9d67f9fc8e
This patch removes old 'Allocator_guard' utility and replaces its use with the modern 'Constrained_ram_allocator'. The adjustment of core in this respect has the side effect of a more accurate capability accounting in core's CPU, TRACE, and RM services. In particular, the dataspace capabilities needed for core-internal allocations via the 'Sliced_heap' are accounted to the client now. The same goes for nitpicker and nic_dump as other former users of the allocator guard. Hence, the patch also touches code at the client and server sides related to these services. The only remaining user of the 'Allocator_guard' is the Intel GPU driver. As the adaptation of this component would be too invasive without testing, this patch leaves this component unchanged by keeping a copy of the 'allocator_guard.h' locally at the component. Fixes #3750
158 lines
4.7 KiB
C++
158 lines
4.7 KiB
C++
/*
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* \brief Downlink interface in form of a NIC session component
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* \author Martin Stein
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* \date 2017-03-08
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*/
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/*
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* Copyright (C) 2016-2017 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU Affero General Public License version 3.
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*/
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/* Genode includes */
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#include <os/session_policy.h>
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/* local includes */
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#include <component.h>
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#include <uplink.h>
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using namespace Net;
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using namespace Genode;
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/**************************
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** Communication_buffer **
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**************************/
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Communication_buffer::Communication_buffer(Ram_allocator &ram,
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Genode::size_t const size)
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:
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Ram_dataspace_capability(ram.alloc(size)), _ram(ram)
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{ }
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/****************************
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** Session_component_base **
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****************************/
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Session_component_base::
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Session_component_base(Ram_allocator &ram,
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Region_map &local_rm,
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Ram_quota const ram_quota,
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Cap_quota const cap_quota,
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size_t const tx_buf_size,
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size_t const rx_buf_size)
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:
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_ram_quota_guard(ram_quota),
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_cap_quota_guard(cap_quota),
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_ram(ram, _ram_quota_guard, _cap_quota_guard),
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_alloc(_ram, local_rm),
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_range_alloc(&_alloc),
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_tx_buf(ram, tx_buf_size),
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_rx_buf(ram, rx_buf_size)
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{ }
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/***********************
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** Session_component **
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***********************/
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Net::Session_component::Session_component(Ram_quota const ram_quota,
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Cap_quota const cap_quota,
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size_t const tx_buf_size,
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size_t const rx_buf_size,
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Xml_node const config,
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Timer::Connection &timer,
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Duration &curr_time,
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Env &env)
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:
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Session_component_base(env.ram(), env.rm(), ram_quota, cap_quota,
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tx_buf_size, rx_buf_size),
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Session_rpc_object(env.rm(), _tx_buf, _rx_buf, &_range_alloc,
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env.ep().rpc_ep()),
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Interface(env.ep(), config.attribute_value("downlink", Interface_label()),
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timer, curr_time, config.attribute_value("time", false),
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Session_component_base::_alloc, config),
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_uplink(env, config, timer, curr_time, Session_component_base::_alloc),
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_link_state_handler(env.ep(), *this, &Session_component::_handle_link_state)
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{
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_tx.sigh_ready_to_ack(_sink_ack);
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_tx.sigh_packet_avail(_sink_submit);
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_rx.sigh_ack_avail(_source_ack);
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_rx.sigh_ready_to_submit(_source_submit);
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Interface::remote(_uplink);
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_uplink.Interface::remote(*this);
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_uplink.link_state_sigh(_link_state_handler);
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_print_state();
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}
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void Session_component::_print_state()
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{
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log("\033[33m(new state)\033[0m \033[32mMAC address\033[0m ", mac_address(),
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" \033[32mlink state\033[0m ", link_state());
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}
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void Session_component::_handle_link_state()
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{
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_print_state();
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if (!_link_state_sigh.valid()) {
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warning("failed to forward signal");
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return;
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}
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Signal_transmitter(_link_state_sigh).submit();
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}
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/**********
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** Root **
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**********/
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Net::Root::Root(Env &env,
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Allocator &alloc,
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Xml_node config,
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Timer::Connection &timer,
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Duration &curr_time)
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:
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Root_component<Session_component, Genode::Single_client>(&env.ep().rpc_ep(),
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&alloc),
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_env(env), _config(config), _timer(timer), _curr_time(curr_time)
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{ }
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Session_component *Net::Root::_create_session(char const *args)
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{
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try {
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Ram_quota const ram_quota = ram_quota_from_args(args);
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Cap_quota const cap_quota = cap_quota_from_args(args);
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size_t const tx_buf_size =
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Arg_string::find_arg(args, "tx_buf_size").ulong_value(0);
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size_t const rx_buf_size =
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Arg_string::find_arg(args, "rx_buf_size").ulong_value(0);
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size_t const session_size =
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max((size_t)4096, sizeof(Session_component));
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if (ram_quota.value < session_size) {
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throw Insufficient_ram_quota(); }
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if (tx_buf_size > ram_quota.value - session_size ||
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rx_buf_size > ram_quota.value - session_size ||
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tx_buf_size + rx_buf_size > ram_quota.value - session_size)
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{
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error("insufficient 'ram_quota' for session creation");
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throw Insufficient_ram_quota();
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}
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return new (md_alloc())
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Session_component(Ram_quota{ram_quota.value - session_size},
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cap_quota, tx_buf_size, rx_buf_size, _config, _timer,
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_curr_time, _env);
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}
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catch (...) { throw Service_denied(); }
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}
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