ReactOS  0.4.14-dev-593-g1793dcc
mountmgr.c
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1 /*
2  * ReactOS kernel
3  * Copyright (C) 2011 ReactOS Team
4  *
5  * This program is free software; you can redistribute it and/or modify
6  * it under the terms of the GNU General Public License as published by
7  * the Free Software Foundation; either version 2 of the License, or
8  * (at your option) any later version.
9  *
10  * This program is distributed in the hope that it will be useful,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13  * GNU General Public License for more details.
14  *
15  * You should have received a copy of the GNU General Public License
16  * along with this program; if not, write to the Free Software
17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
18  *
19  * COPYRIGHT: See COPYING in the top level directory
20  * PROJECT: ReactOS kernel
21  * FILE: drivers/filesystem/mountmgr/mountmgr.c
22  * PURPOSE: Mount Manager
23  * PROGRAMMER: Pierre Schweitzer (pierre.schweitzer@reactos.org)
24  * Alex Ionescu (alex.ionescu@reactos.org)
25  */
26 
27 #include "mntmgr.h"
28 
29 #define NDEBUG
30 #include <debug.h>
31 
32 #if defined(ALLOC_PRAGMA)
33 #pragma alloc_text(INIT, MountmgrReadNoAutoMount)
34 #pragma alloc_text(INIT, DriverEntry)
35 #endif
36 
37 /* FIXME */
38 GUID MountedDevicesGuid = {0x53F5630D, 0xB6BF, 0x11D0, {0x94, 0xF2, 0x00, 0xA0, 0xC9, 0x1E, 0xFB, 0x8B}};
39 
43 
44 static const WCHAR Cunc[] = L"\\??\\C:";
45 #define Cunc_LETTER_POSITION 4
46 
47 /*
48  * @implemented
49  */
50 BOOLEAN
52 {
56 
57  /* Prepare to look in the registry to see if
58  * given volume is offline
59  */
65  QueryTable[0].DefaultLength = sizeof(ULONG);
67 
68  Default = 0;
69 
70  /* Query status */
73  QueryTable,
74  NULL,
75  NULL);
76  if (!NT_SUCCESS(Status))
77  {
78  IsOffline = 0;
79  }
80 
81  return (IsOffline != 0);
82 }
83 
84 /*
85  * @implemented
86  */
87 BOOLEAN
89 {
90  PLIST_ENTRY NextEntry;
91  PSYMLINK_INFORMATION SymlinkInfo;
92 
93  /* Browse all the symlinks to check if there is at least a drive letter */
94  for (NextEntry = DeviceInformation->SymbolicLinksListHead.Flink;
95  NextEntry != &DeviceInformation->SymbolicLinksListHead;
96  NextEntry = NextEntry->Flink)
97  {
98  SymlinkInfo = CONTAINING_RECORD(NextEntry, SYMLINK_INFORMATION, SymbolicLinksListEntry);
99 
100  if (IsDriveLetter(&SymlinkInfo->Name) && SymlinkInfo->Online)
101  {
102  return TRUE;
103  }
104  }
105 
106  return FALSE;
107 }
108 
109 /*
110  * @implemented
111  */
112 NTSTATUS
115  IN UCHAR Letter,
117 {
119 
120  /* Allocate a big enough buffer to contain the symbolic link */
121  DriveLetter->MaximumLength = DosDevices.Length + 3 * sizeof(WCHAR);
122  DriveLetter->Buffer = AllocatePool(DriveLetter->MaximumLength);
123  if (!DriveLetter->Buffer)
124  {
126  }
127 
128  /* Copy prefix */
129  RtlCopyUnicodeString(DriveLetter, &DosDevices);
130 
131  /* Update string to reflect real contents */
132  DriveLetter->Length = DosDevices.Length + 2 * sizeof(WCHAR);
133  DriveLetter->Buffer[DosDevices.Length / sizeof(WCHAR) + 2] = UNICODE_NULL;
134  DriveLetter->Buffer[DosDevices.Length / sizeof(WCHAR) + 1] = L':';
135 
136  /* If caller wants a no drive entry */
137  if (Letter == (UCHAR)-1)
138  {
139  /* Then, create a no letter entry */
140  CreateNoDriveLetterEntry(UniqueId);
141  FreePool(DriveLetter->Buffer);
142  return STATUS_UNSUCCESSFUL;
143  }
144  else if (Letter)
145  {
146  /* Use the letter given by the caller */
147  DriveLetter->Buffer[DosDevices.Length / sizeof(WCHAR)] = (WCHAR)Letter;
149  if (NT_SUCCESS(Status))
150  {
151  return Status;
152  }
153  }
154 
155  /* If caller didn't provide a letter, let's find one for him */
156 
158  {
159  /* If the device is a floppy, start with letter A */
160  Letter = 'A';
161  }
163  {
164  /* If the device is a CD-ROM, start with letter D */
165  Letter = 'D';
166  }
167  else
168  {
169  /* Finally, if it's a disk, use C */
170  Letter = 'C';
171  }
172 
173  /* Try to affect a letter (up to Z, ofc) until it's possible */
174  for (; Letter <= 'Z'; Letter++)
175  {
176  DriveLetter->Buffer[DosDevices.Length / sizeof(WCHAR)] = (WCHAR)Letter;
178  if (NT_SUCCESS(Status))
179  {
180  DPRINT("Assigned drive %c: to %wZ\n", Letter, DeviceName);
181  return Status;
182  }
183  }
184 
185  /* We failed to allocate a letter */
186  FreePool(DriveLetter->Buffer);
187  DPRINT("Failed to create a drive letter for %wZ\n", DeviceName);
188  return Status;
189 }
190 
191 /*
192  * @implemented
193  */
194 NTSTATUS
197  OUT PMOUNTDEV_UNIQUE_ID * UniqueId OPTIONAL,
199  OUT PBOOLEAN GptDriveLetter OPTIONAL,
200  OUT PBOOLEAN HasGuid OPTIONAL,
201  IN OUT LPGUID StableGuid OPTIONAL,
202  OUT PBOOLEAN Valid OPTIONAL)
203 {
204  PIRP Irp;
205  USHORT Size;
206  KEVENT Event;
207  BOOLEAN IsRemovable;
211  PIO_STACK_LOCATION Stack;
212  NTSTATUS Status, IntStatus;
216  STORAGE_DEVICE_NUMBER StorageDeviceNumber;
218 
219  /* Get device associated with the symbolic name */
222  &FileObject,
223  &DeviceObject);
224  if (!NT_SUCCESS(Status))
225  {
226  return Status;
227  }
228 
229  /* The associate FO can't have a file name */
230  if (FileObject->FileName.Length)
231  {
234  }
235 
236  /* Check if it's removable & return to the user (if asked to) */
237  IsRemovable = (FileObject->DeviceObject->Characteristics & FILE_REMOVABLE_MEDIA);
238  if (Removable)
239  {
240  *Removable = IsRemovable;
241  }
242 
243  /* Get the attached device */
245 
246  /* If we've been asked for a GPT drive letter */
247  if (GptDriveLetter)
248  {
249  /* Consider it has one */
250  *GptDriveLetter = TRUE;
251 
252  if (!IsRemovable)
253  {
254  /* Query the GPT attributes */
257  DeviceObject,
258  NULL,
259  0,
260  &GptAttributes,
261  sizeof(GptAttributes),
262  FALSE,
263  &Event,
264  &IoStatusBlock);
265  if (!Irp)
266  {
270  }
271 
273  if (Status == STATUS_PENDING)
274  {
277  }
278 
279  /* In case of failure, don't fail, that's no vital */
280  if (!NT_SUCCESS(Status))
281  {
283  }
284  /* Check if it has a drive letter */
285  else if (!(GptAttributes.GptAttributes &
286  GPT_BASIC_DATA_ATTRIBUTE_NO_DRIVE_LETTER))
287  {
288  *GptDriveLetter = FALSE;
289  }
290  }
291  }
292 
293  /* If caller wants to know if there's valid contents */
294  if (Valid)
295  {
296  /* Suppose it's not OK */
297  *Valid = FALSE;
298 
299  if (!IsRemovable)
300  {
301  /* Query partitions information */
304  DeviceObject,
305  NULL,
306  0,
307  &PartitionInfo,
308  sizeof(PartitionInfo),
309  FALSE,
310  &Event,
311  &IoStatusBlock);
312  if (!Irp)
313  {
317  }
318 
320  if (Status == STATUS_PENDING)
321  {
324  }
325 
326  /* Once again here, failure isn't major */
327  if (!NT_SUCCESS(Status))
328  {
330  }
331  /* Verify we know something in */
332  else if (PartitionInfo.PartitionStyle == PARTITION_STYLE_MBR &&
333  IsRecognizedPartition(PartitionInfo.Mbr.PartitionType))
334  {
335  *Valid = TRUE;
336  }
337 
338  /* It looks correct, ensure it is & query device number */
339  if (*Valid)
340  {
343  DeviceObject,
344  NULL,
345  0,
346  &StorageDeviceNumber,
347  sizeof(StorageDeviceNumber),
348  FALSE,
349  &Event,
350  &IoStatusBlock);
351  if (!Irp)
352  {
356  }
357 
359  if (Status == STATUS_PENDING)
360  {
363  }
364 
365  if (!NT_SUCCESS(Status))
366  {
368  }
369  else
370  {
371  *Valid = FALSE;
372  }
373  }
374  }
375  }
376 
377  /* If caller needs device name */
378  if (DeviceName)
379  {
380  /* Allocate a buffer just to request length */
381  Name = AllocatePool(sizeof(MOUNTDEV_NAME));
382  if (!Name)
383  {
387  }
388 
389  /* Query device name */
392  DeviceObject,
393  NULL,
394  0,
395  Name,
396  sizeof(MOUNTDEV_NAME),
397  FALSE,
398  &Event,
399  &IoStatusBlock);
400  if (!Irp)
401  {
402  FreePool(Name);
406  }
407 
409  Stack->FileObject = FileObject;
410 
412  if (Status == STATUS_PENDING)
413  {
416  }
417 
418  /* Now, we've got the correct length */
420  {
421  Size = Name->NameLength + sizeof(MOUNTDEV_NAME);
422 
423  FreePool(Name);
424 
425  /* Allocate proper size */
427  if (!Name)
428  {
432  }
433 
434  /* And query name (for real that time) */
437  DeviceObject,
438  NULL,
439  0,
440  Name,
441  Size,
442  FALSE,
443  &Event,
444  &IoStatusBlock);
445  if (!Irp)
446  {
447  FreePool(Name);
451  }
452 
454  Stack->FileObject = FileObject;
455 
457  if (Status == STATUS_PENDING)
458  {
461  }
462  }
463 
464  if (NT_SUCCESS(Status))
465  {
466  /* Copy back found name to the caller */
467  DeviceName->Length = Name->NameLength;
468  DeviceName->MaximumLength = Name->NameLength + sizeof(WCHAR);
469  DeviceName->Buffer = AllocatePool(DeviceName->MaximumLength);
470  if (!DeviceName->Buffer)
471  {
473  }
474  else
475  {
476  RtlCopyMemory(DeviceName->Buffer, Name->Name, Name->NameLength);
477  DeviceName->Buffer[Name->NameLength / sizeof(WCHAR)] = UNICODE_NULL;
478  }
479  }
480 
481  FreePool(Name);
482  }
483 
484  if (!NT_SUCCESS(Status))
485  {
488  return Status;
489  }
490 
491  /* If caller wants device unique ID */
492  if (UniqueId)
493  {
494  /* Prepare buffer to probe length */
496  if (!Id)
497  {
501  }
502 
503  /* Query unique ID length */
506  DeviceObject,
507  NULL,
508  0,
509  Id,
510  sizeof(MOUNTDEV_UNIQUE_ID),
511  FALSE,
512  &Event,
513  &IoStatusBlock);
514  if (!Irp)
515  {
516  FreePool(Id);
520  }
521 
523  Stack->FileObject = FileObject;
524 
526  if (Status == STATUS_PENDING)
527  {
530  }
531 
532  /* Retry with appropriate length */
534  {
535  Size = Id->UniqueIdLength + sizeof(MOUNTDEV_UNIQUE_ID);
536 
537  FreePool(Id);
538 
539  /* Allocate the correct buffer */
540  Id = AllocatePool(Size);
541  if (!Id)
542  {
546  }
547 
548  /* Query unique ID */
551  DeviceObject,
552  NULL,
553  0,
554  Id,
555  Size,
556  FALSE,
557  &Event,
558  &IoStatusBlock);
559  if (!Irp)
560  {
561  FreePool(Id);
565  }
566 
568  Stack->FileObject = FileObject;
569 
571  if (Status == STATUS_PENDING)
572  {
575  }
576  }
577 
578  /* Hands back unique ID */
579  if (NT_SUCCESS(Status))
580  {
581  *UniqueId = Id;
582  }
583  else
584  {
585  /* In case of failure, also free the rest */
586  FreePool(Id);
587  if (DeviceName->Length)
588  {
589  FreePool(DeviceName->Buffer);
590  }
591 
594 
595  return Status;
596  }
597  }
598 
599  /* If user wants to know about GUID */
600  if (HasGuid)
601  {
602  /* Query device stable GUID */
605  DeviceObject,
606  NULL,
607  0,
608  StableGuid,
609  sizeof(GUID),
610  FALSE,
611  &Event,
612  &IoStatusBlock);
613  if (!Irp)
614  {
618  }
619 
621  Stack->FileObject = FileObject;
622 
623  IntStatus = IoCallDriver(DeviceObject, Irp);
624  if (IntStatus == STATUS_PENDING)
625  {
627  IntStatus = IoStatusBlock.Status;
628  }
629 
630  *HasGuid = NT_SUCCESS(IntStatus);
631  }
632 
635  return Status;
636 }
637 
638 /*
639  * @implemented
640  */
641 NTSTATUS
644  IN BOOLEAN DeviceNameGiven,
645  OUT PDEVICE_INFORMATION * DeviceInformation)
646 {
648  PLIST_ENTRY NextEntry;
651 
652  /* If a device name was given, use it */
653  if (DeviceNameGiven)
654  {
655  DeviceName.Length = SymbolicName->Length;
656  DeviceName.Buffer = SymbolicName->Buffer;
657  }
658  else
659  {
660  /* Otherwise, query it */
662  &DeviceName,
663  NULL, NULL,
664  NULL, NULL,
665  NULL, NULL);
666  if (!NT_SUCCESS(Status))
667  {
668  return Status;
669  }
670  }
671 
672  /* Look for device information matching devive */
673  for (NextEntry = DeviceExtension->DeviceListHead.Flink;
674  NextEntry != &(DeviceExtension->DeviceListHead);
675  NextEntry = NextEntry->Flink)
676  {
677  DeviceInfo = CONTAINING_RECORD(NextEntry,
679  DeviceListEntry);
680 
681  if (RtlEqualUnicodeString(&DeviceName, &(DeviceInfo->DeviceName), TRUE))
682  {
683  break;
684  }
685  }
686 
687  /* Release our buffer if required */
688  if (!DeviceNameGiven)
689  {
690  FreePool(DeviceName.Buffer);
691  }
692 
693  /* Return found information */
694  if (NextEntry == &(DeviceExtension->DeviceListHead))
695  {
697  }
698 
699  *DeviceInformation = DeviceInfo;
700  return STATUS_SUCCESS;
701 }
702 
703 /*
704  * @implemented
705  */
706 VOID
708 {
709  FreePool(DeviceInformation->SymbolicName.Buffer);
710  FreePool(DeviceInformation);
711 }
712 
713 /*
714  * @implemented
715  */
716 VOID
718 {
719  PLIST_ENTRY NextEntry;
720  PSYMLINK_INFORMATION SymLink;
721  PUNIQUE_ID_REPLICATE UniqueId;
722  PASSOCIATED_DEVICE_ENTRY AssociatedDevice;
723 
724  /* Purge symbolic links list */
725  while (!IsListEmpty(&(DeviceInformation->SymbolicLinksListHead)))
726  {
727  NextEntry = RemoveHeadList(&(DeviceInformation->SymbolicLinksListHead));
728  SymLink = CONTAINING_RECORD(NextEntry, SYMLINK_INFORMATION, SymbolicLinksListEntry);
729 
730  GlobalDeleteSymbolicLink(&(SymLink->Name));
731  FreePool(SymLink->Name.Buffer);
732  }
733 
734  /* Purge replicated unique IDs list */
735  while (!IsListEmpty(&(DeviceInformation->ReplicatedUniqueIdsListHead)))
736  {
737  NextEntry = RemoveHeadList(&(DeviceInformation->ReplicatedUniqueIdsListHead));
738  UniqueId = CONTAINING_RECORD(NextEntry, UNIQUE_ID_REPLICATE, ReplicatedUniqueIdsListEntry);
739 
740  FreePool(UniqueId->UniqueId);
741  FreePool(UniqueId);
742  }
743 
744  while (!IsListEmpty(&(DeviceInformation->AssociatedDevicesHead)))
745  {
746  NextEntry = RemoveHeadList(&(DeviceInformation->AssociatedDevicesHead));
747  AssociatedDevice = CONTAINING_RECORD(NextEntry, ASSOCIATED_DEVICE_ENTRY, AssociatedDevicesEntry);
748 
749  FreePool(AssociatedDevice->String.Buffer);
750  FreePool(AssociatedDevice);
751  }
752 
753  /* Free the rest of the buffers */
754  FreePool(DeviceInformation->SymbolicName.Buffer);
755  if (DeviceInformation->KeepLinks)
756  {
757  FreePool(DeviceInformation->UniqueId);
758  }
759  FreePool(DeviceInformation->DeviceName.Buffer);
760 
761  /* Finally, stop waiting for notifications for this device */
762  if (DeviceInformation->TargetDeviceNotificationEntry)
763  {
764  IoUnregisterPlugPlayNotification(DeviceInformation->TargetDeviceNotificationEntry);
765  }
766 }
767 
768 /*
769  * @implemented
770  */
771 VOID
773 {
774  PLIST_ENTRY NextEntry;
775  PSYMLINK_INFORMATION SymlinkInformation;
776 
777  /* For all the saved links */
778  while (!IsListEmpty(&(SavedLinkInformation->SymbolicLinksListHead)))
779  {
780  NextEntry = RemoveHeadList(&(SavedLinkInformation->SymbolicLinksListHead));
781  SymlinkInformation = CONTAINING_RECORD(NextEntry, SYMLINK_INFORMATION, SymbolicLinksListEntry);
782 
783  /* Remove from system & free */
784  GlobalDeleteSymbolicLink(&(SymlinkInformation->Name));
785  FreePool(SymlinkInformation->Name.Buffer);
786  FreePool(SymlinkInformation);
787  }
788 
789  /* And free unique ID & entry */
790  FreePool(SavedLinkInformation->UniqueId);
791  FreePool(SavedLinkInformation);
792 }
793 
794 
795 /*
796  * @implemented
797  */
798 VOID
799 NTAPI
801 {
802  PLIST_ENTRY NextEntry;
803  PUNIQUE_ID_WORK_ITEM WorkItem;
804  PDEVICE_EXTENSION DeviceExtension;
805  PDEVICE_INFORMATION DeviceInformation;
806  PSAVED_LINK_INFORMATION SavedLinkInformation;
807 
809 
810  /* Don't get notification any longer */
812 
813  /* Free registry buffer */
814  DeviceExtension = gdeviceObject->DeviceExtension;
815  if (DeviceExtension->RegistryPath.Buffer)
816  {
817  FreePool(DeviceExtension->RegistryPath.Buffer);
818  DeviceExtension->RegistryPath.Buffer = NULL;
819  }
820 
822 
824 
825  /* Wait for workers to finish */
826  if (InterlockedIncrement(&DeviceExtension->WorkerReferences) > 0)
827  {
828  KeReleaseSemaphore(&(DeviceExtension->WorkerSemaphore),
829  IO_NO_INCREMENT, 1, FALSE);
830 
832  }
833  else
834  {
835  InterlockedDecrement(&(DeviceExtension->WorkerReferences));
836  }
837 
838  /* Don't get any notification any longerĀ² */
839  IoUnregisterPlugPlayNotification(DeviceExtension->NotificationEntry);
840 
841  /* Acquire the driver exclusively */
842  KeWaitForSingleObject(&(DeviceExtension->DeviceLock), Executive, KernelMode,
843  FALSE, NULL);
844 
845  /* Clear offline devices list */
846  while (!IsListEmpty(&(DeviceExtension->OfflineDeviceListHead)))
847  {
848  NextEntry = RemoveHeadList(&(DeviceExtension->OfflineDeviceListHead));
849  DeviceInformation = CONTAINING_RECORD(NextEntry, DEVICE_INFORMATION, DeviceListEntry);
850  MountMgrFreeDeadDeviceInfo(DeviceInformation);
851  }
852 
853  /* Clear saved links list */
854  while (!IsListEmpty(&(DeviceExtension->SavedLinksListHead)))
855  {
856  NextEntry = RemoveHeadList(&(DeviceExtension->SavedLinksListHead));
857  SavedLinkInformation = CONTAINING_RECORD(NextEntry, SAVED_LINK_INFORMATION, SavedLinksListEntry);
858  MountMgrFreeSavedLink(SavedLinkInformation);
859  }
860 
861  /* Clear workers list */
862  while (!IsListEmpty(&(DeviceExtension->UniqueIdWorkerItemListHead)))
863  {
864  NextEntry = RemoveHeadList(&(DeviceExtension->UniqueIdWorkerItemListHead));
865  WorkItem = CONTAINING_RECORD(NextEntry, UNIQUE_ID_WORK_ITEM, UniqueIdWorkerItemListEntry);
866 
868  WorkItem->Event = &UnloadEvent;
869 
870  KeReleaseSemaphore(&(DeviceExtension->DeviceLock), IO_NO_INCREMENT,
871  1, FALSE);
872 
873  IoCancelIrp(WorkItem->Irp);
875 
876  IoFreeIrp(WorkItem->Irp);
877  FreePool(WorkItem->DeviceName.Buffer);
878  FreePool(WorkItem->IrpBuffer);
879  FreePool(WorkItem);
880 
881  KeWaitForSingleObject(&(DeviceExtension->DeviceLock), Executive, KernelMode,
882  FALSE, NULL);
883  }
884 
885  /* If we have drive letter data, release */
886  if (DeviceExtension->DriveLetterData)
887  {
888  FreePool(DeviceExtension->DriveLetterData);
889  DeviceExtension->DriveLetterData = NULL;
890  }
891 
892  /* Release driver & quit */
893  KeReleaseSemaphore(&(DeviceExtension->DeviceLock), IO_NO_INCREMENT, 1, FALSE);
894 
897 }
898 
899 /*
900  * @implemented
901  */
902 INIT_FUNCTION
903 BOOLEAN
905 {
907  ULONG Result, Default = 0;
909 
911 
912  /* Simply read data from register */
914  QueryTable[0].Name = L"NoAutoMount";
918  QueryTable[0].DefaultLength = sizeof(ULONG);
919 
922  QueryTable,
923  NULL,
924  NULL);
925  if (!NT_SUCCESS(Status))
926  {
927  return (Default != 0);
928  }
929 
930  return (Result != 0);
931 }
932 
933 /*
934  * @implemented
935  */
936 NTSTATUS
939  IN BOOLEAN ManuallyRegistered)
940 {
941  WCHAR Letter;
942  GUID StableGuid;
943  HANDLE LinkHandle;
944  ULONG SymLinkCount, i;
945  PLIST_ENTRY NextEntry;
946  PUNICODE_STRING SymLinks;
947  NTSTATUS Status, IntStatus;
949  PSYMLINK_INFORMATION SymlinkInformation;
950  PMOUNTDEV_UNIQUE_ID UniqueId, NewUniqueId;
951  PSAVED_LINK_INFORMATION SavedLinkInformation;
952  PDEVICE_INFORMATION DeviceInformation, CurrentDevice;
953  WCHAR CSymLinkBuffer[RTL_NUMBER_OF(Cunc)], LinkTargetBuffer[MAX_PATH];
954  UNICODE_STRING TargetDeviceName, SuggestedLinkName, DeviceName, VolumeName, DriveLetter, LinkTarget, CSymLink;
955  BOOLEAN HasGuid, HasGptDriveLetter, Valid, UseOnlyIfThereAreNoOtherLinks, IsDrvLetter, IsOff, IsVolumeName, LinkError;
956 
957  /* New device = new structure to represent it */
958  DeviceInformation = AllocatePool(sizeof(DEVICE_INFORMATION));
959  if (!DeviceInformation)
960  {
962  }
963 
964  /* Initialise device structure */
965  RtlZeroMemory(DeviceInformation, sizeof(DEVICE_INFORMATION));
966  InitializeListHead(&(DeviceInformation->SymbolicLinksListHead));
967  InitializeListHead(&(DeviceInformation->ReplicatedUniqueIdsListHead));
968  InitializeListHead(&(DeviceInformation->AssociatedDevicesHead));
969  DeviceInformation->SymbolicName.Length = SymbolicName->Length;
970  DeviceInformation->SymbolicName.MaximumLength = SymbolicName->Length + sizeof(UNICODE_NULL);
971  DeviceInformation->SymbolicName.Buffer = AllocatePool(DeviceInformation->SymbolicName.MaximumLength);
972  if (!DeviceInformation->SymbolicName.Buffer)
973  {
974  FreePool(DeviceInformation);
976  }
977 
978  /* Copy symbolic name */
980  DeviceInformation->SymbolicName.Buffer[DeviceInformation->SymbolicName.Length / sizeof(WCHAR)] = UNICODE_NULL;
981  DeviceInformation->ManuallyRegistered = ManuallyRegistered;
982  DeviceInformation->DeviceExtension = DeviceExtension;
983 
984  /* Query as much data as possible about device */
986  &TargetDeviceName,
987  &UniqueId,
988  &(DeviceInformation->Removable),
989  &HasGptDriveLetter,
990  &HasGuid,
991  &StableGuid,
992  &Valid);
993  if (!NT_SUCCESS(Status))
994  {
995  KeWaitForSingleObject(&(DeviceExtension->DeviceLock), Executive, KernelMode, FALSE, NULL);
996 
997  for (NextEntry = DeviceExtension->OfflineDeviceListHead.Flink;
998  NextEntry != &(DeviceExtension->OfflineDeviceListHead);
999  NextEntry = NextEntry->Flink)
1000  {
1001  CurrentDevice = CONTAINING_RECORD(NextEntry, DEVICE_INFORMATION, DeviceListEntry);
1002 
1003  if (RtlEqualUnicodeString(&(DeviceInformation->SymbolicName), &(CurrentDevice->SymbolicName), TRUE))
1004  {
1005  break;
1006  }
1007  }
1008 
1009  if (NextEntry != &(DeviceExtension->OfflineDeviceListHead))
1010  {
1011  MountMgrFreeDeadDeviceInfo(DeviceInformation);
1012  }
1013  else
1014  {
1015  InsertTailList(&(DeviceExtension->OfflineDeviceListHead), &(DeviceInformation->DeviceListEntry));
1016  }
1017 
1018  KeReleaseSemaphore(&(DeviceExtension->DeviceLock), IO_NO_INCREMENT, 1, FALSE);
1019 
1020  return Status;
1021  }
1022 
1023  /* Save gathered data */
1024  DeviceInformation->UniqueId = UniqueId;
1025  DeviceInformation->DeviceName = TargetDeviceName;
1026  DeviceInformation->KeepLinks = FALSE;
1027 
1028  /* If we found system partition, mark it */
1029  if (DeviceExtension->DriveLetterData && UniqueId->UniqueIdLength == DeviceExtension->DriveLetterData->UniqueIdLength)
1030  {
1031  if (RtlCompareMemory(UniqueId->UniqueId, DeviceExtension->DriveLetterData->UniqueId, UniqueId->UniqueIdLength)
1032  == UniqueId->UniqueIdLength)
1033  {
1034  IoSetSystemPartition(&TargetDeviceName);
1035  }
1036  }
1037 
1038  /* Check suggested link name */
1039  Status = QuerySuggestedLinkName(&(DeviceInformation->SymbolicName),
1040  &SuggestedLinkName,
1041  &UseOnlyIfThereAreNoOtherLinks);
1042  if (!NT_SUCCESS(Status))
1043  {
1044  SuggestedLinkName.Buffer = NULL;
1045  }
1046 
1047  /* If it's OK, set it and save its letter (if any) */
1048  if (SuggestedLinkName.Buffer && IsDriveLetter(&SuggestedLinkName))
1049  {
1050  DeviceInformation->SuggestedDriveLetter = (UCHAR)SuggestedLinkName.Buffer[LETTER_POSITION];
1051  }
1052 
1053  /* Acquire driver exclusively */
1054  KeWaitForSingleObject(&(DeviceExtension->DeviceLock), Executive, KernelMode, FALSE, NULL);
1055 
1056  /* Check if we already have device in to prevent double registration */
1057  for (NextEntry = DeviceExtension->DeviceListHead.Flink;
1058  NextEntry != &(DeviceExtension->DeviceListHead);
1059  NextEntry = NextEntry->Flink)
1060  {
1061  CurrentDevice = CONTAINING_RECORD(NextEntry, DEVICE_INFORMATION, DeviceListEntry);
1062 
1063  if (RtlEqualUnicodeString(&(CurrentDevice->DeviceName), &TargetDeviceName, TRUE))
1064  {
1065  break;
1066  }
1067  }
1068 
1069  /* If we found it, clear ours, and return success, all correct */
1070  if (NextEntry != &(DeviceExtension->DeviceListHead))
1071  {
1072  if (SuggestedLinkName.Buffer)
1073  {
1074  FreePool(SuggestedLinkName.Buffer);
1075  }
1076 
1077  FreePool(UniqueId);
1078  FreePool(TargetDeviceName.Buffer);
1079  FreePool(DeviceInformation->DeviceName.Buffer);
1080  FreePool(DeviceInformation);
1081 
1082  KeReleaseSemaphore(&(DeviceExtension->DeviceLock), IO_NO_INCREMENT, 1, FALSE);
1083 
1084  return STATUS_SUCCESS;
1085  }
1086 
1087  /* Check if there are symlinks associated with our device in registry */
1088  Status = QuerySymbolicLinkNamesFromStorage(DeviceExtension,
1089  DeviceInformation,
1090  (SuggestedLinkName.Buffer) ? &SuggestedLinkName : NULL,
1091  UseOnlyIfThereAreNoOtherLinks,
1092  &SymLinks,
1093  &SymLinkCount,
1094  HasGuid,
1095  &StableGuid);
1096 
1097  /* If our device is a CD-ROM */
1098  if (RtlPrefixUnicodeString(&DeviceCdRom, &TargetDeviceName, TRUE))
1099  {
1100  LinkTarget.Length = 0;
1101  LinkTarget.MaximumLength = sizeof(LinkTargetBuffer);
1102  LinkTarget.Buffer = LinkTargetBuffer;
1103 
1104  RtlCopyMemory(CSymLinkBuffer, Cunc, sizeof(Cunc));
1105  RtlInitUnicodeString(&CSymLink, CSymLinkBuffer);
1106 
1107  /* Start checking all letters that could have been associated */
1108  for (Letter = L'D'; Letter <= L'Z'; Letter++)
1109  {
1110  CSymLink.Buffer[Cunc_LETTER_POSITION] = Letter;
1111 
1113  &CSymLink,
1115  NULL,
1116  NULL);
1117 
1118  /* Try to open the associated symlink */
1120  if (!NT_SUCCESS(Status))
1121  {
1122  continue;
1123  }
1124 
1125  /* And query its target */
1126  Status = ZwQuerySymbolicLinkObject(LinkHandle, &LinkTarget, NULL);
1127  ZwClose(LinkHandle);
1128 
1129  if (!NT_SUCCESS(Status))
1130  {
1131  continue;
1132  }
1133 
1134  IntStatus = STATUS_UNSUCCESSFUL;
1135  if (!RtlEqualUnicodeString(&LinkTarget, &DeviceInformation->DeviceName, FALSE))
1136  {
1137  continue;
1138  }
1139 
1140  /* This link is matching our device, whereas it's not supposed to have any
1141  * symlink associated.
1142  * Delete it
1143  */
1144  if (!SymLinkCount)
1145  {
1146  IoDeleteSymbolicLink(&CSymLink);
1147  continue;
1148  }
1149 
1150  /* Now, for all the symlinks, check for ours */
1151  for (i = 0; i < SymLinkCount; i++)
1152  {
1153  if (IsDriveLetter(&(SymLinks[i])))
1154  {
1155  /* If it exists, that's correct */
1156  if (SymLinks[i].Buffer[LETTER_POSITION] == Letter)
1157  {
1158  IntStatus = STATUS_SUCCESS;
1159  }
1160  }
1161  }
1162 
1163  /* Useless link, delete it */
1164  if (IntStatus == STATUS_UNSUCCESSFUL)
1165  {
1166  IoDeleteSymbolicLink(&CSymLink);
1167  }
1168  }
1169  }
1170 
1171  /* Suggested name is no longer required */
1172  if (SuggestedLinkName.Buffer)
1173  {
1174  FreePool(SuggestedLinkName.Buffer);
1175  }
1176 
1177  /* If if failed, ensure we don't take symlinks into account */
1178  if (!NT_SUCCESS(Status))
1179  {
1180  SymLinks = NULL;
1181  SymLinkCount = 0;
1182  }
1183 
1184  /* Now we queried them, remove the symlinks */
1185  SavedLinkInformation = RemoveSavedLinks(DeviceExtension, UniqueId);
1186 
1187  IsDrvLetter = FALSE;
1188  IsOff = FALSE;
1189  IsVolumeName = FALSE;
1190  /* For all the symlinks */
1191  for (i = 0; i < SymLinkCount; i++)
1192  {
1193  /* Check if our device is a volume */
1194  if (MOUNTMGR_IS_VOLUME_NAME(&(SymLinks[i])))
1195  {
1196  IsVolumeName = TRUE;
1197  }
1198  /* If it has a drive letter */
1199  else if (IsDriveLetter(&(SymLinks[i])))
1200  {
1201  if (IsDrvLetter)
1202  {
1203  DeleteFromLocalDatabase(&(SymLinks[i]), UniqueId);
1204  continue;
1205  }
1206  else
1207  {
1208  IsDrvLetter = TRUE;
1209  }
1210  }
1211 
1212  /* And recreate the symlink to our device */
1213  Status = GlobalCreateSymbolicLink(&(SymLinks[i]), &TargetDeviceName);
1214  if (!NT_SUCCESS(Status))
1215  {
1216  LinkError = TRUE;
1217 
1218  if ((SavedLinkInformation && !RedirectSavedLink(SavedLinkInformation, &(SymLinks[i]), &TargetDeviceName)) ||
1219  !SavedLinkInformation)
1220  {
1221  Status = QueryDeviceInformation(&(SymLinks[i]), &DeviceName, NULL, NULL, NULL, NULL, NULL, NULL);
1222  if (NT_SUCCESS(Status))
1223  {
1224  LinkError = RtlEqualUnicodeString(&TargetDeviceName, &DeviceName, TRUE);
1225  FreePool(DeviceName.Buffer);
1226  }
1227 
1228  if (!LinkError)
1229  {
1230  if (IsDriveLetter(&(SymLinks[i])))
1231  {
1232  IsDrvLetter = FALSE;
1233  DeleteFromLocalDatabase(&(SymLinks[i]), UniqueId);
1234  }
1235 
1236  FreePool(SymLinks[i].Buffer);
1237  continue;
1238  }
1239  }
1240  }
1241 
1242  /* Check if was offline */
1243  if (IsOffline(&(SymLinks[i])))
1244  {
1245  IsOff = TRUE;
1246  }
1247 
1248  /* Finally, associate this symlink with the device */
1249  SymlinkInformation = AllocatePool(sizeof(SYMLINK_INFORMATION));
1250  if (!SymlinkInformation)
1251  {
1252  GlobalDeleteSymbolicLink(&(SymLinks[i]));
1253  FreePool(SymLinks[i].Buffer);
1254  continue;
1255  }
1256 
1257  SymlinkInformation->Name = SymLinks[i];
1258  SymlinkInformation->Online = TRUE;
1259 
1260  InsertTailList(&(DeviceInformation->SymbolicLinksListHead),
1261  &(SymlinkInformation->SymbolicLinksListEntry));
1262  }
1263 
1264  /* Now, for all the recreated symlinks, notify their recreation */
1265  for (NextEntry = DeviceInformation->SymbolicLinksListHead.Flink;
1266  NextEntry != &(DeviceInformation->SymbolicLinksListHead);
1267  NextEntry = NextEntry->Flink)
1268  {
1269  SymlinkInformation = CONTAINING_RECORD(NextEntry, SYMLINK_INFORMATION, SymbolicLinksListEntry);
1270 
1271  SendLinkCreated(&(SymlinkInformation->Name));
1272  }
1273 
1274  /* If we had saved links, it's time to free them */
1275  if (SavedLinkInformation)
1276  {
1277  MountMgrFreeSavedLink(SavedLinkInformation);
1278  }
1279 
1280  /* If our device doesn't have a volume name */
1281  if (!IsVolumeName)
1282  {
1283  /* It's time to create one */
1285  if (NT_SUCCESS(Status))
1286  {
1287  /* Write it to global database */
1289  DatabasePath,
1291  REG_BINARY,
1292  UniqueId->UniqueId,
1293  UniqueId->UniqueIdLength);
1294 
1295  /* And create the symlink */
1296  GlobalCreateSymbolicLink(&VolumeName, &TargetDeviceName);
1297 
1298  SymlinkInformation = AllocatePool(sizeof(SYMLINK_INFORMATION));
1299  if (!SymlinkInformation)
1300  {
1302  }
1303  /* Finally, associate it with the device and notify creation */
1304  else
1305  {
1306  SymlinkInformation->Name = VolumeName;
1307  SymlinkInformation->Online = TRUE;
1308  InsertTailList(&(DeviceInformation->SymbolicLinksListHead),
1309  &(SymlinkInformation->SymbolicLinksListEntry));
1310 
1312  }
1313  }
1314  }
1315 
1316  /* If we found a drive letter, then, ignore the suggested one */
1317  if (IsDrvLetter)
1318  {
1319  DeviceInformation->SuggestedDriveLetter = 0;
1320  }
1321  /* Else, it's time to set up one */
1322  else if ((DeviceExtension->NoAutoMount || DeviceInformation->Removable) &&
1323  DeviceExtension->AutomaticDriveLetter &&
1324  (HasGptDriveLetter || DeviceInformation->SuggestedDriveLetter) &&
1325  !HasNoDriveLetterEntry(UniqueId))
1326  {
1327  /* Create a new drive letter */
1328  Status = CreateNewDriveLetterName(&DriveLetter, &TargetDeviceName,
1329  DeviceInformation->SuggestedDriveLetter,
1330  NULL);
1331  if (!NT_SUCCESS(Status))
1332  {
1333  CreateNoDriveLetterEntry(UniqueId);
1334  }
1335  else
1336  {
1337  /* Save it to global database */
1339  DatabasePath,
1340  DriveLetter.Buffer,
1341  REG_BINARY,
1342  UniqueId->UniqueId,
1343  UniqueId->UniqueIdLength);
1344 
1345  /* Associate it with the device and notify creation */
1346  SymlinkInformation = AllocatePool(sizeof(SYMLINK_INFORMATION));
1347  if (!SymlinkInformation)
1348  {
1349  FreePool(DriveLetter.Buffer);
1350  }
1351  else
1352  {
1353  SymlinkInformation->Name = DriveLetter;
1354  SymlinkInformation->Online = TRUE;
1355  InsertTailList(&(DeviceInformation->SymbolicLinksListHead),
1356  &(SymlinkInformation->SymbolicLinksListEntry));
1357 
1358  SendLinkCreated(&DriveLetter);
1359  }
1360  }
1361  }
1362 
1363  /* If that's a PnP device, register for notifications */
1364  if (!ManuallyRegistered)
1365  {
1366  RegisterForTargetDeviceNotification(DeviceExtension, DeviceInformation);
1367  }
1368 
1369  /* Finally, insert the device into our devices list */
1370  InsertTailList(&(DeviceExtension->DeviceListHead), &(DeviceInformation->DeviceListEntry));
1371 
1372  /* Copy device unique ID */
1373  NewUniqueId = AllocatePool(UniqueId->UniqueIdLength + sizeof(MOUNTDEV_UNIQUE_ID));
1374  if (NewUniqueId)
1375  {
1376  NewUniqueId->UniqueIdLength = UniqueId->UniqueIdLength;
1377  RtlCopyMemory(NewUniqueId->UniqueId, UniqueId->UniqueId, UniqueId->UniqueIdLength);
1378  }
1379 
1380  /* If device's offline or valid, skip its notifications */
1381  if (IsOff || Valid)
1382  {
1383  DeviceInformation->SkipNotifications = TRUE;
1384  }
1385 
1386  /* In case device is valid and is set to no automount,
1387  * set it offline.
1388  */
1389  if (DeviceExtension->NoAutoMount || IsDrvLetter)
1390  {
1391  IsOff = !DeviceInformation->SkipNotifications;
1392  }
1393  else
1394  {
1395  IsOff = FALSE;
1396  }
1397 
1398  /* Finally, release the exclusive lock */
1399  KeReleaseSemaphore(&(DeviceExtension->DeviceLock), IO_NO_INCREMENT, 1, FALSE);
1400 
1401  /* If device is not offline, notify its arrival */
1402  if (!IsOff)
1403  {
1405  }
1406 
1407  /* If we had symlinks (from storage), free them */
1408  if (SymLinks)
1409  {
1410  FreePool(SymLinks);
1411  }
1412 
1413  /* Notify about unique id change */
1414  if (NewUniqueId)
1415  {
1416  IssueUniqueIdChangeNotify(DeviceExtension, SymbolicName, NewUniqueId);
1417  FreePool(NewUniqueId);
1418  }
1419 
1420  /* If this drive was set to have a drive letter automatically
1421  * Now it's back, local databases sync will be required
1422  */
1423  if (DeviceExtension->AutomaticDriveLetter)
1424  {
1425  KeWaitForSingleObject(&(DeviceExtension->DeviceLock), Executive, KernelMode, FALSE, NULL);
1426 
1427  ReconcileThisDatabaseWithMaster(DeviceExtension, DeviceInformation);
1428 
1429  NextEntry = DeviceExtension->DeviceListHead.Flink;
1430  CurrentDevice = CONTAINING_RECORD(NextEntry, DEVICE_INFORMATION, DeviceListEntry);
1431  while (CurrentDevice != DeviceInformation)
1432  {
1433  if (!CurrentDevice->NoDatabase)
1434  {
1435  ReconcileThisDatabaseWithMaster(DeviceExtension, CurrentDevice);
1436  }
1437 
1438  NextEntry = NextEntry->Flink;
1439  CurrentDevice = CONTAINING_RECORD(NextEntry, DEVICE_INFORMATION, DeviceListEntry);
1440  }
1441 
1442  KeReleaseSemaphore(&(DeviceExtension->DeviceLock), IO_NO_INCREMENT, 1, FALSE);
1443  }
1444 
1445  return STATUS_SUCCESS;
1446 }
1447 
1448 /*
1449  * @implemented
1450  */
1451 VOID
1454 {
1455  PLIST_ENTRY NextEntry, DeviceEntry;
1456  PUNIQUE_ID_REPLICATE UniqueIdReplicate;
1457  PSYMLINK_INFORMATION SymlinkInformation;
1458  PASSOCIATED_DEVICE_ENTRY AssociatedDevice;
1459  PSAVED_LINK_INFORMATION SavedLinkInformation = NULL;
1460  PDEVICE_INFORMATION DeviceInformation, CurrentDevice;
1461 
1462  /* Acquire device exclusively */
1463  KeWaitForSingleObject(&(DeviceExtension->DeviceLock), Executive, KernelMode, FALSE, NULL);
1464 
1465  /* Look for the leaving device */
1466  for (NextEntry = DeviceExtension->DeviceListHead.Flink;
1467  NextEntry != &(DeviceExtension->DeviceListHead);
1468  NextEntry = NextEntry->Flink)
1469  {
1470  DeviceInformation = CONTAINING_RECORD(NextEntry, DEVICE_INFORMATION, DeviceListEntry);
1471 
1472  if (!RtlCompareUnicodeString(&(DeviceInformation->SymbolicName), DeviceName, TRUE))
1473  {
1474  break;
1475  }
1476  }
1477 
1478  /* If we found it */
1479  if (NextEntry != &(DeviceExtension->DeviceListHead))
1480  {
1481  /* If it's asked to keep links, then, prepare to save them */
1482  if (DeviceInformation->KeepLinks)
1483  {
1484  SavedLinkInformation = AllocatePool(sizeof(SAVED_LINK_INFORMATION));
1485  if (!SavedLinkInformation)
1486  {
1487  DeviceInformation->KeepLinks = FALSE;
1488  }
1489  }
1490 
1491  /* If it's possible (and asked), start to save them */
1492  if (DeviceInformation->KeepLinks)
1493  {
1494  InsertTailList(&(DeviceExtension->SavedLinksListHead), &(SavedLinkInformation->SavedLinksListEntry));
1495  InitializeListHead(&(SavedLinkInformation->SymbolicLinksListHead));
1496  SavedLinkInformation->UniqueId = DeviceInformation->UniqueId;
1497  }
1498 
1499  /* For all the symlinks */
1500  while (!IsListEmpty(&(DeviceInformation->SymbolicLinksListHead)))
1501  {
1502  NextEntry = RemoveHeadList(&(DeviceInformation->SymbolicLinksListHead));
1503  SymlinkInformation = CONTAINING_RECORD(NextEntry, SYMLINK_INFORMATION, SymbolicLinksListEntry);
1504 
1505  /* If we have to, save the link */
1506  if (DeviceInformation->KeepLinks)
1507  {
1508  InsertTailList(&(SavedLinkInformation->SymbolicLinksListHead), &(SymlinkInformation->SymbolicLinksListEntry));
1509  }
1510  /* Otherwise, just release it */
1511  else
1512  {
1513  GlobalDeleteSymbolicLink(&(SymlinkInformation->Name));
1514  FreePool(SymlinkInformation->Name.Buffer);
1515  FreePool(SymlinkInformation);
1516  }
1517  }
1518 
1519  /* Free all the replicated unique IDs */
1520  while (!IsListEmpty(&(DeviceInformation->ReplicatedUniqueIdsListHead)))
1521  {
1522  NextEntry = RemoveHeadList(&(DeviceInformation->ReplicatedUniqueIdsListHead));
1523  UniqueIdReplicate = CONTAINING_RECORD(NextEntry, UNIQUE_ID_REPLICATE, ReplicatedUniqueIdsListEntry);
1524 
1525 
1526  FreePool(UniqueIdReplicate->UniqueId);
1527  FreePool(UniqueIdReplicate);
1528  }
1529 
1530  while (!IsListEmpty(&(DeviceInformation->AssociatedDevicesHead)))
1531  {
1532  NextEntry = RemoveHeadList(&(DeviceInformation->AssociatedDevicesHead));
1533  AssociatedDevice = CONTAINING_RECORD(NextEntry, ASSOCIATED_DEVICE_ENTRY, AssociatedDevicesEntry);
1534 
1535  DeviceInformation->NoDatabase = TRUE;
1536  FreePool(AssociatedDevice->String.Buffer);
1537  FreePool(AssociatedDevice);
1538  }
1539 
1540  /* Remove device from the device list */
1541  RemoveEntryList(&(DeviceInformation->DeviceListEntry));
1542 
1543  /* If there are still devices, check if some were associated with ours */
1544  if (!IsListEmpty(&(DeviceInformation->DeviceListEntry)))
1545  {
1546  for (NextEntry = DeviceExtension->DeviceListHead.Flink;
1547  NextEntry != &(DeviceExtension->DeviceListHead);
1548  NextEntry = NextEntry->Flink)
1549  {
1550  CurrentDevice = CONTAINING_RECORD(NextEntry, DEVICE_INFORMATION, DeviceListEntry);
1551 
1552  /* And then, remove them */
1553  DeviceEntry = CurrentDevice->AssociatedDevicesHead.Flink;
1554  while (DeviceEntry != &(CurrentDevice->AssociatedDevicesHead))
1555  {
1556  AssociatedDevice = CONTAINING_RECORD(NextEntry, ASSOCIATED_DEVICE_ENTRY, AssociatedDevicesEntry);
1557  DeviceEntry = DeviceEntry->Flink;
1558 
1559  if (AssociatedDevice->DeviceInformation != DeviceInformation)
1560  {
1561  continue;
1562  }
1563 
1564  RemoveEntryList(&(AssociatedDevice->AssociatedDevicesEntry));
1565  FreePool(AssociatedDevice->String.Buffer);
1566  FreePool(AssociatedDevice);
1567  }
1568  }
1569  }
1570 
1571  /* Finally, clean up device name, symbolic name */
1572  FreePool(DeviceInformation->SymbolicName.Buffer);
1573  if (!DeviceInformation->KeepLinks)
1574  {
1575  FreePool(DeviceInformation->UniqueId);
1576  }
1577  FreePool(DeviceInformation->DeviceName.Buffer);
1578 
1579  /* Unregister notifications */
1580  if (DeviceInformation->TargetDeviceNotificationEntry)
1581  {
1583  }
1584 
1585  /* And leave */
1586  FreePool(DeviceInformation);
1587  }
1588  else
1589  {
1590  /* We didn't find device, perhaps because it was offline */
1591  for (NextEntry = DeviceExtension->OfflineDeviceListHead.Flink;
1592  NextEntry != &(DeviceExtension->OfflineDeviceListHead);
1593  NextEntry = NextEntry->Flink)
1594  {
1595  DeviceInformation = CONTAINING_RECORD(NextEntry, DEVICE_INFORMATION, DeviceListEntry);
1596 
1597  /* It was, remove it */
1598  if (RtlCompareUnicodeString(&(DeviceInformation->SymbolicName), DeviceName, TRUE) == 0)
1599  {
1600  RemoveEntryList(&(DeviceInformation->DeviceListEntry));
1601  MountMgrFreeDeadDeviceInfo(DeviceInformation);
1602  break;
1603  }
1604  }
1605  }
1606 
1607  /* Release driver */
1608  KeReleaseSemaphore(&(DeviceExtension->DeviceLock), IO_NO_INCREMENT, 1, FALSE);
1609 }
1610 
1611 /*
1612  * @implemented
1613  */
1614 NTSTATUS
1615 NTAPI
1617  IN PVOID Context)
1618 {
1619  BOOLEAN OldState;
1620  PDEVICE_EXTENSION DeviceExtension;
1622 
1623  /* Notification for a device arrived */
1624  /* Disable hard errors */
1627 
1628  DeviceExtension = Context;
1629  Notification = NotificationStructure;
1630 
1631  /* Dispatch according to the event */
1632  if (IsEqualGUID(&(Notification->Event), &GUID_DEVICE_INTERFACE_ARRIVAL))
1633  {
1634  MountMgrMountedDeviceArrival(DeviceExtension, Notification->SymbolicLinkName, FALSE);
1635  }
1636  else if (IsEqualGUID(&(Notification->Event), &GUID_DEVICE_INTERFACE_REMOVAL))
1637  {
1638  MountMgrMountedDeviceRemoval(DeviceExtension, Notification->SymbolicLinkName);
1639  }
1640 
1641  /* Reset hard errors */
1643 
1644  return STATUS_SUCCESS;
1645 }
1646 
1647 /*
1648  * @implemented
1649  */
1650 NTSTATUS
1651 NTAPI
1653  IN PIRP Irp)
1654 {
1655  PIO_STACK_LOCATION Stack;
1657 
1659 
1661 
1662  /* Allow driver opening for communication
1663  * as long as it's not taken for a directory
1664  */
1665  if (Stack->MajorFunction == IRP_MJ_CREATE &&
1666  Stack->Parameters.Create.Options & FILE_DIRECTORY_FILE)
1667  {
1669  }
1670 
1671  Irp->IoStatus.Status = Status;
1672  Irp->IoStatus.Information = 0;
1674  return Status;
1675 }
1676 
1677 /*
1678  * @implemented
1679  */
1680 VOID
1681 NTAPI
1683  IN PIRP Irp)
1684 {
1686 
1687  RemoveEntryList(&(Irp->Tail.Overlay.ListEntry));
1688 
1689  IoReleaseCancelSpinLock(Irp->CancelIrql);
1690 
1691  Irp->IoStatus.Information = 0;
1692  Irp->IoStatus.Status = STATUS_CANCELLED;
1694 }
1695 
1696 /*
1697  * @implemented
1698  */
1699 NTSTATUS
1700 NTAPI
1702  IN PIRP Irp)
1703 {
1704  PIRP ListIrp;
1705  KIRQL OldIrql;
1706  PLIST_ENTRY NextEntry;
1708  PIO_STACK_LOCATION Stack;
1709  PDEVICE_EXTENSION DeviceExtension;
1710 
1711  DeviceExtension = DeviceObject->DeviceExtension;
1713  FileObject = Stack->FileObject;
1714 
1716 
1717  /* If IRP list if empty, it's OK */
1718  if (IsListEmpty(&(DeviceExtension->IrpListHead)))
1719  {
1721 
1722  Irp->IoStatus.Status = STATUS_SUCCESS;
1723  Irp->IoStatus.Information = 0;
1725 
1726  return STATUS_SUCCESS;
1727  }
1728 
1729  /* Otherwise, cancel all the IRPs */
1730  NextEntry = DeviceExtension->IrpListHead.Flink;
1731  do
1732  {
1733  ListIrp = CONTAINING_RECORD(NextEntry, IRP, Tail.Overlay.ListEntry);
1735  {
1736  ListIrp->Cancel = TRUE;
1737  ListIrp->CancelIrql = OldIrql;
1738  ListIrp->CancelRoutine = NULL;
1739  MountMgrCancel(DeviceObject, ListIrp);
1740 
1742  }
1743 
1744  NextEntry = NextEntry->Flink;
1745  }
1746  while (NextEntry != &(DeviceExtension->IrpListHead));
1747 
1749 
1750  Irp->IoStatus.Status = STATUS_SUCCESS;
1751  Irp->IoStatus.Information = 0;
1753 
1754  return STATUS_SUCCESS;
1755 }
1756 
1757 /*
1758  * @implemented
1759  */
1760 NTSTATUS
1761 NTAPI
1763  IN PIRP Irp)
1764 {
1765  PDEVICE_EXTENSION DeviceExtension;
1766 
1767  DeviceExtension = DeviceObject->DeviceExtension;
1768 
1770 
1772 
1773  /* Wait for workers */
1774  if (InterlockedIncrement(&(DeviceExtension->WorkerReferences)) > 0)
1775  {
1776  KeReleaseSemaphore(&(DeviceExtension->WorkerSemaphore),
1778  1,
1779  FALSE);
1781  }
1782  else
1783  {
1784  InterlockedDecrement(&(DeviceExtension->WorkerReferences));
1785  }
1786 
1787  Irp->IoStatus.Status = STATUS_SUCCESS;
1788  Irp->IoStatus.Information = 0;
1790 
1791  return STATUS_SUCCESS;
1792 }
1793 
1794 /* FUNCTIONS ****************************************************************/
1795 
1796 INIT_FUNCTION
1797 NTSTATUS
1798 NTAPI
1801 {
1802  NTSTATUS Status;
1804  PDEVICE_EXTENSION DeviceExtension;
1805 
1807 
1809  sizeof(DEVICE_EXTENSION),
1810  &DeviceMount,
1813  FALSE,
1814  &DeviceObject);
1815  if (!NT_SUCCESS(Status))
1816  {
1817  return Status;
1818  }
1819 
1821 
1822  DeviceExtension = DeviceObject->DeviceExtension;
1823  RtlZeroMemory(DeviceExtension, sizeof(DEVICE_EXTENSION));
1824  DeviceExtension->DeviceObject = DeviceObject;
1825  DeviceExtension->DriverObject = DriverObject;
1826 
1827  InitializeListHead(&(DeviceExtension->DeviceListHead));
1828  InitializeListHead(&(DeviceExtension->OfflineDeviceListHead));
1829 
1830  KeInitializeSemaphore(&(DeviceExtension->DeviceLock), 1, 1);
1831  KeInitializeSemaphore(&(DeviceExtension->RemoteDatabaseLock), 1, 1);
1832 
1833  InitializeListHead(&(DeviceExtension->IrpListHead));
1834  DeviceExtension->EpicNumber = 1;
1835 
1836  InitializeListHead(&(DeviceExtension->SavedLinksListHead));
1837 
1838  InitializeListHead(&(DeviceExtension->WorkerQueueListHead));
1839  KeInitializeSemaphore(&(DeviceExtension->WorkerSemaphore), 0, MAXLONG);
1840  DeviceExtension->WorkerReferences = -1;
1841  KeInitializeSpinLock(&(DeviceExtension->WorkerLock));
1842 
1843  InitializeListHead(&(DeviceExtension->UniqueIdWorkerItemListHead));
1844  InitializeListHead(&(DeviceExtension->OnlineNotificationListHead));
1845  DeviceExtension->OnlineNotificationCount = 1;
1846 
1847  DeviceExtension->RegistryPath.Length = RegistryPath->Length;
1848  DeviceExtension->RegistryPath.MaximumLength = RegistryPath->Length + sizeof(WCHAR);
1849  DeviceExtension->RegistryPath.Buffer = AllocatePool(DeviceExtension->RegistryPath.MaximumLength);
1850  if (!DeviceExtension->RegistryPath.Buffer)
1851  {
1854  }
1855 
1856  RtlCopyUnicodeString(&(DeviceExtension->RegistryPath), RegistryPath);
1857 
1858  DeviceExtension->NoAutoMount = MountmgrReadNoAutoMount(&(DeviceExtension->RegistryPath));
1859 
1861 
1862  /* Register for device arrival & removal. Ask to be notified for already
1863  * present devices
1864  */
1868  DriverObject,
1870  DeviceExtension,
1871  &(DeviceExtension->NotificationEntry));
1872 
1873  if (!NT_SUCCESS(Status))
1874  {
1876  return Status;
1877  }
1878 
1884 
1886 
1888  if (!NT_SUCCESS(Status))
1889  {
1891  }
1892 
1893  return Status;
1894 }
_In_ PVOID NotificationStructure
Definition: iofuncs.h:1203
NTSTATUS NTAPI IoUnregisterPlugPlayNotification(IN PVOID NotificationEntry)
Definition: pnpnotify.c:371
IN PUNICODE_STRING IN POBJECT_ATTRIBUTES ObjectAttributes
Definition: conport.c:35
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PMOUNTDEV_UNIQUE_ID UniqueId
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_In_ PCWSTR _Inout_ _At_ QueryTable _Pre_unknown_ PRTL_QUERY_REGISTRY_TABLE QueryTable
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#define IN
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VOID MountMgrFreeMountedDeviceInfo(IN PDEVICE_INFORMATION DeviceInformation)
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USHORT MaximumLength
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_In_ PIRP Irp
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#define UNREFERENCED_PARAMETER(P)
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KEVENT UnloadEvent
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_In_ PNDIS_STRING _In_ PNDIS_STRING SymbolicName
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IRP
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GLsizei GLenum const GLvoid GLsizei GLenum GLbyte GLbyte GLbyte GLdouble GLdouble GLdouble GLfloat GLfloat GLfloat GLint GLint GLint GLshort GLshort GLshort GLubyte GLubyte GLubyte GLuint GLuint GLuint GLushort GLushort GLushort GLbyte GLbyte GLbyte GLbyte GLdouble GLdouble GLdouble GLdouble GLfloat GLfloat GLfloat GLfloat GLint GLint GLint GLint GLshort GLshort GLshort GLshort GLubyte GLubyte GLubyte GLubyte GLuint GLuint GLuint GLuint GLushort GLushort GLushort GLushort GLboolean const GLdouble const GLfloat const GLint const GLshort const GLbyte const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLdouble const GLfloat const GLfloat const GLint const GLint const GLshort const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort GLenum GLenum GLenum GLfloat GLenum GLint GLenum GLenum GLenum GLfloat GLenum GLenum GLint GLenum GLfloat GLenum GLint GLint GLushort GLenum GLenum GLfloat GLenum GLenum GLint GLfloat const GLubyte GLenum GLenum GLenum const GLfloat GLenum GLenum const GLint GLenum GLint GLint GLsizei GLsizei GLint GLenum GLenum const GLvoid GLenum GLenum const GLfloat GLenum GLenum const GLint GLenum GLenum const GLdouble GLenum GLenum const GLfloat GLenum GLenum const GLint GLsizei GLuint GLfloat GLuint GLbitfield GLfloat GLint GLuint GLboolean GLenum GLfloat GLenum GLbitfield GLenum GLfloat GLfloat GLint GLint const GLfloat GLenum GLfloat GLfloat GLint GLint GLfloat GLfloat GLint GLint const GLfloat GLint GLfloat GLfloat GLint GLfloat GLfloat GLint GLfloat GLfloat const GLdouble const GLfloat const GLdouble const GLfloat GLint i
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_In_ PVOID _In_ ULONG Event
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struct _MOUNTDEV_NAME MOUNTDEV_NAME
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_At_(*)(_In_ PWSK_CLIENT Client, _In_opt_ PUNICODE_STRING NodeName, _In_opt_ PUNICODE_STRING ServiceName, _In_opt_ ULONG NameSpace, _In_opt_ GUID *Provider, _In_opt_ PADDRINFOEXW Hints, _Outptr_ PADDRINFOEXW *Result, _In_opt_ PEPROCESS OwningProcess, _In_opt_ PETHREAD OwningThread, _Inout_ PIRP Irp Result)(Mem)) NTSTATUS(WSKAPI *PFN_WSK_GET_ADDRESS_INFO
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PDEVICE_EXTENSION DeviceExtension
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_Inout_ PFILE_OBJECT FileObject
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PFLT_MESSAGE_WAITER_QUEUE CONTAINING_RECORD(Csq, DEVICE_EXTENSION, IrpQueue)) -> WaiterQ.mLock) _IRQL_raises_(DISPATCH_LEVEL) VOID NTAPI FltpAcquireMessageWaiterLock(_In_ PIO_CSQ Csq, _Out_ PKIRQL Irql)
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struct _MOUNTDEV_UNIQUE_ID MOUNTDEV_UNIQUE_ID
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struct _DeviceInfo DeviceInfo
_In_ ULONG _In_ struct _SET_PARTITION_INFORMATION_EX * PartitionInfo
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NTSYSAPI NTSTATUS WINAPI RtlQueryRegistryValues(ULONG, PCWSTR, PRTL_QUERY_REGISTRY_TABLE, PVOID, PVOID)
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* PFILE_OBJECT
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NTSYSAPI NTSTATUS WINAPI RtlWriteRegistryValue(ULONG, PCWSTR, PCWSTR, ULONG, PVOID, ULONG)
#define IRP_MJ_CLOSE
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static const WCHAR L[]
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_Requires_lock_held_ Interrupt _Releases_lock_ Interrupt _In_ _IRQL_restores_ KIRQL OldIrql
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PDRIVER_UNLOAD DriverUnload
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WCHAR Letter
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IN PVOID IN PVOID IN USHORT IN USHORT Size
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#define RTL_REGISTRY_ABSOLUTE
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__drv_aliasesMem FORCEINLINE PIO_STACK_LOCATION IoGetNextIrpStackLocation(_In_ PIRP Irp)
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BOOLEAN ManuallyRegistered
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UNICODE_STRING String
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#define InterlockedExchange
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Definition: util.c:150
Status
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DRIVER_DISPATCH MountMgrDeviceControl
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IN PDEVICE_OBJECT DeviceObject
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__drv_aliasesMem FORCEINLINE PIO_STACK_LOCATION IoGetCurrentIrpStackLocation(_In_ PIRP Irp)
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#define STATUS_BUFFER_OVERFLOW
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NTSTATUS NTAPI MountMgrMountedDeviceNotification(IN PVOID NotificationStructure, IN PVOID Context)
Definition: mountmgr.c:1616
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unsigned short USHORT
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#define RTL_NUMBER_OF(x)
Definition: RtlRegistry.c:12
NTSTATUS GlobalCreateSymbolicLink(IN PUNICODE_STRING DosName, IN PUNICODE_STRING DeviceName)
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static OUT PIO_STATUS_BLOCK IoStatusBlock
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BOOL WINAPI IsEqualGUID(REFGUID rguid1, REFGUID rguid2)
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NTSTATUS NTAPI IoCallDriver(IN PDEVICE_OBJECT DeviceObject, IN PIRP Irp)
Definition: irp.c:1218
NTSYSAPI BOOLEAN NTAPI RtlPrefixUnicodeString(IN PUNICODE_STRING String1, IN PUNICODE_STRING String2, IN BOOLEAN CaseInSensitive)
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Definition: irp.c:881
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Definition: mntmgr.h:50
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Definition: irp.c:1101
NTSTATUS NTAPI IoRegisterShutdownNotification(PDEVICE_OBJECT DeviceObject)
Definition: device.c:1694
_Must_inspect_result_ _Inout_opt_ PUNICODE_STRING VolumeName
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#define IRP_MJ_CLEANUP
INIT_FUNCTION BOOLEAN MountmgrReadNoAutoMount(IN PUNICODE_STRING RegistryPath)
Definition: mountmgr.c:904
NTSTATUS NTAPI MountMgrCleanup(IN PDEVICE_OBJECT DeviceObject, IN PIRP Irp)
Definition: mountmgr.c:1701
#define OUT
Definition: typedefs.h:39
VOID NTAPI IoFreeIrp(IN PIRP Irp)
Definition: irp.c:1666
PDRIVER_DISPATCH MajorFunction[IRP_MJ_MAXIMUM_FUNCTION+1]
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struct tagContext Context
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unsigned int ULONG
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#define IO_NO_INCREMENT
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#define SYMBOLIC_LINK_QUERY
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Definition: device.c:1031
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Definition: mntmgr.h:47
NTSYSAPI VOID NTAPI RtlInitUnicodeString(PUNICODE_STRING DestinationString, PCWSTR SourceString)
#define RtlZeroMemory(Destination, Length)
Definition: typedefs.h:261
#define InitializeObjectAttributes(p, n, a, r, s)
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_In_ PUNICODE_STRING RegistryPath
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VOID NTAPI MountMgrUnload(IN struct _DRIVER_OBJECT *DriverObject)
Definition: mountmgr.c:800
PVOID TargetDeviceNotificationEntry
Definition: mntmgr.h:61
#define FILE_DEVICE_SECURE_OPEN
Definition: cdrw_usr.h:46
NTSTATUS QueryDeviceInformation(IN PUNICODE_STRING SymbolicName, OUT PUNICODE_STRING DeviceName OPTIONAL, OUT PMOUNTDEV_UNIQUE_ID *UniqueId OPTIONAL, OUT PBOOLEAN Removable OPTIONAL, OUT PBOOLEAN GptDriveLetter OPTIONAL, OUT PBOOLEAN HasGuid OPTIONAL, IN OUT LPGUID StableGuid OPTIONAL, OUT PBOOLEAN Valid OPTIONAL)
Definition: mountmgr.c:195
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Definition: database.c:32
#define REG_NONE
Definition: nt_native.h:1492
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Definition: symlink.c:160
struct _NAMED_PIPE_CREATE_PARAMETERS * Parameters
Definition: iotypes.h:2772
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Definition: eventobj.c:22
return STATUS_SUCCESS
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#define REG_DWORD
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PMOUNTDEV_UNIQUE_ID UniqueId
Definition: mntmgr.h:49
#define OBJ_KERNEL_HANDLE
Definition: winternl.h:231
VOID IssueUniqueIdChangeNotify(IN PDEVICE_EXTENSION DeviceExtension, IN PUNICODE_STRING DeviceName, IN PMOUNTDEV_UNIQUE_ID UniqueId)
Definition: notify.c:661
#define IOCTL_VOLUME_GET_GPT_ATTRIBUTES
Definition: ntddvol.h:56
NTSYSAPI BOOLEAN NTAPI RtlEqualUnicodeString(PUNICODE_STRING String1, PUNICODE_STRING String2, BOOLEAN CaseInSensitive)
UCHAR UniqueId[1]
Definition: imports.h:139
#define Cunc_LETTER_POSITION
Definition: mountmgr.c:45
UCHAR SuggestedDriveLetter
Definition: mntmgr.h:52
HRESULT Create([out]ITransactionReceiver **ppReceiver)
LONG Unloading
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NTSYSAPI NTSTATUS NTAPI ZwOpenSymbolicLinkObject(_Out_ PHANDLE SymbolicLinkHandle, _In_ ACCESS_MASK DesiredAccess, _In_ POBJECT_ATTRIBUTES ObjectAttributes)
#define RTL_QUERY_REGISTRY_DIRECT
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#define RtlCompareMemory(s1, s2, l)
Definition: env_spec_w32.h:465
#define IOCTL_DISK_GET_PARTITION_INFO_EX
Definition: ntddk_ex.h:206
Definition: arc.h:81
#define IRP_MJ_DEVICE_CONTROL
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UNICODE_STRING DeviceCdRom
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Definition: symlink.c:827
GUID MountedDevicesGuid
Definition: mountmgr.c:38
PULONG MinorVersion OPTIONAL
Definition: CrossNt.h:68