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 = cifs_mount(sb, cifs_sb, volume_info, devname);
123 cERROR(1, "cifs_mount failed w/return code = %d", rc);
127 sb->s_magic = CIFS_MAGIC_NUMBER;
128 sb->s_op = &cifs_super_ops;
129 sb->s_bdi = &cifs_sb->bdi;
130 sb->s_blocksize = CIFS_MAX_MSGSIZE;
131 sb->s_blocksize_bits = 14; /* default 2**14 = CIFS_MAX_MSGSIZE */
132 inode = cifs_root_iget(sb);
140 sb->s_root = d_alloc_root(inode);
147 /* do that *after* d_alloc_root() - we want NULL ->d_op for root here */
148 if (cifs_sb_master_tcon(cifs_sb)->nocase)
149 sb->s_d_op = &cifs_ci_dentry_ops;
151 sb->s_d_op = &cifs_dentry_ops;
153 #ifdef CIFS_NFSD_EXPORT
154 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
155 cFYI(1, "export ops supported");
156 sb->s_export_op = &cifs_export_ops;
158 #endif /* CIFS_NFSD_EXPORT */
163 cERROR(1, "cifs_read_super: get root inode failed");
167 cifs_umount(sb, cifs_sb);
172 cifs_put_super(struct super_block *sb)
175 struct cifs_sb_info *cifs_sb;
177 cFYI(1, "In cifs_put_super");
178 cifs_sb = CIFS_SB(sb);
179 if (cifs_sb == NULL) {
180 cFYI(1, "Empty cifs superblock info passed to unmount");
184 rc = cifs_umount(sb, cifs_sb);
186 cERROR(1, "cifs_umount failed with return code %d", rc);
189 static void cifs_kill_sb(struct super_block *sb)
191 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
193 kfree(cifs_sb->mountdata);
194 unload_nls(cifs_sb->local_nls);
199 cifs_statfs(struct dentry *dentry, struct kstatfs *buf)
201 struct super_block *sb = dentry->d_sb;
202 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
203 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
204 int rc = -EOPNOTSUPP;
209 buf->f_type = CIFS_MAGIC_NUMBER;
212 * PATH_MAX may be too long - it would presumably be total path,
213 * but note that some servers (includinng Samba 3) have a shorter
216 * Instead could get the real value via SMB_QUERY_FS_ATTRIBUTE_INFO.
218 buf->f_namelen = PATH_MAX;
219 buf->f_files = 0; /* undefined */
220 buf->f_ffree = 0; /* unlimited */
223 * We could add a second check for a QFS Unix capability bit
225 if ((tcon->ses->capabilities & CAP_UNIX) &&
226 (CIFS_POSIX_EXTENSIONS & le64_to_cpu(tcon->fsUnixInfo.Capability)))
227 rc = CIFSSMBQFSPosixInfo(xid, tcon, buf);
230 * Only need to call the old QFSInfo if failed on newer one,
233 if (rc && (tcon->ses->capabilities & CAP_NT_SMBS))
234 rc = CIFSSMBQFSInfo(xid, tcon, buf);
237 * Some old Windows servers also do not support level 103, retry with
238 * older level one if old server failed the previous call or we
239 * bypassed it because we detected that this was an older LANMAN sess
242 rc = SMBOldQFSInfo(xid, tcon, buf);
248 static int cifs_permission(struct inode *inode, int mask, unsigned int flags)
250 struct cifs_sb_info *cifs_sb;
252 cifs_sb = CIFS_SB(inode->i_sb);
254 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) {
255 if ((mask & MAY_EXEC) && !execute_ok(inode))
259 } else /* file mode might have been restricted at mount time
260 on the client (above and beyond ACL on servers) for
261 servers which do not support setting and viewing mode bits,
262 so allowing client to check permissions is useful */
263 return generic_permission(inode, mask, flags, NULL);
266 static struct kmem_cache *cifs_inode_cachep;
267 static struct kmem_cache *cifs_req_cachep;
268 static struct kmem_cache *cifs_mid_cachep;
269 static struct kmem_cache *cifs_sm_req_cachep;
270 mempool_t *cifs_sm_req_poolp;
271 mempool_t *cifs_req_poolp;
272 mempool_t *cifs_mid_poolp;
274 static struct inode *
275 cifs_alloc_inode(struct super_block *sb)
277 struct cifsInodeInfo *cifs_inode;
278 cifs_inode = kmem_cache_alloc(cifs_inode_cachep, GFP_KERNEL);
281 cifs_inode->cifsAttrs = 0x20; /* default */
282 cifs_inode->time = 0;
283 /* Until the file is open and we have gotten oplock
284 info back from the server, can not assume caching of
285 file data or metadata */
286 cifs_set_oplock_level(cifs_inode, 0);
287 cifs_inode->delete_pending = false;
288 cifs_inode->invalid_mapping = false;
289 cifs_inode->vfs_inode.i_blkbits = 14; /* 2**14 = CIFS_MAX_MSGSIZE */
290 cifs_inode->server_eof = 0;
291 cifs_inode->uniqueid = 0;
292 cifs_inode->createtime = 0;
294 /* Can not set i_flags here - they get immediately overwritten
295 to zero by the VFS */
296 /* cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME;*/
297 INIT_LIST_HEAD(&cifs_inode->openFileList);
298 return &cifs_inode->vfs_inode;
301 static void cifs_i_callback(struct rcu_head *head)
303 struct inode *inode = container_of(head, struct inode, i_rcu);
304 INIT_LIST_HEAD(&inode->i_dentry);
305 kmem_cache_free(cifs_inode_cachep, CIFS_I(inode));
309 cifs_destroy_inode(struct inode *inode)
311 call_rcu(&inode->i_rcu, cifs_i_callback);
315 cifs_evict_inode(struct inode *inode)
317 truncate_inode_pages(&inode->i_data, 0);
318 end_writeback(inode);
319 cifs_fscache_release_inode_cookie(inode);
323 cifs_show_address(struct seq_file *s, struct TCP_Server_Info *server)
325 struct sockaddr_in *sa = (struct sockaddr_in *) &server->dstaddr;
326 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *) &server->dstaddr;
328 seq_printf(s, ",addr=");
330 switch (server->dstaddr.ss_family) {
332 seq_printf(s, "%pI4", &sa->sin_addr.s_addr);
335 seq_printf(s, "%pI6", &sa6->sin6_addr.s6_addr);
336 if (sa6->sin6_scope_id)
337 seq_printf(s, "%%%u", sa6->sin6_scope_id);
340 seq_printf(s, "(unknown)");
345 cifs_show_security(struct seq_file *s, struct TCP_Server_Info *server)
347 seq_printf(s, ",sec=");
349 switch (server->secType) {
351 seq_printf(s, "lanman");
354 seq_printf(s, "ntlmv2");
357 seq_printf(s, "ntlm");
360 seq_printf(s, "krb5");
363 seq_printf(s, "ntlmssp");
366 /* shouldn't ever happen */
367 seq_printf(s, "unknown");
371 if (server->sec_mode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
376 * cifs_show_options() is for displaying mount options in /proc/mounts.
377 * Not all settable options are displayed but most of the important
381 cifs_show_options(struct seq_file *s, struct vfsmount *m)
383 struct cifs_sb_info *cifs_sb = CIFS_SB(m->mnt_sb);
384 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
385 struct sockaddr *srcaddr;
386 srcaddr = (struct sockaddr *)&tcon->ses->server->srcaddr;
388 cifs_show_security(s, tcon->ses->server);
390 seq_printf(s, ",unc=%s", tcon->treeName);
392 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER)
393 seq_printf(s, ",multiuser");
394 else if (tcon->ses->user_name)
395 seq_printf(s, ",username=%s", tcon->ses->user_name);
397 if (tcon->ses->domainName)
398 seq_printf(s, ",domain=%s", tcon->ses->domainName);
400 if (srcaddr->sa_family != AF_UNSPEC) {
401 struct sockaddr_in *saddr4;
402 struct sockaddr_in6 *saddr6;
403 saddr4 = (struct sockaddr_in *)srcaddr;
404 saddr6 = (struct sockaddr_in6 *)srcaddr;
405 if (srcaddr->sa_family == AF_INET6)
406 seq_printf(s, ",srcaddr=%pI6c",
408 else if (srcaddr->sa_family == AF_INET)
409 seq_printf(s, ",srcaddr=%pI4",
410 &saddr4->sin_addr.s_addr);
412 seq_printf(s, ",srcaddr=BAD-AF:%i",
413 (int)(srcaddr->sa_family));
416 seq_printf(s, ",uid=%d", cifs_sb->mnt_uid);
417 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)
418 seq_printf(s, ",forceuid");
420 seq_printf(s, ",noforceuid");
422 seq_printf(s, ",gid=%d", cifs_sb->mnt_gid);
423 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)
424 seq_printf(s, ",forcegid");
426 seq_printf(s, ",noforcegid");
428 cifs_show_address(s, tcon->ses->server);
431 seq_printf(s, ",file_mode=0%o,dir_mode=0%o",
432 cifs_sb->mnt_file_mode,
433 cifs_sb->mnt_dir_mode);
435 seq_printf(s, ",seal");
437 seq_printf(s, ",nocase");
439 seq_printf(s, ",hard");
441 seq_printf(s, ",unix");
443 seq_printf(s, ",nounix");
444 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
445 seq_printf(s, ",posixpaths");
446 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)
447 seq_printf(s, ",setuids");
448 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
449 seq_printf(s, ",serverino");
450 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RWPIDFORWARD)
451 seq_printf(s, ",rwpidforward");
452 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL)
453 seq_printf(s, ",forcemand");
454 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO)
455 seq_printf(s, ",directio");
456 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
457 seq_printf(s, ",nouser_xattr");
458 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR)
459 seq_printf(s, ",mapchars");
460 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)
461 seq_printf(s, ",sfu");
462 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
463 seq_printf(s, ",nobrl");
464 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
465 seq_printf(s, ",cifsacl");
466 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)
467 seq_printf(s, ",dynperm");
468 if (m->mnt_sb->s_flags & MS_POSIXACL)
469 seq_printf(s, ",acl");
470 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS)
471 seq_printf(s, ",mfsymlinks");
472 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_FSCACHE)
473 seq_printf(s, ",fsc");
475 seq_printf(s, ",rsize=%d", cifs_sb->rsize);
476 seq_printf(s, ",wsize=%d", cifs_sb->wsize);
477 /* convert actimeo and display it in seconds */
478 seq_printf(s, ",actimeo=%lu", cifs_sb->actimeo / HZ);
483 static void cifs_umount_begin(struct super_block *sb)
485 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
486 struct cifs_tcon *tcon;
491 tcon = cifs_sb_master_tcon(cifs_sb);
493 spin_lock(&cifs_tcp_ses_lock);
494 if ((tcon->tc_count > 1) || (tcon->tidStatus == CifsExiting)) {
495 /* we have other mounts to same share or we have
496 already tried to force umount this and woken up
497 all waiting network requests, nothing to do */
498 spin_unlock(&cifs_tcp_ses_lock);
500 } else if (tcon->tc_count == 1)
501 tcon->tidStatus = CifsExiting;
502 spin_unlock(&cifs_tcp_ses_lock);
504 /* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */
505 /* cancel_notify_requests(tcon); */
506 if (tcon->ses && tcon->ses->server) {
507 cFYI(1, "wake up tasks now - umount begin not complete");
508 wake_up_all(&tcon->ses->server->request_q);
509 wake_up_all(&tcon->ses->server->response_q);
510 msleep(1); /* yield */
511 /* we have to kick the requests once more */
512 wake_up_all(&tcon->ses->server->response_q);
519 #ifdef CONFIG_CIFS_STATS2
520 static int cifs_show_stats(struct seq_file *s, struct vfsmount *mnt)
527 static int cifs_remount(struct super_block *sb, int *flags, char *data)
529 *flags |= MS_NODIRATIME;
533 static int cifs_drop_inode(struct inode *inode)
535 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
537 /* no serverino => unconditional eviction */
538 return !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) ||
539 generic_drop_inode(inode);
542 static const struct super_operations cifs_super_ops = {
543 .put_super = cifs_put_super,
544 .statfs = cifs_statfs,
545 .alloc_inode = cifs_alloc_inode,
546 .destroy_inode = cifs_destroy_inode,
547 .drop_inode = cifs_drop_inode,
548 .evict_inode = cifs_evict_inode,
549 /* .delete_inode = cifs_delete_inode, */ /* Do not need above
550 function unless later we add lazy close of inodes or unless the
551 kernel forgets to call us with the same number of releases (closes)
553 .show_options = cifs_show_options,
554 .umount_begin = cifs_umount_begin,
555 .remount_fs = cifs_remount,
556 #ifdef CONFIG_CIFS_STATS2
557 .show_stats = cifs_show_stats,
562 * Get root dentry from superblock according to prefix path mount option.
563 * Return dentry with refcount + 1 on success and NULL otherwise.
565 static struct dentry *
566 cifs_get_root(struct smb_vol *vol, struct super_block *sb)
571 struct dentry *dparent = NULL, *dchild = NULL, *alias;
572 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
573 unsigned int i, full_len, len;
574 char *full_path = NULL, *pstart;
577 full_path = cifs_build_path_to_root(vol, cifs_sb,
578 cifs_sb_master_tcon(cifs_sb));
579 if (full_path == NULL)
582 cFYI(1, "Get root dentry for %s", full_path);
585 sep = CIFS_DIR_SEP(cifs_sb);
586 dparent = dget(sb->s_root);
587 full_len = strlen(full_path);
588 full_path[full_len] = sep;
589 pstart = full_path + 1;
591 for (i = 1, len = 0; i <= full_len; i++) {
592 if (full_path[i] != sep || !len) {
598 cFYI(1, "get dentry for %s", pstart);
602 name.hash = full_name_hash(pstart, len);
603 dchild = d_lookup(dparent, &name);
604 if (dchild == NULL) {
605 cFYI(1, "not exists");
606 dchild = d_alloc(dparent, &name);
607 if (dchild == NULL) {
614 cFYI(1, "get inode");
615 if (dchild->d_inode == NULL) {
616 cFYI(1, "not exists");
618 if (cifs_sb_master_tcon(CIFS_SB(sb))->unix_ext)
619 rc = cifs_get_inode_info_unix(&inode, full_path,
622 rc = cifs_get_inode_info(&inode, full_path,
623 NULL, sb, xid, NULL);
630 alias = d_materialise_unique(dchild, inode);
641 cFYI(1, "parent %p, child %p", dparent, dchild);
646 pstart = full_path + i + 1;
655 static struct dentry *
656 cifs_do_mount(struct file_system_type *fs_type,
657 int flags, const char *dev_name, void *data)
660 struct super_block *sb;
661 struct cifs_sb_info *cifs_sb;
662 struct smb_vol *volume_info;
663 struct cifs_mnt_data mnt_data;
666 cFYI(1, "Devname: %s flags: %d ", dev_name, flags);
668 rc = cifs_setup_volume_info(&volume_info, (char *)data, dev_name);
672 cifs_sb = kzalloc(sizeof(struct cifs_sb_info), GFP_KERNEL);
673 if (cifs_sb == NULL) {
674 root = ERR_PTR(-ENOMEM);
675 unload_nls(volume_info->local_nls);
679 cifs_setup_cifs_sb(volume_info, cifs_sb);
681 mnt_data.vol = volume_info;
682 mnt_data.cifs_sb = cifs_sb;
683 mnt_data.flags = flags;
685 sb = sget(fs_type, cifs_match_super, set_anon_super, &mnt_data);
692 cFYI(1, "Use existing superblock");
697 * Copy mount params for use in submounts. Better to do
698 * the copy here and deal with the error before cleanup gets
699 * complicated post-mount.
701 cifs_sb->mountdata = kstrndup(data, PAGE_SIZE, GFP_KERNEL);
702 if (cifs_sb->mountdata == NULL) {
703 root = ERR_PTR(-ENOMEM);
708 /* BB should we make this contingent on mount parm? */
709 sb->s_flags |= MS_NODIRATIME | MS_NOATIME;
710 sb->s_fs_info = cifs_sb;
712 rc = cifs_read_super(sb, volume_info, dev_name,
713 flags & MS_SILENT ? 1 : 0);
719 sb->s_flags |= MS_ACTIVE;
721 root = cifs_get_root(volume_info, sb);
725 cFYI(1, "dentry root is: %p", root);
729 root = cifs_get_root(volume_info, sb);
731 cFYI(1, "dentry root is: %p", root);
735 deactivate_locked_super(sb);
739 unload_nls(cifs_sb->local_nls);
743 cifs_cleanup_volume_info(&volume_info);
747 static ssize_t cifs_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
748 unsigned long nr_segs, loff_t pos)
750 struct inode *inode = iocb->ki_filp->f_path.dentry->d_inode;
754 written = generic_file_aio_write(iocb, iov, nr_segs, pos);
756 if (CIFS_I(inode)->clientCanCacheAll)
759 rc = filemap_fdatawrite(inode->i_mapping);
761 cFYI(1, "cifs_file_aio_write: %d rc on %p inode", rc, inode);
766 static loff_t cifs_llseek(struct file *file, loff_t offset, int origin)
768 /* origin == SEEK_END => we must revalidate the cached file length */
769 if (origin == SEEK_END) {
771 struct inode *inode = file->f_path.dentry->d_inode;
774 * We need to be sure that all dirty pages are written and the
775 * server has the newest file length.
777 if (!CIFS_I(inode)->clientCanCacheRead && inode->i_mapping &&
778 inode->i_mapping->nrpages != 0) {
779 rc = filemap_fdatawait(inode->i_mapping);
781 mapping_set_error(inode->i_mapping, rc);
786 * Some applications poll for the file length in this strange
787 * way so we must seek to end on non-oplocked files by
788 * setting the revalidate time to zero.
790 CIFS_I(inode)->time = 0;
792 rc = cifs_revalidate_file_attr(file);
796 return generic_file_llseek_unlocked(file, offset, origin);
799 static int cifs_setlease(struct file *file, long arg, struct file_lock **lease)
801 /* note that this is called by vfs setlease with lock_flocks held
802 to protect *lease from going away */
803 struct inode *inode = file->f_path.dentry->d_inode;
804 struct cifsFileInfo *cfile = file->private_data;
806 if (!(S_ISREG(inode->i_mode)))
809 /* check if file is oplocked */
810 if (((arg == F_RDLCK) &&
811 (CIFS_I(inode)->clientCanCacheRead)) ||
813 (CIFS_I(inode)->clientCanCacheAll)))
814 return generic_setlease(file, arg, lease);
815 else if (tlink_tcon(cfile->tlink)->local_lease &&
816 !CIFS_I(inode)->clientCanCacheRead)
817 /* If the server claims to support oplock on this
818 file, then we still need to check oplock even
819 if the local_lease mount option is set, but there
820 are servers which do not support oplock for which
821 this mount option may be useful if the user
822 knows that the file won't be changed on the server
824 return generic_setlease(file, arg, lease);
829 struct file_system_type cifs_fs_type = {
830 .owner = THIS_MODULE,
832 .mount = cifs_do_mount,
833 .kill_sb = cifs_kill_sb,
836 const struct inode_operations cifs_dir_inode_ops = {
837 .create = cifs_create,
838 .lookup = cifs_lookup,
839 .getattr = cifs_getattr,
840 .unlink = cifs_unlink,
841 .link = cifs_hardlink,
844 .rename = cifs_rename,
845 .permission = cifs_permission,
846 /* revalidate:cifs_revalidate, */
847 .setattr = cifs_setattr,
848 .symlink = cifs_symlink,
850 #ifdef CONFIG_CIFS_XATTR
851 .setxattr = cifs_setxattr,
852 .getxattr = cifs_getxattr,
853 .listxattr = cifs_listxattr,
854 .removexattr = cifs_removexattr,
858 const struct inode_operations cifs_file_inode_ops = {
859 /* revalidate:cifs_revalidate, */
860 .setattr = cifs_setattr,
861 .getattr = cifs_getattr, /* do we need this anymore? */
862 .rename = cifs_rename,
863 .permission = cifs_permission,
864 #ifdef CONFIG_CIFS_XATTR
865 .setxattr = cifs_setxattr,
866 .getxattr = cifs_getxattr,
867 .listxattr = cifs_listxattr,
868 .removexattr = cifs_removexattr,
872 const struct inode_operations cifs_symlink_inode_ops = {
873 .readlink = generic_readlink,
874 .follow_link = cifs_follow_link,
875 .put_link = cifs_put_link,
876 .permission = cifs_permission,
877 /* BB add the following two eventually */
878 /* revalidate: cifs_revalidate,
879 setattr: cifs_notify_change, *//* BB do we need notify change */
880 #ifdef CONFIG_CIFS_XATTR
881 .setxattr = cifs_setxattr,
882 .getxattr = cifs_getxattr,
883 .listxattr = cifs_listxattr,
884 .removexattr = cifs_removexattr,
888 const struct file_operations cifs_file_ops = {
889 .read = do_sync_read,
890 .write = do_sync_write,
891 .aio_read = generic_file_aio_read,
892 .aio_write = cifs_file_aio_write,
894 .release = cifs_close,
898 .mmap = cifs_file_mmap,
899 .splice_read = generic_file_splice_read,
900 .llseek = cifs_llseek,
901 #ifdef CONFIG_CIFS_POSIX
902 .unlocked_ioctl = cifs_ioctl,
903 #endif /* CONFIG_CIFS_POSIX */
904 .setlease = cifs_setlease,
907 const struct file_operations cifs_file_strict_ops = {
908 .read = do_sync_read,
909 .write = do_sync_write,
910 .aio_read = cifs_strict_readv,
911 .aio_write = cifs_strict_writev,
913 .release = cifs_close,
915 .fsync = cifs_strict_fsync,
917 .mmap = cifs_file_strict_mmap,
918 .splice_read = generic_file_splice_read,
919 .llseek = cifs_llseek,
920 #ifdef CONFIG_CIFS_POSIX
921 .unlocked_ioctl = cifs_ioctl,
922 #endif /* CONFIG_CIFS_POSIX */
923 .setlease = cifs_setlease,
926 const struct file_operations cifs_file_direct_ops = {
927 /* BB reevaluate whether they can be done with directio, no cache */
928 .read = do_sync_read,
929 .write = do_sync_write,
930 .aio_read = cifs_user_readv,
931 .aio_write = cifs_user_writev,
933 .release = cifs_close,
937 .mmap = cifs_file_mmap,
938 .splice_read = generic_file_splice_read,
939 #ifdef CONFIG_CIFS_POSIX
940 .unlocked_ioctl = cifs_ioctl,
941 #endif /* CONFIG_CIFS_POSIX */
942 .llseek = cifs_llseek,
943 .setlease = cifs_setlease,
946 const struct file_operations cifs_file_nobrl_ops = {
947 .read = do_sync_read,
948 .write = do_sync_write,
949 .aio_read = generic_file_aio_read,
950 .aio_write = cifs_file_aio_write,
952 .release = cifs_close,
955 .mmap = cifs_file_mmap,
956 .splice_read = generic_file_splice_read,
957 .llseek = cifs_llseek,
958 #ifdef CONFIG_CIFS_POSIX
959 .unlocked_ioctl = cifs_ioctl,
960 #endif /* CONFIG_CIFS_POSIX */
961 .setlease = cifs_setlease,
964 const struct file_operations cifs_file_strict_nobrl_ops = {
965 .read = do_sync_read,
966 .write = do_sync_write,
967 .aio_read = cifs_strict_readv,
968 .aio_write = cifs_strict_writev,
970 .release = cifs_close,
971 .fsync = cifs_strict_fsync,
973 .mmap = cifs_file_strict_mmap,
974 .splice_read = generic_file_splice_read,
975 .llseek = cifs_llseek,
976 #ifdef CONFIG_CIFS_POSIX
977 .unlocked_ioctl = cifs_ioctl,
978 #endif /* CONFIG_CIFS_POSIX */
979 .setlease = cifs_setlease,
982 const struct file_operations cifs_file_direct_nobrl_ops = {
983 /* BB reevaluate whether they can be done with directio, no cache */
984 .read = do_sync_read,
985 .write = do_sync_write,
986 .aio_read = cifs_user_readv,
987 .aio_write = cifs_user_writev,
989 .release = cifs_close,
992 .mmap = cifs_file_mmap,
993 .splice_read = generic_file_splice_read,
994 #ifdef CONFIG_CIFS_POSIX
995 .unlocked_ioctl = cifs_ioctl,
996 #endif /* CONFIG_CIFS_POSIX */
997 .llseek = cifs_llseek,
998 .setlease = cifs_setlease,
1001 const struct file_operations cifs_dir_ops = {
1002 .readdir = cifs_readdir,
1003 .release = cifs_closedir,
1004 .read = generic_read_dir,
1005 .unlocked_ioctl = cifs_ioctl,
1006 .llseek = generic_file_llseek,
1010 cifs_init_once(void *inode)
1012 struct cifsInodeInfo *cifsi = inode;
1014 inode_init_once(&cifsi->vfs_inode);
1015 INIT_LIST_HEAD(&cifsi->lockList);
1019 cifs_init_inodecache(void)
1021 cifs_inode_cachep = kmem_cache_create("cifs_inode_cache",
1022 sizeof(struct cifsInodeInfo),
1023 0, (SLAB_RECLAIM_ACCOUNT|
1026 if (cifs_inode_cachep == NULL)
1033 cifs_destroy_inodecache(void)
1035 kmem_cache_destroy(cifs_inode_cachep);
1039 cifs_init_request_bufs(void)
1041 if (CIFSMaxBufSize < 8192) {
1042 /* Buffer size can not be smaller than 2 * PATH_MAX since maximum
1043 Unicode path name has to fit in any SMB/CIFS path based frames */
1044 CIFSMaxBufSize = 8192;
1045 } else if (CIFSMaxBufSize > 1024*127) {
1046 CIFSMaxBufSize = 1024 * 127;
1048 CIFSMaxBufSize &= 0x1FE00; /* Round size to even 512 byte mult*/
1050 /* cERROR(1, "CIFSMaxBufSize %d 0x%x",CIFSMaxBufSize,CIFSMaxBufSize); */
1051 cifs_req_cachep = kmem_cache_create("cifs_request",
1053 MAX_CIFS_HDR_SIZE, 0,
1054 SLAB_HWCACHE_ALIGN, NULL);
1055 if (cifs_req_cachep == NULL)
1058 if (cifs_min_rcv < 1)
1060 else if (cifs_min_rcv > 64) {
1062 cERROR(1, "cifs_min_rcv set to maximum (64)");
1065 cifs_req_poolp = mempool_create_slab_pool(cifs_min_rcv,
1068 if (cifs_req_poolp == NULL) {
1069 kmem_cache_destroy(cifs_req_cachep);
1072 /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and
1073 almost all handle based requests (but not write response, nor is it
1074 sufficient for path based requests). A smaller size would have
1075 been more efficient (compacting multiple slab items on one 4k page)
1076 for the case in which debug was on, but this larger size allows
1077 more SMBs to use small buffer alloc and is still much more
1078 efficient to alloc 1 per page off the slab compared to 17K (5page)
1079 alloc of large cifs buffers even when page debugging is on */
1080 cifs_sm_req_cachep = kmem_cache_create("cifs_small_rq",
1081 MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN,
1083 if (cifs_sm_req_cachep == NULL) {
1084 mempool_destroy(cifs_req_poolp);
1085 kmem_cache_destroy(cifs_req_cachep);
1089 if (cifs_min_small < 2)
1091 else if (cifs_min_small > 256) {
1092 cifs_min_small = 256;
1093 cFYI(1, "cifs_min_small set to maximum (256)");
1096 cifs_sm_req_poolp = mempool_create_slab_pool(cifs_min_small,
1097 cifs_sm_req_cachep);
1099 if (cifs_sm_req_poolp == NULL) {
1100 mempool_destroy(cifs_req_poolp);
1101 kmem_cache_destroy(cifs_req_cachep);
1102 kmem_cache_destroy(cifs_sm_req_cachep);
1110 cifs_destroy_request_bufs(void)
1112 mempool_destroy(cifs_req_poolp);
1113 kmem_cache_destroy(cifs_req_cachep);
1114 mempool_destroy(cifs_sm_req_poolp);
1115 kmem_cache_destroy(cifs_sm_req_cachep);
1119 cifs_init_mids(void)
1121 cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids",
1122 sizeof(struct mid_q_entry), 0,
1123 SLAB_HWCACHE_ALIGN, NULL);
1124 if (cifs_mid_cachep == NULL)
1127 /* 3 is a reasonable minimum number of simultaneous operations */
1128 cifs_mid_poolp = mempool_create_slab_pool(3, cifs_mid_cachep);
1129 if (cifs_mid_poolp == NULL) {
1130 kmem_cache_destroy(cifs_mid_cachep);
1138 cifs_destroy_mids(void)
1140 mempool_destroy(cifs_mid_poolp);
1141 kmem_cache_destroy(cifs_mid_cachep);
1149 INIT_LIST_HEAD(&cifs_tcp_ses_list);
1150 #ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
1151 INIT_LIST_HEAD(&GlobalDnotifyReqList);
1152 INIT_LIST_HEAD(&GlobalDnotifyRsp_Q);
1153 #endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
1155 * Initialize Global counters
1157 atomic_set(&sesInfoAllocCount, 0);
1158 atomic_set(&tconInfoAllocCount, 0);
1159 atomic_set(&tcpSesAllocCount, 0);
1160 atomic_set(&tcpSesReconnectCount, 0);
1161 atomic_set(&tconInfoReconnectCount, 0);
1163 atomic_set(&bufAllocCount, 0);
1164 atomic_set(&smBufAllocCount, 0);
1165 #ifdef CONFIG_CIFS_STATS2
1166 atomic_set(&totBufAllocCount, 0);
1167 atomic_set(&totSmBufAllocCount, 0);
1168 #endif /* CONFIG_CIFS_STATS2 */
1170 atomic_set(&midCount, 0);
1171 GlobalCurrentXid = 0;
1172 GlobalTotalActiveXid = 0;
1173 GlobalMaxActiveXid = 0;
1174 spin_lock_init(&cifs_tcp_ses_lock);
1175 spin_lock_init(&cifs_file_list_lock);
1176 spin_lock_init(&GlobalMid_Lock);
1178 if (cifs_max_pending < 2) {
1179 cifs_max_pending = 2;
1180 cFYI(1, "cifs_max_pending set to min of 2");
1181 } else if (cifs_max_pending > 256) {
1182 cifs_max_pending = 256;
1183 cFYI(1, "cifs_max_pending set to max of 256");
1186 rc = cifs_fscache_register();
1188 goto out_clean_proc;
1190 rc = cifs_init_inodecache();
1192 goto out_unreg_fscache;
1194 rc = cifs_init_mids();
1196 goto out_destroy_inodecache;
1198 rc = cifs_init_request_bufs();
1200 goto out_destroy_mids;
1202 #ifdef CONFIG_CIFS_UPCALL
1203 rc = register_key_type(&cifs_spnego_key_type);
1205 goto out_destroy_request_bufs;
1206 #endif /* CONFIG_CIFS_UPCALL */
1208 #ifdef CONFIG_CIFS_ACL
1209 rc = init_cifs_idmap();
1211 goto out_register_key_type;
1212 #endif /* CONFIG_CIFS_ACL */
1214 rc = register_filesystem(&cifs_fs_type);
1216 goto out_init_cifs_idmap;
1220 out_init_cifs_idmap:
1221 #ifdef CONFIG_CIFS_ACL
1223 out_register_key_type:
1225 #ifdef CONFIG_CIFS_UPCALL
1226 unregister_key_type(&cifs_spnego_key_type);
1227 out_destroy_request_bufs:
1229 cifs_destroy_request_bufs();
1231 cifs_destroy_mids();
1232 out_destroy_inodecache:
1233 cifs_destroy_inodecache();
1235 cifs_fscache_unregister();
1244 cFYI(DBG2, "exit_cifs");
1246 cifs_fscache_unregister();
1247 #ifdef CONFIG_CIFS_DFS_UPCALL
1248 cifs_dfs_release_automount_timer();
1250 #ifdef CONFIG_CIFS_ACL
1251 cifs_destroy_idmaptrees();
1254 #ifdef CONFIG_CIFS_UPCALL
1255 unregister_key_type(&cifs_spnego_key_type);
1257 unregister_filesystem(&cifs_fs_type);
1258 cifs_destroy_inodecache();
1259 cifs_destroy_mids();
1260 cifs_destroy_request_bufs();
1263 MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>");
1264 MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */
1266 ("VFS to access servers complying with the SNIA CIFS Specification "
1267 "e.g. Samba and Windows");
1268 MODULE_VERSION(CIFS_VERSION);
1269 module_init(init_cifs)
1270 module_exit(exit_cifs)