20 static inline int autofs4_can_expire(struct dentry *dentry,  in autofs4_can_expire()  argument
23 	struct autofs_info *ino = autofs4_dentry_ino(dentry);  in autofs4_can_expire()
38 static int autofs4_mount_busy(struct vfsmount *mnt, struct dentry *dentry)  in autofs4_mount_busy()  argument
40 	struct dentry *top = dentry;  in autofs4_mount_busy()
41 	struct path path = {.mnt = mnt, .dentry = dentry};  in autofs4_mount_busy()
44 	DPRINTK("dentry %p %pd", dentry, dentry);  in autofs4_mount_busy()
51 	if (is_autofs4_dentry(path.dentry)) {  in autofs4_mount_busy()
52 		struct autofs_sb_info *sbi = autofs4_sbi(path.dentry->d_sb);  in autofs4_mount_busy()
76 static struct dentry *get_next_positive_subdir(struct dentry *prev,  in get_next_positive_subdir()
77 						struct dentry *root)  in get_next_positive_subdir()
81 	struct dentry *q;  in get_next_positive_subdir()
101 	q = list_entry(next, struct dentry, d_child);  in get_next_positive_subdir()
123 static struct dentry *get_next_positive_dentry(struct dentry *prev,  in get_next_positive_dentry()
124 						struct dentry *root)  in get_next_positive_dentry()
128 	struct dentry *p, *ret;  in get_next_positive_dentry()
141 			struct dentry *parent;  in get_next_positive_dentry()
163 	ret = list_entry(next, struct dentry, d_child);  in get_next_positive_dentry()
190 				struct dentry *top,  in autofs4_direct_busy()
215 	       		     struct dentry *top,  in autofs4_tree_busy()
220 	struct dentry *p;  in autofs4_tree_busy()
269 static struct dentry *autofs4_check_leaves(struct vfsmount *mnt,  in autofs4_check_leaves()
270 					   struct dentry *parent,  in autofs4_check_leaves()
274 	struct dentry *p;  in autofs4_check_leaves()
296 struct dentry *autofs4_expire_direct(struct super_block *sb,  in autofs4_expire_direct()
302 	struct dentry *root = dget(sb->s_root);  in autofs4_expire_direct()
344 static struct dentry *should_expire(struct dentry *dentry,  in should_expire()  argument
351 	struct autofs_info *ino = autofs4_dentry_ino(dentry);  in should_expire()
364 	if (d_mountpoint(dentry)) {  in should_expire()
365 		DPRINTK("checking mountpoint %p %pd", dentry, dentry);  in should_expire()
368 		if (autofs4_mount_busy(mnt, dentry))  in should_expire()
372 		if (autofs4_can_expire(dentry, timeout, do_now))  in should_expire()
373 			return dentry;  in should_expire()
377 	if (d_really_is_positive(dentry) && d_is_symlink(dentry)) {  in should_expire()
378 		DPRINTK("checking symlink %p %pd", dentry, dentry);  in should_expire()
383 		if (autofs4_can_expire(dentry, timeout, do_now))  in should_expire()
384 			return dentry;  in should_expire()
388 	if (simple_empty(dentry))  in should_expire()
395 		if (d_count(dentry) > ino_count)  in should_expire()
398 		if (!autofs4_tree_busy(mnt, dentry, timeout, do_now))  in should_expire()
399 			return dentry;  in should_expire()
406 		struct dentry *expired;  in should_expire()
408 		if (d_count(dentry) > ino_count)  in should_expire()
411 		expired = autofs4_check_leaves(mnt, dentry, timeout, do_now);  in should_expire()
413 			if (expired == dentry)  in should_expire()
414 				dput(dentry);  in should_expire()
426 struct dentry *autofs4_expire_indirect(struct super_block *sb,  in autofs4_expire_indirect()
432 	struct dentry *root = sb->s_root;  in autofs4_expire_indirect()
433 	struct dentry *dentry;  in autofs4_expire_indirect()  local
434 	struct dentry *expired;  in autofs4_expire_indirect()
443 	dentry = NULL;  in autofs4_expire_indirect()
444 	while ((dentry = get_next_positive_subdir(dentry, root))) {  in autofs4_expire_indirect()
446 		ino = autofs4_dentry_ino(dentry);  in autofs4_expire_indirect()
450 			expired = should_expire(dentry, mnt, timeout, how);  in autofs4_expire_indirect()
461 			if (expired != dentry)  in autofs4_expire_indirect()
462 				dput(dentry);  in autofs4_expire_indirect()
467 		if (expired != dentry)  in autofs4_expire_indirect()
490 int autofs4_expire_wait(struct dentry *dentry, int rcu_walk)  in autofs4_expire_wait()  argument
492 	struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb);  in autofs4_expire_wait()
493 	struct autofs_info *ino = autofs4_dentry_ino(dentry);  in autofs4_expire_wait()
506 		DPRINTK("waiting for expire %p name=%pd", dentry, dentry);  in autofs4_expire_wait()
508 		status = autofs4_wait(sbi, dentry, NFY_NONE);  in autofs4_expire_wait()
513 		if (d_unhashed(dentry))  in autofs4_expire_wait()
531 	struct dentry *dentry;  in autofs4_expire_run()  local
539 	if ((dentry = autofs4_expire_indirect(sb, mnt, sbi, 0)) == NULL)  in autofs4_expire_run()
542 	pkt.len = dentry->d_name.len;  in autofs4_expire_run()
543 	memcpy(pkt.name, dentry->d_name.name, pkt.len);  in autofs4_expire_run()
545 	dput(dentry);  in autofs4_expire_run()
551 	ino = autofs4_dentry_ino(dentry);  in autofs4_expire_run()
564 	struct dentry *dentry;  in autofs4_do_expire_multi()  local
568 		dentry = autofs4_expire_direct(sb, mnt, sbi, when);  in autofs4_do_expire_multi()
570 		dentry = autofs4_expire_indirect(sb, mnt, sbi, when);  in autofs4_do_expire_multi()
572 	if (dentry) {  in autofs4_do_expire_multi()
573 		struct autofs_info *ino = autofs4_dentry_ino(dentry);  in autofs4_do_expire_multi()
577 		ret = autofs4_wait(sbi, dentry, NFY_EXPIRE);  in autofs4_do_expire_multi()
585 		dput(dentry);  in autofs4_do_expire_multi()