28 int fsverity_init_merkle_tree_params(struct merkle_tree_params *params,  in fsverity_init_merkle_tree_params()  argument
40 	memset(params, 0, sizeof(*params));  in fsverity_init_merkle_tree_params()
45 	params->hash_alg = hash_alg;  in fsverity_init_merkle_tree_params()
46 	params->digest_size = hash_alg->digest_size;  in fsverity_init_merkle_tree_params()
48 	params->hashstate = fsverity_prepare_hash_state(hash_alg, salt,  in fsverity_init_merkle_tree_params()
50 	if (IS_ERR(params->hashstate)) {  in fsverity_init_merkle_tree_params()
51 		err = PTR_ERR(params->hashstate);  in fsverity_init_merkle_tree_params()
52 		params->hashstate = NULL;  in fsverity_init_merkle_tree_params()
63 	params->log_blocksize = log_blocksize;  in fsverity_init_merkle_tree_params()
64 	params->block_size = 1 << log_blocksize;  in fsverity_init_merkle_tree_params()
66 	if (WARN_ON(!is_power_of_2(params->digest_size))) {  in fsverity_init_merkle_tree_params()
70 	if (params->block_size < 2 * params->digest_size) {  in fsverity_init_merkle_tree_params()
73 			      params->block_size, hash_alg->name);  in fsverity_init_merkle_tree_params()
77 	params->log_arity = params->log_blocksize - ilog2(params->digest_size);  in fsverity_init_merkle_tree_params()
78 	params->hashes_per_block = 1 << params->log_arity;  in fsverity_init_merkle_tree_params()
81 		 hash_alg->name, params->block_size, params->hashes_per_block,  in fsverity_init_merkle_tree_params()
92 	blocks = (inode->i_size + params->block_size - 1) >> log_blocksize;  in fsverity_init_merkle_tree_params()
95 		if (params->num_levels >= FS_VERITY_MAX_LEVELS) {  in fsverity_init_merkle_tree_params()
100 		blocks = (blocks + params->hashes_per_block - 1) >>  in fsverity_init_merkle_tree_params()
101 			 params->log_arity;  in fsverity_init_merkle_tree_params()
103 		params->level_start[params->num_levels++] = blocks;  in fsverity_init_merkle_tree_params()
108 	for (level = (int)params->num_levels - 1; level >= 0; level--) {  in fsverity_init_merkle_tree_params()
109 		blocks = params->level_start[level];  in fsverity_init_merkle_tree_params()
110 		params->level_start[level] = offset;  in fsverity_init_merkle_tree_params()
116 	params->tree_size = offset << log_blocksize;  in fsverity_init_merkle_tree_params()
120 	kfree(params->hashstate);  in fsverity_init_merkle_tree_params()
121 	memset(params, 0, sizeof(*params));  in fsverity_init_merkle_tree_params()