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https://github.com/RGBCube/serenity
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21b6d84ff0
These methods are no longer needed because SystemServer is able to populate the DevFS on its own. Device absolute_path no longer assume a path to the /dev location, because it really should not assume any path to a Device node. Because StorageManagement still needs to know the storage name, we declare a virtual method only for StorageDevices to override, but this technique should really be removed later on.
80 lines
2.1 KiB
C++
80 lines
2.1 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/Singleton.h>
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#include <Kernel/Devices/Device.h>
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#include <Kernel/FileSystem/InodeMetadata.h>
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namespace Kernel {
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static Singleton<HashMap<u32, Device*>> s_all_devices;
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HashMap<u32, Device*>& Device::all_devices()
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{
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return *s_all_devices;
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}
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void Device::for_each(Function<void(Device&)> callback)
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{
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for (auto& entry : all_devices())
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callback(*entry.value);
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}
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Device* Device::get_device(unsigned major, unsigned minor)
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{
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auto it = all_devices().find(encoded_device(major, minor));
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if (it == all_devices().end())
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return nullptr;
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return it->value;
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}
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Device::Device(unsigned major, unsigned minor)
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: m_major(major)
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, m_minor(minor)
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{
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u32 device_id = encoded_device(major, minor);
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auto it = all_devices().find(device_id);
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if (it != all_devices().end()) {
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dbgln("Already registered {},{}: {}", major, minor, it->value->class_name());
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}
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VERIFY(!all_devices().contains(device_id));
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all_devices().set(device_id, this);
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}
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Device::~Device()
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{
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all_devices().remove(encoded_device(m_major, m_minor));
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}
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String Device::absolute_path() const
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{
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// FIXME: I assume we can't really provide a well known path in the kernel
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// because this is a violation of abstraction layers between userland and the
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// kernel, but maybe the whole name of "absolute_path" is just wrong as this
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// is really not an "absolute_path".
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return String::formatted("device:{},{}", major(), minor());
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}
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String Device::absolute_path(const OpenFileDescription&) const
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{
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return absolute_path();
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}
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void Device::process_next_queued_request(Badge<AsyncDeviceRequest>, const AsyncDeviceRequest& completed_request)
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{
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SpinlockLocker lock(m_requests_lock);
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VERIFY(!m_requests.is_empty());
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VERIFY(m_requests.first().ptr() == &completed_request);
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m_requests.remove(m_requests.begin());
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if (!m_requests.is_empty()) {
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auto* next_request = m_requests.first().ptr();
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next_request->do_start(move(lock));
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}
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evaluate_block_conditions();
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}
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}
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