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class_test.go
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class_test.go
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//go:build linux
// +build linux
package netlink
import (
"reflect"
"testing"
)
func SafeQdiscList(link Link) ([]Qdisc, error) {
qdiscs, err := QdiscList(link)
if err != nil {
return nil, err
}
result := []Qdisc{}
for _, qdisc := range qdiscs {
// fmt.Printf("%+v\n", qdisc)
// filter default qdisc created by kernel when custom one deleted
attrs := qdisc.Attrs()
if attrs.Handle == HANDLE_NONE && attrs.Parent == HANDLE_ROOT {
continue
}
result = append(result, qdisc)
}
return result, nil
}
func SafeClassList(link Link, handle uint32) ([]Class, error) {
classes, err := ClassList(link, handle)
if err != nil {
return nil, err
}
result := []Class{}
for ind := range classes {
double := false
for _, class2 := range classes[ind+1:] {
if classes[ind].Attrs().Handle == class2.Attrs().Handle {
double = true
}
}
if !double {
result = append(result, classes[ind])
}
}
return result, nil
}
func testClassStats(this, that *ClassStatistics, t *testing.T) {
ok := reflect.DeepEqual(this, that)
if !ok {
t.Fatalf("%#v is expected but it actually was %#v", that, this)
}
}
func TestClassAddDel(t *testing.T) {
tearDown := setUpNetlinkTest(t)
defer tearDown()
if err := LinkAdd(&Ifb{LinkAttrs{Name: "foo"}}); err != nil {
t.Fatal(err)
}
if err := LinkAdd(&Ifb{LinkAttrs{Name: "bar"}}); err != nil {
t.Fatal(err)
}
link, err := LinkByName("foo")
if err != nil {
t.Fatal(err)
}
if err := LinkSetUp(link); err != nil {
t.Fatal(err)
}
attrs := QdiscAttrs{
LinkIndex: link.Attrs().Index,
Handle: MakeHandle(0xffff, 0),
Parent: HANDLE_ROOT,
}
qdisc := NewHtb(attrs)
if err := QdiscAdd(qdisc); err != nil {
t.Fatal(err)
}
qdiscs, err := SafeQdiscList(link)
if err != nil {
t.Fatal(err)
}
if len(qdiscs) != 1 {
t.Fatal("Failed to add qdisc")
}
_, ok := qdiscs[0].(*Htb)
if !ok {
t.Fatal("Qdisc is the wrong type")
}
classattrs := ClassAttrs{
LinkIndex: link.Attrs().Index,
Parent: MakeHandle(0xffff, 0),
Handle: MakeHandle(0xffff, 2),
}
htbclassattrs := HtbClassAttrs{
Rate: 1234000,
Cbuffer: 1690,
Prio: 2,
Quantum: 1000,
}
class := NewHtbClass(classattrs, htbclassattrs)
if err := ClassAdd(class); err != nil {
t.Fatal(err)
}
classes, err := SafeClassList(link, MakeHandle(0xffff, 0))
if err != nil {
t.Fatal(err)
}
if len(classes) != 1 {
t.Fatal("Failed to add class")
}
htb, ok := classes[0].(*HtbClass)
if !ok {
t.Fatal("Class is the wrong type")
}
if htb.Rate != class.Rate {
t.Fatal("Rate doesn't match")
}
if htb.Ceil != class.Ceil {
t.Fatal("Ceil doesn't match")
}
if htb.Buffer != class.Buffer {
t.Fatal("Buffer doesn't match")
}
if htb.Cbuffer != class.Cbuffer {
t.Fatal("Cbuffer doesn't match")
}
if htb.Prio != class.Prio {
t.Fatal("Prio doesn't match")
}
if htb.Quantum != class.Quantum {
t.Fatal("Quantum doesn't match")
}
testClassStats(htb.ClassAttrs.Statistics, NewClassStatistics(), t)
qattrs := QdiscAttrs{
LinkIndex: link.Attrs().Index,
Handle: MakeHandle(0x2, 0),
Parent: MakeHandle(0xffff, 2),
}
nattrs := NetemQdiscAttrs{
Latency: 20000,
Loss: 23.4,
Duplicate: 14.3,
LossCorr: 8.34,
Jitter: 1000,
DelayCorr: 12.3,
ReorderProb: 23.4,
CorruptProb: 10.0,
CorruptCorr: 10,
}
qdiscnetem := NewNetem(qattrs, nattrs)
if err := QdiscAdd(qdiscnetem); err != nil {
t.Fatal(err)
}
qdiscs, err = SafeQdiscList(link)
if err != nil {
t.Fatal(err)
}
if len(qdiscs) != 2 {
t.Fatal("Failed to add qdisc")
}
_, ok = qdiscs[0].(*Htb)
if !ok {
t.Fatal("Qdisc is the wrong type")
}
netem, ok := qdiscs[1].(*Netem)
if !ok {
t.Fatal("Qdisc is the wrong type")
}
// Compare the record we got from the list with the one we created
if netem.Loss != qdiscnetem.Loss {
t.Fatal("Loss does not match")
}
if netem.Latency != qdiscnetem.Latency {
t.Fatal("Latency does not match")
}
if netem.CorruptProb != qdiscnetem.CorruptProb {
t.Fatal("CorruptProb does not match")
}
if netem.Jitter != qdiscnetem.Jitter {
t.Fatal("Jitter does not match")
}
if netem.LossCorr != qdiscnetem.LossCorr {
t.Fatal("Loss does not match")
}
if netem.DuplicateCorr != qdiscnetem.DuplicateCorr {
t.Fatal("DuplicateCorr does not match")
}
// Deletion
// automatically removes netem qdisc
if err := ClassDel(class); err != nil {
t.Fatal(err)
}
classes, err = SafeClassList(link, MakeHandle(0xffff, 0))
if err != nil {
t.Fatal(err)
}
if len(classes) != 0 {
t.Fatal("Failed to remove class")
}
if err := QdiscDel(qdisc); err != nil {
t.Fatal(err)
}
qdiscs, err = SafeQdiscList(link)
if err != nil {
t.Fatal(err)
}
if len(qdiscs) != 0 {
t.Fatal("Failed to remove qdisc")
}
}
func TestHtbClassAddHtbClassChangeDel(t *testing.T) {
/**
This test first set up a interface ans set up a Htb qdisc
A HTB class is attach to it and a Netem qdisc is attached to that class
Next, we test changing the HTB class in place and confirming the Netem is
still attached. We also check that invoting ClassChange with a non-existing
class will fail.
Finally, we test ClassReplace. We confirm it correctly behave like
ClassChange when the parent/handle pair exists and that it will create a
new class if the handle is modified.
*/
tearDown := setUpNetlinkTest(t)
defer tearDown()
if err := LinkAdd(&Ifb{LinkAttrs{Name: "foo"}}); err != nil {
t.Fatal(err)
}
link, err := LinkByName("foo")
if err != nil {
t.Fatal(err)
}
if err := LinkSetUp(link); err != nil {
t.Fatal(err)
}
attrs := QdiscAttrs{
LinkIndex: link.Attrs().Index,
Handle: MakeHandle(0xffff, 0),
Parent: HANDLE_ROOT,
}
qdisc := NewHtb(attrs)
if err := QdiscAdd(qdisc); err != nil {
t.Fatal(err)
}
qdiscs, err := SafeQdiscList(link)
if err != nil {
t.Fatal(err)
}
if len(qdiscs) != 1 {
t.Fatal("Failed to add qdisc")
}
_, ok := qdiscs[0].(*Htb)
if !ok {
t.Fatal("Qdisc is the wrong type")
}
classattrs := ClassAttrs{
LinkIndex: link.Attrs().Index,
Parent: MakeHandle(0xffff, 0),
Handle: MakeHandle(0xffff, 2),
}
htbclassattrs := HtbClassAttrs{
Rate: uint64(1<<32) + 10,
Ceil: uint64(1<<32) + 20,
Cbuffer: 1690,
}
class := NewHtbClass(classattrs, htbclassattrs)
if err := ClassAdd(class); err != nil {
t.Fatal(err)
}
classes, err := SafeClassList(link, 0)
if err != nil {
t.Fatal(err)
}
if len(classes) != 1 {
t.Fatal("Failed to add class")
}
htb, ok := classes[0].(*HtbClass)
if !ok {
t.Fatal("Class is the wrong type")
}
testClassStats(htb.ClassAttrs.Statistics, NewClassStatistics(), t)
qattrs := QdiscAttrs{
LinkIndex: link.Attrs().Index,
Handle: MakeHandle(0x2, 0),
Parent: MakeHandle(0xffff, 2),
}
nattrs := NetemQdiscAttrs{
Latency: 20000,
Loss: 23.4,
Duplicate: 14.3,
LossCorr: 8.34,
Jitter: 1000,
DelayCorr: 12.3,
ReorderProb: 23.4,
CorruptProb: 10.0,
CorruptCorr: 10,
}
qdiscnetem := NewNetem(qattrs, nattrs)
if err := QdiscAdd(qdiscnetem); err != nil {
t.Fatal(err)
}
qdiscs, err = SafeQdiscList(link)
if err != nil {
t.Fatal(err)
}
if len(qdiscs) != 2 {
t.Fatal("Failed to add qdisc")
}
_, ok = qdiscs[1].(*Netem)
if !ok {
t.Fatal("Qdisc is the wrong type")
}
// Change
// For change to work, the handle and parent cannot be changed.
// First, test it fails if we change the Handle.
oldHandle := classattrs.Handle
classattrs.Handle = MakeHandle(0xffff, 3)
class = NewHtbClass(classattrs, htbclassattrs)
if err := ClassChange(class); err == nil {
t.Fatal("ClassChange should not work when using a different handle.")
}
// It should work with the same handle
classattrs.Handle = oldHandle
htbclassattrs.Rate = 4321000
class = NewHtbClass(classattrs, htbclassattrs)
if err := ClassChange(class); err != nil {
t.Fatal(err)
}
classes, err = SafeClassList(link, MakeHandle(0xffff, 0))
if err != nil {
t.Fatal(err)
}
if len(classes) != 1 {
t.Fatalf(
"1 class expected, %d found",
len(classes),
)
}
htb, ok = classes[0].(*HtbClass)
if !ok {
t.Fatal("Class is the wrong type")
}
// Verify that the rate value has changed.
if htb.Rate != class.Rate {
t.Fatal("Rate did not get changed while changing the class.")
}
// Check that we still have the netem child qdisc
qdiscs, err = SafeQdiscList(link)
if err != nil {
t.Fatal(err)
}
if len(qdiscs) != 2 {
t.Fatalf("2 qdisc expected, %d found", len(qdiscs))
}
_, ok = qdiscs[0].(*Htb)
if !ok {
t.Fatal("Qdisc is the wrong type")
}
_, ok = qdiscs[1].(*Netem)
if !ok {
t.Fatal("Qdisc is the wrong type")
}
// Replace
// First replace by keeping the same handle, class will be changed.
// Then, replace by providing a new handle, n new class will be created.
// Replace acting as Change
class = NewHtbClass(classattrs, htbclassattrs)
if err := ClassReplace(class); err != nil {
t.Fatal("Failed to replace class that is existing.")
}
classes, err = SafeClassList(link, MakeHandle(0xffff, 0))
if err != nil {
t.Fatal(err)
}
if len(classes) != 1 {
t.Fatalf(
"1 class expected, %d found",
len(classes),
)
}
htb, ok = classes[0].(*HtbClass)
if !ok {
t.Fatal("Class is the wrong type")
}
// Verify that the rate value has changed.
if htb.Rate != class.Rate {
t.Fatal("Rate did not get changed while changing the class.")
}
// It should work with the same handle
classattrs.Handle = MakeHandle(0xffff, 3)
class = NewHtbClass(classattrs, htbclassattrs)
if err := ClassReplace(class); err != nil {
t.Fatal(err)
}
classes, err = SafeClassList(link, MakeHandle(0xffff, 0))
if err != nil {
t.Fatal(err)
}
if len(classes) != 2 {
t.Fatalf(
"2 classes expected, %d found",
len(classes),
)
}
htb, ok = classes[1].(*HtbClass)
if !ok {
t.Fatal("Class is the wrong type")
}
// Verify that the rate value has changed.
if htb.Rate != class.Rate {
t.Fatal("Rate did not get changed while changing the class.")
}
// Deletion
for _, class := range classes {
if err := ClassDel(class); err != nil {
t.Fatal(err)
}
}
classes, err = SafeClassList(link, MakeHandle(0xffff, 0))
if err != nil {
t.Fatal(err)
}
if len(classes) != 0 {
t.Fatal("Failed to remove class")
}
if err := QdiscDel(qdisc); err != nil {
t.Fatal(err)
}
qdiscs, err = SafeQdiscList(link)
if err != nil {
t.Fatal(err)
}
if len(qdiscs) != 0 {
t.Fatal("Failed to remove qdisc")
}
}
func TestClassHfsc(t *testing.T) {
// New network namespace for tests
tearDown := setUpNetlinkTestWithKModule(t, "sch_hfsc")
defer tearDown()
// Set up testing link and check if succeeded
if err := LinkAdd(&Ifb{LinkAttrs{Name: "foo"}}); err != nil {
t.Fatal(err)
}
link, err := LinkByName("foo")
if err != nil {
t.Fatal(err)
}
if err := LinkSetUp(link); err != nil {
t.Fatal(err)
}
// Adding HFSC qdisc
qdiscAttrs := QdiscAttrs{
LinkIndex: link.Attrs().Index,
Handle: MakeHandle(1, 0),
Parent: HANDLE_ROOT,
}
hfscQdisc := NewHfsc(qdiscAttrs)
hfscQdisc.Defcls = 2
err = QdiscAdd(hfscQdisc)
if err != nil {
t.Fatal(err)
}
qdiscs, err := SafeQdiscList(link)
if err != nil {
t.Fatal(err)
}
if len(qdiscs) != 1 {
t.Fatal("Failed to add qdisc")
}
_, ok := qdiscs[0].(*Hfsc)
if !ok {
t.Fatal("Qdisc is the wrong type")
}
// Adding some HFSC classes
classAttrs := ClassAttrs{
LinkIndex: link.Attrs().Index,
Parent: MakeHandle(1, 0),
Handle: MakeHandle(1, 1),
}
hfscClass := NewHfscClass(classAttrs)
hfscClass.SetLS(5e6, 10, 5e6)
err = ClassAdd(hfscClass)
if err != nil {
t.Fatal(err)
}
hfscClass2 := hfscClass
hfscClass2.SetLS(0, 0, 0)
hfscClass2.Attrs().Parent = MakeHandle(1, 1)
hfscClass2.Attrs().Handle = MakeHandle(1, 2)
hfscClass2.SetRsc(0, 0, 2e6)
err = ClassAdd(hfscClass2)
if err != nil {
t.Fatal(err)
}
hfscClass3 := hfscClass
hfscClass3.SetLS(0, 0, 0)
hfscClass3.Attrs().Parent = MakeHandle(1, 1)
hfscClass3.Attrs().Handle = MakeHandle(1, 3)
err = ClassAdd(hfscClass3)
if err != nil {
t.Fatal(err)
}
// Check the classes
classes, err := SafeClassList(link, MakeHandle(1, 0))
if err != nil {
t.Fatal(err)
}
if len(classes) != 4 {
t.Fatal("Failed to add classes")
}
for _, c := range classes {
class, ok := c.(*HfscClass)
if !ok {
t.Fatal("Wrong type of class")
}
if class.ClassAttrs.Handle == hfscClass.ClassAttrs.Handle {
if class.Fsc != hfscClass.Fsc {
t.Fatal("HfscClass FSC don't match")
}
if class.Usc != hfscClass.Usc {
t.Fatal("HfscClass USC don't match")
}
if class.Rsc != hfscClass.Rsc {
t.Fatal("HfscClass RSC don't match")
}
}
if class.ClassAttrs.Handle == hfscClass2.ClassAttrs.Handle {
if class.Fsc != hfscClass2.Fsc {
t.Fatal("HfscClass2 FSC don't match")
}
if class.Usc != hfscClass2.Usc {
t.Fatal("HfscClass2 USC don't match")
}
if class.Rsc != hfscClass2.Rsc {
t.Fatal("HfscClass2 RSC don't match")
}
}
if class.ClassAttrs.Handle == hfscClass3.ClassAttrs.Handle {
if class.Fsc != hfscClass3.Fsc {
t.Fatal("HfscClass3 FSC don't match")
}
if class.Usc != hfscClass3.Usc {
t.Fatal("HfscClass3 USC don't match")
}
if class.Rsc != hfscClass3.Rsc {
t.Fatal("HfscClass3 RSC don't match")
}
}
}
// Terminating the leafs with fq_codel qdiscs
fqcodelAttrs := QdiscAttrs{
LinkIndex: link.Attrs().Index,
Parent: MakeHandle(1, 2),
Handle: MakeHandle(2, 0),
}
fqcodel1 := NewFqCodel(fqcodelAttrs)
fqcodel1.ECN = 0
fqcodel1.Limit = 1200
fqcodel1.Flows = 65535
fqcodel1.Target = 5
err = QdiscAdd(fqcodel1)
if err != nil {
t.Fatal(err)
}
fqcodel2 := fqcodel1
fqcodel2.Attrs().Handle = MakeHandle(3, 0)
fqcodel2.Attrs().Parent = MakeHandle(1, 3)
err = QdiscAdd(fqcodel2)
if err != nil {
t.Fatal(err)
}
// Check the amount of qdiscs
qdiscs, _ = SafeQdiscList(link)
if len(qdiscs) != 3 {
t.Fatal("Failed to add qdisc")
}
for _, q := range qdiscs[1:] {
_, ok = q.(*FqCodel)
if !ok {
t.Fatal("Qdisc is the wrong type")
}
}
// removing a class
if err := ClassDel(hfscClass3); err != nil {
t.Fatal(err)
}
// Check the classes
classes, err = SafeClassList(link, MakeHandle(1, 0))
if err != nil {
t.Fatal(err)
}
if len(classes) != 3 {
t.Fatal("Failed to delete classes")
}
// Check qdisc
qdiscs, _ = SafeQdiscList(link)
if len(qdiscs) != 2 {
t.Fatal("Failed to delete qdisc")
}
// Changing a class
hfscClass2.SetRsc(0, 0, 0)
hfscClass2.SetSC(5e6, 100, 1e6)
hfscClass2.SetUL(6e6, 50, 2e6)
hfscClass2.Attrs().Handle = MakeHandle(1, 8)
if err := ClassChange(hfscClass2); err == nil {
t.Fatal("Class change shouldn't work with a different handle")
}
hfscClass2.Attrs().Handle = MakeHandle(1, 2)
if err := ClassChange(hfscClass2); err != nil {
t.Fatal(err)
}
// Replacing a class
// If the handle doesn't exist, create it
hfscClass2.SetSC(6e6, 100, 2e6)
hfscClass2.SetUL(8e6, 500, 4e6)
hfscClass2.Attrs().Handle = MakeHandle(1, 8)
if err := ClassReplace(hfscClass2); err != nil {
t.Fatal(err)
}
// If the handle exists, replace it
hfscClass.SetLS(5e6, 200, 1e6)
if err := ClassChange(hfscClass); err != nil {
t.Fatal(err)
}
}