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_sb_active(struct super_block *sb)
89 struct cifs_sb_info *server = CIFS_SB(sb);
91 if (atomic_inc_return(&server->active) == 1)
92 atomic_inc(&sb->s_active);
96 cifs_sb_deactive(struct super_block *sb)
98 struct cifs_sb_info *server = CIFS_SB(sb);
100 if (atomic_dec_and_test(&server->active))
101 deactivate_super(sb);
105 cifs_read_super(struct super_block *sb, void *data,
106 const char *devname, int silent)
109 struct cifs_sb_info *cifs_sb;
112 /* BB should we make this contingent on mount parm? */
113 sb->s_flags |= MS_NODIRATIME | MS_NOATIME;
114 sb->s_fs_info = kzalloc(sizeof(struct cifs_sb_info), GFP_KERNEL);
115 cifs_sb = CIFS_SB(sb);
119 spin_lock_init(&cifs_sb->tlink_tree_lock);
120 INIT_RADIX_TREE(&cifs_sb->tlink_tree, GFP_KERNEL);
122 rc = bdi_setup_and_register(&cifs_sb->bdi, "cifs", BDI_CAP_MAP_COPY);
128 #ifdef CONFIG_CIFS_DFS_UPCALL
129 /* copy mount params to sb for use in submounts */
130 /* BB: should we move this after the mount so we
131 * do not have to do the copy on failed mounts?
132 * BB: May be it is better to do simple copy before
133 * complex operation (mount), and in case of fail
134 * just exit instead of doing mount and attempting
135 * undo it if this copy fails?*/
137 int len = strlen(data);
138 cifs_sb->mountdata = kzalloc(len + 1, GFP_KERNEL);
139 if (cifs_sb->mountdata == NULL) {
140 bdi_destroy(&cifs_sb->bdi);
141 kfree(sb->s_fs_info);
142 sb->s_fs_info = NULL;
145 strncpy(cifs_sb->mountdata, data, len + 1);
146 cifs_sb->mountdata[len] = '\0';
150 rc = cifs_mount(sb, cifs_sb, data, devname);
154 cERROR(1, "cifs_mount failed w/return code = %d", rc);
155 goto out_mount_failed;
158 sb->s_magic = CIFS_MAGIC_NUMBER;
159 sb->s_op = &cifs_super_ops;
160 sb->s_bdi = &cifs_sb->bdi;
161 sb->s_blocksize = CIFS_MAX_MSGSIZE;
162 sb->s_blocksize_bits = 14; /* default 2**14 = CIFS_MAX_MSGSIZE */
163 inode = cifs_root_iget(sb, ROOT_I);
171 sb->s_root = d_alloc_root(inode);
178 #ifdef CONFIG_CIFS_EXPERIMENTAL
179 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
180 cFYI(1, "export ops supported");
181 sb->s_export_op = &cifs_export_ops;
183 #endif /* EXPERIMENTAL */
188 cERROR(1, "cifs_read_super: get root inode failed");
192 cifs_umount(sb, cifs_sb);
196 #ifdef CONFIG_CIFS_DFS_UPCALL
197 if (cifs_sb->mountdata) {
198 kfree(cifs_sb->mountdata);
199 cifs_sb->mountdata = NULL;
202 unload_nls(cifs_sb->local_nls);
203 bdi_destroy(&cifs_sb->bdi);
210 cifs_put_super(struct super_block *sb)
213 struct cifs_sb_info *cifs_sb;
215 cFYI(1, "In cifs_put_super");
216 cifs_sb = CIFS_SB(sb);
217 if (cifs_sb == NULL) {
218 cFYI(1, "Empty cifs superblock info passed to unmount");
224 rc = cifs_umount(sb, cifs_sb);
226 cERROR(1, "cifs_umount failed with return code %d", rc);
227 #ifdef CONFIG_CIFS_DFS_UPCALL
228 if (cifs_sb->mountdata) {
229 kfree(cifs_sb->mountdata);
230 cifs_sb->mountdata = NULL;
234 unload_nls(cifs_sb->local_nls);
235 bdi_destroy(&cifs_sb->bdi);
242 cifs_statfs(struct dentry *dentry, struct kstatfs *buf)
244 struct super_block *sb = dentry->d_sb;
245 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
246 struct cifsTconInfo *tcon = cifs_sb_master_tcon(cifs_sb);
247 int rc = -EOPNOTSUPP;
252 buf->f_type = CIFS_MAGIC_NUMBER;
255 * PATH_MAX may be too long - it would presumably be total path,
256 * but note that some servers (includinng Samba 3) have a shorter
259 * Instead could get the real value via SMB_QUERY_FS_ATTRIBUTE_INFO.
261 buf->f_namelen = PATH_MAX;
262 buf->f_files = 0; /* undefined */
263 buf->f_ffree = 0; /* unlimited */
266 * We could add a second check for a QFS Unix capability bit
268 if ((tcon->ses->capabilities & CAP_UNIX) &&
269 (CIFS_POSIX_EXTENSIONS & le64_to_cpu(tcon->fsUnixInfo.Capability)))
270 rc = CIFSSMBQFSPosixInfo(xid, tcon, buf);
273 * Only need to call the old QFSInfo if failed on newer one,
276 if (rc && (tcon->ses->capabilities & CAP_NT_SMBS))
277 rc = CIFSSMBQFSInfo(xid, tcon, buf);
280 * Some old Windows servers also do not support level 103, retry with
281 * older level one if old server failed the previous call or we
282 * bypassed it because we detected that this was an older LANMAN sess
285 rc = SMBOldQFSInfo(xid, tcon, buf);
291 static int cifs_permission(struct inode *inode, int mask)
293 struct cifs_sb_info *cifs_sb;
295 cifs_sb = CIFS_SB(inode->i_sb);
297 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) {
298 if ((mask & MAY_EXEC) && !execute_ok(inode))
302 } else /* file mode might have been restricted at mount time
303 on the client (above and beyond ACL on servers) for
304 servers which do not support setting and viewing mode bits,
305 so allowing client to check permissions is useful */
306 return generic_permission(inode, mask, NULL);
309 static struct kmem_cache *cifs_inode_cachep;
310 static struct kmem_cache *cifs_req_cachep;
311 static struct kmem_cache *cifs_mid_cachep;
312 static struct kmem_cache *cifs_sm_req_cachep;
313 mempool_t *cifs_sm_req_poolp;
314 mempool_t *cifs_req_poolp;
315 mempool_t *cifs_mid_poolp;
317 static struct inode *
318 cifs_alloc_inode(struct super_block *sb)
320 struct cifsInodeInfo *cifs_inode;
321 cifs_inode = kmem_cache_alloc(cifs_inode_cachep, GFP_KERNEL);
324 cifs_inode->cifsAttrs = 0x20; /* default */
325 cifs_inode->time = 0;
326 cifs_inode->write_behind_rc = 0;
327 /* Until the file is open and we have gotten oplock
328 info back from the server, can not assume caching of
329 file data or metadata */
330 cifs_inode->clientCanCacheRead = false;
331 cifs_inode->clientCanCacheAll = false;
332 cifs_inode->delete_pending = false;
333 cifs_inode->invalid_mapping = false;
334 cifs_inode->vfs_inode.i_blkbits = 14; /* 2**14 = CIFS_MAX_MSGSIZE */
335 cifs_inode->server_eof = 0;
337 /* Can not set i_flags here - they get immediately overwritten
338 to zero by the VFS */
339 /* cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME;*/
340 INIT_LIST_HEAD(&cifs_inode->openFileList);
341 return &cifs_inode->vfs_inode;
345 cifs_destroy_inode(struct inode *inode)
347 kmem_cache_free(cifs_inode_cachep, CIFS_I(inode));
351 cifs_evict_inode(struct inode *inode)
353 truncate_inode_pages(&inode->i_data, 0);
354 end_writeback(inode);
355 cifs_fscache_release_inode_cookie(inode);
359 cifs_show_address(struct seq_file *s, struct TCP_Server_Info *server)
361 seq_printf(s, ",addr=");
363 switch (server->addr.sockAddr.sin_family) {
365 seq_printf(s, "%pI4", &server->addr.sockAddr.sin_addr.s_addr);
368 seq_printf(s, "%pI6",
369 &server->addr.sockAddr6.sin6_addr.s6_addr);
370 if (server->addr.sockAddr6.sin6_scope_id)
371 seq_printf(s, "%%%u",
372 server->addr.sockAddr6.sin6_scope_id);
375 seq_printf(s, "(unknown)");
380 * cifs_show_options() is for displaying mount options in /proc/mounts.
381 * Not all settable options are displayed but most of the important
385 cifs_show_options(struct seq_file *s, struct vfsmount *m)
387 struct cifs_sb_info *cifs_sb = CIFS_SB(m->mnt_sb);
388 struct cifsTconInfo *tcon = cifs_sb_master_tcon(cifs_sb);
389 struct sockaddr *srcaddr;
390 srcaddr = (struct sockaddr *)&tcon->ses->server->srcaddr;
392 seq_printf(s, ",unc=%s", tcon->treeName);
394 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER)
395 seq_printf(s, ",multiuser");
396 else if (tcon->ses->userName)
397 seq_printf(s, ",username=%s", tcon->ses->userName);
399 if (tcon->ses->domainName)
400 seq_printf(s, ",domain=%s", tcon->ses->domainName);
402 if (srcaddr->sa_family != AF_UNSPEC) {
403 struct sockaddr_in *saddr4;
404 struct sockaddr_in6 *saddr6;
405 saddr4 = (struct sockaddr_in *)srcaddr;
406 saddr6 = (struct sockaddr_in6 *)srcaddr;
407 if (srcaddr->sa_family == AF_INET6)
408 seq_printf(s, ",srcaddr=%pI6c",
410 else if (srcaddr->sa_family == AF_INET)
411 seq_printf(s, ",srcaddr=%pI4",
412 &saddr4->sin_addr.s_addr);
414 seq_printf(s, ",srcaddr=BAD-AF:%i",
415 (int)(srcaddr->sa_family));
418 seq_printf(s, ",uid=%d", cifs_sb->mnt_uid);
419 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)
420 seq_printf(s, ",forceuid");
422 seq_printf(s, ",noforceuid");
424 seq_printf(s, ",gid=%d", cifs_sb->mnt_gid);
425 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)
426 seq_printf(s, ",forcegid");
428 seq_printf(s, ",noforcegid");
430 cifs_show_address(s, tcon->ses->server);
433 seq_printf(s, ",file_mode=0%o,dir_mode=0%o",
434 cifs_sb->mnt_file_mode,
435 cifs_sb->mnt_dir_mode);
437 seq_printf(s, ",seal");
439 seq_printf(s, ",nocase");
441 seq_printf(s, ",hard");
442 if (cifs_sb->prepath)
443 seq_printf(s, ",prepath=%s", cifs_sb->prepath);
444 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
445 seq_printf(s, ",posixpaths");
446 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)
447 seq_printf(s, ",setuids");
448 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
449 seq_printf(s, ",serverino");
450 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO)
451 seq_printf(s, ",directio");
452 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
453 seq_printf(s, ",nouser_xattr");
454 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR)
455 seq_printf(s, ",mapchars");
456 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)
457 seq_printf(s, ",sfu");
458 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
459 seq_printf(s, ",nobrl");
460 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
461 seq_printf(s, ",cifsacl");
462 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)
463 seq_printf(s, ",dynperm");
464 if (m->mnt_sb->s_flags & MS_POSIXACL)
465 seq_printf(s, ",acl");
466 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS)
467 seq_printf(s, ",mfsymlinks");
469 seq_printf(s, ",rsize=%d", cifs_sb->rsize);
470 seq_printf(s, ",wsize=%d", cifs_sb->wsize);
475 static void cifs_umount_begin(struct super_block *sb)
477 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
478 struct cifsTconInfo *tcon;
483 tcon = cifs_sb_master_tcon(cifs_sb);
485 spin_lock(&cifs_tcp_ses_lock);
486 if ((tcon->tc_count > 1) || (tcon->tidStatus == CifsExiting)) {
487 /* we have other mounts to same share or we have
488 already tried to force umount this and woken up
489 all waiting network requests, nothing to do */
490 spin_unlock(&cifs_tcp_ses_lock);
492 } else if (tcon->tc_count == 1)
493 tcon->tidStatus = CifsExiting;
494 spin_unlock(&cifs_tcp_ses_lock);
496 /* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */
497 /* cancel_notify_requests(tcon); */
498 if (tcon->ses && tcon->ses->server) {
499 cFYI(1, "wake up tasks now - umount begin not complete");
500 wake_up_all(&tcon->ses->server->request_q);
501 wake_up_all(&tcon->ses->server->response_q);
502 msleep(1); /* yield */
503 /* we have to kick the requests once more */
504 wake_up_all(&tcon->ses->server->response_q);
511 #ifdef CONFIG_CIFS_STATS2
512 static int cifs_show_stats(struct seq_file *s, struct vfsmount *mnt)
519 static int cifs_remount(struct super_block *sb, int *flags, char *data)
521 *flags |= MS_NODIRATIME;
525 static int cifs_drop_inode(struct inode *inode)
527 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
529 /* no serverino => unconditional eviction */
530 return !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) ||
531 generic_drop_inode(inode);
534 static const struct super_operations cifs_super_ops = {
535 .put_super = cifs_put_super,
536 .statfs = cifs_statfs,
537 .alloc_inode = cifs_alloc_inode,
538 .destroy_inode = cifs_destroy_inode,
539 .drop_inode = cifs_drop_inode,
540 .evict_inode = cifs_evict_inode,
541 /* .delete_inode = cifs_delete_inode, */ /* Do not need above
542 function unless later we add lazy close of inodes or unless the
543 kernel forgets to call us with the same number of releases (closes)
545 .show_options = cifs_show_options,
546 .umount_begin = cifs_umount_begin,
547 .remount_fs = cifs_remount,
548 #ifdef CONFIG_CIFS_STATS2
549 .show_stats = cifs_show_stats,
554 cifs_get_sb(struct file_system_type *fs_type,
555 int flags, const char *dev_name, void *data, struct vfsmount *mnt)
558 struct super_block *sb = sget(fs_type, NULL, set_anon_super, NULL);
560 cFYI(1, "Devname: %s flags: %d ", dev_name, flags);
567 rc = cifs_read_super(sb, data, dev_name, flags & MS_SILENT ? 1 : 0);
569 deactivate_locked_super(sb);
572 sb->s_flags |= MS_ACTIVE;
573 simple_set_mnt(mnt, sb);
577 static ssize_t cifs_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
578 unsigned long nr_segs, loff_t pos)
580 struct inode *inode = iocb->ki_filp->f_path.dentry->d_inode;
583 written = generic_file_aio_write(iocb, iov, nr_segs, pos);
584 if (!CIFS_I(inode)->clientCanCacheAll)
585 filemap_fdatawrite(inode->i_mapping);
589 static loff_t cifs_llseek(struct file *file, loff_t offset, int origin)
591 /* origin == SEEK_END => we must revalidate the cached file length */
592 if (origin == SEEK_END) {
595 /* some applications poll for the file length in this strange
596 way so we must seek to end on non-oplocked files by
597 setting the revalidate time to zero */
598 CIFS_I(file->f_path.dentry->d_inode)->time = 0;
600 retval = cifs_revalidate_file(file);
602 return (loff_t)retval;
604 return generic_file_llseek_unlocked(file, offset, origin);
607 static int cifs_setlease(struct file *file, long arg, struct file_lock **lease)
609 /* note that this is called by vfs setlease with the BKL held
610 although I doubt that BKL is needed here in cifs */
611 struct inode *inode = file->f_path.dentry->d_inode;
612 struct cifsFileInfo *cfile = file->private_data;
614 if (!(S_ISREG(inode->i_mode)))
617 /* check if file is oplocked */
618 if (((arg == F_RDLCK) &&
619 (CIFS_I(inode)->clientCanCacheRead)) ||
621 (CIFS_I(inode)->clientCanCacheAll)))
622 return generic_setlease(file, arg, lease);
623 else if (tlink_tcon(cfile->tlink)->local_lease &&
624 !CIFS_I(inode)->clientCanCacheRead)
625 /* If the server claims to support oplock on this
626 file, then we still need to check oplock even
627 if the local_lease mount option is set, but there
628 are servers which do not support oplock for which
629 this mount option may be useful if the user
630 knows that the file won't be changed on the server
632 return generic_setlease(file, arg, lease);
637 struct file_system_type cifs_fs_type = {
638 .owner = THIS_MODULE,
640 .get_sb = cifs_get_sb,
641 .kill_sb = kill_anon_super,
644 const struct inode_operations cifs_dir_inode_ops = {
645 .create = cifs_create,
646 .lookup = cifs_lookup,
647 .getattr = cifs_getattr,
648 .unlink = cifs_unlink,
649 .link = cifs_hardlink,
652 .rename = cifs_rename,
653 .permission = cifs_permission,
654 /* revalidate:cifs_revalidate, */
655 .setattr = cifs_setattr,
656 .symlink = cifs_symlink,
658 #ifdef CONFIG_CIFS_XATTR
659 .setxattr = cifs_setxattr,
660 .getxattr = cifs_getxattr,
661 .listxattr = cifs_listxattr,
662 .removexattr = cifs_removexattr,
666 const struct inode_operations cifs_file_inode_ops = {
667 /* revalidate:cifs_revalidate, */
668 .setattr = cifs_setattr,
669 .getattr = cifs_getattr, /* do we need this anymore? */
670 .rename = cifs_rename,
671 .permission = cifs_permission,
672 #ifdef CONFIG_CIFS_XATTR
673 .setxattr = cifs_setxattr,
674 .getxattr = cifs_getxattr,
675 .listxattr = cifs_listxattr,
676 .removexattr = cifs_removexattr,
680 const struct inode_operations cifs_symlink_inode_ops = {
681 .readlink = generic_readlink,
682 .follow_link = cifs_follow_link,
683 .put_link = cifs_put_link,
684 .permission = cifs_permission,
685 /* BB add the following two eventually */
686 /* revalidate: cifs_revalidate,
687 setattr: cifs_notify_change, *//* BB do we need notify change */
688 #ifdef CONFIG_CIFS_XATTR
689 .setxattr = cifs_setxattr,
690 .getxattr = cifs_getxattr,
691 .listxattr = cifs_listxattr,
692 .removexattr = cifs_removexattr,
696 const struct file_operations cifs_file_ops = {
697 .read = do_sync_read,
698 .write = do_sync_write,
699 .aio_read = generic_file_aio_read,
700 .aio_write = cifs_file_aio_write,
702 .release = cifs_close,
706 .mmap = cifs_file_mmap,
707 .splice_read = generic_file_splice_read,
708 .llseek = cifs_llseek,
709 #ifdef CONFIG_CIFS_POSIX
710 .unlocked_ioctl = cifs_ioctl,
711 #endif /* CONFIG_CIFS_POSIX */
712 .setlease = cifs_setlease,
715 const struct file_operations cifs_file_direct_ops = {
716 /* no aio, no readv -
717 BB reevaluate whether they can be done with directio, no cache */
718 .read = cifs_user_read,
719 .write = cifs_user_write,
721 .release = cifs_close,
725 .mmap = cifs_file_mmap,
726 .splice_read = generic_file_splice_read,
727 #ifdef CONFIG_CIFS_POSIX
728 .unlocked_ioctl = cifs_ioctl,
729 #endif /* CONFIG_CIFS_POSIX */
730 .llseek = cifs_llseek,
731 .setlease = cifs_setlease,
733 const struct file_operations cifs_file_nobrl_ops = {
734 .read = do_sync_read,
735 .write = do_sync_write,
736 .aio_read = generic_file_aio_read,
737 .aio_write = cifs_file_aio_write,
739 .release = cifs_close,
742 .mmap = cifs_file_mmap,
743 .splice_read = generic_file_splice_read,
744 .llseek = cifs_llseek,
745 #ifdef CONFIG_CIFS_POSIX
746 .unlocked_ioctl = cifs_ioctl,
747 #endif /* CONFIG_CIFS_POSIX */
748 .setlease = cifs_setlease,
751 const struct file_operations cifs_file_direct_nobrl_ops = {
752 /* no mmap, no aio, no readv -
753 BB reevaluate whether they can be done with directio, no cache */
754 .read = cifs_user_read,
755 .write = cifs_user_write,
757 .release = cifs_close,
760 .mmap = cifs_file_mmap,
761 .splice_read = generic_file_splice_read,
762 #ifdef CONFIG_CIFS_POSIX
763 .unlocked_ioctl = cifs_ioctl,
764 #endif /* CONFIG_CIFS_POSIX */
765 .llseek = cifs_llseek,
766 .setlease = cifs_setlease,
769 const struct file_operations cifs_dir_ops = {
770 .readdir = cifs_readdir,
771 .release = cifs_closedir,
772 .read = generic_read_dir,
773 .unlocked_ioctl = cifs_ioctl,
774 .llseek = generic_file_llseek,
778 cifs_init_once(void *inode)
780 struct cifsInodeInfo *cifsi = inode;
782 inode_init_once(&cifsi->vfs_inode);
783 INIT_LIST_HEAD(&cifsi->lockList);
787 cifs_init_inodecache(void)
789 cifs_inode_cachep = kmem_cache_create("cifs_inode_cache",
790 sizeof(struct cifsInodeInfo),
791 0, (SLAB_RECLAIM_ACCOUNT|
794 if (cifs_inode_cachep == NULL)
801 cifs_destroy_inodecache(void)
803 kmem_cache_destroy(cifs_inode_cachep);
807 cifs_init_request_bufs(void)
809 if (CIFSMaxBufSize < 8192) {
810 /* Buffer size can not be smaller than 2 * PATH_MAX since maximum
811 Unicode path name has to fit in any SMB/CIFS path based frames */
812 CIFSMaxBufSize = 8192;
813 } else if (CIFSMaxBufSize > 1024*127) {
814 CIFSMaxBufSize = 1024 * 127;
816 CIFSMaxBufSize &= 0x1FE00; /* Round size to even 512 byte mult*/
818 /* cERROR(1, "CIFSMaxBufSize %d 0x%x",CIFSMaxBufSize,CIFSMaxBufSize); */
819 cifs_req_cachep = kmem_cache_create("cifs_request",
821 MAX_CIFS_HDR_SIZE, 0,
822 SLAB_HWCACHE_ALIGN, NULL);
823 if (cifs_req_cachep == NULL)
826 if (cifs_min_rcv < 1)
828 else if (cifs_min_rcv > 64) {
830 cERROR(1, "cifs_min_rcv set to maximum (64)");
833 cifs_req_poolp = mempool_create_slab_pool(cifs_min_rcv,
836 if (cifs_req_poolp == NULL) {
837 kmem_cache_destroy(cifs_req_cachep);
840 /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and
841 almost all handle based requests (but not write response, nor is it
842 sufficient for path based requests). A smaller size would have
843 been more efficient (compacting multiple slab items on one 4k page)
844 for the case in which debug was on, but this larger size allows
845 more SMBs to use small buffer alloc and is still much more
846 efficient to alloc 1 per page off the slab compared to 17K (5page)
847 alloc of large cifs buffers even when page debugging is on */
848 cifs_sm_req_cachep = kmem_cache_create("cifs_small_rq",
849 MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN,
851 if (cifs_sm_req_cachep == NULL) {
852 mempool_destroy(cifs_req_poolp);
853 kmem_cache_destroy(cifs_req_cachep);
857 if (cifs_min_small < 2)
859 else if (cifs_min_small > 256) {
860 cifs_min_small = 256;
861 cFYI(1, "cifs_min_small set to maximum (256)");
864 cifs_sm_req_poolp = mempool_create_slab_pool(cifs_min_small,
867 if (cifs_sm_req_poolp == NULL) {
868 mempool_destroy(cifs_req_poolp);
869 kmem_cache_destroy(cifs_req_cachep);
870 kmem_cache_destroy(cifs_sm_req_cachep);
878 cifs_destroy_request_bufs(void)
880 mempool_destroy(cifs_req_poolp);
881 kmem_cache_destroy(cifs_req_cachep);
882 mempool_destroy(cifs_sm_req_poolp);
883 kmem_cache_destroy(cifs_sm_req_cachep);
889 cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids",
890 sizeof(struct mid_q_entry), 0,
891 SLAB_HWCACHE_ALIGN, NULL);
892 if (cifs_mid_cachep == NULL)
895 /* 3 is a reasonable minimum number of simultaneous operations */
896 cifs_mid_poolp = mempool_create_slab_pool(3, cifs_mid_cachep);
897 if (cifs_mid_poolp == NULL) {
898 kmem_cache_destroy(cifs_mid_cachep);
906 cifs_destroy_mids(void)
908 mempool_destroy(cifs_mid_poolp);
909 kmem_cache_destroy(cifs_mid_cachep);
917 INIT_LIST_HEAD(&cifs_tcp_ses_list);
918 #ifdef CONFIG_CIFS_EXPERIMENTAL
919 INIT_LIST_HEAD(&GlobalDnotifyReqList);
920 INIT_LIST_HEAD(&GlobalDnotifyRsp_Q);
923 * Initialize Global counters
925 atomic_set(&sesInfoAllocCount, 0);
926 atomic_set(&tconInfoAllocCount, 0);
927 atomic_set(&tcpSesAllocCount, 0);
928 atomic_set(&tcpSesReconnectCount, 0);
929 atomic_set(&tconInfoReconnectCount, 0);
931 atomic_set(&bufAllocCount, 0);
932 atomic_set(&smBufAllocCount, 0);
933 #ifdef CONFIG_CIFS_STATS2
934 atomic_set(&totBufAllocCount, 0);
935 atomic_set(&totSmBufAllocCount, 0);
936 #endif /* CONFIG_CIFS_STATS2 */
938 atomic_set(&midCount, 0);
939 GlobalCurrentXid = 0;
940 GlobalTotalActiveXid = 0;
941 GlobalMaxActiveXid = 0;
942 memset(Local_System_Name, 0, 15);
943 spin_lock_init(&cifs_tcp_ses_lock);
944 spin_lock_init(&cifs_file_list_lock);
945 spin_lock_init(&GlobalMid_Lock);
947 if (cifs_max_pending < 2) {
948 cifs_max_pending = 2;
949 cFYI(1, "cifs_max_pending set to min of 2");
950 } else if (cifs_max_pending > 256) {
951 cifs_max_pending = 256;
952 cFYI(1, "cifs_max_pending set to max of 256");
955 rc = cifs_fscache_register();
959 rc = cifs_init_inodecache();
961 goto out_unreg_fscache;
963 rc = cifs_init_mids();
965 goto out_destroy_inodecache;
967 rc = cifs_init_request_bufs();
969 goto out_destroy_mids;
971 rc = register_filesystem(&cifs_fs_type);
973 goto out_destroy_request_bufs;
974 #ifdef CONFIG_CIFS_UPCALL
975 rc = register_key_type(&cifs_spnego_key_type);
977 goto out_unregister_filesystem;
982 #ifdef CONFIG_CIFS_UPCALL
983 out_unregister_filesystem:
984 unregister_filesystem(&cifs_fs_type);
986 out_destroy_request_bufs:
987 cifs_destroy_request_bufs();
990 out_destroy_inodecache:
991 cifs_destroy_inodecache();
993 cifs_fscache_unregister();
1002 cFYI(DBG2, "exit_cifs");
1004 cifs_fscache_unregister();
1005 #ifdef CONFIG_CIFS_DFS_UPCALL
1006 cifs_dfs_release_automount_timer();
1008 #ifdef CONFIG_CIFS_UPCALL
1009 unregister_key_type(&cifs_spnego_key_type);
1011 unregister_filesystem(&cifs_fs_type);
1012 cifs_destroy_inodecache();
1013 cifs_destroy_mids();
1014 cifs_destroy_request_bufs();
1017 MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>");
1018 MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */
1020 ("VFS to access servers complying with the SNIA CIFS Specification "
1021 "e.g. Samba and Windows");
1022 MODULE_VERSION(CIFS_VERSION);
1023 module_init(init_cifs)
1024 module_exit(exit_cifs)