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stringSets.go
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stringSets.go
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package ethtool
import (
"bytes"
"github.com/pkg/errors"
"unsafe"
)
const (
maxNumStrings = 256
maxStringLength = 32
// Get string set info
getStringSetInfoIoctl = 0x00000037
// Get specified string set
getStringSet = 0x0000001b
)
// StringSet a set of strings used by some ethtool ioctls
type StringSet uint32
const (
// StringSetTest Self-test result names
StringSetTest StringSet = 0
// StringSetStats Statistic names
StringSetStats StringSet = 1
// StringSetPrivFlag Driver private flag names
StringSetPrivFlag StringSet = 2
// StringSetTupleFilters Depracted
StringSetTupleFilters StringSet = 3
// StringSetFeatures Device feature names
StringSetFeatures StringSet = 4
// StringSetRssHashFuncs RSS hash function names
StringSetRssHashFuncs StringSet = 5
// StringSetTunables Not documented in the kernel's source code
StringSetTunables StringSet = 6
// StringSetPhyStats PHY Statistic names
StringSetPhyStats StringSet = 7
// StringSetPhyTunables PPHY tunables names
StringSetPhyTunables StringSet = 8
// StringSetLinkModes link mode names
StringSetLinkModes StringSet = 9
// StringSetMsgClasses debug message class names
StringSetMsgClasses StringSet = 10
// StringSetWolModes wake-on-lan modes
StringSetWolModes StringSet = 11
// StringSetSofTimestamping SOF_TIMESTAMPING_* flags
StringSetSofTimestamping StringSet = 12
// StringSetTimestampTxTypes timestamping Tx types
StringSetTimestampTxTypes StringSet = 13
// StringSetTimestampRxFilters timestamping Rx filters
StringSetTimestampRxFilters StringSet = 14
)
var existingStringSets = []StringSet{
StringSetTest, StringSetStats, StringSetPrivFlag, StringSetTupleFilters, StringSetTupleFilters, StringSetFeatures,
StringSetRssHashFuncs, StringSetTunables, StringSetPhyStats, StringSetPhyTunables, StringSetLinkModes,
StringSetMsgClasses, StringSetWolModes, StringSetSofTimestamping, StringSetTimestampTxTypes, StringSetTimestampRxFilters}
type ethtoolGStrings struct {
cmd uint32
stringSet uint32
length uint32
data [maxNumStrings * maxStringLength]byte
}
type ethtoolSsetInfo struct {
cmd uint32
reserved uint32
ssetMask uint64
data uint32
}
// GetStringSet retrieves the given StringSet and returns a string slice
func (i *Interface) GetStringSet(set StringSet) ([]string, error) {
length, err := i.GetStringSetLength(set)
if err != nil {
return nil, errors.Wrapf(err, "Error retrieving string set length: %v", err)
}
if length == 0 {
return []string{}, nil
}
gStrings := ethtoolGStrings{
cmd: getStringSet,
stringSet: uint32(set),
length: length,
data: [maxNumStrings * maxStringLength]byte{},
}
if err := i.performIoctl(uintptr(unsafe.Pointer(&gStrings))); err != nil {
return nil, errors.Wrapf(err, "Error performing ioctl getStringSet: %v", err)
}
ret := make([]string, int(gStrings.length))
for i := 0; i < int(gStrings.length); i++ {
b := gStrings.data[i*maxStringLength : (i+1)*maxStringLength]
ret[i] = string(bytes.Trim(b, "\x00"))
}
return ret, nil
}
// GetStringSetLength gets the length of a given StringSet
func (i *Interface) GetStringSetLength(set StringSet) (uint32, error) {
setInfo := ethtoolSsetInfo{
cmd: getStringSetInfoIoctl,
ssetMask: 1 << uint32(set),
}
if err := i.performIoctl(uintptr(unsafe.Pointer(&setInfo))); err != nil {
return 0, errors.Wrapf(err, "Error performing ioctl getStringSetInfoIoctl")
}
return uint32(setInfo.data), nil
}