From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from gandalf.ozlabs.org (mail.ozlabs.org [IPv6:2404:9400:2221:ea00::3]) by passt.top (Postfix) with ESMTPS id 1C4E95A027D for ; Wed, 31 May 2023 03:59:05 +0200 (CEST) Received: by gandalf.ozlabs.org (Postfix, from userid 1007) id 4QWC9S4Mdtz4x5Z; Wed, 31 May 2023 11:58:52 +1000 (AEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gibson.dropbear.id.au; s=201602; t=1685498332; bh=CssvCoTQV2xdZrwqJzGZNQrGWZ4G6LAXMJqc2X43pNE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=cLbhgIpRlLb7YxYrESTAmLZRiKFcLsGhJNxNEF+w+WcloQ8OX7kiOHp0h+Vg97B7U IBj9TOvMvArytGkz3FLuBekT/b9Hs2FnDbUyJqM3IaD9IYeXgvbdu6Dq/FZWkRnDbB 6UOEtWKe597KWK1SmRxvdZmAcb9utVbBw1/EKit0= From: David Gibson To: passt-dev@passt.top, Stefano Brivio Subject: [PATCH v3 19/20] avocado/tasst: Helpers to construct a simple network environment for tests Date: Wed, 31 May 2023 11:58:48 +1000 Message-Id: <20230531015849.3229596-20-david@gibson.dropbear.id.au> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230531015849.3229596-1-david@gibson.dropbear.id.au> References: <20230531015849.3229596-1-david@gibson.dropbear.id.au> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Message-ID-Hash: VCF2JK26ACSV3KSBN4EGNILZUABH477A X-Message-ID-Hash: VCF2JK26ACSV3KSBN4EGNILZUABH477A X-MailFrom: dgibson@gandalf.ozlabs.org X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header CC: Cleber Rosa , jarichte@redhat.com, David Gibson X-Mailman-Version: 3.3.8 Precedence: list List-Id: Development discussion and patches for passt Archived-At: Archived-At: List-Archive: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: This constructs essentially the simplest sensible network for passt/pasta to operate in. We have one netns "simhost" to represent the host where we will run passt or pasta, and a second "gw" to represent its default gateway. Signed-off-by: David Gibson --- avocado/tasst/scenario/__init__.py | 11 ++++ avocado/tasst/scenario/simple.py | 98 ++++++++++++++++++++++++++++++ 2 files changed, 109 insertions(+) create mode 100644 avocado/tasst/scenario/__init__.py create mode 100644 avocado/tasst/scenario/simple.py diff --git a/avocado/tasst/scenario/__init__.py b/avocado/tasst/scenario/__init__.py new file mode 100644 index 0000000..8ca64a6 --- /dev/null +++ b/avocado/tasst/scenario/__init__.py @@ -0,0 +1,11 @@ +#! /usr/bin/python3 + +# SPDX-License-Identifier: GPL-2.0-or-later +# +# tasst - Test A Simple Socket Transport +# library of test helpers for passt & pasta +# +# tasst/scenario - Helpers to set up various sample network topologies +# +# Copyright Red Hat +# Author: David Gibson diff --git a/avocado/tasst/scenario/simple.py b/avocado/tasst/scenario/simple.py new file mode 100644 index 0000000..272d959 --- /dev/null +++ b/avocado/tasst/scenario/simple.py @@ -0,0 +1,98 @@ +#! /usr/bin/python3 + +# SPDX-License-Identifier: GPL-2.0-or-later +# +# tasst - Test A Simple Socket Transport +# library of test helpers for passt & pasta +# +# tasst/scenario/simple - Smallest sensible network to use passt/pasta +# +# Copyright Red Hat +# Author: David Gibson + +import contextlib + +from tasst import Tasst +from tasst.nstool import UnshareSite +from tasst.address import IpiAllocator, TEST_NET_2, TEST_NET6_TASST_B +from tasst.site import Site +from tasst.transfer import MetaTcpUploadTasst, MetaUdpTransferTasst, TransferTasstInfo +from tasst.typing import typecheck + + +class __SimpleNet: + """A simple network setup scenario + + The sample network has 2 sites (network namespaces) connected with + a veth link: + [simhost] <-veth-> [gw] + + gw is set up as the default router for simhost. + + simhost has addresses: + self.ip4 (IPv4), self.ip6 (IPv6), self.ip6_ll (IPv6 link local) + + gw has addresses: + self.gw_ip4 (IPv4), self.gw_ip6 (IPv6), self.gw_ip6_ll (IPv6 link local) + self.remote_ip4 (IPv4), self.remote_ip6 (IPv6) + + The "remote" addresses are on a different subnet from the others, + so the only way for simhost to reach them is via its default + route. This helps to exercise that we're actually using that, + rather than just local net routes. + + """ + + def __init__(self, hostsite, gwsite): + self.simhost = typecheck(hostsite, Site) + self.gw = typecheck(gwsite, Site) + + self.ifname = 'veth' + self.gw_ifname = 'gw' + self.ifname + self.simhost.veth(self.ifname, self.gw_ifname, self.gw) + + ipa_local = IpiAllocator() + self.ip4, self.ip6 = ipa_local.next_ipis() + self.gw_ip4, self.gw_ip6 = ipa_local.next_ipis() + + ipa_remote = IpiAllocator(TEST_NET_2, TEST_NET6_TASST_B) + self.remote_ip4, self.remote_ip6 = ipa_remote.next_ipis() + + self.gw.ifup('lo') + self.gw.ifup(self.gw_ifname, self.gw_ip4, self.gw_ip6, + self.remote_ip4, self.remote_ip6) + + self.simhost.ifup('lo') + self.simhost.ifup(self.ifname, self.ip4, self.ip6) + + # Once link is up on both sides, SLAAC will run + self.gw_ip6_ll = self.gw.addr_wait(self.gw_ifname, family='inet6', scope='link')[0] + self.ip6_ll = self.simhost.addr_wait(self.ifname, family='inet6', scope='link')[0] + + # Set up the default route + self.simhost.fg('ip -4 route add default via {}'.format(self.gw_ip4.ip), sudo=True) + self.simhost.fg('ip -6 route add default via {} dev {}' + .format(self.gw_ip6_ll.ip, self.ifname), sudo=True) + +@contextlib.contextmanager +def simple_net(name): + name = typecheck(name, str) + with UnshareSite(name + '.simhost', '-Ucnpf --mount-proc') as simhost, \ + UnshareSite(name + '.gw', '-n', parent=simhost, sudo=True) as gw: + yield __SimpleNet(simhost, gw) + + +class SimpleNetConnectivityTasst(MetaTcpUploadTasst, MetaUdpTransferTasst): + """ + Check connectivity between the simulated host and the gateway, + before involving passt/pasta. + + :avocado: tags=meta + + """ + + @contextlib.contextmanager + def setup_transfer(self): + with simple_net(type(self).__name__) as simnet: + yield TransferTasstInfo('test/small.bin', simnet.simhost, simnet.gw, + simnet.remote_ip4.ip, simnet.remote_ip6.ip, 10000) -- 2.40.1