mirror of
https://github.com/vishvananda/netlink.git
synced 2026-04-22 23:27:13 +08:00
Add functions to work with devlink device parameters
Functions added: DevlinkGetDeviceParams - get all parameters for device DevlinkGetDeviceParamByName - get specific parameter for device DevlinkSetDeviceParam - set parameter for device Signed-off-by: Yury Kulazhenkov <ykulazhenkov@nvidia.com>
This commit is contained in:
Yury Kulazhenkov
committed by
Alessandro Boch
Alessandro Boch
parent
857968af11
commit
5daafafd95
@@ -247,6 +247,107 @@ func (dlrs *DevlinkResources) parseAttributes(attrs map[uint16]syscall.NetlinkRo
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return nil
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}
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// DevlinkParam represents parameter of the device
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type DevlinkParam struct {
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Name string
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IsGeneric bool
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Type uint8 // possible values are in nl.DEVLINK_PARAM_TYPE_* constants
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Values []DevlinkParamValue
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}
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// DevlinkParamValue contains values of the parameter
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// Data field contains specific type which can be casted by unsing info from the DevlinkParam.Type field
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type DevlinkParamValue struct {
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rawData []byte
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Data interface{}
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CMODE uint8 // possible values are in nl.DEVLINK_PARAM_CMODE_* constants
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}
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// parseAttributes parses provided Netlink Attributes and populates DevlinkParam, returns error if occured
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func (dlp *DevlinkParam) parseAttributes(attrs []syscall.NetlinkRouteAttr) error {
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var valuesList [][]syscall.NetlinkRouteAttr
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for _, attr := range attrs {
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switch attr.Attr.Type {
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case nl.DEVLINK_ATTR_PARAM:
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nattrs, err := nl.ParseRouteAttr(attr.Value)
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if err != nil {
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return err
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}
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for _, nattr := range nattrs {
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switch nattr.Attr.Type {
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case nl.DEVLINK_ATTR_PARAM_NAME:
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dlp.Name = nl.BytesToString(nattr.Value)
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case nl.DEVLINK_ATTR_PARAM_GENERIC:
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dlp.IsGeneric = true
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case nl.DEVLINK_ATTR_PARAM_TYPE:
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if len(nattr.Value) == 1 {
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dlp.Type = nattr.Value[0]
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}
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case nl.DEVLINK_ATTR_PARAM_VALUES_LIST:
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nnattrs, err := nl.ParseRouteAttr(nattr.Value)
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if err != nil {
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return err
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}
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valuesList = append(valuesList, nnattrs)
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}
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}
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}
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}
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for _, valAttr := range valuesList {
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v := DevlinkParamValue{}
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if err := v.parseAttributes(valAttr, dlp.Type); err != nil {
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return err
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}
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dlp.Values = append(dlp.Values, v)
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}
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return nil
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}
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func (dlpv *DevlinkParamValue) parseAttributes(attrs []syscall.NetlinkRouteAttr, paramType uint8) error {
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for _, attr := range attrs {
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nattrs, err := nl.ParseRouteAttr(attr.Value)
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if err != nil {
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return err
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}
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var rawData []byte
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for _, nattr := range nattrs {
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switch nattr.Attr.Type {
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case nl.DEVLINK_ATTR_PARAM_VALUE_DATA:
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rawData = nattr.Value
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case nl.DEVLINK_ATTR_PARAM_VALUE_CMODE:
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if len(nattr.Value) == 1 {
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dlpv.CMODE = nattr.Value[0]
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}
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}
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}
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switch paramType {
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case nl.DEVLINK_PARAM_TYPE_U8:
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dlpv.Data = uint8(0)
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if rawData != nil && len(rawData) == 1 {
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dlpv.Data = uint8(rawData[0])
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}
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case nl.DEVLINK_PARAM_TYPE_U16:
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dlpv.Data = uint16(0)
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if rawData != nil {
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dlpv.Data = native.Uint16(rawData)
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}
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case nl.DEVLINK_PARAM_TYPE_U32:
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dlpv.Data = uint32(0)
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if rawData != nil {
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dlpv.Data = native.Uint32(rawData)
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}
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case nl.DEVLINK_PARAM_TYPE_STRING:
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dlpv.Data = ""
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if rawData != nil {
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dlpv.Data = nl.BytesToString(rawData)
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}
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case nl.DEVLINK_PARAM_TYPE_BOOL:
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dlpv.Data = rawData != nil
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}
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}
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return nil
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}
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func parseDevLinkDeviceList(msgs [][]byte) ([]*DevlinkDevice, error) {
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devices := make([]*DevlinkDevice, 0, len(msgs))
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for _, m := range msgs {
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@@ -635,6 +736,144 @@ func (h *Handle) DevlinkGetDeviceResources(bus string, device string) (*DevlinkR
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return &resources, nil
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}
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// DevlinkGetDeviceParams returns parameters for devlink device
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// Equivalent to: `devlink dev param show <bus>/<device>`
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func (h *Handle) DevlinkGetDeviceParams(bus string, device string) ([]*DevlinkParam, error) {
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_, req, err := h.createCmdReq(nl.DEVLINK_CMD_PARAM_GET, bus, device)
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if err != nil {
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return nil, err
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}
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req.Flags |= unix.NLM_F_DUMP
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respmsg, err := req.Execute(unix.NETLINK_GENERIC, 0)
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if err != nil {
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return nil, err
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}
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var params []*DevlinkParam
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for _, m := range respmsg {
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attrs, err := nl.ParseRouteAttr(m[nl.SizeofGenlmsg:])
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if err != nil {
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return nil, err
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}
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p := &DevlinkParam{}
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if err := p.parseAttributes(attrs); err != nil {
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return nil, err
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}
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params = append(params, p)
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}
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return params, nil
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}
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// DevlinkGetDeviceParams returns parameters for devlink device
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// Equivalent to: `devlink dev param show <bus>/<device>`
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func DevlinkGetDeviceParams(bus string, device string) ([]*DevlinkParam, error) {
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return pkgHandle.DevlinkGetDeviceParams(bus, device)
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}
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// DevlinkGetDeviceParamByName returns specific parameter for devlink device
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// Equivalent to: `devlink dev param show <bus>/<device> name <param>`
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func (h *Handle) DevlinkGetDeviceParamByName(bus string, device string, param string) (*DevlinkParam, error) {
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_, req, err := h.createCmdReq(nl.DEVLINK_CMD_PARAM_GET, bus, device)
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if err != nil {
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return nil, err
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}
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req.AddData(nl.NewRtAttr(nl.DEVLINK_ATTR_PARAM_NAME, nl.ZeroTerminated(param)))
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respmsg, err := req.Execute(unix.NETLINK_GENERIC, 0)
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if err != nil {
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return nil, err
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}
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if len(respmsg) == 0 {
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return nil, fmt.Errorf("unexpected response")
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}
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attrs, err := nl.ParseRouteAttr(respmsg[0][nl.SizeofGenlmsg:])
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if err != nil {
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return nil, err
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}
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p := &DevlinkParam{}
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if err := p.parseAttributes(attrs); err != nil {
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return nil, err
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}
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return p, nil
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}
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// DevlinkGetDeviceParamByName returns specific parameter for devlink device
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// Equivalent to: `devlink dev param show <bus>/<device> name <param>`
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func DevlinkGetDeviceParamByName(bus string, device string, param string) (*DevlinkParam, error) {
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return pkgHandle.DevlinkGetDeviceParamByName(bus, device, param)
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}
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// DevlinkSetDeviceParam set specific parameter for devlink device
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// Equivalent to: `devlink dev param set <bus>/<device> name <param> cmode <cmode> value <value>`
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// cmode argument should contain valid cmode value as uint8, modes are define in nl.DEVLINK_PARAM_CMODE_* constants
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// value argument should have one of the following types: uint8, uint16, uint32, string, bool
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func (h *Handle) DevlinkSetDeviceParam(bus string, device string, param string, cmode uint8, value interface{}) error {
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// retrive the param type
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p, err := h.DevlinkGetDeviceParamByName(bus, device, param)
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if err != nil {
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return fmt.Errorf("failed to get device param: %v", err)
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}
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paramType := p.Type
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_, req, err := h.createCmdReq(nl.DEVLINK_CMD_PARAM_SET, bus, device)
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if err != nil {
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return err
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}
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req.AddData(nl.NewRtAttr(nl.DEVLINK_ATTR_PARAM_TYPE, nl.Uint8Attr(paramType)))
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req.AddData(nl.NewRtAttr(nl.DEVLINK_ATTR_PARAM_NAME, nl.ZeroTerminated(param)))
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req.AddData(nl.NewRtAttr(nl.DEVLINK_ATTR_PARAM_VALUE_CMODE, nl.Uint8Attr(cmode)))
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var valueAsBytes []byte
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switch paramType {
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case nl.DEVLINK_PARAM_TYPE_U8:
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v, ok := value.(uint8)
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if !ok {
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return fmt.Errorf("unepected value type required: uint8, actual: %T", value)
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}
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valueAsBytes = nl.Uint8Attr(v)
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case nl.DEVLINK_PARAM_TYPE_U16:
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v, ok := value.(uint16)
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if !ok {
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return fmt.Errorf("unepected value type required: uint16, actual: %T", value)
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}
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valueAsBytes = nl.Uint16Attr(v)
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case nl.DEVLINK_PARAM_TYPE_U32:
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v, ok := value.(uint32)
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if !ok {
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return fmt.Errorf("unepected value type required: uint32, actual: %T", value)
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}
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valueAsBytes = nl.Uint32Attr(v)
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case nl.DEVLINK_PARAM_TYPE_STRING:
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v, ok := value.(string)
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if !ok {
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return fmt.Errorf("unepected value type required: string, actual: %T", value)
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}
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valueAsBytes = nl.ZeroTerminated(v)
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case nl.DEVLINK_PARAM_TYPE_BOOL:
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v, ok := value.(bool)
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if !ok {
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return fmt.Errorf("unepected value type required: bool, actual: %T", value)
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}
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if v {
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valueAsBytes = []byte{}
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}
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default:
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return fmt.Errorf("unsupported parameter type: %d", paramType)
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}
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if valueAsBytes != nil {
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req.AddData(nl.NewRtAttr(nl.DEVLINK_ATTR_PARAM_VALUE_DATA, valueAsBytes))
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}
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_, err = req.Execute(unix.NETLINK_GENERIC, 0)
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return err
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}
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// DevlinkSetDeviceParam set specific parameter for devlink device
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// Equivalent to: `devlink dev param set <bus>/<device> name <param> cmode <cmode> value <value>`
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// cmode argument should contain valid cmode value as uint8, modes are define in nl.DEVLINK_PARAM_CMODE_* constants
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// value argument should have one of the following types: uint8, uint16, uint32, string, bool
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func DevlinkSetDeviceParam(bus string, device string, param string, cmode uint8, value interface{}) error {
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return pkgHandle.DevlinkSetDeviceParam(bus, device, param, cmode, value)
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}
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// DevLinkGetPortByIndex provides a pointer to devlink portand nil error,
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// otherwise returns an error code.
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func DevLinkGetPortByIndex(Bus string, Device string, PortIndex uint32) (*DevlinkPort, error) {
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