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"
51 #define CIFS_MAGIC_NUMBER 0xFF534D42 /* the first four bytes of SMB PDUs */
56 unsigned int oplockEnabled
= 1;
57 unsigned int experimEnabled
= 0;
58 unsigned int linuxExtEnabled
= 1;
59 unsigned int lookupCacheEnabled
= 1;
60 unsigned int multiuser_mount
= 0;
61 unsigned int global_secflags
= CIFSSEC_DEF
;
62 /* unsigned int ntlmv2_support = 0; */
63 unsigned int sign_CIFS_PDUs
= 1;
64 static const struct super_operations cifs_super_ops
;
65 unsigned int CIFSMaxBufSize
= CIFS_MAX_MSGSIZE
;
66 module_param(CIFSMaxBufSize
, int, 0);
67 MODULE_PARM_DESC(CIFSMaxBufSize
, "Network buffer size (not including header). "
68 "Default: 16384 Range: 8192 to 130048");
69 unsigned int cifs_min_rcv
= CIFS_MIN_RCV_POOL
;
70 module_param(cifs_min_rcv
, int, 0);
71 MODULE_PARM_DESC(cifs_min_rcv
, "Network buffers in pool. Default: 4 Range: "
73 unsigned int cifs_min_small
= 30;
74 module_param(cifs_min_small
, int, 0);
75 MODULE_PARM_DESC(cifs_min_small
, "Small network buffers in pool. Default: 30 "
77 unsigned int cifs_max_pending
= CIFS_MAX_REQ
;
78 module_param(cifs_max_pending
, int, 0);
79 MODULE_PARM_DESC(cifs_max_pending
, "Simultaneous requests to server. "
80 "Default: 50 Range: 2 to 256");
82 extern mempool_t
*cifs_sm_req_poolp
;
83 extern mempool_t
*cifs_req_poolp
;
84 extern mempool_t
*cifs_mid_poolp
;
87 cifs_read_super(struct super_block
*sb
, void *data
,
88 const char *devname
, int silent
)
91 struct cifs_sb_info
*cifs_sb
;
94 /* BB should we make this contingent on mount parm? */
95 sb
->s_flags
|= MS_NODIRATIME
| MS_NOATIME
;
96 sb
->s_fs_info
= kzalloc(sizeof(struct cifs_sb_info
), GFP_KERNEL
);
97 cifs_sb
= CIFS_SB(sb
);
101 rc
= bdi_setup_and_register(&cifs_sb
->bdi
, "cifs", BDI_CAP_MAP_COPY
);
107 #ifdef CONFIG_CIFS_DFS_UPCALL
108 /* copy mount params to sb for use in submounts */
109 /* BB: should we move this after the mount so we
110 * do not have to do the copy on failed mounts?
111 * BB: May be it is better to do simple copy before
112 * complex operation (mount), and in case of fail
113 * just exit instead of doing mount and attempting
114 * undo it if this copy fails?*/
116 int len
= strlen(data
);
117 cifs_sb
->mountdata
= kzalloc(len
+ 1, GFP_KERNEL
);
118 if (cifs_sb
->mountdata
== NULL
) {
119 bdi_destroy(&cifs_sb
->bdi
);
120 kfree(sb
->s_fs_info
);
121 sb
->s_fs_info
= NULL
;
124 strncpy(cifs_sb
->mountdata
, data
, len
+ 1);
125 cifs_sb
->mountdata
[len
] = '\0';
129 rc
= cifs_mount(sb
, cifs_sb
, data
, devname
);
133 cERROR(1, "cifs_mount failed w/return code = %d", rc
);
134 goto out_mount_failed
;
137 sb
->s_magic
= CIFS_MAGIC_NUMBER
;
138 sb
->s_op
= &cifs_super_ops
;
139 sb
->s_bdi
= &cifs_sb
->bdi
;
140 /* if (cifs_sb->tcon->ses->server->maxBuf > MAX_CIFS_HDR_SIZE + 512)
142 cifs_sb->tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE; */
143 sb
->s_blocksize
= CIFS_MAX_MSGSIZE
;
144 sb
->s_blocksize_bits
= 14; /* default 2**14 = CIFS_MAX_MSGSIZE */
145 inode
= cifs_root_iget(sb
, ROOT_I
);
153 sb
->s_root
= d_alloc_root(inode
);
160 #ifdef CONFIG_CIFS_EXPERIMENTAL
161 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_SERVER_INUM
) {
162 cFYI(1, "export ops supported");
163 sb
->s_export_op
= &cifs_export_ops
;
165 #endif /* EXPERIMENTAL */
170 cERROR(1, "cifs_read_super: get root inode failed");
174 cifs_umount(sb
, cifs_sb
);
178 #ifdef CONFIG_CIFS_DFS_UPCALL
179 if (cifs_sb
->mountdata
) {
180 kfree(cifs_sb
->mountdata
);
181 cifs_sb
->mountdata
= NULL
;
184 unload_nls(cifs_sb
->local_nls
);
185 bdi_destroy(&cifs_sb
->bdi
);
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
);
217 bdi_destroy(&cifs_sb
->bdi
);
224 cifs_statfs(struct dentry
*dentry
, struct kstatfs
*buf
)
226 struct super_block
*sb
= dentry
->d_sb
;
227 struct cifs_sb_info
*cifs_sb
= CIFS_SB(sb
);
228 struct cifsTconInfo
*tcon
= cifs_sb
->tcon
;
229 int rc
= -EOPNOTSUPP
;
234 buf
->f_type
= CIFS_MAGIC_NUMBER
;
237 * PATH_MAX may be too long - it would presumably be total path,
238 * but note that some servers (includinng Samba 3) have a shorter
241 * Instead could get the real value via SMB_QUERY_FS_ATTRIBUTE_INFO.
243 buf
->f_namelen
= PATH_MAX
;
244 buf
->f_files
= 0; /* undefined */
245 buf
->f_ffree
= 0; /* unlimited */
248 * We could add a second check for a QFS Unix capability bit
250 if ((tcon
->ses
->capabilities
& CAP_UNIX
) &&
251 (CIFS_POSIX_EXTENSIONS
& le64_to_cpu(tcon
->fsUnixInfo
.Capability
)))
252 rc
= CIFSSMBQFSPosixInfo(xid
, tcon
, buf
);
255 * Only need to call the old QFSInfo if failed on newer one,
258 if (rc
&& (tcon
->ses
->capabilities
& CAP_NT_SMBS
))
259 rc
= CIFSSMBQFSInfo(xid
, tcon
, buf
);
262 * Some old Windows servers also do not support level 103, retry with
263 * older level one if old server failed the previous call or we
264 * bypassed it because we detected that this was an older LANMAN sess
267 rc
= SMBOldQFSInfo(xid
, tcon
, buf
);
273 static int cifs_permission(struct inode
*inode
, int mask
)
275 struct cifs_sb_info
*cifs_sb
;
277 cifs_sb
= CIFS_SB(inode
->i_sb
);
279 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_NO_PERM
) {
280 if ((mask
& MAY_EXEC
) && !execute_ok(inode
))
284 } else /* file mode might have been restricted at mount time
285 on the client (above and beyond ACL on servers) for
286 servers which do not support setting and viewing mode bits,
287 so allowing client to check permissions is useful */
288 return generic_permission(inode
, mask
, NULL
);
291 static struct kmem_cache
*cifs_inode_cachep
;
292 static struct kmem_cache
*cifs_req_cachep
;
293 static struct kmem_cache
*cifs_mid_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 static void cifs_umount_begin(struct super_block
*sb
)
427 struct cifs_sb_info
*cifs_sb
= CIFS_SB(sb
);
428 struct cifsTconInfo
*tcon
;
433 tcon
= cifs_sb
->tcon
;
437 read_lock(&cifs_tcp_ses_lock
);
438 if ((tcon
->tc_count
> 1) || (tcon
->tidStatus
== CifsExiting
)) {
439 /* we have other mounts to same share or we have
440 already tried to force umount this and woken up
441 all waiting network requests, nothing to do */
442 read_unlock(&cifs_tcp_ses_lock
);
444 } else if (tcon
->tc_count
== 1)
445 tcon
->tidStatus
= CifsExiting
;
446 read_unlock(&cifs_tcp_ses_lock
);
448 /* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */
449 /* cancel_notify_requests(tcon); */
450 if (tcon
->ses
&& tcon
->ses
->server
) {
451 cFYI(1, "wake up tasks now - umount begin not complete");
452 wake_up_all(&tcon
->ses
->server
->request_q
);
453 wake_up_all(&tcon
->ses
->server
->response_q
);
454 msleep(1); /* yield */
455 /* we have to kick the requests once more */
456 wake_up_all(&tcon
->ses
->server
->response_q
);
463 #ifdef CONFIG_CIFS_STATS2
464 static int cifs_show_stats(struct seq_file
*s
, struct vfsmount
*mnt
)
471 static int cifs_remount(struct super_block
*sb
, int *flags
, char *data
)
473 *flags
|= MS_NODIRATIME
;
477 void cifs_drop_inode(struct inode
*inode
)
479 struct cifs_sb_info
*cifs_sb
= CIFS_SB(inode
->i_sb
);
481 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_SERVER_INUM
)
482 return generic_drop_inode(inode
);
484 return generic_delete_inode(inode
);
487 static const struct super_operations cifs_super_ops
= {
488 .put_super
= cifs_put_super
,
489 .statfs
= cifs_statfs
,
490 .alloc_inode
= cifs_alloc_inode
,
491 .destroy_inode
= cifs_destroy_inode
,
492 .drop_inode
= cifs_drop_inode
,
493 /* .delete_inode = cifs_delete_inode, */ /* Do not need above
494 function unless later we add lazy close of inodes or unless the
495 kernel forgets to call us with the same number of releases (closes)
497 .show_options
= cifs_show_options
,
498 .umount_begin
= cifs_umount_begin
,
499 .remount_fs
= cifs_remount
,
500 #ifdef CONFIG_CIFS_STATS2
501 .show_stats
= cifs_show_stats
,
506 cifs_get_sb(struct file_system_type
*fs_type
,
507 int flags
, const char *dev_name
, void *data
, struct vfsmount
*mnt
)
510 struct super_block
*sb
= sget(fs_type
, NULL
, set_anon_super
, NULL
);
512 cFYI(1, "Devname: %s flags: %d ", dev_name
, flags
);
519 rc
= cifs_read_super(sb
, data
, dev_name
, flags
& MS_SILENT
? 1 : 0);
521 deactivate_locked_super(sb
);
524 sb
->s_flags
|= MS_ACTIVE
;
525 simple_set_mnt(mnt
, sb
);
529 static ssize_t
cifs_file_aio_write(struct kiocb
*iocb
, const struct iovec
*iov
,
530 unsigned long nr_segs
, loff_t pos
)
532 struct inode
*inode
= iocb
->ki_filp
->f_path
.dentry
->d_inode
;
535 written
= generic_file_aio_write(iocb
, iov
, nr_segs
, pos
);
536 if (!CIFS_I(inode
)->clientCanCacheAll
)
537 filemap_fdatawrite(inode
->i_mapping
);
541 static loff_t
cifs_llseek(struct file
*file
, loff_t offset
, int origin
)
543 /* origin == SEEK_END => we must revalidate the cached file length */
544 if (origin
== SEEK_END
) {
547 /* some applications poll for the file length in this strange
548 way so we must seek to end on non-oplocked files by
549 setting the revalidate time to zero */
550 CIFS_I(file
->f_path
.dentry
->d_inode
)->time
= 0;
552 retval
= cifs_revalidate_file(file
);
554 return (loff_t
)retval
;
556 return generic_file_llseek_unlocked(file
, offset
, origin
);
559 static int cifs_setlease(struct file
*file
, long arg
, struct file_lock
**lease
)
561 /* note that this is called by vfs setlease with the BKL held
562 although I doubt that BKL is needed here in cifs */
563 struct inode
*inode
= file
->f_path
.dentry
->d_inode
;
565 if (!(S_ISREG(inode
->i_mode
)))
568 /* check if file is oplocked */
569 if (((arg
== F_RDLCK
) &&
570 (CIFS_I(inode
)->clientCanCacheRead
)) ||
572 (CIFS_I(inode
)->clientCanCacheAll
)))
573 return generic_setlease(file
, arg
, lease
);
574 else if (CIFS_SB(inode
->i_sb
)->tcon
->local_lease
&&
575 !CIFS_I(inode
)->clientCanCacheRead
)
576 /* If the server claims to support oplock on this
577 file, then we still need to check oplock even
578 if the local_lease mount option is set, but there
579 are servers which do not support oplock for which
580 this mount option may be useful if the user
581 knows that the file won't be changed on the server
583 return generic_setlease(file
, arg
, lease
);
588 struct file_system_type cifs_fs_type
= {
589 .owner
= THIS_MODULE
,
591 .get_sb
= cifs_get_sb
,
592 .kill_sb
= kill_anon_super
,
595 const struct inode_operations cifs_dir_inode_ops
= {
596 .create
= cifs_create
,
597 .lookup
= cifs_lookup
,
598 .getattr
= cifs_getattr
,
599 .unlink
= cifs_unlink
,
600 .link
= cifs_hardlink
,
603 .rename
= cifs_rename
,
604 .permission
= cifs_permission
,
605 /* revalidate:cifs_revalidate, */
606 .setattr
= cifs_setattr
,
607 .symlink
= cifs_symlink
,
609 #ifdef CONFIG_CIFS_XATTR
610 .setxattr
= cifs_setxattr
,
611 .getxattr
= cifs_getxattr
,
612 .listxattr
= cifs_listxattr
,
613 .removexattr
= cifs_removexattr
,
617 const struct inode_operations cifs_file_inode_ops
= {
618 /* revalidate:cifs_revalidate, */
619 .setattr
= cifs_setattr
,
620 .getattr
= cifs_getattr
, /* do we need this anymore? */
621 .rename
= cifs_rename
,
622 .permission
= cifs_permission
,
623 #ifdef CONFIG_CIFS_XATTR
624 .setxattr
= cifs_setxattr
,
625 .getxattr
= cifs_getxattr
,
626 .listxattr
= cifs_listxattr
,
627 .removexattr
= cifs_removexattr
,
631 const struct inode_operations cifs_symlink_inode_ops
= {
632 .readlink
= generic_readlink
,
633 .follow_link
= cifs_follow_link
,
634 .put_link
= cifs_put_link
,
635 .permission
= cifs_permission
,
636 /* BB add the following two eventually */
637 /* revalidate: cifs_revalidate,
638 setattr: cifs_notify_change, *//* BB do we need notify change */
639 #ifdef CONFIG_CIFS_XATTR
640 .setxattr
= cifs_setxattr
,
641 .getxattr
= cifs_getxattr
,
642 .listxattr
= cifs_listxattr
,
643 .removexattr
= cifs_removexattr
,
647 const struct file_operations cifs_file_ops
= {
648 .read
= do_sync_read
,
649 .write
= do_sync_write
,
650 .aio_read
= generic_file_aio_read
,
651 .aio_write
= cifs_file_aio_write
,
653 .release
= cifs_close
,
657 .mmap
= cifs_file_mmap
,
658 .splice_read
= generic_file_splice_read
,
659 .llseek
= cifs_llseek
,
660 #ifdef CONFIG_CIFS_POSIX
661 .unlocked_ioctl
= cifs_ioctl
,
662 #endif /* CONFIG_CIFS_POSIX */
663 .setlease
= cifs_setlease
,
666 const struct file_operations cifs_file_direct_ops
= {
667 /* no aio, no readv -
668 BB reevaluate whether they can be done with directio, no cache */
669 .read
= cifs_user_read
,
670 .write
= cifs_user_write
,
672 .release
= cifs_close
,
676 .mmap
= cifs_file_mmap
,
677 .splice_read
= generic_file_splice_read
,
678 #ifdef CONFIG_CIFS_POSIX
679 .unlocked_ioctl
= cifs_ioctl
,
680 #endif /* CONFIG_CIFS_POSIX */
681 .llseek
= cifs_llseek
,
682 .setlease
= cifs_setlease
,
684 const struct file_operations cifs_file_nobrl_ops
= {
685 .read
= do_sync_read
,
686 .write
= do_sync_write
,
687 .aio_read
= generic_file_aio_read
,
688 .aio_write
= cifs_file_aio_write
,
690 .release
= cifs_close
,
693 .mmap
= cifs_file_mmap
,
694 .splice_read
= generic_file_splice_read
,
695 .llseek
= cifs_llseek
,
696 #ifdef CONFIG_CIFS_POSIX
697 .unlocked_ioctl
= cifs_ioctl
,
698 #endif /* CONFIG_CIFS_POSIX */
699 .setlease
= cifs_setlease
,
702 const struct file_operations cifs_file_direct_nobrl_ops
= {
703 /* no mmap, no aio, no readv -
704 BB reevaluate whether they can be done with directio, no cache */
705 .read
= cifs_user_read
,
706 .write
= cifs_user_write
,
708 .release
= cifs_close
,
711 .mmap
= cifs_file_mmap
,
712 .splice_read
= generic_file_splice_read
,
713 #ifdef CONFIG_CIFS_POSIX
714 .unlocked_ioctl
= cifs_ioctl
,
715 #endif /* CONFIG_CIFS_POSIX */
716 .llseek
= cifs_llseek
,
717 .setlease
= cifs_setlease
,
720 const struct file_operations cifs_dir_ops
= {
721 .readdir
= cifs_readdir
,
722 .release
= cifs_closedir
,
723 .read
= generic_read_dir
,
724 .unlocked_ioctl
= cifs_ioctl
,
725 .llseek
= generic_file_llseek
,
729 cifs_init_once(void *inode
)
731 struct cifsInodeInfo
*cifsi
= inode
;
733 inode_init_once(&cifsi
->vfs_inode
);
734 INIT_LIST_HEAD(&cifsi
->lockList
);
738 cifs_init_inodecache(void)
740 cifs_inode_cachep
= kmem_cache_create("cifs_inode_cache",
741 sizeof(struct cifsInodeInfo
),
742 0, (SLAB_RECLAIM_ACCOUNT
|
745 if (cifs_inode_cachep
== NULL
)
752 cifs_destroy_inodecache(void)
754 kmem_cache_destroy(cifs_inode_cachep
);
758 cifs_init_request_bufs(void)
760 if (CIFSMaxBufSize
< 8192) {
761 /* Buffer size can not be smaller than 2 * PATH_MAX since maximum
762 Unicode path name has to fit in any SMB/CIFS path based frames */
763 CIFSMaxBufSize
= 8192;
764 } else if (CIFSMaxBufSize
> 1024*127) {
765 CIFSMaxBufSize
= 1024 * 127;
767 CIFSMaxBufSize
&= 0x1FE00; /* Round size to even 512 byte mult*/
769 /* cERROR(1, "CIFSMaxBufSize %d 0x%x",CIFSMaxBufSize,CIFSMaxBufSize); */
770 cifs_req_cachep
= kmem_cache_create("cifs_request",
772 MAX_CIFS_HDR_SIZE
, 0,
773 SLAB_HWCACHE_ALIGN
, NULL
);
774 if (cifs_req_cachep
== NULL
)
777 if (cifs_min_rcv
< 1)
779 else if (cifs_min_rcv
> 64) {
781 cERROR(1, "cifs_min_rcv set to maximum (64)");
784 cifs_req_poolp
= mempool_create_slab_pool(cifs_min_rcv
,
787 if (cifs_req_poolp
== NULL
) {
788 kmem_cache_destroy(cifs_req_cachep
);
791 /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and
792 almost all handle based requests (but not write response, nor is it
793 sufficient for path based requests). A smaller size would have
794 been more efficient (compacting multiple slab items on one 4k page)
795 for the case in which debug was on, but this larger size allows
796 more SMBs to use small buffer alloc and is still much more
797 efficient to alloc 1 per page off the slab compared to 17K (5page)
798 alloc of large cifs buffers even when page debugging is on */
799 cifs_sm_req_cachep
= kmem_cache_create("cifs_small_rq",
800 MAX_CIFS_SMALL_BUFFER_SIZE
, 0, SLAB_HWCACHE_ALIGN
,
802 if (cifs_sm_req_cachep
== NULL
) {
803 mempool_destroy(cifs_req_poolp
);
804 kmem_cache_destroy(cifs_req_cachep
);
808 if (cifs_min_small
< 2)
810 else if (cifs_min_small
> 256) {
811 cifs_min_small
= 256;
812 cFYI(1, "cifs_min_small set to maximum (256)");
815 cifs_sm_req_poolp
= mempool_create_slab_pool(cifs_min_small
,
818 if (cifs_sm_req_poolp
== NULL
) {
819 mempool_destroy(cifs_req_poolp
);
820 kmem_cache_destroy(cifs_req_cachep
);
821 kmem_cache_destroy(cifs_sm_req_cachep
);
829 cifs_destroy_request_bufs(void)
831 mempool_destroy(cifs_req_poolp
);
832 kmem_cache_destroy(cifs_req_cachep
);
833 mempool_destroy(cifs_sm_req_poolp
);
834 kmem_cache_destroy(cifs_sm_req_cachep
);
840 cifs_mid_cachep
= kmem_cache_create("cifs_mpx_ids",
841 sizeof(struct mid_q_entry
), 0,
842 SLAB_HWCACHE_ALIGN
, NULL
);
843 if (cifs_mid_cachep
== NULL
)
846 /* 3 is a reasonable minimum number of simultaneous operations */
847 cifs_mid_poolp
= mempool_create_slab_pool(3, cifs_mid_cachep
);
848 if (cifs_mid_poolp
== NULL
) {
849 kmem_cache_destroy(cifs_mid_cachep
);
857 cifs_destroy_mids(void)
859 mempool_destroy(cifs_mid_poolp
);
860 kmem_cache_destroy(cifs_mid_cachep
);
868 INIT_LIST_HEAD(&cifs_tcp_ses_list
);
869 #ifdef CONFIG_CIFS_EXPERIMENTAL
870 INIT_LIST_HEAD(&GlobalDnotifyReqList
);
871 INIT_LIST_HEAD(&GlobalDnotifyRsp_Q
);
874 * Initialize Global counters
876 atomic_set(&sesInfoAllocCount
, 0);
877 atomic_set(&tconInfoAllocCount
, 0);
878 atomic_set(&tcpSesAllocCount
, 0);
879 atomic_set(&tcpSesReconnectCount
, 0);
880 atomic_set(&tconInfoReconnectCount
, 0);
882 atomic_set(&bufAllocCount
, 0);
883 atomic_set(&smBufAllocCount
, 0);
884 #ifdef CONFIG_CIFS_STATS2
885 atomic_set(&totBufAllocCount
, 0);
886 atomic_set(&totSmBufAllocCount
, 0);
887 #endif /* CONFIG_CIFS_STATS2 */
889 atomic_set(&midCount
, 0);
890 GlobalCurrentXid
= 0;
891 GlobalTotalActiveXid
= 0;
892 GlobalMaxActiveXid
= 0;
893 memset(Local_System_Name
, 0, 15);
894 rwlock_init(&GlobalSMBSeslock
);
895 rwlock_init(&cifs_tcp_ses_lock
);
896 spin_lock_init(&GlobalMid_Lock
);
898 if (cifs_max_pending
< 2) {
899 cifs_max_pending
= 2;
900 cFYI(1, "cifs_max_pending set to min of 2");
901 } else if (cifs_max_pending
> 256) {
902 cifs_max_pending
= 256;
903 cFYI(1, "cifs_max_pending set to max of 256");
906 rc
= cifs_fscache_register();
910 rc
= cifs_init_inodecache();
914 rc
= cifs_init_mids();
916 goto out_destroy_inodecache
;
918 rc
= cifs_init_request_bufs();
920 goto out_destroy_mids
;
922 rc
= register_filesystem(&cifs_fs_type
);
924 goto out_destroy_request_bufs
;
925 #ifdef CONFIG_CIFS_UPCALL
926 rc
= register_key_type(&cifs_spnego_key_type
);
928 goto out_unregister_filesystem
;
930 #ifdef CONFIG_CIFS_DFS_UPCALL
931 rc
= cifs_init_dns_resolver();
933 goto out_unregister_key_type
;
935 rc
= slow_work_register_user(THIS_MODULE
);
937 goto out_unregister_resolver_key
;
941 out_unregister_resolver_key
:
942 #ifdef CONFIG_CIFS_DFS_UPCALL
943 cifs_exit_dns_resolver();
944 out_unregister_key_type
:
946 #ifdef CONFIG_CIFS_UPCALL
947 unregister_key_type(&cifs_spnego_key_type
);
948 out_unregister_filesystem
:
950 unregister_filesystem(&cifs_fs_type
);
951 out_destroy_request_bufs
:
952 cifs_destroy_request_bufs();
955 out_destroy_inodecache
:
956 cifs_destroy_inodecache();
959 cifs_fscache_unregister();
967 cFYI(DBG2
, "exit_cifs");
969 cifs_fscache_unregister();
970 #ifdef CONFIG_CIFS_DFS_UPCALL
971 cifs_dfs_release_automount_timer();
972 cifs_exit_dns_resolver();
974 #ifdef CONFIG_CIFS_UPCALL
975 unregister_key_type(&cifs_spnego_key_type
);
977 unregister_filesystem(&cifs_fs_type
);
978 cifs_destroy_inodecache();
980 cifs_destroy_request_bufs();
983 MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>");
984 MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */
986 ("VFS to access servers complying with the SNIA CIFS Specification "
987 "e.g. Samba and Windows");
988 MODULE_VERSION(CIFS_VERSION
);
989 module_init(init_cifs
)
990 module_exit(exit_cifs
)