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

Browse source 
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.
This commit is contained in:
Andreas Kling 2023-03-06 19:29:25 +01:00
parent 36b0ecfe9e
commit d1371d66f7
34 changed files with 82 additions and 80 deletions
Download patch file Download diff file Expand all files Collapse all files

2
Kernel/Bus/VirtIO/ConsolePort.cpp
View file

@ -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);

2
Kernel/Bus/VirtIO/ConsolePort.h
View file

@ -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 {};

4
Kernel/Coredump.cpp
View file

@ -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()));

6
Kernel/Coredump.h
View file

@ -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;
};

2
Kernel/Devices/Device.cpp
View file

@ -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())

2
Kernel/Devices/Device.h
View file

@ -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; }

2
Kernel/Devices/KCOVDevice.cpp
View file

@ -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())

2
Kernel/Devices/KCOVDevice.h
View file

@ -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();

2
Kernel/Devices/SelfTTYDevice.cpp
View file

@ -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.

2
Kernel/Devices/SelfTTYDevice.h
View file

@ -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;

4
Kernel/FileSystem/FIFO.cpp
View file

@ -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);

4
Kernel/FileSystem/FIFO.h
View file

@ -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"

2
Kernel/FileSystem/File.cpp
View file

@ -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()) {

2
Kernel/FileSystem/File.h
View file

@ -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;

2
Kernel/FileSystem/FileBackedFileSystem.h
View file

@ -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;
};
}

8
Kernel/FileSystem/OpenFileDescription.cpp
View file

@ -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;
}

4
Kernel/FileSystem/OpenFileDescription.h
View file

@ -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;

4
Kernel/FileSystem/ProcFS/ProcessExposed.cpp
View file

@ -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()));

8
Kernel/FileSystem/VirtualFileSystem.cpp
View file

@ -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());

8
Kernel/FileSystem/VirtualFileSystem.h
View file

@ -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);

14
Kernel/Net/LocalSocket.cpp
View file

@ -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)

18
Kernel/Net/LocalSocket.h
View file

@ -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;

8
Kernel/Process.cpp
View file

@ -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;

16
Kernel/Process.h
View file

@ -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); });
}

2
Kernel/Syscalls/anon_create.cpp
View file

@ -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;
});
}

10
Kernel/Syscalls/execve.cpp
View file

@ -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;

2
Kernel/Syscalls/mmap.cpp
View file

@ -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;

2
Kernel/Syscalls/poll.cpp
View file

@ -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();

2
Kernel/Syscalls/read.cpp
View file

@ -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())

4
Kernel/Syscalls/socket.cpp
View file

@ -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());

2
Kernel/Syscalls/utimensat.cpp
View file

@ -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);

4
Kernel/TTY/PTYMultiplexer.cpp
View file

@ -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;

2
Kernel/TTY/PTYMultiplexer.h
View file

@ -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; }

4
Kernel/Thread.h
View file

@ -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 };
};