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 | |