Reconstruct the refcount data from the rmap btree.
Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
---
libxfs/xfs_btree.c | 21 +++++++++++++++++++++
libxfs/xfs_btree.h | 1 +
libxfs/xfs_refcount.c | 19 ++++++++++++++++++-
libxfs/xfs_refcount.h | 4 ++++
4 files changed, 44 insertions(+), 1 deletion(-)
diff --git a/libxfs/xfs_btree.c b/libxfs/xfs_btree.c
index 0c7d549..d1a5347 100644
--- a/libxfs/xfs_btree.c
+++ b/libxfs/xfs_btree.c
@@ -4891,3 +4891,24 @@ xfs_btree_has_record(
return 0;
}
+
+/* Are there more records in this btree? */
+bool
+xfs_btree_has_more_records(
+ struct xfs_btree_cur *cur)
+{
+ struct xfs_btree_block *block;
+ struct xfs_buf *bp;
+
+ block = xfs_btree_get_block(cur, 0, &bp);
+
+ /* There are still records in this block. */
+ if (cur->bc_ptrs[0] < xfs_btree_get_numrecs(block))
+ return true;
+
+ /* There are more record blocks. */
+ if (cur->bc_flags & XFS_BTREE_LONG_PTRS)
+ return block->bb_u.l.bb_rightsib != cpu_to_be64(NULLFSBLOCK);
+ else
+ return block->bb_u.s.bb_rightsib != cpu_to_be32(NULLAGBLOCK);
+}
diff --git a/libxfs/xfs_btree.h b/libxfs/xfs_btree.h
index 52714f0..ace0bb0 100644
--- a/libxfs/xfs_btree.h
+++ b/libxfs/xfs_btree.h
@@ -551,5 +551,6 @@ struct xfs_btree_block *xfs_btree_get_block(struct xfs_btree_cur *cur,
int level, struct xfs_buf **bpp);
int xfs_btree_has_record(struct xfs_btree_cur *cur, union xfs_btree_irec *low,
union xfs_btree_irec *high, bool *exists);
+bool xfs_btree_has_more_records(struct xfs_btree_cur *);
#endif /* __XFS_BTREE_H__ */
diff --git a/libxfs/xfs_refcount.c b/libxfs/xfs_refcount.c
index be0eab3..088f850 100644
--- a/libxfs/xfs_refcount.c
+++ b/libxfs/xfs_refcount.c
@@ -86,6 +86,23 @@ xfs_refcount_lookup_ge(
return xfs_btree_lookup(cur, XFS_LOOKUP_GE, stat);
}
+/*
+ * Look up the first record equal to [bno, len] in the btree
+ * given by cur.
+ */
+int
+xfs_refcount_lookup_eq(
+ struct xfs_btree_cur *cur,
+ xfs_agblock_t bno,
+ int *stat)
+{
+ trace_xfs_refcount_lookup(cur->bc_mp, cur->bc_private.a.agno, bno,
+ XFS_LOOKUP_LE);
+ cur->bc_rec.rc.rc_startblock = bno;
+ cur->bc_rec.rc.rc_blockcount = 0;
+ return xfs_btree_lookup(cur, XFS_LOOKUP_EQ, stat);
+}
+
/* Convert on-disk record to in-core format. */
void
xfs_refcount_btrec_to_irec(
@@ -147,7 +164,7 @@ xfs_refcount_update(
* by [bno, len, refcount].
* This either works (return 0) or gets an EFSCORRUPTED error.
*/
-STATIC int
+int
xfs_refcount_insert(
struct xfs_btree_cur *cur,
struct xfs_refcount_irec *irec,
diff --git a/libxfs/xfs_refcount.h b/libxfs/xfs_refcount.h
index 5973c56..cad61de 100644
--- a/libxfs/xfs_refcount.h
+++ b/libxfs/xfs_refcount.h
@@ -24,6 +24,8 @@ extern int xfs_refcount_lookup_le(struct xfs_btree_cur *cur,
xfs_agblock_t bno, int *stat);
extern int xfs_refcount_lookup_ge(struct xfs_btree_cur *cur,
xfs_agblock_t bno, int *stat);
+extern int xfs_refcount_lookup_eq(struct xfs_btree_cur *cur,
+ xfs_agblock_t bno, int *stat);
extern int xfs_refcount_get_rec(struct xfs_btree_cur *cur,
struct xfs_refcount_irec *irec, int *stat);
@@ -72,5 +74,7 @@ extern int xfs_refcount_has_record(struct xfs_btree_cur *cur,
union xfs_btree_rec;
extern void xfs_refcount_btrec_to_irec(union xfs_btree_rec *rec,
struct xfs_refcount_irec *irec);
+extern int xfs_refcount_insert(struct xfs_btree_cur *cur,
+ struct xfs_refcount_irec *irec, int *stat);
#endif /* __XFS_REFCOUNT_H__ */
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