Fix swraid device detection on boot.

svn path=/nixos/trunk/; revision=21661
This commit is contained in:
Nicolas Pierron 2010-05-08 17:18:16 +00:00
parent c1f7622512
commit 43fcf8a2b2

View File

@ -5,6 +5,7 @@
let
tempConf = "/var/run/mdadm.conf";
tempStatus = "/var/run/mdadm.status";
logFile = "/var/log/mdadmEvents.log";
modprobe = config.system.sbin.modprobe;
inherit (pkgs) mdadm diffutils;
@ -36,22 +37,43 @@ in
${modprobe}/sbin/modprobe $mod || true
done
# Save previous probe
mv ${tempConf} ${tempConf}.old
# Wait until we can fetch the status of mdadm devices.
while ! test -e /proc/mdstat; do
sleep 10
done
# Scan /proc/partitions for RAID devices.
${mdadm}/sbin/mdadm --examine --brief --scan -c partitions > ${tempConf}
if ! ${diffutils}/bin/diff ${tempConf} ${tempConf}.old > /dev/null; then
# Activate each device found.
${mdadm}/sbin/mdadm --assemble -c ${tempConf} --scan
# If the status has changed.
if ! ${diffutils}/bin/diff -q /proc/mdstat ${tempStatus} > /dev/null; then
# Send notifications.
initctl emit -n new-devices
# Keep the previous status to watch changes.
cp ${tempStatus} ${tempStatus}.old
try=0
# Loop until the status change.
while ${diffutils}/bin/diff -q ${tempStatus} ${tempStatus}.old > /dev/null; do
test "$try" -gt 12 && break
test "$try" -ne 0 && sleep 10
# Activate each device found.
${mdadm}/sbin/mdadm --assemble -c ${tempConf} --scan
# Register the new status
cp /proc/mdstat ${tempStatus}
try=$(($try + 1))
done
if test "$try" -le 6; then
# Send notifications.
initctl emit -n new-devices
fi
# Remove previous status.
rm ${tempStatus}.old
fi
# Remove previous configuration.
rm ${tempConf}.old
'';
task = true;
@ -64,6 +86,7 @@ in
postStart = ''
echo > ${tempConf}
echo > ${tempStatus}
# Assemble early raid devices.
initctl emit -n new-raid-array