From 7aa9c811ca0761918a0252d0f923a80224953fa6 Mon Sep 17 00:00:00 2001
From: Markus Armbruster <armbru@redhat.com>
Date: Mon, 28 Jun 2010 19:10:36 +0200
Subject: [PATCH] ide: Reject readonly drives unless CD-ROM

drive_init() doesn't permit option readonly for if=ide, but that's
worthless: we get it via if=none and -device.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
---
 hw/ide/core.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/hw/ide/core.c b/hw/ide/core.c
index dbb7accca0..3b84bea5cf 100644
--- a/hw/ide/core.c
+++ b/hw/ide/core.c
@@ -2617,6 +2617,11 @@ int ide_init_drive(IDEState *s, BlockDriverState *bs,
     if (bdrv_get_type_hint(bs) == BDRV_TYPE_CDROM) {
         s->drive_kind = IDE_CD;
         bdrv_set_change_cb(bs, cdrom_change_cb, s);
+    } else {
+        if (bdrv_is_read_only(bs)) {
+            error_report("Can't use a read-only drive");
+            return -1;
+        }
     }
     if (serial) {
         strncpy(s->drive_serial_str, serial, sizeof(s->drive_serial_str));