Proposal

SUMMARY

• The goal is to add ext3 (third extended filesystem) support to the Mac OS X.

SCOPE

• The ext3 support would work as a kernel extention (k-ext) in Mac OS X, based on existing ext2 project (ext2fsx). The difference between ext3 and ext2 is ext3 is with journaling.
• Success is defined as successfully read/write ext3 filesystem and resume from crashes, with acceptable code quality.

DECISIONS

• Pre-planned work hours: 15~20 hours per week.
• Basic plan is to support recovery from crashes by reading journals, then adding support for journaling (commit/checkpoint), finally make some useful utilities which are included in current ext2fsx.
  

MILESTONES

• October 10: recovery from crashes
• October 20: journal commiting
• October 30: journal checkpointing
• November 15: debugging/testing complete
• November 20: utilities
• December 5: code cleanup done

FINISHED TASKS

• proposal (done 9/28)
• read ext2fsx code (done 9/15)

TASK HORIZON

• read journal daemon code (jbd) in linux src (10/1)
• write a tool to make ext3 disk dirty (with some journaling unflushed to disk) (10/5)
• write recovery support (10/10)

LINKS

• BLOG