60788f5431
Implement directory listing (ls) for the ext4l filesystem driver. This includes path resolution with symlink following (limited to 8 levels to prevent loops). Add ext4l_ls() which uses ext4_lookup() for path resolution and ext4_readdir() for directory enumeration. The dir_context actor callback formats and prints each directory entry. Export ext4_lookup() from namei.c and add declarations to ext4.h. Add test_ls to the Python test suite, which creates a test file using debugfs and verifies it appears in the directory listing with the correct size. Co-developed-by: Claude Opus 4.5 <noreply@anthropic.com> Cover-letter: ext4l: Add support for listing directoties (Part H) This series adds directory-listing support to the ext4l filesystem driver. It exports a few required functions from the Linux ext4 code, fixes the dir_emit() stub to properly call the actor callback, and implements ext4l_ls() with path resolution and symlink following. END Signed-off-by: Simon Glass <simon.glass@canonical.com>
79 lines
2.6 KiB
Python
79 lines
2.6 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 a test file 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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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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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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