[Date Prev][Date Next]   [Thread Prev][Thread Next]   [Thread Index] [Date Index] [Author Index]

Re: [libvirt] [PATCH 2/3] qemu: Fix QMP Capabability Probing Failure

On Mon, Nov 26, 2012 at 03:17:13PM +0100, Viktor Mihajlovski wrote:
> QMP Capability probing will fail if QEMU cannot bind to the
> QMP monitor socket in the qemu_driver->libDir directory.
> That's because the child process is stripped of all
> capabilities and this directory is chown'ed to the configured
> QEMU user/group (normally qemu:qemu) by the QEMU driver.
> To prevent this from happening, the driver startup will now pass
> the QEMU uid and gid down to the capability probing code.
> All capability probing invocations of QEMU will be run with
> the configured QEMU uid instead of libvirtd's.
> Furter, the pid file handling is moved to libvirt, as QEMU
> cannot write to the qemu_driver->runDir (root:root). This also
> means that the libvirt daemonizing must be used.
> Signed-off-by: Viktor Mihajlovski <mihajlov linux vnet ibm com>
> ---
>  src/qemu/qemu_capabilities.c | 88 ++++++++++++++++++++++++++++++++++----------
>  src/qemu/qemu_capabilities.h |  7 +++-
>  src/qemu/qemu_driver.c       |  4 +-
>  3 files changed, 76 insertions(+), 23 deletions(-)


A nice side effect of this is that the traditional non-QMP based
QEMU probing also now runs unprivileged

|: http://berrange.com      -o-    http://www.flickr.com/photos/dberrange/ :|
|: http://libvirt.org              -o-             http://virt-manager.org :|
|: http://autobuild.org       -o-         http://search.cpan.org/~danberr/ :|
|: http://entangle-photo.org       -o-       http://live.gnome.org/gtk-vnc :|

[Date Prev][Date Next]   [Thread Prev][Thread Next]   [Thread Index] [Date Index] [Author Index]