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/*
* Copyright (C) 2019 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.
*/
package android.gsi;
import android.gsi.MappedImage;
/** {@hide} */
interface IImageService {
/* These flags match fiemap::ImageManager::CreateBackingImage. */
const int CREATE_IMAGE_DEFAULT = 0x0;
const int CREATE_IMAGE_READONLY = 0x1;
const int CREATE_IMAGE_ZERO_FILL = 0x2;
/**
* Create an image that can be mapped as a block device.
*
* This call will fail if running a GSI.
*
* @param name Image name. If the image already exists, the call will fail.
* @param size Image size, in bytes. If too large, or not enough space is
* free, the call will fail.
* @param readonly If readonly, MapBackingImage() will configure the device as
* readonly.
* @return True on success, false otherwise.
*/
void createBackingImage(@utf8InCpp String name, long size, int flags);
/**
* Delete an image created with createBackingImage.
*
* @param name Image name as passed to createBackingImage().
* @return True on success, false otherwise.
*/
void deleteBackingImage(@utf8InCpp String name);
/**
* Map an image, created with createBackingImage, such that it is accessible as a
* block device.
*
* @param name Image name as passed to createBackingImage().
* @param timeout_ms Time to wait for a valid mapping, in milliseconds. This must be more
* than zero; 10 seconds is recommended.
* @param mapping Information about the newly mapped block device.
*/
void mapImageDevice(@utf8InCpp String name, int timeout_ms, out MappedImage mapping);
/**
* Unmap a block device previously mapped with mapBackingImage. This step is necessary before
* calling deleteBackingImage.
*
* @param name Image name as passed to createBackingImage().
*/
void unmapImageDevice(@utf8InCpp String name);
/**
* Returns whether or not a backing image exists.
*
* @param name Image name as passed to createBackingImage().
*/
boolean backingImageExists(@utf8InCpp String name);
/**
* Returns whether or not the named image is mapped.
*
* @param name Image name as passed to createBackingImage().
*/
boolean isImageMapped(@utf8InCpp String name);
/**
* Get all installed backing image names
*
* @return list of installed backing image names
*/
@utf8InCpp List<String> getAllBackingImages();
/**
* Writes a given amount of zeros in image file.
*
* @param name Image name. If the image does not exist, the call
* will fail.
* @param bytes Number of zeros to be written, starting from the
* beginning. If bytes is equal to 0, then the whole
* image file is filled with zeros.
* @return True on success, false otherwise.
*/
void zeroFillNewImage(@utf8InCpp String name, long bytes);
}
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