On Fri, Mar 15, 2024 at 7:23 AM Tushar Vyavahare
<tushar.vyavahare@xxxxxxxxx> wrote:
>
> Introduce a new function called set_hw_ring_size that allows for the
> dynamic configuration of the ring size within the interface.
>
> Signed-off-by: Tushar Vyavahare <tushar.vyavahare@xxxxxxxxx>
> ---
> tools/testing/selftests/bpf/xskxceiver.c | 35 ++++++++++++++++++++++++
> 1 file changed, 35 insertions(+)
>
> diff --git a/tools/testing/selftests/bpf/xskxceiver.c b/tools/testing/selftests/bpf/xskxceiver.c
> index 32005bfb9c9f..aafa78307586 100644
> --- a/tools/testing/selftests/bpf/xskxceiver.c
> +++ b/tools/testing/selftests/bpf/xskxceiver.c
> @@ -441,6 +441,41 @@ static int get_hw_ring_size(struct ifobject *ifobj)
> return 0;
> }
>
> +static int set_hw_ring_size(struct ifobject *ifobj, u32 tx, u32 rx)
> +{
> + struct ethtool_ringparam ring_param = {0};
> + struct ifreq ifr = {0};
> + int sockfd, ret;
> + u32 ctr = 0;
> +
> + sockfd = socket(AF_INET, SOCK_DGRAM, 0);
> + if (sockfd < 0)
> + return errno;
> +
> + memcpy(ifr.ifr_name, ifobj->ifname, sizeof(ifr.ifr_name));
> +
> + ring_param.tx_pending = tx;
> + ring_param.rx_pending = rx;
> +
> + ring_param.cmd = ETHTOOL_SRINGPARAM;
> + ifr.ifr_data = (char *)&ring_param;
> +
> + while (ctr++ < SOCK_RECONF_CTR) {
> + ret = ioctl(sockfd, SIOCETHTOOL, &ifr);
> + if (!ret)
> + break;
> + /* Retry if it fails */
> + if (ctr >= SOCK_RECONF_CTR) {
> + close(sockfd);
> + return errno;
> + }
> + usleep(USLEEP_MAX);
Does it really have to sleep or copy paste from other places?
This ioctl() is supposed to do synchronous config, no?
