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");
80 unsigned short echo_retries = 5;
81 module_param(echo_retries, ushort, 0644);
82 MODULE_PARM_DESC(echo_retries, "Number of echo attempts before giving up and "
83 "reconnecting server. Default: 5. 0 means "
85 extern mempool_t *cifs_sm_req_poolp;
86 extern mempool_t *cifs_req_poolp;
87 extern mempool_t *cifs_mid_poolp;
90 cifs_sb_active(struct super_block *sb)
92 struct cifs_sb_info *server = CIFS_SB(sb);
94 if (atomic_inc_return(&server->active) == 1)
95 atomic_inc(&sb->s_active);
99 cifs_sb_deactive(struct super_block *sb)
101 struct cifs_sb_info *server = CIFS_SB(sb);
103 if (atomic_dec_and_test(&server->active))
104 deactivate_super(sb);
108 cifs_read_super(struct super_block *sb, void *data,
109 const char *devname, int silent)
112 struct cifs_sb_info *cifs_sb;
115 /* BB should we make this contingent on mount parm? */
116 sb->s_flags |= MS_NODIRATIME | MS_NOATIME;
117 sb->s_fs_info = kzalloc(sizeof(struct cifs_sb_info), GFP_KERNEL);
118 cifs_sb = CIFS_SB(sb);
122 spin_lock_init(&cifs_sb->tlink_tree_lock);
123 cifs_sb->tlink_tree = RB_ROOT;
125 rc = bdi_setup_and_register(&cifs_sb->bdi, "cifs", BDI_CAP_MAP_COPY);
131 #ifdef CONFIG_CIFS_DFS_UPCALL
132 /* copy mount params to sb for use in submounts */
133 /* BB: should we move this after the mount so we
134 * do not have to do the copy on failed mounts?
135 * BB: May be it is better to do simple copy before
136 * complex operation (mount), and in case of fail
137 * just exit instead of doing mount and attempting
138 * undo it if this copy fails?*/
140 int len = strlen(data);
141 cifs_sb->mountdata = kzalloc(len + 1, GFP_KERNEL);
142 if (cifs_sb->mountdata == NULL) {
143 bdi_destroy(&cifs_sb->bdi);
144 kfree(sb->s_fs_info);
145 sb->s_fs_info = NULL;
148 strncpy(cifs_sb->mountdata, data, len + 1);
149 cifs_sb->mountdata[len] = '\0';
153 rc = cifs_mount(sb, cifs_sb, data, devname);
157 cERROR(1, "cifs_mount failed w/return code = %d", rc);
158 goto out_mount_failed;
161 sb->s_magic = CIFS_MAGIC_NUMBER;
162 sb->s_op = &cifs_super_ops;
163 sb->s_bdi = &cifs_sb->bdi;
164 sb->s_blocksize = CIFS_MAX_MSGSIZE;
165 sb->s_blocksize_bits = 14; /* default 2**14 = CIFS_MAX_MSGSIZE */
166 inode = cifs_root_iget(sb, ROOT_I);
174 sb->s_root = d_alloc_root(inode);
181 /* do that *after* d_alloc_root() - we want NULL ->d_op for root here */
182 if (cifs_sb_master_tcon(cifs_sb)->nocase)
183 sb->s_d_op = &cifs_ci_dentry_ops;
185 sb->s_d_op = &cifs_dentry_ops;
187 #ifdef CONFIG_CIFS_EXPERIMENTAL
188 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
189 cFYI(1, "export ops supported");
190 sb->s_export_op = &cifs_export_ops;
192 #endif /* EXPERIMENTAL */
197 cERROR(1, "cifs_read_super: get root inode failed");
201 cifs_umount(sb, cifs_sb);
205 #ifdef CONFIG_CIFS_DFS_UPCALL
206 if (cifs_sb->mountdata) {
207 kfree(cifs_sb->mountdata);
208 cifs_sb->mountdata = NULL;
211 unload_nls(cifs_sb->local_nls);
212 bdi_destroy(&cifs_sb->bdi);
219 cifs_put_super(struct super_block *sb)
222 struct cifs_sb_info *cifs_sb;
224 cFYI(1, "In cifs_put_super");
225 cifs_sb = CIFS_SB(sb);
226 if (cifs_sb == NULL) {
227 cFYI(1, "Empty cifs superblock info passed to unmount");
231 rc = cifs_umount(sb, cifs_sb);
233 cERROR(1, "cifs_umount failed with return code %d", rc);
234 #ifdef CONFIG_CIFS_DFS_UPCALL
235 if (cifs_sb->mountdata) {
236 kfree(cifs_sb->mountdata);
237 cifs_sb->mountdata = NULL;
241 unload_nls(cifs_sb->local_nls);
242 bdi_destroy(&cifs_sb->bdi);
247 cifs_statfs(struct dentry *dentry, struct kstatfs *buf)
249 struct super_block *sb = dentry->d_sb;
250 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
251 struct cifsTconInfo *tcon = cifs_sb_master_tcon(cifs_sb);
252 int rc = -EOPNOTSUPP;
257 buf->f_type = CIFS_MAGIC_NUMBER;
260 * PATH_MAX may be too long - it would presumably be total path,
261 * but note that some servers (includinng Samba 3) have a shorter
264 * Instead could get the real value via SMB_QUERY_FS_ATTRIBUTE_INFO.
266 buf->f_namelen = PATH_MAX;
267 buf->f_files = 0; /* undefined */
268 buf->f_ffree = 0; /* unlimited */
271 * We could add a second check for a QFS Unix capability bit
273 if ((tcon->ses->capabilities & CAP_UNIX) &&
274 (CIFS_POSIX_EXTENSIONS & le64_to_cpu(tcon->fsUnixInfo.Capability)))
275 rc = CIFSSMBQFSPosixInfo(xid, tcon, buf);
278 * Only need to call the old QFSInfo if failed on newer one,
281 if (rc && (tcon->ses->capabilities & CAP_NT_SMBS))
282 rc = CIFSSMBQFSInfo(xid, tcon, buf);
285 * Some old Windows servers also do not support level 103, retry with
286 * older level one if old server failed the previous call or we
287 * bypassed it because we detected that this was an older LANMAN sess
290 rc = SMBOldQFSInfo(xid, tcon, buf);
296 static int cifs_permission(struct inode *inode, int mask, unsigned int flags)
298 struct cifs_sb_info *cifs_sb;
300 if (flags & IPERM_FLAG_RCU)
303 cifs_sb = CIFS_SB(inode->i_sb);
305 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) {
306 if ((mask & MAY_EXEC) && !execute_ok(inode))
310 } else /* file mode might have been restricted at mount time
311 on the client (above and beyond ACL on servers) for
312 servers which do not support setting and viewing mode bits,
313 so allowing client to check permissions is useful */
314 return generic_permission(inode, mask, flags, NULL);
317 static struct kmem_cache *cifs_inode_cachep;
318 static struct kmem_cache *cifs_req_cachep;
319 static struct kmem_cache *cifs_mid_cachep;
320 static struct kmem_cache *cifs_sm_req_cachep;
321 mempool_t *cifs_sm_req_poolp;
322 mempool_t *cifs_req_poolp;
323 mempool_t *cifs_mid_poolp;
325 static struct inode *
326 cifs_alloc_inode(struct super_block *sb)
328 struct cifsInodeInfo *cifs_inode;
329 cifs_inode = kmem_cache_alloc(cifs_inode_cachep, GFP_KERNEL);
332 cifs_inode->cifsAttrs = 0x20; /* default */
333 cifs_inode->time = 0;
334 /* Until the file is open and we have gotten oplock
335 info back from the server, can not assume caching of
336 file data or metadata */
337 cifs_set_oplock_level(cifs_inode, 0);
338 cifs_inode->delete_pending = false;
339 cifs_inode->invalid_mapping = false;
340 cifs_inode->vfs_inode.i_blkbits = 14; /* 2**14 = CIFS_MAX_MSGSIZE */
341 cifs_inode->server_eof = 0;
342 cifs_inode->uniqueid = 0;
343 cifs_inode->createtime = 0;
345 /* Can not set i_flags here - they get immediately overwritten
346 to zero by the VFS */
347 /* cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME;*/
348 INIT_LIST_HEAD(&cifs_inode->openFileList);
349 return &cifs_inode->vfs_inode;
352 static void cifs_i_callback(struct rcu_head *head)
354 struct inode *inode = container_of(head, struct inode, i_rcu);
355 INIT_LIST_HEAD(&inode->i_dentry);
356 kmem_cache_free(cifs_inode_cachep, CIFS_I(inode));
360 cifs_destroy_inode(struct inode *inode)
362 call_rcu(&inode->i_rcu, cifs_i_callback);
366 cifs_evict_inode(struct inode *inode)
368 truncate_inode_pages(&inode->i_data, 0);
369 end_writeback(inode);
370 cifs_fscache_release_inode_cookie(inode);
374 cifs_show_address(struct seq_file *s, struct TCP_Server_Info *server)
376 struct sockaddr_in *sa = (struct sockaddr_in *) &server->dstaddr;
377 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *) &server->dstaddr;
379 seq_printf(s, ",addr=");
381 switch (server->dstaddr.ss_family) {
383 seq_printf(s, "%pI4", &sa->sin_addr.s_addr);
386 seq_printf(s, "%pI6", &sa6->sin6_addr.s6_addr);
387 if (sa6->sin6_scope_id)
388 seq_printf(s, "%%%u", sa6->sin6_scope_id);
391 seq_printf(s, "(unknown)");
396 * cifs_show_options() is for displaying mount options in /proc/mounts.
397 * Not all settable options are displayed but most of the important
401 cifs_show_options(struct seq_file *s, struct vfsmount *m)
403 struct cifs_sb_info *cifs_sb = CIFS_SB(m->mnt_sb);
404 struct cifsTconInfo *tcon = cifs_sb_master_tcon(cifs_sb);
405 struct sockaddr *srcaddr;
406 srcaddr = (struct sockaddr *)&tcon->ses->server->srcaddr;
408 seq_printf(s, ",unc=%s", tcon->treeName);
410 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER)
411 seq_printf(s, ",multiuser");
412 else if (tcon->ses->userName)
413 seq_printf(s, ",username=%s", tcon->ses->userName);
415 if (tcon->ses->domainName)
416 seq_printf(s, ",domain=%s", tcon->ses->domainName);
418 if (srcaddr->sa_family != AF_UNSPEC) {
419 struct sockaddr_in *saddr4;
420 struct sockaddr_in6 *saddr6;
421 saddr4 = (struct sockaddr_in *)srcaddr;
422 saddr6 = (struct sockaddr_in6 *)srcaddr;
423 if (srcaddr->sa_family == AF_INET6)
424 seq_printf(s, ",srcaddr=%pI6c",
426 else if (srcaddr->sa_family == AF_INET)
427 seq_printf(s, ",srcaddr=%pI4",
428 &saddr4->sin_addr.s_addr);
430 seq_printf(s, ",srcaddr=BAD-AF:%i",
431 (int)(srcaddr->sa_family));
434 seq_printf(s, ",uid=%d", cifs_sb->mnt_uid);
435 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)
436 seq_printf(s, ",forceuid");
438 seq_printf(s, ",noforceuid");
440 seq_printf(s, ",gid=%d", cifs_sb->mnt_gid);
441 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)
442 seq_printf(s, ",forcegid");
444 seq_printf(s, ",noforcegid");
446 cifs_show_address(s, tcon->ses->server);
449 seq_printf(s, ",file_mode=0%o,dir_mode=0%o",
450 cifs_sb->mnt_file_mode,
451 cifs_sb->mnt_dir_mode);
453 seq_printf(s, ",seal");
455 seq_printf(s, ",nocase");
457 seq_printf(s, ",hard");
458 if (cifs_sb->prepath)
459 seq_printf(s, ",prepath=%s", cifs_sb->prepath);
460 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
461 seq_printf(s, ",posixpaths");
462 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)
463 seq_printf(s, ",setuids");
464 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
465 seq_printf(s, ",serverino");
466 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO)
467 seq_printf(s, ",directio");
468 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
469 seq_printf(s, ",nouser_xattr");
470 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR)
471 seq_printf(s, ",mapchars");
472 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)
473 seq_printf(s, ",sfu");
474 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
475 seq_printf(s, ",nobrl");
476 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
477 seq_printf(s, ",cifsacl");
478 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)
479 seq_printf(s, ",dynperm");
480 if (m->mnt_sb->s_flags & MS_POSIXACL)
481 seq_printf(s, ",acl");
482 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS)
483 seq_printf(s, ",mfsymlinks");
484 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_FSCACHE)
485 seq_printf(s, ",fsc");
487 seq_printf(s, ",rsize=%d", cifs_sb->rsize);
488 seq_printf(s, ",wsize=%d", cifs_sb->wsize);
489 /* convert actimeo and display it in seconds */
490 seq_printf(s, ",actimeo=%lu", cifs_sb->actimeo / HZ);
495 static void cifs_umount_begin(struct super_block *sb)
497 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
498 struct cifsTconInfo *tcon;
503 tcon = cifs_sb_master_tcon(cifs_sb);
505 spin_lock(&cifs_tcp_ses_lock);
506 if ((tcon->tc_count > 1) || (tcon->tidStatus == CifsExiting)) {
507 /* we have other mounts to same share or we have
508 already tried to force umount this and woken up
509 all waiting network requests, nothing to do */
510 spin_unlock(&cifs_tcp_ses_lock);
512 } else if (tcon->tc_count == 1)
513 tcon->tidStatus = CifsExiting;
514 spin_unlock(&cifs_tcp_ses_lock);
516 /* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */
517 /* cancel_notify_requests(tcon); */
518 if (tcon->ses && tcon->ses->server) {
519 cFYI(1, "wake up tasks now - umount begin not complete");
520 wake_up_all(&tcon->ses->server->request_q);
521 wake_up_all(&tcon->ses->server->response_q);
522 msleep(1); /* yield */
523 /* we have to kick the requests once more */
524 wake_up_all(&tcon->ses->server->response_q);
531 #ifdef CONFIG_CIFS_STATS2
532 static int cifs_show_stats(struct seq_file *s, struct vfsmount *mnt)
539 static int cifs_remount(struct super_block *sb, int *flags, char *data)
541 *flags |= MS_NODIRATIME;
545 static int cifs_drop_inode(struct inode *inode)
547 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
549 /* no serverino => unconditional eviction */
550 return !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) ||
551 generic_drop_inode(inode);
554 static const struct super_operations cifs_super_ops = {
555 .put_super = cifs_put_super,
556 .statfs = cifs_statfs,
557 .alloc_inode = cifs_alloc_inode,
558 .destroy_inode = cifs_destroy_inode,
559 .drop_inode = cifs_drop_inode,
560 .evict_inode = cifs_evict_inode,
561 /* .delete_inode = cifs_delete_inode, */ /* Do not need above
562 function unless later we add lazy close of inodes or unless the
563 kernel forgets to call us with the same number of releases (closes)
565 .show_options = cifs_show_options,
566 .umount_begin = cifs_umount_begin,
567 .remount_fs = cifs_remount,
568 #ifdef CONFIG_CIFS_STATS2
569 .show_stats = cifs_show_stats,
573 static struct dentry *
574 cifs_do_mount(struct file_system_type *fs_type,
575 int flags, const char *dev_name, void *data)
578 struct super_block *sb;
580 sb = sget(fs_type, NULL, set_anon_super, NULL);
582 cFYI(1, "Devname: %s flags: %d ", dev_name, flags);
589 rc = cifs_read_super(sb, data, dev_name, flags & MS_SILENT ? 1 : 0);
591 deactivate_locked_super(sb);
594 sb->s_flags |= MS_ACTIVE;
595 return dget(sb->s_root);
598 static ssize_t cifs_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
599 unsigned long nr_segs, loff_t pos)
601 struct inode *inode = iocb->ki_filp->f_path.dentry->d_inode;
604 written = generic_file_aio_write(iocb, iov, nr_segs, pos);
605 if (!CIFS_I(inode)->clientCanCacheAll)
606 filemap_fdatawrite(inode->i_mapping);
610 static loff_t cifs_llseek(struct file *file, loff_t offset, int origin)
612 /* origin == SEEK_END => we must revalidate the cached file length */
613 if (origin == SEEK_END) {
616 /* some applications poll for the file length in this strange
617 way so we must seek to end on non-oplocked files by
618 setting the revalidate time to zero */
619 CIFS_I(file->f_path.dentry->d_inode)->time = 0;
621 retval = cifs_revalidate_file(file);
623 return (loff_t)retval;
625 return generic_file_llseek_unlocked(file, offset, origin);
628 static int cifs_setlease(struct file *file, long arg, struct file_lock **lease)
630 /* note that this is called by vfs setlease with lock_flocks held
631 to protect *lease from going away */
632 struct inode *inode = file->f_path.dentry->d_inode;
633 struct cifsFileInfo *cfile = file->private_data;
635 if (!(S_ISREG(inode->i_mode)))
638 /* check if file is oplocked */
639 if (((arg == F_RDLCK) &&
640 (CIFS_I(inode)->clientCanCacheRead)) ||
642 (CIFS_I(inode)->clientCanCacheAll)))
643 return generic_setlease(file, arg, lease);
644 else if (tlink_tcon(cfile->tlink)->local_lease &&
645 !CIFS_I(inode)->clientCanCacheRead)
646 /* If the server claims to support oplock on this
647 file, then we still need to check oplock even
648 if the local_lease mount option is set, but there
649 are servers which do not support oplock for which
650 this mount option may be useful if the user
651 knows that the file won't be changed on the server
653 return generic_setlease(file, arg, lease);
658 struct file_system_type cifs_fs_type = {
659 .owner = THIS_MODULE,
661 .mount = cifs_do_mount,
662 .kill_sb = kill_anon_super,
665 const struct inode_operations cifs_dir_inode_ops = {
666 .create = cifs_create,
667 .lookup = cifs_lookup,
668 .getattr = cifs_getattr,
669 .unlink = cifs_unlink,
670 .link = cifs_hardlink,
673 .rename = cifs_rename,
674 .permission = cifs_permission,
675 /* revalidate:cifs_revalidate, */
676 .setattr = cifs_setattr,
677 .symlink = cifs_symlink,
679 #ifdef CONFIG_CIFS_XATTR
680 .setxattr = cifs_setxattr,
681 .getxattr = cifs_getxattr,
682 .listxattr = cifs_listxattr,
683 .removexattr = cifs_removexattr,
687 const struct inode_operations cifs_file_inode_ops = {
688 /* revalidate:cifs_revalidate, */
689 .setattr = cifs_setattr,
690 .getattr = cifs_getattr, /* do we need this anymore? */
691 .rename = cifs_rename,
692 .permission = cifs_permission,
693 #ifdef CONFIG_CIFS_XATTR
694 .setxattr = cifs_setxattr,
695 .getxattr = cifs_getxattr,
696 .listxattr = cifs_listxattr,
697 .removexattr = cifs_removexattr,
701 const struct inode_operations cifs_symlink_inode_ops = {
702 .readlink = generic_readlink,
703 .follow_link = cifs_follow_link,
704 .put_link = cifs_put_link,
705 .permission = cifs_permission,
706 /* BB add the following two eventually */
707 /* revalidate: cifs_revalidate,
708 setattr: cifs_notify_change, *//* BB do we need notify change */
709 #ifdef CONFIG_CIFS_XATTR
710 .setxattr = cifs_setxattr,
711 .getxattr = cifs_getxattr,
712 .listxattr = cifs_listxattr,
713 .removexattr = cifs_removexattr,
717 const struct file_operations cifs_file_ops = {
718 .read = do_sync_read,
719 .write = do_sync_write,
720 .aio_read = generic_file_aio_read,
721 .aio_write = cifs_file_aio_write,
723 .release = cifs_close,
727 .mmap = cifs_file_mmap,
728 .splice_read = generic_file_splice_read,
729 .llseek = cifs_llseek,
730 #ifdef CONFIG_CIFS_POSIX
731 .unlocked_ioctl = cifs_ioctl,
732 #endif /* CONFIG_CIFS_POSIX */
733 .setlease = cifs_setlease,
736 const struct file_operations cifs_file_direct_ops = {
737 /* no aio, no readv -
738 BB reevaluate whether they can be done with directio, no cache */
739 .read = cifs_user_read,
740 .write = cifs_user_write,
742 .release = cifs_close,
746 .mmap = cifs_file_mmap,
747 .splice_read = generic_file_splice_read,
748 #ifdef CONFIG_CIFS_POSIX
749 .unlocked_ioctl = cifs_ioctl,
750 #endif /* CONFIG_CIFS_POSIX */
751 .llseek = cifs_llseek,
752 .setlease = cifs_setlease,
754 const struct file_operations cifs_file_nobrl_ops = {
755 .read = do_sync_read,
756 .write = do_sync_write,
757 .aio_read = generic_file_aio_read,
758 .aio_write = cifs_file_aio_write,
760 .release = cifs_close,
763 .mmap = cifs_file_mmap,
764 .splice_read = generic_file_splice_read,
765 .llseek = cifs_llseek,
766 #ifdef CONFIG_CIFS_POSIX
767 .unlocked_ioctl = cifs_ioctl,
768 #endif /* CONFIG_CIFS_POSIX */
769 .setlease = cifs_setlease,
772 const struct file_operations cifs_file_direct_nobrl_ops = {
773 /* no mmap, no aio, no readv -
774 BB reevaluate whether they can be done with directio, no cache */
775 .read = cifs_user_read,
776 .write = cifs_user_write,
778 .release = cifs_close,
781 .mmap = cifs_file_mmap,
782 .splice_read = generic_file_splice_read,
783 #ifdef CONFIG_CIFS_POSIX
784 .unlocked_ioctl = cifs_ioctl,
785 #endif /* CONFIG_CIFS_POSIX */
786 .llseek = cifs_llseek,
787 .setlease = cifs_setlease,
790 const struct file_operations cifs_dir_ops = {
791 .readdir = cifs_readdir,
792 .release = cifs_closedir,
793 .read = generic_read_dir,
794 .unlocked_ioctl = cifs_ioctl,
795 .llseek = generic_file_llseek,
799 cifs_init_once(void *inode)
801 struct cifsInodeInfo *cifsi = inode;
803 inode_init_once(&cifsi->vfs_inode);
804 INIT_LIST_HEAD(&cifsi->lockList);
808 cifs_init_inodecache(void)
810 cifs_inode_cachep = kmem_cache_create("cifs_inode_cache",
811 sizeof(struct cifsInodeInfo),
812 0, (SLAB_RECLAIM_ACCOUNT|
815 if (cifs_inode_cachep == NULL)
822 cifs_destroy_inodecache(void)
824 kmem_cache_destroy(cifs_inode_cachep);
828 cifs_init_request_bufs(void)
830 if (CIFSMaxBufSize < 8192) {
831 /* Buffer size can not be smaller than 2 * PATH_MAX since maximum
832 Unicode path name has to fit in any SMB/CIFS path based frames */
833 CIFSMaxBufSize = 8192;
834 } else if (CIFSMaxBufSize > 1024*127) {
835 CIFSMaxBufSize = 1024 * 127;
837 CIFSMaxBufSize &= 0x1FE00; /* Round size to even 512 byte mult*/
839 /* cERROR(1, "CIFSMaxBufSize %d 0x%x",CIFSMaxBufSize,CIFSMaxBufSize); */
840 cifs_req_cachep = kmem_cache_create("cifs_request",
842 MAX_CIFS_HDR_SIZE, 0,
843 SLAB_HWCACHE_ALIGN, NULL);
844 if (cifs_req_cachep == NULL)
847 if (cifs_min_rcv < 1)
849 else if (cifs_min_rcv > 64) {
851 cERROR(1, "cifs_min_rcv set to maximum (64)");
854 cifs_req_poolp = mempool_create_slab_pool(cifs_min_rcv,
857 if (cifs_req_poolp == NULL) {
858 kmem_cache_destroy(cifs_req_cachep);
861 /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and
862 almost all handle based requests (but not write response, nor is it
863 sufficient for path based requests). A smaller size would have
864 been more efficient (compacting multiple slab items on one 4k page)
865 for the case in which debug was on, but this larger size allows
866 more SMBs to use small buffer alloc and is still much more
867 efficient to alloc 1 per page off the slab compared to 17K (5page)
868 alloc of large cifs buffers even when page debugging is on */
869 cifs_sm_req_cachep = kmem_cache_create("cifs_small_rq",
870 MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN,
872 if (cifs_sm_req_cachep == NULL) {
873 mempool_destroy(cifs_req_poolp);
874 kmem_cache_destroy(cifs_req_cachep);
878 if (cifs_min_small < 2)
880 else if (cifs_min_small > 256) {
881 cifs_min_small = 256;
882 cFYI(1, "cifs_min_small set to maximum (256)");
885 cifs_sm_req_poolp = mempool_create_slab_pool(cifs_min_small,
888 if (cifs_sm_req_poolp == NULL) {
889 mempool_destroy(cifs_req_poolp);
890 kmem_cache_destroy(cifs_req_cachep);
891 kmem_cache_destroy(cifs_sm_req_cachep);
899 cifs_destroy_request_bufs(void)
901 mempool_destroy(cifs_req_poolp);
902 kmem_cache_destroy(cifs_req_cachep);
903 mempool_destroy(cifs_sm_req_poolp);
904 kmem_cache_destroy(cifs_sm_req_cachep);
910 cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids",
911 sizeof(struct mid_q_entry), 0,
912 SLAB_HWCACHE_ALIGN, NULL);
913 if (cifs_mid_cachep == NULL)
916 /* 3 is a reasonable minimum number of simultaneous operations */
917 cifs_mid_poolp = mempool_create_slab_pool(3, cifs_mid_cachep);
918 if (cifs_mid_poolp == NULL) {
919 kmem_cache_destroy(cifs_mid_cachep);
927 cifs_destroy_mids(void)
929 mempool_destroy(cifs_mid_poolp);
930 kmem_cache_destroy(cifs_mid_cachep);
938 INIT_LIST_HEAD(&cifs_tcp_ses_list);
939 #ifdef CONFIG_CIFS_EXPERIMENTAL
940 INIT_LIST_HEAD(&GlobalDnotifyReqList);
941 INIT_LIST_HEAD(&GlobalDnotifyRsp_Q);
944 * Initialize Global counters
946 atomic_set(&sesInfoAllocCount, 0);
947 atomic_set(&tconInfoAllocCount, 0);
948 atomic_set(&tcpSesAllocCount, 0);
949 atomic_set(&tcpSesReconnectCount, 0);
950 atomic_set(&tconInfoReconnectCount, 0);
952 atomic_set(&bufAllocCount, 0);
953 atomic_set(&smBufAllocCount, 0);
954 #ifdef CONFIG_CIFS_STATS2
955 atomic_set(&totBufAllocCount, 0);
956 atomic_set(&totSmBufAllocCount, 0);
957 #endif /* CONFIG_CIFS_STATS2 */
959 atomic_set(&midCount, 0);
960 GlobalCurrentXid = 0;
961 GlobalTotalActiveXid = 0;
962 GlobalMaxActiveXid = 0;
963 spin_lock_init(&cifs_tcp_ses_lock);
964 spin_lock_init(&cifs_file_list_lock);
965 spin_lock_init(&GlobalMid_Lock);
967 if (cifs_max_pending < 2) {
968 cifs_max_pending = 2;
969 cFYI(1, "cifs_max_pending set to min of 2");
970 } else if (cifs_max_pending > 256) {
971 cifs_max_pending = 256;
972 cFYI(1, "cifs_max_pending set to max of 256");
975 rc = cifs_fscache_register();
979 rc = cifs_init_inodecache();
981 goto out_unreg_fscache;
983 rc = cifs_init_mids();
985 goto out_destroy_inodecache;
987 rc = cifs_init_request_bufs();
989 goto out_destroy_mids;
991 rc = register_filesystem(&cifs_fs_type);
993 goto out_destroy_request_bufs;
994 #ifdef CONFIG_CIFS_UPCALL
995 rc = register_key_type(&cifs_spnego_key_type);
997 goto out_unregister_filesystem;
1002 #ifdef CONFIG_CIFS_UPCALL
1003 out_unregister_filesystem:
1004 unregister_filesystem(&cifs_fs_type);
1006 out_destroy_request_bufs:
1007 cifs_destroy_request_bufs();
1009 cifs_destroy_mids();
1010 out_destroy_inodecache:
1011 cifs_destroy_inodecache();
1013 cifs_fscache_unregister();
1022 cFYI(DBG2, "exit_cifs");
1024 cifs_fscache_unregister();
1025 #ifdef CONFIG_CIFS_DFS_UPCALL
1026 cifs_dfs_release_automount_timer();
1028 #ifdef CONFIG_CIFS_UPCALL
1029 unregister_key_type(&cifs_spnego_key_type);
1031 unregister_filesystem(&cifs_fs_type);
1032 cifs_destroy_inodecache();
1033 cifs_destroy_mids();
1034 cifs_destroy_request_bufs();
1037 MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>");
1038 MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */
1040 ("VFS to access servers complying with the SNIA CIFS Specification "
1041 "e.g. Samba and Windows");
1042 MODULE_VERSION(CIFS_VERSION);
1043 module_init(init_cifs)
1044 module_exit(exit_cifs)