Beispiel #1
0
/* Calculate the first and last possible inode number in an AG. */
void
xfs_agino_range(
	struct xfs_mount	*mp,
	xfs_agnumber_t		agno,
	xfs_agino_t		*first,
	xfs_agino_t		*last)
{
	xfs_agblock_t		bno;
	xfs_agblock_t		eoag;

	eoag = xfs_ag_block_count(mp, agno);

	/*
	 * Calculate the first inode, which will be in the first
	 * cluster-aligned block after the AGFL.
	 */
	bno = round_up(XFS_AGFL_BLOCK(mp) + 1, mp->m_cluster_align);
	*first = XFS_AGB_TO_AGINO(mp, bno);

	/*
	 * Calculate the last inode, which will be at the end of the
	 * last (aligned) cluster that can be allocated in the AG.
	 */
	bno = round_down(eoag, mp->m_cluster_align);
	*last = XFS_AGB_TO_AGINO(mp, bno) - 1;
}
Beispiel #2
0
/*
 * Verify that an AG block number pointer neither points outside the AG
 * nor points at static metadata.
 */
bool
xfs_verify_agbno(
	struct xfs_mount	*mp,
	xfs_agnumber_t		agno,
	xfs_agblock_t		agbno)
{
	xfs_agblock_t		eoag;

	eoag = xfs_ag_block_count(mp, agno);
	if (agbno >= eoag)
		return false;
	if (agbno <= XFS_AGFL_BLOCK(mp))
		return false;
	return true;
}
Beispiel #3
0
xfs_agblock_t
xfs_agfl_block(xfs_mount_t *mp)
{
    return XFS_AGFL_BLOCK(mp);
}
Beispiel #4
0
/* Scrub an rmapbt record. */
STATIC int
xchk_rmapbt_rec(
	struct xchk_btree	*bs,
	union xfs_btree_rec	*rec)
{
	struct xfs_mount	*mp = bs->cur->bc_mp;
	struct xfs_rmap_irec	irec;
	xfs_agnumber_t		agno = bs->cur->bc_private.a.agno;
	bool			non_inode;
	bool			is_unwritten;
	bool			is_bmbt;
	bool			is_attr;
	int			error;

	error = xfs_rmap_btrec_to_irec(rec, &irec);
	if (!xchk_btree_process_error(bs->sc, bs->cur, 0, &error))
		goto out;

	/* Check extent. */
	if (irec.rm_startblock + irec.rm_blockcount <= irec.rm_startblock)
		xchk_btree_set_corrupt(bs->sc, bs->cur, 0);

	if (irec.rm_owner == XFS_RMAP_OWN_FS) {
		/*
		 * xfs_verify_agbno returns false for static fs metadata.
		 * Since that only exists at the start of the AG, validate
		 * that by hand.
		 */
		if (irec.rm_startblock != 0 ||
		    irec.rm_blockcount != XFS_AGFL_BLOCK(mp) + 1)
			xchk_btree_set_corrupt(bs->sc, bs->cur, 0);
	} else {
		/*
		 * Otherwise we must point somewhere past the static metadata
		 * but before the end of the FS.  Run the regular check.
		 */
		if (!xfs_verify_agbno(mp, agno, irec.rm_startblock) ||
		    !xfs_verify_agbno(mp, agno, irec.rm_startblock +
				irec.rm_blockcount - 1))
			xchk_btree_set_corrupt(bs->sc, bs->cur, 0);
	}

	/* Check flags. */
	non_inode = XFS_RMAP_NON_INODE_OWNER(irec.rm_owner);
	is_bmbt = irec.rm_flags & XFS_RMAP_BMBT_BLOCK;
	is_attr = irec.rm_flags & XFS_RMAP_ATTR_FORK;
	is_unwritten = irec.rm_flags & XFS_RMAP_UNWRITTEN;

	if (is_bmbt && irec.rm_offset != 0)
		xchk_btree_set_corrupt(bs->sc, bs->cur, 0);

	if (non_inode && irec.rm_offset != 0)
		xchk_btree_set_corrupt(bs->sc, bs->cur, 0);

	if (is_unwritten && (is_bmbt || non_inode || is_attr))
		xchk_btree_set_corrupt(bs->sc, bs->cur, 0);

	if (non_inode && (is_bmbt || is_unwritten || is_attr))
		xchk_btree_set_corrupt(bs->sc, bs->cur, 0);

	if (!non_inode) {
		if (!xfs_verify_ino(mp, irec.rm_owner))
			xchk_btree_set_corrupt(bs->sc, bs->cur, 0);
	} else {
		/* Non-inode owner within the magic values? */
		if (irec.rm_owner <= XFS_RMAP_OWN_MIN ||
		    irec.rm_owner > XFS_RMAP_OWN_FS)
			xchk_btree_set_corrupt(bs->sc, bs->cur, 0);
	}

	xchk_rmapbt_xref(bs->sc, &irec);
out:
	return error;
}