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 <zhangc...@gmail.com> --- migration/colo.c | 34 ++++++++++++++++++++++++++++++++++ qapi/migration.json | 33 +++++++++++++++++++++++++++++++++ 2 files changed, 67 insertions(+) diff --git a/migration/colo.c b/migration/colo.c index 8ca63813c2..cdff0a2490 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" static bool vmstate_loading; static Notifier packets_compare_notifier; @@ -237,6 +238,39 @@ void qmp_xen_colo_do_checkpoint(Error **errp) #endif } +COLOStatus *qmp_query_colo_status(Error **errp) +{ + int state; + COLOStatus *s = g_new0(COLOStatus, 1); + + if (get_colo_mode() == COLO_MODE_UNKNOWN) { + error_setg(errp, QERR_FEATURE_DISABLED, "colo"); + s->colo_running = false; + goto out; + } else if (get_colo_mode() == COLO_MODE_PRIMARY) { + state = migrate_get_current()->state; + } else { + state = migration_incoming_get_current()->state; + } + s->colo_running = state == MIGRATION_STATUS_COLO; + +out: + s->mode = get_colo_mode(); + + switch (failover_get_state()) { + case FAILOVER_STATUS_NONE: + s->reason = COLO_EXIT_REASON_NONE; + break; + case FAILOVER_STATUS_REQUIRE: + s->reason = COLO_EXIT_REASON_REQUEST; + break; + default: + s->reason = 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 55dae48089..13589ba948 100644 --- a/qapi/migration.json +++ b/qapi/migration.json @@ -1220,3 +1220,36 @@ # Since: 2.9 ## { 'command': 'xen-colo-do-checkpoint' } + +## +# @COLOStatus: +# +# The result format for 'query-colo-status'. +# +# @mode: which COLO mode the VM was in when it exited. +# +# @colo-running: true if COLO is running. +# +# @reason: describes the reason for the COLO exit. +# +# Since: 2.13 +## +{ 'struct': 'COLOStatus', + 'data': { 'mode': 'COLOMode', 'colo-running': 'bool', 'reason': 'COLOExitReason' } } + +## +# @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", "colo-running": true, "reason": "request" } } +# +# Since: 2.13 +## +{ 'command': 'query-colo-status', + 'returns': 'COLOStatus' } -- 2.17.0