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mountmgr.sys: Simplify query_unix_drive. 

Signed-off-by: Erich E. Hoover <erich.e.hoover@gmail.com>
Signed-off-by: Zebediah Figura <z.figura12@gmail.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Erich E. Hoover 2021-02-28 14:59:14 -07:00 committed by Alexandre Julliard
parent 5a6c82e9e3
commit 3fcfbbf55a
1 changed files with 32 additions and 48 deletions
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80
dlls/mountmgr.sys/device.c
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@ -1696,62 +1696,38 @@ static enum mountmgr_fs_type get_mountmgr_fs_type(enum fs_type fs_type)
}
/* query information about an existing dos drive, by letter or udi */
static NTSTATUS query_dos_device( int letter, enum device_type *type, enum mountmgr_fs_type *fs_type,
DWORD *serial, char **device, char **mount_point, WCHAR **label )
static struct volume *find_volume_by_letter( int letter )
{
NTSTATUS status = STATUS_NO_SUCH_DEVICE;
struct volume *volume = NULL;
struct dos_drive *drive;
struct disk_device *disk_device;
EnterCriticalSection( &device_section );
LIST_FOR_EACH_ENTRY( drive, &drives_list, struct dos_drive, entry )
{
if (drive->drive != letter) continue;
disk_device = drive->volume->device;
if (type) *type = disk_device->type;
if (fs_type) *fs_type = get_mountmgr_fs_type( drive->volume->fs_type );
if (serial) *serial = drive->volume->serial;
if (device) *device = strdupA( disk_device->unix_device );
if (mount_point) *mount_point = strdupA( disk_device->unix_mount );
if (label) *label = strdupW( drive->volume->label );
status = STATUS_SUCCESS;
volume = grab_volume( drive->volume );
TRACE( "found matching volume %s for drive letter %c:\n", debugstr_guid(&volume->guid),
'a' + letter );
break;
}
LeaveCriticalSection( &device_section );
return status;
return volume;
}
/* query information about an existing unix device, by dev_t */
static NTSTATUS query_unix_device( ULONGLONG unix_dev, enum device_type *type,
enum mountmgr_fs_type *fs_type, DWORD *serial, char **device,
char **mount_point, WCHAR **label )
static struct volume *find_volume_by_unixdev( ULONGLONG unix_dev )
{
NTSTATUS status = STATUS_NO_SUCH_DEVICE;
struct volume *volume;
struct disk_device *disk_device;
struct stat st;
EnterCriticalSection( &device_section );
LIST_FOR_EACH_ENTRY( volume, &volumes_list, struct volume, entry )
{
disk_device = volume->device;
if (!disk_device->unix_device
|| stat( disk_device->unix_device, &st ) < 0
if (!volume->device->unix_device || stat( volume->device->unix_device, &st ) < 0
|| st.st_rdev != unix_dev)
continue;
if (type) *type = disk_device->type;
if (fs_type) *fs_type = get_mountmgr_fs_type( volume->fs_type );
if (serial) *serial = volume->serial;
if (device) *device = strdupA( disk_device->unix_device );
if (mount_point) *mount_point = strdupA( disk_device->unix_mount );
if (label) *label = strdupW( volume->label );
status = STATUS_SUCCESS;
break;
TRACE( "found matching volume %s\n", debugstr_guid(&volume->guid) );
return grab_volume( volume );
}
LeaveCriticalSection( &device_section );
return status;
return NULL;
}
/* implementation of IOCTL_MOUNTMGR_QUERY_UNIX_DRIVE */
@ -1761,27 +1737,35 @@ NTSTATUS query_unix_drive( void *buff, SIZE_T insize, SIZE_T outsize, IO_STATUS_
struct mountmgr_unix_drive *output = NULL;
char *device, *mount_point;
int letter = tolowerW( input->letter );
NTSTATUS status;
DWORD size, type = DEVICE_UNKNOWN, serial;
NTSTATUS status = STATUS_SUCCESS;
enum mountmgr_fs_type fs_type;
enum device_type device_type;
struct volume *volume;
char *ptr;
WCHAR *label;
if (!letter)
{
if ((status = query_unix_device( input->unix_dev, &device_type, &fs_type,
&serial, &device, &mount_point, &label )))
return status;
}
else
{
if (letter < 'a' || letter > 'z') return STATUS_INVALID_PARAMETER;
if (letter && (letter < 'a' || letter > 'z')) return STATUS_INVALID_PARAMETER;
if ((status = query_dos_device( letter - 'a', &device_type, &fs_type, &serial, &device,
&mount_point, &label )))
return status;
EnterCriticalSection( &device_section );
if (letter)
volume = find_volume_by_letter( letter - 'a' );
else
volume = find_volume_by_unixdev( input->unix_dev );
if (volume)
{
device_type = volume->device->type;
fs_type = get_mountmgr_fs_type( volume->fs_type );
serial = volume->serial;
device = strdupA( volume->device->unix_device );
mount_point = strdupA( volume->device->unix_mount );
label = strdupW( volume->label );
release_volume( volume );
}
LeaveCriticalSection( &device_section );
if (!volume)
return STATUS_NO_SUCH_DEVICE;
switch (device_type)
{