cros-disks/cros-disks.conf

# Copyright 2011 The ChromiumOS Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

description     "cros-disks upstart job"
author          "chromium-os-dev@chromium.org"

oom score -100

env CROS_DISKS_OPTS=''

# Set the default polling interval in milliseconds on block devices.
# This in-kernel polling mechanism is available since kernel 2.6.38.
# The poll timer slack is set to 25% in kernel (linux/block/genhd.c).
# With a polling interval <= 1 second, the system seems to react to
# eject requests from a CD-ROM drive more responsively.
env BLOCK_DEFAULT_POLL_MSECS=1000
env BLOCK_DEFAULT_POLL_MSECS_SYSFS_PATH=/sys/module/block/parameters/events_dfl_poll_msecs

# Minimum log level defined in base/logging.h.
#   0:INFO, 1:WARNING, 2:ERROR, 3:ERROR_REPORT, 4:FATAL
#   -1:VLOG(1), -2:VLOG(2), etc
# Set to log only INFO or above by default.
env CROS_DISKS_LOG_LEVEL=1

# Importing the TZ environment variable to allow the time zone to be changed
# for tests.
import TZ

start on starting system-services
stop on stopping system-services

pre-start script
  # The TZ variable is only allowed to exist in test builds for running
  # autotests. The existence, even if set to empty, of TZ interferes with the
  # regular functioning of the system timezone.
  if crossystem "cros_debug?0" && [ -n "${TZ+set}" ]; then
    logger -t "${UPSTART_JOB}" "TZ variable set in non-debug mode"
    exit 1
  fi

  # Set default polling interval on block devices.
  # This only affects block devices with removable media, which do not
  # support asynchronous media change/eject events.
  if [ -f "${BLOCK_DEFAULT_POLL_MSECS_SYSFS_PATH}" ]; then
    echo "${BLOCK_DEFAULT_POLL_MSECS}" > "${BLOCK_DEFAULT_POLL_MSECS_SYSFS_PATH}"
  fi

  # Load the FUSE module, which is used by various FUSE mounters.
  # cros-disks should still run even if the FUSE module fails to load.
  logger -t "${UPSTART_JOB}" "Loading FUSE module"
  modprobe fuse || logger -t "${UPSTART_JOB}" "Failed to load FUSE module"
end script

tmpfiles /usr/lib/tmpfiles.d/on-demand/cros-disks.conf

post-stop script
  if [ -f "${BLOCK_DEFAULT_POLL_MSECS_SYSFS_PATH}" ]; then
    # Disable default polling on block devices.
    echo 0 > "${BLOCK_DEFAULT_POLL_MSECS_SYSFS_PATH}"
  fi
end script

respawn
expect fork

exec minijail0 --config /usr/share/minijail/cros-disks.conf \
  -- /usr/bin/cros-disks --foreground \
       --log_level="${CROS_DISKS_LOG_LEVEL}" ${CROS_DISKS_OPTS}