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pcipool_netstatus.go
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pcipool_netstatus.go
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/*
* This file is part of the KubeVirt project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* Copyright 2022 Red Hat, Inc.
*
*/
package sriov
import (
"encoding/json"
"fmt"
)
type PCIAddressWithNetworkStatusPool struct {
networkPCIMap map[string]string
}
// NewPCIAddressPoolWithNetworkStatus creates a PCI address pool based on the networkPciMapPath volume
func NewPCIAddressPoolWithNetworkStatus(networkPCIMapBytes []byte) (*PCIAddressWithNetworkStatusPool, error) {
pool := &PCIAddressWithNetworkStatusPool{}
var networkPciMap map[string]string
err := json.Unmarshal(networkPCIMapBytes, &networkPciMap)
if err != nil {
return nil, fmt.Errorf("failed to unmarshal network-pci map %w", err)
}
pool.networkPCIMap = networkPciMap
return pool, nil
}
// Len returns the length of the pool.
func (p *PCIAddressWithNetworkStatusPool) Len() int {
if p == nil {
return 0
}
return len(p.networkPCIMap)
}
// Pop gets the next PCI address available to a particular SR-IOV network. The
// function makes sure that the allocated address is not allocated to other networks.
func (p *PCIAddressWithNetworkStatusPool) Pop(networkName string) (string, error) {
pciAddress, exists := p.networkPCIMap[networkName]
if !exists {
return "", fmt.Errorf("PCI-Address for SR-IOV network %q not found", networkName)
}
if pciAddress == "" {
return "", fmt.Errorf("failed to allocate SR-IOV PCI address for network %q", networkName)
}
delete(p.networkPCIMap, networkName)
return pciAddress, nil
}