dirty-bitmap: Expose persistent flag to 'query-block'

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>

diff --git a/block/dirty-bitmap.c b/block/dirty-bitmap.c
index 00ea36f55456d11733084d87a6452104d40ca666..e46f72b346cbb3c6231911474af89b0afe7a8e7c 100644 (file)
--- 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 ee1ab7a8a259434af6fefc3681363d4194e9a7d8..b8c8e04d025160474f1e184e0d41c9bd9fc0fc20 100644 (file)
--- a/qapi/block-core.json
+++ b/qapi/block-core.json
@@ -450,11 +450,14 @@
 #
 # @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 9f189e3b54004c44dfaf697137db8770a1375df3..5aa1bf1bd64704ee1293f246b24e2ea65eae42b7 100755 (executable)
--- 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 bb2d71ea5ecddfbb47ab5dc0e0df03db9db0ebae..5006f7bca16b32d0036cfa9e6681363e605f7a76 100644 (file)
--- 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"
       }
     ]