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
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
|
package link
import (
"fmt"
"net"
"testing"
"github.com/cilium/ebpf"
"github.com/cilium/ebpf/internal/testutils"
"github.com/go-quicktest/qt"
)
func TestProgramAlter(t *testing.T) {
testutils.SkipOnOldKernel(t, "4.13", "SkSKB type")
prog := mustLoadProgram(t, ebpf.SkSKB, 0, "")
var sockMap *ebpf.Map
sockMap, err := ebpf.NewMap(&ebpf.MapSpec{
Type: ebpf.MapType(15), // BPF_MAP_TYPE_SOCKMAP
KeySize: 4,
ValueSize: 4,
MaxEntries: 2,
})
if err != nil {
t.Fatal(err)
}
defer sockMap.Close()
err = RawAttachProgram(RawAttachProgramOptions{
Target: sockMap.FD(),
Program: prog,
Attach: ebpf.AttachSkSKBStreamParser,
})
if err != nil {
t.Fatal(err)
}
err = RawDetachProgram(RawDetachProgramOptions{
Target: sockMap.FD(),
Program: prog,
Attach: ebpf.AttachSkSKBStreamParser,
})
if err != nil {
t.Fatal(err)
}
}
func TestRawAttachProgramAnchor(t *testing.T) {
testutils.SkipOnOldKernel(t, "6.6", "attach anchor")
iface, err := net.InterfaceByName("lo")
qt.Assert(t, qt.IsNil(err))
a := mustLoadProgram(t, ebpf.SchedCLS, 0, "")
info, err := a.Info()
qt.Assert(t, qt.IsNil(err))
aID, _ := info.ID()
err = RawAttachProgram(RawAttachProgramOptions{
Target: iface.Index,
Program: a,
Attach: ebpf.AttachTCXIngress,
})
qt.Assert(t, qt.IsNil(err))
defer RawDetachProgram(RawDetachProgramOptions{
Target: iface.Index,
Program: a,
Attach: ebpf.AttachTCXIngress,
})
link, err := AttachTCX(TCXOptions{
Interface: iface.Index,
Program: mustLoadProgram(t, ebpf.SchedCLS, 0, ""),
Attach: ebpf.AttachTCXIngress,
})
qt.Assert(t, qt.IsNil(err))
defer link.Close()
linkInfo, err := link.Info()
qt.Assert(t, qt.IsNil(err))
b := mustLoadProgram(t, ebpf.SchedCLS, 0, "")
for _, anchor := range []Anchor{
Head(),
Tail(),
AfterProgram(a),
AfterProgramByID(aID),
AfterLink(link),
AfterLinkByID(linkInfo.ID),
} {
t.Run(fmt.Sprintf("%T", anchor), func(t *testing.T) {
err := RawAttachProgram(RawAttachProgramOptions{
Target: iface.Index,
Program: b,
Attach: ebpf.AttachTCXIngress,
Anchor: anchor,
})
qt.Assert(t, qt.IsNil(err))
// Detach doesn't allow first or last anchor.
if _, ok := anchor.(firstAnchor); ok {
anchor = nil
} else if _, ok := anchor.(lastAnchor); ok {
anchor = nil
}
err = RawDetachProgram(RawDetachProgramOptions{
Target: iface.Index,
Program: b,
Attach: ebpf.AttachTCXIngress,
Anchor: anchor,
})
qt.Assert(t, qt.IsNil(err))
})
}
// Check that legacy replacement with a program works.
err = RawAttachProgram(RawAttachProgramOptions{
Target: iface.Index,
Program: b,
Attach: ebpf.AttachTCXIngress,
Anchor: ReplaceProgram(a),
})
qt.Assert(t, qt.IsNil(err))
err = RawDetachProgram(RawDetachProgramOptions{
Target: iface.Index,
Program: b,
Attach: ebpf.AttachTCXIngress,
})
qt.Assert(t, qt.IsNil(err))
}
|
