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Kernel: Replace KResult and KResultOr<T> with Error and ErrorOr<T>

Browse source 
We now use AK::Error and AK::ErrorOr<T> in both kernel and userspace!
This was a slightly tedious refactoring that took a long time, so it's
not unlikely that some bugs crept in.

Nevertheless, it does pass basic functionality testing, and it's just
real nice to finally see the same pattern in all contexts. :^)
This commit is contained in:
Andreas Kling 2021-11-08 00:51:39 +01:00
parent 7ee10c6926
commit 79fa9765ca
262 changed files with 2415 additions and 2600 deletions
Download patch file Download diff file Expand all files Collapse all files

8
Kernel/Devices/AsyncDeviceRequest.h
View file

@ -81,7 +81,7 @@ public:
void* get_private() const { return m_private; }
template<typename... Args>
KResult write_to_buffer(UserOrKernelBuffer& buffer, Args... args)
ErrorOr<void> write_to_buffer(UserOrKernelBuffer& buffer, Args... args)
{
if (in_target_context(buffer))
return buffer.write(forward<Args>(args)...);
@ -90,7 +90,7 @@ public:
}
template<size_t BUFFER_BYTES, typename... Args>
KResultOr<size_t> write_to_buffer_buffered(UserOrKernelBuffer& buffer, Args... args)
ErrorOr<size_t> write_to_buffer_buffered(UserOrKernelBuffer& buffer, Args... args)
{
if (in_target_context(buffer))
return buffer.write_buffered<BUFFER_BYTES>(forward<Args>(args)...);
@ -99,7 +99,7 @@ public:
}
template<typename... Args>
KResult read_from_buffer(const UserOrKernelBuffer& buffer, Args... args)
ErrorOr<void> read_from_buffer(const UserOrKernelBuffer& buffer, Args... args)
{
if (in_target_context(buffer))
return buffer.read(forward<Args>(args)...);
@ -108,7 +108,7 @@ public:
}
template<size_t BUFFER_BYTES, typename... Args>
KResultOr<size_t> read_from_buffer_buffered(const UserOrKernelBuffer& buffer, Args... args)
ErrorOr<size_t> read_from_buffer_buffered(const UserOrKernelBuffer& buffer, Args... args)
{
if (in_target_context(buffer))
return buffer.read_buffered<BUFFER_BYTES>(forward<Args>(args)...);

4
Kernel/Devices/ConsoleDevice.cpp
View file

@ -37,14 +37,14 @@ bool ConsoleDevice::can_read(const Kernel::OpenFileDescription&, size_t) const
return false;
}
Kernel::KResultOr<size_t> ConsoleDevice::read(OpenFileDescription&, u64, Kernel::UserOrKernelBuffer&, size_t)
ErrorOr<size_t> ConsoleDevice::read(OpenFileDescription&, u64, Kernel::UserOrKernelBuffer&, size_t)
{
// FIXME: Implement reading from the console.
// Maybe we could use a ring buffer for this device?
return 0;
}
Kernel::KResultOr<size_t> ConsoleDevice::write(OpenFileDescription&, u64, const Kernel::UserOrKernelBuffer& data, size_t size)
ErrorOr<size_t> ConsoleDevice::write(OpenFileDescription&, u64, const Kernel::UserOrKernelBuffer& data, size_t size)
{
if (!size)
return 0;

4
Kernel/Devices/ConsoleDevice.h
View file

@ -24,8 +24,8 @@ public:
// ^CharacterDevice
virtual bool can_read(const Kernel::OpenFileDescription&, size_t) const override;
virtual bool can_write(const Kernel::OpenFileDescription&, size_t) const override { return true; }
virtual Kernel::KResultOr<size_t> read(OpenFileDescription&, u64, Kernel::UserOrKernelBuffer&, size_t) override;
virtual Kernel::KResultOr<size_t> write(OpenFileDescription&, u64, const Kernel::UserOrKernelBuffer&, size_t) override;
virtual ErrorOr<size_t> read(OpenFileDescription&, u64, Kernel::UserOrKernelBuffer&, size_t) override;
virtual ErrorOr<size_t> write(OpenFileDescription&, u64, const Kernel::UserOrKernelBuffer&, size_t) override;
virtual StringView class_name() const override { return "Console"sv; }
void put_char(char);

10
Kernel/Devices/Device.cpp
View file

@ -44,7 +44,7 @@ SysFSBlockDevicesDirectory::SysFSBlockDevicesDirectory(SysFSDevicesDirectory con
: SysFSDirectory("block"sv, devices_directory)
{
}
KResult SysFSBlockDevicesDirectory::traverse_as_directory(unsigned fsid, Function<bool(FileSystem::DirectoryEntryView const&)> callback) const
ErrorOr<void> SysFSBlockDevicesDirectory::traverse_as_directory(unsigned fsid, Function<bool(FileSystem::DirectoryEntryView const&)> callback) const
{
VERIFY(m_parent_directory);
callback({ ".", { fsid, component_index() }, 0 });
@ -57,7 +57,7 @@ KResult SysFSBlockDevicesDirectory::traverse_as_directory(unsigned fsid, Functio
callback({ exposed_device.name(), { fsid, exposed_device.component_index() }, 0 });
}
});
return KSuccess;
return {};
}
RefPtr<SysFSComponent> SysFSBlockDevicesDirectory::lookup(StringView name)
{
@ -80,7 +80,7 @@ SysFSCharacterDevicesDirectory::SysFSCharacterDevicesDirectory(SysFSDevicesDirec
: SysFSDirectory("char"sv, devices_directory)
{
}
KResult SysFSCharacterDevicesDirectory::traverse_as_directory(unsigned fsid, Function<bool(FileSystem::DirectoryEntryView const&)> callback) const
ErrorOr<void> SysFSCharacterDevicesDirectory::traverse_as_directory(unsigned fsid, Function<bool(FileSystem::DirectoryEntryView const&)> callback) const
{
VERIFY(m_parent_directory);
callback({ ".", { fsid, component_index() }, 0 });
@ -93,7 +93,7 @@ KResult SysFSCharacterDevicesDirectory::traverse_as_directory(unsigned fsid, Fun
callback({ exposed_device.name(), { fsid, exposed_device.component_index() }, 0 });
}
});
return KSuccess;
return {};
}
RefPtr<SysFSComponent> SysFSCharacterDevicesDirectory::lookup(StringView name)
{
@ -140,7 +140,7 @@ Device::~Device()
VERIFY(m_state == State::BeingRemoved);
}
KResultOr<NonnullOwnPtr<KString>> Device::pseudo_path(const OpenFileDescription&) const
ErrorOr<NonnullOwnPtr<KString>> Device::pseudo_path(const OpenFileDescription&) const
{
return KString::try_create(String::formatted("device:{},{}", major(), minor()));
}

6
Kernel/Devices/Device.h
View file

@ -15,10 +15,10 @@
// - BlockDevice (random access)
// - CharacterDevice (sequential)
#include <AK/DoublyLinkedList.h>
#include <AK/Error.h>
#include <AK/Function.h>
#include <AK/HashMap.h>
#include <AK/RefPtr.h>
#include <Kernel/API/KResult.h>
#include <Kernel/Devices/AsyncDeviceRequest.h>
#include <Kernel/FileSystem/File.h>
#include <Kernel/FileSystem/SysFS.h>
@ -40,7 +40,7 @@ public:
unsigned major() const { return m_major; }
unsigned minor() const { return m_minor; }
virtual KResultOr<NonnullOwnPtr<KString>> pseudo_path(const OpenFileDescription&) const override;
virtual ErrorOr<NonnullOwnPtr<KString>> pseudo_path(const OpenFileDescription&) const override;
UserID uid() const { return m_uid; }
GroupID gid() const { return m_gid; }
@ -51,7 +51,7 @@ public:
void process_next_queued_request(Badge<AsyncDeviceRequest>, const AsyncDeviceRequest&);
template<typename AsyncRequestType, typename... Args>
KResultOr<NonnullRefPtr<AsyncRequestType>> try_make_request(Args&&... args)
ErrorOr<NonnullRefPtr<AsyncRequestType>> try_make_request(Args&&... args)
{
auto request = TRY(adopt_nonnull_ref_or_enomem(new (nothrow) AsyncRequestType(*this, forward<Args>(args)...)));
SpinlockLocker lock(m_requests_lock);

4
Kernel/Devices/DeviceManagement.h
View file

@ -7,12 +7,12 @@
#pragma once
#include <AK/Badge.h>
#include <AK/Error.h>
#include <AK/NonnullRefPtrVector.h>
#include <AK/OwnPtr.h>
#include <AK/RefPtr.h>
#include <AK/Time.h>
#include <AK/Types.h>
#include <Kernel/API/KResult.h>
#include <Kernel/API/TimePage.h>
#include <Kernel/Arch/RegisterState.h>
#include <Kernel/Devices/ConsoleDevice.h>
@ -51,7 +51,7 @@ public:
ConsoleDevice& console_device();
template<typename DeviceType, typename... Args>
static inline KResultOr<NonnullRefPtr<DeviceType>> try_create_device(Args&&... args)
static inline ErrorOr<NonnullRefPtr<DeviceType>> try_create_device(Args&&... args)
{
auto device = TRY(adopt_nonnull_ref_or_enomem(new DeviceType(forward<Args>(args)...)));
device->after_inserting();

4
Kernel/Devices/FullDevice.cpp
View file

@ -34,13 +34,13 @@ bool FullDevice::can_read(const OpenFileDescription&, size_t) const
return true;
}
KResultOr<size_t> FullDevice::read(OpenFileDescription&, u64, UserOrKernelBuffer& buffer, size_t size)
ErrorOr<size_t> FullDevice::read(OpenFileDescription&, u64, UserOrKernelBuffer& buffer, size_t size)
{
TRY(buffer.memset(0, size));
return size;
}
KResultOr<size_t> FullDevice::write(OpenFileDescription&, u64, const UserOrKernelBuffer&, size_t size)
ErrorOr<size_t> FullDevice::write(OpenFileDescription&, u64, const UserOrKernelBuffer&, size_t size)
{
if (size == 0)
return 0;

4
Kernel/Devices/FullDevice.h
View file

@ -22,8 +22,8 @@ private:
FullDevice();
// ^CharacterDevice
virtual KResultOr<size_t> read(OpenFileDescription&, u64, UserOrKernelBuffer&, size_t) override;
virtual KResultOr<size_t> write(OpenFileDescription&, u64, const UserOrKernelBuffer&, size_t) override;
virtual ErrorOr<size_t> read(OpenFileDescription&, u64, UserOrKernelBuffer&, size_t) override;
virtual ErrorOr<size_t> write(OpenFileDescription&, u64, const UserOrKernelBuffer&, size_t) override;
virtual bool can_read(const OpenFileDescription&, size_t) const override;
virtual bool can_write(const OpenFileDescription&, size_t) const override { return true; }
virtual StringView class_name() const override { return "FullDevice"sv; }

2
Kernel/Devices/HID/HIDManagement.h
View file

@ -8,11 +8,11 @@
#include <AK/Atomic.h>
#include <AK/CircularQueue.h>
#include <AK/Error.h>
#include <AK/NonnullRefPtrVector.h>
#include <AK/RefPtr.h>
#include <AK/Time.h>
#include <AK/Types.h>
#include <Kernel/API/KResult.h>
#include <Kernel/API/KeyCode.h>
#include <Kernel/API/MousePacket.h>
#include <Kernel/Locking/Spinlock.h>

16
Kernel/Devices/HID/KeyboardDevice.cpp
View file

@ -278,7 +278,7 @@ bool KeyboardDevice::can_read(const OpenFileDescription&, size_t) const
return !m_queue.is_empty();
}
KResultOr<size_t> KeyboardDevice::read(OpenFileDescription&, u64, UserOrKernelBuffer& buffer, size_t size)
ErrorOr<size_t> KeyboardDevice::read(OpenFileDescription&, u64, UserOrKernelBuffer& buffer, size_t size)
{
size_t nread = 0;
SpinlockLocker lock(m_queue_lock);
@ -292,13 +292,11 @@ KResultOr<size_t> KeyboardDevice::read(OpenFileDescription&, u64, UserOrKernelBu
lock.unlock();
auto result = buffer.write_buffered<sizeof(Event)>(sizeof(Event), [&](Bytes bytes) {
auto result = TRY(buffer.write_buffered<sizeof(Event)>(sizeof(Event), [&](Bytes bytes) {
memcpy(bytes.data(), &event, sizeof(Event));
return bytes.size();
});
if (result.is_error())
return result.error();
VERIFY(result.value() == sizeof(Event));
}));
VERIFY(result == sizeof(Event));
nread += sizeof(Event);
lock.lock();
@ -306,7 +304,7 @@ KResultOr<size_t> KeyboardDevice::read(OpenFileDescription&, u64, UserOrKernelBu
return nread;
}
KResult KeyboardDevice::ioctl(OpenFileDescription&, unsigned request, Userspace<void*> arg)
ErrorOr<void> KeyboardDevice::ioctl(OpenFileDescription&, unsigned request, Userspace<void*> arg)
{
switch (request) {
case KEYBOARD_IOCTL_GET_NUM_LOCK: {
@ -319,7 +317,7 @@ KResult KeyboardDevice::ioctl(OpenFileDescription&, unsigned request, Userspace<
if (num_lock_value != 0 && num_lock_value != 1)
return EINVAL;
m_num_lock_on = !!num_lock_value;
return KSuccess;
return {};
}
case KEYBOARD_IOCTL_GET_CAPS_LOCK: {
auto output = static_ptr_cast<bool*>(arg);
@ -330,7 +328,7 @@ KResult KeyboardDevice::ioctl(OpenFileDescription&, unsigned request, Userspace<
if (caps_lock_value != 0 && caps_lock_value != 1)
return EINVAL;
m_caps_lock_on = !!caps_lock_value;
return KSuccess;
return {};
}
default:
return EINVAL;

6
Kernel/Devices/HID/KeyboardDevice.h
View file

@ -25,16 +25,16 @@ public:
virtual ~KeyboardDevice() override;
// ^CharacterDevice
virtual KResultOr<size_t> read(OpenFileDescription&, u64, UserOrKernelBuffer&, size_t) override;
virtual ErrorOr<size_t> read(OpenFileDescription&, u64, UserOrKernelBuffer&, size_t) override;
virtual bool can_read(const OpenFileDescription&, size_t) const override;
virtual KResultOr<size_t> write(OpenFileDescription&, u64, const UserOrKernelBuffer&, size_t) override { return EINVAL; }
virtual ErrorOr<size_t> write(OpenFileDescription&, u64, const UserOrKernelBuffer&, size_t) override { return EINVAL; }
virtual bool can_write(const OpenFileDescription&, size_t) const override { return true; }
// ^HIDDevice
virtual Type instrument_type() const override { return Type::Keyboard; }
// ^File
virtual KResult ioctl(OpenFileDescription&, unsigned request, Userspace<void*> arg) override;
virtual ErrorOr<void> ioctl(OpenFileDescription&, unsigned request, Userspace<void*> arg) override;
void update_modifier(u8 modifier, bool state)
{

2
Kernel/Devices/HID/MouseDevice.cpp
View file

@ -24,7 +24,7 @@ bool MouseDevice::can_read(const OpenFileDescription&, size_t) const
return !m_queue.is_empty();
}
KResultOr<size_t> MouseDevice::read(OpenFileDescription&, u64, UserOrKernelBuffer& buffer, size_t size)
ErrorOr<size_t> MouseDevice::read(OpenFileDescription&, u64, UserOrKernelBuffer& buffer, size_t size)
{
VERIFY(size > 0);
size_t nread = 0;

4
Kernel/Devices/HID/MouseDevice.h
View file

@ -23,9 +23,9 @@ public:
virtual ~MouseDevice() override;
// ^CharacterDevice
virtual KResultOr<size_t> read(OpenFileDescription&, u64, UserOrKernelBuffer&, size_t) override;
virtual ErrorOr<size_t> read(OpenFileDescription&, u64, UserOrKernelBuffer&, size_t) override;
virtual bool can_read(const OpenFileDescription&, size_t) const override;
virtual KResultOr<size_t> write(OpenFileDescription&, u64, const UserOrKernelBuffer&, size_t) override { return EINVAL; }
virtual ErrorOr<size_t> write(OpenFileDescription&, u64, const UserOrKernelBuffer&, size_t) override { return EINVAL; }
virtual bool can_write(const OpenFileDescription&, size_t) const override { return true; }
// ^HIDDevice

51
Kernel/Devices/KCOVDevice.cpp
View file

@ -65,7 +65,7 @@ void KCOVDevice::free_process()
delete kcov_instance;
}
KResultOr<NonnullRefPtr<OpenFileDescription>> KCOVDevice::open(int options)
ErrorOr<NonnullRefPtr<OpenFileDescription>> KCOVDevice::open(int options)
{
auto pid = Process::current().pid();
if (proc_instance->get(pid).has_value())
@ -77,9 +77,8 @@ KResultOr<NonnullRefPtr<OpenFileDescription>> KCOVDevice::open(int options)
return File::open(options);
}
KResult KCOVDevice::ioctl(OpenFileDescription&, unsigned request, Userspace<void*> arg)
ErrorOr<void> KCOVDevice::ioctl(OpenFileDescription&, unsigned request, Userspace<void*> arg)
{
KResult return_value = KSuccess;
auto thread = Thread::current();
auto tid = thread->tid();
auto pid = thread->pid();
@ -90,48 +89,34 @@ KResult KCOVDevice::ioctl(OpenFileDescription&, unsigned request, Userspace<void
SpinlockLocker locker(kcov_instance->spinlock());
switch (request) {
case KCOV_SETBUFSIZE: {
if (kcov_instance->state() >= KCOVInstance::TRACING) {
return_value = EBUSY;
break;
}
return_value = kcov_instance->buffer_allocate((FlatPtr)arg.unsafe_userspace_ptr());
break;
}
case KCOV_ENABLE: {
if (kcov_instance->state() >= KCOVInstance::TRACING) {
return_value = EBUSY;
break;
}
if (!kcov_instance->has_buffer()) {
return_value = ENOBUFS;
break;
}
case KCOV_SETBUFSIZE:
if (kcov_instance->state() >= KCOVInstance::TRACING)
return EBUSY;
return kcov_instance->buffer_allocate((FlatPtr)arg.unsafe_userspace_ptr());
case KCOV_ENABLE:
if (kcov_instance->state() >= KCOVInstance::TRACING)
return EBUSY;
if (!kcov_instance->has_buffer())
return ENOBUFS;
VERIFY(kcov_instance->state() == KCOVInstance::OPENED);
kcov_instance->set_state(KCOVInstance::TRACING);
thread_instance->set(tid, kcov_instance);
break;
}
return {};
case KCOV_DISABLE: {
auto maybe_kcov_instance = thread_instance->get(tid);
if (!maybe_kcov_instance.has_value()) {
return_value = ENOENT;
break;
}
if (!maybe_kcov_instance.has_value())
return ENOENT;
VERIFY(kcov_instance->state() == KCOVInstance::TRACING);
kcov_instance->set_state(KCOVInstance::OPENED);
thread_instance->remove(tid);
break;
return {};
}
default: {
return_value = EINVAL;
default:
return EINVAL;
}
};
return return_value;
}
KResultOr<Memory::Region*> KCOVDevice::mmap(Process& process, OpenFileDescription&, Memory::VirtualRange const& range, u64 offset, int prot, bool shared)
ErrorOr<Memory::Region*> KCOVDevice::mmap(Process& process, OpenFileDescription&, Memory::VirtualRange const& range, u64 offset, int prot, bool shared)
{
auto pid = process.pid();
auto maybe_kcov_instance = proc_instance->get(pid);

10
Kernel/Devices/KCOVDevice.h
View file

@ -23,8 +23,8 @@ public:
static void free_process();
// ^File
KResultOr<Memory::Region*> mmap(Process&, OpenFileDescription&, Memory::VirtualRange const&, u64 offset, int prot, bool shared) override;
KResultOr<NonnullRefPtr<OpenFileDescription>> open(int options) override;
ErrorOr<Memory::Region*> mmap(Process&, OpenFileDescription&, Memory::VirtualRange const&, u64 offset, int prot, bool shared) override;
ErrorOr<NonnullRefPtr<OpenFileDescription>> open(int options) override;
protected:
KCOVDevice();
@ -34,9 +34,9 @@ protected:
virtual bool can_read(const OpenFileDescription&, size_t) const override final { return true; }
virtual bool can_write(const OpenFileDescription&, size_t) const override final { return true; }
virtual void start_request(AsyncBlockDeviceRequest& request) override final { request.complete(AsyncDeviceRequest::Failure); }
virtual KResultOr<size_t> read(OpenFileDescription&, u64, UserOrKernelBuffer&, size_t) override { return EINVAL; }
virtual KResultOr<size_t> write(OpenFileDescription&, u64, const UserOrKernelBuffer&, size_t) override { return EINVAL; }
virtual KResult ioctl(OpenFileDescription&, unsigned request, Userspace<void*> arg) override;
virtual ErrorOr<size_t> read(OpenFileDescription&, u64, UserOrKernelBuffer&, size_t) override { return EINVAL; }
virtual ErrorOr<size_t> write(OpenFileDescription&, u64, const UserOrKernelBuffer&, size_t) override { return EINVAL; }
virtual ErrorOr<void> ioctl(OpenFileDescription&, unsigned request, Userspace<void*> arg) override;
};
}

4
Kernel/Devices/KCOVInstance.cpp
View file

@ -14,7 +14,7 @@ KCOVInstance::KCOVInstance(ProcessID pid)
m_pid = pid;
}
KResult KCOVInstance::buffer_allocate(size_t buffer_size_in_entries)
ErrorOr<void> KCOVInstance::buffer_allocate(size_t buffer_size_in_entries)
{
if (buffer_size_in_entries < 2 || buffer_size_in_entries > KCOV_MAX_ENTRIES)
return EINVAL;
@ -34,7 +34,7 @@ KResult KCOVInstance::buffer_allocate(size_t buffer_size_in_entries)
Memory::Region::Access::ReadWrite));
m_buffer = (u64*)m_kernel_region->vaddr().as_ptr();
return KSuccess;
return {};
}
void KCOVInstance::buffer_add_pc(u64 pc)

2
Kernel/Devices/KCOVInstance.h
View file

@ -31,7 +31,7 @@ class KCOVInstance final {
public:
explicit KCOVInstance(ProcessID pid);
KResult buffer_allocate(size_t buffer_size_in_entries);
ErrorOr<void> buffer_allocate(size_t buffer_size_in_entries);
bool has_buffer() const { return m_buffer != nullptr; }
void buffer_add_pc(u64 pc);

4
Kernel/Devices/MemoryDevice.cpp
View file

@ -31,7 +31,7 @@ UNMAP_AFTER_INIT MemoryDevice::~MemoryDevice()
{
}
KResultOr<size_t> MemoryDevice::read(OpenFileDescription&, u64, UserOrKernelBuffer&, size_t)
ErrorOr<size_t> MemoryDevice::read(OpenFileDescription&, u64, UserOrKernelBuffer&, size_t)
{
TODO();
}
@ -41,7 +41,7 @@ void MemoryDevice::did_seek(OpenFileDescription&, off_t)
TODO();
}
KResultOr<Memory::Region*> MemoryDevice::mmap(Process& process, OpenFileDescription&, Memory::VirtualRange const& range, u64 offset, int prot, bool shared)
ErrorOr<Memory::Region*> MemoryDevice::mmap(Process& process, OpenFileDescription&, Memory::VirtualRange const& range, u64 offset, int prot, bool shared)
{
auto viewed_address = PhysicalAddress(offset);

6
Kernel/Devices/MemoryDevice.h
View file

@ -21,7 +21,7 @@ public:
static NonnullRefPtr<MemoryDevice> must_create();
~MemoryDevice();
virtual KResultOr<Memory::Region*> mmap(Process&, OpenFileDescription&, Memory::VirtualRange const&, u64 offset, int prot, bool shared) override;
virtual ErrorOr<Memory::Region*> mmap(Process&, OpenFileDescription&, Memory::VirtualRange const&, u64 offset, int prot, bool shared) override;
private:
MemoryDevice();
@ -30,8 +30,8 @@ private:
virtual bool can_read(const OpenFileDescription&, size_t) const override { return true; }
virtual bool can_write(const OpenFileDescription&, size_t) const override { return false; }
virtual bool is_seekable() const override { return true; }
virtual KResultOr<size_t> read(OpenFileDescription&, u64, UserOrKernelBuffer&, size_t) override;
virtual KResultOr<size_t> write(OpenFileDescription&, u64, const UserOrKernelBuffer&, size_t) override { return EINVAL; }
virtual ErrorOr<size_t> read(OpenFileDescription&, u64, UserOrKernelBuffer&, size_t) override;
virtual ErrorOr<size_t> write(OpenFileDescription&, u64, const UserOrKernelBuffer&, size_t) override { return EINVAL; }
virtual void did_seek(OpenFileDescription&, off_t) override;

4
Kernel/Devices/NullDevice.cpp
View file

@ -33,12 +33,12 @@ bool NullDevice::can_read(const OpenFileDescription&, size_t) const
return true;
}
KResultOr<size_t> NullDevice::read(OpenFileDescription&, u64, UserOrKernelBuffer&, size_t)
ErrorOr<size_t> NullDevice::read(OpenFileDescription&, u64, UserOrKernelBuffer&, size_t)
{
return 0;
}
KResultOr<size_t> NullDevice::write(OpenFileDescription&, u64, const UserOrKernelBuffer&, size_t buffer_size)
ErrorOr<size_t> NullDevice::write(OpenFileDescription&, u64, const UserOrKernelBuffer&, size_t buffer_size)
{
return buffer_size;
}

4
Kernel/Devices/NullDevice.h
View file

@ -22,8 +22,8 @@ public:
private:
NullDevice();
// ^CharacterDevice
virtual KResultOr<size_t> read(OpenFileDescription&, u64, UserOrKernelBuffer&, size_t) override;
virtual KResultOr<size_t> write(OpenFileDescription&, u64, const UserOrKernelBuffer&, size_t) override;
virtual ErrorOr<size_t> read(OpenFileDescription&, u64, UserOrKernelBuffer&, size_t) override;
virtual ErrorOr<size_t> write(OpenFileDescription&, u64, const UserOrKernelBuffer&, size_t) override;
virtual bool can_write(const OpenFileDescription&, size_t) const override { return true; }
virtual bool can_read(const OpenFileDescription&, size_t) const override;
virtual StringView class_name() const override { return "NullDevice"sv; }

4
Kernel/Devices/RandomDevice.cpp
View file

@ -33,7 +33,7 @@ bool RandomDevice::can_read(const OpenFileDescription&, size_t) const
return true;
}
KResultOr<size_t> RandomDevice::read(OpenFileDescription&, u64, UserOrKernelBuffer& buffer, size_t size)
ErrorOr<size_t> RandomDevice::read(OpenFileDescription&, u64, UserOrKernelBuffer& buffer, size_t size)
{
return buffer.write_buffered<256>(size, [&](Bytes bytes) {
get_good_random_bytes(bytes);
@ -41,7 +41,7 @@ KResultOr<size_t> RandomDevice::read(OpenFileDescription&, u64, UserOrKernelBuff
});
}
KResultOr<size_t> RandomDevice::write(OpenFileDescription&, u64, const UserOrKernelBuffer&, size_t size)
ErrorOr<size_t> RandomDevice::write(OpenFileDescription&, u64, const UserOrKernelBuffer&, size_t size)
{
// FIXME: Use input for entropy? I guess that could be a neat feature?
return size;

4
Kernel/Devices/RandomDevice.h
View file

@ -22,8 +22,8 @@ private:
RandomDevice();
// ^CharacterDevice
virtual KResultOr<size_t> read(OpenFileDescription&, u64, UserOrKernelBuffer&, size_t) override;
virtual KResultOr<size_t> write(OpenFileDescription&, u64, const UserOrKernelBuffer&, size_t) override;
virtual ErrorOr<size_t> read(OpenFileDescription&, u64, UserOrKernelBuffer&, size_t) override;
virtual ErrorOr<size_t> write(OpenFileDescription&, u64, const UserOrKernelBuffer&, size_t) override;
virtual bool can_read(const OpenFileDescription&, size_t) const override;
virtual bool can_write(const OpenFileDescription&, size_t) const override { return true; }
virtual StringView class_name() const override { return "RandomDevice"sv; }

8
Kernel/Devices/SB16.cpp
View file

@ -113,7 +113,7 @@ UNMAP_AFTER_INIT void SB16::initialize()
set_sample_rate(m_sample_rate);
}
KResult SB16::ioctl(OpenFileDescription&, unsigned request, Userspace<void*> arg)
ErrorOr<void> SB16::ioctl(OpenFileDescription&, unsigned request, Userspace<void*> arg)
{
switch (request) {
case SOUNDCARD_IOCTL_GET_SAMPLE_RATE: {
@ -126,7 +126,7 @@ KResult SB16::ioctl(OpenFileDescription&, unsigned request, Userspace<void*> arg
return EINVAL;
if (m_sample_rate != sample_rate_value)
set_sample_rate(sample_rate_value);
return KSuccess;
return {};
}
default:
return EINVAL;
@ -186,7 +186,7 @@ bool SB16::can_read(OpenFileDescription const&, size_t) const
return false;
}
KResultOr<size_t> SB16::read(OpenFileDescription&, u64, UserOrKernelBuffer&, size_t)
ErrorOr<size_t> SB16::read(OpenFileDescription&, u64, UserOrKernelBuffer&, size_t)
{
return 0;
}
@ -246,7 +246,7 @@ void SB16::wait_for_irq()
disable_irq();
}
KResultOr<size_t> SB16::write(OpenFileDescription&, u64, UserOrKernelBuffer const& data, size_t length)
ErrorOr<size_t> SB16::write(OpenFileDescription&, u64, UserOrKernelBuffer const& data, size_t length)
{
if (!m_dma_region) {
auto page = MM.allocate_supervisor_physical_page();

6
Kernel/Devices/SB16.h
View file

@ -27,13 +27,13 @@ public:
// ^CharacterDevice
virtual bool can_read(const OpenFileDescription&, size_t) const override;
virtual KResultOr<size_t> read(OpenFileDescription&, u64, UserOrKernelBuffer&, size_t) override;
virtual KResultOr<size_t> write(OpenFileDescription&, u64, const UserOrKernelBuffer&, size_t) override;
virtual ErrorOr<size_t> read(OpenFileDescription&, u64, UserOrKernelBuffer&, size_t) override;
virtual ErrorOr<size_t> write(OpenFileDescription&, u64, const UserOrKernelBuffer&, size_t) override;
virtual bool can_write(const OpenFileDescription&, size_t) const override { return true; }
virtual StringView purpose() const override { return class_name(); }
virtual KResult ioctl(OpenFileDescription&, unsigned, Userspace<void*>) override;
virtual ErrorOr<void> ioctl(OpenFileDescription&, unsigned, Userspace<void*>) override;
private:
SB16();

4
Kernel/Devices/SerialDevice.cpp
View file

@ -61,7 +61,7 @@ bool SerialDevice::can_read(const OpenFileDescription&, size_t) const
return (get_line_status() & DataReady) != 0;
}
KResultOr<size_t> SerialDevice::read(OpenFileDescription&, u64, UserOrKernelBuffer& buffer, size_t size)
ErrorOr<size_t> SerialDevice::read(OpenFileDescription&, u64, UserOrKernelBuffer& buffer, size_t size)
{
if (!size)
return 0;
@ -82,7 +82,7 @@ bool SerialDevice::can_write(const OpenFileDescription&, size_t) const
return (get_line_status() & EmptyTransmitterHoldingRegister) != 0;
}
KResultOr<size_t> SerialDevice::write(OpenFileDescription& description, u64, const UserOrKernelBuffer& buffer, size_t size)
ErrorOr<size_t> SerialDevice::write(OpenFileDescription& description, u64, const UserOrKernelBuffer& buffer, size_t size)
{
if (!size)
return 0;

4
Kernel/Devices/SerialDevice.h
View file

@ -22,9 +22,9 @@ public:
// ^CharacterDevice
virtual bool can_read(const OpenFileDescription&, size_t) const override;
virtual KResultOr<size_t> read(OpenFileDescription&, u64, UserOrKernelBuffer&, size_t) override;
virtual ErrorOr<size_t> read(OpenFileDescription&, u64, UserOrKernelBuffer&, size_t) override;
virtual bool can_write(const OpenFileDescription&, size_t) const override;
virtual KResultOr<size_t> write(OpenFileDescription&, u64, const UserOrKernelBuffer&, size_t) override;
virtual ErrorOr<size_t> write(OpenFileDescription&, u64, const UserOrKernelBuffer&, size_t) override;
void put_char(char);

4
Kernel/Devices/ZeroDevice.cpp
View file

@ -33,13 +33,13 @@ bool ZeroDevice::can_read(const OpenFileDescription&, size_t) const
return true;
}
KResultOr<size_t> ZeroDevice::read(OpenFileDescription&, u64, UserOrKernelBuffer& buffer, size_t size)
ErrorOr<size_t> ZeroDevice::read(OpenFileDescription&, u64, UserOrKernelBuffer& buffer, size_t size)
{
TRY(buffer.memset(0, size));
return size;
}
KResultOr<size_t> ZeroDevice::write(OpenFileDescription&, u64, const UserOrKernelBuffer&, size_t size)
ErrorOr<size_t> ZeroDevice::write(OpenFileDescription&, u64, const UserOrKernelBuffer&, size_t size)
{
return size;
}

4
Kernel/Devices/ZeroDevice.h
View file

@ -22,8 +22,8 @@ private:
ZeroDevice();
// ^CharacterDevice
virtual KResultOr<size_t> read(OpenFileDescription&, u64, UserOrKernelBuffer&, size_t) override;
virtual KResultOr<size_t> write(OpenFileDescription&, u64, const UserOrKernelBuffer&, size_t) override;
virtual ErrorOr<size_t> read(OpenFileDescription&, u64, UserOrKernelBuffer&, size_t) override;
virtual ErrorOr<size_t> write(OpenFileDescription&, u64, const UserOrKernelBuffer&, size_t) override;
virtual bool can_read(const OpenFileDescription&, size_t) const override;
virtual bool can_write(const OpenFileDescription&, size_t) const override { return true; }
virtual StringView class_name() const override { return "ZeroDevice"sv; }