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package link
import (
"testing"
"github.com/cilium/ebpf"
"github.com/cilium/ebpf/internal/testutils"
)
func TestFreplace(t *testing.T) {
testutils.SkipOnOldKernel(t, "5.10", "freplace")
file := testutils.NativeFile(t, "../testdata/freplace-%s.elf")
spec, err := ebpf.LoadCollectionSpec(file)
if err != nil {
t.Fatal("Can't parse ELF:", err)
}
target, err := ebpf.NewProgram(spec.Programs["sched_process_exec"])
testutils.SkipIfNotSupported(t, err)
if err != nil {
t.Fatal("Can't create target program:", err)
}
defer target.Close()
// Test attachment specified at load time
spec.Programs["replacement"].AttachTarget = target
replacement, err := ebpf.NewProgram(spec.Programs["replacement"])
testutils.SkipIfNotSupported(t, err)
if err != nil {
t.Fatal("Can't create replacement program:", err)
}
defer replacement.Close()
freplace, err := AttachFreplace(nil, "", replacement)
testutils.SkipIfNotSupported(t, err)
if err != nil {
t.Fatal("Can't create freplace:", err)
}
testLink(t, freplace, replacement)
}
func TestFentryFexit(t *testing.T) {
testutils.SkipOnOldKernel(t, "5.5", "fentry")
spec, err := ebpf.LoadCollectionSpec(testutils.NativeFile(t, "../testdata/fentry_fexit-%s.elf"))
if err != nil {
t.Fatal("Can't parse ELF:", err)
}
target, err := ebpf.NewProgram(spec.Programs["target"])
testutils.SkipIfNotSupported(t, err)
if err != nil {
t.Fatal("Can't create target program:", err)
}
defer target.Close()
for _, name := range []string{"trace_on_entry", "trace_on_exit"} {
progSpec := spec.Programs[name]
t.Run(name, func(t *testing.T) {
progSpec.AttachTarget = target
prog, err := ebpf.NewProgram(progSpec)
if err != nil {
t.Fatal(err)
}
defer prog.Close()
t.Run("link", func(t *testing.T) {
testutils.SkipOnOldKernel(t, "5.11", "BPF_LINK_TYPE_TRACING")
tracingLink, err := AttachTracing(TracingOptions{
Program: prog,
})
if err != nil {
t.Fatal("Can't attach tracing:", err)
}
defer tracingLink.Close()
testLink(t, tracingLink, prog)
})
})
}
}
func TestTracing(t *testing.T) {
testutils.SkipOnOldKernel(t, "5.11", "BPF_LINK_TYPE_TRACING")
tests := []struct {
name string
attachTo string
programType ebpf.ProgramType
programAttachType, attachTypeOpt ebpf.AttachType
cookie uint64
}{
{
name: "AttachTraceFEntry",
attachTo: "inet_dgram_connect",
programType: ebpf.Tracing,
programAttachType: ebpf.AttachTraceFEntry,
},
{
name: "AttachTraceFEntry",
attachTo: "inet_dgram_connect",
programType: ebpf.Tracing,
programAttachType: ebpf.AttachTraceFEntry,
attachTypeOpt: ebpf.AttachTraceFEntry,
cookie: 1,
},
{
name: "AttachTraceFEntry",
attachTo: "inet_dgram_connect",
programType: ebpf.Tracing,
programAttachType: ebpf.AttachTraceFEntry,
},
{
name: "AttachTraceFExit",
attachTo: "inet_dgram_connect",
programType: ebpf.Tracing,
programAttachType: ebpf.AttachTraceFExit,
},
{
name: "AttachModifyReturn",
attachTo: "bpf_modify_return_test",
programType: ebpf.Tracing,
programAttachType: ebpf.AttachModifyReturn,
},
{
name: "AttachTraceRawTp",
attachTo: "kfree_skb",
programType: ebpf.Tracing,
programAttachType: ebpf.AttachTraceRawTp,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
prog := mustLoadProgram(t, tt.programType, tt.programAttachType, tt.attachTo)
opts := TracingOptions{Program: prog, AttachType: tt.attachTypeOpt, Cookie: tt.cookie}
link, err := AttachTracing(opts)
testutils.SkipIfNotSupported(t, err)
if err != nil {
t.Fatal(err)
}
testLink(t, link, prog)
if err = link.Close(); err != nil {
t.Fatal(err)
}
})
}
}
func TestLSM(t *testing.T) {
testutils.SkipOnOldKernel(t, "5.11", "BPF_LINK_TYPE_TRACING")
prog := mustLoadProgram(t, ebpf.LSM, ebpf.AttachLSMMac, "file_mprotect")
link, err := AttachLSM(LSMOptions{Program: prog})
testutils.SkipIfNotSupported(t, err)
if err != nil {
t.Fatal(err)
}
testLink(t, link, prog)
}
|
