copy_extent_buffer_full
copy_extent_buffer_full(cow, buf);
copy_extent_buffer_full(cow, buf);
copy_extent_buffer_full(new, src);
void copy_extent_buffer_full(const struct extent_buffer *dst,
copy_extent_buffer_full(clone, path->nodes[0]);
copy_extent_buffer_full(ctx->scratch_eb, path->nodes[0]);