btrfs: introduce the skeleton of btrfs_subpage structure

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For sectorsize < page size support, we need a structure to record extra
status info for each sector of a page.

Introduce the skeleton structure, all subpage related code would go to
subpage.[ch].

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 2021-01-26 16:33:47 +08:00 • committed by David Sterba

parent 62c053fbb2

commit cac06d843f

4 changed files with 78 additions and 2 deletions

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3

fs/btrfs/Makefile

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43

fs/btrfs/subpage.c

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33

fs/btrfs/subpage.h

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1

fs/btrfs/super.c

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