diff --git a/drivers/android/binderfs.c b/drivers/android/binderfs.c index f303106b3362..98678d965010 100644 --- a/drivers/android/binderfs.c +++ b/drivers/android/binderfs.c @@ -59,12 +59,20 @@ enum binderfs_stats_mode { STATS_GLOBAL, }; +struct binder_features { + bool oneway_spam_detection; +}; + static const match_table_t tokens = { { Opt_max, "max=%d" }, { Opt_stats_mode, "stats=%s" }, { Opt_err, NULL } }; +static struct binder_features binder_features = { + .oneway_spam_detection = true, +}; + static inline struct binderfs_info *BINDERFS_I(const struct inode *inode) { return inode->i_sb->s_fs_info; @@ -589,6 +597,33 @@ 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; @@ -730,6 +765,10 @@ static int binderfs_fill_super(struct super_block *sb, void *data, int silent) name++; } + ret = init_binder_features(sb); + if (ret) + return ret; + if (info->mount_opts.stats_mode == STATS_GLOBAL) return init_binder_logs(sb);