[PATCH 1/3] ntdll: NtReadFileScatter always returns asynchronously

[Andrew Eikum]

This patch sequence fixes Wolfenstein II, Bug 43935.

Signed-off-by: Andrew Eikum 
---
 dlls/kernel32/tests/file.c | 28 ++++++++++++++++++++--------
 dlls/ntdll/file.c          |  4 +++-
 2 files changed, 23 insertions(+), 9 deletions(-)

diff --git a/dlls/kernel32/tests/file.c b/dlls/kernel32/tests/file.c
index 0b8cef23f8..44fbf7a4b1 100644
--- a/dlls/kernel32/tests/file.c
+++ b/dlls/kernel32/tests/file.c
@@ -4353,7 +4353,8 @@ static void test_WriteFileGather(void)
     FILE_SEGMENT_ELEMENT fse[2];
     OVERLAPPED ovl, *povl = NULL;
     SYSTEM_INFO si;
-    LPVOID buf = NULL;
+    BOOL br;
+    char *wbuf = NULL, *rbuf1;

ret = GetTempPathA( MAX_PATH, temp_path );
     ok( ret != 0, "GetTempPathA error %d\n", GetLastError() );
@@ -4371,12 +4372,16 @@ static void test_WriteFileGather(void)
     ok( hiocp2 != 0, "CreateIoCompletionPort failed err %u\n", GetLastError() );

GetSystemInfo( &si );
-    buf = VirtualAlloc( NULL, si.dwPageSize, MEM_COMMIT, PAGE_READWRITE );
-    ok( buf != NULL, "VirtualAlloc failed err %u\n", GetLastError() );
+    wbuf = VirtualAlloc( NULL, si.dwPageSize, MEM_COMMIT, PAGE_READWRITE );
+    ok( wbuf != NULL, "VirtualAlloc failed err %u\n", GetLastError() );
+
+    rbuf1 = VirtualAlloc( NULL, si.dwPageSize, MEM_COMMIT, PAGE_READWRITE );
+    ok( rbuf1 != NULL, "VirtualAlloc failed err %u\n", GetLastError() );

memset( &ovl, 0, sizeof(ovl) );
     memset( fse, 0, sizeof(fse) );
-    fse[0].Buffer = buf;
+    memset( wbuf, 0x42, si.dwPageSize );
+    fse[0].Buffer = wbuf;
     if (!WriteFileGather( hfile, fse, si.dwPageSize, NULL, &ovl ))
         ok( GetLastError() == ERROR_IO_PENDING, "WriteFileGather failed err %u\n", GetLastError() );

@@ -4384,20 +4389,27 @@ static void test_WriteFileGather(void)
     ok( ret, "GetQueuedCompletionStatus failed err %u\n", GetLastError());
     ok( povl == &ovl, "wrong ovl %p\n", povl );

+    /* read exact size */
     memset( &ovl, 0, sizeof(ovl) );
     memset( fse, 0, sizeof(fse) );
-    fse[0].Buffer = buf;
-    if (!ReadFileScatter( hfile, fse, si.dwPageSize, NULL, &ovl ))
-        ok( GetLastError() == ERROR_IO_PENDING, "ReadFileScatter failed err %u\n", GetLastError() );
+    fse[0].Buffer = rbuf1;
+    memset( rbuf1, 0, si.dwPageSize );
+    br = ReadFileScatter( hfile, fse, si.dwPageSize, NULL, &ovl );
+    ok( br == FALSE, "ReadFileScatter should be asynchronous\n" );
+    ok( GetLastError() == ERROR_IO_PENDING, "ReadFileScatter failed err %u\n", GetLastError() );

ret = GetQueuedCompletionStatus( hiocp2, &size, &key, &povl, 1000 );
     ok( ret, "GetQueuedCompletionStatus failed err %u\n", GetLastError());
     ok( povl == &ovl, "wrong ovl %p\n", povl );

+    ok( memcmp( rbuf1, wbuf, si.dwPageSize ) == 0,
+            "data was not read into buffer\n" );
+
     CloseHandle( hfile );
     CloseHandle( hiocp1 );
     CloseHandle( hiocp2 );
-    VirtualFree( buf, 0, MEM_RELEASE );
+    VirtualFree( wbuf, 0, MEM_RELEASE );
+    VirtualFree( rbuf1, 0, MEM_RELEASE );
     DeleteFileA( filename );
 }

diff --git a/dlls/ntdll/file.c b/dlls/ntdll/file.c
index ca2afa0e89..bdfc383d7e 100644
--- a/dlls/ntdll/file.c
+++ b/dlls/ntdll/file.c
@@ -1090,7 +1090,9 @@ NTSTATUS WINAPI NtReadFileScatter( HANDLE file, HANDLE event, PIO_APC_ROUTINE ap
     if (needs_close) close( unix_handle );
     if (status == STATUS_SUCCESS)
     {
-        io_status->u.Status = status;
+        /* report status asynchronously */
+        status = STATUS_PENDING;
+        io_status->u.Status = STATUS_SUCCESS;
         io_status->Information = total;
         TRACE("= SUCCESS (%u)\n", total);
         if (event) NtSetEvent( event, NULL );