154 static void free_direct_key(struct fscrypt_direct_key *dk)  in free_direct_key()  argument
156 	if (dk) {  in free_direct_key()
157 		crypto_free_skcipher(dk->dk_ctfm);  in free_direct_key()
158 		kzfree(dk);  in free_direct_key()
162 void fscrypt_put_direct_key(struct fscrypt_direct_key *dk)  in fscrypt_put_direct_key()  argument
164 	if (!refcount_dec_and_lock(&dk->dk_refcount, &fscrypt_direct_keys_lock))  in fscrypt_put_direct_key()
166 	hash_del(&dk->dk_node);  in fscrypt_put_direct_key()
169 	free_direct_key(dk);  in fscrypt_put_direct_key()
183 	struct fscrypt_direct_key *dk;  in find_or_insert_direct_key()  local
196 	hash_for_each_possible(fscrypt_direct_keys, dk, dk_node, hash_key) {  in find_or_insert_direct_key()
198 			   dk->dk_descriptor, FSCRYPT_KEY_DESCRIPTOR_SIZE) != 0)  in find_or_insert_direct_key()
200 		if (ci->ci_mode != dk->dk_mode)  in find_or_insert_direct_key()
202 		if (crypto_memneq(raw_key, dk->dk_raw, ci->ci_mode->keysize))  in find_or_insert_direct_key()
205 		refcount_inc(&dk->dk_refcount);  in find_or_insert_direct_key()
208 		return dk;  in find_or_insert_direct_key()
220 	struct fscrypt_direct_key *dk;  in fscrypt_get_direct_key()  local
224 	dk = find_or_insert_direct_key(NULL, raw_key, ci);  in fscrypt_get_direct_key()
225 	if (dk)  in fscrypt_get_direct_key()
226 		return dk;  in fscrypt_get_direct_key()
229 	dk = kzalloc(sizeof(*dk), GFP_NOFS);  in fscrypt_get_direct_key()
230 	if (!dk)  in fscrypt_get_direct_key()
232 	refcount_set(&dk->dk_refcount, 1);  in fscrypt_get_direct_key()
233 	dk->dk_mode = ci->ci_mode;  in fscrypt_get_direct_key()
234 	dk->dk_ctfm = fscrypt_allocate_skcipher(ci->ci_mode, raw_key,  in fscrypt_get_direct_key()
236 	if (IS_ERR(dk->dk_ctfm)) {  in fscrypt_get_direct_key()
237 		err = PTR_ERR(dk->dk_ctfm);  in fscrypt_get_direct_key()
238 		dk->dk_ctfm = NULL;  in fscrypt_get_direct_key()
241 	memcpy(dk->dk_descriptor, ci->ci_policy.v1.master_key_descriptor,  in fscrypt_get_direct_key()
243 	memcpy(dk->dk_raw, raw_key, ci->ci_mode->keysize);  in fscrypt_get_direct_key()
245 	return find_or_insert_direct_key(dk, raw_key, ci);  in fscrypt_get_direct_key()
248 	free_direct_key(dk);  in fscrypt_get_direct_key()
257 	struct fscrypt_direct_key *dk;  in setup_v1_file_key_direct()  local
277 	dk = fscrypt_get_direct_key(ci, raw_master_key);  in setup_v1_file_key_direct()
278 	if (IS_ERR(dk))  in setup_v1_file_key_direct()
279 		return PTR_ERR(dk);  in setup_v1_file_key_direct()
280 	ci->ci_direct_key = dk;  in setup_v1_file_key_direct()
281 	ci->ci_ctfm = dk->dk_ctfm;  in setup_v1_file_key_direct()