[PATCH 20/24] xfs: cross-reference refcount btree during scrub
From: Darrick J. Wong <hidden>
Date: 2016-08-25 23:57:35
Subsystem:
the rest · Maintainer:
Linus Torvalds
During metadata btree scrub, we should cross-reference with the reference counts. Signed-off-by: Darrick J. Wong <redacted> --- 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 7d3735f..2d747ba 100644
--- a/libxfs/xfs_refcount.c
+++ b/libxfs/xfs_refcount.c@@ -1534,3 +1534,22 @@ xfs_refcount_free_cow_extent( return __xfs_refcount_add(mp, dfops, XFS_REFCOUNT_FREE_COW, fsb, len); } + +/* 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 105c246..a00400f 100644
--- a/libxfs/xfs_refcount.h
+++ b/libxfs/xfs_refcount.h@@ -64,4 +64,7 @@ extern int xfs_refcount_free_cow_extent(struct xfs_mount *mp, struct xfs_defer_ops *dfops, xfs_fsblock_t fsb, xfs_extlen_t len); +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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