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ovn-nb-logical_router_policy.go
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ovn-nb-logical_router_policy.go
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package ovs
import (
"context"
"errors"
"fmt"
"reflect"
"github.com/ovn-org/libovsdb/client"
"github.com/ovn-org/libovsdb/model"
"github.com/ovn-org/libovsdb/ovsdb"
"github.com/scylladb/go-set/strset"
"k8s.io/klog/v2"
ovsclient "github.com/kubeovn/kube-ovn/pkg/ovsdb/client"
"github.com/kubeovn/kube-ovn/pkg/ovsdb/ovnnb"
"github.com/kubeovn/kube-ovn/pkg/util"
)
// AddLogicalRouterPolicy add a policy route to logical router
func (c *OVNNbClient) AddLogicalRouterPolicy(lrName string, priority int, match, action string, nextHops []string, externalIDs map[string]string) error {
fnFilter := func(policy *ovnnb.LogicalRouterPolicy) bool {
return policy.Priority == priority && policy.Match == match
}
policyList, err := c.listLogicalRouterPoliciesByFilter(lrName, fnFilter)
if err != nil {
return fmt.Errorf("get policy priority %d match %s in logical router %s: %v", priority, match, lrName, err)
}
var found bool
duplicate := make([]string, 0, len(policyList))
for _, policy := range policyList {
if found || policy.Action != action || !reflect.DeepEqual(policy.ExternalIDs, externalIDs) || (policy.Action == ovnnb.LogicalRouterPolicyActionReroute && !strset.New(nextHops...).IsEqual(strset.New(policy.Nexthops...))) {
duplicate = append(duplicate, policy.UUID)
} else {
found = true
}
}
for _, uuid := range duplicate {
if err = c.DeleteLogicalRouterPolicyByUUID(lrName, uuid); err != nil {
return err
}
}
if len(duplicate) == len(policyList) {
policy := c.newLogicalRouterPolicy(priority, match, action, nextHops, externalIDs)
if err := c.CreateLogicalRouterPolicies(lrName, policy); err != nil {
return fmt.Errorf("add policy to logical router %s: %v", lrName, err)
}
}
return nil
}
// CreateLogicalRouterPolicies create several logical router policy once
func (c *OVNNbClient) CreateLogicalRouterPolicies(lrName string, policies ...*ovnnb.LogicalRouterPolicy) error {
if len(policies) == 0 {
return nil
}
models := make([]model.Model, 0, len(policies))
policyUUIDs := make([]string, 0, len(policies))
for _, policy := range policies {
if policy != nil {
models = append(models, model.Model(policy))
policyUUIDs = append(policyUUIDs, policy.UUID)
}
}
createPoliciesOp, err := c.ovsDbClient.Create(models...)
if err != nil {
klog.Error(err)
return fmt.Errorf("generate operations for creating policies: %v", err)
}
policyAddOp, err := c.LogicalRouterUpdatePolicyOp(lrName, policyUUIDs, ovsdb.MutateOperationInsert)
if err != nil {
klog.Error(err)
return fmt.Errorf("generate operations for adding policies to logical router %s: %v", lrName, err)
}
ops := make([]ovsdb.Operation, 0, len(createPoliciesOp)+len(policyAddOp))
ops = append(ops, createPoliciesOp...)
ops = append(ops, policyAddOp...)
if err = c.Transact("lr-policies-add", ops); err != nil {
return fmt.Errorf("add policies to %s: %v", lrName, err)
}
return nil
}
// DeleteLogicalRouterPolicy delete policy from logical router
func (c *OVNNbClient) DeleteLogicalRouterPolicy(lrName string, priority int, match string) error {
policyList, err := c.GetLogicalRouterPolicy(lrName, priority, match, true)
if err != nil {
klog.Error(err)
return err
}
for _, p := range policyList {
if err := c.DeleteLogicalRouterPolicyByUUID(lrName, p.UUID); err != nil {
klog.Error(err)
return err
}
}
return nil
}
// DeleteLogicalRouterPolicy delete some policies from logical router once
func (c *OVNNbClient) DeleteLogicalRouterPolicies(lrName string, priority int, externalIDs map[string]string) error {
// remove policies from logical router
policies, err := c.ListLogicalRouterPolicies(lrName, priority, externalIDs, false)
if err != nil {
klog.Error(err)
return err
}
if len(policies) == 0 {
return nil
}
policiesUUIDs := make([]string, 0, len(policies))
for _, policy := range policies {
policiesUUIDs = append(policiesUUIDs, policy.UUID)
}
ops, err := c.LogicalRouterUpdatePolicyOp(lrName, policiesUUIDs, ovsdb.MutateOperationDelete)
if err != nil {
return fmt.Errorf("generate operations for removing policy %v from logical router %s: %v", policiesUUIDs, lrName, err)
}
if err = c.Transact("lr-policies-del", ops); err != nil {
return fmt.Errorf("delete logical router policy %v from logical router %s: %v", policiesUUIDs, lrName, err)
}
return nil
}
func (c *OVNNbClient) DeleteLogicalRouterPolicyByUUID(lrName, uuid string) error {
// remove policy from logical router
ops, err := c.LogicalRouterUpdatePolicyOp(lrName, []string{uuid}, ovsdb.MutateOperationDelete)
if err != nil {
return fmt.Errorf("generate operations for removing policy '%s' from logical router %s: %v", uuid, lrName, err)
}
if err = c.Transact("lr-policy-del", ops); err != nil {
return fmt.Errorf("delete logical router policy '%s' from logical router %s: %v", uuid, lrName, err)
}
return nil
}
func (c *OVNNbClient) DeleteLogicalRouterPolicyByNexthop(lrName string, priority int, nexthop string) error {
policyList, err := c.listLogicalRouterPoliciesByFilter(lrName, func(route *ovnnb.LogicalRouterPolicy) bool {
if route.Priority != priority {
return false
}
return (route.Nexthop != nil && *route.Nexthop == nexthop) || util.ContainsString(route.Nexthops, nexthop)
})
if err != nil {
klog.Error(err)
return err
}
for _, policy := range policyList {
if err = c.DeleteLogicalRouterPolicyByUUID(lrName, policy.UUID); err != nil {
return err
}
}
return nil
}
// ClearLogicalRouterPolicy clear policy from logical router once
func (c *OVNNbClient) ClearLogicalRouterPolicy(lrName string) error {
lr, err := c.GetLogicalRouter(lrName, false)
if err != nil {
return fmt.Errorf("get logical router %s: %v", lrName, err)
}
// clear logical router policy
lr.Policies = nil
ops, err := c.UpdateLogicalRouterOp(lr, &lr.Policies)
if err != nil {
return fmt.Errorf("generate operations for clear logical router %s policy: %v", lrName, err)
}
if err = c.Transact("lr-policy-clear", ops); err != nil {
return fmt.Errorf("clear logical router %s policy: %v", lrName, err)
}
return nil
}
// GetLogicalRouterPolicy get logical router policy by priority and match,
// be consistent with ovn-nbctl which priority and match determine one policy in logical router
func (c *OVNNbClient) GetLogicalRouterPolicy(lrName string, priority int, match string, ignoreNotFound bool) ([]*ovnnb.LogicalRouterPolicy, error) {
// this is necessary because may exist same priority and match policy in different logical router
if len(lrName) == 0 {
return nil, fmt.Errorf("the logical router name is required")
}
fnFilter := func(policy *ovnnb.LogicalRouterPolicy) bool {
return policy.Priority == priority && policy.Match == match
}
policyList, err := c.listLogicalRouterPoliciesByFilter(lrName, fnFilter)
if err != nil {
return nil, fmt.Errorf("get policy priority %d match %s in logical router %s: %v", priority, match, lrName, err)
}
// not found
if len(policyList) == 0 {
if ignoreNotFound {
return nil, nil
}
return nil, fmt.Errorf("not found policy priority %d match %s in logical router %s", priority, match, lrName)
}
return policyList, nil
}
// GetLogicalRouterPolicyByUUID get logical router policy by UUID
func (c *OVNNbClient) GetLogicalRouterPolicyByUUID(uuid string) (*ovnnb.LogicalRouterPolicy, error) {
ctx, cancel := context.WithTimeout(context.Background(), c.Timeout)
defer cancel()
policy := &ovnnb.LogicalRouterPolicy{UUID: uuid}
if err := c.Get(ctx, policy); err != nil {
return nil, err
}
return policy, nil
}
// GetLogicalRouterPoliciesByExtID get logical router policy route by external ID
func (c *OVNNbClient) GetLogicalRouterPoliciesByExtID(lrName, key, value string) ([]*ovnnb.LogicalRouterPolicy, error) {
fnFilter := func(policy *ovnnb.LogicalRouterPolicy) bool {
if len(policy.ExternalIDs) != 0 {
if _, ok := policy.ExternalIDs[key]; ok {
return policy.ExternalIDs[key] == value
}
}
return false
}
return c.listLogicalRouterPoliciesByFilter(lrName, fnFilter)
}
// ListLogicalRouterPolicies list route policy which match the given externalIDs
func (c *OVNNbClient) ListLogicalRouterPolicies(lrName string, priority int, externalIDs map[string]string, ignoreExtIDEmptyValue bool) ([]*ovnnb.LogicalRouterPolicy, error) {
return c.listLogicalRouterPoliciesByFilter(lrName, policyFilter(priority, externalIDs, ignoreExtIDEmptyValue))
}
// newLogicalRouterPolicy return logical router policy with basic information
func (c *OVNNbClient) newLogicalRouterPolicy(priority int, match, action string, nextHops []string, externalIDs map[string]string) *ovnnb.LogicalRouterPolicy {
return &ovnnb.LogicalRouterPolicy{
UUID: ovsclient.NamedUUID(),
Priority: priority,
Match: match,
Action: action,
Nexthops: nextHops,
ExternalIDs: externalIDs,
}
}
// policyFilter filter policies which match the given externalIDs
func policyFilter(priority int, externalIDs map[string]string, ignoreExtIDEmptyValue bool) func(policy *ovnnb.LogicalRouterPolicy) bool {
return func(policy *ovnnb.LogicalRouterPolicy) bool {
if len(policy.ExternalIDs) < len(externalIDs) {
return false
}
if len(policy.ExternalIDs) != 0 {
for k, v := range externalIDs {
// ignoreExtIDEmptyValue is used to the case below:
// if only key exist but not value in externalIDs, we should include this lsp,
// it's equal to shell command `ovn-nbctl --columns=xx find logical_router_policy external_ids:key!=\"\"`
if len(v) == 0 && ignoreExtIDEmptyValue {
if len(policy.ExternalIDs[k]) == 0 {
return false
}
} else {
if policy.ExternalIDs[k] != v {
return false
}
}
}
}
if priority >= 0 && priority != policy.Priority {
return false
}
return true
}
}
func (c *OVNNbClient) DeleteRouterPolicy(lr *ovnnb.LogicalRouter, uuid string) error {
ops, err := c.ovsDbClient.Where(lr).Mutate(lr, model.Mutation{
Field: &lr.Policies,
Mutator: ovsdb.MutateOperationDelete,
Value: []string{uuid},
})
if err != nil {
return fmt.Errorf("failed to generate delete operations for router %s: %v", uuid, err)
}
if err = c.Transact("lr-policy-delete", ops); err != nil {
return fmt.Errorf("failed to delete route policy %s: %v", uuid, err)
}
return nil
}
func (c *OVNNbClient) listLogicalRouterPoliciesByFilter(lrName string, filter func(route *ovnnb.LogicalRouterPolicy) bool) ([]*ovnnb.LogicalRouterPolicy, error) {
lr, err := c.GetLogicalRouter(lrName, false)
if err != nil {
klog.Error(err)
return nil, err
}
policyList := make([]*ovnnb.LogicalRouterPolicy, 0, len(lr.Policies))
for _, uuid := range lr.Policies {
policy, err := c.GetLogicalRouterPolicyByUUID(uuid)
if err != nil {
if errors.Is(err, client.ErrNotFound) {
continue
}
return nil, err
}
if filter == nil || filter(policy) {
policyList = append(policyList, policy)
}
}
return policyList, nil
}