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test: Correct pylint warnings in fs_helper

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Tidy this up so that pylint is happy. Use hex for the 1MB size and make
sure it is not a floating-point value.

Add a little main program to allow the code to be tried out, since at
present is only called from a long-running test.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2022-10-29 19:47:06 -06:00
parent 4349ba5977
commit 7cbb57321e
1 changed files with 25 additions and 13 deletions
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38
test/py/tests/fs_helper.py
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@ -1,10 +1,10 @@
# SPDX-License-Identifier: GPL-2.0+
#
# Helper functions for dealing with filesystems
#
# Copyright (c) 2018, Linaro Limited
# Author: Takahiro Akashi <takahiro.akashi@linaro.org>
"""Helper functions for dealing with filesystems"""
import re
import os
from subprocess import call, check_call, check_output, CalledProcessError
@ -13,12 +13,16 @@ def mk_fs(config, fs_type, size, prefix):
"""Create a file system volume
Args:
config (u_boot_config): U-Boot configuration
fs_type (str): File system type, e.g. 'ext4'
size (int): Size of file system in bytes
prefix (str): Prefix string of volume's file name
Raises:
CalledProcessError: if any error occurs when creating the filesystem
"""
fs_img = '%s.%s.img' % (prefix, fs_type)
fs_img = config.persistent_data_dir + '/' + fs_img
fs_img = f'{prefix}.{fs_type}.img'
fs_img = os.path.join(config.persistent_data_dir, fs_img)
if fs_type == 'fat16':
mkfs_opt = '-F 16'
@ -32,23 +36,31 @@ def mk_fs(config, fs_type, size, prefix):
else:
fs_lnxtype = fs_type
count = (size + 1048576 - 1) / 1048576
count = (size + 0x100000 - 1) // 0x100000
# Some distributions do not add /sbin to the default PATH, where mkfs lives
if '/sbin' not in os.environ["PATH"].split(os.pathsep):
os.environ["PATH"] += os.pathsep + '/sbin'
try:
check_call('rm -f %s' % fs_img, shell=True)
check_call('dd if=/dev/zero of=%s bs=1M count=%d'
% (fs_img, count), shell=True)
check_call('mkfs.%s %s %s'
% (fs_lnxtype, mkfs_opt, fs_img), shell=True)
check_call(f'rm -f {fs_img}', shell=True)
check_call(f'dd if=/dev/zero of={fs_img} bs=1M count={count}',
shell=True)
check_call(f'mkfs.{fs_lnxtype} {mkfs_opt} {fs_img}', shell=True)
if fs_type == 'ext4':
sb_content = check_output('tune2fs -l %s' % fs_img, shell=True).decode()
sb_content = check_output(f'tune2fs -l {fs_img}',
shell=True).decode()
if 'metadata_csum' in sb_content:
check_call('tune2fs -O ^metadata_csum %s' % fs_img, shell=True)
check_call(f'tune2fs -O ^metadata_csum {fs_img}', shell=True)
return fs_img
except CalledProcessError:
call('rm -f %s' % fs_img, shell=True)
call(f'rm -f {fs_img}', shell=True)
raise
# Just for trying out
if __name__ == "__main__":
import collections
CNF= collections.namedtuple('config', 'persistent_data_dir')
mk_fs(CNF('.'), 'ext4', 0x1000000, 'pref')