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 INIT_RADIX_TREE(&cifs_sb->tlink_tree, GFP_KERNEL);
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 cifs_inode->write_behind_rc = 0;
322 /* Until the file is open and we have gotten oplock
323 info back from the server, can not assume caching of
324 file data or metadata */
325 cifs_inode->clientCanCacheRead = false;
326 cifs_inode->clientCanCacheAll = false;
327 cifs_inode->delete_pending = false;
328 cifs_inode->invalid_mapping = false;
329 cifs_inode->vfs_inode.i_blkbits = 14; /* 2**14 = CIFS_MAX_MSGSIZE */
330 cifs_inode->server_eof = 0;
332 /* Can not set i_flags here - they get immediately overwritten
333 to zero by the VFS */
334 /* cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME;*/
335 INIT_LIST_HEAD(&cifs_inode->openFileList);
336 return &cifs_inode->vfs_inode;
340 cifs_destroy_inode(struct inode *inode)
342 kmem_cache_free(cifs_inode_cachep, CIFS_I(inode));
346 cifs_evict_inode(struct inode *inode)
348 truncate_inode_pages(&inode->i_data, 0);
349 end_writeback(inode);
350 cifs_fscache_release_inode_cookie(inode);
354 cifs_show_address(struct seq_file *s, struct TCP_Server_Info *server)
356 seq_printf(s, ",addr=");
358 switch (server->addr.sockAddr.sin_family) {
360 seq_printf(s, "%pI4", &server->addr.sockAddr.sin_addr.s_addr);
363 seq_printf(s, "%pI6",
364 &server->addr.sockAddr6.sin6_addr.s6_addr);
365 if (server->addr.sockAddr6.sin6_scope_id)
366 seq_printf(s, "%%%u",
367 server->addr.sockAddr6.sin6_scope_id);
370 seq_printf(s, "(unknown)");
375 * cifs_show_options() is for displaying mount options in /proc/mounts.
376 * Not all settable options are displayed but most of the important
380 cifs_show_options(struct seq_file *s, struct vfsmount *m)
382 struct cifs_sb_info *cifs_sb = CIFS_SB(m->mnt_sb);
383 struct cifsTconInfo *tcon = cifs_sb_master_tcon(cifs_sb);
384 struct sockaddr *srcaddr;
385 srcaddr = (struct sockaddr *)&tcon->ses->server->srcaddr;
387 seq_printf(s, ",unc=%s", tcon->treeName);
389 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER)
390 seq_printf(s, ",multiuser");
391 else if (tcon->ses->userName)
392 seq_printf(s, ",username=%s", tcon->ses->userName);
394 if (tcon->ses->domainName)
395 seq_printf(s, ",domain=%s", tcon->ses->domainName);
397 if (srcaddr->sa_family != AF_UNSPEC) {
398 struct sockaddr_in *saddr4;
399 struct sockaddr_in6 *saddr6;
400 saddr4 = (struct sockaddr_in *)srcaddr;
401 saddr6 = (struct sockaddr_in6 *)srcaddr;
402 if (srcaddr->sa_family == AF_INET6)
403 seq_printf(s, ",srcaddr=%pI6c",
405 else if (srcaddr->sa_family == AF_INET)
406 seq_printf(s, ",srcaddr=%pI4",
407 &saddr4->sin_addr.s_addr);
409 seq_printf(s, ",srcaddr=BAD-AF:%i",
410 (int)(srcaddr->sa_family));
413 seq_printf(s, ",uid=%d", cifs_sb->mnt_uid);
414 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)
415 seq_printf(s, ",forceuid");
417 seq_printf(s, ",noforceuid");
419 seq_printf(s, ",gid=%d", cifs_sb->mnt_gid);
420 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)
421 seq_printf(s, ",forcegid");
423 seq_printf(s, ",noforcegid");
425 cifs_show_address(s, tcon->ses->server);
428 seq_printf(s, ",file_mode=0%o,dir_mode=0%o",
429 cifs_sb->mnt_file_mode,
430 cifs_sb->mnt_dir_mode);
432 seq_printf(s, ",seal");
434 seq_printf(s, ",nocase");
436 seq_printf(s, ",hard");
437 if (cifs_sb->prepath)
438 seq_printf(s, ",prepath=%s", cifs_sb->prepath);
439 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
440 seq_printf(s, ",posixpaths");
441 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)
442 seq_printf(s, ",setuids");
443 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
444 seq_printf(s, ",serverino");
445 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO)
446 seq_printf(s, ",directio");
447 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
448 seq_printf(s, ",nouser_xattr");
449 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR)
450 seq_printf(s, ",mapchars");
451 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)
452 seq_printf(s, ",sfu");
453 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
454 seq_printf(s, ",nobrl");
455 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
456 seq_printf(s, ",cifsacl");
457 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)
458 seq_printf(s, ",dynperm");
459 if (m->mnt_sb->s_flags & MS_POSIXACL)
460 seq_printf(s, ",acl");
461 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS)
462 seq_printf(s, ",mfsymlinks");
464 seq_printf(s, ",rsize=%d", cifs_sb->rsize);
465 seq_printf(s, ",wsize=%d", cifs_sb->wsize);
470 static void cifs_umount_begin(struct super_block *sb)
472 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
473 struct cifsTconInfo *tcon;
478 tcon = cifs_sb_master_tcon(cifs_sb);
480 spin_lock(&cifs_tcp_ses_lock);
481 if ((tcon->tc_count > 1) || (tcon->tidStatus == CifsExiting)) {
482 /* we have other mounts to same share or we have
483 already tried to force umount this and woken up
484 all waiting network requests, nothing to do */
485 spin_unlock(&cifs_tcp_ses_lock);
487 } else if (tcon->tc_count == 1)
488 tcon->tidStatus = CifsExiting;
489 spin_unlock(&cifs_tcp_ses_lock);
491 /* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */
492 /* cancel_notify_requests(tcon); */
493 if (tcon->ses && tcon->ses->server) {
494 cFYI(1, "wake up tasks now - umount begin not complete");
495 wake_up_all(&tcon->ses->server->request_q);
496 wake_up_all(&tcon->ses->server->response_q);
497 msleep(1); /* yield */
498 /* we have to kick the requests once more */
499 wake_up_all(&tcon->ses->server->response_q);
506 #ifdef CONFIG_CIFS_STATS2
507 static int cifs_show_stats(struct seq_file *s, struct vfsmount *mnt)
514 static int cifs_remount(struct super_block *sb, int *flags, char *data)
516 *flags |= MS_NODIRATIME;
520 static int cifs_drop_inode(struct inode *inode)
522 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
524 /* no serverino => unconditional eviction */
525 return !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) ||
526 generic_drop_inode(inode);
529 static const struct super_operations cifs_super_ops = {
530 .put_super = cifs_put_super,
531 .statfs = cifs_statfs,
532 .alloc_inode = cifs_alloc_inode,
533 .destroy_inode = cifs_destroy_inode,
534 .drop_inode = cifs_drop_inode,
535 .evict_inode = cifs_evict_inode,
536 /* .delete_inode = cifs_delete_inode, */ /* Do not need above
537 function unless later we add lazy close of inodes or unless the
538 kernel forgets to call us with the same number of releases (closes)
540 .show_options = cifs_show_options,
541 .umount_begin = cifs_umount_begin,
542 .remount_fs = cifs_remount,
543 #ifdef CONFIG_CIFS_STATS2
544 .show_stats = cifs_show_stats,
549 cifs_get_sb(struct file_system_type *fs_type,
550 int flags, const char *dev_name, void *data, struct vfsmount *mnt)
553 struct super_block *sb;
555 sb = sget(fs_type, NULL, set_anon_super, NULL);
557 cFYI(1, "Devname: %s flags: %d ", dev_name, flags);
564 rc = cifs_read_super(sb, data, dev_name, flags & MS_SILENT ? 1 : 0);
566 deactivate_locked_super(sb);
569 sb->s_flags |= MS_ACTIVE;
570 simple_set_mnt(mnt, sb);
574 static ssize_t cifs_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
575 unsigned long nr_segs, loff_t pos)
577 struct inode *inode = iocb->ki_filp->f_path.dentry->d_inode;
580 written = generic_file_aio_write(iocb, iov, nr_segs, pos);
581 if (!CIFS_I(inode)->clientCanCacheAll)
582 filemap_fdatawrite(inode->i_mapping);
586 static loff_t cifs_llseek(struct file *file, loff_t offset, int origin)
588 /* origin == SEEK_END => we must revalidate the cached file length */
589 if (origin == SEEK_END) {
592 /* some applications poll for the file length in this strange
593 way so we must seek to end on non-oplocked files by
594 setting the revalidate time to zero */
595 CIFS_I(file->f_path.dentry->d_inode)->time = 0;
597 retval = cifs_revalidate_file(file);
599 return (loff_t)retval;
601 return generic_file_llseek_unlocked(file, offset, origin);
604 static int cifs_setlease(struct file *file, long arg, struct file_lock **lease)
606 /* note that this is called by vfs setlease with lock_flocks held
607 to protect *lease from going away */
608 struct inode *inode = file->f_path.dentry->d_inode;
609 struct cifsFileInfo *cfile = file->private_data;
611 if (!(S_ISREG(inode->i_mode)))
614 /* check if file is oplocked */
615 if (((arg == F_RDLCK) &&
616 (CIFS_I(inode)->clientCanCacheRead)) ||
618 (CIFS_I(inode)->clientCanCacheAll)))
619 return generic_setlease(file, arg, lease);
620 else if (tlink_tcon(cfile->tlink)->local_lease &&
621 !CIFS_I(inode)->clientCanCacheRead)
622 /* If the server claims to support oplock on this
623 file, then we still need to check oplock even
624 if the local_lease mount option is set, but there
625 are servers which do not support oplock for which
626 this mount option may be useful if the user
627 knows that the file won't be changed on the server
629 return generic_setlease(file, arg, lease);
634 struct file_system_type cifs_fs_type = {
635 .owner = THIS_MODULE,
637 .get_sb = cifs_get_sb,
638 .kill_sb = kill_anon_super,
641 const struct inode_operations cifs_dir_inode_ops = {
642 .create = cifs_create,
643 .lookup = cifs_lookup,
644 .getattr = cifs_getattr,
645 .unlink = cifs_unlink,
646 .link = cifs_hardlink,
649 .rename = cifs_rename,
650 .permission = cifs_permission,
651 /* revalidate:cifs_revalidate, */
652 .setattr = cifs_setattr,
653 .symlink = cifs_symlink,
655 #ifdef CONFIG_CIFS_XATTR
656 .setxattr = cifs_setxattr,
657 .getxattr = cifs_getxattr,
658 .listxattr = cifs_listxattr,
659 .removexattr = cifs_removexattr,
663 const struct inode_operations cifs_file_inode_ops = {
664 /* revalidate:cifs_revalidate, */
665 .setattr = cifs_setattr,
666 .getattr = cifs_getattr, /* do we need this anymore? */
667 .rename = cifs_rename,
668 .permission = cifs_permission,
669 #ifdef CONFIG_CIFS_XATTR
670 .setxattr = cifs_setxattr,
671 .getxattr = cifs_getxattr,
672 .listxattr = cifs_listxattr,
673 .removexattr = cifs_removexattr,
677 const struct inode_operations cifs_symlink_inode_ops = {
678 .readlink = generic_readlink,
679 .follow_link = cifs_follow_link,
680 .put_link = cifs_put_link,
681 .permission = cifs_permission,
682 /* BB add the following two eventually */
683 /* revalidate: cifs_revalidate,
684 setattr: cifs_notify_change, *//* BB do we need notify change */
685 #ifdef CONFIG_CIFS_XATTR
686 .setxattr = cifs_setxattr,
687 .getxattr = cifs_getxattr,
688 .listxattr = cifs_listxattr,
689 .removexattr = cifs_removexattr,
693 const struct file_operations cifs_file_ops = {
694 .read = do_sync_read,
695 .write = do_sync_write,
696 .aio_read = generic_file_aio_read,
697 .aio_write = cifs_file_aio_write,
699 .release = cifs_close,
703 .mmap = cifs_file_mmap,
704 .splice_read = generic_file_splice_read,
705 .llseek = cifs_llseek,
706 #ifdef CONFIG_CIFS_POSIX
707 .unlocked_ioctl = cifs_ioctl,
708 #endif /* CONFIG_CIFS_POSIX */
709 .setlease = cifs_setlease,
712 const struct file_operations cifs_file_direct_ops = {
713 /* no aio, no readv -
714 BB reevaluate whether they can be done with directio, no cache */
715 .read = cifs_user_read,
716 .write = cifs_user_write,
718 .release = cifs_close,
722 .mmap = cifs_file_mmap,
723 .splice_read = generic_file_splice_read,
724 #ifdef CONFIG_CIFS_POSIX
725 .unlocked_ioctl = cifs_ioctl,
726 #endif /* CONFIG_CIFS_POSIX */
727 .llseek = cifs_llseek,
728 .setlease = cifs_setlease,
730 const struct file_operations cifs_file_nobrl_ops = {
731 .read = do_sync_read,
732 .write = do_sync_write,
733 .aio_read = generic_file_aio_read,
734 .aio_write = cifs_file_aio_write,
736 .release = cifs_close,
739 .mmap = cifs_file_mmap,
740 .splice_read = generic_file_splice_read,
741 .llseek = cifs_llseek,
742 #ifdef CONFIG_CIFS_POSIX
743 .unlocked_ioctl = cifs_ioctl,
744 #endif /* CONFIG_CIFS_POSIX */
745 .setlease = cifs_setlease,
748 const struct file_operations cifs_file_direct_nobrl_ops = {
749 /* no mmap, no aio, no readv -
750 BB reevaluate whether they can be done with directio, no cache */
751 .read = cifs_user_read,
752 .write = cifs_user_write,
754 .release = cifs_close,
757 .mmap = cifs_file_mmap,
758 .splice_read = generic_file_splice_read,
759 #ifdef CONFIG_CIFS_POSIX
760 .unlocked_ioctl = cifs_ioctl,
761 #endif /* CONFIG_CIFS_POSIX */
762 .llseek = cifs_llseek,
763 .setlease = cifs_setlease,
766 const struct file_operations cifs_dir_ops = {
767 .readdir = cifs_readdir,
768 .release = cifs_closedir,
769 .read = generic_read_dir,
770 .unlocked_ioctl = cifs_ioctl,
771 .llseek = generic_file_llseek,
775 cifs_init_once(void *inode)
777 struct cifsInodeInfo *cifsi = inode;
779 inode_init_once(&cifsi->vfs_inode);
780 INIT_LIST_HEAD(&cifsi->lockList);
784 cifs_init_inodecache(void)
786 cifs_inode_cachep = kmem_cache_create("cifs_inode_cache",
787 sizeof(struct cifsInodeInfo),
788 0, (SLAB_RECLAIM_ACCOUNT|
791 if (cifs_inode_cachep == NULL)
798 cifs_destroy_inodecache(void)
800 kmem_cache_destroy(cifs_inode_cachep);
804 cifs_init_request_bufs(void)
806 if (CIFSMaxBufSize < 8192) {
807 /* Buffer size can not be smaller than 2 * PATH_MAX since maximum
808 Unicode path name has to fit in any SMB/CIFS path based frames */
809 CIFSMaxBufSize = 8192;
810 } else if (CIFSMaxBufSize > 1024*127) {
811 CIFSMaxBufSize = 1024 * 127;
813 CIFSMaxBufSize &= 0x1FE00; /* Round size to even 512 byte mult*/
815 /* cERROR(1, "CIFSMaxBufSize %d 0x%x",CIFSMaxBufSize,CIFSMaxBufSize); */
816 cifs_req_cachep = kmem_cache_create("cifs_request",
818 MAX_CIFS_HDR_SIZE, 0,
819 SLAB_HWCACHE_ALIGN, NULL);
820 if (cifs_req_cachep == NULL)
823 if (cifs_min_rcv < 1)
825 else if (cifs_min_rcv > 64) {
827 cERROR(1, "cifs_min_rcv set to maximum (64)");
830 cifs_req_poolp = mempool_create_slab_pool(cifs_min_rcv,
833 if (cifs_req_poolp == NULL) {
834 kmem_cache_destroy(cifs_req_cachep);
837 /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and
838 almost all handle based requests (but not write response, nor is it
839 sufficient for path based requests). A smaller size would have
840 been more efficient (compacting multiple slab items on one 4k page)
841 for the case in which debug was on, but this larger size allows
842 more SMBs to use small buffer alloc and is still much more
843 efficient to alloc 1 per page off the slab compared to 17K (5page)
844 alloc of large cifs buffers even when page debugging is on */
845 cifs_sm_req_cachep = kmem_cache_create("cifs_small_rq",
846 MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN,
848 if (cifs_sm_req_cachep == NULL) {
849 mempool_destroy(cifs_req_poolp);
850 kmem_cache_destroy(cifs_req_cachep);
854 if (cifs_min_small < 2)
856 else if (cifs_min_small > 256) {
857 cifs_min_small = 256;
858 cFYI(1, "cifs_min_small set to maximum (256)");
861 cifs_sm_req_poolp = mempool_create_slab_pool(cifs_min_small,
864 if (cifs_sm_req_poolp == NULL) {
865 mempool_destroy(cifs_req_poolp);
866 kmem_cache_destroy(cifs_req_cachep);
867 kmem_cache_destroy(cifs_sm_req_cachep);
875 cifs_destroy_request_bufs(void)
877 mempool_destroy(cifs_req_poolp);
878 kmem_cache_destroy(cifs_req_cachep);
879 mempool_destroy(cifs_sm_req_poolp);
880 kmem_cache_destroy(cifs_sm_req_cachep);
886 cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids",
887 sizeof(struct mid_q_entry), 0,
888 SLAB_HWCACHE_ALIGN, NULL);
889 if (cifs_mid_cachep == NULL)
892 /* 3 is a reasonable minimum number of simultaneous operations */
893 cifs_mid_poolp = mempool_create_slab_pool(3, cifs_mid_cachep);
894 if (cifs_mid_poolp == NULL) {
895 kmem_cache_destroy(cifs_mid_cachep);
903 cifs_destroy_mids(void)
905 mempool_destroy(cifs_mid_poolp);
906 kmem_cache_destroy(cifs_mid_cachep);
914 INIT_LIST_HEAD(&cifs_tcp_ses_list);
915 #ifdef CONFIG_CIFS_EXPERIMENTAL
916 INIT_LIST_HEAD(&GlobalDnotifyReqList);
917 INIT_LIST_HEAD(&GlobalDnotifyRsp_Q);
920 * Initialize Global counters
922 atomic_set(&sesInfoAllocCount, 0);
923 atomic_set(&tconInfoAllocCount, 0);
924 atomic_set(&tcpSesAllocCount, 0);
925 atomic_set(&tcpSesReconnectCount, 0);
926 atomic_set(&tconInfoReconnectCount, 0);
928 atomic_set(&bufAllocCount, 0);
929 atomic_set(&smBufAllocCount, 0);
930 #ifdef CONFIG_CIFS_STATS2
931 atomic_set(&totBufAllocCount, 0);
932 atomic_set(&totSmBufAllocCount, 0);
933 #endif /* CONFIG_CIFS_STATS2 */
935 atomic_set(&midCount, 0);
936 GlobalCurrentXid = 0;
937 GlobalTotalActiveXid = 0;
938 GlobalMaxActiveXid = 0;
939 memset(Local_System_Name, 0, 15);
940 spin_lock_init(&cifs_tcp_ses_lock);
941 spin_lock_init(&cifs_file_list_lock);
942 spin_lock_init(&GlobalMid_Lock);
944 if (cifs_max_pending < 2) {
945 cifs_max_pending = 2;
946 cFYI(1, "cifs_max_pending set to min of 2");
947 } else if (cifs_max_pending > 256) {
948 cifs_max_pending = 256;
949 cFYI(1, "cifs_max_pending set to max of 256");
952 rc = cifs_fscache_register();
956 rc = cifs_init_inodecache();
958 goto out_unreg_fscache;
960 rc = cifs_init_mids();
962 goto out_destroy_inodecache;
964 rc = cifs_init_request_bufs();
966 goto out_destroy_mids;
968 rc = register_filesystem(&cifs_fs_type);
970 goto out_destroy_request_bufs;
971 #ifdef CONFIG_CIFS_UPCALL
972 rc = register_key_type(&cifs_spnego_key_type);
974 goto out_unregister_filesystem;
979 #ifdef CONFIG_CIFS_UPCALL
980 out_unregister_filesystem:
981 unregister_filesystem(&cifs_fs_type);
983 out_destroy_request_bufs:
984 cifs_destroy_request_bufs();
987 out_destroy_inodecache:
988 cifs_destroy_inodecache();
990 cifs_fscache_unregister();
999 cFYI(DBG2, "exit_cifs");
1001 cifs_fscache_unregister();
1002 #ifdef CONFIG_CIFS_DFS_UPCALL
1003 cifs_dfs_release_automount_timer();
1005 #ifdef CONFIG_CIFS_UPCALL
1006 unregister_key_type(&cifs_spnego_key_type);
1008 unregister_filesystem(&cifs_fs_type);
1009 cifs_destroy_inodecache();
1010 cifs_destroy_mids();
1011 cifs_destroy_request_bufs();
1014 MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>");
1015 MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */
1017 ("VFS to access servers complying with the SNIA CIFS Specification "
1018 "e.g. Samba and Windows");
1019 MODULE_VERSION(CIFS_VERSION);
1020 module_init(init_cifs)
1021 module_exit(exit_cifs)