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Message-Id: <200709111831.LAA06892@tardy.cup.hp.com>
Date: Tue, 11 Sep 2007 11:31:00 -0700 (PDT)
From: Rick Jones <rick.jones2@...com>
To: netdev@...r.kernel.org
Subject: [PATCH] include listenq max/backlog in tcp_info and related reports
Return some useful information such as the maximum listen backlog and
the current listen backlog in the tcp_info structure and have that
match what one can see in /proc/net/tcp and /proc/net/tcp6.
Signed-off-by: Rick Jones <rick.jones2@...com>
---
diff -r bdcdd0e1ee9d Documentation/networking/proc_net_tcp.txt
--- a/Documentation/networking/proc_net_tcp.txt Sat Sep 01 07:00:31 2007 +0000
+++ b/Documentation/networking/proc_net_tcp.txt Mon Sep 10 16:09:46 2007 -0700
@@ -20,8 +20,8 @@ up into 3 parts because of the length of
| | | | |--> number of unrecovered RTO timeouts
| | | |----------> number of jiffies until timer expires
| | |----------------> timer_active (see below)
- | |----------------------> receive-queue
- |-------------------------------> transmit-queue
+ | |----------------------> receive-queue or connection backlog
+ |-------------------------------> transmit-queue or connection limit
1000 0 54165785 4 cd1e6040 25 4 27 3 -1
| | | | | | | | | |--> slow start size threshold,
diff -r bdcdd0e1ee9d net/ipv4/tcp.c
--- a/net/ipv4/tcp.c Sat Sep 01 07:00:31 2007 +0000
+++ b/net/ipv4/tcp.c Mon Sep 10 16:09:46 2007 -0700
@@ -2030,8 +2030,14 @@ void tcp_get_info(struct sock *sk, struc
info->tcpi_snd_mss = tp->mss_cache;
info->tcpi_rcv_mss = icsk->icsk_ack.rcv_mss;
- info->tcpi_unacked = tp->packets_out;
- info->tcpi_sacked = tp->sacked_out;
+ if (sk->sk_state == TCP_LISTEN) {
+ info->tcpi_unacked = sk->sk_ack_backlog;
+ info->tcpi_sacked = sk->sk_max_ack_backlog;
+ }
+ else {
+ info->tcpi_unacked = tp->packets_out;
+ info->tcpi_sacked = tp->sacked_out;
+ }
info->tcpi_lost = tp->lost_out;
info->tcpi_retrans = tp->retrans_out;
info->tcpi_fackets = tp->fackets_out;
diff -r bdcdd0e1ee9d net/ipv4/tcp_ipv4.c
--- a/net/ipv4/tcp_ipv4.c Sat Sep 01 07:00:31 2007 +0000
+++ b/net/ipv4/tcp_ipv4.c Mon Sep 10 16:09:46 2007 -0700
@@ -2320,7 +2320,8 @@ static void get_tcp4_sock(struct sock *s
sprintf(tmpbuf, "%4d: %08X:%04X %08X:%04X %02X %08X:%08X %02X:%08lX "
"%08X %5d %8d %lu %d %p %u %u %u %u %d",
i, src, srcp, dest, destp, sk->sk_state,
- tp->write_seq - tp->snd_una,
+ sk->sk_state == TCP_LISTEN ? sk->sk_max_ack_backlog :
+ (tp->write_seq - tp->snd_una),
sk->sk_state == TCP_LISTEN ? sk->sk_ack_backlog :
(tp->rcv_nxt - tp->copied_seq),
timer_active,
diff -r bdcdd0e1ee9d net/ipv6/tcp_ipv6.c
--- a/net/ipv6/tcp_ipv6.c Sat Sep 01 07:00:31 2007 +0000
+++ b/net/ipv6/tcp_ipv6.c Mon Sep 10 16:09:46 2007 -0700
@@ -2005,8 +2005,10 @@ static void get_tcp6_sock(struct seq_fil
dest->s6_addr32[0], dest->s6_addr32[1],
dest->s6_addr32[2], dest->s6_addr32[3], destp,
sp->sk_state,
- tp->write_seq-tp->snd_una,
- (sp->sk_state == TCP_LISTEN) ? sp->sk_ack_backlog : (tp->rcv_nxt - tp->copied_seq),
+ (sp->sk_state == TCP_LISTEN) ? sp->sk_max_ack_backlog:
+ tp->write_seq-tp->snd_una,
+ (sp->sk_state == TCP_LISTEN) ? sp->sk_ack_backlog :
+ (tp->rcv_nxt - tp->copied_seq),
timer_active,
jiffies_to_clock_t(timer_expires - jiffies),
icsk->icsk_retransmits,
-
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