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

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/*
* Dynamic devices support
*
* Copyright 2006 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 "config.h"
#include "wine/port.h"
#include <assert.h>
#include <errno.h>
#include <stdarg.h>
#include <stdio.h>
#include <sys/time.h>
#include "mountmgr.h"
#include "winreg.h"
#include "winuser.h"
#include "dbt.h"
#include "wine/library.h"
#include "wine/list.h"
#include "wine/unicode.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(mountmgr);
#define MAX_DOS_DRIVES 26
static const WCHAR drive_types[][8] =
{
{ 0 }, /* DEVICE_UNKNOWN */
{ 0 }, /* DEVICE_HARDDISK */
{'h','d',0}, /* DEVICE_HARDDISK_VOL */
{'f','l','o','p','p','y',0}, /* DEVICE_FLOPPY */
{'c','d','r','o','m',0}, /* DEVICE_CDROM */
{'n','e','t','w','o','r','k',0}, /* DEVICE_NETWORK */
{'r','a','m','d','i','s','k',0} /* DEVICE_RAMDISK */
};
static const WCHAR drives_keyW[] = {'S','o','f','t','w','a','r','e','\\',
'W','i','n','e','\\','D','r','i','v','e','s',0};
struct dos_drive
{
struct list entry; /* entry in drives list */
char *udi; /* unique identifier for dynamic drives */
int drive; /* drive letter (0 = A: etc.) */
enum device_type type; /* drive type */
DEVICE_OBJECT *device; /* disk device allocated for this drive */
UNICODE_STRING name; /* device name */
UNICODE_STRING symlink; /* device symlink if any */
STORAGE_DEVICE_NUMBER devnum; /* device number info */
struct mount_point *dosdev; /* DosDevices mount point */
struct mount_point *volume; /* Volume{xxx} mount point */
char *unix_device; /* unix device path */
char *unix_mount; /* unix mount point path */
};
static struct list drives_list = LIST_INIT(drives_list);
static DRIVER_OBJECT *harddisk_driver;
static char *get_dosdevices_path( char **drive )
{
const char *config_dir = wine_get_config_dir();
size_t len = strlen(config_dir) + sizeof("/dosdevices/a::");
char *path = HeapAlloc( GetProcessHeap(), 0, len );
if (path)
{
strcpy( path, config_dir );
strcat( path, "/dosdevices/a::" );
*drive = path + len - 4;
}
return path;
}
static char *strdupA( const char *str )
{
char *ret;
if (!str) return NULL;
if ((ret = RtlAllocateHeap( GetProcessHeap(), 0, strlen(str) + 1 ))) strcpy( ret, str );
return ret;
}
/* 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;
}
}
/* send notification about a change to a given drive */
static void send_notify( int drive, int code )
{
DWORD_PTR result;
DEV_BROADCAST_VOLUME info;
info.dbcv_size = sizeof(info);
info.dbcv_devicetype = DBT_DEVTYP_VOLUME;
info.dbcv_reserved = 0;
info.dbcv_unitmask = 1 << drive;
info.dbcv_flags = DBTF_MEDIA;
result = BroadcastSystemMessageW( BSF_FORCEIFHUNG|BSF_QUERY, NULL,
WM_DEVICECHANGE, code, (LPARAM)&info );
}
/* create the disk device for a given drive */
static NTSTATUS create_disk_device( const char *udi, enum device_type type, struct dos_drive **drive_ret )
{
static const WCHAR harddiskvolW[] = {'\\','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 harddiskW[] = {'\\','D','e','v','i','c','e','\\','H','a','r','d','d','i','s','k','%','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};
static const WCHAR ramdiskW[] = {'\\','D','e','v','i','c','e','\\','R','a','m','d','i','s','k','%','u',0};
static const WCHAR physdriveW[] = {'\\','?','?','\\','P','h','y','s','i','c','a','l','D','r','i','v','e','%','u',0};
UINT i, first = 0;
NTSTATUS status = 0;
const WCHAR *format = NULL;
UNICODE_STRING name;
DEVICE_OBJECT *dev_obj;
struct dos_drive *drive;
switch(type)
{
case DEVICE_UNKNOWN:
case DEVICE_HARDDISK:
case DEVICE_NETWORK: /* FIXME */
format = harddiskW;
break;
case DEVICE_HARDDISK_VOL:
format = harddiskvolW;
first = 1; /* harddisk volumes start counting from 1 */
break;
case DEVICE_FLOPPY:
format = floppyW;
break;
case DEVICE_CDROM:
format = cdromW;
break;
case DEVICE_RAMDISK:
format = ramdiskW;
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( harddisk_driver, sizeof(*drive), &name, 0, 0, FALSE, &dev_obj );
if (status != STATUS_OBJECT_NAME_COLLISION) break;
}
if (!status)
{
drive = dev_obj->DeviceExtension;
drive->drive = -1;
drive->device = dev_obj;
drive->name = name;
drive->type = type;
drive->dosdev = NULL;
drive->volume = NULL;
drive->unix_device = NULL;
drive->unix_mount = NULL;
drive->symlink.Buffer = NULL;
if (udi)
{
if (!(drive->udi = HeapAlloc( GetProcessHeap(), 0, strlen(udi)+1 )))
{
RtlFreeUnicodeString( &name );
IoDeleteDevice( drive->device );
return STATUS_NO_MEMORY;
}
strcpy( drive->udi, udi );
}
switch (type)
{
case DEVICE_FLOPPY:
case DEVICE_RAMDISK:
drive->devnum.DeviceType = FILE_DEVICE_DISK;
drive->devnum.DeviceNumber = i;
drive->devnum.PartitionNumber = ~0u;
break;
case DEVICE_CDROM:
drive->devnum.DeviceType = FILE_DEVICE_CD_ROM;
drive->devnum.DeviceNumber = i;
drive->devnum.PartitionNumber = ~0u;
break;
case DEVICE_UNKNOWN:
case DEVICE_HARDDISK:
case DEVICE_NETWORK: /* FIXME */
{
UNICODE_STRING symlink;
symlink.MaximumLength = sizeof(physdriveW) + 10 * sizeof(WCHAR);
if ((symlink.Buffer = RtlAllocateHeap( GetProcessHeap(), 0, symlink.MaximumLength)))
{
sprintfW( symlink.Buffer, physdriveW, i );
symlink.Length = strlenW(symlink.Buffer) * sizeof(WCHAR);
if (!IoCreateSymbolicLink( &symlink, &name )) drive->symlink = symlink;
}
drive->devnum.DeviceType = FILE_DEVICE_DISK;
drive->devnum.DeviceNumber = i;
drive->devnum.PartitionNumber = 0;
}
break;
case DEVICE_HARDDISK_VOL:
drive->devnum.DeviceType = FILE_DEVICE_DISK;
drive->devnum.DeviceNumber = 0;
drive->devnum.PartitionNumber = i;
break;
}
list_add_tail( &drives_list, &drive->entry );
*drive_ret = drive;
TRACE( "created device %s\n", debugstr_w(name.Buffer) );
}
else
{
FIXME( "IoCreateDevice %s got %x\n", debugstr_w(name.Buffer), status );
RtlFreeUnicodeString( &name );
}
return status;
}
/* delete the disk device for a given drive */
static void delete_disk_device( struct dos_drive *drive )
{
TRACE( "deleting device %s\n", debugstr_w(drive->name.Buffer) );
list_remove( &drive->entry );
if (drive->dosdev) delete_mount_point( drive->dosdev );
if (drive->volume) delete_mount_point( drive->volume );
if (drive->symlink.Buffer)
{
IoDeleteSymbolicLink( &drive->symlink );
RtlFreeUnicodeString( &drive->symlink );
}
RtlFreeHeap( GetProcessHeap(), 0, drive->unix_device );
RtlFreeHeap( GetProcessHeap(), 0, drive->unix_mount );
RtlFreeHeap( GetProcessHeap(), 0, drive->udi );
RtlFreeUnicodeString( &drive->name );
IoDeleteDevice( drive->device );
}
/* set or change the drive letter for an existing drive */
static void set_drive_letter( struct dos_drive *drive, int letter )
{
void *id = NULL;
unsigned int id_len = 0;
if (drive->drive == letter) return;
if (drive->dosdev) delete_mount_point( drive->dosdev );
if (drive->volume) delete_mount_point( drive->volume );
drive->drive = letter;
if (letter == -1) return;
if (drive->unix_mount)
{
id = drive->unix_mount;
id_len = strlen( drive->unix_mount ) + 1;
}
drive->dosdev = add_dosdev_mount_point( drive->device, &drive->name, letter, id, id_len );
drive->volume = add_volume_mount_point( drive->device, &drive->name, letter, id, id_len );
}
static inline int is_valid_device( struct stat *st )
{
#if defined(linux) || defined(__sun__)
return S_ISBLK( st->st_mode );
#else
/* disks are char devices on *BSD */
return S_ISCHR( st->st_mode );
#endif
}
/* find or create a DOS drive for the corresponding device */
static int add_drive( const char *device, enum device_type type )
{
char *path, *p;
char in_use[26];
struct stat dev_st, drive_st;
int drive, first, last, avail = 0;
if (stat( device, &dev_st ) == -1 || !is_valid_device( &dev_st )) return -1;
if (!(path = get_dosdevices_path( &p ))) return -1;
memset( in_use, 0, sizeof(in_use) );
switch (type)
{
case DEVICE_FLOPPY:
first = 0;
last = 2;
break;
case DEVICE_CDROM:
first = 3;
last = 26;
break;
default:
first = 2;
last = 26;
break;
}
while (avail != -1)
{
avail = -1;
for (drive = first; drive < last; drive++)
{
if (in_use[drive]) continue; /* already checked */
*p = 'a' + drive;
if (stat( path, &drive_st ) == -1)
{
if (lstat( path, &drive_st ) == -1 && errno == ENOENT) /* this is a candidate */
{
if (avail == -1)
{
p[2] = 0;
/* if mount point symlink doesn't exist either, it's available */
if (lstat( path, &drive_st ) == -1 && errno == ENOENT) avail = drive;
p[2] = ':';
}
}
else in_use[drive] = 1;
}
else
{
in_use[drive] = 1;
if (!is_valid_device( &drive_st )) continue;
if (dev_st.st_rdev == drive_st.st_rdev) goto done;
}
}
if (avail != -1)
{
/* try to use the one we found */
drive = avail;
*p = 'a' + drive;
if (symlink( device, path ) != -1) goto done;
/* failed, retry the search */
}
}
drive = -1;
done:
HeapFree( GetProcessHeap(), 0, path );
return drive;
}
static BOOL set_unix_mount_point( struct dos_drive *drive, const char *mount_point )
{
char *path, *p;
BOOL modified = FALSE;
if (!(path = get_dosdevices_path( &p ))) return FALSE;
p[0] = 'a' + drive->drive;
p[2] = 0;
if (mount_point && mount_point[0])
{
/* try to avoid unlinking if already set correctly */
if (!drive->unix_mount || strcmp( drive->unix_mount, mount_point ))
{
unlink( path );
symlink( mount_point, path );
modified = TRUE;
}
RtlFreeHeap( GetProcessHeap(), 0, drive->unix_mount );
drive->unix_mount = strdupA( mount_point );
if (drive->dosdev) set_mount_point_id( drive->dosdev, mount_point, strlen(mount_point) + 1 );
if (drive->volume) set_mount_point_id( drive->volume, mount_point, strlen(mount_point) + 1 );
}
else
{
if (unlink( path ) != -1) modified = TRUE;
RtlFreeHeap( GetProcessHeap(), 0, drive->unix_mount );
drive->unix_mount = NULL;
if (drive->dosdev) set_mount_point_id( drive->dosdev, NULL, 0 );
if (drive->volume) set_mount_point_id( drive->volume, NULL, 0 );
}
HeapFree( GetProcessHeap(), 0, path );
return modified;
}
/* create devices for mapped drives */
static void create_drive_devices(void)
{
char *path, *p, *link, *device;
struct dos_drive *drive;
unsigned int i;
HKEY drives_key;
enum device_type drive_type;
WCHAR driveW[] = {'a',':',0};
if (!(path = get_dosdevices_path( &p ))) return;
if (RegOpenKeyW( HKEY_LOCAL_MACHINE, drives_keyW, &drives_key )) drives_key = 0;
for (i = 0; i < MAX_DOS_DRIVES; i++)
{
p[0] = 'a' + i;
p[2] = 0;
if (!(link = read_symlink( path ))) continue;
p[2] = ':';
device = read_symlink( path );
drive_type = i < 2 ? DEVICE_FLOPPY : DEVICE_HARDDISK_VOL;
if (drives_key)
{
WCHAR buffer[32];
DWORD j, type, size = sizeof(buffer);
driveW[0] = 'a' + i;
if (!RegQueryValueExW( drives_key, driveW, NULL, &type, (BYTE *)buffer, &size ) &&
type == REG_SZ)
{
for (j = 0; j < sizeof(drive_types)/sizeof(drive_types[0]); j++)
if (drive_types[j][0] && !strcmpiW( buffer, drive_types[j] ))
{
drive_type = j;
break;
}
if (drive_type == DEVICE_FLOPPY && i >= 2) drive_type = DEVICE_HARDDISK;
}
}
if (!create_disk_device( NULL, drive_type, &drive ))
{
drive->unix_mount = link;
drive->unix_device = device;
set_drive_letter( drive, i );
}
else
{
RtlFreeHeap( GetProcessHeap(), 0, link );
RtlFreeHeap( GetProcessHeap(), 0, device );
}
}
RegCloseKey( drives_key );
RtlFreeHeap( GetProcessHeap(), 0, path );
}
/* create a new dos drive */
NTSTATUS add_dos_device( int letter, const char *udi, const char *device,
const char *mount_point, enum device_type type )
{
struct dos_drive *drive, *next;
if (letter == -1) /* auto-assign a letter */
{
letter = add_drive( device, type );
if (letter == -1) return STATUS_OBJECT_NAME_COLLISION;
}
else /* simply reset the device symlink */
{
char *path, *p;
if (!(path = get_dosdevices_path( &p ))) return STATUS_NO_MEMORY;
*p = 'a' + letter;
unlink( path );
if (device) symlink( device, path );
}
LIST_FOR_EACH_ENTRY_SAFE( drive, next, &drives_list, struct dos_drive, entry )
{
if (udi && drive->udi && !strcmp( udi, drive->udi ))
{
if (type == drive->type) goto found;
delete_disk_device( drive );
continue;
}
if (drive->drive == letter) delete_disk_device( drive );
}
if (create_disk_device( udi, type, &drive )) return STATUS_NO_MEMORY;
found:
RtlFreeHeap( GetProcessHeap(), 0, drive->unix_device );
drive->unix_device = strdupA( device );
set_drive_letter( drive, letter );
set_unix_mount_point( drive, mount_point );
if (drive->drive != -1)
{
HKEY hkey;
TRACE( "added device %c: udi %s for %s on %s type %u\n",
'a' + drive->drive, wine_dbgstr_a(udi), wine_dbgstr_a(device),
wine_dbgstr_a(mount_point), type );
/* hack: force the drive type in the registry */
if (!RegCreateKeyW( HKEY_LOCAL_MACHINE, drives_keyW, &hkey ))
{
const WCHAR *type_name = drive_types[type];
WCHAR name[3] = {'a',':',0};
name[0] += drive->drive;
if (!type_name[0] && type == DEVICE_HARDDISK) type_name = drive_types[DEVICE_FLOPPY];
if (type_name[0])
RegSetValueExW( hkey, name, 0, REG_SZ, (const BYTE *)type_name,
(strlenW(type_name) + 1) * sizeof(WCHAR) );
else
RegDeleteValueW( hkey, name );
RegCloseKey( hkey );
}
if (udi) send_notify( drive->drive, DBT_DEVICEARRIVAL );
}
return STATUS_SUCCESS;
}
/* remove an existing dos drive, by letter or udi */
NTSTATUS remove_dos_device( int letter, const char *udi )
{
HKEY hkey;
struct dos_drive *drive;
LIST_FOR_EACH_ENTRY( drive, &drives_list, struct dos_drive, entry )
{
if (letter != -1 && drive->drive != letter) continue;
if (udi)
{
if (!drive->udi) continue;
if (strcmp( udi, drive->udi )) continue;
}
if (drive->drive != -1)
{
BOOL modified = set_unix_mount_point( drive, NULL );
/* clear the registry key too */
if (!RegOpenKeyW( HKEY_LOCAL_MACHINE, drives_keyW, &hkey ))
{
WCHAR name[3] = {'a',':',0};
name[0] += drive->drive;
RegDeleteValueW( hkey, name );
RegCloseKey( hkey );
}
if (modified && udi) send_notify( drive->drive, DBT_DEVICEREMOVECOMPLETE );
}
delete_disk_device( drive );
return STATUS_SUCCESS;
}
return STATUS_NO_SUCH_DEVICE;
}
/* query information about an existing dos drive, by letter or udi */
NTSTATUS query_dos_device( int letter, enum device_type *type,
const char **device, const char **mount_point )
{
struct dos_drive *drive;
LIST_FOR_EACH_ENTRY( drive, &drives_list, struct dos_drive, entry )
{
if (drive->drive != letter) continue;
if (type) *type = drive->type;
if (device) *device = drive->unix_device;
if (mount_point) *mount_point = drive->unix_mount;
return STATUS_SUCCESS;
}
return STATUS_NO_SUCH_DEVICE;
}
/* 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;
struct dos_drive *drive = device->DeviceExtension;
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_DISK_GET_DRIVE_GEOMETRY:
{
DISK_GEOMETRY info;
DWORD len = min( sizeof(info), irpsp->Parameters.DeviceIoControl.OutputBufferLength );
info.Cylinders.QuadPart = 10000;
info.MediaType = (drive->devnum.DeviceType == FILE_DEVICE_DISK) ? FixedMedia : RemovableMedia;
info.TracksPerCylinder = 255;
info.SectorsPerTrack = 63;
info.BytesPerSector = 512;
memcpy( irp->MdlAddress->StartVa, &info, len );
irp->IoStatus.Information = len;
irp->IoStatus.u.Status = STATUS_SUCCESS;
break;
}
case IOCTL_STORAGE_GET_DEVICE_NUMBER:
{
DWORD len = min( sizeof(drive->devnum), irpsp->Parameters.DeviceIoControl.OutputBufferLength );
memcpy( irp->MdlAddress->StartVa, &drive->devnum, len );
irp->IoStatus.Information = len;
irp->IoStatus.u.Status = STATUS_SUCCESS;
break;
}
case IOCTL_CDROM_READ_TOC:
irp->IoStatus.u.Status = STATUS_INVALID_DEVICE_REQUEST;
break;
default:
FIXME( "unsupported ioctl %x\n", irpsp->Parameters.DeviceIoControl.IoControlCode );
irp->IoStatus.u.Status = STATUS_NOT_SUPPORTED;
break;
}
return irp->IoStatus.u.Status;
}
/* driver entry point for the harddisk driver */
NTSTATUS WINAPI harddisk_driver_entry( DRIVER_OBJECT *driver, UNICODE_STRING *path )
{
struct dos_drive *drive;
harddisk_driver = driver;
driver->MajorFunction[IRP_MJ_DEVICE_CONTROL] = harddisk_ioctl;
/* create a harddisk0 device that isn't assigned to any drive */
create_disk_device( "harddisk0 placeholder", DEVICE_HARDDISK, &drive );
create_drive_devices();
return STATUS_SUCCESS;
}
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