4 * Copyright (C) International Business Machines Corp., 2002,2008
5 * Author(s): Steve French (sfrench@us.ibm.com)
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 spin_lock_init(&cifs_inode->open_file_lock);
307 generate_random_uuid(cifs_inode->lease_key);
310 * Can not set i_flags here - they get immediately overwritten to zero
313 /* cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME; */
314 INIT_LIST_HEAD(&cifs_inode->openFileList);
315 INIT_LIST_HEAD(&cifs_inode->llist);
316 return &cifs_inode->vfs_inode;
320 cifs_free_inode(struct inode *inode)
322 kmem_cache_free(cifs_inode_cachep, CIFS_I(inode));
326 cifs_evict_inode(struct inode *inode)
328 truncate_inode_pages_final(&inode->i_data);
330 cifs_fscache_release_inode_cookie(inode);
334 cifs_show_address(struct seq_file *s, struct TCP_Server_Info *server)
336 struct sockaddr_in *sa = (struct sockaddr_in *) &server->dstaddr;
337 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *) &server->dstaddr;
339 seq_puts(s, ",addr=");
341 switch (server->dstaddr.ss_family) {
343 seq_printf(s, "%pI4", &sa->sin_addr.s_addr);
346 seq_printf(s, "%pI6", &sa6->sin6_addr.s6_addr);
347 if (sa6->sin6_scope_id)
348 seq_printf(s, "%%%u", sa6->sin6_scope_id);
351 seq_puts(s, "(unknown)");
354 seq_puts(s, ",rdma");
358 cifs_show_security(struct seq_file *s, struct cifs_ses *ses)
360 if (ses->sectype == Unspecified) {
361 if (ses->user_name == NULL)
362 seq_puts(s, ",sec=none");
366 seq_puts(s, ",sec=");
368 switch (ses->sectype) {
370 seq_puts(s, "lanman");
373 seq_puts(s, "ntlmv2");
379 seq_printf(s, "krb5,cruid=%u", from_kuid_munged(&init_user_ns,ses->cred_uid));
382 seq_puts(s, "ntlmssp");
385 /* shouldn't ever happen */
386 seq_puts(s, "unknown");
395 cifs_show_cache_flavor(struct seq_file *s, struct cifs_sb_info *cifs_sb)
397 seq_puts(s, ",cache=");
399 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_STRICT_IO)
400 seq_puts(s, "strict");
401 else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO)
404 seq_puts(s, "loose");
408 cifs_show_nls(struct seq_file *s, struct nls_table *cur)
410 struct nls_table *def;
412 /* Display iocharset= option if it's not default charset */
413 def = load_nls_default();
415 seq_printf(s, ",iocharset=%s", cur->charset);
420 * cifs_show_options() is for displaying mount options in /proc/mounts.
421 * Not all settable options are displayed but most of the important
425 cifs_show_options(struct seq_file *s, struct dentry *root)
427 struct cifs_sb_info *cifs_sb = CIFS_SB(root->d_sb);
428 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
429 struct sockaddr *srcaddr;
430 srcaddr = (struct sockaddr *)&tcon->ses->server->srcaddr;
432 seq_show_option(s, "vers", tcon->ses->server->vals->version_string);
433 cifs_show_security(s, tcon->ses);
434 cifs_show_cache_flavor(s, cifs_sb);
436 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER)
437 seq_puts(s, ",multiuser");
438 else if (tcon->ses->user_name)
439 seq_show_option(s, "username", tcon->ses->user_name);
441 if (tcon->ses->domainName && tcon->ses->domainName[0] != 0)
442 seq_show_option(s, "domain", tcon->ses->domainName);
444 if (srcaddr->sa_family != AF_UNSPEC) {
445 struct sockaddr_in *saddr4;
446 struct sockaddr_in6 *saddr6;
447 saddr4 = (struct sockaddr_in *)srcaddr;
448 saddr6 = (struct sockaddr_in6 *)srcaddr;
449 if (srcaddr->sa_family == AF_INET6)
450 seq_printf(s, ",srcaddr=%pI6c",
452 else if (srcaddr->sa_family == AF_INET)
453 seq_printf(s, ",srcaddr=%pI4",
454 &saddr4->sin_addr.s_addr);
456 seq_printf(s, ",srcaddr=BAD-AF:%i",
457 (int)(srcaddr->sa_family));
460 seq_printf(s, ",uid=%u",
461 from_kuid_munged(&init_user_ns, cifs_sb->mnt_uid));
462 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)
463 seq_puts(s, ",forceuid");
465 seq_puts(s, ",noforceuid");
467 seq_printf(s, ",gid=%u",
468 from_kgid_munged(&init_user_ns, cifs_sb->mnt_gid));
469 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)
470 seq_puts(s, ",forcegid");
472 seq_puts(s, ",noforcegid");
474 cifs_show_address(s, tcon->ses->server);
477 seq_printf(s, ",file_mode=0%ho,dir_mode=0%ho",
478 cifs_sb->mnt_file_mode,
479 cifs_sb->mnt_dir_mode);
481 cifs_show_nls(s, cifs_sb->local_nls);
484 seq_puts(s, ",seal");
486 seq_puts(s, ",nocase");
487 if (tcon->local_lease)
488 seq_puts(s, ",locallease");
490 seq_puts(s, ",hard");
492 seq_puts(s, ",soft");
493 if (tcon->use_persistent)
494 seq_puts(s, ",persistenthandles");
495 else if (tcon->use_resilient)
496 seq_puts(s, ",resilienthandles");
497 if (tcon->posix_extensions)
498 seq_puts(s, ",posix");
499 else if (tcon->unix_ext)
500 seq_puts(s, ",unix");
502 seq_puts(s, ",nounix");
503 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_DFS)
504 seq_puts(s, ",nodfs");
505 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
506 seq_puts(s, ",posixpaths");
507 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)
508 seq_puts(s, ",setuids");
509 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UID_FROM_ACL)
510 seq_puts(s, ",idsfromsid");
511 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
512 seq_puts(s, ",serverino");
513 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RWPIDFORWARD)
514 seq_puts(s, ",rwpidforward");
515 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL)
516 seq_puts(s, ",forcemand");
517 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
518 seq_puts(s, ",nouser_xattr");
519 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR)
520 seq_puts(s, ",mapchars");
521 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SFM_CHR)
522 seq_puts(s, ",mapposix");
523 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)
525 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
526 seq_puts(s, ",nobrl");
527 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_HANDLE_CACHE)
528 seq_puts(s, ",nohandlecache");
529 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
530 seq_puts(s, ",cifsacl");
531 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)
532 seq_puts(s, ",dynperm");
533 if (root->d_sb->s_flags & SB_POSIXACL)
535 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS)
536 seq_puts(s, ",mfsymlinks");
537 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_FSCACHE)
539 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOSSYNC)
540 seq_puts(s, ",nostrictsync");
541 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM)
542 seq_puts(s, ",noperm");
543 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_BACKUPUID)
544 seq_printf(s, ",backupuid=%u",
545 from_kuid_munged(&init_user_ns,
546 cifs_sb->mnt_backupuid));
547 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_BACKUPGID)
548 seq_printf(s, ",backupgid=%u",
549 from_kgid_munged(&init_user_ns,
550 cifs_sb->mnt_backupgid));
552 seq_printf(s, ",rsize=%u", cifs_sb->rsize);
553 seq_printf(s, ",wsize=%u", cifs_sb->wsize);
554 seq_printf(s, ",bsize=%u", cifs_sb->bsize);
555 seq_printf(s, ",echo_interval=%lu",
556 tcon->ses->server->echo_interval / HZ);
557 if (tcon->snapshot_time)
558 seq_printf(s, ",snapshot=%llu", tcon->snapshot_time);
559 if (tcon->handle_timeout)
560 seq_printf(s, ",handletimeout=%u", tcon->handle_timeout);
561 /* convert actimeo and display it in seconds */
562 seq_printf(s, ",actimeo=%lu", cifs_sb->actimeo / HZ);
567 static void cifs_umount_begin(struct super_block *sb)
569 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
570 struct cifs_tcon *tcon;
575 tcon = cifs_sb_master_tcon(cifs_sb);
577 spin_lock(&cifs_tcp_ses_lock);
578 if ((tcon->tc_count > 1) || (tcon->tidStatus == CifsExiting)) {
579 /* we have other mounts to same share or we have
580 already tried to force umount this and woken up
581 all waiting network requests, nothing to do */
582 spin_unlock(&cifs_tcp_ses_lock);
584 } else if (tcon->tc_count == 1)
585 tcon->tidStatus = CifsExiting;
586 spin_unlock(&cifs_tcp_ses_lock);
588 /* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */
589 /* cancel_notify_requests(tcon); */
590 if (tcon->ses && tcon->ses->server) {
591 cifs_dbg(FYI, "wake up tasks now - umount begin not complete\n");
592 wake_up_all(&tcon->ses->server->request_q);
593 wake_up_all(&tcon->ses->server->response_q);
594 msleep(1); /* yield */
595 /* we have to kick the requests once more */
596 wake_up_all(&tcon->ses->server->response_q);
603 #ifdef CONFIG_CIFS_STATS2
604 static int cifs_show_stats(struct seq_file *s, struct dentry *root)
611 static int cifs_remount(struct super_block *sb, int *flags, char *data)
614 *flags |= SB_NODIRATIME;
618 static int cifs_drop_inode(struct inode *inode)
620 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
622 /* no serverino => unconditional eviction */
623 return !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) ||
624 generic_drop_inode(inode);
627 static const struct super_operations cifs_super_ops = {
628 .statfs = cifs_statfs,
629 .alloc_inode = cifs_alloc_inode,
630 .free_inode = cifs_free_inode,
631 .drop_inode = cifs_drop_inode,
632 .evict_inode = cifs_evict_inode,
633 /* .delete_inode = cifs_delete_inode, */ /* Do not need above
634 function unless later we add lazy close of inodes or unless the
635 kernel forgets to call us with the same number of releases (closes)
637 .show_options = cifs_show_options,
638 .umount_begin = cifs_umount_begin,
639 .remount_fs = cifs_remount,
640 #ifdef CONFIG_CIFS_STATS2
641 .show_stats = cifs_show_stats,
646 * Get root dentry from superblock according to prefix path mount option.
647 * Return dentry with refcount + 1 on success and NULL otherwise.
649 static struct dentry *
650 cifs_get_root(struct smb_vol *vol, struct super_block *sb)
652 struct dentry *dentry;
653 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
654 char *full_path = NULL;
658 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_USE_PREFIX_PATH)
659 return dget(sb->s_root);
661 full_path = cifs_build_path_to_root(vol, cifs_sb,
662 cifs_sb_master_tcon(cifs_sb), 0);
663 if (full_path == NULL)
664 return ERR_PTR(-ENOMEM);
666 cifs_dbg(FYI, "Get root dentry for %s\n", full_path);
668 sep = CIFS_DIR_SEP(cifs_sb);
669 dentry = dget(sb->s_root);
673 struct inode *dir = d_inode(dentry);
674 struct dentry *child;
678 dentry = ERR_PTR(-ENOENT);
681 if (!S_ISDIR(dir->i_mode)) {
683 dentry = ERR_PTR(-ENOTDIR);
687 /* skip separators */
694 while (*s && *s != sep)
697 child = lookup_one_len_unlocked(p, dentry, s - p);
700 } while (!IS_ERR(dentry));
705 static int cifs_set_super(struct super_block *sb, void *data)
707 struct cifs_mnt_data *mnt_data = data;
708 sb->s_fs_info = mnt_data->cifs_sb;
709 return set_anon_super(sb, NULL);
712 static struct dentry *
713 cifs_smb3_do_mount(struct file_system_type *fs_type,
714 int flags, const char *dev_name, void *data, bool is_smb3)
717 struct super_block *sb;
718 struct cifs_sb_info *cifs_sb;
719 struct smb_vol *volume_info;
720 struct cifs_mnt_data mnt_data;
724 * Prints in Kernel / CIFS log the attempted mount operation
725 * If CIFS_DEBUG && cifs_FYI
728 cifs_dbg(FYI, "Devname: %s flags: %d\n", dev_name, flags);
730 cifs_info("Attempting to mount %s\n", dev_name);
732 volume_info = cifs_get_volume_info((char *)data, dev_name, is_smb3);
733 if (IS_ERR(volume_info))
734 return ERR_CAST(volume_info);
736 cifs_sb = kzalloc(sizeof(struct cifs_sb_info), GFP_KERNEL);
737 if (cifs_sb == NULL) {
738 root = ERR_PTR(-ENOMEM);
742 cifs_sb->mountdata = kstrndup(data, PAGE_SIZE, GFP_KERNEL);
743 if (cifs_sb->mountdata == NULL) {
744 root = ERR_PTR(-ENOMEM);
748 rc = cifs_setup_cifs_sb(volume_info, cifs_sb);
754 rc = cifs_mount(cifs_sb, volume_info);
756 if (!(flags & SB_SILENT))
757 cifs_dbg(VFS, "cifs_mount failed w/return code = %d\n",
763 mnt_data.vol = volume_info;
764 mnt_data.cifs_sb = cifs_sb;
765 mnt_data.flags = flags;
767 /* BB should we make this contingent on mount parm? */
768 flags |= SB_NODIRATIME | SB_NOATIME;
770 sb = sget(fs_type, cifs_match_super, cifs_set_super, flags, &mnt_data);
773 cifs_umount(cifs_sb);
778 cifs_dbg(FYI, "Use existing superblock\n");
779 cifs_umount(cifs_sb);
781 rc = cifs_read_super(sb);
787 sb->s_flags |= SB_ACTIVE;
790 root = cifs_get_root(volume_info, sb);
794 cifs_dbg(FYI, "dentry root is: %p\n", root);
798 deactivate_locked_super(sb);
800 cifs_cleanup_volume_info(volume_info);
804 kfree(cifs_sb->prepath);
805 kfree(cifs_sb->mountdata);
808 unload_nls(volume_info->local_nls);
812 static struct dentry *
813 smb3_do_mount(struct file_system_type *fs_type,
814 int flags, const char *dev_name, void *data)
816 return cifs_smb3_do_mount(fs_type, flags, dev_name, data, true);
819 static struct dentry *
820 cifs_do_mount(struct file_system_type *fs_type,
821 int flags, const char *dev_name, void *data)
823 return cifs_smb3_do_mount(fs_type, flags, dev_name, data, false);
827 cifs_loose_read_iter(struct kiocb *iocb, struct iov_iter *iter)
830 struct inode *inode = file_inode(iocb->ki_filp);
832 if (iocb->ki_filp->f_flags & O_DIRECT)
833 return cifs_user_readv(iocb, iter);
835 rc = cifs_revalidate_mapping(inode);
839 return generic_file_read_iter(iocb, iter);
842 static ssize_t cifs_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
844 struct inode *inode = file_inode(iocb->ki_filp);
845 struct cifsInodeInfo *cinode = CIFS_I(inode);
849 if (iocb->ki_filp->f_flags & O_DIRECT) {
850 written = cifs_user_writev(iocb, from);
851 if (written > 0 && CIFS_CACHE_READ(cinode)) {
852 cifs_zap_mapping(inode);
854 "Set no oplock for inode=%p after a write operation\n",
861 written = cifs_get_writer(cinode);
865 written = generic_file_write_iter(iocb, from);
867 if (CIFS_CACHE_WRITE(CIFS_I(inode)))
870 rc = filemap_fdatawrite(inode->i_mapping);
872 cifs_dbg(FYI, "cifs_file_write_iter: %d rc on %p inode\n",
876 cifs_put_writer(cinode);
880 static loff_t cifs_llseek(struct file *file, loff_t offset, int whence)
882 struct cifsFileInfo *cfile = file->private_data;
883 struct cifs_tcon *tcon;
886 * whence == SEEK_END || SEEK_DATA || SEEK_HOLE => we must revalidate
887 * the cached file length
889 if (whence != SEEK_SET && whence != SEEK_CUR) {
891 struct inode *inode = file_inode(file);
894 * We need to be sure that all dirty pages are written and the
895 * server has the newest file length.
897 if (!CIFS_CACHE_READ(CIFS_I(inode)) && inode->i_mapping &&
898 inode->i_mapping->nrpages != 0) {
899 rc = filemap_fdatawait(inode->i_mapping);
901 mapping_set_error(inode->i_mapping, rc);
906 * Some applications poll for the file length in this strange
907 * way so we must seek to end on non-oplocked files by
908 * setting the revalidate time to zero.
910 CIFS_I(inode)->time = 0;
912 rc = cifs_revalidate_file_attr(file);
916 if (cfile && cfile->tlink) {
917 tcon = tlink_tcon(cfile->tlink);
918 if (tcon->ses->server->ops->llseek)
919 return tcon->ses->server->ops->llseek(file, tcon,
922 return generic_file_llseek(file, offset, whence);
926 cifs_setlease(struct file *file, long arg, struct file_lock **lease, void **priv)
929 * Note that this is called by vfs setlease with i_lock held to
930 * protect *lease from going away.
932 struct inode *inode = file_inode(file);
933 struct cifsFileInfo *cfile = file->private_data;
935 if (!(S_ISREG(inode->i_mode)))
938 /* Check if file is oplocked if this is request for new lease */
939 if (arg == F_UNLCK ||
940 ((arg == F_RDLCK) && CIFS_CACHE_READ(CIFS_I(inode))) ||
941 ((arg == F_WRLCK) && CIFS_CACHE_WRITE(CIFS_I(inode))))
942 return generic_setlease(file, arg, lease, priv);
943 else if (tlink_tcon(cfile->tlink)->local_lease &&
944 !CIFS_CACHE_READ(CIFS_I(inode)))
946 * If the server claims to support oplock on this file, then we
947 * still need to check oplock even if the local_lease mount
948 * option is set, but there are servers which do not support
949 * oplock for which this mount option may be useful if the user
950 * knows that the file won't be changed on the server by anyone
953 return generic_setlease(file, arg, lease, priv);
958 struct file_system_type cifs_fs_type = {
959 .owner = THIS_MODULE,
961 .mount = cifs_do_mount,
962 .kill_sb = cifs_kill_sb,
965 MODULE_ALIAS_FS("cifs");
967 static struct file_system_type smb3_fs_type = {
968 .owner = THIS_MODULE,
970 .mount = smb3_do_mount,
971 .kill_sb = cifs_kill_sb,
974 MODULE_ALIAS_FS("smb3");
975 MODULE_ALIAS("smb3");
977 const struct inode_operations cifs_dir_inode_ops = {
978 .create = cifs_create,
979 .atomic_open = cifs_atomic_open,
980 .lookup = cifs_lookup,
981 .getattr = cifs_getattr,
982 .unlink = cifs_unlink,
983 .link = cifs_hardlink,
986 .rename = cifs_rename2,
987 .permission = cifs_permission,
988 .setattr = cifs_setattr,
989 .symlink = cifs_symlink,
991 .listxattr = cifs_listxattr,
994 const struct inode_operations cifs_file_inode_ops = {
995 .setattr = cifs_setattr,
996 .getattr = cifs_getattr,
997 .permission = cifs_permission,
998 .listxattr = cifs_listxattr,
999 .fiemap = cifs_fiemap,
1002 const struct inode_operations cifs_symlink_inode_ops = {
1003 .get_link = cifs_get_link,
1004 .permission = cifs_permission,
1005 .listxattr = cifs_listxattr,
1008 static loff_t cifs_remap_file_range(struct file *src_file, loff_t off,
1009 struct file *dst_file, loff_t destoff, loff_t len,
1010 unsigned int remap_flags)
1012 struct inode *src_inode = file_inode(src_file);
1013 struct inode *target_inode = file_inode(dst_file);
1014 struct cifsFileInfo *smb_file_src = src_file->private_data;
1015 struct cifsFileInfo *smb_file_target;
1016 struct cifs_tcon *target_tcon;
1020 if (remap_flags & ~(REMAP_FILE_DEDUP | REMAP_FILE_ADVISORY))
1023 cifs_dbg(FYI, "clone range\n");
1027 if (!src_file->private_data || !dst_file->private_data) {
1029 cifs_dbg(VFS, "missing cifsFileInfo on copy range src file\n");
1033 smb_file_target = dst_file->private_data;
1034 target_tcon = tlink_tcon(smb_file_target->tlink);
1037 * Note: cifs case is easier than btrfs since server responsible for
1038 * checks for proper open modes and file type and if it wants
1039 * server could even support copy of range where source = target
1041 lock_two_nondirectories(target_inode, src_inode);
1044 len = src_inode->i_size - off;
1046 cifs_dbg(FYI, "about to flush pages\n");
1047 /* should we flush first and last page first */
1048 truncate_inode_pages_range(&target_inode->i_data, destoff,
1049 PAGE_ALIGN(destoff + len)-1);
1051 if (target_tcon->ses->server->ops->duplicate_extents)
1052 rc = target_tcon->ses->server->ops->duplicate_extents(xid,
1053 smb_file_src, smb_file_target, off, len, destoff);
1057 /* force revalidate of size and timestamps of target file now
1058 that target is updated on the server */
1059 CIFS_I(target_inode)->time = 0;
1060 /* although unlocking in the reverse order from locking is not
1061 strictly necessary here it is a little cleaner to be consistent */
1062 unlock_two_nondirectories(src_inode, target_inode);
1065 return rc < 0 ? rc : len;
1068 ssize_t cifs_file_copychunk_range(unsigned int xid,
1069 struct file *src_file, loff_t off,
1070 struct file *dst_file, loff_t destoff,
1071 size_t len, unsigned int flags)
1073 struct inode *src_inode = file_inode(src_file);
1074 struct inode *target_inode = file_inode(dst_file);
1075 struct cifsFileInfo *smb_file_src;
1076 struct cifsFileInfo *smb_file_target;
1077 struct cifs_tcon *src_tcon;
1078 struct cifs_tcon *target_tcon;
1081 cifs_dbg(FYI, "copychunk range\n");
1083 if (!src_file->private_data || !dst_file->private_data) {
1085 cifs_dbg(VFS, "missing cifsFileInfo on copy range src file\n");
1090 smb_file_target = dst_file->private_data;
1091 smb_file_src = src_file->private_data;
1092 src_tcon = tlink_tcon(smb_file_src->tlink);
1093 target_tcon = tlink_tcon(smb_file_target->tlink);
1095 if (src_tcon->ses != target_tcon->ses) {
1096 cifs_dbg(VFS, "source and target of copy not on same server\n");
1101 * Note: cifs case is easier than btrfs since server responsible for
1102 * checks for proper open modes and file type and if it wants
1103 * server could even support copy of range where source = target
1105 lock_two_nondirectories(target_inode, src_inode);
1107 cifs_dbg(FYI, "about to flush pages\n");
1108 /* should we flush first and last page first */
1109 truncate_inode_pages(&target_inode->i_data, 0);
1111 if (target_tcon->ses->server->ops->copychunk_range)
1112 rc = target_tcon->ses->server->ops->copychunk_range(xid,
1113 smb_file_src, smb_file_target, off, len, destoff);
1117 /* force revalidate of size and timestamps of target file now
1118 * that target is updated on the server
1120 CIFS_I(target_inode)->time = 0;
1121 /* although unlocking in the reverse order from locking is not
1122 * strictly necessary here it is a little cleaner to be consistent
1124 unlock_two_nondirectories(src_inode, target_inode);
1131 * Directory operations under CIFS/SMB2/SMB3 are synchronous, so fsync()
1132 * is a dummy operation.
1134 static int cifs_dir_fsync(struct file *file, loff_t start, loff_t end, int datasync)
1136 cifs_dbg(FYI, "Sync directory - name: %pD datasync: 0x%x\n",
1142 static ssize_t cifs_copy_file_range(struct file *src_file, loff_t off,
1143 struct file *dst_file, loff_t destoff,
1144 size_t len, unsigned int flags)
1146 unsigned int xid = get_xid();
1149 rc = cifs_file_copychunk_range(xid, src_file, off, dst_file, destoff,
1153 if (rc == -EOPNOTSUPP || rc == -EXDEV)
1154 rc = generic_copy_file_range(src_file, off, dst_file,
1155 destoff, len, flags);
1159 const struct file_operations cifs_file_ops = {
1160 .read_iter = cifs_loose_read_iter,
1161 .write_iter = cifs_file_write_iter,
1163 .release = cifs_close,
1165 .fsync = cifs_fsync,
1166 .flush = cifs_flush,
1167 .mmap = cifs_file_mmap,
1168 .splice_read = generic_file_splice_read,
1169 .splice_write = iter_file_splice_write,
1170 .llseek = cifs_llseek,
1171 .unlocked_ioctl = cifs_ioctl,
1172 .copy_file_range = cifs_copy_file_range,
1173 .remap_file_range = cifs_remap_file_range,
1174 .setlease = cifs_setlease,
1175 .fallocate = cifs_fallocate,
1178 const struct file_operations cifs_file_strict_ops = {
1179 .read_iter = cifs_strict_readv,
1180 .write_iter = cifs_strict_writev,
1182 .release = cifs_close,
1184 .fsync = cifs_strict_fsync,
1185 .flush = cifs_flush,
1186 .mmap = cifs_file_strict_mmap,
1187 .splice_read = generic_file_splice_read,
1188 .splice_write = iter_file_splice_write,
1189 .llseek = cifs_llseek,
1190 .unlocked_ioctl = cifs_ioctl,
1191 .copy_file_range = cifs_copy_file_range,
1192 .remap_file_range = cifs_remap_file_range,
1193 .setlease = cifs_setlease,
1194 .fallocate = cifs_fallocate,
1197 const struct file_operations cifs_file_direct_ops = {
1198 .read_iter = cifs_direct_readv,
1199 .write_iter = cifs_direct_writev,
1201 .release = cifs_close,
1203 .fsync = cifs_fsync,
1204 .flush = cifs_flush,
1205 .mmap = cifs_file_mmap,
1206 .splice_read = generic_file_splice_read,
1207 .splice_write = iter_file_splice_write,
1208 .unlocked_ioctl = cifs_ioctl,
1209 .copy_file_range = cifs_copy_file_range,
1210 .remap_file_range = cifs_remap_file_range,
1211 .llseek = cifs_llseek,
1212 .setlease = cifs_setlease,
1213 .fallocate = cifs_fallocate,
1216 const struct file_operations cifs_file_nobrl_ops = {
1217 .read_iter = cifs_loose_read_iter,
1218 .write_iter = cifs_file_write_iter,
1220 .release = cifs_close,
1221 .fsync = cifs_fsync,
1222 .flush = cifs_flush,
1223 .mmap = cifs_file_mmap,
1224 .splice_read = generic_file_splice_read,
1225 .splice_write = iter_file_splice_write,
1226 .llseek = cifs_llseek,
1227 .unlocked_ioctl = cifs_ioctl,
1228 .copy_file_range = cifs_copy_file_range,
1229 .remap_file_range = cifs_remap_file_range,
1230 .setlease = cifs_setlease,
1231 .fallocate = cifs_fallocate,
1234 const struct file_operations cifs_file_strict_nobrl_ops = {
1235 .read_iter = cifs_strict_readv,
1236 .write_iter = cifs_strict_writev,
1238 .release = cifs_close,
1239 .fsync = cifs_strict_fsync,
1240 .flush = cifs_flush,
1241 .mmap = cifs_file_strict_mmap,
1242 .splice_read = generic_file_splice_read,
1243 .splice_write = iter_file_splice_write,
1244 .llseek = cifs_llseek,
1245 .unlocked_ioctl = cifs_ioctl,
1246 .copy_file_range = cifs_copy_file_range,
1247 .remap_file_range = cifs_remap_file_range,
1248 .setlease = cifs_setlease,
1249 .fallocate = cifs_fallocate,
1252 const struct file_operations cifs_file_direct_nobrl_ops = {
1253 .read_iter = cifs_direct_readv,
1254 .write_iter = cifs_direct_writev,
1256 .release = cifs_close,
1257 .fsync = cifs_fsync,
1258 .flush = cifs_flush,
1259 .mmap = cifs_file_mmap,
1260 .splice_read = generic_file_splice_read,
1261 .splice_write = iter_file_splice_write,
1262 .unlocked_ioctl = cifs_ioctl,
1263 .copy_file_range = cifs_copy_file_range,
1264 .remap_file_range = cifs_remap_file_range,
1265 .llseek = cifs_llseek,
1266 .setlease = cifs_setlease,
1267 .fallocate = cifs_fallocate,
1270 const struct file_operations cifs_dir_ops = {
1271 .iterate_shared = cifs_readdir,
1272 .release = cifs_closedir,
1273 .read = generic_read_dir,
1274 .unlocked_ioctl = cifs_ioctl,
1275 .copy_file_range = cifs_copy_file_range,
1276 .remap_file_range = cifs_remap_file_range,
1277 .llseek = generic_file_llseek,
1278 .fsync = cifs_dir_fsync,
1282 cifs_init_once(void *inode)
1284 struct cifsInodeInfo *cifsi = inode;
1286 inode_init_once(&cifsi->vfs_inode);
1287 init_rwsem(&cifsi->lock_sem);
1291 cifs_init_inodecache(void)
1293 cifs_inode_cachep = kmem_cache_create("cifs_inode_cache",
1294 sizeof(struct cifsInodeInfo),
1295 0, (SLAB_RECLAIM_ACCOUNT|
1296 SLAB_MEM_SPREAD|SLAB_ACCOUNT),
1298 if (cifs_inode_cachep == NULL)
1305 cifs_destroy_inodecache(void)
1308 * Make sure all delayed rcu free inodes are flushed before we
1312 kmem_cache_destroy(cifs_inode_cachep);
1316 cifs_init_request_bufs(void)
1319 * SMB2 maximum header size is bigger than CIFS one - no problems to
1320 * allocate some more bytes for CIFS.
1322 size_t max_hdr_size = MAX_SMB2_HDR_SIZE;
1324 if (CIFSMaxBufSize < 8192) {
1325 /* Buffer size can not be smaller than 2 * PATH_MAX since maximum
1326 Unicode path name has to fit in any SMB/CIFS path based frames */
1327 CIFSMaxBufSize = 8192;
1328 } else if (CIFSMaxBufSize > 1024*127) {
1329 CIFSMaxBufSize = 1024 * 127;
1331 CIFSMaxBufSize &= 0x1FE00; /* Round size to even 512 byte mult*/
1334 cifs_dbg(VFS, "CIFSMaxBufSize %d 0x%x\n",
1335 CIFSMaxBufSize, CIFSMaxBufSize);
1337 cifs_req_cachep = kmem_cache_create_usercopy("cifs_request",
1338 CIFSMaxBufSize + max_hdr_size, 0,
1339 SLAB_HWCACHE_ALIGN, 0,
1340 CIFSMaxBufSize + max_hdr_size,
1342 if (cifs_req_cachep == NULL)
1345 if (cifs_min_rcv < 1)
1347 else if (cifs_min_rcv > 64) {
1349 cifs_dbg(VFS, "cifs_min_rcv set to maximum (64)\n");
1352 cifs_req_poolp = mempool_create_slab_pool(cifs_min_rcv,
1355 if (cifs_req_poolp == NULL) {
1356 kmem_cache_destroy(cifs_req_cachep);
1359 /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and
1360 almost all handle based requests (but not write response, nor is it
1361 sufficient for path based requests). A smaller size would have
1362 been more efficient (compacting multiple slab items on one 4k page)
1363 for the case in which debug was on, but this larger size allows
1364 more SMBs to use small buffer alloc and is still much more
1365 efficient to alloc 1 per page off the slab compared to 17K (5page)
1366 alloc of large cifs buffers even when page debugging is on */
1367 cifs_sm_req_cachep = kmem_cache_create_usercopy("cifs_small_rq",
1368 MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN,
1369 0, MAX_CIFS_SMALL_BUFFER_SIZE, NULL);
1370 if (cifs_sm_req_cachep == NULL) {
1371 mempool_destroy(cifs_req_poolp);
1372 kmem_cache_destroy(cifs_req_cachep);
1376 if (cifs_min_small < 2)
1378 else if (cifs_min_small > 256) {
1379 cifs_min_small = 256;
1380 cifs_dbg(FYI, "cifs_min_small set to maximum (256)\n");
1383 cifs_sm_req_poolp = mempool_create_slab_pool(cifs_min_small,
1384 cifs_sm_req_cachep);
1386 if (cifs_sm_req_poolp == NULL) {
1387 mempool_destroy(cifs_req_poolp);
1388 kmem_cache_destroy(cifs_req_cachep);
1389 kmem_cache_destroy(cifs_sm_req_cachep);
1397 cifs_destroy_request_bufs(void)
1399 mempool_destroy(cifs_req_poolp);
1400 kmem_cache_destroy(cifs_req_cachep);
1401 mempool_destroy(cifs_sm_req_poolp);
1402 kmem_cache_destroy(cifs_sm_req_cachep);
1406 cifs_init_mids(void)
1408 cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids",
1409 sizeof(struct mid_q_entry), 0,
1410 SLAB_HWCACHE_ALIGN, NULL);
1411 if (cifs_mid_cachep == NULL)
1414 /* 3 is a reasonable minimum number of simultaneous operations */
1415 cifs_mid_poolp = mempool_create_slab_pool(3, cifs_mid_cachep);
1416 if (cifs_mid_poolp == NULL) {
1417 kmem_cache_destroy(cifs_mid_cachep);
1425 cifs_destroy_mids(void)
1427 mempool_destroy(cifs_mid_poolp);
1428 kmem_cache_destroy(cifs_mid_cachep);
1436 INIT_LIST_HEAD(&cifs_tcp_ses_list);
1437 #ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
1438 INIT_LIST_HEAD(&GlobalDnotifyReqList);
1439 INIT_LIST_HEAD(&GlobalDnotifyRsp_Q);
1440 #endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
1442 * Initialize Global counters
1444 atomic_set(&sesInfoAllocCount, 0);
1445 atomic_set(&tconInfoAllocCount, 0);
1446 atomic_set(&tcpSesAllocCount, 0);
1447 atomic_set(&tcpSesReconnectCount, 0);
1448 atomic_set(&tconInfoReconnectCount, 0);
1450 atomic_set(&bufAllocCount, 0);
1451 atomic_set(&smBufAllocCount, 0);
1452 #ifdef CONFIG_CIFS_STATS2
1453 atomic_set(&totBufAllocCount, 0);
1454 atomic_set(&totSmBufAllocCount, 0);
1455 if (slow_rsp_threshold < 1)
1456 cifs_dbg(FYI, "slow_response_threshold msgs disabled\n");
1457 else if (slow_rsp_threshold > 32767)
1459 "slow response threshold set higher than recommended (0 to 32767)\n");
1460 #endif /* CONFIG_CIFS_STATS2 */
1462 atomic_set(&midCount, 0);
1463 GlobalCurrentXid = 0;
1464 GlobalTotalActiveXid = 0;
1465 GlobalMaxActiveXid = 0;
1466 spin_lock_init(&cifs_tcp_ses_lock);
1467 spin_lock_init(&GlobalMid_Lock);
1469 cifs_lock_secret = get_random_u32();
1471 if (cifs_max_pending < 2) {
1472 cifs_max_pending = 2;
1473 cifs_dbg(FYI, "cifs_max_pending set to min of 2\n");
1474 } else if (cifs_max_pending > CIFS_MAX_REQ) {
1475 cifs_max_pending = CIFS_MAX_REQ;
1476 cifs_dbg(FYI, "cifs_max_pending set to max of %u\n",
1480 cifsiod_wq = alloc_workqueue("cifsiod", WQ_FREEZABLE|WQ_MEM_RECLAIM, 0);
1483 goto out_clean_proc;
1486 cifsoplockd_wq = alloc_workqueue("cifsoplockd",
1487 WQ_FREEZABLE|WQ_MEM_RECLAIM, 0);
1488 if (!cifsoplockd_wq) {
1490 goto out_destroy_cifsiod_wq;
1493 rc = cifs_fscache_register();
1495 goto out_destroy_cifsoplockd_wq;
1497 rc = cifs_init_inodecache();
1499 goto out_unreg_fscache;
1501 rc = cifs_init_mids();
1503 goto out_destroy_inodecache;
1505 rc = cifs_init_request_bufs();
1507 goto out_destroy_mids;
1509 #ifdef CONFIG_CIFS_DFS_UPCALL
1510 rc = dfs_cache_init();
1512 goto out_destroy_request_bufs;
1513 #endif /* CONFIG_CIFS_DFS_UPCALL */
1514 #ifdef CONFIG_CIFS_UPCALL
1515 rc = init_cifs_spnego();
1517 goto out_destroy_dfs_cache;
1518 #endif /* CONFIG_CIFS_UPCALL */
1520 #ifdef CONFIG_CIFS_ACL
1521 rc = init_cifs_idmap();
1523 goto out_register_key_type;
1524 #endif /* CONFIG_CIFS_ACL */
1526 rc = register_filesystem(&cifs_fs_type);
1528 goto out_init_cifs_idmap;
1530 rc = register_filesystem(&smb3_fs_type);
1532 unregister_filesystem(&cifs_fs_type);
1533 goto out_init_cifs_idmap;
1538 out_init_cifs_idmap:
1539 #ifdef CONFIG_CIFS_ACL
1541 out_register_key_type:
1543 #ifdef CONFIG_CIFS_UPCALL
1545 out_destroy_dfs_cache:
1547 #ifdef CONFIG_CIFS_DFS_UPCALL
1548 dfs_cache_destroy();
1549 out_destroy_request_bufs:
1551 cifs_destroy_request_bufs();
1553 cifs_destroy_mids();
1554 out_destroy_inodecache:
1555 cifs_destroy_inodecache();
1557 cifs_fscache_unregister();
1558 out_destroy_cifsoplockd_wq:
1559 destroy_workqueue(cifsoplockd_wq);
1560 out_destroy_cifsiod_wq:
1561 destroy_workqueue(cifsiod_wq);
1570 cifs_dbg(NOISY, "exit_smb3\n");
1571 unregister_filesystem(&cifs_fs_type);
1572 unregister_filesystem(&smb3_fs_type);
1573 cifs_dfs_release_automount_timer();
1574 #ifdef CONFIG_CIFS_ACL
1577 #ifdef CONFIG_CIFS_UPCALL
1580 #ifdef CONFIG_CIFS_DFS_UPCALL
1581 dfs_cache_destroy();
1583 cifs_destroy_request_bufs();
1584 cifs_destroy_mids();
1585 cifs_destroy_inodecache();
1586 cifs_fscache_unregister();
1587 destroy_workqueue(cifsoplockd_wq);
1588 destroy_workqueue(cifsiod_wq);
1592 MODULE_AUTHOR("Steve French");
1593 MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */
1595 ("VFS to access SMB3 servers e.g. Samba, Macs, Azure and Windows (and "
1596 "also older servers complying with the SNIA CIFS Specification)");
1597 MODULE_VERSION(CIFS_VERSION);
1598 MODULE_SOFTDEP("pre: des");
1599 MODULE_SOFTDEP("pre: ecb");
1600 MODULE_SOFTDEP("pre: hmac");
1601 MODULE_SOFTDEP("pre: md4");
1602 MODULE_SOFTDEP("pre: md5");
1603 MODULE_SOFTDEP("pre: nls");
1604 MODULE_SOFTDEP("pre: aes");
1605 MODULE_SOFTDEP("pre: cmac");
1606 MODULE_SOFTDEP("pre: sha256");
1607 MODULE_SOFTDEP("pre: sha512");
1608 MODULE_SOFTDEP("pre: aead2");
1609 MODULE_SOFTDEP("pre: ccm");
1610 module_init(init_cifs)
1611 module_exit(exit_cifs)