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[Mellanox] enhance the reboot cause handling on 201811 #3253

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merged 3 commits into from
Aug 2, 2019
Merged

[Mellanox] enhance the reboot cause handling on 201811 #3253

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45b5dcb
[Mellanox/mlnx-platform-api] enable mellanox's platform-api to be loa…
Aug 1, 2019
2862d07
[chassis] update reboot-cause handling code to adapt the hw-managemen…
Aug 1, 2019
7da76c2
[chassis]handle the case that reboot cause file can be any dir matchi…
Aug 2, 2019
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2 changes: 2 additions & 0 deletions platform/mellanox/mlnx-platform-api/sonic_platform/__init__.py
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Original file line number Diff line number Diff line change
@@ -0,0 +1,2 @@
__all__ = ["platform", "chassis"]
from sonic_platform import *
28 changes: 26 additions & 2 deletions platform/mellanox/mlnx-platform-api/sonic_platform/chassis.py
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Original file line number Diff line number Diff line change
Expand Up @@ -13,17 +13,22 @@
try:
from sonic_platform_base.chassis_base import ChassisBase
from os.path import join
from glob import glob
import os
import io
import re
import subprocess
import syslog
except ImportError as e:
raise ImportError (str(e) + "- required module not found")

# The default dir for reboot cause files
HWMGMT_SYSTEM_ROOT = '/var/run/hw-management/system/'
# The hwmon root dir used in case of the hw-mgmt v1.x.x is used.
HWMON_ROOT_PATTERN = '/sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*'

#reboot cause related definitions
REBOOT_CAUSE_ROOT = HWMGMT_SYSTEM_ROOT
REBOOT_CAUSE_ROOT = None

REBOOT_CAUSE_POWER_LOSS_FILE = 'reset_main_pwr_fail'
REBOOT_CAUSE_AUX_POWER_LOSS_FILE = 'reset_aux_pwr_or_ref'
Expand All @@ -37,18 +42,37 @@

# ========================== Syslog wrappers ==========================
SYSLOG_IDENTIFIER = "mlnx-chassis"
def log_warning(msg, also_print_to_console=False):
def log_warning(msg):
syslog.openlog(SYSLOG_IDENTIFIER)
syslog.syslog(syslog.LOG_WARNING, msg)
syslog.closelog()

def log_info(msg):
syslog.openlog(SYSLOG_IDENTIFIER)
syslog.syslog(syslog.LOG_INFO, msg)
syslog.closelog()

class Chassis(ChassisBase):
"""Platform-specific Chassis class"""

def __init__(self):
global REBOOT_CAUSE_ROOT
super(Chassis, self).__init__()

# adaptively reboot cause root dir initialization
REBOOT_CAUSE_ROOT = HWMGMT_SYSTEM_ROOT
if not os.path.exists(REBOOT_CAUSE_ROOT):
log_warning("reboot cause dir {} doesn't exist, trying other alternatives".format(REBOOT_CAUSE_ROOT))
possible_reboot_cause_dir_list = glob(HWMON_ROOT_PATTERN)
if possible_reboot_cause_dir_list is None or len(possible_reboot_cause_dir_list) == 0:
log_warning("can't find reboot cause files in {}".format(HWMON_ROOT_PATTERN))
else:
REBOOT_CAUSE_ROOT = possible_reboot_cause_dir_list[0]
if len(possible_reboot_cause_dir_list) > 1:
log_warning("found multiple reboot cause dir {}, pick the first one".format(possible_reboot_cause_dir_list))
else:
log_info("pick {} as reboot cause file".format(REBOOT_CAUSE_ROOT))

def _read_generic_file(self, filename, len):
"""
Read a generic file, returns the contents of the file
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