From 6dd514f48110ebb4bf36875b9e7e02d07b589caa Mon Sep 17 00:00:00 2001 From: Michal Swiatkowski Date: Wed, 27 Mar 2024 16:23:56 +0100 Subject: pfcp: always set pfcp metadata In PFCP receive path set metadata needed by flower code to do correct classification based on this metadata. Signed-off-by: Michal Swiatkowski Signed-off-by: Marcin Szycik Reviewed-by: Simon Horman Signed-off-by: Alexander Lobakin Signed-off-by: David S. Miller --- drivers/net/pfcp.c | 81 +++++++++++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 80 insertions(+), 1 deletion(-) (limited to 'drivers') diff --git a/drivers/net/pfcp.c b/drivers/net/pfcp.c index 3f1ee0ae7111..cc5b28c5f99f 100644 --- a/drivers/net/pfcp.c +++ b/drivers/net/pfcp.c @@ -21,6 +21,8 @@ struct pfcp_dev { struct socket *sock; struct net_device *dev; struct net *net; + + struct gro_cells gro_cells; }; static unsigned int pfcp_net_id __read_mostly; @@ -29,6 +31,78 @@ struct pfcp_net { struct list_head pfcp_dev_list; }; +static void +pfcp_session_recv(struct pfcp_dev *pfcp, struct sk_buff *skb, + struct pfcp_metadata *md) +{ + struct pfcphdr_session *unparsed = pfcp_hdr_session(skb); + + md->seid = unparsed->seid; + md->type = PFCP_TYPE_SESSION; +} + +static void +pfcp_node_recv(struct pfcp_dev *pfcp, struct sk_buff *skb, + struct pfcp_metadata *md) +{ + md->type = PFCP_TYPE_NODE; +} + +static int pfcp_encap_recv(struct sock *sk, struct sk_buff *skb) +{ + IP_TUNNEL_DECLARE_FLAGS(flags) = { }; + struct metadata_dst *tun_dst; + struct pfcp_metadata *md; + struct pfcphdr *unparsed; + struct pfcp_dev *pfcp; + + if (unlikely(!pskb_may_pull(skb, PFCP_HLEN))) + goto drop; + + pfcp = rcu_dereference_sk_user_data(sk); + if (unlikely(!pfcp)) + goto drop; + + unparsed = pfcp_hdr(skb); + + ip_tunnel_flags_zero(flags); + tun_dst = udp_tun_rx_dst(skb, sk->sk_family, flags, 0, + sizeof(*md)); + if (unlikely(!tun_dst)) + goto drop; + + md = ip_tunnel_info_opts(&tun_dst->u.tun_info); + if (unlikely(!md)) + goto drop; + + if (unparsed->flags & PFCP_SEID_FLAG) + pfcp_session_recv(pfcp, skb, md); + else + pfcp_node_recv(pfcp, skb, md); + + __set_bit(IP_TUNNEL_PFCP_OPT_BIT, flags); + ip_tunnel_info_opts_set(&tun_dst->u.tun_info, md, sizeof(*md), + flags); + + if (unlikely(iptunnel_pull_header(skb, PFCP_HLEN, skb->protocol, + !net_eq(sock_net(sk), + dev_net(pfcp->dev))))) + goto drop; + + skb_dst_set(skb, (struct dst_entry *)tun_dst); + + skb_reset_network_header(skb); + skb_reset_mac_header(skb); + skb->dev = pfcp->dev; + + gro_cells_receive(&pfcp->gro_cells, skb); + + return 0; +drop: + kfree_skb(skb); + return 0; +} + static void pfcp_del_sock(struct pfcp_dev *pfcp) { udp_tunnel_sock_release(pfcp->sock); @@ -39,6 +113,7 @@ static void pfcp_dev_uninit(struct net_device *dev) { struct pfcp_dev *pfcp = netdev_priv(dev); + gro_cells_destroy(&pfcp->gro_cells); pfcp_del_sock(pfcp); } @@ -48,7 +123,7 @@ static int pfcp_dev_init(struct net_device *dev) pfcp->dev = dev; - return 0; + return gro_cells_init(&pfcp->gro_cells, dev); } static const struct net_device_ops pfcp_netdev_ops = { @@ -94,6 +169,10 @@ static struct socket *pfcp_create_sock(struct pfcp_dev *pfcp) if (err) return ERR_PTR(err); + tuncfg.sk_user_data = pfcp; + tuncfg.encap_rcv = pfcp_encap_recv; + tuncfg.encap_type = 1; + setup_udp_tunnel_sock(net, sock, &tuncfg); return sock; -- cgit v1.2.3