From nobody Tue Apr 30 15:39:40 2024 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 Return-Path: Received: from lists.gnu.org (208.118.235.17 [208.118.235.17]) by mx.zohomail.com with SMTPS id 1512453254252693.7170503482149; Mon, 4 Dec 2017 21:54:14 -0800 (PST) Received: from localhost ([::1]:46592 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eM6BB-0003YP-Ba for importer@patchew.org; Tue, 05 Dec 2017 00:54:05 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:33151) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eM69T-0002Vm-41 for qemu-devel@nongnu.org; Tue, 05 Dec 2017 00:52:19 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eM69S-0000nt-CF for qemu-devel@nongnu.org; Tue, 05 Dec 2017 00:52:19 -0500 Received: from mx1.redhat.com ([209.132.183.28]:14148) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1eM69S-0000nl-5w for qemu-devel@nongnu.org; Tue, 05 Dec 2017 00:52:18 -0500 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 46A007EA92; Tue, 5 Dec 2017 05:52:17 +0000 (UTC) Received: from xz-mi.nay.redhat.com (dhcp-14-111.nay.redhat.com [10.66.14.111]) by smtp.corp.redhat.com (Postfix) with ESMTP id 2939865E86; Tue, 5 Dec 2017 05:52:12 +0000 (UTC) From: Peter Xu To: qemu-devel@nongnu.org Date: Tue, 5 Dec 2017 13:51:35 +0800 Message-Id: <20171205055200.16305-2-peterx@redhat.com> In-Reply-To: <20171205055200.16305-1-peterx@redhat.com> References: <20171205055200.16305-1-peterx@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.28]); Tue, 05 Dec 2017 05:52:17 +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] [RFC v5 01/26] qobject: introduce qstring_get_try_str() 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" The only difference from qstring_get_str() is that it allows the qstring to be NULL. If so, NULL is returned. CC: Eric Blake CC: Markus Armbruster Reviewed-by: Fam Zheng Signed-off-by: Peter Xu Reviewed-by: Stefan Hajnoczi --- include/qapi/qmp/qstring.h | 1 + qobject/qstring.c | 10 ++++++++++ 2 files changed, 11 insertions(+) diff --git a/include/qapi/qmp/qstring.h b/include/qapi/qmp/qstring.h index 65c05a9be5..a145c8ca00 100644 --- a/include/qapi/qmp/qstring.h +++ b/include/qapi/qmp/qstring.h @@ -27,6 +27,7 @@ QString *qstring_from_str(const char *str); QString *qstring_from_substr(const char *str, int start, int end); size_t qstring_get_length(const QString *qstring); const char *qstring_get_str(const QString *qstring); +const char *qstring_get_try_str(const QString *qstring); void qstring_append_int(QString *qstring, int64_t value); void qstring_append(QString *qstring, const char *str); void qstring_append_chr(QString *qstring, int c); diff --git a/qobject/qstring.c b/qobject/qstring.c index 74182a1c02..7638ab990d 100644 --- a/qobject/qstring.c +++ b/qobject/qstring.c @@ -128,6 +128,16 @@ const char *qstring_get_str(const QString *qstring) return qstring->string; } =20 +/** + * qstring_get_try_str(): Return a pointer to the stored string + * + * NOTE: will return NULL if qstring is not provided. + */ +const char *qstring_get_try_str(const QString *qstring) +{ + return qstring ? qstring_get_str(qstring) : NULL; +} + /** * qstring_is_equal(): Test whether the two QStrings are equal */ --=20 2.14.3 From nobody Tue Apr 30 15:39:40 2024 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 Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1512453262843201.20163437581675; Mon, 4 Dec 2017 21:54:22 -0800 (PST) Received: from localhost ([::1]:46594 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eM6BN-0003ix-4E for importer@patchew.org; Tue, 05 Dec 2017 00:54:17 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:33224) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eM69a-0002Zu-P0 for qemu-devel@nongnu.org; Tue, 05 Dec 2017 00:52:27 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eM69Y-0000uS-8A for qemu-devel@nongnu.org; Tue, 05 Dec 2017 00:52:26 -0500 Received: from mx1.redhat.com ([209.132.183.28]:37210) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1eM69Y-0000u7-2G for qemu-devel@nongnu.org; Tue, 05 Dec 2017 00:52:24 -0500 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 2F7F3C0587DE; Tue, 5 Dec 2017 05:52:23 +0000 (UTC) Received: from xz-mi.nay.redhat.com (dhcp-14-111.nay.redhat.com [10.66.14.111]) by smtp.corp.redhat.com (Postfix) with ESMTP id BB36B5C54E; Tue, 5 Dec 2017 05:52:17 +0000 (UTC) From: Peter Xu To: qemu-devel@nongnu.org Date: Tue, 5 Dec 2017 13:51:36 +0800 Message-Id: <20171205055200.16305-3-peterx@redhat.com> In-Reply-To: <20171205055200.16305-1-peterx@redhat.com> References: <20171205055200.16305-1-peterx@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.32]); Tue, 05 Dec 2017 05:52:23 +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] [RFC v5 02/26] qobject: introduce qobject_get_try_str() 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" A quick way to fetch string from qobject when it's a QString. Reviewed-by: Fam Zheng Signed-off-by: Peter Xu Reviewed-by: Stefan Hajnoczi --- include/qapi/qmp/qstring.h | 1 + qobject/qstring.c | 11 +++++++++++ 2 files changed, 12 insertions(+) diff --git a/include/qapi/qmp/qstring.h b/include/qapi/qmp/qstring.h index a145c8ca00..6517d8e377 100644 --- a/include/qapi/qmp/qstring.h +++ b/include/qapi/qmp/qstring.h @@ -28,6 +28,7 @@ QString *qstring_from_substr(const char *str, int start, = int end); size_t qstring_get_length(const QString *qstring); const char *qstring_get_str(const QString *qstring); const char *qstring_get_try_str(const QString *qstring); +const char *qobject_get_try_str(const QObject *qstring); void qstring_append_int(QString *qstring, int64_t value); void qstring_append(QString *qstring, const char *str); void qstring_append_chr(QString *qstring, int c); diff --git a/qobject/qstring.c b/qobject/qstring.c index 7638ab990d..fc6834baa6 100644 --- a/qobject/qstring.c +++ b/qobject/qstring.c @@ -138,6 +138,17 @@ const char *qstring_get_try_str(const QString *qstring) return qstring ? qstring_get_str(qstring) : NULL; } =20 +/** + * qobject_get_try_str(): Return a pointer of the backstore string + * + * NOTE: the string will only be returned if the object is valid, and + * its type is QString, otherwise NULL is returned. + */ +const char *qobject_get_try_str(const QObject *qstring) +{ + return qstring_get_try_str(qobject_to_qstring(qstring)); +} + /** * qstring_is_equal(): Test whether the two QStrings are equal */ --=20 2.14.3 From nobody Tue Apr 30 15:39:40 2024 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 Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1512453273050140.3136658911344; Mon, 4 Dec 2017 21:54:33 -0800 (PST) Received: from localhost ([::1]:46596 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eM6Ba-0003vT-AJ for importer@patchew.org; Tue, 05 Dec 2017 00:54:30 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:33312) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eM69m-0002ki-5U for qemu-devel@nongnu.org; Tue, 05 Dec 2017 00:52:38 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eM69j-000120-Kr for qemu-devel@nongnu.org; Tue, 05 Dec 2017 00:52:38 -0500 Received: from mx1.redhat.com ([209.132.183.28]:46346) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1eM69j-00011k-EH for qemu-devel@nongnu.org; Tue, 05 Dec 2017 00:52:35 -0500 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 880927E436; Tue, 5 Dec 2017 05:52:34 +0000 (UTC) Received: from xz-mi.nay.redhat.com (dhcp-14-111.nay.redhat.com [10.66.14.111]) by smtp.corp.redhat.com (Postfix) with ESMTP id A35E965E86; Tue, 5 Dec 2017 05:52:23 +0000 (UTC) From: Peter Xu To: qemu-devel@nongnu.org Date: Tue, 5 Dec 2017 13:51:37 +0800 Message-Id: <20171205055200.16305-4-peterx@redhat.com> In-Reply-To: <20171205055200.16305-1-peterx@redhat.com> References: <20171205055200.16305-1-peterx@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.27]); Tue, 05 Dec 2017 05:52:34 +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] [RFC v5 03/26] qobject: let object_property_get_str() use new API 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" We can simplify object_property_get_str() using the new qobject_get_try_str(). Reviewed-by: Fam Zheng Signed-off-by: Peter Xu Reviewed-by: Stefan Hajnoczi --- qom/object.c | 9 +++------ 1 file changed, 3 insertions(+), 6 deletions(-) diff --git a/qom/object.c b/qom/object.c index c58c52d518..9cbeb51f0b 100644 --- a/qom/object.c +++ b/qom/object.c @@ -1116,18 +1116,15 @@ char *object_property_get_str(Object *obj, const ch= ar *name, Error **errp) { QObject *ret =3D object_property_get_qobject(obj, name, errp); - QString *qstring; char *retval; =20 if (!ret) { return NULL; } - qstring =3D qobject_to_qstring(ret); - if (!qstring) { + + retval =3D g_strdup(qobject_get_try_str(ret)); + if (!retval) { error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "string"); - retval =3D NULL; - } else { - retval =3D g_strdup(qstring_get_str(qstring)); } =20 qobject_decref(ret); --=20 2.14.3 From nobody Tue Apr 30 15:39:40 2024 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 Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1512453412980529.1552723434553; Mon, 4 Dec 2017 21:56:52 -0800 (PST) Received: from localhost ([::1]:46612 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eM6Dp-00064y-Fb for importer@patchew.org; Tue, 05 Dec 2017 00:56:49 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:33347) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eM69q-0002oh-FC for qemu-devel@nongnu.org; Tue, 05 Dec 2017 00:52:43 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eM69p-00017r-JV for qemu-devel@nongnu.org; Tue, 05 Dec 2017 00:52:42 -0500 Received: from mx1.redhat.com ([209.132.183.28]:48262) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1eM69p-00016s-DR for qemu-devel@nongnu.org; Tue, 05 Dec 2017 00:52:41 -0500 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 8092DC047B8B; Tue, 5 Dec 2017 05:52:40 +0000 (UTC) Received: from xz-mi.nay.redhat.com (dhcp-14-111.nay.redhat.com [10.66.14.111]) by smtp.corp.redhat.com (Postfix) with ESMTP id 068AC5C54E; Tue, 5 Dec 2017 05:52:34 +0000 (UTC) From: Peter Xu To: qemu-devel@nongnu.org Date: Tue, 5 Dec 2017 13:51:38 +0800 Message-Id: <20171205055200.16305-5-peterx@redhat.com> In-Reply-To: <20171205055200.16305-1-peterx@redhat.com> References: <20171205055200.16305-1-peterx@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.31]); Tue, 05 Dec 2017 05:52:40 +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] [RFC v5 04/26] monitor: move skip_flush into monitor_data_init 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" It's part of the data init. Collect it. Reviewed-by: Dr. David Alan Gilbert Reviewed-by: Fam Zheng Signed-off-by: Peter Xu Reviewed-by: Stefan Hajnoczi --- monitor.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/monitor.c b/monitor.c index e36fb5308d..3940737c1c 100644 --- a/monitor.c +++ b/monitor.c @@ -568,13 +568,14 @@ static void monitor_qapi_event_init(void) =20 static void handle_hmp_command(Monitor *mon, const char *cmdline); =20 -static void monitor_data_init(Monitor *mon) +static void monitor_data_init(Monitor *mon, bool skip_flush) { memset(mon, 0, sizeof(Monitor)); qemu_mutex_init(&mon->out_lock); mon->outbuf =3D qstring_new(); /* Use *mon_cmds by default. */ mon->cmd_table =3D mon_cmds; + mon->skip_flush =3D skip_flush; } =20 static void monitor_data_destroy(Monitor *mon) @@ -595,8 +596,7 @@ char *qmp_human_monitor_command(const char *command_lin= e, bool has_cpu_index, char *output =3D NULL; Monitor *old_mon, hmp; =20 - monitor_data_init(&hmp); - hmp.skip_flush =3D true; + monitor_data_init(&hmp, true); =20 old_mon =3D cur_mon; cur_mon =3D &hmp; @@ -4089,7 +4089,7 @@ void monitor_init(Chardev *chr, int flags) } =20 mon =3D g_malloc(sizeof(*mon)); - monitor_data_init(mon); + monitor_data_init(mon, false); =20 qemu_chr_fe_init(&mon->chr, chr, &error_abort); mon->flags =3D flags; --=20 2.14.3 From nobody Tue Apr 30 15:39:40 2024 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 Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1512453407030253.88874715654083; Mon, 4 Dec 2017 21:56:47 -0800 (PST) Received: from localhost ([::1]:46610 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eM6Di-0005w0-0R for importer@patchew.org; Tue, 05 Dec 2017 00:56:42 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:33384) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eM69x-0002vQ-CO for qemu-devel@nongnu.org; Tue, 05 Dec 2017 00:52:50 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eM69u-0001Et-ON for qemu-devel@nongnu.org; Tue, 05 Dec 2017 00:52:49 -0500 Received: from mx1.redhat.com ([209.132.183.28]:33128) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1eM69u-0001Dj-FJ for qemu-devel@nongnu.org; Tue, 05 Dec 2017 00:52:46 -0500 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 8C741356E4; Tue, 5 Dec 2017 05:52:45 +0000 (UTC) Received: from xz-mi.nay.redhat.com (dhcp-14-111.nay.redhat.com [10.66.14.111]) by smtp.corp.redhat.com (Postfix) with ESMTP id 017B6171F7; Tue, 5 Dec 2017 05:52:40 +0000 (UTC) From: Peter Xu To: qemu-devel@nongnu.org Date: Tue, 5 Dec 2017 13:51:39 +0800 Message-Id: <20171205055200.16305-6-peterx@redhat.com> In-Reply-To: <20171205055200.16305-1-peterx@redhat.com> References: <20171205055200.16305-1-peterx@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.30]); Tue, 05 Dec 2017 05:52:45 +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] [RFC v5 05/26] qjson: add "opaque" field to JSONMessageParser 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" It'll be passed to emit() as well when it happens. Since at it, add a typedef for the emitter function. Reviewed-by: Fam Zheng Signed-off-by: Peter Xu --- include/qapi/qmp/json-streamer.h | 10 ++++++++-- monitor.c | 7 ++++--- qga/main.c | 5 +++-- qobject/json-streamer.c | 6 ++++-- qobject/qjson.c | 5 +++-- tests/libqtest.c | 5 +++-- 6 files changed, 25 insertions(+), 13 deletions(-) diff --git a/include/qapi/qmp/json-streamer.h b/include/qapi/qmp/json-strea= mer.h index 00d8a23af8..9198b67342 100644 --- a/include/qapi/qmp/json-streamer.h +++ b/include/qapi/qmp/json-streamer.h @@ -23,9 +23,14 @@ typedef struct JSONToken { char str[]; } JSONToken; =20 +struct JSONMessageParser; +typedef void (*JSONMessageEmitFunc)(struct JSONMessageParser *parser, + GQueue *tokens, void *opaque); + typedef struct JSONMessageParser { - void (*emit)(struct JSONMessageParser *parser, GQueue *tokens); + JSONMessageEmitFunc emit; + void *opaque; JSONLexer lexer; int brace_count; int bracket_count; @@ -34,7 +39,8 @@ typedef struct JSONMessageParser } JSONMessageParser; =20 void json_message_parser_init(JSONMessageParser *parser, - void (*func)(JSONMessageParser *, GQueue *)); + JSONMessageEmitFunc func, + void *opaque); =20 int json_message_parser_feed(JSONMessageParser *parser, const char *buffer, size_t size); diff --git a/monitor.c b/monitor.c index 3940737c1c..ab80d32c70 100644 --- a/monitor.c +++ b/monitor.c @@ -3808,7 +3808,8 @@ static int monitor_can_read(void *opaque) return (mon->suspend_cnt =3D=3D 0) ? 1 : 0; } =20 -static void handle_qmp_command(JSONMessageParser *parser, GQueue *tokens) +static void handle_qmp_command(JSONMessageParser *parser, GQueue *tokens, + void *opaque) { QObject *req, *rsp =3D NULL, *id =3D NULL; QDict *qdict =3D NULL; @@ -3955,7 +3956,7 @@ static void monitor_qmp_event(void *opaque, int event) break; case CHR_EVENT_CLOSED: json_message_parser_destroy(&mon->qmp.parser); - json_message_parser_init(&mon->qmp.parser, handle_qmp_command); + json_message_parser_init(&mon->qmp.parser, handle_qmp_command, NUL= L); mon_refcount--; monitor_fdsets_cleanup(); break; @@ -4105,7 +4106,7 @@ void monitor_init(Chardev *chr, int flags) qemu_chr_fe_set_handlers(&mon->chr, monitor_can_read, monitor_qmp_= read, monitor_qmp_event, NULL, mon, NULL, true); qemu_chr_fe_set_echo(&mon->chr, true); - json_message_parser_init(&mon->qmp.parser, handle_qmp_command); + json_message_parser_init(&mon->qmp.parser, handle_qmp_command, NUL= L); } else { qemu_chr_fe_set_handlers(&mon->chr, monitor_can_read, monitor_read, monitor_event, NULL, mon, NULL, true); diff --git a/qga/main.c b/qga/main.c index 62a62755bd..3b5ebbc1ee 100644 --- a/qga/main.c +++ b/qga/main.c @@ -593,7 +593,8 @@ static void process_command(GAState *s, QDict *req) } =20 /* handle requests/control events coming in over the channel */ -static void process_event(JSONMessageParser *parser, GQueue *tokens) +static void process_event(JSONMessageParser *parser, GQueue *tokens, + void *opaque) { GAState *s =3D container_of(parser, GAState, parser); QDict *qdict; @@ -1320,7 +1321,7 @@ static int run_agent(GAState *s, GAConfig *config, in= t socket_activation) s->command_state =3D ga_command_state_new(); ga_command_state_init(s, s->command_state); ga_command_state_init_all(s->command_state); - json_message_parser_init(&s->parser, process_event); + json_message_parser_init(&s->parser, process_event, NULL); =20 #ifndef _WIN32 if (!register_signal_handlers()) { diff --git a/qobject/json-streamer.c b/qobject/json-streamer.c index c51c2021f9..8fc1b15321 100644 --- a/qobject/json-streamer.c +++ b/qobject/json-streamer.c @@ -102,18 +102,20 @@ out_emit: */ tokens =3D parser->tokens; parser->tokens =3D g_queue_new(); - parser->emit(parser, tokens); + parser->emit(parser, tokens, parser->opaque); parser->token_size =3D 0; } =20 void json_message_parser_init(JSONMessageParser *parser, - void (*func)(JSONMessageParser *, GQueue *)) + JSONMessageEmitFunc func, + void *opaque) { parser->emit =3D func; parser->brace_count =3D 0; parser->bracket_count =3D 0; parser->tokens =3D g_queue_new(); parser->token_size =3D 0; + parser->opaque =3D opaque; =20 json_lexer_init(&parser->lexer, json_message_process_token); } diff --git a/qobject/qjson.c b/qobject/qjson.c index 2e0930884e..f9766febe3 100644 --- a/qobject/qjson.c +++ b/qobject/qjson.c @@ -28,7 +28,8 @@ typedef struct JSONParsingState Error *err; } JSONParsingState; =20 -static void parse_json(JSONMessageParser *parser, GQueue *tokens) +static void parse_json(JSONMessageParser *parser, GQueue *tokens, + void *opaque) { JSONParsingState *s =3D container_of(parser, JSONParsingState, parser); =20 @@ -41,7 +42,7 @@ QObject *qobject_from_jsonv(const char *string, va_list *= ap, Error **errp) =20 state.ap =3D ap; =20 - json_message_parser_init(&state.parser, parse_json); + json_message_parser_init(&state.parser, parse_json, NULL); json_message_parser_feed(&state.parser, string, strlen(string)); json_message_parser_flush(&state.parser); json_message_parser_destroy(&state.parser); diff --git a/tests/libqtest.c b/tests/libqtest.c index 0ec8af2923..6e5ddc2ffd 100644 --- a/tests/libqtest.c +++ b/tests/libqtest.c @@ -412,7 +412,8 @@ typedef struct { QDict *response; } QMPResponseParser; =20 -static void qmp_response(JSONMessageParser *parser, GQueue *tokens) +static void qmp_response(JSONMessageParser *parser, GQueue *tokens, + void *opaque) { QMPResponseParser *qmp =3D container_of(parser, QMPResponseParser, par= ser); QObject *obj; @@ -434,7 +435,7 @@ QDict *qmp_fd_receive(int fd) bool log =3D getenv("QTEST_LOG") !=3D NULL; =20 qmp.response =3D NULL; - json_message_parser_init(&qmp.parser, qmp_response); + json_message_parser_init(&qmp.parser, qmp_response, NULL); while (!qmp.response) { ssize_t len; char c; --=20 2.14.3 From nobody Tue Apr 30 15:39:40 2024 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 Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1512453411184210.27012580183361; Mon, 4 Dec 2017 21:56:51 -0800 (PST) Received: from localhost ([::1]:46611 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eM6Dh-0005wo-52 for importer@patchew.org; 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Tue, 5 Dec 2017 05:52:45 +0000 (UTC) From: Peter Xu To: qemu-devel@nongnu.org Date: Tue, 5 Dec 2017 13:51:40 +0800 Message-Id: <20171205055200.16305-7-peterx@redhat.com> In-Reply-To: <20171205055200.16305-1-peterx@redhat.com> References: <20171205055200.16305-1-peterx@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.32]); Tue, 05 Dec 2017 05:52:54 +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] [RFC v5 06/26] monitor: move the cur_mon hack deeper for QMP 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" In monitor_qmp_read(), we have the hack to temporarily replace the cur_mon pointer. Now we move this hack deeper inside the QMP dispatcher routine since the Monitor pointer can be passed in to that using the new JSON Parser opaque field now. This does not make much sense as a single patch. However, this will be a big step for the next patch, when the QMP dispatcher routine will be split from the QMP parser. Reviewed-by: Eric Blake Reviewed-by: Fam Zheng Signed-off-by: Peter Xu --- monitor.c | 19 ++++++++++--------- 1 file changed, 10 insertions(+), 9 deletions(-) diff --git a/monitor.c b/monitor.c index ab80d32c70..322dfb5f31 100644 --- a/monitor.c +++ b/monitor.c @@ -3813,7 +3813,7 @@ static void handle_qmp_command(JSONMessageParser *par= ser, GQueue *tokens, { QObject *req, *rsp =3D NULL, *id =3D NULL; QDict *qdict =3D NULL; - Monitor *mon =3D cur_mon; + Monitor *mon =3D opaque, *old_mon; Error *err =3D NULL; =20 req =3D json_parser_parse_err(tokens, NULL, &err); @@ -3838,8 +3838,13 @@ static void handle_qmp_command(JSONMessageParser *pa= rser, GQueue *tokens, QDECREF(req_json); } =20 + old_mon =3D cur_mon; + cur_mon =3D mon; + rsp =3D qmp_dispatch(cur_mon->qmp.commands, req); =20 + cur_mon =3D old_mon; + if (mon->qmp.commands =3D=3D &qmp_cap_negotiation_commands) { qdict =3D qdict_get_qdict(qobject_to_qdict(rsp), "error"); if (qdict @@ -3876,13 +3881,9 @@ err_out: =20 static void monitor_qmp_read(void *opaque, const uint8_t *buf, int size) { - Monitor *old_mon =3D cur_mon; - - cur_mon =3D opaque; - - json_message_parser_feed(&cur_mon->qmp.parser, (const char *) buf, siz= e); + Monitor *mon =3D opaque; =20 - cur_mon =3D old_mon; + json_message_parser_feed(&mon->qmp.parser, (const char *) buf, size); } =20 static void monitor_read(void *opaque, const uint8_t *buf, int size) @@ -3956,7 +3957,7 @@ static void monitor_qmp_event(void *opaque, int event) break; case CHR_EVENT_CLOSED: json_message_parser_destroy(&mon->qmp.parser); - json_message_parser_init(&mon->qmp.parser, handle_qmp_command, NUL= L); + json_message_parser_init(&mon->qmp.parser, handle_qmp_command, mon= ); mon_refcount--; monitor_fdsets_cleanup(); break; @@ -4106,7 +4107,7 @@ void monitor_init(Chardev *chr, int flags) qemu_chr_fe_set_handlers(&mon->chr, monitor_can_read, monitor_qmp_= read, monitor_qmp_event, NULL, mon, NULL, true); qemu_chr_fe_set_echo(&mon->chr, true); - json_message_parser_init(&mon->qmp.parser, handle_qmp_command, NUL= L); + json_message_parser_init(&mon->qmp.parser, handle_qmp_command, mon= ); } else { qemu_chr_fe_set_handlers(&mon->chr, monitor_can_read, monitor_read, monitor_event, NULL, mon, NULL, true); --=20 2.14.3 From nobody Tue Apr 30 15:39:40 2024 Delivered-To: importer@patchew.org Received-SPF: temperror (zoho.com: Error in retrieving data from DNS) 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=temperror (zoho.com: Error in retrieving data from DNS) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (208.118.235.17 [208.118.235.17]) by mx.zohomail.com with SMTPS id 1512453572523780.2116770349071; Mon, 4 Dec 2017 21:59:32 -0800 (PST) Received: from localhost ([::1]:46625 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eM6GH-0001jq-Hw for importer@patchew.org; Tue, 05 Dec 2017 00:59:21 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:33455) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eM6A8-00034n-Rs for qemu-devel@nongnu.org; Tue, 05 Dec 2017 00:53:03 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eM6A8-0001cM-1N for qemu-devel@nongnu.org; Tue, 05 Dec 2017 00:53:00 -0500 Received: from mx1.redhat.com ([209.132.183.28]:60476) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1eM6A7-0001bA-OT for qemu-devel@nongnu.org; Tue, 05 Dec 2017 00:52:59 -0500 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id D72094E33B; Tue, 5 Dec 2017 05:52:58 +0000 (UTC) Received: from xz-mi.nay.redhat.com (dhcp-14-111.nay.redhat.com [10.66.14.111]) by smtp.corp.redhat.com (Postfix) with ESMTP id C51A75C54E; Tue, 5 Dec 2017 05:52:54 +0000 (UTC) From: Peter Xu To: qemu-devel@nongnu.org Date: Tue, 5 Dec 2017 13:51:41 +0800 Message-Id: <20171205055200.16305-8-peterx@redhat.com> In-Reply-To: <20171205055200.16305-1-peterx@redhat.com> References: <20171205055200.16305-1-peterx@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.38]); Tue, 05 Dec 2017 05:52:58 +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] [RFC v5 07/26] monitor: unify global init 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_6 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" There are many places for monitor init its globals, at least: - monitor_init_qmp_commands() at the very beginning - single function to init monitor_lock - in the first entry of monitor_init() using "is_first_init" Unify them a bit. Reviewed-by: Fam Zheng Signed-off-by: Peter Xu --- include/monitor/monitor.h | 2 +- monitor.c | 25 ++++++++++--------------- vl.c | 3 ++- 3 files changed, 13 insertions(+), 17 deletions(-) diff --git a/include/monitor/monitor.h b/include/monitor/monitor.h index 83ea4a1aaf..3a5128ab1b 100644 --- a/include/monitor/monitor.h +++ b/include/monitor/monitor.h @@ -16,7 +16,7 @@ extern Monitor *cur_mon; =20 bool monitor_cur_is_qmp(void); =20 -void monitor_init_qmp_commands(void); +void monitor_init_globals(void); void monitor_init(Chardev *chr, int flags); void monitor_cleanup(void); =20 diff --git a/monitor.c b/monitor.c index 322dfb5f31..ac5313023b 100644 --- a/monitor.c +++ b/monitor.c @@ -1001,7 +1001,7 @@ static void qmp_unregister_commands_hack(void) #endif } =20 -void monitor_init_qmp_commands(void) +static void monitor_init_qmp_commands(void) { /* * Two command lists: @@ -4034,6 +4034,14 @@ static void sortcmdlist(void) qsort((void *)info_cmds, array_num, elem_size, compare_mon_cmd); } =20 +void monitor_init_globals(void) +{ + monitor_init_qmp_commands(); + monitor_qapi_event_init(); + sortcmdlist(); + qemu_mutex_init(&monitor_lock); +} + /* These functions just adapt the readline interface in a typesafe way. We * could cast function pointers but that discards compiler checks. */ @@ -4074,23 +4082,10 @@ void error_vprintf_unless_qmp(const char *fmt, va_l= ist ap) } } =20 -static void __attribute__((constructor)) monitor_lock_init(void) -{ - qemu_mutex_init(&monitor_lock); -} - void monitor_init(Chardev *chr, int flags) { - static int is_first_init =3D 1; - Monitor *mon; - - if (is_first_init) { - monitor_qapi_event_init(); - sortcmdlist(); - is_first_init =3D 0; - } + Monitor *mon =3D g_malloc(sizeof(*mon)); =20 - mon =3D g_malloc(sizeof(*mon)); monitor_data_init(mon, false); =20 qemu_chr_fe_init(&mon->chr, chr, &error_abort); diff --git a/vl.c b/vl.c index 1ad1c04637..1ec995a6ae 100644 --- a/vl.c +++ b/vl.c @@ -3144,7 +3144,6 @@ int main(int argc, char **argv, char **envp) qemu_init_exec_dir(argv[0]); =20 module_call_init(MODULE_INIT_QOM); - monitor_init_qmp_commands(); =20 qemu_add_opts(&qemu_drive_opts); qemu_add_drive_opts(&qemu_legacy_drive_opts); @@ -4690,6 +4689,8 @@ int main(int argc, char **argv, char **envp) default_drive(default_floppy, snapshot, IF_FLOPPY, 0, FD_OPTS); default_drive(default_sdcard, snapshot, IF_SD, 0, SD_OPTS); =20 + monitor_init_globals(); + if (qemu_opts_foreach(qemu_find_opts("mon"), mon_init_func, NULL, NULL)) { exit(1); --=20 2.14.3 From nobody Tue Apr 30 15:39:40 2024 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 Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1512453428283565.2785423293573; Mon, 4 Dec 2017 21:57:08 -0800 (PST) Received: from localhost ([::1]:46613 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eM6E5-0006KP-Hn for importer@patchew.org; Tue, 05 Dec 2017 00:57:05 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:33500) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eM6AF-00038V-6u for qemu-devel@nongnu.org; Tue, 05 Dec 2017 00:53:08 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eM6AC-0001gG-Lm for qemu-devel@nongnu.org; Tue, 05 Dec 2017 00:53:07 -0500 Received: from mx1.redhat.com ([209.132.183.28]:46538) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1eM6AC-0001eM-Ew for qemu-devel@nongnu.org; Tue, 05 Dec 2017 00:53:04 -0500 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 877D4780D0; Tue, 5 Dec 2017 05:53:03 +0000 (UTC) Received: from xz-mi.nay.redhat.com (dhcp-14-111.nay.redhat.com [10.66.14.111]) by smtp.corp.redhat.com (Postfix) with ESMTP id 5775A6375C; Tue, 5 Dec 2017 05:52:59 +0000 (UTC) From: Peter Xu To: qemu-devel@nongnu.org Date: Tue, 5 Dec 2017 13:51:42 +0800 Message-Id: <20171205055200.16305-9-peterx@redhat.com> In-Reply-To: <20171205055200.16305-1-peterx@redhat.com> References: <20171205055200.16305-1-peterx@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.27]); Tue, 05 Dec 2017 05:53:03 +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] [RFC v5 08/26] monitor: let mon_list be tail queue 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" It was QLIST. I want to use this list to do monitor priority job later, which need tail insertion ability. So switching to a tail queue. Reviewed-by: Fam Zheng Signed-off-by: Peter Xu Reviewed-by: Stefan Hajnoczi --- monitor.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/monitor.c b/monitor.c index ac5313023b..a70ab5606b 100644 --- a/monitor.c +++ b/monitor.c @@ -205,7 +205,7 @@ struct Monitor { void *password_opaque; mon_cmd_t *cmd_table; QLIST_HEAD(,mon_fd_t) fds; - QLIST_ENTRY(Monitor) entry; + QTAILQ_ENTRY(Monitor) entry; }; =20 /* QMP checker flags */ @@ -214,7 +214,7 @@ struct Monitor { /* Protects mon_list, monitor_event_state. */ static QemuMutex monitor_lock; =20 -static QLIST_HEAD(mon_list, Monitor) mon_list; +static QTAILQ_HEAD(mon_list, Monitor) mon_list; static QLIST_HEAD(mon_fdsets, MonFdset) mon_fdsets; static int mon_refcount; =20 @@ -415,7 +415,7 @@ static void monitor_qapi_event_emit(QAPIEvent event, QD= ict *qdict) Monitor *mon; =20 trace_monitor_protocol_event_emit(event, qdict); - QLIST_FOREACH(mon, &mon_list, entry) { + QTAILQ_FOREACH(mon, &mon_list, entry) { if (monitor_is_qmp(mon) && mon->qmp.commands !=3D &qmp_cap_negotiation_commands) { monitor_json_emitter(mon, QOBJECT(qdict)); @@ -4118,8 +4118,8 @@ void monitor_cleanup(void) Monitor *mon, *next; =20 qemu_mutex_lock(&monitor_lock); - QLIST_FOREACH_SAFE(mon, &mon_list, entry, next) { - QLIST_REMOVE(mon, entry); + QTAILQ_FOREACH_SAFE(mon, &mon_list, entry, next) { + QTAILQ_REMOVE(&mon_list, mon, entry); monitor_data_destroy(mon); g_free(mon); } --=20 2.14.3 From nobody Tue Apr 30 15:39:40 2024 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 Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 15124536420491012.8361632869796; Mon, 4 Dec 2017 22:00:42 -0800 (PST) Received: from localhost ([::1]:46632 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eM6HX-0002nb-6e for importer@patchew.org; Tue, 05 Dec 2017 01:00:39 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:33597) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eM6AQ-0003Jc-Do for qemu-devel@nongnu.org; Tue, 05 Dec 2017 00:53:19 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eM6AP-0001u2-JH for qemu-devel@nongnu.org; Tue, 05 Dec 2017 00:53:18 -0500 Received: from mx1.redhat.com ([209.132.183.28]:60576) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1eM6AP-0001tJ-Cu for qemu-devel@nongnu.org; Tue, 05 Dec 2017 00:53:17 -0500 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 7F8174E4C6; Tue, 5 Dec 2017 05:53:16 +0000 (UTC) Received: from xz-mi.nay.redhat.com (dhcp-14-111.nay.redhat.com [10.66.14.111]) by smtp.corp.redhat.com (Postfix) with ESMTP id 07D285C54E; Tue, 5 Dec 2017 05:53:03 +0000 (UTC) From: Peter Xu To: qemu-devel@nongnu.org Date: Tue, 5 Dec 2017 13:51:43 +0800 Message-Id: <20171205055200.16305-10-peterx@redhat.com> In-Reply-To: <20171205055200.16305-1-peterx@redhat.com> References: <20171205055200.16305-1-peterx@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.38]); Tue, 05 Dec 2017 05:53:16 +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] [RFC v5 09/26] monitor: create monitor dedicate iothread 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" Create one IOThread for the monitors, prepared to handle all the input/output IOs using existing iothread framework. Signed-off-by: Peter Xu --- monitor.c | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) diff --git a/monitor.c b/monitor.c index a70ab5606b..6b60f6d91b 100644 --- a/monitor.c +++ b/monitor.c @@ -76,6 +76,7 @@ #include "qmp-introspect.h" #include "sysemu/qtest.h" #include "sysemu/cpus.h" +#include "sysemu/iothread.h" #include "qemu/cutils.h" #include "qapi/qmp/dispatch.h" =20 @@ -208,6 +209,12 @@ struct Monitor { QTAILQ_ENTRY(Monitor) entry; }; =20 +struct MonitorGlobal { + IOThread *mon_iothread; +}; + +static struct MonitorGlobal mon_global; + /* QMP checker flags */ #define QMP_ACCEPT_UNKNOWNS 1 =20 @@ -4034,12 +4041,24 @@ static void sortcmdlist(void) qsort((void *)info_cmds, array_num, elem_size, compare_mon_cmd); } =20 +static GMainContext *monitor_io_context_get(void) +{ + return iothread_get_g_main_context(mon_global.mon_iothread); +} + +static void monitor_iothread_init(void) +{ + mon_global.mon_iothread =3D iothread_create("mon_iothread", + &error_abort); +} + void monitor_init_globals(void) { monitor_init_qmp_commands(); monitor_qapi_event_init(); sortcmdlist(); qemu_mutex_init(&monitor_lock); + monitor_iothread_init(); } =20 /* These functions just adapt the readline interface in a typesafe way. We @@ -4117,6 +4136,16 @@ void monitor_cleanup(void) { Monitor *mon, *next; =20 + /* + * We need to explicitly stop the iothread (but not destroy it), + * cleanup the monitor resources, then destroy the iothread. See + * again on the glib bug mentioned in 2b316774f6 for a reason. + * + * TODO: the bug is fixed in glib 2.28, so we can remove this hack + * as long as we won't support glib versions older than it. + */ + iothread_stop(mon_global.mon_iothread); + qemu_mutex_lock(&monitor_lock); QTAILQ_FOREACH_SAFE(mon, &mon_list, entry, next) { QTAILQ_REMOVE(&mon_list, mon, entry); @@ -4124,6 +4153,9 @@ void monitor_cleanup(void) g_free(mon); } qemu_mutex_unlock(&monitor_lock); + + iothread_destroy(mon_global.mon_iothread); + mon_global.mon_iothread =3D NULL; } =20 QemuOptsList qemu_mon_opts =3D { --=20 2.14.3 From nobody Tue Apr 30 15:39:40 2024 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 Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1512453824459565.1161505328; Mon, 4 Dec 2017 22:03:44 -0800 (PST) Received: from localhost ([::1]:46654 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eM6KR-0005Jd-IN for importer@patchew.org; Tue, 05 Dec 2017 01:03:39 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:33645) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eM6AW-0003P8-4h for qemu-devel@nongnu.org; Tue, 05 Dec 2017 00:53:25 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eM6AV-0001wD-2R for qemu-devel@nongnu.org; Tue, 05 Dec 2017 00:53:24 -0500 Received: from mx1.redhat.com ([209.132.183.28]:57696) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1eM6AU-0001vk-QE for qemu-devel@nongnu.org; Tue, 05 Dec 2017 00:53:22 -0500 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id E0757859FA; Tue, 5 Dec 2017 05:53:21 +0000 (UTC) Received: from xz-mi.nay.redhat.com (dhcp-14-111.nay.redhat.com [10.66.14.111]) by smtp.corp.redhat.com (Postfix) with ESMTP id 042515C54E; Tue, 5 Dec 2017 05:53:16 +0000 (UTC) From: Peter Xu To: qemu-devel@nongnu.org Date: Tue, 5 Dec 2017 13:51:44 +0800 Message-Id: <20171205055200.16305-11-peterx@redhat.com> In-Reply-To: <20171205055200.16305-1-peterx@redhat.com> References: <20171205055200.16305-1-peterx@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.26]); Tue, 05 Dec 2017 05:53:21 +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] [RFC v5 10/26] monitor: allow to use IO thread for parsing 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" For each Monitor, add one field "use_io_thr" to show whether it will be using the dedicated monitor IO thread to handle input/output. When set, monitor IO parsing work will be offloaded to dedicated monitor IO thread, rather than the original main loop thread. This only works for QMP. HMP will always be run on main loop thread. Currently we're still keeping use_io_thr to off always. Will turn it on later at some point. One thing to mention is that we cannot set use_io_thr for every QMP monitors. The problem is that MUXed typed chardevs may not work well with it now. When MUX is used, frontend of chardev can be the monitor plus something else. The only thing we know would be safe to be run outside main thread so far is the monitor frontend. All the rest of the frontends should still be run in main thread only. Reviewed-by: Fam Zheng Signed-off-by: Peter Xu --- monitor.c | 38 ++++++++++++++++++++++++++++++-------- 1 file changed, 30 insertions(+), 8 deletions(-) diff --git a/monitor.c b/monitor.c index 6b60f6d91b..e8f5a586e4 100644 --- a/monitor.c +++ b/monitor.c @@ -191,6 +191,7 @@ struct Monitor { int flags; int suspend_cnt; bool skip_flush; + bool use_io_thr; =20 QemuMutex out_lock; QString *outbuf; @@ -575,7 +576,8 @@ static void monitor_qapi_event_init(void) =20 static void handle_hmp_command(Monitor *mon, const char *cmdline); =20 -static void monitor_data_init(Monitor *mon, bool skip_flush) +static void monitor_data_init(Monitor *mon, bool skip_flush, + bool use_io_thr) { memset(mon, 0, sizeof(Monitor)); qemu_mutex_init(&mon->out_lock); @@ -583,6 +585,7 @@ static void monitor_data_init(Monitor *mon, bool skip_f= lush) /* Use *mon_cmds by default. */ mon->cmd_table =3D mon_cmds; mon->skip_flush =3D skip_flush; + mon->use_io_thr =3D use_io_thr; } =20 static void monitor_data_destroy(Monitor *mon) @@ -603,7 +606,7 @@ char *qmp_human_monitor_command(const char *command_lin= e, bool has_cpu_index, char *output =3D NULL; Monitor *old_mon, hmp; =20 - monitor_data_init(&hmp, true); + monitor_data_init(&hmp, true, false); =20 old_mon =3D cur_mon; cur_mon =3D &hmp; @@ -4104,8 +4107,9 @@ void error_vprintf_unless_qmp(const char *fmt, va_lis= t ap) void monitor_init(Chardev *chr, int flags) { Monitor *mon =3D g_malloc(sizeof(*mon)); + GMainContext *context; =20 - monitor_data_init(mon, false); + monitor_data_init(mon, false, false); =20 qemu_chr_fe_init(&mon->chr, chr, &error_abort); mon->flags =3D flags; @@ -4117,19 +4121,37 @@ void monitor_init(Chardev *chr, int flags) monitor_read_command(mon, 0); } =20 + if (mon->use_io_thr) { + /* + * When use_io_thr is set, we use the global shared dedicated + * IO thread for this monitor to handle input/output. + */ + context =3D monitor_io_context_get(); + /* We should have inited globals before reaching here. */ + assert(context); + } else { + /* The default main loop, which is the main thread */ + context =3D NULL; + } + + /* + * Add the monitor before running it (which is triggered by + * qemu_chr_fe_set_handlers), otherwise one monitor may find + * itself not on the mon_list when running. + */ + qemu_mutex_lock(&monitor_lock); + QTAILQ_INSERT_HEAD(&mon_list, mon, entry); + qemu_mutex_unlock(&monitor_lock); + if (monitor_is_qmp(mon)) { qemu_chr_fe_set_handlers(&mon->chr, monitor_can_read, monitor_qmp_= read, - monitor_qmp_event, NULL, mon, NULL, true); + monitor_qmp_event, NULL, mon, context, tr= ue); qemu_chr_fe_set_echo(&mon->chr, true); json_message_parser_init(&mon->qmp.parser, handle_qmp_command, mon= ); } else { qemu_chr_fe_set_handlers(&mon->chr, monitor_can_read, monitor_read, monitor_event, NULL, mon, NULL, true); } - - qemu_mutex_lock(&monitor_lock); - QLIST_INSERT_HEAD(&mon_list, mon, entry); - qemu_mutex_unlock(&monitor_lock); } =20 void monitor_cleanup(void) --=20 2.14.3 From nobody Tue Apr 30 15:39:40 2024 Delivered-To: importer@patchew.org Received-SPF: temperror (zoho.com: Error in retrieving data from DNS) 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=temperror (zoho.com: Error in retrieving data from DNS) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (208.118.235.17 [208.118.235.17]) by mx.zohomail.com with SMTPS id 1512453572499466.7074954007528; 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Tue, 5 Dec 2017 05:53:34 +0000 (UTC) Received: from xz-mi.nay.redhat.com (dhcp-14-111.nay.redhat.com [10.66.14.111]) by smtp.corp.redhat.com (Postfix) with ESMTP id 6239B5C54E; Tue, 5 Dec 2017 05:53:22 +0000 (UTC) From: Peter Xu To: qemu-devel@nongnu.org Date: Tue, 5 Dec 2017 13:51:45 +0800 Message-Id: <20171205055200.16305-12-peterx@redhat.com> In-Reply-To: <20171205055200.16305-1-peterx@redhat.com> References: <20171205055200.16305-1-peterx@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.25]); Tue, 05 Dec 2017 05:53:34 +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] [RFC v5 11/26] qmp: introduce QMPCapability 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_6 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" There was no QMP capabilities defined. Define the first "oob" as capability to allow out-of-band messages. Also, touch up qmp-test.c to test the new bits. Signed-off-by: Peter Xu --- monitor.c | 15 +++++++++++++-- qapi-schema.json | 13 +++++++++++++ tests/qmp-test.c | 10 +++++++++- 3 files changed, 35 insertions(+), 3 deletions(-) diff --git a/monitor.c b/monitor.c index e8f5a586e4..bad6ee8dd1 100644 --- a/monitor.c +++ b/monitor.c @@ -3944,12 +3944,23 @@ void monitor_resume(Monitor *mon) =20 static QObject *get_qmp_greeting(void) { + QDict *result =3D qdict_new(), *qmp =3D qdict_new(); + QList *cap_list =3D qlist_new(); QObject *ver =3D NULL; + QMPCapability cap; + + qdict_put(result, "QMP", qmp); =20 qmp_marshal_query_version(NULL, &ver, NULL); + qdict_put_obj(qmp, "version", ver); + + for (cap =3D 0; cap < QMP_CAPABILITY__MAX; cap++) { + qlist_append(cap_list, qstring_from_str( + QMPCapability_str(cap))); + } + qdict_put(qmp, "capabilities", cap_list); =20 - return qobject_from_jsonf("{'QMP': {'version': %p, 'capabilities': []}= }", - ver); + return QOBJECT(result); } =20 static void monitor_qmp_event(void *opaque, int event) diff --git a/qapi-schema.json b/qapi-schema.json index 18457954a8..03201578b4 100644 --- a/qapi-schema.json +++ b/qapi-schema.json @@ -118,6 +118,19 @@ ## { 'command': 'qmp_capabilities' } =20 +## +# @QMPCapability: +# +# QMP supported capabilities to be broadcasted to the clients. +# +# @oob: QMP ability to support Out-Of-Band requests. +# +# Since: 2.12 +# +## +{ 'enum': 'QMPCapability', + 'data': [ 'oob' ] } + ## # @VersionTriple: # diff --git a/tests/qmp-test.c b/tests/qmp-test.c index c5a5c10b41..292c5f135a 100644 --- a/tests/qmp-test.c +++ b/tests/qmp-test.c @@ -17,6 +17,7 @@ #include "qapi/qobject-input-visitor.h" #include "qapi/util.h" #include "qapi/visitor.h" +#include "qapi/qmp/qstring.h" =20 const char common_args[] =3D "-nodefaults -machine none"; =20 @@ -75,6 +76,8 @@ static void test_qmp_protocol(void) { QDict *resp, *q, *ret; QList *capabilities; + const QListEntry *entry; + QString *qstr; =20 global_qtest =3D qtest_init_without_qmp_handshake(common_args); =20 @@ -84,7 +87,12 @@ static void test_qmp_protocol(void) g_assert(q); test_version(qdict_get(q, "version")); capabilities =3D qdict_get_qlist(q, "capabilities"); - g_assert(capabilities && qlist_empty(capabilities)); + g_assert(capabilities); + entry =3D qlist_first(capabilities); + g_assert(entry); + qstr =3D qobject_to_qstring(entry->value); + g_assert(qstr); + g_assert_cmpstr(qstring_get_str(qstr), =3D=3D, "oob"); QDECREF(resp); =20 /* Test valid command before handshake */ --=20 2.14.3 From nobody Tue Apr 30 15:39:40 2024 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 Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1512453747047518.2105889230947; Mon, 4 Dec 2017 22:02:27 -0800 (PST) Received: from localhost ([::1]:46648 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eM6JD-0004AK-63 for importer@patchew.org; Tue, 05 Dec 2017 01:02:23 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:33820) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eM6Aq-0003fx-6k for qemu-devel@nongnu.org; Tue, 05 Dec 2017 00:53:46 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eM6Ap-00024g-6M for qemu-devel@nongnu.org; Tue, 05 Dec 2017 00:53:44 -0500 Received: from mx1.redhat.com ([209.132.183.28]:56942) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1eM6Ao-00024O-Tv for qemu-devel@nongnu.org; Tue, 05 Dec 2017 00:53:43 -0500 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 0B2F979704; Tue, 5 Dec 2017 05:53:42 +0000 (UTC) Received: from xz-mi.nay.redhat.com (dhcp-14-111.nay.redhat.com [10.66.14.111]) by smtp.corp.redhat.com (Postfix) with ESMTP id 6AFE061783; Tue, 5 Dec 2017 05:53:35 +0000 (UTC) From: Peter Xu To: qemu-devel@nongnu.org Date: Tue, 5 Dec 2017 13:51:46 +0800 Message-Id: <20171205055200.16305-13-peterx@redhat.com> In-Reply-To: <20171205055200.16305-1-peterx@redhat.com> References: <20171205055200.16305-1-peterx@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.25]); Tue, 05 Dec 2017 05:53:42 +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] [RFC v5 12/26] qmp: negociate QMP capabilities 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" After this patch, we will allow QMP clients to enable QMP capabilities when sending the first "qmp_capabilities" command. Originally we are starting QMP session with no arguments like: { "execute": "qmp_capabilities" } Now we can enable some QMP capabilities using (take OOB as example, which is the only one capability that we support): { "execute": "qmp_capabilities", "argument": { "enable": [ "oob" ] } } When the "argument" key is not provided, no capability is enabled. For capability "oob", the monitor needs to be run on dedicated IO thread, otherwise the command will fail. For example, trying to enable OOB on a MUXed typed QMP monitor will fail. One thing to mention is that, QMP capabilities are per-monitor, and also when the connection is closed due to some reason, the capabilities will be reset. Signed-off-by: Peter Xu Reviewed-by: Dr. David Alan Gilbert --- monitor.c | 57 ++++++++++++++++++++++++++++++++++++++++++++++++++++= +++- qapi-schema.json | 15 ++++++++++++--- 2 files changed, 68 insertions(+), 4 deletions(-) diff --git a/monitor.c b/monitor.c index bad6ee8dd1..097312e65f 100644 --- a/monitor.c +++ b/monitor.c @@ -167,6 +167,7 @@ typedef struct { * mode. */ QmpCommandList *commands; + bool qmp_caps[QMP_CAPABILITY__MAX]; } MonitorQMP; =20 /* @@ -1037,8 +1038,42 @@ static void monitor_init_qmp_commands(void) qmp_marshal_qmp_capabilities, QCO_NO_OPTIONS); } =20 -void qmp_qmp_capabilities(Error **errp) +static void qmp_caps_check(Monitor *mon, QMPCapabilityList *list, + Error **errp) +{ + for (; list; list =3D list->next) { + assert(list->value < QMP_CAPABILITY__MAX); + switch (list->value) { + case QMP_CAPABILITY_OOB: + if (!mon->use_io_thr) { + /* + * Out-Of-Band only works with monitors that are + * running on dedicated IOThread. + */ + error_setg(errp, "This monitor does not support " + "Out-Of-Band (OOB)"); + return; + } + break; + default: + break; + } + } +} + +/* This function should only be called after capabilities are checked. */ +static void qmp_caps_apply(Monitor *mon, QMPCapabilityList *list) +{ + for (; list; list =3D list->next) { + mon->qmp.qmp_caps[list->value] =3D true; + } +} + +void qmp_qmp_capabilities(bool has_enable, QMPCapabilityList *enable, + Error **errp) { + Error *local_err =3D NULL; + if (cur_mon->qmp.commands =3D=3D &qmp_commands) { error_set(errp, ERROR_CLASS_COMMAND_NOT_FOUND, "Capabilities negotiation is already complete, command " @@ -1046,6 +1081,20 @@ void qmp_qmp_capabilities(Error **errp) return; } =20 + /* Enable QMP capabilities provided by the guest if applicable. */ + if (has_enable) { + qmp_caps_check(cur_mon, enable, &local_err); + if (local_err) { + /* + * Failed check on either of the capabilities will fail + * the apply of all. + */ + error_propagate(errp, local_err); + return; + } + qmp_caps_apply(cur_mon, enable); + } + cur_mon->qmp.commands =3D &qmp_commands; } =20 @@ -3963,6 +4012,11 @@ static QObject *get_qmp_greeting(void) return QOBJECT(result); } =20 +static void monitor_qmp_caps_reset(Monitor *mon) +{ + memset(mon->qmp.qmp_caps, 0, sizeof(mon->qmp.qmp_caps)); +} + static void monitor_qmp_event(void *opaque, int event) { QObject *data; @@ -3971,6 +4025,7 @@ static void monitor_qmp_event(void *opaque, int event) switch (event) { case CHR_EVENT_OPENED: mon->qmp.commands =3D &qmp_cap_negotiation_commands; + monitor_qmp_caps_reset(mon); data =3D get_qmp_greeting(); monitor_json_emitter(mon, data); qobject_decref(data); diff --git a/qapi-schema.json b/qapi-schema.json index 03201578b4..531fd4c0db 100644 --- a/qapi-schema.json +++ b/qapi-schema.json @@ -102,21 +102,30 @@ # # Enable QMP capabilities. # -# Arguments: None. +# Arguments: +# +# @enable: List of QMPCapabilities to enable, which is optional. +# If not provided, it means no QMP capabilities will be +# enabled. (since 2.12) # # Example: # -# -> { "execute": "qmp_capabilities" } +# -> { "execute": "qmp_capabilities", +# "arguments": { "enable": [ "oob" ] } } # <- { "return": {} } # # Notes: This command is valid exactly when first connecting: it must be # issued before any other command will be accepted, and will fail once the # monitor is accepting other commands. (see qemu docs/interop/qmp-spec.txt) # +# QMP client needs to explicitly enable QMP capabilities, otherwise +# all the QMP capabilities will be turned off by default. +# # Since: 0.13 # ## -{ 'command': 'qmp_capabilities' } +{ 'command': 'qmp_capabilities', + 'data': { '*enable': [ 'QMPCapability' ] } } =20 ## # @QMPCapability: --=20 2.14.3 From nobody Tue Apr 30 15:39:40 2024 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 Return-Path: Received: from lists.gnu.org (208.118.235.17 [208.118.235.17]) by mx.zohomail.com with SMTPS id 1512453891814675.0992169265379; Mon, 4 Dec 2017 22:04:51 -0800 (PST) Received: from localhost ([::1]:46657 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eM6LQ-0006RM-Mk for importer@patchew.org; Tue, 05 Dec 2017 01:04:40 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:33864) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eM6Au-0003jZ-6T for qemu-devel@nongnu.org; Tue, 05 Dec 2017 00:53:48 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eM6At-00026I-HI for qemu-devel@nongnu.org; Tue, 05 Dec 2017 00:53:48 -0500 Received: from mx1.redhat.com ([209.132.183.28]:47450) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1eM6At-00025w-B1 for qemu-devel@nongnu.org; Tue, 05 Dec 2017 00:53:47 -0500 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 65C71BDCD; Tue, 5 Dec 2017 05:53:46 +0000 (UTC) Received: from xz-mi.nay.redhat.com (dhcp-14-111.nay.redhat.com [10.66.14.111]) by smtp.corp.redhat.com (Postfix) with ESMTP id 803BE5C54E; Tue, 5 Dec 2017 05:53:42 +0000 (UTC) From: Peter Xu To: qemu-devel@nongnu.org Date: Tue, 5 Dec 2017 13:51:47 +0800 Message-Id: <20171205055200.16305-14-peterx@redhat.com> In-Reply-To: <20171205055200.16305-1-peterx@redhat.com> References: <20171205055200.16305-1-peterx@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.29]); Tue, 05 Dec 2017 05:53:46 +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] [RFC v5 13/26] qmp: introduce some capability helpers 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" Introduce qmp_cap_enabled() and qmp_oob_enabled() helpers. Signed-off-by: Peter Xu Reviewed-by: Dr. David Alan Gilbert Reviewed-by: Stefan Hajnoczi --- monitor.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/monitor.c b/monitor.c index 097312e65f..9666115259 100644 --- a/monitor.c +++ b/monitor.c @@ -1038,6 +1038,16 @@ static void monitor_init_qmp_commands(void) qmp_marshal_qmp_capabilities, QCO_NO_OPTIONS); } =20 +static bool qmp_cap_enabled(Monitor *mon, QMPCapability cap) +{ + return mon->qmp.qmp_caps[cap]; +} + +static bool qmp_oob_enabled(Monitor *mon) +{ + return qmp_cap_enabled(mon, QMP_CAPABILITY_OOB); +} + static void qmp_caps_check(Monitor *mon, QMPCapabilityList *list, Error **errp) { --=20 2.14.3 From nobody Tue Apr 30 15:39:40 2024 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 Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1512453990345970.7910192228405; Mon, 4 Dec 2017 22:06:30 -0800 (PST) Received: from localhost ([::1]:46671 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eM6N9-0007yw-GQ for importer@patchew.org; Tue, 05 Dec 2017 01:06:27 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:33942) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eM6B9-0003yD-Gs for qemu-devel@nongnu.org; Tue, 05 Dec 2017 00:54:04 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eM6B8-00029S-9J for qemu-devel@nongnu.org; Tue, 05 Dec 2017 00:54:03 -0500 Received: from mx1.redhat.com ([209.132.183.28]:48834) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1eM6B8-00029E-2f for qemu-devel@nongnu.org; Tue, 05 Dec 2017 00:54:02 -0500 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 2523BC047B8B; Tue, 5 Dec 2017 05:54:01 +0000 (UTC) Received: from xz-mi.nay.redhat.com (dhcp-14-111.nay.redhat.com [10.66.14.111]) by smtp.corp.redhat.com (Postfix) with ESMTP id D7F4965E86; Tue, 5 Dec 2017 05:53:46 +0000 (UTC) From: Peter Xu To: qemu-devel@nongnu.org Date: Tue, 5 Dec 2017 13:51:48 +0800 Message-Id: <20171205055200.16305-15-peterx@redhat.com> In-Reply-To: <20171205055200.16305-1-peterx@redhat.com> References: <20171205055200.16305-1-peterx@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.31]); Tue, 05 Dec 2017 05:54:01 +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] [RFC v5 14/26] monitor: introduce monitor_qmp_respond() 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" A tiny refactoring, preparing to split the QMP dispatcher away. Reviewed-by: Fam Zheng Signed-off-by: Peter Xu --- monitor.c | 48 +++++++++++++++++++++++++++++++----------------- 1 file changed, 31 insertions(+), 17 deletions(-) diff --git a/monitor.c b/monitor.c index 9666115259..35d8925636 100644 --- a/monitor.c +++ b/monitor.c @@ -3877,6 +3877,36 @@ static int monitor_can_read(void *opaque) return (mon->suspend_cnt =3D=3D 0) ? 1 : 0; } =20 +/* + * When rsp/err/id is passed in, the function will be responsible for + * the cleanup. + */ +static void monitor_qmp_respond(Monitor *mon, QObject *rsp, + Error *err, QObject *id) +{ + QDict *qdict =3D NULL; + + if (err) { + qdict =3D qdict_new(); + qdict_put_obj(qdict, "error", qmp_build_error_object(err)); + error_free(err); + rsp =3D QOBJECT(qdict); + } + + if (rsp) { + if (id) { + /* This is for the qdict below. */ + qobject_incref(id); + qdict_put_obj(qobject_to_qdict(rsp), "id", id); + } + + monitor_json_emitter(mon, rsp); + } + + qobject_decref(id); + qobject_decref(rsp); +} + static void handle_qmp_command(JSONMessageParser *parser, GQueue *tokens, void *opaque) { @@ -3927,24 +3957,8 @@ static void handle_qmp_command(JSONMessageParser *pa= rser, GQueue *tokens, } =20 err_out: - if (err) { - qdict =3D qdict_new(); - qdict_put_obj(qdict, "error", qmp_build_error_object(err)); - error_free(err); - rsp =3D QOBJECT(qdict); - } + monitor_qmp_respond(mon, rsp, err, id); =20 - if (rsp) { - if (id) { - qdict_put_obj(qobject_to_qdict(rsp), "id", id); - id =3D NULL; - } - - monitor_json_emitter(mon, rsp); - } - - qobject_decref(id); - qobject_decref(rsp); qobject_decref(req); } =20 --=20 2.14.3 From nobody Tue Apr 30 15:39:40 2024 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 Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1512453552707668.9648737674713; Mon, 4 Dec 2017 21:59:12 -0800 (PST) Received: from localhost ([::1]:46622 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eM6G7-0001bL-4P for importer@patchew.org; Tue, 05 Dec 2017 00:59:11 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:33985) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eM6BD-000420-Mu for qemu-devel@nongnu.org; Tue, 05 Dec 2017 00:54:08 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eM6BC-0002B3-UE for qemu-devel@nongnu.org; Tue, 05 Dec 2017 00:54:07 -0500 Received: from mx1.redhat.com ([209.132.183.28]:57108) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1eM6BC-0002Af-OJ for qemu-devel@nongnu.org; Tue, 05 Dec 2017 00:54:06 -0500 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id CECA47F3F4; Tue, 5 Dec 2017 05:54:05 +0000 (UTC) Received: from xz-mi.nay.redhat.com (dhcp-14-111.nay.redhat.com [10.66.14.111]) by smtp.corp.redhat.com (Postfix) with ESMTP id 989FB5C54E; Tue, 5 Dec 2017 05:54:01 +0000 (UTC) From: Peter Xu To: qemu-devel@nongnu.org Date: Tue, 5 Dec 2017 13:51:49 +0800 Message-Id: <20171205055200.16305-16-peterx@redhat.com> In-Reply-To: <20171205055200.16305-1-peterx@redhat.com> References: <20171205055200.16305-1-peterx@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.25]); Tue, 05 Dec 2017 05:54:05 +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] [RFC v5 15/26] monitor: let suspend_cnt be thread safe 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" Monitor code now can be run in more than one thread. Let it be thread safe when accessing suspend_cnt counter. Signed-off-by: Peter Xu --- monitor.c | 13 +++++++------ 1 file changed, 7 insertions(+), 6 deletions(-) diff --git a/monitor.c b/monitor.c index 35d8925636..6ac1b2065d 100644 --- a/monitor.c +++ b/monitor.c @@ -3874,7 +3874,7 @@ static int monitor_can_read(void *opaque) { Monitor *mon =3D opaque; =20 - return (mon->suspend_cnt =3D=3D 0) ? 1 : 0; + return (atomic_read(&mon->suspend_cnt) =3D=3D 0) ? 1 : 0; } =20 /* @@ -4003,7 +4003,7 @@ int monitor_suspend(Monitor *mon) { if (!mon->rs) return -ENOTTY; - mon->suspend_cnt++; + atomic_inc(&mon->suspend_cnt); return 0; } =20 @@ -4011,8 +4011,9 @@ void monitor_resume(Monitor *mon) { if (!mon->rs) return; - if (--mon->suspend_cnt =3D=3D 0) + if (atomic_dec_fetch(&mon->suspend_cnt) =3D=3D 0) { readline_show_prompt(mon->rs); + } } =20 static QObject *get_qmp_greeting(void) @@ -4078,19 +4079,19 @@ static void monitor_event(void *opaque, int event) monitor_resume(mon); monitor_flush(mon); } else { - mon->suspend_cnt =3D 0; + atomic_set(&mon->suspend_cnt, 0); } break; =20 case CHR_EVENT_MUX_OUT: if (mon->reset_seen) { - if (mon->suspend_cnt =3D=3D 0) { + if (atomic_read(&mon->suspend_cnt) =3D=3D 0) { monitor_printf(mon, "\n"); } monitor_flush(mon); monitor_suspend(mon); } else { - mon->suspend_cnt++; + atomic_inc(&mon->suspend_cnt); } qemu_mutex_lock(&mon->out_lock); mon->mux_out =3D 1; --=20 2.14.3 From nobody Tue Apr 30 15:39:40 2024 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 Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 15124537318801011.926141680721; Mon, 4 Dec 2017 22:02:11 -0800 (PST) Received: from localhost ([::1]:46644 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eM6Iw-0003wW-25 for importer@patchew.org; Tue, 05 Dec 2017 01:02:06 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:34067) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eM6BM-0004AM-To for qemu-devel@nongnu.org; Tue, 05 Dec 2017 00:54:18 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eM6BK-0002DQ-8G for qemu-devel@nongnu.org; Tue, 05 Dec 2017 00:54:16 -0500 Received: from mx1.redhat.com ([209.132.183.28]:35662) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1eM6BJ-0002DB-VQ for qemu-devel@nongnu.org; Tue, 05 Dec 2017 00:54:14 -0500 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 12FEA85541; Tue, 5 Dec 2017 05:54:13 +0000 (UTC) Received: from xz-mi.nay.redhat.com (dhcp-14-111.nay.redhat.com [10.66.14.111]) by smtp.corp.redhat.com (Postfix) with ESMTP id 51A9B5C54E; Tue, 5 Dec 2017 05:54:06 +0000 (UTC) From: Peter Xu To: qemu-devel@nongnu.org Date: Tue, 5 Dec 2017 13:51:50 +0800 Message-Id: <20171205055200.16305-17-peterx@redhat.com> In-Reply-To: <20171205055200.16305-1-peterx@redhat.com> References: <20171205055200.16305-1-peterx@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.28]); Tue, 05 Dec 2017 05:54:13 +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] [RFC v5 16/26] monitor: separate QMP parser and dispatcher 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" Originally QMP goes throw these steps: JSON Parser --> QMP Dispatcher --> Respond /|\ (2) (3) | (1) | \|/ (4) +--------- main thread --------+ This patch does this: JSON Parser QMP Dispatcher --> Respond /|\ | /|\ (4) | | | (2) | (3) | (5) (1) | +-----> | \|/ +--------- main thread <-------+ So the parsing job and the dispatching job is isolated now. It gives us a chance in following up patches to totally move the parser outside. The isloation is done using one QEMUBH. Only one dispatcher QEMUBH is used for all the monitors. Signed-off-by: Peter Xu --- monitor.c | 179 ++++++++++++++++++++++++++++++++++++++++++++++++++++++----= ---- 1 file changed, 157 insertions(+), 22 deletions(-) diff --git a/monitor.c b/monitor.c index 6ac1b2065d..c20e659740 100644 --- a/monitor.c +++ b/monitor.c @@ -168,6 +168,10 @@ typedef struct { */ QmpCommandList *commands; bool qmp_caps[QMP_CAPABILITY__MAX]; + /* Protects qmp request/response queue. */ + QemuMutex qmp_queue_lock; + /* Input queue that holds all the parsed QMP requests */ + GQueue *qmp_requests; } MonitorQMP; =20 /* @@ -213,6 +217,8 @@ struct Monitor { =20 struct MonitorGlobal { IOThread *mon_iothread; + /* Bottom half to dispatch the requests received from IO thread */ + QEMUBH *qmp_dispatcher_bh; }; =20 static struct MonitorGlobal mon_global; @@ -582,11 +588,13 @@ static void monitor_data_init(Monitor *mon, bool skip= _flush, { memset(mon, 0, sizeof(Monitor)); qemu_mutex_init(&mon->out_lock); + qemu_mutex_init(&mon->qmp.qmp_queue_lock); mon->outbuf =3D qstring_new(); /* Use *mon_cmds by default. */ mon->cmd_table =3D mon_cmds; mon->skip_flush =3D skip_flush; mon->use_io_thr =3D use_io_thr; + mon->qmp.qmp_requests =3D g_queue_new(); } =20 static void monitor_data_destroy(Monitor *mon) @@ -599,6 +607,8 @@ static void monitor_data_destroy(Monitor *mon) g_free(mon->rs); QDECREF(mon->outbuf); qemu_mutex_destroy(&mon->out_lock); + qemu_mutex_destroy(&mon->qmp.qmp_queue_lock); + g_queue_free(mon->qmp.qmp_requests); } =20 char *qmp_human_monitor_command(const char *command_line, bool has_cpu_ind= ex, @@ -3907,29 +3917,31 @@ static void monitor_qmp_respond(Monitor *mon, QObje= ct *rsp, qobject_decref(rsp); } =20 -static void handle_qmp_command(JSONMessageParser *parser, GQueue *tokens, - void *opaque) +struct QMPRequest { + /* Owner of the request */ + Monitor *mon; + /* "id" field of the request */ + QObject *id; + /* Request object to be handled */ + QObject *req; +}; +typedef struct QMPRequest QMPRequest; + +/* + * Dispatch one single QMP request. The function will free the req_obj + * and objects inside it before return. + */ +static void monitor_qmp_dispatch_one(QMPRequest *req_obj) { - QObject *req, *rsp =3D NULL, *id =3D NULL; + Monitor *mon, *old_mon; + QObject *req, *rsp =3D NULL, *id; QDict *qdict =3D NULL; - Monitor *mon =3D opaque, *old_mon; - Error *err =3D NULL; =20 - req =3D json_parser_parse_err(tokens, NULL, &err); - if (!req && !err) { - /* json_parser_parse_err() sucks: can fail without setting @err */ - error_setg(&err, QERR_JSON_PARSING); - } - if (err) { - goto err_out; - } + req =3D req_obj->req; + mon =3D req_obj->mon; + id =3D req_obj->id; =20 - qdict =3D qobject_to_qdict(req); - if (qdict) { - id =3D qdict_get(qdict, "id"); - qobject_incref(id); - qdict_del(qdict, "id"); - } /* else will fail qmp_dispatch() */ + g_free(req_obj); =20 if (trace_event_get_state_backends(TRACE_HANDLE_QMP_COMMAND)) { QString *req_json =3D qobject_to_json(req); @@ -3940,7 +3952,7 @@ static void handle_qmp_command(JSONMessageParser *par= ser, GQueue *tokens, old_mon =3D cur_mon; cur_mon =3D mon; =20 - rsp =3D qmp_dispatch(cur_mon->qmp.commands, req); + rsp =3D qmp_dispatch(mon->qmp.commands, req); =20 cur_mon =3D old_mon; =20 @@ -3956,12 +3968,122 @@ static void handle_qmp_command(JSONMessageParser *= parser, GQueue *tokens, } } =20 -err_out: - monitor_qmp_respond(mon, rsp, err, id); + /* Respond if necessary */ + monitor_qmp_respond(mon, rsp, NULL, id); + + /* This pairs with the monitor_suspend() in handle_qmp_command(). */ + if (!qmp_oob_enabled(mon)) { + monitor_resume(mon); + } =20 qobject_decref(req); } =20 +/* + * Pop one QMP request from monitor queues, return NULL if not found. + * We are using round-robin fasion to pop the request, to avoid + * processing command only on a very busy monitor. To achieve that, + * when we processed one request on specific monitor, we put that + * monitor to the end of mon_list queue. + */ +static QMPRequest *monitor_qmp_requests_pop_one(void) +{ + QMPRequest *req_obj =3D NULL; + Monitor *mon; + + qemu_mutex_lock(&monitor_lock); + + QTAILQ_FOREACH(mon, &mon_list, entry) { + qemu_mutex_lock(&mon->qmp.qmp_queue_lock); + req_obj =3D g_queue_pop_head(mon->qmp.qmp_requests); + qemu_mutex_unlock(&mon->qmp.qmp_queue_lock); + if (req_obj) { + break; + } + } + + if (req_obj) { + /* + * We found one request on the monitor. Degrade this monitor's + * priority to lowest by re-inserting it to end of queue. + */ + QTAILQ_REMOVE(&mon_list, mon, entry); + QTAILQ_INSERT_TAIL(&mon_list, mon, entry); + } + + qemu_mutex_unlock(&monitor_lock); + + return req_obj; +} + +static void monitor_qmp_bh_dispatcher(void *data) +{ + QMPRequest *req_obj; + + while (true) { + req_obj =3D monitor_qmp_requests_pop_one(); + if (!req_obj) { + break; + } + monitor_qmp_dispatch_one(req_obj); + } +} + +static void handle_qmp_command(JSONMessageParser *parser, GQueue *tokens, + void *opaque) +{ + QObject *req, *id =3D NULL; + QDict *qdict =3D NULL; + Monitor *mon =3D opaque; + Error *err =3D NULL; + QMPRequest *req_obj; + + req =3D json_parser_parse_err(tokens, NULL, &err); + if (!req && !err) { + /* json_parser_parse_err() sucks: can fail without setting @err */ + error_setg(&err, QERR_JSON_PARSING); + } + if (err) { + monitor_qmp_respond(mon, NULL, err, NULL); + qobject_decref(req); + return; + } + + qdict =3D qobject_to_qdict(req); + if (qdict) { + id =3D qdict_get(qdict, "id"); + qobject_incref(id); + qdict_del(qdict, "id"); + } /* else will fail qmp_dispatch() */ + + req_obj =3D g_new0(QMPRequest, 1); + req_obj->mon =3D mon; + req_obj->id =3D id; + req_obj->req =3D req; + + /* + * Put the request to the end of queue so that requests will be + * handled in time order. Ownership for req_obj, req, id, + * etc. will be delivered to the handler side. + */ + qemu_mutex_lock(&mon->qmp.qmp_queue_lock); + g_queue_push_tail(mon->qmp.qmp_requests, req_obj); + qemu_mutex_unlock(&mon->qmp.qmp_queue_lock); + + /* Kick the dispatcher routine */ + qemu_bh_schedule(mon_global.qmp_dispatcher_bh); + + /* + * If OOB is not enabled on current monitor, we'll emulate the old + * behavior that we won't process current monitor any more until + * it is responded. This helps make sure that as long as OOB is + * not enabled, the server will never drop any command. + */ + if (!qmp_oob_enabled(mon)) { + monitor_suspend(mon); + } +} + static void monitor_qmp_read(void *opaque, const uint8_t *buf, int size) { Monitor *mon =3D opaque; @@ -4144,6 +4266,15 @@ static void monitor_iothread_init(void) { mon_global.mon_iothread =3D iothread_create("mon_iothread", &error_abort); + + /* + * This MUST be on main loop thread since we have commands that + * have assumption to be run on main loop thread (Yeah, we'd + * better remove this assumption in the future). + */ + mon_global.qmp_dispatcher_bh =3D aio_bh_new(qemu_get_aio_context(), + monitor_qmp_bh_dispatcher, + NULL); } =20 void monitor_init_globals(void) @@ -4267,6 +4398,10 @@ void monitor_cleanup(void) } qemu_mutex_unlock(&monitor_lock); =20 + /* QEMUBHs needs to be deleted before destroying the IOThread. */ + qemu_bh_delete(mon_global.qmp_dispatcher_bh); + mon_global.qmp_dispatcher_bh =3D NULL; + iothread_destroy(mon_global.mon_iothread); mon_global.mon_iothread =3D NULL; } --=20 2.14.3 From nobody Tue Apr 30 15:39:40 2024 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 Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1512454045427497.317515681072; Mon, 4 Dec 2017 22:07:25 -0800 (PST) Received: from localhost ([::1]:46674 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eM6O2-0000LB-JA for importer@patchew.org; Tue, 05 Dec 2017 01:07:22 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:34113) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eM6BY-0004LF-EZ for qemu-devel@nongnu.org; Tue, 05 Dec 2017 00:54:29 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eM6BX-0002Gb-Jo for qemu-devel@nongnu.org; Tue, 05 Dec 2017 00:54:28 -0500 Received: from mx1.redhat.com ([209.132.183.28]:33814) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1eM6BX-0002GS-D6 for qemu-devel@nongnu.org; Tue, 05 Dec 2017 00:54:27 -0500 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 7610A356E4; Tue, 5 Dec 2017 05:54:26 +0000 (UTC) Received: from xz-mi.nay.redhat.com (dhcp-14-111.nay.redhat.com [10.66.14.111]) by smtp.corp.redhat.com (Postfix) with ESMTP id 8A9AC4D5; Tue, 5 Dec 2017 05:54:13 +0000 (UTC) From: Peter Xu To: qemu-devel@nongnu.org Date: Tue, 5 Dec 2017 13:51:51 +0800 Message-Id: <20171205055200.16305-18-peterx@redhat.com> In-Reply-To: <20171205055200.16305-1-peterx@redhat.com> References: <20171205055200.16305-1-peterx@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.30]); Tue, 05 Dec 2017 05:54:26 +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] [RFC v5 17/26] qmp: add new event "request-dropped" 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 event will be emitted if one QMP request is dropped. Along, declare an enum for the reasons. Signed-off-by: Peter Xu --- qapi-schema.json | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) diff --git a/qapi-schema.json b/qapi-schema.json index 531fd4c0db..9d2625b6b3 100644 --- a/qapi-schema.json +++ b/qapi-schema.json @@ -3222,3 +3222,37 @@ # Since: 2.11 ## { 'command': 'watchdog-set-action', 'data' : {'action': 'WatchdogAction'} } + +## +# @RequestDropReason: +# +# Reasons that caused one command to be dropped. +# +# @queue-full: the queue of request is full. +# +# Since: 2.12 +## +{ 'enum': 'RequestDropReason', + 'data': [ 'queue-full' ] } + +## +# @REQUEST_DROPPED: +# +# Emitted when one QMP request is dropped due to some reason. +# REQUEST_DROPPED is only emitted when the oob capability is enabled. +# +# @id: The dropped command's "id" field. +# +# @reason: The reason why the request is dropped. +# +# Since: 2.12 +# +# Example: +# +# { "event": "REQUEST_DROPPED", +# "data": {"result": {"id": "libvirt-102", +# "reason": "queue-full" } } } +# +## +{ 'event': 'REQUEST_DROPPED' , + 'data': { 'id': 'any', 'reason': 'RequestDropReason' } } --=20 2.14.3 From nobody Tue Apr 30 15:39:40 2024 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 Return-Path: Received: from lists.gnu.org (208.118.235.17 [208.118.235.17]) by mx.zohomail.com with SMTPS id 1512453914051857.0969321010105; Mon, 4 Dec 2017 22:05:14 -0800 (PST) Received: from localhost ([::1]:46661 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eM6Lx-0006u7-8L for importer@patchew.org; Tue, 05 Dec 2017 01:05:13 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:34167) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eM6Bh-0004U2-8a for qemu-devel@nongnu.org; Tue, 05 Dec 2017 00:54:38 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eM6Be-0002KM-Om for qemu-devel@nongnu.org; Tue, 05 Dec 2017 00:54:37 -0500 Received: from mx1.redhat.com ([209.132.183.28]:33902) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1eM6Be-0002Jm-Ik for qemu-devel@nongnu.org; Tue, 05 Dec 2017 00:54:34 -0500 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id AA77612B24; Tue, 5 Dec 2017 05:54:33 +0000 (UTC) Received: from xz-mi.nay.redhat.com (dhcp-14-111.nay.redhat.com [10.66.14.111]) by smtp.corp.redhat.com (Postfix) with ESMTP id E88FA516ED; Tue, 5 Dec 2017 05:54:26 +0000 (UTC) From: Peter Xu To: qemu-devel@nongnu.org Date: Tue, 5 Dec 2017 13:51:52 +0800 Message-Id: <20171205055200.16305-19-peterx@redhat.com> In-Reply-To: <20171205055200.16305-1-peterx@redhat.com> References: <20171205055200.16305-1-peterx@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.30]); Tue, 05 Dec 2017 05:54:33 +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] [RFC v5 18/26] monitor: send event when request queue full 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" Set maximum QMP request queue length to 8. If queue full, instead of queue the command, we directly return a "request-dropped" event, telling client that specific command is dropped. Note that this flow control mechanism is only valid if OOB is enabled. If it's not, the effective queue length will always be 1, which strictly follows original behavior of QMP command handling (which never drop messages). Signed-off-by: Peter Xu --- monitor.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/monitor.c b/monitor.c index c20e659740..f7923c4590 100644 --- a/monitor.c +++ b/monitor.c @@ -4029,6 +4029,8 @@ static void monitor_qmp_bh_dispatcher(void *data) } } =20 +#define QMP_REQ_QUEUE_LEN_MAX (8) + static void handle_qmp_command(JSONMessageParser *parser, GQueue *tokens, void *opaque) { @@ -4061,6 +4063,19 @@ static void handle_qmp_command(JSONMessageParser *pa= rser, GQueue *tokens, req_obj->id =3D id; req_obj->req =3D req; =20 + if (qmp_oob_enabled(mon)) { + /* Drop the request if queue is full. */ + if (mon->qmp.qmp_requests->length >=3D QMP_REQ_QUEUE_LEN_MAX) { + qapi_event_send_request_dropped(id, + REQUEST_DROP_REASON_QUEUE_FULL, + NULL); + qobject_decref(id); + qobject_decref(req); + g_free(req_obj); + return; + } + } + /* * Put the request to the end of queue so that requests will be * handled in time order. Ownership for req_obj, req, id, --=20 2.14.3 From nobody Tue Apr 30 15:39:40 2024 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 Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1512454169461601.3138766262947; Mon, 4 Dec 2017 22:09:29 -0800 (PST) Received: from localhost ([::1]:46686 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eM6Q1-0002Xg-C9 for importer@patchew.org; Tue, 05 Dec 2017 01:09:25 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:34253) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eM6Bq-0004cl-Mg for qemu-devel@nongnu.org; Tue, 05 Dec 2017 00:54:48 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eM6Bo-0002OS-36 for qemu-devel@nongnu.org; Tue, 05 Dec 2017 00:54:46 -0500 Received: from mx1.redhat.com ([209.132.183.28]:33004) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1eM6Bn-0002O6-QE for qemu-devel@nongnu.org; Tue, 05 Dec 2017 00:54:44 -0500 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id E75EE4ACBC; Tue, 5 Dec 2017 05:54:42 +0000 (UTC) Received: from xz-mi.nay.redhat.com (dhcp-14-111.nay.redhat.com [10.66.14.111]) by smtp.corp.redhat.com (Postfix) with ESMTP id 2B550171F7; Tue, 5 Dec 2017 05:54:33 +0000 (UTC) From: Peter Xu To: qemu-devel@nongnu.org Date: Tue, 5 Dec 2017 13:51:53 +0800 Message-Id: <20171205055200.16305-20-peterx@redhat.com> In-Reply-To: <20171205055200.16305-1-peterx@redhat.com> References: <20171205055200.16305-1-peterx@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.38]); Tue, 05 Dec 2017 05:54:42 +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] [RFC v5 19/26] qapi: introduce new cmd option "allow-oob" 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" Here "oob" stands for "Out-Of-Band". When "allow-oob" is set, it means the command allows out-of-band execution. The "oob" idea is proposed by Markus Armbruster in following thread: https://lists.gnu.org/archive/html/qemu-devel/2017-09/msg02057.html This new "allow-oob" boolean will be exposed by "query-qmp-schema" as well for command entries, so that QMP clients can know which command can be used as out-of-band calls. For example the command "migrate" originally looks like: {"name": "migrate", "ret-type": "17", "meta-type": "command", "arg-type": "86"} And it'll be changed into: {"name": "migrate", "ret-type": "17", "allow-oob": false, "meta-type": "command", "arg-type": "86"} This patch only provides the QMP interface level changes. It does not contains the real out-of-band execution implementation yet. Suggested-by: Markus Armbruster Signed-off-by: Peter Xu Reviewed-by: Stefan Hajnoczi --- include/qapi/qmp/dispatch.h | 1 + qapi/introspect.json | 6 +++++- scripts/qapi-commands.py | 19 ++++++++++++++----- scripts/qapi-introspect.py | 10 ++++++++-- scripts/qapi.py | 15 ++++++++++----- scripts/qapi2texi.py | 2 +- tests/qapi-schema/test-qapi.py | 2 +- 7 files changed, 40 insertions(+), 15 deletions(-) diff --git a/include/qapi/qmp/dispatch.h b/include/qapi/qmp/dispatch.h index 20578dcd48..b76798800c 100644 --- a/include/qapi/qmp/dispatch.h +++ b/include/qapi/qmp/dispatch.h @@ -23,6 +23,7 @@ typedef enum QmpCommandOptions { QCO_NO_OPTIONS =3D 0x0, QCO_NO_SUCCESS_RESP =3D 0x1, + QCO_ALLOW_OOB =3D 0x2, } QmpCommandOptions; =20 typedef struct QmpCommand diff --git a/qapi/introspect.json b/qapi/introspect.json index 5b3e6e9d78..57cc137627 100644 --- a/qapi/introspect.json +++ b/qapi/introspect.json @@ -259,12 +259,16 @@ # # @ret-type: the name of the command's result type. # +# @allow-oob: whether the command allows out-of-band execution. +# (Since: 2.11) +# # TODO: @success-response (currently irrelevant, because it's QGA, not QMP) # # Since: 2.5 ## { 'struct': 'SchemaInfoCommand', - 'data': { 'arg-type': 'str', 'ret-type': 'str' } } + 'data': { 'arg-type': 'str', 'ret-type': 'str', + 'allow-oob': 'bool' } } =20 ## # @SchemaInfoEvent: diff --git a/scripts/qapi-commands.py b/scripts/qapi-commands.py index 974d0a4a80..b2b0bc0510 100644 --- a/scripts/qapi-commands.py +++ b/scripts/qapi-commands.py @@ -192,10 +192,18 @@ out: return ret =20 =20 -def gen_register_command(name, success_response): - options =3D 'QCO_NO_OPTIONS' +def gen_register_command(name, success_response, allow_oob): + options =3D [] + if not success_response: - options =3D 'QCO_NO_SUCCESS_RESP' + options +=3D ['QCO_NO_SUCCESS_RESP'] + if allow_oob: + options +=3D ['QCO_ALLOW_OOB'] + + if not options: + options =3D ['QCO_NO_OPTIONS'] + + options =3D " | ".join(options) =20 ret =3D mcgen(''' qmp_register_command(cmds, "%(name)s", @@ -241,7 +249,7 @@ class QAPISchemaGenCommandVisitor(QAPISchemaVisitor): self._visited_ret_types =3D None =20 def visit_command(self, name, info, arg_type, ret_type, - gen, success_response, boxed): + gen, success_response, boxed, allow_oob): if not gen: return self.decl +=3D gen_command_decl(name, arg_type, boxed, ret_type) @@ -250,7 +258,8 @@ class QAPISchemaGenCommandVisitor(QAPISchemaVisitor): self.defn +=3D gen_marshal_output(ret_type) self.decl +=3D gen_marshal_decl(name) self.defn +=3D gen_marshal(name, arg_type, boxed, ret_type) - self._regy +=3D gen_register_command(name, success_response) + self._regy +=3D gen_register_command(name, success_response, + allow_oob) =20 =20 (input_file, output_dir, do_c, do_h, prefix, opts) =3D parse_command_line() diff --git a/scripts/qapi-introspect.py b/scripts/qapi-introspect.py index 032bcea491..9fbf88b644 100644 --- a/scripts/qapi-introspect.py +++ b/scripts/qapi-introspect.py @@ -28,6 +28,11 @@ def to_json(obj, level=3D0): to_json(obj[key], level + 1)) for key in sorted(obj.keys())] ret =3D '{' + ', '.join(elts) + '}' + elif isinstance(obj, bool): + if obj: + ret =3D 'true' + else: + ret =3D 'false' else: assert False # not implemented if level =3D=3D 1: @@ -154,12 +159,13 @@ const char %(c_name)s[] =3D %(c_string)s; for m in variants.variants]}) =20 def visit_command(self, name, info, arg_type, ret_type, - gen, success_response, boxed): + gen, success_response, boxed, allow_oob): arg_type =3D arg_type or self._schema.the_empty_object_type ret_type =3D ret_type or self._schema.the_empty_object_type self._gen_json(name, 'command', {'arg-type': self._use_type(arg_type), - 'ret-type': self._use_type(ret_type)}) + 'ret-type': self._use_type(ret_type), + 'allow-oob': allow_oob}) =20 def visit_event(self, name, info, arg_type, boxed): arg_type =3D arg_type or self._schema.the_empty_object_type diff --git a/scripts/qapi.py b/scripts/qapi.py index 62dc52ed6e..f411b8fc91 100644 --- a/scripts/qapi.py +++ b/scripts/qapi.py @@ -920,7 +920,8 @@ def check_exprs(exprs): elif 'command' in expr: meta =3D 'command' check_keys(expr_elem, 'command', [], - ['data', 'returns', 'gen', 'success-response', 'box= ed']) + ['data', 'returns', 'gen', 'success-response', + 'boxed', 'allow-oob']) elif 'event' in expr: meta =3D 'event' check_keys(expr_elem, 'event', [], ['data', 'boxed']) @@ -1031,7 +1032,7 @@ class QAPISchemaVisitor(object): pass =20 def visit_command(self, name, info, arg_type, ret_type, - gen, success_response, boxed): + gen, success_response, boxed, allow_oob): pass =20 def visit_event(self, name, info, arg_type, boxed): @@ -1398,7 +1399,7 @@ class QAPISchemaAlternateType(QAPISchemaType): =20 class QAPISchemaCommand(QAPISchemaEntity): def __init__(self, name, info, doc, arg_type, ret_type, - gen, success_response, boxed): + gen, success_response, boxed, allow_oob): QAPISchemaEntity.__init__(self, name, info, doc) assert not arg_type or isinstance(arg_type, str) assert not ret_type or isinstance(ret_type, str) @@ -1409,6 +1410,7 @@ class QAPISchemaCommand(QAPISchemaEntity): self.gen =3D gen self.success_response =3D success_response self.boxed =3D boxed + self.allow_oob =3D allow_oob =20 def check(self, schema): if self._arg_type_name: @@ -1432,7 +1434,8 @@ class QAPISchemaCommand(QAPISchemaEntity): def visit(self, visitor): visitor.visit_command(self.name, self.info, self.arg_type, self.ret_type, - self.gen, self.success_response, self.boxed) + self.gen, self.success_response, + self.boxed, self.allow_oob) =20 =20 class QAPISchemaEvent(QAPISchemaEntity): @@ -1640,6 +1643,7 @@ class QAPISchema(object): gen =3D expr.get('gen', True) success_response =3D expr.get('success-response', True) boxed =3D expr.get('boxed', False) + allow_oob =3D expr.get('allow-oob', False) if isinstance(data, OrderedDict): data =3D self._make_implicit_object_type( name, info, doc, 'arg', self._make_members(data, info)) @@ -1647,7 +1651,8 @@ class QAPISchema(object): assert len(rets) =3D=3D 1 rets =3D self._make_array_type(rets[0], info) self._def_entity(QAPISchemaCommand(name, info, doc, data, rets, - gen, success_response, boxed)) + gen, success_response, + boxed, allow_oob)) =20 def _def_event(self, expr, info, doc): name =3D expr['event'] diff --git a/scripts/qapi2texi.py b/scripts/qapi2texi.py index a317526e51..0ac0df517a 100755 --- a/scripts/qapi2texi.py +++ b/scripts/qapi2texi.py @@ -236,7 +236,7 @@ class QAPISchemaGenDocVisitor(qapi.QAPISchemaVisitor): body=3Dtexi_entity(doc, 'Members')) =20 def visit_command(self, name, info, arg_type, ret_type, - gen, success_response, boxed): + gen, success_response, boxed, allow_oob): doc =3D self.cur_doc if self.out: self.out +=3D '\n' diff --git a/tests/qapi-schema/test-qapi.py b/tests/qapi-schema/test-qapi.py index c7724d3437..6749e9e397 100644 --- a/tests/qapi-schema/test-qapi.py +++ b/tests/qapi-schema/test-qapi.py @@ -36,7 +36,7 @@ class QAPISchemaTestVisitor(QAPISchemaVisitor): self._print_variants(variants) =20 def visit_command(self, name, info, arg_type, ret_type, - gen, success_response, boxed): + gen, success_response, boxed, allow_oob): print 'command %s %s -> %s' % \ (name, arg_type and arg_type.name, ret_type and ret_type.name) print ' gen=3D%s success_response=3D%s boxed=3D%s' % \ --=20 2.14.3 From nobody Tue Apr 30 15:39:40 2024 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 Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1512454081853675.0871310125971; Mon, 4 Dec 2017 22:08:01 -0800 (PST) Received: from localhost ([::1]:46679 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eM6OZ-0000pz-RB for importer@patchew.org; Tue, 05 Dec 2017 01:07:55 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:34271) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eM6Bu-0004gZ-7b for qemu-devel@nongnu.org; Tue, 05 Dec 2017 00:54:51 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eM6Bs-0002SU-UE for qemu-devel@nongnu.org; Tue, 05 Dec 2017 00:54:50 -0500 Received: from mx1.redhat.com ([209.132.183.28]:55832) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1eM6Bs-0002SE-LV for qemu-devel@nongnu.org; Tue, 05 Dec 2017 00:54:48 -0500 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id B1E4261475; Tue, 5 Dec 2017 05:54:47 +0000 (UTC) Received: from xz-mi.nay.redhat.com (dhcp-14-111.nay.redhat.com [10.66.14.111]) by smtp.corp.redhat.com (Postfix) with ESMTP id 69A795C54E; Tue, 5 Dec 2017 05:54:43 +0000 (UTC) From: Peter Xu To: qemu-devel@nongnu.org Date: Tue, 5 Dec 2017 13:51:54 +0800 Message-Id: <20171205055200.16305-21-peterx@redhat.com> In-Reply-To: <20171205055200.16305-1-peterx@redhat.com> References: <20171205055200.16305-1-peterx@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.39]); Tue, 05 Dec 2017 05:54:47 +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] [RFC v5 20/26] qmp: support out-of-band (oob) execution 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" Having "allow-oob" to true for a command does not mean that this command will always be run in out-of-band mode. The out-of-band quick path will only be executed if we specify the extra "run-oob" flag when sending the QMP request: { "execute": "command-that-allows-oob", "arguments": { ... }, "control": { "run-oob": true } } The "control" key is introduced to store this extra flag. "control" field is used to store arguments that are shared by all the commands, rather than command specific arguments. Let "run-oob" be the first. Signed-off-by: Peter Xu --- include/qapi/qmp/dispatch.h | 1 + monitor.c | 24 ++++++++++++++++++++++++ qapi/qmp-dispatch.c | 39 +++++++++++++++++++++++++++++++++++++++ trace-events | 2 ++ 4 files changed, 66 insertions(+) diff --git a/include/qapi/qmp/dispatch.h b/include/qapi/qmp/dispatch.h index b76798800c..ee2b8ce576 100644 --- a/include/qapi/qmp/dispatch.h +++ b/include/qapi/qmp/dispatch.h @@ -49,6 +49,7 @@ bool qmp_command_is_enabled(const QmpCommand *cmd); const char *qmp_command_name(const QmpCommand *cmd); bool qmp_has_success_response(const QmpCommand *cmd); QObject *qmp_build_error_object(Error *err); +bool qmp_is_oob(const QObject *request); =20 typedef void (*qmp_cmd_callback_fn)(QmpCommand *cmd, void *opaque); =20 diff --git a/monitor.c b/monitor.c index f7923c4590..aa3049bbca 100644 --- a/monitor.c +++ b/monitor.c @@ -4025,6 +4025,7 @@ static void monitor_qmp_bh_dispatcher(void *data) if (!req_obj) { break; } + trace_monitor_qmp_cmd_in_band(qobject_get_try_str(req_obj->id)); monitor_qmp_dispatch_one(req_obj); } } @@ -4051,9 +4052,25 @@ static void handle_qmp_command(JSONMessageParser *pa= rser, GQueue *tokens, return; } =20 + if (!qmp_oob_enabled(mon) && qmp_is_oob(req)) { + error_setg(&err, "Out-Of-Band is only allowed " + "when OOB is enabled."); + monitor_qmp_respond(mon, NULL, err, NULL); + qobject_decref(req); + return; + } + qdict =3D qobject_to_qdict(req); if (qdict) { id =3D qdict_get(qdict, "id"); + /* When OOB is enabled, the "id" field is mandatory. */ + if (qmp_oob_enabled(mon) && !id) { + error_setg(&err, "Out-Of-Band capability requires that " + "every command contains an 'id' field."); + monitor_qmp_respond(mon, NULL, err, NULL); + qobject_decref(req); + return; + } qobject_incref(id); qdict_del(qdict, "id"); } /* else will fail qmp_dispatch() */ @@ -4064,6 +4081,13 @@ static void handle_qmp_command(JSONMessageParser *pa= rser, GQueue *tokens, req_obj->req =3D req; =20 if (qmp_oob_enabled(mon)) { + if (qmp_is_oob(req)) { + /* Out-Of-Band (OOB) requests are executed directly in parser.= */ + trace_monitor_qmp_cmd_out_of_band(qobject_get_try_str(req_obj-= >id)); + monitor_qmp_dispatch_one(req_obj); + return; + } + /* Drop the request if queue is full. */ if (mon->qmp.qmp_requests->length >=3D QMP_REQ_QUEUE_LEN_MAX) { qapi_event_send_request_dropped(id, diff --git a/qapi/qmp-dispatch.c b/qapi/qmp-dispatch.c index b41fa174fe..ed7e5d5a75 100644 --- a/qapi/qmp-dispatch.c +++ b/qapi/qmp-dispatch.c @@ -52,6 +52,12 @@ static QDict *qmp_dispatch_check_obj(const QObject *requ= est, Error **errp) "QMP input member 'arguments' must be an object= "); return NULL; } + } else if (!strcmp(arg_name, "control")) { + if (qobject_type(arg_obj) !=3D QTYPE_QDICT) { + error_setg(errp, + "QMP input member 'control' must be a dict"); + return NULL; + } } else { error_setg(errp, "QMP input member '%s' is unexpected", arg_name); @@ -94,6 +100,11 @@ static QObject *do_qmp_dispatch(QmpCommandList *cmds, Q= Object *request, return NULL; } =20 + if (qmp_is_oob(request) && !(cmd->options & QCO_ALLOW_OOB)) { + error_setg(errp, "The command %s does not support OOB", command); + return NULL; + } + if (!qdict_haskey(dict, "arguments")) { args =3D qdict_new(); } else { @@ -122,6 +133,34 @@ QObject *qmp_build_error_object(Error *err) error_get_pretty(err)); } =20 +/* + * Detect whether a request should be run out-of-band, by quickly + * peeking at whether we have: { "control": { "run-oob": True } }. By + * default commands are run in-band. + */ +bool qmp_is_oob(const QObject *request) +{ + QDict *dict; + QBool *bool_obj; + + dict =3D qobject_to_qdict(request); + if (!dict) { + return false; + } + + dict =3D qdict_get_qdict(dict, "control"); + if (!dict) { + return false; + } + + bool_obj =3D qobject_to_qbool(qdict_get(dict, "run-oob")); + if (!bool_obj) { + return false; + } + + return qbool_get_bool(bool_obj); +} + QObject *qmp_dispatch(QmpCommandList *cmds, QObject *request) { Error *err =3D NULL; diff --git a/trace-events b/trace-events index 1d2eb5d3e4..3148e590c9 100644 --- a/trace-events +++ b/trace-events @@ -47,6 +47,8 @@ monitor_protocol_event_emit(uint32_t event, void *data) "= event=3D%d data=3D%p" monitor_protocol_event_queue(uint32_t event, void *qdict, uint64_t rate) "= event=3D%d data=3D%p rate=3D%" PRId64 handle_hmp_command(void *mon, const char *cmdline) "mon %p cmdline: %s" handle_qmp_command(void *mon, const char *req) "mon %p req: %s" +monitor_qmp_cmd_in_band(const char *id) "%s" +monitor_qmp_cmd_out_of_band(const char *id) "%s" =20 # dma-helpers.c dma_blk_io(void *dbs, void *bs, int64_t offset, bool to_dev) "dbs=3D%p bs= =3D%p offset=3D%" PRId64 " to_dev=3D%d" --=20 2.14.3 From nobody Tue Apr 30 15:39:40 2024 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 Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1512454135405852.8189872039904; Mon, 4 Dec 2017 22:08:55 -0800 (PST) Received: from localhost ([::1]:46682 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eM6PS-0001mO-TP for importer@patchew.org; Tue, 05 Dec 2017 01:08:50 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:34306) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eM6C2-0004o1-2E for qemu-devel@nongnu.org; Tue, 05 Dec 2017 00:54:59 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eM6Bz-0002Tp-G0 for qemu-devel@nongnu.org; Tue, 05 Dec 2017 00:54:58 -0500 Received: from mx1.redhat.com ([209.132.183.28]:34004) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1eM6Bz-0002Te-7X for qemu-devel@nongnu.org; Tue, 05 Dec 2017 00:54:55 -0500 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 58D0FDF02; Tue, 5 Dec 2017 05:54:54 +0000 (UTC) Received: from xz-mi.nay.redhat.com (dhcp-14-111.nay.redhat.com [10.66.14.111]) by smtp.corp.redhat.com (Postfix) with ESMTP id 3FA1D66851; Tue, 5 Dec 2017 05:54:47 +0000 (UTC) From: Peter Xu To: qemu-devel@nongnu.org Date: Tue, 5 Dec 2017 13:51:55 +0800 Message-Id: <20171205055200.16305-22-peterx@redhat.com> In-Reply-To: <20171205055200.16305-1-peterx@redhat.com> References: <20171205055200.16305-1-peterx@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.30]); Tue, 05 Dec 2017 05:54:54 +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] [RFC v5 21/26] qmp: isolate responses into io thread 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" For those monitors who has enabled IO thread, we'll offload the responding procedure into IO thread. The main reason is that chardev is not thread safe, and we need to do all the read/write IOs in the same thread. For use_io_thr=3Dtrue monitors, that thread is the IO thread. We do this isolation in similar pattern as what we have done to the request queue: we first create one response queue for each monitor, then instead of reply directly in main thread, we queue the responses and kick the IO thread to do the rest of the job for us. A funny thing after doing this is that, when the QMP clients send "quit" to QEMU, it's possible that we close the IOThread even earlier than replying to that "quit". So another thing we need to do before cleaning up the monitors is that we need to flush the response queue (we don't need to do that for command queue; after all we are quitting) to make sure replies for handled commands are always flushed back to clients. Signed-off-by: Peter Xu --- monitor.c | 97 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++= +++- 1 file changed, 96 insertions(+), 1 deletion(-) diff --git a/monitor.c b/monitor.c index aa3049bbca..298703d90f 100644 --- a/monitor.c +++ b/monitor.c @@ -172,6 +172,8 @@ typedef struct { QemuMutex qmp_queue_lock; /* Input queue that holds all the parsed QMP requests */ GQueue *qmp_requests; + /* Output queue contains all the QMP responses in order */ + GQueue *qmp_responses; } MonitorQMP; =20 /* @@ -219,6 +221,8 @@ struct MonitorGlobal { IOThread *mon_iothread; /* Bottom half to dispatch the requests received from IO thread */ QEMUBH *qmp_dispatcher_bh; + /* Bottom half to deliver the responses back to clients */ + QEMUBH *qmp_respond_bh; }; =20 static struct MonitorGlobal mon_global; @@ -395,7 +399,8 @@ int monitor_fprintf(FILE *stream, const char *fmt, ...) return 0; } =20 -static void monitor_json_emitter(Monitor *mon, const QObject *data) +static void monitor_json_emitter_raw(Monitor *mon, + QObject *data) { QString *json; =20 @@ -409,6 +414,71 @@ static void monitor_json_emitter(Monitor *mon, const Q= Object *data) QDECREF(json); } =20 +static void monitor_json_emitter(Monitor *mon, QObject *data) +{ + if (mon->use_io_thr) { + /* + * If using IO thread, we need to queue the item so that IO + * thread will do the rest for us. Take refcount so that + * caller won't free the data (which will be finally freed in + * responder thread). + */ + qobject_incref(data); + qemu_mutex_lock(&mon->qmp.qmp_queue_lock); + g_queue_push_tail(mon->qmp.qmp_responses, (void *)data); + qemu_mutex_unlock(&mon->qmp.qmp_queue_lock); + qemu_bh_schedule(mon_global.qmp_respond_bh); + } else { + /* + * If not using monitor IO thread, then we are in main thread. + * Do the emission right away. + */ + monitor_json_emitter_raw(mon, data); + } +} + +struct QMPResponse { + Monitor *mon; + QObject *data; +}; +typedef struct QMPResponse QMPResponse; + +/* + * Return one QMPResponse. The response is only valid if + * response.data is not NULL. + */ +static QMPResponse monitor_qmp_response_pop_one(void) +{ + Monitor *mon; + QObject *data =3D NULL; + + qemu_mutex_lock(&monitor_lock); + QTAILQ_FOREACH(mon, &mon_list, entry) { + qemu_mutex_lock(&mon->qmp.qmp_queue_lock); + data =3D g_queue_pop_head(mon->qmp.qmp_responses); + qemu_mutex_unlock(&mon->qmp.qmp_queue_lock); + if (data) { + break; + } + } + qemu_mutex_unlock(&monitor_lock); + return (QMPResponse) { .mon =3D mon, .data =3D data }; +} + +static void monitor_qmp_bh_responder(void *opaque) +{ + QMPResponse response; + + while (true) { + response =3D monitor_qmp_response_pop_one(); + if (!response.data) { + break; + } + monitor_json_emitter_raw(response.mon, response.data); + qobject_decref(response.data); + } +} + static MonitorQAPIEventConf monitor_qapi_event_conf[QAPI_EVENT__MAX] =3D { /* Limit guest-triggerable events to 1 per second */ [QAPI_EVENT_RTC_CHANGE] =3D { 1000 * SCALE_MS }, @@ -595,6 +665,7 @@ static void monitor_data_init(Monitor *mon, bool skip_f= lush, mon->skip_flush =3D skip_flush; mon->use_io_thr =3D use_io_thr; mon->qmp.qmp_requests =3D g_queue_new(); + mon->qmp.qmp_responses =3D g_queue_new(); } =20 static void monitor_data_destroy(Monitor *mon) @@ -609,6 +680,7 @@ static void monitor_data_destroy(Monitor *mon) qemu_mutex_destroy(&mon->out_lock); qemu_mutex_destroy(&mon->qmp.qmp_queue_lock); g_queue_free(mon->qmp.qmp_requests); + g_queue_free(mon->qmp.qmp_responses); } =20 char *qmp_human_monitor_command(const char *command_line, bool has_cpu_ind= ex, @@ -4301,6 +4373,11 @@ static GMainContext *monitor_io_context_get(void) return iothread_get_g_main_context(mon_global.mon_iothread); } =20 +static AioContext *monitor_aio_context_get(void) +{ + return iothread_get_aio_context(mon_global.mon_iothread); +} + static void monitor_iothread_init(void) { mon_global.mon_iothread =3D iothread_create("mon_iothread", @@ -4314,6 +4391,15 @@ static void monitor_iothread_init(void) mon_global.qmp_dispatcher_bh =3D aio_bh_new(qemu_get_aio_context(), monitor_qmp_bh_dispatcher, NULL); + + /* + * Unlike the dispatcher BH, this must be run on the monitor IO + * thread, so that monitors that are using IO thread will make + * sure read/write operations are all done on the IO thread. + */ + mon_global.qmp_respond_bh =3D aio_bh_new(monitor_aio_context_get(), + monitor_qmp_bh_responder, + NULL); } =20 void monitor_init_globals(void) @@ -4429,6 +4515,13 @@ void monitor_cleanup(void) */ iothread_stop(mon_global.mon_iothread); =20 + /* + * After we have IOThread to send responses, it's possible that + * when we stop the IOThread there are still replies queued in the + * responder queue. Flush all of them. + */ + monitor_qmp_bh_responder(NULL); + qemu_mutex_lock(&monitor_lock); QTAILQ_FOREACH_SAFE(mon, &mon_list, entry, next) { QTAILQ_REMOVE(&mon_list, mon, entry); @@ -4440,6 +4533,8 @@ void monitor_cleanup(void) /* QEMUBHs needs to be deleted before destroying the IOThread. */ qemu_bh_delete(mon_global.qmp_dispatcher_bh); mon_global.qmp_dispatcher_bh =3D NULL; + qemu_bh_delete(mon_global.qmp_respond_bh); + mon_global.qmp_respond_bh =3D NULL; =20 iothread_destroy(mon_global.mon_iothread); mon_global.mon_iothread =3D NULL; --=20 2.14.3 From nobody Tue Apr 30 15:39:40 2024 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 Return-Path: Received: from lists.gnu.org (208.118.235.17 [208.118.235.17]) by mx.zohomail.com with SMTPS id 151245390646087.25042546026589; Mon, 4 Dec 2017 22:05:06 -0800 (PST) Received: from localhost ([::1]:46658 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eM6Lk-0006ho-Mq for importer@patchew.org; Tue, 05 Dec 2017 01:05:00 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:34373) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eM6CB-0004xX-Fe for qemu-devel@nongnu.org; Tue, 05 Dec 2017 00:55:08 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eM6C8-0002ZA-VZ for qemu-devel@nongnu.org; Tue, 05 Dec 2017 00:55:07 -0500 Received: from mx1.redhat.com ([209.132.183.28]:38486) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1eM6C8-0002Xq-P4 for qemu-devel@nongnu.org; Tue, 05 Dec 2017 00:55:04 -0500 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id DAAB1C0587D8; Tue, 5 Dec 2017 05:55:03 +0000 (UTC) Received: from xz-mi.nay.redhat.com (dhcp-14-111.nay.redhat.com [10.66.14.111]) by smtp.corp.redhat.com (Postfix) with ESMTP id CCF3661783; Tue, 5 Dec 2017 05:54:54 +0000 (UTC) From: Peter Xu To: qemu-devel@nongnu.org Date: Tue, 5 Dec 2017 13:51:56 +0800 Message-Id: <20171205055200.16305-23-peterx@redhat.com> In-Reply-To: <20171205055200.16305-1-peterx@redhat.com> References: <20171205055200.16305-1-peterx@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.32]); Tue, 05 Dec 2017 05:55:03 +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] [RFC v5 22/26] monitor: enable IO thread for (qmp & !mux) typed 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" Start to use dedicate IO thread for QMP monitors that are not using MUXed chardev. Reviewed-by: Dr. David Alan Gilbert Signed-off-by: Peter Xu Reviewed-by: Stefan Hajnoczi --- monitor.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/monitor.c b/monitor.c index 298703d90f..e864b17ed9 100644 --- a/monitor.c +++ b/monitor.c @@ -36,6 +36,7 @@ #include "net/net.h" #include "net/slirp.h" #include "chardev/char-fe.h" +#include "chardev/char-mux.h" #include "ui/qemu-spice.h" #include "sysemu/numa.h" #include "monitor/monitor.h" @@ -4456,7 +4457,7 @@ void monitor_init(Chardev *chr, int flags) Monitor *mon =3D g_malloc(sizeof(*mon)); GMainContext *context; =20 - monitor_data_init(mon, false, false); + monitor_data_init(mon, false, !CHARDEV_IS_MUX(chr)); =20 qemu_chr_fe_init(&mon->chr, chr, &error_abort); mon->flags =3D flags; --=20 2.14.3 From nobody Tue Apr 30 15:39:40 2024 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 Return-Path: Received: from lists.gnu.org (208.118.235.17 [208.118.235.17]) by mx.zohomail.com with SMTPS id 1512454269786578.5905126562602; Mon, 4 Dec 2017 22:11:09 -0800 (PST) Received: from localhost ([::1]:46697 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eM6Rc-00045u-0f for importer@patchew.org; Tue, 05 Dec 2017 01:11:04 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:34414) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eM6CL-00058m-KA for qemu-devel@nongnu.org; Tue, 05 Dec 2017 00:55:18 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eM6CJ-0002eA-0T for qemu-devel@nongnu.org; Tue, 05 Dec 2017 00:55:17 -0500 Received: from mx1.redhat.com ([209.132.183.28]:49424) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1eM6CI-0002dW-Ge for qemu-devel@nongnu.org; Tue, 05 Dec 2017 00:55:14 -0500 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 95189C04AC4D; Tue, 5 Dec 2017 05:55:13 +0000 (UTC) Received: from xz-mi.nay.redhat.com (dhcp-14-111.nay.redhat.com [10.66.14.111]) by smtp.corp.redhat.com (Postfix) with ESMTP id 5D45B5C54E; Tue, 5 Dec 2017 05:55:04 +0000 (UTC) From: Peter Xu To: qemu-devel@nongnu.org Date: Tue, 5 Dec 2017 13:51:57 +0800 Message-Id: <20171205055200.16305-24-peterx@redhat.com> In-Reply-To: <20171205055200.16305-1-peterx@redhat.com> References: <20171205055200.16305-1-peterx@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.31]); Tue, 05 Dec 2017 05:55:13 +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] [RFC v5 23/26] 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. Signed-off-by: Peter Xu Reviewed-by: Stefan Hajnoczi --- qapi-schema.json | 18 ++++++++++++++++++ qmp.c | 16 ++++++++++++++++ 2 files changed, 34 insertions(+) diff --git a/qapi-schema.json b/qapi-schema.json index 9d2625b6b3..5bd59bd266 100644 --- a/qapi-schema.json +++ b/qapi-schema.json @@ -3256,3 +3256,21 @@ ## { 'event': 'REQUEST_DROPPED' , 'data': { 'id': 'any', 'reason': 'RequestDropReason' } } + +## +# @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 e8c303116a..ca2968aad2 100644 --- a/qmp.c +++ b/qmp.c @@ -722,3 +722,19 @@ 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 From nobody Tue Apr 30 15:39:40 2024 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 Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1512454237767482.31313988908596; Mon, 4 Dec 2017 22:10:37 -0800 (PST) Received: from localhost ([::1]:46696 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eM6R5-0003fe-Fc for importer@patchew.org; Tue, 05 Dec 2017 01:10:31 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:34435) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eM6CW-0005JV-56 for qemu-devel@nongnu.org; Tue, 05 Dec 2017 00:55:29 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eM6CT-0002jp-FV for qemu-devel@nongnu.org; Tue, 05 Dec 2017 00:55:28 -0500 Received: from mx1.redhat.com ([209.132.183.28]:49478) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1eM6CT-0002jk-2K for qemu-devel@nongnu.org; Tue, 05 Dec 2017 00:55:25 -0500 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 2AAF6C049D5F; Tue, 5 Dec 2017 05:55:24 +0000 (UTC) Received: from xz-mi.nay.redhat.com (dhcp-14-111.nay.redhat.com [10.66.14.111]) by smtp.corp.redhat.com (Postfix) with ESMTP id 14E9765E86; Tue, 5 Dec 2017 05:55:13 +0000 (UTC) From: Peter Xu To: qemu-devel@nongnu.org Date: Tue, 5 Dec 2017 13:51:58 +0800 Message-Id: <20171205055200.16305-25-peterx@redhat.com> In-Reply-To: <20171205055200.16305-1-peterx@redhat.com> References: <20171205055200.16305-1-peterx@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.31]); Tue, 05 Dec 2017 05:55:24 +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] [RFC v5 24/26] docs: update QMP documents for OOB commands 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" Update both the developer and spec for the new QMP OOB (Out-Of-Band) command. Signed-off-by: Peter Xu --- docs/devel/qapi-code-gen.txt | 51 +++++++++++++++++++++++++++++++++++++++-= ---- docs/interop/qmp-spec.txt | 49 ++++++++++++++++++++++++++++++++++++----= -- 2 files changed, 89 insertions(+), 11 deletions(-) diff --git a/docs/devel/qapi-code-gen.txt b/docs/devel/qapi-code-gen.txt index f04c63fe82..8597fdb087 100644 --- a/docs/devel/qapi-code-gen.txt +++ b/docs/devel/qapi-code-gen.txt @@ -556,7 +556,8 @@ following example objects: =20 Usage: { 'command': STRING, '*data': COMPLEX-TYPE-NAME-OR-DICT, '*returns': TYPE-NAME, '*boxed': true, - '*gen': false, '*success-response': false } + '*gen': false, '*success-response': false, + '*allow-oob': false } =20 Commands are defined by using a dictionary containing several members, where three members are most common. The 'command' member is a @@ -636,6 +637,44 @@ possible, the command expression should include the op= tional key 'success-response' with boolean value false. So far, only QGA makes use of this member. =20 +Most of the QMP commands are handled sequentially in such a order: +Firstly, the JSON Parser parses the command request into some internal +message, delivers the message to QMP dispatchers. Secondly, the QMP +dispatchers will handle the commands one by one in time order, respond +when necessary. For some commands that always complete "quickly" can +instead be executed directly during parsing, at the QMP client's +request. This kind of commands that allow direct execution is called +"out-of-band" ("oob" as shortcut) commands. The response can overtake +prior in-band commands' responses. By default, commands are always +in-band. We need to explicitly specify "allow-oob" to "True" to show +that one command can be run out-of-band. + +One thing to mention for developers is that, although out-of-band +execution of commands benefit from quick and asynchronous execution, +it need to satisfy at least the following: + +(1) It is extremely quick and never blocks, so that its execution will + not block parsing routine of any other monitors. + +(2) It does not need BQL, since the parser can be run without BQL, + while the dispatcher is always with BQL held. + +If not, the command is not suitable to be allowed to run out-of-band, +and it should set its "allow-oob" to "False". Whether a command is +allowed to run out-of-band can also be introspected using +query-qmp-schema command. Please see the section "Client JSON +Protocol introspection" for more information. + +To execute a command in out-of-band way, we need to specify the +"control" field in the request, with "run-oob" set to true. Example: + + =3D> { "execute": "command-support-oob", + "arguments": { ... }, + "control": { "run-oob": true } } + <=3D { "return": { } } + +Without it, even the commands that supports out-of-band execution will +still be run in-band. =20 =3D=3D=3D Events =3D=3D=3D =20 @@ -739,10 +778,12 @@ references by name. QAPI schema definitions not reachable that way are omitted. =20 The SchemaInfo for a command has meta-type "command", and variant -members "arg-type" and "ret-type". On the wire, the "arguments" -member of a client's "execute" command must conform to the object type -named by "arg-type". The "return" member that the server passes in a -success response conforms to the type named by "ret-type". +members "arg-type", "ret-type" and "allow-oob". On the wire, the +"arguments" member of a client's "execute" command must conform to the +object type named by "arg-type". The "return" member that the server +passes in a success response conforms to the type named by +"ret-type". When "allow-oob" is set, it means the command supports +out-of-band execution. =20 If the command takes no arguments, "arg-type" names an object type without members. Likewise, if the command returns nothing, "ret-type" diff --git a/docs/interop/qmp-spec.txt b/docs/interop/qmp-spec.txt index f8b5356015..01a2df0c79 100644 --- a/docs/interop/qmp-spec.txt +++ b/docs/interop/qmp-spec.txt @@ -78,21 +78,44 @@ The greeting message format is: - The "capabilities" member specify the availability of features beyond the baseline specification; the order of elements in this array has no particular significance, so a client must search the entire array - when looking for a particular capability + when looking for a particular capability. =20 2.2.1 Capabilities ------------------ =20 -As of the date this document was last revised, no server or client -capability strings have been defined. - +Currently supported capabilities are: + +- "oob": it means the QMP server supports "Out-Of-Band" command + execution. For more detail, please see "run-oob" parameter in + "Issuing Commands" section below. Not all commands allow this "oob" + execution. One can know whether one command supports "oob" by + "query-qmp-schema" command. + + NOTE: Converting an existing QMP command to be OOB-capable can be + either very easy or extremely hard. The most important thing is + that OOB-capable command should never be blocked for a long time. + Some bad examples: (1) doing IOs, especially when the backend can be + an NFS storage; or (2) accessing guest memories, which can be simply + blocked for a very long time when it triggers a page fault, which + may not be handled immediately. It's still legal to take a mutex in + an OOB-capable command handler, however, we need to make sure that + all the other code paths that are protected by the same lock won't + be blocked very long as well, otherwise the OOB handler might be + blocked too when it tries to take the lock. + +QMP clients can get a list of supported QMP capabilities of the QMP +server in the greeting message mentioned above. By default, all the +capabilities are off. To enable a specific or multiple of QMP +capabilities, QMP client needs to send "qmp_capabilities" command with +extra parameter for the capabilities. =20 2.3 Issuing Commands -------------------- =20 The format for command execution is: =20 -{ "execute": json-string, "arguments": json-object, "id": json-value } +{ "execute": json-string, "arguments": json-object, "id": json-value, + "control": json-dict } =20 Where, =20 @@ -102,10 +125,19 @@ The format for command execution is: required. Each command documents what contents will be considered valid when handling the json-argument - The "id" member is a transaction identification associated with the - command execution, it is optional and will be part of the response if + command execution. It is required if OOB is enabled, and optional + if not. The same "id" field will be part of the response if provided. The "id" member can be any json-value, although most clients merely use a json-number incremented for each successive command +- The "control" member is optionally, and currently only used for + "out-of-band" execution. For some commands that always complete + "quickly" can be executed directly during parsing at the QMP + client's request. This kind of commands that allow direct execution + is called "out-of-band" ("oob" as shortcut) commands. The response + of "oob" commands can overtake prior in-band commands' responses. + To enable "oob" feature, just provide a control field with: + { "control": { "run-oob": true } } =20 2.4 Commands Responses ---------------------- @@ -113,6 +145,11 @@ The format for command execution is: There are two possible responses which the Server will issue as the result of a command execution: success or error. =20 +As long as the commands were issued with a proper "id" field, then the +same "id" field will be attached in the corresponding response message +so that requests and responses can match. Clients should drop all the +responses that are with unknown "id" field. + 2.4.1 success ------------- =20 --=20 2.14.3 From nobody Tue Apr 30 15:39:40 2024 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 Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1512454373580788.7273466000254; Mon, 4 Dec 2017 22:12:53 -0800 (PST) Received: from localhost ([::1]:46708 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eM6TJ-00063F-Ov for importer@patchew.org; Tue, 05 Dec 2017 01:12:49 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:34645) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eM6D1-0005mC-IA for qemu-devel@nongnu.org; Tue, 05 Dec 2017 00:56:00 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eM6Cz-0002wN-1B for qemu-devel@nongnu.org; Tue, 05 Dec 2017 00:55:59 -0500 Received: from mx1.redhat.com ([209.132.183.28]:36274) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1eM6Cy-0002w1-R2 for qemu-devel@nongnu.org; Tue, 05 Dec 2017 00:55:56 -0500 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id E15397EA83; Tue, 5 Dec 2017 05:55:55 +0000 (UTC) Received: from xz-mi.nay.redhat.com (dhcp-14-111.nay.redhat.com [10.66.14.111]) by smtp.corp.redhat.com (Postfix) with ESMTP id 9C7DE5C54E; Tue, 5 Dec 2017 05:55:24 +0000 (UTC) From: Peter Xu To: qemu-devel@nongnu.org Date: Tue, 5 Dec 2017 13:51:59 +0800 Message-Id: <20171205055200.16305-26-peterx@redhat.com> In-Reply-To: <20171205055200.16305-1-peterx@redhat.com> References: <20171205055200.16305-1-peterx@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.28]); Tue, 05 Dec 2017 05:55:55 +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] [RFC v5 25/26] tests: qmp-test: verify command batching 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" OOB introduced DROP event for flow control. This should not affect old QMP clients. Add a command batching check to make sure of it. Signed-off-by: Peter Xu Reviewed-by: Stefan Hajnoczi --- tests/qmp-test.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/tests/qmp-test.c b/tests/qmp-test.c index 292c5f135a..729ec59b0a 100644 --- a/tests/qmp-test.c +++ b/tests/qmp-test.c @@ -78,6 +78,7 @@ static void test_qmp_protocol(void) QList *capabilities; const QListEntry *entry; QString *qstr; + int i; =20 global_qtest =3D qtest_init_without_qmp_handshake(common_args); =20 @@ -135,6 +136,24 @@ static void test_qmp_protocol(void) g_assert_cmpint(qdict_get_int(resp, "id"), =3D=3D, 2); QDECREF(resp); =20 + /* + * Test command batching. In current test OOB is not enabled, we + * should be able to run as many commands in batch as we like. + * Using 16 (>8, which is OOB queue length) to make sure OOB + * won't break existing clients. + */ + for (i =3D 0; i < 16; i++) { + qmp_async("{ 'execute': 'query-version' }"); + } + /* Verify the replies to make sure no command is dropped. */ + for (i =3D 0; i < 16; i++) { + resp =3D qmp_receive(); + /* It should never be dropped. Each of them should be a reply. */ + g_assert(qdict_haskey(resp, "return")); + g_assert(!qdict_haskey(resp, "event")); + QDECREF(resp); + } + qtest_end(); } =20 --=20 2.14.3 From nobody Tue Apr 30 15:39:40 2024 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 Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1512454340419876.6495389315347; Mon, 4 Dec 2017 22:12:20 -0800 (PST) Received: from localhost ([::1]:46707 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eM6Sm-0004wt-KP for importer@patchew.org; Tue, 05 Dec 2017 01:12:16 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:34838) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eM6DJ-00062x-5Z for qemu-devel@nongnu.org; Tue, 05 Dec 2017 00:56:18 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eM6DI-00038G-7O for qemu-devel@nongnu.org; Tue, 05 Dec 2017 00:56:17 -0500 Received: from mx1.redhat.com ([209.132.183.28]:47772) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1eM6DH-00037g-Vd for qemu-devel@nongnu.org; Tue, 05 Dec 2017 00:56:16 -0500 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 1732680F79; Tue, 5 Dec 2017 05:56:15 +0000 (UTC) Received: from xz-mi.nay.redhat.com (dhcp-14-111.nay.redhat.com [10.66.14.111]) by smtp.corp.redhat.com (Postfix) with ESMTP id 609D5171A1; Tue, 5 Dec 2017 05:55:56 +0000 (UTC) From: Peter Xu To: qemu-devel@nongnu.org Date: Tue, 5 Dec 2017 13:52:00 +0800 Message-Id: <20171205055200.16305-27-peterx@redhat.com> In-Reply-To: <20171205055200.16305-1-peterx@redhat.com> References: <20171205055200.16305-1-peterx@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.27]); Tue, 05 Dec 2017 05:56:15 +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] [RFC v5 26/26] tests: qmp-test: add 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" Test the new OOB capability. Here we used the new "x-oob-test" command. Firstly, we send a lock=3Dtrue and oob=3Dfalse command to hang the main thread. Then send another lock=3Dfalse and oob=3Dtrue command (which will be run inside parser this time) to free that hanged command. Signed-off-by: Peter Xu Reviewed-by: Stefan Hajnoczi --- tests/qmp-test.c | 61 ++++++++++++++++++++++++++++++++++++++++++++++++++++= ++++ 1 file changed, 61 insertions(+) diff --git a/tests/qmp-test.c b/tests/qmp-test.c index 729ec59b0a..bb12122a4e 100644 --- a/tests/qmp-test.c +++ b/tests/qmp-test.c @@ -157,6 +157,66 @@ static void test_qmp_protocol(void) qtest_end(); } =20 +/* Tests for Out-Of-Band support. */ +static void test_qmp_oob(void) +{ + QDict *resp; + int acks =3D 0; + const char *cmd_id; + + global_qtest =3D qtest_init_without_qmp_handshake(common_args); + + /* Ignore the greeting message. */ + resp =3D qmp_receive(); + g_assert(qdict_get_qdict(resp, "QMP")); + QDECREF(resp); + + /* Try a fake capability, it should fail. */ + resp =3D qmp("{ 'execute': 'qmp_capabilities', " + " 'arguments': { 'enable': [ 'cap-does-not-exist' ] } }"); + g_assert(qdict_haskey(resp, "error")); + + /* Now, enable OOB in current QMP session, it should success. */ + resp =3D qmp("{ 'execute': 'qmp_capabilities', " + " 'arguments': { 'enable': [ 'oob' ] } }"); + g_assert(qdict_haskey(resp, "return")); + + /* + * Try any command that does not support OOB but with OOB flag. We + * should get failure. + */ + resp =3D qmp("{ 'execute': 'query-cpus'," + " 'control': { 'run-oob': true } }"); + g_assert(qdict_haskey(resp, "error")); + + /* + * Firstly send the "x-oob-test" command with lock=3Dtrue and + * oob=3Dfalse, it should hang the dispatcher and main thread; + * later, we send another lock=3Dfalse with oob=3Dtrue to continue + * that thread processing. Finally we should receive replies from + * both commands. + */ + qmp_async("{ 'execute': 'x-oob-test'," + " 'arguments': { 'lock': true }, " + " 'id': 'lock-cmd'}"); + qmp_async("{ 'execute': 'x-oob-test', " + " 'arguments': { 'lock': false }, " + " 'control': { 'run-oob': true }, " + " 'id': 'unlock-cmd' }"); + + /* Ignore all events. Wait for 2 acks */ + while (acks < 2) { + resp =3D qmp_receive(); + cmd_id =3D qdict_get_str(resp, "id"); + if (!g_strcmp0(cmd_id, "lock-cmd") || + !g_strcmp0(cmd_id, "unlock-cmd")) { + acks++; + } + } + + qtest_end(); +} + static int query_error_class(const char *cmd) { static struct { @@ -335,6 +395,7 @@ int main(int argc, char *argv[]) g_test_init(&argc, &argv, NULL); =20 qtest_add_func("qmp/protocol", test_qmp_protocol); + qtest_add_func("qmp/oob", test_qmp_oob); qmp_schema_init(&schema); add_query_tests(&schema); =20 --=20 2.14.3