bcachefs: Async object debugging

Debugging infrastructure for async objs: this lets us easily create
fast_lists for various object types so they'll be visible in debugfs.

Add new object types to the BCH_ASYNC_OBJS_TYPES() enum, and drop a
pretty-printer wrapper in async_objs.c.

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

1 files changed, 44 insertions, 0 deletions

diff --git a/fs/bcachefs/async_objs.h b/fs/bcachefs/async_objs.h
new file mode 100644
index 000000000000..cd6489b8cf76
--- /dev/null
+++ b/fs/bcachefs/async_objs.h
@@ -0,0 +1,44 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _BCACHEFS_ASYNC_OBJS_H
+#define _BCACHEFS_ASYNC_OBJS_H
+
+#ifdef CONFIG_BCACHEFS_ASYNC_OBJECT_LISTS
+static inline void __async_object_list_del(struct fast_list *head, unsigned idx)
+{
+	fast_list_remove(head, idx);
+}
+
+static inline int __async_object_list_add(struct fast_list *head, void *obj, unsigned *idx)
+{
+	int ret = fast_list_add(head, obj);
+	*idx = ret > 0 ? ret : 0;
+	return ret < 0 ? ret : 0;
+}
+
+#define async_object_list_del(_c, _list, idx)		\
+	__async_object_list_del(&(_c)->async_objs[BCH_ASYNC_OBJ_LIST_##_list].list, idx)
+
+#define async_object_list_add(_c, _list, obj, idx)		\
+	__async_object_list_add(&(_c)->async_objs[BCH_ASYNC_OBJ_LIST_##_list].list, obj, idx)
+
+void bch2_fs_async_obj_debugfs_init(struct bch_fs *);
+void bch2_fs_async_obj_exit(struct bch_fs *);
+int bch2_fs_async_obj_init(struct bch_fs *);
+
+#else /* CONFIG_BCACHEFS_ASYNC_OBJECT_LISTS */
+
+#define async_object_list_del(_c, _n, idx)		do {} while (0)
+
+static inline int __async_object_list_add(void)
+{
+	return 0;
+}
+#define async_object_list_add(_c, _n, obj, idx)		__async_object_list_add()
+
+static inline void bch2_fs_async_obj_debugfs_init(struct bch_fs *c) {}
+static inline void bch2_fs_async_obj_exit(struct bch_fs *c) {}
+static inline int bch2_fs_async_obj_init(struct bch_fs *c) { return 0; }
+
+#endif /* CONFIG_BCACHEFS_ASYNC_OBJECT_LISTS */
+
+#endif /* _BCACHEFS_ASYNC_OBJS_H */