netdev - Re: [PATCH net] rxrpc: Fix lack of conn cleanup when local endpoint is cleaned up [ver #2]

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Date:   Sun, 01 Sep 2019 08:14:56 +0100
From:   David Howells <dhowells@...hat.com>
To:     Hillf Danton <hdanton@...a.com>
Cc:     dhowells@...hat.com, netdev@...r.kernel.org,
        marc.dionne@...istor.com, linux-afs@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH net] rxrpc: Fix lack of conn cleanup when local endpoint is cleaned up [ver #2]

Hillf Danton <hdanton@...a.com> wrote:

> > It's certainly possible that that can happen.  The reaper is per
> > network-namespace.
> > 
> > conn->params.local holds a ref on the local endpoint.
> > 
> Then local endpoint can not become dead without connection reaper
> running first, because of the ref held by connection. When it is
> dead, however, there is no need to run reaper directly (rather than
> through a workqueue).

The reaper is per-net_ns, not per-local.  There may be more than one local
endpoint in a net_ns and they share the list of service connections.

David