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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!="/bin/sh -c '/usr/sbin/smartctl -l scterc /dev/$parent | grep -q seconds && exit 0 || exit 1'", \
59 RUN+="/bin/sh -c 'echo 180 > /sys/block/$parent/device/timeout && /usr/bin/logger timeout for /dev/$parent set to 180 secs'"
60
61 LABEL="md_timeouts_end"