From c46eaf98a22429668aee87eb6999ad32cfde0337 Mon Sep 17 00:00:00 2001
From: tedu <tedu@openbsd.org>
Date: Tue, 24 Dec 2013 22:26:19 +0000
Subject: [PATCH] more fixing after circleq conversion. a better fix to check
 the prev pointer is forthcoming.

---
 usr.bin/netstat/inet.c      |  9 +++------
 usr.bin/systat/netstat.c    | 12 +++---------
 usr.bin/tcpbench/tcpbench.c | 17 ++++-------------
 3 files changed, 10 insertions(+), 28 deletions(-)

diff --git a/usr.bin/netstat/inet.c b/usr.bin/netstat/inet.c
index 685212250e1..070c6da6334 100644
--- a/usr.bin/netstat/inet.c
+++ b/usr.bin/netstat/inet.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: inet.c,v 1.127 2013/12/23 22:39:50 tedu Exp $	*/
+/*	$OpenBSD: inet.c,v 1.128 2013/12/24 22:26:19 tedu Exp $	*/
 /*	$NetBSD: inet.c,v 1.14 1995/10/03 21:42:37 thorpej Exp $	*/
 
 /*
@@ -124,14 +124,11 @@ protopr(u_long off, char *name, int af, u_int tableid, u_long pcbaddr)
 	istcp = strcmp(name, "tcp") == 0;
 	israw = strncmp(name, "ip", 2) == 0;
 	kread(off, &table, sizeof table);
-	prev = next = TAILQ_FIRST(&table.inpt_queue);
+	prev = NULL;
+	next = TAILQ_FIRST(&table.inpt_queue);
 
 	while (next != NULL) {
 		kread((u_long)next, &inpcb, sizeof inpcb);
-		if (TAILQ_PREV(&inpcb, inpthead, inp_queue) != prev) {
-			printf("???\n");
-			break;
-		}
 		prev = next;
 		next = TAILQ_NEXT(&inpcb, inp_queue);
 
diff --git a/usr.bin/systat/netstat.c b/usr.bin/systat/netstat.c
index 652aa32f94d..3f4f38e2aeb 100644
--- a/usr.bin/systat/netstat.c
+++ b/usr.bin/systat/netstat.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: netstat.c,v 1.37 2013/12/20 02:04:09 krw Exp $	*/
+/*	$OpenBSD: netstat.c,v 1.38 2013/12/24 22:26:20 tedu Exp $	*/
 /*	$NetBSD: netstat.c,v 1.3 1995/06/18 23:53:07 cgd Exp $	*/
 
 /*-
@@ -232,7 +232,7 @@ int
 read_ns(void)
 {
 	struct inpcbtable pcbtable;
-	struct inpcb *head, *prev, *next;
+	struct inpcb *next;
 	struct inpcb inpcb;
 	struct socket sockb;
 	struct tcpcb tcpcb;
@@ -262,16 +262,10 @@ read_ns(void)
 again:
 	KREAD(off, &pcbtable, sizeof (struct inpcbtable));
 
-	prev = head = (struct inpcb *)&((struct inpcbtable *)off)->inpt_queue;
 	next = TAILQ_FIRST(&pcbtable.inpt_queue);
 
-	while (next != head) {
+	while (next != NULL) {
 		KREAD(next, &inpcb, sizeof (inpcb));
-		if (TAILQ_PREV(&inpcb, inpthead, inp_queue) != prev) {
-			error("Kernel state in transition");
-			return 0;
-		}
-		prev = next;
 		next = TAILQ_NEXT(&inpcb, inp_queue);
 
 		if (!aflag) {
diff --git a/usr.bin/tcpbench/tcpbench.c b/usr.bin/tcpbench/tcpbench.c
index ce295c5319d..6ae22ec7a42 100644
--- a/usr.bin/tcpbench/tcpbench.c
+++ b/usr.bin/tcpbench/tcpbench.c
@@ -290,7 +290,7 @@ static u_long
 kfind_tcb(int sock)
 {
 	struct inpcbtable tcbtab;
-	struct inpcb *head, *next, *prev;
+	struct inpcb *next, *prev;
 	struct inpcb inpcb;
 	struct tcpcb tcpcb;
 
@@ -322,24 +322,15 @@ kfind_tcb(int sock)
 		fprintf(stderr, "Using PCB table at %lu\n", ptb->ktcbtab);
 retry:
 	kget(ptb->ktcbtab, &tcbtab, sizeof(tcbtab));
-	prev = head = (struct inpcb *)&TAILQ_FIRST(
-	    &((struct inpcbtable *)ptb->ktcbtab)->inpt_queue);
+	prev = NULL;
 	next = TAILQ_FIRST(&tcbtab.inpt_queue);
 
 	if (ptb->vflag >= 2)
-		fprintf(stderr, "PCB head at %p\n", head);
-	while (next != head) {
+		fprintf(stderr, "PCB start at %p\n", next);
+	while (next != NULL) {
 		if (ptb->vflag >= 2)
 			fprintf(stderr, "Checking PCB %p\n", next);
 		kget((u_long)next, &inpcb, sizeof(inpcb));
-		if (TAILQ_PREV(&inpcb, inpthead, inp_queue) != prev) {
-			if (nretry--) {
-				warnx("pcb prev pointer insane");
-				goto retry;
-			} else
-				errx(1, "pcb prev pointer insane,"
-				     " all attempts exausted");
-		}
 		prev = next;
 		next = TAILQ_NEXT(&inpcb, inp_queue);
 
-- 
2.20.1