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refactor(userspace/falco): init all event sources in falco engine and in the right order

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Signed-off-by: Jason Dellaluce <jasondellaluce@gmail.com>
This commit is contained in:
Jason Dellaluce
2022-08-30 12:45:57 +00:00
committed by poiana
parent 8ba779de8c
commit ed025f1a86
1 changed files with 70 additions and 16 deletions
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82
userspace/falco/app_actions/init_falco_engine.cpp
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@@ -14,9 +14,8 @@ See the License for the specific language governing permissions and
limitations under the License.
*/
#include <sstream>
#include "application.h"
#include <plugin_manager.h>
using namespace falco::app;
@@ -57,25 +56,80 @@ void application::configure_output_format()
}
}
application::run_result application::init_falco_engine()
void application::add_source_to_engine(const std::string& src)
{
configure_output_format();
auto src_info = m_state->sources.at(src);
std::shared_ptr<gen_event_filter_factory> filter_factory = nullptr;
std::shared_ptr<gen_event_formatter_factory> formatter_factory = nullptr;
// Create "factories" that can create filters/formatters for syscalls
// libs requires raw pointer, we should modify libs to use reference/shared_ptr
std::shared_ptr<gen_event_filter_factory> syscall_filter_factory(new sinsp_filter_factory(m_state->inspector.get()));
// libs requires raw pointer, we should modify libs to use reference/shared_ptr
std::shared_ptr<gen_event_formatter_factory> syscall_formatter_factory(new sinsp_evt_formatter_factory(m_state->inspector.get()));
m_state->syscall_source_idx = m_state->engine->add_source(falco_common::syscall_source, syscall_filter_factory, syscall_formatter_factory);
if (src == falco_common::syscall_source)
{
filter_factory = std::shared_ptr<gen_event_filter_factory>(
new sinsp_filter_factory(src_info->inspector.get()));
formatter_factory = std::shared_ptr<gen_event_formatter_factory>(
new sinsp_evt_formatter_factory(src_info->inspector.get()));
}
else
{
auto &filterchecks = m_state->sources.at(src)->filterchecks;
filter_factory = std::shared_ptr<gen_event_filter_factory>(
new sinsp_filter_factory(src_info->inspector.get(), filterchecks));
formatter_factory = std::shared_ptr<gen_event_formatter_factory>(
new sinsp_evt_formatter_factory(src_info->inspector.get(), filterchecks));
}
if(m_state->config->m_json_output)
{
syscall_formatter_factory->set_output_format(gen_event_formatter::OF_JSON);
formatter_factory->set_output_format(gen_event_formatter::OF_JSON);
}
src_info->engine_idx = m_state->engine->add_source(
src, filter_factory, formatter_factory);
}
application::run_result application::init_falco_engine()
{
// add all non-syscall event sources in engine
for (const auto& src : m_state->loaded_sources)
{
if (src != falco_common::syscall_source)
{
// we skip the syscall as we want it to be the one added for last
// in the engine. This makes the source index assignment easier.
add_source_to_engine(src);
}
}
// add syscall as last source
add_source_to_engine(falco_common::syscall_source);
// note: in capture mode, we can assume that the plugin source index will
// be the same in both the falco engine and the sinsp plugin manager.
// This assumption stands because the plugin manager stores sources in a
// vector, and the syscall source is appended in the engine *after* the sources
// coming from plugins. The reason why this can't work with live mode,
// is because in that case event sources are scattered across different
// inspectors. Since this is an implementation-based assumption, we
// check this and return an error to spot regressions in the future.
if (is_capture_mode())
{
auto manager = m_state->offline_inspector->get_plugin_manager();
for (const auto &p : manager->plugins())
{
if (p->caps() & CAP_SOURCING)
{
bool added = false;
auto source_idx = manager->source_idx_by_plugin_id(p->id(), added);
auto engine_idx = m_state->sources.at(p->event_source())->engine_idx;
if (!added || source_idx != engine_idx)
{
return run_result::fatal("Could not add event source in the engine: " + p->event_source());
}
}
}
}
configure_output_format();
m_state->engine->set_min_priority(m_state->config->m_min_priority);
return run_result::ok();