E2fsprogs features and patches
From Ext4
(Difference between revisions)
(Update fixes to the uninit_bg feature.) |
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* Patches submitted to the mailing list by Aneesh Kumar | * Patches submitted to the mailing list by Aneesh Kumar | ||
* In the 'pu' branch; needs work | * In the 'pu' branch; needs work | ||
− | * Only use the undo manager with mke2fs if uninit blockgroups and lazy inode table init is enabled | + | * Only use the undo manager with mke2fs if uninit blockgroups and lazy inode table init is enabled '''DONE''' |
− | * 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. | + | * 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. '''DONE''' |
== Uninitialized block groups == | == Uninitialized block groups == | ||
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* The return value of ext2fs_super_and_bgd_loc() is not to be trusted. Document this in the source code. '''DONE''' | * The return value of ext2fs_super_and_bgd_loc() is not to be trusted. Document this in the source code. '''DONE''' | ||
* Make sure ext2fs_super_and_bgd_loc() does not get used anywhere where the return value is expected to be accurate (aside from mke2fs). '''PARTIALLY DONE''' | * Make sure ext2fs_super_and_bgd_loc() does not get used anywhere where the return value is expected to be accurate (aside from mke2fs). '''PARTIALLY DONE''' | ||
− | * 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. | + | * 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. '''DONE''' |
* Integrate flex-bg meta-data grouping support and make sure it works well with uninit block groups | * 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''' | * Disentangle lazy_bg and meta_bg features '''DONE''' |
Revision as of 20:57, 21 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 DONE
- 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. DONE
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. DONE
- Make sure ext2fs_super_and_bgd_loc() does not get used anywhere where the return value is expected to be accurate (aside from mke2fs). PARTIALLY DONE
- 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. DONE
- 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, which unfortunately broke the shared library ABI.
- Ted Ts'o suggests a different approach:
- http://thread.gmane.org/gmane.comp.file-systems.ext4/2845
- http://thread.gmane.org/gmane.comp.file-systems.ext4/2125
- Partial support is gradually getting added into the e2fsprogs mainline.
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