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# SPDX-License-Identifier: GPL-2.0
from lib.py import cmd, ethtool, ip
from lib.py import ksft_pr, ksft_eq, KsftSkipEx
from typing import Optional
import re
import time
import json
#The LinkConfig class is implemented to handle the link layer configurations.
#Required minimum ethtool version is 6.10
class LinkConfig:
"""Class for handling the link layer configurations"""
def __init__(self, cfg: object) -> None:
self.cfg = cfg
self.partner_netif = self.get_partner_netif_name()
"""Get the initial link configuration of local interface"""
self.common_link_modes = self.get_common_link_modes()
def get_partner_netif_name(self) -> Optional[str]:
partner_netif = None
try:
if not self.verify_link_up():
return None
"""Get partner interface name"""
partner_json_output = ip("addr show", json=True, host=self.cfg.remote)
for interface in partner_json_output:
for addr in interface.get('addr_info', []):
if addr.get('local') == self.cfg.remote_addr:
partner_netif = interface['ifname']
ksft_pr(f"Partner Interface name: {partner_netif}")
if partner_netif is None:
ksft_pr("Unable to get the partner interface name")
except Exception as e:
print(f"Unexpected error occurred while getting partner interface name: {e}")
self.partner_netif = partner_netif
return partner_netif
def verify_link_up(self) -> bool:
"""Verify whether the local interface link is up"""
with open(f"/sys/class/net/{self.cfg.ifname}/operstate", "r") as fp:
link_state = fp.read().strip()
if link_state == "down":
ksft_pr(f"Link state of interface {self.cfg.ifname} is DOWN")
return False
else:
return True
def reset_interface(self, local: bool = True, remote: bool = True) -> bool:
ksft_pr("Resetting interfaces in local and remote")
if remote:
if self.verify_link_up():
if self.partner_netif is not None:
ifname = self.partner_netif
link_up_cmd = f"ip link set up {ifname}"
link_down_cmd = f"ip link set down {ifname}"
reset_cmd = f"{link_down_cmd} && sleep 5 && {link_up_cmd}"
try:
cmd(reset_cmd, host=self.cfg.remote)
except Exception as e:
ksft_pr(f"Unexpected error occurred while resetting remote: {e}")
else:
ksft_pr("Partner interface not available")
if local:
ifname = self.cfg.ifname
link_up_cmd = f"ip link set up {ifname}"
link_down_cmd = f"ip link set down {ifname}"
reset_cmd = f"{link_down_cmd} && sleep 5 && {link_up_cmd}"
try:
cmd(reset_cmd)
except Exception as e:
ksft_pr(f"Unexpected error occurred while resetting local: {e}")
time.sleep(10)
if self.verify_link_up() and self.get_ethtool_field("link-detected"):
ksft_pr("Local and remote interfaces reset to original state")
return True
else:
ksft_pr("Error occurred after resetting interfaces. Link is DOWN.")
return False
def set_speed_and_duplex(self, speed: str, duplex: str, autoneg: bool = True) -> bool:
"""Set the speed and duplex state for the interface"""
autoneg_state = "on" if autoneg is True else "off"
process = None
try:
process = ethtool(f"--change {self.cfg.ifname} speed {speed} duplex {duplex} autoneg {autoneg_state}")
except Exception as e:
ksft_pr(f"Unexpected error occurred while setting speed/duplex: {e}")
if process is None or process.ret != 0:
return False
else:
ksft_pr(f"Speed: {speed} Mbps, Duplex: {duplex} set for Interface: {self.cfg.ifname}")
return True
def verify_speed_and_duplex(self, expected_speed: str, expected_duplex: str) -> bool:
if not self.verify_link_up():
return False
"""Verifying the speed and duplex state for the interface"""
with open(f"/sys/class/net/{self.cfg.ifname}/speed", "r") as fp:
actual_speed = fp.read().strip()
with open(f"/sys/class/net/{self.cfg.ifname}/duplex", "r") as fp:
actual_duplex = fp.read().strip()
ksft_eq(actual_speed, expected_speed)
ksft_eq(actual_duplex, expected_duplex)
return True
def set_autonegotiation_state(self, state: str, remote: bool = False) -> bool:
common_link_modes = self.common_link_modes
speeds, duplex_modes = self.get_speed_duplex_values(self.common_link_modes)
speed = speeds[0]
duplex = duplex_modes[0]
if not speed or not duplex:
ksft_pr("No speed or duplex modes found")
return False
speed_duplex_cmd = f"speed {speed} duplex {duplex}" if state == "off" else ""
if remote:
if not self.verify_link_up():
return False
"""Set the autonegotiation state for the partner"""
command = f"-s {self.partner_netif} {speed_duplex_cmd} autoneg {state}"
partner_autoneg_change = None
"""Set autonegotiation state for interface in remote pc"""
try:
partner_autoneg_change = ethtool(command, host=self.cfg.remote)
except Exception as e:
ksft_pr(f"Unexpected error occurred while changing auto-neg in remote: {e}")
if partner_autoneg_change is None or partner_autoneg_change.ret != 0:
ksft_pr(f"Not able to set autoneg parameter for interface {self.partner_netif}.")
return False
ksft_pr(f"Autoneg set as {state} for {self.partner_netif}")
else:
"""Set the autonegotiation state for the interface"""
try:
process = ethtool(f"-s {self.cfg.ifname} {speed_duplex_cmd} autoneg {state}")
if process.ret != 0:
ksft_pr(f"Not able to set autoneg parameter for interface {self.cfg.ifname}")
return False
except Exception as e:
ksft_pr(f"Unexpected error occurred while changing auto-neg in local: {e}")
return False
ksft_pr(f"Autoneg set as {state} for {self.cfg.ifname}")
return True
def check_autoneg_supported(self, remote: bool = False) -> bool:
if not remote:
local_autoneg = self.get_ethtool_field("supports-auto-negotiation")
if local_autoneg is None:
ksft_pr(f"Unable to fetch auto-negotiation status for interface {self.cfg.ifname}")
"""Return autoneg status of the local interface"""
return local_autoneg
else:
if not self.verify_link_up():
raise KsftSkipEx("Link is DOWN")
"""Check remote auto-negotiation support status"""
partner_autoneg = False
if self.partner_netif is not None:
partner_autoneg = self.get_ethtool_field("supports-auto-negotiation", remote=True)
if partner_autoneg is None:
ksft_pr(f"Unable to fetch auto-negotiation status for interface {self.partner_netif}")
return partner_autoneg
def get_common_link_modes(self) -> set[str]:
common_link_modes = []
"""Populate common link modes"""
link_modes = self.get_ethtool_field("supported-link-modes")
partner_link_modes = self.get_ethtool_field("link-partner-advertised-link-modes")
if link_modes is None:
raise KsftSkipEx(f"Link modes not available for {self.cfg.ifname}")
if partner_link_modes is None:
raise KsftSkipEx(f"Partner link modes not available for {self.cfg.ifname}")
common_link_modes = set(link_modes) and set(partner_link_modes)
return common_link_modes
def get_speed_duplex_values(self, link_modes: list[str]) -> tuple[list[str], list[str]]:
speed = []
duplex = []
"""Check the link modes"""
for data in link_modes:
parts = data.split('/')
speed_value = re.match(r'\d+', parts[0])
if speed_value:
speed.append(speed_value.group())
else:
ksft_pr(f"No speed value found for interface {self.ifname}")
return None, None
duplex.append(parts[1].lower())
return speed, duplex
def get_ethtool_field(self, field: str, remote: bool = False) -> Optional[str]:
process = None
if not remote:
"""Get the ethtool field value for the local interface"""
try:
process = ethtool(self.cfg.ifname, json=True)
except Exception as e:
ksft_pr("Required minimum ethtool version is 6.10")
ksft_pr(f"Unexpected error occurred while getting ethtool field in local: {e}")
return None
else:
if not self.verify_link_up():
return None
"""Get the ethtool field value for the remote interface"""
self.cfg.require_cmd("ethtool", remote=True)
if self.partner_netif is None:
ksft_pr(f"Partner interface name is unavailable.")
return None
try:
process = ethtool(self.partner_netif, json=True, host=self.cfg.remote)
except Exception as e:
ksft_pr("Required minimum ethtool version is 6.10")
ksft_pr(f"Unexpected error occurred while getting ethtool field in remote: {e}")
return None
json_data = process[0]
"""Check if the field exist in the json data"""
if field not in json_data:
raise KsftSkipEx(f'Field {field} does not exist in the output of interface {json_data["ifname"]}')
return json_data[field]
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