C++ (Cpp) XFS_BMBT_REC_ADDR Examples

Example #1

File: frag.c Project: Fleurer/xfsprogs

static void
scanfunc_bmap(
	struct xfs_btree_block	*block,
	int			level,
	extmap_t		**extmapp,
	typnm_t			btype)
{
	int			i;
	xfs_bmbt_ptr_t		*pp;
	xfs_bmbt_rec_t		*rp;
	int			nrecs;

	nrecs = be16_to_cpu(block->bb_numrecs);

	if (level == 0) {
		if (nrecs > mp->m_bmap_dmxr[0]) {
			dbprintf(_("invalid numrecs (%u) in %s block\n"),
				   nrecs, typtab[btype].name);
			return;
		}
		rp = XFS_BMBT_REC_ADDR(mp, block, 1);
		process_bmbt_reclist(rp, nrecs, extmapp);
		return;
	}

	if (nrecs > mp->m_bmap_dmxr[1]) {
		dbprintf(_("invalid numrecs (%u) in %s block\n"),
			   nrecs, typtab[btype].name);
		return;
	}
	pp = XFS_BMBT_PTR_ADDR(mp, block, 1, mp->m_bmap_dmxr[0]);
	for (i = 0; i < nrecs; i++)
		scan_lbtree(be64_to_cpu(pp[i]), level, scanfunc_bmap, extmapp, 
									btype);
}

Example #2

File: xfs_bmap_util.c Project: Astralix/mainline-dss11

/*
 * Count leaf blocks given a range of extent records originally
 * in btree format.
 */
STATIC void
xfs_bmap_disk_count_leaves(
	struct xfs_mount	*mp,
	struct xfs_btree_block	*block,
	int			numrecs,
	int			*count)
{
	int		b;
	xfs_bmbt_rec_t	*frp;

	for (b = 1; b <= numrecs; b++) {
		frp = XFS_BMBT_REC_ADDR(mp, block, b);
		*count += xfs_bmbt_disk_get_blockcount(frp);
	}
}

Example #3

File: bmap.c Project: brkt/fuse-xfs

void
bmap(
	xfs_dfiloff_t		offset,
	xfs_dfilblks_t		len,
	int			whichfork,
	int			*nexp,
	bmap_ext_t		*bep)
{
	struct xfs_btree_block	*block;
	xfs_fsblock_t		bno;
	xfs_dfiloff_t		curoffset;
	xfs_dinode_t		*dip;
	xfs_dfiloff_t		eoffset;
	xfs_bmbt_rec_64_t	*ep;
	xfs_dinode_fmt_t	fmt;
	int			fsize;
	xfs_bmbt_key_t		*kp;
	int			n;
	int			nex;
	xfs_fsblock_t		nextbno;
	int			nextents;
	xfs_bmbt_ptr_t		*pp;
	xfs_bmdr_block_t	*rblock;
	typnm_t			typ;
	xfs_bmbt_rec_64_t	*xp;

	push_cur();
	set_cur_inode(iocur_top->ino);
	nex = *nexp;
	*nexp = 0;
	ASSERT(nex > 0);
	dip = iocur_top->data;
	n = 0;
	eoffset = offset + len - 1;
	curoffset = offset;
	fmt = (xfs_dinode_fmt_t)XFS_DFORK_FORMAT(dip, whichfork);
	typ = whichfork == XFS_DATA_FORK ? TYP_BMAPBTD : TYP_BMAPBTA;
	ASSERT(typtab[typ].typnm == typ);
	ASSERT(fmt == XFS_DINODE_FMT_LOCAL || fmt == XFS_DINODE_FMT_EXTENTS ||
		fmt == XFS_DINODE_FMT_BTREE);
	if (fmt == XFS_DINODE_FMT_EXTENTS) {
		nextents = XFS_DFORK_NEXTENTS(dip, whichfork);
		xp = (xfs_bmbt_rec_64_t *)XFS_DFORK_PTR(dip, whichfork);
		for (ep = xp; ep < &xp[nextents] && n < nex; ep++) {
			if (!bmap_one_extent(ep, &curoffset, eoffset, &n, bep))
				break;
		}
	} else if (fmt == XFS_DINODE_FMT_BTREE) {
		push_cur();
		bno = NULLFSBLOCK;
		rblock = (xfs_bmdr_block_t *)XFS_DFORK_PTR(dip, whichfork);
		fsize = XFS_DFORK_SIZE(dip, mp, whichfork);
		pp = XFS_BMDR_PTR_ADDR(rblock, 1, xfs_bmdr_maxrecs(mp, fsize, 0));
		kp = XFS_BMDR_KEY_ADDR(rblock, 1);
		bno = select_child(curoffset, kp, pp, 
					be16_to_cpu(rblock->bb_numrecs));
		for (;;) {
			set_cur(&typtab[typ], XFS_FSB_TO_DADDR(mp, bno),
				blkbb, DB_RING_IGN, NULL);
			block = (struct xfs_btree_block *)iocur_top->data;
			if (be16_to_cpu(block->bb_level) == 0)
				break;
			pp = XFS_BMDR_PTR_ADDR(block, 1,
				xfs_bmbt_maxrecs(mp, mp->m_sb.sb_blocksize, 0));
			kp = XFS_BMDR_KEY_ADDR(block, 1);
			bno = select_child(curoffset, kp, pp,
					be16_to_cpu(block->bb_numrecs));
		}
		for (;;) {
			nextbno = be64_to_cpu(block->bb_u.l.bb_rightsib);
			nextents = be16_to_cpu(block->bb_numrecs);
			xp = (xfs_bmbt_rec_64_t *)
				XFS_BMBT_REC_ADDR(mp, block, 1);
			for (ep = xp; ep < &xp[nextents] && n < nex; ep++) {
				if (!bmap_one_extent(ep, &curoffset, eoffset,
						&n, bep)) {
					nextbno = NULLFSBLOCK;
					break;
				}
			}
			bno = nextbno;
			if (bno == NULLFSBLOCK)
				break;
			set_cur(&typtab[typ], XFS_FSB_TO_DADDR(mp, bno),
				blkbb, DB_RING_IGN, NULL);
			block = (struct xfs_btree_block *)iocur_top->data;
		}
		pop_cur();
	}
	pop_cur();
	*nexp = n;
}