From f1d9268e061863ead77b07f5a6807d063e28a1c2 Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Tue, 14 Dec 2021 07:09:33 -0800 Subject: net: add net device refcount tracker to struct packet_type Most notable changes are in af_packet, tipc ones are trivial. Signed-off-by: Eric Dumazet Cc: Jon Maloy Cc: Ying Xue Signed-off-by: David S. Miller --- net/packet/af_packet.c | 14 +++++++++++--- net/tipc/bearer.c | 4 ++-- 2 files changed, 13 insertions(+), 5 deletions(-) (limited to 'net') diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c index a1ffdb48cc47..71854a16afbb 100644 --- a/net/packet/af_packet.c +++ b/net/packet/af_packet.c @@ -3109,7 +3109,7 @@ static int packet_release(struct socket *sock) packet_cached_dev_reset(po); if (po->prot_hook.dev) { - dev_put(po->prot_hook.dev); + dev_put_track(po->prot_hook.dev, &po->prot_hook.dev_tracker); po->prot_hook.dev = NULL; } spin_unlock(&po->bind_lock); @@ -3217,18 +3217,25 @@ static int packet_do_bind(struct sock *sk, const char *name, int ifindex, WRITE_ONCE(po->num, proto); po->prot_hook.type = proto; + dev_put_track(dev_curr, &po->prot_hook.dev_tracker); + dev_curr = NULL; + if (unlikely(unlisted)) { dev_put(dev); po->prot_hook.dev = NULL; WRITE_ONCE(po->ifindex, -1); packet_cached_dev_reset(po); } else { + if (dev) + netdev_tracker_alloc(dev, + &po->prot_hook.dev_tracker, + GFP_ATOMIC); po->prot_hook.dev = dev; WRITE_ONCE(po->ifindex, dev ? dev->ifindex : 0); packet_cached_dev_assign(po, dev); } } - dev_put(dev_curr); + dev_put_track(dev_curr, &po->prot_hook.dev_tracker); if (proto == 0 || !need_rehook) goto out_unlock; @@ -4138,7 +4145,8 @@ static int packet_notifier(struct notifier_block *this, if (msg == NETDEV_UNREGISTER) { packet_cached_dev_reset(po); WRITE_ONCE(po->ifindex, -1); - dev_put(po->prot_hook.dev); + dev_put_track(po->prot_hook.dev, + &po->prot_hook.dev_tracker); po->prot_hook.dev = NULL; } spin_unlock(&po->bind_lock); diff --git a/net/tipc/bearer.c b/net/tipc/bearer.c index 60bc74b76adc..473a790f5894 100644 --- a/net/tipc/bearer.c +++ b/net/tipc/bearer.c @@ -787,7 +787,7 @@ int tipc_attach_loopback(struct net *net) if (!dev) return -ENODEV; - dev_hold(dev); + dev_hold_track(dev, &tn->loopback_pt.dev_tracker, GFP_KERNEL); tn->loopback_pt.dev = dev; tn->loopback_pt.type = htons(ETH_P_TIPC); tn->loopback_pt.func = tipc_loopback_rcv_pkt; @@ -800,7 +800,7 @@ void tipc_detach_loopback(struct net *net) struct tipc_net *tn = tipc_net(net); dev_remove_pack(&tn->loopback_pt); - dev_put(net->loopback_dev); + dev_put_track(net->loopback_dev, &tn->loopback_pt.dev_tracker); } /* Caller should hold rtnl_lock to protect the bearer */ -- cgit v1.2.3