1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
|
// Copyright (C) 2022 Luke Shumaker <lukeshu@lukeshu.com>
//
// SPDX-License-Identifier: GPL-2.0-or-later
package btrfsitem
import (
"git.lukeshu.com/btrfs-progs-ng/lib/binstruct"
)
// Metadata is like Extent, but doesn't have .Info.
type Metadata struct { // METADATA_ITEM=169
Head ExtentHeader
Refs []ExtentInlineRef
}
func (o *Metadata) UnmarshalBinary(dat []byte) (int, error) {
n, err := binstruct.Unmarshal(dat, &o.Head)
if err != nil {
return n, err
}
o.Refs = nil
for n < len(dat) {
var ref ExtentInlineRef
_n, err := binstruct.Unmarshal(dat[n:], &ref)
n += _n
o.Refs = append(o.Refs, ref)
if err != nil {
return n, err
}
}
return n, nil
}
func (o Metadata) MarshalBinary() ([]byte, error) {
dat, err := binstruct.Marshal(o.Head)
if err != nil {
return dat, err
}
for _, ref := range o.Refs {
bs, err := binstruct.Marshal(ref)
dat = append(dat, bs...)
if err != nil {
return dat, err
}
}
return dat, nil
}
|
