+#define for_each_btree_key(_trans, _iter, _btree_id, \
+ _start, _flags, _k, _do) \
+ for_each_btree_key_upto(_trans, _iter, _btree_id, _start, \
+ SPOS_MAX, _flags, _k, _do)
+
+#define for_each_btree_key_reverse(_trans, _iter, _btree_id, \
+ _start, _flags, _k, _do) \
+({ \
+ struct btree_iter _iter; \
+ struct bkey_s_c _k; \
+ int _ret3 = 0; \
+ \
+ bch2_trans_iter_init((_trans), &(_iter), (_btree_id), \
+ (_start), (_flags)); \
+ \
+ do { \
+ _ret3 = lockrestart_do(_trans, ({ \
+ (_k) = bch2_btree_iter_peek_prev_type(&(_iter), \
+ (_flags)); \
+ if (!(_k).k) \
+ break; \
+ \
+ bkey_err(_k) ?: (_do); \
+ })); \
+ } while (!_ret3 && bch2_btree_iter_rewind(&(_iter))); \
+ \
+ bch2_trans_iter_exit((_trans), &(_iter)); \
+ _ret3; \
+})
+
+#define for_each_btree_key_commit(_trans, _iter, _btree_id, \
+ _start, _iter_flags, _k, \
+ _disk_res, _journal_seq, _commit_flags,\
+ _do) \
+ for_each_btree_key(_trans, _iter, _btree_id, _start, _iter_flags, _k,\
+ (_do) ?: bch2_trans_commit(_trans, (_disk_res),\
+ (_journal_seq), (_commit_flags)))
+
+#define for_each_btree_key_reverse_commit(_trans, _iter, _btree_id, \
+ _start, _iter_flags, _k, \
+ _disk_res, _journal_seq, _commit_flags,\
+ _do) \
+ for_each_btree_key_reverse(_trans, _iter, _btree_id, _start, _iter_flags, _k,\
+ (_do) ?: bch2_trans_commit(_trans, (_disk_res),\
+ (_journal_seq), (_commit_flags)))
+
+#define for_each_btree_key_upto_commit(_trans, _iter, _btree_id, \
+ _start, _end, _iter_flags, _k, \
+ _disk_res, _journal_seq, _commit_flags,\
+ _do) \
+ for_each_btree_key_upto(_trans, _iter, _btree_id, _start, _end, _iter_flags, _k,\
+ (_do) ?: bch2_trans_commit(_trans, (_disk_res),\
+ (_journal_seq), (_commit_flags)))
+
+struct bkey_s_c bch2_btree_iter_peek_and_restart_outlined(struct btree_iter *);
+
+static inline struct bkey_s_c
+__bch2_btree_iter_peek_and_restart(struct btree_trans *trans,
+ struct btree_iter *iter, unsigned flags)