Merge tag 'dt-5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc

[linux-2.6-microblaze.git] / drivers / android / binderfs.c

diff --git a/drivers/android/binderfs.c b/drivers/android/binderfs.c
index e80ba93..e3605cd 100644 (file)
--- a/drivers/android/binderfs.c
+++ b/drivers/android/binderfs.c
@@ -58,6 +58,10 @@ enum binderfs_stats_mode {
        binderfs_stats_mode_global,
 };
 
+struct binder_features {
+       bool oneway_spam_detection;
+};
+
 static const struct constant_table binderfs_param_stats[] = {
        { "global", binderfs_stats_mode_global },
        {}
@@ -69,6 +73,10 @@ static const struct fs_parameter_spec binderfs_fs_parameters[] = {
        {}
 };
 
+static struct binder_features binder_features = {
+       .oneway_spam_detection = true,
+};
+
 static inline struct binderfs_info *BINDERFS_SB(const struct super_block *sb)
 {
        return sb->s_fs_info;
@@ -583,6 +591,33 @@ out:
        return dentry;
 }
 
+static int binder_features_show(struct seq_file *m, void *unused)
+{
+       bool *feature = m->private;
+
+       seq_printf(m, "%d\n", *feature);
+
+       return 0;
+}
+DEFINE_SHOW_ATTRIBUTE(binder_features);
+
+static int init_binder_features(struct super_block *sb)
+{
+       struct dentry *dentry, *dir;
+
+       dir = binderfs_create_dir(sb->s_root, "features");
+       if (IS_ERR(dir))
+               return PTR_ERR(dir);
+
+       dentry = binderfs_create_file(dir, "oneway_spam_detection",
+                                     &binder_features_fops,
+                                     &binder_features.oneway_spam_detection);
+       if (IS_ERR(dentry))
+               return PTR_ERR(dentry);
+
+       return 0;
+}
+
 static int init_binder_logs(struct super_block *sb)
 {
        struct dentry *binder_logs_root_dir, *dentry, *proc_log_dir;
@@ -723,6 +758,10 @@ static int binderfs_fill_super(struct super_block *sb, struct fs_context *fc)
                        name++;
        }
 
+       ret = init_binder_features(sb);
+       if (ret)
+               return ret;
+
        if (info->mount_opts.stats_mode == binderfs_stats_mode_global)
                return init_binder_logs(sb);