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genode_c_api: add config update to block interface

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Ref genodelabs/genode#4653
This commit is contained in:
Stefan Kalkowski 2022-10-27 13:47:54 +02:00 committed by Christian Helmuth
parent d8d9f94075
commit 11a6117da6
2 changed files with 32 additions and 11 deletions
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6
repos/os/include/genode_c_api/block.h
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@ -21,8 +21,11 @@ struct genode_block_session; /* definition is private to the implementation */
#ifdef __cplusplus
void genode_block_apply_config(Genode::Xml_node const & config);
extern "C" {
#endif
#endif /* __cplusplus */
/********************
@ -41,6 +44,7 @@ void genode_block_init(struct genode_env *env,
genode_shared_dataspace_free_t);
/**************************************
** Block device lifetime management **
**************************************/

37
repos/os/src/lib/genode_c_api/block.cc
View File

@ -11,11 +11,10 @@
* under the terms of the GNU Affero General Public License version 3.
*/
#include <base/attached_dataspace.h>
#include <base/attached_rom_dataspace.h>
#include <base/env.h>
#include <block/request_stream.h>
#include <root/component.h>
#include <os/buffered_xml.h>
#include <os/reporter.h>
#include <os/session_policy.h>
@ -106,12 +105,13 @@ class Root : public Root_component<genode_block_session>
: name(name), info(info) {}
};
Env & _env;
Signal_context_capability _sigh_cap;
Attached_rom_dataspace _config { _env, "config" };
Reporter _reporter { _env, "block_devices" };
Constructible<Session_info> _sessions[MAX_BLOCK_DEVICES];
bool _announced { false };
Env & _env;
Signal_context_capability _sigh_cap;
Constructible<Buffered_xml> _config { };
Reporter _reporter { _env, "block_devices" };
Constructible<Session_info> _sessions[MAX_BLOCK_DEVICES];
bool _announced { false };
bool _report_needed { false };
Root(const Root&);
Root & operator=(const Root&);
@ -141,6 +141,7 @@ class Root : public Root_component<genode_block_session>
void discontinue_device(const char * name);
genode_block_session * session(const char * name);
void notify_peers();
void apply_config(Xml_node const &);
};
@ -235,8 +236,11 @@ genode_block_session::genode_block_session(Env & env,
genode_block_session * ::Root::_create_session(const char * args,
Affinity const &)
{
if (!_config.constructed())
throw Service_denied();
Session_label const label = label_from_args(args);
Session_policy const policy(label, _config.xml());
Session_policy const policy(label, _config->xml());
Session_info::Name const device =
policy.attribute_value("device", Session_info::Name());
@ -283,7 +287,7 @@ void ::Root::_destroy_session(genode_block_session * session)
void ::Root::_report()
{
if (!_config.xml().attribute_value("report", false))
if (!_report_needed)
return;
_reporter.enabled(true);
@ -351,6 +355,13 @@ void ::Root::notify_peers()
}
void ::Root::apply_config(Xml_node const & config)
{
_config.construct(*md_alloc(), config);
_report_needed = config.attribute_value("report", false);
}
::Root::Root(Env & env, Allocator & alloc, Signal_context_capability cap)
:
Root_component<genode_block_session>(env.ep(), alloc),
@ -423,3 +434,9 @@ extern "C" void genode_block_notify_peers()
{
if (_block_root) _block_root->notify_peers();
}
void genode_block_apply_config(Xml_node const & config)
{
if (_block_root) _block_root->apply_config(config);
}