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BACKPORT: selftests/binderfs: add test for feature files

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Verify that feature files are created successfully after mounting a
binderfs instance. Note that only "oneway_spam_detection" feature is
tested with this patch as it is currently the only feature listed.

Acked-by: Christian Brauner <christian.brauner@ubuntu.com>
Signed-off-by: Carlos Llamas <cmllamas@google.com>
Link: https://lore.kernel.org/r/20210715031805.1725878-3-cmllamas@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
(cherry picked from commit 07e913418ce4ba5eb620dd4668bf91ec94e11136)
Bug: 191910201
Signed-off-by: Carlos Llamas <cmllamas@google.com>
[cmllamas: fix merge issues due to missing eaa163caa4cc]
Change-Id: I86d7ef34b3099c8714c319e48029aaf3dbf87081
This commit is contained in:
Carlos Llamas 2021-07-15 03:18:05 +00:00
parent 4d4f8b7a7f
commit 8c4165a043
1 changed files with 22 additions and 0 deletions
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22
tools/testing/selftests/filesystems/binderfs/binderfs_test.c
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@ -17,6 +17,10 @@
#include <linux/android/binderfs.h>
#include "../../kselftest.h"
#ifndef ARRAY_SIZE
#define ARRAY_SIZE(a) (sizeof(a) / sizeof(a[0]))
#endif
static ssize_t write_nointr(int fd, const void *buf, size_t count)
{
ssize_t ret;
@ -140,6 +144,10 @@ static void __do_binderfs_test(void)
bool keep = false;
struct binderfs_device device = { 0 };
struct binder_version version = { 0 };
char device_path[sizeof("/dev/binderfs/") + BINDERFS_MAX_NAME];
static const char * const binder_features[] = {
"oneway_spam_detection",
};
change_to_mountns();
@ -241,6 +249,20 @@ static void __do_binderfs_test(void)
/* binder-control device removal failed as expected */
ksft_inc_xfail_cnt();
for (int i = 0; i < ARRAY_SIZE(binder_features); i++) {
snprintf(device_path, sizeof(device_path),
"/dev/binderfs/features/%s", binder_features[i]);
fd = open(device_path, O_CLOEXEC | O_RDONLY);
if (fd < 0) {
ksft_exit_fail_msg("%s - Failed to open binder feature: %s",
strerror(errno), binder_features[i]);
}
close(fd);
}
/* success: binder feature files found */
ksft_inc_pass_cnt();
on_error:
ret = umount2("/dev/binderfs", MNT_DETACH);
keep ?: rmdir_protect_errno("/dev/binderfs");