414 static void __free_klistns_free(const struct klistns *kls)  in __free_klistns_free()  argument
416 	if (kls->user_ns_id != LISTNS_CURRENT_USER)  in __free_klistns_free()
417 		put_user_ns(kls->user_ns);  in __free_klistns_free()
418 	if (kls->first_ns && kls->first_ns->ops)  in __free_klistns_free()
419 		kls->first_ns->ops->put(kls->first_ns);  in __free_klistns_free()
450 static inline int prepare_klistns(struct klistns *kls, struct ns_id_req *kreq,  in prepare_klistns()  argument
453 	kls->last_ns_id = kreq->ns_id;  in prepare_klistns()
454 	kls->user_ns_id = kreq->user_ns_id;  in prepare_klistns()
455 	kls->nr_ns_ids	= nr_ns_ids;  in prepare_klistns()
456 	kls->ns_type	= kreq->ns_type;  in prepare_klistns()
457 	kls->uns_ids	= ns_ids;  in prepare_klistns()
509 static inline bool __must_check ns_requested(const struct klistns *kls,  in ns_requested()  argument
512 	return !kls->ns_type || (kls->ns_type & ns->ns_type);  in ns_requested()
515 static inline bool __must_check may_list_ns(const struct klistns *kls,  in may_list_ns()  argument
518 	if (kls->user_ns && kls->userns_capable)  in may_list_ns()
533 static inline struct ns_common *__must_check legitimize_ns(const struct klistns *kls,  in legitimize_ns()  argument
538 	if (!ns_requested(kls, candidate))  in legitimize_ns()
545 	if (!may_list_ns(kls, ns))  in legitimize_ns()
551 static ssize_t do_listns_userns(struct klistns *kls)  in do_listns_userns()  argument
553 	u64 __user *ns_ids = kls->uns_ids;  in do_listns_userns()
554 	size_t nr_ns_ids = kls->nr_ns_ids;  in do_listns_userns()
559 	VFS_WARN_ON_ONCE(!kls->user_ns_id);  in do_listns_userns()
561 	if (kls->user_ns_id == LISTNS_CURRENT_USER)  in do_listns_userns()
563 	else if (kls->user_ns_id)  in do_listns_userns()
564 		ns = lookup_ns_id(kls->user_ns_id, CLONE_NEWUSER);  in do_listns_userns()
567 	kls->user_ns = to_user_ns(ns);  in do_listns_userns()
573 	if (kls->last_ns_id) {  in do_listns_userns()
574 		kls->first_ns = lookup_ns_owner_at(kls->last_ns_id + 1, ns);  in do_listns_userns()
575 		if (!kls->first_ns)  in do_listns_userns()
577 		first_ns = kls->first_ns;  in do_listns_userns()
581 	head = &to_ns_common(kls->user_ns)->ns_owner_root.ns_list_head;  in do_listns_userns()
582 	kls->userns_capable = may_see_all_namespaces();  in do_listns_userns()
596 		valid = legitimize_ns(kls, ns);  in do_listns_userns()
695 static ssize_t do_listns(struct klistns *kls)  in do_listns()  argument
697 	u64 __user *ns_ids = kls->uns_ids;  in do_listns()
698 	size_t nr_ns_ids = kls->nr_ns_ids;  in do_listns()
705 	if (hweight32(kls->ns_type) == 1)  in do_listns()
706 		ns_type = kls->ns_type;  in do_listns()
716 	if (kls->last_ns_id) {  in do_listns()
717 		kls->first_ns = lookup_ns_id_at(kls->last_ns_id + 1, ns_type);  in do_listns()
718 		if (!kls->first_ns)  in do_listns()
720 		first_ns = kls->first_ns;  in do_listns()
738 		valid = legitimize_ns(kls, ns);  in do_listns()