4 * Copyright (C) International Business Machines Corp., 2002,2008
7 * Common Internet FileSystem (CIFS) client
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.
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.
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
24 /* Note that BB means BUGBUG (ie something to fix eventually) */
26 #include <linux/module.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 <linux/uuid.h>
41 #include <linux/xattr.h>
45 #define DECLARE_GLOBALS_HERE
47 #include "cifsproto.h"
48 #include "cifs_debug.h"
49 #include "cifs_fs_sb.h"
51 #include <linux/key-type.h>
52 #include "cifs_spnego.h"
55 #ifdef CONFIG_CIFS_DFS_UPCALL
56 #include "dfs_cache.h"
61 bool enable_oplocks = true;
62 bool linuxExtEnabled = true;
63 bool lookupCacheEnabled = true;
64 bool disable_legacy_dialects; /* false by default */
65 unsigned int global_secflags = CIFSSEC_DEF;
66 /* unsigned int ntlmv2_support = 0; */
67 unsigned int sign_CIFS_PDUs = 1;
68 static const struct super_operations cifs_super_ops;
69 unsigned int CIFSMaxBufSize = CIFS_MAX_MSGSIZE;
70 module_param(CIFSMaxBufSize, uint, 0444);
71 MODULE_PARM_DESC(CIFSMaxBufSize, "Network buffer size (not including header) "
73 "Default: 16384 Range: 8192 to 130048");
74 unsigned int cifs_min_rcv = CIFS_MIN_RCV_POOL;
75 module_param(cifs_min_rcv, uint, 0444);
76 MODULE_PARM_DESC(cifs_min_rcv, "Network buffers in pool. Default: 4 Range: "
78 unsigned int cifs_min_small = 30;
79 module_param(cifs_min_small, uint, 0444);
80 MODULE_PARM_DESC(cifs_min_small, "Small network buffers in pool. Default: 30 "
82 unsigned int cifs_max_pending = CIFS_MAX_REQ;
83 module_param(cifs_max_pending, uint, 0444);
84 MODULE_PARM_DESC(cifs_max_pending, "Simultaneous requests to server for "
85 "CIFS/SMB1 dialect (N/A for SMB3) "
86 "Default: 32767 Range: 2 to 32767.");
87 #ifdef CONFIG_CIFS_STATS2
88 unsigned int slow_rsp_threshold = 1;
89 module_param(slow_rsp_threshold, uint, 0644);
90 MODULE_PARM_DESC(slow_rsp_threshold, "Amount of time (in seconds) to wait "
91 "before logging that a response is delayed. "
92 "Default: 1 (if set to 0 disables msg).");
95 module_param(enable_oplocks, bool, 0644);
96 MODULE_PARM_DESC(enable_oplocks, "Enable or disable oplocks. Default: y/Y/1");
98 module_param(disable_legacy_dialects, bool, 0644);
99 MODULE_PARM_DESC(disable_legacy_dialects, "To improve security it may be "
100 "helpful to restrict the ability to "
101 "override the default dialects (SMB2.1, "
102 "SMB3 and SMB3.02) on mount with old "
103 "dialects (CIFS/SMB1 and SMB2) since "
104 "vers=1.0 (CIFS/SMB1) and vers=2.0 are weaker"
105 " and less secure. Default: n/N/0");
107 extern mempool_t *cifs_sm_req_poolp;
108 extern mempool_t *cifs_req_poolp;
109 extern mempool_t *cifs_mid_poolp;
111 struct workqueue_struct *cifsiod_wq;
112 struct workqueue_struct *cifsoplockd_wq;
113 __u32 cifs_lock_secret;
116 * Bumps refcount for cifs super block.
117 * Note that it should be only called if a referece to VFS super block is
118 * already held, e.g. in open-type syscalls context. Otherwise it can race with
119 * atomic_dec_and_test in deactivate_locked_super.
122 cifs_sb_active(struct super_block *sb)
124 struct cifs_sb_info *server = CIFS_SB(sb);
126 if (atomic_inc_return(&server->active) == 1)
127 atomic_inc(&sb->s_active);
131 cifs_sb_deactive(struct super_block *sb)
133 struct cifs_sb_info *server = CIFS_SB(sb);
135 if (atomic_dec_and_test(&server->active))
136 deactivate_super(sb);
140 cifs_read_super(struct super_block *sb)
143 struct cifs_sb_info *cifs_sb;
144 struct cifs_tcon *tcon;
147 cifs_sb = CIFS_SB(sb);
148 tcon = cifs_sb_master_tcon(cifs_sb);
150 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIXACL)
151 sb->s_flags |= SB_POSIXACL;
153 if (tcon->snapshot_time)
154 sb->s_flags |= SB_RDONLY;
156 if (tcon->ses->capabilities & tcon->ses->server->vals->cap_large_files)
157 sb->s_maxbytes = MAX_LFS_FILESIZE;
159 sb->s_maxbytes = MAX_NON_LFS;
161 /* BB FIXME fix time_gran to be larger for LANMAN sessions */
162 sb->s_time_gran = 100;
164 sb->s_magic = CIFS_MAGIC_NUMBER;
165 sb->s_op = &cifs_super_ops;
166 sb->s_xattr = cifs_xattr_handlers;
167 rc = super_setup_bdi(sb);
170 /* tune readahead according to rsize */
171 sb->s_bdi->ra_pages = cifs_sb->rsize / PAGE_SIZE;
173 sb->s_blocksize = CIFS_MAX_MSGSIZE;
174 sb->s_blocksize_bits = 14; /* default 2**14 = CIFS_MAX_MSGSIZE */
175 inode = cifs_root_iget(sb);
183 sb->s_d_op = &cifs_ci_dentry_ops;
185 sb->s_d_op = &cifs_dentry_ops;
187 sb->s_root = d_make_root(inode);
193 #ifdef CONFIG_CIFS_NFSD_EXPORT
194 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
195 cifs_dbg(FYI, "export ops supported\n");
196 sb->s_export_op = &cifs_export_ops;
198 #endif /* CONFIG_CIFS_NFSD_EXPORT */
203 cifs_dbg(VFS, "%s: get root inode failed\n", __func__);
207 static void cifs_kill_sb(struct super_block *sb)
209 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
211 cifs_umount(cifs_sb);
215 cifs_statfs(struct dentry *dentry, struct kstatfs *buf)
217 struct super_block *sb = dentry->d_sb;
218 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
219 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
220 struct TCP_Server_Info *server = tcon->ses->server;
226 if (le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength) > 0)
228 le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength);
230 buf->f_namelen = PATH_MAX;
232 buf->f_fsid.val[0] = tcon->vol_serial_number;
233 /* are using part of create time for more randomness, see man statfs */
234 buf->f_fsid.val[1] = (int)le64_to_cpu(tcon->vol_create_time);
236 buf->f_files = 0; /* undefined */
237 buf->f_ffree = 0; /* unlimited */
239 if (server->ops->queryfs)
240 rc = server->ops->queryfs(xid, tcon, buf);
246 static long cifs_fallocate(struct file *file, int mode, loff_t off, loff_t len)
248 struct cifs_sb_info *cifs_sb = CIFS_FILE_SB(file);
249 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
250 struct TCP_Server_Info *server = tcon->ses->server;
252 if (server->ops->fallocate)
253 return server->ops->fallocate(file, tcon, mode, off, len);
258 static int cifs_permission(struct inode *inode, int mask)
260 struct cifs_sb_info *cifs_sb;
262 cifs_sb = CIFS_SB(inode->i_sb);
264 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) {
265 if ((mask & MAY_EXEC) && !execute_ok(inode))
269 } else /* file mode might have been restricted at mount time
270 on the client (above and beyond ACL on servers) for
271 servers which do not support setting and viewing mode bits,
272 so allowing client to check permissions is useful */
273 return generic_permission(inode, mask);
276 static struct kmem_cache *cifs_inode_cachep;
277 static struct kmem_cache *cifs_req_cachep;
278 static struct kmem_cache *cifs_mid_cachep;
279 static struct kmem_cache *cifs_sm_req_cachep;
280 mempool_t *cifs_sm_req_poolp;
281 mempool_t *cifs_req_poolp;
282 mempool_t *cifs_mid_poolp;
284 static struct inode *
285 cifs_alloc_inode(struct super_block *sb)
287 struct cifsInodeInfo *cifs_inode;
288 cifs_inode = kmem_cache_alloc(cifs_inode_cachep, GFP_KERNEL);
291 cifs_inode->cifsAttrs = 0x20; /* default */
292 cifs_inode->time = 0;
294 * Until the file is open and we have gotten oplock info back from the
295 * server, can not assume caching of file data or metadata.
297 cifs_set_oplock_level(cifs_inode, 0);
298 cifs_inode->flags = 0;
299 spin_lock_init(&cifs_inode->writers_lock);
300 cifs_inode->writers = 0;
301 cifs_inode->vfs_inode.i_blkbits = 14; /* 2**14 = CIFS_MAX_MSGSIZE */
302 cifs_inode->server_eof = 0;
303 cifs_inode->uniqueid = 0;
304 cifs_inode->createtime = 0;
305 cifs_inode->epoch = 0;
306 generate_random_uuid(cifs_inode->lease_key);
309 * Can not set i_flags here - they get immediately overwritten to zero
312 /* cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME; */
313 INIT_LIST_HEAD(&cifs_inode->openFileList);
314 INIT_LIST_HEAD(&cifs_inode->llist);
315 return &cifs_inode->vfs_inode;
319 cifs_free_inode(struct inode *inode)
321 kmem_cache_free(cifs_inode_cachep, CIFS_I(inode));
325 cifs_evict_inode(struct inode *inode)
327 truncate_inode_pages_final(&inode->i_data);
329 cifs_fscache_release_inode_cookie(inode);
333 cifs_show_address(struct seq_file *s, struct TCP_Server_Info *server)
335 struct sockaddr_in *sa = (struct sockaddr_in *) &server->dstaddr;
336 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *) &server->dstaddr;
338 seq_puts(s, ",addr=");
340 switch (server->dstaddr.ss_family) {
342 seq_printf(s, "%pI4", &sa->sin_addr.s_addr);
345 seq_printf(s, "%pI6", &sa6->sin6_addr.s6_addr);
346 if (sa6->sin6_scope_id)
347 seq_printf(s, "%%%u", sa6->sin6_scope_id);
350 seq_puts(s, "(unknown)");
353 seq_puts(s, ",rdma");
357 cifs_show_security(struct seq_file *s, struct cifs_ses *ses)
359 if (ses->sectype == Unspecified) {
360 if (ses->user_name == NULL)
361 seq_puts(s, ",sec=none");
365 seq_puts(s, ",sec=");
367 switch (ses->sectype) {
369 seq_puts(s, "lanman");
372 seq_puts(s, "ntlmv2");
378 seq_printf(s, "krb5,cruid=%u", from_kuid_munged(&init_user_ns,ses->cred_uid));
381 seq_puts(s, "ntlmssp");
384 /* shouldn't ever happen */
385 seq_puts(s, "unknown");
394 cifs_show_cache_flavor(struct seq_file *s, struct cifs_sb_info *cifs_sb)
396 seq_puts(s, ",cache=");
398 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_STRICT_IO)
399 seq_puts(s, "strict");
400 else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO)
403 seq_puts(s, "loose");
407 cifs_show_nls(struct seq_file *s, struct nls_table *cur)
409 struct nls_table *def;
411 /* Display iocharset= option if it's not default charset */
412 def = load_nls_default();
414 seq_printf(s, ",iocharset=%s", cur->charset);
419 * cifs_show_options() is for displaying mount options in /proc/mounts.
420 * Not all settable options are displayed but most of the important
424 cifs_show_options(struct seq_file *s, struct dentry *root)
426 struct cifs_sb_info *cifs_sb = CIFS_SB(root->d_sb);
427 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
428 struct sockaddr *srcaddr;
429 srcaddr = (struct sockaddr *)&tcon->ses->server->srcaddr;
431 seq_show_option(s, "vers", tcon->ses->server->vals->version_string);
432 cifs_show_security(s, tcon->ses);
433 cifs_show_cache_flavor(s, cifs_sb);
435 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER)
436 seq_puts(s, ",multiuser");
437 else if (tcon->ses->user_name)
438 seq_show_option(s, "username", tcon->ses->user_name);
440 if (tcon->ses->domainName && tcon->ses->domainName[0] != 0)
441 seq_show_option(s, "domain", tcon->ses->domainName);
443 if (srcaddr->sa_family != AF_UNSPEC) {
444 struct sockaddr_in *saddr4;
445 struct sockaddr_in6 *saddr6;
446 saddr4 = (struct sockaddr_in *)srcaddr;
447 saddr6 = (struct sockaddr_in6 *)srcaddr;
448 if (srcaddr->sa_family == AF_INET6)
449 seq_printf(s, ",srcaddr=%pI6c",
451 else if (srcaddr->sa_family == AF_INET)
452 seq_printf(s, ",srcaddr=%pI4",
453 &saddr4->sin_addr.s_addr);
455 seq_printf(s, ",srcaddr=BAD-AF:%i",
456 (int)(srcaddr->sa_family));
459 seq_printf(s, ",uid=%u",
460 from_kuid_munged(&init_user_ns, cifs_sb->mnt_uid));
461 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)
462 seq_puts(s, ",forceuid");
464 seq_puts(s, ",noforceuid");
466 seq_printf(s, ",gid=%u",
467 from_kgid_munged(&init_user_ns, cifs_sb->mnt_gid));
468 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)
469 seq_puts(s, ",forcegid");
471 seq_puts(s, ",noforcegid");
473 cifs_show_address(s, tcon->ses->server);
476 seq_printf(s, ",file_mode=0%ho,dir_mode=0%ho",
477 cifs_sb->mnt_file_mode,
478 cifs_sb->mnt_dir_mode);
480 cifs_show_nls(s, cifs_sb->local_nls);
483 seq_puts(s, ",seal");
485 seq_puts(s, ",nocase");
486 if (tcon->local_lease)
487 seq_puts(s, ",locallease");
489 seq_puts(s, ",hard");
491 seq_puts(s, ",soft");
492 if (tcon->use_persistent)
493 seq_puts(s, ",persistenthandles");
494 else if (tcon->use_resilient)
495 seq_puts(s, ",resilienthandles");
496 if (tcon->posix_extensions)
497 seq_puts(s, ",posix");
498 else if (tcon->unix_ext)
499 seq_puts(s, ",unix");
501 seq_puts(s, ",nounix");
502 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_DFS)
503 seq_puts(s, ",nodfs");
504 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
505 seq_puts(s, ",posixpaths");
506 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)
507 seq_puts(s, ",setuids");
508 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UID_FROM_ACL)
509 seq_puts(s, ",idsfromsid");
510 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
511 seq_puts(s, ",serverino");
512 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RWPIDFORWARD)
513 seq_puts(s, ",rwpidforward");
514 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL)
515 seq_puts(s, ",forcemand");
516 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
517 seq_puts(s, ",nouser_xattr");
518 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR)
519 seq_puts(s, ",mapchars");
520 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SFM_CHR)
521 seq_puts(s, ",mapposix");
522 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)
524 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
525 seq_puts(s, ",nobrl");
526 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_HANDLE_CACHE)
527 seq_puts(s, ",nohandlecache");
528 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
529 seq_puts(s, ",cifsacl");
530 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)
531 seq_puts(s, ",dynperm");
532 if (root->d_sb->s_flags & SB_POSIXACL)
534 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS)
535 seq_puts(s, ",mfsymlinks");
536 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_FSCACHE)
538 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOSSYNC)
539 seq_puts(s, ",nostrictsync");
540 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM)
541 seq_puts(s, ",noperm");
542 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_BACKUPUID)
543 seq_printf(s, ",backupuid=%u",
544 from_kuid_munged(&init_user_ns,
545 cifs_sb->mnt_backupuid));
546 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_BACKUPGID)
547 seq_printf(s, ",backupgid=%u",
548 from_kgid_munged(&init_user_ns,
549 cifs_sb->mnt_backupgid));
551 seq_printf(s, ",rsize=%u", cifs_sb->rsize);
552 seq_printf(s, ",wsize=%u", cifs_sb->wsize);
553 seq_printf(s, ",bsize=%u", cifs_sb->bsize);
554 seq_printf(s, ",echo_interval=%lu",
555 tcon->ses->server->echo_interval / HZ);
556 if (tcon->snapshot_time)
557 seq_printf(s, ",snapshot=%llu", tcon->snapshot_time);
558 if (tcon->handle_timeout)
559 seq_printf(s, ",handletimeout=%u", tcon->handle_timeout);
560 /* convert actimeo and display it in seconds */
561 seq_printf(s, ",actimeo=%lu", cifs_sb->actimeo / HZ);
566 static void cifs_umount_begin(struct super_block *sb)
568 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
569 struct cifs_tcon *tcon;
574 tcon = cifs_sb_master_tcon(cifs_sb);
576 spin_lock(&cifs_tcp_ses_lock);
577 if ((tcon->tc_count > 1) || (tcon->tidStatus == CifsExiting)) {
578 /* we have other mounts to same share or we have
579 already tried to force umount this and woken up
580 all waiting network requests, nothing to do */
581 spin_unlock(&cifs_tcp_ses_lock);
583 } else if (tcon->tc_count == 1)
584 tcon->tidStatus = CifsExiting;
585 spin_unlock(&cifs_tcp_ses_lock);
587 /* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */
588 /* cancel_notify_requests(tcon); */
589 if (tcon->ses && tcon->ses->server) {
590 cifs_dbg(FYI, "wake up tasks now - umount begin not complete\n");
591 wake_up_all(&tcon->ses->server->request_q);
592 wake_up_all(&tcon->ses->server->response_q);
593 msleep(1); /* yield */
594 /* we have to kick the requests once more */
595 wake_up_all(&tcon->ses->server->response_q);
602 #ifdef CONFIG_CIFS_STATS2
603 static int cifs_show_stats(struct seq_file *s, struct dentry *root)
610 static int cifs_remount(struct super_block *sb, int *flags, char *data)
613 *flags |= SB_NODIRATIME;
617 static int cifs_drop_inode(struct inode *inode)
619 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
621 /* no serverino => unconditional eviction */
622 return !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) ||
623 generic_drop_inode(inode);
626 static const struct super_operations cifs_super_ops = {
627 .statfs = cifs_statfs,
628 .alloc_inode = cifs_alloc_inode,
629 .free_inode = cifs_free_inode,
630 .drop_inode = cifs_drop_inode,
631 .evict_inode = cifs_evict_inode,
632 /* .delete_inode = cifs_delete_inode, */ /* Do not need above
633 function unless later we add lazy close of inodes or unless the
634 kernel forgets to call us with the same number of releases (closes)
636 .show_options = cifs_show_options,
637 .umount_begin = cifs_umount_begin,
638 .remount_fs = cifs_remount,
639 #ifdef CONFIG_CIFS_STATS2
640 .show_stats = cifs_show_stats,
645 * Get root dentry from superblock according to prefix path mount option.
646 * Return dentry with refcount + 1 on success and NULL otherwise.
648 static struct dentry *
649 cifs_get_root(struct smb_vol *vol, struct super_block *sb)
651 struct dentry *dentry;
652 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
653 char *full_path = NULL;
657 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_USE_PREFIX_PATH)
658 return dget(sb->s_root);
660 full_path = cifs_build_path_to_root(vol, cifs_sb,
661 cifs_sb_master_tcon(cifs_sb), 0);
662 if (full_path == NULL)
663 return ERR_PTR(-ENOMEM);
665 cifs_dbg(FYI, "Get root dentry for %s\n", full_path);
667 sep = CIFS_DIR_SEP(cifs_sb);
668 dentry = dget(sb->s_root);
672 struct inode *dir = d_inode(dentry);
673 struct dentry *child;
677 dentry = ERR_PTR(-ENOENT);
680 if (!S_ISDIR(dir->i_mode)) {
682 dentry = ERR_PTR(-ENOTDIR);
686 /* skip separators */
693 while (*s && *s != sep)
696 child = lookup_one_len_unlocked(p, dentry, s - p);
699 } while (!IS_ERR(dentry));
704 static int cifs_set_super(struct super_block *sb, void *data)
706 struct cifs_mnt_data *mnt_data = data;
707 sb->s_fs_info = mnt_data->cifs_sb;
708 return set_anon_super(sb, NULL);
711 static struct dentry *
712 cifs_smb3_do_mount(struct file_system_type *fs_type,
713 int flags, const char *dev_name, void *data, bool is_smb3)
716 struct super_block *sb;
717 struct cifs_sb_info *cifs_sb;
718 struct smb_vol *volume_info;
719 struct cifs_mnt_data mnt_data;
723 * Prints in Kernel / CIFS log the attempted mount operation
724 * If CIFS_DEBUG && cifs_FYI
727 cifs_dbg(FYI, "Devname: %s flags: %d\n", dev_name, flags);
729 cifs_info("Attempting to mount %s\n", dev_name);
731 volume_info = cifs_get_volume_info((char *)data, dev_name, is_smb3);
732 if (IS_ERR(volume_info))
733 return ERR_CAST(volume_info);
735 cifs_sb = kzalloc(sizeof(struct cifs_sb_info), GFP_KERNEL);
736 if (cifs_sb == NULL) {
737 root = ERR_PTR(-ENOMEM);
741 cifs_sb->mountdata = kstrndup(data, PAGE_SIZE, GFP_KERNEL);
742 if (cifs_sb->mountdata == NULL) {
743 root = ERR_PTR(-ENOMEM);
747 rc = cifs_setup_cifs_sb(volume_info, cifs_sb);
753 rc = cifs_mount(cifs_sb, volume_info);
755 if (!(flags & SB_SILENT))
756 cifs_dbg(VFS, "cifs_mount failed w/return code = %d\n",
762 mnt_data.vol = volume_info;
763 mnt_data.cifs_sb = cifs_sb;
764 mnt_data.flags = flags;
766 /* BB should we make this contingent on mount parm? */
767 flags |= SB_NODIRATIME | SB_NOATIME;
769 sb = sget(fs_type, cifs_match_super, cifs_set_super, flags, &mnt_data);
772 cifs_umount(cifs_sb);
777 cifs_dbg(FYI, "Use existing superblock\n");
778 cifs_umount(cifs_sb);
780 rc = cifs_read_super(sb);
786 sb->s_flags |= SB_ACTIVE;
789 root = cifs_get_root(volume_info, sb);
793 cifs_dbg(FYI, "dentry root is: %p\n", root);
797 deactivate_locked_super(sb);
799 cifs_cleanup_volume_info(volume_info);
803 kfree(cifs_sb->prepath);
804 kfree(cifs_sb->mountdata);
807 unload_nls(volume_info->local_nls);
811 static struct dentry *
812 smb3_do_mount(struct file_system_type *fs_type,
813 int flags, const char *dev_name, void *data)
815 return cifs_smb3_do_mount(fs_type, flags, dev_name, data, true);
818 static struct dentry *
819 cifs_do_mount(struct file_system_type *fs_type,
820 int flags, const char *dev_name, void *data)
822 return cifs_smb3_do_mount(fs_type, flags, dev_name, data, false);
826 cifs_loose_read_iter(struct kiocb *iocb, struct iov_iter *iter)
829 struct inode *inode = file_inode(iocb->ki_filp);
831 if (iocb->ki_filp->f_flags & O_DIRECT)
832 return cifs_user_readv(iocb, iter);
834 rc = cifs_revalidate_mapping(inode);
838 return generic_file_read_iter(iocb, iter);
841 static ssize_t cifs_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
843 struct inode *inode = file_inode(iocb->ki_filp);
844 struct cifsInodeInfo *cinode = CIFS_I(inode);
848 if (iocb->ki_filp->f_flags & O_DIRECT) {
849 written = cifs_user_writev(iocb, from);
850 if (written > 0 && CIFS_CACHE_READ(cinode)) {
851 cifs_zap_mapping(inode);
853 "Set no oplock for inode=%p after a write operation\n",
860 written = cifs_get_writer(cinode);
864 written = generic_file_write_iter(iocb, from);
866 if (CIFS_CACHE_WRITE(CIFS_I(inode)))
869 rc = filemap_fdatawrite(inode->i_mapping);
871 cifs_dbg(FYI, "cifs_file_write_iter: %d rc on %p inode\n",
875 cifs_put_writer(cinode);
879 static loff_t cifs_llseek(struct file *file, loff_t offset, int whence)
881 struct cifsFileInfo *cfile = file->private_data;
882 struct cifs_tcon *tcon;
885 * whence == SEEK_END || SEEK_DATA || SEEK_HOLE => we must revalidate
886 * the cached file length
888 if (whence != SEEK_SET && whence != SEEK_CUR) {
890 struct inode *inode = file_inode(file);
893 * We need to be sure that all dirty pages are written and the
894 * server has the newest file length.
896 if (!CIFS_CACHE_READ(CIFS_I(inode)) && inode->i_mapping &&
897 inode->i_mapping->nrpages != 0) {
898 rc = filemap_fdatawait(inode->i_mapping);
900 mapping_set_error(inode->i_mapping, rc);
905 * Some applications poll for the file length in this strange
906 * way so we must seek to end on non-oplocked files by
907 * setting the revalidate time to zero.
909 CIFS_I(inode)->time = 0;
911 rc = cifs_revalidate_file_attr(file);
915 if (cfile && cfile->tlink) {
916 tcon = tlink_tcon(cfile->tlink);
917 if (tcon->ses->server->ops->llseek)
918 return tcon->ses->server->ops->llseek(file, tcon,
921 return generic_file_llseek(file, offset, whence);
925 cifs_setlease(struct file *file, long arg, struct file_lock **lease, void **priv)
928 * Note that this is called by vfs setlease with i_lock held to
929 * protect *lease from going away.
931 struct inode *inode = file_inode(file);
932 struct cifsFileInfo *cfile = file->private_data;
934 if (!(S_ISREG(inode->i_mode)))
937 /* Check if file is oplocked if this is request for new lease */
938 if (arg == F_UNLCK ||
939 ((arg == F_RDLCK) && CIFS_CACHE_READ(CIFS_I(inode))) ||
940 ((arg == F_WRLCK) && CIFS_CACHE_WRITE(CIFS_I(inode))))
941 return generic_setlease(file, arg, lease, priv);
942 else if (tlink_tcon(cfile->tlink)->local_lease &&
943 !CIFS_CACHE_READ(CIFS_I(inode)))
945 * If the server claims to support oplock on this file, then we
946 * still need to check oplock even if the local_lease mount
947 * option is set, but there are servers which do not support
948 * oplock for which this mount option may be useful if the user
949 * knows that the file won't be changed on the server by anyone
952 return generic_setlease(file, arg, lease, priv);
957 struct file_system_type cifs_fs_type = {
958 .owner = THIS_MODULE,
960 .mount = cifs_do_mount,
961 .kill_sb = cifs_kill_sb,
964 MODULE_ALIAS_FS("cifs");
966 static struct file_system_type smb3_fs_type = {
967 .owner = THIS_MODULE,
969 .mount = smb3_do_mount,
970 .kill_sb = cifs_kill_sb,
973 MODULE_ALIAS_FS("smb3");
974 MODULE_ALIAS("smb3");
976 const struct inode_operations cifs_dir_inode_ops = {
977 .create = cifs_create,
978 .atomic_open = cifs_atomic_open,
979 .lookup = cifs_lookup,
980 .getattr = cifs_getattr,
981 .unlink = cifs_unlink,
982 .link = cifs_hardlink,
985 .rename = cifs_rename2,
986 .permission = cifs_permission,
987 .setattr = cifs_setattr,
988 .symlink = cifs_symlink,
990 .listxattr = cifs_listxattr,
993 const struct inode_operations cifs_file_inode_ops = {
994 .setattr = cifs_setattr,
995 .getattr = cifs_getattr,
996 .permission = cifs_permission,
997 .listxattr = cifs_listxattr,
998 .fiemap = cifs_fiemap,
1001 const struct inode_operations cifs_symlink_inode_ops = {
1002 .get_link = cifs_get_link,
1003 .permission = cifs_permission,
1004 .listxattr = cifs_listxattr,
1007 static loff_t cifs_remap_file_range(struct file *src_file, loff_t off,
1008 struct file *dst_file, loff_t destoff, loff_t len,
1009 unsigned int remap_flags)
1011 struct inode *src_inode = file_inode(src_file);
1012 struct inode *target_inode = file_inode(dst_file);
1013 struct cifsFileInfo *smb_file_src = src_file->private_data;
1014 struct cifsFileInfo *smb_file_target;
1015 struct cifs_tcon *target_tcon;
1019 if (remap_flags & ~(REMAP_FILE_DEDUP | REMAP_FILE_ADVISORY))
1022 cifs_dbg(FYI, "clone range\n");
1026 if (!src_file->private_data || !dst_file->private_data) {
1028 cifs_dbg(VFS, "missing cifsFileInfo on copy range src file\n");
1032 smb_file_target = dst_file->private_data;
1033 target_tcon = tlink_tcon(smb_file_target->tlink);
1036 * Note: cifs case is easier than btrfs since server responsible for
1037 * checks for proper open modes and file type and if it wants
1038 * server could even support copy of range where source = target
1040 lock_two_nondirectories(target_inode, src_inode);
1043 len = src_inode->i_size - off;
1045 cifs_dbg(FYI, "about to flush pages\n");
1046 /* should we flush first and last page first */
1047 truncate_inode_pages_range(&target_inode->i_data, destoff,
1048 PAGE_ALIGN(destoff + len)-1);
1050 if (target_tcon->ses->server->ops->duplicate_extents)
1051 rc = target_tcon->ses->server->ops->duplicate_extents(xid,
1052 smb_file_src, smb_file_target, off, len, destoff);
1056 /* force revalidate of size and timestamps of target file now
1057 that target is updated on the server */
1058 CIFS_I(target_inode)->time = 0;
1059 /* although unlocking in the reverse order from locking is not
1060 strictly necessary here it is a little cleaner to be consistent */
1061 unlock_two_nondirectories(src_inode, target_inode);
1064 return rc < 0 ? rc : len;
1067 ssize_t cifs_file_copychunk_range(unsigned int xid,
1068 struct file *src_file, loff_t off,
1069 struct file *dst_file, loff_t destoff,
1070 size_t len, unsigned int flags)
1072 struct inode *src_inode = file_inode(src_file);
1073 struct inode *target_inode = file_inode(dst_file);
1074 struct cifsFileInfo *smb_file_src;
1075 struct cifsFileInfo *smb_file_target;
1076 struct cifs_tcon *src_tcon;
1077 struct cifs_tcon *target_tcon;
1080 cifs_dbg(FYI, "copychunk range\n");
1082 if (!src_file->private_data || !dst_file->private_data) {
1084 cifs_dbg(VFS, "missing cifsFileInfo on copy range src file\n");
1089 smb_file_target = dst_file->private_data;
1090 smb_file_src = src_file->private_data;
1091 src_tcon = tlink_tcon(smb_file_src->tlink);
1092 target_tcon = tlink_tcon(smb_file_target->tlink);
1094 if (src_tcon->ses != target_tcon->ses) {
1095 cifs_dbg(VFS, "source and target of copy not on same server\n");
1100 * Note: cifs case is easier than btrfs since server responsible for
1101 * checks for proper open modes and file type and if it wants
1102 * server could even support copy of range where source = target
1104 lock_two_nondirectories(target_inode, src_inode);
1106 cifs_dbg(FYI, "about to flush pages\n");
1107 /* should we flush first and last page first */
1108 truncate_inode_pages(&target_inode->i_data, 0);
1110 if (target_tcon->ses->server->ops->copychunk_range)
1111 rc = target_tcon->ses->server->ops->copychunk_range(xid,
1112 smb_file_src, smb_file_target, off, len, destoff);
1116 /* force revalidate of size and timestamps of target file now
1117 * that target is updated on the server
1119 CIFS_I(target_inode)->time = 0;
1120 /* although unlocking in the reverse order from locking is not
1121 * strictly necessary here it is a little cleaner to be consistent
1123 unlock_two_nondirectories(src_inode, target_inode);
1130 * Directory operations under CIFS/SMB2/SMB3 are synchronous, so fsync()
1131 * is a dummy operation.
1133 static int cifs_dir_fsync(struct file *file, loff_t start, loff_t end, int datasync)
1135 cifs_dbg(FYI, "Sync directory - name: %pD datasync: 0x%x\n",
1141 static ssize_t cifs_copy_file_range(struct file *src_file, loff_t off,
1142 struct file *dst_file, loff_t destoff,
1143 size_t len, unsigned int flags)
1145 unsigned int xid = get_xid();
1148 rc = cifs_file_copychunk_range(xid, src_file, off, dst_file, destoff,
1154 const struct file_operations cifs_file_ops = {
1155 .read_iter = cifs_loose_read_iter,
1156 .write_iter = cifs_file_write_iter,
1158 .release = cifs_close,
1160 .fsync = cifs_fsync,
1161 .flush = cifs_flush,
1162 .mmap = cifs_file_mmap,
1163 .splice_read = generic_file_splice_read,
1164 .splice_write = iter_file_splice_write,
1165 .llseek = cifs_llseek,
1166 .unlocked_ioctl = cifs_ioctl,
1167 .copy_file_range = cifs_copy_file_range,
1168 .remap_file_range = cifs_remap_file_range,
1169 .setlease = cifs_setlease,
1170 .fallocate = cifs_fallocate,
1173 const struct file_operations cifs_file_strict_ops = {
1174 .read_iter = cifs_strict_readv,
1175 .write_iter = cifs_strict_writev,
1177 .release = cifs_close,
1179 .fsync = cifs_strict_fsync,
1180 .flush = cifs_flush,
1181 .mmap = cifs_file_strict_mmap,
1182 .splice_read = generic_file_splice_read,
1183 .splice_write = iter_file_splice_write,
1184 .llseek = cifs_llseek,
1185 .unlocked_ioctl = cifs_ioctl,
1186 .copy_file_range = cifs_copy_file_range,
1187 .remap_file_range = cifs_remap_file_range,
1188 .setlease = cifs_setlease,
1189 .fallocate = cifs_fallocate,
1192 const struct file_operations cifs_file_direct_ops = {
1193 .read_iter = cifs_direct_readv,
1194 .write_iter = cifs_direct_writev,
1196 .release = cifs_close,
1198 .fsync = cifs_fsync,
1199 .flush = cifs_flush,
1200 .mmap = cifs_file_mmap,
1201 .splice_read = generic_file_splice_read,
1202 .splice_write = iter_file_splice_write,
1203 .unlocked_ioctl = cifs_ioctl,
1204 .copy_file_range = cifs_copy_file_range,
1205 .remap_file_range = cifs_remap_file_range,
1206 .llseek = cifs_llseek,
1207 .setlease = cifs_setlease,
1208 .fallocate = cifs_fallocate,
1211 const struct file_operations cifs_file_nobrl_ops = {
1212 .read_iter = cifs_loose_read_iter,
1213 .write_iter = cifs_file_write_iter,
1215 .release = cifs_close,
1216 .fsync = cifs_fsync,
1217 .flush = cifs_flush,
1218 .mmap = cifs_file_mmap,
1219 .splice_read = generic_file_splice_read,
1220 .splice_write = iter_file_splice_write,
1221 .llseek = cifs_llseek,
1222 .unlocked_ioctl = cifs_ioctl,
1223 .copy_file_range = cifs_copy_file_range,
1224 .remap_file_range = cifs_remap_file_range,
1225 .setlease = cifs_setlease,
1226 .fallocate = cifs_fallocate,
1229 const struct file_operations cifs_file_strict_nobrl_ops = {
1230 .read_iter = cifs_strict_readv,
1231 .write_iter = cifs_strict_writev,
1233 .release = cifs_close,
1234 .fsync = cifs_strict_fsync,
1235 .flush = cifs_flush,
1236 .mmap = cifs_file_strict_mmap,
1237 .splice_read = generic_file_splice_read,
1238 .splice_write = iter_file_splice_write,
1239 .llseek = cifs_llseek,
1240 .unlocked_ioctl = cifs_ioctl,
1241 .copy_file_range = cifs_copy_file_range,
1242 .remap_file_range = cifs_remap_file_range,
1243 .setlease = cifs_setlease,
1244 .fallocate = cifs_fallocate,
1247 const struct file_operations cifs_file_direct_nobrl_ops = {
1248 .read_iter = cifs_direct_readv,
1249 .write_iter = cifs_direct_writev,
1251 .release = cifs_close,
1252 .fsync = cifs_fsync,
1253 .flush = cifs_flush,
1254 .mmap = cifs_file_mmap,
1255 .splice_read = generic_file_splice_read,
1256 .splice_write = iter_file_splice_write,
1257 .unlocked_ioctl = cifs_ioctl,
1258 .copy_file_range = cifs_copy_file_range,
1259 .remap_file_range = cifs_remap_file_range,
1260 .llseek = cifs_llseek,
1261 .setlease = cifs_setlease,
1262 .fallocate = cifs_fallocate,
1265 const struct file_operations cifs_dir_ops = {
1266 .iterate_shared = cifs_readdir,
1267 .release = cifs_closedir,
1268 .read = generic_read_dir,
1269 .unlocked_ioctl = cifs_ioctl,
1270 .copy_file_range = cifs_copy_file_range,
1271 .remap_file_range = cifs_remap_file_range,
1272 .llseek = generic_file_llseek,
1273 .fsync = cifs_dir_fsync,
1277 cifs_init_once(void *inode)
1279 struct cifsInodeInfo *cifsi = inode;
1281 inode_init_once(&cifsi->vfs_inode);
1282 init_rwsem(&cifsi->lock_sem);
1286 cifs_init_inodecache(void)
1288 cifs_inode_cachep = kmem_cache_create("cifs_inode_cache",
1289 sizeof(struct cifsInodeInfo),
1290 0, (SLAB_RECLAIM_ACCOUNT|
1291 SLAB_MEM_SPREAD|SLAB_ACCOUNT),
1293 if (cifs_inode_cachep == NULL)
1300 cifs_destroy_inodecache(void)
1303 * Make sure all delayed rcu free inodes are flushed before we
1307 kmem_cache_destroy(cifs_inode_cachep);
1311 cifs_init_request_bufs(void)
1314 * SMB2 maximum header size is bigger than CIFS one - no problems to
1315 * allocate some more bytes for CIFS.
1317 size_t max_hdr_size = MAX_SMB2_HDR_SIZE;
1319 if (CIFSMaxBufSize < 8192) {
1320 /* Buffer size can not be smaller than 2 * PATH_MAX since maximum
1321 Unicode path name has to fit in any SMB/CIFS path based frames */
1322 CIFSMaxBufSize = 8192;
1323 } else if (CIFSMaxBufSize > 1024*127) {
1324 CIFSMaxBufSize = 1024 * 127;
1326 CIFSMaxBufSize &= 0x1FE00; /* Round size to even 512 byte mult*/
1329 cifs_dbg(VFS, "CIFSMaxBufSize %d 0x%x\n",
1330 CIFSMaxBufSize, CIFSMaxBufSize);
1332 cifs_req_cachep = kmem_cache_create_usercopy("cifs_request",
1333 CIFSMaxBufSize + max_hdr_size, 0,
1334 SLAB_HWCACHE_ALIGN, 0,
1335 CIFSMaxBufSize + max_hdr_size,
1337 if (cifs_req_cachep == NULL)
1340 if (cifs_min_rcv < 1)
1342 else if (cifs_min_rcv > 64) {
1344 cifs_dbg(VFS, "cifs_min_rcv set to maximum (64)\n");
1347 cifs_req_poolp = mempool_create_slab_pool(cifs_min_rcv,
1350 if (cifs_req_poolp == NULL) {
1351 kmem_cache_destroy(cifs_req_cachep);
1354 /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and
1355 almost all handle based requests (but not write response, nor is it
1356 sufficient for path based requests). A smaller size would have
1357 been more efficient (compacting multiple slab items on one 4k page)
1358 for the case in which debug was on, but this larger size allows
1359 more SMBs to use small buffer alloc and is still much more
1360 efficient to alloc 1 per page off the slab compared to 17K (5page)
1361 alloc of large cifs buffers even when page debugging is on */
1362 cifs_sm_req_cachep = kmem_cache_create_usercopy("cifs_small_rq",
1363 MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN,
1364 0, MAX_CIFS_SMALL_BUFFER_SIZE, NULL);
1365 if (cifs_sm_req_cachep == NULL) {
1366 mempool_destroy(cifs_req_poolp);
1367 kmem_cache_destroy(cifs_req_cachep);
1371 if (cifs_min_small < 2)
1373 else if (cifs_min_small > 256) {
1374 cifs_min_small = 256;
1375 cifs_dbg(FYI, "cifs_min_small set to maximum (256)\n");
1378 cifs_sm_req_poolp = mempool_create_slab_pool(cifs_min_small,
1379 cifs_sm_req_cachep);
1381 if (cifs_sm_req_poolp == NULL) {
1382 mempool_destroy(cifs_req_poolp);
1383 kmem_cache_destroy(cifs_req_cachep);
1384 kmem_cache_destroy(cifs_sm_req_cachep);
1392 cifs_destroy_request_bufs(void)
1394 mempool_destroy(cifs_req_poolp);
1395 kmem_cache_destroy(cifs_req_cachep);
1396 mempool_destroy(cifs_sm_req_poolp);
1397 kmem_cache_destroy(cifs_sm_req_cachep);
1401 cifs_init_mids(void)
1403 cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids",
1404 sizeof(struct mid_q_entry), 0,
1405 SLAB_HWCACHE_ALIGN, NULL);
1406 if (cifs_mid_cachep == NULL)
1409 /* 3 is a reasonable minimum number of simultaneous operations */
1410 cifs_mid_poolp = mempool_create_slab_pool(3, cifs_mid_cachep);
1411 if (cifs_mid_poolp == NULL) {
1412 kmem_cache_destroy(cifs_mid_cachep);
1420 cifs_destroy_mids(void)
1422 mempool_destroy(cifs_mid_poolp);
1423 kmem_cache_destroy(cifs_mid_cachep);
1431 INIT_LIST_HEAD(&cifs_tcp_ses_list);
1432 #ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
1433 INIT_LIST_HEAD(&GlobalDnotifyReqList);
1434 INIT_LIST_HEAD(&GlobalDnotifyRsp_Q);
1435 #endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
1437 * Initialize Global counters
1439 atomic_set(&sesInfoAllocCount, 0);
1440 atomic_set(&tconInfoAllocCount, 0);
1441 atomic_set(&tcpSesAllocCount, 0);
1442 atomic_set(&tcpSesReconnectCount, 0);
1443 atomic_set(&tconInfoReconnectCount, 0);
1445 atomic_set(&bufAllocCount, 0);
1446 atomic_set(&smBufAllocCount, 0);
1447 #ifdef CONFIG_CIFS_STATS2
1448 atomic_set(&totBufAllocCount, 0);
1449 atomic_set(&totSmBufAllocCount, 0);
1450 if (slow_rsp_threshold < 1)
1451 cifs_dbg(FYI, "slow_response_threshold msgs disabled\n");
1452 else if (slow_rsp_threshold > 32767)
1454 "slow response threshold set higher than recommended (0 to 32767)\n");
1455 #endif /* CONFIG_CIFS_STATS2 */
1457 atomic_set(&midCount, 0);
1458 GlobalCurrentXid = 0;
1459 GlobalTotalActiveXid = 0;
1460 GlobalMaxActiveXid = 0;
1461 spin_lock_init(&cifs_tcp_ses_lock);
1462 spin_lock_init(&GlobalMid_Lock);
1464 cifs_lock_secret = get_random_u32();
1466 if (cifs_max_pending < 2) {
1467 cifs_max_pending = 2;
1468 cifs_dbg(FYI, "cifs_max_pending set to min of 2\n");
1469 } else if (cifs_max_pending > CIFS_MAX_REQ) {
1470 cifs_max_pending = CIFS_MAX_REQ;
1471 cifs_dbg(FYI, "cifs_max_pending set to max of %u\n",
1475 cifsiod_wq = alloc_workqueue("cifsiod", WQ_FREEZABLE|WQ_MEM_RECLAIM, 0);
1478 goto out_clean_proc;
1481 cifsoplockd_wq = alloc_workqueue("cifsoplockd",
1482 WQ_FREEZABLE|WQ_MEM_RECLAIM, 0);
1483 if (!cifsoplockd_wq) {
1485 goto out_destroy_cifsiod_wq;
1488 rc = cifs_fscache_register();
1490 goto out_destroy_cifsoplockd_wq;
1492 rc = cifs_init_inodecache();
1494 goto out_unreg_fscache;
1496 rc = cifs_init_mids();
1498 goto out_destroy_inodecache;
1500 rc = cifs_init_request_bufs();
1502 goto out_destroy_mids;
1504 #ifdef CONFIG_CIFS_DFS_UPCALL
1505 rc = dfs_cache_init();
1507 goto out_destroy_request_bufs;
1508 #endif /* CONFIG_CIFS_DFS_UPCALL */
1509 #ifdef CONFIG_CIFS_UPCALL
1510 rc = init_cifs_spnego();
1512 goto out_destroy_dfs_cache;
1513 #endif /* CONFIG_CIFS_UPCALL */
1515 #ifdef CONFIG_CIFS_ACL
1516 rc = init_cifs_idmap();
1518 goto out_register_key_type;
1519 #endif /* CONFIG_CIFS_ACL */
1521 rc = register_filesystem(&cifs_fs_type);
1523 goto out_init_cifs_idmap;
1525 rc = register_filesystem(&smb3_fs_type);
1527 unregister_filesystem(&cifs_fs_type);
1528 goto out_init_cifs_idmap;
1533 out_init_cifs_idmap:
1534 #ifdef CONFIG_CIFS_ACL
1536 out_register_key_type:
1538 #ifdef CONFIG_CIFS_UPCALL
1540 out_destroy_dfs_cache:
1542 #ifdef CONFIG_CIFS_DFS_UPCALL
1543 dfs_cache_destroy();
1544 out_destroy_request_bufs:
1546 cifs_destroy_request_bufs();
1548 cifs_destroy_mids();
1549 out_destroy_inodecache:
1550 cifs_destroy_inodecache();
1552 cifs_fscache_unregister();
1553 out_destroy_cifsoplockd_wq:
1554 destroy_workqueue(cifsoplockd_wq);
1555 out_destroy_cifsiod_wq:
1556 destroy_workqueue(cifsiod_wq);
1565 cifs_dbg(NOISY, "exit_smb3\n");
1566 unregister_filesystem(&cifs_fs_type);
1567 unregister_filesystem(&smb3_fs_type);
1568 cifs_dfs_release_automount_timer();
1569 #ifdef CONFIG_CIFS_ACL
1572 #ifdef CONFIG_CIFS_UPCALL
1575 #ifdef CONFIG_CIFS_DFS_UPCALL
1576 dfs_cache_destroy();
1578 cifs_destroy_request_bufs();
1579 cifs_destroy_mids();
1580 cifs_destroy_inodecache();
1581 cifs_fscache_unregister();
1582 destroy_workqueue(cifsoplockd_wq);
1583 destroy_workqueue(cifsiod_wq);
1587 MODULE_AUTHOR("Steve French");
1588 MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */
1590 ("VFS to access SMB3 servers e.g. Samba, Macs, Azure and Windows (and "
1591 "also older servers complying with the SNIA CIFS Specification)");
1592 MODULE_VERSION(CIFS_VERSION);
1593 MODULE_SOFTDEP("pre: arc4");
1594 MODULE_SOFTDEP("pre: des");
1595 MODULE_SOFTDEP("pre: ecb");
1596 MODULE_SOFTDEP("pre: hmac");
1597 MODULE_SOFTDEP("pre: md4");
1598 MODULE_SOFTDEP("pre: md5");
1599 MODULE_SOFTDEP("pre: nls");
1600 MODULE_SOFTDEP("pre: aes");
1601 MODULE_SOFTDEP("pre: cmac");
1602 MODULE_SOFTDEP("pre: sha256");
1603 MODULE_SOFTDEP("pre: sha512");
1604 MODULE_SOFTDEP("pre: aead2");
1605 MODULE_SOFTDEP("pre: ccm");
1606 module_init(init_cifs)
1607 module_exit(exit_cifs)