Sweden-Number/dlls/mountmgr.sys/mountmgr.c

445 lines
16 KiB
C

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