selftests: add tests for efivarfs (455ce1c7) · Commits · e / devices / android_kernel_sony_msm8994

tools/testing/selftests/Makefile

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		TARGETS = breakpoints kcmp mqueue vm cpu-hotplug memory-hotplug
		TARGETS = breakpoints kcmp mqueue vm cpu-hotplug memory-hotplug efivarfs

		all:
		for TARGET in $(TARGETS); do \

tools/testing/selftests/efivarfs/Makefile

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		CC = $(CROSS_COMPILE)gcc
		CFLAGS = -Wall

		test_objs = open-unlink

		all: $(test_objs)

		run_tests: all
		@/bin/bash ./efivarfs.sh \|\| echo "efivarfs selftests: [FAIL]"

		clean:
		rm -f $(test_objs)

tools/testing/selftests/efivarfs/efivarfs.sh

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		#!/bin/bash

		efivarfs_mount=/sys/firmware/efi/efivars
		test_guid=210be57c-9849-4fc7-a635-e6382d1aec27

		check_prereqs()
		{
		local msg="skip all tests:"

		if [ $UID != 0 ]; then
		echo $msg must be run as root >&2
		exit 0
		fi

		if ! grep -q "^\S\+ $efivarfs_mount efivarfs" /proc/mounts; then
		echo $msg efivarfs is not mounted on $efivarfs_mount >&2
		exit 0
		fi
		}

		run_test()
		{
		local test="$1"

		echo "--------------------"
		echo "running $test"
		echo "--------------------"

		if [ "$(type -t $test)" = 'function' ]; then
		( $test )
		else
		( ./$test )
		fi

		if [ $? -ne 0 ]; then
		echo " [FAIL]"
		rc=1
		else
		echo " [PASS]"
		fi
		}

		test_create()
		{
		local attrs='\x07\x00\x00\x00'
		local file=$efivarfs_mount/$FUNCNAME-$test_guid

		printf "$attrs\x00" > $file

		if [ ! -e $file ]; then
		echo "$file couldn't be created" >&2
		exit 1
		fi

		if [ $(stat -c %s $file) -ne 5 ]; then
		echo "$file has invalid size" >&2
		exit 1
		fi
		}

		test_delete()
		{
		local attrs='\x07\x00\x00\x00'
		local file=$efivarfs_mount/$FUNCNAME-$test_guid

		printf "$attrs\x00" > $file

		if [ ! -e $file ]; then
		echo "$file couldn't be created" >&2
		exit 1
		fi

		rm $file

		if [ -e $file ]; then
		echo "$file couldn't be deleted" >&2
		exit 1
		fi

		}

		# test that we can remove a variable by issuing a write with only
		# attributes specified
		test_zero_size_delete()
		{
		local attrs='\x07\x00\x00\x00'
		local file=$efivarfs_mount/$FUNCNAME-$test_guid

		printf "$attrs\x00" > $file

		if [ ! -e $file ]; then
		echo "$file does not exist" >&2
		exit 1
		fi

		printf "$attrs" > $file

		if [ -e $file ]; then
		echo "$file should have been deleted" >&2
		exit 1
		fi
		}

		test_open_unlink()
		{
		local file=$efivarfs_mount/$FUNCNAME-$test_guid
		./open-unlink $file
		}

		check_prereqs

		rc=0

		run_test test_create
		run_test test_delete
		run_test test_zero_size_delete
		run_test test_open_unlink

		exit $rc

tools/testing/selftests/efivarfs/open-unlink.c

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		#include <stdio.h>
		#include <stdint.h>
		#include <stdlib.h>
		#include <unistd.h>
		#include <sys/types.h>
		#include <sys/stat.h>
		#include <fcntl.h>

		int main(int argc, char **argv)
		{
		const char *path;
		char buf[5];
		int fd, rc;

		if (argc < 2) {
		fprintf(stderr, "usage: %s <path>\n", argv[0]);
		return EXIT_FAILURE;
		}

		path = argv[1];

		/* attributes: EFI_VARIABLE_NON_VOLATILE \|
		* EFI_VARIABLE_BOOTSERVICE_ACCESS \|
		* EFI_VARIABLE_RUNTIME_ACCESS
		*/
		(uint32_t )buf = 0x7;
		buf[4] = 0;

		/* create a test variable */
		fd = open(path, O_WRONLY \| O_CREAT);
		if (fd < 0) {
		perror("open(O_WRONLY)");
		return EXIT_FAILURE;
		}

		rc = write(fd, buf, sizeof(buf));
		if (rc != sizeof(buf)) {
		perror("write");
		return EXIT_FAILURE;
		}

		close(fd);

		fd = open(path, O_RDONLY);
		if (fd < 0) {
		perror("open");
		return EXIT_FAILURE;
		}

		if (unlink(path) < 0) {
		perror("unlink");
		return EXIT_FAILURE;
		}

		rc = read(fd, buf, sizeof(buf));
		if (rc > 0) {
		fprintf(stderr, "reading from an unlinked variable "
		"shouldn't be possible\n");
		return EXIT_FAILURE;
		}

		return EXIT_SUCCESS;
		}