From 1676fffaadd06b727683896e406146dc066baf86 Mon Sep 17 00:00:00 2001
From: Rob Bradford <robert.bradford@intel.com>
Date: Fri, 14 Jan 2022 09:23:30 +0000
Subject: [PATCH] vmm: Check shared memory is enabled for local migration

This is required so that the receiving process can access the existing
process's memory.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
---
 vmm/src/lib.rs | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/vmm/src/lib.rs b/vmm/src/lib.rs
index 3510503d1..3e93848b4 100644
--- a/vmm/src/lib.rs
+++ b/vmm/src/lib.rs
@@ -1153,6 +1153,22 @@ impl Vmm {
             "Sending migration: destination_url = {}, local = {}",
             send_data_migration.destination_url, send_data_migration.local
         );
+
+        if !self
+            .vm_config
+            .as_ref()
+            .unwrap()
+            .lock()
+            .unwrap()
+            .memory
+            .shared
+            && send_data_migration.local
+        {
+            return Err(MigratableError::MigrateSend(anyhow!(
+                "Local migration requires shared memory enabled"
+            )));
+        }
+
         if let Some(vm) = self.vm.as_mut() {
             Self::send_migration(
                 vm,