diff mbox

[iproute2] ip: Support IFLA_TXQLEN in ip link command

Message ID 4AE068EB.70005@gmail.com
State Not Applicable, archived
Delegated to: David Miller
Headers show

Commit Message

Eric Dumazet Oct. 22, 2009, 2:15 p.m. UTC 
We currently use an expensive ioctl() to get device txqueuelen, while
rtnetlink gave it to us for free. This patch speeds up ip link operation
when many devices are registered.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
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diff mbox

Patch

diff --git a/ip/ipaddress.c b/ip/ipaddress.c
index 267ecb3..f06a3f7 100644
--- a/ip/ipaddress.c
+++ b/ip/ipaddress.c
@@ -252,9 +252,12 @@  int print_linkinfo(const struct sockaddr_nl *who,
 	if (tb[IFLA_OPERSTATE])
 		print_operstate(fp, *(__u8 *)RTA_DATA(tb[IFLA_OPERSTATE]));
 		
-	if (filter.showqueue)
-		print_queuelen(fp, (char*)RTA_DATA(tb[IFLA_IFNAME]));
-
+	if (filter.showqueue) {
+		if (tb[IFLA_TXQLEN])
+			fprintf(fp, "qlen %d ", *(int *)RTA_DATA(tb[IFLA_TXQLEN]));
+		else
+			print_queuelen(fp, (char *)RTA_DATA(tb[IFLA_IFNAME]));
+	}
 	if (!filter.family || filter.family == AF_PACKET) {
 		SPRINT_BUF(b1);
 		fprintf(fp, "%s", _SL_);