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>
41 #define DECLARE_GLOBALS_HERE
43 #include "cifsproto.h"
44 #include "cifs_debug.h"
45 #include "cifs_fs_sb.h"
47 #include <linux/key-type.h>
48 #include "cifs_spnego.h"
50 #define CIFS_MAGIC_NUMBER 0xFF534D42 /* the first four bytes of SMB PDUs */
55 unsigned int oplockEnabled
= 1;
56 unsigned int linuxExtEnabled
= 1;
57 unsigned int lookupCacheEnabled
= 1;
58 unsigned int multiuser_mount
= 0;
59 unsigned int global_secflags
= CIFSSEC_DEF
;
60 /* unsigned int ntlmv2_support = 0; */
61 unsigned int sign_CIFS_PDUs
= 1;
62 static const struct super_operations cifs_super_ops
;
63 unsigned int CIFSMaxBufSize
= CIFS_MAX_MSGSIZE
;
64 module_param(CIFSMaxBufSize
, int, 0);
65 MODULE_PARM_DESC(CIFSMaxBufSize
, "Network buffer size (not including header). "
66 "Default: 16384 Range: 8192 to 130048");
67 unsigned int cifs_min_rcv
= CIFS_MIN_RCV_POOL
;
68 module_param(cifs_min_rcv
, int, 0);
69 MODULE_PARM_DESC(cifs_min_rcv
, "Network buffers in pool. Default: 4 Range: "
71 unsigned int cifs_min_small
= 30;
72 module_param(cifs_min_small
, int, 0);
73 MODULE_PARM_DESC(cifs_min_small
, "Small network buffers in pool. Default: 30 "
75 unsigned int cifs_max_pending
= CIFS_MAX_REQ
;
76 module_param(cifs_max_pending
, int, 0);
77 MODULE_PARM_DESC(cifs_max_pending
, "Simultaneous requests to server. "
78 "Default: 50 Range: 2 to 256");
79 unsigned short echo_retries
= 5;
80 module_param(echo_retries
, ushort
, 0644);
81 MODULE_PARM_DESC(echo_retries
, "Number of echo attempts before giving up and "
82 "reconnecting server. Default: 5. 0 means "
84 extern mempool_t
*cifs_sm_req_poolp
;
85 extern mempool_t
*cifs_req_poolp
;
86 extern mempool_t
*cifs_mid_poolp
;
89 cifs_sb_active(struct super_block
*sb
)
91 struct cifs_sb_info
*server
= CIFS_SB(sb
);
93 if (atomic_inc_return(&server
->active
) == 1)
94 atomic_inc(&sb
->s_active
);
98 cifs_sb_deactive(struct super_block
*sb
)
100 struct cifs_sb_info
*server
= CIFS_SB(sb
);
102 if (atomic_dec_and_test(&server
->active
))
103 deactivate_super(sb
);
107 cifs_read_super(struct super_block
*sb
, struct smb_vol
*volume_info
,
108 const char *devname
, int silent
)
111 struct cifs_sb_info
*cifs_sb
;
114 cifs_sb
= CIFS_SB(sb
);
116 spin_lock_init(&cifs_sb
->tlink_tree_lock
);
117 cifs_sb
->tlink_tree
= RB_ROOT
;
119 rc
= bdi_setup_and_register(&cifs_sb
->bdi
, "cifs", BDI_CAP_MAP_COPY
);
123 cifs_sb
->bdi
.ra_pages
= default_backing_dev_info
.ra_pages
;
125 rc
= cifs_mount(sb
, cifs_sb
, volume_info
, devname
);
129 cERROR(1, "cifs_mount failed w/return code = %d", rc
);
130 goto out_mount_failed
;
133 sb
->s_magic
= CIFS_MAGIC_NUMBER
;
134 sb
->s_op
= &cifs_super_ops
;
135 sb
->s_bdi
= &cifs_sb
->bdi
;
136 sb
->s_blocksize
= CIFS_MAX_MSGSIZE
;
137 sb
->s_blocksize_bits
= 14; /* default 2**14 = CIFS_MAX_MSGSIZE */
138 inode
= cifs_root_iget(sb
);
146 sb
->s_root
= d_alloc_root(inode
);
153 /* do that *after* d_alloc_root() - we want NULL ->d_op for root here */
154 if (cifs_sb_master_tcon(cifs_sb
)->nocase
)
155 sb
->s_d_op
= &cifs_ci_dentry_ops
;
157 sb
->s_d_op
= &cifs_dentry_ops
;
159 #ifdef CIFS_NFSD_EXPORT
160 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_SERVER_INUM
) {
161 cFYI(1, "export ops supported");
162 sb
->s_export_op
= &cifs_export_ops
;
164 #endif /* CIFS_NFSD_EXPORT */
169 cERROR(1, "cifs_read_super: get root inode failed");
173 cifs_umount(sb
, cifs_sb
);
176 bdi_destroy(&cifs_sb
->bdi
);
181 cifs_put_super(struct super_block
*sb
)
184 struct cifs_sb_info
*cifs_sb
;
186 cFYI(1, "In cifs_put_super");
187 cifs_sb
= CIFS_SB(sb
);
188 if (cifs_sb
== NULL
) {
189 cFYI(1, "Empty cifs superblock info passed to unmount");
193 rc
= cifs_umount(sb
, cifs_sb
);
195 cERROR(1, "cifs_umount failed with return code %d", rc
);
196 if (cifs_sb
->mountdata
) {
197 kfree(cifs_sb
->mountdata
);
198 cifs_sb
->mountdata
= NULL
;
201 unload_nls(cifs_sb
->local_nls
);
202 bdi_destroy(&cifs_sb
->bdi
);
207 cifs_statfs(struct dentry
*dentry
, struct kstatfs
*buf
)
209 struct super_block
*sb
= dentry
->d_sb
;
210 struct cifs_sb_info
*cifs_sb
= CIFS_SB(sb
);
211 struct cifs_tcon
*tcon
= cifs_sb_master_tcon(cifs_sb
);
212 int rc
= -EOPNOTSUPP
;
217 buf
->f_type
= CIFS_MAGIC_NUMBER
;
220 * PATH_MAX may be too long - it would presumably be total path,
221 * but note that some servers (includinng Samba 3) have a shorter
224 * Instead could get the real value via SMB_QUERY_FS_ATTRIBUTE_INFO.
226 buf
->f_namelen
= PATH_MAX
;
227 buf
->f_files
= 0; /* undefined */
228 buf
->f_ffree
= 0; /* unlimited */
231 * We could add a second check for a QFS Unix capability bit
233 if ((tcon
->ses
->capabilities
& CAP_UNIX
) &&
234 (CIFS_POSIX_EXTENSIONS
& le64_to_cpu(tcon
->fsUnixInfo
.Capability
)))
235 rc
= CIFSSMBQFSPosixInfo(xid
, tcon
, buf
);
238 * Only need to call the old QFSInfo if failed on newer one,
241 if (rc
&& (tcon
->ses
->capabilities
& CAP_NT_SMBS
))
242 rc
= CIFSSMBQFSInfo(xid
, tcon
, buf
);
245 * Some old Windows servers also do not support level 103, retry with
246 * older level one if old server failed the previous call or we
247 * bypassed it because we detected that this was an older LANMAN sess
250 rc
= SMBOldQFSInfo(xid
, tcon
, buf
);
256 static int cifs_permission(struct inode
*inode
, int mask
, unsigned int flags
)
258 struct cifs_sb_info
*cifs_sb
;
260 if (flags
& IPERM_FLAG_RCU
)
263 cifs_sb
= CIFS_SB(inode
->i_sb
);
265 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_NO_PERM
) {
266 if ((mask
& MAY_EXEC
) && !execute_ok(inode
))
270 } else /* file mode might have been restricted at mount time
271 on the client (above and beyond ACL on servers) for
272 servers which do not support setting and viewing mode bits,
273 so allowing client to check permissions is useful */
274 return generic_permission(inode
, mask
, flags
, NULL
);
277 static struct kmem_cache
*cifs_inode_cachep
;
278 static struct kmem_cache
*cifs_req_cachep
;
279 static struct kmem_cache
*cifs_mid_cachep
;
280 static struct kmem_cache
*cifs_sm_req_cachep
;
281 mempool_t
*cifs_sm_req_poolp
;
282 mempool_t
*cifs_req_poolp
;
283 mempool_t
*cifs_mid_poolp
;
285 static struct inode
*
286 cifs_alloc_inode(struct super_block
*sb
)
288 struct cifsInodeInfo
*cifs_inode
;
289 cifs_inode
= kmem_cache_alloc(cifs_inode_cachep
, GFP_KERNEL
);
292 cifs_inode
->cifsAttrs
= 0x20; /* default */
293 cifs_inode
->time
= 0;
294 /* Until the file is open and we have gotten oplock
295 info back from the server, can not assume caching of
296 file data or metadata */
297 cifs_set_oplock_level(cifs_inode
, 0);
298 cifs_inode
->delete_pending
= false;
299 cifs_inode
->invalid_mapping
= false;
300 cifs_inode
->vfs_inode
.i_blkbits
= 14; /* 2**14 = CIFS_MAX_MSGSIZE */
301 cifs_inode
->server_eof
= 0;
302 cifs_inode
->uniqueid
= 0;
303 cifs_inode
->createtime
= 0;
305 /* Can not set i_flags here - they get immediately overwritten
306 to zero by the VFS */
307 /* cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME;*/
308 INIT_LIST_HEAD(&cifs_inode
->openFileList
);
309 return &cifs_inode
->vfs_inode
;
312 static void cifs_i_callback(struct rcu_head
*head
)
314 struct inode
*inode
= container_of(head
, struct inode
, i_rcu
);
315 INIT_LIST_HEAD(&inode
->i_dentry
);
316 kmem_cache_free(cifs_inode_cachep
, CIFS_I(inode
));
320 cifs_destroy_inode(struct inode
*inode
)
322 call_rcu(&inode
->i_rcu
, cifs_i_callback
);
326 cifs_evict_inode(struct inode
*inode
)
328 truncate_inode_pages(&inode
->i_data
, 0);
329 end_writeback(inode
);
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_printf(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_printf(s
, "(unknown)");
356 cifs_show_security(struct seq_file
*s
, struct TCP_Server_Info
*server
)
358 seq_printf(s
, ",sec=");
360 switch (server
->secType
) {
362 seq_printf(s
, "lanman");
365 seq_printf(s
, "ntlmv2");
368 seq_printf(s
, "ntlm");
371 seq_printf(s
, "krb5");
374 seq_printf(s
, "ntlmssp");
377 /* shouldn't ever happen */
378 seq_printf(s
, "unknown");
382 if (server
->sec_mode
& (SECMODE_SIGN_REQUIRED
| SECMODE_SIGN_ENABLED
))
387 * cifs_show_options() is for displaying mount options in /proc/mounts.
388 * Not all settable options are displayed but most of the important
392 cifs_show_options(struct seq_file
*s
, struct vfsmount
*m
)
394 struct cifs_sb_info
*cifs_sb
= CIFS_SB(m
->mnt_sb
);
395 struct cifs_tcon
*tcon
= cifs_sb_master_tcon(cifs_sb
);
396 struct sockaddr
*srcaddr
;
397 srcaddr
= (struct sockaddr
*)&tcon
->ses
->server
->srcaddr
;
399 cifs_show_security(s
, tcon
->ses
->server
);
401 seq_printf(s
, ",unc=%s", tcon
->treeName
);
403 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_MULTIUSER
)
404 seq_printf(s
, ",multiuser");
405 else if (tcon
->ses
->user_name
)
406 seq_printf(s
, ",username=%s", tcon
->ses
->user_name
);
408 if (tcon
->ses
->domainName
)
409 seq_printf(s
, ",domain=%s", tcon
->ses
->domainName
);
411 if (srcaddr
->sa_family
!= AF_UNSPEC
) {
412 struct sockaddr_in
*saddr4
;
413 struct sockaddr_in6
*saddr6
;
414 saddr4
= (struct sockaddr_in
*)srcaddr
;
415 saddr6
= (struct sockaddr_in6
*)srcaddr
;
416 if (srcaddr
->sa_family
== AF_INET6
)
417 seq_printf(s
, ",srcaddr=%pI6c",
419 else if (srcaddr
->sa_family
== AF_INET
)
420 seq_printf(s
, ",srcaddr=%pI4",
421 &saddr4
->sin_addr
.s_addr
);
423 seq_printf(s
, ",srcaddr=BAD-AF:%i",
424 (int)(srcaddr
->sa_family
));
427 seq_printf(s
, ",uid=%d", cifs_sb
->mnt_uid
);
428 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_OVERR_UID
)
429 seq_printf(s
, ",forceuid");
431 seq_printf(s
, ",noforceuid");
433 seq_printf(s
, ",gid=%d", cifs_sb
->mnt_gid
);
434 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_OVERR_GID
)
435 seq_printf(s
, ",forcegid");
437 seq_printf(s
, ",noforcegid");
439 cifs_show_address(s
, tcon
->ses
->server
);
442 seq_printf(s
, ",file_mode=0%o,dir_mode=0%o",
443 cifs_sb
->mnt_file_mode
,
444 cifs_sb
->mnt_dir_mode
);
446 seq_printf(s
, ",seal");
448 seq_printf(s
, ",nocase");
450 seq_printf(s
, ",hard");
452 seq_printf(s
, ",unix");
454 seq_printf(s
, ",nounix");
455 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_POSIX_PATHS
)
456 seq_printf(s
, ",posixpaths");
457 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_SET_UID
)
458 seq_printf(s
, ",setuids");
459 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_SERVER_INUM
)
460 seq_printf(s
, ",serverino");
461 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_RWPIDFORWARD
)
462 seq_printf(s
, ",rwpidforward");
463 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_NOPOSIXBRL
)
464 seq_printf(s
, ",forcemand");
465 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_DIRECT_IO
)
466 seq_printf(s
, ",directio");
467 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_NO_XATTR
)
468 seq_printf(s
, ",nouser_xattr");
469 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_MAP_SPECIAL_CHR
)
470 seq_printf(s
, ",mapchars");
471 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_UNX_EMUL
)
472 seq_printf(s
, ",sfu");
473 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_NO_BRL
)
474 seq_printf(s
, ",nobrl");
475 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_CIFS_ACL
)
476 seq_printf(s
, ",cifsacl");
477 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_DYNPERM
)
478 seq_printf(s
, ",dynperm");
479 if (m
->mnt_sb
->s_flags
& MS_POSIXACL
)
480 seq_printf(s
, ",acl");
481 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_MF_SYMLINKS
)
482 seq_printf(s
, ",mfsymlinks");
483 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_FSCACHE
)
484 seq_printf(s
, ",fsc");
486 seq_printf(s
, ",rsize=%d", cifs_sb
->rsize
);
487 seq_printf(s
, ",wsize=%d", cifs_sb
->wsize
);
488 /* convert actimeo and display it in seconds */
489 seq_printf(s
, ",actimeo=%lu", cifs_sb
->actimeo
/ HZ
);
494 static void cifs_umount_begin(struct super_block
*sb
)
496 struct cifs_sb_info
*cifs_sb
= CIFS_SB(sb
);
497 struct cifs_tcon
*tcon
;
502 tcon
= cifs_sb_master_tcon(cifs_sb
);
504 spin_lock(&cifs_tcp_ses_lock
);
505 if ((tcon
->tc_count
> 1) || (tcon
->tidStatus
== CifsExiting
)) {
506 /* we have other mounts to same share or we have
507 already tried to force umount this and woken up
508 all waiting network requests, nothing to do */
509 spin_unlock(&cifs_tcp_ses_lock
);
511 } else if (tcon
->tc_count
== 1)
512 tcon
->tidStatus
= CifsExiting
;
513 spin_unlock(&cifs_tcp_ses_lock
);
515 /* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */
516 /* cancel_notify_requests(tcon); */
517 if (tcon
->ses
&& tcon
->ses
->server
) {
518 cFYI(1, "wake up tasks now - umount begin not complete");
519 wake_up_all(&tcon
->ses
->server
->request_q
);
520 wake_up_all(&tcon
->ses
->server
->response_q
);
521 msleep(1); /* yield */
522 /* we have to kick the requests once more */
523 wake_up_all(&tcon
->ses
->server
->response_q
);
530 #ifdef CONFIG_CIFS_STATS2
531 static int cifs_show_stats(struct seq_file
*s
, struct vfsmount
*mnt
)
538 static int cifs_remount(struct super_block
*sb
, int *flags
, char *data
)
540 *flags
|= MS_NODIRATIME
;
544 static int cifs_drop_inode(struct inode
*inode
)
546 struct cifs_sb_info
*cifs_sb
= CIFS_SB(inode
->i_sb
);
548 /* no serverino => unconditional eviction */
549 return !(cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_SERVER_INUM
) ||
550 generic_drop_inode(inode
);
553 static const struct super_operations cifs_super_ops
= {
554 .put_super
= cifs_put_super
,
555 .statfs
= cifs_statfs
,
556 .alloc_inode
= cifs_alloc_inode
,
557 .destroy_inode
= cifs_destroy_inode
,
558 .drop_inode
= cifs_drop_inode
,
559 .evict_inode
= cifs_evict_inode
,
560 /* .delete_inode = cifs_delete_inode, */ /* Do not need above
561 function unless later we add lazy close of inodes or unless the
562 kernel forgets to call us with the same number of releases (closes)
564 .show_options
= cifs_show_options
,
565 .umount_begin
= cifs_umount_begin
,
566 .remount_fs
= cifs_remount
,
567 #ifdef CONFIG_CIFS_STATS2
568 .show_stats
= cifs_show_stats
,
573 * Get root dentry from superblock according to prefix path mount option.
574 * Return dentry with refcount + 1 on success and NULL otherwise.
576 static struct dentry
*
577 cifs_get_root(struct smb_vol
*vol
, struct super_block
*sb
)
582 struct dentry
*dparent
= NULL
, *dchild
= NULL
, *alias
;
583 struct cifs_sb_info
*cifs_sb
= CIFS_SB(sb
);
584 unsigned int i
, full_len
, len
;
585 char *full_path
= NULL
, *pstart
;
588 full_path
= cifs_build_path_to_root(vol
, cifs_sb
,
589 cifs_sb_master_tcon(cifs_sb
));
590 if (full_path
== NULL
)
593 cFYI(1, "Get root dentry for %s", full_path
);
596 sep
= CIFS_DIR_SEP(cifs_sb
);
597 dparent
= dget(sb
->s_root
);
598 full_len
= strlen(full_path
);
599 full_path
[full_len
] = sep
;
600 pstart
= full_path
+ 1;
602 for (i
= 1, len
= 0; i
<= full_len
; i
++) {
603 if (full_path
[i
] != sep
|| !len
) {
609 cFYI(1, "get dentry for %s", pstart
);
613 name
.hash
= full_name_hash(pstart
, len
);
614 dchild
= d_lookup(dparent
, &name
);
615 if (dchild
== NULL
) {
616 cFYI(1, "not exists");
617 dchild
= d_alloc(dparent
, &name
);
618 if (dchild
== NULL
) {
625 cFYI(1, "get inode");
626 if (dchild
->d_inode
== NULL
) {
627 cFYI(1, "not exists");
629 if (cifs_sb_master_tcon(CIFS_SB(sb
))->unix_ext
)
630 rc
= cifs_get_inode_info_unix(&inode
, full_path
,
633 rc
= cifs_get_inode_info(&inode
, full_path
,
634 NULL
, sb
, xid
, NULL
);
641 alias
= d_materialise_unique(dchild
, inode
);
652 cFYI(1, "parent %p, child %p", dparent
, dchild
);
657 pstart
= full_path
+ i
+ 1;
666 static struct dentry
*
667 cifs_do_mount(struct file_system_type
*fs_type
,
668 int flags
, const char *dev_name
, void *data
)
671 struct super_block
*sb
;
672 struct cifs_sb_info
*cifs_sb
;
673 struct smb_vol
*volume_info
;
674 struct cifs_mnt_data mnt_data
;
677 cFYI(1, "Devname: %s flags: %d ", dev_name
, flags
);
679 rc
= cifs_setup_volume_info(&volume_info
, (char *)data
, dev_name
);
683 cifs_sb
= kzalloc(sizeof(struct cifs_sb_info
), GFP_KERNEL
);
684 if (cifs_sb
== NULL
) {
685 root
= ERR_PTR(-ENOMEM
);
689 cifs_setup_cifs_sb(volume_info
, cifs_sb
);
691 mnt_data
.vol
= volume_info
;
692 mnt_data
.cifs_sb
= cifs_sb
;
693 mnt_data
.flags
= flags
;
695 sb
= sget(fs_type
, cifs_match_super
, set_anon_super
, &mnt_data
);
702 cFYI(1, "Use existing superblock");
707 * Copy mount params for use in submounts. Better to do
708 * the copy here and deal with the error before cleanup gets
709 * complicated post-mount.
711 cifs_sb
->mountdata
= kstrndup(data
, PAGE_SIZE
, GFP_KERNEL
);
712 if (cifs_sb
->mountdata
== NULL
) {
713 root
= ERR_PTR(-ENOMEM
);
718 /* BB should we make this contingent on mount parm? */
719 sb
->s_flags
|= MS_NODIRATIME
| MS_NOATIME
;
720 sb
->s_fs_info
= cifs_sb
;
722 rc
= cifs_read_super(sb
, volume_info
, dev_name
,
723 flags
& MS_SILENT
? 1 : 0);
729 sb
->s_flags
|= MS_ACTIVE
;
731 root
= cifs_get_root(volume_info
, sb
);
735 cFYI(1, "dentry root is: %p", root
);
739 root
= cifs_get_root(volume_info
, sb
);
741 cFYI(1, "dentry root is: %p", root
);
745 kfree(cifs_sb
->mountdata
);
746 deactivate_locked_super(sb
);
749 unload_nls(cifs_sb
->local_nls
);
753 cifs_cleanup_volume_info(&volume_info
);
757 static ssize_t
cifs_file_aio_write(struct kiocb
*iocb
, const struct iovec
*iov
,
758 unsigned long nr_segs
, loff_t pos
)
760 struct inode
*inode
= iocb
->ki_filp
->f_path
.dentry
->d_inode
;
764 written
= generic_file_aio_write(iocb
, iov
, nr_segs
, pos
);
766 if (CIFS_I(inode
)->clientCanCacheAll
)
769 rc
= filemap_fdatawrite(inode
->i_mapping
);
771 cFYI(1, "cifs_file_aio_write: %d rc on %p inode", rc
, inode
);
776 static loff_t
cifs_llseek(struct file
*file
, loff_t offset
, int origin
)
778 /* origin == SEEK_END => we must revalidate the cached file length */
779 if (origin
== SEEK_END
) {
781 struct inode
*inode
= file
->f_path
.dentry
->d_inode
;
784 * We need to be sure that all dirty pages are written and the
785 * server has the newest file length.
787 if (!CIFS_I(inode
)->clientCanCacheRead
&& inode
->i_mapping
&&
788 inode
->i_mapping
->nrpages
!= 0) {
789 rc
= filemap_fdatawait(inode
->i_mapping
);
791 mapping_set_error(inode
->i_mapping
, rc
);
796 * Some applications poll for the file length in this strange
797 * way so we must seek to end on non-oplocked files by
798 * setting the revalidate time to zero.
800 CIFS_I(inode
)->time
= 0;
802 rc
= cifs_revalidate_file_attr(file
);
806 return generic_file_llseek_unlocked(file
, offset
, origin
);
809 static int cifs_setlease(struct file
*file
, long arg
, struct file_lock
**lease
)
811 /* note that this is called by vfs setlease with lock_flocks held
812 to protect *lease from going away */
813 struct inode
*inode
= file
->f_path
.dentry
->d_inode
;
814 struct cifsFileInfo
*cfile
= file
->private_data
;
816 if (!(S_ISREG(inode
->i_mode
)))
819 /* check if file is oplocked */
820 if (((arg
== F_RDLCK
) &&
821 (CIFS_I(inode
)->clientCanCacheRead
)) ||
823 (CIFS_I(inode
)->clientCanCacheAll
)))
824 return generic_setlease(file
, arg
, lease
);
825 else if (tlink_tcon(cfile
->tlink
)->local_lease
&&
826 !CIFS_I(inode
)->clientCanCacheRead
)
827 /* If the server claims to support oplock on this
828 file, then we still need to check oplock even
829 if the local_lease mount option is set, but there
830 are servers which do not support oplock for which
831 this mount option may be useful if the user
832 knows that the file won't be changed on the server
834 return generic_setlease(file
, arg
, lease
);
839 struct file_system_type cifs_fs_type
= {
840 .owner
= THIS_MODULE
,
842 .mount
= cifs_do_mount
,
843 .kill_sb
= kill_anon_super
,
846 const struct inode_operations cifs_dir_inode_ops
= {
847 .create
= cifs_create
,
848 .lookup
= cifs_lookup
,
849 .getattr
= cifs_getattr
,
850 .unlink
= cifs_unlink
,
851 .link
= cifs_hardlink
,
854 .rename
= cifs_rename
,
855 .permission
= cifs_permission
,
856 /* revalidate:cifs_revalidate, */
857 .setattr
= cifs_setattr
,
858 .symlink
= cifs_symlink
,
860 #ifdef CONFIG_CIFS_XATTR
861 .setxattr
= cifs_setxattr
,
862 .getxattr
= cifs_getxattr
,
863 .listxattr
= cifs_listxattr
,
864 .removexattr
= cifs_removexattr
,
868 const struct inode_operations cifs_file_inode_ops
= {
869 /* revalidate:cifs_revalidate, */
870 .setattr
= cifs_setattr
,
871 .getattr
= cifs_getattr
, /* do we need this anymore? */
872 .rename
= cifs_rename
,
873 .permission
= cifs_permission
,
874 #ifdef CONFIG_CIFS_XATTR
875 .setxattr
= cifs_setxattr
,
876 .getxattr
= cifs_getxattr
,
877 .listxattr
= cifs_listxattr
,
878 .removexattr
= cifs_removexattr
,
882 const struct inode_operations cifs_symlink_inode_ops
= {
883 .readlink
= generic_readlink
,
884 .follow_link
= cifs_follow_link
,
885 .put_link
= cifs_put_link
,
886 .permission
= cifs_permission
,
887 /* BB add the following two eventually */
888 /* revalidate: cifs_revalidate,
889 setattr: cifs_notify_change, *//* BB do we need notify change */
890 #ifdef CONFIG_CIFS_XATTR
891 .setxattr
= cifs_setxattr
,
892 .getxattr
= cifs_getxattr
,
893 .listxattr
= cifs_listxattr
,
894 .removexattr
= cifs_removexattr
,
898 const struct file_operations cifs_file_ops
= {
899 .read
= do_sync_read
,
900 .write
= do_sync_write
,
901 .aio_read
= generic_file_aio_read
,
902 .aio_write
= cifs_file_aio_write
,
904 .release
= cifs_close
,
908 .mmap
= cifs_file_mmap
,
909 .splice_read
= generic_file_splice_read
,
910 .llseek
= cifs_llseek
,
911 #ifdef CONFIG_CIFS_POSIX
912 .unlocked_ioctl
= cifs_ioctl
,
913 #endif /* CONFIG_CIFS_POSIX */
914 .setlease
= cifs_setlease
,
917 const struct file_operations cifs_file_strict_ops
= {
918 .read
= do_sync_read
,
919 .write
= do_sync_write
,
920 .aio_read
= cifs_strict_readv
,
921 .aio_write
= cifs_strict_writev
,
923 .release
= cifs_close
,
925 .fsync
= cifs_strict_fsync
,
927 .mmap
= cifs_file_strict_mmap
,
928 .splice_read
= generic_file_splice_read
,
929 .llseek
= cifs_llseek
,
930 #ifdef CONFIG_CIFS_POSIX
931 .unlocked_ioctl
= cifs_ioctl
,
932 #endif /* CONFIG_CIFS_POSIX */
933 .setlease
= cifs_setlease
,
936 const struct file_operations cifs_file_direct_ops
= {
937 /* BB reevaluate whether they can be done with directio, no cache */
938 .read
= do_sync_read
,
939 .write
= do_sync_write
,
940 .aio_read
= cifs_user_readv
,
941 .aio_write
= cifs_user_writev
,
943 .release
= cifs_close
,
947 .mmap
= cifs_file_mmap
,
948 .splice_read
= generic_file_splice_read
,
949 #ifdef CONFIG_CIFS_POSIX
950 .unlocked_ioctl
= cifs_ioctl
,
951 #endif /* CONFIG_CIFS_POSIX */
952 .llseek
= cifs_llseek
,
953 .setlease
= cifs_setlease
,
956 const struct file_operations cifs_file_nobrl_ops
= {
957 .read
= do_sync_read
,
958 .write
= do_sync_write
,
959 .aio_read
= generic_file_aio_read
,
960 .aio_write
= cifs_file_aio_write
,
962 .release
= cifs_close
,
965 .mmap
= cifs_file_mmap
,
966 .splice_read
= generic_file_splice_read
,
967 .llseek
= cifs_llseek
,
968 #ifdef CONFIG_CIFS_POSIX
969 .unlocked_ioctl
= cifs_ioctl
,
970 #endif /* CONFIG_CIFS_POSIX */
971 .setlease
= cifs_setlease
,
974 const struct file_operations cifs_file_strict_nobrl_ops
= {
975 .read
= do_sync_read
,
976 .write
= do_sync_write
,
977 .aio_read
= cifs_strict_readv
,
978 .aio_write
= cifs_strict_writev
,
980 .release
= cifs_close
,
981 .fsync
= cifs_strict_fsync
,
983 .mmap
= cifs_file_strict_mmap
,
984 .splice_read
= generic_file_splice_read
,
985 .llseek
= cifs_llseek
,
986 #ifdef CONFIG_CIFS_POSIX
987 .unlocked_ioctl
= cifs_ioctl
,
988 #endif /* CONFIG_CIFS_POSIX */
989 .setlease
= cifs_setlease
,
992 const struct file_operations cifs_file_direct_nobrl_ops
= {
993 /* BB reevaluate whether they can be done with directio, no cache */
994 .read
= do_sync_read
,
995 .write
= do_sync_write
,
996 .aio_read
= cifs_user_readv
,
997 .aio_write
= cifs_user_writev
,
999 .release
= cifs_close
,
1000 .fsync
= cifs_fsync
,
1001 .flush
= cifs_flush
,
1002 .mmap
= cifs_file_mmap
,
1003 .splice_read
= generic_file_splice_read
,
1004 #ifdef CONFIG_CIFS_POSIX
1005 .unlocked_ioctl
= cifs_ioctl
,
1006 #endif /* CONFIG_CIFS_POSIX */
1007 .llseek
= cifs_llseek
,
1008 .setlease
= cifs_setlease
,
1011 const struct file_operations cifs_dir_ops
= {
1012 .readdir
= cifs_readdir
,
1013 .release
= cifs_closedir
,
1014 .read
= generic_read_dir
,
1015 .unlocked_ioctl
= cifs_ioctl
,
1016 .llseek
= generic_file_llseek
,
1020 cifs_init_once(void *inode
)
1022 struct cifsInodeInfo
*cifsi
= inode
;
1024 inode_init_once(&cifsi
->vfs_inode
);
1025 INIT_LIST_HEAD(&cifsi
->lockList
);
1029 cifs_init_inodecache(void)
1031 cifs_inode_cachep
= kmem_cache_create("cifs_inode_cache",
1032 sizeof(struct cifsInodeInfo
),
1033 0, (SLAB_RECLAIM_ACCOUNT
|
1036 if (cifs_inode_cachep
== NULL
)
1043 cifs_destroy_inodecache(void)
1045 kmem_cache_destroy(cifs_inode_cachep
);
1049 cifs_init_request_bufs(void)
1051 if (CIFSMaxBufSize
< 8192) {
1052 /* Buffer size can not be smaller than 2 * PATH_MAX since maximum
1053 Unicode path name has to fit in any SMB/CIFS path based frames */
1054 CIFSMaxBufSize
= 8192;
1055 } else if (CIFSMaxBufSize
> 1024*127) {
1056 CIFSMaxBufSize
= 1024 * 127;
1058 CIFSMaxBufSize
&= 0x1FE00; /* Round size to even 512 byte mult*/
1060 /* cERROR(1, "CIFSMaxBufSize %d 0x%x",CIFSMaxBufSize,CIFSMaxBufSize); */
1061 cifs_req_cachep
= kmem_cache_create("cifs_request",
1063 MAX_CIFS_HDR_SIZE
, 0,
1064 SLAB_HWCACHE_ALIGN
, NULL
);
1065 if (cifs_req_cachep
== NULL
)
1068 if (cifs_min_rcv
< 1)
1070 else if (cifs_min_rcv
> 64) {
1072 cERROR(1, "cifs_min_rcv set to maximum (64)");
1075 cifs_req_poolp
= mempool_create_slab_pool(cifs_min_rcv
,
1078 if (cifs_req_poolp
== NULL
) {
1079 kmem_cache_destroy(cifs_req_cachep
);
1082 /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and
1083 almost all handle based requests (but not write response, nor is it
1084 sufficient for path based requests). A smaller size would have
1085 been more efficient (compacting multiple slab items on one 4k page)
1086 for the case in which debug was on, but this larger size allows
1087 more SMBs to use small buffer alloc and is still much more
1088 efficient to alloc 1 per page off the slab compared to 17K (5page)
1089 alloc of large cifs buffers even when page debugging is on */
1090 cifs_sm_req_cachep
= kmem_cache_create("cifs_small_rq",
1091 MAX_CIFS_SMALL_BUFFER_SIZE
, 0, SLAB_HWCACHE_ALIGN
,
1093 if (cifs_sm_req_cachep
== NULL
) {
1094 mempool_destroy(cifs_req_poolp
);
1095 kmem_cache_destroy(cifs_req_cachep
);
1099 if (cifs_min_small
< 2)
1101 else if (cifs_min_small
> 256) {
1102 cifs_min_small
= 256;
1103 cFYI(1, "cifs_min_small set to maximum (256)");
1106 cifs_sm_req_poolp
= mempool_create_slab_pool(cifs_min_small
,
1107 cifs_sm_req_cachep
);
1109 if (cifs_sm_req_poolp
== NULL
) {
1110 mempool_destroy(cifs_req_poolp
);
1111 kmem_cache_destroy(cifs_req_cachep
);
1112 kmem_cache_destroy(cifs_sm_req_cachep
);
1120 cifs_destroy_request_bufs(void)
1122 mempool_destroy(cifs_req_poolp
);
1123 kmem_cache_destroy(cifs_req_cachep
);
1124 mempool_destroy(cifs_sm_req_poolp
);
1125 kmem_cache_destroy(cifs_sm_req_cachep
);
1129 cifs_init_mids(void)
1131 cifs_mid_cachep
= kmem_cache_create("cifs_mpx_ids",
1132 sizeof(struct mid_q_entry
), 0,
1133 SLAB_HWCACHE_ALIGN
, NULL
);
1134 if (cifs_mid_cachep
== NULL
)
1137 /* 3 is a reasonable minimum number of simultaneous operations */
1138 cifs_mid_poolp
= mempool_create_slab_pool(3, cifs_mid_cachep
);
1139 if (cifs_mid_poolp
== NULL
) {
1140 kmem_cache_destroy(cifs_mid_cachep
);
1148 cifs_destroy_mids(void)
1150 mempool_destroy(cifs_mid_poolp
);
1151 kmem_cache_destroy(cifs_mid_cachep
);
1159 INIT_LIST_HEAD(&cifs_tcp_ses_list
);
1160 #ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
1161 INIT_LIST_HEAD(&GlobalDnotifyReqList
);
1162 INIT_LIST_HEAD(&GlobalDnotifyRsp_Q
);
1163 #endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
1165 * Initialize Global counters
1167 atomic_set(&sesInfoAllocCount
, 0);
1168 atomic_set(&tconInfoAllocCount
, 0);
1169 atomic_set(&tcpSesAllocCount
, 0);
1170 atomic_set(&tcpSesReconnectCount
, 0);
1171 atomic_set(&tconInfoReconnectCount
, 0);
1173 atomic_set(&bufAllocCount
, 0);
1174 atomic_set(&smBufAllocCount
, 0);
1175 #ifdef CONFIG_CIFS_STATS2
1176 atomic_set(&totBufAllocCount
, 0);
1177 atomic_set(&totSmBufAllocCount
, 0);
1178 #endif /* CONFIG_CIFS_STATS2 */
1180 atomic_set(&midCount
, 0);
1181 GlobalCurrentXid
= 0;
1182 GlobalTotalActiveXid
= 0;
1183 GlobalMaxActiveXid
= 0;
1184 spin_lock_init(&cifs_tcp_ses_lock
);
1185 spin_lock_init(&cifs_file_list_lock
);
1186 spin_lock_init(&GlobalMid_Lock
);
1188 if (cifs_max_pending
< 2) {
1189 cifs_max_pending
= 2;
1190 cFYI(1, "cifs_max_pending set to min of 2");
1191 } else if (cifs_max_pending
> 256) {
1192 cifs_max_pending
= 256;
1193 cFYI(1, "cifs_max_pending set to max of 256");
1196 rc
= cifs_fscache_register();
1198 goto out_clean_proc
;
1200 rc
= cifs_init_inodecache();
1202 goto out_unreg_fscache
;
1204 rc
= cifs_init_mids();
1206 goto out_destroy_inodecache
;
1208 rc
= cifs_init_request_bufs();
1210 goto out_destroy_mids
;
1212 #ifdef CONFIG_CIFS_UPCALL
1213 rc
= register_key_type(&cifs_spnego_key_type
);
1215 goto out_destroy_request_bufs
;
1216 #endif /* CONFIG_CIFS_UPCALL */
1218 #ifdef CONFIG_CIFS_ACL
1219 rc
= init_cifs_idmap();
1221 goto out_register_key_type
;
1222 #endif /* CONFIG_CIFS_ACL */
1224 rc
= register_filesystem(&cifs_fs_type
);
1226 goto out_init_cifs_idmap
;
1230 out_init_cifs_idmap
:
1231 #ifdef CONFIG_CIFS_ACL
1233 out_register_key_type
:
1235 #ifdef CONFIG_CIFS_UPCALL
1236 unregister_key_type(&cifs_spnego_key_type
);
1237 out_destroy_request_bufs
:
1239 cifs_destroy_request_bufs();
1241 cifs_destroy_mids();
1242 out_destroy_inodecache
:
1243 cifs_destroy_inodecache();
1245 cifs_fscache_unregister();
1254 cFYI(DBG2
, "exit_cifs");
1256 cifs_fscache_unregister();
1257 #ifdef CONFIG_CIFS_DFS_UPCALL
1258 cifs_dfs_release_automount_timer();
1260 #ifdef CONFIG_CIFS_ACL
1261 cifs_destroy_idmaptrees();
1264 #ifdef CONFIG_CIFS_UPCALL
1265 unregister_key_type(&cifs_spnego_key_type
);
1267 unregister_filesystem(&cifs_fs_type
);
1268 cifs_destroy_inodecache();
1269 cifs_destroy_mids();
1270 cifs_destroy_request_bufs();
1273 MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>");
1274 MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */
1276 ("VFS to access servers complying with the SNIA CIFS Specification "
1277 "e.g. Samba and Windows");
1278 MODULE_VERSION(CIFS_VERSION
);
1279 module_init(init_cifs
)
1280 module_exit(exit_cifs
)