[PATCH v2 net-next 12/15] udp: Remove dead check in __udp[46]_lib_lookup() for BPF.

[Kuniyuki Iwashima <kuniyu@google.com>]

BPF socket lookup for SO_REUSEPORT does not support UDP-Lite.

In __udp4_lib_lookup() and __udp6_lib_lookup(), it checks if
the passed udptable pointer is the same as net->ipv4.udp_table,
which is only true for UDP.

Now, the condition is always true.

Let's remove the check.

Signed-off-by: Kuniyuki Iwashima <kuniyu@google.com>
Reviewed-by: Willem de Bruijn <willemb@google.com>
---
 net/ipv4/udp.c | 3 +--
 net/ipv6/udp.c | 3 +--
 2 files changed, 2 insertions(+), 4 deletions(-)

diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index 5ae0d88e3cca..86765a17de67 100644
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -699,8 +699,7 @@ struct sock *__udp4_lib_lookup(const struct net *net, __be32 saddr,
 		goto done;
 
 	/* Lookup redirect from BPF */
-	if (static_branch_unlikely(&bpf_sk_lookup_enabled) &&
-	    udptable == net->ipv4.udp_table) {
+	if (static_branch_unlikely(&bpf_sk_lookup_enabled)) {
 		sk = inet_lookup_run_sk_lookup(net, IPPROTO_UDP, skb, sizeof(struct udphdr),
 					       saddr, sport, daddr, hnum, dif,
 					       udp_ehashfn);
diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index 54b5a92b04d0..fb50dcf8a384 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -370,8 +370,7 @@ struct sock *__udp6_lib_lookup(const struct net *net,
 		goto done;
 
 	/* Lookup redirect from BPF */
-	if (static_branch_unlikely(&bpf_sk_lookup_enabled) &&
-	    udptable == net->ipv4.udp_table) {
+	if (static_branch_unlikely(&bpf_sk_lookup_enabled)) {
 		sk = inet6_lookup_run_sk_lookup(net, IPPROTO_UDP, skb, sizeof(struct udphdr),
 						saddr, sport, daddr, hnum, dif,
 						udp6_ehashfn);
-- 
2.53.0.473.g4a7958ca14-goog