[Qemu-devel] [V4 PATCH 2/5] net: announce self after vm start

[Jason Wang]

This patch moves qemu_announce_self() to vm_start() and add a new parameters to
control whether sending gratuitous packet is needed. There are several reasons
to do this:

- Gratuitous packet is also needed when we resume a stopped vm or successfully
  load a state.
- Sending gratuitous packets may be done through co-operation with guest, so
  this work should be done after vm is started.

Signed-off-by: Jason Wang <address@hidden>
---
 gdbstub.c   |    2 +-
 migration.c |    5 ++---
 monitor.c   |    2 +-
 qmp.c       |    2 +-
 savevm.c    |    2 +-
 sysemu.h    |    2 +-
 vl.c        |    7 +++++--
 7 files changed, 12 insertions(+), 10 deletions(-)

diff --git a/gdbstub.c b/gdbstub.c
index ef95ac2..f4d22e5 100644
--- a/gdbstub.c
+++ b/gdbstub.c
@@ -371,7 +371,7 @@ static inline void gdb_continue(GDBState *s)
 #ifdef CONFIG_USER_ONLY
     s->running_state = 1;
 #else
-    vm_start();
+    vm_start(false);
 #endif
 }
 
diff --git a/migration.c b/migration.c
index 00fa1e3..40332d2 100644
--- a/migration.c
+++ b/migration.c
@@ -88,14 +88,13 @@ void process_incoming_migration(QEMUFile *f)
         fprintf(stderr, "load of migration failed\n");
         exit(0);
     }
-    qemu_announce_self();
     DPRINTF("successfully loaded vm state\n");
 
     /* Make sure all file formats flush their mutable metadata */
     bdrv_invalidate_cache_all();
 
     if (autostart) {
-        vm_start();
+        vm_start(true);
     } else {
         runstate_set(RUN_STATE_PRELAUNCH);
     }
@@ -274,7 +273,7 @@ static void migrate_fd_put_ready(void *opaque)
         }
         if (s->state != MIG_STATE_COMPLETED) {
             if (old_vm_running) {
-                vm_start();
+                vm_start(false);
             }
         }
     }
diff --git a/monitor.c b/monitor.c
index cbdfbad..0b63c11 100644
--- a/monitor.c
+++ b/monitor.c
@@ -2260,7 +2260,7 @@ static void do_loadvm(Monitor *mon, const QDict *qdict)
     vm_stop(RUN_STATE_RESTORE_VM);
 
     if (load_vmstate(name) == 0 && saved_vm_running) {
-        vm_start();
+        vm_start(true);
     }
 }
 
diff --git a/qmp.c b/qmp.c
index a182b51..252c842 100644
--- a/qmp.c
+++ b/qmp.c
@@ -160,7 +160,7 @@ void qmp_cont(Error **errp)
         return;
     }
 
-    vm_start();
+    vm_start(true);
 }
 
 void qmp_system_wakeup(Error **errp)
diff --git a/savevm.c b/savevm.c
index 5b59826..82b9d3a 100644
--- a/savevm.c
+++ b/savevm.c
@@ -2107,7 +2107,7 @@ void do_savevm(Monitor *mon, const QDict *qdict)
 
  the_end:
     if (saved_vm_running)
-        vm_start();
+        vm_start(false);
 }
 
 int load_vmstate(const char *name)
diff --git a/sysemu.h b/sysemu.h
index 98118cc..787edd4 100644
--- a/sysemu.h
+++ b/sysemu.h
@@ -34,7 +34,7 @@ void vm_state_notify(int running, RunState state);
 #define VMRESET_SILENT   false
 #define VMRESET_REPORT   true
 
-void vm_start(void);
+void vm_start(bool announce);
 void vm_stop(RunState state);
 void vm_stop_force_state(RunState state);
 
diff --git a/vl.c b/vl.c
index 65f11f2..4e04f82 100644
--- a/vl.c
+++ b/vl.c
@@ -1258,7 +1258,7 @@ void vm_state_notify(int running, RunState state)
     }
 }
 
-void vm_start(void)
+void vm_start(bool announce)
 {
     if (!runstate_is_running()) {
         cpu_enable_ticks();
@@ -1266,6 +1266,9 @@ void vm_start(void)
         vm_state_notify(1, RUN_STATE_RUNNING);
         resume_all_vcpus();
         monitor_protocol_event(QEVENT_RESUME, NULL);
+        if (announce) {
+            qemu_announce_self();
+        }
     }
 }
 
@@ -3619,7 +3622,7 @@ int main(int argc, char **argv, char **envp)
             exit(ret);
         }
     } else if (autostart) {
-        vm_start();
+        vm_start(false);
     }
 
     os_setup_post();