = smb2_get_credits,
1718         .wait_mtu_credits = smb2_wait_mtu_credits,
1719         .get_next_mid = smb2_get_next_mid,
1720         .read_data_offset = smb2_read_data_offset,
1721         .read_data_length = smb2_read_data_length,
1722         .map_error = map_smb2_to_linux_error,
1723         .find_mid = smb2_find_mid,
1724         .check_message = smb2_check_message,
1725         .dump_detail = smb2_dump_detail,
1726         .clear_stats = smb2_clear_stats,
1727         .print_stats = smb2_print_stats,
1728         .dump_share_caps = smb2_dump_share_caps,
1729         .is_oplock_break = smb2_is_valid_oplock_break,
1730         .downgrade_oplock = smb2_downgrade_oplock,
1731         .need_neg = smb2_need_neg,
1732         .negotiate = smb2_negotiate,
1733         .negotiate_wsize = smb2_negotiate_wsize,
1734         .negotiate_rsize = smb2_negotiate_rsize,
1735         .sess_setup = SMB2_sess_setup,
1736         .logoff = SMB2_logoff,
1737         .tree_connect = SMB2_tcon,
1738         .tree_disconnect = SMB2_tdis,
1739         .qfs_tcon = smb3_qfs_tcon,
1740         .is_path_accessible = smb2_is_path_accessible,
1741         .can_echo = smb2_can_echo,
1742         .echo = SMB2_echo,
1743         .query_path_info = smb2_query_path_info,
1744         .get_srv_inum = smb2_get_srv_inum,
1745         .query_file_info = smb2_query_file_info,
1746         .set_path_size = smb2_set_path_size,
1747         .set_file_size = smb2_set_file_size,
1748         .set_file_info = smb2_set_file_info,
1749         .set_compression = smb2_set_compression,
1750         .mkdir = smb2_mkdir,
1751         .mkdir_setinfo = smb2_mkdir_setinfo,
1752         .rmdir = smb2_rmdir,
1753         .unlink = smb2_unlink,
1754         .rename = smb2_rename_path,
1755         .create_hardlink = smb2_create_hardlink,
1756         .query_symlink = smb2_query_symlink,
1757         .query_mf_symlink = smb3_query_mf_symlink,
1758         .create_mf_symlink = smb3_create_mf_symlink,
1759         .open = smb2_open_file,
1760         .set_fid = smb2_set_fid,
1761         .close = smb2_close_file,
1762         .flush = smb2_flush_file,
1763         .async_readv = smb2_async_readv,
1764         .async_writev = smb2_async_writev,
1765         .sync_read = smb2_sync_read,
1766         .sync_write = smb2_sync_write,
1767         .query_dir_first = smb2_query_dir_first,
1768         .query_dir_next = smb2_query_dir_next,
1769         .close_dir = smb2_close_dir,
1770         .calc_smb_size = smb2_calc_size,
1771         .is_status_pending = smb2_is_status_pending,
1772         .oplock_response = smb2_oplock_response,
1773         .queryfs = smb2_queryfs,
1774         .mand_lock = smb2_mand_lock,
1775         .mand_unlock_range = smb2_unlock_range,
1776         .push_mand_locks = smb2_push_mandatory_locks,
1777         .get_lease_key = smb2_get_lease_key,
1778         .set_lease_key = smb2_set_lease_key,
1779         .new_lease_key = smb2_new_lease_key,
1780         .generate_signingkey = generate_smb30signingkey,
1781         .calc_signature = smb3_calc_signature,
1782         .set_integrity  = smb3_set_integrity,
1783         .is_read_op = smb21_is_read_op,
1784         .set_oplock_level = smb3_set_oplock_level,
1785         .create_lease_buf = smb3_create_lease_buf,
1786         .parse_lease_buf = smb3_parse_lease_buf,
1787         .clone_range = smb2_clone_range,
1788         .duplicate_extents = smb2_duplicate_extents,
1789         .validate_negotiate = smb3_validate_negotiate,
1790         .wp_retry_size = smb2_wp_retry_size,
1791         .dir_needs_close = smb2_dir_needs_close,
1792         .fallocate = smb3_fallocate,
1793         .enum_snapshots = smb3_enum_snapshots,
1794 };
1795
1796 #ifdef CONFIG_CIFS_SMB311
1797 struct smb_version_operations smb311_operations = {
1798         .compare_fids = smb2_compare_fids,
1799         .setup_request = smb2_setup_request,
1800         .setup_async_request = smb2_setup_async_request,
1801         .check_receive = smb2_check_receive,
1802         .add_credits = smb2_add_credits,
1803         .set_credits = smb2_set_credits,
1804         .get_credits_field = smb2_get_credits_field,
1805         .get_credits = smb2_get_credits,
1806         .wait_mtu_credits = smb2_wait_mtu_credits,
1807         .get_next_mid = smb2_get_next_mid,
1808         .read_data_offset = smb2_read_data_offset,
1809         .read_data_length = smb2_read_data_length,
1810         .map_error = map_smb2_to_linux_error,
1811         .find_mid = smb2_find_mid,
1812         .check_message = smb2_check_message,
1813         .dump_detail = smb2_dump_detail,
1814         .clear_stats = smb2_clear_stats,
1815         .print_stats = smb2_print_stats,
1816         .dump_share_caps = smb2_dump_share_caps,
1817         .is_oplock_break = smb2_is_valid_oplock_break,
1818         .downgrade_oplock = smb2_downgrade_oplock,
1819         .need_neg = smb2_need_neg,
1820         .negotiate = smb2_negotiate,
1821         .negotiate_wsize = smb2_negotiate_wsize,
1822         .negotiate_rsize = smb2_negotiate_rsize,
1823         .sess_setup = SMB2_sess_setup,
1824         .logoff = SMB2_logoff,
1825         .tree_connect = SMB2_tcon,
1826         .tree_disconnect = SMB2_tdis,
1827         .qfs_tcon = smb3_qfs_tcon,
1828         .is_path_accessible = smb2_is_path_accessible,
1829         .can_echo = smb2_can_echo,
1830         .echo = SMB2_echo,
1831         .query_path_info = smb2_query_path_info,
1832         .get_srv_inum = smb2_get_srv_inum,
1833         .query_file_info = smb2_query_file_info,
1834         .set_path_size = smb2_set_path_size,
1835         .set_file_size = smb2_set_file_size,
1836         .set_file_info = smb2_set_file_info,
1837         .set_compression = smb2_set_compression,
1838         .mkdir = smb2_mkdir,
1839         .mkdir_setinfo = smb2_mkdir_setinfo,
1840         .rmdir = smb2_rmdir,
1841         .unlink = smb2_unlink,
1842         .rename = smb2_rename_path,
1843         .create_hardlink = smb2_create_hardlink,
1844         .query_symlink = smb2_query_symlink,
1845         .query_mf_symlink = smb3_query_mf_symlink,
1846         .create_mf_symlink = smb3_create_mf_symlink,
1847         .open = smb2_open_file,
1848         .set_fid = smb2_set_fid,
1849         .close = smb2_close_file,
1850         .flush = smb2_flush_file,
1851         .async_readv = smb2_async_readv,
1852         .async_writev = smb2_async_writev,
1853         .sync_read = smb2_sync_read,
1854         .sync_write = smb2_sync_write,
1855         .query_dir_first = smb2_query_dir_first,
1856         .query_dir_next = smb2_query_dir_next,
1857         .close_dir = smb2_close_dir,
1858         .calc_smb_size = smb2_calc_size,
1859         .is_status_pending = smb2_is_status_pending,
1860         .oplock_response = smb2_oplock_response,
1861         .queryfs = smb2_queryfs,
1862         .mand_lock = smb2_mand_lock,
1863         .mand_unlock_range = smb2_unlock_range,
1864         .push_mand_locks = smb2_push_mandatory_locks,
1865         .get_lease_key = smb2_get_lease_key,
1866         .set_lease_key = smb2_set_lease_key,
1867         .new_lease_key = smb2_new_lease_key,
1868         .generate_signingkey = generate_smb311signingkey,
1869         .calc_signature = smb3_calc_signature,
1870         .set_integrity  = smb3_set_integrity,
1871         .is_read_op = smb21_is_read_op,
1872         .set_oplock_level = smb3_set_oplock_level,
1873         .create_lease_buf = smb3_create_lease_buf,
1874         .parse_lease_buf = smb3_parse_lease_buf,
1875         .clone_range = smb2_clone_range,
1876         .duplicate_extents = smb2_duplicate_extents,
1877 /*      .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
1878         .wp_retry_size = smb2_wp_retry_size,
1879         .dir_needs_close = smb2_dir_needs_close,
1880         .fallocate = smb3_fallocate,
1881         .enum_snapshots = smb3_enum_snapshots,
1882 };
1883 #endif /* CIFS_SMB311 */
1884
1885 struct smb_version_values smb20_values = {
1886         .version_string = SMB20_VERSION_STRING,
1887         .protocol_id = SMB20_PROT_ID,
1888         .req_capabilities = 0, /* MBZ */
1889         .large_lock_type = 0,
1890         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1891         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1892         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1893         .header_size = sizeof(struct smb2_hdr),
1894         .max_header_size = MAX_SMB2_HDR_SIZE,
1895         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1896         .lock_cmd = SMB2_LOCK,
1897         .cap_unix = 0,
1898         .cap_nt_find = SMB2_NT_FIND,
1899         .cap_large_files = SMB2_LARGE_FILES,
1900         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1901         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1902         .create_lease_size = sizeof(struct create_lease),
1903 };
1904
1905 struct smb_version_values smb21_values = {
1906         .version_string = SMB21_VERSION_STRING,
1907         .protocol_id = SMB21_PROT_ID,
1908         .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
1909         .large_lock_type = 0,
1910         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1911         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1912         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1913         .header_size = sizeof(struct smb2_hdr),
1914         .max_header_size = MAX_SMB2_HDR_SIZE,
1915         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1916         .lock_cmd = SMB2_LOCK,
1917         .cap_unix = 0,
1918         .cap_nt_find = SMB2_NT_FIND,
1919         .cap_large_files = SMB2_LARGE_FILES,
1920         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1921         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1922         .create_lease_size = sizeof(struct create_lease),
1923 };
1924
1925 struct smb_version_values smb30_values = {
1926         .version_string = SMB30_VERSION_STRING,
1927         .protocol_id = SMB30_PROT_ID,
1928         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
1929         .large_lock_type = 0,
1930         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1931         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1932         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1933         .header_size = sizeof(struct smb2_hdr),
1934         .max_header_size = MAX_SMB2_HDR_SIZE,
1935         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1936         .lock_cmd = SMB2_LOCK,
1937         .cap_unix = 0,
1938         .cap_nt_find = SMB2_NT_FIND,
1939         .cap_large_files = SMB2_LARGE_FILES,
1940         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1941         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1942         .create_lease_size = sizeof(struct create_lease_v2),
1943 };
1944
1945 struct smb_version_values smb302_values = {
1946         .version_string = SMB302_VERSION_STRING,
1947         .protocol_id = SMB302_PROT_ID,
1948         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
1949         .large_lock_type = 0,
1950         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1951         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1952         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1953         .header_size = sizeof(struct smb2_hdr),
1954         .max_header_size = MAX_SMB2_HDR_SIZE,
1955         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1956         .lock_cmd = SMB2_LOCK,
1957         .cap_unix = 0,
1958         .cap_nt_find = SMB2_NT_FIND,
1959         .cap_large_files = SMB2_LARGE_FILES,
1960         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1961         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1962         .create_lease_size = sizeof(struct create_lease_v2),
1963 };
1964
1965 #ifdef CONFIG_CIFS_SMB311
1966 struct smb_version_values smb311_values = {
1967         .version_string = SMB311_VERSION_STRING,
1968         .protocol_id = SMB311_PROT_ID,
1969         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES,
1970         .large_lock_type = 0,
1971         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1972         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1973         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1974         .header_size = sizeof(struct smb2_hdr),
1975         .max_header_size = MAX_SMB2_HDR_SIZE,
1976         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1977         .lock_cmd = SMB2_LOCK,
1978         .cap_unix = 0,
1979         .cap_nt_find = SMB2_NT_FIND,
1980         .cap_large_files = SMB2_LARGE_FILES,
1981         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1982         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1983         .create_lease_size = sizeof(struct create_lease_v2),
1984 };
1985 #endif /* SMB311 */