linux-kselftest-4.6-rc1

This update for Kselftest adds:
 
 - A new feature to create test-specific kconfig fragments.
   This feature helps configure Kselftests to test specific
   Kernel Configuration options as opposed to defconfig.
 
 - A new test for Media Controller API
 
 - A few fixes
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Merge tag 'linux-kselftest-4.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest

Pull Kselftest updates from Shuah Khan:
 "This update for Kselftest adds:

   - A new feature to create test-specific kconfig fragments.  This
     feature helps configure Kselftests to test specific Kernel
     Configuration options as opposed to defconfig.

   - A new test for Media Controller API

   - A few fixes"

* tag 'linux-kselftest-4.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest:
  selftests: media_dcevice_test fix usage information
  selftests: media_dcevice_test fix to handle ioctl failure case
  selftests: add missing .gitignore file or entry
  Makefile: add kselftest-merge
  selftests: create test-specific kconfig fragments
  selftests: breakpoint: add step_after_suspend_test
  selftests: add a new test for Media Controller API

Makefile

@@ -1087,6 +1087,14 @@ kselftest:
 kselftest-clean:
 	$(Q)$(MAKE) -C tools/testing/selftests clean
 
+PHONY += kselftest-merge
+kselftest-merge:
+	$(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!))
+	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \
+		-m $(objtree)/.config \
+		$(srctree)/tools/testing/selftests/*/config
+	+$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
+
 # ---------------------------------------------------------------------------
 # Modules
 
@@ -1295,6 +1303,8 @@ help:
 	@echo  '                    Build, install, and boot kernel before'
 	@echo  '                    running kselftest on it'
 	@echo  '  kselftest-clean - Remove all generated kselftest files'
+	@echo  '  kselftest-merge - Merge all the config dependencies of kselftest to existed'
+	@echo  '                    .config.'
 	@echo  ''
 	@echo  'Kernel packaging:'
 	@$(MAKE) $(build)=$(package-dir) help

tools/testing/selftests/breakpoints/.gitignore

@@ -1 +1,2 @@
 breakpoint_test
+step_after_suspend_test

tools/testing/selftests/breakpoints/Makefile

@@ -6,9 +6,11 @@ ifeq ($(ARCH),x86)
 TEST_PROGS := breakpoint_test
 endif
 
+TEST_PROGS += step_after_suspend_test
+
 all: $(TEST_PROGS)
 
 include ../lib.mk
 
 clean:
-	rm -fr breakpoint_test
+	rm -fr breakpoint_test step_after_suspend_test

tools/testing/selftests/breakpoints/step_after_suspend_test.c

@@ -0,0 +1,218 @@
+/*
+ * Copyright (C) 2016 Google, Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#define _GNU_SOURCE
+
+#include <errno.h>
+#include <fcntl.h>
+#include <sched.h>
+#include <signal.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/ptrace.h>
+#include <sys/stat.h>
+#include <sys/timerfd.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+
+#include "../kselftest.h"
+
+void child(int cpu)
+{
+	cpu_set_t set;
+
+	CPU_ZERO(&set);
+	CPU_SET(cpu, &set);
+	if (sched_setaffinity(0, sizeof(set), &set) != 0) {
+		perror("sched_setaffinity() failed");
+		_exit(1);
+	}
+
+	if (ptrace(PTRACE_TRACEME, 0, NULL, NULL) != 0) {
+		perror("ptrace(PTRACE_TRACEME) failed");
+		_exit(1);
+	}
+
+	if (raise(SIGSTOP) != 0) {
+		perror("raise(SIGSTOP) failed");
+		_exit(1);
+	}
+
+	_exit(0);
+}
+
+bool run_test(int cpu)
+{
+	int status;
+	pid_t pid = fork();
+	pid_t wpid;
+
+	if (pid < 0) {
+		perror("fork() failed");
+		return false;
+	}
+	if (pid == 0)
+		child(cpu);
+
+	wpid = waitpid(pid, &status, __WALL);
+	if (wpid != pid) {
+		perror("waitpid() failed");
+		return false;
+	}
+	if (!WIFSTOPPED(status)) {
+		printf("child did not stop\n");
+		return false;
+	}
+	if (WSTOPSIG(status) != SIGSTOP) {
+		printf("child did not stop with SIGSTOP\n");
+		return false;
+	}
+
+	if (ptrace(PTRACE_SINGLESTEP, pid, NULL, NULL) < 0) {
+		if (errno == EIO) {
+			printf("ptrace(PTRACE_SINGLESTEP) not supported on this architecture\n");
+			ksft_exit_skip();
+		}
+		perror("ptrace(PTRACE_SINGLESTEP) failed");
+		return false;
+	}
+
+	wpid = waitpid(pid, &status, __WALL);
+	if (wpid != pid) {
+		perror("waitpid() failed");
+		return false;
+	}
+	if (WIFEXITED(status)) {
+		printf("child did not single-step\n");
+		return false;
+	}
+	if (!WIFSTOPPED(status)) {
+		printf("child did not stop\n");
+		return false;
+	}
+	if (WSTOPSIG(status) != SIGTRAP) {
+		printf("child did not stop with SIGTRAP\n");
+		return false;
+	}
+
+	if (ptrace(PTRACE_CONT, pid, NULL, NULL) < 0) {
+		perror("ptrace(PTRACE_CONT) failed");
+		return false;
+	}
+
+	wpid = waitpid(pid, &status, __WALL);
+	if (wpid != pid) {
+		perror("waitpid() failed");
+		return false;
+	}
+	if (!WIFEXITED(status)) {
+		printf("child did not exit after PTRACE_CONT\n");
+		return false;
+	}
+
+	return true;
+}
+
+void suspend(void)
+{
+	int power_state_fd;
+	struct sigevent event = {};
+	int timerfd;
+	int err;
+	struct itimerspec spec = {};
+
+	power_state_fd = open("/sys/power/state", O_RDWR);
+	if (power_state_fd < 0) {
+		perror("open(\"/sys/power/state\") failed (is this test running as root?)");
+		ksft_exit_fail();
+	}
+
+	timerfd = timerfd_create(CLOCK_BOOTTIME_ALARM, 0);
+	if (timerfd < 0) {
+		perror("timerfd_create() failed");
+		ksft_exit_fail();
+	}
+
+	spec.it_value.tv_sec = 5;
+	err = timerfd_settime(timerfd, 0, &spec, NULL);
+	if (err < 0) {
+		perror("timerfd_settime() failed");
+		ksft_exit_fail();
+	}
+
+	if (write(power_state_fd, "mem", strlen("mem")) != strlen("mem")) {
+		perror("entering suspend failed");
+		ksft_exit_fail();
+	}
+
+	close(timerfd);
+	close(power_state_fd);
+}
+
+int main(int argc, char **argv)
+{
+	int opt;
+	bool do_suspend = true;
+	bool succeeded = true;
+	cpu_set_t available_cpus;
+	int err;
+	int cpu;
+
+	while ((opt = getopt(argc, argv, "n")) != -1) {
+		switch (opt) {
+		case 'n':
+			do_suspend = false;
+			break;
+		default:
+			printf("Usage: %s [-n]\n", argv[0]);
+			printf("        -n: do not trigger a suspend/resume cycle before the test\n");
+			return -1;
+		}
+	}
+
+	if (do_suspend)
+		suspend();
+
+	err = sched_getaffinity(0, sizeof(available_cpus), &available_cpus);
+	if (err < 0) {
+		perror("sched_getaffinity() failed");
+		ksft_exit_fail();
+	}
+
+	for (cpu = 0; cpu < CPU_SETSIZE; cpu++) {
+		bool test_success;
+
+		if (!CPU_ISSET(cpu, &available_cpus))
+			continue;
+
+		test_success = run_test(cpu);
+		printf("CPU %d: ", cpu);
+		if (test_success) {
+			printf("[OK]\n");
+			ksft_inc_pass_cnt();
+		} else {
+			printf("[FAILED]\n");
+			ksft_inc_fail_cnt();
+			succeeded = false;
+		}
+	}
+
+	ksft_print_cnts();
+	if (succeeded)
+		ksft_exit_pass();
+	else
+		ksft_exit_fail();
+}

tools/testing/selftests/cpu-hotplug/config

@@ -0,0 +1,2 @@
+CONFIG_NOTIFIER_ERROR_INJECTION=y
+CONFIG_CPU_NOTIFIER_ERROR_INJECT=m

tools/testing/selftests/firmware/config

@@ -0,0 +1 @@
+CONFIG_TEST_FIRMWARE=y

tools/testing/selftests/ftrace/config

@@ -0,0 +1 @@
+CONFIG_FTRACE=y

tools/testing/selftests/ipc/.gitignore

@@ -0,0 +1 @@
+msgque_test

tools/testing/selftests/ipc/config

@@ -0,0 +1,2 @@
+CONFIG_EXPERT=y
+CONFIG_CHECKPOINT_RESTORE=y

tools/testing/selftests/media_tests/.gitignore

@@ -0,0 +1 @@
+media_device_test

tools/testing/selftests/media_tests/Makefile

@@ -0,0 +1,7 @@
+TEST_PROGS := media_device_test
+all: $(TEST_PROGS)
+
+include ../lib.mk
+
+clean:
+	rm -fr media_device_test

tools/testing/selftests/media_tests/media_device_test.c

@@ -0,0 +1,95 @@
+/*
+ * media_devkref_test.c - Media Controller Device Kref API Test
+ *
+ * Copyright (c) 2016 Shuah Khan <shuahkh@osg.samsung.com>
+ * Copyright (c) 2016 Samsung Electronics Co., Ltd.
+ *
+ * This file is released under the GPLv2.
+ */
+
+/*
+ * This file adds a test for Media Controller API.
+ * This test should be run as root and should not be
+ * included in the Kselftest run. This test should be
+ * run when hardware and driver that makes use Media
+ * Controller API are present in the system.
+ *
+ * This test opens user specified Media Device and calls
+ * MEDIA_IOC_DEVICE_INFO ioctl in a loop once every 10
+ * seconds.
+ *
+ * Usage:
+ *	sudo ./media_device_test -d /dev/mediaX
+ *
+ *	While test is running, remove the device and
+ *	ensure there are no use after free errors and
+ *	other Oops in the dmesg. Enable KaSan kernel
+ *	config option for use-after-free error detection.
+*/
+
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <string.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include <sys/stat.h>
+#include <linux/media.h>
+
+int main(int argc, char **argv)
+{
+	int opt;
+	char media_device[256];
+	int count = 0;
+	struct media_device_info mdi;
+	int ret;
+	int fd;
+
+	if (argc < 2) {
+		printf("Usage: %s [-d </dev/mediaX>]\n", argv[0]);
+		exit(-1);
+	}
+
+	/* Process arguments */
+	while ((opt = getopt(argc, argv, "d:")) != -1) {
+		switch (opt) {
+		case 'd':
+			strncpy(media_device, optarg, sizeof(media_device) - 1);
+			media_device[sizeof(media_device)-1] = '\0';
+			break;
+		default:
+			printf("Usage: %s [-d </dev/mediaX>]\n", argv[0]);
+			exit(-1);
+		}
+	}
+
+	if (getuid() != 0) {
+		printf("Please run the test as root - Exiting.\n");
+		exit(-1);
+	}
+
+	/* Open Media device and keep it open */
+	fd = open(media_device, O_RDWR);
+	if (fd == -1) {
+		printf("Media Device open errno %s\n", strerror(errno));
+		exit(-1);
+	}
+
+	printf("\nNote:\n"
+	       "While test is running, remove the device and\n"
+	       "ensure there are no use after free errors and\n"
+	       "other Oops in the dmesg. Enable KaSan kernel\n"
+	       "config option for use-after-free error detection.\n\n");
+
+	while (count < 100) {
+		ret = ioctl(fd, MEDIA_IOC_DEVICE_INFO, &mdi);
+		if (ret < 0)
+			printf("Media Device Info errno %s\n", strerror(errno));
+		else
+			printf("Media device model %s driver %s\n",
+				mdi.model, mdi.driver);
+		sleep(10);
+		count++;
+	}
+}

tools/testing/selftests/memory-hotplug/config

@@ -0,0 +1,4 @@
+CONFIG_MEMORY_HOTPLUG=y
+CONFIG_MEMORY_HOTPLUG_SPARSE=y
+CONFIG_NOTIFIER_ERROR_INJECTION=y
+CONFIG_MEMORY_NOTIFIER_ERROR_INJECT=m

tools/testing/selftests/mount/config

@@ -0,0 +1,2 @@
+CONFIG_USER_NS=y
+CONFIG_DEVPTS_MULTIPLE_INSTANCES=y

tools/testing/selftests/net/config

@@ -0,0 +1,3 @@
+CONFIG_USER_NS=y
+CONFIG_BPF_SYSCALL=y
+CONFIG_TEST_BPF=m

tools/testing/selftests/pstore/config

@@ -0,0 +1,4 @@
+CONFIG_MISC_FILESYSTEMS=y
+CONFIG_PSTORE=y
+CONFIG_PSTORE_PMSG=y
+CONFIG_PSTORE_CONSOLE=y

tools/testing/selftests/seccomp/config

@@ -0,0 +1,2 @@
+CONFIG_SECCOMP=y
+CONFIG_SECCOMP_FILTER=y

tools/testing/selftests/static_keys/config

@@ -0,0 +1 @@
+CONFIG_TEST_STATIC_KEYS=m

tools/testing/selftests/user/config

@@ -0,0 +1 @@
+CONFIG_TEST_USER_COPY=m

tools/testing/selftests/vm/config

@@ -0,0 +1 @@
+CONFIG_USERFAULTFD=y

tools/testing/selftests/zram/config

@@ -0,0 +1,2 @@
+CONFIG_ZSMALLOC=y
+CONFIG_ZRAM=m