4 * Copyright (C) International Business Machines Corp., 2002,2008
5 * Author(s): Steve French (sfrench@us.ibm.com)
7 * Common Internet FileSystem (CIFS) client
9 * This library is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU Lesser General Public License as published
11 * by the Free Software Foundation; either version 2.1 of the License, or
12 * (at your option) any later version.
14 * This library is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
17 * the GNU Lesser General Public License for more details.
19 * You should have received a copy of the GNU Lesser General Public License
20 * along with this library; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 /* Note that BB means BUGBUG (ie something to fix eventually) */
26 #include <linux/module.h>
28 #include <linux/mount.h>
29 #include <linux/slab.h>
30 #include <linux/init.h>
31 #include <linux/list.h>
32 #include <linux/seq_file.h>
33 #include <linux/vfs.h>
34 #include <linux/mempool.h>
35 #include <linux/delay.h>
36 #include <linux/kthread.h>
37 #include <linux/freezer.h>
38 #include <linux/namei.h>
42 #define DECLARE_GLOBALS_HERE
44 #include "cifsproto.h"
45 #include "cifs_debug.h"
46 #include "cifs_fs_sb.h"
48 #include <linux/key-type.h>
49 #include "cifs_spnego.h"
51 #define CIFS_MAGIC_NUMBER 0xFF534D42 /* the first four bytes of SMB PDUs */
56 bool enable_oplocks = true;
57 unsigned int linuxExtEnabled = 1;
58 unsigned int lookupCacheEnabled = 1;
59 unsigned int multiuser_mount = 0;
60 unsigned int global_secflags = CIFSSEC_DEF;
61 /* unsigned int ntlmv2_support = 0; */
62 unsigned int sign_CIFS_PDUs = 1;
63 static const struct super_operations cifs_super_ops;
64 unsigned int CIFSMaxBufSize = CIFS_MAX_MSGSIZE;
65 module_param(CIFSMaxBufSize, int, 0);
66 MODULE_PARM_DESC(CIFSMaxBufSize, "Network buffer size (not including header). "
67 "Default: 16384 Range: 8192 to 130048");
68 unsigned int cifs_min_rcv = CIFS_MIN_RCV_POOL;
69 module_param(cifs_min_rcv, int, 0);
70 MODULE_PARM_DESC(cifs_min_rcv, "Network buffers in pool. Default: 4 Range: "
72 unsigned int cifs_min_small = 30;
73 module_param(cifs_min_small, int, 0);
74 MODULE_PARM_DESC(cifs_min_small, "Small network buffers in pool. Default: 30 "
76 unsigned int cifs_max_pending = CIFS_MAX_REQ;
77 module_param(cifs_max_pending, int, 0444);
78 MODULE_PARM_DESC(cifs_max_pending, "Simultaneous requests to server. "
79 "Default: 32767 Range: 2 to 32767.");
80 module_param(enable_oplocks, bool, 0644);
81 MODULE_PARM_DESC(enable_oplocks, "Enable or disable oplocks (bool). Default:"
84 extern mempool_t *cifs_sm_req_poolp;
85 extern mempool_t *cifs_req_poolp;
86 extern mempool_t *cifs_mid_poolp;
89 cifs_read_super(struct super_block *sb)
92 struct cifs_sb_info *cifs_sb;
95 cifs_sb = CIFS_SB(sb);
97 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIXACL)
98 sb->s_flags |= MS_POSIXACL;
100 if (cifs_sb_master_tcon(cifs_sb)->ses->capabilities & CAP_LARGE_FILES)
101 sb->s_maxbytes = MAX_LFS_FILESIZE;
103 sb->s_maxbytes = MAX_NON_LFS;
105 /* BB FIXME fix time_gran to be larger for LANMAN sessions */
106 sb->s_time_gran = 100;
108 sb->s_magic = CIFS_MAGIC_NUMBER;
109 sb->s_op = &cifs_super_ops;
110 sb->s_bdi = &cifs_sb->bdi;
111 sb->s_blocksize = CIFS_MAX_MSGSIZE;
112 sb->s_blocksize_bits = 14; /* default 2**14 = CIFS_MAX_MSGSIZE */
113 inode = cifs_root_iget(sb);
121 sb->s_root = d_alloc_root(inode);
128 /* do that *after* d_alloc_root() - we want NULL ->d_op for root here */
129 if (cifs_sb_master_tcon(cifs_sb)->nocase)
130 sb->s_d_op = &cifs_ci_dentry_ops;
132 sb->s_d_op = &cifs_dentry_ops;
134 #ifdef CONFIG_CIFS_NFSD_EXPORT
135 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
136 cFYI(1, "export ops supported");
137 sb->s_export_op = &cifs_export_ops;
139 #endif /* CONFIG_CIFS_NFSD_EXPORT */
144 cERROR(1, "cifs_read_super: get root inode failed");
151 static void cifs_kill_sb(struct super_block *sb)
153 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
155 cifs_umount(cifs_sb);
159 cifs_statfs(struct dentry *dentry, struct kstatfs *buf)
161 struct super_block *sb = dentry->d_sb;
162 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
163 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
164 int rc = -EOPNOTSUPP;
169 buf->f_type = CIFS_MAGIC_NUMBER;
172 * PATH_MAX may be too long - it would presumably be total path,
173 * but note that some servers (includinng Samba 3) have a shorter
176 * Instead could get the real value via SMB_QUERY_FS_ATTRIBUTE_INFO.
178 buf->f_namelen = PATH_MAX;
179 buf->f_files = 0; /* undefined */
180 buf->f_ffree = 0; /* unlimited */
183 * We could add a second check for a QFS Unix capability bit
185 if ((tcon->ses->capabilities & CAP_UNIX) &&
186 (CIFS_POSIX_EXTENSIONS & le64_to_cpu(tcon->fsUnixInfo.Capability)))
187 rc = CIFSSMBQFSPosixInfo(xid, tcon, buf);
190 * Only need to call the old QFSInfo if failed on newer one,
193 if (rc && (tcon->ses->capabilities & CAP_NT_SMBS))
194 rc = CIFSSMBQFSInfo(xid, tcon, buf);
197 * Some old Windows servers also do not support level 103, retry with
198 * older level one if old server failed the previous call or we
199 * bypassed it because we detected that this was an older LANMAN sess
202 rc = SMBOldQFSInfo(xid, tcon, buf);
208 static int cifs_permission(struct inode *inode, int mask)
210 struct cifs_sb_info *cifs_sb;
212 cifs_sb = CIFS_SB(inode->i_sb);
214 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) {
215 if ((mask & MAY_EXEC) && !execute_ok(inode))
219 } else /* file mode might have been restricted at mount time
220 on the client (above and beyond ACL on servers) for
221 servers which do not support setting and viewing mode bits,
222 so allowing client to check permissions is useful */
223 return generic_permission(inode, mask);
226 static struct kmem_cache *cifs_inode_cachep;
227 static struct kmem_cache *cifs_req_cachep;
228 static struct kmem_cache *cifs_mid_cachep;
229 static struct kmem_cache *cifs_sm_req_cachep;
230 mempool_t *cifs_sm_req_poolp;
231 mempool_t *cifs_req_poolp;
232 mempool_t *cifs_mid_poolp;
234 static struct inode *
235 cifs_alloc_inode(struct super_block *sb)
237 struct cifsInodeInfo *cifs_inode;
238 cifs_inode = kmem_cache_alloc(cifs_inode_cachep, GFP_KERNEL);
241 cifs_inode->cifsAttrs = 0x20; /* default */
242 cifs_inode->time = 0;
243 /* Until the file is open and we have gotten oplock
244 info back from the server, can not assume caching of
245 file data or metadata */
246 cifs_set_oplock_level(cifs_inode, 0);
247 cifs_inode->delete_pending = false;
248 cifs_inode->invalid_mapping = false;
249 cifs_inode->vfs_inode.i_blkbits = 14; /* 2**14 = CIFS_MAX_MSGSIZE */
250 cifs_inode->server_eof = 0;
251 cifs_inode->uniqueid = 0;
252 cifs_inode->createtime = 0;
254 /* Can not set i_flags here - they get immediately overwritten
255 to zero by the VFS */
256 /* cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME;*/
257 INIT_LIST_HEAD(&cifs_inode->openFileList);
258 return &cifs_inode->vfs_inode;
261 static void cifs_i_callback(struct rcu_head *head)
263 struct inode *inode = container_of(head, struct inode, i_rcu);
264 INIT_LIST_HEAD(&inode->i_dentry);
265 kmem_cache_free(cifs_inode_cachep, CIFS_I(inode));
269 cifs_destroy_inode(struct inode *inode)
271 call_rcu(&inode->i_rcu, cifs_i_callback);
275 cifs_evict_inode(struct inode *inode)
277 truncate_inode_pages(&inode->i_data, 0);
278 end_writeback(inode);
279 cifs_fscache_release_inode_cookie(inode);
283 cifs_show_address(struct seq_file *s, struct TCP_Server_Info *server)
285 struct sockaddr_in *sa = (struct sockaddr_in *) &server->dstaddr;
286 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *) &server->dstaddr;
288 seq_printf(s, ",addr=");
290 switch (server->dstaddr.ss_family) {
292 seq_printf(s, "%pI4", &sa->sin_addr.s_addr);
295 seq_printf(s, "%pI6", &sa6->sin6_addr.s6_addr);
296 if (sa6->sin6_scope_id)
297 seq_printf(s, "%%%u", sa6->sin6_scope_id);
300 seq_printf(s, "(unknown)");
305 cifs_show_security(struct seq_file *s, struct TCP_Server_Info *server)
307 seq_printf(s, ",sec=");
309 switch (server->secType) {
311 seq_printf(s, "lanman");
314 seq_printf(s, "ntlmv2");
317 seq_printf(s, "ntlm");
320 seq_printf(s, "krb5");
323 seq_printf(s, "ntlmssp");
326 /* shouldn't ever happen */
327 seq_printf(s, "unknown");
331 if (server->sec_mode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
336 * cifs_show_options() is for displaying mount options in /proc/mounts.
337 * Not all settable options are displayed but most of the important
341 cifs_show_options(struct seq_file *s, struct dentry *root)
343 struct cifs_sb_info *cifs_sb = CIFS_SB(root->d_sb);
344 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
345 struct sockaddr *srcaddr;
346 srcaddr = (struct sockaddr *)&tcon->ses->server->srcaddr;
348 cifs_show_security(s, tcon->ses->server);
350 seq_printf(s, ",unc=%s", tcon->treeName);
352 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER)
353 seq_printf(s, ",multiuser");
354 else if (tcon->ses->user_name)
355 seq_printf(s, ",username=%s", tcon->ses->user_name);
357 if (tcon->ses->domainName)
358 seq_printf(s, ",domain=%s", tcon->ses->domainName);
360 if (srcaddr->sa_family != AF_UNSPEC) {
361 struct sockaddr_in *saddr4;
362 struct sockaddr_in6 *saddr6;
363 saddr4 = (struct sockaddr_in *)srcaddr;
364 saddr6 = (struct sockaddr_in6 *)srcaddr;
365 if (srcaddr->sa_family == AF_INET6)
366 seq_printf(s, ",srcaddr=%pI6c",
368 else if (srcaddr->sa_family == AF_INET)
369 seq_printf(s, ",srcaddr=%pI4",
370 &saddr4->sin_addr.s_addr);
372 seq_printf(s, ",srcaddr=BAD-AF:%i",
373 (int)(srcaddr->sa_family));
376 seq_printf(s, ",uid=%d", cifs_sb->mnt_uid);
377 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)
378 seq_printf(s, ",forceuid");
380 seq_printf(s, ",noforceuid");
382 seq_printf(s, ",gid=%d", cifs_sb->mnt_gid);
383 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)
384 seq_printf(s, ",forcegid");
386 seq_printf(s, ",noforcegid");
388 cifs_show_address(s, tcon->ses->server);
391 seq_printf(s, ",file_mode=0%ho,dir_mode=0%ho",
392 cifs_sb->mnt_file_mode,
393 cifs_sb->mnt_dir_mode);
395 seq_printf(s, ",seal");
397 seq_printf(s, ",nocase");
399 seq_printf(s, ",hard");
401 seq_printf(s, ",unix");
403 seq_printf(s, ",nounix");
404 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
405 seq_printf(s, ",posixpaths");
406 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)
407 seq_printf(s, ",setuids");
408 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
409 seq_printf(s, ",serverino");
410 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RWPIDFORWARD)
411 seq_printf(s, ",rwpidforward");
412 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL)
413 seq_printf(s, ",forcemand");
414 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO)
415 seq_printf(s, ",directio");
416 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
417 seq_printf(s, ",nouser_xattr");
418 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR)
419 seq_printf(s, ",mapchars");
420 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)
421 seq_printf(s, ",sfu");
422 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
423 seq_printf(s, ",nobrl");
424 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
425 seq_printf(s, ",cifsacl");
426 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)
427 seq_printf(s, ",dynperm");
428 if (root->d_sb->s_flags & MS_POSIXACL)
429 seq_printf(s, ",acl");
430 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS)
431 seq_printf(s, ",mfsymlinks");
432 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_FSCACHE)
433 seq_printf(s, ",fsc");
434 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOSSYNC)
435 seq_printf(s, ",nostrictsync");
436 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM)
437 seq_printf(s, ",noperm");
438 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_STRICT_IO)
439 seq_printf(s, ",strictcache");
441 seq_printf(s, ",rsize=%d", cifs_sb->rsize);
442 seq_printf(s, ",wsize=%d", cifs_sb->wsize);
443 /* convert actimeo and display it in seconds */
444 seq_printf(s, ",actimeo=%lu", cifs_sb->actimeo / HZ);
449 static void cifs_umount_begin(struct super_block *sb)
451 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
452 struct cifs_tcon *tcon;
457 tcon = cifs_sb_master_tcon(cifs_sb);
459 spin_lock(&cifs_tcp_ses_lock);
460 if ((tcon->tc_count > 1) || (tcon->tidStatus == CifsExiting)) {
461 /* we have other mounts to same share or we have
462 already tried to force umount this and woken up
463 all waiting network requests, nothing to do */
464 spin_unlock(&cifs_tcp_ses_lock);
466 } else if (tcon->tc_count == 1)
467 tcon->tidStatus = CifsExiting;
468 spin_unlock(&cifs_tcp_ses_lock);
470 /* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */
471 /* cancel_notify_requests(tcon); */
472 if (tcon->ses && tcon->ses->server) {
473 cFYI(1, "wake up tasks now - umount begin not complete");
474 wake_up_all(&tcon->ses->server->request_q);
475 wake_up_all(&tcon->ses->server->response_q);
476 msleep(1); /* yield */
477 /* we have to kick the requests once more */
478 wake_up_all(&tcon->ses->server->response_q);
485 #ifdef CONFIG_CIFS_STATS2
486 static int cifs_show_stats(struct seq_file *s, struct dentry *root)
493 static int cifs_remount(struct super_block *sb, int *flags, char *data)
495 *flags |= MS_NODIRATIME;
499 static int cifs_drop_inode(struct inode *inode)
501 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
503 /* no serverino => unconditional eviction */
504 return !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) ||
505 generic_drop_inode(inode);
508 static const struct super_operations cifs_super_ops = {
509 .statfs = cifs_statfs,
510 .alloc_inode = cifs_alloc_inode,
511 .destroy_inode = cifs_destroy_inode,
512 .drop_inode = cifs_drop_inode,
513 .evict_inode = cifs_evict_inode,
514 /* .delete_inode = cifs_delete_inode, */ /* Do not need above
515 function unless later we add lazy close of inodes or unless the
516 kernel forgets to call us with the same number of releases (closes)
518 .show_options = cifs_show_options,
519 .umount_begin = cifs_umount_begin,
520 .remount_fs = cifs_remount,
521 #ifdef CONFIG_CIFS_STATS2
522 .show_stats = cifs_show_stats,
527 * Get root dentry from superblock according to prefix path mount option.
528 * Return dentry with refcount + 1 on success and NULL otherwise.
530 static struct dentry *
531 cifs_get_root(struct smb_vol *vol, struct super_block *sb)
533 struct dentry *dentry;
534 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
535 char *full_path = NULL;
539 full_path = cifs_build_path_to_root(vol, cifs_sb,
540 cifs_sb_master_tcon(cifs_sb));
541 if (full_path == NULL)
542 return ERR_PTR(-ENOMEM);
544 cFYI(1, "Get root dentry for %s", full_path);
546 sep = CIFS_DIR_SEP(cifs_sb);
547 dentry = dget(sb->s_root);
551 struct inode *dir = dentry->d_inode;
552 struct dentry *child;
556 dentry = ERR_PTR(-ENOENT);
560 /* skip separators */
567 while (*s && *s != sep)
570 mutex_lock(&dir->i_mutex);
571 child = lookup_one_len(p, dentry, s - p);
572 mutex_unlock(&dir->i_mutex);
575 } while (!IS_ERR(dentry));
580 static int cifs_set_super(struct super_block *sb, void *data)
582 struct cifs_mnt_data *mnt_data = data;
583 sb->s_fs_info = mnt_data->cifs_sb;
584 return set_anon_super(sb, NULL);
587 static struct dentry *
588 cifs_do_mount(struct file_system_type *fs_type,
589 int flags, const char *dev_name, void *data)
592 struct super_block *sb;
593 struct cifs_sb_info *cifs_sb;
594 struct smb_vol *volume_info;
595 struct cifs_mnt_data mnt_data;
598 cFYI(1, "Devname: %s flags: %d ", dev_name, flags);
600 volume_info = cifs_get_volume_info((char *)data, dev_name);
601 if (IS_ERR(volume_info))
602 return ERR_CAST(volume_info);
604 cifs_sb = kzalloc(sizeof(struct cifs_sb_info), GFP_KERNEL);
605 if (cifs_sb == NULL) {
606 root = ERR_PTR(-ENOMEM);
610 cifs_sb->mountdata = kstrndup(data, PAGE_SIZE, GFP_KERNEL);
611 if (cifs_sb->mountdata == NULL) {
612 root = ERR_PTR(-ENOMEM);
616 cifs_setup_cifs_sb(volume_info, cifs_sb);
618 rc = cifs_mount(cifs_sb, volume_info);
620 if (!(flags & MS_SILENT))
621 cERROR(1, "cifs_mount failed w/return code = %d", rc);
626 mnt_data.vol = volume_info;
627 mnt_data.cifs_sb = cifs_sb;
628 mnt_data.flags = flags;
630 sb = sget(fs_type, cifs_match_super, cifs_set_super, &mnt_data);
633 cifs_umount(cifs_sb);
638 cFYI(1, "Use existing superblock");
639 cifs_umount(cifs_sb);
642 /* BB should we make this contingent on mount parm? */
643 sb->s_flags |= MS_NODIRATIME | MS_NOATIME;
645 rc = cifs_read_super(sb);
651 sb->s_flags |= MS_ACTIVE;
654 root = cifs_get_root(volume_info, sb);
658 cFYI(1, "dentry root is: %p", root);
662 deactivate_locked_super(sb);
664 cifs_cleanup_volume_info(volume_info);
668 kfree(cifs_sb->mountdata);
672 unload_nls(volume_info->local_nls);
676 static ssize_t cifs_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
677 unsigned long nr_segs, loff_t pos)
679 struct inode *inode = iocb->ki_filp->f_path.dentry->d_inode;
683 written = generic_file_aio_write(iocb, iov, nr_segs, pos);
685 if (CIFS_I(inode)->clientCanCacheAll)
688 rc = filemap_fdatawrite(inode->i_mapping);
690 cFYI(1, "cifs_file_aio_write: %d rc on %p inode", rc, inode);
695 static loff_t cifs_llseek(struct file *file, loff_t offset, int origin)
698 * origin == SEEK_END || SEEK_DATA || SEEK_HOLE => we must revalidate
699 * the cached file length
701 if (origin != SEEK_SET || origin != SEEK_CUR) {
703 struct inode *inode = file->f_path.dentry->d_inode;
706 * We need to be sure that all dirty pages are written and the
707 * server has the newest file length.
709 if (!CIFS_I(inode)->clientCanCacheRead && inode->i_mapping &&
710 inode->i_mapping->nrpages != 0) {
711 rc = filemap_fdatawait(inode->i_mapping);
713 mapping_set_error(inode->i_mapping, rc);
718 * Some applications poll for the file length in this strange
719 * way so we must seek to end on non-oplocked files by
720 * setting the revalidate time to zero.
722 CIFS_I(inode)->time = 0;
724 rc = cifs_revalidate_file_attr(file);
728 return generic_file_llseek(file, offset, origin);
731 static int cifs_setlease(struct file *file, long arg, struct file_lock **lease)
733 /* note that this is called by vfs setlease with lock_flocks held
734 to protect *lease from going away */
735 struct inode *inode = file->f_path.dentry->d_inode;
736 struct cifsFileInfo *cfile = file->private_data;
738 if (!(S_ISREG(inode->i_mode)))
741 /* check if file is oplocked */
742 if (((arg == F_RDLCK) &&
743 (CIFS_I(inode)->clientCanCacheRead)) ||
745 (CIFS_I(inode)->clientCanCacheAll)))
746 return generic_setlease(file, arg, lease);
747 else if (tlink_tcon(cfile->tlink)->local_lease &&
748 !CIFS_I(inode)->clientCanCacheRead)
749 /* If the server claims to support oplock on this
750 file, then we still need to check oplock even
751 if the local_lease mount option is set, but there
752 are servers which do not support oplock for which
753 this mount option may be useful if the user
754 knows that the file won't be changed on the server
756 return generic_setlease(file, arg, lease);
761 struct file_system_type cifs_fs_type = {
762 .owner = THIS_MODULE,
764 .mount = cifs_do_mount,
765 .kill_sb = cifs_kill_sb,
768 const struct inode_operations cifs_dir_inode_ops = {
769 .create = cifs_create,
770 .lookup = cifs_lookup,
771 .getattr = cifs_getattr,
772 .unlink = cifs_unlink,
773 .link = cifs_hardlink,
776 .rename = cifs_rename,
777 .permission = cifs_permission,
778 /* revalidate:cifs_revalidate, */
779 .setattr = cifs_setattr,
780 .symlink = cifs_symlink,
782 #ifdef CONFIG_CIFS_XATTR
783 .setxattr = cifs_setxattr,
784 .getxattr = cifs_getxattr,
785 .listxattr = cifs_listxattr,
786 .removexattr = cifs_removexattr,
790 const struct inode_operations cifs_file_inode_ops = {
791 /* revalidate:cifs_revalidate, */
792 .setattr = cifs_setattr,
793 .getattr = cifs_getattr, /* do we need this anymore? */
794 .rename = cifs_rename,
795 .permission = cifs_permission,
796 #ifdef CONFIG_CIFS_XATTR
797 .setxattr = cifs_setxattr,
798 .getxattr = cifs_getxattr,
799 .listxattr = cifs_listxattr,
800 .removexattr = cifs_removexattr,
804 const struct inode_operations cifs_symlink_inode_ops = {
805 .readlink = generic_readlink,
806 .follow_link = cifs_follow_link,
807 .put_link = cifs_put_link,
808 .permission = cifs_permission,
809 /* BB add the following two eventually */
810 /* revalidate: cifs_revalidate,
811 setattr: cifs_notify_change, *//* BB do we need notify change */
812 #ifdef CONFIG_CIFS_XATTR
813 .setxattr = cifs_setxattr,
814 .getxattr = cifs_getxattr,
815 .listxattr = cifs_listxattr,
816 .removexattr = cifs_removexattr,
820 const struct file_operations cifs_file_ops = {
821 .read = do_sync_read,
822 .write = do_sync_write,
823 .aio_read = generic_file_aio_read,
824 .aio_write = cifs_file_aio_write,
826 .release = cifs_close,
830 .mmap = cifs_file_mmap,
831 .splice_read = generic_file_splice_read,
832 .llseek = cifs_llseek,
833 #ifdef CONFIG_CIFS_POSIX
834 .unlocked_ioctl = cifs_ioctl,
835 #endif /* CONFIG_CIFS_POSIX */
836 .setlease = cifs_setlease,
839 const struct file_operations cifs_file_strict_ops = {
840 .read = do_sync_read,
841 .write = do_sync_write,
842 .aio_read = cifs_strict_readv,
843 .aio_write = cifs_strict_writev,
845 .release = cifs_close,
847 .fsync = cifs_strict_fsync,
849 .mmap = cifs_file_strict_mmap,
850 .splice_read = generic_file_splice_read,
851 .llseek = cifs_llseek,
852 #ifdef CONFIG_CIFS_POSIX
853 .unlocked_ioctl = cifs_ioctl,
854 #endif /* CONFIG_CIFS_POSIX */
855 .setlease = cifs_setlease,
858 const struct file_operations cifs_file_direct_ops = {
859 /* BB reevaluate whether they can be done with directio, no cache */
860 .read = do_sync_read,
861 .write = do_sync_write,
862 .aio_read = cifs_user_readv,
863 .aio_write = cifs_user_writev,
865 .release = cifs_close,
869 .mmap = cifs_file_mmap,
870 .splice_read = generic_file_splice_read,
871 #ifdef CONFIG_CIFS_POSIX
872 .unlocked_ioctl = cifs_ioctl,
873 #endif /* CONFIG_CIFS_POSIX */
874 .llseek = cifs_llseek,
875 .setlease = cifs_setlease,
878 const struct file_operations cifs_file_nobrl_ops = {
879 .read = do_sync_read,
880 .write = do_sync_write,
881 .aio_read = generic_file_aio_read,
882 .aio_write = cifs_file_aio_write,
884 .release = cifs_close,
887 .mmap = cifs_file_mmap,
888 .splice_read = generic_file_splice_read,
889 .llseek = cifs_llseek,
890 #ifdef CONFIG_CIFS_POSIX
891 .unlocked_ioctl = cifs_ioctl,
892 #endif /* CONFIG_CIFS_POSIX */
893 .setlease = cifs_setlease,
896 const struct file_operations cifs_file_strict_nobrl_ops = {
897 .read = do_sync_read,
898 .write = do_sync_write,
899 .aio_read = cifs_strict_readv,
900 .aio_write = cifs_strict_writev,
902 .release = cifs_close,
903 .fsync = cifs_strict_fsync,
905 .mmap = cifs_file_strict_mmap,
906 .splice_read = generic_file_splice_read,
907 .llseek = cifs_llseek,
908 #ifdef CONFIG_CIFS_POSIX
909 .unlocked_ioctl = cifs_ioctl,
910 #endif /* CONFIG_CIFS_POSIX */
911 .setlease = cifs_setlease,
914 const struct file_operations cifs_file_direct_nobrl_ops = {
915 /* BB reevaluate whether they can be done with directio, no cache */
916 .read = do_sync_read,
917 .write = do_sync_write,
918 .aio_read = cifs_user_readv,
919 .aio_write = cifs_user_writev,
921 .release = cifs_close,
924 .mmap = cifs_file_mmap,
925 .splice_read = generic_file_splice_read,
926 #ifdef CONFIG_CIFS_POSIX
927 .unlocked_ioctl = cifs_ioctl,
928 #endif /* CONFIG_CIFS_POSIX */
929 .llseek = cifs_llseek,
930 .setlease = cifs_setlease,
933 const struct file_operations cifs_dir_ops = {
934 .readdir = cifs_readdir,
935 .release = cifs_closedir,
936 .read = generic_read_dir,
937 .unlocked_ioctl = cifs_ioctl,
938 .llseek = generic_file_llseek,
942 cifs_init_once(void *inode)
944 struct cifsInodeInfo *cifsi = inode;
946 inode_init_once(&cifsi->vfs_inode);
947 INIT_LIST_HEAD(&cifsi->llist);
948 mutex_init(&cifsi->lock_mutex);
952 cifs_init_inodecache(void)
954 cifs_inode_cachep = kmem_cache_create("cifs_inode_cache",
955 sizeof(struct cifsInodeInfo),
956 0, (SLAB_RECLAIM_ACCOUNT|
959 if (cifs_inode_cachep == NULL)
966 cifs_destroy_inodecache(void)
968 kmem_cache_destroy(cifs_inode_cachep);
972 cifs_init_request_bufs(void)
974 if (CIFSMaxBufSize < 8192) {
975 /* Buffer size can not be smaller than 2 * PATH_MAX since maximum
976 Unicode path name has to fit in any SMB/CIFS path based frames */
977 CIFSMaxBufSize = 8192;
978 } else if (CIFSMaxBufSize > 1024*127) {
979 CIFSMaxBufSize = 1024 * 127;
981 CIFSMaxBufSize &= 0x1FE00; /* Round size to even 512 byte mult*/
983 /* cERROR(1, "CIFSMaxBufSize %d 0x%x",CIFSMaxBufSize,CIFSMaxBufSize); */
984 cifs_req_cachep = kmem_cache_create("cifs_request",
986 MAX_CIFS_HDR_SIZE, 0,
987 SLAB_HWCACHE_ALIGN, NULL);
988 if (cifs_req_cachep == NULL)
991 if (cifs_min_rcv < 1)
993 else if (cifs_min_rcv > 64) {
995 cERROR(1, "cifs_min_rcv set to maximum (64)");
998 cifs_req_poolp = mempool_create_slab_pool(cifs_min_rcv,
1001 if (cifs_req_poolp == NULL) {
1002 kmem_cache_destroy(cifs_req_cachep);
1005 /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and
1006 almost all handle based requests (but not write response, nor is it
1007 sufficient for path based requests). A smaller size would have
1008 been more efficient (compacting multiple slab items on one 4k page)
1009 for the case in which debug was on, but this larger size allows
1010 more SMBs to use small buffer alloc and is still much more
1011 efficient to alloc 1 per page off the slab compared to 17K (5page)
1012 alloc of large cifs buffers even when page debugging is on */
1013 cifs_sm_req_cachep = kmem_cache_create("cifs_small_rq",
1014 MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN,
1016 if (cifs_sm_req_cachep == NULL) {
1017 mempool_destroy(cifs_req_poolp);
1018 kmem_cache_destroy(cifs_req_cachep);
1022 if (cifs_min_small < 2)
1024 else if (cifs_min_small > 256) {
1025 cifs_min_small = 256;
1026 cFYI(1, "cifs_min_small set to maximum (256)");
1029 cifs_sm_req_poolp = mempool_create_slab_pool(cifs_min_small,
1030 cifs_sm_req_cachep);
1032 if (cifs_sm_req_poolp == NULL) {
1033 mempool_destroy(cifs_req_poolp);
1034 kmem_cache_destroy(cifs_req_cachep);
1035 kmem_cache_destroy(cifs_sm_req_cachep);
1043 cifs_destroy_request_bufs(void)
1045 mempool_destroy(cifs_req_poolp);
1046 kmem_cache_destroy(cifs_req_cachep);
1047 mempool_destroy(cifs_sm_req_poolp);
1048 kmem_cache_destroy(cifs_sm_req_cachep);
1052 cifs_init_mids(void)
1054 cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids",
1055 sizeof(struct mid_q_entry), 0,
1056 SLAB_HWCACHE_ALIGN, NULL);
1057 if (cifs_mid_cachep == NULL)
1060 /* 3 is a reasonable minimum number of simultaneous operations */
1061 cifs_mid_poolp = mempool_create_slab_pool(3, cifs_mid_cachep);
1062 if (cifs_mid_poolp == NULL) {
1063 kmem_cache_destroy(cifs_mid_cachep);
1071 cifs_destroy_mids(void)
1073 mempool_destroy(cifs_mid_poolp);
1074 kmem_cache_destroy(cifs_mid_cachep);
1082 INIT_LIST_HEAD(&cifs_tcp_ses_list);
1083 #ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
1084 INIT_LIST_HEAD(&GlobalDnotifyReqList);
1085 INIT_LIST_HEAD(&GlobalDnotifyRsp_Q);
1086 #endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
1088 * Initialize Global counters
1090 atomic_set(&sesInfoAllocCount, 0);
1091 atomic_set(&tconInfoAllocCount, 0);
1092 atomic_set(&tcpSesAllocCount, 0);
1093 atomic_set(&tcpSesReconnectCount, 0);
1094 atomic_set(&tconInfoReconnectCount, 0);
1096 atomic_set(&bufAllocCount, 0);
1097 atomic_set(&smBufAllocCount, 0);
1098 #ifdef CONFIG_CIFS_STATS2
1099 atomic_set(&totBufAllocCount, 0);
1100 atomic_set(&totSmBufAllocCount, 0);
1101 #endif /* CONFIG_CIFS_STATS2 */
1103 atomic_set(&midCount, 0);
1104 GlobalCurrentXid = 0;
1105 GlobalTotalActiveXid = 0;
1106 GlobalMaxActiveXid = 0;
1107 spin_lock_init(&cifs_tcp_ses_lock);
1108 spin_lock_init(&cifs_file_list_lock);
1109 spin_lock_init(&GlobalMid_Lock);
1111 if (cifs_max_pending < 2) {
1112 cifs_max_pending = 2;
1113 cFYI(1, "cifs_max_pending set to min of 2");
1114 } else if (cifs_max_pending > CIFS_MAX_REQ) {
1115 cifs_max_pending = CIFS_MAX_REQ;
1116 cFYI(1, "cifs_max_pending set to max of %u", CIFS_MAX_REQ);
1119 rc = cifs_fscache_register();
1121 goto out_clean_proc;
1123 rc = cifs_init_inodecache();
1125 goto out_unreg_fscache;
1127 rc = cifs_init_mids();
1129 goto out_destroy_inodecache;
1131 rc = cifs_init_request_bufs();
1133 goto out_destroy_mids;
1135 #ifdef CONFIG_CIFS_UPCALL
1136 rc = register_key_type(&cifs_spnego_key_type);
1138 goto out_destroy_request_bufs;
1139 #endif /* CONFIG_CIFS_UPCALL */
1141 #ifdef CONFIG_CIFS_ACL
1142 rc = init_cifs_idmap();
1144 goto out_register_key_type;
1145 #endif /* CONFIG_CIFS_ACL */
1147 rc = register_filesystem(&cifs_fs_type);
1149 goto out_init_cifs_idmap;
1153 out_init_cifs_idmap:
1154 #ifdef CONFIG_CIFS_ACL
1156 out_register_key_type:
1158 #ifdef CONFIG_CIFS_UPCALL
1159 unregister_key_type(&cifs_spnego_key_type);
1160 out_destroy_request_bufs:
1162 cifs_destroy_request_bufs();
1164 cifs_destroy_mids();
1165 out_destroy_inodecache:
1166 cifs_destroy_inodecache();
1168 cifs_fscache_unregister();
1177 cFYI(DBG2, "exit_cifs");
1179 cifs_fscache_unregister();
1180 cifs_dfs_release_automount_timer();
1181 #ifdef CONFIG_CIFS_ACL
1182 cifs_destroy_idmaptrees();
1185 #ifdef CONFIG_CIFS_UPCALL
1186 unregister_key_type(&cifs_spnego_key_type);
1188 unregister_filesystem(&cifs_fs_type);
1189 cifs_destroy_inodecache();
1190 cifs_destroy_mids();
1191 cifs_destroy_request_bufs();
1194 MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>");
1195 MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */
1197 ("VFS to access servers complying with the SNIA CIFS Specification "
1198 "e.g. Samba and Windows");
1199 MODULE_VERSION(CIFS_VERSION);
1200 module_init(init_cifs)
1201 module_exit(exit_cifs)