Update golang.org/x/net commit hash to 749bd19

go.mod

@@ -18,7 +18,7 @@ require (
 	github.com/sethvargo/go-password v0.2.0
 	github.com/tv42/zbase32 v0.0.0-20220222190657-f76a9fc892fa
 	golang.org/x/crypto v0.0.0-20211202192323-5770296d904e
-	golang.org/x/net v0.0.0-20211112202133-69e39bad7dc2
+	golang.org/x/net v0.0.0-20220403103023-749bd193bc2b
 	golang.org/x/sync v0.0.0-20210220032951-036812b2e83c
 	gopkg.in/yaml.v2 v2.4.0
 )

go.sum

@@ -756,6 +756,8 @@ golang.org/x/net v0.0.0-20210226172049-e18ecbb05110 h1:qWPm9rbaAMKs8Bq/9LRpbMqxW
 golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
 golang.org/x/net v0.0.0-20211112202133-69e39bad7dc2 h1:CIJ76btIcR3eFI5EgSo6k1qKw9KJexJuRLI9G7Hp5wE=
 golang.org/x/net v0.0.0-20211112202133-69e39bad7dc2/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
+golang.org/x/net v0.0.0-20220403103023-749bd193bc2b h1:vI32FkLJNAWtGD4BwkThwEy6XS7ZLLMHkSkYfF8M0W0=
+golang.org/x/net v0.0.0-20220403103023-749bd193bc2b/go.mod h1:CfG3xpIq0wQ8r1q4Su4UZFWDARRcnwPjda9FqA0JpMk=
 golang.org/x/oauth2 v0.0.0-20180227000427-d7d64896b5ff/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/oauth2 v0.0.0-20181106182150-f42d05182288/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
@@ -837,8 +839,11 @@ golang.org/x/sys v0.0.0-20210603081109-ebe580a85c40 h1:JWgyZ1qgdTaF3N3oxC+MdTV7q
 golang.org/x/sys v0.0.0-20210603081109-ebe580a85c40/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1 h1:SrN+KX8Art/Sf4HNj6Zcz06G7VEz+7w9tdXTPOZ7+l4=
 golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20211216021012-1d35b9e2eb4e h1:fLOSk5Q00efkSvAm+4xcoXD+RRmLmmulPn5I3Y9F2EM=
+golang.org/x/sys v0.0.0-20211216021012-1d35b9e2eb4e/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/term v0.0.0-20201117132131-f5c789dd3221/go.mod h1:Nr5EML6q2oocZ2LXRh80K7BxOlk5/8JxuGnuhpl+muw=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
+golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
 golang.org/x/text v0.0.0-20170915032832-14c0d48ead0c/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.1-0.20180807135948-17ff2d5776d2/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
@@ -847,6 +852,8 @@ golang.org/x/text v0.3.3 h1:cokOdA+Jmi5PJGXLlLllQSgYigAEfHXJAERHVMaCc2k=
 golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/text v0.3.6 h1:aRYxNxv6iGQlyVaZmk6ZgYEDa+Jg18DxebPSrd6bg1M=
 golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
+golang.org/x/text v0.3.7 h1:olpwvP2KacW1ZWvsR7uQhoyTYvKAupfQrRGBFM352Gk=
+golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
 golang.org/x/time v0.0.0-20180412165947-fbb02b2291d2/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
 golang.org/x/time v0.0.0-20181108054448-85acf8d2951c/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
 golang.org/x/time v0.0.0-20190308202827-9d24e82272b4/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=

vendor/golang.org/x/sys/cpu/cpu.go

@@ -56,6 +56,7 @@ var X86 struct {
 	HasAVX512BF16       bool // Advanced vector extension 512 BFloat16 Instructions
 	HasBMI1             bool // Bit manipulation instruction set 1
 	HasBMI2             bool // Bit manipulation instruction set 2
+	HasCX16             bool // Compare and exchange 16 Bytes
 	HasERMS             bool // Enhanced REP for MOVSB and STOSB
 	HasFMA              bool // Fused-multiply-add instructions
 	HasOSXSAVE          bool // OS supports XSAVE/XRESTOR for saving/restoring XMM registers.

vendor/golang.org/x/sys/cpu/cpu_gc_x86.go

@@ -15,7 +15,3 @@ func cpuid(eaxArg, ecxArg uint32) (eax, ebx, ecx, edx uint32)
 // xgetbv with ecx = 0 is implemented in cpu_x86.s for gc compiler
 // and in cpu_gccgo.c for gccgo.
 func xgetbv() (eax, edx uint32)
-
-// darwinSupportsAVX512 is implemented in cpu_x86.s for gc compiler
-// and in cpu_gccgo_x86.go for gccgo.
-func darwinSupportsAVX512() bool

vendor/golang.org/x/sys/cpu/cpu_x86.go

@@ -39,6 +39,7 @@ func initOptions() {
 		{Name: "avx512bf16", Feature: &X86.HasAVX512BF16},
 		{Name: "bmi1", Feature: &X86.HasBMI1},
 		{Name: "bmi2", Feature: &X86.HasBMI2},
+		{Name: "cx16", Feature: &X86.HasCX16},
 		{Name: "erms", Feature: &X86.HasERMS},
 		{Name: "fma", Feature: &X86.HasFMA},
 		{Name: "osxsave", Feature: &X86.HasOSXSAVE},
@@ -73,6 +74,7 @@ func archInit() {
 	X86.HasPCLMULQDQ = isSet(1, ecx1)
 	X86.HasSSSE3 = isSet(9, ecx1)
 	X86.HasFMA = isSet(12, ecx1)
+	X86.HasCX16 = isSet(13, ecx1)
 	X86.HasSSE41 = isSet(19, ecx1)
 	X86.HasSSE42 = isSet(20, ecx1)
 	X86.HasPOPCNT = isSet(23, ecx1)
@@ -88,9 +90,10 @@ func archInit() {
 		osSupportsAVX = isSet(1, eax) && isSet(2, eax)
 
 		if runtime.GOOS == "darwin" {
-			// Check darwin commpage for AVX512 support. Necessary because:
-			// https://github.com/apple/darwin-xnu/blob/0a798f6738bc1db01281fc08ae024145e84df927/osfmk/i386/fpu.c#L175-L201
-			osSupportsAVX512 = osSupportsAVX && darwinSupportsAVX512()
+			// Darwin doesn't save/restore AVX-512 mask registers correctly across signal handlers.
+			// Since users can't rely on mask register contents, let's not advertise AVX-512 support.
+			// See issue 49233.
+			osSupportsAVX512 = false
 		} else {
 			// Check if OPMASK and ZMM registers have OS support.
 			osSupportsAVX512 = osSupportsAVX && isSet(5, eax) && isSet(6, eax) && isSet(7, eax)

vendor/golang.org/x/sys/cpu/cpu_x86.s

@@ -26,27 +26,3 @@ TEXT ·xgetbv(SB),NOSPLIT,$0-8
 	MOVL AX, eax+0(FP)
 	MOVL DX, edx+4(FP)
 	RET
-
-// func darwinSupportsAVX512() bool
-TEXT ·darwinSupportsAVX512(SB), NOSPLIT, $0-1
-    MOVB    $0, ret+0(FP) // default to false
-#ifdef GOOS_darwin   // return if not darwin
-#ifdef GOARCH_amd64  // return if not amd64
-// These values from:
-// https://github.com/apple/darwin-xnu/blob/xnu-4570.1.46/osfmk/i386/cpu_capabilities.h
-#define commpage64_base_address         0x00007fffffe00000
-#define commpage64_cpu_capabilities64   (commpage64_base_address+0x010)
-#define commpage64_version              (commpage64_base_address+0x01E)
-#define hasAVX512F                      0x0000004000000000
-    MOVQ    $commpage64_version, BX
-    CMPW    (BX), $13  // cpu_capabilities64 undefined in versions < 13
-    JL      no_avx512
-    MOVQ    $commpage64_cpu_capabilities64, BX
-    MOVQ    $hasAVX512F, CX
-    TESTQ   (BX), CX
-    JZ      no_avx512
-    MOVB    $1, ret+0(FP)
-no_avx512:
-#endif
-#endif
-    RET

vendor/golang.org/x/sys/unix/README.md

@@ -149,7 +149,7 @@ To add a constant, add the header that includes it to the appropriate variable.
 Then, edit the regex (if necessary) to match the desired constant. Avoid making
 the regex too broad to avoid matching unintended constants.
 
-### mkmerge.go
+### internal/mkmerge
 
 This program is used to extract duplicate const, func, and type declarations
 from the generated architecture-specific files listed below, and merge these

vendor/golang.org/x/sys/unix/ifreq_linux.go

+// Copyright 2021 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+//go:build linux
+// +build linux
+
+package unix
+
+import (
+	"bytes"
+	"unsafe"
+)
+
+// Helpers for dealing with ifreq since it contains a union and thus requires a
+// lot of unsafe.Pointer casts to use properly.
+
+// An Ifreq is a type-safe wrapper around the raw ifreq struct. An Ifreq
+// contains an interface name and a union of arbitrary data which can be
+// accessed using the Ifreq's methods. To create an Ifreq, use the NewIfreq
+// function.
+//
+// Use the Name method to access the stored interface name. The union data
+// fields can be get and set using the following methods:
+//   - Uint16/SetUint16: flags
+//   - Uint32/SetUint32: ifindex, metric, mtu
+type Ifreq struct{ raw ifreq }
+
+// NewIfreq creates an Ifreq with the input network interface name after
+// validating the name does not exceed IFNAMSIZ-1 (trailing NULL required)
+// bytes.
+func NewIfreq(name string) (*Ifreq, error) {
+	// Leave room for terminating NULL byte.
+	if len(name) >= IFNAMSIZ {
+		return nil, EINVAL
+	}
+
+	var ifr ifreq
+	copy(ifr.Ifrn[:], name)
+
+	return &Ifreq{raw: ifr}, nil
+}
+
+// TODO(mdlayher): get/set methods for hardware address sockaddr, char array, etc.
+
+// Name returns the interface name associated with the Ifreq.
+func (ifr *Ifreq) Name() string {
+	// BytePtrToString requires a NULL terminator or the program may crash. If
+	// one is not present, just return the empty string.
+	if !bytes.Contains(ifr.raw.Ifrn[:], []byte{0x00}) {
+		return ""
+	}
+
+	return BytePtrToString(&ifr.raw.Ifrn[0])
+}
+
+// According to netdevice(7), only AF_INET addresses are returned for numerous
+// sockaddr ioctls. For convenience, we expose these as Inet4Addr since the Port
+// field and other data is always empty.
+
+// Inet4Addr returns the Ifreq union data from an embedded sockaddr as a C
+// in_addr/Go []byte (4-byte IPv4 address) value. If the sockaddr family is not
+// AF_INET, an error is returned.
+func (ifr *Ifreq) Inet4Addr() ([]byte, error) {
+	raw := *(*RawSockaddrInet4)(unsafe.Pointer(&ifr.raw.Ifru[:SizeofSockaddrInet4][0]))
+	if raw.Family != AF_INET {
+		// Cannot safely interpret raw.Addr bytes as an IPv4 address.
+		return nil, EINVAL
+	}
+
+	return raw.Addr[:], nil
+}
+
+// SetInet4Addr sets a C in_addr/Go []byte (4-byte IPv4 address) value in an
+// embedded sockaddr within the Ifreq's union data. v must be 4 bytes in length
+// or an error will be returned.
+func (ifr *Ifreq) SetInet4Addr(v []byte) error {
+	if len(v) != 4 {
+		return EINVAL
+	}
+
+	var addr [4]byte
+	copy(addr[:], v)
+
+	ifr.clear()
+	*(*RawSockaddrInet4)(
+		unsafe.Pointer(&ifr.raw.Ifru[:SizeofSockaddrInet4][0]),
+	) = RawSockaddrInet4{
+		// Always set IP family as ioctls would require it anyway.
+		Family: AF_INET,
+		Addr:   addr,
+	}
+
+	return nil
+}
+
+// Uint16 returns the Ifreq union data as a C short/Go uint16 value.
+func (ifr *Ifreq) Uint16() uint16 {
+	return *(*uint16)(unsafe.Pointer(&ifr.raw.Ifru[:2][0]))
+}
+
+// SetUint16 sets a C short/Go uint16 value as the Ifreq's union data.
+func (ifr *Ifreq) SetUint16(v uint16) {
+	ifr.clear()
+	*(*uint16)(unsafe.Pointer(&ifr.raw.Ifru[:2][0])) = v
+}
+
+// Uint32 returns the Ifreq union data as a C int/Go uint32 value.
+func (ifr *Ifreq) Uint32() uint32 {
+	return *(*uint32)(unsafe.Pointer(&ifr.raw.Ifru[:4][0]))
+}
+
+// SetUint32 sets a C int/Go uint32 value as the Ifreq's union data.
+func (ifr *Ifreq) SetUint32(v uint32) {
+	ifr.clear()
+	*(*uint32)(unsafe.Pointer(&ifr.raw.Ifru[:4][0])) = v
+}
+
+// clear zeroes the ifreq's union field to prevent trailing garbage data from
+// being sent to the kernel if an ifreq is reused.
+func (ifr *Ifreq) clear() {
+	for i := range ifr.raw.Ifru {
+		ifr.raw.Ifru[i] = 0
+	}
+}
+
+// TODO(mdlayher): export as IfreqData? For now we can provide helpers such as
+// IoctlGetEthtoolDrvinfo which use these APIs under the hood.
+
+// An ifreqData is an Ifreq which carries pointer data. To produce an ifreqData,
+// use the Ifreq.withData method.
+type ifreqData struct {
+	name [IFNAMSIZ]byte
+	// A type separate from ifreq is required in order to comply with the
+	// unsafe.Pointer rules since the "pointer-ness" of data would not be
+	// preserved if it were cast into the byte array of a raw ifreq.
+	data unsafe.Pointer
+	// Pad to the same size as ifreq.
+	_ [len(ifreq{}.Ifru) - SizeofPtr]byte
+}
+
+// withData produces an ifreqData with the pointer p set for ioctls which require
+// arbitrary pointer data.
+func (ifr Ifreq) withData(p unsafe.Pointer) ifreqData {
+	return ifreqData{
+		name: ifr.raw.Ifrn,
+		data: p,
+	}
+}

vendor/golang.org/x/sys/unix/ioctl_linux.go

@@ -5,7 +5,6 @@
 package unix
 
 import (
-	"runtime"
 	"unsafe"
 )
 
@@ -22,56 +21,42 @@ func IoctlRetInt(fd int, req uint) (int, error) {
 
 func IoctlGetUint32(fd int, req uint) (uint32, error) {
 	var value uint32
-	err := ioctl(fd, req, uintptr(unsafe.Pointer(&value)))
+	err := ioctlPtr(fd, req, unsafe.Pointer(&value))
 	return value, err
 }
 
 func IoctlGetRTCTime(fd int) (*RTCTime, error) {
 	var value RTCTime
-	err := ioctl(fd, RTC_RD_TIME, uintptr(unsafe.Pointer(&value)))
+	err := ioctlPtr(fd, RTC_RD_TIME, unsafe.Pointer(&value))
 	return &value, err
 }
 
 func IoctlSetRTCTime(fd int, value *RTCTime) error {
-	err := ioctl(fd, RTC_SET_TIME, uintptr(unsafe.Pointer(value)))
-	runtime.KeepAlive(value)
-	return err
+	return ioctlPtr(fd, RTC_SET_TIME, unsafe.Pointer(value))
 }
 
 func IoctlGetRTCWkAlrm(fd int) (*RTCWkAlrm, error) {
 	var value RTCWkAlrm
-	err := ioctl(fd, RTC_WKALM_RD, uintptr(unsafe.Pointer(&value)))
+	err := ioctlPtr(fd, RTC_WKALM_RD, unsafe.Pointer(&value))
 	return &value, err
 }
 
 func IoctlSetRTCWkAlrm(fd int, value *RTCWkAlrm) error {
-	err := ioctl(fd, RTC_WKALM_SET, uintptr(unsafe.Pointer(value)))
-	runtime.KeepAlive(value)
-	return err
-}
-
-type ifreqEthtool struct {
-	name [IFNAMSIZ]byte
-	data unsafe.Pointer
+	return ioctlPtr(fd, RTC_WKALM_SET, unsafe.Pointer(value))
 }
 
 // IoctlGetEthtoolDrvinfo fetches ethtool driver information for the network
 // device specified by ifname.
 func IoctlGetEthtoolDrvinfo(fd int, ifname string) (*EthtoolDrvinfo, error) {
-	// Leave room for terminating NULL byte.
-	if len(ifname) >= IFNAMSIZ {
-		return nil, EINVAL
+	ifr, err := NewIfreq(ifname)
+	if err != nil {
+		return nil, err
 	}
 
-	value := EthtoolDrvinfo{
-		Cmd: ETHTOOL_GDRVINFO,
-	}
-	ifreq := ifreqEthtool{
-		data: unsafe.Pointer(&value),
-	}
-	copy(ifreq.name[:], ifname)
-	err := ioctl(fd, SIOCETHTOOL, uintptr(unsafe.Pointer(&ifreq)))
-	runtime.KeepAlive(ifreq)
+	value := EthtoolDrvinfo{Cmd: ETHTOOL_GDRVINFO}
+	ifrd := ifr.withData(unsafe.Pointer(&value))
+
+	err = ioctlIfreqData(fd, SIOCETHTOOL, &ifrd)
 	return &value, err
 }
 
@@ -80,7 +65,7 @@ func IoctlGetEthtoolDrvinfo(fd int, ifname string) (*EthtoolDrvinfo, error) {
 // https://www.kernel.org/doc/html/latest/watchdog/watchdog-api.html.
 func IoctlGetWatchdogInfo(fd int) (*WatchdogInfo, error) {
 	var value WatchdogInfo
-	err := ioctl(fd, WDIOC_GETSUPPORT, uintptr(unsafe.Pointer(&value)))
+	err := ioctlPtr(fd, WDIOC_GETSUPPORT, unsafe.Pointer(&value))
 	return &value, err
 }
 
@@ -88,6 +73,7 @@ func IoctlGetWatchdogInfo(fd int) (*WatchdogInfo, error) {
 // more information, see:
 // https://www.kernel.org/doc/html/latest/watchdog/watchdog-api.html.
 func IoctlWatchdogKeepalive(fd int) error {
+	// arg is ignored and not a pointer, so ioctl is fine instead of ioctlPtr.
 	return ioctl(fd, WDIOC_KEEPALIVE, 0)
 }
 
@@ -95,9 +81,7 @@ func IoctlWatchdogKeepalive(fd int) error {
 // range of data conveyed in value to the file associated with the file
 // descriptor destFd. See the ioctl_ficlonerange(2) man page for details.
 func IoctlFileCloneRange(destFd int, value *FileCloneRange) error {
-	err := ioctl(destFd, FICLONERANGE, uintptr(unsafe.Pointer(value)))
-	runtime.KeepAlive(value)
-	return err
+	return ioctlPtr(destFd, FICLONERANGE, unsafe.Pointer(value))
 }
 
 // IoctlFileClone performs an FICLONE ioctl operation to clone the entire file
@@ -148,7 +132,7 @@ func IoctlFileDedupeRange(srcFd int, value *FileDedupeRange) error {
 		rawinfo.Reserved = value.Info[i].Reserved
 	}
 
-	err := ioctl(srcFd, FIDEDUPERANGE, uintptr(unsafe.Pointer(&buf[0])))
+	err := ioctlPtr(srcFd, FIDEDUPERANGE, unsafe.Pointer(&buf[0]))
 
 	// Output
 	for i := range value.Info {
@@ -166,31 +150,47 @@ func IoctlFileDedupeRange(srcFd int, value *FileDedupeRange) error {
 }
 
 func IoctlHIDGetDesc(fd int, value *HIDRawReportDescriptor) error {
-	err := ioctl(fd, HIDIOCGRDESC, uintptr(unsafe.Pointer(value)))
-	runtime.KeepAlive(value)
-	return err
+	return ioctlPtr(fd, HIDIOCGRDESC, unsafe.Pointer(value))
 }
 
 func IoctlHIDGetRawInfo(fd int) (*HIDRawDevInfo, error) {
 	var value HIDRawDevInfo
-	err := ioctl(fd, HIDIOCGRAWINFO, uintptr(unsafe.Pointer(&value)))
+	err := ioctlPtr(fd, HIDIOCGRAWINFO, unsafe.Pointer(&value))
 	return &value, err
 }
 
 func IoctlHIDGetRawName(fd int) (string, error) {
 	var value [_HIDIOCGRAWNAME_LEN]byte
-	err := ioctl(fd, _HIDIOCGRAWNAME, uintptr(unsafe.Pointer(&value[0])))
+	err := ioctlPtr(fd, _HIDIOCGRAWNAME, unsafe.Pointer(&value[0]))
 	return ByteSliceToString(value[:]), err
 }
 
 func IoctlHIDGetRawPhys(fd int) (string, error) {
 	var value [_HIDIOCGRAWPHYS_LEN]byte
-	err := ioctl(fd, _HIDIOCGRAWPHYS, uintptr(unsafe.Pointer(&value[0])))
+	err := ioctlPtr(fd, _HIDIOCGRAWPHYS, unsafe.Pointer(&value[0]))
 	return ByteSliceToString(value[:]), err
 }
 
 func IoctlHIDGetRawUniq(fd int) (string, error) {
 	var value [_HIDIOCGRAWUNIQ_LEN]byte
-	err := ioctl(fd, _HIDIOCGRAWUNIQ, uintptr(unsafe.Pointer(&value[0])))
+	err := ioctlPtr(fd, _HIDIOCGRAWUNIQ, unsafe.Pointer(&value[0]))
 	return ByteSliceToString(value[:]), err
 }
+
+// IoctlIfreq performs an ioctl using an Ifreq structure for input and/or
+// output. See the netdevice(7) man page for details.
+func IoctlIfreq(fd int, req uint, value *Ifreq) error {
+	// It is possible we will add more fields to *Ifreq itself later to prevent
+	// misuse, so pass the raw *ifreq directly.
+	return ioctlPtr(fd, req, unsafe.Pointer(&value.raw))
+}
+
+// TODO(mdlayher): export if and when IfreqData is exported.
+
+// ioctlIfreqData performs an ioctl using an ifreqData structure for input
+// and/or output. See the netdevice(7) man page for details.
+func ioctlIfreqData(fd int, req uint, value *ifreqData) error {
+	// The memory layout of IfreqData (type-safe) and ifreq (not type-safe) are
+	// identical so pass *IfreqData directly.
+	return ioctlPtr(fd, req, unsafe.Pointer(value))
+}

vendor/golang.org/x/sys/unix/mkall.sh

@@ -50,7 +50,7 @@ if [[ "$GOOS" = "linux" ]]; then
 	# Use the Docker-based build system
 	# Files generated through docker (use $cmd so you can Ctl-C the build or run)
 	$cmd docker build --tag generate:$GOOS $GOOS
-	$cmd docker run --interactive --tty --volume $(cd -- "$(dirname -- "$0")" && /bin/pwd):/build generate:$GOOS
+	$cmd docker run --interactive --tty --volume $(cd -- "$(dirname -- "$0")/.." && /bin/pwd):/build generate:$GOOS
 	exit
 fi
 

vendor/golang.org/x/sys/unix/mkerrors.sh

@@ -54,7 +54,7 @@ includes_AIX='
 
 includes_Darwin='
 #define _DARWIN_C_SOURCE
-#define KERNEL
+#define KERNEL 1
 #define _DARWIN_USE_64_BIT_INODE
 #define __APPLE_USE_RFC_3542
 #include <stdint.h>
@@ -75,6 +75,7 @@ includes_Darwin='
 #include <sys/utsname.h>
 #include <sys/wait.h>
 #include <sys/xattr.h>