Hi all,

This patch improves the robustness and correctness of the HFS+ filesystem implementation by addressing issues in btree.c and options.c.

Changes in fs/hfsplus/btree.c:

• Removed unused mod variable.
• Fixed potential out-of-bounds access in clumptbl.
• Made clump size calculation more precise (0.8% explicitly).
• Ensured clump size is properly aligned to block/node size.
• Improved loop readability for exponent calculation.
• Added a fallback to prevent invalid clump sizes.
• Updated comment link to Apple's new OSS repository.

Changes in fs/hfsplus/options.c:

• Properly check the "force" option during remount.
• Validate string lengths safely using strnlen().
• Ensure previous NLS mappings are unloaded before loading new ones.
• Improve error messages for clarity.

Summary of Changes

 fs/hfsplus/btree.c   | 176 +++++++++++++++++++++++--------------------
 fs/hfsplus/options.c | 120 ++++++++++++++---------------
 2 files changed, 154 insertions(+), 142 deletions(-)

Please find the patch attached

Best Regards,
Pranjal Prasad