map_test.go

Documentation: github.com/cilium/ebpf/features

     1  package features
     2  
     3  import (
     4  	"fmt"
     5  	"math"
     6  	"os"
     7  	"testing"
     8  
     9  	"github.com/cilium/ebpf"
    10  	"github.com/cilium/ebpf/internal/testutils"
    11  )
    12  
    13  var mapTypeMinVersion = map[ebpf.MapType]string{
    14  	ebpf.Hash:                "3.19",
    15  	ebpf.Array:               "3.19",
    16  	ebpf.ProgramArray:        "4.2",
    17  	ebpf.PerfEventArray:      "4.3",
    18  	ebpf.PerCPUHash:          "4.6",
    19  	ebpf.PerCPUArray:         "4.6",
    20  	ebpf.StackTrace:          "4.6",
    21  	ebpf.CGroupArray:         "4.8",
    22  	ebpf.LRUHash:             "4.10",
    23  	ebpf.LRUCPUHash:          "4.10",
    24  	ebpf.LPMTrie:             "4.11",
    25  	ebpf.ArrayOfMaps:         "4.12",
    26  	ebpf.HashOfMaps:          "4.12",
    27  	ebpf.DevMap:              "4.14",
    28  	ebpf.SockMap:             "4.14",
    29  	ebpf.CPUMap:              "4.15",
    30  	ebpf.XSKMap:              "4.18",
    31  	ebpf.SockHash:            "4.18",
    32  	ebpf.CGroupStorage:       "4.19",
    33  	ebpf.ReusePortSockArray:  "4.19",
    34  	ebpf.PerCPUCGroupStorage: "4.20",
    35  	ebpf.Queue:               "4.20",
    36  	ebpf.Stack:               "4.20",
    37  	ebpf.SkStorage:           "5.2",
    38  	ebpf.DevMapHash:          "5.4",
    39  	ebpf.StructOpsMap:        "5.6", // requires vmlinux BTF, skip for now
    40  	ebpf.RingBuf:             "5.8",
    41  	ebpf.InodeStorage:        "5.10",
    42  	ebpf.TaskStorage:         "5.11",
    43  }
    44  
    45  func TestHaveMapType(t *testing.T) {
    46  	for mt := ebpf.UnspecifiedMap + 1; mt <= mt.Max(); mt++ {
    47  		minVersion, ok := mapTypeMinVersion[mt]
    48  		if !ok {
    49  			// In cases were a new map type wasn't added to testCases
    50  			// we should make sure the test runs anyway and fails on old kernels
    51  			minVersion = "0.0"
    52  		}
    53  
    54  		feature := fmt.Sprintf("map type %s", mt.String())
    55  
    56  		t.Run(mt.String(), func(t *testing.T) {
    57  			if mt == ebpf.StructOpsMap {
    58  				t.Skip("Test for map type StructOpsMap requires working probe")
    59  			}
    60  
    61  			testutils.SkipOnOldKernel(t, minVersion, feature)
    62  
    63  			if err := HaveMapType(mt); err != nil {
    64  				t.Fatalf("Map type %s isn't supported even though kernel is at least %s: %v", mt.String(), minVersion, err)
    65  			}
    66  		})
    67  
    68  	}
    69  
    70  }
    71  
    72  func TestHaveMapTypeUnsupported(t *testing.T) {
    73  	if err := haveMapType(ebpf.MapType(math.MaxUint32)); err != ebpf.ErrNotSupported {
    74  		t.Fatalf("Expected ebpf.ErrNotSupported but was: %v", err)
    75  	}
    76  }
    77  
    78  func TestHaveMapTypeInvalid(t *testing.T) {
    79  	if err := HaveMapType(ebpf.MapType(math.MaxUint32)); err != os.ErrInvalid {
    80  		t.Fatalf("Expected os.ErrInvalid but was: %v", err)
    81  	}
    82  
    83  	if err := HaveMapType(ebpf.MapType(ebpf.StructOpsMap)); err == nil {
    84  		t.Fatal("Expected but was nil")
    85  	}
    86  }
    87
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