Hi Christian,
On 1/16/19 3:27 PM, Christian Brauner wrote:
This adds the promised selftest for binderfs. It will verify the following
things:
- binderfs mounting works
- binder device allocation works
- performing a binder ioctl() request through a binderfs device works
- binder device removal works
- binder-control removal fails
- binderfs unmounting works
Thanks for the patch. A few comments below.
Cc: Todd Kjos <tkjos@xxxxxxxxxx>
Signed-off-by: Christian Brauner <christian.brauner@xxxxxxxxxx>
---
/* Changelog */
v1:
- check for ENODEV on mount failure to detect whether binderfs is
available
If it is not, skip the test and exit with success.
---
tools/testing/selftests/Makefile | 1 +
.../selftests/filesystems/binderfs/.gitignore | 1 +
.../selftests/filesystems/binderfs/Makefile | 6 +
.../filesystems/binderfs/binderfs_test.c | 126 ++++++++++++++++++
.../selftests/filesystems/binderfs/config | 3 +
5 files changed, 137 insertions(+)
create mode 100644 tools/testing/selftests/filesystems/binderfs/.gitignore
create mode 100644 tools/testing/selftests/filesystems/binderfs/Makefile
create mode 100644 tools/testing/selftests/filesystems/binderfs/binderfs_test.c
create mode 100644 tools/testing/selftests/filesystems/binderfs/config
diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile
index 1a2bd15c5b6e..400ee81a3043 100644
--- a/tools/testing/selftests/Makefile
+++ b/tools/testing/selftests/Makefile
@@ -10,6 +10,7 @@ TARGETS += drivers/dma-buf
TARGETS += efivarfs
TARGETS += exec
TARGETS += filesystems
+TARGETS += filesystems/binderfs
TARGETS += firmware
TARGETS += ftrace
TARGETS += futex
diff --git a/tools/testing/selftests/filesystems/binderfs/.gitignore b/tools/testing/selftests/filesystems/binderfs/.gitignore
new file mode 100644
index 000000000000..8a5d9bf63dd4
--- /dev/null
+++ b/tools/testing/selftests/filesystems/binderfs/.gitignore
@@ -0,0 +1 @@
+binderfs_test
diff --git a/tools/testing/selftests/filesystems/binderfs/Makefile b/tools/testing/selftests/filesystems/binderfs/Makefile
new file mode 100644
index 000000000000..58cb659b56b4
--- /dev/null
+++ b/tools/testing/selftests/filesystems/binderfs/Makefile
@@ -0,0 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0
+
+CFLAGS += -I../../../../../usr/include/
+TEST_GEN_PROGS := binderfs_test
+
+include ../../lib.mk
diff --git a/tools/testing/selftests/filesystems/binderfs/binderfs_test.c b/tools/testing/selftests/filesystems/binderfs/binderfs_test.c
new file mode 100644
index 000000000000..34361efcb9c8
--- /dev/null
+++ b/tools/testing/selftests/filesystems/binderfs/binderfs_test.c
@@ -0,0 +1,126 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#define _GNU_SOURCE
+#include <errno.h>
+#include <fcntl.h>
+#include <sched.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/ioctl.h>
+#include <sys/mount.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include <linux/android/binder.h>
+#include <linux/android/binderfs.h>
+#include "../../kselftest.h"
+
+int main(int argc, char *argv[])
+{
+ int fd, ret, saved_errno;
+ size_t len;
+ struct binderfs_device device = { 0 };
+ struct binder_version version = { 0 };
+
+ ret = unshare(CLONE_NEWNS);
+ if (ret < 0)
+ ksft_exit_fail_msg("%s - Failed to unshare mount namespace\n",
+ strerror(errno));
+
+ ret = mount(NULL, "/", NULL, MS_REC | MS_PRIVATE, 0);
+ if (ret < 0)
+ ksft_exit_fail_msg("%s - Failed to mount / as private\n",
+ strerror(errno));
+
If this test requires user to be root, please add check for root uid and
do a skip the test with kselftest skip code.
+ ret = mkdir("/dev/binderfs", 0755);
+ if (ret < 0 && errno != EEXIST)
+ ksft_exit_fail_msg(
+ "%s - Failed to create binderfs mountpoint\n",
+ strerror(errno));
+
+ ret = mount(NULL, "/dev/binderfs", "binder", 0, 0);
+ if (ret < 0) {
+ if (errno != ENODEV)
+ ksft_exit_fail_msg("%s - Failed to mount binderfs\n",
+ strerror(errno));
+
+ ksft_test_result_skip(
+ "The Android binderfs filesystem is not available\n")
Use ksft_exit_skip() instead of ksft_test_result_skip()
+ ksft_exit_pass();
ksft_exit_pass() would result in false pass cases. Skip is the correct
exit code.
Think about other exit paths to see if skip is more appropriate.
thanks,
-- Shuah
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