E2fsprogs features and patches
From Ext4
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* git clone git://repo.or.cz/e2fsprogs.git | * git clone git://repo.or.cz/e2fsprogs.git | ||
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= Works in progress = | = Works in progress = | ||
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* Ted T'so suggests a different approach: | * Ted T'so suggests a different approach: | ||
** http://thread.gmane.org/gmane.comp.file-systems.ext4/2845 | ** http://thread.gmane.org/gmane.comp.file-systems.ext4/2845 | ||
− | + | ** http://thread.gmane.org/gmane.comp.file-systems.ext4/2125 | |
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== i_version support: == | == i_version support: == | ||
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* Check out kernel support; does it work correctly? | * Check out kernel support; does it work correctly? | ||
* No work needed for e2fsprogs except display support in debugfs | * No work needed for e2fsprogs except display support in debugfs | ||
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+ | == Miscellaneous items == | ||
+ | |||
+ | * If the inode's extra_isize is less than the superblock's min_extra_isize, it needs to be fixed in e2fsck pass1. | ||
+ | * The combination of meta_bg and resize_inode creates a corrupt filesystem (even in the 1.40.x's maint branch) | ||
= Done = | = Done = |
Revision as of 22:11, 20 April 2008
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:
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
Miscellaneous items
- If the inode's extra_isize is less than the superblock's min_extra_isize, it needs to be fixed in e2fsck pass1.
- The combination of meta_bg and resize_inode creates a corrupt filesystem (even in the 1.40.x's maint branch)
Done
- Greater than 32000 subdir support
- Huge file support