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map_test.go
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map_test.go
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package ebpf
import (
"bytes"
"errors"
"fmt"
"math"
"os"
"path/filepath"
"sort"
"testing"
"unsafe"
"github.com/cilium/ebpf/asm"
"github.com/cilium/ebpf/btf"
"github.com/cilium/ebpf/internal"
"github.com/cilium/ebpf/internal/sys"
"github.com/cilium/ebpf/internal/testutils"
"github.com/cilium/ebpf/internal/unix"
"github.com/go-quicktest/qt"
)
var (
spec1 = &MapSpec{
Name: "foo",
Type: Hash,
KeySize: 4,
ValueSize: 4,
MaxEntries: 1,
Pinning: PinByName,
}
)
// newHash returns a new Map of type Hash. Cleanup is handled automatically.
func newHash(t *testing.T) *Map {
hash, err := NewMap(&MapSpec{
Type: Hash,
KeySize: 5,
ValueSize: 4,
MaxEntries: 10,
})
if err != nil {
t.Fatal(err)
}
t.Cleanup(func() { hash.Close() })
return hash
}
func TestMap(t *testing.T) {
m := createArray(t)
t.Log(m)
if err := m.Put(uint32(0), uint32(42)); err != nil {
t.Fatal("Can't put:", err)
}
if err := m.Put(uint32(1), uint32(4242)); err != nil {
t.Fatal("Can't put:", err)
}
m2, err := m.Clone()
if err != nil {
t.Fatal("Can't clone map:", err)
}
defer m2.Close()
m.Close()
m = m2
var v uint32
if err := m.Lookup(uint32(0), &v); err != nil {
t.Fatal("Can't lookup 0:", err)
}
if v != 42 {
t.Error("Want value 42, got", v)
}
sliceVal := make([]uint32, 1)
qt.Assert(t, qt.IsNil(m.Lookup(uint32(0), sliceVal)))
qt.Assert(t, qt.DeepEquals(sliceVal, []uint32{42}))
var slice []byte
qt.Assert(t, qt.IsNil(m.Lookup(uint32(0), &slice)))
qt.Assert(t, qt.DeepEquals(slice, internal.NativeEndian.AppendUint32(nil, 42)))
var k uint32
if err := m.NextKey(uint32(0), &k); err != nil {
t.Fatal("Can't get:", err)
}
if k != 1 {
t.Error("Want key 1, got", k)
}
}
func TestMapSpecCopy(t *testing.T) {
a := &MapSpec{
"foo",
Hash,
4,
4,
1,
1,
PinByName,
1,
[]MapKV{{1, 2}}, // Can't copy Contents, use value types
nil, // InnerMap
bytes.NewReader(nil),
&btf.Int{},
&btf.Int{},
}
a.InnerMap = a
qt.Check(t, qt.IsNil((*MapSpec)(nil).Copy()))
qt.Assert(t, testutils.IsDeepCopy(a.Copy(), a))
}
func TestMapBatch(t *testing.T) {
if err := haveBatchAPI(); err != nil {
t.Skipf("batch api not available: %v", err)
}
contents := []uint32{
42, 4242, 23, 2323,
}
mustNewMap := func(t *testing.T, mapType MapType, max uint32) *Map {
m, err := NewMap(&MapSpec{
Type: mapType,
KeySize: 4,
ValueSize: 4,
MaxEntries: max,
})
if err != nil {
t.Fatal(err)
}
t.Cleanup(func() { m.Close() })
return m
}
keysAndValuesForMap := func(m *Map, contents []uint32) (keys, values []uint32, stride int) {
possibleCPU := 1
if m.Type().hasPerCPUValue() {
possibleCPU = MustPossibleCPU()
}
keys = make([]uint32, 0, len(contents))
values = make([]uint32, 0, len(contents)*possibleCPU)
for key, value := range contents {
keys = append(keys, uint32(key))
for i := 0; i < possibleCPU; i++ {
values = append(values, value*uint32((i+1)))
}
}
return keys, values, possibleCPU
}
for _, typ := range []MapType{Array, PerCPUArray} {
t.Run(typ.String(), func(t *testing.T) {
if typ == PerCPUArray {
// https://lore.kernel.org/bpf/20210424214510.806627-2-pctammela@mojatatu.com/
testutils.SkipOnOldKernel(t, "5.13", "batched ops support for percpu array")
}
m := mustNewMap(t, typ, uint32(len(contents)))
keys, values, _ := keysAndValuesForMap(m, contents)
count, err := m.BatchUpdate(keys, values, nil)
qt.Assert(t, qt.IsNil(err))
qt.Assert(t, qt.Equals(count, len(contents)))
lookupKeys := make([]uint32, len(keys))
lookupValues := make([]uint32, len(values))
var cursor MapBatchCursor
count, err = m.BatchLookup(&cursor, lookupKeys, lookupValues, nil)
qt.Assert(t, qt.IsNil(err))
qt.Assert(t, qt.Equals(count, len(contents)))
qt.Assert(t, qt.ContentEquals(lookupKeys, keys))
qt.Assert(t, qt.ContentEquals(lookupValues, values))
count, err = m.BatchLookup(&cursor, lookupKeys, lookupValues, nil)
qt.Assert(t, qt.ErrorIs(err, ErrKeyNotExist))
qt.Assert(t, qt.Equals(count, 0))
})
}
for _, typ := range []MapType{Hash, PerCPUHash} {
t.Run(typ.String(), func(t *testing.T) {
m := mustNewMap(t, typ, uint32(len(contents)))
keys, values, stride := keysAndValuesForMap(m, contents)
count, err := m.BatchUpdate(keys, values, nil)
qt.Assert(t, qt.IsNil(err))
qt.Assert(t, qt.Equals(count, len(contents)))
// BPF hash tables seem to have lots of collisions when keys
// are following a sequence.
// This causes ENOSPC since a single large bucket may be larger
// than the batch size. We work around this by making the batch size
// equal to the map size.
lookupKeys := make([]uint32, len(keys))
lookupValues := make([]uint32, len(values))
var cursor MapBatchCursor
count, err = m.BatchLookup(&cursor, lookupKeys, lookupValues, nil)
qt.Assert(t, qt.ErrorIs(err, ErrKeyNotExist))
qt.Assert(t, qt.Equals(count, len(contents)))
qt.Assert(t, qt.ContentEquals(lookupKeys, keys))
qt.Assert(t, qt.ContentEquals(lookupValues, values))
cursor = MapBatchCursor{}
count, err = m.BatchLookupAndDelete(&cursor, lookupKeys, lookupValues, nil)
qt.Assert(t, qt.ErrorIs(err, ErrKeyNotExist))
qt.Assert(t, qt.Equals(count, len(contents)))
qt.Assert(t, qt.ContentEquals(lookupKeys, keys))
qt.Assert(t, qt.ContentEquals(lookupValues, values))
if stride > 1 {
values := make([]uint32, stride)
qt.Assert(t, qt.ErrorIs(m.Lookup(uint32(0), values), ErrKeyNotExist))
} else {
var v uint32
qt.Assert(t, qt.ErrorIs(m.Lookup(uint32(0), &v), ErrKeyNotExist))
}
})
}
}
func TestMapBatchCursorReuse(t *testing.T) {
spec := &MapSpec{
Type: Array,
KeySize: 4,
ValueSize: 4,
MaxEntries: 4,
}
arr1, err := NewMap(spec)
if err != nil {
t.Fatal(err)
}
defer arr1.Close()
arr2, err := NewMap(spec)
if err != nil {
t.Fatal(err)
}
defer arr2.Close()
tmp := make([]uint32, 2)
var cursor MapBatchCursor
_, err = arr1.BatchLookup(&cursor, tmp, tmp, nil)
testutils.SkipIfNotSupported(t, err)
qt.Assert(t, qt.IsNil(err))
_, err = arr2.BatchLookup(&cursor, tmp, tmp, nil)
qt.Assert(t, qt.IsNotNil(err))
}
func TestMapLookupKeyTooSmall(t *testing.T) {
m := createArray(t)
defer m.Close()
var small uint16
qt.Assert(t, qt.IsNil(m.Put(uint32(0), uint32(1234))))
qt.Assert(t, qt.IsNotNil(m.Lookup(uint32(0), &small)))
}
func TestMapLookupKeyNotFoundAllocations(t *testing.T) {
m := createArray(t)
defer m.Close()
var key, out uint32 = 3, 0
allocs := testing.AllocsPerRun(5, func() {
_ = m.Lookup(&key, &out)
})
qt.Assert(t, qt.Equals(allocs, float64(0)))
}
func TestBatchAPIMapDelete(t *testing.T) {
if err := haveBatchAPI(); err != nil {
t.Skipf("batch api not available: %v", err)
}
m, err := NewMap(&MapSpec{
Type: Hash,
KeySize: 4,
ValueSize: 4,
MaxEntries: 10,
})
if err != nil {
t.Fatal(err)
}
defer m.Close()
var (
keys = []uint32{0, 1}
values = []uint32{42, 4242}
)
count, err := m.BatchUpdate(keys, values, nil)
if err != nil {
t.Fatalf("BatchUpdate: %v", err)
}
if count != len(keys) {
t.Fatalf("BatchUpdate: expected count, %d, to be %d", count, len(keys))
}
var v uint32
if err := m.Lookup(uint32(0), &v); err != nil {
t.Fatal("Can't lookup 0:", err)
}
if v != 42 {
t.Error("Want value 42, got", v)
}
count, err = m.BatchDelete(keys, nil)
if err != nil {
t.Fatalf("BatchDelete: %v", err)
}
if count != len(keys) {
t.Fatalf("BatchDelete: expected %d deletions got %d", len(keys), count)
}
if err := m.Lookup(uint32(0), &v); !errors.Is(err, ErrKeyNotExist) {
t.Fatalf("Lookup should have failed with error, %v, instead error is %v", ErrKeyNotExist, err)
}
}
func TestMapClose(t *testing.T) {
m := createArray(t)
if err := m.Close(); err != nil {
t.Fatal("Can't close map:", err)
}
if err := m.Put(uint32(0), uint32(42)); !errors.Is(err, sys.ErrClosedFd) {
t.Fatal("Put doesn't check for closed fd", err)
}
if _, err := m.LookupBytes(uint32(0)); !errors.Is(err, sys.ErrClosedFd) {
t.Fatal("Get doesn't check for closed fd", err)
}
}
func TestBatchMapWithLock(t *testing.T) {
testutils.SkipOnOldKernel(t, "5.13", "MAP BATCH BPF_F_LOCK")
file := testutils.NativeFile(t, "testdata/map_spin_lock-%s.elf")
spec, err := LoadCollectionSpec(file)
if err != nil {
t.Fatal("Can't parse ELF:", err)
}
coll, err := NewCollection(spec)
if err != nil {
t.Fatal("Can't parse ELF:", err)
}
defer coll.Close()
type spinLockValue struct {
Cnt uint32
Padding uint32
}
m, ok := coll.Maps["spin_lock_map"]
if !ok {
t.Fatal(err)
}
keys := []uint32{0, 1}
values := []spinLockValue{{Cnt: 42}, {Cnt: 4242}}
count, err := m.BatchUpdate(keys, values, &BatchOptions{ElemFlags: uint64(UpdateLock)})
if err != nil {
t.Fatalf("BatchUpdate: %v", err)
}
if count != len(keys) {
t.Fatalf("BatchUpdate: expected count, %d, to be %d", count, len(keys))
}
var cursor MapBatchCursor
lookupKeys := make([]uint32, 2)
lookupValues := make([]spinLockValue, 2)
count, err = m.BatchLookup(&cursor, lookupKeys, lookupValues, &BatchOptions{ElemFlags: uint64(LookupLock)})
if !errors.Is(err, ErrKeyNotExist) {
t.Fatalf("BatchLookup: %v", err)
}
if count != 2 {
t.Fatalf("BatchLookup: expected two keys, got %d", count)
}
cursor = MapBatchCursor{}
deleteKeys := []uint32{0, 1}
deleteValues := make([]spinLockValue, 2)
count, err = m.BatchLookupAndDelete(&cursor, deleteKeys, deleteValues, nil)
if !errors.Is(err, ErrKeyNotExist) {
t.Fatalf("BatchLookupAndDelete: %v", err)
}
if count != 2 {
t.Fatalf("BatchLookupAndDelete: expected two keys, got %d", count)
}
}
func TestMapWithLock(t *testing.T) {
testutils.SkipOnOldKernel(t, "5.13", "MAP BPF_F_LOCK")
file := testutils.NativeFile(t, "testdata/map_spin_lock-%s.elf")
spec, err := LoadCollectionSpec(file)
if err != nil {
t.Fatal("Can't parse ELF:", err)
}
coll, err := NewCollection(spec)
if err != nil {
t.Fatal("Can't parse ELF:", err)
}
defer coll.Close()
type spinLockValue struct {
Cnt uint32
Padding uint32
}
m, ok := coll.Maps["spin_lock_map"]
if !ok {
t.Fatal(err)
}
key := uint32(1)
value := spinLockValue{Cnt: 5}
err = m.Update(key, value, UpdateLock)
if err != nil {
t.Fatal(err)
}
value.Cnt = 0
err = m.LookupWithFlags(&key, &value, LookupLock)
if err != nil {
t.Fatal(err)
}
if value.Cnt != 5 {
t.Fatalf("Want value 5, got %d", value.Cnt)
}
t.Run("LookupAndDelete", func(t *testing.T) {
testutils.SkipOnOldKernel(t, "5.14", "LOOKUP_AND_DELETE flags")
value.Cnt = 0
err = m.LookupAndDeleteWithFlags(&key, &value, LookupLock)
if err != nil {
t.Fatal(err)
}
if value.Cnt != 5 {
t.Fatalf("Want value 5, got %d", value.Cnt)
}
err = m.LookupWithFlags(&key, &value, LookupLock)
if err != nil && !errors.Is(err, ErrKeyNotExist) {
t.Fatal(err)
}
})
}
func TestMapCloneNil(t *testing.T) {
m, err := (*Map)(nil).Clone()
if err != nil {
t.Fatal(err)
}
if m != nil {
t.Fatal("Cloning a nil map doesn't return nil")
}
}
func TestMapPin(t *testing.T) {
m := createArray(t)
if err := m.Put(uint32(0), uint32(42)); err != nil {
t.Fatal("Can't put:", err)
}
tmp := testutils.TempBPFFS(t)
path := filepath.Join(tmp, "map")
if err := m.Pin(path); err != nil {
testutils.SkipIfNotSupported(t, err)
t.Fatal(err)
}
pinned := m.IsPinned()
qt.Assert(t, qt.IsTrue(pinned))
m.Close()
m, err := LoadPinnedMap(path, nil)
testutils.SkipIfNotSupported(t, err)
if err != nil {
t.Fatal(err)
}
defer m.Close()
var v uint32
if err := m.Lookup(uint32(0), &v); err != nil {
t.Fatal("Can't lookup 0:", err)
}
if v != 42 {
t.Error("Want value 42, got", v)
}
}
func TestNestedMapPin(t *testing.T) {
m, err := NewMap(&MapSpec{
Type: ArrayOfMaps,
KeySize: 4,
ValueSize: 4,
MaxEntries: 2,
InnerMap: &MapSpec{
Type: Array,
KeySize: 4,
ValueSize: 4,
MaxEntries: 1,
},
})
testutils.SkipIfNotSupported(t, err)
if err != nil {
t.Fatal(err)
}
defer m.Close()
tmp, err := os.MkdirTemp("/sys/fs/bpf", "ebpf-test")
if err != nil {
t.Fatal(err)
}
defer os.RemoveAll(tmp)
path := filepath.Join(tmp, "nested")
if err := m.Pin(path); err != nil {
t.Fatal(err)
}
m.Close()
m, err = LoadPinnedMap(path, nil)
testutils.SkipIfNotSupported(t, err)
if err != nil {
t.Fatal(err)
}
defer m.Close()
}
func TestNestedMapPinNested(t *testing.T) {
if _, err := NewMap(&MapSpec{
Type: ArrayOfMaps,
KeySize: 4,
ValueSize: 4,
MaxEntries: 2,
InnerMap: &MapSpec{
Name: "inner",
Type: Array,
KeySize: 4,
ValueSize: 4,
MaxEntries: 1,
Pinning: PinByName,
},
}); err == nil {
t.Error("Inner maps should not be pinnable")
}
}
func TestMapPinMultiple(t *testing.T) {
testutils.SkipOnOldKernel(t, "4.9", "atomic re-pinning was introduced in 4.9 series")
tmp := testutils.TempBPFFS(t)
spec := spec1.Copy()
m1, err := NewMapWithOptions(spec, MapOptions{PinPath: tmp})
if err != nil {
t.Fatal("Can't create map:", err)
}
defer m1.Close()
pinned := m1.IsPinned()
qt.Assert(t, qt.IsTrue(pinned))
newPath := filepath.Join(tmp, "bar")
err = m1.Pin(newPath)
testutils.SkipIfNotSupported(t, err)
qt.Assert(t, qt.IsNil(err))
oldPath := filepath.Join(tmp, spec.Name)
if _, err := os.Stat(oldPath); err == nil {
t.Fatal("Previous pinned map path still exists:", err)
}
m2, err := LoadPinnedMap(newPath, nil)
qt.Assert(t, qt.IsNil(err))
pinned = m2.IsPinned()
qt.Assert(t, qt.IsTrue(pinned))
defer m2.Close()
}
func TestMapPinWithEmptyPath(t *testing.T) {
m := createArray(t)
err := m.Pin("")
qt.Assert(t, qt.Not(qt.IsNil(err)))
}
func TestMapPinFailReplace(t *testing.T) {
tmp := testutils.TempBPFFS(t)
spec := spec1.Copy()
spec2 := spec1.Copy()
spec2.Name = spec1.Name + "bar"
m, err := NewMapWithOptions(spec, MapOptions{PinPath: tmp})
if err != nil {
t.Fatal("Failed to create map:", err)
}
defer m.Close()
m2, err := NewMapWithOptions(spec2, MapOptions{PinPath: tmp})
if err != nil {
t.Fatal("Failed to create map2:", err)
}
defer m2.Close()
qt.Assert(t, qt.IsTrue(m.IsPinned()))
newPath := filepath.Join(tmp, spec2.Name)
qt.Assert(t, qt.Not(qt.IsNil(m.Pin(newPath))), qt.Commentf("Pin didn't"+
" fail new path from replacing an existing path"))
}
func TestMapUnpin(t *testing.T) {
tmp := testutils.TempBPFFS(t)
spec := spec1.Copy()
m, err := NewMapWithOptions(spec, MapOptions{PinPath: tmp})
if err != nil {
t.Fatal("Failed to create map:", err)
}
defer m.Close()
pinned := m.IsPinned()
qt.Assert(t, qt.IsTrue(pinned))
path := filepath.Join(tmp, spec.Name)
m2, err := LoadPinnedMap(path, nil)
testutils.SkipIfNotSupported(t, err)
qt.Assert(t, qt.IsNil(err))
defer m2.Close()
if err = m.Unpin(); err != nil {
t.Fatal("Failed to unpin map:", err)
}
if _, err := os.Stat(path); err == nil {
t.Fatal("Pinned map path still exists after unpinning:", err)
}
}
func TestMapLoadPinned(t *testing.T) {
tmp := testutils.TempBPFFS(t)
spec := spec1.Copy()
m1, err := NewMapWithOptions(spec, MapOptions{PinPath: tmp})
qt.Assert(t, qt.IsNil(err))
defer m1.Close()
pinned := m1.IsPinned()
qt.Assert(t, qt.IsTrue(pinned))
path := filepath.Join(tmp, spec.Name)
m2, err := LoadPinnedMap(path, nil)
testutils.SkipIfNotSupported(t, err)
qt.Assert(t, qt.IsNil(err))
defer m2.Close()
pinned = m2.IsPinned()
qt.Assert(t, qt.IsTrue(pinned))
}
func TestMapLoadReusePinned(t *testing.T) {
for _, typ := range []MapType{Array, Hash, DevMap, DevMapHash} {
t.Run(typ.String(), func(t *testing.T) {
if typ == DevMap {
testutils.SkipOnOldKernel(t, "4.14", "devmap")
}
if typ == DevMapHash {
testutils.SkipOnOldKernel(t, "5.4", "devmap_hash")
}
tmp := testutils.TempBPFFS(t)
spec := &MapSpec{
Name: "pinmap",
Type: typ,
KeySize: 4,
ValueSize: 4,
MaxEntries: 1,
Pinning: PinByName,
}
m1, err := NewMapWithOptions(spec, MapOptions{PinPath: tmp})
qt.Assert(t, qt.IsNil(err))
defer m1.Close()
m2, err := NewMapWithOptions(spec, MapOptions{PinPath: tmp})
qt.Assert(t, qt.IsNil(err))
defer m2.Close()
})
}
}
func TestMapLoadPinnedUnpin(t *testing.T) {
tmp := testutils.TempBPFFS(t)
spec := spec1.Copy()
m1, err := NewMapWithOptions(spec, MapOptions{PinPath: tmp})
qt.Assert(t, qt.IsNil(err))
defer m1.Close()
pinned := m1.IsPinned()
qt.Assert(t, qt.IsTrue(pinned))
path := filepath.Join(tmp, spec.Name)
m2, err := LoadPinnedMap(path, nil)
testutils.SkipIfNotSupported(t, err)
qt.Assert(t, qt.IsNil(err))
defer m2.Close()
err = m1.Unpin()
qt.Assert(t, qt.IsNil(err))
err = m2.Unpin()
qt.Assert(t, qt.IsNil(err))
}
func TestMapLoadPinnedWithOptions(t *testing.T) {
// Introduced in commit 6e71b04a8224.
testutils.SkipOnOldKernel(t, "4.15", "file_flags in BPF_OBJ_GET")
array := createArray(t)
tmp := testutils.TempBPFFS(t)
path := filepath.Join(tmp, "map")
if err := array.Pin(path); err != nil {
t.Fatal(err)
}
if err := array.Put(uint32(0), uint32(123)); err != nil {
t.Fatal(err)
}
array.Close()
t.Run("read-only", func(t *testing.T) {
array, err := LoadPinnedMap(path, &LoadPinOptions{
ReadOnly: true,
})
testutils.SkipIfNotSupported(t, err)
if err != nil {
t.Fatal("Can't load map:", err)
}
defer array.Close()
if err := array.Put(uint32(0), uint32(1)); !errors.Is(err, unix.EPERM) {
t.Fatal("Expected EPERM from Put, got", err)
}
})
t.Run("write-only", func(t *testing.T) {
array, err := LoadPinnedMap(path, &LoadPinOptions{
WriteOnly: true,
})
testutils.SkipIfNotSupported(t, err)
if err != nil {
t.Fatal("Can't load map:", err)
}
defer array.Close()
var value uint32
if err := array.Lookup(uint32(0), &value); !errors.Is(err, unix.EPERM) {
t.Fatal("Expected EPERM from Lookup, got", err)
}
})
}
func TestMapPinFlags(t *testing.T) {
tmp := testutils.TempBPFFS(t)
spec := &MapSpec{
Name: "map",
Type: Array,
KeySize: 4,
ValueSize: 4,
MaxEntries: 1,
Pinning: PinByName,
}
m, err := NewMapWithOptions(spec, MapOptions{
PinPath: tmp,
})
qt.Assert(t, qt.IsNil(err))
m.Close()
_, err = NewMapWithOptions(spec, MapOptions{
PinPath: tmp,
LoadPinOptions: LoadPinOptions{
Flags: math.MaxUint32,
},
})
if !errors.Is(err, unix.EINVAL) {
t.Fatal("Invalid flags should trigger EINVAL:", err)
}
}
func createArray(t *testing.T) *Map {
t.Helper()
m, err := NewMap(&MapSpec{
Type: Array,
KeySize: 4,
ValueSize: 4,
MaxEntries: 2,
})
if err != nil {
t.Fatal(err)
}
t.Cleanup(func() { m.Close() })
return m
}
func TestMapQueue(t *testing.T) {
testutils.SkipOnOldKernel(t, "4.20", "map type queue")
m, err := NewMap(&MapSpec{
Type: Queue,
ValueSize: 4,
MaxEntries: 2,
})
if err != nil {
t.Fatal(err)
}
defer m.Close()
for _, v := range []uint32{42, 4242} {
if err := m.Put(nil, v); err != nil {
t.Fatalf("Can't put %d: %s", v, err)
}
}
var v uint32
if err := m.Lookup(nil, &v); err != nil {
t.Fatal("Lookup (Peek) on Queue:", err)
}
if v != 42 {
t.Error("Want value 42, got", v)
}
v = 0
if err := m.LookupAndDelete(nil, &v); err != nil {
t.Fatal("Can't lookup and delete element:", err)
}
if v != 42 {
t.Error("Want value 42, got", v)
}
v = 0
if err := m.LookupAndDelete(nil, unsafe.Pointer(&v)); err != nil {
t.Fatal("Can't lookup and delete element using unsafe.Pointer:", err)
}
if v != 4242 {
t.Error("Want value 4242, got", v)
}
if err := m.LookupAndDelete(nil, &v); !errors.Is(err, ErrKeyNotExist) {
t.Fatal("Lookup and delete on empty Queue:", err)
}
if err := m.Lookup(nil, &v); !errors.Is(err, ErrKeyNotExist) {
t.Fatal("Lookup (Peek) on empty Queue:", err)
}
}
func TestMapInMap(t *testing.T) {
for _, typ := range []MapType{ArrayOfMaps, HashOfMaps} {
t.Run(typ.String(), func(t *testing.T) {
spec := &MapSpec{
Type: typ,
KeySize: 4,
MaxEntries: 2,
InnerMap: &MapSpec{
Type: Array,
KeySize: 4,
ValueSize: 4,
MaxEntries: 2,
},
}
inner, err := NewMap(spec.InnerMap)
if err != nil {
t.Fatal(err)
}
if err := inner.Put(uint32(1), uint32(4242)); err != nil {
t.Fatal(err)
}
defer inner.Close()
outer, err := NewMap(spec)
testutils.SkipIfNotSupported(t, err)
if err != nil {
t.Fatal(err)
}
defer outer.Close()
if err := outer.Put(uint32(0), inner); err != nil {
t.Fatal("Can't put inner map:", err)
}
if err := outer.Put(uint32(0), (*Map)(nil)); err == nil {
t.Fatal("Put accepted a nil Map")
}
var inner2 *Map
if err := outer.Lookup(uint32(0), &inner2); err != nil {
t.Fatal("Can't lookup 0:", err)
}
defer inner2.Close()
var v uint32
if err := inner2.Lookup(uint32(1), &v); err != nil {
t.Fatal("Can't lookup 1 in inner2:", err)
}
if v != 4242 {
t.Error("Expected value 4242, got", v)
}
inner2.Close()
// Make sure we can still access the original map
if err := inner.Lookup(uint32(1), &v); err != nil {
t.Fatal("Can't lookup 1 in inner:", err)
}
if v != 4242 {
t.Error("Expected value 4242, got", v)
}
})
}
}
func TestNewMapInMapFromFD(t *testing.T) {
nested, err := NewMap(&MapSpec{
Type: ArrayOfMaps,
KeySize: 4,
MaxEntries: 2,
InnerMap: &MapSpec{
Type: Array,
KeySize: 4,
ValueSize: 4,
MaxEntries: 2,
},
})
testutils.SkipIfNotSupported(t, err)
if err != nil {
t.Fatal(err)
}
defer nested.Close()
// Do not copy this, use Clone instead.
another, err := NewMapFromFD(dupFD(t, nested.FD()))
if err != nil {
t.Fatal("Can't create a new nested map from an FD")
}
another.Close()
}
func TestPerfEventArray(t *testing.T) {
specs := []*MapSpec{
{Type: PerfEventArray},
{Type: PerfEventArray, KeySize: 4},
{Type: PerfEventArray, ValueSize: 4},
}
for _, spec := range specs {
m, err := NewMap(spec)
if err != nil {
t.Errorf("Can't create perf event array from %v: %s", spec, err)
} else {
m.Close()
}
}
}
func TestCPUMap(t *testing.T) {
testutils.SkipOnOldKernel(t, "4.15", "cpu map")
m, err := NewMap(&MapSpec{Type: CPUMap, KeySize: 4, ValueSize: 4})
qt.Assert(t, qt.IsNil(err))
qt.Assert(t, qt.Equals(m.MaxEntries(), uint32(MustPossibleCPU())))
m.Close()
}
func createMapInMap(t *testing.T, typ MapType) *Map {
t.Helper()
spec := &MapSpec{
Type: typ,
KeySize: 4,
MaxEntries: 2,
InnerMap: &MapSpec{