16 static int autofs_dir_symlink(struct inode *, struct dentry *, const char *);
17 static int autofs_dir_unlink(struct inode *, struct dentry *);
18 static int autofs_dir_rmdir(struct inode *, struct dentry *);
19 static int autofs_dir_mkdir(struct inode *, 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 *);
66 static void autofs_add_active(struct dentry *dentry)  in autofs_add_active()  argument
68 	struct autofs_sb_info *sbi = autofs_sbi(dentry->d_sb);  in autofs_add_active()
71 	ino = autofs_dentry_ino(dentry);  in autofs_add_active()
83 static void autofs_del_active(struct dentry *dentry)  in autofs_del_active()  argument
85 	struct autofs_sb_info *sbi = autofs_sbi(dentry->d_sb);  in autofs_del_active()
88 	ino = autofs_dentry_ino(dentry);  in autofs_del_active()
102 	struct dentry *dentry = file->f_path.dentry;  in autofs_dir_open()  local
103 	struct autofs_sb_info *sbi = autofs_sbi(dentry->d_sb);  in autofs_dir_open()
105 	pr_debug("file=%p dentry=%p %pd\n", file, dentry, dentry);  in autofs_dir_open()
120 	if (!path_is_mountpoint(&file->f_path) && simple_empty(dentry)) {  in autofs_dir_open()
130 static void autofs_dentry_release(struct dentry *de)  in autofs_dentry_release()
152 static struct dentry *autofs_lookup_active(struct dentry *dentry)  in autofs_lookup_active()  argument
154 	struct autofs_sb_info *sbi = autofs_sbi(dentry->d_sb);  in autofs_lookup_active()
155 	struct dentry *parent = dentry->d_parent;  in autofs_lookup_active()
156 	const struct qstr *name = &dentry->d_name;  in autofs_lookup_active()
168 		struct dentry *active;  in autofs_lookup_active()
172 		active = ino->dentry;  in autofs_lookup_active()
206 static struct dentry *autofs_lookup_expiring(struct dentry *dentry,  in autofs_lookup_expiring()  argument
209 	struct autofs_sb_info *sbi = autofs_sbi(dentry->d_sb);  in autofs_lookup_expiring()
210 	struct dentry *parent = dentry->d_parent;  in autofs_lookup_expiring()
211 	const struct qstr *name = &dentry->d_name;  in autofs_lookup_expiring()
223 		struct dentry *expiring;  in autofs_lookup_expiring()
232 		expiring = ino->dentry;  in autofs_lookup_expiring()
268 	struct autofs_sb_info *sbi = autofs_sbi(path->dentry->d_sb);  in autofs_mount_wait()
269 	struct autofs_info *ino = autofs_dentry_ino(path->dentry);  in autofs_mount_wait()
275 		pr_debug("waiting for mount name=%pd\n", path->dentry);  in autofs_mount_wait()
285 	struct dentry *dentry = path->dentry;  in do_expire_wait()  local
286 	struct dentry *expiring;  in do_expire_wait()
288 	expiring = autofs_lookup_expiring(dentry, rcu_walk);  in do_expire_wait()
294 		const struct path this = { .mnt = path->mnt, .dentry = expiring };  in do_expire_wait()
307 static struct dentry *autofs_mountpoint_changed(struct path *path)  in autofs_mountpoint_changed()
309 	struct dentry *dentry = path->dentry;  in autofs_mountpoint_changed()  local
310 	struct autofs_sb_info *sbi = autofs_sbi(dentry->d_sb);  in autofs_mountpoint_changed()
316 	if (autofs_type_indirect(sbi->type) && d_unhashed(dentry)) {  in autofs_mountpoint_changed()
317 		struct dentry *parent = dentry->d_parent;  in autofs_mountpoint_changed()
319 		struct dentry *new;  in autofs_mountpoint_changed()
321 		new = d_lookup(parent, &dentry->d_name);  in autofs_mountpoint_changed()
326 		dput(path->dentry);  in autofs_mountpoint_changed()
327 		path->dentry = new;  in autofs_mountpoint_changed()
329 	return path->dentry;  in autofs_mountpoint_changed()
334 	struct dentry *dentry = path->dentry;  in autofs_d_automount()  local
335 	struct autofs_sb_info *sbi = autofs_sbi(dentry->d_sb);  in autofs_d_automount()
336 	struct autofs_info *ino = autofs_dentry_ino(dentry);  in autofs_d_automount()
339 	pr_debug("dentry=%p %pd\n", dentry, dentry);  in autofs_d_automount()
372 	if (d_really_is_positive(dentry) && d_is_symlink(dentry)) {  in autofs_d_automount()
395 			if (!simple_empty(dentry)) {  in autofs_d_automount()
413 	dentry = autofs_mountpoint_changed(path);  in autofs_d_automount()
414 	if (!dentry)  in autofs_d_automount()
422 	struct dentry *dentry = path->dentry;  in autofs_d_manage()  local
423 	struct autofs_sb_info *sbi = autofs_sbi(dentry->d_sb);  in autofs_d_manage()
424 	struct autofs_info *ino = autofs_dentry_ino(dentry);  in autofs_d_manage()
427 	pr_debug("dentry=%p %pd\n", dentry, dentry);  in autofs_d_manage()
462 		inode = d_inode_rcu(dentry);  in autofs_d_manage()
465 		if (list_empty(&dentry->d_subdirs))  in autofs_d_manage()
467 		if (!simple_empty(dentry))  in autofs_d_manage()
487 		if ((!path_is_mountpoint(path) && !simple_empty(dentry)) ||  in autofs_d_manage()
488 		    (d_really_is_positive(dentry) && d_is_symlink(dentry)))  in autofs_d_manage()
497 static struct dentry *autofs_lookup(struct inode *dir,  in autofs_lookup()
498 				    struct dentry *dentry, unsigned int flags)  in autofs_lookup()  argument
502 	struct dentry *active;  in autofs_lookup()
504 	pr_debug("name = %pd\n", dentry);  in autofs_lookup()
507 	if (dentry->d_name.len > NAME_MAX)  in autofs_lookup()
516 	active = autofs_lookup_active(dentry);  in autofs_lookup()
526 		if (!autofs_oz_mode(sbi) && !IS_ROOT(dentry->d_parent))  in autofs_lookup()
530 		if (IS_ROOT(dentry->d_parent) &&  in autofs_lookup()
532 			__managed_dentry_set_managed(dentry);  in autofs_lookup()
538 		dentry->d_fsdata = ino;  in autofs_lookup()
539 		ino->dentry = dentry;  in autofs_lookup()
541 		autofs_add_active(dentry);  in autofs_lookup()
547 			       struct dentry *dentry,  in autofs_dir_symlink()  argument
551 	struct autofs_info *ino = autofs_dentry_ino(dentry);  in autofs_dir_symlink()
557 	pr_debug("%s <- %pd\n", symname, dentry);  in autofs_dir_symlink()
573 	autofs_del_active(dentry);  in autofs_dir_symlink()
588 	d_add(dentry, inode);  in autofs_dir_symlink()
590 	dget(dentry);  in autofs_dir_symlink()
592 	p_ino = autofs_dentry_ino(dentry->d_parent);  in autofs_dir_symlink()
593 	if (p_ino && !IS_ROOT(dentry))  in autofs_dir_symlink()
616 static int autofs_dir_unlink(struct inode *dir, struct dentry *dentry)  in autofs_dir_unlink()  argument
619 	struct autofs_info *ino = autofs_dentry_ino(dentry);  in autofs_dir_unlink()
633 		p_ino = autofs_dentry_ino(dentry->d_parent);  in autofs_dir_unlink()
634 		if (p_ino && !IS_ROOT(dentry))  in autofs_dir_unlink()
637 	dput(ino->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
683 	struct dentry *parent;  in autofs_clear_leaf_automount_flags()
686 	if (IS_ROOT(dentry->d_parent))  in autofs_clear_leaf_automount_flags()
689 	managed_dentry_clear_managed(dentry);  in autofs_clear_leaf_automount_flags()
691 	parent = dentry->d_parent;  in autofs_clear_leaf_automount_flags()
695 	d_child = &dentry->d_child;  in autofs_clear_leaf_automount_flags()
702 static int autofs_dir_rmdir(struct inode *dir, struct dentry *dentry)  in autofs_dir_rmdir()  argument
705 	struct autofs_info *ino = autofs_dentry_ino(dentry);  in autofs_dir_rmdir()
708 	pr_debug("dentry %p, removing %pd\n", dentry, dentry);  in autofs_dir_rmdir()
721 	if (!simple_empty(dentry)) {  in autofs_dir_rmdir()
725 	__autofs_add_expiring(dentry);  in autofs_dir_rmdir()
726 	d_drop(dentry);  in autofs_dir_rmdir()
730 		autofs_clear_leaf_automount_flags(dentry);  in autofs_dir_rmdir()
733 		p_ino = autofs_dentry_ino(dentry->d_parent);  in autofs_dir_rmdir()
734 		if (p_ino && dentry->d_parent != dentry)  in autofs_dir_rmdir()
737 	dput(ino->dentry);  in autofs_dir_rmdir()
738 	d_inode(dentry)->i_size = 0;  in autofs_dir_rmdir()
739 	clear_nlink(d_inode(dentry));  in autofs_dir_rmdir()
748 			    struct dentry *dentry, umode_t mode)  in autofs_dir_mkdir()  argument
751 	struct autofs_info *ino = autofs_dentry_ino(dentry);  in autofs_dir_mkdir()
765 	pr_debug("dentry %p, creating %pd\n", dentry, dentry);  in autofs_dir_mkdir()
771 	autofs_del_active(dentry);  in autofs_dir_mkdir()
776 	d_add(dentry, inode);  in autofs_dir_mkdir()
779 		autofs_set_leaf_automount_flags(dentry);  in autofs_dir_mkdir()
781 	dget(dentry);  in autofs_dir_mkdir()
783 	p_ino = autofs_dentry_ino(dentry->d_parent);  in autofs_dir_mkdir()
784 	if (p_ino && !IS_ROOT(dentry))  in autofs_dir_mkdir()
878 int is_autofs_dentry(struct dentry *dentry)  in is_autofs_dentry()  argument
880 	return dentry && d_really_is_positive(dentry) &&  in is_autofs_dentry()
881 		dentry->d_op == &autofs_dentry_operations &&  in is_autofs_dentry()
882 		dentry->d_fsdata != NULL;  in is_autofs_dentry()