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 experimEnabled = 0;
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, 0);
78 MODULE_PARM_DESC(cifs_max_pending, "Simultaneous requests to server. "
79 "Default: 50 Range: 2 to 256");
81 extern mempool_t *cifs_sm_req_poolp;
82 extern mempool_t *cifs_req_poolp;
83 extern mempool_t *cifs_mid_poolp;
86 cifs_sb_active(struct super_block *sb)
88 struct cifs_sb_info *server = CIFS_SB(sb);
90 if (atomic_inc_return(&server->active) == 1)
91 atomic_inc(&sb->s_active);
95 cifs_sb_deactive(struct super_block *sb)
97 struct cifs_sb_info *server = CIFS_SB(sb);
99 if (atomic_dec_and_test(&server->active))
100 deactivate_super(sb);
104 cifs_read_super(struct super_block *sb, void *data,
105 const char *devname, int silent)
108 struct cifs_sb_info *cifs_sb;
111 /* BB should we make this contingent on mount parm? */
112 sb->s_flags |= MS_NODIRATIME | MS_NOATIME;
113 sb->s_fs_info = kzalloc(sizeof(struct cifs_sb_info), GFP_KERNEL);
114 cifs_sb = CIFS_SB(sb);
118 spin_lock_init(&cifs_sb->tlink_tree_lock);
119 cifs_sb->tlink_tree = RB_ROOT;
121 rc = bdi_setup_and_register(&cifs_sb->bdi, "cifs", BDI_CAP_MAP_COPY);
127 #ifdef CONFIG_CIFS_DFS_UPCALL
128 /* copy mount params to sb for use in submounts */
129 /* BB: should we move this after the mount so we
130 * do not have to do the copy on failed mounts?
131 * BB: May be it is better to do simple copy before
132 * complex operation (mount), and in case of fail
133 * just exit instead of doing mount and attempting
134 * undo it if this copy fails?*/
136 int len = strlen(data);
137 cifs_sb->mountdata = kzalloc(len + 1, GFP_KERNEL);
138 if (cifs_sb->mountdata == NULL) {
139 bdi_destroy(&cifs_sb->bdi);
140 kfree(sb->s_fs_info);
141 sb->s_fs_info = NULL;
144 strncpy(cifs_sb->mountdata, data, len + 1);
145 cifs_sb->mountdata[len] = '\0';
149 rc = cifs_mount(sb, cifs_sb, data, devname);
153 cERROR(1, "cifs_mount failed w/return code = %d", rc);
154 goto out_mount_failed;
157 sb->s_magic = CIFS_MAGIC_NUMBER;
158 sb->s_op = &cifs_super_ops;
159 sb->s_bdi = &cifs_sb->bdi;
160 sb->s_blocksize = CIFS_MAX_MSGSIZE;
161 sb->s_blocksize_bits = 14; /* default 2**14 = CIFS_MAX_MSGSIZE */
162 inode = cifs_root_iget(sb, ROOT_I);
170 sb->s_root = d_alloc_root(inode);
177 /* do that *after* d_alloc_root() - we want NULL ->d_op for root here */
178 if (cifs_sb_master_tcon(cifs_sb)->nocase)
179 sb->s_d_op = &cifs_ci_dentry_ops;
181 sb->s_d_op = &cifs_dentry_ops;
183 #ifdef CONFIG_CIFS_EXPERIMENTAL
184 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
185 cFYI(1, "export ops supported");
186 sb->s_export_op = &cifs_export_ops;
188 #endif /* EXPERIMENTAL */
193 cERROR(1, "cifs_read_super: get root inode failed");
197 cifs_umount(sb, cifs_sb);
201 #ifdef CONFIG_CIFS_DFS_UPCALL
202 if (cifs_sb->mountdata) {
203 kfree(cifs_sb->mountdata);
204 cifs_sb->mountdata = NULL;
207 unload_nls(cifs_sb->local_nls);
208 bdi_destroy(&cifs_sb->bdi);
215 cifs_put_super(struct super_block *sb)
218 struct cifs_sb_info *cifs_sb;
220 cFYI(1, "In cifs_put_super");
221 cifs_sb = CIFS_SB(sb);
222 if (cifs_sb == NULL) {
223 cFYI(1, "Empty cifs superblock info passed to unmount");
227 rc = cifs_umount(sb, cifs_sb);
229 cERROR(1, "cifs_umount failed with return code %d", rc);
230 #ifdef CONFIG_CIFS_DFS_UPCALL
231 if (cifs_sb->mountdata) {
232 kfree(cifs_sb->mountdata);
233 cifs_sb->mountdata = NULL;
237 unload_nls(cifs_sb->local_nls);
238 bdi_destroy(&cifs_sb->bdi);
243 cifs_statfs(struct dentry *dentry, struct kstatfs *buf)
245 struct super_block *sb = dentry->d_sb;
246 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
247 struct cifsTconInfo *tcon = cifs_sb_master_tcon(cifs_sb);
248 int rc = -EOPNOTSUPP;
253 buf->f_type = CIFS_MAGIC_NUMBER;
256 * PATH_MAX may be too long - it would presumably be total path,
257 * but note that some servers (includinng Samba 3) have a shorter
260 * Instead could get the real value via SMB_QUERY_FS_ATTRIBUTE_INFO.
262 buf->f_namelen = PATH_MAX;
263 buf->f_files = 0; /* undefined */
264 buf->f_ffree = 0; /* unlimited */
267 * We could add a second check for a QFS Unix capability bit
269 if ((tcon->ses->capabilities & CAP_UNIX) &&
270 (CIFS_POSIX_EXTENSIONS & le64_to_cpu(tcon->fsUnixInfo.Capability)))
271 rc = CIFSSMBQFSPosixInfo(xid, tcon, buf);
274 * Only need to call the old QFSInfo if failed on newer one,
277 if (rc && (tcon->ses->capabilities & CAP_NT_SMBS))
278 rc = CIFSSMBQFSInfo(xid, tcon, buf);
281 * Some old Windows servers also do not support level 103, retry with
282 * older level one if old server failed the previous call or we
283 * bypassed it because we detected that this was an older LANMAN sess
286 rc = SMBOldQFSInfo(xid, tcon, buf);
292 static int cifs_permission(struct inode *inode, int mask, unsigned int flags)
294 struct cifs_sb_info *cifs_sb;
296 if (flags & IPERM_FLAG_RCU)
299 cifs_sb = CIFS_SB(inode->i_sb);
301 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) {
302 if ((mask & MAY_EXEC) && !execute_ok(inode))
306 } else /* file mode might have been restricted at mount time
307 on the client (above and beyond ACL on servers) for
308 servers which do not support setting and viewing mode bits,
309 so allowing client to check permissions is useful */
310 return generic_permission(inode, mask, flags, NULL);
313 static struct kmem_cache *cifs_inode_cachep;
314 static struct kmem_cache *cifs_req_cachep;
315 static struct kmem_cache *cifs_mid_cachep;
316 static struct kmem_cache *cifs_sm_req_cachep;
317 mempool_t *cifs_sm_req_poolp;
318 mempool_t *cifs_req_poolp;
319 mempool_t *cifs_mid_poolp;
321 static struct inode *
322 cifs_alloc_inode(struct super_block *sb)
324 struct cifsInodeInfo *cifs_inode;
325 cifs_inode = kmem_cache_alloc(cifs_inode_cachep, GFP_KERNEL);
328 cifs_inode->cifsAttrs = 0x20; /* default */
329 cifs_inode->time = 0;
330 /* Until the file is open and we have gotten oplock
331 info back from the server, can not assume caching of
332 file data or metadata */
333 cifs_set_oplock_level(cifs_inode, 0);
334 cifs_inode->delete_pending = false;
335 cifs_inode->invalid_mapping = false;
336 cifs_inode->vfs_inode.i_blkbits = 14; /* 2**14 = CIFS_MAX_MSGSIZE */
337 cifs_inode->server_eof = 0;
338 cifs_inode->uniqueid = 0;
339 cifs_inode->createtime = 0;
341 /* Can not set i_flags here - they get immediately overwritten
342 to zero by the VFS */
343 /* cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME;*/
344 INIT_LIST_HEAD(&cifs_inode->openFileList);
345 return &cifs_inode->vfs_inode;
348 static void cifs_i_callback(struct rcu_head *head)
350 struct inode *inode = container_of(head, struct inode, i_rcu);
351 INIT_LIST_HEAD(&inode->i_dentry);
352 kmem_cache_free(cifs_inode_cachep, CIFS_I(inode));
356 cifs_destroy_inode(struct inode *inode)
358 call_rcu(&inode->i_rcu, cifs_i_callback);
362 cifs_evict_inode(struct inode *inode)
364 truncate_inode_pages(&inode->i_data, 0);
365 end_writeback(inode);
366 cifs_fscache_release_inode_cookie(inode);
370 cifs_show_address(struct seq_file *s, struct TCP_Server_Info *server)
372 struct sockaddr_in *sa = (struct sockaddr_in *) &server->dstaddr;
373 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *) &server->dstaddr;
375 seq_printf(s, ",addr=");
377 switch (server->dstaddr.ss_family) {
379 seq_printf(s, "%pI4", &sa->sin_addr.s_addr);
382 seq_printf(s, "%pI6", &sa6->sin6_addr.s6_addr);
383 if (sa6->sin6_scope_id)
384 seq_printf(s, "%%%u", sa6->sin6_scope_id);
387 seq_printf(s, "(unknown)");
392 * cifs_show_options() is for displaying mount options in /proc/mounts.
393 * Not all settable options are displayed but most of the important
397 cifs_show_options(struct seq_file *s, struct vfsmount *m)
399 struct cifs_sb_info *cifs_sb = CIFS_SB(m->mnt_sb);
400 struct cifsTconInfo *tcon = cifs_sb_master_tcon(cifs_sb);
401 struct sockaddr *srcaddr;
402 srcaddr = (struct sockaddr *)&tcon->ses->server->srcaddr;
404 seq_printf(s, ",unc=%s", tcon->treeName);
406 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER)
407 seq_printf(s, ",multiuser");
408 else if (tcon->ses->userName)
409 seq_printf(s, ",username=%s", tcon->ses->userName);
411 if (tcon->ses->domainName)
412 seq_printf(s, ",domain=%s", tcon->ses->domainName);
414 if (srcaddr->sa_family != AF_UNSPEC) {
415 struct sockaddr_in *saddr4;
416 struct sockaddr_in6 *saddr6;
417 saddr4 = (struct sockaddr_in *)srcaddr;
418 saddr6 = (struct sockaddr_in6 *)srcaddr;
419 if (srcaddr->sa_family == AF_INET6)
420 seq_printf(s, ",srcaddr=%pI6c",
422 else if (srcaddr->sa_family == AF_INET)
423 seq_printf(s, ",srcaddr=%pI4",
424 &saddr4->sin_addr.s_addr);
426 seq_printf(s, ",srcaddr=BAD-AF:%i",
427 (int)(srcaddr->sa_family));
430 seq_printf(s, ",uid=%d", cifs_sb->mnt_uid);
431 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)
432 seq_printf(s, ",forceuid");
434 seq_printf(s, ",noforceuid");
436 seq_printf(s, ",gid=%d", cifs_sb->mnt_gid);
437 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)
438 seq_printf(s, ",forcegid");
440 seq_printf(s, ",noforcegid");
442 cifs_show_address(s, tcon->ses->server);
445 seq_printf(s, ",file_mode=0%o,dir_mode=0%o",
446 cifs_sb->mnt_file_mode,
447 cifs_sb->mnt_dir_mode);
449 seq_printf(s, ",seal");
451 seq_printf(s, ",nocase");
453 seq_printf(s, ",hard");
454 if (cifs_sb->prepath)
455 seq_printf(s, ",prepath=%s", cifs_sb->prepath);
456 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
457 seq_printf(s, ",posixpaths");
458 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)
459 seq_printf(s, ",setuids");
460 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
461 seq_printf(s, ",serverino");
462 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO)
463 seq_printf(s, ",directio");
464 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
465 seq_printf(s, ",nouser_xattr");
466 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR)
467 seq_printf(s, ",mapchars");
468 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)
469 seq_printf(s, ",sfu");
470 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
471 seq_printf(s, ",nobrl");
472 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
473 seq_printf(s, ",cifsacl");
474 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)
475 seq_printf(s, ",dynperm");
476 if (m->mnt_sb->s_flags & MS_POSIXACL)
477 seq_printf(s, ",acl");
478 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS)
479 seq_printf(s, ",mfsymlinks");
480 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_FSCACHE)
481 seq_printf(s, ",fsc");
483 seq_printf(s, ",rsize=%d", cifs_sb->rsize);
484 seq_printf(s, ",wsize=%d", cifs_sb->wsize);
485 /* convert actimeo and display it in seconds */
486 seq_printf(s, ",actimeo=%lu", cifs_sb->actimeo / HZ);
491 static void cifs_umount_begin(struct super_block *sb)
493 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
494 struct cifsTconInfo *tcon;
499 tcon = cifs_sb_master_tcon(cifs_sb);
501 spin_lock(&cifs_tcp_ses_lock);
502 if ((tcon->tc_count > 1) || (tcon->tidStatus == CifsExiting)) {
503 /* we have other mounts to same share or we have
504 already tried to force umount this and woken up
505 all waiting network requests, nothing to do */
506 spin_unlock(&cifs_tcp_ses_lock);
508 } else if (tcon->tc_count == 1)
509 tcon->tidStatus = CifsExiting;
510 spin_unlock(&cifs_tcp_ses_lock);
512 /* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */
513 /* cancel_notify_requests(tcon); */
514 if (tcon->ses && tcon->ses->server) {
515 cFYI(1, "wake up tasks now - umount begin not complete");
516 wake_up_all(&tcon->ses->server->request_q);
517 wake_up_all(&tcon->ses->server->response_q);
518 msleep(1); /* yield */
519 /* we have to kick the requests once more */
520 wake_up_all(&tcon->ses->server->response_q);
527 #ifdef CONFIG_CIFS_STATS2
528 static int cifs_show_stats(struct seq_file *s, struct vfsmount *mnt)
535 static int cifs_remount(struct super_block *sb, int *flags, char *data)
537 *flags |= MS_NODIRATIME;
541 static int cifs_drop_inode(struct inode *inode)
543 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
545 /* no serverino => unconditional eviction */
546 return !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) ||
547 generic_drop_inode(inode);
550 static const struct super_operations cifs_super_ops = {
551 .put_super = cifs_put_super,
552 .statfs = cifs_statfs,
553 .alloc_inode = cifs_alloc_inode,
554 .destroy_inode = cifs_destroy_inode,
555 .drop_inode = cifs_drop_inode,
556 .evict_inode = cifs_evict_inode,
557 /* .delete_inode = cifs_delete_inode, */ /* Do not need above
558 function unless later we add lazy close of inodes or unless the
559 kernel forgets to call us with the same number of releases (closes)
561 .show_options = cifs_show_options,
562 .umount_begin = cifs_umount_begin,
563 .remount_fs = cifs_remount,
564 #ifdef CONFIG_CIFS_STATS2
565 .show_stats = cifs_show_stats,
569 static struct dentry *
570 cifs_do_mount(struct file_system_type *fs_type,
571 int flags, const char *dev_name, void *data)
574 struct super_block *sb;
576 sb = sget(fs_type, NULL, set_anon_super, NULL);
578 cFYI(1, "Devname: %s flags: %d ", dev_name, flags);
585 rc = cifs_read_super(sb, data, dev_name, flags & MS_SILENT ? 1 : 0);
587 deactivate_locked_super(sb);
590 sb->s_flags |= MS_ACTIVE;
591 return dget(sb->s_root);
594 static ssize_t cifs_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
595 unsigned long nr_segs, loff_t pos)
597 struct inode *inode = iocb->ki_filp->f_path.dentry->d_inode;
600 written = generic_file_aio_write(iocb, iov, nr_segs, pos);
601 if (!CIFS_I(inode)->clientCanCacheAll)
602 filemap_fdatawrite(inode->i_mapping);
606 static loff_t cifs_llseek(struct file *file, loff_t offset, int origin)
608 /* origin == SEEK_END => we must revalidate the cached file length */
609 if (origin == SEEK_END) {
612 /* some applications poll for the file length in this strange
613 way so we must seek to end on non-oplocked files by
614 setting the revalidate time to zero */
615 CIFS_I(file->f_path.dentry->d_inode)->time = 0;
617 retval = cifs_revalidate_file(file);
619 return (loff_t)retval;
621 return generic_file_llseek_unlocked(file, offset, origin);
624 static int cifs_setlease(struct file *file, long arg, struct file_lock **lease)
626 /* note that this is called by vfs setlease with lock_flocks held
627 to protect *lease from going away */
628 struct inode *inode = file->f_path.dentry->d_inode;
629 struct cifsFileInfo *cfile = file->private_data;
631 if (!(S_ISREG(inode->i_mode)))
634 /* check if file is oplocked */
635 if (((arg == F_RDLCK) &&
636 (CIFS_I(inode)->clientCanCacheRead)) ||
638 (CIFS_I(inode)->clientCanCacheAll)))
639 return generic_setlease(file, arg, lease);
640 else if (tlink_tcon(cfile->tlink)->local_lease &&
641 !CIFS_I(inode)->clientCanCacheRead)
642 /* If the server claims to support oplock on this
643 file, then we still need to check oplock even
644 if the local_lease mount option is set, but there
645 are servers which do not support oplock for which
646 this mount option may be useful if the user
647 knows that the file won't be changed on the server
649 return generic_setlease(file, arg, lease);
654 struct file_system_type cifs_fs_type = {
655 .owner = THIS_MODULE,
657 .mount = cifs_do_mount,
658 .kill_sb = kill_anon_super,
661 const struct inode_operations cifs_dir_inode_ops = {
662 .create = cifs_create,
663 .lookup = cifs_lookup,
664 .getattr = cifs_getattr,
665 .unlink = cifs_unlink,
666 .link = cifs_hardlink,
669 .rename = cifs_rename,
670 .permission = cifs_permission,
671 /* revalidate:cifs_revalidate, */
672 .setattr = cifs_setattr,
673 .symlink = cifs_symlink,
675 #ifdef CONFIG_CIFS_XATTR
676 .setxattr = cifs_setxattr,
677 .getxattr = cifs_getxattr,
678 .listxattr = cifs_listxattr,
679 .removexattr = cifs_removexattr,
683 const struct inode_operations cifs_file_inode_ops = {
684 /* revalidate:cifs_revalidate, */
685 .setattr = cifs_setattr,
686 .getattr = cifs_getattr, /* do we need this anymore? */
687 .rename = cifs_rename,
688 .permission = cifs_permission,
689 #ifdef CONFIG_CIFS_XATTR
690 .setxattr = cifs_setxattr,
691 .getxattr = cifs_getxattr,
692 .listxattr = cifs_listxattr,
693 .removexattr = cifs_removexattr,
697 const struct inode_operations cifs_symlink_inode_ops = {
698 .readlink = generic_readlink,
699 .follow_link = cifs_follow_link,
700 .put_link = cifs_put_link,
701 .permission = cifs_permission,
702 /* BB add the following two eventually */
703 /* revalidate: cifs_revalidate,
704 setattr: cifs_notify_change, *//* BB do we need notify change */
705 #ifdef CONFIG_CIFS_XATTR
706 .setxattr = cifs_setxattr,
707 .getxattr = cifs_getxattr,
708 .listxattr = cifs_listxattr,
709 .removexattr = cifs_removexattr,
713 const struct file_operations cifs_file_ops = {
714 .read = do_sync_read,
715 .write = do_sync_write,
716 .aio_read = generic_file_aio_read,
717 .aio_write = cifs_file_aio_write,
719 .release = cifs_close,
723 .mmap = cifs_file_mmap,
724 .splice_read = generic_file_splice_read,
725 .llseek = cifs_llseek,
726 #ifdef CONFIG_CIFS_POSIX
727 .unlocked_ioctl = cifs_ioctl,
728 #endif /* CONFIG_CIFS_POSIX */
729 .setlease = cifs_setlease,
732 const struct file_operations cifs_file_direct_ops = {
733 /* no aio, no readv -
734 BB reevaluate whether they can be done with directio, no cache */
735 .read = cifs_user_read,
736 .write = cifs_user_write,
738 .release = cifs_close,
742 .mmap = cifs_file_mmap,
743 .splice_read = generic_file_splice_read,
744 #ifdef CONFIG_CIFS_POSIX
745 .unlocked_ioctl = cifs_ioctl,
746 #endif /* CONFIG_CIFS_POSIX */
747 .llseek = cifs_llseek,
748 .setlease = cifs_setlease,
750 const struct file_operations cifs_file_nobrl_ops = {
751 .read = do_sync_read,
752 .write = do_sync_write,
753 .aio_read = generic_file_aio_read,
754 .aio_write = cifs_file_aio_write,
756 .release = cifs_close,
759 .mmap = cifs_file_mmap,
760 .splice_read = generic_file_splice_read,
761 .llseek = cifs_llseek,
762 #ifdef CONFIG_CIFS_POSIX
763 .unlocked_ioctl = cifs_ioctl,
764 #endif /* CONFIG_CIFS_POSIX */
765 .setlease = cifs_setlease,
768 const struct file_operations cifs_file_direct_nobrl_ops = {
769 /* no mmap, no aio, no readv -
770 BB reevaluate whether they can be done with directio, no cache */
771 .read = cifs_user_read,
772 .write = cifs_user_write,
774 .release = cifs_close,
777 .mmap = cifs_file_mmap,
778 .splice_read = generic_file_splice_read,
779 #ifdef CONFIG_CIFS_POSIX
780 .unlocked_ioctl = cifs_ioctl,
781 #endif /* CONFIG_CIFS_POSIX */
782 .llseek = cifs_llseek,
783 .setlease = cifs_setlease,
786 const struct file_operations cifs_dir_ops = {
787 .readdir = cifs_readdir,
788 .release = cifs_closedir,
789 .read = generic_read_dir,
790 .unlocked_ioctl = cifs_ioctl,
791 .llseek = generic_file_llseek,
795 cifs_init_once(void *inode)
797 struct cifsInodeInfo *cifsi = inode;
799 inode_init_once(&cifsi->vfs_inode);
800 INIT_LIST_HEAD(&cifsi->lockList);
804 cifs_init_inodecache(void)
806 cifs_inode_cachep = kmem_cache_create("cifs_inode_cache",
807 sizeof(struct cifsInodeInfo),
808 0, (SLAB_RECLAIM_ACCOUNT|
811 if (cifs_inode_cachep == NULL)
818 cifs_destroy_inodecache(void)
820 kmem_cache_destroy(cifs_inode_cachep);
824 cifs_init_request_bufs(void)
826 if (CIFSMaxBufSize < 8192) {
827 /* Buffer size can not be smaller than 2 * PATH_MAX since maximum
828 Unicode path name has to fit in any SMB/CIFS path based frames */
829 CIFSMaxBufSize = 8192;
830 } else if (CIFSMaxBufSize > 1024*127) {
831 CIFSMaxBufSize = 1024 * 127;
833 CIFSMaxBufSize &= 0x1FE00; /* Round size to even 512 byte mult*/
835 /* cERROR(1, "CIFSMaxBufSize %d 0x%x",CIFSMaxBufSize,CIFSMaxBufSize); */
836 cifs_req_cachep = kmem_cache_create("cifs_request",
838 MAX_CIFS_HDR_SIZE, 0,
839 SLAB_HWCACHE_ALIGN, NULL);
840 if (cifs_req_cachep == NULL)
843 if (cifs_min_rcv < 1)
845 else if (cifs_min_rcv > 64) {
847 cERROR(1, "cifs_min_rcv set to maximum (64)");
850 cifs_req_poolp = mempool_create_slab_pool(cifs_min_rcv,
853 if (cifs_req_poolp == NULL) {
854 kmem_cache_destroy(cifs_req_cachep);
857 /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and
858 almost all handle based requests (but not write response, nor is it
859 sufficient for path based requests). A smaller size would have
860 been more efficient (compacting multiple slab items on one 4k page)
861 for the case in which debug was on, but this larger size allows
862 more SMBs to use small buffer alloc and is still much more
863 efficient to alloc 1 per page off the slab compared to 17K (5page)
864 alloc of large cifs buffers even when page debugging is on */
865 cifs_sm_req_cachep = kmem_cache_create("cifs_small_rq",
866 MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN,
868 if (cifs_sm_req_cachep == NULL) {
869 mempool_destroy(cifs_req_poolp);
870 kmem_cache_destroy(cifs_req_cachep);
874 if (cifs_min_small < 2)
876 else if (cifs_min_small > 256) {
877 cifs_min_small = 256;
878 cFYI(1, "cifs_min_small set to maximum (256)");
881 cifs_sm_req_poolp = mempool_create_slab_pool(cifs_min_small,
884 if (cifs_sm_req_poolp == NULL) {
885 mempool_destroy(cifs_req_poolp);
886 kmem_cache_destroy(cifs_req_cachep);
887 kmem_cache_destroy(cifs_sm_req_cachep);
895 cifs_destroy_request_bufs(void)
897 mempool_destroy(cifs_req_poolp);
898 kmem_cache_destroy(cifs_req_cachep);
899 mempool_destroy(cifs_sm_req_poolp);
900 kmem_cache_destroy(cifs_sm_req_cachep);
906 cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids",
907 sizeof(struct mid_q_entry), 0,
908 SLAB_HWCACHE_ALIGN, NULL);
909 if (cifs_mid_cachep == NULL)
912 /* 3 is a reasonable minimum number of simultaneous operations */
913 cifs_mid_poolp = mempool_create_slab_pool(3, cifs_mid_cachep);
914 if (cifs_mid_poolp == NULL) {
915 kmem_cache_destroy(cifs_mid_cachep);
923 cifs_destroy_mids(void)
925 mempool_destroy(cifs_mid_poolp);
926 kmem_cache_destroy(cifs_mid_cachep);
934 INIT_LIST_HEAD(&cifs_tcp_ses_list);
935 #ifdef CONFIG_CIFS_EXPERIMENTAL
936 INIT_LIST_HEAD(&GlobalDnotifyReqList);
937 INIT_LIST_HEAD(&GlobalDnotifyRsp_Q);
940 * Initialize Global counters
942 atomic_set(&sesInfoAllocCount, 0);
943 atomic_set(&tconInfoAllocCount, 0);
944 atomic_set(&tcpSesAllocCount, 0);
945 atomic_set(&tcpSesReconnectCount, 0);
946 atomic_set(&tconInfoReconnectCount, 0);
948 atomic_set(&bufAllocCount, 0);
949 atomic_set(&smBufAllocCount, 0);
950 #ifdef CONFIG_CIFS_STATS2
951 atomic_set(&totBufAllocCount, 0);
952 atomic_set(&totSmBufAllocCount, 0);
953 #endif /* CONFIG_CIFS_STATS2 */
955 atomic_set(&midCount, 0);
956 GlobalCurrentXid = 0;
957 GlobalTotalActiveXid = 0;
958 GlobalMaxActiveXid = 0;
959 spin_lock_init(&cifs_tcp_ses_lock);
960 spin_lock_init(&cifs_file_list_lock);
961 spin_lock_init(&GlobalMid_Lock);
963 if (cifs_max_pending < 2) {
964 cifs_max_pending = 2;
965 cFYI(1, "cifs_max_pending set to min of 2");
966 } else if (cifs_max_pending > 256) {
967 cifs_max_pending = 256;
968 cFYI(1, "cifs_max_pending set to max of 256");
971 rc = cifs_fscache_register();
975 rc = cifs_init_inodecache();
977 goto out_unreg_fscache;
979 rc = cifs_init_mids();
981 goto out_destroy_inodecache;
983 rc = cifs_init_request_bufs();
985 goto out_destroy_mids;
987 rc = register_filesystem(&cifs_fs_type);
989 goto out_destroy_request_bufs;
990 #ifdef CONFIG_CIFS_UPCALL
991 rc = register_key_type(&cifs_spnego_key_type);
993 goto out_unregister_filesystem;
998 #ifdef CONFIG_CIFS_UPCALL
999 out_unregister_filesystem:
1000 unregister_filesystem(&cifs_fs_type);
1002 out_destroy_request_bufs:
1003 cifs_destroy_request_bufs();
1005 cifs_destroy_mids();
1006 out_destroy_inodecache:
1007 cifs_destroy_inodecache();
1009 cifs_fscache_unregister();
1018 cFYI(DBG2, "exit_cifs");
1020 cifs_fscache_unregister();
1021 #ifdef CONFIG_CIFS_DFS_UPCALL
1022 cifs_dfs_release_automount_timer();
1024 #ifdef CONFIG_CIFS_UPCALL
1025 unregister_key_type(&cifs_spnego_key_type);
1027 unregister_filesystem(&cifs_fs_type);
1028 cifs_destroy_inodecache();
1029 cifs_destroy_mids();
1030 cifs_destroy_request_bufs();
1033 MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>");
1034 MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */
1036 ("VFS to access servers complying with the SNIA CIFS Specification "
1037 "e.g. Samba and Windows");
1038 MODULE_VERSION(CIFS_VERSION);
1039 module_init(init_cifs)
1040 module_exit(exit_cifs)