From nobody Mon Feb 9 01:16:06 2026 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=redhat.com Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1545088132011969.7906750122693; Mon, 17 Dec 2018 15:08:52 -0800 (PST) Received: from localhost ([::1]:50376 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gZ20I-0001Rj-Rp for importer@patchew.org; Mon, 17 Dec 2018 18:08:50 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:33939) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gZ1dB-0007hg-7d for qemu-devel@nongnu.org; Mon, 17 Dec 2018 17:44:58 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gZ1dA-0006VP-BZ for qemu-devel@nongnu.org; Mon, 17 Dec 2018 17:44:57 -0500 Received: from mx1.redhat.com ([209.132.183.28]:50686) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1gZ1d7-0006UE-G0; Mon, 17 Dec 2018 17:44:53 -0500 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id CE01C42BD1; Mon, 17 Dec 2018 22:44:52 +0000 (UTC) Received: from localhost (ovpn-204-73.brq.redhat.com [10.40.204.73]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 5C9155C578; Mon, 17 Dec 2018 22:44:52 +0000 (UTC) From: Max Reitz To: qemu-block@nongnu.org Date: Mon, 17 Dec 2018 23:43:42 +0100 Message-Id: <20181217224348.14922-26-mreitz@redhat.com> In-Reply-To: <20181217224348.14922-1-mreitz@redhat.com> References: <20181217224348.14922-1-mreitz@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.30]); Mon, 17 Dec 2018 22:44:52 +0000 (UTC) Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH v12 25/31] block: Do not copy exact_filename from format file 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: Kevin Wolf , Alberto Garcia , qemu-devel@nongnu.org, Max Reitz Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Type: text/plain; charset="utf-8" If a format BDS's file BDS is in turn a format BDS, we cannot simply use the same filename, because when opening a BDS tree based on a filename alone, qemu will create only one format node on top of one protocol node (disregarding a potential backing file). Signed-off-by: Max Reitz Reviewed-by: Alberto Garcia --- block.c | 18 +++++++++++++++--- 1 file changed, 15 insertions(+), 3 deletions(-) diff --git a/block.c b/block.c index c8399a9036..44bebfc80c 100644 --- a/block.c +++ b/block.c @@ -5513,9 +5513,21 @@ void bdrv_refresh_filename(BlockDriverState *bs) =20 bs->exact_filename[0] =3D '\0'; =20 - /* If no specific options have been given for this BDS, the filena= me of - * the underlying file should suffice for this one as well */ - if (bs->file->bs->exact_filename[0] && !generate_json_filename) { + /* + * We can use the underlying file's filename if: + * - it has a filename, + * - the file is a protocol BDS, and + * - opening that file (as this BDS's format) will automatically c= reate + * the BDS tree we have right now, that is: + * - the user did not significantly change this BDS's behavior w= ith + * some explicit (strong) options + * - no non-file child of this BDS has been overridden by the us= er + * Both of these conditions are represented by generate_json_fil= ename. + */ + if (bs->file->bs->exact_filename[0] && + bs->file->bs->drv->bdrv_file_open && + !generate_json_filename) + { strcpy(bs->exact_filename, bs->file->bs->exact_filename); } } --=20 2.19.2