ZK_OPTIONAL
{"props", DATA_TYPE_NVLIST, ZK_OPTIONAL},
{"hidden_args", DATA_TYPE_NVLIST, ZK_OPTIONAL},
{"props", DATA_TYPE_NVLIST, ZK_OPTIONAL},
{"hidden_args", DATA_TYPE_NVLIST, ZK_OPTIONAL},
{"props", DATA_TYPE_NVLIST, ZK_OPTIONAL},
{"<keys>", DATA_TYPE_ANY, ZK_OPTIONAL | ZK_WILDCARDLIST},
{"defer", DATA_TYPE_BOOLEAN, ZK_OPTIONAL},
{"<property>...", DATA_TYPE_BOOLEAN, ZK_WILDCARDLIST | ZK_OPTIONAL},
{"hidden_args", DATA_TYPE_ANY, ZK_OPTIONAL},
{"sync", DATA_TYPE_BOOLEAN_VALUE, ZK_OPTIONAL},
{"instrlimit", DATA_TYPE_UINT64, ZK_OPTIONAL},
{"memlimit", DATA_TYPE_UINT64, ZK_OPTIONAL},
{ZPOOL_TRIM_RATE, DATA_TYPE_UINT64, ZK_OPTIONAL},
{ZPOOL_TRIM_SECURE, DATA_TYPE_BOOLEAN_VALUE, ZK_OPTIONAL},
{ZPOOL_WAIT_TAG, DATA_TYPE_UINT64, ZK_OPTIONAL},
{"target", DATA_TYPE_STRING, ZK_OPTIONAL},
{"cleanup_fd", DATA_TYPE_INT32, ZK_OPTIONAL},
{"fromsnap", DATA_TYPE_STRING, ZK_OPTIONAL},
{"largeblockok", DATA_TYPE_BOOLEAN, ZK_OPTIONAL},
{"embedok", DATA_TYPE_BOOLEAN, ZK_OPTIONAL},
{"compressok", DATA_TYPE_BOOLEAN, ZK_OPTIONAL},
{"rawok", DATA_TYPE_BOOLEAN, ZK_OPTIONAL},
{"resume_object", DATA_TYPE_UINT64, ZK_OPTIONAL},
{"resume_offset", DATA_TYPE_UINT64, ZK_OPTIONAL},
{"from", DATA_TYPE_STRING, ZK_OPTIONAL},
{"fromsnap", DATA_TYPE_STRING, ZK_OPTIONAL},
{"largeblockok", DATA_TYPE_BOOLEAN, ZK_OPTIONAL},
{"embedok", DATA_TYPE_BOOLEAN, ZK_OPTIONAL},
{"compressok", DATA_TYPE_BOOLEAN, ZK_OPTIONAL},
{"rawok", DATA_TYPE_BOOLEAN, ZK_OPTIONAL},
{"noop", DATA_TYPE_BOOLEAN, ZK_OPTIONAL},
{"crypt_cmd", DATA_TYPE_UINT64, ZK_OPTIONAL},
{"hidden_args", DATA_TYPE_NVLIST, ZK_OPTIONAL},
{"props", DATA_TYPE_NVLIST, ZK_OPTIONAL},
if (nvl_keys[k].zkey_flags & ZK_OPTIONAL)
if (nvl_keys[k].zkey_flags & ZK_OPTIONAL)