diff options
Diffstat (limited to 'tools/testing/selftests/drivers/net/lib/py/env.py')
| -rw-r--r-- | tools/testing/selftests/drivers/net/lib/py/env.py | 224 |
1 files changed, 224 insertions, 0 deletions
diff --git a/tools/testing/selftests/drivers/net/lib/py/env.py b/tools/testing/selftests/drivers/net/lib/py/env.py new file mode 100644 index 000000000000..edcedd7bffab --- /dev/null +++ b/tools/testing/selftests/drivers/net/lib/py/env.py @@ -0,0 +1,224 @@ +# SPDX-License-Identifier: GPL-2.0 + +import os +from pathlib import Path +from lib.py import KsftSkipEx, KsftXfailEx +from lib.py import cmd, ip +from lib.py import NetNS, NetdevSimDev +from .remote import Remote + + +def _load_env_file(src_path): + env = os.environ.copy() + + src_dir = Path(src_path).parent.resolve() + if not (src_dir / "net.config").exists(): + return env + + with open((src_dir / "net.config").as_posix(), 'r') as fp: + for line in fp.readlines(): + full_file = line + # Strip comments + pos = line.find("#") + if pos >= 0: + line = line[:pos] + line = line.strip() + if not line: + continue + pair = line.split('=', maxsplit=1) + if len(pair) != 2: + raise Exception("Can't parse configuration line:", full_file) + env[pair[0]] = pair[1] + return env + + +class NetDrvEnv: + """ + Class for a single NIC / host env, with no remote end + """ + def __init__(self, src_path, **kwargs): + self._ns = None + + self.env = _load_env_file(src_path) + + if 'NETIF' in self.env: + self.dev = ip("link show dev " + self.env['NETIF'], json=True)[0] + else: + self._ns = NetdevSimDev(**kwargs) + self.dev = self._ns.nsims[0].dev + self.ifindex = self.dev['ifindex'] + + def __enter__(self): + ip(f"link set dev {self.dev['ifname']} up") + + return self + + def __exit__(self, ex_type, ex_value, ex_tb): + """ + __exit__ gets called at the end of a "with" block. + """ + self.__del__() + + def __del__(self): + if self._ns: + self._ns.remove() + self._ns = None + + +class NetDrvEpEnv: + """ + Class for an environment with a local device and "remote endpoint" + which can be used to send traffic in. + + For local testing it creates two network namespaces and a pair + of netdevsim devices. + """ + + # Network prefixes used for local tests + nsim_v4_pfx = "192.0.2." + nsim_v6_pfx = "2001:db8::" + + def __init__(self, src_path, nsim_test=None): + + self.env = _load_env_file(src_path) + + # Things we try to destroy + self.remote = None + # These are for local testing state + self._netns = None + self._ns = None + self._ns_peer = None + + if "NETIF" in self.env: + if nsim_test is True: + raise KsftXfailEx("Test only works on netdevsim") + self._check_env() + + self.dev = ip("link show dev " + self.env['NETIF'], json=True)[0] + + self.v4 = self.env.get("LOCAL_V4") + self.v6 = self.env.get("LOCAL_V6") + self.remote_v4 = self.env.get("REMOTE_V4") + self.remote_v6 = self.env.get("REMOTE_V6") + kind = self.env["REMOTE_TYPE"] + args = self.env["REMOTE_ARGS"] + else: + if nsim_test is False: + raise KsftXfailEx("Test does not work on netdevsim") + + self.create_local() + + self.dev = self._ns.nsims[0].dev + + self.v4 = self.nsim_v4_pfx + "1" + self.v6 = self.nsim_v6_pfx + "1" + self.remote_v4 = self.nsim_v4_pfx + "2" + self.remote_v6 = self.nsim_v6_pfx + "2" + kind = "netns" + args = self._netns.name + + self.remote = Remote(kind, args, src_path) + + self.addr = self.v6 if self.v6 else self.v4 + self.remote_addr = self.remote_v6 if self.remote_v6 else self.remote_v4 + + self.addr_ipver = "6" if self.v6 else "4" + # Bracketed addresses, some commands need IPv6 to be inside [] + self.baddr = f"[{self.v6}]" if self.v6 else self.v4 + self.remote_baddr = f"[{self.remote_v6}]" if self.remote_v6 else self.remote_v4 + + self.ifname = self.dev['ifname'] + self.ifindex = self.dev['ifindex'] + + self._required_cmd = {} + + def create_local(self): + self._netns = NetNS() + self._ns = NetdevSimDev() + self._ns_peer = NetdevSimDev(ns=self._netns) + + with open("/proc/self/ns/net") as nsfd0, \ + open("/var/run/netns/" + self._netns.name) as nsfd1: + ifi0 = self._ns.nsims[0].ifindex + ifi1 = self._ns_peer.nsims[0].ifindex + NetdevSimDev.ctrl_write('link_device', + f'{nsfd0.fileno()}:{ifi0} {nsfd1.fileno()}:{ifi1}') + + ip(f" addr add dev {self._ns.nsims[0].ifname} {self.nsim_v4_pfx}1/24") + ip(f"-6 addr add dev {self._ns.nsims[0].ifname} {self.nsim_v6_pfx}1/64 nodad") + ip(f" link set dev {self._ns.nsims[0].ifname} up") + + ip(f" addr add dev {self._ns_peer.nsims[0].ifname} {self.nsim_v4_pfx}2/24", ns=self._netns) + ip(f"-6 addr add dev {self._ns_peer.nsims[0].ifname} {self.nsim_v6_pfx}2/64 nodad", ns=self._netns) + ip(f" link set dev {self._ns_peer.nsims[0].ifname} up", ns=self._netns) + + def _check_env(self): + vars_needed = [ + ["LOCAL_V4", "LOCAL_V6"], + ["REMOTE_V4", "REMOTE_V6"], + ["REMOTE_TYPE"], + ["REMOTE_ARGS"] + ] + missing = [] + + for choice in vars_needed: + for entry in choice: + if entry in self.env: + break + else: + missing.append(choice) + # Make sure v4 / v6 configs are symmetric + if ("LOCAL_V6" in self.env) != ("REMOTE_V6" in self.env): + missing.append(["LOCAL_V6", "REMOTE_V6"]) + if ("LOCAL_V4" in self.env) != ("REMOTE_V4" in self.env): + missing.append(["LOCAL_V4", "REMOTE_V4"]) + if missing: + raise Exception("Invalid environment, missing configuration:", missing, + "Please see tools/testing/selftests/drivers/net/README.rst") + + def __enter__(self): + return self + + def __exit__(self, ex_type, ex_value, ex_tb): + """ + __exit__ gets called at the end of a "with" block. + """ + self.__del__() + + def __del__(self): + if self._ns: + self._ns.remove() + self._ns = None + if self._ns_peer: + self._ns_peer.remove() + self._ns_peer = None + if self._netns: + del self._netns + self._netns = None + if self.remote: + del self.remote + self.remote = None + + def require_v4(self): + if not self.v4 or not self.remote_v4: + raise KsftSkipEx("Test requires IPv4 connectivity") + + def require_v6(self): + if not self.v6 or not self.remote_v6: + raise KsftSkipEx("Test requires IPv6 connectivity") + + def _require_cmd(self, comm, key, host=None): + cached = self._required_cmd.get(comm, {}) + if cached.get(key) is None: + cached[key] = cmd("command -v -- " + comm, fail=False, + shell=True, host=host).ret == 0 + self._required_cmd[comm] = cached + return cached[key] + + def require_cmd(self, comm, local=True, remote=False): + if local: + if not self._require_cmd(comm, "local"): + raise KsftSkipEx("Test requires command: " + comm) + if remote: + if not self._require_cmd(comm, "remote"): + raise KsftSkipEx("Test requires (remote) command: " + comm) |