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migration: migrate-continue

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A new qmp command allows the caller to continue from a given
paused state.

Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
This commit is contained in:
Dr. David Alan Gilbert 2017-10-20 10:05:53 +01:00 committed by Juan Quintela
parent e91d8951d5
commit 89cfc02cb6
2 changed files with 28 additions and 0 deletions
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11
migration/migration.c
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@ -1374,6 +1374,17 @@ void qmp_migrate_cancel(Error **errp)
migrate_fd_cancel(migrate_get_current());
}
void qmp_migrate_continue(MigrationStatus state, Error **errp)
{
MigrationState *s = migrate_get_current();
if (s->state != state) {
error_setg(errp, "Migration not in expected state: %s",
MigrationStatus_str(s->state));
return;
}
qemu_sem_post(&s->pause_sem);
}
void qmp_migrate_set_cache_size(int64_t value, Error **errp)
{
MigrationState *s = migrate_get_current();

17
qapi/migration.json
View File

@ -876,6 +876,23 @@
##
{ 'command': 'migrate_cancel' }
##
# @migrate-continue:
#
# Continue migration when it's in a paused state.
#
# @state: The state the migration is currently expected to be in
#
# Returns: nothing on success
# Since: 2.11
# Example:
#
# -> { "execute": "migrate-continue" , "arguments":
# { "state": "pre-switchover" } }
# <- { "return": {} }
##
{ 'command': 'migrate-continue', 'data': {'state': 'MigrationStatus'} }
##
# @migrate_set_downtime:
#