mirror of
https://github.com/siderolabs/talos.git
synced 2026-05-06 04:46:17 +02:00
f35b213b2b
The fix is based on the https://github.com/kubevirt/kubevirt/pull/1766, and for the background see https://github.com/gregoryolsen/lxc-devuan/issues/1. Note this is not an issue in Talos itself, but only for QEMU VMs created with `talosctl cluster create`. Signed-off-by: Andrey Smirnov <andrey.smirnov@siderolabs.com>
77 lines
1.7 KiB
Go
77 lines
1.7 KiB
Go
// This Source Code Form is subject to the terms of the Mozilla Public
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// License, v. 2.0. If a copy of the MPL was not distributed with this
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// file, You can obtain one at http://mozilla.org/MPL/2.0/.
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//go:build linux
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package ethtool
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// Origin: https://github.com/weaveworks/weave/blob/master/net/ethtool.go
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import (
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"fmt"
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"syscall"
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"unsafe"
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)
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// Linux constants.
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//
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//nolint:revive
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const (
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SIOCETHTOOL = 0x8946 // linux/sockios.h
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ETHTOOL_GTXCSUM = 0x00000016 // linux/ethtool.h
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ETHTOOL_STXCSUM = 0x00000017 // linux/ethtool.h
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IFNAMSIZ = 16 // linux/if.h
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)
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// linux/if.h 'struct ifreq'.
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type ifReqData struct {
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Name [IFNAMSIZ]byte
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Data uintptr
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}
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// linux/ethtool.h 'struct ethtool_value'.
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type ethtoolValue struct {
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Cmd uint32
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Data uint32
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}
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func ioctlEthtool(fd int, argp uintptr) error {
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_, _, errno := syscall.RawSyscall(syscall.SYS_IOCTL, uintptr(fd), uintptr(SIOCETHTOOL), argp)
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if errno != 0 {
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return errno
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}
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return nil
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}
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// TXOff disables TX checksum offload on specified interface.
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func TXOff(name string) error {
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if len(name)+1 > IFNAMSIZ {
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return fmt.Errorf("name too long")
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}
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socket, err := syscall.Socket(syscall.AF_INET, syscall.SOCK_DGRAM, 0)
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if err != nil {
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return err
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}
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defer syscall.Close(socket) //nolint:errcheck
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// Request current value
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value := ethtoolValue{Cmd: ETHTOOL_GTXCSUM}
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request := ifReqData{Data: uintptr(unsafe.Pointer(&value))}
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copy(request.Name[:], name)
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if err := ioctlEthtool(socket, uintptr(unsafe.Pointer(&request))); err != nil {
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return err
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}
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if value.Data == 0 { // if already off, don't try to change
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return nil
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}
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value = ethtoolValue{ETHTOOL_STXCSUM, 0}
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return ioctlEthtool(socket, uintptr(unsafe.Pointer(&request)))
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}
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