fs/cifs/cifsfs.c

   1 /*
   2  *   fs/cifs/cifsfs.c
   3  *
   4  *   Copyright (C) International Business Machines  Corp., 2002,2008
   5  *   Author(s): Steve French (sfrench@us.ibm.com)
   6  *
   7  *   Common Internet FileSystem (CIFS) client
   8  *
   9  *   This library is free software; you can redistribute it and/or modify
  10  *   it under the terms of the GNU Lesser General Public License as published
  11  *   by the Free Software Foundation; either version 2.1 of the License, or
  12  *   (at your option) any later version.
  13  *
  14  *   This library is distributed in the hope that it will be useful,
  15  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
  17  *   the GNU Lesser General Public License for more details.
  18  *
  19  *   You should have received a copy of the GNU Lesser General Public License
  20  *   along with this library; if not, write to the Free Software
  21  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  22  */
  23
  24 /* Note that BB means BUGBUG (ie something to fix eventually) */
  25
  26 #include <linux/module.h>
  27 #include <linux/fs.h>
  28 #include <linux/mount.h>
  29 #include <linux/slab.h>
  30 #include <linux/init.h>
  31 #include <linux/list.h>
  32 #include <linux/seq_file.h>
  33 #include <linux/vfs.h>
  34 #include <linux/mempool.h>
  35 #include <linux/delay.h>
  36 #include <linux/kthread.h>
  37 #include <linux/freezer.h>
  38 #include <linux/namei.h>
  39 #include <net/ipv6.h>
  40 #include "cifsfs.h"
  41 #include "cifspdu.h"
  42 #define DECLARE_GLOBALS_HERE
  43 #include "cifsglob.h"
  44 #include "cifsproto.h"
  45 #include "cifs_debug.h"
  46 #include "cifs_fs_sb.h"
  47 #include <linux/mm.h>
  48 #include <linux/key-type.h>
  49 #include "cifs_spnego.h"
  50 #include "fscache.h"
  51 #define CIFS_MAGIC_NUMBER 0xFF534D42    /* the first four bytes of SMB PDUs */
  52
  53 int cifsFYI = 0;
  54 int cifsERROR = 1;
  55 int traceSMB = 0;
  56 bool enable_oplocks = true;
  57 unsigned int linuxExtEnabled = 1;
  58 unsigned int lookupCacheEnabled = 1;
  59 unsigned int multiuser_mount = 0;
  60 unsigned int global_secflags = CIFSSEC_DEF;
  61 /* unsigned int ntlmv2_support = 0; */
  62 unsigned int sign_CIFS_PDUs = 1;
  63 static const struct super_operations cifs_super_ops;
  64 unsigned int CIFSMaxBufSize = CIFS_MAX_MSGSIZE;
  65 module_param(CIFSMaxBufSize, int, 0);
  66 MODULE_PARM_DESC(CIFSMaxBufSize, "Network buffer size (not including header). "
  67                                  "Default: 16384 Range: 8192 to 130048");
  68 unsigned int cifs_min_rcv = CIFS_MIN_RCV_POOL;
  69 module_param(cifs_min_rcv, int, 0);
  70 MODULE_PARM_DESC(cifs_min_rcv, "Network buffers in pool. Default: 4 Range: "
  71                                 "1 to 64");
  72 unsigned int cifs_min_small = 30;
  73 module_param(cifs_min_small, int, 0);
  74 MODULE_PARM_DESC(cifs_min_small, "Small network buffers in pool. Default: 30 "
  75                                  "Range: 2 to 256");
  76 unsigned int cifs_max_pending = CIFS_MAX_REQ;
  77 module_param(cifs_max_pending, int, 0444);
  78 MODULE_PARM_DESC(cifs_max_pending, "Simultaneous requests to server. "
  79                                    "Default: 32767 Range: 2 to 32767.");
  80 module_param(enable_oplocks, bool, 0644);
  81 MODULE_PARM_DESC(enable_oplocks, "Enable or disable oplocks (bool). Default:"
  82                                  "y/Y/1");
  83
  84 extern mempool_t *cifs_sm_req_poolp;
  85 extern mempool_t *cifs_req_poolp;
  86 extern mempool_t *cifs_mid_poolp;
  87
  88 struct workqueue_struct *cifsiod_wq;
  89
  90 static int
  91 cifs_read_super(struct super_block *sb)
  92 {
  93         struct inode *inode;
  94         struct cifs_sb_info *cifs_sb;
  95         int rc = 0;
  96
  97         cifs_sb = CIFS_SB(sb);
  98
  99         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIXACL)
 100                 sb->s_flags |= MS_POSIXACL;
 101
 102         if (cifs_sb_master_tcon(cifs_sb)->ses->capabilities & CAP_LARGE_FILES)
 103                 sb->s_maxbytes = MAX_LFS_FILESIZE;
 104         else
 105                 sb->s_maxbytes = MAX_NON_LFS;
 106
 107         /* BB FIXME fix time_gran to be larger for LANMAN sessions */
 108         sb->s_time_gran = 100;
 109
 110         sb->s_magic = CIFS_MAGIC_NUMBER;
 111         sb->s_op = &cifs_super_ops;
 112         sb->s_bdi = &cifs_sb->bdi;
 113         sb->s_blocksize = CIFS_MAX_MSGSIZE;
 114         sb->s_blocksize_bits = 14;      /* default 2**14 = CIFS_MAX_MSGSIZE */
 115         inode = cifs_root_iget(sb);
 116
 117         if (IS_ERR(inode)) {
 118                 rc = PTR_ERR(inode);
 119                 goto out_no_root;
 120         }
 121
 122         sb->s_root = d_make_root(inode);
 123         if (!sb->s_root) {
 124                 rc = -ENOMEM;
 125                 goto out_no_root;
 126         }
 127
 128         /* do that *after* d_alloc_root() - we want NULL ->d_op for root here */
 129         if (cifs_sb_master_tcon(cifs_sb)->nocase)
 130                 sb->s_d_op = &cifs_ci_dentry_ops;
 131         else
 132                 sb->s_d_op = &cifs_dentry_ops;
 133
 134 #ifdef CONFIG_CIFS_NFSD_EXPORT
 135         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
 136                 cFYI(1, "export ops supported");
 137                 sb->s_export_op = &cifs_export_ops;
 138         }
 139 #endif /* CONFIG_CIFS_NFSD_EXPORT */
 140
 141         return 0;
 142
 143 out_no_root:
 144         cERROR(1, "cifs_read_super: get root inode failed");
 145         return rc;
 146 }
 147
 148 static void cifs_kill_sb(struct super_block *sb)
 149 {
 150         struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
 151         kill_anon_super(sb);
 152         cifs_umount(cifs_sb);
 153 }
 154
 155 static int
 156 cifs_statfs(struct dentry *dentry, struct kstatfs *buf)
 157 {
 158         struct super_block *sb = dentry->d_sb;
 159         struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
 160         struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
 161         int rc = -EOPNOTSUPP;
 162         int xid;
 163
 164         xid = GetXid();
 165
 166         buf->f_type = CIFS_MAGIC_NUMBER;
 167
 168         /*
 169          * PATH_MAX may be too long - it would presumably be total path,
 170          * but note that some servers (includinng Samba 3) have a shorter
 171          * maximum path.
 172          *
 173          * Instead could get the real value via SMB_QUERY_FS_ATTRIBUTE_INFO.
 174          */
 175         buf->f_namelen = PATH_MAX;
 176         buf->f_files = 0;       /* undefined */
 177         buf->f_ffree = 0;       /* unlimited */
 178
 179         /*
 180          * We could add a second check for a QFS Unix capability bit
 181          */
 182         if ((tcon->ses->capabilities & CAP_UNIX) &&
 183             (CIFS_POSIX_EXTENSIONS & le64_to_cpu(tcon->fsUnixInfo.Capability)))
 184                 rc = CIFSSMBQFSPosixInfo(xid, tcon, buf);
 185
 186         /*
 187          * Only need to call the old QFSInfo if failed on newer one,
 188          * e.g. by OS/2.
 189          **/
 190         if (rc && (tcon->ses->capabilities & CAP_NT_SMBS))
 191                 rc = CIFSSMBQFSInfo(xid, tcon, buf);
 192
 193         /*
 194          * Some old Windows servers also do not support level 103, retry with
 195          * older level one if old server failed the previous call or we
 196          * bypassed it because we detected that this was an older LANMAN sess
 197          */
 198         if (rc)
 199                 rc = SMBOldQFSInfo(xid, tcon, buf);
 200
 201         FreeXid(xid);
 202         return 0;
 203 }
 204
 205 static int cifs_permission(struct inode *inode, int mask)
 206 {
 207         struct cifs_sb_info *cifs_sb;
 208
 209         cifs_sb = CIFS_SB(inode->i_sb);
 210
 211         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) {
 212                 if ((mask & MAY_EXEC) && !execute_ok(inode))
 213                         return -EACCES;
 214                 else
 215                         return 0;
 216         } else /* file mode might have been restricted at mount time
 217                 on the client (above and beyond ACL on servers) for
 218                 servers which do not support setting and viewing mode bits,
 219                 so allowing client to check permissions is useful */
 220                 return generic_permission(inode, mask);
 221 }
 222
 223 static struct kmem_cache *cifs_inode_cachep;
 224 static struct kmem_cache *cifs_req_cachep;
 225 static struct kmem_cache *cifs_mid_cachep;
 226 static struct kmem_cache *cifs_sm_req_cachep;
 227 mempool_t *cifs_sm_req_poolp;
 228 mempool_t *cifs_req_poolp;
 229 mempool_t *cifs_mid_poolp;
 230
 231 static struct inode *
 232 cifs_alloc_inode(struct super_block *sb)
 233 {
 234         struct cifsInodeInfo *cifs_inode;
 235         cifs_inode = kmem_cache_alloc(cifs_inode_cachep, GFP_KERNEL);
 236         if (!cifs_inode)
 237                 return NULL;
 238         cifs_inode->cifsAttrs = 0x20;   /* default */
 239         cifs_inode->time = 0;
 240         /* Until the file is open and we have gotten oplock
 241         info back from the server, can not assume caching of
 242         file data or metadata */
 243         cifs_set_oplock_level(cifs_inode, 0);
 244         cifs_inode->delete_pending = false;
 245         cifs_inode->invalid_mapping = false;
 246         cifs_inode->vfs_inode.i_blkbits = 14;  /* 2**14 = CIFS_MAX_MSGSIZE */
 247         cifs_inode->server_eof = 0;
 248         cifs_inode->uniqueid = 0;
 249         cifs_inode->createtime = 0;
 250
 251         /* Can not set i_flags here - they get immediately overwritten
 252            to zero by the VFS */
 253 /*      cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME;*/
 254         INIT_LIST_HEAD(&cifs_inode->openFileList);
 255         return &cifs_inode->vfs_inode;
 256 }
 257
 258 static void cifs_i_callback(struct rcu_head *head)
 259 {
 260         struct inode *inode = container_of(head, struct inode, i_rcu);
 261         INIT_LIST_HEAD(&inode->i_dentry);
 262         kmem_cache_free(cifs_inode_cachep, CIFS_I(inode));
 263 }
 264
 265 static void
 266 cifs_destroy_inode(struct inode *inode)
 267 {
 268         call_rcu(&inode->i_rcu, cifs_i_callback);
 269 }
 270
 271 static void
 272 cifs_evict_inode(struct inode *inode)
 273 {
 274         truncate_inode_pages(&inode->i_data, 0);
 275         end_writeback(inode);
 276         cifs_fscache_release_inode_cookie(inode);
 277 }
 278
 279 static void
 280 cifs_show_address(struct seq_file *s, struct TCP_Server_Info *server)
 281 {
 282         struct sockaddr_in *sa = (struct sockaddr_in *) &server->dstaddr;
 283         struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *) &server->dstaddr;
 284
 285         seq_printf(s, ",addr=");
 286
 287         switch (server->dstaddr.ss_family) {
 288         case AF_INET:
 289                 seq_printf(s, "%pI4", &sa->sin_addr.s_addr);
 290                 break;
 291         case AF_INET6:
 292                 seq_printf(s, "%pI6", &sa6->sin6_addr.s6_addr);
 293                 if (sa6->sin6_scope_id)
 294                         seq_printf(s, "%%%u", sa6->sin6_scope_id);
 295                 break;
 296         default:
 297                 seq_printf(s, "(unknown)");
 298         }
 299 }
 300
 301 static void
 302 cifs_show_security(struct seq_file *s, struct TCP_Server_Info *server)
 303 {
 304         seq_printf(s, ",sec=");
 305
 306         switch (server->secType) {
 307         case LANMAN:
 308                 seq_printf(s, "lanman");
 309                 break;
 310         case NTLMv2:
 311                 seq_printf(s, "ntlmv2");
 312                 break;
 313         case NTLM:
 314                 seq_printf(s, "ntlm");
 315                 break;
 316         case Kerberos:
 317                 seq_printf(s, "krb5");
 318                 break;
 319         case RawNTLMSSP:
 320                 seq_printf(s, "ntlmssp");
 321                 break;
 322         default:
 323                 /* shouldn't ever happen */
 324                 seq_printf(s, "unknown");
 325                 break;
 326         }
 327
 328         if (server->sec_mode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
 329                 seq_printf(s, "i");
 330 }
 331
 332 /*
 333  * cifs_show_options() is for displaying mount options in /proc/mounts.
 334  * Not all settable options are displayed but most of the important
 335  * ones are.
 336  */
 337 static int
 338 cifs_show_options(struct seq_file *s, struct dentry *root)
 339 {
 340         struct cifs_sb_info *cifs_sb = CIFS_SB(root->d_sb);
 341         struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
 342         struct sockaddr *srcaddr;
 343         srcaddr = (struct sockaddr *)&tcon->ses->server->srcaddr;
 344
 345         cifs_show_security(s, tcon->ses->server);
 346
 347         seq_printf(s, ",unc=%s", tcon->treeName);
 348
 349         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER)
 350                 seq_printf(s, ",multiuser");
 351         else if (tcon->ses->user_name)
 352                 seq_printf(s, ",username=%s", tcon->ses->user_name);
 353
 354         if (tcon->ses->domainName)
 355                 seq_printf(s, ",domain=%s", tcon->ses->domainName);
 356
 357         if (srcaddr->sa_family != AF_UNSPEC) {
 358                 struct sockaddr_in *saddr4;
 359                 struct sockaddr_in6 *saddr6;
 360                 saddr4 = (struct sockaddr_in *)srcaddr;
 361                 saddr6 = (struct sockaddr_in6 *)srcaddr;
 362                 if (srcaddr->sa_family == AF_INET6)
 363                         seq_printf(s, ",srcaddr=%pI6c",
 364                                    &saddr6->sin6_addr);
 365                 else if (srcaddr->sa_family == AF_INET)
 366                         seq_printf(s, ",srcaddr=%pI4",
 367                                    &saddr4->sin_addr.s_addr);
 368                 else
 369                         seq_printf(s, ",srcaddr=BAD-AF:%i",
 370                                    (int)(srcaddr->sa_family));
 371         }
 372
 373         seq_printf(s, ",uid=%d", cifs_sb->mnt_uid);
 374         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)
 375                 seq_printf(s, ",forceuid");
 376         else
 377                 seq_printf(s, ",noforceuid");
 378
 379         seq_printf(s, ",gid=%d", cifs_sb->mnt_gid);
 380         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)
 381                 seq_printf(s, ",forcegid");
 382         else
 383                 seq_printf(s, ",noforcegid");
 384
 385         cifs_show_address(s, tcon->ses->server);
 386
 387         if (!tcon->unix_ext)
 388                 seq_printf(s, ",file_mode=0%ho,dir_mode=0%ho",
 389                                            cifs_sb->mnt_file_mode,
 390                                            cifs_sb->mnt_dir_mode);
 391         if (tcon->seal)
 392                 seq_printf(s, ",seal");
 393         if (tcon->nocase)
 394                 seq_printf(s, ",nocase");
 395         if (tcon->retry)
 396                 seq_printf(s, ",hard");
 397         if (tcon->unix_ext)
 398                 seq_printf(s, ",unix");
 399         else
 400                 seq_printf(s, ",nounix");
 401         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
 402                 seq_printf(s, ",posixpaths");
 403         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)
 404                 seq_printf(s, ",setuids");
 405         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
 406                 seq_printf(s, ",serverino");
 407         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RWPIDFORWARD)
 408                 seq_printf(s, ",rwpidforward");
 409         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL)
 410                 seq_printf(s, ",forcemand");
 411         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO)
 412                 seq_printf(s, ",directio");
 413         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
 414                 seq_printf(s, ",nouser_xattr");
 415         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR)
 416                 seq_printf(s, ",mapchars");
 417         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)
 418                 seq_printf(s, ",sfu");
 419         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
 420                 seq_printf(s, ",nobrl");
 421         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
 422                 seq_printf(s, ",cifsacl");
 423         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)
 424                 seq_printf(s, ",dynperm");
 425         if (root->d_sb->s_flags & MS_POSIXACL)
 426                 seq_printf(s, ",acl");
 427         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS)
 428                 seq_printf(s, ",mfsymlinks");
 429         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_FSCACHE)
 430                 seq_printf(s, ",fsc");
 431         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOSSYNC)
 432                 seq_printf(s, ",nostrictsync");
 433         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM)
 434                 seq_printf(s, ",noperm");
 435         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_STRICT_IO)
 436                 seq_printf(s, ",strictcache");
 437
 438         seq_printf(s, ",rsize=%d", cifs_sb->rsize);
 439         seq_printf(s, ",wsize=%d", cifs_sb->wsize);
 440         /* convert actimeo and display it in seconds */
 441                 seq_printf(s, ",actimeo=%lu", cifs_sb->actimeo / HZ);
 442
 443         return 0;
 444 }
 445
 446 static void cifs_umount_begin(struct super_block *sb)
 447 {
 448         struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
 449         struct cifs_tcon *tcon;
 450
 451         if (cifs_sb == NULL)
 452                 return;
 453
 454         tcon = cifs_sb_master_tcon(cifs_sb);
 455
 456         spin_lock(&cifs_tcp_ses_lock);
 457         if ((tcon->tc_count > 1) || (tcon->tidStatus == CifsExiting)) {
 458                 /* we have other mounts to same share or we have
 459                    already tried to force umount this and woken up
 460                    all waiting network requests, nothing to do */
 461                 spin_unlock(&cifs_tcp_ses_lock);
 462                 return;
 463         } else if (tcon->tc_count == 1)
 464                 tcon->tidStatus = CifsExiting;
 465         spin_unlock(&cifs_tcp_ses_lock);
 466
 467         /* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */
 468         /* cancel_notify_requests(tcon); */
 469         if (tcon->ses && tcon->ses->server) {
 470                 cFYI(1, "wake up tasks now - umount begin not complete");
 471                 wake_up_all(&tcon->ses->server->request_q);
 472                 wake_up_all(&tcon->ses->server->response_q);
 473                 msleep(1); /* yield */
 474                 /* we have to kick the requests once more */
 475                 wake_up_all(&tcon->ses->server->response_q);
 476                 msleep(1);
 477         }
 478
 479         return;
 480 }
 481
 482 #ifdef CONFIG_CIFS_STATS2
 483 static int cifs_show_stats(struct seq_file *s, struct dentry *root)
 484 {
 485         /* BB FIXME */
 486         return 0;
 487 }
 488 #endif
 489
 490 static int cifs_remount(struct super_block *sb, int *flags, char *data)
 491 {
 492         *flags |= MS_NODIRATIME;
 493         return 0;
 494 }
 495
 496 static int cifs_drop_inode(struct inode *inode)
 497 {
 498         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
 499
 500         /* no serverino => unconditional eviction */
 501         return !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) ||
 502                 generic_drop_inode(inode);
 503 }
 504
 505 static const struct super_operations cifs_super_ops = {
 506         .statfs = cifs_statfs,
 507         .alloc_inode = cifs_alloc_inode,
 508         .destroy_inode = cifs_destroy_inode,
 509         .drop_inode     = cifs_drop_inode,
 510         .evict_inode    = cifs_evict_inode,
 511 /*      .delete_inode   = cifs_delete_inode,  */  /* Do not need above
 512         function unless later we add lazy close of inodes or unless the
 513         kernel forgets to call us with the same number of releases (closes)
 514         as opens */
 515         .show_options = cifs_show_options,
 516         .umount_begin   = cifs_umount_begin,
 517         .remount_fs = cifs_remount,
 518 #ifdef CONFIG_CIFS_STATS2
 519         .show_stats = cifs_show_stats,
 520 #endif
 521 };
 522
 523 /*
 524  * Get root dentry from superblock according to prefix path mount option.
 525  * Return dentry with refcount + 1 on success and NULL otherwise.
 526  */
 527 static struct dentry *
 528 cifs_get_root(struct smb_vol *vol, struct super_block *sb)
 529 {
 530         struct dentry *dentry;
 531         struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
 532         char *full_path = NULL;
 533         char *s, *p;
 534         char sep;
 535
 536         full_path = cifs_build_path_to_root(vol, cifs_sb,
 537                                             cifs_sb_master_tcon(cifs_sb));
 538         if (full_path == NULL)
 539                 return ERR_PTR(-ENOMEM);
 540
 541         cFYI(1, "Get root dentry for %s", full_path);
 542
 543         sep = CIFS_DIR_SEP(cifs_sb);
 544         dentry = dget(sb->s_root);
 545         p = s = full_path;
 546
 547         do {
 548                 struct inode *dir = dentry->d_inode;
 549                 struct dentry *child;
 550
 551                 if (!dir) {
 552                         dput(dentry);
 553                         dentry = ERR_PTR(-ENOENT);
 554                         break;
 555                 }
 556
 557                 /* skip separators */
 558                 while (*s == sep)
 559                         s++;
 560                 if (!*s)
 561                         break;
 562                 p = s++;
 563                 /* next separator */
 564                 while (*s && *s != sep)
 565                         s++;
 566
 567                 mutex_lock(&dir->i_mutex);
 568                 child = lookup_one_len(p, dentry, s - p);
 569                 mutex_unlock(&dir->i_mutex);
 570                 dput(dentry);
 571                 dentry = child;
 572         } while (!IS_ERR(dentry));
 573         kfree(full_path);
 574         return dentry;
 575 }
 576
 577 static int cifs_set_super(struct super_block *sb, void *data)
 578 {
 579         struct cifs_mnt_data *mnt_data = data;
 580         sb->s_fs_info = mnt_data->cifs_sb;
 581         return set_anon_super(sb, NULL);
 582 }
 583
 584 static struct dentry *
 585 cifs_do_mount(struct file_system_type *fs_type,
 586               int flags, const char *dev_name, void *data)
 587 {
 588         int rc;
 589         struct super_block *sb;
 590         struct cifs_sb_info *cifs_sb;
 591         struct smb_vol *volume_info;
 592         struct cifs_mnt_data mnt_data;
 593         struct dentry *root;
 594
 595         cFYI(1, "Devname: %s flags: %d ", dev_name, flags);
 596
 597         volume_info = cifs_get_volume_info((char *)data, dev_name);
 598         if (IS_ERR(volume_info))
 599                 return ERR_CAST(volume_info);
 600
 601         cifs_sb = kzalloc(sizeof(struct cifs_sb_info), GFP_KERNEL);
 602         if (cifs_sb == NULL) {
 603                 root = ERR_PTR(-ENOMEM);
 604                 goto out_nls;
 605         }
 606
 607         cifs_sb->mountdata = kstrndup(data, PAGE_SIZE, GFP_KERNEL);
 608         if (cifs_sb->mountdata == NULL) {
 609                 root = ERR_PTR(-ENOMEM);
 610                 goto out_cifs_sb;
 611         }
 612
 613         cifs_setup_cifs_sb(volume_info, cifs_sb);
 614
 615         rc = cifs_mount(cifs_sb, volume_info);
 616         if (rc) {
 617                 if (!(flags & MS_SILENT))
 618                         cERROR(1, "cifs_mount failed w/return code = %d", rc);
 619                 root = ERR_PTR(rc);
 620                 goto out_mountdata;
 621         }
 622
 623         mnt_data.vol = volume_info;
 624         mnt_data.cifs_sb = cifs_sb;
 625         mnt_data.flags = flags;
 626
 627         sb = sget(fs_type, cifs_match_super, cifs_set_super, &mnt_data);
 628         if (IS_ERR(sb)) {
 629                 root = ERR_CAST(sb);
 630                 cifs_umount(cifs_sb);
 631                 goto out;
 632         }
 633
 634         if (sb->s_root) {
 635                 cFYI(1, "Use existing superblock");
 636                 cifs_umount(cifs_sb);
 637         } else {
 638                 sb->s_flags = flags;
 639                 /* BB should we make this contingent on mount parm? */
 640                 sb->s_flags |= MS_NODIRATIME | MS_NOATIME;
 641
 642                 rc = cifs_read_super(sb);
 643                 if (rc) {
 644                         root = ERR_PTR(rc);
 645                         goto out_super;
 646                 }
 647
 648                 sb->s_flags |= MS_ACTIVE;
 649         }
 650
 651         root = cifs_get_root(volume_info, sb);
 652         if (IS_ERR(root))
 653                 goto out_super;
 654
 655         cFYI(1, "dentry root is: %p", root);
 656         goto out;
 657
 658 out_super:
 659         deactivate_locked_super(sb);
 660 out:
 661         cifs_cleanup_volume_info(volume_info);
 662         return root;
 663
 664 out_mountdata:
 665         kfree(cifs_sb->mountdata);
 666 out_cifs_sb:
 667         kfree(cifs_sb);
 668 out_nls:
 669         unload_nls(volume_info->local_nls);
 670         goto out;
 671 }
 672
 673 static ssize_t cifs_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
 674                                    unsigned long nr_segs, loff_t pos)
 675 {
 676         struct inode *inode = iocb->ki_filp->f_path.dentry->d_inode;
 677         ssize_t written;
 678         int rc;
 679
 680         written = generic_file_aio_write(iocb, iov, nr_segs, pos);
 681
 682         if (CIFS_I(inode)->clientCanCacheAll)
 683                 return written;
 684
 685         rc = filemap_fdatawrite(inode->i_mapping);
 686         if (rc)
 687                 cFYI(1, "cifs_file_aio_write: %d rc on %p inode", rc, inode);
 688
 689         return written;
 690 }
 691
 692 static loff_t cifs_llseek(struct file *file, loff_t offset, int origin)
 693 {
 694         /*
 695          * origin == SEEK_END || SEEK_DATA || SEEK_HOLE => we must revalidate
 696          * the cached file length
 697          */
 698         if (origin != SEEK_SET || origin != SEEK_CUR) {
 699                 int rc;
 700                 struct inode *inode = file->f_path.dentry->d_inode;
 701
 702                 /*
 703                  * We need to be sure that all dirty pages are written and the
 704                  * server has the newest file length.
 705                  */
 706                 if (!CIFS_I(inode)->clientCanCacheRead && inode->i_mapping &&
 707                     inode->i_mapping->nrpages != 0) {
 708                         rc = filemap_fdatawait(inode->i_mapping);
 709                         if (rc) {
 710                                 mapping_set_error(inode->i_mapping, rc);
 711                                 return rc;
 712                         }
 713                 }
 714                 /*
 715                  * Some applications poll for the file length in this strange
 716                  * way so we must seek to end on non-oplocked files by
 717                  * setting the revalidate time to zero.
 718                  */
 719                 CIFS_I(inode)->time = 0;
 720
 721                 rc = cifs_revalidate_file_attr(file);
 722                 if (rc < 0)
 723                         return (loff_t)rc;
 724         }
 725         return generic_file_llseek(file, offset, origin);
 726 }
 727
 728 static int cifs_setlease(struct file *file, long arg, struct file_lock **lease)
 729 {
 730         /* note that this is called by vfs setlease with lock_flocks held
 731            to protect *lease from going away */
 732         struct inode *inode = file->f_path.dentry->d_inode;
 733         struct cifsFileInfo *cfile = file->private_data;
 734
 735         if (!(S_ISREG(inode->i_mode)))
 736                 return -EINVAL;
 737
 738         /* check if file is oplocked */
 739         if (((arg == F_RDLCK) &&
 740                 (CIFS_I(inode)->clientCanCacheRead)) ||
 741             ((arg == F_WRLCK) &&
 742                 (CIFS_I(inode)->clientCanCacheAll)))
 743                 return generic_setlease(file, arg, lease);
 744         else if (tlink_tcon(cfile->tlink)->local_lease &&
 745                  !CIFS_I(inode)->clientCanCacheRead)
 746                 /* If the server claims to support oplock on this
 747                    file, then we still need to check oplock even
 748                    if the local_lease mount option is set, but there
 749                    are servers which do not support oplock for which
 750                    this mount option may be useful if the user
 751                    knows that the file won't be changed on the server
 752                    by anyone else */
 753                 return generic_setlease(file, arg, lease);
 754         else
 755                 return -EAGAIN;
 756 }
 757
 758 struct file_system_type cifs_fs_type = {
 759         .owner = THIS_MODULE,
 760         .name = "cifs",
 761         .mount = cifs_do_mount,
 762         .kill_sb = cifs_kill_sb,
 763         /*  .fs_flags */
 764 };
 765 const struct inode_operations cifs_dir_inode_ops = {
 766         .create = cifs_create,
 767         .lookup = cifs_lookup,
 768         .getattr = cifs_getattr,
 769         .unlink = cifs_unlink,
 770         .link = cifs_hardlink,
 771         .mkdir = cifs_mkdir,
 772         .rmdir = cifs_rmdir,
 773         .rename = cifs_rename,
 774         .permission = cifs_permission,
 775 /*      revalidate:cifs_revalidate,   */
 776         .setattr = cifs_setattr,
 777         .symlink = cifs_symlink,
 778         .mknod   = cifs_mknod,
 779 #ifdef CONFIG_CIFS_XATTR
 780         .setxattr = cifs_setxattr,
 781         .getxattr = cifs_getxattr,
 782         .listxattr = cifs_listxattr,
 783         .removexattr = cifs_removexattr,
 784 #endif
 785 };
 786
 787 const struct inode_operations cifs_file_inode_ops = {
 788 /*      revalidate:cifs_revalidate, */
 789         .setattr = cifs_setattr,
 790         .getattr = cifs_getattr, /* do we need this anymore? */
 791         .rename = cifs_rename,
 792         .permission = cifs_permission,
 793 #ifdef CONFIG_CIFS_XATTR
 794         .setxattr = cifs_setxattr,
 795         .getxattr = cifs_getxattr,
 796         .listxattr = cifs_listxattr,
 797         .removexattr = cifs_removexattr,
 798 #endif
 799 };
 800
 801 const struct inode_operations cifs_symlink_inode_ops = {
 802         .readlink = generic_readlink,
 803         .follow_link = cifs_follow_link,
 804         .put_link = cifs_put_link,
 805         .permission = cifs_permission,
 806         /* BB add the following two eventually */
 807         /* revalidate: cifs_revalidate,
 808            setattr:    cifs_notify_change, *//* BB do we need notify change */
 809 #ifdef CONFIG_CIFS_XATTR
 810         .setxattr = cifs_setxattr,
 811         .getxattr = cifs_getxattr,
 812         .listxattr = cifs_listxattr,
 813         .removexattr = cifs_removexattr,
 814 #endif
 815 };
 816
 817 const struct file_operations cifs_file_ops = {
 818         .read = do_sync_read,
 819         .write = do_sync_write,
 820         .aio_read = generic_file_aio_read,
 821         .aio_write = cifs_file_aio_write,
 822         .open = cifs_open,
 823         .release = cifs_close,
 824         .lock = cifs_lock,
 825         .fsync = cifs_fsync,
 826         .flush = cifs_flush,
 827         .mmap  = cifs_file_mmap,
 828         .splice_read = generic_file_splice_read,
 829         .llseek = cifs_llseek,
 830 #ifdef CONFIG_CIFS_POSIX
 831         .unlocked_ioctl = cifs_ioctl,
 832 #endif /* CONFIG_CIFS_POSIX */
 833         .setlease = cifs_setlease,
 834 };
 835
 836 const struct file_operations cifs_file_strict_ops = {
 837         .read = do_sync_read,
 838         .write = do_sync_write,
 839         .aio_read = cifs_strict_readv,
 840         .aio_write = cifs_strict_writev,
 841         .open = cifs_open,
 842         .release = cifs_close,
 843         .lock = cifs_lock,
 844         .fsync = cifs_strict_fsync,
 845         .flush = cifs_flush,
 846         .mmap = cifs_file_strict_mmap,
 847         .splice_read = generic_file_splice_read,
 848         .llseek = cifs_llseek,
 849 #ifdef CONFIG_CIFS_POSIX
 850         .unlocked_ioctl = cifs_ioctl,
 851 #endif /* CONFIG_CIFS_POSIX */
 852         .setlease = cifs_setlease,
 853 };
 854
 855 const struct file_operations cifs_file_direct_ops = {
 856         /* BB reevaluate whether they can be done with directio, no cache */
 857         .read = do_sync_read,
 858         .write = do_sync_write,
 859         .aio_read = cifs_user_readv,
 860         .aio_write = cifs_user_writev,
 861         .open = cifs_open,
 862         .release = cifs_close,
 863         .lock = cifs_lock,
 864         .fsync = cifs_fsync,
 865         .flush = cifs_flush,
 866         .mmap = cifs_file_mmap,
 867         .splice_read = generic_file_splice_read,
 868 #ifdef CONFIG_CIFS_POSIX
 869         .unlocked_ioctl  = cifs_ioctl,
 870 #endif /* CONFIG_CIFS_POSIX */
 871         .llseek = cifs_llseek,
 872         .setlease = cifs_setlease,
 873 };
 874
 875 const struct file_operations cifs_file_nobrl_ops = {
 876         .read = do_sync_read,
 877         .write = do_sync_write,
 878         .aio_read = generic_file_aio_read,
 879         .aio_write = cifs_file_aio_write,
 880         .open = cifs_open,
 881         .release = cifs_close,
 882         .fsync = cifs_fsync,
 883         .flush = cifs_flush,
 884         .mmap  = cifs_file_mmap,
 885         .splice_read = generic_file_splice_read,
 886         .llseek = cifs_llseek,
 887 #ifdef CONFIG_CIFS_POSIX
 888         .unlocked_ioctl = cifs_ioctl,
 889 #endif /* CONFIG_CIFS_POSIX */
 890         .setlease = cifs_setlease,
 891 };
 892
 893 const struct file_operations cifs_file_strict_nobrl_ops = {
 894         .read = do_sync_read,
 895         .write = do_sync_write,
 896         .aio_read = cifs_strict_readv,
 897         .aio_write = cifs_strict_writev,
 898         .open = cifs_open,
 899         .release = cifs_close,
 900         .fsync = cifs_strict_fsync,
 901         .flush = cifs_flush,
 902         .mmap = cifs_file_strict_mmap,
 903         .splice_read = generic_file_splice_read,
 904         .llseek = cifs_llseek,
 905 #ifdef CONFIG_CIFS_POSIX
 906         .unlocked_ioctl = cifs_ioctl,
 907 #endif /* CONFIG_CIFS_POSIX */
 908         .setlease = cifs_setlease,
 909 };
 910
 911 const struct file_operations cifs_file_direct_nobrl_ops = {
 912         /* BB reevaluate whether they can be done with directio, no cache */
 913         .read = do_sync_read,
 914         .write = do_sync_write,
 915         .aio_read = cifs_user_readv,
 916         .aio_write = cifs_user_writev,
 917         .open = cifs_open,
 918         .release = cifs_close,
 919         .fsync = cifs_fsync,
 920         .flush = cifs_flush,
 921         .mmap = cifs_file_mmap,
 922         .splice_read = generic_file_splice_read,
 923 #ifdef CONFIG_CIFS_POSIX
 924         .unlocked_ioctl  = cifs_ioctl,
 925 #endif /* CONFIG_CIFS_POSIX */
 926         .llseek = cifs_llseek,
 927         .setlease = cifs_setlease,
 928 };
 929
 930 const struct file_operations cifs_dir_ops = {
 931         .readdir = cifs_readdir,
 932         .release = cifs_closedir,
 933         .read    = generic_read_dir,
 934         .unlocked_ioctl  = cifs_ioctl,
 935         .llseek = generic_file_llseek,
 936 };
 937
 938 static void
 939 cifs_init_once(void *inode)
 940 {
 941         struct cifsInodeInfo *cifsi = inode;
 942
 943         inode_init_once(&cifsi->vfs_inode);
 944         INIT_LIST_HEAD(&cifsi->llist);
 945         mutex_init(&cifsi->lock_mutex);
 946 }
 947
 948 static int
 949 cifs_init_inodecache(void)
 950 {
 951         cifs_inode_cachep = kmem_cache_create("cifs_inode_cache",
 952                                               sizeof(struct cifsInodeInfo),
 953                                               0, (SLAB_RECLAIM_ACCOUNT|
 954                                                 SLAB_MEM_SPREAD),
 955                                               cifs_init_once);
 956         if (cifs_inode_cachep == NULL)
 957                 return -ENOMEM;
 958
 959         return 0;
 960 }
 961
 962 static void
 963 cifs_destroy_inodecache(void)
 964 {
 965         kmem_cache_destroy(cifs_inode_cachep);
 966 }
 967
 968 static int
 969 cifs_init_request_bufs(void)
 970 {
 971         if (CIFSMaxBufSize < 8192) {
 972         /* Buffer size can not be smaller than 2 * PATH_MAX since maximum
 973         Unicode path name has to fit in any SMB/CIFS path based frames */
 974                 CIFSMaxBufSize = 8192;
 975         } else if (CIFSMaxBufSize > 1024*127) {
 976                 CIFSMaxBufSize = 1024 * 127;
 977         } else {
 978                 CIFSMaxBufSize &= 0x1FE00; /* Round size to even 512 byte mult*/
 979         }
 980 /*      cERROR(1, "CIFSMaxBufSize %d 0x%x",CIFSMaxBufSize,CIFSMaxBufSize); */
 981         cifs_req_cachep = kmem_cache_create("cifs_request",
 982                                             CIFSMaxBufSize +
 983                                             MAX_CIFS_HDR_SIZE, 0,
 984                                             SLAB_HWCACHE_ALIGN, NULL);
 985         if (cifs_req_cachep == NULL)
 986                 return -ENOMEM;
 987
 988         if (cifs_min_rcv < 1)
 989                 cifs_min_rcv = 1;
 990         else if (cifs_min_rcv > 64) {
 991                 cifs_min_rcv = 64;
 992                 cERROR(1, "cifs_min_rcv set to maximum (64)");
 993         }
 994
 995         cifs_req_poolp = mempool_create_slab_pool(cifs_min_rcv,
 996                                                   cifs_req_cachep);
 997
 998         if (cifs_req_poolp == NULL) {
 999                 kmem_cache_destroy(cifs_req_cachep);
1000                 return -ENOMEM;
1001         }
1002         /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and
1003         almost all handle based requests (but not write response, nor is it
1004         sufficient for path based requests).  A smaller size would have
1005         been more efficient (compacting multiple slab items on one 4k page)
1006         for the case in which debug was on, but this larger size allows
1007         more SMBs to use small buffer alloc and is still much more
1008         efficient to alloc 1 per page off the slab compared to 17K (5page)
1009         alloc of large cifs buffers even when page debugging is on */
1010         cifs_sm_req_cachep = kmem_cache_create("cifs_small_rq",
1011                         MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN,
1012                         NULL);
1013         if (cifs_sm_req_cachep == NULL) {
1014                 mempool_destroy(cifs_req_poolp);
1015                 kmem_cache_destroy(cifs_req_cachep);
1016                 return -ENOMEM;
1017         }
1018
1019         if (cifs_min_small < 2)
1020                 cifs_min_small = 2;
1021         else if (cifs_min_small > 256) {
1022                 cifs_min_small = 256;
1023                 cFYI(1, "cifs_min_small set to maximum (256)");
1024         }
1025
1026         cifs_sm_req_poolp = mempool_create_slab_pool(cifs_min_small,
1027                                                      cifs_sm_req_cachep);
1028
1029         if (cifs_sm_req_poolp == NULL) {
1030                 mempool_destroy(cifs_req_poolp);
1031                 kmem_cache_destroy(cifs_req_cachep);
1032                 kmem_cache_destroy(cifs_sm_req_cachep);
1033                 return -ENOMEM;
1034         }
1035
1036         return 0;
1037 }
1038
1039 static void
1040 cifs_destroy_request_bufs(void)
1041 {
1042         mempool_destroy(cifs_req_poolp);
1043         kmem_cache_destroy(cifs_req_cachep);
1044         mempool_destroy(cifs_sm_req_poolp);
1045         kmem_cache_destroy(cifs_sm_req_cachep);
1046 }
1047
1048 static int
1049 cifs_init_mids(void)
1050 {
1051         cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids",
1052                                             sizeof(struct mid_q_entry), 0,
1053                                             SLAB_HWCACHE_ALIGN, NULL);
1054         if (cifs_mid_cachep == NULL)
1055                 return -ENOMEM;
1056
1057         /* 3 is a reasonable minimum number of simultaneous operations */
1058         cifs_mid_poolp = mempool_create_slab_pool(3, cifs_mid_cachep);
1059         if (cifs_mid_poolp == NULL) {
1060                 kmem_cache_destroy(cifs_mid_cachep);
1061                 return -ENOMEM;
1062         }
1063
1064         return 0;
1065 }
1066
1067 static void
1068 cifs_destroy_mids(void)
1069 {
1070         mempool_destroy(cifs_mid_poolp);
1071         kmem_cache_destroy(cifs_mid_cachep);
1072 }
1073
1074 static int __init
1075 init_cifs(void)
1076 {
1077         int rc = 0;
1078         cifs_proc_init();
1079         INIT_LIST_HEAD(&cifs_tcp_ses_list);
1080 #ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
1081         INIT_LIST_HEAD(&GlobalDnotifyReqList);
1082         INIT_LIST_HEAD(&GlobalDnotifyRsp_Q);
1083 #endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
1084 /*
1085  *  Initialize Global counters
1086  */
1087         atomic_set(&sesInfoAllocCount, 0);
1088         atomic_set(&tconInfoAllocCount, 0);
1089         atomic_set(&tcpSesAllocCount, 0);
1090         atomic_set(&tcpSesReconnectCount, 0);
1091         atomic_set(&tconInfoReconnectCount, 0);
1092
1093         atomic_set(&bufAllocCount, 0);
1094         atomic_set(&smBufAllocCount, 0);
1095 #ifdef CONFIG_CIFS_STATS2
1096         atomic_set(&totBufAllocCount, 0);
1097         atomic_set(&totSmBufAllocCount, 0);
1098 #endif /* CONFIG_CIFS_STATS2 */
1099
1100         atomic_set(&midCount, 0);
1101         GlobalCurrentXid = 0;
1102         GlobalTotalActiveXid = 0;
1103         GlobalMaxActiveXid = 0;
1104         spin_lock_init(&cifs_tcp_ses_lock);
1105         spin_lock_init(&cifs_file_list_lock);
1106         spin_lock_init(&GlobalMid_Lock);
1107
1108         if (cifs_max_pending < 2) {
1109                 cifs_max_pending = 2;
1110                 cFYI(1, "cifs_max_pending set to min of 2");
1111         } else if (cifs_max_pending > CIFS_MAX_REQ) {
1112                 cifs_max_pending = CIFS_MAX_REQ;
1113                 cFYI(1, "cifs_max_pending set to max of %u", CIFS_MAX_REQ);
1114         }
1115
1116         cifsiod_wq = alloc_workqueue("cifsiod", WQ_FREEZABLE|WQ_MEM_RECLAIM, 0);
1117         if (!cifsiod_wq) {
1118                 rc = -ENOMEM;
1119                 goto out_clean_proc;
1120         }
1121
1122         rc = cifs_fscache_register();
1123         if (rc)
1124                 goto out_destroy_wq;
1125
1126         rc = cifs_init_inodecache();
1127         if (rc)
1128                 goto out_unreg_fscache;
1129
1130         rc = cifs_init_mids();
1131         if (rc)
1132                 goto out_destroy_inodecache;
1133
1134         rc = cifs_init_request_bufs();
1135         if (rc)
1136                 goto out_destroy_mids;
1137
1138 #ifdef CONFIG_CIFS_UPCALL
1139         rc = register_key_type(&cifs_spnego_key_type);
1140         if (rc)
1141                 goto out_destroy_request_bufs;
1142 #endif /* CONFIG_CIFS_UPCALL */
1143
1144 #ifdef CONFIG_CIFS_ACL
1145         rc = init_cifs_idmap();
1146         if (rc)
1147                 goto out_register_key_type;
1148 #endif /* CONFIG_CIFS_ACL */
1149
1150         rc = register_filesystem(&cifs_fs_type);
1151         if (rc)
1152                 goto out_init_cifs_idmap;
1153
1154         return 0;
1155
1156 out_init_cifs_idmap:
1157 #ifdef CONFIG_CIFS_ACL
1158         exit_cifs_idmap();
1159 out_register_key_type:
1160 #endif
1161 #ifdef CONFIG_CIFS_UPCALL
1162         unregister_key_type(&cifs_spnego_key_type);
1163 out_destroy_request_bufs:
1164 #endif
1165         cifs_destroy_request_bufs();
1166 out_destroy_mids:
1167         cifs_destroy_mids();
1168 out_destroy_inodecache:
1169         cifs_destroy_inodecache();
1170 out_unreg_fscache:
1171         cifs_fscache_unregister();
1172 out_destroy_wq:
1173         destroy_workqueue(cifsiod_wq);
1174 out_clean_proc:
1175         cifs_proc_clean();
1176         return rc;
1177 }
1178
1179 static void __exit
1180 exit_cifs(void)
1181 {
1182         cFYI(DBG2, "exit_cifs");
1183         unregister_filesystem(&cifs_fs_type);
1184         cifs_dfs_release_automount_timer();
1185 #ifdef CONFIG_CIFS_ACL
1186         cifs_destroy_idmaptrees();
1187         exit_cifs_idmap();
1188 #endif
1189 #ifdef CONFIG_CIFS_UPCALL
1190         unregister_key_type(&cifs_spnego_key_type);
1191 #endif
1192         cifs_destroy_request_bufs();
1193         cifs_destroy_mids();
1194         cifs_destroy_inodecache();
1195         cifs_fscache_unregister();
1196         destroy_workqueue(cifsiod_wq);
1197         cifs_proc_clean();
1198 }
1199
1200 MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>");
1201 MODULE_LICENSE("GPL");  /* combination of LGPL + GPL source behaves as GPL */
1202 MODULE_DESCRIPTION
1203     ("VFS to access servers complying with the SNIA CIFS Specification "
1204      "e.g. Samba and Windows");
1205 MODULE_VERSION(CIFS_VERSION);
1206 module_init(init_cifs)
1207 module_exit(exit_cifs)