Re: [PATCH v2] tests/acceptance: test hot(un)plug of ccw devices

[Cornelia Huck <cohuck@redhat.com>]

On Fri, 4 Dec 2020 11:05:34 -0300
Wainer dos Santos Moschetta <wainersm@redhat.com> wrote:

> Hi,
> 
> On 12/4/20 9:14 AM, Cornelia Huck wrote:
> > Hotplug a virtio-net-ccw device, and then hotunplug it again.
> >
> > Signed-off-by: Cornelia Huck <cohuck@redhat.com>
> > ---
> >
> > v1->v2:
> > - switch device id
> > - clear out dmesg before looking for CRW messages
> >
> > ---
> >   tests/acceptance/machine_s390_ccw_virtio.py | 16 ++++++++++++++++
> >   1 file changed, 16 insertions(+)
> >
> > diff --git a/tests/acceptance/machine_s390_ccw_virtio.py b/tests/acceptance/machine_s390_ccw_virtio.py
> > index 53b8484f8f9c..83c00190621b 100644
> > --- a/tests/acceptance/machine_s390_ccw_virtio.py
> > +++ b/tests/acceptance/machine_s390_ccw_virtio.py
> > @@ -97,3 +97,19 @@ class S390CCWVirtioMachine(Test):
> >           exec_command_and_wait_for_pattern(self,
> >                                             'cat /sys/bus/pci/devices/000a\:00\:00.0/function_id',
> >                                             '0x0000000c')
> > +        # add another device
> > +        exec_command_and_wait_for_pattern(self, 'dmesg -c', ' ')  
> 
> 
> The problem is that `dmesg -c` will fail if you run the test with 
> unprivileged user.

Hm, why should that make a difference for a guest command?

> 
> - Wainer
> 
> > +        self.vm.command('device_add', driver='virtio-net-ccw',
> > +                        devno='fe.0.4711', id='net_4711')
> > +        exec_command_and_wait_for_pattern(self, 'dmesg', 'CRW')
> > +        exec_command_and_wait_for_pattern(self, 'ls /sys/bus/ccw/devices/',
> > +                                          '0.0.4711')
> > +        # and detach it again
> > +        exec_command_and_wait_for_pattern(self, 'dmesg -c', ' ')
> > +        self.vm.command('device_del', id='net_4711')
> > +        self.vm.event_wait(name='DEVICE_DELETED',
> > +                           match={'data': {'device': 'net_4711'}})
> > +        exec_command_and_wait_for_pattern(self, 'dmesg', 'CRW')
> > +        exec_command_and_wait_for_pattern(self,
> > +                                          'ls /sys/bus/ccw/devices/0.0.4711',
> > +                                          'No such file or directory')