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udp: Remove dead check in __udp[46]_lib_lookup() for BPF.

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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>
Link: https://patch.msgid.link/20260311052020.1213705-13-kuniyu@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Kuniyuki Iwashima 2026-03-11 05:19:59 +00:00 committed by Jakub Kicinski
parent c570bd25d8
commit 5a88b2810f
2 changed files with 2 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
net/ipv4/udp.c
View File

@ -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);

3
net/ipv6/udp.c
View File

@ -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);