Module Name: src
Committed By: darran
Date: Wed Sep 9 22:41:28 UTC 2009
Modified Files:
src/sys/netinet: tcp_input.c tcp_usrreq.c tcp_var.h
Log Message:
Make tcp msl (max segment life) tunable via sysctl net.inet.tcp.msl.
Okayed by t...@.
To generate a diff of this commit:
cvs rdiff -u -r1.298 -r1.299 src/sys/netinet/tcp_input.c
cvs rdiff -u -r1.155 -r1.156 src/sys/netinet/tcp_usrreq.c
cvs rdiff -u -r1.160 -r1.161 src/sys/netinet/tcp_var.h
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/netinet/tcp_input.c
diff -u src/sys/netinet/tcp_input.c:1.298 src/sys/netinet/tcp_input.c:1.299
--- src/sys/netinet/tcp_input.c:1.298 Sat Jul 18 23:09:53 2009
+++ src/sys/netinet/tcp_input.c Wed Sep 9 22:41:28 2009
@@ -1,4 +1,4 @@
-/* $NetBSD: tcp_input.c,v 1.298 2009/07/18 23:09:53 minskim Exp $ */
+/* $NetBSD: tcp_input.c,v 1.299 2009/09/09 22:41:28 darran Exp $ */
/*
* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
@@ -145,7 +145,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: tcp_input.c,v 1.298 2009/07/18 23:09:53 minskim Exp $");
+__KERNEL_RCSID(0, "$NetBSD: tcp_input.c,v 1.299 2009/09/09 22:41:28 darran Exp $");
#include "opt_inet.h"
#include "opt_ipsec.h"
@@ -242,6 +242,7 @@
int tcp_do_autorcvbuf = 0;
int tcp_autorcvbuf_inc = 16 * 1024;
int tcp_autorcvbuf_max = 256 * 1024;
+int tcp_msl = (TCPTV_MSL / PR_SLOWHZ);
static int tcp_rst_ppslim_count = 0;
static struct timeval tcp_rst_ppslim_last;
@@ -2499,7 +2500,8 @@
if (ourfinisacked) {
tp->t_state = TCPS_TIME_WAIT;
tcp_canceltimers(tp);
- TCP_TIMER_ARM(tp, TCPT_2MSL, 2 * TCPTV_MSL);
+ TCP_TIMER_ARM(tp, TCPT_2MSL,
+ 2 * PR_SLOWHZ * tcp_msl);
soisdisconnected(so);
}
break;
@@ -2523,7 +2525,7 @@
* it and restart the finack timer.
*/
case TCPS_TIME_WAIT:
- TCP_TIMER_ARM(tp, TCPT_2MSL, 2 * TCPTV_MSL);
+ TCP_TIMER_ARM(tp, TCPT_2MSL, 2 * PR_SLOWHZ * tcp_msl);
goto dropafterack;
}
}
@@ -2707,7 +2709,7 @@
case TCPS_FIN_WAIT_2:
tp->t_state = TCPS_TIME_WAIT;
tcp_canceltimers(tp);
- TCP_TIMER_ARM(tp, TCPT_2MSL, 2 * TCPTV_MSL);
+ TCP_TIMER_ARM(tp, TCPT_2MSL, 2 * PR_SLOWHZ * tcp_msl);
soisdisconnected(so);
break;
@@ -2715,7 +2717,7 @@
* In TIME_WAIT state restart the 2 MSL time_wait timer.
*/
case TCPS_TIME_WAIT:
- TCP_TIMER_ARM(tp, TCPT_2MSL, 2 * TCPTV_MSL);
+ TCP_TIMER_ARM(tp, TCPT_2MSL, 2 * PR_SLOWHZ * tcp_msl);
break;
}
}
Index: src/sys/netinet/tcp_usrreq.c
diff -u src/sys/netinet/tcp_usrreq.c:1.155 src/sys/netinet/tcp_usrreq.c:1.156
--- src/sys/netinet/tcp_usrreq.c:1.155 Sun Jun 7 16:20:29 2009
+++ src/sys/netinet/tcp_usrreq.c Wed Sep 9 22:41:28 2009
@@ -1,4 +1,4 @@
-/* $NetBSD: tcp_usrreq.c,v 1.155 2009/06/07 16:20:29 rmind Exp $ */
+/* $NetBSD: tcp_usrreq.c,v 1.156 2009/09/09 22:41:28 darran Exp $ */
/*
* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
@@ -95,7 +95,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: tcp_usrreq.c,v 1.155 2009/06/07 16:20:29 rmind Exp $");
+__KERNEL_RCSID(0, "$NetBSD: tcp_usrreq.c,v 1.156 2009/09/09 22:41:28 darran Exp $");
#include "opt_inet.h"
#include "opt_ipsec.h"
@@ -1689,6 +1689,12 @@
CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL);
sysctl_createv(clog, 0, NULL, NULL,
CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
+ CTLTYPE_INT, "msl",
+ SYSCTL_DESCR("Maximum Segment Life"),
+ NULL, 0, &tcp_msl, 0,
+ CTL_NET, pf, IPPROTO_TCP, TCPCTL_MSL, CTL_EOL);
+ sysctl_createv(clog, 0, NULL, NULL,
+ CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
CTLTYPE_INT, "syn_cache_limit",
SYSCTL_DESCR("Maximum number of entries in the TCP "
"compressed state engine"),
Index: src/sys/netinet/tcp_var.h
diff -u src/sys/netinet/tcp_var.h:1.160 src/sys/netinet/tcp_var.h:1.161
--- src/sys/netinet/tcp_var.h:1.160 Wed May 27 17:41:03 2009
+++ src/sys/netinet/tcp_var.h Wed Sep 9 22:41:28 2009
@@ -1,4 +1,4 @@
-/* $NetBSD: tcp_var.h,v 1.160 2009/05/27 17:41:03 pooka Exp $ */
+/* $NetBSD: tcp_var.h,v 1.161 2009/09/09 22:41:28 darran Exp $ */
/*
* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
@@ -686,7 +686,8 @@
#define TCPCTL_DEBUG 31 /* TCP debug sockets */
#define TCPCTL_DEBX 32 /* # of tcp debug sockets */
#define TCPCTL_DROP 33 /* drop tcp connection */
-#define TCPCTL_MAXID 34
+#define TCPCTL_MSL 34 /* Max Segment Life */
+#define TCPCTL_MAXID 35
#define TCPCTL_NAMES { \
{ 0, 0 }, \
@@ -723,6 +724,7 @@
{ "debug", CTLTYPE_STRUCT }, \
{ "debx", CTLTYPE_INT }, \
{ "drop", CTLTYPE_STRUCT }, \
+ { "msl", CTLTYPE_INT }, \
}
#ifdef _KERNEL
@@ -734,6 +736,7 @@
extern int tcp_do_timestamps; /* RFC1323 timestamps enabled/disabled? */
extern int tcp_mssdflt; /* default seg size */
extern int tcp_minmss; /* minimal seg size */
+extern int tcp_msl; /* max segment life */
extern int tcp_init_win; /* initial window */
extern int tcp_init_win_local; /* initial window for local nets */
extern int tcp_mss_ifmtu; /* take MSS from interface, not in_maxmtu */
