Merge branch 'for-3.5/core' of git://git.kernel.dk/linux-block

[karo-tx-linux.git] / include / linux / blkdev.h

diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 4d4ac24a263ea956457d4ea4a63f1431408a6d90..ba43f408baa38907a8f63a64314e07bb622a6e7f 100644 (file)
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -32,10 +32,17 @@ struct blk_trace;
 struct request;
 struct sg_io_hdr;
 struct bsg_job;
+struct blkcg_gq;
 
 #define BLKDEV_MIN_RQ  4
 #define BLKDEV_MAX_RQ  128     /* Default maximum */
 
+/*
+ * Maximum number of blkcg policies allowed to be registered concurrently.
+ * Defined here to simplify include dependency.
+ */
+#define BLKCG_MAX_POLS         2
+
 struct request;
 typedef void (rq_end_io_fn)(struct request *, int);
 
@@ -363,6 +370,11 @@ struct request_queue {
        struct list_head        timeout_list;
 
        struct list_head        icq_list;
+#ifdef CONFIG_BLK_CGROUP
+       DECLARE_BITMAP          (blkcg_pols, BLKCG_MAX_POLS);
+       struct blkcg_gq         *root_blkg;
+       struct list_head        blkg_list;
+#endif
 
        struct queue_limits     limits;
 
@@ -390,12 +402,17 @@ struct request_queue {
 
        struct mutex            sysfs_lock;
 
+       int                     bypass_depth;
+
 #if defined(CONFIG_BLK_DEV_BSG)
        bsg_job_fn              *bsg_job_fn;
        int                     bsg_job_size;
        struct bsg_class_device bsg_dev;
 #endif
 
+#ifdef CONFIG_BLK_CGROUP
+       struct list_head        all_q_node;
+#endif
 #ifdef CONFIG_BLK_DEV_THROTTLING
        /* Throttle data */
        struct throtl_data *td;
@@ -407,7 +424,7 @@ struct request_queue {
 #define        QUEUE_FLAG_SYNCFULL     3       /* read queue has been filled */
 #define QUEUE_FLAG_ASYNCFULL   4       /* write queue has been filled */
 #define QUEUE_FLAG_DEAD                5       /* queue being torn down */
-#define QUEUE_FLAG_ELVSWITCH   6       /* don't use elevator, just do FIFO */
+#define QUEUE_FLAG_BYPASS      6       /* act as dumb FIFO queue */
 #define QUEUE_FLAG_BIDI                7       /* queue supports bidi requests */
 #define QUEUE_FLAG_NOMERGES     8      /* disable merge attempts */
 #define QUEUE_FLAG_SAME_COMP   9       /* complete on same CPU-group */
@@ -491,6 +508,7 @@ static inline void queue_flag_clear(unsigned int flag, struct request_queue *q)
 #define blk_queue_tagged(q)    test_bit(QUEUE_FLAG_QUEUED, &(q)->queue_flags)
 #define blk_queue_stopped(q)   test_bit(QUEUE_FLAG_STOPPED, &(q)->queue_flags)
 #define blk_queue_dead(q)      test_bit(QUEUE_FLAG_DEAD, &(q)->queue_flags)
+#define blk_queue_bypass(q)    test_bit(QUEUE_FLAG_BYPASS, &(q)->queue_flags)
 #define blk_queue_nomerges(q)  test_bit(QUEUE_FLAG_NOMERGES, &(q)->queue_flags)
 #define blk_queue_noxmerges(q) \
        test_bit(QUEUE_FLAG_NOXMERGES, &(q)->queue_flags)