1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Copyright 1997-1998 Transmeta Corporation -- All Rights Reserved
4 * Copyright 1999-2000 Jeremy Fitzhardinge <jeremy@goop.org>
5 * Copyright 2001-2006 Ian Kent <raven@themaw.net>
8 #include <linux/capability.h>
9 #include <linux/compat.h>
13 static int autofs_dir_symlink(struct inode *, struct dentry *, const char *);
14 static int autofs_dir_unlink(struct inode *, struct dentry *);
15 static int autofs_dir_rmdir(struct inode *, struct dentry *);
16 static int autofs_dir_mkdir(struct inode *, struct dentry *, umode_t);
17 static long autofs_root_ioctl(struct file *, unsigned int, unsigned long);
19 static long autofs_root_compat_ioctl(struct file *,
20 unsigned int, unsigned long);
22 static int autofs_dir_open(struct inode *inode, struct file *file);
23 static struct dentry *autofs_lookup(struct inode *,
24 struct dentry *, unsigned int);
25 static struct vfsmount *autofs_d_automount(struct path *);
26 static int autofs_d_manage(const struct path *, bool);
27 static void autofs_dentry_release(struct dentry *);
29 const struct file_operations autofs_root_operations = {
30 .open = dcache_dir_open,
31 .release = dcache_dir_close,
32 .read = generic_read_dir,
33 .iterate_shared = dcache_readdir,
34 .llseek = dcache_dir_lseek,
35 .unlocked_ioctl = autofs_root_ioctl,
37 .compat_ioctl = autofs_root_compat_ioctl,
41 const struct file_operations autofs_dir_operations = {
42 .open = autofs_dir_open,
43 .release = dcache_dir_close,
44 .read = generic_read_dir,
45 .iterate_shared = dcache_readdir,
46 .llseek = dcache_dir_lseek,
49 const struct inode_operations autofs_dir_inode_operations = {
50 .lookup = autofs_lookup,
51 .unlink = autofs_dir_unlink,
52 .symlink = autofs_dir_symlink,
53 .mkdir = autofs_dir_mkdir,
54 .rmdir = autofs_dir_rmdir,
57 const struct dentry_operations autofs_dentry_operations = {
58 .d_automount = autofs_d_automount,
59 .d_manage = autofs_d_manage,
60 .d_release = autofs_dentry_release,
63 static void autofs_del_active(struct dentry *dentry)
65 struct autofs_sb_info *sbi = autofs_sbi(dentry->d_sb);
66 struct autofs_info *ino;
68 ino = autofs_dentry_ino(dentry);
69 spin_lock(&sbi->lookup_lock);
70 list_del_init(&ino->active);
71 spin_unlock(&sbi->lookup_lock);
74 static int autofs_dir_open(struct inode *inode, struct file *file)
76 struct dentry *dentry = file->f_path.dentry;
77 struct autofs_sb_info *sbi = autofs_sbi(dentry->d_sb);
79 pr_debug("file=%p dentry=%p %pd\n", file, dentry, dentry);
81 if (autofs_oz_mode(sbi))
85 * An empty directory in an autofs file system is always a
86 * mount point. The daemon must have failed to mount this
87 * during lookup so it doesn't exist. This can happen, for
88 * example, if user space returns an incorrect status for a
89 * mount request. Otherwise we're doing a readdir on the
90 * autofs file system so just let the libfs routines handle
93 spin_lock(&sbi->lookup_lock);
94 if (!path_is_mountpoint(&file->f_path) && simple_empty(dentry)) {
95 spin_unlock(&sbi->lookup_lock);
98 spin_unlock(&sbi->lookup_lock);
101 return dcache_dir_open(inode, file);
104 static void autofs_dentry_release(struct dentry *de)
106 struct autofs_info *ino = autofs_dentry_ino(de);
107 struct autofs_sb_info *sbi = autofs_sbi(de->d_sb);
109 pr_debug("releasing %p\n", de);
115 spin_lock(&sbi->lookup_lock);
116 if (!list_empty(&ino->active))
117 list_del(&ino->active);
118 if (!list_empty(&ino->expiring))
119 list_del(&ino->expiring);
120 spin_unlock(&sbi->lookup_lock);
123 autofs_free_ino(ino);
126 static struct dentry *autofs_lookup_active(struct dentry *dentry)
128 struct autofs_sb_info *sbi = autofs_sbi(dentry->d_sb);
129 struct dentry *parent = dentry->d_parent;
130 const struct qstr *name = &dentry->d_name;
131 unsigned int len = name->len;
132 unsigned int hash = name->hash;
133 const unsigned char *str = name->name;
134 struct list_head *p, *head;
136 head = &sbi->active_list;
137 if (list_empty(head))
139 spin_lock(&sbi->lookup_lock);
140 list_for_each(p, head) {
141 struct autofs_info *ino;
142 struct dentry *active;
143 const struct qstr *qstr;
145 ino = list_entry(p, struct autofs_info, active);
146 active = ino->dentry;
148 spin_lock(&active->d_lock);
151 if ((int) d_count(active) <= 0)
154 qstr = &active->d_name;
156 if (active->d_name.hash != hash)
158 if (active->d_parent != parent)
161 if (qstr->len != len)
163 if (memcmp(qstr->name, str, len))
166 if (d_unhashed(active)) {
168 spin_unlock(&active->d_lock);
169 spin_unlock(&sbi->lookup_lock);
173 spin_unlock(&active->d_lock);
175 spin_unlock(&sbi->lookup_lock);
180 static struct dentry *autofs_lookup_expiring(struct dentry *dentry,
183 struct autofs_sb_info *sbi = autofs_sbi(dentry->d_sb);
184 struct dentry *parent = dentry->d_parent;
185 const struct qstr *name = &dentry->d_name;
186 unsigned int len = name->len;
187 unsigned int hash = name->hash;
188 const unsigned char *str = name->name;
189 struct list_head *p, *head;
191 head = &sbi->expiring_list;
192 if (list_empty(head))
194 spin_lock(&sbi->lookup_lock);
195 list_for_each(p, head) {
196 struct autofs_info *ino;
197 struct dentry *expiring;
198 const struct qstr *qstr;
201 spin_unlock(&sbi->lookup_lock);
202 return ERR_PTR(-ECHILD);
205 ino = list_entry(p, struct autofs_info, expiring);
206 expiring = ino->dentry;
208 spin_lock(&expiring->d_lock);
210 /* We've already been dentry_iput or unlinked */
211 if (d_really_is_negative(expiring))
214 qstr = &expiring->d_name;
216 if (expiring->d_name.hash != hash)
218 if (expiring->d_parent != parent)
221 if (qstr->len != len)
223 if (memcmp(qstr->name, str, len))
226 if (d_unhashed(expiring)) {
227 dget_dlock(expiring);
228 spin_unlock(&expiring->d_lock);
229 spin_unlock(&sbi->lookup_lock);
233 spin_unlock(&expiring->d_lock);
235 spin_unlock(&sbi->lookup_lock);
240 static int autofs_mount_wait(const struct path *path, bool rcu_walk)
242 struct autofs_sb_info *sbi = autofs_sbi(path->dentry->d_sb);
243 struct autofs_info *ino = autofs_dentry_ino(path->dentry);
246 if (ino->flags & AUTOFS_INF_PENDING) {
249 pr_debug("waiting for mount name=%pd\n", path->dentry);
250 status = autofs_wait(sbi, path, NFY_MOUNT);
251 pr_debug("mount wait done status=%d\n", status);
252 ino->last_used = jiffies;
255 if (!(sbi->flags & AUTOFS_SBI_STRICTEXPIRE))
256 ino->last_used = jiffies;
260 static int do_expire_wait(const struct path *path, bool rcu_walk)
262 struct dentry *dentry = path->dentry;
263 struct dentry *expiring;
265 expiring = autofs_lookup_expiring(dentry, rcu_walk);
266 if (IS_ERR(expiring))
267 return PTR_ERR(expiring);
269 return autofs_expire_wait(path, rcu_walk);
271 const struct path this = { .mnt = path->mnt, .dentry = expiring };
273 * If we are racing with expire the request might not
274 * be quite complete, but the directory has been removed
275 * so it must have been successful, just wait for it.
277 autofs_expire_wait(&this, 0);
278 autofs_del_expiring(expiring);
284 static struct dentry *autofs_mountpoint_changed(struct path *path)
286 struct dentry *dentry = path->dentry;
287 struct autofs_sb_info *sbi = autofs_sbi(dentry->d_sb);
290 * If this is an indirect mount the dentry could have gone away
291 * as a result of an expire and a new one created.
293 if (autofs_type_indirect(sbi->type) && d_unhashed(dentry)) {
294 struct dentry *parent = dentry->d_parent;
295 struct autofs_info *ino;
298 new = d_lookup(parent, &dentry->d_name);
301 ino = autofs_dentry_ino(new);
302 ino->last_used = jiffies;
309 static struct vfsmount *autofs_d_automount(struct path *path)
311 struct dentry *dentry = path->dentry;
312 struct autofs_sb_info *sbi = autofs_sbi(dentry->d_sb);
313 struct autofs_info *ino = autofs_dentry_ino(dentry);
316 pr_debug("dentry=%p %pd\n", dentry, dentry);
318 /* The daemon never triggers a mount. */
319 if (autofs_oz_mode(sbi))
323 * If an expire request is pending everyone must wait.
324 * If the expire fails we're still mounted so continue
325 * the follow and return. A return of -EAGAIN (which only
326 * happens with indirect mounts) means the expire completed
327 * and the directory was removed, so just go ahead and try
330 status = do_expire_wait(path, 0);
331 if (status && status != -EAGAIN)
334 /* Callback to the daemon to perform the mount or wait */
335 spin_lock(&sbi->fs_lock);
336 if (ino->flags & AUTOFS_INF_PENDING) {
337 spin_unlock(&sbi->fs_lock);
338 status = autofs_mount_wait(path, 0);
340 return ERR_PTR(status);
345 * If the dentry is a symlink it's equivalent to a directory
346 * having path_is_mountpoint() true, so there's no need to call
347 * back to the daemon.
349 if (d_really_is_positive(dentry) && d_is_symlink(dentry)) {
350 spin_unlock(&sbi->fs_lock);
354 if (!path_is_mountpoint(path)) {
356 * It's possible that user space hasn't removed directories
357 * after umounting a rootless multi-mount, although it
358 * should. For v5 path_has_submounts() is sufficient to
359 * handle this because the leaves of the directory tree under
360 * the mount never trigger mounts themselves (they have an
361 * autofs trigger mount mounted on them). But v4 pseudo direct
362 * mounts do need the leaves to trigger mounts. In this case
363 * we have no choice but to use the list_empty() check and
364 * require user space behave.
366 if (sbi->version > 4) {
367 if (path_has_submounts(path)) {
368 spin_unlock(&sbi->fs_lock);
372 if (!simple_empty(dentry)) {
373 spin_unlock(&sbi->fs_lock);
377 ino->flags |= AUTOFS_INF_PENDING;
378 spin_unlock(&sbi->fs_lock);
379 status = autofs_mount_wait(path, 0);
380 spin_lock(&sbi->fs_lock);
381 ino->flags &= ~AUTOFS_INF_PENDING;
383 spin_unlock(&sbi->fs_lock);
384 return ERR_PTR(status);
387 spin_unlock(&sbi->fs_lock);
389 /* Mount succeeded, check if we ended up with a new dentry */
390 dentry = autofs_mountpoint_changed(path);
392 return ERR_PTR(-ENOENT);
397 static int autofs_d_manage(const struct path *path, bool rcu_walk)
399 struct dentry *dentry = path->dentry;
400 struct autofs_sb_info *sbi = autofs_sbi(dentry->d_sb);
401 struct autofs_info *ino = autofs_dentry_ino(dentry);
404 pr_debug("dentry=%p %pd\n", dentry, dentry);
406 /* The daemon never waits. */
407 if (autofs_oz_mode(sbi)) {
408 if (!path_is_mountpoint(path))
413 /* Wait for pending expires */
414 if (do_expire_wait(path, rcu_walk) == -ECHILD)
418 * This dentry may be under construction so wait on mount
421 status = autofs_mount_wait(path, rcu_walk);
426 /* We don't need fs_lock in rcu_walk mode,
427 * just testing 'AUTOFS_INFO_NO_RCU' is enough.
428 * simple_empty() takes a spinlock, so leave it
430 * We only return -EISDIR when certain this isn't
435 if (ino->flags & AUTOFS_INF_WANT_EXPIRE)
437 if (path_is_mountpoint(path))
439 inode = d_inode_rcu(dentry);
440 if (inode && S_ISLNK(inode->i_mode))
442 if (list_empty(&dentry->d_subdirs))
444 if (!simple_empty(dentry))
449 spin_lock(&sbi->fs_lock);
451 * If the dentry has been selected for expire while we slept
452 * on the lock then it might go away. We'll deal with that in
453 * ->d_automount() and wait on a new mount if the expire
454 * succeeds or return here if it doesn't (since there's no
455 * mount to follow with a rootless multi-mount).
457 if (!(ino->flags & AUTOFS_INF_EXPIRING)) {
459 * Any needed mounting has been completed and the path
460 * updated so check if this is a rootless multi-mount so
461 * we can avoid needless calls ->d_automount() and avoid
462 * an incorrect ELOOP error return.
464 if ((!path_is_mountpoint(path) && !simple_empty(dentry)) ||
465 (d_really_is_positive(dentry) && d_is_symlink(dentry)))
468 spin_unlock(&sbi->fs_lock);
473 /* Lookups in the root directory */
474 static struct dentry *autofs_lookup(struct inode *dir,
475 struct dentry *dentry, unsigned int flags)
477 struct autofs_sb_info *sbi;
478 struct autofs_info *ino;
479 struct dentry *active;
481 pr_debug("name = %pd\n", dentry);
483 /* File name too long to exist */
484 if (dentry->d_name.len > NAME_MAX)
485 return ERR_PTR(-ENAMETOOLONG);
487 sbi = autofs_sbi(dir->i_sb);
489 pr_debug("pid = %u, pgrp = %u, catatonic = %d, oz_mode = %d\n",
490 current->pid, task_pgrp_nr(current),
491 sbi->flags & AUTOFS_SBI_CATATONIC,
492 autofs_oz_mode(sbi));
494 active = autofs_lookup_active(dentry);
499 * A dentry that is not within the root can never trigger a
500 * mount operation, unless the directory already exists, so we
501 * can return fail immediately. The daemon however does need
502 * to create directories within the file system.
504 if (!autofs_oz_mode(sbi) && !IS_ROOT(dentry->d_parent))
505 return ERR_PTR(-ENOENT);
507 ino = autofs_new_ino(sbi);
509 return ERR_PTR(-ENOMEM);
511 spin_lock(&sbi->lookup_lock);
512 spin_lock(&dentry->d_lock);
513 /* Mark entries in the root as mount triggers */
514 if (IS_ROOT(dentry->d_parent) &&
515 autofs_type_indirect(sbi->type))
516 __managed_dentry_set_managed(dentry);
517 dentry->d_fsdata = ino;
518 ino->dentry = dentry;
520 list_add(&ino->active, &sbi->active_list);
521 spin_unlock(&sbi->lookup_lock);
522 spin_unlock(&dentry->d_lock);
527 static int autofs_dir_symlink(struct inode *dir,
528 struct dentry *dentry,
531 struct autofs_sb_info *sbi = autofs_sbi(dir->i_sb);
532 struct autofs_info *ino = autofs_dentry_ino(dentry);
533 struct autofs_info *p_ino;
535 size_t size = strlen(symname);
538 pr_debug("%s <- %pd\n", symname, dentry);
540 if (!autofs_oz_mode(sbi))
543 /* autofs_oz_mode() needs to allow path walks when the
544 * autofs mount is catatonic but the state of an autofs
545 * file system needs to be preserved over restarts.
547 if (sbi->flags & AUTOFS_SBI_CATATONIC)
552 autofs_clean_ino(ino);
554 autofs_del_active(dentry);
556 cp = kmalloc(size + 1, GFP_KERNEL);
562 inode = autofs_get_inode(dir->i_sb, S_IFLNK | 0555);
567 inode->i_private = cp;
568 inode->i_size = size;
569 d_add(dentry, inode);
572 atomic_inc(&ino->count);
573 p_ino = autofs_dentry_ino(dentry->d_parent);
574 if (p_ino && !IS_ROOT(dentry))
575 atomic_inc(&p_ino->count);
577 dir->i_mtime = current_time(dir);
585 * Normal filesystems would do a "d_delete()" to tell the VFS dcache
586 * that the file no longer exists. However, doing that means that the
587 * VFS layer can turn the dentry into a negative dentry. We don't want
588 * this, because the unlink is probably the result of an expire.
589 * We simply d_drop it and add it to a expiring list in the super block,
590 * which allows the dentry lookup to check for an incomplete expire.
592 * If a process is blocked on the dentry waiting for the expire to finish,
593 * it will invalidate the dentry and try to mount with a new one.
595 * Also see autofs_dir_rmdir()..
597 static int autofs_dir_unlink(struct inode *dir, struct dentry *dentry)
599 struct autofs_sb_info *sbi = autofs_sbi(dir->i_sb);
600 struct autofs_info *ino = autofs_dentry_ino(dentry);
601 struct autofs_info *p_ino;
603 if (!autofs_oz_mode(sbi))
606 /* autofs_oz_mode() needs to allow path walks when the
607 * autofs mount is catatonic but the state of an autofs
608 * file system needs to be preserved over restarts.
610 if (sbi->flags & AUTOFS_SBI_CATATONIC)
613 if (atomic_dec_and_test(&ino->count)) {
614 p_ino = autofs_dentry_ino(dentry->d_parent);
615 if (p_ino && !IS_ROOT(dentry))
616 atomic_dec(&p_ino->count);
620 d_inode(dentry)->i_size = 0;
621 clear_nlink(d_inode(dentry));
623 dir->i_mtime = current_time(dir);
625 spin_lock(&sbi->lookup_lock);
626 __autofs_add_expiring(dentry);
628 spin_unlock(&sbi->lookup_lock);
634 * Version 4 of autofs provides a pseudo direct mount implementation
635 * that relies on directories at the leaves of a directory tree under
636 * an indirect mount to trigger mounts. To allow for this we need to
637 * set the DMANAGED_AUTOMOUNT and DMANAGED_TRANSIT flags on the leaves
638 * of the directory tree. There is no need to clear the automount flag
639 * following a mount or restore it after an expire because these mounts
640 * are always covered. However, it is necessary to ensure that these
641 * flags are clear on non-empty directories to avoid unnecessary calls
644 static void autofs_set_leaf_automount_flags(struct dentry *dentry)
646 struct dentry *parent;
648 /* root and dentrys in the root are already handled */
649 if (IS_ROOT(dentry->d_parent))
652 managed_dentry_set_managed(dentry);
654 parent = dentry->d_parent;
655 /* only consider parents below dentrys in the root */
656 if (IS_ROOT(parent->d_parent))
658 managed_dentry_clear_managed(parent);
661 static void autofs_clear_leaf_automount_flags(struct dentry *dentry)
663 struct dentry *parent;
665 /* flags for dentrys in the root are handled elsewhere */
666 if (IS_ROOT(dentry->d_parent))
669 managed_dentry_clear_managed(dentry);
671 parent = dentry->d_parent;
672 /* only consider parents below dentrys in the root */
673 if (IS_ROOT(parent->d_parent))
675 if (atomic_read(&autofs_dentry_ino(parent)->count) == 2)
676 managed_dentry_set_managed(parent);
679 static int autofs_dir_rmdir(struct inode *dir, struct dentry *dentry)
681 struct autofs_sb_info *sbi = autofs_sbi(dir->i_sb);
682 struct autofs_info *ino = autofs_dentry_ino(dentry);
683 struct autofs_info *p_ino;
685 pr_debug("dentry %p, removing %pd\n", dentry, dentry);
687 if (!autofs_oz_mode(sbi))
690 /* autofs_oz_mode() needs to allow path walks when the
691 * autofs mount is catatonic but the state of an autofs
692 * file system needs to be preserved over restarts.
694 if (sbi->flags & AUTOFS_SBI_CATATONIC)
697 spin_lock(&sbi->lookup_lock);
698 if (!simple_empty(dentry)) {
699 spin_unlock(&sbi->lookup_lock);
702 __autofs_add_expiring(dentry);
704 spin_unlock(&sbi->lookup_lock);
706 if (sbi->version < 5)
707 autofs_clear_leaf_automount_flags(dentry);
709 if (atomic_dec_and_test(&ino->count)) {
710 p_ino = autofs_dentry_ino(dentry->d_parent);
711 if (p_ino && dentry->d_parent != dentry)
712 atomic_dec(&p_ino->count);
715 d_inode(dentry)->i_size = 0;
716 clear_nlink(d_inode(dentry));
724 static int autofs_dir_mkdir(struct inode *dir,
725 struct dentry *dentry, umode_t mode)
727 struct autofs_sb_info *sbi = autofs_sbi(dir->i_sb);
728 struct autofs_info *ino = autofs_dentry_ino(dentry);
729 struct autofs_info *p_ino;
732 if (!autofs_oz_mode(sbi))
735 /* autofs_oz_mode() needs to allow path walks when the
736 * autofs mount is catatonic but the state of an autofs
737 * file system needs to be preserved over restarts.
739 if (sbi->flags & AUTOFS_SBI_CATATONIC)
742 pr_debug("dentry %p, creating %pd\n", dentry, dentry);
746 autofs_clean_ino(ino);
748 autofs_del_active(dentry);
750 inode = autofs_get_inode(dir->i_sb, S_IFDIR | mode);
753 d_add(dentry, inode);
755 if (sbi->version < 5)
756 autofs_set_leaf_automount_flags(dentry);
759 atomic_inc(&ino->count);
760 p_ino = autofs_dentry_ino(dentry->d_parent);
761 if (p_ino && !IS_ROOT(dentry))
762 atomic_inc(&p_ino->count);
764 dir->i_mtime = current_time(dir);
769 /* Get/set timeout ioctl() operation */
771 static inline int autofs_compat_get_set_timeout(struct autofs_sb_info *sbi,
772 compat_ulong_t __user *p)
774 unsigned long ntimeout;
777 rv = get_user(ntimeout, p);
781 rv = put_user(sbi->exp_timeout/HZ, p);
785 if (ntimeout > UINT_MAX/HZ)
786 sbi->exp_timeout = 0;
788 sbi->exp_timeout = ntimeout * HZ;
796 static inline int autofs_get_set_timeout(struct autofs_sb_info *sbi,
797 unsigned long __user *p)
799 unsigned long ntimeout;
802 rv = get_user(ntimeout, p);
806 rv = put_user(sbi->exp_timeout/HZ, p);
810 if (ntimeout > ULONG_MAX/HZ)
811 sbi->exp_timeout = 0;
813 sbi->exp_timeout = ntimeout * HZ;
820 /* Return protocol version */
821 static inline int autofs_get_protover(struct autofs_sb_info *sbi,
824 return put_user(sbi->version, p);
827 /* Return protocol sub version */
828 static inline int autofs_get_protosubver(struct autofs_sb_info *sbi,
831 return put_user(sbi->sub_version, p);
835 * Tells the daemon whether it can umount the autofs mount.
837 static inline int autofs_ask_umount(struct vfsmount *mnt, int __user *p)
844 pr_debug("may umount %d\n", status);
846 status = put_user(status, p);
851 /* Identify autofs_dentries - this is so we can tell if there's
852 * an extra dentry refcount or not. We only hold a refcount on the
853 * dentry if its non-negative (ie, d_inode != NULL)
855 int is_autofs_dentry(struct dentry *dentry)
857 return dentry && d_really_is_positive(dentry) &&
858 dentry->d_op == &autofs_dentry_operations &&
859 dentry->d_fsdata != NULL;
863 * ioctl()'s on the root directory is the chief method for the daemon to
864 * generate kernel reactions
866 static int autofs_root_ioctl_unlocked(struct inode *inode, struct file *filp,
867 unsigned int cmd, unsigned long arg)
869 struct autofs_sb_info *sbi = autofs_sbi(inode->i_sb);
870 void __user *p = (void __user *)arg;
872 pr_debug("cmd = 0x%08x, arg = 0x%08lx, sbi = %p, pgrp = %u\n",
873 cmd, arg, sbi, task_pgrp_nr(current));
875 if (_IOC_TYPE(cmd) != _IOC_TYPE(AUTOFS_IOC_FIRST) ||
876 _IOC_NR(cmd) - _IOC_NR(AUTOFS_IOC_FIRST) >= AUTOFS_IOC_COUNT)
879 if (!autofs_oz_mode(sbi) && !capable(CAP_SYS_ADMIN))
883 case AUTOFS_IOC_READY: /* Wait queue: go ahead and retry */
884 return autofs_wait_release(sbi, (autofs_wqt_t) arg, 0);
885 case AUTOFS_IOC_FAIL: /* Wait queue: fail with ENOENT */
886 return autofs_wait_release(sbi, (autofs_wqt_t) arg, -ENOENT);
887 case AUTOFS_IOC_CATATONIC: /* Enter catatonic mode (daemon shutdown) */
888 autofs_catatonic_mode(sbi);
890 case AUTOFS_IOC_PROTOVER: /* Get protocol version */
891 return autofs_get_protover(sbi, p);
892 case AUTOFS_IOC_PROTOSUBVER: /* Get protocol sub version */
893 return autofs_get_protosubver(sbi, p);
894 case AUTOFS_IOC_SETTIMEOUT:
895 return autofs_get_set_timeout(sbi, p);
897 case AUTOFS_IOC_SETTIMEOUT32:
898 return autofs_compat_get_set_timeout(sbi, p);
901 case AUTOFS_IOC_ASKUMOUNT:
902 return autofs_ask_umount(filp->f_path.mnt, p);
904 /* return a single thing to expire */
905 case AUTOFS_IOC_EXPIRE:
906 return autofs_expire_run(inode->i_sb, filp->f_path.mnt, sbi, p);
907 /* same as above, but can send multiple expires through pipe */
908 case AUTOFS_IOC_EXPIRE_MULTI:
909 return autofs_expire_multi(inode->i_sb,
910 filp->f_path.mnt, sbi, p);
917 static long autofs_root_ioctl(struct file *filp,
918 unsigned int cmd, unsigned long arg)
920 struct inode *inode = file_inode(filp);
922 return autofs_root_ioctl_unlocked(inode, filp, cmd, arg);
926 static long autofs_root_compat_ioctl(struct file *filp,
927 unsigned int cmd, unsigned long arg)
929 struct inode *inode = file_inode(filp);
932 if (cmd == AUTOFS_IOC_READY || cmd == AUTOFS_IOC_FAIL)
933 ret = autofs_root_ioctl_unlocked(inode, filp, cmd, arg);
935 ret = autofs_root_ioctl_unlocked(inode, filp, cmd,
936 (unsigned long) compat_ptr(arg));