From: Yafang Shao <laoar.shao@gmail.com>
To: davem@davemloft.net
Cc: daniel@iogearbox.net, edumazet@google.com,
netdev@vger.kernel.org, shaoyafang@didiglobal.com,
Yafang Shao <laoar.shao@gmail.com>
Subject: [net-next 1/5] tcp: clean up SOCK_DEBUG()
Date: Fri, 15 Feb 2019 22:49:43 +0800 [thread overview]
Message-ID: <1550242187-29660-2-git-send-email-laoar.shao@gmail.com> (raw)
In-Reply-To: <1550242187-29660-1-git-send-email-laoar.shao@gmail.com>
Per discussion with Daniel[1] and Eric[2], the SOCK_DEBUG() is a very
ancient interface, which is not very useful for debugging.
So we'd better clean up it.
This patch cleans up it for TCP.
[1] https://patchwork.ozlabs.org/patch/1035573/
[2] https://patchwork.ozlabs.org/patch/1040533/
Signed-off-by: Yafang Shao <laoar.shao@gmail.com>
---
net/ipv4/tcp_input.c | 19 +------------------
net/ipv6/tcp_ipv6.c | 2 --
2 files changed, 1 insertion(+), 20 deletions(-)
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index 7a027dec..6d2750e 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -3595,7 +3595,7 @@ static int tcp_ack(struct sock *sk, const struct sk_buff *skb, int flag)
* this segment (RFC793 Section 3.9).
*/
if (after(ack, tp->snd_nxt))
- goto invalid_ack;
+ return -1;
if (after(ack, prior_snd_una)) {
flag |= FLAG_SND_UNA_ADVANCED;
@@ -3714,10 +3714,6 @@ static int tcp_ack(struct sock *sk, const struct sk_buff *skb, int flag)
tcp_process_tlp_ack(sk, ack, flag);
return 1;
-invalid_ack:
- SOCK_DEBUG(sk, "Ack %u after %u:%u\n", ack, tp->snd_una, tp->snd_nxt);
- return -1;
-
old_ack:
/* If data was SACKed, tag it and see if we should send more data.
* If data was DSACKed, see if we can undo a cwnd reduction.
@@ -3731,7 +3727,6 @@ static int tcp_ack(struct sock *sk, const struct sk_buff *skb, int flag)
tcp_xmit_recovery(sk, rexmit);
}
- SOCK_DEBUG(sk, "Ack %u before %u:%u\n", ack, tp->snd_una, tp->snd_nxt);
return 0;
}
@@ -4432,13 +4427,9 @@ static void tcp_ofo_queue(struct sock *sk)
rb_erase(&skb->rbnode, &tp->out_of_order_queue);
if (unlikely(!after(TCP_SKB_CB(skb)->end_seq, tp->rcv_nxt))) {
- SOCK_DEBUG(sk, "ofo packet was already received\n");
tcp_drop(sk, skb);
continue;
}
- SOCK_DEBUG(sk, "ofo requeuing : rcv_next %X seq %X - %X\n",
- tp->rcv_nxt, TCP_SKB_CB(skb)->seq,
- TCP_SKB_CB(skb)->end_seq);
tail = skb_peek_tail(&sk->sk_receive_queue);
eaten = tail && tcp_try_coalesce(sk, tail, skb, &fragstolen);
@@ -4502,8 +4493,6 @@ static void tcp_data_queue_ofo(struct sock *sk, struct sk_buff *skb)
NET_INC_STATS(sock_net(sk), LINUX_MIB_TCPOFOQUEUE);
seq = TCP_SKB_CB(skb)->seq;
end_seq = TCP_SKB_CB(skb)->end_seq;
- SOCK_DEBUG(sk, "out of order segment: rcv_next %X seq %X - %X\n",
- tp->rcv_nxt, seq, end_seq);
p = &tp->out_of_order_queue.rb_node;
if (RB_EMPTY_ROOT(&tp->out_of_order_queue)) {
@@ -4779,10 +4768,6 @@ static void tcp_data_queue(struct sock *sk, struct sk_buff *skb)
if (before(TCP_SKB_CB(skb)->seq, tp->rcv_nxt)) {
/* Partial packet, seq < rcv_next < end_seq */
- SOCK_DEBUG(sk, "partial packet: rcv_next %X seq %X - %X\n",
- tp->rcv_nxt, TCP_SKB_CB(skb)->seq,
- TCP_SKB_CB(skb)->end_seq);
-
tcp_dsack_set(sk, TCP_SKB_CB(skb)->seq, tp->rcv_nxt);
/* If window is closed, drop tail of packet. But after
@@ -5061,8 +5046,6 @@ static int tcp_prune_queue(struct sock *sk)
{
struct tcp_sock *tp = tcp_sk(sk);
- SOCK_DEBUG(sk, "prune_queue: c=%x\n", tp->copied_seq);
-
NET_INC_STATS(sock_net(sk), LINUX_MIB_PRUNECALLED);
if (atomic_read(&sk->sk_rmem_alloc) >= sk->sk_rcvbuf)
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index e51cda7..57ef69a1 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -220,8 +220,6 @@ static int tcp_v6_connect(struct sock *sk, struct sockaddr *uaddr,
u32 exthdrlen = icsk->icsk_ext_hdr_len;
struct sockaddr_in sin;
- SOCK_DEBUG(sk, "connect: ipv4 mapped\n");
-
if (__ipv6_only_sock(sk))
return -ENETUNREACH;
--
1.8.3.1
next prev parent reply other threads:[~2019-02-15 14:50 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-15 14:49 [net-next 0/5] clean up SOCK_DEBUG() Yafang Shao
2019-02-15 14:49 ` Yafang Shao [this message]
2019-02-15 14:49 ` [net-next 2/5] x25: " Yafang Shao
2019-02-15 14:49 ` [net-next 3/5] appletalk: " Yafang Shao
2019-02-15 14:49 ` [net-next 4/5] dccp: " Yafang Shao
2019-02-15 14:49 ` [net-next 5/5] net: sock: remove the definition of SOCK_DEBUG() Yafang Shao
2019-02-15 14:58 ` Eric Dumazet
2019-02-15 15:41 ` Yafang Shao
2019-02-15 15:54 ` Eric Dumazet
2019-02-15 18:12 ` Cong Wang
2019-02-15 18:22 ` Eric Dumazet
2019-02-15 18:51 ` Joe Perches
2019-02-16 2:50 ` Yafang Shao
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