From 0e48a34df1ebd61f5fd0e914d638de2646b09635 Mon Sep 17 00:00:00 2001
From: Kevin Wolf <kwolf@redhat.com>
Date: Fri, 23 Nov 2018 10:41:43 +0100
Subject: [PATCH 02/34] block: Update flags in bdrv_set_read_only()

RH-Author: Kevin Wolf <kwolf@redhat.com>
Message-id: <20181123104154.13541-2-kwolf@redhat.com>
Patchwork-id: 83110
O-Subject: [RHEL-7.7/7.6.z qemu-kvm-rhev PATCH v2 01/12] block: Update flags in bdrv_set_read_only()
Bugzilla: 1623986
RH-Acked-by: Max Reitz <mreitz@redhat.com>
RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
RH-Acked-by: John Snow <jsnow@redhat.com>

To fully change the read-only state of a node, we must not only change
bs->read_only, but also update bs->open_flags.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Alberto Garcia <berto@igalia.com>
(cherry picked from commit eeae6a596b0efc092f5101c67683053e245e6250)
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
---
 block.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/block.c b/block.c
index fbd569c..d3ea21a 100644
--- a/block.c
+++ b/block.c
@@ -281,6 +281,13 @@ int bdrv_set_read_only(BlockDriverState *bs, bool read_only, Error **errp)
     }
 
     bs->read_only = read_only;
+
+    if (read_only) {
+        bs->open_flags &= ~BDRV_O_RDWR;
+    } else {
+        bs->open_flags |= BDRV_O_RDWR;
+    }
+
     return 0;
 }
 
-- 
1.8.3.1