netdev - Re: [PATCH v3 1/3] VSOCK: Add vsockmon tap functions

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Date:   Thu, 13 Apr 2017 16:01:33 +0100
From:   Stefan Hajnoczi <stefanha@...hat.com>
To:     "Michael S. Tsirkin" <mst@...hat.com>
Cc:     netdev@...r.kernel.org, Zhu Yanjun <zyjzyj2000@...il.com>,
        Gerard Garcia <ggarcia@...a.uab.cat>,
        Jorgen Hansen <jhansen@...are.com>
Subject: Re: [PATCH v3 1/3] VSOCK: Add vsockmon tap functions

On Wed, Apr 12, 2017 at 07:37:36PM +0300, Michael S. Tsirkin wrote:
> On Wed, Apr 12, 2017 at 05:08:23PM +0100, Stefan Hajnoczi wrote:
> > +int __vsock_remove_tap(struct vsock_tap *vt) {
> > +	bool found = false;
> > +	struct vsock_tap *tmp;
> > +
> > +	spin_lock(&vsock_tap_lock);
> > +
> > +	list_for_each_entry(tmp, &vsock_tap_all, list) {
> > +		if (vt == tmp) {
> > +			list_del_rcu(&vt->list);
> > +			found = true;
> > +			goto out;
> > +		}
> > +	}
> > +
> > +	pr_warn("__vsock_remove_tap: %p not found\n", vt);
> > +out:
> > +	spin_unlock(&vsock_tap_lock);
> > +
> > +	if (found)
> > +		module_put(vt->module);
> 
> This is called before synchronize_net so there might
> still be users for this tap.

Thanks, will fix.

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