/* Cross-reference a rmap against the refcount btree. */
STATIC void
xchk_rmapbt_xref_refc(
struct xfs_scrub *sc,
struct xfs_rmap_irec *irec)
{
xfs_agblock_t fbno;
xfs_extlen_t flen;
bool non_inode;
bool is_bmbt;
bool is_attr;
bool is_unwritten;
int error;
if (!sc->sa.refc_cur || xchk_skip_xref(sc->sm))
return;
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 this is shared, must be a data fork extent. */
error = xfs_refcount_find_shared(sc->sa.refc_cur, irec->rm_startblock,
irec->rm_blockcount, &fbno, &flen, false);
if (!xchk_should_check_xref(sc, &error, &sc->sa.refc_cur))
return;
if (flen != 0 && (non_inode || is_attr || is_bmbt || is_unwritten))
xchk_btree_xref_set_corrupt(sc, sc->sa.refc_cur, 0);
}
/* Cross reference the inode fields with the forks. */
STATIC void
xchk_inode_xref_bmap(
struct xfs_scrub *sc,
struct xfs_dinode *dip)
{
xfs_extnum_t nextents;
xfs_filblks_t count;
xfs_filblks_t acount;
int error;
if (xchk_skip_xref(sc->sm))
return;
/* Walk all the extents to check nextents/naextents/nblocks. */
error = xfs_bmap_count_blocks(sc->tp, sc->ip, XFS_DATA_FORK,
&nextents, &count);
if (!xchk_should_check_xref(sc, &error, NULL))
return;
if (nextents < be32_to_cpu(dip->di_nextents))
xchk_ino_xref_set_corrupt(sc, sc->ip->i_ino);
error = xfs_bmap_count_blocks(sc->tp, sc->ip, XFS_ATTR_FORK,
&nextents, &acount);
if (!xchk_should_check_xref(sc, &error, NULL))
return;
if (nextents != be16_to_cpu(dip->di_anextents))
xchk_ino_xref_set_corrupt(sc, sc->ip->i_ino);
/* Check nblocks against the inode. */
if (count + acount != be64_to_cpu(dip->di_nblocks))
xchk_ino_xref_set_corrupt(sc, sc->ip->i_ino);
}
/* xref check that the extent has no reverse mapping at all */
void
xchk_xref_has_no_owner(
struct xfs_scrub *sc,
xfs_agblock_t bno,
xfs_extlen_t len)
{
bool has_rmap;
int error;
if (!sc->sa.rmap_cur || xchk_skip_xref(sc->sm))
return;
error = xfs_rmap_has_record(sc->sa.rmap_cur, bno, len, &has_rmap);
if (!xchk_should_check_xref(sc, &error, &sc->sa.rmap_cur))
return;
if (has_rmap)
xchk_btree_xref_set_corrupt(sc, sc->sa.rmap_cur, 0);
}
/*
* Make sure the finobt doesn't think this inode is free.
* We don't have to check the inobt ourselves because we got the inode via
* IGET_UNTRUSTED, which checks the inobt for us.
*/
static void
xchk_inode_xref_finobt(
struct xfs_scrub *sc,
xfs_ino_t ino)
{
struct xfs_inobt_rec_incore rec;
xfs_agino_t agino;
int has_record;
int error;
if (!sc->sa.fino_cur || xchk_skip_xref(sc->sm))
return;
agino = XFS_INO_TO_AGINO(sc->mp, ino);
/*
* Try to get the finobt record. If we can't get it, then we're
* in good shape.
*/
error = xfs_inobt_lookup(sc->sa.fino_cur, agino, XFS_LOOKUP_LE,
&has_record);
if (!xchk_should_check_xref(sc, &error, &sc->sa.fino_cur) ||
!has_record)
return;
error = xfs_inobt_get_rec(sc->sa.fino_cur, &rec, &has_record);
if (!xchk_should_check_xref(sc, &error, &sc->sa.fino_cur) ||
!has_record)
return;
/*
* Otherwise, make sure this record either doesn't cover this inode,
* or that it does but it's marked present.
*/
if (rec.ir_startino > agino ||
rec.ir_startino + XFS_INODES_PER_CHUNK <= agino)
return;
if (rec.ir_free & XFS_INOBT_MASK(agino - rec.ir_startino))
xchk_btree_xref_set_corrupt(sc, sc->sa.fino_cur, 0);
}
/* xref check that the extent is owned by a given owner */
static inline void
xchk_xref_check_owner(
struct xfs_scrub *sc,
xfs_agblock_t bno,
xfs_extlen_t len,
const struct xfs_owner_info *oinfo,
bool should_have_rmap)
{
bool has_rmap;
int error;
if (!sc->sa.rmap_cur || xchk_skip_xref(sc->sm))
return;
error = xfs_rmap_record_exists(sc->sa.rmap_cur, bno, len, oinfo,
&has_rmap);
if (!xchk_should_check_xref(sc, &error, &sc->sa.rmap_cur))
return;
if (has_rmap != should_have_rmap)
xchk_btree_xref_set_corrupt(sc, sc->sa.rmap_cur, 0);
}
