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, 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 module_param(enable_oplocks, bool, 0644);
86 MODULE_PARM_DESC(enable_oplocks, "Enable or disable oplocks (bool). Default:"
89 extern mempool_t *cifs_sm_req_poolp;
90 extern mempool_t *cifs_req_poolp;
91 extern mempool_t *cifs_mid_poolp;
94 cifs_read_super(struct super_block *sb)
97 struct cifs_sb_info *cifs_sb;
100 cifs_sb = CIFS_SB(sb);
102 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIXACL)
103 sb->s_flags |= MS_POSIXACL;
105 if (cifs_sb_master_tcon(cifs_sb)->ses->capabilities & CAP_LARGE_FILES)
106 sb->s_maxbytes = MAX_LFS_FILESIZE;
108 sb->s_maxbytes = MAX_NON_LFS;
110 /* BB FIXME fix time_gran to be larger for LANMAN sessions */
111 sb->s_time_gran = 100;
113 sb->s_magic = CIFS_MAGIC_NUMBER;
114 sb->s_op = &cifs_super_ops;
115 sb->s_bdi = &cifs_sb->bdi;
116 sb->s_blocksize = CIFS_MAX_MSGSIZE;
117 sb->s_blocksize_bits = 14; /* default 2**14 = CIFS_MAX_MSGSIZE */
118 inode = cifs_root_iget(sb);
126 sb->s_root = d_alloc_root(inode);
133 /* do that *after* d_alloc_root() - we want NULL ->d_op for root here */
134 if (cifs_sb_master_tcon(cifs_sb)->nocase)
135 sb->s_d_op = &cifs_ci_dentry_ops;
137 sb->s_d_op = &cifs_dentry_ops;
139 #ifdef CONFIG_CIFS_NFSD_EXPORT
140 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
141 cFYI(1, "export ops supported");
142 sb->s_export_op = &cifs_export_ops;
144 #endif /* CONFIG_CIFS_NFSD_EXPORT */
149 cERROR(1, "cifs_read_super: get root inode failed");
156 static void cifs_kill_sb(struct super_block *sb)
158 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
160 cifs_umount(cifs_sb);
164 cifs_statfs(struct dentry *dentry, struct kstatfs *buf)
166 struct super_block *sb = dentry->d_sb;
167 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
168 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
169 int rc = -EOPNOTSUPP;
174 buf->f_type = CIFS_MAGIC_NUMBER;
177 * PATH_MAX may be too long - it would presumably be total path,
178 * but note that some servers (includinng Samba 3) have a shorter
181 * Instead could get the real value via SMB_QUERY_FS_ATTRIBUTE_INFO.
183 buf->f_namelen = PATH_MAX;
184 buf->f_files = 0; /* undefined */
185 buf->f_ffree = 0; /* unlimited */
188 * We could add a second check for a QFS Unix capability bit
190 if ((tcon->ses->capabilities & CAP_UNIX) &&
191 (CIFS_POSIX_EXTENSIONS & le64_to_cpu(tcon->fsUnixInfo.Capability)))
192 rc = CIFSSMBQFSPosixInfo(xid, tcon, buf);
195 * Only need to call the old QFSInfo if failed on newer one,
198 if (rc && (tcon->ses->capabilities & CAP_NT_SMBS))
199 rc = CIFSSMBQFSInfo(xid, tcon, buf);
202 * Some old Windows servers also do not support level 103, retry with
203 * older level one if old server failed the previous call or we
204 * bypassed it because we detected that this was an older LANMAN sess
207 rc = SMBOldQFSInfo(xid, tcon, buf);
213 static int cifs_permission(struct inode *inode, int mask)
215 struct cifs_sb_info *cifs_sb;
217 cifs_sb = CIFS_SB(inode->i_sb);
219 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) {
220 if ((mask & MAY_EXEC) && !execute_ok(inode))
224 } else /* file mode might have been restricted at mount time
225 on the client (above and beyond ACL on servers) for
226 servers which do not support setting and viewing mode bits,
227 so allowing client to check permissions is useful */
228 return generic_permission(inode, mask);
231 static struct kmem_cache *cifs_inode_cachep;
232 static struct kmem_cache *cifs_req_cachep;
233 static struct kmem_cache *cifs_mid_cachep;
234 static struct kmem_cache *cifs_sm_req_cachep;
235 mempool_t *cifs_sm_req_poolp;
236 mempool_t *cifs_req_poolp;
237 mempool_t *cifs_mid_poolp;
239 static struct inode *
240 cifs_alloc_inode(struct super_block *sb)
242 struct cifsInodeInfo *cifs_inode;
243 cifs_inode = kmem_cache_alloc(cifs_inode_cachep, GFP_KERNEL);
246 cifs_inode->cifsAttrs = 0x20; /* default */
247 cifs_inode->time = 0;
248 /* Until the file is open and we have gotten oplock
249 info back from the server, can not assume caching of
250 file data or metadata */
251 cifs_set_oplock_level(cifs_inode, 0);
252 cifs_inode->delete_pending = false;
253 cifs_inode->invalid_mapping = false;
254 cifs_inode->vfs_inode.i_blkbits = 14; /* 2**14 = CIFS_MAX_MSGSIZE */
255 cifs_inode->server_eof = 0;
256 cifs_inode->uniqueid = 0;
257 cifs_inode->createtime = 0;
259 /* Can not set i_flags here - they get immediately overwritten
260 to zero by the VFS */
261 /* cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME;*/
262 INIT_LIST_HEAD(&cifs_inode->openFileList);
263 return &cifs_inode->vfs_inode;
266 static void cifs_i_callback(struct rcu_head *head)
268 struct inode *inode = container_of(head, struct inode, i_rcu);
269 INIT_LIST_HEAD(&inode->i_dentry);
270 kmem_cache_free(cifs_inode_cachep, CIFS_I(inode));
274 cifs_destroy_inode(struct inode *inode)
276 call_rcu(&inode->i_rcu, cifs_i_callback);
280 cifs_evict_inode(struct inode *inode)
282 truncate_inode_pages(&inode->i_data, 0);
283 end_writeback(inode);
284 cifs_fscache_release_inode_cookie(inode);
288 cifs_show_address(struct seq_file *s, struct TCP_Server_Info *server)
290 struct sockaddr_in *sa = (struct sockaddr_in *) &server->dstaddr;
291 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *) &server->dstaddr;
293 seq_printf(s, ",addr=");
295 switch (server->dstaddr.ss_family) {
297 seq_printf(s, "%pI4", &sa->sin_addr.s_addr);
300 seq_printf(s, "%pI6", &sa6->sin6_addr.s6_addr);
301 if (sa6->sin6_scope_id)
302 seq_printf(s, "%%%u", sa6->sin6_scope_id);
305 seq_printf(s, "(unknown)");
310 cifs_show_security(struct seq_file *s, struct TCP_Server_Info *server)
312 seq_printf(s, ",sec=");
314 switch (server->secType) {
316 seq_printf(s, "lanman");
319 seq_printf(s, "ntlmv2");
322 seq_printf(s, "ntlm");
325 seq_printf(s, "krb5");
328 seq_printf(s, "ntlmssp");
331 /* shouldn't ever happen */
332 seq_printf(s, "unknown");
336 if (server->sec_mode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
341 * cifs_show_options() is for displaying mount options in /proc/mounts.
342 * Not all settable options are displayed but most of the important
346 cifs_show_options(struct seq_file *s, struct vfsmount *m)
348 struct cifs_sb_info *cifs_sb = CIFS_SB(m->mnt_sb);
349 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
350 struct sockaddr *srcaddr;
351 srcaddr = (struct sockaddr *)&tcon->ses->server->srcaddr;
353 cifs_show_security(s, tcon->ses->server);
355 seq_printf(s, ",unc=%s", tcon->treeName);
357 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER)
358 seq_printf(s, ",multiuser");
359 else if (tcon->ses->user_name)
360 seq_printf(s, ",username=%s", tcon->ses->user_name);
362 if (tcon->ses->domainName)
363 seq_printf(s, ",domain=%s", tcon->ses->domainName);
365 if (srcaddr->sa_family != AF_UNSPEC) {
366 struct sockaddr_in *saddr4;
367 struct sockaddr_in6 *saddr6;
368 saddr4 = (struct sockaddr_in *)srcaddr;
369 saddr6 = (struct sockaddr_in6 *)srcaddr;
370 if (srcaddr->sa_family == AF_INET6)
371 seq_printf(s, ",srcaddr=%pI6c",
373 else if (srcaddr->sa_family == AF_INET)
374 seq_printf(s, ",srcaddr=%pI4",
375 &saddr4->sin_addr.s_addr);
377 seq_printf(s, ",srcaddr=BAD-AF:%i",
378 (int)(srcaddr->sa_family));
381 seq_printf(s, ",uid=%d", cifs_sb->mnt_uid);
382 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)
383 seq_printf(s, ",forceuid");
385 seq_printf(s, ",noforceuid");
387 seq_printf(s, ",gid=%d", cifs_sb->mnt_gid);
388 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)
389 seq_printf(s, ",forcegid");
391 seq_printf(s, ",noforcegid");
393 cifs_show_address(s, tcon->ses->server);
396 seq_printf(s, ",file_mode=0%o,dir_mode=0%o",
397 cifs_sb->mnt_file_mode,
398 cifs_sb->mnt_dir_mode);
400 seq_printf(s, ",seal");
402 seq_printf(s, ",nocase");
404 seq_printf(s, ",hard");
406 seq_printf(s, ",unix");
408 seq_printf(s, ",nounix");
409 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
410 seq_printf(s, ",posixpaths");
411 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)
412 seq_printf(s, ",setuids");
413 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
414 seq_printf(s, ",serverino");
415 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RWPIDFORWARD)
416 seq_printf(s, ",rwpidforward");
417 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL)
418 seq_printf(s, ",forcemand");
419 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO)
420 seq_printf(s, ",directio");
421 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
422 seq_printf(s, ",nouser_xattr");
423 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR)
424 seq_printf(s, ",mapchars");
425 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)
426 seq_printf(s, ",sfu");
427 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
428 seq_printf(s, ",nobrl");
429 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
430 seq_printf(s, ",cifsacl");
431 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)
432 seq_printf(s, ",dynperm");
433 if (m->mnt_sb->s_flags & MS_POSIXACL)
434 seq_printf(s, ",acl");
435 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS)
436 seq_printf(s, ",mfsymlinks");
437 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_FSCACHE)
438 seq_printf(s, ",fsc");
439 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_STRICT_IO)
440 seq_printf(s, ",strictcache");
442 seq_printf(s, ",rsize=%d", cifs_sb->rsize);
443 seq_printf(s, ",wsize=%d", 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 vfsmount *mnt)
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_unlocked(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->lockList);
952 cifs_init_inodecache(void)
954 cifs_inode_cachep = kmem_cache_create("cifs_inode_cache",
955 sizeof(struct cifsInodeInfo),
956 0, (SLAB_RECLAIM_ACCOUNT|
959 if (cifs_inode_cachep == NULL)
966 cifs_destroy_inodecache(void)
968 kmem_cache_destroy(cifs_inode_cachep);
972 cifs_init_request_bufs(void)
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",
986 MAX_CIFS_HDR_SIZE, 0,
987 SLAB_HWCACHE_ALIGN, NULL);
988 if (cifs_req_cachep == NULL)
991 if (cifs_min_rcv < 1)
993 else if (cifs_min_rcv > 64) {
995 cERROR(1, "cifs_min_rcv set to maximum (64)");
998 cifs_req_poolp = mempool_create_slab_pool(cifs_min_rcv,
1001 if (cifs_req_poolp == NULL) {
1002 kmem_cache_destroy(cifs_req_cachep);
1005 /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and
1006 almost all handle based requests (but not write response, nor is it
1007 sufficient for path based requests). A smaller size would have
1008 been more efficient (compacting multiple slab items on one 4k page)
1009 for the case in which debug was on, but this larger size allows
1010 more SMBs to use small buffer alloc and is still much more
1011 efficient to alloc 1 per page off the slab compared to 17K (5page)
1012 alloc of large cifs buffers even when page debugging is on */
1013 cifs_sm_req_cachep = kmem_cache_create("cifs_small_rq",
1014 MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN,
1016 if (cifs_sm_req_cachep == NULL) {
1017 mempool_destroy(cifs_req_poolp);
1018 kmem_cache_destroy(cifs_req_cachep);
1022 if (cifs_min_small < 2)
1024 else if (cifs_min_small > 256) {
1025 cifs_min_small = 256;
1026 cFYI(1, "cifs_min_small set to maximum (256)");
1029 cifs_sm_req_poolp = mempool_create_slab_pool(cifs_min_small,
1030 cifs_sm_req_cachep);
1032 if (cifs_sm_req_poolp == NULL) {
1033 mempool_destroy(cifs_req_poolp);
1034 kmem_cache_destroy(cifs_req_cachep);
1035 kmem_cache_destroy(cifs_sm_req_cachep);
1043 cifs_destroy_request_bufs(void)
1045 mempool_destroy(cifs_req_poolp);
1046 kmem_cache_destroy(cifs_req_cachep);
1047 mempool_destroy(cifs_sm_req_poolp);
1048 kmem_cache_destroy(cifs_sm_req_cachep);
1052 cifs_init_mids(void)
1054 cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids",
1055 sizeof(struct mid_q_entry), 0,
1056 SLAB_HWCACHE_ALIGN, NULL);
1057 if (cifs_mid_cachep == NULL)
1060 /* 3 is a reasonable minimum number of simultaneous operations */
1061 cifs_mid_poolp = mempool_create_slab_pool(3, cifs_mid_cachep);
1062 if (cifs_mid_poolp == NULL) {
1063 kmem_cache_destroy(cifs_mid_cachep);
1071 cifs_destroy_mids(void)
1073 mempool_destroy(cifs_mid_poolp);
1074 kmem_cache_destroy(cifs_mid_cachep);
1082 INIT_LIST_HEAD(&cifs_tcp_ses_list);
1083 #ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
1084 INIT_LIST_HEAD(&GlobalDnotifyReqList);
1085 INIT_LIST_HEAD(&GlobalDnotifyRsp_Q);
1086 #endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
1088 * Initialize Global counters
1090 atomic_set(&sesInfoAllocCount, 0);
1091 atomic_set(&tconInfoAllocCount, 0);
1092 atomic_set(&tcpSesAllocCount, 0);
1093 atomic_set(&tcpSesReconnectCount, 0);
1094 atomic_set(&tconInfoReconnectCount, 0);
1096 atomic_set(&bufAllocCount, 0);
1097 atomic_set(&smBufAllocCount, 0);
1098 #ifdef CONFIG_CIFS_STATS2
1099 atomic_set(&totBufAllocCount, 0);
1100 atomic_set(&totSmBufAllocCount, 0);
1101 #endif /* CONFIG_CIFS_STATS2 */
1103 atomic_set(&midCount, 0);
1104 GlobalCurrentXid = 0;
1105 GlobalTotalActiveXid = 0;
1106 GlobalMaxActiveXid = 0;
1107 spin_lock_init(&cifs_tcp_ses_lock);
1108 spin_lock_init(&cifs_file_list_lock);
1109 spin_lock_init(&GlobalMid_Lock);
1111 if (cifs_max_pending < 2) {
1112 cifs_max_pending = 2;
1113 cFYI(1, "cifs_max_pending set to min of 2");
1114 } else if (cifs_max_pending > 256) {
1115 cifs_max_pending = 256;
1116 cFYI(1, "cifs_max_pending set to max of 256");
1119 rc = cifs_fscache_register();
1121 goto out_clean_proc;
1123 rc = cifs_init_inodecache();
1125 goto out_unreg_fscache;
1127 rc = cifs_init_mids();
1129 goto out_destroy_inodecache;
1131 rc = cifs_init_request_bufs();
1133 goto out_destroy_mids;
1135 #ifdef CONFIG_CIFS_UPCALL
1136 rc = register_key_type(&cifs_spnego_key_type);
1138 goto out_destroy_request_bufs;
1139 #endif /* CONFIG_CIFS_UPCALL */
1141 #ifdef CONFIG_CIFS_ACL
1142 rc = init_cifs_idmap();
1144 goto out_register_key_type;
1145 #endif /* CONFIG_CIFS_ACL */
1147 rc = register_filesystem(&cifs_fs_type);
1149 goto out_init_cifs_idmap;
1153 out_init_cifs_idmap:
1154 #ifdef CONFIG_CIFS_ACL
1156 out_register_key_type:
1158 #ifdef CONFIG_CIFS_UPCALL
1159 unregister_key_type(&cifs_spnego_key_type);
1160 out_destroy_request_bufs:
1162 cifs_destroy_request_bufs();
1164 cifs_destroy_mids();
1165 out_destroy_inodecache:
1166 cifs_destroy_inodecache();
1168 cifs_fscache_unregister();
1177 cFYI(DBG2, "exit_cifs");
1179 cifs_fscache_unregister();
1180 #ifdef CONFIG_CIFS_DFS_UPCALL
1181 cifs_dfs_release_automount_timer();
1183 #ifdef CONFIG_CIFS_ACL
1184 cifs_destroy_idmaptrees();
1187 #ifdef CONFIG_CIFS_UPCALL
1188 unregister_key_type(&cifs_spnego_key_type);
1190 unregister_filesystem(&cifs_fs_type);
1191 cifs_destroy_inodecache();
1192 cifs_destroy_mids();
1193 cifs_destroy_request_bufs();
1196 MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>");
1197 MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */
1199 ("VFS to access servers complying with the SNIA CIFS Specification "
1200 "e.g. Samba and Windows");
1201 MODULE_VERSION(CIFS_VERSION);
1202 module_init(init_cifs)
1203 module_exit(exit_cifs)