From 9038c320001dd07f60736018edf608ac5baca0ab Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Sat, 4 Dec 2021 20:22:03 -0800 Subject: net: dst: add net device refcount tracking to dst_entry We want to track all dev_hold()/dev_put() to ease leak hunting. Signed-off-by: Eric Dumazet Signed-off-by: Jakub Kicinski --- net/ipv4/route.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) (limited to 'net/ipv4') diff --git a/net/ipv4/route.c b/net/ipv4/route.c index 243a0c52be42..843a7a3699fe 100644 --- a/net/ipv4/route.c +++ b/net/ipv4/route.c @@ -1531,8 +1531,9 @@ void rt_flush_dev(struct net_device *dev) if (rt->dst.dev != dev) continue; rt->dst.dev = blackhole_netdev; - dev_hold(rt->dst.dev); - dev_put(dev); + dev_replace_track(dev, blackhole_netdev, + &rt->dst.dev_tracker, + GFP_ATOMIC); } spin_unlock_bh(&ul->lock); } @@ -2819,7 +2820,7 @@ struct dst_entry *ipv4_blackhole_route(struct net *net, struct dst_entry *dst_or new->output = dst_discard_out; new->dev = net->loopback_dev; - dev_hold(new->dev); + dev_hold_track(new->dev, &new->dev_tracker, GFP_ATOMIC); rt->rt_is_input = ort->rt_is_input; rt->rt_iif = ort->rt_iif; -- cgit