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_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_tcon(cifs_sb);
368 struct sockaddr *srcaddr;
369 srcaddr = (struct sockaddr *)&tcon->ses->server->srcaddr;
371 seq_printf(s, ",unc=%s", tcon->treeName);
372 if (tcon->ses->userName)
373 seq_printf(s, ",username=%s", tcon->ses->userName);
374 if (tcon->ses->domainName)
375 seq_printf(s, ",domain=%s", tcon->ses->domainName);
377 if (srcaddr->sa_family != AF_UNSPEC) {
378 struct sockaddr_in *saddr4;
379 struct sockaddr_in6 *saddr6;
380 saddr4 = (struct sockaddr_in *)srcaddr;
381 saddr6 = (struct sockaddr_in6 *)srcaddr;
382 if (srcaddr->sa_family == AF_INET6)
383 seq_printf(s, ",srcaddr=%pI6c",
385 else if (srcaddr->sa_family == AF_INET)
386 seq_printf(s, ",srcaddr=%pI4",
387 &saddr4->sin_addr.s_addr);
389 seq_printf(s, ",srcaddr=BAD-AF:%i",
390 (int)(srcaddr->sa_family));
393 seq_printf(s, ",uid=%d", cifs_sb->mnt_uid);
394 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)
395 seq_printf(s, ",forceuid");
397 seq_printf(s, ",noforceuid");
399 seq_printf(s, ",gid=%d", cifs_sb->mnt_gid);
400 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)
401 seq_printf(s, ",forcegid");
403 seq_printf(s, ",noforcegid");
405 cifs_show_address(s, tcon->ses->server);
408 seq_printf(s, ",file_mode=0%o,dir_mode=0%o",
409 cifs_sb->mnt_file_mode,
410 cifs_sb->mnt_dir_mode);
412 seq_printf(s, ",seal");
414 seq_printf(s, ",nocase");
416 seq_printf(s, ",hard");
417 if (cifs_sb->prepath)
418 seq_printf(s, ",prepath=%s", cifs_sb->prepath);
419 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
420 seq_printf(s, ",posixpaths");
421 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)
422 seq_printf(s, ",setuids");
423 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
424 seq_printf(s, ",serverino");
425 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO)
426 seq_printf(s, ",directio");
427 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
428 seq_printf(s, ",nouser_xattr");
429 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR)
430 seq_printf(s, ",mapchars");
431 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)
432 seq_printf(s, ",sfu");
433 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
434 seq_printf(s, ",nobrl");
435 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
436 seq_printf(s, ",cifsacl");
437 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)
438 seq_printf(s, ",dynperm");
439 if (m->mnt_sb->s_flags & MS_POSIXACL)
440 seq_printf(s, ",acl");
441 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS)
442 seq_printf(s, ",mfsymlinks");
444 seq_printf(s, ",rsize=%d", cifs_sb->rsize);
445 seq_printf(s, ",wsize=%d", cifs_sb->wsize);
450 static void cifs_umount_begin(struct super_block *sb)
452 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
453 struct cifsTconInfo *tcon;
458 tcon = cifs_sb_tcon(cifs_sb);
460 read_lock(&cifs_tcp_ses_lock);
461 if ((tcon->tc_count > 1) || (tcon->tidStatus == CifsExiting)) {
462 /* we have other mounts to same share or we have
463 already tried to force umount this and woken up
464 all waiting network requests, nothing to do */
465 read_unlock(&cifs_tcp_ses_lock);
467 } else if (tcon->tc_count == 1)
468 tcon->tidStatus = CifsExiting;
469 read_unlock(&cifs_tcp_ses_lock);
471 /* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */
472 /* cancel_notify_requests(tcon); */
473 if (tcon->ses && tcon->ses->server) {
474 cFYI(1, "wake up tasks now - umount begin not complete");
475 wake_up_all(&tcon->ses->server->request_q);
476 wake_up_all(&tcon->ses->server->response_q);
477 msleep(1); /* yield */
478 /* we have to kick the requests once more */
479 wake_up_all(&tcon->ses->server->response_q);
486 #ifdef CONFIG_CIFS_STATS2
487 static int cifs_show_stats(struct seq_file *s, struct vfsmount *mnt)
494 static int cifs_remount(struct super_block *sb, int *flags, char *data)
496 *flags |= MS_NODIRATIME;
500 static int cifs_drop_inode(struct inode *inode)
502 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
504 /* no serverino => unconditional eviction */
505 return !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) ||
506 generic_drop_inode(inode);
509 static const struct super_operations cifs_super_ops = {
510 .put_super = cifs_put_super,
511 .statfs = cifs_statfs,
512 .alloc_inode = cifs_alloc_inode,
513 .destroy_inode = cifs_destroy_inode,
514 .drop_inode = cifs_drop_inode,
515 .evict_inode = cifs_evict_inode,
516 /* .delete_inode = cifs_delete_inode, */ /* Do not need above
517 function unless later we add lazy close of inodes or unless the
518 kernel forgets to call us with the same number of releases (closes)
520 .show_options = cifs_show_options,
521 .umount_begin = cifs_umount_begin,
522 .remount_fs = cifs_remount,
523 #ifdef CONFIG_CIFS_STATS2
524 .show_stats = cifs_show_stats,
529 cifs_get_sb(struct file_system_type *fs_type,
530 int flags, const char *dev_name, void *data, struct vfsmount *mnt)
533 struct super_block *sb = sget(fs_type, NULL, set_anon_super, NULL);
535 cFYI(1, "Devname: %s flags: %d ", dev_name, flags);
542 rc = cifs_read_super(sb, data, dev_name, flags & MS_SILENT ? 1 : 0);
544 deactivate_locked_super(sb);
547 sb->s_flags |= MS_ACTIVE;
548 simple_set_mnt(mnt, sb);
552 static ssize_t cifs_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
553 unsigned long nr_segs, loff_t pos)
555 struct inode *inode = iocb->ki_filp->f_path.dentry->d_inode;
558 written = generic_file_aio_write(iocb, iov, nr_segs, pos);
559 if (!CIFS_I(inode)->clientCanCacheAll)
560 filemap_fdatawrite(inode->i_mapping);
564 static loff_t cifs_llseek(struct file *file, loff_t offset, int origin)
566 /* origin == SEEK_END => we must revalidate the cached file length */
567 if (origin == SEEK_END) {
570 /* some applications poll for the file length in this strange
571 way so we must seek to end on non-oplocked files by
572 setting the revalidate time to zero */
573 CIFS_I(file->f_path.dentry->d_inode)->time = 0;
575 retval = cifs_revalidate_file(file);
577 return (loff_t)retval;
579 return generic_file_llseek_unlocked(file, offset, origin);
582 static int cifs_setlease(struct file *file, long arg, struct file_lock **lease)
584 /* note that this is called by vfs setlease with the BKL held
585 although I doubt that BKL is needed here in cifs */
586 struct inode *inode = file->f_path.dentry->d_inode;
587 struct cifsFileInfo *cfile = file->private_data;
589 if (!(S_ISREG(inode->i_mode)))
592 /* check if file is oplocked */
593 if (((arg == F_RDLCK) &&
594 (CIFS_I(inode)->clientCanCacheRead)) ||
596 (CIFS_I(inode)->clientCanCacheAll)))
597 return generic_setlease(file, arg, lease);
598 else if (cfile->tcon->local_lease && !CIFS_I(inode)->clientCanCacheRead)
599 /* If the server claims to support oplock on this
600 file, then we still need to check oplock even
601 if the local_lease mount option is set, but there
602 are servers which do not support oplock for which
603 this mount option may be useful if the user
604 knows that the file won't be changed on the server
606 return generic_setlease(file, arg, lease);
611 struct file_system_type cifs_fs_type = {
612 .owner = THIS_MODULE,
614 .get_sb = cifs_get_sb,
615 .kill_sb = kill_anon_super,
618 const struct inode_operations cifs_dir_inode_ops = {
619 .create = cifs_create,
620 .lookup = cifs_lookup,
621 .getattr = cifs_getattr,
622 .unlink = cifs_unlink,
623 .link = cifs_hardlink,
626 .rename = cifs_rename,
627 .permission = cifs_permission,
628 /* revalidate:cifs_revalidate, */
629 .setattr = cifs_setattr,
630 .symlink = cifs_symlink,
632 #ifdef CONFIG_CIFS_XATTR
633 .setxattr = cifs_setxattr,
634 .getxattr = cifs_getxattr,
635 .listxattr = cifs_listxattr,
636 .removexattr = cifs_removexattr,
640 const struct inode_operations cifs_file_inode_ops = {
641 /* revalidate:cifs_revalidate, */
642 .setattr = cifs_setattr,
643 .getattr = cifs_getattr, /* do we need this anymore? */
644 .rename = cifs_rename,
645 .permission = cifs_permission,
646 #ifdef CONFIG_CIFS_XATTR
647 .setxattr = cifs_setxattr,
648 .getxattr = cifs_getxattr,
649 .listxattr = cifs_listxattr,
650 .removexattr = cifs_removexattr,
654 const struct inode_operations cifs_symlink_inode_ops = {
655 .readlink = generic_readlink,
656 .follow_link = cifs_follow_link,
657 .put_link = cifs_put_link,
658 .permission = cifs_permission,
659 /* BB add the following two eventually */
660 /* revalidate: cifs_revalidate,
661 setattr: cifs_notify_change, *//* BB do we need notify change */
662 #ifdef CONFIG_CIFS_XATTR
663 .setxattr = cifs_setxattr,
664 .getxattr = cifs_getxattr,
665 .listxattr = cifs_listxattr,
666 .removexattr = cifs_removexattr,
670 const struct file_operations cifs_file_ops = {
671 .read = do_sync_read,
672 .write = do_sync_write,
673 .aio_read = generic_file_aio_read,
674 .aio_write = cifs_file_aio_write,
676 .release = cifs_close,
680 .mmap = cifs_file_mmap,
681 .splice_read = generic_file_splice_read,
682 .llseek = cifs_llseek,
683 #ifdef CONFIG_CIFS_POSIX
684 .unlocked_ioctl = cifs_ioctl,
685 #endif /* CONFIG_CIFS_POSIX */
686 .setlease = cifs_setlease,
689 const struct file_operations cifs_file_direct_ops = {
690 /* no aio, no readv -
691 BB reevaluate whether they can be done with directio, no cache */
692 .read = cifs_user_read,
693 .write = cifs_user_write,
695 .release = cifs_close,
699 .mmap = cifs_file_mmap,
700 .splice_read = generic_file_splice_read,
701 #ifdef CONFIG_CIFS_POSIX
702 .unlocked_ioctl = cifs_ioctl,
703 #endif /* CONFIG_CIFS_POSIX */
704 .llseek = cifs_llseek,
705 .setlease = cifs_setlease,
707 const struct file_operations cifs_file_nobrl_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,
716 .mmap = cifs_file_mmap,
717 .splice_read = generic_file_splice_read,
718 .llseek = cifs_llseek,
719 #ifdef CONFIG_CIFS_POSIX
720 .unlocked_ioctl = cifs_ioctl,
721 #endif /* CONFIG_CIFS_POSIX */
722 .setlease = cifs_setlease,
725 const struct file_operations cifs_file_direct_nobrl_ops = {
726 /* no mmap, no aio, no readv -
727 BB reevaluate whether they can be done with directio, no cache */
728 .read = cifs_user_read,
729 .write = cifs_user_write,
731 .release = cifs_close,
734 .mmap = cifs_file_mmap,
735 .splice_read = generic_file_splice_read,
736 #ifdef CONFIG_CIFS_POSIX
737 .unlocked_ioctl = cifs_ioctl,
738 #endif /* CONFIG_CIFS_POSIX */
739 .llseek = cifs_llseek,
740 .setlease = cifs_setlease,
743 const struct file_operations cifs_dir_ops = {
744 .readdir = cifs_readdir,
745 .release = cifs_closedir,
746 .read = generic_read_dir,
747 .unlocked_ioctl = cifs_ioctl,
748 .llseek = generic_file_llseek,
752 cifs_init_once(void *inode)
754 struct cifsInodeInfo *cifsi = inode;
756 inode_init_once(&cifsi->vfs_inode);
757 INIT_LIST_HEAD(&cifsi->lockList);
761 cifs_init_inodecache(void)
763 cifs_inode_cachep = kmem_cache_create("cifs_inode_cache",
764 sizeof(struct cifsInodeInfo),
765 0, (SLAB_RECLAIM_ACCOUNT|
768 if (cifs_inode_cachep == NULL)
775 cifs_destroy_inodecache(void)
777 kmem_cache_destroy(cifs_inode_cachep);
781 cifs_init_request_bufs(void)
783 if (CIFSMaxBufSize < 8192) {
784 /* Buffer size can not be smaller than 2 * PATH_MAX since maximum
785 Unicode path name has to fit in any SMB/CIFS path based frames */
786 CIFSMaxBufSize = 8192;
787 } else if (CIFSMaxBufSize > 1024*127) {
788 CIFSMaxBufSize = 1024 * 127;
790 CIFSMaxBufSize &= 0x1FE00; /* Round size to even 512 byte mult*/
792 /* cERROR(1, "CIFSMaxBufSize %d 0x%x",CIFSMaxBufSize,CIFSMaxBufSize); */
793 cifs_req_cachep = kmem_cache_create("cifs_request",
795 MAX_CIFS_HDR_SIZE, 0,
796 SLAB_HWCACHE_ALIGN, NULL);
797 if (cifs_req_cachep == NULL)
800 if (cifs_min_rcv < 1)
802 else if (cifs_min_rcv > 64) {
804 cERROR(1, "cifs_min_rcv set to maximum (64)");
807 cifs_req_poolp = mempool_create_slab_pool(cifs_min_rcv,
810 if (cifs_req_poolp == NULL) {
811 kmem_cache_destroy(cifs_req_cachep);
814 /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and
815 almost all handle based requests (but not write response, nor is it
816 sufficient for path based requests). A smaller size would have
817 been more efficient (compacting multiple slab items on one 4k page)
818 for the case in which debug was on, but this larger size allows
819 more SMBs to use small buffer alloc and is still much more
820 efficient to alloc 1 per page off the slab compared to 17K (5page)
821 alloc of large cifs buffers even when page debugging is on */
822 cifs_sm_req_cachep = kmem_cache_create("cifs_small_rq",
823 MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN,
825 if (cifs_sm_req_cachep == NULL) {
826 mempool_destroy(cifs_req_poolp);
827 kmem_cache_destroy(cifs_req_cachep);
831 if (cifs_min_small < 2)
833 else if (cifs_min_small > 256) {
834 cifs_min_small = 256;
835 cFYI(1, "cifs_min_small set to maximum (256)");
838 cifs_sm_req_poolp = mempool_create_slab_pool(cifs_min_small,
841 if (cifs_sm_req_poolp == NULL) {
842 mempool_destroy(cifs_req_poolp);
843 kmem_cache_destroy(cifs_req_cachep);
844 kmem_cache_destroy(cifs_sm_req_cachep);
852 cifs_destroy_request_bufs(void)
854 mempool_destroy(cifs_req_poolp);
855 kmem_cache_destroy(cifs_req_cachep);
856 mempool_destroy(cifs_sm_req_poolp);
857 kmem_cache_destroy(cifs_sm_req_cachep);
863 cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids",
864 sizeof(struct mid_q_entry), 0,
865 SLAB_HWCACHE_ALIGN, NULL);
866 if (cifs_mid_cachep == NULL)
869 /* 3 is a reasonable minimum number of simultaneous operations */
870 cifs_mid_poolp = mempool_create_slab_pool(3, cifs_mid_cachep);
871 if (cifs_mid_poolp == NULL) {
872 kmem_cache_destroy(cifs_mid_cachep);
880 cifs_destroy_mids(void)
882 mempool_destroy(cifs_mid_poolp);
883 kmem_cache_destroy(cifs_mid_cachep);
891 INIT_LIST_HEAD(&cifs_tcp_ses_list);
892 #ifdef CONFIG_CIFS_EXPERIMENTAL
893 INIT_LIST_HEAD(&GlobalDnotifyReqList);
894 INIT_LIST_HEAD(&GlobalDnotifyRsp_Q);
897 * Initialize Global counters
899 atomic_set(&sesInfoAllocCount, 0);
900 atomic_set(&tconInfoAllocCount, 0);
901 atomic_set(&tcpSesAllocCount, 0);
902 atomic_set(&tcpSesReconnectCount, 0);
903 atomic_set(&tconInfoReconnectCount, 0);
905 atomic_set(&bufAllocCount, 0);
906 atomic_set(&smBufAllocCount, 0);
907 #ifdef CONFIG_CIFS_STATS2
908 atomic_set(&totBufAllocCount, 0);
909 atomic_set(&totSmBufAllocCount, 0);
910 #endif /* CONFIG_CIFS_STATS2 */
912 atomic_set(&midCount, 0);
913 GlobalCurrentXid = 0;
914 GlobalTotalActiveXid = 0;
915 GlobalMaxActiveXid = 0;
916 memset(Local_System_Name, 0, 15);
917 rwlock_init(&GlobalSMBSeslock);
918 rwlock_init(&cifs_tcp_ses_lock);
919 spin_lock_init(&GlobalMid_Lock);
921 if (cifs_max_pending < 2) {
922 cifs_max_pending = 2;
923 cFYI(1, "cifs_max_pending set to min of 2");
924 } else if (cifs_max_pending > 256) {
925 cifs_max_pending = 256;
926 cFYI(1, "cifs_max_pending set to max of 256");
929 rc = cifs_fscache_register();
933 rc = cifs_init_inodecache();
935 goto out_unreg_fscache;
937 rc = cifs_init_mids();
939 goto out_destroy_inodecache;
941 rc = cifs_init_request_bufs();
943 goto out_destroy_mids;
945 rc = register_filesystem(&cifs_fs_type);
947 goto out_destroy_request_bufs;
948 #ifdef CONFIG_CIFS_UPCALL
949 rc = register_key_type(&cifs_spnego_key_type);
951 goto out_unregister_filesystem;
956 #ifdef CONFIG_CIFS_UPCALL
957 out_unregister_filesystem:
958 unregister_filesystem(&cifs_fs_type);
960 out_destroy_request_bufs:
961 cifs_destroy_request_bufs();
964 out_destroy_inodecache:
965 cifs_destroy_inodecache();
967 cifs_fscache_unregister();
976 cFYI(DBG2, "exit_cifs");
978 cifs_fscache_unregister();
979 #ifdef CONFIG_CIFS_DFS_UPCALL
980 cifs_dfs_release_automount_timer();
982 #ifdef CONFIG_CIFS_UPCALL
983 unregister_key_type(&cifs_spnego_key_type);
985 unregister_filesystem(&cifs_fs_type);
986 cifs_destroy_inodecache();
988 cifs_destroy_request_bufs();
991 MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>");
992 MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */
994 ("VFS to access servers complying with the SNIA CIFS Specification "
995 "e.g. Samba and Windows");
996 MODULE_VERSION(CIFS_VERSION);
997 module_init(init_cifs)
998 module_exit(exit_cifs)