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 experimEnabled = 0;
57 unsigned int linuxExtEnabled = 1;
58 unsigned int lookupCacheEnabled = 1;
59 unsigned int multiuser_mount = 0;
60 unsigned int global_secflags = CIFSSEC_DEF;
61 /* unsigned int ntlmv2_support = 0; */
62 unsigned int sign_CIFS_PDUs = 1;
63 static const struct super_operations cifs_super_ops;
64 unsigned int CIFSMaxBufSize = CIFS_MAX_MSGSIZE;
65 module_param(CIFSMaxBufSize, int, 0);
66 MODULE_PARM_DESC(CIFSMaxBufSize, "Network buffer size (not including header). "
67 "Default: 16384 Range: 8192 to 130048");
68 unsigned int cifs_min_rcv = CIFS_MIN_RCV_POOL;
69 module_param(cifs_min_rcv, int, 0);
70 MODULE_PARM_DESC(cifs_min_rcv, "Network buffers in pool. Default: 4 Range: "
72 unsigned int cifs_min_small = 30;
73 module_param(cifs_min_small, int, 0);
74 MODULE_PARM_DESC(cifs_min_small, "Small network buffers in pool. Default: 30 "
76 unsigned int cifs_max_pending = CIFS_MAX_REQ;
77 module_param(cifs_max_pending, int, 0);
78 MODULE_PARM_DESC(cifs_max_pending, "Simultaneous requests to server. "
79 "Default: 50 Range: 2 to 256");
81 extern mempool_t *cifs_sm_req_poolp;
82 extern mempool_t *cifs_req_poolp;
83 extern mempool_t *cifs_mid_poolp;
86 cifs_sb_active(struct super_block *sb)
88 struct cifs_sb_info *server = CIFS_SB(sb);
90 if (atomic_inc_return(&server->active) == 1)
91 atomic_inc(&sb->s_active);
95 cifs_sb_deactive(struct super_block *sb)
97 struct cifs_sb_info *server = CIFS_SB(sb);
99 if (atomic_dec_and_test(&server->active))
100 deactivate_super(sb);
104 cifs_read_super(struct super_block *sb, void *data,
105 const char *devname, int silent)
108 struct cifs_sb_info *cifs_sb;
111 /* BB should we make this contingent on mount parm? */
112 sb->s_flags |= MS_NODIRATIME | MS_NOATIME;
113 sb->s_fs_info = kzalloc(sizeof(struct cifs_sb_info), GFP_KERNEL);
114 cifs_sb = CIFS_SB(sb);
118 spin_lock_init(&cifs_sb->tlink_tree_lock);
119 cifs_sb->tlink_tree = RB_ROOT;
121 rc = bdi_setup_and_register(&cifs_sb->bdi, "cifs", BDI_CAP_MAP_COPY);
127 #ifdef CONFIG_CIFS_DFS_UPCALL
128 /* copy mount params to sb for use in submounts */
129 /* BB: should we move this after the mount so we
130 * do not have to do the copy on failed mounts?
131 * BB: May be it is better to do simple copy before
132 * complex operation (mount), and in case of fail
133 * just exit instead of doing mount and attempting
134 * undo it if this copy fails?*/
136 int len = strlen(data);
137 cifs_sb->mountdata = kzalloc(len + 1, GFP_KERNEL);
138 if (cifs_sb->mountdata == NULL) {
139 bdi_destroy(&cifs_sb->bdi);
140 kfree(sb->s_fs_info);
141 sb->s_fs_info = NULL;
144 strncpy(cifs_sb->mountdata, data, len + 1);
145 cifs_sb->mountdata[len] = '\0';
149 rc = cifs_mount(sb, cifs_sb, data, devname);
153 cERROR(1, "cifs_mount failed w/return code = %d", rc);
154 goto out_mount_failed;
157 sb->s_magic = CIFS_MAGIC_NUMBER;
158 sb->s_op = &cifs_super_ops;
159 sb->s_bdi = &cifs_sb->bdi;
160 sb->s_blocksize = CIFS_MAX_MSGSIZE;
161 sb->s_blocksize_bits = 14; /* default 2**14 = CIFS_MAX_MSGSIZE */
162 inode = cifs_root_iget(sb, ROOT_I);
170 sb->s_root = d_alloc_root(inode);
177 #ifdef CONFIG_CIFS_EXPERIMENTAL
178 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
179 cFYI(1, "export ops supported");
180 sb->s_export_op = &cifs_export_ops;
182 #endif /* EXPERIMENTAL */
187 cERROR(1, "cifs_read_super: get root inode failed");
191 cifs_umount(sb, cifs_sb);
195 #ifdef CONFIG_CIFS_DFS_UPCALL
196 if (cifs_sb->mountdata) {
197 kfree(cifs_sb->mountdata);
198 cifs_sb->mountdata = NULL;
201 unload_nls(cifs_sb->local_nls);
202 bdi_destroy(&cifs_sb->bdi);
209 cifs_put_super(struct super_block *sb)
212 struct cifs_sb_info *cifs_sb;
214 cFYI(1, "In cifs_put_super");
215 cifs_sb = CIFS_SB(sb);
216 if (cifs_sb == NULL) {
217 cFYI(1, "Empty cifs superblock info passed to unmount");
221 rc = cifs_umount(sb, cifs_sb);
223 cERROR(1, "cifs_umount failed with return code %d", rc);
224 #ifdef CONFIG_CIFS_DFS_UPCALL
225 if (cifs_sb->mountdata) {
226 kfree(cifs_sb->mountdata);
227 cifs_sb->mountdata = NULL;
231 unload_nls(cifs_sb->local_nls);
232 bdi_destroy(&cifs_sb->bdi);
237 cifs_statfs(struct dentry *dentry, struct kstatfs *buf)
239 struct super_block *sb = dentry->d_sb;
240 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
241 struct cifsTconInfo *tcon = cifs_sb_master_tcon(cifs_sb);
242 int rc = -EOPNOTSUPP;
247 buf->f_type = CIFS_MAGIC_NUMBER;
250 * PATH_MAX may be too long - it would presumably be total path,
251 * but note that some servers (includinng Samba 3) have a shorter
254 * Instead could get the real value via SMB_QUERY_FS_ATTRIBUTE_INFO.
256 buf->f_namelen = PATH_MAX;
257 buf->f_files = 0; /* undefined */
258 buf->f_ffree = 0; /* unlimited */
261 * We could add a second check for a QFS Unix capability bit
263 if ((tcon->ses->capabilities & CAP_UNIX) &&
264 (CIFS_POSIX_EXTENSIONS & le64_to_cpu(tcon->fsUnixInfo.Capability)))
265 rc = CIFSSMBQFSPosixInfo(xid, tcon, buf);
268 * Only need to call the old QFSInfo if failed on newer one,
271 if (rc && (tcon->ses->capabilities & CAP_NT_SMBS))
272 rc = CIFSSMBQFSInfo(xid, tcon, buf);
275 * Some old Windows servers also do not support level 103, retry with
276 * older level one if old server failed the previous call or we
277 * bypassed it because we detected that this was an older LANMAN sess
280 rc = SMBOldQFSInfo(xid, tcon, buf);
286 static int cifs_permission(struct inode *inode, int mask, unsigned int flags)
288 struct cifs_sb_info *cifs_sb;
290 if (flags & IPERM_FLAG_RCU)
293 cifs_sb = CIFS_SB(inode->i_sb);
295 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) {
296 if ((mask & MAY_EXEC) && !execute_ok(inode))
300 } else /* file mode might have been restricted at mount time
301 on the client (above and beyond ACL on servers) for
302 servers which do not support setting and viewing mode bits,
303 so allowing client to check permissions is useful */
304 return generic_permission(inode, mask, flags, NULL);
307 static struct kmem_cache *cifs_inode_cachep;
308 static struct kmem_cache *cifs_req_cachep;
309 static struct kmem_cache *cifs_mid_cachep;
310 static struct kmem_cache *cifs_sm_req_cachep;
311 mempool_t *cifs_sm_req_poolp;
312 mempool_t *cifs_req_poolp;
313 mempool_t *cifs_mid_poolp;
315 static struct inode *
316 cifs_alloc_inode(struct super_block *sb)
318 struct cifsInodeInfo *cifs_inode;
319 cifs_inode = kmem_cache_alloc(cifs_inode_cachep, GFP_KERNEL);
322 cifs_inode->cifsAttrs = 0x20; /* default */
323 cifs_inode->time = 0;
324 /* Until the file is open and we have gotten oplock
325 info back from the server, can not assume caching of
326 file data or metadata */
327 cifs_set_oplock_level(cifs_inode, 0);
328 cifs_inode->delete_pending = false;
329 cifs_inode->invalid_mapping = false;
330 cifs_inode->vfs_inode.i_blkbits = 14; /* 2**14 = CIFS_MAX_MSGSIZE */
331 cifs_inode->server_eof = 0;
333 /* Can not set i_flags here - they get immediately overwritten
334 to zero by the VFS */
335 /* cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME;*/
336 INIT_LIST_HEAD(&cifs_inode->openFileList);
337 return &cifs_inode->vfs_inode;
340 static void cifs_i_callback(struct rcu_head *head)
342 struct inode *inode = container_of(head, struct inode, i_rcu);
343 INIT_LIST_HEAD(&inode->i_dentry);
344 kmem_cache_free(cifs_inode_cachep, CIFS_I(inode));
348 cifs_destroy_inode(struct inode *inode)
350 call_rcu(&inode->i_rcu, cifs_i_callback);
354 cifs_evict_inode(struct inode *inode)
356 truncate_inode_pages(&inode->i_data, 0);
357 end_writeback(inode);
358 cifs_fscache_release_inode_cookie(inode);
362 cifs_show_address(struct seq_file *s, struct TCP_Server_Info *server)
364 seq_printf(s, ",addr=");
366 switch (server->addr.sockAddr.sin_family) {
368 seq_printf(s, "%pI4", &server->addr.sockAddr.sin_addr.s_addr);
371 seq_printf(s, "%pI6",
372 &server->addr.sockAddr6.sin6_addr.s6_addr);
373 if (server->addr.sockAddr6.sin6_scope_id)
374 seq_printf(s, "%%%u",
375 server->addr.sockAddr6.sin6_scope_id);
378 seq_printf(s, "(unknown)");
383 * cifs_show_options() is for displaying mount options in /proc/mounts.
384 * Not all settable options are displayed but most of the important
388 cifs_show_options(struct seq_file *s, struct vfsmount *m)
390 struct cifs_sb_info *cifs_sb = CIFS_SB(m->mnt_sb);
391 struct cifsTconInfo *tcon = cifs_sb_master_tcon(cifs_sb);
392 struct sockaddr *srcaddr;
393 srcaddr = (struct sockaddr *)&tcon->ses->server->srcaddr;
395 seq_printf(s, ",unc=%s", tcon->treeName);
397 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER)
398 seq_printf(s, ",multiuser");
399 else if (tcon->ses->userName)
400 seq_printf(s, ",username=%s", tcon->ses->userName);
402 if (tcon->ses->domainName)
403 seq_printf(s, ",domain=%s", tcon->ses->domainName);
405 if (srcaddr->sa_family != AF_UNSPEC) {
406 struct sockaddr_in *saddr4;
407 struct sockaddr_in6 *saddr6;
408 saddr4 = (struct sockaddr_in *)srcaddr;
409 saddr6 = (struct sockaddr_in6 *)srcaddr;
410 if (srcaddr->sa_family == AF_INET6)
411 seq_printf(s, ",srcaddr=%pI6c",
413 else if (srcaddr->sa_family == AF_INET)
414 seq_printf(s, ",srcaddr=%pI4",
415 &saddr4->sin_addr.s_addr);
417 seq_printf(s, ",srcaddr=BAD-AF:%i",
418 (int)(srcaddr->sa_family));
421 seq_printf(s, ",uid=%d", cifs_sb->mnt_uid);
422 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)
423 seq_printf(s, ",forceuid");
425 seq_printf(s, ",noforceuid");
427 seq_printf(s, ",gid=%d", cifs_sb->mnt_gid);
428 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)
429 seq_printf(s, ",forcegid");
431 seq_printf(s, ",noforcegid");
433 cifs_show_address(s, tcon->ses->server);
436 seq_printf(s, ",file_mode=0%o,dir_mode=0%o",
437 cifs_sb->mnt_file_mode,
438 cifs_sb->mnt_dir_mode);
440 seq_printf(s, ",seal");
442 seq_printf(s, ",nocase");
444 seq_printf(s, ",hard");
445 if (cifs_sb->prepath)
446 seq_printf(s, ",prepath=%s", cifs_sb->prepath);
447 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
448 seq_printf(s, ",posixpaths");
449 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)
450 seq_printf(s, ",setuids");
451 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
452 seq_printf(s, ",serverino");
453 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO)
454 seq_printf(s, ",directio");
455 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
456 seq_printf(s, ",nouser_xattr");
457 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR)
458 seq_printf(s, ",mapchars");
459 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)
460 seq_printf(s, ",sfu");
461 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
462 seq_printf(s, ",nobrl");
463 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
464 seq_printf(s, ",cifsacl");
465 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)
466 seq_printf(s, ",dynperm");
467 if (m->mnt_sb->s_flags & MS_POSIXACL)
468 seq_printf(s, ",acl");
469 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS)
470 seq_printf(s, ",mfsymlinks");
471 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_FSCACHE)
472 seq_printf(s, ",fsc");
474 seq_printf(s, ",rsize=%d", cifs_sb->rsize);
475 seq_printf(s, ",wsize=%d", cifs_sb->wsize);
476 /* convert actimeo and display it in seconds */
477 seq_printf(s, ",actimeo=%lu", cifs_sb->actimeo / HZ);
482 static void cifs_umount_begin(struct super_block *sb)
484 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
485 struct cifsTconInfo *tcon;
490 tcon = cifs_sb_master_tcon(cifs_sb);
492 spin_lock(&cifs_tcp_ses_lock);
493 if ((tcon->tc_count > 1) || (tcon->tidStatus == CifsExiting)) {
494 /* we have other mounts to same share or we have
495 already tried to force umount this and woken up
496 all waiting network requests, nothing to do */
497 spin_unlock(&cifs_tcp_ses_lock);
499 } else if (tcon->tc_count == 1)
500 tcon->tidStatus = CifsExiting;
501 spin_unlock(&cifs_tcp_ses_lock);
503 /* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */
504 /* cancel_notify_requests(tcon); */
505 if (tcon->ses && tcon->ses->server) {
506 cFYI(1, "wake up tasks now - umount begin not complete");
507 wake_up_all(&tcon->ses->server->request_q);
508 wake_up_all(&tcon->ses->server->response_q);
509 msleep(1); /* yield */
510 /* we have to kick the requests once more */
511 wake_up_all(&tcon->ses->server->response_q);
518 #ifdef CONFIG_CIFS_STATS2
519 static int cifs_show_stats(struct seq_file *s, struct vfsmount *mnt)
526 static int cifs_remount(struct super_block *sb, int *flags, char *data)
528 *flags |= MS_NODIRATIME;
532 static int cifs_drop_inode(struct inode *inode)
534 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
536 /* no serverino => unconditional eviction */
537 return !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) ||
538 generic_drop_inode(inode);
541 static const struct super_operations cifs_super_ops = {
542 .put_super = cifs_put_super,
543 .statfs = cifs_statfs,
544 .alloc_inode = cifs_alloc_inode,
545 .destroy_inode = cifs_destroy_inode,
546 .drop_inode = cifs_drop_inode,
547 .evict_inode = cifs_evict_inode,
548 /* .delete_inode = cifs_delete_inode, */ /* Do not need above
549 function unless later we add lazy close of inodes or unless the
550 kernel forgets to call us with the same number of releases (closes)
552 .show_options = cifs_show_options,
553 .umount_begin = cifs_umount_begin,
554 .remount_fs = cifs_remount,
555 #ifdef CONFIG_CIFS_STATS2
556 .show_stats = cifs_show_stats,
560 static struct dentry *
561 cifs_do_mount(struct file_system_type *fs_type,
562 int flags, const char *dev_name, void *data)
565 struct super_block *sb;
567 sb = sget(fs_type, NULL, set_anon_super, NULL);
569 cFYI(1, "Devname: %s flags: %d ", dev_name, flags);
576 rc = cifs_read_super(sb, data, dev_name, flags & MS_SILENT ? 1 : 0);
578 deactivate_locked_super(sb);
581 sb->s_flags |= MS_ACTIVE;
582 return dget(sb->s_root);
585 static ssize_t cifs_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
586 unsigned long nr_segs, loff_t pos)
588 struct inode *inode = iocb->ki_filp->f_path.dentry->d_inode;
591 written = generic_file_aio_write(iocb, iov, nr_segs, pos);
592 if (!CIFS_I(inode)->clientCanCacheAll)
593 filemap_fdatawrite(inode->i_mapping);
597 static loff_t cifs_llseek(struct file *file, loff_t offset, int origin)
599 /* origin == SEEK_END => we must revalidate the cached file length */
600 if (origin == SEEK_END) {
603 /* some applications poll for the file length in this strange
604 way so we must seek to end on non-oplocked files by
605 setting the revalidate time to zero */
606 CIFS_I(file->f_path.dentry->d_inode)->time = 0;
608 retval = cifs_revalidate_file(file);
610 return (loff_t)retval;
612 return generic_file_llseek_unlocked(file, offset, origin);
615 static int cifs_setlease(struct file *file, long arg, struct file_lock **lease)
617 /* note that this is called by vfs setlease with lock_flocks held
618 to protect *lease from going away */
619 struct inode *inode = file->f_path.dentry->d_inode;
620 struct cifsFileInfo *cfile = file->private_data;
622 if (!(S_ISREG(inode->i_mode)))
625 /* check if file is oplocked */
626 if (((arg == F_RDLCK) &&
627 (CIFS_I(inode)->clientCanCacheRead)) ||
629 (CIFS_I(inode)->clientCanCacheAll)))
630 return generic_setlease(file, arg, lease);
631 else if (tlink_tcon(cfile->tlink)->local_lease &&
632 !CIFS_I(inode)->clientCanCacheRead)
633 /* If the server claims to support oplock on this
634 file, then we still need to check oplock even
635 if the local_lease mount option is set, but there
636 are servers which do not support oplock for which
637 this mount option may be useful if the user
638 knows that the file won't be changed on the server
640 return generic_setlease(file, arg, lease);
645 struct file_system_type cifs_fs_type = {
646 .owner = THIS_MODULE,
648 .mount = cifs_do_mount,
649 .kill_sb = kill_anon_super,
652 const struct inode_operations cifs_dir_inode_ops = {
653 .create = cifs_create,
654 .lookup = cifs_lookup,
655 .getattr = cifs_getattr,
656 .unlink = cifs_unlink,
657 .link = cifs_hardlink,
660 .rename = cifs_rename,
661 .permission = cifs_permission,
662 /* revalidate:cifs_revalidate, */
663 .setattr = cifs_setattr,
664 .symlink = cifs_symlink,
666 #ifdef CONFIG_CIFS_XATTR
667 .setxattr = cifs_setxattr,
668 .getxattr = cifs_getxattr,
669 .listxattr = cifs_listxattr,
670 .removexattr = cifs_removexattr,
674 const struct inode_operations cifs_file_inode_ops = {
675 /* revalidate:cifs_revalidate, */
676 .setattr = cifs_setattr,
677 .getattr = cifs_getattr, /* do we need this anymore? */
678 .rename = cifs_rename,
679 .permission = cifs_permission,
680 #ifdef CONFIG_CIFS_XATTR
681 .setxattr = cifs_setxattr,
682 .getxattr = cifs_getxattr,
683 .listxattr = cifs_listxattr,
684 .removexattr = cifs_removexattr,
688 const struct inode_operations cifs_symlink_inode_ops = {
689 .readlink = generic_readlink,
690 .follow_link = cifs_follow_link,
691 .put_link = cifs_put_link,
692 .permission = cifs_permission,
693 /* BB add the following two eventually */
694 /* revalidate: cifs_revalidate,
695 setattr: cifs_notify_change, *//* BB do we need notify change */
696 #ifdef CONFIG_CIFS_XATTR
697 .setxattr = cifs_setxattr,
698 .getxattr = cifs_getxattr,
699 .listxattr = cifs_listxattr,
700 .removexattr = cifs_removexattr,
704 const struct file_operations cifs_file_ops = {
705 .read = do_sync_read,
706 .write = do_sync_write,
707 .aio_read = generic_file_aio_read,
708 .aio_write = cifs_file_aio_write,
710 .release = cifs_close,
714 .mmap = cifs_file_mmap,
715 .splice_read = generic_file_splice_read,
716 .llseek = cifs_llseek,
717 #ifdef CONFIG_CIFS_POSIX
718 .unlocked_ioctl = cifs_ioctl,
719 #endif /* CONFIG_CIFS_POSIX */
720 .setlease = cifs_setlease,
723 const struct file_operations cifs_file_direct_ops = {
724 /* no aio, no readv -
725 BB reevaluate whether they can be done with directio, no cache */
726 .read = cifs_user_read,
727 .write = cifs_user_write,
729 .release = cifs_close,
733 .mmap = cifs_file_mmap,
734 .splice_read = generic_file_splice_read,
735 #ifdef CONFIG_CIFS_POSIX
736 .unlocked_ioctl = cifs_ioctl,
737 #endif /* CONFIG_CIFS_POSIX */
738 .llseek = cifs_llseek,
739 .setlease = cifs_setlease,
741 const struct file_operations cifs_file_nobrl_ops = {
742 .read = do_sync_read,
743 .write = do_sync_write,
744 .aio_read = generic_file_aio_read,
745 .aio_write = cifs_file_aio_write,
747 .release = cifs_close,
750 .mmap = cifs_file_mmap,
751 .splice_read = generic_file_splice_read,
752 .llseek = cifs_llseek,
753 #ifdef CONFIG_CIFS_POSIX
754 .unlocked_ioctl = cifs_ioctl,
755 #endif /* CONFIG_CIFS_POSIX */
756 .setlease = cifs_setlease,
759 const struct file_operations cifs_file_direct_nobrl_ops = {
760 /* no mmap, no aio, no readv -
761 BB reevaluate whether they can be done with directio, no cache */
762 .read = cifs_user_read,
763 .write = cifs_user_write,
765 .release = cifs_close,
768 .mmap = cifs_file_mmap,
769 .splice_read = generic_file_splice_read,
770 #ifdef CONFIG_CIFS_POSIX
771 .unlocked_ioctl = cifs_ioctl,
772 #endif /* CONFIG_CIFS_POSIX */
773 .llseek = cifs_llseek,
774 .setlease = cifs_setlease,
777 const struct file_operations cifs_dir_ops = {
778 .readdir = cifs_readdir,
779 .release = cifs_closedir,
780 .read = generic_read_dir,
781 .unlocked_ioctl = cifs_ioctl,
782 .llseek = generic_file_llseek,
786 cifs_init_once(void *inode)
788 struct cifsInodeInfo *cifsi = inode;
790 inode_init_once(&cifsi->vfs_inode);
791 INIT_LIST_HEAD(&cifsi->lockList);
795 cifs_init_inodecache(void)
797 cifs_inode_cachep = kmem_cache_create("cifs_inode_cache",
798 sizeof(struct cifsInodeInfo),
799 0, (SLAB_RECLAIM_ACCOUNT|
802 if (cifs_inode_cachep == NULL)
809 cifs_destroy_inodecache(void)
811 kmem_cache_destroy(cifs_inode_cachep);
815 cifs_init_request_bufs(void)
817 if (CIFSMaxBufSize < 8192) {
818 /* Buffer size can not be smaller than 2 * PATH_MAX since maximum
819 Unicode path name has to fit in any SMB/CIFS path based frames */
820 CIFSMaxBufSize = 8192;
821 } else if (CIFSMaxBufSize > 1024*127) {
822 CIFSMaxBufSize = 1024 * 127;
824 CIFSMaxBufSize &= 0x1FE00; /* Round size to even 512 byte mult*/
826 /* cERROR(1, "CIFSMaxBufSize %d 0x%x",CIFSMaxBufSize,CIFSMaxBufSize); */
827 cifs_req_cachep = kmem_cache_create("cifs_request",
829 MAX_CIFS_HDR_SIZE, 0,
830 SLAB_HWCACHE_ALIGN, NULL);
831 if (cifs_req_cachep == NULL)
834 if (cifs_min_rcv < 1)
836 else if (cifs_min_rcv > 64) {
838 cERROR(1, "cifs_min_rcv set to maximum (64)");
841 cifs_req_poolp = mempool_create_slab_pool(cifs_min_rcv,
844 if (cifs_req_poolp == NULL) {
845 kmem_cache_destroy(cifs_req_cachep);
848 /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and
849 almost all handle based requests (but not write response, nor is it
850 sufficient for path based requests). A smaller size would have
851 been more efficient (compacting multiple slab items on one 4k page)
852 for the case in which debug was on, but this larger size allows
853 more SMBs to use small buffer alloc and is still much more
854 efficient to alloc 1 per page off the slab compared to 17K (5page)
855 alloc of large cifs buffers even when page debugging is on */
856 cifs_sm_req_cachep = kmem_cache_create("cifs_small_rq",
857 MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN,
859 if (cifs_sm_req_cachep == NULL) {
860 mempool_destroy(cifs_req_poolp);
861 kmem_cache_destroy(cifs_req_cachep);
865 if (cifs_min_small < 2)
867 else if (cifs_min_small > 256) {
868 cifs_min_small = 256;
869 cFYI(1, "cifs_min_small set to maximum (256)");
872 cifs_sm_req_poolp = mempool_create_slab_pool(cifs_min_small,
875 if (cifs_sm_req_poolp == NULL) {
876 mempool_destroy(cifs_req_poolp);
877 kmem_cache_destroy(cifs_req_cachep);
878 kmem_cache_destroy(cifs_sm_req_cachep);
886 cifs_destroy_request_bufs(void)
888 mempool_destroy(cifs_req_poolp);
889 kmem_cache_destroy(cifs_req_cachep);
890 mempool_destroy(cifs_sm_req_poolp);
891 kmem_cache_destroy(cifs_sm_req_cachep);
897 cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids",
898 sizeof(struct mid_q_entry), 0,
899 SLAB_HWCACHE_ALIGN, NULL);
900 if (cifs_mid_cachep == NULL)
903 /* 3 is a reasonable minimum number of simultaneous operations */
904 cifs_mid_poolp = mempool_create_slab_pool(3, cifs_mid_cachep);
905 if (cifs_mid_poolp == NULL) {
906 kmem_cache_destroy(cifs_mid_cachep);
914 cifs_destroy_mids(void)
916 mempool_destroy(cifs_mid_poolp);
917 kmem_cache_destroy(cifs_mid_cachep);
925 INIT_LIST_HEAD(&cifs_tcp_ses_list);
926 #ifdef CONFIG_CIFS_EXPERIMENTAL
927 INIT_LIST_HEAD(&GlobalDnotifyReqList);
928 INIT_LIST_HEAD(&GlobalDnotifyRsp_Q);
931 * Initialize Global counters
933 atomic_set(&sesInfoAllocCount, 0);
934 atomic_set(&tconInfoAllocCount, 0);
935 atomic_set(&tcpSesAllocCount, 0);
936 atomic_set(&tcpSesReconnectCount, 0);
937 atomic_set(&tconInfoReconnectCount, 0);
939 atomic_set(&bufAllocCount, 0);
940 atomic_set(&smBufAllocCount, 0);
941 #ifdef CONFIG_CIFS_STATS2
942 atomic_set(&totBufAllocCount, 0);
943 atomic_set(&totSmBufAllocCount, 0);
944 #endif /* CONFIG_CIFS_STATS2 */
946 atomic_set(&midCount, 0);
947 GlobalCurrentXid = 0;
948 GlobalTotalActiveXid = 0;
949 GlobalMaxActiveXid = 0;
950 spin_lock_init(&cifs_tcp_ses_lock);
951 spin_lock_init(&cifs_file_list_lock);
952 spin_lock_init(&GlobalMid_Lock);
954 if (cifs_max_pending < 2) {
955 cifs_max_pending = 2;
956 cFYI(1, "cifs_max_pending set to min of 2");
957 } else if (cifs_max_pending > 256) {
958 cifs_max_pending = 256;
959 cFYI(1, "cifs_max_pending set to max of 256");
962 rc = cifs_fscache_register();
966 rc = cifs_init_inodecache();
968 goto out_unreg_fscache;
970 rc = cifs_init_mids();
972 goto out_destroy_inodecache;
974 rc = cifs_init_request_bufs();
976 goto out_destroy_mids;
978 rc = register_filesystem(&cifs_fs_type);
980 goto out_destroy_request_bufs;
981 #ifdef CONFIG_CIFS_UPCALL
982 rc = register_key_type(&cifs_spnego_key_type);
984 goto out_unregister_filesystem;
989 #ifdef CONFIG_CIFS_UPCALL
990 out_unregister_filesystem:
991 unregister_filesystem(&cifs_fs_type);
993 out_destroy_request_bufs:
994 cifs_destroy_request_bufs();
997 out_destroy_inodecache:
998 cifs_destroy_inodecache();
1000 cifs_fscache_unregister();
1009 cFYI(DBG2, "exit_cifs");
1011 cifs_fscache_unregister();
1012 #ifdef CONFIG_CIFS_DFS_UPCALL
1013 cifs_dfs_release_automount_timer();
1015 #ifdef CONFIG_CIFS_UPCALL
1016 unregister_key_type(&cifs_spnego_key_type);
1018 unregister_filesystem(&cifs_fs_type);
1019 cifs_destroy_inodecache();
1020 cifs_destroy_mids();
1021 cifs_destroy_request_bufs();
1024 MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>");
1025 MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */
1027 ("VFS to access servers complying with the SNIA CIFS Specification "
1028 "e.g. Samba and Windows");
1029 MODULE_VERSION(CIFS_VERSION);
1030 module_init(init_cifs)
1031 module_exit(exit_cifs)