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 4A110C11D05 for ; Thu, 20 Feb 2020 15:13:08 +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 1A66F208CD for ; Thu, 20 Feb 2020 15:13:08 +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="dNAOU9kN" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1A66F208CD 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]:44078 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1j4nVj-000609-8w for qemu-devel@archiver.kernel.org; Thu, 20 Feb 2020 10:13:07 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:46605) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1j4nTc-0002jD-0Z for qemu-devel@nongnu.org; Thu, 20 Feb 2020 10:10:57 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1j4nTa-0006qA-PR for qemu-devel@nongnu.org; Thu, 20 Feb 2020 10:10:55 -0500 Received: from us-smtp-delivery-1.mimecast.com ([207.211.31.120]:41957 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 1j4nTa-0006nV-La for qemu-devel@nongnu.org; Thu, 20 Feb 2020 10:10:54 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1582211453; 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=yMcsuqrYa1e/c6WIxi9XC5EJlGhyeHPg8JOTNTCllQ8=; b=dNAOU9kNtnXOIG6zeHm63Xv8XC3s6N1Jt+EvBReH3JeK5qyKF89Eb8HI0XWVXG7E921iyI c5e77c0wI5ft951TulYVQYwH9YQEkAaMpBKjZ7Blj4tijuB/0BfS28OtfjmUNQ/Ipi0BEt +ioGXqS8bsSWm5g5ZKE8nwTrppcaZc4= 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-97-ns8n_V4hOvmoE9yMw6s2hA-1; Thu, 20 Feb 2020 10:10:48 -0500 X-MC-Unique: ns8n_V4hOvmoE9yMw6s2hA-1 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 08D8B1937FC9 for ; Thu, 20 Feb 2020 15:10:47 +0000 (UTC) Received: from kh066.redhat.com (ovpn-204-205.brq.redhat.com [10.40.204.205]) by smtp.corp.redhat.com (Postfix) with ESMTP id 602C38ED1E; Thu, 20 Feb 2020 15:10:45 +0000 (UTC) From: Oksana Vohchana To: qemu-devel@nongnu.org Subject: [PATCH v2 1/3] Adding functions _send_fds and _recv_fds Date: Thu, 20 Feb 2020 17:10:37 +0200 Message-Id: <20200220151039.20552-2-ovoshcha@redhat.com> In-Reply-To: <20200220151039.20552-1-ovoshcha@redhat.com> References: <20200220151039.20552-1-ovoshcha@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 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] [fuzzy] X-Received-From: 207.211.31.120 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" It provides new possibilities to send or receive data through the Unix doma= in socket file descriptor. This is useful for obtaining a socket that belongs to a different network namespace. Signed-off-by: Oksana Vohchana --- python/qemu/machine.py | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/python/qemu/machine.py b/python/qemu/machine.py index 183d8f3d38..976316e5f5 100644 --- a/python/qemu/machine.py +++ b/python/qemu/machine.py @@ -24,6 +24,7 @@ import subprocess import shutil import socket import tempfile +import array =20 from . import qmp =20 @@ -155,6 +156,29 @@ class QEMUMachine(object): self._args.append(','.join(options)) return self =20 + def _recv_fds(self, sock, msglen=3D8192, maxfds=3D4096): + """ + Function from: + https://docs.python.org/3/library/socket.html#socket.socket.recvms= g + """ + fds =3D array.array("i") + msg, ancdata, flags, addr =3D sock.recvmsg(msglen, socket.CMSG_LEN= ( + maxfds * fds.itemsize)) + for cmsg_level, cmsg_type, cmsg_data in ancdata: + if (cmsg_level =3D=3D socket.SOL_SOCKET and + cmsg_type =3D=3D socket.SCM_RIGHTS): + fds.frombytes(cmsg_data[:len(cmsg_data) - (len(cmsg_data) + % fds.itemsize)]) + return msg, list(fds) + + def _send_fds(self, sock, msg, fds): + """ + Function from: + https://docs.python.org/3/library/socket.html#socket.socket.sendms= g + """ + return sock.sendmsg([msg], [(socket.SOL_SOCKET, socket.SCM_RIGHTS, + array.array("i", fds))]) + def send_fd_scm(self, fd=3DNone, file_path=3DNone): """ Send an fd or file_path to socket_scm_helper. --=20 2.21.1