/* * Count fsblocks of the given fork. */ int /* error */ xfs_bmap_count_blocks( xfs_trans_t *tp, /* transaction pointer */ xfs_inode_t *ip, /* incore inode */ int whichfork, /* data or attr fork */ int *count) /* out: count of blocks */ { struct xfs_btree_block *block; /* current btree block */ xfs_fsblock_t bno; /* block # of "block" */ xfs_ifork_t *ifp; /* fork structure */ int level; /* btree level, for checking */ xfs_mount_t *mp; /* file system mount structure */ __be64 *pp; /* pointer to block address */ bno = NULLFSBLOCK; mp = ip->i_mount; ifp = XFS_IFORK_PTR(ip, whichfork); if ( XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS ) { xfs_bmap_count_leaves(ifp, 0, ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t), count); return 0; } /* * Root level must use BMAP_BROOT_PTR_ADDR macro to get ptr out. */ block = ifp->if_broot; level = be16_to_cpu(block->bb_level); ASSERT(level > 0); pp = XFS_BMAP_BROOT_PTR_ADDR(mp, block, 1, ifp->if_broot_bytes); bno = be64_to_cpu(*pp); ASSERT(bno != NULLDFSBNO); ASSERT(XFS_FSB_TO_AGNO(mp, bno) < mp->m_sb.sb_agcount); ASSERT(XFS_FSB_TO_AGBNO(mp, bno) < mp->m_sb.sb_agblocks); if (unlikely(xfs_bmap_count_tree(mp, tp, ifp, bno, level, count) < 0)) { XFS_ERROR_REPORT("xfs_bmap_count_blocks(2)", XFS_ERRLEVEL_LOW, mp); return XFS_ERROR(EFSCORRUPTED); } return 0; }
xfs_bmbt_ptr_t * xfs_bmap_broot_ptr_addr(xfs_bmbt_block_t *bb, int i, int sz) { return XFS_BMAP_BROOT_PTR_ADDR(bb, i, sz); }