The patch titled
Subject: lib/test_sysctl: support testing of sysctl. boot parameter
has been added to the -mm tree. Its filename is
lib-test_sysctl-support-testing-of-sysctl-boot-parameter.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/lib-test_sysctl-support-testing-of-sysctl-boot-parameter.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/lib-test_sysctl-support-testing-of-sysctl-boot-parameter.patch
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------------------------------------------------------
From: Vlastimil Babka <vbabka@xxxxxxx>
Subject: lib/test_sysctl: support testing of sysctl. boot parameter
Testing is done by a new parameter debug.test_sysctl.boot_int which
defaults to 0 and it's expected that the tester passes a boot parameter
that sets it to 1. The test checks if it's set to 1. To distinguish true
failure from parameter not being set, the test checks /proc/cmdline for
the expected parameter, and whether test_sysctl is built-in and not a
module.
Link: http://lkml.kernel.org/r/20200427180433.7029-6-vbabka@xxxxxxx
Signed-off-by: Vlastimil Babka <vbabka@xxxxxxx>
Cc: Alexey Dobriyan <adobriyan@xxxxxxxxx>
Cc: Christian Brauner <christian.brauner@xxxxxxxxxx>
Cc: David Rientjes <rientjes@xxxxxxxxxx>
Cc: "Eric W . Biederman" <ebiederm@xxxxxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Cc: "Guilherme G . Piccoli" <gpiccoli@xxxxxxxxxxxxx>
Cc: Iurii Zaikin <yzaikin@xxxxxxxxxx>
Cc: Ivan Teterevkov <ivan.teterevkov@xxxxxxxxxxx>
Cc: Kees Cook <keescook@xxxxxxxxxxxx>
Cc: Luis Chamberlain <mcgrof@xxxxxxxxxx>
Cc: Masami Hiramatsu <mhiramat@xxxxxxxxxx>
Cc: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
lib/test_sysctl.c | 13 +++++++
tools/testing/selftests/sysctl/sysctl.sh | 36 +++++++++++++++++++++
2 files changed, 49 insertions(+)
--- a/lib/test_sysctl.c~lib-test_sysctl-support-testing-of-sysctl-boot-parameter
+++ a/lib/test_sysctl.c
@@ -44,6 +44,8 @@ struct test_sysctl_data {
int int_0002;
int int_0003[4];
+ int boot_int;
+
unsigned int uint_0001;
char string_0001[65];
@@ -61,6 +63,8 @@ static struct test_sysctl_data test_data
.int_0003[2] = 2,
.int_0003[3] = 3,
+ .boot_int = 0,
+
.uint_0001 = 314,
.string_0001 = "(none)",
@@ -92,6 +96,15 @@ static struct ctl_table test_table[] = {
.proc_handler = proc_dointvec,
},
{
+ .procname = "boot_int",
+ .data = &test_data.boot_int,
+ .maxlen = sizeof(test_data.boot_int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec,
+ .extra1 = SYSCTL_ZERO,
+ .extra2 = SYSCTL_ONE,
+ },
+ {
.procname = "uint_0001",
.data = &test_data.uint_0001,
.maxlen = sizeof(unsigned int),
--- a/tools/testing/selftests/sysctl/sysctl.sh~lib-test_sysctl-support-testing-of-sysctl-boot-parameter
+++ a/tools/testing/selftests/sysctl/sysctl.sh
@@ -39,6 +39,7 @@ ALL_TESTS="$ALL_TESTS 0003:1:1:int_0002"
ALL_TESTS="$ALL_TESTS 0004:1:1:uint_0001"
ALL_TESTS="$ALL_TESTS 0005:3:1:int_0003"
ALL_TESTS="$ALL_TESTS 0006:50:1:bitmap_0001"
+ALL_TESTS="$ALL_TESTS 0007:1:1:boot_int"
test_modprobe()
{
@@ -752,6 +753,40 @@ sysctl_test_0006()
run_bitmaptest
}
+sysctl_test_0007()
+{
+ TARGET="${SYSCTL}/boot_int"
+ if [ -d $DIR ]; then
+ echo "Boot param test only possible sysctl_test is built-in, not module:"
+ cat $TEST_DIR/config >&2
+ return 0
+ fi
+
+ echo -n "Testing if $TARGET is set to 1 ..."
+ ORIG=$(cat "${TARGET}")
+
+ if [ x$ORIG = "x1" ]; then
+ echo "ok"
+ return 0
+ fi
+ echo "FAIL"
+ echo "Checking if /proc/cmdline contains setting of the expected parameter ..."
+ if [ ! -f /proc/cmdline ]; then
+ echo "/proc/cmdline does not exist, test inconclusive"
+ return 0
+ fi
+
+ FOUND=$(grep -c "sysctl[./]debug[./]test_sysctl[./]boot_int=1" /proc/cmdline)
+ if [ $FOUND = "1" ]; then
+ echo "Kernel param found but $TARGET is not 1, TEST FAILED"
+ rc=1
+ test_rc
+ fi
+
+ echo "Skipping test, expected kernel parameter missing."
+ echo "To perform this test, make sure kernel is booted with parameter: sysctl.debug.test_sysctl.boot_int=1"
+}
+
list_tests()
{
echo "Test ID list:"
@@ -766,6 +801,7 @@ list_tests()
echo "0004 x $(get_test_count 0004) - tests proc_douintvec()"
echo "0005 x $(get_test_count 0005) - tests proc_douintvec() array"
echo "0006 x $(get_test_count 0006) - tests proc_do_large_bitmap()"
+ echo "0007 x $(get_test_count 0007) - tests setting sysctl from kernel boot param"
}
usage()
_
Patches currently in -mm which might be from vbabka@xxxxxxx are
usercopy-mark-dma-kmalloc-caches-as-usercopy-caches.patch
mm-dump_page-do-not-crash-with-invalid-mapping-pointer.patch
kernel-sysctl-support-setting-sysctl-parameters-from-kernel-command-line.patch
kernel-sysctl-support-handling-command-line-aliases.patch
kernel-hung_task-convert-hung_task_panic-boot-parameter-to-sysctl.patch
tools-testing-selftests-sysctl-sysctlsh-support-config_test_sysctl=y.patch
lib-test_sysctl-support-testing-of-sysctl-boot-parameter.patch
