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xfs: stricter btree height checking when scanning for btree roots

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When we're scanning for btree roots to rebuild the AG headers, make sure
that the proposed tree does not exceed the maximum height for that btree
type (and not just XFS_BTREE_MAXLEVELS).

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Chandan Babu R <chandan.babu@oracle.com>
This commit is contained in:
Darrick J. Wong 2021-09-16 12:21:56 -07:00
parent f4585e8234
commit 1ba6fd34ca
2 changed files with 10 additions and 1 deletions
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8
fs/xfs/scrub/agheader_repair.c
View File

@ -122,7 +122,7 @@ xrep_check_btree_root(
xfs_agnumber_t agno = sc->sm->sm_agno;
return xfs_verify_agbno(mp, agno, fab->root) &&
fab->height <= XFS_BTREE_MAXLEVELS;
fab->height <= fab->maxlevels;
}
/*
@ -339,18 +339,22 @@ xrep_agf(
[XREP_AGF_BNOBT] = {
.rmap_owner = XFS_RMAP_OWN_AG,
.buf_ops = &xfs_bnobt_buf_ops,
.maxlevels = sc->mp->m_ag_maxlevels,
},
[XREP_AGF_CNTBT] = {
.rmap_owner = XFS_RMAP_OWN_AG,
.buf_ops = &xfs_cntbt_buf_ops,
.maxlevels = sc->mp->m_ag_maxlevels,
},
[XREP_AGF_RMAPBT] = {
.rmap_owner = XFS_RMAP_OWN_AG,
.buf_ops = &xfs_rmapbt_buf_ops,
.maxlevels = sc->mp->m_rmap_maxlevels,
},
[XREP_AGF_REFCOUNTBT] = {
.rmap_owner = XFS_RMAP_OWN_REFC,
.buf_ops = &xfs_refcountbt_buf_ops,
.maxlevels = sc->mp->m_refc_maxlevels,
},
[XREP_AGF_END] = {
.buf_ops = NULL,
@ -881,10 +885,12 @@ xrep_agi(
[XREP_AGI_INOBT] = {
.rmap_owner = XFS_RMAP_OWN_INOBT,
.buf_ops = &xfs_inobt_buf_ops,
.maxlevels = M_IGEO(sc->mp)->inobt_maxlevels,
},
[XREP_AGI_FINOBT] = {
.rmap_owner = XFS_RMAP_OWN_INOBT,
.buf_ops = &xfs_finobt_buf_ops,
.maxlevels = M_IGEO(sc->mp)->inobt_maxlevels,
},
[XREP_AGI_END] = {
.buf_ops = NULL

3
fs/xfs/scrub/repair.h
View File

@ -44,6 +44,9 @@ struct xrep_find_ag_btree {
/* in: buffer ops */
const struct xfs_buf_ops *buf_ops;
/* in: maximum btree height */
unsigned int maxlevels;
/* out: the highest btree block found and the tree height */
xfs_agblock_t root;
unsigned int height;