Btrfs: Make free space cache code generic

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So we can re-use the code to cache free inode numbers.

The change is quite straightforward. Two new structures are introduced.

- struct btrfs_free_space_ctl

  We move those variables that are used for caching free space from
  struct btrfs_block_group_cache to this new struct.

- struct btrfs_free_space_op

  We do block group specific work (e.g. calculation of extents threshold)
  through functions registered in this struct.

And then we can remove references to struct btrfs_block_group_cache.

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>

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This commit is contained in:

Li Zefan 2011-03-29 13:46:06 +08:00

parent f38b6e754d

commit 34d52cb6c5

4 changed files with 271 additions and 223 deletions

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7

fs/btrfs/ctree.h

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37

fs/btrfs/extent-tree.c

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430

fs/btrfs/free-space-cache.c

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20

fs/btrfs/free-space-cache.h

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