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[eeprom] check if source exists before reading eeprom on Mellanox platform #2323

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Nov 30, 2018
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[eeprom] check if source exists before reading eeprom on Mellanox platform #2323

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22 changes: 21 additions & 1 deletion device/mellanox/x86_64-mlnx_msn2700-r0/plugins/eeprom.py
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Original file line number Diff line number Diff line change
Expand Up @@ -24,12 +24,32 @@
except ImportError, e:
raise ImportError (str(e) + "- required module not found")

SYSLOG_IDENTIFIER = "eeprom.py"
EEPROM_SYMLINK = "/bsp/eeprom/vpd_info"
CACHE_FILE = "/var/cache/sonic/decode-syseeprom/syseeprom_cache"

def log_error(msg):
syslog.openlog(SYSLOG_IDENTIFIER)
syslog.syslog(syslog.LOG_ERR, msg)
syslog.closelog()

class board(eeprom_tlvinfo.TlvInfoDecoder):

_TLV_INFO_MAX_LEN = 256
RETRIES = 5

def __init__(self, name, path, cpld_root, ro):
self.eeprom_path = "/bsp/eeprom/vpd_info"
for attempt in range(self.RETRIES):
if not os.path.islink(EEPROM_SYMLINK):
time.sleep(1)
else:
break

if not (os.path.islink(EEPROM_SYMLINK) or os.isfile(CACHE_FILE)):
log_error("Nowhere to read syseeprom from! No symlink or cache file found")
raise RuntimeError("No syseeprom symlink or cache file found")

self.eeprom_path = EEPROM_SYMLINK
super(board, self).__init__(self.eeprom_path, 0, '', True)

def decode_eeprom(self, e):
Expand Down