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 bool sign_zero_copy; /* globals init to false automatically */
85 module_param(sign_zero_copy, bool, 0644);
86 MODULE_PARM_DESC(sign_zero_copy, "Don't copy pages on write with signing "
87 "enabled. Default: N");
88 extern mempool_t *cifs_sm_req_poolp;
89 extern mempool_t *cifs_req_poolp;
90 extern mempool_t *cifs_mid_poolp;
93 cifs_sb_active(struct super_block *sb)
95 struct cifs_sb_info *server = CIFS_SB(sb);
97 if (atomic_inc_return(&server->active) == 1)
98 atomic_inc(&sb->s_active);
102 cifs_sb_deactive(struct super_block *sb)
104 struct cifs_sb_info *server = CIFS_SB(sb);
106 if (atomic_dec_and_test(&server->active))
107 deactivate_super(sb);
111 cifs_read_super(struct super_block *sb, void *data,
112 const char *devname, int silent)
115 struct cifs_sb_info *cifs_sb;
118 /* BB should we make this contingent on mount parm? */
119 sb->s_flags |= MS_NODIRATIME | MS_NOATIME;
120 sb->s_fs_info = kzalloc(sizeof(struct cifs_sb_info), GFP_KERNEL);
121 cifs_sb = CIFS_SB(sb);
125 spin_lock_init(&cifs_sb->tlink_tree_lock);
126 cifs_sb->tlink_tree = RB_ROOT;
128 rc = bdi_setup_and_register(&cifs_sb->bdi, "cifs", BDI_CAP_MAP_COPY);
133 cifs_sb->bdi.ra_pages = default_backing_dev_info.ra_pages;
135 #ifdef CONFIG_CIFS_DFS_UPCALL
136 /* copy mount params to sb for use in submounts */
137 /* BB: should we move this after the mount so we
138 * do not have to do the copy on failed mounts?
139 * BB: May be it is better to do simple copy before
140 * complex operation (mount), and in case of fail
141 * just exit instead of doing mount and attempting
142 * undo it if this copy fails?*/
144 int len = strlen(data);
145 cifs_sb->mountdata = kzalloc(len + 1, GFP_KERNEL);
146 if (cifs_sb->mountdata == NULL) {
147 bdi_destroy(&cifs_sb->bdi);
148 kfree(sb->s_fs_info);
149 sb->s_fs_info = NULL;
152 strncpy(cifs_sb->mountdata, data, len + 1);
153 cifs_sb->mountdata[len] = '\0';
157 rc = cifs_mount(sb, cifs_sb, data, devname);
161 cERROR(1, "cifs_mount failed w/return code = %d", rc);
162 goto out_mount_failed;
165 sb->s_magic = CIFS_MAGIC_NUMBER;
166 sb->s_op = &cifs_super_ops;
167 sb->s_bdi = &cifs_sb->bdi;
168 sb->s_blocksize = CIFS_MAX_MSGSIZE;
169 sb->s_blocksize_bits = 14; /* default 2**14 = CIFS_MAX_MSGSIZE */
170 inode = cifs_root_iget(sb, ROOT_I);
178 sb->s_root = d_alloc_root(inode);
185 /* do that *after* d_alloc_root() - we want NULL ->d_op for root here */
186 if (cifs_sb_master_tcon(cifs_sb)->nocase)
187 sb->s_d_op = &cifs_ci_dentry_ops;
189 sb->s_d_op = &cifs_dentry_ops;
191 #ifdef CONFIG_CIFS_EXPERIMENTAL
192 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
193 cFYI(1, "export ops supported");
194 sb->s_export_op = &cifs_export_ops;
196 #endif /* EXPERIMENTAL */
201 cERROR(1, "cifs_read_super: get root inode failed");
205 cifs_umount(sb, cifs_sb);
209 #ifdef CONFIG_CIFS_DFS_UPCALL
210 if (cifs_sb->mountdata) {
211 kfree(cifs_sb->mountdata);
212 cifs_sb->mountdata = NULL;
215 unload_nls(cifs_sb->local_nls);
216 bdi_destroy(&cifs_sb->bdi);
223 cifs_put_super(struct super_block *sb)
226 struct cifs_sb_info *cifs_sb;
228 cFYI(1, "In cifs_put_super");
229 cifs_sb = CIFS_SB(sb);
230 if (cifs_sb == NULL) {
231 cFYI(1, "Empty cifs superblock info passed to unmount");
235 rc = cifs_umount(sb, cifs_sb);
237 cERROR(1, "cifs_umount failed with return code %d", rc);
238 #ifdef CONFIG_CIFS_DFS_UPCALL
239 if (cifs_sb->mountdata) {
240 kfree(cifs_sb->mountdata);
241 cifs_sb->mountdata = NULL;
245 unload_nls(cifs_sb->local_nls);
246 bdi_destroy(&cifs_sb->bdi);
251 cifs_statfs(struct dentry *dentry, struct kstatfs *buf)
253 struct super_block *sb = dentry->d_sb;
254 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
255 struct cifsTconInfo *tcon = cifs_sb_master_tcon(cifs_sb);
256 int rc = -EOPNOTSUPP;
261 buf->f_type = CIFS_MAGIC_NUMBER;
264 * PATH_MAX may be too long - it would presumably be total path,
265 * but note that some servers (includinng Samba 3) have a shorter
268 * Instead could get the real value via SMB_QUERY_FS_ATTRIBUTE_INFO.
270 buf->f_namelen = PATH_MAX;
271 buf->f_files = 0; /* undefined */
272 buf->f_ffree = 0; /* unlimited */
275 * We could add a second check for a QFS Unix capability bit
277 if ((tcon->ses->capabilities & CAP_UNIX) &&
278 (CIFS_POSIX_EXTENSIONS & le64_to_cpu(tcon->fsUnixInfo.Capability)))
279 rc = CIFSSMBQFSPosixInfo(xid, tcon, buf);
282 * Only need to call the old QFSInfo if failed on newer one,
285 if (rc && (tcon->ses->capabilities & CAP_NT_SMBS))
286 rc = CIFSSMBQFSInfo(xid, tcon, buf);
289 * Some old Windows servers also do not support level 103, retry with
290 * older level one if old server failed the previous call or we
291 * bypassed it because we detected that this was an older LANMAN sess
294 rc = SMBOldQFSInfo(xid, tcon, buf);
300 static int cifs_permission(struct inode *inode, int mask, unsigned int flags)
302 struct cifs_sb_info *cifs_sb;
304 if (flags & IPERM_FLAG_RCU)
307 cifs_sb = CIFS_SB(inode->i_sb);
309 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) {
310 if ((mask & MAY_EXEC) && !execute_ok(inode))
314 } else /* file mode might have been restricted at mount time
315 on the client (above and beyond ACL on servers) for
316 servers which do not support setting and viewing mode bits,
317 so allowing client to check permissions is useful */
318 return generic_permission(inode, mask, flags, NULL);
321 static struct kmem_cache *cifs_inode_cachep;
322 static struct kmem_cache *cifs_req_cachep;
323 static struct kmem_cache *cifs_mid_cachep;
324 static struct kmem_cache *cifs_sm_req_cachep;
325 mempool_t *cifs_sm_req_poolp;
326 mempool_t *cifs_req_poolp;
327 mempool_t *cifs_mid_poolp;
329 static struct inode *
330 cifs_alloc_inode(struct super_block *sb)
332 struct cifsInodeInfo *cifs_inode;
333 cifs_inode = kmem_cache_alloc(cifs_inode_cachep, GFP_KERNEL);
336 cifs_inode->cifsAttrs = 0x20; /* default */
337 cifs_inode->time = 0;
338 /* Until the file is open and we have gotten oplock
339 info back from the server, can not assume caching of
340 file data or metadata */
341 cifs_set_oplock_level(cifs_inode, 0);
342 cifs_inode->delete_pending = false;
343 cifs_inode->invalid_mapping = false;
344 cifs_inode->vfs_inode.i_blkbits = 14; /* 2**14 = CIFS_MAX_MSGSIZE */
345 cifs_inode->server_eof = 0;
346 cifs_inode->uniqueid = 0;
347 cifs_inode->createtime = 0;
349 /* Can not set i_flags here - they get immediately overwritten
350 to zero by the VFS */
351 /* cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME;*/
352 INIT_LIST_HEAD(&cifs_inode->openFileList);
353 return &cifs_inode->vfs_inode;
356 static void cifs_i_callback(struct rcu_head *head)
358 struct inode *inode = container_of(head, struct inode, i_rcu);
359 INIT_LIST_HEAD(&inode->i_dentry);
360 kmem_cache_free(cifs_inode_cachep, CIFS_I(inode));
364 cifs_destroy_inode(struct inode *inode)
366 call_rcu(&inode->i_rcu, cifs_i_callback);
370 cifs_evict_inode(struct inode *inode)
372 truncate_inode_pages(&inode->i_data, 0);
373 end_writeback(inode);
374 cifs_fscache_release_inode_cookie(inode);
378 cifs_show_address(struct seq_file *s, struct TCP_Server_Info *server)
380 struct sockaddr_in *sa = (struct sockaddr_in *) &server->dstaddr;
381 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *) &server->dstaddr;
383 seq_printf(s, ",addr=");
385 switch (server->dstaddr.ss_family) {
387 seq_printf(s, "%pI4", &sa->sin_addr.s_addr);
390 seq_printf(s, "%pI6", &sa6->sin6_addr.s6_addr);
391 if (sa6->sin6_scope_id)
392 seq_printf(s, "%%%u", sa6->sin6_scope_id);
395 seq_printf(s, "(unknown)");
400 * cifs_show_options() is for displaying mount options in /proc/mounts.
401 * Not all settable options are displayed but most of the important
405 cifs_show_options(struct seq_file *s, struct vfsmount *m)
407 struct cifs_sb_info *cifs_sb = CIFS_SB(m->mnt_sb);
408 struct cifsTconInfo *tcon = cifs_sb_master_tcon(cifs_sb);
409 struct sockaddr *srcaddr;
410 srcaddr = (struct sockaddr *)&tcon->ses->server->srcaddr;
412 seq_printf(s, ",unc=%s", tcon->treeName);
414 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER)
415 seq_printf(s, ",multiuser");
416 else if (tcon->ses->user_name)
417 seq_printf(s, ",username=%s", tcon->ses->user_name);
419 if (tcon->ses->domainName)
420 seq_printf(s, ",domain=%s", tcon->ses->domainName);
422 if (srcaddr->sa_family != AF_UNSPEC) {
423 struct sockaddr_in *saddr4;
424 struct sockaddr_in6 *saddr6;
425 saddr4 = (struct sockaddr_in *)srcaddr;
426 saddr6 = (struct sockaddr_in6 *)srcaddr;
427 if (srcaddr->sa_family == AF_INET6)
428 seq_printf(s, ",srcaddr=%pI6c",
430 else if (srcaddr->sa_family == AF_INET)
431 seq_printf(s, ",srcaddr=%pI4",
432 &saddr4->sin_addr.s_addr);
434 seq_printf(s, ",srcaddr=BAD-AF:%i",
435 (int)(srcaddr->sa_family));
438 seq_printf(s, ",uid=%d", cifs_sb->mnt_uid);
439 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)
440 seq_printf(s, ",forceuid");
442 seq_printf(s, ",noforceuid");
444 seq_printf(s, ",gid=%d", cifs_sb->mnt_gid);
445 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)
446 seq_printf(s, ",forcegid");
448 seq_printf(s, ",noforcegid");
450 cifs_show_address(s, tcon->ses->server);
453 seq_printf(s, ",file_mode=0%o,dir_mode=0%o",
454 cifs_sb->mnt_file_mode,
455 cifs_sb->mnt_dir_mode);
457 seq_printf(s, ",seal");
459 seq_printf(s, ",nocase");
461 seq_printf(s, ",hard");
462 if (cifs_sb->prepath)
463 seq_printf(s, ",prepath=%s", cifs_sb->prepath);
464 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
465 seq_printf(s, ",posixpaths");
466 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)
467 seq_printf(s, ",setuids");
468 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
469 seq_printf(s, ",serverino");
470 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO)
471 seq_printf(s, ",directio");
472 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
473 seq_printf(s, ",nouser_xattr");
474 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR)
475 seq_printf(s, ",mapchars");
476 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)
477 seq_printf(s, ",sfu");
478 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
479 seq_printf(s, ",nobrl");
480 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
481 seq_printf(s, ",cifsacl");
482 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)
483 seq_printf(s, ",dynperm");
484 if (m->mnt_sb->s_flags & MS_POSIXACL)
485 seq_printf(s, ",acl");
486 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS)
487 seq_printf(s, ",mfsymlinks");
488 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_FSCACHE)
489 seq_printf(s, ",fsc");
491 seq_printf(s, ",rsize=%d", cifs_sb->rsize);
492 seq_printf(s, ",wsize=%d", cifs_sb->wsize);
493 /* convert actimeo and display it in seconds */
494 seq_printf(s, ",actimeo=%lu", cifs_sb->actimeo / HZ);
499 static void cifs_umount_begin(struct super_block *sb)
501 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
502 struct cifsTconInfo *tcon;
507 tcon = cifs_sb_master_tcon(cifs_sb);
509 spin_lock(&cifs_tcp_ses_lock);
510 if ((tcon->tc_count > 1) || (tcon->tidStatus == CifsExiting)) {
511 /* we have other mounts to same share or we have
512 already tried to force umount this and woken up
513 all waiting network requests, nothing to do */
514 spin_unlock(&cifs_tcp_ses_lock);
516 } else if (tcon->tc_count == 1)
517 tcon->tidStatus = CifsExiting;
518 spin_unlock(&cifs_tcp_ses_lock);
520 /* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */
521 /* cancel_notify_requests(tcon); */
522 if (tcon->ses && tcon->ses->server) {
523 cFYI(1, "wake up tasks now - umount begin not complete");
524 wake_up_all(&tcon->ses->server->request_q);
525 wake_up_all(&tcon->ses->server->response_q);
526 msleep(1); /* yield */
527 /* we have to kick the requests once more */
528 wake_up_all(&tcon->ses->server->response_q);
535 #ifdef CONFIG_CIFS_STATS2
536 static int cifs_show_stats(struct seq_file *s, struct vfsmount *mnt)
543 static int cifs_remount(struct super_block *sb, int *flags, char *data)
545 *flags |= MS_NODIRATIME;
549 static int cifs_drop_inode(struct inode *inode)
551 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
553 /* no serverino => unconditional eviction */
554 return !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) ||
555 generic_drop_inode(inode);
558 static const struct super_operations cifs_super_ops = {
559 .put_super = cifs_put_super,
560 .statfs = cifs_statfs,
561 .alloc_inode = cifs_alloc_inode,
562 .destroy_inode = cifs_destroy_inode,
563 .drop_inode = cifs_drop_inode,
564 .evict_inode = cifs_evict_inode,
565 /* .delete_inode = cifs_delete_inode, */ /* Do not need above
566 function unless later we add lazy close of inodes or unless the
567 kernel forgets to call us with the same number of releases (closes)
569 .show_options = cifs_show_options,
570 .umount_begin = cifs_umount_begin,
571 .remount_fs = cifs_remount,
572 #ifdef CONFIG_CIFS_STATS2
573 .show_stats = cifs_show_stats,
577 static struct dentry *
578 cifs_do_mount(struct file_system_type *fs_type,
579 int flags, const char *dev_name, void *data)
582 struct super_block *sb;
584 sb = sget(fs_type, NULL, set_anon_super, NULL);
586 cFYI(1, "Devname: %s flags: %d ", dev_name, flags);
593 rc = cifs_read_super(sb, data, dev_name, flags & MS_SILENT ? 1 : 0);
595 deactivate_locked_super(sb);
598 sb->s_flags |= MS_ACTIVE;
599 return dget(sb->s_root);
602 static ssize_t cifs_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
603 unsigned long nr_segs, loff_t pos)
605 struct inode *inode = iocb->ki_filp->f_path.dentry->d_inode;
609 written = generic_file_aio_write(iocb, iov, nr_segs, pos);
611 if (CIFS_I(inode)->clientCanCacheAll)
614 rc = filemap_fdatawrite(inode->i_mapping);
616 cFYI(1, "cifs_file_aio_write: %d rc on %p inode", rc, inode);
621 static loff_t cifs_llseek(struct file *file, loff_t offset, int origin)
623 /* origin == SEEK_END => we must revalidate the cached file length */
624 if (origin == SEEK_END) {
627 /* some applications poll for the file length in this strange
628 way so we must seek to end on non-oplocked files by
629 setting the revalidate time to zero */
630 CIFS_I(file->f_path.dentry->d_inode)->time = 0;
632 retval = cifs_revalidate_file(file);
634 return (loff_t)retval;
636 return generic_file_llseek_unlocked(file, offset, origin);
639 static int cifs_setlease(struct file *file, long arg, struct file_lock **lease)
641 /* note that this is called by vfs setlease with lock_flocks held
642 to protect *lease from going away */
643 struct inode *inode = file->f_path.dentry->d_inode;
644 struct cifsFileInfo *cfile = file->private_data;
646 if (!(S_ISREG(inode->i_mode)))
649 /* check if file is oplocked */
650 if (((arg == F_RDLCK) &&
651 (CIFS_I(inode)->clientCanCacheRead)) ||
653 (CIFS_I(inode)->clientCanCacheAll)))
654 return generic_setlease(file, arg, lease);
655 else if (tlink_tcon(cfile->tlink)->local_lease &&
656 !CIFS_I(inode)->clientCanCacheRead)
657 /* If the server claims to support oplock on this
658 file, then we still need to check oplock even
659 if the local_lease mount option is set, but there
660 are servers which do not support oplock for which
661 this mount option may be useful if the user
662 knows that the file won't be changed on the server
664 return generic_setlease(file, arg, lease);
669 struct file_system_type cifs_fs_type = {
670 .owner = THIS_MODULE,
672 .mount = cifs_do_mount,
673 .kill_sb = kill_anon_super,
676 const struct inode_operations cifs_dir_inode_ops = {
677 .create = cifs_create,
678 .lookup = cifs_lookup,
679 .getattr = cifs_getattr,
680 .unlink = cifs_unlink,
681 .link = cifs_hardlink,
684 .rename = cifs_rename,
685 .permission = cifs_permission,
686 /* revalidate:cifs_revalidate, */
687 .setattr = cifs_setattr,
688 .symlink = cifs_symlink,
690 #ifdef CONFIG_CIFS_XATTR
691 .setxattr = cifs_setxattr,
692 .getxattr = cifs_getxattr,
693 .listxattr = cifs_listxattr,
694 .removexattr = cifs_removexattr,
698 const struct inode_operations cifs_file_inode_ops = {
699 /* revalidate:cifs_revalidate, */
700 .setattr = cifs_setattr,
701 .getattr = cifs_getattr, /* do we need this anymore? */
702 .rename = cifs_rename,
703 .permission = cifs_permission,
704 #ifdef CONFIG_CIFS_XATTR
705 .setxattr = cifs_setxattr,
706 .getxattr = cifs_getxattr,
707 .listxattr = cifs_listxattr,
708 .removexattr = cifs_removexattr,
712 const struct inode_operations cifs_symlink_inode_ops = {
713 .readlink = generic_readlink,
714 .follow_link = cifs_follow_link,
715 .put_link = cifs_put_link,
716 .permission = cifs_permission,
717 /* BB add the following two eventually */
718 /* revalidate: cifs_revalidate,
719 setattr: cifs_notify_change, *//* BB do we need notify change */
720 #ifdef CONFIG_CIFS_XATTR
721 .setxattr = cifs_setxattr,
722 .getxattr = cifs_getxattr,
723 .listxattr = cifs_listxattr,
724 .removexattr = cifs_removexattr,
728 const struct file_operations cifs_file_ops = {
729 .read = do_sync_read,
730 .write = do_sync_write,
731 .aio_read = generic_file_aio_read,
732 .aio_write = cifs_file_aio_write,
734 .release = cifs_close,
738 .mmap = cifs_file_mmap,
739 .splice_read = generic_file_splice_read,
740 .llseek = cifs_llseek,
741 #ifdef CONFIG_CIFS_POSIX
742 .unlocked_ioctl = cifs_ioctl,
743 #endif /* CONFIG_CIFS_POSIX */
744 .setlease = cifs_setlease,
747 const struct file_operations cifs_file_strict_ops = {
748 .read = do_sync_read,
749 .write = do_sync_write,
750 .aio_read = cifs_strict_readv,
751 .aio_write = cifs_strict_writev,
753 .release = cifs_close,
755 .fsync = cifs_strict_fsync,
757 .mmap = cifs_file_strict_mmap,
758 .splice_read = generic_file_splice_read,
759 .llseek = cifs_llseek,
760 #ifdef CONFIG_CIFS_POSIX
761 .unlocked_ioctl = cifs_ioctl,
762 #endif /* CONFIG_CIFS_POSIX */
763 .setlease = cifs_setlease,
766 const struct file_operations cifs_file_direct_ops = {
767 /* no aio, no readv -
768 BB reevaluate whether they can be done with directio, no cache */
769 .read = cifs_user_read,
770 .write = cifs_user_write,
772 .release = cifs_close,
776 .mmap = cifs_file_mmap,
777 .splice_read = generic_file_splice_read,
778 #ifdef CONFIG_CIFS_POSIX
779 .unlocked_ioctl = cifs_ioctl,
780 #endif /* CONFIG_CIFS_POSIX */
781 .llseek = cifs_llseek,
782 .setlease = cifs_setlease,
785 const struct file_operations cifs_file_nobrl_ops = {
786 .read = do_sync_read,
787 .write = do_sync_write,
788 .aio_read = generic_file_aio_read,
789 .aio_write = cifs_file_aio_write,
791 .release = cifs_close,
794 .mmap = cifs_file_mmap,
795 .splice_read = generic_file_splice_read,
796 .llseek = cifs_llseek,
797 #ifdef CONFIG_CIFS_POSIX
798 .unlocked_ioctl = cifs_ioctl,
799 #endif /* CONFIG_CIFS_POSIX */
800 .setlease = cifs_setlease,
803 const struct file_operations cifs_file_strict_nobrl_ops = {
804 .read = do_sync_read,
805 .write = do_sync_write,
806 .aio_read = cifs_strict_readv,
807 .aio_write = cifs_strict_writev,
809 .release = cifs_close,
810 .fsync = cifs_strict_fsync,
812 .mmap = cifs_file_strict_mmap,
813 .splice_read = generic_file_splice_read,
814 .llseek = cifs_llseek,
815 #ifdef CONFIG_CIFS_POSIX
816 .unlocked_ioctl = cifs_ioctl,
817 #endif /* CONFIG_CIFS_POSIX */
818 .setlease = cifs_setlease,
821 const struct file_operations cifs_file_direct_nobrl_ops = {
822 /* no mmap, no aio, no readv -
823 BB reevaluate whether they can be done with directio, no cache */
824 .read = cifs_user_read,
825 .write = cifs_user_write,
827 .release = cifs_close,
830 .mmap = cifs_file_mmap,
831 .splice_read = generic_file_splice_read,
832 #ifdef CONFIG_CIFS_POSIX
833 .unlocked_ioctl = cifs_ioctl,
834 #endif /* CONFIG_CIFS_POSIX */
835 .llseek = cifs_llseek,
836 .setlease = cifs_setlease,
839 const struct file_operations cifs_dir_ops = {
840 .readdir = cifs_readdir,
841 .release = cifs_closedir,
842 .read = generic_read_dir,
843 .unlocked_ioctl = cifs_ioctl,
844 .llseek = generic_file_llseek,
848 cifs_init_once(void *inode)
850 struct cifsInodeInfo *cifsi = inode;
852 inode_init_once(&cifsi->vfs_inode);
853 INIT_LIST_HEAD(&cifsi->lockList);
857 cifs_init_inodecache(void)
859 cifs_inode_cachep = kmem_cache_create("cifs_inode_cache",
860 sizeof(struct cifsInodeInfo),
861 0, (SLAB_RECLAIM_ACCOUNT|
864 if (cifs_inode_cachep == NULL)
871 cifs_destroy_inodecache(void)
873 kmem_cache_destroy(cifs_inode_cachep);
877 cifs_init_request_bufs(void)
879 if (CIFSMaxBufSize < 8192) {
880 /* Buffer size can not be smaller than 2 * PATH_MAX since maximum
881 Unicode path name has to fit in any SMB/CIFS path based frames */
882 CIFSMaxBufSize = 8192;
883 } else if (CIFSMaxBufSize > 1024*127) {
884 CIFSMaxBufSize = 1024 * 127;
886 CIFSMaxBufSize &= 0x1FE00; /* Round size to even 512 byte mult*/
888 /* cERROR(1, "CIFSMaxBufSize %d 0x%x",CIFSMaxBufSize,CIFSMaxBufSize); */
889 cifs_req_cachep = kmem_cache_create("cifs_request",
891 MAX_CIFS_HDR_SIZE, 0,
892 SLAB_HWCACHE_ALIGN, NULL);
893 if (cifs_req_cachep == NULL)
896 if (cifs_min_rcv < 1)
898 else if (cifs_min_rcv > 64) {
900 cERROR(1, "cifs_min_rcv set to maximum (64)");
903 cifs_req_poolp = mempool_create_slab_pool(cifs_min_rcv,
906 if (cifs_req_poolp == NULL) {
907 kmem_cache_destroy(cifs_req_cachep);
910 /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and
911 almost all handle based requests (but not write response, nor is it
912 sufficient for path based requests). A smaller size would have
913 been more efficient (compacting multiple slab items on one 4k page)
914 for the case in which debug was on, but this larger size allows
915 more SMBs to use small buffer alloc and is still much more
916 efficient to alloc 1 per page off the slab compared to 17K (5page)
917 alloc of large cifs buffers even when page debugging is on */
918 cifs_sm_req_cachep = kmem_cache_create("cifs_small_rq",
919 MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN,
921 if (cifs_sm_req_cachep == NULL) {
922 mempool_destroy(cifs_req_poolp);
923 kmem_cache_destroy(cifs_req_cachep);
927 if (cifs_min_small < 2)
929 else if (cifs_min_small > 256) {
930 cifs_min_small = 256;
931 cFYI(1, "cifs_min_small set to maximum (256)");
934 cifs_sm_req_poolp = mempool_create_slab_pool(cifs_min_small,
937 if (cifs_sm_req_poolp == NULL) {
938 mempool_destroy(cifs_req_poolp);
939 kmem_cache_destroy(cifs_req_cachep);
940 kmem_cache_destroy(cifs_sm_req_cachep);
948 cifs_destroy_request_bufs(void)
950 mempool_destroy(cifs_req_poolp);
951 kmem_cache_destroy(cifs_req_cachep);
952 mempool_destroy(cifs_sm_req_poolp);
953 kmem_cache_destroy(cifs_sm_req_cachep);
959 cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids",
960 sizeof(struct mid_q_entry), 0,
961 SLAB_HWCACHE_ALIGN, NULL);
962 if (cifs_mid_cachep == NULL)
965 /* 3 is a reasonable minimum number of simultaneous operations */
966 cifs_mid_poolp = mempool_create_slab_pool(3, cifs_mid_cachep);
967 if (cifs_mid_poolp == NULL) {
968 kmem_cache_destroy(cifs_mid_cachep);
976 cifs_destroy_mids(void)
978 mempool_destroy(cifs_mid_poolp);
979 kmem_cache_destroy(cifs_mid_cachep);
987 INIT_LIST_HEAD(&cifs_tcp_ses_list);
988 #ifdef CONFIG_CIFS_EXPERIMENTAL
989 INIT_LIST_HEAD(&GlobalDnotifyReqList);
990 INIT_LIST_HEAD(&GlobalDnotifyRsp_Q);
993 * Initialize Global counters
995 atomic_set(&sesInfoAllocCount, 0);
996 atomic_set(&tconInfoAllocCount, 0);
997 atomic_set(&tcpSesAllocCount, 0);
998 atomic_set(&tcpSesReconnectCount, 0);
999 atomic_set(&tconInfoReconnectCount, 0);
1001 atomic_set(&bufAllocCount, 0);
1002 atomic_set(&smBufAllocCount, 0);
1003 #ifdef CONFIG_CIFS_STATS2
1004 atomic_set(&totBufAllocCount, 0);
1005 atomic_set(&totSmBufAllocCount, 0);
1006 #endif /* CONFIG_CIFS_STATS2 */
1008 atomic_set(&midCount, 0);
1009 GlobalCurrentXid = 0;
1010 GlobalTotalActiveXid = 0;
1011 GlobalMaxActiveXid = 0;
1012 spin_lock_init(&cifs_tcp_ses_lock);
1013 spin_lock_init(&cifs_file_list_lock);
1014 spin_lock_init(&GlobalMid_Lock);
1016 if (cifs_max_pending < 2) {
1017 cifs_max_pending = 2;
1018 cFYI(1, "cifs_max_pending set to min of 2");
1019 } else if (cifs_max_pending > 256) {
1020 cifs_max_pending = 256;
1021 cFYI(1, "cifs_max_pending set to max of 256");
1024 rc = cifs_fscache_register();
1026 goto out_clean_proc;
1028 rc = cifs_init_inodecache();
1030 goto out_unreg_fscache;
1032 rc = cifs_init_mids();
1034 goto out_destroy_inodecache;
1036 rc = cifs_init_request_bufs();
1038 goto out_destroy_mids;
1040 rc = register_filesystem(&cifs_fs_type);
1042 goto out_destroy_request_bufs;
1043 #ifdef CONFIG_CIFS_UPCALL
1044 rc = register_key_type(&cifs_spnego_key_type);
1046 goto out_unregister_filesystem;
1051 #ifdef CONFIG_CIFS_UPCALL
1052 out_unregister_filesystem:
1053 unregister_filesystem(&cifs_fs_type);
1055 out_destroy_request_bufs:
1056 cifs_destroy_request_bufs();
1058 cifs_destroy_mids();
1059 out_destroy_inodecache:
1060 cifs_destroy_inodecache();
1062 cifs_fscache_unregister();
1071 cFYI(DBG2, "exit_cifs");
1073 cifs_fscache_unregister();
1074 #ifdef CONFIG_CIFS_DFS_UPCALL
1075 cifs_dfs_release_automount_timer();
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)