During metadata btree scrub, we should cross-reference with the
reference counts.
Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
---
libxfs/xfs_refcount.c | 19 +++++++++++++++++++
libxfs/xfs_refcount.h | 3 +++
2 files changed, 22 insertions(+)
diff --git a/libxfs/xfs_refcount.c b/libxfs/xfs_refcount.c
index 0508ec3..124d5c0 100644
--- a/libxfs/xfs_refcount.c
+++ b/libxfs/xfs_refcount.c
@@ -1695,3 +1695,22 @@ xfs_refcount_recover_cow_leftovers(
xfs_trans_cancel(tp);
goto out_free;
}
+
+/* Is there a record covering a given extent? */
+int
+xfs_refcount_has_record(
+ struct xfs_btree_cur *cur,
+ xfs_agblock_t bno,
+ xfs_extlen_t len,
+ bool *exists)
+{
+ union xfs_btree_irec low;
+ union xfs_btree_irec high;
+
+ memset(&low, 0, sizeof(low));
+ low.rc.rc_startblock = bno;
+ memset(&high, 0xFF, sizeof(high));
+ high.rc.rc_startblock = bno + len - 1;
+
+ return xfs_btree_has_record(cur, &low, &high, exists);
+}
diff --git a/libxfs/xfs_refcount.h b/libxfs/xfs_refcount.h
index 098dc66..78cb142 100644
--- a/libxfs/xfs_refcount.h
+++ b/libxfs/xfs_refcount.h
@@ -67,4 +67,7 @@ extern int xfs_refcount_free_cow_extent(struct xfs_mount *mp,
extern int xfs_refcount_recover_cow_leftovers(struct xfs_mount *mp,
xfs_agnumber_t agno);
+extern int xfs_refcount_has_record(struct xfs_btree_cur *cur,
+ xfs_agblock_t bno, xfs_extlen_t len, bool *exists);
+
#endif /* __XFS_REFCOUNT_H__ */
--
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