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=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED 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 82945C4360C for ; Thu, 10 Oct 2019 12:14:43 +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 597C120673 for ; Thu, 10 Oct 2019 12:14:43 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 597C120673 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]:37000 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iIXL7-0007WI-Vf for qemu-devel@archiver.kernel.org; Thu, 10 Oct 2019 08:14:42 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:51841) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iIWr5-0006cb-Jq for qemu-devel@nongnu.org; Thu, 10 Oct 2019 07:43:42 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iIWr3-0008Cu-Qu for qemu-devel@nongnu.org; Thu, 10 Oct 2019 07:43:39 -0400 Received: from mx1.redhat.com ([209.132.183.28]:49946) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1iIWqy-0008BE-7n; Thu, 10 Oct 2019 07:43:32 -0400 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 6F8A619D369; Thu, 10 Oct 2019 11:43:31 +0000 (UTC) Received: from localhost (unknown [10.36.118.5]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 1355860A9F; Thu, 10 Oct 2019 11:43:30 +0000 (UTC) From: Max Reitz To: qemu-block@nongnu.org Subject: [PULL 13/36] block: teach bdrv_debug_breakpoint skip filters with backing Date: Thu, 10 Oct 2019 13:42:37 +0200 Message-Id: <20191010114300.7746-14-mreitz@redhat.com> In-Reply-To: <20191010114300.7746-1-mreitz@redhat.com> References: <20191010114300.7746-1-mreitz@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.29]); Thu, 10 Oct 2019 11:43:31 +0000 (UTC) Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 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 , Peter Maydell , qemu-devel@nongnu.org, Max Reitz Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" From: Vladimir Sementsov-Ogievskiy Teach bdrv_debug_breakpoint and bdrv_debug_remove_breakpoint skip filters with backing. This is needed to implement and use in backup job it's own backup_top filter driver (like mirror already has one), and without this improvement, breakpoint removal will fail at least in 55 iotest. Signed-off-by: Vladimir Sementsov-Ogievskiy Reviewed-by: Max Reitz Message-id: 20190920142056.12778-9-vsementsov@virtuozzo.com Signed-off-by: Max Reitz --- block.c | 34 ++++++++++++++++++++++++++-------- 1 file changed, 26 insertions(+), 8 deletions(-) diff --git a/block.c b/block.c index 5944124845..1c7c199849 100644 --- a/block.c +++ b/block.c @@ -5164,14 +5164,35 @@ void bdrv_debug_event(BlockDriverState *bs, Blkde= bugEvent event) bs->drv->bdrv_debug_event(bs, event); } =20 -int bdrv_debug_breakpoint(BlockDriverState *bs, const char *event, - const char *tag) +static BlockDriverState *bdrv_find_debug_node(BlockDriverState *bs) { while (bs && bs->drv && !bs->drv->bdrv_debug_breakpoint) { - bs =3D bs->file ? bs->file->bs : NULL; + if (bs->file) { + bs =3D bs->file->bs; + continue; + } + + if (bs->drv->is_filter && bs->backing) { + bs =3D bs->backing->bs; + continue; + } + + break; } =20 if (bs && bs->drv && bs->drv->bdrv_debug_breakpoint) { + assert(bs->drv->bdrv_debug_remove_breakpoint); + return bs; + } + + return NULL; +} + +int bdrv_debug_breakpoint(BlockDriverState *bs, const char *event, + const char *tag) +{ + bs =3D bdrv_find_debug_node(bs); + if (bs) { return bs->drv->bdrv_debug_breakpoint(bs, event, tag); } =20 @@ -5180,11 +5201,8 @@ int bdrv_debug_breakpoint(BlockDriverState *bs, co= nst char *event, =20 int bdrv_debug_remove_breakpoint(BlockDriverState *bs, const char *tag) { - while (bs && bs->drv && !bs->drv->bdrv_debug_remove_breakpoint) { - bs =3D bs->file ? bs->file->bs : NULL; - } - - if (bs && bs->drv && bs->drv->bdrv_debug_remove_breakpoint) { + bs =3D bdrv_find_debug_node(bs); + if (bs) { return bs->drv->bdrv_debug_remove_breakpoint(bs, tag); } =20 --=20 2.21.0