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/*
* QTest migration helpers
*
* Copyright (c) 2016-2018 Red Hat, Inc. and/or its affiliates
* based on the vhost-user-test.c that is:
* Copyright (c) 2014 Virtual Open Systems Sarl.
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*
*/
#include "qemu/osdep.h"
#include "qapi/qmp/qjson.h"
#include "migration-helpers.h"
/*
* Number of seconds we wait when looking for migration
* status changes, to avoid test suite hanging forever
* when things go wrong. Needs to be higher enough to
* avoid false positives on loaded hosts.
*/
#define MIGRATION_STATUS_WAIT_TIMEOUT 120
bool got_stop;
static void check_stop_event(QTestState *who)
{
QDict *event = qtest_qmp_event_ref(who, "STOP");
if (event) {
got_stop = true;
qobject_unref(event);
}
}
/*
* Events can get in the way of responses we are actually waiting for.
*/
QDict *wait_command_fd(QTestState *who, int fd, const char *command, ...)
{
va_list ap;
QDict *resp, *ret;
va_start(ap, command);
qtest_qmp_vsend_fds(who, &fd, 1, command, ap);
va_end(ap);
resp = qtest_qmp_receive(who);
check_stop_event(who);
g_assert(!qdict_haskey(resp, "error"));
g_assert(qdict_haskey(resp, "return"));
ret = qdict_get_qdict(resp, "return");
qobject_ref(ret);
qobject_unref(resp);
return ret;
}
/*
* Events can get in the way of responses we are actually waiting for.
*/
QDict *wait_command(QTestState *who, const char *command, ...)
{
va_list ap;
QDict *resp, *ret;
va_start(ap, command);
resp = qtest_vqmp(who, command, ap);
va_end(ap);
check_stop_event(who);
g_assert(!qdict_haskey(resp, "error"));
g_assert(qdict_haskey(resp, "return"));
ret = qdict_get_qdict(resp, "return");
qobject_ref(ret);
qobject_unref(resp);
return ret;
}
/*
* Send QMP command "migrate".
* Arguments are built from @fmt... (formatted like
* qobject_from_jsonf_nofail()) with "uri": @uri spliced in.
*/
void migrate_qmp(QTestState *who, const char *uri, const char *fmt, ...)
{
va_list ap;
QDict *args, *rsp;
va_start(ap, fmt);
args = qdict_from_vjsonf_nofail(fmt, ap);
va_end(ap);
g_assert(!qdict_haskey(args, "uri"));
qdict_put_str(args, "uri", uri);
rsp = qtest_qmp(who, "{ 'execute': 'migrate', 'arguments': %p}", args);
g_assert(qdict_haskey(rsp, "return"));
qobject_unref(rsp);
}
/*
* Note: caller is responsible to free the returned object via
* qobject_unref() after use
*/
QDict *migrate_query(QTestState *who)
{
return wait_command(who, "{ 'execute': 'query-migrate' }");
}
QDict *migrate_query_not_failed(QTestState *who)
{
const char *status;
QDict *rsp = migrate_query(who);
status = qdict_get_str(rsp, "status");
if (g_str_equal(status, "failed")) {
g_printerr("query-migrate shows failed migration: %s\n",
qdict_get_str(rsp, "error-desc"));
}
g_assert(!g_str_equal(status, "failed"));
return rsp;
}
/*
* Note: caller is responsible to free the returned object via
* g_free() after use
*/
static gchar *migrate_query_status(QTestState *who)
{
QDict *rsp_return = migrate_query(who);
gchar *status = g_strdup(qdict_get_str(rsp_return, "status"));
g_assert(status);
qobject_unref(rsp_return);
return status;
}
static bool check_migration_status(QTestState *who, const char *goal,
const char **ungoals)
{
bool ready;
char *current_status;
const char **ungoal;
current_status = migrate_query_status(who);
ready = strcmp(current_status, goal) == 0;
if (!ungoals) {
g_assert_cmpstr(current_status, !=, "failed");
/*
* If looking for a state other than completed,
* completion of migration would cause the test to
* hang.
*/
if (strcmp(goal, "completed") != 0) {
g_assert_cmpstr(current_status, !=, "completed");
}
} else {
for (ungoal = ungoals; *ungoal; ungoal++) {
g_assert_cmpstr(current_status, !=, *ungoal);
}
}
g_free(current_status);
return ready;
}
void wait_for_migration_status(QTestState *who,
const char *goal, const char **ungoals)
{
g_test_timer_start();
while (!check_migration_status(who, goal, ungoals)) {
usleep(1000);
g_assert(g_test_timer_elapsed() < MIGRATION_STATUS_WAIT_TIMEOUT);
}
}
void wait_for_migration_complete(QTestState *who)
{
wait_for_migration_status(who, "completed", NULL);
}
void wait_for_migration_fail(QTestState *from, bool allow_active)
{
g_test_timer_start();
QDict *rsp_return;
char *status;
bool failed;
do {
status = migrate_query_status(from);
bool result = !strcmp(status, "setup") || !strcmp(status, "failed") ||
(allow_active && !strcmp(status, "active"));
if (!result) {
fprintf(stderr, "%s: unexpected status status=%s allow_active=%d\n",
__func__, status, allow_active);
}
g_assert(result);
failed = !strcmp(status, "failed");
g_free(status);
g_assert(g_test_timer_elapsed() < MIGRATION_STATUS_WAIT_TIMEOUT);
} while (!failed);
/* Is the machine currently running? */
rsp_return = wait_command(from, "{ 'execute': 'query-status' }");
g_assert(qdict_haskey(rsp_return, "running"));
g_assert(qdict_get_bool(rsp_return, "running"));
qobject_unref(rsp_return);
}
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