reactos/drivers/filesystems/ext2_new/src/shutdown.c

   1 /*
   2  * COPYRIGHT:        See COPYRIGHT.TXT
   3  * PROJECT:          Ext2 File System Driver for WinNT/2K/XP
   4  * FILE:             shutdown.c
   5  * PROGRAMMER:       Matt Wu <mattwu@163.com>
   6  * HOMEPAGE:         http://www.ext2fsd.com
   7  * UPDATE HISTORY:
   8  */
   9
  10 /* INCLUDES *****************************************************************/
  11
  12 #include "ext2fs.h"
  13
  14 /* GLOBALS ***************************************************************/
  15
  16 extern PEXT2_GLOBAL Ext2Global;
  17
  18 /* DEFINITIONS *************************************************************/
  19
  20 #ifdef ALLOC_PRAGMA
  21 #pragma alloc_text(PAGE, Ext2ShutDown)
  22 #endif
  23
  24 NTSTATUS
  25 Ext2ShutDown (IN PEXT2_IRP_CONTEXT IrpContext)
  26 {
  27     NTSTATUS                Status;
  28
  29     PIRP                    Irp;
  30
  31     PEXT2_VCB               Vcb;
  32     PLIST_ENTRY             ListEntry;
  33
  34     BOOLEAN                 GlobalResourceAcquired = FALSE;
  35
  36     _SEH2_TRY {
  37
  38         Status = STATUS_SUCCESS;
  39
  40         ASSERT(IrpContext);
  41         ASSERT((IrpContext->Identifier.Type == EXT2ICX) &&
  42                (IrpContext->Identifier.Size == sizeof(EXT2_IRP_CONTEXT)));
  43
  44         Irp = IrpContext->Irp;
  45
  46         if (!ExAcquireResourceExclusiveLite(
  47                     &Ext2Global->Resource,
  48                     IsFlagOn(IrpContext->Flags, IRP_CONTEXT_FLAG_WAIT) )) {
  49             Status = STATUS_PENDING;
  50             _SEH2_LEAVE;
  51         }
  52
  53         GlobalResourceAcquired = TRUE;
  54
  55         for (ListEntry = Ext2Global->VcbList.Flink;
  56                 ListEntry != &(Ext2Global->VcbList);
  57                 ListEntry = ListEntry->Flink ) {
  58
  59             Vcb = CONTAINING_RECORD(ListEntry, EXT2_VCB, Next);
  60
  61             if (ExAcquireResourceExclusiveLite(
  62                         &Vcb->MainResource,
  63                         TRUE )) {
  64
  65                 if (IsMounted(Vcb)) {
  66
  67                     /* update mount count */
  68                     Vcb->SuperBlock->s_mnt_count++;
  69                     if (Vcb->SuperBlock->s_mnt_count >
  70                             Vcb->SuperBlock->s_max_mnt_count ) {
  71                         Vcb->SuperBlock->s_mnt_count =
  72                             Vcb->SuperBlock->s_max_mnt_count;
  73                     }
  74                     Ext2SaveSuper(IrpContext, Vcb);
  75
  76                     /* flush dirty cache for all files */
  77                     Status = Ext2FlushFiles(IrpContext, Vcb, TRUE);
  78                     if (!NT_SUCCESS(Status)) {
  79                         DbgBreak();
  80                     }
  81
  82                     /* flush volume stream's cache to disk */
  83                     Status = Ext2FlushVolume(IrpContext, Vcb, TRUE);
  84
  85                     if (!NT_SUCCESS(Status) && Status != STATUS_MEDIA_WRITE_PROTECTED) {
  86                         DbgBreak();
  87                     }
  88
  89                     /* send shutdown request to underlying disk */
  90                     Ext2DiskShutDown(Vcb);
  91                 }
  92
  93                 ExReleaseResourceLite(&Vcb->MainResource);
  94             }
  95         }
  96
  97         /*
  98                 IoUnregisterFileSystem(Ext2Global->DiskdevObject);
  99                 IoUnregisterFileSystem(Ext2Global->CdromdevObject);
 100         */
 101
 102     } _SEH2_FINALLY {
 103
 104         if (GlobalResourceAcquired) {
 105             ExReleaseResourceLite(&Ext2Global->Resource);
 106         }
 107
 108         if (!IrpContext->ExceptionInProgress) {
 109             if (Status == STATUS_PENDING) {
 110                 Ext2QueueRequest(IrpContext);
 111             } else {
 112                 Ext2CompleteIrpContext(IrpContext, Status);
 113             }
 114         }
 115     } _SEH2_END;
 116
 117     return Status;
 118 }