reactos/drivers/filesystems/fastfat/cleanup.c

   1 /*
   2  * COPYRIGHT:        See COPYING in the top level directory
   3  * PROJECT:          ReactOS kernel
   4  * FILE:             drivers/fs/vfat/cleanup.c
   5  * PURPOSE:          VFAT Filesystem
   6  * PROGRAMMER:       Jason Filby (jasonfilby@yahoo.com)
   7  */
   8
   9 /* INCLUDES *****************************************************************/
  10
  11 #include "vfat.h"
  12
  13 #define NDEBUG
  14 #include <debug.h>
  15
  16 /* FUNCTIONS ****************************************************************/
  17
  18 /*
  19  * FUNCTION: Cleans up after a file has been closed.
  20  */
  21 static
  22 NTSTATUS
  23 VfatCleanupFile(
  24     PVFAT_IRP_CONTEXT IrpContext)
  25 {
  26     PVFATFCB pFcb;
  27     PDEVICE_EXTENSION DeviceExt = IrpContext->DeviceExt;
  28     PFILE_OBJECT FileObject = IrpContext->FileObject;
  29
  30     DPRINT("VfatCleanupFile(DeviceExt %p, FileObject %p)\n",
  31            IrpContext->DeviceExt, FileObject);
  32
  33     /* FIXME: handle file/directory deletion here */
  34     pFcb = (PVFATFCB)FileObject->FsContext;
  35     if (!pFcb)
  36         return STATUS_SUCCESS;
  37
  38     if (pFcb->Flags & FCB_IS_VOLUME)
  39     {
  40         pFcb->OpenHandleCount--;
  41
  42         if (pFcb->OpenHandleCount != 0)
  43         {
  44             IoRemoveShareAccess(FileObject, &pFcb->FCBShareAccess);
  45         }
  46     }
  47     else
  48     {
  49         if(!ExAcquireResourceExclusiveLite(&pFcb->MainResource,
  50                                            (BOOLEAN)(IrpContext->Flags & IRPCONTEXT_CANWAIT)))
  51         {
  52             return STATUS_PENDING;
  53         }
  54         if(!ExAcquireResourceExclusiveLite(&pFcb->PagingIoResource,
  55                                            (BOOLEAN)(IrpContext->Flags & IRPCONTEXT_CANWAIT)))
  56         {
  57             ExReleaseResourceLite(&pFcb->MainResource);
  58             return STATUS_PENDING;
  59         }
  60
  61         /* Notify about the cleanup */
  62         FsRtlNotifyCleanup(IrpContext->DeviceExt->NotifySync,
  63                            &(IrpContext->DeviceExt->NotifyList),
  64                            FileObject->FsContext2);
  65
  66         pFcb->OpenHandleCount--;
  67         DeviceExt->OpenHandleCount--;
  68
  69         if (!(*pFcb->Attributes & FILE_ATTRIBUTE_DIRECTORY) &&
  70             FsRtlAreThereCurrentFileLocks(&pFcb->FileLock))
  71         {
  72             /* remove all locks this process have on this file */
  73             FsRtlFastUnlockAll(&pFcb->FileLock,
  74                                FileObject,
  75                                IoGetRequestorProcess(IrpContext->Irp),
  76                                NULL);
  77         }
  78
  79         if (pFcb->Flags & FCB_IS_DIRTY)
  80         {
  81             VfatUpdateEntry (pFcb);
  82         }
  83
  84         if (pFcb->Flags & FCB_DELETE_PENDING &&
  85             pFcb->OpenHandleCount == 0)
  86         {
  87             PFILE_OBJECT tmpFileObject;
  88             tmpFileObject = pFcb->FileObject;
  89             if (tmpFileObject != NULL)
  90             {
  91                 pFcb->FileObject = NULL;
  92                 CcUninitializeCacheMap(tmpFileObject, NULL, NULL);
  93                 ObDereferenceObject(tmpFileObject);
  94             }
  95
  96             CcPurgeCacheSection(FileObject->SectionObjectPointer, NULL, 0, FALSE);
  97         }
  98
  99         /* Uninitialize the cache (should be done even if caching was never initialized) */
 100         CcUninitializeCacheMap(FileObject, &pFcb->RFCB.FileSize, NULL);
 101
 102         if (pFcb->OpenHandleCount != 0)
 103         {
 104             IoRemoveShareAccess(FileObject, &pFcb->FCBShareAccess);
 105         }
 106
 107         FileObject->Flags |= FO_CLEANUP_COMPLETE;
 108
 109         ExReleaseResourceLite(&pFcb->PagingIoResource);
 110         ExReleaseResourceLite(&pFcb->MainResource);
 111     }
 112
 113     if (DeviceExt->Flags & VCB_DISMOUNT_PENDING)
 114     {
 115         VfatCheckForDismount(DeviceExt, FALSE);
 116     }
 117
 118     return STATUS_SUCCESS;
 119 }
 120
 121 /*
 122  * FUNCTION: Cleans up after a file has been closed.
 123  */
 124 NTSTATUS
 125 VfatCleanup(
 126     PVFAT_IRP_CONTEXT IrpContext)
 127 {
 128     NTSTATUS Status;
 129
 130     DPRINT("VfatCleanup(DeviceObject %p, Irp %p)\n", IrpContext->DeviceObject, IrpContext->Irp);
 131
 132     if (IrpContext->DeviceObject == VfatGlobalData->DeviceObject)
 133     {
 134         Status = STATUS_SUCCESS;
 135         goto ByeBye;
 136     }
 137
 138     if (!ExAcquireResourceExclusiveLite(&IrpContext->DeviceExt->DirResource,
 139                                         (BOOLEAN)(IrpContext->Flags & IRPCONTEXT_CANWAIT)))
 140     {
 141         return VfatQueueRequest(IrpContext);
 142     }
 143
 144     Status = VfatCleanupFile(IrpContext);
 145
 146     ExReleaseResourceLite(&IrpContext->DeviceExt->DirResource);
 147
 148     if (Status == STATUS_PENDING)
 149     {
 150         return VfatQueueRequest(IrpContext);
 151     }
 152
 153 ByeBye:
 154     IrpContext->Irp->IoStatus.Status = Status;
 155     IrpContext->Irp->IoStatus.Information = 0;
 156
 157     IoCompleteRequest(IrpContext->Irp, IO_NO_INCREMENT);
 158     VfatFreeIrpContext(IrpContext);
 159     return Status;
 160 }
 161
 162 /* EOF */