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[Qemu-devel] [PULL 10/25] qmp event: Add COLO_EXIT event to notify users
From: |
Jason Wang |
Subject: |
[Qemu-devel] [PULL 10/25] qmp event: Add COLO_EXIT event to notify users while exited COLO |
Date: |
Wed, 26 Sep 2018 11:16:35 +0800 |
From: zhanghailiang <address@hidden>
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 <address@hidden>
Signed-off-by: Li Zhijian <address@hidden>
Signed-off-by: Zhang Chen <address@hidden>
Signed-off-by: Zhang Chen <address@hidden>
Signed-off-by: Jason Wang <address@hidden>
---
migration/colo.c | 31 +++++++++++++++++++++++++++++++
qapi/migration.json | 38 ++++++++++++++++++++++++++++++++++++++
2 files changed, 69 insertions(+)
diff --git a/migration/colo.c b/migration/colo.c
index d3163b51c8..bd7390d6aa 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 get 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);
+ break;
+ case FAILOVER_STATUS_REQUIRE:
+ qapi_event_send_colo_exit(COLO_MODE_PRIMARY,
+ COLO_EXIT_REASON_REQUEST);
+ 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);
@@ -746,6 +764,19 @@ 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);
+ break;
+ case FAILOVER_STATUS_REQUIRE:
+ qapi_event_send_colo_exit(COLO_MODE_SECONDARY,
+ COLO_EXIT_REASON_REQUEST);
+ break;
+ default:
+ abort();
+ }
+
if (fb) {
qemu_fclose(fb);
}
diff --git a/qapi/migration.json b/qapi/migration.json
index f62d3f9a4b..9b3b1c0c4e 100644
--- a/qapi/migration.json
+++ b/qapi/migration.json
@@ -932,6 +932,44 @@
{ '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: 3.1
+#
+# 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: 3.1
+##
+{ 'enum': 'COLOExitReason',
+ 'data': [ 'none', 'request', 'error' ] }
+
##
# @x-colo-lost-heartbeat:
#
--
2.17.1
- [Qemu-devel] [PULL 21/25] ne2000: fix possible out of bound access in ne2000_receive, (continued)
- [Qemu-devel] [PULL 21/25] ne2000: fix possible out of bound access in ne2000_receive, Jason Wang, 2018/09/25
- [Qemu-devel] [PULL 17/25] COLO: notify net filters about checkpoint/failover event, Jason Wang, 2018/09/25
- [Qemu-devel] [PULL 18/25] COLO: quick failover process by kick COLO thread, Jason Wang, 2018/09/25
- [Qemu-devel] [PULL 13/25] savevm: split the process of different stages for loadvm/savevm, Jason Wang, 2018/09/25
- [Qemu-devel] [PULL 15/25] filter: Add handle_event method for NetFilterClass, Jason Wang, 2018/09/25
- [Qemu-devel] [PULL 11/25] qapi/migration.json: Rename COLO unknown mode to none mode., Jason Wang, 2018/09/25
- [Qemu-devel] [PULL 05/25] COLO: Add block replication into colo process, Jason Wang, 2018/09/25
- [Qemu-devel] [PULL 07/25] COLO: Load dirty pages into SVM's RAM cache firstly, Jason Wang, 2018/09/25
- [Qemu-devel] [PULL 16/25] filter-rewriter: handle checkpoint and failover event, Jason Wang, 2018/09/25
- [Qemu-devel] [PULL 12/25] qapi: Add new command to query colo status, Jason Wang, 2018/09/25
- [Qemu-devel] [PULL 10/25] qmp event: Add COLO_EXIT event to notify users while exited COLO,
Jason Wang <=
- [Qemu-devel] [PULL 09/25] COLO: Flush memory data from ram cache, Jason Wang, 2018/09/25
- [Qemu-devel] [PULL 08/25] ram/COLO: Record the dirty pages that SVM received, Jason Wang, 2018/09/25
- [Qemu-devel] [PULL 01/25] filter-rewriter: Add TCP state machine and fix memory leak in connection_track_table, Jason Wang, 2018/09/25
- [Qemu-devel] [PULL 04/25] COLO: integrate colo compare with colo frame, Jason Wang, 2018/09/25
- [Qemu-devel] [PULL 03/25] colo-compare: use notifier to notify packets comparing result, Jason Wang, 2018/09/25
- [Qemu-devel] [PULL 02/25] colo-compare: implement the process of checkpoint, Jason Wang, 2018/09/25
- [Qemu-devel] [PULL 06/25] COLO: Remove colo_state migration struct, Jason Wang, 2018/09/25