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addes support to get and set device private flags #37

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addes support to get and set device private flags #37

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88 changes: 77 additions & 11 deletions ethtool.go
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Original file line number Diff line number Diff line change
Expand Up @@ -47,12 +47,13 @@ const (

// ethtool stats related constants.
const (
ETH_GSTRING_LEN = 32
ETH_SS_STATS = 1
ETH_SS_FEATURES = 4
ETHTOOL_GDRVINFO = 0x00000003
ETHTOOL_GSTRINGS = 0x0000001b
ETHTOOL_GSTATS = 0x0000001d
ETH_GSTRING_LEN = 32
ETH_SS_STATS = 1
ETH_SS_PRIV_FLAGS = 2
ETH_SS_FEATURES = 4
ETHTOOL_GDRVINFO = 0x00000003
ETHTOOL_GSTRINGS = 0x0000001b
ETHTOOL_GSTATS = 0x0000001d
// other CMDs from ethtool-copy.h of ethtool-3.5 package
ETHTOOL_GSET = 0x00000001 /* Get settings. */
ETHTOOL_SSET = 0x00000002 /* Set settings. */
Expand All @@ -71,6 +72,9 @@ const (
ETHTOOL_SFEATURES = 0x0000003b /* Change device offload settings */
ETHTOOL_GFLAGS = 0x00000025 /* Get flags bitmap(ethtool_value) */
ETHTOOL_GSSET_INFO = 0x00000037 /* Get string set info */

ETHTOOL_GPFLAGS = 0x00000027 /* Get driver-private flags bitmap */
ETHTOOL_SPFLAGS = 0x00000028 /* Set driver-private flags bitmap */
)

// MAX_GSTRINGS maximum number of stats entries that ethtool can
Expand Down Expand Up @@ -468,11 +472,11 @@ func setFeatureBit(blocks *[MAX_FEATURE_BLOCKS]ethtoolSetFeaturesBlock, index ui
}
}

// FeatureNames shows supported features by their name.
func (e *Ethtool) FeatureNames(intf string) (map[string]uint, error) {
func (e *Ethtool) getStringset(intf string, setID uint32) (map[string]uint, error) {

ssetInfo := ethtoolSsetInfo{
cmd: ETHTOOL_GSSET_INFO,
sset_mask: 1 << ETH_SS_FEATURES,
sset_mask: 1 << setID,
}

if err := e.ioctl(intf, uintptr(unsafe.Pointer(&ssetInfo))); err != nil {
Expand All @@ -488,7 +492,7 @@ func (e *Ethtool) FeatureNames(intf string) (map[string]uint, error) {

gstrings := ethtoolGStrings{
cmd: ETHTOOL_GSTRINGS,
string_set: ETH_SS_FEATURES,
string_set: setID,
len: length,
data: [MAX_GSTRINGS * ETH_GSTRING_LEN]byte{},
}
Expand All @@ -505,10 +509,14 @@ func (e *Ethtool) FeatureNames(intf string) (map[string]uint, error) {
result[key] = uint(i)
}
}

return result, nil
}

// FeatureNames shows supported features by their name.
func (e *Ethtool) FeatureNames(intf string) (map[string]uint, error) {
return e.getStringset(intf, ETH_SS_FEATURES)
}

// Features retrieves features of the given interface name.
func (e *Ethtool) Features(intf string) (map[string]bool, error) {
names, err := e.FeatureNames(intf)
Expand Down Expand Up @@ -563,6 +571,64 @@ func (e *Ethtool) Change(intf string, config map[string]bool) error {
return e.ioctl(intf, uintptr(unsafe.Pointer(&features)))
}

// PrivateFlagNames get driver private flag names (and offset).
func (e *Ethtool) PrivateFlagNames(intf string) (map[string]uint, error) {
return e.getStringset(intf, ETH_SS_PRIV_FLAGS)
}

// PrivateFlags get private flag settings.
func (e *Ethtool) PrivateFlags(intf string) (map[string]bool, error) {
names, err := e.PrivateFlagNames(intf)
if err != nil {
return nil, err
}

flags := ethtoolValue{
cmd: ETHTOOL_GPFLAGS,
}

if err := e.ioctl(intf, uintptr(unsafe.Pointer(&flags))); err != nil {
return nil, err
}

result := make(map[string]bool, len(names))
for k, v := range names {
result[k] = flags.data&(1<<v) != 0
}
return result, nil
}

// ChangePrivateFlags change specified private flags.
func (e *Ethtool) ChangePrivateFlags(intf string, changes map[string]bool) error {
names, err := e.PrivateFlagNames(intf)
if err != nil {
return err
}

flags := ethtoolValue{
cmd: ETHTOOL_GPFLAGS,
}

if err := e.ioctl(intf, uintptr(unsafe.Pointer(&flags))); err != nil {
return err
}

for k, v := range changes {
offset, ok := names[k]
if !ok {
return fmt.Errorf("Unknown private flag: %s", k)
}
if !v {
flags.data &= ^(1 << offset)
} else {
flags.data |= (1 << offset)
}
}

flags.cmd = ETHTOOL_SPFLAGS
return e.ioctl(intf, uintptr(unsafe.Pointer(&flags)))
}

// Get state of a link.
func (e *Ethtool) LinkState(intf string) (uint32, error) {
x := ethtoolLink{
Expand Down