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 unsigned int oplockEnabled = 1;
57 unsigned int linuxExtEnabled = 1;
58 unsigned int lookupCacheEnabled = 1;
59 unsigned int multiuser_mount = 0;
60 unsigned int global_secflags = CIFSSEC_DEF;
61 /* unsigned int ntlmv2_support = 0; */
62 unsigned int sign_CIFS_PDUs = 1;
63 static const struct super_operations cifs_super_ops;
64 unsigned int CIFSMaxBufSize = CIFS_MAX_MSGSIZE;
65 module_param(CIFSMaxBufSize, int, 0);
66 MODULE_PARM_DESC(CIFSMaxBufSize, "Network buffer size (not including header). "
67 "Default: 16384 Range: 8192 to 130048");
68 unsigned int cifs_min_rcv = CIFS_MIN_RCV_POOL;
69 module_param(cifs_min_rcv, int, 0);
70 MODULE_PARM_DESC(cifs_min_rcv, "Network buffers in pool. Default: 4 Range: "
72 unsigned int cifs_min_small = 30;
73 module_param(cifs_min_small, int, 0);
74 MODULE_PARM_DESC(cifs_min_small, "Small network buffers in pool. Default: 30 "
76 unsigned int cifs_max_pending = CIFS_MAX_REQ;
77 module_param(cifs_max_pending, int, 0);
78 MODULE_PARM_DESC(cifs_max_pending, "Simultaneous requests to server. "
79 "Default: 50 Range: 2 to 256");
80 unsigned short echo_retries = 5;
81 module_param(echo_retries, ushort, 0644);
82 MODULE_PARM_DESC(echo_retries, "Number of echo attempts before giving up and "
83 "reconnecting server. Default: 5. 0 means "
85 extern mempool_t *cifs_sm_req_poolp;
86 extern mempool_t *cifs_req_poolp;
87 extern mempool_t *cifs_mid_poolp;
90 cifs_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);
122 sb->s_root = d_alloc_root(inode);
129 /* do that *after* d_alloc_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 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 /* CIFS_NFSD_EXPORT */
145 cERROR(1, "cifs_read_super: get root inode failed");
152 static void cifs_kill_sb(struct super_block *sb)
154 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
156 cifs_umount(cifs_sb);
160 cifs_statfs(struct dentry *dentry, struct kstatfs *buf)
162 struct super_block *sb = dentry->d_sb;
163 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
164 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
165 int rc = -EOPNOTSUPP;
170 buf->f_type = CIFS_MAGIC_NUMBER;
173 * PATH_MAX may be too long - it would presumably be total path,
174 * but note that some servers (includinng Samba 3) have a shorter
177 * Instead could get the real value via SMB_QUERY_FS_ATTRIBUTE_INFO.
179 buf->f_namelen = PATH_MAX;
180 buf->f_files = 0; /* undefined */
181 buf->f_ffree = 0; /* unlimited */
184 * We could add a second check for a QFS Unix capability bit
186 if ((tcon->ses->capabilities & CAP_UNIX) &&
187 (CIFS_POSIX_EXTENSIONS & le64_to_cpu(tcon->fsUnixInfo.Capability)))
188 rc = CIFSSMBQFSPosixInfo(xid, tcon, buf);
191 * Only need to call the old QFSInfo if failed on newer one,
194 if (rc && (tcon->ses->capabilities & CAP_NT_SMBS))
195 rc = CIFSSMBQFSInfo(xid, tcon, buf);
198 * Some old Windows servers also do not support level 103, retry with
199 * older level one if old server failed the previous call or we
200 * bypassed it because we detected that this was an older LANMAN sess
203 rc = SMBOldQFSInfo(xid, tcon, buf);
209 static int cifs_permission(struct inode *inode, int mask)
211 struct cifs_sb_info *cifs_sb;
213 cifs_sb = CIFS_SB(inode->i_sb);
215 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) {
216 if ((mask & MAY_EXEC) && !execute_ok(inode))
220 } else /* file mode might have been restricted at mount time
221 on the client (above and beyond ACL on servers) for
222 servers which do not support setting and viewing mode bits,
223 so allowing client to check permissions is useful */
224 return generic_permission(inode, mask);
227 static struct kmem_cache *cifs_inode_cachep;
228 static struct kmem_cache *cifs_req_cachep;
229 static struct kmem_cache *cifs_mid_cachep;
230 static struct kmem_cache *cifs_sm_req_cachep;
231 mempool_t *cifs_sm_req_poolp;
232 mempool_t *cifs_req_poolp;
233 mempool_t *cifs_mid_poolp;
235 static struct inode *
236 cifs_alloc_inode(struct super_block *sb)
238 struct cifsInodeInfo *cifs_inode;
239 cifs_inode = kmem_cache_alloc(cifs_inode_cachep, GFP_KERNEL);
242 cifs_inode->cifsAttrs = 0x20; /* default */
243 cifs_inode->time = 0;
244 /* Until the file is open and we have gotten oplock
245 info back from the server, can not assume caching of
246 file data or metadata */
247 cifs_set_oplock_level(cifs_inode, 0);
248 cifs_inode->delete_pending = false;
249 cifs_inode->invalid_mapping = false;
250 cifs_inode->vfs_inode.i_blkbits = 14; /* 2**14 = CIFS_MAX_MSGSIZE */
251 cifs_inode->server_eof = 0;
252 cifs_inode->uniqueid = 0;
253 cifs_inode->createtime = 0;
255 /* Can not set i_flags here - they get immediately overwritten
256 to zero by the VFS */
257 /* cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME;*/
258 INIT_LIST_HEAD(&cifs_inode->openFileList);
259 return &cifs_inode->vfs_inode;
262 static void cifs_i_callback(struct rcu_head *head)
264 struct inode *inode = container_of(head, struct inode, i_rcu);
265 INIT_LIST_HEAD(&inode->i_dentry);
266 kmem_cache_free(cifs_inode_cachep, CIFS_I(inode));
270 cifs_destroy_inode(struct inode *inode)
272 call_rcu(&inode->i_rcu, cifs_i_callback);
276 cifs_evict_inode(struct inode *inode)
278 truncate_inode_pages(&inode->i_data, 0);
279 end_writeback(inode);
280 cifs_fscache_release_inode_cookie(inode);
284 cifs_show_address(struct seq_file *s, struct TCP_Server_Info *server)
286 struct sockaddr_in *sa = (struct sockaddr_in *) &server->dstaddr;
287 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *) &server->dstaddr;
289 seq_printf(s, ",addr=");
291 switch (server->dstaddr.ss_family) {
293 seq_printf(s, "%pI4", &sa->sin_addr.s_addr);
296 seq_printf(s, "%pI6", &sa6->sin6_addr.s6_addr);
297 if (sa6->sin6_scope_id)
298 seq_printf(s, "%%%u", sa6->sin6_scope_id);
301 seq_printf(s, "(unknown)");
306 cifs_show_security(struct seq_file *s, struct TCP_Server_Info *server)
308 seq_printf(s, ",sec=");
310 switch (server->secType) {
312 seq_printf(s, "lanman");
315 seq_printf(s, "ntlmv2");
318 seq_printf(s, "ntlm");
321 seq_printf(s, "krb5");
324 seq_printf(s, "ntlmssp");
327 /* shouldn't ever happen */
328 seq_printf(s, "unknown");
332 if (server->sec_mode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
337 * cifs_show_options() is for displaying mount options in /proc/mounts.
338 * Not all settable options are displayed but most of the important
342 cifs_show_options(struct seq_file *s, struct vfsmount *m)
344 struct cifs_sb_info *cifs_sb = CIFS_SB(m->mnt_sb);
345 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
346 struct sockaddr *srcaddr;
347 srcaddr = (struct sockaddr *)&tcon->ses->server->srcaddr;
349 cifs_show_security(s, tcon->ses->server);
351 seq_printf(s, ",unc=%s", tcon->treeName);
353 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER)
354 seq_printf(s, ",multiuser");
355 else if (tcon->ses->user_name)
356 seq_printf(s, ",username=%s", tcon->ses->user_name);
358 if (tcon->ses->domainName)
359 seq_printf(s, ",domain=%s", tcon->ses->domainName);
361 if (srcaddr->sa_family != AF_UNSPEC) {
362 struct sockaddr_in *saddr4;
363 struct sockaddr_in6 *saddr6;
364 saddr4 = (struct sockaddr_in *)srcaddr;
365 saddr6 = (struct sockaddr_in6 *)srcaddr;
366 if (srcaddr->sa_family == AF_INET6)
367 seq_printf(s, ",srcaddr=%pI6c",
369 else if (srcaddr->sa_family == AF_INET)
370 seq_printf(s, ",srcaddr=%pI4",
371 &saddr4->sin_addr.s_addr);
373 seq_printf(s, ",srcaddr=BAD-AF:%i",
374 (int)(srcaddr->sa_family));
377 seq_printf(s, ",uid=%d", cifs_sb->mnt_uid);
378 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)
379 seq_printf(s, ",forceuid");
381 seq_printf(s, ",noforceuid");
383 seq_printf(s, ",gid=%d", cifs_sb->mnt_gid);
384 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)
385 seq_printf(s, ",forcegid");
387 seq_printf(s, ",noforcegid");
389 cifs_show_address(s, tcon->ses->server);
392 seq_printf(s, ",file_mode=0%o,dir_mode=0%o",
393 cifs_sb->mnt_file_mode,
394 cifs_sb->mnt_dir_mode);
396 seq_printf(s, ",seal");
398 seq_printf(s, ",nocase");
400 seq_printf(s, ",hard");
402 seq_printf(s, ",unix");
404 seq_printf(s, ",nounix");
405 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
406 seq_printf(s, ",posixpaths");
407 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)
408 seq_printf(s, ",setuids");
409 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
410 seq_printf(s, ",serverino");
411 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RWPIDFORWARD)
412 seq_printf(s, ",rwpidforward");
413 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL)
414 seq_printf(s, ",forcemand");
415 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO)
416 seq_printf(s, ",directio");
417 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
418 seq_printf(s, ",nouser_xattr");
419 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR)
420 seq_printf(s, ",mapchars");
421 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)
422 seq_printf(s, ",sfu");
423 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
424 seq_printf(s, ",nobrl");
425 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
426 seq_printf(s, ",cifsacl");
427 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)
428 seq_printf(s, ",dynperm");
429 if (m->mnt_sb->s_flags & MS_POSIXACL)
430 seq_printf(s, ",acl");
431 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS)
432 seq_printf(s, ",mfsymlinks");
433 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_FSCACHE)
434 seq_printf(s, ",fsc");
436 seq_printf(s, ",rsize=%d", cifs_sb->rsize);
437 seq_printf(s, ",wsize=%d", cifs_sb->wsize);
438 /* convert actimeo and display it in seconds */
439 seq_printf(s, ",actimeo=%lu", cifs_sb->actimeo / HZ);
444 static void cifs_umount_begin(struct super_block *sb)
446 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
447 struct cifs_tcon *tcon;
452 tcon = cifs_sb_master_tcon(cifs_sb);
454 spin_lock(&cifs_tcp_ses_lock);
455 if ((tcon->tc_count > 1) || (tcon->tidStatus == CifsExiting)) {
456 /* we have other mounts to same share or we have
457 already tried to force umount this and woken up
458 all waiting network requests, nothing to do */
459 spin_unlock(&cifs_tcp_ses_lock);
461 } else if (tcon->tc_count == 1)
462 tcon->tidStatus = CifsExiting;
463 spin_unlock(&cifs_tcp_ses_lock);
465 /* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */
466 /* cancel_notify_requests(tcon); */
467 if (tcon->ses && tcon->ses->server) {
468 cFYI(1, "wake up tasks now - umount begin not complete");
469 wake_up_all(&tcon->ses->server->request_q);
470 wake_up_all(&tcon->ses->server->response_q);
471 msleep(1); /* yield */
472 /* we have to kick the requests once more */
473 wake_up_all(&tcon->ses->server->response_q);
480 #ifdef CONFIG_CIFS_STATS2
481 static int cifs_show_stats(struct seq_file *s, struct vfsmount *mnt)
488 static int cifs_remount(struct super_block *sb, int *flags, char *data)
490 *flags |= MS_NODIRATIME;
494 static int cifs_drop_inode(struct inode *inode)
496 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
498 /* no serverino => unconditional eviction */
499 return !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) ||
500 generic_drop_inode(inode);
503 static const struct super_operations cifs_super_ops = {
504 .statfs = cifs_statfs,
505 .alloc_inode = cifs_alloc_inode,
506 .destroy_inode = cifs_destroy_inode,
507 .drop_inode = cifs_drop_inode,
508 .evict_inode = cifs_evict_inode,
509 /* .delete_inode = cifs_delete_inode, */ /* Do not need above
510 function unless later we add lazy close of inodes or unless the
511 kernel forgets to call us with the same number of releases (closes)
513 .show_options = cifs_show_options,
514 .umount_begin = cifs_umount_begin,
515 .remount_fs = cifs_remount,
516 #ifdef CONFIG_CIFS_STATS2
517 .show_stats = cifs_show_stats,
522 * Get root dentry from superblock according to prefix path mount option.
523 * Return dentry with refcount + 1 on success and NULL otherwise.
525 static struct dentry *
526 cifs_get_root(struct smb_vol *vol, struct super_block *sb)
528 struct dentry *dentry;
529 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
530 char *full_path = NULL;
535 full_path = cifs_build_path_to_root(vol, cifs_sb,
536 cifs_sb_master_tcon(cifs_sb));
537 if (full_path == NULL)
538 return ERR_PTR(-ENOMEM);
540 cFYI(1, "Get root dentry for %s", full_path);
543 sep = CIFS_DIR_SEP(cifs_sb);
544 dentry = dget(sb->s_root);
548 struct inode *dir = dentry->d_inode;
549 struct dentry *child;
551 /* skip separators */
558 while (*s && *s != sep)
561 mutex_lock(&dir->i_mutex);
562 child = lookup_one_len(p, dentry, s - p);
563 mutex_unlock(&dir->i_mutex);
566 } while (!IS_ERR(dentry));
572 static int cifs_set_super(struct super_block *sb, void *data)
574 struct cifs_mnt_data *mnt_data = data;
575 sb->s_fs_info = mnt_data->cifs_sb;
576 return set_anon_super(sb, NULL);
579 static struct dentry *
580 cifs_do_mount(struct file_system_type *fs_type,
581 int flags, const char *dev_name, void *data)
584 struct super_block *sb;
585 struct cifs_sb_info *cifs_sb;
586 struct smb_vol *volume_info;
587 struct cifs_mnt_data mnt_data;
590 cFYI(1, "Devname: %s flags: %d ", dev_name, flags);
592 volume_info = cifs_get_volume_info((char *)data, dev_name);
593 if (IS_ERR(volume_info))
594 return ERR_CAST(volume_info);
596 cifs_sb = kzalloc(sizeof(struct cifs_sb_info), GFP_KERNEL);
597 if (cifs_sb == NULL) {
598 root = ERR_PTR(-ENOMEM);
602 cifs_sb->mountdata = kstrndup(data, PAGE_SIZE, GFP_KERNEL);
603 if (cifs_sb->mountdata == NULL) {
604 root = ERR_PTR(-ENOMEM);
608 cifs_setup_cifs_sb(volume_info, cifs_sb);
610 rc = cifs_mount(cifs_sb, volume_info);
612 if (!(flags & MS_SILENT))
613 cERROR(1, "cifs_mount failed w/return code = %d", rc);
618 mnt_data.vol = volume_info;
619 mnt_data.cifs_sb = cifs_sb;
620 mnt_data.flags = flags;
622 sb = sget(fs_type, cifs_match_super, cifs_set_super, &mnt_data);
625 cifs_umount(cifs_sb);
630 cFYI(1, "Use existing superblock");
631 cifs_umount(cifs_sb);
634 /* BB should we make this contingent on mount parm? */
635 sb->s_flags |= MS_NODIRATIME | MS_NOATIME;
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_unlocked(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 .lookup = cifs_lookup,
763 .getattr = cifs_getattr,
764 .unlink = cifs_unlink,
765 .link = cifs_hardlink,
768 .rename = cifs_rename,
769 .permission = cifs_permission,
770 /* revalidate:cifs_revalidate, */
771 .setattr = cifs_setattr,
772 .symlink = cifs_symlink,
774 #ifdef CONFIG_CIFS_XATTR
775 .setxattr = cifs_setxattr,
776 .getxattr = cifs_getxattr,
777 .listxattr = cifs_listxattr,
778 .removexattr = cifs_removexattr,
782 const struct inode_operations cifs_file_inode_ops = {
783 /* revalidate:cifs_revalidate, */
784 .setattr = cifs_setattr,
785 .getattr = cifs_getattr, /* do we need this anymore? */
786 .rename = cifs_rename,
787 .permission = cifs_permission,
788 #ifdef CONFIG_CIFS_XATTR
789 .setxattr = cifs_setxattr,
790 .getxattr = cifs_getxattr,
791 .listxattr = cifs_listxattr,
792 .removexattr = cifs_removexattr,
796 const struct inode_operations cifs_symlink_inode_ops = {
797 .readlink = generic_readlink,
798 .follow_link = cifs_follow_link,
799 .put_link = cifs_put_link,
800 .permission = cifs_permission,
801 /* BB add the following two eventually */
802 /* revalidate: cifs_revalidate,
803 setattr: cifs_notify_change, *//* BB do we need notify change */
804 #ifdef CONFIG_CIFS_XATTR
805 .setxattr = cifs_setxattr,
806 .getxattr = cifs_getxattr,
807 .listxattr = cifs_listxattr,
808 .removexattr = cifs_removexattr,
812 const struct file_operations cifs_file_ops = {
813 .read = do_sync_read,
814 .write = do_sync_write,
815 .aio_read = generic_file_aio_read,
816 .aio_write = cifs_file_aio_write,
818 .release = cifs_close,
822 .mmap = cifs_file_mmap,
823 .splice_read = generic_file_splice_read,
824 .llseek = cifs_llseek,
825 #ifdef CONFIG_CIFS_POSIX
826 .unlocked_ioctl = cifs_ioctl,
827 #endif /* CONFIG_CIFS_POSIX */
828 .setlease = cifs_setlease,
831 const struct file_operations cifs_file_strict_ops = {
832 .read = do_sync_read,
833 .write = do_sync_write,
834 .aio_read = cifs_strict_readv,
835 .aio_write = cifs_strict_writev,
837 .release = cifs_close,
839 .fsync = cifs_strict_fsync,
841 .mmap = cifs_file_strict_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_direct_ops = {
851 /* BB reevaluate whether they can be done with directio, no cache */
852 .read = do_sync_read,
853 .write = do_sync_write,
854 .aio_read = cifs_user_readv,
855 .aio_write = cifs_user_writev,
857 .release = cifs_close,
861 .mmap = cifs_file_mmap,
862 .splice_read = generic_file_splice_read,
863 #ifdef CONFIG_CIFS_POSIX
864 .unlocked_ioctl = cifs_ioctl,
865 #endif /* CONFIG_CIFS_POSIX */
866 .llseek = cifs_llseek,
867 .setlease = cifs_setlease,
870 const struct file_operations cifs_file_nobrl_ops = {
871 .read = do_sync_read,
872 .write = do_sync_write,
873 .aio_read = generic_file_aio_read,
874 .aio_write = cifs_file_aio_write,
876 .release = cifs_close,
879 .mmap = cifs_file_mmap,
880 .splice_read = generic_file_splice_read,
881 .llseek = cifs_llseek,
882 #ifdef CONFIG_CIFS_POSIX
883 .unlocked_ioctl = cifs_ioctl,
884 #endif /* CONFIG_CIFS_POSIX */
885 .setlease = cifs_setlease,
888 const struct file_operations cifs_file_strict_nobrl_ops = {
889 .read = do_sync_read,
890 .write = do_sync_write,
891 .aio_read = cifs_strict_readv,
892 .aio_write = cifs_strict_writev,
894 .release = cifs_close,
895 .fsync = cifs_strict_fsync,
897 .mmap = cifs_file_strict_mmap,
898 .splice_read = generic_file_splice_read,
899 .llseek = cifs_llseek,
900 #ifdef CONFIG_CIFS_POSIX
901 .unlocked_ioctl = cifs_ioctl,
902 #endif /* CONFIG_CIFS_POSIX */
903 .setlease = cifs_setlease,
906 const struct file_operations cifs_file_direct_nobrl_ops = {
907 /* BB reevaluate whether they can be done with directio, no cache */
908 .read = do_sync_read,
909 .write = do_sync_write,
910 .aio_read = cifs_user_readv,
911 .aio_write = cifs_user_writev,
913 .release = cifs_close,
916 .mmap = cifs_file_mmap,
917 .splice_read = generic_file_splice_read,
918 #ifdef CONFIG_CIFS_POSIX
919 .unlocked_ioctl = cifs_ioctl,
920 #endif /* CONFIG_CIFS_POSIX */
921 .llseek = cifs_llseek,
922 .setlease = cifs_setlease,
925 const struct file_operations cifs_dir_ops = {
926 .readdir = cifs_readdir,
927 .release = cifs_closedir,
928 .read = generic_read_dir,
929 .unlocked_ioctl = cifs_ioctl,
930 .llseek = generic_file_llseek,
934 cifs_init_once(void *inode)
936 struct cifsInodeInfo *cifsi = inode;
938 inode_init_once(&cifsi->vfs_inode);
939 INIT_LIST_HEAD(&cifsi->lockList);
943 cifs_init_inodecache(void)
945 cifs_inode_cachep = kmem_cache_create("cifs_inode_cache",
946 sizeof(struct cifsInodeInfo),
947 0, (SLAB_RECLAIM_ACCOUNT|
950 if (cifs_inode_cachep == NULL)
957 cifs_destroy_inodecache(void)
959 kmem_cache_destroy(cifs_inode_cachep);
963 cifs_init_request_bufs(void)
965 if (CIFSMaxBufSize < 8192) {
966 /* Buffer size can not be smaller than 2 * PATH_MAX since maximum
967 Unicode path name has to fit in any SMB/CIFS path based frames */
968 CIFSMaxBufSize = 8192;
969 } else if (CIFSMaxBufSize > 1024*127) {
970 CIFSMaxBufSize = 1024 * 127;
972 CIFSMaxBufSize &= 0x1FE00; /* Round size to even 512 byte mult*/
974 /* cERROR(1, "CIFSMaxBufSize %d 0x%x",CIFSMaxBufSize,CIFSMaxBufSize); */
975 cifs_req_cachep = kmem_cache_create("cifs_request",
977 MAX_CIFS_HDR_SIZE, 0,
978 SLAB_HWCACHE_ALIGN, NULL);
979 if (cifs_req_cachep == NULL)
982 if (cifs_min_rcv < 1)
984 else if (cifs_min_rcv > 64) {
986 cERROR(1, "cifs_min_rcv set to maximum (64)");
989 cifs_req_poolp = mempool_create_slab_pool(cifs_min_rcv,
992 if (cifs_req_poolp == NULL) {
993 kmem_cache_destroy(cifs_req_cachep);
996 /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and
997 almost all handle based requests (but not write response, nor is it
998 sufficient for path based requests). A smaller size would have
999 been more efficient (compacting multiple slab items on one 4k page)
1000 for the case in which debug was on, but this larger size allows
1001 more SMBs to use small buffer alloc and is still much more
1002 efficient to alloc 1 per page off the slab compared to 17K (5page)
1003 alloc of large cifs buffers even when page debugging is on */
1004 cifs_sm_req_cachep = kmem_cache_create("cifs_small_rq",
1005 MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN,
1007 if (cifs_sm_req_cachep == NULL) {
1008 mempool_destroy(cifs_req_poolp);
1009 kmem_cache_destroy(cifs_req_cachep);
1013 if (cifs_min_small < 2)
1015 else if (cifs_min_small > 256) {
1016 cifs_min_small = 256;
1017 cFYI(1, "cifs_min_small set to maximum (256)");
1020 cifs_sm_req_poolp = mempool_create_slab_pool(cifs_min_small,
1021 cifs_sm_req_cachep);
1023 if (cifs_sm_req_poolp == NULL) {
1024 mempool_destroy(cifs_req_poolp);
1025 kmem_cache_destroy(cifs_req_cachep);
1026 kmem_cache_destroy(cifs_sm_req_cachep);
1034 cifs_destroy_request_bufs(void)
1036 mempool_destroy(cifs_req_poolp);
1037 kmem_cache_destroy(cifs_req_cachep);
1038 mempool_destroy(cifs_sm_req_poolp);
1039 kmem_cache_destroy(cifs_sm_req_cachep);
1043 cifs_init_mids(void)
1045 cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids",
1046 sizeof(struct mid_q_entry), 0,
1047 SLAB_HWCACHE_ALIGN, NULL);
1048 if (cifs_mid_cachep == NULL)
1051 /* 3 is a reasonable minimum number of simultaneous operations */
1052 cifs_mid_poolp = mempool_create_slab_pool(3, cifs_mid_cachep);
1053 if (cifs_mid_poolp == NULL) {
1054 kmem_cache_destroy(cifs_mid_cachep);
1062 cifs_destroy_mids(void)
1064 mempool_destroy(cifs_mid_poolp);
1065 kmem_cache_destroy(cifs_mid_cachep);
1073 INIT_LIST_HEAD(&cifs_tcp_ses_list);
1074 #ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
1075 INIT_LIST_HEAD(&GlobalDnotifyReqList);
1076 INIT_LIST_HEAD(&GlobalDnotifyRsp_Q);
1077 #endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
1079 * Initialize Global counters
1081 atomic_set(&sesInfoAllocCount, 0);
1082 atomic_set(&tconInfoAllocCount, 0);
1083 atomic_set(&tcpSesAllocCount, 0);
1084 atomic_set(&tcpSesReconnectCount, 0);
1085 atomic_set(&tconInfoReconnectCount, 0);
1087 atomic_set(&bufAllocCount, 0);
1088 atomic_set(&smBufAllocCount, 0);
1089 #ifdef CONFIG_CIFS_STATS2
1090 atomic_set(&totBufAllocCount, 0);
1091 atomic_set(&totSmBufAllocCount, 0);
1092 #endif /* CONFIG_CIFS_STATS2 */
1094 atomic_set(&midCount, 0);
1095 GlobalCurrentXid = 0;
1096 GlobalTotalActiveXid = 0;
1097 GlobalMaxActiveXid = 0;
1098 spin_lock_init(&cifs_tcp_ses_lock);
1099 spin_lock_init(&cifs_file_list_lock);
1100 spin_lock_init(&GlobalMid_Lock);
1102 if (cifs_max_pending < 2) {
1103 cifs_max_pending = 2;
1104 cFYI(1, "cifs_max_pending set to min of 2");
1105 } else if (cifs_max_pending > 256) {
1106 cifs_max_pending = 256;
1107 cFYI(1, "cifs_max_pending set to max of 256");
1110 rc = cifs_fscache_register();
1112 goto out_clean_proc;
1114 rc = cifs_init_inodecache();
1116 goto out_unreg_fscache;
1118 rc = cifs_init_mids();
1120 goto out_destroy_inodecache;
1122 rc = cifs_init_request_bufs();
1124 goto out_destroy_mids;
1126 #ifdef CONFIG_CIFS_UPCALL
1127 rc = register_key_type(&cifs_spnego_key_type);
1129 goto out_destroy_request_bufs;
1130 #endif /* CONFIG_CIFS_UPCALL */
1132 #ifdef CONFIG_CIFS_ACL
1133 rc = init_cifs_idmap();
1135 goto out_register_key_type;
1136 #endif /* CONFIG_CIFS_ACL */
1138 rc = register_filesystem(&cifs_fs_type);
1140 goto out_init_cifs_idmap;
1144 out_init_cifs_idmap:
1145 #ifdef CONFIG_CIFS_ACL
1147 out_register_key_type:
1149 #ifdef CONFIG_CIFS_UPCALL
1150 unregister_key_type(&cifs_spnego_key_type);
1151 out_destroy_request_bufs:
1153 cifs_destroy_request_bufs();
1155 cifs_destroy_mids();
1156 out_destroy_inodecache:
1157 cifs_destroy_inodecache();
1159 cifs_fscache_unregister();
1168 cFYI(DBG2, "exit_cifs");
1170 cifs_fscache_unregister();
1171 #ifdef CONFIG_CIFS_DFS_UPCALL
1172 cifs_dfs_release_automount_timer();
1174 #ifdef CONFIG_CIFS_ACL
1175 cifs_destroy_idmaptrees();
1178 #ifdef CONFIG_CIFS_UPCALL
1179 unregister_key_type(&cifs_spnego_key_type);
1181 unregister_filesystem(&cifs_fs_type);
1182 cifs_destroy_inodecache();
1183 cifs_destroy_mids();
1184 cifs_destroy_request_bufs();
1187 MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>");
1188 MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */
1190 ("VFS to access servers complying with the SNIA CIFS Specification "
1191 "e.g. Samba and Windows");
1192 MODULE_VERSION(CIFS_VERSION);
1193 module_init(init_cifs)
1194 module_exit(exit_cifs)