[fireball] 43207: [fastfat_new] - Create root DCB when mounting a volume.

Author: fireball
Date: Mon Sep 28 20:04:31 2009
New Revision: 43207

URL: http://svn.reactos.org/svn/reactos?rev=43207&view=rev
Log:
[fastfat_new]
- Create root DCB when mounting a volume.

Modified:
    trunk/reactos/drivers/filesystems/fastfat_new/dir.c
    trunk/reactos/drivers/filesystems/fastfat_new/fastfat.h
    trunk/reactos/drivers/filesystems/fastfat_new/fatstruc.h
    trunk/reactos/drivers/filesystems/fastfat_new/fsctl.c

Modified: trunk/reactos/drivers/filesystems/fastfat_new/dir.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/drivers/filesystems/fastfa…
==============================================================================
--- trunk/reactos/drivers/filesystems/fastfat_new/dir.c [iso-8859-1] (original)
+++ trunk/reactos/drivers/filesystems/fastfat_new/dir.c [iso-8859-1] Mon Sep 28 20:04:31
2009
@@ -21,4 +21,107 @@
     return STATUS_NOT_IMPLEMENTED;
 }
 
+VOID
+NTAPI
+FatCreateRootDcb(IN PFAT_IRP_CONTEXT IrpContext,
+                 IN PVCB Vcb)
+{
+    PFCB Dcb;
+
+    /* Make sure it's not already created */
+    ASSERT(!Vcb->RootDcb);
+
+    /* Allocate the DCB */
+    Dcb = FsRtlAllocatePoolWithTag(NonPagedPool,
+                                   sizeof(FCB),
+                                   TAG_FCB);
+
+    /* Zero it */
+    RtlZeroMemory(Dcb, sizeof(FCB));
+
+    /* Assign it to the VCB */
+    Vcb->RootDcb = Dcb;
+
+    /* Set its header */
+    Dcb->Header.NodeTypeCode = FAT_NTC_ROOT_DCB;
+    Dcb->Header.NodeByteSize = sizeof(FCB);
+
+    /* FCB is in a good condition */
+    Dcb->Condition = FcbGood;
+
+    /* Initialize FCB's resource */
+    Dcb->Header.Resource = &Dcb->Resource;
+    ExInitializeResourceLite(&Dcb->Resource);
+
+    /* Initialize Paging Io resource*/
+    Dcb->Header.PagingIoResource = &Dcb->PagingIoResource;
+    ExInitializeResourceLite(&Dcb->PagingIoResource);
+
+    /* Initialize a list of parent DCBs*/
+    InitializeListHead(&Dcb->ParentDcbLinks);
+
+    /* Set VCB */
+    Dcb->Vcb = Vcb;
+
+    /* Initialize parent's DCB list */
+    InitializeListHead(&Dcb->Dcb.ParentDcbList);
+
+    /* Initialize the full file name */
+    Dcb->FullFileName.Buffer = L"\\";
+    Dcb->FullFileName.Length = 1 * sizeof(WCHAR);
+    Dcb->FullFileName.MaximumLength = 2 * sizeof(WCHAR);
+
+    Dcb->FileName.Name.Ansi.Buffer = "\\";
+    Dcb->FileName.Name.Ansi.Length = 1;
+    Dcb->FileName.Name.Ansi.MaximumLength = 2 * sizeof(CHAR);
+
+    /* Fill dirent attribute byte copy */
+    Dcb->DirentFatFlags = FILE_ATTRIBUTE_DIRECTORY;
+
+    /* Initialize advanced FCB header fields */
+    ExInitializeFastMutex(&Dcb->HeaderMutex);
+    FsRtlSetupAdvancedHeader(&Dcb->Header, &Dcb->HeaderMutex);
+
+    /* Initialize MCB */
+    FsRtlInitializeLargeMcb(&Dcb->Mcb, NonPagedPool);
+
+    /* Set up first cluster field depending on FAT type */
+    if (TRUE/*FatIsFat32(Vcb)*/)
+    {
+        /* First cluster is really the first cluster of this volume */
+        Dcb->FirstClusterOfFile = Vcb->Bpb.RootDirFirstCluster;
+
+        /* Calculate size of FAT32 root dir */
+        Dcb->Header.AllocationSize.LowPart = 0xFFFFFFFF;
+        //FatLookupFileAllocationSize(IrpContext, Dcb);
+        DPRINT1("Calculation of a size of a root dir is missing!\n");
+
+        Dcb->Header.FileSize.QuadPart = Dcb->Header.AllocationSize.QuadPart;
+    }
+    else
+    {
+#if 0
+        /* Add MCB entry */
+        FatAddMcbEntry(Vcb,
+                       &Dcb->Mcb,
+                       0,
+                       FatRootDirectoryLbo(&Vcb->Bpb),
+                       FatRootDirectorySize(&Vcb->Bpb));
+
+        /* Set a real size of the root directory */
+        Dcb->Header.FileSize.QuadPart = FatRootDirectorySize(&Vcb->Bpb);
+        Dcb->Header.AllocationSize.QuadPart = Dcb->Header.FileSize.QuadPart;
+#endif
+        UNIMPLEMENTED;
+    }
+
+    /* Initialize free dirent bitmap */
+    RtlInitializeBitMap(&Dcb->Dcb.FreeBitmap, NULL, 0);
+
+    /* Fill the dirent bitmap */
+    DPRINT1("Filling the free dirent bitmap is missing\n");
+    //FatCheckFreeDirentBitmap( IrpContext, Dcb );
+}
+
+
 /* EOF */

Modified: trunk/reactos/drivers/filesystems/fastfat_new/fastfat.h
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/drivers/filesystems/fastfa…
==============================================================================
--- trunk/reactos/drivers/filesystems/fastfat_new/fastfat.h [iso-8859-1] (original)
+++ trunk/reactos/drivers/filesystems/fastfat_new/fastfat.h [iso-8859-1] Mon Sep 28
20:04:31 2009
@@ -71,6 +71,10 @@
 
 NTSTATUS NTAPI
 FatDirectoryControl(PDEVICE_OBJECT DeviceObject, PIRP Irp);
+
+VOID NTAPI
+FatCreateRootDcb(IN PFAT_IRP_CONTEXT IrpContext,
+                 IN PVCB Vcb);
 
 /*  --------------------------------------------------------  create.c  */
 

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
20:04:31 2009
@@ -215,9 +215,20 @@
 
 typedef struct _FCB_NAME_LINK {
     RTL_SPLAY_LINKS Links;
-    UNICODE_STRING String;
+    union
+    {
+        OEM_STRING Ansi;
+        UNICODE_STRING String;
+    } Name;
     UCHAR Type;
 } FCB_NAME_LINK, *PFCB_NAME_LINK;
+
+typedef enum _FCB_CONDITION
+{
+    FcbGood,
+    FcbBad,
+    FcbNeedsToBeVerified
+} FCB_CONDITION;
 
 typedef struct _FCB
 {
@@ -228,35 +239,47 @@
     * FCB into paged and non paged parts
     * (as it is done in MS implementation
     */
-    FAST_MUTEX HeaderMutex;
+    FAST_MUTEX HeaderMutex; // nonpaged!
     SECTION_OBJECT_POINTERS SectionObjectPointers;
-    ERESOURCE Resource;
-    ERESOURCE PagingIoResource;
+    ERESOURCE Resource; // nonpaged!
+    ERESOURCE PagingIoResource; // nonpaged!
 
     FILE_LOCK Lock;
+    /* First cluster in the fat allocation chain */
+    ULONG FirstClusterOfFile;
+    /* A list of all FCBs of that DCB */
+    LIST_ENTRY ParentDcbLinks;
     /* Reference to the Parent Dcb*/
     struct _FCB *ParentFcb;
     /* Pointer to a Vcb */
     PVCB Vcb;
+    /* Fcb state */
+    ULONG State;
+    /* Fcb condition */
+    FCB_CONDITION Condition;
     /* Mcb mapping Vbo->Lbo */
     LARGE_MCB Mcb;
     ULONG FirstCluster;
     /* Links into FCB Trie */
-    FCB_NAME_LINK FileName[0x2];
+    FCB_NAME_LINK FileName;
     /* Buffer for the short name */
     WCHAR ShortNameBuffer[0xc];
     /* Full file name */
     UNICODE_STRING FullFileName;
+    /* A copy of fat attribute byte */
+    UCHAR DirentFatFlags;
     /* File basic info */
     FILE_BASIC_INFORMATION BasicInfo;
     union
     {
         struct
         {
+            /* A list of all FCBs/DCBs opened under this DCB */
+            LIST_ENTRY ParentDcbList;
             /* Directory data stream (just handy to have it). */
             PFILE_OBJECT StreamFileObject;
             /* Bitmap to search for free dirents. */
-            /* RTL_BITMAP Bitmap; */
+            RTL_BITMAP FreeBitmap;
             PRTL_SPLAY_LINKS SplayLinks;
         } Dcb;
     };

Modified: trunk/reactos/drivers/filesystems/fastfat_new/fsctl.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/drivers/filesystems/fastfa…
==============================================================================
--- trunk/reactos/drivers/filesystems/fastfat_new/fsctl.c [iso-8859-1] (original)
+++ trunk/reactos/drivers/filesystems/fastfat_new/fsctl.c [iso-8859-1] Mon Sep 28 20:04:31
2009
@@ -124,6 +124,9 @@
     Status = FatInitializeVcb(IrpContext, &VolumeDevice->Vcb, TargetDeviceObject,
Vpb);
     if (!NT_SUCCESS(Status)) goto FatMountVolumeCleanup;
 
+    /* Create root DCB for it */
+    FatCreateRootDcb(IrpContext, &VolumeDevice->Vcb);
+
     /* Keep trace of media changes */
     VolumeDevice->Vcb.MediaChangeCount = MediaChangeCount;