From nobody Fri Dec 19 08:20:07 2025 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=redhat.com Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1543859953088528.1647705896977; Mon, 3 Dec 2018 09:59:13 -0800 (PST) Received: from localhost ([::1]:51261 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gTsUx-0005y0-Cf for importer@patchew.org; Mon, 03 Dec 2018 12:59:11 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:45049) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gTsOd-0006NM-1G for qemu-devel@nongnu.org; Mon, 03 Dec 2018 12:52:39 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gTsOa-0007T5-Fl for qemu-devel@nongnu.org; Mon, 03 Dec 2018 12:52:38 -0500 Received: from mx1.redhat.com ([209.132.183.28]:42470) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1gTsOW-0007MK-E3; Mon, 03 Dec 2018 12:52:32 -0500 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 6032C3001FCD; Mon, 3 Dec 2018 17:52:26 +0000 (UTC) Received: from localhost (unknown [10.36.118.45]) by smtp.corp.redhat.com (Postfix) with ESMTPS id C450D1019637; Mon, 3 Dec 2018 17:52:25 +0000 (UTC) From: Max Reitz To: qemu-block@nongnu.org Date: Mon, 3 Dec 2018 18:52:09 +0100 Message-Id: <20181203175211.8230-5-mreitz@redhat.com> In-Reply-To: <20181203175211.8230-1-mreitz@redhat.com> References: <20181203175211.8230-1-mreitz@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.45]); Mon, 03 Dec 2018 17:52:26 +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 Subject: [Qemu-devel] [PATCH for-next 4/6] blkdebug: Add "none" event 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: Kevin Wolf , Markus Armbruster , qemu-devel@nongnu.org, Max Reitz Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Type: text/plain; charset="utf-8" Together with @iotypes and @sector, this can be used to trap e.g. the first read or write access to a certain sector without having to know what happens internally in the block layer, i.e. which "real" events happen right before such an access. Signed-off-by: Max Reitz Reviewed-by: Eric Blake --- qapi/block-core.json | 4 +++- block/blkdebug.c | 2 ++ 2 files changed, 5 insertions(+), 1 deletion(-) diff --git a/qapi/block-core.json b/qapi/block-core.json index 469d889753..045206196b 100644 --- a/qapi/block-core.json +++ b/qapi/block-core.json @@ -3004,6 +3004,8 @@ # # @cor_write: a write due to copy-on-read (since 2.11) # +# @none: triggers once at creation of the blkdebug node (since 4.0) +# # Since: 2.9 ## { 'enum': 'BlkdebugEvent', 'prefix': 'BLKDBG', @@ -3022,7 +3024,7 @@ 'pwritev_rmw_tail', 'pwritev_rmw_after_tail', 'pwritev', 'pwritev_zero', 'pwritev_done', 'empty_image_prepare', 'l1_shrink_write_table', 'l1_shrink_free_l2_clusters', - 'cor_write'] } + 'cor_write', 'none' ] } =20 ## # @BlkdebugIOType: diff --git a/block/blkdebug.c b/block/blkdebug.c index d15b6c5fef..51f07648ba 100644 --- a/block/blkdebug.c +++ b/block/blkdebug.c @@ -491,6 +491,8 @@ static int blkdebug_open(BlockDriverState *bs, QDict *o= ptions, int flags, goto out; } =20 + bdrv_debug_event(bs, BLKDBG_NONE); + ret =3D 0; out: if (ret < 0) { --=20 2.19.2