[XFS] add get_maxrecs btree operation

Factor xfs_btree_maxrecs into a per-btree operation.

The get_maxrecs method is based on a patch from Dave Chinner.

SGI-PV: 985583

SGI-Modid: xfs-linux-melb:xfs-kern:32188a

Signed-off-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
Signed-off-by: Bill O'Donnell <billodo@sgi.com>
Signed-off-by: David Chinner <david@fromorbit.com>

1 files changed, 9 insertions, 0 deletions

diff --git a/fs/xfs/xfs_bmap_btree.c b/fs/xfs/xfs_bmap_btree.c
index 16f2fde6433d..bdcfbea1e062 100644
--- a/fs/xfs/xfs_bmap_btree.c
+++ b/fs/xfs/xfs_bmap_btree.c
@@ -2415,6 +2415,14 @@ xfs_bmbt_dup_cursor(
         return new;
 }
 
+STATIC int
+xfs_bmbt_get_maxrecs(
+        struct xfs_btree_cur    *cur,
+        int                     level)
+{
+        return XFS_BMAP_BLOCK_IMAXRECS(level, cur);
+}
+
 #ifdef XFS_BTREE_TRACE
 ktrace_t        *xfs_bmbt_trace_buf;
 
@@ -2502,6 +2510,7 @@ xfs_bmbt_trace_record(
 
 static const struct xfs_btree_ops xfs_bmbt_ops = {
         .dup_cursor             = xfs_bmbt_dup_cursor,
+        .get_maxrecs            = xfs_bmbt_get_maxrecs,
 
 #ifdef XFS_BTREE_TRACE
         .trace_enter            = xfs_bmbt_trace_enter,