btrfs: refactor find_free_dev_extent_start()

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Factor out two functions from find_free_dev_extent_start().
dev_extent_search_start() decides the starting position of the search.
dev_extent_hole_check() checks if a hole found is suitable for device
extent allocation.

These functions also have the switch-cases to change the allocation
behavior depending on the policy.

Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

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Naohiro Aota 2020-02-25 12:56:09 +09:00 • committed by David Sterba

parent c4a816c67c

commit 3b4ffa4088

1 changed files with 58 additions and 20 deletions

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fs/btrfs/volumes.c

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