From: David Miller <davem@davemloft.net>
To: mst@redhat.com
Cc: pagupta@redhat.com, linux-kernel@vger.kernel.org,
netdev@vger.kernel.org, jasowang@redhat.com, dgibson@redhat.com,
vfalico@gmail.com, edumazet@google.com, vyasevic@redhat.com,
hkchu@google.com, wuzhy@linux.vnet.ibm.com, xemul@parallels.com,
therbert@google.com, bhutchings@solarflare.com, xii@google.com,
stephen@networkplumber.org, jiri@resnulli.us,
sergei.shtylyov@cogentembedded.com
Subject: Re: [PATCH net-net 0/4] Increase the limit of tuntap queues
Date: Sun, 23 Nov 2014 20:23:21 -0500 (EST) [thread overview]
Message-ID: <20141123.202321.1426718936320546377.davem@davemloft.net> (raw)
In-Reply-To: <20141123203032.GA6286@redhat.com>
From: "Michael S. Tsirkin" <mst@redhat.com>
Date: Sun, 23 Nov 2014 22:30:32 +0200
> qemu runs in the host, but it's unpriveledged: it gets
> passed tun FDs by a priveledged daemon, and it only
> has the rights to some operations,
> in particular to attach and detach queues.
>
> The assumption always was that this operation is safe
> and can't make kernel run out of resources.
This creates a rather rediculous situation in my opinion.
Configuring a network device is a privileged operation, the daemon
should be setting this thing up.
In no other context would we have to worry about something like this.
next prev parent reply other threads:[~2014-11-24 1:23 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-11-18 16:22 [PATCH net-net 0/4] Increase the limit of tuntap queues Pankaj Gupta
2014-11-18 16:22 ` [PATCH net-next 1/4] net: allow large number of rx queues Pankaj Gupta
2014-11-18 20:29 ` Cong Wang
2014-11-20 16:31 ` Pankaj Gupta
2014-11-18 16:22 ` [PATCH net-next 2/4] tuntap: Accept tuntap maximum number of queues as sysctl Pankaj Gupta
2014-11-18 16:22 ` [PATCH net-next 3/4] tuntap: reduce the size of tun_struct by using flex array Pankaj Gupta
2014-11-18 16:22 ` [PATCH net-next 4/4] tuntap: Increase the number of queues in tun Pankaj Gupta
2014-11-19 1:43 ` [PATCH net-net 0/4] Increase the limit of tuntap queues Alexei Starovoitov
2014-11-19 20:16 ` David Miller
2014-11-19 20:44 ` Michael S. Tsirkin
2014-11-23 5:22 ` Pankaj Gupta
2014-11-23 10:46 ` Michael S. Tsirkin
2014-11-23 18:43 ` David Miller
2014-11-23 20:30 ` Michael S. Tsirkin
2014-11-24 1:23 ` David Miller [this message]
2014-11-24 8:02 ` Michael S. Tsirkin
2014-11-24 14:28 ` Pankaj Gupta
2014-11-24 3:23 ` Jason Wang
2014-11-24 7:55 ` Michael S. Tsirkin
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