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 #define CIFS_MAGIC_NUMBER 0xFF534D42 /* the first four bytes of SMB PDUs */
56 bool enable_oplocks = true;
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, 0444);
78 MODULE_PARM_DESC(cifs_max_pending, "Simultaneous requests to server. "
79 "Default: 32767 Range: 2 to 32767.");
80 module_param(enable_oplocks, bool, 0644);
81 MODULE_PARM_DESC(enable_oplocks, "Enable or disable oplocks (bool). Default:"
84 extern mempool_t *cifs_sm_req_poolp;
85 extern mempool_t *cifs_req_poolp;
86 extern mempool_t *cifs_mid_poolp;
88 struct workqueue_struct *cifsiod_wq;
91 cifs_read_super(struct super_block *sb)
94 struct cifs_sb_info *cifs_sb;
97 cifs_sb = CIFS_SB(sb);
99 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIXACL)
100 sb->s_flags |= MS_POSIXACL;
102 if (cifs_sb_master_tcon(cifs_sb)->ses->capabilities & CAP_LARGE_FILES)
103 sb->s_maxbytes = MAX_LFS_FILESIZE;
105 sb->s_maxbytes = MAX_NON_LFS;
107 /* BB FIXME fix time_gran to be larger for LANMAN sessions */
108 sb->s_time_gran = 100;
110 sb->s_magic = CIFS_MAGIC_NUMBER;
111 sb->s_op = &cifs_super_ops;
112 sb->s_bdi = &cifs_sb->bdi;
113 sb->s_blocksize = CIFS_MAX_MSGSIZE;
114 sb->s_blocksize_bits = 14; /* default 2**14 = CIFS_MAX_MSGSIZE */
115 inode = cifs_root_iget(sb);
122 sb->s_root = d_make_root(inode);
128 /* do that *after* d_alloc_root() - we want NULL ->d_op for root here */
129 if (cifs_sb_master_tcon(cifs_sb)->nocase)
130 sb->s_d_op = &cifs_ci_dentry_ops;
132 sb->s_d_op = &cifs_dentry_ops;
134 #ifdef CONFIG_CIFS_NFSD_EXPORT
135 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
136 cFYI(1, "export ops supported");
137 sb->s_export_op = &cifs_export_ops;
139 #endif /* CONFIG_CIFS_NFSD_EXPORT */
144 cERROR(1, "cifs_read_super: get root inode failed");
148 static void cifs_kill_sb(struct super_block *sb)
150 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
152 cifs_umount(cifs_sb);
156 cifs_statfs(struct dentry *dentry, struct kstatfs *buf)
158 struct super_block *sb = dentry->d_sb;
159 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
160 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
161 int rc = -EOPNOTSUPP;
166 buf->f_type = CIFS_MAGIC_NUMBER;
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 */
180 * We could add a second check for a QFS Unix capability bit
182 if ((tcon->ses->capabilities & CAP_UNIX) &&
183 (CIFS_POSIX_EXTENSIONS & le64_to_cpu(tcon->fsUnixInfo.Capability)))
184 rc = CIFSSMBQFSPosixInfo(xid, tcon, buf);
187 * Only need to call the old QFSInfo if failed on newer one,
190 if (rc && (tcon->ses->capabilities & CAP_NT_SMBS))
191 rc = CIFSSMBQFSInfo(xid, tcon, buf);
194 * Some old Windows servers also do not support level 103, retry with
195 * older level one if old server failed the previous call or we
196 * bypassed it because we detected that this was an older LANMAN sess
199 rc = SMBOldQFSInfo(xid, tcon, buf);
205 static int cifs_permission(struct inode *inode, int mask)
207 struct cifs_sb_info *cifs_sb;
209 cifs_sb = CIFS_SB(inode->i_sb);
211 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) {
212 if ((mask & MAY_EXEC) && !execute_ok(inode))
216 } else /* file mode might have been restricted at mount time
217 on the client (above and beyond ACL on servers) for
218 servers which do not support setting and viewing mode bits,
219 so allowing client to check permissions is useful */
220 return generic_permission(inode, mask);
223 static struct kmem_cache *cifs_inode_cachep;
224 static struct kmem_cache *cifs_req_cachep;
225 static struct kmem_cache *cifs_mid_cachep;
226 static struct kmem_cache *cifs_sm_req_cachep;
227 mempool_t *cifs_sm_req_poolp;
228 mempool_t *cifs_req_poolp;
229 mempool_t *cifs_mid_poolp;
231 static struct inode *
232 cifs_alloc_inode(struct super_block *sb)
234 struct cifsInodeInfo *cifs_inode;
235 cifs_inode = kmem_cache_alloc(cifs_inode_cachep, GFP_KERNEL);
238 cifs_inode->cifsAttrs = 0x20; /* default */
239 cifs_inode->time = 0;
240 /* Until the file is open and we have gotten oplock
241 info back from the server, can not assume caching of
242 file data or metadata */
243 cifs_set_oplock_level(cifs_inode, 0);
244 cifs_inode->delete_pending = false;
245 cifs_inode->invalid_mapping = false;
246 cifs_inode->vfs_inode.i_blkbits = 14; /* 2**14 = CIFS_MAX_MSGSIZE */
247 cifs_inode->server_eof = 0;
248 cifs_inode->uniqueid = 0;
249 cifs_inode->createtime = 0;
251 /* Can not set i_flags here - they get immediately overwritten
252 to zero by the VFS */
253 /* cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME;*/
254 INIT_LIST_HEAD(&cifs_inode->openFileList);
255 return &cifs_inode->vfs_inode;
258 static void cifs_i_callback(struct rcu_head *head)
260 struct inode *inode = container_of(head, struct inode, i_rcu);
261 INIT_LIST_HEAD(&inode->i_dentry);
262 kmem_cache_free(cifs_inode_cachep, CIFS_I(inode));
266 cifs_destroy_inode(struct inode *inode)
268 call_rcu(&inode->i_rcu, cifs_i_callback);
272 cifs_evict_inode(struct inode *inode)
274 truncate_inode_pages(&inode->i_data, 0);
275 end_writeback(inode);
276 cifs_fscache_release_inode_cookie(inode);
280 cifs_show_address(struct seq_file *s, struct TCP_Server_Info *server)
282 struct sockaddr_in *sa = (struct sockaddr_in *) &server->dstaddr;
283 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *) &server->dstaddr;
285 seq_printf(s, ",addr=");
287 switch (server->dstaddr.ss_family) {
289 seq_printf(s, "%pI4", &sa->sin_addr.s_addr);
292 seq_printf(s, "%pI6", &sa6->sin6_addr.s6_addr);
293 if (sa6->sin6_scope_id)
294 seq_printf(s, "%%%u", sa6->sin6_scope_id);
297 seq_printf(s, "(unknown)");
302 cifs_show_security(struct seq_file *s, struct TCP_Server_Info *server)
304 seq_printf(s, ",sec=");
306 switch (server->secType) {
308 seq_printf(s, "lanman");
311 seq_printf(s, "ntlmv2");
314 seq_printf(s, "ntlm");
317 seq_printf(s, "krb5");
320 seq_printf(s, "ntlmssp");
323 /* shouldn't ever happen */
324 seq_printf(s, "unknown");
328 if (server->sec_mode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
333 * cifs_show_options() is for displaying mount options in /proc/mounts.
334 * Not all settable options are displayed but most of the important
338 cifs_show_options(struct seq_file *s, struct dentry *root)
340 struct cifs_sb_info *cifs_sb = CIFS_SB(root->d_sb);
341 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
342 struct sockaddr *srcaddr;
343 srcaddr = (struct sockaddr *)&tcon->ses->server->srcaddr;
345 cifs_show_security(s, tcon->ses->server);
347 seq_printf(s, ",unc=%s", tcon->treeName);
349 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER)
350 seq_printf(s, ",multiuser");
351 else if (tcon->ses->user_name)
352 seq_printf(s, ",username=%s", tcon->ses->user_name);
354 if (tcon->ses->domainName)
355 seq_printf(s, ",domain=%s", tcon->ses->domainName);
357 if (srcaddr->sa_family != AF_UNSPEC) {
358 struct sockaddr_in *saddr4;
359 struct sockaddr_in6 *saddr6;
360 saddr4 = (struct sockaddr_in *)srcaddr;
361 saddr6 = (struct sockaddr_in6 *)srcaddr;
362 if (srcaddr->sa_family == AF_INET6)
363 seq_printf(s, ",srcaddr=%pI6c",
365 else if (srcaddr->sa_family == AF_INET)
366 seq_printf(s, ",srcaddr=%pI4",
367 &saddr4->sin_addr.s_addr);
369 seq_printf(s, ",srcaddr=BAD-AF:%i",
370 (int)(srcaddr->sa_family));
373 seq_printf(s, ",uid=%u", cifs_sb->mnt_uid);
374 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)
375 seq_printf(s, ",forceuid");
377 seq_printf(s, ",noforceuid");
379 seq_printf(s, ",gid=%u", cifs_sb->mnt_gid);
380 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)
381 seq_printf(s, ",forcegid");
383 seq_printf(s, ",noforcegid");
385 cifs_show_address(s, tcon->ses->server);
388 seq_printf(s, ",file_mode=0%ho,dir_mode=0%ho",
389 cifs_sb->mnt_file_mode,
390 cifs_sb->mnt_dir_mode);
392 seq_printf(s, ",seal");
394 seq_printf(s, ",nocase");
396 seq_printf(s, ",hard");
398 seq_printf(s, ",unix");
400 seq_printf(s, ",nounix");
401 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
402 seq_printf(s, ",posixpaths");
403 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)
404 seq_printf(s, ",setuids");
405 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
406 seq_printf(s, ",serverino");
407 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RWPIDFORWARD)
408 seq_printf(s, ",rwpidforward");
409 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL)
410 seq_printf(s, ",forcemand");
411 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO)
412 seq_printf(s, ",directio");
413 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
414 seq_printf(s, ",nouser_xattr");
415 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR)
416 seq_printf(s, ",mapchars");
417 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)
418 seq_printf(s, ",sfu");
419 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
420 seq_printf(s, ",nobrl");
421 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
422 seq_printf(s, ",cifsacl");
423 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)
424 seq_printf(s, ",dynperm");
425 if (root->d_sb->s_flags & MS_POSIXACL)
426 seq_printf(s, ",acl");
427 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS)
428 seq_printf(s, ",mfsymlinks");
429 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_FSCACHE)
430 seq_printf(s, ",fsc");
431 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOSSYNC)
432 seq_printf(s, ",nostrictsync");
433 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM)
434 seq_printf(s, ",noperm");
435 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_STRICT_IO)
436 seq_printf(s, ",strictcache");
437 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_BACKUPUID)
438 seq_printf(s, ",backupuid=%u", cifs_sb->mnt_backupuid);
439 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_BACKUPGID)
440 seq_printf(s, ",backupgid=%u", cifs_sb->mnt_backupgid);
442 seq_printf(s, ",rsize=%u", cifs_sb->rsize);
443 seq_printf(s, ",wsize=%u", cifs_sb->wsize);
444 /* convert actimeo and display it in seconds */
445 seq_printf(s, ",actimeo=%lu", cifs_sb->actimeo / HZ);
450 static void cifs_umount_begin(struct super_block *sb)
452 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
453 struct cifs_tcon *tcon;
458 tcon = cifs_sb_master_tcon(cifs_sb);
460 spin_lock(&cifs_tcp_ses_lock);
461 if ((tcon->tc_count > 1) || (tcon->tidStatus == CifsExiting)) {
462 /* we have other mounts to same share or we have
463 already tried to force umount this and woken up
464 all waiting network requests, nothing to do */
465 spin_unlock(&cifs_tcp_ses_lock);
467 } else if (tcon->tc_count == 1)
468 tcon->tidStatus = CifsExiting;
469 spin_unlock(&cifs_tcp_ses_lock);
471 /* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */
472 /* cancel_notify_requests(tcon); */
473 if (tcon->ses && tcon->ses->server) {
474 cFYI(1, "wake up tasks now - umount begin not complete");
475 wake_up_all(&tcon->ses->server->request_q);
476 wake_up_all(&tcon->ses->server->response_q);
477 msleep(1); /* yield */
478 /* we have to kick the requests once more */
479 wake_up_all(&tcon->ses->server->response_q);
486 #ifdef CONFIG_CIFS_STATS2
487 static int cifs_show_stats(struct seq_file *s, struct dentry *root)
494 static int cifs_remount(struct super_block *sb, int *flags, char *data)
496 *flags |= MS_NODIRATIME;
500 static int cifs_drop_inode(struct inode *inode)
502 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
504 /* no serverino => unconditional eviction */
505 return !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) ||
506 generic_drop_inode(inode);
509 static const struct super_operations cifs_super_ops = {
510 .statfs = cifs_statfs,
511 .alloc_inode = cifs_alloc_inode,
512 .destroy_inode = cifs_destroy_inode,
513 .drop_inode = cifs_drop_inode,
514 .evict_inode = cifs_evict_inode,
515 /* .delete_inode = cifs_delete_inode, */ /* Do not need above
516 function unless later we add lazy close of inodes or unless the
517 kernel forgets to call us with the same number of releases (closes)
519 .show_options = cifs_show_options,
520 .umount_begin = cifs_umount_begin,
521 .remount_fs = cifs_remount,
522 #ifdef CONFIG_CIFS_STATS2
523 .show_stats = cifs_show_stats,
528 * Get root dentry from superblock according to prefix path mount option.
529 * Return dentry with refcount + 1 on success and NULL otherwise.
531 static struct dentry *
532 cifs_get_root(struct smb_vol *vol, struct super_block *sb)
534 struct dentry *dentry;
535 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
536 char *full_path = NULL;
540 full_path = cifs_build_path_to_root(vol, cifs_sb,
541 cifs_sb_master_tcon(cifs_sb));
542 if (full_path == NULL)
543 return ERR_PTR(-ENOMEM);
545 cFYI(1, "Get root dentry for %s", full_path);
547 sep = CIFS_DIR_SEP(cifs_sb);
548 dentry = dget(sb->s_root);
552 struct inode *dir = dentry->d_inode;
553 struct dentry *child;
557 dentry = ERR_PTR(-ENOENT);
561 /* skip separators */
568 while (*s && *s != sep)
571 mutex_lock(&dir->i_mutex);
572 child = lookup_one_len(p, dentry, s - p);
573 mutex_unlock(&dir->i_mutex);
576 } while (!IS_ERR(dentry));
581 static int cifs_set_super(struct super_block *sb, void *data)
583 struct cifs_mnt_data *mnt_data = data;
584 sb->s_fs_info = mnt_data->cifs_sb;
585 return set_anon_super(sb, NULL);
588 static struct dentry *
589 cifs_do_mount(struct file_system_type *fs_type,
590 int flags, const char *dev_name, void *data)
593 struct super_block *sb;
594 struct cifs_sb_info *cifs_sb;
595 struct smb_vol *volume_info;
596 struct cifs_mnt_data mnt_data;
599 cFYI(1, "Devname: %s flags: %d ", dev_name, flags);
601 volume_info = cifs_get_volume_info((char *)data, dev_name);
602 if (IS_ERR(volume_info))
603 return ERR_CAST(volume_info);
605 cifs_sb = kzalloc(sizeof(struct cifs_sb_info), GFP_KERNEL);
606 if (cifs_sb == NULL) {
607 root = ERR_PTR(-ENOMEM);
611 cifs_sb->mountdata = kstrndup(data, PAGE_SIZE, GFP_KERNEL);
612 if (cifs_sb->mountdata == NULL) {
613 root = ERR_PTR(-ENOMEM);
617 cifs_setup_cifs_sb(volume_info, cifs_sb);
619 rc = cifs_mount(cifs_sb, volume_info);
621 if (!(flags & MS_SILENT))
622 cERROR(1, "cifs_mount failed w/return code = %d", rc);
627 mnt_data.vol = volume_info;
628 mnt_data.cifs_sb = cifs_sb;
629 mnt_data.flags = flags;
631 sb = sget(fs_type, cifs_match_super, cifs_set_super, &mnt_data);
634 cifs_umount(cifs_sb);
639 cFYI(1, "Use existing superblock");
640 cifs_umount(cifs_sb);
643 /* BB should we make this contingent on mount parm? */
644 sb->s_flags |= MS_NODIRATIME | MS_NOATIME;
646 rc = cifs_read_super(sb);
652 sb->s_flags |= MS_ACTIVE;
655 root = cifs_get_root(volume_info, sb);
659 cFYI(1, "dentry root is: %p", root);
663 deactivate_locked_super(sb);
665 cifs_cleanup_volume_info(volume_info);
669 kfree(cifs_sb->mountdata);
673 unload_nls(volume_info->local_nls);
677 static ssize_t cifs_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
678 unsigned long nr_segs, loff_t pos)
680 struct inode *inode = iocb->ki_filp->f_path.dentry->d_inode;
684 written = generic_file_aio_write(iocb, iov, nr_segs, pos);
686 if (CIFS_I(inode)->clientCanCacheAll)
689 rc = filemap_fdatawrite(inode->i_mapping);
691 cFYI(1, "cifs_file_aio_write: %d rc on %p inode", rc, inode);
696 static loff_t cifs_llseek(struct file *file, loff_t offset, int origin)
699 * origin == SEEK_END || SEEK_DATA || SEEK_HOLE => we must revalidate
700 * the cached file length
702 if (origin != SEEK_SET && origin != SEEK_CUR) {
704 struct inode *inode = file->f_path.dentry->d_inode;
707 * We need to be sure that all dirty pages are written and the
708 * server has the newest file length.
710 if (!CIFS_I(inode)->clientCanCacheRead && inode->i_mapping &&
711 inode->i_mapping->nrpages != 0) {
712 rc = filemap_fdatawait(inode->i_mapping);
714 mapping_set_error(inode->i_mapping, rc);
719 * Some applications poll for the file length in this strange
720 * way so we must seek to end on non-oplocked files by
721 * setting the revalidate time to zero.
723 CIFS_I(inode)->time = 0;
725 rc = cifs_revalidate_file_attr(file);
729 return generic_file_llseek(file, offset, origin);
732 static int cifs_setlease(struct file *file, long arg, struct file_lock **lease)
734 /* note that this is called by vfs setlease with lock_flocks held
735 to protect *lease from going away */
736 struct inode *inode = file->f_path.dentry->d_inode;
737 struct cifsFileInfo *cfile = file->private_data;
739 if (!(S_ISREG(inode->i_mode)))
742 /* check if file is oplocked */
743 if (((arg == F_RDLCK) &&
744 (CIFS_I(inode)->clientCanCacheRead)) ||
746 (CIFS_I(inode)->clientCanCacheAll)))
747 return generic_setlease(file, arg, lease);
748 else if (tlink_tcon(cfile->tlink)->local_lease &&
749 !CIFS_I(inode)->clientCanCacheRead)
750 /* If the server claims to support oplock on this
751 file, then we still need to check oplock even
752 if the local_lease mount option is set, but there
753 are servers which do not support oplock for which
754 this mount option may be useful if the user
755 knows that the file won't be changed on the server
757 return generic_setlease(file, arg, lease);
762 struct file_system_type cifs_fs_type = {
763 .owner = THIS_MODULE,
765 .mount = cifs_do_mount,
766 .kill_sb = cifs_kill_sb,
769 const struct inode_operations cifs_dir_inode_ops = {
770 .create = cifs_create,
771 .lookup = cifs_lookup,
772 .getattr = cifs_getattr,
773 .unlink = cifs_unlink,
774 .link = cifs_hardlink,
777 .rename = cifs_rename,
778 .permission = cifs_permission,
779 /* revalidate:cifs_revalidate, */
780 .setattr = cifs_setattr,
781 .symlink = cifs_symlink,
783 #ifdef CONFIG_CIFS_XATTR
784 .setxattr = cifs_setxattr,
785 .getxattr = cifs_getxattr,
786 .listxattr = cifs_listxattr,
787 .removexattr = cifs_removexattr,
791 const struct inode_operations cifs_file_inode_ops = {
792 /* revalidate:cifs_revalidate, */
793 .setattr = cifs_setattr,
794 .getattr = cifs_getattr, /* do we need this anymore? */
795 .rename = cifs_rename,
796 .permission = cifs_permission,
797 #ifdef CONFIG_CIFS_XATTR
798 .setxattr = cifs_setxattr,
799 .getxattr = cifs_getxattr,
800 .listxattr = cifs_listxattr,
801 .removexattr = cifs_removexattr,
805 const struct inode_operations cifs_symlink_inode_ops = {
806 .readlink = generic_readlink,
807 .follow_link = cifs_follow_link,
808 .put_link = cifs_put_link,
809 .permission = cifs_permission,
810 /* BB add the following two eventually */
811 /* revalidate: cifs_revalidate,
812 setattr: cifs_notify_change, *//* BB do we need notify change */
813 #ifdef CONFIG_CIFS_XATTR
814 .setxattr = cifs_setxattr,
815 .getxattr = cifs_getxattr,
816 .listxattr = cifs_listxattr,
817 .removexattr = cifs_removexattr,
821 const struct file_operations cifs_file_ops = {
822 .read = do_sync_read,
823 .write = do_sync_write,
824 .aio_read = generic_file_aio_read,
825 .aio_write = cifs_file_aio_write,
827 .release = cifs_close,
831 .mmap = cifs_file_mmap,
832 .splice_read = generic_file_splice_read,
833 .llseek = cifs_llseek,
834 #ifdef CONFIG_CIFS_POSIX
835 .unlocked_ioctl = cifs_ioctl,
836 #endif /* CONFIG_CIFS_POSIX */
837 .setlease = cifs_setlease,
840 const struct file_operations cifs_file_strict_ops = {
841 .read = do_sync_read,
842 .write = do_sync_write,
843 .aio_read = cifs_strict_readv,
844 .aio_write = cifs_strict_writev,
846 .release = cifs_close,
848 .fsync = cifs_strict_fsync,
850 .mmap = cifs_file_strict_mmap,
851 .splice_read = generic_file_splice_read,
852 .llseek = cifs_llseek,
853 #ifdef CONFIG_CIFS_POSIX
854 .unlocked_ioctl = cifs_ioctl,
855 #endif /* CONFIG_CIFS_POSIX */
856 .setlease = cifs_setlease,
859 const struct file_operations cifs_file_direct_ops = {
860 /* BB reevaluate whether they can be done with directio, no cache */
861 .read = do_sync_read,
862 .write = do_sync_write,
863 .aio_read = cifs_user_readv,
864 .aio_write = cifs_user_writev,
866 .release = cifs_close,
870 .mmap = cifs_file_mmap,
871 .splice_read = generic_file_splice_read,
872 #ifdef CONFIG_CIFS_POSIX
873 .unlocked_ioctl = cifs_ioctl,
874 #endif /* CONFIG_CIFS_POSIX */
875 .llseek = cifs_llseek,
876 .setlease = cifs_setlease,
879 const struct file_operations cifs_file_nobrl_ops = {
880 .read = do_sync_read,
881 .write = do_sync_write,
882 .aio_read = generic_file_aio_read,
883 .aio_write = cifs_file_aio_write,
885 .release = cifs_close,
888 .mmap = cifs_file_mmap,
889 .splice_read = generic_file_splice_read,
890 .llseek = cifs_llseek,
891 #ifdef CONFIG_CIFS_POSIX
892 .unlocked_ioctl = cifs_ioctl,
893 #endif /* CONFIG_CIFS_POSIX */
894 .setlease = cifs_setlease,
897 const struct file_operations cifs_file_strict_nobrl_ops = {
898 .read = do_sync_read,
899 .write = do_sync_write,
900 .aio_read = cifs_strict_readv,
901 .aio_write = cifs_strict_writev,
903 .release = cifs_close,
904 .fsync = cifs_strict_fsync,
906 .mmap = cifs_file_strict_mmap,
907 .splice_read = generic_file_splice_read,
908 .llseek = cifs_llseek,
909 #ifdef CONFIG_CIFS_POSIX
910 .unlocked_ioctl = cifs_ioctl,
911 #endif /* CONFIG_CIFS_POSIX */
912 .setlease = cifs_setlease,
915 const struct file_operations cifs_file_direct_nobrl_ops = {
916 /* BB reevaluate whether they can be done with directio, no cache */
917 .read = do_sync_read,
918 .write = do_sync_write,
919 .aio_read = cifs_user_readv,
920 .aio_write = cifs_user_writev,
922 .release = cifs_close,
925 .mmap = cifs_file_mmap,
926 .splice_read = generic_file_splice_read,
927 #ifdef CONFIG_CIFS_POSIX
928 .unlocked_ioctl = cifs_ioctl,
929 #endif /* CONFIG_CIFS_POSIX */
930 .llseek = cifs_llseek,
931 .setlease = cifs_setlease,
934 const struct file_operations cifs_dir_ops = {
935 .readdir = cifs_readdir,
936 .release = cifs_closedir,
937 .read = generic_read_dir,
938 .unlocked_ioctl = cifs_ioctl,
939 .llseek = generic_file_llseek,
943 cifs_init_once(void *inode)
945 struct cifsInodeInfo *cifsi = inode;
947 inode_init_once(&cifsi->vfs_inode);
948 INIT_LIST_HEAD(&cifsi->llist);
949 mutex_init(&cifsi->lock_mutex);
953 cifs_init_inodecache(void)
955 cifs_inode_cachep = kmem_cache_create("cifs_inode_cache",
956 sizeof(struct cifsInodeInfo),
957 0, (SLAB_RECLAIM_ACCOUNT|
960 if (cifs_inode_cachep == NULL)
967 cifs_destroy_inodecache(void)
969 kmem_cache_destroy(cifs_inode_cachep);
973 cifs_init_request_bufs(void)
975 if (CIFSMaxBufSize < 8192) {
976 /* Buffer size can not be smaller than 2 * PATH_MAX since maximum
977 Unicode path name has to fit in any SMB/CIFS path based frames */
978 CIFSMaxBufSize = 8192;
979 } else if (CIFSMaxBufSize > 1024*127) {
980 CIFSMaxBufSize = 1024 * 127;
982 CIFSMaxBufSize &= 0x1FE00; /* Round size to even 512 byte mult*/
984 /* cERROR(1, "CIFSMaxBufSize %d 0x%x",CIFSMaxBufSize,CIFSMaxBufSize); */
985 cifs_req_cachep = kmem_cache_create("cifs_request",
987 MAX_CIFS_HDR_SIZE, 0,
988 SLAB_HWCACHE_ALIGN, NULL);
989 if (cifs_req_cachep == NULL)
992 if (cifs_min_rcv < 1)
994 else if (cifs_min_rcv > 64) {
996 cERROR(1, "cifs_min_rcv set to maximum (64)");
999 cifs_req_poolp = mempool_create_slab_pool(cifs_min_rcv,
1002 if (cifs_req_poolp == NULL) {
1003 kmem_cache_destroy(cifs_req_cachep);
1006 /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and
1007 almost all handle based requests (but not write response, nor is it
1008 sufficient for path based requests). A smaller size would have
1009 been more efficient (compacting multiple slab items on one 4k page)
1010 for the case in which debug was on, but this larger size allows
1011 more SMBs to use small buffer alloc and is still much more
1012 efficient to alloc 1 per page off the slab compared to 17K (5page)
1013 alloc of large cifs buffers even when page debugging is on */
1014 cifs_sm_req_cachep = kmem_cache_create("cifs_small_rq",
1015 MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN,
1017 if (cifs_sm_req_cachep == NULL) {
1018 mempool_destroy(cifs_req_poolp);
1019 kmem_cache_destroy(cifs_req_cachep);
1023 if (cifs_min_small < 2)
1025 else if (cifs_min_small > 256) {
1026 cifs_min_small = 256;
1027 cFYI(1, "cifs_min_small set to maximum (256)");
1030 cifs_sm_req_poolp = mempool_create_slab_pool(cifs_min_small,
1031 cifs_sm_req_cachep);
1033 if (cifs_sm_req_poolp == NULL) {
1034 mempool_destroy(cifs_req_poolp);
1035 kmem_cache_destroy(cifs_req_cachep);
1036 kmem_cache_destroy(cifs_sm_req_cachep);
1044 cifs_destroy_request_bufs(void)
1046 mempool_destroy(cifs_req_poolp);
1047 kmem_cache_destroy(cifs_req_cachep);
1048 mempool_destroy(cifs_sm_req_poolp);
1049 kmem_cache_destroy(cifs_sm_req_cachep);
1053 cifs_init_mids(void)
1055 cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids",
1056 sizeof(struct mid_q_entry), 0,
1057 SLAB_HWCACHE_ALIGN, NULL);
1058 if (cifs_mid_cachep == NULL)
1061 /* 3 is a reasonable minimum number of simultaneous operations */
1062 cifs_mid_poolp = mempool_create_slab_pool(3, cifs_mid_cachep);
1063 if (cifs_mid_poolp == NULL) {
1064 kmem_cache_destroy(cifs_mid_cachep);
1072 cifs_destroy_mids(void)
1074 mempool_destroy(cifs_mid_poolp);
1075 kmem_cache_destroy(cifs_mid_cachep);
1083 INIT_LIST_HEAD(&cifs_tcp_ses_list);
1084 #ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
1085 INIT_LIST_HEAD(&GlobalDnotifyReqList);
1086 INIT_LIST_HEAD(&GlobalDnotifyRsp_Q);
1087 #endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
1089 * Initialize Global counters
1091 atomic_set(&sesInfoAllocCount, 0);
1092 atomic_set(&tconInfoAllocCount, 0);
1093 atomic_set(&tcpSesAllocCount, 0);
1094 atomic_set(&tcpSesReconnectCount, 0);
1095 atomic_set(&tconInfoReconnectCount, 0);
1097 atomic_set(&bufAllocCount, 0);
1098 atomic_set(&smBufAllocCount, 0);
1099 #ifdef CONFIG_CIFS_STATS2
1100 atomic_set(&totBufAllocCount, 0);
1101 atomic_set(&totSmBufAllocCount, 0);
1102 #endif /* CONFIG_CIFS_STATS2 */
1104 atomic_set(&midCount, 0);
1105 GlobalCurrentXid = 0;
1106 GlobalTotalActiveXid = 0;
1107 GlobalMaxActiveXid = 0;
1108 spin_lock_init(&cifs_tcp_ses_lock);
1109 spin_lock_init(&cifs_file_list_lock);
1110 spin_lock_init(&GlobalMid_Lock);
1112 if (cifs_max_pending < 2) {
1113 cifs_max_pending = 2;
1114 cFYI(1, "cifs_max_pending set to min of 2");
1115 } else if (cifs_max_pending > CIFS_MAX_REQ) {
1116 cifs_max_pending = CIFS_MAX_REQ;
1117 cFYI(1, "cifs_max_pending set to max of %u", CIFS_MAX_REQ);
1120 cifsiod_wq = alloc_workqueue("cifsiod", WQ_FREEZABLE|WQ_MEM_RECLAIM, 0);
1123 goto out_clean_proc;
1126 rc = cifs_fscache_register();
1128 goto out_destroy_wq;
1130 rc = cifs_init_inodecache();
1132 goto out_unreg_fscache;
1134 rc = cifs_init_mids();
1136 goto out_destroy_inodecache;
1138 rc = cifs_init_request_bufs();
1140 goto out_destroy_mids;
1142 #ifdef CONFIG_CIFS_UPCALL
1143 rc = register_key_type(&cifs_spnego_key_type);
1145 goto out_destroy_request_bufs;
1146 #endif /* CONFIG_CIFS_UPCALL */
1148 #ifdef CONFIG_CIFS_ACL
1149 rc = init_cifs_idmap();
1151 goto out_register_key_type;
1152 #endif /* CONFIG_CIFS_ACL */
1154 rc = register_filesystem(&cifs_fs_type);
1156 goto out_init_cifs_idmap;
1160 out_init_cifs_idmap:
1161 #ifdef CONFIG_CIFS_ACL
1163 out_register_key_type:
1165 #ifdef CONFIG_CIFS_UPCALL
1166 unregister_key_type(&cifs_spnego_key_type);
1167 out_destroy_request_bufs:
1169 cifs_destroy_request_bufs();
1171 cifs_destroy_mids();
1172 out_destroy_inodecache:
1173 cifs_destroy_inodecache();
1175 cifs_fscache_unregister();
1177 destroy_workqueue(cifsiod_wq);
1186 cFYI(DBG2, "exit_cifs");
1187 unregister_filesystem(&cifs_fs_type);
1188 cifs_dfs_release_automount_timer();
1189 #ifdef CONFIG_CIFS_ACL
1190 cifs_destroy_idmaptrees();
1193 #ifdef CONFIG_CIFS_UPCALL
1194 unregister_key_type(&cifs_spnego_key_type);
1196 cifs_destroy_request_bufs();
1197 cifs_destroy_mids();
1198 cifs_destroy_inodecache();
1199 cifs_fscache_unregister();
1200 destroy_workqueue(cifsiod_wq);
1204 MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>");
1205 MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */
1207 ("VFS to access servers complying with the SNIA CIFS Specification "
1208 "e.g. Samba and Windows");
1209 MODULE_VERSION(CIFS_VERSION);
1210 module_init(init_cifs)
1211 module_exit(exit_cifs)