[v3,08/10] block: Use common req handling in copy offloading

Commit Message

Fam Zheng July 10, 2018, 6:31 a.m. UTC

This brings the request handling logic inline with write and discard,
fixing write_gen, resize_cb, dirty bitmaps and image size refreshing.
The last of these issues broke iotest case 222, which is now fixed.

Signed-off-by: Fam Zheng <[e-mail]>
---
 block/io.c | 22 +++++++++-------------
 1 file changed, 9 insertions(+), 13 deletions(-)

Patch

diff --git a/block/io.c b/block/io.c
index cc426bab2e..9687da1ce9 100644
--- a/block/io.c
+++ b/block/io.c
@@ -3007,20 +3007,16 @@  static int coroutine_fn bdrv_co_copy_range_internal(
         bdrv_inc_in_flight(dst->bs);
         tracked_request_begin(&req, dst->bs, dst_offset, bytes,
                               BDRV_TRACKED_WRITE);
-
-        /* BDRV_REQ_NO_SERIALISING is only for read operation */
-        assert(!(write_flags & BDRV_REQ_NO_SERIALISING));
-        if (write_flags & BDRV_REQ_SERIALISING) {
-            mark_request_serialising(&req, bdrv_get_cluster_size(dst->bs));
+        ret = bdrv_co_write_req_prepare(dst, dst_offset, bytes, &req,
+                                        write_flags);
+        if (!ret) {
+            ret = dst->bs->drv->bdrv_co_copy_range_to(dst->bs,
+                                                      src, src_offset,
+                                                      dst, dst_offset,
+                                                      bytes,
+                                                      read_flags, write_flags);
         }
-        wait_serialising_requests(&req);
-
-        ret = dst->bs->drv->bdrv_co_copy_range_to(dst->bs,
-                                                  src, src_offset,
-                                                  dst, dst_offset,
-                                                  bytes,
-                                                  read_flags, write_flags);
-
+        bdrv_co_write_req_finish(dst, dst_offset, bytes, &req, ret);
         tracked_request_end(&req);
         bdrv_dec_in_flight(dst->bs);
     }