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tcp: inline tcp_filter()

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This helper is already (auto)inlined from IPv4 TCP stack.

Make it an inline function to benefit IPv6 as well.

$ scripts/bloat-o-meter -t vmlinux.old vmlinux.new
add/remove: 0/2 grow/shrink: 1/0 up/down: 30/-49 (-19)
Function                                     old     new   delta
tcp_v6_rcv                                  3448    3478     +30
__pfx_tcp_filter                              16       -     -16
tcp_filter                                    33       -     -33
Total: Before=24891904, After=24891885, chg -0.00%

Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Kuniyuki Iwashima <kuniyu@google.com>
Link: https://patch.msgid.link/20260205164329.3401481-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Eric Dumazet authored and Jakub Kicinski committed 2026-02-06 20:12:11 -08:00
1 parent fd24173439
commit a35b6e4863
2 files changed
+7 -9
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include/net/tcp.h
+7 -1
View File
@@ -1633,8 +1633,14 @@ static inline bool tcp_checksum_complete(struct sk_buff *skb)
bool tcp_add_backlog(struct sock *sk, struct sk_buff *skb,
enum skb_drop_reason *reason);
static inline int tcp_filter(struct sock *sk, struct sk_buff *skb,
enum skb_drop_reason *reason)
{
const struct tcphdr *th = (const struct tcphdr *)skb->data;
return sk_filter_trim_cap(sk, skb, __tcp_hdrlen(th), reason);
}
int tcp_filter(struct sock *sk, struct sk_buff *skb, enum skb_drop_reason *reason);
void tcp_set_state(struct sock *sk, int state);
void tcp_done(struct sock *sk);
int tcp_abort(struct sock *sk, int err);
net/ipv4/tcp_ipv4.c
-8
View File
@@ -2109,14 +2109,6 @@ no_coalesce:
}
EXPORT_IPV6_MOD(tcp_add_backlog);
int tcp_filter(struct sock *sk, struct sk_buff *skb, enum skb_drop_reason *reason)
{
struct tcphdr *th = (struct tcphdr *)skb->data;
return sk_filter_trim_cap(sk, skb, th->doff * 4, reason);
}
EXPORT_IPV6_MOD(tcp_filter);
static void tcp_v4_restore_cb(struct sk_buff *skb)
{
memmove(IPCB(skb), &TCP_SKB_CB(skb)->header.h4,