95 lines
3.8 KiB
Go
95 lines
3.8 KiB
Go
package features
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import (
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"errors"
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"fmt"
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"math"
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"testing"
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"github.com/cilium/ebpf"
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"github.com/cilium/ebpf/asm"
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"github.com/cilium/ebpf/internal"
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"github.com/cilium/ebpf/internal/testutils"
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"github.com/cilium/ebpf/internal/testutils/fdtrace"
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)
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func TestMain(m *testing.M) {
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fdtrace.TestMain(m)
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}
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func TestHaveProgramType(t *testing.T) {
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testutils.CheckFeatureMatrix(t, haveProgramTypeMatrix)
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}
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func TestHaveProgramTypeInvalid(t *testing.T) {
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if err := HaveProgramType(ebpf.ProgramType(math.MaxUint32)); err == nil {
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t.Fatal("Expected an error")
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} else if errors.Is(err, internal.ErrNotSupported) {
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t.Fatal("Got ErrNotSupported:", err)
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}
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}
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func TestHaveProgramHelper(t *testing.T) {
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type testCase struct {
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prog ebpf.ProgramType
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helper asm.BuiltinFunc
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expected error
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version string
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}
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// Referencing linux kernel commits to track the kernel version required to pass these test cases.
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// They cases are derived from libbpf's selftests and helper/prog combinations that are
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// probed for in cilium/cilium.
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testCases := []testCase{
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{ebpf.Kprobe, asm.FnMapLookupElem, nil, "3.19"}, // d0003ec01c66
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{ebpf.SocketFilter, asm.FnKtimeGetCoarseNs, nil, "5.11"}, // d05512618056
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{ebpf.SchedCLS, asm.FnSkbVlanPush, nil, "4.3"}, // 4e10df9a60d9
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{ebpf.Kprobe, asm.FnSkbVlanPush, ebpf.ErrNotSupported, "4.3"}, // 4e10df9a60d9
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{ebpf.Kprobe, asm.FnSysBpf, ebpf.ErrNotSupported, "5.14"}, // 79a7f8bdb159
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{ebpf.Syscall, asm.FnSysBpf, nil, "5.14"}, // 79a7f8bdb159
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{ebpf.XDP, asm.FnJiffies64, nil, "5.5"}, // 5576b991e9c1
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{ebpf.XDP, asm.FnKtimeGetBootNs, nil, "5.7"}, // 71d19214776e
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{ebpf.SchedCLS, asm.FnSkbChangeHead, nil, "5.8"}, // 6f3f65d80dac
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{ebpf.SchedCLS, asm.FnRedirectNeigh, nil, "5.10"}, // b4ab31414970
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{ebpf.SchedCLS, asm.FnSkbEcnSetCe, nil, "5.1"}, // f7c917ba11a6
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{ebpf.SchedACT, asm.FnSkAssign, nil, "5.6"}, // cf7fbe660f2d
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{ebpf.SchedACT, asm.FnFibLookup, nil, "4.18"}, // 87f5fc7e48dd
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{ebpf.Kprobe, asm.FnFibLookup, ebpf.ErrNotSupported, "4.18"}, // 87f5fc7e48dd
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{ebpf.CGroupSockAddr, asm.FnGetsockopt, nil, "5.8"}, // beecf11bc218
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{ebpf.CGroupSockAddr, asm.FnSkLookupTcp, nil, "4.20"}, // 6acc9b432e67
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{ebpf.CGroupSockAddr, asm.FnGetNetnsCookie, nil, "5.7"}, // f318903c0bf4
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{ebpf.CGroupSock, asm.FnGetNetnsCookie, nil, "5.7"}, // f318903c0bf4
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{ebpf.Kprobe, asm.FnKtimeGetCoarseNs, ebpf.ErrNotSupported, "5.16"}, // 5e0bc3082e2e
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{ebpf.CGroupSockAddr, asm.FnGetCgroupClassid, nil, "5.7"}, // 5a52ae4e32a6
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{ebpf.Kprobe, asm.FnGetBranchSnapshot, nil, "5.16"}, // 856c02dbce4f
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{ebpf.SchedCLS, asm.FnSkbSetTstamp, nil, "5.18"}, // 9bb984f28d5b
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}
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for _, tc := range testCases {
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t.Run(fmt.Sprintf("%s/%s", tc.prog.String(), tc.helper.String()), func(t *testing.T) {
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feature := fmt.Sprintf("helper %s for program type %s", tc.helper.String(), tc.prog.String())
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testutils.SkipOnOldKernel(t, tc.version, feature)
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err := HaveProgramHelper(tc.prog, tc.helper)
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if !errors.Is(err, tc.expected) {
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t.Fatalf("%s/%s: %v", tc.prog.String(), tc.helper.String(), err)
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}
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})
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}
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}
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func TestHelperProbeNotImplemented(t *testing.T) {
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// Currently we don't support probing helpers for Tracing, Extension, LSM and StructOps programs.
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// For each of those test the availability of the FnMapLookupElem helper and expect it to fail.
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for _, pt := range []ebpf.ProgramType{ebpf.Tracing, ebpf.Extension, ebpf.LSM, ebpf.StructOps} {
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t.Run(pt.String(), func(t *testing.T) {
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if err := HaveProgramHelper(pt, asm.FnMapLookupElem); err == nil {
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t.Fatal("Expected an error")
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}
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})
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}
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}
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