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-rw-r--r--include/block/block.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/include/block/block.h b/include/block/block.h
index f7680b6e68..5f3c2de59c 100644
--- a/include/block/block.h
+++ b/include/block/block.h
@@ -90,6 +90,14 @@ typedef struct HDGeometry {
#define BDRV_O_CACHE_MASK (BDRV_O_NOCACHE | BDRV_O_CACHE_WB | BDRV_O_NO_FLUSH)
+
+/* Option names of options parsed by the block layer */
+
+#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_SECTOR_BITS 9
#define BDRV_SECTOR_SIZE (1ULL << BDRV_SECTOR_BITS)
#define BDRV_SECTOR_MASK ~(BDRV_SECTOR_SIZE - 1)