From 48f9ff52cf343e235987b542ce5c12e4d1e4c072 Mon Sep 17 00:00:00 2001
From: Evgenii Kozlov <e.kozlov@searchinform.ru>
Date: Tue, 2 Jun 2020 11:52:16 +0300
Subject: [PATCH] Discs statistics on Windows platform.

---
 weed/stats/disk_notsupported.go |  2 +-
 weed/stats/disk_windows.go      | 46 +++++++++++++++++++++++++++++++++
 2 files changed, 47 insertions(+), 1 deletion(-)
 create mode 100644 weed/stats/disk_windows.go

diff --git a/weed/stats/disk_notsupported.go b/weed/stats/disk_notsupported.go
index ace662f6a..3d99e6ce7 100644
--- a/weed/stats/disk_notsupported.go
+++ b/weed/stats/disk_notsupported.go
@@ -1,4 +1,4 @@
-// +build windows openbsd netbsd plan9 solaris
+// +build openbsd netbsd plan9 solaris
 
 package stats
 
diff --git a/weed/stats/disk_windows.go b/weed/stats/disk_windows.go
new file mode 100644
index 000000000..1185e129c
--- /dev/null
+++ b/weed/stats/disk_windows.go
@@ -0,0 +1,46 @@
+package stats
+
+import (
+	"github.com/chrislusf/seaweedfs/weed/pb/volume_server_pb"
+	"golang.org/x/sys/windows"
+	"syscall"
+	"unsafe"
+)
+var (
+	kernel32           = windows.NewLazySystemDLL("Kernel32.dll")
+	getDiskFreeSpaceEx = kernel32.NewProc("GetDiskFreeSpaceExW")
+)
+
+func fillInDiskStatus(disk *volume_server_pb.DiskStatus) {
+
+	ptr, err := syscall.UTF16PtrFromString(disk.Dir)
+
+	if err != nil {
+		return
+	}
+	var _temp uint64
+	/* #nosec */
+	r, _, e := syscall.Syscall6(
+		getDiskFreeSpaceEx.Addr(),
+		4,
+		uintptr(unsafe.Pointer(ptr)),
+		uintptr(unsafe.Pointer(&disk.Free)),
+		uintptr(unsafe.Pointer(&disk.All)),
+		uintptr(unsafe.Pointer(&_temp)),
+		0,
+		0,
+	)
+
+	if r == 0 {
+		if e != 0 {
+			return
+		}
+
+		return
+	}
+	disk.Used = disk.All - disk.Free
+	disk.PercentFree = float32((float64(disk.Free) / float64(disk.All)) * 100)
+	disk.PercentUsed = float32((float64(disk.Used) / float64(disk.All)) * 100)
+
+	return
+}