445 lines
16 KiB
C
445 lines
16 KiB
C
/*
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* Mount manager service implementation
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*
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* Copyright 2008 Alexandre Julliard
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include <stdarg.h>
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#include <unistd.h>
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#define NONAMELESSUNION
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#define NONAMELESSSTRUCT
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#include "ntstatus.h"
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#define WIN32_NO_STATUS
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#include "windef.h"
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#include "winbase.h"
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#include "winternl.h"
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#include "winioctl.h"
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#include "winreg.h"
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#include "ddk/wdm.h"
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#include "ddk/mountmgr.h"
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#include "wine/library.h"
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#include "wine/unicode.h"
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#include "wine/debug.h"
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WINE_DEFAULT_DEBUG_CHANNEL(mountmgr);
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#define MAX_DOS_DRIVES 26
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#define MAX_MOUNT_POINTS (2 * MAX_DOS_DRIVES)
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/* extra info for disk devices, stored in DeviceExtension */
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struct disk_device_info
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{
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UNICODE_STRING name; /* device name */
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};
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struct mount_point
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{
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DEVICE_OBJECT *device;
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UNICODE_STRING link; /* DOS device symlink */
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void *id; /* device unique id */
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unsigned int id_len;
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};
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static struct mount_point mount_points[MAX_MOUNT_POINTS];
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static HKEY mount_key;
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static inline UNICODE_STRING *get_device_name( DEVICE_OBJECT *dev )
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{
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return &((struct disk_device_info *)dev->DeviceExtension)->name;
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}
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/* read a Unix symlink; returned buffer must be freed by caller */
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static char *read_symlink( const char *path )
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{
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char *buffer;
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int ret, size = 128;
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for (;;)
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{
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if (!(buffer = RtlAllocateHeap( GetProcessHeap(), 0, size )))
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{
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SetLastError( ERROR_NOT_ENOUGH_MEMORY );
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return 0;
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}
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ret = readlink( path, buffer, size );
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if (ret == -1)
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{
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RtlFreeHeap( GetProcessHeap(), 0, buffer );
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return 0;
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}
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if (ret != size)
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{
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buffer[ret] = 0;
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return buffer;
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}
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RtlFreeHeap( GetProcessHeap(), 0, buffer );
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size *= 2;
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}
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}
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static NTSTATUS create_disk_device( DRIVER_OBJECT *driver, DWORD type, DEVICE_OBJECT **dev_obj )
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{
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static const WCHAR harddiskW[] = {'\\','D','e','v','i','c','e',
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'\\','H','a','r','d','d','i','s','k','V','o','l','u','m','e','%','u',0};
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static const WCHAR cdromW[] = {'\\','D','e','v','i','c','e','\\','C','d','R','o','m','%','u',0};
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static const WCHAR floppyW[] = {'\\','D','e','v','i','c','e','\\','F','l','o','p','p','y','%','u',0};
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UINT i, first = 0;
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NTSTATUS status = 0;
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const WCHAR *format;
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UNICODE_STRING name;
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struct disk_device_info *info;
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switch(type)
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{
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case DRIVE_REMOVABLE:
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format = floppyW;
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break;
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case DRIVE_CDROM:
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format = cdromW;
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break;
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case DRIVE_FIXED:
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default: /* FIXME */
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format = harddiskW;
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first = 1; /* harddisk volumes start counting from 1 */
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break;
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}
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name.MaximumLength = (strlenW(format) + 10) * sizeof(WCHAR);
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name.Buffer = RtlAllocateHeap( GetProcessHeap(), 0, name.MaximumLength );
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for (i = first; i < 32; i++)
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{
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sprintfW( name.Buffer, format, i );
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name.Length = strlenW(name.Buffer) * sizeof(WCHAR);
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status = IoCreateDevice( driver, sizeof(*info), &name, 0, 0, FALSE, dev_obj );
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if (status != STATUS_OBJECT_NAME_COLLISION) break;
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}
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if (!status)
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{
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info = (*dev_obj)->DeviceExtension;
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info->name = name;
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}
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else
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{
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FIXME( "IoCreateDevice %s got %x\n", debugstr_w(name.Buffer), status );
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RtlFreeUnicodeString( &name );
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}
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return status;
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}
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static NTSTATUS add_mount_point( DRIVER_OBJECT *driver, DWORD type, int drive,
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const void *id, unsigned int id_len )
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{
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static const WCHAR driveW[] = {'\\','D','o','s','D','e','v','i','c','e','s','\\','%','c',':',0};
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static const WCHAR volumeW[] = {'\\','?','?','\\','V','o','l','u','m','e','{',
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'%','0','8','x','-','%','0','4','x','-','%','0','4','x','-',
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'%','0','2','x','%','0','2','x','-','%','0','2','x','%','0','2','x',
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'%','0','2','x','%','0','2','x','%','0','2','x','%','0','2','x','}',0};
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WCHAR *drive_link, *volume_link;
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NTSTATUS status;
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GUID guid;
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UINT i;
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struct mount_point *mount_drive = NULL, *mount_volume = NULL;
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/* find two free mount points */
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for (i = 0; i < MAX_MOUNT_POINTS; i++)
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{
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if (mount_points[i].device) continue;
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if (!mount_drive)
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{
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mount_drive = &mount_points[i];
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continue;
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}
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mount_volume = &mount_points[i];
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break;
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}
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if (!mount_volume) return STATUS_NO_MEMORY;
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/* create the volume */
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memset( &guid, 0, sizeof(guid) ); /* FIXME */
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guid.Data4[7] = 'A' + drive;
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drive_link = RtlAllocateHeap( GetProcessHeap(), 0, sizeof(driveW) );
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volume_link = RtlAllocateHeap( GetProcessHeap(), 0, sizeof(volumeW) );
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sprintfW( drive_link, driveW, 'A' + drive );
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sprintfW( volume_link, volumeW, guid.Data1, guid.Data2, guid.Data3,
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guid.Data4[0], guid.Data4[1], guid.Data4[2], guid.Data4[3],
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guid.Data4[4], guid.Data4[5], guid.Data4[6], guid.Data4[7]);
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RtlInitUnicodeString( &mount_drive->link, drive_link );
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RtlInitUnicodeString( &mount_volume->link, volume_link );
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status = create_disk_device( driver, type, &mount_drive->device );
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if (status)
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{
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RtlFreeUnicodeString( &mount_drive->link );
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RtlFreeUnicodeString( &mount_volume->link );
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return status;
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}
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mount_volume->device = mount_drive->device; /* FIXME: incr ref count */
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mount_drive->id = RtlAllocateHeap( GetProcessHeap(), 0, id_len );
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mount_drive->id_len = id_len;
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memcpy( mount_drive->id, id, id_len );
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mount_volume->id = RtlAllocateHeap( GetProcessHeap(), 0, id_len );
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mount_volume->id_len = id_len;
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memcpy( mount_volume->id, id, id_len );
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IoCreateSymbolicLink( &mount_drive->link, get_device_name(mount_drive->device) );
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IoCreateSymbolicLink( &mount_volume->link, get_device_name(mount_volume->device) );
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TRACE( "created device %s symlinks %s %s\n", debugstr_w(get_device_name(mount_drive->device)->Buffer),
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debugstr_w(mount_drive->link.Buffer), debugstr_w(mount_volume->link.Buffer) );
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RegSetValueExW( mount_key, mount_drive->link.Buffer, 0, REG_BINARY,
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mount_drive->id, mount_drive->id_len );
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RegSetValueExW( mount_key, mount_volume->link.Buffer, 0, REG_BINARY,
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mount_volume->id, mount_volume->id_len );
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return STATUS_SUCCESS;
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}
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/* check if a given mount point matches the requested specs */
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static BOOL matching_mount_point( const struct mount_point *mount, const MOUNTMGR_MOUNT_POINT *spec )
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{
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if (spec->SymbolicLinkNameOffset)
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{
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const WCHAR *name = (const WCHAR *)((const char *)spec + spec->SymbolicLinkNameOffset);
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if (spec->SymbolicLinkNameLength != mount->link.Length) return FALSE;
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if (memicmpW( name, mount->link.Buffer, mount->link.Length/sizeof(WCHAR)))
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return FALSE;
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}
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if (spec->DeviceNameOffset)
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{
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const WCHAR *name = (const WCHAR *)((const char *)spec + spec->DeviceNameOffset);
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const UNICODE_STRING *dev_name = get_device_name( mount->device );
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if (spec->DeviceNameLength != dev_name->Length) return FALSE;
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if (memicmpW( name, dev_name->Buffer, dev_name->Length/sizeof(WCHAR)))
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return FALSE;
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}
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if (spec->UniqueIdOffset)
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{
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const void *id = ((const char *)spec + spec->UniqueIdOffset);
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if (spec->UniqueIdLength != mount->id_len) return FALSE;
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if (memcmp( id, mount->id, mount->id_len )) return FALSE;
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}
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return TRUE;
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}
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/* implementation of IOCTL_MOUNTMGR_QUERY_POINTS */
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static NTSTATUS query_mount_points( const void *in_buff, SIZE_T insize,
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void *out_buff, SIZE_T outsize, IO_STATUS_BLOCK *iosb )
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{
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UINT i, j, pos, size;
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const MOUNTMGR_MOUNT_POINT *input = in_buff;
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MOUNTMGR_MOUNT_POINTS *info = out_buff;
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UNICODE_STRING *dev_name;
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/* sanity checks */
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if (input->SymbolicLinkNameOffset + input->SymbolicLinkNameLength > insize ||
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input->UniqueIdOffset + input->UniqueIdLength > insize ||
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input->DeviceNameOffset + input->DeviceNameLength > insize ||
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input->SymbolicLinkNameOffset + input->SymbolicLinkNameLength < input->SymbolicLinkNameOffset ||
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input->UniqueIdOffset + input->UniqueIdLength < input->UniqueIdOffset ||
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input->DeviceNameOffset + input->DeviceNameLength < input->DeviceNameOffset)
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return STATUS_INVALID_PARAMETER;
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for (i = j = size = 0; i < MAX_MOUNT_POINTS; i++)
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{
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if (!mount_points[i].device) continue;
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if (!matching_mount_point( &mount_points[i], input )) continue;
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size += get_device_name(mount_points[i].device)->Length;
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size += mount_points[i].link.Length;
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j++;
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}
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pos = FIELD_OFFSET( MOUNTMGR_MOUNT_POINTS, MountPoints[j] );
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size += pos;
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if (size > outsize)
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{
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if (size >= sizeof(info->Size)) info->Size = size;
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iosb->Information = sizeof(info->Size);
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return STATUS_MORE_ENTRIES;
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}
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info->NumberOfMountPoints = j;
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for (i = j = 0; i < MAX_MOUNT_POINTS; i++)
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{
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if (!mount_points[i].device) continue;
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if (!matching_mount_point( &mount_points[i], input )) continue;
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info->MountPoints[j].UniqueIdOffset = 0; /* FIXME */
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info->MountPoints[j].UniqueIdLength = 0;
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dev_name = get_device_name( mount_points[i].device );
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info->MountPoints[j].DeviceNameOffset = pos;
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info->MountPoints[j].DeviceNameLength = dev_name->Length;
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memcpy( (char *)out_buff + pos, dev_name->Buffer, dev_name->Length );
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pos += dev_name->Length;
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info->MountPoints[j].SymbolicLinkNameOffset = pos;
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info->MountPoints[j].SymbolicLinkNameLength = mount_points[i].link.Length;
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memcpy( (char *)out_buff + pos, mount_points[i].link.Buffer, mount_points[i].link.Length );
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pos += mount_points[i].link.Length;
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j++;
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}
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info->Size = pos;
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iosb->Information = pos;
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return STATUS_SUCCESS;
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}
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/* handler for ioctls on the mount manager device */
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static NTSTATUS WINAPI mountmgr_ioctl( DEVICE_OBJECT *device, IRP *irp )
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{
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IO_STACK_LOCATION *irpsp = irp->Tail.Overlay.s.u.CurrentStackLocation;
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TRACE( "ioctl %x insize %u outsize %u\n",
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irpsp->Parameters.DeviceIoControl.IoControlCode,
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irpsp->Parameters.DeviceIoControl.InputBufferLength,
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irpsp->Parameters.DeviceIoControl.OutputBufferLength );
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switch(irpsp->Parameters.DeviceIoControl.IoControlCode)
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{
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case IOCTL_MOUNTMGR_QUERY_POINTS:
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if (irpsp->Parameters.DeviceIoControl.InputBufferLength < sizeof(MOUNTMGR_MOUNT_POINT))
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return STATUS_INVALID_PARAMETER;
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irp->IoStatus.u.Status = query_mount_points( irpsp->Parameters.DeviceIoControl.Type3InputBuffer,
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irpsp->Parameters.DeviceIoControl.InputBufferLength,
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irp->MdlAddress->StartVa,
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irpsp->Parameters.DeviceIoControl.OutputBufferLength,
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&irp->IoStatus );
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break;
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default:
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FIXME( "ioctl %x not supported\n", irpsp->Parameters.DeviceIoControl.IoControlCode );
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irp->IoStatus.u.Status = STATUS_NOT_SUPPORTED;
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break;
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}
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return irp->IoStatus.u.Status;
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}
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/* handler for ioctls on the harddisk device */
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static NTSTATUS WINAPI harddisk_ioctl( DEVICE_OBJECT *device, IRP *irp )
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{
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IO_STACK_LOCATION *irpsp = irp->Tail.Overlay.s.u.CurrentStackLocation;
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TRACE( "ioctl %x insize %u outsize %u\n",
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irpsp->Parameters.DeviceIoControl.IoControlCode,
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irpsp->Parameters.DeviceIoControl.InputBufferLength,
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irpsp->Parameters.DeviceIoControl.OutputBufferLength );
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switch(irpsp->Parameters.DeviceIoControl.IoControlCode)
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{
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default:
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FIXME( "unsupported ioctl %x\n", irpsp->Parameters.DeviceIoControl.IoControlCode );
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irp->IoStatus.u.Status = STATUS_NOT_SUPPORTED;
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break;
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}
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return irp->IoStatus.u.Status;
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}
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/* create mount points for mapped drives */
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static void create_drive_mount_points( DRIVER_OBJECT *driver )
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{
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const char *config_dir = wine_get_config_dir();
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char *buffer, *p, *link;
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unsigned int i;
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if ((buffer = RtlAllocateHeap( GetProcessHeap(), 0,
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strlen(config_dir) + sizeof("/dosdevices/a:") )))
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{
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strcpy( buffer, config_dir );
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strcat( buffer, "/dosdevices/a:" );
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p = buffer + strlen(buffer) - 2;
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for (i = 0; i < MAX_DOS_DRIVES; i++)
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{
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*p = 'a' + i;
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if (!(link = read_symlink( buffer ))) continue;
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add_mount_point( driver, DRIVE_FIXED, i, link, strlen(link) );
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RtlFreeHeap( GetProcessHeap(), 0, link );
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}
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RtlFreeHeap( GetProcessHeap(), 0, buffer );
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}
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}
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/* driver entry point for the harddisk driver */
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static NTSTATUS WINAPI harddisk_driver_entry( DRIVER_OBJECT *driver, UNICODE_STRING *path )
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{
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static const WCHAR mounted_devicesW[] = {'S','y','s','t','e','m','\\',
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'M','o','u','n','t','e','d','D','e','v','i','c','e','s',0};
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static const WCHAR harddisk0W[] = {'\\','D','e','v','i','c','e',
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'\\','H','a','r','d','d','i','s','k','0',0};
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static const WCHAR physdrive0W[] = {'\\','?','?','\\','P','h','y','s','i','c','a','l','D','r','i','v','e','0',0};
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UNICODE_STRING nameW, linkW;
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DEVICE_OBJECT *device;
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NTSTATUS status;
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driver->MajorFunction[IRP_MJ_DEVICE_CONTROL] = harddisk_ioctl;
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RegCreateKeyExW( HKEY_LOCAL_MACHINE, mounted_devicesW, 0, NULL,
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REG_OPTION_VOLATILE, KEY_ALL_ACCESS, NULL, &mount_key, NULL );
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RtlInitUnicodeString( &nameW, harddisk0W );
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RtlInitUnicodeString( &linkW, physdrive0W );
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if (!(status = IoCreateDevice( driver, 0, &nameW, 0, 0, FALSE, &device )))
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status = IoCreateSymbolicLink( &linkW, &nameW );
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if (status)
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{
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FIXME( "failed to create device error %x\n", status );
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return status;
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}
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create_drive_mount_points( driver );
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return status;
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}
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/* main entry point for the mount point manager driver */
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NTSTATUS WINAPI DriverEntry( DRIVER_OBJECT *driver, UNICODE_STRING *path )
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{
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static const WCHAR device_mountmgrW[] = {'\\','D','e','v','i','c','e','\\','M','o','u','n','t','P','o','i','n','t','M','a','n','a','g','e','r',0};
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static const WCHAR link_mountmgrW[] = {'\\','?','?','\\','M','o','u','n','t','P','o','i','n','t','M','a','n','a','g','e','r',0};
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static const WCHAR harddiskW[] = {'\\','D','r','i','v','e','r','\\','H','a','r','d','d','i','s','k',0};
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UNICODE_STRING nameW, linkW;
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DEVICE_OBJECT *device;
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NTSTATUS status;
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TRACE( "%s\n", debugstr_w(path->Buffer) );
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driver->MajorFunction[IRP_MJ_DEVICE_CONTROL] = mountmgr_ioctl;
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RtlInitUnicodeString( &nameW, device_mountmgrW );
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RtlInitUnicodeString( &linkW, link_mountmgrW );
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if (!(status = IoCreateDevice( driver, 0, &nameW, 0, 0, FALSE, &device )))
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status = IoCreateSymbolicLink( &linkW, &nameW );
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if (status)
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{
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FIXME( "failed to create device error %x\n", status );
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return status;
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}
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RtlInitUnicodeString( &nameW, harddiskW );
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status = IoCreateDriver( &nameW, harddisk_driver_entry );
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return status;
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}
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