tests/qtest/migration-helpers.c

   1 /*
   2  * QTest migration helpers
   3  *
   4  * Copyright (c) 2016-2018 Red Hat, Inc. and/or its affiliates
   5  *   based on the vhost-user-test.c that is:
   6  *      Copyright (c) 2014 Virtual Open Systems Sarl.
   7  *
   8  * This work is licensed under the terms of the GNU GPL, version 2 or later.
   9  * See the COPYING file in the top-level directory.
  10  *
  11  */
  12
  13 #include "qemu/osdep.h"
  14 #include "qapi/qmp/qjson.h"
  15
  16 #include "migration-helpers.h"
  17
  18 /*
  19  * Number of seconds we wait when looking for migration
  20  * status changes, to avoid test suite hanging forever
  21  * when things go wrong. Needs to be higher enough to
  22  * avoid false positives on loaded hosts.
  23  */
  24 #define MIGRATION_STATUS_WAIT_TIMEOUT 120
  25
  26 bool migrate_watch_for_stop(QTestState *who, const char *name,
  27                             QDict *event, void *opaque)
  28 {
  29     bool *seen = opaque;
  30
  31     if (g_str_equal(name, "STOP")) {
  32         *seen = true;
  33         return true;
  34     }
  35
  36     return false;
  37 }
  38
  39 bool migrate_watch_for_resume(QTestState *who, const char *name,
  40                               QDict *event, void *opaque)
  41 {
  42     bool *seen = opaque;
  43
  44     if (g_str_equal(name, "RESUME")) {
  45         *seen = true;
  46         return true;
  47     }
  48
  49     return false;
  50 }
  51
  52 void migrate_qmp_fail(QTestState *who, const char *uri, const char *fmt, ...)
  53 {
  54     va_list ap;
  55     QDict *args, *err;
  56
  57     va_start(ap, fmt);
  58     args = qdict_from_vjsonf_nofail(fmt, ap);
  59     va_end(ap);
  60
  61     g_assert(!qdict_haskey(args, "uri"));
  62     qdict_put_str(args, "uri", uri);
  63
  64     err = qtest_qmp_assert_failure_ref(
  65         who, "{ 'execute': 'migrate', 'arguments': %p}", args);
  66
  67     g_assert(qdict_haskey(err, "desc"));
  68
  69     qobject_unref(err);
  70 }
  71
  72 /*
  73  * Send QMP command "migrate".
  74  * Arguments are built from @fmt... (formatted like
  75  * qobject_from_jsonf_nofail()) with "uri": @uri spliced in.
  76  */
  77 void migrate_qmp(QTestState *who, const char *uri, const char *fmt, ...)
  78 {
  79     va_list ap;
  80     QDict *args;
  81
  82     va_start(ap, fmt);
  83     args = qdict_from_vjsonf_nofail(fmt, ap);
  84     va_end(ap);
  85
  86     g_assert(!qdict_haskey(args, "uri"));
  87     qdict_put_str(args, "uri", uri);
  88
  89     qtest_qmp_assert_success(who,
  90                              "{ 'execute': 'migrate', 'arguments': %p}", args);
  91 }
  92
  93 void migrate_set_capability(QTestState *who, const char *capability,
  94                             bool value)
  95 {
  96     qtest_qmp_assert_success(who,
  97                              "{ 'execute': 'migrate-set-capabilities',"
  98                              "'arguments': { "
  99                              "'capabilities': [ { "
 100                              "'capability': %s, 'state': %i } ] } }",
 101                              capability, value);
 102 }
 103
 104 void migrate_incoming_qmp(QTestState *to, const char *uri, const char *fmt, ...)
 105 {
 106     va_list ap;
 107     QDict *args, *rsp, *data;
 108
 109     va_start(ap, fmt);
 110     args = qdict_from_vjsonf_nofail(fmt, ap);
 111     va_end(ap);
 112
 113     g_assert(!qdict_haskey(args, "uri"));
 114     qdict_put_str(args, "uri", uri);
 115
 116     migrate_set_capability(to, "events", true);
 117
 118     rsp = qtest_qmp(to, "{ 'execute': 'migrate-incoming', 'arguments': %p}",
 119                     args);
 120     g_assert(qdict_haskey(rsp, "return"));
 121     qobject_unref(rsp);
 122
 123     rsp = qtest_qmp_eventwait_ref(to, "MIGRATION");
 124     g_assert(qdict_haskey(rsp, "data"));
 125
 126     data = qdict_get_qdict(rsp, "data");
 127     g_assert(qdict_haskey(data, "status"));
 128     g_assert_cmpstr(qdict_get_str(data, "status"), ==, "setup");
 129
 130     qobject_unref(rsp);
 131 }
 132
 133 /*
 134  * Note: caller is responsible to free the returned object via
 135  * qobject_unref() after use
 136  */
 137 QDict *migrate_query(QTestState *who)
 138 {
 139     return qtest_qmp_assert_success_ref(who, "{ 'execute': 'query-migrate' }");
 140 }
 141
 142 QDict *migrate_query_not_failed(QTestState *who)
 143 {
 144     const char *status;
 145     QDict *rsp = migrate_query(who);
 146     status = qdict_get_str(rsp, "status");
 147     if (g_str_equal(status, "failed")) {
 148         g_printerr("query-migrate shows failed migration: %s\n",
 149                    qdict_get_str(rsp, "error-desc"));
 150     }
 151     g_assert(!g_str_equal(status, "failed"));
 152     return rsp;
 153 }
 154
 155 /*
 156  * Note: caller is responsible to free the returned object via
 157  * g_free() after use
 158  */
 159 static gchar *migrate_query_status(QTestState *who)
 160 {
 161     QDict *rsp_return = migrate_query(who);
 162     gchar *status = g_strdup(qdict_get_str(rsp_return, "status"));
 163
 164     g_assert(status);
 165     qobject_unref(rsp_return);
 166
 167     return status;
 168 }
 169
 170 static bool check_migration_status(QTestState *who, const char *goal,
 171                                    const char **ungoals)
 172 {
 173     bool ready;
 174     char *current_status;
 175     const char **ungoal;
 176
 177     current_status = migrate_query_status(who);
 178     ready = strcmp(current_status, goal) == 0;
 179     if (!ungoals) {
 180         g_assert_cmpstr(current_status, !=, "failed");
 181         /*
 182          * If looking for a state other than completed,
 183          * completion of migration would cause the test to
 184          * hang.
 185          */
 186         if (strcmp(goal, "completed") != 0) {
 187             g_assert_cmpstr(current_status, !=, "completed");
 188         }
 189     } else {
 190         for (ungoal = ungoals; *ungoal; ungoal++) {
 191             g_assert_cmpstr(current_status, !=,  *ungoal);
 192         }
 193     }
 194     g_free(current_status);
 195     return ready;
 196 }
 197
 198 void wait_for_migration_status(QTestState *who,
 199                                const char *goal, const char **ungoals)
 200 {
 201     g_test_timer_start();
 202     while (!check_migration_status(who, goal, ungoals)) {
 203         usleep(1000);
 204
 205         g_assert(g_test_timer_elapsed() < MIGRATION_STATUS_WAIT_TIMEOUT);
 206     }
 207 }
 208
 209 void wait_for_migration_complete(QTestState *who)
 210 {
 211     wait_for_migration_status(who, "completed", NULL);
 212 }
 213
 214 void wait_for_migration_fail(QTestState *from, bool allow_active)
 215 {
 216     g_test_timer_start();
 217     QDict *rsp_return;
 218     char *status;
 219     bool failed;
 220
 221     do {
 222         status = migrate_query_status(from);
 223         bool result = !strcmp(status, "setup") || !strcmp(status, "failed") ||
 224             (allow_active && !strcmp(status, "active"));
 225         if (!result) {
 226             fprintf(stderr, "%s: unexpected status status=%s allow_active=%d\n",
 227                     __func__, status, allow_active);
 228         }
 229         g_assert(result);
 230         failed = !strcmp(status, "failed");
 231         g_free(status);
 232
 233         g_assert(g_test_timer_elapsed() < MIGRATION_STATUS_WAIT_TIMEOUT);
 234     } while (!failed);
 235
 236     /* Is the machine currently running? */
 237     rsp_return = qtest_qmp_assert_success_ref(from,
 238                                               "{ 'execute': 'query-status' }");
 239     g_assert(qdict_haskey(rsp_return, "running"));
 240     g_assert(qdict_get_bool(rsp_return, "running"));
 241     qobject_unref(rsp_return);
 242 }