|
| 1 | +//go:build vbmctl |
| 2 | +// +build vbmctl |
| 3 | + |
| 4 | +package network |
| 5 | + |
| 6 | +import ( |
| 7 | + "context" |
| 8 | + "errors" |
| 9 | + "fmt" |
| 10 | + "log" |
| 11 | + |
| 12 | + vbmctlapi "github.com/metal3-io/baremetal-operator/test/vbmctl/pkg/api" |
| 13 | + "github.com/vishvananda/netlink" |
| 14 | +) |
| 15 | + |
| 16 | +var ErrVethExistsWithWrongParams = errors.New("veth interface exists with different parameters") |
| 17 | + |
| 18 | +func ConnectWithVeth(_ context.Context, network1 string, network2 string, vethpeer1 string, vethpeer2 string) error { |
| 19 | + // Get masters |
| 20 | + master1, err := netlink.LinkByName(network1) |
| 21 | + if err != nil { |
| 22 | + return fmt.Errorf("failed to get network interface %s: %w", network1, err) |
| 23 | + } |
| 24 | + master2, err := netlink.LinkByName(network2) |
| 25 | + if err != nil { |
| 26 | + return fmt.Errorf("failed to get network interface %s: %w", network2, err) |
| 27 | + } |
| 28 | + |
| 29 | + // Check if pair exists and has correct masters |
| 30 | + veth1, err1 := netlink.LinkByName(vethpeer1) |
| 31 | + veth2, err2 := netlink.LinkByName(vethpeer2) |
| 32 | + if err1 == nil && err2 == nil { |
| 33 | + // Return error if the masters is wrong. Someone has created and |
| 34 | + // configured the interfaces already, and we don't want to break their |
| 35 | + // configuration by modifying the interfaces. |
| 36 | + if veth1.Attrs().MasterIndex != master1.Attrs().Index { |
| 37 | + return ErrVethExistsWithWrongParams |
| 38 | + } |
| 39 | + if veth2.Attrs().MasterIndex != master2.Attrs().Index { |
| 40 | + return ErrVethExistsWithWrongParams |
| 41 | + } |
| 42 | + // Veth pair exists and has correct masters |
| 43 | + return nil |
| 44 | + } |
| 45 | + |
| 46 | + // Check for unknown errors |
| 47 | + var notFound netlink.LinkNotFoundError |
| 48 | + if !errors.As(err1, ¬Found) || !errors.As(err2, ¬Found) { |
| 49 | + return fmt.Errorf("error checking interfaces: %w AND %w", err1, err2) |
| 50 | + } |
| 51 | + |
| 52 | + la := netlink.NewLinkAttrs() |
| 53 | + la.Name = vethpeer1 |
| 54 | + veth := &netlink.Veth{ |
| 55 | + LinkAttrs: la, |
| 56 | + PeerName: vethpeer2, |
| 57 | + } |
| 58 | + err = netlink.LinkAdd(veth) |
| 59 | + if err != nil { |
| 60 | + return fmt.Errorf("could not add vethpair %s: %w", la.Name, err) |
| 61 | + } |
| 62 | + |
| 63 | + // Get the newly created interfaces and configure them |
| 64 | + veth1, err = netlink.LinkByName(vethpeer1) |
| 65 | + if err != nil { |
| 66 | + return fmt.Errorf("failed to get veth interface %s: %w", vethpeer1, err) |
| 67 | + } |
| 68 | + veth2, err = netlink.LinkByName(vethpeer2) |
| 69 | + if err != nil { |
| 70 | + return fmt.Errorf("failed to get veth interface %s: %w", vethpeer2, err) |
| 71 | + } |
| 72 | + |
| 73 | + if err := netlink.LinkSetUp(veth1); err != nil { |
| 74 | + return fmt.Errorf("failed to bring up veth interface %s: %w", vethpeer1, err) |
| 75 | + } |
| 76 | + if err := netlink.LinkSetUp(veth2); err != nil { |
| 77 | + return fmt.Errorf("failed to bring up veth interface %s: %w", vethpeer2, err) |
| 78 | + } |
| 79 | + |
| 80 | + if err := netlink.LinkSetMaster(veth1, master1); err != nil { |
| 81 | + return fmt.Errorf("failed to set master %s for veth %s: %w", network1, vethpeer1, err) |
| 82 | + } |
| 83 | + if err := netlink.LinkSetMaster(veth2, master2); err != nil { |
| 84 | + return fmt.Errorf("failed to set master %s for veth %s: %w", network2, vethpeer2, err) |
| 85 | + } |
| 86 | + return nil |
| 87 | +} |
| 88 | + |
| 89 | +func ConnectAllWithVeth(ctx context.Context, vethPairs []vbmctlapi.VethPair) error { |
| 90 | + createdPairs := make([]vbmctlapi.VethPair, 0, len(vethPairs)) |
| 91 | + for _, pair := range vethPairs { |
| 92 | + err := ConnectWithVeth(ctx, pair.Master1, pair.Master2, pair.Veth1, pair.Veth2) |
| 93 | + if err != nil { |
| 94 | + // Clean up previously created pairs |
| 95 | + log.Printf("Failed to create veth pair %s, cleaning up %d previously created pair(s)\n", pair.Veth1, len(createdPairs)) |
| 96 | + for _, created := range createdPairs { |
| 97 | + if delErr := DeleteLink(ctx, created.Veth1); delErr != nil { |
| 98 | + log.Printf("Warning: failed to clean up veth pair %s: %v\n", created.Veth1, delErr) |
| 99 | + } |
| 100 | + } |
| 101 | + return fmt.Errorf("failed to create veth pair %s: %w", pair.Veth1, err) |
| 102 | + } |
| 103 | + createdPairs = append(createdPairs, pair) |
| 104 | + } |
| 105 | + return nil |
| 106 | +} |
| 107 | + |
| 108 | +func DeleteLink(_ context.Context, link string) error { |
| 109 | + l, err := netlink.LinkByName(link) |
| 110 | + var notFound netlink.LinkNotFoundError |
| 111 | + if !errors.As(err, ¬Found) { |
| 112 | + log.Printf("cannot delete network interface, interface %s does not exist", link) |
| 113 | + return nil |
| 114 | + } |
| 115 | + if err != nil { |
| 116 | + return fmt.Errorf("failed to get network interface %s: %w", link, err) |
| 117 | + } |
| 118 | + |
| 119 | + if err := netlink.LinkDel(l); err != nil { |
| 120 | + return fmt.Errorf("failed to delete network interface %s: %w", link, err) |
| 121 | + } |
| 122 | + return nil |
| 123 | +} |
| 124 | + |
| 125 | +func DeleteAllVeth(ctx context.Context, vethPairs []vbmctlapi.VethPair) error { |
| 126 | + var lastErr error |
| 127 | + for _, pair := range vethPairs { |
| 128 | + if err := DeleteLink(ctx, pair.Veth1); err != nil { |
| 129 | + log.Printf("Error deleting veth pair %s: %v\n", pair.Veth1, err) |
| 130 | + lastErr = err |
| 131 | + } |
| 132 | + } |
| 133 | + return lastErr |
| 134 | +} |
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