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[Mellanox]Remove the dependency on sysfs for sfputil (#2967)

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* [sfputil]Remove the dependency on sysfs for sfputil, mainly get_presence and port_to_eeprom_mapping
Remove the dependency on sysfs, including:
1. rewrite get_presence by using ethtool;
2. remove interface port_to_eeprom_mapping which is no longer referenced;
3. remove code that references port_to_eeprom_mapping and _port_to_eeprom_mapping;
4. remove private member qsfp_sysfs_path which is no longer referenced.

* [sfputil.py]
minor adjustment: move the presence=False to the beginning of get_presence.
This commit is contained in:
Stephen 2019-06-07 21:21:03 +08:00 committed by lguohan
parent d84aa49d38
commit bf2c9cd099
1 changed files with 19 additions and 19 deletions
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38
device/mellanox/x86_64-mlnx_msn2700-r0/plugins/sfputil.py
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@ -37,15 +37,12 @@ class SfpUtil(SfpUtilBase):
PORTS_IN_BLOCK = 0
EEPROM_OFFSET = 0
_port_to_eeprom_mapping = {}
db_sel = None
db_sel_timeout = None
db_sel_object = None
db_sel_tbl = None
state_db = None
sfpd_status_tbl = None
qsfp_sysfs_path = "/var/run/hw-management/qsfp/"
@property
def port_start(self):
@ -61,7 +58,8 @@ class SfpUtil(SfpUtilBase):
@property
def port_to_eeprom_mapping(self):
return self._port_to_eeprom_mapping
print "dependency on sysfs has been removed"
raise Exception()
def get_port_position_tuple_by_sku_name(self):
p = subprocess.Popen(GET_HWSKU_CMD, shell=True, stdout=subprocess.PIPE)
@ -77,29 +75,31 @@ class SfpUtil(SfpUtilBase):
self.PORTS_IN_BLOCK = port_position_tuple[3]
self.EEPROM_OFFSET = port_position_tuple[4]
for x in range(0, self.port_end + 1):
self._port_to_eeprom_mapping[x] = self.qsfp_sysfs_path + "qsfp{}".format(x + self.EEPROM_OFFSET)
SfpUtilBase.__init__(self)
def get_presence(self, port_num):
presence = False
# Check for invalid port_num
if port_num < self.port_start or port_num > self.port_end:
return False
return presence
port_num += SFP_PORT_NAME_OFFSET
sfpname = SFP_PORT_NAME_CONVENTION.format(port_num)
ethtool_cmd = "ethtool -m {} 2>/dev/null".format(sfpname)
try:
reg_file = open(self.qsfp_sysfs_path + "qsfp{}_status".format(port_num + 1))
except IOError as e:
print "Error: unable to open file: %s" % str(e)
return False
proc = subprocess.Popen(ethtool_cmd, stdout=subprocess.PIPE, shell=True, stderr=subprocess.STDOUT)
stdout = proc.communicate()[0]
proc.wait()
result = stdout.rstrip('\n')
if result != '':
presence = True
content = reg_file.readline().rstrip()
except OSError, e:
return presence
# content is a string with the qsfp status
if content == SFP_STATUS_INSERTED:
return True
return False
return presence
def get_low_power_mode(self, port_num):
# Check for invalid port_num
@ -405,7 +405,7 @@ class SfpUtil(SfpUtilBase):
def get_transceiver_dom_info_dict(self, port_num):
transceiver_dom_info_dict = {}
# Below part is added to avoid fail xcvrd
# Below part is added to avoid failing xcvrd
# Currently, the way in which dom data is read has been changed from
# using sysfs to using ethtool.
# The ethtool returns None for ports without dom support, resulting in