hash_function(map.data, map.size, file_hash);
ret = hash_compare(file_hash, aft_hash);
para_munmap(map.data, map.size);
if (ret) {
ret = -E_HASH_MISMATCH;
hash_function(map.data, map.size, file_hash);
ret = hash_compare(file_hash, aft_hash);
para_munmap(map.data, map.size);
if (ret) {
ret = -E_HASH_MISMATCH;