[XFS] Cleanup maxrecs calculation.

Clean up the way the maximum and minimum records for the btree blocks are
calculated. For the alloc and inobt btrees all the values are
pre-calculated in xfs_mount_common, and we switch the current loop around
the ugly generic macros that use cpp token pasting to generate type names
to two small helpers in normal C code. For the bmbt and bmdr trees these
helpers also exist, but can be called during runtime, too. Here we also
kill various macros dealing with them and inline the logic into the
get_minrecs / get_maxrecs / get_dmaxrecs methods in xfs_bmap_btree.c.

Note that all these new helpers take an xfs_mount * argument which will be
needed to determine the size of a btree block once we add support for
extended btree blocks with CRCs and other RAS information.

SGI-PV: 988146

SGI-Modid: xfs-linux-melb:xfs-kern:32292a

Signed-off-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Donald Douwsma <donaldd@sgi.com>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>

1 files changed, 6 insertions, 6 deletions

diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h
index c6846810936a..f4644d715484 100644
--- a/fs/xfs/xfs_mount.h
+++ b/fs/xfs/xfs_mount.h
@@ -276,12 +276,12 @@ typedef struct xfs_mount {
         uint                    m_blockmask;    /* sb_blocksize-1 */
         uint                    m_blockwsize;   /* sb_blocksize in words */
         uint                    m_blockwmask;   /* blockwsize-1 */
-        uint                    m_alloc_mxr[2]; /* XFS_ALLOC_BLOCK_MAXRECS */
-        uint                    m_alloc_mnr[2]; /* XFS_ALLOC_BLOCK_MINRECS */
-        uint                    m_bmap_dmxr[2]; /* XFS_BMAP_BLOCK_DMAXRECS */
-        uint                    m_bmap_dmnr[2]; /* XFS_BMAP_BLOCK_DMINRECS */
-        uint                    m_inobt_mxr[2]; /* XFS_INOBT_BLOCK_MAXRECS */
-        uint                    m_inobt_mnr[2]; /* XFS_INOBT_BLOCK_MINRECS */
+        uint                    m_alloc_mxr[2]; /* max alloc btree records */
+        uint                    m_alloc_mnr[2]; /* min alloc btree records */
+        uint                    m_bmap_dmxr[2]; /* max bmap btree records */
+        uint                    m_bmap_dmnr[2]; /* min bmap btree records */
+        uint                    m_inobt_mxr[2]; /* max inobt btree records */
+        uint                    m_inobt_mnr[2]; /* min inobt btree records */
         uint                    m_ag_maxlevels; /* XFS_AG_MAXLEVELS */
         uint                    m_bm_maxlevels[2]; /* XFS_BM_MAXLEVELS */
         uint                    m_in_maxlevels; /* XFS_IN_MAXLEVELS */