44 	struct fsverity_hash_alg *alg;  in fsverity_get_hash_alg()  local
53 	alg = &fsverity_hash_algs[num];  in fsverity_get_hash_alg()
56 	if (likely(smp_load_acquire(&alg->tfm) != NULL))  in fsverity_get_hash_alg()
57 		return alg;  in fsverity_get_hash_alg()
61 	if (alg->tfm != NULL)  in fsverity_get_hash_alg()
68 	tfm = crypto_alloc_ahash(alg->name, 0, 0);  in fsverity_get_hash_alg()
73 				      alg->name);  in fsverity_get_hash_alg()
74 			alg = ERR_PTR(-ENOPKG);  in fsverity_get_hash_alg()
79 			     alg->name, PTR_ERR(tfm));  in fsverity_get_hash_alg()
80 		alg = ERR_CAST(tfm);  in fsverity_get_hash_alg()
85 	if (WARN_ON(alg->digest_size != crypto_ahash_digestsize(tfm)))  in fsverity_get_hash_alg()
87 	if (WARN_ON(alg->block_size != crypto_ahash_blocksize(tfm)))  in fsverity_get_hash_alg()
90 	err = mempool_init_kmalloc_pool(&alg->req_pool, 1,  in fsverity_get_hash_alg()
97 		alg->name, crypto_ahash_driver_name(tfm));  in fsverity_get_hash_alg()
100 	smp_store_release(&alg->tfm, tfm);  in fsverity_get_hash_alg()
105 	alg = ERR_PTR(err);  in fsverity_get_hash_alg()
108 	return alg;  in fsverity_get_hash_alg()
123 struct ahash_request *fsverity_alloc_hash_request(struct fsverity_hash_alg *alg,  in fsverity_alloc_hash_request()  argument
126 	struct ahash_request *req = mempool_alloc(&alg->req_pool, gfp_flags);  in fsverity_alloc_hash_request()
129 		ahash_request_set_tfm(req, alg->tfm);  in fsverity_alloc_hash_request()
138 void fsverity_free_hash_request(struct fsverity_hash_alg *alg,  in fsverity_free_hash_request()  argument
143 		mempool_free(req, &alg->req_pool);  in fsverity_free_hash_request()
156 const u8 *fsverity_prepare_hash_state(struct fsverity_hash_alg *alg,  in fsverity_prepare_hash_state()  argument
170 	hashstate = kmalloc(crypto_ahash_statesize(alg->tfm), GFP_KERNEL);  in fsverity_prepare_hash_state()
175 	req = fsverity_alloc_hash_request(alg, GFP_KERNEL);  in fsverity_prepare_hash_state()
184 	padded_salt_size = round_up(salt_size, alg->block_size);  in fsverity_prepare_hash_state()
210 	fsverity_free_hash_request(alg, req);  in fsverity_prepare_hash_state()
281 int fsverity_hash_buffer(struct fsverity_hash_alg *alg,  in fsverity_hash_buffer()  argument
290 	req = fsverity_alloc_hash_request(alg, GFP_KERNEL);  in fsverity_hash_buffer()
300 	fsverity_free_hash_request(alg, req);  in fsverity_hash_buffer()
313 		const struct fsverity_hash_alg *alg = &fsverity_hash_algs[i];  in fsverity_check_hash_algs()  local
315 		if (!alg->name)  in fsverity_check_hash_algs()
318 		BUG_ON(alg->digest_size > FS_VERITY_MAX_DIGEST_SIZE);  in fsverity_check_hash_algs()
325 		BUG_ON(!is_power_of_2(alg->digest_size));  in fsverity_check_hash_algs()
326 		BUG_ON(!is_power_of_2(alg->block_size));  in fsverity_check_hash_algs()