From 0829ab15b6946f47c40012db2e0c04772730317d Mon Sep 17 00:00:00 2001
From: Kanak Agrawal <kanak@clumio.com>
Date: Wed, 9 Aug 2023 11:53:20 +0530
Subject: [PATCH] windows: add SetFileValidData

Fixes golang/go#61834

Change-Id: Iaff01f5662aa2309e8ac41b346e0d3a42d28af91
Reviewed-on: https://go-review.googlesource.com/c/sys/+/517575
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Alex Brainman <alex.brainman@gmail.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Quim Muntal <quimmuntal@gmail.com>
Reviewed-by: Quim Muntal <quimmuntal@gmail.com>
Reviewed-by: Keith Randall <khr@google.com>
---
 windows/syscall_windows.go  | 1 +
 windows/zsyscall_windows.go | 9 +++++++++
 2 files changed, 10 insertions(+)

diff --git a/windows/syscall_windows.go b/windows/syscall_windows.go
index 47dc57967..ffb8708cc 100644
--- a/windows/syscall_windows.go
+++ b/windows/syscall_windows.go
@@ -194,6 +194,7 @@ func NewCallbackCDecl(fn interface{}) uintptr {
 //sys	GetComputerName(buf *uint16, n *uint32) (err error) = GetComputerNameW
 //sys	GetComputerNameEx(nametype uint32, buf *uint16, n *uint32) (err error) = GetComputerNameExW
 //sys	SetEndOfFile(handle Handle) (err error)
+//sys	SetFileValidData(handle Handle, validDataLength int64) (err error)
 //sys	GetSystemTimeAsFileTime(time *Filetime)
 //sys	GetSystemTimePreciseAsFileTime(time *Filetime)
 //sys	GetTimeZoneInformation(tzi *Timezoneinformation) (rc uint32, err error) [failretval==0xffffffff]
diff --git a/windows/zsyscall_windows.go b/windows/zsyscall_windows.go
index 146a1f019..e8791c82c 100644
--- a/windows/zsyscall_windows.go
+++ b/windows/zsyscall_windows.go
@@ -342,6 +342,7 @@ var (
 	procSetDefaultDllDirectories                             = modkernel32.NewProc("SetDefaultDllDirectories")
 	procSetDllDirectoryW                                     = modkernel32.NewProc("SetDllDirectoryW")
 	procSetEndOfFile                                         = modkernel32.NewProc("SetEndOfFile")
+	procSetFileValidData                                     = modkernel32.NewProc("SetFileValidData")
 	procSetEnvironmentVariableW                              = modkernel32.NewProc("SetEnvironmentVariableW")
 	procSetErrorMode                                         = modkernel32.NewProc("SetErrorMode")
 	procSetEvent                                             = modkernel32.NewProc("SetEvent")
@@ -2988,6 +2989,14 @@ func SetEndOfFile(handle Handle) (err error) {
 	return
 }
 
+func SetFileValidData(handle Handle, validDataLength int64) (err error) {
+	r1, _, e1 := syscall.Syscall(procSetFileValidData.Addr(), 2, uintptr(handle), uintptr(validDataLength), 0)
+	if r1 == 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
 func SetEnvironmentVariable(name *uint16, value *uint16) (err error) {
 	r1, _, e1 := syscall.Syscall(procSetEnvironmentVariableW.Addr(), 2, uintptr(unsafe.Pointer(name)), uintptr(unsafe.Pointer(value)), 0)
 	if r1 == 0 {