From c8f6d58edb0defbe1e90d44419ec8ec6d711c341 Mon Sep 17 00:00:00 2001
From: Kevin Wolf <kwolf@redhat.com>
Date: Fri, 17 Feb 2017 14:52:00 +0100
Subject: block: Assertions for resize permission

This adds an assertion that ensures that the necessary resize permission
has been granted before bdrv_truncate() is called.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Acked-by: Fam Zheng <famz@redhat.com>
---
 block.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'block.c')

diff --git a/block.c b/block.c
index 79d9ad0..74ac7dc 100644
--- a/block.c
+++ b/block.c
@@ -3122,6 +3122,9 @@ int bdrv_truncate(BdrvChild *child, int64_t offset)
     BlockDriverState *bs = child->bs;
     BlockDriver *drv = bs->drv;
     int ret;
+
+    assert(child->perm & BLK_PERM_RESIZE);
+
     if (!drv)
         return -ENOMEDIUM;
     if (!drv->bdrv_truncate)
-- 
cgit v1.1