/* 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;
}
/*
* 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;
}
xfs_agblock_t
xfs_agfl_block(xfs_mount_t *mp)
{
return XFS_AGFL_BLOCK(mp);
}
/* 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;
}