ITQC/containernetworking-plugins
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host-device: Add support for DPDK device (#490)

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This commit would make host-device plugin as a placeholder
for DPDK device when applications wants to attach it with
a pod container through network attachment definition.

Signed-off-by: Periyasamy Palanisamy <periyasamy.palanisamy@est.tech>
This commit is contained in:
peri 2021-01-20 17:35:42 +01:00 committed by GitHub
parent 7dc7a002cf
commit d41acb83c4
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 42 additions and 0 deletions
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42
plugins/main/host-device/host-device.go
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@ -43,6 +43,9 @@ const (
sysBusPCI = "/sys/bus/pci/devices"
)
// Array of different linux drivers bound to network device needed for DPDK
var userspaceDrivers = []string{"vfio-pci", "uio_pci_generic", "igb_uio"}
//NetConf for host-device config, look the README to learn how to use those parameters
type NetConf struct {
types.NetConf
@ -91,6 +94,16 @@ func cmdAdd(args *skel.CmdArgs) error {
}
defer containerNs.Close()
if len(cfg.PCIAddr) > 0 {
isDpdkMode, err := hasDpdkDriver(cfg.PCIAddr)
if err != nil {
return fmt.Errorf("error with host device: %v", err)
}
if isDpdkMode {
return types.PrintResult(&current.Result{}, cfg.CNIVersion)
}
}
hostDev, err := getLink(cfg.Device, cfg.HWAddr, cfg.KernelPath, cfg.PCIAddr)
if err != nil {
return fmt.Errorf("failed to find host device: %v", err)
@ -168,6 +181,16 @@ func cmdDel(args *skel.CmdArgs) error {
}
defer containerNs.Close()
if len(cfg.PCIAddr) > 0 {
isDpdkMode, err := hasDpdkDriver(cfg.PCIAddr)
if err != nil {
return fmt.Errorf("error with host device: %v", err)
}
if isDpdkMode {
return nil
}
}
if err := moveLinkOut(containerNs, args.IfName); err != nil {
return err
}
@ -255,6 +278,25 @@ func moveLinkOut(containerNs ns.NetNS, ifName string) error {
})
}
func hasDpdkDriver(pciaddr string) (bool, error) {
driverLink := filepath.Join(sysBusPCI, pciaddr, "driver")
driverPath, err := filepath.EvalSymlinks(driverLink)
if err != nil {
return false, err
}
driverStat, err := os.Stat(driverPath)
if err != nil {
return false, err
}
driverName := driverStat.Name()
for _, drv := range userspaceDrivers {
if driverName == drv {
return true, nil
}
}
return false, nil
}
func printLink(dev netlink.Link, cniVersion string, containerNs ns.NetNS) error {
result := current.Result{
CNIVersion: current.ImplementedSpecVersion,