github.com/vishvananda/netlink@v1.3.0/rdma_link_test.go (about)

     1  // +build linux
     2  
     3  package netlink
     4  
     5  import (
     6  	"io/ioutil"
     7  	"strings"
     8  	"testing"
     9  
    10  	"github.com/vishvananda/netns"
    11  )
    12  
    13  func setupRdmaKModule(t *testing.T, name string) {
    14  	skipUnlessRoot(t)
    15  	file, err := ioutil.ReadFile("/proc/modules")
    16  	if err != nil {
    17  		t.Fatal("Failed to open /proc/modules", err)
    18  	}
    19  	for _, line := range strings.Split(string(file), "\n") {
    20  		n := strings.Split(line, " ")[0]
    21  		if n == name {
    22  			return
    23  		}
    24  
    25  	}
    26  	t.Skipf("Test requires kmodule %q.", name)
    27  }
    28  
    29  func TestRdmaGetRdmaLink(t *testing.T) {
    30  	minKernelRequired(t, 4, 16)
    31  	setupRdmaKModule(t, "ib_core")
    32  	_, err := RdmaLinkByName("foo")
    33  	if err != nil {
    34  		t.Fatal(err)
    35  	}
    36  }
    37  
    38  func TestRdmaSetRdmaLinkName(t *testing.T) {
    39  	minKernelRequired(t, 4, 19)
    40  	setupRdmaKModule(t, "ib_core")
    41  	link, err := RdmaLinkByName("foo")
    42  	if err != nil {
    43  		t.Fatal(err)
    44  	}
    45  	// Set new name
    46  	err = RdmaLinkSetName(link, "bar")
    47  	if err != nil {
    48  		t.Fatal(err)
    49  	}
    50  	// Revert back to old name
    51  	err = RdmaLinkSetName(link, "foo")
    52  	if err != nil {
    53  		t.Fatal(err)
    54  	}
    55  }
    56  
    57  func TestRdmaSystemGetNetnsMode(t *testing.T) {
    58  	minKernelRequired(t, 5, 2)
    59  	setupRdmaKModule(t, "ib_core")
    60  
    61  	mode, err := RdmaSystemGetNetnsMode()
    62  	if err != nil {
    63  		t.Fatal(err)
    64  	}
    65  	t.Log("rdma system netns mode =", mode)
    66  }
    67  
    68  func TestRdmaSystemSetNetnsMode(t *testing.T) {
    69  	var newMode string
    70  	var mode string
    71  	var err error
    72  
    73  	minKernelRequired(t, 5, 2)
    74  	setupRdmaKModule(t, "ib_core")
    75  
    76  	mode, err = RdmaSystemGetNetnsMode()
    77  	if err != nil {
    78  		t.Fatal(err)
    79  	}
    80  	t.Log("current rdma system mode =", mode)
    81  
    82  	err = RdmaSystemSetNetnsMode(mode)
    83  	if err != nil {
    84  		t.Fatal(err)
    85  	}
    86  	// Flip the mode from current mode
    87  	if mode == "exclusive" {
    88  		RdmaSystemSetNetnsMode("shared")
    89  	} else {
    90  		RdmaSystemSetNetnsMode("exclusive")
    91  	}
    92  	newMode, err = RdmaSystemGetNetnsMode()
    93  	if err != nil {
    94  		t.Fatal(err)
    95  	}
    96  	t.Log("new rdma system mode =", newMode)
    97  
    98  	// Change back to original mode
    99  	err = RdmaSystemSetNetnsMode(mode)
   100  	if err != nil {
   101  		t.Fatal(err)
   102  	}
   103  }
   104  
   105  func TestRdmaLinkSetNsFd(t *testing.T) {
   106  	minKernelRequired(t, 5, 2)
   107  	setupRdmaKModule(t, "ib_core")
   108  
   109  	mode, err := RdmaSystemGetNetnsMode()
   110  	if err != nil {
   111  		t.Fatal(err)
   112  	}
   113  	t.Log("current rdma netns mode", mode)
   114  	err = RdmaSystemSetNetnsMode("exclusive")
   115  	if err != nil {
   116  		t.Fatal(err)
   117  	}
   118  	basens, err := netns.Get()
   119  	if err != nil {
   120  		RdmaSystemSetNetnsMode(mode)
   121  		t.Fatal("Failed to get basens")
   122  	}
   123  	defer basens.Close()
   124  
   125  	newns, err := netns.New()
   126  	if err != nil {
   127  		RdmaSystemSetNetnsMode(mode)
   128  		t.Fatal("Failed to create newns")
   129  	}
   130  
   131  	netns.Set(basens)
   132  	link, err := RdmaLinkByName("foo")
   133  	if err != nil {
   134  		// Remove the namespace as RDMA subsystem requires
   135  		// no namespace to exist when changing net namespace mode
   136  		newns.Close()
   137  		RdmaSystemSetNetnsMode(mode)
   138  		t.Fatal(err)
   139  	}
   140  	t.Log("rdma link: ", link)
   141  
   142  	err = RdmaLinkSetNsFd(link, uint32(newns))
   143  	if err != nil {
   144  		newns.Close()
   145  		RdmaSystemSetNetnsMode(mode)
   146  		t.Fatal(err)
   147  	}
   148  
   149  	newns.Close()
   150  	//Set the old mode back at start of the test
   151  	err = RdmaSystemSetNetnsMode(mode)
   152  	if err != nil {
   153  		t.Fatal(err)
   154  	}
   155  }
   156  
   157  func TestRdmaLinkList(t *testing.T) {
   158  	minKernelRequired(t, 4, 16)
   159  	setupRdmaKModule(t, "ib_core")
   160  	links, err := RdmaLinkList()
   161  	if err != nil {
   162  		t.Fatal(err)
   163  	}
   164  	t.Log("RDMA devices:")
   165  	for _, link := range links {
   166  		t.Logf("%d: %s", link.Attrs.Index, link.Attrs.Name)
   167  	}
   168  }
   169  
   170  func TestRdmaLinkAddAndDel(t *testing.T) {
   171  	// related commit is https://github.com/torvalds/linux/commit/3856ec4b93c9463d36ee39098dde1fbbd29ec6dd.
   172  	minKernelRequired(t, 5, 1)
   173  	setupRdmaKModule(t, "rdma_rxe")
   174  
   175  	checkPresence := func(name string, exist bool) {
   176  		links, err := RdmaLinkList()
   177  		if err != nil {
   178  			t.Fatal(err)
   179  		}
   180  
   181  		found := false
   182  		for _, link := range links {
   183  			if link.Attrs.Name == name {
   184  				found = true
   185  				break
   186  			}
   187  		}
   188  
   189  		if found != exist {
   190  			t.Fatalf("expected rdma link %s presence=%v, but got presence=%v", name, exist, found)
   191  		}
   192  	}
   193  
   194  	linkName := t.Name()
   195  
   196  	if err := RdmaLinkAdd(linkName, "rxe", "lo"); err != nil {
   197  		t.Fatal(err)
   198  	}
   199  
   200  	checkPresence(linkName, true)
   201  
   202  	if err := RdmaLinkDel(linkName); err != nil {
   203  		t.Fatal(err)
   204  	}
   205  
   206  	checkPresence(linkName, false)
   207  }