raw: Implement copy offloading

Just pass down to ->file.

Signed-off-by: Fam Zheng <famz@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-id: 20180601092648.24614-4-famz@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

block/raw-format.c

@@ -497,6 +497,36 @@ static int raw_probe_geometry(BlockDriverState *bs, HDGeometry *geo)
     return bdrv_probe_geometry(bs->file->bs, geo);
 }
 
+static int coroutine_fn raw_co_copy_range_from(BlockDriverState *bs,
+                                               BdrvChild *src, uint64_t src_offset,
+                                               BdrvChild *dst, uint64_t dst_offset,
+                                               uint64_t bytes, BdrvRequestFlags flags)
+{
+    int ret;
+
+    ret = raw_adjust_offset(bs, &src_offset, bytes, false);
+    if (ret) {
+        return ret;
+    }
+    return bdrv_co_copy_range_from(bs->file, src_offset, dst, dst_offset,
+                                   bytes, flags);
+}
+
+static int coroutine_fn raw_co_copy_range_to(BlockDriverState *bs,
+                                             BdrvChild *src, uint64_t src_offset,
+                                             BdrvChild *dst, uint64_t dst_offset,
+                                             uint64_t bytes, BdrvRequestFlags flags)
+{
+    int ret;
+
+    ret = raw_adjust_offset(bs, &dst_offset, bytes, true);
+    if (ret) {
+        return ret;
+    }
+    return bdrv_co_copy_range_to(src, src_offset, bs->file, dst_offset, bytes,
+                                 flags);
+}
+
 BlockDriver bdrv_raw = {
     .format_name          = "raw",
     .instance_size        = sizeof(BDRVRawState),
@@ -513,6 +543,8 @@ BlockDriver bdrv_raw = {
     .bdrv_co_pwrite_zeroes = &raw_co_pwrite_zeroes,
     .bdrv_co_pdiscard     = &raw_co_pdiscard,
     .bdrv_co_block_status = &raw_co_block_status,
+    .bdrv_co_copy_range_from = &raw_co_copy_range_from,
+    .bdrv_co_copy_range_to  = &raw_co_copy_range_to,
     .bdrv_truncate        = &raw_truncate,
     .bdrv_getlength       = &raw_getlength,
     .has_variable_length  = true,