155 lines
3.7 KiB
C++
155 lines
3.7 KiB
C++
/*
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* \brief Server that aggregates reports and exposes them as ROM modules
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* \author Norman Feske
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* \date 2014-01-11
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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 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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#ifndef _INCLUDE__REPORT_ROM__REPORT_SERVICE_H_
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#define _INCLUDE__REPORT_ROM__REPORT_SERVICE_H_
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/* Genode includes */
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#include <util/arg_string.h>
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#include <report_session/report_session.h>
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#include <root/component.h>
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#include <util/print_lines.h>
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#include <report_rom/rom_registry.h>
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#include <base/log.h>
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namespace Report {
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struct Session_component;
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struct Root;
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}
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struct Report::Session_component : Genode::Rpc_object<Session>, Rom::Writer
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{
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private:
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Rom::Registry_for_writer &_registry;
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Genode::Session_label const _label;
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Genode::Attached_ram_dataspace _ds;
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Rom::Module &_module;
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bool &_verbose;
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Rom::Module &_create_module(Rom::Module::Name const &name)
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{
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try { return _registry.lookup(*this, name); }
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catch (...) { throw Genode::Service_denied(); }
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}
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static void _log_lines(char const *string, size_t len)
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{
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Genode::print_lines<200>(string, len,
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[&] (char const *line)
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{ Genode::log(" ", line); });
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}
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public:
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Session_component(Genode::Env &env,
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Genode::Session_label const &label, size_t buffer_size,
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Rom::Registry_for_writer ®istry, bool &verbose)
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:
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_registry(registry), _label(label),
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_ds(env.ram(), env.rm(), buffer_size),
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_module(_create_module(label.string())),
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_verbose(verbose)
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{ }
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~Session_component()
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{
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_registry.release(*this, _module);
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}
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/**
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* Rom::Writer interface
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*/
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Genode::Session_label label() const override { return _label; }
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Dataspace_capability dataspace() override { return _ds.cap(); }
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void submit(size_t length) override
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{
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length = Genode::min(length, _ds.size());
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if (_verbose) {
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Genode::log("report '", _module.name(), "'");
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_log_lines(_ds.local_addr<char>(), length);
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}
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_module.write_content(*this, _ds.local_addr<char>(), length);
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}
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void response_sigh(Genode::Signal_context_capability) override { }
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size_t obtain_response() override { return 0; }
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};
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struct Report::Root : Genode::Root_component<Session_component>
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{
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private:
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Genode::Env &_env;
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Rom::Registry_for_writer &_rom_registry;
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bool &_verbose;
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protected:
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Session_component *_create_session(const char *args) override
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{
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using namespace Genode;
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Session_label const label = label_from_args(args);
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size_t const ram_quota =
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Arg_string::find_arg(args, "ram_quota").aligned_size();
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/* read report buffer size from session arguments */
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size_t const buffer_size =
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Arg_string::find_arg(args, "buffer_size").aligned_size();
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size_t const session_size =
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max(sizeof(Session_component), 4096U) + buffer_size;
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if (ram_quota < session_size) {
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Genode::error("insufficient ram donation from ", label.string());
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throw Insufficient_ram_quota();
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}
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if (buffer_size == 0) {
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Genode::error("zero-length report requested by ", label.string());
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throw Service_denied();
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}
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return new (md_alloc())
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Session_component(_env, label, buffer_size,
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_rom_registry, _verbose);
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}
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public:
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Root(Genode::Env &env,
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Genode::Allocator &md_alloc,
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Rom::Registry_for_writer &rom_registry,
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bool &verbose)
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:
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Genode::Root_component<Session_component>(&env.ep().rpc_ep(), &md_alloc),
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_env(env), _rom_registry(rom_registry), _verbose(verbose)
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{ }
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};
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#endif /* _INCLUDE__REPORT_ROM__REPORT_SERVICE_H_ */
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