From mboxrd@z Thu Jan 1 00:00:00 1970 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=-6.8 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 6FA79C433DF for ; Thu, 25 Jun 2020 15:41:59 +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 3CA2320706 for ; Thu, 25 Jun 2020 15:41:59 +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="Zu323QG2" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3CA2320706 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]:58926 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1joU0k-0007df-Gf for qemu-devel@archiver.kernel.org; Thu, 25 Jun 2020 11:41:58 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:37324) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1joTiQ-0005iI-RT for qemu-devel@nongnu.org; Thu, 25 Jun 2020 11:23:03 -0400 Received: from us-smtp-2.mimecast.com ([207.211.31.81]:20985 helo=us-smtp-delivery-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 1joTiO-0000tz-1d for qemu-devel@nongnu.org; Thu, 25 Jun 2020 11:23:02 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1593098579; 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=sLtShjaBLZarYjMFYpOtzf8DGl/cdiY036TpaXA36N0=; b=Zu323QG28iUGsZ6XUU+OLiKU0tAxjUJdBAPlKsBgwRQbWIkOSl0ZZrYkhYt8ryzBJFZ5Rh BmEhlomEzL9DUxwNOjlwYzYDjLiXQnH1ygDpHG6THXZ0j1Azp2Ft0stMUdkakk+bJp/1lP npZTxXZulRqZNqCIxAUqh48Yg6zMwro= 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-195-bxdB9b8aOE69Ng3v53KQZg-1; Thu, 25 Jun 2020 11:22:55 -0400 X-MC-Unique: bxdB9b8aOE69Ng3v53KQZg-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 998AA1009456; Thu, 25 Jun 2020 15:22:54 +0000 (UTC) Received: from localhost (ovpn-113-182.ams2.redhat.com [10.36.113.182]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 276E15DD61; Thu, 25 Jun 2020 15:22:53 +0000 (UTC) From: Max Reitz To: qemu-block@nongnu.org Subject: [PATCH v7 16/47] block: Use bdrv_cow_child() in bdrv_co_truncate() Date: Thu, 25 Jun 2020 17:21:44 +0200 Message-Id: <20200625152215.941773-17-mreitz@redhat.com> In-Reply-To: <20200625152215.941773-1-mreitz@redhat.com> References: <20200625152215.941773-1-mreitz@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=207.211.31.81; envelope-from=mreitz@redhat.com; helo=us-smtp-delivery-1.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/06/25 02:30:11 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -30 X-Spam_score: -3.1 X-Spam_bar: --- X-Spam_report: (-3.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H3=-0.01, RCVD_IN_MSPIKE_WL=-0.01, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=_AUTOLEARN 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: , Cc: Kevin Wolf , Vladimir Sementsov-Ogievskiy , qemu-devel@nongnu.org, Max Reitz Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" The condition modified here is not about potentially filtered children, but only about COW sources (i.e. traditional backing files). Signed-off-by: Max Reitz --- block/io.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/block/io.c b/block/io.c index dc9891d6ce..097a3861d8 100644 --- a/block/io.c +++ b/block/io.c @@ -3308,7 +3308,7 @@ int coroutine_fn bdrv_co_truncate(BdrvChild *child, int64_t offset, bool exact, Error **errp) { BlockDriverState *bs = child->bs; - BdrvChild *filtered; + BdrvChild *filtered, *backing; BlockDriver *drv = bs->drv; BdrvTrackedRequest req; int64_t old_size, new_bytes; @@ -3361,6 +3361,7 @@ int coroutine_fn bdrv_co_truncate(BdrvChild *child, int64_t offset, bool exact, } filtered = bdrv_filter_child(bs); + backing = bdrv_cow_child(bs); /* * If the image has a backing file that is large enough that it would @@ -3372,10 +3373,10 @@ int coroutine_fn bdrv_co_truncate(BdrvChild *child, int64_t offset, bool exact, * backing file, taking care of keeping things consistent with that backing * file is the user's responsibility. */ - if (new_bytes && bs->backing) { + if (new_bytes && backing) { int64_t backing_len; - backing_len = bdrv_getlength(backing_bs(bs)); + backing_len = bdrv_getlength(backing->bs); if (backing_len < 0) { ret = backing_len; error_setg_errno(errp, -ret, "Could not get backing file size"); -- 2.26.2