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 #ifdef CONFIG_CIFS_EXPERIMENTAL
178 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
179 cFYI(1, "export ops supported");
180 sb->s_export_op = &cifs_export_ops;
182 #endif /* EXPERIMENTAL */
187 cERROR(1, "cifs_read_super: get root inode failed");
191 cifs_umount(sb, cifs_sb);
195 #ifdef CONFIG_CIFS_DFS_UPCALL
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);
209 cifs_put_super(struct super_block *sb)
212 struct cifs_sb_info *cifs_sb;
214 cFYI(1, "In cifs_put_super");
215 cifs_sb = CIFS_SB(sb);
216 if (cifs_sb == NULL) {
217 cFYI(1, "Empty cifs superblock info passed to unmount");
221 rc = cifs_umount(sb, cifs_sb);
223 cERROR(1, "cifs_umount failed with return code %d", rc);
224 #ifdef CONFIG_CIFS_DFS_UPCALL
225 if (cifs_sb->mountdata) {
226 kfree(cifs_sb->mountdata);
227 cifs_sb->mountdata = NULL;
231 unload_nls(cifs_sb->local_nls);
232 bdi_destroy(&cifs_sb->bdi);
237 cifs_statfs(struct dentry *dentry, struct kstatfs *buf)
239 struct super_block *sb = dentry->d_sb;
240 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
241 struct cifsTconInfo *tcon = cifs_sb_master_tcon(cifs_sb);
242 int rc = -EOPNOTSUPP;
247 buf->f_type = CIFS_MAGIC_NUMBER;
250 * PATH_MAX may be too long - it would presumably be total path,
251 * but note that some servers (includinng Samba 3) have a shorter
254 * Instead could get the real value via SMB_QUERY_FS_ATTRIBUTE_INFO.
256 buf->f_namelen = PATH_MAX;
257 buf->f_files = 0; /* undefined */
258 buf->f_ffree = 0; /* unlimited */
261 * We could add a second check for a QFS Unix capability bit
263 if ((tcon->ses->capabilities & CAP_UNIX) &&
264 (CIFS_POSIX_EXTENSIONS & le64_to_cpu(tcon->fsUnixInfo.Capability)))
265 rc = CIFSSMBQFSPosixInfo(xid, tcon, buf);
268 * Only need to call the old QFSInfo if failed on newer one,
271 if (rc && (tcon->ses->capabilities & CAP_NT_SMBS))
272 rc = CIFSSMBQFSInfo(xid, tcon, buf);
275 * Some old Windows servers also do not support level 103, retry with
276 * older level one if old server failed the previous call or we
277 * bypassed it because we detected that this was an older LANMAN sess
280 rc = SMBOldQFSInfo(xid, tcon, buf);
286 static int cifs_permission(struct inode *inode, int mask, unsigned int flags)
288 struct cifs_sb_info *cifs_sb;
290 if (flags & IPERM_FLAG_RCU)
293 cifs_sb = CIFS_SB(inode->i_sb);
295 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) {
296 if ((mask & MAY_EXEC) && !execute_ok(inode))
300 } else /* file mode might have been restricted at mount time
301 on the client (above and beyond ACL on servers) for
302 servers which do not support setting and viewing mode bits,
303 so allowing client to check permissions is useful */
304 return generic_permission(inode, mask, flags, NULL);
307 static struct kmem_cache *cifs_inode_cachep;
308 static struct kmem_cache *cifs_req_cachep;
309 static struct kmem_cache *cifs_mid_cachep;
310 static struct kmem_cache *cifs_sm_req_cachep;
311 mempool_t *cifs_sm_req_poolp;
312 mempool_t *cifs_req_poolp;
313 mempool_t *cifs_mid_poolp;
315 static struct inode *
316 cifs_alloc_inode(struct super_block *sb)
318 struct cifsInodeInfo *cifs_inode;
319 cifs_inode = kmem_cache_alloc(cifs_inode_cachep, GFP_KERNEL);
322 cifs_inode->cifsAttrs = 0x20; /* default */
323 cifs_inode->time = 0;
324 /* Until the file is open and we have gotten oplock
325 info back from the server, can not assume caching of
326 file data or metadata */
327 cifs_set_oplock_level(cifs_inode, 0);
328 cifs_inode->delete_pending = false;
329 cifs_inode->invalid_mapping = false;
330 cifs_inode->vfs_inode.i_blkbits = 14; /* 2**14 = CIFS_MAX_MSGSIZE */
331 cifs_inode->server_eof = 0;
332 cifs_inode->uniqueid = 0;
333 cifs_inode->createtime = 0;
335 /* Can not set i_flags here - they get immediately overwritten
336 to zero by the VFS */
337 /* cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME;*/
338 INIT_LIST_HEAD(&cifs_inode->openFileList);
339 return &cifs_inode->vfs_inode;
342 static void cifs_i_callback(struct rcu_head *head)
344 struct inode *inode = container_of(head, struct inode, i_rcu);
345 INIT_LIST_HEAD(&inode->i_dentry);
346 kmem_cache_free(cifs_inode_cachep, CIFS_I(inode));
350 cifs_destroy_inode(struct inode *inode)
352 call_rcu(&inode->i_rcu, cifs_i_callback);
356 cifs_evict_inode(struct inode *inode)
358 truncate_inode_pages(&inode->i_data, 0);
359 end_writeback(inode);
360 cifs_fscache_release_inode_cookie(inode);
364 cifs_show_address(struct seq_file *s, struct TCP_Server_Info *server)
366 struct sockaddr_in *sa = (struct sockaddr_in *) &server->dstaddr;
367 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *) &server->dstaddr;
369 seq_printf(s, ",addr=");
371 switch (server->dstaddr.ss_family) {
373 seq_printf(s, "%pI4", &sa->sin_addr.s_addr);
376 seq_printf(s, "%pI6", &sa6->sin6_addr.s6_addr);
377 if (sa6->sin6_scope_id)
378 seq_printf(s, "%%%u", sa6->sin6_scope_id);
381 seq_printf(s, "(unknown)");
386 * cifs_show_options() is for displaying mount options in /proc/mounts.
387 * Not all settable options are displayed but most of the important
391 cifs_show_options(struct seq_file *s, struct vfsmount *m)
393 struct cifs_sb_info *cifs_sb = CIFS_SB(m->mnt_sb);
394 struct cifsTconInfo *tcon = cifs_sb_master_tcon(cifs_sb);
395 struct sockaddr *srcaddr;
396 srcaddr = (struct sockaddr *)&tcon->ses->server->srcaddr;
398 seq_printf(s, ",unc=%s", tcon->treeName);
400 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER)
401 seq_printf(s, ",multiuser");
402 else if (tcon->ses->userName)
403 seq_printf(s, ",username=%s", tcon->ses->userName);
405 if (tcon->ses->domainName)
406 seq_printf(s, ",domain=%s", tcon->ses->domainName);
408 if (srcaddr->sa_family != AF_UNSPEC) {
409 struct sockaddr_in *saddr4;
410 struct sockaddr_in6 *saddr6;
411 saddr4 = (struct sockaddr_in *)srcaddr;
412 saddr6 = (struct sockaddr_in6 *)srcaddr;
413 if (srcaddr->sa_family == AF_INET6)
414 seq_printf(s, ",srcaddr=%pI6c",
416 else if (srcaddr->sa_family == AF_INET)
417 seq_printf(s, ",srcaddr=%pI4",
418 &saddr4->sin_addr.s_addr);
420 seq_printf(s, ",srcaddr=BAD-AF:%i",
421 (int)(srcaddr->sa_family));
424 seq_printf(s, ",uid=%d", cifs_sb->mnt_uid);
425 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)
426 seq_printf(s, ",forceuid");
428 seq_printf(s, ",noforceuid");
430 seq_printf(s, ",gid=%d", cifs_sb->mnt_gid);
431 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)
432 seq_printf(s, ",forcegid");
434 seq_printf(s, ",noforcegid");
436 cifs_show_address(s, tcon->ses->server);
439 seq_printf(s, ",file_mode=0%o,dir_mode=0%o",
440 cifs_sb->mnt_file_mode,
441 cifs_sb->mnt_dir_mode);
443 seq_printf(s, ",seal");
445 seq_printf(s, ",nocase");
447 seq_printf(s, ",hard");
448 if (cifs_sb->prepath)
449 seq_printf(s, ",prepath=%s", cifs_sb->prepath);
450 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
451 seq_printf(s, ",posixpaths");
452 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)
453 seq_printf(s, ",setuids");
454 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
455 seq_printf(s, ",serverino");
456 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO)
457 seq_printf(s, ",directio");
458 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
459 seq_printf(s, ",nouser_xattr");
460 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR)
461 seq_printf(s, ",mapchars");
462 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)
463 seq_printf(s, ",sfu");
464 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
465 seq_printf(s, ",nobrl");
466 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
467 seq_printf(s, ",cifsacl");
468 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)
469 seq_printf(s, ",dynperm");
470 if (m->mnt_sb->s_flags & MS_POSIXACL)
471 seq_printf(s, ",acl");
472 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS)
473 seq_printf(s, ",mfsymlinks");
474 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_FSCACHE)
475 seq_printf(s, ",fsc");
477 seq_printf(s, ",rsize=%d", cifs_sb->rsize);
478 seq_printf(s, ",wsize=%d", cifs_sb->wsize);
479 /* convert actimeo and display it in seconds */
480 seq_printf(s, ",actimeo=%lu", cifs_sb->actimeo / HZ);
485 static void cifs_umount_begin(struct super_block *sb)
487 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
488 struct cifsTconInfo *tcon;
493 tcon = cifs_sb_master_tcon(cifs_sb);
495 spin_lock(&cifs_tcp_ses_lock);
496 if ((tcon->tc_count > 1) || (tcon->tidStatus == CifsExiting)) {
497 /* we have other mounts to same share or we have
498 already tried to force umount this and woken up
499 all waiting network requests, nothing to do */
500 spin_unlock(&cifs_tcp_ses_lock);
502 } else if (tcon->tc_count == 1)
503 tcon->tidStatus = CifsExiting;
504 spin_unlock(&cifs_tcp_ses_lock);
506 /* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */
507 /* cancel_notify_requests(tcon); */
508 if (tcon->ses && tcon->ses->server) {
509 cFYI(1, "wake up tasks now - umount begin not complete");
510 wake_up_all(&tcon->ses->server->request_q);
511 wake_up_all(&tcon->ses->server->response_q);
512 msleep(1); /* yield */
513 /* we have to kick the requests once more */
514 wake_up_all(&tcon->ses->server->response_q);
521 #ifdef CONFIG_CIFS_STATS2
522 static int cifs_show_stats(struct seq_file *s, struct vfsmount *mnt)
529 static int cifs_remount(struct super_block *sb, int *flags, char *data)
531 *flags |= MS_NODIRATIME;
535 static int cifs_drop_inode(struct inode *inode)
537 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
539 /* no serverino => unconditional eviction */
540 return !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) ||
541 generic_drop_inode(inode);
544 static const struct super_operations cifs_super_ops = {
545 .put_super = cifs_put_super,
546 .statfs = cifs_statfs,
547 .alloc_inode = cifs_alloc_inode,
548 .destroy_inode = cifs_destroy_inode,
549 .drop_inode = cifs_drop_inode,
550 .evict_inode = cifs_evict_inode,
551 /* .delete_inode = cifs_delete_inode, */ /* Do not need above
552 function unless later we add lazy close of inodes or unless the
553 kernel forgets to call us with the same number of releases (closes)
555 .show_options = cifs_show_options,
556 .umount_begin = cifs_umount_begin,
557 .remount_fs = cifs_remount,
558 #ifdef CONFIG_CIFS_STATS2
559 .show_stats = cifs_show_stats,
563 static struct dentry *
564 cifs_do_mount(struct file_system_type *fs_type,
565 int flags, const char *dev_name, void *data)
568 struct super_block *sb;
570 sb = sget(fs_type, NULL, set_anon_super, NULL);
572 cFYI(1, "Devname: %s flags: %d ", dev_name, flags);
579 rc = cifs_read_super(sb, data, dev_name, flags & MS_SILENT ? 1 : 0);
581 deactivate_locked_super(sb);
584 sb->s_flags |= MS_ACTIVE;
585 return dget(sb->s_root);
588 static ssize_t cifs_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
589 unsigned long nr_segs, loff_t pos)
591 struct inode *inode = iocb->ki_filp->f_path.dentry->d_inode;
594 written = generic_file_aio_write(iocb, iov, nr_segs, pos);
595 if (!CIFS_I(inode)->clientCanCacheAll)
596 filemap_fdatawrite(inode->i_mapping);
600 static loff_t cifs_llseek(struct file *file, loff_t offset, int origin)
602 /* origin == SEEK_END => we must revalidate the cached file length */
603 if (origin == SEEK_END) {
606 /* some applications poll for the file length in this strange
607 way so we must seek to end on non-oplocked files by
608 setting the revalidate time to zero */
609 CIFS_I(file->f_path.dentry->d_inode)->time = 0;
611 retval = cifs_revalidate_file(file);
613 return (loff_t)retval;
615 return generic_file_llseek_unlocked(file, offset, origin);
618 static int cifs_setlease(struct file *file, long arg, struct file_lock **lease)
620 /* note that this is called by vfs setlease with lock_flocks held
621 to protect *lease from going away */
622 struct inode *inode = file->f_path.dentry->d_inode;
623 struct cifsFileInfo *cfile = file->private_data;
625 if (!(S_ISREG(inode->i_mode)))
628 /* check if file is oplocked */
629 if (((arg == F_RDLCK) &&
630 (CIFS_I(inode)->clientCanCacheRead)) ||
632 (CIFS_I(inode)->clientCanCacheAll)))
633 return generic_setlease(file, arg, lease);
634 else if (tlink_tcon(cfile->tlink)->local_lease &&
635 !CIFS_I(inode)->clientCanCacheRead)
636 /* If the server claims to support oplock on this
637 file, then we still need to check oplock even
638 if the local_lease mount option is set, but there
639 are servers which do not support oplock for which
640 this mount option may be useful if the user
641 knows that the file won't be changed on the server
643 return generic_setlease(file, arg, lease);
648 struct file_system_type cifs_fs_type = {
649 .owner = THIS_MODULE,
651 .mount = cifs_do_mount,
652 .kill_sb = kill_anon_super,
655 const struct inode_operations cifs_dir_inode_ops = {
656 .create = cifs_create,
657 .lookup = cifs_lookup,
658 .getattr = cifs_getattr,
659 .unlink = cifs_unlink,
660 .link = cifs_hardlink,
663 .rename = cifs_rename,
664 .permission = cifs_permission,
665 /* revalidate:cifs_revalidate, */
666 .setattr = cifs_setattr,
667 .symlink = cifs_symlink,
669 #ifdef CONFIG_CIFS_XATTR
670 .setxattr = cifs_setxattr,
671 .getxattr = cifs_getxattr,
672 .listxattr = cifs_listxattr,
673 .removexattr = cifs_removexattr,
677 const struct inode_operations cifs_file_inode_ops = {
678 /* revalidate:cifs_revalidate, */
679 .setattr = cifs_setattr,
680 .getattr = cifs_getattr, /* do we need this anymore? */
681 .rename = cifs_rename,
682 .permission = cifs_permission,
683 #ifdef CONFIG_CIFS_XATTR
684 .setxattr = cifs_setxattr,
685 .getxattr = cifs_getxattr,
686 .listxattr = cifs_listxattr,
687 .removexattr = cifs_removexattr,
691 const struct inode_operations cifs_symlink_inode_ops = {
692 .readlink = generic_readlink,
693 .follow_link = cifs_follow_link,
694 .put_link = cifs_put_link,
695 .permission = cifs_permission,
696 /* BB add the following two eventually */
697 /* revalidate: cifs_revalidate,
698 setattr: cifs_notify_change, *//* BB do we need notify change */
699 #ifdef CONFIG_CIFS_XATTR
700 .setxattr = cifs_setxattr,
701 .getxattr = cifs_getxattr,
702 .listxattr = cifs_listxattr,
703 .removexattr = cifs_removexattr,
707 const struct file_operations cifs_file_ops = {
708 .read = do_sync_read,
709 .write = do_sync_write,
710 .aio_read = generic_file_aio_read,
711 .aio_write = cifs_file_aio_write,
713 .release = cifs_close,
717 .mmap = cifs_file_mmap,
718 .splice_read = generic_file_splice_read,
719 .llseek = cifs_llseek,
720 #ifdef CONFIG_CIFS_POSIX
721 .unlocked_ioctl = cifs_ioctl,
722 #endif /* CONFIG_CIFS_POSIX */
723 .setlease = cifs_setlease,
726 const struct file_operations cifs_file_direct_ops = {
727 /* no aio, no readv -
728 BB reevaluate whether they can be done with directio, no cache */
729 .read = cifs_user_read,
730 .write = cifs_user_write,
732 .release = cifs_close,
736 .mmap = cifs_file_mmap,
737 .splice_read = generic_file_splice_read,
738 #ifdef CONFIG_CIFS_POSIX
739 .unlocked_ioctl = cifs_ioctl,
740 #endif /* CONFIG_CIFS_POSIX */
741 .llseek = cifs_llseek,
742 .setlease = cifs_setlease,
744 const struct file_operations cifs_file_nobrl_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,
753 .mmap = cifs_file_mmap,
754 .splice_read = generic_file_splice_read,
755 .llseek = cifs_llseek,
756 #ifdef CONFIG_CIFS_POSIX
757 .unlocked_ioctl = cifs_ioctl,
758 #endif /* CONFIG_CIFS_POSIX */
759 .setlease = cifs_setlease,
762 const struct file_operations cifs_file_direct_nobrl_ops = {
763 /* no mmap, no aio, no readv -
764 BB reevaluate whether they can be done with directio, no cache */
765 .read = cifs_user_read,
766 .write = cifs_user_write,
768 .release = cifs_close,
771 .mmap = cifs_file_mmap,
772 .splice_read = generic_file_splice_read,
773 #ifdef CONFIG_CIFS_POSIX
774 .unlocked_ioctl = cifs_ioctl,
775 #endif /* CONFIG_CIFS_POSIX */
776 .llseek = cifs_llseek,
777 .setlease = cifs_setlease,
780 const struct file_operations cifs_dir_ops = {
781 .readdir = cifs_readdir,
782 .release = cifs_closedir,
783 .read = generic_read_dir,
784 .unlocked_ioctl = cifs_ioctl,
785 .llseek = generic_file_llseek,
789 cifs_init_once(void *inode)
791 struct cifsInodeInfo *cifsi = inode;
793 inode_init_once(&cifsi->vfs_inode);
794 INIT_LIST_HEAD(&cifsi->lockList);
798 cifs_init_inodecache(void)
800 cifs_inode_cachep = kmem_cache_create("cifs_inode_cache",
801 sizeof(struct cifsInodeInfo),
802 0, (SLAB_RECLAIM_ACCOUNT|
805 if (cifs_inode_cachep == NULL)
812 cifs_destroy_inodecache(void)
814 kmem_cache_destroy(cifs_inode_cachep);
818 cifs_init_request_bufs(void)
820 if (CIFSMaxBufSize < 8192) {
821 /* Buffer size can not be smaller than 2 * PATH_MAX since maximum
822 Unicode path name has to fit in any SMB/CIFS path based frames */
823 CIFSMaxBufSize = 8192;
824 } else if (CIFSMaxBufSize > 1024*127) {
825 CIFSMaxBufSize = 1024 * 127;
827 CIFSMaxBufSize &= 0x1FE00; /* Round size to even 512 byte mult*/
829 /* cERROR(1, "CIFSMaxBufSize %d 0x%x",CIFSMaxBufSize,CIFSMaxBufSize); */
830 cifs_req_cachep = kmem_cache_create("cifs_request",
832 MAX_CIFS_HDR_SIZE, 0,
833 SLAB_HWCACHE_ALIGN, NULL);
834 if (cifs_req_cachep == NULL)
837 if (cifs_min_rcv < 1)
839 else if (cifs_min_rcv > 64) {
841 cERROR(1, "cifs_min_rcv set to maximum (64)");
844 cifs_req_poolp = mempool_create_slab_pool(cifs_min_rcv,
847 if (cifs_req_poolp == NULL) {
848 kmem_cache_destroy(cifs_req_cachep);
851 /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and
852 almost all handle based requests (but not write response, nor is it
853 sufficient for path based requests). A smaller size would have
854 been more efficient (compacting multiple slab items on one 4k page)
855 for the case in which debug was on, but this larger size allows
856 more SMBs to use small buffer alloc and is still much more
857 efficient to alloc 1 per page off the slab compared to 17K (5page)
858 alloc of large cifs buffers even when page debugging is on */
859 cifs_sm_req_cachep = kmem_cache_create("cifs_small_rq",
860 MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN,
862 if (cifs_sm_req_cachep == NULL) {
863 mempool_destroy(cifs_req_poolp);
864 kmem_cache_destroy(cifs_req_cachep);
868 if (cifs_min_small < 2)
870 else if (cifs_min_small > 256) {
871 cifs_min_small = 256;
872 cFYI(1, "cifs_min_small set to maximum (256)");
875 cifs_sm_req_poolp = mempool_create_slab_pool(cifs_min_small,
878 if (cifs_sm_req_poolp == NULL) {
879 mempool_destroy(cifs_req_poolp);
880 kmem_cache_destroy(cifs_req_cachep);
881 kmem_cache_destroy(cifs_sm_req_cachep);
889 cifs_destroy_request_bufs(void)
891 mempool_destroy(cifs_req_poolp);
892 kmem_cache_destroy(cifs_req_cachep);
893 mempool_destroy(cifs_sm_req_poolp);
894 kmem_cache_destroy(cifs_sm_req_cachep);
900 cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids",
901 sizeof(struct mid_q_entry), 0,
902 SLAB_HWCACHE_ALIGN, NULL);
903 if (cifs_mid_cachep == NULL)
906 /* 3 is a reasonable minimum number of simultaneous operations */
907 cifs_mid_poolp = mempool_create_slab_pool(3, cifs_mid_cachep);
908 if (cifs_mid_poolp == NULL) {
909 kmem_cache_destroy(cifs_mid_cachep);
917 cifs_destroy_mids(void)
919 mempool_destroy(cifs_mid_poolp);
920 kmem_cache_destroy(cifs_mid_cachep);
928 INIT_LIST_HEAD(&cifs_tcp_ses_list);
929 #ifdef CONFIG_CIFS_EXPERIMENTAL
930 INIT_LIST_HEAD(&GlobalDnotifyReqList);
931 INIT_LIST_HEAD(&GlobalDnotifyRsp_Q);
934 * Initialize Global counters
936 atomic_set(&sesInfoAllocCount, 0);
937 atomic_set(&tconInfoAllocCount, 0);
938 atomic_set(&tcpSesAllocCount, 0);
939 atomic_set(&tcpSesReconnectCount, 0);
940 atomic_set(&tconInfoReconnectCount, 0);
942 atomic_set(&bufAllocCount, 0);
943 atomic_set(&smBufAllocCount, 0);
944 #ifdef CONFIG_CIFS_STATS2
945 atomic_set(&totBufAllocCount, 0);
946 atomic_set(&totSmBufAllocCount, 0);
947 #endif /* CONFIG_CIFS_STATS2 */
949 atomic_set(&midCount, 0);
950 GlobalCurrentXid = 0;
951 GlobalTotalActiveXid = 0;
952 GlobalMaxActiveXid = 0;
953 spin_lock_init(&cifs_tcp_ses_lock);
954 spin_lock_init(&cifs_file_list_lock);
955 spin_lock_init(&GlobalMid_Lock);
957 if (cifs_max_pending < 2) {
958 cifs_max_pending = 2;
959 cFYI(1, "cifs_max_pending set to min of 2");
960 } else if (cifs_max_pending > 256) {
961 cifs_max_pending = 256;
962 cFYI(1, "cifs_max_pending set to max of 256");
965 rc = cifs_fscache_register();
969 rc = cifs_init_inodecache();
971 goto out_unreg_fscache;
973 rc = cifs_init_mids();
975 goto out_destroy_inodecache;
977 rc = cifs_init_request_bufs();
979 goto out_destroy_mids;
981 rc = register_filesystem(&cifs_fs_type);
983 goto out_destroy_request_bufs;
984 #ifdef CONFIG_CIFS_UPCALL
985 rc = register_key_type(&cifs_spnego_key_type);
987 goto out_unregister_filesystem;
992 #ifdef CONFIG_CIFS_UPCALL
993 out_unregister_filesystem:
994 unregister_filesystem(&cifs_fs_type);
996 out_destroy_request_bufs:
997 cifs_destroy_request_bufs();
1000 out_destroy_inodecache:
1001 cifs_destroy_inodecache();
1003 cifs_fscache_unregister();
1012 cFYI(DBG2, "exit_cifs");
1014 cifs_fscache_unregister();
1015 #ifdef CONFIG_CIFS_DFS_UPCALL
1016 cifs_dfs_release_automount_timer();
1018 #ifdef CONFIG_CIFS_UPCALL
1019 unregister_key_type(&cifs_spnego_key_type);
1021 unregister_filesystem(&cifs_fs_type);
1022 cifs_destroy_inodecache();
1023 cifs_destroy_mids();
1024 cifs_destroy_request_bufs();
1027 MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>");
1028 MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */
1030 ("VFS to access servers complying with the SNIA CIFS Specification "
1031 "e.g. Samba and Windows");
1032 MODULE_VERSION(CIFS_VERSION);
1033 module_init(init_cifs)
1034 module_exit(exit_cifs)