2 files changed, 32 insertions, 0 deletions
diff --git a/lib/std/os/windows.zig b/lib/std/os/windows.zig
index 36b84d657b..b385f68194 100644
--- a/lib/std/os/windows.zig
+++ b/lib/std/os/windows.zig
@@ -2452,6 +2452,29 @@ pub const FILE_INFORMATION_CLASS = enum(c_int) {
     FileMaximumInformation,
 };
 
+pub const FILE_FS_DEVICE_INFORMATION = extern struct {
+    DeviceType: DEVICE_TYPE,
+    Characteristics: ULONG,
+};
+
+pub const FS_INFORMATION_CLASS = enum(c_int) {
+    FileFsVolumeInformation = 1,
+    FileFsLabelInformation,
+    FileFsSizeInformation,
+    FileFsDeviceInformation,
+    FileFsAttributeInformation,
+    FileFsControlInformation,
+    FileFsFullSizeInformation,
+    FileFsObjectIdInformation,
+    FileFsDriverPathInformation,
+    FileFsVolumeFlagsInformation,
+    FileFsSectorSizeInformation,
+    FileFsDataCopyInformation,
+    FileFsMetadataSizeInformation,
+    FileFsFullSizeInformationEx,
+    FileFsMaximumInformation,
+};
+
 pub const OVERLAPPED = extern struct {
     Internal: ULONG_PTR,
     InternalHigh: ULONG_PTR,
diff --git a/lib/std/os/windows/ntdll.zig b/lib/std/os/windows/ntdll.zig
index 8c5260c1bc..58cba356a2 100644
--- a/lib/std/os/windows/ntdll.zig
+++ b/lib/std/os/windows/ntdll.zig
@@ -18,6 +18,7 @@ const IO_STATUS_BLOCK = windows.IO_STATUS_BLOCK;
 const LARGE_INTEGER = windows.LARGE_INTEGER;
 const OBJECT_INFORMATION_CLASS = windows.OBJECT_INFORMATION_CLASS;
 const FILE_INFORMATION_CLASS = windows.FILE_INFORMATION_CLASS;
+const FS_INFORMATION_CLASS = windows.FS_INFORMATION_CLASS;
 const UNICODE_STRING = windows.UNICODE_STRING;
 const RTL_OSVERSIONINFOW = windows.RTL_OSVERSIONINFOW;
 const FILE_BASIC_INFORMATION = windows.FILE_BASIC_INFORMATION;
@@ -232,6 +233,14 @@ pub extern "ntdll" fn NtQueryObject(
     ReturnLength: ?*ULONG,
 ) callconv(WINAPI) NTSTATUS;
 
+pub extern "ntdll" fn NtQueryVolumeInformationFile(
+    FileHandle: HANDLE,
+    IoStatusBlock: *IO_STATUS_BLOCK,
+    FsInformation: *anyopaque,
+    Length: ULONG,
+    FsInformationClass: FS_INFORMATION_CLASS,
+) callconv(WINAPI) NTSTATUS;
+
 pub extern "ntdll" fn RtlWakeAddressAll(
     Address: ?*const anyopaque,
 ) callconv(WINAPI) void;