Commit 833a8b40 authored by Haishuang Yan's avatar Haishuang Yan Committed by David S. Miller

ip_tunnel: fix ip tunnel lookup in collect_md mode

In collect_md mode, if the tun dev is down, it still can call
ip_tunnel_rcv to receive on packets, and the rx statistics increase

When the md tunnel is down, it's not neccessary to increase RX drops
for the tunnel device, packets would be recieved on fallback tunnel,
and the RX drops on fallback device will be increased as expected.

Fixes: 2e15ea39 ("ip_gre: Add support to collect tunnel metadata.")
Cc: Pravin B Shelar <[email protected]>
Signed-off-by: default avatarHaishuang Yan <[email protected]>
Acked-by: default avatarPravin B Shelar <[email protected]>
Signed-off-by: default avatarDavid S. Miller <[email protected]>
parent 6399ebcc
......@@ -176,7 +176,7 @@ struct ip_tunnel *ip_tunnel_lookup(struct ip_tunnel_net *itn,
return cand;
t = rcu_dereference(itn->collect_md_tun);
if (t)
if (t && t->dev->flags & IFF_UP)
return t;
if (itn->fb_tunnel_dev && itn->fb_tunnel_dev->flags & IFF_UP)
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