56 lines
2.1 KiB
C++
56 lines
2.1 KiB
C++
/*
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* Copyright (C) 2019 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#pragma once
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#include <stdint.h>
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#include <string>
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#include <libfiemap/split_fiemap_writer.h>
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namespace android {
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namespace fiemap {
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// Given a file that will be created, determine the maximum size its containing
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// filesystem allows. Note this is a theoretical maximum size; free space is
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// ignored entirely.
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FiemapStatus DetermineMaximumFileSize(const std::string& file_path, uint64_t* result);
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// Given a SplitFiemap, this returns a device path that will work during first-
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// stage init (i.e., its path can be found by InitRequiredDevices).
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std::string GetDevicePathForFile(android::fiemap::SplitFiemap* file);
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// Combine two path components into a single path.
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std::string JoinPaths(const std::string& dir, const std::string& file);
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// Given a file within an F2FS filesystem, return whether or not the filesystem
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// supports the "pin_file" feature, which requires pinning before fallocation.
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bool F2fsPinBeforeAllocate(int file_fd, bool* supported);
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// Given a major/minor device number, return its canonical name such that
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// /dev/block/<name> resolves to the device.
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bool BlockDeviceToName(uint32_t major, uint32_t minor, std::string* bdev_name);
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// This is the same as F2fsPinBeforeAllocate, however, it will return true
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// (and supported = true) for non-f2fs filesystems. It is intended to be used
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// in conjunction with ImageManager to reject image requests for reliable use
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// cases (such as snapshots or adb remount).
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bool FilesystemHasReliablePinning(const std::string& file, bool* supported);
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} // namespace fiemap
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} // namespace android
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