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=-6.5 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 37B7FC32771 for ; Thu, 9 Jan 2020 11:12:26 +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 EBABD20656 for ; Thu, 9 Jan 2020 11:12:25 +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="C2zVSGex" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org EBABD20656 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]:58394 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ipVjl-00086S-1G for qemu-devel@archiver.kernel.org; Thu, 09 Jan 2020 06:12:25 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:53262) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ipVhx-0005Wo-3M for qemu-devel@nongnu.org; Thu, 09 Jan 2020 06:10:34 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ipVhv-0006WW-LX for qemu-devel@nongnu.org; Thu, 09 Jan 2020 06:10:32 -0500 Received: from us-smtp-1.mimecast.com ([207.211.31.81]:55849 helo=us-smtp-delivery-1.mimecast.com) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1ipVhv-0006Ub-FG for qemu-devel@nongnu.org; Thu, 09 Jan 2020 06:10:31 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1578568230; 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=3BKwdXPeqAkkgjJfXs2SspNUxdi108NJ8vBtjj44fXY=; b=C2zVSGexi2xYD8ior5h7VB9W912K8FK3yJ4Rt+GMpmvLSMqraKFf8Pk6fSrG41o4ADUtCD 6Odn54d1ysqeILiS3fPSqnNcAc0c0wbzH57PbrtMEjkosNl2Ggf+ukmc6Lk90YXD38fT9v sHW6sRH+th8cOpLLh6ukIjc6wVQc2Yg= 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-363-KyKxbbOfMl-r6W2tgjrOiA-1; Thu, 09 Jan 2020 06:10:27 -0500 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 4850D800D48; Thu, 9 Jan 2020 11:10:26 +0000 (UTC) Received: from localhost (unknown [10.36.118.69]) by smtp.corp.redhat.com (Postfix) with ESMTP id 2644660C88; Thu, 9 Jan 2020 11:10:21 +0000 (UTC) From: Stefan Hajnoczi To: qemu-devel@nongnu.org Subject: [PATCH v2 2/4] luks: implement .bdrv_measure() Date: Thu, 9 Jan 2020 11:10:10 +0000 Message-Id: <20200109111012.559052-3-stefanha@redhat.com> In-Reply-To: <20200109111012.559052-1-stefanha@redhat.com> References: <20200109111012.559052-1-stefanha@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-MC-Unique: KyKxbbOfMl-r6W2tgjrOiA-1 X-Mimecast-Spam-Score: 0 Content-Type: text/plain; charset=US-ASCII 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: 207.211.31.81 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 , Stefan Hajnoczi , qemu-block@nongnu.org, Max Reitz Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Add qemu-img measure support in the "luks" block driver. Signed-off-by: Stefan Hajnoczi --- block/crypto.c | 82 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 82 insertions(+) diff --git a/block/crypto.c b/block/crypto.c index ed32202fa2..51f37bb1f6 100644 --- a/block/crypto.c +++ b/block/crypto.c @@ -548,6 +548,87 @@ static int64_t block_crypto_getlength(BlockDriverState= *bs) } =20 =20 +static BlockMeasureInfo *block_crypto_measure(QemuOpts *opts, + BlockDriverState *in_bs, + Error **errp) +{ + Error *local_err =3D NULL; + BlockMeasureInfo *info; + uint64_t required =3D 0; /* bytes that contribute to required size */ + uint64_t virtual_size; /* disk size as seen by guest */ + size_t luks_payload_size; + char *optstr; + PreallocMode prealloc; + + optstr =3D qemu_opt_get_del(opts, BLOCK_OPT_PREALLOC); + prealloc =3D qapi_enum_parse(&PreallocMode_lookup, optstr, + PREALLOC_MODE_OFF, &local_err); + g_free(optstr); + if (local_err) { + goto err; + } + + virtual_size =3D qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0); + + if (!block_crypto_calculate_payload_offset(opts, NULL, &luks_payload_s= ize, + &local_err)) { + goto err; + } + + if (in_bs) { + int64_t ssize; + int64_t offset; + int64_t pnum =3D 0; + + ssize =3D bdrv_getlength(in_bs); + if (ssize < 0) { + error_setg_errno(&local_err, -ssize, + "Unable to get image virtual_size"); + goto err; + } + + virtual_size =3D ssize; + + for (offset =3D 0; offset < ssize; offset +=3D pnum) { + int ret; + + ret =3D bdrv_block_status_above(in_bs, NULL, offset, + ssize - offset, &pnum, NULL, + NULL); + if (ret < 0) { + error_setg_errno(&local_err, -ret, + "Unable to get block status"); + goto err; + } + + if (ret & BDRV_BLOCK_ZERO) { + /* Skip zero regions */ + } else if ((ret & (BDRV_BLOCK_DATA | BDRV_BLOCK_ALLOCATED)) = =3D=3D + (BDRV_BLOCK_DATA | BDRV_BLOCK_ALLOCATED)) { + /* Count clusters we've seen */ + required +=3D pnum; + } + } + } + + /* Take into account preallocation. Nothing special is needed for + * PREALLOC_MODE_METADATA since metadata is always counted. + */ + if (prealloc =3D=3D PREALLOC_MODE_FULL || prealloc =3D=3D PREALLOC_MOD= E_FALLOC) { + required =3D virtual_size; + } + + info =3D g_new(BlockMeasureInfo, 1); + info->fully_allocated =3D luks_payload_size + virtual_size; + info->required =3D luks_payload_size + required; + return info; + +err: + error_propagate(errp, local_err); + return NULL; +} + + static int block_crypto_probe_luks(const uint8_t *buf, int buf_size, const char *filename) { @@ -734,6 +815,7 @@ static BlockDriver bdrv_crypto_luks =3D { .bdrv_co_preadv =3D block_crypto_co_preadv, .bdrv_co_pwritev =3D block_crypto_co_pwritev, .bdrv_getlength =3D block_crypto_getlength, + .bdrv_measure =3D block_crypto_measure, .bdrv_get_info =3D block_crypto_get_info_luks, .bdrv_get_specific_info =3D block_crypto_get_specific_info_luks, =20 --=20 2.24.1