15 			      struct dentry *, const char *);
16 static int autofs_dir_unlink(struct inode *, struct dentry *);
17 static int autofs_dir_rmdir(struct inode *, struct dentry *);
18 static struct dentry *autofs_dir_mkdir(struct mnt_idmap *, struct inode *,
19 				       struct dentry *, umode_t);
26 static struct dentry *autofs_lookup(struct inode *,
27 				    struct dentry *, unsigned int);
30 static void autofs_dentry_release(struct dentry *);
67 static void autofs_del_active(struct dentry *dentry)  in autofs_del_active()  argument
69 	struct autofs_sb_info *sbi = autofs_sbi(dentry->d_sb);  in autofs_del_active()
72 	ino = autofs_dentry_ino(dentry);  in autofs_del_active()
80 	struct dentry *dentry = file->f_path.dentry;  in autofs_dir_open()  local
81 	struct autofs_sb_info *sbi = autofs_sbi(dentry->d_sb);  in autofs_dir_open()
82 	struct autofs_info *ino = autofs_dentry_ino(dentry);  in autofs_dir_open()
84 	pr_debug("file=%p dentry=%p %pd\n", file, dentry, dentry);  in autofs_dir_open()
109 static void autofs_dentry_release(struct dentry *de)  in autofs_dentry_release()
131 static struct dentry *autofs_lookup_active(struct dentry *dentry)  in autofs_lookup_active()  argument
133 	struct autofs_sb_info *sbi = autofs_sbi(dentry->d_sb);  in autofs_lookup_active()
134 	struct dentry *parent = dentry->d_parent;  in autofs_lookup_active()
135 	const struct qstr *name = &dentry->d_name;  in autofs_lookup_active()
147 		struct dentry *active;  in autofs_lookup_active()
151 		active = ino->dentry;  in autofs_lookup_active()
185 static struct dentry *autofs_lookup_expiring(struct dentry *dentry,  in autofs_lookup_expiring()  argument
188 	struct autofs_sb_info *sbi = autofs_sbi(dentry->d_sb);  in autofs_lookup_expiring()
189 	struct dentry *parent = dentry->d_parent;  in autofs_lookup_expiring()
190 	const struct qstr *name = &dentry->d_name;  in autofs_lookup_expiring()
202 		struct dentry *expiring;  in autofs_lookup_expiring()
211 		expiring = ino->dentry;  in autofs_lookup_expiring()
247 	struct autofs_sb_info *sbi = autofs_sbi(path->dentry->d_sb);  in autofs_mount_wait()
248 	struct autofs_info *ino = autofs_dentry_ino(path->dentry);  in autofs_mount_wait()
254 		pr_debug("waiting for mount name=%pd\n", path->dentry);  in autofs_mount_wait()
267 	struct dentry *dentry = path->dentry;  in do_expire_wait()  local
268 	struct dentry *expiring;  in do_expire_wait()
270 	expiring = autofs_lookup_expiring(dentry, rcu_walk);  in do_expire_wait()
276 		const struct path this = { .mnt = path->mnt, .dentry = expiring };  in do_expire_wait()
289 static struct dentry *autofs_mountpoint_changed(struct path *path)  in autofs_mountpoint_changed()
291 	struct dentry *dentry = path->dentry;  in autofs_mountpoint_changed()  local
292 	struct autofs_sb_info *sbi = autofs_sbi(dentry->d_sb);  in autofs_mountpoint_changed()
315 	if (autofs_type_indirect(sbi->type) && d_unhashed(dentry)) {  in autofs_mountpoint_changed()
316 		struct dentry *parent = dentry->d_parent;  in autofs_mountpoint_changed()
318 		struct dentry *new;  in autofs_mountpoint_changed()
320 		new = d_lookup(parent, &dentry->d_name);  in autofs_mountpoint_changed()
325 		dput(path->dentry);  in autofs_mountpoint_changed()
326 		path->dentry = new;  in autofs_mountpoint_changed()
328 	return path->dentry;  in autofs_mountpoint_changed()
333 	struct dentry *dentry = path->dentry;  in autofs_d_automount()  local
334 	struct autofs_sb_info *sbi = autofs_sbi(dentry->d_sb);  in autofs_d_automount()
335 	struct autofs_info *ino = autofs_dentry_ino(dentry);  in autofs_d_automount()
338 	pr_debug("dentry=%p %pd\n", dentry, dentry);  in autofs_d_automount()
379 	if (d_really_is_positive(dentry) && d_is_symlink(dentry)) {  in autofs_d_automount()
420 	dentry = autofs_mountpoint_changed(path);  in autofs_d_automount()
421 	if (!dentry)  in autofs_d_automount()
429 	struct dentry *dentry = path->dentry;  in autofs_d_manage()  local
430 	struct autofs_sb_info *sbi = autofs_sbi(dentry->d_sb);  in autofs_d_manage()
431 	struct autofs_info *ino = autofs_dentry_ino(dentry);  in autofs_d_manage()
434 	pr_debug("dentry=%p %pd\n", dentry, dentry);  in autofs_d_manage()
468 		inode = d_inode_rcu(dentry);  in autofs_d_manage()
492 		    (d_really_is_positive(dentry) && d_is_symlink(dentry)))  in autofs_d_manage()
501 static struct dentry *autofs_lookup(struct inode *dir,  in autofs_lookup()
502 				    struct dentry *dentry, unsigned int flags)  in autofs_lookup()  argument
506 	struct dentry *active;  in autofs_lookup()
508 	pr_debug("name = %pd\n", dentry);  in autofs_lookup()
511 	if (dentry->d_name.len > NAME_MAX)  in autofs_lookup()
521 	active = autofs_lookup_active(dentry);  in autofs_lookup()
531 		if (!autofs_oz_mode(sbi) && !IS_ROOT(dentry->d_parent))  in autofs_lookup()
539 		spin_lock(&dentry->d_lock);  in autofs_lookup()
541 		if (IS_ROOT(dentry->d_parent) &&  in autofs_lookup()
543 			__managed_dentry_set_managed(dentry);  in autofs_lookup()
544 		dentry->d_fsdata = ino;  in autofs_lookup()
545 		ino->dentry = dentry;  in autofs_lookup()
549 		spin_unlock(&dentry->d_lock);  in autofs_lookup()
575 			      struct inode *dir, struct dentry *dentry,  in autofs_dir_symlink()  argument
578 	struct autofs_info *ino = autofs_dentry_ino(dentry);  in autofs_dir_symlink()
584 	pr_debug("%s <- %pd\n", symname, dentry);  in autofs_dir_symlink()
590 	autofs_del_active(dentry);  in autofs_dir_symlink()
606 	d_make_persistent(dentry, inode);  in autofs_dir_symlink()
607 	p_ino = autofs_dentry_ino(dentry->d_parent);  in autofs_dir_symlink()
630 static int autofs_dir_unlink(struct inode *dir, struct dentry *dentry)  in autofs_dir_unlink()  argument
635 	p_ino = autofs_dentry_ino(dentry->d_parent);  in autofs_dir_unlink()
637 	d_make_discardable(dentry);  in autofs_dir_unlink()
639 	d_inode(dentry)->i_size = 0;  in autofs_dir_unlink()
640 	clear_nlink(d_inode(dentry));  in autofs_dir_unlink()
645 	__autofs_add_expiring(dentry);  in autofs_dir_unlink()
646 	d_drop(dentry);  in autofs_dir_unlink()
663 static void autofs_set_leaf_automount_flags(struct dentry *dentry)  in autofs_set_leaf_automount_flags()  argument
665 	struct dentry *parent;  in autofs_set_leaf_automount_flags()
668 	if (IS_ROOT(dentry->d_parent))  in autofs_set_leaf_automount_flags()
671 	managed_dentry_set_managed(dentry);  in autofs_set_leaf_automount_flags()
673 	parent = dentry->d_parent;  in autofs_set_leaf_automount_flags()
680 static void autofs_clear_leaf_automount_flags(struct dentry *dentry)  in autofs_clear_leaf_automount_flags()  argument
682 	struct dentry *parent;  in autofs_clear_leaf_automount_flags()
685 	if (IS_ROOT(dentry->d_parent))  in autofs_clear_leaf_automount_flags()
688 	managed_dentry_clear_managed(dentry);  in autofs_clear_leaf_automount_flags()
690 	parent = dentry->d_parent;  in autofs_clear_leaf_automount_flags()
698 static int autofs_dir_rmdir(struct inode *dir, struct dentry *dentry)  in autofs_dir_rmdir()  argument
701 	struct autofs_info *ino = autofs_dentry_ino(dentry);  in autofs_dir_rmdir()
704 	pr_debug("dentry %p, removing %pd\n", dentry, dentry);  in autofs_dir_rmdir()
710 	__autofs_add_expiring(dentry);  in autofs_dir_rmdir()
711 	d_drop(dentry);  in autofs_dir_rmdir()
715 		autofs_clear_leaf_automount_flags(dentry);  in autofs_dir_rmdir()
717 	p_ino = autofs_dentry_ino(dentry->d_parent);  in autofs_dir_rmdir()
719 	d_make_discardable(dentry);  in autofs_dir_rmdir()
720 	d_inode(dentry)->i_size = 0;  in autofs_dir_rmdir()
721 	clear_nlink(d_inode(dentry));  in autofs_dir_rmdir()
729 static struct dentry *autofs_dir_mkdir(struct mnt_idmap *idmap,  in autofs_dir_mkdir()
730 				       struct inode *dir, struct dentry *dentry,  in autofs_dir_mkdir()  argument
734 	struct autofs_info *ino = autofs_dentry_ino(dentry);  in autofs_dir_mkdir()
738 	pr_debug("dentry %p, creating %pd\n", dentry, dentry);  in autofs_dir_mkdir()
744 	autofs_del_active(dentry);  in autofs_dir_mkdir()
751 		autofs_set_leaf_automount_flags(dentry);  in autofs_dir_mkdir()
753 	d_make_persistent(dentry, inode);  in autofs_dir_mkdir()
754 	p_ino = autofs_dentry_ino(dentry->d_parent);  in autofs_dir_mkdir()
848 int is_autofs_dentry(struct dentry *dentry)  in is_autofs_dentry()  argument
850 	return dentry && d_really_is_positive(dentry) &&  in is_autofs_dentry()
851 		dentry->d_op == &autofs_dentry_operations &&  in is_autofs_dentry()
852 		dentry->d_fsdata != NULL;  in is_autofs_dentry()