migration: Convert 'status' of MigrationInfo to use an enum type

The original 'status' is an open-coded 'str' type, convert it to use an
enum type.
This conversion is backwards compatible, better documented and
more convenient for future extensibility.

In addition, Fix a typo for qapi-schema.json (just remove the typo) :
s/'completed'. 'comppleted' (since 1.2)/'completed' (since 1.2)

Signed-off-by: zhanghailiang <zhang.zhanghailiang@huawei.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>

1 files changed, 5 insertions, 15 deletions

diff --git a/migration/migration.c b/migration/migration.c
index b0860fa5c1..d7a1e7d2a3 100644
--- a/migration/migration.c
+++ b/migration/migration.c
@@ -26,16 +26,6 @@
 #include "qmp-commands.h"
 #include "trace.h"
 
-enum {
-    MIGRATION_STATUS_FAILED = -1,
-    MIGRATION_STATUS_NONE,
-    MIGRATION_STATUS_SETUP,
-    MIGRATION_STATUS_CANCELLING,
-    MIGRATION_STATUS_CANCELLED,
-    MIGRATION_STATUS_ACTIVE,
-    MIGRATION_STATUS_COMPLETED,
-};
-
 #define MAX_THROTTLE  (32 << 20)      /* Migration speed throttling */
 
 /* Amount of time to allocate to each "chunk" of bandwidth-throttled
@@ -205,13 +195,13 @@ MigrationInfo *qmp_query_migrate(Error **errp)
         break;
     case MIGRATION_STATUS_SETUP:
         info->has_status = true;
-        info->status = g_strdup("setup");
+        info->status = MIGRATION_STATUS_SETUP;
         info->has_total_time = false;
         break;
     case MIGRATION_STATUS_ACTIVE:
     case MIGRATION_STATUS_CANCELLING:
         info->has_status = true;
-        info->status = g_strdup("active");
+        info->status = MIGRATION_STATUS_ACTIVE;
         info->has_total_time = true;
         info->total_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME)
             - s->total_time;
@@ -247,7 +237,7 @@ MigrationInfo *qmp_query_migrate(Error **errp)
         get_xbzrle_cache_stats(info);
 
         info->has_status = true;
-        info->status = g_strdup("completed");
+        info->status = MIGRATION_STATUS_COMPLETED;
         info->has_total_time = true;
         info->total_time = s->total_time;
         info->has_downtime = true;
@@ -269,11 +259,11 @@ MigrationInfo *qmp_query_migrate(Error **errp)
         break;
     case MIGRATION_STATUS_FAILED:
         info->has_status = true;
-        info->status = g_strdup("failed");
+        info->status = MIGRATION_STATUS_FAILED;
         break;
     case MIGRATION_STATUS_CANCELLED:
         info->has_status = true;
-        info->status = g_strdup("cancelled");
+        info->status = MIGRATION_STATUS_CANCELLED;
         break;
     }