drivers/filesystems/npfs/create.c

   1 /*
   2  * PROJECT:     ReactOS Named Pipe FileSystem
   3  * LICENSE:     BSD - See COPYING.ARM in the top level directory
   4  * FILE:        drivers/filesystems/npfs/create.c
   5  * PURPOSE:     Pipes Creation
   6  * PROGRAMMERS: ReactOS Portable Systems Group
   7  */
   8
   9 /* INCLUDES *******************************************************************/
  10
  11 #include "npfs.h"
  12
  13 // File ID number for NPFS bugchecking support
  14 #define NPFS_BUGCHECK_FILE_ID   (NPFS_BUGCHECK_CREATE)
  15
  16 /* FUNCTIONS ******************************************************************/
  17
  18 VOID
  19 NTAPI
  20 NpCheckForNotify(IN PNP_DCB Dcb,
  21                  IN BOOLEAN SecondList,
  22                  IN PLIST_ENTRY List)
  23 {
  24     PLIST_ENTRY NextEntry, ListHead;
  25     PIRP Irp;
  26     ULONG i;
  27     PAGED_CODE();
  28
  29     ListHead = &Dcb->NotifyList;
  30     for (i = 0; i < 2; i++)
  31     {
  32         ASSERT(IsListEmpty(ListHead));
  33         while (!IsListEmpty(ListHead))
  34         {
  35             NextEntry = RemoveHeadList(ListHead);
  36
  37             Irp = CONTAINING_RECORD(NextEntry, IRP, Tail.Overlay.ListEntry);
  38
  39             if (IoSetCancelRoutine(Irp, NULL))
  40             {
  41                 Irp->IoStatus.Status = STATUS_SUCCESS;
  42                 InsertTailList(List, NextEntry);
  43             }
  44             else
  45             {
  46                 InitializeListHead(NextEntry);
  47             }
  48         }
  49
  50         if (!SecondList) break;
  51         ListHead = &Dcb->NotifyList2;
  52     }
  53 }
  54
  55 IO_STATUS_BLOCK
  56 NTAPI
  57 NpOpenNamedPipeFileSystem(IN PFILE_OBJECT FileObject,
  58                           IN ACCESS_MASK DesiredAccess)
  59 {
  60     IO_STATUS_BLOCK Status;
  61     PAGED_CODE();
  62     TRACE("Entered\n");
  63
  64     NpSetFileObject(FileObject, NpVcb, NULL, FALSE);
  65     ++NpVcb->ReferenceCount;
  66
  67     Status.Information = FILE_OPENED;
  68     Status.Status = STATUS_SUCCESS;
  69     TRACE("Leaving, Status.Status = %lx\n", Status.Status);
  70     return Status;
  71 }
  72
  73 IO_STATUS_BLOCK
  74 NTAPI
  75 NpOpenNamedPipeRootDirectory(IN PNP_DCB Dcb,
  76                              IN PFILE_OBJECT FileObject,
  77                              IN ACCESS_MASK DesiredAccess,
  78                              IN PLIST_ENTRY List)
  79 {
  80     IO_STATUS_BLOCK IoStatus;
  81     PNP_ROOT_DCB_FCB Ccb;
  82     PAGED_CODE();
  83     TRACE("Entered\n");
  84
  85     IoStatus.Status = NpCreateRootDcbCcb(&Ccb);
  86     if (NT_SUCCESS(IoStatus.Status))
  87     {
  88         NpSetFileObject(FileObject, Dcb, Ccb, FALSE);
  89         ++Dcb->CurrentInstances;
  90
  91         IoStatus.Information = FILE_OPENED;
  92         IoStatus.Status = STATUS_SUCCESS;
  93     }
  94     else
  95     {
  96         IoStatus.Information = 0;
  97     }
  98
  99     TRACE("Leaving, IoStatus.Status = %lx\n", IoStatus.Status);
 100     return IoStatus;
 101 }
 102
 103 IO_STATUS_BLOCK
 104 NTAPI
 105 NpCreateClientEnd(IN PNP_FCB Fcb,
 106                   IN PFILE_OBJECT FileObject,
 107                   IN ACCESS_MASK DesiredAccess,
 108                   IN PSECURITY_QUALITY_OF_SERVICE SecurityQos,
 109                   IN PACCESS_STATE AccessState,
 110                   IN KPROCESSOR_MODE PreviousMode,
 111                   IN PETHREAD Thread,
 112                   IN PLIST_ENTRY List)
 113 {
 114     PSECURITY_SUBJECT_CONTEXT SubjectSecurityContext;
 115     BOOLEAN AccessGranted;
 116     ACCESS_MASK GrantedAccess;
 117     PPRIVILEGE_SET Privileges;
 118     UNICODE_STRING ObjectTypeName;
 119     IO_STATUS_BLOCK IoStatus;
 120     USHORT NamedPipeConfiguration;
 121     PLIST_ENTRY NextEntry, ListHead;
 122     PNP_CCB Ccb = NULL;
 123     TRACE("Entered\n");
 124
 125     IoStatus.Information = 0;
 126     Privileges = NULL;
 127
 128     NamedPipeConfiguration = Fcb->NamedPipeConfiguration;
 129
 130     SubjectSecurityContext = &AccessState->SubjectSecurityContext;
 131     SeLockSubjectContext(SubjectSecurityContext);
 132
 133     AccessGranted = SeAccessCheck(Fcb->SecurityDescriptor,
 134                                   SubjectSecurityContext,
 135                                   TRUE,
 136                                   DesiredAccess & ~4,
 137                                   0,
 138                                   &Privileges,
 139                                   IoGetFileObjectGenericMapping(),
 140                                   PreviousMode,
 141                                   &GrantedAccess,
 142                                   &IoStatus.Status);
 143
 144     if (Privileges)
 145     {
 146         SeAppendPrivileges(AccessState, Privileges);
 147         SeFreePrivileges(Privileges);
 148     }
 149
 150     if (AccessGranted)
 151     {
 152         AccessState->PreviouslyGrantedAccess |= GrantedAccess;
 153         AccessState->RemainingDesiredAccess &= ~(GrantedAccess | MAXIMUM_ALLOWED);
 154     }
 155
 156     ObjectTypeName.Buffer = L"NamedPipe";
 157     ObjectTypeName.Length = 18;
 158     SeOpenObjectAuditAlarm(&ObjectTypeName,
 159                            NULL,
 160                            &FileObject->FileName,
 161                            Fcb->SecurityDescriptor,
 162                            AccessState,
 163                            FALSE,
 164                            AccessGranted,
 165                            PreviousMode,
 166                            &AccessState->GenerateOnClose);
 167     SeUnlockSubjectContext(SubjectSecurityContext);
 168     if (!AccessGranted) return IoStatus;
 169
 170     if (((GrantedAccess & FILE_READ_DATA) && (NamedPipeConfiguration == FILE_PIPE_INBOUND)) ||
 171         ((GrantedAccess & FILE_WRITE_DATA) && (NamedPipeConfiguration == FILE_PIPE_OUTBOUND)))
 172     {
 173         IoStatus.Status = STATUS_ACCESS_DENIED;
 174         TRACE("Leaving, IoStatus.Status = %lx\n", IoStatus.Status);
 175         return IoStatus;
 176     }
 177
 178     if (!(GrantedAccess & (FILE_READ_DATA | FILE_WRITE_DATA))) SecurityQos = NULL;
 179
 180     ListHead = &Fcb->CcbList;
 181     NextEntry = ListHead->Flink;
 182     while (NextEntry != ListHead)
 183     {
 184         Ccb = CONTAINING_RECORD(NextEntry, NP_CCB, CcbEntry);
 185         if (Ccb->NamedPipeState == FILE_PIPE_LISTENING_STATE) break;
 186
 187         NextEntry = NextEntry->Flink;
 188     }
 189
 190     if (NextEntry == ListHead)
 191     {
 192         IoStatus.Status = STATUS_PIPE_NOT_AVAILABLE;
 193         TRACE("Leaving, IoStatus.Status = %lx\n", IoStatus.Status);
 194         return IoStatus;
 195     }
 196
 197     IoStatus.Status = NpInitializeSecurity(Ccb, SecurityQos, Thread);
 198     if (!NT_SUCCESS(IoStatus.Status)) return IoStatus;
 199
 200     IoStatus.Status = NpSetConnectedPipeState(Ccb, FileObject, List);
 201     if (!NT_SUCCESS(IoStatus.Status))
 202     {
 203         NpUninitializeSecurity(Ccb);
 204         TRACE("Leaving, IoStatus.Status = %lx\n", IoStatus.Status);
 205         return IoStatus;
 206     }
 207
 208     Ccb->ClientSession = NULL;
 209     Ccb->Process = IoThreadToProcess(Thread);
 210
 211     IoStatus.Information = FILE_OPENED;
 212     IoStatus.Status = STATUS_SUCCESS;
 213     TRACE("Leaving, IoStatus.Status = %lx\n", IoStatus.Status);
 214     return IoStatus;
 215 }
 216
 217 NTSTATUS
 218 NTAPI
 219 NpTranslateAlias(
 220     PUNICODE_STRING PipeName)
 221 {
 222     WCHAR UpcaseBuffer[MAX_INDEXED_LENGTH + 1];
 223     UNICODE_STRING UpcaseString;
 224     ULONG Length;
 225     PNPFS_ALIAS CurrentAlias;
 226     NTSTATUS Status;
 227     BOOLEAN BufferAllocated, BackSlash;
 228     LONG Result;
 229     PAGED_CODE();
 230
 231     /* Get the pipe name length and check for empty string */
 232     Length = PipeName->Length;
 233     if (Length == 0)
 234     {
 235         return STATUS_SUCCESS;
 236     }
 237
 238     /* Check if the name starts with a path separator */
 239     BackSlash = (PipeName->Buffer[0] == OBJ_NAME_PATH_SEPARATOR);
 240     if (BackSlash)
 241     {
 242         /* We are only interested in the part after the backslash */
 243         Length -= sizeof(WCHAR);
 244     }
 245
 246     /* Check if the length is within our indexed list bounds */
 247     if ((Length >= MIN_INDEXED_LENGTH * sizeof(WCHAR)) &&
 248         (Length <= MAX_INDEXED_LENGTH * sizeof(WCHAR)))
 249     {
 250         /* Length is within bounds, use the list by length */
 251         CurrentAlias = NpAliasListByLength[(Length / sizeof(WCHAR)) - MIN_INDEXED_LENGTH];
 252     }
 253     else
 254     {
 255         /* We use the generic list, search for an entry of the right size */
 256         CurrentAlias = NpAliasList;
 257         while ((CurrentAlias != NULL) && (CurrentAlias->Name.Length != Length))
 258         {
 259             /* Check if we went past the desired length */
 260             if (CurrentAlias->Name.Length > Length)
 261             {
 262                 /* In this case there is no matching alias, return success */
 263                 return STATUS_SUCCESS;
 264             }
 265
 266             /* Go to the next alias in the list */
 267             CurrentAlias = CurrentAlias->Next;
 268         }
 269     }
 270
 271     /* Did we find any alias? */
 272     if (CurrentAlias == NULL)
 273     {
 274         /* Nothing found, no matching alias */
 275         return STATUS_SUCCESS;
 276     }
 277
 278     /* Check whether we can use our stack buffer */
 279     if (Length <= MAX_INDEXED_LENGTH * sizeof(WCHAR))
 280     {
 281         /* Initialize the upcased string */
 282         UpcaseString.Buffer = UpcaseBuffer;
 283         UpcaseString.MaximumLength = sizeof(UpcaseBuffer);
 284
 285         /* Upcase the pipe name */
 286         Status = RtlUpcaseUnicodeString(&UpcaseString, PipeName, FALSE);
 287         NT_ASSERT(NT_SUCCESS(Status));
 288         BufferAllocated = FALSE;
 289     }
 290     else
 291     {
 292         /* Upcase the pipe name, allocate the string buffer */
 293         Status = RtlUpcaseUnicodeString(&UpcaseString, PipeName, TRUE);
 294         if (!NT_SUCCESS(Status))
 295         {
 296             return Status;
 297         }
 298
 299         BufferAllocated = TRUE;
 300     }
 301
 302     /* Did the original name start with a backslash? */
 303     if (BackSlash)
 304     {
 305         /* Skip it for the comparison */
 306         UpcaseString.Buffer++;
 307         UpcaseString.Length -= sizeof(WCHAR);
 308     }
 309
 310     /* Make sure the length matches the "raw" length */
 311     NT_ASSERT(UpcaseString.Length == Length);
 312     NT_ASSERT(CurrentAlias->Name.Length == Length);
 313
 314     /* Loop while we have aliases */
 315     do
 316     {
 317         /* Compare the names and check if they match */
 318         Result = NpCompareAliasNames(&UpcaseString, &CurrentAlias->Name);
 319         if (Result == 0)
 320         {
 321             /* The names match, use the target name */
 322             *PipeName = *CurrentAlias->TargetName;
 323
 324             /* Did the original name start with a backslash? */
 325             if (!BackSlash)
 326             {
 327                 /* It didn't, so skip it in the target name as well */
 328                 PipeName->Buffer++;
 329                 PipeName->Length -= sizeof(WCHAR);
 330             }
 331             break;
 332         }
 333
 334         /* Check if we went past all string candidates */
 335         if (Result < 0)
 336         {
 337             /* Nothing found, we're done */
 338             break;
 339         }
 340
 341         /* Go to the next alias */
 342         CurrentAlias = CurrentAlias->Next;
 343
 344         /* Keep looping while we have aliases of the right length */
 345     } while ((CurrentAlias != NULL) && (CurrentAlias->Name.Length == Length));
 346
 347     /* Did we allocate a buffer? */
 348     if (BufferAllocated)
 349     {
 350         /* Free the allocated buffer */
 351         ASSERT(UpcaseString.Buffer != UpcaseBuffer);
 352         RtlFreeUnicodeString(&UpcaseString);
 353     }
 354
 355     return STATUS_SUCCESS;
 356 }
 357
 358 NTSTATUS
 359 NTAPI
 360 NpFsdCreate(IN PDEVICE_OBJECT DeviceObject,
 361             IN PIRP Irp)
 362 {
 363     IO_STATUS_BLOCK IoStatus;
 364     PEXTENDED_IO_STACK_LOCATION IoStack;
 365     UNICODE_STRING FileName;
 366     PFILE_OBJECT FileObject;
 367     PFILE_OBJECT RelatedFileObject;
 368     NODE_TYPE_CODE Type;
 369     PNP_CCB Ccb;
 370     PNP_FCB Fcb;
 371     PNP_DCB Dcb;
 372     ACCESS_MASK DesiredAccess;
 373     LIST_ENTRY DeferredList;
 374     UNICODE_STRING Prefix;
 375     TRACE("Entered\n");
 376
 377     InitializeListHead(&DeferredList);
 378     IoStack = (PEXTENDED_IO_STACK_LOCATION)IoGetCurrentIrpStackLocation(Irp);
 379     FileObject = IoStack->FileObject;
 380     RelatedFileObject = FileObject->RelatedFileObject;
 381     FileName = FileObject->FileName;
 382     DesiredAccess = IoStack->Parameters.CreatePipe.SecurityContext->DesiredAccess;
 383
 384     IoStatus.Information = 0;
 385
 386     FsRtlEnterFileSystem();
 387     NpAcquireExclusiveVcb();
 388
 389     if (RelatedFileObject)
 390     {
 391         Type = NpDecodeFileObject(RelatedFileObject, (PVOID*)&Fcb, &Ccb, FALSE);
 392     }
 393     else
 394     {
 395         Type = 0;
 396         Fcb = NULL;
 397         Ccb = NULL;
 398     }
 399
 400     if (FileName.Length)
 401     {
 402         if ((FileName.Length == sizeof(OBJ_NAME_PATH_SEPARATOR)) &&
 403             (FileName.Buffer[0] == OBJ_NAME_PATH_SEPARATOR) &&
 404             !(RelatedFileObject))
 405         {
 406             IoStatus = NpOpenNamedPipeRootDirectory(NpVcb->RootDcb,
 407                                                     FileObject,
 408                                                     DesiredAccess,
 409                                                     &DeferredList);
 410             goto Quickie;
 411         }
 412     }
 413     else if (!(RelatedFileObject) || (Type == NPFS_NTC_VCB))
 414     {
 415         IoStatus = NpOpenNamedPipeFileSystem(FileObject,
 416                                              DesiredAccess);
 417         goto Quickie;
 418     }
 419     else if (Type == NPFS_NTC_ROOT_DCB)
 420     {
 421         IoStatus = NpOpenNamedPipeRootDirectory(NpVcb->RootDcb,
 422                                                 FileObject,
 423                                                 DesiredAccess,
 424                                                 &DeferredList);
 425         goto Quickie;
 426     }
 427
 428     IoStatus.Status = NpTranslateAlias(&FileName);
 429     if (!NT_SUCCESS(IoStatus.Status)) goto Quickie;
 430
 431     if (RelatedFileObject)
 432     {
 433         if (Type == NPFS_NTC_ROOT_DCB)
 434         {
 435             Dcb = (PNP_DCB)Ccb;
 436             IoStatus.Status = NpFindRelativePrefix(Dcb,
 437                                                    &FileName,
 438                                                    1,
 439                                                    &Prefix,
 440                                                    &Fcb);
 441             if (!NT_SUCCESS(IoStatus.Status))
 442             {
 443                 goto Quickie;
 444             }
 445         }
 446         else if ((Type != NPFS_NTC_CCB) || (FileName.Length))
 447         {
 448             IoStatus.Status = STATUS_OBJECT_NAME_INVALID;
 449             goto Quickie;
 450         }
 451         else
 452         {
 453             Prefix.Length = 0;
 454         }
 455     }
 456     else
 457     {
 458         if ((FileName.Length <= sizeof(OBJ_NAME_PATH_SEPARATOR)) ||
 459             (FileName.Buffer[0] != OBJ_NAME_PATH_SEPARATOR))
 460         {
 461             IoStatus.Status = STATUS_OBJECT_NAME_INVALID;
 462             goto Quickie;
 463         }
 464
 465         Fcb = NpFindPrefix(&FileName, 1, &Prefix);
 466     }
 467
 468     if (Prefix.Length)
 469     {
 470         IoStatus.Status = Fcb->NodeType != NPFS_NTC_FCB ?
 471                            STATUS_OBJECT_NAME_NOT_FOUND :
 472                            STATUS_OBJECT_NAME_INVALID;
 473         goto Quickie;
 474     }
 475
 476     if (Fcb->NodeType != NPFS_NTC_FCB)
 477     {
 478         IoStatus.Status = STATUS_OBJECT_NAME_INVALID;
 479         goto Quickie;
 480     }
 481
 482     if (!Fcb->ServerOpenCount)
 483     {
 484         IoStatus.Status = STATUS_OBJECT_NAME_NOT_FOUND;
 485         goto Quickie;
 486     }
 487
 488     IoStatus = NpCreateClientEnd(Fcb,
 489                                  FileObject,
 490                                  DesiredAccess,
 491                                  IoStack->Parameters.CreatePipe.
 492                                  SecurityContext->SecurityQos,
 493                                  IoStack->Parameters.CreatePipe.
 494                                  SecurityContext->AccessState,
 495                                  IoStack->Flags &
 496                                  SL_FORCE_ACCESS_CHECK ?
 497                                  UserMode : Irp->RequestorMode,
 498                                  Irp->Tail.Overlay.Thread,
 499                                  &DeferredList);
 500
 501 Quickie:
 502     NpReleaseVcb();
 503     NpCompleteDeferredIrps(&DeferredList);
 504     FsRtlExitFileSystem();
 505
 506     Irp->IoStatus = IoStatus;
 507     IoCompleteRequest(Irp, IO_NO_INCREMENT);
 508     TRACE("Leaving, IoStatus.Status = %lx\n", IoStatus.Status);
 509     return IoStatus.Status;
 510 }
 511
 512 IO_STATUS_BLOCK
 513 NTAPI
 514 NpCreateExistingNamedPipe(IN PNP_FCB Fcb,
 515                           IN PFILE_OBJECT FileObject,
 516                           IN ACCESS_MASK DesiredAccess,
 517                           IN PACCESS_STATE AccessState,
 518                           IN KPROCESSOR_MODE PreviousMode,
 519                           IN ULONG Disposition,
 520                           IN ULONG ShareAccess,
 521                           IN PNAMED_PIPE_CREATE_PARAMETERS Parameters,
 522                           IN PEPROCESS Process,
 523                           OUT PLIST_ENTRY List)
 524 {
 525     PSECURITY_SUBJECT_CONTEXT SubjectSecurityContext;
 526     IO_STATUS_BLOCK IoStatus;
 527     UNICODE_STRING ObjectTypeName;
 528     ACCESS_MASK GrantedAccess;
 529     PNP_CCB Ccb;
 530     PPRIVILEGE_SET Privileges;
 531     USHORT NamedPipeConfiguration, CheckShareAccess;
 532     BOOLEAN AccessGranted;
 533     PAGED_CODE();
 534     TRACE("Entered\n");
 535
 536     Privileges = NULL;
 537
 538     NamedPipeConfiguration = Fcb->NamedPipeConfiguration;
 539
 540     SubjectSecurityContext = &AccessState->SubjectSecurityContext;
 541     SeLockSubjectContext(SubjectSecurityContext);
 542
 543     IoStatus.Information = 0;
 544
 545     AccessGranted = SeAccessCheck(Fcb->SecurityDescriptor,
 546                                   SubjectSecurityContext,
 547                                   TRUE,
 548                                   DesiredAccess | 4,
 549                                   0,
 550                                   &Privileges,
 551                                   IoGetFileObjectGenericMapping(),
 552                                   PreviousMode,
 553                                   &GrantedAccess,
 554                                   &IoStatus.Status);
 555
 556     if (Privileges)
 557     {
 558         SeAppendPrivileges(AccessState, Privileges);
 559         SeFreePrivileges(Privileges);
 560     }
 561
 562     if (AccessGranted)
 563     {
 564         AccessState->PreviouslyGrantedAccess |= GrantedAccess;
 565         AccessState->RemainingDesiredAccess &= ~(GrantedAccess | 0x2000000);
 566     }
 567
 568     ObjectTypeName.Buffer = L"NamedPipe";
 569     ObjectTypeName.Length = 18;
 570     SeOpenObjectAuditAlarm(&ObjectTypeName,
 571                            NULL,
 572                            &FileObject->FileName,
 573                            Fcb->SecurityDescriptor,
 574                            AccessState,
 575                            FALSE,
 576                            AccessGranted,
 577                            PreviousMode,
 578                            &AccessState->GenerateOnClose);
 579
 580     SeUnlockSubjectContext(SubjectSecurityContext);
 581     if (!AccessGranted)
 582     {
 583         TRACE("Leaving, IoStatus.Status = %lx\n", IoStatus.Status);
 584         return IoStatus;
 585     }
 586
 587     if (Fcb->CurrentInstances >= Fcb->MaximumInstances)
 588     {
 589         IoStatus.Status = STATUS_INSTANCE_NOT_AVAILABLE;
 590         TRACE("Leaving, IoStatus.Status = %lx\n", IoStatus.Status);
 591         return IoStatus;
 592     }
 593
 594     if (Disposition == FILE_CREATE)
 595     {
 596         IoStatus.Status = STATUS_ACCESS_DENIED;
 597         TRACE("Leaving, IoStatus.Status = %lx\n", IoStatus.Status);
 598         return IoStatus;
 599     }
 600
 601     CheckShareAccess = 0;
 602     if (NamedPipeConfiguration == FILE_PIPE_FULL_DUPLEX)
 603     {
 604         CheckShareAccess = FILE_SHARE_READ | FILE_SHARE_WRITE;
 605     }
 606     else if (NamedPipeConfiguration == FILE_PIPE_OUTBOUND)
 607     {
 608         CheckShareAccess = FILE_SHARE_READ;
 609     }
 610     else if (NamedPipeConfiguration == FILE_PIPE_INBOUND)
 611     {
 612         CheckShareAccess = FILE_SHARE_WRITE;
 613     }
 614
 615     if (CheckShareAccess != ShareAccess)
 616     {
 617         IoStatus.Status = STATUS_ACCESS_DENIED;
 618         TRACE("Leaving, IoStatus.Status = %lx\n", IoStatus.Status);
 619         return IoStatus;
 620     }
 621
 622     IoStatus.Status = NpCreateCcb(Fcb,
 623                                   FileObject,
 624                                   FILE_PIPE_LISTENING_STATE,
 625                                   Parameters->ReadMode & 0xFF,
 626                                   Parameters->CompletionMode & 0xFF,
 627                                   Parameters->InboundQuota,
 628                                   Parameters->OutboundQuota,
 629                                   &Ccb);
 630     if (!NT_SUCCESS(IoStatus.Status)) return IoStatus;
 631
 632     IoStatus.Status = NpCancelWaiter(&NpVcb->WaitQueue,
 633                                      &Fcb->FullName,
 634                                      FALSE,
 635                                      List);
 636     if (!NT_SUCCESS(IoStatus.Status))
 637     {
 638         --Ccb->Fcb->CurrentInstances;
 639         NpDeleteCcb(Ccb, List);
 640         TRACE("Leaving, IoStatus.Status = %lx\n", IoStatus.Status);
 641         return IoStatus;
 642     }
 643
 644     NpSetFileObject(FileObject, Ccb, Ccb->NonPagedCcb, TRUE);
 645     Ccb->FileObject[FILE_PIPE_SERVER_END] = FileObject;
 646     NpCheckForNotify(Fcb->ParentDcb, 0, List);
 647
 648     IoStatus.Status = STATUS_SUCCESS;
 649     IoStatus.Information = FILE_OPENED;
 650     TRACE("Leaving, IoStatus.Status = %lx\n", IoStatus.Status);
 651     return IoStatus;
 652 }
 653
 654 NTSTATUS
 655 NTAPI
 656 NpCreateNewNamedPipe(IN PNP_DCB Dcb,
 657                      IN PFILE_OBJECT FileObject,
 658                      IN UNICODE_STRING PipeName,
 659                      IN ACCESS_MASK DesiredAccess,
 660                      IN PACCESS_STATE AccessState,
 661                      IN USHORT Disposition,
 662                      IN USHORT ShareAccess,
 663                      IN PNAMED_PIPE_CREATE_PARAMETERS Parameters,
 664                      IN PEPROCESS Process,
 665                      IN PLIST_ENTRY List,
 666                      OUT PIO_STATUS_BLOCK IoStatus)
 667 {
 668     NTSTATUS Status;
 669     USHORT NamedPipeConfiguration;
 670     PSECURITY_SUBJECT_CONTEXT SecurityContext;
 671     PSECURITY_DESCRIPTOR SecurityDescriptor, CachedSecurityDescriptor;
 672     PNP_CCB Ccb;
 673     PNP_FCB Fcb;
 674     PAGED_CODE();
 675     TRACE("Entered\n");
 676
 677     if (!(Parameters->TimeoutSpecified) ||
 678         !(Parameters->MaximumInstances) ||
 679         (Parameters->DefaultTimeout.QuadPart >= 0))
 680     {
 681         Status = STATUS_INVALID_PARAMETER;
 682         goto Quickie;
 683     }
 684
 685     if (Disposition == FILE_OPEN)
 686     {
 687         Status = STATUS_OBJECT_NAME_NOT_FOUND;
 688         goto Quickie;
 689     }
 690
 691     if (ShareAccess == (FILE_SHARE_READ | FILE_SHARE_WRITE))
 692     {
 693         NamedPipeConfiguration = FILE_PIPE_FULL_DUPLEX;
 694     }
 695     else if (ShareAccess == FILE_SHARE_READ)
 696     {
 697         NamedPipeConfiguration = FILE_PIPE_OUTBOUND;
 698     }
 699     else if (ShareAccess == FILE_SHARE_WRITE)
 700     {
 701         NamedPipeConfiguration = FILE_PIPE_INBOUND;
 702     }
 703     else
 704     {
 705         Status = STATUS_INVALID_PARAMETER;
 706         goto Quickie;
 707     }
 708
 709     if (Parameters->NamedPipeType == FILE_PIPE_BYTE_STREAM_TYPE &&
 710         Parameters->ReadMode == FILE_PIPE_MESSAGE_MODE)
 711     {
 712         Status = STATUS_INVALID_PARAMETER;
 713         goto Quickie;
 714     }
 715
 716     Status = NpCreateFcb(Dcb,
 717                          &PipeName,
 718                          Parameters->MaximumInstances,
 719                          Parameters->DefaultTimeout,
 720                          NamedPipeConfiguration,
 721                          Parameters->NamedPipeType & 0xFFFF,
 722                          &Fcb);
 723     if (!NT_SUCCESS(Status)) goto Quickie;
 724
 725     Status = NpCreateCcb(Fcb,
 726                          FileObject,
 727                          FILE_PIPE_LISTENING_STATE,
 728                          Parameters->ReadMode & 0xFF,
 729                          Parameters->CompletionMode & 0xFF,
 730                          Parameters->InboundQuota,
 731                          Parameters->OutboundQuota,
 732                          &Ccb);
 733     if (!NT_SUCCESS(Status))
 734     {
 735         NpDeleteFcb(Fcb, List);
 736         goto Quickie;
 737     }
 738
 739     SecurityContext = &AccessState->SubjectSecurityContext;
 740     SeLockSubjectContext(SecurityContext);
 741
 742     Status = SeAssignSecurity(NULL,
 743                               AccessState->SecurityDescriptor,
 744                               &SecurityDescriptor,
 745                               FALSE,
 746                               SecurityContext,
 747                               IoGetFileObjectGenericMapping(),
 748                               PagedPool);
 749     SeUnlockSubjectContext(SecurityContext);
 750     if (!NT_SUCCESS(Status))
 751     {
 752         NpDeleteCcb(Ccb, List);
 753         NpDeleteFcb(Fcb, List);
 754         goto Quickie;
 755     }
 756
 757     Status = ObLogSecurityDescriptor(SecurityDescriptor,
 758                                      &CachedSecurityDescriptor,
 759                                      1);
 760     ExFreePoolWithTag(SecurityDescriptor, 0);
 761
 762     if (!NT_SUCCESS(Status))
 763     {
 764         NpDeleteCcb(Ccb, List);
 765         NpDeleteFcb(Fcb, List);
 766         goto Quickie;
 767     }
 768
 769     Fcb->SecurityDescriptor = CachedSecurityDescriptor;
 770
 771     NpSetFileObject(FileObject, Ccb, Ccb->NonPagedCcb, TRUE);
 772     Ccb->FileObject[FILE_PIPE_SERVER_END] = FileObject;
 773
 774     NpCheckForNotify(Dcb, TRUE, List);
 775
 776     IoStatus->Status = STATUS_SUCCESS;
 777     IoStatus->Information = FILE_CREATED;
 778
 779     TRACE("Leaving, STATUS_SUCCESS\n");
 780     return STATUS_SUCCESS;
 781
 782 Quickie:
 783     TRACE("Leaving, Status = %lx\n", Status);
 784     IoStatus->Information = 0;
 785     IoStatus->Status = Status;
 786     return Status;
 787 }
 788
 789 NTSTATUS
 790 NTAPI
 791 NpFsdCreateNamedPipe(IN PDEVICE_OBJECT DeviceObject,
 792                      IN PIRP Irp)
 793 {
 794     PEXTENDED_IO_STACK_LOCATION IoStack;
 795     PFILE_OBJECT FileObject;
 796     PFILE_OBJECT RelatedFileObject;
 797     USHORT Disposition, ShareAccess;
 798     PEPROCESS Process;
 799     LIST_ENTRY DeferredList;
 800     UNICODE_STRING FileName;
 801     PNP_FCB Fcb;
 802     UNICODE_STRING Prefix;
 803     PNAMED_PIPE_CREATE_PARAMETERS Parameters;
 804     IO_STATUS_BLOCK IoStatus;
 805     TRACE("Entered\n");
 806
 807     InitializeListHead(&DeferredList);
 808     Process = IoGetRequestorProcess(Irp);
 809
 810     IoStack = (PEXTENDED_IO_STACK_LOCATION) IoGetCurrentIrpStackLocation(Irp);
 811     FileObject = IoStack->FileObject;
 812     RelatedFileObject = FileObject->RelatedFileObject;
 813
 814     Disposition = (IoStack->Parameters.CreatePipe.Options >> 24) & 0xFF;
 815     ShareAccess = IoStack->Parameters.CreatePipe.ShareAccess & 0xFFFF;
 816     Parameters = IoStack->Parameters.CreatePipe.Parameters;
 817
 818     FileName = FileObject->FileName;
 819
 820     IoStatus.Information = 0;
 821
 822     FsRtlEnterFileSystem();
 823     NpAcquireExclusiveVcb();
 824
 825     if (RelatedFileObject)
 826     {
 827         Fcb = (PNP_FCB)((ULONG_PTR)RelatedFileObject->FsContext & ~1);
 828         if (!(Fcb) ||
 829             (Fcb->NodeType != NPFS_NTC_ROOT_DCB) ||
 830             (FileName.Length < sizeof(WCHAR)) ||
 831             (FileName.Buffer[0] == OBJ_NAME_PATH_SEPARATOR))
 832         {
 833             IoStatus.Status = STATUS_OBJECT_NAME_INVALID;
 834             goto Quickie;
 835         }
 836
 837         IoStatus.Status = NpFindRelativePrefix(RelatedFileObject->FsContext,
 838                                                &FileName,
 839                                                TRUE,
 840                                                &Prefix,
 841                                                &Fcb);
 842         if (!NT_SUCCESS(IoStatus.Status))
 843         {
 844             goto Quickie;
 845         }
 846     }
 847     else
 848     {
 849         if (FileName.Length <= sizeof(OBJ_NAME_PATH_SEPARATOR) ||
 850             FileName.Buffer[0] != OBJ_NAME_PATH_SEPARATOR)
 851         {
 852             IoStatus.Status = STATUS_OBJECT_NAME_INVALID;
 853             goto Quickie;
 854         }
 855
 856         Fcb = NpFindPrefix(&FileName, 1, &Prefix);
 857     }
 858
 859     if (Prefix.Length)
 860     {
 861         if (Fcb->NodeType == NPFS_NTC_ROOT_DCB)
 862         {
 863             IoStatus.Status = NpCreateNewNamedPipe((PNP_DCB)Fcb,
 864                                                    FileObject,
 865                                                    FileName,
 866                                                    IoStack->Parameters.CreatePipe.
 867                                                    SecurityContext->DesiredAccess,
 868                                                    IoStack->Parameters.CreatePipe.
 869                                                    SecurityContext->AccessState,
 870                                                    Disposition,
 871                                                    ShareAccess,
 872                                                    Parameters,
 873                                                    Process,
 874                                                    &DeferredList,
 875                                                    &IoStatus);
 876             goto Quickie;
 877         }
 878         else
 879         {
 880             IoStatus.Status = STATUS_OBJECT_NAME_INVALID;
 881             goto Quickie;
 882         }
 883     }
 884
 885     if (Fcb->NodeType != NPFS_NTC_FCB)
 886     {
 887         IoStatus.Status = STATUS_OBJECT_NAME_INVALID;
 888         goto Quickie;
 889     }
 890
 891     IoStatus = NpCreateExistingNamedPipe(Fcb,
 892                                          FileObject,
 893                                          IoStack->Parameters.CreatePipe.
 894                                          SecurityContext->DesiredAccess,
 895                                          IoStack->Parameters.CreatePipe.
 896                                          SecurityContext->AccessState,
 897                                          IoStack->Flags &
 898                                          SL_FORCE_ACCESS_CHECK ?
 899                                          UserMode : Irp->RequestorMode,
 900                                          Disposition,
 901                                          ShareAccess,
 902                                          Parameters,
 903                                          Process,
 904                                          &DeferredList);
 905
 906 Quickie:
 907     NpReleaseVcb();
 908     NpCompleteDeferredIrps(&DeferredList);
 909     FsRtlExitFileSystem();
 910
 911     TRACE("Leaving, IoStatus.Status = %lx\n", IoStatus.Status);
 912     Irp->IoStatus = IoStatus;
 913     IoCompleteRequest(Irp, IO_NAMED_PIPE_INCREMENT);
 914     return IoStatus.Status;
 915 }
 916
 917 /* EOF */