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[Qemu-devel] [PATCH 2/2] qcow/qcow2: implement bdrv_aio_flush
From: |
Christoph Hellwig |
Subject: |
[Qemu-devel] [PATCH 2/2] qcow/qcow2: implement bdrv_aio_flush |
Date: |
Tue, 12 Jan 2010 13:49:43 +0100 |
User-agent: |
Mutt/1.3.28i |
From: Kevin Wolf <address@hidden>
Now that we do not have to flush the backing device anymore implementing
the bdrv_aio_flush method for image formats is trivial.
[hch: forward ported to qemu mainline from a product tree]
Signed-off-by: Kevin Wolf <address@hidden>
Signed-off-by: Christoph Hellwig <address@hidden>
Index: qemu/block/qcow2.c
===================================================================
--- qemu.orig/block/qcow2.c 2010-01-12 11:43:13.745003589 +0100
+++ qemu/block/qcow2.c 2010-01-12 11:43:33.502003548 +0100
@@ -1012,6 +1012,14 @@ static void qcow_flush(BlockDriverState
bdrv_flush(s->hd);
}
+static BlockDriverAIOCB *qcow_aio_flush(BlockDriverState *bs,
+ BlockDriverCompletionFunc *cb, void *opaque)
+{
+ BDRVQcowState *s = bs->opaque;
+
+ return bdrv_aio_flush(s->hd, cb, opaque);
+}
+
static int64_t qcow_vm_state_offset(BDRVQcowState *s)
{
return (int64_t)s->l1_vm_state_index << (s->cluster_bits + s->l2_bits);
@@ -1126,6 +1134,7 @@ static BlockDriver bdrv_qcow2 = {
.bdrv_aio_readv = qcow_aio_readv,
.bdrv_aio_writev = qcow_aio_writev,
+ .bdrv_aio_flush = qcow_aio_flush,
.bdrv_write_compressed = qcow_write_compressed,
.bdrv_snapshot_create = qcow2_snapshot_create,
Index: qemu/block/qcow.c
===================================================================
--- qemu.orig/block/qcow.c 2010-01-12 11:43:36.819003870 +0100
+++ qemu/block/qcow.c 2010-01-12 11:44:27.855256142 +0100
@@ -900,6 +900,14 @@ static void qcow_flush(BlockDriverState
bdrv_flush(s->hd);
}
+static BlockDriverAIOCB *qcow_aio_flush(BlockDriverState *bs,
+ BlockDriverCompletionFunc *cb, void *opaque)
+{
+ BDRVQcowState *s = bs->opaque;
+
+ return bdrv_aio_flush(s->hd, cb, opaque);
+}
+
static int qcow_get_info(BlockDriverState *bs, BlockDriverInfo *bdi)
{
BDRVQcowState *s = bs->opaque;
@@ -940,6 +948,7 @@ static BlockDriver bdrv_qcow = {
.bdrv_make_empty = qcow_make_empty,
.bdrv_aio_readv = qcow_aio_readv,
.bdrv_aio_writev = qcow_aio_writev,
+ .bdrv_aio_flush = qcow_aio_flush,
.bdrv_write_compressed = qcow_write_compressed,
.bdrv_get_info = qcow_get_info,
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