btrfs: zlib: introduce zlib_compress_bio() helper

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The new helper has the following enhancements against the existing
zlib_compress_folios()

- Much smaller parameter list

  No more shared IN/OUT members, no need to pre-allocate a
  compressed_folios[] array.

  Just a workspace and compressed_bio pointer, everything we need can be
  extracted from that @cb pointer.

- Ready-to-be-submitted compressed bio

  Although the caller still needs to do some common works like
  rounding up and zeroing the tailing part of the last fs block.

Reviewed-by: Boris Burkov <boris@bur.io>
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 2026-01-29 13:53:40 +10:30 • committed by David Sterba

parent bba959655a

commit 3d74a7556f

2 changed files with 195 additions and 0 deletions

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1

fs/btrfs/compression.h

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194

fs/btrfs/zlib.c

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