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Date: Wed, 5 Aug 2020 06:44:09 -0400 From: Neil Horman <nhorman@...alhost.localdomain> To: David Miller <davem@...emloft.net> Cc: izabela.bakollari@...il.com, nhorman@...driver.com, kuba@...nel.org, netdev@...r.kernel.org, linux-kernel@...r.kernel.org, linux-kernel-mentees@...ts.linuxfoundation.org Subject: Re: [PATCHv2 net-next] dropwatch: Support monitoring of dropped frames On Tue, Aug 04, 2020 at 04:14:14PM -0700, David Miller wrote: > From: izabela.bakollari@...il.com > Date: Tue, 4 Aug 2020 18:09:08 +0200 > > > @@ -1315,6 +1334,53 @@ static int net_dm_cmd_trace(struct sk_buff *skb, > > return -EOPNOTSUPP; > > } > > > > +static int net_dm_interface_start(struct net *net, const char *ifname) > > +{ > > + struct net_device *nd = dev_get_by_name(net, ifname); > > + > > + if (nd) > > + interface = nd; > > + else > > + return -ENODEV; > > + > > + return 0; > > +} > > + > > +static int net_dm_interface_stop(struct net *net, const char *ifname) > > +{ > > + dev_put(interface); > > + interface = NULL; > > + > > + return 0; > > +} > > Where is the netdev notifier that will drop this reference if the network > device is unregistered? > See the changes to dropmon_net_event in the patch. Its there under the case for NETDEV_UNREGISTER Neil
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