From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([209.51.188.92]:57892) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hFLuh-0007AZ-U4 for qemu-devel@nongnu.org; Sat, 13 Apr 2019 12:54:00 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1hFLuh-0002lg-09 for qemu-devel@nongnu.org; Sat, 13 Apr 2019 12:53:59 -0400 From: Max Reitz Date: Sat, 13 Apr 2019 18:53:40 +0200 Message-Id: <20190413165343.9018-5-mreitz@redhat.com> In-Reply-To: <20190413165343.9018-1-mreitz@redhat.com> References: <20190413165343.9018-1-mreitz@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Subject: [Qemu-devel] [PATCH v3 4/7] blkdebug: Add "none" event List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-block@nongnu.org Cc: qemu-devel@nongnu.org, Max Reitz , Vladimir Sementsov-Ogievskiy , Andrey Shinkevich , Eric Blake , Kevin Wolf , "Denis V . Lunev" 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 --- 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 5141e91172..717b13f7f5 100644 --- a/qapi/block-core.json +++ b/qapi/block-core.json @@ -3215,6 +3215,8 @@ # # @cor_write: a write due to copy-on-read (since 2.11) # +# @none: triggers once at creation of the blkdebug node (since 4.1) +# # Since: 2.9 ## { 'enum': 'BlkdebugEvent', 'prefix': 'BLKDBG', @@ -3233,7 +3235,7 @@ '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 ca84b12e32..69c608be6f 100644 --- a/block/blkdebug.c +++ b/block/blkdebug.c @@ -491,6 +491,8 @@ static int blkdebug_open(BlockDriverState *bs, QDict = *options, int flags, goto out; } =20 + bdrv_debug_event(bs, BLKDBG_NONE); + ret =3D 0; out: if (ret < 0) { --=20 2.20.1 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=-6.9 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,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 A75D0C10F14 for ; Sat, 13 Apr 2019 16:58:12 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 798472082E for ; Sat, 13 Apr 2019 16:58:12 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 798472082E 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 ([127.0.0.1]:53879 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hFLyl-0002PR-Qi for qemu-devel@archiver.kernel.org; Sat, 13 Apr 2019 12:58:11 -0400 Received: from eggs.gnu.org ([209.51.188.92]:57892) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hFLuh-0007AZ-U4 for qemu-devel@nongnu.org; Sat, 13 Apr 2019 12:54:00 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1hFLuh-0002lg-09 for qemu-devel@nongnu.org; Sat, 13 Apr 2019 12:53:59 -0400 Received: from mx1.redhat.com ([209.132.183.28]:48244) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1hFLue-0002jE-Ra; Sat, 13 Apr 2019 12:53:57 -0400 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 mx1.redhat.com (Postfix) with ESMTPS id 0E40381E1B; Sat, 13 Apr 2019 16:53:56 +0000 (UTC) Received: from localhost (ovpn-204-66.brq.redhat.com [10.40.204.66]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 9898F5D71A; Sat, 13 Apr 2019 16:53:55 +0000 (UTC) From: Max Reitz To: qemu-block@nongnu.org Date: Sat, 13 Apr 2019 18:53:40 +0200 Message-Id: <20190413165343.9018-5-mreitz@redhat.com> In-Reply-To: <20190413165343.9018-1-mreitz@redhat.com> References: <20190413165343.9018-1-mreitz@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.25]); Sat, 13 Apr 2019 16:53:56 +0000 (UTC) Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH v3 4/7] 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 , Vladimir Sementsov-Ogievskiy , qemu-devel@nongnu.org, Max Reitz , "Denis V . Lunev" , Andrey Shinkevich Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Content-Type: text/plain; charset="UTF-8" Message-ID: <20190413165340.zLw8Zvb__ymn87uiLjt3Lg_3gzFqxPAaLoxN_SZfQZc@z> 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 --- 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 5141e91172..717b13f7f5 100644 --- a/qapi/block-core.json +++ b/qapi/block-core.json @@ -3215,6 +3215,8 @@ # # @cor_write: a write due to copy-on-read (since 2.11) # +# @none: triggers once at creation of the blkdebug node (since 4.1) +# # Since: 2.9 ## { 'enum': 'BlkdebugEvent', 'prefix': 'BLKDBG', @@ -3233,7 +3235,7 @@ '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 ca84b12e32..69c608be6f 100644 --- a/block/blkdebug.c +++ b/block/blkdebug.c @@ -491,6 +491,8 @@ static int blkdebug_open(BlockDriverState *bs, QDict = *options, int flags, goto out; } =20 + bdrv_debug_event(bs, BLKDBG_NONE); + ret =3D 0; out: if (ret < 0) { --=20 2.20.1