From fa166538743d4e28de7374c41332c3e448826f4b Mon Sep 17 00:00:00 2001
From: Eric Blake <eblake@redhat.com>
Date: Mon, 13 Jun 2016 12:56:35 -0600
Subject: block: Assert that flags are in range

Add a new BDRV_REQ_MASK constant, and use it to make sure that
caller flags are always valid.

Tested with 'make check' and with qemu-iotests on both '-raw'
and '-qcow2'; the only failure turned up was fixed in the
previous commit.

Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
---
 include/block/block.h | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'include/block/block.h')

diff --git a/include/block/block.h b/include/block/block.h
index 54cca28..8cabcdd 100644
--- a/include/block/block.h
+++ b/include/block/block.h
@@ -65,6 +65,9 @@ typedef enum {
     BDRV_REQ_MAY_UNMAP          = 0x4,
     BDRV_REQ_NO_SERIALISING     = 0x8,
     BDRV_REQ_FUA                = 0x10,
+
+    /* Mask of valid flags */
+    BDRV_REQ_MASK               = 0x1f,
 } BdrvRequestFlags;
 
 typedef struct BlockSizes {
-- 
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