Similar to migration_channels_and_transport_compatible(), introduce a
new helper migration_capabilities_and_transport_compatible() to check if
the capabilites is compatible with the transport.

Currently, only move the capabilities vs RDMA transport to this
function.

Signed-off-by: Li Zhijian <lizhijian@fujitsu.com>
---
 migration/migration.c | 36 ++++++++++++++++++++++++++----------
 1 file changed, 26 insertions(+), 10 deletions(-)

diff --git a/migration/migration.c b/migration/migration.c
index c597aa707e5..2eacae25e0e 100644
--- a/migration/migration.c
+++ b/migration/migration.c
@@ -238,6 +238,30 @@ migration_channels_and_transport_compatible(MigrationAddress *addr,
     return true;
 }
 
+static bool
+migration_capabilities_and_transport_compatible(MigrationAddress *addr,
+                                                Error **errp)
+{
+    if (addr->transport == MIGRATION_ADDRESS_TYPE_RDMA) {
+        if (migrate_xbzrle()) {
+            error_setg(errp, "RDMA and XBZRLE can't be used together");
+            return false;
+        }
+        if (migrate_multifd()) {
+            error_setg(errp, "RDMA and multifd can't be used together");
+            return false;
+        }
+    }
+
+    return true;
+}
+
+static bool migration_transport_compatible(MigrationAddress *addr, Error **errp)
+{
+    return migration_channels_and_transport_compatible(addr, errp) &&
+           migration_capabilities_and_transport_compatible(addr, errp);
+}
+
 static gint page_request_addr_cmp(gconstpointer ap, gconstpointer bp)
 {
     uintptr_t a = (uintptr_t) ap, b = (uintptr_t) bp;
@@ -716,7 +740,7 @@ static void qemu_start_incoming_migration(const char *uri, bool has_channels,
     }
 
     /* transport mechanism not suitable for migration? */
-    if (!migration_channels_and_transport_compatible(addr, errp)) {
+    if (!migration_transport_compatible(addr, errp)) {
         return;
     }
 
@@ -735,14 +759,6 @@ static void qemu_start_incoming_migration(const char *uri, bool has_channels,
         }
 #ifdef CONFIG_RDMA
     } else if (addr->transport == MIGRATION_ADDRESS_TYPE_RDMA) {
-        if (migrate_xbzrle()) {
-            error_setg(errp, "RDMA and XBZRLE can't be used together");
-            return;
-        }
-        if (migrate_multifd()) {
-            error_setg(errp, "RDMA and multifd can't be used together");
-            return;
-        }
         rdma_start_incoming_migration(&addr->u.rdma, errp);
 #endif
     } else if (addr->transport == MIGRATION_ADDRESS_TYPE_EXEC) {
@@ -2159,7 +2175,7 @@ void qmp_migrate(const char *uri, bool has_channels,
     }
 
     /* transport mechanism not suitable for migration? */
-    if (!migration_channels_and_transport_compatible(addr, errp)) {
+    if (!migration_transport_compatible(addr, errp)) {
         return;
     }
 
-- 
2.44.0