From 1048d0e209ca4ad387485e6aeed07dd5870b0f36 Mon Sep 17 00:00:00 2001 From: "Darrick J. Wong" Date: Mon, 26 Feb 2018 22:43:18 -0600 Subject: [PATCH] xfs: add scrub cross-referencing helpers for the refcount btrees Source kernel commit: 49db55eca5665e32c9d3e67a7d5694bcc6c274de Add a couple of functions to the refcount btrees that will be used to cross-reference metadata against the refcountbt. Signed-off-by: Darrick J. Wong Reviewed-by: Dave Chinner Signed-off-by: Eric Sandeen --- 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 2a57f321c..24e68a1dd 100644 --- a/libxfs/xfs_refcount.c +++ b/libxfs/xfs_refcount.c @@ -1695,3 +1695,22 @@ out_cursor: xfs_trans_brelse(tp, agbp); goto out_trans; } + +/* 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 eafb9d1f3..2a731ac68 100644 --- a/libxfs/xfs_refcount.h +++ b/libxfs/xfs_refcount.h @@ -83,4 +83,7 @@ static inline xfs_fileoff_t xfs_refcount_max_unmap(int log_res) return (log_res * 3 / 4) / XFS_REFCOUNT_ITEM_OVERHEAD; } +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__ */ -- 2.47.2