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[35.229.225.197]) by smtp.gmail.com with ESMTPSA id 10-v6sm45841595pgb.40.2018.06.02.22.06.44 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sat, 02 Jun 2018 22:06:48 -0700 (PDT) From: Zhang Chen To: qemu-devel@nongnu.org, Paolo Bonzini , Juan Quintela , "Dr . David Alan Gilbert" , Jason Wang , Eric Blake , Markus Armbruster Date: Sun, 3 Jun 2018 13:05:39 +0800 Message-Id: <20180603050546.6827-11-zhangckid@gmail.com> X-Mailer: git-send-email 2.17.0 In-Reply-To: <20180603050546.6827-1-zhangckid@gmail.com> References: <20180603050546.6827-1-zhangckid@gmail.com> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2607:f8b0:400e:c01::234 Subject: [Qemu-devel] [PATCH V8 10/17] qmp event: Add COLO_EXIT event to notify users while exited COLO 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+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" From: zhanghailiang If some errors happen during VM's COLO FT stage, it's important to notify the users of this event. Together with 'x-colo-lost-heartbeat', Users can intervene in COLO's failover work immediately. If users don't want to get involved in COLO's failover verdict, it is still necessary to notify users that we exited COLO mode. Signed-off-by: zhanghailiang Signed-off-by: Li Zhijian Signed-off-by: Zhang Chen Reviewed-by: Eric Blake Reviewed-by: Markus Armbruster --- migration/colo.c | 31 +++++++++++++++++++++++++++++++ qapi/migration.json | 38 ++++++++++++++++++++++++++++++++++++++ 2 files changed, 69 insertions(+) diff --git a/migration/colo.c b/migration/colo.c index c083d3696f..bedb677788 100644 --- a/migration/colo.c +++ b/migration/colo.c @@ -28,6 +28,7 @@ #include "net/colo-compare.h" #include "net/colo.h" #include "block/block.h" +#include "qapi/qapi-events-migration.h" static bool vmstate_loading; static Notifier packets_compare_notifier; @@ -514,6 +515,23 @@ out: qemu_fclose(fb); } + /* + * There are only two reasons we can go here, some error happened. + * Or the user triggered failover. + */ + switch (failover_get_state()) { + case FAILOVER_STATUS_NONE: + qapi_event_send_colo_exit(COLO_MODE_PRIMARY, + COLO_EXIT_REASON_ERROR, NULL); + break; + case FAILOVER_STATUS_REQUIRE: + qapi_event_send_colo_exit(COLO_MODE_PRIMARY, + COLO_EXIT_REASON_REQUEST, NULL); + break; + default: + abort(); + } + /* Hope this not to be too long to wait here */ qemu_sem_wait(&s->colo_exit_sem); qemu_sem_destroy(&s->colo_exit_sem); @@ -745,6 +763,19 @@ out: error_report_err(local_err); } + switch (failover_get_state()) { + case FAILOVER_STATUS_NONE: + qapi_event_send_colo_exit(COLO_MODE_SECONDARY, + COLO_EXIT_REASON_ERROR, NULL); + break; + case FAILOVER_STATUS_REQUIRE: + qapi_event_send_colo_exit(COLO_MODE_SECONDARY, + COLO_EXIT_REASON_REQUEST, NULL); + break; + default: + abort(); + } + if (fb) { qemu_fclose(fb); } diff --git a/qapi/migration.json b/qapi/migration.json index dc9cc85545..93136ce5a0 100644 --- a/qapi/migration.json +++ b/qapi/migration.json @@ -880,6 +880,44 @@ { 'enum': 'FailoverStatus', 'data': [ 'none', 'require', 'active', 'completed', 'relaunch' ] } +## +# @COLO_EXIT: +# +# Emitted when VM finishes COLO mode due to some errors happening or +# at the request of users. +# +# @mode: report COLO mode when COLO exited. +# +# @reason: describes the reason for the COLO exit. +# +# Since: 2.13 +# +# Example: +# +# <- { "timestamp": {"seconds": 2032141960, "microseconds": 417172}, +# "event": "COLO_EXIT", "data": {"mode": "primary", "reason": "request" } } +# +## +{ 'event': 'COLO_EXIT', + 'data': {'mode': 'COLOMode', 'reason': 'COLOExitReason' } } + +## +# @COLOExitReason: +# +# The reason for a COLO exit +# +# @none: no failover has ever happened, This can't occur in the COLO_EXIT event, +# only in the result of query-colo-status. +# +# @request: COLO exit is due to an external request +# +# @error: COLO exit is due to an internal error +# +# Since: 2.13 +## +{ 'enum': 'COLOExitReason', + 'data': [ 'none', 'request', 'error' ] } + ## # @x-colo-lost-heartbeat: #