4 * Copyright (C) International Business Machines Corp., 2002,2008
5 * Author(s): Steve French (sfrench@us.ibm.com)
7 * Common Internet FileSystem (CIFS) client
9 * This library is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU Lesser General Public License as published
11 * by the Free Software Foundation; either version 2.1 of the License, or
12 * (at your option) any later version.
14 * This library is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
17 * the GNU Lesser General Public License for more details.
19 * You should have received a copy of the GNU Lesser General Public License
20 * along with this library; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 /* Note that BB means BUGBUG (ie something to fix eventually) */
26 #include <linux/module.h>
28 #include <linux/mount.h>
29 #include <linux/slab.h>
30 #include <linux/init.h>
31 #include <linux/list.h>
32 #include <linux/seq_file.h>
33 #include <linux/vfs.h>
34 #include <linux/mempool.h>
35 #include <linux/delay.h>
36 #include <linux/kthread.h>
37 #include <linux/freezer.h>
38 #include <linux/smp_lock.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 "dns_resolve.h"
49 #include "cifs_spnego.h"
50 #define CIFS_MAGIC_NUMBER 0xFF534D42 /* the first four bytes of SMB PDUs */
52 #ifdef CONFIG_CIFS_QUOTA
53 static const struct quotactl_ops cifs_quotactl_ops
;
59 unsigned int oplockEnabled
= 1;
60 unsigned int experimEnabled
= 0;
61 unsigned int linuxExtEnabled
= 1;
62 unsigned int lookupCacheEnabled
= 1;
63 unsigned int multiuser_mount
= 0;
64 unsigned int extended_security
= CIFSSEC_DEF
;
65 /* unsigned int ntlmv2_support = 0; */
66 unsigned int sign_CIFS_PDUs
= 1;
67 static const struct super_operations cifs_super_ops
;
68 unsigned int CIFSMaxBufSize
= CIFS_MAX_MSGSIZE
;
69 module_param(CIFSMaxBufSize
, int, 0);
70 MODULE_PARM_DESC(CIFSMaxBufSize
, "Network buffer size (not including header). "
71 "Default: 16384 Range: 8192 to 130048");
72 unsigned int cifs_min_rcv
= CIFS_MIN_RCV_POOL
;
73 module_param(cifs_min_rcv
, int, 0);
74 MODULE_PARM_DESC(cifs_min_rcv
, "Network buffers in pool. Default: 4 Range: "
76 unsigned int cifs_min_small
= 30;
77 module_param(cifs_min_small
, int, 0);
78 MODULE_PARM_DESC(cifs_min_small
, "Small network buffers in pool. Default: 30 "
80 unsigned int cifs_max_pending
= CIFS_MAX_REQ
;
81 module_param(cifs_max_pending
, int, 0);
82 MODULE_PARM_DESC(cifs_max_pending
, "Simultaneous requests to server. "
83 "Default: 50 Range: 2 to 256");
85 extern mempool_t
*cifs_sm_req_poolp
;
86 extern mempool_t
*cifs_req_poolp
;
87 extern mempool_t
*cifs_mid_poolp
;
89 extern struct kmem_cache
*cifs_oplock_cachep
;
92 cifs_read_super(struct super_block
*sb
, void *data
,
93 const char *devname
, int silent
)
96 struct cifs_sb_info
*cifs_sb
;
99 /* BB should we make this contingent on mount parm? */
100 sb
->s_flags
|= MS_NODIRATIME
| MS_NOATIME
;
101 sb
->s_fs_info
= kzalloc(sizeof(struct cifs_sb_info
), GFP_KERNEL
);
102 cifs_sb
= CIFS_SB(sb
);
106 #ifdef CONFIG_CIFS_DFS_UPCALL
107 /* copy mount params to sb for use in submounts */
108 /* BB: should we move this after the mount so we
109 * do not have to do the copy on failed mounts?
110 * BB: May be it is better to do simple copy before
111 * complex operation (mount), and in case of fail
112 * just exit instead of doing mount and attempting
113 * undo it if this copy fails?*/
115 int len
= strlen(data
);
116 cifs_sb
->mountdata
= kzalloc(len
+ 1, GFP_KERNEL
);
117 if (cifs_sb
->mountdata
== NULL
) {
118 kfree(sb
->s_fs_info
);
119 sb
->s_fs_info
= NULL
;
122 strncpy(cifs_sb
->mountdata
, data
, len
+ 1);
123 cifs_sb
->mountdata
[len
] = '\0';
127 rc
= cifs_mount(sb
, cifs_sb
, data
, devname
);
132 ("cifs_mount failed w/return code = %d", rc
));
133 goto out_mount_failed
;
136 sb
->s_magic
= CIFS_MAGIC_NUMBER
;
137 sb
->s_op
= &cifs_super_ops
;
138 /* if (cifs_sb->tcon->ses->server->maxBuf > MAX_CIFS_HDR_SIZE + 512)
140 cifs_sb->tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE; */
141 #ifdef CONFIG_CIFS_QUOTA
142 sb
->s_qcop
= &cifs_quotactl_ops
;
144 sb
->s_blocksize
= CIFS_MAX_MSGSIZE
;
145 sb
->s_blocksize_bits
= 14; /* default 2**14 = CIFS_MAX_MSGSIZE */
146 inode
= cifs_root_iget(sb
, ROOT_I
);
154 sb
->s_root
= d_alloc_root(inode
);
161 #ifdef CONFIG_CIFS_EXPERIMENTAL
162 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_SERVER_INUM
) {
163 cFYI(1, ("export ops supported"));
164 sb
->s_export_op
= &cifs_export_ops
;
166 #endif /* EXPERIMENTAL */
171 cERROR(1, ("cifs_read_super: get root inode failed"));
175 cifs_umount(sb
, cifs_sb
);
179 #ifdef CONFIG_CIFS_DFS_UPCALL
180 if (cifs_sb
->mountdata
) {
181 kfree(cifs_sb
->mountdata
);
182 cifs_sb
->mountdata
= NULL
;
185 unload_nls(cifs_sb
->local_nls
);
192 cifs_put_super(struct super_block
*sb
)
195 struct cifs_sb_info
*cifs_sb
;
197 cFYI(1, ("In cifs_put_super"));
198 cifs_sb
= CIFS_SB(sb
);
199 if (cifs_sb
== NULL
) {
200 cFYI(1, ("Empty cifs superblock info passed to unmount"));
206 rc
= cifs_umount(sb
, cifs_sb
);
208 cERROR(1, ("cifs_umount failed with return code %d", rc
));
209 #ifdef CONFIG_CIFS_DFS_UPCALL
210 if (cifs_sb
->mountdata
) {
211 kfree(cifs_sb
->mountdata
);
212 cifs_sb
->mountdata
= NULL
;
216 unload_nls(cifs_sb
->local_nls
);
223 cifs_statfs(struct dentry
*dentry
, struct kstatfs
*buf
)
225 struct super_block
*sb
= dentry
->d_sb
;
226 struct cifs_sb_info
*cifs_sb
= CIFS_SB(sb
);
227 struct cifsTconInfo
*tcon
= cifs_sb
->tcon
;
228 int rc
= -EOPNOTSUPP
;
233 buf
->f_type
= CIFS_MAGIC_NUMBER
;
236 * PATH_MAX may be too long - it would presumably be total path,
237 * but note that some servers (includinng Samba 3) have a shorter
240 * Instead could get the real value via SMB_QUERY_FS_ATTRIBUTE_INFO.
242 buf
->f_namelen
= PATH_MAX
;
243 buf
->f_files
= 0; /* undefined */
244 buf
->f_ffree
= 0; /* unlimited */
247 * We could add a second check for a QFS Unix capability bit
249 if ((tcon
->ses
->capabilities
& CAP_UNIX
) &&
250 (CIFS_POSIX_EXTENSIONS
& le64_to_cpu(tcon
->fsUnixInfo
.Capability
)))
251 rc
= CIFSSMBQFSPosixInfo(xid
, tcon
, buf
);
254 * Only need to call the old QFSInfo if failed on newer one,
257 if (rc
&& (tcon
->ses
->capabilities
& CAP_NT_SMBS
))
258 rc
= CIFSSMBQFSInfo(xid
, tcon
, buf
);
261 * Some old Windows servers also do not support level 103, retry with
262 * older level one if old server failed the previous call or we
263 * bypassed it because we detected that this was an older LANMAN sess
266 rc
= SMBOldQFSInfo(xid
, tcon
, buf
);
272 static int cifs_permission(struct inode
*inode
, int mask
)
274 struct cifs_sb_info
*cifs_sb
;
276 cifs_sb
= CIFS_SB(inode
->i_sb
);
278 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_NO_PERM
) {
279 if ((mask
& MAY_EXEC
) && !execute_ok(inode
))
283 } else /* file mode might have been restricted at mount time
284 on the client (above and beyond ACL on servers) for
285 servers which do not support setting and viewing mode bits,
286 so allowing client to check permissions is useful */
287 return generic_permission(inode
, mask
, NULL
);
290 static struct kmem_cache
*cifs_inode_cachep
;
291 static struct kmem_cache
*cifs_req_cachep
;
292 static struct kmem_cache
*cifs_mid_cachep
;
293 struct kmem_cache
*cifs_oplock_cachep
;
294 static struct kmem_cache
*cifs_sm_req_cachep
;
295 mempool_t
*cifs_sm_req_poolp
;
296 mempool_t
*cifs_req_poolp
;
297 mempool_t
*cifs_mid_poolp
;
299 static struct inode
*
300 cifs_alloc_inode(struct super_block
*sb
)
302 struct cifsInodeInfo
*cifs_inode
;
303 cifs_inode
= kmem_cache_alloc(cifs_inode_cachep
, GFP_KERNEL
);
306 cifs_inode
->cifsAttrs
= 0x20; /* default */
307 cifs_inode
->time
= 0;
308 cifs_inode
->write_behind_rc
= 0;
309 /* Until the file is open and we have gotten oplock
310 info back from the server, can not assume caching of
311 file data or metadata */
312 cifs_inode
->clientCanCacheRead
= false;
313 cifs_inode
->clientCanCacheAll
= false;
314 cifs_inode
->delete_pending
= false;
315 cifs_inode
->invalid_mapping
= false;
316 cifs_inode
->vfs_inode
.i_blkbits
= 14; /* 2**14 = CIFS_MAX_MSGSIZE */
317 cifs_inode
->server_eof
= 0;
319 /* Can not set i_flags here - they get immediately overwritten
320 to zero by the VFS */
321 /* cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME;*/
322 INIT_LIST_HEAD(&cifs_inode
->openFileList
);
323 return &cifs_inode
->vfs_inode
;
327 cifs_destroy_inode(struct inode
*inode
)
329 kmem_cache_free(cifs_inode_cachep
, CIFS_I(inode
));
333 cifs_show_address(struct seq_file
*s
, struct TCP_Server_Info
*server
)
335 seq_printf(s
, ",addr=");
337 switch (server
->addr
.sockAddr
.sin_family
) {
339 seq_printf(s
, "%pI4", &server
->addr
.sockAddr
.sin_addr
.s_addr
);
342 seq_printf(s
, "%pI6",
343 &server
->addr
.sockAddr6
.sin6_addr
.s6_addr
);
344 if (server
->addr
.sockAddr6
.sin6_scope_id
)
345 seq_printf(s
, "%%%u",
346 server
->addr
.sockAddr6
.sin6_scope_id
);
349 seq_printf(s
, "(unknown)");
354 * cifs_show_options() is for displaying mount options in /proc/mounts.
355 * Not all settable options are displayed but most of the important
359 cifs_show_options(struct seq_file
*s
, struct vfsmount
*m
)
361 struct cifs_sb_info
*cifs_sb
= CIFS_SB(m
->mnt_sb
);
362 struct cifsTconInfo
*tcon
= cifs_sb
->tcon
;
364 seq_printf(s
, ",unc=%s", tcon
->treeName
);
365 if (tcon
->ses
->userName
)
366 seq_printf(s
, ",username=%s", tcon
->ses
->userName
);
367 if (tcon
->ses
->domainName
)
368 seq_printf(s
, ",domain=%s", tcon
->ses
->domainName
);
370 seq_printf(s
, ",uid=%d", cifs_sb
->mnt_uid
);
371 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_OVERR_UID
)
372 seq_printf(s
, ",forceuid");
374 seq_printf(s
, ",noforceuid");
376 seq_printf(s
, ",gid=%d", cifs_sb
->mnt_gid
);
377 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_OVERR_GID
)
378 seq_printf(s
, ",forcegid");
380 seq_printf(s
, ",noforcegid");
382 cifs_show_address(s
, tcon
->ses
->server
);
385 seq_printf(s
, ",file_mode=0%o,dir_mode=0%o",
386 cifs_sb
->mnt_file_mode
,
387 cifs_sb
->mnt_dir_mode
);
389 seq_printf(s
, ",seal");
391 seq_printf(s
, ",nocase");
393 seq_printf(s
, ",hard");
394 if (cifs_sb
->prepath
)
395 seq_printf(s
, ",prepath=%s", cifs_sb
->prepath
);
396 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_POSIX_PATHS
)
397 seq_printf(s
, ",posixpaths");
398 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_SET_UID
)
399 seq_printf(s
, ",setuids");
400 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_SERVER_INUM
)
401 seq_printf(s
, ",serverino");
402 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_DIRECT_IO
)
403 seq_printf(s
, ",directio");
404 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_NO_XATTR
)
405 seq_printf(s
, ",nouser_xattr");
406 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_MAP_SPECIAL_CHR
)
407 seq_printf(s
, ",mapchars");
408 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_UNX_EMUL
)
409 seq_printf(s
, ",sfu");
410 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_NO_BRL
)
411 seq_printf(s
, ",nobrl");
412 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_CIFS_ACL
)
413 seq_printf(s
, ",cifsacl");
414 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_DYNPERM
)
415 seq_printf(s
, ",dynperm");
416 if (m
->mnt_sb
->s_flags
& MS_POSIXACL
)
417 seq_printf(s
, ",acl");
419 seq_printf(s
, ",rsize=%d", cifs_sb
->rsize
);
420 seq_printf(s
, ",wsize=%d", cifs_sb
->wsize
);
425 #ifdef CONFIG_CIFS_QUOTA
426 int cifs_xquota_set(struct super_block
*sb
, int quota_type
, qid_t qid
,
427 struct fs_disk_quota
*pdquota
)
431 struct cifs_sb_info
*cifs_sb
= CIFS_SB(sb
);
432 struct cifsTconInfo
*pTcon
;
435 pTcon
= cifs_sb
->tcon
;
442 cFYI(1, ("set type: 0x%x id: %d", quota_type
, qid
));
450 int cifs_xquota_get(struct super_block
*sb
, int quota_type
, qid_t qid
,
451 struct fs_disk_quota
*pdquota
)
455 struct cifs_sb_info
*cifs_sb
= CIFS_SB(sb
);
456 struct cifsTconInfo
*pTcon
;
459 pTcon
= cifs_sb
->tcon
;
465 cFYI(1, ("set type: 0x%x id: %d", quota_type
, qid
));
473 int cifs_xstate_set(struct super_block
*sb
, unsigned int flags
, int operation
)
477 struct cifs_sb_info
*cifs_sb
= CIFS_SB(sb
);
478 struct cifsTconInfo
*pTcon
;
481 pTcon
= cifs_sb
->tcon
;
487 cFYI(1, ("flags: 0x%x operation: 0x%x", flags
, operation
));
495 int cifs_xstate_get(struct super_block
*sb
, struct fs_quota_stat
*qstats
)
499 struct cifs_sb_info
*cifs_sb
= CIFS_SB(sb
);
500 struct cifsTconInfo
*pTcon
;
503 pTcon
= cifs_sb
->tcon
;
509 cFYI(1, ("pqstats %p", qstats
));
517 static const struct quotactl_ops cifs_quotactl_ops
= {
518 .set_xquota
= cifs_xquota_set
,
519 .get_xquota
= cifs_xquota_get
,
520 .set_xstate
= cifs_xstate_set
,
521 .get_xstate
= cifs_xstate_get
,
525 static void cifs_umount_begin(struct super_block
*sb
)
527 struct cifs_sb_info
*cifs_sb
= CIFS_SB(sb
);
528 struct cifsTconInfo
*tcon
;
533 tcon
= cifs_sb
->tcon
;
537 read_lock(&cifs_tcp_ses_lock
);
538 if ((tcon
->tc_count
> 1) || (tcon
->tidStatus
== CifsExiting
)) {
539 /* we have other mounts to same share or we have
540 already tried to force umount this and woken up
541 all waiting network requests, nothing to do */
542 read_unlock(&cifs_tcp_ses_lock
);
544 } else if (tcon
->tc_count
== 1)
545 tcon
->tidStatus
= CifsExiting
;
546 read_unlock(&cifs_tcp_ses_lock
);
548 /* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */
549 /* cancel_notify_requests(tcon); */
550 if (tcon
->ses
&& tcon
->ses
->server
) {
551 cFYI(1, ("wake up tasks now - umount begin not complete"));
552 wake_up_all(&tcon
->ses
->server
->request_q
);
553 wake_up_all(&tcon
->ses
->server
->response_q
);
554 msleep(1); /* yield */
555 /* we have to kick the requests once more */
556 wake_up_all(&tcon
->ses
->server
->response_q
);
563 #ifdef CONFIG_CIFS_STATS2
564 static int cifs_show_stats(struct seq_file
*s
, struct vfsmount
*mnt
)
571 static int cifs_remount(struct super_block
*sb
, int *flags
, char *data
)
573 *flags
|= MS_NODIRATIME
;
577 static const struct super_operations cifs_super_ops
= {
578 .put_super
= cifs_put_super
,
579 .statfs
= cifs_statfs
,
580 .alloc_inode
= cifs_alloc_inode
,
581 .destroy_inode
= cifs_destroy_inode
,
582 /* .drop_inode = generic_delete_inode,
583 .delete_inode = cifs_delete_inode, */ /* Do not need above two
584 functions unless later we add lazy close of inodes or unless the
585 kernel forgets to call us with the same number of releases (closes)
587 .show_options
= cifs_show_options
,
588 .umount_begin
= cifs_umount_begin
,
589 .remount_fs
= cifs_remount
,
590 #ifdef CONFIG_CIFS_STATS2
591 .show_stats
= cifs_show_stats
,
596 cifs_get_sb(struct file_system_type
*fs_type
,
597 int flags
, const char *dev_name
, void *data
, struct vfsmount
*mnt
)
600 struct super_block
*sb
= sget(fs_type
, NULL
, set_anon_super
, NULL
);
602 cFYI(1, ("Devname: %s flags: %d ", dev_name
, flags
));
609 rc
= cifs_read_super(sb
, data
, dev_name
, flags
& MS_SILENT
? 1 : 0);
611 deactivate_locked_super(sb
);
614 sb
->s_flags
|= MS_ACTIVE
;
615 simple_set_mnt(mnt
, sb
);
619 static ssize_t
cifs_file_aio_write(struct kiocb
*iocb
, const struct iovec
*iov
,
620 unsigned long nr_segs
, loff_t pos
)
622 struct inode
*inode
= iocb
->ki_filp
->f_path
.dentry
->d_inode
;
625 written
= generic_file_aio_write(iocb
, iov
, nr_segs
, pos
);
626 if (!CIFS_I(inode
)->clientCanCacheAll
)
627 filemap_fdatawrite(inode
->i_mapping
);
631 static loff_t
cifs_llseek(struct file
*file
, loff_t offset
, int origin
)
633 /* origin == SEEK_END => we must revalidate the cached file length */
634 if (origin
== SEEK_END
) {
637 /* some applications poll for the file length in this strange
638 way so we must seek to end on non-oplocked files by
639 setting the revalidate time to zero */
640 CIFS_I(file
->f_path
.dentry
->d_inode
)->time
= 0;
642 retval
= cifs_revalidate_dentry(file
->f_path
.dentry
);
644 return (loff_t
)retval
;
646 return generic_file_llseek_unlocked(file
, offset
, origin
);
649 #ifdef CONFIG_CIFS_EXPERIMENTAL
650 static int cifs_setlease(struct file
*file
, long arg
, struct file_lock
**lease
)
652 /* note that this is called by vfs setlease with the BKL held
653 although I doubt that BKL is needed here in cifs */
654 struct inode
*inode
= file
->f_path
.dentry
->d_inode
;
656 if (!(S_ISREG(inode
->i_mode
)))
659 /* check if file is oplocked */
660 if (((arg
== F_RDLCK
) &&
661 (CIFS_I(inode
)->clientCanCacheRead
)) ||
663 (CIFS_I(inode
)->clientCanCacheAll
)))
664 return generic_setlease(file
, arg
, lease
);
665 else if (CIFS_SB(inode
->i_sb
)->tcon
->local_lease
&&
666 !CIFS_I(inode
)->clientCanCacheRead
)
667 /* If the server claims to support oplock on this
668 file, then we still need to check oplock even
669 if the local_lease mount option is set, but there
670 are servers which do not support oplock for which
671 this mount option may be useful if the user
672 knows that the file won't be changed on the server
674 return generic_setlease(file
, arg
, lease
);
680 struct file_system_type cifs_fs_type
= {
681 .owner
= THIS_MODULE
,
683 .get_sb
= cifs_get_sb
,
684 .kill_sb
= kill_anon_super
,
687 const struct inode_operations cifs_dir_inode_ops
= {
688 .create
= cifs_create
,
689 .lookup
= cifs_lookup
,
690 .getattr
= cifs_getattr
,
691 .unlink
= cifs_unlink
,
692 .link
= cifs_hardlink
,
695 .rename
= cifs_rename
,
696 .permission
= cifs_permission
,
697 /* revalidate:cifs_revalidate, */
698 .setattr
= cifs_setattr
,
699 .symlink
= cifs_symlink
,
701 #ifdef CONFIG_CIFS_XATTR
702 .setxattr
= cifs_setxattr
,
703 .getxattr
= cifs_getxattr
,
704 .listxattr
= cifs_listxattr
,
705 .removexattr
= cifs_removexattr
,
709 const struct inode_operations cifs_file_inode_ops
= {
710 /* revalidate:cifs_revalidate, */
711 .setattr
= cifs_setattr
,
712 .getattr
= cifs_getattr
, /* do we need this anymore? */
713 .rename
= cifs_rename
,
714 .permission
= cifs_permission
,
715 #ifdef CONFIG_CIFS_XATTR
716 .setxattr
= cifs_setxattr
,
717 .getxattr
= cifs_getxattr
,
718 .listxattr
= cifs_listxattr
,
719 .removexattr
= cifs_removexattr
,
723 const struct inode_operations cifs_symlink_inode_ops
= {
724 .readlink
= generic_readlink
,
725 .follow_link
= cifs_follow_link
,
726 .put_link
= cifs_put_link
,
727 .permission
= cifs_permission
,
728 /* BB add the following two eventually */
729 /* revalidate: cifs_revalidate,
730 setattr: cifs_notify_change, *//* BB do we need notify change */
731 #ifdef CONFIG_CIFS_XATTR
732 .setxattr
= cifs_setxattr
,
733 .getxattr
= cifs_getxattr
,
734 .listxattr
= cifs_listxattr
,
735 .removexattr
= cifs_removexattr
,
739 const struct file_operations cifs_file_ops
= {
740 .read
= do_sync_read
,
741 .write
= do_sync_write
,
742 .aio_read
= generic_file_aio_read
,
743 .aio_write
= cifs_file_aio_write
,
745 .release
= cifs_close
,
749 .mmap
= cifs_file_mmap
,
750 .splice_read
= generic_file_splice_read
,
751 .llseek
= cifs_llseek
,
752 #ifdef CONFIG_CIFS_POSIX
753 .unlocked_ioctl
= cifs_ioctl
,
754 #endif /* CONFIG_CIFS_POSIX */
756 #ifdef CONFIG_CIFS_EXPERIMENTAL
757 .setlease
= cifs_setlease
,
758 #endif /* CONFIG_CIFS_EXPERIMENTAL */
761 const struct file_operations cifs_file_direct_ops
= {
762 /* no aio, no readv -
763 BB reevaluate whether they can be done with directio, no cache */
764 .read
= cifs_user_read
,
765 .write
= cifs_user_write
,
767 .release
= cifs_close
,
771 .mmap
= cifs_file_mmap
,
772 .splice_read
= generic_file_splice_read
,
773 #ifdef CONFIG_CIFS_POSIX
774 .unlocked_ioctl
= cifs_ioctl
,
775 #endif /* CONFIG_CIFS_POSIX */
776 .llseek
= cifs_llseek
,
777 #ifdef CONFIG_CIFS_EXPERIMENTAL
778 .setlease
= cifs_setlease
,
779 #endif /* CONFIG_CIFS_EXPERIMENTAL */
781 const struct file_operations cifs_file_nobrl_ops
= {
782 .read
= do_sync_read
,
783 .write
= do_sync_write
,
784 .aio_read
= generic_file_aio_read
,
785 .aio_write
= cifs_file_aio_write
,
787 .release
= cifs_close
,
790 .mmap
= cifs_file_mmap
,
791 .splice_read
= generic_file_splice_read
,
792 .llseek
= cifs_llseek
,
793 #ifdef CONFIG_CIFS_POSIX
794 .unlocked_ioctl
= cifs_ioctl
,
795 #endif /* CONFIG_CIFS_POSIX */
797 #ifdef CONFIG_CIFS_EXPERIMENTAL
798 .setlease
= cifs_setlease
,
799 #endif /* CONFIG_CIFS_EXPERIMENTAL */
802 const struct file_operations cifs_file_direct_nobrl_ops
= {
803 /* no mmap, no aio, no readv -
804 BB reevaluate whether they can be done with directio, no cache */
805 .read
= cifs_user_read
,
806 .write
= cifs_user_write
,
808 .release
= cifs_close
,
811 .splice_read
= generic_file_splice_read
,
812 #ifdef CONFIG_CIFS_POSIX
813 .unlocked_ioctl
= cifs_ioctl
,
814 #endif /* CONFIG_CIFS_POSIX */
815 .llseek
= cifs_llseek
,
816 #ifdef CONFIG_CIFS_EXPERIMENTAL
817 .setlease
= cifs_setlease
,
818 #endif /* CONFIG_CIFS_EXPERIMENTAL */
821 const struct file_operations cifs_dir_ops
= {
822 .readdir
= cifs_readdir
,
823 .release
= cifs_closedir
,
824 .read
= generic_read_dir
,
825 .unlocked_ioctl
= cifs_ioctl
,
826 .llseek
= generic_file_llseek
,
830 cifs_init_once(void *inode
)
832 struct cifsInodeInfo
*cifsi
= inode
;
834 inode_init_once(&cifsi
->vfs_inode
);
835 INIT_LIST_HEAD(&cifsi
->lockList
);
839 cifs_init_inodecache(void)
841 cifs_inode_cachep
= kmem_cache_create("cifs_inode_cache",
842 sizeof(struct cifsInodeInfo
),
843 0, (SLAB_RECLAIM_ACCOUNT
|
846 if (cifs_inode_cachep
== NULL
)
853 cifs_destroy_inodecache(void)
855 kmem_cache_destroy(cifs_inode_cachep
);
859 cifs_init_request_bufs(void)
861 if (CIFSMaxBufSize
< 8192) {
862 /* Buffer size can not be smaller than 2 * PATH_MAX since maximum
863 Unicode path name has to fit in any SMB/CIFS path based frames */
864 CIFSMaxBufSize
= 8192;
865 } else if (CIFSMaxBufSize
> 1024*127) {
866 CIFSMaxBufSize
= 1024 * 127;
868 CIFSMaxBufSize
&= 0x1FE00; /* Round size to even 512 byte mult*/
870 /* cERROR(1,("CIFSMaxBufSize %d 0x%x",CIFSMaxBufSize,CIFSMaxBufSize)); */
871 cifs_req_cachep
= kmem_cache_create("cifs_request",
873 MAX_CIFS_HDR_SIZE
, 0,
874 SLAB_HWCACHE_ALIGN
, NULL
);
875 if (cifs_req_cachep
== NULL
)
878 if (cifs_min_rcv
< 1)
880 else if (cifs_min_rcv
> 64) {
882 cERROR(1, ("cifs_min_rcv set to maximum (64)"));
885 cifs_req_poolp
= mempool_create_slab_pool(cifs_min_rcv
,
888 if (cifs_req_poolp
== NULL
) {
889 kmem_cache_destroy(cifs_req_cachep
);
892 /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and
893 almost all handle based requests (but not write response, nor is it
894 sufficient for path based requests). A smaller size would have
895 been more efficient (compacting multiple slab items on one 4k page)
896 for the case in which debug was on, but this larger size allows
897 more SMBs to use small buffer alloc and is still much more
898 efficient to alloc 1 per page off the slab compared to 17K (5page)
899 alloc of large cifs buffers even when page debugging is on */
900 cifs_sm_req_cachep
= kmem_cache_create("cifs_small_rq",
901 MAX_CIFS_SMALL_BUFFER_SIZE
, 0, SLAB_HWCACHE_ALIGN
,
903 if (cifs_sm_req_cachep
== NULL
) {
904 mempool_destroy(cifs_req_poolp
);
905 kmem_cache_destroy(cifs_req_cachep
);
909 if (cifs_min_small
< 2)
911 else if (cifs_min_small
> 256) {
912 cifs_min_small
= 256;
913 cFYI(1, ("cifs_min_small set to maximum (256)"));
916 cifs_sm_req_poolp
= mempool_create_slab_pool(cifs_min_small
,
919 if (cifs_sm_req_poolp
== NULL
) {
920 mempool_destroy(cifs_req_poolp
);
921 kmem_cache_destroy(cifs_req_cachep
);
922 kmem_cache_destroy(cifs_sm_req_cachep
);
930 cifs_destroy_request_bufs(void)
932 mempool_destroy(cifs_req_poolp
);
933 kmem_cache_destroy(cifs_req_cachep
);
934 mempool_destroy(cifs_sm_req_poolp
);
935 kmem_cache_destroy(cifs_sm_req_cachep
);
941 cifs_mid_cachep
= kmem_cache_create("cifs_mpx_ids",
942 sizeof(struct mid_q_entry
), 0,
943 SLAB_HWCACHE_ALIGN
, NULL
);
944 if (cifs_mid_cachep
== NULL
)
947 /* 3 is a reasonable minimum number of simultaneous operations */
948 cifs_mid_poolp
= mempool_create_slab_pool(3, cifs_mid_cachep
);
949 if (cifs_mid_poolp
== NULL
) {
950 kmem_cache_destroy(cifs_mid_cachep
);
954 cifs_oplock_cachep
= kmem_cache_create("cifs_oplock_structs",
955 sizeof(struct oplock_q_entry
), 0,
956 SLAB_HWCACHE_ALIGN
, NULL
);
957 if (cifs_oplock_cachep
== NULL
) {
958 mempool_destroy(cifs_mid_poolp
);
959 kmem_cache_destroy(cifs_mid_cachep
);
967 cifs_destroy_mids(void)
969 mempool_destroy(cifs_mid_poolp
);
970 kmem_cache_destroy(cifs_mid_cachep
);
971 kmem_cache_destroy(cifs_oplock_cachep
);
979 INIT_LIST_HEAD(&cifs_tcp_ses_list
);
980 #ifdef CONFIG_CIFS_EXPERIMENTAL
981 INIT_LIST_HEAD(&GlobalDnotifyReqList
);
982 INIT_LIST_HEAD(&GlobalDnotifyRsp_Q
);
985 * Initialize Global counters
987 atomic_set(&sesInfoAllocCount
, 0);
988 atomic_set(&tconInfoAllocCount
, 0);
989 atomic_set(&tcpSesAllocCount
, 0);
990 atomic_set(&tcpSesReconnectCount
, 0);
991 atomic_set(&tconInfoReconnectCount
, 0);
993 atomic_set(&bufAllocCount
, 0);
994 atomic_set(&smBufAllocCount
, 0);
995 #ifdef CONFIG_CIFS_STATS2
996 atomic_set(&totBufAllocCount
, 0);
997 atomic_set(&totSmBufAllocCount
, 0);
998 #endif /* CONFIG_CIFS_STATS2 */
1000 atomic_set(&midCount
, 0);
1001 GlobalCurrentXid
= 0;
1002 GlobalTotalActiveXid
= 0;
1003 GlobalMaxActiveXid
= 0;
1004 memset(Local_System_Name
, 0, 15);
1005 rwlock_init(&GlobalSMBSeslock
);
1006 rwlock_init(&cifs_tcp_ses_lock
);
1007 spin_lock_init(&GlobalMid_Lock
);
1009 if (cifs_max_pending
< 2) {
1010 cifs_max_pending
= 2;
1011 cFYI(1, ("cifs_max_pending set to min of 2"));
1012 } else if (cifs_max_pending
> 256) {
1013 cifs_max_pending
= 256;
1014 cFYI(1, ("cifs_max_pending set to max of 256"));
1017 rc
= cifs_init_inodecache();
1019 goto out_clean_proc
;
1021 rc
= cifs_init_mids();
1023 goto out_destroy_inodecache
;
1025 rc
= cifs_init_request_bufs();
1027 goto out_destroy_mids
;
1029 rc
= register_filesystem(&cifs_fs_type
);
1031 goto out_destroy_request_bufs
;
1032 #ifdef CONFIG_CIFS_UPCALL
1033 rc
= register_key_type(&cifs_spnego_key_type
);
1035 goto out_unregister_filesystem
;
1037 #ifdef CONFIG_CIFS_DFS_UPCALL
1038 rc
= register_key_type(&key_type_dns_resolver
);
1040 goto out_unregister_key_type
;
1042 rc
= slow_work_register_user(THIS_MODULE
);
1044 goto out_unregister_resolver_key
;
1048 out_unregister_resolver_key
:
1049 #ifdef CONFIG_CIFS_DFS_UPCALL
1050 unregister_key_type(&key_type_dns_resolver
);
1051 out_unregister_key_type
:
1053 #ifdef CONFIG_CIFS_UPCALL
1054 unregister_key_type(&cifs_spnego_key_type
);
1055 out_unregister_filesystem
:
1057 unregister_filesystem(&cifs_fs_type
);
1058 out_destroy_request_bufs
:
1059 cifs_destroy_request_bufs();
1061 cifs_destroy_mids();
1062 out_destroy_inodecache
:
1063 cifs_destroy_inodecache();
1072 cFYI(DBG2
, ("exit_cifs"));
1074 #ifdef CONFIG_CIFS_DFS_UPCALL
1075 cifs_dfs_release_automount_timer();
1076 unregister_key_type(&key_type_dns_resolver
);
1078 #ifdef CONFIG_CIFS_UPCALL
1079 unregister_key_type(&cifs_spnego_key_type
);
1081 unregister_filesystem(&cifs_fs_type
);
1082 cifs_destroy_inodecache();
1083 cifs_destroy_mids();
1084 cifs_destroy_request_bufs();
1087 MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>");
1088 MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */
1090 ("VFS to access servers complying with the SNIA CIFS Specification "
1091 "e.g. Samba and Windows");
1092 MODULE_VERSION(CIFS_VERSION
);
1093 module_init(init_cifs
)
1094 module_exit(exit_cifs
)