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 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, 0444);
77 MODULE_PARM_DESC(cifs_max_pending, "Simultaneous requests to server. "
78 "Default: 32767 Range: 2 to 32767.");
79 module_param(enable_oplocks, bool, 0644);
80 MODULE_PARM_DESC(enable_oplocks, "Enable or disable oplocks (bool). Default:"
83 extern mempool_t *cifs_sm_req_poolp;
84 extern mempool_t *cifs_req_poolp;
85 extern mempool_t *cifs_mid_poolp;
87 struct workqueue_struct *cifsiod_wq;
90 cifs_read_super(struct super_block *sb)
93 struct cifs_sb_info *cifs_sb;
96 cifs_sb = CIFS_SB(sb);
98 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIXACL)
99 sb->s_flags |= MS_POSIXACL;
101 if (cifs_sb_master_tcon(cifs_sb)->ses->capabilities & CAP_LARGE_FILES)
102 sb->s_maxbytes = MAX_LFS_FILESIZE;
104 sb->s_maxbytes = MAX_NON_LFS;
106 /* BB FIXME fix time_gran to be larger for LANMAN sessions */
107 sb->s_time_gran = 100;
109 sb->s_magic = CIFS_MAGIC_NUMBER;
110 sb->s_op = &cifs_super_ops;
111 sb->s_bdi = &cifs_sb->bdi;
112 sb->s_blocksize = CIFS_MAX_MSGSIZE;
113 sb->s_blocksize_bits = 14; /* default 2**14 = CIFS_MAX_MSGSIZE */
114 inode = cifs_root_iget(sb);
121 sb->s_root = d_make_root(inode);
127 /* do that *after* d_make_root() - we want NULL ->d_op for root here */
128 if (cifs_sb_master_tcon(cifs_sb)->nocase)
129 sb->s_d_op = &cifs_ci_dentry_ops;
131 sb->s_d_op = &cifs_dentry_ops;
133 #ifdef CONFIG_CIFS_NFSD_EXPORT
134 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
135 cFYI(1, "export ops supported");
136 sb->s_export_op = &cifs_export_ops;
138 #endif /* CONFIG_CIFS_NFSD_EXPORT */
143 cERROR(1, "cifs_read_super: get root inode failed");
147 static void cifs_kill_sb(struct super_block *sb)
149 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
151 cifs_umount(cifs_sb);
155 cifs_statfs(struct dentry *dentry, struct kstatfs *buf)
157 struct super_block *sb = dentry->d_sb;
158 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
159 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
160 int rc = -EOPNOTSUPP;
165 buf->f_type = CIFS_MAGIC_NUMBER;
168 * PATH_MAX may be too long - it would presumably be total path,
169 * but note that some servers (includinng Samba 3) have a shorter
172 * Instead could get the real value via SMB_QUERY_FS_ATTRIBUTE_INFO.
174 buf->f_namelen = PATH_MAX;
175 buf->f_files = 0; /* undefined */
176 buf->f_ffree = 0; /* unlimited */
179 * We could add a second check for a QFS Unix capability bit
181 if ((tcon->ses->capabilities & CAP_UNIX) &&
182 (CIFS_POSIX_EXTENSIONS & le64_to_cpu(tcon->fsUnixInfo.Capability)))
183 rc = CIFSSMBQFSPosixInfo(xid, tcon, buf);
186 * Only need to call the old QFSInfo if failed on newer one,
189 if (rc && (tcon->ses->capabilities & CAP_NT_SMBS))
190 rc = CIFSSMBQFSInfo(xid, tcon, buf);
193 * Some old Windows servers also do not support level 103, retry with
194 * older level one if old server failed the previous call or we
195 * bypassed it because we detected that this was an older LANMAN sess
198 rc = SMBOldQFSInfo(xid, tcon, buf);
204 static int cifs_permission(struct inode *inode, int mask)
206 struct cifs_sb_info *cifs_sb;
208 cifs_sb = CIFS_SB(inode->i_sb);
210 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) {
211 if ((mask & MAY_EXEC) && !execute_ok(inode))
215 } else /* file mode might have been restricted at mount time
216 on the client (above and beyond ACL on servers) for
217 servers which do not support setting and viewing mode bits,
218 so allowing client to check permissions is useful */
219 return generic_permission(inode, mask);
222 static struct kmem_cache *cifs_inode_cachep;
223 static struct kmem_cache *cifs_req_cachep;
224 static struct kmem_cache *cifs_mid_cachep;
225 static struct kmem_cache *cifs_sm_req_cachep;
226 mempool_t *cifs_sm_req_poolp;
227 mempool_t *cifs_req_poolp;
228 mempool_t *cifs_mid_poolp;
230 static struct inode *
231 cifs_alloc_inode(struct super_block *sb)
233 struct cifsInodeInfo *cifs_inode;
234 cifs_inode = kmem_cache_alloc(cifs_inode_cachep, GFP_KERNEL);
237 cifs_inode->cifsAttrs = 0x20; /* default */
238 cifs_inode->time = 0;
239 /* Until the file is open and we have gotten oplock
240 info back from the server, can not assume caching of
241 file data or metadata */
242 cifs_set_oplock_level(cifs_inode, 0);
243 cifs_inode->delete_pending = false;
244 cifs_inode->invalid_mapping = false;
245 cifs_inode->vfs_inode.i_blkbits = 14; /* 2**14 = CIFS_MAX_MSGSIZE */
246 cifs_inode->server_eof = 0;
247 cifs_inode->uniqueid = 0;
248 cifs_inode->createtime = 0;
250 /* Can not set i_flags here - they get immediately overwritten
251 to zero by the VFS */
252 /* cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME;*/
253 INIT_LIST_HEAD(&cifs_inode->openFileList);
254 return &cifs_inode->vfs_inode;
257 static void cifs_i_callback(struct rcu_head *head)
259 struct inode *inode = container_of(head, struct inode, i_rcu);
260 INIT_LIST_HEAD(&inode->i_dentry);
261 kmem_cache_free(cifs_inode_cachep, CIFS_I(inode));
265 cifs_destroy_inode(struct inode *inode)
267 call_rcu(&inode->i_rcu, cifs_i_callback);
271 cifs_evict_inode(struct inode *inode)
273 truncate_inode_pages(&inode->i_data, 0);
275 cifs_fscache_release_inode_cookie(inode);
279 cifs_show_address(struct seq_file *s, struct TCP_Server_Info *server)
281 struct sockaddr_in *sa = (struct sockaddr_in *) &server->dstaddr;
282 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *) &server->dstaddr;
284 seq_printf(s, ",addr=");
286 switch (server->dstaddr.ss_family) {
288 seq_printf(s, "%pI4", &sa->sin_addr.s_addr);
291 seq_printf(s, "%pI6", &sa6->sin6_addr.s6_addr);
292 if (sa6->sin6_scope_id)
293 seq_printf(s, "%%%u", sa6->sin6_scope_id);
296 seq_printf(s, "(unknown)");
301 cifs_show_security(struct seq_file *s, struct TCP_Server_Info *server)
303 seq_printf(s, ",sec=");
305 switch (server->secType) {
307 seq_printf(s, "lanman");
310 seq_printf(s, "ntlmv2");
313 seq_printf(s, "ntlm");
316 seq_printf(s, "krb5");
319 seq_printf(s, "ntlmssp");
322 /* shouldn't ever happen */
323 seq_printf(s, "unknown");
327 if (server->sec_mode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
332 cifs_show_cache_flavor(struct seq_file *s, struct cifs_sb_info *cifs_sb)
334 seq_printf(s, ",cache=");
336 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_STRICT_IO)
337 seq_printf(s, "strict");
338 else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO)
339 seq_printf(s, "none");
341 seq_printf(s, "loose");
345 * cifs_show_options() is for displaying mount options in /proc/mounts.
346 * Not all settable options are displayed but most of the important
350 cifs_show_options(struct seq_file *s, struct dentry *root)
352 struct cifs_sb_info *cifs_sb = CIFS_SB(root->d_sb);
353 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
354 struct sockaddr *srcaddr;
355 srcaddr = (struct sockaddr *)&tcon->ses->server->srcaddr;
357 seq_printf(s, ",vers=%s", tcon->ses->server->vals->version_string);
358 cifs_show_security(s, tcon->ses->server);
359 cifs_show_cache_flavor(s, cifs_sb);
361 seq_printf(s, ",unc=%s", tcon->treeName);
363 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER)
364 seq_printf(s, ",multiuser");
365 else if (tcon->ses->user_name)
366 seq_printf(s, ",username=%s", tcon->ses->user_name);
368 if (tcon->ses->domainName)
369 seq_printf(s, ",domain=%s", tcon->ses->domainName);
371 if (srcaddr->sa_family != AF_UNSPEC) {
372 struct sockaddr_in *saddr4;
373 struct sockaddr_in6 *saddr6;
374 saddr4 = (struct sockaddr_in *)srcaddr;
375 saddr6 = (struct sockaddr_in6 *)srcaddr;
376 if (srcaddr->sa_family == AF_INET6)
377 seq_printf(s, ",srcaddr=%pI6c",
379 else if (srcaddr->sa_family == AF_INET)
380 seq_printf(s, ",srcaddr=%pI4",
381 &saddr4->sin_addr.s_addr);
383 seq_printf(s, ",srcaddr=BAD-AF:%i",
384 (int)(srcaddr->sa_family));
387 seq_printf(s, ",uid=%u", cifs_sb->mnt_uid);
388 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)
389 seq_printf(s, ",forceuid");
391 seq_printf(s, ",noforceuid");
393 seq_printf(s, ",gid=%u", cifs_sb->mnt_gid);
394 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)
395 seq_printf(s, ",forcegid");
397 seq_printf(s, ",noforcegid");
399 cifs_show_address(s, tcon->ses->server);
402 seq_printf(s, ",file_mode=0%ho,dir_mode=0%ho",
403 cifs_sb->mnt_file_mode,
404 cifs_sb->mnt_dir_mode);
406 seq_printf(s, ",seal");
408 seq_printf(s, ",nocase");
410 seq_printf(s, ",hard");
412 seq_printf(s, ",unix");
414 seq_printf(s, ",nounix");
415 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
416 seq_printf(s, ",posixpaths");
417 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)
418 seq_printf(s, ",setuids");
419 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
420 seq_printf(s, ",serverino");
421 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RWPIDFORWARD)
422 seq_printf(s, ",rwpidforward");
423 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL)
424 seq_printf(s, ",forcemand");
425 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
426 seq_printf(s, ",nouser_xattr");
427 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR)
428 seq_printf(s, ",mapchars");
429 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)
430 seq_printf(s, ",sfu");
431 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
432 seq_printf(s, ",nobrl");
433 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
434 seq_printf(s, ",cifsacl");
435 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)
436 seq_printf(s, ",dynperm");
437 if (root->d_sb->s_flags & MS_POSIXACL)
438 seq_printf(s, ",acl");
439 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS)
440 seq_printf(s, ",mfsymlinks");
441 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_FSCACHE)
442 seq_printf(s, ",fsc");
443 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOSSYNC)
444 seq_printf(s, ",nostrictsync");
445 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM)
446 seq_printf(s, ",noperm");
447 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_BACKUPUID)
448 seq_printf(s, ",backupuid=%u", cifs_sb->mnt_backupuid);
449 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_BACKUPGID)
450 seq_printf(s, ",backupgid=%u", cifs_sb->mnt_backupgid);
452 seq_printf(s, ",rsize=%u", cifs_sb->rsize);
453 seq_printf(s, ",wsize=%u", cifs_sb->wsize);
454 /* convert actimeo and display it in seconds */
455 seq_printf(s, ",actimeo=%lu", cifs_sb->actimeo / HZ);
460 static void cifs_umount_begin(struct super_block *sb)
462 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
463 struct cifs_tcon *tcon;
468 tcon = cifs_sb_master_tcon(cifs_sb);
470 spin_lock(&cifs_tcp_ses_lock);
471 if ((tcon->tc_count > 1) || (tcon->tidStatus == CifsExiting)) {
472 /* we have other mounts to same share or we have
473 already tried to force umount this and woken up
474 all waiting network requests, nothing to do */
475 spin_unlock(&cifs_tcp_ses_lock);
477 } else if (tcon->tc_count == 1)
478 tcon->tidStatus = CifsExiting;
479 spin_unlock(&cifs_tcp_ses_lock);
481 /* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */
482 /* cancel_notify_requests(tcon); */
483 if (tcon->ses && tcon->ses->server) {
484 cFYI(1, "wake up tasks now - umount begin not complete");
485 wake_up_all(&tcon->ses->server->request_q);
486 wake_up_all(&tcon->ses->server->response_q);
487 msleep(1); /* yield */
488 /* we have to kick the requests once more */
489 wake_up_all(&tcon->ses->server->response_q);
496 #ifdef CONFIG_CIFS_STATS2
497 static int cifs_show_stats(struct seq_file *s, struct dentry *root)
504 static int cifs_remount(struct super_block *sb, int *flags, char *data)
506 *flags |= MS_NODIRATIME;
510 static int cifs_drop_inode(struct inode *inode)
512 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
514 /* no serverino => unconditional eviction */
515 return !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) ||
516 generic_drop_inode(inode);
519 static const struct super_operations cifs_super_ops = {
520 .statfs = cifs_statfs,
521 .alloc_inode = cifs_alloc_inode,
522 .destroy_inode = cifs_destroy_inode,
523 .drop_inode = cifs_drop_inode,
524 .evict_inode = cifs_evict_inode,
525 /* .delete_inode = cifs_delete_inode, */ /* Do not need above
526 function unless later we add lazy close of inodes or unless the
527 kernel forgets to call us with the same number of releases (closes)
529 .show_options = cifs_show_options,
530 .umount_begin = cifs_umount_begin,
531 .remount_fs = cifs_remount,
532 #ifdef CONFIG_CIFS_STATS2
533 .show_stats = cifs_show_stats,
538 * Get root dentry from superblock according to prefix path mount option.
539 * Return dentry with refcount + 1 on success and NULL otherwise.
541 static struct dentry *
542 cifs_get_root(struct smb_vol *vol, struct super_block *sb)
544 struct dentry *dentry;
545 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
546 char *full_path = NULL;
550 full_path = cifs_build_path_to_root(vol, cifs_sb,
551 cifs_sb_master_tcon(cifs_sb));
552 if (full_path == NULL)
553 return ERR_PTR(-ENOMEM);
555 cFYI(1, "Get root dentry for %s", full_path);
557 sep = CIFS_DIR_SEP(cifs_sb);
558 dentry = dget(sb->s_root);
562 struct inode *dir = dentry->d_inode;
563 struct dentry *child;
567 dentry = ERR_PTR(-ENOENT);
571 /* skip separators */
578 while (*s && *s != sep)
581 mutex_lock(&dir->i_mutex);
582 child = lookup_one_len(p, dentry, s - p);
583 mutex_unlock(&dir->i_mutex);
586 } while (!IS_ERR(dentry));
591 static int cifs_set_super(struct super_block *sb, void *data)
593 struct cifs_mnt_data *mnt_data = data;
594 sb->s_fs_info = mnt_data->cifs_sb;
595 return set_anon_super(sb, NULL);
598 static struct dentry *
599 cifs_do_mount(struct file_system_type *fs_type,
600 int flags, const char *dev_name, void *data)
603 struct super_block *sb;
604 struct cifs_sb_info *cifs_sb;
605 struct smb_vol *volume_info;
606 struct cifs_mnt_data mnt_data;
609 cFYI(1, "Devname: %s flags: %d ", dev_name, flags);
611 volume_info = cifs_get_volume_info((char *)data, dev_name);
612 if (IS_ERR(volume_info))
613 return ERR_CAST(volume_info);
615 cifs_sb = kzalloc(sizeof(struct cifs_sb_info), GFP_KERNEL);
616 if (cifs_sb == NULL) {
617 root = ERR_PTR(-ENOMEM);
621 cifs_sb->mountdata = kstrndup(data, PAGE_SIZE, GFP_KERNEL);
622 if (cifs_sb->mountdata == NULL) {
623 root = ERR_PTR(-ENOMEM);
627 cifs_setup_cifs_sb(volume_info, cifs_sb);
629 rc = cifs_mount(cifs_sb, volume_info);
631 if (!(flags & MS_SILENT))
632 cERROR(1, "cifs_mount failed w/return code = %d", rc);
637 mnt_data.vol = volume_info;
638 mnt_data.cifs_sb = cifs_sb;
639 mnt_data.flags = flags;
641 sb = sget(fs_type, cifs_match_super, cifs_set_super, &mnt_data);
644 cifs_umount(cifs_sb);
649 cFYI(1, "Use existing superblock");
650 cifs_umount(cifs_sb);
653 /* BB should we make this contingent on mount parm? */
654 sb->s_flags |= MS_NODIRATIME | MS_NOATIME;
656 rc = cifs_read_super(sb);
662 sb->s_flags |= MS_ACTIVE;
665 root = cifs_get_root(volume_info, sb);
669 cFYI(1, "dentry root is: %p", root);
673 deactivate_locked_super(sb);
675 cifs_cleanup_volume_info(volume_info);
679 kfree(cifs_sb->mountdata);
683 unload_nls(volume_info->local_nls);
687 static ssize_t cifs_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
688 unsigned long nr_segs, loff_t pos)
690 struct inode *inode = iocb->ki_filp->f_path.dentry->d_inode;
694 written = generic_file_aio_write(iocb, iov, nr_segs, pos);
696 if (CIFS_I(inode)->clientCanCacheAll)
699 rc = filemap_fdatawrite(inode->i_mapping);
701 cFYI(1, "cifs_file_aio_write: %d rc on %p inode", rc, inode);
706 static loff_t cifs_llseek(struct file *file, loff_t offset, int origin)
709 * origin == SEEK_END || SEEK_DATA || SEEK_HOLE => we must revalidate
710 * the cached file length
712 if (origin != SEEK_SET && origin != SEEK_CUR) {
714 struct inode *inode = file->f_path.dentry->d_inode;
717 * We need to be sure that all dirty pages are written and the
718 * server has the newest file length.
720 if (!CIFS_I(inode)->clientCanCacheRead && inode->i_mapping &&
721 inode->i_mapping->nrpages != 0) {
722 rc = filemap_fdatawait(inode->i_mapping);
724 mapping_set_error(inode->i_mapping, rc);
729 * Some applications poll for the file length in this strange
730 * way so we must seek to end on non-oplocked files by
731 * setting the revalidate time to zero.
733 CIFS_I(inode)->time = 0;
735 rc = cifs_revalidate_file_attr(file);
739 return generic_file_llseek(file, offset, origin);
742 static int cifs_setlease(struct file *file, long arg, struct file_lock **lease)
744 /* note that this is called by vfs setlease with lock_flocks held
745 to protect *lease from going away */
746 struct inode *inode = file->f_path.dentry->d_inode;
747 struct cifsFileInfo *cfile = file->private_data;
749 if (!(S_ISREG(inode->i_mode)))
752 /* check if file is oplocked */
753 if (((arg == F_RDLCK) &&
754 (CIFS_I(inode)->clientCanCacheRead)) ||
756 (CIFS_I(inode)->clientCanCacheAll)))
757 return generic_setlease(file, arg, lease);
758 else if (tlink_tcon(cfile->tlink)->local_lease &&
759 !CIFS_I(inode)->clientCanCacheRead)
760 /* If the server claims to support oplock on this
761 file, then we still need to check oplock even
762 if the local_lease mount option is set, but there
763 are servers which do not support oplock for which
764 this mount option may be useful if the user
765 knows that the file won't be changed on the server
767 return generic_setlease(file, arg, lease);
772 struct file_system_type cifs_fs_type = {
773 .owner = THIS_MODULE,
775 .mount = cifs_do_mount,
776 .kill_sb = cifs_kill_sb,
779 const struct inode_operations cifs_dir_inode_ops = {
780 .create = cifs_create,
781 .lookup = cifs_lookup,
782 .getattr = cifs_getattr,
783 .unlink = cifs_unlink,
784 .link = cifs_hardlink,
787 .rename = cifs_rename,
788 .permission = cifs_permission,
789 /* revalidate:cifs_revalidate, */
790 .setattr = cifs_setattr,
791 .symlink = cifs_symlink,
793 #ifdef CONFIG_CIFS_XATTR
794 .setxattr = cifs_setxattr,
795 .getxattr = cifs_getxattr,
796 .listxattr = cifs_listxattr,
797 .removexattr = cifs_removexattr,
801 const struct inode_operations cifs_file_inode_ops = {
802 /* revalidate:cifs_revalidate, */
803 .setattr = cifs_setattr,
804 .getattr = cifs_getattr, /* do we need this anymore? */
805 .rename = cifs_rename,
806 .permission = cifs_permission,
807 #ifdef CONFIG_CIFS_XATTR
808 .setxattr = cifs_setxattr,
809 .getxattr = cifs_getxattr,
810 .listxattr = cifs_listxattr,
811 .removexattr = cifs_removexattr,
815 const struct inode_operations cifs_symlink_inode_ops = {
816 .readlink = generic_readlink,
817 .follow_link = cifs_follow_link,
818 .put_link = cifs_put_link,
819 .permission = cifs_permission,
820 /* BB add the following two eventually */
821 /* revalidate: cifs_revalidate,
822 setattr: cifs_notify_change, *//* BB do we need notify change */
823 #ifdef CONFIG_CIFS_XATTR
824 .setxattr = cifs_setxattr,
825 .getxattr = cifs_getxattr,
826 .listxattr = cifs_listxattr,
827 .removexattr = cifs_removexattr,
831 const struct file_operations cifs_file_ops = {
832 .read = do_sync_read,
833 .write = do_sync_write,
834 .aio_read = generic_file_aio_read,
835 .aio_write = cifs_file_aio_write,
837 .release = cifs_close,
841 .mmap = cifs_file_mmap,
842 .splice_read = generic_file_splice_read,
843 .llseek = cifs_llseek,
844 #ifdef CONFIG_CIFS_POSIX
845 .unlocked_ioctl = cifs_ioctl,
846 #endif /* CONFIG_CIFS_POSIX */
847 .setlease = cifs_setlease,
850 const struct file_operations cifs_file_strict_ops = {
851 .read = do_sync_read,
852 .write = do_sync_write,
853 .aio_read = cifs_strict_readv,
854 .aio_write = cifs_strict_writev,
856 .release = cifs_close,
858 .fsync = cifs_strict_fsync,
860 .mmap = cifs_file_strict_mmap,
861 .splice_read = generic_file_splice_read,
862 .llseek = cifs_llseek,
863 #ifdef CONFIG_CIFS_POSIX
864 .unlocked_ioctl = cifs_ioctl,
865 #endif /* CONFIG_CIFS_POSIX */
866 .setlease = cifs_setlease,
869 const struct file_operations cifs_file_direct_ops = {
870 /* BB reevaluate whether they can be done with directio, no cache */
871 .read = do_sync_read,
872 .write = do_sync_write,
873 .aio_read = cifs_user_readv,
874 .aio_write = cifs_user_writev,
876 .release = cifs_close,
880 .mmap = cifs_file_mmap,
881 .splice_read = generic_file_splice_read,
882 #ifdef CONFIG_CIFS_POSIX
883 .unlocked_ioctl = cifs_ioctl,
884 #endif /* CONFIG_CIFS_POSIX */
885 .llseek = cifs_llseek,
886 .setlease = cifs_setlease,
889 const struct file_operations cifs_file_nobrl_ops = {
890 .read = do_sync_read,
891 .write = do_sync_write,
892 .aio_read = generic_file_aio_read,
893 .aio_write = cifs_file_aio_write,
895 .release = cifs_close,
898 .mmap = cifs_file_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_strict_nobrl_ops = {
908 .read = do_sync_read,
909 .write = do_sync_write,
910 .aio_read = cifs_strict_readv,
911 .aio_write = cifs_strict_writev,
913 .release = cifs_close,
914 .fsync = cifs_strict_fsync,
916 .mmap = cifs_file_strict_mmap,
917 .splice_read = generic_file_splice_read,
918 .llseek = cifs_llseek,
919 #ifdef CONFIG_CIFS_POSIX
920 .unlocked_ioctl = cifs_ioctl,
921 #endif /* CONFIG_CIFS_POSIX */
922 .setlease = cifs_setlease,
925 const struct file_operations cifs_file_direct_nobrl_ops = {
926 /* BB reevaluate whether they can be done with directio, no cache */
927 .read = do_sync_read,
928 .write = do_sync_write,
929 .aio_read = cifs_user_readv,
930 .aio_write = cifs_user_writev,
932 .release = cifs_close,
935 .mmap = cifs_file_mmap,
936 .splice_read = generic_file_splice_read,
937 #ifdef CONFIG_CIFS_POSIX
938 .unlocked_ioctl = cifs_ioctl,
939 #endif /* CONFIG_CIFS_POSIX */
940 .llseek = cifs_llseek,
941 .setlease = cifs_setlease,
944 const struct file_operations cifs_dir_ops = {
945 .readdir = cifs_readdir,
946 .release = cifs_closedir,
947 .read = generic_read_dir,
948 .unlocked_ioctl = cifs_ioctl,
949 .llseek = generic_file_llseek,
953 cifs_init_once(void *inode)
955 struct cifsInodeInfo *cifsi = inode;
957 inode_init_once(&cifsi->vfs_inode);
958 mutex_init(&cifsi->lock_mutex);
962 cifs_init_inodecache(void)
964 cifs_inode_cachep = kmem_cache_create("cifs_inode_cache",
965 sizeof(struct cifsInodeInfo),
966 0, (SLAB_RECLAIM_ACCOUNT|
969 if (cifs_inode_cachep == NULL)
976 cifs_destroy_inodecache(void)
978 kmem_cache_destroy(cifs_inode_cachep);
982 cifs_init_request_bufs(void)
984 if (CIFSMaxBufSize < 8192) {
985 /* Buffer size can not be smaller than 2 * PATH_MAX since maximum
986 Unicode path name has to fit in any SMB/CIFS path based frames */
987 CIFSMaxBufSize = 8192;
988 } else if (CIFSMaxBufSize > 1024*127) {
989 CIFSMaxBufSize = 1024 * 127;
991 CIFSMaxBufSize &= 0x1FE00; /* Round size to even 512 byte mult*/
993 /* cERROR(1, "CIFSMaxBufSize %d 0x%x",CIFSMaxBufSize,CIFSMaxBufSize); */
994 cifs_req_cachep = kmem_cache_create("cifs_request",
996 MAX_CIFS_HDR_SIZE, 0,
997 SLAB_HWCACHE_ALIGN, NULL);
998 if (cifs_req_cachep == NULL)
1001 if (cifs_min_rcv < 1)
1003 else if (cifs_min_rcv > 64) {
1005 cERROR(1, "cifs_min_rcv set to maximum (64)");
1008 cifs_req_poolp = mempool_create_slab_pool(cifs_min_rcv,
1011 if (cifs_req_poolp == NULL) {
1012 kmem_cache_destroy(cifs_req_cachep);
1015 /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and
1016 almost all handle based requests (but not write response, nor is it
1017 sufficient for path based requests). A smaller size would have
1018 been more efficient (compacting multiple slab items on one 4k page)
1019 for the case in which debug was on, but this larger size allows
1020 more SMBs to use small buffer alloc and is still much more
1021 efficient to alloc 1 per page off the slab compared to 17K (5page)
1022 alloc of large cifs buffers even when page debugging is on */
1023 cifs_sm_req_cachep = kmem_cache_create("cifs_small_rq",
1024 MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN,
1026 if (cifs_sm_req_cachep == NULL) {
1027 mempool_destroy(cifs_req_poolp);
1028 kmem_cache_destroy(cifs_req_cachep);
1032 if (cifs_min_small < 2)
1034 else if (cifs_min_small > 256) {
1035 cifs_min_small = 256;
1036 cFYI(1, "cifs_min_small set to maximum (256)");
1039 cifs_sm_req_poolp = mempool_create_slab_pool(cifs_min_small,
1040 cifs_sm_req_cachep);
1042 if (cifs_sm_req_poolp == NULL) {
1043 mempool_destroy(cifs_req_poolp);
1044 kmem_cache_destroy(cifs_req_cachep);
1045 kmem_cache_destroy(cifs_sm_req_cachep);
1053 cifs_destroy_request_bufs(void)
1055 mempool_destroy(cifs_req_poolp);
1056 kmem_cache_destroy(cifs_req_cachep);
1057 mempool_destroy(cifs_sm_req_poolp);
1058 kmem_cache_destroy(cifs_sm_req_cachep);
1062 cifs_init_mids(void)
1064 cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids",
1065 sizeof(struct mid_q_entry), 0,
1066 SLAB_HWCACHE_ALIGN, NULL);
1067 if (cifs_mid_cachep == NULL)
1070 /* 3 is a reasonable minimum number of simultaneous operations */
1071 cifs_mid_poolp = mempool_create_slab_pool(3, cifs_mid_cachep);
1072 if (cifs_mid_poolp == NULL) {
1073 kmem_cache_destroy(cifs_mid_cachep);
1081 cifs_destroy_mids(void)
1083 mempool_destroy(cifs_mid_poolp);
1084 kmem_cache_destroy(cifs_mid_cachep);
1092 INIT_LIST_HEAD(&cifs_tcp_ses_list);
1093 #ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
1094 INIT_LIST_HEAD(&GlobalDnotifyReqList);
1095 INIT_LIST_HEAD(&GlobalDnotifyRsp_Q);
1096 #endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
1098 * Initialize Global counters
1100 atomic_set(&sesInfoAllocCount, 0);
1101 atomic_set(&tconInfoAllocCount, 0);
1102 atomic_set(&tcpSesAllocCount, 0);
1103 atomic_set(&tcpSesReconnectCount, 0);
1104 atomic_set(&tconInfoReconnectCount, 0);
1106 atomic_set(&bufAllocCount, 0);
1107 atomic_set(&smBufAllocCount, 0);
1108 #ifdef CONFIG_CIFS_STATS2
1109 atomic_set(&totBufAllocCount, 0);
1110 atomic_set(&totSmBufAllocCount, 0);
1111 #endif /* CONFIG_CIFS_STATS2 */
1113 atomic_set(&midCount, 0);
1114 GlobalCurrentXid = 0;
1115 GlobalTotalActiveXid = 0;
1116 GlobalMaxActiveXid = 0;
1117 spin_lock_init(&cifs_tcp_ses_lock);
1118 spin_lock_init(&cifs_file_list_lock);
1119 spin_lock_init(&GlobalMid_Lock);
1121 if (cifs_max_pending < 2) {
1122 cifs_max_pending = 2;
1123 cFYI(1, "cifs_max_pending set to min of 2");
1124 } else if (cifs_max_pending > CIFS_MAX_REQ) {
1125 cifs_max_pending = CIFS_MAX_REQ;
1126 cFYI(1, "cifs_max_pending set to max of %u", CIFS_MAX_REQ);
1129 cifsiod_wq = alloc_workqueue("cifsiod", WQ_FREEZABLE|WQ_MEM_RECLAIM, 0);
1132 goto out_clean_proc;
1135 rc = cifs_fscache_register();
1137 goto out_destroy_wq;
1139 rc = cifs_init_inodecache();
1141 goto out_unreg_fscache;
1143 rc = cifs_init_mids();
1145 goto out_destroy_inodecache;
1147 rc = cifs_init_request_bufs();
1149 goto out_destroy_mids;
1151 #ifdef CONFIG_CIFS_UPCALL
1152 rc = register_key_type(&cifs_spnego_key_type);
1154 goto out_destroy_request_bufs;
1155 #endif /* CONFIG_CIFS_UPCALL */
1157 #ifdef CONFIG_CIFS_ACL
1158 rc = init_cifs_idmap();
1160 goto out_register_key_type;
1161 #endif /* CONFIG_CIFS_ACL */
1163 rc = register_filesystem(&cifs_fs_type);
1165 goto out_init_cifs_idmap;
1169 out_init_cifs_idmap:
1170 #ifdef CONFIG_CIFS_ACL
1172 out_register_key_type:
1174 #ifdef CONFIG_CIFS_UPCALL
1175 unregister_key_type(&cifs_spnego_key_type);
1176 out_destroy_request_bufs:
1178 cifs_destroy_request_bufs();
1180 cifs_destroy_mids();
1181 out_destroy_inodecache:
1182 cifs_destroy_inodecache();
1184 cifs_fscache_unregister();
1186 destroy_workqueue(cifsiod_wq);
1195 cFYI(DBG2, "exit_cifs");
1196 unregister_filesystem(&cifs_fs_type);
1197 cifs_dfs_release_automount_timer();
1198 #ifdef CONFIG_CIFS_ACL
1199 cifs_destroy_idmaptrees();
1202 #ifdef CONFIG_CIFS_UPCALL
1203 unregister_key_type(&cifs_spnego_key_type);
1205 cifs_destroy_request_bufs();
1206 cifs_destroy_mids();
1207 cifs_destroy_inodecache();
1208 cifs_fscache_unregister();
1209 destroy_workqueue(cifsiod_wq);
1213 MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>");
1214 MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */
1216 ("VFS to access servers complying with the SNIA CIFS Specification "
1217 "e.g. Samba and Windows");
1218 MODULE_VERSION(CIFS_VERSION);
1219 module_init(init_cifs)
1220 module_exit(exit_cifs)