k8s 上简单实现deviceplugin demo

device.go

@@ -0,0 +1,171 @@
+package main
+
+import (
+	"fmt"
+	"io/ioutil"
+	"os"
+	"path"
+	"strconv"
+	"strings"
+
+	pluginapi "k8s.io/kubelet/pkg/apis/deviceplugin/v1beta1"
+)
+
+const (
+	// SysfsDevices   = "/sys/bus/pci/devices"
+	SysfsDevices   = "/root/demo"
+	MgmtPrefix     = "/dev/xclmgmt"
+	UserPrefix     = "/dev/dri"
+	QdmaPrefix     = "/dev/xfpga"
+	QDMASTR        = "dma.qdma.u"
+	UserPFKeyword  = "drm"
+	DRMSTR         = "renderD"
+	ROMSTR         = "rom"
+	SNSTR          = "xmc.u."
+	DSAverFile     = "VBNV"
+	DSAtsFile      = "timestamp"
+	InstanceFile   = "instance"
+	MgmtFile       = "mgmt_pf"
+	UserFile       = "user_pf"
+	VendorFile     = "vendor"
+	DeviceFile     = "device"
+	SNFile         = "serial_num"
+	VtShell        = "xilinx_u30"
+	U30CommonShell = "ama_u30"
+	XilinxVendorID = "0x10ee"
+	ADVANTECH_ID   = "0x13fe"
+	AWS_ID         = "0x1d0f"
+	AristaVendorID = "0x3475"
+)
+
+type Pairs struct {
+	Mgmt string
+	User string
+	Qdma string
+}
+
+type Device struct {
+	index    string
+	deviceID string //devid of the user pf
+	Healthy  string
+	SN       string
+}
+
+func GetInstance(DBDF string) (string, error) {
+	strArray := strings.Split(DBDF, ":")
+	domain, err := strconv.ParseUint(strArray[0], 16, 16)
+	if err != nil {
+		return "", fmt.Errorf("strconv failed: %s\n", strArray[0])
+	}
+	bus, err := strconv.ParseUint(strArray[1], 16, 8)
+	if err != nil {
+		return "", fmt.Errorf("strconv failed: %s\n", strArray[1])
+	}
+	strArray = strings.Split(strArray[2], ".")
+	dev, err := strconv.ParseUint(strArray[0], 16, 8)
+	if err != nil {
+		return "", fmt.Errorf("strconv failed: %s\n", strArray[0])
+	}
+	fc, err := strconv.ParseUint(strArray[1], 16, 8)
+	if err != nil {
+		return "", fmt.Errorf("strconv failed: %s\n", strArray[1])
+	}
+	ret := domain*65536 + bus*256 + dev*8 + fc
+	return strconv.FormatUint(ret, 10), nil
+}
+
+func GetFileNameFromPrefix(dir string, prefix string) (string, error) {
+	userFiles, err := ioutil.ReadDir(dir)
+	if err != nil {
+		return "", fmt.Errorf("Can't read folder %s", dir)
+	}
+	for _, userFile := range userFiles {
+		fname := userFile.Name()
+
+		if !strings.HasPrefix(fname, prefix) {
+			continue
+		}
+		return fname, nil
+	}
+	return "", nil
+}
+
+func GetFileContent(file string) (string, error) {
+	if buf, err := ioutil.ReadFile(file); err != nil {
+		return "", fmt.Errorf("Can't read file %s", file)
+	} else {
+		ret := strings.Trim(string(buf), "\n")
+		return ret, nil
+	}
+}
+
+func FileExist(fname string) bool {
+	if _, err := os.Stat(fname); err != nil {
+		if os.IsNotExist(err) {
+			return false
+		}
+	}
+	return true
+}
+
+func IsMgmtPf(pciID string) bool {
+	fname := path.Join(SysfsDevices, pciID, MgmtFile)
+	return FileExist(fname)
+}
+
+func IsUserPf(pciID string) bool {
+	fname := path.Join(SysfsDevices, pciID, UserFile)
+	return FileExist(fname)
+}
+
+func GetDevices() ([]Device, error) {
+	var devices []Device
+	pciFiles, err := ioutil.ReadDir(SysfsDevices)
+	if err != nil {
+		return nil, fmt.Errorf("Can't read folder %s", SysfsDevices)
+	}
+
+	for _, pciFile := range pciFiles {
+		pciID := pciFile.Name()
+		// get device id
+		fname := path.Join(SysfsDevices, pciID, DeviceFile)
+		content, err := GetFileContent(fname)
+		if err != nil {
+			return nil, err
+		}
+		devid := content
+		fname = path.Join(SysfsDevices, pciID, "SN")
+		content, err = GetFileContent(fname)
+		if err != nil {
+			return nil, err
+		}
+		sn := content
+		healthy := pluginapi.Healthy
+		devices = append(devices, Device{
+			index:    strconv.Itoa(len(devices) + 1),
+			deviceID: devid,
+			Healthy:  healthy,
+			SN:       sn,
+		})
+	}
+	return devices, nil
+}
+
+// func main() {
+// 	devices, err := GetDevices()
+// 	if err != nil {
+// 		fmt.Printf("%s !!!\n", err)
+// 		return
+// 	}
+// 	//SNFolder, err := GetFileNameFromPrefix(path.Join(SysfsDevices, "0000:e3:00.1"), SNSTR)
+// 	//fname := path.Join(SysfsDevices, "0000:e3:00.1", SNFolder, SNFile)
+// 	//content, err := GetFileContent(fname)
+// 	//SN := content
+// 	//fmt.Printf("SN: %v \n", SN)
+// 	for _, device := range devices {
+// 		fmt.Printf("Device: %v \n", device)
+// 		fmt.Printf("ID: %s  \n\n", device.deviceID)
+// 		fmt.Printf("SN: %s  \n\n", device.SN)
+// 		fmt.Printf("Heathy: %s  \n\n", device.Healthy)
+// 	}
+// }