btrfs: unify logic to decide if we need to walk down into a node during snapshot delete

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We currently duplicate the logic for walking into a node during snapshot
delete.  In one case it is during the actual delete, and in the other we
use it for deciding if we should reada the block or not.

Factor this code into it's own helper and comment fully what we're
doing, and then update the two users to use the new helper.

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

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Josef Bacik 2024-05-07 14:12:08 -04:00 • committed by David Sterba

parent 4c4686d19d

commit 2b73c7e761

1 changed files with 89 additions and 44 deletions

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fs/btrfs/extent-tree.c

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