Kernel: Use non-locking {Nonnull,}RefPtr for OpenFileDescription

This patch switches away from {Nonnull,}LockRefPtr to the non-locking
smart pointers throughout the kernel.

I've looked at the handful of places where these were being persisted
and I don't see any race situations.

Note that the process file descriptor table (Process::m_fds) was already
guarded via MutexProtected.

Kernel/Bus/VirtIO/ConsolePort.cpp

@@ -161,7 +161,7 @@ ErrorOr<size_t> ConsolePort::write(OpenFileDescription& desc, u64, UserOrKernelB
     return total_bytes_copied;
 }
 
-ErrorOr<NonnullLockRefPtr<OpenFileDescription>> ConsolePort::open(int options)
+ErrorOr<NonnullRefPtr<OpenFileDescription>> ConsolePort::open(int options)
 {
     if (!m_open)
         m_console.send_open_control_message(m_port, true);

Kernel/Bus/VirtIO/ConsolePort.h

@@ -44,7 +44,7 @@ private:
     virtual ErrorOr<size_t> read(OpenFileDescription&, u64, UserOrKernelBuffer&, size_t) override;
     virtual bool can_write(OpenFileDescription const&, u64) const override;
     virtual ErrorOr<size_t> write(OpenFileDescription&, u64, UserOrKernelBuffer const&, size_t) override;
-    virtual ErrorOr<NonnullLockRefPtr<OpenFileDescription>> open(int options) override;
+    virtual ErrorOr<NonnullRefPtr<OpenFileDescription>> open(int options) override;
 
     static unsigned next_device_id;
     u16 m_receive_queue {};

Kernel/Coredump.cpp

@@ -74,7 +74,7 @@ ErrorOr<NonnullOwnPtr<Coredump>> Coredump::try_create(NonnullLockRefPtr<Process>
     return adopt_nonnull_own_or_enomem(new (nothrow) Coredump(move(process), move(description), move(regions)));
 }
 
-Coredump::Coredump(NonnullLockRefPtr<Process> process, NonnullLockRefPtr<OpenFileDescription> description, Vector<FlatRegionData> regions)
+Coredump::Coredump(NonnullLockRefPtr<Process> process, NonnullRefPtr<OpenFileDescription> description, Vector<FlatRegionData> regions)
     : m_process(move(process))
     , m_description(move(description))
     , m_regions(move(regions))
@@ -93,7 +93,7 @@ Coredump::Coredump(NonnullLockRefPtr<Process> process, NonnullLockRefPtr<OpenFil
     ++m_num_program_headers; // +1 for NOTE segment
 }
 
-ErrorOr<NonnullLockRefPtr<OpenFileDescription>> Coredump::try_create_target_file(Process const& process, StringView output_path)
+ErrorOr<NonnullRefPtr<OpenFileDescription>> Coredump::try_create_target_file(Process const& process, StringView output_path)
 {
     auto output_directory = KLexicalPath::dirname(output_path);
     auto dump_directory = TRY(VirtualFileSystem::the().open_directory(Process::current().credentials(), output_directory, VirtualFileSystem::the().root_custody()));

Kernel/Coredump.h

@@ -65,8 +65,8 @@ private:
         VirtualAddress m_vaddr;
     };
 
-    Coredump(NonnullLockRefPtr<Process>, NonnullLockRefPtr<OpenFileDescription>, Vector<FlatRegionData>);
-    static ErrorOr<NonnullLockRefPtr<OpenFileDescription>> try_create_target_file(Process const&, StringView output_path);
+    Coredump(NonnullLockRefPtr<Process>, NonnullRefPtr<OpenFileDescription>, Vector<FlatRegionData>);
+    static ErrorOr<NonnullRefPtr<OpenFileDescription>> try_create_target_file(Process const&, StringView output_path);
 
     ErrorOr<void> write_elf_header();
     ErrorOr<void> write_program_headers(size_t notes_size);
@@ -80,7 +80,7 @@ private:
     ErrorOr<void> create_notes_metadata_data(auto&) const;
 
     NonnullLockRefPtr<Process> m_process;
-    NonnullLockRefPtr<OpenFileDescription> m_description;
+    NonnullRefPtr<OpenFileDescription> m_description;
     size_t m_num_program_headers { 0 };
     Vector<FlatRegionData> m_regions;
 };

Kernel/Devices/Device.cpp

@@ -59,7 +59,7 @@ ErrorOr<NonnullOwnPtr<KString>> Device::pseudo_path(OpenFileDescription const&)
     return KString::formatted("device:{},{}", major(), minor());
 }
 
-ErrorOr<NonnullLockRefPtr<OpenFileDescription>> Device::open(int options)
+ErrorOr<NonnullRefPtr<OpenFileDescription>> Device::open(int options)
 {
     TRY(Process::current().jail().with([&](auto const& my_jail) -> ErrorOr<void> {
         if (my_jail && !is_openable_by_jailed_processes())

Kernel/Devices/Device.h

@@ -43,7 +43,7 @@ public:
     MinorNumber minor() const { return m_minor; }
 
     virtual ErrorOr<NonnullOwnPtr<KString>> pseudo_path(OpenFileDescription const&) const override;
-    virtual ErrorOr<NonnullLockRefPtr<OpenFileDescription>> open(int options) override;
+    virtual ErrorOr<NonnullRefPtr<OpenFileDescription>> open(int options) override;
 
     UserID uid() const { return m_uid; }
     GroupID gid() const { return m_gid; }

Kernel/Devices/KCOVDevice.cpp

@@ -65,7 +65,7 @@ void KCOVDevice::free_process()
     delete kcov_instance;
 }
 
-ErrorOr<NonnullLockRefPtr<OpenFileDescription>> KCOVDevice::open(int options)
+ErrorOr<NonnullRefPtr<OpenFileDescription>> KCOVDevice::open(int options)
 {
     auto pid = Process::current().pid();
     if (proc_instance->get(pid).has_value())

Kernel/Devices/KCOVDevice.h

@@ -23,7 +23,7 @@ public:
 
     // ^File
     ErrorOr<NonnullLockRefPtr<Memory::VMObject>> vmobject_for_mmap(Process&, Memory::VirtualRange const&, u64& offset, bool shared) override;
-    ErrorOr<NonnullLockRefPtr<OpenFileDescription>> open(int options) override;
+    virtual ErrorOr<NonnullRefPtr<OpenFileDescription>> open(int options) override;
 
 protected:
     KCOVDevice();

Kernel/Devices/SelfTTYDevice.cpp

@@ -19,7 +19,7 @@ UNMAP_AFTER_INIT NonnullLockRefPtr<SelfTTYDevice> SelfTTYDevice::must_create()
     return self_tty_device_or_error.release_value();
 }
 
-ErrorOr<NonnullLockRefPtr<OpenFileDescription>> SelfTTYDevice::open(int options)
+ErrorOr<NonnullRefPtr<OpenFileDescription>> SelfTTYDevice::open(int options)
 {
     // Note: If for some odd reason we try to open this device (early on boot?)
     // while there's no current Process assigned, don't fail and return an error.

Kernel/Devices/SelfTTYDevice.h

@@ -24,7 +24,7 @@ private:
     virtual bool is_openable_by_jailed_processes() const override { return true; }
 
     // ^CharacterDevice
-    virtual ErrorOr<NonnullLockRefPtr<OpenFileDescription>> open(int options) override;
+    virtual ErrorOr<NonnullRefPtr<OpenFileDescription>> open(int options) override;
     virtual ErrorOr<size_t> read(OpenFileDescription&, u64, UserOrKernelBuffer&, size_t) override;
     virtual ErrorOr<size_t> write(OpenFileDescription&, u64, UserOrKernelBuffer const&, size_t) override;
     virtual bool can_read(OpenFileDescription const&, u64) const override;

Kernel/FileSystem/FIFO.cpp

@@ -22,7 +22,7 @@ ErrorOr<NonnullLockRefPtr<FIFO>> FIFO::try_create(UserID uid)
     return adopt_nonnull_lock_ref_or_enomem(new (nothrow) FIFO(uid, move(buffer)));
 }
 
-ErrorOr<NonnullLockRefPtr<OpenFileDescription>> FIFO::open_direction(FIFO::Direction direction)
+ErrorOr<NonnullRefPtr<OpenFileDescription>> FIFO::open_direction(FIFO::Direction direction)
 {
     auto description = TRY(OpenFileDescription::try_create(*this));
     attach(direction);
@@ -30,7 +30,7 @@ ErrorOr<NonnullLockRefPtr<OpenFileDescription>> FIFO::open_direction(FIFO::Direc
     return description;
 }
 
-ErrorOr<NonnullLockRefPtr<OpenFileDescription>> FIFO::open_direction_blocking(FIFO::Direction direction)
+ErrorOr<NonnullRefPtr<OpenFileDescription>> FIFO::open_direction_blocking(FIFO::Direction direction)
 {
     MutexLocker locker(m_open_lock);
 

Kernel/FileSystem/FIFO.h

@@ -29,8 +29,8 @@ public:
 
     UserID uid() const { return m_uid; }
 
-    ErrorOr<NonnullLockRefPtr<OpenFileDescription>> open_direction(Direction);
-    ErrorOr<NonnullLockRefPtr<OpenFileDescription>> open_direction_blocking(Direction);
+    ErrorOr<NonnullRefPtr<OpenFileDescription>> open_direction(Direction);
+    ErrorOr<NonnullRefPtr<OpenFileDescription>> open_direction_blocking(Direction);
 
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Woverloaded-virtual"

Kernel/FileSystem/File.cpp

@@ -15,7 +15,7 @@ namespace Kernel {
 File::File() = default;
 File::~File() = default;
 
-ErrorOr<NonnullLockRefPtr<OpenFileDescription>> File::open(int options)
+ErrorOr<NonnullRefPtr<OpenFileDescription>> File::open(int options)
 {
     auto description = OpenFileDescription::try_create(*this);
     if (!description.is_error()) {

Kernel/FileSystem/File.h

@@ -78,7 +78,7 @@ public:
     virtual void will_be_destroyed() { }
     virtual ~File();
 
-    virtual ErrorOr<NonnullLockRefPtr<OpenFileDescription>> open(int options);
+    virtual ErrorOr<NonnullRefPtr<OpenFileDescription>> open(int options);
     virtual ErrorOr<void> close();
 
     virtual bool can_read(OpenFileDescription const&, u64) const = 0;

Kernel/FileSystem/FileBackedFileSystem.h

@@ -38,6 +38,6 @@ private:
     virtual bool is_file_backed() const override { return true; }
 
     IntrusiveListNode<FileBackedFileSystem> m_file_backed_file_system_node;
-    mutable NonnullLockRefPtr<OpenFileDescription> m_file_description;
+    NonnullRefPtr<OpenFileDescription> m_file_description;
 };
 }

Kernel/FileSystem/OpenFileDescription.cpp

@@ -23,19 +23,19 @@
 
 namespace Kernel {
 
-ErrorOr<NonnullLockRefPtr<OpenFileDescription>> OpenFileDescription::try_create(Custody& custody)
+ErrorOr<NonnullRefPtr<OpenFileDescription>> OpenFileDescription::try_create(Custody& custody)
 {
     auto inode_file = TRY(InodeFile::create(custody.inode()));
-    auto description = TRY(adopt_nonnull_lock_ref_or_enomem(new (nothrow) OpenFileDescription(move(inode_file))));
+    auto description = TRY(adopt_nonnull_ref_or_enomem(new (nothrow) OpenFileDescription(move(inode_file))));
 
     description->m_state.with([&](auto& state) { state.custody = custody; });
     TRY(description->attach());
     return description;
 }
 
-ErrorOr<NonnullLockRefPtr<OpenFileDescription>> OpenFileDescription::try_create(File& file)
+ErrorOr<NonnullRefPtr<OpenFileDescription>> OpenFileDescription::try_create(File& file)
 {
-    auto description = TRY(adopt_nonnull_lock_ref_or_enomem(new (nothrow) OpenFileDescription(file)));
+    auto description = TRY(adopt_nonnull_ref_or_enomem(new (nothrow) OpenFileDescription(file)));
     TRY(description->attach());
     return description;
 }

Kernel/FileSystem/OpenFileDescription.h

@@ -26,8 +26,8 @@ public:
 
 class OpenFileDescription final : public AtomicRefCounted<OpenFileDescription> {
 public:
-    static ErrorOr<NonnullLockRefPtr<OpenFileDescription>> try_create(Custody&);
-    static ErrorOr<NonnullLockRefPtr<OpenFileDescription>> try_create(File&);
+    static ErrorOr<NonnullRefPtr<OpenFileDescription>> try_create(Custody&);
+    static ErrorOr<NonnullRefPtr<OpenFileDescription>> try_create(File&);
     ~OpenFileDescription();
 
     Thread::FileBlocker::BlockFlags should_unblock(Thread::FileBlocker::BlockFlags) const;

Kernel/FileSystem/ProcFS/ProcessExposed.cpp

@@ -262,7 +262,7 @@ ErrorOr<void> Process::procfs_get_fds_stats(KBufferBuilder& builder) const
                 return {};
             }
             bool cloexec = file_description_metadata.flags() & FD_CLOEXEC;
-            LockRefPtr<OpenFileDescription> description = file_description_metadata.description();
+            auto const* description = file_description_metadata.description();
             auto description_object = TRY(array.add_object());
             TRY(description_object.add("fd"sv, count));
             // TODO: Better OOM handling.
@@ -275,7 +275,7 @@ ErrorOr<void> Process::procfs_get_fds_stats(KBufferBuilder& builder) const
             TRY(description_object.add("blocking"sv, description->is_blocking()));
             TRY(description_object.add("can_read"sv, description->can_read()));
             TRY(description_object.add("can_write"sv, description->can_write()));
-            Inode* inode = description->inode();
+            Inode const* inode = description->inode();
             if (inode != nullptr) {
                 auto inode_object = TRY(description_object.add_object("inode"sv));
                 TRY(inode_object.add("fsid"sv, inode->fsid().value()));

Kernel/FileSystem/VirtualFileSystem.cpp

@@ -356,12 +356,12 @@ ErrorOr<NonnullLockRefPtr<FileBackedFileSystem>> VirtualFileSystem::find_already
     }));
 }
 
-ErrorOr<NonnullLockRefPtr<OpenFileDescription>> VirtualFileSystem::open(Credentials const& credentials, StringView path, int options, mode_t mode, Custody& base, Optional<UidAndGid> owner)
+ErrorOr<NonnullRefPtr<OpenFileDescription>> VirtualFileSystem::open(Credentials const& credentials, StringView path, int options, mode_t mode, Custody& base, Optional<UidAndGid> owner)
 {
     return open(Process::current(), credentials, path, options, mode, base, owner);
 }
 
-ErrorOr<NonnullLockRefPtr<OpenFileDescription>> VirtualFileSystem::open(Process const& process, Credentials const& credentials, StringView path, int options, mode_t mode, Custody& base, Optional<UidAndGid> owner)
+ErrorOr<NonnullRefPtr<OpenFileDescription>> VirtualFileSystem::open(Process const& process, Credentials const& credentials, StringView path, int options, mode_t mode, Custody& base, Optional<UidAndGid> owner)
 {
     if ((options & O_CREAT) && (options & O_DIRECTORY))
         return EINVAL;
@@ -476,12 +476,12 @@ ErrorOr<void> VirtualFileSystem::mknod(Credentials const& credentials, StringVie
     return {};
 }
 
-ErrorOr<NonnullLockRefPtr<OpenFileDescription>> VirtualFileSystem::create(Credentials const& credentials, StringView path, int options, mode_t mode, Custody& parent_custody, Optional<UidAndGid> owner)
+ErrorOr<NonnullRefPtr<OpenFileDescription>> VirtualFileSystem::create(Credentials const& credentials, StringView path, int options, mode_t mode, Custody& parent_custody, Optional<UidAndGid> owner)
 {
     return create(Process::current(), credentials, path, options, mode, parent_custody, owner);
 }
 
-ErrorOr<NonnullLockRefPtr<OpenFileDescription>> VirtualFileSystem::create(Process const& process, Credentials const& credentials, StringView path, int options, mode_t mode, Custody& parent_custody, Optional<UidAndGid> owner)
+ErrorOr<NonnullRefPtr<OpenFileDescription>> VirtualFileSystem::create(Process const& process, Credentials const& credentials, StringView path, int options, mode_t mode, Custody& parent_custody, Optional<UidAndGid> owner)
 {
     auto basename = KLexicalPath::basename(path);
     auto parent_path = TRY(parent_custody.try_serialize_absolute_path());

Kernel/FileSystem/VirtualFileSystem.h

@@ -59,10 +59,10 @@ public:
     ErrorOr<void> remount(Custody& mount_point, int new_flags);
     ErrorOr<void> unmount(Custody& mount_point);
 
-    ErrorOr<NonnullLockRefPtr<OpenFileDescription>> open(Credentials const&, StringView path, int options, mode_t mode, Custody& base, Optional<UidAndGid> = {});
-    ErrorOr<NonnullLockRefPtr<OpenFileDescription>> open(Process const&, Credentials const&, StringView path, int options, mode_t mode, Custody& base, Optional<UidAndGid> = {});
-    ErrorOr<NonnullLockRefPtr<OpenFileDescription>> create(Credentials const&, StringView path, int options, mode_t mode, Custody& parent_custody, Optional<UidAndGid> = {});
-    ErrorOr<NonnullLockRefPtr<OpenFileDescription>> create(Process const&, Credentials const&, StringView path, int options, mode_t mode, Custody& parent_custody, Optional<UidAndGid> = {});
+    ErrorOr<NonnullRefPtr<OpenFileDescription>> open(Credentials const&, StringView path, int options, mode_t mode, Custody& base, Optional<UidAndGid> = {});
+    ErrorOr<NonnullRefPtr<OpenFileDescription>> open(Process const&, Credentials const&, StringView path, int options, mode_t mode, Custody& base, Optional<UidAndGid> = {});
+    ErrorOr<NonnullRefPtr<OpenFileDescription>> create(Credentials const&, StringView path, int options, mode_t mode, Custody& parent_custody, Optional<UidAndGid> = {});
+    ErrorOr<NonnullRefPtr<OpenFileDescription>> create(Process const&, Credentials const&, StringView path, int options, mode_t mode, Custody& parent_custody, Optional<UidAndGid> = {});
     ErrorOr<void> mkdir(Credentials const&, StringView path, mode_t mode, Custody& base);
     ErrorOr<void> link(Credentials const&, StringView old_path, StringView new_path, Custody& base);
     ErrorOr<void> unlink(Credentials const&, StringView path, Custody& base);

Kernel/Net/LocalSocket.cpp

@@ -472,8 +472,9 @@ ErrorOr<void> LocalSocket::chown(Credentials const& credentials, OpenFileDescrip
     return {};
 }
 
-Vector<NonnullLockRefPtr<OpenFileDescription>>& LocalSocket::recvfd_queue_for(OpenFileDescription const& description)
+Vector<NonnullRefPtr<OpenFileDescription>>& LocalSocket::recvfd_queue_for(OpenFileDescription const& description)
 {
+    VERIFY(mutex().is_exclusively_locked_by_current_thread());
     auto role = this->role(description);
     if (role == Role::Connected)
         return m_fds_for_client;
@@ -482,8 +483,9 @@ Vector<NonnullLockRefPtr<OpenFileDescription>>& LocalSocket::recvfd_queue_for(Op
     VERIFY_NOT_REACHED();
 }
 
-Vector<NonnullLockRefPtr<OpenFileDescription>>& LocalSocket::sendfd_queue_for(OpenFileDescription const& description)
+Vector<NonnullRefPtr<OpenFileDescription>>& LocalSocket::sendfd_queue_for(OpenFileDescription const& description)
 {
+    VERIFY(mutex().is_exclusively_locked_by_current_thread());
     auto role = this->role(description);
     if (role == Role::Connected)
         return m_fds_for_server;
@@ -492,7 +494,7 @@ Vector<NonnullLockRefPtr<OpenFileDescription>>& LocalSocket::sendfd_queue_for(Op
     VERIFY_NOT_REACHED();
 }
 
-ErrorOr<void> LocalSocket::sendfd(OpenFileDescription const& socket_description, NonnullLockRefPtr<OpenFileDescription> passing_description)
+ErrorOr<void> LocalSocket::sendfd(OpenFileDescription const& socket_description, NonnullRefPtr<OpenFileDescription> passing_description)
 {
     MutexLocker locker(mutex());
     auto role = this->role(socket_description);
@@ -506,7 +508,7 @@ ErrorOr<void> LocalSocket::sendfd(OpenFileDescription const& socket_description,
     return {};
 }
 
-ErrorOr<NonnullLockRefPtr<OpenFileDescription>> LocalSocket::recvfd(OpenFileDescription const& socket_description)
+ErrorOr<NonnullRefPtr<OpenFileDescription>> LocalSocket::recvfd(OpenFileDescription const& socket_description)
 {
     MutexLocker locker(mutex());
     auto role = this->role(socket_description);
@@ -520,10 +522,10 @@ ErrorOr<NonnullLockRefPtr<OpenFileDescription>> LocalSocket::recvfd(OpenFileDesc
     return queue.take_first();
 }
 
-ErrorOr<Vector<NonnullLockRefPtr<OpenFileDescription>>> LocalSocket::recvfds(OpenFileDescription const& socket_description, int n)
+ErrorOr<Vector<NonnullRefPtr<OpenFileDescription>>> LocalSocket::recvfds(OpenFileDescription const& socket_description, int n)
 {
     MutexLocker locker(mutex());
-    Vector<NonnullLockRefPtr<OpenFileDescription>> fds;
+    Vector<NonnullRefPtr<OpenFileDescription>> fds;
 
     auto role = this->role(socket_description);
     if (role != Role::Connected && role != Role::Accepted)

Kernel/Net/LocalSocket.h

@@ -15,8 +15,8 @@ namespace Kernel {
 class OpenFileDescription;
 
 struct SocketPair {
-    NonnullLockRefPtr<OpenFileDescription> description0;
-    NonnullLockRefPtr<OpenFileDescription> description1;
+    NonnullRefPtr<OpenFileDescription> description0;
+    NonnullRefPtr<OpenFileDescription> description1;
 };
 
 class LocalSocket final : public Socket {
@@ -26,9 +26,9 @@ public:
     static ErrorOr<SocketPair> try_create_connected_pair(int type);
     virtual ~LocalSocket() override;
 
-    ErrorOr<void> sendfd(OpenFileDescription const& socket_description, NonnullLockRefPtr<OpenFileDescription> passing_description);
-    ErrorOr<NonnullLockRefPtr<OpenFileDescription>> recvfd(OpenFileDescription const& socket_description);
-    ErrorOr<Vector<NonnullLockRefPtr<OpenFileDescription>>> recvfds(OpenFileDescription const& socket_description, int n);
+    ErrorOr<void> sendfd(OpenFileDescription const& socket_description, NonnullRefPtr<OpenFileDescription> passing_description);
+    ErrorOr<NonnullRefPtr<OpenFileDescription>> recvfd(OpenFileDescription const& socket_description);
+    ErrorOr<Vector<NonnullRefPtr<OpenFileDescription>>> recvfds(OpenFileDescription const& socket_description, int n);
 
     static void for_each(Function<void(LocalSocket const&)>);
     static ErrorOr<void> try_for_each(Function<ErrorOr<void>(LocalSocket const&)>);
@@ -60,8 +60,8 @@ private:
     bool has_attached_peer(OpenFileDescription const&) const;
     DoubleBuffer* receive_buffer_for(OpenFileDescription&);
     DoubleBuffer* send_buffer_for(OpenFileDescription&);
-    Vector<NonnullLockRefPtr<OpenFileDescription>>& sendfd_queue_for(OpenFileDescription const&);
-    Vector<NonnullLockRefPtr<OpenFileDescription>>& recvfd_queue_for(OpenFileDescription const&);
+    Vector<NonnullRefPtr<OpenFileDescription>>& sendfd_queue_for(OpenFileDescription const&);
+    Vector<NonnullRefPtr<OpenFileDescription>>& recvfd_queue_for(OpenFileDescription const&);
 
     void set_connect_side_role(Role connect_side_role, bool force_evaluate_block_conditions = false)
     {
@@ -101,8 +101,8 @@ private:
     NonnullOwnPtr<DoubleBuffer> m_for_client;
     NonnullOwnPtr<DoubleBuffer> m_for_server;
 
-    Vector<NonnullLockRefPtr<OpenFileDescription>> m_fds_for_client;
-    Vector<NonnullLockRefPtr<OpenFileDescription>> m_fds_for_server;
+    Vector<NonnullRefPtr<OpenFileDescription>> m_fds_for_client;
+    Vector<NonnullRefPtr<OpenFileDescription>> m_fds_for_server;
 
     IntrusiveListNode<LocalSocket> m_list_node;
 

Kernel/Process.cpp

@@ -570,13 +570,13 @@ Process::OpenFileDescriptionAndFlags& Process::OpenFileDescriptions::at(size_t i
     return m_fds_metadatas[i];
 }
 
-ErrorOr<NonnullLockRefPtr<OpenFileDescription>> Process::OpenFileDescriptions::open_file_description(int fd) const
+ErrorOr<NonnullRefPtr<OpenFileDescription>> Process::OpenFileDescriptions::open_file_description(int fd) const
 {
     if (fd < 0)
         return EBADF;
     if (static_cast<size_t>(fd) >= m_fds_metadatas.size())
         return EBADF;
-    LockRefPtr description = m_fds_metadatas[fd].description();
+    RefPtr description = m_fds_metadatas[fd].description();
     if (!description)
         return EBADF;
     return description.release_nonnull();
@@ -706,7 +706,7 @@ ErrorOr<void> Process::dump_perfcore()
         return KString::formatted("{}_{}", process_name->view(), pid().value());
     }));
     auto perfcore_filename = TRY(KString::formatted("{}.profile", base_filename));
-    LockRefPtr<OpenFileDescription> description;
+    RefPtr<OpenFileDescription> description;
     auto credentials = this->credentials();
     for (size_t attempt = 1; attempt <= 10; ++attempt) {
         auto description_or_error = VirtualFileSystem::the().open(*this, credentials, perfcore_filename->view(), O_CREAT | O_EXCL, 0400, current_directory(), UidAndGid { 0, 0 });
@@ -945,7 +945,7 @@ void Process::OpenFileDescriptionAndFlags::clear()
     m_flags = 0;
 }
 
-void Process::OpenFileDescriptionAndFlags::set(NonnullLockRefPtr<OpenFileDescription>&& description, u32 flags)
+void Process::OpenFileDescriptionAndFlags::set(NonnullRefPtr<OpenFileDescription> description, u32 flags)
 {
     m_description = move(description);
     m_flags = flags;

Kernel/Process.h

@@ -475,7 +475,7 @@ public:
 
     ErrorOr<void> exec(NonnullOwnPtr<KString> path, Vector<NonnullOwnPtr<KString>> arguments, Vector<NonnullOwnPtr<KString>> environment, Thread*& new_main_thread, InterruptsState& previous_interrupts_state, int recursion_depth = 0);
 
-    ErrorOr<LoadResult> load(NonnullLockRefPtr<OpenFileDescription> main_program_description, LockRefPtr<OpenFileDescription> interpreter_description, const ElfW(Ehdr) & main_program_header);
+    ErrorOr<LoadResult> load(NonnullRefPtr<OpenFileDescription> main_program_description, RefPtr<OpenFileDescription> interpreter_description, const ElfW(Ehdr) & main_program_header);
 
     void terminate_due_to_signal(u8 signal);
     ErrorOr<void> send_signal(u8 signal, Process* sender);
@@ -605,12 +605,12 @@ private:
     bool create_perf_events_buffer_if_needed();
     void delete_perf_events_buffer();
 
-    ErrorOr<void> do_exec(NonnullLockRefPtr<OpenFileDescription> main_program_description, Vector<NonnullOwnPtr<KString>> arguments, Vector<NonnullOwnPtr<KString>> environment, LockRefPtr<OpenFileDescription> interpreter_description, Thread*& new_main_thread, InterruptsState& previous_interrupts_state, const ElfW(Ehdr) & main_program_header);
+    ErrorOr<void> do_exec(NonnullRefPtr<OpenFileDescription> main_program_description, Vector<NonnullOwnPtr<KString>> arguments, Vector<NonnullOwnPtr<KString>> environment, RefPtr<OpenFileDescription> interpreter_description, Thread*& new_main_thread, InterruptsState& previous_interrupts_state, const ElfW(Ehdr) & main_program_header);
     ErrorOr<FlatPtr> do_write(OpenFileDescription&, UserOrKernelBuffer const&, size_t, Optional<off_t> = {});
 
     ErrorOr<FlatPtr> do_statvfs(FileSystem const& path, Custody const*, statvfs* buf);
 
-    ErrorOr<LockRefPtr<OpenFileDescription>> find_elf_interpreter_for_executable(StringView path, ElfW(Ehdr) const& main_executable_header, size_t main_executable_header_size, size_t file_size);
+    ErrorOr<RefPtr<OpenFileDescription>> find_elf_interpreter_for_executable(StringView path, ElfW(Ehdr) const& main_executable_header, size_t main_executable_header_size, size_t file_size);
 
     ErrorOr<void> do_kill(Process&, int signal);
     ErrorOr<void> do_killpg(ProcessGroupID pgrp, int signal);
@@ -704,10 +704,10 @@ public:
         void set_flags(u32 flags) { m_flags = flags; }
 
         void clear();
-        void set(NonnullLockRefPtr<OpenFileDescription>&&, u32 flags = 0);
+        void set(NonnullRefPtr<OpenFileDescription>, u32 flags = 0);
 
     private:
-        LockRefPtr<OpenFileDescription> m_description;
+        RefPtr<OpenFileDescription> m_description;
         bool m_is_allocated { false };
         u32 m_flags { 0 };
     };
@@ -758,7 +758,7 @@ public:
             m_fds_metadatas.clear();
         }
 
-        ErrorOr<NonnullLockRefPtr<OpenFileDescription>> open_file_description(int fd) const;
+        ErrorOr<NonnullRefPtr<OpenFileDescription>> open_file_description(int fd) const;
 
     private:
         static constexpr size_t s_max_open_file_descriptors { FD_SETSIZE };
@@ -808,12 +808,12 @@ public:
     MutexProtected<OpenFileDescriptions>& fds() { return m_fds; }
     MutexProtected<OpenFileDescriptions> const& fds() const { return m_fds; }
 
-    ErrorOr<NonnullLockRefPtr<OpenFileDescription>> open_file_description(int fd)
+    ErrorOr<NonnullRefPtr<OpenFileDescription>> open_file_description(int fd)
     {
         return m_fds.with_shared([fd](auto& fds) { return fds.open_file_description(fd); });
     }
 
-    ErrorOr<NonnullLockRefPtr<OpenFileDescription>> open_file_description(int fd) const
+    ErrorOr<NonnullRefPtr<OpenFileDescription>> open_file_description(int fd) const
     {
         return m_fds.with_shared([fd](auto& fds) { return fds.open_file_description(fd); });
     }

Kernel/Syscalls/anon_create.cpp

@@ -38,7 +38,7 @@ ErrorOr<FlatPtr> Process::sys$anon_create(size_t size, int options)
 
     return m_fds.with_exclusive([&](auto& fds) -> ErrorOr<FlatPtr> {
         auto new_fd = TRY(fds.allocate());
-        fds[new_fd.fd].set(move(description), fd_flags);
+        fds[new_fd.fd].set(description, fd_flags);
         return new_fd.fd;
     });
 }

Kernel/Syscalls/execve.cpp

@@ -423,8 +423,8 @@ static ErrorOr<LoadResult> load_elf_object(NonnullOwnPtr<Memory::AddressSpace> n
 }
 
 ErrorOr<LoadResult>
-Process::load(NonnullLockRefPtr<OpenFileDescription> main_program_description,
-    LockRefPtr<OpenFileDescription> interpreter_description, const ElfW(Ehdr) & main_program_header)
+Process::load(NonnullRefPtr<OpenFileDescription> main_program_description,
+    RefPtr<OpenFileDescription> interpreter_description, const ElfW(Ehdr) & main_program_header)
 {
     auto new_space = TRY(Memory::AddressSpace::try_create(nullptr));
 
@@ -471,8 +471,8 @@ void Process::clear_signal_handlers_for_exec()
     }
 }
 
-ErrorOr<void> Process::do_exec(NonnullLockRefPtr<OpenFileDescription> main_program_description, Vector<NonnullOwnPtr<KString>> arguments, Vector<NonnullOwnPtr<KString>> environment,
-    LockRefPtr<OpenFileDescription> interpreter_description, Thread*& new_main_thread, InterruptsState& previous_interrupts_state, const ElfW(Ehdr) & main_program_header)
+ErrorOr<void> Process::do_exec(NonnullRefPtr<OpenFileDescription> main_program_description, Vector<NonnullOwnPtr<KString>> arguments, Vector<NonnullOwnPtr<KString>> environment,
+    RefPtr<OpenFileDescription> interpreter_description, Thread*& new_main_thread, InterruptsState& previous_interrupts_state, const ElfW(Ehdr) & main_program_header)
 {
     VERIFY(is_user_process());
     VERIFY(!Processor::in_critical());
@@ -784,7 +784,7 @@ static ErrorOr<Vector<NonnullOwnPtr<KString>>> find_shebang_interpreter_for_exec
     return ENOEXEC;
 }
 
-ErrorOr<LockRefPtr<OpenFileDescription>> Process::find_elf_interpreter_for_executable(StringView path, ElfW(Ehdr) const& main_executable_header, size_t main_executable_header_size, size_t file_size)
+ErrorOr<RefPtr<OpenFileDescription>> Process::find_elf_interpreter_for_executable(StringView path, ElfW(Ehdr) const& main_executable_header, size_t main_executable_header_size, size_t file_size)
 {
     // Not using ErrorOr here because we'll want to do the same thing in userspace in the RTLD
     StringBuilder interpreter_path_builder;

Kernel/Syscalls/mmap.cpp

@@ -196,7 +196,7 @@ ErrorOr<FlatPtr> Process::sys$mmap(Userspace<Syscall::SC_mmap_params const*> use
 
     Memory::Region* region = nullptr;
 
-    LockRefPtr<OpenFileDescription> description;
+    RefPtr<OpenFileDescription> description;
     LockRefPtr<Memory::VMObject> vmobject;
     u64 used_offset = 0;
 

Kernel/Syscalls/poll.cpp

@@ -51,7 +51,7 @@ ErrorOr<FlatPtr> Process::sys$poll(Userspace<Syscall::SC_poll_params const*> use
     TRY(m_fds.with_shared([&](auto& fds) -> ErrorOr<void> {
         for (size_t i = 0; i < params.nfds; i++) {
             auto& pfd = fds_copy[i];
-            LockRefPtr<OpenFileDescription> description;
+            RefPtr<OpenFileDescription> description;
             auto description_or_error = fds.open_file_description(pfd.fd);
             if (!description_or_error.is_error())
                 description = description_or_error.release_value();

Kernel/Syscalls/read.cpp

@@ -13,7 +13,7 @@ namespace Kernel {
 
 using BlockFlags = Thread::FileBlocker::BlockFlags;
 
-static ErrorOr<NonnullLockRefPtr<OpenFileDescription>> open_readable_file_description(auto& fds, int fd)
+static ErrorOr<NonnullRefPtr<OpenFileDescription>> open_readable_file_description(auto& fds, int fd)
 {
     auto description = TRY(fds.with_shared([&](auto& fds) { return fds.open_file_description(fd); }));
     if (!description->is_readable())

Kernel/Syscalls/socket.cpp

@@ -20,7 +20,7 @@ namespace Kernel {
             TRY(require_promise(Pledge::unix));   \
     } while (0)
 
-static void setup_socket_fd(Process::OpenFileDescriptions& fds, int fd, NonnullLockRefPtr<OpenFileDescription> description, int type)
+static void setup_socket_fd(Process::OpenFileDescriptions& fds, int fd, NonnullRefPtr<OpenFileDescription> description, int type)
 {
     description->set_readable(true);
     description->set_writable(true);
@@ -94,7 +94,7 @@ ErrorOr<FlatPtr> Process::sys$accept4(Userspace<Syscall::SC_accept4_params const
         TRY(copy_from_user(&address_size, static_ptr_cast<socklen_t const*>(user_address_size)));
 
     ScopedDescriptionAllocation fd_allocation;
-    LockRefPtr<OpenFileDescription> accepting_socket_description;
+    RefPtr<OpenFileDescription> accepting_socket_description;
 
     TRY(m_fds.with_exclusive([&](auto& fds) -> ErrorOr<void> {
         fd_allocation = TRY(fds.allocate());

Kernel/Syscalls/utimensat.cpp

@@ -38,7 +38,7 @@ ErrorOr<FlatPtr> Process::sys$utimensat(Userspace<Syscall::SC_utimensat_params c
     }
 
     OwnPtr<KString> path;
-    LockRefPtr<OpenFileDescription> description;
+    RefPtr<OpenFileDescription> description;
     RefPtr<Custody> base;
 
     auto path_or_error = get_syscall_path_argument(params.path);

Kernel/TTY/PTYMultiplexer.cpp

@@ -38,9 +38,9 @@ UNMAP_AFTER_INIT void PTYMultiplexer::initialize()
     MUST(the().after_inserting());
 }
 
-ErrorOr<NonnullLockRefPtr<OpenFileDescription>> PTYMultiplexer::open(int options)
+ErrorOr<NonnullRefPtr<OpenFileDescription>> PTYMultiplexer::open(int options)
 {
-    return m_freelist.with([&](auto& freelist) -> ErrorOr<NonnullLockRefPtr<OpenFileDescription>> {
+    return m_freelist.with([&](auto& freelist) -> ErrorOr<NonnullRefPtr<OpenFileDescription>> {
         if (freelist.is_empty())
             return EBUSY;
 

Kernel/TTY/PTYMultiplexer.h

@@ -22,7 +22,7 @@ public:
     static PTYMultiplexer& the();
 
     // ^CharacterDevice
-    virtual ErrorOr<NonnullLockRefPtr<OpenFileDescription>> open(int options) override;
+    virtual ErrorOr<NonnullRefPtr<OpenFileDescription>> open(int options) override;
     virtual ErrorOr<size_t> read(OpenFileDescription&, u64, UserOrKernelBuffer&, size_t) override { return 0; }
     virtual ErrorOr<size_t> write(OpenFileDescription&, u64, UserOrKernelBuffer const&, size_t) override { return 0; }
     virtual bool can_read(OpenFileDescription const&, u64) const override { return true; }

Kernel/Thread.h

@@ -519,7 +519,7 @@ public:
         explicit OpenFileDescriptionBlocker(OpenFileDescription&, BlockFlags, BlockFlags&);
 
     private:
-        NonnullLockRefPtr<OpenFileDescription> m_blocked_description;
+        NonnullRefPtr<OpenFileDescription> m_blocked_description;
         const BlockFlags m_flags;
         BlockFlags& m_unblocked_flags;
         bool m_did_unblock { false };
@@ -577,7 +577,7 @@ public:
     class SelectBlocker final : public FileBlocker {
     public:
         struct FDInfo {
-            LockRefPtr<OpenFileDescription> description;
+            RefPtr<OpenFileDescription> description;
             BlockFlags block_flags { BlockFlags::None };
             BlockFlags unblocked_flags { BlockFlags::None };
         };