From 1c2b49a17282f3abd9ccf71b65d0be62d3b3192e Mon Sep 17 00:00:00 2001 From: Fam Zheng Date: Wed, 1 Apr 2015 09:45:39 +0800 Subject: [PATCH] block/null: Support reopen Reopen is used in block-commit. With this always-succeed operation, it is now possible to test committing to a null drive, by specifying "null-aio://" or "null-co://" as the backing image when creating the qcow2 image. Signed-off-by: Fam Zheng Reviewed-by: Eric Blake Reviewed-by: Stefan Hajnoczi Message-id: 1427852740-24315-3-git-send-email-famz@redhat.com Signed-off-by: Stefan Hajnoczi Signed-off-by: Kevin Wolf --- block/null.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/block/null.c b/block/null.c index 267d3e6ad9..7d083233fb 100644 --- a/block/null.c +++ b/block/null.c @@ -177,6 +177,12 @@ static BlockAIOCB *null_aio_flush(BlockDriverState *bs, return null_aio_common(bs, cb, opaque); } +static int null_reopen_prepare(BDRVReopenState *reopen_state, + BlockReopenQueue *queue, Error **errp) +{ + return 0; +} + static BlockDriver bdrv_null_co = { .format_name = "null-co", .protocol_name = "null-co", @@ -189,6 +195,7 @@ static BlockDriver bdrv_null_co = { .bdrv_co_readv = null_co_readv, .bdrv_co_writev = null_co_writev, .bdrv_co_flush_to_disk = null_co_flush, + .bdrv_reopen_prepare = null_reopen_prepare, }; static BlockDriver bdrv_null_aio = { @@ -203,6 +210,7 @@ static BlockDriver bdrv_null_aio = { .bdrv_aio_readv = null_aio_readv, .bdrv_aio_writev = null_aio_writev, .bdrv_aio_flush = null_aio_flush, + .bdrv_reopen_prepare = null_reopen_prepare, }; static void bdrv_null_init(void)