btrfs: remove unused raid56 functions which were dedicated for scrub

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Since the scrub rework, the following RAID56 functions are no longer
called:

- raid56_add_scrub_pages()
- raid56_alloc_missing_rbio()
- raid56_submit_missing_rbio()

Those functions are all utilized by scrub to handle missing device cases
for RAID56.

However the new scrub code handle them in a completely different way:

- If it's data stripe, go recovery path through btrfs_submit_bio()
- If it's P/Q stripe, it would be handled through
  raid56_parity_submit_scrub_rbio()
  And that function would handle dev-replace and repair properly.

Thus we can safely remove those functions.

Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

...

This commit is contained in:

Qu Wenruo 2023-04-12 14:47:50 +08:00 • committed by David Sterba

parent 13a62fd997

commit aca43fe839

2 changed files with 0 additions and 54 deletions

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47

fs/btrfs/raid56.c

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7

fs/btrfs/raid56.h

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