jbd2: Add journal.c from Linux

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Add the JBD2 journaling layer core journal management from the
Linux 6.18 kernel ext4 filesystem driver.

journal.c handles:
- Journal initialisation and destruction
- Superblock management
- Journal thread (kjournald2) operations
- Block-mapping for journal storage
- Feature flag management
- Journal format versioning
- Fast-commit support infrastructure

This file provides the main journal_t structure management and
is the entry point for creating and destroying journals.

Co-developed-by: Claude Opus 4.5 <noreply@anthropic.com>
Signed-off-by: Simon Glass <simon.glass@canonical.com>

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This commit is contained in:

Simon Glass

2025-12-21 04:54:52 -07:00

parent d2feaa01d8

commit 33ba48ad14

1 changed files with 3162 additions and 0 deletions

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