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[ecn] Add tests for ecnconfig command (sonic-net#1372)
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- What I did
Added unit tests for ecnconfig command
Updated 'show ecn' command to use run_command wrapper
Updated 'config ecn' command to allow configuration of drop probabilities
Cleanup trailing spaces in ecnconfig script and add hooks to support unit tests

- How to verify it
Ran the new ecn_test.py and it passed

Signed-off-by: Neetha John <nejo@microsoft.com>
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@neethajohn
neethajohn committed Jan 21, 2021
1 parent 23e0920 commit b082684
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Showing 8 changed files with 295 additions and 21 deletions.
8 changes: 7 additions & 1 deletion config/main.py
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Original file line number Diff line number Diff line change
Expand Up @@ -3533,8 +3533,11 @@ def remove_reasons(counter_name, reasons, verbose):
@click.option('-ymin', metavar='<yellow threshold min>', type=int, help="Set yellow min threshold")
@click.option('-gmax', metavar='<green threshold max>', type=int, help="Set green max threshold")
@click.option('-gmin', metavar='<green threshold min>', type=int, help="Set green min threshold")
@click.option('-rdrop', metavar='<red drop probability>', type=click.IntRange(0, 100), help="Set red drop probability")
@click.option('-ydrop', metavar='<yellow drop probability>', type=click.IntRange(0, 100), help="Set yellow drop probability")
@click.option('-gdrop', metavar='<green drop probability>', type=click.IntRange(0, 100), help="Set green drop probability")
@click.option('-v', '--verbose', is_flag=True, help="Enable verbose output")
def ecn(profile, rmax, rmin, ymax, ymin, gmax, gmin, verbose):
def ecn(profile, rmax, rmin, ymax, ymin, gmax, gmin, rdrop, ydrop, gdrop, verbose):
"""ECN-related configuration tasks"""
log.log_info("'ecn -profile {}' executing...".format(profile))
command = "ecnconfig -p %s" % profile
Expand All @@ -3544,6 +3547,9 @@ def ecn(profile, rmax, rmin, ymax, ymin, gmax, gmin, verbose):
if ymin is not None: command += " -ymin %d" % ymin
if gmax is not None: command += " -gmax %d" % gmax
if gmin is not None: command += " -gmin %d" % gmin
if rdrop is not None: command += " -rdrop %d" % rdrop
if ydrop is not None: command += " -ydrop %d" % ydrop
if gdrop is not None: command += " -gdrop %d" % gdrop
if verbose: command += " -vv"
clicommon.run_command(command, display_cmd=verbose)

Expand Down
66 changes: 51 additions & 15 deletions scripts/ecnconfig
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Original file line number Diff line number Diff line change
Expand Up @@ -48,12 +48,25 @@ ECN status:
queue 3: on
"""
import argparse
import json
import os
import sys

import swsssdk
from tabulate import tabulate

# mock the redis for unit test purposes #
try:
if os.environ["UTILITIES_UNIT_TESTING"] == "2":
modules_path = os.path.join(os.path.dirname(__file__), "..")
tests_path = os.path.join(modules_path, "tests")
sys.path.insert(0, modules_path)
sys.path.insert(0, tests_path)
import mock_tables.dbconnector

except KeyError:
pass

WRED_PROFILE_TABLE_NAME = "WRED_PROFILE"
WRED_CONFIG_FIELDS = {
"gmax": "green_max_threshold",
Expand All @@ -78,11 +91,12 @@ lossless_queues = ['3', '4']

class EcnConfig(object):
"""
Process aclstat
Process ecnconfig
"""
def __init__(self, verbose):
def __init__(self, filename, verbose):
self.ports = []
self.queues = []
self.filename = filename
self.verbose = verbose

# Set up db connections
Expand All @@ -109,8 +123,8 @@ class EcnConfig(object):

for profile_name, profile_data in wred_profiles.items():
if profile_name == profile:
return profile_data
return profile_data

return None

def validate_profile_data(self, profile_data):
Expand All @@ -125,17 +139,17 @@ class EcnConfig(object):
if 'threshold' in field:
if value.isdigit() == False:
print("Invalid %s (%s). %s should be an non-negative integer." % (key, value, key))
result = False
result = False

elif 'probability' in field:
if value.isdigit() == False or int(value) < 0 or int(value) > 100:
print("Invalid %s (%s). %s should be an integer between 0 and 100." % (key, value, key))
result = False

if result == False:
return result
return result

# check if min threshold is no larger than max threshold
# check if min threshold is no larger than max threshold
colors = ['g', 'y', 'r']
for color in colors:
if (WRED_CONFIG_FIELDS[color + 'min'] in profile_data and
Expand All @@ -145,11 +159,11 @@ class EcnConfig(object):
max_thresh = int(profile_data[WRED_CONFIG_FIELDS[color + 'max']])

if min_thresh > max_thresh:
print("Invalid %s (%d) and %s (%d). %s should be no smaller than %s" %
print("Invalid %s (%d) and %s (%d). %s should be smaller than %s" %
(color + 'min', min_thresh, color + 'max', max_thresh, color + 'min', color + 'max'))
result = False
result = False

return result
return result

def set_wred_threshold(self, profile, threshold, value):
if os.geteuid() != 0:
Expand All @@ -159,15 +173,23 @@ class EcnConfig(object):
if self.verbose:
print("Setting %s value to %s" % (field, value))
self.db.mod_entry(WRED_PROFILE_TABLE_NAME, profile, {field: value})
if self.filename is not None:
prof_table = self.db.get_table(WRED_PROFILE_TABLE_NAME)
with open(self.filename, "w") as fd:
json.dump(prof_table, fd)

def set_wred_prob(self, profile, drop_color, value):
if os.geteuid() != 0:
sys.exit("Root privileges required for this operation")

field = WRED_CONFIG_FIELDS[drop_color]
if self.verbose:
print("Setting %s value to %s%%" % (field, value))
self.db.mod_entry(WRED_PROFILE_TABLE_NAME, profile, {field: value})
if self.filename is not None:
prof_table = self.db.get_table(WRED_PROFILE_TABLE_NAME)
with open(self.filename, "w") as fd:
json.dump(prof_table, fd)

class EcnQ(object):
"""
Expand Down Expand Up @@ -253,21 +275,35 @@ def main():

parser.add_argument('command', nargs='?', choices=['on', 'off'], type=str, help='turn on/off ecn', default=None)
parser.add_argument('-q', '--queue', type=str, help='specify queue index list: 3,4', default=None)
parser.add_argument('-f', '--filename', help='file used by mock tests', type=str, default=None)

if os.environ.get("UTILITIES_UNIT_TESTING", "0") == "2":
sys.argv.extend(['-f', '/tmp/ecnconfig'])

args = parser.parse_args()

try:
if args.list or args.profile:
prof_cfg = EcnConfig(args.verbose)
prof_cfg = EcnConfig(args.filename, args.verbose)
if args.list:
if len(sys.argv) > (3 if args.verbose else 2):
arg_len_max = 2
if args.verbose:
arg_len_max += 1
if args.filename:
arg_len_max += 2
if len(sys.argv) > arg_len_max:
raise Exception("Input arguments error. No set options allowed when -l[ist] specified")
prof_cfg.list()
elif args.profile:
if len(sys.argv) < (5 if args.verbose else 4):
arg_len_min = 4
if args.verbose:
arg_len_min += 1
if args.filename:
arg_len_min += 2
if len(sys.argv) < arg_len_min:
raise Exception("Input arguments error. Specify at least one threshold parameter to set")

# get current configuration data
# get current configuration data
wred_profile_data = prof_cfg.get_profile_data(args.profile)
if wred_profile_data is None:
raise Exception("Input arguments error. Invalid WRED profile %s" % (args.profile))
Expand Down
3 changes: 2 additions & 1 deletion setup.py
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Original file line number Diff line number Diff line change
Expand Up @@ -61,7 +61,8 @@
'mock_tables/asic2/*.json',
'filter_fdb_input/*',
'pfcwd_input/*',
'wm_input/*']
'wm_input/*',
'ecn_input/*']
},
scripts=[
'scripts/aclshow',
Expand Down
8 changes: 4 additions & 4 deletions show/main.py
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Original file line number Diff line number Diff line change
Expand Up @@ -15,7 +15,7 @@
from utilities_common.db import Db

from . import acl
from . import bgp_common
from . import bgp_common
from . import chassis_modules
from . import dropcounters
from . import feature
Expand Down Expand Up @@ -1449,11 +1449,11 @@ def policer(policer_name, verbose):
# 'ecn' command ("show ecn")
#
@cli.command('ecn')
def ecn():
@click.option('--verbose', is_flag=True, help="Enable verbose output")
def ecn(verbose):
"""Show ECN configuration"""
cmd = "ecnconfig -l"
proc = subprocess.Popen(cmd, stdout=subprocess.PIPE, shell=True, text=True)
click.echo(proc.stdout.read())
run_command(cmd, display_cmd=verbose)


#
Expand Down
Empty file added tests/ecn_input/__init__.py
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Empty file.
105 changes: 105 additions & 0 deletions tests/ecn_input/ecn_test_vectors.py
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Original file line number Diff line number Diff line change
@@ -0,0 +1,105 @@
ecn_show_config_output="""\
Profile: AZURE_LOSSLESS
----------------------- -------
red_max_threshold 2097152
wred_green_enable true
ecn ecn_all
green_min_threshold 1048576
red_min_threshold 1048576
wred_yellow_enable true
yellow_min_threshold 1048576
green_max_threshold 2097152
green_drop_probability 5
yellow_max_threshold 2097152
wred_red_enable true
yellow_drop_probability 5
red_drop_probability 5
----------------------- -------
"""

testData = {
'ecn_show_config' : {'cmd' : ['show'],
'args' : [],
'rc' : 0,
'rc_output': ecn_show_config_output
},
'ecn_cfg_gmin' : {'cmd' : ['config'],
'args' : ['-profile', 'AZURE_LOSSLESS', '-gmin', '1048600'],
'rc' : 0,
'cmp_args' : ['AZURE_LOSSLESS,green_min_threshold,1048600']
},
'ecn_cfg_gmax' : {'cmd' : ['config'],
'args' : ['-profile', 'AZURE_LOSSLESS', '-gmax', '2097153'],
'rc' : 0,
'cmp_args' : ['AZURE_LOSSLESS,green_max_threshold,2097153']
},
'ecn_cfg_ymin' : {'cmd' : ['config'],
'args' : ['-profile', 'AZURE_LOSSLESS', '-ymin', '1048600'],
'rc' : 0,
'cmp_args' : ['AZURE_LOSSLESS,yellow_min_threshold,1048600']
},
'ecn_cfg_ymax' : {'cmd' : ['config'],
'args' : ['-profile', 'AZURE_LOSSLESS', '-ymax', '2097153'],
'rc' : 0,
'cmp_args' : ['AZURE_LOSSLESS,yellow_max_threshold,2097153']
},
'ecn_cfg_rmin' : {'cmd' : ['config'],
'args' : ['-profile', 'AZURE_LOSSLESS', '-rmin', '1048600'],
'rc' : 0,
'cmp_args' : ['AZURE_LOSSLESS,red_min_threshold,1048600']
},
'ecn_cfg_rmax' : {'cmd' : ['config'],
'args' : ['-profile', 'AZURE_LOSSLESS', '-rmax', '2097153'],
'rc' : 0,
'cmp_args' : ['AZURE_LOSSLESS,red_max_threshold,2097153']
},
'ecn_cfg_rdrop' : {'cmd' : ['config'],
'args' : ['-profile', 'AZURE_LOSSLESS', '-rdrop', '10'],
'rc' : 0,
'cmp_args' : ['AZURE_LOSSLESS,red_drop_probability,10']
},
'ecn_cfg_ydrop' : {'cmd' : ['config'],
'args' : ['-profile', 'AZURE_LOSSLESS', '-ydrop', '11'],
'rc' : 0,
'cmp_args' : ['AZURE_LOSSLESS,yellow_drop_probability,11']
},
'ecn_cfg_gdrop' : {'cmd' : ['config'],
'args' : ['-profile', 'AZURE_LOSSLESS', '-gdrop', '12'],
'rc' : 0,
'cmp_args' : ['AZURE_LOSSLESS,green_drop_probability,12']
},
'ecn_cfg_multi_set' : {'cmd' : ['config'],
'args' : ['-profile', 'AZURE_LOSSLESS', '-gdrop', '12', '-gmax', '2097153'],
'rc' : 0,
'cmp_args' : ['AZURE_LOSSLESS,green_drop_probability,12',
'AZURE_LOSSLESS,green_max_threshold,2097153'
]
},
'ecn_cfg_gmin_gmax_invalid' : {'cmd' : ['config'],
'args' : ['-profile', 'AZURE_LOSSLESS', '-gmax', '2097153', '-gmin', '2097154'],
'rc' : 1,
'rc_msg' : 'Invalid gmin (2097154) and gmax (2097153). gmin should be smaller than gmax'
},
'ecn_cfg_ymin_ymax_invalid' : {'cmd' : ['config'],
'args' : ['-profile', 'AZURE_LOSSLESS', '-ymax', '2097153', '-ymin', '2097154'],
'rc' : 1,
'rc_msg' : 'Invalid ymin (2097154) and ymax (2097153). ymin should be smaller than ymax'
},
'ecn_cfg_rmin_rmax_invalid' : {'cmd' : ['config'],
'args' : ['-profile', 'AZURE_LOSSLESS', '-rmax', '2097153', '-rmin', '2097154'],
'rc' : 1,
'rc_msg' : 'Invalid rmin (2097154) and rmax (2097153). rmin should be smaller than rmax'
},
'ecn_cfg_rmax_invalid' : {'cmd' : ['config'],
'args' : ['-profile', 'AZURE_LOSSLESS', '-rmax', '-2097153'],
'rc' : 1,
'rc_msg' : 'Invalid rmax (-2097153). rmax should be an non-negative integer'
},
'ecn_cfg_rdrop_invalid' : {'cmd' : ['config'],
'args' : ['-profile', 'AZURE_LOSSLESS', '-rdrop', '105'],
'rc' : 1,
'rc_msg' : 'Invalid value for "-rdrop": 105 is not in the valid range of 0 to 100'
}

}
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