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)
110 struct cifs_sb_info *cifs_sb;
113 cifs_sb = CIFS_SB(sb);
115 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIXACL)
116 sb->s_flags |= MS_POSIXACL;
118 if (cifs_sb_master_tcon(cifs_sb)->ses->capabilities & CAP_LARGE_FILES)
119 sb->s_maxbytes = MAX_LFS_FILESIZE;
121 sb->s_maxbytes = MAX_NON_LFS;
123 /* BB FIXME fix time_gran to be larger for LANMAN sessions */
124 sb->s_time_gran = 100;
126 sb->s_magic = CIFS_MAGIC_NUMBER;
127 sb->s_op = &cifs_super_ops;
128 sb->s_bdi = &cifs_sb->bdi;
129 sb->s_blocksize = CIFS_MAX_MSGSIZE;
130 sb->s_blocksize_bits = 14; /* default 2**14 = CIFS_MAX_MSGSIZE */
131 inode = cifs_root_iget(sb);
139 sb->s_root = d_alloc_root(inode);
146 /* do that *after* d_alloc_root() - we want NULL ->d_op for root here */
147 if (cifs_sb_master_tcon(cifs_sb)->nocase)
148 sb->s_d_op = &cifs_ci_dentry_ops;
150 sb->s_d_op = &cifs_dentry_ops;
152 #ifdef CIFS_NFSD_EXPORT
153 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
154 cFYI(1, "export ops supported");
155 sb->s_export_op = &cifs_export_ops;
157 #endif /* CIFS_NFSD_EXPORT */
162 cERROR(1, "cifs_read_super: get root inode failed");
166 cifs_umount(cifs_sb);
171 cifs_put_super(struct super_block *sb)
174 struct cifs_sb_info *cifs_sb;
176 cFYI(1, "In cifs_put_super");
177 cifs_sb = CIFS_SB(sb);
178 if (cifs_sb == NULL) {
179 cFYI(1, "Empty cifs superblock info passed to unmount");
183 cifs_umount(cifs_sb);
186 static void cifs_kill_sb(struct super_block *sb)
188 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
190 kfree(cifs_sb->mountdata);
191 unload_nls(cifs_sb->local_nls);
196 cifs_statfs(struct dentry *dentry, struct kstatfs *buf)
198 struct super_block *sb = dentry->d_sb;
199 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
200 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
201 int rc = -EOPNOTSUPP;
206 buf->f_type = CIFS_MAGIC_NUMBER;
209 * PATH_MAX may be too long - it would presumably be total path,
210 * but note that some servers (includinng Samba 3) have a shorter
213 * Instead could get the real value via SMB_QUERY_FS_ATTRIBUTE_INFO.
215 buf->f_namelen = PATH_MAX;
216 buf->f_files = 0; /* undefined */
217 buf->f_ffree = 0; /* unlimited */
220 * We could add a second check for a QFS Unix capability bit
222 if ((tcon->ses->capabilities & CAP_UNIX) &&
223 (CIFS_POSIX_EXTENSIONS & le64_to_cpu(tcon->fsUnixInfo.Capability)))
224 rc = CIFSSMBQFSPosixInfo(xid, tcon, buf);
227 * Only need to call the old QFSInfo if failed on newer one,
230 if (rc && (tcon->ses->capabilities & CAP_NT_SMBS))
231 rc = CIFSSMBQFSInfo(xid, tcon, buf);
234 * Some old Windows servers also do not support level 103, retry with
235 * older level one if old server failed the previous call or we
236 * bypassed it because we detected that this was an older LANMAN sess
239 rc = SMBOldQFSInfo(xid, tcon, buf);
245 static int cifs_permission(struct inode *inode, int mask, unsigned int flags)
247 struct cifs_sb_info *cifs_sb;
249 cifs_sb = CIFS_SB(inode->i_sb);
251 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) {
252 if ((mask & MAY_EXEC) && !execute_ok(inode))
256 } else /* file mode might have been restricted at mount time
257 on the client (above and beyond ACL on servers) for
258 servers which do not support setting and viewing mode bits,
259 so allowing client to check permissions is useful */
260 return generic_permission(inode, mask, flags, NULL);
263 static struct kmem_cache *cifs_inode_cachep;
264 static struct kmem_cache *cifs_req_cachep;
265 static struct kmem_cache *cifs_mid_cachep;
266 static struct kmem_cache *cifs_sm_req_cachep;
267 mempool_t *cifs_sm_req_poolp;
268 mempool_t *cifs_req_poolp;
269 mempool_t *cifs_mid_poolp;
271 static struct inode *
272 cifs_alloc_inode(struct super_block *sb)
274 struct cifsInodeInfo *cifs_inode;
275 cifs_inode = kmem_cache_alloc(cifs_inode_cachep, GFP_KERNEL);
278 cifs_inode->cifsAttrs = 0x20; /* default */
279 cifs_inode->time = 0;
280 /* Until the file is open and we have gotten oplock
281 info back from the server, can not assume caching of
282 file data or metadata */
283 cifs_set_oplock_level(cifs_inode, 0);
284 cifs_inode->delete_pending = false;
285 cifs_inode->invalid_mapping = false;
286 cifs_inode->vfs_inode.i_blkbits = 14; /* 2**14 = CIFS_MAX_MSGSIZE */
287 cifs_inode->server_eof = 0;
288 cifs_inode->uniqueid = 0;
289 cifs_inode->createtime = 0;
291 /* Can not set i_flags here - they get immediately overwritten
292 to zero by the VFS */
293 /* cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME;*/
294 INIT_LIST_HEAD(&cifs_inode->openFileList);
295 return &cifs_inode->vfs_inode;
298 static void cifs_i_callback(struct rcu_head *head)
300 struct inode *inode = container_of(head, struct inode, i_rcu);
301 INIT_LIST_HEAD(&inode->i_dentry);
302 kmem_cache_free(cifs_inode_cachep, CIFS_I(inode));
306 cifs_destroy_inode(struct inode *inode)
308 call_rcu(&inode->i_rcu, cifs_i_callback);
312 cifs_evict_inode(struct inode *inode)
314 truncate_inode_pages(&inode->i_data, 0);
315 end_writeback(inode);
316 cifs_fscache_release_inode_cookie(inode);
320 cifs_show_address(struct seq_file *s, struct TCP_Server_Info *server)
322 struct sockaddr_in *sa = (struct sockaddr_in *) &server->dstaddr;
323 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *) &server->dstaddr;
325 seq_printf(s, ",addr=");
327 switch (server->dstaddr.ss_family) {
329 seq_printf(s, "%pI4", &sa->sin_addr.s_addr);
332 seq_printf(s, "%pI6", &sa6->sin6_addr.s6_addr);
333 if (sa6->sin6_scope_id)
334 seq_printf(s, "%%%u", sa6->sin6_scope_id);
337 seq_printf(s, "(unknown)");
342 cifs_show_security(struct seq_file *s, struct TCP_Server_Info *server)
344 seq_printf(s, ",sec=");
346 switch (server->secType) {
348 seq_printf(s, "lanman");
351 seq_printf(s, "ntlmv2");
354 seq_printf(s, "ntlm");
357 seq_printf(s, "krb5");
360 seq_printf(s, "ntlmssp");
363 /* shouldn't ever happen */
364 seq_printf(s, "unknown");
368 if (server->sec_mode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
373 * cifs_show_options() is for displaying mount options in /proc/mounts.
374 * Not all settable options are displayed but most of the important
378 cifs_show_options(struct seq_file *s, struct vfsmount *m)
380 struct cifs_sb_info *cifs_sb = CIFS_SB(m->mnt_sb);
381 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
382 struct sockaddr *srcaddr;
383 srcaddr = (struct sockaddr *)&tcon->ses->server->srcaddr;
385 cifs_show_security(s, tcon->ses->server);
387 seq_printf(s, ",unc=%s", tcon->treeName);
389 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER)
390 seq_printf(s, ",multiuser");
391 else if (tcon->ses->user_name)
392 seq_printf(s, ",username=%s", tcon->ses->user_name);
394 if (tcon->ses->domainName)
395 seq_printf(s, ",domain=%s", tcon->ses->domainName);
397 if (srcaddr->sa_family != AF_UNSPEC) {
398 struct sockaddr_in *saddr4;
399 struct sockaddr_in6 *saddr6;
400 saddr4 = (struct sockaddr_in *)srcaddr;
401 saddr6 = (struct sockaddr_in6 *)srcaddr;
402 if (srcaddr->sa_family == AF_INET6)
403 seq_printf(s, ",srcaddr=%pI6c",
405 else if (srcaddr->sa_family == AF_INET)
406 seq_printf(s, ",srcaddr=%pI4",
407 &saddr4->sin_addr.s_addr);
409 seq_printf(s, ",srcaddr=BAD-AF:%i",
410 (int)(srcaddr->sa_family));
413 seq_printf(s, ",uid=%d", cifs_sb->mnt_uid);
414 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)
415 seq_printf(s, ",forceuid");
417 seq_printf(s, ",noforceuid");
419 seq_printf(s, ",gid=%d", cifs_sb->mnt_gid);
420 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)
421 seq_printf(s, ",forcegid");
423 seq_printf(s, ",noforcegid");
425 cifs_show_address(s, tcon->ses->server);
428 seq_printf(s, ",file_mode=0%o,dir_mode=0%o",
429 cifs_sb->mnt_file_mode,
430 cifs_sb->mnt_dir_mode);
432 seq_printf(s, ",seal");
434 seq_printf(s, ",nocase");
436 seq_printf(s, ",hard");
438 seq_printf(s, ",unix");
440 seq_printf(s, ",nounix");
441 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
442 seq_printf(s, ",posixpaths");
443 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)
444 seq_printf(s, ",setuids");
445 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
446 seq_printf(s, ",serverino");
447 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RWPIDFORWARD)
448 seq_printf(s, ",rwpidforward");
449 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL)
450 seq_printf(s, ",forcemand");
451 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO)
452 seq_printf(s, ",directio");
453 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
454 seq_printf(s, ",nouser_xattr");
455 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR)
456 seq_printf(s, ",mapchars");
457 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)
458 seq_printf(s, ",sfu");
459 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
460 seq_printf(s, ",nobrl");
461 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
462 seq_printf(s, ",cifsacl");
463 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)
464 seq_printf(s, ",dynperm");
465 if (m->mnt_sb->s_flags & MS_POSIXACL)
466 seq_printf(s, ",acl");
467 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS)
468 seq_printf(s, ",mfsymlinks");
469 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_FSCACHE)
470 seq_printf(s, ",fsc");
472 seq_printf(s, ",rsize=%d", cifs_sb->rsize);
473 seq_printf(s, ",wsize=%d", cifs_sb->wsize);
474 /* convert actimeo and display it in seconds */
475 seq_printf(s, ",actimeo=%lu", cifs_sb->actimeo / HZ);
480 static void cifs_umount_begin(struct super_block *sb)
482 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
483 struct cifs_tcon *tcon;
488 tcon = cifs_sb_master_tcon(cifs_sb);
490 spin_lock(&cifs_tcp_ses_lock);
491 if ((tcon->tc_count > 1) || (tcon->tidStatus == CifsExiting)) {
492 /* we have other mounts to same share or we have
493 already tried to force umount this and woken up
494 all waiting network requests, nothing to do */
495 spin_unlock(&cifs_tcp_ses_lock);
497 } else if (tcon->tc_count == 1)
498 tcon->tidStatus = CifsExiting;
499 spin_unlock(&cifs_tcp_ses_lock);
501 /* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */
502 /* cancel_notify_requests(tcon); */
503 if (tcon->ses && tcon->ses->server) {
504 cFYI(1, "wake up tasks now - umount begin not complete");
505 wake_up_all(&tcon->ses->server->request_q);
506 wake_up_all(&tcon->ses->server->response_q);
507 msleep(1); /* yield */
508 /* we have to kick the requests once more */
509 wake_up_all(&tcon->ses->server->response_q);
516 #ifdef CONFIG_CIFS_STATS2
517 static int cifs_show_stats(struct seq_file *s, struct vfsmount *mnt)
524 static int cifs_remount(struct super_block *sb, int *flags, char *data)
526 *flags |= MS_NODIRATIME;
530 static int cifs_drop_inode(struct inode *inode)
532 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
534 /* no serverino => unconditional eviction */
535 return !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) ||
536 generic_drop_inode(inode);
539 static const struct super_operations cifs_super_ops = {
540 .put_super = cifs_put_super,
541 .statfs = cifs_statfs,
542 .alloc_inode = cifs_alloc_inode,
543 .destroy_inode = cifs_destroy_inode,
544 .drop_inode = cifs_drop_inode,
545 .evict_inode = cifs_evict_inode,
546 /* .delete_inode = cifs_delete_inode, */ /* Do not need above
547 function unless later we add lazy close of inodes or unless the
548 kernel forgets to call us with the same number of releases (closes)
550 .show_options = cifs_show_options,
551 .umount_begin = cifs_umount_begin,
552 .remount_fs = cifs_remount,
553 #ifdef CONFIG_CIFS_STATS2
554 .show_stats = cifs_show_stats,
559 * Get root dentry from superblock according to prefix path mount option.
560 * Return dentry with refcount + 1 on success and NULL otherwise.
562 static struct dentry *
563 cifs_get_root(struct smb_vol *vol, struct super_block *sb)
568 struct dentry *dparent = NULL, *dchild = NULL, *alias;
569 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
570 unsigned int i, full_len, len;
571 char *full_path = NULL, *pstart;
574 full_path = cifs_build_path_to_root(vol, cifs_sb,
575 cifs_sb_master_tcon(cifs_sb));
576 if (full_path == NULL)
579 cFYI(1, "Get root dentry for %s", full_path);
582 sep = CIFS_DIR_SEP(cifs_sb);
583 dparent = dget(sb->s_root);
584 full_len = strlen(full_path);
585 full_path[full_len] = sep;
586 pstart = full_path + 1;
588 for (i = 1, len = 0; i <= full_len; i++) {
589 if (full_path[i] != sep || !len) {
595 cFYI(1, "get dentry for %s", pstart);
599 name.hash = full_name_hash(pstart, len);
600 dchild = d_lookup(dparent, &name);
601 if (dchild == NULL) {
602 cFYI(1, "not exists");
603 dchild = d_alloc(dparent, &name);
604 if (dchild == NULL) {
611 cFYI(1, "get inode");
612 if (dchild->d_inode == NULL) {
613 cFYI(1, "not exists");
615 if (cifs_sb_master_tcon(CIFS_SB(sb))->unix_ext)
616 rc = cifs_get_inode_info_unix(&inode, full_path,
619 rc = cifs_get_inode_info(&inode, full_path,
620 NULL, sb, xid, NULL);
627 alias = d_materialise_unique(dchild, inode);
638 cFYI(1, "parent %p, child %p", dparent, dchild);
643 pstart = full_path + i + 1;
652 static struct dentry *
653 cifs_do_mount(struct file_system_type *fs_type,
654 int flags, const char *dev_name, void *data)
657 struct super_block *sb;
658 struct cifs_sb_info *cifs_sb;
659 struct smb_vol *volume_info;
660 struct cifs_mnt_data mnt_data;
663 cFYI(1, "Devname: %s flags: %d ", dev_name, flags);
665 rc = cifs_setup_volume_info(&volume_info, (char *)data, dev_name);
669 cifs_sb = kzalloc(sizeof(struct cifs_sb_info), GFP_KERNEL);
670 if (cifs_sb == NULL) {
671 root = ERR_PTR(-ENOMEM);
672 unload_nls(volume_info->local_nls);
676 cifs_sb->mountdata = kstrndup(data, PAGE_SIZE, GFP_KERNEL);
677 if (cifs_sb->mountdata == NULL) {
678 root = ERR_PTR(-ENOMEM);
679 unload_nls(volume_info->local_nls);
684 cifs_setup_cifs_sb(volume_info, cifs_sb);
686 rc = cifs_mount(cifs_sb, volume_info);
688 if (!(flags & MS_SILENT))
689 cERROR(1, "cifs_mount failed w/return code = %d", rc);
691 unload_nls(volume_info->local_nls);
692 kfree(cifs_sb->mountdata);
697 mnt_data.vol = volume_info;
698 mnt_data.cifs_sb = cifs_sb;
699 mnt_data.flags = flags;
701 sb = sget(fs_type, cifs_match_super, set_anon_super, &mnt_data);
704 cifs_umount(cifs_sb);
709 cFYI(1, "Use existing superblock");
710 cifs_umount(cifs_sb);
711 kfree(cifs_sb->mountdata);
712 unload_nls(cifs_sb->local_nls);
718 /* BB should we make this contingent on mount parm? */
719 sb->s_flags |= MS_NODIRATIME | MS_NOATIME;
720 sb->s_fs_info = cifs_sb;
722 rc = cifs_read_super(sb);
728 sb->s_flags |= MS_ACTIVE;
730 root = cifs_get_root(volume_info, sb);
734 cFYI(1, "dentry root is: %p", root);
738 root = cifs_get_root(volume_info, sb);
740 cFYI(1, "dentry root is: %p", root);
744 deactivate_locked_super(sb);
748 kfree(cifs_sb->mountdata);
749 unload_nls(cifs_sb->local_nls);
753 cifs_cleanup_volume_info(&volume_info);
757 static ssize_t cifs_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
758 unsigned long nr_segs, loff_t pos)
760 struct inode *inode = iocb->ki_filp->f_path.dentry->d_inode;
764 written = generic_file_aio_write(iocb, iov, nr_segs, pos);
766 if (CIFS_I(inode)->clientCanCacheAll)
769 rc = filemap_fdatawrite(inode->i_mapping);
771 cFYI(1, "cifs_file_aio_write: %d rc on %p inode", rc, inode);
776 static loff_t cifs_llseek(struct file *file, loff_t offset, int origin)
778 /* origin == SEEK_END => we must revalidate the cached file length */
779 if (origin == SEEK_END) {
781 struct inode *inode = file->f_path.dentry->d_inode;
784 * We need to be sure that all dirty pages are written and the
785 * server has the newest file length.
787 if (!CIFS_I(inode)->clientCanCacheRead && inode->i_mapping &&
788 inode->i_mapping->nrpages != 0) {
789 rc = filemap_fdatawait(inode->i_mapping);
791 mapping_set_error(inode->i_mapping, rc);
796 * Some applications poll for the file length in this strange
797 * way so we must seek to end on non-oplocked files by
798 * setting the revalidate time to zero.
800 CIFS_I(inode)->time = 0;
802 rc = cifs_revalidate_file_attr(file);
806 return generic_file_llseek_unlocked(file, offset, origin);
809 static int cifs_setlease(struct file *file, long arg, struct file_lock **lease)
811 /* note that this is called by vfs setlease with lock_flocks held
812 to protect *lease from going away */
813 struct inode *inode = file->f_path.dentry->d_inode;
814 struct cifsFileInfo *cfile = file->private_data;
816 if (!(S_ISREG(inode->i_mode)))
819 /* check if file is oplocked */
820 if (((arg == F_RDLCK) &&
821 (CIFS_I(inode)->clientCanCacheRead)) ||
823 (CIFS_I(inode)->clientCanCacheAll)))
824 return generic_setlease(file, arg, lease);
825 else if (tlink_tcon(cfile->tlink)->local_lease &&
826 !CIFS_I(inode)->clientCanCacheRead)
827 /* If the server claims to support oplock on this
828 file, then we still need to check oplock even
829 if the local_lease mount option is set, but there
830 are servers which do not support oplock for which
831 this mount option may be useful if the user
832 knows that the file won't be changed on the server
834 return generic_setlease(file, arg, lease);
839 struct file_system_type cifs_fs_type = {
840 .owner = THIS_MODULE,
842 .mount = cifs_do_mount,
843 .kill_sb = cifs_kill_sb,
846 const struct inode_operations cifs_dir_inode_ops = {
847 .create = cifs_create,
848 .lookup = cifs_lookup,
849 .getattr = cifs_getattr,
850 .unlink = cifs_unlink,
851 .link = cifs_hardlink,
854 .rename = cifs_rename,
855 .permission = cifs_permission,
856 /* revalidate:cifs_revalidate, */
857 .setattr = cifs_setattr,
858 .symlink = cifs_symlink,
860 #ifdef CONFIG_CIFS_XATTR
861 .setxattr = cifs_setxattr,
862 .getxattr = cifs_getxattr,
863 .listxattr = cifs_listxattr,
864 .removexattr = cifs_removexattr,
868 const struct inode_operations cifs_file_inode_ops = {
869 /* revalidate:cifs_revalidate, */
870 .setattr = cifs_setattr,
871 .getattr = cifs_getattr, /* do we need this anymore? */
872 .rename = cifs_rename,
873 .permission = cifs_permission,
874 #ifdef CONFIG_CIFS_XATTR
875 .setxattr = cifs_setxattr,
876 .getxattr = cifs_getxattr,
877 .listxattr = cifs_listxattr,
878 .removexattr = cifs_removexattr,
882 const struct inode_operations cifs_symlink_inode_ops = {
883 .readlink = generic_readlink,
884 .follow_link = cifs_follow_link,
885 .put_link = cifs_put_link,
886 .permission = cifs_permission,
887 /* BB add the following two eventually */
888 /* revalidate: cifs_revalidate,
889 setattr: cifs_notify_change, *//* BB do we need notify change */
890 #ifdef CONFIG_CIFS_XATTR
891 .setxattr = cifs_setxattr,
892 .getxattr = cifs_getxattr,
893 .listxattr = cifs_listxattr,
894 .removexattr = cifs_removexattr,
898 const struct file_operations cifs_file_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,
908 .mmap = cifs_file_mmap,
909 .splice_read = generic_file_splice_read,
910 .llseek = cifs_llseek,
911 #ifdef CONFIG_CIFS_POSIX
912 .unlocked_ioctl = cifs_ioctl,
913 #endif /* CONFIG_CIFS_POSIX */
914 .setlease = cifs_setlease,
917 const struct file_operations cifs_file_strict_ops = {
918 .read = do_sync_read,
919 .write = do_sync_write,
920 .aio_read = cifs_strict_readv,
921 .aio_write = cifs_strict_writev,
923 .release = cifs_close,
925 .fsync = cifs_strict_fsync,
927 .mmap = cifs_file_strict_mmap,
928 .splice_read = generic_file_splice_read,
929 .llseek = cifs_llseek,
930 #ifdef CONFIG_CIFS_POSIX
931 .unlocked_ioctl = cifs_ioctl,
932 #endif /* CONFIG_CIFS_POSIX */
933 .setlease = cifs_setlease,
936 const struct file_operations cifs_file_direct_ops = {
937 /* BB reevaluate whether they can be done with directio, no cache */
938 .read = do_sync_read,
939 .write = do_sync_write,
940 .aio_read = cifs_user_readv,
941 .aio_write = cifs_user_writev,
943 .release = cifs_close,
947 .mmap = cifs_file_mmap,
948 .splice_read = generic_file_splice_read,
949 #ifdef CONFIG_CIFS_POSIX
950 .unlocked_ioctl = cifs_ioctl,
951 #endif /* CONFIG_CIFS_POSIX */
952 .llseek = cifs_llseek,
953 .setlease = cifs_setlease,
956 const struct file_operations cifs_file_nobrl_ops = {
957 .read = do_sync_read,
958 .write = do_sync_write,
959 .aio_read = generic_file_aio_read,
960 .aio_write = cifs_file_aio_write,
962 .release = cifs_close,
965 .mmap = cifs_file_mmap,
966 .splice_read = generic_file_splice_read,
967 .llseek = cifs_llseek,
968 #ifdef CONFIG_CIFS_POSIX
969 .unlocked_ioctl = cifs_ioctl,
970 #endif /* CONFIG_CIFS_POSIX */
971 .setlease = cifs_setlease,
974 const struct file_operations cifs_file_strict_nobrl_ops = {
975 .read = do_sync_read,
976 .write = do_sync_write,
977 .aio_read = cifs_strict_readv,
978 .aio_write = cifs_strict_writev,
980 .release = cifs_close,
981 .fsync = cifs_strict_fsync,
983 .mmap = cifs_file_strict_mmap,
984 .splice_read = generic_file_splice_read,
985 .llseek = cifs_llseek,
986 #ifdef CONFIG_CIFS_POSIX
987 .unlocked_ioctl = cifs_ioctl,
988 #endif /* CONFIG_CIFS_POSIX */
989 .setlease = cifs_setlease,
992 const struct file_operations cifs_file_direct_nobrl_ops = {
993 /* BB reevaluate whether they can be done with directio, no cache */
994 .read = do_sync_read,
995 .write = do_sync_write,
996 .aio_read = cifs_user_readv,
997 .aio_write = cifs_user_writev,
999 .release = cifs_close,
1000 .fsync = cifs_fsync,
1001 .flush = cifs_flush,
1002 .mmap = cifs_file_mmap,
1003 .splice_read = generic_file_splice_read,
1004 #ifdef CONFIG_CIFS_POSIX
1005 .unlocked_ioctl = cifs_ioctl,
1006 #endif /* CONFIG_CIFS_POSIX */
1007 .llseek = cifs_llseek,
1008 .setlease = cifs_setlease,
1011 const struct file_operations cifs_dir_ops = {
1012 .readdir = cifs_readdir,
1013 .release = cifs_closedir,
1014 .read = generic_read_dir,
1015 .unlocked_ioctl = cifs_ioctl,
1016 .llseek = generic_file_llseek,
1020 cifs_init_once(void *inode)
1022 struct cifsInodeInfo *cifsi = inode;
1024 inode_init_once(&cifsi->vfs_inode);
1025 INIT_LIST_HEAD(&cifsi->lockList);
1029 cifs_init_inodecache(void)
1031 cifs_inode_cachep = kmem_cache_create("cifs_inode_cache",
1032 sizeof(struct cifsInodeInfo),
1033 0, (SLAB_RECLAIM_ACCOUNT|
1036 if (cifs_inode_cachep == NULL)
1043 cifs_destroy_inodecache(void)
1045 kmem_cache_destroy(cifs_inode_cachep);
1049 cifs_init_request_bufs(void)
1051 if (CIFSMaxBufSize < 8192) {
1052 /* Buffer size can not be smaller than 2 * PATH_MAX since maximum
1053 Unicode path name has to fit in any SMB/CIFS path based frames */
1054 CIFSMaxBufSize = 8192;
1055 } else if (CIFSMaxBufSize > 1024*127) {
1056 CIFSMaxBufSize = 1024 * 127;
1058 CIFSMaxBufSize &= 0x1FE00; /* Round size to even 512 byte mult*/
1060 /* cERROR(1, "CIFSMaxBufSize %d 0x%x",CIFSMaxBufSize,CIFSMaxBufSize); */
1061 cifs_req_cachep = kmem_cache_create("cifs_request",
1063 MAX_CIFS_HDR_SIZE, 0,
1064 SLAB_HWCACHE_ALIGN, NULL);
1065 if (cifs_req_cachep == NULL)
1068 if (cifs_min_rcv < 1)
1070 else if (cifs_min_rcv > 64) {
1072 cERROR(1, "cifs_min_rcv set to maximum (64)");
1075 cifs_req_poolp = mempool_create_slab_pool(cifs_min_rcv,
1078 if (cifs_req_poolp == NULL) {
1079 kmem_cache_destroy(cifs_req_cachep);
1082 /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and
1083 almost all handle based requests (but not write response, nor is it
1084 sufficient for path based requests). A smaller size would have
1085 been more efficient (compacting multiple slab items on one 4k page)
1086 for the case in which debug was on, but this larger size allows
1087 more SMBs to use small buffer alloc and is still much more
1088 efficient to alloc 1 per page off the slab compared to 17K (5page)
1089 alloc of large cifs buffers even when page debugging is on */
1090 cifs_sm_req_cachep = kmem_cache_create("cifs_small_rq",
1091 MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN,
1093 if (cifs_sm_req_cachep == NULL) {
1094 mempool_destroy(cifs_req_poolp);
1095 kmem_cache_destroy(cifs_req_cachep);
1099 if (cifs_min_small < 2)
1101 else if (cifs_min_small > 256) {
1102 cifs_min_small = 256;
1103 cFYI(1, "cifs_min_small set to maximum (256)");
1106 cifs_sm_req_poolp = mempool_create_slab_pool(cifs_min_small,
1107 cifs_sm_req_cachep);
1109 if (cifs_sm_req_poolp == NULL) {
1110 mempool_destroy(cifs_req_poolp);
1111 kmem_cache_destroy(cifs_req_cachep);
1112 kmem_cache_destroy(cifs_sm_req_cachep);
1120 cifs_destroy_request_bufs(void)
1122 mempool_destroy(cifs_req_poolp);
1123 kmem_cache_destroy(cifs_req_cachep);
1124 mempool_destroy(cifs_sm_req_poolp);
1125 kmem_cache_destroy(cifs_sm_req_cachep);
1129 cifs_init_mids(void)
1131 cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids",
1132 sizeof(struct mid_q_entry), 0,
1133 SLAB_HWCACHE_ALIGN, NULL);
1134 if (cifs_mid_cachep == NULL)
1137 /* 3 is a reasonable minimum number of simultaneous operations */
1138 cifs_mid_poolp = mempool_create_slab_pool(3, cifs_mid_cachep);
1139 if (cifs_mid_poolp == NULL) {
1140 kmem_cache_destroy(cifs_mid_cachep);
1148 cifs_destroy_mids(void)
1150 mempool_destroy(cifs_mid_poolp);
1151 kmem_cache_destroy(cifs_mid_cachep);
1159 INIT_LIST_HEAD(&cifs_tcp_ses_list);
1160 #ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
1161 INIT_LIST_HEAD(&GlobalDnotifyReqList);
1162 INIT_LIST_HEAD(&GlobalDnotifyRsp_Q);
1163 #endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
1165 * Initialize Global counters
1167 atomic_set(&sesInfoAllocCount, 0);
1168 atomic_set(&tconInfoAllocCount, 0);
1169 atomic_set(&tcpSesAllocCount, 0);
1170 atomic_set(&tcpSesReconnectCount, 0);
1171 atomic_set(&tconInfoReconnectCount, 0);
1173 atomic_set(&bufAllocCount, 0);
1174 atomic_set(&smBufAllocCount, 0);
1175 #ifdef CONFIG_CIFS_STATS2
1176 atomic_set(&totBufAllocCount, 0);
1177 atomic_set(&totSmBufAllocCount, 0);
1178 #endif /* CONFIG_CIFS_STATS2 */
1180 atomic_set(&midCount, 0);
1181 GlobalCurrentXid = 0;
1182 GlobalTotalActiveXid = 0;
1183 GlobalMaxActiveXid = 0;
1184 spin_lock_init(&cifs_tcp_ses_lock);
1185 spin_lock_init(&cifs_file_list_lock);
1186 spin_lock_init(&GlobalMid_Lock);
1188 if (cifs_max_pending < 2) {
1189 cifs_max_pending = 2;
1190 cFYI(1, "cifs_max_pending set to min of 2");
1191 } else if (cifs_max_pending > 256) {
1192 cifs_max_pending = 256;
1193 cFYI(1, "cifs_max_pending set to max of 256");
1196 rc = cifs_fscache_register();
1198 goto out_clean_proc;
1200 rc = cifs_init_inodecache();
1202 goto out_unreg_fscache;
1204 rc = cifs_init_mids();
1206 goto out_destroy_inodecache;
1208 rc = cifs_init_request_bufs();
1210 goto out_destroy_mids;
1212 #ifdef CONFIG_CIFS_UPCALL
1213 rc = register_key_type(&cifs_spnego_key_type);
1215 goto out_destroy_request_bufs;
1216 #endif /* CONFIG_CIFS_UPCALL */
1218 #ifdef CONFIG_CIFS_ACL
1219 rc = init_cifs_idmap();
1221 goto out_register_key_type;
1222 #endif /* CONFIG_CIFS_ACL */
1224 rc = register_filesystem(&cifs_fs_type);
1226 goto out_init_cifs_idmap;
1230 out_init_cifs_idmap:
1231 #ifdef CONFIG_CIFS_ACL
1233 out_register_key_type:
1235 #ifdef CONFIG_CIFS_UPCALL
1236 unregister_key_type(&cifs_spnego_key_type);
1237 out_destroy_request_bufs:
1239 cifs_destroy_request_bufs();
1241 cifs_destroy_mids();
1242 out_destroy_inodecache:
1243 cifs_destroy_inodecache();
1245 cifs_fscache_unregister();
1254 cFYI(DBG2, "exit_cifs");
1256 cifs_fscache_unregister();
1257 #ifdef CONFIG_CIFS_DFS_UPCALL
1258 cifs_dfs_release_automount_timer();
1260 #ifdef CONFIG_CIFS_ACL
1261 cifs_destroy_idmaptrees();
1264 #ifdef CONFIG_CIFS_UPCALL
1265 unregister_key_type(&cifs_spnego_key_type);
1267 unregister_filesystem(&cifs_fs_type);
1268 cifs_destroy_inodecache();
1269 cifs_destroy_mids();
1270 cifs_destroy_request_bufs();
1273 MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>");
1274 MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */
1276 ("VFS to access servers complying with the SNIA CIFS Specification "
1277 "e.g. Samba and Windows");
1278 MODULE_VERSION(CIFS_VERSION);
1279 module_init(init_cifs)
1280 module_exit(exit_cifs)