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[104.199.227.109]) by smtp.gmail.com with ESMTPSA id p6-v6sm17183532pfg.157.2018.05.13.20.24.53 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Sun, 13 May 2018 20:24:57 -0700 (PDT) From: Zhang Chen To: qemu-devel@nongnu.org Date: Mon, 14 May 2018 11:23:41 +0800 Message-Id: <1526268228-27951-11-git-send-email-zhangckid@gmail.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1526268228-27951-1-git-send-email-zhangckid@gmail.com> References: <1526268228-27951-1-git-send-email-zhangckid@gmail.com> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2607:f8b0:400e:c05::234 Subject: [Qemu-devel] [PATCH V7 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 , Jason Wang , Markus Armbruster , "Dr . David Alan Gilbert" , Zhang Chen , Paolo Bonzini 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 --- migration/colo.c | 20 ++++++++++++++++++++ qapi/migration.json | 37 +++++++++++++++++++++++++++++++++++++ 2 files changed, 57 insertions(+) diff --git a/migration/colo.c b/migration/colo.c index c083d36..8ca6381 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 +515,18 @@ out: qemu_fclose(fb); } + /* + * There are only two reasons we can go here, some error happened. + * Or the user triggered failover. + */ + if (failover_get_state() == FAILOVER_STATUS_NONE) { + qapi_event_send_colo_exit(COLO_MODE_PRIMARY, + COLO_EXIT_REASON_ERROR, NULL); + } else { + qapi_event_send_colo_exit(COLO_MODE_PRIMARY, + COLO_EXIT_REASON_REQUEST, NULL); + } + /* Hope this not to be too long to wait here */ qemu_sem_wait(&s->colo_exit_sem); qemu_sem_destroy(&s->colo_exit_sem); @@ -744,6 +757,13 @@ out: if (local_err) { error_report_err(local_err); } + if (failover_get_state() == FAILOVER_STATUS_NONE) { + qapi_event_send_colo_exit(COLO_MODE_SECONDARY, + COLO_EXIT_REASON_ERROR, NULL); + } else { + qapi_event_send_colo_exit(COLO_MODE_SECONDARY, + COLO_EXIT_REASON_REQUEST, NULL); + } if (fb) { qemu_fclose(fb); diff --git a/qapi/migration.json b/qapi/migration.json index f3974c6..55dae48 100644 --- a/qapi/migration.json +++ b/qapi/migration.json @@ -875,6 +875,43 @@ '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. +# +# @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: # # Tell qemu that heartbeat is lost, request it to do takeover procedures.