4 * Copyright (C) International Business Machines Corp., 2002,2008
5 * Author(s): Steve French (sfrench@us.ibm.com)
7 * Common Internet FileSystem (CIFS) client
9 * This library is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU Lesser General Public License as published
11 * by the Free Software Foundation; either version 2.1 of the License, or
12 * (at your option) any later version.
14 * This library is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
17 * the GNU Lesser General Public License for more details.
19 * You should have received a copy of the GNU Lesser General Public License
20 * along with this library; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 /* Note that BB means BUGBUG (ie something to fix eventually) */
26 #include <linux/module.h>
28 #include <linux/mount.h>
29 #include <linux/slab.h>
30 #include <linux/init.h>
31 #include <linux/list.h>
32 #include <linux/seq_file.h>
33 #include <linux/vfs.h>
34 #include <linux/mempool.h>
35 #include <linux/delay.h>
36 #include <linux/kthread.h>
37 #include <linux/freezer.h>
41 #define DECLARE_GLOBALS_HERE
43 #include "cifsproto.h"
44 #include "cifs_debug.h"
45 #include "cifs_fs_sb.h"
47 #include <linux/key-type.h>
48 #include "cifs_spnego.h"
50 #define CIFS_MAGIC_NUMBER 0xFF534D42 /* the first four bytes of SMB PDUs */
55 unsigned int oplockEnabled = 1;
56 unsigned int linuxExtEnabled = 1;
57 unsigned int lookupCacheEnabled = 1;
58 unsigned int multiuser_mount = 0;
59 unsigned int global_secflags = CIFSSEC_DEF;
60 /* unsigned int ntlmv2_support = 0; */
61 unsigned int sign_CIFS_PDUs = 1;
62 static const struct super_operations cifs_super_ops;
63 unsigned int CIFSMaxBufSize = CIFS_MAX_MSGSIZE;
64 module_param(CIFSMaxBufSize, int, 0);
65 MODULE_PARM_DESC(CIFSMaxBufSize, "Network buffer size (not including header). "
66 "Default: 16384 Range: 8192 to 130048");
67 unsigned int cifs_min_rcv = CIFS_MIN_RCV_POOL;
68 module_param(cifs_min_rcv, int, 0);
69 MODULE_PARM_DESC(cifs_min_rcv, "Network buffers in pool. Default: 4 Range: "
71 unsigned int cifs_min_small = 30;
72 module_param(cifs_min_small, int, 0);
73 MODULE_PARM_DESC(cifs_min_small, "Small network buffers in pool. Default: 30 "
75 unsigned int cifs_max_pending = CIFS_MAX_REQ;
76 module_param(cifs_max_pending, int, 0);
77 MODULE_PARM_DESC(cifs_max_pending, "Simultaneous requests to server. "
78 "Default: 50 Range: 2 to 256");
79 unsigned short echo_retries = 5;
80 module_param(echo_retries, ushort, 0644);
81 MODULE_PARM_DESC(echo_retries, "Number of echo attempts before giving up and "
82 "reconnecting server. Default: 5. 0 means "
84 extern mempool_t *cifs_sm_req_poolp;
85 extern mempool_t *cifs_req_poolp;
86 extern mempool_t *cifs_mid_poolp;
89 cifs_sb_active(struct super_block *sb)
91 struct cifs_sb_info *server = CIFS_SB(sb);
93 if (atomic_inc_return(&server->active) == 1)
94 atomic_inc(&sb->s_active);
98 cifs_sb_deactive(struct super_block *sb)
100 struct cifs_sb_info *server = CIFS_SB(sb);
102 if (atomic_dec_and_test(&server->active))
103 deactivate_super(sb);
107 cifs_read_super(struct super_block *sb, struct cifs_sb_info *cifs_sb,
108 void *data, struct smb_vol *volume_info, const char *devname,
114 /* BB should we make this contingent on mount parm? */
115 sb->s_flags |= MS_NODIRATIME | MS_NOATIME;
116 sb->s_fs_info = cifs_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);
126 cifs_sb->bdi.ra_pages = default_backing_dev_info.ra_pages;
129 cifs_sb->mountdata = data;
131 rc = cifs_mount(sb, cifs_sb, volume_info, devname);
135 cERROR(1, "cifs_mount failed w/return code = %d", rc);
136 goto out_mount_failed;
139 sb->s_magic = CIFS_MAGIC_NUMBER;
140 sb->s_op = &cifs_super_ops;
141 sb->s_bdi = &cifs_sb->bdi;
142 sb->s_blocksize = CIFS_MAX_MSGSIZE;
143 sb->s_blocksize_bits = 14; /* default 2**14 = CIFS_MAX_MSGSIZE */
144 inode = cifs_root_iget(sb);
152 sb->s_root = d_alloc_root(inode);
159 /* do that *after* d_alloc_root() - we want NULL ->d_op for root here */
160 if (cifs_sb_master_tcon(cifs_sb)->nocase)
161 sb->s_d_op = &cifs_ci_dentry_ops;
163 sb->s_d_op = &cifs_dentry_ops;
165 #ifdef CIFS_NFSD_EXPORT
166 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
167 cFYI(1, "export ops supported");
168 sb->s_export_op = &cifs_export_ops;
170 #endif /* CIFS_NFSD_EXPORT */
175 cERROR(1, "cifs_read_super: get root inode failed");
179 cifs_umount(sb, cifs_sb);
183 if (cifs_sb->mountdata) {
184 kfree(cifs_sb->mountdata);
185 cifs_sb->mountdata = NULL;
187 unload_nls(cifs_sb->local_nls);
188 bdi_destroy(&cifs_sb->bdi);
195 cifs_put_super(struct super_block *sb)
198 struct cifs_sb_info *cifs_sb;
200 cFYI(1, "In cifs_put_super");
201 cifs_sb = CIFS_SB(sb);
202 if (cifs_sb == NULL) {
203 cFYI(1, "Empty cifs superblock info passed to unmount");
207 rc = cifs_umount(sb, cifs_sb);
209 cERROR(1, "cifs_umount failed with return code %d", rc);
210 if (cifs_sb->mountdata) {
211 kfree(cifs_sb->mountdata);
212 cifs_sb->mountdata = NULL;
215 unload_nls(cifs_sb->local_nls);
216 bdi_destroy(&cifs_sb->bdi);
221 cifs_statfs(struct dentry *dentry, struct kstatfs *buf)
223 struct super_block *sb = dentry->d_sb;
224 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
225 struct cifsTconInfo *tcon = cifs_sb_master_tcon(cifs_sb);
226 int rc = -EOPNOTSUPP;
231 buf->f_type = CIFS_MAGIC_NUMBER;
234 * PATH_MAX may be too long - it would presumably be total path,
235 * but note that some servers (includinng Samba 3) have a shorter
238 * Instead could get the real value via SMB_QUERY_FS_ATTRIBUTE_INFO.
240 buf->f_namelen = PATH_MAX;
241 buf->f_files = 0; /* undefined */
242 buf->f_ffree = 0; /* unlimited */
245 * We could add a second check for a QFS Unix capability bit
247 if ((tcon->ses->capabilities & CAP_UNIX) &&
248 (CIFS_POSIX_EXTENSIONS & le64_to_cpu(tcon->fsUnixInfo.Capability)))
249 rc = CIFSSMBQFSPosixInfo(xid, tcon, buf);
252 * Only need to call the old QFSInfo if failed on newer one,
255 if (rc && (tcon->ses->capabilities & CAP_NT_SMBS))
256 rc = CIFSSMBQFSInfo(xid, tcon, buf);
259 * Some old Windows servers also do not support level 103, retry with
260 * older level one if old server failed the previous call or we
261 * bypassed it because we detected that this was an older LANMAN sess
264 rc = SMBOldQFSInfo(xid, tcon, buf);
270 static int cifs_permission(struct inode *inode, int mask, unsigned int flags)
272 struct cifs_sb_info *cifs_sb;
274 if (flags & IPERM_FLAG_RCU)
277 cifs_sb = CIFS_SB(inode->i_sb);
279 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) {
280 if ((mask & MAY_EXEC) && !execute_ok(inode))
284 } else /* file mode might have been restricted at mount time
285 on the client (above and beyond ACL on servers) for
286 servers which do not support setting and viewing mode bits,
287 so allowing client to check permissions is useful */
288 return generic_permission(inode, mask, flags, NULL);
291 static struct kmem_cache *cifs_inode_cachep;
292 static struct kmem_cache *cifs_req_cachep;
293 static struct kmem_cache *cifs_mid_cachep;
294 static struct kmem_cache *cifs_sm_req_cachep;
295 mempool_t *cifs_sm_req_poolp;
296 mempool_t *cifs_req_poolp;
297 mempool_t *cifs_mid_poolp;
299 static struct inode *
300 cifs_alloc_inode(struct super_block *sb)
302 struct cifsInodeInfo *cifs_inode;
303 cifs_inode = kmem_cache_alloc(cifs_inode_cachep, GFP_KERNEL);
306 cifs_inode->cifsAttrs = 0x20; /* default */
307 cifs_inode->time = 0;
308 /* Until the file is open and we have gotten oplock
309 info back from the server, can not assume caching of
310 file data or metadata */
311 cifs_set_oplock_level(cifs_inode, 0);
312 cifs_inode->delete_pending = false;
313 cifs_inode->invalid_mapping = false;
314 cifs_inode->vfs_inode.i_blkbits = 14; /* 2**14 = CIFS_MAX_MSGSIZE */
315 cifs_inode->server_eof = 0;
316 cifs_inode->uniqueid = 0;
317 cifs_inode->createtime = 0;
319 /* Can not set i_flags here - they get immediately overwritten
320 to zero by the VFS */
321 /* cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME;*/
322 INIT_LIST_HEAD(&cifs_inode->openFileList);
323 return &cifs_inode->vfs_inode;
326 static void cifs_i_callback(struct rcu_head *head)
328 struct inode *inode = container_of(head, struct inode, i_rcu);
329 INIT_LIST_HEAD(&inode->i_dentry);
330 kmem_cache_free(cifs_inode_cachep, CIFS_I(inode));
334 cifs_destroy_inode(struct inode *inode)
336 call_rcu(&inode->i_rcu, cifs_i_callback);
340 cifs_evict_inode(struct inode *inode)
342 truncate_inode_pages(&inode->i_data, 0);
343 end_writeback(inode);
344 cifs_fscache_release_inode_cookie(inode);
348 cifs_show_address(struct seq_file *s, struct TCP_Server_Info *server)
350 struct sockaddr_in *sa = (struct sockaddr_in *) &server->dstaddr;
351 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *) &server->dstaddr;
353 seq_printf(s, ",addr=");
355 switch (server->dstaddr.ss_family) {
357 seq_printf(s, "%pI4", &sa->sin_addr.s_addr);
360 seq_printf(s, "%pI6", &sa6->sin6_addr.s6_addr);
361 if (sa6->sin6_scope_id)
362 seq_printf(s, "%%%u", sa6->sin6_scope_id);
365 seq_printf(s, "(unknown)");
370 * cifs_show_options() is for displaying mount options in /proc/mounts.
371 * Not all settable options are displayed but most of the important
375 cifs_show_options(struct seq_file *s, struct vfsmount *m)
377 struct cifs_sb_info *cifs_sb = CIFS_SB(m->mnt_sb);
378 struct cifsTconInfo *tcon = cifs_sb_master_tcon(cifs_sb);
379 struct sockaddr *srcaddr;
380 srcaddr = (struct sockaddr *)&tcon->ses->server->srcaddr;
382 seq_printf(s, ",unc=%s", tcon->treeName);
384 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER)
385 seq_printf(s, ",multiuser");
386 else if (tcon->ses->user_name)
387 seq_printf(s, ",username=%s", tcon->ses->user_name);
389 if (tcon->ses->domainName)
390 seq_printf(s, ",domain=%s", tcon->ses->domainName);
392 if (srcaddr->sa_family != AF_UNSPEC) {
393 struct sockaddr_in *saddr4;
394 struct sockaddr_in6 *saddr6;
395 saddr4 = (struct sockaddr_in *)srcaddr;
396 saddr6 = (struct sockaddr_in6 *)srcaddr;
397 if (srcaddr->sa_family == AF_INET6)
398 seq_printf(s, ",srcaddr=%pI6c",
400 else if (srcaddr->sa_family == AF_INET)
401 seq_printf(s, ",srcaddr=%pI4",
402 &saddr4->sin_addr.s_addr);
404 seq_printf(s, ",srcaddr=BAD-AF:%i",
405 (int)(srcaddr->sa_family));
408 seq_printf(s, ",uid=%d", cifs_sb->mnt_uid);
409 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)
410 seq_printf(s, ",forceuid");
412 seq_printf(s, ",noforceuid");
414 seq_printf(s, ",gid=%d", cifs_sb->mnt_gid);
415 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)
416 seq_printf(s, ",forcegid");
418 seq_printf(s, ",noforcegid");
420 cifs_show_address(s, tcon->ses->server);
423 seq_printf(s, ",file_mode=0%o,dir_mode=0%o",
424 cifs_sb->mnt_file_mode,
425 cifs_sb->mnt_dir_mode);
427 seq_printf(s, ",seal");
429 seq_printf(s, ",nocase");
431 seq_printf(s, ",hard");
432 if (cifs_sb->prepath)
433 seq_printf(s, ",prepath=%s", cifs_sb->prepath);
434 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
435 seq_printf(s, ",posixpaths");
436 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)
437 seq_printf(s, ",setuids");
438 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
439 seq_printf(s, ",serverino");
440 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO)
441 seq_printf(s, ",directio");
442 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
443 seq_printf(s, ",nouser_xattr");
444 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR)
445 seq_printf(s, ",mapchars");
446 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)
447 seq_printf(s, ",sfu");
448 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
449 seq_printf(s, ",nobrl");
450 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
451 seq_printf(s, ",cifsacl");
452 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)
453 seq_printf(s, ",dynperm");
454 if (m->mnt_sb->s_flags & MS_POSIXACL)
455 seq_printf(s, ",acl");
456 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS)
457 seq_printf(s, ",mfsymlinks");
458 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_FSCACHE)
459 seq_printf(s, ",fsc");
461 seq_printf(s, ",rsize=%d", cifs_sb->rsize);
462 seq_printf(s, ",wsize=%d", cifs_sb->wsize);
463 /* convert actimeo and display it in seconds */
464 seq_printf(s, ",actimeo=%lu", cifs_sb->actimeo / HZ);
469 static void cifs_umount_begin(struct super_block *sb)
471 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
472 struct cifsTconInfo *tcon;
477 tcon = cifs_sb_master_tcon(cifs_sb);
479 spin_lock(&cifs_tcp_ses_lock);
480 if ((tcon->tc_count > 1) || (tcon->tidStatus == CifsExiting)) {
481 /* we have other mounts to same share or we have
482 already tried to force umount this and woken up
483 all waiting network requests, nothing to do */
484 spin_unlock(&cifs_tcp_ses_lock);
486 } else if (tcon->tc_count == 1)
487 tcon->tidStatus = CifsExiting;
488 spin_unlock(&cifs_tcp_ses_lock);
490 /* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */
491 /* cancel_notify_requests(tcon); */
492 if (tcon->ses && tcon->ses->server) {
493 cFYI(1, "wake up tasks now - umount begin not complete");
494 wake_up_all(&tcon->ses->server->request_q);
495 wake_up_all(&tcon->ses->server->response_q);
496 msleep(1); /* yield */
497 /* we have to kick the requests once more */
498 wake_up_all(&tcon->ses->server->response_q);
505 #ifdef CONFIG_CIFS_STATS2
506 static int cifs_show_stats(struct seq_file *s, struct vfsmount *mnt)
513 static int cifs_remount(struct super_block *sb, int *flags, char *data)
515 *flags |= MS_NODIRATIME;
519 static int cifs_drop_inode(struct inode *inode)
521 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
523 /* no serverino => unconditional eviction */
524 return !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) ||
525 generic_drop_inode(inode);
528 static const struct super_operations cifs_super_ops = {
529 .put_super = cifs_put_super,
530 .statfs = cifs_statfs,
531 .alloc_inode = cifs_alloc_inode,
532 .destroy_inode = cifs_destroy_inode,
533 .drop_inode = cifs_drop_inode,
534 .evict_inode = cifs_evict_inode,
535 /* .delete_inode = cifs_delete_inode, */ /* Do not need above
536 function unless later we add lazy close of inodes or unless the
537 kernel forgets to call us with the same number of releases (closes)
539 .show_options = cifs_show_options,
540 .umount_begin = cifs_umount_begin,
541 .remount_fs = cifs_remount,
542 #ifdef CONFIG_CIFS_STATS2
543 .show_stats = cifs_show_stats,
547 static struct dentry *
548 cifs_do_mount(struct file_system_type *fs_type,
549 int flags, const char *dev_name, void *data)
552 struct super_block *sb;
553 struct cifs_sb_info *cifs_sb;
554 struct smb_vol *volume_info;
556 char *copied_data = NULL;
558 cFYI(1, "Devname: %s flags: %d ", dev_name, flags);
560 rc = cifs_setup_volume_info(&volume_info, (char *)data, dev_name);
564 cifs_sb = kzalloc(sizeof(struct cifs_sb_info), GFP_KERNEL);
565 if (cifs_sb == NULL) {
566 root = ERR_PTR(-ENOMEM);
570 cifs_setup_cifs_sb(volume_info, cifs_sb);
572 sb = sget(fs_type, NULL, set_anon_super, NULL);
582 * Copy mount params for use in submounts. Better to do
583 * the copy here and deal with the error before cleanup gets
584 * complicated post-mount.
586 copied_data = kstrndup(data, PAGE_SIZE, GFP_KERNEL);
587 if (copied_data == NULL) {
588 root = ERR_PTR(-ENOMEM);
592 rc = cifs_read_super(sb, cifs_sb, copied_data, volume_info, dev_name,
593 flags & MS_SILENT ? 1 : 0);
599 sb->s_flags |= MS_ACTIVE;
601 root = dget(sb->s_root);
603 cifs_cleanup_volume_info(&volume_info);
608 deactivate_locked_super(sb);
609 cifs_cleanup_volume_info(&volume_info);
613 static ssize_t cifs_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
614 unsigned long nr_segs, loff_t pos)
616 struct inode *inode = iocb->ki_filp->f_path.dentry->d_inode;
620 written = generic_file_aio_write(iocb, iov, nr_segs, pos);
622 if (CIFS_I(inode)->clientCanCacheAll)
625 rc = filemap_fdatawrite(inode->i_mapping);
627 cFYI(1, "cifs_file_aio_write: %d rc on %p inode", rc, inode);
632 static loff_t cifs_llseek(struct file *file, loff_t offset, int origin)
634 /* origin == SEEK_END => we must revalidate the cached file length */
635 if (origin == SEEK_END) {
637 struct inode *inode = file->f_path.dentry->d_inode;
640 * We need to be sure that all dirty pages are written and the
641 * server has the newest file length.
643 if (!CIFS_I(inode)->clientCanCacheRead && inode->i_mapping &&
644 inode->i_mapping->nrpages != 0) {
645 rc = filemap_fdatawait(inode->i_mapping);
647 mapping_set_error(inode->i_mapping, rc);
652 * Some applications poll for the file length in this strange
653 * way so we must seek to end on non-oplocked files by
654 * setting the revalidate time to zero.
656 CIFS_I(inode)->time = 0;
658 rc = cifs_revalidate_file_attr(file);
662 return generic_file_llseek_unlocked(file, offset, origin);
665 static int cifs_setlease(struct file *file, long arg, struct file_lock **lease)
667 /* note that this is called by vfs setlease with lock_flocks held
668 to protect *lease from going away */
669 struct inode *inode = file->f_path.dentry->d_inode;
670 struct cifsFileInfo *cfile = file->private_data;
672 if (!(S_ISREG(inode->i_mode)))
675 /* check if file is oplocked */
676 if (((arg == F_RDLCK) &&
677 (CIFS_I(inode)->clientCanCacheRead)) ||
679 (CIFS_I(inode)->clientCanCacheAll)))
680 return generic_setlease(file, arg, lease);
681 else if (tlink_tcon(cfile->tlink)->local_lease &&
682 !CIFS_I(inode)->clientCanCacheRead)
683 /* If the server claims to support oplock on this
684 file, then we still need to check oplock even
685 if the local_lease mount option is set, but there
686 are servers which do not support oplock for which
687 this mount option may be useful if the user
688 knows that the file won't be changed on the server
690 return generic_setlease(file, arg, lease);
695 struct file_system_type cifs_fs_type = {
696 .owner = THIS_MODULE,
698 .mount = cifs_do_mount,
699 .kill_sb = kill_anon_super,
702 const struct inode_operations cifs_dir_inode_ops = {
703 .create = cifs_create,
704 .lookup = cifs_lookup,
705 .getattr = cifs_getattr,
706 .unlink = cifs_unlink,
707 .link = cifs_hardlink,
710 .rename = cifs_rename,
711 .permission = cifs_permission,
712 /* revalidate:cifs_revalidate, */
713 .setattr = cifs_setattr,
714 .symlink = cifs_symlink,
716 #ifdef CONFIG_CIFS_XATTR
717 .setxattr = cifs_setxattr,
718 .getxattr = cifs_getxattr,
719 .listxattr = cifs_listxattr,
720 .removexattr = cifs_removexattr,
724 const struct inode_operations cifs_file_inode_ops = {
725 /* revalidate:cifs_revalidate, */
726 .setattr = cifs_setattr,
727 .getattr = cifs_getattr, /* do we need this anymore? */
728 .rename = cifs_rename,
729 .permission = cifs_permission,
730 #ifdef CONFIG_CIFS_XATTR
731 .setxattr = cifs_setxattr,
732 .getxattr = cifs_getxattr,
733 .listxattr = cifs_listxattr,
734 .removexattr = cifs_removexattr,
738 const struct inode_operations cifs_symlink_inode_ops = {
739 .readlink = generic_readlink,
740 .follow_link = cifs_follow_link,
741 .put_link = cifs_put_link,
742 .permission = cifs_permission,
743 /* BB add the following two eventually */
744 /* revalidate: cifs_revalidate,
745 setattr: cifs_notify_change, *//* BB do we need notify change */
746 #ifdef CONFIG_CIFS_XATTR
747 .setxattr = cifs_setxattr,
748 .getxattr = cifs_getxattr,
749 .listxattr = cifs_listxattr,
750 .removexattr = cifs_removexattr,
754 const struct file_operations cifs_file_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,
764 .mmap = cifs_file_mmap,
765 .splice_read = generic_file_splice_read,
766 .llseek = cifs_llseek,
767 #ifdef CONFIG_CIFS_POSIX
768 .unlocked_ioctl = cifs_ioctl,
769 #endif /* CONFIG_CIFS_POSIX */
770 .setlease = cifs_setlease,
773 const struct file_operations cifs_file_strict_ops = {
774 .read = do_sync_read,
775 .write = do_sync_write,
776 .aio_read = cifs_strict_readv,
777 .aio_write = cifs_strict_writev,
779 .release = cifs_close,
781 .fsync = cifs_strict_fsync,
783 .mmap = cifs_file_strict_mmap,
784 .splice_read = generic_file_splice_read,
785 .llseek = cifs_llseek,
786 #ifdef CONFIG_CIFS_POSIX
787 .unlocked_ioctl = cifs_ioctl,
788 #endif /* CONFIG_CIFS_POSIX */
789 .setlease = cifs_setlease,
792 const struct file_operations cifs_file_direct_ops = {
793 /* BB reevaluate whether they can be done with directio, no cache */
794 .read = do_sync_read,
795 .write = do_sync_write,
796 .aio_read = cifs_user_readv,
797 .aio_write = cifs_user_writev,
799 .release = cifs_close,
803 .mmap = cifs_file_mmap,
804 .splice_read = generic_file_splice_read,
805 #ifdef CONFIG_CIFS_POSIX
806 .unlocked_ioctl = cifs_ioctl,
807 #endif /* CONFIG_CIFS_POSIX */
808 .llseek = cifs_llseek,
809 .setlease = cifs_setlease,
812 const struct file_operations cifs_file_nobrl_ops = {
813 .read = do_sync_read,
814 .write = do_sync_write,
815 .aio_read = generic_file_aio_read,
816 .aio_write = cifs_file_aio_write,
818 .release = cifs_close,
821 .mmap = cifs_file_mmap,
822 .splice_read = generic_file_splice_read,
823 .llseek = cifs_llseek,
824 #ifdef CONFIG_CIFS_POSIX
825 .unlocked_ioctl = cifs_ioctl,
826 #endif /* CONFIG_CIFS_POSIX */
827 .setlease = cifs_setlease,
830 const struct file_operations cifs_file_strict_nobrl_ops = {
831 .read = do_sync_read,
832 .write = do_sync_write,
833 .aio_read = cifs_strict_readv,
834 .aio_write = cifs_strict_writev,
836 .release = cifs_close,
837 .fsync = cifs_strict_fsync,
839 .mmap = cifs_file_strict_mmap,
840 .splice_read = generic_file_splice_read,
841 .llseek = cifs_llseek,
842 #ifdef CONFIG_CIFS_POSIX
843 .unlocked_ioctl = cifs_ioctl,
844 #endif /* CONFIG_CIFS_POSIX */
845 .setlease = cifs_setlease,
848 const struct file_operations cifs_file_direct_nobrl_ops = {
849 /* BB reevaluate whether they can be done with directio, no cache */
850 .read = do_sync_read,
851 .write = do_sync_write,
852 .aio_read = cifs_user_readv,
853 .aio_write = cifs_user_writev,
855 .release = cifs_close,
858 .mmap = cifs_file_mmap,
859 .splice_read = generic_file_splice_read,
860 #ifdef CONFIG_CIFS_POSIX
861 .unlocked_ioctl = cifs_ioctl,
862 #endif /* CONFIG_CIFS_POSIX */
863 .llseek = cifs_llseek,
864 .setlease = cifs_setlease,
867 const struct file_operations cifs_dir_ops = {
868 .readdir = cifs_readdir,
869 .release = cifs_closedir,
870 .read = generic_read_dir,
871 .unlocked_ioctl = cifs_ioctl,
872 .llseek = generic_file_llseek,
876 cifs_init_once(void *inode)
878 struct cifsInodeInfo *cifsi = inode;
880 inode_init_once(&cifsi->vfs_inode);
881 INIT_LIST_HEAD(&cifsi->lockList);
885 cifs_init_inodecache(void)
887 cifs_inode_cachep = kmem_cache_create("cifs_inode_cache",
888 sizeof(struct cifsInodeInfo),
889 0, (SLAB_RECLAIM_ACCOUNT|
892 if (cifs_inode_cachep == NULL)
899 cifs_destroy_inodecache(void)
901 kmem_cache_destroy(cifs_inode_cachep);
905 cifs_init_request_bufs(void)
907 if (CIFSMaxBufSize < 8192) {
908 /* Buffer size can not be smaller than 2 * PATH_MAX since maximum
909 Unicode path name has to fit in any SMB/CIFS path based frames */
910 CIFSMaxBufSize = 8192;
911 } else if (CIFSMaxBufSize > 1024*127) {
912 CIFSMaxBufSize = 1024 * 127;
914 CIFSMaxBufSize &= 0x1FE00; /* Round size to even 512 byte mult*/
916 /* cERROR(1, "CIFSMaxBufSize %d 0x%x",CIFSMaxBufSize,CIFSMaxBufSize); */
917 cifs_req_cachep = kmem_cache_create("cifs_request",
919 MAX_CIFS_HDR_SIZE, 0,
920 SLAB_HWCACHE_ALIGN, NULL);
921 if (cifs_req_cachep == NULL)
924 if (cifs_min_rcv < 1)
926 else if (cifs_min_rcv > 64) {
928 cERROR(1, "cifs_min_rcv set to maximum (64)");
931 cifs_req_poolp = mempool_create_slab_pool(cifs_min_rcv,
934 if (cifs_req_poolp == NULL) {
935 kmem_cache_destroy(cifs_req_cachep);
938 /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and
939 almost all handle based requests (but not write response, nor is it
940 sufficient for path based requests). A smaller size would have
941 been more efficient (compacting multiple slab items on one 4k page)
942 for the case in which debug was on, but this larger size allows
943 more SMBs to use small buffer alloc and is still much more
944 efficient to alloc 1 per page off the slab compared to 17K (5page)
945 alloc of large cifs buffers even when page debugging is on */
946 cifs_sm_req_cachep = kmem_cache_create("cifs_small_rq",
947 MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN,
949 if (cifs_sm_req_cachep == NULL) {
950 mempool_destroy(cifs_req_poolp);
951 kmem_cache_destroy(cifs_req_cachep);
955 if (cifs_min_small < 2)
957 else if (cifs_min_small > 256) {
958 cifs_min_small = 256;
959 cFYI(1, "cifs_min_small set to maximum (256)");
962 cifs_sm_req_poolp = mempool_create_slab_pool(cifs_min_small,
965 if (cifs_sm_req_poolp == NULL) {
966 mempool_destroy(cifs_req_poolp);
967 kmem_cache_destroy(cifs_req_cachep);
968 kmem_cache_destroy(cifs_sm_req_cachep);
976 cifs_destroy_request_bufs(void)
978 mempool_destroy(cifs_req_poolp);
979 kmem_cache_destroy(cifs_req_cachep);
980 mempool_destroy(cifs_sm_req_poolp);
981 kmem_cache_destroy(cifs_sm_req_cachep);
987 cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids",
988 sizeof(struct mid_q_entry), 0,
989 SLAB_HWCACHE_ALIGN, NULL);
990 if (cifs_mid_cachep == NULL)
993 /* 3 is a reasonable minimum number of simultaneous operations */
994 cifs_mid_poolp = mempool_create_slab_pool(3, cifs_mid_cachep);
995 if (cifs_mid_poolp == NULL) {
996 kmem_cache_destroy(cifs_mid_cachep);
1004 cifs_destroy_mids(void)
1006 mempool_destroy(cifs_mid_poolp);
1007 kmem_cache_destroy(cifs_mid_cachep);
1015 INIT_LIST_HEAD(&cifs_tcp_ses_list);
1016 #ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
1017 INIT_LIST_HEAD(&GlobalDnotifyReqList);
1018 INIT_LIST_HEAD(&GlobalDnotifyRsp_Q);
1019 #endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
1021 * Initialize Global counters
1023 atomic_set(&sesInfoAllocCount, 0);
1024 atomic_set(&tconInfoAllocCount, 0);
1025 atomic_set(&tcpSesAllocCount, 0);
1026 atomic_set(&tcpSesReconnectCount, 0);
1027 atomic_set(&tconInfoReconnectCount, 0);
1029 atomic_set(&bufAllocCount, 0);
1030 atomic_set(&smBufAllocCount, 0);
1031 #ifdef CONFIG_CIFS_STATS2
1032 atomic_set(&totBufAllocCount, 0);
1033 atomic_set(&totSmBufAllocCount, 0);
1034 #endif /* CONFIG_CIFS_STATS2 */
1036 atomic_set(&midCount, 0);
1037 GlobalCurrentXid = 0;
1038 GlobalTotalActiveXid = 0;
1039 GlobalMaxActiveXid = 0;
1040 spin_lock_init(&cifs_tcp_ses_lock);
1041 spin_lock_init(&cifs_file_list_lock);
1042 spin_lock_init(&GlobalMid_Lock);
1044 if (cifs_max_pending < 2) {
1045 cifs_max_pending = 2;
1046 cFYI(1, "cifs_max_pending set to min of 2");
1047 } else if (cifs_max_pending > 256) {
1048 cifs_max_pending = 256;
1049 cFYI(1, "cifs_max_pending set to max of 256");
1052 rc = cifs_fscache_register();
1054 goto out_clean_proc;
1056 rc = cifs_init_inodecache();
1058 goto out_unreg_fscache;
1060 rc = cifs_init_mids();
1062 goto out_destroy_inodecache;
1064 rc = cifs_init_request_bufs();
1066 goto out_destroy_mids;
1068 #ifdef CONFIG_CIFS_UPCALL
1069 rc = register_key_type(&cifs_spnego_key_type);
1071 goto out_destroy_request_bufs;
1072 #endif /* CONFIG_CIFS_UPCALL */
1074 #ifdef CONFIG_CIFS_ACL
1075 rc = init_cifs_idmap();
1077 goto out_register_key_type;
1078 #endif /* CONFIG_CIFS_ACL */
1080 rc = register_filesystem(&cifs_fs_type);
1082 goto out_init_cifs_idmap;
1086 out_init_cifs_idmap:
1087 #ifdef CONFIG_CIFS_ACL
1089 out_register_key_type:
1091 #ifdef CONFIG_CIFS_UPCALL
1092 unregister_key_type(&cifs_spnego_key_type);
1093 out_destroy_request_bufs:
1095 cifs_destroy_request_bufs();
1097 cifs_destroy_mids();
1098 out_destroy_inodecache:
1099 cifs_destroy_inodecache();
1101 cifs_fscache_unregister();
1110 cFYI(DBG2, "exit_cifs");
1112 cifs_fscache_unregister();
1113 #ifdef CONFIG_CIFS_DFS_UPCALL
1114 cifs_dfs_release_automount_timer();
1116 #ifdef CONFIG_CIFS_ACL
1117 cifs_destroy_idmaptrees();
1120 #ifdef CONFIG_CIFS_UPCALL
1121 unregister_key_type(&cifs_spnego_key_type);
1123 unregister_filesystem(&cifs_fs_type);
1124 cifs_destroy_inodecache();
1125 cifs_destroy_mids();
1126 cifs_destroy_request_bufs();
1129 MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>");
1130 MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */
1132 ("VFS to access servers complying with the SNIA CIFS Specification "
1133 "e.g. Samba and Windows");
1134 MODULE_VERSION(CIFS_VERSION);
1135 module_init(init_cifs)
1136 module_exit(exit_cifs)