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Wed, 7 Jul 2021 17:27:09 +0000 From: Steve Sistare To: qemu-devel@nongnu.org Subject: [PATCH V5 04/25] cpr: HMP interfaces for reboot Date: Wed, 7 Jul 2021 10:20:13 -0700 Message-Id: <1625678434-240960-5-git-send-email-steven.sistare@oracle.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1625678434-240960-1-git-send-email-steven.sistare@oracle.com> References: <1625678434-240960-1-git-send-email-steven.sistare@oracle.com> Content-Type: text/plain X-ClientProxiedBy: SJ0PR03CA0104.namprd03.prod.outlook.com (2603:10b6:a03:333::19) To BYAPR10MB3240.namprd10.prod.outlook.com (2603:10b6:a03:155::17) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from ca-dev63.us.oracle.com (148.87.23.13) by SJ0PR03CA0104.namprd03.prod.outlook.com (2603:10b6:a03:333::19) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4308.21 via Frontend Transport; Wed, 7 Jul 2021 17:27:08 +0000 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 6ce4e29d-a5c8-402c-be18-08d9416c72f7 X-MS-TrafficTypeDiagnostic: BYAPR10MB4104: X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:386; 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envelope-from=steven.sistare@oracle.com; helo=mx0b-00069f02.pphosted.com X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, MSGID_FROM_MTA_HEADER=0.001, RCVD_IN_DNSWL_LOW=-0.7, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: "Daniel P. Berrange" , "Michael S. Tsirkin" , Jason Zeng , =?UTF-8?q?Alex=20Benn=C3=A9e?= , Juan Quintela , "Dr. David Alan Gilbert" , Eric Blake , Markus Armbruster , Alex Williamson , Steve Sistare , Stefan Hajnoczi , =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= , Paolo Bonzini , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" cprsave Call cprsave(). Arguments: file : save vmstate to this file name mode: must be "reboot" cprload Call cprload(). Arguments: file : load vmstate from this file name cprinfo Print to stdout a space-delimited list of modes supported by cprsave. Arguments: none Signed-off-by: Mark Kanda Signed-off-by: Steve Sistare --- hmp-commands.hx | 44 ++++++++++++++++++++++++++++++++++++++++++++ include/monitor/hmp.h | 3 +++ monitor/hmp-cmds.c | 48 ++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 95 insertions(+) diff --git a/hmp-commands.hx b/hmp-commands.hx index 8e45bce..11827ae 100644 --- a/hmp-commands.hx +++ b/hmp-commands.hx @@ -351,6 +351,50 @@ SRST ERST { + .name = "cprinfo", + .args_type = "", + .params = "", + .help = "return list of modes supported by cprsave", + .cmd = hmp_cprinfo, + }, + +SRST +``cprinfo`` +Return a space-delimited list of modes supported by cprsave. +ERST + + { + .name = "cprsave", + .args_type = "file:s,mode:s", + .params = "file 'reboot'", + .help = "create a checkpoint of the VM in file", + .cmd = hmp_cprsave, + }, + +SRST +``cprsave`` *file* *mode* +Pause the VCPUs, +create a checkpoint of the whole virtual machine, and save it in *file*. +If *mode* is 'reboot', the checkpoint remains valid after a host kexec +reboot, and guest ram must be backed by persistant shared memory. To +resume from the checkpoint, issue the quit command, reboot the system, +and issue the cprload command. +ERST + + { + .name = "cprload", + .args_type = "file:s", + .params = "file", + .help = "load VM checkpoint from file", + .cmd = hmp_cprload, + }, + +SRST +``cprload`` *file* +Load a virtual machine from checkpoint file *file* and continue VCPUs. +ERST + + { .name = "delvm", .args_type = "name:s", .params = "tag", diff --git a/include/monitor/hmp.h b/include/monitor/hmp.h index 3baa105..98bb775 100644 --- a/include/monitor/hmp.h +++ b/include/monitor/hmp.h @@ -58,6 +58,9 @@ void hmp_balloon(Monitor *mon, const QDict *qdict); void hmp_loadvm(Monitor *mon, const QDict *qdict); void hmp_savevm(Monitor *mon, const QDict *qdict); void hmp_delvm(Monitor *mon, const QDict *qdict); +void hmp_cprinfo(Monitor *mon, const QDict *qdict); +void hmp_cprsave(Monitor *mon, const QDict *qdict); +void hmp_cprload(Monitor *mon, const QDict *qdict); void hmp_migrate_cancel(Monitor *mon, const QDict *qdict); void hmp_migrate_continue(Monitor *mon, const QDict *qdict); void hmp_migrate_incoming(Monitor *mon, const QDict *qdict); diff --git a/monitor/hmp-cmds.c b/monitor/hmp-cmds.c index 0942027..8e80581 100644 --- a/monitor/hmp-cmds.c +++ b/monitor/hmp-cmds.c @@ -33,6 +33,7 @@ #include "qapi/qapi-commands-block.h" #include "qapi/qapi-commands-char.h" #include "qapi/qapi-commands-control.h" +#include "qapi/qapi-commands-cpr.h" #include "qapi/qapi-commands-machine.h" #include "qapi/qapi-commands-migration.h" #include "qapi/qapi-commands-misc.h" @@ -1177,6 +1178,53 @@ void hmp_announce_self(Monitor *mon, const QDict *qdict) qapi_free_AnnounceParameters(params); } +void hmp_cprinfo(Monitor *mon, const QDict *qdict) +{ + Error *err = NULL; + CprInfo *cprinfo; + CprModeList *mode; + + cprinfo = qmp_cprinfo(&err); + if (err) { + goto out; + } + + for (mode = cprinfo->modes; mode; mode = mode->next) { + monitor_printf(mon, "%s ", CprMode_str(mode->value)); + } + +out: + hmp_handle_error(mon, err); + qapi_free_CprInfo(cprinfo); +} + +void hmp_cprsave(Monitor *mon, const QDict *qdict) +{ + Error *err = NULL; + const char *mode; + int val; + + mode = qdict_get_try_str(qdict, "mode"); + val = qapi_enum_parse(&CprMode_lookup, mode, -1, &err); + + if (val == -1) { + goto out; + } + + qmp_cprsave(qdict_get_try_str(qdict, "file"), val, &err); + +out: + hmp_handle_error(mon, err); +} + +void hmp_cprload(Monitor *mon, const QDict *qdict) +{ + Error *err = NULL; + + qmp_cprload(qdict_get_try_str(qdict, "file"), &err); + hmp_handle_error(mon, err); +} + void hmp_migrate_cancel(Monitor *mon, const QDict *qdict) { qmp_migrate_cancel(NULL); -- 1.8.3.1