[fireball] 43203: [fastfat_new] - Add an internal routine for opening root DCB (a stub for now). - Add code for checking if this is a relative or absolute open. Start implementing absolute opening part.

Author: fireball
Date: Mon Sep 28 13:02:34 2009
New Revision: 43203

URL: http://svn.reactos.org/svn/reactos?rev=43203&view=rev
Log:
[fastfat_new]
- Add an internal routine for opening root DCB (a stub for now).
- Add code for checking if this is a relative or absolute open. Start implementing
absolute opening part.

Modified:
    trunk/reactos/drivers/filesystems/fastfat_new/create.c
    trunk/reactos/drivers/filesystems/fastfat_new/fatstruc.h

Modified: trunk/reactos/drivers/filesystems/fastfat_new/create.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/drivers/filesystems/fastfa…
==============================================================================
--- trunk/reactos/drivers/filesystems/fastfat_new/create.c [iso-8859-1] (original)
+++ trunk/reactos/drivers/filesystems/fastfat_new/create.c [iso-8859-1] Mon Sep 28
13:02:34 2009
@@ -12,6 +12,24 @@
 #include "fastfat.h"
 
 /* FUNCTIONS *****************************************************************/
+
+IO_STATUS_BLOCK
+NTAPI
+FatiOpenRootDcb(IN PFAT_IRP_CONTEXT IrpContext,
+                IN PFILE_OBJECT FileObject,
+                IN PVCB Vcb,
+                IN PACCESS_MASK DesiredAccess,
+                IN USHORT ShareAccess,
+                IN ULONG CreateDisposition)
+{
+    IO_STATUS_BLOCK Iosb;
+
+    DPRINT1("Opening root directory\n");
+
+    Iosb.Status = STATUS_NOT_IMPLEMENTED;
+
+    return Iosb;
+}
 
 NTSTATUS
 NTAPI
@@ -36,6 +54,7 @@
     PVCB Vcb, DecodedVcb;
     PFCB Fcb;
     PCCB Ccb;
+    PFCB ParentDcb;
 
     /* IRP data */
     PFILE_OBJECT FileObject;
@@ -51,7 +70,7 @@
 
     /* Misc */
     NTSTATUS Status;
-    //IO_STATUS_BLOCK Iosb;
+    IO_STATUS_BLOCK Iosb;
     PIO_STACK_LOCATION IrpSp;
 
     /* Get current IRP stack location */
@@ -184,10 +203,10 @@
 
     // TODO: Make sure EAs aren't supported on FAT32
 
+    /* Check if it's a volume open request */
     if (FileName.Length == 0)
     {
-        /* It is a volume open request, check related FO to be sure */
-
+        /* Test related FO to be sure */
         if (!RelatedFO ||
             FatDecodeFileObject(RelatedFO, &DecodedVcb, &Fcb, &Ccb) ==
UserVolumeOpen)
         {
@@ -197,6 +216,58 @@
         }
     }
 
+    /* Check if this is a relative open */
+    if (RelatedFO)
+    {
+        // RelatedFO will be a parent directory
+        UNIMPLEMENTED;
+    }
+    else
+    {
+        /* Absolute open */
+        if ((FileName.Length == sizeof(WCHAR)) &&
+            (FileName.Buffer[0] == L'\\'))
+        {
+            /* Check if it's ok to open it */
+            if (NonDirectoryFile)
+            {
+                DPRINT1("Trying to open root dir as a file\n");
+
+                /* Cleanup and return */
+                FatReleaseVcb(IrpContext, Vcb);
+                return STATUS_FILE_IS_A_DIRECTORY;
+            }
+
+            /* Check delete on close on a root dir */
+            if (DeleteOnClose)
+            {
+                /* Cleanup and return */
+                FatReleaseVcb(IrpContext, Vcb);
+                return STATUS_CANNOT_DELETE;
+            }
+
+            /* Call root directory open routine */
+            Iosb = FatiOpenRootDcb(IrpContext,
+                                   FileObject,
+                                   Vcb,
+                                   DesiredAccess,
+                                   ShareAccess,
+                                   CreateDisposition);
+
+            Irp->IoStatus.Information = Iosb.Information;
+
+            /* Cleanup and return */
+            FatReleaseVcb(IrpContext, Vcb);
+            return Iosb.Status;
+        }
+        else
+        {
+            /* Not a root dir */
+            ParentDcb = Vcb->RootDcb;
+            DPRINT1("ParentDcb %p\n", ParentDcb);
+        }
+    }
+
     //return Iosb.Status;
     return STATUS_SUCCESS;
 }

Modified: trunk/reactos/drivers/filesystems/fastfat_new/fatstruc.h
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/drivers/filesystems/fastfa…
==============================================================================
--- trunk/reactos/drivers/filesystems/fastfat_new/fatstruc.h [iso-8859-1] (original)
+++ trunk/reactos/drivers/filesystems/fastfat_new/fatstruc.h [iso-8859-1] Mon Sep 28
13:02:34 2009
@@ -170,8 +170,9 @@
     ULONG RootDirentSectors;
     LONGLONG BeyondLastClusterInFat;
     FAT_METHODS Methods;
-    /*  Root Directory Fcb: */
-    struct _FCB *RootFcb;
+
+    /*  Root Directory Control block */
+    struct _FCB *RootDcb;
 
     ULONG MediaChangeCount;
 } VCB, *PVCB;