From patchwork Thu Apr 16 09:50:19 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Maxim Levitsky X-Patchwork-Id: 11492587 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id CA2ED81 for ; Thu, 16 Apr 2020 09:51:04 +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 A09882063A for ; Thu, 16 Apr 2020 09:51:04 +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="K3UXdxQ7" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A09882063A 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+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Received: from localhost ([::1]:60120 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jP1Al-0007TQ-Ol for patchwork-qemu-devel@patchwork.kernel.org; Thu, 16 Apr 2020 05:51:03 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:58147) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jP1AD-0006YF-BA for qemu-devel@nongnu.org; Thu, 16 Apr 2020 05:50:30 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1jP1AC-0006ak-5J for qemu-devel@nongnu.org; Thu, 16 Apr 2020 05:50:29 -0400 Received: from us-smtp-delivery-1.mimecast.com ([205.139.110.120]:32626 helo=us-smtp-1.mimecast.com) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1jP1AC-0006aF-14 for qemu-devel@nongnu.org; Thu, 16 Apr 2020 05:50:28 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1587030627; 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=47/3Th7brauSxUnjemVf9ft1hw3PvAXKdoVZcIE9hWs=; b=K3UXdxQ77BgAK+3fAQyZm9EMQiZ41pLkxCXeqYtphmtkKrcceUF+kp2ucTyezAqqCNpoYr ec+4HdQftDyheHHwwBerZcdRZy5HtK8jeG98me9w0VJ0prUyJ5MlKiBorw3KZa61tQwkpg Sip5p2peL1wcUSqtrvMfox2v6vnIWR0= 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-106-iKSAeQloPCesU7uTAj1zEg-1; Thu, 16 Apr 2020 05:50:25 -0400 X-MC-Unique: iKSAeQloPCesU7uTAj1zEg-1 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id DF429801E57; Thu, 16 Apr 2020 09:50:24 +0000 (UTC) Received: from maximlenovopc.usersys.redhat.com (unknown [10.35.206.56]) by smtp.corp.redhat.com (Postfix) with ESMTP id 720906EF91; Thu, 16 Apr 2020 09:50:23 +0000 (UTC) From: Maxim Levitsky To: qemu-devel@nongnu.org Subject: [PATCH 1/1] block/crypto: better error message when creating too large files Date: Thu, 16 Apr 2020 12:50:19 +0300 Message-Id: <20200416095019.4406-2-mlevitsk@redhat.com> In-Reply-To: <20200416095019.4406-1-mlevitsk@redhat.com> References: <20200416095019.4406-1-mlevitsk@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com X-detected-operating-system: by eggs.gnu.org: GNU/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 , Maxim Levitsky , qemu-block@nongnu.org, Max Reitz Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" Currently if you attampt to create too large file with luks you get the following error message: Formatting 'test.luks', fmt=luks size=17592186044416 key-secret=sec0 qemu-img: test.luks: Could not resize file: File too large While for raw format the error message is qemu-img: test.img: The image size is too large for file format 'raw' The reason for this is that qemu-img checks for errno of the failure, and presents the later error when it is -EFBIG However crypto generic code 'swallows' the errno and replaces it with -EIO. As an attempt to make it better, we can make luks driver, detect -EFBIG and in this case present a better error message, which is what this patch does The new error message is: qemu-img: error creating test.luks: The requested file size is too large Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1534898 Signed-off-by: Maxim Levitsky Reviewed-by: Daniel P. Berrangé --- block/crypto.c | 23 ++++++++++++++++++++--- 1 file changed, 20 insertions(+), 3 deletions(-) diff --git a/block/crypto.c b/block/crypto.c index d577f89659..1b604beb30 100644 --- a/block/crypto.c +++ b/block/crypto.c @@ -104,18 +104,35 @@ static ssize_t block_crypto_init_func(QCryptoBlock *block, Error **errp) { struct BlockCryptoCreateData *data = opaque; + Error *local_error = NULL; + int ret; if (data->size > INT64_MAX || headerlen > INT64_MAX - data->size) { - error_setg(errp, "The requested file size is too large"); - return -EFBIG; + ret = -EFBIG; + goto error; } /* User provided size should reflect amount of space made * available to the guest, so we must take account of that * which will be used by the crypto header */ - return blk_truncate(data->blk, data->size + headerlen, false, + ret = blk_truncate(data->blk, data->size + headerlen, false, data->prealloc, errp); + + if (ret >= 0) { + return ret; + } + +error: + if (ret == -EFBIG) { + /* Replace the error message with a better one */ + error_free(local_error); + error_setg(errp, "The requested file size is too large"); + } else { + error_propagate(errp, local_error); + } + + return ret; }