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Kernel: Make Device request creation return KResultOr

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This allows us to propagate errors in a bunch of new places.
This commit is contained in:
Andreas Kling 2021-09-07 16:40:54 +02:00
parent a01b19c878
commit 9669bf29f6
4 changed files with 24 additions and 11 deletions
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14
Kernel/Devices/BlockDevice.cpp
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@ -30,7 +30,12 @@ BlockDevice::~BlockDevice()
bool BlockDevice::read_block(u64 index, UserOrKernelBuffer& buffer)
{
auto read_request = make_request<AsyncBlockDeviceRequest>(AsyncBlockDeviceRequest::Read, index, 1, buffer, 512);
auto read_request_or_error = try_make_request<AsyncBlockDeviceRequest>(AsyncBlockDeviceRequest::Read, index, 1, buffer, 512);
if (read_request_or_error.is_error()) {
dbgln("BlockDevice::read_block({}): try_make_request failed", index);
return false;
}
auto read_request = read_request_or_error.release_value();
switch (read_request->wait().request_result()) {
case AsyncDeviceRequest::Success:
return true;
@ -51,7 +56,12 @@ bool BlockDevice::read_block(u64 index, UserOrKernelBuffer& buffer)
bool BlockDevice::write_block(u64 index, const UserOrKernelBuffer& buffer)
{
auto write_request = make_request<AsyncBlockDeviceRequest>(AsyncBlockDeviceRequest::Write, index, 1, buffer, 512);
auto write_request_or_error = try_make_request<AsyncBlockDeviceRequest>(AsyncBlockDeviceRequest::Write, index, 1, buffer, 512);
if (write_request_or_error.is_error()) {
dbgln("BlockDevice::write_block({}): try_make_request failed", index);
return false;
}
auto write_request = write_request_or_error.release_value();
switch (write_request->wait().request_result()) {
case AsyncDeviceRequest::Success:
return true;

4
Kernel/Devices/Device.h
View file

@ -48,9 +48,9 @@ public:
void process_next_queued_request(Badge<AsyncDeviceRequest>, const AsyncDeviceRequest&);
template<typename AsyncRequestType, typename... Args>
NonnullRefPtr<AsyncRequestType> make_request(Args&&... args)
KResultOr<NonnullRefPtr<AsyncRequestType>> try_make_request(Args&&... args)
{
auto request = adopt_ref(*new AsyncRequestType(*this, forward<Args>(args)...));
auto request = TRY(adopt_nonnull_ref_or_enomem(new (nothrow) AsyncRequestType(*this, forward<Args>(args)...)));
SpinlockLocker lock(m_requests_lock);
bool was_empty = m_requests.is_empty();
m_requests.append(request);