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>
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 #ifdef CONFIG_CIFS_SMB2
58 bool enable_oplocks = true;
59 unsigned int linuxExtEnabled = 1;
60 unsigned int lookupCacheEnabled = 1;
61 unsigned int global_secflags = CIFSSEC_DEF;
62 /* unsigned int ntlmv2_support = 0; */
63 unsigned int sign_CIFS_PDUs = 1;
64 static const struct super_operations cifs_super_ops;
65 unsigned int CIFSMaxBufSize = CIFS_MAX_MSGSIZE;
66 module_param(CIFSMaxBufSize, int, 0);
67 MODULE_PARM_DESC(CIFSMaxBufSize, "Network buffer size (not including header). "
68 "Default: 16384 Range: 8192 to 130048");
69 unsigned int cifs_min_rcv = CIFS_MIN_RCV_POOL;
70 module_param(cifs_min_rcv, int, 0);
71 MODULE_PARM_DESC(cifs_min_rcv, "Network buffers in pool. Default: 4 Range: "
73 unsigned int cifs_min_small = 30;
74 module_param(cifs_min_small, int, 0);
75 MODULE_PARM_DESC(cifs_min_small, "Small network buffers in pool. Default: 30 "
77 unsigned int cifs_max_pending = CIFS_MAX_REQ;
78 module_param(cifs_max_pending, int, 0444);
79 MODULE_PARM_DESC(cifs_max_pending, "Simultaneous requests to server. "
80 "Default: 32767 Range: 2 to 32767.");
81 module_param(enable_oplocks, bool, 0644);
82 MODULE_PARM_DESC(enable_oplocks, "Enable or disable oplocks (bool). Default:"
85 extern mempool_t *cifs_sm_req_poolp;
86 extern mempool_t *cifs_req_poolp;
87 extern mempool_t *cifs_mid_poolp;
89 struct workqueue_struct *cifsiod_wq;
92 cifs_read_super(struct super_block *sb)
95 struct cifs_sb_info *cifs_sb;
98 cifs_sb = CIFS_SB(sb);
100 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIXACL)
101 sb->s_flags |= MS_POSIXACL;
103 if (cifs_sb_master_tcon(cifs_sb)->ses->capabilities & CAP_LARGE_FILES)
104 sb->s_maxbytes = MAX_LFS_FILESIZE;
106 sb->s_maxbytes = MAX_NON_LFS;
108 /* BB FIXME fix time_gran to be larger for LANMAN sessions */
109 sb->s_time_gran = 100;
111 sb->s_magic = CIFS_MAGIC_NUMBER;
112 sb->s_op = &cifs_super_ops;
113 sb->s_bdi = &cifs_sb->bdi;
114 sb->s_blocksize = CIFS_MAX_MSGSIZE;
115 sb->s_blocksize_bits = 14; /* default 2**14 = CIFS_MAX_MSGSIZE */
116 inode = cifs_root_iget(sb);
123 sb->s_root = d_make_root(inode);
129 /* do that *after* d_make_root() - we want NULL ->d_op for root here */
130 if (cifs_sb_master_tcon(cifs_sb)->nocase)
131 sb->s_d_op = &cifs_ci_dentry_ops;
133 sb->s_d_op = &cifs_dentry_ops;
135 #ifdef CONFIG_CIFS_NFSD_EXPORT
136 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
137 cFYI(1, "export ops supported");
138 sb->s_export_op = &cifs_export_ops;
140 #endif /* CONFIG_CIFS_NFSD_EXPORT */
145 cERROR(1, "cifs_read_super: get root inode failed");
149 static void cifs_kill_sb(struct super_block *sb)
151 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
153 cifs_umount(cifs_sb);
157 cifs_statfs(struct dentry *dentry, struct kstatfs *buf)
159 struct super_block *sb = dentry->d_sb;
160 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
161 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
162 struct TCP_Server_Info *server = tcon->ses->server;
169 * PATH_MAX may be too long - it would presumably be total path,
170 * but note that some servers (includinng Samba 3) have a shorter
173 * Instead could get the real value via SMB_QUERY_FS_ATTRIBUTE_INFO.
175 buf->f_namelen = PATH_MAX;
176 buf->f_files = 0; /* undefined */
177 buf->f_ffree = 0; /* unlimited */
179 if (server->ops->queryfs)
180 rc = server->ops->queryfs(xid, tcon, buf);
186 static int cifs_permission(struct inode *inode, int mask)
188 struct cifs_sb_info *cifs_sb;
190 cifs_sb = CIFS_SB(inode->i_sb);
192 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) {
193 if ((mask & MAY_EXEC) && !execute_ok(inode))
197 } else /* file mode might have been restricted at mount time
198 on the client (above and beyond ACL on servers) for
199 servers which do not support setting and viewing mode bits,
200 so allowing client to check permissions is useful */
201 return generic_permission(inode, mask);
204 static struct kmem_cache *cifs_inode_cachep;
205 static struct kmem_cache *cifs_req_cachep;
206 static struct kmem_cache *cifs_mid_cachep;
207 static struct kmem_cache *cifs_sm_req_cachep;
208 mempool_t *cifs_sm_req_poolp;
209 mempool_t *cifs_req_poolp;
210 mempool_t *cifs_mid_poolp;
212 static struct inode *
213 cifs_alloc_inode(struct super_block *sb)
215 struct cifsInodeInfo *cifs_inode;
216 cifs_inode = kmem_cache_alloc(cifs_inode_cachep, GFP_KERNEL);
219 cifs_inode->cifsAttrs = 0x20; /* default */
220 cifs_inode->time = 0;
221 /* Until the file is open and we have gotten oplock
222 info back from the server, can not assume caching of
223 file data or metadata */
224 cifs_set_oplock_level(cifs_inode, 0);
225 cifs_inode->delete_pending = false;
226 cifs_inode->invalid_mapping = false;
227 cifs_inode->vfs_inode.i_blkbits = 14; /* 2**14 = CIFS_MAX_MSGSIZE */
228 cifs_inode->server_eof = 0;
229 cifs_inode->uniqueid = 0;
230 cifs_inode->createtime = 0;
232 /* Can not set i_flags here - they get immediately overwritten
233 to zero by the VFS */
234 /* cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME;*/
235 INIT_LIST_HEAD(&cifs_inode->openFileList);
236 INIT_LIST_HEAD(&cifs_inode->llist);
237 return &cifs_inode->vfs_inode;
240 static void cifs_i_callback(struct rcu_head *head)
242 struct inode *inode = container_of(head, struct inode, i_rcu);
243 kmem_cache_free(cifs_inode_cachep, CIFS_I(inode));
247 cifs_destroy_inode(struct inode *inode)
249 call_rcu(&inode->i_rcu, cifs_i_callback);
253 cifs_evict_inode(struct inode *inode)
255 truncate_inode_pages(&inode->i_data, 0);
257 cifs_fscache_release_inode_cookie(inode);
261 cifs_show_address(struct seq_file *s, struct TCP_Server_Info *server)
263 struct sockaddr_in *sa = (struct sockaddr_in *) &server->dstaddr;
264 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *) &server->dstaddr;
266 seq_printf(s, ",addr=");
268 switch (server->dstaddr.ss_family) {
270 seq_printf(s, "%pI4", &sa->sin_addr.s_addr);
273 seq_printf(s, "%pI6", &sa6->sin6_addr.s6_addr);
274 if (sa6->sin6_scope_id)
275 seq_printf(s, "%%%u", sa6->sin6_scope_id);
278 seq_printf(s, "(unknown)");
283 cifs_show_security(struct seq_file *s, struct TCP_Server_Info *server)
285 seq_printf(s, ",sec=");
287 switch (server->secType) {
289 seq_printf(s, "lanman");
292 seq_printf(s, "ntlmv2");
295 seq_printf(s, "ntlm");
298 seq_printf(s, "krb5");
301 seq_printf(s, "ntlmssp");
304 /* shouldn't ever happen */
305 seq_printf(s, "unknown");
309 if (server->sec_mode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
314 cifs_show_cache_flavor(struct seq_file *s, struct cifs_sb_info *cifs_sb)
316 seq_printf(s, ",cache=");
318 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_STRICT_IO)
319 seq_printf(s, "strict");
320 else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO)
321 seq_printf(s, "none");
323 seq_printf(s, "loose");
327 * cifs_show_options() is for displaying mount options in /proc/mounts.
328 * Not all settable options are displayed but most of the important
332 cifs_show_options(struct seq_file *s, struct dentry *root)
334 struct cifs_sb_info *cifs_sb = CIFS_SB(root->d_sb);
335 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
336 struct sockaddr *srcaddr;
337 srcaddr = (struct sockaddr *)&tcon->ses->server->srcaddr;
339 seq_printf(s, ",vers=%s", tcon->ses->server->vals->version_string);
340 cifs_show_security(s, tcon->ses->server);
341 cifs_show_cache_flavor(s, cifs_sb);
343 seq_printf(s, ",unc=%s", tcon->treeName);
345 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER)
346 seq_printf(s, ",multiuser");
347 else if (tcon->ses->user_name)
348 seq_printf(s, ",username=%s", tcon->ses->user_name);
350 if (tcon->ses->domainName)
351 seq_printf(s, ",domain=%s", tcon->ses->domainName);
353 if (srcaddr->sa_family != AF_UNSPEC) {
354 struct sockaddr_in *saddr4;
355 struct sockaddr_in6 *saddr6;
356 saddr4 = (struct sockaddr_in *)srcaddr;
357 saddr6 = (struct sockaddr_in6 *)srcaddr;
358 if (srcaddr->sa_family == AF_INET6)
359 seq_printf(s, ",srcaddr=%pI6c",
361 else if (srcaddr->sa_family == AF_INET)
362 seq_printf(s, ",srcaddr=%pI4",
363 &saddr4->sin_addr.s_addr);
365 seq_printf(s, ",srcaddr=BAD-AF:%i",
366 (int)(srcaddr->sa_family));
369 seq_printf(s, ",uid=%u", cifs_sb->mnt_uid);
370 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)
371 seq_printf(s, ",forceuid");
373 seq_printf(s, ",noforceuid");
375 seq_printf(s, ",gid=%u", cifs_sb->mnt_gid);
376 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)
377 seq_printf(s, ",forcegid");
379 seq_printf(s, ",noforcegid");
381 cifs_show_address(s, tcon->ses->server);
384 seq_printf(s, ",file_mode=0%ho,dir_mode=0%ho",
385 cifs_sb->mnt_file_mode,
386 cifs_sb->mnt_dir_mode);
388 seq_printf(s, ",seal");
390 seq_printf(s, ",nocase");
392 seq_printf(s, ",hard");
394 seq_printf(s, ",unix");
396 seq_printf(s, ",nounix");
397 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
398 seq_printf(s, ",posixpaths");
399 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)
400 seq_printf(s, ",setuids");
401 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
402 seq_printf(s, ",serverino");
403 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RWPIDFORWARD)
404 seq_printf(s, ",rwpidforward");
405 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL)
406 seq_printf(s, ",forcemand");
407 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
408 seq_printf(s, ",nouser_xattr");
409 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR)
410 seq_printf(s, ",mapchars");
411 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)
412 seq_printf(s, ",sfu");
413 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
414 seq_printf(s, ",nobrl");
415 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
416 seq_printf(s, ",cifsacl");
417 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)
418 seq_printf(s, ",dynperm");
419 if (root->d_sb->s_flags & MS_POSIXACL)
420 seq_printf(s, ",acl");
421 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS)
422 seq_printf(s, ",mfsymlinks");
423 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_FSCACHE)
424 seq_printf(s, ",fsc");
425 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOSSYNC)
426 seq_printf(s, ",nostrictsync");
427 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM)
428 seq_printf(s, ",noperm");
429 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_BACKUPUID)
430 seq_printf(s, ",backupuid=%u", cifs_sb->mnt_backupuid);
431 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_BACKUPGID)
432 seq_printf(s, ",backupgid=%u", cifs_sb->mnt_backupgid);
434 seq_printf(s, ",rsize=%u", cifs_sb->rsize);
435 seq_printf(s, ",wsize=%u", cifs_sb->wsize);
436 /* convert actimeo and display it in seconds */
437 seq_printf(s, ",actimeo=%lu", cifs_sb->actimeo / HZ);
442 static void cifs_umount_begin(struct super_block *sb)
444 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
445 struct cifs_tcon *tcon;
450 tcon = cifs_sb_master_tcon(cifs_sb);
452 spin_lock(&cifs_tcp_ses_lock);
453 if ((tcon->tc_count > 1) || (tcon->tidStatus == CifsExiting)) {
454 /* we have other mounts to same share or we have
455 already tried to force umount this and woken up
456 all waiting network requests, nothing to do */
457 spin_unlock(&cifs_tcp_ses_lock);
459 } else if (tcon->tc_count == 1)
460 tcon->tidStatus = CifsExiting;
461 spin_unlock(&cifs_tcp_ses_lock);
463 /* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */
464 /* cancel_notify_requests(tcon); */
465 if (tcon->ses && tcon->ses->server) {
466 cFYI(1, "wake up tasks now - umount begin not complete");
467 wake_up_all(&tcon->ses->server->request_q);
468 wake_up_all(&tcon->ses->server->response_q);
469 msleep(1); /* yield */
470 /* we have to kick the requests once more */
471 wake_up_all(&tcon->ses->server->response_q);
478 #ifdef CONFIG_CIFS_STATS2
479 static int cifs_show_stats(struct seq_file *s, struct dentry *root)
486 static int cifs_remount(struct super_block *sb, int *flags, char *data)
488 *flags |= MS_NODIRATIME;
492 static int cifs_drop_inode(struct inode *inode)
494 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
496 /* no serverino => unconditional eviction */
497 return !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) ||
498 generic_drop_inode(inode);
501 static const struct super_operations cifs_super_ops = {
502 .statfs = cifs_statfs,
503 .alloc_inode = cifs_alloc_inode,
504 .destroy_inode = cifs_destroy_inode,
505 .drop_inode = cifs_drop_inode,
506 .evict_inode = cifs_evict_inode,
507 /* .delete_inode = cifs_delete_inode, */ /* Do not need above
508 function unless later we add lazy close of inodes or unless the
509 kernel forgets to call us with the same number of releases (closes)
511 .show_options = cifs_show_options,
512 .umount_begin = cifs_umount_begin,
513 .remount_fs = cifs_remount,
514 #ifdef CONFIG_CIFS_STATS2
515 .show_stats = cifs_show_stats,
520 * Get root dentry from superblock according to prefix path mount option.
521 * Return dentry with refcount + 1 on success and NULL otherwise.
523 static struct dentry *
524 cifs_get_root(struct smb_vol *vol, struct super_block *sb)
526 struct dentry *dentry;
527 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
528 char *full_path = NULL;
532 full_path = build_path_to_root(vol, cifs_sb,
533 cifs_sb_master_tcon(cifs_sb));
534 if (full_path == NULL)
535 return ERR_PTR(-ENOMEM);
537 cFYI(1, "Get root dentry for %s", full_path);
539 sep = CIFS_DIR_SEP(cifs_sb);
540 dentry = dget(sb->s_root);
544 struct inode *dir = dentry->d_inode;
545 struct dentry *child;
549 dentry = ERR_PTR(-ENOENT);
553 /* skip separators */
560 while (*s && *s != sep)
563 mutex_lock(&dir->i_mutex);
564 child = lookup_one_len(p, dentry, s - p);
565 mutex_unlock(&dir->i_mutex);
568 } while (!IS_ERR(dentry));
573 static int cifs_set_super(struct super_block *sb, void *data)
575 struct cifs_mnt_data *mnt_data = data;
576 sb->s_fs_info = mnt_data->cifs_sb;
577 return set_anon_super(sb, NULL);
580 static struct dentry *
581 cifs_do_mount(struct file_system_type *fs_type,
582 int flags, const char *dev_name, void *data)
585 struct super_block *sb;
586 struct cifs_sb_info *cifs_sb;
587 struct smb_vol *volume_info;
588 struct cifs_mnt_data mnt_data;
591 cFYI(1, "Devname: %s flags: %d ", dev_name, flags);
593 volume_info = cifs_get_volume_info((char *)data, dev_name);
594 if (IS_ERR(volume_info))
595 return ERR_CAST(volume_info);
597 cifs_sb = kzalloc(sizeof(struct cifs_sb_info), GFP_KERNEL);
598 if (cifs_sb == NULL) {
599 root = ERR_PTR(-ENOMEM);
603 cifs_sb->mountdata = kstrndup(data, PAGE_SIZE, GFP_KERNEL);
604 if (cifs_sb->mountdata == NULL) {
605 root = ERR_PTR(-ENOMEM);
609 cifs_setup_cifs_sb(volume_info, cifs_sb);
611 rc = cifs_mount(cifs_sb, volume_info);
613 if (!(flags & MS_SILENT))
614 cERROR(1, "cifs_mount failed w/return code = %d", rc);
619 mnt_data.vol = volume_info;
620 mnt_data.cifs_sb = cifs_sb;
621 mnt_data.flags = flags;
623 /* BB should we make this contingent on mount parm? */
624 flags |= MS_NODIRATIME | MS_NOATIME;
626 sb = sget(fs_type, cifs_match_super, cifs_set_super, flags, &mnt_data);
629 cifs_umount(cifs_sb);
634 cFYI(1, "Use existing superblock");
635 cifs_umount(cifs_sb);
637 rc = cifs_read_super(sb);
643 sb->s_flags |= MS_ACTIVE;
646 root = cifs_get_root(volume_info, sb);
650 cFYI(1, "dentry root is: %p", root);
654 deactivate_locked_super(sb);
656 cifs_cleanup_volume_info(volume_info);
660 kfree(cifs_sb->mountdata);
664 unload_nls(volume_info->local_nls);
668 static ssize_t cifs_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
669 unsigned long nr_segs, loff_t pos)
671 struct inode *inode = iocb->ki_filp->f_path.dentry->d_inode;
675 written = generic_file_aio_write(iocb, iov, nr_segs, pos);
677 if (CIFS_I(inode)->clientCanCacheAll)
680 rc = filemap_fdatawrite(inode->i_mapping);
682 cFYI(1, "cifs_file_aio_write: %d rc on %p inode", rc, inode);
687 static loff_t cifs_llseek(struct file *file, loff_t offset, int origin)
690 * origin == SEEK_END || SEEK_DATA || SEEK_HOLE => we must revalidate
691 * the cached file length
693 if (origin != SEEK_SET && origin != SEEK_CUR) {
695 struct inode *inode = file->f_path.dentry->d_inode;
698 * We need to be sure that all dirty pages are written and the
699 * server has the newest file length.
701 if (!CIFS_I(inode)->clientCanCacheRead && inode->i_mapping &&
702 inode->i_mapping->nrpages != 0) {
703 rc = filemap_fdatawait(inode->i_mapping);
705 mapping_set_error(inode->i_mapping, rc);
710 * Some applications poll for the file length in this strange
711 * way so we must seek to end on non-oplocked files by
712 * setting the revalidate time to zero.
714 CIFS_I(inode)->time = 0;
716 rc = cifs_revalidate_file_attr(file);
720 return generic_file_llseek(file, offset, origin);
723 static int cifs_setlease(struct file *file, long arg, struct file_lock **lease)
725 /* note that this is called by vfs setlease with lock_flocks held
726 to protect *lease from going away */
727 struct inode *inode = file->f_path.dentry->d_inode;
728 struct cifsFileInfo *cfile = file->private_data;
730 if (!(S_ISREG(inode->i_mode)))
733 /* check if file is oplocked */
734 if (((arg == F_RDLCK) &&
735 (CIFS_I(inode)->clientCanCacheRead)) ||
737 (CIFS_I(inode)->clientCanCacheAll)))
738 return generic_setlease(file, arg, lease);
739 else if (tlink_tcon(cfile->tlink)->local_lease &&
740 !CIFS_I(inode)->clientCanCacheRead)
741 /* If the server claims to support oplock on this
742 file, then we still need to check oplock even
743 if the local_lease mount option is set, but there
744 are servers which do not support oplock for which
745 this mount option may be useful if the user
746 knows that the file won't be changed on the server
748 return generic_setlease(file, arg, lease);
753 struct file_system_type cifs_fs_type = {
754 .owner = THIS_MODULE,
756 .mount = cifs_do_mount,
757 .kill_sb = cifs_kill_sb,
760 const struct inode_operations cifs_dir_inode_ops = {
761 .create = cifs_create,
762 .atomic_open = cifs_atomic_open,
763 .lookup = cifs_lookup,
764 .getattr = cifs_getattr,
765 .unlink = cifs_unlink,
766 .link = cifs_hardlink,
769 .rename = cifs_rename,
770 .permission = cifs_permission,
771 /* revalidate:cifs_revalidate, */
772 .setattr = cifs_setattr,
773 .symlink = cifs_symlink,
775 #ifdef CONFIG_CIFS_XATTR
776 .setxattr = cifs_setxattr,
777 .getxattr = cifs_getxattr,
778 .listxattr = cifs_listxattr,
779 .removexattr = cifs_removexattr,
783 const struct inode_operations cifs_file_inode_ops = {
784 /* revalidate:cifs_revalidate, */
785 .setattr = cifs_setattr,
786 .getattr = cifs_getattr, /* do we need this anymore? */
787 .rename = cifs_rename,
788 .permission = cifs_permission,
789 #ifdef CONFIG_CIFS_XATTR
790 .setxattr = cifs_setxattr,
791 .getxattr = cifs_getxattr,
792 .listxattr = cifs_listxattr,
793 .removexattr = cifs_removexattr,
797 const struct inode_operations cifs_symlink_inode_ops = {
798 .readlink = generic_readlink,
799 .follow_link = cifs_follow_link,
800 .put_link = cifs_put_link,
801 .permission = cifs_permission,
802 /* BB add the following two eventually */
803 /* revalidate: cifs_revalidate,
804 setattr: cifs_notify_change, *//* BB do we need notify change */
805 #ifdef CONFIG_CIFS_XATTR
806 .setxattr = cifs_setxattr,
807 .getxattr = cifs_getxattr,
808 .listxattr = cifs_listxattr,
809 .removexattr = cifs_removexattr,
813 const struct file_operations cifs_file_ops = {
814 .read = do_sync_read,
815 .write = do_sync_write,
816 .aio_read = generic_file_aio_read,
817 .aio_write = cifs_file_aio_write,
819 .release = cifs_close,
823 .mmap = cifs_file_mmap,
824 .splice_read = generic_file_splice_read,
825 .llseek = cifs_llseek,
826 #ifdef CONFIG_CIFS_POSIX
827 .unlocked_ioctl = cifs_ioctl,
828 #endif /* CONFIG_CIFS_POSIX */
829 .setlease = cifs_setlease,
832 const struct file_operations cifs_file_strict_ops = {
833 .read = do_sync_read,
834 .write = do_sync_write,
835 .aio_read = cifs_strict_readv,
836 .aio_write = cifs_strict_writev,
838 .release = cifs_close,
840 .fsync = cifs_strict_fsync,
842 .mmap = cifs_file_strict_mmap,
843 .splice_read = generic_file_splice_read,
844 .llseek = cifs_llseek,
845 #ifdef CONFIG_CIFS_POSIX
846 .unlocked_ioctl = cifs_ioctl,
847 #endif /* CONFIG_CIFS_POSIX */
848 .setlease = cifs_setlease,
851 const struct file_operations cifs_file_direct_ops = {
852 /* BB reevaluate whether they can be done with directio, no cache */
853 .read = do_sync_read,
854 .write = do_sync_write,
855 .aio_read = cifs_user_readv,
856 .aio_write = cifs_user_writev,
858 .release = cifs_close,
862 .mmap = cifs_file_mmap,
863 .splice_read = generic_file_splice_read,
864 #ifdef CONFIG_CIFS_POSIX
865 .unlocked_ioctl = cifs_ioctl,
866 #endif /* CONFIG_CIFS_POSIX */
867 .llseek = cifs_llseek,
868 .setlease = cifs_setlease,
871 const struct file_operations cifs_file_nobrl_ops = {
872 .read = do_sync_read,
873 .write = do_sync_write,
874 .aio_read = generic_file_aio_read,
875 .aio_write = cifs_file_aio_write,
877 .release = cifs_close,
880 .mmap = cifs_file_mmap,
881 .splice_read = generic_file_splice_read,
882 .llseek = cifs_llseek,
883 #ifdef CONFIG_CIFS_POSIX
884 .unlocked_ioctl = cifs_ioctl,
885 #endif /* CONFIG_CIFS_POSIX */
886 .setlease = cifs_setlease,
889 const struct file_operations cifs_file_strict_nobrl_ops = {
890 .read = do_sync_read,
891 .write = do_sync_write,
892 .aio_read = cifs_strict_readv,
893 .aio_write = cifs_strict_writev,
895 .release = cifs_close,
896 .fsync = cifs_strict_fsync,
898 .mmap = cifs_file_strict_mmap,
899 .splice_read = generic_file_splice_read,
900 .llseek = cifs_llseek,
901 #ifdef CONFIG_CIFS_POSIX
902 .unlocked_ioctl = cifs_ioctl,
903 #endif /* CONFIG_CIFS_POSIX */
904 .setlease = cifs_setlease,
907 const struct file_operations cifs_file_direct_nobrl_ops = {
908 /* BB reevaluate whether they can be done with directio, no cache */
909 .read = do_sync_read,
910 .write = do_sync_write,
911 .aio_read = cifs_user_readv,
912 .aio_write = cifs_user_writev,
914 .release = cifs_close,
917 .mmap = cifs_file_mmap,
918 .splice_read = generic_file_splice_read,
919 #ifdef CONFIG_CIFS_POSIX
920 .unlocked_ioctl = cifs_ioctl,
921 #endif /* CONFIG_CIFS_POSIX */
922 .llseek = cifs_llseek,
923 .setlease = cifs_setlease,
926 const struct file_operations cifs_dir_ops = {
927 .readdir = cifs_readdir,
928 .release = cifs_closedir,
929 .read = generic_read_dir,
930 .unlocked_ioctl = cifs_ioctl,
931 .llseek = generic_file_llseek,
935 cifs_init_once(void *inode)
937 struct cifsInodeInfo *cifsi = inode;
939 inode_init_once(&cifsi->vfs_inode);
940 init_rwsem(&cifsi->lock_sem);
944 cifs_init_inodecache(void)
946 cifs_inode_cachep = kmem_cache_create("cifs_inode_cache",
947 sizeof(struct cifsInodeInfo),
948 0, (SLAB_RECLAIM_ACCOUNT|
951 if (cifs_inode_cachep == NULL)
958 cifs_destroy_inodecache(void)
960 kmem_cache_destroy(cifs_inode_cachep);
964 cifs_init_request_bufs(void)
966 size_t max_hdr_size = MAX_CIFS_HDR_SIZE;
967 #ifdef CONFIG_CIFS_SMB2
969 * SMB2 maximum header size is bigger than CIFS one - no problems to
970 * allocate some more bytes for CIFS.
972 max_hdr_size = MAX_SMB2_HDR_SIZE;
974 if (CIFSMaxBufSize < 8192) {
975 /* Buffer size can not be smaller than 2 * PATH_MAX since maximum
976 Unicode path name has to fit in any SMB/CIFS path based frames */
977 CIFSMaxBufSize = 8192;
978 } else if (CIFSMaxBufSize > 1024*127) {
979 CIFSMaxBufSize = 1024 * 127;
981 CIFSMaxBufSize &= 0x1FE00; /* Round size to even 512 byte mult*/
983 /* cERROR(1, "CIFSMaxBufSize %d 0x%x",CIFSMaxBufSize,CIFSMaxBufSize); */
984 cifs_req_cachep = kmem_cache_create("cifs_request",
985 CIFSMaxBufSize + max_hdr_size, 0,
986 SLAB_HWCACHE_ALIGN, NULL);
987 if (cifs_req_cachep == NULL)
990 if (cifs_min_rcv < 1)
992 else if (cifs_min_rcv > 64) {
994 cERROR(1, "cifs_min_rcv set to maximum (64)");
997 cifs_req_poolp = mempool_create_slab_pool(cifs_min_rcv,
1000 if (cifs_req_poolp == NULL) {
1001 kmem_cache_destroy(cifs_req_cachep);
1004 /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and
1005 almost all handle based requests (but not write response, nor is it
1006 sufficient for path based requests). A smaller size would have
1007 been more efficient (compacting multiple slab items on one 4k page)
1008 for the case in which debug was on, but this larger size allows
1009 more SMBs to use small buffer alloc and is still much more
1010 efficient to alloc 1 per page off the slab compared to 17K (5page)
1011 alloc of large cifs buffers even when page debugging is on */
1012 cifs_sm_req_cachep = kmem_cache_create("cifs_small_rq",
1013 MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN,
1015 if (cifs_sm_req_cachep == NULL) {
1016 mempool_destroy(cifs_req_poolp);
1017 kmem_cache_destroy(cifs_req_cachep);
1021 if (cifs_min_small < 2)
1023 else if (cifs_min_small > 256) {
1024 cifs_min_small = 256;
1025 cFYI(1, "cifs_min_small set to maximum (256)");
1028 cifs_sm_req_poolp = mempool_create_slab_pool(cifs_min_small,
1029 cifs_sm_req_cachep);
1031 if (cifs_sm_req_poolp == NULL) {
1032 mempool_destroy(cifs_req_poolp);
1033 kmem_cache_destroy(cifs_req_cachep);
1034 kmem_cache_destroy(cifs_sm_req_cachep);
1042 cifs_destroy_request_bufs(void)
1044 mempool_destroy(cifs_req_poolp);
1045 kmem_cache_destroy(cifs_req_cachep);
1046 mempool_destroy(cifs_sm_req_poolp);
1047 kmem_cache_destroy(cifs_sm_req_cachep);
1051 cifs_init_mids(void)
1053 cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids",
1054 sizeof(struct mid_q_entry), 0,
1055 SLAB_HWCACHE_ALIGN, NULL);
1056 if (cifs_mid_cachep == NULL)
1059 /* 3 is a reasonable minimum number of simultaneous operations */
1060 cifs_mid_poolp = mempool_create_slab_pool(3, cifs_mid_cachep);
1061 if (cifs_mid_poolp == NULL) {
1062 kmem_cache_destroy(cifs_mid_cachep);
1070 cifs_destroy_mids(void)
1072 mempool_destroy(cifs_mid_poolp);
1073 kmem_cache_destroy(cifs_mid_cachep);
1081 INIT_LIST_HEAD(&cifs_tcp_ses_list);
1082 #ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
1083 INIT_LIST_HEAD(&GlobalDnotifyReqList);
1084 INIT_LIST_HEAD(&GlobalDnotifyRsp_Q);
1085 #endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
1087 * Initialize Global counters
1089 atomic_set(&sesInfoAllocCount, 0);
1090 atomic_set(&tconInfoAllocCount, 0);
1091 atomic_set(&tcpSesAllocCount, 0);
1092 atomic_set(&tcpSesReconnectCount, 0);
1093 atomic_set(&tconInfoReconnectCount, 0);
1095 atomic_set(&bufAllocCount, 0);
1096 atomic_set(&smBufAllocCount, 0);
1097 #ifdef CONFIG_CIFS_STATS2
1098 atomic_set(&totBufAllocCount, 0);
1099 atomic_set(&totSmBufAllocCount, 0);
1100 #endif /* CONFIG_CIFS_STATS2 */
1102 atomic_set(&midCount, 0);
1103 GlobalCurrentXid = 0;
1104 GlobalTotalActiveXid = 0;
1105 GlobalMaxActiveXid = 0;
1106 spin_lock_init(&cifs_tcp_ses_lock);
1107 spin_lock_init(&cifs_file_list_lock);
1108 spin_lock_init(&GlobalMid_Lock);
1110 if (cifs_max_pending < 2) {
1111 cifs_max_pending = 2;
1112 cFYI(1, "cifs_max_pending set to min of 2");
1113 } else if (cifs_max_pending > CIFS_MAX_REQ) {
1114 cifs_max_pending = CIFS_MAX_REQ;
1115 cFYI(1, "cifs_max_pending set to max of %u", CIFS_MAX_REQ);
1118 cifsiod_wq = alloc_workqueue("cifsiod", WQ_FREEZABLE|WQ_MEM_RECLAIM, 0);
1121 goto out_clean_proc;
1124 rc = cifs_fscache_register();
1126 goto out_destroy_wq;
1128 rc = cifs_init_inodecache();
1130 goto out_unreg_fscache;
1132 rc = cifs_init_mids();
1134 goto out_destroy_inodecache;
1136 rc = cifs_init_request_bufs();
1138 goto out_destroy_mids;
1140 #ifdef CONFIG_CIFS_UPCALL
1141 rc = register_key_type(&cifs_spnego_key_type);
1143 goto out_destroy_request_bufs;
1144 #endif /* CONFIG_CIFS_UPCALL */
1146 #ifdef CONFIG_CIFS_ACL
1147 rc = init_cifs_idmap();
1149 goto out_register_key_type;
1150 #endif /* CONFIG_CIFS_ACL */
1152 rc = register_filesystem(&cifs_fs_type);
1154 goto out_init_cifs_idmap;
1158 out_init_cifs_idmap:
1159 #ifdef CONFIG_CIFS_ACL
1161 out_register_key_type:
1163 #ifdef CONFIG_CIFS_UPCALL
1164 unregister_key_type(&cifs_spnego_key_type);
1165 out_destroy_request_bufs:
1167 cifs_destroy_request_bufs();
1169 cifs_destroy_mids();
1170 out_destroy_inodecache:
1171 cifs_destroy_inodecache();
1173 cifs_fscache_unregister();
1175 destroy_workqueue(cifsiod_wq);
1184 cFYI(DBG2, "exit_cifs");
1185 unregister_filesystem(&cifs_fs_type);
1186 cifs_dfs_release_automount_timer();
1187 #ifdef CONFIG_CIFS_ACL
1188 cifs_destroy_idmaptrees();
1191 #ifdef CONFIG_CIFS_UPCALL
1192 unregister_key_type(&cifs_spnego_key_type);
1194 cifs_destroy_request_bufs();
1195 cifs_destroy_mids();
1196 cifs_destroy_inodecache();
1197 cifs_fscache_unregister();
1198 destroy_workqueue(cifsiod_wq);
1202 MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>");
1203 MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */
1205 ("VFS to access servers complying with the SNIA CIFS Specification "
1206 "e.g. Samba and Windows");
1207 MODULE_VERSION(CIFS_VERSION);
1208 module_init(init_cifs)
1209 module_exit(exit_cifs)