blkio: Add more debug-only per-cgroup stats

[safe/jmp/linux-2.6] / block / blk.h

diff --git a/block/blk.h b/block/blk.h
index 9b2c324..5ee3d7e 100644 (file)
--- a/block/blk.h
+++ b/block/blk.h
@@ -13,6 +13,9 @@ extern struct kobj_type blk_queue_ktype;
 void init_request_from_bio(struct request *req, struct bio *bio);
 void blk_rq_bio_prep(struct request_queue *q, struct request *rq,
                        struct bio *bio);
+int blk_rq_append_bio(struct request_queue *q, struct request *rq,
+                     struct bio *bio);
+void blk_dequeue_request(struct request *rq);
 void __blk_queue_free_tags(struct request_queue *q);
 
 void blk_unplug_work(struct work_struct *work);
@@ -101,7 +104,7 @@ int ll_front_merge_fn(struct request_queue *q, struct request *req,
 int attempt_back_merge(struct request_queue *q, struct request *rq);
 int attempt_front_merge(struct request_queue *q, struct request *rq);
 void blk_recalc_rq_segments(struct request *rq);
-void blk_recalc_rq_sectors(struct request *rq, int nsect);
+void blk_rq_set_mixed_merge(struct request *rq);
 
 void blk_queue_congestion_threshold(struct request_queue *q);
 
@@ -149,9 +152,17 @@ static inline int blk_cpu_to_group(int cpu)
 #endif
 }
 
+/*
+ * Contribute to IO statistics IFF:
+ *
+ *     a) it's attached to a gendisk, and
+ *     b) the queue had IO stats enabled when this request was started, and
+ *     c) it's a file system request or a discard request
+ */
 static inline int blk_do_io_stat(struct request *rq)
 {
-       return rq->rq_disk && blk_rq_io_stat(rq);
+       return rq->rq_disk && blk_rq_io_stat(rq) &&
+              (blk_fs_request(rq) || blk_discard_rq(rq));
 }
 
 #endif