On Mon, Jun 14, 2021 at 5:50 AM Lorenzo Bianconi <lorenzo@xxxxxxxxxx> wrote: > > Introduce flags field in xdp_frame/xdp_buffer data structure > to define additional buffer features. At the moment the only > supported buffer feature is multi-buffer bit (mb). Multi-buffer bit > is used to specify if this is a linear buffer (mb = 0) or a multi-buffer > frame (mb = 1). In the latter case the shared_info area at the end of > the first buffer will be properly initialized to link together > subsequent buffers. > > Signed-off-by: Lorenzo Bianconi <lorenzo@xxxxxxxxxx> Instead of passing this between buffers and frames I wonder if this wouldn't be better to place in something like the xdp_mem_info structure since this is something that would be specific to how the device is handling memory anyway. You could probably split the type field into a 16b type and a 16b flags field. Then add your bit where 0 is linear/legacy and 1 is scatter-gather/multi-buffer.
