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

On Tue, 26 Jun 2012 13:45:52 +0200 Kevin Wolf <kwolf@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.