Re: [PATCH] tests/acceptance: Add a test with the Fedora 31 kernel and initrd

[Thomas Huth <thuth@redhat.com>]

On 16/12/2020 11.57, Thomas Huth wrote:
> This initrd contains a virtio-net and a virtio-gpu kernel module,
> so we can check that we can set a MAC address for the network device
> and that we can successfully write some stuff into the emulated
> framebuffer of the virtio-gpu device.
> 
> Signed-off-by: Thomas Huth <thuth@redhat.com>
> ---
>  Based-on: 20201215183623.110128-1-thuth@redhat.com
> 
>  tests/acceptance/machine_s390_ccw_virtio.py | 78 +++++++++++++++++++++
>  1 file changed, 78 insertions(+)
> 
> diff --git a/tests/acceptance/machine_s390_ccw_virtio.py b/tests/acceptance/machine_s390_ccw_virtio.py
> index abe25a08f0..a5be26b38e 100644
> --- a/tests/acceptance/machine_s390_ccw_virtio.py
> +++ b/tests/acceptance/machine_s390_ccw_virtio.py
> @@ -9,6 +9,8 @@
>  # This work is licensed under the terms of the GNU GPL, version 2 or
>  # later.  See the COPYING file in the top-level directory.
>  
> +import re
> +import tempfile
>  
>  from avocado_qemu import Test
>  from avocado_qemu import exec_command_and_wait_for_pattern
> @@ -150,3 +152,79 @@ class S390CCWVirtioMachine(Test):
>          self.vm.command('human-monitor-command', command_line='balloon 128')
>          exec_command_and_wait_for_pattern(self, 'head -n 1 /proc/meminfo',
>                                            'MemTotal:         115640 kB')
> +
> +
> +    def test_s390x_fedora(self):
> +
> +        """
> +        :avocado: tags=arch:s390x
> +        :avocado: tags=machine:s390-ccw-virtio
> +        """
> +
> +        kernel_url = ('https://archives.fedoraproject.org/pub/archive'
> +                      '/fedora-secondary/releases/31/Server/s390x/os'
> +                      '/images/kernel.img')
> +        kernel_hash = 'b93d1efcafcf29c1673a4ce371a1f8b43941cfeb'
> +        kernel_path = self.fetch_asset(kernel_url, asset_hash=kernel_hash)
> +
> +        initrd_url = ('https://archives.fedoraproject.org/pub/archive'
> +                      '/fedora-secondary/releases/31/Server/s390x/os'
> +                      '/images/initrd.img')
> +        initrd_hash = '3de45d411df5624b8d8ef21cd0b44419ab59b12f'
> +        initrd_path = self.fetch_asset(initrd_url, asset_hash=initrd_hash)
> +
> +        self.vm.set_console()
> +        kernel_command_line = (self.KERNEL_COMMON_COMMAND_LINE +
> +                              ' audit=0 rd.rescue')
> +        self.vm.add_args('-nographic',
> +                         '-smp', '4',
> +                         '-m', '512',
> +                         '-name', 'Some Guest Name',
> +                         '-uuid', '30de4fd9-b4d5-409e-86a5-09b387f70bfa',
> +                         '-kernel', kernel_path,
> +                         '-initrd', initrd_path,
> +                         '-append', kernel_command_line,
> +                         '-device', 'virtio-net-pci,mac=02:ca:fe:fa:ce:12',
> +                         '-device', 'virtio-rng-ccw',
> +                         '-device', 'virtio-gpu-ccw')
> +        self.vm.launch()
> +        self.wait_for_console_pattern('Entering emergency mode')
> +
> +        # Some tests to see whether the CLI options have been considered:
> +        exec_command_and_wait_for_pattern(self,
> +                             'cat /sys/class/net/enP1p0s0/address',
> +                             '02:ca:fe:fa:ce:12')
> +        exec_command_and_wait_for_pattern(self, 'cat /proc/cpuinfo',
> +                             'processors    : 4')
> +        exec_command_and_wait_for_pattern(self, 'grep MemTotal /proc/meminfo',
> +                             'MemTotal:         499848 kB')
> +        exec_command_and_wait_for_pattern(self, 'grep Name /proc/sysinfo',
> +                             'Extended Name:   Some Guest Name')
> +        exec_command_and_wait_for_pattern(self, 'grep UUID /proc/sysinfo',
> +                             '30de4fd9-b4d5-409e-86a5-09b387f70bfa')
> +
> +        # Disable blinking cursor, then write some stuff into the framebuffer
> +        # ("32-bit encoded", the screendump PPM will then only contain 24-bit)

As just discussed offline with Cornelia, this maybe needs some more
explanation, so I'd suggest to add something like:

 # Disable blinking cursor, then write some stuff into the
 # framebuffer. QEMU's PPM screendumps contain uncompressed
 # 24-bit values, while the framebuffer uses 32-bit, so we
 # pad our text with some spaces when writing to the frame-
 # buffer. Since the PPM is uncompressed, we then can simple
 # read the written "magic bytes" back from the PPM file to
 # check whether the framebuffer is working as expected.

Does that sound ok?

 Thomas


> +        exec_command_and_wait_for_pattern(self,
> +            'echo -e "\e[?25l" > /dev/tty0', ':/#')
> +        exec_command_and_wait_for_pattern(self, 'for ((i=0;i<500;i++)); do '
> +            'echo " The  qu ick  fo x j ump s o ver  a  laz y d og" >> fox.txt;'
> +            'done',
> +            ':/#')
> +        exec_command_and_wait_for_pattern(self,
> +            'dd if=fox.txt of=/dev/fb0 bs=1000 oflag=sync,nocache ; rm fox.txt',
> +            '24+0 records out')
> +        tmpfile = tempfile.NamedTemporaryFile(suffix='.ppm',
> +                                              prefix='qemu-scrdump-')
> +        self.vm.command('screendump', filename=tmpfile.name)
> +        ppmfile = open(tmpfile.name, "r")
> +        tmpfile.close
> +        line = ppmfile.readline()
> +        self.assertEqual(line, "P6\n")
> +        line = ppmfile.readline()
> +        self.assertEqual(line, "1024 768\n")
> +        line = ppmfile.readline()
> +        self.assertEqual(line, "255\n")
> +        line = ppmfile.readline()
> +        self.assertEqual(line, "The quick fox jumps over a lazy dog\n")
> +        ppmfile.close
>