platform_system_vold/Devmapper.h
David Anderson b92247368a Replace manual dm ioctls with libdm.
This mostly 1:1 replaces manual ioctls to device-mapper with calls to
libdm. There were two exceptions:

(1) There is a very old table-load-retry loop to workaround issues with
    umount (b/7220345). This loop has been preserved, however, it now
    includes DM_DEV_CREATE as well as DM_TABLE_LOAD.
(2) There was some ancient code to set DM_DEV_GEOMETRY for obb
    dm-devices. This never did anything since geometry must be set after
    loading a table. When setting it before (as vold was doing), the
    subsequent DM_TABLE_LOAD will clear it.

Bug: 132206403
Test: FBE device boots
      FBE device w/ metadata encryption boots
      FDE device boots
      atest StorageManagerIntegrationTest
Change-Id: Ib6db6b47329f093ac7084edaf604eddace8b9ac6
2019-05-13 13:07:12 -07:00

31 lines
977 B
C++

/*
* Copyright (C) 2008 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef _DEVMAPPER_H
#define _DEVMAPPER_H
#include <linux/dm-ioctl.h>
#include <unistd.h>
class Devmapper {
public:
static int create(const char* name, const char* loopFile, const char* key,
unsigned long numSectors, char* buffer, size_t len);
static int destroy(const char* name);
static int destroyAll();
};
#endif