[Qemu-devel] [PATCH v2 3/8] RunState: added two new flags for bitmap dump and migration process

[Sanidhya Kashyap <sanidhya.iiith@gmail.com>]

I have added two new flags - RUN_STATE_MIGRATE and RUN_STATE_DUMP_BITMAP.
These both flags behave same as RUN_STATE_RUNNING flag. The purpose of
introducing these flags is to avoid running both migration and dump bitmap
process simultaneously.

I haven't added many transitions to the RUN_STATE_DUMP_BITMAP. I will try
to include the transitions on the basis of discussions.

On the other hand, I have tried to add the transitions that might occur during
the migration process. There is a possibility that some transitions can be
redundant (as pointed by Chen, this is not my patch problem,  but I have tried
to cover what I thought is necessary).

Signed-off-by: Sanidhya Kashyap <sanidhya.iiith@gmail.com>
---
 qapi-schema.json |  7 ++++++-
 vl.c             | 29 ++++++++++++++++++++++++++++-
 2 files changed, 34 insertions(+), 2 deletions(-)

diff --git a/qapi-schema.json b/qapi-schema.json
index 17e5147..2918fc4 100644
--- a/qapi-schema.json
+++ b/qapi-schema.json
@@ -234,12 +234,17 @@
 # @watchdog: the watchdog action is configured to pause and has been triggered
 #
 # @guest-panicked: guest has been panicked as a result of guest OS panic
+#
+# @migrate: migration process is being executed
+#
+# @dump-bitmap: dump the writable working set of the guest
+#
 ##
 { 'enum': 'RunState',
   'data': [ 'debug', 'inmigrate', 'internal-error', 'io-error', 'paused',
             'postmigrate', 'prelaunch', 'finish-migrate', 'restore-vm',
             'running', 'save-vm', 'shutdown', 'suspended', 'watchdog',
-            'guest-panicked' ] }
+            'guest-panicked', 'migrate', 'dump-bitmap' ] }
 
 ##
 # @SnapshotInfo
diff --git a/vl.c b/vl.c
index 709d8cd..a2ffd66 100644
--- a/vl.c
+++ b/vl.c
@@ -576,31 +576,39 @@ static const RunStateTransition runstate_transitions_def[] = {
     /*     from      ->     to      */
     { RUN_STATE_DEBUG, RUN_STATE_RUNNING },
     { RUN_STATE_DEBUG, RUN_STATE_FINISH_MIGRATE },
+    { RUN_STATE_DEBUG, RUN_STATE_MIGRATE },
 
     { RUN_STATE_INMIGRATE, RUN_STATE_RUNNING },
     { RUN_STATE_INMIGRATE, RUN_STATE_PAUSED },
 
     { RUN_STATE_INTERNAL_ERROR, RUN_STATE_PAUSED },
     { RUN_STATE_INTERNAL_ERROR, RUN_STATE_FINISH_MIGRATE },
+    { RUN_STATE_INTERNAL_ERROR, RUN_STATE_MIGRATE },
 
     { RUN_STATE_IO_ERROR, RUN_STATE_RUNNING },
     { RUN_STATE_IO_ERROR, RUN_STATE_FINISH_MIGRATE },
+    { RUN_STATE_IO_ERROR, RUN_STATE_MIGRATE },
 
     { RUN_STATE_PAUSED, RUN_STATE_RUNNING },
     { RUN_STATE_PAUSED, RUN_STATE_FINISH_MIGRATE },
+    { RUN_STATE_PAUSED, RUN_STATE_MIGRATE },
 
     { RUN_STATE_POSTMIGRATE, RUN_STATE_RUNNING },
     { RUN_STATE_POSTMIGRATE, RUN_STATE_FINISH_MIGRATE },
+    { RUN_STATE_POSTMIGRATE, RUN_STATE_MIGRATE },
 
     { RUN_STATE_PRELAUNCH, RUN_STATE_RUNNING },
     { RUN_STATE_PRELAUNCH, RUN_STATE_FINISH_MIGRATE },
     { RUN_STATE_PRELAUNCH, RUN_STATE_INMIGRATE },
+    { RUN_STATE_PRELAUNCH, RUN_STATE_MIGRATE },
 
     { RUN_STATE_FINISH_MIGRATE, RUN_STATE_RUNNING },
     { RUN_STATE_FINISH_MIGRATE, RUN_STATE_POSTMIGRATE },
 
     { RUN_STATE_RESTORE_VM, RUN_STATE_RUNNING },
 
+    { RUN_STATE_DUMP_BITMAP, RUN_STATE_RUNNING},
+
     { RUN_STATE_RUNNING, RUN_STATE_DEBUG },
     { RUN_STATE_RUNNING, RUN_STATE_INTERNAL_ERROR },
     { RUN_STATE_RUNNING, RUN_STATE_IO_ERROR },
@@ -611,6 +619,8 @@ static const RunStateTransition runstate_transitions_def[] = {
     { RUN_STATE_RUNNING, RUN_STATE_SHUTDOWN },
     { RUN_STATE_RUNNING, RUN_STATE_WATCHDOG },
     { RUN_STATE_RUNNING, RUN_STATE_GUEST_PANICKED },
+    { RUN_STATE_RUNNING, RUN_STATE_DUMP_BITMAP },
+    { RUN_STATE_RUNNING, RUN_STATE_MIGRATE },
 
     { RUN_STATE_SAVE_VM, RUN_STATE_RUNNING },
 
@@ -621,12 +631,27 @@ static const RunStateTransition runstate_transitions_def[] = {
     { RUN_STATE_RUNNING, RUN_STATE_SUSPENDED },
     { RUN_STATE_SUSPENDED, RUN_STATE_RUNNING },
     { RUN_STATE_SUSPENDED, RUN_STATE_FINISH_MIGRATE },
+    { RUN_STATE_SUSPENDED, RUN_STATE_MIGRATE },
 
     { RUN_STATE_WATCHDOG, RUN_STATE_RUNNING },
     { RUN_STATE_WATCHDOG, RUN_STATE_FINISH_MIGRATE },
+    { RUN_STATE_WATCHDOG, RUN_STATE_MIGRATE },
 
     { RUN_STATE_GUEST_PANICKED, RUN_STATE_RUNNING },
     { RUN_STATE_GUEST_PANICKED, RUN_STATE_FINISH_MIGRATE },
+    { RUN_STATE_GUEST_PANICKED, RUN_STATE_MIGRATE },
+
+    { RUN_STATE_DUMP_BITMAP, RUN_STATE_RUNNING },
+
+    { RUN_STATE_MIGRATE, RUN_STATE_POSTMIGRATE },
+    { RUN_STATE_MIGRATE, RUN_STATE_PAUSED },
+    { RUN_STATE_MIGRATE, RUN_STATE_SHUTDOWN },
+    { RUN_STATE_MIGRATE, RUN_STATE_GUEST_PANICKED },
+    { RUN_STATE_MIGRATE, RUN_STATE_DEBUG },
+    { RUN_STATE_MIGRATE, RUN_STATE_RUNNING },
+    { RUN_STATE_MIGRATE, RUN_STATE_INTERNAL_ERROR },
+    { RUN_STATE_MIGRATE, RUN_STATE_IO_ERROR },
+    { RUN_STATE_MIGRATE, RUN_STATE_WATCHDOG },
 
     { RUN_STATE_MAX, RUN_STATE_MAX },
 };
@@ -666,7 +691,9 @@ void runstate_set(RunState new_state)
 
 int runstate_is_running(void)
 {
-    return runstate_check(RUN_STATE_RUNNING);
+    return (runstate_check(RUN_STATE_RUNNING) ||
+            runstate_check(RUN_STATE_MIGRATE) ||
+            runstate_check(RUN_STATE_DUMP_BITMAP));
 }
 
 bool runstate_needs_reset(void)
-- 
1.8.3.1