mirror of
https://github.com/RGBCube/serenity
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c88cc8557f
We make these methods non-virtual because we want to ensure we properly enforce locking of the m_inode_lock mutex. Also, for write operations, we want to call prepare_to_write_data before the actual write. The previous design required us to ensure the callers do that at various places which lead to hard-to-find bugs. By moving everything to a place where we call prepare_to_write_data only once, we eliminate a possibilty of forgeting to call it on some code path in the kernel.
66 lines
2.1 KiB
C++
66 lines
2.1 KiB
C++
/*
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* Copyright (c) 2019-2020, Sergey Bugaev <bugaevc@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/Types.h>
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#include <Kernel/FileSystem/FileSystem.h>
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#include <Kernel/FileSystem/Inode.h>
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namespace Kernel {
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class SlavePTY;
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class DevPtsFSInode;
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class DevPtsFS final : public FileSystem {
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friend class DevPtsFSInode;
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public:
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virtual ~DevPtsFS() override;
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static ErrorOr<NonnullLockRefPtr<FileSystem>> try_create();
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virtual ErrorOr<void> initialize() override;
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virtual StringView class_name() const override { return "DevPtsFS"sv; }
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virtual Inode& root_inode() override;
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private:
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DevPtsFS();
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ErrorOr<NonnullLockRefPtr<Inode>> get_inode(InodeIdentifier) const;
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LockRefPtr<DevPtsFSInode> m_root_inode;
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};
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class DevPtsFSInode final : public Inode {
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friend class DevPtsFS;
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public:
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virtual ~DevPtsFSInode() override;
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DevPtsFS& fs() { return static_cast<DevPtsFS&>(Inode::fs()); }
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DevPtsFS const& fs() const { return static_cast<DevPtsFS const&>(Inode::fs()); }
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private:
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DevPtsFSInode(DevPtsFS&, InodeIndex, SlavePTY*);
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// ^Inode
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virtual ErrorOr<size_t> read_bytes_locked(off_t, size_t, UserOrKernelBuffer& buffer, OpenFileDescription*) const override;
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virtual InodeMetadata metadata() const override;
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virtual ErrorOr<void> traverse_as_directory(Function<ErrorOr<void>(FileSystem::DirectoryEntryView const&)>) const override;
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virtual ErrorOr<NonnullLockRefPtr<Inode>> lookup(StringView name) override;
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virtual ErrorOr<void> flush_metadata() override;
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virtual ErrorOr<size_t> write_bytes_locked(off_t, size_t, UserOrKernelBuffer const& buffer, OpenFileDescription*) override;
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virtual ErrorOr<NonnullLockRefPtr<Inode>> create_child(StringView name, mode_t, dev_t, UserID, GroupID) override;
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virtual ErrorOr<void> add_child(Inode&, StringView name, mode_t) override;
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virtual ErrorOr<void> remove_child(StringView name) override;
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virtual ErrorOr<void> chmod(mode_t) override;
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virtual ErrorOr<void> chown(UserID, GroupID) override;
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LockWeakPtr<SlavePTY> m_pty;
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InodeMetadata m_metadata;
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};
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}
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