584 lines
17 KiB
C++
584 lines
17 KiB
C++
/**
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* Genode network session driver,
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* derived from src/VBox/Devices/Network/DrvTAP.cpp.
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*/
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/*
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* Copyright (C) 2014-2017 Genode Labs GmbH
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*
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* This file is distributed under the terms of the GNU General Public License
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* version 2.
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*/
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/*
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* Copyright (C) 2006-2012 Oracle Corporation
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*
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* This file is part of VirtualBox Open Source Edition (OSE), as
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* available from http://www.virtualbox.org. This file is free software;
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* you can redistribute it and/or modify it under the terms of the GNU
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* General Public License (GPL) as published by the Free Software
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* Foundation, in version 2 as it comes in the "COPYING" file of the
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* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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*/
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/*******************************************************************************
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* Header Files *
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*******************************************************************************/
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#define LOG_GROUP LOG_GROUP_DRV_TUN
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#include <base/log.h>
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#include <VBox/log.h>
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#include <VBox/vmm/pdmdrv.h>
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#include <VBox/vmm/pdmnetifs.h>
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#include <VBox/vmm/pdmnetinline.h>
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#include <iprt/mem.h>
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#include <iprt/uuid.h>
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#include "VBoxDD.h"
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#include <nic_session/connection.h>
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#include <nic/packet_allocator.h>
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#include <base/snprintf.h>
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#include <internal/thread_create.h>
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/* VBox Genode specific */
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#include "vmm.h"
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/*******************************************************************************
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* Structures and Typedefs *
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*******************************************************************************/
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struct Nic_client;
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/**
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* Nic driver instance data.
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*
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* @implements PDMINETWORKUP
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*/
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typedef struct DRVNIC
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{
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/** The network interface to Nic session. */
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PDMINETWORKUP INetworkUp;
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/** The config port interface we're representing. */
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PDMINETWORKCONFIG INetworkConfig;
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/** The network interface to VBox driver. */
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PPDMINETWORKDOWN pIAboveNet;
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/** The config port interface we're attached to. */
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PPDMINETWORKCONFIG pIAboveConfig;
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/** Pointer to the driver instance. */
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PPDMDRVINS pDrvIns;
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/** Receiver thread that handles all signals. */
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PPDMTHREAD pThread;
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/** Nic::Session client wrapper. */
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Nic_client *nic_client;
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} DRVNIC, *PDRVNIC;
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/**
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* Return lock to synchronize the destruction of the
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* PDRVNIC, i.e., the Nic_client.
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*/
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static Genode::Lock *destruct_lock()
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{
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static Genode::Lock lock(Genode::Lock::LOCKED);
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return &lock;
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}
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class Nic_client
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{
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private:
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enum {
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PACKET_SIZE = Nic::Packet_allocator::DEFAULT_PACKET_SIZE,
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BUF_SIZE = Nic::Session::QUEUE_SIZE * PACKET_SIZE,
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};
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Nic::Packet_allocator *_tx_block_alloc;
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Nic::Connection _nic;
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enum { NIC_EP_STACK = 32u << 10, };
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Genode::Entrypoint _ep;
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pthread_t _pthread;
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Genode::Signal_handler<Nic_client> _link_state_dispatcher;
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Genode::Signal_handler<Nic_client> _rx_packet_avail_dispatcher;
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Genode::Signal_handler<Nic_client> _rx_ready_to_ack_dispatcher;
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Genode::Signal_handler<Nic_client> _destruct_dispatcher;
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bool _link_up = false;
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/* VM <-> device driver (down) <-> nic_client (up) <-> nic session */
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PPDMINETWORKDOWN _down_rx;
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PPDMINETWORKCONFIG _down_rx_config;
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void _handle_rx_packet_avail()
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{
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while (_nic.rx()->packet_avail() && _nic.rx()->ready_to_ack()) {
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Nic::Packet_descriptor rx_packet = _nic.rx()->get_packet();
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char *rx_content = _nic.rx()->packet_content(rx_packet);
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int rc = _down_rx->pfnWaitReceiveAvail(_down_rx, RT_INDEFINITE_WAIT);
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if (RT_FAILURE(rc))
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continue;
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rc = _down_rx->pfnReceive(_down_rx, rx_content, rx_packet.size());
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AssertRC(rc);
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_nic.rx()->acknowledge_packet(rx_packet);
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}
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}
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void _handle_rx_ready_to_ack() { _handle_rx_packet_avail(); }
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void _handle_link_state()
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{
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_link_up = _nic.link_state();
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_down_rx_config->pfnSetLinkState(_down_rx_config,
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_link_up ? PDMNETWORKLINKSTATE_UP
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: PDMNETWORKLINKSTATE_DOWN);
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}
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void _handle_destruct()
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{
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_nic.link_state_sigh(Genode::Signal_context_capability());
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_nic.rx_channel()->sigh_packet_avail(Genode::Signal_context_capability());
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_nic.rx_channel()->sigh_ready_to_ack(Genode::Signal_context_capability());
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destruct_lock()->unlock();
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}
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void _tx_ack(bool block = false)
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{
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/* check for acknowledgements */
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while (_nic.tx()->ack_avail() || block) {
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Nic::Packet_descriptor acked_packet = _nic.tx()->get_acked_packet();
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_nic.tx()->release_packet(acked_packet);
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block = false;
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}
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}
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Nic::Packet_descriptor _alloc_tx_packet(Genode::size_t len)
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{
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while (true) {
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try {
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Nic::Packet_descriptor packet = _nic.tx()->alloc_packet(len);
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return packet;
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} catch (Nic::Session::Tx::Source::Packet_alloc_failed) {
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_tx_ack(true);
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}
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}
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}
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static Nic::Packet_allocator* _packet_allocator()
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{
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return new (vmm_heap()) Nic::Packet_allocator(&vmm_heap());
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}
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void _handle_pthread_registration()
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{
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Genode::Thread *myself = Genode::Thread::myself();
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if (!myself || Libc::pthread_create(&_pthread, *myself)) {
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Genode::error("network will not work - thread for pthread "
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"registration invalid");
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return;
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}
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}
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Genode::Signal_handler<Nic_client> _pthread_reg_sigh {
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_ep, *this, &Nic_client::_handle_pthread_registration };
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public:
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Nic_client(Genode::Env &env, PDRVNIC drvtap, char const *label)
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:
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_tx_block_alloc(_packet_allocator()),
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_nic(env, _tx_block_alloc, BUF_SIZE, BUF_SIZE, label),
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_ep(env, NIC_EP_STACK, "nic_ep", Genode::Affinity::Location()),
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_link_state_dispatcher(_ep, *this, &Nic_client::_handle_link_state),
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_rx_packet_avail_dispatcher(_ep, *this, &Nic_client::_handle_rx_packet_avail),
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_rx_ready_to_ack_dispatcher(_ep, *this, &Nic_client::_handle_rx_ready_to_ack),
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_destruct_dispatcher(_ep, *this, &Nic_client::_handle_destruct),
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_down_rx(drvtap->pIAboveNet),
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_down_rx_config(drvtap->pIAboveConfig)
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{
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Genode::Signal_transmitter(_pthread_reg_sigh).submit();
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}
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~Nic_client()
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{
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/* XXX Libc::pthread_free(&_pthread); */
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destroy(vmm_heap(), _tx_block_alloc);
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}
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void enable_signals()
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{
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_nic.link_state_sigh(_link_state_dispatcher);
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_nic.rx_channel()->sigh_packet_avail(_rx_packet_avail_dispatcher);
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_nic.rx_channel()->sigh_ready_to_ack(_rx_ready_to_ack_dispatcher);
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/* set initial link-state */
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_handle_link_state();
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}
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Genode::Signal_context_capability dispatcher() { return _destruct_dispatcher; }
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Nic::Mac_address mac_address() { return _nic.mac_address(); }
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int send_packet(void *packet, uint32_t packet_len)
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{
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if (!_link_up) { return VERR_NET_DOWN; }
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Nic::Packet_descriptor tx_packet = _alloc_tx_packet(packet_len);
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char *tx_content = _nic.tx()->packet_content(tx_packet);
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Genode::memcpy(tx_content, packet, packet_len);
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_nic.tx()->submit_packet(tx_packet);
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_tx_ack();
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return VINF_SUCCESS;
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}
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};
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/** Converts a pointer to Nic::INetworkUp to a PRDVNic. */
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#define PDMINETWORKUP_2_DRVNIC(pInterface) ( (PDRVNIC)((uintptr_t)pInterface - RT_OFFSETOF(DRVNIC, INetworkUp)) )
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#define PDMINETWORKCONFIG_2_DRVNIC(pInterface) ( (PDRVNIC)((uintptr_t)pInterface - RT_OFFSETOF(DRVNIC, INetworkConfig)) )
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/*******************************************************************************
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* Internal Functions *
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*******************************************************************************/
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/**
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* @interface_method_impl{PDMINETWORKUP,pfnBeginXmit}
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*/
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static DECLCALLBACK(int) drvNicNetworkUp_BeginXmit(PPDMINETWORKUP pInterface, bool fOnWorkerThread)
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{
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return VINF_SUCCESS;
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}
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/**
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* @interface_method_impl{PDMINETWORKUP,pfnAllocBuf}
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*/
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static DECLCALLBACK(int) drvNicNetworkUp_AllocBuf(PPDMINETWORKUP pInterface, size_t cbMin,
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PCPDMNETWORKGSO pGso, PPPDMSCATTERGATHER ppSgBuf)
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{
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PDRVNIC pThis = PDMINETWORKUP_2_DRVNIC(pInterface);
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/*
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* Allocate a scatter / gather buffer descriptor that is immediately
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* followed by the buffer space of its single segment. The GSO context
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* comes after that again.
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*/
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PPDMSCATTERGATHER pSgBuf = (PPDMSCATTERGATHER)RTMemAlloc(RT_ALIGN_Z(sizeof(*pSgBuf), 16)
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+ RT_ALIGN_Z(cbMin, 16)
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+ (pGso ? RT_ALIGN_Z(sizeof(*pGso), 16) : 0));
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if (!pSgBuf)
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return VERR_NO_MEMORY;
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/*
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* Initialize the S/G buffer and return.
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*/
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pSgBuf->fFlags = PDMSCATTERGATHER_FLAGS_MAGIC | PDMSCATTERGATHER_FLAGS_OWNER_1;
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pSgBuf->cbUsed = 0;
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pSgBuf->cbAvailable = RT_ALIGN_Z(cbMin, 16);
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pSgBuf->pvAllocator = NULL;
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if (!pGso)
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pSgBuf->pvUser = NULL;
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else
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{
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pSgBuf->pvUser = (uint8_t *)(pSgBuf + 1) + pSgBuf->cbAvailable;
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*(PPDMNETWORKGSO)pSgBuf->pvUser = *pGso;
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}
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pSgBuf->cSegs = 1;
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pSgBuf->aSegs[0].cbSeg = pSgBuf->cbAvailable;
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pSgBuf->aSegs[0].pvSeg = pSgBuf + 1;
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*ppSgBuf = pSgBuf;
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return VINF_SUCCESS;
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}
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/**
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* @interface_method_impl{PDMINETWORKUP,pfnFreeBuf}
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*/
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static DECLCALLBACK(int) drvNicNetworkUp_FreeBuf(PPDMINETWORKUP pInterface, PPDMSCATTERGATHER pSgBuf)
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{
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PDRVNIC pThis = PDMINETWORKUP_2_DRVNIC(pInterface);
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if (pSgBuf)
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{
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Assert((pSgBuf->fFlags & PDMSCATTERGATHER_FLAGS_MAGIC_MASK) == PDMSCATTERGATHER_FLAGS_MAGIC);
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pSgBuf->fFlags = 0;
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RTMemFree(pSgBuf);
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}
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return VINF_SUCCESS;
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}
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/**
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* @interface_method_impl{PDMINETWORKUP,pfnSendBuf}
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*/
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static DECLCALLBACK(int) drvNicNetworkUp_SendBuf(PPDMINETWORKUP pInterface, PPDMSCATTERGATHER pSgBuf, bool fOnWorkerThread)
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{
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PDRVNIC pThis = PDMINETWORKUP_2_DRVNIC(pInterface);
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Nic_client *nic_client = pThis->nic_client;
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AssertPtr(pSgBuf);
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Assert((pSgBuf->fFlags & PDMSCATTERGATHER_FLAGS_MAGIC_MASK) == PDMSCATTERGATHER_FLAGS_MAGIC);
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/* Set an FTM checkpoint as this operation changes the state permanently. */
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PDMDrvHlpFTSetCheckpoint(pThis->pDrvIns, FTMCHECKPOINTTYPE_NETWORK);
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int rc;
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if (!pSgBuf->pvUser)
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{
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Log2(("drvNicSend: pSgBuf->aSegs[0].pvSeg=%p pSgBuf->cbUsed=%#x\n"
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"%.*Rhxd\n", pSgBuf->aSegs[0].pvSeg, pSgBuf->cbUsed, pSgBuf->cbUsed,
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pSgBuf->aSegs[0].pvSeg));
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rc = nic_client->send_packet(pSgBuf->aSegs[0].pvSeg, pSgBuf->cbUsed);
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}
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else
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{
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uint8_t abHdrScratch[256];
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uint8_t const *pbFrame = (uint8_t const *)pSgBuf->aSegs[0].pvSeg;
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PCPDMNETWORKGSO pGso = (PCPDMNETWORKGSO)pSgBuf->pvUser;
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uint32_t const cSegs = PDMNetGsoCalcSegmentCount(pGso, pSgBuf->cbUsed);
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Assert(cSegs > 1);
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rc = VINF_SUCCESS;
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for (size_t iSeg = 0; iSeg < cSegs; iSeg++)
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{
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uint32_t cbSegFrame;
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void *pvSegFrame = PDMNetGsoCarveSegmentQD(pGso, (uint8_t *)pbFrame, pSgBuf->cbUsed,
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abHdrScratch, iSeg, cSegs, &cbSegFrame);
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rc = nic_client->send_packet(pvSegFrame, cbSegFrame);
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if (RT_FAILURE(rc))
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break;
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}
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}
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pSgBuf->fFlags = 0;
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RTMemFree(pSgBuf);
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AssertRC(rc);
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if (RT_FAILURE(rc))
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rc = rc == VERR_NO_MEMORY ? VERR_NET_NO_BUFFER_SPACE : VERR_NET_DOWN;
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return rc;
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}
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/**
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* @interface_method_impl{PDMINETWORKUP,pfnEndXmit}
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*/
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static DECLCALLBACK(void) drvNicNetworkUp_EndXmit(PPDMINETWORKUP pInterface)
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{
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PDRVNIC pThis = PDMINETWORKUP_2_DRVNIC(pInterface);
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}
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/**
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* @interface_method_impl{PDMINETWORKUP,pfnSetPromiscuousMode}
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*/
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static DECLCALLBACK(void) drvNicNetworkUp_SetPromiscuousMode(PPDMINETWORKUP pInterface, bool fPromiscuous)
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{
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LogFlow(("drvNicNetworkUp_SetPromiscuousMode: fPromiscuous=%d\n", fPromiscuous));
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/* nothing to do */
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}
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/**
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* Notification on link status changes.
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*/
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static DECLCALLBACK(void) drvNicNetworkUp_NotifyLinkChanged(PPDMINETWORKUP pInterface, PDMNETWORKLINKSTATE enmLinkState)
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{
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LogFlow(("drvNicNetworkUp_NotifyLinkChanged: enmLinkState=%d\n", enmLinkState));
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/*
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* At this point we could stop waiting for signals etc. but for now we just do nothing.
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*/
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}
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static DECLCALLBACK(int) drvGetMac(PPDMINETWORKCONFIG pInterface, PRTMAC pMac)
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{
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PDRVNIC pThis = PDMINETWORKCONFIG_2_DRVNIC(pInterface);
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Nic_client *nic_client = pThis->nic_client;
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static_assert (sizeof(*pMac) == sizeof(nic_client->mac_address()),
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"should be equal");
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memcpy(pMac, nic_client->mac_address().addr, sizeof(*pMac));
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return VINF_SUCCESS;
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}
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/* -=-=-=-=- PDMIBASE -=-=-=-=- */
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/**
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* @interface_method_impl{PDMIBASE,pfnQueryInterface}
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*/
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static DECLCALLBACK(void *) drvNicQueryInterface(PPDMIBASE pInterface, const char *pszIID)
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{
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PPDMDRVINS pDrvIns = PDMIBASE_2_PDMDRV(pInterface);
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PDRVNIC pThis = PDMINS_2_DATA(pDrvIns, PDRVNIC);
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PDMIBASE_RETURN_INTERFACE(pszIID, PDMIBASE, &pDrvIns->IBase);
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PDMIBASE_RETURN_INTERFACE(pszIID, PDMINETWORKUP, &pThis->INetworkUp);
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PDMIBASE_RETURN_INTERFACE(pszIID, PDMINETWORKCONFIG, &pThis->INetworkConfig);
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return NULL;
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}
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/* -=-=-=-=- PDMDRVREG -=-=-=-=- */
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static DECLCALLBACK(void) drvNicDestruct(PPDMDRVINS pDrvIns)
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{
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PDRVNIC pThis = PDMINS_2_DATA(pDrvIns, PDRVNIC);
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Nic_client *nic_client = pThis->nic_client;
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if (!nic_client)
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Genode::error("nic_client not valid at destruction time");
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if (nic_client)
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Genode::Signal_transmitter(nic_client->dispatcher()).submit();
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/* wait until the recv thread exits */
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destruct_lock()->lock();
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if (nic_client)
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destroy(vmm_heap(), nic_client);
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}
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|
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/**
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* Construct a Nic network transport driver instance.
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*
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* @copydoc FNPDMDRVCONSTRUCT
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*/
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static DECLCALLBACK(int) drvNicConstruct(PPDMDRVINS pDrvIns, PCFGMNODE pCfg, uint32_t fFlags)
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{
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PDRVNIC pThis = PDMINS_2_DATA(pDrvIns, PDRVNIC);
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PDMDRV_CHECK_VERSIONS_RETURN(pDrvIns);
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int rc;
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|
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/*
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* Init the static parts.
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*/
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pThis->pDrvIns = pDrvIns;
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/* IBase */
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pDrvIns->IBase.pfnQueryInterface = drvNicQueryInterface;
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/* INetwork */
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pThis->INetworkUp.pfnBeginXmit = drvNicNetworkUp_BeginXmit;
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pThis->INetworkUp.pfnAllocBuf = drvNicNetworkUp_AllocBuf;
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pThis->INetworkUp.pfnFreeBuf = drvNicNetworkUp_FreeBuf;
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pThis->INetworkUp.pfnSendBuf = drvNicNetworkUp_SendBuf;
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pThis->INetworkUp.pfnEndXmit = drvNicNetworkUp_EndXmit;
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pThis->INetworkUp.pfnSetPromiscuousMode = drvNicNetworkUp_SetPromiscuousMode;
|
|
pThis->INetworkUp.pfnNotifyLinkChanged = drvNicNetworkUp_NotifyLinkChanged;
|
|
/* INetworkConfig - used on Genode to request Mac address of nic_session */
|
|
pThis->INetworkConfig.pfnGetMac = drvGetMac;
|
|
|
|
/*
|
|
* Check that no-one is attached to us.
|
|
*/
|
|
AssertMsgReturn(PDMDrvHlpNoAttach(pDrvIns) == VERR_PDM_NO_ATTACHED_DRIVER,
|
|
("Configuration error: Not possible to attach anything to"
|
|
" this driver!\n"), VERR_PDM_DRVINS_NO_ATTACH);
|
|
|
|
/*
|
|
* Query the above network port interface.
|
|
*/
|
|
pThis->pIAboveNet = PDMIBASE_QUERY_INTERFACE(pDrvIns->pUpBase, PDMINETWORKDOWN);
|
|
if (!pThis->pIAboveNet)
|
|
return PDMDRV_SET_ERROR(pDrvIns, VERR_PDM_MISSING_INTERFACE_ABOVE,
|
|
N_("Configuration error: The above device/driver"
|
|
" didn't export the network port interface"));
|
|
pThis->pIAboveConfig = PDMIBASE_QUERY_INTERFACE(pDrvIns->pUpBase, PDMINETWORKCONFIG);
|
|
if (!pThis->pIAboveConfig)
|
|
return PDMDRV_SET_ERROR(pDrvIns, VERR_PDM_MISSING_INTERFACE_ABOVE,
|
|
N_("Configuration error: the above device/driver"
|
|
" didn't export the network config interface!\n"));
|
|
|
|
char label[8];
|
|
uint64_t slot;
|
|
rc = CFGMR3QueryInteger(pCfg, "Slot", &slot);
|
|
if (RT_FAILURE(rc))
|
|
return PDMDRV_SET_ERROR(pDrvIns, rc,
|
|
N_("Configuration error: Failed to retrieve the network interface slot"));
|
|
Genode::snprintf(label, sizeof(label), "%d", slot);
|
|
|
|
/*
|
|
* Setup Genode nic_session connection
|
|
*/
|
|
try {
|
|
pThis->nic_client = new (vmm_heap()) Nic_client(genode_env(), pThis, label);
|
|
} catch (...) {
|
|
return VERR_HOSTIF_INIT_FAILED;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static DECLCALLBACK(void) drvNicPowerOn(PPDMDRVINS pDrvIns)
|
|
{
|
|
PDRVNIC pThis = PDMINS_2_DATA(pDrvIns, PDRVNIC);
|
|
|
|
if (pThis && pThis->nic_client)
|
|
pThis->nic_client->enable_signals();
|
|
}
|
|
|
|
/**
|
|
* Nic network transport driver registration record.
|
|
*/
|
|
const PDMDRVREG g_DrvHostInterface =
|
|
{
|
|
/* u32Version */
|
|
PDM_DRVREG_VERSION,
|
|
/* szName */
|
|
"HostInterface",
|
|
/* szRCMod */
|
|
"",
|
|
/* szR0Mod */
|
|
"",
|
|
/* pszDescription */
|
|
"Genode Network Session Driver",
|
|
/* fFlags */
|
|
PDM_DRVREG_FLAGS_HOST_BITS_DEFAULT,
|
|
/* fClass. */
|
|
PDM_DRVREG_CLASS_NETWORK,
|
|
/* cMaxInstances */
|
|
~0U,
|
|
/* cbInstance */
|
|
sizeof(DRVNIC),
|
|
/* pfnConstruct */
|
|
drvNicConstruct,
|
|
/* pfnDestruct */
|
|
drvNicDestruct,
|
|
/* pfnRelocate */
|
|
NULL,
|
|
/* pfnIOCtl */
|
|
NULL,
|
|
drvNicPowerOn,
|
|
/* pfnReset */
|
|
NULL,
|
|
/* pfnSuspend */
|
|
NULL,
|
|
/* pfnResume */
|
|
NULL,
|
|
/* pfnAttach */
|
|
NULL,
|
|
/* pfnDetach */
|
|
NULL,
|
|
/* pfnPowerOff */
|
|
NULL,
|
|
/* pfnSoftReset */
|
|
NULL,
|
|
/* u32EndVersion */
|
|
PDM_DRVREG_VERSION
|
|
};
|