Ensure that none of the AG btree records overlap the AG sb/agf/agfl/agi
headers except for the XFS_RMAP_OWN_FS rmap.
Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
---
fs/xfs/repair/agheader.c | 27 +++++++++++++++++++++++++++
fs/xfs/repair/alloc.c | 4 ++++
fs/xfs/repair/bmap.c | 5 +++++
fs/xfs/repair/common.h | 2 ++
fs/xfs/repair/ialloc.c | 4 ++++
fs/xfs/repair/refcount.c | 4 ++++
fs/xfs/repair/rmap.c | 5 +++++
7 files changed, 51 insertions(+)
diff --git a/fs/xfs/repair/agheader.c b/fs/xfs/repair/agheader.c
index b351885..3276e88 100644
--- a/fs/xfs/repair/agheader.c
+++ b/fs/xfs/repair/agheader.c
@@ -115,6 +115,30 @@ xfs_scrub_walk_agfl(
return 0;
}
+/* Does this AG extent cover the AG headers? */
+bool
+xfs_scrub_extent_covers_ag_head(
+ struct xfs_mount *mp,
+ xfs_agblock_t agbno,
+ xfs_extlen_t len)
+{
+ xfs_agblock_t bno;
+
+ bno = XFS_SB_BLOCK(mp);
+ if (bno >= agbno && bno < agbno + len)
+ return true;
+ bno = XFS_AGF_BLOCK(mp);
+ if (bno >= agbno && bno < agbno + len)
+ return true;
+ bno = XFS_AGFL_BLOCK(mp);
+ if (bno >= agbno && bno < agbno + len)
+ return true;
+ bno = XFS_AGI_BLOCK(mp);
+ if (bno >= agbno && bno < agbno + len)
+ return true;
+ return false;
+}
+
/* Superblock */
#define XFS_SCRUB_SB_CHECK(fs_ok) \
@@ -470,6 +494,9 @@ xfs_scrub_agfl_block(
XFS_SCRUB_AGFL_CHECK(agbno < mp->m_sb.sb_agblocks);
XFS_SCRUB_AGFL_CHECK(agbno < sagfl->eoag);
+ /* Cross-reference with the AG headers. */
+ XFS_SCRUB_AGFL_CHECK(!xfs_scrub_extent_covers_ag_head(mp, agbno, 1));
+
/* Cross-reference with the bnobt. */
if (sc->sa.bno_cur) {
err2 = xfs_alloc_has_record(sc->sa.bno_cur, agbno,
diff --git a/fs/xfs/repair/alloc.c b/fs/xfs/repair/alloc.c
index 7cc15b8..c30e048 100644
--- a/fs/xfs/repair/alloc.c
+++ b/fs/xfs/repair/alloc.c
@@ -91,6 +91,10 @@ xfs_scrub_allocbt_helper(
if (error)
goto out;
+ /* Make sure we don't cover the AG headers. */
+ XFS_SCRUB_BTREC_CHECK(bs,
+ !xfs_scrub_extent_covers_ag_head(mp, bno, len));
+
psa = &bs->sc->sa;
/*
* Ensure there's a corresponding cntbt/bnobt record matching
diff --git a/fs/xfs/repair/bmap.c b/fs/xfs/repair/bmap.c
index 5cb89f7..ffb0112 100644
--- a/fs/xfs/repair/bmap.c
+++ b/fs/xfs/repair/bmap.c
@@ -144,6 +144,11 @@ xfs_scrub_bmap_extent(
XFS_SCRUB_BMAP_OP_ERROR_GOTO(out);
}
+ /* Make sure we don't cover the AG headers. */
+ if (!info->is_rt)
+ XFS_SCRUB_BMAP_CHECK(!xfs_scrub_extent_covers_ag_head(mp,
+ bno, irec->br_blockcount));
+
/* Cross-reference with the bnobt. */
if (sa.bno_cur) {
err2 = xfs_alloc_has_record(sa.bno_cur, bno,
diff --git a/fs/xfs/repair/common.h b/fs/xfs/repair/common.h
index bff1b2c..3c110b7 100644
--- a/fs/xfs/repair/common.h
+++ b/fs/xfs/repair/common.h
@@ -208,6 +208,8 @@ int xfs_scrub_walk_agfl(struct xfs_scrub_context *sc,
void *priv);
int xfs_scrub_ag_btcur_init(struct xfs_scrub_context *sc,
struct xfs_scrub_ag *sa);
+bool xfs_scrub_extent_covers_ag_head(struct xfs_mount *mp, xfs_agblock_t agbno,
+ xfs_extlen_t len);
/* Setup functions */
diff --git a/fs/xfs/repair/ialloc.c b/fs/xfs/repair/ialloc.c
index 3c45fe6..e677167 100644
--- a/fs/xfs/repair/ialloc.c
+++ b/fs/xfs/repair/ialloc.c
@@ -108,6 +108,10 @@ xfs_scrub_iallocbt_chunk(
goto out;
}
+ /* Make sure we don't cover the AG headers. */
+ XFS_SCRUB_BTREC_CHECK(bs,
+ !xfs_scrub_extent_covers_ag_head(mp, bno, len));
+
psa = &bs->sc->sa;
/* Cross-reference with the bnobt. */
if (psa->bno_cur) {
diff --git a/fs/xfs/repair/refcount.c b/fs/xfs/repair/refcount.c
index 0cf82600..bb1d4ee 100644
--- a/fs/xfs/repair/refcount.c
+++ b/fs/xfs/repair/refcount.c
@@ -76,6 +76,10 @@ xfs_scrub_refcountbt_helper(
if (error)
goto out;
+ /* Make sure we don't cover the AG headers. */
+ XFS_SCRUB_BTREC_CHECK(bs, !xfs_scrub_extent_covers_ag_head(mp,
+ irec.rc_startblock, irec.rc_blockcount));
+
psa = &bs->sc->sa;
/* Cross-reference with the bnobt. */
if (psa->bno_cur) {
diff --git a/fs/xfs/repair/rmap.c b/fs/xfs/repair/rmap.c
index c04cfb6..5b26166 100644
--- a/fs/xfs/repair/rmap.c
+++ b/fs/xfs/repair/rmap.c
@@ -106,6 +106,11 @@ xfs_scrub_rmapbt_helper(
if (error)
goto out;
+ /* Make sure only the AG header owner maps to the AG header. */
+ XFS_SCRUB_BTREC_CHECK(bs, irec.rm_owner == XFS_RMAP_OWN_FS ||
+ !xfs_scrub_extent_covers_ag_head(mp, irec.rm_startblock,
+ irec.rm_blockcount));
+
psa = &bs->sc->sa;
/* check there's no record in freesp btrees */
if (psa->bno_cur) {
--
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