[Qemu-devel] [PATCH 6/9] block: pass qiov into before_write notifier

["Denis V. Lunev" <den@openvz.org>]

Signed-off-by: Denis V. Lunev <den@openvz.org>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
CC: Stefan Hajnoczi <stefanha@redhat.com>
CC: Fam Zheng <famz@redhat.com>
CC: Kevin Wolf <kwolf@redhat.com>
CC: Max Reitz <mreitz@redhat.com>
CC: Jeff Cody <jcody@redhat.com>
CC: Eric Blake <eblake@redhat.com>
---
 block/io.c                | 12 +++++++-----
 include/block/block_int.h |  1 +
 2 files changed, 8 insertions(+), 5 deletions(-)

diff --git a/block/io.c b/block/io.c
index 2d832aa..d2ad09c 100644
--- a/block/io.c
+++ b/block/io.c
@@ -368,12 +368,14 @@ static void tracked_request_end(BdrvTrackedRequest *req)
  */
 static void tracked_request_begin(BdrvTrackedRequest *req,
                                   BlockDriverState *bs,
+                                  QEMUIOVector *qiov,
                                   int64_t offset,
                                   unsigned int bytes,
                                   enum BdrvTrackedRequestType type)
 {
     *req = (BdrvTrackedRequest){
         .bs = bs,
+        .qiov           = qiov,
         .offset         = offset,
         .bytes          = bytes,
         .type           = type,
@@ -1073,7 +1075,7 @@ int coroutine_fn bdrv_co_preadv(BlockDriverState *bs,
         bytes = ROUND_UP(bytes, align);
     }
 
-    tracked_request_begin(&req, bs, offset, bytes, BDRV_TRACKED_READ);
+    tracked_request_begin(&req, bs, NULL, offset, bytes, BDRV_TRACKED_READ);
     ret = bdrv_aligned_preadv(bs, &req, offset, bytes, align,
                               use_local_qiov ? &local_qiov : qiov,
                               flags);
@@ -1391,7 +1393,7 @@ int coroutine_fn bdrv_co_pwritev(BlockDriverState *bs,
      * Pad qiov with the read parts and be sure to have a tracked request not
      * only for bdrv_aligned_pwritev, but also for the reads of the RMW cycle.
      */
-    tracked_request_begin(&req, bs, offset, bytes, BDRV_TRACKED_WRITE);
+    tracked_request_begin(&req, bs, qiov, offset, bytes, BDRV_TRACKED_WRITE);
 
     if (!qiov) {
         ret = bdrv_co_do_zero_pwritev(bs, offset, bytes, flags, &req);
@@ -2098,7 +2100,7 @@ int coroutine_fn bdrv_co_flush(BlockDriverState *bs)
         return 0;
     }
 
-    tracked_request_begin(&req, bs, 0, 0, BDRV_TRACKED_FLUSH);
+    tracked_request_begin(&req, bs, NULL, 0, 0, BDRV_TRACKED_FLUSH);
 
     /* Write back all layers by calling one driver function */
     if (bs->drv->bdrv_co_flush) {
@@ -2228,7 +2230,7 @@ int coroutine_fn bdrv_co_discard(BlockDriverState *bs, int64_t sector_num,
         return 0;
     }
 
-    tracked_request_begin(&req, bs, sector_num, nb_sectors,
+    tracked_request_begin(&req, bs, NULL, sector_num, nb_sectors,
                           BDRV_TRACKED_DISCARD);
     bdrv_set_dirty(bs, sector_num, nb_sectors);
 
@@ -2331,7 +2333,7 @@ static int bdrv_co_do_ioctl(BlockDriverState *bs, int req, void *buf)
     };
     BlockAIOCB *acb;
 
-    tracked_request_begin(&tracked_req, bs, 0, 0, BDRV_TRACKED_IOCTL);
+    tracked_request_begin(&tracked_req, bs, NULL, 0, 0, BDRV_TRACKED_IOCTL);
     if (!drv || !drv->bdrv_aio_ioctl) {
         co.ret = -ENOTSUP;
         goto out;
diff --git a/include/block/block_int.h b/include/block/block_int.h
index 30a9717..72f463a 100644
--- a/include/block/block_int.h
+++ b/include/block/block_int.h
@@ -69,6 +69,7 @@ enum BdrvTrackedRequestType {
 
 typedef struct BdrvTrackedRequest {
     BlockDriverState *bs;
+    QEMUIOVector *qiov;
     int64_t offset;
     unsigned int bytes;
     enum BdrvTrackedRequestType type;
-- 
2.5.0