/
svi.go
298 lines (289 loc) · 10.4 KB
/
svi.go
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// SPDX-License-Identifier: Apache-2.0
// Copyright (c) 2022-2023 Intel Corporation, or its subsidiaries.
// Copyright (c) 2022-2023 Dell Inc, or its subsidiaries.
// Package evpn is the main package of the application
package evpn
import (
"context"
"encoding/binary"
"fmt"
"log"
"net"
"path"
"github.com/vishvananda/netlink"
pb "github.com/opiproject/opi-api/network/evpn-gw/v1alpha1/gen/go"
"go.einride.tech/aip/fieldbehavior"
"go.einride.tech/aip/fieldmask"
"go.einride.tech/aip/resourceid"
"go.einride.tech/aip/resourcename"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
"google.golang.org/protobuf/proto"
"google.golang.org/protobuf/types/known/emptypb"
)
// CreateSvi executes the creation of the VLAN
func (s *Server) CreateSvi(_ context.Context, in *pb.CreateSviRequest) (*pb.Svi, error) {
log.Printf("CreateSvi: Received from client: %v", in)
// check required fields
if err := fieldbehavior.ValidateRequiredFields(in); err != nil {
log.Printf("error: %v", err)
return nil, err
}
// see https://google.aip.dev/133#user-specified-ids
resourceID := resourceid.NewSystemGenerated()
if in.SviId != "" {
err := resourceid.ValidateUserSettable(in.SviId)
if err != nil {
log.Printf("error: %v", err)
return nil, err
}
log.Printf("client provided the ID of a resource %v, ignoring the name field %v", in.SviId, in.Svi.Name)
resourceID = in.SviId
}
in.Svi.Name = resourceIDToFullName("svis", resourceID)
// idempotent API when called with same key, should return same object
obj, ok := s.Svis[in.Svi.Name]
if ok {
log.Printf("Already existing Svi with id %v", in.Svi.Name)
return obj, nil
}
// Validate that a LogicalBridge resource name conforms to the restrictions outlined in AIP-122.
if err := resourcename.Validate(in.Svi.Spec.LogicalBridge); err != nil {
log.Printf("error: %v", err)
return nil, err
}
// Validate that a Vrf resource name conforms to the restrictions outlined in AIP-122.
if err := resourcename.Validate(in.Svi.Spec.Vrf); err != nil {
log.Printf("error: %v", err)
return nil, err
}
// now get LogicalBridge object to fetch VID field
bridgeObject, ok := s.Bridges[in.Svi.Spec.LogicalBridge]
if !ok {
err := status.Errorf(codes.NotFound, "unable to find key %s", in.Svi.Spec.LogicalBridge)
log.Printf("error: %v", err)
return nil, err
}
// now get Vrf to plug this vlandev into
vrf, ok := s.Vrfs[in.Svi.Spec.Vrf]
if !ok {
err := status.Errorf(codes.NotFound, "unable to find key %s", in.Svi.Spec.Vrf)
log.Printf("error: %v", err)
return nil, err
}
// not found, so create a new one
bridge, err := s.nLink.LinkByName(tenantbridgeName)
if err != nil {
err := status.Errorf(codes.NotFound, "unable to find key %s", tenantbridgeName)
log.Printf("error: %v", err)
return nil, err
}
vid := uint16(bridgeObject.Spec.VlanId)
// Example: bridge vlan add dev br-tenant vid <vlan-id> self
if err := s.nLink.BridgeVlanAdd(bridge, vid, false, false, true, false); err != nil {
fmt.Printf("Failed to add vlan to bridge: %v", err)
return nil, err
}
// Example: ip link add link br-tenant name <link_svi> type vlan id <vlan-id>
vlanName := fmt.Sprintf("vlan%d", vid)
vlandev := &netlink.Vlan{LinkAttrs: netlink.LinkAttrs{Name: vlanName, ParentIndex: bridge.Attrs().Index}, VlanId: int(vid)}
log.Printf("Creating VLAN %v", vlandev)
if err := s.nLink.LinkAdd(vlandev); err != nil {
fmt.Printf("Failed to create vlan link: %v", err)
return nil, err
}
// Example: ip link set <link_svi> addr aa:bb:cc:00:00:41
if len(in.Svi.Spec.MacAddress) > 0 {
if err := s.nLink.LinkSetHardwareAddr(vlandev, in.Svi.Spec.MacAddress); err != nil {
fmt.Printf("Failed to set MAC on link: %v", err)
return nil, err
}
}
// Example: ip address add <svi-ip-with prefixlength> dev <link_svi>
for _, gwip := range in.Svi.Spec.GwIpPrefix {
fmt.Printf("Assign the GW IP address %v to the SVI interface %v", gwip, vlandev)
myip := make(net.IP, 4)
binary.BigEndian.PutUint32(myip, gwip.Addr.GetV4Addr())
addr := &netlink.Addr{IPNet: &net.IPNet{IP: myip, Mask: net.CIDRMask(int(gwip.Len), 32)}}
if err := s.nLink.AddrAdd(vlandev, addr); err != nil {
fmt.Printf("Failed to set IP on link: %v", err)
return nil, err
}
}
// get net device by name
vrfdev, err := s.nLink.LinkByName(path.Base(vrf.Name))
if err != nil {
err := status.Errorf(codes.NotFound, "unable to find key %s", vrf.Name)
log.Printf("error: %v", err)
return nil, err
}
// Example: ip link set <link_svi> master <vrf-name> up
if err := s.nLink.LinkSetMaster(vlandev, vrfdev); err != nil {
fmt.Printf("Failed to add vlandev to vrf: %v", err)
return nil, err
}
// Example: ip link set <link_svi> up
if err := s.nLink.LinkSetUp(vlandev); err != nil {
fmt.Printf("Failed to up link: %v", err)
return nil, err
}
response := proto.Clone(in.Svi).(*pb.Svi)
response.Status = &pb.SviStatus{OperStatus: pb.SVIOperStatus_SVI_OPER_STATUS_UP}
s.Svis[in.Svi.Name] = response
log.Printf("CreateSvi: Sending to client: %v", response)
return response, nil
}
// DeleteSvi deletes a VLAN
func (s *Server) DeleteSvi(_ context.Context, in *pb.DeleteSviRequest) (*emptypb.Empty, error) {
log.Printf("DeleteSvi: Received from client: %v", in)
// check required fields
if err := fieldbehavior.ValidateRequiredFields(in); err != nil {
log.Printf("error: %v", err)
return nil, err
}
// Validate that a resource name conforms to the restrictions outlined in AIP-122.
if err := resourcename.Validate(in.Name); err != nil {
log.Printf("error: %v", err)
return nil, err
}
// fetch object from the database
obj, ok := s.Svis[in.Name]
if !ok {
if in.AllowMissing {
return &emptypb.Empty{}, nil
}
err := status.Errorf(codes.NotFound, "unable to find key %s", in.Name)
log.Printf("error: %v", err)
return nil, err
}
// use netlink to find br-tenant
bridge, err := s.nLink.LinkByName(tenantbridgeName)
if err != nil {
err := status.Errorf(codes.NotFound, "unable to find key %s", tenantbridgeName)
log.Printf("error: %v", err)
return nil, err
}
// use netlink to find VlanId from LogicalBridge object
bridgeObject, ok := s.Bridges[obj.Spec.LogicalBridge]
if !ok {
err := status.Errorf(codes.NotFound, "unable to find key %s", obj.Spec.LogicalBridge)
log.Printf("error: %v", err)
return nil, err
}
vid := uint16(bridgeObject.Spec.VlanId)
// Example: bridge vlan del dev br-tenant vid <vlan-id> self
if err := s.nLink.BridgeVlanDel(bridge, vid, false, false, true, false); err != nil {
fmt.Printf("Failed to del vlan to bridge: %v", err)
return nil, err
}
vlanName := fmt.Sprintf("vlan%d", vid)
vlandev, err := s.nLink.LinkByName(vlanName)
if err != nil {
err := status.Errorf(codes.NotFound, "unable to find key %s", vlanName)
log.Printf("error: %v", err)
return nil, err
}
log.Printf("Deleting VLAN %v", vlandev)
// bring link down
if err := s.nLink.LinkSetDown(vlandev); err != nil {
fmt.Printf("Failed to up link: %v", err)
return nil, err
}
// use netlink to delete vlan
if err := s.nLink.LinkDel(vlandev); err != nil {
fmt.Printf("Failed to delete link: %v", err)
return nil, err
}
// remove from the Database
delete(s.Svis, obj.Name)
return &emptypb.Empty{}, nil
}
// UpdateSvi updates an VLAN
func (s *Server) UpdateSvi(_ context.Context, in *pb.UpdateSviRequest) (*pb.Svi, error) {
log.Printf("UpdateSvi: Received from client: %v", in)
// check required fields
if err := fieldbehavior.ValidateRequiredFields(in); err != nil {
log.Printf("error: %v", err)
return nil, err
}
// Validate that a resource name conforms to the restrictions outlined in AIP-122.
if err := resourcename.Validate(in.Svi.Name); err != nil {
log.Printf("error: %v", err)
return nil, err
}
// fetch object from the database
svi, ok := s.Svis[in.Svi.Name]
if !ok {
// TODO: introduce "in.AllowMissing" field. In case "true", create a new resource, don't return error
err := status.Errorf(codes.NotFound, "unable to find key %s", in.Svi.Name)
log.Printf("error: %v", err)
return nil, err
}
// update_mask = 2
if err := fieldmask.Validate(in.UpdateMask, in.Svi); err != nil {
log.Printf("error: %v", err)
return nil, err
}
// use netlink to find VlanId from LogicalBridge object
bridgeObject, ok := s.Bridges[svi.Spec.LogicalBridge]
if !ok {
err := status.Errorf(codes.NotFound, "unable to find key %s", svi.Spec.LogicalBridge)
log.Printf("error: %v", err)
return nil, err
}
vlanName := fmt.Sprintf("vlan%d", bridgeObject.Spec.VlanId)
iface, err := s.nLink.LinkByName(vlanName)
if err != nil {
err := status.Errorf(codes.NotFound, "unable to find key %s", vlanName)
log.Printf("error: %v", err)
return nil, err
}
// base := iface.Attrs()
// iface.MTU = 1500 // TODO: remove this, just an example
if err := s.nLink.LinkModify(iface); err != nil {
fmt.Printf("Failed to update link: %v", err)
return nil, err
}
response := proto.Clone(in.Svi).(*pb.Svi)
response.Status = &pb.SviStatus{OperStatus: pb.SVIOperStatus_SVI_OPER_STATUS_UP}
s.Svis[in.Svi.Name] = response
log.Printf("UpdateSvi: Sending to client: %v", response)
return response, nil
}
// GetSvi gets an VLAN
func (s *Server) GetSvi(_ context.Context, in *pb.GetSviRequest) (*pb.Svi, error) {
log.Printf("GetSvi: Received from client: %v", in)
// check required fields
if err := fieldbehavior.ValidateRequiredFields(in); err != nil {
log.Printf("error: %v", err)
return nil, err
}
// Validate that a resource name conforms to the restrictions outlined in AIP-122.
if err := resourcename.Validate(in.Name); err != nil {
log.Printf("error: %v", err)
return nil, err
}
// fetch object from the database
obj, ok := s.Svis[in.Name]
if !ok {
err := status.Errorf(codes.NotFound, "unable to find key %s", in.Name)
log.Printf("error: %v", err)
return nil, err
}
// use netlink to find VlanId from LogicalBridge object
bridgeObject, ok := s.Bridges[obj.Spec.LogicalBridge]
if !ok {
err := status.Errorf(codes.NotFound, "unable to find key %s", obj.Spec.LogicalBridge)
log.Printf("error: %v", err)
return nil, err
}
vlanName := fmt.Sprintf("vlan%d", bridgeObject.Spec.VlanId)
_, err := s.nLink.LinkByName(vlanName)
if err != nil {
err := status.Errorf(codes.NotFound, "unable to find key %s", vlanName)
log.Printf("error: %v", err)
return nil, err
}
// TODO
return &pb.Svi{Name: in.Name, Spec: &pb.SviSpec{MacAddress: obj.Spec.MacAddress, EnableBgp: obj.Spec.EnableBgp, RemoteAs: obj.Spec.RemoteAs}, Status: &pb.SviStatus{OperStatus: pb.SVIOperStatus_SVI_OPER_STATUS_UP}}, nil
}