Disk cache flush support.

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1949 c046a42c-6fe2-441c-8c8c-71466251a162

1 files changed, 7 insertions, 0 deletions

diff --git a/block-qcow.c b/block-qcow.c
index 34026a4f2c..e5b52fb861 100644
--- a/block-qcow.c
+++ b/block-qcow.c
@@ -693,6 +693,12 @@ int qcow_compress_cluster(BlockDriverState *bs, int64_t sector_num,
     return 0;
 }
 
+static void qcow_flush(BlockDriverState *bs)
+{
+    BDRVQcowState *s = bs->opaque;
+    fsync(s->fd);
+}
+
 BlockDriver bdrv_qcow = {
     "qcow",
     sizeof(BDRVQcowState),
@@ -702,6 +708,7 @@ BlockDriver bdrv_qcow = {
     qcow_write,
     qcow_close,
     qcow_create,
+    qcow_flush,
     qcow_is_allocated,
     qcow_set_key,
     qcow_make_empty