E2fsprogs features and patches
From Ext4
Contents |
Works in progress
Undo I/O manager
- Patches submitted to the mailing list by Aneesh Kumar
- In the 'pu' branch; needs work
- Only use the undo manager with mke2fs if uninit blockgroups and lazy inode table init is enabled
- Don't make the undo manager bomb out with mysterious errors if the directory does not exist, or if a filesystem has previously been created and there is an undo file there.
Uninitialized block groups
- Basic support (with bugs) integrated into e2fsprogs mainline
- Rename uninit_groups to uninit_bg to be consistent with other defined features. Retain the old name for historical purpose. DONE
- The return value of ext2fs_super_and_bgd_loc() is not to be trusted. Document this in the source code.
- Make sure ext2fs_super_and_bgd_loc() does not get used anywhere where the return value is expected to be accurate (aside from mke2fs).
- Remove lazy_bg feature from being set in mke2fs. Feature has been declare a dangerous hack by its creator, remove it to avoid people building on top of it.
- Integrate flex-bg meta-data grouping support and make sure it works well with uninit block groups
- Disentangle lazy_bg and meta_bg features DONE
64-bit block support
- Patches submitted to the mailing list by Valerie Clement
- Requires different binaries for doing 64bit support.
- Unified binaries will most likely require API/ABI changes.
- 64bit blk support requires 64bit binaries. Breaks on PPC64 32bit user-space env.
- Ted T'so suggests a different approach:
http://thread.gmane.org/gmane.comp.file-systems.ext4/2125
i_version support:
- Status of kernel patches?
- No work needed for e2fsprogs except display support in debugfs
Extents support
- Basic support in git tree
- Eric sandeen working on ext2fs_extent_set_bmap() functionality, needed to finish e2fsck pass1b and debugfs file write support.
Nano second support
- Check out kernel support; does it work correctly?
- No work needed for e2fsprogs except display support in debugfs
Done
- Greater than 32000 subdir support
- Huge file support