[PATCH v4] net/af_xdp: re-enable secondary process support

[Ferruh Yigit]

On 2/9/2022 9:48 AM, Ciara Loftus wrote:
> Secondary process support had been disabled for the AF_XDP PMD because
> there was no logic in place to share the AF_XDP socket file descriptors
> between the processes. This commit introduces this logic using the IPC
> APIs.
> 
> Rx and Tx are disabled in the secondary process due to memory mapping of
> the AF_XDP rings being assigned by the kernel in the primary process only.
> However other operations including retrieval of stats are permitted.
> 
> Signed-off-by: Ciara Loftus <ciara.loftus at intel.com>
> 

Hi Ciara,

When I tried to test the patch getting following error [1], it doesn't look
related to this patch but can you help to fix the issue, thanks.

[1]
libxdp: Couldn't find a BPF file with name xsk_def_xdp_prog.o
xsk_configure(): Failed to create xsk socket.
eth_rx_queue_setup(): Failed to configure xdp socket
Fail to configure port 2 rx queues
EAL: Error - exiting with code: 1