mirror of
https://github.com/RGBCube/serenity
synced 2025-10-31 21:02:44 +00:00
e821b349b2
This hack allows self-test mode run-tests-and-shutdown.sh to give TestProcFs a stat(2)-able /proc/self/fd/0. For some reason, when stdin is a SerialDevice, /proc/self/fd/0 will be a symlink to the device as expected, but, calling realpath or stat on /proc/self/fd/0 will error out. realpath will give the string from Device::absolute_path() which would be something like "device:4,64 (SerialDevice)". When VFS is trying to resolve_path so that we can stat the file, it would bail out on this fake-y path. Change the fake path (that doesn't show up when you ls a device, nor when checking the devices tab in SystemMonitor) from the major/minor device number and class_name() to /dev/device_name(). There's probably a very hairy yak standing behind this issue that was only discovered due to the ProcFS rework.
78 lines
1.9 KiB
C++
78 lines
1.9 KiB
C++
/*
|
|
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#include <AK/Singleton.h>
|
|
#include <Kernel/Devices/Device.h>
|
|
#include <Kernel/FileSystem/InodeMetadata.h>
|
|
#include <LibC/errno_numbers.h>
|
|
|
|
namespace Kernel {
|
|
|
|
static AK::Singleton<HashMap<u32, Device*>> s_all_devices;
|
|
|
|
HashMap<u32, Device*>& Device::all_devices()
|
|
{
|
|
return *s_all_devices;
|
|
}
|
|
|
|
void Device::for_each(Function<void(Device&)> callback)
|
|
{
|
|
for (auto& entry : all_devices())
|
|
callback(*entry.value);
|
|
}
|
|
|
|
Device* Device::get_device(unsigned major, unsigned minor)
|
|
{
|
|
auto it = all_devices().find(encoded_device(major, minor));
|
|
if (it == all_devices().end())
|
|
return nullptr;
|
|
return it->value;
|
|
}
|
|
|
|
Device::Device(unsigned major, unsigned minor)
|
|
: m_major(major)
|
|
, m_minor(minor)
|
|
{
|
|
u32 device_id = encoded_device(major, minor);
|
|
auto it = all_devices().find(device_id);
|
|
if (it != all_devices().end()) {
|
|
dbgln("Already registered {},{}: {}", major, minor, it->value->class_name());
|
|
}
|
|
VERIFY(!all_devices().contains(device_id));
|
|
all_devices().set(device_id, this);
|
|
}
|
|
|
|
Device::~Device()
|
|
{
|
|
all_devices().remove(encoded_device(m_major, m_minor));
|
|
}
|
|
|
|
String Device::absolute_path() const
|
|
{
|
|
// FIXME: Don't assume mount point for DevFs
|
|
return String::formatted("/dev/{}", device_name());
|
|
}
|
|
|
|
String Device::absolute_path(const FileDescription&) const
|
|
{
|
|
return absolute_path();
|
|
}
|
|
|
|
void Device::process_next_queued_request(Badge<AsyncDeviceRequest>, const AsyncDeviceRequest& completed_request)
|
|
{
|
|
ScopedSpinLock lock(m_requests_lock);
|
|
VERIFY(!m_requests.is_empty());
|
|
VERIFY(m_requests.first().ptr() == &completed_request);
|
|
m_requests.remove(m_requests.begin());
|
|
if (!m_requests.is_empty()) {
|
|
auto* next_request = m_requests.first().ptr();
|
|
next_request->do_start(move(lock));
|
|
}
|
|
|
|
evaluate_block_conditions();
|
|
}
|
|
|
|
}
|