[hbelusca] 59803: [NTOSKRNL] We aim at being compatible with Windows Server 2003... Do it better! Use the \GLOBAL?? dos-devices object directory instead of \??, as used in Windows NT and 2000 (whic...

Author: hbelusca
Date: Fri Aug 23 21:18:46 2013
New Revision: 59803

URL: http://svn.reactos.org/svn/reactos?rev=59803&view=rev
Log:
[NTOSKRNL]
We aim at being compatible with Windows Server 2003... Do it better! Use the \GLOBAL?? dos-devices object directory instead of ??, as used in Windows NT and 2000 (which becomes per-session in Windows >= XP), but add a temporary hack (i.e. create a symbolic link ?? <---> \GLOBAL??) since we don't support yet Ob device mappings which are needed for this mapping, in particular.
As a side-effect, fix starting of DeviceTree v2.30 on ReactOS. Now it works correctly, as on Win2k3 :)

CORE-6572 #resolve #comment Finally fix loading of the objinfo driver, which failed at creating a symbolic link in \GLOBAL??\ for its device.

Modified:
    trunk/reactos/ntoskrnl/ob/obname.c

Modified: trunk/reactos/ntoskrnl/ob/obname.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/ob/obname.c?rev=59...
==============================================================================
--- trunk/reactos/ntoskrnl/ob/obname.c	[iso-8859-1] (original)
+++ trunk/reactos/ntoskrnl/ob/obname.c	[iso-8859-1] Fri Aug 23 21:18:46 2013
@@ -37,25 +37,48 @@
 ObpCreateDosDevicesDirectory(VOID)
 {
     OBJECT_ATTRIBUTES ObjectAttributes;
-    UNICODE_STRING Name, LinkName;
+    UNICODE_STRING RootName, TargetName, LinkName;
     HANDLE Handle, SymHandle;
     NTSTATUS Status;

-    /* Create the '??' directory */
-    RtlInitUnicodeString(&Name, L"\??");
+    /* Create the global DosDevices directory ?? */
+    RtlInitUnicodeString(&RootName, L"\GLOBAL??");
     InitializeObjectAttributes(&ObjectAttributes,
-                               &Name,
+                               &RootName,
                                OBJ_PERMANENT,
                                NULL,
                                NULL);
     Status = NtCreateDirectoryObject(&Handle,
                                      DIRECTORY_ALL_ACCESS,
                                      &ObjectAttributes);
-    if (!NT_SUCCESS(Status)) return FALSE;
-
-    /* Initialize the GLOBALROOT path */
+    if (!NT_SUCCESS(Status)) return Status;
+
+    /*********************************************\
+    |*** HACK until we support device mappings ***|
+    |*** Add a symlink ??\ <--> \GLOBAL??\    ***|
+    *********************************************/
+    RtlInitUnicodeString(&LinkName, L"\??");
+    InitializeObjectAttributes(&ObjectAttributes,
+                               &LinkName,
+                               OBJ_PERMANENT,
+                               NULL,
+                               NULL);
+    Status = NtCreateSymbolicLinkObject(&SymHandle,
+                                        SYMBOLIC_LINK_ALL_ACCESS,
+                                        &ObjectAttributes,
+                                        &RootName);
+    if (NT_SUCCESS(Status)) NtClose(SymHandle);
+    /*********************************************\
+    *********************************************/
+
+    // FIXME: Create a device mapping for the global ?? directory
+
+    /*
+     * Initialize the ??\GLOBALROOT symbolic link
+     * pointing to the root directory \ .
+     */
     RtlInitUnicodeString(&LinkName, L"GLOBALROOT");
-    RtlInitUnicodeString(&Name, L"");
+    RtlInitUnicodeString(&TargetName, L"");
     InitializeObjectAttributes(&ObjectAttributes,
                                &LinkName,
                                OBJ_PERMANENT,
@@ -64,12 +87,16 @@
     Status = NtCreateSymbolicLinkObject(&SymHandle,
                                         SYMBOLIC_LINK_ALL_ACCESS,
                                         &ObjectAttributes,
-                                        &Name);
+                                        &TargetName);
     if (NT_SUCCESS(Status)) NtClose(SymHandle);

-    /* Link ??\Global to ?? */
+    /*
+     * Initialize the ??\Global symbolic link pointing to the global
+     * DosDevices directory ?? . It is used to access the global ??
+     * by user-mode components which, by default, use a per-session
+     * DosDevices directory.
+     */
     RtlInitUnicodeString(&LinkName, L"Global");
-    RtlInitUnicodeString(&Name, L"\??");
     InitializeObjectAttributes(&ObjectAttributes,
                                &LinkName,
                                OBJ_PERMANENT,
@@ -78,15 +105,20 @@
     Status = NtCreateSymbolicLinkObject(&SymHandle,
                                         SYMBOLIC_LINK_ALL_ACCESS,
                                         &ObjectAttributes,
-                                        &Name);
+                                        &RootName);
     if (NT_SUCCESS(Status)) NtClose(SymHandle);

/* Close the directory handle */
     NtClose(Handle);
     if (!NT_SUCCESS(Status)) return Status;

-    /* Create link from '\DosDevices' to '??' directory */
+    /*
+     * Initialize the \DosDevices symbolic link pointing to the global
+     * DosDevices directory ?? , for backward compatibility with
+     * Windows NT-2000 systems.
+     */
     RtlCreateUnicodeString(&LinkName, L"\DosDevices");
+    RtlInitUnicodeString(&RootName, (PCWSTR)&ObpDosDevicesShortNameRoot);
     InitializeObjectAttributes(&ObjectAttributes,
                                &LinkName,
                                OBJ_PERMANENT,
@@ -95,7 +127,7 @@
     Status = NtCreateSymbolicLinkObject(&SymHandle,
                                         SYMBOLIC_LINK_ALL_ACCESS,
                                         &ObjectAttributes,
-                                        &Name);
+                                        &RootName);
     if (NT_SUCCESS(Status)) NtClose(SymHandle);

/* FIXME: Hack Hack! */