4 * Copyright (C) International Business Machines Corp., 2002,2008
5 * Author(s): Steve French (sfrench@us.ibm.com)
7 * Common Internet FileSystem (CIFS) client
9 * This library is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU Lesser General Public License as published
11 * by the Free Software Foundation; either version 2.1 of the License, or
12 * (at your option) any later version.
14 * This library is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
17 * the GNU Lesser General Public License for more details.
19 * You should have received a copy of the GNU Lesser General Public License
20 * along with this library; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 /* Note that BB means BUGBUG (ie something to fix eventually) */
26 #include <linux/module.h>
28 #include <linux/mount.h>
29 #include <linux/slab.h>
30 #include <linux/init.h>
31 #include <linux/list.h>
32 #include <linux/seq_file.h>
33 #include <linux/vfs.h>
34 #include <linux/mempool.h>
35 #include <linux/delay.h>
36 #include <linux/kthread.h>
37 #include <linux/freezer.h>
41 #define DECLARE_GLOBALS_HERE
43 #include "cifsproto.h"
44 #include "cifs_debug.h"
45 #include "cifs_fs_sb.h"
47 #include <linux/key-type.h>
48 #include "cifs_spnego.h"
50 #define CIFS_MAGIC_NUMBER 0xFF534D42 /* the first four bytes of SMB PDUs */
55 unsigned int oplockEnabled = 1;
56 unsigned int linuxExtEnabled = 1;
57 unsigned int lookupCacheEnabled = 1;
58 unsigned int multiuser_mount = 0;
59 unsigned int global_secflags = CIFSSEC_DEF;
60 /* unsigned int ntlmv2_support = 0; */
61 unsigned int sign_CIFS_PDUs = 1;
62 static const struct super_operations cifs_super_ops;
63 unsigned int CIFSMaxBufSize = CIFS_MAX_MSGSIZE;
64 module_param(CIFSMaxBufSize, int, 0);
65 MODULE_PARM_DESC(CIFSMaxBufSize, "Network buffer size (not including header). "
66 "Default: 16384 Range: 8192 to 130048");
67 unsigned int cifs_min_rcv = CIFS_MIN_RCV_POOL;
68 module_param(cifs_min_rcv, int, 0);
69 MODULE_PARM_DESC(cifs_min_rcv, "Network buffers in pool. Default: 4 Range: "
71 unsigned int cifs_min_small = 30;
72 module_param(cifs_min_small, int, 0);
73 MODULE_PARM_DESC(cifs_min_small, "Small network buffers in pool. Default: 30 "
75 unsigned int cifs_max_pending = CIFS_MAX_REQ;
76 module_param(cifs_max_pending, int, 0);
77 MODULE_PARM_DESC(cifs_max_pending, "Simultaneous requests to server. "
78 "Default: 50 Range: 2 to 256");
79 unsigned short echo_retries = 5;
80 module_param(echo_retries, ushort, 0644);
81 MODULE_PARM_DESC(echo_retries, "Number of echo attempts before giving up and "
82 "reconnecting server. Default: 5. 0 means "
84 extern mempool_t *cifs_sm_req_poolp;
85 extern mempool_t *cifs_req_poolp;
86 extern mempool_t *cifs_mid_poolp;
89 cifs_sb_active(struct super_block *sb)
91 struct cifs_sb_info *server = CIFS_SB(sb);
93 if (atomic_inc_return(&server->active) == 1)
94 atomic_inc(&sb->s_active);
98 cifs_sb_deactive(struct super_block *sb)
100 struct cifs_sb_info *server = CIFS_SB(sb);
102 if (atomic_dec_and_test(&server->active))
103 deactivate_super(sb);
107 cifs_read_super(struct super_block *sb, struct smb_vol *volume_info,
108 const char *devname, int silent)
111 struct cifs_sb_info *cifs_sb;
114 cifs_sb = CIFS_SB(sb);
116 spin_lock_init(&cifs_sb->tlink_tree_lock);
117 cifs_sb->tlink_tree = RB_ROOT;
119 rc = bdi_setup_and_register(&cifs_sb->bdi, "cifs", BDI_CAP_MAP_COPY);
123 cifs_sb->bdi.ra_pages = default_backing_dev_info.ra_pages;
125 rc = cifs_mount(sb, cifs_sb, volume_info, devname);
129 cERROR(1, "cifs_mount failed w/return code = %d", rc);
130 goto out_mount_failed;
133 sb->s_magic = CIFS_MAGIC_NUMBER;
134 sb->s_op = &cifs_super_ops;
135 sb->s_bdi = &cifs_sb->bdi;
136 sb->s_blocksize = CIFS_MAX_MSGSIZE;
137 sb->s_blocksize_bits = 14; /* default 2**14 = CIFS_MAX_MSGSIZE */
138 inode = cifs_root_iget(sb);
146 sb->s_root = d_alloc_root(inode);
153 /* do that *after* d_alloc_root() - we want NULL ->d_op for root here */
154 if (cifs_sb_master_tcon(cifs_sb)->nocase)
155 sb->s_d_op = &cifs_ci_dentry_ops;
157 sb->s_d_op = &cifs_dentry_ops;
159 #ifdef CIFS_NFSD_EXPORT
160 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
161 cFYI(1, "export ops supported");
162 sb->s_export_op = &cifs_export_ops;
164 #endif /* CIFS_NFSD_EXPORT */
169 cERROR(1, "cifs_read_super: get root inode failed");
173 cifs_umount(sb, cifs_sb);
176 bdi_destroy(&cifs_sb->bdi);
181 cifs_put_super(struct super_block *sb)
184 struct cifs_sb_info *cifs_sb;
186 cFYI(1, "In cifs_put_super");
187 cifs_sb = CIFS_SB(sb);
188 if (cifs_sb == NULL) {
189 cFYI(1, "Empty cifs superblock info passed to unmount");
193 rc = cifs_umount(sb, cifs_sb);
195 cERROR(1, "cifs_umount failed with return code %d", rc);
196 if (cifs_sb->mountdata) {
197 kfree(cifs_sb->mountdata);
198 cifs_sb->mountdata = NULL;
201 unload_nls(cifs_sb->local_nls);
202 bdi_destroy(&cifs_sb->bdi);
207 cifs_statfs(struct dentry *dentry, struct kstatfs *buf)
209 struct super_block *sb = dentry->d_sb;
210 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
211 struct cifsTconInfo *tcon = cifs_sb_master_tcon(cifs_sb);
212 int rc = -EOPNOTSUPP;
217 buf->f_type = CIFS_MAGIC_NUMBER;
220 * PATH_MAX may be too long - it would presumably be total path,
221 * but note that some servers (includinng Samba 3) have a shorter
224 * Instead could get the real value via SMB_QUERY_FS_ATTRIBUTE_INFO.
226 buf->f_namelen = PATH_MAX;
227 buf->f_files = 0; /* undefined */
228 buf->f_ffree = 0; /* unlimited */
231 * We could add a second check for a QFS Unix capability bit
233 if ((tcon->ses->capabilities & CAP_UNIX) &&
234 (CIFS_POSIX_EXTENSIONS & le64_to_cpu(tcon->fsUnixInfo.Capability)))
235 rc = CIFSSMBQFSPosixInfo(xid, tcon, buf);
238 * Only need to call the old QFSInfo if failed on newer one,
241 if (rc && (tcon->ses->capabilities & CAP_NT_SMBS))
242 rc = CIFSSMBQFSInfo(xid, tcon, buf);
245 * Some old Windows servers also do not support level 103, retry with
246 * older level one if old server failed the previous call or we
247 * bypassed it because we detected that this was an older LANMAN sess
250 rc = SMBOldQFSInfo(xid, tcon, buf);
256 static int cifs_permission(struct inode *inode, int mask, unsigned int flags)
258 struct cifs_sb_info *cifs_sb;
260 if (flags & IPERM_FLAG_RCU)
263 cifs_sb = CIFS_SB(inode->i_sb);
265 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) {
266 if ((mask & MAY_EXEC) && !execute_ok(inode))
270 } else /* file mode might have been restricted at mount time
271 on the client (above and beyond ACL on servers) for
272 servers which do not support setting and viewing mode bits,
273 so allowing client to check permissions is useful */
274 return generic_permission(inode, mask, flags, NULL);
277 static struct kmem_cache *cifs_inode_cachep;
278 static struct kmem_cache *cifs_req_cachep;
279 static struct kmem_cache *cifs_mid_cachep;
280 static struct kmem_cache *cifs_sm_req_cachep;
281 mempool_t *cifs_sm_req_poolp;
282 mempool_t *cifs_req_poolp;
283 mempool_t *cifs_mid_poolp;
285 static struct inode *
286 cifs_alloc_inode(struct super_block *sb)
288 struct cifsInodeInfo *cifs_inode;
289 cifs_inode = kmem_cache_alloc(cifs_inode_cachep, GFP_KERNEL);
292 cifs_inode->cifsAttrs = 0x20; /* default */
293 cifs_inode->time = 0;
294 /* Until the file is open and we have gotten oplock
295 info back from the server, can not assume caching of
296 file data or metadata */
297 cifs_set_oplock_level(cifs_inode, 0);
298 cifs_inode->delete_pending = false;
299 cifs_inode->invalid_mapping = false;
300 cifs_inode->vfs_inode.i_blkbits = 14; /* 2**14 = CIFS_MAX_MSGSIZE */
301 cifs_inode->server_eof = 0;
302 cifs_inode->uniqueid = 0;
303 cifs_inode->createtime = 0;
305 /* Can not set i_flags here - they get immediately overwritten
306 to zero by the VFS */
307 /* cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME;*/
308 INIT_LIST_HEAD(&cifs_inode->openFileList);
309 return &cifs_inode->vfs_inode;
312 static void cifs_i_callback(struct rcu_head *head)
314 struct inode *inode = container_of(head, struct inode, i_rcu);
315 INIT_LIST_HEAD(&inode->i_dentry);
316 kmem_cache_free(cifs_inode_cachep, CIFS_I(inode));
320 cifs_destroy_inode(struct inode *inode)
322 call_rcu(&inode->i_rcu, cifs_i_callback);
326 cifs_evict_inode(struct inode *inode)
328 truncate_inode_pages(&inode->i_data, 0);
329 end_writeback(inode);
330 cifs_fscache_release_inode_cookie(inode);
334 cifs_show_address(struct seq_file *s, struct TCP_Server_Info *server)
336 struct sockaddr_in *sa = (struct sockaddr_in *) &server->dstaddr;
337 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *) &server->dstaddr;
339 seq_printf(s, ",addr=");
341 switch (server->dstaddr.ss_family) {
343 seq_printf(s, "%pI4", &sa->sin_addr.s_addr);
346 seq_printf(s, "%pI6", &sa6->sin6_addr.s6_addr);
347 if (sa6->sin6_scope_id)
348 seq_printf(s, "%%%u", sa6->sin6_scope_id);
351 seq_printf(s, "(unknown)");
356 * cifs_show_options() is for displaying mount options in /proc/mounts.
357 * Not all settable options are displayed but most of the important
361 cifs_show_options(struct seq_file *s, struct vfsmount *m)
363 struct cifs_sb_info *cifs_sb = CIFS_SB(m->mnt_sb);
364 struct cifsTconInfo *tcon = cifs_sb_master_tcon(cifs_sb);
365 struct sockaddr *srcaddr;
366 srcaddr = (struct sockaddr *)&tcon->ses->server->srcaddr;
368 seq_printf(s, ",unc=%s", tcon->treeName);
370 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER)
371 seq_printf(s, ",multiuser");
372 else if (tcon->ses->user_name)
373 seq_printf(s, ",username=%s", tcon->ses->user_name);
375 if (tcon->ses->domainName)
376 seq_printf(s, ",domain=%s", tcon->ses->domainName);
378 if (srcaddr->sa_family != AF_UNSPEC) {
379 struct sockaddr_in *saddr4;
380 struct sockaddr_in6 *saddr6;
381 saddr4 = (struct sockaddr_in *)srcaddr;
382 saddr6 = (struct sockaddr_in6 *)srcaddr;
383 if (srcaddr->sa_family == AF_INET6)
384 seq_printf(s, ",srcaddr=%pI6c",
386 else if (srcaddr->sa_family == AF_INET)
387 seq_printf(s, ",srcaddr=%pI4",
388 &saddr4->sin_addr.s_addr);
390 seq_printf(s, ",srcaddr=BAD-AF:%i",
391 (int)(srcaddr->sa_family));
394 seq_printf(s, ",uid=%d", cifs_sb->mnt_uid);
395 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)
396 seq_printf(s, ",forceuid");
398 seq_printf(s, ",noforceuid");
400 seq_printf(s, ",gid=%d", cifs_sb->mnt_gid);
401 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)
402 seq_printf(s, ",forcegid");
404 seq_printf(s, ",noforcegid");
406 cifs_show_address(s, tcon->ses->server);
409 seq_printf(s, ",file_mode=0%o,dir_mode=0%o",
410 cifs_sb->mnt_file_mode,
411 cifs_sb->mnt_dir_mode);
413 seq_printf(s, ",seal");
415 seq_printf(s, ",nocase");
417 seq_printf(s, ",hard");
418 if (cifs_sb->prepath)
419 seq_printf(s, ",prepath=%s", cifs_sb->prepath);
420 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
421 seq_printf(s, ",posixpaths");
422 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)
423 seq_printf(s, ",setuids");
424 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
425 seq_printf(s, ",serverino");
426 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO)
427 seq_printf(s, ",directio");
428 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
429 seq_printf(s, ",nouser_xattr");
430 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR)
431 seq_printf(s, ",mapchars");
432 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)
433 seq_printf(s, ",sfu");
434 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
435 seq_printf(s, ",nobrl");
436 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
437 seq_printf(s, ",cifsacl");
438 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)
439 seq_printf(s, ",dynperm");
440 if (m->mnt_sb->s_flags & MS_POSIXACL)
441 seq_printf(s, ",acl");
442 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS)
443 seq_printf(s, ",mfsymlinks");
444 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_FSCACHE)
445 seq_printf(s, ",fsc");
447 seq_printf(s, ",rsize=%d", cifs_sb->rsize);
448 seq_printf(s, ",wsize=%d", cifs_sb->wsize);
449 /* convert actimeo and display it in seconds */
450 seq_printf(s, ",actimeo=%lu", cifs_sb->actimeo / HZ);
455 static void cifs_umount_begin(struct super_block *sb)
457 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
458 struct cifsTconInfo *tcon;
463 tcon = cifs_sb_master_tcon(cifs_sb);
465 spin_lock(&cifs_tcp_ses_lock);
466 if ((tcon->tc_count > 1) || (tcon->tidStatus == CifsExiting)) {
467 /* we have other mounts to same share or we have
468 already tried to force umount this and woken up
469 all waiting network requests, nothing to do */
470 spin_unlock(&cifs_tcp_ses_lock);
472 } else if (tcon->tc_count == 1)
473 tcon->tidStatus = CifsExiting;
474 spin_unlock(&cifs_tcp_ses_lock);
476 /* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */
477 /* cancel_notify_requests(tcon); */
478 if (tcon->ses && tcon->ses->server) {
479 cFYI(1, "wake up tasks now - umount begin not complete");
480 wake_up_all(&tcon->ses->server->request_q);
481 wake_up_all(&tcon->ses->server->response_q);
482 msleep(1); /* yield */
483 /* we have to kick the requests once more */
484 wake_up_all(&tcon->ses->server->response_q);
491 #ifdef CONFIG_CIFS_STATS2
492 static int cifs_show_stats(struct seq_file *s, struct vfsmount *mnt)
499 static int cifs_remount(struct super_block *sb, int *flags, char *data)
501 *flags |= MS_NODIRATIME;
505 static int cifs_drop_inode(struct inode *inode)
507 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
509 /* no serverino => unconditional eviction */
510 return !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) ||
511 generic_drop_inode(inode);
514 static const struct super_operations cifs_super_ops = {
515 .put_super = cifs_put_super,
516 .statfs = cifs_statfs,
517 .alloc_inode = cifs_alloc_inode,
518 .destroy_inode = cifs_destroy_inode,
519 .drop_inode = cifs_drop_inode,
520 .evict_inode = cifs_evict_inode,
521 /* .delete_inode = cifs_delete_inode, */ /* Do not need above
522 function unless later we add lazy close of inodes or unless the
523 kernel forgets to call us with the same number of releases (closes)
525 .show_options = cifs_show_options,
526 .umount_begin = cifs_umount_begin,
527 .remount_fs = cifs_remount,
528 #ifdef CONFIG_CIFS_STATS2
529 .show_stats = cifs_show_stats,
533 static struct dentry *
534 cifs_do_mount(struct file_system_type *fs_type,
535 int flags, const char *dev_name, void *data)
538 struct super_block *sb;
539 struct cifs_sb_info *cifs_sb;
540 struct smb_vol *volume_info;
543 cFYI(1, "Devname: %s flags: %d ", dev_name, flags);
545 rc = cifs_setup_volume_info(&volume_info, (char *)data, dev_name);
549 cifs_sb = kzalloc(sizeof(struct cifs_sb_info), GFP_KERNEL);
550 if (cifs_sb == NULL) {
551 root = ERR_PTR(-ENOMEM);
555 cifs_setup_cifs_sb(volume_info, cifs_sb);
557 sb = sget(fs_type, NULL, set_anon_super, NULL);
564 * Copy mount params for use in submounts. Better to do
565 * the copy here and deal with the error before cleanup gets
566 * complicated post-mount.
568 cifs_sb->mountdata = kstrndup(data, PAGE_SIZE, GFP_KERNEL);
569 if (cifs_sb->mountdata == NULL) {
570 root = ERR_PTR(-ENOMEM);
575 /* BB should we make this contingent on mount parm? */
576 sb->s_flags |= MS_NODIRATIME | MS_NOATIME;
577 sb->s_fs_info = cifs_sb;
579 rc = cifs_read_super(sb, volume_info, dev_name,
580 flags & MS_SILENT ? 1 : 0);
586 sb->s_flags |= MS_ACTIVE;
588 root = dget(sb->s_root);
592 kfree(cifs_sb->mountdata);
593 deactivate_locked_super(sb);
596 unload_nls(cifs_sb->local_nls);
600 cifs_cleanup_volume_info(&volume_info);
604 static ssize_t cifs_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
605 unsigned long nr_segs, loff_t pos)
607 struct inode *inode = iocb->ki_filp->f_path.dentry->d_inode;
611 written = generic_file_aio_write(iocb, iov, nr_segs, pos);
613 if (CIFS_I(inode)->clientCanCacheAll)
616 rc = filemap_fdatawrite(inode->i_mapping);
618 cFYI(1, "cifs_file_aio_write: %d rc on %p inode", rc, inode);
623 static loff_t cifs_llseek(struct file *file, loff_t offset, int origin)
625 /* origin == SEEK_END => we must revalidate the cached file length */
626 if (origin == SEEK_END) {
628 struct inode *inode = file->f_path.dentry->d_inode;
631 * We need to be sure that all dirty pages are written and the
632 * server has the newest file length.
634 if (!CIFS_I(inode)->clientCanCacheRead && inode->i_mapping &&
635 inode->i_mapping->nrpages != 0) {
636 rc = filemap_fdatawait(inode->i_mapping);
638 mapping_set_error(inode->i_mapping, rc);
643 * Some applications poll for the file length in this strange
644 * way so we must seek to end on non-oplocked files by
645 * setting the revalidate time to zero.
647 CIFS_I(inode)->time = 0;
649 rc = cifs_revalidate_file_attr(file);
653 return generic_file_llseek_unlocked(file, offset, origin);
656 static int cifs_setlease(struct file *file, long arg, struct file_lock **lease)
658 /* note that this is called by vfs setlease with lock_flocks held
659 to protect *lease from going away */
660 struct inode *inode = file->f_path.dentry->d_inode;
661 struct cifsFileInfo *cfile = file->private_data;
663 if (!(S_ISREG(inode->i_mode)))
666 /* check if file is oplocked */
667 if (((arg == F_RDLCK) &&
668 (CIFS_I(inode)->clientCanCacheRead)) ||
670 (CIFS_I(inode)->clientCanCacheAll)))
671 return generic_setlease(file, arg, lease);
672 else if (tlink_tcon(cfile->tlink)->local_lease &&
673 !CIFS_I(inode)->clientCanCacheRead)
674 /* If the server claims to support oplock on this
675 file, then we still need to check oplock even
676 if the local_lease mount option is set, but there
677 are servers which do not support oplock for which
678 this mount option may be useful if the user
679 knows that the file won't be changed on the server
681 return generic_setlease(file, arg, lease);
686 struct file_system_type cifs_fs_type = {
687 .owner = THIS_MODULE,
689 .mount = cifs_do_mount,
690 .kill_sb = kill_anon_super,
693 const struct inode_operations cifs_dir_inode_ops = {
694 .create = cifs_create,
695 .lookup = cifs_lookup,
696 .getattr = cifs_getattr,
697 .unlink = cifs_unlink,
698 .link = cifs_hardlink,
701 .rename = cifs_rename,
702 .permission = cifs_permission,
703 /* revalidate:cifs_revalidate, */
704 .setattr = cifs_setattr,
705 .symlink = cifs_symlink,
707 #ifdef CONFIG_CIFS_XATTR
708 .setxattr = cifs_setxattr,
709 .getxattr = cifs_getxattr,
710 .listxattr = cifs_listxattr,
711 .removexattr = cifs_removexattr,
715 const struct inode_operations cifs_file_inode_ops = {
716 /* revalidate:cifs_revalidate, */
717 .setattr = cifs_setattr,
718 .getattr = cifs_getattr, /* do we need this anymore? */
719 .rename = cifs_rename,
720 .permission = cifs_permission,
721 #ifdef CONFIG_CIFS_XATTR
722 .setxattr = cifs_setxattr,
723 .getxattr = cifs_getxattr,
724 .listxattr = cifs_listxattr,
725 .removexattr = cifs_removexattr,
729 const struct inode_operations cifs_symlink_inode_ops = {
730 .readlink = generic_readlink,
731 .follow_link = cifs_follow_link,
732 .put_link = cifs_put_link,
733 .permission = cifs_permission,
734 /* BB add the following two eventually */
735 /* revalidate: cifs_revalidate,
736 setattr: cifs_notify_change, *//* BB do we need notify change */
737 #ifdef CONFIG_CIFS_XATTR
738 .setxattr = cifs_setxattr,
739 .getxattr = cifs_getxattr,
740 .listxattr = cifs_listxattr,
741 .removexattr = cifs_removexattr,
745 const struct file_operations cifs_file_ops = {
746 .read = do_sync_read,
747 .write = do_sync_write,
748 .aio_read = generic_file_aio_read,
749 .aio_write = cifs_file_aio_write,
751 .release = cifs_close,
755 .mmap = cifs_file_mmap,
756 .splice_read = generic_file_splice_read,
757 .llseek = cifs_llseek,
758 #ifdef CONFIG_CIFS_POSIX
759 .unlocked_ioctl = cifs_ioctl,
760 #endif /* CONFIG_CIFS_POSIX */
761 .setlease = cifs_setlease,
764 const struct file_operations cifs_file_strict_ops = {
765 .read = do_sync_read,
766 .write = do_sync_write,
767 .aio_read = cifs_strict_readv,
768 .aio_write = cifs_strict_writev,
770 .release = cifs_close,
772 .fsync = cifs_strict_fsync,
774 .mmap = cifs_file_strict_mmap,
775 .splice_read = generic_file_splice_read,
776 .llseek = cifs_llseek,
777 #ifdef CONFIG_CIFS_POSIX
778 .unlocked_ioctl = cifs_ioctl,
779 #endif /* CONFIG_CIFS_POSIX */
780 .setlease = cifs_setlease,
783 const struct file_operations cifs_file_direct_ops = {
784 /* BB reevaluate whether they can be done with directio, no cache */
785 .read = do_sync_read,
786 .write = do_sync_write,
787 .aio_read = cifs_user_readv,
788 .aio_write = cifs_user_writev,
790 .release = cifs_close,
794 .mmap = cifs_file_mmap,
795 .splice_read = generic_file_splice_read,
796 #ifdef CONFIG_CIFS_POSIX
797 .unlocked_ioctl = cifs_ioctl,
798 #endif /* CONFIG_CIFS_POSIX */
799 .llseek = cifs_llseek,
800 .setlease = cifs_setlease,
803 const struct file_operations cifs_file_nobrl_ops = {
804 .read = do_sync_read,
805 .write = do_sync_write,
806 .aio_read = generic_file_aio_read,
807 .aio_write = cifs_file_aio_write,
809 .release = cifs_close,
812 .mmap = cifs_file_mmap,
813 .splice_read = generic_file_splice_read,
814 .llseek = cifs_llseek,
815 #ifdef CONFIG_CIFS_POSIX
816 .unlocked_ioctl = cifs_ioctl,
817 #endif /* CONFIG_CIFS_POSIX */
818 .setlease = cifs_setlease,
821 const struct file_operations cifs_file_strict_nobrl_ops = {
822 .read = do_sync_read,
823 .write = do_sync_write,
824 .aio_read = cifs_strict_readv,
825 .aio_write = cifs_strict_writev,
827 .release = cifs_close,
828 .fsync = cifs_strict_fsync,
830 .mmap = cifs_file_strict_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_direct_nobrl_ops = {
840 /* BB reevaluate whether they can be done with directio, no cache */
841 .read = do_sync_read,
842 .write = do_sync_write,
843 .aio_read = cifs_user_readv,
844 .aio_write = cifs_user_writev,
846 .release = cifs_close,
849 .mmap = cifs_file_mmap,
850 .splice_read = generic_file_splice_read,
851 #ifdef CONFIG_CIFS_POSIX
852 .unlocked_ioctl = cifs_ioctl,
853 #endif /* CONFIG_CIFS_POSIX */
854 .llseek = cifs_llseek,
855 .setlease = cifs_setlease,
858 const struct file_operations cifs_dir_ops = {
859 .readdir = cifs_readdir,
860 .release = cifs_closedir,
861 .read = generic_read_dir,
862 .unlocked_ioctl = cifs_ioctl,
863 .llseek = generic_file_llseek,
867 cifs_init_once(void *inode)
869 struct cifsInodeInfo *cifsi = inode;
871 inode_init_once(&cifsi->vfs_inode);
872 INIT_LIST_HEAD(&cifsi->lockList);
876 cifs_init_inodecache(void)
878 cifs_inode_cachep = kmem_cache_create("cifs_inode_cache",
879 sizeof(struct cifsInodeInfo),
880 0, (SLAB_RECLAIM_ACCOUNT|
883 if (cifs_inode_cachep == NULL)
890 cifs_destroy_inodecache(void)
892 kmem_cache_destroy(cifs_inode_cachep);
896 cifs_init_request_bufs(void)
898 if (CIFSMaxBufSize < 8192) {
899 /* Buffer size can not be smaller than 2 * PATH_MAX since maximum
900 Unicode path name has to fit in any SMB/CIFS path based frames */
901 CIFSMaxBufSize = 8192;
902 } else if (CIFSMaxBufSize > 1024*127) {
903 CIFSMaxBufSize = 1024 * 127;
905 CIFSMaxBufSize &= 0x1FE00; /* Round size to even 512 byte mult*/
907 /* cERROR(1, "CIFSMaxBufSize %d 0x%x",CIFSMaxBufSize,CIFSMaxBufSize); */
908 cifs_req_cachep = kmem_cache_create("cifs_request",
910 MAX_CIFS_HDR_SIZE, 0,
911 SLAB_HWCACHE_ALIGN, NULL);
912 if (cifs_req_cachep == NULL)
915 if (cifs_min_rcv < 1)
917 else if (cifs_min_rcv > 64) {
919 cERROR(1, "cifs_min_rcv set to maximum (64)");
922 cifs_req_poolp = mempool_create_slab_pool(cifs_min_rcv,
925 if (cifs_req_poolp == NULL) {
926 kmem_cache_destroy(cifs_req_cachep);
929 /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and
930 almost all handle based requests (but not write response, nor is it
931 sufficient for path based requests). A smaller size would have
932 been more efficient (compacting multiple slab items on one 4k page)
933 for the case in which debug was on, but this larger size allows
934 more SMBs to use small buffer alloc and is still much more
935 efficient to alloc 1 per page off the slab compared to 17K (5page)
936 alloc of large cifs buffers even when page debugging is on */
937 cifs_sm_req_cachep = kmem_cache_create("cifs_small_rq",
938 MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN,
940 if (cifs_sm_req_cachep == NULL) {
941 mempool_destroy(cifs_req_poolp);
942 kmem_cache_destroy(cifs_req_cachep);
946 if (cifs_min_small < 2)
948 else if (cifs_min_small > 256) {
949 cifs_min_small = 256;
950 cFYI(1, "cifs_min_small set to maximum (256)");
953 cifs_sm_req_poolp = mempool_create_slab_pool(cifs_min_small,
956 if (cifs_sm_req_poolp == NULL) {
957 mempool_destroy(cifs_req_poolp);
958 kmem_cache_destroy(cifs_req_cachep);
959 kmem_cache_destroy(cifs_sm_req_cachep);
967 cifs_destroy_request_bufs(void)
969 mempool_destroy(cifs_req_poolp);
970 kmem_cache_destroy(cifs_req_cachep);
971 mempool_destroy(cifs_sm_req_poolp);
972 kmem_cache_destroy(cifs_sm_req_cachep);
978 cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids",
979 sizeof(struct mid_q_entry), 0,
980 SLAB_HWCACHE_ALIGN, NULL);
981 if (cifs_mid_cachep == NULL)
984 /* 3 is a reasonable minimum number of simultaneous operations */
985 cifs_mid_poolp = mempool_create_slab_pool(3, cifs_mid_cachep);
986 if (cifs_mid_poolp == NULL) {
987 kmem_cache_destroy(cifs_mid_cachep);
995 cifs_destroy_mids(void)
997 mempool_destroy(cifs_mid_poolp);
998 kmem_cache_destroy(cifs_mid_cachep);
1006 INIT_LIST_HEAD(&cifs_tcp_ses_list);
1007 #ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
1008 INIT_LIST_HEAD(&GlobalDnotifyReqList);
1009 INIT_LIST_HEAD(&GlobalDnotifyRsp_Q);
1010 #endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
1012 * Initialize Global counters
1014 atomic_set(&sesInfoAllocCount, 0);
1015 atomic_set(&tconInfoAllocCount, 0);
1016 atomic_set(&tcpSesAllocCount, 0);
1017 atomic_set(&tcpSesReconnectCount, 0);
1018 atomic_set(&tconInfoReconnectCount, 0);
1020 atomic_set(&bufAllocCount, 0);
1021 atomic_set(&smBufAllocCount, 0);
1022 #ifdef CONFIG_CIFS_STATS2
1023 atomic_set(&totBufAllocCount, 0);
1024 atomic_set(&totSmBufAllocCount, 0);
1025 #endif /* CONFIG_CIFS_STATS2 */
1027 atomic_set(&midCount, 0);
1028 GlobalCurrentXid = 0;
1029 GlobalTotalActiveXid = 0;
1030 GlobalMaxActiveXid = 0;
1031 spin_lock_init(&cifs_tcp_ses_lock);
1032 spin_lock_init(&cifs_file_list_lock);
1033 spin_lock_init(&GlobalMid_Lock);
1035 if (cifs_max_pending < 2) {
1036 cifs_max_pending = 2;
1037 cFYI(1, "cifs_max_pending set to min of 2");
1038 } else if (cifs_max_pending > 256) {
1039 cifs_max_pending = 256;
1040 cFYI(1, "cifs_max_pending set to max of 256");
1043 rc = cifs_fscache_register();
1045 goto out_clean_proc;
1047 rc = cifs_init_inodecache();
1049 goto out_unreg_fscache;
1051 rc = cifs_init_mids();
1053 goto out_destroy_inodecache;
1055 rc = cifs_init_request_bufs();
1057 goto out_destroy_mids;
1059 #ifdef CONFIG_CIFS_UPCALL
1060 rc = register_key_type(&cifs_spnego_key_type);
1062 goto out_destroy_request_bufs;
1063 #endif /* CONFIG_CIFS_UPCALL */
1065 #ifdef CONFIG_CIFS_ACL
1066 rc = init_cifs_idmap();
1068 goto out_register_key_type;
1069 #endif /* CONFIG_CIFS_ACL */
1071 rc = register_filesystem(&cifs_fs_type);
1073 goto out_init_cifs_idmap;
1077 out_init_cifs_idmap:
1078 #ifdef CONFIG_CIFS_ACL
1080 out_register_key_type:
1082 #ifdef CONFIG_CIFS_UPCALL
1083 unregister_key_type(&cifs_spnego_key_type);
1084 out_destroy_request_bufs:
1086 cifs_destroy_request_bufs();
1088 cifs_destroy_mids();
1089 out_destroy_inodecache:
1090 cifs_destroy_inodecache();
1092 cifs_fscache_unregister();
1101 cFYI(DBG2, "exit_cifs");
1103 cifs_fscache_unregister();
1104 #ifdef CONFIG_CIFS_DFS_UPCALL
1105 cifs_dfs_release_automount_timer();
1107 #ifdef CONFIG_CIFS_ACL
1108 cifs_destroy_idmaptrees();
1111 #ifdef CONFIG_CIFS_UPCALL
1112 unregister_key_type(&cifs_spnego_key_type);
1114 unregister_filesystem(&cifs_fs_type);
1115 cifs_destroy_inodecache();
1116 cifs_destroy_mids();
1117 cifs_destroy_request_bufs();
1120 MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>");
1121 MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */
1123 ("VFS to access servers complying with the SNIA CIFS Specification "
1124 "e.g. Samba and Windows");
1125 MODULE_VERSION(CIFS_VERSION);
1126 module_init(init_cifs)
1127 module_exit(exit_cifs)