class ServoSysRqRepair(hosts.RepairAction):
"""
Repair a Chrome device by sending a system request to the kernel.
Sending 3 times the Alt+VolUp+x key combination (aka sysrq-x)
will ask the kernel to panic itself and reboot while conserving
the kernel logs in console ramoops.
"""
def repair(self, host):
if not host.servo:
raise hosts.AutoservRepairError('%s has no servo support.' %
host.hostname)
# Press 3 times Alt+VolUp+X
# no checking DUT health between each press as
# killing Chrome is not really likely to fix the DUT SSH.
for _ in range(3):
try:
host.servo.sysrq_x()
except error.TestFail, ex:
raise hosts.AutoservRepairError('cannot press sysrq-x: %s.' %
str(ex))
# less than 5 seconds between presses.
time.sleep(2.0)
if host.wait_up(host.BOOT_TIMEOUT):
# Collect logs once we regain ssh access before clobbering them.
local_log_dir = crashcollect.get_crashinfo_dir(host, 'after_sysrq')
host.collect_logs('/var/log', local_log_dir, ignore_errors=True)
# Collect crash info.
crashcollect.get_crashinfo(host, None)
return
raise hosts.AutoservRepairError('%s is still offline after sysrq-x.' %
host.hostname)
def _collect_logs(self, host):
"""Collect logs from a successfully repaired DUT."""
dirname = 'after_%s' % self.tag
local_log_dir = crashcollect.get_crashinfo_dir(host, dirname)
host.collect_logs('/var/log', local_log_dir, ignore_errors=True)
# Collect crash info.
crashcollect.get_crashinfo(host, None)
def repair(self, host):
if not host.servo:
raise hosts.AutoservRepairError('%s has no servo support.' %
host.hostname)
host.servo.get_power_state_controller().reset()
if host.wait_up(host.BOOT_TIMEOUT):
# Collect logs once we regain ssh access before clobbering them.
local_log_dir = crashcollect.get_crashinfo_dir(host, 'after_reset')
host.collect_logs('/var/log', local_log_dir, ignore_errors=True)
# Collect crash info.
crashcollect.get_crashinfo(host, None)
return
raise hosts.AutoservRepairError(
'%s is still offline after servo reset.' % host.hostname)