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xen networking: add XDP offset adjustment to xen-netback

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the patch basically adds the offset adjustment and netfront
state reading to make XDP work on netfront side.

Reviewed-by: Paul Durrant <paul@xen.org>
Signed-off-by: Denis Kirjanov <kda@linux-powerpc.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Denis Kirjanov
2020-06-29 16:13:29 +03:00
committed by David S. Miller
parent 6c5aa6fc4d
commit 1c9535c701
5 changed files with 61 additions and 1 deletions
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15
drivers/net/xen-netback/rx.c
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@@ -258,6 +258,19 @@ static void xenvif_rx_next_skb(struct xenvif_queue *queue,
pkt->extra_count++;
}
if (queue->vif->xdp_headroom) {
struct xen_netif_extra_info *extra;
extra = &pkt->extras[XEN_NETIF_EXTRA_TYPE_XDP - 1];
memset(extra, 0, sizeof(struct xen_netif_extra_info));
extra->u.xdp.headroom = queue->vif->xdp_headroom;
extra->type = XEN_NETIF_EXTRA_TYPE_XDP;
extra->flags = 0;
pkt->extra_count++;
}
if (skb->sw_hash) {
struct xen_netif_extra_info *extra;
@@ -356,7 +369,7 @@ static void xenvif_rx_data_slot(struct xenvif_queue *queue,
struct xen_netif_rx_request *req,
struct xen_netif_rx_response *rsp)
{
unsigned int offset = 0;
unsigned int offset = queue->vif->xdp_headroom;
unsigned int flags;
do {