[v2,3/4] tests: Add parameter to qtest_init_without_qmp_handshake

Allow callers to choose whether to allow OOB support during a test;
for now, all existing callers pass false, but the next patch will
add a new caller.  Also, rewrite the monitor setup to be generic
(using the -qmp shorthand is insufficient for honoring the parameter).

Based on an idea by Peter Xu, in <20180326063901.27425-8-peterx@redhat.com>

Signed-off-by: Eric Blake <eblake@redhat.com>
---
 tests/libqtest.h |  7 +++++--
 tests/libqtest.c | 10 ++++++----
 tests/qmp-test.c |  2 +-
 3 files changed, 12 insertions(+), 7 deletions(-)

On Tue, Mar 27, 2018 at 3:36 AM, Eric Blake <eblake@redhat.com> wrote:
> Allow callers to choose whether to allow OOB support during a test;
> for now, all existing callers pass false, but the next patch will
> add a new caller.  Also, rewrite the monitor setup to be generic
> (using the -qmp shorthand is insufficient for honoring the parameter).
>
> Based on an idea by Peter Xu, in <20180326063901.27425-8-peterx@redhat.com>
>
> Signed-off-by: Eric Blake <eblake@redhat.com>

Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>


> ---
>  tests/libqtest.h |  7 +++++--
>  tests/libqtest.c | 10 ++++++----
>  tests/qmp-test.c |  2 +-
>  3 files changed, 12 insertions(+), 7 deletions(-)
>
> diff --git a/tests/libqtest.h b/tests/libqtest.h
> index 811169453ab..cbe8df44730 100644
> --- a/tests/libqtest.h
> +++ b/tests/libqtest.h
> @@ -56,11 +56,14 @@ QTestState *qtest_init(const char *extra_args);
>
>  /**
>   * qtest_init_without_qmp_handshake:
> - * @extra_args: other arguments to pass to QEMU.
> + * @use_oob: true to have the server advertise OOB support
> + * @extra_args: other arguments to pass to QEMU.  CAUTION: these
> + * arguments are subject to word splitting and shell evaluation.
>   *
>   * Returns: #QTestState instance.
>   */
> -QTestState *qtest_init_without_qmp_handshake(const char *extra_args);
> +QTestState *qtest_init_without_qmp_handshake(bool use_oob,
> +                                             const char *extra_args);
>
>  /**
>   * qtest_quit:
> diff --git a/tests/libqtest.c b/tests/libqtest.c
> index 200b2b9e92a..6f33a37667c 100644
> --- a/tests/libqtest.c
> +++ b/tests/libqtest.c
> @@ -166,7 +166,8 @@ static const char *qtest_qemu_binary(void)
>      return qemu_bin;
>  }
>
> -QTestState *qtest_init_without_qmp_handshake(const char *extra_args)
> +QTestState *qtest_init_without_qmp_handshake(bool use_oob,
> +                                             const char *extra_args)
>  {
>      QTestState *s;
>      int sock, qmpsock, i;
> @@ -199,12 +200,13 @@ QTestState *qtest_init_without_qmp_handshake(const char *extra_args)
>          command = g_strdup_printf("exec %s "
>                                    "-qtest unix:%s,nowait "
>                                    "-qtest-log %s "
> -                                  "-qmp unix:%s,nowait "
> +                                  "-chardev socket,path=%s,nowait,id=char0 "
> +                                  "-mon chardev=char0,mode=control%s "
>                                    "-machine accel=qtest "
>                                    "-display none "
>                                    "%s", qemu_binary, socket_path,
>                                    getenv("QTEST_LOG") ? "/dev/fd/2" : "/dev/null",
> -                                  qmp_socket_path,
> +                                  qmp_socket_path, use_oob ? ",x-oob=on" : "",
>                                    extra_args ?: "");
>          execlp("/bin/sh", "sh", "-c", command, NULL);
>          exit(1);
> @@ -239,7 +241,7 @@ QTestState *qtest_init_without_qmp_handshake(const char *extra_args)
>
>  QTestState *qtest_init(const char *extra_args)
>  {
> -    QTestState *s = qtest_init_without_qmp_handshake(extra_args);
> +    QTestState *s = qtest_init_without_qmp_handshake(false, extra_args);
>
>      /* Read the QMP greeting and then do the handshake */
>      qtest_qmp_discard_response(s, "");
> diff --git a/tests/qmp-test.c b/tests/qmp-test.c
> index 8de99a4727e..2134d95db97 100644
> --- a/tests/qmp-test.c
> +++ b/tests/qmp-test.c
> @@ -81,7 +81,7 @@ static void test_qmp_protocol(void)
>      QList *capabilities;
>      QTestState *qts;
>
> -    qts = qtest_init_without_qmp_handshake(common_args);
> +    qts = qtest_init_without_qmp_handshake(false, common_args);
>
>      /* Test greeting */
>      resp = qtest_qmp_receive(qts);
> --
> 2.14.3
>