Implement ext4l_statfs() to return filesystem statistics using the
ext4 superblock. The function returns block size, total block count,
and free block count.
Add unit test to verify the statfs implementation returns valid data.
Cover-letter:
fs: ext4l: Complete read-only filesystem support (Part I)
This series completes read-only support for the ext4l filesystem driver,
which is a port of the Linux ext4 driver to U-Boot.
The ext4l driver provides more complete ext4 support than the existing
ext4 driver, including proper handling of extents, directory hashing,
and other ext4 features.
Changes include:
Sandbox infrastructure:
- Fix IRQ macros and buffer_head includes for sandbox builds
Core fixes:
- Fix path lookup by implementing proper dentry operations
- Fix fscrypt_match_name to do actual name comparison
Filesystem operations:
- Add directory listing (opendir/readdir/closedir)
- Add file existence check (exists)
- Add file size query (size)
- Add file read support (read)
- Add UUID query (uuid)
- Add filesystem statistics (statfs)
New command:
- Add fsinfo command to display filesystem statistics
Testing:
- Add comprehensive unit tests for all operations
- Enable fsuuid command for sandbox testing
END
Co-developed-by: Claude Opus 4.5 <noreply@anthropic.com>
Signed-off-by: Simon Glass <simon.glass@canonical.com>
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