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rdma_link_test.go
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rdma_link_test.go
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// +build linux
package netlink
import (
"io/ioutil"
"strings"
"testing"
"github.com/vishvananda/netns"
)
func setupRdmaKModule(t *testing.T, name string) {
skipUnlessRoot(t)
file, err := ioutil.ReadFile("/proc/modules")
if err != nil {
t.Fatal("Failed to open /proc/modules", err)
}
for _, line := range strings.Split(string(file), "\n") {
n := strings.Split(line, " ")[0]
if n == name {
return
}
}
t.Skipf("Test requires kmodule %q.", name)
}
func TestRdmaGetRdmaLink(t *testing.T) {
minKernelRequired(t, 4, 16)
setupRdmaKModule(t, "ib_core")
_, err := RdmaLinkByName("foo")
if err != nil {
t.Fatal(err)
}
}
func TestRdmaSetRdmaLinkName(t *testing.T) {
minKernelRequired(t, 4, 19)
setupRdmaKModule(t, "ib_core")
link, err := RdmaLinkByName("foo")
if err != nil {
t.Fatal(err)
}
// Set new name
err = RdmaLinkSetName(link, "bar")
if err != nil {
t.Fatal(err)
}
// Revert back to old name
err = RdmaLinkSetName(link, "foo")
if err != nil {
t.Fatal(err)
}
}
func TestRdmaSystemGetNetnsMode(t *testing.T) {
minKernelRequired(t, 5, 2)
setupRdmaKModule(t, "ib_core")
mode, err := RdmaSystemGetNetnsMode()
if err != nil {
t.Fatal(err)
}
t.Log("rdma system netns mode =", mode)
}
func TestRdmaSystemSetNetnsMode(t *testing.T) {
var newMode string
var mode string
var err error
minKernelRequired(t, 5, 2)
setupRdmaKModule(t, "ib_core")
mode, err = RdmaSystemGetNetnsMode()
if err != nil {
t.Fatal(err)
}
t.Log("current rdma system mode =", mode)
err = RdmaSystemSetNetnsMode(mode)
if err != nil {
t.Fatal(err)
}
// Flip the mode from current mode
if mode == "exclusive" {
RdmaSystemSetNetnsMode("shared")
} else {
RdmaSystemSetNetnsMode("exclusive")
}
newMode, err = RdmaSystemGetNetnsMode()
if err != nil {
t.Fatal(err)
}
t.Log("new rdma system mode =", newMode)
// Change back to original mode
err = RdmaSystemSetNetnsMode(mode)
if err != nil {
t.Fatal(err)
}
}
func TestRdmaLinkSetNsFd(t *testing.T) {
minKernelRequired(t, 5, 2)
setupRdmaKModule(t, "ib_core")
mode, err := RdmaSystemGetNetnsMode()
if err != nil {
t.Fatal(err)
}
t.Log("current rdma netns mode", mode)
err = RdmaSystemSetNetnsMode("exclusive")
if err != nil {
t.Fatal(err)
}
basens, err := netns.Get()
if err != nil {
RdmaSystemSetNetnsMode(mode)
t.Fatal("Failed to get basens")
}
defer basens.Close()
newns, err := netns.New()
if err != nil {
RdmaSystemSetNetnsMode(mode)
t.Fatal("Failed to create newns")
}
netns.Set(basens)
link, err := RdmaLinkByName("foo")
if err != nil {
// Remove the namespace as RDMA subsystem requires
// no namespace to exist when changing net namespace mode
newns.Close()
RdmaSystemSetNetnsMode(mode)
t.Fatal(err)
}
t.Log("rdma link: ", link)
err = RdmaLinkSetNsFd(link, uint32(newns))
if err != nil {
newns.Close()
RdmaSystemSetNetnsMode(mode)
t.Fatal(err)
}
newns.Close()
//Set the old mode back at start of the test
err = RdmaSystemSetNetnsMode(mode)
if err != nil {
t.Fatal(err)
}
}
func TestRdmaLinkList(t *testing.T) {
minKernelRequired(t, 4, 16)
setupRdmaKModule(t, "ib_core")
links, err := RdmaLinkList()
if err != nil {
t.Fatal(err)
}
t.Log("RDMA devices:")
for _, link := range links {
t.Logf("%d: %s", link.Attrs.Index, link.Attrs.Name)
}
}
func TestRdmaLinkAddAndDel(t *testing.T) {
// related commit is https://github.com/torvalds/linux/commit/3856ec4b93c9463d36ee39098dde1fbbd29ec6dd.
minKernelRequired(t, 5, 1)
setupRdmaKModule(t, "rdma_rxe")
checkPresence := func(name string, exist bool) {
links, err := RdmaLinkList()
if err != nil {
t.Fatal(err)
}
found := false
for _, link := range links {
if link.Attrs.Name == name {
found = true
break
}
}
if found != exist {
t.Fatalf("expected rdma link %s presence=%v, but got presence=%v", name, exist, found)
}
}
linkName := t.Name()
if err := RdmaLinkAdd(linkName, "rxe", "lo"); err != nil {
t.Fatal(err)
}
checkPresence(linkName, true)
if err := RdmaLinkDel(linkName); err != nil {
t.Fatal(err)
}
checkPresence(linkName, false)
}