[libvirt] [Qemu-devel] [PATCH v4 0/7] file descriptor passing using pass-fd

[Luiz Capitulino]

On Tue, 26 Jun 2012 13:45:52 +0200
Kevin Wolf <kwolf at redhat.com> wrote:

> Am 26.06.2012 11:10, schrieb Daniel P. Berrange:
> > I was thinking about some of the sources complexity when using
> > FD passing from libvirt and wanted to raise one idea for discussion
> > before we continue.
> > 
> > With this proposed series, we have usage akin to:
> > 
> >   1. pass_fd FDSET={M} -> returns a string "/dev/fd/N" showing QEMU's
> >      view of the FD
> >   2. drive_add file=/dev/fd/N
> >   3. if failure:
> >        close_fd "/dev/fd/N"
> 
> In fact, there are more steps:
> 
> 4. use it successfully
> 5. close_fd "/dev/fd/N"
> 
> I think it would well be possible that qemu just closes the fd when it's
> not used internally any more.

pass-fd could have a flag indicating qemu to do that.