59 	return strlcpy(buf, kn->parent ? kn->name : "/", buflen);  in kernfs_name_locked()
67 	while (to->parent && to != from) {  in kernfs_depth()
69 		to = to->parent;  in kernfs_depth()
87 		a = a->parent;  in kernfs_common_ancestor()
91 		b = b->parent;  in kernfs_common_ancestor()
97 		b = b->parent;  in kernfs_common_ancestor()
98 		a = a->parent;  in kernfs_common_ancestor()
171 			kn = kn->parent;  in kernfs_path_from_node_locked()
293 	struct kernfs_node *parent;  in kernfs_get_parent()  local
297 	parent = kn->parent;  in kernfs_get_parent()
298 	kernfs_get(parent);  in kernfs_get_parent()
301 	return parent;  in kernfs_get_parent()
362 	struct rb_node **node = &kn->parent->dir.children.rb_node;  in kernfs_link_sibling()
363 	struct rb_node *parent = NULL;  in kernfs_link_sibling()  local
370 		parent = *node;  in kernfs_link_sibling()
381 	rb_link_node(&kn->rb, parent, node);  in kernfs_link_sibling()
382 	rb_insert_color(&kn->rb, &kn->parent->dir.children);  in kernfs_link_sibling()
386 		kn->parent->dir.subdirs++;  in kernfs_link_sibling()
387 	kernfs_inc_rev(kn->parent);  in kernfs_link_sibling()
409 		kn->parent->dir.subdirs--;  in kernfs_unlink_sibling()
410 	kernfs_inc_rev(kn->parent);  in kernfs_unlink_sibling()
412 	rb_erase(&kn->rb, &kn->parent->dir.children);  in kernfs_unlink_sibling()
533 	struct kernfs_node *parent;  in kernfs_put()  local
544 	parent = kn->parent;  in kernfs_put()
548 		  parent ? parent->name : "", kn->name, atomic_read(&kn->active));  in kernfs_put()
564 	kn = parent;  in kernfs_put()
595 					     struct kernfs_node *parent,  in __kernfs_new_node()  argument
646 	if (parent) {  in __kernfs_new_node()
647 		ret = security_kernfs_init_security(parent, kn);  in __kernfs_new_node()
663 struct kernfs_node *kernfs_new_node(struct kernfs_node *parent,  in kernfs_new_node()  argument
670 	kn = __kernfs_new_node(kernfs_root(parent), parent,  in kernfs_new_node()
673 		kernfs_get(parent);  in kernfs_new_node()
674 		kn->parent = parent;  in kernfs_new_node()
742 	struct kernfs_node *parent = kn->parent;  in kernfs_add_one()  local
743 	struct kernfs_root *root = kernfs_root(parent);  in kernfs_add_one()
751 	has_ns = kernfs_ns_enabled(parent);  in kernfs_add_one()
753 		 has_ns ? "required" : "invalid", parent->name, kn->name))  in kernfs_add_one()
756 	if (kernfs_type(parent) != KERNFS_DIR)  in kernfs_add_one()
760 	if (parent->flags & (KERNFS_REMOVING | KERNFS_EMPTY_DIR))  in kernfs_add_one()
770 	ps_iattr = parent->iattr;  in kernfs_add_one()
803 static struct kernfs_node *kernfs_find_ns(struct kernfs_node *parent,  in kernfs_find_ns()  argument
807 	struct rb_node *node = parent->dir.children.rb_node;  in kernfs_find_ns()
808 	bool has_ns = kernfs_ns_enabled(parent);  in kernfs_find_ns()
811 	lockdep_assert_held(&kernfs_root(parent)->kernfs_rwsem);  in kernfs_find_ns()
815 		     has_ns ? "required" : "invalid", parent->name, name);  in kernfs_find_ns()
836 static struct kernfs_node *kernfs_walk_ns(struct kernfs_node *parent,  in kernfs_walk_ns()  argument
843 	lockdep_assert_held_read(&kernfs_root(parent)->kernfs_rwsem);  in kernfs_walk_ns()
856 	while ((name = strsep(&p, "/")) && parent) {  in kernfs_walk_ns()
859 		parent = kernfs_find_ns(parent, name, ns);  in kernfs_walk_ns()
864 	return parent;  in kernfs_walk_ns()
877 struct kernfs_node *kernfs_find_and_get_ns(struct kernfs_node *parent,  in kernfs_find_and_get_ns()  argument
881 	struct kernfs_root *root = kernfs_root(parent);  in kernfs_find_and_get_ns()
884 	kn = kernfs_find_ns(parent, name, ns);  in kernfs_find_and_get_ns()
902 struct kernfs_node *kernfs_walk_and_get_ns(struct kernfs_node *parent,  in kernfs_walk_and_get_ns()  argument
906 	struct kernfs_root *root = kernfs_root(parent);  in kernfs_walk_and_get_ns()
909 	kn = kernfs_walk_ns(parent, path, ns);  in kernfs_walk_and_get_ns()
1012 struct kernfs_node *kernfs_create_dir_ns(struct kernfs_node *parent,  in kernfs_create_dir_ns()  argument
1021 	kn = kernfs_new_node(parent, name, mode | S_IFDIR,  in kernfs_create_dir_ns()
1026 	kn->dir.root = parent->dir.root;  in kernfs_create_dir_ns()
1046 struct kernfs_node *kernfs_create_empty_dir(struct kernfs_node *parent,  in kernfs_create_empty_dir()  argument
1053 	kn = kernfs_new_node(parent, name, S_IRUGO|S_IXUGO|S_IFDIR,  in kernfs_create_empty_dir()
1059 	kn->dir.root = parent->dir.root;  in kernfs_create_empty_dir()
1082 		struct kernfs_node *parent;  in kernfs_dop_revalidate()  local
1088 		parent = kernfs_dentry_node(dentry->d_parent);  in kernfs_dop_revalidate()
1089 		if (parent) {  in kernfs_dop_revalidate()
1091 			root = kernfs_root(parent);  in kernfs_dop_revalidate()
1093 			if (kernfs_dir_changed(parent, dentry)) {  in kernfs_dop_revalidate()
1116 	if (kernfs_dentry_node(dentry->d_parent) != kn->parent)  in kernfs_dop_revalidate()
1124 	if (kn->parent && kernfs_ns_enabled(kn->parent) &&  in kernfs_dop_revalidate()
1143 	struct kernfs_node *parent = dir->i_private;  in kernfs_iop_lookup()  local
1149 	root = kernfs_root(parent);  in kernfs_iop_lookup()
1151 	if (kernfs_ns_enabled(parent))  in kernfs_iop_lookup()
1154 	kn = kernfs_find_ns(parent, dentry->d_name.name, ns);  in kernfs_iop_lookup()
1175 		kernfs_set_rev(parent, dentry);  in kernfs_iop_lookup()
1186 	struct kernfs_node *parent = dir->i_private;  in kernfs_iop_mkdir()  local
1187 	struct kernfs_syscall_ops *scops = kernfs_root(parent)->syscall_ops;  in kernfs_iop_mkdir()
1193 	if (!kernfs_get_active(parent))  in kernfs_iop_mkdir()
1196 	ret = scops->mkdir(parent, dentry->d_name.name, mode);  in kernfs_iop_mkdir()
1198 	kernfs_put_active(parent);  in kernfs_iop_mkdir()
1315 	return pos->parent;  in kernfs_next_descendant_post()
1327 	WARN_ON_ONCE(kn->parent && RB_EMPTY_NODE(&kn->rb));  in kernfs_activate_one()
1409 	if (kn->parent && RB_EMPTY_NODE(&kn->rb))  in __kernfs_remove()
1440 		if (!pos->parent || kernfs_unlink_sibling(pos)) {  in __kernfs_remove()
1442 				pos->parent ? pos->parent->iattr : NULL;  in __kernfs_remove()
1618 int kernfs_remove_by_name_ns(struct kernfs_node *parent, const char *name,  in kernfs_remove_by_name_ns()  argument
1624 	if (!parent) {  in kernfs_remove_by_name_ns()
1630 	root = kernfs_root(parent);  in kernfs_remove_by_name_ns()
1633 	kn = kernfs_find_ns(parent, name, ns);  in kernfs_remove_by_name_ns()
1664 	if (!kn->parent)  in kernfs_rename_ns()
1676 	if ((kn->parent == new_parent) && (kn->ns == new_ns) &&  in kernfs_rename_ns()
1703 	old_parent = kn->parent;  in kernfs_rename_ns()
1704 	kn->parent = new_parent;  in kernfs_rename_ns()
1739 	struct kernfs_node *parent, loff_t hash, struct kernfs_node *pos)  in kernfs_dir_pos()  argument
1743 			pos->parent == parent && hash == pos->hash;  in kernfs_dir_pos()
1749 		struct rb_node *node = parent->dir.children.rb_node;  in kernfs_dir_pos()
1773 	struct kernfs_node *parent, ino_t ino, struct kernfs_node *pos)  in kernfs_dir_next_pos()  argument
1775 	pos = kernfs_dir_pos(ns, parent, ino, pos);  in kernfs_dir_next_pos()
1791 	struct kernfs_node *parent = kernfs_dentry_node(dentry);  in kernfs_fop_readdir()  local
1799 	root = kernfs_root(parent);  in kernfs_fop_readdir()
1802 	if (kernfs_ns_enabled(parent))  in kernfs_fop_readdir()
1805 	for (pos = kernfs_dir_pos(ns, parent, ctx->pos, pos);  in kernfs_fop_readdir()
1807 	     pos = kernfs_dir_next_pos(ns, parent, ctx->pos, pos)) {  in kernfs_fop_readdir()