1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _BCACHEFS_SUBVOLUME_TYPES_H
3#define _BCACHEFS_SUBVOLUME_TYPES_H
4
5#include "darray.h"
6
7typedef DARRAY(u32) snapshot_id_list;
8
9#define IS_ANCESTOR_BITMAP	128
10
11struct snapshot_t {
12	u32			parent;
13	u32			skip[3];
14	u32			depth;
15	u32			children[2];
16	u32			subvol; /* Nonzero only if a subvolume points to this node: */
17	u32			tree;
18	u32			equiv;
19	unsigned long		is_ancestor[BITS_TO_LONGS(IS_ANCESTOR_BITMAP)];
20};
21
22struct snapshot_table {
23	struct rcu_head		rcu;
24	size_t			nr;
25#ifndef RUST_BINDGEN
26	DECLARE_FLEX_ARRAY(struct snapshot_t, s);
27#else
28	struct snapshot_t	s[0];
29#endif
30};
31
32typedef struct {
33	u32		subvol;
34	u64		inum;
35} subvol_inum;
36
37#endif /* _BCACHEFS_SUBVOLUME_TYPES_H */
38