reactos/drivers/net/afd/afd/select.c

   1 /* $Id$
   2  * COPYRIGHT:        See COPYING in the top level directory
   3  * PROJECT:          ReactOS kernel
   4  * FILE:             drivers/net/afd/afd/select.c
   5  * PURPOSE:          Ancillary functions driver
   6  * PROGRAMMER:       Art Yerkes (ayerkes@speakeasy.net)
   7  * UPDATE HISTORY:
   8  * 20040708 Created
   9  */
  10 #include "afd.h"
  11 #include "tdi_proto.h"
  12 #include "tdiconn.h"
  13 #include "debug.h"
  14
  15 VOID PrintEvents( ULONG Events ) {
  16     char *events_list[] = { "AFD_EVENT_RECEIVE",
  17                             "AFD_EVENT_OOB_RECEIVE",
  18                             "AFD_EVENT_SEND",
  19                             "AFD_EVENT_DISCONNECT",
  20                             "AFD_EVENT_ABORT",
  21                             "AFD_EVENT_CLOSE",
  22                             "AFD_EVENT_CONNECT",
  23                             "AFD_EVENT_ACCEPT",
  24                             "AFD_EVENT_CONNECT_FAIL",
  25                             "AFD_EVENT_QOS",
  26                             "AFD_EVENT_GROUP_QOS",
  27                             NULL };
  28     int i;
  29
  30     for( i = 0; events_list[i]; i++ )
  31         if( Events & (1 << i) ) DbgPrint("%s ", events_list[i] );
  32 }
  33
  34 VOID CopyBackStatus( PAFD_HANDLE HandleArray,
  35                      UINT HandleCount ) {
  36     UINT i;
  37
  38     for( i = 0; i < HandleCount; i++ ) {
  39         HandleArray[i].Events = HandleArray[i].Status;
  40         HandleArray[i].Status = 0;
  41     }
  42 }
  43
  44 VOID ZeroEvents( PAFD_HANDLE HandleArray,
  45                  UINT HandleCount ) {
  46     UINT i;
  47
  48     for( i = 0; i < HandleCount; i++ )
  49         HandleArray[i].Status = 0;
  50 }
  51
  52 VOID RemoveSelect( PAFD_ACTIVE_POLL Poll ) {
  53     AFD_DbgPrint(MID_TRACE,("Called\n"));
  54
  55     RemoveEntryList( &Poll->ListEntry );
  56     KeCancelTimer( &Poll->Timer );
  57
  58     ExFreePool( Poll );
  59
  60     AFD_DbgPrint(MID_TRACE,("Done\n"));
  61 }
  62
  63 VOID SignalSocket( PAFD_ACTIVE_POLL Poll, PAFD_POLL_INFO PollReq,
  64                    NTSTATUS Status ) {
  65     int i;
  66     PIRP Irp = Poll->Irp;
  67     AFD_DbgPrint(MID_TRACE,("Called (Status %x)\n", Status));
  68     KeCancelTimer( &Poll->Timer );
  69     Poll->Irp->IoStatus.Status = Status;
  70     Poll->Irp->IoStatus.Information =
  71         FIELD_OFFSET(AFD_POLL_INFO, Handles) + sizeof(AFD_HANDLE) * PollReq->HandleCount;
  72     CopyBackStatus( PollReq->Handles,
  73                     PollReq->HandleCount );
  74     for( i = 0; i < PollReq->HandleCount; i++ ) {
  75         AFD_DbgPrint
  76             (MAX_TRACE,
  77              ("Handle(%x): Got %x,%x\n",
  78               PollReq->Handles[i].Handle,
  79               PollReq->Handles[i].Events,
  80               PollReq->Handles[i].Status));
  81     }
  82     UnlockHandles( AFD_HANDLES(PollReq), PollReq->HandleCount );
  83     AFD_DbgPrint(MID_TRACE,("Completing\n"));
  84     IoCompleteRequest( Irp, IO_NETWORK_INCREMENT );
  85     RemoveEntryList( &Poll->ListEntry );
  86     RemoveSelect( Poll );
  87     AFD_DbgPrint(MID_TRACE,("Done\n"));
  88 }
  89
  90 VOID SelectTimeout( PKDPC Dpc,
  91                     PVOID DeferredContext,
  92                     PVOID SystemArgument1,
  93                     PVOID SystemArgument2 ) {
  94     PAFD_ACTIVE_POLL Poll = DeferredContext;
  95     PAFD_POLL_INFO PollReq;
  96     PIRP Irp;
  97     KIRQL OldIrql;
  98     PAFD_DEVICE_EXTENSION DeviceExt;
  99
 100     AFD_DbgPrint(MID_TRACE,("Called\n"));
 101
 102     Irp = Poll->Irp;
 103     DeviceExt = Poll->DeviceExt;
 104     PollReq = Irp->AssociatedIrp.SystemBuffer;
 105
 106     ZeroEvents( PollReq->Handles, PollReq->HandleCount );
 107
 108     KeAcquireSpinLock( &DeviceExt->Lock, &OldIrql );
 109     SignalSocket( Poll, PollReq, STATUS_TIMEOUT );
 110     KeReleaseSpinLock( &DeviceExt->Lock, OldIrql );
 111
 112     AFD_DbgPrint(MID_TRACE,("Timeout\n"));
 113 }
 114
 115 VOID KillSelectsForFCB( PAFD_DEVICE_EXTENSION DeviceExt,
 116                         PFILE_OBJECT FileObject,
 117                         BOOLEAN OnlyExclusive ) {
 118     KIRQL OldIrql;
 119     PLIST_ENTRY ListEntry;
 120     PAFD_ACTIVE_POLL Poll;
 121     PIRP Irp;
 122     PAFD_POLL_INFO PollReq;
 123     PAFD_HANDLE HandleArray;
 124     int i;
 125
 126     AFD_DbgPrint(MID_TRACE,("Killing selects that refer to %x\n", FileObject));
 127
 128     KeAcquireSpinLock( &DeviceExt->Lock, &OldIrql );
 129
 130     ListEntry = DeviceExt->Polls.Flink;
 131     while ( ListEntry != &DeviceExt->Polls ) {
 132         Poll = CONTAINING_RECORD(ListEntry, AFD_ACTIVE_POLL, ListEntry);
 133         ListEntry = ListEntry->Flink;
 134         Irp = Poll->Irp;
 135         PollReq = Irp->AssociatedIrp.SystemBuffer;
 136         HandleArray = AFD_HANDLES(PollReq);
 137
 138         for( i = 0; i < PollReq->HandleCount; i++ ) {
 139             AFD_DbgPrint(MAX_TRACE,("Req: %x, This %x\n",
 140                                     HandleArray[i].Handle, FileObject));
 141             if( (PVOID)HandleArray[i].Handle == FileObject &&
 142                 (!OnlyExclusive || (OnlyExclusive && Poll->Exclusive)) ) {
 143                 ZeroEvents( PollReq->Handles, PollReq->HandleCount );
 144                 SignalSocket( Poll, PollReq, STATUS_SUCCESS );
 145             }
 146         }
 147     }
 148
 149     KeReleaseSpinLock( &DeviceExt->Lock, OldIrql );
 150
 151     AFD_DbgPrint(MID_TRACE,("Done\n"));
 152 }
 153
 154 NTSTATUS STDCALL
 155 AfdSelect( PDEVICE_OBJECT DeviceObject, PIRP Irp,
 156            PIO_STACK_LOCATION IrpSp ) {
 157     NTSTATUS Status = STATUS_NO_MEMORY;
 158     PAFD_FCB FCB;
 159     PFILE_OBJECT FileObject;
 160     PAFD_POLL_INFO PollReq = Irp->AssociatedIrp.SystemBuffer;
 161     PAFD_DEVICE_EXTENSION DeviceExt = DeviceObject->DeviceExtension;
 162     PAFD_ACTIVE_POLL Poll = NULL;
 163     UINT CopySize = IrpSp->Parameters.DeviceIoControl.InputBufferLength;
 164     UINT AllocSize =
 165         CopySize + sizeof(AFD_ACTIVE_POLL) - sizeof(AFD_POLL_INFO);
 166     KIRQL OldIrql;
 167     UINT i, Signalled = 0;
 168     ULONG Exclusive = PollReq->Exclusive;
 169
 170     AFD_DbgPrint(MID_TRACE,("Called (HandleCount %d Timeout %d)\n",
 171                             PollReq->HandleCount,
 172                             (INT)(PollReq->Timeout.QuadPart)));
 173
 174     SET_AFD_HANDLES(PollReq,
 175                     LockHandles( PollReq->Handles, PollReq->HandleCount ));
 176
 177     if( !AFD_HANDLES(PollReq) ) {
 178         Irp->IoStatus.Status = STATUS_NO_MEMORY;
 179         Irp->IoStatus.Information = 0;
 180         IoCompleteRequest( Irp, IO_NETWORK_INCREMENT );
 181         return Irp->IoStatus.Status;
 182     }
 183
 184     if( Exclusive ) {
 185         for( i = 0; i < PollReq->HandleCount; i++ ) {
 186             if( !AFD_HANDLES(PollReq)[i].Handle ) continue;
 187
 188             KillSelectsForFCB( DeviceExt,
 189                                (PFILE_OBJECT)AFD_HANDLES(PollReq)[i].Handle,
 190                                TRUE );
 191         }
 192     }
 193
 194     ZeroEvents( PollReq->Handles,
 195                 PollReq->HandleCount );
 196
 197     Poll = ExAllocatePool( NonPagedPool, AllocSize );
 198
 199     if( Poll ) {
 200         Poll->Irp = Irp;
 201         Poll->DeviceExt = DeviceExt;
 202         Poll->Exclusive = Exclusive;
 203
 204         KeInitializeTimerEx( &Poll->Timer, NotificationTimer );
 205         KeSetTimer( &Poll->Timer, PollReq->Timeout, &Poll->TimeoutDpc );
 206
 207         KeInitializeDpc( (PRKDPC)&Poll->TimeoutDpc,
 208                          (PKDEFERRED_ROUTINE)SelectTimeout,
 209                          Poll );
 210
 211         KeAcquireSpinLock( &DeviceExt->Lock, &OldIrql );
 212         InsertTailList( &DeviceExt->Polls, &Poll->ListEntry );
 213
 214         for( i = 0; i < PollReq->HandleCount; i++ ) {
 215             if( !AFD_HANDLES(PollReq)[i].Handle ) continue;
 216
 217             FileObject = (PFILE_OBJECT)AFD_HANDLES(PollReq)[i].Handle;
 218             FCB = FileObject->FsContext;
 219
 220             if( (FCB->PollState & AFD_EVENT_CLOSE) ||
 221                 (PollReq->Handles[i].Status & AFD_EVENT_CLOSE) ) {
 222                 AFD_HANDLES(PollReq)[i].Handle = 0;
 223                 PollReq->Handles[i].Events = 0;
 224                 PollReq->Handles[i].Status = AFD_EVENT_CLOSE;
 225                 Signalled++;
 226             } else {
 227 #ifdef DBG
 228                 DbgPrint("AFD: Select Events: ");
 229                 PrintEvents( PollReq->Handles[i].Events );
 230                 DbgPrint("\n");
 231 #endif
 232
 233                 PollReq->Handles[i].Status =
 234                     PollReq->Handles[i].Events & FCB->PollState;
 235                 if( PollReq->Handles[i].Status ) {
 236                     AFD_DbgPrint(MID_TRACE,("Signalling %x with %x\n",
 237                                             FCB, FCB->PollState));
 238                     Signalled++;
 239                 }
 240             }
 241         }
 242
 243         if( Signalled ) {
 244             Status = STATUS_SUCCESS;
 245             Irp->IoStatus.Status = Status;
 246             SignalSocket( Poll, PollReq, Status );
 247         } else {
 248             Status = STATUS_PENDING;
 249             IoMarkIrpPending( Irp );
 250         }
 251
 252         KeReleaseSpinLock( &DeviceExt->Lock, OldIrql );
 253     } else Status = STATUS_NO_MEMORY;
 254
 255     AFD_DbgPrint(MID_TRACE,("Returning %x\n", Status));
 256
 257     return Status;
 258 }
 259
 260 NTSTATUS STDCALL
 261 AfdEventSelect( PDEVICE_OBJECT DeviceObject, PIRP Irp,
 262                 PIO_STACK_LOCATION IrpSp ) {
 263     PFILE_OBJECT FileObject = IrpSp->FileObject;
 264     NTSTATUS Status = STATUS_NO_MEMORY;
 265     PAFD_EVENT_SELECT_INFO EventSelectInfo =
 266         (PAFD_EVENT_SELECT_INFO)LockRequest( Irp, IrpSp );
 267     PAFD_FCB FCB = FileObject->FsContext;
 268
 269     AFD_DbgPrint(MID_TRACE,("Called (Event %x Triggers %x)\n",
 270                             EventSelectInfo->EventObject,
 271                             EventSelectInfo->Events));
 272
 273     if( !SocketAcquireStateLock( FCB ) ) {
 274         UnlockRequest( Irp, IrpSp );
 275         return LostSocket( Irp, FALSE );
 276     }
 277
 278     FCB->EventSelectTriggers = FCB->EventsFired = 0;
 279     if( FCB->EventSelect ) ObDereferenceObject( FCB->EventSelect );
 280     FCB->EventSelect = NULL;
 281
 282     if( EventSelectInfo->EventObject && EventSelectInfo->Events ) {
 283         Status = ObReferenceObjectByHandle( (PVOID)EventSelectInfo->
 284                                             EventObject,
 285                                             FILE_ALL_ACCESS,
 286                                             NULL,
 287                                             KernelMode,
 288                                             (PVOID *)&FCB->EventSelect,
 289                                             NULL );
 290
 291         if( !NT_SUCCESS(Status) )
 292             FCB->EventSelect = NULL;
 293         else
 294             FCB->EventSelectTriggers = EventSelectInfo->Events;
 295     } else /* Work done, cancelling select */
 296         Status = STATUS_SUCCESS;
 297
 298     AFD_DbgPrint(MID_TRACE,("Returning %x\n", Status));
 299
 300     return UnlockAndMaybeComplete( FCB, STATUS_SUCCESS, Irp,
 301                                    0, NULL, TRUE );
 302 }
 303
 304 NTSTATUS STDCALL
 305 AfdEnumEvents( PDEVICE_OBJECT DeviceObject, PIRP Irp,
 306                PIO_STACK_LOCATION IrpSp ) {
 307     PFILE_OBJECT FileObject = IrpSp->FileObject;
 308     PAFD_ENUM_NETWORK_EVENTS_INFO EnumReq =
 309         (PAFD_ENUM_NETWORK_EVENTS_INFO)LockRequest( Irp, IrpSp );
 310     PAFD_FCB FCB = FileObject->FsContext;
 311
 312     AFD_DbgPrint(MID_TRACE,("Called (FCB %x)\n", FCB));
 313
 314     if( !SocketAcquireStateLock( FCB ) ) {
 315         UnlockRequest( Irp, IrpSp );
 316         return LostSocket( Irp, FALSE );
 317     }
 318
 319     EnumReq->PollEvents = FCB->PollState;
 320     RtlZeroMemory( EnumReq->EventStatus, sizeof(EnumReq->EventStatus) );
 321
 322     return UnlockAndMaybeComplete( FCB, STATUS_SUCCESS, Irp,
 323                                    0, NULL, TRUE );
 324 }
 325
 326 /* * * NOTE ALWAYS CALLED AT DISPATCH_LEVEL * * */
 327 BOOLEAN UpdatePollWithFCB( PAFD_ACTIVE_POLL Poll, PFILE_OBJECT FileObject ) {
 328     UINT i;
 329     PAFD_FCB FCB;
 330     UINT Signalled = 0;
 331     PAFD_POLL_INFO PollReq = Poll->Irp->AssociatedIrp.SystemBuffer;
 332
 333     ASSERT( KeGetCurrentIrql() == DISPATCH_LEVEL );
 334
 335     for( i = 0; i < PollReq->HandleCount; i++ ) {
 336         if( !AFD_HANDLES(PollReq)[i].Handle ) continue;
 337
 338         FileObject = (PFILE_OBJECT)AFD_HANDLES(PollReq)[i].Handle;
 339         FCB = FileObject->FsContext;
 340
 341         if( (FCB->PollState & AFD_EVENT_CLOSE) ||
 342             (PollReq->Handles[i].Status & AFD_EVENT_CLOSE) ) {
 343             AFD_HANDLES(PollReq)[i].Handle = 0;
 344             PollReq->Handles[i].Events = 0;
 345             PollReq->Handles[i].Status = AFD_EVENT_CLOSE;
 346             Signalled++;
 347         } else {
 348             PollReq->Handles[i].Status =
 349                 PollReq->Handles[i].Events & FCB->PollState;
 350             if( PollReq->Handles[i].Status ) {
 351                 AFD_DbgPrint(MID_TRACE,("Signalling %x with %x\n",
 352                                         FCB, FCB->PollState));
 353                 Signalled++;
 354             }
 355         }
 356     }
 357
 358     return Signalled ? 1 : 0;
 359 }
 360
 361 VOID PollReeval( PAFD_DEVICE_EXTENSION DeviceExt, PFILE_OBJECT FileObject ) {
 362     PAFD_ACTIVE_POLL Poll = NULL;
 363     PLIST_ENTRY ThePollEnt = NULL;
 364     PAFD_FCB FCB;
 365     KIRQL OldIrql;
 366     PAFD_POLL_INFO PollReq;
 367     PKEVENT EventSelect = NULL;
 368
 369     AFD_DbgPrint(MID_TRACE,("Called: DeviceExt %x FileObject %x\n",
 370                             DeviceExt, FileObject));
 371
 372     KeAcquireSpinLock( &DeviceExt->Lock, &OldIrql );
 373
 374     /* Take care of any event select signalling */
 375     FCB = (PAFD_FCB)FileObject->FsContext;
 376
 377     /* Not sure if i can do this at DISPATCH_LEVEL ... try it at passive */
 378     AFD_DbgPrint(MID_TRACE,("Current State: %x, Events Fired: %x, "
 379                             "Select Triggers %x\n",
 380                             FCB->PollState, FCB->EventsFired,
 381                             FCB->EventSelectTriggers));
 382     if( FCB->PollState & ~FCB->EventsFired & FCB->EventSelectTriggers ) {
 383         FCB->EventsFired |= FCB->PollState;
 384         EventSelect = FCB->EventSelect;
 385     }
 386
 387     if( !FCB ) {
 388         KeReleaseSpinLock( &DeviceExt->Lock, OldIrql );
 389         return;
 390     }
 391
 392     /* Now signal normal select irps */
 393     ThePollEnt = DeviceExt->Polls.Flink;
 394
 395     while( ThePollEnt != &DeviceExt->Polls ) {
 396         Poll = CONTAINING_RECORD( ThePollEnt, AFD_ACTIVE_POLL, ListEntry );
 397         PollReq = Poll->Irp->AssociatedIrp.SystemBuffer;
 398         AFD_DbgPrint(MID_TRACE,("Checking poll %x\n", Poll));
 399
 400         if( UpdatePollWithFCB( Poll, FileObject ) ) {
 401             ThePollEnt = ThePollEnt->Flink;
 402             AFD_DbgPrint(MID_TRACE,("Signalling socket\n"));
 403             SignalSocket( Poll, PollReq, STATUS_SUCCESS );
 404         } else
 405             ThePollEnt = ThePollEnt->Flink;
 406     }
 407
 408     KeReleaseSpinLock( &DeviceExt->Lock, OldIrql );
 409
 410     AFD_DbgPrint(MID_TRACE,("Setting event %x\n", EventSelect));
 411     if( EventSelect ) KeSetEvent( EventSelect, IO_NETWORK_INCREMENT, FALSE );
 412
 413     AFD_DbgPrint(MID_TRACE,("Leaving\n"));
 414 }