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David Alan Gilbert" , Jason Wang , Eric Blake , Markus Armbruster Date: Thu, 28 Jun 2018 04:41:28 +0800 Message-Id: <20180627204136.4177-13-zhangckid@gmail.com> X-Mailer: git-send-email 2.17.0 In-Reply-To: <20180627204136.4177-1-zhangckid@gmail.com> References: <20180627204136.4177-1-zhangckid@gmail.com> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2607:f8b0:400e:c05::241 Subject: [Qemu-devel] [PATCH V9 12/20] qapi: Add new command to query colo status 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: zhanghailiang , Li Zhijian , Zhang Chen Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZohoMail: RDKM_2 RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Libvirt or other high level software can use this command query colo status. You can test this command like that: {'execute':'query-colo-status'} Signed-off-by: Zhang Chen --- migration/colo.c | 39 +++++++++++++++++++++++++++++++++++++++ qapi/migration.json | 34 ++++++++++++++++++++++++++++++++++ 2 files changed, 73 insertions(+) diff --git a/migration/colo.c b/migration/colo.c index 8fdb79ac73..eb21978bff 100644 --- a/migration/colo.c +++ b/migration/colo.c @@ -29,6 +29,7 @@ #include "net/colo.h" #include "block/block.h" #include "qapi/qapi-events-migration.h" +#include "qapi/qmp/qerror.h" =20 static bool vmstate_loading; static Notifier packets_compare_notifier; @@ -237,6 +238,44 @@ void qmp_xen_colo_do_checkpoint(Error **errp) #endif } =20 +COLOStatus *qmp_query_colo_status(Error **errp) +{ + int state; + COLOStatus *s =3D g_new0(COLOStatus, 1); + + s->mode =3D get_colo_mode(); + + switch (s->mode) { + case COLO_MODE_NONE: + error_setg(errp, "COLO is disabled"); + state =3D MIGRATION_STATUS_NONE; + break; + case COLO_MODE_PRIMARY: + state =3D migrate_get_current()->state; + break; + case COLO_MODE_SECONDARY: + state =3D migration_incoming_get_current()->state; + break; + default: + abort(); + } + + s->active =3D state =3D=3D MIGRATION_STATUS_COLO; + + switch (failover_get_state()) { + case FAILOVER_STATUS_NONE: + s->reason =3D COLO_EXIT_REASON_NONE; + break; + case FAILOVER_STATUS_REQUIRE: + s->reason =3D COLO_EXIT_REASON_REQUEST; + break; + default: + s->reason =3D COLO_EXIT_REASON_ERROR; + } + + return s; +} + static void colo_send_message(QEMUFile *f, COLOMessage msg, Error **errp) { diff --git a/qapi/migration.json b/qapi/migration.json index c24f114104..73c64686ec 100644 --- a/qapi/migration.json +++ b/qapi/migration.json @@ -1248,6 +1248,40 @@ ## { 'command': 'xen-colo-do-checkpoint' } =20 +## +# @COLOStatus: +# +# The result format for 'query-colo-status'. +# +# @mode: COLO running mode. If COLO is running, this field will return +# 'primary' or 'secondary'. +# +# @active: true if COLO is active. +# +# @reason: describes the reason for the COLO exit. +# +# Since: 3.0 +## +{ 'struct': 'COLOStatus', + 'data': { 'mode': 'COLOMode', 'active': 'bool', 'reason': 'COLOExitReaso= n' } } + +## +# @query-colo-status: +# +# Query COLO status while the vm is running. +# +# Returns: A @COLOStatus object showing the status. +# +# Example: +# +# -> { "execute": "query-colo-status" } +# <- { "return": { "mode": "primary", "active": true, "reason": "request" = } } +# +# Since: 3.0 +## +{ 'command': 'query-colo-status', + 'returns': 'COLOStatus' } + ## # @migrate-recover: # --=20 2.17.GIT