4 * Copyright (C) International Business Machines Corp., 2002,2008
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>
38 #include <linux/namei.h>
42 #define DECLARE_GLOBALS_HERE
44 #include "cifsproto.h"
45 #include "cifs_debug.h"
46 #include "cifs_fs_sb.h"
48 #include <linux/key-type.h>
49 #include "cifs_spnego.h"
51 #define CIFS_MAGIC_NUMBER 0xFF534D42 /* the first four bytes of SMB PDUs */
56 unsigned int oplockEnabled = 1;
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)
111 struct cifs_sb_info *cifs_sb;
114 cifs_sb = CIFS_SB(sb);
116 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIXACL)
117 sb->s_flags |= MS_POSIXACL;
119 if (cifs_sb_master_tcon(cifs_sb)->ses->capabilities & CAP_LARGE_FILES)
120 sb->s_maxbytes = MAX_LFS_FILESIZE;
122 sb->s_maxbytes = MAX_NON_LFS;
124 /* BB FIXME fix time_gran to be larger for LANMAN sessions */
125 sb->s_time_gran = 100;
127 sb->s_magic = CIFS_MAGIC_NUMBER;
128 sb->s_op = &cifs_super_ops;
129 sb->s_bdi = &cifs_sb->bdi;
130 sb->s_blocksize = CIFS_MAX_MSGSIZE;
131 sb->s_blocksize_bits = 14; /* default 2**14 = CIFS_MAX_MSGSIZE */
132 inode = cifs_root_iget(sb);
140 sb->s_root = d_alloc_root(inode);
147 /* do that *after* d_alloc_root() - we want NULL ->d_op for root here */
148 if (cifs_sb_master_tcon(cifs_sb)->nocase)
149 sb->s_d_op = &cifs_ci_dentry_ops;
151 sb->s_d_op = &cifs_dentry_ops;
153 #ifdef CIFS_NFSD_EXPORT
154 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
155 cFYI(1, "export ops supported");
156 sb->s_export_op = &cifs_export_ops;
158 #endif /* CIFS_NFSD_EXPORT */
163 cERROR(1, "cifs_read_super: get root inode failed");
170 static void cifs_kill_sb(struct super_block *sb)
172 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
174 cifs_umount(cifs_sb);
178 cifs_statfs(struct dentry *dentry, struct kstatfs *buf)
180 struct super_block *sb = dentry->d_sb;
181 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
182 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
183 int rc = -EOPNOTSUPP;
188 buf->f_type = CIFS_MAGIC_NUMBER;
191 * PATH_MAX may be too long - it would presumably be total path,
192 * but note that some servers (includinng Samba 3) have a shorter
195 * Instead could get the real value via SMB_QUERY_FS_ATTRIBUTE_INFO.
197 buf->f_namelen = PATH_MAX;
198 buf->f_files = 0; /* undefined */
199 buf->f_ffree = 0; /* unlimited */
202 * We could add a second check for a QFS Unix capability bit
204 if ((tcon->ses->capabilities & CAP_UNIX) &&
205 (CIFS_POSIX_EXTENSIONS & le64_to_cpu(tcon->fsUnixInfo.Capability)))
206 rc = CIFSSMBQFSPosixInfo(xid, tcon, buf);
209 * Only need to call the old QFSInfo if failed on newer one,
212 if (rc && (tcon->ses->capabilities & CAP_NT_SMBS))
213 rc = CIFSSMBQFSInfo(xid, tcon, buf);
216 * Some old Windows servers also do not support level 103, retry with
217 * older level one if old server failed the previous call or we
218 * bypassed it because we detected that this was an older LANMAN sess
221 rc = SMBOldQFSInfo(xid, tcon, buf);
227 static int cifs_permission(struct inode *inode, int mask)
229 struct cifs_sb_info *cifs_sb;
231 cifs_sb = CIFS_SB(inode->i_sb);
233 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) {
234 if ((mask & MAY_EXEC) && !execute_ok(inode))
238 } else /* file mode might have been restricted at mount time
239 on the client (above and beyond ACL on servers) for
240 servers which do not support setting and viewing mode bits,
241 so allowing client to check permissions is useful */
242 return generic_permission(inode, mask);
245 static struct kmem_cache *cifs_inode_cachep;
246 static struct kmem_cache *cifs_req_cachep;
247 static struct kmem_cache *cifs_mid_cachep;
248 static struct kmem_cache *cifs_sm_req_cachep;
249 mempool_t *cifs_sm_req_poolp;
250 mempool_t *cifs_req_poolp;
251 mempool_t *cifs_mid_poolp;
253 static struct inode *
254 cifs_alloc_inode(struct super_block *sb)
256 struct cifsInodeInfo *cifs_inode;
257 cifs_inode = kmem_cache_alloc(cifs_inode_cachep, GFP_KERNEL);
260 cifs_inode->cifsAttrs = 0x20; /* default */
261 cifs_inode->time = 0;
262 /* Until the file is open and we have gotten oplock
263 info back from the server, can not assume caching of
264 file data or metadata */
265 cifs_set_oplock_level(cifs_inode, 0);
266 cifs_inode->delete_pending = false;
267 cifs_inode->invalid_mapping = false;
268 cifs_inode->vfs_inode.i_blkbits = 14; /* 2**14 = CIFS_MAX_MSGSIZE */
269 cifs_inode->server_eof = 0;
270 cifs_inode->uniqueid = 0;
271 cifs_inode->createtime = 0;
273 /* Can not set i_flags here - they get immediately overwritten
274 to zero by the VFS */
275 /* cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME;*/
276 INIT_LIST_HEAD(&cifs_inode->openFileList);
277 return &cifs_inode->vfs_inode;
280 static void cifs_i_callback(struct rcu_head *head)
282 struct inode *inode = container_of(head, struct inode, i_rcu);
283 INIT_LIST_HEAD(&inode->i_dentry);
284 kmem_cache_free(cifs_inode_cachep, CIFS_I(inode));
288 cifs_destroy_inode(struct inode *inode)
290 call_rcu(&inode->i_rcu, cifs_i_callback);
294 cifs_evict_inode(struct inode *inode)
296 truncate_inode_pages(&inode->i_data, 0);
297 end_writeback(inode);
298 cifs_fscache_release_inode_cookie(inode);
302 cifs_show_address(struct seq_file *s, struct TCP_Server_Info *server)
304 struct sockaddr_in *sa = (struct sockaddr_in *) &server->dstaddr;
305 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *) &server->dstaddr;
307 seq_printf(s, ",addr=");
309 switch (server->dstaddr.ss_family) {
311 seq_printf(s, "%pI4", &sa->sin_addr.s_addr);
314 seq_printf(s, "%pI6", &sa6->sin6_addr.s6_addr);
315 if (sa6->sin6_scope_id)
316 seq_printf(s, "%%%u", sa6->sin6_scope_id);
319 seq_printf(s, "(unknown)");
324 cifs_show_security(struct seq_file *s, struct TCP_Server_Info *server)
326 seq_printf(s, ",sec=");
328 switch (server->secType) {
330 seq_printf(s, "lanman");
333 seq_printf(s, "ntlmv2");
336 seq_printf(s, "ntlm");
339 seq_printf(s, "krb5");
342 seq_printf(s, "ntlmssp");
345 /* shouldn't ever happen */
346 seq_printf(s, "unknown");
350 if (server->sec_mode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
355 * cifs_show_options() is for displaying mount options in /proc/mounts.
356 * Not all settable options are displayed but most of the important
360 cifs_show_options(struct seq_file *s, struct vfsmount *m)
362 struct cifs_sb_info *cifs_sb = CIFS_SB(m->mnt_sb);
363 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
364 struct sockaddr *srcaddr;
365 srcaddr = (struct sockaddr *)&tcon->ses->server->srcaddr;
367 cifs_show_security(s, tcon->ses->server);
369 seq_printf(s, ",unc=%s", tcon->treeName);
371 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER)
372 seq_printf(s, ",multiuser");
373 else if (tcon->ses->user_name)
374 seq_printf(s, ",username=%s", tcon->ses->user_name);
376 if (tcon->ses->domainName)
377 seq_printf(s, ",domain=%s", tcon->ses->domainName);
379 if (srcaddr->sa_family != AF_UNSPEC) {
380 struct sockaddr_in *saddr4;
381 struct sockaddr_in6 *saddr6;
382 saddr4 = (struct sockaddr_in *)srcaddr;
383 saddr6 = (struct sockaddr_in6 *)srcaddr;
384 if (srcaddr->sa_family == AF_INET6)
385 seq_printf(s, ",srcaddr=%pI6c",
387 else if (srcaddr->sa_family == AF_INET)
388 seq_printf(s, ",srcaddr=%pI4",
389 &saddr4->sin_addr.s_addr);
391 seq_printf(s, ",srcaddr=BAD-AF:%i",
392 (int)(srcaddr->sa_family));
395 seq_printf(s, ",uid=%d", cifs_sb->mnt_uid);
396 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)
397 seq_printf(s, ",forceuid");
399 seq_printf(s, ",noforceuid");
401 seq_printf(s, ",gid=%d", cifs_sb->mnt_gid);
402 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)
403 seq_printf(s, ",forcegid");
405 seq_printf(s, ",noforcegid");
407 cifs_show_address(s, tcon->ses->server);
410 seq_printf(s, ",file_mode=0%o,dir_mode=0%o",
411 cifs_sb->mnt_file_mode,
412 cifs_sb->mnt_dir_mode);
414 seq_printf(s, ",seal");
416 seq_printf(s, ",nocase");
418 seq_printf(s, ",hard");
420 seq_printf(s, ",unix");
422 seq_printf(s, ",nounix");
423 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
424 seq_printf(s, ",posixpaths");
425 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)
426 seq_printf(s, ",setuids");
427 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
428 seq_printf(s, ",serverino");
429 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RWPIDFORWARD)
430 seq_printf(s, ",rwpidforward");
431 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL)
432 seq_printf(s, ",forcemand");
433 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO)
434 seq_printf(s, ",directio");
435 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
436 seq_printf(s, ",nouser_xattr");
437 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR)
438 seq_printf(s, ",mapchars");
439 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)
440 seq_printf(s, ",sfu");
441 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
442 seq_printf(s, ",nobrl");
443 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
444 seq_printf(s, ",cifsacl");
445 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)
446 seq_printf(s, ",dynperm");
447 if (m->mnt_sb->s_flags & MS_POSIXACL)
448 seq_printf(s, ",acl");
449 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS)
450 seq_printf(s, ",mfsymlinks");
451 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_FSCACHE)
452 seq_printf(s, ",fsc");
454 seq_printf(s, ",rsize=%d", cifs_sb->rsize);
455 seq_printf(s, ",wsize=%d", cifs_sb->wsize);
456 /* convert actimeo and display it in seconds */
457 seq_printf(s, ",actimeo=%lu", cifs_sb->actimeo / HZ);
462 static void cifs_umount_begin(struct super_block *sb)
464 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
465 struct cifs_tcon *tcon;
470 tcon = cifs_sb_master_tcon(cifs_sb);
472 spin_lock(&cifs_tcp_ses_lock);
473 if ((tcon->tc_count > 1) || (tcon->tidStatus == CifsExiting)) {
474 /* we have other mounts to same share or we have
475 already tried to force umount this and woken up
476 all waiting network requests, nothing to do */
477 spin_unlock(&cifs_tcp_ses_lock);
479 } else if (tcon->tc_count == 1)
480 tcon->tidStatus = CifsExiting;
481 spin_unlock(&cifs_tcp_ses_lock);
483 /* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */
484 /* cancel_notify_requests(tcon); */
485 if (tcon->ses && tcon->ses->server) {
486 cFYI(1, "wake up tasks now - umount begin not complete");
487 wake_up_all(&tcon->ses->server->request_q);
488 wake_up_all(&tcon->ses->server->response_q);
489 msleep(1); /* yield */
490 /* we have to kick the requests once more */
491 wake_up_all(&tcon->ses->server->response_q);
498 #ifdef CONFIG_CIFS_STATS2
499 static int cifs_show_stats(struct seq_file *s, struct vfsmount *mnt)
506 static int cifs_remount(struct super_block *sb, int *flags, char *data)
508 *flags |= MS_NODIRATIME;
512 static int cifs_drop_inode(struct inode *inode)
514 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
516 /* no serverino => unconditional eviction */
517 return !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) ||
518 generic_drop_inode(inode);
521 static const struct super_operations cifs_super_ops = {
522 .statfs = cifs_statfs,
523 .alloc_inode = cifs_alloc_inode,
524 .destroy_inode = cifs_destroy_inode,
525 .drop_inode = cifs_drop_inode,
526 .evict_inode = cifs_evict_inode,
527 /* .delete_inode = cifs_delete_inode, */ /* Do not need above
528 function unless later we add lazy close of inodes or unless the
529 kernel forgets to call us with the same number of releases (closes)
531 .show_options = cifs_show_options,
532 .umount_begin = cifs_umount_begin,
533 .remount_fs = cifs_remount,
534 #ifdef CONFIG_CIFS_STATS2
535 .show_stats = cifs_show_stats,
540 * Get root dentry from superblock according to prefix path mount option.
541 * Return dentry with refcount + 1 on success and NULL otherwise.
543 static struct dentry *
544 cifs_get_root(struct smb_vol *vol, struct super_block *sb)
546 struct dentry *dentry;
547 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
548 char *full_path = NULL;
553 full_path = cifs_build_path_to_root(vol, cifs_sb,
554 cifs_sb_master_tcon(cifs_sb));
555 if (full_path == NULL)
556 return ERR_PTR(-ENOMEM);
558 cFYI(1, "Get root dentry for %s", full_path);
561 sep = CIFS_DIR_SEP(cifs_sb);
562 dentry = dget(sb->s_root);
566 struct inode *dir = dentry->d_inode;
567 struct dentry *child;
569 /* skip separators */
576 while (*s && *s != sep)
579 mutex_lock(&dir->i_mutex);
580 child = lookup_one_len(p, dentry, s - p);
581 mutex_unlock(&dir->i_mutex);
584 } while (!IS_ERR(dentry));
590 static int cifs_set_super(struct super_block *sb, void *data)
592 struct cifs_mnt_data *mnt_data = data;
593 sb->s_fs_info = mnt_data->cifs_sb;
594 return set_anon_super(sb, NULL);
597 static struct dentry *
598 cifs_do_mount(struct file_system_type *fs_type,
599 int flags, const char *dev_name, void *data)
602 struct super_block *sb;
603 struct cifs_sb_info *cifs_sb;
604 struct smb_vol *volume_info;
605 struct cifs_mnt_data mnt_data;
608 cFYI(1, "Devname: %s flags: %d ", dev_name, flags);
610 volume_info = cifs_get_volume_info((char *)data, dev_name);
611 if (IS_ERR(volume_info))
612 return ERR_CAST(volume_info);
614 cifs_sb = kzalloc(sizeof(struct cifs_sb_info), GFP_KERNEL);
615 if (cifs_sb == NULL) {
616 root = ERR_PTR(-ENOMEM);
620 cifs_sb->mountdata = kstrndup(data, PAGE_SIZE, GFP_KERNEL);
621 if (cifs_sb->mountdata == NULL) {
622 root = ERR_PTR(-ENOMEM);
626 cifs_setup_cifs_sb(volume_info, cifs_sb);
628 rc = cifs_mount(cifs_sb, volume_info);
630 if (!(flags & MS_SILENT))
631 cERROR(1, "cifs_mount failed w/return code = %d", rc);
636 mnt_data.vol = volume_info;
637 mnt_data.cifs_sb = cifs_sb;
638 mnt_data.flags = flags;
640 sb = sget(fs_type, cifs_match_super, cifs_set_super, &mnt_data);
643 cifs_umount(cifs_sb);
648 cFYI(1, "Use existing superblock");
649 cifs_umount(cifs_sb);
652 /* BB should we make this contingent on mount parm? */
653 sb->s_flags |= MS_NODIRATIME | MS_NOATIME;
655 rc = cifs_read_super(sb);
661 sb->s_flags |= MS_ACTIVE;
664 root = cifs_get_root(volume_info, sb);
668 cFYI(1, "dentry root is: %p", root);
672 deactivate_locked_super(sb);
674 cifs_cleanup_volume_info(volume_info);
678 kfree(cifs_sb->mountdata);
682 unload_nls(volume_info->local_nls);
686 static ssize_t cifs_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
687 unsigned long nr_segs, loff_t pos)
689 struct inode *inode = iocb->ki_filp->f_path.dentry->d_inode;
693 written = generic_file_aio_write(iocb, iov, nr_segs, pos);
695 if (CIFS_I(inode)->clientCanCacheAll)
698 rc = filemap_fdatawrite(inode->i_mapping);
700 cFYI(1, "cifs_file_aio_write: %d rc on %p inode", rc, inode);
705 static loff_t cifs_llseek(struct file *file, loff_t offset, int origin)
708 * origin == SEEK_END || SEEK_DATA || SEEK_HOLE => we must revalidate
709 * the cached file length
711 if (origin != SEEK_SET || origin != SEEK_CUR) {
713 struct inode *inode = file->f_path.dentry->d_inode;
716 * We need to be sure that all dirty pages are written and the
717 * server has the newest file length.
719 if (!CIFS_I(inode)->clientCanCacheRead && inode->i_mapping &&
720 inode->i_mapping->nrpages != 0) {
721 rc = filemap_fdatawait(inode->i_mapping);
723 mapping_set_error(inode->i_mapping, rc);
728 * Some applications poll for the file length in this strange
729 * way so we must seek to end on non-oplocked files by
730 * setting the revalidate time to zero.
732 CIFS_I(inode)->time = 0;
734 rc = cifs_revalidate_file_attr(file);
738 return generic_file_llseek_unlocked(file, offset, origin);
741 static int cifs_setlease(struct file *file, long arg, struct file_lock **lease)
743 /* note that this is called by vfs setlease with lock_flocks held
744 to protect *lease from going away */
745 struct inode *inode = file->f_path.dentry->d_inode;
746 struct cifsFileInfo *cfile = file->private_data;
748 if (!(S_ISREG(inode->i_mode)))
751 /* check if file is oplocked */
752 if (((arg == F_RDLCK) &&
753 (CIFS_I(inode)->clientCanCacheRead)) ||
755 (CIFS_I(inode)->clientCanCacheAll)))
756 return generic_setlease(file, arg, lease);
757 else if (tlink_tcon(cfile->tlink)->local_lease &&
758 !CIFS_I(inode)->clientCanCacheRead)
759 /* If the server claims to support oplock on this
760 file, then we still need to check oplock even
761 if the local_lease mount option is set, but there
762 are servers which do not support oplock for which
763 this mount option may be useful if the user
764 knows that the file won't be changed on the server
766 return generic_setlease(file, arg, lease);
771 struct file_system_type cifs_fs_type = {
772 .owner = THIS_MODULE,
774 .mount = cifs_do_mount,
775 .kill_sb = cifs_kill_sb,
778 const struct inode_operations cifs_dir_inode_ops = {
779 .create = cifs_create,
780 .lookup = cifs_lookup,
781 .getattr = cifs_getattr,
782 .unlink = cifs_unlink,
783 .link = cifs_hardlink,
786 .rename = cifs_rename,
787 .permission = cifs_permission,
788 /* revalidate:cifs_revalidate, */
789 .setattr = cifs_setattr,
790 .symlink = cifs_symlink,
792 #ifdef CONFIG_CIFS_XATTR
793 .setxattr = cifs_setxattr,
794 .getxattr = cifs_getxattr,
795 .listxattr = cifs_listxattr,
796 .removexattr = cifs_removexattr,
800 const struct inode_operations cifs_file_inode_ops = {
801 /* revalidate:cifs_revalidate, */
802 .setattr = cifs_setattr,
803 .getattr = cifs_getattr, /* do we need this anymore? */
804 .rename = cifs_rename,
805 .permission = cifs_permission,
806 #ifdef CONFIG_CIFS_XATTR
807 .setxattr = cifs_setxattr,
808 .getxattr = cifs_getxattr,
809 .listxattr = cifs_listxattr,
810 .removexattr = cifs_removexattr,
814 const struct inode_operations cifs_symlink_inode_ops = {
815 .readlink = generic_readlink,
816 .follow_link = cifs_follow_link,
817 .put_link = cifs_put_link,
818 .permission = cifs_permission,
819 /* BB add the following two eventually */
820 /* revalidate: cifs_revalidate,
821 setattr: cifs_notify_change, *//* BB do we need notify change */
822 #ifdef CONFIG_CIFS_XATTR
823 .setxattr = cifs_setxattr,
824 .getxattr = cifs_getxattr,
825 .listxattr = cifs_listxattr,
826 .removexattr = cifs_removexattr,
830 const struct file_operations cifs_file_ops = {
831 .read = do_sync_read,
832 .write = do_sync_write,
833 .aio_read = generic_file_aio_read,
834 .aio_write = cifs_file_aio_write,
836 .release = cifs_close,
840 .mmap = cifs_file_mmap,
841 .splice_read = generic_file_splice_read,
842 .llseek = cifs_llseek,
843 #ifdef CONFIG_CIFS_POSIX
844 .unlocked_ioctl = cifs_ioctl,
845 #endif /* CONFIG_CIFS_POSIX */
846 .setlease = cifs_setlease,
849 const struct file_operations cifs_file_strict_ops = {
850 .read = do_sync_read,
851 .write = do_sync_write,
852 .aio_read = cifs_strict_readv,
853 .aio_write = cifs_strict_writev,
855 .release = cifs_close,
857 .fsync = cifs_strict_fsync,
859 .mmap = cifs_file_strict_mmap,
860 .splice_read = generic_file_splice_read,
861 .llseek = cifs_llseek,
862 #ifdef CONFIG_CIFS_POSIX
863 .unlocked_ioctl = cifs_ioctl,
864 #endif /* CONFIG_CIFS_POSIX */
865 .setlease = cifs_setlease,
868 const struct file_operations cifs_file_direct_ops = {
869 /* BB reevaluate whether they can be done with directio, no cache */
870 .read = do_sync_read,
871 .write = do_sync_write,
872 .aio_read = cifs_user_readv,
873 .aio_write = cifs_user_writev,
875 .release = cifs_close,
879 .mmap = cifs_file_mmap,
880 .splice_read = generic_file_splice_read,
881 #ifdef CONFIG_CIFS_POSIX
882 .unlocked_ioctl = cifs_ioctl,
883 #endif /* CONFIG_CIFS_POSIX */
884 .llseek = cifs_llseek,
885 .setlease = cifs_setlease,
888 const struct file_operations cifs_file_nobrl_ops = {
889 .read = do_sync_read,
890 .write = do_sync_write,
891 .aio_read = generic_file_aio_read,
892 .aio_write = cifs_file_aio_write,
894 .release = cifs_close,
897 .mmap = cifs_file_mmap,
898 .splice_read = generic_file_splice_read,
899 .llseek = cifs_llseek,
900 #ifdef CONFIG_CIFS_POSIX
901 .unlocked_ioctl = cifs_ioctl,
902 #endif /* CONFIG_CIFS_POSIX */
903 .setlease = cifs_setlease,
906 const struct file_operations cifs_file_strict_nobrl_ops = {
907 .read = do_sync_read,
908 .write = do_sync_write,
909 .aio_read = cifs_strict_readv,
910 .aio_write = cifs_strict_writev,
912 .release = cifs_close,
913 .fsync = cifs_strict_fsync,
915 .mmap = cifs_file_strict_mmap,
916 .splice_read = generic_file_splice_read,
917 .llseek = cifs_llseek,
918 #ifdef CONFIG_CIFS_POSIX
919 .unlocked_ioctl = cifs_ioctl,
920 #endif /* CONFIG_CIFS_POSIX */
921 .setlease = cifs_setlease,
924 const struct file_operations cifs_file_direct_nobrl_ops = {
925 /* BB reevaluate whether they can be done with directio, no cache */
926 .read = do_sync_read,
927 .write = do_sync_write,
928 .aio_read = cifs_user_readv,
929 .aio_write = cifs_user_writev,
931 .release = cifs_close,
934 .mmap = cifs_file_mmap,
935 .splice_read = generic_file_splice_read,
936 #ifdef CONFIG_CIFS_POSIX
937 .unlocked_ioctl = cifs_ioctl,
938 #endif /* CONFIG_CIFS_POSIX */
939 .llseek = cifs_llseek,
940 .setlease = cifs_setlease,
943 const struct file_operations cifs_dir_ops = {
944 .readdir = cifs_readdir,
945 .release = cifs_closedir,
946 .read = generic_read_dir,
947 .unlocked_ioctl = cifs_ioctl,
948 .llseek = generic_file_llseek,
952 cifs_init_once(void *inode)
954 struct cifsInodeInfo *cifsi = inode;
956 inode_init_once(&cifsi->vfs_inode);
957 INIT_LIST_HEAD(&cifsi->lockList);
961 cifs_init_inodecache(void)
963 cifs_inode_cachep = kmem_cache_create("cifs_inode_cache",
964 sizeof(struct cifsInodeInfo),
965 0, (SLAB_RECLAIM_ACCOUNT|
968 if (cifs_inode_cachep == NULL)
975 cifs_destroy_inodecache(void)
977 kmem_cache_destroy(cifs_inode_cachep);
981 cifs_init_request_bufs(void)
983 if (CIFSMaxBufSize < 8192) {
984 /* Buffer size can not be smaller than 2 * PATH_MAX since maximum
985 Unicode path name has to fit in any SMB/CIFS path based frames */
986 CIFSMaxBufSize = 8192;
987 } else if (CIFSMaxBufSize > 1024*127) {
988 CIFSMaxBufSize = 1024 * 127;
990 CIFSMaxBufSize &= 0x1FE00; /* Round size to even 512 byte mult*/
992 /* cERROR(1, "CIFSMaxBufSize %d 0x%x",CIFSMaxBufSize,CIFSMaxBufSize); */
993 cifs_req_cachep = kmem_cache_create("cifs_request",
995 MAX_CIFS_HDR_SIZE, 0,
996 SLAB_HWCACHE_ALIGN, NULL);
997 if (cifs_req_cachep == NULL)
1000 if (cifs_min_rcv < 1)
1002 else if (cifs_min_rcv > 64) {
1004 cERROR(1, "cifs_min_rcv set to maximum (64)");
1007 cifs_req_poolp = mempool_create_slab_pool(cifs_min_rcv,
1010 if (cifs_req_poolp == NULL) {
1011 kmem_cache_destroy(cifs_req_cachep);
1014 /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and
1015 almost all handle based requests (but not write response, nor is it
1016 sufficient for path based requests). A smaller size would have
1017 been more efficient (compacting multiple slab items on one 4k page)
1018 for the case in which debug was on, but this larger size allows
1019 more SMBs to use small buffer alloc and is still much more
1020 efficient to alloc 1 per page off the slab compared to 17K (5page)
1021 alloc of large cifs buffers even when page debugging is on */
1022 cifs_sm_req_cachep = kmem_cache_create("cifs_small_rq",
1023 MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN,
1025 if (cifs_sm_req_cachep == NULL) {
1026 mempool_destroy(cifs_req_poolp);
1027 kmem_cache_destroy(cifs_req_cachep);
1031 if (cifs_min_small < 2)
1033 else if (cifs_min_small > 256) {
1034 cifs_min_small = 256;
1035 cFYI(1, "cifs_min_small set to maximum (256)");
1038 cifs_sm_req_poolp = mempool_create_slab_pool(cifs_min_small,
1039 cifs_sm_req_cachep);
1041 if (cifs_sm_req_poolp == NULL) {
1042 mempool_destroy(cifs_req_poolp);
1043 kmem_cache_destroy(cifs_req_cachep);
1044 kmem_cache_destroy(cifs_sm_req_cachep);
1052 cifs_destroy_request_bufs(void)
1054 mempool_destroy(cifs_req_poolp);
1055 kmem_cache_destroy(cifs_req_cachep);
1056 mempool_destroy(cifs_sm_req_poolp);
1057 kmem_cache_destroy(cifs_sm_req_cachep);
1061 cifs_init_mids(void)
1063 cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids",
1064 sizeof(struct mid_q_entry), 0,
1065 SLAB_HWCACHE_ALIGN, NULL);
1066 if (cifs_mid_cachep == NULL)
1069 /* 3 is a reasonable minimum number of simultaneous operations */
1070 cifs_mid_poolp = mempool_create_slab_pool(3, cifs_mid_cachep);
1071 if (cifs_mid_poolp == NULL) {
1072 kmem_cache_destroy(cifs_mid_cachep);
1080 cifs_destroy_mids(void)
1082 mempool_destroy(cifs_mid_poolp);
1083 kmem_cache_destroy(cifs_mid_cachep);
1091 INIT_LIST_HEAD(&cifs_tcp_ses_list);
1092 #ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
1093 INIT_LIST_HEAD(&GlobalDnotifyReqList);
1094 INIT_LIST_HEAD(&GlobalDnotifyRsp_Q);
1095 #endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
1097 * Initialize Global counters
1099 atomic_set(&sesInfoAllocCount, 0);
1100 atomic_set(&tconInfoAllocCount, 0);
1101 atomic_set(&tcpSesAllocCount, 0);
1102 atomic_set(&tcpSesReconnectCount, 0);
1103 atomic_set(&tconInfoReconnectCount, 0);
1105 atomic_set(&bufAllocCount, 0);
1106 atomic_set(&smBufAllocCount, 0);
1107 #ifdef CONFIG_CIFS_STATS2
1108 atomic_set(&totBufAllocCount, 0);
1109 atomic_set(&totSmBufAllocCount, 0);
1110 #endif /* CONFIG_CIFS_STATS2 */
1112 atomic_set(&midCount, 0);
1113 GlobalCurrentXid = 0;
1114 GlobalTotalActiveXid = 0;
1115 GlobalMaxActiveXid = 0;
1116 spin_lock_init(&cifs_tcp_ses_lock);
1117 spin_lock_init(&cifs_file_list_lock);
1118 spin_lock_init(&GlobalMid_Lock);
1120 if (cifs_max_pending < 2) {
1121 cifs_max_pending = 2;
1122 cFYI(1, "cifs_max_pending set to min of 2");
1123 } else if (cifs_max_pending > 256) {
1124 cifs_max_pending = 256;
1125 cFYI(1, "cifs_max_pending set to max of 256");
1128 rc = cifs_fscache_register();
1130 goto out_clean_proc;
1132 rc = cifs_init_inodecache();
1134 goto out_unreg_fscache;
1136 rc = cifs_init_mids();
1138 goto out_destroy_inodecache;
1140 rc = cifs_init_request_bufs();
1142 goto out_destroy_mids;
1144 #ifdef CONFIG_CIFS_UPCALL
1145 rc = register_key_type(&cifs_spnego_key_type);
1147 goto out_destroy_request_bufs;
1148 #endif /* CONFIG_CIFS_UPCALL */
1150 #ifdef CONFIG_CIFS_ACL
1151 rc = init_cifs_idmap();
1153 goto out_register_key_type;
1154 #endif /* CONFIG_CIFS_ACL */
1156 rc = register_filesystem(&cifs_fs_type);
1158 goto out_init_cifs_idmap;
1162 out_init_cifs_idmap:
1163 #ifdef CONFIG_CIFS_ACL
1165 out_register_key_type:
1167 #ifdef CONFIG_CIFS_UPCALL
1168 unregister_key_type(&cifs_spnego_key_type);
1169 out_destroy_request_bufs:
1171 cifs_destroy_request_bufs();
1173 cifs_destroy_mids();
1174 out_destroy_inodecache:
1175 cifs_destroy_inodecache();
1177 cifs_fscache_unregister();
1186 cFYI(DBG2, "exit_cifs");
1188 cifs_fscache_unregister();
1189 #ifdef CONFIG_CIFS_DFS_UPCALL
1190 cifs_dfs_release_automount_timer();
1192 #ifdef CONFIG_CIFS_ACL
1193 cifs_destroy_idmaptrees();
1196 #ifdef CONFIG_CIFS_UPCALL
1197 unregister_key_type(&cifs_spnego_key_type);
1199 unregister_filesystem(&cifs_fs_type);
1200 cifs_destroy_inodecache();
1201 cifs_destroy_mids();
1202 cifs_destroy_request_bufs();
1206 MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */
1208 ("VFS to access servers complying with the SNIA CIFS Specification "
1209 "e.g. Samba and Windows");
1210 MODULE_VERSION(CIFS_VERSION);
1211 module_init(init_cifs)
1212 module_exit(exit_cifs)