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Subject[PATCH v2 3/3] 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.

Signed-off-by: Carlos Llamas <cmllamas@google.com>
---
.../filesystems/binderfs/binderfs_test.c | 17 +++++++++++++++++
1 file changed, 17 insertions(+)

diff --git a/tools/testing/selftests/filesystems/binderfs/binderfs_test.c b/tools/testing/selftests/filesystems/binderfs/binderfs_test.c
index 477cbb042f5b..0315955ff0f4 100644
--- a/tools/testing/selftests/filesystems/binderfs/binderfs_test.c
+++ b/tools/testing/selftests/filesystems/binderfs/binderfs_test.c
@@ -62,6 +62,9 @@ static int __do_binderfs_test(struct __test_metadata *_metadata)
struct binder_version version = { 0 };
char binderfs_mntpt[] = P_tmpdir "/binderfs_XXXXXX",
device_path[sizeof(P_tmpdir "/binderfs_XXXXXX/") + BINDERFS_MAX_NAME];
+ static const char * const binder_features[] = {
+ "oneway_spam_detection",
+ };

change_mountns(_metadata);

@@ -150,6 +153,20 @@ static int __do_binderfs_test(struct __test_metadata *_metadata)
}

/* success: binder-control device removal failed as expected */
+
+ for (int i = 0; i < ARRAY_SIZE(binder_features); i++) {
+ snprintf(device_path, sizeof(device_path), "%s/features/%s",
+ binderfs_mntpt, binder_features[i]);
+ fd = open(device_path, O_CLOEXEC | O_RDONLY);
+ EXPECT_GE(fd, 0) {
+ TH_LOG("%s - Failed to open binder feature: %s",
+ strerror(errno), binder_features[i]);
+ goto umount;
+ }
+ close(fd);
+ }
+
+ /* success: binder feature files found */
result = 0;

umount:
--
2.32.0.93.g670b81a890-goog
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