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 static int autofs4_dir_symlink(struct inode *,struct dentry *,const char *);
27 static int autofs4_dir_unlink(struct inode *,struct dentry *);
28 static int autofs4_dir_rmdir(struct inode *,struct dentry *);
29 static int autofs4_dir_mkdir(struct inode *,struct dentry *,umode_t);
30 static long autofs4_root_ioctl(struct file *,unsigned int,unsigned long);
32 static long autofs4_root_compat_ioctl(struct file *,unsigned int,unsigned long);
34 static int autofs4_dir_open(struct inode *inode, struct file *file);
35 static struct dentry *autofs4_lookup(struct inode *,struct dentry *, unsigned int);
36 static struct vfsmount *autofs4_d_automount(struct path *);
37 static int autofs4_d_manage(struct dentry *, bool);
38 static void autofs4_dentry_release(struct dentry *);
40 const struct file_operations autofs4_root_operations = {
41 .open = dcache_dir_open,
42 .release = dcache_dir_close,
43 .read = generic_read_dir,
44 .iterate = dcache_readdir,
45 .llseek = dcache_dir_lseek,
46 .unlocked_ioctl = autofs4_root_ioctl,
48 .compat_ioctl = autofs4_root_compat_ioctl,
52 const struct file_operations autofs4_dir_operations = {
53 .open = autofs4_dir_open,
54 .release = dcache_dir_close,
55 .read = generic_read_dir,
56 .iterate = dcache_readdir,
57 .llseek = dcache_dir_lseek,
60 const struct inode_operations autofs4_dir_inode_operations = {
61 .lookup = autofs4_lookup,
62 .unlink = autofs4_dir_unlink,
63 .symlink = autofs4_dir_symlink,
64 .mkdir = autofs4_dir_mkdir,
65 .rmdir = autofs4_dir_rmdir,
68 const struct dentry_operations autofs4_dentry_operations = {
69 .d_automount = autofs4_d_automount,
70 .d_manage = autofs4_d_manage,
71 .d_release = autofs4_dentry_release,
74 static void autofs4_add_active(struct dentry *dentry)
76 struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb);
77 struct autofs_info *ino = autofs4_dentry_ino(dentry);
79 spin_lock(&sbi->lookup_lock);
80 if (!ino->active_count) {
81 if (list_empty(&ino->active))
82 list_add(&ino->active, &sbi->active_list);
85 spin_unlock(&sbi->lookup_lock);
90 static void autofs4_del_active(struct dentry *dentry)
92 struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb);
93 struct autofs_info *ino = autofs4_dentry_ino(dentry);
95 spin_lock(&sbi->lookup_lock);
97 if (!ino->active_count) {
98 if (!list_empty(&ino->active))
99 list_del_init(&ino->active);
101 spin_unlock(&sbi->lookup_lock);
106 static int autofs4_dir_open(struct inode *inode, struct file *file)
108 struct dentry *dentry = file->f_path.dentry;
109 struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb);
111 DPRINTK("file=%p dentry=%p %.*s",
112 file, dentry, dentry->d_name.len, dentry->d_name.name);
114 if (autofs4_oz_mode(sbi))
118 * An empty directory in an autofs file system is always a
119 * mount point. The daemon must have failed to mount this
120 * during lookup so it doesn't exist. This can happen, for
121 * example, if user space returns an incorrect status for a
122 * mount request. Otherwise we're doing a readdir on the
123 * autofs file system so just let the libfs routines handle
126 spin_lock(&sbi->lookup_lock);
127 if (!d_mountpoint(dentry) && simple_empty(dentry)) {
128 spin_unlock(&sbi->lookup_lock);
131 spin_unlock(&sbi->lookup_lock);
134 return dcache_dir_open(inode, file);
137 static void autofs4_dentry_release(struct dentry *de)
139 struct autofs_info *ino = autofs4_dentry_ino(de);
140 struct autofs_sb_info *sbi = autofs4_sbi(de->d_sb);
142 DPRINTK("releasing %p", de);
148 spin_lock(&sbi->lookup_lock);
149 if (!list_empty(&ino->active))
150 list_del(&ino->active);
151 if (!list_empty(&ino->expiring))
152 list_del(&ino->expiring);
153 spin_unlock(&sbi->lookup_lock);
156 autofs4_free_ino(ino);
159 static struct dentry *autofs4_lookup_active(struct dentry *dentry)
161 struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb);
162 struct dentry *parent = dentry->d_parent;
163 struct qstr *name = &dentry->d_name;
164 unsigned int len = name->len;
165 unsigned int hash = name->hash;
166 const unsigned char *str = name->name;
167 struct list_head *p, *head;
169 head = &sbi->active_list;
170 if (list_empty(head))
172 spin_lock(&sbi->lookup_lock);
173 list_for_each(p, head) {
174 struct autofs_info *ino;
175 struct dentry *active;
178 ino = list_entry(p, struct autofs_info, active);
179 active = ino->dentry;
181 spin_lock(&active->d_lock);
184 if ((int) d_count(active) <= 0)
187 qstr = &active->d_name;
189 if (active->d_name.hash != hash)
191 if (active->d_parent != parent)
194 if (qstr->len != len)
196 if (memcmp(qstr->name, str, len))
199 if (d_unhashed(active)) {
201 spin_unlock(&active->d_lock);
202 spin_unlock(&sbi->lookup_lock);
206 spin_unlock(&active->d_lock);
208 spin_unlock(&sbi->lookup_lock);
213 static struct dentry *autofs4_lookup_expiring(struct dentry *dentry)
215 struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb);
216 struct dentry *parent = dentry->d_parent;
217 struct qstr *name = &dentry->d_name;
218 unsigned int len = name->len;
219 unsigned int hash = name->hash;
220 const unsigned char *str = name->name;
221 struct list_head *p, *head;
223 head = &sbi->expiring_list;
224 if (list_empty(head))
226 spin_lock(&sbi->lookup_lock);
227 list_for_each(p, head) {
228 struct autofs_info *ino;
229 struct dentry *expiring;
232 ino = list_entry(p, struct autofs_info, expiring);
233 expiring = ino->dentry;
235 spin_lock(&expiring->d_lock);
237 /* We've already been dentry_iput or unlinked */
238 if (!expiring->d_inode)
241 qstr = &expiring->d_name;
243 if (expiring->d_name.hash != hash)
245 if (expiring->d_parent != parent)
248 if (qstr->len != len)
250 if (memcmp(qstr->name, str, len))
253 if (d_unhashed(expiring)) {
254 dget_dlock(expiring);
255 spin_unlock(&expiring->d_lock);
256 spin_unlock(&sbi->lookup_lock);
260 spin_unlock(&expiring->d_lock);
262 spin_unlock(&sbi->lookup_lock);
267 static int autofs4_mount_wait(struct dentry *dentry)
269 struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb);
270 struct autofs_info *ino = autofs4_dentry_ino(dentry);
273 if (ino->flags & AUTOFS_INF_PENDING) {
274 DPRINTK("waiting for mount name=%.*s",
275 dentry->d_name.len, dentry->d_name.name);
276 status = autofs4_wait(sbi, dentry, NFY_MOUNT);
277 DPRINTK("mount wait done status=%d", status);
279 ino->last_used = jiffies;
283 static int do_expire_wait(struct dentry *dentry)
285 struct dentry *expiring;
287 expiring = autofs4_lookup_expiring(dentry);
289 return autofs4_expire_wait(dentry);
292 * If we are racing with expire the request might not
293 * be quite complete, but the directory has been removed
294 * so it must have been successful, just wait for it.
296 autofs4_expire_wait(expiring);
297 autofs4_del_expiring(expiring);
303 static struct dentry *autofs4_mountpoint_changed(struct path *path)
305 struct dentry *dentry = path->dentry;
306 struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb);
309 * If this is an indirect mount the dentry could have gone away
310 * as a result of an expire and a new one created.
312 if (autofs_type_indirect(sbi->type) && d_unhashed(dentry)) {
313 struct dentry *parent = dentry->d_parent;
314 struct autofs_info *ino;
315 struct dentry *new = d_lookup(parent, &dentry->d_name);
318 ino = autofs4_dentry_ino(new);
319 ino->last_used = jiffies;
326 static struct vfsmount *autofs4_d_automount(struct path *path)
328 struct dentry *dentry = path->dentry;
329 struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb);
330 struct autofs_info *ino = autofs4_dentry_ino(dentry);
333 DPRINTK("dentry=%p %.*s",
334 dentry, dentry->d_name.len, dentry->d_name.name);
336 /* The daemon never triggers a mount. */
337 if (autofs4_oz_mode(sbi))
341 * If an expire request is pending everyone must wait.
342 * If the expire fails we're still mounted so continue
343 * the follow and return. A return of -EAGAIN (which only
344 * happens with indirect mounts) means the expire completed
345 * and the directory was removed, so just go ahead and try
348 status = do_expire_wait(dentry);
349 if (status && status != -EAGAIN)
352 /* Callback to the daemon to perform the mount or wait */
353 spin_lock(&sbi->fs_lock);
354 if (ino->flags & AUTOFS_INF_PENDING) {
355 spin_unlock(&sbi->fs_lock);
356 status = autofs4_mount_wait(dentry);
358 return ERR_PTR(status);
363 * If the dentry is a symlink it's equivalent to a directory
364 * having d_mountpoint() true, so there's no need to call back
367 if (dentry->d_inode && S_ISLNK(dentry->d_inode->i_mode)) {
368 spin_unlock(&sbi->fs_lock);
372 if (!d_mountpoint(dentry)) {
374 * It's possible that user space hasn't removed directories
375 * after umounting a rootless multi-mount, although it
376 * should. For v5 have_submounts() is sufficient to handle
377 * this because the leaves of the directory tree under the
378 * mount never trigger mounts themselves (they have an autofs
379 * trigger mount mounted on them). But v4 pseudo direct mounts
380 * do need the leaves to trigger mounts. In this case we
381 * have no choice but to use the list_empty() check and
382 * require user space behave.
384 if (sbi->version > 4) {
385 if (have_submounts(dentry)) {
386 spin_unlock(&sbi->fs_lock);
390 if (!simple_empty(dentry)) {
391 spin_unlock(&sbi->fs_lock);
395 ino->flags |= AUTOFS_INF_PENDING;
396 spin_unlock(&sbi->fs_lock);
397 status = autofs4_mount_wait(dentry);
398 spin_lock(&sbi->fs_lock);
399 ino->flags &= ~AUTOFS_INF_PENDING;
401 spin_unlock(&sbi->fs_lock);
402 return ERR_PTR(status);
405 spin_unlock(&sbi->fs_lock);
407 /* Mount succeeded, check if we ended up with a new dentry */
408 dentry = autofs4_mountpoint_changed(path);
410 return ERR_PTR(-ENOENT);
415 static int autofs4_d_manage(struct dentry *dentry, bool rcu_walk)
417 struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb);
418 struct autofs_info *ino = autofs4_dentry_ino(dentry);
421 DPRINTK("dentry=%p %.*s",
422 dentry, dentry->d_name.len, dentry->d_name.name);
424 /* The daemon never waits. */
425 if (autofs4_oz_mode(sbi)) {
428 if (!d_mountpoint(dentry))
433 /* We need to sleep, so we need pathwalk to be in ref-mode */
437 /* Wait for pending expires */
438 do_expire_wait(dentry);
441 * This dentry may be under construction so wait on mount
444 status = autofs4_mount_wait(dentry);
448 spin_lock(&sbi->fs_lock);
450 * If the dentry has been selected for expire while we slept
451 * on the lock then it might go away. We'll deal with that in
452 * ->d_automount() and wait on a new mount if the expire
453 * succeeds or return here if it doesn't (since there's no
454 * mount to follow with a rootless multi-mount).
456 if (!(ino->flags & AUTOFS_INF_EXPIRING)) {
458 * Any needed mounting has been completed and the path
459 * updated so check if this is a rootless multi-mount so
460 * we can avoid needless calls ->d_automount() and avoid
461 * an incorrect ELOOP error return.
463 if ((!d_mountpoint(dentry) && !simple_empty(dentry)) ||
464 (dentry->d_inode && S_ISLNK(dentry->d_inode->i_mode)))
467 spin_unlock(&sbi->fs_lock);
472 /* Lookups in the root directory */
473 static struct dentry *autofs4_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags)
475 struct autofs_sb_info *sbi;
476 struct autofs_info *ino;
477 struct dentry *active;
479 DPRINTK("name = %.*s", dentry->d_name.len, dentry->d_name.name);
481 /* File name too long to exist */
482 if (dentry->d_name.len > NAME_MAX)
483 return ERR_PTR(-ENAMETOOLONG);
485 sbi = autofs4_sbi(dir->i_sb);
487 DPRINTK("pid = %u, pgrp = %u, catatonic = %d, oz_mode = %d",
488 current->pid, task_pgrp_nr(current), sbi->catatonic,
489 autofs4_oz_mode(sbi));
491 active = autofs4_lookup_active(dentry);
496 * A dentry that is not within the root can never trigger a
497 * mount operation, unless the directory already exists, so we
498 * can return fail immediately. The daemon however does need
499 * to create directories within the file system.
501 if (!autofs4_oz_mode(sbi) && !IS_ROOT(dentry->d_parent))
502 return ERR_PTR(-ENOENT);
504 /* Mark entries in the root as mount triggers */
505 if (autofs_type_indirect(sbi->type) && IS_ROOT(dentry->d_parent))
506 __managed_dentry_set_managed(dentry);
508 ino = autofs4_new_ino(sbi);
510 return ERR_PTR(-ENOMEM);
512 dentry->d_fsdata = ino;
513 ino->dentry = dentry;
515 autofs4_add_active(dentry);
517 d_instantiate(dentry, NULL);
522 static int autofs4_dir_symlink(struct inode *dir,
523 struct dentry *dentry,
526 struct autofs_sb_info *sbi = autofs4_sbi(dir->i_sb);
527 struct autofs_info *ino = autofs4_dentry_ino(dentry);
528 struct autofs_info *p_ino;
530 size_t size = strlen(symname);
533 DPRINTK("%s <- %.*s", symname,
534 dentry->d_name.len, dentry->d_name.name);
536 if (!autofs4_oz_mode(sbi))
541 autofs4_clean_ino(ino);
543 autofs4_del_active(dentry);
545 cp = kmalloc(size + 1, GFP_KERNEL);
551 inode = autofs4_get_inode(dir->i_sb, S_IFLNK | 0555);
554 if (!dentry->d_fsdata)
558 inode->i_private = cp;
559 inode->i_size = size;
560 d_add(dentry, inode);
563 atomic_inc(&ino->count);
564 p_ino = autofs4_dentry_ino(dentry->d_parent);
565 if (p_ino && !IS_ROOT(dentry))
566 atomic_inc(&p_ino->count);
568 dir->i_mtime = CURRENT_TIME;
576 * Normal filesystems would do a "d_delete()" to tell the VFS dcache
577 * that the file no longer exists. However, doing that means that the
578 * VFS layer can turn the dentry into a negative dentry. We don't want
579 * this, because the unlink is probably the result of an expire.
580 * We simply d_drop it and add it to a expiring list in the super block,
581 * which allows the dentry lookup to check for an incomplete expire.
583 * If a process is blocked on the dentry waiting for the expire to finish,
584 * it will invalidate the dentry and try to mount with a new one.
586 * Also see autofs4_dir_rmdir()..
588 static int autofs4_dir_unlink(struct inode *dir, struct dentry *dentry)
590 struct autofs_sb_info *sbi = autofs4_sbi(dir->i_sb);
591 struct autofs_info *ino = autofs4_dentry_ino(dentry);
592 struct autofs_info *p_ino;
594 /* This allows root to remove symlinks */
595 if (!autofs4_oz_mode(sbi) && !capable(CAP_SYS_ADMIN))
598 if (atomic_dec_and_test(&ino->count)) {
599 p_ino = autofs4_dentry_ino(dentry->d_parent);
600 if (p_ino && !IS_ROOT(dentry))
601 atomic_dec(&p_ino->count);
605 dentry->d_inode->i_size = 0;
606 clear_nlink(dentry->d_inode);
608 dir->i_mtime = CURRENT_TIME;
610 spin_lock(&sbi->lookup_lock);
611 __autofs4_add_expiring(dentry);
613 spin_unlock(&sbi->lookup_lock);
619 * Version 4 of autofs provides a pseudo direct mount implementation
620 * that relies on directories at the leaves of a directory tree under
621 * an indirect mount to trigger mounts. To allow for this we need to
622 * set the DMANAGED_AUTOMOUNT and DMANAGED_TRANSIT flags on the leaves
623 * of the directory tree. There is no need to clear the automount flag
624 * following a mount or restore it after an expire because these mounts
625 * are always covered. However, it is necessary to ensure that these
626 * flags are clear on non-empty directories to avoid unnecessary calls
629 static void autofs_set_leaf_automount_flags(struct dentry *dentry)
631 struct dentry *parent;
633 /* root and dentrys in the root are already handled */
634 if (IS_ROOT(dentry->d_parent))
637 managed_dentry_set_managed(dentry);
639 parent = dentry->d_parent;
640 /* only consider parents below dentrys in the root */
641 if (IS_ROOT(parent->d_parent))
643 managed_dentry_clear_managed(parent);
647 static void autofs_clear_leaf_automount_flags(struct dentry *dentry)
649 struct list_head *d_child;
650 struct dentry *parent;
652 /* flags for dentrys in the root are handled elsewhere */
653 if (IS_ROOT(dentry->d_parent))
656 managed_dentry_clear_managed(dentry);
658 parent = dentry->d_parent;
659 /* only consider parents below dentrys in the root */
660 if (IS_ROOT(parent->d_parent))
662 d_child = &dentry->d_u.d_child;
663 /* Set parent managed if it's becoming empty */
664 if (d_child->next == &parent->d_subdirs &&
665 d_child->prev == &parent->d_subdirs)
666 managed_dentry_set_managed(parent);
670 static int autofs4_dir_rmdir(struct inode *dir, struct dentry *dentry)
672 struct autofs_sb_info *sbi = autofs4_sbi(dir->i_sb);
673 struct autofs_info *ino = autofs4_dentry_ino(dentry);
674 struct autofs_info *p_ino;
676 DPRINTK("dentry %p, removing %.*s",
677 dentry, dentry->d_name.len, dentry->d_name.name);
679 if (!autofs4_oz_mode(sbi))
682 spin_lock(&sbi->lookup_lock);
683 if (!simple_empty(dentry)) {
684 spin_unlock(&sbi->lookup_lock);
687 __autofs4_add_expiring(dentry);
689 spin_unlock(&sbi->lookup_lock);
691 if (sbi->version < 5)
692 autofs_clear_leaf_automount_flags(dentry);
694 if (atomic_dec_and_test(&ino->count)) {
695 p_ino = autofs4_dentry_ino(dentry->d_parent);
696 if (p_ino && dentry->d_parent != dentry)
697 atomic_dec(&p_ino->count);
700 dentry->d_inode->i_size = 0;
701 clear_nlink(dentry->d_inode);
709 static int autofs4_dir_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
711 struct autofs_sb_info *sbi = autofs4_sbi(dir->i_sb);
712 struct autofs_info *ino = autofs4_dentry_ino(dentry);
713 struct autofs_info *p_ino;
716 if (!autofs4_oz_mode(sbi))
719 DPRINTK("dentry %p, creating %.*s",
720 dentry, dentry->d_name.len, dentry->d_name.name);
724 autofs4_clean_ino(ino);
726 autofs4_del_active(dentry);
728 inode = autofs4_get_inode(dir->i_sb, S_IFDIR | 0555);
731 d_add(dentry, inode);
733 if (sbi->version < 5)
734 autofs_set_leaf_automount_flags(dentry);
737 atomic_inc(&ino->count);
738 p_ino = autofs4_dentry_ino(dentry->d_parent);
739 if (p_ino && !IS_ROOT(dentry))
740 atomic_inc(&p_ino->count);
742 dir->i_mtime = CURRENT_TIME;
747 /* Get/set timeout ioctl() operation */
749 static inline int autofs4_compat_get_set_timeout(struct autofs_sb_info *sbi,
750 compat_ulong_t __user *p)
753 unsigned long ntimeout;
755 if ((rv = get_user(ntimeout, p)) ||
756 (rv = put_user(sbi->exp_timeout/HZ, p)))
759 if (ntimeout > UINT_MAX/HZ)
760 sbi->exp_timeout = 0;
762 sbi->exp_timeout = ntimeout * HZ;
768 static inline int autofs4_get_set_timeout(struct autofs_sb_info *sbi,
769 unsigned long __user *p)
772 unsigned long ntimeout;
774 if ((rv = get_user(ntimeout, p)) ||
775 (rv = put_user(sbi->exp_timeout/HZ, p)))
778 if (ntimeout > ULONG_MAX/HZ)
779 sbi->exp_timeout = 0;
781 sbi->exp_timeout = ntimeout * HZ;
786 /* Return protocol version */
787 static inline int autofs4_get_protover(struct autofs_sb_info *sbi, int __user *p)
789 return put_user(sbi->version, p);
792 /* Return protocol sub version */
793 static inline int autofs4_get_protosubver(struct autofs_sb_info *sbi, int __user *p)
795 return put_user(sbi->sub_version, p);
799 * Tells the daemon whether it can umount the autofs mount.
801 static inline int autofs4_ask_umount(struct vfsmount *mnt, int __user *p)
808 DPRINTK("returning %d", status);
810 status = put_user(status, p);
815 /* Identify autofs4_dentries - this is so we can tell if there's
816 an extra dentry refcount or not. We only hold a refcount on the
817 dentry if its non-negative (ie, d_inode != NULL)
819 int is_autofs4_dentry(struct dentry *dentry)
821 return dentry && dentry->d_inode &&
822 dentry->d_op == &autofs4_dentry_operations &&
823 dentry->d_fsdata != NULL;
827 * ioctl()'s on the root directory is the chief method for the daemon to
828 * generate kernel reactions
830 static int autofs4_root_ioctl_unlocked(struct inode *inode, struct file *filp,
831 unsigned int cmd, unsigned long arg)
833 struct autofs_sb_info *sbi = autofs4_sbi(inode->i_sb);
834 void __user *p = (void __user *)arg;
836 DPRINTK("cmd = 0x%08x, arg = 0x%08lx, sbi = %p, pgrp = %u",
837 cmd,arg,sbi,task_pgrp_nr(current));
839 if (_IOC_TYPE(cmd) != _IOC_TYPE(AUTOFS_IOC_FIRST) ||
840 _IOC_NR(cmd) - _IOC_NR(AUTOFS_IOC_FIRST) >= AUTOFS_IOC_COUNT)
843 if (!autofs4_oz_mode(sbi) && !capable(CAP_SYS_ADMIN))
847 case AUTOFS_IOC_READY: /* Wait queue: go ahead and retry */
848 return autofs4_wait_release(sbi,(autofs_wqt_t)arg,0);
849 case AUTOFS_IOC_FAIL: /* Wait queue: fail with ENOENT */
850 return autofs4_wait_release(sbi,(autofs_wqt_t)arg,-ENOENT);
851 case AUTOFS_IOC_CATATONIC: /* Enter catatonic mode (daemon shutdown) */
852 autofs4_catatonic_mode(sbi);
854 case AUTOFS_IOC_PROTOVER: /* Get protocol version */
855 return autofs4_get_protover(sbi, p);
856 case AUTOFS_IOC_PROTOSUBVER: /* Get protocol sub version */
857 return autofs4_get_protosubver(sbi, p);
858 case AUTOFS_IOC_SETTIMEOUT:
859 return autofs4_get_set_timeout(sbi, p);
861 case AUTOFS_IOC_SETTIMEOUT32:
862 return autofs4_compat_get_set_timeout(sbi, p);
865 case AUTOFS_IOC_ASKUMOUNT:
866 return autofs4_ask_umount(filp->f_path.mnt, p);
868 /* return a single thing to expire */
869 case AUTOFS_IOC_EXPIRE:
870 return autofs4_expire_run(inode->i_sb,filp->f_path.mnt,sbi, p);
871 /* same as above, but can send multiple expires through pipe */
872 case AUTOFS_IOC_EXPIRE_MULTI:
873 return autofs4_expire_multi(inode->i_sb,filp->f_path.mnt,sbi, p);
880 static long autofs4_root_ioctl(struct file *filp,
881 unsigned int cmd, unsigned long arg)
883 struct inode *inode = file_inode(filp);
884 return autofs4_root_ioctl_unlocked(inode, filp, cmd, arg);
888 static long autofs4_root_compat_ioctl(struct file *filp,
889 unsigned int cmd, unsigned long arg)
891 struct inode *inode = file_inode(filp);
894 if (cmd == AUTOFS_IOC_READY || cmd == AUTOFS_IOC_FAIL)
895 ret = autofs4_root_ioctl_unlocked(inode, filp, cmd, arg);
897 ret = autofs4_root_ioctl_unlocked(inode, filp, cmd,
898 (unsigned long)compat_ptr(arg));