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);
40 static void autofs4_dentry_release(struct dentry *);
42 const struct file_operations autofs4_root_operations = {
43 .open = dcache_dir_open,
44 .release = dcache_dir_close,
45 .read = generic_read_dir,
46 .readdir = dcache_readdir,
47 .llseek = dcache_dir_lseek,
48 .unlocked_ioctl = autofs4_root_ioctl,
50 .compat_ioctl = autofs4_root_compat_ioctl,
54 const struct file_operations autofs4_dir_operations = {
55 .open = autofs4_dir_open,
56 .release = dcache_dir_close,
57 .read = generic_read_dir,
58 .readdir = dcache_readdir,
59 .llseek = dcache_dir_lseek,
62 const struct inode_operations autofs4_dir_inode_operations = {
63 .lookup = autofs4_lookup,
64 .unlink = autofs4_dir_unlink,
65 .symlink = autofs4_dir_symlink,
66 .mkdir = autofs4_dir_mkdir,
67 .rmdir = autofs4_dir_rmdir,
70 const struct dentry_operations autofs4_dentry_operations = {
71 .d_automount = autofs4_d_automount,
72 .d_manage = autofs4_d_manage,
73 .d_release = autofs4_dentry_release,
76 static void autofs4_add_active(struct dentry *dentry)
78 struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb);
79 struct autofs_info *ino = autofs4_dentry_ino(dentry);
81 spin_lock(&sbi->lookup_lock);
82 if (!ino->active_count) {
83 if (list_empty(&ino->active))
84 list_add(&ino->active, &sbi->active_list);
87 spin_unlock(&sbi->lookup_lock);
92 static void autofs4_del_active(struct dentry *dentry)
94 struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb);
95 struct autofs_info *ino = autofs4_dentry_ino(dentry);
97 spin_lock(&sbi->lookup_lock);
99 if (!ino->active_count) {
100 if (!list_empty(&ino->active))
101 list_del_init(&ino->active);
103 spin_unlock(&sbi->lookup_lock);
108 static int autofs4_dir_open(struct inode *inode, struct file *file)
110 struct dentry *dentry = file->f_path.dentry;
111 struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb);
113 DPRINTK("file=%p dentry=%p %.*s",
114 file, dentry, dentry->d_name.len, dentry->d_name.name);
116 if (autofs4_oz_mode(sbi))
120 * An empty directory in an autofs file system is always a
121 * mount point. The daemon must have failed to mount this
122 * during lookup so it doesn't exist. This can happen, for
123 * example, if user space returns an incorrect status for a
124 * mount request. Otherwise we're doing a readdir on the
125 * autofs file system so just let the libfs routines handle
128 spin_lock(&autofs4_lock);
129 spin_lock(&dentry->d_lock);
130 if (!d_mountpoint(dentry) && list_empty(&dentry->d_subdirs)) {
131 spin_unlock(&dentry->d_lock);
132 spin_unlock(&autofs4_lock);
135 spin_unlock(&dentry->d_lock);
136 spin_unlock(&autofs4_lock);
139 return dcache_dir_open(inode, file);
142 static void autofs4_dentry_release(struct dentry *de)
144 struct autofs_info *ino = autofs4_dentry_ino(de);
145 struct autofs_sb_info *sbi = autofs4_sbi(de->d_sb);
147 DPRINTK("releasing %p", de);
153 spin_lock(&sbi->lookup_lock);
154 if (!list_empty(&ino->active))
155 list_del(&ino->active);
156 if (!list_empty(&ino->expiring))
157 list_del(&ino->expiring);
158 spin_unlock(&sbi->lookup_lock);
161 autofs4_free_ino(ino);
164 static struct dentry *autofs4_lookup_active(struct dentry *dentry)
166 struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb);
167 struct dentry *parent = dentry->d_parent;
168 struct qstr *name = &dentry->d_name;
169 unsigned int len = name->len;
170 unsigned int hash = name->hash;
171 const unsigned char *str = name->name;
172 struct list_head *p, *head;
174 spin_lock(&autofs4_lock);
175 spin_lock(&sbi->lookup_lock);
176 head = &sbi->active_list;
177 list_for_each(p, head) {
178 struct autofs_info *ino;
179 struct dentry *active;
182 ino = list_entry(p, struct autofs_info, active);
183 active = ino->dentry;
185 spin_lock(&active->d_lock);
188 if (active->d_count == 0)
191 qstr = &active->d_name;
193 if (active->d_name.hash != hash)
195 if (active->d_parent != parent)
198 if (qstr->len != len)
200 if (memcmp(qstr->name, str, len))
203 if (d_unhashed(active)) {
205 spin_unlock(&active->d_lock);
206 spin_unlock(&sbi->lookup_lock);
207 spin_unlock(&autofs4_lock);
211 spin_unlock(&active->d_lock);
213 spin_unlock(&sbi->lookup_lock);
214 spin_unlock(&autofs4_lock);
219 static struct dentry *autofs4_lookup_expiring(struct dentry *dentry)
221 struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb);
222 struct dentry *parent = dentry->d_parent;
223 struct qstr *name = &dentry->d_name;
224 unsigned int len = name->len;
225 unsigned int hash = name->hash;
226 const unsigned char *str = name->name;
227 struct list_head *p, *head;
229 spin_lock(&autofs4_lock);
230 spin_lock(&sbi->lookup_lock);
231 head = &sbi->expiring_list;
232 list_for_each(p, head) {
233 struct autofs_info *ino;
234 struct dentry *expiring;
237 ino = list_entry(p, struct autofs_info, expiring);
238 expiring = ino->dentry;
240 spin_lock(&expiring->d_lock);
242 /* Bad luck, we've already been dentry_iput */
243 if (!expiring->d_inode)
246 qstr = &expiring->d_name;
248 if (expiring->d_name.hash != hash)
250 if (expiring->d_parent != parent)
253 if (qstr->len != len)
255 if (memcmp(qstr->name, str, len))
258 if (d_unhashed(expiring)) {
259 dget_dlock(expiring);
260 spin_unlock(&expiring->d_lock);
261 spin_unlock(&sbi->lookup_lock);
262 spin_unlock(&autofs4_lock);
266 spin_unlock(&expiring->d_lock);
268 spin_unlock(&sbi->lookup_lock);
269 spin_unlock(&autofs4_lock);
274 static int autofs4_mount_wait(struct dentry *dentry)
276 struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb);
277 struct autofs_info *ino = autofs4_dentry_ino(dentry);
280 if (ino->flags & AUTOFS_INF_PENDING) {
281 DPRINTK("waiting for mount name=%.*s",
282 dentry->d_name.len, dentry->d_name.name);
283 status = autofs4_wait(sbi, dentry, NFY_MOUNT);
284 DPRINTK("mount wait done status=%d", status);
286 ino->last_used = jiffies;
290 static int do_expire_wait(struct dentry *dentry)
292 struct dentry *expiring;
294 expiring = autofs4_lookup_expiring(dentry);
296 return autofs4_expire_wait(dentry);
299 * If we are racing with expire the request might not
300 * be quite complete, but the directory has been removed
301 * so it must have been successful, just wait for it.
303 autofs4_expire_wait(expiring);
304 autofs4_del_expiring(expiring);
310 static struct dentry *autofs4_mountpoint_changed(struct path *path)
312 struct dentry *dentry = path->dentry;
313 struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb);
316 * If this is an indirect mount the dentry could have gone away
317 * as a result of an expire and a new one created.
319 if (autofs_type_indirect(sbi->type) && d_unhashed(dentry)) {
320 struct dentry *parent = dentry->d_parent;
321 struct autofs_info *ino;
322 struct dentry *new = d_lookup(parent, &dentry->d_name);
325 ino = autofs4_dentry_ino(new);
326 ino->last_used = jiffies;
333 static struct vfsmount *autofs4_d_automount(struct path *path)
335 struct dentry *dentry = path->dentry;
336 struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb);
337 struct autofs_info *ino = autofs4_dentry_ino(dentry);
340 DPRINTK("dentry=%p %.*s",
341 dentry, dentry->d_name.len, dentry->d_name.name);
343 /* The daemon never triggers a mount. */
344 if (autofs4_oz_mode(sbi))
348 * If an expire request is pending everyone must wait.
349 * If the expire fails we're still mounted so continue
350 * the follow and return. A return of -EAGAIN (which only
351 * happens with indirect mounts) means the expire completed
352 * and the directory was removed, so just go ahead and try
355 status = do_expire_wait(dentry);
356 if (status && status != -EAGAIN)
359 /* Callback to the daemon to perform the mount or wait */
360 spin_lock(&sbi->fs_lock);
361 if (ino->flags & AUTOFS_INF_PENDING) {
362 spin_unlock(&sbi->fs_lock);
363 status = autofs4_mount_wait(dentry);
365 return ERR_PTR(status);
366 spin_lock(&sbi->fs_lock);
371 * If the dentry is a symlink it's equivalent to a directory
372 * having d_mountpoint() true, so there's no need to call back
375 if (dentry->d_inode && S_ISLNK(dentry->d_inode->i_mode))
377 if (!d_mountpoint(dentry)) {
379 * It's possible that user space hasn't removed directories
380 * after umounting a rootless multi-mount, although it
381 * should. For v5 have_submounts() is sufficient to handle
382 * this because the leaves of the directory tree under the
383 * mount never trigger mounts themselves (they have an autofs
384 * trigger mount mounted on them). But v4 pseudo direct mounts
385 * do need the leaves to to trigger mounts. In this case we
386 * have no choice but to use the list_empty() check and
387 * require user space behave.
389 if (sbi->version > 4) {
390 if (have_submounts(dentry))
393 spin_lock(&dentry->d_lock);
394 if (!list_empty(&dentry->d_subdirs)) {
395 spin_unlock(&dentry->d_lock);
398 spin_unlock(&dentry->d_lock);
400 ino->flags |= AUTOFS_INF_PENDING;
401 spin_unlock(&sbi->fs_lock);
402 status = autofs4_mount_wait(dentry);
404 return ERR_PTR(status);
405 spin_lock(&sbi->fs_lock);
406 ino->flags &= ~AUTOFS_INF_PENDING;
409 if (!(ino->flags & AUTOFS_INF_EXPIRING)) {
411 * Any needed mounting has been completed and the path
412 * updated so clear DCACHE_NEED_AUTOMOUNT so we don't
413 * call ->d_automount() on rootless multi-mounts since
414 * it can lead to an incorrect ELOOP error return.
416 * Only clear DMANAGED_AUTOMOUNT for rootless multi-mounts and
417 * symlinks as in all other cases the dentry will be covered by
418 * an actual mount so ->d_automount() won't be called during
421 spin_lock(&dentry->d_lock);
422 if ((!d_mountpoint(dentry) &&
423 !list_empty(&dentry->d_subdirs)) ||
424 (dentry->d_inode && S_ISLNK(dentry->d_inode->i_mode)))
425 __managed_dentry_clear_automount(dentry);
426 spin_unlock(&dentry->d_lock);
428 spin_unlock(&sbi->fs_lock);
430 /* Mount succeeded, check if we ended up with a new dentry */
431 dentry = autofs4_mountpoint_changed(path);
433 return ERR_PTR(-ENOENT);
438 int autofs4_d_manage(struct dentry *dentry, bool rcu_walk)
440 struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb);
442 DPRINTK("dentry=%p %.*s",
443 dentry, dentry->d_name.len, dentry->d_name.name);
445 /* The daemon never waits. */
446 if (autofs4_oz_mode(sbi)) {
449 if (!d_mountpoint(dentry))
454 /* We need to sleep, so we need pathwalk to be in ref-mode */
458 /* Wait for pending expires */
459 do_expire_wait(dentry);
462 * This dentry may be under construction so wait on mount
465 return autofs4_mount_wait(dentry);
468 /* Lookups in the root directory */
469 static struct dentry *autofs4_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
471 struct autofs_sb_info *sbi;
472 struct autofs_info *ino;
473 struct dentry *active;
475 DPRINTK("name = %.*s", dentry->d_name.len, dentry->d_name.name);
477 /* File name too long to exist */
478 if (dentry->d_name.len > NAME_MAX)
479 return ERR_PTR(-ENAMETOOLONG);
481 sbi = autofs4_sbi(dir->i_sb);
483 DPRINTK("pid = %u, pgrp = %u, catatonic = %d, oz_mode = %d",
484 current->pid, task_pgrp_nr(current), sbi->catatonic,
485 autofs4_oz_mode(sbi));
487 active = autofs4_lookup_active(dentry);
492 * A dentry that is not within the root can never trigger a
493 * mount operation, unless the directory already exists, so we
494 * can return fail immediately. The daemon however does need
495 * to create directories within the file system.
497 if (!autofs4_oz_mode(sbi) && !IS_ROOT(dentry->d_parent))
498 return ERR_PTR(-ENOENT);
500 /* Mark entries in the root as mount triggers */
501 if (autofs_type_indirect(sbi->type) && IS_ROOT(dentry->d_parent))
502 __managed_dentry_set_managed(dentry);
504 ino = autofs4_new_ino(sbi);
506 return ERR_PTR(-ENOMEM);
508 dentry->d_fsdata = ino;
509 ino->dentry = dentry;
511 autofs4_add_active(dentry);
513 d_instantiate(dentry, NULL);
518 static int autofs4_dir_symlink(struct inode *dir,
519 struct dentry *dentry,
522 struct autofs_sb_info *sbi = autofs4_sbi(dir->i_sb);
523 struct autofs_info *ino = autofs4_dentry_ino(dentry);
524 struct autofs_info *p_ino;
526 size_t size = strlen(symname);
529 DPRINTK("%s <- %.*s", symname,
530 dentry->d_name.len, dentry->d_name.name);
532 if (!autofs4_oz_mode(sbi))
537 autofs4_clean_ino(ino);
539 autofs4_del_active(dentry);
541 cp = kmalloc(size + 1, GFP_KERNEL);
547 inode = autofs4_get_inode(dir->i_sb, S_IFLNK | 0555);
550 if (!dentry->d_fsdata)
554 inode->i_private = cp;
555 inode->i_size = size;
556 d_add(dentry, inode);
559 atomic_inc(&ino->count);
560 p_ino = autofs4_dentry_ino(dentry->d_parent);
561 if (p_ino && dentry->d_parent != dentry)
562 atomic_inc(&p_ino->count);
564 dir->i_mtime = CURRENT_TIME;
572 * Normal filesystems would do a "d_delete()" to tell the VFS dcache
573 * that the file no longer exists. However, doing that means that the
574 * VFS layer can turn the dentry into a negative dentry. We don't want
575 * this, because the unlink is probably the result of an expire.
576 * We simply d_drop it and add it to a expiring list in the super block,
577 * which allows the dentry lookup to check for an incomplete expire.
579 * If a process is blocked on the dentry waiting for the expire to finish,
580 * it will invalidate the dentry and try to mount with a new one.
582 * Also see autofs4_dir_rmdir()..
584 static int autofs4_dir_unlink(struct inode *dir, struct dentry *dentry)
586 struct autofs_sb_info *sbi = autofs4_sbi(dir->i_sb);
587 struct autofs_info *ino = autofs4_dentry_ino(dentry);
588 struct autofs_info *p_ino;
590 /* This allows root to remove symlinks */
591 if (!autofs4_oz_mode(sbi) && !capable(CAP_SYS_ADMIN))
594 if (atomic_dec_and_test(&ino->count)) {
595 p_ino = autofs4_dentry_ino(dentry->d_parent);
596 if (p_ino && dentry->d_parent != dentry)
597 atomic_dec(&p_ino->count);
601 dentry->d_inode->i_size = 0;
602 clear_nlink(dentry->d_inode);
604 dir->i_mtime = CURRENT_TIME;
606 spin_lock(&autofs4_lock);
607 autofs4_add_expiring(dentry);
608 spin_lock(&dentry->d_lock);
610 spin_unlock(&dentry->d_lock);
611 spin_unlock(&autofs4_lock);
617 * Version 4 of autofs provides a pseudo direct mount implementation
618 * that relies on directories at the leaves of a directory tree under
619 * an indirect mount to trigger mounts. To allow for this we need to
620 * set the DMANAGED_AUTOMOUNT and DMANAGED_TRANSIT flags on the leaves
621 * of the directory tree. There is no need to clear the automount flag
622 * following a mount or restore it after an expire because these mounts
623 * are always covered. However, it is neccessary to ensure that these
624 * flags are clear on non-empty directories to avoid unnecessary calls
627 static void autofs_set_leaf_automount_flags(struct dentry *dentry)
629 struct dentry *parent;
631 /* root and dentrys in the root are already handled */
632 if (IS_ROOT(dentry->d_parent))
635 managed_dentry_set_managed(dentry);
637 parent = dentry->d_parent;
638 /* only consider parents below dentrys in the root */
639 if (IS_ROOT(parent->d_parent))
641 managed_dentry_clear_managed(parent);
645 static void autofs_clear_leaf_automount_flags(struct dentry *dentry)
647 struct list_head *d_child;
648 struct dentry *parent;
650 /* flags for dentrys in the root are handled elsewhere */
651 if (IS_ROOT(dentry->d_parent))
654 managed_dentry_clear_managed(dentry);
656 parent = dentry->d_parent;
657 /* only consider parents below dentrys in the root */
658 if (IS_ROOT(parent->d_parent))
660 d_child = &dentry->d_u.d_child;
661 /* Set parent managed if it's becoming empty */
662 if (d_child->next == &parent->d_subdirs &&
663 d_child->prev == &parent->d_subdirs)
664 managed_dentry_set_managed(parent);
668 static int autofs4_dir_rmdir(struct inode *dir, struct dentry *dentry)
670 struct autofs_sb_info *sbi = autofs4_sbi(dir->i_sb);
671 struct autofs_info *ino = autofs4_dentry_ino(dentry);
672 struct autofs_info *p_ino;
674 DPRINTK("dentry %p, removing %.*s",
675 dentry, dentry->d_name.len, dentry->d_name.name);
677 if (!autofs4_oz_mode(sbi))
680 spin_lock(&autofs4_lock);
681 spin_lock(&sbi->lookup_lock);
682 spin_lock(&dentry->d_lock);
683 if (!list_empty(&dentry->d_subdirs)) {
684 spin_unlock(&dentry->d_lock);
685 spin_unlock(&sbi->lookup_lock);
686 spin_unlock(&autofs4_lock);
689 __autofs4_add_expiring(dentry);
690 spin_unlock(&sbi->lookup_lock);
692 spin_unlock(&dentry->d_lock);
693 spin_unlock(&autofs4_lock);
695 if (sbi->version < 5)
696 autofs_clear_leaf_automount_flags(dentry);
698 if (atomic_dec_and_test(&ino->count)) {
699 p_ino = autofs4_dentry_ino(dentry->d_parent);
700 if (p_ino && dentry->d_parent != dentry)
701 atomic_dec(&p_ino->count);
704 dentry->d_inode->i_size = 0;
705 clear_nlink(dentry->d_inode);
713 static int autofs4_dir_mkdir(struct inode *dir, struct dentry *dentry, int mode)
715 struct autofs_sb_info *sbi = autofs4_sbi(dir->i_sb);
716 struct autofs_info *ino = autofs4_dentry_ino(dentry);
717 struct autofs_info *p_ino;
720 if (!autofs4_oz_mode(sbi))
723 DPRINTK("dentry %p, creating %.*s",
724 dentry, dentry->d_name.len, dentry->d_name.name);
728 autofs4_clean_ino(ino);
730 autofs4_del_active(dentry);
732 inode = autofs4_get_inode(dir->i_sb, S_IFDIR | 0555);
735 d_add(dentry, inode);
737 if (sbi->version < 5)
738 autofs_set_leaf_automount_flags(dentry);
741 atomic_inc(&ino->count);
742 p_ino = autofs4_dentry_ino(dentry->d_parent);
743 if (p_ino && dentry->d_parent != dentry)
744 atomic_inc(&p_ino->count);
746 dir->i_mtime = CURRENT_TIME;
751 /* Get/set timeout ioctl() operation */
753 static inline int autofs4_compat_get_set_timeout(struct autofs_sb_info *sbi,
754 compat_ulong_t __user *p)
757 unsigned long ntimeout;
759 if ((rv = get_user(ntimeout, p)) ||
760 (rv = put_user(sbi->exp_timeout/HZ, p)))
763 if (ntimeout > UINT_MAX/HZ)
764 sbi->exp_timeout = 0;
766 sbi->exp_timeout = ntimeout * HZ;
772 static inline int autofs4_get_set_timeout(struct autofs_sb_info *sbi,
773 unsigned long __user *p)
776 unsigned long ntimeout;
778 if ((rv = get_user(ntimeout, p)) ||
779 (rv = put_user(sbi->exp_timeout/HZ, p)))
782 if (ntimeout > ULONG_MAX/HZ)
783 sbi->exp_timeout = 0;
785 sbi->exp_timeout = ntimeout * HZ;
790 /* Return protocol version */
791 static inline int autofs4_get_protover(struct autofs_sb_info *sbi, int __user *p)
793 return put_user(sbi->version, p);
796 /* Return protocol sub version */
797 static inline int autofs4_get_protosubver(struct autofs_sb_info *sbi, int __user *p)
799 return put_user(sbi->sub_version, p);
803 * Tells the daemon whether it can umount the autofs mount.
805 static inline int autofs4_ask_umount(struct vfsmount *mnt, int __user *p)
812 DPRINTK("returning %d", status);
814 status = put_user(status, p);
819 /* Identify autofs4_dentries - this is so we can tell if there's
820 an extra dentry refcount or not. We only hold a refcount on the
821 dentry if its non-negative (ie, d_inode != NULL)
823 int is_autofs4_dentry(struct dentry *dentry)
825 return dentry && dentry->d_inode &&
826 dentry->d_op == &autofs4_dentry_operations &&
827 dentry->d_fsdata != NULL;
831 * ioctl()'s on the root directory is the chief method for the daemon to
832 * generate kernel reactions
834 static int autofs4_root_ioctl_unlocked(struct inode *inode, struct file *filp,
835 unsigned int cmd, unsigned long arg)
837 struct autofs_sb_info *sbi = autofs4_sbi(inode->i_sb);
838 void __user *p = (void __user *)arg;
840 DPRINTK("cmd = 0x%08x, arg = 0x%08lx, sbi = %p, pgrp = %u",
841 cmd,arg,sbi,task_pgrp_nr(current));
843 if (_IOC_TYPE(cmd) != _IOC_TYPE(AUTOFS_IOC_FIRST) ||
844 _IOC_NR(cmd) - _IOC_NR(AUTOFS_IOC_FIRST) >= AUTOFS_IOC_COUNT)
847 if (!autofs4_oz_mode(sbi) && !capable(CAP_SYS_ADMIN))
851 case AUTOFS_IOC_READY: /* Wait queue: go ahead and retry */
852 return autofs4_wait_release(sbi,(autofs_wqt_t)arg,0);
853 case AUTOFS_IOC_FAIL: /* Wait queue: fail with ENOENT */
854 return autofs4_wait_release(sbi,(autofs_wqt_t)arg,-ENOENT);
855 case AUTOFS_IOC_CATATONIC: /* Enter catatonic mode (daemon shutdown) */
856 autofs4_catatonic_mode(sbi);
858 case AUTOFS_IOC_PROTOVER: /* Get protocol version */
859 return autofs4_get_protover(sbi, p);
860 case AUTOFS_IOC_PROTOSUBVER: /* Get protocol sub version */
861 return autofs4_get_protosubver(sbi, p);
862 case AUTOFS_IOC_SETTIMEOUT:
863 return autofs4_get_set_timeout(sbi, p);
865 case AUTOFS_IOC_SETTIMEOUT32:
866 return autofs4_compat_get_set_timeout(sbi, p);
869 case AUTOFS_IOC_ASKUMOUNT:
870 return autofs4_ask_umount(filp->f_path.mnt, p);
872 /* return a single thing to expire */
873 case AUTOFS_IOC_EXPIRE:
874 return autofs4_expire_run(inode->i_sb,filp->f_path.mnt,sbi, p);
875 /* same as above, but can send multiple expires through pipe */
876 case AUTOFS_IOC_EXPIRE_MULTI:
877 return autofs4_expire_multi(inode->i_sb,filp->f_path.mnt,sbi, p);
884 static long autofs4_root_ioctl(struct file *filp,
885 unsigned int cmd, unsigned long arg)
887 struct inode *inode = filp->f_dentry->d_inode;
888 return autofs4_root_ioctl_unlocked(inode, filp, cmd, arg);
892 static long autofs4_root_compat_ioctl(struct file *filp,
893 unsigned int cmd, unsigned long arg)
895 struct inode *inode = filp->f_path.dentry->d_inode;
898 if (cmd == AUTOFS_IOC_READY || cmd == AUTOFS_IOC_FAIL)
899 ret = autofs4_root_ioctl_unlocked(inode, filp, cmd, arg);
901 ret = autofs4_root_ioctl_unlocked(inode, filp, cmd,
902 (unsigned long)compat_ptr(arg));