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vxlan: Use ip_tunnel_key flow flags in route lookups 

Use the new ip_tunnel_key field with the flow flags in the IPv4 route
lookups for the encapsulated packet. This will be used by the
bpf_skb_set_tunnel_key helper in a subsequent commit.

Signed-off-by: Paul Chaignon <paul@isovalent.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Reviewed-by: Nikolay Aleksandrov <razor@blackwall.org>
Acked-by: Martin KaFai Lau <kafai@fb.com>
Link: https://lore.kernel.org/bpf/1ffc95c3d60182fd5ec0cf6602083f8f68afe98f.1658759380.git.paul@isovalent.com
This commit is contained in:
Paul Chaignon 2022-07-25 16:31:58 +02:00 committed by Daniel Borkmann
parent 451ef36bd2
commit 7e2fb8bc7e
1 changed files with 7 additions and 4 deletions
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11
drivers/net/vxlan/vxlan_core.c
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@ -2243,7 +2243,7 @@ static struct rtable *vxlan_get_route(struct vxlan_dev *vxlan, struct net_device
struct vxlan_sock *sock4,
struct sk_buff *skb, int oif, u8 tos,
__be32 daddr, __be32 *saddr, __be16 dport, __be16 sport,
struct dst_cache *dst_cache,
__u8 flow_flags, struct dst_cache *dst_cache,
const struct ip_tunnel_info *info)
{
bool use_cache = ip_tunnel_dst_cache_usable(skb, info);
@ -2270,6 +2270,7 @@ static struct rtable *vxlan_get_route(struct vxlan_dev *vxlan, struct net_device
fl4.saddr = *saddr;
fl4.fl4_dport = dport;
fl4.fl4_sport = sport;
fl4.flowi4_flags = flow_flags;
rt = ip_route_output_key(vxlan->net, &fl4);
if (!IS_ERR(rt)) {
@ -2459,7 +2460,7 @@ static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev,
unsigned int pkt_len = skb->len;
__be16 src_port = 0, dst_port;
struct dst_entry *ndst = NULL;
__u8 tos, ttl;
__u8 tos, ttl, flow_flags = 0;
int ifindex;
int err;
u32 flags = vxlan->cfg.flags;
@ -2525,6 +2526,7 @@ static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev,
}
dst = &remote_ip;
dst_port = info->key.tp_dst ? : vxlan->cfg.dst_port;
flow_flags = info->key.flow_flags;
vni = tunnel_id_to_key32(info->key.tun_id);
ifindex = 0;
dst_cache = &info->dst_cache;
@ -2555,7 +2557,7 @@ static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev,
rt = vxlan_get_route(vxlan, dev, sock4, skb, ifindex, tos,
dst->sin.sin_addr.s_addr,
&local_ip.sin.sin_addr.s_addr,
dst_port, src_port,
dst_port, src_port, flow_flags,
dst_cache, info);
if (IS_ERR(rt)) {
err = PTR_ERR(rt);
@ -3061,7 +3063,8 @@ static int vxlan_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb)
rt = vxlan_get_route(vxlan, dev, sock4, skb, 0, info->key.tos,
info->key.u.ipv4.dst,
&info->key.u.ipv4.src, dport, sport,
&info->dst_cache, info);
info->key.flow_flags, &info->dst_cache,
info);
if (IS_ERR(rt))
return PTR_ERR(rt);
ip_rt_put(rt);