From: WANG Cong Date: Wed, 12 Feb 2014 01:21:26 +0000 (-0800) Subject: net: allow setting mac address of loopback device X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=25f929fbff0d1bcebf2e92656d33025cd330cbf8;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git net: allow setting mac address of loopback device We are trying to mirror the local traffic from lo to eth0, allowing setting mac address of lo to eth0 would make the ether addresses in these packets correct, so that we don't have to modify the ether header again. Since usually no one cares about its mac address (all-zero), it is safe to allow those who care to set its mac address. Cc: Hannes Frederic Sowa Cc: Neil Horman Cc: Stephen Hemminger Cc: Eric Dumazet Cc: David S. Miller Signed-off-by: Cong Wang Acked-by: Neil Horman Signed-off-by: David S. Miller --- diff --git a/drivers/net/loopback.c b/drivers/net/loopback.c index c5011e078e1b..e7c1d5f8ab51 100644 --- a/drivers/net/loopback.c +++ b/drivers/net/loopback.c @@ -160,6 +160,7 @@ static const struct net_device_ops loopback_ops = { .ndo_init = loopback_dev_init, .ndo_start_xmit= loopback_xmit, .ndo_get_stats64 = loopback_get_stats64, + .ndo_set_mac_address = eth_mac_addr, }; /* @@ -174,6 +175,7 @@ static void loopback_setup(struct net_device *dev) dev->tx_queue_len = 0; dev->type = ARPHRD_LOOPBACK; /* 0x0001*/ dev->flags = IFF_LOOPBACK; + dev->priv_flags |= IFF_LIVE_ADDR_CHANGE; dev->priv_flags &= ~IFF_XMIT_DST_RELEASE; dev->hw_features = NETIF_F_ALL_TSO | NETIF_F_UFO; dev->features = NETIF_F_SG | NETIF_F_FRAGLIST