From patchwork Mon Jun 8 09:40:17 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Maxim Levitsky X-Patchwork-Id: 281184 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 76235C433DF for ; Mon, 8 Jun 2020 09:43:55 +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 3FD0A206D5 for ; Mon, 8 Jun 2020 09:43:55 +0000 (UTC) Authentication-Results: mail.kernel.org; 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Mon, 8 Jun 2020 09:40:38 +0000 (UTC) Received: from starship.redhat.com (unknown [10.35.206.112]) by smtp.corp.redhat.com (Postfix) with ESMTP id 0268D1CA; Mon, 8 Jun 2020 09:40:35 +0000 (UTC) From: Maxim Levitsky To: qemu-devel@nongnu.org Subject: [PATCH v8 01/14] qcrypto/core: add generic infrastructure for crypto options amendment Date: Mon, 8 Jun 2020 12:40:17 +0300 Message-Id: <20200608094030.670121-2-mlevitsk@redhat.com> In-Reply-To: <20200608094030.670121-1-mlevitsk@redhat.com> References: <20200608094030.670121-1-mlevitsk@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=205.139.110.61; envelope-from=mlevitsk@redhat.com; helo=us-smtp-delivery-1.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/06/08 01:20:45 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, 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 , =?utf-8?q?Daniel_P=2E_Berrang=C3=A9?= , qemu-block@nongnu.org, John Snow , Markus Armbruster , Max Reitz , Maxim Levitsky Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" This will be used first to implement luks keyslot management. block_crypto_amend_opts_init will be used to convert qemu-img cmdline to QCryptoBlockAmendOptions Signed-off-by: Maxim Levitsky Reviewed-by: Daniel P. Berrangé --- block/crypto.c | 17 +++++++++++++++++ block/crypto.h | 3 +++ crypto/block.c | 29 +++++++++++++++++++++++++++++ crypto/blockpriv.h | 8 ++++++++ include/crypto/block.h | 22 ++++++++++++++++++++++ qapi/crypto.json | 16 ++++++++++++++++ 6 files changed, 95 insertions(+) diff --git a/block/crypto.c b/block/crypto.c index 973b57b3eb..dcf8b42bb2 100644 --- a/block/crypto.c +++ b/block/crypto.c @@ -202,6 +202,23 @@ block_crypto_create_opts_init(QDict *opts, Error **errp) return ret; } +QCryptoBlockAmendOptions * +block_crypto_amend_opts_init(QDict *opts, Error **errp) +{ + Visitor *v; + QCryptoBlockAmendOptions *ret; + + v = qobject_input_visitor_new_flat_confused(opts, errp); + if (!v) { + return NULL; + } + + visit_type_QCryptoBlockAmendOptions(v, NULL, &ret, errp); + + visit_free(v); + return ret; +} + static int block_crypto_open_generic(QCryptoBlockFormat format, QemuOptsList *opts_spec, diff --git a/block/crypto.h b/block/crypto.h index b935695e79..06e044c9be 100644 --- a/block/crypto.h +++ b/block/crypto.h @@ -91,6 +91,9 @@ QCryptoBlockCreateOptions * block_crypto_create_opts_init(QDict *opts, Error **errp); +QCryptoBlockAmendOptions * +block_crypto_amend_opts_init(QDict *opts, Error **errp); + QCryptoBlockOpenOptions * block_crypto_open_opts_init(QDict *opts, Error **errp); diff --git a/crypto/block.c b/crypto/block.c index 6f42b32f1e..eb057948b5 100644 --- a/crypto/block.c +++ b/crypto/block.c @@ -150,6 +150,35 @@ qcrypto_block_calculate_payload_offset(QCryptoBlockCreateOptions *create_opts, return crypto != NULL; } +int qcrypto_block_amend_options(QCryptoBlock *block, + QCryptoBlockReadFunc readfunc, + QCryptoBlockWriteFunc writefunc, + void *opaque, + QCryptoBlockAmendOptions *options, + bool force, + Error **errp) +{ + if (options->format != block->format) { + error_setg(errp, + "Cannot amend encryption format"); + return -1; + } + + if (!block->driver->amend) { + error_setg(errp, + "Crypto format %s doesn't support format options amendment", + QCryptoBlockFormat_str(block->format)); + return -1; + } + + return block->driver->amend(block, + readfunc, + writefunc, + opaque, + options, + force, + errp); +} QCryptoBlockInfo *qcrypto_block_get_info(QCryptoBlock *block, Error **errp) diff --git a/crypto/blockpriv.h b/crypto/blockpriv.h index 71c59cb542..3c7ccea504 100644 --- a/crypto/blockpriv.h +++ b/crypto/blockpriv.h @@ -62,6 +62,14 @@ struct QCryptoBlockDriver { void *opaque, Error **errp); + int (*amend)(QCryptoBlock *block, + QCryptoBlockReadFunc readfunc, + QCryptoBlockWriteFunc writefunc, + void *opaque, + QCryptoBlockAmendOptions *options, + bool force, + Error **errp); + int (*get_info)(QCryptoBlock *block, QCryptoBlockInfo *info, Error **errp); diff --git a/include/crypto/block.h b/include/crypto/block.h index c77ccaf9c0..d274819791 100644 --- a/include/crypto/block.h +++ b/include/crypto/block.h @@ -144,6 +144,28 @@ QCryptoBlock *qcrypto_block_create(QCryptoBlockCreateOptions *options, void *opaque, Error **errp); +/** + * qcrypto_block_amend_options: + * @block: the block encryption object + * + * @readfunc: callback for reading data from the volume header + * @writefunc: callback for writing data to the volume header + * @opaque: data to pass to @readfunc and @writefunc + * @options: the new/amended encryption options + * @force: hint for the driver to allow unsafe operation + * @errp: error pointer + * + * Changes the crypto options of the encryption format + * + */ +int qcrypto_block_amend_options(QCryptoBlock *block, + QCryptoBlockReadFunc readfunc, + QCryptoBlockWriteFunc writefunc, + void *opaque, + QCryptoBlockAmendOptions *options, + bool force, + Error **errp); + /** * qcrypto_block_calculate_payload_offset: diff --git a/qapi/crypto.json b/qapi/crypto.json index b2a4cff683..aeb6c7ef7b 100644 --- a/qapi/crypto.json +++ b/qapi/crypto.json @@ -309,3 +309,19 @@ 'base': 'QCryptoBlockInfoBase', 'discriminator': 'format', 'data': { 'luks': 'QCryptoBlockInfoLUKS' } } + + + +## +# @QCryptoBlockAmendOptions: +# +# The options that are available for all encryption formats +# when amending encryption settings +# +# Since: 5.1 +## +{ 'union': 'QCryptoBlockAmendOptions', + 'base': 'QCryptoBlockOptionsBase', + 'discriminator': 'format', + 'data': { + } }