[Qemu-block] [PATCH v15 02/21] block: Define BLK_PERM_MAX

[Fam Zheng]

This is the order of the largest possible permission.

Signed-off-by: Fam Zheng <f...@redhat.com>
---
 include/block/block.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/block/block.h b/include/block/block.h
index eb0565d..a798f10 100644
--- a/include/block/block.h
+++ b/include/block/block.h
@@ -224,6 +224,8 @@ enum {
     BLK_PERM_ALL                = 0x1f,
 };
 
+#define BLK_PERM_MAX (64 - clz64((uint64_t)BLK_PERM_ALL))
+
 char *bdrv_perm_names(uint64_t perm);
 
 /* disk I/O throttling */
-- 
2.9.3