Message ID | 20210311151505.206534-2-vsementsov@virtuozzo.com |
---|---|
State | New |
Headers | show
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dkim=none (message not signed) header.d=none;nongnu.org; dmarc=none action=none header.from=virtuozzo.com; Received: from AM7PR08MB5494.eurprd08.prod.outlook.com (2603:10a6:20b:dc::15) by AS8PR08MB6551.eurprd08.prod.outlook.com (2603:10a6:20b:319::13) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3912.17; Thu, 11 Mar 2021 15:15:39 +0000 Received: from AM7PR08MB5494.eurprd08.prod.outlook.com ([fe80::f1f0:6610:11f5:5e4a]) by AM7PR08MB5494.eurprd08.prod.outlook.com ([fe80::f1f0:6610:11f5:5e4a%8]) with mapi id 15.20.3912.030; Thu, 11 Mar 2021 15:15:39 +0000 From: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> To: qemu-block@nongnu.org Cc: qemu-devel@nongnu.org, vsementsov@virtuozzo.com, jsnow@redhat.com, mreitz@redhat.com, kwolf@redhat.com, den@openvz.org Subject: [PATCH 1/3] block/commit: keep reference on commit_top_bs Date: Thu, 11 Mar 2021 18:15:03 +0300 Message-Id: <20210311151505.206534-2-vsementsov@virtuozzo.com> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210311151505.206534-1-vsementsov@virtuozzo.com> References: <20210311151505.206534-1-vsementsov@virtuozzo.com> Content-Transfer-Encoding: 8bit Content-Type: text/plain X-Originating-IP: [185.215.60.202] X-ClientProxiedBy: HE1PR05CA0247.eurprd05.prod.outlook.com (2603:10a6:3:fb::23) To AM7PR08MB5494.eurprd08.prod.outlook.com (2603:10a6:20b:dc::15) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from localhost.localdomain (185.215.60.202) by HE1PR05CA0247.eurprd05.prod.outlook.com (2603:10a6:3:fb::23) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3912.17 via Frontend Transport; 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Series |
block: drop inherits_from
|
expand
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diff --git a/block/commit.c b/block/commit.c index dd9ba87349..57f054ad5d 100644 --- a/block/commit.c +++ b/block/commit.c @@ -71,9 +71,8 @@ static void commit_abort(Job *job) bdrv_unfreeze_backing_chain(s->commit_top_bs, s->base_bs); } - /* Make sure commit_top_bs and top stay around until bdrv_replace_node() */ + /* Make sure top stay around until bdrv_replace_node() */ bdrv_ref(top_bs); - bdrv_ref(s->commit_top_bs); if (s->base) { blk_unref(s->base); @@ -93,7 +92,6 @@ static void commit_abort(Job *job) bdrv_replace_node(s->commit_top_bs, s->commit_top_bs->backing->bs, &error_abort); - bdrv_unref(s->commit_top_bs); bdrv_unref(top_bs); } @@ -109,6 +107,7 @@ static void commit_clean(Job *job) } g_free(s->backing_file_str); + bdrv_unref(s->commit_top_bs); blk_unref(s->top); } @@ -317,6 +316,8 @@ void commit_start(const char *job_id, BlockDriverState *bs, goto fail; } + bdrv_ref(commit_top_bs); + s->commit_top_bs = commit_top_bs; /* @@ -416,6 +417,7 @@ fail: * otherwise this would fail because of lack of permissions. */ if (commit_top_bs) { bdrv_replace_node(commit_top_bs, top, &error_abort); + bdrv_unref(commit_top_bs); } }
Nothing prevent removing of this node during the job. Job needs this node to be present, so it must keep the reference. Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> --- block/commit.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-)