[PATCH 1/3] test/py: rewrite common tools for SquashFS tests
Joao Marcos Costa
jmcosta944 at gmail.com
Mon May 24 04:31:31 CEST 2021
Remove the previous OOP approach, which was confusing and incomplete.
Add more test cases by making SquashFS images with various options,
concerning file fragmentation and its compression. Add comments to
properly document the code.
Signed-off-by: Joao Marcos Costa <jmcosta944 at gmail.com>
---
.../test_fs/test_squashfs/sqfs_common.py | 198 ++++++++++++------
1 file changed, 133 insertions(+), 65 deletions(-)
diff --git a/test/py/tests/test_fs/test_squashfs/sqfs_common.py b/test/py/tests/test_fs/test_squashfs/sqfs_common.py
index c96f92c1d8..81a378a9f9 100644
--- a/test/py/tests/test_fs/test_squashfs/sqfs_common.py
+++ b/test/py/tests/test_fs/test_squashfs/sqfs_common.py
@@ -1,76 +1,144 @@
# SPDX-License-Identifier: GPL-2.0
-# Copyright (C) 2020 Bootlin
+# Copyright (C) 2021 Bootlin
# Author: Joao Marcos Costa <joaomarcos.costa at bootlin.com>
import os
-import random
-import string
+import shutil
import subprocess
-def sqfs_get_random_letters(size):
- letters = []
- for i in range(0, size):
- letters.append(random.choice(string.ascii_letters))
+"""
+standard test images table: Each table item is a key:value pair representing the
+output image name and its respective mksquashfs options. This table should be
+modified only when adding support for new compression algorithms.
+The 'default' case takes no options but the input and output names, so it must
+be assigned with an empty string.
+"""
+standard_table = {
+ 'default' : '',
+ 'lzo_comp_frag' : '',
+ 'lzo_frag' : '',
+ 'lzo_no_frag' : '',
+ 'zstd_comp_frag' : '',
+ 'zstd_frag' : '',
+ 'zstd_no_frag' : '',
+ 'gzip_comp_frag' : '',
+ 'gzip_frag' : '',
+ 'gzip_no_frag' : ''
+}
- return ''.join(letters)
+"""
+extra_table: Set this table's keys and values if you want to make squashfs images with
+your own customized options.
+"""
+extra_table = {}
-def sqfs_generate_file(path, size):
- content = sqfs_get_random_letters(size)
- file = open(path, "w")
+# path to source directory used to make squashfs test images
+sqfs_src_dir = 'sqfs_src_dir'
+
+"""
+Combines fragmentation and compression options into a list of strings.
+opts_list's firts item is an empty string as standard_table's first item is
+the 'default' case.
+"""
+def get_opts_list():
+ # supported compression options only
+ comp_opts = ['-comp lzo', '-comp zstd', '-comp gzip']
+ # file fragmentation options
+ frag_opts = ['-always-use-fragments', '-always-use-fragments -noF', '-no-fragments']
+
+ opts_list = [' ']
+ for c in comp_opts:
+ for f in frag_opts:
+ opts_list.append(' '.join([c, f]))
+
+ return opts_list
+
+def init_standard_table():
+ opts_list = get_opts_list()
+
+ for key, value in zip(standard_table.keys(), opts_list):
+ standard_table[key] = value
+
+def generate_file(file_name, file_size):
+ # file is filled with file_size * 'x'
+ content = ''
+ for i in range(file_size):
+ content += 'x'
+
+ file = open(file_name, 'w')
file.write(content)
file.close()
-class Compression:
- def __init__(self, name, files, sizes, block_size = 4096):
- self.name = name
- self.files = files
- self.sizes = sizes
- self.mksquashfs_opts = " -b " + str(block_size) + " -comp " + self.name
-
- def add_opt(self, opt):
- self.mksquashfs_opts += " " + opt
-
- def gen_image(self, build_dir):
- src = os.path.join(build_dir, "sqfs_src/")
- os.mkdir(src)
- for (f, s) in zip(self.files, self.sizes):
- sqfs_generate_file(src + f, s)
-
- # the symbolic link always targets the first file
- os.symlink(self.files[0], src + "sym")
-
- sqfs_img = os.path.join(build_dir, "sqfs-" + self.name)
- i_o = src + " " + sqfs_img
- opts = self.mksquashfs_opts
- try:
- subprocess.run(["mksquashfs " + i_o + opts], shell = True, check = True)
- except:
- print("mksquashfs error. Compression type: " + self.name)
- raise RuntimeError
-
- def clean_source(self, build_dir):
- src = os.path.join(build_dir, "sqfs_src/")
- for f in self.files:
- os.remove(src + f)
- os.remove(src + "sym")
- os.rmdir(src)
-
- def cleanup(self, build_dir):
- self.clean_source(build_dir)
- sqfs_img = os.path.join(build_dir, "sqfs-" + self.name)
- os.remove(sqfs_img)
-
-files = ["blks_only", "blks_frag", "frag_only"]
-sizes = [4096, 5100, 100]
-gzip = Compression("gzip", files, sizes)
-zstd = Compression("zstd", files, sizes)
-lzo = Compression("lzo", files, sizes)
-
-# use fragment blocks for files larger than block_size
-gzip.add_opt("-always-use-fragments")
-zstd.add_opt("-always-use-fragments")
-
-# avoid fragments if lzo is used
-lzo.add_opt("-no-fragments")
-
-comp_opts = [gzip, zstd, lzo]
+"""
+sqfs_src_dir
+├── empty-dir
+├── f1000
+├── f4096
+├── f5096
+├── subdir
+│ └── subdir-file
+└── sym -> subdir
+
+3 directories, 4 files
+"""
+def generate_sqfs_src_dir(build_dir):
+ path = os.path.join(build_dir, sqfs_src_dir)
+ print(path)
+ #path = build_dir + '/' + sqfs_src_dir
+ # make root directory
+ os.makedirs(path)
+
+ # 4096: minimum block size
+ file_name = 'f4096'
+ generate_file(os.path.join(path, file_name), 4096)
+
+ # 5096: minimum block size + 1000 chars (fragment)
+ file_name = 'f5096'
+ generate_file(os.path.join(path, file_name), 5096)
+
+ # 1000: less than minimum block size (fragment only)
+ file_name = 'f1000'
+ generate_file(os.path.join(path, file_name), 1000)
+
+ # sub-directory with a single file inside
+ subdir_path = os.path.join(path, 'subdir')
+ os.makedirs(subdir_path)
+ generate_file(os.path.join(subdir_path, 'subdir-file'), 100)
+
+ # symlink (target: sub-directory)
+ os.symlink('subdir', os.path.join(path, 'sym'))
+
+ # empty directory
+ os.makedirs(os.path.join(path, 'empty-dir'))
+
+def mksquashfs(args):
+ subprocess.run(['mksquashfs ' + args], shell = True, check = True,
+ stdout = subprocess.DEVNULL)
+
+def make_all_images(build_dir):
+
+ init_standard_table()
+ input_path = os.path.join(build_dir, sqfs_src_dir)
+
+ # make squashfs images according to standard_table
+ for out, opts in zip(standard_table.keys(), standard_table.values()):
+ output_path = os.path.join(build_dir, out)
+ mksquashfs(' '.join([input_path, output_path, opts]))
+
+ # make squashfs images according to extra_table
+ for out, opts in zip(extra_table.keys(), extra_table.values()):
+ output_path = os.path.join(build_dir, out)
+ mksquashfs(' '.join([input_path, output_path, opts]))
+
+def clean_all_images(build_dir):
+ for image_name in standard_table.keys():
+ image_path = os.path.join(build_dir, image_name)
+ os.remove(image_path)
+
+ for image_name in extra_table.keys():
+ image_path = os.path.join(build_dir, image_name)
+ os.remove(image_path)
+
+def clean_sqfs_src_dir(build_dir):
+ path = os.path.join(build_dir, sqfs_src_dir)
+ shutil.rmtree(path)
--
2.25.1
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