From patchwork Wed Apr 29 14:11:25 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Max Reitz X-Patchwork-Id: 283782 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.6 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 51E05C83000 for ; Wed, 29 Apr 2020 14:15:10 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 1DAA120B80 for ; Wed, 29 Apr 2020 14:15:10 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="Lg5MZ530" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1DAA120B80 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:54590 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jTnUT-0002Dp-37 for qemu-devel@archiver.kernel.org; Wed, 29 Apr 2020 10:15:09 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:44612) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jTnRH-0004ZC-DO for qemu-devel@nongnu.org; Wed, 29 Apr 2020 10:11:51 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.90_1) (envelope-from ) id 1jTnRH-00045M-0S for qemu-devel@nongnu.org; Wed, 29 Apr 2020 10:11:51 -0400 Received: from us-smtp-delivery-1.mimecast.com ([205.139.110.120]:57055 helo=us-smtp-1.mimecast.com) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1jTnRG-00045E-IU for qemu-devel@nongnu.org; Wed, 29 Apr 2020 10:11:50 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1588169509; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=+JfwS4rDpAdfjq6rnTazzWwBEOj7DlcLQ3maGcEHnmo=; b=Lg5MZ530CuQtTmIk0j0jvxFW7lOzUHW7VlDwW/zoK8S+NYVzAcHZtPGYLOHQ9R/dqtaAb5 fFAM/B7La2q37Yrba4r3EI809/kwzYfC8t3nz6xVqefrT66+Yv/i89N6qp3FXJTXDlhmeL NBmAHR/CK7PPen28th4DkjBVg+AQ7+o= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-328-oxTgmQrXOtKL2VwXh0QJ2g-1; Wed, 29 Apr 2020 10:11:35 -0400 X-MC-Unique: oxTgmQrXOtKL2VwXh0QJ2g-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 7AACF100CCE4; Wed, 29 Apr 2020 14:11:34 +0000 (UTC) Received: from localhost (ovpn-113-19.ams2.redhat.com [10.36.113.19]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 1DA7B1001281; Wed, 29 Apr 2020 14:11:33 +0000 (UTC) From: Max Reitz To: qemu-block@nongnu.org Subject: [PATCH v2 3/4] block: Add blk_make_empty() Date: Wed, 29 Apr 2020 16:11:25 +0200 Message-Id: <20200429141126.85159-4-mreitz@redhat.com> In-Reply-To: <20200429141126.85159-1-mreitz@redhat.com> References: <20200429141126.85159-1-mreitz@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=205.139.110.120; envelope-from=mreitz@redhat.com; helo=us-smtp-1.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/04/29 01:42:37 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] X-Received-From: 205.139.110.120 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: , Cc: Kevin Wolf , qemu-devel@nongnu.org, Max Reitz Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Two callers of BlockDriver.bdrv_make_empty() remain that should not call this method directly. Both do not have access to a BdrvChild, but they can use a BlockBackend, so we add this function that lets them use it. Signed-off-by: Max Reitz --- include/sysemu/block-backend.h | 2 ++ block/block-backend.c | 10 ++++++++++ 2 files changed, 12 insertions(+) diff --git a/include/sysemu/block-backend.h b/include/sysemu/block-backend.h index 0917663d89..8203d7f6f9 100644 --- a/include/sysemu/block-backend.h +++ b/include/sysemu/block-backend.h @@ -266,4 +266,6 @@ int coroutine_fn blk_co_copy_range(BlockBackend *blk_in, int64_t off_in, const BdrvChild *blk_root(BlockBackend *blk); +int blk_make_empty(BlockBackend *blk, Error **errp); + #endif diff --git a/block/block-backend.c b/block/block-backend.c index f4944861fa..47bd56244d 100644 --- a/block/block-backend.c +++ b/block/block-backend.c @@ -2402,3 +2402,13 @@ const BdrvChild *blk_root(BlockBackend *blk) { return blk->root; } + +int blk_make_empty(BlockBackend *blk, Error **errp) +{ + if (!blk_is_available(blk)) { + error_setg(errp, "No medium inserted"); + return -ENOMEDIUM; + } + + return bdrv_make_empty(blk->root, errp); +}