- switch (cur->bc_btnum) {
- case XFS_BTNUM_BNO:
- case XFS_BTNUM_CNT:
- a = XFS_BUF_TO_ALLOC_BLOCK(cur->bc_bufs[lev]);
- if ((lr & XFS_BTCUR_LEFTRA) && be32_to_cpu(a->bb_leftsib) != NULLAGBLOCK) {
- xfs_btree_reada_bufs(cur->bc_mp, cur->bc_private.a.agno,
- be32_to_cpu(a->bb_leftsib), 1);
- rval++;
- }
- if ((lr & XFS_BTCUR_RIGHTRA) && be32_to_cpu(a->bb_rightsib) != NULLAGBLOCK) {
- xfs_btree_reada_bufs(cur->bc_mp, cur->bc_private.a.agno,
- be32_to_cpu(a->bb_rightsib), 1);
- rval++;
- }
- break;
- case XFS_BTNUM_BMAP:
- b = XFS_BUF_TO_BMBT_BLOCK(cur->bc_bufs[lev]);
- if ((lr & XFS_BTCUR_LEFTRA) && be64_to_cpu(b->bb_leftsib) != NULLDFSBNO) {
- xfs_btree_reada_bufl(cur->bc_mp, be64_to_cpu(b->bb_leftsib), 1);
- rval++;
- }
- if ((lr & XFS_BTCUR_RIGHTRA) && be64_to_cpu(b->bb_rightsib) != NULLDFSBNO) {
- xfs_btree_reada_bufl(cur->bc_mp, be64_to_cpu(b->bb_rightsib), 1);
- rval++;
- }
- break;
- case XFS_BTNUM_INO:
- i = XFS_BUF_TO_INOBT_BLOCK(cur->bc_bufs[lev]);
- if ((lr & XFS_BTCUR_LEFTRA) && be32_to_cpu(i->bb_leftsib) != NULLAGBLOCK) {
- xfs_btree_reada_bufs(cur->bc_mp, cur->bc_private.a.agno,
- be32_to_cpu(i->bb_leftsib), 1);
- rval++;
- }
- if ((lr & XFS_BTCUR_RIGHTRA) && be32_to_cpu(i->bb_rightsib) != NULLAGBLOCK) {
- xfs_btree_reada_bufs(cur->bc_mp, cur->bc_private.a.agno,
- be32_to_cpu(i->bb_rightsib), 1);
- rval++;
- }
- break;
- default:
- ASSERT(0);
- }
- return rval;
+ block = XFS_BUF_TO_BLOCK(cur->bc_bufs[lev]);
+
+ if (cur->bc_flags & XFS_BTREE_LONG_PTRS)
+ return xfs_btree_readahead_lblock(cur, lr, block);
+ return xfs_btree_readahead_sblock(cur, lr, block);