The function is now UDP-specific, the protocol is always IPPROTO_UDP.

This is similar to what already done for IPv4 in commit 78f3655adcb5
("ipv4: remove "proto" argument from udp_tunnel_dst_lookup()").

Suggested-by: Guillaume Nault <gnault@redhat.com>
Signed-off-by: Beniamino Galvani <b.galvani@gmail.com>
---
 drivers/net/bareudp.c     | 5 ++---
 include/net/udp_tunnel.h  | 2 +-
 net/ipv6/ip6_udp_tunnel.c | 4 +---
 3 files changed, 4 insertions(+), 7 deletions(-)

diff --git a/drivers/net/bareudp.c b/drivers/net/bareudp.c
index 9a0a1a9f6cfe..9eb5e11c09b4 100644
--- a/drivers/net/bareudp.c
+++ b/drivers/net/bareudp.c
@@ -372,7 +372,7 @@ static int bareudp6_xmit_skb(struct sk_buff *skb, struct net_device *dev,
 		return -ESHUTDOWN;
 
 	dst = udp_tunnel6_dst_lookup(skb, dev, bareudp->net, sock, &saddr, info,
-				     IPPROTO_UDP, use_cache);
+				     use_cache);
 	if (IS_ERR(dst))
 		return PTR_ERR(dst);
 
@@ -499,8 +499,7 @@ static int bareudp_fill_metadata_dst(struct net_device *dev,
 		struct socket *sock = rcu_dereference(bareudp->sock);
 
 		dst = udp_tunnel6_dst_lookup(skb, dev, bareudp->net, sock,
-					     &saddr, info, IPPROTO_UDP,
-					     use_cache);
+					     &saddr, info, use_cache);
 		if (IS_ERR(dst))
 			return PTR_ERR(dst);
 
diff --git a/include/net/udp_tunnel.h b/include/net/udp_tunnel.h
index 1dac296d8449..583867643bd1 100644
--- a/include/net/udp_tunnel.h
+++ b/include/net/udp_tunnel.h
@@ -175,7 +175,7 @@ struct dst_entry *udp_tunnel6_dst_lookup(struct sk_buff *skb,
 					 struct socket *sock,
 					 struct in6_addr *saddr,
 					 const struct ip_tunnel_info *info,
-					 u8 protocol, bool use_cache);
+					 bool use_cache);
 
 struct metadata_dst *udp_tun_rx_dst(struct sk_buff *skb, unsigned short family,
 				    __be16 flags, __be64 tunnel_id,
diff --git a/net/ipv6/ip6_udp_tunnel.c b/net/ipv6/ip6_udp_tunnel.c
index fc122abf6b75..b9c906518ce2 100644
--- a/net/ipv6/ip6_udp_tunnel.c
+++ b/net/ipv6/ip6_udp_tunnel.c
@@ -121,7 +121,6 @@ EXPORT_SYMBOL_GPL(udp_tunnel6_xmit_skb);
  *      @sock: Socket which provides route info
  *      @saddr: Memory to store the src ip address
  *      @info: Tunnel information
- *      @protocol: IP protocol
  *      @use_cache: Flag to enable cache usage
  *      This function performs a route lookup on a UDP tunnel
  *
@@ -135,7 +134,6 @@ struct dst_entry *udp_tunnel6_dst_lookup(struct sk_buff *skb,
 					 struct socket *sock,
 					 struct in6_addr *saddr,
 					 const struct ip_tunnel_info *info,
-					 u8 protocol,
 					 bool use_cache)
 {
 	struct dst_entry *dst = NULL;
@@ -155,7 +153,7 @@ struct dst_entry *udp_tunnel6_dst_lookup(struct sk_buff *skb,
 #endif
 	memset(&fl6, 0, sizeof(fl6));
 	fl6.flowi6_mark = skb->mark;
-	fl6.flowi6_proto = protocol;
+	fl6.flowi6_proto = IPPROTO_UDP;
 	fl6.daddr = info->key.u.ipv6.dst;
 	fl6.saddr = info->key.u.ipv6.src;
 	prio = info->key.tos;
-- 
2.40.1

On 10/20/23 5:55 AM, Beniamino Galvani wrote:
> The function is now UDP-specific, the protocol is always IPPROTO_UDP.
> 
> This is similar to what already done for IPv4 in commit 78f3655adcb5
> ("ipv4: remove "proto" argument from udp_tunnel_dst_lookup()").
> 
> Suggested-by: Guillaume Nault <gnault@redhat.com>
> Signed-off-by: Beniamino Galvani <b.galvani@gmail.com>
> ---
>  drivers/net/bareudp.c     | 5 ++---
>  include/net/udp_tunnel.h  | 2 +-
>  net/ipv6/ip6_udp_tunnel.c | 4 +---
>  3 files changed, 4 insertions(+), 7 deletions(-)
> 

Reviewed-by: David Ahern <dsahern@kernel.org>