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");
169 static void cifs_kill_sb(struct super_block *sb)
171 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
173 cifs_umount(cifs_sb);
174 kfree(cifs_sb->mountdata);
175 unload_nls(cifs_sb->local_nls);
180 cifs_statfs(struct dentry *dentry, struct kstatfs *buf)
182 struct super_block *sb = dentry->d_sb;
183 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
184 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
185 int rc = -EOPNOTSUPP;
190 buf->f_type = CIFS_MAGIC_NUMBER;
193 * PATH_MAX may be too long - it would presumably be total path,
194 * but note that some servers (includinng Samba 3) have a shorter
197 * Instead could get the real value via SMB_QUERY_FS_ATTRIBUTE_INFO.
199 buf->f_namelen = PATH_MAX;
200 buf->f_files = 0; /* undefined */
201 buf->f_ffree = 0; /* unlimited */
204 * We could add a second check for a QFS Unix capability bit
206 if ((tcon->ses->capabilities & CAP_UNIX) &&
207 (CIFS_POSIX_EXTENSIONS & le64_to_cpu(tcon->fsUnixInfo.Capability)))
208 rc = CIFSSMBQFSPosixInfo(xid, tcon, buf);
211 * Only need to call the old QFSInfo if failed on newer one,
214 if (rc && (tcon->ses->capabilities & CAP_NT_SMBS))
215 rc = CIFSSMBQFSInfo(xid, tcon, buf);
218 * Some old Windows servers also do not support level 103, retry with
219 * older level one if old server failed the previous call or we
220 * bypassed it because we detected that this was an older LANMAN sess
223 rc = SMBOldQFSInfo(xid, tcon, buf);
229 static int cifs_permission(struct inode *inode, int mask, unsigned int flags)
231 struct cifs_sb_info *cifs_sb;
233 cifs_sb = CIFS_SB(inode->i_sb);
235 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) {
236 if ((mask & MAY_EXEC) && !execute_ok(inode))
240 } else /* file mode might have been restricted at mount time
241 on the client (above and beyond ACL on servers) for
242 servers which do not support setting and viewing mode bits,
243 so allowing client to check permissions is useful */
244 return generic_permission(inode, mask, flags, NULL);
247 static struct kmem_cache *cifs_inode_cachep;
248 static struct kmem_cache *cifs_req_cachep;
249 static struct kmem_cache *cifs_mid_cachep;
250 static struct kmem_cache *cifs_sm_req_cachep;
251 mempool_t *cifs_sm_req_poolp;
252 mempool_t *cifs_req_poolp;
253 mempool_t *cifs_mid_poolp;
255 static struct inode *
256 cifs_alloc_inode(struct super_block *sb)
258 struct cifsInodeInfo *cifs_inode;
259 cifs_inode = kmem_cache_alloc(cifs_inode_cachep, GFP_KERNEL);
262 cifs_inode->cifsAttrs = 0x20; /* default */
263 cifs_inode->time = 0;
264 /* Until the file is open and we have gotten oplock
265 info back from the server, can not assume caching of
266 file data or metadata */
267 cifs_set_oplock_level(cifs_inode, 0);
268 cifs_inode->delete_pending = false;
269 cifs_inode->invalid_mapping = false;
270 cifs_inode->vfs_inode.i_blkbits = 14; /* 2**14 = CIFS_MAX_MSGSIZE */
271 cifs_inode->server_eof = 0;
272 cifs_inode->uniqueid = 0;
273 cifs_inode->createtime = 0;
275 /* Can not set i_flags here - they get immediately overwritten
276 to zero by the VFS */
277 /* cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME;*/
278 INIT_LIST_HEAD(&cifs_inode->openFileList);
279 return &cifs_inode->vfs_inode;
282 static void cifs_i_callback(struct rcu_head *head)
284 struct inode *inode = container_of(head, struct inode, i_rcu);
285 INIT_LIST_HEAD(&inode->i_dentry);
286 kmem_cache_free(cifs_inode_cachep, CIFS_I(inode));
290 cifs_destroy_inode(struct inode *inode)
292 call_rcu(&inode->i_rcu, cifs_i_callback);
296 cifs_evict_inode(struct inode *inode)
298 truncate_inode_pages(&inode->i_data, 0);
299 end_writeback(inode);
300 cifs_fscache_release_inode_cookie(inode);
304 cifs_show_address(struct seq_file *s, struct TCP_Server_Info *server)
306 struct sockaddr_in *sa = (struct sockaddr_in *) &server->dstaddr;
307 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *) &server->dstaddr;
309 seq_printf(s, ",addr=");
311 switch (server->dstaddr.ss_family) {
313 seq_printf(s, "%pI4", &sa->sin_addr.s_addr);
316 seq_printf(s, "%pI6", &sa6->sin6_addr.s6_addr);
317 if (sa6->sin6_scope_id)
318 seq_printf(s, "%%%u", sa6->sin6_scope_id);
321 seq_printf(s, "(unknown)");
326 cifs_show_security(struct seq_file *s, struct TCP_Server_Info *server)
328 seq_printf(s, ",sec=");
330 switch (server->secType) {
332 seq_printf(s, "lanman");
335 seq_printf(s, "ntlmv2");
338 seq_printf(s, "ntlm");
341 seq_printf(s, "krb5");
344 seq_printf(s, "ntlmssp");
347 /* shouldn't ever happen */
348 seq_printf(s, "unknown");
352 if (server->sec_mode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
357 * cifs_show_options() is for displaying mount options in /proc/mounts.
358 * Not all settable options are displayed but most of the important
362 cifs_show_options(struct seq_file *s, struct vfsmount *m)
364 struct cifs_sb_info *cifs_sb = CIFS_SB(m->mnt_sb);
365 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
366 struct sockaddr *srcaddr;
367 srcaddr = (struct sockaddr *)&tcon->ses->server->srcaddr;
369 cifs_show_security(s, tcon->ses->server);
371 seq_printf(s, ",unc=%s", tcon->treeName);
373 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER)
374 seq_printf(s, ",multiuser");
375 else if (tcon->ses->user_name)
376 seq_printf(s, ",username=%s", tcon->ses->user_name);
378 if (tcon->ses->domainName)
379 seq_printf(s, ",domain=%s", tcon->ses->domainName);
381 if (srcaddr->sa_family != AF_UNSPEC) {
382 struct sockaddr_in *saddr4;
383 struct sockaddr_in6 *saddr6;
384 saddr4 = (struct sockaddr_in *)srcaddr;
385 saddr6 = (struct sockaddr_in6 *)srcaddr;
386 if (srcaddr->sa_family == AF_INET6)
387 seq_printf(s, ",srcaddr=%pI6c",
389 else if (srcaddr->sa_family == AF_INET)
390 seq_printf(s, ",srcaddr=%pI4",
391 &saddr4->sin_addr.s_addr);
393 seq_printf(s, ",srcaddr=BAD-AF:%i",
394 (int)(srcaddr->sa_family));
397 seq_printf(s, ",uid=%d", cifs_sb->mnt_uid);
398 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)
399 seq_printf(s, ",forceuid");
401 seq_printf(s, ",noforceuid");
403 seq_printf(s, ",gid=%d", cifs_sb->mnt_gid);
404 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)
405 seq_printf(s, ",forcegid");
407 seq_printf(s, ",noforcegid");
409 cifs_show_address(s, tcon->ses->server);
412 seq_printf(s, ",file_mode=0%o,dir_mode=0%o",
413 cifs_sb->mnt_file_mode,
414 cifs_sb->mnt_dir_mode);
416 seq_printf(s, ",seal");
418 seq_printf(s, ",nocase");
420 seq_printf(s, ",hard");
422 seq_printf(s, ",unix");
424 seq_printf(s, ",nounix");
425 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
426 seq_printf(s, ",posixpaths");
427 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)
428 seq_printf(s, ",setuids");
429 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
430 seq_printf(s, ",serverino");
431 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RWPIDFORWARD)
432 seq_printf(s, ",rwpidforward");
433 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL)
434 seq_printf(s, ",forcemand");
435 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO)
436 seq_printf(s, ",directio");
437 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
438 seq_printf(s, ",nouser_xattr");
439 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR)
440 seq_printf(s, ",mapchars");
441 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)
442 seq_printf(s, ",sfu");
443 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
444 seq_printf(s, ",nobrl");
445 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
446 seq_printf(s, ",cifsacl");
447 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)
448 seq_printf(s, ",dynperm");
449 if (m->mnt_sb->s_flags & MS_POSIXACL)
450 seq_printf(s, ",acl");
451 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS)
452 seq_printf(s, ",mfsymlinks");
453 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_FSCACHE)
454 seq_printf(s, ",fsc");
456 seq_printf(s, ",rsize=%d", cifs_sb->rsize);
457 seq_printf(s, ",wsize=%d", cifs_sb->wsize);
458 /* convert actimeo and display it in seconds */
459 seq_printf(s, ",actimeo=%lu", cifs_sb->actimeo / HZ);
464 static void cifs_umount_begin(struct super_block *sb)
466 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
467 struct cifs_tcon *tcon;
472 tcon = cifs_sb_master_tcon(cifs_sb);
474 spin_lock(&cifs_tcp_ses_lock);
475 if ((tcon->tc_count > 1) || (tcon->tidStatus == CifsExiting)) {
476 /* we have other mounts to same share or we have
477 already tried to force umount this and woken up
478 all waiting network requests, nothing to do */
479 spin_unlock(&cifs_tcp_ses_lock);
481 } else if (tcon->tc_count == 1)
482 tcon->tidStatus = CifsExiting;
483 spin_unlock(&cifs_tcp_ses_lock);
485 /* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */
486 /* cancel_notify_requests(tcon); */
487 if (tcon->ses && tcon->ses->server) {
488 cFYI(1, "wake up tasks now - umount begin not complete");
489 wake_up_all(&tcon->ses->server->request_q);
490 wake_up_all(&tcon->ses->server->response_q);
491 msleep(1); /* yield */
492 /* we have to kick the requests once more */
493 wake_up_all(&tcon->ses->server->response_q);
500 #ifdef CONFIG_CIFS_STATS2
501 static int cifs_show_stats(struct seq_file *s, struct vfsmount *mnt)
508 static int cifs_remount(struct super_block *sb, int *flags, char *data)
510 *flags |= MS_NODIRATIME;
514 static int cifs_drop_inode(struct inode *inode)
516 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
518 /* no serverino => unconditional eviction */
519 return !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) ||
520 generic_drop_inode(inode);
523 static const struct super_operations cifs_super_ops = {
524 .statfs = cifs_statfs,
525 .alloc_inode = cifs_alloc_inode,
526 .destroy_inode = cifs_destroy_inode,
527 .drop_inode = cifs_drop_inode,
528 .evict_inode = cifs_evict_inode,
529 /* .delete_inode = cifs_delete_inode, */ /* Do not need above
530 function unless later we add lazy close of inodes or unless the
531 kernel forgets to call us with the same number of releases (closes)
533 .show_options = cifs_show_options,
534 .umount_begin = cifs_umount_begin,
535 .remount_fs = cifs_remount,
536 #ifdef CONFIG_CIFS_STATS2
537 .show_stats = cifs_show_stats,
542 * Get root dentry from superblock according to prefix path mount option.
543 * Return dentry with refcount + 1 on success and NULL otherwise.
545 static struct dentry *
546 cifs_get_root(struct smb_vol *vol, struct super_block *sb)
551 struct dentry *dparent = NULL, *dchild = NULL, *alias;
552 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
553 unsigned int i, full_len, len;
554 char *full_path = NULL, *pstart;
557 full_path = cifs_build_path_to_root(vol, cifs_sb,
558 cifs_sb_master_tcon(cifs_sb));
559 if (full_path == NULL)
562 cFYI(1, "Get root dentry for %s", full_path);
565 sep = CIFS_DIR_SEP(cifs_sb);
566 dparent = dget(sb->s_root);
567 full_len = strlen(full_path);
568 full_path[full_len] = sep;
569 pstart = full_path + 1;
571 for (i = 1, len = 0; i <= full_len; i++) {
572 if (full_path[i] != sep || !len) {
578 cFYI(1, "get dentry for %s", pstart);
582 name.hash = full_name_hash(pstart, len);
583 dchild = d_lookup(dparent, &name);
584 if (dchild == NULL) {
585 cFYI(1, "not exists");
586 dchild = d_alloc(dparent, &name);
587 if (dchild == NULL) {
594 cFYI(1, "get inode");
595 if (dchild->d_inode == NULL) {
596 cFYI(1, "not exists");
598 if (cifs_sb_master_tcon(CIFS_SB(sb))->unix_ext)
599 rc = cifs_get_inode_info_unix(&inode, full_path,
602 rc = cifs_get_inode_info(&inode, full_path,
603 NULL, sb, xid, NULL);
610 alias = d_materialise_unique(dchild, inode);
621 cFYI(1, "parent %p, child %p", dparent, dchild);
626 pstart = full_path + i + 1;
635 static struct dentry *
636 cifs_do_mount(struct file_system_type *fs_type,
637 int flags, const char *dev_name, void *data)
640 struct super_block *sb;
641 struct cifs_sb_info *cifs_sb;
642 struct smb_vol *volume_info;
643 struct cifs_mnt_data mnt_data;
646 cFYI(1, "Devname: %s flags: %d ", dev_name, flags);
648 rc = cifs_setup_volume_info(&volume_info, (char *)data, dev_name);
652 cifs_sb = kzalloc(sizeof(struct cifs_sb_info), GFP_KERNEL);
653 if (cifs_sb == NULL) {
654 root = ERR_PTR(-ENOMEM);
655 unload_nls(volume_info->local_nls);
659 cifs_sb->mountdata = kstrndup(data, PAGE_SIZE, GFP_KERNEL);
660 if (cifs_sb->mountdata == NULL) {
661 root = ERR_PTR(-ENOMEM);
662 unload_nls(volume_info->local_nls);
667 cifs_setup_cifs_sb(volume_info, cifs_sb);
669 rc = cifs_mount(cifs_sb, volume_info);
671 if (!(flags & MS_SILENT))
672 cERROR(1, "cifs_mount failed w/return code = %d", rc);
674 unload_nls(volume_info->local_nls);
675 kfree(cifs_sb->mountdata);
680 mnt_data.vol = volume_info;
681 mnt_data.cifs_sb = cifs_sb;
682 mnt_data.flags = flags;
684 sb = sget(fs_type, cifs_match_super, set_anon_super, &mnt_data);
687 cifs_umount(cifs_sb);
692 cFYI(1, "Use existing superblock");
693 cifs_umount(cifs_sb);
694 kfree(cifs_sb->mountdata);
695 unload_nls(cifs_sb->local_nls);
701 /* BB should we make this contingent on mount parm? */
702 sb->s_flags |= MS_NODIRATIME | MS_NOATIME;
703 sb->s_fs_info = cifs_sb;
705 rc = cifs_read_super(sb);
711 sb->s_flags |= MS_ACTIVE;
713 root = cifs_get_root(volume_info, sb);
717 cFYI(1, "dentry root is: %p", root);
721 root = cifs_get_root(volume_info, sb);
723 cFYI(1, "dentry root is: %p", root);
727 deactivate_locked_super(sb);
731 kfree(cifs_sb->mountdata);
732 unload_nls(cifs_sb->local_nls);
736 cifs_cleanup_volume_info(&volume_info);
740 static ssize_t cifs_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
741 unsigned long nr_segs, loff_t pos)
743 struct inode *inode = iocb->ki_filp->f_path.dentry->d_inode;
747 written = generic_file_aio_write(iocb, iov, nr_segs, pos);
749 if (CIFS_I(inode)->clientCanCacheAll)
752 rc = filemap_fdatawrite(inode->i_mapping);
754 cFYI(1, "cifs_file_aio_write: %d rc on %p inode", rc, inode);
759 static loff_t cifs_llseek(struct file *file, loff_t offset, int origin)
761 /* origin == SEEK_END => we must revalidate the cached file length */
762 if (origin == SEEK_END) {
764 struct inode *inode = file->f_path.dentry->d_inode;
767 * We need to be sure that all dirty pages are written and the
768 * server has the newest file length.
770 if (!CIFS_I(inode)->clientCanCacheRead && inode->i_mapping &&
771 inode->i_mapping->nrpages != 0) {
772 rc = filemap_fdatawait(inode->i_mapping);
774 mapping_set_error(inode->i_mapping, rc);
779 * Some applications poll for the file length in this strange
780 * way so we must seek to end on non-oplocked files by
781 * setting the revalidate time to zero.
783 CIFS_I(inode)->time = 0;
785 rc = cifs_revalidate_file_attr(file);
789 return generic_file_llseek_unlocked(file, offset, origin);
792 static int cifs_setlease(struct file *file, long arg, struct file_lock **lease)
794 /* note that this is called by vfs setlease with lock_flocks held
795 to protect *lease from going away */
796 struct inode *inode = file->f_path.dentry->d_inode;
797 struct cifsFileInfo *cfile = file->private_data;
799 if (!(S_ISREG(inode->i_mode)))
802 /* check if file is oplocked */
803 if (((arg == F_RDLCK) &&
804 (CIFS_I(inode)->clientCanCacheRead)) ||
806 (CIFS_I(inode)->clientCanCacheAll)))
807 return generic_setlease(file, arg, lease);
808 else if (tlink_tcon(cfile->tlink)->local_lease &&
809 !CIFS_I(inode)->clientCanCacheRead)
810 /* If the server claims to support oplock on this
811 file, then we still need to check oplock even
812 if the local_lease mount option is set, but there
813 are servers which do not support oplock for which
814 this mount option may be useful if the user
815 knows that the file won't be changed on the server
817 return generic_setlease(file, arg, lease);
822 struct file_system_type cifs_fs_type = {
823 .owner = THIS_MODULE,
825 .mount = cifs_do_mount,
826 .kill_sb = cifs_kill_sb,
829 const struct inode_operations cifs_dir_inode_ops = {
830 .create = cifs_create,
831 .lookup = cifs_lookup,
832 .getattr = cifs_getattr,
833 .unlink = cifs_unlink,
834 .link = cifs_hardlink,
837 .rename = cifs_rename,
838 .permission = cifs_permission,
839 /* revalidate:cifs_revalidate, */
840 .setattr = cifs_setattr,
841 .symlink = cifs_symlink,
843 #ifdef CONFIG_CIFS_XATTR
844 .setxattr = cifs_setxattr,
845 .getxattr = cifs_getxattr,
846 .listxattr = cifs_listxattr,
847 .removexattr = cifs_removexattr,
851 const struct inode_operations cifs_file_inode_ops = {
852 /* revalidate:cifs_revalidate, */
853 .setattr = cifs_setattr,
854 .getattr = cifs_getattr, /* do we need this anymore? */
855 .rename = cifs_rename,
856 .permission = cifs_permission,
857 #ifdef CONFIG_CIFS_XATTR
858 .setxattr = cifs_setxattr,
859 .getxattr = cifs_getxattr,
860 .listxattr = cifs_listxattr,
861 .removexattr = cifs_removexattr,
865 const struct inode_operations cifs_symlink_inode_ops = {
866 .readlink = generic_readlink,
867 .follow_link = cifs_follow_link,
868 .put_link = cifs_put_link,
869 .permission = cifs_permission,
870 /* BB add the following two eventually */
871 /* revalidate: cifs_revalidate,
872 setattr: cifs_notify_change, *//* BB do we need notify change */
873 #ifdef CONFIG_CIFS_XATTR
874 .setxattr = cifs_setxattr,
875 .getxattr = cifs_getxattr,
876 .listxattr = cifs_listxattr,
877 .removexattr = cifs_removexattr,
881 const struct file_operations cifs_file_ops = {
882 .read = do_sync_read,
883 .write = do_sync_write,
884 .aio_read = generic_file_aio_read,
885 .aio_write = cifs_file_aio_write,
887 .release = cifs_close,
891 .mmap = cifs_file_mmap,
892 .splice_read = generic_file_splice_read,
893 .llseek = cifs_llseek,
894 #ifdef CONFIG_CIFS_POSIX
895 .unlocked_ioctl = cifs_ioctl,
896 #endif /* CONFIG_CIFS_POSIX */
897 .setlease = cifs_setlease,
900 const struct file_operations cifs_file_strict_ops = {
901 .read = do_sync_read,
902 .write = do_sync_write,
903 .aio_read = cifs_strict_readv,
904 .aio_write = cifs_strict_writev,
906 .release = cifs_close,
908 .fsync = cifs_strict_fsync,
910 .mmap = cifs_file_strict_mmap,
911 .splice_read = generic_file_splice_read,
912 .llseek = cifs_llseek,
913 #ifdef CONFIG_CIFS_POSIX
914 .unlocked_ioctl = cifs_ioctl,
915 #endif /* CONFIG_CIFS_POSIX */
916 .setlease = cifs_setlease,
919 const struct file_operations cifs_file_direct_ops = {
920 /* BB reevaluate whether they can be done with directio, no cache */
921 .read = do_sync_read,
922 .write = do_sync_write,
923 .aio_read = cifs_user_readv,
924 .aio_write = cifs_user_writev,
926 .release = cifs_close,
930 .mmap = cifs_file_mmap,
931 .splice_read = generic_file_splice_read,
932 #ifdef CONFIG_CIFS_POSIX
933 .unlocked_ioctl = cifs_ioctl,
934 #endif /* CONFIG_CIFS_POSIX */
935 .llseek = cifs_llseek,
936 .setlease = cifs_setlease,
939 const struct file_operations cifs_file_nobrl_ops = {
940 .read = do_sync_read,
941 .write = do_sync_write,
942 .aio_read = generic_file_aio_read,
943 .aio_write = cifs_file_aio_write,
945 .release = cifs_close,
948 .mmap = cifs_file_mmap,
949 .splice_read = generic_file_splice_read,
950 .llseek = cifs_llseek,
951 #ifdef CONFIG_CIFS_POSIX
952 .unlocked_ioctl = cifs_ioctl,
953 #endif /* CONFIG_CIFS_POSIX */
954 .setlease = cifs_setlease,
957 const struct file_operations cifs_file_strict_nobrl_ops = {
958 .read = do_sync_read,
959 .write = do_sync_write,
960 .aio_read = cifs_strict_readv,
961 .aio_write = cifs_strict_writev,
963 .release = cifs_close,
964 .fsync = cifs_strict_fsync,
966 .mmap = cifs_file_strict_mmap,
967 .splice_read = generic_file_splice_read,
968 .llseek = cifs_llseek,
969 #ifdef CONFIG_CIFS_POSIX
970 .unlocked_ioctl = cifs_ioctl,
971 #endif /* CONFIG_CIFS_POSIX */
972 .setlease = cifs_setlease,
975 const struct file_operations cifs_file_direct_nobrl_ops = {
976 /* BB reevaluate whether they can be done with directio, no cache */
977 .read = do_sync_read,
978 .write = do_sync_write,
979 .aio_read = cifs_user_readv,
980 .aio_write = cifs_user_writev,
982 .release = cifs_close,
985 .mmap = cifs_file_mmap,
986 .splice_read = generic_file_splice_read,
987 #ifdef CONFIG_CIFS_POSIX
988 .unlocked_ioctl = cifs_ioctl,
989 #endif /* CONFIG_CIFS_POSIX */
990 .llseek = cifs_llseek,
991 .setlease = cifs_setlease,
994 const struct file_operations cifs_dir_ops = {
995 .readdir = cifs_readdir,
996 .release = cifs_closedir,
997 .read = generic_read_dir,
998 .unlocked_ioctl = cifs_ioctl,
999 .llseek = generic_file_llseek,
1003 cifs_init_once(void *inode)
1005 struct cifsInodeInfo *cifsi = inode;
1007 inode_init_once(&cifsi->vfs_inode);
1008 INIT_LIST_HEAD(&cifsi->lockList);
1012 cifs_init_inodecache(void)
1014 cifs_inode_cachep = kmem_cache_create("cifs_inode_cache",
1015 sizeof(struct cifsInodeInfo),
1016 0, (SLAB_RECLAIM_ACCOUNT|
1019 if (cifs_inode_cachep == NULL)
1026 cifs_destroy_inodecache(void)
1028 kmem_cache_destroy(cifs_inode_cachep);
1032 cifs_init_request_bufs(void)
1034 if (CIFSMaxBufSize < 8192) {
1035 /* Buffer size can not be smaller than 2 * PATH_MAX since maximum
1036 Unicode path name has to fit in any SMB/CIFS path based frames */
1037 CIFSMaxBufSize = 8192;
1038 } else if (CIFSMaxBufSize > 1024*127) {
1039 CIFSMaxBufSize = 1024 * 127;
1041 CIFSMaxBufSize &= 0x1FE00; /* Round size to even 512 byte mult*/
1043 /* cERROR(1, "CIFSMaxBufSize %d 0x%x",CIFSMaxBufSize,CIFSMaxBufSize); */
1044 cifs_req_cachep = kmem_cache_create("cifs_request",
1046 MAX_CIFS_HDR_SIZE, 0,
1047 SLAB_HWCACHE_ALIGN, NULL);
1048 if (cifs_req_cachep == NULL)
1051 if (cifs_min_rcv < 1)
1053 else if (cifs_min_rcv > 64) {
1055 cERROR(1, "cifs_min_rcv set to maximum (64)");
1058 cifs_req_poolp = mempool_create_slab_pool(cifs_min_rcv,
1061 if (cifs_req_poolp == NULL) {
1062 kmem_cache_destroy(cifs_req_cachep);
1065 /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and
1066 almost all handle based requests (but not write response, nor is it
1067 sufficient for path based requests). A smaller size would have
1068 been more efficient (compacting multiple slab items on one 4k page)
1069 for the case in which debug was on, but this larger size allows
1070 more SMBs to use small buffer alloc and is still much more
1071 efficient to alloc 1 per page off the slab compared to 17K (5page)
1072 alloc of large cifs buffers even when page debugging is on */
1073 cifs_sm_req_cachep = kmem_cache_create("cifs_small_rq",
1074 MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN,
1076 if (cifs_sm_req_cachep == NULL) {
1077 mempool_destroy(cifs_req_poolp);
1078 kmem_cache_destroy(cifs_req_cachep);
1082 if (cifs_min_small < 2)
1084 else if (cifs_min_small > 256) {
1085 cifs_min_small = 256;
1086 cFYI(1, "cifs_min_small set to maximum (256)");
1089 cifs_sm_req_poolp = mempool_create_slab_pool(cifs_min_small,
1090 cifs_sm_req_cachep);
1092 if (cifs_sm_req_poolp == NULL) {
1093 mempool_destroy(cifs_req_poolp);
1094 kmem_cache_destroy(cifs_req_cachep);
1095 kmem_cache_destroy(cifs_sm_req_cachep);
1103 cifs_destroy_request_bufs(void)
1105 mempool_destroy(cifs_req_poolp);
1106 kmem_cache_destroy(cifs_req_cachep);
1107 mempool_destroy(cifs_sm_req_poolp);
1108 kmem_cache_destroy(cifs_sm_req_cachep);
1112 cifs_init_mids(void)
1114 cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids",
1115 sizeof(struct mid_q_entry), 0,
1116 SLAB_HWCACHE_ALIGN, NULL);
1117 if (cifs_mid_cachep == NULL)
1120 /* 3 is a reasonable minimum number of simultaneous operations */
1121 cifs_mid_poolp = mempool_create_slab_pool(3, cifs_mid_cachep);
1122 if (cifs_mid_poolp == NULL) {
1123 kmem_cache_destroy(cifs_mid_cachep);
1131 cifs_destroy_mids(void)
1133 mempool_destroy(cifs_mid_poolp);
1134 kmem_cache_destroy(cifs_mid_cachep);
1142 INIT_LIST_HEAD(&cifs_tcp_ses_list);
1143 #ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
1144 INIT_LIST_HEAD(&GlobalDnotifyReqList);
1145 INIT_LIST_HEAD(&GlobalDnotifyRsp_Q);
1146 #endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
1148 * Initialize Global counters
1150 atomic_set(&sesInfoAllocCount, 0);
1151 atomic_set(&tconInfoAllocCount, 0);
1152 atomic_set(&tcpSesAllocCount, 0);
1153 atomic_set(&tcpSesReconnectCount, 0);
1154 atomic_set(&tconInfoReconnectCount, 0);
1156 atomic_set(&bufAllocCount, 0);
1157 atomic_set(&smBufAllocCount, 0);
1158 #ifdef CONFIG_CIFS_STATS2
1159 atomic_set(&totBufAllocCount, 0);
1160 atomic_set(&totSmBufAllocCount, 0);
1161 #endif /* CONFIG_CIFS_STATS2 */
1163 atomic_set(&midCount, 0);
1164 GlobalCurrentXid = 0;
1165 GlobalTotalActiveXid = 0;
1166 GlobalMaxActiveXid = 0;
1167 spin_lock_init(&cifs_tcp_ses_lock);
1168 spin_lock_init(&cifs_file_list_lock);
1169 spin_lock_init(&GlobalMid_Lock);
1171 if (cifs_max_pending < 2) {
1172 cifs_max_pending = 2;
1173 cFYI(1, "cifs_max_pending set to min of 2");
1174 } else if (cifs_max_pending > 256) {
1175 cifs_max_pending = 256;
1176 cFYI(1, "cifs_max_pending set to max of 256");
1179 rc = cifs_fscache_register();
1181 goto out_clean_proc;
1183 rc = cifs_init_inodecache();
1185 goto out_unreg_fscache;
1187 rc = cifs_init_mids();
1189 goto out_destroy_inodecache;
1191 rc = cifs_init_request_bufs();
1193 goto out_destroy_mids;
1195 #ifdef CONFIG_CIFS_UPCALL
1196 rc = register_key_type(&cifs_spnego_key_type);
1198 goto out_destroy_request_bufs;
1199 #endif /* CONFIG_CIFS_UPCALL */
1201 #ifdef CONFIG_CIFS_ACL
1202 rc = init_cifs_idmap();
1204 goto out_register_key_type;
1205 #endif /* CONFIG_CIFS_ACL */
1207 rc = register_filesystem(&cifs_fs_type);
1209 goto out_init_cifs_idmap;
1213 out_init_cifs_idmap:
1214 #ifdef CONFIG_CIFS_ACL
1216 out_register_key_type:
1218 #ifdef CONFIG_CIFS_UPCALL
1219 unregister_key_type(&cifs_spnego_key_type);
1220 out_destroy_request_bufs:
1222 cifs_destroy_request_bufs();
1224 cifs_destroy_mids();
1225 out_destroy_inodecache:
1226 cifs_destroy_inodecache();
1228 cifs_fscache_unregister();
1237 cFYI(DBG2, "exit_cifs");
1239 cifs_fscache_unregister();
1240 #ifdef CONFIG_CIFS_DFS_UPCALL
1241 cifs_dfs_release_automount_timer();
1243 #ifdef CONFIG_CIFS_ACL
1244 cifs_destroy_idmaptrees();
1247 #ifdef CONFIG_CIFS_UPCALL
1248 unregister_key_type(&cifs_spnego_key_type);
1250 unregister_filesystem(&cifs_fs_type);
1251 cifs_destroy_inodecache();
1252 cifs_destroy_mids();
1253 cifs_destroy_request_bufs();
1256 MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>");
1257 MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */
1259 ("VFS to access servers complying with the SNIA CIFS Specification "
1260 "e.g. Samba and Windows");
1261 MODULE_VERSION(CIFS_VERSION);
1262 module_init(init_cifs)
1263 module_exit(exit_cifs)