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unix: add IoctlLoop{Get,Set}Status64 on linux

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These ioctls are used to get/set the status of a loop device. See
https://man7.org/linux/man-pages/man4/loop.4.html for details.

Change-Id: Ia66db639e6d9326af79954eea5c8f7515aa171d1
Reviewed-on: https://go-review.googlesource.com/c/sys/+/425296
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Ian Lance Taylor <iant@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
Reviewed-by: Heschi Kreinick <heschi@google.com>
This commit is contained in:
Tobias Klauser
2022-08-24 13:40:16 +02:00
committed by Gopher Robot
parent c680a09ffe
commit 2c41d75977
1 changed files with 17 additions and 3 deletions
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20
unix/ioctl_linux.go
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@@ -4,9 +4,7 @@
package unix
import (
"unsafe"
)
import "unsafe"
// IoctlRetInt performs an ioctl operation specified by req on a device
// associated with opened file descriptor fd, and returns a non-negative
@@ -217,3 +215,19 @@ func IoctlKCMAttach(fd int, info KCMAttach) error {
func IoctlKCMUnattach(fd int, info KCMUnattach) error {
return ioctlPtr(fd, SIOCKCMUNATTACH, unsafe.Pointer(&info))
}
// IoctlLoopGetStatus64 gets the status of the loop device associated with the
// file descriptor fd using the LOOP_GET_STATUS64 operation.
func IoctlLoopGetStatus64(fd int) (*LoopInfo64, error) {
var value LoopInfo64
if err := ioctlPtr(fd, LOOP_GET_STATUS64, unsafe.Pointer(&value)); err != nil {
return nil, err
}
return &value, nil
}
// IoctlLoopSetStatus64 sets the status of the loop device associated with the
// file descriptor fd using the LOOP_SET_STATUS64 operation.
func IoctlLoopSetStatus64(fd int, value *LoopInfo64) error {
return ioctlPtr(fd, LOOP_SET_STATUS64, unsafe.Pointer(value))
}