Commit 07d92d5c authored Sep 17, 2014 by Nicolas Dichtel Committed by David S. Miller Sep 22, 2014

macvlan: allow to enqueue broadcast pkt on virtual device



Since commit 412ca155 ("macvlan: Move broadcasts into a work queue"), the
driver uses tx_queue_len of the master device as the limit of packets enqueuing.
Problem is that virtual drivers have this value set to 0, thus all broadcast
packets were rejected.
Because tx_queue_len was arbitrarily chosen, I replace it with a static limit
of 1000 (also arbitrarily chosen).

CC: Herbert Xu <herbert@gondor.apana.org.au>
Reported-by: Thibaut Collet <thibaut.collet@6wind.com>
Suggested-by: Thibaut Collet <thibaut.collet@6wind.com>
Tested-by: Thibaut Collet <thibaut.collet@6wind.com>
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent 4e5f9ef3

drivers/net/macvlan.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -36,6 +36,7 @@
		#include <linux/netpoll.h>

		#define MACVLAN_HASH_SIZE (1 << BITS_PER_BYTE)
		#define MACVLAN_BC_QUEUE_LEN 1000

		struct macvlan_port {
		struct net_device *dev;
		@@ -248,7 +249,7 @@ static void macvlan_broadcast_enqueue(struct macvlan_port *port,
		goto err;

		spin_lock(&port->bc_queue.lock);
		if (skb_queue_len(&port->bc_queue) < skb->dev->tx_queue_len) {
		if (skb_queue_len(&port->bc_queue) < MACVLAN_BC_QUEUE_LEN) {
		__skb_queue_tail(&port->bc_queue, nskb);
		err = 0;
		}