linux-kernel - [PATCH v15 3/3] binder: generic netlink binder

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Message-ID: <20250226192047.734627-4-dualli@chromium.org>
Date: Wed, 26 Feb 2025 11:20:47 -0800
From: Li Li <dualli@...omium.org>
To: dualli@...gle.com,
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Cc: smoreland@...gle.com,
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Subject: [PATCH v15 3/3] binder: generic netlink binder_features flag

From: Li Li <dualli@...gle.com>

Add a flag to binder_features to indicate that the generic netlink
feature is available.

Signed-off-by: Li Li <dualli@...gle.com>
---
 drivers/android/binderfs.c                                | 8 ++++++++
 .../selftests/filesystems/binderfs/binderfs_test.c        | 1 +
 2 files changed, 9 insertions(+)

diff --git a/drivers/android/binderfs.c b/drivers/android/binderfs.c
index 94c6446604fc..b3d21ccd81f2 100644
--- a/drivers/android/binderfs.c
+++ b/drivers/android/binderfs.c
@@ -59,6 +59,7 @@ struct binder_features {
 	bool oneway_spam_detection;
 	bool extended_error;
 	bool freeze_notification;
+	bool generic_netlink;
 };
 
 static const struct constant_table binderfs_param_stats[] = {
@@ -76,6 +77,7 @@ static struct binder_features binder_features = {
 	.oneway_spam_detection = true,
 	.extended_error = true,
 	.freeze_notification = true,
+	.generic_netlink = true,
 };
 
 static inline struct binderfs_info *BINDERFS_SB(const struct super_block *sb)
@@ -619,6 +621,12 @@ static int init_binder_features(struct super_block *sb)
 	if (IS_ERR(dentry))
 		return PTR_ERR(dentry);
 
+	dentry = binderfs_create_file(dir, "generic_netlink",
+				      &binder_features_fops,
+				      &binder_features.generic_netlink);
+	if (IS_ERR(dentry))
+		return PTR_ERR(dentry);
+
 	return 0;
 }
 
diff --git a/tools/testing/selftests/filesystems/binderfs/binderfs_test.c b/tools/testing/selftests/filesystems/binderfs/binderfs_test.c
index 81db85a5cc16..96e64ebf910f 100644
--- a/tools/testing/selftests/filesystems/binderfs/binderfs_test.c
+++ b/tools/testing/selftests/filesystems/binderfs/binderfs_test.c
@@ -65,6 +65,7 @@ static int __do_binderfs_test(struct __test_metadata *_metadata)
 		"oneway_spam_detection",
 		"extended_error",
 		"freeze_notification",
+		"generic_netlink",
 	};
 
 	change_mountns(_metadata);
-- 
2.48.1.658.g4767266eb4-goog