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=-6.8 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 D48CCC433E1 for ; Thu, 25 Jun 2020 15:30:34 +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 A2D8020679 for ; Thu, 25 Jun 2020 15:30:34 +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="MfSY4gR1" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A2D8020679 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]:49122 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1joTph-0006qU-Tv for qemu-devel@archiver.kernel.org; Thu, 25 Jun 2020 11:30:33 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:37256) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1joTiM-0005f8-1b for qemu-devel@nongnu.org; Thu, 25 Jun 2020 11:22:59 -0400 Received: from us-smtp-2.mimecast.com ([207.211.31.81]:34988 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 1joTiI-0000ny-Mc for qemu-devel@nongnu.org; Thu, 25 Jun 2020 11:22:56 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1593098574; 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=rIrPbyY3/n1D6dbiL+f9UqPH10R3oWNqYHhFDDh5Xn4=; b=MfSY4gR1gvjG++xTiyi8rhW85DGFcWz1GHio5zuZ2NwlEKivUAtrGoTLHLrA7hfT2ODFDV CRnU9V3LxgbfsuJ4+dKs3V01bWuF6E3SldPj/C2OVO8gxQ0IrWyPw4U4MxO0Mhn9i2ovqJ WOz4lm2TIYkHZxjEH1GF2t6JqGDrUxc= 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-407-UispQZMJMDu3AsywrljdXA-1; Thu, 25 Jun 2020 11:22:48 -0400 X-MC-Unique: UispQZMJMDu3AsywrljdXA-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 C86711800D4A; Thu, 25 Jun 2020 15:22:47 +0000 (UTC) Received: from localhost (ovpn-113-182.ams2.redhat.com [10.36.113.182]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 6D0B71944D; Thu, 25 Jun 2020 15:22:47 +0000 (UTC) From: Max Reitz To: qemu-block@nongnu.org Subject: [PATCH v7 13/47] block: Use CAFs in block status functions Date: Thu, 25 Jun 2020 17:21:41 +0200 Message-Id: <20200625152215.941773-14-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 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=207.211.31.81; 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 02:30:11 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" Use the child access functions in the block status inquiry functions as appropriate. Signed-off-by: Max Reitz --- block/io.c | 19 ++++++++++--------- 1 file changed, 10 insertions(+), 9 deletions(-) diff --git a/block/io.c b/block/io.c index 385176b331..dc9891d6ce 100644 --- a/block/io.c +++ b/block/io.c @@ -2407,11 +2407,12 @@ static int coroutine_fn bdrv_co_block_status(BlockDriverState *bs, if (ret & (BDRV_BLOCK_DATA | BDRV_BLOCK_ZERO)) { ret |= BDRV_BLOCK_ALLOCATED; } else if (want_zero) { + BlockDriverState *cow_bs = bdrv_cow_bs(bs); + if (bdrv_unallocated_blocks_are_zero(bs)) { ret |= BDRV_BLOCK_ZERO; - } else if (bs->backing) { - BlockDriverState *bs2 = bs->backing->bs; - int64_t size2 = bdrv_getlength(bs2); + } else if (cow_bs) { + int64_t size2 = bdrv_getlength(cow_bs); if (size2 >= 0 && offset >= size2) { ret |= BDRV_BLOCK_ZERO; @@ -2477,7 +2478,7 @@ static int coroutine_fn bdrv_co_block_status_above(BlockDriverState *bs, bool first = true; assert(bs != base); - for (p = bs; p != base; p = backing_bs(p)) { + for (p = bs; p != base; p = bdrv_filter_or_cow_bs(p)) { ret = bdrv_co_block_status(p, want_zero, offset, bytes, pnum, map, file); if (ret < 0) { @@ -2551,7 +2552,7 @@ int bdrv_block_status_above(BlockDriverState *bs, BlockDriverState *base, int bdrv_block_status(BlockDriverState *bs, int64_t offset, int64_t bytes, int64_t *pnum, int64_t *map, BlockDriverState **file) { - return bdrv_block_status_above(bs, backing_bs(bs), + return bdrv_block_status_above(bs, bdrv_filter_or_cow_bs(bs), offset, bytes, pnum, map, file); } @@ -2561,9 +2562,9 @@ int coroutine_fn bdrv_is_allocated(BlockDriverState *bs, int64_t offset, int ret; int64_t dummy; - ret = bdrv_common_block_status_above(bs, backing_bs(bs), false, offset, - bytes, pnum ? pnum : &dummy, NULL, - NULL); + ret = bdrv_common_block_status_above(bs, bdrv_filter_or_cow_bs(bs), false, + offset, bytes, pnum ? pnum : &dummy, + NULL, NULL); if (ret < 0) { return ret; } @@ -2626,7 +2627,7 @@ int bdrv_is_allocated_above(BlockDriverState *top, break; } - intermediate = backing_bs(intermediate); + intermediate = bdrv_filter_or_cow_bs(intermediate); } *pnum = n; -- 2.26.2