Commit 2863d665 authored by Magnus Karlsson's avatar Magnus Karlsson Committed by Alexei Starovoitov
Browse files

xsk: support redirect to any socket bound to the same umem 



Add support for directing a packet to any socket bound to the same
umem. This makes it possible to use the XDP program to select what
socket the packet should be received on. The user can populate the
XSKMAP with various sockets and as long as they share the same umem,
the XDP program can pick any one of them.

Suggested-by: default avatarYuval El-Hanany <yuvale@radware.com>
Signed-off-by: default avatarMagnus Karlsson <magnus.karlsson@intel.com>
Reviewed-by: default avatarWillem de Bruijn <willemb@google.com>
Link: https://lore.kernel.org/r/20240205123553.22180-2-magnus.karlsson@gmail.com


Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
parent 20a286c1

net/xdp/xsk.c

+4 −1
Original line number Diff line number Diff line
@@ -313,10 +313,13 @@ static bool xsk_is_bound(struct xdp_sock *xs) 


static int xsk_rcv_check(struct xdp_sock *xs, struct xdp_buff *xdp, u32 len)

{

	struct net_device *dev = xdp->rxq->dev;

	u32 qid = xdp->rxq->queue_index;



	if (!xsk_is_bound(xs))

		return -ENXIO;



	if (xs->dev != xdp->rxq->dev || xs->queue_id != xdp->rxq->queue_index)

	if (!dev->_rx[qid].pool || xs->umem != dev->_rx[qid].pool->umem)

		return -EINVAL;



	if (len > xsk_pool_get_rx_frame_size(xs->pool) && !xs->sg) {