From patchwork Thu May 4 17:37:45 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eric Blake X-Patchwork-Id: 9712385 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id DC1C060235 for ; Thu, 4 May 2017 17:38:33 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id CEBCC28617 for ; Thu, 4 May 2017 17:38:33 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id C0E6428635; Thu, 4 May 2017 17:38:33 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 2525328617 for ; Thu, 4 May 2017 17:38:32 +0000 (UTC) Received: from localhost ([::1]:43263 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1d6Ki0-0006o7-4m for patchwork-qemu-devel@patchwork.kernel.org; Thu, 04 May 2017 13:38:32 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:39053) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1d6KhR-0006mi-Mg for qemu-devel@nongnu.org; Thu, 04 May 2017 13:37:58 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1d6KhQ-0007Q3-Po for qemu-devel@nongnu.org; Thu, 04 May 2017 13:37:57 -0400 Received: from mx1.redhat.com ([209.132.183.28]:56814) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1d6KhM-0007Jd-GM; Thu, 04 May 2017 13:37:52 -0400 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 53118C2626; Thu, 4 May 2017 17:37:51 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com 53118C2626 Authentication-Results: ext-mx04.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx04.extmail.prod.ext.phx2.redhat.com; spf=pass smtp.mailfrom=eblake@redhat.com DKIM-Filter: OpenDKIM Filter v2.11.0 mx1.redhat.com 53118C2626 Received: from red.redhat.com (ovpn-122-206.rdu2.redhat.com [10.10.122.206]) by smtp.corp.redhat.com (Postfix) with ESMTP id 186FD18EFF; Thu, 4 May 2017 17:37:46 +0000 (UTC) From: Eric Blake To: qemu-devel@nongnu.org Date: Thu, 4 May 2017 12:37:45 -0500 Message-Id: <20170504173745.27414-1-eblake@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.28]); Thu, 04 May 2017 17:37:51 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH] block: Simplify BDRV_BLOCK_RAW recursion X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: kwolf@redhat.com, Fam Zheng , Stefan Hajnoczi , qemu-block@nongnu.org, Max Reitz Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP Since we are already in coroutine context during the body of bdrv_co_get_block_status(), we can shave off a few layers of wrappers when recursing to query the protocol when a format driver returned BDRV_BLOCK_RAW. Note that we are already using the correct recursion later on in the same function, when probing whether the protocol layer is sparse in order to find out if we can add BDRV_BLOCK_ZERO to an existing BDRV_BLOCK_DATA|BDRV_BLOCK_OFFSET_VALID. Signed-off-by: Eric Blake Reviewed-by: Max Reitz Reviewed-by: Fam Zheng --- block/io.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/block/io.c b/block/io.c index 40bd94f..fdd7485 100644 --- a/block/io.c +++ b/block/io.c @@ -1784,8 +1784,8 @@ static int64_t coroutine_fn bdrv_co_get_block_status(BlockDriverState *bs, if (ret & BDRV_BLOCK_RAW) { assert(ret & BDRV_BLOCK_OFFSET_VALID); - ret = bdrv_get_block_status(*file, ret >> BDRV_SECTOR_BITS, - *pnum, pnum, file); + ret = bdrv_co_get_block_status(*file, ret >> BDRV_SECTOR_BITS, + *pnum, pnum, file); goto out; }