1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _BCACHEFS_REFLINK_FORMAT_H
3 #define _BCACHEFS_REFLINK_FORMAT_H
4
5 struct bch_reflink_p {
6 struct bch_val v;
7 __le64 idx;
8 /*
9 * A reflink pointer might point to an indirect extent which is then
10 * later split (by copygc or rebalance). If we only pointed to part of
11 * the original indirect extent, and then one of the fragments is
12 * outside the range we point to, we'd leak a refcount: so when creating
13 * reflink pointers, we need to store pad values to remember the full
14 * range we were taking a reference on.
15 */
16 __le32 front_pad;
17 __le32 back_pad;
18 } __packed __aligned(8);
19
20 struct bch_reflink_v {
21 struct bch_val v;
22 __le64 refcount;
23 union bch_extent_entry start[0];
24 __u64 _data[];
25 } __packed __aligned(8);
26
27 struct bch_indirect_inline_data {
28 struct bch_val v;
29 __le64 refcount;
30 u8 data[];
31 };
32
33 #endif /* _BCACHEFS_REFLINK_FORMAT_H */
34
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