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migration: Display error in query-migrate irrelevant of status 

Display it as long as being set, irrelevant of FAILED status.  E.g., it may
also be applicable to PAUSED stage of postcopy, to provide hint on what has
gone wrong.

The error_mutex seems to be overlooked when referencing the error, add it
to be very safe.

This will change QAPI behavior by showing up error message outside !FAILED
status, but it's intended and doesn't expect to break anyone.

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2018404
Reviewed-by: Fabiano Rosas <farosas@suse.de>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
Message-ID: <20231004220240.167175-2-peterx@redhat.com>
This commit is contained in:
Peter Xu 2023-10-04 18:02:31 -04:00 committed by Juan Quintela
parent 2c88739cfd
commit c94143e587
2 changed files with 7 additions and 6 deletions
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8
migration/migration.c
View File

@ -1060,9 +1060,6 @@ static void fill_source_migration_info(MigrationInfo *info)
break;
case MIGRATION_STATUS_FAILED:
info->has_status = true;
if (s->error) {
info->error_desc = g_strdup(error_get_pretty(s->error));
}
break;
case MIGRATION_STATUS_CANCELLED:
info->has_status = true;
@ -1072,6 +1069,11 @@ static void fill_source_migration_info(MigrationInfo *info)
break;
}
info->status = state;
QEMU_LOCK_GUARD(&s->error_mutex);
if (s->error) {
info->error_desc = g_strdup(error_get_pretty(s->error));
}
}
static void fill_destination_migration_info(MigrationInfo *info)

5
qapi/migration.json
View File

@ -230,9 +230,8 @@
# throttled during auto-converge. This is only present when
# auto-converge has started throttling guest cpus. (Since 2.7)
#
# @error-desc: the human readable error description string, when
# @status is 'failed'. Clients should not attempt to parse the
# error strings. (Since 2.7)
# @error-desc: the human readable error description string. Clients
# should not attempt to parse the error strings. (Since 2.7)
#
# @postcopy-blocktime: total time when all vCPU were blocked during
# postcopy live migration. This is only present when the