unix: split linux ioctl wrappers into separate file
Split all ioctl wrappers on linux into ioctl_linux.go and reorder them
so related ioctls are grouped together.
Change-Id: Iaf80993001ba3b4d4fa3096fed522cd9d339d21c
Reviewed-on: https://go-review.googlesource.com/c/sys/+/311389
Trust: Tobias Klauser <tobias.klauser@gmail.com>
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
diff --git a/unix/ioctl_linux.go b/unix/ioctl_linux.go
new file mode 100644
index 0000000..48773f7
--- /dev/null
+++ b/unix/ioctl_linux.go
@@ -0,0 +1,196 @@
+// 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.
+
+package unix
+
+import (
+ "runtime"
+ "unsafe"
+)
+
+// IoctlRetInt performs an ioctl operation specified by req on a device
+// associated with opened file descriptor fd, and returns a non-negative
+// integer that is returned by the ioctl syscall.
+func IoctlRetInt(fd int, req uint) (int, error) {
+ ret, _, err := Syscall(SYS_IOCTL, uintptr(fd), uintptr(req), 0)
+ if err != 0 {
+ return 0, err
+ }
+ return int(ret), nil
+}
+
+func IoctlGetUint32(fd int, req uint) (uint32, error) {
+ var value uint32
+ err := ioctl(fd, req, uintptr(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)))
+ 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
+}
+
+func IoctlGetRTCWkAlrm(fd int) (*RTCWkAlrm, error) {
+ var value RTCWkAlrm
+ err := ioctl(fd, RTC_WKALM_RD, uintptr(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
+}
+
+// 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
+ }
+
+ 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)
+ return &value, err
+}
+
+// IoctlGetWatchdogInfo fetches information about a watchdog device from the
+// Linux watchdog API. For more information, see:
+// 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)))
+ return &value, err
+}
+
+// IoctlWatchdogKeepalive issues a keepalive ioctl to a watchdog device. For
+// more information, see:
+// https://www.kernel.org/doc/html/latest/watchdog/watchdog-api.html.
+func IoctlWatchdogKeepalive(fd int) error {
+ return ioctl(fd, WDIOC_KEEPALIVE, 0)
+}
+
+// IoctlFileCloneRange performs an FICLONERANGE ioctl operation to clone the
+// 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
+}
+
+// IoctlFileClone performs an FICLONE ioctl operation to clone the entire file
+// associated with the file description srcFd to the file associated with the
+// file descriptor destFd. See the ioctl_ficlone(2) man page for details.
+func IoctlFileClone(destFd, srcFd int) error {
+ return ioctl(destFd, FICLONE, uintptr(srcFd))
+}
+
+type FileDedupeRange struct {
+ Src_offset uint64
+ Src_length uint64
+ Reserved1 uint16
+ Reserved2 uint32
+ Info []FileDedupeRangeInfo
+}
+
+type FileDedupeRangeInfo struct {
+ Dest_fd int64
+ Dest_offset uint64
+ Bytes_deduped uint64
+ Status int32
+ Reserved uint32
+}
+
+// IoctlFileDedupeRange performs an FIDEDUPERANGE ioctl operation to share the
+// range of data conveyed in value from the file associated with the file
+// descriptor srcFd to the value.Info destinations. See the
+// ioctl_fideduperange(2) man page for details.
+func IoctlFileDedupeRange(srcFd int, value *FileDedupeRange) error {
+ buf := make([]byte, SizeofRawFileDedupeRange+
+ len(value.Info)*SizeofRawFileDedupeRangeInfo)
+ rawrange := (*RawFileDedupeRange)(unsafe.Pointer(&buf[0]))
+ rawrange.Src_offset = value.Src_offset
+ rawrange.Src_length = value.Src_length
+ rawrange.Dest_count = uint16(len(value.Info))
+ rawrange.Reserved1 = value.Reserved1
+ rawrange.Reserved2 = value.Reserved2
+
+ for i := range value.Info {
+ rawinfo := (*RawFileDedupeRangeInfo)(unsafe.Pointer(
+ uintptr(unsafe.Pointer(&buf[0])) + uintptr(SizeofRawFileDedupeRange) +
+ uintptr(i*SizeofRawFileDedupeRangeInfo)))
+ rawinfo.Dest_fd = value.Info[i].Dest_fd
+ rawinfo.Dest_offset = value.Info[i].Dest_offset
+ rawinfo.Bytes_deduped = value.Info[i].Bytes_deduped
+ rawinfo.Status = value.Info[i].Status
+ rawinfo.Reserved = value.Info[i].Reserved
+ }
+
+ err := ioctl(srcFd, FIDEDUPERANGE, uintptr(unsafe.Pointer(&buf[0])))
+
+ // Output
+ for i := range value.Info {
+ rawinfo := (*RawFileDedupeRangeInfo)(unsafe.Pointer(
+ uintptr(unsafe.Pointer(&buf[0])) + uintptr(SizeofRawFileDedupeRange) +
+ uintptr(i*SizeofRawFileDedupeRangeInfo)))
+ value.Info[i].Dest_fd = rawinfo.Dest_fd
+ value.Info[i].Dest_offset = rawinfo.Dest_offset
+ value.Info[i].Bytes_deduped = rawinfo.Bytes_deduped
+ value.Info[i].Status = rawinfo.Status
+ value.Info[i].Reserved = rawinfo.Reserved
+ }
+
+ return err
+}
+
+func IoctlHIDGetDesc(fd int, value *HIDRawReportDescriptor) error {
+ err := ioctl(fd, HIDIOCGRDESC, uintptr(unsafe.Pointer(value)))
+ runtime.KeepAlive(value)
+ return err
+}
+
+func IoctlHIDGetRawInfo(fd int) (*HIDRawDevInfo, error) {
+ var value HIDRawDevInfo
+ err := ioctl(fd, HIDIOCGRAWINFO, uintptr(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])))
+ return ByteSliceToString(value[:]), err
+}
+
+func IoctlHIDGetRawPhys(fd int) (string, error) {
+ var value [_HIDIOCGRAWPHYS_LEN]byte
+ err := ioctl(fd, _HIDIOCGRAWPHYS, uintptr(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])))
+ return ByteSliceToString(value[:]), err
+}
diff --git a/unix/syscall_linux.go b/unix/syscall_linux.go
index c61c963..4263953 100644
--- a/unix/syscall_linux.go
+++ b/unix/syscall_linux.go
@@ -70,192 +70,7 @@
// ioctl itself should not be exposed directly, but additional get/set
// functions for specific types are permissible.
-
-// IoctlRetInt performs an ioctl operation specified by req on a device
-// associated with opened file descriptor fd, and returns a non-negative
-// integer that is returned by the ioctl syscall.
-func IoctlRetInt(fd int, req uint) (int, error) {
- ret, _, err := Syscall(SYS_IOCTL, uintptr(fd), uintptr(req), 0)
- if err != 0 {
- return 0, err
- }
- return int(ret), nil
-}
-
-func IoctlSetRTCTime(fd int, value *RTCTime) error {
- err := ioctl(fd, RTC_SET_TIME, uintptr(unsafe.Pointer(value)))
- runtime.KeepAlive(value)
- return err
-}
-
-func IoctlSetRTCWkAlrm(fd int, value *RTCWkAlrm) error {
- err := ioctl(fd, RTC_WKALM_SET, uintptr(unsafe.Pointer(value)))
- runtime.KeepAlive(value)
- return err
-}
-
-func IoctlGetUint32(fd int, req uint) (uint32, error) {
- var value uint32
- err := ioctl(fd, req, uintptr(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)))
- return &value, err
-}
-
-type ifreqEthtool struct {
- name [IFNAMSIZ]byte
- data unsafe.Pointer
-}
-
-// 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
- }
-
- 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)
- return &value, err
-}
-
-// IoctlGetWatchdogInfo fetches information about a watchdog device from the
-// Linux watchdog API. For more information, see:
-// 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)))
- return &value, err
-}
-
-func IoctlGetRTCWkAlrm(fd int) (*RTCWkAlrm, error) {
- var value RTCWkAlrm
- err := ioctl(fd, RTC_WKALM_RD, uintptr(unsafe.Pointer(&value)))
- return &value, err
-}
-
-// IoctlFileCloneRange performs an FICLONERANGE ioctl operation to clone the
-// 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
-}
-
-// IoctlFileClone performs an FICLONE ioctl operation to clone the entire file
-// associated with the file description srcFd to the file associated with the
-// file descriptor destFd. See the ioctl_ficlone(2) man page for details.
-func IoctlFileClone(destFd, srcFd int) error {
- return ioctl(destFd, FICLONE, uintptr(srcFd))
-}
-
-type FileDedupeRange struct {
- Src_offset uint64
- Src_length uint64
- Reserved1 uint16
- Reserved2 uint32
- Info []FileDedupeRangeInfo
-}
-
-type FileDedupeRangeInfo struct {
- Dest_fd int64
- Dest_offset uint64
- Bytes_deduped uint64
- Status int32
- Reserved uint32
-}
-
-// IoctlFileDedupeRange performs an FIDEDUPERANGE ioctl operation to share the
-// range of data conveyed in value from the file associated with the file
-// descriptor srcFd to the value.Info destinations. See the
-// ioctl_fideduperange(2) man page for details.
-func IoctlFileDedupeRange(srcFd int, value *FileDedupeRange) error {
- buf := make([]byte, SizeofRawFileDedupeRange+
- len(value.Info)*SizeofRawFileDedupeRangeInfo)
- rawrange := (*RawFileDedupeRange)(unsafe.Pointer(&buf[0]))
- rawrange.Src_offset = value.Src_offset
- rawrange.Src_length = value.Src_length
- rawrange.Dest_count = uint16(len(value.Info))
- rawrange.Reserved1 = value.Reserved1
- rawrange.Reserved2 = value.Reserved2
-
- for i := range value.Info {
- rawinfo := (*RawFileDedupeRangeInfo)(unsafe.Pointer(
- uintptr(unsafe.Pointer(&buf[0])) + uintptr(SizeofRawFileDedupeRange) +
- uintptr(i*SizeofRawFileDedupeRangeInfo)))
- rawinfo.Dest_fd = value.Info[i].Dest_fd
- rawinfo.Dest_offset = value.Info[i].Dest_offset
- rawinfo.Bytes_deduped = value.Info[i].Bytes_deduped
- rawinfo.Status = value.Info[i].Status
- rawinfo.Reserved = value.Info[i].Reserved
- }
-
- err := ioctl(srcFd, FIDEDUPERANGE, uintptr(unsafe.Pointer(&buf[0])))
-
- // Output
- for i := range value.Info {
- rawinfo := (*RawFileDedupeRangeInfo)(unsafe.Pointer(
- uintptr(unsafe.Pointer(&buf[0])) + uintptr(SizeofRawFileDedupeRange) +
- uintptr(i*SizeofRawFileDedupeRangeInfo)))
- value.Info[i].Dest_fd = rawinfo.Dest_fd
- value.Info[i].Dest_offset = rawinfo.Dest_offset
- value.Info[i].Bytes_deduped = rawinfo.Bytes_deduped
- value.Info[i].Status = rawinfo.Status
- value.Info[i].Reserved = rawinfo.Reserved
- }
-
- return err
-}
-
-// IoctlWatchdogKeepalive issues a keepalive ioctl to a watchdog device. For
-// more information, see:
-// https://www.kernel.org/doc/html/latest/watchdog/watchdog-api.html.
-func IoctlWatchdogKeepalive(fd int) error {
- return ioctl(fd, WDIOC_KEEPALIVE, 0)
-}
-
-func IoctlHIDGetDesc(fd int, value *HIDRawReportDescriptor) error {
- err := ioctl(fd, HIDIOCGRDESC, uintptr(unsafe.Pointer(value)))
- runtime.KeepAlive(value)
- return err
-}
-
-func IoctlHIDGetRawInfo(fd int) (*HIDRawDevInfo, error) {
- var value HIDRawDevInfo
- err := ioctl(fd, HIDIOCGRAWINFO, uintptr(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])))
- return ByteSliceToString(value[:]), err
-}
-
-func IoctlHIDGetRawPhys(fd int) (string, error) {
- var value [_HIDIOCGRAWPHYS_LEN]byte
- err := ioctl(fd, _HIDIOCGRAWPHYS, uintptr(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])))
- return ByteSliceToString(value[:]), err
-}
+// These are defined in ioctl.go and ioctl_linux.go.
//sys Linkat(olddirfd int, oldpath string, newdirfd int, newpath string, flags int) (err error)
