b9558d8a06
Implement directory-iteration for the ext4l filesystem driver, allowing callers to iterate through directory entries one at a time. Add ext4l_opendir() which opens a directory and returns a stream handle, ext4l_readdir() which returns the next directory entry, and ext4l_closedir() which closes the stream and frees resources. The implementation uses a struct dir_context to capture single entries from ext4_readdir(), with logic to skip previously returned entries since the htree code may re-emit them. Update struct file to include a position. Wire these functions into fs_legacy.c for the ext4l filesystem type. Co-developed-by: Claude Opus 4.5 <noreply@anthropic.com> Signed-off-by: Simon Glass <simon.glass@canonical.com>
99 lines
3.6 KiB
Python
99 lines
3.6 KiB
Python
# SPDX-License-Identifier: GPL-2.0+
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# Copyright 2025 Canonical Ltd
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# Written by Simon Glass <simon.glass@canonical.com>
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#
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# Test for ext4l filesystem driver
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"""
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Test ext4l filesystem probing via C unit test.
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"""
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import os
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from subprocess import CalledProcessError, check_call
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from tempfile import NamedTemporaryFile
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import pytest
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@pytest.mark.boardspec('sandbox')
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class TestExt4l:
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"""Test ext4l filesystem operations."""
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@pytest.fixture(scope='class')
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def ext4_image(self, u_boot_config):
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"""Create an ext4 filesystem image for testing.
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Args:
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u_boot_config (u_boot_config): U-Boot configuration.
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Yields:
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str: Path to the ext4 image file.
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"""
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image_path = os.path.join(u_boot_config.persistent_data_dir,
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'ext4l_test.img')
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try:
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# Create a 64MB ext4 image
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check_call(f'dd if=/dev/zero of={image_path} bs=1M count=64 2>/dev/null',
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shell=True)
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check_call(f'mkfs.ext4 -q {image_path}', shell=True)
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# Add test files using debugfs (no mount required)
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with NamedTemporaryFile(mode='w', delete=False) as tmp:
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tmp.write('hello world\n')
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tmp_path = tmp.name
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try:
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# Add a regular file
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check_call(f'debugfs -w {image_path} '
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f'-R "write {tmp_path} testfile.txt" 2>/dev/null',
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shell=True)
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# Add a subdirectory
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check_call(f'debugfs -w {image_path} '
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f'-R "mkdir subdir" 2>/dev/null',
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shell=True)
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# Add a file in the subdirectory
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check_call(f'debugfs -w {image_path} '
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f'-R "write {tmp_path} subdir/nested.txt" 2>/dev/null',
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shell=True)
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# Add a symlink
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check_call(f'debugfs -w {image_path} '
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f'-R "symlink link.txt testfile.txt" 2>/dev/null',
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shell=True)
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finally:
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os.unlink(tmp_path)
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except CalledProcessError:
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pytest.skip('Failed to create ext4 image')
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yield image_path
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# Cleanup
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if os.path.exists(image_path):
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os.remove(image_path)
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def test_probe(self, ubman, ext4_image):
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"""Test that ext4l can probe an ext4 filesystem."""
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with ubman.log.section('Test ext4l probe'):
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output = ubman.run_command(
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f'ut -f fs fs_test_ext4l_probe_norun fs_image={ext4_image}')
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assert 'failures: 0' in output
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def test_msgs(self, ubman, ext4_image):
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"""Test that ext4l_msgs env var produces mount messages."""
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with ubman.log.section('Test ext4l msgs'):
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output = ubman.run_command(
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f'ut -f fs fs_test_ext4l_msgs_norun fs_image={ext4_image}')
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assert 'failures: 0' in output
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def test_ls(self, ubman, ext4_image):
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"""Test that ext4l can list directory contents."""
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with ubman.log.section('Test ext4l ls'):
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output = ubman.run_command(
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f'ut -f fs fs_test_ext4l_ls_norun fs_image={ext4_image}')
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assert 'failures: 0' in output
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def test_opendir(self, ubman, ext4_image):
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"""Test that ext4l can iterate directory entries."""
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with ubman.log.section('Test ext4l opendir'):
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output = ubman.run_command(
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f'ut -f fs fs_test_ext4l_opendir_norun fs_image={ext4_image}')
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assert 'failures: 0' in output
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