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 <linux/random.h> 40#include <net/ipv6.h> 41#include "cifsfs.h" 42#include "cifspdu.h" 43#define DECLARE_GLOBALS_HERE 44#include "cifsglob.h" 45#include "cifsproto.h" 46#include "cifs_debug.h" 47#include "cifs_fs_sb.h" 48#include <linux/mm.h> 49#include <linux/key-type.h> 50#include "cifs_spnego.h" 51#include "fscache.h" 52#ifdef CONFIG_CIFS_SMB2 53#include "smb2pdu.h" 54#endif 55 56int cifsFYI = 0; 57int traceSMB = 0; 58bool enable_oplocks = true; 59unsigned int linuxExtEnabled = 1; 60unsigned int lookupCacheEnabled = 1; 61unsigned int global_secflags = CIFSSEC_DEF; 62/* unsigned int ntlmv2_support = 0; */ 63unsigned int sign_CIFS_PDUs = 1; 64static const struct super_operations cifs_super_ops; 65unsigned int CIFSMaxBufSize = CIFS_MAX_MSGSIZE; 66module_param(CIFSMaxBufSize, uint, 0); 67MODULE_PARM_DESC(CIFSMaxBufSize, "Network buffer size (not including header). " 68 "Default: 16384 Range: 8192 to 130048"); 69unsigned int cifs_min_rcv = CIFS_MIN_RCV_POOL; 70module_param(cifs_min_rcv, uint, 0); 71MODULE_PARM_DESC(cifs_min_rcv, "Network buffers in pool. Default: 4 Range: " 72 "1 to 64"); 73unsigned int cifs_min_small = 30; 74module_param(cifs_min_small, uint, 0); 75MODULE_PARM_DESC(cifs_min_small, "Small network buffers in pool. Default: 30 " 76 "Range: 2 to 256"); 77unsigned int cifs_max_pending = CIFS_MAX_REQ; 78module_param(cifs_max_pending, uint, 0444); 79MODULE_PARM_DESC(cifs_max_pending, "Simultaneous requests to server. " 80 "Default: 32767 Range: 2 to 32767."); 81module_param(enable_oplocks, bool, 0644); 82MODULE_PARM_DESC(enable_oplocks, "Enable or disable oplocks. Default: y/Y/1"); 83 84extern mempool_t *cifs_sm_req_poolp; 85extern mempool_t *cifs_req_poolp; 86extern mempool_t *cifs_mid_poolp; 87 88struct workqueue_struct *cifsiod_wq; 89 90/* 91 * Bumps refcount for cifs super block. 92 * Note that it should be only called if a referece to VFS super block is 93 * already held, e.g. in open-type syscalls context. Otherwise it can race with 94 * atomic_dec_and_test in deactivate_locked_super. 95 */ 96void 97cifs_sb_active(struct super_block *sb) 98{ 99 struct cifs_sb_info *server = CIFS_SB(sb); 100 101 if (atomic_inc_return(&server->active) == 1) 102 atomic_inc(&sb->s_active); 103} 104 105void 106cifs_sb_deactive(struct super_block *sb) 107{ 108 struct cifs_sb_info *server = CIFS_SB(sb); 109 110 if (atomic_dec_and_test(&server->active)) 111 deactivate_super(sb); 112} 113 114static int 115cifs_read_super(struct super_block *sb) 116{ 117 struct inode *inode; 118 struct cifs_sb_info *cifs_sb; 119 struct cifs_tcon *tcon; 120 int rc = 0; 121 122 cifs_sb = CIFS_SB(sb); 123 tcon = cifs_sb_master_tcon(cifs_sb); 124 125 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIXACL) 126 sb->s_flags |= MS_POSIXACL; 127 128 if (tcon->ses->capabilities & tcon->ses->server->vals->cap_large_files) 129 sb->s_maxbytes = MAX_LFS_FILESIZE; 130 else 131 sb->s_maxbytes = MAX_NON_LFS; 132 133 /* BB FIXME fix time_gran to be larger for LANMAN sessions */ 134 sb->s_time_gran = 100; 135 136 sb->s_magic = CIFS_MAGIC_NUMBER; 137 sb->s_op = &cifs_super_ops; 138 sb->s_bdi = &cifs_sb->bdi; 139 sb->s_blocksize = CIFS_MAX_MSGSIZE; 140 sb->s_blocksize_bits = 14; /* default 2**14 = CIFS_MAX_MSGSIZE */ 141 inode = cifs_root_iget(sb); 142 143 if (IS_ERR(inode)) { 144 rc = PTR_ERR(inode); 145 goto out_no_root; 146 } 147 148 if (tcon->nocase) 149 sb->s_d_op = &cifs_ci_dentry_ops; 150 else 151 sb->s_d_op = &cifs_dentry_ops; 152 153 sb->s_root = d_make_root(inode); 154 if (!sb->s_root) { 155 rc = -ENOMEM; 156 goto out_no_root; 157 } 158 159#ifdef CONFIG_CIFS_NFSD_EXPORT 160 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { 161 cifs_dbg(FYI, "export ops supported\n"); 162 sb->s_export_op = &cifs_export_ops; 163 } 164#endif /* CONFIG_CIFS_NFSD_EXPORT */ 165 166 return 0; 167 168out_no_root: 169 cifs_dbg(VFS, "%s: get root inode failed\n", __func__); 170 return rc; 171} 172 173static void cifs_kill_sb(struct super_block *sb) 174{ 175 struct cifs_sb_info *cifs_sb = CIFS_SB(sb); 176 kill_anon_super(sb); 177 cifs_umount(cifs_sb); 178} 179 180static int 181cifs_statfs(struct dentry *dentry, struct kstatfs *buf) 182{ 183 struct super_block *sb = dentry->d_sb; 184 struct cifs_sb_info *cifs_sb = CIFS_SB(sb); 185 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); 186 struct TCP_Server_Info *server = tcon->ses->server; 187 unsigned int xid; 188 int rc = 0; 189 190 xid = get_xid(); 191 192 /* 193 * PATH_MAX may be too long - it would presumably be total path, 194 * but note that some servers (includinng Samba 3) have a shorter 195 * maximum path. 196 * 197 * Instead could get the real value via SMB_QUERY_FS_ATTRIBUTE_INFO. 198 */ 199 buf->f_namelen = PATH_MAX; 200 buf->f_files = 0; /* undefined */ 201 buf->f_ffree = 0; /* unlimited */ 202 203 if (server->ops->queryfs) 204 rc = server->ops->queryfs(xid, tcon, buf); 205 206 free_xid(xid); 207 return 0; 208} 209 210static long cifs_fallocate(struct file *file, int mode, loff_t off, loff_t len) 211{ 212 struct cifs_sb_info *cifs_sb = CIFS_FILE_SB(file); 213 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); 214 struct TCP_Server_Info *server = tcon->ses->server; 215 216 if (server->ops->fallocate) 217 return server->ops->fallocate(file, tcon, mode, off, len); 218 219 return -EOPNOTSUPP; 220} 221 222static int cifs_permission(struct inode *inode, int mask) 223{ 224 struct cifs_sb_info *cifs_sb; 225 226 cifs_sb = CIFS_SB(inode->i_sb); 227 228 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) { 229 if ((mask & MAY_EXEC) && !execute_ok(inode)) 230 return -EACCES; 231 else 232 return 0; 233 } else /* file mode might have been restricted at mount time 234 on the client (above and beyond ACL on servers) for 235 servers which do not support setting and viewing mode bits, 236 so allowing client to check permissions is useful */ 237 return generic_permission(inode, mask); 238} 239 240static struct kmem_cache *cifs_inode_cachep; 241static struct kmem_cache *cifs_req_cachep; 242static struct kmem_cache *cifs_mid_cachep; 243static struct kmem_cache *cifs_sm_req_cachep; 244mempool_t *cifs_sm_req_poolp; 245mempool_t *cifs_req_poolp; 246mempool_t *cifs_mid_poolp; 247 248static struct inode * 249cifs_alloc_inode(struct super_block *sb) 250{ 251 struct cifsInodeInfo *cifs_inode; 252 cifs_inode = kmem_cache_alloc(cifs_inode_cachep, GFP_KERNEL); 253 if (!cifs_inode) 254 return NULL; 255 cifs_inode->cifsAttrs = 0x20; /* default */ 256 cifs_inode->time = 0; 257 /* 258 * Until the file is open and we have gotten oplock info back from the 259 * server, can not assume caching of file data or metadata. 260 */ 261 cifs_set_oplock_level(cifs_inode, 0); 262 cifs_inode->flags = 0; 263 spin_lock_init(&cifs_inode->writers_lock); 264 cifs_inode->writers = 0; 265 cifs_inode->vfs_inode.i_blkbits = 14; /* 2**14 = CIFS_MAX_MSGSIZE */ 266 cifs_inode->server_eof = 0; 267 cifs_inode->uniqueid = 0; 268 cifs_inode->createtime = 0; 269 cifs_inode->epoch = 0; 270#ifdef CONFIG_CIFS_SMB2 271 get_random_bytes(cifs_inode->lease_key, SMB2_LEASE_KEY_SIZE); 272#endif 273 /* 274 * Can not set i_flags here - they get immediately overwritten to zero 275 * by the VFS. 276 */ 277 /* cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME; */ 278 INIT_LIST_HEAD(&cifs_inode->openFileList); 279 INIT_LIST_HEAD(&cifs_inode->llist); 280 return &cifs_inode->vfs_inode; 281} 282 283static void cifs_i_callback(struct rcu_head *head) 284{ 285 struct inode *inode = container_of(head, struct inode, i_rcu); 286 kmem_cache_free(cifs_inode_cachep, CIFS_I(inode)); 287} 288 289static void 290cifs_destroy_inode(struct inode *inode) 291{ 292 call_rcu(&inode->i_rcu, cifs_i_callback); 293} 294 295static void 296cifs_evict_inode(struct inode *inode) 297{ 298 truncate_inode_pages_final(&inode->i_data); 299 clear_inode(inode); 300 cifs_fscache_release_inode_cookie(inode); 301} 302 303static void 304cifs_show_address(struct seq_file *s, struct TCP_Server_Info *server) 305{ 306 struct sockaddr_in *sa = (struct sockaddr_in *) &server->dstaddr; 307 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *) &server->dstaddr; 308 309 seq_puts(s, ",addr="); 310 311 switch (server->dstaddr.ss_family) { 312 case AF_INET: 313 seq_printf(s, "%pI4", &sa->sin_addr.s_addr); 314 break; 315 case AF_INET6: 316 seq_printf(s, "%pI6", &sa6->sin6_addr.s6_addr); 317 if (sa6->sin6_scope_id) 318 seq_printf(s, "%%%u", sa6->sin6_scope_id); 319 break; 320 default: 321 seq_puts(s, "(unknown)"); 322 } 323} 324 325static void 326cifs_show_security(struct seq_file *s, struct cifs_ses *ses) 327{ 328 if (ses->sectype == Unspecified) 329 return; 330 331 seq_puts(s, ",sec="); 332 333 switch (ses->sectype) { 334 case LANMAN: 335 seq_puts(s, "lanman"); 336 break; 337 case NTLMv2: 338 seq_puts(s, "ntlmv2"); 339 break; 340 case NTLM: 341 seq_puts(s, "ntlm"); 342 break; 343 case Kerberos: 344 seq_puts(s, "krb5"); 345 break; 346 case RawNTLMSSP: 347 seq_puts(s, "ntlmssp"); 348 break; 349 default: 350 /* shouldn't ever happen */ 351 seq_puts(s, "unknown"); 352 break; 353 } 354 355 if (ses->sign) 356 seq_puts(s, "i"); 357} 358 359static void 360cifs_show_cache_flavor(struct seq_file *s, struct cifs_sb_info *cifs_sb) 361{ 362 seq_puts(s, ",cache="); 363 364 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_STRICT_IO) 365 seq_puts(s, "strict"); 366 else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) 367 seq_puts(s, "none"); 368 else 369 seq_puts(s, "loose"); 370} 371 372static void 373cifs_show_nls(struct seq_file *s, struct nls_table *cur) 374{ 375 struct nls_table *def; 376 377 /* Display iocharset= option if it's not default charset */ 378 def = load_nls_default(); 379 if (def != cur) 380 seq_printf(s, ",iocharset=%s", cur->charset); 381 unload_nls(def); 382} 383 384/* 385 * cifs_show_options() is for displaying mount options in /proc/mounts. 386 * Not all settable options are displayed but most of the important 387 * ones are. 388 */ 389static int 390cifs_show_options(struct seq_file *s, struct dentry *root) 391{ 392 struct cifs_sb_info *cifs_sb = CIFS_SB(root->d_sb); 393 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); 394 struct sockaddr *srcaddr; 395 srcaddr = (struct sockaddr *)&tcon->ses->server->srcaddr; 396 397 seq_show_option(s, "vers", tcon->ses->server->vals->version_string); 398 cifs_show_security(s, tcon->ses); 399 cifs_show_cache_flavor(s, cifs_sb); 400 401 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER) 402 seq_puts(s, ",multiuser"); 403 else if (tcon->ses->user_name) 404 seq_show_option(s, "username", tcon->ses->user_name); 405 406 if (tcon->ses->domainName) 407 seq_show_option(s, "domain", tcon->ses->domainName); 408 409 if (srcaddr->sa_family != AF_UNSPEC) { 410 struct sockaddr_in *saddr4; 411 struct sockaddr_in6 *saddr6; 412 saddr4 = (struct sockaddr_in *)srcaddr; 413 saddr6 = (struct sockaddr_in6 *)srcaddr; 414 if (srcaddr->sa_family == AF_INET6) 415 seq_printf(s, ",srcaddr=%pI6c", 416 &saddr6->sin6_addr); 417 else if (srcaddr->sa_family == AF_INET) 418 seq_printf(s, ",srcaddr=%pI4", 419 &saddr4->sin_addr.s_addr); 420 else 421 seq_printf(s, ",srcaddr=BAD-AF:%i", 422 (int)(srcaddr->sa_family)); 423 } 424 425 seq_printf(s, ",uid=%u", 426 from_kuid_munged(&init_user_ns, cifs_sb->mnt_uid)); 427 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID) 428 seq_puts(s, ",forceuid"); 429 else 430 seq_puts(s, ",noforceuid"); 431 432 seq_printf(s, ",gid=%u", 433 from_kgid_munged(&init_user_ns, cifs_sb->mnt_gid)); 434 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID) 435 seq_puts(s, ",forcegid"); 436 else 437 seq_puts(s, ",noforcegid"); 438 439 cifs_show_address(s, tcon->ses->server); 440 441 if (!tcon->unix_ext) 442 seq_printf(s, ",file_mode=0%ho,dir_mode=0%ho", 443 cifs_sb->mnt_file_mode, 444 cifs_sb->mnt_dir_mode); 445 446 cifs_show_nls(s, cifs_sb->local_nls); 447 448 if (tcon->seal) 449 seq_puts(s, ",seal"); 450 if (tcon->nocase) 451 seq_puts(s, ",nocase"); 452 if (tcon->retry) 453 seq_puts(s, ",hard"); 454 if (tcon->unix_ext) 455 seq_puts(s, ",unix"); 456 else 457 seq_puts(s, ",nounix"); 458 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) 459 seq_puts(s, ",posixpaths"); 460 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) 461 seq_puts(s, ",setuids"); 462 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) 463 seq_puts(s, ",serverino"); 464 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RWPIDFORWARD) 465 seq_puts(s, ",rwpidforward"); 466 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL) 467 seq_puts(s, ",forcemand"); 468 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR) 469 seq_puts(s, ",nouser_xattr"); 470 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR) 471 seq_puts(s, ",mapchars"); 472 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SFM_CHR) 473 seq_puts(s, ",mapposix"); 474 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) 475 seq_puts(s, ",sfu"); 476 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) 477 seq_puts(s, ",nobrl"); 478 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) 479 seq_puts(s, ",cifsacl"); 480 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) 481 seq_puts(s, ",dynperm"); 482 if (root->d_sb->s_flags & MS_POSIXACL) 483 seq_puts(s, ",acl"); 484 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) 485 seq_puts(s, ",mfsymlinks"); 486 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_FSCACHE) 487 seq_puts(s, ",fsc"); 488 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOSSYNC) 489 seq_puts(s, ",nostrictsync"); 490 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) 491 seq_puts(s, ",noperm"); 492 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_BACKUPUID) 493 seq_printf(s, ",backupuid=%u", 494 from_kuid_munged(&init_user_ns, 495 cifs_sb->mnt_backupuid)); 496 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_BACKUPGID) 497 seq_printf(s, ",backupgid=%u", 498 from_kgid_munged(&init_user_ns, 499 cifs_sb->mnt_backupgid)); 500 501 seq_printf(s, ",rsize=%u", cifs_sb->rsize); 502 seq_printf(s, ",wsize=%u", cifs_sb->wsize); 503 /* convert actimeo and display it in seconds */ 504 seq_printf(s, ",actimeo=%lu", cifs_sb->actimeo / HZ); 505 506 return 0; 507} 508 509static void cifs_umount_begin(struct super_block *sb) 510{ 511 struct cifs_sb_info *cifs_sb = CIFS_SB(sb); 512 struct cifs_tcon *tcon; 513 514 if (cifs_sb == NULL) 515 return; 516 517 tcon = cifs_sb_master_tcon(cifs_sb); 518 519 spin_lock(&cifs_tcp_ses_lock); 520 if ((tcon->tc_count > 1) || (tcon->tidStatus == CifsExiting)) { 521 /* we have other mounts to same share or we have 522 already tried to force umount this and woken up 523 all waiting network requests, nothing to do */ 524 spin_unlock(&cifs_tcp_ses_lock); 525 return; 526 } else if (tcon->tc_count == 1) 527 tcon->tidStatus = CifsExiting; 528 spin_unlock(&cifs_tcp_ses_lock); 529 530 /* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */ 531 /* cancel_notify_requests(tcon); */ 532 if (tcon->ses && tcon->ses->server) { 533 cifs_dbg(FYI, "wake up tasks now - umount begin not complete\n"); 534 wake_up_all(&tcon->ses->server->request_q); 535 wake_up_all(&tcon->ses->server->response_q); 536 msleep(1); /* yield */ 537 /* we have to kick the requests once more */ 538 wake_up_all(&tcon->ses->server->response_q); 539 msleep(1); 540 } 541 542 return; 543} 544 545#ifdef CONFIG_CIFS_STATS2 546static int cifs_show_stats(struct seq_file *s, struct dentry *root) 547{ 548 /* BB FIXME */ 549 return 0; 550} 551#endif 552 553static int cifs_remount(struct super_block *sb, int *flags, char *data) 554{ 555 sync_filesystem(sb); 556 *flags |= MS_NODIRATIME; 557 return 0; 558} 559 560static int cifs_drop_inode(struct inode *inode) 561{ 562 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 563 564 /* no serverino => unconditional eviction */ 565 return !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) || 566 generic_drop_inode(inode); 567} 568 569static const struct super_operations cifs_super_ops = { 570 .statfs = cifs_statfs, 571 .alloc_inode = cifs_alloc_inode, 572 .destroy_inode = cifs_destroy_inode, 573 .drop_inode = cifs_drop_inode, 574 .evict_inode = cifs_evict_inode, 575/* .delete_inode = cifs_delete_inode, */ /* Do not need above 576 function unless later we add lazy close of inodes or unless the 577 kernel forgets to call us with the same number of releases (closes) 578 as opens */ 579 .show_options = cifs_show_options, 580 .umount_begin = cifs_umount_begin, 581 .remount_fs = cifs_remount, 582#ifdef CONFIG_CIFS_STATS2 583 .show_stats = cifs_show_stats, 584#endif 585}; 586 587/* 588 * Get root dentry from superblock according to prefix path mount option. 589 * Return dentry with refcount + 1 on success and NULL otherwise. 590 */ 591static struct dentry * 592cifs_get_root(struct smb_vol *vol, struct super_block *sb) 593{ 594 struct dentry *dentry; 595 struct cifs_sb_info *cifs_sb = CIFS_SB(sb); 596 char *full_path = NULL; 597 char *s, *p; 598 char sep; 599 600 full_path = cifs_build_path_to_root(vol, cifs_sb, 601 cifs_sb_master_tcon(cifs_sb)); 602 if (full_path == NULL) 603 return ERR_PTR(-ENOMEM); 604 605 cifs_dbg(FYI, "Get root dentry for %s\n", full_path); 606 607 sep = CIFS_DIR_SEP(cifs_sb); 608 dentry = dget(sb->s_root); 609 p = s = full_path; 610 611 do { 612 struct inode *dir = d_inode(dentry); 613 struct dentry *child; 614 615 if (!dir) { 616 dput(dentry); 617 dentry = ERR_PTR(-ENOENT); 618 break; 619 } 620 if (!S_ISDIR(dir->i_mode)) { 621 dput(dentry); 622 dentry = ERR_PTR(-ENOTDIR); 623 break; 624 } 625 626 /* skip separators */ 627 while (*s == sep) 628 s++; 629 if (!*s) 630 break; 631 p = s++; 632 /* next separator */ 633 while (*s && *s != sep) 634 s++; 635 636 mutex_lock(&dir->i_mutex); 637 child = lookup_one_len(p, dentry, s - p); 638 mutex_unlock(&dir->i_mutex); 639 dput(dentry); 640 dentry = child; 641 } while (!IS_ERR(dentry)); 642 kfree(full_path); 643 return dentry; 644} 645 646static int cifs_set_super(struct super_block *sb, void *data) 647{ 648 struct cifs_mnt_data *mnt_data = data; 649 sb->s_fs_info = mnt_data->cifs_sb; 650 return set_anon_super(sb, NULL); 651} 652 653static struct dentry * 654cifs_do_mount(struct file_system_type *fs_type, 655 int flags, const char *dev_name, void *data) 656{ 657 int rc; 658 struct super_block *sb; 659 struct cifs_sb_info *cifs_sb; 660 struct smb_vol *volume_info; 661 struct cifs_mnt_data mnt_data; 662 struct dentry *root; 663 664 cifs_dbg(FYI, "Devname: %s flags: %d\n", dev_name, flags); 665 666 volume_info = cifs_get_volume_info((char *)data, dev_name); 667 if (IS_ERR(volume_info)) 668 return ERR_CAST(volume_info); 669 670 cifs_sb = kzalloc(sizeof(struct cifs_sb_info), GFP_KERNEL); 671 if (cifs_sb == NULL) { 672 root = ERR_PTR(-ENOMEM); 673 goto out_nls; 674 } 675 676 cifs_sb->mountdata = kstrndup(data, PAGE_SIZE, GFP_KERNEL); 677 if (cifs_sb->mountdata == NULL) { 678 root = ERR_PTR(-ENOMEM); 679 goto out_cifs_sb; 680 } 681 682 cifs_setup_cifs_sb(volume_info, cifs_sb); 683 684 rc = cifs_mount(cifs_sb, volume_info); 685 if (rc) { 686 if (!(flags & MS_SILENT)) 687 cifs_dbg(VFS, "cifs_mount failed w/return code = %d\n", 688 rc); 689 root = ERR_PTR(rc); 690 goto out_mountdata; 691 } 692 693 mnt_data.vol = volume_info; 694 mnt_data.cifs_sb = cifs_sb; 695 mnt_data.flags = flags; 696 697 /* BB should we make this contingent on mount parm? */ 698 flags |= MS_NODIRATIME | MS_NOATIME; 699 700 sb = sget(fs_type, cifs_match_super, cifs_set_super, flags, &mnt_data); 701 if (IS_ERR(sb)) { 702 root = ERR_CAST(sb); 703 cifs_umount(cifs_sb); 704 goto out; 705 } 706 707 if (sb->s_root) { 708 cifs_dbg(FYI, "Use existing superblock\n"); 709 cifs_umount(cifs_sb); 710 } else { 711 rc = cifs_read_super(sb); 712 if (rc) { 713 root = ERR_PTR(rc); 714 goto out_super; 715 } 716 717 sb->s_flags |= MS_ACTIVE; 718 } 719 720 root = cifs_get_root(volume_info, sb); 721 if (IS_ERR(root)) 722 goto out_super; 723 724 cifs_dbg(FYI, "dentry root is: %p\n", root); 725 goto out; 726 727out_super: 728 deactivate_locked_super(sb); 729out: 730 cifs_cleanup_volume_info(volume_info); 731 return root; 732 733out_mountdata: 734 kfree(cifs_sb->mountdata); 735out_cifs_sb: 736 kfree(cifs_sb); 737out_nls: 738 unload_nls(volume_info->local_nls); 739 goto out; 740} 741 742static ssize_t 743cifs_loose_read_iter(struct kiocb *iocb, struct iov_iter *iter) 744{ 745 ssize_t rc; 746 struct inode *inode = file_inode(iocb->ki_filp); 747 748 rc = cifs_revalidate_mapping(inode); 749 if (rc) 750 return rc; 751 752 return generic_file_read_iter(iocb, iter); 753} 754 755static ssize_t cifs_file_write_iter(struct kiocb *iocb, struct iov_iter *from) 756{ 757 struct inode *inode = file_inode(iocb->ki_filp); 758 struct cifsInodeInfo *cinode = CIFS_I(inode); 759 ssize_t written; 760 int rc; 761 762 written = cifs_get_writer(cinode); 763 if (written) 764 return written; 765 766 written = generic_file_write_iter(iocb, from); 767 768 if (CIFS_CACHE_WRITE(CIFS_I(inode))) 769 goto out; 770 771 rc = filemap_fdatawrite(inode->i_mapping); 772 if (rc) 773 cifs_dbg(FYI, "cifs_file_write_iter: %d rc on %p inode\n", 774 rc, inode); 775 776out: 777 cifs_put_writer(cinode); 778 return written; 779} 780 781static loff_t cifs_llseek(struct file *file, loff_t offset, int whence) 782{ 783 /* 784 * whence == SEEK_END || SEEK_DATA || SEEK_HOLE => we must revalidate 785 * the cached file length 786 */ 787 if (whence != SEEK_SET && whence != SEEK_CUR) { 788 int rc; 789 struct inode *inode = file_inode(file); 790 791 /* 792 * We need to be sure that all dirty pages are written and the 793 * server has the newest file length. 794 */ 795 if (!CIFS_CACHE_READ(CIFS_I(inode)) && inode->i_mapping && 796 inode->i_mapping->nrpages != 0) { 797 rc = filemap_fdatawait(inode->i_mapping); 798 if (rc) { 799 mapping_set_error(inode->i_mapping, rc); 800 return rc; 801 } 802 } 803 /* 804 * Some applications poll for the file length in this strange 805 * way so we must seek to end on non-oplocked files by 806 * setting the revalidate time to zero. 807 */ 808 CIFS_I(inode)->time = 0; 809 810 rc = cifs_revalidate_file_attr(file); 811 if (rc < 0) 812 return (loff_t)rc; 813 } 814 return generic_file_llseek(file, offset, whence); 815} 816 817static int 818cifs_setlease(struct file *file, long arg, struct file_lock **lease, void **priv) 819{ 820 /* 821 * Note that this is called by vfs setlease with i_lock held to 822 * protect *lease from going away. 823 */ 824 struct inode *inode = file_inode(file); 825 struct cifsFileInfo *cfile = file->private_data; 826 827 if (!(S_ISREG(inode->i_mode))) 828 return -EINVAL; 829 830 /* Check if file is oplocked if this is request for new lease */ 831 if (arg == F_UNLCK || 832 ((arg == F_RDLCK) && CIFS_CACHE_READ(CIFS_I(inode))) || 833 ((arg == F_WRLCK) && CIFS_CACHE_WRITE(CIFS_I(inode)))) 834 return generic_setlease(file, arg, lease, priv); 835 else if (tlink_tcon(cfile->tlink)->local_lease && 836 !CIFS_CACHE_READ(CIFS_I(inode))) 837 /* 838 * If the server claims to support oplock on this file, then we 839 * still need to check oplock even if the local_lease mount 840 * option is set, but there are servers which do not support 841 * oplock for which this mount option may be useful if the user 842 * knows that the file won't be changed on the server by anyone 843 * else. 844 */ 845 return generic_setlease(file, arg, lease, priv); 846 else 847 return -EAGAIN; 848} 849 850struct file_system_type cifs_fs_type = { 851 .owner = THIS_MODULE, 852 .name = "cifs", 853 .mount = cifs_do_mount, 854 .kill_sb = cifs_kill_sb, 855 /* .fs_flags */ 856}; 857MODULE_ALIAS_FS("cifs"); 858const struct inode_operations cifs_dir_inode_ops = { 859 .create = cifs_create, 860 .atomic_open = cifs_atomic_open, 861 .lookup = cifs_lookup, 862 .getattr = cifs_getattr, 863 .unlink = cifs_unlink, 864 .link = cifs_hardlink, 865 .mkdir = cifs_mkdir, 866 .rmdir = cifs_rmdir, 867 .rename2 = cifs_rename2, 868 .permission = cifs_permission, 869/* revalidate:cifs_revalidate, */ 870 .setattr = cifs_setattr, 871 .symlink = cifs_symlink, 872 .mknod = cifs_mknod, 873#ifdef CONFIG_CIFS_XATTR 874 .setxattr = cifs_setxattr, 875 .getxattr = cifs_getxattr, 876 .listxattr = cifs_listxattr, 877 .removexattr = cifs_removexattr, 878#endif 879}; 880 881const struct inode_operations cifs_file_inode_ops = { 882/* revalidate:cifs_revalidate, */ 883 .setattr = cifs_setattr, 884 .getattr = cifs_getattr, /* do we need this anymore? */ 885 .permission = cifs_permission, 886#ifdef CONFIG_CIFS_XATTR 887 .setxattr = cifs_setxattr, 888 .getxattr = cifs_getxattr, 889 .listxattr = cifs_listxattr, 890 .removexattr = cifs_removexattr, 891#endif 892}; 893 894const struct inode_operations cifs_symlink_inode_ops = { 895 .readlink = generic_readlink, 896 .follow_link = cifs_follow_link, 897 .put_link = kfree_put_link, 898 .permission = cifs_permission, 899 /* BB add the following two eventually */ 900 /* revalidate: cifs_revalidate, 901 setattr: cifs_notify_change, *//* BB do we need notify change */ 902#ifdef CONFIG_CIFS_XATTR 903 .setxattr = cifs_setxattr, 904 .getxattr = cifs_getxattr, 905 .listxattr = cifs_listxattr, 906 .removexattr = cifs_removexattr, 907#endif 908}; 909 910const struct file_operations cifs_file_ops = { 911 .read_iter = cifs_loose_read_iter, 912 .write_iter = cifs_file_write_iter, 913 .open = cifs_open, 914 .release = cifs_close, 915 .lock = cifs_lock, 916 .fsync = cifs_fsync, 917 .flush = cifs_flush, 918 .mmap = cifs_file_mmap, 919 .splice_read = generic_file_splice_read, 920 .llseek = cifs_llseek, 921#ifdef CONFIG_CIFS_POSIX 922 .unlocked_ioctl = cifs_ioctl, 923#endif /* CONFIG_CIFS_POSIX */ 924 .setlease = cifs_setlease, 925 .fallocate = cifs_fallocate, 926}; 927 928const struct file_operations cifs_file_strict_ops = { 929 .read_iter = cifs_strict_readv, 930 .write_iter = cifs_strict_writev, 931 .open = cifs_open, 932 .release = cifs_close, 933 .lock = cifs_lock, 934 .fsync = cifs_strict_fsync, 935 .flush = cifs_flush, 936 .mmap = cifs_file_strict_mmap, 937 .splice_read = generic_file_splice_read, 938 .llseek = cifs_llseek, 939#ifdef CONFIG_CIFS_POSIX 940 .unlocked_ioctl = cifs_ioctl, 941#endif /* CONFIG_CIFS_POSIX */ 942 .setlease = cifs_setlease, 943 .fallocate = cifs_fallocate, 944}; 945 946const struct file_operations cifs_file_direct_ops = { 947 /* BB reevaluate whether they can be done with directio, no cache */ 948 .read_iter = cifs_user_readv, 949 .write_iter = cifs_user_writev, 950 .open = cifs_open, 951 .release = cifs_close, 952 .lock = cifs_lock, 953 .fsync = cifs_fsync, 954 .flush = cifs_flush, 955 .mmap = cifs_file_mmap, 956 .splice_read = generic_file_splice_read, 957#ifdef CONFIG_CIFS_POSIX 958 .unlocked_ioctl = cifs_ioctl, 959#endif /* CONFIG_CIFS_POSIX */ 960 .llseek = cifs_llseek, 961 .setlease = cifs_setlease, 962 .fallocate = cifs_fallocate, 963}; 964 965const struct file_operations cifs_file_nobrl_ops = { 966 .read_iter = cifs_loose_read_iter, 967 .write_iter = cifs_file_write_iter, 968 .open = cifs_open, 969 .release = cifs_close, 970 .fsync = cifs_fsync, 971 .flush = cifs_flush, 972 .mmap = cifs_file_mmap, 973 .splice_read = generic_file_splice_read, 974 .llseek = cifs_llseek, 975#ifdef CONFIG_CIFS_POSIX 976 .unlocked_ioctl = cifs_ioctl, 977#endif /* CONFIG_CIFS_POSIX */ 978 .setlease = cifs_setlease, 979 .fallocate = cifs_fallocate, 980}; 981 982const struct file_operations cifs_file_strict_nobrl_ops = { 983 .read_iter = cifs_strict_readv, 984 .write_iter = cifs_strict_writev, 985 .open = cifs_open, 986 .release = cifs_close, 987 .fsync = cifs_strict_fsync, 988 .flush = cifs_flush, 989 .mmap = cifs_file_strict_mmap, 990 .splice_read = generic_file_splice_read, 991 .llseek = cifs_llseek, 992#ifdef CONFIG_CIFS_POSIX 993 .unlocked_ioctl = cifs_ioctl, 994#endif /* CONFIG_CIFS_POSIX */ 995 .setlease = cifs_setlease, 996 .fallocate = cifs_fallocate, 997}; 998 999const struct file_operations cifs_file_direct_nobrl_ops = { 1000 /* BB reevaluate whether they can be done with directio, no cache */ 1001 .read_iter = cifs_user_readv, 1002 .write_iter = cifs_user_writev, 1003 .open = cifs_open, 1004 .release = cifs_close, 1005 .fsync = cifs_fsync, 1006 .flush = cifs_flush, 1007 .mmap = cifs_file_mmap, 1008 .splice_read = generic_file_splice_read, 1009#ifdef CONFIG_CIFS_POSIX 1010 .unlocked_ioctl = cifs_ioctl, 1011#endif /* CONFIG_CIFS_POSIX */ 1012 .llseek = cifs_llseek, 1013 .setlease = cifs_setlease, 1014 .fallocate = cifs_fallocate, 1015}; 1016 1017const struct file_operations cifs_dir_ops = { 1018 .iterate = cifs_readdir, 1019 .release = cifs_closedir, 1020 .read = generic_read_dir, 1021 .unlocked_ioctl = cifs_ioctl, 1022 .llseek = generic_file_llseek, 1023}; 1024 1025static void 1026cifs_init_once(void *inode) 1027{ 1028 struct cifsInodeInfo *cifsi = inode; 1029 1030 inode_init_once(&cifsi->vfs_inode); 1031 init_rwsem(&cifsi->lock_sem); 1032} 1033 1034static int __init 1035cifs_init_inodecache(void) 1036{ 1037 cifs_inode_cachep = kmem_cache_create("cifs_inode_cache", 1038 sizeof(struct cifsInodeInfo), 1039 0, (SLAB_RECLAIM_ACCOUNT| 1040 SLAB_MEM_SPREAD), 1041 cifs_init_once); 1042 if (cifs_inode_cachep == NULL) 1043 return -ENOMEM; 1044 1045 return 0; 1046} 1047 1048static void 1049cifs_destroy_inodecache(void) 1050{ 1051 /* 1052 * Make sure all delayed rcu free inodes are flushed before we 1053 * destroy cache. 1054 */ 1055 rcu_barrier(); 1056 kmem_cache_destroy(cifs_inode_cachep); 1057} 1058 1059static int 1060cifs_init_request_bufs(void) 1061{ 1062 size_t max_hdr_size = MAX_CIFS_HDR_SIZE; 1063#ifdef CONFIG_CIFS_SMB2 1064 /* 1065 * SMB2 maximum header size is bigger than CIFS one - no problems to 1066 * allocate some more bytes for CIFS. 1067 */ 1068 max_hdr_size = MAX_SMB2_HDR_SIZE; 1069#endif 1070 if (CIFSMaxBufSize < 8192) { 1071 /* Buffer size can not be smaller than 2 * PATH_MAX since maximum 1072 Unicode path name has to fit in any SMB/CIFS path based frames */ 1073 CIFSMaxBufSize = 8192; 1074 } else if (CIFSMaxBufSize > 1024*127) { 1075 CIFSMaxBufSize = 1024 * 127; 1076 } else { 1077 CIFSMaxBufSize &= 0x1FE00; /* Round size to even 512 byte mult*/ 1078 } 1079/* 1080 cifs_dbg(VFS, "CIFSMaxBufSize %d 0x%x\n", 1081 CIFSMaxBufSize, CIFSMaxBufSize); 1082*/ 1083 cifs_req_cachep = kmem_cache_create("cifs_request", 1084 CIFSMaxBufSize + max_hdr_size, 0, 1085 SLAB_HWCACHE_ALIGN, NULL); 1086 if (cifs_req_cachep == NULL) 1087 return -ENOMEM; 1088 1089 if (cifs_min_rcv < 1) 1090 cifs_min_rcv = 1; 1091 else if (cifs_min_rcv > 64) { 1092 cifs_min_rcv = 64; 1093 cifs_dbg(VFS, "cifs_min_rcv set to maximum (64)\n"); 1094 } 1095 1096 cifs_req_poolp = mempool_create_slab_pool(cifs_min_rcv, 1097 cifs_req_cachep); 1098 1099 if (cifs_req_poolp == NULL) { 1100 kmem_cache_destroy(cifs_req_cachep); 1101 return -ENOMEM; 1102 } 1103 /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and 1104 almost all handle based requests (but not write response, nor is it 1105 sufficient for path based requests). A smaller size would have 1106 been more efficient (compacting multiple slab items on one 4k page) 1107 for the case in which debug was on, but this larger size allows 1108 more SMBs to use small buffer alloc and is still much more 1109 efficient to alloc 1 per page off the slab compared to 17K (5page) 1110 alloc of large cifs buffers even when page debugging is on */ 1111 cifs_sm_req_cachep = kmem_cache_create("cifs_small_rq", 1112 MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN, 1113 NULL); 1114 if (cifs_sm_req_cachep == NULL) { 1115 mempool_destroy(cifs_req_poolp); 1116 kmem_cache_destroy(cifs_req_cachep); 1117 return -ENOMEM; 1118 } 1119 1120 if (cifs_min_small < 2) 1121 cifs_min_small = 2; 1122 else if (cifs_min_small > 256) { 1123 cifs_min_small = 256; 1124 cifs_dbg(FYI, "cifs_min_small set to maximum (256)\n"); 1125 } 1126 1127 cifs_sm_req_poolp = mempool_create_slab_pool(cifs_min_small, 1128 cifs_sm_req_cachep); 1129 1130 if (cifs_sm_req_poolp == NULL) { 1131 mempool_destroy(cifs_req_poolp); 1132 kmem_cache_destroy(cifs_req_cachep); 1133 kmem_cache_destroy(cifs_sm_req_cachep); 1134 return -ENOMEM; 1135 } 1136 1137 return 0; 1138} 1139 1140static void 1141cifs_destroy_request_bufs(void) 1142{ 1143 mempool_destroy(cifs_req_poolp); 1144 kmem_cache_destroy(cifs_req_cachep); 1145 mempool_destroy(cifs_sm_req_poolp); 1146 kmem_cache_destroy(cifs_sm_req_cachep); 1147} 1148 1149static int 1150cifs_init_mids(void) 1151{ 1152 cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids", 1153 sizeof(struct mid_q_entry), 0, 1154 SLAB_HWCACHE_ALIGN, NULL); 1155 if (cifs_mid_cachep == NULL) 1156 return -ENOMEM; 1157 1158 /* 3 is a reasonable minimum number of simultaneous operations */ 1159 cifs_mid_poolp = mempool_create_slab_pool(3, cifs_mid_cachep); 1160 if (cifs_mid_poolp == NULL) { 1161 kmem_cache_destroy(cifs_mid_cachep); 1162 return -ENOMEM; 1163 } 1164 1165 return 0; 1166} 1167 1168static void 1169cifs_destroy_mids(void) 1170{ 1171 mempool_destroy(cifs_mid_poolp); 1172 kmem_cache_destroy(cifs_mid_cachep); 1173} 1174 1175static int __init 1176init_cifs(void) 1177{ 1178 int rc = 0; 1179 cifs_proc_init(); 1180 INIT_LIST_HEAD(&cifs_tcp_ses_list); 1181#ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */ 1182 INIT_LIST_HEAD(&GlobalDnotifyReqList); 1183 INIT_LIST_HEAD(&GlobalDnotifyRsp_Q); 1184#endif /* was needed for dnotify, and will be needed for inotify when VFS fix */ 1185/* 1186 * Initialize Global counters 1187 */ 1188 atomic_set(&sesInfoAllocCount, 0); 1189 atomic_set(&tconInfoAllocCount, 0); 1190 atomic_set(&tcpSesAllocCount, 0); 1191 atomic_set(&tcpSesReconnectCount, 0); 1192 atomic_set(&tconInfoReconnectCount, 0); 1193 1194 atomic_set(&bufAllocCount, 0); 1195 atomic_set(&smBufAllocCount, 0); 1196#ifdef CONFIG_CIFS_STATS2 1197 atomic_set(&totBufAllocCount, 0); 1198 atomic_set(&totSmBufAllocCount, 0); 1199#endif /* CONFIG_CIFS_STATS2 */ 1200 1201 atomic_set(&midCount, 0); 1202 GlobalCurrentXid = 0; 1203 GlobalTotalActiveXid = 0; 1204 GlobalMaxActiveXid = 0; 1205 spin_lock_init(&cifs_tcp_ses_lock); 1206 spin_lock_init(&cifs_file_list_lock); 1207 spin_lock_init(&GlobalMid_Lock); 1208 1209 if (cifs_max_pending < 2) { 1210 cifs_max_pending = 2; 1211 cifs_dbg(FYI, "cifs_max_pending set to min of 2\n"); 1212 } else if (cifs_max_pending > CIFS_MAX_REQ) { 1213 cifs_max_pending = CIFS_MAX_REQ; 1214 cifs_dbg(FYI, "cifs_max_pending set to max of %u\n", 1215 CIFS_MAX_REQ); 1216 } 1217 1218 cifsiod_wq = alloc_workqueue("cifsiod", WQ_FREEZABLE|WQ_MEM_RECLAIM, 0); 1219 if (!cifsiod_wq) { 1220 rc = -ENOMEM; 1221 goto out_clean_proc; 1222 } 1223 1224 rc = cifs_fscache_register(); 1225 if (rc) 1226 goto out_destroy_wq; 1227 1228 rc = cifs_init_inodecache(); 1229 if (rc) 1230 goto out_unreg_fscache; 1231 1232 rc = cifs_init_mids(); 1233 if (rc) 1234 goto out_destroy_inodecache; 1235 1236 rc = cifs_init_request_bufs(); 1237 if (rc) 1238 goto out_destroy_mids; 1239 1240#ifdef CONFIG_CIFS_UPCALL 1241 rc = init_cifs_spnego(); 1242 if (rc) 1243 goto out_destroy_request_bufs; 1244#endif /* CONFIG_CIFS_UPCALL */ 1245 1246#ifdef CONFIG_CIFS_ACL 1247 rc = init_cifs_idmap(); 1248 if (rc) 1249 goto out_register_key_type; 1250#endif /* CONFIG_CIFS_ACL */ 1251 1252 rc = register_filesystem(&cifs_fs_type); 1253 if (rc) 1254 goto out_init_cifs_idmap; 1255 1256 return 0; 1257 1258out_init_cifs_idmap: 1259#ifdef CONFIG_CIFS_ACL 1260 exit_cifs_idmap(); 1261out_register_key_type: 1262#endif 1263#ifdef CONFIG_CIFS_UPCALL 1264 exit_cifs_spnego(); 1265out_destroy_request_bufs: 1266#endif 1267 cifs_destroy_request_bufs(); 1268out_destroy_mids: 1269 cifs_destroy_mids(); 1270out_destroy_inodecache: 1271 cifs_destroy_inodecache(); 1272out_unreg_fscache: 1273 cifs_fscache_unregister(); 1274out_destroy_wq: 1275 destroy_workqueue(cifsiod_wq); 1276out_clean_proc: 1277 cifs_proc_clean(); 1278 return rc; 1279} 1280 1281static void __exit 1282exit_cifs(void) 1283{ 1284 cifs_dbg(NOISY, "exit_cifs\n"); 1285 unregister_filesystem(&cifs_fs_type); 1286 cifs_dfs_release_automount_timer(); 1287#ifdef CONFIG_CIFS_ACL 1288 exit_cifs_idmap(); 1289#endif 1290#ifdef CONFIG_CIFS_UPCALL 1291 unregister_key_type(&cifs_spnego_key_type); 1292#endif 1293 cifs_destroy_request_bufs(); 1294 cifs_destroy_mids(); 1295 cifs_destroy_inodecache(); 1296 cifs_fscache_unregister(); 1297 destroy_workqueue(cifsiod_wq); 1298 cifs_proc_clean(); 1299} 1300 1301MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>"); 1302MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */ 1303MODULE_DESCRIPTION 1304 ("VFS to access servers complying with the SNIA CIFS Specification " 1305 "e.g. Samba and Windows"); 1306MODULE_VERSION(CIFS_VERSION); 1307module_init(init_cifs) 1308module_exit(exit_cifs) 1309