From patchwork Thu Sep 12 22:30:25 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Maxim Levitsky X-Patchwork-Id: 1161801 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (mailfrom) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=redhat.com 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 ozlabs.org (Postfix) with ESMTPS id 46Ttp437bLz9sNF for ; Fri, 13 Sep 2019 08:33:16 +1000 (AEST) Received: from localhost ([::1]:39190 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1i8XeL-0008FW-MO for incoming@patchwork.ozlabs.org; Thu, 12 Sep 2019 18:33:13 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:42034) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1i8XcU-00088a-4F for qemu-devel@nongnu.org; Thu, 12 Sep 2019 18:31:19 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1i8XcS-0005yk-OL for qemu-devel@nongnu.org; Thu, 12 Sep 2019 18:31:17 -0400 Received: from mx1.redhat.com ([209.132.183.28]:51758) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1i8XcP-0005wM-IF; Thu, 12 Sep 2019 18:31:13 -0400 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 E2234898105; Thu, 12 Sep 2019 22:31:12 +0000 (UTC) Received: from maximlenovopc.usersys.redhat.com (unknown [10.35.206.59]) by smtp.corp.redhat.com (Postfix) with ESMTP id 9D1805C1B2; Thu, 12 Sep 2019 22:31:10 +0000 (UTC) From: Maxim Levitsky To: qemu-devel@nongnu.org Date: Fri, 13 Sep 2019 01:30:25 +0300 Message-Id: <20190912223028.18496-9-mlevitsk@redhat.com> In-Reply-To: <20190912223028.18496-1-mlevitsk@redhat.com> References: <20190912223028.18496-1-mlevitsk@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-4.6.2 (mx1.redhat.com [10.5.110.67]); Thu, 12 Sep 2019 22:31:12 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH v2 08/11] block/crypto: implement blockdev-amend 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 , =?utf-8?q?Daniel_P=2E_Berrang=C3=A9?= , qemu-block@nongnu.org, Markus Armbruster , Max Reitz , Maxim Levitsky , John Snow Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" Signed-off-by: Maxim Levitsky Reviewed-by: Daniel P. Berrangé --- block/crypto.c | 85 ++++++++++++++++++++++++++++++++++---------- qapi/block-core.json | 7 ++-- 2 files changed, 71 insertions(+), 21 deletions(-) diff --git a/block/crypto.c b/block/crypto.c index f42fa057e6..5905f7f520 100644 --- a/block/crypto.c +++ b/block/crypto.c @@ -534,6 +534,17 @@ block_crypto_co_create_luks(BlockdevCreateOptions *create_options, Error **errp) assert(create_options->driver == BLOCKDEV_DRIVER_LUKS); luks_opts = &create_options->u.luks; + if (!luks_opts->has_size) { + error_setg(errp, "'size' is manadatory for image creation"); + return -EINVAL; + } + + if (!luks_opts->has_file) { + error_setg(errp, "'file' is manadatory for image creation"); + return -EINVAL; + } + + bs = bdrv_open_blockdev_ref(luks_opts->file, errp); if (bs == NULL) { return -EIO; @@ -667,6 +678,39 @@ block_crypto_get_specific_info_luks(BlockDriverState *bs, Error **errp) } +static int +block_crypto_amend_options_generic(BlockDriverState *bs, + QCryptoBlockCreateOptions *amend_options, + bool force, + Error **errp) +{ + BlockCrypto *crypto = bs->opaque; + int ret = -1; + + assert(crypto); + assert(crypto->block); + + /* apply for exclusive write permissions to the underlying file*/ + crypto->updating_keys = true; + ret = bdrv_child_refresh_perms(bs, bs->file, errp); + if (ret) { + goto cleanup; + } + + ret = qcrypto_block_amend_options(crypto->block, + block_crypto_read_func, + block_crypto_write_func, + bs, + amend_options, + force, + errp); +cleanup: + /* release exclusive write permissions to the underlying file*/ + crypto->updating_keys = false; + bdrv_child_refresh_perms(bs, bs->file, errp); + return ret; +} + static int block_crypto_amend_options(BlockDriverState *bs, QemuOpts *opts, @@ -678,44 +722,45 @@ block_crypto_amend_options(BlockDriverState *bs, BlockCrypto *crypto = bs->opaque; QDict *cryptoopts = NULL; QCryptoBlockCreateOptions *amend_options = NULL; - int ret; + int ret = -EINVAL; assert(crypto); assert(crypto->block); - crypto->updating_keys = true; - - ret = bdrv_child_refresh_perms(bs, bs->file, errp); - if (ret < 0) { - goto cleanup; - } - cryptoopts = qemu_opts_to_qdict_filtered(opts, NULL, &block_crypto_create_opts_luks, true); qdict_put_str(cryptoopts, "format", "luks"); amend_options = block_crypto_create_opts_init(cryptoopts, errp); + if (!amend_options) { - ret = -EINVAL; goto cleanup; } - ret = qcrypto_block_amend_options(crypto->block, - block_crypto_read_func, - block_crypto_write_func, - bs, - amend_options, - force, - errp); + ret = block_crypto_amend_options_generic(bs, amend_options, force, errp); cleanup: - crypto->updating_keys = false; - bdrv_child_refresh_perms(bs, bs->file, errp); qapi_free_QCryptoBlockCreateOptions(amend_options); qobject_unref(cryptoopts); return ret; } +static int +coroutine_fn block_crypto_co_amend(BlockDriverState *bs, + BlockdevCreateOptions *opts, + bool force, + Error **errp) +{ + QCryptoBlockCreateOptions amend_opts; + + amend_opts = (QCryptoBlockCreateOptions) { + .format = Q_CRYPTO_BLOCK_FORMAT_LUKS, + .u.luks = *qapi_BlockdevCreateOptionsLUKS_base(&opts->u.luks), + }; + + return block_crypto_amend_options_generic(bs, &amend_opts, force, errp); +} + static void block_crypto_child_perms(BlockDriverState *bs, BdrvChild *c, @@ -750,7 +795,8 @@ block_crypto_child_perms(BlockDriverState *bs, BdrvChild *c, */ if (crypto->updating_keys) { - /*need exclusive write access for header update */ + assert(!(bs->open_flags & BDRV_O_NO_IO)); + /*need exclusive read and write access for header update */ perm |= BLK_PERM_WRITE; shared &= ~(BLK_PERM_CONSISTENT_READ | BLK_PERM_WRITE); } @@ -786,6 +832,7 @@ static BlockDriver bdrv_crypto_luks = { .bdrv_get_info = block_crypto_get_info_luks, .bdrv_get_specific_info = block_crypto_get_specific_info_luks, .bdrv_amend_options = block_crypto_amend_options, + .bdrv_co_amend = block_crypto_co_amend, .strong_runtime_opts = block_crypto_strong_runtime_opts, }; diff --git a/qapi/block-core.json b/qapi/block-core.json index 7900914506..4a6db98938 100644 --- a/qapi/block-core.json +++ b/qapi/block-core.json @@ -4211,8 +4211,11 @@ # Driver specific image creation options for LUKS. # # @file Node to create the image format on +# Mandatory for create # @size Size of the virtual disk in bytes +# Mandatory for create # @preallocation Preallocation mode for the new image +# Only for create # (since: 4.2) # (default: off; allowed values: off, metadata, falloc, full) # @@ -4220,8 +4223,8 @@ ## { 'struct': 'BlockdevCreateOptionsLUKS', 'base': 'QCryptoBlockCreateOptionsLUKS', - 'data': { 'file': 'BlockdevRef', - 'size': 'size', + 'data': { '*file': 'BlockdevRef', + '*size': 'size', '*preallocation': 'PreallocMode' } } ##