bcachefs: Kill __btree_delete_at()

With trans->updates2 gone, we can now drop this helper and use
bch2_btree_delete_at() instead.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>

fs/bcachefs/btree_update_leaf.c

@@ -771,34 +771,12 @@ bch2_trans_commit_get_rw_cold(struct btree_trans *trans)
 	return 0;
 }
 
-static int __btree_delete_at(struct btree_trans *trans, enum btree_id btree_id,
-			     struct bpos pos, unsigned trigger_flags)
-{
-	struct btree_iter *iter;
-	struct bkey_i *update;
-	int ret;
-
-	update = bch2_trans_kmalloc(trans, sizeof(struct bkey));
-	if ((ret = PTR_ERR_OR_ZERO(update)))
-		return ret;
-
-	bkey_init(&update->k);
-	update->k.p = pos;
-
-	iter = bch2_trans_get_iter(trans, btree_id, pos,
-				   BTREE_ITER_NOT_EXTENTS|
-				   BTREE_ITER_INTENT);
-	bch2_trans_update(trans, iter, update, trigger_flags);
-	bch2_trans_iter_put(trans, iter);
-	return 0;
-}
-
 static noinline int extent_front_merge(struct btree_trans *trans,
+				       struct btree_iter *iter,
 				       struct bkey_s_c k,
 				       struct btree_insert_entry *i)
 {
 	struct bch_fs *c = trans->c;
-	struct bpos l_pos = k.k->p;
 	struct bkey_i *update;
 	int ret;
 
@@ -810,8 +788,13 @@ static noinline int extent_front_merge(struct btree_trans *trans,
 	bkey_reassemble(update, k);
 
 	if (bch2_bkey_merge(c, bkey_i_to_s(update), bkey_i_to_s_c(i->k))) {
-		ret = __btree_delete_at(trans, i->btree_id, l_pos,
-					i->trigger_flags);
+		struct btree_iter *update_iter =
+			bch2_trans_copy_iter(trans, iter);
+
+		ret = bch2_btree_delete_at(trans, update_iter,
+					   i->trigger_flags);
+		bch2_trans_iter_put(trans, update_iter);
+
 		if (ret)
 			return ret;
 
@@ -841,7 +824,7 @@ static int extent_handle_overwrites(struct btree_trans *trans,
 
 	if (!bkey_cmp(k.k->p, bkey_start_pos(&i->k->k))) {
 		if (bch2_bkey_maybe_mergable(k.k, &i->k->k)) {
-			ret = extent_front_merge(trans, k, i);
+			ret = extent_front_merge(trans, iter, k, i);
 			if (ret)
 				goto out;
 		}
@@ -877,8 +860,11 @@ static int extent_handle_overwrites(struct btree_trans *trans,
 		}
 
 		if (bkey_cmp(k.k->p, i->k->k.p) <= 0) {
-			ret = __btree_delete_at(trans, i->btree_id, k.k->p,
-						i->trigger_flags);
+			update_iter = bch2_trans_copy_iter(trans, iter);
+			ret = bch2_btree_delete_at(trans, update_iter,
+						   i->trigger_flags);
+			bch2_trans_iter_put(trans, update_iter);
+
 			if (ret)
 				goto out;
 		}
@@ -891,12 +877,7 @@ static int extent_handle_overwrites(struct btree_trans *trans,
 			bkey_reassemble(update, k);
 			bch2_cut_front(i->k->k.p, update);
 
-			update_iter = bch2_trans_get_iter(trans, i->btree_id, update->k.p,
-							  BTREE_ITER_NOT_EXTENTS|
-							  BTREE_ITER_INTENT);
-			bch2_trans_update(trans, update_iter, update,
-					  i->trigger_flags);
-			bch2_trans_iter_put(trans, update_iter);
+			bch2_trans_update(trans, iter, update, i->trigger_flags);
 			goto out;
 		}
 next:
@@ -1143,16 +1124,17 @@ int bch2_btree_insert(struct bch_fs *c, enum btree_id id,
 }
 
 int bch2_btree_delete_at(struct btree_trans *trans,
-			 struct btree_iter *iter, unsigned flags)
+			 struct btree_iter *iter, unsigned trigger_flags)
 {
-	struct bkey_i k;
+	struct bkey_i *k;
 
-	bkey_init(&k.k);
-	k.k.p = iter->pos;
+	k = bch2_trans_kmalloc(trans, sizeof(*k));
+	if (IS_ERR(k))
+		return PTR_ERR(k);
 
-	return  bch2_trans_update(trans, iter, &k, 0) ?:
-		bch2_trans_commit(trans, NULL, NULL,
-				  BTREE_INSERT_NOFAIL|flags);
+	bkey_init(&k->k);
+	k->k.p = iter->pos;
+	return  bch2_trans_update(trans, iter, k, trigger_flags);
 }
 
 int bch2_btree_delete_range_trans(struct btree_trans *trans, enum btree_id id,

fs/bcachefs/fsck.c

@@ -761,7 +761,7 @@ static int check_dirents(struct bch_fs *c)
 				mode_to_type(w.inode.bi_mode),
 				(bch2_bkey_val_to_text(&PBUF(buf), c,
 						       k), buf))) {
-			ret = lockrestart_do(&trans,
+			ret = __bch2_trans_do(&trans, NULL, NULL, 0,
 					bch2_btree_delete_at(&trans, iter, 0));
 			if (ret)
 				goto err;

fs/bcachefs/tests.c

@@ -54,14 +54,16 @@ static int test_delete(struct bch_fs *c, u64 nr)
 	}
 
 	pr_info("deleting once");
-	ret = bch2_btree_delete_at(&trans, iter, 0);
+	ret = __bch2_trans_do(&trans, NULL, NULL, 0,
+			 bch2_btree_delete_at(&trans, iter, 0));
 	if (ret) {
 		bch_err(c, "delete error (first) in test_delete: %i", ret);
 		goto err;
 	}
 
 	pr_info("deleting twice");
-	ret = bch2_btree_delete_at(&trans, iter, 0);
+	ret = __bch2_trans_do(&trans, NULL, NULL, 0,
+			 bch2_btree_delete_at(&trans, iter, 0));
 	if (ret) {
 		bch_err(c, "delete error (second) in test_delete: %i", ret);
 		goto err;
@@ -101,7 +103,8 @@ static int test_delete_written(struct bch_fs *c, u64 nr)
 
 	bch2_journal_flush_all_pins(&c->journal);
 
-	ret = bch2_btree_delete_at(&trans, iter, 0);
+	ret = __bch2_trans_do(&trans, NULL, NULL, 0,
+			 bch2_btree_delete_at(&trans, iter, 0));
 	if (ret) {
 		bch_err(c, "delete error in test_delete_written: %i", ret);
 		goto err;