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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, vsementsov@virtuozzo.com, armbru@redhat.com, eblake@redhat.com, fam@euphon.net, stefanha@redhat.com, mreitz@redhat.com, kwolf@redhat.com, den@openvz.org Subject: [PATCH v6 07/15] block: bdrv_check_perm(): process children anyway Date: Fri, 18 Sep 2020 21:19:43 +0300 Message-Id: <20200918181951.21752-8-vsementsov@virtuozzo.com> X-Mailer: git-send-email 2.21.3 In-Reply-To: <20200918181951.21752-1-vsementsov@virtuozzo.com> References: <20200918181951.21752-1-vsementsov@virtuozzo.com> Content-Transfer-Encoding: quoted-printable X-ClientProxiedBy: AM4PR05CA0019.eurprd05.prod.outlook.com (2603:10a6:205::32) 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: [185.215.60.106] X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 443c538f-6aa1-4318-e0f6-08d85bff7b48 X-MS-TrafficTypeDiagnostic: AM5PR0801MB1905: X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:4941; 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charset="utf-8" Do generic processing even for drivers which define .bdrv_check_perm handler. It's needed for further preallocate filter: it will need to do additional action on bdrv_check_perm, but don't want to reimplement generic logic. The patch doesn't change existing behaviour: the only driver that implements bdrv_check_perm is file-posix, but it never has any children. Also, bdrv_set_perm() don't stop processing if driver has .bdrv_set_perm handler as well. Signed-off-by: Vladimir Sementsov-Ogievskiy --- block.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/block.c b/block.c index 9538af4884..165c2d3cb2 100644 --- a/block.c +++ b/block.c @@ -1964,8 +1964,7 @@ static void bdrv_child_perm(BlockDriverState *bs, Blo= ckDriverState *child_bs, /* * Check whether permissions on this node can be changed in a way that * @cumulative_perms and @cumulative_shared_perms are the new cumulative - * permissions of all its parents. This involves checking whether all nece= ssary - * permission changes to child nodes can be performed. + * permissions of all its parents. * * Will set *tighten_restrictions to true if and only if new permissions h= ave to * be taken or currently shared permissions are to be unshared. Otherwise, @@ -2047,8 +2046,11 @@ static int bdrv_check_perm(BlockDriverState *bs, Blo= ckReopenQueue *q, } =20 if (drv->bdrv_check_perm) { - return drv->bdrv_check_perm(bs, cumulative_perms, - cumulative_shared_perms, errp); + ret =3D drv->bdrv_check_perm(bs, cumulative_perms, + cumulative_shared_perms, errp); + if (ret < 0) { + return ret; + } } =20 /* Drivers that never have children can omit .bdrv_child_perm() */ --=20 2.21.3