2023-03-18 09:10:33 +01:00
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#include "fs/devices/DeviceRegistry.h"
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#include "Log.h"
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2023-05-17 19:40:37 +02:00
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#include "fs/VFS.h"
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2023-03-18 09:10:33 +01:00
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#include "fs/devices/ConsoleDevice.h"
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2023-04-21 18:18:15 +02:00
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#include "fs/devices/FramebufferDevice.h"
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2023-03-18 09:10:33 +01:00
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#include "fs/devices/NullDevice.h"
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2023-03-30 21:19:16 +02:00
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#include "fs/devices/ZeroDevice.h"
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2023-05-17 19:40:37 +02:00
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#include "fs/tmpfs/FileSystem.h"
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#include "thread/Thread.h"
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2023-03-18 09:10:33 +01:00
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#include <luna/Vector.h>
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struct DeviceDescriptor
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{
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SharedPtr<Device> device;
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2023-03-18 09:10:33 +01:00
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u32 major;
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u32 minor;
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const char* name;
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mode_t mode;
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2023-03-18 09:10:33 +01:00
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};
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Vector<DeviceDescriptor> g_available_devices = {};
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2023-05-17 19:40:37 +02:00
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SharedPtr<VFS::FileSystem> g_device_fs;
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2023-03-18 09:10:33 +01:00
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namespace DeviceRegistry
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{
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Result<SharedPtr<Device>> fetch_special_device(u32 major, u32 minor)
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{
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for (const auto& descriptor : g_available_devices)
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{
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if (descriptor.major == major && descriptor.minor == minor) return descriptor.device;
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2023-03-18 09:10:33 +01:00
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}
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return err(ENODEV);
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}
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2023-05-17 19:40:37 +02:00
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Result<void> register_special_device(u32 major, u32 minor, SharedPtr<Device> device, const char* name, mode_t mode)
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{
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for (const auto& descriptor : g_available_devices)
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{
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if (descriptor.major == major && descriptor.minor == minor) return err(EEXIST);
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}
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2023-05-17 19:40:37 +02:00
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kdbgln("DeviceRegistry: registered new device type %u:%u at path /dev/%s", major, minor, name);
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auto desc = DeviceDescriptor { .device = device, .major = major, .minor = minor, .name = name, .mode = mode };
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TRY(g_available_devices.try_append(desc));
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2023-05-17 19:40:37 +02:00
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TRY(create_special_device_inode(desc));
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return {};
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}
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Result<void> create_special_device_inode(DeviceDescriptor& descriptor)
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{
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auto inode = TRY(g_device_fs->create_device_inode(descriptor.major, descriptor.minor));
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inode->chmod(descriptor.mode);
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TRY(g_device_fs->root_inode()->add_entry(inode, descriptor.name));
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return {};
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}
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Result<void> init()
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{
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auto device_fs = TRY(TmpFS::FileSystem::create());
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TRY(VFS::mount("/dev", device_fs, Credentials {}));
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g_device_fs = device_fs;
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2023-05-09 18:31:27 +02:00
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NullDevice::create();
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ZeroDevice::create();
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ConsoleDevice::create();
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FramebufferDevice::create();
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2023-03-18 09:10:33 +01:00
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return {};
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}
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}
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