dlls/kernelbase/volume.c

   1 /*
   2  * Volume management functions
   3  *
   4  * Copyright 1993 Erik Bos
   5  * Copyright 1996, 2004 Alexandre Julliard
   6  * Copyright 1999 Petr Tomasek
   7  * Copyright 2000 Andreas Mohr
   8  * Copyright 2003 Eric Pouech
   9  *
  10  * This library is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU Lesser General Public
  12  * License as published by the Free Software Foundation; either
  13  * version 2.1 of the License, or (at your option) any later version.
  14  *
  15  * This library is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18  * Lesser General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU Lesser General Public
  21  * License along with this library; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  23  */
  24
  25 #include <stdarg.h>
  26 #include <stdlib.h>
  27 #include <stdio.h>
  28
  29 #include "ntstatus.h"
  30 #define WIN32_NO_STATUS
  31 #include "windef.h"
  32 #include "winbase.h"
  33 #include "winnls.h"
  34 #include "winternl.h"
  35 #include "winioctl.h"
  36 #include "ntddcdrm.h"
  37 #define WINE_MOUNTMGR_EXTENSIONS
  38 #include "ddk/mountmgr.h"
  39 #include "ddk/wdm.h"
  40 #include "kernelbase.h"
  41 #include "wine/debug.h"
  42
  43 WINE_DEFAULT_DEBUG_CHANNEL(volume);
  44
  45 #define BLOCK_SIZE 2048
  46 #define SUPERBLOCK_SIZE BLOCK_SIZE
  47 #define SYMBOLIC_LINK_QUERY 0x0001
  48
  49 #define CDFRAMES_PERSEC         75
  50 #define CDFRAMES_PERMIN         (CDFRAMES_PERSEC * 60)
  51 #define FRAME_OF_ADDR(a)        ((a)[1] * CDFRAMES_PERMIN + (a)[2] * CDFRAMES_PERSEC + (a)[3])
  52 #define FRAME_OF_TOC(toc, idx)  FRAME_OF_ADDR((toc)->TrackData[(idx) - (toc)->FirstTrack].Address)
  53
  54 #define GETWORD(buf,off)  MAKEWORD(buf[(off)],buf[(off+1)])
  55 #define GETLONG(buf,off)  MAKELONG(GETWORD(buf,off),GETWORD(buf,off+2))
  56
  57 enum fs_type
  58 {
  59     FS_ERROR,    /* error accessing the device */
  60     FS_UNKNOWN,  /* unknown file system */
  61     FS_FAT1216,
  62     FS_FAT32,
  63     FS_ISO9660,
  64     FS_UDF       /* For reference [E] = Ecma-167.pdf, [U] = udf260.pdf */
  65 };
  66
  67 /* read the contents of an NT symlink object */
  68 static NTSTATUS read_nt_symlink( const WCHAR *name, WCHAR *target, DWORD size )
  69 {
  70     NTSTATUS status;
  71     OBJECT_ATTRIBUTES attr;
  72     UNICODE_STRING nameW;
  73     HANDLE handle;
  74
  75     attr.Length = sizeof(attr);
  76     attr.RootDirectory = 0;
  77     attr.Attributes = OBJ_CASE_INSENSITIVE;
  78     attr.ObjectName = &nameW;
  79     attr.SecurityDescriptor = NULL;
  80     attr.SecurityQualityOfService = NULL;
  81     RtlInitUnicodeString( &nameW, name );
  82
  83     if (!(status = NtOpenSymbolicLinkObject( &handle, SYMBOLIC_LINK_QUERY, &attr )))
  84     {
  85         UNICODE_STRING targetW;
  86         targetW.Buffer = target;
  87         targetW.MaximumLength = (size - 1) * sizeof(WCHAR);
  88         status = NtQuerySymbolicLinkObject( handle, &targetW, NULL );
  89         if (!status) target[targetW.Length / sizeof(WCHAR)] = 0;
  90         NtClose( handle );
  91     }
  92     return status;
  93 }
  94
  95 /* open a handle to a device root */
  96 static BOOL open_device_root( LPCWSTR root, HANDLE *handle )
  97 {
  98     UNICODE_STRING nt_name;
  99     OBJECT_ATTRIBUTES attr;
 100     IO_STATUS_BLOCK io;
 101     NTSTATUS status;
 102
 103     if (!root) root = L"\\";
 104     if (!RtlDosPathNameToNtPathName_U( root, &nt_name, NULL, NULL ))
 105     {
 106         SetLastError( ERROR_PATH_NOT_FOUND );
 107         return FALSE;
 108     }
 109     attr.Length = sizeof(attr);
 110     attr.RootDirectory = 0;
 111     attr.Attributes = OBJ_CASE_INSENSITIVE;
 112     attr.ObjectName = &nt_name;
 113     attr.SecurityDescriptor = NULL;
 114     attr.SecurityQualityOfService = NULL;
 115
 116     status = NtOpenFile( handle, SYNCHRONIZE, &attr, &io, 0,
 117                          FILE_DIRECTORY_FILE | FILE_SYNCHRONOUS_IO_NONALERT );
 118     RtlFreeUnicodeString( &nt_name );
 119     return set_ntstatus( status );
 120 }
 121
 122 /* query the type of a drive from the mount manager */
 123 static DWORD get_mountmgr_drive_type( LPCWSTR root )
 124 {
 125     HANDLE mgr;
 126     struct mountmgr_unix_drive data;
 127     DWORD br;
 128
 129     memset( &data, 0, sizeof(data) );
 130     if (root) data.letter = root[0];
 131     else
 132     {
 133         WCHAR curdir[MAX_PATH];
 134         GetCurrentDirectoryW( MAX_PATH, curdir );
 135         if (curdir[1] != ':' || curdir[2] != '\\') return DRIVE_UNKNOWN;
 136         data.letter = curdir[0];
 137     }
 138
 139     mgr = CreateFileW( MOUNTMGR_DOS_DEVICE_NAME, GENERIC_READ,
 140                        FILE_SHARE_READ|FILE_SHARE_WRITE, NULL, OPEN_EXISTING, 0, 0 );
 141     if (mgr == INVALID_HANDLE_VALUE) return DRIVE_UNKNOWN;
 142
 143     if (!DeviceIoControl( mgr, IOCTL_MOUNTMGR_QUERY_UNIX_DRIVE, &data, sizeof(data), &data,
 144                           sizeof(data), &br, NULL ) && GetLastError() != ERROR_MORE_DATA)
 145         data.type = DRIVE_UNKNOWN;
 146
 147     CloseHandle( mgr );
 148     return data.type;
 149 }
 150
 151
 152 /***********************************************************************
 153  *           GetVolumeInformationW   (kernelbase.@)
 154  */
 155 BOOL WINAPI DECLSPEC_HOTPATCH GetVolumeInformationW( LPCWSTR root, LPWSTR label, DWORD label_len,
 156                                                      DWORD *serial, DWORD *filename_len, DWORD *flags,
 157                                                      LPWSTR fsname, DWORD fsname_len )
 158 {
 159     HANDLE handle;
 160     NTSTATUS status;
 161     UNICODE_STRING nt_name;
 162     IO_STATUS_BLOCK io;
 163     OBJECT_ATTRIBUTES attr;
 164     unsigned int i;
 165     BOOL ret = FALSE;
 166
 167     if (!root) root = L"\\";
 168     if (!RtlDosPathNameToNtPathName_U( root, &nt_name, NULL, NULL ))
 169     {
 170         SetLastError( ERROR_PATH_NOT_FOUND );
 171         return FALSE;
 172     }
 173     /* there must be exactly one backslash in the name, at the end */
 174     for (i = 4; i < nt_name.Length / sizeof(WCHAR); i++) if (nt_name.Buffer[i] == '\\') break;
 175     if (i != nt_name.Length / sizeof(WCHAR) - 1)
 176     {
 177         /* check if root contains an explicit subdir */
 178         if (root[0] && root[1] == ':') root += 2;
 179         while (*root == '\\') root++;
 180         if (wcschr( root, '\\' ))
 181             SetLastError( ERROR_DIR_NOT_ROOT );
 182         else
 183             SetLastError( ERROR_INVALID_NAME );
 184         goto done;
 185     }
 186
 187     attr.Length = sizeof(attr);
 188     attr.RootDirectory = 0;
 189     attr.Attributes = OBJ_CASE_INSENSITIVE;
 190     attr.ObjectName = &nt_name;
 191     attr.SecurityDescriptor = NULL;
 192     attr.SecurityQualityOfService = NULL;
 193
 194     nt_name.Length -= sizeof(WCHAR);  /* without trailing slash */
 195     status = NtOpenFile( &handle, GENERIC_READ | SYNCHRONIZE, &attr, &io, FILE_SHARE_READ | FILE_SHARE_WRITE,
 196                          FILE_NON_DIRECTORY_FILE | FILE_SYNCHRONOUS_IO_NONALERT );
 197     nt_name.Length += sizeof(WCHAR);
 198
 199     if (status)
 200     {
 201         TRACE( "cannot open device %s: %x\n", debugstr_w(nt_name.Buffer), status );
 202         if (status == STATUS_ACCESS_DENIED)
 203             MESSAGE( "wine: Read access denied for device %s, FS volume label and serial are not available.\n", debugstr_w(nt_name.Buffer) );
 204         status = NtOpenFile( &handle, SYNCHRONIZE, &attr, &io, 0,
 205                                       FILE_DIRECTORY_FILE | FILE_SYNCHRONOUS_IO_NONALERT );
 206     }
 207
 208     if (!set_ntstatus( status )) goto done;
 209
 210     ret = GetVolumeInformationByHandleW( handle, label, label_len, serial, filename_len, flags,
 211                                          fsname, fsname_len );
 212     NtClose( handle );
 213
 214 done:
 215     RtlFreeUnicodeString( &nt_name );
 216     return ret;
 217 }
 218
 219
 220 /***********************************************************************
 221  *           GetVolumeInformationA   (kernelbase.@)
 222  */
 223 BOOL WINAPI GetVolumeInformationA( LPCSTR root, LPSTR label,
 224                                    DWORD label_len, DWORD *serial,
 225                                    DWORD *filename_len, DWORD *flags,
 226                                    LPSTR fsname, DWORD fsname_len )
 227 {
 228     WCHAR *rootW = NULL;
 229     LPWSTR labelW, fsnameW;
 230     BOOL ret;
 231
 232     if (root && !(rootW = file_name_AtoW( root, FALSE ))) return FALSE;
 233
 234     labelW = label ? HeapAlloc(GetProcessHeap(), 0, label_len * sizeof(WCHAR)) : NULL;
 235     fsnameW = fsname ? HeapAlloc(GetProcessHeap(), 0, fsname_len * sizeof(WCHAR)) : NULL;
 236
 237     if ((ret = GetVolumeInformationW(rootW, labelW, label_len, serial,
 238                                     filename_len, flags, fsnameW, fsname_len)))
 239     {
 240         if (label) file_name_WtoA( labelW, -1, label, label_len );
 241         if (fsname) file_name_WtoA( fsnameW, -1, fsname, fsname_len );
 242     }
 243
 244     HeapFree( GetProcessHeap(), 0, labelW );
 245     HeapFree( GetProcessHeap(), 0, fsnameW );
 246     return ret;
 247 }
 248
 249
 250 /***********************************************************************
 251  *           GetVolumeNameForVolumeMountPointW   (kernelbase.@)
 252  */
 253 BOOL WINAPI GetVolumeNameForVolumeMountPointW( LPCWSTR path, LPWSTR volume, DWORD size )
 254 {
 255     MOUNTMGR_MOUNT_POINT *input = NULL, *o1;
 256     MOUNTMGR_MOUNT_POINTS *output = NULL;
 257     WCHAR *p;
 258     char *r;
 259     DWORD i, i_size = 1024, o_size = 1024;
 260     WCHAR *nonpersist_name;
 261     WCHAR symlink_name[MAX_PATH];
 262     NTSTATUS status;
 263     HANDLE mgr = INVALID_HANDLE_VALUE;
 264     BOOL ret = FALSE;
 265     DWORD br;
 266
 267     TRACE("(%s, %p, %x)\n", debugstr_w(path), volume, size);
 268     if (path[lstrlenW(path)-1] != '\\')
 269     {
 270         SetLastError( ERROR_INVALID_NAME );
 271         return FALSE;
 272     }
 273
 274     if (size < 50)
 275     {
 276         SetLastError( ERROR_FILENAME_EXCED_RANGE );
 277         return FALSE;
 278     }
 279     /* if length of input is > 3 then it must be a mounted folder */
 280     if (lstrlenW(path) > 3)
 281     {
 282         FIXME("Mounted Folders are not yet supported\n");
 283         SetLastError( ERROR_NOT_A_REPARSE_POINT );
 284         return FALSE;
 285     }
 286
 287     mgr = CreateFileW( MOUNTMGR_DOS_DEVICE_NAME, 0, FILE_SHARE_READ,
 288                         NULL, OPEN_EXISTING, 0, 0 );
 289     if (mgr == INVALID_HANDLE_VALUE) return FALSE;
 290
 291     if (!(input = HeapAlloc( GetProcessHeap(), 0, i_size )))
 292     {
 293         SetLastError( ERROR_NOT_ENOUGH_MEMORY );
 294         goto err_ret;
 295     }
 296
 297     if (!(output = HeapAlloc( GetProcessHeap(), 0, o_size )))
 298     {
 299         SetLastError( ERROR_NOT_ENOUGH_MEMORY );
 300         goto err_ret;
 301     }
 302
 303     /* construct the symlink name as "\DosDevices\C:" */
 304     lstrcpyW( symlink_name, L"\\DosDevices\\" );
 305     lstrcatW( symlink_name, path );
 306     symlink_name[lstrlenW(symlink_name)-1] = 0;
 307
 308     /* Take the mount point and get the "nonpersistent name" */
 309     /* We will then take that and get the volume name        */
 310     nonpersist_name = (WCHAR *)(input + 1);
 311     status = read_nt_symlink( symlink_name, nonpersist_name, i_size - sizeof(*input) );
 312     TRACE("read_nt_symlink got stat=%x, for %s, got <%s>\n", status,
 313             debugstr_w(symlink_name), debugstr_w(nonpersist_name));
 314     if (status != STATUS_SUCCESS)
 315     {
 316         SetLastError( ERROR_FILE_NOT_FOUND );
 317         goto err_ret;
 318     }
 319
 320     /* Now take the "nonpersistent name" and ask the mountmgr  */
 321     /* to give us all the mount points.  One of them will be   */
 322     /* the volume name  (format of \??\Volume{).               */
 323     memset( input, 0, sizeof(*input) );  /* clear all input parameters */
 324     input->DeviceNameOffset = sizeof(*input);
 325     input->DeviceNameLength = lstrlenW( nonpersist_name) * sizeof(WCHAR);
 326     i_size = input->DeviceNameOffset + input->DeviceNameLength;
 327
 328     output->Size = o_size;
 329
 330     /* now get the true volume name from the mountmgr   */
 331     if (!DeviceIoControl( mgr, IOCTL_MOUNTMGR_QUERY_POINTS, input, i_size,
 332                         output, o_size, &br, NULL ))
 333         goto err_ret;
 334
 335     /* Verify and return the data, note string is not null terminated  */
 336     TRACE("found %d matching mount points\n", output->NumberOfMountPoints);
 337     if (output->NumberOfMountPoints < 1)
 338     {
 339         SetLastError( ERROR_NO_VOLUME_ID );
 340         goto err_ret;
 341     }
 342     o1 = &output->MountPoints[0];
 343
 344     /* look for the volume name in returned values  */
 345     for(i=0;i<output->NumberOfMountPoints;i++)
 346     {
 347         p = (WCHAR*)((char *)output + o1->SymbolicLinkNameOffset);
 348         r = (char *)output + o1->UniqueIdOffset;
 349         TRACE("found symlink=%s, unique=%s, devname=%s\n",
 350             debugstr_wn(p, o1->SymbolicLinkNameLength/sizeof(WCHAR)),
 351             debugstr_an(r, o1->UniqueIdLength),
 352             debugstr_wn((WCHAR*)((char *)output + o1->DeviceNameOffset),
 353                             o1->DeviceNameLength/sizeof(WCHAR)));
 354
 355         if (!wcsncmp( p, L"\\??\\Volume{", wcslen(L"\\??\\Volume{") ))
 356         {
 357             /* is there space in the return variable ?? */
 358             if ((o1->SymbolicLinkNameLength/sizeof(WCHAR))+2 > size)
 359             {
 360                 SetLastError( ERROR_FILENAME_EXCED_RANGE );
 361                 goto err_ret;
 362             }
 363             memcpy( volume, p, o1->SymbolicLinkNameLength );
 364             volume[o1->SymbolicLinkNameLength / sizeof(WCHAR)] = 0;
 365             lstrcatW( volume, L"\\" );
 366             /* change second char from '?' to '\'  */
 367             volume[1] = '\\';
 368             ret = TRUE;
 369             break;
 370         }
 371         o1++;
 372     }
 373
 374 err_ret:
 375     HeapFree( GetProcessHeap(), 0, input );
 376     HeapFree( GetProcessHeap(), 0, output );
 377     CloseHandle( mgr );
 378     return ret;
 379 }
 380
 381
 382 /***********************************************************************
 383  *           DefineDosDeviceW       (kernelbase.@)
 384  */
 385 BOOL WINAPI DECLSPEC_HOTPATCH DefineDosDeviceW( DWORD flags, const WCHAR *device, const WCHAR *target )
 386 {
 387     WCHAR link_name[15] = L"\\DosDevices\\";
 388     UNICODE_STRING nt_name, nt_target;
 389     OBJECT_ATTRIBUTES attr;
 390     NTSTATUS status;
 391     HANDLE handle;
 392
 393     TRACE("%#x, %s, %s\n", flags, debugstr_w(device), debugstr_w(target));
 394
 395     if (flags & ~(DDD_RAW_TARGET_PATH | DDD_REMOVE_DEFINITION))
 396         FIXME("Ignoring flags %#x.\n", flags & ~(DDD_RAW_TARGET_PATH | DDD_REMOVE_DEFINITION));
 397
 398     lstrcatW( link_name, device );
 399     RtlInitUnicodeString( &nt_name, link_name );
 400     InitializeObjectAttributes( &attr, &nt_name, OBJ_CASE_INSENSITIVE | OBJ_PERMANENT, 0, NULL );
 401     if (flags & DDD_REMOVE_DEFINITION)
 402     {
 403         if (!set_ntstatus( NtOpenSymbolicLinkObject( &handle, 0, &attr ) ))
 404             return FALSE;
 405
 406         status = NtMakeTemporaryObject( handle );
 407         NtClose( handle );
 408
 409         return set_ntstatus( status );
 410     }
 411
 412     if (!(flags & DDD_RAW_TARGET_PATH))
 413     {
 414         if (!RtlDosPathNameToNtPathName_U( target, &nt_target, NULL, NULL))
 415         {
 416             SetLastError( ERROR_PATH_NOT_FOUND );
 417             return FALSE;
 418         }
 419     }
 420     else
 421         RtlInitUnicodeString( &nt_target, target );
 422
 423     if (!(status = NtCreateSymbolicLinkObject( &handle, SYMBOLIC_LINK_ALL_ACCESS, &attr, &nt_target )))
 424         NtClose( handle );
 425     return set_ntstatus( status );
 426 }
 427
 428
 429 /***********************************************************************
 430  *           QueryDosDeviceW   (kernelbase.@)
 431  *
 432  * returns array of strings terminated by \0, terminated by \0
 433  */
 434 DWORD WINAPI QueryDosDeviceW( LPCWSTR devname, LPWSTR target, DWORD bufsize )
 435 {
 436     UNICODE_STRING nt_name;
 437     NTSTATUS status;
 438
 439     if (!bufsize)
 440     {
 441         SetLastError( ERROR_INSUFFICIENT_BUFFER );
 442         return 0;
 443     }
 444
 445     if (devname)
 446     {
 447         WCHAR name[8];
 448         WCHAR *buffer;
 449         DWORD dosdev, ret = 0;
 450
 451         if ((dosdev = RtlIsDosDeviceName_U( devname )))
 452         {
 453             memcpy( name, devname + HIWORD(dosdev)/sizeof(WCHAR), LOWORD(dosdev) );
 454             name[LOWORD(dosdev)/sizeof(WCHAR)] = 0;
 455             devname = name;
 456         }
 457
 458         if (!(buffer = HeapAlloc( GetProcessHeap(), 0, sizeof(L"\\DosDevices\\") + lstrlenW(devname)*sizeof(WCHAR) )))
 459         {
 460             SetLastError( ERROR_OUTOFMEMORY );
 461             return 0;
 462         }
 463         lstrcpyW( buffer, L"\\DosDevices\\" );
 464         lstrcatW( buffer, devname );
 465         status = read_nt_symlink( buffer, target, bufsize );
 466         HeapFree( GetProcessHeap(), 0, buffer );
 467         if (!set_ntstatus( status )) return 0;
 468         ret = lstrlenW( target ) + 1;
 469         if (ret < bufsize) target[ret++] = 0;  /* add an extra null */
 470         return ret;
 471     }
 472     else  /* return a list of all devices */
 473     {
 474         OBJECT_ATTRIBUTES attr;
 475         HANDLE handle;
 476         WCHAR *p = target;
 477
 478         RtlInitUnicodeString( &nt_name, L"\\DosDevices\\" );
 479         nt_name.Length -= sizeof(WCHAR);  /* without trailing slash */
 480         attr.Length = sizeof(attr);
 481         attr.RootDirectory = 0;
 482         attr.ObjectName = &nt_name;
 483         attr.Attributes = OBJ_CASE_INSENSITIVE;
 484         attr.SecurityDescriptor = NULL;
 485         attr.SecurityQualityOfService = NULL;
 486         status = NtOpenDirectoryObject( &handle, FILE_LIST_DIRECTORY, &attr );
 487         if (!status)
 488         {
 489             char data[1024];
 490             DIRECTORY_BASIC_INFORMATION *info = (DIRECTORY_BASIC_INFORMATION *)data;
 491             ULONG ctx = 0, len;
 492
 493             while (!NtQueryDirectoryObject( handle, info, sizeof(data), 1, 0, &ctx, &len ))
 494             {
 495                 if (p + info->ObjectName.Length/sizeof(WCHAR) + 1 >= target + bufsize)
 496                 {
 497                     SetLastError( ERROR_INSUFFICIENT_BUFFER );
 498                     NtClose( handle );
 499                     return 0;
 500                 }
 501                 memcpy( p, info->ObjectName.Buffer, info->ObjectName.Length );
 502                 p += info->ObjectName.Length/sizeof(WCHAR);
 503                 *p++ = 0;
 504             }
 505             NtClose( handle );
 506         }
 507
 508         *p++ = 0;  /* terminating null */
 509         return p - target;
 510     }
 511 }
 512
 513
 514 /***********************************************************************
 515  *           GetLogicalDrives   (kernelbase.@)
 516  */
 517 DWORD WINAPI DECLSPEC_HOTPATCH GetLogicalDrives(void)
 518 {
 519     OBJECT_ATTRIBUTES attr;
 520     UNICODE_STRING nt_name;
 521     DWORD bitmask = 0;
 522     NTSTATUS status;
 523     HANDLE handle;
 524
 525     RtlInitUnicodeString( &nt_name, L"\\DosDevices\\" );
 526     nt_name.Length -= sizeof(WCHAR);  /* without trailing slash */
 527     attr.Length = sizeof(attr);
 528     attr.RootDirectory = 0;
 529     attr.ObjectName = &nt_name;
 530     attr.Attributes = OBJ_CASE_INSENSITIVE;
 531     attr.SecurityDescriptor = NULL;
 532     attr.SecurityQualityOfService = NULL;
 533     status = NtOpenDirectoryObject( &handle, FILE_LIST_DIRECTORY, &attr );
 534     if (!status)
 535     {
 536         char data[1024];
 537         DIRECTORY_BASIC_INFORMATION *info = (DIRECTORY_BASIC_INFORMATION *)data;
 538         ULONG ctx = 0, len;
 539
 540         while (!NtQueryDirectoryObject( handle, info, sizeof(data), 1, 0, &ctx, &len ))
 541             if(info->ObjectName.Length == 2*sizeof(WCHAR) && info->ObjectName.Buffer[1] == ':')
 542                 bitmask |= 1 << (info->ObjectName.Buffer[0] - 'A');
 543
 544         NtClose( handle );
 545     }
 546
 547     return bitmask;
 548 }
 549
 550
 551 /***********************************************************************
 552  *           GetLogicalDriveStringsW   (kernelbase.@)
 553  */
 554 UINT WINAPI DECLSPEC_HOTPATCH GetLogicalDriveStringsW( UINT len, LPWSTR buffer )
 555 {
 556     DWORD drives = GetLogicalDrives();
 557     UINT drive, count;
 558
 559     for (drive = count = 0; drive < 26; drive++) if (drives & (1 << drive)) count++;
 560     if ((count * 4) + 1 > len) return count * 4 + 1;
 561
 562     for (drive = 0; drive < 26; drive++)
 563     {
 564         if (drives & (1 << drive))
 565         {
 566             *buffer++ = 'A' + drive;
 567             *buffer++ = ':';
 568             *buffer++ = '\\';
 569             *buffer++ = 0;
 570         }
 571     }
 572     *buffer = 0;
 573     return count * 4;
 574 }
 575
 576
 577 /***********************************************************************
 578  *           GetDriveTypeW   (kernelbase.@)
 579  */
 580 UINT WINAPI DECLSPEC_HOTPATCH GetDriveTypeW( LPCWSTR root )
 581 {
 582     FILE_FS_DEVICE_INFORMATION info;
 583     IO_STATUS_BLOCK io;
 584     NTSTATUS status;
 585     HANDLE handle;
 586     UINT ret;
 587
 588     if (!open_device_root( root, &handle ))
 589     {
 590         /* CD ROM devices do not necessarily have a volume, but a drive type */
 591         ret = get_mountmgr_drive_type( root );
 592         if (ret == DRIVE_CDROM || ret == DRIVE_REMOVABLE)
 593             return ret;
 594
 595         return DRIVE_NO_ROOT_DIR;
 596     }
 597
 598     status = NtQueryVolumeInformationFile( handle, &io, &info, sizeof(info), FileFsDeviceInformation );
 599     NtClose( handle );
 600     if (status != STATUS_SUCCESS)
 601     {
 602         SetLastError( RtlNtStatusToDosError(status) );
 603         ret = DRIVE_UNKNOWN;
 604     }
 605     else
 606     {
 607         switch (info.DeviceType)
 608         {
 609         case FILE_DEVICE_CD_ROM_FILE_SYSTEM:  ret = DRIVE_CDROM; break;
 610         case FILE_DEVICE_VIRTUAL_DISK:        ret = DRIVE_RAMDISK; break;
 611         case FILE_DEVICE_NETWORK_FILE_SYSTEM: ret = DRIVE_REMOTE; break;
 612         case FILE_DEVICE_DISK_FILE_SYSTEM:
 613             if (info.Characteristics & FILE_REMOTE_DEVICE) ret = DRIVE_REMOTE;
 614             else if (info.Characteristics & FILE_REMOVABLE_MEDIA) ret = DRIVE_REMOVABLE;
 615             else if ((ret = get_mountmgr_drive_type( root )) == DRIVE_UNKNOWN) ret = DRIVE_FIXED;
 616             break;
 617         default:
 618             ret = DRIVE_UNKNOWN;
 619             break;
 620         }
 621     }
 622     TRACE( "%s -> %d\n", debugstr_w(root), ret );
 623     return ret;
 624 }
 625
 626
 627 /***********************************************************************
 628  *           GetDriveTypeA   (kernelbase.@)
 629  */
 630 UINT WINAPI DECLSPEC_HOTPATCH GetDriveTypeA( LPCSTR root )
 631 {
 632     WCHAR *rootW = NULL;
 633
 634     if (root && !(rootW = file_name_AtoW( root, FALSE ))) return DRIVE_NO_ROOT_DIR;
 635     return GetDriveTypeW( rootW );
 636 }
 637
 638
 639 /***********************************************************************
 640  *           GetDiskFreeSpaceExW   (kernelbase.@)
 641  */
 642 BOOL WINAPI DECLSPEC_HOTPATCH GetDiskFreeSpaceExW( LPCWSTR root, PULARGE_INTEGER avail,
 643                                                    PULARGE_INTEGER total, PULARGE_INTEGER totalfree )
 644 {
 645     FILE_FS_SIZE_INFORMATION info;
 646     IO_STATUS_BLOCK io;
 647     NTSTATUS status;
 648     HANDLE handle;
 649     UINT units;
 650
 651     TRACE( "%s,%p,%p,%p\n", debugstr_w(root), avail, total, totalfree );
 652
 653     if (!open_device_root( root, &handle )) return FALSE;
 654
 655     status = NtQueryVolumeInformationFile( handle, &io, &info, sizeof(info), FileFsSizeInformation );
 656     NtClose( handle );
 657     if (!set_ntstatus( status )) return FALSE;
 658
 659     units = info.SectorsPerAllocationUnit * info.BytesPerSector;
 660     if (total) total->QuadPart = info.TotalAllocationUnits.QuadPart * units;
 661     if (totalfree) totalfree->QuadPart = info.AvailableAllocationUnits.QuadPart * units;
 662     /* FIXME: this one should take quotas into account */
 663     if (avail) avail->QuadPart = info.AvailableAllocationUnits.QuadPart * units;
 664     return TRUE;
 665 }
 666
 667
 668 /***********************************************************************
 669  *           GetDiskFreeSpaceExA   (kernelbase.@)
 670  */
 671 BOOL WINAPI DECLSPEC_HOTPATCH GetDiskFreeSpaceExA( LPCSTR root, PULARGE_INTEGER avail,
 672                                                    PULARGE_INTEGER total, PULARGE_INTEGER totalfree )
 673 {
 674     WCHAR *rootW = NULL;
 675
 676     if (root && !(rootW = file_name_AtoW( root, FALSE ))) return FALSE;
 677     return GetDiskFreeSpaceExW( rootW, avail, total, totalfree );
 678 }
 679
 680
 681 /***********************************************************************
 682  *           GetDiskFreeSpaceW   (kernelbase.@)
 683  */
 684 BOOL WINAPI DECLSPEC_HOTPATCH GetDiskFreeSpaceW( LPCWSTR root, LPDWORD cluster_sectors,
 685                                                  LPDWORD sector_bytes, LPDWORD free_clusters,
 686                                                  LPDWORD total_clusters )
 687 {
 688     FILE_FS_SIZE_INFORMATION info;
 689     IO_STATUS_BLOCK io;
 690     NTSTATUS status;
 691     HANDLE handle;
 692     UINT units;
 693
 694     TRACE( "%s,%p,%p,%p,%p\n", debugstr_w(root),
 695            cluster_sectors, sector_bytes, free_clusters, total_clusters );
 696
 697     if (!open_device_root( root, &handle )) return FALSE;
 698
 699     status = NtQueryVolumeInformationFile( handle, &io, &info, sizeof(info), FileFsSizeInformation );
 700     NtClose( handle );
 701     if (!set_ntstatus( status )) return FALSE;
 702
 703     units = info.SectorsPerAllocationUnit * info.BytesPerSector;
 704
 705     if( GetVersion() & 0x80000000) {    /* win3.x, 9x, ME */
 706         /* cap the size and available at 2GB as per specs */
 707         if (info.TotalAllocationUnits.QuadPart * units > 0x7fffffff) {
 708             info.TotalAllocationUnits.QuadPart = 0x7fffffff / units;
 709             if (info.AvailableAllocationUnits.QuadPart * units > 0x7fffffff)
 710                 info.AvailableAllocationUnits.QuadPart = 0x7fffffff / units;
 711         }
 712         /* nr. of clusters is always <= 65335 */
 713         while( info.TotalAllocationUnits.QuadPart > 65535 ) {
 714             info.TotalAllocationUnits.QuadPart /= 2;
 715             info.AvailableAllocationUnits.QuadPart /= 2;
 716             info.SectorsPerAllocationUnit *= 2;
 717         }
 718     }
 719
 720     if (cluster_sectors) *cluster_sectors = info.SectorsPerAllocationUnit;
 721     if (sector_bytes) *sector_bytes = info.BytesPerSector;
 722     if (free_clusters) *free_clusters = info.AvailableAllocationUnits.u.LowPart;
 723     if (total_clusters) *total_clusters = info.TotalAllocationUnits.u.LowPart;
 724     TRACE("%#08x, %#08x, %#08x, %#08x\n", info.SectorsPerAllocationUnit, info.BytesPerSector,
 725           info.AvailableAllocationUnits.u.LowPart, info.TotalAllocationUnits.u.LowPart);
 726     return TRUE;
 727 }
 728
 729
 730 /***********************************************************************
 731  *           GetDiskFreeSpaceA   (kernelbase.@)
 732  */
 733 BOOL WINAPI DECLSPEC_HOTPATCH GetDiskFreeSpaceA( LPCSTR root, LPDWORD cluster_sectors,
 734                                                  LPDWORD sector_bytes, LPDWORD free_clusters,
 735                                                  LPDWORD total_clusters )
 736 {
 737     WCHAR *rootW = NULL;
 738
 739     if (root && !(rootW = file_name_AtoW( root, FALSE ))) return FALSE;
 740     return GetDiskFreeSpaceW( rootW, cluster_sectors, sector_bytes, free_clusters, total_clusters );
 741 }
 742
 743
 744 static BOOL is_dos_path( const UNICODE_STRING *path )
 745 {
 746     static const WCHAR global_prefix[4] = {'\\','?','?','\\'};
 747     return path->Length >= 7 * sizeof(WCHAR)
 748             && !memcmp(path->Buffer, global_prefix, sizeof(global_prefix))
 749             && path->Buffer[5] == ':' && path->Buffer[6] == '\\';
 750 }
 751
 752 /* resolve all symlinks in a path in-place; return FALSE if allocation failed */
 753 static BOOL resolve_symlink( UNICODE_STRING *path )
 754 {
 755     OBJECT_NAME_INFORMATION *info;
 756     OBJECT_ATTRIBUTES attr;
 757     IO_STATUS_BLOCK io;
 758     NTSTATUS status;
 759     HANDLE file;
 760     ULONG size;
 761
 762     InitializeObjectAttributes( &attr, path, OBJ_CASE_INSENSITIVE, 0, NULL );
 763     if (NtOpenFile( &file, SYNCHRONIZE, &attr, &io, FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
 764             FILE_DIRECTORY_FILE | FILE_SYNCHRONOUS_IO_NONALERT ))
 765         return TRUE;
 766
 767     if (NtQueryObject( file, ObjectNameInformation, NULL, 0, &size ) != STATUS_INFO_LENGTH_MISMATCH)
 768     {
 769         NtClose( file );
 770         return TRUE;
 771     }
 772
 773     if (!(info = HeapAlloc( GetProcessHeap(), 0, size )))
 774     {
 775         NtClose( file );
 776         return FALSE;
 777     }
 778
 779     status = NtQueryObject( file, ObjectNameInformation, info, size, NULL );
 780     NtClose( file );
 781     if (status)
 782         return TRUE;
 783
 784     RtlFreeUnicodeString( path );
 785     status = RtlDuplicateUnicodeString( 0, &info->Name, path );
 786     HeapFree( GetProcessHeap(), 0, info );
 787     return !status;
 788 }
 789
 790 /***********************************************************************
 791  *           GetVolumePathNameW   (kernelbase.@)
 792  */
 793 BOOL WINAPI DECLSPEC_HOTPATCH GetVolumePathNameW( const WCHAR *path, WCHAR *volume_path, DWORD length )
 794 {
 795     FILE_ATTRIBUTE_TAG_INFORMATION attr_info;
 796     FILE_BASIC_INFORMATION basic_info;
 797     OBJECT_ATTRIBUTES attr;
 798     UNICODE_STRING nt_name;
 799     NTSTATUS status;
 800
 801     if (path && !wcsncmp(path, L"\\??\\", 4))
 802     {
 803         WCHAR current_drive[MAX_PATH];
 804
 805         GetCurrentDirectoryW( ARRAY_SIZE(current_drive), current_drive );
 806         if (length >= 3)
 807         {
 808             WCHAR ret_path[4] = {current_drive[0], ':', '\\', 0};
 809             lstrcpynW( volume_path, ret_path, length );
 810             return TRUE;
 811         }
 812
 813         SetLastError( ERROR_FILENAME_EXCED_RANGE );
 814         return FALSE;
 815     }
 816
 817     if (!volume_path || !length || !RtlDosPathNameToNtPathName_U( path, &nt_name, NULL, NULL ))
 818     {
 819         SetLastError( ERROR_INVALID_PARAMETER );
 820         return FALSE;
 821     }
 822
 823     if (!is_dos_path( &nt_name ))
 824     {
 825         RtlFreeUnicodeString( &nt_name );
 826         WARN("invalid path %s\n", debugstr_w(path));
 827         SetLastError( ERROR_INVALID_NAME );
 828         return FALSE;
 829     }
 830
 831     InitializeObjectAttributes( &attr, &nt_name, OBJ_CASE_INSENSITIVE, 0, NULL );
 832
 833     while (nt_name.Length > 7 * sizeof(WCHAR))
 834     {
 835         IO_STATUS_BLOCK io;
 836         HANDLE file;
 837
 838         if (!NtQueryAttributesFile( &attr, &basic_info )
 839                 && (basic_info.FileAttributes & FILE_ATTRIBUTE_REPARSE_POINT)
 840                 && (basic_info.FileAttributes & FILE_ATTRIBUTE_DIRECTORY)
 841                 && !NtOpenFile( &file, SYNCHRONIZE | FILE_READ_ATTRIBUTES, &attr, &io,
 842                         FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
 843                         FILE_OPEN_REPARSE_POINT | FILE_DIRECTORY_FILE | FILE_SYNCHRONOUS_IO_NONALERT ))
 844         {
 845             status = NtQueryInformationFile( file, &io, &attr_info,
 846                     sizeof(attr_info), FileAttributeTagInformation );
 847             NtClose( file );
 848             if (!status)
 849             {
 850
 851                 if (attr_info.ReparseTag == IO_REPARSE_TAG_MOUNT_POINT)
 852                     break;
 853
 854                 if (!resolve_symlink( &nt_name ))
 855                 {
 856                     SetLastError( ERROR_OUTOFMEMORY );
 857                     return FALSE;
 858                 }
 859             }
 860         }
 861
 862         if (nt_name.Buffer[(nt_name.Length / sizeof(WCHAR)) - 1] == '\\')
 863             nt_name.Length -= sizeof(WCHAR);
 864         while (nt_name.Length && nt_name.Buffer[(nt_name.Length / sizeof(WCHAR)) - 1] != '\\')
 865             nt_name.Length -= sizeof(WCHAR);
 866     }
 867
 868     nt_name.Buffer[nt_name.Length / sizeof(WCHAR)] = 0;
 869
 870     if (NtQueryAttributesFile( &attr, &basic_info ))
 871     {
 872         RtlFreeUnicodeString( &nt_name );
 873         WARN("nonexistent path %s -> %s\n", debugstr_w(path), debugstr_w( nt_name.Buffer ));
 874         SetLastError( ERROR_FILE_NOT_FOUND );
 875         return FALSE;
 876     }
 877
 878     if (!wcsncmp(path, L"\\\\.\\", 4) || !wcsncmp(path, L"\\\\?\\", 4))
 879     {
 880         if (length >= nt_name.Length / sizeof(WCHAR))
 881         {
 882             memcpy(volume_path, path, 4 * sizeof(WCHAR));
 883             lstrcpynW( volume_path + 4, nt_name.Buffer + 4, length - 4 );
 884
 885             TRACE("%s -> %s\n", debugstr_w(path), debugstr_w(volume_path));
 886
 887             RtlFreeUnicodeString( &nt_name );
 888             return TRUE;
 889         }
 890     }
 891     else if (length >= (nt_name.Length / sizeof(WCHAR)) - 4)
 892     {
 893         lstrcpynW( volume_path, nt_name.Buffer + 4, length );
 894         volume_path[0] = towupper(volume_path[0]);
 895
 896         TRACE("%s -> %s\n", debugstr_w(path), debugstr_w(volume_path));
 897
 898         RtlFreeUnicodeString( &nt_name );
 899         return TRUE;
 900     }
 901
 902     RtlFreeUnicodeString( &nt_name );
 903     SetLastError( ERROR_FILENAME_EXCED_RANGE );
 904     return FALSE;
 905 }
 906
 907
 908 static MOUNTMGR_MOUNT_POINTS *query_mount_points( HANDLE mgr, MOUNTMGR_MOUNT_POINT *input, DWORD insize )
 909 {
 910     MOUNTMGR_MOUNT_POINTS *output;
 911     DWORD outsize = 1024;
 912     DWORD br;
 913
 914     for (;;)
 915     {
 916         if (!(output = HeapAlloc( GetProcessHeap(), 0, outsize )))
 917         {
 918             SetLastError( ERROR_NOT_ENOUGH_MEMORY );
 919             return NULL;
 920         }
 921         if (DeviceIoControl( mgr, IOCTL_MOUNTMGR_QUERY_POINTS, input, insize, output, outsize, &br, NULL )) break;
 922         outsize = output->Size;
 923         HeapFree( GetProcessHeap(), 0, output );
 924         if (GetLastError() != ERROR_MORE_DATA) return NULL;
 925     }
 926     return output;
 927 }
 928
 929 /***********************************************************************
 930  *           GetVolumePathNamesForVolumeNameW   (kernelbase.@)
 931  */
 932 BOOL WINAPI DECLSPEC_HOTPATCH GetVolumePathNamesForVolumeNameW( LPCWSTR volumename, LPWSTR volumepathname,
 933                                                                 DWORD buflen, PDWORD returnlen )
 934 {
 935     static const WCHAR dosdevicesW[] = {'\\','D','o','s','D','e','v','i','c','e','s','\\'};
 936     HANDLE mgr;
 937     DWORD len, size;
 938     MOUNTMGR_MOUNT_POINT *spec;
 939     MOUNTMGR_MOUNT_POINTS *link, *target = NULL;
 940     WCHAR *name, *path;
 941     BOOL ret = FALSE;
 942     UINT i, j;
 943
 944     TRACE("%s, %p, %u, %p\n", debugstr_w(volumename), volumepathname, buflen, returnlen);
 945
 946     if (!volumename || (len = lstrlenW( volumename )) != 49)
 947     {
 948         SetLastError( ERROR_INVALID_NAME );
 949         return FALSE;
 950     }
 951     mgr = CreateFileW( MOUNTMGR_DOS_DEVICE_NAME, 0, FILE_SHARE_READ|FILE_SHARE_WRITE, NULL, OPEN_EXISTING, 0, 0 );
 952     if (mgr == INVALID_HANDLE_VALUE) return FALSE;
 953
 954     size = sizeof(*spec) + sizeof(WCHAR) * (len - 1); /* remove trailing backslash */
 955     if (!(spec = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, size ))) goto done;
 956     spec->SymbolicLinkNameOffset = sizeof(*spec);
 957     spec->SymbolicLinkNameLength = size - sizeof(*spec);
 958     name = (WCHAR *)((char *)spec + spec->SymbolicLinkNameOffset);
 959     memcpy( name, volumename, size - sizeof(*spec) );
 960     name[1] = '?'; /* map \\?\ to \??\ */
 961
 962     target = query_mount_points( mgr, spec, size );
 963     HeapFree( GetProcessHeap(), 0, spec );
 964     if (!target)
 965     {
 966         goto done;
 967     }
 968     if (!target->NumberOfMountPoints)
 969     {
 970         SetLastError( ERROR_FILE_NOT_FOUND );
 971         goto done;
 972     }
 973     len = 0;
 974     path = volumepathname;
 975     for (i = 0; i < target->NumberOfMountPoints; i++)
 976     {
 977         link = NULL;
 978         if (target->MountPoints[i].DeviceNameOffset)
 979         {
 980             const WCHAR *device = (const WCHAR *)((const char *)target + target->MountPoints[i].DeviceNameOffset);
 981             USHORT device_len = target->MountPoints[i].DeviceNameLength;
 982
 983             size = sizeof(*spec) + device_len;
 984             if (!(spec = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, size ))) goto done;
 985             spec->DeviceNameOffset = sizeof(*spec);
 986             spec->DeviceNameLength = device_len;
 987             memcpy( (char *)spec + spec->DeviceNameOffset, device, device_len );
 988
 989             link = query_mount_points( mgr, spec, size );
 990             HeapFree( GetProcessHeap(), 0, spec );
 991         }
 992         else if (target->MountPoints[i].UniqueIdOffset)
 993         {
 994             const WCHAR *id = (const WCHAR *)((const char *)target + target->MountPoints[i].UniqueIdOffset);
 995             USHORT id_len = target->MountPoints[i].UniqueIdLength;
 996
 997             size = sizeof(*spec) + id_len;
 998             if (!(spec = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, size ))) goto done;
 999             spec->UniqueIdOffset = sizeof(*spec);
1000             spec->UniqueIdLength = id_len;
1001             memcpy( (char *)spec + spec->UniqueIdOffset, id, id_len );
1002
1003             link = query_mount_points( mgr, spec, size );
1004             HeapFree( GetProcessHeap(), 0, spec );
1005         }
1006         if (!link) continue;
1007         for (j = 0; j < link->NumberOfMountPoints; j++)
1008         {
1009             const WCHAR *linkname;
1010
1011             if (!link->MountPoints[j].SymbolicLinkNameOffset) continue;
1012             linkname = (const WCHAR *)((const char *)link + link->MountPoints[j].SymbolicLinkNameOffset);
1013
1014             if (link->MountPoints[j].SymbolicLinkNameLength == sizeof(dosdevicesW) + 2 * sizeof(WCHAR) &&
1015                 !wcsnicmp( linkname, dosdevicesW, ARRAY_SIZE( dosdevicesW )))
1016             {
1017                 len += 4;
1018                 if (volumepathname && len < buflen)
1019                 {
1020                     path[0] = linkname[ARRAY_SIZE( dosdevicesW )];
1021                     path[1] = ':';
1022                     path[2] = '\\';
1023                     path[3] = 0;
1024                     path += 4;
1025                 }
1026             }
1027         }
1028         HeapFree( GetProcessHeap(), 0, link );
1029     }
1030     if (buflen <= len) SetLastError( ERROR_MORE_DATA );
1031     else if (volumepathname)
1032     {
1033         volumepathname[len] = 0;
1034         ret = TRUE;
1035     }
1036     if (returnlen) *returnlen = len + 1;
1037
1038 done:
1039     HeapFree( GetProcessHeap(), 0, target );
1040     CloseHandle( mgr );
1041     return ret;
1042 }
1043
1044
1045 /***********************************************************************
1046  *           FindFirstVolumeW   (kernelbase.@)
1047  */
1048 HANDLE WINAPI DECLSPEC_HOTPATCH FindFirstVolumeW( LPWSTR volume, DWORD len )
1049 {
1050     DWORD size = 1024;
1051     DWORD br;
1052     HANDLE mgr = CreateFileW( MOUNTMGR_DOS_DEVICE_NAME, 0, FILE_SHARE_READ|FILE_SHARE_WRITE,
1053                               NULL, OPEN_EXISTING, 0, 0 );
1054     if (mgr == INVALID_HANDLE_VALUE) return INVALID_HANDLE_VALUE;
1055
1056     for (;;)
1057     {
1058         MOUNTMGR_MOUNT_POINT input;
1059         MOUNTMGR_MOUNT_POINTS *output;
1060
1061         if (!(output = HeapAlloc( GetProcessHeap(), 0, size )))
1062         {
1063             SetLastError( ERROR_NOT_ENOUGH_MEMORY );
1064             break;
1065         }
1066         memset( &input, 0, sizeof(input) );
1067
1068         if (!DeviceIoControl( mgr, IOCTL_MOUNTMGR_QUERY_POINTS, &input, sizeof(input),
1069                               output, size, &br, NULL ))
1070         {
1071             if (GetLastError() != ERROR_MORE_DATA) break;
1072             size = output->Size;
1073             HeapFree( GetProcessHeap(), 0, output );
1074             continue;
1075         }
1076         CloseHandle( mgr );
1077         /* abuse the Size field to store the current index */
1078         output->Size = 0;
1079         if (!FindNextVolumeW( output, volume, len ))
1080         {
1081             HeapFree( GetProcessHeap(), 0, output );
1082             return INVALID_HANDLE_VALUE;
1083         }
1084         return output;
1085     }
1086     CloseHandle( mgr );
1087     return INVALID_HANDLE_VALUE;
1088 }
1089
1090
1091 /***********************************************************************
1092  *           FindNextVolumeW   (kernelbase.@)
1093  */
1094 BOOL WINAPI DECLSPEC_HOTPATCH FindNextVolumeW( HANDLE handle, LPWSTR volume, DWORD len )
1095 {
1096     MOUNTMGR_MOUNT_POINTS *data = handle;
1097
1098     while (data->Size < data->NumberOfMountPoints)
1099     {
1100         static const WCHAR volumeW[] = {'\\','?','?','\\','V','o','l','u','m','e','{',};
1101         WCHAR *link = (WCHAR *)((char *)data + data->MountPoints[data->Size].SymbolicLinkNameOffset);
1102         DWORD size = data->MountPoints[data->Size].SymbolicLinkNameLength;
1103         data->Size++;
1104         /* skip non-volumes */
1105         if (size < sizeof(volumeW) || memcmp( link, volumeW, sizeof(volumeW) )) continue;
1106         if (size + sizeof(WCHAR) >= len * sizeof(WCHAR))
1107         {
1108             SetLastError( ERROR_FILENAME_EXCED_RANGE );
1109             return FALSE;
1110         }
1111         memcpy( volume, link, size );
1112         volume[1] = '\\';  /* map \??\ to \\?\ */
1113         volume[size / sizeof(WCHAR)] = '\\';  /* Windows appends a backslash */
1114         volume[size / sizeof(WCHAR) + 1] = 0;
1115         TRACE( "returning entry %u %s\n", data->Size - 1, debugstr_w(volume) );
1116         return TRUE;
1117     }
1118     SetLastError( ERROR_NO_MORE_FILES );
1119     return FALSE;
1120 }
1121
1122
1123 /***********************************************************************
1124  *           FindVolumeClose   (kernelbase.@)
1125  */
1126 BOOL WINAPI DECLSPEC_HOTPATCH FindVolumeClose( HANDLE handle )
1127 {
1128     return HeapFree( GetProcessHeap(), 0, handle );
1129 }
1130
1131
1132 /***********************************************************************
1133  *           DeleteVolumeMountPointW (kernelbase.@)
1134  */
1135 BOOL WINAPI /* DECLSPEC_HOTPATCH */ DeleteVolumeMountPointW( LPCWSTR mountpoint )
1136 {
1137     FIXME("(%s), stub!\n", debugstr_w(mountpoint));
1138     return FALSE;
1139 }
1140
1141
1142 /***********************************************************************
1143  *           GetVolumeInformationByHandleW (kernelbase.@)
1144  */
1145 BOOL WINAPI GetVolumeInformationByHandleW( HANDLE handle, WCHAR *label, DWORD label_len,
1146                                            DWORD *serial, DWORD *filename_len, DWORD *flags,
1147                                            WCHAR *fsname, DWORD fsname_len )
1148 {
1149     IO_STATUS_BLOCK io;
1150
1151     TRACE( "%p\n", handle );
1152
1153     if (label || serial)
1154     {
1155         char buffer[sizeof(FILE_FS_VOLUME_INFORMATION) + MAX_PATH * sizeof(WCHAR)];
1156         FILE_FS_VOLUME_INFORMATION *info = (FILE_FS_VOLUME_INFORMATION *)buffer;
1157
1158         if (!set_ntstatus( NtQueryVolumeInformationFile( handle, &io, info, sizeof(buffer),
1159                                                          FileFsVolumeInformation ) ))
1160             return FALSE;
1161
1162         if (label)
1163         {
1164             if (label_len < info->VolumeLabelLength / sizeof(WCHAR) + 1)
1165             {
1166                 SetLastError( ERROR_BAD_LENGTH );
1167                 return FALSE;
1168             }
1169             memcpy( label, info->VolumeLabel, info->VolumeLabelLength );
1170             label[info->VolumeLabelLength / sizeof(WCHAR)] = 0;
1171         }
1172         if (serial) *serial = info->VolumeSerialNumber;
1173     }
1174
1175     if (filename_len || flags || fsname)
1176     {
1177         char buffer[sizeof(FILE_FS_ATTRIBUTE_INFORMATION) + MAX_PATH * sizeof(WCHAR)];
1178         FILE_FS_ATTRIBUTE_INFORMATION *info = (FILE_FS_ATTRIBUTE_INFORMATION *)buffer;
1179
1180         if (!set_ntstatus( NtQueryVolumeInformationFile( handle, &io, info, sizeof(buffer),
1181                                                          FileFsAttributeInformation ) ))
1182             return FALSE;
1183
1184         if (fsname)
1185         {
1186             if (fsname_len < info->FileSystemNameLength / sizeof(WCHAR) + 1)
1187             {
1188                 SetLastError( ERROR_BAD_LENGTH );
1189                 return FALSE;
1190             }
1191             memcpy( fsname, info->FileSystemName, info->FileSystemNameLength );
1192             fsname[info->FileSystemNameLength / sizeof(WCHAR)] = 0;
1193         }
1194         if (filename_len) *filename_len = info->MaximumComponentNameLength;
1195         if (flags) *flags = info->FileSystemAttributes;
1196     }
1197
1198     return TRUE;
1199 }