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This device is a block device that allows a user to effectively treat an Inode as a block device. The static construction method is given an OpenFileDescription reference but validates that: - The description has a valid custody (so it's not some arbitrary file). Failing this requirement will yield EINVAL. - The description custody points to an Inode which is a regular file, as we only support (seekable) regular files. Failing this requirement will yield ENOTSUP. LoopDevice can be used to mount a regular file on the filesystem like other supported types of (physical) block devices.
104 lines
2 KiB
C++
104 lines
2 KiB
C++
/*
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* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/DistinctNumeric.h>
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#include <Kernel/API/POSIX/sys/types.h>
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namespace Kernel {
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enum class LockRank;
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class BlockDevice;
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class CharacterDevice;
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class Coredump;
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class Credentials;
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class Custody;
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class Device;
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class DeviceControlDevice;
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class DiskCache;
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class DoubleBuffer;
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class File;
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class FATInode;
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class OpenFileDescription;
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class DisplayConnector;
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class FileSystem;
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class FutexQueue;
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class IPv4Socket;
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class Inode;
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class InodeIdentifier;
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class InodeWatcher;
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class MountFile;
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class Jail;
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class KBuffer;
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class KString;
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class LocalSocket;
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class LoopDevice;
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class Mutex;
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class MasterPTY;
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class Mount;
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class PerformanceEventBuffer;
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class ProcFS;
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class ProcFSInode;
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class Process;
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class ProcessGroup;
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class RAMFS;
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template<LockRank Rank>
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class RecursiveSpinlock;
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class Scheduler;
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class Socket;
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class SysFS;
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class SysFSDirectory;
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class SysFSRootDirectory;
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class SysFSBusDirectory;
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class SysFSDevicesDirectory;
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class SysFSDirectoryInode;
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class SysFSInode;
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class TCPSocket;
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class TTY;
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class Thread;
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class ThreadTracer;
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class RAMFSInode;
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class UDPSocket;
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class UserOrKernelBuffer;
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class VirtualFileSystem;
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class WaitQueue;
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class WorkQueue;
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namespace Memory {
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class AddressSpace;
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class AnonymousVMObject;
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class InodeVMObject;
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class MappedROM;
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class MemoryManager;
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class PageDirectory;
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class PhysicalPage;
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class PhysicalRegion;
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class PrivateInodeVMObject;
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class Region;
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class SharedInodeVMObject;
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class VMObject;
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class VirtualRange;
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}
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template<LockRank Rank>
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class Spinlock;
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template<typename LockType>
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class SpinlockLocker;
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struct InodeMetadata;
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struct TrapFrame;
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AK_TYPEDEF_DISTINCT_ORDERED_ID(pid_t, ProcessID);
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AK_TYPEDEF_DISTINCT_ORDERED_ID(pid_t, ThreadID);
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AK_TYPEDEF_DISTINCT_ORDERED_ID(pid_t, SessionID);
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AK_TYPEDEF_DISTINCT_ORDERED_ID(pid_t, ProcessGroupID);
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AK_TYPEDEF_DISTINCT_ORDERED_ID(uid_t, UserID);
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AK_TYPEDEF_DISTINCT_ORDERED_ID(gid_t, GroupID);
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}
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