11 static inline int autofs_can_expire(struct dentry *dentry,  in autofs_can_expire()  argument
14 	struct autofs_info *ino = autofs_dentry_ino(dentry);  in autofs_can_expire()
30 			     struct dentry *dentry, unsigned int how)  in autofs_mount_busy()  argument
32 	struct dentry *top = dentry;  in autofs_mount_busy()
33 	struct path path = {.mnt = mnt, .dentry = dentry};  in autofs_mount_busy()
36 	pr_debug("dentry %p %pd\n", dentry, dentry);  in autofs_mount_busy()
43 	if (is_autofs_dentry(path.dentry)) {  in autofs_mount_busy()
44 		struct autofs_sb_info *sbi = autofs_sbi(path.dentry->d_sb);  in autofs_mount_busy()
74 static struct dentry *positive_after(struct dentry *p, struct dentry *child)  in positive_after()
79 		child = list_first_entry(&p->d_subdirs, struct dentry, d_child);  in positive_after()
97 static struct dentry *get_next_positive_subdir(struct dentry *prev,  in get_next_positive_subdir()
98 					       struct dentry *root)  in get_next_positive_subdir()
101 	struct dentry *q;  in get_next_positive_subdir()
115 static struct dentry *get_next_positive_dentry(struct dentry *prev,  in get_next_positive_dentry()
116 					       struct dentry *root)  in get_next_positive_dentry()
119 	struct dentry *p = prev, *ret = NULL, *d = NULL;  in get_next_positive_dentry()
127 		struct dentry *parent;  in get_next_positive_dentry()
151 			      struct dentry *top,  in autofs_direct_busy()
183 			    struct dentry *top,  in autofs_tree_busy()
188 	struct dentry *p;  in autofs_tree_busy()
241 static struct dentry *autofs_check_leaves(struct vfsmount *mnt,  in autofs_check_leaves()
242 					  struct dentry *parent,  in autofs_check_leaves()
246 	struct dentry *p;  in autofs_check_leaves()
274 static struct dentry *autofs_expire_direct(struct super_block *sb,  in autofs_expire_direct()
279 	struct dentry *root = dget(sb->s_root);  in autofs_expire_direct()
321 static struct dentry *should_expire(struct dentry *dentry,  in should_expire()  argument
326 	struct autofs_info *ino = autofs_dentry_ino(dentry);  in should_expire()
339 	if (d_mountpoint(dentry)) {  in should_expire()
340 		pr_debug("checking mountpoint %p %pd\n", dentry, dentry);  in should_expire()
343 		if (autofs_mount_busy(mnt, dentry, how))  in should_expire()
350 			return dentry;  in should_expire()
353 		if (autofs_can_expire(dentry, timeout, how))  in should_expire()
354 			return dentry;  in should_expire()
358 	if (d_is_symlink(dentry)) {  in should_expire()
359 		pr_debug("checking symlink %p %pd\n", dentry, dentry);  in should_expire()
363 			return dentry;  in should_expire()
369 		if (autofs_can_expire(dentry, timeout, how))  in should_expire()
370 			return dentry;  in should_expire()
383 			if (d_count(dentry) > ino_count)  in should_expire()
387 		if (!autofs_tree_busy(mnt, dentry, timeout, how))  in should_expire()
388 			return dentry;  in should_expire()
394 		struct dentry *expired;  in should_expire()
400 			if (d_count(dentry) > ino_count)  in should_expire()
404 		expired = autofs_check_leaves(mnt, dentry, timeout, how);  in should_expire()
406 			if (expired == dentry)  in should_expire()
407 				dput(dentry);  in should_expire()
420 static struct dentry *autofs_expire_indirect(struct super_block *sb,  in autofs_expire_indirect()
426 	struct dentry *root = sb->s_root;  in autofs_expire_indirect()
427 	struct dentry *dentry;  in autofs_expire_indirect()  local
428 	struct dentry *expired;  in autofs_expire_indirect()
429 	struct dentry *found;  in autofs_expire_indirect()
437 	dentry = NULL;  in autofs_expire_indirect()
438 	while ((dentry = get_next_positive_subdir(dentry, root))) {  in autofs_expire_indirect()
440 		ino = autofs_dentry_ino(dentry);  in autofs_expire_indirect()
447 		expired = should_expire(dentry, mnt, timeout, how);  in autofs_expire_indirect()
467 		if (expired != dentry)  in autofs_expire_indirect()
468 			dput(dentry);  in autofs_expire_indirect()
476 		if (expired != dentry)  in autofs_expire_indirect()
491 	struct dentry *dentry = path->dentry;  in autofs_expire_wait()  local
492 	struct autofs_sb_info *sbi = autofs_sbi(dentry->d_sb);  in autofs_expire_wait()
493 	struct autofs_info *ino = autofs_dentry_ino(dentry);  in autofs_expire_wait()
518 		pr_debug("waiting for expire %p name=%pd\n", dentry, dentry);  in autofs_expire_wait()
525 		if (d_unhashed(dentry))  in autofs_expire_wait()
543 	struct dentry *dentry;  in autofs_expire_run()  local
551 	dentry = autofs_expire_indirect(sb, mnt, sbi, 0);  in autofs_expire_run()
552 	if (!dentry)  in autofs_expire_run()
555 	pkt.len = dentry->d_name.len;  in autofs_expire_run()
556 	memcpy(pkt.name, dentry->d_name.name, pkt.len);  in autofs_expire_run()
563 	ino = autofs_dentry_ino(dentry);  in autofs_expire_run()
570 	dput(dentry);  in autofs_expire_run()
578 	struct dentry *dentry;  in autofs_do_expire_multi()  local
582 		dentry = autofs_expire_direct(sb, mnt, sbi, how);  in autofs_do_expire_multi()
584 		dentry = autofs_expire_indirect(sb, mnt, sbi, how);  in autofs_do_expire_multi()
586 	if (dentry) {  in autofs_do_expire_multi()
587 		struct autofs_info *ino = autofs_dentry_ino(dentry);  in autofs_do_expire_multi()
588 		const struct path path = { .mnt = mnt, .dentry = dentry };  in autofs_do_expire_multi()
601 		dput(dentry);  in autofs_do_expire_multi()