From patchwork Wed Feb 19 16:33:42 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Oksana Vohchana X-Patchwork-Id: 1240882 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (1024-bit key; unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256 header.s=mimecast20190719 header.b=CiBvmbq+; dkim-atps=neutral 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 ozlabs.org (Postfix) with ESMTPS id 48N3pf4dW5z9sRf for ; Thu, 20 Feb 2020 03:59:06 +1100 (AEDT) Received: from localhost ([::1]:56574 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1j4Sgi-0001xc-ID for incoming@patchwork.ozlabs.org; Wed, 19 Feb 2020 11:59:04 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:41186) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1j4SIT-0007Ou-5p for qemu-devel@nongnu.org; Wed, 19 Feb 2020 11:34:02 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1j4SIR-0003TP-TJ for qemu-devel@nongnu.org; Wed, 19 Feb 2020 11:34:01 -0500 Received: from us-smtp-2.mimecast.com ([205.139.110.61]:58135 helo=us-smtp-delivery-1.mimecast.com) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1j4SIR-0003T6-Os for qemu-devel@nongnu.org; Wed, 19 Feb 2020 11:33:59 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1582130039; 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=ycKK3EZ7C0Wdt+5RE3QVwYTEvg2h7ONgXeE2mgOLxJg=; b=CiBvmbq+jpYwAsNHvcUfE5+nJv+RG0wzGA4b70Y3v/865y3MMCJyeqRHFqXOW4LnRDlRwj Eo/DBITy+jwGrFmPIdB8gFN3ROeL/TQ7Zw39FAk2F4z3Ml78eUMO7CFFzr8kc355tbRQii geZgLaxt4MFNUtx0H5aB1C/haRK3A2g= 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-214-uMpzDTJxMjGwzNImdCmXpA-1; Wed, 19 Feb 2020 11:33:53 -0500 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 47953101FC67 for ; Wed, 19 Feb 2020 16:33:52 +0000 (UTC) Received: from kh066.redhat.com (ovpn-205-79.brq.redhat.com [10.40.205.79]) by smtp.corp.redhat.com (Postfix) with ESMTP id 8090560BE1; Wed, 19 Feb 2020 16:33:50 +0000 (UTC) From: Oksana Vohchana To: qemu-devel@nongnu.org Subject: [PATCH 1/3] Adding functions _send_fds and _recv_fds Date: Wed, 19 Feb 2020 18:33:42 +0200 Message-Id: <20200219163344.27651-2-ovoshcha@redhat.com> In-Reply-To: <20200219163344.27651-1-ovoshcha@redhat.com> References: <20200219163344.27651-1-ovoshcha@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-MC-Unique: uMpzDTJxMjGwzNImdCmXpA-1 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 205.139.110.61 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: philmd@redhat.com, ehabkost@redhat.com, wainersm@redhat.com, crosa@redhat.com Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" It provides new possibilities to send or receive data through the Unix domain 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 | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/python/qemu/machine.py b/python/qemu/machine.py index 183d8f3d38..8c5bd64795 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 from . import qmp @@ -155,6 +156,23 @@ class QEMUMachine(object): self._args.append(','.join(options)) return self + def _recv_fds(self, sock, msglen=8192, maxfds=4096): + """ + Function from https://docs.python.org/3/library/socket.html#socket.socket.recvmsg + """ + fds = array.array("i") + msg, ancdata, flags, addr = sock.recvmsg(msglen, socket.CMSG_LEN(maxfds * fds.itemsize)) + for cmsg_level, cmsg_type, cmsg_data in ancdata: + if cmsg_level == socket.SOL_SOCKET and cmsg_type == 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.sendmsg + """ + return sock.sendmsg([msg], [(socket.SOL_SOCKET, socket.SCM_RIGHTS, array.array("i", fds))]) + def send_fd_scm(self, fd=None, file_path=None): """ Send an fd or file_path to socket_scm_helper.