[PATCH v1 net-next 12/15] udp: Remove dead check in __udp[46]_lib_lookup() for BPF.
From: Kuniyuki Iwashima <kuniyu@google.com>
Date: 2026-03-04 19:30:57
Subsystem:
networking [general], the rest, user datagram protocol (udp) · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds, Willem de Bruijn
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> --- 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 6076e20f46f0..5b445779b0a0 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