155 static void free_direct_key(struct fscrypt_direct_key *dk)  in free_direct_key()  argument
157 	if (dk) {  in free_direct_key()
158 		fscrypt_destroy_prepared_key(dk->dk_sb, &dk->dk_key);  in free_direct_key()
159 		kfree_sensitive(dk);  in free_direct_key()
163 void fscrypt_put_direct_key(struct fscrypt_direct_key *dk)  in fscrypt_put_direct_key()  argument
165 	if (!refcount_dec_and_lock(&dk->dk_refcount, &fscrypt_direct_keys_lock))  in fscrypt_put_direct_key()
167 	hash_del(&dk->dk_node);  in fscrypt_put_direct_key()
170 	free_direct_key(dk);  in fscrypt_put_direct_key()
184 	struct fscrypt_direct_key *dk;  in find_or_insert_direct_key()  local
197 	hash_for_each_possible(fscrypt_direct_keys, dk, dk_node, hash_key) {  in find_or_insert_direct_key()
199 			   dk->dk_descriptor, FSCRYPT_KEY_DESCRIPTOR_SIZE) != 0)  in find_or_insert_direct_key()
201 		if (ci->ci_mode != dk->dk_mode)  in find_or_insert_direct_key()
203 		if (!fscrypt_is_key_prepared(&dk->dk_key, ci))  in find_or_insert_direct_key()
205 		if (crypto_memneq(raw_key, dk->dk_raw, ci->ci_mode->keysize))  in find_or_insert_direct_key()
208 		refcount_inc(&dk->dk_refcount);  in find_or_insert_direct_key()
211 		return dk;  in find_or_insert_direct_key()
223 	struct fscrypt_direct_key *dk;  in fscrypt_get_direct_key()  local
227 	dk = find_or_insert_direct_key(NULL, raw_key, ci);  in fscrypt_get_direct_key()
228 	if (dk)  in fscrypt_get_direct_key()
229 		return dk;  in fscrypt_get_direct_key()
232 	dk = kzalloc(sizeof(*dk), GFP_KERNEL);  in fscrypt_get_direct_key()
233 	if (!dk)  in fscrypt_get_direct_key()
235 	dk->dk_sb = ci->ci_inode->i_sb;  in fscrypt_get_direct_key()
236 	refcount_set(&dk->dk_refcount, 1);  in fscrypt_get_direct_key()
237 	dk->dk_mode = ci->ci_mode;  in fscrypt_get_direct_key()
238 	err = fscrypt_prepare_key(&dk->dk_key, raw_key, ci);  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()
256 	struct fscrypt_direct_key *dk;  in setup_v1_file_key_direct()  local
258 	dk = fscrypt_get_direct_key(ci, raw_master_key);  in setup_v1_file_key_direct()
259 	if (IS_ERR(dk))  in setup_v1_file_key_direct()
260 		return PTR_ERR(dk);  in setup_v1_file_key_direct()
261 	ci->ci_direct_key = dk;  in setup_v1_file_key_direct()
262 	ci->ci_enc_key = dk->dk_key;  in setup_v1_file_key_direct()