From patchwork Wed Oct 4 19:46:10 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: John Snow X-Patchwork-Id: 13409410 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 1A47DE7C4F0 for ; Wed, 4 Oct 2023 19:47:44 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qo7pQ-0004r6-V0; Wed, 04 Oct 2023 15:46:40 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qo7pP-0004qo-DB for qemu-devel@nongnu.org; Wed, 04 Oct 2023 15:46:39 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qo7pC-00059g-4q for qemu-devel@nongnu.org; Wed, 04 Oct 2023 15:46:39 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1696448785; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=EKJk7XVB2DViVMMKfF/Lt/CVsitRtP9avGJrQHTVjGQ=; b=CiTiROXTmhefPyXwTJcF+Z1Wu8w91UXCHH2ap0P+Khyu7K3MqoRcn4bRyCiU/qizi5fUJX XSg8u0nxPGwXpIMzqE52xZHBDp4Q31WvXJdd8G48emR2HPDPeO+9nlzc1e09OqMuyFgE8I 4j7e2BgDAhxq55r8Xtm/ms+lRcAV/8k= Received: from mimecast-mx02.redhat.com (mx-ext.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-246-_yoS9iTfP7-Z29OlqBEk6A-1; Wed, 04 Oct 2023 15:46:22 -0400 X-MC-Unique: _yoS9iTfP7-Z29OlqBEk6A-1 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.rdu2.redhat.com [10.11.54.3]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 8D5F12825E9A; Wed, 4 Oct 2023 19:46:21 +0000 (UTC) Received: from scv.redhat.com (unknown [10.22.16.75]) by smtp.corp.redhat.com (Postfix) with ESMTP id AD4471054FC2; Wed, 4 Oct 2023 19:46:20 +0000 (UTC) From: John Snow To: qemu-devel@nongnu.org Cc: =?utf-8?q?Alex_Benn=C3=A9e?= , =?utf-8?q?C=C3=A9?= =?utf-8?q?dric_Le_Goater?= , Wainer dos Santos Moschetta , Kevin Wolf , Andrew Jeffery , John Snow , =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= , Cleber Rosa , Peter Maydell , qemu-arm@nongnu.org, Joel Stanley , qemu-block@nongnu.org, Beraldo Leal , Vladimir Sementsov-Ogievskiy , Hanna Reitz , "Michael S. Tsirkin" , Vladimir Sementsov-Ogievskiy , Thomas Huth , Eric Blake , Ani Sinha , Eduardo Habkost , Markus Armbruster , =?utf-8?q?Daniel_P_=2E_Berrang=C3=A9?= Subject: [PULL 6/9] python/machine: use socketpair() for qtest connection Date: Wed, 4 Oct 2023 15:46:10 -0400 Message-ID: <20231004194613.2900323-7-jsnow@redhat.com> In-Reply-To: <20231004194613.2900323-1-jsnow@redhat.com> References: <20231004194613.2900323-1-jsnow@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.3 Received-SPF: pass client-ip=170.10.133.124; envelope-from=jsnow@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Like the QMP and console sockets, begin using socketpairs for the qtest connection, too. After this patch, we'll be able to remove the vestigial sock_dir argument, but that cleanup is best done in its own patch. Signed-off-by: John Snow Reviewed-by: Daniel P. Berrangé Message-id: 20230928044943.849073-6-jsnow@redhat.com Signed-off-by: John Snow --- python/qemu/machine/qtest.py | 49 +++++++++++++++++++++++++++++------- 1 file changed, 40 insertions(+), 9 deletions(-) diff --git a/python/qemu/machine/qtest.py b/python/qemu/machine/qtest.py index 1c46138bd0c..8180d3ab017 100644 --- a/python/qemu/machine/qtest.py +++ b/python/qemu/machine/qtest.py @@ -24,6 +24,7 @@ Optional, Sequence, TextIO, + Tuple, ) from qemu.qmp import SocketAddrT @@ -38,23 +39,41 @@ class QEMUQtestProtocol: :param address: QEMU address, can be either a unix socket path (string) or a tuple in the form ( address, port ) for a TCP connection - :param server: server mode, listens on the socket (bool) + :param sock: An existing socket can be provided as an alternative to + an address. One of address or sock must be provided. + :param server: server mode, listens on the socket. Only meaningful + in conjunction with an address and not an existing + socket. + :raise socket.error: on socket connection errors .. note:: No connection is established by __init__(), this is done by the connect() or accept() methods. """ - def __init__(self, address: SocketAddrT, + def __init__(self, + address: Optional[SocketAddrT] = None, + sock: Optional[socket.socket] = None, server: bool = False): + if address is None and sock is None: + raise ValueError("Either 'address' or 'sock' must be specified") + if address is not None and sock is not None: + raise ValueError( + "Either 'address' or 'sock' must be specified, but not both") + if sock is not None and server: + raise ValueError("server=True is meaningless when passing socket") + self._address = address - self._sock = self._get_sock() + self._sock = sock or self._get_sock() self._sockfile: Optional[TextIO] = None + if server: + assert self._address is not None self._sock.bind(self._address) self._sock.listen(1) def _get_sock(self) -> socket.socket: + assert self._address is not None if isinstance(self._address, tuple): family = socket.AF_INET else: @@ -67,7 +86,8 @@ def connect(self) -> None: @raise socket.error on socket connection errors """ - self._sock.connect(self._address) + if self._address is not None: + self._sock.connect(self._address) self._sockfile = self._sock.makefile(mode='r') def accept(self) -> None: @@ -127,29 +147,40 @@ def __init__(self, base_temp_dir=base_temp_dir, sock_dir=sock_dir, qmp_timer=qmp_timer) self._qtest: Optional[QEMUQtestProtocol] = None - self._qtest_path = os.path.join(sock_dir, name + "-qtest.sock") + self._qtest_sock_pair: Optional[ + Tuple[socket.socket, socket.socket]] = None @property def _base_args(self) -> List[str]: args = super()._base_args + assert self._qtest_sock_pair is not None + fd = self._qtest_sock_pair[0].fileno() args.extend([ - '-qtest', f"unix:path={self._qtest_path}", + '-chardev', f"socket,id=qtest,fd={fd}", + '-qtest', 'chardev:qtest', '-accel', 'qtest' ]) return args def _pre_launch(self) -> None: + self._qtest_sock_pair = socket.socketpair() + os.set_inheritable(self._qtest_sock_pair[0].fileno(), True) super()._pre_launch() - self._qtest = QEMUQtestProtocol(self._qtest_path, server=True) + self._qtest = QEMUQtestProtocol(sock=self._qtest_sock_pair[1]) def _post_launch(self) -> None: assert self._qtest is not None super()._post_launch() - self._qtest.accept() + if self._qtest_sock_pair: + self._qtest_sock_pair[0].close() + self._qtest.connect() def _post_shutdown(self) -> None: + if self._qtest_sock_pair: + self._qtest_sock_pair[0].close() + self._qtest_sock_pair[1].close() + self._qtest_sock_pair = None super()._post_shutdown() - self._remove_if_exists(self._qtest_path) def qtest(self, cmd: str) -> str: """