btrfs: rename btrfs_subpage structure

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With the incoming large data folios support, the structure name
btrfs_subpage is no longer correct, as for we can have multiple blocks
inside a large folio, and the block size is still page size.

So to follow the schema of iomap, rename btrfs_subpage to
btrfs_folio_state, along with involved enums.

There are still exported functions with "btrfs_subpage_" prefix, and I
believe for metadata the name "subpage" will stay forever as we will
never allocate a folio larger than nodesize anyway.

The full cleanup of the word "subpage" will happen in much smaller steps
in the future.

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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This commit is contained in:

Qu Wenruo 2025-06-02 10:08:53 +09:30 • committed by David Sterba

parent 1e17738d6b

commit 582cd4bad4

4 changed files with 156 additions and 150 deletions

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28

fs/btrfs/extent_io.c

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8

fs/btrfs/inode.c

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239

fs/btrfs/subpage.c

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31

fs/btrfs/subpage.h

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