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);
565 * Copy mount params for use in submounts. Better to do
566 * the copy here and deal with the error before cleanup gets
567 * complicated post-mount.
569 cifs_sb->mountdata = kstrndup(data, PAGE_SIZE, GFP_KERNEL);
570 if (cifs_sb->mountdata == NULL) {
571 root = ERR_PTR(-ENOMEM);
576 /* BB should we make this contingent on mount parm? */
577 sb->s_flags |= MS_NODIRATIME | MS_NOATIME;
578 sb->s_fs_info = cifs_sb;
580 rc = cifs_read_super(sb, volume_info, dev_name,
581 flags & MS_SILENT ? 1 : 0);
587 sb->s_flags |= MS_ACTIVE;
589 root = dget(sb->s_root);
591 cifs_cleanup_volume_info(&volume_info);
595 kfree(cifs_sb->mountdata);
596 unload_nls(cifs_sb->local_nls);
598 deactivate_locked_super(sb);
599 cifs_cleanup_volume_info(&volume_info);
603 static ssize_t cifs_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
604 unsigned long nr_segs, loff_t pos)
606 struct inode *inode = iocb->ki_filp->f_path.dentry->d_inode;
610 written = generic_file_aio_write(iocb, iov, nr_segs, pos);
612 if (CIFS_I(inode)->clientCanCacheAll)
615 rc = filemap_fdatawrite(inode->i_mapping);
617 cFYI(1, "cifs_file_aio_write: %d rc on %p inode", rc, inode);
622 static loff_t cifs_llseek(struct file *file, loff_t offset, int origin)
624 /* origin == SEEK_END => we must revalidate the cached file length */
625 if (origin == SEEK_END) {
627 struct inode *inode = file->f_path.dentry->d_inode;
630 * We need to be sure that all dirty pages are written and the
631 * server has the newest file length.
633 if (!CIFS_I(inode)->clientCanCacheRead && inode->i_mapping &&
634 inode->i_mapping->nrpages != 0) {
635 rc = filemap_fdatawait(inode->i_mapping);
637 mapping_set_error(inode->i_mapping, rc);
642 * Some applications poll for the file length in this strange
643 * way so we must seek to end on non-oplocked files by
644 * setting the revalidate time to zero.
646 CIFS_I(inode)->time = 0;
648 rc = cifs_revalidate_file_attr(file);
652 return generic_file_llseek_unlocked(file, offset, origin);
655 static int cifs_setlease(struct file *file, long arg, struct file_lock **lease)
657 /* note that this is called by vfs setlease with lock_flocks held
658 to protect *lease from going away */
659 struct inode *inode = file->f_path.dentry->d_inode;
660 struct cifsFileInfo *cfile = file->private_data;
662 if (!(S_ISREG(inode->i_mode)))
665 /* check if file is oplocked */
666 if (((arg == F_RDLCK) &&
667 (CIFS_I(inode)->clientCanCacheRead)) ||
669 (CIFS_I(inode)->clientCanCacheAll)))
670 return generic_setlease(file, arg, lease);
671 else if (tlink_tcon(cfile->tlink)->local_lease &&
672 !CIFS_I(inode)->clientCanCacheRead)
673 /* If the server claims to support oplock on this
674 file, then we still need to check oplock even
675 if the local_lease mount option is set, but there
676 are servers which do not support oplock for which
677 this mount option may be useful if the user
678 knows that the file won't be changed on the server
680 return generic_setlease(file, arg, lease);
685 struct file_system_type cifs_fs_type = {
686 .owner = THIS_MODULE,
688 .mount = cifs_do_mount,
689 .kill_sb = kill_anon_super,
692 const struct inode_operations cifs_dir_inode_ops = {
693 .create = cifs_create,
694 .lookup = cifs_lookup,
695 .getattr = cifs_getattr,
696 .unlink = cifs_unlink,
697 .link = cifs_hardlink,
700 .rename = cifs_rename,
701 .permission = cifs_permission,
702 /* revalidate:cifs_revalidate, */
703 .setattr = cifs_setattr,
704 .symlink = cifs_symlink,
706 #ifdef CONFIG_CIFS_XATTR
707 .setxattr = cifs_setxattr,
708 .getxattr = cifs_getxattr,
709 .listxattr = cifs_listxattr,
710 .removexattr = cifs_removexattr,
714 const struct inode_operations cifs_file_inode_ops = {
715 /* revalidate:cifs_revalidate, */
716 .setattr = cifs_setattr,
717 .getattr = cifs_getattr, /* do we need this anymore? */
718 .rename = cifs_rename,
719 .permission = cifs_permission,
720 #ifdef CONFIG_CIFS_XATTR
721 .setxattr = cifs_setxattr,
722 .getxattr = cifs_getxattr,
723 .listxattr = cifs_listxattr,
724 .removexattr = cifs_removexattr,
728 const struct inode_operations cifs_symlink_inode_ops = {
729 .readlink = generic_readlink,
730 .follow_link = cifs_follow_link,
731 .put_link = cifs_put_link,
732 .permission = cifs_permission,
733 /* BB add the following two eventually */
734 /* revalidate: cifs_revalidate,
735 setattr: cifs_notify_change, *//* BB do we need notify change */
736 #ifdef CONFIG_CIFS_XATTR
737 .setxattr = cifs_setxattr,
738 .getxattr = cifs_getxattr,
739 .listxattr = cifs_listxattr,
740 .removexattr = cifs_removexattr,
744 const struct file_operations cifs_file_ops = {
745 .read = do_sync_read,
746 .write = do_sync_write,
747 .aio_read = generic_file_aio_read,
748 .aio_write = cifs_file_aio_write,
750 .release = cifs_close,
754 .mmap = cifs_file_mmap,
755 .splice_read = generic_file_splice_read,
756 .llseek = cifs_llseek,
757 #ifdef CONFIG_CIFS_POSIX
758 .unlocked_ioctl = cifs_ioctl,
759 #endif /* CONFIG_CIFS_POSIX */
760 .setlease = cifs_setlease,
763 const struct file_operations cifs_file_strict_ops = {
764 .read = do_sync_read,
765 .write = do_sync_write,
766 .aio_read = cifs_strict_readv,
767 .aio_write = cifs_strict_writev,
769 .release = cifs_close,
771 .fsync = cifs_strict_fsync,
773 .mmap = cifs_file_strict_mmap,
774 .splice_read = generic_file_splice_read,
775 .llseek = cifs_llseek,
776 #ifdef CONFIG_CIFS_POSIX
777 .unlocked_ioctl = cifs_ioctl,
778 #endif /* CONFIG_CIFS_POSIX */
779 .setlease = cifs_setlease,
782 const struct file_operations cifs_file_direct_ops = {
783 /* BB reevaluate whether they can be done with directio, no cache */
784 .read = do_sync_read,
785 .write = do_sync_write,
786 .aio_read = cifs_user_readv,
787 .aio_write = cifs_user_writev,
789 .release = cifs_close,
793 .mmap = cifs_file_mmap,
794 .splice_read = generic_file_splice_read,
795 #ifdef CONFIG_CIFS_POSIX
796 .unlocked_ioctl = cifs_ioctl,
797 #endif /* CONFIG_CIFS_POSIX */
798 .llseek = cifs_llseek,
799 .setlease = cifs_setlease,
802 const struct file_operations cifs_file_nobrl_ops = {
803 .read = do_sync_read,
804 .write = do_sync_write,
805 .aio_read = generic_file_aio_read,
806 .aio_write = cifs_file_aio_write,
808 .release = cifs_close,
811 .mmap = cifs_file_mmap,
812 .splice_read = generic_file_splice_read,
813 .llseek = cifs_llseek,
814 #ifdef CONFIG_CIFS_POSIX
815 .unlocked_ioctl = cifs_ioctl,
816 #endif /* CONFIG_CIFS_POSIX */
817 .setlease = cifs_setlease,
820 const struct file_operations cifs_file_strict_nobrl_ops = {
821 .read = do_sync_read,
822 .write = do_sync_write,
823 .aio_read = cifs_strict_readv,
824 .aio_write = cifs_strict_writev,
826 .release = cifs_close,
827 .fsync = cifs_strict_fsync,
829 .mmap = cifs_file_strict_mmap,
830 .splice_read = generic_file_splice_read,
831 .llseek = cifs_llseek,
832 #ifdef CONFIG_CIFS_POSIX
833 .unlocked_ioctl = cifs_ioctl,
834 #endif /* CONFIG_CIFS_POSIX */
835 .setlease = cifs_setlease,
838 const struct file_operations cifs_file_direct_nobrl_ops = {
839 /* BB reevaluate whether they can be done with directio, no cache */
840 .read = do_sync_read,
841 .write = do_sync_write,
842 .aio_read = cifs_user_readv,
843 .aio_write = cifs_user_writev,
845 .release = cifs_close,
848 .mmap = cifs_file_mmap,
849 .splice_read = generic_file_splice_read,
850 #ifdef CONFIG_CIFS_POSIX
851 .unlocked_ioctl = cifs_ioctl,
852 #endif /* CONFIG_CIFS_POSIX */
853 .llseek = cifs_llseek,
854 .setlease = cifs_setlease,
857 const struct file_operations cifs_dir_ops = {
858 .readdir = cifs_readdir,
859 .release = cifs_closedir,
860 .read = generic_read_dir,
861 .unlocked_ioctl = cifs_ioctl,
862 .llseek = generic_file_llseek,
866 cifs_init_once(void *inode)
868 struct cifsInodeInfo *cifsi = inode;
870 inode_init_once(&cifsi->vfs_inode);
871 INIT_LIST_HEAD(&cifsi->lockList);
875 cifs_init_inodecache(void)
877 cifs_inode_cachep = kmem_cache_create("cifs_inode_cache",
878 sizeof(struct cifsInodeInfo),
879 0, (SLAB_RECLAIM_ACCOUNT|
882 if (cifs_inode_cachep == NULL)
889 cifs_destroy_inodecache(void)
891 kmem_cache_destroy(cifs_inode_cachep);
895 cifs_init_request_bufs(void)
897 if (CIFSMaxBufSize < 8192) {
898 /* Buffer size can not be smaller than 2 * PATH_MAX since maximum
899 Unicode path name has to fit in any SMB/CIFS path based frames */
900 CIFSMaxBufSize = 8192;
901 } else if (CIFSMaxBufSize > 1024*127) {
902 CIFSMaxBufSize = 1024 * 127;
904 CIFSMaxBufSize &= 0x1FE00; /* Round size to even 512 byte mult*/
906 /* cERROR(1, "CIFSMaxBufSize %d 0x%x",CIFSMaxBufSize,CIFSMaxBufSize); */
907 cifs_req_cachep = kmem_cache_create("cifs_request",
909 MAX_CIFS_HDR_SIZE, 0,
910 SLAB_HWCACHE_ALIGN, NULL);
911 if (cifs_req_cachep == NULL)
914 if (cifs_min_rcv < 1)
916 else if (cifs_min_rcv > 64) {
918 cERROR(1, "cifs_min_rcv set to maximum (64)");
921 cifs_req_poolp = mempool_create_slab_pool(cifs_min_rcv,
924 if (cifs_req_poolp == NULL) {
925 kmem_cache_destroy(cifs_req_cachep);
928 /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and
929 almost all handle based requests (but not write response, nor is it
930 sufficient for path based requests). A smaller size would have
931 been more efficient (compacting multiple slab items on one 4k page)
932 for the case in which debug was on, but this larger size allows
933 more SMBs to use small buffer alloc and is still much more
934 efficient to alloc 1 per page off the slab compared to 17K (5page)
935 alloc of large cifs buffers even when page debugging is on */
936 cifs_sm_req_cachep = kmem_cache_create("cifs_small_rq",
937 MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN,
939 if (cifs_sm_req_cachep == NULL) {
940 mempool_destroy(cifs_req_poolp);
941 kmem_cache_destroy(cifs_req_cachep);
945 if (cifs_min_small < 2)
947 else if (cifs_min_small > 256) {
948 cifs_min_small = 256;
949 cFYI(1, "cifs_min_small set to maximum (256)");
952 cifs_sm_req_poolp = mempool_create_slab_pool(cifs_min_small,
955 if (cifs_sm_req_poolp == NULL) {
956 mempool_destroy(cifs_req_poolp);
957 kmem_cache_destroy(cifs_req_cachep);
958 kmem_cache_destroy(cifs_sm_req_cachep);
966 cifs_destroy_request_bufs(void)
968 mempool_destroy(cifs_req_poolp);
969 kmem_cache_destroy(cifs_req_cachep);
970 mempool_destroy(cifs_sm_req_poolp);
971 kmem_cache_destroy(cifs_sm_req_cachep);
977 cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids",
978 sizeof(struct mid_q_entry), 0,
979 SLAB_HWCACHE_ALIGN, NULL);
980 if (cifs_mid_cachep == NULL)
983 /* 3 is a reasonable minimum number of simultaneous operations */
984 cifs_mid_poolp = mempool_create_slab_pool(3, cifs_mid_cachep);
985 if (cifs_mid_poolp == NULL) {
986 kmem_cache_destroy(cifs_mid_cachep);
994 cifs_destroy_mids(void)
996 mempool_destroy(cifs_mid_poolp);
997 kmem_cache_destroy(cifs_mid_cachep);
1005 INIT_LIST_HEAD(&cifs_tcp_ses_list);
1006 #ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
1007 INIT_LIST_HEAD(&GlobalDnotifyReqList);
1008 INIT_LIST_HEAD(&GlobalDnotifyRsp_Q);
1009 #endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
1011 * Initialize Global counters
1013 atomic_set(&sesInfoAllocCount, 0);
1014 atomic_set(&tconInfoAllocCount, 0);
1015 atomic_set(&tcpSesAllocCount, 0);
1016 atomic_set(&tcpSesReconnectCount, 0);
1017 atomic_set(&tconInfoReconnectCount, 0);
1019 atomic_set(&bufAllocCount, 0);
1020 atomic_set(&smBufAllocCount, 0);
1021 #ifdef CONFIG_CIFS_STATS2
1022 atomic_set(&totBufAllocCount, 0);
1023 atomic_set(&totSmBufAllocCount, 0);
1024 #endif /* CONFIG_CIFS_STATS2 */
1026 atomic_set(&midCount, 0);
1027 GlobalCurrentXid = 0;
1028 GlobalTotalActiveXid = 0;
1029 GlobalMaxActiveXid = 0;
1030 spin_lock_init(&cifs_tcp_ses_lock);
1031 spin_lock_init(&cifs_file_list_lock);
1032 spin_lock_init(&GlobalMid_Lock);
1034 if (cifs_max_pending < 2) {
1035 cifs_max_pending = 2;
1036 cFYI(1, "cifs_max_pending set to min of 2");
1037 } else if (cifs_max_pending > 256) {
1038 cifs_max_pending = 256;
1039 cFYI(1, "cifs_max_pending set to max of 256");
1042 rc = cifs_fscache_register();
1044 goto out_clean_proc;
1046 rc = cifs_init_inodecache();
1048 goto out_unreg_fscache;
1050 rc = cifs_init_mids();
1052 goto out_destroy_inodecache;
1054 rc = cifs_init_request_bufs();
1056 goto out_destroy_mids;
1058 #ifdef CONFIG_CIFS_UPCALL
1059 rc = register_key_type(&cifs_spnego_key_type);
1061 goto out_destroy_request_bufs;
1062 #endif /* CONFIG_CIFS_UPCALL */
1064 #ifdef CONFIG_CIFS_ACL
1065 rc = init_cifs_idmap();
1067 goto out_register_key_type;
1068 #endif /* CONFIG_CIFS_ACL */
1070 rc = register_filesystem(&cifs_fs_type);
1072 goto out_init_cifs_idmap;
1076 out_init_cifs_idmap:
1077 #ifdef CONFIG_CIFS_ACL
1079 out_register_key_type:
1081 #ifdef CONFIG_CIFS_UPCALL
1082 unregister_key_type(&cifs_spnego_key_type);
1083 out_destroy_request_bufs:
1085 cifs_destroy_request_bufs();
1087 cifs_destroy_mids();
1088 out_destroy_inodecache:
1089 cifs_destroy_inodecache();
1091 cifs_fscache_unregister();
1100 cFYI(DBG2, "exit_cifs");
1102 cifs_fscache_unregister();
1103 #ifdef CONFIG_CIFS_DFS_UPCALL
1104 cifs_dfs_release_automount_timer();
1106 #ifdef CONFIG_CIFS_ACL
1107 cifs_destroy_idmaptrees();
1110 #ifdef CONFIG_CIFS_UPCALL
1111 unregister_key_type(&cifs_spnego_key_type);
1113 unregister_filesystem(&cifs_fs_type);
1114 cifs_destroy_inodecache();
1115 cifs_destroy_mids();
1116 cifs_destroy_request_bufs();
1119 MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>");
1120 MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */
1122 ("VFS to access servers complying with the SNIA CIFS Specification "
1123 "e.g. Samba and Windows");
1124 MODULE_VERSION(CIFS_VERSION);
1125 module_init(init_cifs)
1126 module_exit(exit_cifs)