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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, mreitz@redhat.com, kwolf@redhat.com, berto@igalia.com, programmingkidx@gmail.com, Vladimir Sementsov-Ogievskiy Subject: [PATCH 1/2] block/vvfat: child_vvfat_qcow: add .get_parent_aio_context, fix crash Date: Mon, 24 May 2021 13:12:56 +0300 Message-Id: <20210524101257.119377-2-vsementsov@virtuozzo.com> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210524101257.119377-1-vsementsov@virtuozzo.com> References: <20210524101257.119377-1-vsementsov@virtuozzo.com> Content-Transfer-Encoding: quoted-printable X-Originating-IP: [185.215.60.195] X-ClientProxiedBy: HE1PR05CA0186.eurprd05.prod.outlook.com (2603:10a6:3:f8::34) To AM7PR08MB5494.eurprd08.prod.outlook.com (2603:10a6:20b:dc::15) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: fc096b63-1f43-4e58-9004-08d91e9c89d4 X-MS-TrafficTypeDiagnostic: AM7PR08MB5446: X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:19; 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envelope-from=qemu-devel-bounces+importer2=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=40.107.22.116; envelope-from=vsementsov@virtuozzo.com; helo=EUR05-AM6-obe.outbound.protection.outlook.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, MSGID_FROM_MTA_HEADER=0.001, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer2=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @virtuozzo.com) Content-Type: text/plain; charset="utf-8" Commit 3ca1f3225727419ba573673b744edac10904276f "block: BdrvChildClass: add .get_parent_aio_context handler" introduced new handler and commit 228ca37e12f97788e05bd0c92f89b3e5e4019607 "block: drop ctx argument from bdrv_root_attach_child" made a generic use of it. But 3ca1f3225727419ba573673b744edac10904276f didn't update child_vvfat_qcow. Fix that. Before that fix the command ./build/qemu-system-x86_64 -usb -device usb-storage,drive=3Dfat16 \ -drive file=3Dfat:rw:fat-type=3D16:"",id=3Dfat16,f= ormat=3Draw,if=3Dnone crashes: 1 bdrv_child_get_parent_aio_context (c=3D0x559d62426d20) at ../block.c:1440 2 bdrv_attach_child_common (child_bs=3D0x559d62468190, child_name=3D0x559d606f9e3d "write-target", child_class=3D0x559d60c58d20 , child_role=3D3, perm=3D3, shared_perm=3D4, opaque=3D0x559d62445690, child=3D0x7ffc74c2acc8, tran=3D0x559d6246ddd0, errp=3D0x7ffc74c2ae60) at ../block.c:2795 3 bdrv_attach_child_noperm (parent_bs=3D0x559d62445690, child_bs=3D0x559d62468190, child_name=3D0x559d606f9e3d "write-target", child_class=3D0x559d60c58d20 , child_role=3D3, child=3D0x7ffc74c2acc8, tran=3D0x559d6246ddd0, errp=3D0x7ffc74c2ae60) = at ../block.c:2855 4 bdrv_attach_child (parent_bs=3D0x559d62445690, child_bs=3D0x559d62468190, child_name=3D0x559d606f9e3d "write-target", child_class=3D0x559d60c58d20 , child_role=3D3, errp=3D0x7ffc74c2ae60) at ../block.c:2953 5 bdrv_open_child (filename=3D0x559d62464b80 "/var/tmp/vl.h3TIS4", options=3D0x559d6246ec20, bdref_key=3D0x559d606f9e3d "write-target", parent=3D0x559d62445690, child_class=3D0x559d60c58d20 , child_role=3D3, allow_none=3Dfalse, errp=3D0x7ffc74c2ae60) at ../block.c:3351 6 enable_write_target (bs=3D0x559d62445690, errp=3D0x7ffc74c2ae60) at ../block/vvfat.c:3176 7 vvfat_open (bs=3D0x559d62445690, options=3D0x559d6244adb0, flags=3D15565= 0, errp=3D0x7ffc74c2ae60) at ../block/vvfat.c:1236 8 bdrv_open_driver (bs=3D0x559d62445690, drv=3D0x559d60d4f7e0 , node_name=3D0x0, options=3D0x559d6244adb0, open_flags=3D155650, errp=3D0x7ffc74c2af70) at ../block.c:1557 9 bdrv_open_common (bs=3D0x559d62445690, file=3D0x0, options=3D0x559d6244adb0, errp=3D0x7ffc74c2af70) at ... (gdb) fr 1 #1 0x0000559d603ea3bf in bdrv_child_get_parent_aio_context (c=3D0x559d62426d20) at ../block.c:1440 1440 return c->klass->get_parent_aio_context(c); (gdb) p c->klass $1 =3D (const BdrvChildClass *) 0x559d60c58d20 (gdb) p c->klass->get_parent_aio_context $2 =3D (AioContext *(*)(BdrvChild *)) 0x0 Fixes: 3ca1f3225727419ba573673b744edac10904276f Fixes: 228ca37e12f97788e05bd0c92f89b3e5e4019607 Reported-by: Programmingkid Signed-off-by: Vladimir Sementsov-Ogievskiy --- include/block/block.h | 1 + block.c | 4 ++-- block/vvfat.c | 1 + 3 files changed, 4 insertions(+), 2 deletions(-) diff --git a/include/block/block.h b/include/block/block.h index 82185965ff..8e707a83b7 100644 --- a/include/block/block.h +++ b/include/block/block.h @@ -701,6 +701,7 @@ bool bdrv_child_can_set_aio_context(BdrvChild *c, AioCo= ntext *ctx, bool bdrv_can_set_aio_context(BlockDriverState *bs, AioContext *ctx, GSList **ignore, Error **errp); AioContext *bdrv_child_get_parent_aio_context(BdrvChild *c); +AioContext *child_of_bds_get_parent_aio_context(BdrvChild *c); =20 int bdrv_probe_blocksizes(BlockDriverState *bs, BlockSizes *bsz); int bdrv_probe_geometry(BlockDriverState *bs, HDGeometry *geo); diff --git a/block.c b/block.c index 0dc97281dc..ef13076c4c 100644 --- a/block.c +++ b/block.c @@ -1412,7 +1412,7 @@ static int bdrv_child_cb_update_filename(BdrvChild *c= , BlockDriverState *base, return 0; } =20 -static AioContext *bdrv_child_cb_get_parent_aio_context(BdrvChild *c) +AioContext *child_of_bds_get_parent_aio_context(BdrvChild *c) { BlockDriverState *bs =3D c->opaque; =20 @@ -1432,7 +1432,7 @@ const BdrvChildClass child_of_bds =3D { .can_set_aio_ctx =3D bdrv_child_cb_can_set_aio_ctx, .set_aio_ctx =3D bdrv_child_cb_set_aio_ctx, .update_filename =3D bdrv_child_cb_update_filename, - .get_parent_aio_context =3D bdrv_child_cb_get_parent_aio_context, + .get_parent_aio_context =3D child_of_bds_get_parent_aio_context, }; =20 AioContext *bdrv_child_get_parent_aio_context(BdrvChild *c) diff --git a/block/vvfat.c b/block/vvfat.c index 54807f82ca..07232a7cfc 100644 --- a/block/vvfat.c +++ b/block/vvfat.c @@ -3130,6 +3130,7 @@ static void vvfat_qcow_options(BdrvChildRole role, bo= ol parent_is_format, static const BdrvChildClass child_vvfat_qcow =3D { .parent_is_bds =3D true, .inherit_options =3D vvfat_qcow_options, + .get_parent_aio_context =3D child_of_bds_get_parent_aio_context, }; =20 static int enable_write_target(BlockDriverState *bs, Error **errp) --=20 2.29.2