xfs_efi_log_format_64
return sizeof(struct xfs_efi_log_format_64) +
XFS_CHECK_STRUCT_SIZE(struct xfs_efi_log_format_64, 16);
XFS_CHECK_OFFSET(struct xfs_efi_log_format_64, efi_extents, 16);
struct xfs_efi_log_format_64 *src_efi_fmt_64 = buf->iov_base;