From: Kent Overstreet <kent.overstreet@gmail.com>
Date: Wed, 3 Mar 2021 03:45:28 +0000 (-0500)
Subject: bcachefs: btree_iter_prev_slot()
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=18fc6ae50312a88c8a109ab0f0e68c21a2a8ab1e;p=linux.git

bcachefs: btree_iter_prev_slot()

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
---

diff --git a/fs/bcachefs/btree_iter.c b/fs/bcachefs/btree_iter.c
index 9d3333cd76f9c..c05bc8ff8b8d2 100644
--- a/fs/bcachefs/btree_iter.c
+++ b/fs/bcachefs/btree_iter.c
@@ -1904,6 +1904,14 @@ struct bkey_s_c bch2_btree_iter_next_slot(struct btree_iter *iter)
 	return bch2_btree_iter_peek_slot(iter);
 }
 
+struct bkey_s_c bch2_btree_iter_prev_slot(struct btree_iter *iter)
+{
+	if (!bch2_btree_iter_rewind_pos(iter))
+		return bkey_s_c_null;
+
+	return bch2_btree_iter_peek_slot(iter);
+}
+
 struct bkey_s_c bch2_btree_iter_peek_cached(struct btree_iter *iter)
 {
 	struct bkey_cached *ck;
diff --git a/fs/bcachefs/btree_iter.h b/fs/bcachefs/btree_iter.h
index e2469436f53b5..3ae6c29c6dad6 100644
--- a/fs/bcachefs/btree_iter.h
+++ b/fs/bcachefs/btree_iter.h
@@ -171,6 +171,7 @@ struct bkey_s_c bch2_btree_iter_prev(struct btree_iter *);
 
 struct bkey_s_c bch2_btree_iter_peek_slot(struct btree_iter *);
 struct bkey_s_c bch2_btree_iter_next_slot(struct btree_iter *);
+struct bkey_s_c bch2_btree_iter_prev_slot(struct btree_iter *);
 
 struct bkey_s_c bch2_btree_iter_peek_cached(struct btree_iter *);