ZSTD_BTRFS_MAX_INPUT
zstd_get_btrfs_parameters(level, ZSTD_BTRFS_MAX_INPUT);
zstd_dstream_workspace_bound(ZSTD_BTRFS_MAX_INPUT));
WARN_ON(src_len > ZSTD_BTRFS_MAX_INPUT);
ZSTD_BTRFS_MAX_INPUT, workspace->mem, workspace->size);
ZSTD_BTRFS_MAX_INPUT, workspace->mem, workspace->size);