45 	struct fsverity_hash_alg *alg;  in fsverity_get_hash_alg()  local
54 	alg = &fsverity_hash_algs[num];  in fsverity_get_hash_alg()
57 	if (likely(smp_load_acquire(&alg->tfm) != NULL))  in fsverity_get_hash_alg()
58 		return alg;  in fsverity_get_hash_alg()
62 	if (alg->tfm != NULL)  in fsverity_get_hash_alg()
65 	tfm = crypto_alloc_shash(alg->name, 0, 0);  in fsverity_get_hash_alg()
70 				      alg->name);  in fsverity_get_hash_alg()
71 			alg = ERR_PTR(-ENOPKG);  in fsverity_get_hash_alg()
76 			     alg->name, PTR_ERR(tfm));  in fsverity_get_hash_alg()
77 		alg = ERR_CAST(tfm);  in fsverity_get_hash_alg()
82 	if (WARN_ON_ONCE(alg->digest_size != crypto_shash_digestsize(tfm)))  in fsverity_get_hash_alg()
84 	if (WARN_ON_ONCE(alg->block_size != crypto_shash_blocksize(tfm)))  in fsverity_get_hash_alg()
88 		alg->name, crypto_shash_driver_name(tfm));  in fsverity_get_hash_alg()
91 	smp_store_release(&alg->tfm, tfm);  in fsverity_get_hash_alg()
96 	alg = ERR_PTR(err);  in fsverity_get_hash_alg()
99 	return alg;  in fsverity_get_hash_alg()
111 const u8 *fsverity_prepare_hash_state(const struct fsverity_hash_alg *alg,  in fsverity_prepare_hash_state()  argument
115 	SHASH_DESC_ON_STACK(desc, alg->tfm);  in fsverity_prepare_hash_state()
120 	desc->tfm = alg->tfm;  in fsverity_prepare_hash_state()
125 	hashstate = kmalloc(crypto_shash_statesize(alg->tfm), GFP_KERNEL);  in fsverity_prepare_hash_state()
136 	padded_salt_size = round_up(salt_size, alg->block_size);  in fsverity_prepare_hash_state()
209 int fsverity_hash_buffer(const struct fsverity_hash_alg *alg,  in fsverity_hash_buffer()  argument
212 	return crypto_shash_tfm_digest(alg->tfm, data, size, out);  in fsverity_hash_buffer()
224 		const struct fsverity_hash_alg *alg = &fsverity_hash_algs[i];  in fsverity_check_hash_algs()  local
226 		if (!alg->name)  in fsverity_check_hash_algs()
237 		BUG_ON(alg->digest_size > FS_VERITY_MAX_DIGEST_SIZE);  in fsverity_check_hash_algs()
244 		BUG_ON(!is_power_of_2(alg->digest_size));  in fsverity_check_hash_algs()
245 		BUG_ON(!is_power_of_2(alg->block_size));  in fsverity_check_hash_algs()
248 		BUG_ON(alg->algo_id == 0);  in fsverity_check_hash_algs()
249 		BUG_ON(alg->digest_size != hash_digest_size[alg->algo_id]);  in fsverity_check_hash_algs()