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ProcFS: Implement symlink magic

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Sergey Bugaev 2020-01-15 14:05:02 +03:00 • committed by Andreas Kling
parent 8642a7046c
commit 68aeefa49b
2 changed files with 148 additions and 0 deletions
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35
Kernel/FileSystem/ProcFS.h
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@ -81,8 +81,43 @@ private:
virtual size_t directory_entry_count() const override;
virtual KResult chmod(mode_t) override;
virtual KResult chown(uid_t, gid_t) override;
virtual KResultOr<NonnullRefPtr<Custody>> resolve_as_link(Custody& base, RefPtr<Custody>* out_parent = nullptr, int options = 0, int symlink_recursion_level = 0) const override;
ProcFS& fs() { return static_cast<ProcFS&>(Inode::fs()); }
const ProcFS& fs() const { return static_cast<const ProcFS&>(Inode::fs()); }
ProcFSInode(ProcFS&, unsigned index);
};
class ProcFSProxyInode final : public Inode {
friend class ProcFSInode;
public:
virtual ~ProcFSProxyInode() override;
private:
// ^Inode
virtual ssize_t read_bytes(off_t, ssize_t, u8*, FileDescription*) const override { ASSERT_NOT_REACHED(); }
virtual InodeMetadata metadata() const override;
virtual bool traverse_as_directory(Function<bool(const FS::DirectoryEntry&)>) const override { ASSERT_NOT_REACHED(); }
virtual InodeIdentifier lookup(StringView name) override;
virtual void flush_metadata() override {};
virtual ssize_t write_bytes(off_t, ssize_t, const u8*, FileDescription*) override { ASSERT_NOT_REACHED(); }
virtual KResult add_child(InodeIdentifier child_id, const StringView& name, mode_t) override;
virtual KResult remove_child(const StringView& name) override;
virtual size_t directory_entry_count() const override;
virtual KResult chmod(mode_t) override { return KResult(-EINVAL); }
virtual KResult chown(uid_t, gid_t) override { return KResult(-EINVAL); }
virtual KResultOr<NonnullRefPtr<Custody>> resolve_as_link(Custody&, RefPtr<Custody>*, int, int) const override { ASSERT_NOT_REACHED(); }
virtual FileDescription* preopen_fd() override { return m_fd; }
ProcFS& fs() { return static_cast<ProcFS&>(Inode::fs()); }
const ProcFS& fs() const { return static_cast<const ProcFS&>(Inode::fs()); }
ProcFSProxyInode(ProcFS&, FileDescription&);
static NonnullRefPtr<ProcFSProxyInode> create(ProcFS& fs, FileDescription& fd)
{
return adopt(*new ProcFSProxyInode(fs, fd));
}
NonnullRefPtr<FileDescription> m_fd;
};