From nobody Mon Feb 9 12:42:41 2026 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 1520587190114255.22500544013178; Fri, 9 Mar 2018 01:19:50 -0800 (PST) Received: from localhost ([::1]:43957 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1euEBp-0006Fo-3M for importer@patchew.org; Fri, 09 Mar 2018 04:19:49 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:42031) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1euDuq-0000Rc-CO for qemu-devel@nongnu.org; Fri, 09 Mar 2018 04:02:20 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1euDup-0000MM-Dh for qemu-devel@nongnu.org; Fri, 09 Mar 2018 04:02:16 -0500 Received: from mx3-rdu2.redhat.com ([66.187.233.73]:39672 helo=mx1.redhat.com) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1euDup-0000MD-8U for qemu-devel@nongnu.org; Fri, 09 Mar 2018 04:02:15 -0500 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.rdu2.redhat.com [10.11.54.4]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id BC9B08424D; Fri, 9 Mar 2018 09:02:14 +0000 (UTC) Received: from xz-mi.redhat.com (ovpn-12-92.pek2.redhat.com [10.72.12.92]) by smtp.corp.redhat.com (Postfix) with ESMTP id 1D162202322A; Fri, 9 Mar 2018 09:02:09 +0000 (UTC) From: Peter Xu To: qemu-devel@nongnu.org Date: Fri, 9 Mar 2018 17:00:04 +0800 Message-Id: <20180309090006.10018-22-peterx@redhat.com> In-Reply-To: <20180309090006.10018-1-peterx@redhat.com> References: <20180309090006.10018-1-peterx@redhat.com> X-Scanned-By: MIMEDefang 2.78 on 10.11.54.4 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.2]); Fri, 09 Mar 2018 09:02:14 +0000 (UTC) X-Greylist: inspected by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.2]); Fri, 09 Mar 2018 09:02:14 +0000 (UTC) for IP:'10.11.54.4' DOMAIN:'int-mx04.intmail.prod.int.rdu2.redhat.com' HELO:'smtp.corp.redhat.com' FROM:'peterx@redhat.com' RCPT:'' X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 66.187.233.73 Subject: [Qemu-devel] [PATCH v8 21/23] qmp: add command "x-oob-test" 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: Laurent Vivier , Fam Zheng , Juan Quintela , mdroth@linux.vnet.ibm.com, peterx@redhat.com, Markus Armbruster , marcandre.lureau@redhat.com, Stefan Hajnoczi , Paolo Bonzini , "Dr . David Alan Gilbert" Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" This command is only used to test OOB functionality. It should not be used for any other purposes. Reviewed-by: Stefan Hajnoczi Reviewed-by: Fam Zheng Signed-off-by: Peter Xu Reviewed-by: Eric Blake --- qapi/misc.json | 18 ++++++++++++++++++ qmp.c | 16 ++++++++++++++++ 2 files changed, 34 insertions(+) diff --git a/qapi/misc.json b/qapi/misc.json index 8c7e736681..07932bdacf 100644 --- a/qapi/misc.json +++ b/qapi/misc.json @@ -3264,3 +3264,21 @@ ## { 'event': 'COMMAND_DROPPED' , 'data': { 'id': 'any', 'reason': 'CommandDropReason' } } + +## +# @x-oob-test: +# +# Test OOB functionality. When send this command with lock=3Dtrue, +# it'll try to hang the dispatcher. When send it with lock=3Dfalse, +# it'll try to notify the locked thread to continue. Note: it should +# only be used by QMP test program rather than anything else. +# +# Since: 2.12 +# +# Example: +# +# { "execute": "x-oob-test", +# "arguments": { "lock": true } } +## +{ 'command': 'x-oob-test', 'data' : { 'lock': 'bool' }, + 'allow-oob': true } diff --git a/qmp.c b/qmp.c index 8c7d1cc479..d95d132448 100644 --- a/qmp.c +++ b/qmp.c @@ -770,3 +770,19 @@ MemoryInfo *qmp_query_memory_size_summary(Error **errp) =20 return mem_info; } + +static QemuSemaphore x_oob_test_sem; + +static void __attribute__((constructor)) x_oob_test_init(void) +{ + qemu_sem_init(&x_oob_test_sem, 0); +} + +void qmp_x_oob_test(bool lock, Error **errp) +{ + if (lock) { + qemu_sem_wait(&x_oob_test_sem); + } else { + qemu_sem_post(&x_oob_test_sem); + } +} --=20 2.14.3