From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.6 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id CDC1EC4BA10 for ; Wed, 26 Feb 2020 11:58:53 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 9DAA924684 for ; Wed, 26 Feb 2020 11:58:53 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="Rg6fMg6r" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9DAA924684 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:43200 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1j6vL2-0000kp-N4 for qemu-devel@archiver.kernel.org; Wed, 26 Feb 2020 06:58:52 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:39266) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1j6vK4-0007mc-OM for qemu-devel@nongnu.org; Wed, 26 Feb 2020 06:57:53 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1j6vK3-0000LY-Dj for qemu-devel@nongnu.org; Wed, 26 Feb 2020 06:57:52 -0500 Received: from us-smtp-delivery-1.mimecast.com ([205.139.110.120]:44868 helo=us-smtp-1.mimecast.com) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1j6vK3-0000L2-9x for qemu-devel@nongnu.org; Wed, 26 Feb 2020 06:57:51 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1582718270; 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=cZZZFtNgFSqSUAScMorUibiLokP5MDGEpCKyOnxM8iM=; b=Rg6fMg6rlDSYbQMX9ms6BGONACs66JMmA1fT/XmnSnVtYWD3l0MAFh97NqEdLFfi22S8se 1Z1mY6IVWUgVOTVEhmDux8/2IKMUOK4nbDRsG014GMCUIzoMIF8JNFJl1/uz048Ht187Lg Un/m4Dth7wJ7ipv//132yYhut0wnVPw= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-290-Klkcf9kkPBGIU3rnYdZYNA-1; Wed, 26 Feb 2020 06:57:45 -0500 X-MC-Unique: Klkcf9kkPBGIU3rnYdZYNA-1 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id AD81B107ACCA for ; Wed, 26 Feb 2020 11:57:44 +0000 (UTC) Received: from kh066.redhat.com (ovpn-117-106.ams2.redhat.com [10.36.117.106]) by smtp.corp.redhat.com (Postfix) with ESMTP id 09B765C102; Wed, 26 Feb 2020 11:57:42 +0000 (UTC) From: Oksana Vohchana To: qemu-devel@nongnu.org Subject: [PATCH v3 2/3] python/qemu/machine: Updates send_fd_scm function Date: Wed, 26 Feb 2020 13:57:34 +0200 Message-Id: <20200226115735.857-3-ovoshcha@redhat.com> In-Reply-To: <20200226115735.857-1-ovoshcha@redhat.com> References: <20200226115735.857-1-ovoshcha@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 205.139.110.120 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: ovoshcha@redhat.com, philmd@redhat.com, ehabkost@redhat.com, wainersm@redhat.com, crosa@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" This patch upgrades the send_fd_scm function to use it in way if not provid= e socket_scm_helper. It uses new provided functions _send_fds and _recv_fds = that depend on FD's and data that allow us to send a file/socket descriptor (with access and permissions) from one process to another. The parameter data include qmp message like getfd or add-fd. Signed-off-by: Oksana Vohchana --- python/qemu/machine.py | 64 ++++++++++++++++++++++++++---------------- 1 file changed, 40 insertions(+), 24 deletions(-) diff --git a/python/qemu/machine.py b/python/qemu/machine.py index 976316e5f5..906ca118db 100644 --- a/python/qemu/machine.py +++ b/python/qemu/machine.py @@ -179,20 +179,27 @@ class QEMUMachine(object): return sock.sendmsg([msg], [(socket.SOL_SOCKET, socket.SCM_RIGHTS, array.array("i", fds))]) =20 - def send_fd_scm(self, fd=3DNone, file_path=3DNone): + def send_fd_scm(self, fd=3DNone, file_path=3DNone, data=3DNone): """ - Send an fd or file_path to socket_scm_helper. + Can be used in two different cases. + Send an fd or file_path to socket_scm_helper or + provide data and fd to send it to the socket. =20 - Exactly one of fd and file_path must be given. - If it is file_path, the helper will open that file and pass its ow= n fd. + Exactly one of fd and file_path must be given to the case of + socket_scm_helper. If it is file_path, the helper will open that f= ile + and pass its own fd. + + To second case need adds data that include a QMP request and fd """ # In iotest.py, the qmp should always use unix socket. assert self._qmp.is_scm_available() - if self._socket_scm_helper is None: - raise QEMUMachineError("No path to socket_scm_helper set") - if not os.path.exists(self._socket_scm_helper): - raise QEMUMachineError("%s does not exist" % - self._socket_scm_helper) + if data is None: + if self._socket_scm_helper is None: + raise QEMUMachineError( + "No path to socket_scm_helper set or data provided") + if not os.path.exists(self._socket_scm_helper): + raise QEMUMachineError("%s does not exist" % + self._socket_scm_helper) =20 # This did not exist before 3.4, but since then it is # mandatory for our purpose @@ -201,24 +208,33 @@ class QEMUMachine(object): if fd is not None: os.set_inheritable(fd, True) =20 - fd_param =3D ["%s" % self._socket_scm_helper, - "%d" % self._qmp.get_sock_fd()] + if data is None: + fd_param =3D ["%s" % self._socket_scm_helper, + "%d" % self._qmp.get_sock_fd()] + if file_path is not None: + assert fd is None + fd_param.append(file_path) + else: + assert fd is not None + fd_param.append(str(fd)) =20 - if file_path is not None: - assert fd is None - fd_param.append(file_path) - else: - assert fd is not None - fd_param.append(str(fd)) + devnull =3D open(os.path.devnull, 'rb') + proc =3D subprocess.Popen(fd_param, stdin=3Ddevnull, + stdout=3Dsubprocess.PIPE, + stderr=3Dsubprocess.STDOUT, close_fds= =3DFalse) + output =3D proc.communicate()[0] + if output: + LOG.debug(output) =20 - devnull =3D open(os.path.devnull, 'rb') - proc =3D subprocess.Popen(fd_param, stdin=3Ddevnull, stdout=3Dsubp= rocess.PIPE, - stderr=3Dsubprocess.STDOUT, close_fds=3DFa= lse) - output =3D proc.communicate()[0] - if output: - LOG.debug(output) + return proc.returncode =20 - return proc.returncode + else: + sock_fd =3D socket.fromfd(self._qmp.get_sock_fd(), socket.AF_U= NIX, + socket.SOCK_STREAM) + fds_param =3D [fd, self._qmp.get_sock_fd()] + self._send_fds(sock_fd, data, fds_param) + self._recv_fds(sock_fd) + return self =20 @staticmethod def _remove_if_exists(path): --=20 2.21.1