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rdma.go
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rdma.go
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package main
import (
"bytes"
"context"
"fmt"
"io/ioutil"
"strconv"
"strings"
"github.com/hustcat/k8s-rdma-device-plugin/ibverbs"
pluginapi "k8s.io/kubernetes/pkg/kubelet/apis/deviceplugin/v1beta1"
)
const (
RdmaDeviceRource = "/sys/class/infiniband/%s/device/resource"
NetDeviceRource = "/sys/class/net/%s/device/resource"
RdmaDeviceNumaNode = "/sys/class/infiniband/%s/device/numa_node"
)
func GetDevices(masterNetDevice string) ([]Device, error) {
if masterNetDevice == "" {
return getAllRdmaDeivces()
} else {
return getRdmaDeivces(masterNetDevice)
}
}
func getAllRdmaDeivces() ([]Device, error) {
var devs []Device
// Get all RDMA device list
ibvDevList, err := ibverbs.IbvGetDeviceList()
if err != nil {
return nil, err
}
netDevList, err := GetAllNetDevice()
if err != nil {
return nil, err
}
for _, d := range ibvDevList {
for _, n := range netDevList {
dResource, err := getRdmaDeviceResoure(d.Name)
if err != nil {
return nil, err
}
nResource, err := getNetDeviceResoure(n)
if err != nil {
return nil, err
}
nn, err := getRdmaDeviceNumaNode(d.Name)
if err != nil {
return nil, err
}
// the same device
if bytes.Compare(dResource, nResource) == 0 {
devs = append(devs, Device{
RdmaDevice: d,
NetDevice: n,
NumaNode: int64(nn),
})
}
}
}
return devs, nil
}
func getRdmaDeivces(masterNetDevice string) ([]Device, error) {
var devs []Device
// Get all RDMA device list
ibvDevList, err := ibverbs.IbvGetDeviceList()
if err != nil {
return nil, err
}
netDevList, err := GetVfNetDevice(masterNetDevice)
if err != nil {
return nil, err
}
for _, d := range ibvDevList {
for _, n := range netDevList {
dResource, err := getRdmaDeviceResoure(d.Name)
if err != nil {
return nil, err
}
nResource, err := getNetDeviceResoure(n)
if err != nil {
return nil, err
}
nn, err := getRdmaDeviceNumaNode(d.Name)
if err != nil {
return nil, err
}
// the same device
if bytes.Compare(dResource, nResource) == 0 {
devs = append(devs, Device{
RdmaDevice: d,
NetDevice: n,
NumaNode: int64(nn),
})
}
}
}
return devs, nil
}
func getRdmaDeviceResoure(name string) ([]byte, error) {
resourceFile := fmt.Sprintf(RdmaDeviceRource, name)
data, err := ioutil.ReadFile(resourceFile)
return data, err
}
func getNetDeviceResoure(name string) ([]byte, error) {
resourceFile := fmt.Sprintf(NetDeviceRource, name)
data, err := ioutil.ReadFile(resourceFile)
return data, err
}
func getRdmaDeviceNumaNode(name string) (int, error) {
numaNodeFile := fmt.Sprintf(RdmaDeviceNumaNode, name)
data, err := ioutil.ReadFile(numaNodeFile)
if err != nil {
return 0, err
}
dataStr := string(data)
dataStr = strings.TrimSuffix(dataStr, "\n")
return strconv.Atoi(dataStr)
}
func deviceExists(devs []*pluginapi.Device, id string) bool {
for _, d := range devs {
if d.ID == id {
return true
}
}
return false
}
func watchXIDs(ctx context.Context, devs []*pluginapi.Device, xids chan<- *pluginapi.Device) {
for {
select {
case <-ctx.Done():
return
}
// TODO: check RDMA device healthy status
}
}