dlls/mountmgr.sys/mountmgr.c

   1 /*
   2  * Mount manager service implementation
   3  *
   4  * Copyright 2008 Alexandre Julliard
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #include <stdarg.h>
  22 #include <unistd.h>
  23
  24 #define NONAMELESSUNION
  25 #define NONAMELESSSTRUCT
  26
  27 #include "ntstatus.h"
  28 #define WIN32_NO_STATUS
  29 #include "windef.h"
  30 #include "winbase.h"
  31 #include "winternl.h"
  32 #include "winioctl.h"
  33 #include "winreg.h"
  34 #include "ntddstor.h"
  35 #include "ntddcdrm.h"
  36 #include "ddk/wdm.h"
  37 #include "ddk/mountmgr.h"
  38 #include "wine/library.h"
  39 #include "wine/unicode.h"
  40 #include "wine/debug.h"
  41 #include "mountmgr.h"
  42
  43 WINE_DEFAULT_DEBUG_CHANNEL(mountmgr);
  44
  45 #define MAX_DOS_DRIVES 26
  46 #define MAX_MOUNT_POINTS (2 * MAX_DOS_DRIVES)
  47
  48 /* extra info for disk devices, stored in DeviceExtension */
  49 struct disk_device_info
  50 {
  51     UNICODE_STRING        name;     /* device name */
  52     STORAGE_DEVICE_NUMBER devnum;   /* device number info */
  53 };
  54
  55 struct mount_point
  56 {
  57     DEVICE_OBJECT *device;
  58     UNICODE_STRING link;    /* DOS device symlink */
  59     void          *id;      /* device unique id */
  60     unsigned int   id_len;
  61 };
  62
  63 static struct mount_point mount_points[MAX_MOUNT_POINTS];
  64 static HKEY mount_key;
  65
  66 static inline UNICODE_STRING *get_device_name( DEVICE_OBJECT *dev )
  67 {
  68     return &((struct disk_device_info *)dev->DeviceExtension)->name;
  69 }
  70
  71 /* read a Unix symlink; returned buffer must be freed by caller */
  72 static char *read_symlink( const char *path )
  73 {
  74     char *buffer;
  75     int ret, size = 128;
  76
  77     for (;;)
  78     {
  79         if (!(buffer = RtlAllocateHeap( GetProcessHeap(), 0, size )))
  80         {
  81             SetLastError( ERROR_NOT_ENOUGH_MEMORY );
  82             return 0;
  83         }
  84         ret = readlink( path, buffer, size );
  85         if (ret == -1)
  86         {
  87             RtlFreeHeap( GetProcessHeap(), 0, buffer );
  88             return 0;
  89         }
  90         if (ret != size)
  91         {
  92             buffer[ret] = 0;
  93             return buffer;
  94         }
  95         RtlFreeHeap( GetProcessHeap(), 0, buffer );
  96         size *= 2;
  97     }
  98 }
  99
 100 static NTSTATUS create_disk_device( DRIVER_OBJECT *driver, DWORD type, DEVICE_OBJECT **dev_obj )
 101 {
 102     static const WCHAR harddiskW[] = {'\\','D','e','v','i','c','e',
 103                                       '\\','H','a','r','d','d','i','s','k','V','o','l','u','m','e','%','u',0};
 104     static const WCHAR cdromW[] = {'\\','D','e','v','i','c','e','\\','C','d','R','o','m','%','u',0};
 105     static const WCHAR floppyW[] = {'\\','D','e','v','i','c','e','\\','F','l','o','p','p','y','%','u',0};
 106
 107     UINT i, first = 0;
 108     NTSTATUS status = 0;
 109     const WCHAR *format;
 110     UNICODE_STRING name;
 111     struct disk_device_info *info;
 112
 113     switch(type)
 114     {
 115     case DRIVE_REMOVABLE:
 116         format = floppyW;
 117         break;
 118     case DRIVE_CDROM:
 119         format = cdromW;
 120         break;
 121     case DRIVE_FIXED:
 122     default:  /* FIXME */
 123         format = harddiskW;
 124         first = 1;  /* harddisk volumes start counting from 1 */
 125         break;
 126     }
 127
 128     name.MaximumLength = (strlenW(format) + 10) * sizeof(WCHAR);
 129     name.Buffer = RtlAllocateHeap( GetProcessHeap(), 0, name.MaximumLength );
 130     for (i = first; i < 32; i++)
 131     {
 132         sprintfW( name.Buffer, format, i );
 133         name.Length = strlenW(name.Buffer) * sizeof(WCHAR);
 134         status = IoCreateDevice( driver, sizeof(*info), &name, 0, 0, FALSE, dev_obj );
 135         if (status != STATUS_OBJECT_NAME_COLLISION) break;
 136     }
 137     if (!status)
 138     {
 139         info = (*dev_obj)->DeviceExtension;
 140         info->name = name;
 141         switch(type)
 142         {
 143         case DRIVE_REMOVABLE:
 144             info->devnum.DeviceType = FILE_DEVICE_DISK;
 145             info->devnum.DeviceNumber = i;
 146             info->devnum.PartitionNumber = ~0u;
 147             break;
 148         case DRIVE_CDROM:
 149             info->devnum.DeviceType = FILE_DEVICE_CD_ROM;
 150             info->devnum.DeviceNumber = i;
 151             info->devnum.PartitionNumber = ~0u;
 152             break;
 153         case DRIVE_FIXED:
 154         default:  /* FIXME */
 155             info->devnum.DeviceType = FILE_DEVICE_DISK;
 156             info->devnum.DeviceNumber = 0;
 157             info->devnum.PartitionNumber = i;
 158             break;
 159         }
 160     }
 161     else
 162     {
 163         FIXME( "IoCreateDevice %s got %x\n", debugstr_w(name.Buffer), status );
 164         RtlFreeUnicodeString( &name );
 165     }
 166     return status;
 167 }
 168
 169
 170 static NTSTATUS add_mount_point( DRIVER_OBJECT *driver, DWORD type, int drive,
 171                                  const void *id, unsigned int id_len )
 172 {
 173     static const WCHAR driveW[] = {'\\','D','o','s','D','e','v','i','c','e','s','\\','%','c',':',0};
 174     static const WCHAR volumeW[] = {'\\','?','?','\\','V','o','l','u','m','e','{',
 175                                     '%','0','8','x','-','%','0','4','x','-','%','0','4','x','-',
 176                                     '%','0','2','x','%','0','2','x','-','%','0','2','x','%','0','2','x',
 177                                     '%','0','2','x','%','0','2','x','%','0','2','x','%','0','2','x','}',0};
 178     WCHAR *drive_link, *volume_link;
 179     NTSTATUS status;
 180     GUID guid;
 181     UINT i;
 182     struct mount_point *mount_drive = NULL, *mount_volume = NULL;
 183
 184     /* find two free mount points */
 185
 186     for (i = 0; i < MAX_MOUNT_POINTS; i++)
 187     {
 188         if (mount_points[i].device) continue;
 189         if (!mount_drive)
 190         {
 191             mount_drive = &mount_points[i];
 192             continue;
 193         }
 194         mount_volume = &mount_points[i];
 195         break;
 196     }
 197     if (!mount_volume) return STATUS_NO_MEMORY;
 198
 199     /* create the volume */
 200
 201     memset( &guid, 0, sizeof(guid) );  /* FIXME */
 202     guid.Data4[7] = 'A' + drive;
 203
 204     drive_link = RtlAllocateHeap( GetProcessHeap(), 0, sizeof(driveW) );
 205     volume_link = RtlAllocateHeap( GetProcessHeap(), 0, sizeof(volumeW) );
 206     sprintfW( drive_link, driveW, 'A' + drive );
 207     sprintfW( volume_link, volumeW, guid.Data1, guid.Data2, guid.Data3,
 208               guid.Data4[0], guid.Data4[1], guid.Data4[2], guid.Data4[3],
 209               guid.Data4[4], guid.Data4[5], guid.Data4[6], guid.Data4[7]);
 210
 211     RtlInitUnicodeString( &mount_drive->link, drive_link );
 212     RtlInitUnicodeString( &mount_volume->link, volume_link );
 213     status = create_disk_device( driver, type, &mount_drive->device );
 214     if (status)
 215     {
 216         RtlFreeUnicodeString( &mount_drive->link );
 217         RtlFreeUnicodeString( &mount_volume->link );
 218         return status;
 219     }
 220
 221     mount_volume->device = mount_drive->device;  /* FIXME: incr ref count */
 222     mount_drive->id = RtlAllocateHeap( GetProcessHeap(), 0, id_len );
 223     mount_drive->id_len = id_len;
 224     memcpy( mount_drive->id, id, id_len );
 225     mount_volume->id = RtlAllocateHeap( GetProcessHeap(), 0, id_len );
 226     mount_volume->id_len = id_len;
 227     memcpy( mount_volume->id, id, id_len );
 228
 229     IoCreateSymbolicLink( &mount_drive->link, get_device_name(mount_drive->device) );
 230     IoCreateSymbolicLink( &mount_volume->link, get_device_name(mount_volume->device) );
 231
 232     TRACE( "created device %s symlinks %s %s\n", debugstr_w(get_device_name(mount_drive->device)->Buffer),
 233            debugstr_w(mount_drive->link.Buffer), debugstr_w(mount_volume->link.Buffer) );
 234
 235     RegSetValueExW( mount_key, mount_drive->link.Buffer, 0, REG_BINARY,
 236                     mount_drive->id, mount_drive->id_len );
 237     RegSetValueExW( mount_key, mount_volume->link.Buffer, 0, REG_BINARY,
 238                     mount_volume->id, mount_volume->id_len );
 239
 240     return STATUS_SUCCESS;
 241 }
 242
 243 /* check if a given mount point matches the requested specs */
 244 static BOOL matching_mount_point( const struct mount_point *mount, const MOUNTMGR_MOUNT_POINT *spec )
 245 {
 246     if (spec->SymbolicLinkNameOffset)
 247     {
 248         const WCHAR *name = (const WCHAR *)((const char *)spec + spec->SymbolicLinkNameOffset);
 249         if (spec->SymbolicLinkNameLength != mount->link.Length) return FALSE;
 250         if (memicmpW( name, mount->link.Buffer, mount->link.Length/sizeof(WCHAR)))
 251             return FALSE;
 252     }
 253     if (spec->DeviceNameOffset)
 254     {
 255         const WCHAR *name = (const WCHAR *)((const char *)spec + spec->DeviceNameOffset);
 256         const UNICODE_STRING *dev_name = get_device_name( mount->device );
 257         if (spec->DeviceNameLength != dev_name->Length) return FALSE;
 258         if (memicmpW( name, dev_name->Buffer, dev_name->Length/sizeof(WCHAR)))
 259             return FALSE;
 260     }
 261     if (spec->UniqueIdOffset)
 262     {
 263         const void *id = ((const char *)spec + spec->UniqueIdOffset);
 264         if (spec->UniqueIdLength != mount->id_len) return FALSE;
 265         if (memcmp( id, mount->id, mount->id_len )) return FALSE;
 266     }
 267     return TRUE;
 268 }
 269
 270 /* implementation of IOCTL_MOUNTMGR_QUERY_POINTS */
 271 static NTSTATUS query_mount_points( const void *in_buff, SIZE_T insize,
 272                                     void *out_buff, SIZE_T outsize, IO_STATUS_BLOCK *iosb )
 273 {
 274     UINT i, j, pos, size;
 275     const MOUNTMGR_MOUNT_POINT *input = in_buff;
 276     MOUNTMGR_MOUNT_POINTS *info = out_buff;
 277     UNICODE_STRING *dev_name;
 278
 279     /* sanity checks */
 280     if (input->SymbolicLinkNameOffset + input->SymbolicLinkNameLength > insize ||
 281         input->UniqueIdOffset + input->UniqueIdLength > insize ||
 282         input->DeviceNameOffset + input->DeviceNameLength > insize ||
 283         input->SymbolicLinkNameOffset + input->SymbolicLinkNameLength < input->SymbolicLinkNameOffset ||
 284         input->UniqueIdOffset + input->UniqueIdLength < input->UniqueIdOffset ||
 285         input->DeviceNameOffset + input->DeviceNameLength < input->DeviceNameOffset)
 286         return STATUS_INVALID_PARAMETER;
 287
 288     for (i = j = size = 0; i < MAX_MOUNT_POINTS; i++)
 289     {
 290         if (!mount_points[i].device) continue;
 291         if (!matching_mount_point( &mount_points[i], input )) continue;
 292         size += get_device_name(mount_points[i].device)->Length;
 293         size += mount_points[i].link.Length;
 294         j++;
 295     }
 296     pos = FIELD_OFFSET( MOUNTMGR_MOUNT_POINTS, MountPoints[j] );
 297     size += pos;
 298
 299     if (size > outsize)
 300     {
 301         if (size >= sizeof(info->Size)) info->Size = size;
 302         iosb->Information = sizeof(info->Size);
 303         return STATUS_MORE_ENTRIES;
 304     }
 305
 306     info->NumberOfMountPoints = j;
 307     for (i = j = 0; i < MAX_MOUNT_POINTS; i++)
 308     {
 309         if (!mount_points[i].device) continue;
 310         if (!matching_mount_point( &mount_points[i], input )) continue;
 311         info->MountPoints[j].UniqueIdOffset = 0;  /* FIXME */
 312         info->MountPoints[j].UniqueIdLength = 0;
 313
 314         dev_name = get_device_name( mount_points[i].device );
 315         info->MountPoints[j].DeviceNameOffset = pos;
 316         info->MountPoints[j].DeviceNameLength = dev_name->Length;
 317         memcpy( (char *)out_buff + pos, dev_name->Buffer, dev_name->Length );
 318         pos += dev_name->Length;
 319
 320         info->MountPoints[j].SymbolicLinkNameOffset = pos;
 321         info->MountPoints[j].SymbolicLinkNameLength = mount_points[i].link.Length;
 322         memcpy( (char *)out_buff + pos, mount_points[i].link.Buffer, mount_points[i].link.Length );
 323         pos += mount_points[i].link.Length;
 324         j++;
 325     }
 326     info->Size = pos;
 327     iosb->Information = pos;
 328     return STATUS_SUCCESS;
 329 }
 330
 331 /* handler for ioctls on the mount manager device */
 332 static NTSTATUS WINAPI mountmgr_ioctl( DEVICE_OBJECT *device, IRP *irp )
 333 {
 334     IO_STACK_LOCATION *irpsp = irp->Tail.Overlay.s.u.CurrentStackLocation;
 335
 336     TRACE( "ioctl %x insize %u outsize %u\n",
 337            irpsp->Parameters.DeviceIoControl.IoControlCode,
 338            irpsp->Parameters.DeviceIoControl.InputBufferLength,
 339            irpsp->Parameters.DeviceIoControl.OutputBufferLength );
 340
 341     switch(irpsp->Parameters.DeviceIoControl.IoControlCode)
 342     {
 343     case IOCTL_MOUNTMGR_QUERY_POINTS:
 344         if (irpsp->Parameters.DeviceIoControl.InputBufferLength < sizeof(MOUNTMGR_MOUNT_POINT))
 345             return STATUS_INVALID_PARAMETER;
 346         irp->IoStatus.u.Status = query_mount_points( irpsp->Parameters.DeviceIoControl.Type3InputBuffer,
 347                                                      irpsp->Parameters.DeviceIoControl.InputBufferLength,
 348                                                      irp->MdlAddress->StartVa,
 349                                                      irpsp->Parameters.DeviceIoControl.OutputBufferLength,
 350                                                      &irp->IoStatus );
 351         break;
 352     default:
 353         FIXME( "ioctl %x not supported\n", irpsp->Parameters.DeviceIoControl.IoControlCode );
 354         irp->IoStatus.u.Status = STATUS_NOT_SUPPORTED;
 355         break;
 356     }
 357     return irp->IoStatus.u.Status;
 358 }
 359
 360 /* handler for ioctls on the harddisk device */
 361 static NTSTATUS WINAPI harddisk_ioctl( DEVICE_OBJECT *device, IRP *irp )
 362 {
 363     IO_STACK_LOCATION *irpsp = irp->Tail.Overlay.s.u.CurrentStackLocation;
 364     struct disk_device_info *disk_info = device->DeviceExtension;
 365
 366     TRACE( "ioctl %x insize %u outsize %u\n",
 367            irpsp->Parameters.DeviceIoControl.IoControlCode,
 368            irpsp->Parameters.DeviceIoControl.InputBufferLength,
 369            irpsp->Parameters.DeviceIoControl.OutputBufferLength );
 370
 371     switch(irpsp->Parameters.DeviceIoControl.IoControlCode)
 372     {
 373     case IOCTL_DISK_GET_DRIVE_GEOMETRY:
 374     {
 375         DISK_GEOMETRY info;
 376         DWORD len = min( sizeof(info), irpsp->Parameters.DeviceIoControl.OutputBufferLength );
 377
 378         info.Cylinders.QuadPart = 10000;
 379         info.MediaType = (disk_info->devnum.DeviceType == FILE_DEVICE_DISK) ? FixedMedia : RemovableMedia;
 380         info.TracksPerCylinder = 255;
 381         info.SectorsPerTrack = 63;
 382         info.BytesPerSector = 512;
 383         memcpy( irp->MdlAddress->StartVa, &info, len );
 384         irp->IoStatus.Information = len;
 385         irp->IoStatus.u.Status = STATUS_SUCCESS;
 386         break;
 387     }
 388     case IOCTL_STORAGE_GET_DEVICE_NUMBER:
 389     {
 390         DWORD len = min( sizeof(disk_info->devnum), irpsp->Parameters.DeviceIoControl.OutputBufferLength );
 391
 392         memcpy( irp->MdlAddress->StartVa, &disk_info->devnum, len );
 393         irp->IoStatus.Information = len;
 394         irp->IoStatus.u.Status = STATUS_SUCCESS;
 395         break;
 396     }
 397     case IOCTL_CDROM_READ_TOC:
 398         irp->IoStatus.u.Status = STATUS_INVALID_DEVICE_REQUEST;
 399         break;
 400     default:
 401         FIXME( "unsupported ioctl %x\n", irpsp->Parameters.DeviceIoControl.IoControlCode );
 402         irp->IoStatus.u.Status = STATUS_NOT_SUPPORTED;
 403         break;
 404     }
 405     return irp->IoStatus.u.Status;
 406 }
 407
 408 /* create mount points for mapped drives */
 409 static void create_drive_mount_points( DRIVER_OBJECT *driver )
 410 {
 411     const char *config_dir = wine_get_config_dir();
 412     char *buffer, *p, *link;
 413     unsigned int i;
 414
 415     if ((buffer = RtlAllocateHeap( GetProcessHeap(), 0,
 416                                    strlen(config_dir) + sizeof("/dosdevices/a:") )))
 417     {
 418         strcpy( buffer, config_dir );
 419         strcat( buffer, "/dosdevices/a:" );
 420         p = buffer + strlen(buffer) - 2;
 421
 422         for (i = 0; i < MAX_DOS_DRIVES; i++)
 423         {
 424             *p = 'a' + i;
 425             if (!(link = read_symlink( buffer ))) continue;
 426             add_mount_point( driver, DRIVE_FIXED, i, link, strlen(link) + 1 );
 427             RtlFreeHeap( GetProcessHeap(), 0, link );
 428         }
 429         RtlFreeHeap( GetProcessHeap(), 0, buffer );
 430     }
 431 }
 432
 433 /* driver entry point for the harddisk driver */
 434 static NTSTATUS WINAPI harddisk_driver_entry( DRIVER_OBJECT *driver, UNICODE_STRING *path )
 435 {
 436     static const WCHAR mounted_devicesW[] = {'S','y','s','t','e','m','\\',
 437                                              'M','o','u','n','t','e','d','D','e','v','i','c','e','s',0};
 438     static const WCHAR harddisk0W[] = {'\\','D','e','v','i','c','e',
 439                                        '\\','H','a','r','d','d','i','s','k','0',0};
 440     static const WCHAR physdrive0W[] = {'\\','?','?','\\','P','h','y','s','i','c','a','l','D','r','i','v','e','0',0};
 441
 442     UNICODE_STRING nameW, linkW;
 443     DEVICE_OBJECT *device;
 444     NTSTATUS status;
 445     struct disk_device_info *info;
 446
 447     driver->MajorFunction[IRP_MJ_DEVICE_CONTROL] = harddisk_ioctl;
 448
 449     RegCreateKeyExW( HKEY_LOCAL_MACHINE, mounted_devicesW, 0, NULL,
 450                      REG_OPTION_VOLATILE, KEY_ALL_ACCESS, NULL, &mount_key, NULL );
 451
 452     RtlInitUnicodeString( &nameW, harddisk0W );
 453     RtlInitUnicodeString( &linkW, physdrive0W );
 454     if (!(status = IoCreateDevice( driver, sizeof(*info), &nameW, 0, 0, FALSE, &device )))
 455         status = IoCreateSymbolicLink( &linkW, &nameW );
 456     if (status)
 457     {
 458         FIXME( "failed to create device error %x\n", status );
 459         return status;
 460     }
 461     info = device->DeviceExtension;
 462     info->name = nameW;
 463     info->devnum.DeviceType = FILE_DEVICE_DISK;
 464     info->devnum.DeviceNumber = 0;
 465     info->devnum.PartitionNumber = 0;
 466
 467     create_drive_mount_points( driver );
 468
 469     return status;
 470 }
 471
 472 /* main entry point for the mount point manager driver */
 473 NTSTATUS WINAPI DriverEntry( DRIVER_OBJECT *driver, UNICODE_STRING *path )
 474 {
 475     static const WCHAR device_mountmgrW[] = {'\\','D','e','v','i','c','e','\\','M','o','u','n','t','P','o','i','n','t','M','a','n','a','g','e','r',0};
 476     static const WCHAR link_mountmgrW[] = {'\\','?','?','\\','M','o','u','n','t','P','o','i','n','t','M','a','n','a','g','e','r',0};
 477     static const WCHAR harddiskW[] = {'\\','D','r','i','v','e','r','\\','H','a','r','d','d','i','s','k',0};
 478
 479     UNICODE_STRING nameW, linkW;
 480     DEVICE_OBJECT *device;
 481     NTSTATUS status;
 482
 483     TRACE( "%s\n", debugstr_w(path->Buffer) );
 484
 485     driver->MajorFunction[IRP_MJ_DEVICE_CONTROL] = mountmgr_ioctl;
 486
 487     RtlInitUnicodeString( &nameW, device_mountmgrW );
 488     RtlInitUnicodeString( &linkW, link_mountmgrW );
 489     if (!(status = IoCreateDevice( driver, 0, &nameW, 0, 0, FALSE, &device )))
 490         status = IoCreateSymbolicLink( &linkW, &nameW );
 491     if (status)
 492     {
 493         FIXME( "failed to create device error %x\n", status );
 494         return status;
 495     }
 496
 497     initialize_hal();
 498     initialize_diskarbitration();
 499
 500     RtlInitUnicodeString( &nameW, harddiskW );
 501     status = IoCreateDriver( &nameW, harddisk_driver_entry );
 502
 503     return status;
 504 }