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mountmgr.sys: Create disk devices for all configured drives.

This commit is contained in:
Alexandre Julliard 2008-01-04 14:24:59 +01:00
parent 07e92a7dad
commit 2143dee78a
1 changed files with 199 additions and 0 deletions
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199
dlls/mountmgr.sys/mountmgr.c
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@ -38,6 +38,178 @@
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 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) );
return STATUS_SUCCESS;
}
/* handler for ioctls on the mount manager device */
static NTSTATUS WINAPI mountmgr_ioctl( DEVICE_OBJECT *device, IRP *irp )
{
@ -78,6 +250,31 @@ static NTSTATUS WINAPI harddisk_ioctl( DEVICE_OBJECT *device, IRP *irp )
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 )
{
@ -101,6 +298,8 @@ static NTSTATUS WINAPI harddisk_driver_entry( DRIVER_OBJECT *driver, UNICODE_STR
return status;
}
create_drive_mount_points( driver );
return status;
}