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veth: Support RX XDP metadata

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The goal is to enable end-to-end testing of the metadata for AF_XDP.

Cc: John Fastabend <john.fastabend@gmail.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Martin KaFai Lau <martin.lau@linux.dev>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Willem de Bruijn <willemb@google.com>
Cc: Jesper Dangaard Brouer <brouer@redhat.com>
Cc: Anatoly Burakov <anatoly.burakov@intel.com>
Cc: Alexander Lobakin <alexandr.lobakin@intel.com>
Cc: Magnus Karlsson <magnus.karlsson@gmail.com>
Cc: Maryam Tahhan <mtahhan@redhat.com>
Cc: xdp-hints@xdp-project.net
Cc: netdev@vger.kernel.org
Signed-off-by: Stanislav Fomichev <sdf@google.com>
Link: https://lore.kernel.org/r/20230119221536.3349901-11-sdf@google.com
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
This commit is contained in:
Stanislav Fomichev 2023-01-19 14:15:29 -08:00 committed by Martin KaFai Lau
parent fefb695a74
commit 306531f024
1 changed files with 31 additions and 0 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

31
drivers/net/veth.c
View file

@ -118,6 +118,7 @@ static struct {
struct veth_xdp_buff {
struct xdp_buff xdp;
struct sk_buff *skb;
};
static int veth_get_link_ksettings(struct net_device *dev,
@ -602,6 +603,7 @@ static struct xdp_frame *veth_xdp_rcv_one(struct veth_rq *rq,
xdp_convert_frame_to_buff(frame, xdp);
xdp->rxq = &rq->xdp_rxq;
vxbuf.skb = NULL;
act = bpf_prog_run_xdp(xdp_prog, xdp);
@ -823,6 +825,7 @@ static struct sk_buff *veth_xdp_rcv_skb(struct veth_rq *rq,
__skb_push(skb, skb->data - skb_mac_header(skb));
if (veth_convert_skb_to_xdp_buff(rq, xdp, &skb))
goto drop;
vxbuf.skb = skb;
orig_data = xdp->data;
orig_data_end = xdp->data_end;
@ -1602,6 +1605,28 @@ static int veth_xdp(struct net_device *dev, struct netdev_bpf *xdp)
}
}
static int veth_xdp_rx_timestamp(const struct xdp_md *ctx, u64 *timestamp)
{
struct veth_xdp_buff *_ctx = (void *)ctx;
if (!_ctx->skb)
return -EOPNOTSUPP;
*timestamp = skb_hwtstamps(_ctx->skb)->hwtstamp;
return 0;
}
static int veth_xdp_rx_hash(const struct xdp_md *ctx, u32 *hash)
{
struct veth_xdp_buff *_ctx = (void *)ctx;
if (!_ctx->skb)
return -EOPNOTSUPP;
*hash = skb_get_hash(_ctx->skb);
return 0;
}
static const struct net_device_ops veth_netdev_ops = {
.ndo_init = veth_dev_init,
.ndo_open = veth_open,
@ -1623,6 +1648,11 @@ static const struct net_device_ops veth_netdev_ops = {
.ndo_get_peer_dev = veth_peer_dev,
};
static const struct xdp_metadata_ops veth_xdp_metadata_ops = {
.xmo_rx_timestamp = veth_xdp_rx_timestamp,
.xmo_rx_hash = veth_xdp_rx_hash,
};
#define VETH_FEATURES (NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_HW_CSUM | \
NETIF_F_RXCSUM | NETIF_F_SCTP_CRC | NETIF_F_HIGHDMA | \
NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ENCAP_ALL | \
@ -1639,6 +1669,7 @@ static void veth_setup(struct net_device *dev)
dev->priv_flags |= IFF_PHONY_HEADROOM;
dev->netdev_ops = &veth_netdev_ops;
dev->xdp_metadata_ops = &veth_xdp_metadata_ops;
dev->ethtool_ops = &veth_ethtool_ops;
dev->features |= NETIF_F_LLTX;
dev->features |= VETH_FEATURES;