reactos/drivers/filesystems/ntfs/finfo.c

   1 /*
   2  *  ReactOS kernel
   3  *  Copyright (C) 2002 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/ntfs/dirctl.c
  22  * PURPOSE:          NTFS filesystem driver
  23  * PROGRAMMERS:      Eric Kohl
  24  *                   Hervé Poussineau (hpoussin@reactos.org)
  25  */
  26
  27 /* INCLUDES *****************************************************************/
  28
  29 #include "ntfs.h"
  30
  31 #define NDEBUG
  32 #include <debug.h>
  33
  34 /* FUNCTIONS ****************************************************************/
  35
  36 /*
  37  * FUNCTION: Retrieve the standard file information
  38  */
  39 static
  40 NTSTATUS
  41 NtfsGetStandardInformation(PNTFS_FCB Fcb,
  42                            PDEVICE_OBJECT DeviceObject,
  43                            PFILE_STANDARD_INFORMATION StandardInfo,
  44                            PULONG BufferLength)
  45 {
  46     UNREFERENCED_PARAMETER(DeviceObject);
  47
  48     DPRINT("NtfsGetStandardInformation() called\n");
  49
  50     if (*BufferLength < sizeof(FILE_STANDARD_INFORMATION))
  51         return STATUS_BUFFER_OVERFLOW;
  52
  53     /* PRECONDITION */
  54     ASSERT(StandardInfo != NULL);
  55     ASSERT(Fcb != NULL);
  56
  57     RtlZeroMemory(StandardInfo,
  58                   sizeof(FILE_STANDARD_INFORMATION));
  59
  60     StandardInfo->AllocationSize = Fcb->RFCB.AllocationSize;
  61     StandardInfo->EndOfFile = Fcb->RFCB.FileSize;
  62     StandardInfo->NumberOfLinks = 0;
  63     StandardInfo->DeletePending = FALSE;
  64     StandardInfo->Directory = NtfsFCBIsDirectory(Fcb);
  65
  66     *BufferLength -= sizeof(FILE_STANDARD_INFORMATION);
  67
  68     return STATUS_SUCCESS;
  69 }
  70
  71
  72 static
  73 NTSTATUS
  74 NtfsGetPositionInformation(PFILE_OBJECT FileObject,
  75                            PFILE_POSITION_INFORMATION PositionInfo,
  76                            PULONG BufferLength)
  77 {
  78     UNREFERENCED_PARAMETER(FileObject);
  79
  80     DPRINT("NtfsGetPositionInformation() called\n");
  81
  82     if (*BufferLength < sizeof(FILE_POSITION_INFORMATION))
  83         return STATUS_BUFFER_OVERFLOW;
  84
  85     PositionInfo->CurrentByteOffset.QuadPart = 0;
  86 //    FileObject->CurrentByteOffset.QuadPart;
  87
  88     DPRINT("Getting position %I64x\n",
  89            PositionInfo->CurrentByteOffset.QuadPart);
  90
  91     *BufferLength -= sizeof(FILE_POSITION_INFORMATION);
  92
  93     return STATUS_SUCCESS;
  94 }
  95
  96
  97 static
  98 NTSTATUS
  99 NtfsGetBasicInformation(PFILE_OBJECT FileObject,
 100                         PNTFS_FCB Fcb,
 101                         PDEVICE_OBJECT DeviceObject,
 102                         PFILE_BASIC_INFORMATION BasicInfo,
 103                         PULONG BufferLength)
 104 {
 105     DPRINT("NtfsGetBasicInformation() called\n");
 106
 107     if (*BufferLength < sizeof(FILE_BASIC_INFORMATION))
 108         return STATUS_BUFFER_OVERFLOW;
 109
 110 #if 0
 111     CdfsDateTimeToFileTime(Fcb,
 112                            &BasicInfo->CreationTime);
 113     CdfsDateTimeToFileTime(Fcb,
 114                            &BasicInfo->LastAccessTime);
 115     CdfsDateTimeToFileTime(Fcb,
 116                            &BasicInfo->LastWriteTime);
 117     CdfsDateTimeToFileTime(Fcb,
 118                            &BasicInfo->ChangeTime);
 119
 120     CdfsFileFlagsToAttributes(Fcb,
 121                               &BasicInfo->FileAttributes);
 122 #else
 123     UNREFERENCED_PARAMETER(FileObject);
 124     UNREFERENCED_PARAMETER(Fcb);
 125     UNREFERENCED_PARAMETER(DeviceObject);
 126     UNREFERENCED_PARAMETER(BasicInfo);
 127 #endif
 128
 129     *BufferLength -= sizeof(FILE_BASIC_INFORMATION);
 130
 131     return STATUS_SUCCESS;
 132 }
 133
 134
 135 /*
 136  * FUNCTION: Retrieve the file name information
 137  */
 138 static
 139 NTSTATUS
 140 NtfsGetNameInformation(PFILE_OBJECT FileObject,
 141                        PNTFS_FCB Fcb,
 142                        PDEVICE_OBJECT DeviceObject,
 143                        PFILE_NAME_INFORMATION NameInfo,
 144                        PULONG BufferLength)
 145 {
 146     ULONG BytesToCopy;
 147
 148     UNREFERENCED_PARAMETER(FileObject);
 149     UNREFERENCED_PARAMETER(DeviceObject);
 150
 151     DPRINT("NtfsGetNameInformation() called\n");
 152
 153     ASSERT(NameInfo != NULL);
 154     ASSERT(Fcb != NULL);
 155
 156     /* If buffer can't hold at least the file name length, bail out */
 157     if (*BufferLength < (ULONG)FIELD_OFFSET(FILE_NAME_INFORMATION, FileName[0]))
 158         return STATUS_BUFFER_OVERFLOW;
 159
 160     /* Save file name length, and as much file len, as buffer length allows */
 161     NameInfo->FileNameLength = wcslen(Fcb->PathName) * sizeof(WCHAR);
 162
 163     /* Calculate amount of bytes to copy not to overflow the buffer */
 164     BytesToCopy = min(NameInfo->FileNameLength,
 165                       *BufferLength - FIELD_OFFSET(FILE_NAME_INFORMATION, FileName[0]));
 166
 167     /* Fill in the bytes */
 168     RtlCopyMemory(NameInfo->FileName, Fcb->PathName, BytesToCopy);
 169
 170     /* Check if we could write more but are not able to */
 171     if (*BufferLength < NameInfo->FileNameLength + (ULONG)FIELD_OFFSET(FILE_NAME_INFORMATION, FileName[0]))
 172     {
 173         /* Return number of bytes written */
 174         *BufferLength -= FIELD_OFFSET(FILE_NAME_INFORMATION, FileName[0]) + BytesToCopy;
 175         return STATUS_BUFFER_OVERFLOW;
 176     }
 177
 178     /* We filled up as many bytes, as needed */
 179     *BufferLength -= (FIELD_OFFSET(FILE_NAME_INFORMATION, FileName[0]) + NameInfo->FileNameLength);
 180
 181     return STATUS_SUCCESS;
 182 }
 183
 184
 185 static
 186 NTSTATUS
 187 NtfsGetInternalInformation(PNTFS_FCB Fcb,
 188                            PFILE_INTERNAL_INFORMATION InternalInfo,
 189                            PULONG BufferLength)
 190 {
 191     DPRINT("NtfsGetInternalInformation() called\n");
 192
 193     ASSERT(InternalInfo);
 194     ASSERT(Fcb);
 195
 196     if (*BufferLength < sizeof(FILE_INTERNAL_INFORMATION))
 197         return STATUS_BUFFER_OVERFLOW;
 198
 199     /* FIXME: get a real index, that can be used in a create operation */
 200     InternalInfo->IndexNumber.QuadPart = 0;
 201
 202     *BufferLength -= sizeof(FILE_INTERNAL_INFORMATION);
 203
 204     return STATUS_SUCCESS;
 205 }
 206
 207
 208 /*
 209  * FUNCTION: Retrieve the specified file information
 210  */
 211 NTSTATUS
 212 NTAPI
 213 NtfsFsdQueryInformation(PDEVICE_OBJECT DeviceObject,
 214                         PIRP Irp)
 215 {
 216     FILE_INFORMATION_CLASS FileInformationClass;
 217     PIO_STACK_LOCATION Stack;
 218     PFILE_OBJECT FileObject;
 219     PNTFS_FCB Fcb;
 220     PVOID SystemBuffer;
 221     ULONG BufferLength;
 222     NTSTATUS Status = STATUS_SUCCESS;
 223
 224     DPRINT("NtfsQueryInformation() called\n");
 225
 226     Stack = IoGetCurrentIrpStackLocation(Irp);
 227     FileInformationClass = Stack->Parameters.QueryFile.FileInformationClass;
 228     FileObject = Stack->FileObject;
 229     Fcb = FileObject->FsContext;
 230
 231     SystemBuffer = Irp->AssociatedIrp.SystemBuffer;
 232     BufferLength = Stack->Parameters.QueryFile.Length;
 233
 234     switch (FileInformationClass)
 235     {
 236         case FileStandardInformation:
 237             Status = NtfsGetStandardInformation(Fcb,
 238                                                 DeviceObject,
 239                                                 SystemBuffer,
 240                                                 &BufferLength);
 241             break;
 242
 243         case FilePositionInformation:
 244             Status = NtfsGetPositionInformation(FileObject,
 245                                                 SystemBuffer,
 246                                                 &BufferLength);
 247             break;
 248
 249         case FileBasicInformation:
 250             Status = NtfsGetBasicInformation(FileObject,
 251                                              Fcb,
 252                                              DeviceObject,
 253                                              SystemBuffer,
 254                                              &BufferLength);
 255             break;
 256
 257         case FileNameInformation:
 258             Status = NtfsGetNameInformation(FileObject,
 259                                       Fcb,
 260                                       DeviceObject,
 261                                       SystemBuffer,
 262                                       &BufferLength);
 263             break;
 264
 265         case FileInternalInformation:
 266             Status = NtfsGetInternalInformation(Fcb,
 267                                                 SystemBuffer,
 268                                                 &BufferLength);
 269             break;
 270
 271         case FileAlternateNameInformation:
 272         case FileAllInformation:
 273             Status = STATUS_NOT_IMPLEMENTED;
 274             break;
 275
 276         default:
 277             DPRINT("Unimplemented information class %u\n", FileInformationClass);
 278             Status = STATUS_INVALID_PARAMETER;
 279     }
 280
 281     Irp->IoStatus.Status = Status;
 282
 283     if (NT_SUCCESS(Status))
 284         Irp->IoStatus.Information =
 285             Stack->Parameters.QueryFile.Length - BufferLength;
 286     else
 287         Irp->IoStatus.Information = 0;
 288
 289     IoCompleteRequest(Irp, IO_NO_INCREMENT);
 290
 291     return Status;
 292 }
 293
 294 /* EOF */