/*
* Check that an inode's allocation status matches ir_free in the inobt
* record. First we try querying the in-core inode state, and if the inode
* isn't loaded we examine the on-disk inode directly.
*
* Since there can be 1:M and M:1 mappings between inobt records and inode
* clusters, we pass in the inode location information as an inobt record;
* the index of an inode cluster within the inobt record (as well as the
* cluster buffer itself); and the index of the inode within the cluster.
*
* @irec is the inobt record.
* @irec_ino is the inode offset from the start of the record.
* @dip is the on-disk inode.
*/
STATIC int
xchk_iallocbt_check_cluster_ifree(
struct xchk_btree *bs,
struct xfs_inobt_rec_incore *irec,
unsigned int irec_ino,
struct xfs_dinode *dip)
{
struct xfs_mount *mp = bs->cur->bc_mp;
xfs_ino_t fsino;
xfs_agino_t agino;
bool irec_free;
bool ino_inuse;
bool freemask_ok;
int error = 0;
if (xchk_should_terminate(bs->sc, &error))
return error;
/*
* Given an inobt record and the offset of an inode from the start of
* the record, compute which fs inode we're talking about.
*/
agino = irec->ir_startino + irec_ino;
fsino = XFS_AGINO_TO_INO(mp, bs->cur->bc_private.a.agno, agino);
irec_free = (irec->ir_free & XFS_INOBT_MASK(irec_ino));
if (be16_to_cpu(dip->di_magic) != XFS_DINODE_MAGIC ||
(dip->di_version >= 3 && be64_to_cpu(dip->di_ino) != fsino)) {
xchk_btree_set_corrupt(bs->sc, bs->cur, 0);
goto out;
}
error = xfs_icache_inode_is_allocated(mp, bs->cur->bc_tp, fsino,
&ino_inuse);
if (error == -ENODATA) {
/* Not cached, just read the disk buffer */
freemask_ok = irec_free ^ !!(dip->di_mode);
if (!bs->sc->try_harder && !freemask_ok)
return -EDEADLOCK;
} else if (error < 0) {
/*
* Inode is only half assembled, or there was an IO error,
* or the verifier failed, so don't bother trying to check.
* The inode scrubber can deal with this.
*/
goto out;
} else {
/* Inode is all there. */
freemask_ok = irec_free ^ ino_inuse;
}
if (!freemask_ok)
xchk_btree_set_corrupt(bs->sc, bs->cur, 0);
out:
return 0;
}
/* Check a particular inode with ir_free. */
STATIC int
xfs_scrub_iallocbt_check_cluster_freemask(
struct xfs_scrub_btree *bs,
xfs_ino_t fsino,
xfs_agino_t chunkino,
xfs_agino_t clusterino,
struct xfs_inobt_rec_incore *irec,
struct xfs_buf *bp)
{
struct xfs_dinode *dip;
struct xfs_mount *mp = bs->cur->bc_mp;
bool inode_is_free = false;
bool freemask_ok;
bool inuse;
int error = 0;
if (xfs_scrub_should_terminate(bs->sc, &error))
return error;
dip = xfs_buf_offset(bp, clusterino * mp->m_sb.sb_inodesize);
if (be16_to_cpu(dip->di_magic) != XFS_DINODE_MAGIC ||
(dip->di_version >= 3 &&
be64_to_cpu(dip->di_ino) != fsino + clusterino)) {
xfs_scrub_btree_set_corrupt(bs->sc, bs->cur, 0);
goto out;
}
if (irec->ir_free & XFS_INOBT_MASK(chunkino + clusterino))
inode_is_free = true;
error = xfs_icache_inode_is_allocated(mp, bs->cur->bc_tp,
fsino + clusterino, &inuse);
if (error == -ENODATA) {
/* Not cached, just read the disk buffer */
freemask_ok = inode_is_free ^ !!(dip->di_mode);
if (!bs->sc->try_harder && !freemask_ok)
return -EDEADLOCK;
} else if (error < 0) {
/*
* Inode is only half assembled, or there was an IO error,
* or the verifier failed, so don't bother trying to check.
* The inode scrubber can deal with this.
*/
goto out;
} else {
/* Inode is all there. */
freemask_ok = inode_is_free ^ inuse;
}
if (!freemask_ok)
xfs_scrub_btree_set_corrupt(bs->sc, bs->cur, 0);
out:
return 0;
}
