linux-kernel - [PATCH 6/9] selftets/damon: prepare for monitor

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Date: Mon, 29 Jan 2024 17:35:45 -0800
From: SeongJae Park <sj@...nel.org>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: SeongJae Park <sj@...nel.org>,
	Shuah Khan <shuah@...nel.org>,
	damon@...ts.linux.dev,
	linux-mm@...ck.org,
	linux-kselftest@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 6/9] selftets/damon: prepare for monitor_on file renaming

Following change will rename 'monitor_on' DAMON debugfs file to
'monitor_on_DEPRECATED', to make the deprecation unignorable in runtime.
Since it could make DAMON selftests fail and disturb future bisects,
update DAMON selftests to support the change.

Signed-off-by: SeongJae Park <sj@...nel.org>
---
 tools/testing/selftests/damon/_chk_dependency.sh     | 11 +++++++++--
 tools/testing/selftests/damon/_debugfs_common.sh     |  7 +++++++
 .../testing/selftests/damon/debugfs_empty_targets.sh | 12 ++++++++++--
 3 files changed, 26 insertions(+), 4 deletions(-)

diff --git a/tools/testing/selftests/damon/_chk_dependency.sh b/tools/testing/selftests/damon/_chk_dependency.sh
index 0328ac0b5a5e..350f8c2b071d 100644
--- a/tools/testing/selftests/damon/_chk_dependency.sh
+++ b/tools/testing/selftests/damon/_chk_dependency.sh
@@ -18,7 +18,14 @@ then
 	exit $ksft_skip
 fi
 
-for f in attrs target_ids monitor_on
+if [ -f "$DBGFS/monitor_on_DEPRECATED" ]
+then
+	monitor_on_file="monitor_on_DEPRECATED"
+else
+	monitor_on_file="monitor_on"
+fi
+
+for f in attrs target_ids "$monitor_on_file"
 do
 	if [ ! -f "$DBGFS/$f" ]
 	then
@@ -28,7 +35,7 @@ do
 done
 
 permission_error="Operation not permitted"
-for f in attrs target_ids monitor_on
+for f in attrs target_ids "$monitor_on_file"
 do
 	status=$( cat "$DBGFS/$f" 2>&1 )
 	if [ "${status#*$permission_error}" != "$status" ]; then
diff --git a/tools/testing/selftests/damon/_debugfs_common.sh b/tools/testing/selftests/damon/_debugfs_common.sh
index 48989d4813ae..aa995516870b 100644
--- a/tools/testing/selftests/damon/_debugfs_common.sh
+++ b/tools/testing/selftests/damon/_debugfs_common.sh
@@ -45,6 +45,13 @@ test_content() {
 source ./_chk_dependency.sh
 
 damon_onoff="$DBGFS/monitor_on"
+if [ -f "$DBGFS/monitor_on_DEPRECATED" ]
+then
+	damon_onoff="$DBGFS/monitor_on_DEPRECATED"
+else
+	damon_onoff="$DBGFS/monitor_on"
+fi
+
 if [ $(cat "$damon_onoff") = "on" ]
 then
 	echo "monitoring is on"
diff --git a/tools/testing/selftests/damon/debugfs_empty_targets.sh b/tools/testing/selftests/damon/debugfs_empty_targets.sh
index 87aff8083822..effbea33dc16 100755
--- a/tools/testing/selftests/damon/debugfs_empty_targets.sh
+++ b/tools/testing/selftests/damon/debugfs_empty_targets.sh
@@ -8,6 +8,14 @@ source _debugfs_common.sh
 
 orig_target_ids=$(cat "$DBGFS/target_ids")
 echo "" > "$DBGFS/target_ids"
-orig_monitor_on=$(cat "$DBGFS/monitor_on")
-test_write_fail "$DBGFS/monitor_on" "on" "orig_monitor_on" "empty target ids"
+
+if [ -f "$DBGFS/monitor_on_DEPRECATED" ]
+then
+	monitor_on_file="$DBGFS/monitor_on_DEPRECATED"
+else
+	monitor_on_file="$DBGFS/monitor_on"
+fi
+
+orig_monitor_on=$(cat "$monitor_on_file")
+test_write_fail "$monitor_on_file" "on" "orig_monitor_on" "empty target ids"
 echo "$orig_target_ids" > "$DBGFS/target_ids"
-- 
2.39.2