diff --git a/block/block-backend.c b/block/block-backend.c
index bfb041823e..48b6e4c05c 100644
--- a/block/block-backend.c
+++ b/block/block-backend.c
@@ -892,3 +892,13 @@ int blk_load_vmstate(BlockBackend *blk, uint8_t *buf, int64_t pos, int size)
 {
     return bdrv_load_vmstate(blk->bs, buf, pos, size);
 }
+
+int blk_probe_blocksizes(BlockBackend *blk, BlockSizes *bsz)
+{
+    return bdrv_probe_blocksizes(blk->bs, bsz);
+}
+
+int blk_probe_geometry(BlockBackend *blk, HDGeometry *geo)
+{
+    return bdrv_probe_geometry(blk->bs, geo);
+}
diff --git a/include/sysemu/block-backend.h b/include/sysemu/block-backend.h
index 3ff9aeeb09..77e9b9c370 100644
--- a/include/sysemu/block-backend.h
+++ b/include/sysemu/block-backend.h
@@ -164,5 +164,7 @@ int blk_discard(BlockBackend *blk, int64_t sector_num, int nb_sectors);
 int blk_save_vmstate(BlockBackend *blk, const uint8_t *buf,
                      int64_t pos, int size);
 int blk_load_vmstate(BlockBackend *blk, uint8_t *buf, int64_t pos, int size);
+int blk_probe_blocksizes(BlockBackend *blk, BlockSizes *bsz);
+int blk_probe_geometry(BlockBackend *blk, HDGeometry *geo);
 
 #endif