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authorJens Axboe <axboe@fb.com>2014-05-19 11:52:35 -0600
committerJens Axboe <axboe@fb.com>2014-05-19 11:52:35 -0600
commit39a9f97e5ea99e048c4980c23cf197f6e77995cb (patch)
treeb1f72ed1e852372b6d86b79157b09f77fabc5a20 /block/blk-mq-tag.h
parent1429d7c9467e1e3de0b0ff91d7e4d67c1a92f8a3 (diff)
parent0d2602ca30e410e84e8bdf05c84ed5688e0a5a44 (diff)
Merge branch 'for-3.16/blk-mq-tagging' into for-3.16/core
Signed-off-by: Jens Axboe <axboe@fb.com> Conflicts: block/blk-mq-tag.c
Diffstat (limited to 'block/blk-mq-tag.h')
-rw-r--r--block/blk-mq-tag.h27
1 files changed, 24 insertions, 3 deletions
diff --git a/block/blk-mq-tag.h b/block/blk-mq-tag.h
index 9014269f3910..e144f68ec45f 100644
--- a/block/blk-mq-tag.h
+++ b/block/blk-mq-tag.h
@@ -35,6 +35,8 @@ struct blk_mq_tags {
unsigned int nr_tags;
unsigned int nr_reserved_tags;
+ atomic_t active_queues;
+
struct blk_mq_bitmap_tags bitmap_tags;
struct blk_mq_bitmap_tags breserved_tags;
@@ -46,9 +48,9 @@ struct blk_mq_tags {
extern struct blk_mq_tags *blk_mq_init_tags(unsigned int nr_tags, unsigned int reserved_tags, int node);
extern void blk_mq_free_tags(struct blk_mq_tags *tags);
-extern unsigned int blk_mq_get_tag(struct blk_mq_tags *tags, struct blk_mq_hw_ctx *hctx, unsigned int *last_tag, gfp_t gfp, bool reserved);
-extern void blk_mq_wait_for_tags(struct blk_mq_tags *tags, struct blk_mq_hw_ctx *hctx, bool reserved);
-extern void blk_mq_put_tag(struct blk_mq_tags *tags, unsigned int tag, unsigned int *last_tag);
+extern unsigned int blk_mq_get_tag(struct blk_mq_hw_ctx *hctx, unsigned int *last_tag, gfp_t gfp, bool reserved);
+extern void blk_mq_wait_for_tags(struct blk_mq_hw_ctx *hctx, bool reserved);
+extern void blk_mq_put_tag(struct blk_mq_hw_ctx *hctx, unsigned int tag, unsigned int *last_tag);
extern void blk_mq_tag_busy_iter(struct blk_mq_tags *tags, void (*fn)(void *data, unsigned long *), void *data);
extern bool blk_mq_has_free_tags(struct blk_mq_tags *tags);
extern ssize_t blk_mq_tag_sysfs_show(struct blk_mq_tags *tags, char *page);
@@ -65,4 +67,23 @@ enum {
BLK_MQ_TAG_MAX = BLK_MQ_TAG_FAIL - 1,
};
+extern bool __blk_mq_tag_busy(struct blk_mq_hw_ctx *);
+extern void __blk_mq_tag_idle(struct blk_mq_hw_ctx *);
+
+static inline bool blk_mq_tag_busy(struct blk_mq_hw_ctx *hctx)
+{
+ if (!(hctx->flags & BLK_MQ_F_TAG_SHARED))
+ return false;
+
+ return __blk_mq_tag_busy(hctx);
+}
+
+static inline void blk_mq_tag_idle(struct blk_mq_hw_ctx *hctx)
+{
+ if (!(hctx->flags & BLK_MQ_F_TAG_SHARED))
+ return;
+
+ __blk_mq_tag_idle(hctx);
+}
+
#endif