If the initial LOOKUP_LE in the simple query range fails to find
anything, we should attempt to increment the btree cursor to see
if there actually /are/ records for what we're trying to find.
Without this patch, a bnobt range query of (0, $agsize) returns
no results because the leftmost record never has a startblock
of zero.
Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
---
fs/xfs/libxfs/xfs_btree.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/fs/xfs/libxfs/xfs_btree.c b/fs/xfs/libxfs/xfs_btree.c
index b70d9f9..0856979 100644
--- a/fs/xfs/libxfs/xfs_btree.c
+++ b/fs/xfs/libxfs/xfs_btree.c
@@ -4558,6 +4558,13 @@ xfs_btree_simple_query_range(
if (error)
goto out;
+ /* Nothing? See if there's anything to the right. */
+ if (!stat) {
+ error = xfs_btree_increment(cur, 0, &stat);
+ if (error)
+ goto out;
+ }
+
while (stat) {
/* Find the record. */
error = xfs_btree_get_rec(cur, &recp, &stat);
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