From: Paolo Bonzini <pbonzini@redhat.com>
Date: Sun, 4 Nov 2012 11:43:37 +0000 (+0100)
Subject: nbd: force read-only export for read-only devices
X-Git-Tag: TizenStudio_2.0_p2.3.2~208^2~2970^2~5
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=e644473445177671ec408dfdec705cf931657998;p=sdk%2Femulator%2Fqemu.git

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>
---

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 @@ void qmp_nbd_server_add(const char *device, bool has_writable, bool writable,
         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);