[PATCH 02/14] migration/qapi: Rename MigrationStats to MigrationRAMStats

[Peter Xu <peterx@redhat.com>]

This stats is only about RAM, make it accurate.  This paves way for
statistics for all devices.

Thanks to Markus, who pointed out that docs/devel/qapi-code-gen.rst has a
section "Compatibility considerations" stated:

    Since type names are not visible in the Client JSON Protocol, types
    may be freely renamed.  Even certain refactorings are invisible, such
    as splitting members from one type into a common base type.

Hence this change is not ABI violation according to the document.

While at it, touch up the lines to make it read better, correct the
restriction on migration status being 'active' or 'completed': over time we
grew too many new status that will also report "ram" section.

Cc: Daniel P. Berrangé <berrange@redhat.com>
Cc: devel@lists.libvirt.org
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Peter Xu <peterx@redhat.com>
---
 docs/about/removed-features.rst |  2 +-
 qapi/migration.json             | 10 +++++-----
 migration/migration-stats.h     |  2 +-
 3 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/docs/about/removed-features.rst b/docs/about/removed-features.rst
index 557a24679a..ccd49b5615 100644
--- a/docs/about/removed-features.rst
+++ b/docs/about/removed-features.rst
@@ -699,7 +699,7 @@ was superseded by ``sections``.
 ``query-migrate`` return value member ``skipped`` (removed in 9.1)
 ''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
 
-Member ``skipped`` of the ``MigrationStats`` struct hasn't been used
+Member ``skipped`` of the ``MigrationRAMStats`` struct hasn't been used
 for more than 10 years. Removed with no replacement.
 
 ``migrate`` command option ``inc`` (removed in 9.1)
diff --git a/qapi/migration.json b/qapi/migration.json
index 7134d4ce47..e3ad3f0604 100644
--- a/qapi/migration.json
+++ b/qapi/migration.json
@@ -12,7 +12,7 @@
 { 'include': 'sockets.json' }
 
 ##
-# @MigrationStats:
+# @MigrationRAMStats:
 #
 # Detailed migration status.
 #
@@ -64,7 +64,7 @@
 #
 # Since: 0.14
 ##
-{ 'struct': 'MigrationStats',
+{ 'struct': 'MigrationRAMStats',
   'data': {'transferred': 'int', 'remaining': 'int', 'total': 'int' ,
            'duplicate': 'int',
            'normal': 'int',
@@ -209,8 +209,8 @@
 #     If this field is not returned, no migration process has been
 #     initiated
 #
-# @ram: `MigrationStats` containing detailed migration status, only
-#     returned if status is 'active' or 'completed'(since 1.2)
+# @ram: Detailed migration RAM statistics, only returned if migration
+#     is in progress or completed (since 1.2)
 #
 # @xbzrle-cache: `XBZRLECacheStats` containing detailed XBZRLE
 #     migration statistics, only returned if XBZRLE feature is on and
@@ -309,7 +309,7 @@
 # Since: 0.14
 ##
 { 'struct': 'MigrationInfo',
-  'data': {'*status': 'MigrationStatus', '*ram': 'MigrationStats',
+  'data': {'*status': 'MigrationStatus', '*ram': 'MigrationRAMStats',
            '*vfio': 'VfioStats',
            '*xbzrle-cache': 'XBZRLECacheStats',
            '*total-time': 'int',
diff --git a/migration/migration-stats.h b/migration/migration-stats.h
index c0f50144c9..1153520f7a 100644
--- a/migration/migration-stats.h
+++ b/migration/migration-stats.h
@@ -27,7 +27,7 @@
 
 /*
  * These are the ram migration statistic counters.  It is loosely
- * based on MigrationStats.
+ * based on MigrationRAMStats.
  */
 typedef struct {
     /*
-- 
2.53.0