add support for omap3 usbhost power domain control

[qemu] / block-qcow2.c

diff --git a/block-qcow2.c b/block-qcow2.c
index d99811d..6eba524 100644 (file)
--- a/block-qcow2.c
+++ b/block-qcow2.c
@@ -2721,6 +2721,31 @@ static void dump_refcounts(BlockDriverState *bs)
 #endif
 #endif
 
+static int qcow_put_buffer(BlockDriverState *bs, const uint8_t *buf,
+                           int64_t pos, int size)
+{
+    int growable = bs->growable;
+
+    bs->growable = 1;
+    bdrv_pwrite(bs, pos, buf, size);
+    bs->growable = growable;
+
+    return size;
+}
+
+static int qcow_get_buffer(BlockDriverState *bs, uint8_t *buf,
+                           int64_t pos, int size)
+{
+    int growable = bs->growable;
+    int ret;
+
+    bs->growable = 1;
+    ret = bdrv_pread(bs, pos, buf, size);
+    bs->growable = growable;
+
+    return ret;
+}
+
 BlockDriver bdrv_qcow2 = {
     .format_name       = "qcow2",
     .instance_size     = sizeof(BDRVQcowState),
@@ -2745,5 +2770,8 @@ BlockDriver bdrv_qcow2 = {
     .bdrv_snapshot_list        = qcow_snapshot_list,
     .bdrv_get_info     = qcow_get_info,
 
+    .bdrv_put_buffer    = qcow_put_buffer,
+    .bdrv_get_buffer    = qcow_get_buffer,
+
     .bdrv_create2 = qcow_create2,
 };