44 	return strlcpy(buf, kn->parent ? kn->name : "/", buflen);  in kernfs_name_locked()
65 		kn = kn->parent;  in kernfs_path_locked()
66 	} while (kn && kn->parent);  in kernfs_path_locked()
167 	struct kernfs_node *parent;  in kernfs_get_parent()  local
171 	parent = kn->parent;  in kernfs_get_parent()
172 	kernfs_get(parent);  in kernfs_get_parent()
175 	return parent;  in kernfs_get_parent()
236 	struct rb_node **node = &kn->parent->dir.children.rb_node;  in kernfs_link_sibling()
237 	struct rb_node *parent = NULL;  in kernfs_link_sibling()  local
244 		parent = *node;  in kernfs_link_sibling()
255 	rb_link_node(&kn->rb, parent, node);  in kernfs_link_sibling()
256 	rb_insert_color(&kn->rb, &kn->parent->dir.children);  in kernfs_link_sibling()
260 		kn->parent->dir.subdirs++;  in kernfs_link_sibling()
282 		kn->parent->dir.subdirs--;  in kernfs_unlink_sibling()
284 	rb_erase(&kn->rb, &kn->parent->dir.children);  in kernfs_unlink_sibling()
395 	struct kernfs_node *parent;  in kernfs_put()  local
406 	parent = kn->parent;  in kernfs_put()
410 		  parent ? parent->name : "", kn->name, atomic_read(&kn->active));  in kernfs_put()
427 	kn = parent;  in kernfs_put()
458 	if (dentry->d_parent->d_fsdata != kn->parent)  in kernfs_dop_revalidate()
466 	if (kn->parent && kernfs_ns_enabled(kn->parent) &&  in kernfs_dop_revalidate()
550 struct kernfs_node *kernfs_new_node(struct kernfs_node *parent,  in kernfs_new_node()  argument
556 	kn = __kernfs_new_node(kernfs_root(parent), name, mode, flags);  in kernfs_new_node()
558 		kernfs_get(parent);  in kernfs_new_node()
559 		kn->parent = parent;  in kernfs_new_node()
578 	struct kernfs_node *parent = kn->parent;  in kernfs_add_one()  local
586 	has_ns = kernfs_ns_enabled(parent);  in kernfs_add_one()
588 		 has_ns ? "required" : "invalid", parent->name, kn->name))  in kernfs_add_one()
591 	if (kernfs_type(parent) != KERNFS_DIR)  in kernfs_add_one()
595 	if (parent->flags & KERNFS_EMPTY_DIR)  in kernfs_add_one()
598 	if ((parent->flags & KERNFS_ACTIVATED) && !kernfs_active(parent))  in kernfs_add_one()
608 	ps_iattr = parent->iattr;  in kernfs_add_one()
641 static struct kernfs_node *kernfs_find_ns(struct kernfs_node *parent,  in kernfs_find_ns()  argument
645 	struct rb_node *node = parent->dir.children.rb_node;  in kernfs_find_ns()
646 	bool has_ns = kernfs_ns_enabled(parent);  in kernfs_find_ns()
653 		     has_ns ? "required" : "invalid", parent->name, name);  in kernfs_find_ns()
684 struct kernfs_node *kernfs_find_and_get_ns(struct kernfs_node *parent,  in kernfs_find_and_get_ns()  argument
690 	kn = kernfs_find_ns(parent, name, ns);  in kernfs_find_and_get_ns()
764 struct kernfs_node *kernfs_create_dir_ns(struct kernfs_node *parent,  in kernfs_create_dir_ns()  argument
772 	kn = kernfs_new_node(parent, name, mode | S_IFDIR, KERNFS_DIR);  in kernfs_create_dir_ns()
776 	kn->dir.root = parent->dir.root;  in kernfs_create_dir_ns()
796 struct kernfs_node *kernfs_create_empty_dir(struct kernfs_node *parent,  in kernfs_create_empty_dir()  argument
803 	kn = kernfs_new_node(parent, name, S_IRUGO|S_IXUGO|S_IFDIR, KERNFS_DIR);  in kernfs_create_empty_dir()
808 	kn->dir.root = parent->dir.root;  in kernfs_create_empty_dir()
826 	struct kernfs_node *parent = dentry->d_parent->d_fsdata;  in kernfs_iop_lookup()  local
833 	if (kernfs_ns_enabled(parent))  in kernfs_iop_lookup()
836 	kn = kernfs_find_ns(parent, dentry->d_name.name, ns);  in kernfs_iop_lookup()
863 	struct kernfs_node *parent = dir->i_private;  in kernfs_iop_mkdir()  local
864 	struct kernfs_syscall_ops *scops = kernfs_root(parent)->syscall_ops;  in kernfs_iop_mkdir()
870 	if (!kernfs_get_active(parent))  in kernfs_iop_mkdir()
873 	ret = scops->mkdir(parent, dentry->d_name.name, mode);  in kernfs_iop_mkdir()
875 	kernfs_put_active(parent);  in kernfs_iop_mkdir()
990 	return pos->parent;  in kernfs_next_descendant_post()
1017 		WARN_ON_ONCE(pos->parent && RB_EMPTY_NODE(&pos->rb));  in kernfs_activate()
1038 	if (!kn || (kn->parent && RB_EMPTY_NODE(&kn->rb)))  in __kernfs_remove()
1076 		if (!pos->parent || kernfs_unlink_sibling(pos)) {  in __kernfs_remove()
1078 				pos->parent ? pos->parent->iattr : NULL;  in __kernfs_remove()
1246 int kernfs_remove_by_name_ns(struct kernfs_node *parent, const char *name,  in kernfs_remove_by_name_ns()  argument
1251 	if (!parent) {  in kernfs_remove_by_name_ns()
1259 	kn = kernfs_find_ns(parent, name, ns);  in kernfs_remove_by_name_ns()
1286 	if (!kn->parent)  in kernfs_rename_ns()
1297 	if ((kn->parent == new_parent) && (kn->ns == new_ns) &&  in kernfs_rename_ns()
1324 	old_parent = kn->parent;  in kernfs_rename_ns()
1325 	kn->parent = new_parent;  in kernfs_rename_ns()
1360 	struct kernfs_node *parent, loff_t hash, struct kernfs_node *pos)  in kernfs_dir_pos()  argument
1364 			pos->parent == parent && hash == pos->hash;  in kernfs_dir_pos()
1370 		struct rb_node *node = parent->dir.children.rb_node;  in kernfs_dir_pos()
1394 	struct kernfs_node *parent, ino_t ino, struct kernfs_node *pos)  in kernfs_dir_next_pos()  argument
1396 	pos = kernfs_dir_pos(ns, parent, ino, pos);  in kernfs_dir_next_pos()
1412 	struct kernfs_node *parent = dentry->d_fsdata;  in kernfs_fop_readdir()  local
1420 	if (kernfs_ns_enabled(parent))  in kernfs_fop_readdir()
1423 	for (pos = kernfs_dir_pos(ns, parent, ctx->pos, pos);  in kernfs_fop_readdir()
1425 	     pos = kernfs_dir_next_pos(ns, parent, ctx->pos, pos)) {  in kernfs_fop_readdir()