From 649b0755ccce0f17a04fdbc37c93166fa6612edb Mon Sep 17 00:00:00 2001
From: "osdl.net!shemminger" <osdl.net!shemminger>
Date: Tue, 31 Aug 2004 17:45:21 +0000
Subject: [PATCH] Handle new/old API and new additions to tc_stats.

2004/08/29 10:20:25-07:00 net[shemminger]!shemminger
Import patch reqs-patch-iproute2-2.6.8

(Logical change 1.77)
---
 tc/tc_qdisc.c | 53 ++++++++++++++++++++++++++++-----------------------
 1 file changed, 29 insertions(+), 24 deletions(-)

diff --git a/tc/tc_qdisc.c b/tc/tc_qdisc.c
index eb451a47..8f324895 100644
--- a/tc/tc_qdisc.c
+++ b/tc/tc_qdisc.c
@@ -167,34 +167,44 @@ int tc_qdisc_modify(int cmd, unsigned flags, int argc, char **argv)
 	return 0;
 }
 
-void print_tcstats(FILE *fp, struct tc_stats *st)
+
+void print_tcstats_attr(FILE *fp, const struct rtattr *rta)
 {
+	struct tc_stats st;
 	SPRINT_BUF(b1);
 
-	fprintf(fp, " Sent %llu bytes %u pkts (dropped %u, overlimits %u ) ",
-		(unsigned long long)st->bytes, st->packets, st->drops, st->overlimits);
-	if (st->bps || st->pps || st->qlen || st->backlog) {
+	/* handle case where kernel returns more/less than we know about */
+	memset(&st, 0, sizeof(st));
+	memcpy(&st, RTA_DATA(rta), MIN(RTA_PAYLOAD(rta), sizeof(st)));
+
+	fprintf(fp, " Sent %llu bytes %u pkts (dropped %u, overlimits %u requeus%u ) ",
+		(unsigned long long)st.bytes, st.packets, st.drops, 
+		st.overlimits, st.reqs);
+
+	if (st.bps || st.pps || st.qlen || st.backlog) {
 		fprintf(fp, "\n ");
-		if (st->bps || st->pps) {
+		if (st.bps || st.pps) {
 			fprintf(fp, "rate ");
-			if (st->bps)
-				fprintf(fp, "%s ", sprint_rate(st->bps, b1));
-			if (st->pps)
-				fprintf(fp, "%upps ", st->pps);
+			if (st.bps)
+				fprintf(fp, "%s ", sprint_rate(st.bps, b1));
+			if (st.pps)
+				fprintf(fp, "%upps ", st.pps);
 		}
-		if (st->qlen || st->backlog) {
+		if (st.qlen || st.backlog) {
 			fprintf(fp, "backlog ");
-			if (st->backlog)
-				fprintf(fp, "%s ", sprint_size(st->backlog, b1));
-			if (st->qlen)
-				fprintf(fp, "%up ", st->qlen);
+			if (st.backlog)
+				fprintf(fp, "%s ", sprint_size(st.backlog, b1));
+			if (st.qlen)
+				fprintf(fp, "%up ", st.qlen);
 		}
 	}
 }
 
 static int filter_ifindex;
 
-int print_qdisc(struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
+static int print_qdisc(const struct sockaddr_nl *who, 
+		       const struct nlmsghdr *n, 
+		       void *arg)
 {
 	FILE *fp = (FILE*)arg;
 	struct tcmsg *t = NLMSG_DATA(n);
@@ -255,16 +265,11 @@ int print_qdisc(struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
 	fprintf(fp, "\n");
 	if (show_stats) {
 		if (tb[TCA_STATS]) {
-			if (RTA_PAYLOAD(tb[TCA_STATS]) < sizeof(struct tc_stats))
-				fprintf(fp, "statistics truncated");
-			else {
-				struct tc_stats st;
-				memcpy(&st, RTA_DATA(tb[TCA_STATS]), sizeof(st));
-				print_tcstats(fp, &st);
-				fprintf(fp, "\n");
-			}
+			print_tcstats_attr(fp, tb[TCA_STATS]);
+			fprintf(fp, "\n");
 		}
-		if (q && tb[TCA_XSTATS]) {
+
+		if (q && tb[TCA_XSTATS] && q->print_xstats) {
 			q->print_xstats(q, fp, tb[TCA_XSTATS]);
 			fprintf(fp, "\n");
 		}