| Message ID | 76873d384e21288abe5767551a0799ac93ec07fb.1658759380.git.paul@isovalent.com (mailing list archive) |
|---|---|
| State | Accepted |
| Commit | b8fff748521c7178b9a7d32b5a34a81cec8396f3 |
| Delegated to: | BPF |
| Headers | show |
| Series | bpf: Allow any source IP in bpf_skb_set_tunnel_key | expand |
diff --git a/net/core/filter.c b/net/core/filter.c index 57c5e4c4efd2..dffc7dcda96a 100644 --- a/net/core/filter.c +++ b/net/core/filter.c @@ -4653,6 +4653,7 @@ BPF_CALL_4(bpf_skb_set_tunnel_key, struct sk_buff *, skb, } else { info->key.u.ipv4.dst = cpu_to_be32(from->remote_ipv4); info->key.u.ipv4.src = cpu_to_be32(from->local_ipv4); + info->key.flow_flags = FLOWI_FLAG_ANYSRC; } return 0;
Commit 26101f5ab6bd ("bpf: Add source ip in "struct bpf_tunnel_key"") added support for getting and setting the outer source IP of encapsulated packets via the bpf_skb_{get,set}_tunnel_key BPF helper. This change allows BPF programs to set any IP address as the source, including for example the IP address of a container running on the same host. In that last case, however, the encapsulated packets are dropped when looking up the route because the source IP address isn't assigned to any interface on the host. To avoid this, we need to set the FLOWI_FLAG_ANYSRC flag. Fixes: 26101f5ab6bd ("bpf: Add source ip in "struct bpf_tunnel_key"") Acked-by: Martin KaFai Lau <kafai@fb.com> Reviewed-by: Nikolay Aleksandrov <razor@blackwall.org> Signed-off-by: Paul Chaignon <paul@isovalent.com> --- net/core/filter.c | 1 + 1 file changed, 1 insertion(+)