EVM_XATTR_HMAC
if (type == EVM_XATTR_HMAC) {
req_xattr_value_len, EVM_XATTR_HMAC, data,
data.hdr.xattr.sha1.type = EVM_XATTR_HMAC;
desc = init_desc(EVM_XATTR_HMAC, HASH_ALGO_SHA1);
hmac_add_misc(desc, inode, EVM_XATTR_HMAC, hmac_val);
if (type == EVM_XATTR_HMAC) {
case EVM_XATTR_HMAC:
xattr_data->data.type = EVM_XATTR_HMAC;
case EVM_XATTR_HMAC: