[PATCH net-next 3/3] gro: inline tcp6_gro_complete()
From: Eric Dumazet <edumazet@google.com>
Date: 2026-01-16 15:30:05
Subsystem:
networking [general], networking [ipv4/ipv6], networking [tcp], the rest · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, David Ahern, Ido Schimmel, Neal Cardwell, Linus Torvalds
Remove one function call from GRO stack for native IPv6 + TCP packets. $ scripts/bloat-o-meter -t vmlinux.2 vmlinux.3 add/remove: 0/0 grow/shrink: 1/1 up/down: 298/-5 (293) Function old new delta ipv6_gro_complete 435 733 +298 tcp6_gro_complete 311 306 -5 Total: Before=22593532, After=22593825, chg +0.00% Signed-off-by: Eric Dumazet <edumazet@google.com> --- include/net/tcp.h | 1 - net/ipv6/ip6_offload.c | 21 +++++++++------------ net/ipv6/tcpv6_offload.c | 2 +- 3 files changed, 10 insertions(+), 14 deletions(-)
diff --git a/include/net/tcp.h b/include/net/tcp.h
index 2a7744de226ed0a378719fd60fa2a3830bef2e7e..68bc08c40d5435ce196dd492b46b5d81f8e29b3f 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h@@ -2327,7 +2327,6 @@ struct sk_buff *tcp_gro_receive(struct list_head *head, struct sk_buff *skb, struct tcphdr *th); INDIRECT_CALLABLE_DECLARE(int tcp4_gro_complete(struct sk_buff *skb, int thoff)); INDIRECT_CALLABLE_DECLARE(struct sk_buff *tcp4_gro_receive(struct list_head *head, struct sk_buff *skb)); -INDIRECT_CALLABLE_DECLARE(int tcp6_gro_complete(struct sk_buff *skb, int thoff)); #ifdef CONFIG_INET void tcp_gro_complete(struct sk_buff *skb); #else
diff --git a/net/ipv6/ip6_offload.c b/net/ipv6/ip6_offload.c
index 4d96154c0dcd019322908ab6ddaa663a2a565e44..32a104ead8760d33e152e0b0a6a6896d70d155b5 100644
--- a/net/ipv6/ip6_offload.c
+++ b/net/ipv6/ip6_offload.c@@ -21,16 +21,6 @@ #include "ip6_offload.h" #include "tcpv6_offload.c" -/* All GRO functions are always builtin, except UDP over ipv6, which lays in - * ipv6 module, as it depends on UDPv6 lookup function, so we need special care - * when ipv6 is built as a module - */ -#if IS_BUILTIN(CONFIG_IPV6) -#define INDIRECT_CALL_L4(f, f2, f1, ...) INDIRECT_CALL_2(f, f2, f1, __VA_ARGS__) -#else -#define INDIRECT_CALL_L4(f, f2, f1, ...) INDIRECT_CALL_1(f, f2, __VA_ARGS__) -#endif - static int ipv6_gro_pull_exthdrs(struct sk_buff *skb, int off, int proto) { const struct net_offload *ops = NULL;
@@ -383,11 +373,18 @@ INDIRECT_CALLABLE_SCOPE int ipv6_gro_complete(struct sk_buff *skb, int nhoff) } nhoff += sizeof(*iph) + ipv6_exthdrs_len(iph, &ops); + + if (likely(ops == &net_hotdata.tcpv6_offload)) + return tcp6_gro_complete(skb, nhoff); +#if IS_BUILTIN(CONFIG_IPV6) + if (ops == &net_hotdata.udpv6_offload) + return udp6_gro_complete(skb, nhoff); +#endif + if (WARN_ON(!ops || !ops->callbacks.gro_complete)) goto out; - err = INDIRECT_CALL_L4(ops->callbacks.gro_complete, tcp6_gro_complete, - udp6_gro_complete, skb, nhoff); + err = ops->callbacks.gro_complete(skb, nhoff); out: return err;
diff --git a/net/ipv6/tcpv6_offload.c b/net/ipv6/tcpv6_offload.c
index 7f19ce423058870f285b7f8ae2a4d116d783f9fb..46fa2069d321663ed232e2836db77e3fcb1f4f07 100644
--- a/net/ipv6/tcpv6_offload.c
+++ b/net/ipv6/tcpv6_offload.c@@ -67,7 +67,7 @@ static __always_inline struct sk_buff *tcp6_gro_receive(struct list_head *head, return NULL; } -INDIRECT_CALLABLE_SCOPE int tcp6_gro_complete(struct sk_buff *skb, int thoff) +static __always_inline int tcp6_gro_complete(struct sk_buff *skb, int thoff) { const u16 offset = NAPI_GRO_CB(skb)->network_offsets[skb->encapsulation]; const struct ipv6hdr *iph = (struct ipv6hdr *)(skb->data + offset);
--
2.52.0.457.g6b5491de43-goog