commit e644473445177671ec408dfdec705cf931657998
author Paolo Bonzini <pbonzini@redhat.com> Sun Nov 04 12:43:37 2012 +0100
committer Paolo Bonzini <pbonzini@redhat.com> Mon Nov 12 14:38:29 2012 +0100
tree 2dcdbfbb181138f0dd378f5f158a313ce11dbf0c
parent fc6467eaf22f974620b5dd046afca04e619f9be9

nbd: force read-only export for read-only devices

This is the desired behavior for HMP, but it is a better choice for QMP as well.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

blockdev-nbd.c

diff --git a/blockdev-nbd.c b/blockdev-nbd.c
index 274fba6..e362572 100644
--- a/blockdev-nbd.c
+++ b/blockdev-nbd.c
@@ -93,6 +93,13 @@
         return;
     }
 
+    if (!has_writable) {
+        writable = true;
+    }
+    if (bdrv_is_read_only(bs)) {
+        writable = false;
+    }
+
     exp = nbd_export_new(bs, 0, -1, writable ? 0 : NBD_FLAG_READ_ONLY,
                          nbd_server_put_ref);