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>
41 #define DECLARE_GLOBALS_HERE
43 #include "cifsproto.h"
44 #include "cifs_debug.h"
45 #include "cifs_fs_sb.h"
47 #include <linux/key-type.h>
48 #include "cifs_spnego.h"
50 #define CIFS_MAGIC_NUMBER 0xFF534D42 /* the first four bytes of SMB PDUs */
55 unsigned int oplockEnabled = 1;
56 unsigned int linuxExtEnabled = 1;
57 unsigned int lookupCacheEnabled = 1;
58 unsigned int multiuser_mount = 0;
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, 0);
77 MODULE_PARM_DESC(cifs_max_pending, "Simultaneous requests to server. "
78 "Default: 50 Range: 2 to 256");
79 unsigned short echo_retries = 5;
80 module_param(echo_retries, ushort, 0644);
81 MODULE_PARM_DESC(echo_retries, "Number of echo attempts before giving up and "
82 "reconnecting server. Default: 5. 0 means "
84 extern mempool_t *cifs_sm_req_poolp;
85 extern mempool_t *cifs_req_poolp;
86 extern mempool_t *cifs_mid_poolp;
89 cifs_sb_active(struct super_block *sb)
91 struct cifs_sb_info *server = CIFS_SB(sb);
93 if (atomic_inc_return(&server->active) == 1)
94 atomic_inc(&sb->s_active);
98 cifs_sb_deactive(struct super_block *sb)
100 struct cifs_sb_info *server = CIFS_SB(sb);
102 if (atomic_dec_and_test(&server->active))
103 deactivate_super(sb);
107 cifs_read_super(struct super_block *sb, struct smb_vol *volume_info,
108 const char *devname, int silent)
111 struct cifs_sb_info *cifs_sb;
114 cifs_sb = CIFS_SB(sb);
116 spin_lock_init(&cifs_sb->tlink_tree_lock);
117 cifs_sb->tlink_tree = RB_ROOT;
119 rc = bdi_setup_and_register(&cifs_sb->bdi, "cifs", BDI_CAP_MAP_COPY);
123 cifs_sb->bdi.ra_pages = default_backing_dev_info.ra_pages;
125 rc = cifs_mount(sb, cifs_sb, volume_info, devname);
129 cERROR(1, "cifs_mount failed w/return code = %d", rc);
130 goto out_mount_failed;
133 sb->s_magic = CIFS_MAGIC_NUMBER;
134 sb->s_op = &cifs_super_ops;
135 sb->s_bdi = &cifs_sb->bdi;
136 sb->s_blocksize = CIFS_MAX_MSGSIZE;
137 sb->s_blocksize_bits = 14; /* default 2**14 = CIFS_MAX_MSGSIZE */
138 inode = cifs_root_iget(sb);
146 sb->s_root = d_alloc_root(inode);
153 /* do that *after* d_alloc_root() - we want NULL ->d_op for root here */
154 if (cifs_sb_master_tcon(cifs_sb)->nocase)
155 sb->s_d_op = &cifs_ci_dentry_ops;
157 sb->s_d_op = &cifs_dentry_ops;
159 #ifdef CIFS_NFSD_EXPORT
160 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
161 cFYI(1, "export ops supported");
162 sb->s_export_op = &cifs_export_ops;
164 #endif /* CIFS_NFSD_EXPORT */
169 cERROR(1, "cifs_read_super: get root inode failed");
173 cifs_umount(sb, cifs_sb);
176 bdi_destroy(&cifs_sb->bdi);
181 cifs_put_super(struct super_block *sb)
184 struct cifs_sb_info *cifs_sb;
186 cFYI(1, "In cifs_put_super");
187 cifs_sb = CIFS_SB(sb);
188 if (cifs_sb == NULL) {
189 cFYI(1, "Empty cifs superblock info passed to unmount");
193 rc = cifs_umount(sb, cifs_sb);
195 cERROR(1, "cifs_umount failed with return code %d", rc);
196 if (cifs_sb->mountdata) {
197 kfree(cifs_sb->mountdata);
198 cifs_sb->mountdata = NULL;
201 unload_nls(cifs_sb->local_nls);
202 bdi_destroy(&cifs_sb->bdi);
207 cifs_statfs(struct dentry *dentry, struct kstatfs *buf)
209 struct super_block *sb = dentry->d_sb;
210 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
211 struct cifsTconInfo *tcon = cifs_sb_master_tcon(cifs_sb);
212 int rc = -EOPNOTSUPP;
217 buf->f_type = CIFS_MAGIC_NUMBER;
220 * PATH_MAX may be too long - it would presumably be total path,
221 * but note that some servers (includinng Samba 3) have a shorter
224 * Instead could get the real value via SMB_QUERY_FS_ATTRIBUTE_INFO.
226 buf->f_namelen = PATH_MAX;
227 buf->f_files = 0; /* undefined */
228 buf->f_ffree = 0; /* unlimited */
231 * We could add a second check for a QFS Unix capability bit
233 if ((tcon->ses->capabilities & CAP_UNIX) &&
234 (CIFS_POSIX_EXTENSIONS & le64_to_cpu(tcon->fsUnixInfo.Capability)))
235 rc = CIFSSMBQFSPosixInfo(xid, tcon, buf);
238 * Only need to call the old QFSInfo if failed on newer one,
241 if (rc && (tcon->ses->capabilities & CAP_NT_SMBS))
242 rc = CIFSSMBQFSInfo(xid, tcon, buf);
245 * Some old Windows servers also do not support level 103, retry with
246 * older level one if old server failed the previous call or we
247 * bypassed it because we detected that this was an older LANMAN sess
250 rc = SMBOldQFSInfo(xid, tcon, buf);
256 static int cifs_permission(struct inode *inode, int mask, unsigned int flags)
258 struct cifs_sb_info *cifs_sb;
260 if (flags & IPERM_FLAG_RCU)
263 cifs_sb = CIFS_SB(inode->i_sb);
265 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) {
266 if ((mask & MAY_EXEC) && !execute_ok(inode))
270 } else /* file mode might have been restricted at mount time
271 on the client (above and beyond ACL on servers) for
272 servers which do not support setting and viewing mode bits,
273 so allowing client to check permissions is useful */
274 return generic_permission(inode, mask, flags, NULL);
277 static struct kmem_cache *cifs_inode_cachep;
278 static struct kmem_cache *cifs_req_cachep;
279 static struct kmem_cache *cifs_mid_cachep;
280 static struct kmem_cache *cifs_sm_req_cachep;
281 mempool_t *cifs_sm_req_poolp;
282 mempool_t *cifs_req_poolp;
283 mempool_t *cifs_mid_poolp;
285 static struct inode *
286 cifs_alloc_inode(struct super_block *sb)
288 struct cifsInodeInfo *cifs_inode;
289 cifs_inode = kmem_cache_alloc(cifs_inode_cachep, GFP_KERNEL);
292 cifs_inode->cifsAttrs = 0x20; /* default */
293 cifs_inode->time = 0;
294 /* Until the file is open and we have gotten oplock
295 info back from the server, can not assume caching of
296 file data or metadata */
297 cifs_set_oplock_level(cifs_inode, 0);
298 cifs_inode->delete_pending = false;
299 cifs_inode->invalid_mapping = false;
300 cifs_inode->vfs_inode.i_blkbits = 14; /* 2**14 = CIFS_MAX_MSGSIZE */
301 cifs_inode->server_eof = 0;
302 cifs_inode->uniqueid = 0;
303 cifs_inode->createtime = 0;
305 /* Can not set i_flags here - they get immediately overwritten
306 to zero by the VFS */
307 /* cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME;*/
308 INIT_LIST_HEAD(&cifs_inode->openFileList);
309 return &cifs_inode->vfs_inode;
312 static void cifs_i_callback(struct rcu_head *head)
314 struct inode *inode = container_of(head, struct inode, i_rcu);
315 INIT_LIST_HEAD(&inode->i_dentry);
316 kmem_cache_free(cifs_inode_cachep, CIFS_I(inode));
320 cifs_destroy_inode(struct inode *inode)
322 call_rcu(&inode->i_rcu, cifs_i_callback);
326 cifs_evict_inode(struct inode *inode)
328 truncate_inode_pages(&inode->i_data, 0);
329 end_writeback(inode);
330 cifs_fscache_release_inode_cookie(inode);
334 cifs_show_address(struct seq_file *s, struct TCP_Server_Info *server)
336 struct sockaddr_in *sa = (struct sockaddr_in *) &server->dstaddr;
337 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *) &server->dstaddr;
339 seq_printf(s, ",addr=");
341 switch (server->dstaddr.ss_family) {
343 seq_printf(s, "%pI4", &sa->sin_addr.s_addr);
346 seq_printf(s, "%pI6", &sa6->sin6_addr.s6_addr);
347 if (sa6->sin6_scope_id)
348 seq_printf(s, "%%%u", sa6->sin6_scope_id);
351 seq_printf(s, "(unknown)");
356 * cifs_show_options() is for displaying mount options in /proc/mounts.
357 * Not all settable options are displayed but most of the important
361 cifs_show_options(struct seq_file *s, struct vfsmount *m)
363 struct cifs_sb_info *cifs_sb = CIFS_SB(m->mnt_sb);
364 struct cifsTconInfo *tcon = cifs_sb_master_tcon(cifs_sb);
365 struct sockaddr *srcaddr;
366 srcaddr = (struct sockaddr *)&tcon->ses->server->srcaddr;
368 seq_printf(s, ",unc=%s", tcon->treeName);
370 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER)
371 seq_printf(s, ",multiuser");
372 else if (tcon->ses->user_name)
373 seq_printf(s, ",username=%s", tcon->ses->user_name);
375 if (tcon->ses->domainName)
376 seq_printf(s, ",domain=%s", tcon->ses->domainName);
378 if (srcaddr->sa_family != AF_UNSPEC) {
379 struct sockaddr_in *saddr4;
380 struct sockaddr_in6 *saddr6;
381 saddr4 = (struct sockaddr_in *)srcaddr;
382 saddr6 = (struct sockaddr_in6 *)srcaddr;
383 if (srcaddr->sa_family == AF_INET6)
384 seq_printf(s, ",srcaddr=%pI6c",
386 else if (srcaddr->sa_family == AF_INET)
387 seq_printf(s, ",srcaddr=%pI4",
388 &saddr4->sin_addr.s_addr);
390 seq_printf(s, ",srcaddr=BAD-AF:%i",
391 (int)(srcaddr->sa_family));
394 seq_printf(s, ",uid=%d", cifs_sb->mnt_uid);
395 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)
396 seq_printf(s, ",forceuid");
398 seq_printf(s, ",noforceuid");
400 seq_printf(s, ",gid=%d", cifs_sb->mnt_gid);
401 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)
402 seq_printf(s, ",forcegid");
404 seq_printf(s, ",noforcegid");
406 cifs_show_address(s, tcon->ses->server);
409 seq_printf(s, ",file_mode=0%o,dir_mode=0%o",
410 cifs_sb->mnt_file_mode,
411 cifs_sb->mnt_dir_mode);
413 seq_printf(s, ",seal");
415 seq_printf(s, ",nocase");
417 seq_printf(s, ",hard");
418 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
419 seq_printf(s, ",posixpaths");
420 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)
421 seq_printf(s, ",setuids");
422 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
423 seq_printf(s, ",serverino");
424 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO)
425 seq_printf(s, ",directio");
426 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
427 seq_printf(s, ",nouser_xattr");
428 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR)
429 seq_printf(s, ",mapchars");
430 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)
431 seq_printf(s, ",sfu");
432 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
433 seq_printf(s, ",nobrl");
434 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
435 seq_printf(s, ",cifsacl");
436 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)
437 seq_printf(s, ",dynperm");
438 if (m->mnt_sb->s_flags & MS_POSIXACL)
439 seq_printf(s, ",acl");
440 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS)
441 seq_printf(s, ",mfsymlinks");
442 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_FSCACHE)
443 seq_printf(s, ",fsc");
445 seq_printf(s, ",rsize=%d", cifs_sb->rsize);
446 seq_printf(s, ",wsize=%d", cifs_sb->wsize);
447 /* convert actimeo and display it in seconds */
448 seq_printf(s, ",actimeo=%lu", cifs_sb->actimeo / HZ);
453 static void cifs_umount_begin(struct super_block *sb)
455 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
456 struct cifsTconInfo *tcon;
461 tcon = cifs_sb_master_tcon(cifs_sb);
463 spin_lock(&cifs_tcp_ses_lock);
464 if ((tcon->tc_count > 1) || (tcon->tidStatus == CifsExiting)) {
465 /* we have other mounts to same share or we have
466 already tried to force umount this and woken up
467 all waiting network requests, nothing to do */
468 spin_unlock(&cifs_tcp_ses_lock);
470 } else if (tcon->tc_count == 1)
471 tcon->tidStatus = CifsExiting;
472 spin_unlock(&cifs_tcp_ses_lock);
474 /* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */
475 /* cancel_notify_requests(tcon); */
476 if (tcon->ses && tcon->ses->server) {
477 cFYI(1, "wake up tasks now - umount begin not complete");
478 wake_up_all(&tcon->ses->server->request_q);
479 wake_up_all(&tcon->ses->server->response_q);
480 msleep(1); /* yield */
481 /* we have to kick the requests once more */
482 wake_up_all(&tcon->ses->server->response_q);
489 #ifdef CONFIG_CIFS_STATS2
490 static int cifs_show_stats(struct seq_file *s, struct vfsmount *mnt)
497 static int cifs_remount(struct super_block *sb, int *flags, char *data)
499 *flags |= MS_NODIRATIME;
503 static int cifs_drop_inode(struct inode *inode)
505 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
507 /* no serverino => unconditional eviction */
508 return !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) ||
509 generic_drop_inode(inode);
512 static const struct super_operations cifs_super_ops = {
513 .put_super = cifs_put_super,
514 .statfs = cifs_statfs,
515 .alloc_inode = cifs_alloc_inode,
516 .destroy_inode = cifs_destroy_inode,
517 .drop_inode = cifs_drop_inode,
518 .evict_inode = cifs_evict_inode,
519 /* .delete_inode = cifs_delete_inode, */ /* Do not need above
520 function unless later we add lazy close of inodes or unless the
521 kernel forgets to call us with the same number of releases (closes)
523 .show_options = cifs_show_options,
524 .umount_begin = cifs_umount_begin,
525 .remount_fs = cifs_remount,
526 #ifdef CONFIG_CIFS_STATS2
527 .show_stats = cifs_show_stats,
532 * Get root dentry from superblock according to prefix path mount option.
533 * Return dentry with refcount + 1 on success and NULL otherwise.
535 static struct dentry *
536 cifs_get_root(struct smb_vol *vol, struct super_block *sb)
541 struct dentry *dparent = NULL, *dchild = NULL, *alias;
542 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
543 unsigned int i, full_len, len;
544 char *full_path = NULL, *pstart;
547 full_path = cifs_build_path_to_root(vol, cifs_sb,
548 cifs_sb_master_tcon(cifs_sb));
549 if (full_path == NULL)
552 cFYI(1, "Get root dentry for %s", full_path);
555 sep = CIFS_DIR_SEP(cifs_sb);
556 dparent = dget(sb->s_root);
557 full_len = strlen(full_path);
558 full_path[full_len] = sep;
559 pstart = full_path + 1;
561 for (i = 1, len = 0; i <= full_len; i++) {
562 if (full_path[i] != sep || !len) {
568 cFYI(1, "get dentry for %s", pstart);
572 name.hash = full_name_hash(pstart, len);
573 dchild = d_lookup(dparent, &name);
574 if (dchild == NULL) {
575 cFYI(1, "not exists");
576 dchild = d_alloc(dparent, &name);
577 if (dchild == NULL) {
584 cFYI(1, "get inode");
585 if (dchild->d_inode == NULL) {
586 cFYI(1, "not exists");
588 if (cifs_sb_master_tcon(CIFS_SB(sb))->unix_ext)
589 rc = cifs_get_inode_info_unix(&inode, full_path,
592 rc = cifs_get_inode_info(&inode, full_path,
593 NULL, sb, xid, NULL);
600 alias = d_materialise_unique(dchild, inode);
611 cFYI(1, "parent %p, child %p", dparent, dchild);
616 pstart = full_path + i + 1;
625 static struct dentry *
626 cifs_do_mount(struct file_system_type *fs_type,
627 int flags, const char *dev_name, void *data)
630 struct super_block *sb;
631 struct cifs_sb_info *cifs_sb;
632 struct smb_vol *volume_info;
635 cFYI(1, "Devname: %s flags: %d ", dev_name, flags);
637 rc = cifs_setup_volume_info(&volume_info, (char *)data, dev_name);
641 cifs_sb = kzalloc(sizeof(struct cifs_sb_info), GFP_KERNEL);
642 if (cifs_sb == NULL) {
643 root = ERR_PTR(-ENOMEM);
647 cifs_setup_cifs_sb(volume_info, cifs_sb);
649 sb = sget(fs_type, NULL, set_anon_super, NULL);
656 * Copy mount params for use in submounts. Better to do
657 * the copy here and deal with the error before cleanup gets
658 * complicated post-mount.
660 cifs_sb->mountdata = kstrndup(data, PAGE_SIZE, GFP_KERNEL);
661 if (cifs_sb->mountdata == NULL) {
662 root = ERR_PTR(-ENOMEM);
667 /* BB should we make this contingent on mount parm? */
668 sb->s_flags |= MS_NODIRATIME | MS_NOATIME;
669 sb->s_fs_info = cifs_sb;
671 rc = cifs_read_super(sb, volume_info, dev_name,
672 flags & MS_SILENT ? 1 : 0);
678 sb->s_flags |= MS_ACTIVE;
680 root = cifs_get_root(volume_info, sb);
683 cFYI(1, "dentry root is: %p", root);
687 kfree(cifs_sb->mountdata);
688 deactivate_locked_super(sb);
691 unload_nls(cifs_sb->local_nls);
695 cifs_cleanup_volume_info(&volume_info);
699 static ssize_t cifs_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
700 unsigned long nr_segs, loff_t pos)
702 struct inode *inode = iocb->ki_filp->f_path.dentry->d_inode;
706 written = generic_file_aio_write(iocb, iov, nr_segs, pos);
708 if (CIFS_I(inode)->clientCanCacheAll)
711 rc = filemap_fdatawrite(inode->i_mapping);
713 cFYI(1, "cifs_file_aio_write: %d rc on %p inode", rc, inode);
718 static loff_t cifs_llseek(struct file *file, loff_t offset, int origin)
720 /* origin == SEEK_END => we must revalidate the cached file length */
721 if (origin == SEEK_END) {
723 struct inode *inode = file->f_path.dentry->d_inode;
726 * We need to be sure that all dirty pages are written and the
727 * server has the newest file length.
729 if (!CIFS_I(inode)->clientCanCacheRead && inode->i_mapping &&
730 inode->i_mapping->nrpages != 0) {
731 rc = filemap_fdatawait(inode->i_mapping);
733 mapping_set_error(inode->i_mapping, rc);
738 * Some applications poll for the file length in this strange
739 * way so we must seek to end on non-oplocked files by
740 * setting the revalidate time to zero.
742 CIFS_I(inode)->time = 0;
744 rc = cifs_revalidate_file_attr(file);
748 return generic_file_llseek_unlocked(file, offset, origin);
751 static int cifs_setlease(struct file *file, long arg, struct file_lock **lease)
753 /* note that this is called by vfs setlease with lock_flocks held
754 to protect *lease from going away */
755 struct inode *inode = file->f_path.dentry->d_inode;
756 struct cifsFileInfo *cfile = file->private_data;
758 if (!(S_ISREG(inode->i_mode)))
761 /* check if file is oplocked */
762 if (((arg == F_RDLCK) &&
763 (CIFS_I(inode)->clientCanCacheRead)) ||
765 (CIFS_I(inode)->clientCanCacheAll)))
766 return generic_setlease(file, arg, lease);
767 else if (tlink_tcon(cfile->tlink)->local_lease &&
768 !CIFS_I(inode)->clientCanCacheRead)
769 /* If the server claims to support oplock on this
770 file, then we still need to check oplock even
771 if the local_lease mount option is set, but there
772 are servers which do not support oplock for which
773 this mount option may be useful if the user
774 knows that the file won't be changed on the server
776 return generic_setlease(file, arg, lease);
781 struct file_system_type cifs_fs_type = {
782 .owner = THIS_MODULE,
784 .mount = cifs_do_mount,
785 .kill_sb = kill_anon_super,
788 const struct inode_operations cifs_dir_inode_ops = {
789 .create = cifs_create,
790 .lookup = cifs_lookup,
791 .getattr = cifs_getattr,
792 .unlink = cifs_unlink,
793 .link = cifs_hardlink,
796 .rename = cifs_rename,
797 .permission = cifs_permission,
798 /* revalidate:cifs_revalidate, */
799 .setattr = cifs_setattr,
800 .symlink = cifs_symlink,
802 #ifdef CONFIG_CIFS_XATTR
803 .setxattr = cifs_setxattr,
804 .getxattr = cifs_getxattr,
805 .listxattr = cifs_listxattr,
806 .removexattr = cifs_removexattr,
810 const struct inode_operations cifs_file_inode_ops = {
811 /* revalidate:cifs_revalidate, */
812 .setattr = cifs_setattr,
813 .getattr = cifs_getattr, /* do we need this anymore? */
814 .rename = cifs_rename,
815 .permission = cifs_permission,
816 #ifdef CONFIG_CIFS_XATTR
817 .setxattr = cifs_setxattr,
818 .getxattr = cifs_getxattr,
819 .listxattr = cifs_listxattr,
820 .removexattr = cifs_removexattr,
824 const struct inode_operations cifs_symlink_inode_ops = {
825 .readlink = generic_readlink,
826 .follow_link = cifs_follow_link,
827 .put_link = cifs_put_link,
828 .permission = cifs_permission,
829 /* BB add the following two eventually */
830 /* revalidate: cifs_revalidate,
831 setattr: cifs_notify_change, *//* BB do we need notify change */
832 #ifdef CONFIG_CIFS_XATTR
833 .setxattr = cifs_setxattr,
834 .getxattr = cifs_getxattr,
835 .listxattr = cifs_listxattr,
836 .removexattr = cifs_removexattr,
840 const struct file_operations cifs_file_ops = {
841 .read = do_sync_read,
842 .write = do_sync_write,
843 .aio_read = generic_file_aio_read,
844 .aio_write = cifs_file_aio_write,
846 .release = cifs_close,
850 .mmap = cifs_file_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_strict_ops = {
860 .read = do_sync_read,
861 .write = do_sync_write,
862 .aio_read = cifs_strict_readv,
863 .aio_write = cifs_strict_writev,
865 .release = cifs_close,
867 .fsync = cifs_strict_fsync,
869 .mmap = cifs_file_strict_mmap,
870 .splice_read = generic_file_splice_read,
871 .llseek = cifs_llseek,
872 #ifdef CONFIG_CIFS_POSIX
873 .unlocked_ioctl = cifs_ioctl,
874 #endif /* CONFIG_CIFS_POSIX */
875 .setlease = cifs_setlease,
878 const struct file_operations cifs_file_direct_ops = {
879 /* BB reevaluate whether they can be done with directio, no cache */
880 .read = do_sync_read,
881 .write = do_sync_write,
882 .aio_read = cifs_user_readv,
883 .aio_write = cifs_user_writev,
885 .release = cifs_close,
889 .mmap = cifs_file_mmap,
890 .splice_read = generic_file_splice_read,
891 #ifdef CONFIG_CIFS_POSIX
892 .unlocked_ioctl = cifs_ioctl,
893 #endif /* CONFIG_CIFS_POSIX */
894 .llseek = cifs_llseek,
895 .setlease = cifs_setlease,
898 const struct file_operations cifs_file_nobrl_ops = {
899 .read = do_sync_read,
900 .write = do_sync_write,
901 .aio_read = generic_file_aio_read,
902 .aio_write = cifs_file_aio_write,
904 .release = cifs_close,
907 .mmap = cifs_file_mmap,
908 .splice_read = generic_file_splice_read,
909 .llseek = cifs_llseek,
910 #ifdef CONFIG_CIFS_POSIX
911 .unlocked_ioctl = cifs_ioctl,
912 #endif /* CONFIG_CIFS_POSIX */
913 .setlease = cifs_setlease,
916 const struct file_operations cifs_file_strict_nobrl_ops = {
917 .read = do_sync_read,
918 .write = do_sync_write,
919 .aio_read = cifs_strict_readv,
920 .aio_write = cifs_strict_writev,
922 .release = cifs_close,
923 .fsync = cifs_strict_fsync,
925 .mmap = cifs_file_strict_mmap,
926 .splice_read = generic_file_splice_read,
927 .llseek = cifs_llseek,
928 #ifdef CONFIG_CIFS_POSIX
929 .unlocked_ioctl = cifs_ioctl,
930 #endif /* CONFIG_CIFS_POSIX */
931 .setlease = cifs_setlease,
934 const struct file_operations cifs_file_direct_nobrl_ops = {
935 /* BB reevaluate whether they can be done with directio, no cache */
936 .read = do_sync_read,
937 .write = do_sync_write,
938 .aio_read = cifs_user_readv,
939 .aio_write = cifs_user_writev,
941 .release = cifs_close,
944 .mmap = cifs_file_mmap,
945 .splice_read = generic_file_splice_read,
946 #ifdef CONFIG_CIFS_POSIX
947 .unlocked_ioctl = cifs_ioctl,
948 #endif /* CONFIG_CIFS_POSIX */
949 .llseek = cifs_llseek,
950 .setlease = cifs_setlease,
953 const struct file_operations cifs_dir_ops = {
954 .readdir = cifs_readdir,
955 .release = cifs_closedir,
956 .read = generic_read_dir,
957 .unlocked_ioctl = cifs_ioctl,
958 .llseek = generic_file_llseek,
962 cifs_init_once(void *inode)
964 struct cifsInodeInfo *cifsi = inode;
966 inode_init_once(&cifsi->vfs_inode);
967 INIT_LIST_HEAD(&cifsi->lockList);
971 cifs_init_inodecache(void)
973 cifs_inode_cachep = kmem_cache_create("cifs_inode_cache",
974 sizeof(struct cifsInodeInfo),
975 0, (SLAB_RECLAIM_ACCOUNT|
978 if (cifs_inode_cachep == NULL)
985 cifs_destroy_inodecache(void)
987 kmem_cache_destroy(cifs_inode_cachep);
991 cifs_init_request_bufs(void)
993 if (CIFSMaxBufSize < 8192) {
994 /* Buffer size can not be smaller than 2 * PATH_MAX since maximum
995 Unicode path name has to fit in any SMB/CIFS path based frames */
996 CIFSMaxBufSize = 8192;
997 } else if (CIFSMaxBufSize > 1024*127) {
998 CIFSMaxBufSize = 1024 * 127;
1000 CIFSMaxBufSize &= 0x1FE00; /* Round size to even 512 byte mult*/
1002 /* cERROR(1, "CIFSMaxBufSize %d 0x%x",CIFSMaxBufSize,CIFSMaxBufSize); */
1003 cifs_req_cachep = kmem_cache_create("cifs_request",
1005 MAX_CIFS_HDR_SIZE, 0,
1006 SLAB_HWCACHE_ALIGN, NULL);
1007 if (cifs_req_cachep == NULL)
1010 if (cifs_min_rcv < 1)
1012 else if (cifs_min_rcv > 64) {
1014 cERROR(1, "cifs_min_rcv set to maximum (64)");
1017 cifs_req_poolp = mempool_create_slab_pool(cifs_min_rcv,
1020 if (cifs_req_poolp == NULL) {
1021 kmem_cache_destroy(cifs_req_cachep);
1024 /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and
1025 almost all handle based requests (but not write response, nor is it
1026 sufficient for path based requests). A smaller size would have
1027 been more efficient (compacting multiple slab items on one 4k page)
1028 for the case in which debug was on, but this larger size allows
1029 more SMBs to use small buffer alloc and is still much more
1030 efficient to alloc 1 per page off the slab compared to 17K (5page)
1031 alloc of large cifs buffers even when page debugging is on */
1032 cifs_sm_req_cachep = kmem_cache_create("cifs_small_rq",
1033 MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN,
1035 if (cifs_sm_req_cachep == NULL) {
1036 mempool_destroy(cifs_req_poolp);
1037 kmem_cache_destroy(cifs_req_cachep);
1041 if (cifs_min_small < 2)
1043 else if (cifs_min_small > 256) {
1044 cifs_min_small = 256;
1045 cFYI(1, "cifs_min_small set to maximum (256)");
1048 cifs_sm_req_poolp = mempool_create_slab_pool(cifs_min_small,
1049 cifs_sm_req_cachep);
1051 if (cifs_sm_req_poolp == NULL) {
1052 mempool_destroy(cifs_req_poolp);
1053 kmem_cache_destroy(cifs_req_cachep);
1054 kmem_cache_destroy(cifs_sm_req_cachep);
1062 cifs_destroy_request_bufs(void)
1064 mempool_destroy(cifs_req_poolp);
1065 kmem_cache_destroy(cifs_req_cachep);
1066 mempool_destroy(cifs_sm_req_poolp);
1067 kmem_cache_destroy(cifs_sm_req_cachep);
1071 cifs_init_mids(void)
1073 cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids",
1074 sizeof(struct mid_q_entry), 0,
1075 SLAB_HWCACHE_ALIGN, NULL);
1076 if (cifs_mid_cachep == NULL)
1079 /* 3 is a reasonable minimum number of simultaneous operations */
1080 cifs_mid_poolp = mempool_create_slab_pool(3, cifs_mid_cachep);
1081 if (cifs_mid_poolp == NULL) {
1082 kmem_cache_destroy(cifs_mid_cachep);
1090 cifs_destroy_mids(void)
1092 mempool_destroy(cifs_mid_poolp);
1093 kmem_cache_destroy(cifs_mid_cachep);
1101 INIT_LIST_HEAD(&cifs_tcp_ses_list);
1102 #ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
1103 INIT_LIST_HEAD(&GlobalDnotifyReqList);
1104 INIT_LIST_HEAD(&GlobalDnotifyRsp_Q);
1105 #endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
1107 * Initialize Global counters
1109 atomic_set(&sesInfoAllocCount, 0);
1110 atomic_set(&tconInfoAllocCount, 0);
1111 atomic_set(&tcpSesAllocCount, 0);
1112 atomic_set(&tcpSesReconnectCount, 0);
1113 atomic_set(&tconInfoReconnectCount, 0);
1115 atomic_set(&bufAllocCount, 0);
1116 atomic_set(&smBufAllocCount, 0);
1117 #ifdef CONFIG_CIFS_STATS2
1118 atomic_set(&totBufAllocCount, 0);
1119 atomic_set(&totSmBufAllocCount, 0);
1120 #endif /* CONFIG_CIFS_STATS2 */
1122 atomic_set(&midCount, 0);
1123 GlobalCurrentXid = 0;
1124 GlobalTotalActiveXid = 0;
1125 GlobalMaxActiveXid = 0;
1126 spin_lock_init(&cifs_tcp_ses_lock);
1127 spin_lock_init(&cifs_file_list_lock);
1128 spin_lock_init(&GlobalMid_Lock);
1130 if (cifs_max_pending < 2) {
1131 cifs_max_pending = 2;
1132 cFYI(1, "cifs_max_pending set to min of 2");
1133 } else if (cifs_max_pending > 256) {
1134 cifs_max_pending = 256;
1135 cFYI(1, "cifs_max_pending set to max of 256");
1138 rc = cifs_fscache_register();
1140 goto out_clean_proc;
1142 rc = cifs_init_inodecache();
1144 goto out_unreg_fscache;
1146 rc = cifs_init_mids();
1148 goto out_destroy_inodecache;
1150 rc = cifs_init_request_bufs();
1152 goto out_destroy_mids;
1154 #ifdef CONFIG_CIFS_UPCALL
1155 rc = register_key_type(&cifs_spnego_key_type);
1157 goto out_destroy_request_bufs;
1158 #endif /* CONFIG_CIFS_UPCALL */
1160 #ifdef CONFIG_CIFS_ACL
1161 rc = init_cifs_idmap();
1163 goto out_register_key_type;
1164 #endif /* CONFIG_CIFS_ACL */
1166 rc = register_filesystem(&cifs_fs_type);
1168 goto out_init_cifs_idmap;
1172 out_init_cifs_idmap:
1173 #ifdef CONFIG_CIFS_ACL
1175 out_register_key_type:
1177 #ifdef CONFIG_CIFS_UPCALL
1178 unregister_key_type(&cifs_spnego_key_type);
1179 out_destroy_request_bufs:
1181 cifs_destroy_request_bufs();
1183 cifs_destroy_mids();
1184 out_destroy_inodecache:
1185 cifs_destroy_inodecache();
1187 cifs_fscache_unregister();
1196 cFYI(DBG2, "exit_cifs");
1198 cifs_fscache_unregister();
1199 #ifdef CONFIG_CIFS_DFS_UPCALL
1200 cifs_dfs_release_automount_timer();
1202 #ifdef CONFIG_CIFS_ACL
1203 cifs_destroy_idmaptrees();
1206 #ifdef CONFIG_CIFS_UPCALL
1207 unregister_key_type(&cifs_spnego_key_type);
1209 unregister_filesystem(&cifs_fs_type);
1210 cifs_destroy_inodecache();
1211 cifs_destroy_mids();
1212 cifs_destroy_request_bufs();
1215 MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>");
1216 MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */
1218 ("VFS to access servers complying with the SNIA CIFS Specification "
1219 "e.g. Samba and Windows");
1220 MODULE_VERSION(CIFS_VERSION);
1221 module_init(init_cifs)
1222 module_exit(exit_cifs)