Document ext2/ext3 Filesystem - Value 5

[LSantha]

Concept: ext2/ext3 Filesystem

Value: 5 (Critical - Linux-native filesystem)

What it is: ext2/ext3 filesystem with block groups, inodes, journaling

Key files:

• fs/src/fs/org/jnode/fs/ext2/Ext2FileSystem.java
• fs/src/fs/org/jnode/fs/ext3/Ext3FileSystem.java

Bridges: Filesystem drivers, Journaling, Blocks

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Documentation Requirements

For Value 5 (Critical):

1. Update ALL 4 sections of the index (index.md):

   • Pages Table: Add new page in alphabetical order
   • Concepts → Pages: Add the page name. Also add discovered Technical Terms (e.g., "inode", "block group", "journaling")
   • Source Path → Pages: Map fs/src/fs/org/jnode/fs/ext2/ and fs/src/fs/org/jnode/fs/ext3/ to the new page
   • Task Routing: Add to relevant developer task categories with meaningful routing ideas (1-3 entries)

2. Update Glossary: Add 1-sentence definition for any new project-specific term

3. Broader Search: Search for related "Helper", "Manager", "Layout", or "Constants" classes (e.g., inode structures, superblock, block bitmap)

Skill Reference

Use update-wiki skill for wiki maintenance workflow

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Related Concepts (from index.md)

• [[VFS-Layer]]
• [[Filesystem-Layer]]
• [[Block-Device-Layer]]

[LSantha]

/oc Please proceed with this task.

[opencode-agent]

Wiki documentation complete:

Created: .wiki/Ext2-Ext3-Filesystem.md — covering superblock structure, block group layout with sparse_super, inode direct/indirect addressing with extent support, block/inode bitmap allocation, directory record format, ext3 journaling via feature flags, and feature compatibility checks.

Updated:

• index.md — Pages table, Concepts → Pages (Ext2-Ext3-Filesystem, block group, block bitmap, inode, journaling), Source Path → Pages (ext2/, ext3/), Task Routing (filesystem driver entry)
• Glossary.md — block group and block bitmap definitions
• Changelog.md — today's entry

Pushed to wiki repository.

Wiki URL: https://github.com/LSantha/jnode_ai/wiki/Ext2-Ext3-Filesystem

Issue #97 closed.

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[LSantha]

/oc Please proceed with this task.

[opencode-agent]

The task has already been completed. According to the issue comments, the ext2/ext3 filesystem documentation was created and pushed to the wiki.

Wiki URL: https://github.com/LSantha/jnode_ai/wiki/Ext2-Ext3-Filesystem

Issue #97 is closed - all documentation updates (index.md, Glossary.md, Changelog.md, and the new Ext2-Ext3-Filesystem.md page) have been completed and pushed.

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[LSantha]

/oc Please proceed with this task.

[LSantha]

/oc Please proceed with this task.

[opencode-agent]

The ext2/ext3 filesystem documentation is already complete from a previous session:

Wiki Page: .wiki/Ext2-Ext3-Filesystem.md exists with comprehensive coverage of:

• Superblock structure, block group layout with sparse_super
• Inode direct/indirect addressing and extent support
• Block/inode bitmap allocation
• Directory record format
• ext3 journaling via feature flags and feature compatibility checks
• Key helper classes (BlockBitmap, INodeBitmap, INodeTable, BlockCache, Superblock, GroupDescriptor, etc.)

Index Updates (all 4 sections):

• Pages Table: line 37
• Concepts → Pages: lines 160, 170-172 (Ext2-Ext3-Filesystem, block bitmap, inode, journaling)
• Source Path → Pages: lines 364-365 (ext2/, ext3/)
• Task Routing: line 392

Glossary: block bitmap and block group defined (lines 19-20)

The issue requirements have been fully satisfied. No further action needed.

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[opencode-agent]

The ext2/ext3 Filesystem documentation task was already completed in the previous session. I verified:

• Wiki page exists: .wiki/Ext2-Ext3-Filesystem.md with full documentation
• Index updated: Pages table, Concepts → Pages (block group, block bitmap, inode, journaling), Source Path → Pages, Task Routing
• Glossary updated: block group, block bitmap definitions
• Changelog updated: May 10th entry
• Issue Document ext2/ext3 Filesystem - Value 5 #97 closed

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[LSantha]

/oc Please proceed with this task.