mirror of
https://github.com/genodelabs/genode.git
synced 2025-06-13 04:38:20 +00:00
Adapt high-level components to new parent API
This patch adjusts the various users of the 'Child' API to the changes on the account of the new non-blocking parent interface. It also removes the use of the no-longer-available 'Connection::KEEP_OPEN' feature. With the adjustment, we took the opportunity to redesign several components to fit the non-blocking execution model much better, in particular the demo applications. Issue #2120
This commit is contained in:
Norman Feske
committed by
Christian Helmuth
Christian Helmuth
parent
8bafb9d41b
commit
b44f0554bd
@ -26,65 +26,138 @@
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#include <cap_session/connection.h>
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#include <timer_session/timer_session.h>
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#include <pd_session/client.h>
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#include <init/child.h>
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class Launchpad_child_policy : public Genode::Child_policy,
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public Genode::Client
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class Launchpad;
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class Launchpad_child : public Genode::Child_policy,
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public Genode::List<Launchpad_child>::Element,
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public Genode::Child_service::Wakeup
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{
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public:
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typedef Genode::Child_policy::Name Name;
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typedef Genode::Registered<Genode::Child_service> Child_service;
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typedef Genode::Registered<Genode::Parent_service> Parent_service;
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typedef Genode::Registry<Child_service> Child_services;
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typedef Genode::Registry<Parent_service> Parent_services;
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private:
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typedef Genode::String<64> Name;
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Name const _name;
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Genode::Server *_server;
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Genode::Service_registry *_parent_services;
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Genode::Service_registry *_child_services;
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Genode::Dataspace_capability _config_ds;
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Genode::Rpc_entrypoint *_parent_entrypoint;
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Init::Child_policy_enforce_labeling _labeling_policy;
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Init::Child_policy_provide_rom_file _config_policy;
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Init::Child_policy_provide_rom_file _binary_policy;
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Genode::Env &_env;
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Genode::Ram_session_capability _ref_ram_cap;
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Genode::Ram_session_client _ref_ram { _ref_ram_cap };
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Genode::size_t const _ram_quota;
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Parent_services &_parent_services;
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Child_services &_child_services;
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Genode::Dataspace_capability _config_ds;
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Genode::Session_requester _session_requester;
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Init::Child_policy_enforce_labeling _labeling_policy { _name.string() };
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Init::Child_policy_provide_rom_file _config_policy;
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Genode::Child _child;
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/**
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* Child_service::Wakeup callback
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*/
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void wakeup_child_service() override
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{
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_session_requester.trigger_update();
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}
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template <typename T>
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static Genode::Service *_find_service(Genode::Registry<T> &services,
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Genode::Service::Name const &name)
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{
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Genode::Service *service = nullptr;
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services.for_each([&] (T &s) {
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if (!service && (s.name() == name))
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service = &s; });
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return service;
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}
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public:
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Launchpad_child_policy(const char *name,
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Genode::Server *server,
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Genode::Service_registry *parent_services,
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Genode::Service_registry *child_services,
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Genode::Dataspace_capability config_ds,
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Genode::Dataspace_capability binary_ds,
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Genode::Rpc_entrypoint *parent_entrypoint)
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Launchpad_child(Genode::Env &env,
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Genode::Session_label const &label,
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Name const &elf_name,
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Genode::size_t ram_quota,
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Parent_services &parent_services,
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Child_services &child_services,
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Genode::Dataspace_capability config_ds)
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:
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_name(name),
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_server(server),
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_name(label),
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_env(env), _ref_ram_cap(env.ram_session_cap()), _ram_quota(ram_quota),
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_parent_services(parent_services),
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_child_services(child_services),
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_config_ds(config_ds),
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_parent_entrypoint(parent_entrypoint),
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_labeling_policy(_name.string()),
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_config_policy("config", config_ds, _parent_entrypoint),
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_binary_policy("binary", binary_ds, _parent_entrypoint)
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_session_requester(env.ep().rpc_ep(), _env.ram(), _env.rm()),
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_config_policy("config", config_ds, &_env.ep().rpc_ep()),
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_child(_env.rm(), _env.ep().rpc_ep(), *this)
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{ }
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const char *name() const { return _name.string(); }
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Genode::Service *resolve_session_request(const char *service_name,
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const char *args)
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~Launchpad_child()
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{
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Genode::Service *service;
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using namespace Genode;
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/* unregister services */
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_child_services.for_each(
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[&] (Child_service &service) {
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if (service.has_id_space(_session_requester.id_space()))
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Genode::destroy(_child.heap(), &service); });
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}
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Genode::Allocator &heap() { return _child.heap(); }
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/****************************
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** Child_policy interface **
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****************************/
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Name name() const override { return _name; }
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Genode::Ram_session &ref_ram() override { return _ref_ram; }
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Genode::Ram_session_capability ref_ram_cap() const override { return _ref_ram_cap; }
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void init(Genode::Ram_session &session,
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Genode::Ram_session_capability cap) override
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{
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session.ref_account(_ref_ram_cap);
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_ref_ram.transfer_quota(cap, _ram_quota);
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}
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Genode::Id_space<Genode::Parent::Server> &server_id_space() override {
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return _session_requester.id_space(); }
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Genode::Service &resolve_session_request(Genode::Service::Name const &service_name,
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Genode::Session_state::Args const &args) override
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{
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Genode::Service *service = nullptr;
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/* check for config file request */
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if ((service = _config_policy.resolve_session_request(service_name, args)))
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return service;
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if ((service = _config_policy
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.resolve_session_request(service_name.string(), args.string())))
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return *service;
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/* check for binary file request */
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if ((service = _binary_policy.resolve_session_request(service_name, args)))
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return service;
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/* check for "session_requests" ROM request */
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Genode::Session_label const label(Genode::label_from_args(args.string()));
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if (service_name == Genode::Rom_session::service_name()
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&& label.last_element() == Genode::Session_requester::rom_name())
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return _session_requester.service();
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/* if service is provided by one of our children, use it */
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if ((service = _child_services->find(service_name)))
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return service;
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if ((service = _find_service(_child_services, service_name)))
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return *service;
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/*
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* Handle special case of the demo scenario when the user uses
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@ -100,130 +173,33 @@ class Launchpad_child_policy : public Genode::Child_policy,
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* interacted, however, would block at the parent interface
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* until this condition gets satisfied.
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*/
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if (Genode::strcmp(service_name, "Input") != 0
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&& Genode::strcmp(service_name, "Framebuffer") != 0
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&& (service = _parent_services->find(service_name)))
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return service;
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if (service_name != "Input"
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&& service_name != "Framebuffer"
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&& ((service = _find_service(_parent_services, service_name))))
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return *service;
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/* wait for the service to become available */
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Genode::Client client;
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return _child_services->wait_for_service(service_name,
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&client, name());
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Genode::warning(name(), ": service ", service_name, " not available");
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throw Genode::Parent::Service_denied();
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}
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void filter_session_args(const char *service, char *args,
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Genode::size_t args_len)
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void filter_session_args(Genode::Service::Name const &service,
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char *args, Genode::size_t args_len) override
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{
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_labeling_policy.filter_session_args(service, args, args_len);
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_labeling_policy.filter_session_args(service.string(), args, args_len);
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}
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bool announce_service(const char *service_name,
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Genode::Root_capability root,
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Genode::Allocator *alloc,
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Genode::Server * /*server*/)
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void announce_service(Genode::Service::Name const &service_name) override
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{
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if (_child_services->find(service_name)) {
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PWRN("%s: service %s is already registered",
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name(), service_name);
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return false;
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if (_find_service(_child_services, service_name)) {
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Genode::warning(name(), ": service ", service_name, " is already registered");
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return;
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}
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/* XXX remove potential race between checking for and inserting service */
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_child_services->insert(new (alloc)
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Genode::Child_service(service_name, root, _server));
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Genode::printf("%s registered service %s\n", name(), service_name);
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return true;
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new (_child.heap())
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Child_service(_child_services, _session_requester.id_space(),
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_child.session_factory(), service_name,
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_child.ram_session_cap(), *this);
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}
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void unregister_services()
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{
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Genode::Service *rs;
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while ((rs = _child_services->find_by_server(_server)))
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_child_services->remove(rs);
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}
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};
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class Launchpad;
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class Launchpad_child : public Genode::List<Launchpad_child>::Element
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{
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private:
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static Genode::Dataspace_capability _ldso_ds();
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Launchpad *_launchpad;
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/*
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* Entry point used for serving the parent interface and the
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* locally provided ROM sessions for the 'config' and 'binary'
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* files.
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*/
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enum { ENTRYPOINT_STACK_SIZE = 12*1024 };
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Genode::Rpc_entrypoint _entrypoint;
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Genode::Region_map_client _address_space;
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Genode::Rom_session_client _rom;
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Genode::Pd_session_client _pd;
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Genode::Ram_session_client _ram;
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Genode::Cpu_session_client _cpu;
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Genode::Child::Initial_thread _initial_thread;
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Genode::Server _server;
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Launchpad_child_policy _policy;
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Genode::Child _child;
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public:
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Launchpad_child(const char *name,
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Genode::Dataspace_capability elf_ds,
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Genode::Pd_session_capability pd,
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Genode::Ram_session_capability ram,
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Genode::Cpu_session_capability cpu,
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Genode::Rom_session_capability rom,
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Genode::Cap_session *cap_session,
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Genode::Service_registry *parent_services,
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Genode::Service_registry *child_services,
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Genode::Dataspace_capability config_ds,
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Launchpad *launchpad)
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:
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_launchpad(launchpad),
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_entrypoint(cap_session, ENTRYPOINT_STACK_SIZE, name, false),
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_address_space(Genode::Pd_session_client(pd).address_space()),
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_rom(rom), _pd(pd), _ram(ram), _cpu(cpu),
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_initial_thread(_cpu, _pd, name), _server(_ram),
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_policy(name, &_server, parent_services, child_services,
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config_ds, elf_ds, &_entrypoint),
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_child(elf_ds, _ldso_ds(), _pd, _pd, _ram, _ram, _cpu,
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_initial_thread, *Genode::env()->rm_session(),
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_address_space, _entrypoint, _policy)
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{
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_entrypoint.activate();
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}
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/**
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* Required to forcefully kill client which blocks on a session
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* opening quest where the service is not up yet.
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*/
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void cancel_blocking() { _entrypoint.cancel_blocking(); }
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Genode::Rom_session_capability rom_session_cap() { return _rom; }
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Genode::Ram_session_capability ram_session_cap() { return _ram; }
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Genode::Cpu_session_capability cpu_session_cap() { return _cpu; }
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const char *name() const { return _policy.name(); }
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const Genode::Server *server() const { return &_server; }
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Genode::Allocator *heap() { return _child.heap(); }
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void revoke_server(const Genode::Server *server) {
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_child.revoke_server(server); }
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};
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@ -231,31 +207,31 @@ class Launchpad
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{
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private:
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Genode::Env &_env;
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Genode::Heap _heap { _env.ram(), _env.rm() };
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unsigned long _initial_quota;
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Genode::Service_registry _parent_services;
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Genode::Service_registry _child_services;
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Launchpad_child::Parent_services _parent_services;
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Launchpad_child::Child_services _child_services;
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Genode::Lock _children_lock;
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Genode::List<Launchpad_child> _children;
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bool _child_name_exists(const char *name);
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void _get_unique_child_name(const char *filename, char *dst, int dst_len);
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bool _child_name_exists(Launchpad_child::Name const &);
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Launchpad_child::Name _get_unique_child_name(Launchpad_child::Name const &);
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Genode::Sliced_heap _sliced_heap;
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/* cap session for allocating capabilities for parent interfaces */
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Genode::Cap_connection _cap_session;
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protected:
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int _ypos;
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public:
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Genode::Lock gui_lock;
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Launchpad(unsigned long initial_quota);
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Launchpad(Genode::Env &env, unsigned long initial_quota);
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unsigned long initial_quota() { return _initial_quota; }
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@ -273,36 +249,26 @@ class Launchpad
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virtual void quota(unsigned long quota) { }
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virtual void add_launcher(const char *filename,
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virtual void add_launcher(Launchpad_child::Name const &binary_name,
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unsigned long default_quota,
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Genode::Dataspace_capability config_ds) { }
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virtual void add_child(const char *unique_name,
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virtual void add_child(Launchpad_child::Name const &,
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unsigned long quota,
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Launchpad_child *launchpad_child,
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Genode::Allocator *alloc) { }
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Launchpad_child &,
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Genode::Allocator &) { }
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virtual void remove_child(const char *name,
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Genode::Allocator *alloc) { }
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virtual void remove_child(Launchpad_child::Name const &,
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Genode::Allocator &) { }
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Launchpad_child *start_child(const char *prg_name, unsigned long quota,
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Launchpad_child *start_child(Launchpad_child::Name const &binary_name,
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unsigned long quota,
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Genode::Dataspace_capability config_ds);
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/**
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* Exit child and close all its sessions
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*
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* \param timer Timer session to use for watchdog
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* mechanism. When using the default
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* value, a new timer session gets
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* created during the 'exit_child'
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* call.
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* \param session_close_timeout_ms Timeout in milliseconds until a an
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* unresponsive service->close call
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* gets canceled.
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*/
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void exit_child(Launchpad_child *child,
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Timer::Session *timer = 0,
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int session_close_timeout_ms = 2000);
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void exit_child(Launchpad_child &child);
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};
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#endif /* _INCLUDE__LAUNCHPAD__LAUNCHPAD_H_ */
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Block a user