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https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2026-07-23 03:57:32 -04:00
32229484e3
Introduce a new test, `ipv4_devconf_notify`, to verify that the kernel sends the appropriate netlink notifications when IPv4 devconf parameters are modified. The test depends on the newly introduced iproute2 command: `ip link set dev <ifname> inet` Signed-off-by: Fernando Fernandez Mancera <fmancera@suse.de> Link: https://patch.msgid.link/20260609204520.4670-3-fmancera@suse.de Signed-off-by: Jakub Kicinski <kuba@kernel.org>
64 lines
2.4 KiB
Python
Executable File
64 lines
2.4 KiB
Python
Executable File
#!/usr/bin/env python3
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# SPDX-License-Identifier: GPL-2.0
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import socket
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import time
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from lib.py import bkg, ip, ksft_exit, ksft_run, ksft_ge, ksft_true, KsftSkipEx
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from lib.py import CmdExitFailure, NetNS, NetNSEnter, RtnlAddrFamily
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IPV4_ALL_HOSTS_MULTICAST = b'\xe0\x00\x00\x01'
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def dump_mcaddr_check() -> None:
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"""
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Verify that at least one interface has the IPv4 all-hosts multicast address.
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At least the loopback interface should have this address.
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"""
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rtnl = RtnlAddrFamily()
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addresses = rtnl.getmulticast({"ifa-family": socket.AF_INET}, dump=True)
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all_host_multicasts = [
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addr for addr in addresses if addr['multicast'] == IPV4_ALL_HOSTS_MULTICAST
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]
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ksft_ge(len(all_host_multicasts), 1,
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"No interface found with the IPv4 all-hosts multicast address")
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def ipv4_devconf_notify() -> None:
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"""
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Configure an interface and set ipv4-devconf values through netlink
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to verify that the appropriate netlink notifications are being sent.
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"""
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with NetNS() as ns:
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with NetNSEnter(str(ns)):
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ifname = "dummy1"
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ip(f"link add name {ifname} type dummy", ns=str(ns))
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with bkg("ip monitor", ns=str(ns)) as cmd_obj:
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time.sleep(1)
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try:
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ip(f"link set dev {ifname} inet forwarding on")
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ip(f"link set dev {ifname} inet proxy_arp on")
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ip(f"link set dev {ifname} inet rp_filter 1")
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ip(f"link set dev {ifname} inet ignore_routes_with_linkdown on")
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except CmdExitFailure:
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raise KsftSkipEx("iproute2 does not support IPv4 devconf attributes")
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time.sleep(1)
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ksft_true(f"inet {ifname} ignore_routes_with_linkdown on" in cmd_obj.stdout,
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f"No 'ignore_routes_with_linkdown on' notificiation found for interface {ifname}")
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ksft_true(f"inet {ifname} rp_filter strict" in cmd_obj.stdout,
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f"No 'rp_filter strict' notificiation found for interface {ifname}")
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ksft_true(f"inet {ifname} proxy_neigh on" in cmd_obj.stdout,
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f"No 'proxy_neigh on' notificiation found for interface {ifname}")
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ksft_true(f"inet {ifname} forwarding on" in cmd_obj.stdout,
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f"No 'forwarding on' notificiation found for interface {ifname}")
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def main() -> None:
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ksft_run([dump_mcaddr_check, ipv4_devconf_notify])
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ksft_exit()
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if __name__ == "__main__":
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main()
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