[PATCH 01/10] btrfs: add helper to kill background process running _btrfs_stress_balance

fdmanana
2024-03-27T17:11:55Z

From: Filipe Manana <fdmanana@suse.com>

Killing a background process running _btrfs_stress_balance() 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
# Wait for the balance operation to finish.
while ps aux | grep "balance 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/060 | 8 ++------
tests/btrfs/061 | 10 ++++------
tests/btrfs/062 | 10 ++++------
tests/btrfs/063 | 10 ++++------
tests/btrfs/064 | 10 ++++------
tests/btrfs/255 | 8 ++------
7 files changed, 34 insertions(+), 36 deletions(-)

diff --git a/common/btrfs b/common/btrfs
index aa344706..e95cff7f 100644
--- a/common/btrfs
+++ b/common/btrfs
@@ -308,6 +308,20 @@ _btrfs_stress_balance()
done
}

+# Kill a background process running _btrfs_stress_balance()
+_btrfs_kill_stress_balance_pid()
+{
+ local balance_pid=$1
+
+ # Ignore if process already died.
+ kill $balance_pid &> /dev/null
+ wait $balance_pid &> /dev/null
+ # Wait for the balance operation to finish.
+ while ps aux | grep "balance start" | grep -qv grep; do
+ sleep 1
+ done
+}
+
# stress btrfs by creating/mounting/umounting/deleting subvolume in a loop
_btrfs_stress_subvolume()
{
diff --git a/tests/btrfs/060 b/tests/btrfs/060
index a0184891..58167cc6 100755
--- a/tests/btrfs/060
+++ b/tests/btrfs/060
@@ -57,12 +57,8 @@ run_test()
wait $fsstress_pid

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

echo "Scrub the filesystem" >>$seqres.full
$BTRFS_UTIL_PROG scrub start -B $SCRATCH_MNT >>$seqres.full 2>&1
diff --git a/tests/btrfs/061 b/tests/btrfs/061
index c1010413..d0b55e48 100755
--- a/tests/btrfs/061
+++ b/tests/btrfs/061
@@ -51,12 +51,10 @@ run_test()

echo "Wait for fsstress to exit and kill all background workers" >>$seqres.full
wait $fsstress_pid
- kill $balance_pid $scrub_pid
- wait
- # wait for the balance and scrub operations to finish
- while ps aux | grep "balance start" | grep -qv grep; do
- sleep 1
- done
+ _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
diff --git a/tests/btrfs/062 b/tests/btrfs/062
index 818a0156..a2639d6c 100755
--- a/tests/btrfs/062
+++ b/tests/btrfs/062
@@ -52,12 +52,10 @@ run_test()

echo "Wait for fsstress to exit and kill all background workers" >>$seqres.full
wait $fsstress_pid
- kill $balance_pid $defrag_pid
- wait
- # wait for the balance and defrag operations to finish
- while ps aux | grep "balance start" | grep -qv grep; do
- sleep 1
- done
+ _btrfs_kill_stress_balance_pid $balance_pid
+ 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
diff --git a/tests/btrfs/063 b/tests/btrfs/063
index 2f771baf..baf0c356 100755
--- a/tests/btrfs/063
+++ b/tests/btrfs/063
@@ -51,12 +51,10 @@ run_test()

echo "Wait for fsstress to exit and kill all background workers" >>$seqres.full
wait $fsstress_pid
- kill $balance_pid $remount_pid
- wait
- # wait for the balance and remount loop to finish
- while ps aux | grep "balance start" | grep -qv grep; do
- sleep 1
- done
+ _btrfs_kill_stress_balance_pid $balance_pid
+ kill $remount_pid
+ wait $remount_pid
+ # wait for the remount loop to finish
while ps aux | grep "mount.*$SCRATCH_MNT" | grep -qv grep; do
sleep 1
done
diff --git a/tests/btrfs/064 b/tests/btrfs/064
index e9b46ce6..58b53afe 100755
--- a/tests/btrfs/064
+++ b/tests/btrfs/064
@@ -63,12 +63,10 @@ run_test()

echo "Wait for fsstress to exit and kill all background workers" >>$seqres.full
wait $fsstress_pid
- kill $balance_pid $replace_pid
- wait
- # wait for the balance and replace operations to finish
- while ps aux | grep "balance start" | grep -qv grep; do
- sleep 1
- done
+ _btrfs_kill_stress_balance_pid $balance_pid
+ kill $replace_pid
+ wait $replace_pid
+ # wait for the replace operation to finish
while ps aux | grep "replace start" | grep -qv grep; do
sleep 1
done
diff --git a/tests/btrfs/255 b/tests/btrfs/255
index 7e70944a..aa250467 100755
--- a/tests/btrfs/255
+++ b/tests/btrfs/255
@@ -41,12 +41,8 @@ for ((i = 0; i < 20; i++)); do
$BTRFS_UTIL_PROG quota enable $SCRATCH_MNT
$BTRFS_UTIL_PROG quota disable $SCRATCH_MNT
done
-kill $balance_pid &> /dev/null
-wait
-# wait for the balance operation to finish
-while ps aux | grep "balance start" | grep -qv grep; do
- sleep 1
-done
+
+_btrfs_kill_stress_balance_pid $balance_pid

echo "Silence is golden"
status=0
--
2.43.0