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/smp_lock.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 unsigned int oplockEnabled = 1;
57 unsigned int experimEnabled = 0;
58 unsigned int linuxExtEnabled = 1;
59 unsigned int lookupCacheEnabled = 1;
60 unsigned int multiuser_mount = 0;
61 unsigned int global_secflags = CIFSSEC_DEF;
62 /* unsigned int ntlmv2_support = 0; */
63 unsigned int sign_CIFS_PDUs = 1;
64 static const struct super_operations cifs_super_ops;
65 unsigned int CIFSMaxBufSize = CIFS_MAX_MSGSIZE;
66 module_param(CIFSMaxBufSize, int, 0);
67 MODULE_PARM_DESC(CIFSMaxBufSize, "Network buffer size (not including header). "
68 "Default: 16384 Range: 8192 to 130048");
69 unsigned int cifs_min_rcv = CIFS_MIN_RCV_POOL;
70 module_param(cifs_min_rcv, int, 0);
71 MODULE_PARM_DESC(cifs_min_rcv, "Network buffers in pool. Default: 4 Range: "
73 unsigned int cifs_min_small = 30;
74 module_param(cifs_min_small, int, 0);
75 MODULE_PARM_DESC(cifs_min_small, "Small network buffers in pool. Default: 30 "
77 unsigned int cifs_max_pending = CIFS_MAX_REQ;
78 module_param(cifs_max_pending, int, 0);
79 MODULE_PARM_DESC(cifs_max_pending, "Simultaneous requests to server. "
80 "Default: 50 Range: 2 to 256");
82 extern mempool_t *cifs_sm_req_poolp;
83 extern mempool_t *cifs_req_poolp;
84 extern mempool_t *cifs_mid_poolp;
87 cifs_read_super(struct super_block *sb, void *data,
88 const char *devname, int silent)
91 struct cifs_sb_info *cifs_sb;
94 /* BB should we make this contingent on mount parm? */
95 sb->s_flags |= MS_NODIRATIME | MS_NOATIME;
96 sb->s_fs_info = kzalloc(sizeof(struct cifs_sb_info), GFP_KERNEL);
97 cifs_sb = CIFS_SB(sb);
101 rc = bdi_setup_and_register(&cifs_sb->bdi, "cifs", BDI_CAP_MAP_COPY);
107 #ifdef CONFIG_CIFS_DFS_UPCALL
108 /* copy mount params to sb for use in submounts */
109 /* BB: should we move this after the mount so we
110 * do not have to do the copy on failed mounts?
111 * BB: May be it is better to do simple copy before
112 * complex operation (mount), and in case of fail
113 * just exit instead of doing mount and attempting
114 * undo it if this copy fails?*/
116 int len = strlen(data);
117 cifs_sb->mountdata = kzalloc(len + 1, GFP_KERNEL);
118 if (cifs_sb->mountdata == NULL) {
119 bdi_destroy(&cifs_sb->bdi);
120 kfree(sb->s_fs_info);
121 sb->s_fs_info = NULL;
124 strncpy(cifs_sb->mountdata, data, len + 1);
125 cifs_sb->mountdata[len] = '\0';
129 rc = cifs_mount(sb, cifs_sb, data, devname);
133 cERROR(1, "cifs_mount failed w/return code = %d", rc);
134 goto out_mount_failed;
137 sb->s_magic = CIFS_MAGIC_NUMBER;
138 sb->s_op = &cifs_super_ops;
139 sb->s_bdi = &cifs_sb->bdi;
140 sb->s_blocksize = CIFS_MAX_MSGSIZE;
141 sb->s_blocksize_bits = 14; /* default 2**14 = CIFS_MAX_MSGSIZE */
142 inode = cifs_root_iget(sb, ROOT_I);
150 sb->s_root = d_alloc_root(inode);
157 #ifdef CONFIG_CIFS_EXPERIMENTAL
158 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
159 cFYI(1, "export ops supported");
160 sb->s_export_op = &cifs_export_ops;
162 #endif /* EXPERIMENTAL */
167 cERROR(1, "cifs_read_super: get root inode failed");
171 cifs_umount(sb, cifs_sb);
175 #ifdef CONFIG_CIFS_DFS_UPCALL
176 if (cifs_sb->mountdata) {
177 kfree(cifs_sb->mountdata);
178 cifs_sb->mountdata = NULL;
181 unload_nls(cifs_sb->local_nls);
182 bdi_destroy(&cifs_sb->bdi);
189 cifs_put_super(struct super_block *sb)
192 struct cifs_sb_info *cifs_sb;
194 cFYI(1, "In cifs_put_super");
195 cifs_sb = CIFS_SB(sb);
196 if (cifs_sb == NULL) {
197 cFYI(1, "Empty cifs superblock info passed to unmount");
203 rc = cifs_umount(sb, cifs_sb);
205 cERROR(1, "cifs_umount failed with return code %d", rc);
206 #ifdef CONFIG_CIFS_DFS_UPCALL
207 if (cifs_sb->mountdata) {
208 kfree(cifs_sb->mountdata);
209 cifs_sb->mountdata = NULL;
213 unload_nls(cifs_sb->local_nls);
214 bdi_destroy(&cifs_sb->bdi);
221 cifs_statfs(struct dentry *dentry, struct kstatfs *buf)
223 struct super_block *sb = dentry->d_sb;
224 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
225 struct cifsTconInfo *tcon = cifs_sb_master_tcon(cifs_sb);
226 int rc = -EOPNOTSUPP;
231 buf->f_type = CIFS_MAGIC_NUMBER;
234 * PATH_MAX may be too long - it would presumably be total path,
235 * but note that some servers (includinng Samba 3) have a shorter
238 * Instead could get the real value via SMB_QUERY_FS_ATTRIBUTE_INFO.
240 buf->f_namelen = PATH_MAX;
241 buf->f_files = 0; /* undefined */
242 buf->f_ffree = 0; /* unlimited */
245 * We could add a second check for a QFS Unix capability bit
247 if ((tcon->ses->capabilities & CAP_UNIX) &&
248 (CIFS_POSIX_EXTENSIONS & le64_to_cpu(tcon->fsUnixInfo.Capability)))
249 rc = CIFSSMBQFSPosixInfo(xid, tcon, buf);
252 * Only need to call the old QFSInfo if failed on newer one,
255 if (rc && (tcon->ses->capabilities & CAP_NT_SMBS))
256 rc = CIFSSMBQFSInfo(xid, tcon, buf);
259 * Some old Windows servers also do not support level 103, retry with
260 * older level one if old server failed the previous call or we
261 * bypassed it because we detected that this was an older LANMAN sess
264 rc = SMBOldQFSInfo(xid, tcon, buf);
270 static int cifs_permission(struct inode *inode, int mask)
272 struct cifs_sb_info *cifs_sb;
274 cifs_sb = CIFS_SB(inode->i_sb);
276 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) {
277 if ((mask & MAY_EXEC) && !execute_ok(inode))
281 } else /* file mode might have been restricted at mount time
282 on the client (above and beyond ACL on servers) for
283 servers which do not support setting and viewing mode bits,
284 so allowing client to check permissions is useful */
285 return generic_permission(inode, mask, NULL);
288 static struct kmem_cache *cifs_inode_cachep;
289 static struct kmem_cache *cifs_req_cachep;
290 static struct kmem_cache *cifs_mid_cachep;
291 static struct kmem_cache *cifs_sm_req_cachep;
292 mempool_t *cifs_sm_req_poolp;
293 mempool_t *cifs_req_poolp;
294 mempool_t *cifs_mid_poolp;
296 static struct inode *
297 cifs_alloc_inode(struct super_block *sb)
299 struct cifsInodeInfo *cifs_inode;
300 cifs_inode = kmem_cache_alloc(cifs_inode_cachep, GFP_KERNEL);
303 cifs_inode->cifsAttrs = 0x20; /* default */
304 cifs_inode->time = 0;
305 cifs_inode->write_behind_rc = 0;
306 /* Until the file is open and we have gotten oplock
307 info back from the server, can not assume caching of
308 file data or metadata */
309 cifs_inode->clientCanCacheRead = false;
310 cifs_inode->clientCanCacheAll = false;
311 cifs_inode->delete_pending = false;
312 cifs_inode->invalid_mapping = false;
313 cifs_inode->vfs_inode.i_blkbits = 14; /* 2**14 = CIFS_MAX_MSGSIZE */
314 cifs_inode->server_eof = 0;
316 /* Can not set i_flags here - they get immediately overwritten
317 to zero by the VFS */
318 /* cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME;*/
319 INIT_LIST_HEAD(&cifs_inode->openFileList);
320 return &cifs_inode->vfs_inode;
324 cifs_destroy_inode(struct inode *inode)
326 kmem_cache_free(cifs_inode_cachep, CIFS_I(inode));
330 cifs_evict_inode(struct inode *inode)
332 truncate_inode_pages(&inode->i_data, 0);
333 end_writeback(inode);
334 cifs_fscache_release_inode_cookie(inode);
338 cifs_show_address(struct seq_file *s, struct TCP_Server_Info *server)
340 seq_printf(s, ",addr=");
342 switch (server->addr.sockAddr.sin_family) {
344 seq_printf(s, "%pI4", &server->addr.sockAddr.sin_addr.s_addr);
347 seq_printf(s, "%pI6",
348 &server->addr.sockAddr6.sin6_addr.s6_addr);
349 if (server->addr.sockAddr6.sin6_scope_id)
350 seq_printf(s, "%%%u",
351 server->addr.sockAddr6.sin6_scope_id);
354 seq_printf(s, "(unknown)");
359 * cifs_show_options() is for displaying mount options in /proc/mounts.
360 * Not all settable options are displayed but most of the important
364 cifs_show_options(struct seq_file *s, struct vfsmount *m)
366 struct cifs_sb_info *cifs_sb = CIFS_SB(m->mnt_sb);
367 struct cifsTconInfo *tcon = cifs_sb_master_tcon(cifs_sb);
368 struct sockaddr *srcaddr;
369 srcaddr = (struct sockaddr *)&tcon->ses->server->srcaddr;
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->userName)
376 seq_printf(s, ",username=%s", tcon->ses->userName);
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");
421 if (cifs_sb->prepath)
422 seq_printf(s, ",prepath=%s", cifs_sb->prepath);
423 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
424 seq_printf(s, ",posixpaths");
425 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)
426 seq_printf(s, ",setuids");
427 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
428 seq_printf(s, ",serverino");
429 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO)
430 seq_printf(s, ",directio");
431 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
432 seq_printf(s, ",nouser_xattr");
433 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR)
434 seq_printf(s, ",mapchars");
435 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)
436 seq_printf(s, ",sfu");
437 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
438 seq_printf(s, ",nobrl");
439 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
440 seq_printf(s, ",cifsacl");
441 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)
442 seq_printf(s, ",dynperm");
443 if (m->mnt_sb->s_flags & MS_POSIXACL)
444 seq_printf(s, ",acl");
445 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS)
446 seq_printf(s, ",mfsymlinks");
448 seq_printf(s, ",rsize=%d", cifs_sb->rsize);
449 seq_printf(s, ",wsize=%d", cifs_sb->wsize);
454 static void cifs_umount_begin(struct super_block *sb)
456 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
457 struct cifsTconInfo *tcon;
462 tcon = cifs_sb_master_tcon(cifs_sb);
464 read_lock(&cifs_tcp_ses_lock);
465 if ((tcon->tc_count > 1) || (tcon->tidStatus == CifsExiting)) {
466 /* we have other mounts to same share or we have
467 already tried to force umount this and woken up
468 all waiting network requests, nothing to do */
469 read_unlock(&cifs_tcp_ses_lock);
471 } else if (tcon->tc_count == 1)
472 tcon->tidStatus = CifsExiting;
473 read_unlock(&cifs_tcp_ses_lock);
475 /* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */
476 /* cancel_notify_requests(tcon); */
477 if (tcon->ses && tcon->ses->server) {
478 cFYI(1, "wake up tasks now - umount begin not complete");
479 wake_up_all(&tcon->ses->server->request_q);
480 wake_up_all(&tcon->ses->server->response_q);
481 msleep(1); /* yield */
482 /* we have to kick the requests once more */
483 wake_up_all(&tcon->ses->server->response_q);
490 #ifdef CONFIG_CIFS_STATS2
491 static int cifs_show_stats(struct seq_file *s, struct vfsmount *mnt)
498 static int cifs_remount(struct super_block *sb, int *flags, char *data)
500 *flags |= MS_NODIRATIME;
504 static int cifs_drop_inode(struct inode *inode)
506 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
508 /* no serverino => unconditional eviction */
509 return !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) ||
510 generic_drop_inode(inode);
513 static const struct super_operations cifs_super_ops = {
514 .put_super = cifs_put_super,
515 .statfs = cifs_statfs,
516 .alloc_inode = cifs_alloc_inode,
517 .destroy_inode = cifs_destroy_inode,
518 .drop_inode = cifs_drop_inode,
519 .evict_inode = cifs_evict_inode,
520 /* .delete_inode = cifs_delete_inode, */ /* Do not need above
521 function unless later we add lazy close of inodes or unless the
522 kernel forgets to call us with the same number of releases (closes)
524 .show_options = cifs_show_options,
525 .umount_begin = cifs_umount_begin,
526 .remount_fs = cifs_remount,
527 #ifdef CONFIG_CIFS_STATS2
528 .show_stats = cifs_show_stats,
533 cifs_get_sb(struct file_system_type *fs_type,
534 int flags, const char *dev_name, void *data, struct vfsmount *mnt)
537 struct super_block *sb = sget(fs_type, NULL, set_anon_super, NULL);
539 cFYI(1, "Devname: %s flags: %d ", dev_name, flags);
546 rc = cifs_read_super(sb, data, dev_name, flags & MS_SILENT ? 1 : 0);
548 deactivate_locked_super(sb);
551 sb->s_flags |= MS_ACTIVE;
552 simple_set_mnt(mnt, sb);
556 static ssize_t cifs_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
557 unsigned long nr_segs, loff_t pos)
559 struct inode *inode = iocb->ki_filp->f_path.dentry->d_inode;
562 written = generic_file_aio_write(iocb, iov, nr_segs, pos);
563 if (!CIFS_I(inode)->clientCanCacheAll)
564 filemap_fdatawrite(inode->i_mapping);
568 static loff_t cifs_llseek(struct file *file, loff_t offset, int origin)
570 /* origin == SEEK_END => we must revalidate the cached file length */
571 if (origin == SEEK_END) {
574 /* some applications poll for the file length in this strange
575 way so we must seek to end on non-oplocked files by
576 setting the revalidate time to zero */
577 CIFS_I(file->f_path.dentry->d_inode)->time = 0;
579 retval = cifs_revalidate_file(file);
581 return (loff_t)retval;
583 return generic_file_llseek_unlocked(file, offset, origin);
586 static int cifs_setlease(struct file *file, long arg, struct file_lock **lease)
588 /* note that this is called by vfs setlease with the BKL held
589 although I doubt that BKL is needed here in cifs */
590 struct inode *inode = file->f_path.dentry->d_inode;
591 struct cifsFileInfo *cfile = file->private_data;
593 if (!(S_ISREG(inode->i_mode)))
596 /* check if file is oplocked */
597 if (((arg == F_RDLCK) &&
598 (CIFS_I(inode)->clientCanCacheRead)) ||
600 (CIFS_I(inode)->clientCanCacheAll)))
601 return generic_setlease(file, arg, lease);
602 else if (tlink_tcon(cfile->tlink)->local_lease &&
603 !CIFS_I(inode)->clientCanCacheRead)
604 /* If the server claims to support oplock on this
605 file, then we still need to check oplock even
606 if the local_lease mount option is set, but there
607 are servers which do not support oplock for which
608 this mount option may be useful if the user
609 knows that the file won't be changed on the server
611 return generic_setlease(file, arg, lease);
616 struct file_system_type cifs_fs_type = {
617 .owner = THIS_MODULE,
619 .get_sb = cifs_get_sb,
620 .kill_sb = kill_anon_super,
623 const struct inode_operations cifs_dir_inode_ops = {
624 .create = cifs_create,
625 .lookup = cifs_lookup,
626 .getattr = cifs_getattr,
627 .unlink = cifs_unlink,
628 .link = cifs_hardlink,
631 .rename = cifs_rename,
632 .permission = cifs_permission,
633 /* revalidate:cifs_revalidate, */
634 .setattr = cifs_setattr,
635 .symlink = cifs_symlink,
637 #ifdef CONFIG_CIFS_XATTR
638 .setxattr = cifs_setxattr,
639 .getxattr = cifs_getxattr,
640 .listxattr = cifs_listxattr,
641 .removexattr = cifs_removexattr,
645 const struct inode_operations cifs_file_inode_ops = {
646 /* revalidate:cifs_revalidate, */
647 .setattr = cifs_setattr,
648 .getattr = cifs_getattr, /* do we need this anymore? */
649 .rename = cifs_rename,
650 .permission = cifs_permission,
651 #ifdef CONFIG_CIFS_XATTR
652 .setxattr = cifs_setxattr,
653 .getxattr = cifs_getxattr,
654 .listxattr = cifs_listxattr,
655 .removexattr = cifs_removexattr,
659 const struct inode_operations cifs_symlink_inode_ops = {
660 .readlink = generic_readlink,
661 .follow_link = cifs_follow_link,
662 .put_link = cifs_put_link,
663 .permission = cifs_permission,
664 /* BB add the following two eventually */
665 /* revalidate: cifs_revalidate,
666 setattr: cifs_notify_change, *//* BB do we need notify change */
667 #ifdef CONFIG_CIFS_XATTR
668 .setxattr = cifs_setxattr,
669 .getxattr = cifs_getxattr,
670 .listxattr = cifs_listxattr,
671 .removexattr = cifs_removexattr,
675 const struct file_operations cifs_file_ops = {
676 .read = do_sync_read,
677 .write = do_sync_write,
678 .aio_read = generic_file_aio_read,
679 .aio_write = cifs_file_aio_write,
681 .release = cifs_close,
685 .mmap = cifs_file_mmap,
686 .splice_read = generic_file_splice_read,
687 .llseek = cifs_llseek,
688 #ifdef CONFIG_CIFS_POSIX
689 .unlocked_ioctl = cifs_ioctl,
690 #endif /* CONFIG_CIFS_POSIX */
691 .setlease = cifs_setlease,
694 const struct file_operations cifs_file_direct_ops = {
695 /* no aio, no readv -
696 BB reevaluate whether they can be done with directio, no cache */
697 .read = cifs_user_read,
698 .write = cifs_user_write,
700 .release = cifs_close,
704 .mmap = cifs_file_mmap,
705 .splice_read = generic_file_splice_read,
706 #ifdef CONFIG_CIFS_POSIX
707 .unlocked_ioctl = cifs_ioctl,
708 #endif /* CONFIG_CIFS_POSIX */
709 .llseek = cifs_llseek,
710 .setlease = cifs_setlease,
712 const struct file_operations cifs_file_nobrl_ops = {
713 .read = do_sync_read,
714 .write = do_sync_write,
715 .aio_read = generic_file_aio_read,
716 .aio_write = cifs_file_aio_write,
718 .release = cifs_close,
721 .mmap = cifs_file_mmap,
722 .splice_read = generic_file_splice_read,
723 .llseek = cifs_llseek,
724 #ifdef CONFIG_CIFS_POSIX
725 .unlocked_ioctl = cifs_ioctl,
726 #endif /* CONFIG_CIFS_POSIX */
727 .setlease = cifs_setlease,
730 const struct file_operations cifs_file_direct_nobrl_ops = {
731 /* no mmap, no aio, no readv -
732 BB reevaluate whether they can be done with directio, no cache */
733 .read = cifs_user_read,
734 .write = cifs_user_write,
736 .release = cifs_close,
739 .mmap = cifs_file_mmap,
740 .splice_read = generic_file_splice_read,
741 #ifdef CONFIG_CIFS_POSIX
742 .unlocked_ioctl = cifs_ioctl,
743 #endif /* CONFIG_CIFS_POSIX */
744 .llseek = cifs_llseek,
745 .setlease = cifs_setlease,
748 const struct file_operations cifs_dir_ops = {
749 .readdir = cifs_readdir,
750 .release = cifs_closedir,
751 .read = generic_read_dir,
752 .unlocked_ioctl = cifs_ioctl,
753 .llseek = generic_file_llseek,
757 cifs_init_once(void *inode)
759 struct cifsInodeInfo *cifsi = inode;
761 inode_init_once(&cifsi->vfs_inode);
762 INIT_LIST_HEAD(&cifsi->lockList);
766 cifs_init_inodecache(void)
768 cifs_inode_cachep = kmem_cache_create("cifs_inode_cache",
769 sizeof(struct cifsInodeInfo),
770 0, (SLAB_RECLAIM_ACCOUNT|
773 if (cifs_inode_cachep == NULL)
780 cifs_destroy_inodecache(void)
782 kmem_cache_destroy(cifs_inode_cachep);
786 cifs_init_request_bufs(void)
788 if (CIFSMaxBufSize < 8192) {
789 /* Buffer size can not be smaller than 2 * PATH_MAX since maximum
790 Unicode path name has to fit in any SMB/CIFS path based frames */
791 CIFSMaxBufSize = 8192;
792 } else if (CIFSMaxBufSize > 1024*127) {
793 CIFSMaxBufSize = 1024 * 127;
795 CIFSMaxBufSize &= 0x1FE00; /* Round size to even 512 byte mult*/
797 /* cERROR(1, "CIFSMaxBufSize %d 0x%x",CIFSMaxBufSize,CIFSMaxBufSize); */
798 cifs_req_cachep = kmem_cache_create("cifs_request",
800 MAX_CIFS_HDR_SIZE, 0,
801 SLAB_HWCACHE_ALIGN, NULL);
802 if (cifs_req_cachep == NULL)
805 if (cifs_min_rcv < 1)
807 else if (cifs_min_rcv > 64) {
809 cERROR(1, "cifs_min_rcv set to maximum (64)");
812 cifs_req_poolp = mempool_create_slab_pool(cifs_min_rcv,
815 if (cifs_req_poolp == NULL) {
816 kmem_cache_destroy(cifs_req_cachep);
819 /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and
820 almost all handle based requests (but not write response, nor is it
821 sufficient for path based requests). A smaller size would have
822 been more efficient (compacting multiple slab items on one 4k page)
823 for the case in which debug was on, but this larger size allows
824 more SMBs to use small buffer alloc and is still much more
825 efficient to alloc 1 per page off the slab compared to 17K (5page)
826 alloc of large cifs buffers even when page debugging is on */
827 cifs_sm_req_cachep = kmem_cache_create("cifs_small_rq",
828 MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN,
830 if (cifs_sm_req_cachep == NULL) {
831 mempool_destroy(cifs_req_poolp);
832 kmem_cache_destroy(cifs_req_cachep);
836 if (cifs_min_small < 2)
838 else if (cifs_min_small > 256) {
839 cifs_min_small = 256;
840 cFYI(1, "cifs_min_small set to maximum (256)");
843 cifs_sm_req_poolp = mempool_create_slab_pool(cifs_min_small,
846 if (cifs_sm_req_poolp == NULL) {
847 mempool_destroy(cifs_req_poolp);
848 kmem_cache_destroy(cifs_req_cachep);
849 kmem_cache_destroy(cifs_sm_req_cachep);
857 cifs_destroy_request_bufs(void)
859 mempool_destroy(cifs_req_poolp);
860 kmem_cache_destroy(cifs_req_cachep);
861 mempool_destroy(cifs_sm_req_poolp);
862 kmem_cache_destroy(cifs_sm_req_cachep);
868 cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids",
869 sizeof(struct mid_q_entry), 0,
870 SLAB_HWCACHE_ALIGN, NULL);
871 if (cifs_mid_cachep == NULL)
874 /* 3 is a reasonable minimum number of simultaneous operations */
875 cifs_mid_poolp = mempool_create_slab_pool(3, cifs_mid_cachep);
876 if (cifs_mid_poolp == NULL) {
877 kmem_cache_destroy(cifs_mid_cachep);
885 cifs_destroy_mids(void)
887 mempool_destroy(cifs_mid_poolp);
888 kmem_cache_destroy(cifs_mid_cachep);
896 INIT_LIST_HEAD(&cifs_tcp_ses_list);
897 #ifdef CONFIG_CIFS_EXPERIMENTAL
898 INIT_LIST_HEAD(&GlobalDnotifyReqList);
899 INIT_LIST_HEAD(&GlobalDnotifyRsp_Q);
902 * Initialize Global counters
904 atomic_set(&sesInfoAllocCount, 0);
905 atomic_set(&tconInfoAllocCount, 0);
906 atomic_set(&tcpSesAllocCount, 0);
907 atomic_set(&tcpSesReconnectCount, 0);
908 atomic_set(&tconInfoReconnectCount, 0);
910 atomic_set(&bufAllocCount, 0);
911 atomic_set(&smBufAllocCount, 0);
912 #ifdef CONFIG_CIFS_STATS2
913 atomic_set(&totBufAllocCount, 0);
914 atomic_set(&totSmBufAllocCount, 0);
915 #endif /* CONFIG_CIFS_STATS2 */
917 atomic_set(&midCount, 0);
918 GlobalCurrentXid = 0;
919 GlobalTotalActiveXid = 0;
920 GlobalMaxActiveXid = 0;
921 memset(Local_System_Name, 0, 15);
922 rwlock_init(&GlobalSMBSeslock);
923 rwlock_init(&cifs_tcp_ses_lock);
924 spin_lock_init(&GlobalMid_Lock);
926 if (cifs_max_pending < 2) {
927 cifs_max_pending = 2;
928 cFYI(1, "cifs_max_pending set to min of 2");
929 } else if (cifs_max_pending > 256) {
930 cifs_max_pending = 256;
931 cFYI(1, "cifs_max_pending set to max of 256");
934 rc = cifs_fscache_register();
938 rc = cifs_init_inodecache();
940 goto out_unreg_fscache;
942 rc = cifs_init_mids();
944 goto out_destroy_inodecache;
946 rc = cifs_init_request_bufs();
948 goto out_destroy_mids;
950 rc = register_filesystem(&cifs_fs_type);
952 goto out_destroy_request_bufs;
953 #ifdef CONFIG_CIFS_UPCALL
954 rc = register_key_type(&cifs_spnego_key_type);
956 goto out_unregister_filesystem;
961 #ifdef CONFIG_CIFS_UPCALL
962 out_unregister_filesystem:
963 unregister_filesystem(&cifs_fs_type);
965 out_destroy_request_bufs:
966 cifs_destroy_request_bufs();
969 out_destroy_inodecache:
970 cifs_destroy_inodecache();
972 cifs_fscache_unregister();
981 cFYI(DBG2, "exit_cifs");
983 cifs_fscache_unregister();
984 #ifdef CONFIG_CIFS_DFS_UPCALL
985 cifs_dfs_release_automount_timer();
987 #ifdef CONFIG_CIFS_UPCALL
988 unregister_key_type(&cifs_spnego_key_type);
990 unregister_filesystem(&cifs_fs_type);
991 cifs_destroy_inodecache();
993 cifs_destroy_request_bufs();
996 MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>");
997 MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */
999 ("VFS to access servers complying with the SNIA CIFS Specification "
1000 "e.g. Samba and Windows");
1001 MODULE_VERSION(CIFS_VERSION);
1002 module_init(init_cifs)
1003 module_exit(exit_cifs)