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
, void *data
,
108 const char *devname
, int silent
)
111 struct cifs_sb_info
*cifs_sb
;
114 /* BB should we make this contingent on mount parm? */
115 sb
->s_flags
|= MS_NODIRATIME
| MS_NOATIME
;
116 sb
->s_fs_info
= kzalloc(sizeof(struct cifs_sb_info
), GFP_KERNEL
);
117 cifs_sb
= CIFS_SB(sb
);
121 spin_lock_init(&cifs_sb
->tlink_tree_lock
);
122 cifs_sb
->tlink_tree
= RB_ROOT
;
124 rc
= bdi_setup_and_register(&cifs_sb
->bdi
, "cifs", BDI_CAP_MAP_COPY
);
129 cifs_sb
->bdi
.ra_pages
= default_backing_dev_info
.ra_pages
;
131 #ifdef CONFIG_CIFS_DFS_UPCALL
132 /* copy mount params to sb for use in submounts */
133 /* BB: should we move this after the mount so we
134 * do not have to do the copy on failed mounts?
135 * BB: May be it is better to do simple copy before
136 * complex operation (mount), and in case of fail
137 * just exit instead of doing mount and attempting
138 * undo it if this copy fails?*/
140 int len
= strlen(data
);
141 cifs_sb
->mountdata
= kzalloc(len
+ 1, GFP_KERNEL
);
142 if (cifs_sb
->mountdata
== NULL
) {
143 bdi_destroy(&cifs_sb
->bdi
);
144 kfree(sb
->s_fs_info
);
145 sb
->s_fs_info
= NULL
;
148 strncpy(cifs_sb
->mountdata
, data
, len
+ 1);
149 cifs_sb
->mountdata
[len
] = '\0';
153 rc
= cifs_mount(sb
, cifs_sb
, data
, devname
);
157 cERROR(1, "cifs_mount failed w/return code = %d", rc
);
158 goto out_mount_failed
;
161 sb
->s_magic
= CIFS_MAGIC_NUMBER
;
162 sb
->s_op
= &cifs_super_ops
;
163 sb
->s_bdi
= &cifs_sb
->bdi
;
164 sb
->s_blocksize
= CIFS_MAX_MSGSIZE
;
165 sb
->s_blocksize_bits
= 14; /* default 2**14 = CIFS_MAX_MSGSIZE */
166 inode
= cifs_root_iget(sb
);
174 sb
->s_root
= d_alloc_root(inode
);
181 /* do that *after* d_alloc_root() - we want NULL ->d_op for root here */
182 if (cifs_sb_master_tcon(cifs_sb
)->nocase
)
183 sb
->s_d_op
= &cifs_ci_dentry_ops
;
185 sb
->s_d_op
= &cifs_dentry_ops
;
187 #ifdef CIFS_NFSD_EXPORT
188 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_SERVER_INUM
) {
189 cFYI(1, "export ops supported");
190 sb
->s_export_op
= &cifs_export_ops
;
192 #endif /* CIFS_NFSD_EXPORT */
197 cERROR(1, "cifs_read_super: get root inode failed");
201 cifs_umount(sb
, cifs_sb
);
205 #ifdef CONFIG_CIFS_DFS_UPCALL
206 if (cifs_sb
->mountdata
) {
207 kfree(cifs_sb
->mountdata
);
208 cifs_sb
->mountdata
= NULL
;
211 unload_nls(cifs_sb
->local_nls
);
212 bdi_destroy(&cifs_sb
->bdi
);
219 cifs_put_super(struct super_block
*sb
)
222 struct cifs_sb_info
*cifs_sb
;
224 cFYI(1, "In cifs_put_super");
225 cifs_sb
= CIFS_SB(sb
);
226 if (cifs_sb
== NULL
) {
227 cFYI(1, "Empty cifs superblock info passed to unmount");
231 rc
= cifs_umount(sb
, cifs_sb
);
233 cERROR(1, "cifs_umount failed with return code %d", rc
);
234 #ifdef CONFIG_CIFS_DFS_UPCALL
235 if (cifs_sb
->mountdata
) {
236 kfree(cifs_sb
->mountdata
);
237 cifs_sb
->mountdata
= NULL
;
241 unload_nls(cifs_sb
->local_nls
);
242 bdi_destroy(&cifs_sb
->bdi
);
247 cifs_statfs(struct dentry
*dentry
, struct kstatfs
*buf
)
249 struct super_block
*sb
= dentry
->d_sb
;
250 struct cifs_sb_info
*cifs_sb
= CIFS_SB(sb
);
251 struct cifsTconInfo
*tcon
= cifs_sb_master_tcon(cifs_sb
);
252 int rc
= -EOPNOTSUPP
;
257 buf
->f_type
= CIFS_MAGIC_NUMBER
;
260 * PATH_MAX may be too long - it would presumably be total path,
261 * but note that some servers (includinng Samba 3) have a shorter
264 * Instead could get the real value via SMB_QUERY_FS_ATTRIBUTE_INFO.
266 buf
->f_namelen
= PATH_MAX
;
267 buf
->f_files
= 0; /* undefined */
268 buf
->f_ffree
= 0; /* unlimited */
271 * We could add a second check for a QFS Unix capability bit
273 if ((tcon
->ses
->capabilities
& CAP_UNIX
) &&
274 (CIFS_POSIX_EXTENSIONS
& le64_to_cpu(tcon
->fsUnixInfo
.Capability
)))
275 rc
= CIFSSMBQFSPosixInfo(xid
, tcon
, buf
);
278 * Only need to call the old QFSInfo if failed on newer one,
281 if (rc
&& (tcon
->ses
->capabilities
& CAP_NT_SMBS
))
282 rc
= CIFSSMBQFSInfo(xid
, tcon
, buf
);
285 * Some old Windows servers also do not support level 103, retry with
286 * older level one if old server failed the previous call or we
287 * bypassed it because we detected that this was an older LANMAN sess
290 rc
= SMBOldQFSInfo(xid
, tcon
, buf
);
296 static int cifs_permission(struct inode
*inode
, int mask
, unsigned int flags
)
298 struct cifs_sb_info
*cifs_sb
;
300 if (flags
& IPERM_FLAG_RCU
)
303 cifs_sb
= CIFS_SB(inode
->i_sb
);
305 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_NO_PERM
) {
306 if ((mask
& MAY_EXEC
) && !execute_ok(inode
))
310 } else /* file mode might have been restricted at mount time
311 on the client (above and beyond ACL on servers) for
312 servers which do not support setting and viewing mode bits,
313 so allowing client to check permissions is useful */
314 return generic_permission(inode
, mask
, flags
, NULL
);
317 static struct kmem_cache
*cifs_inode_cachep
;
318 static struct kmem_cache
*cifs_req_cachep
;
319 static struct kmem_cache
*cifs_mid_cachep
;
320 static struct kmem_cache
*cifs_sm_req_cachep
;
321 mempool_t
*cifs_sm_req_poolp
;
322 mempool_t
*cifs_req_poolp
;
323 mempool_t
*cifs_mid_poolp
;
325 static struct inode
*
326 cifs_alloc_inode(struct super_block
*sb
)
328 struct cifsInodeInfo
*cifs_inode
;
329 cifs_inode
= kmem_cache_alloc(cifs_inode_cachep
, GFP_KERNEL
);
332 cifs_inode
->cifsAttrs
= 0x20; /* default */
333 cifs_inode
->time
= 0;
334 /* Until the file is open and we have gotten oplock
335 info back from the server, can not assume caching of
336 file data or metadata */
337 cifs_set_oplock_level(cifs_inode
, 0);
338 cifs_inode
->delete_pending
= false;
339 cifs_inode
->invalid_mapping
= false;
340 cifs_inode
->vfs_inode
.i_blkbits
= 14; /* 2**14 = CIFS_MAX_MSGSIZE */
341 cifs_inode
->server_eof
= 0;
342 cifs_inode
->uniqueid
= 0;
343 cifs_inode
->createtime
= 0;
345 /* Can not set i_flags here - they get immediately overwritten
346 to zero by the VFS */
347 /* cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME;*/
348 INIT_LIST_HEAD(&cifs_inode
->openFileList
);
349 return &cifs_inode
->vfs_inode
;
352 static void cifs_i_callback(struct rcu_head
*head
)
354 struct inode
*inode
= container_of(head
, struct inode
, i_rcu
);
355 INIT_LIST_HEAD(&inode
->i_dentry
);
356 kmem_cache_free(cifs_inode_cachep
, CIFS_I(inode
));
360 cifs_destroy_inode(struct inode
*inode
)
362 call_rcu(&inode
->i_rcu
, cifs_i_callback
);
366 cifs_evict_inode(struct inode
*inode
)
368 truncate_inode_pages(&inode
->i_data
, 0);
369 end_writeback(inode
);
370 cifs_fscache_release_inode_cookie(inode
);
374 cifs_show_address(struct seq_file
*s
, struct TCP_Server_Info
*server
)
376 struct sockaddr_in
*sa
= (struct sockaddr_in
*) &server
->dstaddr
;
377 struct sockaddr_in6
*sa6
= (struct sockaddr_in6
*) &server
->dstaddr
;
379 seq_printf(s
, ",addr=");
381 switch (server
->dstaddr
.ss_family
) {
383 seq_printf(s
, "%pI4", &sa
->sin_addr
.s_addr
);
386 seq_printf(s
, "%pI6", &sa6
->sin6_addr
.s6_addr
);
387 if (sa6
->sin6_scope_id
)
388 seq_printf(s
, "%%%u", sa6
->sin6_scope_id
);
391 seq_printf(s
, "(unknown)");
396 * cifs_show_options() is for displaying mount options in /proc/mounts.
397 * Not all settable options are displayed but most of the important
401 cifs_show_options(struct seq_file
*s
, struct vfsmount
*m
)
403 struct cifs_sb_info
*cifs_sb
= CIFS_SB(m
->mnt_sb
);
404 struct cifsTconInfo
*tcon
= cifs_sb_master_tcon(cifs_sb
);
405 struct sockaddr
*srcaddr
;
406 srcaddr
= (struct sockaddr
*)&tcon
->ses
->server
->srcaddr
;
408 seq_printf(s
, ",unc=%s", tcon
->treeName
);
410 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_MULTIUSER
)
411 seq_printf(s
, ",multiuser");
412 else if (tcon
->ses
->user_name
)
413 seq_printf(s
, ",username=%s", tcon
->ses
->user_name
);
415 if (tcon
->ses
->domainName
)
416 seq_printf(s
, ",domain=%s", tcon
->ses
->domainName
);
418 if (srcaddr
->sa_family
!= AF_UNSPEC
) {
419 struct sockaddr_in
*saddr4
;
420 struct sockaddr_in6
*saddr6
;
421 saddr4
= (struct sockaddr_in
*)srcaddr
;
422 saddr6
= (struct sockaddr_in6
*)srcaddr
;
423 if (srcaddr
->sa_family
== AF_INET6
)
424 seq_printf(s
, ",srcaddr=%pI6c",
426 else if (srcaddr
->sa_family
== AF_INET
)
427 seq_printf(s
, ",srcaddr=%pI4",
428 &saddr4
->sin_addr
.s_addr
);
430 seq_printf(s
, ",srcaddr=BAD-AF:%i",
431 (int)(srcaddr
->sa_family
));
434 seq_printf(s
, ",uid=%d", cifs_sb
->mnt_uid
);
435 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_OVERR_UID
)
436 seq_printf(s
, ",forceuid");
438 seq_printf(s
, ",noforceuid");
440 seq_printf(s
, ",gid=%d", cifs_sb
->mnt_gid
);
441 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_OVERR_GID
)
442 seq_printf(s
, ",forcegid");
444 seq_printf(s
, ",noforcegid");
446 cifs_show_address(s
, tcon
->ses
->server
);
449 seq_printf(s
, ",file_mode=0%o,dir_mode=0%o",
450 cifs_sb
->mnt_file_mode
,
451 cifs_sb
->mnt_dir_mode
);
453 seq_printf(s
, ",seal");
455 seq_printf(s
, ",nocase");
457 seq_printf(s
, ",hard");
458 if (cifs_sb
->prepath
)
459 seq_printf(s
, ",prepath=%s", cifs_sb
->prepath
);
460 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_POSIX_PATHS
)
461 seq_printf(s
, ",posixpaths");
462 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_SET_UID
)
463 seq_printf(s
, ",setuids");
464 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_SERVER_INUM
)
465 seq_printf(s
, ",serverino");
466 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_DIRECT_IO
)
467 seq_printf(s
, ",directio");
468 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_NO_XATTR
)
469 seq_printf(s
, ",nouser_xattr");
470 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_MAP_SPECIAL_CHR
)
471 seq_printf(s
, ",mapchars");
472 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_UNX_EMUL
)
473 seq_printf(s
, ",sfu");
474 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_NO_BRL
)
475 seq_printf(s
, ",nobrl");
476 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_CIFS_ACL
)
477 seq_printf(s
, ",cifsacl");
478 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_DYNPERM
)
479 seq_printf(s
, ",dynperm");
480 if (m
->mnt_sb
->s_flags
& MS_POSIXACL
)
481 seq_printf(s
, ",acl");
482 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_MF_SYMLINKS
)
483 seq_printf(s
, ",mfsymlinks");
484 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_FSCACHE
)
485 seq_printf(s
, ",fsc");
487 seq_printf(s
, ",rsize=%d", cifs_sb
->rsize
);
488 seq_printf(s
, ",wsize=%d", cifs_sb
->wsize
);
489 /* convert actimeo and display it in seconds */
490 seq_printf(s
, ",actimeo=%lu", cifs_sb
->actimeo
/ HZ
);
495 static void cifs_umount_begin(struct super_block
*sb
)
497 struct cifs_sb_info
*cifs_sb
= CIFS_SB(sb
);
498 struct cifsTconInfo
*tcon
;
503 tcon
= cifs_sb_master_tcon(cifs_sb
);
505 spin_lock(&cifs_tcp_ses_lock
);
506 if ((tcon
->tc_count
> 1) || (tcon
->tidStatus
== CifsExiting
)) {
507 /* we have other mounts to same share or we have
508 already tried to force umount this and woken up
509 all waiting network requests, nothing to do */
510 spin_unlock(&cifs_tcp_ses_lock
);
512 } else if (tcon
->tc_count
== 1)
513 tcon
->tidStatus
= CifsExiting
;
514 spin_unlock(&cifs_tcp_ses_lock
);
516 /* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */
517 /* cancel_notify_requests(tcon); */
518 if (tcon
->ses
&& tcon
->ses
->server
) {
519 cFYI(1, "wake up tasks now - umount begin not complete");
520 wake_up_all(&tcon
->ses
->server
->request_q
);
521 wake_up_all(&tcon
->ses
->server
->response_q
);
522 msleep(1); /* yield */
523 /* we have to kick the requests once more */
524 wake_up_all(&tcon
->ses
->server
->response_q
);
531 #ifdef CONFIG_CIFS_STATS2
532 static int cifs_show_stats(struct seq_file
*s
, struct vfsmount
*mnt
)
539 static int cifs_remount(struct super_block
*sb
, int *flags
, char *data
)
541 *flags
|= MS_NODIRATIME
;
545 static int cifs_drop_inode(struct inode
*inode
)
547 struct cifs_sb_info
*cifs_sb
= CIFS_SB(inode
->i_sb
);
549 /* no serverino => unconditional eviction */
550 return !(cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_SERVER_INUM
) ||
551 generic_drop_inode(inode
);
554 static const struct super_operations cifs_super_ops
= {
555 .put_super
= cifs_put_super
,
556 .statfs
= cifs_statfs
,
557 .alloc_inode
= cifs_alloc_inode
,
558 .destroy_inode
= cifs_destroy_inode
,
559 .drop_inode
= cifs_drop_inode
,
560 .evict_inode
= cifs_evict_inode
,
561 /* .delete_inode = cifs_delete_inode, */ /* Do not need above
562 function unless later we add lazy close of inodes or unless the
563 kernel forgets to call us with the same number of releases (closes)
565 .show_options
= cifs_show_options
,
566 .umount_begin
= cifs_umount_begin
,
567 .remount_fs
= cifs_remount
,
568 #ifdef CONFIG_CIFS_STATS2
569 .show_stats
= cifs_show_stats
,
573 static struct dentry
*
574 cifs_do_mount(struct file_system_type
*fs_type
,
575 int flags
, const char *dev_name
, void *data
)
578 struct super_block
*sb
;
580 sb
= sget(fs_type
, NULL
, set_anon_super
, NULL
);
582 cFYI(1, "Devname: %s flags: %d ", dev_name
, flags
);
589 rc
= cifs_read_super(sb
, data
, dev_name
, flags
& MS_SILENT
? 1 : 0);
591 deactivate_locked_super(sb
);
594 sb
->s_flags
|= MS_ACTIVE
;
595 return dget(sb
->s_root
);
598 static ssize_t
cifs_file_aio_write(struct kiocb
*iocb
, const struct iovec
*iov
,
599 unsigned long nr_segs
, loff_t pos
)
601 struct inode
*inode
= iocb
->ki_filp
->f_path
.dentry
->d_inode
;
605 written
= generic_file_aio_write(iocb
, iov
, nr_segs
, pos
);
607 if (CIFS_I(inode
)->clientCanCacheAll
)
610 rc
= filemap_fdatawrite(inode
->i_mapping
);
612 cFYI(1, "cifs_file_aio_write: %d rc on %p inode", rc
, inode
);
617 static loff_t
cifs_llseek(struct file
*file
, loff_t offset
, int origin
)
619 /* origin == SEEK_END => we must revalidate the cached file length */
620 if (origin
== SEEK_END
) {
622 struct inode
*inode
= file
->f_path
.dentry
->d_inode
;
625 * We need to be sure that all dirty pages are written and the
626 * server has the newest file length.
628 if (!CIFS_I(inode
)->clientCanCacheRead
&& inode
->i_mapping
&&
629 inode
->i_mapping
->nrpages
!= 0) {
630 rc
= filemap_fdatawait(inode
->i_mapping
);
631 mapping_set_error(inode
->i_mapping
, rc
);
635 * Some applications poll for the file length in this strange
636 * way so we must seek to end on non-oplocked files by
637 * setting the revalidate time to zero.
639 CIFS_I(inode
)->time
= 0;
641 rc
= cifs_revalidate_file_attr(file
);
645 return generic_file_llseek_unlocked(file
, offset
, origin
);
648 static int cifs_setlease(struct file
*file
, long arg
, struct file_lock
**lease
)
650 /* note that this is called by vfs setlease with lock_flocks held
651 to protect *lease from going away */
652 struct inode
*inode
= file
->f_path
.dentry
->d_inode
;
653 struct cifsFileInfo
*cfile
= file
->private_data
;
655 if (!(S_ISREG(inode
->i_mode
)))
658 /* check if file is oplocked */
659 if (((arg
== F_RDLCK
) &&
660 (CIFS_I(inode
)->clientCanCacheRead
)) ||
662 (CIFS_I(inode
)->clientCanCacheAll
)))
663 return generic_setlease(file
, arg
, lease
);
664 else if (tlink_tcon(cfile
->tlink
)->local_lease
&&
665 !CIFS_I(inode
)->clientCanCacheRead
)
666 /* If the server claims to support oplock on this
667 file, then we still need to check oplock even
668 if the local_lease mount option is set, but there
669 are servers which do not support oplock for which
670 this mount option may be useful if the user
671 knows that the file won't be changed on the server
673 return generic_setlease(file
, arg
, lease
);
678 struct file_system_type cifs_fs_type
= {
679 .owner
= THIS_MODULE
,
681 .mount
= cifs_do_mount
,
682 .kill_sb
= kill_anon_super
,
685 const struct inode_operations cifs_dir_inode_ops
= {
686 .create
= cifs_create
,
687 .lookup
= cifs_lookup
,
688 .getattr
= cifs_getattr
,
689 .unlink
= cifs_unlink
,
690 .link
= cifs_hardlink
,
693 .rename
= cifs_rename
,
694 .permission
= cifs_permission
,
695 /* revalidate:cifs_revalidate, */
696 .setattr
= cifs_setattr
,
697 .symlink
= cifs_symlink
,
699 #ifdef CONFIG_CIFS_XATTR
700 .setxattr
= cifs_setxattr
,
701 .getxattr
= cifs_getxattr
,
702 .listxattr
= cifs_listxattr
,
703 .removexattr
= cifs_removexattr
,
707 const struct inode_operations cifs_file_inode_ops
= {
708 /* revalidate:cifs_revalidate, */
709 .setattr
= cifs_setattr
,
710 .getattr
= cifs_getattr
, /* do we need this anymore? */
711 .rename
= cifs_rename
,
712 .permission
= cifs_permission
,
713 #ifdef CONFIG_CIFS_XATTR
714 .setxattr
= cifs_setxattr
,
715 .getxattr
= cifs_getxattr
,
716 .listxattr
= cifs_listxattr
,
717 .removexattr
= cifs_removexattr
,
721 const struct inode_operations cifs_symlink_inode_ops
= {
722 .readlink
= generic_readlink
,
723 .follow_link
= cifs_follow_link
,
724 .put_link
= cifs_put_link
,
725 .permission
= cifs_permission
,
726 /* BB add the following two eventually */
727 /* revalidate: cifs_revalidate,
728 setattr: cifs_notify_change, *//* BB do we need notify change */
729 #ifdef CONFIG_CIFS_XATTR
730 .setxattr
= cifs_setxattr
,
731 .getxattr
= cifs_getxattr
,
732 .listxattr
= cifs_listxattr
,
733 .removexattr
= cifs_removexattr
,
737 const struct file_operations cifs_file_ops
= {
738 .read
= do_sync_read
,
739 .write
= do_sync_write
,
740 .aio_read
= generic_file_aio_read
,
741 .aio_write
= cifs_file_aio_write
,
743 .release
= cifs_close
,
747 .mmap
= cifs_file_mmap
,
748 .splice_read
= generic_file_splice_read
,
749 .llseek
= cifs_llseek
,
750 #ifdef CONFIG_CIFS_POSIX
751 .unlocked_ioctl
= cifs_ioctl
,
752 #endif /* CONFIG_CIFS_POSIX */
753 .setlease
= cifs_setlease
,
756 const struct file_operations cifs_file_strict_ops
= {
757 .read
= do_sync_read
,
758 .write
= do_sync_write
,
759 .aio_read
= cifs_strict_readv
,
760 .aio_write
= cifs_strict_writev
,
762 .release
= cifs_close
,
764 .fsync
= cifs_strict_fsync
,
766 .mmap
= cifs_file_strict_mmap
,
767 .splice_read
= generic_file_splice_read
,
768 .llseek
= cifs_llseek
,
769 #ifdef CONFIG_CIFS_POSIX
770 .unlocked_ioctl
= cifs_ioctl
,
771 #endif /* CONFIG_CIFS_POSIX */
772 .setlease
= cifs_setlease
,
775 const struct file_operations cifs_file_direct_ops
= {
776 /* BB reevaluate whether they can be done with directio, no cache */
777 .read
= do_sync_read
,
778 .write
= do_sync_write
,
779 .aio_read
= cifs_user_readv
,
780 .aio_write
= cifs_user_writev
,
782 .release
= cifs_close
,
786 .mmap
= cifs_file_mmap
,
787 .splice_read
= generic_file_splice_read
,
788 #ifdef CONFIG_CIFS_POSIX
789 .unlocked_ioctl
= cifs_ioctl
,
790 #endif /* CONFIG_CIFS_POSIX */
791 .llseek
= cifs_llseek
,
792 .setlease
= cifs_setlease
,
795 const struct file_operations cifs_file_nobrl_ops
= {
796 .read
= do_sync_read
,
797 .write
= do_sync_write
,
798 .aio_read
= generic_file_aio_read
,
799 .aio_write
= cifs_file_aio_write
,
801 .release
= cifs_close
,
804 .mmap
= cifs_file_mmap
,
805 .splice_read
= generic_file_splice_read
,
806 .llseek
= cifs_llseek
,
807 #ifdef CONFIG_CIFS_POSIX
808 .unlocked_ioctl
= cifs_ioctl
,
809 #endif /* CONFIG_CIFS_POSIX */
810 .setlease
= cifs_setlease
,
813 const struct file_operations cifs_file_strict_nobrl_ops
= {
814 .read
= do_sync_read
,
815 .write
= do_sync_write
,
816 .aio_read
= cifs_strict_readv
,
817 .aio_write
= cifs_strict_writev
,
819 .release
= cifs_close
,
820 .fsync
= cifs_strict_fsync
,
822 .mmap
= cifs_file_strict_mmap
,
823 .splice_read
= generic_file_splice_read
,
824 .llseek
= cifs_llseek
,
825 #ifdef CONFIG_CIFS_POSIX
826 .unlocked_ioctl
= cifs_ioctl
,
827 #endif /* CONFIG_CIFS_POSIX */
828 .setlease
= cifs_setlease
,
831 const struct file_operations cifs_file_direct_nobrl_ops
= {
832 /* BB reevaluate whether they can be done with directio, no cache */
833 .read
= do_sync_read
,
834 .write
= do_sync_write
,
835 .aio_read
= cifs_user_readv
,
836 .aio_write
= cifs_user_writev
,
838 .release
= cifs_close
,
841 .mmap
= cifs_file_mmap
,
842 .splice_read
= generic_file_splice_read
,
843 #ifdef CONFIG_CIFS_POSIX
844 .unlocked_ioctl
= cifs_ioctl
,
845 #endif /* CONFIG_CIFS_POSIX */
846 .llseek
= cifs_llseek
,
847 .setlease
= cifs_setlease
,
850 const struct file_operations cifs_dir_ops
= {
851 .readdir
= cifs_readdir
,
852 .release
= cifs_closedir
,
853 .read
= generic_read_dir
,
854 .unlocked_ioctl
= cifs_ioctl
,
855 .llseek
= generic_file_llseek
,
859 cifs_init_once(void *inode
)
861 struct cifsInodeInfo
*cifsi
= inode
;
863 inode_init_once(&cifsi
->vfs_inode
);
864 INIT_LIST_HEAD(&cifsi
->lockList
);
868 cifs_init_inodecache(void)
870 cifs_inode_cachep
= kmem_cache_create("cifs_inode_cache",
871 sizeof(struct cifsInodeInfo
),
872 0, (SLAB_RECLAIM_ACCOUNT
|
875 if (cifs_inode_cachep
== NULL
)
882 cifs_destroy_inodecache(void)
884 kmem_cache_destroy(cifs_inode_cachep
);
888 cifs_init_request_bufs(void)
890 if (CIFSMaxBufSize
< 8192) {
891 /* Buffer size can not be smaller than 2 * PATH_MAX since maximum
892 Unicode path name has to fit in any SMB/CIFS path based frames */
893 CIFSMaxBufSize
= 8192;
894 } else if (CIFSMaxBufSize
> 1024*127) {
895 CIFSMaxBufSize
= 1024 * 127;
897 CIFSMaxBufSize
&= 0x1FE00; /* Round size to even 512 byte mult*/
899 /* cERROR(1, "CIFSMaxBufSize %d 0x%x",CIFSMaxBufSize,CIFSMaxBufSize); */
900 cifs_req_cachep
= kmem_cache_create("cifs_request",
902 MAX_CIFS_HDR_SIZE
, 0,
903 SLAB_HWCACHE_ALIGN
, NULL
);
904 if (cifs_req_cachep
== NULL
)
907 if (cifs_min_rcv
< 1)
909 else if (cifs_min_rcv
> 64) {
911 cERROR(1, "cifs_min_rcv set to maximum (64)");
914 cifs_req_poolp
= mempool_create_slab_pool(cifs_min_rcv
,
917 if (cifs_req_poolp
== NULL
) {
918 kmem_cache_destroy(cifs_req_cachep
);
921 /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and
922 almost all handle based requests (but not write response, nor is it
923 sufficient for path based requests). A smaller size would have
924 been more efficient (compacting multiple slab items on one 4k page)
925 for the case in which debug was on, but this larger size allows
926 more SMBs to use small buffer alloc and is still much more
927 efficient to alloc 1 per page off the slab compared to 17K (5page)
928 alloc of large cifs buffers even when page debugging is on */
929 cifs_sm_req_cachep
= kmem_cache_create("cifs_small_rq",
930 MAX_CIFS_SMALL_BUFFER_SIZE
, 0, SLAB_HWCACHE_ALIGN
,
932 if (cifs_sm_req_cachep
== NULL
) {
933 mempool_destroy(cifs_req_poolp
);
934 kmem_cache_destroy(cifs_req_cachep
);
938 if (cifs_min_small
< 2)
940 else if (cifs_min_small
> 256) {
941 cifs_min_small
= 256;
942 cFYI(1, "cifs_min_small set to maximum (256)");
945 cifs_sm_req_poolp
= mempool_create_slab_pool(cifs_min_small
,
948 if (cifs_sm_req_poolp
== NULL
) {
949 mempool_destroy(cifs_req_poolp
);
950 kmem_cache_destroy(cifs_req_cachep
);
951 kmem_cache_destroy(cifs_sm_req_cachep
);
959 cifs_destroy_request_bufs(void)
961 mempool_destroy(cifs_req_poolp
);
962 kmem_cache_destroy(cifs_req_cachep
);
963 mempool_destroy(cifs_sm_req_poolp
);
964 kmem_cache_destroy(cifs_sm_req_cachep
);
970 cifs_mid_cachep
= kmem_cache_create("cifs_mpx_ids",
971 sizeof(struct mid_q_entry
), 0,
972 SLAB_HWCACHE_ALIGN
, NULL
);
973 if (cifs_mid_cachep
== NULL
)
976 /* 3 is a reasonable minimum number of simultaneous operations */
977 cifs_mid_poolp
= mempool_create_slab_pool(3, cifs_mid_cachep
);
978 if (cifs_mid_poolp
== NULL
) {
979 kmem_cache_destroy(cifs_mid_cachep
);
987 cifs_destroy_mids(void)
989 mempool_destroy(cifs_mid_poolp
);
990 kmem_cache_destroy(cifs_mid_cachep
);
998 INIT_LIST_HEAD(&cifs_tcp_ses_list
);
999 #ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
1000 INIT_LIST_HEAD(&GlobalDnotifyReqList
);
1001 INIT_LIST_HEAD(&GlobalDnotifyRsp_Q
);
1002 #endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
1004 * Initialize Global counters
1006 atomic_set(&sesInfoAllocCount
, 0);
1007 atomic_set(&tconInfoAllocCount
, 0);
1008 atomic_set(&tcpSesAllocCount
, 0);
1009 atomic_set(&tcpSesReconnectCount
, 0);
1010 atomic_set(&tconInfoReconnectCount
, 0);
1012 atomic_set(&bufAllocCount
, 0);
1013 atomic_set(&smBufAllocCount
, 0);
1014 #ifdef CONFIG_CIFS_STATS2
1015 atomic_set(&totBufAllocCount
, 0);
1016 atomic_set(&totSmBufAllocCount
, 0);
1017 #endif /* CONFIG_CIFS_STATS2 */
1019 atomic_set(&midCount
, 0);
1020 GlobalCurrentXid
= 0;
1021 GlobalTotalActiveXid
= 0;
1022 GlobalMaxActiveXid
= 0;
1023 spin_lock_init(&cifs_tcp_ses_lock
);
1024 spin_lock_init(&cifs_file_list_lock
);
1025 spin_lock_init(&GlobalMid_Lock
);
1027 if (cifs_max_pending
< 2) {
1028 cifs_max_pending
= 2;
1029 cFYI(1, "cifs_max_pending set to min of 2");
1030 } else if (cifs_max_pending
> 256) {
1031 cifs_max_pending
= 256;
1032 cFYI(1, "cifs_max_pending set to max of 256");
1035 rc
= cifs_fscache_register();
1037 goto out_clean_proc
;
1039 rc
= cifs_init_inodecache();
1041 goto out_unreg_fscache
;
1043 rc
= cifs_init_mids();
1045 goto out_destroy_inodecache
;
1047 rc
= cifs_init_request_bufs();
1049 goto out_destroy_mids
;
1051 #ifdef CONFIG_CIFS_UPCALL
1052 rc
= register_key_type(&cifs_spnego_key_type
);
1054 goto out_destroy_request_bufs
;
1055 #endif /* CONFIG_CIFS_UPCALL */
1057 #ifdef CONFIG_CIFS_ACL
1058 rc
= init_cifs_idmap();
1060 goto out_destroy_request_bufs
;
1061 #endif /* CONFIG_CIFS_ACL */
1063 rc
= register_filesystem(&cifs_fs_type
);
1065 goto out_destroy_request_bufs
;
1069 out_destroy_request_bufs
:
1070 #ifdef CONFIG_CIFS_ACL
1073 #ifdef CONFIG_CIFS_UPCALL
1074 unregister_key_type(&cifs_spnego_key_type
);
1076 cifs_destroy_request_bufs();
1078 cifs_destroy_mids();
1079 out_destroy_inodecache
:
1080 cifs_destroy_inodecache();
1082 cifs_fscache_unregister();
1091 cFYI(DBG2
, "exit_cifs");
1093 cifs_fscache_unregister();
1094 #ifdef CONFIG_CIFS_DFS_UPCALL
1095 cifs_dfs_release_automount_timer();
1097 #ifdef CONFIG_CIFS_ACL
1098 cifs_destroy_idmaptrees();
1101 #ifdef CONFIG_CIFS_UPCALL
1102 unregister_key_type(&cifs_spnego_key_type
);
1104 unregister_filesystem(&cifs_fs_type
);
1105 cifs_destroy_inodecache();
1106 cifs_destroy_mids();
1107 cifs_destroy_request_bufs();
1110 MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>");
1111 MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */
1113 ("VFS to access servers complying with the SNIA CIFS Specification "
1114 "e.g. Samba and Windows");
1115 MODULE_VERSION(CIFS_VERSION
);
1116 module_init(init_cifs
)
1117 module_exit(exit_cifs
)