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 <lxiang@xxxxxxxxxx>.
Signed-off-by: Jeremy Kerr <jk@xxxxxxxxxx>
CC: linux-efi@xxxxxxxxxxxxxxx
CC: Lingzhu Xiang <lxiang@xxxxxxxxxx>
CC: Matt Fleming <matt@xxxxxxxxxxxxxxxxx>
---
tools/testing/selftests/Makefile | 2
tools/testing/selftests/efivarfs/Makefile | 12 +
tools/testing/selftests/efivarfs/efivarfs.sh | 119 +++++++++++++++++
tools/testing/selftests/efivarfs/open-unlink.c | 63 +++++++++
4 files changed, 195 insertions(+), 1 deletion(-)
diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile
index 4348014..921dcdc 100644
--- a/tools/testing/selftests/Makefile
+++ b/tools/testing/selftests/Makefile
@@ -1,4 +1,4 @@
-TARGETS = breakpoints kcmp mqueue vm cpu-hotplug memory-hotplug epoll
+TARGETS = breakpoints kcmp mqueue vm cpu-hotplug memory-hotplug epoll efivarfs
all:
for TARGET in $(TARGETS); do \
diff --git a/tools/testing/selftests/efivarfs/Makefile b/tools/testing/selftests/efivarfs/Makefile
new file mode 100644
index 0000000..1a943ee
--- /dev/null
+++ b/tools/testing/selftests/efivarfs/Makefile
@@ -0,0 +1,12 @@
+CC = $(CROSS_COMPILE)gcc
+CFLAGS = -Wall
+
+test_objs = open-unlink
+
+all: $(test_objs)
+
+run_tests: all
+ @./efivarfs.sh || echo "efivarfs selftests: [FAIL]"
+
+clean:
+ rm -f $(test_objs)
diff --git a/tools/testing/selftests/efivarfs/efivarfs.sh b/tools/testing/selftests/efivarfs/efivarfs.sh
new file mode 100755
index 0000000..e8c0d27
--- /dev/null
+++ b/tools/testing/selftests/efivarfs/efivarfs.sh
@@ -0,0 +1,119 @@
+#!/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
diff --git a/tools/testing/selftests/efivarfs/open-unlink.c b/tools/testing/selftests/efivarfs/open-unlink.c
new file mode 100644
index 0000000..8c07644
--- /dev/null
+++ b/tools/testing/selftests/efivarfs/open-unlink.c
@@ -0,0 +1,63 @@
+#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;
+}
--
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