Re: [Qemu-devel] [PATCH v2 04/10] tests: Don't abuse global_qtest

["Dr. David Alan Gilbert" <dgilbert@redhat.com>]

* Juan Quintela (quintela@redhat.com) wrote:
> As we have two guests running, just pass always who we want to send a
> message to.  Once there, refactor return_or_event() into wait_command.
> 
> Signed-off-by: Juan Quintela <quintela@redhat.com>

Hmm was there anything else anywhere that relied on global_qtest?
Hopefully not.


Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>

> ---
>  tests/migration-test.c | 55 +++++++++++++++++++++++++-------------------------
>  1 file changed, 27 insertions(+), 28 deletions(-)
> 
> diff --git a/tests/migration-test.c b/tests/migration-test.c
> index 91fb0277d6..c429a13403 100644
> --- a/tests/migration-test.c
> +++ b/tests/migration-test.c
> @@ -223,20 +223,23 @@ static void wait_for_serial(const char *side)
>  /*
>   * Events can get in the way of responses we are actually waiting for.
>   */
> -static QDict *return_or_event(QDict *response)
> +static QDict *wait_command(QTestState *who, const char *command)
>  {
>      const char *event_string;
> -    if (!qdict_haskey(response, "event")) {
> -        return response;
> -    }
> +    QDict *response;
> +
> +    response = qtest_qmp(who, command);
>  
> -    /* OK, it was an event */
> -    event_string = qdict_get_str(response, "event");
> -    if (!strcmp(event_string, "STOP")) {
> -        got_stop = true;
> +    while (qdict_haskey(response, "event")) {
> +        /* OK, it was an event */
> +        event_string = qdict_get_str(response, "event");
> +        if (!strcmp(event_string, "STOP")) {
> +            got_stop = true;
> +        }
> +        QDECREF(response);
> +        response = qtest_qmp_receive(who);
>      }
> -    QDECREF(response);
> -    return return_or_event(qtest_qmp_receive(global_qtest));
> +    return response;
>  }
>  
>  
> @@ -245,12 +248,12 @@ static QDict *return_or_event(QDict *response)
>   * events suddenly appearing confuse the qmp()/hmp() responses.
>   */
>  
> -static uint64_t get_migration_pass(void)
> +static uint64_t get_migration_pass(QTestState *who)
>  {
>      QDict *rsp, *rsp_return, *rsp_ram;
>      uint64_t result;
>  
> -    rsp = return_or_event(qmp("{ 'execute': 'query-migrate' }"));
> +    rsp = wait_command(who, "{ 'execute': 'query-migrate' }");
>      rsp_return = qdict_get_qdict(rsp, "return");
>      if (!qdict_haskey(rsp_return, "ram")) {
>          /* Still in setup */
> @@ -263,7 +266,7 @@ static uint64_t get_migration_pass(void)
>      return result;
>  }
>  
> -static void wait_for_migration_complete(void)
> +static void wait_for_migration_complete(QTestState *who)
>  {
>      QDict *rsp, *rsp_return;
>      bool completed;
> @@ -271,7 +274,7 @@ static void wait_for_migration_complete(void)
>      do {
>          const char *status;
>  
> -        rsp = return_or_event(qmp("{ 'execute': 'query-migrate' }"));
> +        rsp = wait_command(who, "{ 'execute': 'query-migrate' }");
>          rsp_return = qdict_get_qdict(rsp, "return");
>          status = qdict_get_str(rsp_return, "status");
>          completed = strcmp(status, "completed") == 0;
> @@ -281,14 +284,14 @@ static void wait_for_migration_complete(void)
>      } while (!completed);
>  }
>  
> -static void wait_for_migration_pass(void)
> +static void wait_for_migration_pass(QTestState *who)
>  {
> -    uint64_t initial_pass = get_migration_pass();
> +    uint64_t initial_pass = get_migration_pass(who);
>      uint64_t pass;
>  
>      /* Wait for the 1st sync */
>      do {
> -        initial_pass = get_migration_pass();
> +        initial_pass = get_migration_pass(who);
>          if (got_stop || initial_pass) {
>              break;
>          }
> @@ -297,7 +300,7 @@ static void wait_for_migration_pass(void)
>  
>      do {
>          usleep(1000 * 100);
> -        pass = get_migration_pass();
> +        pass = get_migration_pass(who);
>      } while (pass == initial_pass && !got_stop);
>  }
>  
> @@ -493,7 +496,7 @@ static void test_migrate_end(QTestState *from, QTestState *to)
>  static void test_migrate(void)
>  {
>      char *uri = g_strdup_printf("unix:%s/migsocket", tmpfs);
> -    QTestState *global = global_qtest, *from, *to;
> +    QTestState *from, *to;
>      QDict *rsp;
>  
>      test_migrate_start(&from, &to, uri);
> @@ -513,26 +516,22 @@ static void test_migrate(void)
>  
>      migrate(from, uri);
>  
> -    global_qtest = from;
> -    wait_for_migration_pass();
> +    wait_for_migration_pass(from);
>  
> -    rsp = return_or_event(qmp("{ 'execute': 'migrate-start-postcopy' }"));
> +    rsp = wait_command(from, "{ 'execute': 'migrate-start-postcopy' }");
>      g_assert(qdict_haskey(rsp, "return"));
>      QDECREF(rsp);
>  
>      if (!got_stop) {
> -        qmp_eventwait("STOP");
> +        qtest_qmp_eventwait(from, "STOP");
>      }
>  
> -    global_qtest = to;
> -    qmp_eventwait("RESUME");
> +    qtest_qmp_eventwait(to, "RESUME");
>  
>      wait_for_serial("dest_serial");
> -    global_qtest = from;
> -    wait_for_migration_complete();
> +    wait_for_migration_complete(from);
>  
>      g_free(uri);
> -    global_qtest = global;
>  
>      test_migrate_end(from, to);
>  }
> -- 
> 2.13.6
> 
--
Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK