Sysctl test will fail in some items if the value of /proc/sys/kernel
/sysctrl_writes_strict is 0 as the default value in kernel older than v4.5.
Make this test more robus and compatible with older kernel by checking and
update writes_strict value and restore it when test is done.
Signed-off-by: Orson Zhai <orson.zhai@xxxxxxxxxx>
Reviewed-by: Sumit Semwal <sumit.semwal@xxxxxxxxxx>
Tested-by: Sumit Semwal <sumit.semwal@xxxxxxxxxx>
---
tools/testing/selftests/sysctl/common_tests | 22 ++++++++++++++++++++++
tools/testing/selftests/sysctl/run_numerictests | 2 +-
tools/testing/selftests/sysctl/run_stringtests | 2 +-
3 files changed, 24 insertions(+), 2 deletions(-)
diff --git a/tools/testing/selftests/sysctl/common_tests b/tools/testing/selftests/sysctl/common_tests
index 17d534b1b7b4..b6862322962f 100644
--- a/tools/testing/selftests/sysctl/common_tests
+++ b/tools/testing/selftests/sysctl/common_tests
@@ -24,6 +24,14 @@ verify()
return 0
}
+exit_test()
+{
+ if [ ! -z ${old_strict} ]; then
+ echo ${old_strict} > ${WRITES_STRICT}
+ fi
+ exit $rc
+}
+
trap 'set_orig; rm -f "${TEST_FILE}"' EXIT
rc=0
@@ -63,6 +71,20 @@ else
echo "ok"
fi
+echo -n "Checking write strict setting ... "
+WRITES_STRICT="${SYSCTL}/kernel/sysctl_writes_strict"
+if [ ! -e ${WRITES_STRICT} ]; then
+ echo "FAIL, but skip in case of old kernel" >&2
+else
+ old_strict=$(cat ${WRITES_STRICT})
+ if [ "$old_strict" = "1" ]; then
+ echo "ok"
+ else
+ echo "FAIL, strict value is 0 but force to 1 to continue" >&2
+ echo "1" > ${WRITES_STRICT}
+ fi
+fi
+
# Now that we've validated the sanity of "set_test" and "set_orig",
# we can use those functions to set starting states before running
# specific behavioral tests.
diff --git a/tools/testing/selftests/sysctl/run_numerictests b/tools/testing/selftests/sysctl/run_numerictests
index 8510f93f2d14..e6e76c93d948 100755
--- a/tools/testing/selftests/sysctl/run_numerictests
+++ b/tools/testing/selftests/sysctl/run_numerictests
@@ -7,4 +7,4 @@ TEST_STR=$(( $ORIG + 1 ))
. ./common_tests
-exit $rc
+exit_test
diff --git a/tools/testing/selftests/sysctl/run_stringtests b/tools/testing/selftests/sysctl/run_stringtests
index 90a9293d520c..857ec667fb02 100755
--- a/tools/testing/selftests/sysctl/run_stringtests
+++ b/tools/testing/selftests/sysctl/run_stringtests
@@ -74,4 +74,4 @@ else
echo "ok"
fi
-exit $rc
+exit_test
--
2.12.2
--
To unsubscribe from this list: send the line "unsubscribe linux-kselftest" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
