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authorDarrick J. Wong <darrick.wong@oracle.com>2016-08-26 08:00:10 +0200
committerDave Chinner <david@fromorbit.com>2016-08-26 08:00:10 +0200
commit5b5c2dbd3c9bcfa89fba9709c12ecc0a445c6e40 (patch)
tree25a2ac8152c5aba5ffcdeb774c7baee21c2107fd /fs
parentxfs: fix some key handling problems in _btree_simple_query_range (diff)
downloadlinux-5b5c2dbd3c9bcfa89fba9709c12ecc0a445c6e40.tar.xz
linux-5b5c2dbd3c9bcfa89fba9709c12ecc0a445c6e40.zip
xfs: simple btree query range should look right if LE lookup fails
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@oracle.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Dave Chinner <david@fromorbit.com>
Diffstat (limited to 'fs')
-rw-r--r--fs/xfs/libxfs/xfs_btree.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/fs/xfs/libxfs/xfs_btree.c b/fs/xfs/libxfs/xfs_btree.c
index b70d9f918156..08569792fe20 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);