[PATCH v2 18/23] qemu-migration: prevent migration if slirp cannot be migrated

[marcandre.lureau@xxxxxxxxxx]

From: Marc-André Lureau <marcandre.lureau@xxxxxxxxxx>

Signed-off-by: Marc-André Lureau <marcandre.lureau@xxxxxxxxxx>
---
 src/qemu/qemu_migration.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/src/qemu/qemu_migration.c b/src/qemu/qemu_migration.c
index 86b4bfd970..c607e9f909 100644
--- a/src/qemu/qemu_migration.c
+++ b/src/qemu/qemu_migration.c
@@ -39,6 +39,7 @@
 #include "qemu_hotplug.h"
 #include "qemu_blockjob.h"
 #include "qemu_security.h"
+#include "qemu_slirp.h"
 #include "qemu_block.h"
 
 #include "domain_audit.h"
@@ -1150,6 +1151,17 @@ qemuMigrationSrcIsAllowed(virQEMUDriverPtr driver,
         return false;
     }
 
+    for (i = 0; i < vm->def->nnets; i++) {
+        virDomainNetDefPtr net = vm->def->nets[i];
+        qemuSlirpPtr slirp = QEMU_DOMAIN_NETWORK_PRIVATE(net)->slirp;
+
+        if (slirp && !qemuSlirpHasFeature(slirp, QEMU_SLIRP_FEATURE_MIGRATE)) {
+            virReportError(VIR_ERR_OPERATION_INVALID, "%s",
+                           _("a slirp-helper cannot be migrated"));
+            return false;
+        }
+    }
+
     /* following checks don't make sense for offline migration */
     if (!(flags & VIR_MIGRATE_OFFLINE)) {
         if (qemuProcessAutoDestroyActive(driver, vm)) {
-- 
2.23.0.rc1

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