[Xen-changelog] [xen-unstable] libxl: refuse to try and migrate an HVM guest using qemu-xen

[Xen patchbot-unstable <patchbot@xxxxxxx>]

# HG changeset patch
# User Ian Campbell <Ian.Campbell@xxxxxxxxxx>
# Date 1343234354 -3600
# Node ID d35e84ac821dea78667d81d6d75a69f946b09a76
# Parent  2fb65af3e859ac8d07c1dae4dc033948b0776f24
libxl: refuse to try and migrate an HVM guest using qemu-xen

libxl/qemu-upstream currently do not collude together to enable log-dirty mode
and therefore migrations are unsafe. Refuse to even try for now.

Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
Acked-by: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
Committed-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
---


diff -r 2fb65af3e859 -r d35e84ac821d tools/libxl/libxl.c
--- a/tools/libxl/libxl.c       Tue Jul 24 10:29:18 2012 +0100
+++ b/tools/libxl/libxl.c       Wed Jul 25 17:39:14 2012 +0100
@@ -765,6 +765,23 @@ int libxl_domain_suspend(libxl_ctx *ctx,
         goto out_err;
     }
 
+    if (type == LIBXL_DOMAIN_TYPE_HVM && flags & LIBXL_SUSPEND_LIVE) {
+        switch (libxl__device_model_version_running(gc, domid)) {
+        case LIBXL_DEVICE_MODEL_VERSION_QEMU_XEN:
+            LOG(ERROR,
+                "cannot live migrate HVM domains with qemu-xen device-model");
+            rc = ERROR_FAIL;
+            goto out_err;
+        case LIBXL_DEVICE_MODEL_VERSION_QEMU_XEN_TRADITIONAL:
+            /* No problem */
+            break;
+        case -1:
+            rc = ERROR_FAIL;
+            goto out_err;
+        default: abort();
+        }
+    }
+
     libxl__domain_suspend_state *dss;
     GCNEW(dss);
 

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