From: Jakub Kicinski kuba@kernel.org
Add basic XDP support by hooking in do_xdp_generic(). This should be enough to validate most basic XDP tests.
Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Mohsin Bashir mohsin.bashr@gmail.com --- drivers/net/netdevsim/netdev.c | 19 ++++++++++++++++++- 1 file changed, 18 insertions(+), 1 deletion(-)
diff --git a/drivers/net/netdevsim/netdev.c b/drivers/net/netdevsim/netdev.c index 611e7f65291c..ba637bd0971a 100644 --- a/drivers/net/netdevsim/netdev.c +++ b/drivers/net/netdevsim/netdev.c @@ -387,15 +387,32 @@ static int nsim_get_iflink(const struct net_device *dev) static int nsim_rcv(struct nsim_rq *rq, int budget) { struct net_device *dev = rq->napi.dev; + struct bpf_prog *xdp_prog; + struct netdevsim *ns; struct sk_buff *skb; unsigned int skblen; int i, ret;
+ ns = netdev_priv(dev); + xdp_prog = READ_ONCE(ns->xdp.prog); + for (i = 0; i < budget; i++) { if (skb_queue_empty(&rq->skb_queue)) break;
skb = skb_dequeue(&rq->skb_queue); + + if (xdp_prog) { + /* skb might be freed directly by XDP, save the len */ + skblen = skb->len; + + ret = do_xdp_generic(xdp_prog, &skb); + if (ret != XDP_PASS) { + dev_dstats_rx_add(dev, skblen); + continue; + } + } + /* skb might be discard at netif_receive_skb, save the len */ skblen = skb->len; skb_mark_napi_id(skb, &rq->napi); @@ -936,7 +953,7 @@ static void nsim_setup(struct net_device *dev) NETIF_F_TSO; dev->pcpu_stat_type = NETDEV_PCPU_STAT_DSTATS; dev->max_mtu = ETH_MAX_MTU; - dev->xdp_features = NETDEV_XDP_ACT_HW_OFFLOAD; + dev->xdp_features = NETDEV_XDP_ACT_BASIC | NETDEV_XDP_ACT_HW_OFFLOAD; }
static int nsim_queue_init(struct netdevsim *ns)