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  *                   Pierre Schweitzer (pierre@reactos.org)
   8  */
   9
  10 /* INCLUDES *****************************************************************/
  11
  12 #include "vfat.h"
  13
  14 #define NDEBUG
  15 #include <debug.h>
  16
  17 /* FUNCTIONS ****************************************************************/
  18
  19 /*
  20  * FUNCTION: Cleans up after a file has been closed.
  21  */
  22 static
  23 NTSTATUS
  24 VfatCleanupFile(
  25     PVFAT_IRP_CONTEXT IrpContext)
  26 {
  27     PVFATFCB pFcb;
  28     PVFATCCB pCcb;
  29     BOOLEAN IsVolume;
  30     PDEVICE_EXTENSION DeviceExt = IrpContext->DeviceExt;
  31     PFILE_OBJECT FileObject = IrpContext->FileObject;
  32
  33     DPRINT("VfatCleanupFile(DeviceExt %p, FileObject %p)\n",
  34            IrpContext->DeviceExt, FileObject);
  35
  36     /* FIXME: handle file/directory deletion here */
  37     pFcb = (PVFATFCB)FileObject->FsContext;
  38     if (!pFcb)
  39         return STATUS_SUCCESS;
  40
  41     IsVolume = BooleanFlagOn(pFcb->Flags, FCB_IS_VOLUME);
  42     if (IsVolume)
  43     {
  44         pFcb->OpenHandleCount--;
  45         DeviceExt->OpenHandleCount--;
  46
  47         if (pFcb->OpenHandleCount != 0)
  48         {
  49             IoRemoveShareAccess(FileObject, &pFcb->FCBShareAccess);
  50         }
  51     }
  52     else
  53     {
  54         ExAcquireResourceExclusiveLite(&pFcb->MainResource, TRUE);
  55         ExAcquireResourceExclusiveLite(&pFcb->PagingIoResource, TRUE);
  56
  57         pCcb = FileObject->FsContext2;
  58         if (BooleanFlagOn(pCcb->Flags, CCB_DELETE_ON_CLOSE))
  59         {
  60             pFcb->Flags |= FCB_DELETE_PENDING;
  61         }
  62
  63         /* Notify about the cleanup */
  64         FsRtlNotifyCleanup(IrpContext->DeviceExt->NotifySync,
  65                            &(IrpContext->DeviceExt->NotifyList),
  66                            FileObject->FsContext2);
  67
  68         pFcb->OpenHandleCount--;
  69         DeviceExt->OpenHandleCount--;
  70
  71         if (!vfatFCBIsDirectory(pFcb) &&
  72             FsRtlAreThereCurrentFileLocks(&pFcb->FileLock))
  73         {
  74             /* remove all locks this process have on this file */
  75             FsRtlFastUnlockAll(&pFcb->FileLock,
  76                                FileObject,
  77                                IoGetRequestorProcess(IrpContext->Irp),
  78                                NULL);
  79         }
  80
  81         if (BooleanFlagOn(pFcb->Flags, FCB_IS_DIRTY))
  82         {
  83             VfatUpdateEntry (DeviceExt, pFcb);
  84         }
  85
  86         if (BooleanFlagOn(pFcb->Flags, FCB_DELETE_PENDING) &&
  87             pFcb->OpenHandleCount == 0)
  88         {
  89             if (vfatFCBIsDirectory(pFcb) &&
  90                 !VfatIsDirectoryEmpty(DeviceExt, pFcb))
  91             {
  92                 pFcb->Flags &= ~FCB_DELETE_PENDING;
  93             }
  94             else
  95             {
  96                 PFILE_OBJECT tmpFileObject;
  97                 tmpFileObject = pFcb->FileObject;
  98                 if (tmpFileObject != NULL)
  99                 {
 100                     pFcb->FileObject = NULL;
 101                     CcUninitializeCacheMap(tmpFileObject, NULL, NULL);
 102                     ClearFlag(pFcb->Flags, FCB_CACHE_INITIALIZED);
 103                     ObDereferenceObject(tmpFileObject);
 104                 }
 105
 106                 pFcb->RFCB.ValidDataLength.QuadPart = 0;
 107                 pFcb->RFCB.FileSize.QuadPart = 0;
 108                 pFcb->RFCB.AllocationSize.QuadPart = 0;
 109             }
 110         }
 111
 112         /* Uninitialize the cache (should be done even if caching was never initialized) */
 113         CcUninitializeCacheMap(FileObject, &pFcb->RFCB.FileSize, NULL);
 114
 115         if (BooleanFlagOn(pFcb->Flags, FCB_DELETE_PENDING) &&
 116             pFcb->OpenHandleCount == 0)
 117         {
 118             VfatDelEntry(DeviceExt, pFcb, NULL);
 119
 120             vfatReportChange(DeviceExt,
 121                              pFcb,
 122                              (vfatFCBIsDirectory(pFcb) ?
 123                               FILE_NOTIFY_CHANGE_DIR_NAME : FILE_NOTIFY_CHANGE_FILE_NAME),
 124                              FILE_ACTION_REMOVED);
 125         }
 126
 127         if (pFcb->OpenHandleCount != 0)
 128         {
 129             IoRemoveShareAccess(FileObject, &pFcb->FCBShareAccess);
 130         }
 131 /* FIXME: causes FS corruption and breaks selfhosting/testbots and so on */
 132 #if 0
 133         /* If that's the last open handle we just closed, try to see whether
 134          * we can delay close operation
 135          */
 136         else if (!BooleanFlagOn(pFcb->Flags, FCB_DELETE_PENDING) && !BooleanFlagOn(pFcb->Flags, FCB_IS_PAGE_FILE) &&
 137                  !BooleanFlagOn(pFcb->Flags, FCB_IS_FAT) && !BooleanFlagOn(pFcb->Flags, FCB_IS_VOLUME))
 138         {
 139             /* This is only allowed if that's a directory with no open files
 140              * OR if it's a file with no section opened
 141              */
 142             if ((vfatFCBIsDirectory(pFcb) && IsListEmpty(&pFcb->ParentListHead)) ||
 143                 (!vfatFCBIsDirectory(pFcb) && FileObject->SectionObjectPointer->DataSectionObject == NULL &&
 144                  FileObject->SectionObjectPointer->ImageSectionObject == NULL))
 145             {
 146                 DPRINT("Delaying close of: %wZ\n", &pFcb->PathNameU);
 147                 SetFlag(pFcb->Flags, FCB_DELAYED_CLOSE);
 148             }
 149         }
 150 #endif
 151
 152         FileObject->Flags |= FO_CLEANUP_COMPLETE;
 153 #ifdef KDBG
 154         pFcb->Flags |= FCB_CLEANED_UP;
 155 #endif
 156
 157         ExReleaseResourceLite(&pFcb->PagingIoResource);
 158         ExReleaseResourceLite(&pFcb->MainResource);
 159     }
 160
 161 #ifdef ENABLE_SWAPOUT
 162     if (IsVolume && BooleanFlagOn(DeviceExt->Flags, VCB_DISMOUNT_PENDING))
 163     {
 164         VfatCheckForDismount(DeviceExt, FALSE);
 165     }
 166 #endif
 167
 168     return STATUS_SUCCESS;
 169 }
 170
 171 /*
 172  * FUNCTION: Cleans up after a file has been closed.
 173  */
 174 NTSTATUS
 175 VfatCleanup(
 176     PVFAT_IRP_CONTEXT IrpContext)
 177 {
 178     NTSTATUS Status;
 179
 180     DPRINT("VfatCleanup(DeviceObject %p, Irp %p)\n", IrpContext->DeviceObject, IrpContext->Irp);
 181
 182     if (IrpContext->DeviceObject == VfatGlobalData->DeviceObject)
 183     {
 184         IrpContext->Irp->IoStatus.Information = 0;
 185         return STATUS_SUCCESS;
 186     }
 187
 188     ExAcquireResourceExclusiveLite(&IrpContext->DeviceExt->DirResource, TRUE);
 189     Status = VfatCleanupFile(IrpContext);
 190     ExReleaseResourceLite(&IrpContext->DeviceExt->DirResource);
 191
 192     IrpContext->Irp->IoStatus.Information = 0;
 193     return Status;
 194 }
 195
 196 /* EOF */