> When the PMD is configured to load a custom XDP program, it sets
> XSK_LIBBPF_FLAGS__INHIBIT_PROG_LOAD flag to prevent libbpf from
> loading its default XDP program. However, when queue_count is set to
> greater than 1, this flag is only set for the first XSK socket but not
> for subsequent XSK sockets. This causes XSK socket creation failure.
>
> This commit ensures that XSK_LIBBPF_FLAGS__INHIBIT_PROG_LOAD flag is
> set for all XSK socket creations when custom XDP program is being used.
>
> Fixes: 01fa83c94d7e ("net/af_xdp: workaround custom program loading")
>
> Signed-off-by: Junxiao Shi <g...@mail1.yoursunny.com>
Thanks for the patch!
It's probably too late to make it into 22.03 but cc-ing stable as it should be
backported to 21.11.x.
Acked-by: Ciara Loftus <ciara.lof...@intel.com>
> ---
> drivers/net/af_xdp/rte_eth_af_xdp.c | 23 ++++++++++++-----------
> 1 file changed, 12 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/net/af_xdp/rte_eth_af_xdp.c
> b/drivers/net/af_xdp/rte_eth_af_xdp.c
> index 65479138d3..9920f49870 100644
> --- a/drivers/net/af_xdp/rte_eth_af_xdp.c
> +++ b/drivers/net/af_xdp/rte_eth_af_xdp.c
> @@ -1307,18 +1307,19 @@ xsk_configure(struct pmd_internals *internals,
> struct pkt_rx_queue *rxq,
> cfg.bind_flags |= XDP_USE_NEED_WAKEUP;
> #endif
>
> - if (strnlen(internals->prog_path, PATH_MAX) &&
> - !internals->custom_prog_configured) {
> - ret = load_custom_xdp_prog(internals->prog_path,
> - internals->if_index,
> - &internals->map);
> - if (ret) {
> - AF_XDP_LOG(ERR, "Failed to load custom XDP
> program %s\n",
> - internals->prog_path);
> - goto out_umem;
> + if (strnlen(internals->prog_path, PATH_MAX)) {
> + if (!internals->custom_prog_configured) {
> + ret = load_custom_xdp_prog(internals->prog_path,
> + internals->if_index,
> + &internals->map);
> + if (ret) {
> + AF_XDP_LOG(ERR, "Failed to load custom
> XDP program %s\n",
> + internals->prog_path);
> + goto out_umem;
> + }
> + internals->custom_prog_configured = 1;
> }
> - internals->custom_prog_configured = 1;
> - cfg.libbpf_flags =
> XSK_LIBBPF_FLAGS__INHIBIT_PROG_LOAD;
> + cfg.libbpf_flags |=
> XSK_LIBBPF_FLAGS__INHIBIT_PROG_LOAD;
> }
>
> if (internals->shared_umem)
> --
> 2.17.1
