From nobody Wed Oct 29 17:12:36 2025 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=virtuozzo.com Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 152457540141571.21523581597683; Tue, 24 Apr 2018 06:10:01 -0700 (PDT) Received: from localhost ([::1]:58423 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fAxhi-0008TM-03 for importer@patchew.org; Tue, 24 Apr 2018 09:09:54 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:35572) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fAxgL-0007gl-6Z for qemu-devel@nongnu.org; Tue, 24 Apr 2018 09:08:33 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fAxgG-0005U0-5g for qemu-devel@nongnu.org; Tue, 24 Apr 2018 09:08:29 -0400 Received: from relay.sw.ru ([185.231.240.75]:45490) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1fAxgF-0005Na-TL; Tue, 24 Apr 2018 09:08:24 -0400 Received: from msk-vpn.virtuozzo.com ([195.214.232.6] helo=kvm.sw.ru) by relay.sw.ru with esmtp (Exim 4.90_1) (envelope-from ) id 1fAxgD-0007sT-KX; Tue, 24 Apr 2018 16:08:21 +0300 From: Vladimir Sementsov-Ogievskiy To: qemu-devel@nongnu.org, qemu-block@nongnu.org Date: Tue, 24 Apr 2018 16:08:19 +0300 Message-Id: <20180424130821.50987-2-vsementsov@virtuozzo.com> X-Mailer: git-send-email 2.11.1 In-Reply-To: <20180424130821.50987-1-vsementsov@virtuozzo.com> References: <20180424130821.50987-1-vsementsov@virtuozzo.com> X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [fuzzy] X-Received-From: 185.231.240.75 Subject: [Qemu-devel] [RFC 1/3] block: add bdrv_reconnect X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: kwolf@redhat.com, vsementsov@virtuozzo.com, famz@redhat.com, armbru@redhat.com, mreitz@redhat.com, den@openvz.org, pbonzini@redhat.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" It will be used to reconnect NBD connection. Signed-off-by: Vladimir Sementsov-Ogievskiy --- include/block/block.h | 2 ++ include/block/block_int.h | 3 +++ block.c | 22 ++++++++++++++++++++++ 3 files changed, 27 insertions(+) diff --git a/include/block/block.h b/include/block/block.h index cdec3639a3..912e3f3dcc 100644 --- a/include/block/block.h +++ b/include/block/block.h @@ -604,4 +604,6 @@ bool bdrv_can_store_new_dirty_bitmap(BlockDriverState *= bs, const char *name, */ void bdrv_register_buf(BlockDriverState *bs, void *host, size_t size); void bdrv_unregister_buf(BlockDriverState *bs, void *host); + +int bdrv_reconnect(BlockDriverState *bs, Error **errp); #endif diff --git a/include/block/block_int.h b/include/block/block_int.h index c4dd1d4bb8..ab9018f1c4 100644 --- a/include/block/block_int.h +++ b/include/block/block_int.h @@ -475,6 +475,9 @@ struct BlockDriver { */ void (*bdrv_register_buf)(BlockDriverState *bs, void *host, size_t siz= e); void (*bdrv_unregister_buf)(BlockDriverState *bs, void *host); + + int (*bdrv_reconnect)(BlockDriverState *bs, Error **errp); + QLIST_ENTRY(BlockDriver) list; }; =20 diff --git a/block.c b/block.c index a2caadf0a0..fab4413d59 100644 --- a/block.c +++ b/block.c @@ -4095,6 +4095,28 @@ int bdrv_has_zero_init(BlockDriverState *bs) return 0; } =20 +int bdrv_reconnect(BlockDriverState *bs, Error **errp) +{ + int ret; + + if (bs->drv && bs->drv->bdrv_reconnect) { + return bs->drv->bdrv_reconnect(bs, errp); + } + + if (bs->backing) { + ret =3D bdrv_reconnect(bs->backing->bs, errp); + if (ret < 0) { + return ret; + } + } + + if (bs->file) { + return bdrv_reconnect(bs->file->bs, errp); + } + + return 0; +} + bool bdrv_unallocated_blocks_are_zero(BlockDriverState *bs) { BlockDriverInfo bdi; --=20 2.11.1