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authorMing Lei <ming.lei@canonical.com>2014-07-04 18:04:33 +0800
committerStefan Hajnoczi <stefanha@redhat.com>2014-07-07 11:05:17 +0200
commit448ad91db4a560c01f89bd6f7e4bec7d869926a5 (patch)
treea326648a01081363fdcc6ece7ef45b34e3a0b5eb /include
parent5a18e67dfd515992076c5fcae47035fdd3ed2462 (diff)
downloadhqemu-448ad91db4a560c01f89bd6f7e4bec7d869926a5.zip
hqemu-448ad91db4a560c01f89bd6f7e4bec7d869926a5.tar.gz
block: block: introduce APIs for submitting IO as a batch
This patch introduces three APIs so that following patches can support queuing I/O requests and submitting them as a batch for improving I/O performance. Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Ming Lei <ming.lei@canonical.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'include')
-rw-r--r--include/block/block.h4
-rw-r--r--include/block/block_int.h5
2 files changed, 9 insertions, 0 deletions
diff --git a/include/block/block.h b/include/block/block.h
index baecc26..32d3676 100644
--- a/include/block/block.h
+++ b/include/block/block.h
@@ -584,4 +584,8 @@ AioContext *bdrv_get_aio_context(BlockDriverState *bs);
*/
void bdrv_set_aio_context(BlockDriverState *bs, AioContext *new_context);
+void bdrv_io_plug(BlockDriverState *bs);
+void bdrv_io_unplug(BlockDriverState *bs);
+void bdrv_flush_io_queue(BlockDriverState *bs);
+
#endif
diff --git a/include/block/block_int.h b/include/block/block_int.h
index 8f8e65e..f6c3bef 100644
--- a/include/block/block_int.h
+++ b/include/block/block_int.h
@@ -261,6 +261,11 @@ struct BlockDriver {
void (*bdrv_attach_aio_context)(BlockDriverState *bs,
AioContext *new_context);
+ /* io queue for linux-aio */
+ void (*bdrv_io_plug)(BlockDriverState *bs);
+ void (*bdrv_io_unplug)(BlockDriverState *bs);
+ void (*bdrv_flush_io_queue)(BlockDriverState *bs);
+
QLIST_ENTRY(BlockDriver) list;
};
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