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[Qemu-block] [PATCH 2/3] block/null: Support reopen
From: |
Fam Zheng |
Subject: |
[Qemu-block] [PATCH 2/3] block/null: Support reopen |
Date: |
Mon, 30 Mar 2015 17:23:19 +0800 |
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 <address@hidden>
---
block/null.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/block/null.c b/block/null.c
index fa56eac..e0cb612 100644
--- a/block/null.c
+++ b/block/null.c
@@ -178,6 +178,12 @@ 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",
@@ -190,6 +196,7 @@ 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 = {
@@ -204,6 +211,7 @@ 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)
--
1.9.3