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
->vfs_inode
.i_blkbits
= 14; /* 2**14 = CIFS_MAX_MSGSIZE */
316 cifs_inode
->server_eof
= 0;
318 /* Can not set i_flags here - they get immediately overwritten
319 to zero by the VFS */
320 /* cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME;*/
321 INIT_LIST_HEAD(&cifs_inode
->openFileList
);
322 return &cifs_inode
->vfs_inode
;
326 cifs_destroy_inode(struct inode
*inode
)
328 kmem_cache_free(cifs_inode_cachep
, CIFS_I(inode
));
332 cifs_show_address(struct seq_file
*s
, struct TCP_Server_Info
*server
)
334 seq_printf(s
, ",addr=");
336 switch (server
->addr
.sockAddr
.sin_family
) {
338 seq_printf(s
, "%pI4", &server
->addr
.sockAddr
.sin_addr
.s_addr
);
341 seq_printf(s
, "%pI6",
342 &server
->addr
.sockAddr6
.sin6_addr
.s6_addr
);
343 if (server
->addr
.sockAddr6
.sin6_scope_id
)
344 seq_printf(s
, "%%%u",
345 server
->addr
.sockAddr6
.sin6_scope_id
);
348 seq_printf(s
, "(unknown)");
353 * cifs_show_options() is for displaying mount options in /proc/mounts.
354 * Not all settable options are displayed but most of the important
358 cifs_show_options(struct seq_file
*s
, struct vfsmount
*m
)
360 struct cifs_sb_info
*cifs_sb
= CIFS_SB(m
->mnt_sb
);
361 struct cifsTconInfo
*tcon
= cifs_sb
->tcon
;
363 seq_printf(s
, ",unc=%s", tcon
->treeName
);
364 if (tcon
->ses
->userName
)
365 seq_printf(s
, ",username=%s", tcon
->ses
->userName
);
366 if (tcon
->ses
->domainName
)
367 seq_printf(s
, ",domain=%s", tcon
->ses
->domainName
);
369 seq_printf(s
, ",uid=%d", cifs_sb
->mnt_uid
);
370 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_OVERR_UID
)
371 seq_printf(s
, ",forceuid");
373 seq_printf(s
, ",noforceuid");
375 seq_printf(s
, ",gid=%d", cifs_sb
->mnt_gid
);
376 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_OVERR_GID
)
377 seq_printf(s
, ",forcegid");
379 seq_printf(s
, ",noforcegid");
381 cifs_show_address(s
, tcon
->ses
->server
);
384 seq_printf(s
, ",file_mode=0%o,dir_mode=0%o",
385 cifs_sb
->mnt_file_mode
,
386 cifs_sb
->mnt_dir_mode
);
388 seq_printf(s
, ",seal");
390 seq_printf(s
, ",nocase");
392 seq_printf(s
, ",hard");
393 if (cifs_sb
->prepath
)
394 seq_printf(s
, ",prepath=%s", cifs_sb
->prepath
);
395 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_POSIX_PATHS
)
396 seq_printf(s
, ",posixpaths");
397 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_SET_UID
)
398 seq_printf(s
, ",setuids");
399 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_SERVER_INUM
)
400 seq_printf(s
, ",serverino");
401 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_DIRECT_IO
)
402 seq_printf(s
, ",directio");
403 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_NO_XATTR
)
404 seq_printf(s
, ",nouser_xattr");
405 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_MAP_SPECIAL_CHR
)
406 seq_printf(s
, ",mapchars");
407 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_UNX_EMUL
)
408 seq_printf(s
, ",sfu");
409 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_NO_BRL
)
410 seq_printf(s
, ",nobrl");
411 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_CIFS_ACL
)
412 seq_printf(s
, ",cifsacl");
413 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_DYNPERM
)
414 seq_printf(s
, ",dynperm");
415 if (m
->mnt_sb
->s_flags
& MS_POSIXACL
)
416 seq_printf(s
, ",acl");
418 seq_printf(s
, ",rsize=%d", cifs_sb
->rsize
);
419 seq_printf(s
, ",wsize=%d", cifs_sb
->wsize
);
424 #ifdef CONFIG_CIFS_QUOTA
425 int cifs_xquota_set(struct super_block
*sb
, int quota_type
, qid_t qid
,
426 struct fs_disk_quota
*pdquota
)
430 struct cifs_sb_info
*cifs_sb
= CIFS_SB(sb
);
431 struct cifsTconInfo
*pTcon
;
434 pTcon
= cifs_sb
->tcon
;
441 cFYI(1, ("set type: 0x%x id: %d", quota_type
, qid
));
449 int cifs_xquota_get(struct super_block
*sb
, int quota_type
, qid_t qid
,
450 struct fs_disk_quota
*pdquota
)
454 struct cifs_sb_info
*cifs_sb
= CIFS_SB(sb
);
455 struct cifsTconInfo
*pTcon
;
458 pTcon
= cifs_sb
->tcon
;
464 cFYI(1, ("set type: 0x%x id: %d", quota_type
, qid
));
472 int cifs_xstate_set(struct super_block
*sb
, unsigned int flags
, int operation
)
476 struct cifs_sb_info
*cifs_sb
= CIFS_SB(sb
);
477 struct cifsTconInfo
*pTcon
;
480 pTcon
= cifs_sb
->tcon
;
486 cFYI(1, ("flags: 0x%x operation: 0x%x", flags
, operation
));
494 int cifs_xstate_get(struct super_block
*sb
, struct fs_quota_stat
*qstats
)
498 struct cifs_sb_info
*cifs_sb
= CIFS_SB(sb
);
499 struct cifsTconInfo
*pTcon
;
502 pTcon
= cifs_sb
->tcon
;
508 cFYI(1, ("pqstats %p", qstats
));
516 static const struct quotactl_ops cifs_quotactl_ops
= {
517 .set_xquota
= cifs_xquota_set
,
518 .get_xquota
= cifs_xquota_get
,
519 .set_xstate
= cifs_xstate_set
,
520 .get_xstate
= cifs_xstate_get
,
524 static void cifs_umount_begin(struct super_block
*sb
)
526 struct cifs_sb_info
*cifs_sb
= CIFS_SB(sb
);
527 struct cifsTconInfo
*tcon
;
532 tcon
= cifs_sb
->tcon
;
536 read_lock(&cifs_tcp_ses_lock
);
537 if ((tcon
->tc_count
> 1) || (tcon
->tidStatus
== CifsExiting
)) {
538 /* we have other mounts to same share or we have
539 already tried to force umount this and woken up
540 all waiting network requests, nothing to do */
541 read_unlock(&cifs_tcp_ses_lock
);
543 } else if (tcon
->tc_count
== 1)
544 tcon
->tidStatus
= CifsExiting
;
545 read_unlock(&cifs_tcp_ses_lock
);
547 /* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */
548 /* cancel_notify_requests(tcon); */
549 if (tcon
->ses
&& tcon
->ses
->server
) {
550 cFYI(1, ("wake up tasks now - umount begin not complete"));
551 wake_up_all(&tcon
->ses
->server
->request_q
);
552 wake_up_all(&tcon
->ses
->server
->response_q
);
553 msleep(1); /* yield */
554 /* we have to kick the requests once more */
555 wake_up_all(&tcon
->ses
->server
->response_q
);
562 #ifdef CONFIG_CIFS_STATS2
563 static int cifs_show_stats(struct seq_file
*s
, struct vfsmount
*mnt
)
570 static int cifs_remount(struct super_block
*sb
, int *flags
, char *data
)
572 *flags
|= MS_NODIRATIME
;
576 static const struct super_operations cifs_super_ops
= {
577 .put_super
= cifs_put_super
,
578 .statfs
= cifs_statfs
,
579 .alloc_inode
= cifs_alloc_inode
,
580 .destroy_inode
= cifs_destroy_inode
,
581 /* .drop_inode = generic_delete_inode,
582 .delete_inode = cifs_delete_inode, */ /* Do not need above two
583 functions unless later we add lazy close of inodes or unless the
584 kernel forgets to call us with the same number of releases (closes)
586 .show_options
= cifs_show_options
,
587 .umount_begin
= cifs_umount_begin
,
588 .remount_fs
= cifs_remount
,
589 #ifdef CONFIG_CIFS_STATS2
590 .show_stats
= cifs_show_stats
,
595 cifs_get_sb(struct file_system_type
*fs_type
,
596 int flags
, const char *dev_name
, void *data
, struct vfsmount
*mnt
)
599 struct super_block
*sb
= sget(fs_type
, NULL
, set_anon_super
, NULL
);
601 cFYI(1, ("Devname: %s flags: %d ", dev_name
, flags
));
608 rc
= cifs_read_super(sb
, data
, dev_name
, flags
& MS_SILENT
? 1 : 0);
610 deactivate_locked_super(sb
);
613 sb
->s_flags
|= MS_ACTIVE
;
614 simple_set_mnt(mnt
, sb
);
618 static ssize_t
cifs_file_aio_write(struct kiocb
*iocb
, const struct iovec
*iov
,
619 unsigned long nr_segs
, loff_t pos
)
621 struct inode
*inode
= iocb
->ki_filp
->f_path
.dentry
->d_inode
;
624 written
= generic_file_aio_write(iocb
, iov
, nr_segs
, pos
);
625 if (!CIFS_I(inode
)->clientCanCacheAll
)
626 filemap_fdatawrite(inode
->i_mapping
);
630 static loff_t
cifs_llseek(struct file
*file
, loff_t offset
, int origin
)
632 /* origin == SEEK_END => we must revalidate the cached file length */
633 if (origin
== SEEK_END
) {
636 /* some applications poll for the file length in this strange
637 way so we must seek to end on non-oplocked files by
638 setting the revalidate time to zero */
639 CIFS_I(file
->f_path
.dentry
->d_inode
)->time
= 0;
641 retval
= cifs_revalidate(file
->f_path
.dentry
);
643 return (loff_t
)retval
;
645 return generic_file_llseek_unlocked(file
, offset
, origin
);
648 #ifdef CONFIG_CIFS_EXPERIMENTAL
649 static int cifs_setlease(struct file
*file
, long arg
, struct file_lock
**lease
)
651 /* note that this is called by vfs setlease with the BKL held
652 although I doubt that BKL is needed here in cifs */
653 struct inode
*inode
= file
->f_path
.dentry
->d_inode
;
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 (CIFS_SB(inode
->i_sb
)->tcon
->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
);
679 struct file_system_type cifs_fs_type
= {
680 .owner
= THIS_MODULE
,
682 .get_sb
= cifs_get_sb
,
683 .kill_sb
= kill_anon_super
,
686 const struct inode_operations cifs_dir_inode_ops
= {
687 .create
= cifs_create
,
688 .lookup
= cifs_lookup
,
689 .getattr
= cifs_getattr
,
690 .unlink
= cifs_unlink
,
691 .link
= cifs_hardlink
,
694 .rename
= cifs_rename
,
695 .permission
= cifs_permission
,
696 /* revalidate:cifs_revalidate, */
697 .setattr
= cifs_setattr
,
698 .symlink
= cifs_symlink
,
700 #ifdef CONFIG_CIFS_XATTR
701 .setxattr
= cifs_setxattr
,
702 .getxattr
= cifs_getxattr
,
703 .listxattr
= cifs_listxattr
,
704 .removexattr
= cifs_removexattr
,
708 const struct inode_operations cifs_file_inode_ops
= {
709 /* revalidate:cifs_revalidate, */
710 .setattr
= cifs_setattr
,
711 .getattr
= cifs_getattr
, /* do we need this anymore? */
712 .rename
= cifs_rename
,
713 .permission
= cifs_permission
,
714 #ifdef CONFIG_CIFS_XATTR
715 .setxattr
= cifs_setxattr
,
716 .getxattr
= cifs_getxattr
,
717 .listxattr
= cifs_listxattr
,
718 .removexattr
= cifs_removexattr
,
722 const struct inode_operations cifs_symlink_inode_ops
= {
723 .readlink
= generic_readlink
,
724 .follow_link
= cifs_follow_link
,
725 .put_link
= cifs_put_link
,
726 .permission
= cifs_permission
,
727 /* BB add the following two eventually */
728 /* revalidate: cifs_revalidate,
729 setattr: cifs_notify_change, *//* BB do we need notify change */
730 #ifdef CONFIG_CIFS_XATTR
731 .setxattr
= cifs_setxattr
,
732 .getxattr
= cifs_getxattr
,
733 .listxattr
= cifs_listxattr
,
734 .removexattr
= cifs_removexattr
,
738 const struct file_operations cifs_file_ops
= {
739 .read
= do_sync_read
,
740 .write
= do_sync_write
,
741 .aio_read
= generic_file_aio_read
,
742 .aio_write
= cifs_file_aio_write
,
744 .release
= cifs_close
,
748 .mmap
= cifs_file_mmap
,
749 .splice_read
= generic_file_splice_read
,
750 .llseek
= cifs_llseek
,
751 #ifdef CONFIG_CIFS_POSIX
752 .unlocked_ioctl
= cifs_ioctl
,
753 #endif /* CONFIG_CIFS_POSIX */
755 #ifdef CONFIG_CIFS_EXPERIMENTAL
756 .setlease
= cifs_setlease
,
757 #endif /* CONFIG_CIFS_EXPERIMENTAL */
760 const struct file_operations cifs_file_direct_ops
= {
761 /* no aio, no readv -
762 BB reevaluate whether they can be done with directio, no cache */
763 .read
= cifs_user_read
,
764 .write
= cifs_user_write
,
766 .release
= cifs_close
,
770 .mmap
= cifs_file_mmap
,
771 .splice_read
= generic_file_splice_read
,
772 #ifdef CONFIG_CIFS_POSIX
773 .unlocked_ioctl
= cifs_ioctl
,
774 #endif /* CONFIG_CIFS_POSIX */
775 .llseek
= cifs_llseek
,
776 #ifdef CONFIG_CIFS_EXPERIMENTAL
777 .setlease
= cifs_setlease
,
778 #endif /* CONFIG_CIFS_EXPERIMENTAL */
780 const struct file_operations cifs_file_nobrl_ops
= {
781 .read
= do_sync_read
,
782 .write
= do_sync_write
,
783 .aio_read
= generic_file_aio_read
,
784 .aio_write
= cifs_file_aio_write
,
786 .release
= cifs_close
,
789 .mmap
= cifs_file_mmap
,
790 .splice_read
= generic_file_splice_read
,
791 .llseek
= cifs_llseek
,
792 #ifdef CONFIG_CIFS_POSIX
793 .unlocked_ioctl
= cifs_ioctl
,
794 #endif /* CONFIG_CIFS_POSIX */
796 #ifdef CONFIG_CIFS_EXPERIMENTAL
797 .setlease
= cifs_setlease
,
798 #endif /* CONFIG_CIFS_EXPERIMENTAL */
801 const struct file_operations cifs_file_direct_nobrl_ops
= {
802 /* no mmap, no aio, no readv -
803 BB reevaluate whether they can be done with directio, no cache */
804 .read
= cifs_user_read
,
805 .write
= cifs_user_write
,
807 .release
= cifs_close
,
810 .splice_read
= generic_file_splice_read
,
811 #ifdef CONFIG_CIFS_POSIX
812 .unlocked_ioctl
= cifs_ioctl
,
813 #endif /* CONFIG_CIFS_POSIX */
814 .llseek
= cifs_llseek
,
815 #ifdef CONFIG_CIFS_EXPERIMENTAL
816 .setlease
= cifs_setlease
,
817 #endif /* CONFIG_CIFS_EXPERIMENTAL */
820 const struct file_operations cifs_dir_ops
= {
821 .readdir
= cifs_readdir
,
822 .release
= cifs_closedir
,
823 .read
= generic_read_dir
,
824 .unlocked_ioctl
= cifs_ioctl
,
825 .llseek
= generic_file_llseek
,
829 cifs_init_once(void *inode
)
831 struct cifsInodeInfo
*cifsi
= inode
;
833 inode_init_once(&cifsi
->vfs_inode
);
834 INIT_LIST_HEAD(&cifsi
->lockList
);
838 cifs_init_inodecache(void)
840 cifs_inode_cachep
= kmem_cache_create("cifs_inode_cache",
841 sizeof(struct cifsInodeInfo
),
842 0, (SLAB_RECLAIM_ACCOUNT
|
845 if (cifs_inode_cachep
== NULL
)
852 cifs_destroy_inodecache(void)
854 kmem_cache_destroy(cifs_inode_cachep
);
858 cifs_init_request_bufs(void)
860 if (CIFSMaxBufSize
< 8192) {
861 /* Buffer size can not be smaller than 2 * PATH_MAX since maximum
862 Unicode path name has to fit in any SMB/CIFS path based frames */
863 CIFSMaxBufSize
= 8192;
864 } else if (CIFSMaxBufSize
> 1024*127) {
865 CIFSMaxBufSize
= 1024 * 127;
867 CIFSMaxBufSize
&= 0x1FE00; /* Round size to even 512 byte mult*/
869 /* cERROR(1,("CIFSMaxBufSize %d 0x%x",CIFSMaxBufSize,CIFSMaxBufSize)); */
870 cifs_req_cachep
= kmem_cache_create("cifs_request",
872 MAX_CIFS_HDR_SIZE
, 0,
873 SLAB_HWCACHE_ALIGN
, NULL
);
874 if (cifs_req_cachep
== NULL
)
877 if (cifs_min_rcv
< 1)
879 else if (cifs_min_rcv
> 64) {
881 cERROR(1, ("cifs_min_rcv set to maximum (64)"));
884 cifs_req_poolp
= mempool_create_slab_pool(cifs_min_rcv
,
887 if (cifs_req_poolp
== NULL
) {
888 kmem_cache_destroy(cifs_req_cachep
);
891 /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and
892 almost all handle based requests (but not write response, nor is it
893 sufficient for path based requests). A smaller size would have
894 been more efficient (compacting multiple slab items on one 4k page)
895 for the case in which debug was on, but this larger size allows
896 more SMBs to use small buffer alloc and is still much more
897 efficient to alloc 1 per page off the slab compared to 17K (5page)
898 alloc of large cifs buffers even when page debugging is on */
899 cifs_sm_req_cachep
= kmem_cache_create("cifs_small_rq",
900 MAX_CIFS_SMALL_BUFFER_SIZE
, 0, SLAB_HWCACHE_ALIGN
,
902 if (cifs_sm_req_cachep
== NULL
) {
903 mempool_destroy(cifs_req_poolp
);
904 kmem_cache_destroy(cifs_req_cachep
);
908 if (cifs_min_small
< 2)
910 else if (cifs_min_small
> 256) {
911 cifs_min_small
= 256;
912 cFYI(1, ("cifs_min_small set to maximum (256)"));
915 cifs_sm_req_poolp
= mempool_create_slab_pool(cifs_min_small
,
918 if (cifs_sm_req_poolp
== NULL
) {
919 mempool_destroy(cifs_req_poolp
);
920 kmem_cache_destroy(cifs_req_cachep
);
921 kmem_cache_destroy(cifs_sm_req_cachep
);
929 cifs_destroy_request_bufs(void)
931 mempool_destroy(cifs_req_poolp
);
932 kmem_cache_destroy(cifs_req_cachep
);
933 mempool_destroy(cifs_sm_req_poolp
);
934 kmem_cache_destroy(cifs_sm_req_cachep
);
940 cifs_mid_cachep
= kmem_cache_create("cifs_mpx_ids",
941 sizeof(struct mid_q_entry
), 0,
942 SLAB_HWCACHE_ALIGN
, NULL
);
943 if (cifs_mid_cachep
== NULL
)
946 /* 3 is a reasonable minimum number of simultaneous operations */
947 cifs_mid_poolp
= mempool_create_slab_pool(3, cifs_mid_cachep
);
948 if (cifs_mid_poolp
== NULL
) {
949 kmem_cache_destroy(cifs_mid_cachep
);
953 cifs_oplock_cachep
= kmem_cache_create("cifs_oplock_structs",
954 sizeof(struct oplock_q_entry
), 0,
955 SLAB_HWCACHE_ALIGN
, NULL
);
956 if (cifs_oplock_cachep
== NULL
) {
957 mempool_destroy(cifs_mid_poolp
);
958 kmem_cache_destroy(cifs_mid_cachep
);
966 cifs_destroy_mids(void)
968 mempool_destroy(cifs_mid_poolp
);
969 kmem_cache_destroy(cifs_mid_cachep
);
970 kmem_cache_destroy(cifs_oplock_cachep
);
978 INIT_LIST_HEAD(&cifs_tcp_ses_list
);
979 #ifdef CONFIG_CIFS_EXPERIMENTAL
980 INIT_LIST_HEAD(&GlobalDnotifyReqList
);
981 INIT_LIST_HEAD(&GlobalDnotifyRsp_Q
);
984 * Initialize Global counters
986 atomic_set(&sesInfoAllocCount
, 0);
987 atomic_set(&tconInfoAllocCount
, 0);
988 atomic_set(&tcpSesAllocCount
, 0);
989 atomic_set(&tcpSesReconnectCount
, 0);
990 atomic_set(&tconInfoReconnectCount
, 0);
992 atomic_set(&bufAllocCount
, 0);
993 atomic_set(&smBufAllocCount
, 0);
994 #ifdef CONFIG_CIFS_STATS2
995 atomic_set(&totBufAllocCount
, 0);
996 atomic_set(&totSmBufAllocCount
, 0);
997 #endif /* CONFIG_CIFS_STATS2 */
999 atomic_set(&midCount
, 0);
1000 GlobalCurrentXid
= 0;
1001 GlobalTotalActiveXid
= 0;
1002 GlobalMaxActiveXid
= 0;
1003 memset(Local_System_Name
, 0, 15);
1004 rwlock_init(&GlobalSMBSeslock
);
1005 rwlock_init(&cifs_tcp_ses_lock
);
1006 spin_lock_init(&GlobalMid_Lock
);
1008 if (cifs_max_pending
< 2) {
1009 cifs_max_pending
= 2;
1010 cFYI(1, ("cifs_max_pending set to min of 2"));
1011 } else if (cifs_max_pending
> 256) {
1012 cifs_max_pending
= 256;
1013 cFYI(1, ("cifs_max_pending set to max of 256"));
1016 rc
= cifs_init_inodecache();
1018 goto out_clean_proc
;
1020 rc
= cifs_init_mids();
1022 goto out_destroy_inodecache
;
1024 rc
= cifs_init_request_bufs();
1026 goto out_destroy_mids
;
1028 rc
= register_filesystem(&cifs_fs_type
);
1030 goto out_destroy_request_bufs
;
1031 #ifdef CONFIG_CIFS_UPCALL
1032 rc
= register_key_type(&cifs_spnego_key_type
);
1034 goto out_unregister_filesystem
;
1036 #ifdef CONFIG_CIFS_DFS_UPCALL
1037 rc
= register_key_type(&key_type_dns_resolver
);
1039 goto out_unregister_key_type
;
1041 rc
= slow_work_register_user(THIS_MODULE
);
1043 goto out_unregister_resolver_key
;
1047 out_unregister_resolver_key
:
1048 #ifdef CONFIG_CIFS_DFS_UPCALL
1049 unregister_key_type(&key_type_dns_resolver
);
1050 out_unregister_key_type
:
1052 #ifdef CONFIG_CIFS_UPCALL
1053 unregister_key_type(&cifs_spnego_key_type
);
1054 out_unregister_filesystem
:
1056 unregister_filesystem(&cifs_fs_type
);
1057 out_destroy_request_bufs
:
1058 cifs_destroy_request_bufs();
1060 cifs_destroy_mids();
1061 out_destroy_inodecache
:
1062 cifs_destroy_inodecache();
1071 cFYI(DBG2
, ("exit_cifs"));
1073 #ifdef CONFIG_CIFS_DFS_UPCALL
1074 cifs_dfs_release_automount_timer();
1075 unregister_key_type(&key_type_dns_resolver
);
1077 #ifdef CONFIG_CIFS_UPCALL
1078 unregister_key_type(&cifs_spnego_key_type
);
1080 unregister_filesystem(&cifs_fs_type
);
1081 cifs_destroy_inodecache();
1082 cifs_destroy_mids();
1083 cifs_destroy_request_bufs();
1086 MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>");
1087 MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */
1089 ("VFS to access servers complying with the SNIA CIFS Specification "
1090 "e.g. Samba and Windows");
1091 MODULE_VERSION(CIFS_VERSION
);
1092 module_init(init_cifs
)
1093 module_exit(exit_cifs
)