From: Yafang Shao <laoar.shao@gmail.com>
To: edumazet@google.com, davem@davemloft.net
Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
Yafang Shao <laoar.shao@gmail.com>
Subject: [PATCH net-next] tcp: show number of network segments in some SNMP counters
Date: Sun, 9 Sep 2018 00:58:18 +0800 [thread overview]
Message-ID: <1536425898-12059-1-git-send-email-laoar.shao@gmail.com> (raw)
It is better to show the number of network segments in bellow SNMP
counters, because that could be more useful for the user.
For example, the user could easily figure out how mant packets are
dropped and how many packets are queued in the out-of-oder queue.
- LINUX_MIB_TCPRCVQDROP
- LINUX_MIB_TCPZEROWINDOWDROP
- LINUX_MIB_TCPBACKLOGDROP
- LINUX_MIB_TCPMINTTLDROP
- LINUX_MIB_TCPOFODROP
- LINUX_MIB_TCPOFOQUEUE
Signed-off-by: Yafang Shao <laoar.shao@gmail.com>
---
net/ipv4/tcp_input.c | 18 ++++++++++++------
net/ipv4/tcp_ipv4.c | 9 ++++++---
net/ipv6/tcp_ipv6.c | 6 ++++--
3 files changed, 22 insertions(+), 11 deletions(-)
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index 62508a2..90f449b 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -4496,7 +4496,8 @@ static void tcp_data_queue_ofo(struct sock *sk, struct sk_buff *skb)
tcp_ecn_check_ce(sk, skb);
if (unlikely(tcp_try_rmem_schedule(sk, skb, skb->truesize))) {
- NET_INC_STATS(sock_net(sk), LINUX_MIB_TCPOFODROP);
+ NET_ADD_STATS(sock_net(sk), LINUX_MIB_TCPOFODROP,
+ tcp_skb_pcount(skb));
tcp_drop(sk, skb);
return;
}
@@ -4505,7 +4506,8 @@ static void tcp_data_queue_ofo(struct sock *sk, struct sk_buff *skb)
tp->pred_flags = 0;
inet_csk_schedule_ack(sk);
- NET_INC_STATS(sock_net(sk), LINUX_MIB_TCPOFOQUEUE);
+ NET_ADD_STATS(sock_net(sk), LINUX_MIB_TCPOFOQUEUE,
+ tcp_skb_pcount(skb));
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",
@@ -4666,7 +4668,8 @@ int tcp_send_rcvq(struct sock *sk, struct msghdr *msg, size_t size)
skb->len = size;
if (tcp_try_rmem_schedule(sk, skb, skb->truesize)) {
- NET_INC_STATS(sock_net(sk), LINUX_MIB_TCPRCVQDROP);
+ NET_ADD_STATS(sock_net(sk), LINUX_MIB_TCPRCVQDROP,
+ tcp_skb_pcount(skb));
goto err_free;
}
@@ -4725,7 +4728,8 @@ static void tcp_data_queue(struct sock *sk, struct sk_buff *skb)
*/
if (TCP_SKB_CB(skb)->seq == tp->rcv_nxt) {
if (tcp_receive_window(tp) == 0) {
- NET_INC_STATS(sock_net(sk), LINUX_MIB_TCPZEROWINDOWDROP);
+ NET_ADD_STATS(sock_net(sk), LINUX_MIB_TCPZEROWINDOWDROP,
+ tcp_skb_pcount(skb));
goto out_of_window;
}
@@ -4734,7 +4738,8 @@ static void tcp_data_queue(struct sock *sk, struct sk_buff *skb)
if (skb_queue_len(&sk->sk_receive_queue) == 0)
sk_forced_mem_schedule(sk, skb->truesize);
else if (tcp_try_rmem_schedule(sk, skb, skb->truesize)) {
- NET_INC_STATS(sock_net(sk), LINUX_MIB_TCPRCVQDROP);
+ NET_ADD_STATS(sock_net(sk), LINUX_MIB_TCPRCVQDROP,
+ tcp_skb_pcount(skb));
goto drop;
}
@@ -4796,7 +4801,8 @@ static void tcp_data_queue(struct sock *sk, struct sk_buff *skb)
* remembering D-SACK for its head made in previous line.
*/
if (!tcp_receive_window(tp)) {
- NET_INC_STATS(sock_net(sk), LINUX_MIB_TCPZEROWINDOWDROP);
+ NET_ADD_STATS(sock_net(sk), LINUX_MIB_TCPZEROWINDOWDROP,
+ tcp_skb_pcount(skb));
goto out_of_window;
}
goto queue_and_out;
diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index 09547ef..f2fe14b 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -475,7 +475,8 @@ void tcp_v4_err(struct sk_buff *icmp_skb, u32 info)
goto out;
if (unlikely(iph->ttl < inet_sk(sk)->min_ttl)) {
- __NET_INC_STATS(net, LINUX_MIB_TCPMINTTLDROP);
+ __NET_ADD_STATS(net, LINUX_MIB_TCPMINTTLDROP,
+ tcp_skb_pcount(skb));
goto out;
}
@@ -1633,7 +1634,8 @@ bool tcp_add_backlog(struct sock *sk, struct sk_buff *skb)
if (unlikely(sk_add_backlog(sk, skb, limit))) {
bh_unlock_sock(sk);
- __NET_INC_STATS(sock_net(sk), LINUX_MIB_TCPBACKLOGDROP);
+ __NET_ADD_STATS(sock_net(sk), LINUX_MIB_TCPBACKLOGDROP,
+ tcp_skb_pcount(skb));
return true;
}
return false;
@@ -1790,7 +1792,8 @@ int tcp_v4_rcv(struct sk_buff *skb)
}
}
if (unlikely(iph->ttl < inet_sk(sk)->min_ttl)) {
- __NET_INC_STATS(net, LINUX_MIB_TCPMINTTLDROP);
+ __NET_ADD_STATS(net, LINUX_MIB_TCPMINTTLDROP,
+ tcp_skb_pcount(skb));
goto discard_and_relse;
}
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index 03e6b7a..97dfc16 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -391,7 +391,8 @@ static void tcp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
goto out;
if (ipv6_hdr(skb)->hop_limit < inet6_sk(sk)->min_hopcount) {
- __NET_INC_STATS(net, LINUX_MIB_TCPMINTTLDROP);
+ __NET_ADD_STATS(net, LINUX_MIB_TCPMINTTLDROP,
+ tcp_skb_pcount(skb));
goto out;
}
@@ -1523,7 +1524,8 @@ static int tcp_v6_rcv(struct sk_buff *skb)
}
}
if (hdr->hop_limit < inet6_sk(sk)->min_hopcount) {
- __NET_INC_STATS(net, LINUX_MIB_TCPMINTTLDROP);
+ __NET_ADD_STATS(net, LINUX_MIB_TCPMINTTLDROP,
+ tcp_skb_pcount(skb));
goto discard_and_relse;
}
--
1.8.3.1
next reply other threads:[~2018-09-08 16:58 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-08 16:58 Yafang Shao [this message]
2018-09-08 17:42 ` [PATCH net-next] tcp: show number of network segments in some SNMP counters Yafang Shao
2018-09-10 15:07 ` kbuild test robot
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1536425898-12059-1-git-send-email-laoar.shao@gmail.com \
--to=laoar.shao@gmail.com \
--cc=davem@davemloft.net \
--cc=edumazet@google.com \
--cc=linux-kernel@vger.kernel.org \
--cc=netdev@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).