linux-kselftest-next-6.5-rc1

This kselftest update for Linux 6.5-rc1 consists of:
 
 - change to allow runners to override the timeout
   This change is made to avoid future increases of long
   timeouts
 - several other spelling and cleanups
 - a new subtest to video_device_test
 - enhancements to test coverage in clone3 test
 - other fixes to ftrace and cpufreq tests
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Merge tag 'linux-kselftest-next-6.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest

Pull kselftest updates from Shuah Khan:

 - allow runners to override the timeout

   This change is made to avoid future increases of long timeouts

 - several other spelling and cleanups

 - a new subtest to video_device_test

 - enhancements to test coverage in clone3 test

 - other fixes to ftrace and cpufreq tests

* tag 'linux-kselftest-next-6.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest:
  selftests/ftace: Fix KTAP output ordering
  selftests/cpufreq: Don't enable generic lock debugging options
  kselftests: Sort the collections list to avoid duplicate tests
  selftest: pidfd: Omit long and repeating outputs
  selftests: allow runners to override the timeout
  selftests/ftrace: Add new test case which checks for optimized probes
  selftests/clone3: test clone3 with exit signal in flags
  kselftest: vDSO: Fix accumulation of uninitialized ret when CLOCK_REALTIME is undefined
  selftests: prctl: Fix spelling mistake "anonynous" -> "anonymous"
  selftests: media_tests: Add new subtest to video_device_test

Documentation/dev-tools/kselftest.rst

@@ -168,6 +168,28 @@ the `-t` option for specific single tests. Either can be used multiple times::
 
 For other features see the script usage output, seen with the `-h` option.
 
+Timeout for selftests
+=====================
+
+Selftests are designed to be quick and so a default timeout is used of 45
+seconds for each test. Tests can override the default timeout by adding
+a settings file in their directory and set a timeout variable there to the
+configured a desired upper timeout for the test. Only a few tests override
+the timeout with a value higher than 45 seconds, selftests strives to keep
+it that way. Timeouts in selftests are not considered fatal because the
+system under which a test runs may change and this can also modify the
+expected time it takes to run a test. If you have control over the systems
+which will run the tests you can configure a test runner on those systems to
+use a greater or lower timeout on the command line as with the `-o` or
+the `--override-timeout` argument. For example to use 165 seconds instead
+one would use:
+
+   $ ./run_kselftest.sh --override-timeout 165
+
+You can look at the TAP output to see if you ran into the timeout. Test
+runners which know a test must run under a specific time can then optionally
+treat these timeouts then as fatal.
+
 Packaging selftests
 ===================
 

tools/testing/selftests/clone3/clone3.c

@@ -129,7 +129,7 @@ int main(int argc, char *argv[])
 	uid_t uid = getuid();
 
 	ksft_print_header();
-	ksft_set_plan(18);
+	ksft_set_plan(19);
 	test_clone3_supported();
 
 	/* Just a simple clone3() should return 0.*/
@@ -198,5 +198,8 @@ int main(int argc, char *argv[])
 	/* Do a clone3() in a new time namespace */
 	test_clone3(CLONE_NEWTIME, 0, 0, CLONE3_ARGS_NO_TEST);
 
+	/* Do a clone3() with exit signal (SIGCHLD) in flags */
+	test_clone3(SIGCHLD, 0, -EINVAL, CLONE3_ARGS_NO_TEST);
+
 	ksft_finished();
 }

tools/testing/selftests/cpufreq/config

@@ -5,11 +5,3 @@ CONFIG_CPU_FREQ_GOV_USERSPACE=y
 CONFIG_CPU_FREQ_GOV_ONDEMAND=y
 CONFIG_CPU_FREQ_GOV_CONSERVATIVE=y
 CONFIG_CPU_FREQ_GOV_SCHEDUTIL=y
-CONFIG_DEBUG_RT_MUTEXES=y
-CONFIG_DEBUG_PLIST=y
-CONFIG_DEBUG_SPINLOCK=y
-CONFIG_DEBUG_MUTEXES=y
-CONFIG_DEBUG_LOCK_ALLOC=y
-CONFIG_PROVE_LOCKING=y
-CONFIG_LOCKDEP=y
-CONFIG_DEBUG_ATOMIC_SLEEP=y

tools/testing/selftests/ftrace/ftracetest

@@ -301,7 +301,7 @@ ktaptest() { # result comment
     comment="# $comment"
   fi
 
-  echo $CASENO $result $INSTANCE$CASENAME $comment
+  echo $result $CASENO $INSTANCE$CASENAME $comment
 }
 
 eval_result() { # sigval

tools/testing/selftests/ftrace/test.d/kprobe/kprobe_opt_types.tc

@@ -0,0 +1,34 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0-or-later
+# Copyright (C) 2023 Akanksha J N, IBM corporation
+# description: Register/unregister optimized probe
+# requires: kprobe_events
+
+case `uname -m` in
+x86_64)
+;;
+arm*)
+;;
+ppc*)
+;;
+*)
+  echo "Please implement other architecture here"
+  exit_unsupported
+esac
+
+DEFAULT=$(cat /proc/sys/debug/kprobes-optimization)
+echo 1 > /proc/sys/debug/kprobes-optimization
+for i in `seq 0 255`; do
+        echo  "p:testprobe $FUNCTION_FORK+${i}" > kprobe_events || continue
+        echo 1 > events/kprobes/enable || continue
+        (echo "forked")
+	PROBE=$(grep $FUNCTION_FORK /sys/kernel/debug/kprobes/list)
+        echo 0 > events/kprobes/enable
+        echo > kprobe_events
+	if echo $PROBE | grep -q OPTIMIZED; then
+                echo "$DEFAULT" >  /proc/sys/debug/kprobes-optimization
+                exit_pass
+        fi
+done
+echo "$DEFAULT" >  /proc/sys/debug/kprobes-optimization
+exit_unresolved

tools/testing/selftests/kselftest/runner.sh

@@ -8,7 +8,8 @@ export logfile=/dev/stdout
 export per_test_logging=
 
 # Defaults for "settings" file fields:
-# "timeout" how many seconds to let each test run before failing.
+# "timeout" how many seconds to let each test run before running
+# over our soft timeout limit.
 export kselftest_default_timeout=45
 
 # There isn't a shell-agnostic way to find the path of a sourced file,
@@ -90,6 +91,14 @@ run_one()
 		done < "$settings"
 	fi
 
+	# Command line timeout overrides the settings file
+	if [ -n "$kselftest_override_timeout" ]; then
+		kselftest_timeout="$kselftest_override_timeout"
+		echo "# overriding timeout to $kselftest_timeout" >> "$logfile"
+	else
+		echo "# timeout set to $kselftest_timeout" >> "$logfile"
+	fi
+
 	TEST_HDR_MSG="selftests: $DIR: $BASENAME_TEST"
 	echo "# $TEST_HDR_MSG"
 	if [ ! -e "$TEST" ]; then

tools/testing/selftests/media_tests/video_device_test.c

@@ -37,45 +37,58 @@
 #include <time.h>
 #include <linux/videodev2.h>
 
-int main(int argc, char **argv)
+#define PRIORITY_MAX 4
+
+int priority_test(int fd)
+{
+	/* This test will try to update the priority associated with a file descriptor */
+
+	enum v4l2_priority old_priority, new_priority, priority_to_compare;
+	int ret;
+	int result = 0;
+
+	ret = ioctl(fd, VIDIOC_G_PRIORITY, &old_priority);
+	if (ret < 0) {
+		printf("Failed to get priority: %s\n", strerror(errno));
+		return -1;
+	}
+	new_priority = (old_priority + 1) % PRIORITY_MAX;
+	ret = ioctl(fd, VIDIOC_S_PRIORITY, &new_priority);
+	if (ret < 0) {
+		printf("Failed to set priority: %s\n", strerror(errno));
+		return -1;
+	}
+	ret = ioctl(fd, VIDIOC_G_PRIORITY, &priority_to_compare);
+	if (ret < 0) {
+		printf("Failed to get new priority: %s\n", strerror(errno));
+		result = -1;
+		goto cleanup;
+	}
+	if (priority_to_compare != new_priority) {
+		printf("Priority wasn't set - test failed\n");
+		result = -1;
+	}
+
+cleanup:
+	ret = ioctl(fd, VIDIOC_S_PRIORITY, &old_priority);
+	if (ret < 0) {
+		printf("Failed to restore priority: %s\n", strerror(errno));
+		return -1;
+	}
+	return result;
+}
+
+int loop_test(int fd)
 {
-	int opt;
-	char video_dev[256];
 	int count;
 	struct v4l2_tuner vtuner;
 	struct v4l2_capability vcap;
 	int ret;
-	int fd;
-
-	if (argc < 2) {
-		printf("Usage: %s [-d </dev/videoX>]\n", argv[0]);
-		exit(-1);
-	}
-
-	/* Process arguments */
-	while ((opt = getopt(argc, argv, "d:")) != -1) {
-		switch (opt) {
-		case 'd':
-			strncpy(video_dev, optarg, sizeof(video_dev) - 1);
-			video_dev[sizeof(video_dev)-1] = '\0';
-			break;
-		default:
-			printf("Usage: %s [-d </dev/videoX>]\n", argv[0]);
-			exit(-1);
-		}
-	}
 
 	/* Generate random number of interations */
 	srand((unsigned int) time(NULL));
 	count = rand();
 
-	/* Open Video device and keep it open */
-	fd = open(video_dev, O_RDWR);
-	if (fd == -1) {
-		printf("Video Device open errno %s\n", strerror(errno));
-		exit(-1);
-	}
-
 	printf("\nNote:\n"
 	       "While test is running, remove the device or unbind\n"
 	       "driver and ensure there are no use after free errors\n"
@@ -98,4 +111,46 @@ int main(int argc, char **argv)
 		sleep(10);
 		count--;
 	}
+	return 0;
+}
+
+int main(int argc, char **argv)
+{
+	int opt;
+	char video_dev[256];
+	int fd;
+	int test_result;
+
+	if (argc < 2) {
+		printf("Usage: %s [-d </dev/videoX>]\n", argv[0]);
+		exit(-1);
+	}
+
+	/* Process arguments */
+	while ((opt = getopt(argc, argv, "d:")) != -1) {
+		switch (opt) {
+		case 'd':
+			strncpy(video_dev, optarg, sizeof(video_dev) - 1);
+			video_dev[sizeof(video_dev)-1] = '\0';
+			break;
+		default:
+			printf("Usage: %s [-d </dev/videoX>]\n", argv[0]);
+			exit(-1);
+		}
+	}
+
+	/* Open Video device and keep it open */
+	fd = open(video_dev, O_RDWR);
+	if (fd == -1) {
+		printf("Video Device open errno %s\n", strerror(errno));
+		exit(-1);
+	}
+
+	test_result = priority_test(fd);
+	if (!test_result)
+		printf("Priority test - PASSED\n");
+	else
+		printf("Priority test - FAILED\n");
+
+	loop_test(fd);
 }

tools/testing/selftests/pidfd/pidfd.h

@@ -90,7 +90,6 @@ again:
 	}
 
 	ret = WEXITSTATUS(status);
-	ksft_print_msg("waitpid WEXITSTATUS=%d\n", ret);
 	return ret;
 }
 

tools/testing/selftests/pidfd/pidfd_fdinfo_test.c

@@ -143,6 +143,7 @@ static inline int child_join(struct child *child, struct error *err)
 		r = -1;
 	}
 
+	ksft_print_msg("waitpid WEXITSTATUS=%d\n", r);
 	return r;
 }
 

tools/testing/selftests/pidfd/pidfd_test.c

@@ -115,7 +115,8 @@ static int test_pidfd_send_signal_exited_fail(void)
 
 	pidfd = open(buf, O_DIRECTORY | O_CLOEXEC);
 
-	(void)wait_for_pid(pid);
+	ret = wait_for_pid(pid);
+	ksft_print_msg("waitpid WEXITSTATUS=%d\n", ret);
 
 	if (pidfd < 0)
 		ksft_exit_fail_msg(

tools/testing/selftests/prctl/set-anon-vma-name-test.c

@@ -97,7 +97,7 @@ TEST_F(vma, renaming) {
 	TH_LOG("Try to pass invalid name (with non-printable character \\1) to rename the VMA");
 	EXPECT_EQ(rename_vma((unsigned long)self->ptr_anon, AREA_SIZE, BAD_NAME), -EINVAL);
 
-	TH_LOG("Try to rename non-anonynous VMA");
+	TH_LOG("Try to rename non-anonymous VMA");
 	EXPECT_EQ(rename_vma((unsigned long) self->ptr_not_anon, AREA_SIZE, GOOD_NAME), -EINVAL);
 }
 

tools/testing/selftests/run_kselftest.sh

@@ -26,6 +26,7 @@ Usage: $0 [OPTIONS]
   -l | --list			List the available collection:test entries
   -d | --dry-run		Don't actually run any tests
   -h | --help			Show this usage info
+  -o | --override-timeout	Number of seconds after which we timeout
 EOF
 	exit $1
 }
@@ -33,6 +34,7 @@ EOF
 COLLECTIONS=""
 TESTS=""
 dryrun=""
+kselftest_override_timeout=""
 while true; do
 	case "$1" in
 		-s | --summary)
@@ -51,6 +53,9 @@ while true; do
 		-d | --dry-run)
 			dryrun="echo"
 			shift ;;
+		-o | --override-timeout)
+			kselftest_override_timeout="$2"
+			shift 2 ;;
 		-h | --help)
 			usage 0 ;;
 		"")
@@ -85,7 +90,7 @@ if [ -n "$TESTS" ]; then
 	available="$(echo "$valid" | sed -e 's/ /\n/g')"
 fi
 
-collections=$(echo "$available" | cut -d: -f1 | uniq)
+collections=$(echo "$available" | cut -d: -f1 | sort | uniq)
 for collection in $collections ; do
 	[ -w /dev/kmsg ] && echo "kselftest: Running tests in $collection" >> /dev/kmsg
 	tests=$(echo "$available" | grep "^$collection:" | cut -d: -f2)

tools/testing/selftests/vDSO/vdso_test_clock_getres.c

@@ -84,12 +84,12 @@ static inline int vdso_test_clock(unsigned int clock_id)
 
 int main(int argc, char **argv)
 {
-	int ret;
+	int ret = 0;
 
 #if _POSIX_TIMERS > 0
 
 #ifdef CLOCK_REALTIME
-	ret = vdso_test_clock(CLOCK_REALTIME);
+	ret += vdso_test_clock(CLOCK_REALTIME);
 #endif
 
 #ifdef CLOCK_BOOTTIME