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Coding style fixes in loader to meet PEP 8 criteria

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Change str.format() to formatted string literals.
It should be a little faster and easier to read.

Signed-off-by: Slawomir Jankowski <slawomir.jankowski@intel.com>
This commit is contained in:
Slawomir Jankowski 2020-12-07 16:37:14 +01:00 committed by Robert Baldyga
parent 068d90bbea
commit d7e0bad5a4
2 changed files with 76 additions and 80 deletions
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12
utils/open-cas-loader
View File

@ -5,7 +5,6 @@
#
import subprocess
import time
import opencas
import sys
import os
@ -21,8 +20,7 @@ try:
config = opencas.cas_config.from_file('/etc/opencas/opencas.conf',
allow_incomplete=True)
except Exception as e:
sl.syslog(sl.LOG_ERR,
'Unable to load opencas config. Reason: {0}'.format(str(e)))
sl.syslog(sl.LOG_ERR, 'Unable to load opencas config. Reason: {str(e)}')
exit(1)
for cache in config.caches.values():
@ -32,8 +30,8 @@ for cache in config.caches.values():
opencas.start_cache(cache, True)
except opencas.casadm.CasadmError as e:
sl.syslog(sl.LOG_WARNING,
'Unable to load cache {0} ({1}). Reason: {2}'
.format(cache.cache_id, cache.device, e.result.stderr))
f'Unable to load cache {cache.cache_id} ({cache.device}). '
f'Reason: {e.result.stderr}')
exit(e.result.exit_code)
exit(0)
for core in cache.cores.values():
@ -43,7 +41,7 @@ for cache in config.caches.values():
opencas.add_core(core, True)
except opencas.casadm.CasadmError as e:
sl.syslog(sl.LOG_WARNING,
'Unable to attach core {0} from cache {1}. Reason: {2}'
.format(core.device, cache.cache_id, e.result.stderr))
f'Unable to attach core {core.device} from cache {cache.cache_id}. '
f'Reason: {e.result.stderr}')
exit(e.result.exit_code)
exit(0)

78
utils/opencas.py
View File

@ -192,10 +192,10 @@ class cas_config(object):
try:
mode = os.stat(path).st_mode
except:
raise ValueError('{0} not found'.format(path))
raise ValueError(f'{path} not found')
if not stat.S_ISBLK(mode):
raise ValueError('{0} is not block device'.format(path))
raise ValueError(f'{path} is not block device')
class cache_config(object):
def __init__(self, cache_id, device, cache_mode, **params):
@ -255,12 +255,12 @@ class cas_config(object):
elif param_name == "lazy_startup":
self.check_lazy_startup_valid(param_value)
else:
raise ValueError('{0} is invalid parameter name'.format(param_name))
raise ValueError(f'{param_name} is invalid parameter name')
@staticmethod
def check_cache_id_valid(cache_id):
if not 1 <= int(cache_id) <= 16384:
raise ValueError('{0} is invalid cache id'.format(cache_id))
raise ValueError(f'{cache_id} is invalid cache id')
def check_cache_device_empty(self):
try:
@ -273,17 +273,16 @@ class cas_config(object):
if len(list(filter(lambda a: a != '', result.stdout.split('\n')))) > 1:
raise ValueError(
'Partitions found on device {0}. Use force option to ignore'.
format(self.device))
'Partitions found on device {self.device}. Use force option to ignore'
)
def check_cache_mode_valid(self, cache_mode):
if cache_mode.lower() not in ['wt', 'pt', 'wa', 'wb', 'wo']:
raise ValueError('Invalid cache mode {0}'.format(cache_mode))
raise ValueError(f'Invalid cache mode {cache_mode}')
def check_cleaning_policy_valid(self, cleaning_policy):
if cleaning_policy.lower() not in ['acp', 'alru', 'nop']:
raise ValueError('{0} is invalid cleaning policy name'.format(
cleaning_policy))
raise ValueError(f'{cleaning_policy} is invalid cleaning policy name')
def check_lazy_startup_valid(self, lazy_startup):
if lazy_startup.lower() not in ["true", "false"]:
@ -291,13 +290,11 @@ class cas_config(object):
def check_promotion_policy_valid(self, promotion_policy):
if promotion_policy.lower() not in ['always', 'nhit']:
raise ValueError('{0} is invalid promotion policy name'.format(
promotion_policy))
raise ValueError(f'{promotion_policy} is invalid promotion policy name')
def check_cache_line_size_valid(self, cache_line_size):
if cache_line_size not in ['4', '8', '16', '32', '64']:
raise ValueError('{0} is invalid cache line size'.format(
cache_line_size))
raise ValueError(f'{cache_line_size} is invalid cache line size')
def check_recursive(self):
if not self.device.startswith('/dev/cas'):
@ -310,7 +307,7 @@ class cas_config(object):
raise ValueError('Recursive configuration detected')
def to_line(self):
ret = '{0}\t{1}\t{2}'.format(self.cache_id, self.device, self.cache_mode)
ret = f'{self.cache_id}\t{self.device}\t{self.cache_mode}'
if len(self.params) > 0:
i = 0
for param, value in self.params.items():
@ -319,7 +316,7 @@ class cas_config(object):
else:
ret += '\t'
ret += '{0}={1}'.format(param, value)
ret += f'{param}={value}'
i += 1
ret += '\n'
@ -378,16 +375,14 @@ class cas_config(object):
if param_name == "lazy_startup":
if param_value.lower() not in ["true", "false"]:
raise ValueError(
"{} is invalid value for '{}' core param".format(
param_value, param_name
)
f"{param_value} is invalid value for '{param_name}' core param"
)
else:
raise ValueError("'{}' is invalid core param name".format(param_name))
raise ValueError(f"'{param_name}' is invalid core param name")
def check_core_id_valid(self):
if not 0 <= int(self.core_id) <= 4095:
raise ValueError('{0} is invalid core id'.format(self.core_id))
raise ValueError(f'{self.core_id} is invalid core id')
def check_recursive(self):
if not self.device.startswith('/dev/cas'):
@ -400,11 +395,11 @@ class cas_config(object):
raise ValueError('Recursive configuration detected')
def to_line(self):
ret = "{0}\t{1}\t{2}".format(self.cache_id, self.core_id, self.device)
ret = f"{self.cache_id}\t{self.core_id}\t{self.device}"
for i, (param, value) in enumerate(self.params.items()):
ret += "," if i > 0 else "\t"
ret += "{0}={1}".format(param, value)
ret += f"{param}={value}"
ret += "\n"
return ret
@ -493,7 +488,7 @@ class cas_config(object):
def insert_core(self, new_core_config):
if new_core_config.cache_id not in self.caches:
raise KeyError('Cache id {0} doesn\'t exist'.format(new_core_config.cache_id))
raise KeyError(f'Cache id {new_core_config.cache_id} doesn\'t exist')
try:
for cache_id, cache in self.caches.items():
@ -537,7 +532,7 @@ class cas_config(object):
def write(self, config_file):
try:
with open(config_file, 'w') as conf:
conf.write('{0}\n'.format(self.version_tag))
conf.write(f'{self.version_tag}\n')
conf.write('# This config was automatically generated\n')
conf.write('[caches]\n')
@ -547,7 +542,6 @@ class cas_config(object):
conf.write('\n[cores]\n')
for core in self.cores:
conf.write(core.to_line())
except:
raise Exception('Couldn\'t write config file')
@ -563,6 +557,7 @@ def start_cache(cache, load, force=False):
load=load,
force=force)
def configure_cache(cache):
if "cleaning_policy" in cache.params:
casadm.set_param(
@ -587,6 +582,7 @@ def add_core(core, attach):
# Another helper functions
def is_cache_started(cache_config):
dev_list = get_caches_list()
for dev in dev_list:
@ -595,6 +591,7 @@ def is_cache_started(cache_config):
return False
def is_core_added(core_config):
dev_list = get_caches_list()
cache_id = 0
@ -609,14 +606,17 @@ def is_core_added(core_config):
return False
def get_caches_list():
result = casadm.list_caches()
return list(csv.DictReader(result.stdout.split('\n')))
def check_cache_device(device):
result = casadm.check_cache_device(device)
return list(csv.DictReader(result.stdout.split('\n')))[0]
def get_cas_version():
version = casadm.get_version()
@ -640,7 +640,7 @@ class CompoundException(Exception):
s = "Multiple exceptions occured:\n" if len(self.exception_list) > 1 else ""
for e in self.exception_list:
s += '{0}\n'.format(str(e))
s += f'{str(e)}\n'
return s
@ -659,6 +659,7 @@ class CompoundException(Exception):
else:
raise self
def detach_core_recursive(cache_id, core_id, flush):
# Catching exceptions is left to uppermost caller of detach_core_recursive
# as the immediate caller that made a recursive call depends on the callee
@ -668,21 +669,21 @@ def detach_core_recursive(cache_id, core_id, flush):
if dev['type'] == 'cache':
l_cache_id = dev['id']
elif dev['type'] == 'core' and dev['status'] == 'Active':
if '/dev/cas{0}-{1}'.format(cache_id, core_id) in dev['disk']:
if f'/dev/cas{cache_id}-{core_id}' in dev['disk']:
detach_core_recursive(l_cache_id, dev['id'], flush)
elif l_cache_id == cache_id and dev['id'] == core_id and dev['status'] != 'Active':
return
casadm.remove_core(cache_id, core_id, detach=True, force=not flush)
def detach_all_cores(flush):
error = CompoundException()
try:
dev_list = get_caches_list()
except casadm.CasadmError as e:
raise Exception('Unable to list caches. Reason:\n{0}'.format(
e.result.stderr))
raise Exception(f'Unable to list caches. Reason:\n{e.result.stderr}')
except:
raise Exception('Unable to list caches.')
@ -696,22 +697,20 @@ def detach_all_cores(flush):
detach_core_recursive(cache_id, dev['id'], flush)
except casadm.CasadmError as e:
error.add_exception(Exception(
'Unable to detach core {0}. Reason:\n{1}'.format(
dev['disk'], e.result.stderr)))
f"Unable to detach core {dev['disk']}. Reason:\n{e.result.stderr}"))
except:
error.add_exception(Exception(
'Unable to detach core {0}.'.format(dev['disk'])))
error.add_exception(Exception(f"Unable to detach core {dev['disk']}."))
error.raise_nonempty()
def stop_all_caches(flush):
error = CompoundException()
try:
dev_list = get_caches_list()
except casadm.CasadmError as e:
raise Exception('Unable to list caches. Reason:\n{0}'.format(
e.result.stderr))
raise Exception(f'Unable to list caches. Reason:\n{e.result.stderr}')
except:
raise Exception('Unable to list caches.')
@ -723,14 +722,13 @@ def stop_all_caches(flush):
casadm.stop_cache(dev['id'], not flush)
except casadm.CasadmError as e:
error.add_exception(Exception(
'Unable to stop cache {0}. Reason:\n{1}'.format(
dev['disk'], e.result.stderr)))
f"Unable to stop cache {dev['disk']}. Reason:\n{e.result.stderr}"))
except:
error.add_exception(Exception(
'Unable to stop cache {0}.'.format(dev['disk'])))
error.add_exception(Exception(f"Unable to stop cache {dev['disk']}."))
error.raise_nonempty()
def stop(flush):
error = CompoundException()
@ -837,7 +835,7 @@ def wait_for_startup(timeout=300, interval=5):
cas_config.default_location, allow_incomplete=True
)
except Exception as e:
raise Exception("Unable to load opencas config. Reason: {0}".format(str(e)))
raise Exception(f"Unable to load opencas config. Reason: {str(e)}")
not_initialized = _get_uninitialized_devices(config)
if not not_initialized: