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dkim=none (message not signed) header.d=none;nongnu.org; dmarc=none action=none header.from=virtuozzo.com; From: Vladimir Sementsov-Ogievskiy To: qemu-block@nongnu.org Cc: qemu-devel@nongnu.org, fam@euphon.net, stefanha@redhat.com, mreitz@redhat.com, kwolf@redhat.com, eblake@redhat.com, den@openvz.org, vsementsov@virtuozzo.com Subject: [PATCH v6 3/5] block/io: bdrv_common_block_status_above: support bs == base Date: Wed, 16 Sep 2020 15:20:06 +0300 Message-Id: <20200916122008.20303-4-vsementsov@virtuozzo.com> X-Mailer: git-send-email 2.21.3 In-Reply-To: <20200916122008.20303-1-vsementsov@virtuozzo.com> References: <20200916122008.20303-1-vsementsov@virtuozzo.com> Content-Transfer-Encoding: quoted-printable X-ClientProxiedBy: AM0PR04CA0018.eurprd04.prod.outlook.com (2603:10a6:208:122::31) To AM7PR08MB5494.eurprd08.prod.outlook.com (2603:10a6:20b:dc::15) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 X-Mailer: git-send-email 2.21.3 X-Originating-IP: [185.215.60.75] X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: a6d9865c-1ef5-484c-9f89-08d85a3ae407 X-MS-TrafficTypeDiagnostic: AM6PR08MB5077: X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:1417; 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charset="utf-8" We are going to reuse bdrv_common_block_status_above in bdrv_is_allocated_above. bdrv_is_allocated_above may be called with include_base =3D=3D false and still bs =3D=3D base (for ex. from img_rebase= ()). So, support this corner case. Signed-off-by: Vladimir Sementsov-Ogievskiy Reviewed-by: Kevin Wolf Reviewed-by: Eric Blake Reviewed-by: Alberto Garcia --- block/io.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/block/io.c b/block/io.c index 0cc2dd7a3e..d864d035ac 100644 --- a/block/io.c +++ b/block/io.c @@ -2371,9 +2371,13 @@ bdrv_co_common_block_status_above(BlockDriverState *= bs, BlockDriverState *p; int64_t eof =3D 0; =20 - assert(include_base || bs !=3D base); assert(!include_base || base); /* Can't include NULL base */ =20 + if (!include_base && bs =3D=3D base) { + *pnum =3D bytes; + return 0; + } + ret =3D bdrv_co_block_status(bs, want_zero, offset, bytes, pnum, map, = file); if (ret < 0 || *pnum =3D=3D 0 || ret & BDRV_BLOCK_ALLOCATED || bs =3D= =3D base) { return ret; --=20 2.21.3