dlls/mountmgr.sys/device.c

   1 /*
   2  * Dynamic devices support
   3  *
   4  * Copyright 2006 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 "config.h"
  22 #include "wine/port.h"
  23
  24 #include <assert.h>
  25 #include <errno.h>
  26 #include <stdarg.h>
  27 #include <stdio.h>
  28 #include <sys/time.h>
  29
  30 #include "mountmgr.h"
  31 #include "winreg.h"
  32 #include "winuser.h"
  33 #include "dbt.h"
  34
  35 #include "wine/library.h"
  36 #include "wine/list.h"
  37 #include "wine/unicode.h"
  38 #include "wine/debug.h"
  39
  40 WINE_DEFAULT_DEBUG_CHANNEL(mountmgr);
  41
  42 #define MAX_DOS_DRIVES 26
  43
  44 static const WCHAR drive_types[][8] =
  45 {
  46     { 0 },                           /* DEVICE_UNKNOWN */
  47     { 0 },                           /* DEVICE_HARDDISK */
  48     {'h','d',0},                     /* DEVICE_HARDDISK_VOL */
  49     {'f','l','o','p','p','y',0},     /* DEVICE_FLOPPY */
  50     {'c','d','r','o','m',0},         /* DEVICE_CDROM */
  51     {'n','e','t','w','o','r','k',0}, /* DEVICE_NETWORK */
  52     {'r','a','m','d','i','s','k',0}  /* DEVICE_RAMDISK */
  53 };
  54
  55 static const WCHAR drives_keyW[] = {'S','o','f','t','w','a','r','e','\\',
  56                                     'W','i','n','e','\\','D','r','i','v','e','s',0};
  57
  58 struct disk_device
  59 {
  60     enum device_type      type;        /* drive type */
  61     DEVICE_OBJECT        *dev_obj;     /* disk device allocated for this volume */
  62     UNICODE_STRING        name;        /* device name */
  63     UNICODE_STRING        symlink;     /* device symlink if any */
  64     STORAGE_DEVICE_NUMBER devnum;      /* device number info */
  65     char                 *unix_device; /* unix device path */
  66     char                 *unix_mount;  /* unix mount point path */
  67 };
  68
  69 struct volume
  70 {
  71     struct list           entry;       /* entry in volumes list */
  72     struct disk_device   *device;      /* disk device */
  73     char                 *udi;         /* unique identifier for dynamic volumes */
  74     unsigned int          ref;         /* ref count */
  75     GUID                  guid;        /* volume uuid */
  76     struct mount_point   *mount;       /* Volume{xxx} mount point */
  77 };
  78
  79 struct dos_drive
  80 {
  81     struct list           entry;       /* entry in drives list */
  82     struct volume        *volume;      /* volume for this drive */
  83     int                   drive;       /* drive letter (0 = A: etc.) */
  84     struct mount_point   *mount;       /* DosDevices mount point */
  85 };
  86
  87 static struct list drives_list = LIST_INIT(drives_list);
  88 static struct list volumes_list = LIST_INIT(volumes_list);
  89
  90 static DRIVER_OBJECT *harddisk_driver;
  91
  92 static CRITICAL_SECTION device_section;
  93 static CRITICAL_SECTION_DEBUG critsect_debug =
  94 {
  95     0, 0, &device_section,
  96     { &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList },
  97       0, 0, { (DWORD_PTR)(__FILE__ ": device_section") }
  98 };
  99 static CRITICAL_SECTION device_section = { &critsect_debug, -1, 0, 0, 0, 0 };
 100
 101 static char *get_dosdevices_path( char **drive )
 102 {
 103     const char *config_dir = wine_get_config_dir();
 104     size_t len = strlen(config_dir) + sizeof("/dosdevices/a::");
 105     char *path = HeapAlloc( GetProcessHeap(), 0, len );
 106     if (path)
 107     {
 108         strcpy( path, config_dir );
 109         strcat( path, "/dosdevices/a::" );
 110         *drive = path + len - 4;
 111     }
 112     return path;
 113 }
 114
 115 static char *strdupA( const char *str )
 116 {
 117     char *ret;
 118
 119     if (!str) return NULL;
 120     if ((ret = RtlAllocateHeap( GetProcessHeap(), 0, strlen(str) + 1 ))) strcpy( ret, str );
 121     return ret;
 122 }
 123
 124 static const GUID *get_default_uuid( int letter )
 125 {
 126     static GUID guid;
 127
 128     guid.Data4[7] = 'A' + letter;
 129     return &guid;
 130 }
 131
 132 /* read a Unix symlink; returned buffer must be freed by caller */
 133 static char *read_symlink( const char *path )
 134 {
 135     char *buffer;
 136     int ret, size = 128;
 137
 138     for (;;)
 139     {
 140         if (!(buffer = RtlAllocateHeap( GetProcessHeap(), 0, size )))
 141         {
 142             SetLastError( ERROR_NOT_ENOUGH_MEMORY );
 143             return 0;
 144         }
 145         ret = readlink( path, buffer, size );
 146         if (ret == -1)
 147         {
 148             RtlFreeHeap( GetProcessHeap(), 0, buffer );
 149             return 0;
 150         }
 151         if (ret != size)
 152         {
 153             buffer[ret] = 0;
 154             return buffer;
 155         }
 156         RtlFreeHeap( GetProcessHeap(), 0, buffer );
 157         size *= 2;
 158     }
 159 }
 160
 161 /* update a symlink if it changed; return TRUE if updated */
 162 static void update_symlink( const char *path, const char *dest, const char *orig_dest )
 163 {
 164     if (dest && dest[0])
 165     {
 166         if (!orig_dest || strcmp( orig_dest, dest ))
 167         {
 168             unlink( path );
 169             symlink( dest, path );
 170         }
 171     }
 172     else unlink( path );
 173 }
 174
 175 /* send notification about a change to a given drive */
 176 static void send_notify( int drive, int code )
 177 {
 178     DEV_BROADCAST_VOLUME info;
 179
 180     info.dbcv_size       = sizeof(info);
 181     info.dbcv_devicetype = DBT_DEVTYP_VOLUME;
 182     info.dbcv_reserved   = 0;
 183     info.dbcv_unitmask   = 1 << drive;
 184     info.dbcv_flags      = DBTF_MEDIA;
 185     BroadcastSystemMessageW( BSF_FORCEIFHUNG|BSF_QUERY, NULL,
 186                              WM_DEVICECHANGE, code, (LPARAM)&info );
 187 }
 188
 189 /* create the disk device for a given volume */
 190 static NTSTATUS create_disk_device( enum device_type type, struct disk_device **device_ret )
 191 {
 192     static const WCHAR harddiskvolW[] = {'\\','D','e','v','i','c','e',
 193                                          '\\','H','a','r','d','d','i','s','k','V','o','l','u','m','e','%','u',0};
 194     static const WCHAR harddiskW[] = {'\\','D','e','v','i','c','e','\\','H','a','r','d','d','i','s','k','%','u',0};
 195     static const WCHAR cdromW[] = {'\\','D','e','v','i','c','e','\\','C','d','R','o','m','%','u',0};
 196     static const WCHAR floppyW[] = {'\\','D','e','v','i','c','e','\\','F','l','o','p','p','y','%','u',0};
 197     static const WCHAR ramdiskW[] = {'\\','D','e','v','i','c','e','\\','R','a','m','d','i','s','k','%','u',0};
 198     static const WCHAR physdriveW[] = {'\\','?','?','\\','P','h','y','s','i','c','a','l','D','r','i','v','e','%','u',0};
 199
 200     UINT i, first = 0;
 201     NTSTATUS status = 0;
 202     const WCHAR *format = NULL;
 203     UNICODE_STRING name;
 204     DEVICE_OBJECT *dev_obj;
 205     struct disk_device *device;
 206
 207     switch(type)
 208     {
 209     case DEVICE_UNKNOWN:
 210     case DEVICE_HARDDISK:
 211     case DEVICE_NETWORK:  /* FIXME */
 212         format = harddiskW;
 213         break;
 214     case DEVICE_HARDDISK_VOL:
 215         format = harddiskvolW;
 216         first = 1;  /* harddisk volumes start counting from 1 */
 217         break;
 218     case DEVICE_FLOPPY:
 219         format = floppyW;
 220         break;
 221     case DEVICE_CDROM:
 222         format = cdromW;
 223         break;
 224     case DEVICE_RAMDISK:
 225         format = ramdiskW;
 226         break;
 227     }
 228
 229     name.MaximumLength = (strlenW(format) + 10) * sizeof(WCHAR);
 230     name.Buffer = RtlAllocateHeap( GetProcessHeap(), 0, name.MaximumLength );
 231     for (i = first; i < 32; i++)
 232     {
 233         sprintfW( name.Buffer, format, i );
 234         name.Length = strlenW(name.Buffer) * sizeof(WCHAR);
 235         status = IoCreateDevice( harddisk_driver, sizeof(*device), &name, 0, 0, FALSE, &dev_obj );
 236         if (status != STATUS_OBJECT_NAME_COLLISION) break;
 237     }
 238     if (!status)
 239     {
 240         device = dev_obj->DeviceExtension;
 241         device->dev_obj        = dev_obj;
 242         device->name           = name;
 243         device->type           = type;
 244         device->unix_device    = NULL;
 245         device->unix_mount     = NULL;
 246         device->symlink.Buffer = NULL;
 247
 248         switch (type)
 249         {
 250         case DEVICE_FLOPPY:
 251         case DEVICE_RAMDISK:
 252             device->devnum.DeviceType = FILE_DEVICE_DISK;
 253             device->devnum.DeviceNumber = i;
 254             device->devnum.PartitionNumber = ~0u;
 255             break;
 256         case DEVICE_CDROM:
 257             device->devnum.DeviceType = FILE_DEVICE_CD_ROM;
 258             device->devnum.DeviceNumber = i;
 259             device->devnum.PartitionNumber = ~0u;
 260             break;
 261         case DEVICE_UNKNOWN:
 262         case DEVICE_HARDDISK:
 263         case DEVICE_NETWORK:  /* FIXME */
 264             {
 265                 UNICODE_STRING symlink;
 266
 267                 symlink.MaximumLength = sizeof(physdriveW) + 10 * sizeof(WCHAR);
 268                 if ((symlink.Buffer = RtlAllocateHeap( GetProcessHeap(), 0, symlink.MaximumLength)))
 269                 {
 270                     sprintfW( symlink.Buffer, physdriveW, i );
 271                     symlink.Length = strlenW(symlink.Buffer) * sizeof(WCHAR);
 272                     if (!IoCreateSymbolicLink( &symlink, &name )) device->symlink = symlink;
 273                 }
 274                 device->devnum.DeviceType = FILE_DEVICE_DISK;
 275                 device->devnum.DeviceNumber = i;
 276                 device->devnum.PartitionNumber = 0;
 277             }
 278             break;
 279         case DEVICE_HARDDISK_VOL:
 280             device->devnum.DeviceType = FILE_DEVICE_DISK;
 281             device->devnum.DeviceNumber = 0;
 282             device->devnum.PartitionNumber = i;
 283             break;
 284         }
 285         *device_ret = device;
 286         TRACE( "created device %s\n", debugstr_w(name.Buffer) );
 287     }
 288     else
 289     {
 290         FIXME( "IoCreateDevice %s got %x\n", debugstr_w(name.Buffer), status );
 291         RtlFreeUnicodeString( &name );
 292     }
 293     return status;
 294 }
 295
 296 /* delete the disk device for a given drive */
 297 static void delete_disk_device( struct disk_device *device )
 298 {
 299     TRACE( "deleting device %s\n", debugstr_w(device->name.Buffer) );
 300     if (device->symlink.Buffer)
 301     {
 302         IoDeleteSymbolicLink( &device->symlink );
 303         RtlFreeUnicodeString( &device->symlink );
 304     }
 305     RtlFreeHeap( GetProcessHeap(), 0, device->unix_device );
 306     RtlFreeHeap( GetProcessHeap(), 0, device->unix_mount );
 307     RtlFreeUnicodeString( &device->name );
 308     IoDeleteDevice( device->dev_obj );
 309 }
 310
 311 /* grab another reference to a volume */
 312 static struct volume *grab_volume( struct volume *volume )
 313 {
 314     volume->ref++;
 315     return volume;
 316 }
 317
 318 /* release a volume and delete the corresponding disk device when refcount is 0 */
 319 static unsigned int release_volume( struct volume *volume )
 320 {
 321     unsigned int ret = --volume->ref;
 322
 323     if (!ret)
 324     {
 325         TRACE( "%s udi %s\n", debugstr_guid(&volume->guid), debugstr_a(volume->udi) );
 326         assert( !volume->udi );
 327         list_remove( &volume->entry );
 328         if (volume->mount) delete_mount_point( volume->mount );
 329         delete_disk_device( volume->device );
 330         RtlFreeHeap( GetProcessHeap(), 0, volume );
 331     }
 332     return ret;
 333 }
 334
 335 /* set the volume udi */
 336 static void set_volume_udi( struct volume *volume, const char *udi )
 337 {
 338     if (udi)
 339     {
 340         assert( !volume->udi );
 341         /* having a udi means the HAL side holds an extra reference */
 342         if ((volume->udi = strdupA( udi ))) grab_volume( volume );
 343     }
 344     else if (volume->udi)
 345     {
 346         RtlFreeHeap( GetProcessHeap(), 0, volume->udi );
 347         volume->udi = NULL;
 348         release_volume( volume );
 349     }
 350 }
 351
 352 /* create a disk volume */
 353 static NTSTATUS create_volume( const char *udi, enum device_type type, struct volume **volume_ret )
 354 {
 355     struct volume *volume;
 356     NTSTATUS status;
 357
 358     if (!(volume = RtlAllocateHeap( GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(*volume) )))
 359         return STATUS_NO_MEMORY;
 360
 361     if (!(status = create_disk_device( type, &volume->device )))
 362     {
 363         if (udi) set_volume_udi( volume, udi );
 364         list_add_tail( &volumes_list, &volume->entry );
 365         *volume_ret = grab_volume( volume );
 366     }
 367     else RtlFreeHeap( GetProcessHeap(), 0, volume );
 368
 369     return status;
 370 }
 371
 372 /* create the disk device for a given volume */
 373 static NTSTATUS create_dos_device( struct volume *volume, const char *udi, int letter,
 374                                    enum device_type type, struct dos_drive **drive_ret )
 375 {
 376     struct dos_drive *drive;
 377     NTSTATUS status;
 378
 379     if (!(drive = RtlAllocateHeap( GetProcessHeap(), 0, sizeof(*drive) ))) return STATUS_NO_MEMORY;
 380     drive->drive = letter;
 381     drive->mount = NULL;
 382
 383     if (volume)
 384     {
 385         if (udi) set_volume_udi( volume, udi );
 386         drive->volume = grab_volume( volume );
 387         status = STATUS_SUCCESS;
 388     }
 389     else status = create_volume( udi, type, &drive->volume );
 390
 391     if (status == STATUS_SUCCESS)
 392     {
 393         list_add_tail( &drives_list, &drive->entry );
 394         *drive_ret = drive;
 395     }
 396     else RtlFreeHeap( GetProcessHeap(), 0, drive );
 397
 398     return status;
 399 }
 400
 401 /* delete the disk device for a given drive */
 402 static void delete_dos_device( struct dos_drive *drive )
 403 {
 404     list_remove( &drive->entry );
 405     if (drive->mount) delete_mount_point( drive->mount );
 406     release_volume( drive->volume );
 407     RtlFreeHeap( GetProcessHeap(), 0, drive );
 408 }
 409
 410 /* find a volume that matches the parameters */
 411 static struct volume *find_matching_volume( const char *udi, const char *device,
 412                                             const char *mount_point, enum device_type type )
 413 {
 414     struct volume *volume;
 415     struct disk_device *disk_device;
 416
 417     LIST_FOR_EACH_ENTRY( volume, &volumes_list, struct volume, entry )
 418     {
 419         /* when we have a udi we only match drives added manually */
 420         if (udi && volume->udi) continue;
 421         /* and when we don't have a udi we only match dynamic drives */
 422         if (!udi && !volume->udi) continue;
 423
 424         disk_device = volume->device;
 425         if (disk_device->type != type) continue;
 426         if (device && disk_device->unix_device && strcmp( device, disk_device->unix_device )) continue;
 427         if (mount_point && disk_device->unix_mount && strcmp( mount_point, disk_device->unix_mount )) continue;
 428         TRACE( "found matching volume %s for device %s mount %s type %u\n",
 429                debugstr_guid(&volume->guid), debugstr_a(device), debugstr_a(mount_point), type );
 430         return grab_volume( volume );
 431     }
 432     return NULL;
 433 }
 434
 435 /* change the information for an existing volume */
 436 static NTSTATUS set_volume_info( struct volume *volume, struct dos_drive *drive, const char *device,
 437                                  const char *mount_point, enum device_type type, const GUID *guid )
 438 {
 439     void *id = NULL;
 440     unsigned int id_len = 0;
 441     struct disk_device *disk_device = volume->device;
 442     NTSTATUS status;
 443
 444     if (type != disk_device->type)
 445     {
 446         if ((status = create_disk_device( type, &disk_device ))) return status;
 447         if (volume->mount)
 448         {
 449             delete_mount_point( volume->mount );
 450             volume->mount = NULL;
 451         }
 452         if (drive && drive->mount)
 453         {
 454             delete_mount_point( drive->mount );
 455             drive->mount = NULL;
 456         }
 457         delete_disk_device( volume->device );
 458         volume->device = disk_device;
 459     }
 460     else
 461     {
 462         RtlFreeHeap( GetProcessHeap(), 0, disk_device->unix_device );
 463         RtlFreeHeap( GetProcessHeap(), 0, disk_device->unix_mount );
 464     }
 465     disk_device->unix_device = strdupA( device );
 466     disk_device->unix_mount = strdupA( mount_point );
 467
 468     if (guid && memcmp( &volume->guid, guid, sizeof(volume->guid) ))
 469     {
 470         volume->guid = *guid;
 471         if (volume->mount)
 472         {
 473             delete_mount_point( volume->mount );
 474             volume->mount = NULL;
 475         }
 476     }
 477
 478     if (!volume->mount)
 479         volume->mount = add_volume_mount_point( disk_device->dev_obj, &disk_device->name, &volume->guid );
 480     if (drive && !drive->mount)
 481         drive->mount = add_dosdev_mount_point( disk_device->dev_obj, &disk_device->name, drive->drive );
 482
 483     if (disk_device->unix_mount)
 484     {
 485         id = disk_device->unix_mount;
 486         id_len = strlen( disk_device->unix_mount ) + 1;
 487     }
 488     if (volume->mount) set_mount_point_id( volume->mount, id, id_len );
 489     if (drive && drive->mount) set_mount_point_id( drive->mount, id, id_len );
 490
 491     return STATUS_SUCCESS;
 492 }
 493
 494 /* change the drive letter or volume for an existing drive */
 495 static void set_drive_info( struct dos_drive *drive, int letter, struct volume *volume )
 496 {
 497     if (drive->drive != letter)
 498     {
 499         if (drive->mount) delete_mount_point( drive->mount );
 500         drive->mount = NULL;
 501         drive->drive = letter;
 502     }
 503     if (drive->volume != volume)
 504     {
 505         if (drive->mount) delete_mount_point( drive->mount );
 506         drive->mount = NULL;
 507         grab_volume( volume );
 508         release_volume( drive->volume );
 509         drive->volume = volume;
 510     }
 511 }
 512
 513 static inline int is_valid_device( struct stat *st )
 514 {
 515 #if defined(linux) || defined(__sun__)
 516     return S_ISBLK( st->st_mode );
 517 #else
 518     /* disks are char devices on *BSD */
 519     return S_ISCHR( st->st_mode );
 520 #endif
 521 }
 522
 523 /* find or create a DOS drive for the corresponding device */
 524 static int add_drive( const char *device, enum device_type type )
 525 {
 526     char *path, *p;
 527     char in_use[26];
 528     struct stat dev_st, drive_st;
 529     int drive, first, last, avail = 0;
 530
 531     if (stat( device, &dev_st ) == -1 || !is_valid_device( &dev_st )) return -1;
 532
 533     if (!(path = get_dosdevices_path( &p ))) return -1;
 534
 535     memset( in_use, 0, sizeof(in_use) );
 536
 537     switch (type)
 538     {
 539     case DEVICE_FLOPPY:
 540         first = 0;
 541         last = 2;
 542         break;
 543     case DEVICE_CDROM:
 544         first = 3;
 545         last = 26;
 546         break;
 547     default:
 548         first = 2;
 549         last = 26;
 550         break;
 551     }
 552
 553     while (avail != -1)
 554     {
 555         avail = -1;
 556         for (drive = first; drive < last; drive++)
 557         {
 558             if (in_use[drive]) continue;  /* already checked */
 559             *p = 'a' + drive;
 560             if (stat( path, &drive_st ) == -1)
 561             {
 562                 if (lstat( path, &drive_st ) == -1 && errno == ENOENT)  /* this is a candidate */
 563                 {
 564                     if (avail == -1)
 565                     {
 566                         p[2] = 0;
 567                         /* if mount point symlink doesn't exist either, it's available */
 568                         if (lstat( path, &drive_st ) == -1 && errno == ENOENT) avail = drive;
 569                         p[2] = ':';
 570                     }
 571                 }
 572                 else in_use[drive] = 1;
 573             }
 574             else
 575             {
 576                 in_use[drive] = 1;
 577                 if (!is_valid_device( &drive_st )) continue;
 578                 if (dev_st.st_rdev == drive_st.st_rdev) goto done;
 579             }
 580         }
 581         if (avail != -1)
 582         {
 583             /* try to use the one we found */
 584             drive = avail;
 585             *p = 'a' + drive;
 586             if (symlink( device, path ) != -1) goto done;
 587             /* failed, retry the search */
 588         }
 589     }
 590     drive = -1;
 591
 592 done:
 593     HeapFree( GetProcessHeap(), 0, path );
 594     return drive;
 595 }
 596
 597 /* create devices for mapped drives */
 598 static void create_drive_devices(void)
 599 {
 600     char *path, *p, *link, *device;
 601     struct dos_drive *drive;
 602     struct volume *volume;
 603     unsigned int i;
 604     HKEY drives_key;
 605     enum device_type drive_type;
 606     WCHAR driveW[] = {'a',':',0};
 607
 608     if (!(path = get_dosdevices_path( &p ))) return;
 609     if (RegOpenKeyW( HKEY_LOCAL_MACHINE, drives_keyW, &drives_key )) drives_key = 0;
 610
 611     for (i = 0; i < MAX_DOS_DRIVES; i++)
 612     {
 613         p[0] = 'a' + i;
 614         p[2] = 0;
 615         if (!(link = read_symlink( path ))) continue;
 616         p[2] = ':';
 617         device = read_symlink( path );
 618
 619         drive_type = i < 2 ? DEVICE_FLOPPY : DEVICE_HARDDISK_VOL;
 620         if (drives_key)
 621         {
 622             WCHAR buffer[32];
 623             DWORD j, type, size = sizeof(buffer);
 624
 625             driveW[0] = 'a' + i;
 626             if (!RegQueryValueExW( drives_key, driveW, NULL, &type, (BYTE *)buffer, &size ) &&
 627                 type == REG_SZ)
 628             {
 629                 for (j = 0; j < sizeof(drive_types)/sizeof(drive_types[0]); j++)
 630                     if (drive_types[j][0] && !strcmpiW( buffer, drive_types[j] ))
 631                     {
 632                         drive_type = j;
 633                         break;
 634                     }
 635                 if (drive_type == DEVICE_FLOPPY && i >= 2) drive_type = DEVICE_HARDDISK;
 636             }
 637         }
 638
 639         volume = find_matching_volume( NULL, device, link, drive_type );
 640         if (!create_dos_device( volume, NULL, i, drive_type, &drive ))
 641         {
 642             /* don't reset uuid if we used an existing volume */
 643             const GUID *guid = volume ? NULL : get_default_uuid(i);
 644             set_volume_info( drive->volume, drive, device, link, drive_type, guid );
 645         }
 646         else
 647         {
 648             RtlFreeHeap( GetProcessHeap(), 0, link );
 649             RtlFreeHeap( GetProcessHeap(), 0, device );
 650         }
 651         if (volume) release_volume( volume );
 652     }
 653     RegCloseKey( drives_key );
 654     RtlFreeHeap( GetProcessHeap(), 0, path );
 655 }
 656
 657 /* create a new disk volume */
 658 NTSTATUS add_volume( const char *udi, const char *device, const char *mount_point,
 659                      enum device_type type, const GUID *guid )
 660 {
 661     struct volume *volume;
 662     NTSTATUS status = STATUS_SUCCESS;
 663
 664     TRACE( "adding %s device %s mount %s type %u uuid %s\n", debugstr_a(udi),
 665            debugstr_a(device), debugstr_a(mount_point), type, debugstr_guid(guid) );
 666
 667     EnterCriticalSection( &device_section );
 668     LIST_FOR_EACH_ENTRY( volume, &volumes_list, struct volume, entry )
 669         if (volume->udi && !strcmp( udi, volume->udi )) goto found;
 670
 671     /* udi not found, search for a non-dynamic volume */
 672     if ((volume = find_matching_volume( udi, device, mount_point, type ))) set_volume_udi( volume, udi );
 673     else status = create_volume( udi, type, &volume );
 674
 675 found:
 676     if (!status) status = set_volume_info( volume, NULL, device, mount_point, type, guid );
 677     if (volume) release_volume( volume );
 678     LeaveCriticalSection( &device_section );
 679     return status;
 680 }
 681
 682 /* create a new disk volume */
 683 NTSTATUS remove_volume( const char *udi )
 684 {
 685     NTSTATUS status = STATUS_NO_SUCH_DEVICE;
 686     struct volume *volume;
 687
 688     EnterCriticalSection( &device_section );
 689     LIST_FOR_EACH_ENTRY( volume, &volumes_list, struct volume, entry )
 690     {
 691         if (!volume->udi || strcmp( udi, volume->udi )) continue;
 692         set_volume_udi( volume, NULL );
 693         status = STATUS_SUCCESS;
 694         break;
 695     }
 696     LeaveCriticalSection( &device_section );
 697     return status;
 698 }
 699
 700
 701 /* create a new dos drive */
 702 NTSTATUS add_dos_device( int letter, const char *udi, const char *device,
 703                          const char *mount_point, enum device_type type, const GUID *guid )
 704 {
 705     char *path, *p;
 706     HKEY hkey;
 707     NTSTATUS status = STATUS_SUCCESS;
 708     struct dos_drive *drive, *next;
 709     struct volume *volume;
 710     int notify = -1;
 711
 712     if (!(path = get_dosdevices_path( &p ))) return STATUS_NO_MEMORY;
 713
 714     EnterCriticalSection( &device_section );
 715     volume = find_matching_volume( udi, device, mount_point, type );
 716
 717     if (letter == -1)  /* auto-assign a letter */
 718     {
 719         letter = add_drive( device, type );
 720         if (letter == -1)
 721         {
 722             status = STATUS_OBJECT_NAME_COLLISION;
 723             goto done;
 724         }
 725
 726         LIST_FOR_EACH_ENTRY_SAFE( drive, next, &drives_list, struct dos_drive, entry )
 727         {
 728             if (drive->volume->udi && !strcmp( udi, drive->volume->udi )) goto found;
 729             if (drive->drive == letter) delete_dos_device( drive );
 730         }
 731     }
 732     else  /* simply reset the device symlink */
 733     {
 734         LIST_FOR_EACH_ENTRY( drive, &drives_list, struct dos_drive, entry )
 735             if (drive->drive == letter) break;
 736
 737         *p = 'a' + letter;
 738         if (&drive->entry == &drives_list) update_symlink( path, device, NULL );
 739         else
 740         {
 741             update_symlink( path, device, drive->volume->device->unix_device );
 742             delete_dos_device( drive );
 743         }
 744     }
 745
 746     if ((status = create_dos_device( volume, udi, letter, type, &drive ))) goto done;
 747
 748 found:
 749     if (!guid && !volume) guid = get_default_uuid( letter );
 750     if (!volume) volume = grab_volume( drive->volume );
 751     set_drive_info( drive, letter, volume );
 752     p[0] = 'a' + drive->drive;
 753     p[2] = 0;
 754     update_symlink( path, mount_point, volume->device->unix_mount );
 755     set_volume_info( volume, drive, device, mount_point, type, guid );
 756
 757     TRACE( "added device %c: udi %s for %s on %s type %u\n",
 758            'a' + drive->drive, wine_dbgstr_a(udi), wine_dbgstr_a(device),
 759            wine_dbgstr_a(mount_point), type );
 760
 761     /* hack: force the drive type in the registry */
 762     if (!RegCreateKeyW( HKEY_LOCAL_MACHINE, drives_keyW, &hkey ))
 763     {
 764         const WCHAR *type_name = drive_types[type];
 765         WCHAR name[3] = {'a',':',0};
 766
 767         name[0] += drive->drive;
 768         if (!type_name[0] && type == DEVICE_HARDDISK) type_name = drive_types[DEVICE_FLOPPY];
 769         if (type_name[0])
 770             RegSetValueExW( hkey, name, 0, REG_SZ, (const BYTE *)type_name,
 771                             (strlenW(type_name) + 1) * sizeof(WCHAR) );
 772         else
 773             RegDeleteValueW( hkey, name );
 774         RegCloseKey( hkey );
 775     }
 776
 777     if (udi) notify = drive->drive;
 778
 779 done:
 780     if (volume) release_volume( volume );
 781     LeaveCriticalSection( &device_section );
 782     RtlFreeHeap( GetProcessHeap(), 0, path );
 783     if (notify != -1) send_notify( notify, DBT_DEVICEARRIVAL );
 784     return status;
 785 }
 786
 787 /* remove an existing dos drive, by letter or udi */
 788 NTSTATUS remove_dos_device( int letter, const char *udi )
 789 {
 790     NTSTATUS status = STATUS_NO_SUCH_DEVICE;
 791     HKEY hkey;
 792     struct dos_drive *drive;
 793     char *path, *p;
 794     int notify = -1;
 795
 796     EnterCriticalSection( &device_section );
 797     LIST_FOR_EACH_ENTRY( drive, &drives_list, struct dos_drive, entry )
 798     {
 799         if (udi)
 800         {
 801             if (!drive->volume->udi) continue;
 802             if (strcmp( udi, drive->volume->udi )) continue;
 803             set_volume_udi( drive->volume, NULL );
 804         }
 805         else if (drive->drive != letter) continue;
 806
 807         if ((path = get_dosdevices_path( &p )))
 808         {
 809             p[0] = 'a' + drive->drive;
 810             p[2] = 0;
 811             unlink( path );
 812             RtlFreeHeap( GetProcessHeap(), 0, path );
 813         }
 814
 815         /* clear the registry key too */
 816         if (!RegOpenKeyW( HKEY_LOCAL_MACHINE, drives_keyW, &hkey ))
 817         {
 818             WCHAR name[3] = {'a',':',0};
 819             name[0] += drive->drive;
 820             RegDeleteValueW( hkey, name );
 821             RegCloseKey( hkey );
 822         }
 823
 824         if (udi && drive->volume->device->unix_mount) notify = drive->drive;
 825
 826         delete_dos_device( drive );
 827         status = STATUS_SUCCESS;
 828         break;
 829     }
 830     LeaveCriticalSection( &device_section );
 831     if (notify != -1) send_notify( notify, DBT_DEVICEREMOVECOMPLETE );
 832     return status;
 833 }
 834
 835 /* query information about an existing dos drive, by letter or udi */
 836 NTSTATUS query_dos_device( int letter, enum device_type *type, char **device, char **mount_point )
 837 {
 838     NTSTATUS status = STATUS_NO_SUCH_DEVICE;
 839     struct dos_drive *drive;
 840     struct disk_device *disk_device;
 841
 842     EnterCriticalSection( &device_section );
 843     LIST_FOR_EACH_ENTRY( drive, &drives_list, struct dos_drive, entry )
 844     {
 845         if (drive->drive != letter) continue;
 846         disk_device = drive->volume->device;
 847         if (type) *type = disk_device->type;
 848         if (device) *device = strdupA( disk_device->unix_device );
 849         if (mount_point) *mount_point = strdupA( disk_device->unix_mount );
 850         status = STATUS_SUCCESS;
 851         break;
 852     }
 853     LeaveCriticalSection( &device_section );
 854     return status;
 855 }
 856
 857 /* handler for ioctls on the harddisk device */
 858 static NTSTATUS WINAPI harddisk_ioctl( DEVICE_OBJECT *device, IRP *irp )
 859 {
 860     IO_STACK_LOCATION *irpsp = IoGetCurrentIrpStackLocation( irp );
 861     struct disk_device *dev = device->DeviceExtension;
 862
 863     TRACE( "ioctl %x insize %u outsize %u\n",
 864            irpsp->Parameters.DeviceIoControl.IoControlCode,
 865            irpsp->Parameters.DeviceIoControl.InputBufferLength,
 866            irpsp->Parameters.DeviceIoControl.OutputBufferLength );
 867
 868     EnterCriticalSection( &device_section );
 869
 870     switch(irpsp->Parameters.DeviceIoControl.IoControlCode)
 871     {
 872     case IOCTL_DISK_GET_DRIVE_GEOMETRY:
 873     {
 874         DISK_GEOMETRY info;
 875         DWORD len = min( sizeof(info), irpsp->Parameters.DeviceIoControl.OutputBufferLength );
 876
 877         info.Cylinders.QuadPart = 10000;
 878         info.MediaType = (dev->devnum.DeviceType == FILE_DEVICE_DISK) ? FixedMedia : RemovableMedia;
 879         info.TracksPerCylinder = 255;
 880         info.SectorsPerTrack = 63;
 881         info.BytesPerSector = 512;
 882         memcpy( irp->MdlAddress->StartVa, &info, len );
 883         irp->IoStatus.Information = len;
 884         irp->IoStatus.u.Status = STATUS_SUCCESS;
 885         break;
 886     }
 887     case IOCTL_STORAGE_GET_DEVICE_NUMBER:
 888     {
 889         DWORD len = min( sizeof(dev->devnum), irpsp->Parameters.DeviceIoControl.OutputBufferLength );
 890
 891         memcpy( irp->MdlAddress->StartVa, &dev->devnum, len );
 892         irp->IoStatus.Information = len;
 893         irp->IoStatus.u.Status = STATUS_SUCCESS;
 894         break;
 895     }
 896     case IOCTL_CDROM_READ_TOC:
 897         irp->IoStatus.u.Status = STATUS_INVALID_DEVICE_REQUEST;
 898         break;
 899     default:
 900         FIXME( "unsupported ioctl %x\n", irpsp->Parameters.DeviceIoControl.IoControlCode );
 901         irp->IoStatus.u.Status = STATUS_NOT_SUPPORTED;
 902         break;
 903     }
 904
 905     LeaveCriticalSection( &device_section );
 906     IoCompleteRequest( irp, IO_NO_INCREMENT );
 907     return irp->IoStatus.u.Status;
 908 }
 909
 910 /* driver entry point for the harddisk driver */
 911 NTSTATUS WINAPI harddisk_driver_entry( DRIVER_OBJECT *driver, UNICODE_STRING *path )
 912 {
 913     struct disk_device *device;
 914
 915     harddisk_driver = driver;
 916     driver->MajorFunction[IRP_MJ_DEVICE_CONTROL] = harddisk_ioctl;
 917
 918     /* create a harddisk0 device that isn't assigned to any drive */
 919     create_disk_device( DEVICE_HARDDISK, &device );
 920
 921     create_drive_devices();
 922
 923     return STATUS_SUCCESS;
 924 }