Re: [PATCH net-next] net: ipip: use tunnel parameters for fill_forward_path route lookup

Pass source address, DSCP and output interface from the tunnel
configuration to ip_route_output() in ipip_fill_forward_path(), aligning
the route lookup with the slow path in ipip_tunnel_xmit().

Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
---
 net/ipv4/ipip.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/net/ipv4/ipip.c b/net/ipv4/ipip.c
index b643194f57d2..d1aa048a6099 100644
--- a/net/ipv4/ipip.c
+++ b/net/ipv4/ipip.c

@@ -360,8 +360,9 @@ static int ipip_fill_forward_path(struct net_device_path_ctx *ctx,
 	const struct iphdr *tiph = &tunnel->parms.iph;
 	struct rtable *rt;
 
-	rt = ip_route_output(dev_net(ctx->dev), tiph->daddr, 0, 0, 0,
-			     RT_SCOPE_UNIVERSE);
+	rt = ip_route_output(dev_net(ctx->dev), tiph->daddr, tiph->saddr,
+			     inet_dsfield_to_dscp(tiph->tos),
+			     tunnel->parms.link, RT_SCOPE_UNIVERSE);
 	if (IS_ERR(rt))
 		return PTR_ERR(rt);
 

---
base-commit: 155c68aef2397f8c5d72ef10acf48ae159bf1869
change-id: 20260708-ipip-route-lookup-fill_forward_path-6a8a1f45084c

Best regards,