From 7fecc102918b8945abefa36ee01da3b707849b41 Mon Sep 17 00:00:00 2001
From: John Snow <jsnow@redhat.com>
Date: Wed, 3 Apr 2019 18:18:37 +0200
Subject: [PATCH 132/163] dirty-bitmap: Expose persistent flag to 'query-block'

RH-Author: John Snow <jsnow@redhat.com>
Message-id: <20190403181857.9693-2-jsnow@redhat.com>
Patchwork-id: 85420
O-Subject: [RHEL-7.7 qemu-kvm-rhev PATCH 01/21] dirty-bitmap: Expose persistent flag to 'query-block'
Bugzilla: 1677073
RH-Acked-by: Max Reitz <mreitz@redhat.com>
RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
RH-Acked-by: Sergio Lopez Pascual <slp@redhat.com>

From: Eric Blake <eblake@redhat.com>

Since qemu currently doesn't flush persistent bitmaps to disk until
shutdown (which might be MUCH later), it's useful if 'query-block'
at least shows WHICH bitmaps will (eventually) make it to persistent
storage.  Update affected iotests.

Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Message-id: 20190204210512.27458-1-eblake@redhat.com
Signed-off-by: John Snow <jsnow@redhat.com>
(cherry picked from commit f67cf661f8b88afe8a5ea2f120583924cba9087f)
Signed-off-by: John Snow <jsnow@redhat.com>
Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
---
 block/dirty-bitmap.c       |  1 +
 qapi/block-core.json       |  5 ++++-
 tests/qemu-iotests/124     |  1 +
 tests/qemu-iotests/236.out | 14 ++++++++++++++
 4 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/block/dirty-bitmap.c b/block/dirty-bitmap.c
index 00ea36f..e46f72b 100644
--- a/block/dirty-bitmap.c
+++ b/block/dirty-bitmap.c
@@ -440,6 +440,7 @@ BlockDirtyInfoList *bdrv_query_dirty_bitmaps(BlockDriverState *bs)
         info->has_name = !!bm->name;
         info->name = g_strdup(bm->name);
         info->status = bdrv_dirty_bitmap_status(bm);
+        info->persistent = bm->persistent;
         entry->value = info;
         *plist = entry;
         plist = &entry->next;
diff --git a/qapi/block-core.json b/qapi/block-core.json
index 5d6bb14..23c9462 100644
--- a/qapi/block-core.json
+++ b/qapi/block-core.json
@@ -451,11 +451,14 @@
 #
 # @status: current status of the dirty bitmap (since 2.4)
 #
+# @persistent: true if the bitmap will eventually be flushed to persistent
+#              storage (since 4.0)
+#
 # Since: 1.3
 ##
 { 'struct': 'BlockDirtyInfo',
   'data': {'*name': 'str', 'count': 'int', 'granularity': 'uint32',
-           'status': 'DirtyBitmapStatus'} }
+           'status': 'DirtyBitmapStatus', 'persistent': 'bool' } }
 
 ##
 # @Qcow2BitmapInfoFlags:
diff --git a/tests/qemu-iotests/124 b/tests/qemu-iotests/124
index 3ea4ac5..439a86a 100755
--- a/tests/qemu-iotests/124
+++ b/tests/qemu-iotests/124
@@ -350,6 +350,7 @@ class TestIncrementalBackup(TestIncrementalBackupBase):
         self.assert_qmp(result, 'return[0]/dirty-bitmaps[0]/count', 458752)
         self.assert_qmp(result, 'return[0]/dirty-bitmaps[0]/granularity', 65536)
         self.assert_qmp(result, 'return[0]/dirty-bitmaps[0]/status', 'active')
+        self.assert_qmp(result, 'return[0]/dirty-bitmaps[0]/persistent', False)
 
         # Prepare a cluster_size=128k backup target without a backing file.
         (target, _) = bitmap0.new_target()
diff --git a/tests/qemu-iotests/236.out b/tests/qemu-iotests/236.out
index bb2d71e..5006f7b 100644
--- a/tests/qemu-iotests/236.out
+++ b/tests/qemu-iotests/236.out
@@ -25,12 +25,14 @@ write -P0xcd 0x3ff0000 64k
         "count": 262144,
         "granularity": 65536,
         "name": "bitmapB",
+        "persistent": false,
         "status": "active"
       },
       {
         "count": 262144,
         "granularity": 65536,
         "name": "bitmapA",
+        "persistent": false,
         "status": "active"
       }
     ]
@@ -85,12 +87,14 @@ write -P0xcd 0x3ff0000 64k
         "count": 262144,
         "granularity": 65536,
         "name": "bitmapB",
+        "persistent": false,
         "status": "active"
       },
       {
         "count": 262144,
         "granularity": 65536,
         "name": "bitmapA",
+        "persistent": false,
         "status": "active"
       }
     ]
@@ -183,18 +187,21 @@ write -P0xea 0x3fe0000 64k
         "count": 393216,
         "granularity": 65536,
         "name": "bitmapC",
+        "persistent": false,
         "status": "disabled"
       },
       {
         "count": 262144,
         "granularity": 65536,
         "name": "bitmapB",
+        "persistent": false,
         "status": "disabled"
       },
       {
         "count": 458752,
         "granularity": 65536,
         "name": "bitmapA",
+        "persistent": false,
         "status": "disabled"
       }
     ]
@@ -247,18 +254,21 @@ write -P0xea 0x3fe0000 64k
         "count": 393216,
         "granularity": 65536,
         "name": "bitmapC",
+        "persistent": false,
         "status": "disabled"
       },
       {
         "count": 262144,
         "granularity": 65536,
         "name": "bitmapB",
+        "persistent": false,
         "status": "disabled"
       },
       {
         "count": 458752,
         "granularity": 65536,
         "name": "bitmapA",
+        "persistent": false,
         "status": "disabled"
       }
     ]
@@ -304,24 +314,28 @@ write -P0xea 0x3fe0000 64k
         "count": 458752,
         "granularity": 65536,
         "name": "bitmapD",
+        "persistent": false,
         "status": "disabled"
       },
       {
         "count": 393216,
         "granularity": 65536,
         "name": "bitmapC",
+        "persistent": false,
         "status": "disabled"
       },
       {
         "count": 262144,
         "granularity": 65536,
         "name": "bitmapB",
+        "persistent": false,
         "status": "disabled"
       },
       {
         "count": 458752,
         "granularity": 65536,
         "name": "bitmapA",
+        "persistent": false,
         "status": "disabled"
       }
     ]
-- 
1.8.3.1