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-rw-r--r--include/block/block.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/block/block.h b/include/block/block.h
index 3082d2b80e..25a6d62d1b 100644
--- a/include/block/block.h
+++ b/include/block/block.h
@@ -83,6 +83,9 @@ typedef enum {
 #define BDRV_SECTOR_SIZE   (1ULL << BDRV_SECTOR_BITS)
 #define BDRV_SECTOR_MASK   ~(BDRV_SECTOR_SIZE - 1)
 
+#define BDRV_REQUEST_MAX_SECTORS MIN(SIZE_MAX >> BDRV_SECTOR_BITS, \
+                                     INT_MAX >> BDRV_SECTOR_BITS)
+
 /*
  * Allocation status flags
  * BDRV_BLOCK_DATA: data is read from bs->file or another file