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feature request #21, now slam_tomb() tries to kill 3 times the pids holding the tomb, workflow:

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1- kill -SIGUSR1
2- if there are remaining pids, wait 3 secs to get harder
3- kill -SIGTERM
4- if there are remaining pids, wait 3 secs to kill 'em all
5- kill -SIGKILL
This commit is contained in:
Anathema 2011-08-16 02:52:01 +02:00
parent afd785be62
commit 20c1097281
1 changed files with 79 additions and 30 deletions
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65
src/tomb
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@ -757,16 +757,57 @@ exec_safe_post_hooks() {
fi fi
} }
kill_tomb() {
# $1 = pids to kill
# $2 = type of kill
for p in "$1"; do
func "killing PID $p..."
if [[ "$2" == "soft" ]]; then
kill -USR1 $p
elif [[ "$2" == "hard" ]]; then
kill -TERM $p
elif [[ "$2" == "must die" ]]; then
kill -9 $p
fi
done
}
slam_tomb() { slam_tomb() {
# $1 = tomb mount point # $1 = tomb mount point
local pidk p local pidk
pidk=`lsof -t "$1"` pidk=`lsof -t "$1"`
if [[ ! -z "$pidk" ]]; then if [[ ! -z "$pidk" ]]; then
for p in "$pidk"; do kill_tomb "$pidk" "soft"
func "killing PID $p..." else
kill -9 $p return 0
done
fi fi
# if there are remaining pids
# we need to play hard
pidk=`lsof -t "$1"`
if [[ -z "$pidk" ]]; then
return 0
fi
sleep 3
kill_tomb "$pidk" "hard"
pidk=`lsof -t "$1"`
if [[ -z "$pidk" ]]; then
return 0
fi
# if there are still some pids around
# we have to kill 'em all
sleep 3
kill_tomb "$pidk" "must die"
pidk=`lsof -t "$1"`
if [[ -z "$pidk" ]]; then
return 0
fi
# what PITA!
return 1
} }
umount_tomb() { umount_tomb() {
@ -777,10 +818,10 @@ umount_tomb() {
if ! [ $1 ]; then if ! [ $1 ]; then
tombs=`find /dev/mapper -name 'tomb.*'` tombs=`find /dev/mapper -name 'tomb.*'`
how_many_tombs=`wc -w <<< "$tombs"` how_many_tombs=`wc -w <<< "$tombs"`
if [ "$how_many_tombs" = "0" ]; then if [[ "$how_many_tombs" == "0" ]]; then
error "There is no open tomb to be closed" error "There is no open tomb to be closed"
return 1 return 1
elif [ "$how_many_tombs" = "1" ]; then elif [[ "$how_many_tombs" == "1" ]]; then
#mapper=`find /dev/mapper -name 'tomb.*'` #mapper=`find /dev/mapper -name 'tomb.*'`
func "closing mapper $tombs" func "closing mapper $tombs"
umount_tomb ${tombs} umount_tomb ${tombs}
@ -844,6 +885,10 @@ umount_tomb() {
notice "Slamming tomb $tombname mounted on $tombmount" notice "Slamming tomb $tombname mounted on $tombmount"
act "Kill all processes busy inside the tomb" act "Kill all processes busy inside the tomb"
slam_tomb "$tombmount" slam_tomb "$tombmount"
if [[ $? == 1 ]]; then
error "Cannot slam the tomb $tombname"
return 1
fi
else else
notice "Closing tomb $tombname mounted on $tombmount" notice "Closing tomb $tombname mounted on $tombmount"
fi fi
@ -855,10 +900,14 @@ umount_tomb() {
hook="`basename $b`" hook="`basename $b`"
act "closing tomb hook: $hook" act "closing tomb hook: $hook"
umount $b umount $b
if ! [ $? = 0 ]; then if [[ $? != 0 ]]; then
if [ $SLAM ]; then if [ $SLAM ]; then
notice "Slamming tomb: killing all processes using this hook" notice "Slamming tomb: killing all processes using this hook"
slam_tomb "$b" slam_tomb "$b"
if [[ $? == 1 ]]; then
error "Cannot slam the tomb $b"
return 1
fi
umount $b umount $b
else else
error "Tomb hook is busy, cannot close tomb." error "Tomb hook is busy, cannot close tomb."