From b196b1532f2981e9c811c96214a44ee9e7d12af3 Mon Sep 17 00:00:00 2001
From: Naphtali Sprei <nsprei@redhat.com>
Date: Sun, 17 Jan 2010 16:48:12 +0200
Subject: [PATCH] Make CDROM a read-only drive

Signed-off-by: Naphtali Sprei <nsprei@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
---
 vl.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/vl.c b/vl.c
index 06cb40df5c..76ef8ca4f2 100644
--- a/vl.c
+++ b/vl.c
@@ -2233,6 +2233,13 @@ DriveInfo *drive_init(QemuOpts *opts, void *opaque,
         }
         (void)bdrv_set_read_only(dinfo->bdrv, 1);
     }
+    /* 
+     * cdrom is read-only. Set it now, after above interface checking
+     * since readonly attribute not explicitly required, so no error.
+     */
+    if (media == MEDIA_CDROM) {
+        (void)bdrv_set_read_only(dinfo->bdrv, 1);
+    }
 
     if (bdrv_open2(dinfo->bdrv, file, bdrv_flags, drv) < 0) {
         fprintf(stderr, "qemu: could not open disk image %s: %s\n",
-- 
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