[PATCH 04/10] btrfs: add helper to kill background process running _btrfs_stress_scrub

fdmanana
2024-03-27T17:11:58Z

From: Filipe Manana <fdmanana@suse.com>

Killing a background process running _btrfs_stress_scrub() is not as
simple as sending a signal to the process and waiting for it to die.
Therefore we have the following logic to terminate such process:

kill $pid
wait $pid
while ps aux | grep "scrub start" | grep -qv grep; do
sleep 1
done

Since this is repeated in several test cases, move this logic to a common
helper and use it in all affected test cases. This will help to avoid
repeating the same code again several times in upcoming changes.

Signed-off-by: Filipe Manana <fdmanana@suse.com>
---
common/btrfs | 14 ++++++++++++++
tests/btrfs/061 | 7 +------
tests/btrfs/066 | 8 ++------
tests/btrfs/069 | 11 +++++------
tests/btrfs/072 | 11 +++++------
tests/btrfs/073 | 11 +++++------
6 files changed, 32 insertions(+), 30 deletions(-)

diff --git a/common/btrfs b/common/btrfs
index e95cff7f..d0adeea1 100644
--- a/common/btrfs
+++ b/common/btrfs
@@ -349,6 +349,20 @@ _btrfs_stress_scrub()
done
}

+# Kill a background process running _btrfs_stress_scrub()
+_btrfs_kill_stress_scrub_pid()
+{
+ local scrub_pid=$1
+
+ # Ignore if process already died.
+ kill $scrub_pid &> /dev/null
+ wait $scrub_pid &> /dev/null
+ # Wait for the scrub operation to finish.
+ while ps aux | grep "scrub start" | grep -qv grep; do
+ sleep 1
+ done
+}
+
# stress btrfs by defragmenting every file/dir in a loop and compress file
# contents while defragmenting if second argument is not "nocompress"
_btrfs_stress_defrag()
diff --git a/tests/btrfs/061 b/tests/btrfs/061
index d0b55e48..b8b2706c 100755
--- a/tests/btrfs/061
+++ b/tests/btrfs/061
@@ -52,12 +52,7 @@ run_test()
echo "Wait for fsstress to exit and kill all background workers" >>$seqres.full
wait $fsstress_pid
_btrfs_kill_stress_balance_pid $balance_pid
- kill $scrub_pid
- wait $scrub_pid
- # wait for the crub operation to finish
- while ps aux | grep "scrub start" | grep -qv grep; do
- sleep 1
- done
+ _btrfs_kill_stress_scrub_pid $scrub_pid

echo "Scrub the filesystem" >>$seqres.full
$BTRFS_UTIL_PROG scrub start -B $SCRATCH_MNT >>$seqres.full 2>&1
diff --git a/tests/btrfs/066 b/tests/btrfs/066
index a29034bb..29821fdd 100755
--- a/tests/btrfs/066
+++ b/tests/btrfs/066
@@ -57,12 +57,8 @@ run_test()
wait $fsstress_pid

touch $stop_file
- kill $scrub_pid
- wait
- # wait for the scrub operation to finish
- while ps aux | grep "scrub start" | grep -qv grep; do
- sleep 1
- done
+ wait $subvol_pid
+ _btrfs_kill_stress_scrub_pid $scrub_pid

echo "Scrub the filesystem" >>$seqres.full
$BTRFS_UTIL_PROG scrub start -B $SCRATCH_MNT >>$seqres.full 2>&1
diff --git a/tests/btrfs/069 b/tests/btrfs/069
index 139dde48..20f44b39 100755
--- a/tests/btrfs/069
+++ b/tests/btrfs/069
@@ -59,17 +59,16 @@ run_test()

echo "Wait for fsstress to exit and kill all background workers" >>$seqres.full
wait $fsstress_pid
- kill $replace_pid $scrub_pid
- wait
+ kill $replace_pid
+ wait $replace_pid

- # wait for the scrub and replace operations to finish
- while ps aux | grep "scrub start" | grep -qv grep; do
- sleep 1
- done
+ # wait for the replace operation to finish
while ps aux | grep "replace start" | grep -qv grep; do
sleep 1
done

+ _btrfs_kill_stress_scrub_pid $scrub_pid
+
echo "Scrub the filesystem" >>$seqres.full
$BTRFS_UTIL_PROG scrub start -B $SCRATCH_MNT >>$seqres.full 2>&1
if [ $? -ne 0 ]; then
diff --git a/tests/btrfs/072 b/tests/btrfs/072
index 4b6b6fb5..6c15b51f 100755
--- a/tests/btrfs/072
+++ b/tests/btrfs/072
@@ -52,16 +52,15 @@ run_test()

echo "Wait for fsstress to exit and kill all background workers" >>$seqres.full
wait $fsstress_pid
- kill $scrub_pid $defrag_pid
- wait
- # wait for the scrub and defrag operations to finish
- while ps aux | grep "scrub start" | grep -qv grep; do
- sleep 1
- done
+ kill $defrag_pid
+ wait $defrag_pid
+ # wait for the defrag operation to finish
while ps aux | grep "btrfs filesystem defrag" | grep -qv grep; do
sleep 1
done

+ _btrfs_kill_stress_scrub_pid $scrub_pid
+
echo "Scrub the filesystem" >>$seqres.full
$BTRFS_UTIL_PROG scrub start -B $SCRATCH_MNT >>$seqres.full 2>&1
if [ $? -ne 0 ]; then
diff --git a/tests/btrfs/073 b/tests/btrfs/073
index b1604f94..49a4abd1 100755
--- a/tests/btrfs/073
+++ b/tests/btrfs/073
@@ -51,16 +51,15 @@ run_test()

echo "Wait for fsstress to exit and kill all background workers" >>$seqres.full
wait $fsstress_pid
- kill $scrub_pid $remount_pid
- wait
- # wait for the scrub and remount operations to finish
- while ps aux | grep "scrub start" | grep -qv grep; do
- sleep 1
- done
+ kill $remount_pid
+ wait $remount_pid
+ # wait for the remount operation to finish
while ps aux | grep "mount.*$SCRATCH_MNT" | grep -qv grep; do
sleep 1
done

+ _btrfs_kill_stress_scrub_pid $scrub_pid
+
echo "Scrub the filesystem" >>$seqres.full
$BTRFS_UTIL_PROG scrub start -B $SCRATCH_MNT >>$seqres.full 2>&1
if [ $? -ne 0 ]; then
--
2.43.0