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-rw-r--r--tools/testing/selftests/efivarfs/.gitignore3
-rw-r--r--tools/testing/selftests/efivarfs/Makefile8
-rw-r--r--tools/testing/selftests/efivarfs/config1
-rw-r--r--tools/testing/selftests/efivarfs/create-read.c41
-rwxr-xr-xtools/testing/selftests/efivarfs/efivarfs.sh218
-rw-r--r--tools/testing/selftests/efivarfs/open-unlink.c134
6 files changed, 405 insertions, 0 deletions
diff --git a/tools/testing/selftests/efivarfs/.gitignore b/tools/testing/selftests/efivarfs/.gitignore
new file mode 100644
index 0000000000..807407f7f5
--- /dev/null
+++ b/tools/testing/selftests/efivarfs/.gitignore
@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-only
+create-read
+open-unlink
diff --git a/tools/testing/selftests/efivarfs/Makefile b/tools/testing/selftests/efivarfs/Makefile
new file mode 100644
index 0000000000..e3181338ba
--- /dev/null
+++ b/tools/testing/selftests/efivarfs/Makefile
@@ -0,0 +1,8 @@
+# SPDX-License-Identifier: GPL-2.0-only
+CFLAGS = -Wall
+
+TEST_GEN_FILES := open-unlink create-read
+TEST_PROGS := efivarfs.sh
+
+include ../lib.mk
+
diff --git a/tools/testing/selftests/efivarfs/config b/tools/testing/selftests/efivarfs/config
new file mode 100644
index 0000000000..4e151f1005
--- /dev/null
+++ b/tools/testing/selftests/efivarfs/config
@@ -0,0 +1 @@
+CONFIG_EFIVAR_FS=y
diff --git a/tools/testing/selftests/efivarfs/create-read.c b/tools/testing/selftests/efivarfs/create-read.c
new file mode 100644
index 0000000000..7bc7af4eb2
--- /dev/null
+++ b/tools/testing/selftests/efivarfs/create-read.c
@@ -0,0 +1,41 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <string.h>
+
+int main(int argc, char **argv)
+{
+ const char *path;
+ char buf[4];
+ int fd, rc;
+
+ if (argc < 2) {
+ fprintf(stderr, "usage: %s <path>\n", argv[0]);
+ return EXIT_FAILURE;
+ }
+
+ path = argv[1];
+
+ /* create a test variable */
+ fd = open(path, O_RDWR | O_CREAT, 0600);
+ if (fd < 0) {
+ perror("open(O_WRONLY)");
+ return EXIT_FAILURE;
+ }
+
+ rc = read(fd, buf, sizeof(buf));
+ if (rc != 0) {
+ fprintf(stderr, "Reading a new var should return EOF\n");
+ close(fd);
+ return EXIT_FAILURE;
+ }
+
+ close(fd);
+ return EXIT_SUCCESS;
+}
diff --git a/tools/testing/selftests/efivarfs/efivarfs.sh b/tools/testing/selftests/efivarfs/efivarfs.sh
new file mode 100755
index 0000000000..d374878cc0
--- /dev/null
+++ b/tools/testing/selftests/efivarfs/efivarfs.sh
@@ -0,0 +1,218 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+
+efivarfs_mount=/sys/firmware/efi/efivars
+test_guid=210be57c-9849-4fc7-a635-e6382d1aec27
+
+# Kselftest framework requirement - SKIP code is 4.
+ksft_skip=4
+
+file_cleanup()
+{
+ chattr -i $1
+ rm -f $1
+}
+
+check_prereqs()
+{
+ local msg="skip all tests:"
+
+ if [ $UID != 0 ]; then
+ echo $msg must be run as root >&2
+ exit $ksft_skip
+ fi
+
+ if ! grep -q "^\S\+ $efivarfs_mount efivarfs" /proc/mounts; then
+ echo $msg efivarfs is not mounted on $efivarfs_mount >&2
+ exit $ksft_skip
+ 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
+ file_cleanup $file
+ exit 1
+ fi
+ file_cleanup $file
+}
+
+test_create_empty()
+{
+ local file=$efivarfs_mount/$FUNCNAME-$test_guid
+
+ : > $file
+
+ if [ ! -e $file ]; then
+ echo "$file can not be created without writing" >&2
+ exit 1
+ fi
+ file_cleanup $file
+}
+
+test_create_read()
+{
+ local file=$efivarfs_mount/$FUNCNAME-$test_guid
+ ./create-read $file
+ if [ $? -ne 0 ]; then
+ echo "create and read $file failed"
+ file_cleanup $file
+ exit 1
+ fi
+ file_cleanup $file
+}
+
+test_delete()
+{
+ local attrs='\x07\x00\x00\x00'
+ local file=$efivarfs_mount/$FUNCNAME-$test_guid
+
+ printf "$attrs\x00" > $file
+
+ if [ ! -e $file ]; then
+ echo "$file couldn't be created" >&2
+ exit 1
+ fi
+
+ file_cleanup $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
+
+ chattr -i $file
+ printf "$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
+}
+
+# test that we can create a range of filenames
+test_valid_filenames()
+{
+ local attrs='\x07\x00\x00\x00'
+ local ret=0
+
+ local file_list="abc dump-type0-11-1-1362436005 1234 -"
+ for f in $file_list; do
+ local file=$efivarfs_mount/$f-$test_guid
+
+ printf "$attrs\x00" > $file
+
+ if [ ! -e $file ]; then
+ echo "$file could not be created" >&2
+ ret=1
+ else
+ file_cleanup $file
+ fi
+ done
+
+ exit $ret
+}
+
+test_invalid_filenames()
+{
+ local attrs='\x07\x00\x00\x00'
+ local ret=0
+
+ local file_list="
+ -1234-1234-1234-123456789abc
+ foo
+ foo-bar
+ -foo-
+ foo-barbazba-foob-foob-foob-foobarbazfoo
+ foo-------------------------------------
+ -12345678-1234-1234-1234-123456789abc
+ a-12345678=1234-1234-1234-123456789abc
+ a-12345678-1234=1234-1234-123456789abc
+ a-12345678-1234-1234=1234-123456789abc
+ a-12345678-1234-1234-1234=123456789abc
+ 1112345678-1234-1234-1234-123456789abc"
+
+ for f in $file_list; do
+ local file=$efivarfs_mount/$f
+
+ printf "$attrs\x00" 2>/dev/null > $file
+
+ if [ -e $file ]; then
+ echo "Creating $file should have failed" >&2
+ file_cleanup $file
+ ret=1
+ fi
+ done
+
+ exit $ret
+}
+
+check_prereqs
+
+rc=0
+
+run_test test_create
+run_test test_create_empty
+run_test test_create_read
+run_test test_delete
+run_test test_zero_size_delete
+run_test test_open_unlink
+run_test test_valid_filenames
+run_test test_invalid_filenames
+
+exit $rc
diff --git a/tools/testing/selftests/efivarfs/open-unlink.c b/tools/testing/selftests/efivarfs/open-unlink.c
new file mode 100644
index 0000000000..562742d44a
--- /dev/null
+++ b/tools/testing/selftests/efivarfs/open-unlink.c
@@ -0,0 +1,134 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <errno.h>
+#include <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/ioctl.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <linux/fs.h>
+
+static int set_immutable(const char *path, int immutable)
+{
+ unsigned int flags;
+ int fd;
+ int rc;
+ int error;
+
+ fd = open(path, O_RDONLY);
+ if (fd < 0)
+ return fd;
+
+ rc = ioctl(fd, FS_IOC_GETFLAGS, &flags);
+ if (rc < 0) {
+ error = errno;
+ close(fd);
+ errno = error;
+ return rc;
+ }
+
+ if (immutable)
+ flags |= FS_IMMUTABLE_FL;
+ else
+ flags &= ~FS_IMMUTABLE_FL;
+
+ rc = ioctl(fd, FS_IOC_SETFLAGS, &flags);
+ error = errno;
+ close(fd);
+ errno = error;
+ return rc;
+}
+
+static int get_immutable(const char *path)
+{
+ unsigned int flags;
+ int fd;
+ int rc;
+ int error;
+
+ fd = open(path, O_RDONLY);
+ if (fd < 0)
+ return fd;
+
+ rc = ioctl(fd, FS_IOC_GETFLAGS, &flags);
+ if (rc < 0) {
+ error = errno;
+ close(fd);
+ errno = error;
+ return rc;
+ }
+ close(fd);
+ if (flags & FS_IMMUTABLE_FL)
+ return 1;
+ return 0;
+}
+
+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, 0600);
+ 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);
+
+ rc = get_immutable(path);
+ if (rc < 0) {
+ perror("ioctl(FS_IOC_GETFLAGS)");
+ return EXIT_FAILURE;
+ } else if (rc) {
+ rc = set_immutable(path, 0);
+ if (rc < 0) {
+ perror("ioctl(FS_IOC_SETFLAGS)");
+ return EXIT_FAILURE;
+ }
+ }
+
+ 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;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-13 03:25:22 +0000