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
= cifs_mount(cifs_sb
, volume_info
);
123 cERROR(1, "cifs_mount failed w/return code = %d", rc
);
127 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_POSIXACL
)
128 sb
->s_flags
|= MS_POSIXACL
;
130 if (cifs_sb_master_tcon(cifs_sb
)->ses
->capabilities
& CAP_LARGE_FILES
)
131 sb
->s_maxbytes
= MAX_LFS_FILESIZE
;
133 sb
->s_maxbytes
= MAX_NON_LFS
;
135 /* BB FIXME fix time_gran to be larger for LANMAN sessions */
136 sb
->s_time_gran
= 100;
138 sb
->s_magic
= CIFS_MAGIC_NUMBER
;
139 sb
->s_op
= &cifs_super_ops
;
140 sb
->s_bdi
= &cifs_sb
->bdi
;
141 sb
->s_blocksize
= CIFS_MAX_MSGSIZE
;
142 sb
->s_blocksize_bits
= 14; /* default 2**14 = CIFS_MAX_MSGSIZE */
143 inode
= cifs_root_iget(sb
);
151 sb
->s_root
= d_alloc_root(inode
);
158 /* do that *after* d_alloc_root() - we want NULL ->d_op for root here */
159 if (cifs_sb_master_tcon(cifs_sb
)->nocase
)
160 sb
->s_d_op
= &cifs_ci_dentry_ops
;
162 sb
->s_d_op
= &cifs_dentry_ops
;
164 #ifdef CIFS_NFSD_EXPORT
165 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_SERVER_INUM
) {
166 cFYI(1, "export ops supported");
167 sb
->s_export_op
= &cifs_export_ops
;
169 #endif /* CIFS_NFSD_EXPORT */
174 cERROR(1, "cifs_read_super: get root inode failed");
178 cifs_umount(sb
, cifs_sb
);
183 cifs_put_super(struct super_block
*sb
)
186 struct cifs_sb_info
*cifs_sb
;
188 cFYI(1, "In cifs_put_super");
189 cifs_sb
= CIFS_SB(sb
);
190 if (cifs_sb
== NULL
) {
191 cFYI(1, "Empty cifs superblock info passed to unmount");
195 rc
= cifs_umount(sb
, cifs_sb
);
197 cERROR(1, "cifs_umount failed with return code %d", rc
);
200 static void cifs_kill_sb(struct super_block
*sb
)
202 struct cifs_sb_info
*cifs_sb
= CIFS_SB(sb
);
204 kfree(cifs_sb
->mountdata
);
205 unload_nls(cifs_sb
->local_nls
);
210 cifs_statfs(struct dentry
*dentry
, struct kstatfs
*buf
)
212 struct super_block
*sb
= dentry
->d_sb
;
213 struct cifs_sb_info
*cifs_sb
= CIFS_SB(sb
);
214 struct cifs_tcon
*tcon
= cifs_sb_master_tcon(cifs_sb
);
215 int rc
= -EOPNOTSUPP
;
220 buf
->f_type
= CIFS_MAGIC_NUMBER
;
223 * PATH_MAX may be too long - it would presumably be total path,
224 * but note that some servers (includinng Samba 3) have a shorter
227 * Instead could get the real value via SMB_QUERY_FS_ATTRIBUTE_INFO.
229 buf
->f_namelen
= PATH_MAX
;
230 buf
->f_files
= 0; /* undefined */
231 buf
->f_ffree
= 0; /* unlimited */
234 * We could add a second check for a QFS Unix capability bit
236 if ((tcon
->ses
->capabilities
& CAP_UNIX
) &&
237 (CIFS_POSIX_EXTENSIONS
& le64_to_cpu(tcon
->fsUnixInfo
.Capability
)))
238 rc
= CIFSSMBQFSPosixInfo(xid
, tcon
, buf
);
241 * Only need to call the old QFSInfo if failed on newer one,
244 if (rc
&& (tcon
->ses
->capabilities
& CAP_NT_SMBS
))
245 rc
= CIFSSMBQFSInfo(xid
, tcon
, buf
);
248 * Some old Windows servers also do not support level 103, retry with
249 * older level one if old server failed the previous call or we
250 * bypassed it because we detected that this was an older LANMAN sess
253 rc
= SMBOldQFSInfo(xid
, tcon
, buf
);
259 static int cifs_permission(struct inode
*inode
, int mask
, unsigned int flags
)
261 struct cifs_sb_info
*cifs_sb
;
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
);
686 unload_nls(volume_info
->local_nls
);
690 cifs_setup_cifs_sb(volume_info
, cifs_sb
);
692 mnt_data
.vol
= volume_info
;
693 mnt_data
.cifs_sb
= cifs_sb
;
694 mnt_data
.flags
= flags
;
696 sb
= sget(fs_type
, cifs_match_super
, set_anon_super
, &mnt_data
);
703 cFYI(1, "Use existing superblock");
704 unload_nls(cifs_sb
->local_nls
);
710 * Copy mount params for use in submounts. Better to do
711 * the copy here and deal with the error before cleanup gets
712 * complicated post-mount.
714 cifs_sb
->mountdata
= kstrndup(data
, PAGE_SIZE
, GFP_KERNEL
);
715 if (cifs_sb
->mountdata
== NULL
) {
716 root
= ERR_PTR(-ENOMEM
);
721 /* BB should we make this contingent on mount parm? */
722 sb
->s_flags
|= MS_NODIRATIME
| MS_NOATIME
;
723 sb
->s_fs_info
= cifs_sb
;
725 rc
= cifs_read_super(sb
, volume_info
, dev_name
,
726 flags
& MS_SILENT
? 1 : 0);
732 sb
->s_flags
|= MS_ACTIVE
;
734 root
= cifs_get_root(volume_info
, sb
);
738 cFYI(1, "dentry root is: %p", root
);
742 root
= cifs_get_root(volume_info
, sb
);
744 cFYI(1, "dentry root is: %p", root
);
748 deactivate_locked_super(sb
);
752 unload_nls(cifs_sb
->local_nls
);
756 cifs_cleanup_volume_info(&volume_info
);
760 static ssize_t
cifs_file_aio_write(struct kiocb
*iocb
, const struct iovec
*iov
,
761 unsigned long nr_segs
, loff_t pos
)
763 struct inode
*inode
= iocb
->ki_filp
->f_path
.dentry
->d_inode
;
767 written
= generic_file_aio_write(iocb
, iov
, nr_segs
, pos
);
769 if (CIFS_I(inode
)->clientCanCacheAll
)
772 rc
= filemap_fdatawrite(inode
->i_mapping
);
774 cFYI(1, "cifs_file_aio_write: %d rc on %p inode", rc
, inode
);
779 static loff_t
cifs_llseek(struct file
*file
, loff_t offset
, int origin
)
781 /* origin == SEEK_END => we must revalidate the cached file length */
782 if (origin
== SEEK_END
) {
784 struct inode
*inode
= file
->f_path
.dentry
->d_inode
;
787 * We need to be sure that all dirty pages are written and the
788 * server has the newest file length.
790 if (!CIFS_I(inode
)->clientCanCacheRead
&& inode
->i_mapping
&&
791 inode
->i_mapping
->nrpages
!= 0) {
792 rc
= filemap_fdatawait(inode
->i_mapping
);
794 mapping_set_error(inode
->i_mapping
, rc
);
799 * Some applications poll for the file length in this strange
800 * way so we must seek to end on non-oplocked files by
801 * setting the revalidate time to zero.
803 CIFS_I(inode
)->time
= 0;
805 rc
= cifs_revalidate_file_attr(file
);
809 return generic_file_llseek_unlocked(file
, offset
, origin
);
812 static int cifs_setlease(struct file
*file
, long arg
, struct file_lock
**lease
)
814 /* note that this is called by vfs setlease with lock_flocks held
815 to protect *lease from going away */
816 struct inode
*inode
= file
->f_path
.dentry
->d_inode
;
817 struct cifsFileInfo
*cfile
= file
->private_data
;
819 if (!(S_ISREG(inode
->i_mode
)))
822 /* check if file is oplocked */
823 if (((arg
== F_RDLCK
) &&
824 (CIFS_I(inode
)->clientCanCacheRead
)) ||
826 (CIFS_I(inode
)->clientCanCacheAll
)))
827 return generic_setlease(file
, arg
, lease
);
828 else if (tlink_tcon(cfile
->tlink
)->local_lease
&&
829 !CIFS_I(inode
)->clientCanCacheRead
)
830 /* If the server claims to support oplock on this
831 file, then we still need to check oplock even
832 if the local_lease mount option is set, but there
833 are servers which do not support oplock for which
834 this mount option may be useful if the user
835 knows that the file won't be changed on the server
837 return generic_setlease(file
, arg
, lease
);
842 struct file_system_type cifs_fs_type
= {
843 .owner
= THIS_MODULE
,
845 .mount
= cifs_do_mount
,
846 .kill_sb
= cifs_kill_sb
,
849 const struct inode_operations cifs_dir_inode_ops
= {
850 .create
= cifs_create
,
851 .lookup
= cifs_lookup
,
852 .getattr
= cifs_getattr
,
853 .unlink
= cifs_unlink
,
854 .link
= cifs_hardlink
,
857 .rename
= cifs_rename
,
858 .permission
= cifs_permission
,
859 /* revalidate:cifs_revalidate, */
860 .setattr
= cifs_setattr
,
861 .symlink
= cifs_symlink
,
863 #ifdef CONFIG_CIFS_XATTR
864 .setxattr
= cifs_setxattr
,
865 .getxattr
= cifs_getxattr
,
866 .listxattr
= cifs_listxattr
,
867 .removexattr
= cifs_removexattr
,
871 const struct inode_operations cifs_file_inode_ops
= {
872 /* revalidate:cifs_revalidate, */
873 .setattr
= cifs_setattr
,
874 .getattr
= cifs_getattr
, /* do we need this anymore? */
875 .rename
= cifs_rename
,
876 .permission
= cifs_permission
,
877 #ifdef CONFIG_CIFS_XATTR
878 .setxattr
= cifs_setxattr
,
879 .getxattr
= cifs_getxattr
,
880 .listxattr
= cifs_listxattr
,
881 .removexattr
= cifs_removexattr
,
885 const struct inode_operations cifs_symlink_inode_ops
= {
886 .readlink
= generic_readlink
,
887 .follow_link
= cifs_follow_link
,
888 .put_link
= cifs_put_link
,
889 .permission
= cifs_permission
,
890 /* BB add the following two eventually */
891 /* revalidate: cifs_revalidate,
892 setattr: cifs_notify_change, *//* BB do we need notify change */
893 #ifdef CONFIG_CIFS_XATTR
894 .setxattr
= cifs_setxattr
,
895 .getxattr
= cifs_getxattr
,
896 .listxattr
= cifs_listxattr
,
897 .removexattr
= cifs_removexattr
,
901 const struct file_operations cifs_file_ops
= {
902 .read
= do_sync_read
,
903 .write
= do_sync_write
,
904 .aio_read
= generic_file_aio_read
,
905 .aio_write
= cifs_file_aio_write
,
907 .release
= cifs_close
,
911 .mmap
= cifs_file_mmap
,
912 .splice_read
= generic_file_splice_read
,
913 .llseek
= cifs_llseek
,
914 #ifdef CONFIG_CIFS_POSIX
915 .unlocked_ioctl
= cifs_ioctl
,
916 #endif /* CONFIG_CIFS_POSIX */
917 .setlease
= cifs_setlease
,
920 const struct file_operations cifs_file_strict_ops
= {
921 .read
= do_sync_read
,
922 .write
= do_sync_write
,
923 .aio_read
= cifs_strict_readv
,
924 .aio_write
= cifs_strict_writev
,
926 .release
= cifs_close
,
928 .fsync
= cifs_strict_fsync
,
930 .mmap
= cifs_file_strict_mmap
,
931 .splice_read
= generic_file_splice_read
,
932 .llseek
= cifs_llseek
,
933 #ifdef CONFIG_CIFS_POSIX
934 .unlocked_ioctl
= cifs_ioctl
,
935 #endif /* CONFIG_CIFS_POSIX */
936 .setlease
= cifs_setlease
,
939 const struct file_operations cifs_file_direct_ops
= {
940 /* BB reevaluate whether they can be done with directio, no cache */
941 .read
= do_sync_read
,
942 .write
= do_sync_write
,
943 .aio_read
= cifs_user_readv
,
944 .aio_write
= cifs_user_writev
,
946 .release
= cifs_close
,
950 .mmap
= cifs_file_mmap
,
951 .splice_read
= generic_file_splice_read
,
952 #ifdef CONFIG_CIFS_POSIX
953 .unlocked_ioctl
= cifs_ioctl
,
954 #endif /* CONFIG_CIFS_POSIX */
955 .llseek
= cifs_llseek
,
956 .setlease
= cifs_setlease
,
959 const struct file_operations cifs_file_nobrl_ops
= {
960 .read
= do_sync_read
,
961 .write
= do_sync_write
,
962 .aio_read
= generic_file_aio_read
,
963 .aio_write
= cifs_file_aio_write
,
965 .release
= cifs_close
,
968 .mmap
= cifs_file_mmap
,
969 .splice_read
= generic_file_splice_read
,
970 .llseek
= cifs_llseek
,
971 #ifdef CONFIG_CIFS_POSIX
972 .unlocked_ioctl
= cifs_ioctl
,
973 #endif /* CONFIG_CIFS_POSIX */
974 .setlease
= cifs_setlease
,
977 const struct file_operations cifs_file_strict_nobrl_ops
= {
978 .read
= do_sync_read
,
979 .write
= do_sync_write
,
980 .aio_read
= cifs_strict_readv
,
981 .aio_write
= cifs_strict_writev
,
983 .release
= cifs_close
,
984 .fsync
= cifs_strict_fsync
,
986 .mmap
= cifs_file_strict_mmap
,
987 .splice_read
= generic_file_splice_read
,
988 .llseek
= cifs_llseek
,
989 #ifdef CONFIG_CIFS_POSIX
990 .unlocked_ioctl
= cifs_ioctl
,
991 #endif /* CONFIG_CIFS_POSIX */
992 .setlease
= cifs_setlease
,
995 const struct file_operations cifs_file_direct_nobrl_ops
= {
996 /* BB reevaluate whether they can be done with directio, no cache */
997 .read
= do_sync_read
,
998 .write
= do_sync_write
,
999 .aio_read
= cifs_user_readv
,
1000 .aio_write
= cifs_user_writev
,
1002 .release
= cifs_close
,
1003 .fsync
= cifs_fsync
,
1004 .flush
= cifs_flush
,
1005 .mmap
= cifs_file_mmap
,
1006 .splice_read
= generic_file_splice_read
,
1007 #ifdef CONFIG_CIFS_POSIX
1008 .unlocked_ioctl
= cifs_ioctl
,
1009 #endif /* CONFIG_CIFS_POSIX */
1010 .llseek
= cifs_llseek
,
1011 .setlease
= cifs_setlease
,
1014 const struct file_operations cifs_dir_ops
= {
1015 .readdir
= cifs_readdir
,
1016 .release
= cifs_closedir
,
1017 .read
= generic_read_dir
,
1018 .unlocked_ioctl
= cifs_ioctl
,
1019 .llseek
= generic_file_llseek
,
1023 cifs_init_once(void *inode
)
1025 struct cifsInodeInfo
*cifsi
= inode
;
1027 inode_init_once(&cifsi
->vfs_inode
);
1028 INIT_LIST_HEAD(&cifsi
->lockList
);
1032 cifs_init_inodecache(void)
1034 cifs_inode_cachep
= kmem_cache_create("cifs_inode_cache",
1035 sizeof(struct cifsInodeInfo
),
1036 0, (SLAB_RECLAIM_ACCOUNT
|
1039 if (cifs_inode_cachep
== NULL
)
1046 cifs_destroy_inodecache(void)
1048 kmem_cache_destroy(cifs_inode_cachep
);
1052 cifs_init_request_bufs(void)
1054 if (CIFSMaxBufSize
< 8192) {
1055 /* Buffer size can not be smaller than 2 * PATH_MAX since maximum
1056 Unicode path name has to fit in any SMB/CIFS path based frames */
1057 CIFSMaxBufSize
= 8192;
1058 } else if (CIFSMaxBufSize
> 1024*127) {
1059 CIFSMaxBufSize
= 1024 * 127;
1061 CIFSMaxBufSize
&= 0x1FE00; /* Round size to even 512 byte mult*/
1063 /* cERROR(1, "CIFSMaxBufSize %d 0x%x",CIFSMaxBufSize,CIFSMaxBufSize); */
1064 cifs_req_cachep
= kmem_cache_create("cifs_request",
1066 MAX_CIFS_HDR_SIZE
, 0,
1067 SLAB_HWCACHE_ALIGN
, NULL
);
1068 if (cifs_req_cachep
== NULL
)
1071 if (cifs_min_rcv
< 1)
1073 else if (cifs_min_rcv
> 64) {
1075 cERROR(1, "cifs_min_rcv set to maximum (64)");
1078 cifs_req_poolp
= mempool_create_slab_pool(cifs_min_rcv
,
1081 if (cifs_req_poolp
== NULL
) {
1082 kmem_cache_destroy(cifs_req_cachep
);
1085 /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and
1086 almost all handle based requests (but not write response, nor is it
1087 sufficient for path based requests). A smaller size would have
1088 been more efficient (compacting multiple slab items on one 4k page)
1089 for the case in which debug was on, but this larger size allows
1090 more SMBs to use small buffer alloc and is still much more
1091 efficient to alloc 1 per page off the slab compared to 17K (5page)
1092 alloc of large cifs buffers even when page debugging is on */
1093 cifs_sm_req_cachep
= kmem_cache_create("cifs_small_rq",
1094 MAX_CIFS_SMALL_BUFFER_SIZE
, 0, SLAB_HWCACHE_ALIGN
,
1096 if (cifs_sm_req_cachep
== NULL
) {
1097 mempool_destroy(cifs_req_poolp
);
1098 kmem_cache_destroy(cifs_req_cachep
);
1102 if (cifs_min_small
< 2)
1104 else if (cifs_min_small
> 256) {
1105 cifs_min_small
= 256;
1106 cFYI(1, "cifs_min_small set to maximum (256)");
1109 cifs_sm_req_poolp
= mempool_create_slab_pool(cifs_min_small
,
1110 cifs_sm_req_cachep
);
1112 if (cifs_sm_req_poolp
== NULL
) {
1113 mempool_destroy(cifs_req_poolp
);
1114 kmem_cache_destroy(cifs_req_cachep
);
1115 kmem_cache_destroy(cifs_sm_req_cachep
);
1123 cifs_destroy_request_bufs(void)
1125 mempool_destroy(cifs_req_poolp
);
1126 kmem_cache_destroy(cifs_req_cachep
);
1127 mempool_destroy(cifs_sm_req_poolp
);
1128 kmem_cache_destroy(cifs_sm_req_cachep
);
1132 cifs_init_mids(void)
1134 cifs_mid_cachep
= kmem_cache_create("cifs_mpx_ids",
1135 sizeof(struct mid_q_entry
), 0,
1136 SLAB_HWCACHE_ALIGN
, NULL
);
1137 if (cifs_mid_cachep
== NULL
)
1140 /* 3 is a reasonable minimum number of simultaneous operations */
1141 cifs_mid_poolp
= mempool_create_slab_pool(3, cifs_mid_cachep
);
1142 if (cifs_mid_poolp
== NULL
) {
1143 kmem_cache_destroy(cifs_mid_cachep
);
1151 cifs_destroy_mids(void)
1153 mempool_destroy(cifs_mid_poolp
);
1154 kmem_cache_destroy(cifs_mid_cachep
);
1162 INIT_LIST_HEAD(&cifs_tcp_ses_list
);
1163 #ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
1164 INIT_LIST_HEAD(&GlobalDnotifyReqList
);
1165 INIT_LIST_HEAD(&GlobalDnotifyRsp_Q
);
1166 #endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
1168 * Initialize Global counters
1170 atomic_set(&sesInfoAllocCount
, 0);
1171 atomic_set(&tconInfoAllocCount
, 0);
1172 atomic_set(&tcpSesAllocCount
, 0);
1173 atomic_set(&tcpSesReconnectCount
, 0);
1174 atomic_set(&tconInfoReconnectCount
, 0);
1176 atomic_set(&bufAllocCount
, 0);
1177 atomic_set(&smBufAllocCount
, 0);
1178 #ifdef CONFIG_CIFS_STATS2
1179 atomic_set(&totBufAllocCount
, 0);
1180 atomic_set(&totSmBufAllocCount
, 0);
1181 #endif /* CONFIG_CIFS_STATS2 */
1183 atomic_set(&midCount
, 0);
1184 GlobalCurrentXid
= 0;
1185 GlobalTotalActiveXid
= 0;
1186 GlobalMaxActiveXid
= 0;
1187 spin_lock_init(&cifs_tcp_ses_lock
);
1188 spin_lock_init(&cifs_file_list_lock
);
1189 spin_lock_init(&GlobalMid_Lock
);
1191 if (cifs_max_pending
< 2) {
1192 cifs_max_pending
= 2;
1193 cFYI(1, "cifs_max_pending set to min of 2");
1194 } else if (cifs_max_pending
> 256) {
1195 cifs_max_pending
= 256;
1196 cFYI(1, "cifs_max_pending set to max of 256");
1199 rc
= cifs_fscache_register();
1201 goto out_clean_proc
;
1203 rc
= cifs_init_inodecache();
1205 goto out_unreg_fscache
;
1207 rc
= cifs_init_mids();
1209 goto out_destroy_inodecache
;
1211 rc
= cifs_init_request_bufs();
1213 goto out_destroy_mids
;
1215 #ifdef CONFIG_CIFS_UPCALL
1216 rc
= register_key_type(&cifs_spnego_key_type
);
1218 goto out_destroy_request_bufs
;
1219 #endif /* CONFIG_CIFS_UPCALL */
1221 #ifdef CONFIG_CIFS_ACL
1222 rc
= init_cifs_idmap();
1224 goto out_register_key_type
;
1225 #endif /* CONFIG_CIFS_ACL */
1227 rc
= register_filesystem(&cifs_fs_type
);
1229 goto out_init_cifs_idmap
;
1233 out_init_cifs_idmap
:
1234 #ifdef CONFIG_CIFS_ACL
1236 out_register_key_type
:
1238 #ifdef CONFIG_CIFS_UPCALL
1239 unregister_key_type(&cifs_spnego_key_type
);
1240 out_destroy_request_bufs
:
1242 cifs_destroy_request_bufs();
1244 cifs_destroy_mids();
1245 out_destroy_inodecache
:
1246 cifs_destroy_inodecache();
1248 cifs_fscache_unregister();
1257 cFYI(DBG2
, "exit_cifs");
1259 cifs_fscache_unregister();
1260 #ifdef CONFIG_CIFS_DFS_UPCALL
1261 cifs_dfs_release_automount_timer();
1263 #ifdef CONFIG_CIFS_ACL
1264 cifs_destroy_idmaptrees();
1267 #ifdef CONFIG_CIFS_UPCALL
1268 unregister_key_type(&cifs_spnego_key_type
);
1270 unregister_filesystem(&cifs_fs_type
);
1271 cifs_destroy_inodecache();
1272 cifs_destroy_mids();
1273 cifs_destroy_request_bufs();
1276 MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>");
1277 MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */
1279 ("VFS to access servers complying with the SNIA CIFS Specification "
1280 "e.g. Samba and Windows");
1281 MODULE_VERSION(CIFS_VERSION
);
1282 module_init(init_cifs
)
1283 module_exit(exit_cifs
)