# Copyright (C) 2017 by Jonathan G. Underwood # This file is part of mdraid-safe-timeouts. # # mdraid-safe-timeouts is free software: you can redistribute it # and/or modify it under the terms of the GNU General Public License # as published by the Free Software Foundation, either version 3 of # the License, or (at your option) any later version. # # Foobar is distributed in the hope that it will be useful, but # WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU # General Public License for more details. # # You should have received a copy of the GNU General Public License # along with mdraid-safe-timeouts. If not, see # . # This file causes block devices with Linux RAID (mdadm) signatures to # attempt to set safe timeouts for the drives involved # See udev(8) for syntax # Don't process any events if anaconda is running as anaconda brings up # raid devices manually ENV{ANACONDA}=="?*", GOTO="md_timeouts_end" SUBSYSTEM!="block|machinecheck", GOTO="md_timeouts_end" # "noiswmd" on kernel command line stops mdadm from handling # "isw" (aka IMSM - Intel RAID). # "nodmraid" on kernel command line stops mdadm from handling # "isw" or "ddf". IMPORT{cmdline}="nodmraid" ENV{nodmraid}=="?*", GOTO="md_timeouts_end" IMPORT{cmdline}="noiswmd" ENV{noiswmd}=="?*", GOTO="md_timeouts_end" # Set controller timeout for parent disk of each partition if the # partition is a mdraid partition of higher than raid 0, and the disk # doesn't have scterc turned on (i.e. if it's disabled or the disk # doesn't support it). We determine if the disk has SCTERC turned on # by examining the output of smartctl and seeing if it contains the # word "seconds". If the word "seconds" is found we take this to imply # STCERC is turned on, and take no action. Otherwise we set the drive # controller timeout to 180 seconds. It would be better to check the # exit status code of smartctl rather than grepping for "seconds", but # it's not clear what that will be in the three cases (supported and # turned on, supported but disabled, not supported). ENV{DEVTYPE}!="partition", GOTO="md_timeouts_end" IMPORT{program}="/sbin/mdadm --examine --export $devnode" ACTION!="remove", \ ENV{ID_FS_TYPE}=="linux_raid_member", \ ENV{MD_LEVEL}=="raid[1-9]*", \ TEST=="/sys/block/$parent/device/timeout", \ TEST=="/usr/sbin/smartctl", \ PROGRAM!="/bin/sh -c '/usr/sbin/smartctl -l scterc /dev/$parent | grep -q seconds && exit 0 || exit 1'", \ RUN+="/bin/sh -c 'echo 180 > /sys/block/$parent/device/timeout && /usr/bin/logger timeout for /dev/$parent set to 180 secs'" LABEL="md_timeouts_end"