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 2001-2006 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/slab.h>
19 #include <linux/param.h>
20 #include <linux/time.h>
21 #include <linux/compat.h>
22 #include <linux/mutex.h>
26 DEFINE_SPINLOCK(autofs4_lock);
28 static int autofs4_dir_symlink(struct inode *,struct dentry *,const char *);
29 static int autofs4_dir_unlink(struct inode *,struct dentry *);
30 static int autofs4_dir_rmdir(struct inode *,struct dentry *);
31 static int autofs4_dir_mkdir(struct inode *,struct dentry *,int);
32 static long autofs4_root_ioctl(struct file *,unsigned int,unsigned long);
34 static long autofs4_root_compat_ioctl(struct file *,unsigned int,unsigned long);
36 static int autofs4_dir_open(struct inode *inode, struct file *file);
37 static struct dentry *autofs4_lookup(struct inode *,struct dentry *, struct nameidata *);
38 static struct vfsmount *autofs4_d_automount(struct path *);
39 static int autofs4_d_manage(struct dentry *, bool);
41 const struct file_operations autofs4_root_operations = {
42 .open = dcache_dir_open,
43 .release = dcache_dir_close,
44 .read = generic_read_dir,
45 .readdir = dcache_readdir,
46 .llseek = dcache_dir_lseek,
47 .unlocked_ioctl = autofs4_root_ioctl,
49 .compat_ioctl = autofs4_root_compat_ioctl,
53 const struct file_operations autofs4_dir_operations = {
54 .open = autofs4_dir_open,
55 .release = dcache_dir_close,
56 .read = generic_read_dir,
57 .readdir = dcache_readdir,
58 .llseek = dcache_dir_lseek,
61 const struct inode_operations autofs4_dir_inode_operations = {
62 .lookup = autofs4_lookup,
63 .unlink = autofs4_dir_unlink,
64 .symlink = autofs4_dir_symlink,
65 .mkdir = autofs4_dir_mkdir,
66 .rmdir = autofs4_dir_rmdir,
69 /* For dentries that don't initiate mounting */
70 const struct dentry_operations autofs4_dentry_operations = {
71 .d_release = autofs4_dentry_release,
74 /* For dentries that do initiate mounting */
75 const struct dentry_operations autofs4_mount_dentry_operations = {
76 .d_automount = autofs4_d_automount,
77 .d_manage = autofs4_d_manage,
78 .d_release = autofs4_dentry_release,
81 static void autofs4_add_active(struct dentry *dentry)
83 struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb);
84 struct autofs_info *ino = autofs4_dentry_ino(dentry);
86 spin_lock(&sbi->lookup_lock);
87 if (!ino->active_count) {
88 if (list_empty(&ino->active))
89 list_add(&ino->active, &sbi->active_list);
92 spin_unlock(&sbi->lookup_lock);
97 static void autofs4_del_active(struct dentry *dentry)
99 struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb);
100 struct autofs_info *ino = autofs4_dentry_ino(dentry);
102 spin_lock(&sbi->lookup_lock);
104 if (!ino->active_count) {
105 if (!list_empty(&ino->active))
106 list_del_init(&ino->active);
108 spin_unlock(&sbi->lookup_lock);
113 static int autofs4_dir_open(struct inode *inode, struct file *file)
115 struct dentry *dentry = file->f_path.dentry;
116 struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb);
118 DPRINTK("file=%p dentry=%p %.*s",
119 file, dentry, dentry->d_name.len, dentry->d_name.name);
121 if (autofs4_oz_mode(sbi))
125 * An empty directory in an autofs file system is always a
126 * mount point. The daemon must have failed to mount this
127 * during lookup so it doesn't exist. This can happen, for
128 * example, if user space returns an incorrect status for a
129 * mount request. Otherwise we're doing a readdir on the
130 * autofs file system so just let the libfs routines handle
133 spin_lock(&autofs4_lock);
134 spin_lock(&dentry->d_lock);
135 if (!d_mountpoint(dentry) && list_empty(&dentry->d_subdirs)) {
136 spin_unlock(&dentry->d_lock);
137 spin_unlock(&autofs4_lock);
140 spin_unlock(&dentry->d_lock);
141 spin_unlock(&autofs4_lock);
144 return dcache_dir_open(inode, file);
147 void autofs4_dentry_release(struct dentry *de)
149 struct autofs_info *inf;
151 DPRINTK("releasing %p", de);
153 inf = autofs4_dentry_ino(de);
157 struct autofs_sb_info *sbi = autofs4_sbi(de->d_sb);
160 spin_lock(&sbi->lookup_lock);
161 if (!list_empty(&inf->active))
162 list_del(&inf->active);
163 if (!list_empty(&inf->expiring))
164 list_del(&inf->expiring);
165 spin_unlock(&sbi->lookup_lock);
171 autofs4_free_ino(inf);
175 static struct dentry *autofs4_lookup_active(struct dentry *dentry)
177 struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb);
178 struct dentry *parent = dentry->d_parent;
179 struct qstr *name = &dentry->d_name;
180 unsigned int len = name->len;
181 unsigned int hash = name->hash;
182 const unsigned char *str = name->name;
183 struct list_head *p, *head;
185 spin_lock(&autofs4_lock);
186 spin_lock(&sbi->lookup_lock);
187 head = &sbi->active_list;
188 list_for_each(p, head) {
189 struct autofs_info *ino;
190 struct dentry *active;
193 ino = list_entry(p, struct autofs_info, active);
194 active = ino->dentry;
196 spin_lock(&active->d_lock);
199 if (active->d_count == 0)
202 qstr = &active->d_name;
204 if (active->d_name.hash != hash)
206 if (active->d_parent != parent)
209 if (qstr->len != len)
211 if (memcmp(qstr->name, str, len))
214 if (d_unhashed(active)) {
216 spin_unlock(&active->d_lock);
217 spin_unlock(&sbi->lookup_lock);
218 spin_unlock(&autofs4_lock);
222 spin_unlock(&active->d_lock);
224 spin_unlock(&sbi->lookup_lock);
225 spin_unlock(&autofs4_lock);
230 static struct dentry *autofs4_lookup_expiring(struct dentry *dentry)
232 struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb);
233 struct dentry *parent = dentry->d_parent;
234 struct qstr *name = &dentry->d_name;
235 unsigned int len = name->len;
236 unsigned int hash = name->hash;
237 const unsigned char *str = name->name;
238 struct list_head *p, *head;
240 spin_lock(&autofs4_lock);
241 spin_lock(&sbi->lookup_lock);
242 head = &sbi->expiring_list;
243 list_for_each(p, head) {
244 struct autofs_info *ino;
245 struct dentry *expiring;
248 ino = list_entry(p, struct autofs_info, expiring);
249 expiring = ino->dentry;
251 spin_lock(&expiring->d_lock);
253 /* Bad luck, we've already been dentry_iput */
254 if (!expiring->d_inode)
257 qstr = &expiring->d_name;
259 if (expiring->d_name.hash != hash)
261 if (expiring->d_parent != parent)
264 if (qstr->len != len)
266 if (memcmp(qstr->name, str, len))
269 if (d_unhashed(expiring)) {
270 dget_dlock(expiring);
271 spin_unlock(&expiring->d_lock);
272 spin_unlock(&sbi->lookup_lock);
273 spin_unlock(&autofs4_lock);
277 spin_unlock(&expiring->d_lock);
279 spin_unlock(&sbi->lookup_lock);
280 spin_unlock(&autofs4_lock);
285 static int autofs4_mount_wait(struct dentry *dentry)
287 struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb);
288 struct autofs_info *ino = autofs4_dentry_ino(dentry);
291 if (ino->flags & AUTOFS_INF_PENDING) {
292 DPRINTK("waiting for mount name=%.*s",
293 dentry->d_name.len, dentry->d_name.name);
294 status = autofs4_wait(sbi, dentry, NFY_MOUNT);
295 DPRINTK("mount wait done status=%d", status);
296 ino->last_used = jiffies;
302 static int do_expire_wait(struct dentry *dentry)
304 struct dentry *expiring;
306 expiring = autofs4_lookup_expiring(dentry);
308 return autofs4_expire_wait(dentry);
311 * If we are racing with expire the request might not
312 * be quite complete, but the directory has been removed
313 * so it must have been successful, just wait for it.
315 autofs4_expire_wait(expiring);
316 autofs4_del_expiring(expiring);
322 static struct dentry *autofs4_mountpoint_changed(struct path *path)
324 struct dentry *dentry = path->dentry;
325 struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb);
328 * If this is an indirect mount the dentry could have gone away
329 * as a result of an expire and a new one created.
331 if (autofs_type_indirect(sbi->type) && d_unhashed(dentry)) {
332 struct dentry *parent = dentry->d_parent;
333 struct dentry *new = d_lookup(parent, &dentry->d_name);
342 static struct vfsmount *autofs4_d_automount(struct path *path)
344 struct dentry *dentry = path->dentry;
345 struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb);
346 struct autofs_info *ino = autofs4_dentry_ino(dentry);
349 DPRINTK("dentry=%p %.*s",
350 dentry, dentry->d_name.len, dentry->d_name.name);
353 * Someone may have manually umounted this or it was a submount
354 * that has gone away.
356 spin_lock(&dentry->d_lock);
357 if (!d_mountpoint(dentry) && list_empty(&dentry->d_subdirs)) {
358 if (!(dentry->d_flags & DCACHE_MANAGE_TRANSIT) &&
359 (dentry->d_flags & DCACHE_NEED_AUTOMOUNT))
360 __managed_dentry_set_transit(path->dentry);
362 spin_unlock(&dentry->d_lock);
364 /* The daemon never triggers a mount. */
365 if (autofs4_oz_mode(sbi))
369 * If an expire request is pending everyone must wait.
370 * If the expire fails we're still mounted so continue
371 * the follow and return. A return of -EAGAIN (which only
372 * happens with indirect mounts) means the expire completed
373 * and the directory was removed, so just go ahead and try
376 status = do_expire_wait(dentry);
377 if (status && status != -EAGAIN)
380 /* Callback to the daemon to perform the mount or wait */
381 spin_lock(&sbi->fs_lock);
382 if (ino->flags & AUTOFS_INF_PENDING) {
383 spin_unlock(&sbi->fs_lock);
384 status = autofs4_mount_wait(dentry);
386 return ERR_PTR(status);
387 spin_lock(&sbi->fs_lock);
392 * If the dentry is a symlink it's equivalent to a directory
393 * having d_mountpoint() true, so there's no need to call back
396 if (dentry->d_inode && S_ISLNK(dentry->d_inode->i_mode))
398 if (!d_mountpoint(dentry)) {
400 * It's possible that user space hasn't removed directories
401 * after umounting a rootless multi-mount, although it
402 * should. For v5 have_submounts() is sufficient to handle
403 * this because the leaves of the directory tree under the
404 * mount never trigger mounts themselves (they have an autofs
405 * trigger mount mounted on them). But v4 pseudo direct mounts
406 * do need the leaves to to trigger mounts. In this case we
407 * have no choice but to use the list_empty() check and
408 * require user space behave.
410 if (sbi->version > 4) {
411 if (have_submounts(dentry))
414 spin_lock(&dentry->d_lock);
415 if (!list_empty(&dentry->d_subdirs)) {
416 spin_unlock(&dentry->d_lock);
419 spin_unlock(&dentry->d_lock);
421 ino->flags |= AUTOFS_INF_PENDING;
422 spin_unlock(&sbi->fs_lock);
423 status = autofs4_mount_wait(dentry);
425 return ERR_PTR(status);
426 spin_lock(&sbi->fs_lock);
427 ino->flags &= ~AUTOFS_INF_PENDING;
430 if (!(ino->flags & AUTOFS_INF_EXPIRING)) {
432 * Any needed mounting has been completed and the path updated
433 * so turn this into a normal dentry so we don't continually
434 * call ->d_automount() and ->d_manage().
436 spin_lock(&dentry->d_lock);
437 __managed_dentry_clear_transit(dentry);
439 * Only clear DMANAGED_AUTOMOUNT for rootless multi-mounts and
440 * symlinks as in all other cases the dentry will be covered by
441 * an actual mount so ->d_automount() won't be called during
444 if ((!d_mountpoint(dentry) &&
445 !list_empty(&dentry->d_subdirs)) ||
446 (dentry->d_inode && S_ISLNK(dentry->d_inode->i_mode)))
447 __managed_dentry_clear_automount(dentry);
448 spin_unlock(&dentry->d_lock);
450 spin_unlock(&sbi->fs_lock);
452 /* Mount succeeded, check if we ended up with a new dentry */
453 dentry = autofs4_mountpoint_changed(path);
455 return ERR_PTR(-ENOENT);
460 int autofs4_d_manage(struct dentry *dentry, bool mounting_here)
462 struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb);
464 DPRINTK("dentry=%p %.*s",
465 dentry, dentry->d_name.len, dentry->d_name.name);
467 /* The daemon never waits. */
468 if (autofs4_oz_mode(sbi) || mounting_here) {
469 if (!d_mountpoint(dentry))
474 /* Wait for pending expires */
475 do_expire_wait(dentry);
478 * This dentry may be under construction so wait on mount
481 return autofs4_mount_wait(dentry);
484 /* Lookups in the root directory */
485 static struct dentry *autofs4_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
487 struct autofs_sb_info *sbi;
488 struct autofs_info *ino;
489 struct dentry *active;
491 DPRINTK("name = %.*s", dentry->d_name.len, dentry->d_name.name);
493 /* File name too long to exist */
494 if (dentry->d_name.len > NAME_MAX)
495 return ERR_PTR(-ENAMETOOLONG);
497 sbi = autofs4_sbi(dir->i_sb);
499 DPRINTK("pid = %u, pgrp = %u, catatonic = %d, oz_mode = %d",
500 current->pid, task_pgrp_nr(current), sbi->catatonic, oz_mode);
502 active = autofs4_lookup_active(dentry);
506 d_set_d_op(dentry, &autofs4_dentry_operations);
509 * A dentry that is not within the root can never trigger a
510 * mount operation, unless the directory already exists, so we
511 * can return fail immediately. The daemon however does need
512 * to create directories within the file system.
514 if (!autofs4_oz_mode(sbi) && !IS_ROOT(dentry->d_parent))
515 return ERR_PTR(-ENOENT);
517 /* Mark entries in the root as mount triggers */
518 if (autofs_type_indirect(sbi->type) && IS_ROOT(dentry->d_parent)) {
519 d_set_d_op(dentry, &autofs4_mount_dentry_operations);
520 __managed_dentry_set_managed(dentry);
523 ino = autofs4_init_ino(NULL, sbi, 0555);
525 return ERR_PTR(-ENOMEM);
527 dentry->d_fsdata = ino;
528 ino->dentry = dentry;
530 autofs4_add_active(dentry);
532 d_instantiate(dentry, NULL);
537 static int autofs4_dir_symlink(struct inode *dir,
538 struct dentry *dentry,
541 struct autofs_sb_info *sbi = autofs4_sbi(dir->i_sb);
542 struct autofs_info *ino = autofs4_dentry_ino(dentry);
543 struct autofs_info *p_ino;
547 DPRINTK("%s <- %.*s", symname,
548 dentry->d_name.len, dentry->d_name.name);
550 if (!autofs4_oz_mode(sbi))
553 ino = autofs4_init_ino(ino, sbi, S_IFLNK | 0555);
557 autofs4_del_active(dentry);
559 ino->size = strlen(symname);
560 cp = kmalloc(ino->size + 1, GFP_KERNEL);
562 if (!dentry->d_fsdata)
569 inode = autofs4_get_inode(dir->i_sb, ino);
572 if (!dentry->d_fsdata)
576 d_add(dentry, inode);
578 d_set_d_op(dentry, &autofs4_dentry_operations);
580 dentry->d_fsdata = ino;
581 ino->dentry = dget(dentry);
582 atomic_inc(&ino->count);
583 p_ino = autofs4_dentry_ino(dentry->d_parent);
584 if (p_ino && dentry->d_parent != dentry)
585 atomic_inc(&p_ino->count);
589 dir->i_mtime = CURRENT_TIME;
597 * Normal filesystems would do a "d_delete()" to tell the VFS dcache
598 * that the file no longer exists. However, doing that means that the
599 * VFS layer can turn the dentry into a negative dentry. We don't want
600 * this, because the unlink is probably the result of an expire.
601 * We simply d_drop it and add it to a expiring list in the super block,
602 * which allows the dentry lookup to check for an incomplete expire.
604 * If a process is blocked on the dentry waiting for the expire to finish,
605 * it will invalidate the dentry and try to mount with a new one.
607 * Also see autofs4_dir_rmdir()..
609 static int autofs4_dir_unlink(struct inode *dir, struct dentry *dentry)
611 struct autofs_sb_info *sbi = autofs4_sbi(dir->i_sb);
612 struct autofs_info *ino = autofs4_dentry_ino(dentry);
613 struct autofs_info *p_ino;
615 /* This allows root to remove symlinks */
616 if (!autofs4_oz_mode(sbi) && !capable(CAP_SYS_ADMIN))
619 if (atomic_dec_and_test(&ino->count)) {
620 p_ino = autofs4_dentry_ino(dentry->d_parent);
621 if (p_ino && dentry->d_parent != dentry)
622 atomic_dec(&p_ino->count);
626 dentry->d_inode->i_size = 0;
627 clear_nlink(dentry->d_inode);
629 dir->i_mtime = CURRENT_TIME;
631 spin_lock(&autofs4_lock);
632 autofs4_add_expiring(dentry);
633 spin_lock(&dentry->d_lock);
635 spin_unlock(&dentry->d_lock);
636 spin_unlock(&autofs4_lock);
641 static int autofs4_dir_rmdir(struct inode *dir, struct dentry *dentry)
643 struct autofs_sb_info *sbi = autofs4_sbi(dir->i_sb);
644 struct autofs_info *ino = autofs4_dentry_ino(dentry);
645 struct autofs_info *p_ino;
647 DPRINTK("dentry %p, removing %.*s",
648 dentry, dentry->d_name.len, dentry->d_name.name);
650 if (!autofs4_oz_mode(sbi))
653 spin_lock(&autofs4_lock);
654 spin_lock(&sbi->lookup_lock);
655 spin_lock(&dentry->d_lock);
656 if (!list_empty(&dentry->d_subdirs)) {
657 spin_unlock(&dentry->d_lock);
658 spin_unlock(&sbi->lookup_lock);
659 spin_unlock(&autofs4_lock);
662 __autofs4_add_expiring(dentry);
663 spin_unlock(&sbi->lookup_lock);
665 spin_unlock(&dentry->d_lock);
666 spin_unlock(&autofs4_lock);
668 if (atomic_dec_and_test(&ino->count)) {
669 p_ino = autofs4_dentry_ino(dentry->d_parent);
670 if (p_ino && dentry->d_parent != dentry)
671 atomic_dec(&p_ino->count);
674 dentry->d_inode->i_size = 0;
675 clear_nlink(dentry->d_inode);
683 static int autofs4_dir_mkdir(struct inode *dir, struct dentry *dentry, int mode)
685 struct autofs_sb_info *sbi = autofs4_sbi(dir->i_sb);
686 struct autofs_info *ino = autofs4_dentry_ino(dentry);
687 struct autofs_info *p_ino;
690 if (!autofs4_oz_mode(sbi))
693 DPRINTK("dentry %p, creating %.*s",
694 dentry, dentry->d_name.len, dentry->d_name.name);
696 ino = autofs4_init_ino(ino, sbi, S_IFDIR | 0555);
700 autofs4_del_active(dentry);
702 inode = autofs4_get_inode(dir->i_sb, ino);
704 if (!dentry->d_fsdata)
708 d_add(dentry, inode);
710 dentry->d_fsdata = ino;
711 ino->dentry = dget(dentry);
712 atomic_inc(&ino->count);
713 p_ino = autofs4_dentry_ino(dentry->d_parent);
714 if (p_ino && dentry->d_parent != dentry)
715 atomic_inc(&p_ino->count);
718 dir->i_mtime = CURRENT_TIME;
723 /* Get/set timeout ioctl() operation */
725 static inline int autofs4_compat_get_set_timeout(struct autofs_sb_info *sbi,
726 compat_ulong_t __user *p)
729 unsigned long ntimeout;
731 if ((rv = get_user(ntimeout, p)) ||
732 (rv = put_user(sbi->exp_timeout/HZ, p)))
735 if (ntimeout > UINT_MAX/HZ)
736 sbi->exp_timeout = 0;
738 sbi->exp_timeout = ntimeout * HZ;
744 static inline int autofs4_get_set_timeout(struct autofs_sb_info *sbi,
745 unsigned long __user *p)
748 unsigned long ntimeout;
750 if ((rv = get_user(ntimeout, p)) ||
751 (rv = put_user(sbi->exp_timeout/HZ, p)))
754 if (ntimeout > ULONG_MAX/HZ)
755 sbi->exp_timeout = 0;
757 sbi->exp_timeout = ntimeout * HZ;
762 /* Return protocol version */
763 static inline int autofs4_get_protover(struct autofs_sb_info *sbi, int __user *p)
765 return put_user(sbi->version, p);
768 /* Return protocol sub version */
769 static inline int autofs4_get_protosubver(struct autofs_sb_info *sbi, int __user *p)
771 return put_user(sbi->sub_version, p);
775 * Tells the daemon whether it can umount the autofs mount.
777 static inline int autofs4_ask_umount(struct vfsmount *mnt, int __user *p)
784 DPRINTK("returning %d", status);
786 status = put_user(status, p);
791 /* Identify autofs4_dentries - this is so we can tell if there's
792 an extra dentry refcount or not. We only hold a refcount on the
793 dentry if its non-negative (ie, d_inode != NULL)
795 int is_autofs4_dentry(struct dentry *dentry)
797 return dentry && dentry->d_inode &&
798 (dentry->d_op == &autofs4_mount_dentry_operations ||
799 dentry->d_op == &autofs4_dentry_operations) &&
800 dentry->d_fsdata != NULL;
804 * ioctl()'s on the root directory is the chief method for the daemon to
805 * generate kernel reactions
807 static int autofs4_root_ioctl_unlocked(struct inode *inode, struct file *filp,
808 unsigned int cmd, unsigned long arg)
810 struct autofs_sb_info *sbi = autofs4_sbi(inode->i_sb);
811 void __user *p = (void __user *)arg;
813 DPRINTK("cmd = 0x%08x, arg = 0x%08lx, sbi = %p, pgrp = %u",
814 cmd,arg,sbi,task_pgrp_nr(current));
816 if (_IOC_TYPE(cmd) != _IOC_TYPE(AUTOFS_IOC_FIRST) ||
817 _IOC_NR(cmd) - _IOC_NR(AUTOFS_IOC_FIRST) >= AUTOFS_IOC_COUNT)
820 if (!autofs4_oz_mode(sbi) && !capable(CAP_SYS_ADMIN))
824 case AUTOFS_IOC_READY: /* Wait queue: go ahead and retry */
825 return autofs4_wait_release(sbi,(autofs_wqt_t)arg,0);
826 case AUTOFS_IOC_FAIL: /* Wait queue: fail with ENOENT */
827 return autofs4_wait_release(sbi,(autofs_wqt_t)arg,-ENOENT);
828 case AUTOFS_IOC_CATATONIC: /* Enter catatonic mode (daemon shutdown) */
829 autofs4_catatonic_mode(sbi);
831 case AUTOFS_IOC_PROTOVER: /* Get protocol version */
832 return autofs4_get_protover(sbi, p);
833 case AUTOFS_IOC_PROTOSUBVER: /* Get protocol sub version */
834 return autofs4_get_protosubver(sbi, p);
835 case AUTOFS_IOC_SETTIMEOUT:
836 return autofs4_get_set_timeout(sbi, p);
838 case AUTOFS_IOC_SETTIMEOUT32:
839 return autofs4_compat_get_set_timeout(sbi, p);
842 case AUTOFS_IOC_ASKUMOUNT:
843 return autofs4_ask_umount(filp->f_path.mnt, p);
845 /* return a single thing to expire */
846 case AUTOFS_IOC_EXPIRE:
847 return autofs4_expire_run(inode->i_sb,filp->f_path.mnt,sbi, p);
848 /* same as above, but can send multiple expires through pipe */
849 case AUTOFS_IOC_EXPIRE_MULTI:
850 return autofs4_expire_multi(inode->i_sb,filp->f_path.mnt,sbi, p);
857 static long autofs4_root_ioctl(struct file *filp,
858 unsigned int cmd, unsigned long arg)
860 struct inode *inode = filp->f_dentry->d_inode;
861 return autofs4_root_ioctl_unlocked(inode, filp, cmd, arg);
865 static long autofs4_root_compat_ioctl(struct file *filp,
866 unsigned int cmd, unsigned long arg)
868 struct inode *inode = filp->f_path.dentry->d_inode;
871 if (cmd == AUTOFS_IOC_READY || cmd == AUTOFS_IOC_FAIL)
872 ret = autofs4_root_ioctl_unlocked(inode, filp, cmd, arg);
874 ret = autofs4_root_ioctl_unlocked(inode, filp, cmd,
875 (unsigned long)compat_ptr(arg));