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     case DEVICE_DVD:
 223         format = cdromW;
 224         break;
 225     case DEVICE_RAMDISK:
 226         format = ramdiskW;
 227         break;
 228     }
 229
 230     name.MaximumLength = (strlenW(format) + 10) * sizeof(WCHAR);
 231     name.Buffer = RtlAllocateHeap( GetProcessHeap(), 0, name.MaximumLength );
 232     for (i = first; i < 32; i++)
 233     {
 234         sprintfW( name.Buffer, format, i );
 235         name.Length = strlenW(name.Buffer) * sizeof(WCHAR);
 236         status = IoCreateDevice( harddisk_driver, sizeof(*device), &name, 0, 0, FALSE, &dev_obj );
 237         if (status != STATUS_OBJECT_NAME_COLLISION) break;
 238     }
 239     if (!status)
 240     {
 241         device = dev_obj->DeviceExtension;
 242         device->dev_obj        = dev_obj;
 243         device->name           = name;
 244         device->type           = type;
 245         device->unix_device    = NULL;
 246         device->unix_mount     = NULL;
 247         device->symlink.Buffer = NULL;
 248
 249         switch (type)
 250         {
 251         case DEVICE_FLOPPY:
 252         case DEVICE_RAMDISK:
 253             device->devnum.DeviceType = FILE_DEVICE_DISK;
 254             device->devnum.DeviceNumber = i;
 255             device->devnum.PartitionNumber = ~0u;
 256             break;
 257         case DEVICE_CDROM:
 258             device->devnum.DeviceType = FILE_DEVICE_CD_ROM;
 259             device->devnum.DeviceNumber = i;
 260             device->devnum.PartitionNumber = ~0u;
 261             break;
 262         case DEVICE_DVD:
 263             device->devnum.DeviceType = FILE_DEVICE_DVD;
 264             device->devnum.DeviceNumber = i;
 265             device->devnum.PartitionNumber = ~0u;
 266             break;
 267         case DEVICE_UNKNOWN:
 268         case DEVICE_HARDDISK:
 269         case DEVICE_NETWORK:  /* FIXME */
 270             {
 271                 UNICODE_STRING symlink;
 272
 273                 symlink.MaximumLength = sizeof(physdriveW) + 10 * sizeof(WCHAR);
 274                 if ((symlink.Buffer = RtlAllocateHeap( GetProcessHeap(), 0, symlink.MaximumLength)))
 275                 {
 276                     sprintfW( symlink.Buffer, physdriveW, i );
 277                     symlink.Length = strlenW(symlink.Buffer) * sizeof(WCHAR);
 278                     if (!IoCreateSymbolicLink( &symlink, &name )) device->symlink = symlink;
 279                 }
 280                 device->devnum.DeviceType = FILE_DEVICE_DISK;
 281                 device->devnum.DeviceNumber = i;
 282                 device->devnum.PartitionNumber = 0;
 283             }
 284             break;
 285         case DEVICE_HARDDISK_VOL:
 286             device->devnum.DeviceType = FILE_DEVICE_DISK;
 287             device->devnum.DeviceNumber = 0;
 288             device->devnum.PartitionNumber = i;
 289             break;
 290         }
 291         *device_ret = device;
 292         TRACE( "created device %s\n", debugstr_w(name.Buffer) );
 293     }
 294     else
 295     {
 296         FIXME( "IoCreateDevice %s got %x\n", debugstr_w(name.Buffer), status );
 297         RtlFreeUnicodeString( &name );
 298     }
 299     return status;
 300 }
 301
 302 /* delete the disk device for a given drive */
 303 static void delete_disk_device( struct disk_device *device )
 304 {
 305     TRACE( "deleting device %s\n", debugstr_w(device->name.Buffer) );
 306     if (device->symlink.Buffer)
 307     {
 308         IoDeleteSymbolicLink( &device->symlink );
 309         RtlFreeUnicodeString( &device->symlink );
 310     }
 311     RtlFreeHeap( GetProcessHeap(), 0, device->unix_device );
 312     RtlFreeHeap( GetProcessHeap(), 0, device->unix_mount );
 313     RtlFreeUnicodeString( &device->name );
 314     IoDeleteDevice( device->dev_obj );
 315 }
 316
 317 /* grab another reference to a volume */
 318 static struct volume *grab_volume( struct volume *volume )
 319 {
 320     volume->ref++;
 321     return volume;
 322 }
 323
 324 /* release a volume and delete the corresponding disk device when refcount is 0 */
 325 static unsigned int release_volume( struct volume *volume )
 326 {
 327     unsigned int ret = --volume->ref;
 328
 329     if (!ret)
 330     {
 331         TRACE( "%s udi %s\n", debugstr_guid(&volume->guid), debugstr_a(volume->udi) );
 332         assert( !volume->udi );
 333         list_remove( &volume->entry );
 334         if (volume->mount) delete_mount_point( volume->mount );
 335         delete_disk_device( volume->device );
 336         RtlFreeHeap( GetProcessHeap(), 0, volume );
 337     }
 338     return ret;
 339 }
 340
 341 /* set the volume udi */
 342 static void set_volume_udi( struct volume *volume, const char *udi )
 343 {
 344     if (udi)
 345     {
 346         assert( !volume->udi );
 347         /* having a udi means the HAL side holds an extra reference */
 348         if ((volume->udi = strdupA( udi ))) grab_volume( volume );
 349     }
 350     else if (volume->udi)
 351     {
 352         RtlFreeHeap( GetProcessHeap(), 0, volume->udi );
 353         volume->udi = NULL;
 354         release_volume( volume );
 355     }
 356 }
 357
 358 /* create a disk volume */
 359 static NTSTATUS create_volume( const char *udi, enum device_type type, struct volume **volume_ret )
 360 {
 361     struct volume *volume;
 362     NTSTATUS status;
 363
 364     if (!(volume = RtlAllocateHeap( GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(*volume) )))
 365         return STATUS_NO_MEMORY;
 366
 367     if (!(status = create_disk_device( type, &volume->device )))
 368     {
 369         if (udi) set_volume_udi( volume, udi );
 370         list_add_tail( &volumes_list, &volume->entry );
 371         *volume_ret = grab_volume( volume );
 372     }
 373     else RtlFreeHeap( GetProcessHeap(), 0, volume );
 374
 375     return status;
 376 }
 377
 378 /* create the disk device for a given volume */
 379 static NTSTATUS create_dos_device( struct volume *volume, const char *udi, int letter,
 380                                    enum device_type type, struct dos_drive **drive_ret )
 381 {
 382     struct dos_drive *drive;
 383     NTSTATUS status;
 384
 385     if (!(drive = RtlAllocateHeap( GetProcessHeap(), 0, sizeof(*drive) ))) return STATUS_NO_MEMORY;
 386     drive->drive = letter;
 387     drive->mount = NULL;
 388
 389     if (volume)
 390     {
 391         if (udi) set_volume_udi( volume, udi );
 392         drive->volume = grab_volume( volume );
 393         status = STATUS_SUCCESS;
 394     }
 395     else status = create_volume( udi, type, &drive->volume );
 396
 397     if (status == STATUS_SUCCESS)
 398     {
 399         list_add_tail( &drives_list, &drive->entry );
 400         *drive_ret = drive;
 401     }
 402     else RtlFreeHeap( GetProcessHeap(), 0, drive );
 403
 404     return status;
 405 }
 406
 407 /* delete the disk device for a given drive */
 408 static void delete_dos_device( struct dos_drive *drive )
 409 {
 410     list_remove( &drive->entry );
 411     if (drive->mount) delete_mount_point( drive->mount );
 412     release_volume( drive->volume );
 413     RtlFreeHeap( GetProcessHeap(), 0, drive );
 414 }
 415
 416 /* find a volume that matches the parameters */
 417 static struct volume *find_matching_volume( const char *udi, const char *device,
 418                                             const char *mount_point, enum device_type type )
 419 {
 420     struct volume *volume;
 421     struct disk_device *disk_device;
 422
 423     LIST_FOR_EACH_ENTRY( volume, &volumes_list, struct volume, entry )
 424     {
 425         /* when we have a udi we only match drives added manually */
 426         if (udi && volume->udi) continue;
 427         /* and when we don't have a udi we only match dynamic drives */
 428         if (!udi && !volume->udi) continue;
 429
 430         disk_device = volume->device;
 431         if (disk_device->type != type) continue;
 432         if (device && disk_device->unix_device && strcmp( device, disk_device->unix_device )) continue;
 433         if (mount_point && disk_device->unix_mount && strcmp( mount_point, disk_device->unix_mount )) continue;
 434         TRACE( "found matching volume %s for device %s mount %s type %u\n",
 435                debugstr_guid(&volume->guid), debugstr_a(device), debugstr_a(mount_point), type );
 436         return grab_volume( volume );
 437     }
 438     return NULL;
 439 }
 440
 441 /* change the information for an existing volume */
 442 static NTSTATUS set_volume_info( struct volume *volume, struct dos_drive *drive, const char *device,
 443                                  const char *mount_point, enum device_type type, const GUID *guid )
 444 {
 445     void *id = NULL;
 446     unsigned int id_len = 0;
 447     struct disk_device *disk_device = volume->device;
 448     NTSTATUS status;
 449
 450     if (type != disk_device->type)
 451     {
 452         if ((status = create_disk_device( type, &disk_device ))) return status;
 453         if (volume->mount)
 454         {
 455             delete_mount_point( volume->mount );
 456             volume->mount = NULL;
 457         }
 458         if (drive && drive->mount)
 459         {
 460             delete_mount_point( drive->mount );
 461             drive->mount = NULL;
 462         }
 463         delete_disk_device( volume->device );
 464         volume->device = disk_device;
 465     }
 466     else
 467     {
 468         RtlFreeHeap( GetProcessHeap(), 0, disk_device->unix_device );
 469         RtlFreeHeap( GetProcessHeap(), 0, disk_device->unix_mount );
 470     }
 471     disk_device->unix_device = strdupA( device );
 472     disk_device->unix_mount = strdupA( mount_point );
 473
 474     if (guid && memcmp( &volume->guid, guid, sizeof(volume->guid) ))
 475     {
 476         volume->guid = *guid;
 477         if (volume->mount)
 478         {
 479             delete_mount_point( volume->mount );
 480             volume->mount = NULL;
 481         }
 482     }
 483
 484     if (!volume->mount)
 485         volume->mount = add_volume_mount_point( disk_device->dev_obj, &disk_device->name, &volume->guid );
 486     if (drive && !drive->mount)
 487         drive->mount = add_dosdev_mount_point( disk_device->dev_obj, &disk_device->name, drive->drive );
 488
 489     if (disk_device->unix_mount)
 490     {
 491         id = disk_device->unix_mount;
 492         id_len = strlen( disk_device->unix_mount ) + 1;
 493     }
 494     if (volume->mount) set_mount_point_id( volume->mount, id, id_len );
 495     if (drive && drive->mount) set_mount_point_id( drive->mount, id, id_len );
 496
 497     return STATUS_SUCCESS;
 498 }
 499
 500 /* change the drive letter or volume for an existing drive */
 501 static void set_drive_info( struct dos_drive *drive, int letter, struct volume *volume )
 502 {
 503     if (drive->drive != letter)
 504     {
 505         if (drive->mount) delete_mount_point( drive->mount );
 506         drive->mount = NULL;
 507         drive->drive = letter;
 508     }
 509     if (drive->volume != volume)
 510     {
 511         if (drive->mount) delete_mount_point( drive->mount );
 512         drive->mount = NULL;
 513         grab_volume( volume );
 514         release_volume( drive->volume );
 515         drive->volume = volume;
 516     }
 517 }
 518
 519 static inline int is_valid_device( struct stat *st )
 520 {
 521 #if defined(linux) || defined(__sun__)
 522     return S_ISBLK( st->st_mode );
 523 #else
 524     /* disks are char devices on *BSD */
 525     return S_ISCHR( st->st_mode );
 526 #endif
 527 }
 528
 529 /* find or create a DOS drive for the corresponding device */
 530 static int add_drive( const char *device, enum device_type type )
 531 {
 532     char *path, *p;
 533     char in_use[26];
 534     struct stat dev_st, drive_st;
 535     int drive, first, last, avail = 0;
 536
 537     if (stat( device, &dev_st ) == -1 || !is_valid_device( &dev_st )) return -1;
 538
 539     if (!(path = get_dosdevices_path( &p ))) return -1;
 540
 541     memset( in_use, 0, sizeof(in_use) );
 542
 543     switch (type)
 544     {
 545     case DEVICE_FLOPPY:
 546         first = 0;
 547         last = 2;
 548         break;
 549     case DEVICE_CDROM:
 550     case DEVICE_DVD:
 551         first = 3;
 552         last = 26;
 553         break;
 554     default:
 555         first = 2;
 556         last = 26;
 557         break;
 558     }
 559
 560     while (avail != -1)
 561     {
 562         avail = -1;
 563         for (drive = first; drive < last; drive++)
 564         {
 565             if (in_use[drive]) continue;  /* already checked */
 566             *p = 'a' + drive;
 567             if (stat( path, &drive_st ) == -1)
 568             {
 569                 if (lstat( path, &drive_st ) == -1 && errno == ENOENT)  /* this is a candidate */
 570                 {
 571                     if (avail == -1)
 572                     {
 573                         p[2] = 0;
 574                         /* if mount point symlink doesn't exist either, it's available */
 575                         if (lstat( path, &drive_st ) == -1 && errno == ENOENT) avail = drive;
 576                         p[2] = ':';
 577                     }
 578                 }
 579                 else in_use[drive] = 1;
 580             }
 581             else
 582             {
 583                 in_use[drive] = 1;
 584                 if (!is_valid_device( &drive_st )) continue;
 585                 if (dev_st.st_rdev == drive_st.st_rdev) goto done;
 586             }
 587         }
 588         if (avail != -1)
 589         {
 590             /* try to use the one we found */
 591             drive = avail;
 592             *p = 'a' + drive;
 593             if (symlink( device, path ) != -1) goto done;
 594             /* failed, retry the search */
 595         }
 596     }
 597     drive = -1;
 598
 599 done:
 600     HeapFree( GetProcessHeap(), 0, path );
 601     return drive;
 602 }
 603
 604 /* create devices for mapped drives */
 605 static void create_drive_devices(void)
 606 {
 607     char *path, *p, *link, *device;
 608     struct dos_drive *drive;
 609     struct volume *volume;
 610     unsigned int i;
 611     HKEY drives_key;
 612     enum device_type drive_type;
 613     WCHAR driveW[] = {'a',':',0};
 614
 615     if (!(path = get_dosdevices_path( &p ))) return;
 616     if (RegOpenKeyW( HKEY_LOCAL_MACHINE, drives_keyW, &drives_key )) drives_key = 0;
 617
 618     for (i = 0; i < MAX_DOS_DRIVES; i++)
 619     {
 620         p[0] = 'a' + i;
 621         p[2] = 0;
 622         if (!(link = read_symlink( path ))) continue;
 623         p[2] = ':';
 624         device = read_symlink( path );
 625
 626         drive_type = i < 2 ? DEVICE_FLOPPY : DEVICE_HARDDISK_VOL;
 627         if (drives_key)
 628         {
 629             WCHAR buffer[32];
 630             DWORD j, type, size = sizeof(buffer);
 631
 632             driveW[0] = 'a' + i;
 633             if (!RegQueryValueExW( drives_key, driveW, NULL, &type, (BYTE *)buffer, &size ) &&
 634                 type == REG_SZ)
 635             {
 636                 for (j = 0; j < sizeof(drive_types)/sizeof(drive_types[0]); j++)
 637                     if (drive_types[j][0] && !strcmpiW( buffer, drive_types[j] ))
 638                     {
 639                         drive_type = j;
 640                         break;
 641                     }
 642                 if (drive_type == DEVICE_FLOPPY && i >= 2) drive_type = DEVICE_HARDDISK;
 643             }
 644         }
 645
 646         volume = find_matching_volume( NULL, device, link, drive_type );
 647         if (!create_dos_device( volume, NULL, i, drive_type, &drive ))
 648         {
 649             /* don't reset uuid if we used an existing volume */
 650             const GUID *guid = volume ? NULL : get_default_uuid(i);
 651             set_volume_info( drive->volume, drive, device, link, drive_type, guid );
 652         }
 653         else
 654         {
 655             RtlFreeHeap( GetProcessHeap(), 0, link );
 656             RtlFreeHeap( GetProcessHeap(), 0, device );
 657         }
 658         if (volume) release_volume( volume );
 659     }
 660     RegCloseKey( drives_key );
 661     RtlFreeHeap( GetProcessHeap(), 0, path );
 662 }
 663
 664 /* create a new disk volume */
 665 NTSTATUS add_volume( const char *udi, const char *device, const char *mount_point,
 666                      enum device_type type, const GUID *guid )
 667 {
 668     struct volume *volume;
 669     NTSTATUS status = STATUS_SUCCESS;
 670
 671     TRACE( "adding %s device %s mount %s type %u uuid %s\n", debugstr_a(udi),
 672            debugstr_a(device), debugstr_a(mount_point), type, debugstr_guid(guid) );
 673
 674     EnterCriticalSection( &device_section );
 675     LIST_FOR_EACH_ENTRY( volume, &volumes_list, struct volume, entry )
 676         if (volume->udi && !strcmp( udi, volume->udi ))
 677         {
 678             grab_volume( volume );
 679             goto found;
 680         }
 681
 682     /* udi not found, search for a non-dynamic volume */
 683     if ((volume = find_matching_volume( udi, device, mount_point, type ))) set_volume_udi( volume, udi );
 684     else status = create_volume( udi, type, &volume );
 685
 686 found:
 687     if (!status) status = set_volume_info( volume, NULL, device, mount_point, type, guid );
 688     if (volume) release_volume( volume );
 689     LeaveCriticalSection( &device_section );
 690     return status;
 691 }
 692
 693 /* create a new disk volume */
 694 NTSTATUS remove_volume( const char *udi )
 695 {
 696     NTSTATUS status = STATUS_NO_SUCH_DEVICE;
 697     struct volume *volume;
 698
 699     EnterCriticalSection( &device_section );
 700     LIST_FOR_EACH_ENTRY( volume, &volumes_list, struct volume, entry )
 701     {
 702         if (!volume->udi || strcmp( udi, volume->udi )) continue;
 703         set_volume_udi( volume, NULL );
 704         status = STATUS_SUCCESS;
 705         break;
 706     }
 707     LeaveCriticalSection( &device_section );
 708     return status;
 709 }
 710
 711
 712 /* create a new dos drive */
 713 NTSTATUS add_dos_device( int letter, const char *udi, const char *device,
 714                          const char *mount_point, enum device_type type, const GUID *guid )
 715 {
 716     char *path, *p;
 717     HKEY hkey;
 718     NTSTATUS status = STATUS_SUCCESS;
 719     struct dos_drive *drive, *next;
 720     struct volume *volume;
 721     int notify = -1;
 722
 723     if (!(path = get_dosdevices_path( &p ))) return STATUS_NO_MEMORY;
 724
 725     EnterCriticalSection( &device_section );
 726     volume = find_matching_volume( udi, device, mount_point, type );
 727
 728     if (letter == -1)  /* auto-assign a letter */
 729     {
 730         letter = add_drive( device, type );
 731         if (letter == -1)
 732         {
 733             status = STATUS_OBJECT_NAME_COLLISION;
 734             goto done;
 735         }
 736
 737         LIST_FOR_EACH_ENTRY_SAFE( drive, next, &drives_list, struct dos_drive, entry )
 738         {
 739             if (drive->volume->udi && !strcmp( udi, drive->volume->udi )) goto found;
 740             if (drive->drive == letter) delete_dos_device( drive );
 741         }
 742     }
 743     else  /* simply reset the device symlink */
 744     {
 745         LIST_FOR_EACH_ENTRY( drive, &drives_list, struct dos_drive, entry )
 746             if (drive->drive == letter) break;
 747
 748         *p = 'a' + letter;
 749         if (&drive->entry == &drives_list) update_symlink( path, device, NULL );
 750         else
 751         {
 752             update_symlink( path, device, drive->volume->device->unix_device );
 753             delete_dos_device( drive );
 754         }
 755     }
 756
 757     if ((status = create_dos_device( volume, udi, letter, type, &drive ))) goto done;
 758
 759 found:
 760     if (!guid && !volume) guid = get_default_uuid( letter );
 761     if (!volume) volume = grab_volume( drive->volume );
 762     set_drive_info( drive, letter, volume );
 763     p[0] = 'a' + drive->drive;
 764     p[2] = 0;
 765     update_symlink( path, mount_point, volume->device->unix_mount );
 766     set_volume_info( volume, drive, device, mount_point, type, guid );
 767
 768     TRACE( "added device %c: udi %s for %s on %s type %u\n",
 769            'a' + drive->drive, wine_dbgstr_a(udi), wine_dbgstr_a(device),
 770            wine_dbgstr_a(mount_point), type );
 771
 772     /* hack: force the drive type in the registry */
 773     if (!RegCreateKeyW( HKEY_LOCAL_MACHINE, drives_keyW, &hkey ))
 774     {
 775         const WCHAR *type_name = drive_types[type];
 776         WCHAR name[3] = {'a',':',0};
 777
 778         name[0] += drive->drive;
 779         if (!type_name[0] && type == DEVICE_HARDDISK) type_name = drive_types[DEVICE_FLOPPY];
 780         if (type_name[0])
 781             RegSetValueExW( hkey, name, 0, REG_SZ, (const BYTE *)type_name,
 782                             (strlenW(type_name) + 1) * sizeof(WCHAR) );
 783         else
 784             RegDeleteValueW( hkey, name );
 785         RegCloseKey( hkey );
 786     }
 787
 788     if (udi) notify = drive->drive;
 789
 790 done:
 791     if (volume) release_volume( volume );
 792     LeaveCriticalSection( &device_section );
 793     RtlFreeHeap( GetProcessHeap(), 0, path );
 794     if (notify != -1) send_notify( notify, DBT_DEVICEARRIVAL );
 795     return status;
 796 }
 797
 798 /* remove an existing dos drive, by letter or udi */
 799 NTSTATUS remove_dos_device( int letter, const char *udi )
 800 {
 801     NTSTATUS status = STATUS_NO_SUCH_DEVICE;
 802     HKEY hkey;
 803     struct dos_drive *drive;
 804     char *path, *p;
 805     int notify = -1;
 806
 807     EnterCriticalSection( &device_section );
 808     LIST_FOR_EACH_ENTRY( drive, &drives_list, struct dos_drive, entry )
 809     {
 810         if (udi)
 811         {
 812             if (!drive->volume->udi) continue;
 813             if (strcmp( udi, drive->volume->udi )) continue;
 814             set_volume_udi( drive->volume, NULL );
 815         }
 816         else if (drive->drive != letter) continue;
 817
 818         if ((path = get_dosdevices_path( &p )))
 819         {
 820             p[0] = 'a' + drive->drive;
 821             p[2] = 0;
 822             unlink( path );
 823             RtlFreeHeap( GetProcessHeap(), 0, path );
 824         }
 825
 826         /* clear the registry key too */
 827         if (!RegOpenKeyW( HKEY_LOCAL_MACHINE, drives_keyW, &hkey ))
 828         {
 829             WCHAR name[3] = {'a',':',0};
 830             name[0] += drive->drive;
 831             RegDeleteValueW( hkey, name );
 832             RegCloseKey( hkey );
 833         }
 834
 835         if (udi && drive->volume->device->unix_mount) notify = drive->drive;
 836
 837         delete_dos_device( drive );
 838         status = STATUS_SUCCESS;
 839         break;
 840     }
 841     LeaveCriticalSection( &device_section );
 842     if (notify != -1) send_notify( notify, DBT_DEVICEREMOVECOMPLETE );
 843     return status;
 844 }
 845
 846 /* query information about an existing dos drive, by letter or udi */
 847 NTSTATUS query_dos_device( int letter, enum device_type *type, char **device, char **mount_point )
 848 {
 849     NTSTATUS status = STATUS_NO_SUCH_DEVICE;
 850     struct dos_drive *drive;
 851     struct disk_device *disk_device;
 852
 853     EnterCriticalSection( &device_section );
 854     LIST_FOR_EACH_ENTRY( drive, &drives_list, struct dos_drive, entry )
 855     {
 856         if (drive->drive != letter) continue;
 857         disk_device = drive->volume->device;
 858         if (type) *type = disk_device->type;
 859         if (device) *device = strdupA( disk_device->unix_device );
 860         if (mount_point) *mount_point = strdupA( disk_device->unix_mount );
 861         status = STATUS_SUCCESS;
 862         break;
 863     }
 864     LeaveCriticalSection( &device_section );
 865     return status;
 866 }
 867
 868 /* handler for ioctls on the harddisk device */
 869 static NTSTATUS WINAPI harddisk_ioctl( DEVICE_OBJECT *device, IRP *irp )
 870 {
 871     IO_STACK_LOCATION *irpsp = IoGetCurrentIrpStackLocation( irp );
 872     struct disk_device *dev = device->DeviceExtension;
 873
 874     TRACE( "ioctl %x insize %u outsize %u\n",
 875            irpsp->Parameters.DeviceIoControl.IoControlCode,
 876            irpsp->Parameters.DeviceIoControl.InputBufferLength,
 877            irpsp->Parameters.DeviceIoControl.OutputBufferLength );
 878
 879     EnterCriticalSection( &device_section );
 880
 881     switch(irpsp->Parameters.DeviceIoControl.IoControlCode)
 882     {
 883     case IOCTL_DISK_GET_DRIVE_GEOMETRY:
 884     {
 885         DISK_GEOMETRY info;
 886         DWORD len = min( sizeof(info), irpsp->Parameters.DeviceIoControl.OutputBufferLength );
 887
 888         info.Cylinders.QuadPart = 10000;
 889         info.MediaType = (dev->devnum.DeviceType == FILE_DEVICE_DISK) ? FixedMedia : RemovableMedia;
 890         info.TracksPerCylinder = 255;
 891         info.SectorsPerTrack = 63;
 892         info.BytesPerSector = 512;
 893         memcpy( irp->MdlAddress->StartVa, &info, len );
 894         irp->IoStatus.Information = len;
 895         irp->IoStatus.u.Status = STATUS_SUCCESS;
 896         break;
 897     }
 898     case IOCTL_STORAGE_GET_DEVICE_NUMBER:
 899     {
 900         DWORD len = min( sizeof(dev->devnum), irpsp->Parameters.DeviceIoControl.OutputBufferLength );
 901
 902         memcpy( irp->MdlAddress->StartVa, &dev->devnum, len );
 903         irp->IoStatus.Information = len;
 904         irp->IoStatus.u.Status = STATUS_SUCCESS;
 905         break;
 906     }
 907     case IOCTL_CDROM_READ_TOC:
 908         irp->IoStatus.u.Status = STATUS_INVALID_DEVICE_REQUEST;
 909         break;
 910     case IOCTL_VOLUME_GET_VOLUME_DISK_EXTENTS:
 911     {
 912         DWORD len = min( 32, irpsp->Parameters.DeviceIoControl.OutputBufferLength );
 913
 914         FIXME( "returning zero-filled buffer for IOCTL_VOLUME_GET_VOLUME_DISK_EXTENTS\n" );
 915         memset( irp->MdlAddress->StartVa, 0, len );
 916         irp->IoStatus.Information = len;
 917         irp->IoStatus.u.Status = STATUS_SUCCESS;
 918         break;
 919     }
 920     default:
 921         FIXME( "unsupported ioctl %x\n", irpsp->Parameters.DeviceIoControl.IoControlCode );
 922         irp->IoStatus.u.Status = STATUS_NOT_SUPPORTED;
 923         break;
 924     }
 925
 926     LeaveCriticalSection( &device_section );
 927     IoCompleteRequest( irp, IO_NO_INCREMENT );
 928     return irp->IoStatus.u.Status;
 929 }
 930
 931 /* driver entry point for the harddisk driver */
 932 NTSTATUS WINAPI harddisk_driver_entry( DRIVER_OBJECT *driver, UNICODE_STRING *path )
 933 {
 934     struct disk_device *device;
 935
 936     harddisk_driver = driver;
 937     driver->MajorFunction[IRP_MJ_DEVICE_CONTROL] = harddisk_ioctl;
 938
 939     /* create a harddisk0 device that isn't assigned to any drive */
 940     create_disk_device( DEVICE_HARDDISK, &device );
 941
 942     create_drive_devices();
 943
 944     return STATUS_SUCCESS;
 945 }