btrfs: reloc: refactor direct tree backref processing into its own function

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For BTRFS_SHARED_BLOCK_REF_KEY, its processing is straightforward, as we
now the parent node bytenr directly.

If the parent is already cached, or a root, call it a day.
If the parent is not cached, add it pending list.

This patch will just refactor this part into its own function,
handle_direct_tree_backref() and add some comment explaining the
@ref_key parameter.

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

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Qu Wenruo 2020-03-05 14:06:29 +08:00 • committed by David Sterba

parent 2433bea592

commit 4007ea87d9

1 changed files with 78 additions and 52 deletions

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fs/btrfs/relocation.c

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