netdev - [PATCH bpf-next v3 2/3] tcp: expose tcp_sock_set_keepidle

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Message-Id: <20200602092648.50440-2-zeil@yandex-team.ru>
Date:   Tue,  2 Jun 2020 12:26:47 +0300
From:   Dmitry Yakunin <zeil@...dex-team.ru>
To:     alexei.starovoitov@...il.com
Cc:     davem@...emloft.net, brakmo@...com, eric.dumazet@...il.com,
        kafai@...com, bpf@...r.kernel.org, netdev@...r.kernel.org
Subject: [PATCH bpf-next v3 2/3] tcp: expose tcp_sock_set_keepidle_locked

This is preparation for usage in bpf_setsockopt.

Signed-off-by: Dmitry Yakunin <zeil@...dex-team.ru>
---
 include/linux/tcp.h | 1 +
 net/ipv4/tcp.c      | 7 ++++---
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/include/linux/tcp.h b/include/linux/tcp.h
index 9aac824..3bdec31 100644
--- a/include/linux/tcp.h
+++ b/include/linux/tcp.h
@@ -499,6 +499,7 @@ int tcp_skb_shift(struct sk_buff *to, struct sk_buff *from, int pcount,
 
 void tcp_sock_set_cork(struct sock *sk, bool on);
 int tcp_sock_set_keepcnt(struct sock *sk, int val);
+int tcp_sock_set_keepidle_locked(struct sock *sk, int val);
 int tcp_sock_set_keepidle(struct sock *sk, int val);
 int tcp_sock_set_keepintvl(struct sock *sk, int val);
 void tcp_sock_set_nodelay(struct sock *sk);
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 15d47d5..0e29760 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -2901,7 +2901,7 @@ void tcp_sock_set_user_timeout(struct sock *sk, u32 val)
 }
 EXPORT_SYMBOL(tcp_sock_set_user_timeout);
 
-static int __tcp_sock_set_keepidle(struct sock *sk, int val)
+int tcp_sock_set_keepidle_locked(struct sock *sk, int val)
 {
 	struct tcp_sock *tp = tcp_sk(sk);
 
@@ -2922,13 +2922,14 @@ static int __tcp_sock_set_keepidle(struct sock *sk, int val)
 
 	return 0;
 }
+EXPORT_SYMBOL(tcp_sock_set_keepidle_locked);
 
 int tcp_sock_set_keepidle(struct sock *sk, int val)
 {
 	int err;
 
 	lock_sock(sk);
-	err = __tcp_sock_set_keepidle(sk, val);
+	err = tcp_sock_set_keepidle_locked(sk, val);
 	release_sock(sk);
 	return err;
 }
@@ -3127,7 +3128,7 @@ static int do_tcp_setsockopt(struct sock *sk, int level,
 		break;
 
 	case TCP_KEEPIDLE:
-		err = __tcp_sock_set_keepidle(sk, val);
+		err = tcp_sock_set_keepidle_locked(sk, val);
 		break;
 	case TCP_KEEPINTVL:
 		if (val < 1 || val > MAX_TCP_KEEPINTVL)
-- 
2.7.4