udev-md-raid-safe-timeouts.rules

   1 # Copyright (C) 2017 by Jonathan G. Underwood
   2 # This file is part of mdraid-safe-timeouts.
   3 #
   4 # mdraid-safe-timeouts is free software: you can redistribute it
   5 # and/or modify it under the terms of the GNU General Public License
   6 # as published by the Free Software Foundation, either version 3 of
   7 # the License, or (at your option) any later version.
   8 #
   9 # Foobar is distributed in the hope that it will be useful, but
  10 # WITHOUT ANY WARRANTY; without even the implied warranty of
  11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12 # General Public License for more details.
  13 #
  14 # You should have received a copy of the GNU General Public License
  15 # along with mdraid-safe-timeouts.  If not, see
  16 # <http://www.gnu.org/licenses/>.
  17
  18 # This file causes block devices with Linux RAID (mdadm) signatures to
  19 # attempt to set safe timeouts for the drives involved
  20 # See udev(8) for syntax
  21
  22 # Don't process any events if anaconda is running as anaconda brings up
  23 # raid devices manually
  24 ENV{ANACONDA}=="?*", GOTO="md_timeouts_end"
  25
  26 SUBSYSTEM!="block|machinecheck", GOTO="md_timeouts_end"
  27
  28 # "noiswmd" on kernel command line stops mdadm from handling
  29 # "isw" (aka IMSM - Intel RAID).
  30 # "nodmraid" on kernel command line stops mdadm from handling
  31 # "isw" or "ddf".
  32 IMPORT{cmdline}="nodmraid"
  33 ENV{nodmraid}=="?*", GOTO="md_timeouts_end"
  34 IMPORT{cmdline}="noiswmd"
  35 ENV{noiswmd}=="?*", GOTO="md_timeouts_end"
  36
  37 # Set controller timeout for parent disk of each partition if the
  38 # partition is a mdraid partition of higher than raid 0, and the disk
  39 # doesn't have scterc turned on (i.e. if it's disabled or the disk
  40 # doesn't support it). We determine if the disk has SCTERC turned on
  41 # by examining the output of smartctl and seeing if it contains the
  42 # word "seconds". If the word "seconds" is found we take this to imply
  43 # STCERC is turned on, and take no action. Otherwise we set the drive
  44 # controller timeout to 180 seconds. It would be better to check the
  45 # exit status code of smartctl rather than grepping for "seconds", but
  46 # it's not clear what that will be in the three cases (supported and
  47 # turned on, supported but disabled, not supported).
  48
  49 ENV{DEVTYPE}!="partition", GOTO="md_timeouts_end"
  50
  51 IMPORT{program}="/sbin/mdadm --examine --export $devnode"
  52
  53 ACTION=="add|change", \
  54   ENV{ID_FS_TYPE}=="linux_raid_member", \
  55   ENV{MD_LEVEL}=="raid[1-9]*", \
  56   TEST=="/sys/block/$parent/device/timeout", \
  57   TEST=="/usr/sbin/smartctl", \
  58   PROGRAM!="/usr/bin/sh -c '/usr/sbin/smartctl -l scterc /dev/$parent | grep -q seconds && exit 0 || exit 1'", \
  59   RUN+="/usr/bin/sh -c '/usr/bin/echo 180 > /sys/block/$parent/device/timeout && /usr/bin/logger timeout for /dev/$parent set to 180 secs'"
  60
  61 LABEL="md_timeouts_end"