tree 12bc85f663f6be62fff23c583309bcd0bf0c1237
parent bc8883eb775dd18d8b84733d8b3a3955b72d103a
author Darrick J. Wong <djwong@kernel.org> 1632418326 -0700
committer Darrick J. Wong <djwong@kernel.org> 1634669116 -0700

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>
Reviewed-by: Dave Chinner <dchinner@redhat.com>