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Re: [Qemu-devel] qemu -netdev tun/tap support can't handle macvtap type


From: Peter Maydell
Subject: Re: [Qemu-devel] qemu -netdev tun/tap support can't handle macvtap type devices
Date: Thu, 8 Dec 2016 15:37:50 +0000

On 8 December 2016 at 01:52, Jason Wang <address@hidden> wrote:
> On 2016年12月07日 22:32, Peter Maydell wrote:
>> It's particularly confusing in this case that fd= doesn't work with
>> queues=, because the user isn't trying to pass multiple fds, just
>> the one is fine.
>
>
> Since fd can only accept on file descriptor, so it implies 1 queue. For
> "fds", specifying queues seems redundant, since qemu can count the #fds by
> itself.

Opening /dev/net/tun like net/tap-linux.c does also only gives
you one file descriptor, but it still supports multiple queues,
unless I'm misunderstanding how this works (quite possible).

thanks
-- PMM



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