diff options
| author | Darrick J. Wong <djwong@kernel.org> | 2021-09-23 10:32:06 -0700 |
|---|---|---|
| committer | Darrick J. Wong <djwong@kernel.org> | 2021-10-14 13:11:56 -0700 |
| commit | b30824d98993239c1e1bd4124e458ad1fcbe1f14 (patch) | |
| tree | 87f7982a5ae9c1251fe14bc2aeadba03ebf10b8d /fs/xfs/libxfs/xfs_bmap_btree.h | |
| parent | b0e4563697bc585f272d002ae1c0b3a7b62d1d10 (diff) | |
xfs: compute absolute maximum nlevels for each btree type
Add code for all five btree types so that we can compute the absolute
maximum possible btree height for each btree type. This is a setup for
the next patch, which makes every btree type have its own cursor cache.
The functions are exported so that we can have xfs_db report the
absolute maximum btree heights for each btree type, rather than making
everyone run their own ad-hoc computations.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Diffstat (limited to 'fs/xfs/libxfs/xfs_bmap_btree.h')
| -rw-r--r-- | fs/xfs/libxfs/xfs_bmap_btree.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/xfs/libxfs/xfs_bmap_btree.h b/fs/xfs/libxfs/xfs_bmap_btree.h index 729e3bc569be..2a1c9e607b52 100644 --- a/fs/xfs/libxfs/xfs_bmap_btree.h +++ b/fs/xfs/libxfs/xfs_bmap_btree.h @@ -110,4 +110,6 @@ extern struct xfs_btree_cur *xfs_bmbt_init_cursor(struct xfs_mount *, extern unsigned long long xfs_bmbt_calc_size(struct xfs_mount *mp, unsigned long long len); +unsigned int xfs_bmbt_maxlevels_ondisk(void); + #endif /* __XFS_BMAP_BTREE_H__ */ |