bcachefs: Fix for btree_gc repairing interior btree ptrs

Using the normal transaction commit path to insert and journal updates
to interior nodes hadn't been done before this repair code was written,
not surprising that there was a bug.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

fs/bcachefs/btree_update_leaf.c

@@ -307,8 +307,7 @@ btree_key_can_insert_cached(struct btree_trans *trans,
 }
 
 static inline void do_btree_insert_one(struct btree_trans *trans,
-				       struct btree_iter *iter,
-				       struct bkey_i *insert)
+				       struct btree_insert_entry *i)
 {
 	struct bch_fs *c = trans->c;
 	struct journal *j = &c->journal;
@@ -317,20 +316,22 @@ static inline void do_btree_insert_one(struct btree_trans *trans,
 	EBUG_ON(trans->journal_res.ref !=
 		!(trans->flags & BTREE_INSERT_JOURNAL_REPLAY));
 
-	insert->k.needs_whiteout = false;
+	i->k->k.needs_whiteout = false;
 
-	did_work = (btree_iter_type(iter) != BTREE_ITER_CACHED)
-		? btree_insert_key_leaf(trans, iter, insert)
-		: bch2_btree_insert_key_cached(trans, iter, insert);
+	did_work = (btree_iter_type(i->iter) != BTREE_ITER_CACHED)
+		? btree_insert_key_leaf(trans, i->iter, i->k)
+		: bch2_btree_insert_key_cached(trans, i->iter, i->k);
 	if (!did_work)
 		return;
 
 	if (likely(!(trans->flags & BTREE_INSERT_JOURNAL_REPLAY))) {
 		bch2_journal_add_keys(j, &trans->journal_res,
-				      iter->btree_id, insert);
+				      i->btree_id,
+				      i->level,
+				      i->k);
 
 		bch2_journal_set_has_inode(j, &trans->journal_res,
-					   insert->k.p.inode);
+					   i->k->k.p.inode);
 
 		if (trans->journal_seq)
 			*trans->journal_seq = trans->journal_res.seq;
@@ -468,7 +469,7 @@ bch2_trans_commit_write_locked(struct btree_trans *trans,
 		bch2_trans_mark_gc(trans);
 
 	trans_for_each_update2(trans, i)
-		do_btree_insert_one(trans, i->iter, i->k);
+		do_btree_insert_one(trans, i);
 err:
 	if (marking) {
 		percpu_up_read(&c->mark_lock);

fs/bcachefs/journal.h

@@ -241,10 +241,11 @@ static inline void bch2_journal_add_entry(struct journal *j, struct journal_res
 }
 
 static inline void bch2_journal_add_keys(struct journal *j, struct journal_res *res,
-					enum btree_id id, const struct bkey_i *k)
+					enum btree_id id, unsigned level,
+					const struct bkey_i *k)
 {
 	bch2_journal_add_entry(j, res, BCH_JSET_ENTRY_btree_keys,
-			       id, 0, k, k->k.u64s);
+			       id, level, k, k->k.u64s);
 }
 
 static inline bool journal_entry_empty(struct jset *j)