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 <= 8) {
 152                                 *num = SMB2_MAX_BUFFER_SIZE;
 153                                 *credits = 0;
 154                                 break;
 155                         }
 156
 157                         /* leave some credits for reopen and other ops */
 158                         scredits -= 8;
 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                 kfree(retbuf);
 633                 retbuf = NULL;
 634                 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
 635                         trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
 636                         true /* is_fsctl */, (char *)pcchunk,
 637                         sizeof(struct copychunk_ioctl), (char **)&retbuf,
 638                         &ret_data_len);
 639                 if (rc == 0) {
 640                         if (ret_data_len !=
 641                                         sizeof(struct copychunk_ioctl_rsp)) {
 642                                 cifs_dbg(VFS, "invalid cchunk response size\n");
 643                                 rc = -EIO;
 644                                 goto cchunk_out;
 645                         }
 646                         if (retbuf->TotalBytesWritten == 0) {
 647                                 cifs_dbg(FYI, "no bytes copied\n");
 648                                 rc = -EIO;
 649                                 goto cchunk_out;
 650                         }
 651                         /*
 652                          * Check if server claimed to write more than we asked
 653                          */
 654                         if (le32_to_cpu(retbuf->TotalBytesWritten) >
 655                             le32_to_cpu(pcchunk->Length)) {
 656                                 cifs_dbg(VFS, "invalid copy chunk response\n");
 657                                 rc = -EIO;
 658                                 goto cchunk_out;
 659                         }
 660                         if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
 661                                 cifs_dbg(VFS, "invalid num chunks written\n");
 662                                 rc = -EIO;
 663                                 goto cchunk_out;
 664                         }
 665                         chunks_copied++;
 666
 667                         src_off += le32_to_cpu(retbuf->TotalBytesWritten);
 668                         dest_off += le32_to_cpu(retbuf->TotalBytesWritten);
 669                         len -= le32_to_cpu(retbuf->TotalBytesWritten);
 670
 671                         cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %d\n",
 672                                 le32_to_cpu(retbuf->ChunksWritten),
 673                                 le32_to_cpu(retbuf->ChunkBytesWritten),
 674                                 le32_to_cpu(retbuf->TotalBytesWritten));
 675                 } else if (rc == -EINVAL) {
 676                         if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
 677                                 goto cchunk_out;
 678
 679                         cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
 680                                 le32_to_cpu(retbuf->ChunksWritten),
 681                                 le32_to_cpu(retbuf->ChunkBytesWritten),
 682                                 le32_to_cpu(retbuf->TotalBytesWritten));
 683
 684                         /*
 685                          * Check if this is the first request using these sizes,
 686                          * (ie check if copy succeed once with original sizes
 687                          * and check if the server gave us different sizes after
 688                          * we already updated max sizes on previous request).
 689                          * if not then why is the server returning an error now
 690                          */
 691                         if ((chunks_copied != 0) || chunk_sizes_updated)
 692                                 goto cchunk_out;
 693
 694                         /* Check that server is not asking us to grow size */
 695                         if (le32_to_cpu(retbuf->ChunkBytesWritten) <
 696                                         tcon->max_bytes_chunk)
 697                                 tcon->max_bytes_chunk =
 698                                         le32_to_cpu(retbuf->ChunkBytesWritten);
 699                         else
 700                                 goto cchunk_out; /* server gave us bogus size */
 701
 702                         /* No need to change MaxChunks since already set to 1 */
 703                         chunk_sizes_updated = true;
 704                 } else
 705                         goto cchunk_out;
 706         }
 707
 708 cchunk_out:
 709         kfree(pcchunk);
 710         kfree(retbuf);
 711         return rc;
 712 }
 713
 714 static int
 715 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
 716                 struct cifs_fid *fid)
 717 {
 718         return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 719 }
 720
 721 static unsigned int
 722 smb2_read_data_offset(char *buf)
 723 {
 724         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
 725         return rsp->DataOffset;
 726 }
 727
 728 static unsigned int
 729 smb2_read_data_length(char *buf)
 730 {
 731         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
 732         return le32_to_cpu(rsp->DataLength);
 733 }
 734
 735
 736 static int
 737 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,
 738                struct cifs_io_parms *parms, unsigned int *bytes_read,
 739                char **buf, int *buf_type)
 740 {
 741         parms->persistent_fid = pfid->persistent_fid;
 742         parms->volatile_fid = pfid->volatile_fid;
 743         return SMB2_read(xid, parms, bytes_read, buf, buf_type);
 744 }
 745
 746 static int
 747 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,
 748                 struct cifs_io_parms *parms, unsigned int *written,
 749                 struct kvec *iov, unsigned long nr_segs)
 750 {
 751
 752         parms->persistent_fid = pfid->persistent_fid;
 753         parms->volatile_fid = pfid->volatile_fid;
 754         return SMB2_write(xid, parms, written, iov, nr_segs);
 755 }
 756
 757 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
 758 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
 759                 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
 760 {
 761         struct cifsInodeInfo *cifsi;
 762         int rc;
 763
 764         cifsi = CIFS_I(inode);
 765
 766         /* if file already sparse don't bother setting sparse again */
 767         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
 768                 return true; /* already sparse */
 769
 770         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
 771                 return true; /* already not sparse */
 772
 773         /*
 774          * Can't check for sparse support on share the usual way via the
 775          * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
 776          * since Samba server doesn't set the flag on the share, yet
 777          * supports the set sparse FSCTL and returns sparse correctly
 778          * in the file attributes. If we fail setting sparse though we
 779          * mark that server does not support sparse files for this share
 780          * to avoid repeatedly sending the unsupported fsctl to server
 781          * if the file is repeatedly extended.
 782          */
 783         if (tcon->broken_sparse_sup)
 784                 return false;
 785
 786         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
 787                         cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
 788                         true /* is_fctl */, &setsparse, 1, NULL, NULL);
 789         if (rc) {
 790                 tcon->broken_sparse_sup = true;
 791                 cifs_dbg(FYI, "set sparse rc = %d\n", rc);
 792                 return false;
 793         }
 794
 795         if (setsparse)
 796                 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
 797         else
 798                 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
 799
 800         return true;
 801 }
 802
 803 static int
 804 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
 805                    struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
 806 {
 807         __le64 eof = cpu_to_le64(size);
 808         struct inode *inode;
 809
 810         /*
 811          * If extending file more than one page make sparse. Many Linux fs
 812          * make files sparse by default when extending via ftruncate
 813          */
 814         inode = d_inode(cfile->dentry);
 815
 816         if (!set_alloc && (size > inode->i_size + 8192)) {
 817                 __u8 set_sparse = 1;
 818
 819                 /* whether set sparse succeeds or not, extend the file */
 820                 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
 821         }
 822
 823         return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
 824                             cfile->fid.volatile_fid, cfile->pid, &eof, false);
 825 }
 826
 827 static int
 828 smb2_duplicate_extents(const unsigned int xid,
 829                         struct cifsFileInfo *srcfile,
 830                         struct cifsFileInfo *trgtfile, u64 src_off,
 831                         u64 len, u64 dest_off)
 832 {
 833         int rc;
 834         unsigned int ret_data_len;
 835         struct duplicate_extents_to_file dup_ext_buf;
 836         struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink);
 837
 838         /* server fileays advertise duplicate extent support with this flag */
 839         if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) &
 840              FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0)
 841                 return -EOPNOTSUPP;
 842
 843         dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid;
 844         dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid;
 845         dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off);
 846         dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off);
 847         dup_ext_buf.ByteCount = cpu_to_le64(len);
 848         cifs_dbg(FYI, "duplicate extents: src off %lld dst off %lld len %lld",
 849                 src_off, dest_off, len);
 850
 851         rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false);
 852         if (rc)
 853                 goto duplicate_extents_out;
 854
 855         rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
 856                         trgtfile->fid.volatile_fid,
 857                         FSCTL_DUPLICATE_EXTENTS_TO_FILE,
 858                         true /* is_fsctl */, (char *)&dup_ext_buf,
 859                         sizeof(struct duplicate_extents_to_file),
 860                         NULL,
 861                         &ret_data_len);
 862
 863         if (ret_data_len > 0)
 864                 cifs_dbg(FYI, "non-zero response length in duplicate extents");
 865
 866 duplicate_extents_out:
 867         return rc;
 868 }
 869
 870 static int
 871 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
 872                    struct cifsFileInfo *cfile)
 873 {
 874         return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
 875                             cfile->fid.volatile_fid);
 876 }
 877
 878 static int
 879 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
 880                    struct cifsFileInfo *cfile)
 881 {
 882         struct fsctl_set_integrity_information_req integr_info;
 883         unsigned int ret_data_len;
 884
 885         integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED);
 886         integr_info.Flags = 0;
 887         integr_info.Reserved = 0;
 888
 889         return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
 890                         cfile->fid.volatile_fid,
 891                         FSCTL_SET_INTEGRITY_INFORMATION,
 892                         true /* is_fsctl */, (char *)&integr_info,
 893                         sizeof(struct fsctl_set_integrity_information_req),
 894                         NULL,
 895                         &ret_data_len);
 896
 897 }
 898
 899 /* GMT Token is @GMT-YYYY.MM.DD-HH.MM.SS Unicode which is 48 bytes + null */
 900 #define GMT_TOKEN_SIZE 50
 901
 902 /*
 903  * Input buffer contains (empty) struct smb_snapshot array with size filled in
 904  * For output see struct SRV_SNAPSHOT_ARRAY in MS-SMB2 section 2.2.32.2
 905  */
 906 static int
 907 smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon,
 908                    struct cifsFileInfo *cfile, void __user *ioc_buf)
 909 {
 910         char *retbuf = NULL;
 911         unsigned int ret_data_len = 0;
 912         int rc;
 913         struct smb_snapshot_array snapshot_in;
 914
 915         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
 916                         cfile->fid.volatile_fid,
 917                         FSCTL_SRV_ENUMERATE_SNAPSHOTS,
 918                         true /* is_fsctl */, NULL, 0 /* no input data */,
 919                         (char **)&retbuf,
 920                         &ret_data_len);
 921         cifs_dbg(FYI, "enum snaphots ioctl returned %d and ret buflen is %d\n",
 922                         rc, ret_data_len);
 923         if (rc)
 924                 return rc;
 925
 926         if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) {
 927                 /* Fixup buffer */
 928                 if (copy_from_user(&snapshot_in, ioc_buf,
 929                     sizeof(struct smb_snapshot_array))) {
 930                         rc = -EFAULT;
 931                         kfree(retbuf);
 932                         return rc;
 933                 }
 934
 935                 /*
 936                  * Check for min size, ie not large enough to fit even one GMT
 937                  * token (snapshot).  On the first ioctl some users may pass in
 938                  * smaller size (or zero) to simply get the size of the array
 939                  * so the user space caller can allocate sufficient memory
 940                  * and retry the ioctl again with larger array size sufficient
 941                  * to hold all of the snapshot GMT tokens on the second try.
 942                  */
 943                 if (snapshot_in.snapshot_array_size < GMT_TOKEN_SIZE)
 944                         ret_data_len = sizeof(struct smb_snapshot_array);
 945
 946                 /*
 947                  * We return struct SRV_SNAPSHOT_ARRAY, followed by
 948                  * the snapshot array (of 50 byte GMT tokens) each
 949                  * representing an available previous version of the data
 950                  */
 951                 if (ret_data_len > (snapshot_in.snapshot_array_size +
 952                                         sizeof(struct smb_snapshot_array)))
 953                         ret_data_len = snapshot_in.snapshot_array_size +
 954                                         sizeof(struct smb_snapshot_array);
 955
 956                 if (copy_to_user(ioc_buf, retbuf, ret_data_len))
 957                         rc = -EFAULT;
 958         }
 959
 960         kfree(retbuf);
 961         return rc;
 962 }
 963
 964 static int
 965 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
 966                      const char *path, struct cifs_sb_info *cifs_sb,
 967                      struct cifs_fid *fid, __u16 search_flags,
 968                      struct cifs_search_info *srch_inf)
 969 {
 970         __le16 *utf16_path;
 971         int rc;
 972         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 973         struct cifs_open_parms oparms;
 974
 975         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
 976         if (!utf16_path)
 977                 return -ENOMEM;
 978
 979         oparms.tcon = tcon;
 980         oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
 981         oparms.disposition = FILE_OPEN;
 982         oparms.create_options = 0;
 983         oparms.fid = fid;
 984         oparms.reconnect = false;
 985
 986         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
 987         kfree(utf16_path);
 988         if (rc) {
 989                 cifs_dbg(FYI, "open dir failed rc=%d\n", rc);
 990                 return rc;
 991         }
 992
 993         srch_inf->entries_in_buffer = 0;
 994         srch_inf->index_of_last_entry = 2;
 995
 996         rc = SMB2_query_directory(xid, tcon, fid->persistent_fid,
 997                                   fid->volatile_fid, 0, srch_inf);
 998         if (rc) {
 999                 cifs_dbg(FYI, "query directory failed rc=%d\n", rc);
1000                 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1001         }
1002         return rc;
1003 }
1004
1005 static int
1006 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
1007                     struct cifs_fid *fid, __u16 search_flags,
1008                     struct cifs_search_info *srch_inf)
1009 {
1010         return SMB2_query_directory(xid, tcon, fid->persistent_fid,
1011                                     fid->volatile_fid, 0, srch_inf);
1012 }
1013
1014 static int
1015 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
1016                struct cifs_fid *fid)
1017 {
1018         return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1019 }
1020
1021 /*
1022 * If we negotiate SMB2 protocol and get STATUS_PENDING - update
1023 * the number of credits and return true. Otherwise - return false.
1024 */
1025 static bool
1026 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server, int length)
1027 {
1028         struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
1029
1030         if (hdr->Status != STATUS_PENDING)
1031                 return false;
1032
1033         if (!length) {
1034                 spin_lock(&server->req_lock);
1035                 server->credits += le16_to_cpu(hdr->CreditRequest);
1036                 spin_unlock(&server->req_lock);
1037                 wake_up(&server->request_q);
1038         }
1039
1040         return true;
1041 }
1042
1043 static bool
1044 smb2_is_session_expired(char *buf)
1045 {
1046         struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
1047
1048         if (hdr->Status != STATUS_NETWORK_SESSION_EXPIRED)
1049                 return false;
1050
1051         cifs_dbg(FYI, "Session expired\n");
1052         return true;
1053 }
1054
1055 static int
1056 smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
1057                      struct cifsInodeInfo *cinode)
1058 {
1059         if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
1060                 return SMB2_lease_break(0, tcon, cinode->lease_key,
1061                                         smb2_get_lease_state(cinode));
1062
1063         return SMB2_oplock_break(0, tcon, fid->persistent_fid,
1064                                  fid->volatile_fid,
1065                                  CIFS_CACHE_READ(cinode) ? 1 : 0);
1066 }
1067
1068 static int
1069 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
1070              struct kstatfs *buf)
1071 {
1072         int rc;
1073         __le16 srch_path = 0; /* Null - open root of share */
1074         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1075         struct cifs_open_parms oparms;
1076         struct cifs_fid fid;
1077
1078         oparms.tcon = tcon;
1079         oparms.desired_access = FILE_READ_ATTRIBUTES;
1080         oparms.disposition = FILE_OPEN;
1081         oparms.create_options = 0;
1082         oparms.fid = &fid;
1083         oparms.reconnect = false;
1084
1085         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
1086         if (rc)
1087                 return rc;
1088         buf->f_type = SMB2_MAGIC_NUMBER;
1089         rc = SMB2_QFS_info(xid, tcon, fid.persistent_fid, fid.volatile_fid,
1090                            buf);
1091         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
1092         return rc;
1093 }
1094
1095 static bool
1096 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
1097 {
1098         return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
1099                ob1->fid.volatile_fid == ob2->fid.volatile_fid;
1100 }
1101
1102 static int
1103 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
1104                __u64 length, __u32 type, int lock, int unlock, bool wait)
1105 {
1106         if (unlock && !lock)
1107                 type = SMB2_LOCKFLAG_UNLOCK;
1108         return SMB2_lock(xid, tlink_tcon(cfile->tlink),
1109                          cfile->fid.persistent_fid, cfile->fid.volatile_fid,
1110                          current->tgid, length, offset, type, wait);
1111 }
1112
1113 static void
1114 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
1115 {
1116         memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
1117 }
1118
1119 static void
1120 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
1121 {
1122         memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
1123 }
1124
1125 static void
1126 smb2_new_lease_key(struct cifs_fid *fid)
1127 {
1128         generate_random_uuid(fid->lease_key);
1129 }
1130
1131 #define SMB2_SYMLINK_STRUCT_SIZE \
1132         (sizeof(struct smb2_err_rsp) - 1 + sizeof(struct smb2_symlink_err_rsp))
1133
1134 static int
1135 smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
1136                    const char *full_path, char **target_path,
1137                    struct cifs_sb_info *cifs_sb)
1138 {
1139         int rc;
1140         __le16 *utf16_path;
1141         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1142         struct cifs_open_parms oparms;
1143         struct cifs_fid fid;
1144         struct smb2_err_rsp *err_buf = NULL;
1145         struct smb2_symlink_err_rsp *symlink;
1146         unsigned int sub_len;
1147         unsigned int sub_offset;
1148         unsigned int print_len;
1149         unsigned int print_offset;
1150
1151         cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
1152
1153         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
1154         if (!utf16_path)
1155                 return -ENOMEM;
1156
1157         oparms.tcon = tcon;
1158         oparms.desired_access = FILE_READ_ATTRIBUTES;
1159         oparms.disposition = FILE_OPEN;
1160         oparms.create_options = 0;
1161         oparms.fid = &fid;
1162         oparms.reconnect = false;
1163
1164         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, &err_buf);
1165
1166         if (!rc || !err_buf) {
1167                 kfree(utf16_path);
1168                 return -ENOENT;
1169         }
1170
1171         if (le32_to_cpu(err_buf->ByteCount) < sizeof(struct smb2_symlink_err_rsp) ||
1172             get_rfc1002_length(err_buf) + 4 < SMB2_SYMLINK_STRUCT_SIZE) {
1173                 kfree(utf16_path);
1174                 return -ENOENT;
1175         }
1176
1177         /* open must fail on symlink - reset rc */
1178         rc = 0;
1179         symlink = (struct smb2_symlink_err_rsp *)err_buf->ErrorData;
1180         sub_len = le16_to_cpu(symlink->SubstituteNameLength);
1181         sub_offset = le16_to_cpu(symlink->SubstituteNameOffset);
1182         print_len = le16_to_cpu(symlink->PrintNameLength);
1183         print_offset = le16_to_cpu(symlink->PrintNameOffset);
1184
1185         if (get_rfc1002_length(err_buf) + 4 <
1186                         SMB2_SYMLINK_STRUCT_SIZE + sub_offset + sub_len) {
1187                 kfree(utf16_path);
1188                 return -ENOENT;
1189         }
1190
1191         if (get_rfc1002_length(err_buf) + 4 <
1192                         SMB2_SYMLINK_STRUCT_SIZE + print_offset + print_len) {
1193                 kfree(utf16_path);
1194                 return -ENOENT;
1195         }
1196
1197         *target_path = cifs_strndup_from_utf16(
1198                                 (char *)symlink->PathBuffer + sub_offset,
1199                                 sub_len, true, cifs_sb->local_nls);
1200         if (!(*target_path)) {
1201                 kfree(utf16_path);
1202                 return -ENOMEM;
1203         }
1204         convert_delimiter(*target_path, '/');
1205         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
1206         kfree(utf16_path);
1207         return rc;
1208 }
1209
1210 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
1211                             loff_t offset, loff_t len, bool keep_size)
1212 {
1213         struct inode *inode;
1214         struct cifsInodeInfo *cifsi;
1215         struct cifsFileInfo *cfile = file->private_data;
1216         struct file_zero_data_information fsctl_buf;
1217         long rc;
1218         unsigned int xid;
1219
1220         xid = get_xid();
1221
1222         inode = d_inode(cfile->dentry);
1223         cifsi = CIFS_I(inode);
1224
1225         /*
1226          * We zero the range through ioctl, so we need remove the page caches
1227          * first, otherwise the data may be inconsistent with the server.
1228          */
1229         truncate_pagecache_range(inode, offset, offset + len - 1);
1230
1231         /* if file not oplocked can't be sure whether asking to extend size */
1232         if (!CIFS_CACHE_READ(cifsi))
1233                 if (keep_size == false)
1234                         return -EOPNOTSUPP;
1235
1236         /*
1237          * Must check if file sparse since fallocate -z (zero range) assumes
1238          * non-sparse allocation
1239          */
1240         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE))
1241                 return -EOPNOTSUPP;
1242
1243         /*
1244          * need to make sure we are not asked to extend the file since the SMB3
1245          * fsctl does not change the file size. In the future we could change
1246          * this to zero the first part of the range then set the file size
1247          * which for a non sparse file would zero the newly extended range
1248          */
1249         if (keep_size == false)
1250                 if (i_size_read(inode) < offset + len)
1251                         return -EOPNOTSUPP;
1252
1253         cifs_dbg(FYI, "offset %lld len %lld", offset, len);
1254
1255         fsctl_buf.FileOffset = cpu_to_le64(offset);
1256         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
1257
1258         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1259                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
1260                         true /* is_fctl */, (char *)&fsctl_buf,
1261                         sizeof(struct file_zero_data_information), NULL, NULL);
1262         free_xid(xid);
1263         return rc;
1264 }
1265
1266 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
1267                             loff_t offset, loff_t len)
1268 {
1269         struct inode *inode;
1270         struct cifsInodeInfo *cifsi;
1271         struct cifsFileInfo *cfile = file->private_data;
1272         struct file_zero_data_information fsctl_buf;
1273         long rc;
1274         unsigned int xid;
1275         __u8 set_sparse = 1;
1276
1277         xid = get_xid();
1278
1279         inode = d_inode(cfile->dentry);
1280         cifsi = CIFS_I(inode);
1281
1282         /* Need to make file sparse, if not already, before freeing range. */
1283         /* Consider adding equivalent for compressed since it could also work */
1284         if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse))
1285                 return -EOPNOTSUPP;
1286
1287         /*
1288          * We implement the punch hole through ioctl, so we need remove the page
1289          * caches first, otherwise the data may be inconsistent with the server.
1290          */
1291         truncate_pagecache_range(inode, offset, offset + len - 1);
1292
1293         cifs_dbg(FYI, "offset %lld len %lld", offset, len);
1294
1295         fsctl_buf.FileOffset = cpu_to_le64(offset);
1296         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
1297
1298         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1299                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
1300                         true /* is_fctl */, (char *)&fsctl_buf,
1301                         sizeof(struct file_zero_data_information), NULL, NULL);
1302         free_xid(xid);
1303         return rc;
1304 }
1305
1306 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
1307                             loff_t off, loff_t len, bool keep_size)
1308 {
1309         struct inode *inode;
1310         struct cifsInodeInfo *cifsi;
1311         struct cifsFileInfo *cfile = file->private_data;
1312         long rc = -EOPNOTSUPP;
1313         unsigned int xid;
1314
1315         xid = get_xid();
1316
1317         inode = d_inode(cfile->dentry);
1318         cifsi = CIFS_I(inode);
1319
1320         /* if file not oplocked can't be sure whether asking to extend size */
1321         if (!CIFS_CACHE_READ(cifsi))
1322                 if (keep_size == false)
1323                         return -EOPNOTSUPP;
1324
1325         /*
1326          * Files are non-sparse by default so falloc may be a no-op
1327          * Must check if file sparse. If not sparse, and not extending
1328          * then no need to do anything since file already allocated
1329          */
1330         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
1331                 if (keep_size == true)
1332                         return 0;
1333                 /* check if extending file */
1334                 else if (i_size_read(inode) >= off + len)
1335                         /* not extending file and already not sparse */
1336                         return 0;
1337                 /* BB: in future add else clause to extend file */
1338                 else
1339                         return -EOPNOTSUPP;
1340         }
1341
1342         if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
1343                 /*
1344                  * Check if falloc starts within first few pages of file
1345                  * and ends within a few pages of the end of file to
1346                  * ensure that most of file is being forced to be
1347                  * fallocated now. If so then setting whole file sparse
1348                  * ie potentially making a few extra pages at the beginning
1349                  * or end of the file non-sparse via set_sparse is harmless.
1350                  */
1351                 if ((off > 8192) || (off + len + 8192 < i_size_read(inode)))
1352                         return -EOPNOTSUPP;
1353
1354                 rc = smb2_set_sparse(xid, tcon, cfile, inode, false);
1355         }
1356         /* BB: else ... in future add code to extend file and set sparse */
1357
1358
1359         free_xid(xid);
1360         return rc;
1361 }
1362
1363
1364 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
1365                            loff_t off, loff_t len)
1366 {
1367         /* KEEP_SIZE already checked for by do_fallocate */
1368         if (mode & FALLOC_FL_PUNCH_HOLE)
1369                 return smb3_punch_hole(file, tcon, off, len);
1370         else if (mode & FALLOC_FL_ZERO_RANGE) {
1371                 if (mode & FALLOC_FL_KEEP_SIZE)
1372                         return smb3_zero_range(file, tcon, off, len, true);
1373                 return smb3_zero_range(file, tcon, off, len, false);
1374         } else if (mode == FALLOC_FL_KEEP_SIZE)
1375                 return smb3_simple_falloc(file, tcon, off, len, true);
1376         else if (mode == 0)
1377                 return smb3_simple_falloc(file, tcon, off, len, false);
1378
1379         return -EOPNOTSUPP;
1380 }
1381
1382 static void
1383 smb2_downgrade_oplock(struct TCP_Server_Info *server,
1384                       struct cifsInodeInfo *cinode, __u32 oplock,
1385                       unsigned int epoch, bool *purge_cache)
1386 {
1387         server->ops->set_oplock_level(cinode, oplock, 0, NULL);
1388 }
1389
1390 static void
1391 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1392                        unsigned int epoch, bool *purge_cache);
1393
1394 static void
1395 smb3_downgrade_oplock(struct TCP_Server_Info *server,
1396                        struct cifsInodeInfo *cinode, __u32 oplock,
1397                        unsigned int epoch, bool *purge_cache)
1398 {
1399         unsigned int old_state = cinode->oplock;
1400         unsigned int old_epoch = cinode->epoch;
1401         unsigned int new_state;
1402
1403         if (epoch > old_epoch) {
1404                 smb21_set_oplock_level(cinode, oplock, 0, NULL);
1405                 cinode->epoch = epoch;
1406         }
1407
1408         new_state = cinode->oplock;
1409         *purge_cache = false;
1410
1411         if ((old_state & CIFS_CACHE_READ_FLG) != 0 &&
1412             (new_state & CIFS_CACHE_READ_FLG) == 0)
1413                 *purge_cache = true;
1414         else if (old_state == new_state && (epoch - old_epoch > 1))
1415                 *purge_cache = true;
1416 }
1417
1418 static void
1419 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1420                       unsigned int epoch, bool *purge_cache)
1421 {
1422         oplock &= 0xFF;
1423         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
1424                 return;
1425         if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
1426                 cinode->oplock = CIFS_CACHE_RHW_FLG;
1427                 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
1428                          &cinode->vfs_inode);
1429         } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
1430                 cinode->oplock = CIFS_CACHE_RW_FLG;
1431                 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
1432                          &cinode->vfs_inode);
1433         } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
1434                 cinode->oplock = CIFS_CACHE_READ_FLG;
1435                 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
1436                          &cinode->vfs_inode);
1437         } else
1438                 cinode->oplock = 0;
1439 }
1440
1441 static void
1442 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1443                        unsigned int epoch, bool *purge_cache)
1444 {
1445         char message[5] = {0};
1446         unsigned int new_oplock = 0;
1447
1448         oplock &= 0xFF;
1449         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
1450                 return;
1451
1452         /* Check if the server granted an oplock rather than a lease */
1453         if (oplock & SMB2_OPLOCK_LEVEL_EXCLUSIVE)
1454                 return smb2_set_oplock_level(cinode, oplock, epoch,
1455                                              purge_cache);
1456
1457         if (oplock & SMB2_LEASE_READ_CACHING_HE) {
1458                 new_oplock |= CIFS_CACHE_READ_FLG;
1459                 strcat(message, "R");
1460         }
1461         if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
1462                 new_oplock |= CIFS_CACHE_HANDLE_FLG;
1463                 strcat(message, "H");
1464         }
1465         if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
1466                 new_oplock |= CIFS_CACHE_WRITE_FLG;
1467                 strcat(message, "W");
1468         }
1469         if (!new_oplock)
1470                 strncpy(message, "None", sizeof(message));
1471
1472         cinode->oplock = new_oplock;
1473         cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
1474                  &cinode->vfs_inode);
1475 }
1476
1477 static void
1478 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1479                       unsigned int epoch, bool *purge_cache)
1480 {
1481         unsigned int old_oplock = cinode->oplock;
1482
1483         smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
1484
1485         if (purge_cache) {
1486                 *purge_cache = false;
1487                 if (old_oplock == CIFS_CACHE_READ_FLG) {
1488                         if (cinode->oplock == CIFS_CACHE_READ_FLG &&
1489                             (epoch - cinode->epoch > 0))
1490                                 *purge_cache = true;
1491                         else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
1492                                  (epoch - cinode->epoch > 1))
1493                                 *purge_cache = true;
1494                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
1495                                  (epoch - cinode->epoch > 1))
1496                                 *purge_cache = true;
1497                         else if (cinode->oplock == 0 &&
1498                                  (epoch - cinode->epoch > 0))
1499                                 *purge_cache = true;
1500                 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
1501                         if (cinode->oplock == CIFS_CACHE_RH_FLG &&
1502                             (epoch - cinode->epoch > 0))
1503                                 *purge_cache = true;
1504                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
1505                                  (epoch - cinode->epoch > 1))
1506                                 *purge_cache = true;
1507                 }
1508                 cinode->epoch = epoch;
1509         }
1510 }
1511
1512 static bool
1513 smb2_is_read_op(__u32 oplock)
1514 {
1515         return oplock == SMB2_OPLOCK_LEVEL_II;
1516 }
1517
1518 static bool
1519 smb21_is_read_op(__u32 oplock)
1520 {
1521         return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
1522                !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
1523 }
1524
1525 static __le32
1526 map_oplock_to_lease(u8 oplock)
1527 {
1528         if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
1529                 return SMB2_LEASE_WRITE_CACHING | SMB2_LEASE_READ_CACHING;
1530         else if (oplock == SMB2_OPLOCK_LEVEL_II)
1531                 return SMB2_LEASE_READ_CACHING;
1532         else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
1533                 return SMB2_LEASE_HANDLE_CACHING | SMB2_LEASE_READ_CACHING |
1534                        SMB2_LEASE_WRITE_CACHING;
1535         return 0;
1536 }
1537
1538 static char *
1539 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
1540 {
1541         struct create_lease *buf;
1542
1543         buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
1544         if (!buf)
1545                 return NULL;
1546
1547         buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
1548         buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
1549         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
1550
1551         buf->ccontext.DataOffset = cpu_to_le16(offsetof
1552                                         (struct create_lease, lcontext));
1553         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
1554         buf->ccontext.NameOffset = cpu_to_le16(offsetof
1555                                 (struct create_lease, Name));
1556         buf->ccontext.NameLength = cpu_to_le16(4);
1557         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
1558         buf->Name[0] = 'R';
1559         buf->Name[1] = 'q';
1560         buf->Name[2] = 'L';
1561         buf->Name[3] = 's';
1562         return (char *)buf;
1563 }
1564
1565 static char *
1566 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
1567 {
1568         struct create_lease_v2 *buf;
1569
1570         buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
1571         if (!buf)
1572                 return NULL;
1573
1574         buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
1575         buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
1576         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
1577
1578         buf->ccontext.DataOffset = cpu_to_le16(offsetof
1579                                         (struct create_lease_v2, lcontext));
1580         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
1581         buf->ccontext.NameOffset = cpu_to_le16(offsetof
1582                                 (struct create_lease_v2, Name));
1583         buf->ccontext.NameLength = cpu_to_le16(4);
1584         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
1585         buf->Name[0] = 'R';
1586         buf->Name[1] = 'q';
1587         buf->Name[2] = 'L';
1588         buf->Name[3] = 's';
1589         return (char *)buf;
1590 }
1591
1592 static __u8
1593 smb2_parse_lease_buf(void *buf, unsigned int *epoch)
1594 {
1595         struct create_lease *lc = (struct create_lease *)buf;
1596
1597         *epoch = 0; /* not used */
1598         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
1599                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
1600         return le32_to_cpu(lc->lcontext.LeaseState);
1601 }
1602
1603 static __u8
1604 smb3_parse_lease_buf(void *buf, unsigned int *epoch)
1605 {
1606         struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
1607
1608         *epoch = le16_to_cpu(lc->lcontext.Epoch);
1609         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
1610                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
1611         return le32_to_cpu(lc->lcontext.LeaseState);
1612 }
1613
1614 static unsigned int
1615 smb2_wp_retry_size(struct inode *inode)
1616 {
1617         return min_t(unsigned int, CIFS_SB(inode->i_sb)->wsize,
1618                      SMB2_MAX_BUFFER_SIZE);
1619 }
1620
1621 static bool
1622 smb2_dir_needs_close(struct cifsFileInfo *cfile)
1623 {
1624         return !cfile->invalidHandle;
1625 }
1626
1627 struct smb_version_operations smb20_operations = {
1628         .compare_fids = smb2_compare_fids,
1629         .setup_request = smb2_setup_request,
1630         .setup_async_request = smb2_setup_async_request,
1631         .check_receive = smb2_check_receive,
1632         .add_credits = smb2_add_credits,
1633         .set_credits = smb2_set_credits,
1634         .get_credits_field = smb2_get_credits_field,
1635         .get_credits = smb2_get_credits,
1636         .wait_mtu_credits = cifs_wait_mtu_credits,
1637         .get_next_mid = smb2_get_next_mid,
1638         .read_data_offset = smb2_read_data_offset,
1639         .read_data_length = smb2_read_data_length,
1640         .map_error = map_smb2_to_linux_error,
1641         .find_mid = smb2_find_mid,
1642         .check_message = smb2_check_message,
1643         .dump_detail = smb2_dump_detail,
1644         .clear_stats = smb2_clear_stats,
1645         .print_stats = smb2_print_stats,
1646         .is_oplock_break = smb2_is_valid_oplock_break,
1647         .handle_cancelled_mid = smb2_handle_cancelled_mid,
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         .is_session_expired = smb2_is_session_expired,
1691         .oplock_response = smb2_oplock_response,
1692         .queryfs = smb2_queryfs,
1693         .mand_lock = smb2_mand_lock,
1694         .mand_unlock_range = smb2_unlock_range,
1695         .push_mand_locks = smb2_push_mandatory_locks,
1696         .get_lease_key = smb2_get_lease_key,
1697         .set_lease_key = smb2_set_lease_key,
1698         .new_lease_key = smb2_new_lease_key,
1699         .calc_signature = smb2_calc_signature,
1700         .is_read_op = smb2_is_read_op,
1701         .set_oplock_level = smb2_set_oplock_level,
1702         .create_lease_buf = smb2_create_lease_buf,
1703         .parse_lease_buf = smb2_parse_lease_buf,
1704         .clone_range = smb2_clone_range,
1705         .wp_retry_size = smb2_wp_retry_size,
1706         .dir_needs_close = smb2_dir_needs_close,
1707 };
1708
1709 struct smb_version_operations smb21_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         .is_oplock_break = smb2_is_valid_oplock_break,
1729         .handle_cancelled_mid = smb2_handle_cancelled_mid,
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 = smb2_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         .is_session_expired = smb2_is_session_expired,
1773         .oplock_response = smb2_oplock_response,
1774         .queryfs = smb2_queryfs,
1775         .mand_lock = smb2_mand_lock,
1776         .mand_unlock_range = smb2_unlock_range,
1777         .push_mand_locks = smb2_push_mandatory_locks,
1778         .get_lease_key = smb2_get_lease_key,
1779         .set_lease_key = smb2_set_lease_key,
1780         .new_lease_key = smb2_new_lease_key,
1781         .calc_signature = smb2_calc_signature,
1782         .is_read_op = smb21_is_read_op,
1783         .set_oplock_level = smb21_set_oplock_level,
1784         .create_lease_buf = smb2_create_lease_buf,
1785         .parse_lease_buf = smb2_parse_lease_buf,
1786         .clone_range = smb2_clone_range,
1787         .wp_retry_size = smb2_wp_retry_size,
1788         .dir_needs_close = smb2_dir_needs_close,
1789         .enum_snapshots = smb3_enum_snapshots,
1790 };
1791
1792 struct smb_version_operations smb30_operations = {
1793         .compare_fids = smb2_compare_fids,
1794         .setup_request = smb2_setup_request,
1795         .setup_async_request = smb2_setup_async_request,
1796         .check_receive = smb2_check_receive,
1797         .add_credits = smb2_add_credits,
1798         .set_credits = smb2_set_credits,
1799         .get_credits_field = smb2_get_credits_field,
1800         .get_credits = smb2_get_credits,
1801         .wait_mtu_credits = smb2_wait_mtu_credits,
1802         .get_next_mid = smb2_get_next_mid,
1803         .read_data_offset = smb2_read_data_offset,
1804         .read_data_length = smb2_read_data_length,
1805         .map_error = map_smb2_to_linux_error,
1806         .find_mid = smb2_find_mid,
1807         .check_message = smb2_check_message,
1808         .dump_detail = smb2_dump_detail,
1809         .clear_stats = smb2_clear_stats,
1810         .print_stats = smb2_print_stats,
1811         .dump_share_caps = smb2_dump_share_caps,
1812         .is_oplock_break = smb2_is_valid_oplock_break,
1813         .handle_cancelled_mid = smb2_handle_cancelled_mid,
1814         .downgrade_oplock = smb3_downgrade_oplock,
1815         .need_neg = smb2_need_neg,
1816         .negotiate = smb2_negotiate,
1817         .negotiate_wsize = smb2_negotiate_wsize,
1818         .negotiate_rsize = smb2_negotiate_rsize,
1819         .sess_setup = SMB2_sess_setup,
1820         .logoff = SMB2_logoff,
1821         .tree_connect = SMB2_tcon,
1822         .tree_disconnect = SMB2_tdis,
1823         .qfs_tcon = smb3_qfs_tcon,
1824         .is_path_accessible = smb2_is_path_accessible,
1825         .can_echo = smb2_can_echo,
1826         .echo = SMB2_echo,
1827         .query_path_info = smb2_query_path_info,
1828         .get_srv_inum = smb2_get_srv_inum,
1829         .query_file_info = smb2_query_file_info,
1830         .set_path_size = smb2_set_path_size,
1831         .set_file_size = smb2_set_file_size,
1832         .set_file_info = smb2_set_file_info,
1833         .set_compression = smb2_set_compression,
1834         .mkdir = smb2_mkdir,
1835         .mkdir_setinfo = smb2_mkdir_setinfo,
1836         .rmdir = smb2_rmdir,
1837         .unlink = smb2_unlink,
1838         .rename = smb2_rename_path,
1839         .create_hardlink = smb2_create_hardlink,
1840         .query_symlink = smb2_query_symlink,
1841         .query_mf_symlink = smb3_query_mf_symlink,
1842         .create_mf_symlink = smb3_create_mf_symlink,
1843         .open = smb2_open_file,
1844         .set_fid = smb2_set_fid,
1845         .close = smb2_close_file,
1846         .flush = smb2_flush_file,
1847         .async_readv = smb2_async_readv,
1848         .async_writev = smb2_async_writev,
1849         .sync_read = smb2_sync_read,
1850         .sync_write = smb2_sync_write,
1851         .query_dir_first = smb2_query_dir_first,
1852         .query_dir_next = smb2_query_dir_next,
1853         .close_dir = smb2_close_dir,
1854         .calc_smb_size = smb2_calc_size,
1855         .is_status_pending = smb2_is_status_pending,
1856         .is_session_expired = smb2_is_session_expired,
1857         .oplock_response = smb2_oplock_response,
1858         .queryfs = smb2_queryfs,
1859         .mand_lock = smb2_mand_lock,
1860         .mand_unlock_range = smb2_unlock_range,
1861         .push_mand_locks = smb2_push_mandatory_locks,
1862         .get_lease_key = smb2_get_lease_key,
1863         .set_lease_key = smb2_set_lease_key,
1864         .new_lease_key = smb2_new_lease_key,
1865         .generate_signingkey = generate_smb30signingkey,
1866         .calc_signature = smb3_calc_signature,
1867         .set_integrity  = smb3_set_integrity,
1868         .is_read_op = smb21_is_read_op,
1869         .set_oplock_level = smb3_set_oplock_level,
1870         .create_lease_buf = smb3_create_lease_buf,
1871         .parse_lease_buf = smb3_parse_lease_buf,
1872         .clone_range = smb2_clone_range,
1873         .duplicate_extents = smb2_duplicate_extents,
1874         .validate_negotiate = smb3_validate_negotiate,
1875         .wp_retry_size = smb2_wp_retry_size,
1876         .dir_needs_close = smb2_dir_needs_close,
1877         .fallocate = smb3_fallocate,
1878         .enum_snapshots = smb3_enum_snapshots,
1879 };
1880
1881 #ifdef CONFIG_CIFS_SMB311
1882 struct smb_version_operations smb311_operations = {
1883         .compare_fids = smb2_compare_fids,
1884         .setup_request = smb2_setup_request,
1885         .setup_async_request = smb2_setup_async_request,
1886         .check_receive = smb2_check_receive,
1887         .add_credits = smb2_add_credits,
1888         .set_credits = smb2_set_credits,
1889         .get_credits_field = smb2_get_credits_field,
1890         .get_credits = smb2_get_credits,
1891         .wait_mtu_credits = smb2_wait_mtu_credits,
1892         .get_next_mid = smb2_get_next_mid,
1893         .read_data_offset = smb2_read_data_offset,
1894         .read_data_length = smb2_read_data_length,
1895         .map_error = map_smb2_to_linux_error,
1896         .find_mid = smb2_find_mid,
1897         .check_message = smb2_check_message,
1898         .dump_detail = smb2_dump_detail,
1899         .clear_stats = smb2_clear_stats,
1900         .print_stats = smb2_print_stats,
1901         .dump_share_caps = smb2_dump_share_caps,
1902         .is_oplock_break = smb2_is_valid_oplock_break,
1903         .handle_cancelled_mid = smb2_handle_cancelled_mid,
1904         .downgrade_oplock = smb3_downgrade_oplock,
1905         .need_neg = smb2_need_neg,
1906         .negotiate = smb2_negotiate,
1907         .negotiate_wsize = smb2_negotiate_wsize,
1908         .negotiate_rsize = smb2_negotiate_rsize,
1909         .sess_setup = SMB2_sess_setup,
1910         .logoff = SMB2_logoff,
1911         .tree_connect = SMB2_tcon,
1912         .tree_disconnect = SMB2_tdis,
1913         .qfs_tcon = smb3_qfs_tcon,
1914         .is_path_accessible = smb2_is_path_accessible,
1915         .can_echo = smb2_can_echo,
1916         .echo = SMB2_echo,
1917         .query_path_info = smb2_query_path_info,
1918         .get_srv_inum = smb2_get_srv_inum,
1919         .query_file_info = smb2_query_file_info,
1920         .set_path_size = smb2_set_path_size,
1921         .set_file_size = smb2_set_file_size,
1922         .set_file_info = smb2_set_file_info,
1923         .set_compression = smb2_set_compression,
1924         .mkdir = smb2_mkdir,
1925         .mkdir_setinfo = smb2_mkdir_setinfo,
1926         .rmdir = smb2_rmdir,
1927         .unlink = smb2_unlink,
1928         .rename = smb2_rename_path,
1929         .create_hardlink = smb2_create_hardlink,
1930         .query_symlink = smb2_query_symlink,
1931         .query_mf_symlink = smb3_query_mf_symlink,
1932         .create_mf_symlink = smb3_create_mf_symlink,
1933         .open = smb2_open_file,
1934         .set_fid = smb2_set_fid,
1935         .close = smb2_close_file,
1936         .flush = smb2_flush_file,
1937         .async_readv = smb2_async_readv,
1938         .async_writev = smb2_async_writev,
1939         .sync_read = smb2_sync_read,
1940         .sync_write = smb2_sync_write,
1941         .query_dir_first = smb2_query_dir_first,
1942         .query_dir_next = smb2_query_dir_next,
1943         .close_dir = smb2_close_dir,
1944         .calc_smb_size = smb2_calc_size,
1945         .is_status_pending = smb2_is_status_pending,
1946         .is_session_expired = smb2_is_session_expired,
1947         .oplock_response = smb2_oplock_response,
1948         .queryfs = smb2_queryfs,
1949         .mand_lock = smb2_mand_lock,
1950         .mand_unlock_range = smb2_unlock_range,
1951         .push_mand_locks = smb2_push_mandatory_locks,
1952         .get_lease_key = smb2_get_lease_key,
1953         .set_lease_key = smb2_set_lease_key,
1954         .new_lease_key = smb2_new_lease_key,
1955         .generate_signingkey = generate_smb311signingkey,
1956         .calc_signature = smb3_calc_signature,
1957         .set_integrity  = smb3_set_integrity,
1958         .is_read_op = smb21_is_read_op,
1959         .set_oplock_level = smb3_set_oplock_level,
1960         .create_lease_buf = smb3_create_lease_buf,
1961         .parse_lease_buf = smb3_parse_lease_buf,
1962         .clone_range = smb2_clone_range,
1963         .duplicate_extents = smb2_duplicate_extents,
1964 /*      .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
1965         .wp_retry_size = smb2_wp_retry_size,
1966         .dir_needs_close = smb2_dir_needs_close,
1967         .fallocate = smb3_fallocate,
1968         .enum_snapshots = smb3_enum_snapshots,
1969 };
1970 #endif /* CIFS_SMB311 */
1971
1972 struct smb_version_values smb20_values = {
1973         .version_string = SMB20_VERSION_STRING,
1974         .protocol_id = SMB20_PROT_ID,
1975         .req_capabilities = 0, /* MBZ */
1976         .large_lock_type = 0,
1977         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1978         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1979         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1980         .header_size = sizeof(struct smb2_hdr),
1981         .max_header_size = MAX_SMB2_HDR_SIZE,
1982         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1983         .lock_cmd = SMB2_LOCK,
1984         .cap_unix = 0,
1985         .cap_nt_find = SMB2_NT_FIND,
1986         .cap_large_files = SMB2_LARGE_FILES,
1987         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1988         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1989         .create_lease_size = sizeof(struct create_lease),
1990 };
1991
1992 struct smb_version_values smb21_values = {
1993         .version_string = SMB21_VERSION_STRING,
1994         .protocol_id = SMB21_PROT_ID,
1995         .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
1996         .large_lock_type = 0,
1997         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1998         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1999         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
2000         .header_size = sizeof(struct smb2_hdr),
2001         .max_header_size = MAX_SMB2_HDR_SIZE,
2002         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
2003         .lock_cmd = SMB2_LOCK,
2004         .cap_unix = 0,
2005         .cap_nt_find = SMB2_NT_FIND,
2006         .cap_large_files = SMB2_LARGE_FILES,
2007         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
2008         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
2009         .create_lease_size = sizeof(struct create_lease),
2010 };
2011
2012 struct smb_version_values smb30_values = {
2013         .version_string = SMB30_VERSION_STRING,
2014         .protocol_id = SMB30_PROT_ID,
2015         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
2016         .large_lock_type = 0,
2017         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
2018         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
2019         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
2020         .header_size = sizeof(struct smb2_hdr),
2021         .max_header_size = MAX_SMB2_HDR_SIZE,
2022         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
2023         .lock_cmd = SMB2_LOCK,
2024         .cap_unix = 0,
2025         .cap_nt_find = SMB2_NT_FIND,
2026         .cap_large_files = SMB2_LARGE_FILES,
2027         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
2028         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
2029         .create_lease_size = sizeof(struct create_lease_v2),
2030 };
2031
2032 struct smb_version_values smb302_values = {
2033         .version_string = SMB302_VERSION_STRING,
2034         .protocol_id = SMB302_PROT_ID,
2035         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
2036         .large_lock_type = 0,
2037         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
2038         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
2039         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
2040         .header_size = sizeof(struct smb2_hdr),
2041         .max_header_size = MAX_SMB2_HDR_SIZE,
2042         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
2043         .lock_cmd = SMB2_LOCK,
2044         .cap_unix = 0,
2045         .cap_nt_find = SMB2_NT_FIND,
2046         .cap_large_files = SMB2_LARGE_FILES,
2047         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
2048         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
2049         .create_lease_size = sizeof(struct create_lease_v2),
2050 };
2051
2052 #ifdef CONFIG_CIFS_SMB311
2053 struct smb_version_values smb311_values = {
2054         .version_string = SMB311_VERSION_STRING,
2055         .protocol_id = SMB311_PROT_ID,
2056         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES,
2057         .large_lock_type = 0,
2058         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
2059         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
2060         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
2061         .header_size = sizeof(struct smb2_hdr),
2062         .max_header_size = MAX_SMB2_HDR_SIZE,
2063         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
2064         .lock_cmd = SMB2_LOCK,
2065         .cap_unix = 0,
2066         .cap_nt_find = SMB2_NT_FIND,
2067         .cap_large_files = SMB2_LARGE_FILES,
2068         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
2069         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
2070         .create_lease_size = sizeof(struct create_lease_v2),
2071 };
2072 #endif /* SMB311 */