From 43fe0cc46b6206b25f0f13bb249f0078441ae15a Mon Sep 17 00:00:00 2001
From: Gautam <gautammenghani201@gmail.com>
Date: Sun, 26 Jun 2022 01:22:45 +0530
Subject: [PATCH] kselftests/damon: add support for cases where debugfs cannot
be read
The kernel is in lockdown mode when secureboot is enabled and hence
debugfs cannot be used. Add support for this and other general cases
where debugfs cannot be read and communicate the same to the user before
running tests.
Signed-off-by: Gautam <gautammenghani201@gmail.com>
Reviewed-by: SeongJae Park <sj@kernel.org>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
---
tools/testing/selftests/damon/_chk_dependency.sh | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/tools/testing/selftests/damon/_chk_dependency.sh b/tools/testing/selftests/damon/_chk_dependency.sh
index 0189db81550be..0328ac0b5a5ed 100644
--- a/tools/testing/selftests/damon/_chk_dependency.sh
+++ b/tools/testing/selftests/damon/_chk_dependency.sh
@@ -26,3 +26,13 @@ do
exit 1
fi
done
+
+permission_error="Operation not permitted"
+for f in attrs target_ids monitor_on
+do
+ status=$( cat "$DBGFS/$f" 2>&1 )
+ if [ "${status#*$permission_error}" != "$status" ]; then
+ echo "Permission for reading $DBGFS/$f denied; maybe secureboot enabled?"
+ exit $ksft_skip
+ fi
+done
--
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