1 files changed, 116 insertions, 0 deletions
diff --git a/test/py/tests/fs_helper.py b/test/py/tests/fs_helper.py
new file mode 100644
index 00000000000..b8a22b22806
--- /dev/null
+++ b/test/py/tests/fs_helper.py
@@ -0,0 +1,116 @@
+# SPDX-License-Identifier:      GPL-2.0+
+#
+# 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
+
+def mk_fs(config, fs_type, size, prefix, src_dir=None, size_gran = 0x100000):
+    """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
+        src_dir (str): Root directory to use, or None for none
+        size_gran (int): Size granularity of file system image in bytes
+
+    Raises:
+        CalledProcessError: if any error occurs when creating the filesystem
+    """
+    fs_img = f'{prefix}.{fs_type}.img'
+    fs_img = os.path.join(config.persistent_data_dir, fs_img)
+
+    if fs_type == 'fat12':
+        mkfs_opt = '-F 12'
+    elif fs_type == 'fat16':
+        mkfs_opt = '-F 16'
+    elif fs_type == 'fat32':
+        mkfs_opt = '-F 32'
+    else:
+        mkfs_opt = ''
+
+    if fs_type == 'exfat':
+        fs_lnxtype = 'exfat'
+    elif re.match('fat', fs_type) or fs_type == 'fs_generic':
+        fs_lnxtype = 'vfat'
+    else:
+        fs_lnxtype = fs_type
+
+    if src_dir:
+        if fs_lnxtype == 'ext4':
+            mkfs_opt = mkfs_opt + ' -d ' + src_dir
+        elif fs_lnxtype != 'vfat' and fs_lnxtype != 'exfat':
+            raise ValueError(f'src_dir not implemented for fs {fs_lnxtype}')
+
+    count = (size + size_gran - 1) // size_gran
+
+    # 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(f'rm -f {fs_img}', shell=True)
+        check_call(f'truncate -s $(( {size_gran} * {count} )) {fs_img}',
+                   shell=True)
+        check_call(f'mkfs.{fs_lnxtype} {mkfs_opt} {fs_img}', shell=True)
+        if fs_type == 'ext4':
+            sb_content = check_output(f'tune2fs -l {fs_img}',
+                                      shell=True).decode()
+            if 'metadata_csum' in sb_content:
+                check_call(f'tune2fs -O ^metadata_csum {fs_img}', shell=True)
+        elif fs_lnxtype == 'vfat' and src_dir:
+            check_call(f'mcopy -i {fs_img} -vsmpQ {src_dir}/* ::/', shell=True)
+        elif fs_lnxtype == 'exfat' and src_dir:
+            check_call(f'fattools cp {src_dir}/* {fs_img}', shell=True)
+        return fs_img
+    except CalledProcessError:
+        call(f'rm -f {fs_img}', shell=True)
+        raise
+
+def setup_image(ubman, devnum, part_type, img_size=20, second_part=False,
+                basename='mmc'):
+    """Create a disk image with a single partition
+
+    Args:
+        ubman (ConsoleBase): Console to use
+        devnum (int): Device number to use, e.g. 1
+        part_type (int): Partition type, e.g. 0xc for FAT32
+        img_size (int): Image size in MiB
+        second_part (bool): True to contain a small second partition
+        basename (str): Base name to use in the filename, e.g. 'mmc'
+
+    Returns:
+        tuple:
+            str: Filename of MMC image
+            str: Directory name of scratch directory
+    """
+    fname = os.path.join(ubman.config.source_dir, f'{basename}{devnum}.img')
+    mnt = os.path.join(ubman.config.persistent_data_dir, 'scratch')
+
+    spec = f'type={part_type:x}, size={img_size - 2}M, start=1M, bootable'
+    if second_part:
+        spec += '\ntype=c'
+
+    try:
+        check_call(f'mkdir -p {mnt}', shell=True)
+        check_call(f'qemu-img create {fname} {img_size}M', shell=True)
+        check_call(f'printf "{spec}" | sfdisk {fname}', shell=True)
+    except CalledProcessError:
+        call(f'rm -f {fname}', shell=True)
+        raise
+
+    return fname, mnt
+
+# Just for trying out
+if __name__ == "__main__":
+    import collections
+
+    CNF= collections.namedtuple('config', 'persistent_data_dir')
+
+    mk_fs(CNF('.'), 'ext4', 0x1000000, 'pref')