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linux
selftests: add tests for efivarfs
This change adds a few initial efivarfs tests to the
tools/testing/selftests directory.
The open-unlink test is based on code from Lingzhu Xiang.
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Cc: Matt Fleming <matt.fleming@intel.com>
Cc: Lingzhu Xiang <lxiang@redhat.com>
Cc: Dave Young <dyoung@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
authored by
Jeremy Kerr
and committed by
Linus Torvalds
455ce1c7
dfe2a77f
+195
-1
+1
-1
tools/testing/selftests/Makefile
+1
-1
tools/testing/selftests/Makefile
+12
tools/testing/selftests/efivarfs/Makefile
+12
tools/testing/selftests/efivarfs/Makefile
+119
tools/testing/selftests/efivarfs/efivarfs.sh
+119
tools/testing/selftests/efivarfs/efivarfs.sh
···
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#!/bin/bash
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efivarfs_mount=/sys/firmware/efi/efivars
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test_guid=210be57c-9849-4fc7-a635-e6382d1aec27
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check_prereqs()
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{
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local msg="skip all tests:"
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if [ $UID != 0 ]; then
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echo $msg must be run as root >&2
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exit 0
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fi
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if ! grep -q "^\S\+ $efivarfs_mount efivarfs" /proc/mounts; then
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echo $msg efivarfs is not mounted on $efivarfs_mount >&2
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exit 0
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fi
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}
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run_test()
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{
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local test="$1"
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echo "--------------------"
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echo "running $test"
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echo "--------------------"
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if [ "$(type -t $test)" = 'function' ]; then
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( $test )
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else
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( ./$test )
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fi
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if [ $? -ne 0 ]; then
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echo " [FAIL]"
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rc=1
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else
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echo " [PASS]"
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fi
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}
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test_create()
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{
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local attrs='\x07\x00\x00\x00'
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local file=$efivarfs_mount/$FUNCNAME-$test_guid
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printf "$attrs\x00" > $file
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if [ ! -e $file ]; then
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echo "$file couldn't be created" >&2
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exit 1
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fi
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if [ $(stat -c %s $file) -ne 5 ]; then
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echo "$file has invalid size" >&2
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exit 1
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fi
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}
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test_delete()
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{
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local attrs='\x07\x00\x00\x00'
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local file=$efivarfs_mount/$FUNCNAME-$test_guid
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printf "$attrs\x00" > $file
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if [ ! -e $file ]; then
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echo "$file couldn't be created" >&2
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exit 1
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fi
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rm $file
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if [ -e $file ]; then
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echo "$file couldn't be deleted" >&2
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exit 1
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fi
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}
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# test that we can remove a variable by issuing a write with only
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# attributes specified
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test_zero_size_delete()
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{
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local attrs='\x07\x00\x00\x00'
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local file=$efivarfs_mount/$FUNCNAME-$test_guid
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printf "$attrs\x00" > $file
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if [ ! -e $file ]; then
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echo "$file does not exist" >&2
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exit 1
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fi
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printf "$attrs" > $file
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if [ -e $file ]; then
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echo "$file should have been deleted" >&2
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exit 1
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fi
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}
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test_open_unlink()
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{
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local file=$efivarfs_mount/$FUNCNAME-$test_guid
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./open-unlink $file
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}
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check_prereqs
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rc=0
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run_test test_create
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run_test test_delete
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run_test test_zero_size_delete
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run_test test_open_unlink
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exit $rc
+63
tools/testing/selftests/efivarfs/open-unlink.c
+63
tools/testing/selftests/efivarfs/open-unlink.c
···
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#include <stdio.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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int main(int argc, char **argv)
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{
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const char *path;
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char buf[5];
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int fd, rc;
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if (argc < 2) {
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fprintf(stderr, "usage: %s <path>\n", argv[0]);
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return EXIT_FAILURE;
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}
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path = argv[1];
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/* attributes: EFI_VARIABLE_NON_VOLATILE |
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* EFI_VARIABLE_BOOTSERVICE_ACCESS |
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* EFI_VARIABLE_RUNTIME_ACCESS
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*/
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*(uint32_t *)buf = 0x7;
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buf[4] = 0;
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/* create a test variable */
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fd = open(path, O_WRONLY | O_CREAT);
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if (fd < 0) {
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perror("open(O_WRONLY)");
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return EXIT_FAILURE;
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}
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rc = write(fd, buf, sizeof(buf));
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if (rc != sizeof(buf)) {
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perror("write");
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return EXIT_FAILURE;
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}
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close(fd);
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fd = open(path, O_RDONLY);
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if (fd < 0) {
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perror("open");
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return EXIT_FAILURE;
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}
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if (unlink(path) < 0) {
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perror("unlink");
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return EXIT_FAILURE;
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}
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rc = read(fd, buf, sizeof(buf));
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if (rc > 0) {
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fprintf(stderr, "reading from an unlinked variable "
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"shouldn't be possible\n");
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return EXIT_FAILURE;
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}
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return EXIT_SUCCESS;
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}