22 static struct key *check_cached_key(struct keyring_search_context *ctx)  in check_cached_key()
25 	struct key *key = current->cached_requested_key;  in check_cached_key()  local
27 	if (key &&  in check_cached_key()
28 	    ctx->match_data.cmp(key, &ctx->match_data) &&  in check_cached_key()
29 	    !(key->flags & ((1 << KEY_FLAG_INVALIDATED) |  in check_cached_key()
31 		return key_get(key);  in check_cached_key()
36 static void cache_requested_key(struct key *key)  in cache_requested_key()  argument
44 		t->cached_requested_key = key_get(key);  in cache_requested_key()
59 void complete_request_key(struct key *authkey, int error)  in complete_request_key()
62 	struct key *key = rka->target_key;  in complete_request_key()  local
64 	kenter("%d{%d},%d", authkey->serial, key->serial, error);  in complete_request_key()
67 		key_negate_and_link(key, key_negative_timeout, NULL, authkey);  in complete_request_key()
82 	struct key *keyring = info->data;  in umh_keys_init()
92 	struct key *keyring = info->data;  in umh_keys_cleanup()
100 					struct key *session_keyring, int wait)  in call_usermodehelper_keys()
118 static int call_sbin_request_key(struct key *authkey, void *aux)  in call_sbin_request_key()
124 	struct key *key = rka->target_key, *keyring, *session, *user_session;  in call_sbin_request_key()  local
130 	kenter("{%d},{%d},%s", key->serial, authkey->serial, rka->op);  in call_sbin_request_key()
137 	sprintf(desc, "_req.%u", key->serial);  in call_sbin_request_key()
159 	sprintf(key_str, "%d", key->serial);  in call_sbin_request_key()
201 		if (test_bit(KEY_FLAG_USER_CONSTRUCT, &key->flags) ||  in call_sbin_request_key()
202 		    key_validate(key) < 0)  in call_sbin_request_key()
226 static int construct_key(struct key *key, const void *callout_info,  in construct_key()  argument
228 			 struct key *dest_keyring)  in construct_key()
231 	struct key *authkey;  in construct_key()
234 	kenter("%d,%p,%zu,%p", key->serial, callout_info, callout_len, aux);  in construct_key()
237 	authkey = request_key_auth_new(key, "create", callout_info, callout_len,  in construct_key()
244 	if (key->type->request_key)  in construct_key()
245 		actor = key->type->request_key;  in construct_key()
265 static int construct_get_dest_keyring(struct key **_dest_keyring)  in construct_get_dest_keyring()
269 	struct key *dest_keyring = *_dest_keyring, *authkey;  in construct_get_dest_keyring()
370 			       struct key *dest_keyring,  in construct_alloc_key()
373 			       struct key **_key)  in construct_alloc_key()
376 	struct key *key;  in construct_alloc_key()  local
395 	key = key_alloc(ctx->index_key.type, ctx->index_key.description,  in construct_alloc_key()
398 	if (IS_ERR(key))  in construct_alloc_key()
401 	set_bit(KEY_FLAG_USER_CONSTRUCT, &key->flags);  in construct_alloc_key()
404 		ret = __key_link_lock(dest_keyring, &key->index_key);  in construct_alloc_key()
428 		ret = __key_link_begin(dest_keyring, &key->index_key, &edit);  in construct_alloc_key()
431 		__key_link(dest_keyring, key, &edit);  in construct_alloc_key()
436 		__key_link_end(dest_keyring, &key->index_key, edit);  in construct_alloc_key()
438 	*_key = key;  in construct_alloc_key()
439 	kleave(" = 0 [%d]", key_serial(key));  in construct_alloc_key()
445 	key_put(key);  in construct_alloc_key()
447 	key = key_ref_to_ptr(key_ref);  in construct_alloc_key()
449 		ret = __key_link_begin(dest_keyring, &key->index_key, &edit);  in construct_alloc_key()
452 		ret = __key_link_check_live_key(dest_keyring, key);  in construct_alloc_key()
454 			__key_link(dest_keyring, key, &edit);  in construct_alloc_key()
455 		__key_link_end(dest_keyring, &key->index_key, edit);  in construct_alloc_key()
460 	*_key = key;  in construct_alloc_key()
461 	kleave(" = -EINPROGRESS [%d]", key_serial(key));  in construct_alloc_key()
466 	key_put(key);  in construct_alloc_key()
473 	__key_link_end(dest_keyring, &key->index_key, edit);  in construct_alloc_key()
476 	key_put(key);  in construct_alloc_key()
482 	kleave(" = %ld", PTR_ERR(key));  in construct_alloc_key()
483 	return PTR_ERR(key);  in construct_alloc_key()
489 static struct key *construct_key_and_link(struct keyring_search_context *ctx,  in construct_key_and_link()
493 					  struct key *dest_keyring,  in construct_key_and_link()
497 	struct key *key;  in construct_key_and_link()  local
515 	ret = construct_alloc_key(ctx, dest_keyring, flags, user, &key);  in construct_key_and_link()
519 		ret = construct_key(key, callout_info, callout_len, aux,  in construct_key_and_link()
532 	kleave(" = key %d", key_serial(key));  in construct_key_and_link()
533 	return key;  in construct_key_and_link()
536 	key_negate_and_link(key, key_negative_timeout, NULL, NULL);  in construct_key_and_link()
537 	key_put(key);  in construct_key_and_link()
574 struct key *request_key_and_link(struct key_type *type,  in request_key_and_link()
580 				 struct key *dest_keyring,  in request_key_and_link()
596 	struct key *key;  in request_key_and_link()  local
607 			key = ERR_PTR(ret);  in request_key_and_link()
612 	key = check_cached_key(&ctx);  in request_key_and_link()
613 	if (key)  in request_key_and_link()
627 				key = ERR_PTR(ret);  in request_key_and_link()
632 		key = key_ref_to_ptr(key_ref);  in request_key_and_link()
634 			ret = key_link(dest_keyring, key);  in request_key_and_link()
636 				key_put(key);  in request_key_and_link()
637 				key = ERR_PTR(ret);  in request_key_and_link()
643 		cache_requested_key(key);  in request_key_and_link()
645 		key = ERR_CAST(key_ref);  in request_key_and_link()
649 		key = ERR_PTR(-ENOKEY);  in request_key_and_link()
653 		key = construct_key_and_link(&ctx, callout_info, callout_len,  in request_key_and_link()
661 	kleave(" = %p", key);  in request_key_and_link()
662 	return key;  in request_key_and_link()
676 int wait_for_key_construction(struct key *key, bool intr)  in wait_for_key_construction()  argument
680 	ret = wait_on_bit(&key->flags, KEY_FLAG_USER_CONSTRUCT,  in wait_for_key_construction()
684 	ret = key_read_state(key);  in wait_for_key_construction()
687 	return key_validate(key);  in wait_for_key_construction()
706 struct key *request_key_tag(struct key_type *type,  in request_key_tag()
711 	struct key *key;  in request_key_tag()  local
717 	key = request_key_and_link(type, description, domain_tag,  in request_key_tag()
720 	if (!IS_ERR(key)) {  in request_key_tag()
721 		ret = wait_for_key_construction(key, false);  in request_key_tag()
723 			key_put(key);  in request_key_tag()
727 	return key;  in request_key_tag()
746 struct key *request_key_with_auxdata(struct key_type *type,  in request_key_with_auxdata()
753 	struct key *key;  in request_key_with_auxdata()  local
756 	key = request_key_and_link(type, description, domain_tag,  in request_key_with_auxdata()
759 	if (!IS_ERR(key)) {  in request_key_with_auxdata()
760 		ret = wait_for_key_construction(key, false);  in request_key_with_auxdata()
762 			key_put(key);  in request_key_with_auxdata()
766 	return key;  in request_key_with_auxdata()
782 struct key *request_key_rcu(struct key_type *type,  in request_key_rcu()
798 	struct key *key;  in request_key_rcu()  local
803 	key = check_cached_key(&ctx);  in request_key_rcu()
804 	if (key)  in request_key_rcu()
805 		return key;  in request_key_rcu()
810 		key = ERR_CAST(key_ref);  in request_key_rcu()
812 			key = ERR_PTR(-ENOKEY);  in request_key_rcu()
814 		key = key_ref_to_ptr(key_ref);  in request_key_rcu()
815 		cache_requested_key(key);  in request_key_rcu()
818 	kleave(" = %p", key);  in request_key_rcu()
819 	return key;  in request_key_rcu()