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)
288 struct cifs_sb_info *cifs_sb;
290 cifs_sb = CIFS_SB(inode->i_sb);
292 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) {
293 if ((mask & MAY_EXEC) && !execute_ok(inode))
297 } else /* file mode might have been restricted at mount time
298 on the client (above and beyond ACL on servers) for
299 servers which do not support setting and viewing mode bits,
300 so allowing client to check permissions is useful */
301 return generic_permission(inode, mask, NULL);
304 static struct kmem_cache *cifs_inode_cachep;
305 static struct kmem_cache *cifs_req_cachep;
306 static struct kmem_cache *cifs_mid_cachep;
307 static struct kmem_cache *cifs_sm_req_cachep;
308 mempool_t *cifs_sm_req_poolp;
309 mempool_t *cifs_req_poolp;
310 mempool_t *cifs_mid_poolp;
312 static struct inode *
313 cifs_alloc_inode(struct super_block *sb)
315 struct cifsInodeInfo *cifs_inode;
316 cifs_inode = kmem_cache_alloc(cifs_inode_cachep, GFP_KERNEL);
319 cifs_inode->cifsAttrs = 0x20; /* default */
320 cifs_inode->time = 0;
321 /* Until the file is open and we have gotten oplock
322 info back from the server, can not assume caching of
323 file data or metadata */
324 cifs_set_oplock_level(cifs_inode, 0);
325 cifs_inode->delete_pending = false;
326 cifs_inode->invalid_mapping = false;
327 cifs_inode->vfs_inode.i_blkbits = 14; /* 2**14 = CIFS_MAX_MSGSIZE */
328 cifs_inode->server_eof = 0;
330 /* Can not set i_flags here - they get immediately overwritten
331 to zero by the VFS */
332 /* cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME;*/
333 INIT_LIST_HEAD(&cifs_inode->openFileList);
334 return &cifs_inode->vfs_inode;
337 static void cifs_i_callback(struct rcu_head *head)
339 struct inode *inode = container_of(head, struct inode, i_rcu);
340 INIT_LIST_HEAD(&inode->i_dentry);
341 kmem_cache_free(cifs_inode_cachep, CIFS_I(inode));
345 cifs_destroy_inode(struct inode *inode)
347 call_rcu(&inode->i_rcu, cifs_i_callback);
351 cifs_evict_inode(struct inode *inode)
353 truncate_inode_pages(&inode->i_data, 0);
354 end_writeback(inode);
355 cifs_fscache_release_inode_cookie(inode);
359 cifs_show_address(struct seq_file *s, struct TCP_Server_Info *server)
361 seq_printf(s, ",addr=");
363 switch (server->addr.sockAddr.sin_family) {
365 seq_printf(s, "%pI4", &server->addr.sockAddr.sin_addr.s_addr);
368 seq_printf(s, "%pI6",
369 &server->addr.sockAddr6.sin6_addr.s6_addr);
370 if (server->addr.sockAddr6.sin6_scope_id)
371 seq_printf(s, "%%%u",
372 server->addr.sockAddr6.sin6_scope_id);
375 seq_printf(s, "(unknown)");
380 * cifs_show_options() is for displaying mount options in /proc/mounts.
381 * Not all settable options are displayed but most of the important
385 cifs_show_options(struct seq_file *s, struct vfsmount *m)
387 struct cifs_sb_info *cifs_sb = CIFS_SB(m->mnt_sb);
388 struct cifsTconInfo *tcon = cifs_sb_master_tcon(cifs_sb);
389 struct sockaddr *srcaddr;
390 srcaddr = (struct sockaddr *)&tcon->ses->server->srcaddr;
392 seq_printf(s, ",unc=%s", tcon->treeName);
394 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER)
395 seq_printf(s, ",multiuser");
396 else if (tcon->ses->userName)
397 seq_printf(s, ",username=%s", tcon->ses->userName);
399 if (tcon->ses->domainName)
400 seq_printf(s, ",domain=%s", tcon->ses->domainName);
402 if (srcaddr->sa_family != AF_UNSPEC) {
403 struct sockaddr_in *saddr4;
404 struct sockaddr_in6 *saddr6;
405 saddr4 = (struct sockaddr_in *)srcaddr;
406 saddr6 = (struct sockaddr_in6 *)srcaddr;
407 if (srcaddr->sa_family == AF_INET6)
408 seq_printf(s, ",srcaddr=%pI6c",
410 else if (srcaddr->sa_family == AF_INET)
411 seq_printf(s, ",srcaddr=%pI4",
412 &saddr4->sin_addr.s_addr);
414 seq_printf(s, ",srcaddr=BAD-AF:%i",
415 (int)(srcaddr->sa_family));
418 seq_printf(s, ",uid=%d", cifs_sb->mnt_uid);
419 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)
420 seq_printf(s, ",forceuid");
422 seq_printf(s, ",noforceuid");
424 seq_printf(s, ",gid=%d", cifs_sb->mnt_gid);
425 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)
426 seq_printf(s, ",forcegid");
428 seq_printf(s, ",noforcegid");
430 cifs_show_address(s, tcon->ses->server);
433 seq_printf(s, ",file_mode=0%o,dir_mode=0%o",
434 cifs_sb->mnt_file_mode,
435 cifs_sb->mnt_dir_mode);
437 seq_printf(s, ",seal");
439 seq_printf(s, ",nocase");
441 seq_printf(s, ",hard");
442 if (cifs_sb->prepath)
443 seq_printf(s, ",prepath=%s", cifs_sb->prepath);
444 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
445 seq_printf(s, ",posixpaths");
446 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)
447 seq_printf(s, ",setuids");
448 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
449 seq_printf(s, ",serverino");
450 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO)
451 seq_printf(s, ",directio");
452 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
453 seq_printf(s, ",nouser_xattr");
454 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR)
455 seq_printf(s, ",mapchars");
456 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)
457 seq_printf(s, ",sfu");
458 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
459 seq_printf(s, ",nobrl");
460 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
461 seq_printf(s, ",cifsacl");
462 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)
463 seq_printf(s, ",dynperm");
464 if (m->mnt_sb->s_flags & MS_POSIXACL)
465 seq_printf(s, ",acl");
466 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS)
467 seq_printf(s, ",mfsymlinks");
468 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_FSCACHE)
469 seq_printf(s, ",fsc");
471 seq_printf(s, ",rsize=%d", cifs_sb->rsize);
472 seq_printf(s, ",wsize=%d", cifs_sb->wsize);
473 /* convert actimeo and display it in seconds */
474 seq_printf(s, ",actimeo=%lu", cifs_sb->actimeo / HZ);
479 static void cifs_umount_begin(struct super_block *sb)
481 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
482 struct cifsTconInfo *tcon;
487 tcon = cifs_sb_master_tcon(cifs_sb);
489 spin_lock(&cifs_tcp_ses_lock);
490 if ((tcon->tc_count > 1) || (tcon->tidStatus == CifsExiting)) {
491 /* we have other mounts to same share or we have
492 already tried to force umount this and woken up
493 all waiting network requests, nothing to do */
494 spin_unlock(&cifs_tcp_ses_lock);
496 } else if (tcon->tc_count == 1)
497 tcon->tidStatus = CifsExiting;
498 spin_unlock(&cifs_tcp_ses_lock);
500 /* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */
501 /* cancel_notify_requests(tcon); */
502 if (tcon->ses && tcon->ses->server) {
503 cFYI(1, "wake up tasks now - umount begin not complete");
504 wake_up_all(&tcon->ses->server->request_q);
505 wake_up_all(&tcon->ses->server->response_q);
506 msleep(1); /* yield */
507 /* we have to kick the requests once more */
508 wake_up_all(&tcon->ses->server->response_q);
515 #ifdef CONFIG_CIFS_STATS2
516 static int cifs_show_stats(struct seq_file *s, struct vfsmount *mnt)
523 static int cifs_remount(struct super_block *sb, int *flags, char *data)
525 *flags |= MS_NODIRATIME;
529 static int cifs_drop_inode(struct inode *inode)
531 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
533 /* no serverino => unconditional eviction */
534 return !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) ||
535 generic_drop_inode(inode);
538 static const struct super_operations cifs_super_ops = {
539 .put_super = cifs_put_super,
540 .statfs = cifs_statfs,
541 .alloc_inode = cifs_alloc_inode,
542 .destroy_inode = cifs_destroy_inode,
543 .drop_inode = cifs_drop_inode,
544 .evict_inode = cifs_evict_inode,
545 /* .delete_inode = cifs_delete_inode, */ /* Do not need above
546 function unless later we add lazy close of inodes or unless the
547 kernel forgets to call us with the same number of releases (closes)
549 .show_options = cifs_show_options,
550 .umount_begin = cifs_umount_begin,
551 .remount_fs = cifs_remount,
552 #ifdef CONFIG_CIFS_STATS2
553 .show_stats = cifs_show_stats,
557 static struct dentry *
558 cifs_do_mount(struct file_system_type *fs_type,
559 int flags, const char *dev_name, void *data)
562 struct super_block *sb;
564 sb = sget(fs_type, NULL, set_anon_super, NULL);
566 cFYI(1, "Devname: %s flags: %d ", dev_name, flags);
573 rc = cifs_read_super(sb, data, dev_name, flags & MS_SILENT ? 1 : 0);
575 deactivate_locked_super(sb);
578 sb->s_flags |= MS_ACTIVE;
579 return dget(sb->s_root);
582 static ssize_t cifs_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
583 unsigned long nr_segs, loff_t pos)
585 struct inode *inode = iocb->ki_filp->f_path.dentry->d_inode;
588 written = generic_file_aio_write(iocb, iov, nr_segs, pos);
589 if (!CIFS_I(inode)->clientCanCacheAll)
590 filemap_fdatawrite(inode->i_mapping);
594 static loff_t cifs_llseek(struct file *file, loff_t offset, int origin)
596 /* origin == SEEK_END => we must revalidate the cached file length */
597 if (origin == SEEK_END) {
600 /* some applications poll for the file length in this strange
601 way so we must seek to end on non-oplocked files by
602 setting the revalidate time to zero */
603 CIFS_I(file->f_path.dentry->d_inode)->time = 0;
605 retval = cifs_revalidate_file(file);
607 return (loff_t)retval;
609 return generic_file_llseek_unlocked(file, offset, origin);
612 static int cifs_setlease(struct file *file, long arg, struct file_lock **lease)
614 /* note that this is called by vfs setlease with lock_flocks held
615 to protect *lease from going away */
616 struct inode *inode = file->f_path.dentry->d_inode;
617 struct cifsFileInfo *cfile = file->private_data;
619 if (!(S_ISREG(inode->i_mode)))
622 /* check if file is oplocked */
623 if (((arg == F_RDLCK) &&
624 (CIFS_I(inode)->clientCanCacheRead)) ||
626 (CIFS_I(inode)->clientCanCacheAll)))
627 return generic_setlease(file, arg, lease);
628 else if (tlink_tcon(cfile->tlink)->local_lease &&
629 !CIFS_I(inode)->clientCanCacheRead)
630 /* If the server claims to support oplock on this
631 file, then we still need to check oplock even
632 if the local_lease mount option is set, but there
633 are servers which do not support oplock for which
634 this mount option may be useful if the user
635 knows that the file won't be changed on the server
637 return generic_setlease(file, arg, lease);
642 struct file_system_type cifs_fs_type = {
643 .owner = THIS_MODULE,
645 .mount = cifs_do_mount,
646 .kill_sb = kill_anon_super,
649 const struct inode_operations cifs_dir_inode_ops = {
650 .create = cifs_create,
651 .lookup = cifs_lookup,
652 .getattr = cifs_getattr,
653 .unlink = cifs_unlink,
654 .link = cifs_hardlink,
657 .rename = cifs_rename,
658 .permission = cifs_permission,
659 /* revalidate:cifs_revalidate, */
660 .setattr = cifs_setattr,
661 .symlink = cifs_symlink,
663 #ifdef CONFIG_CIFS_XATTR
664 .setxattr = cifs_setxattr,
665 .getxattr = cifs_getxattr,
666 .listxattr = cifs_listxattr,
667 .removexattr = cifs_removexattr,
671 const struct inode_operations cifs_file_inode_ops = {
672 /* revalidate:cifs_revalidate, */
673 .setattr = cifs_setattr,
674 .getattr = cifs_getattr, /* do we need this anymore? */
675 .rename = cifs_rename,
676 .permission = cifs_permission,
677 #ifdef CONFIG_CIFS_XATTR
678 .setxattr = cifs_setxattr,
679 .getxattr = cifs_getxattr,
680 .listxattr = cifs_listxattr,
681 .removexattr = cifs_removexattr,
685 const struct inode_operations cifs_symlink_inode_ops = {
686 .readlink = generic_readlink,
687 .follow_link = cifs_follow_link,
688 .put_link = cifs_put_link,
689 .permission = cifs_permission,
690 /* BB add the following two eventually */
691 /* revalidate: cifs_revalidate,
692 setattr: cifs_notify_change, *//* BB do we need notify change */
693 #ifdef CONFIG_CIFS_XATTR
694 .setxattr = cifs_setxattr,
695 .getxattr = cifs_getxattr,
696 .listxattr = cifs_listxattr,
697 .removexattr = cifs_removexattr,
701 const struct file_operations cifs_file_ops = {
702 .read = do_sync_read,
703 .write = do_sync_write,
704 .aio_read = generic_file_aio_read,
705 .aio_write = cifs_file_aio_write,
707 .release = cifs_close,
711 .mmap = cifs_file_mmap,
712 .splice_read = generic_file_splice_read,
713 .llseek = cifs_llseek,
714 #ifdef CONFIG_CIFS_POSIX
715 .unlocked_ioctl = cifs_ioctl,
716 #endif /* CONFIG_CIFS_POSIX */
717 .setlease = cifs_setlease,
720 const struct file_operations cifs_file_direct_ops = {
721 /* no aio, no readv -
722 BB reevaluate whether they can be done with directio, no cache */
723 .read = cifs_user_read,
724 .write = cifs_user_write,
726 .release = cifs_close,
730 .mmap = cifs_file_mmap,
731 .splice_read = generic_file_splice_read,
732 #ifdef CONFIG_CIFS_POSIX
733 .unlocked_ioctl = cifs_ioctl,
734 #endif /* CONFIG_CIFS_POSIX */
735 .llseek = cifs_llseek,
736 .setlease = cifs_setlease,
738 const struct file_operations cifs_file_nobrl_ops = {
739 .read = do_sync_read,
740 .write = do_sync_write,
741 .aio_read = generic_file_aio_read,
742 .aio_write = cifs_file_aio_write,
744 .release = cifs_close,
747 .mmap = cifs_file_mmap,
748 .splice_read = generic_file_splice_read,
749 .llseek = cifs_llseek,
750 #ifdef CONFIG_CIFS_POSIX
751 .unlocked_ioctl = cifs_ioctl,
752 #endif /* CONFIG_CIFS_POSIX */
753 .setlease = cifs_setlease,
756 const struct file_operations cifs_file_direct_nobrl_ops = {
757 /* no mmap, no aio, no readv -
758 BB reevaluate whether they can be done with directio, no cache */
759 .read = cifs_user_read,
760 .write = cifs_user_write,
762 .release = cifs_close,
765 .mmap = cifs_file_mmap,
766 .splice_read = generic_file_splice_read,
767 #ifdef CONFIG_CIFS_POSIX
768 .unlocked_ioctl = cifs_ioctl,
769 #endif /* CONFIG_CIFS_POSIX */
770 .llseek = cifs_llseek,
771 .setlease = cifs_setlease,
774 const struct file_operations cifs_dir_ops = {
775 .readdir = cifs_readdir,
776 .release = cifs_closedir,
777 .read = generic_read_dir,
778 .unlocked_ioctl = cifs_ioctl,
779 .llseek = generic_file_llseek,
783 cifs_init_once(void *inode)
785 struct cifsInodeInfo *cifsi = inode;
787 inode_init_once(&cifsi->vfs_inode);
788 INIT_LIST_HEAD(&cifsi->lockList);
792 cifs_init_inodecache(void)
794 cifs_inode_cachep = kmem_cache_create("cifs_inode_cache",
795 sizeof(struct cifsInodeInfo),
796 0, (SLAB_RECLAIM_ACCOUNT|
799 if (cifs_inode_cachep == NULL)
806 cifs_destroy_inodecache(void)
808 kmem_cache_destroy(cifs_inode_cachep);
812 cifs_init_request_bufs(void)
814 if (CIFSMaxBufSize < 8192) {
815 /* Buffer size can not be smaller than 2 * PATH_MAX since maximum
816 Unicode path name has to fit in any SMB/CIFS path based frames */
817 CIFSMaxBufSize = 8192;
818 } else if (CIFSMaxBufSize > 1024*127) {
819 CIFSMaxBufSize = 1024 * 127;
821 CIFSMaxBufSize &= 0x1FE00; /* Round size to even 512 byte mult*/
823 /* cERROR(1, "CIFSMaxBufSize %d 0x%x",CIFSMaxBufSize,CIFSMaxBufSize); */
824 cifs_req_cachep = kmem_cache_create("cifs_request",
826 MAX_CIFS_HDR_SIZE, 0,
827 SLAB_HWCACHE_ALIGN, NULL);
828 if (cifs_req_cachep == NULL)
831 if (cifs_min_rcv < 1)
833 else if (cifs_min_rcv > 64) {
835 cERROR(1, "cifs_min_rcv set to maximum (64)");
838 cifs_req_poolp = mempool_create_slab_pool(cifs_min_rcv,
841 if (cifs_req_poolp == NULL) {
842 kmem_cache_destroy(cifs_req_cachep);
845 /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and
846 almost all handle based requests (but not write response, nor is it
847 sufficient for path based requests). A smaller size would have
848 been more efficient (compacting multiple slab items on one 4k page)
849 for the case in which debug was on, but this larger size allows
850 more SMBs to use small buffer alloc and is still much more
851 efficient to alloc 1 per page off the slab compared to 17K (5page)
852 alloc of large cifs buffers even when page debugging is on */
853 cifs_sm_req_cachep = kmem_cache_create("cifs_small_rq",
854 MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN,
856 if (cifs_sm_req_cachep == NULL) {
857 mempool_destroy(cifs_req_poolp);
858 kmem_cache_destroy(cifs_req_cachep);
862 if (cifs_min_small < 2)
864 else if (cifs_min_small > 256) {
865 cifs_min_small = 256;
866 cFYI(1, "cifs_min_small set to maximum (256)");
869 cifs_sm_req_poolp = mempool_create_slab_pool(cifs_min_small,
872 if (cifs_sm_req_poolp == NULL) {
873 mempool_destroy(cifs_req_poolp);
874 kmem_cache_destroy(cifs_req_cachep);
875 kmem_cache_destroy(cifs_sm_req_cachep);
883 cifs_destroy_request_bufs(void)
885 mempool_destroy(cifs_req_poolp);
886 kmem_cache_destroy(cifs_req_cachep);
887 mempool_destroy(cifs_sm_req_poolp);
888 kmem_cache_destroy(cifs_sm_req_cachep);
894 cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids",
895 sizeof(struct mid_q_entry), 0,
896 SLAB_HWCACHE_ALIGN, NULL);
897 if (cifs_mid_cachep == NULL)
900 /* 3 is a reasonable minimum number of simultaneous operations */
901 cifs_mid_poolp = mempool_create_slab_pool(3, cifs_mid_cachep);
902 if (cifs_mid_poolp == NULL) {
903 kmem_cache_destroy(cifs_mid_cachep);
911 cifs_destroy_mids(void)
913 mempool_destroy(cifs_mid_poolp);
914 kmem_cache_destroy(cifs_mid_cachep);
922 INIT_LIST_HEAD(&cifs_tcp_ses_list);
923 #ifdef CONFIG_CIFS_EXPERIMENTAL
924 INIT_LIST_HEAD(&GlobalDnotifyReqList);
925 INIT_LIST_HEAD(&GlobalDnotifyRsp_Q);
928 * Initialize Global counters
930 atomic_set(&sesInfoAllocCount, 0);
931 atomic_set(&tconInfoAllocCount, 0);
932 atomic_set(&tcpSesAllocCount, 0);
933 atomic_set(&tcpSesReconnectCount, 0);
934 atomic_set(&tconInfoReconnectCount, 0);
936 atomic_set(&bufAllocCount, 0);
937 atomic_set(&smBufAllocCount, 0);
938 #ifdef CONFIG_CIFS_STATS2
939 atomic_set(&totBufAllocCount, 0);
940 atomic_set(&totSmBufAllocCount, 0);
941 #endif /* CONFIG_CIFS_STATS2 */
943 atomic_set(&midCount, 0);
944 GlobalCurrentXid = 0;
945 GlobalTotalActiveXid = 0;
946 GlobalMaxActiveXid = 0;
947 spin_lock_init(&cifs_tcp_ses_lock);
948 spin_lock_init(&cifs_file_list_lock);
949 spin_lock_init(&GlobalMid_Lock);
951 if (cifs_max_pending < 2) {
952 cifs_max_pending = 2;
953 cFYI(1, "cifs_max_pending set to min of 2");
954 } else if (cifs_max_pending > 256) {
955 cifs_max_pending = 256;
956 cFYI(1, "cifs_max_pending set to max of 256");
959 rc = cifs_fscache_register();
963 rc = cifs_init_inodecache();
965 goto out_unreg_fscache;
967 rc = cifs_init_mids();
969 goto out_destroy_inodecache;
971 rc = cifs_init_request_bufs();
973 goto out_destroy_mids;
975 rc = register_filesystem(&cifs_fs_type);
977 goto out_destroy_request_bufs;
978 #ifdef CONFIG_CIFS_UPCALL
979 rc = register_key_type(&cifs_spnego_key_type);
981 goto out_unregister_filesystem;
986 #ifdef CONFIG_CIFS_UPCALL
987 out_unregister_filesystem:
988 unregister_filesystem(&cifs_fs_type);
990 out_destroy_request_bufs:
991 cifs_destroy_request_bufs();
994 out_destroy_inodecache:
995 cifs_destroy_inodecache();
997 cifs_fscache_unregister();
1006 cFYI(DBG2, "exit_cifs");
1008 cifs_fscache_unregister();
1009 #ifdef CONFIG_CIFS_DFS_UPCALL
1010 cifs_dfs_release_automount_timer();
1012 #ifdef CONFIG_CIFS_UPCALL
1013 unregister_key_type(&cifs_spnego_key_type);
1015 unregister_filesystem(&cifs_fs_type);
1016 cifs_destroy_inodecache();
1017 cifs_destroy_mids();
1018 cifs_destroy_request_bufs();
1021 MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>");
1022 MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */
1024 ("VFS to access servers complying with the SNIA CIFS Specification "
1025 "e.g. Samba and Windows");
1026 MODULE_VERSION(CIFS_VERSION);
1027 module_init(init_cifs)
1028 module_exit(exit_cifs)