diff --git a/block/block-backend.c b/block/block-backend.c
index 742efa7955..03bed68e4f 100644
--- a/block/block-backend.c
+++ b/block/block-backend.c
@@ -1424,6 +1424,27 @@ int coroutine_fn blk_co_pwritev(BlockBackend *blk, int64_t offset,
     return blk_co_pwritev_part(blk, offset, bytes, qiov, 0, flags);
 }
 
+int coroutine_fn blk_co_block_status_above(BlockBackend *blk,
+                                           BlockDriverState *base,
+                                           int64_t offset, int64_t bytes,
+                                           int64_t *pnum, int64_t *map,
+                                           BlockDriverState **file)
+{
+    IO_CODE();
+    return bdrv_co_block_status_above(blk_bs(blk), base, offset, bytes, pnum,
+                                      map, file);
+}
+
+int coroutine_fn blk_is_allocated_above(BlockBackend *blk,
+                                        BlockDriverState *base,
+                                        bool include_base, int64_t offset,
+                                        int64_t bytes, int64_t *pnum)
+{
+    IO_CODE();
+    return bdrv_co_is_allocated_above(blk_bs(blk), base, include_base, offset,
+                                      bytes, pnum);
+}
+
 typedef struct BlkRwCo {
     BlockBackend *blk;
     int64_t offset;
diff --git a/block/commit.c b/block/commit.c
index 0029b31944..9d4d908344 100644
--- a/block/commit.c
+++ b/block/commit.c
@@ -155,8 +155,8 @@ static int coroutine_fn commit_run(Job *job, Error **errp)
             break;
         }
         /* Copy if allocated above the base */
-        ret = bdrv_is_allocated_above(blk_bs(s->top), s->base_overlay, true,
-                                      offset, COMMIT_BUFFER_SIZE, &n);
+        ret = blk_is_allocated_above(s->top, s->base_overlay, true,
+                                     offset, COMMIT_BUFFER_SIZE, &n);
         copy = (ret > 0);
         trace_commit_one_iteration(s, offset, n, ret);
         if (copy) {
diff --git a/include/sysemu/block-backend-io.h b/include/sysemu/block-backend-io.h
index 50f5aa2e07..108be63628 100644
--- a/include/sysemu/block-backend-io.h
+++ b/include/sysemu/block-backend-io.h
@@ -92,6 +92,15 @@ int coroutine_fn blk_co_copy_range(BlockBackend *blk_in, int64_t off_in,
                                    int64_t bytes, BdrvRequestFlags read_flags,
                                    BdrvRequestFlags write_flags);
 
+int coroutine_fn blk_co_block_status_above(BlockBackend *blk,
+                                           BlockDriverState *base,
+                                           int64_t offset, int64_t bytes,
+                                           int64_t *pnum, int64_t *map,
+                                           BlockDriverState **file);
+int coroutine_fn blk_is_allocated_above(BlockBackend *blk,
+                                        BlockDriverState *base,
+                                        bool include_base, int64_t offset,
+                                        int64_t bytes, int64_t *pnum);
 
 /*
  * "I/O or GS" API functions. These functions can run without
diff --git a/nbd/server.c b/nbd/server.c
index 4af5c793a7..2663ea282f 100644
--- a/nbd/server.c
+++ b/nbd/server.c
@@ -1991,7 +1991,7 @@ static int coroutine_fn nbd_co_send_structured_error(NBDClient *client,
 }
 
 /* Do a sparse read and send the structured reply to the client.
- * Returns -errno if sending fails. bdrv_block_status_above() failure is
+ * Returns -errno if sending fails. blk_co_block_status_above() failure is
  * reported to the client, at which point this function succeeds.
  */
 static int coroutine_fn nbd_co_send_sparse_read(NBDClient *client,
@@ -2007,10 +2007,10 @@ static int coroutine_fn nbd_co_send_sparse_read(NBDClient *client,
 
     while (progress < size) {
         int64_t pnum;
-        int status = bdrv_block_status_above(blk_bs(exp->common.blk), NULL,
-                                             offset + progress,
-                                             size - progress, &pnum, NULL,
-                                             NULL);
+        int status = blk_co_block_status_above(exp->common.blk, NULL,
+                                               offset + progress,
+                                               size - progress, &pnum, NULL,
+                                               NULL);
         bool final;
 
         if (status < 0) {
@@ -2141,15 +2141,15 @@ static int nbd_extent_array_add(NBDExtentArray *ea,
     return 0;
 }
 
-static int coroutine_fn blockstatus_to_extents(BlockDriverState *bs,
+static int coroutine_fn blockstatus_to_extents(BlockBackend *blk,
                                                uint64_t offset, uint64_t bytes,
                                                NBDExtentArray *ea)
 {
     while (bytes) {
         uint32_t flags;
         int64_t num;
-        int ret = bdrv_co_block_status_above(bs, NULL, offset, bytes, &num,
-                                             NULL, NULL);
+        int ret = blk_co_block_status_above(blk, NULL, offset, bytes, &num,
+                                            NULL, NULL);
 
         if (ret < 0) {
             return ret;
@@ -2169,14 +2169,14 @@ static int coroutine_fn blockstatus_to_extents(BlockDriverState *bs,
     return 0;
 }
 
-static int coroutine_fn blockalloc_to_extents(BlockDriverState *bs,
+static int coroutine_fn blockalloc_to_extents(BlockBackend *blk,
                                               uint64_t offset, uint64_t bytes,
                                               NBDExtentArray *ea)
 {
     while (bytes) {
         int64_t num;
-        int ret = bdrv_co_is_allocated_above(bs, NULL, false, offset, bytes,
-                                             &num);
+        int ret = blk_is_allocated_above(blk, NULL, false, offset, bytes,
+                                         &num);
 
         if (ret < 0) {
             return ret;
@@ -2224,7 +2224,7 @@ static int nbd_co_send_extents(NBDClient *client, uint64_t handle,
 /* Get block status from the exported device and send it to the client */
 static int
 coroutine_fn nbd_co_send_block_status(NBDClient *client, uint64_t handle,
-                                      BlockDriverState *bs, uint64_t offset,
+                                      BlockBackend *blk, uint64_t offset,
                                       uint32_t length, bool dont_fragment,
                                       bool last, uint32_t context_id,
                                       Error **errp)
@@ -2234,9 +2234,9 @@ coroutine_fn nbd_co_send_block_status(NBDClient *client, uint64_t handle,
     g_autoptr(NBDExtentArray) ea = nbd_extent_array_new(nb_extents);
 
     if (context_id == NBD_META_ID_BASE_ALLOCATION) {
-        ret = blockstatus_to_extents(bs, offset, length, ea);
+        ret = blockstatus_to_extents(blk, offset, length, ea);
     } else {
-        ret = blockalloc_to_extents(bs, offset, length, ea);
+        ret = blockalloc_to_extents(blk, offset, length, ea);
     }
     if (ret < 0) {
         return nbd_co_send_structured_error(
@@ -2563,7 +2563,7 @@ static coroutine_fn int nbd_handle_request(NBDClient *client,
 
             if (client->export_meta.base_allocation) {
                 ret = nbd_co_send_block_status(client, request->handle,
-                                               blk_bs(exp->common.blk),
+                                               exp->common.blk,
                                                request->from,
                                                request->len, dont_fragment,
                                                !--contexts_remaining,
@@ -2576,7 +2576,7 @@ static coroutine_fn int nbd_handle_request(NBDClient *client,
 
             if (client->export_meta.allocation_depth) {
                 ret = nbd_co_send_block_status(client, request->handle,
-                                               blk_bs(exp->common.blk),
+                                               exp->common.blk,
                                                request->from, request->len,
                                                dont_fragment,
                                                !--contexts_remaining,
