ASR_BASE
Change-Id: Icf3719cc0afe3eeb3edc7fa80a2eb5199ca9dda1
diff --git a/marvell/linux/tools/testing/selftests/efivarfs/open-unlink.c b/marvell/linux/tools/testing/selftests/efivarfs/open-unlink.c
new file mode 100644
index 0000000..562742d
--- /dev/null
+++ b/marvell/linux/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;
+}