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-rw-r--r--include/block/block.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/block/block.h b/include/block/block.h
index f374e1a..e18233a 100644
--- a/include/block/block.h
+++ b/include/block/block.h
@@ -107,6 +107,7 @@ typedef struct HDGeometry {
#define BDRV_OPT_CACHE_WB "cache.writeback"
#define BDRV_OPT_CACHE_DIRECT "cache.direct"
#define BDRV_OPT_CACHE_NO_FLUSH "cache.no-flush"
+#define BDRV_OPT_READ_ONLY "read-only"
#define BDRV_SECTOR_BITS 9