forked from mirrors/linux
selftests: net: Add test cases for link and peer netns
- Add test for creating link in another netns when a link of the same name and ifindex exists in current netns. - Add test to verify that link is created in target netns directly - no link new/del events should be generated in link netns or current netns. - Add test cases to verify that link-netns is set as expected for various drivers and combination of namespace-related parameters. Signed-off-by: Xiao Liang <shaw.leon@gmail.com> Link: https://patch.msgid.link/20250219125039.18024-14-shaw.leon@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Xiao Liang
Jakub Kicinski
parent
0303294162
commit
85cb3711ac
4 changed files with 157 additions and 0 deletions
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@ -36,6 +36,7 @@ TEST_PROGS += cmsg_so_priority.sh
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TEST_PROGS += test_so_rcv.sh
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TEST_PROGS += cmsg_time.sh cmsg_ipv6.sh
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TEST_PROGS += netns-name.sh
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TEST_PROGS += link_netns.py
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TEST_PROGS += nl_netdev.py
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TEST_PROGS += rtnetlink.py
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TEST_PROGS += srv6_end_dt46_l3vpn_test.sh
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@ -107,3 +107,8 @@ CONFIG_XFRM_INTERFACE=m
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CONFIG_XFRM_USER=m
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CONFIG_IP_NF_MATCH_RPFILTER=m
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CONFIG_IP6_NF_MATCH_RPFILTER=m
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CONFIG_IPVLAN=m
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CONFIG_CAN=m
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CONFIG_CAN_DEV=m
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CONFIG_CAN_VXCAN=m
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CONFIG_NETKIT=y
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141
tools/testing/selftests/net/link_netns.py
Executable file
141
tools/testing/selftests/net/link_netns.py
Executable file
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@ -0,0 +1,141 @@
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#!/usr/bin/env python3
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# SPDX-License-Identifier: GPL-2.0
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import time
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from lib.py import ksft_run, ksft_exit, ksft_true
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from lib.py import ip
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from lib.py import NetNS, NetNSEnter
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from lib.py import RtnlFamily
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LINK_NETNSID = 100
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def test_event() -> None:
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with NetNS() as ns1, NetNS() as ns2:
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with NetNSEnter(str(ns2)):
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rtnl = RtnlFamily()
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rtnl.ntf_subscribe("rtnlgrp-link")
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ip(f"netns set {ns2} {LINK_NETNSID}", ns=str(ns1))
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ip(f"link add netns {ns1} link-netnsid {LINK_NETNSID} dummy1 type dummy")
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ip(f"link add netns {ns1} dummy2 type dummy", ns=str(ns2))
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ip("link del dummy1", ns=str(ns1))
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ip("link del dummy2", ns=str(ns1))
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time.sleep(1)
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rtnl.check_ntf()
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ksft_true(rtnl.async_msg_queue.empty(),
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"Received unexpected link notification")
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def validate_link_netns(netns, ifname, link_netnsid) -> bool:
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link_info = ip(f"-d link show dev {ifname}", ns=netns, json=True)
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if not link_info:
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return False
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return link_info[0].get("link_netnsid") == link_netnsid
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def test_link_net() -> None:
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configs = [
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# type, common args, type args, fallback to dev_net
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("ipvlan", "link dummy1", "", False),
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("macsec", "link dummy1", "", False),
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("macvlan", "link dummy1", "", False),
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("macvtap", "link dummy1", "", False),
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("vlan", "link dummy1", "id 100", False),
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("gre", "", "local 192.0.2.1", True),
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("vti", "", "local 192.0.2.1", True),
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("ipip", "", "local 192.0.2.1", True),
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("ip6gre", "", "local 2001:db8::1", True),
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("ip6tnl", "", "local 2001:db8::1", True),
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("vti6", "", "local 2001:db8::1", True),
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("sit", "", "local 192.0.2.1", True),
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("xfrm", "", "if_id 1", True),
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]
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with NetNS() as ns1, NetNS() as ns2, NetNS() as ns3:
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net1, net2, net3 = str(ns1), str(ns2), str(ns3)
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# prepare link netnsid and a dummy link needed by certain drivers
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ip(f"netns set {net3} {LINK_NETNSID}", ns=str(net2))
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ip("link add dummy1 type dummy", ns=net3)
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cases = [
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# source, "netns", "link-netns", expected link-netns
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(net3, None, None, None, None),
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(net3, net2, None, None, LINK_NETNSID),
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(net2, None, net3, LINK_NETNSID, LINK_NETNSID),
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(net1, net2, net3, LINK_NETNSID, LINK_NETNSID),
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]
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for src_net, netns, link_netns, exp1, exp2 in cases:
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tgt_net = netns or src_net
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for typ, cargs, targs, fb_dev_net in configs:
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cmd = "link add"
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if netns:
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cmd += f" netns {netns}"
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if link_netns:
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cmd += f" link-netns {link_netns}"
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cmd += f" {cargs} foo type {typ} {targs}"
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ip(cmd, ns=src_net)
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if fb_dev_net:
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ksft_true(validate_link_netns(tgt_net, "foo", exp1),
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f"{typ} link_netns validation failed")
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else:
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ksft_true(validate_link_netns(tgt_net, "foo", exp2),
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f"{typ} link_netns validation failed")
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ip(f"link del foo", ns=tgt_net)
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def test_peer_net() -> None:
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types = [
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"vxcan",
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"netkit",
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"veth",
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]
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with NetNS() as ns1, NetNS() as ns2, NetNS() as ns3, NetNS() as ns4:
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net1, net2, net3, net4 = str(ns1), str(ns2), str(ns3), str(ns4)
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ip(f"netns set {net3} {LINK_NETNSID}", ns=str(net2))
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cases = [
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# source, "netns", "link-netns", "peer netns", expected
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(net1, None, None, None, None),
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(net1, net2, None, None, None),
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(net2, None, net3, None, LINK_NETNSID),
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(net1, net2, net3, None, None),
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(net2, None, None, net3, LINK_NETNSID),
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(net1, net2, None, net3, LINK_NETNSID),
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(net2, None, net2, net3, LINK_NETNSID),
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(net1, net2, net4, net3, LINK_NETNSID),
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]
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for src_net, netns, link_netns, peer_netns, exp in cases:
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tgt_net = netns or src_net
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for typ in types:
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cmd = "link add"
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if netns:
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cmd += f" netns {netns}"
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if link_netns:
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cmd += f" link-netns {link_netns}"
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cmd += f" foo type {typ}"
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if peer_netns:
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cmd += f" peer netns {peer_netns}"
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ip(cmd, ns=src_net)
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ksft_true(validate_link_netns(tgt_net, "foo", exp),
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f"{typ} peer_netns validation failed")
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ip(f"link del foo", ns=tgt_net)
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def main() -> None:
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ksft_run([test_event, test_link_net, test_peer_net])
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ksft_exit()
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if __name__ == "__main__":
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main()
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@ -78,6 +78,16 @@ ip -netns $NS link show dev $ALT_NAME 2> /dev/null &&
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fail "Can still find alt-name after move"
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ip -netns $test_ns link del $DEV || fail
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#
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# Test no conflict of the same name/ifindex in different netns
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#
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ip -netns $NS link add name $DEV index 100 type dummy || fail
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ip -netns $NS link add netns $test_ns name $DEV index 100 type dummy ||
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fail "Can create in netns without moving"
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ip -netns $test_ns link show dev $DEV >> /dev/null || fail "Device not found"
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ip -netns $NS link del $DEV || fail
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ip -netns $test_ns link del $DEV || fail
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echo -ne "$(basename $0) \t\t\t\t"
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if [ $RET_CODE -eq 0 ]; then
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echo "[ OK ]"
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