105 lines
3.2 KiB
Nix
105 lines
3.2 KiB
Nix
# This module allows the test driver to connect to the virtual machine
|
|
# via a root shell attached to port 514.
|
|
|
|
{ config, pkgs, ... }:
|
|
|
|
with pkgs.lib;
|
|
|
|
let
|
|
kernel = config.boot.kernelPackages.kernel;
|
|
|
|
hasCIFSTimeout = if kernel ? features then kernel.features ? cifsTimeout
|
|
else (filter (p: p.name == "cifs-timeout") kernel.kernelPatches) != [];
|
|
in
|
|
|
|
{
|
|
|
|
config =
|
|
# Require a patch to the kernel to increase the 15s CIFS timeout.
|
|
mkAssert hasCIFSTimeout "
|
|
VM tests require that the kernel has the CIFS timeout patch.
|
|
" {
|
|
|
|
jobs.backdoor =
|
|
{ startOn = "started udev";
|
|
stopOn = "";
|
|
|
|
script =
|
|
''
|
|
export USER=root
|
|
export HOME=/root
|
|
export DISPLAY=:0.0
|
|
source /etc/profile
|
|
cd /tmp
|
|
exec < /dev/hvc0 > /dev/hvc0 2> /dev/ttyS0
|
|
echo "connecting to host..." >&2
|
|
stty -F /dev/hvc0 raw -echo # prevent nl -> cr/nl conversion
|
|
echo
|
|
PS1= /bin/sh
|
|
'';
|
|
|
|
respawn = false;
|
|
};
|
|
|
|
boot.initrd.postDeviceCommands =
|
|
''
|
|
# Using acpi_pm as a clock source causes the guest clock to
|
|
# slow down under high host load. This is usually a bad
|
|
# thing, but for VM tests it should provide a bit more
|
|
# determinism (e.g. if the VM runs at lower speed, then
|
|
# timeouts in the VM should also be delayed).
|
|
echo acpi_pm > /sys/devices/system/clocksource/clocksource0/current_clocksource
|
|
'';
|
|
|
|
boot.postBootCommands =
|
|
''
|
|
# Panic on out-of-memory conditions rather than letting the
|
|
# OOM killer randomly get rid of processes, since this leads
|
|
# to failures that are hard to diagnose.
|
|
echo 2 > /proc/sys/vm/panic_on_oom
|
|
|
|
# Coverage data is written into /tmp/coverage-data.
|
|
mkdir -p /tmp/xchg/coverage-data
|
|
|
|
# Mount debugfs to gain access to the kernel coverage data (if
|
|
# available).
|
|
mount -t debugfs none /sys/kernel/debug || true
|
|
'';
|
|
|
|
# If the kernel has been built with coverage instrumentation, make
|
|
# it available under /proc/gcov.
|
|
boot.kernelModules = [ "gcov-proc" ];
|
|
|
|
# Panic if an error occurs in stage 1 (rather than waiting for
|
|
# user intervention).
|
|
boot.kernelParams =
|
|
[ "console=tty1" "console=ttyS0" "panic=1" "stage1panic=1" ];
|
|
|
|
# `xwininfo' is used by the test driver to query open windows.
|
|
environment.systemPackages = [ pkgs.xorg.xwininfo ];
|
|
|
|
# Send all of /var/log/messages to the serial port.
|
|
services.syslogd.extraConfig = "*.* /dev/ttyS0";
|
|
|
|
# Disable "-- MARK --" messages. These prevent hanging tests from
|
|
# being killed after 1 hour of silence.
|
|
services.syslogd.extraParams = [ "-m 0" ];
|
|
|
|
# Don't run klogd. Kernel messages appear on the serial console anyway.
|
|
jobs.klogd.startOn = mkOverride 50 "";
|
|
|
|
# Prevent tests from accessing the Internet.
|
|
networking.defaultGateway = mkOverride 150 "";
|
|
networking.nameservers = mkOverride 150 [ ];
|
|
|
|
system.upstartEnvironment.GCOV_PREFIX = "/tmp/xchg/coverage-data";
|
|
|
|
system.requiredKernelConfig = with config.lib.kernelConfig; [
|
|
(isYes "SERIAL_8250_CONSOLE")
|
|
(isYes "SERIAL_8250")
|
|
(isEnabled "VIRTIO_CONSOLE")
|
|
];
|
|
};
|
|
|
|
}
|