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theYinYeti

Need help with Mandriva shutdown [solved]

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I have a critical bug: https://qa.mandriva.com/show_bug.cgi?id=54143

Using Mandriva 2010.0.

 

To try and work around the problem for now, I created a LVM umount script:

#!/bin/bash
#
# chkconfig: 12345 99 70
# description: Unmount LVM partitions before it hangs the PC.

### BEGIN INIT INFO
# Provides: safe-lvm-umount
# Default-Start: 12345 1 2 3 4 5
# Default-Stop: 06 0 6
# Short-Description: Unmount LVM partitions before it hangs the PC.
### END INIT INFO

# Source function library
. /etc/rc.d/init.d/functions

function countLVM() {
mount | grep /dev/mapper/ | wc -l
}

if [[ $(countLVM) -gt 0 ]]; then
case "$1" in
	stop)
		LVMmounts="$(mount | sed -nr 's#/dev/mapper/.* on (.*) type .*#\1#p')"
		{ \
			echo "$LVMmounts"
			mount \
			| grep -Ef <(sed 's#^.*$# on \0/.+ type #' <<<"$LVMmounts") \
			| sed -nr 's#.* on (.*) type .*#\1#p'
		} \
		| sort -ru \
		| while read mountpoint; do
			action "Unmounting $mountpoint..." umount "$mountpoint"
		done
		gprintf "Unmounting LVM partitions..."
		RETVAL=$(countLVM)
		[ $RETVAL -eq 0 ] && success || failure
		echo
		;;
	*)
		gprintf "Usage: %s stop\n" "$0"
		;;
esac
else
{
	echo "No LVM partition mounted:"
	mount
} | sed 's/^/safe_lvm_umount... /'
fi

exit ${RETVAL:-0}

First two comments:

— The strange “12345†runlevel in Default-Start is a probably useless bug work-around I picked from popfile, in hope it would help, but it doesn't change anything. Same for Default-Stop.

— The whole “else {…} | sed …†block was added to still get something on screen even if no LVM partitions are mounted. I don't need it but I try to debug my problem…

 

I enabled my script as needed:

[yves@sedentaire ~]$ find /etc/rc.d -name "*safe-lvm-umount" | xargs ls -1
/etc/rc.d/init.d/safe-lvm-umount
/etc/rc.d/rc0.d/K70safe-lvm-umount
/etc/rc.d/rc1.d/S99safe-lvm-umount
/etc/rc.d/rc2.d/S99safe-lvm-umount
/etc/rc.d/rc3.d/S99safe-lvm-umount
/etc/rc.d/rc4.d/S99safe-lvm-umount
/etc/rc.d/rc5.d/S99safe-lvm-umount
/etc/rc.d/rc6.d/K70safe-lvm-umount
/etc/rc.d/rc7.d/K70safe-lvm-umount

 

And yet… whatever I do, my script is NEVER called on shutdown! I always get this:

[EDIT: I removed the screenshot; here's the relevant part:]
Unmounting file systems: umount2: Device or resource busy
umount: /ici: device is busy.
       (In some cases useful info about processes that use
        the device is found by lsof(8) or fuser(1))
umount2: Device or resource busy                              [FAILED]
[/EDIT]

 

What should I do to make sure the script is run? The script is good because the PC doesn't hang if I run it before calling shutdown.

 

Yves.

Edited by theYinYeti

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Is this script enabled using the chkconfig command?

 

chkconfig --add safe-lvm-umount

 

for example? You can check:

 

chkconfig --list | grep -i lvm

 

to see if it appears. Only thing I can think of right now.

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This is a little beyond my ken, but what if you use the script to initiate the shutdown? Just put the shutdown command at the end of the script. Offhand I don't know what the shutdown command is, but you could probably find it.

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I want to integrate as much as possible with Mandriva's scripts, because I don't want to create a custom launcher for each and every desktop/panel combination that I, or my wife, or my son, use… That's why I try the rc.d route.

 

My script is indeed enabled using chkconfig --add.

 

Yves.

 

Edit: it is enabled, since I see the “Usage: safe-lvm-umount stop†message in boot logs.

Edited by theYinYeti

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I managed to solve my issue by reverting the way the script works (invert start and stop).

 

So the script is now:

#!/bin/bash
#
# chkconfig: 067 00 99
# description: Unmount LVM partitions before it hangs the PC.

### BEGIN INIT INFO
# Provides: safe-lvm-umount
# Default-Start: 067 0 6 7
# Short-Description: Unmount LVM partitions before it hangs the PC.
### END INIT INFO

# Source function library
. /etc/rc.d/init.d/functions

function countLVM() {
mount | grep /dev/mapper/ | wc -l
}

if [[ $(countLVM) -gt 0 ]]; then
case "$1" in
	start)
		LVMmounts="$(mount | sed -nr 's#/dev/mapper/.* on (.*) type .*#\1#p')"
		{ \
			echo "$LVMmounts"
			mount \
			| grep -Ef <(sed 's#^.*$# on \0/.+ type #' <<<"$LVMmounts") \
			| sed -nr 's#.* on (.*) type .*#\1#p'
		} \
		| sort -ru \
		| while read mountpoint; do
			action "Unmounting $mountpoint..." umount "$mountpoint"
		done
		gprintf "Unmounting LVM partitions..."
		RETVAL=$(countLVM)
		[ $RETVAL -eq 0 ] && success || failure
		echo
		;;
	*)
		gprintf "Usage: %s start\n" "$0"
		;;
esac
fi

exit ${RETVAL:-0}

 

And accordingly:

[yves@sedentaire ~]$ find /etc/rc.d -name "*safe-lvm-umount" | xargs ls -1
/etc/rc.d/init.d/safe-lvm-umount
/etc/rc.d/rc0.d/S00safe-lvm-umount
/etc/rc.d/rc1.d/K99safe-lvm-umount
/etc/rc.d/rc2.d/K99safe-lvm-umount
/etc/rc.d/rc3.d/K99safe-lvm-umount
/etc/rc.d/rc4.d/K99safe-lvm-umount
/etc/rc.d/rc5.d/K99safe-lvm-umount
/etc/rc.d/rc6.d/S00safe-lvm-umount
/etc/rc.d/rc7.d/S00safe-lvm-umount

 

Side-note: for some reason, “chkconfig --add safe-lvm-umount†made the link in rc3.d/ a S00 instead of a K99, and I had to correct it by hand…

Now it works as intended. Still, I wish I understood why the former method did not!

 

Yves.

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