From 23d0ba9319f182e258f480bafb7de9f79fb6e0e9 Mon Sep 17 00:00:00 2001 From: Fam Zheng Date: Tue, 16 Jan 2018 14:08:56 +0800 Subject: block: Introduce buf register API Allow block driver to map and unmap a buffer for later I/O, as a performance hint. Signed-off-by: Fam Zheng Reviewed-by: Stefan Hajnoczi Message-Id: <20180116060901.17413-5-famz@redhat.com> Signed-off-by: Fam Zheng --- block/block-backend.c | 10 ++++++++++ 1 file changed, 10 insertions(+) (limited to 'block/block-backend.c') diff --git a/block/block-backend.c b/block/block-backend.c index baef8e7abc..f66349c2c9 100644 --- a/block/block-backend.c +++ b/block/block-backend.c @@ -2096,3 +2096,13 @@ static void blk_root_drained_end(BdrvChild *child) } } } + +void blk_register_buf(BlockBackend *blk, void *host, size_t size) +{ + bdrv_register_buf(blk_bs(blk), host, size); +} + +void blk_unregister_buf(BlockBackend *blk, void *host) +{ + bdrv_unregister_buf(blk_bs(blk), host); +} -- cgit v1.2.1