stream: move is_allocated_above to block.c

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

1 files changed, 2 insertions, 51 deletions

diff --git a/block/stream.c b/block/stream.c
index 4490a25ba2..811388a402 100644
--- a/block/stream.c
+++ b/block/stream.c
@@ -98,55 +98,6 @@ static void close_unused_images(BlockDriverState *top, BlockDriverState *base,
     top->backing_hd = base;
 }
 
-/*
- * Given an image chain: [BASE] -> [INTER1] -> [INTER2] -> [TOP]
- *
- * Return true if the given sector is allocated in any image between
- * BASE and TOP (inclusive).  BASE can be NULL to check if the given
- * sector is allocated in any image of the chain.  Return false otherwise.
- *
- * 'pnum' is set to the number of sectors (including and immediately following
- *  the specified sector) that are known to be in the same
- *  allocated/unallocated state.
- *
- */
-static int coroutine_fn is_allocated_above(BlockDriverState *top,
-                                           BlockDriverState *base,
-                                           int64_t sector_num,
-                                           int nb_sectors, int *pnum)
-{
-    BlockDriverState *intermediate;
-    int ret, n = nb_sectors;
-
-    intermediate = top;
-    while (intermediate != base) {
-        int pnum_inter;
-        ret = bdrv_co_is_allocated(intermediate, sector_num, nb_sectors,
-                                   &pnum_inter);
-        if (ret < 0) {
-            return ret;
-        } else if (ret) {
-            *pnum = pnum_inter;
-            return 1;
-        }
-
-        /*
-         * [sector_num, nb_sectors] is unallocated on top but intermediate
-         * might have
-         *
-         * [sector_num+x, nr_sectors] allocated.
-         */
-        if (n > pnum_inter) {
-            n = pnum_inter;
-        }
-
-        intermediate = intermediate->backing_hd;
-    }
-
-    *pnum = n;
-    return 0;
-}
-
 static void coroutine_fn stream_run(void *opaque)
 {
     StreamBlockJob *s = opaque;
@@ -196,10 +147,10 @@ wait:
         } else {
             /* Copy if allocated in the intermediate images.  Limit to the
              * known-unallocated area [sector_num, sector_num+n).  */
-            ret = is_allocated_above(bs->backing_hd, base, sector_num, n, &n);
+            ret = bdrv_co_is_allocated_above(bs->backing_hd, base,
+                                             sector_num, n, &n);
             copy = (ret == 1);
         }
-
         trace_stream_one_iteration(s, sector_num, n, ret);
         if (ret >= 0 && copy) {
             if (s->common.speed) {