1 /* -*- c -*- --------------------------------------------------------------- *
3 * linux/fs/autofs/root.c
5 * Copyright 1997-1998 Transmeta Corporation -- All Rights Reserved
6 * Copyright 1999-2000 Jeremy Fitzhardinge <jeremy@goop.org>
7 * Copyright 2001-2003 Ian Kent <raven@themaw.net>
9 * This file is part of the Linux kernel and is made available under
10 * the terms of the GNU General Public License, version 2, or at your
11 * option, any later version, incorporated herein by reference.
13 * ------------------------------------------------------------------------- */
15 #include <linux/capability.h>
16 #include <linux/errno.h>
17 #include <linux/stat.h>
18 #include <linux/param.h>
19 #include <linux/time.h>
20 #include <linux/smp_lock.h>
23 static int autofs4_dir_symlink(struct inode
*,struct dentry
*,const char *);
24 static int autofs4_dir_unlink(struct inode
*,struct dentry
*);
25 static int autofs4_dir_rmdir(struct inode
*,struct dentry
*);
26 static int autofs4_dir_mkdir(struct inode
*,struct dentry
*,int);
27 static int autofs4_root_ioctl(struct inode
*, struct file
*,unsigned int,unsigned long);
28 static int autofs4_dir_open(struct inode
*inode
, struct file
*file
);
29 static int autofs4_dir_close(struct inode
*inode
, struct file
*file
);
30 static int autofs4_dir_readdir(struct file
* filp
, void * dirent
, filldir_t filldir
);
31 static int autofs4_root_readdir(struct file
* filp
, void * dirent
, filldir_t filldir
);
32 static struct dentry
*autofs4_lookup(struct inode
*,struct dentry
*, struct nameidata
*);
33 static int autofs4_dcache_readdir(struct file
*, void *, filldir_t
);
35 struct file_operations autofs4_root_operations
= {
36 .open
= dcache_dir_open
,
37 .release
= dcache_dir_close
,
38 .read
= generic_read_dir
,
39 .readdir
= autofs4_root_readdir
,
40 .ioctl
= autofs4_root_ioctl
,
43 struct file_operations autofs4_dir_operations
= {
44 .open
= autofs4_dir_open
,
45 .release
= autofs4_dir_close
,
46 .read
= generic_read_dir
,
47 .readdir
= autofs4_dir_readdir
,
50 struct inode_operations autofs4_root_inode_operations
= {
51 .lookup
= autofs4_lookup
,
52 .unlink
= autofs4_dir_unlink
,
53 .symlink
= autofs4_dir_symlink
,
54 .mkdir
= autofs4_dir_mkdir
,
55 .rmdir
= autofs4_dir_rmdir
,
58 struct inode_operations autofs4_dir_inode_operations
= {
59 .lookup
= autofs4_lookup
,
60 .unlink
= autofs4_dir_unlink
,
61 .symlink
= autofs4_dir_symlink
,
62 .mkdir
= autofs4_dir_mkdir
,
63 .rmdir
= autofs4_dir_rmdir
,
66 static int autofs4_root_readdir(struct file
*file
, void *dirent
,
69 struct autofs_sb_info
*sbi
= autofs4_sbi(file
->f_dentry
->d_sb
);
70 int oz_mode
= autofs4_oz_mode(sbi
);
72 DPRINTK("called, filp->f_pos = %lld", file
->f_pos
);
75 * Don't set reghost flag if:
76 * 1) f_pos is larger than zero -- we've already been here.
77 * 2) we haven't even enabled reghosting in the 1st place.
78 * 3) this is the daemon doing a readdir
80 if (oz_mode
&& file
->f_pos
== 0 && sbi
->reghost_enabled
)
81 sbi
->needs_reghost
= 1;
83 DPRINTK("needs_reghost = %d", sbi
->needs_reghost
);
85 return autofs4_dcache_readdir(file
, dirent
, filldir
);
88 /* Update usage from here to top of tree, so that scan of
89 top-level directories will give a useful result */
90 static void autofs4_update_usage(struct vfsmount
*mnt
, struct dentry
*dentry
)
92 struct dentry
*top
= dentry
->d_sb
->s_root
;
94 spin_lock(&dcache_lock
);
95 for(; dentry
!= top
; dentry
= dentry
->d_parent
) {
96 struct autofs_info
*ino
= autofs4_dentry_ino(dentry
);
99 touch_atime(mnt
, dentry
);
100 ino
->last_used
= jiffies
;
103 spin_unlock(&dcache_lock
);
107 * From 2.4 kernel readdir.c
109 static int autofs4_dcache_readdir(struct file
* filp
, void * dirent
, filldir_t filldir
)
112 struct dentry
*dentry
= filp
->f_dentry
;
117 if (filldir(dirent
, ".", 1, i
, dentry
->d_inode
->i_ino
, DT_DIR
) < 0)
123 if (filldir(dirent
, "..", 2, i
, dentry
->d_parent
->d_inode
->i_ino
, DT_DIR
) < 0)
129 struct list_head
*list
;
132 spin_lock(&dcache_lock
);
133 list
= dentry
->d_subdirs
.next
;
136 if (list
== &dentry
->d_subdirs
) {
137 spin_unlock(&dcache_lock
);
147 struct dentry
*de
= list_entry(list
,
148 struct dentry
, d_u
.d_child
);
150 if (!d_unhashed(de
) && de
->d_inode
) {
151 spin_unlock(&dcache_lock
);
152 if (filldir(dirent
, de
->d_name
.name
, de
->d_name
.len
, filp
->f_pos
, de
->d_inode
->i_ino
, DT_UNKNOWN
) < 0)
154 spin_lock(&dcache_lock
);
158 if (list
!= &dentry
->d_subdirs
)
160 spin_unlock(&dcache_lock
);
168 static int autofs4_dir_open(struct inode
*inode
, struct file
*file
)
170 struct dentry
*dentry
= file
->f_dentry
;
171 struct vfsmount
*mnt
= file
->f_vfsmnt
;
172 struct autofs_sb_info
*sbi
= autofs4_sbi(dentry
->d_sb
);
175 DPRINTK("file=%p dentry=%p %.*s",
176 file
, dentry
, dentry
->d_name
.len
, dentry
->d_name
.name
);
178 if (autofs4_oz_mode(sbi
))
181 if (autofs4_ispending(dentry
)) {
182 DPRINTK("dentry busy");
186 if (!d_mountpoint(dentry
) && dentry
->d_op
&& dentry
->d_op
->d_revalidate
) {
190 /* In case there are stale directory dentrys from a failed mount */
191 spin_lock(&dcache_lock
);
192 empty
= list_empty(&dentry
->d_subdirs
);
193 spin_unlock(&dcache_lock
);
196 d_invalidate(dentry
);
200 nd
.flags
= LOOKUP_DIRECTORY
;
201 status
= (dentry
->d_op
->d_revalidate
)(dentry
, &nd
);
207 if (d_mountpoint(dentry
)) {
208 struct file
*fp
= NULL
;
209 struct vfsmount
*fp_mnt
= mntget(mnt
);
210 struct dentry
*fp_dentry
= dget(dentry
);
212 if (!autofs4_follow_mount(&fp_mnt
, &fp_dentry
)) {
218 fp
= dentry_open(fp_dentry
, fp_mnt
, file
->f_flags
);
219 status
= PTR_ERR(fp
);
221 file
->private_data
= NULL
;
224 file
->private_data
= fp
;
230 static int autofs4_dir_close(struct inode
*inode
, struct file
*file
)
232 struct dentry
*dentry
= file
->f_dentry
;
233 struct autofs_sb_info
*sbi
= autofs4_sbi(dentry
->d_sb
);
235 DPRINTK("file=%p dentry=%p %.*s",
236 file
, dentry
, dentry
->d_name
.len
, dentry
->d_name
.name
);
238 if (autofs4_oz_mode(sbi
))
241 if (autofs4_ispending(dentry
)) {
242 DPRINTK("dentry busy");
246 if (d_mountpoint(dentry
)) {
247 struct file
*fp
= file
->private_data
;
252 filp_close(fp
, current
->files
);
253 file
->private_data
= NULL
;
259 static int autofs4_dir_readdir(struct file
*file
, void *dirent
, filldir_t filldir
)
261 struct dentry
*dentry
= file
->f_dentry
;
262 struct autofs_sb_info
*sbi
= autofs4_sbi(dentry
->d_sb
);
265 DPRINTK("file=%p dentry=%p %.*s",
266 file
, dentry
, dentry
->d_name
.len
, dentry
->d_name
.name
);
268 if (autofs4_oz_mode(sbi
))
271 if (autofs4_ispending(dentry
)) {
272 DPRINTK("dentry busy");
276 if (d_mountpoint(dentry
)) {
277 struct file
*fp
= file
->private_data
;
282 if (!fp
->f_op
|| !fp
->f_op
->readdir
)
285 status
= vfs_readdir(fp
, filldir
, dirent
);
286 file
->f_pos
= fp
->f_pos
;
288 autofs4_copy_atime(file
, fp
);
292 return autofs4_dcache_readdir(file
, dirent
, filldir
);
295 static int try_to_fill_dentry(struct vfsmount
*mnt
, struct dentry
*dentry
, int flags
)
297 struct super_block
*sb
= mnt
->mnt_sb
;
298 struct autofs_sb_info
*sbi
= autofs4_sbi(sb
);
299 struct autofs_info
*ino
= autofs4_dentry_ino(dentry
);
302 /* Block on any pending expiry here; invalidate the dentry
303 when expiration is done to trigger mount request with a new
305 if (ino
&& (ino
->flags
& AUTOFS_INF_EXPIRING
)) {
306 DPRINTK("waiting for expire %p name=%.*s",
307 dentry
, dentry
->d_name
.len
, dentry
->d_name
.name
);
309 status
= autofs4_wait(sbi
, dentry
, NFY_NONE
);
311 DPRINTK("expire done status=%d", status
);
314 * If the directory still exists the mount request must
315 * continue otherwise it can't be followed at the right
316 * time during the walk.
318 status
= d_invalidate(dentry
);
319 if (status
!= -EBUSY
)
323 DPRINTK("dentry=%p %.*s ino=%p",
324 dentry
, dentry
->d_name
.len
, dentry
->d_name
.name
, dentry
->d_inode
);
327 * Wait for a pending mount, triggering one if there
330 if (dentry
->d_inode
== NULL
) {
331 DPRINTK("waiting for mount name=%.*s",
332 dentry
->d_name
.len
, dentry
->d_name
.name
);
334 status
= autofs4_wait(sbi
, dentry
, NFY_MOUNT
);
336 DPRINTK("mount done status=%d", status
);
338 if (status
&& dentry
->d_inode
)
339 return 0; /* Try to get the kernel to invalidate this dentry */
341 /* Turn this into a real negative dentry? */
342 if (status
== -ENOENT
) {
343 dentry
->d_time
= jiffies
+ AUTOFS_NEGATIVE_TIMEOUT
;
344 spin_lock(&dentry
->d_lock
);
345 dentry
->d_flags
&= ~DCACHE_AUTOFS_PENDING
;
346 spin_unlock(&dentry
->d_lock
);
349 /* Return a negative dentry, but leave it "pending" */
352 /* Trigger mount for path component or follow link */
353 } else if (flags
& (LOOKUP_CONTINUE
| LOOKUP_DIRECTORY
) ||
354 current
->link_count
) {
355 DPRINTK("waiting for mount name=%.*s",
356 dentry
->d_name
.len
, dentry
->d_name
.name
);
358 spin_lock(&dentry
->d_lock
);
359 dentry
->d_flags
|= DCACHE_AUTOFS_PENDING
;
360 spin_unlock(&dentry
->d_lock
);
361 status
= autofs4_wait(sbi
, dentry
, NFY_MOUNT
);
363 DPRINTK("mount done status=%d", status
);
366 spin_lock(&dentry
->d_lock
);
367 dentry
->d_flags
&= ~DCACHE_AUTOFS_PENDING
;
368 spin_unlock(&dentry
->d_lock
);
374 * We don't update the usages for the autofs daemon itself, this
375 * is necessary for recursive autofs mounts
377 if (!autofs4_oz_mode(sbi
))
378 autofs4_update_usage(mnt
, dentry
);
380 spin_lock(&dentry
->d_lock
);
381 dentry
->d_flags
&= ~DCACHE_AUTOFS_PENDING
;
382 spin_unlock(&dentry
->d_lock
);
387 * Revalidate is called on every cache lookup. Some of those
388 * cache lookups may actually happen while the dentry is not
389 * yet completely filled in, and revalidate has to delay such
392 static int autofs4_revalidate(struct dentry
*dentry
, struct nameidata
*nd
)
394 struct inode
*dir
= dentry
->d_parent
->d_inode
;
395 struct autofs_sb_info
*sbi
= autofs4_sbi(dir
->i_sb
);
396 int oz_mode
= autofs4_oz_mode(sbi
);
397 int flags
= nd
? nd
->flags
: 0;
401 if (autofs4_ispending(dentry
)) {
403 status
= try_to_fill_dentry(nd
->mnt
, dentry
, flags
);
407 /* Negative dentry.. invalidate if "old" */
408 if (dentry
->d_inode
== NULL
)
409 return (dentry
->d_time
- jiffies
<= AUTOFS_NEGATIVE_TIMEOUT
);
411 /* Check for a non-mountpoint directory with no contents */
412 spin_lock(&dcache_lock
);
413 if (S_ISDIR(dentry
->d_inode
->i_mode
) &&
414 !d_mountpoint(dentry
) &&
415 list_empty(&dentry
->d_subdirs
)) {
416 DPRINTK("dentry=%p %.*s, emptydir",
417 dentry
, dentry
->d_name
.len
, dentry
->d_name
.name
);
418 spin_unlock(&dcache_lock
);
420 status
= try_to_fill_dentry(nd
->mnt
, dentry
, flags
);
423 spin_unlock(&dcache_lock
);
425 /* Update the usage list */
427 autofs4_update_usage(nd
->mnt
, dentry
);
432 static void autofs4_dentry_release(struct dentry
*de
)
434 struct autofs_info
*inf
;
436 DPRINTK("releasing %p", de
);
438 inf
= autofs4_dentry_ino(de
);
445 autofs4_free_ino(inf
);
449 /* For dentries of directories in the root dir */
450 static struct dentry_operations autofs4_root_dentry_operations
= {
451 .d_revalidate
= autofs4_revalidate
,
452 .d_release
= autofs4_dentry_release
,
455 /* For other dentries */
456 static struct dentry_operations autofs4_dentry_operations
= {
457 .d_revalidate
= autofs4_revalidate
,
458 .d_release
= autofs4_dentry_release
,
461 /* Lookups in the root directory */
462 static struct dentry
*autofs4_lookup(struct inode
*dir
, struct dentry
*dentry
, struct nameidata
*nd
)
464 struct autofs_sb_info
*sbi
;
467 DPRINTK("name = %.*s",
468 dentry
->d_name
.len
, dentry
->d_name
.name
);
470 /* File name too long to exist */
471 if (dentry
->d_name
.len
> NAME_MAX
)
472 return ERR_PTR(-ENAMETOOLONG
);
474 sbi
= autofs4_sbi(dir
->i_sb
);
475 oz_mode
= autofs4_oz_mode(sbi
);
477 DPRINTK("pid = %u, pgrp = %u, catatonic = %d, oz_mode = %d",
478 current
->pid
, process_group(current
), sbi
->catatonic
, oz_mode
);
481 * Mark the dentry incomplete, but add it. This is needed so
482 * that the VFS layer knows about the dentry, and we can count
483 * on catching any lookups through the revalidate.
485 * Let all the hard work be done by the revalidate function that
486 * needs to be able to do this anyway..
488 * We need to do this before we release the directory semaphore.
490 dentry
->d_op
= &autofs4_root_dentry_operations
;
493 spin_lock(&dentry
->d_lock
);
494 dentry
->d_flags
|= DCACHE_AUTOFS_PENDING
;
495 spin_unlock(&dentry
->d_lock
);
497 dentry
->d_fsdata
= NULL
;
500 if (dentry
->d_op
&& dentry
->d_op
->d_revalidate
) {
501 mutex_unlock(&dir
->i_mutex
);
502 (dentry
->d_op
->d_revalidate
)(dentry
, nd
);
503 mutex_lock(&dir
->i_mutex
);
507 * If we are still pending, check if we had to handle
508 * a signal. If so we can force a restart..
510 if (dentry
->d_flags
& DCACHE_AUTOFS_PENDING
) {
511 /* See if we were interrupted */
512 if (signal_pending(current
)) {
513 sigset_t
*sigset
= ¤t
->pending
.signal
;
514 if (sigismember (sigset
, SIGKILL
) ||
515 sigismember (sigset
, SIGQUIT
) ||
516 sigismember (sigset
, SIGINT
)) {
517 return ERR_PTR(-ERESTARTNOINTR
);
523 * If this dentry is unhashed, then we shouldn't honour this
524 * lookup even if the dentry is positive. Returning ENOENT here
525 * doesn't do the right thing for all system calls, but it should
526 * be OK for the operations we permit from an autofs.
528 if (dentry
->d_inode
&& d_unhashed(dentry
))
529 return ERR_PTR(-ENOENT
);
534 static int autofs4_dir_symlink(struct inode
*dir
,
535 struct dentry
*dentry
,
538 struct autofs_sb_info
*sbi
= autofs4_sbi(dir
->i_sb
);
539 struct autofs_info
*ino
= autofs4_dentry_ino(dentry
);
543 DPRINTK("%s <- %.*s", symname
,
544 dentry
->d_name
.len
, dentry
->d_name
.name
);
546 if (!autofs4_oz_mode(sbi
))
549 ino
= autofs4_init_ino(ino
, sbi
, S_IFLNK
| 0555);
553 ino
->size
= strlen(symname
);
554 ino
->u
.symlink
= cp
= kmalloc(ino
->size
+ 1, GFP_KERNEL
);
563 inode
= autofs4_get_inode(dir
->i_sb
, ino
);
564 d_instantiate(dentry
, inode
);
566 if (dir
== dir
->i_sb
->s_root
->d_inode
)
567 dentry
->d_op
= &autofs4_root_dentry_operations
;
569 dentry
->d_op
= &autofs4_dentry_operations
;
571 dentry
->d_fsdata
= ino
;
572 ino
->dentry
= dget(dentry
);
575 dir
->i_mtime
= CURRENT_TIME
;
583 * Normal filesystems would do a "d_delete()" to tell the VFS dcache
584 * that the file no longer exists. However, doing that means that the
585 * VFS layer can turn the dentry into a negative dentry. We don't want
586 * this, because since the unlink is probably the result of an expire.
587 * We simply d_drop it, which allows the dentry lookup to remount it
590 * If a process is blocked on the dentry waiting for the expire to finish,
591 * it will invalidate the dentry and try to mount with a new one.
593 * Also see autofs4_dir_rmdir()..
595 static int autofs4_dir_unlink(struct inode
*dir
, struct dentry
*dentry
)
597 struct autofs_sb_info
*sbi
= autofs4_sbi(dir
->i_sb
);
598 struct autofs_info
*ino
= autofs4_dentry_ino(dentry
);
600 /* This allows root to remove symlinks */
601 if ( !autofs4_oz_mode(sbi
) && !capable(CAP_SYS_ADMIN
) )
606 dentry
->d_inode
->i_size
= 0;
607 dentry
->d_inode
->i_nlink
= 0;
609 dir
->i_mtime
= CURRENT_TIME
;
616 static int autofs4_dir_rmdir(struct inode
*dir
, struct dentry
*dentry
)
618 struct autofs_sb_info
*sbi
= autofs4_sbi(dir
->i_sb
);
619 struct autofs_info
*ino
= autofs4_dentry_ino(dentry
);
621 if (!autofs4_oz_mode(sbi
))
624 spin_lock(&dcache_lock
);
625 if (!list_empty(&dentry
->d_subdirs
)) {
626 spin_unlock(&dcache_lock
);
629 spin_lock(&dentry
->d_lock
);
631 spin_unlock(&dentry
->d_lock
);
632 spin_unlock(&dcache_lock
);
636 dentry
->d_inode
->i_size
= 0;
637 dentry
->d_inode
->i_nlink
= 0;
645 static int autofs4_dir_mkdir(struct inode
*dir
, struct dentry
*dentry
, int mode
)
647 struct autofs_sb_info
*sbi
= autofs4_sbi(dir
->i_sb
);
648 struct autofs_info
*ino
= autofs4_dentry_ino(dentry
);
651 if ( !autofs4_oz_mode(sbi
) )
654 DPRINTK("dentry %p, creating %.*s",
655 dentry
, dentry
->d_name
.len
, dentry
->d_name
.name
);
657 ino
= autofs4_init_ino(ino
, sbi
, S_IFDIR
| 0555);
661 inode
= autofs4_get_inode(dir
->i_sb
, ino
);
662 d_instantiate(dentry
, inode
);
664 if (dir
== dir
->i_sb
->s_root
->d_inode
)
665 dentry
->d_op
= &autofs4_root_dentry_operations
;
667 dentry
->d_op
= &autofs4_dentry_operations
;
669 dentry
->d_fsdata
= ino
;
670 ino
->dentry
= dget(dentry
);
673 dir
->i_mtime
= CURRENT_TIME
;
678 /* Get/set timeout ioctl() operation */
679 static inline int autofs4_get_set_timeout(struct autofs_sb_info
*sbi
,
680 unsigned long __user
*p
)
683 unsigned long ntimeout
;
685 if ( (rv
= get_user(ntimeout
, p
)) ||
686 (rv
= put_user(sbi
->exp_timeout
/HZ
, p
)) )
689 if ( ntimeout
> ULONG_MAX
/HZ
)
690 sbi
->exp_timeout
= 0;
692 sbi
->exp_timeout
= ntimeout
* HZ
;
697 /* Return protocol version */
698 static inline int autofs4_get_protover(struct autofs_sb_info
*sbi
, int __user
*p
)
700 return put_user(sbi
->version
, p
);
703 /* Return protocol sub version */
704 static inline int autofs4_get_protosubver(struct autofs_sb_info
*sbi
, int __user
*p
)
706 return put_user(sbi
->sub_version
, p
);
710 * Tells the daemon whether we need to reghost or not. Also, clears
711 * the reghost_needed flag.
713 static inline int autofs4_ask_reghost(struct autofs_sb_info
*sbi
, int __user
*p
)
717 DPRINTK("returning %d", sbi
->needs_reghost
);
719 status
= put_user(sbi
->needs_reghost
, p
);
723 sbi
->needs_reghost
= 0;
728 * Enable / Disable reghosting ioctl() operation
730 static inline int autofs4_toggle_reghost(struct autofs_sb_info
*sbi
, int __user
*p
)
735 status
= get_user(val
, p
);
737 DPRINTK("reghost = %d", val
);
742 /* turn on/off reghosting, with the val */
743 sbi
->reghost_enabled
= val
;
748 * Tells the daemon whether it can umount the autofs mount.
750 static inline int autofs4_ask_umount(struct vfsmount
*mnt
, int __user
*p
)
754 if (may_umount(mnt
) == 0)
757 DPRINTK("returning %d", status
);
759 status
= put_user(status
, p
);
764 /* Identify autofs4_dentries - this is so we can tell if there's
765 an extra dentry refcount or not. We only hold a refcount on the
766 dentry if its non-negative (ie, d_inode != NULL)
768 int is_autofs4_dentry(struct dentry
*dentry
)
770 return dentry
&& dentry
->d_inode
&&
771 (dentry
->d_op
== &autofs4_root_dentry_operations
||
772 dentry
->d_op
== &autofs4_dentry_operations
) &&
773 dentry
->d_fsdata
!= NULL
;
777 * ioctl()'s on the root directory is the chief method for the daemon to
778 * generate kernel reactions
780 static int autofs4_root_ioctl(struct inode
*inode
, struct file
*filp
,
781 unsigned int cmd
, unsigned long arg
)
783 struct autofs_sb_info
*sbi
= autofs4_sbi(inode
->i_sb
);
784 void __user
*p
= (void __user
*)arg
;
786 DPRINTK("cmd = 0x%08x, arg = 0x%08lx, sbi = %p, pgrp = %u",
787 cmd
,arg
,sbi
,process_group(current
));
789 if ( _IOC_TYPE(cmd
) != _IOC_TYPE(AUTOFS_IOC_FIRST
) ||
790 _IOC_NR(cmd
) - _IOC_NR(AUTOFS_IOC_FIRST
) >= AUTOFS_IOC_COUNT
)
793 if ( !autofs4_oz_mode(sbi
) && !capable(CAP_SYS_ADMIN
) )
797 case AUTOFS_IOC_READY
: /* Wait queue: go ahead and retry */
798 return autofs4_wait_release(sbi
,(autofs_wqt_t
)arg
,0);
799 case AUTOFS_IOC_FAIL
: /* Wait queue: fail with ENOENT */
800 return autofs4_wait_release(sbi
,(autofs_wqt_t
)arg
,-ENOENT
);
801 case AUTOFS_IOC_CATATONIC
: /* Enter catatonic mode (daemon shutdown) */
802 autofs4_catatonic_mode(sbi
);
804 case AUTOFS_IOC_PROTOVER
: /* Get protocol version */
805 return autofs4_get_protover(sbi
, p
);
806 case AUTOFS_IOC_PROTOSUBVER
: /* Get protocol sub version */
807 return autofs4_get_protosubver(sbi
, p
);
808 case AUTOFS_IOC_SETTIMEOUT
:
809 return autofs4_get_set_timeout(sbi
, p
);
811 case AUTOFS_IOC_TOGGLEREGHOST
:
812 return autofs4_toggle_reghost(sbi
, p
);
813 case AUTOFS_IOC_ASKREGHOST
:
814 return autofs4_ask_reghost(sbi
, p
);
816 case AUTOFS_IOC_ASKUMOUNT
:
817 return autofs4_ask_umount(filp
->f_vfsmnt
, p
);
819 /* return a single thing to expire */
820 case AUTOFS_IOC_EXPIRE
:
821 return autofs4_expire_run(inode
->i_sb
,filp
->f_vfsmnt
,sbi
, p
);
822 /* same as above, but can send multiple expires through pipe */
823 case AUTOFS_IOC_EXPIRE_MULTI
:
824 return autofs4_expire_multi(inode
->i_sb
,filp
->f_vfsmnt
,sbi
, p
);