1 files changed, 91 insertions, 0 deletions

diff --git a/block/blk-wbt.c b/block/blk-wbt.c
index 463e4eb80287..f0c56649775f 100644
--- a/block/blk-wbt.c
+++ b/block/blk-wbt.c
@@ -715,6 +715,94 @@ void wbt_disable_default(struct request_queue *q)
 }
 EXPORT_SYMBOL_GPL(wbt_disable_default);
 
+#ifdef CONFIG_BLK_DEBUG_FS
+static int wbt_curr_win_nsec_show(void *data, struct seq_file *m)
+{
+        struct rq_qos *rqos = data;
+        struct rq_wb *rwb = RQWB(rqos);
+
+        seq_printf(m, "%llu\n", rwb->cur_win_nsec);
+        return 0;
+}
+
+static int wbt_enabled_show(void *data, struct seq_file *m)
+{
+        struct rq_qos *rqos = data;
+        struct rq_wb *rwb = RQWB(rqos);
+
+        seq_printf(m, "%d\n", rwb->enable_state);
+        return 0;
+}
+
+static int wbt_id_show(void *data, struct seq_file *m)
+{
+        struct rq_qos *rqos = data;
+
+        seq_printf(m, "%u\n", rqos->id);
+        return 0;
+}
+
+static int wbt_inflight_show(void *data, struct seq_file *m)
+{
+        struct rq_qos *rqos = data;
+        struct rq_wb *rwb = RQWB(rqos);
+        int i;
+
+        for (i = 0; i < WBT_NUM_RWQ; i++)
+                seq_printf(m, "%d: inflight %d\n", i,
+                           atomic_read(&rwb->rq_wait[i].inflight));
+        return 0;
+}
+
+static int wbt_min_lat_nsec_show(void *data, struct seq_file *m)
+{
+        struct rq_qos *rqos = data;
+        struct rq_wb *rwb = RQWB(rqos);
+
+        seq_printf(m, "%lu\n", rwb->min_lat_nsec);
+        return 0;
+}
+
+static int wbt_unknown_cnt_show(void *data, struct seq_file *m)
+{
+        struct rq_qos *rqos = data;
+        struct rq_wb *rwb = RQWB(rqos);
+
+        seq_printf(m, "%u\n", rwb->unknown_cnt);
+        return 0;
+}
+
+static int wbt_normal_show(void *data, struct seq_file *m)
+{
+        struct rq_qos *rqos = data;
+        struct rq_wb *rwb = RQWB(rqos);
+
+        seq_printf(m, "%u\n", rwb->wb_normal);
+        return 0;
+}
+
+static int wbt_background_show(void *data, struct seq_file *m)
+{
+        struct rq_qos *rqos = data;
+        struct rq_wb *rwb = RQWB(rqos);
+
+        seq_printf(m, "%u\n", rwb->wb_background);
+        return 0;
+}
+
+static const struct blk_mq_debugfs_attr wbt_debugfs_attrs[] = {
+        {"curr_win_nsec", 0400, wbt_curr_win_nsec_show},
+        {"enabled", 0400, wbt_enabled_show},
+        {"id", 0400, wbt_id_show},
+        {"inflight", 0400, wbt_inflight_show},
+        {"min_lat_nsec", 0400, wbt_min_lat_nsec_show},
+        {"unknown_cnt", 0400, wbt_unknown_cnt_show},
+        {"wb_normal", 0400, wbt_normal_show},
+        {"wb_background", 0400, wbt_background_show},
+        {},
+};
+#endif
+
 static struct rq_qos_ops wbt_rqos_ops = {
         .throttle = wbt_wait,
         .issue = wbt_issue,
@@ -723,6 +811,9 @@ static struct rq_qos_ops wbt_rqos_ops = {
         .done = wbt_done,
         .cleanup = wbt_cleanup,
         .exit = wbt_exit,
+#ifdef CONFIG_BLK_DEBUG_FS
+        .debugfs_attrs = wbt_debugfs_attrs,
+#endif
 };
 
 int wbt_init(struct request_queue *q)