From: Kuniyuki Iwashima <kuniyu@google.com>
To: Willem de Bruijn <willemdebruijn.kernel@gmail.com>,
David Ahern <dsahern@kernel.org>,
"David S . Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>,
Jakub Kicinski <kuba@kernel.org>,
Paolo Abeni <pabeni@redhat.com>
Cc: Simon Horman <horms@kernel.org>, Florian Westphal <fw@strlen.de>,
Kuniyuki Iwashima <kuniyu@google.com>,
Kuniyuki Iwashima <kuni1840@gmail.com>,
netdev@vger.kernel.org, Willem de Bruijn <willemb@google.com>
Subject: [PATCH v3 net-next 13/15] udp: Don't pass udptable to IPv6 socket lookup functions.
Date: Wed, 11 Mar 2026 05:20:00 +0000 [thread overview]
Message-ID: <20260311052020.1213705-14-kuniyu@google.com> (raw)
In-Reply-To: <20260311052020.1213705-1-kuniyu@google.com>
Since UDP and UDP-Lite had dedicated socket hash tables for
each, we have had to pass the pointer down to many socket
lookup functions.
UDP-Lite gone, and we do not need to do that.
Let's fetch net->ipv4.udp_table only where needed in IPv6
stack: __udp6_lib_lookup() and __udp6_lib_mcast_deliver().
__udp6_lib_err() is renamed to udpv6_err() as its wrapper
is no longer needed.
Signed-off-by: Kuniyuki Iwashima <kuniyu@google.com>
Reviewed-by: Willem de Bruijn <willemb@google.com>
---
include/net/ipv6_stubs.h | 7 ++--
include/net/udp.h | 3 +-
net/core/filter.c | 3 +-
net/ipv4/udp_diag.c | 20 +++++-----
net/ipv6/udp.c | 82 ++++++++++++++++++----------------------
net/ipv6/udp_offload.c | 3 +-
6 files changed, 53 insertions(+), 65 deletions(-)
diff --git a/include/net/ipv6_stubs.h b/include/net/ipv6_stubs.h
index d3013e721b14..907681cecde8 100644
--- a/include/net/ipv6_stubs.h
+++ b/include/net/ipv6_stubs.h
@@ -83,10 +83,9 @@ struct ipv6_bpf_stub {
int (*inet6_bind)(struct sock *sk, struct sockaddr_unsized *uaddr, int addr_len,
u32 flags);
struct sock *(*udp6_lib_lookup)(const struct net *net,
- const struct in6_addr *saddr, __be16 sport,
- const struct in6_addr *daddr, __be16 dport,
- int dif, int sdif, struct udp_table *tbl,
- struct sk_buff *skb);
+ const struct in6_addr *saddr, __be16 sport,
+ const struct in6_addr *daddr, __be16 dport,
+ int dif, int sdif, struct sk_buff *skb);
int (*ipv6_setsockopt)(struct sock *sk, int level, int optname,
sockptr_t optval, unsigned int optlen);
int (*ipv6_getsockopt)(struct sock *sk, int level, int optname,
diff --git a/include/net/udp.h b/include/net/udp.h
index 76f401988353..adec74531ee1 100644
--- a/include/net/udp.h
+++ b/include/net/udp.h
@@ -449,8 +449,7 @@ struct sock *udp6_lib_lookup(const struct net *net,
struct sock *__udp6_lib_lookup(const struct net *net,
const struct in6_addr *saddr, __be16 sport,
const struct in6_addr *daddr, __be16 dport,
- int dif, int sdif, struct udp_table *tbl,
- struct sk_buff *skb);
+ int dif, int sdif, struct sk_buff *skb);
struct sock *udp6_lib_lookup_skb(const struct sk_buff *skb,
__be16 sport, __be16 dport);
int udp_read_skb(struct sock *sk, skb_read_actor_t recv_actor);
diff --git a/net/core/filter.c b/net/core/filter.c
index a77d23fe2359..04e2a3ad0340 100644
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -6897,8 +6897,7 @@ static struct sock *sk_lookup(struct net *net, struct bpf_sock_tuple *tuple,
sk = ipv6_bpf_stub->udp6_lib_lookup(net,
src6, tuple->ipv6.sport,
dst6, tuple->ipv6.dport,
- dif, sdif,
- net->ipv4.udp_table, NULL);
+ dif, sdif, NULL);
#endif
}
diff --git a/net/ipv4/udp_diag.c b/net/ipv4/udp_diag.c
index a010d05062a0..0899c60cce53 100644
--- a/net/ipv4/udp_diag.c
+++ b/net/ipv4/udp_diag.c
@@ -44,11 +44,11 @@ static int udp_dump_one(struct udp_table *tbl,
#if IS_ENABLED(CONFIG_IPV6)
else if (req->sdiag_family == AF_INET6)
sk = __udp6_lib_lookup(net,
- (struct in6_addr *)req->id.idiag_src,
- req->id.idiag_sport,
- (struct in6_addr *)req->id.idiag_dst,
- req->id.idiag_dport,
- req->id.idiag_if, 0, tbl, NULL);
+ (struct in6_addr *)req->id.idiag_src,
+ req->id.idiag_sport,
+ (struct in6_addr *)req->id.idiag_dst,
+ req->id.idiag_dport,
+ req->id.idiag_if, 0, NULL);
#endif
if (sk && !refcount_inc_not_zero(&sk->sk_refcnt))
sk = NULL;
@@ -185,11 +185,11 @@ static int __udp_diag_destroy(struct sk_buff *in_skb,
else
sk = __udp6_lib_lookup(net,
- (struct in6_addr *)req->id.idiag_dst,
- req->id.idiag_dport,
- (struct in6_addr *)req->id.idiag_src,
- req->id.idiag_sport,
- req->id.idiag_if, 0, tbl, NULL);
+ (struct in6_addr *)req->id.idiag_dst,
+ req->id.idiag_dport,
+ (struct in6_addr *)req->id.idiag_src,
+ req->id.idiag_sport,
+ req->id.idiag_if, 0, NULL);
}
#endif
else {
diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index 5ba399218d07..dd958e2b552b 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -344,9 +344,9 @@ static void udp6_hash4(struct sock *sk)
struct sock *__udp6_lib_lookup(const struct net *net,
const struct in6_addr *saddr, __be16 sport,
const struct in6_addr *daddr, __be16 dport,
- int dif, int sdif, struct udp_table *udptable,
- struct sk_buff *skb)
+ int dif, int sdif, struct sk_buff *skb)
{
+ struct udp_table *udptable = net->ipv4.udp_table;
unsigned short hnum = ntohs(dport);
struct udp_hslot *hslot2;
struct sock *result, *sk;
@@ -406,14 +406,13 @@ struct sock *__udp6_lib_lookup(const struct net *net,
EXPORT_SYMBOL_GPL(__udp6_lib_lookup);
static struct sock *__udp6_lib_lookup_skb(struct sk_buff *skb,
- __be16 sport, __be16 dport,
- struct udp_table *udptable)
+ __be16 sport, __be16 dport)
{
const struct ipv6hdr *iph = ipv6_hdr(skb);
return __udp6_lib_lookup(dev_net(skb->dev), &iph->saddr, sport,
&iph->daddr, dport, inet6_iif(skb),
- inet6_sdif(skb), udptable, skb);
+ inet6_sdif(skb), skb);
}
struct sock *udp6_lib_lookup_skb(const struct sk_buff *skb,
@@ -421,14 +420,12 @@ struct sock *udp6_lib_lookup_skb(const struct sk_buff *skb,
{
const u16 offset = NAPI_GRO_CB(skb)->network_offsets[skb->encapsulation];
const struct ipv6hdr *iph = (struct ipv6hdr *)(skb->data + offset);
- struct net *net = dev_net(skb->dev);
int iif, sdif;
inet6_get_iif_sdif(skb, &iif, &sdif);
- return __udp6_lib_lookup(net, &iph->saddr, sport,
- &iph->daddr, dport, iif,
- sdif, net->ipv4.udp_table, NULL);
+ return __udp6_lib_lookup(dev_net(skb->dev), &iph->saddr, sport,
+ &iph->daddr, dport, iif, sdif, NULL);
}
/* Must be called under rcu_read_lock().
@@ -440,8 +437,7 @@ struct sock *udp6_lib_lookup(const struct net *net, const struct in6_addr *saddr
{
struct sock *sk;
- sk = __udp6_lib_lookup(net, saddr, sport, daddr, dport,
- dif, 0, net->ipv4.udp_table, NULL);
+ sk = __udp6_lib_lookup(net, saddr, sport, daddr, dport, dif, 0, NULL);
if (sk && !refcount_inc_not_zero(&sk->sk_refcnt))
sk = NULL;
return sk;
@@ -642,7 +638,6 @@ static int __udp6_lib_err_encap_no_sk(struct sk_buff *skb,
static struct sock *__udp6_lib_err_encap(struct net *net,
const struct ipv6hdr *hdr, int offset,
struct udphdr *uh,
- struct udp_table *udptable,
struct sock *sk,
struct sk_buff *skb,
struct inet6_skb_parm *opt,
@@ -673,7 +668,7 @@ static struct sock *__udp6_lib_err_encap(struct net *net,
sk = __udp6_lib_lookup(net, &hdr->daddr, uh->source,
&hdr->saddr, uh->dest,
- inet6_iif(skb), 0, udptable, skb);
+ inet6_iif(skb), 0, skb);
if (sk) {
up = udp_sk(sk);
@@ -694,29 +689,28 @@ static struct sock *__udp6_lib_err_encap(struct net *net,
return sk;
}
-static int __udp6_lib_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
- u8 type, u8 code, int offset, __be32 info,
- struct udp_table *udptable)
+static int udpv6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
+ u8 type, u8 code, int offset, __be32 info)
{
- struct ipv6_pinfo *np;
const struct ipv6hdr *hdr = (const struct ipv6hdr *)skb->data;
- const struct in6_addr *saddr = &hdr->saddr;
- const struct in6_addr *daddr = seg6_get_daddr(skb, opt) ? : &hdr->daddr;
- struct udphdr *uh = (struct udphdr *)(skb->data+offset);
+ struct udphdr *uh = (struct udphdr *)(skb->data + offset);
+ const struct in6_addr *saddr, *daddr;
+ struct net *net = dev_net(skb->dev);
+ struct ipv6_pinfo *np;
bool tunnel = false;
struct sock *sk;
int harderr;
int err;
- struct net *net = dev_net(skb->dev);
+ daddr = seg6_get_daddr(skb, opt) ? : &hdr->daddr;
+ saddr = &hdr->saddr;
sk = __udp6_lib_lookup(net, daddr, uh->dest, saddr, uh->source,
- inet6_iif(skb), inet6_sdif(skb), udptable, NULL);
+ inet6_iif(skb), inet6_sdif(skb), NULL);
if (!sk || READ_ONCE(udp_sk(sk)->encap_type)) {
/* No socket for error: try tunnels before discarding */
if (static_branch_unlikely(&udpv6_encap_needed_key)) {
- sk = __udp6_lib_err_encap(net, hdr, offset, uh,
- udptable, sk, skb,
+ sk = __udp6_lib_err_encap(net, hdr, offset, uh, sk, skb,
opt, type, code, info);
if (!sk)
return 0;
@@ -808,14 +802,6 @@ static int __udpv6_queue_rcv_skb(struct sock *sk, struct sk_buff *skb)
return 0;
}
-static __inline__ int udpv6_err(struct sk_buff *skb,
- struct inet6_skb_parm *opt, u8 type,
- u8 code, int offset, __be32 info)
-{
- return __udp6_lib_err(skb, opt, type, code, offset, info,
- dev_net(skb->dev)->ipv4.udp_table);
-}
-
static int udpv6_queue_rcv_one_skb(struct sock *sk, struct sk_buff *skb)
{
enum skb_drop_reason drop_reason = SKB_DROP_REASON_NOT_SPECIFIED;
@@ -947,19 +933,27 @@ static void udp6_csum_zero_error(struct sk_buff *skb)
* so we don't need to lock the hashes.
*/
static int __udp6_lib_mcast_deliver(struct net *net, struct sk_buff *skb,
- const struct in6_addr *saddr, const struct in6_addr *daddr,
- struct udp_table *udptable, int proto)
+ const struct in6_addr *saddr,
+ const struct in6_addr *daddr,
+ int proto)
{
- struct sock *sk, *first = NULL;
+ struct udp_table *udptable = net->ipv4.udp_table;
const struct udphdr *uh = udp_hdr(skb);
+ unsigned int hash2, hash2_any, offset;
unsigned short hnum = ntohs(uh->dest);
- struct udp_hslot *hslot = udp_hashslot(udptable, net, hnum);
- unsigned int offset = offsetof(typeof(*sk), sk_node);
- unsigned int hash2 = 0, hash2_any = 0, use_hash2 = (hslot->count > 10);
- int dif = inet6_iif(skb);
+ struct sock *sk, *first = NULL;
int sdif = inet6_sdif(skb);
+ int dif = inet6_iif(skb);
struct hlist_node *node;
+ struct udp_hslot *hslot;
struct sk_buff *nskb;
+ bool use_hash2;
+
+ hash2_any = 0;
+ hash2 = 0;
+ hslot = udp_hashslot(udptable, net, hnum);
+ use_hash2 = hslot->count > 10;
+ offset = offsetof(typeof(*sk), sk_node);
if (use_hash2) {
hash2_any = ipv6_portaddr_hash(net, &in6addr_any, hnum) &
@@ -1069,8 +1063,7 @@ static int udp6_csum_init(struct sk_buff *skb, struct udphdr *uh)
return 0;
}
-static int __udp6_lib_rcv(struct sk_buff *skb, struct udp_table *udptable,
- int proto)
+static int __udp6_lib_rcv(struct sk_buff *skb, int proto)
{
enum skb_drop_reason reason = SKB_DROP_REASON_NOT_SPECIFIED;
const struct in6_addr *saddr, *daddr;
@@ -1139,11 +1132,10 @@ static int __udp6_lib_rcv(struct sk_buff *skb, struct udp_table *udptable,
* Multicast receive code
*/
if (ipv6_addr_is_multicast(daddr))
- return __udp6_lib_mcast_deliver(net, skb,
- saddr, daddr, udptable, proto);
+ return __udp6_lib_mcast_deliver(net, skb, saddr, daddr, proto);
/* Unicast */
- sk = __udp6_lib_lookup_skb(skb, uh->source, uh->dest, udptable);
+ sk = __udp6_lib_lookup_skb(skb, uh->source, uh->dest);
if (sk) {
if (!uh->check && !udp_get_no_check6_rx(sk))
goto report_csum_error;
@@ -1261,7 +1253,7 @@ void udp_v6_early_demux(struct sk_buff *skb)
INDIRECT_CALLABLE_SCOPE int udpv6_rcv(struct sk_buff *skb)
{
- return __udp6_lib_rcv(skb, dev_net(skb->dev)->ipv4.udp_table, IPPROTO_UDP);
+ return __udp6_lib_rcv(skb, IPPROTO_UDP);
}
/*
diff --git a/net/ipv6/udp_offload.c b/net/ipv6/udp_offload.c
index e003b8494dc0..778afc7453ce 100644
--- a/net/ipv6/udp_offload.c
+++ b/net/ipv6/udp_offload.c
@@ -128,8 +128,7 @@ static struct sock *udp6_gro_lookup_skb(struct sk_buff *skb, __be16 sport,
inet6_get_iif_sdif(skb, &iif, &sdif);
return __udp6_lib_lookup(net, &iph->saddr, sport,
- &iph->daddr, dport, iif,
- sdif, net->ipv4.udp_table, NULL);
+ &iph->daddr, dport, iif, sdif, NULL);
}
struct sk_buff *udp6_gro_receive(struct list_head *head, struct sk_buff *skb)
--
2.53.0.473.g4a7958ca14-goog
next prev parent reply other threads:[~2026-03-11 5:20 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-11 5:19 [PATCH v3 net-next 00/15] udp: Retire UDP-Lite Kuniyuki Iwashima
2026-03-11 5:19 ` [PATCH v3 net-next 01/15] udp: Make udp[46]_seq_show() static Kuniyuki Iwashima
2026-03-11 5:19 ` [PATCH v3 net-next 02/15] ipv6: Retire UDP-Lite Kuniyuki Iwashima
2026-03-11 5:19 ` [PATCH v3 net-next 03/15] ipv6: Remove UDP-Lite support for IPV6_ADDRFORM Kuniyuki Iwashima
2026-03-11 5:19 ` [PATCH v3 net-next 04/15] ipv4: Retire UDP-Lite Kuniyuki Iwashima
2026-03-11 5:19 ` [PATCH v3 net-next 05/15] udp: Remove UDP-Lite SNMP stats Kuniyuki Iwashima
2026-03-11 5:19 ` [PATCH v3 net-next 06/15] smack: Remove IPPROTO_UDPLITE support in security_sock_rcv_skb() Kuniyuki Iwashima
2026-03-11 5:19 ` [PATCH v3 net-next 07/15] udp: Remove partial csum code in RX Kuniyuki Iwashima
2026-03-13 1:04 ` Jakub Kicinski
2026-03-13 2:20 ` Willem de Bruijn
2026-03-11 5:19 ` [PATCH v3 net-next 08/15] udp: Remove partial csum code in TX Kuniyuki Iwashima
2026-03-11 5:19 ` [PATCH v3 net-next 09/15] udp: Remove UDPLITE_SEND_CSCOV and UDPLITE_RECV_CSCOV Kuniyuki Iwashima
2026-03-11 5:19 ` [PATCH v3 net-next 10/15] udp: Remove struct proto.h.udp_table Kuniyuki Iwashima
2026-03-11 5:19 ` [PATCH v3 net-next 11/15] udp: Remove udp_table in struct udp_seq_afinfo Kuniyuki Iwashima
2026-03-11 5:19 ` [PATCH v3 net-next 12/15] udp: Remove dead check in __udp[46]_lib_lookup() for BPF Kuniyuki Iwashima
2026-03-11 5:20 ` Kuniyuki Iwashima [this message]
2026-03-11 5:20 ` [PATCH v3 net-next 14/15] udp: Don't pass udptable to IPv4 socket lookup functions Kuniyuki Iwashima
2026-03-11 5:20 ` [PATCH v3 net-next 15/15] udp: Don't pass proto to __udp4_lib_rcv() and __udp6_lib_rcv() Kuniyuki Iwashima
2026-03-14 2:20 ` [PATCH v3 net-next 00/15] udp: Retire UDP-Lite patchwork-bot+netdevbpf
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