From patchwork Sun Mar 8 15:18:52 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Maxim Levitsky X-Patchwork-Id: 11425681 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 0A222921 for ; Sun, 8 Mar 2020 15:24:14 +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 CC9712072A for ; Sun, 8 Mar 2020 15:24:13 +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="Rs0pjOoI" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org CC9712072A 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]:58760 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jAxmm-0000NO-VD for patchwork-qemu-devel@patchwork.kernel.org; Sun, 08 Mar 2020 11:24:12 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:36888) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jAxi7-0000Ac-IT for qemu-devel@nongnu.org; Sun, 08 Mar 2020 11:19:25 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1jAxi6-0001aT-1w for qemu-devel@nongnu.org; Sun, 08 Mar 2020 11:19:23 -0400 Received: from us-smtp-2.mimecast.com ([207.211.31.81]:41196 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 1jAxi5-0001aD-TS for qemu-devel@nongnu.org; Sun, 08 Mar 2020 11:19:21 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1583680761; 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=G2Va7muALdUWptCABITJNG/sa2nbCWQeTRfmYe0dqxQ=; b=Rs0pjOoIyyChvVLK07M08M0YN+OVFBxMq0tJzFg4UVxIwJ1esGoupM7Yao5j2+6jfS2QFR JHML8ZbctYJrzlh+kZ9Pt6gWiWm7DTLFrpLplmwWwOKYpF4ifZ0NW3zuEfxYybN2Ea6ySK M8m1WyT+4wsTdaIH93hk6QAqNfC/MAY= 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-55-nu4F3nfJMke2iVcmWrRMyw-1; Sun, 08 Mar 2020 11:19:19 -0400 X-MC-Unique: nu4F3nfJMke2iVcmWrRMyw-1 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 mimecast-mx01.redhat.com (Postfix) with ESMTPS id DE57813F6; Sun, 8 Mar 2020 15:19:18 +0000 (UTC) Received: from maximlenovopc.usersys.redhat.com (unknown [10.35.206.96]) by smtp.corp.redhat.com (Postfix) with ESMTP id 805DB5C1B0; Sun, 8 Mar 2020 15:19:16 +0000 (UTC) From: Maxim Levitsky To: qemu-devel@nongnu.org Subject: [PATCH v2 03/14] block/amend: add 'force' option Date: Sun, 8 Mar 2020 17:18:52 +0200 Message-Id: <20200308151903.25941-4-mlevitsk@redhat.com> In-Reply-To: <20200308151903.25941-1-mlevitsk@redhat.com> References: <20200308151903.25941-1-mlevitsk@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 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] [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 , =?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+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" 'force' option will be used for some unsafe amend operations. This includes things like erasing last keyslot in luks based formats (which destroys the data, unless the master key is backed up by external means), but that _might_ be desired result. Signed-off-by: Maxim Levitsky Reviewed-by: Daniel P. Berrangé --- block.c | 4 +++- block/qcow2.c | 1 + docs/tools/qemu-img.rst | 5 ++++- include/block/block.h | 1 + include/block/block_int.h | 1 + qemu-img-cmds.hx | 4 ++-- qemu-img.c | 8 +++++++- 7 files changed, 19 insertions(+), 5 deletions(-) diff --git a/block.c b/block.c index 1bdb9c679d..3b6f51aa3e 100644 --- a/block.c +++ b/block.c @@ -6320,6 +6320,7 @@ void bdrv_remove_aio_context_notifier(BlockDriverState *bs, int bdrv_amend_options(BlockDriverState *bs, QemuOpts *opts, BlockDriverAmendStatusCB *status_cb, void *cb_opaque, + bool force, Error **errp) { if (!bs->drv) { @@ -6331,7 +6332,8 @@ int bdrv_amend_options(BlockDriverState *bs, QemuOpts *opts, bs->drv->format_name); return -ENOTSUP; } - return bs->drv->bdrv_amend_options(bs, opts, status_cb, cb_opaque, errp); + return bs->drv->bdrv_amend_options(bs, opts, status_cb, + cb_opaque, force, errp); } /* diff --git a/block/qcow2.c b/block/qcow2.c index 3c754f616b..b55e5b7c1f 100644 --- a/block/qcow2.c +++ b/block/qcow2.c @@ -5145,6 +5145,7 @@ static void qcow2_amend_helper_cb(BlockDriverState *bs, static int qcow2_amend_options(BlockDriverState *bs, QemuOpts *opts, BlockDriverAmendStatusCB *status_cb, void *cb_opaque, + bool force, Error **errp) { BDRVQcow2State *s = bs->opaque; diff --git a/docs/tools/qemu-img.rst b/docs/tools/qemu-img.rst index 0080f83a76..fc2dca6649 100644 --- a/docs/tools/qemu-img.rst +++ b/docs/tools/qemu-img.rst @@ -249,11 +249,14 @@ Command description: .. program:: qemu-img-commands -.. option:: amend [--object OBJECTDEF] [--image-opts] [-p] [-q] [-f FMT] [-t CACHE] -o OPTIONS FILENAME +.. option:: amend [--object OBJECTDEF] [--image-opts] [-p] [-q] [-f FMT] [-t CACHE] [--force] -o OPTIONS FILENAME Amends the image format specific *OPTIONS* for the image file *FILENAME*. Not all file formats support this operation. + --force allows some unsafe operations. Currently for -f luks, it allows to + erase last encryption key, and to overwrite an active encryption key. + .. option:: bench [-c COUNT] [-d DEPTH] [-f FMT] [--flush-interval=FLUSH_INTERVAL] [-i AIO] [-n] [--no-drain] [-o OFFSET] [--pattern=PATTERN] [-q] [-s BUFFER_SIZE] [-S STEP_SIZE] [-t CACHE] [-w] [-U] FILENAME Run a simple sequential I/O benchmark on the specified image. If ``-w`` is diff --git a/include/block/block.h b/include/block/block.h index cd6b5b95aa..dda18a3fa3 100644 --- a/include/block/block.h +++ b/include/block/block.h @@ -389,6 +389,7 @@ typedef void BlockDriverAmendStatusCB(BlockDriverState *bs, int64_t offset, int64_t total_work_size, void *opaque); int bdrv_amend_options(BlockDriverState *bs_new, QemuOpts *opts, BlockDriverAmendStatusCB *status_cb, void *cb_opaque, + bool force, Error **errp); /* check if a named node can be replaced when doing drive-mirror */ diff --git a/include/block/block_int.h b/include/block/block_int.h index 6f9fd5e20e..24d00fbf48 100644 --- a/include/block/block_int.h +++ b/include/block/block_int.h @@ -426,6 +426,7 @@ struct BlockDriver { int (*bdrv_amend_options)(BlockDriverState *bs, QemuOpts *opts, BlockDriverAmendStatusCB *status_cb, void *cb_opaque, + bool force, Error **errp); void (*bdrv_debug_event)(BlockDriverState *bs, BlkdebugEvent event); diff --git a/qemu-img-cmds.hx b/qemu-img-cmds.hx index c9c54de1df..9920f1f9d4 100644 --- a/qemu-img-cmds.hx +++ b/qemu-img-cmds.hx @@ -10,9 +10,9 @@ HXCOMM When amending the rST sections, please remember to copy the usage HXCOMM over to the per-command sections in qemu-img.texi. DEF("amend", img_amend, - "amend [--object objectdef] [--image-opts] [-p] [-q] [-f fmt] [-t cache] -o options filename") + "amend [--object objectdef] [--image-opts] [-p] [-q] [-f fmt] [-t cache] [--force] -o options filename") SRST -.. option:: amend [--object OBJECTDEF] [--image-opts] [-p] [-q] [-f FMT] [-t CACHE] -o OPTIONS FILENAME +.. option:: amend [--object OBJECTDEF] [--image-opts] [-p] [-q] [-f FMT] [-t CACHE] [--force] -o OPTIONS FILENAME ERST DEF("bench", img_bench, diff --git a/qemu-img.c b/qemu-img.c index 804630a368..551388676f 100644 --- a/qemu-img.c +++ b/qemu-img.c @@ -71,6 +71,7 @@ enum { OPTION_SHRINK = 266, OPTION_SALVAGE = 267, OPTION_TARGET_IS_ZERO = 268, + OPTION_FORCE = 269, }; typedef enum OutputFormat { @@ -3920,6 +3921,7 @@ static int img_amend(int argc, char **argv) BlockBackend *blk = NULL; BlockDriverState *bs = NULL; bool image_opts = false; + bool force = false; cache = BDRV_DEFAULT_CACHE; for (;;) { @@ -3927,6 +3929,7 @@ static int img_amend(int argc, char **argv) {"help", no_argument, 0, 'h'}, {"object", required_argument, 0, OPTION_OBJECT}, {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, + {"force", no_argument, 0, OPTION_FORCE}, {0, 0, 0, 0} }; c = getopt_long(argc, argv, ":ho:f:t:pq", @@ -3982,6 +3985,9 @@ static int img_amend(int argc, char **argv) case OPTION_IMAGE_OPTS: image_opts = true; break; + case OPTION_FORCE: + force = true; + break; } } @@ -4059,7 +4065,7 @@ static int img_amend(int argc, char **argv) /* In case the driver does not call amend_status_cb() */ qemu_progress_print(0.f, 0); - ret = bdrv_amend_options(bs, opts, &amend_status_cb, NULL, &err); + ret = bdrv_amend_options(bs, opts, &amend_status_cb, NULL, force, &err); qemu_progress_print(100.f, 0); if (ret < 0) { error_report_err(err);