From patchwork Thu Jun 25 15:22:05 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Max Reitz X-Patchwork-Id: 279436 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=-6.8 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 1CC8DC433E1 for ; Thu, 25 Jun 2020 15:45:13 +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 DAAEC2080C for ; Thu, 25 Jun 2020 15:45:12 +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="f4lv+4lY" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org DAAEC2080C 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]:41310 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1joU3s-0004aG-1t for qemu-devel@archiver.kernel.org; Thu, 25 Jun 2020 11:45:12 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:37934) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1joTj9-0006hO-2I for qemu-devel@nongnu.org; Thu, 25 Jun 2020 11:23:47 -0400 Received: from us-smtp-2.mimecast.com ([205.139.110.61]:23412 helo=us-smtp-delivery-1.mimecast.com) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1joTj7-0001Pa-62 for qemu-devel@nongnu.org; Thu, 25 Jun 2020 11:23:46 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1593098624; 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=h/Yl/2jRZhZlPGJGP9AJRvFe0734mYF3oEnNfao89Xs=; b=f4lv+4lYqU7NiAzB5UgVk03PIhg5TbIdFiLOQZGidYkhyPq1MayOCl4/l8w3B/4/tvaL+p BU+T5jm1EOYy+47dE9ktIsz4Tta3G+l7Q6gv7cw76pEmbeHi+tvei2DovT0CS9yFszYOAF mipyMd64OX6TjDsk850Z7LMnH2zsNfQ= 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-372-egdhuAkLONOMRPTUYL5e8w-1; Thu, 25 Jun 2020 11:23:41 -0400 X-MC-Unique: egdhuAkLONOMRPTUYL5e8w-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 99F3D100960F; Thu, 25 Jun 2020 15:23:40 +0000 (UTC) Received: from localhost (ovpn-113-182.ams2.redhat.com [10.36.113.182]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 3AAC21944D; Thu, 25 Jun 2020 15:23:40 +0000 (UTC) From: Max Reitz To: qemu-block@nongnu.org Subject: [PATCH v7 37/47] qemu-img: Use child access functions Date: Thu, 25 Jun 2020 17:22:05 +0200 Message-Id: <20200625152215.941773-38-mreitz@redhat.com> In-Reply-To: <20200625152215.941773-1-mreitz@redhat.com> References: <20200625152215.941773-1-mreitz@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 Received-SPF: pass client-ip=205.139.110.61; envelope-from=mreitz@redhat.com; helo=us-smtp-delivery-1.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/06/25 00:45:15 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -30 X-Spam_score: -3.1 X-Spam_bar: --- X-Spam_report: (-3.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H3=-0.01, RCVD_IN_MSPIKE_WL=-0.01, SPF_HELO_NONE=0.001, 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 , Vladimir Sementsov-Ogievskiy , qemu-devel@nongnu.org, Max Reitz Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" This changes iotest 204's output, because blkdebug on top of a COW node used to make qemu-img map disregard the rest of the backing chain (the backing chain was broken by the filter). With this patch, the allocation in the base image is reported correctly. Signed-off-by: Max Reitz --- qemu-img.c | 36 ++++++++++++++++++++++-------------- tests/qemu-iotests/204.out | 1 + 2 files changed, 23 insertions(+), 14 deletions(-) diff --git a/qemu-img.c b/qemu-img.c index 381271a74e..947be6ffac 100644 --- a/qemu-img.c +++ b/qemu-img.c @@ -1089,7 +1089,7 @@ static int img_commit(int argc, char **argv) /* This is different from QMP, which by default uses the deepest file in * the backing chain (i.e., the very base); however, the traditional * behavior of qemu-img commit is using the immediate backing file. */ - base_bs = backing_bs(bs); + base_bs = bdrv_backing_chain_next(bs); if (!base_bs) { error_setg(&local_err, "Image does not have a backing file"); goto done; @@ -1737,18 +1737,20 @@ static int convert_iteration_sectors(ImgConvertState *s, int64_t sector_num) if (s->sector_next_status <= sector_num) { uint64_t offset = (sector_num - src_cur_offset) * BDRV_SECTOR_SIZE; int64_t count; + BlockDriverState *src_bs = blk_bs(s->src[src_cur]); + BlockDriverState *base; + + if (s->target_has_backing) { + base = bdrv_cow_bs(bdrv_skip_filters(src_bs)); + } else { + base = NULL; + } do { count = n * BDRV_SECTOR_SIZE; - if (s->target_has_backing) { - ret = bdrv_block_status(blk_bs(s->src[src_cur]), offset, - count, &count, NULL, NULL); - } else { - ret = bdrv_block_status_above(blk_bs(s->src[src_cur]), NULL, - offset, count, &count, NULL, - NULL); - } + ret = bdrv_block_status_above(src_bs, base, offset, count, &count, + NULL, NULL); if (ret < 0) { if (s->salvage) { @@ -2673,7 +2675,8 @@ static int img_convert(int argc, char **argv) * s.target_backing_sectors has to be negative, which it will * be automatically). The backing file length is used only * for optimizations, so such a case is not fatal. */ - s.target_backing_sectors = bdrv_nb_sectors(out_bs->backing->bs); + s.target_backing_sectors = + bdrv_nb_sectors(bdrv_backing_chain_next(out_bs)); } else { s.target_backing_sectors = -1; } @@ -3044,6 +3047,7 @@ static int get_block_status(BlockDriverState *bs, int64_t offset, depth = 0; for (;;) { + bs = bdrv_skip_filters(bs); ret = bdrv_block_status(bs, offset, bytes, &bytes, &map, &file); if (ret < 0) { return ret; @@ -3052,7 +3056,7 @@ static int get_block_status(BlockDriverState *bs, int64_t offset, if (ret & (BDRV_BLOCK_ZERO|BDRV_BLOCK_DATA)) { break; } - bs = backing_bs(bs); + bs = bdrv_cow_bs(bs); if (bs == NULL) { ret = 0; break; @@ -3437,6 +3441,7 @@ static int img_rebase(int argc, char **argv) uint8_t *buf_old = NULL; uint8_t *buf_new = NULL; BlockDriverState *bs = NULL, *prefix_chain_bs = NULL; + BlockDriverState *unfiltered_bs; char *filename; const char *fmt, *cache, *src_cache, *out_basefmt, *out_baseimg; int c, flags, src_flags, ret; @@ -3571,6 +3576,8 @@ static int img_rebase(int argc, char **argv) } bs = blk_bs(blk); + unfiltered_bs = bdrv_skip_filters(bs); + if (out_basefmt != NULL) { if (bdrv_find_format(out_basefmt) == NULL) { error_report("Invalid format name: '%s'", out_basefmt); @@ -3582,7 +3589,7 @@ static int img_rebase(int argc, char **argv) /* For safe rebasing we need to compare old and new backing file */ if (!unsafe) { QDict *options = NULL; - BlockDriverState *base_bs = backing_bs(bs); + BlockDriverState *base_bs = bdrv_cow_bs(unfiltered_bs); if (base_bs) { blk_old_backing = blk_new(qemu_get_aio_context(), @@ -3738,8 +3745,9 @@ static int img_rebase(int argc, char **argv) * If cluster wasn't changed since prefix_chain, we don't need * to take action */ - ret = bdrv_is_allocated_above(backing_bs(bs), prefix_chain_bs, - false, offset, n, &n); + ret = bdrv_is_allocated_above(bdrv_cow_bs(unfiltered_bs), + prefix_chain_bs, false, + offset, n, &n); if (ret < 0) { error_report("error while reading image metadata: %s", strerror(-ret)); diff --git a/tests/qemu-iotests/204.out b/tests/qemu-iotests/204.out index f3a10fbe90..684774d763 100644 --- a/tests/qemu-iotests/204.out +++ b/tests/qemu-iotests/204.out @@ -59,5 +59,6 @@ Offset Length File 0x900000 0x2400000 TEST_DIR/t.IMGFMT 0x3c00000 0x1100000 TEST_DIR/t.IMGFMT 0x6a00000 0x400000 TEST_DIR/t.IMGFMT +0x6e00000 0x1200000 TEST_DIR/t.IMGFMT.base No errors were found on the image. *** done