*/
#define BT_COMP_LOG_SELF_COMP self_comp
-#define BT_LOG_OUTPUT_LEVEL log_level
-#define BT_LOG_TAG "PLUGIN/SRC.CTF.LTTNG-LIVE"
+#define BT_LOG_OUTPUT_LEVEL log_level
+#define BT_LOG_TAG "PLUGIN/SRC.CTF.LTTNG-LIVE"
#include "logging/comp-logging.h"
#include <inttypes.h>
#include "metadata.hpp"
#include "lttng-live.hpp"
-#define MAX_QUERY_SIZE (256*1024)
-#define URL_PARAM "url"
-#define INPUTS_PARAM "inputs"
-#define SESS_NOT_FOUND_ACTION_PARAM "session-not-found-action"
-#define SESS_NOT_FOUND_ACTION_CONTINUE_STR "continue"
-#define SESS_NOT_FOUND_ACTION_FAIL_STR "fail"
-#define SESS_NOT_FOUND_ACTION_END_STR "end"
+#define MAX_QUERY_SIZE (256 * 1024)
+#define URL_PARAM "url"
+#define INPUTS_PARAM "inputs"
+#define SESS_NOT_FOUND_ACTION_PARAM "session-not-found-action"
+#define SESS_NOT_FOUND_ACTION_CONTINUE_STR "continue"
+#define SESS_NOT_FOUND_ACTION_FAIL_STR "fail"
+#define SESS_NOT_FOUND_ACTION_END_STR "end"
-#define print_dbg(fmt, ...) BT_COMP_LOGD(fmt, ## __VA_ARGS__)
+#define print_dbg(fmt, ...) BT_COMP_LOGD(fmt, ##__VA_ARGS__)
-static
-const char *lttng_live_iterator_status_string(
- enum lttng_live_iterator_status status)
+static const char *lttng_live_iterator_status_string(enum lttng_live_iterator_status status)
{
- switch (status) {
- case LTTNG_LIVE_ITERATOR_STATUS_CONTINUE:
- return "LTTNG_LIVE_ITERATOR_STATUS_CONTINUE";
- case LTTNG_LIVE_ITERATOR_STATUS_AGAIN:
- return "LTTNG_LIVE_ITERATOR_STATUS_AGAIN";
- case LTTNG_LIVE_ITERATOR_STATUS_END:
- return "LTTNG_LIVE_ITERATOR_STATUS_END";
- case LTTNG_LIVE_ITERATOR_STATUS_OK:
- return "LTTNG_LIVE_ITERATOR_STATUS_OK";
- case LTTNG_LIVE_ITERATOR_STATUS_INVAL:
- return "LTTNG_LIVE_ITERATOR_STATUS_INVAL";
- case LTTNG_LIVE_ITERATOR_STATUS_ERROR:
- return "LTTNG_LIVE_ITERATOR_STATUS_ERROR";
- case LTTNG_LIVE_ITERATOR_STATUS_NOMEM:
- return "LTTNG_LIVE_ITERATOR_STATUS_NOMEM";
- case LTTNG_LIVE_ITERATOR_STATUS_UNSUPPORTED:
- return "LTTNG_LIVE_ITERATOR_STATUS_UNSUPPORTED";
- default:
- bt_common_abort();
- }
+ switch (status) {
+ case LTTNG_LIVE_ITERATOR_STATUS_CONTINUE:
+ return "LTTNG_LIVE_ITERATOR_STATUS_CONTINUE";
+ case LTTNG_LIVE_ITERATOR_STATUS_AGAIN:
+ return "LTTNG_LIVE_ITERATOR_STATUS_AGAIN";
+ case LTTNG_LIVE_ITERATOR_STATUS_END:
+ return "LTTNG_LIVE_ITERATOR_STATUS_END";
+ case LTTNG_LIVE_ITERATOR_STATUS_OK:
+ return "LTTNG_LIVE_ITERATOR_STATUS_OK";
+ case LTTNG_LIVE_ITERATOR_STATUS_INVAL:
+ return "LTTNG_LIVE_ITERATOR_STATUS_INVAL";
+ case LTTNG_LIVE_ITERATOR_STATUS_ERROR:
+ return "LTTNG_LIVE_ITERATOR_STATUS_ERROR";
+ case LTTNG_LIVE_ITERATOR_STATUS_NOMEM:
+ return "LTTNG_LIVE_ITERATOR_STATUS_NOMEM";
+ case LTTNG_LIVE_ITERATOR_STATUS_UNSUPPORTED:
+ return "LTTNG_LIVE_ITERATOR_STATUS_UNSUPPORTED";
+ default:
+ bt_common_abort();
+ }
}
-static
-const char *lttng_live_stream_state_string(enum lttng_live_stream_state state)
+static const char *lttng_live_stream_state_string(enum lttng_live_stream_state state)
{
- switch (state) {
- case LTTNG_LIVE_STREAM_ACTIVE_NO_DATA:
- return "ACTIVE_NO_DATA";
- case LTTNG_LIVE_STREAM_QUIESCENT_NO_DATA:
- return "QUIESCENT_NO_DATA";
- case LTTNG_LIVE_STREAM_QUIESCENT:
- return "QUIESCENT";
- case LTTNG_LIVE_STREAM_ACTIVE_DATA:
- return "ACTIVE_DATA";
- case LTTNG_LIVE_STREAM_EOF:
- return "EOF";
- default:
- return "ERROR";
- }
+ switch (state) {
+ case LTTNG_LIVE_STREAM_ACTIVE_NO_DATA:
+ return "ACTIVE_NO_DATA";
+ case LTTNG_LIVE_STREAM_QUIESCENT_NO_DATA:
+ return "QUIESCENT_NO_DATA";
+ case LTTNG_LIVE_STREAM_QUIESCENT:
+ return "QUIESCENT";
+ case LTTNG_LIVE_STREAM_ACTIVE_DATA:
+ return "ACTIVE_DATA";
+ case LTTNG_LIVE_STREAM_EOF:
+ return "EOF";
+ default:
+ return "ERROR";
+ }
}
void lttng_live_stream_iterator_set_state(struct lttng_live_stream_iterator *stream_iter,
- enum lttng_live_stream_state new_state)
+ enum lttng_live_stream_state new_state)
{
- bt_self_component *self_comp = stream_iter->self_comp;
- bt_logging_level log_level = stream_iter->log_level;
+ bt_self_component *self_comp = stream_iter->self_comp;
+ bt_logging_level log_level = stream_iter->log_level;
- BT_COMP_LOGD("Setting live stream iterator state: viewer-stream-id=%" PRIu64
- ", old-state=%s, new-state=%s",
- stream_iter->viewer_stream_id,
- lttng_live_stream_state_string(stream_iter->state),
- lttng_live_stream_state_string(new_state));
+ BT_COMP_LOGD("Setting live stream iterator state: viewer-stream-id=%" PRIu64
+ ", old-state=%s, new-state=%s",
+ stream_iter->viewer_stream_id, lttng_live_stream_state_string(stream_iter->state),
+ lttng_live_stream_state_string(new_state));
- stream_iter->state = new_state;
+ stream_iter->state = new_state;
}
-#define LTTNG_LIVE_LOGD_STREAM_ITER(live_stream_iter) \
- do { \
- BT_COMP_LOGD("Live stream iterator state=%s, " \
- "last-inact-ts-is-set=%d, last-inact-ts-value=%" PRId64 ", " \
- "curr-inact-ts=%" PRId64, \
- lttng_live_stream_state_string(live_stream_iter->state), \
- live_stream_iter->last_inactivity_ts.is_set, \
- live_stream_iter->last_inactivity_ts.value, \
- live_stream_iter->current_inactivity_ts); \
- } while (0);
+#define LTTNG_LIVE_LOGD_STREAM_ITER(live_stream_iter) \
+ do { \
+ BT_COMP_LOGD("Live stream iterator state=%s, " \
+ "last-inact-ts-is-set=%d, last-inact-ts-value=%" PRId64 ", " \
+ "curr-inact-ts=%" PRId64, \
+ lttng_live_stream_state_string(live_stream_iter->state), \
+ live_stream_iter->last_inactivity_ts.is_set, \
+ live_stream_iter->last_inactivity_ts.value, \
+ live_stream_iter->current_inactivity_ts); \
+ } while (0);
BT_HIDDEN
bool lttng_live_graph_is_canceled(struct lttng_live_msg_iter *msg_iter)
{
- bool ret;
+ bool ret;
- if (!msg_iter) {
- ret = false;
- goto end;
- }
+ if (!msg_iter) {
+ ret = false;
+ goto end;
+ }
- ret = bt_self_message_iterator_is_interrupted(
- msg_iter->self_msg_iter);
+ ret = bt_self_message_iterator_is_interrupted(msg_iter->self_msg_iter);
end:
- return ret;
+ return ret;
}
-static
-struct lttng_live_trace *lttng_live_session_borrow_trace_by_id(struct lttng_live_session *session,
- uint64_t trace_id)
+static struct lttng_live_trace *
+lttng_live_session_borrow_trace_by_id(struct lttng_live_session *session, uint64_t trace_id)
{
- uint64_t trace_idx;
- struct lttng_live_trace *ret_trace = NULL;
-
- for (trace_idx = 0; trace_idx < session->traces->len; trace_idx++) {
- struct lttng_live_trace *trace =
- (lttng_live_trace *) g_ptr_array_index(session->traces, trace_idx);
- if (trace->id == trace_id) {
- ret_trace = trace;
- goto end;
- }
- }
+ uint64_t trace_idx;
+ struct lttng_live_trace *ret_trace = NULL;
+
+ for (trace_idx = 0; trace_idx < session->traces->len; trace_idx++) {
+ struct lttng_live_trace *trace =
+ (lttng_live_trace *) g_ptr_array_index(session->traces, trace_idx);
+ if (trace->id == trace_id) {
+ ret_trace = trace;
+ goto end;
+ }
+ }
end:
- return ret_trace;
+ return ret_trace;
}
-static
-void lttng_live_destroy_trace(struct lttng_live_trace *trace)
+static void lttng_live_destroy_trace(struct lttng_live_trace *trace)
{
- bt_logging_level log_level = trace->log_level;
- bt_self_component *self_comp = trace->self_comp;
+ bt_logging_level log_level = trace->log_level;
+ bt_self_component *self_comp = trace->self_comp;
- BT_COMP_LOGD("Destroying live trace: trace-id=%" PRIu64, trace->id);
+ BT_COMP_LOGD("Destroying live trace: trace-id=%" PRIu64, trace->id);
- BT_ASSERT(trace->stream_iterators);
- g_ptr_array_free(trace->stream_iterators, TRUE);
+ BT_ASSERT(trace->stream_iterators);
+ g_ptr_array_free(trace->stream_iterators, TRUE);
- BT_TRACE_PUT_REF_AND_RESET(trace->trace);
- BT_TRACE_CLASS_PUT_REF_AND_RESET(trace->trace_class);
+ BT_TRACE_PUT_REF_AND_RESET(trace->trace);
+ BT_TRACE_CLASS_PUT_REF_AND_RESET(trace->trace_class);
- lttng_live_metadata_fini(trace);
- g_free(trace);
+ lttng_live_metadata_fini(trace);
+ g_free(trace);
}
-static
-struct lttng_live_trace *lttng_live_create_trace(struct lttng_live_session *session,
- uint64_t trace_id)
+static struct lttng_live_trace *lttng_live_create_trace(struct lttng_live_session *session,
+ uint64_t trace_id)
{
- struct lttng_live_trace *trace = NULL;
- bt_logging_level log_level = session->log_level;
- bt_self_component *self_comp = session->self_comp;
-
- BT_COMP_LOGD("Creating live trace: "
- "session-id=%" PRIu64 ", trace-id=%" PRIu64,
- session->id, trace_id);
- trace = g_new0(struct lttng_live_trace, 1);
- if (!trace) {
- BT_COMP_LOGE_APPEND_CAUSE(self_comp,
- "Failed to allocate live trace");
- goto error;
- }
- trace->log_level = session->log_level;
- trace->self_comp = session->self_comp;
- trace->session = session;
- trace->id = trace_id;
- trace->trace_class = NULL;
- trace->trace = NULL;
- trace->stream_iterators = g_ptr_array_new_with_free_func(
- (GDestroyNotify) lttng_live_stream_iterator_destroy);
- BT_ASSERT(trace->stream_iterators);
- trace->metadata_stream_state = LTTNG_LIVE_METADATA_STREAM_STATE_NEEDED;
- g_ptr_array_add(session->traces, trace);
-
- goto end;
+ struct lttng_live_trace *trace = NULL;
+ bt_logging_level log_level = session->log_level;
+ bt_self_component *self_comp = session->self_comp;
+
+ BT_COMP_LOGD("Creating live trace: "
+ "session-id=%" PRIu64 ", trace-id=%" PRIu64,
+ session->id, trace_id);
+ trace = g_new0(struct lttng_live_trace, 1);
+ if (!trace) {
+ BT_COMP_LOGE_APPEND_CAUSE(self_comp, "Failed to allocate live trace");
+ goto error;
+ }
+ trace->log_level = session->log_level;
+ trace->self_comp = session->self_comp;
+ trace->session = session;
+ trace->id = trace_id;
+ trace->trace_class = NULL;
+ trace->trace = NULL;
+ trace->stream_iterators =
+ g_ptr_array_new_with_free_func((GDestroyNotify) lttng_live_stream_iterator_destroy);
+ BT_ASSERT(trace->stream_iterators);
+ trace->metadata_stream_state = LTTNG_LIVE_METADATA_STREAM_STATE_NEEDED;
+ g_ptr_array_add(session->traces, trace);
+
+ goto end;
error:
- g_free(trace);
- trace = NULL;
+ g_free(trace);
+ trace = NULL;
end:
- return trace;
+ return trace;
}
BT_HIDDEN
-struct lttng_live_trace *lttng_live_session_borrow_or_create_trace_by_id(
- struct lttng_live_session *session, uint64_t trace_id)
+struct lttng_live_trace *
+lttng_live_session_borrow_or_create_trace_by_id(struct lttng_live_session *session,
+ uint64_t trace_id)
{
- struct lttng_live_trace *trace;
+ struct lttng_live_trace *trace;
- trace = lttng_live_session_borrow_trace_by_id(session, trace_id);
- if (trace) {
- goto end;
- }
+ trace = lttng_live_session_borrow_trace_by_id(session, trace_id);
+ if (trace) {
+ goto end;
+ }
- /* The session is the owner of the newly created trace. */
- trace = lttng_live_create_trace(session, trace_id);
+ /* The session is the owner of the newly created trace. */
+ trace = lttng_live_create_trace(session, trace_id);
end:
- return trace;
+ return trace;
}
BT_HIDDEN
-int lttng_live_add_session(struct lttng_live_msg_iter *lttng_live_msg_iter,
- uint64_t session_id, const char *hostname,
- const char *session_name)
+int lttng_live_add_session(struct lttng_live_msg_iter *lttng_live_msg_iter, uint64_t session_id,
+ const char *hostname, const char *session_name)
{
- int ret = 0;
- struct lttng_live_session *session;
- bt_logging_level log_level = lttng_live_msg_iter->log_level;
- bt_self_component *self_comp = lttng_live_msg_iter->self_comp;
-
- BT_COMP_LOGD("Adding live session: "
- "session-id=%" PRIu64 ", hostname=\"%s\" session-name=\"%s\"",
- session_id, hostname, session_name);
-
- session = g_new0(struct lttng_live_session, 1);
- if (!session) {
- BT_COMP_LOGE_APPEND_CAUSE(self_comp,
- "Failed to allocate live session");
- goto error;
- }
-
- session->log_level = lttng_live_msg_iter->log_level;
- session->self_comp = lttng_live_msg_iter->self_comp;
- session->id = session_id;
- session->traces = g_ptr_array_new_with_free_func(
- (GDestroyNotify) lttng_live_destroy_trace);
- BT_ASSERT(session->traces);
- session->lttng_live_msg_iter = lttng_live_msg_iter;
- session->new_streams_needed = true;
- session->hostname = g_string_new(hostname);
- BT_ASSERT(session->hostname);
-
- session->session_name = g_string_new(session_name);
- BT_ASSERT(session->session_name);
-
- g_ptr_array_add(lttng_live_msg_iter->sessions, session);
- goto end;
+ int ret = 0;
+ struct lttng_live_session *session;
+ bt_logging_level log_level = lttng_live_msg_iter->log_level;
+ bt_self_component *self_comp = lttng_live_msg_iter->self_comp;
+
+ BT_COMP_LOGD("Adding live session: "
+ "session-id=%" PRIu64 ", hostname=\"%s\" session-name=\"%s\"",
+ session_id, hostname, session_name);
+
+ session = g_new0(struct lttng_live_session, 1);
+ if (!session) {
+ BT_COMP_LOGE_APPEND_CAUSE(self_comp, "Failed to allocate live session");
+ goto error;
+ }
+
+ session->log_level = lttng_live_msg_iter->log_level;
+ session->self_comp = lttng_live_msg_iter->self_comp;
+ session->id = session_id;
+ session->traces = g_ptr_array_new_with_free_func((GDestroyNotify) lttng_live_destroy_trace);
+ BT_ASSERT(session->traces);
+ session->lttng_live_msg_iter = lttng_live_msg_iter;
+ session->new_streams_needed = true;
+ session->hostname = g_string_new(hostname);
+ BT_ASSERT(session->hostname);
+
+ session->session_name = g_string_new(session_name);
+ BT_ASSERT(session->session_name);
+
+ g_ptr_array_add(lttng_live_msg_iter->sessions, session);
+ goto end;
error:
- g_free(session);
- ret = -1;
+ g_free(session);
+ ret = -1;
end:
- return ret;
+ return ret;
}
-static
-void lttng_live_destroy_session(struct lttng_live_session *session)
+static void lttng_live_destroy_session(struct lttng_live_session *session)
{
- bt_logging_level log_level;
- bt_self_component *self_comp;
-
- if (!session) {
- goto end;
- }
-
- log_level = session->log_level;
- self_comp = session->self_comp;
- BT_COMP_LOGD("Destroying live session: "
- "session-id=%" PRIu64 ", session-name=\"%s\"",
- session->id, session->session_name->str);
- if (session->id != -1ULL) {
- if (lttng_live_session_detach(session)) {
- if (!lttng_live_graph_is_canceled(
- session->lttng_live_msg_iter)) {
- /* Old relayd cannot detach sessions. */
- BT_COMP_LOGD("Unable to detach lttng live session %" PRIu64,
- session->id);
- }
- }
- session->id = -1ULL;
- }
-
- if (session->traces) {
- g_ptr_array_free(session->traces, TRUE);
- }
-
- if (session->hostname) {
- g_string_free(session->hostname, TRUE);
- }
- if (session->session_name) {
- g_string_free(session->session_name, TRUE);
- }
- g_free(session);
+ bt_logging_level log_level;
+ bt_self_component *self_comp;
+
+ if (!session) {
+ goto end;
+ }
+
+ log_level = session->log_level;
+ self_comp = session->self_comp;
+ BT_COMP_LOGD("Destroying live session: "
+ "session-id=%" PRIu64 ", session-name=\"%s\"",
+ session->id, session->session_name->str);
+ if (session->id != -1ULL) {
+ if (lttng_live_session_detach(session)) {
+ if (!lttng_live_graph_is_canceled(session->lttng_live_msg_iter)) {
+ /* Old relayd cannot detach sessions. */
+ BT_COMP_LOGD("Unable to detach lttng live session %" PRIu64, session->id);
+ }
+ }
+ session->id = -1ULL;
+ }
+
+ if (session->traces) {
+ g_ptr_array_free(session->traces, TRUE);
+ }
+
+ if (session->hostname) {
+ g_string_free(session->hostname, TRUE);
+ }
+ if (session->session_name) {
+ g_string_free(session->session_name, TRUE);
+ }
+ g_free(session);
end:
- return;
+ return;
}
-static
-void lttng_live_msg_iter_destroy(struct lttng_live_msg_iter *lttng_live_msg_iter)
+static void lttng_live_msg_iter_destroy(struct lttng_live_msg_iter *lttng_live_msg_iter)
{
- if (!lttng_live_msg_iter) {
- goto end;
- }
+ if (!lttng_live_msg_iter) {
+ goto end;
+ }
- if (lttng_live_msg_iter->sessions) {
- g_ptr_array_free(lttng_live_msg_iter->sessions, TRUE);
- }
+ if (lttng_live_msg_iter->sessions) {
+ g_ptr_array_free(lttng_live_msg_iter->sessions, TRUE);
+ }
- if (lttng_live_msg_iter->viewer_connection) {
- live_viewer_connection_destroy(lttng_live_msg_iter->viewer_connection);
- }
- BT_ASSERT(lttng_live_msg_iter->lttng_live_comp);
- BT_ASSERT(lttng_live_msg_iter->lttng_live_comp->has_msg_iter);
+ if (lttng_live_msg_iter->viewer_connection) {
+ live_viewer_connection_destroy(lttng_live_msg_iter->viewer_connection);
+ }
+ BT_ASSERT(lttng_live_msg_iter->lttng_live_comp);
+ BT_ASSERT(lttng_live_msg_iter->lttng_live_comp->has_msg_iter);
- /* All stream iterators must be destroyed at this point. */
- BT_ASSERT(lttng_live_msg_iter->active_stream_iter == 0);
- lttng_live_msg_iter->lttng_live_comp->has_msg_iter = false;
+ /* All stream iterators must be destroyed at this point. */
+ BT_ASSERT(lttng_live_msg_iter->active_stream_iter == 0);
+ lttng_live_msg_iter->lttng_live_comp->has_msg_iter = false;
- g_free(lttng_live_msg_iter);
+ g_free(lttng_live_msg_iter);
end:
- return;
+ return;
}
BT_HIDDEN
void lttng_live_msg_iter_finalize(bt_self_message_iterator *self_msg_iter)
{
- struct lttng_live_msg_iter *lttng_live_msg_iter;
+ struct lttng_live_msg_iter *lttng_live_msg_iter;
- BT_ASSERT(self_msg_iter);
+ BT_ASSERT(self_msg_iter);
- lttng_live_msg_iter = (struct lttng_live_msg_iter *)
- bt_self_message_iterator_get_data(self_msg_iter);
- BT_ASSERT(lttng_live_msg_iter);
- lttng_live_msg_iter_destroy(lttng_live_msg_iter);
+ lttng_live_msg_iter =
+ (struct lttng_live_msg_iter *) bt_self_message_iterator_get_data(self_msg_iter);
+ BT_ASSERT(lttng_live_msg_iter);
+ lttng_live_msg_iter_destroy(lttng_live_msg_iter);
}
-static
-enum lttng_live_iterator_status lttng_live_iterator_next_check_stream_state(
- struct lttng_live_stream_iterator *lttng_live_stream)
+static enum lttng_live_iterator_status
+lttng_live_iterator_next_check_stream_state(struct lttng_live_stream_iterator *lttng_live_stream)
{
- bt_logging_level log_level = lttng_live_stream->log_level;
- bt_self_component *self_comp = lttng_live_stream->self_comp;
-
- switch (lttng_live_stream->state) {
- case LTTNG_LIVE_STREAM_QUIESCENT:
- case LTTNG_LIVE_STREAM_ACTIVE_DATA:
- break;
- case LTTNG_LIVE_STREAM_ACTIVE_NO_DATA:
- /* Invalid state. */
- BT_COMP_LOGF("Unexpected stream state \"ACTIVE_NO_DATA\"");
- bt_common_abort();
- case LTTNG_LIVE_STREAM_QUIESCENT_NO_DATA:
- /* Invalid state. */
- BT_COMP_LOGF("Unexpected stream state \"QUIESCENT_NO_DATA\"");
- bt_common_abort();
- case LTTNG_LIVE_STREAM_EOF:
- break;
- }
- return LTTNG_LIVE_ITERATOR_STATUS_OK;
+ bt_logging_level log_level = lttng_live_stream->log_level;
+ bt_self_component *self_comp = lttng_live_stream->self_comp;
+
+ switch (lttng_live_stream->state) {
+ case LTTNG_LIVE_STREAM_QUIESCENT:
+ case LTTNG_LIVE_STREAM_ACTIVE_DATA:
+ break;
+ case LTTNG_LIVE_STREAM_ACTIVE_NO_DATA:
+ /* Invalid state. */
+ BT_COMP_LOGF("Unexpected stream state \"ACTIVE_NO_DATA\"");
+ bt_common_abort();
+ case LTTNG_LIVE_STREAM_QUIESCENT_NO_DATA:
+ /* Invalid state. */
+ BT_COMP_LOGF("Unexpected stream state \"QUIESCENT_NO_DATA\"");
+ bt_common_abort();
+ case LTTNG_LIVE_STREAM_EOF:
+ break;
+ }
+ return LTTNG_LIVE_ITERATOR_STATUS_OK;
}
/*
* - have no data on this stream at this point: need to retry (AGAIN) or return
* EOF.
*/
-static
-enum lttng_live_iterator_status lttng_live_iterator_next_handle_one_no_data_stream(
- struct lttng_live_msg_iter *lttng_live_msg_iter,
- struct lttng_live_stream_iterator *lttng_live_stream)
+static enum lttng_live_iterator_status lttng_live_iterator_next_handle_one_no_data_stream(
+ struct lttng_live_msg_iter *lttng_live_msg_iter,
+ struct lttng_live_stream_iterator *lttng_live_stream)
{
- bt_logging_level log_level = lttng_live_msg_iter->log_level;
- bt_self_component *self_comp = lttng_live_msg_iter->self_comp;
- enum lttng_live_iterator_status ret = LTTNG_LIVE_ITERATOR_STATUS_OK;
- enum lttng_live_stream_state orig_state = lttng_live_stream->state;
- struct packet_index index;
-
- if (lttng_live_stream->trace->metadata_stream_state ==
- LTTNG_LIVE_METADATA_STREAM_STATE_NEEDED) {
- BT_COMP_LOGD("Need to get an update for the metadata stream before proceeding further with this stream: "
- "stream-name=\"%s\"", lttng_live_stream->name->str);
- ret = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE;
- goto end;
- }
-
- if (lttng_live_stream->trace->session->new_streams_needed) {
- BT_COMP_LOGD("Need to get an update of all streams before proceeding further with this stream: "
- "stream-name=\"%s\"", lttng_live_stream->name->str);
- ret = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE;
- goto end;
- }
-
- if (lttng_live_stream->state != LTTNG_LIVE_STREAM_ACTIVE_NO_DATA &&
- lttng_live_stream->state != LTTNG_LIVE_STREAM_QUIESCENT_NO_DATA) {
- goto end;
- }
- ret = lttng_live_get_next_index(lttng_live_msg_iter, lttng_live_stream,
- &index);
- if (ret != LTTNG_LIVE_ITERATOR_STATUS_OK) {
- goto end;
- }
-
- BT_ASSERT_DBG(lttng_live_stream->state != LTTNG_LIVE_STREAM_EOF);
-
- if (lttng_live_stream->state == LTTNG_LIVE_STREAM_QUIESCENT) {
- uint64_t last_inact_ts = lttng_live_stream->last_inactivity_ts.value,
- curr_inact_ts = lttng_live_stream->current_inactivity_ts;
-
- if (orig_state == LTTNG_LIVE_STREAM_QUIESCENT_NO_DATA &&
- last_inact_ts == curr_inact_ts) {
- /*
+ bt_logging_level log_level = lttng_live_msg_iter->log_level;
+ bt_self_component *self_comp = lttng_live_msg_iter->self_comp;
+ enum lttng_live_iterator_status ret = LTTNG_LIVE_ITERATOR_STATUS_OK;
+ enum lttng_live_stream_state orig_state = lttng_live_stream->state;
+ struct packet_index index;
+
+ if (lttng_live_stream->trace->metadata_stream_state ==
+ LTTNG_LIVE_METADATA_STREAM_STATE_NEEDED) {
+ BT_COMP_LOGD(
+ "Need to get an update for the metadata stream before proceeding further with this stream: "
+ "stream-name=\"%s\"",
+ lttng_live_stream->name->str);
+ ret = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE;
+ goto end;
+ }
+
+ if (lttng_live_stream->trace->session->new_streams_needed) {
+ BT_COMP_LOGD(
+ "Need to get an update of all streams before proceeding further with this stream: "
+ "stream-name=\"%s\"",
+ lttng_live_stream->name->str);
+ ret = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE;
+ goto end;
+ }
+
+ if (lttng_live_stream->state != LTTNG_LIVE_STREAM_ACTIVE_NO_DATA &&
+ lttng_live_stream->state != LTTNG_LIVE_STREAM_QUIESCENT_NO_DATA) {
+ goto end;
+ }
+ ret = lttng_live_get_next_index(lttng_live_msg_iter, lttng_live_stream, &index);
+ if (ret != LTTNG_LIVE_ITERATOR_STATUS_OK) {
+ goto end;
+ }
+
+ BT_ASSERT_DBG(lttng_live_stream->state != LTTNG_LIVE_STREAM_EOF);
+
+ if (lttng_live_stream->state == LTTNG_LIVE_STREAM_QUIESCENT) {
+ uint64_t last_inact_ts = lttng_live_stream->last_inactivity_ts.value,
+ curr_inact_ts = lttng_live_stream->current_inactivity_ts;
+
+ if (orig_state == LTTNG_LIVE_STREAM_QUIESCENT_NO_DATA && last_inact_ts == curr_inact_ts) {
+ /*
* Because the stream is in the QUIESCENT_NO_DATA
* state, we can assert that the last_inactivity_ts was
* set and can be safely used in the `if` above.
*/
- BT_ASSERT(lttng_live_stream->last_inactivity_ts.is_set);
-
- ret = LTTNG_LIVE_ITERATOR_STATUS_AGAIN;
- LTTNG_LIVE_LOGD_STREAM_ITER(lttng_live_stream);
- } else {
- ret = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE;
- }
- goto end;
- }
-
- lttng_live_stream->base_offset = index.offset;
- lttng_live_stream->offset = index.offset;
- lttng_live_stream->len = index.packet_size / CHAR_BIT;
-
- BT_COMP_LOGD("Setting live stream reading info: stream-name=\"%s\", "
- "viewer-stream-id=%" PRIu64 ", stream-base-offset=%" PRIu64
- ", stream-offset=%" PRIu64 ", stream-len=%" PRIu64,
- lttng_live_stream->name->str,
- lttng_live_stream->viewer_stream_id,
- lttng_live_stream->base_offset,
- lttng_live_stream->offset, lttng_live_stream->len);
+ BT_ASSERT(lttng_live_stream->last_inactivity_ts.is_set);
+
+ ret = LTTNG_LIVE_ITERATOR_STATUS_AGAIN;
+ LTTNG_LIVE_LOGD_STREAM_ITER(lttng_live_stream);
+ } else {
+ ret = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE;
+ }
+ goto end;
+ }
+
+ lttng_live_stream->base_offset = index.offset;
+ lttng_live_stream->offset = index.offset;
+ lttng_live_stream->len = index.packet_size / CHAR_BIT;
+
+ BT_COMP_LOGD("Setting live stream reading info: stream-name=\"%s\", "
+ "viewer-stream-id=%" PRIu64 ", stream-base-offset=%" PRIu64
+ ", stream-offset=%" PRIu64 ", stream-len=%" PRIu64,
+ lttng_live_stream->name->str, lttng_live_stream->viewer_stream_id,
+ lttng_live_stream->base_offset, lttng_live_stream->offset, lttng_live_stream->len);
end:
- if (ret == LTTNG_LIVE_ITERATOR_STATUS_OK) {
- ret = lttng_live_iterator_next_check_stream_state(lttng_live_stream);
- }
- return ret;
+ if (ret == LTTNG_LIVE_ITERATOR_STATUS_OK) {
+ ret = lttng_live_iterator_next_check_stream_state(lttng_live_stream);
+ }
+ return ret;
}
/*
* (which creates the ctf trace class), and then creating the per-stream
* messages.
*/
-static
-enum lttng_live_iterator_status lttng_live_get_session(
- struct lttng_live_msg_iter *lttng_live_msg_iter,
- struct lttng_live_session *session)
+static enum lttng_live_iterator_status
+lttng_live_get_session(struct lttng_live_msg_iter *lttng_live_msg_iter,
+ struct lttng_live_session *session)
{
- bt_logging_level log_level = lttng_live_msg_iter->log_level;
- bt_self_component *self_comp = lttng_live_msg_iter->self_comp;
- enum lttng_live_iterator_status status;
- uint64_t trace_idx;
-
- if (!session->attached) {
- BT_COMP_LOGD("Attach to session: session-id=%" PRIu64,
- session->id);
- enum lttng_live_viewer_status attach_status =
- lttng_live_session_attach(session,
- lttng_live_msg_iter->self_msg_iter);
- if (attach_status != LTTNG_LIVE_VIEWER_STATUS_OK) {
- if (lttng_live_graph_is_canceled(lttng_live_msg_iter)) {
- /*
- * Clear any causes appended in
- * `lttng_live_attach_session()` as we want to
- * return gracefully since the graph was
- * cancelled.
- */
- bt_current_thread_clear_error();
- status = LTTNG_LIVE_ITERATOR_STATUS_AGAIN;
- } else {
- status = LTTNG_LIVE_ITERATOR_STATUS_ERROR;
- BT_COMP_LOGE_APPEND_CAUSE(self_comp,
- "Error attaching to LTTng live session");
- }
- goto end;
- }
- }
-
- BT_COMP_LOGD("Updating all streams and metadata for session: "
- "session-id=%" PRIu64 ", session-name=\"%s\"",
- session->id, session->session_name->str);
-
- status = lttng_live_session_get_new_streams(session,
- lttng_live_msg_iter->self_msg_iter);
- if (status != LTTNG_LIVE_ITERATOR_STATUS_OK &&
- status != LTTNG_LIVE_ITERATOR_STATUS_END) {
- goto end;
- }
-
- trace_idx = 0;
- while (trace_idx < session->traces->len) {
- struct lttng_live_trace *trace =
- (lttng_live_trace *) g_ptr_array_index(session->traces, trace_idx);
-
- status = lttng_live_metadata_update(trace);
- switch (status) {
- case LTTNG_LIVE_ITERATOR_STATUS_END:
- case LTTNG_LIVE_ITERATOR_STATUS_OK:
- trace_idx++;
- break;
- case LTTNG_LIVE_ITERATOR_STATUS_CONTINUE:
- case LTTNG_LIVE_ITERATOR_STATUS_AGAIN:
- goto end;
- default:
- BT_COMP_LOGE_APPEND_CAUSE(self_comp,
- "Error updating trace metadata: "
- "stream-iter-status=%s, trace-id=%" PRIu64,
- lttng_live_iterator_status_string(status),
- trace->id);
- goto end;
- }
- }
-
- /*
- * Now that we have the metadata we can initialize the downstream
- * iterator.
- */
- status = lttng_live_lazy_msg_init(session,
- lttng_live_msg_iter->self_msg_iter);
+ bt_logging_level log_level = lttng_live_msg_iter->log_level;
+ bt_self_component *self_comp = lttng_live_msg_iter->self_comp;
+ enum lttng_live_iterator_status status;
+ uint64_t trace_idx;
+
+ if (!session->attached) {
+ BT_COMP_LOGD("Attach to session: session-id=%" PRIu64, session->id);
+ enum lttng_live_viewer_status attach_status =
+ lttng_live_session_attach(session, lttng_live_msg_iter->self_msg_iter);
+ if (attach_status != LTTNG_LIVE_VIEWER_STATUS_OK) {
+ if (lttng_live_graph_is_canceled(lttng_live_msg_iter)) {
+ /*
+ * Clear any causes appended in
+ * `lttng_live_attach_session()` as we want to
+ * return gracefully since the graph was
+ * cancelled.
+ */
+ bt_current_thread_clear_error();
+ status = LTTNG_LIVE_ITERATOR_STATUS_AGAIN;
+ } else {
+ status = LTTNG_LIVE_ITERATOR_STATUS_ERROR;
+ BT_COMP_LOGE_APPEND_CAUSE(self_comp, "Error attaching to LTTng live session");
+ }
+ goto end;
+ }
+ }
+
+ BT_COMP_LOGD("Updating all streams and metadata for session: "
+ "session-id=%" PRIu64 ", session-name=\"%s\"",
+ session->id, session->session_name->str);
+
+ status = lttng_live_session_get_new_streams(session, lttng_live_msg_iter->self_msg_iter);
+ if (status != LTTNG_LIVE_ITERATOR_STATUS_OK && status != LTTNG_LIVE_ITERATOR_STATUS_END) {
+ goto end;
+ }
+
+ trace_idx = 0;
+ while (trace_idx < session->traces->len) {
+ struct lttng_live_trace *trace =
+ (lttng_live_trace *) g_ptr_array_index(session->traces, trace_idx);
+
+ status = lttng_live_metadata_update(trace);
+ switch (status) {
+ case LTTNG_LIVE_ITERATOR_STATUS_END:
+ case LTTNG_LIVE_ITERATOR_STATUS_OK:
+ trace_idx++;
+ break;
+ case LTTNG_LIVE_ITERATOR_STATUS_CONTINUE:
+ case LTTNG_LIVE_ITERATOR_STATUS_AGAIN:
+ goto end;
+ default:
+ BT_COMP_LOGE_APPEND_CAUSE(self_comp,
+ "Error updating trace metadata: "
+ "stream-iter-status=%s, trace-id=%" PRIu64,
+ lttng_live_iterator_status_string(status), trace->id);
+ goto end;
+ }
+ }
+
+ /*
+ * Now that we have the metadata we can initialize the downstream
+ * iterator.
+ */
+ status = lttng_live_lazy_msg_init(session, lttng_live_msg_iter->self_msg_iter);
end:
- return status;
+ return status;
}
-static
-void lttng_live_force_new_streams_and_metadata(struct lttng_live_msg_iter *lttng_live_msg_iter)
+static void
+lttng_live_force_new_streams_and_metadata(struct lttng_live_msg_iter *lttng_live_msg_iter)
{
- uint64_t session_idx, trace_idx;
- bt_logging_level log_level = lttng_live_msg_iter->log_level;
- bt_self_component *self_comp = lttng_live_msg_iter->self_comp;
-
- for (session_idx = 0; session_idx < lttng_live_msg_iter->sessions->len;
- session_idx++) {
- struct lttng_live_session *session =
- (lttng_live_session *) g_ptr_array_index(lttng_live_msg_iter->sessions, session_idx);
- BT_COMP_LOGD("Force marking session as needing new streams: "
- "session-id=%" PRIu64, session->id);
- session->new_streams_needed = true;
- for (trace_idx = 0; trace_idx < session->traces->len;
- trace_idx++) {
- struct lttng_live_trace *trace =
- (lttng_live_trace *) g_ptr_array_index(session->traces, trace_idx);
- BT_COMP_LOGD("Force marking trace metadata state as needing an update: "
- "session-id=%" PRIu64 ", trace-id=%" PRIu64,
- session->id, trace->id);
-
- BT_ASSERT(trace->metadata_stream_state !=
- LTTNG_LIVE_METADATA_STREAM_STATE_CLOSED);
-
- trace->metadata_stream_state = LTTNG_LIVE_METADATA_STREAM_STATE_NEEDED;
- }
- }
+ uint64_t session_idx, trace_idx;
+ bt_logging_level log_level = lttng_live_msg_iter->log_level;
+ bt_self_component *self_comp = lttng_live_msg_iter->self_comp;
+
+ for (session_idx = 0; session_idx < lttng_live_msg_iter->sessions->len; session_idx++) {
+ struct lttng_live_session *session =
+ (lttng_live_session *) g_ptr_array_index(lttng_live_msg_iter->sessions, session_idx);
+ BT_COMP_LOGD("Force marking session as needing new streams: "
+ "session-id=%" PRIu64,
+ session->id);
+ session->new_streams_needed = true;
+ for (trace_idx = 0; trace_idx < session->traces->len; trace_idx++) {
+ struct lttng_live_trace *trace =
+ (lttng_live_trace *) g_ptr_array_index(session->traces, trace_idx);
+ BT_COMP_LOGD("Force marking trace metadata state as needing an update: "
+ "session-id=%" PRIu64 ", trace-id=%" PRIu64,
+ session->id, trace->id);
+
+ BT_ASSERT(trace->metadata_stream_state != LTTNG_LIVE_METADATA_STREAM_STATE_CLOSED);
+
+ trace->metadata_stream_state = LTTNG_LIVE_METADATA_STREAM_STATE_NEEDED;
+ }
+ }
}
-static
-enum lttng_live_iterator_status
-lttng_live_iterator_handle_new_streams_and_metadata(
- struct lttng_live_msg_iter *lttng_live_msg_iter)
+static enum lttng_live_iterator_status
+lttng_live_iterator_handle_new_streams_and_metadata(struct lttng_live_msg_iter *lttng_live_msg_iter)
{
- enum lttng_live_iterator_status status;
- enum lttng_live_viewer_status viewer_status;
- bt_logging_level log_level = lttng_live_msg_iter->log_level;
- bt_self_component *self_comp = lttng_live_msg_iter->self_comp;
- uint64_t session_idx = 0, nr_sessions_opened = 0;
- struct lttng_live_session *session;
- enum session_not_found_action sess_not_found_act =
- lttng_live_msg_iter->lttng_live_comp->params.sess_not_found_act;
-
- BT_COMP_LOGD("Update data and metadata of all sessions: "
- "live-msg-iter-addr=%p", lttng_live_msg_iter);
- /*
- * In a remotely distant future, we could add a "new
- * session" flag to the protocol, which would tell us that we
- * need to query for new sessions even though we have sessions
- * currently ongoing.
- */
- if (lttng_live_msg_iter->sessions->len == 0) {
- if (sess_not_found_act != SESSION_NOT_FOUND_ACTION_CONTINUE) {
- BT_COMP_LOGD("No session found. Exiting in accordance with the `session-not-found-action` parameter");
- status = LTTNG_LIVE_ITERATOR_STATUS_END;
- goto end;
- } else {
- BT_COMP_LOGD("No session found. Try creating a new one in accordance with the `session-not-found-action` parameter");
- /*
- * Retry to create a viewer session for the requested
- * session name.
- */
- viewer_status = lttng_live_create_viewer_session(lttng_live_msg_iter);
- if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) {
- if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_ERROR) {
- status = LTTNG_LIVE_ITERATOR_STATUS_ERROR;
- BT_COMP_LOGE_APPEND_CAUSE(self_comp,
- "Error creating LTTng live viewer session");
- } else if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED) {
- status = LTTNG_LIVE_ITERATOR_STATUS_AGAIN;
- } else {
- bt_common_abort();
- }
- goto end;
- }
- }
- }
-
- for (session_idx = 0; session_idx < lttng_live_msg_iter->sessions->len;
- session_idx++) {
- session = (lttng_live_session *) g_ptr_array_index(lttng_live_msg_iter->sessions,
- session_idx);
- status = lttng_live_get_session(lttng_live_msg_iter, session);
- switch (status) {
- case LTTNG_LIVE_ITERATOR_STATUS_OK:
- break;
- case LTTNG_LIVE_ITERATOR_STATUS_END:
- status = LTTNG_LIVE_ITERATOR_STATUS_OK;
- break;
- default:
- goto end;
- }
- if (!session->closed) {
- nr_sessions_opened++;
- }
- }
-
- if (sess_not_found_act != SESSION_NOT_FOUND_ACTION_CONTINUE &&
- nr_sessions_opened == 0) {
- status = LTTNG_LIVE_ITERATOR_STATUS_END;
- } else {
- status = LTTNG_LIVE_ITERATOR_STATUS_OK;
- }
+ enum lttng_live_iterator_status status;
+ enum lttng_live_viewer_status viewer_status;
+ bt_logging_level log_level = lttng_live_msg_iter->log_level;
+ bt_self_component *self_comp = lttng_live_msg_iter->self_comp;
+ uint64_t session_idx = 0, nr_sessions_opened = 0;
+ struct lttng_live_session *session;
+ enum session_not_found_action sess_not_found_act =
+ lttng_live_msg_iter->lttng_live_comp->params.sess_not_found_act;
+
+ BT_COMP_LOGD("Update data and metadata of all sessions: "
+ "live-msg-iter-addr=%p",
+ lttng_live_msg_iter);
+ /*
+ * In a remotely distant future, we could add a "new
+ * session" flag to the protocol, which would tell us that we
+ * need to query for new sessions even though we have sessions
+ * currently ongoing.
+ */
+ if (lttng_live_msg_iter->sessions->len == 0) {
+ if (sess_not_found_act != SESSION_NOT_FOUND_ACTION_CONTINUE) {
+ BT_COMP_LOGD(
+ "No session found. Exiting in accordance with the `session-not-found-action` parameter");
+ status = LTTNG_LIVE_ITERATOR_STATUS_END;
+ goto end;
+ } else {
+ BT_COMP_LOGD(
+ "No session found. Try creating a new one in accordance with the `session-not-found-action` parameter");
+ /*
+ * Retry to create a viewer session for the requested
+ * session name.
+ */
+ viewer_status = lttng_live_create_viewer_session(lttng_live_msg_iter);
+ if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) {
+ if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_ERROR) {
+ status = LTTNG_LIVE_ITERATOR_STATUS_ERROR;
+ BT_COMP_LOGE_APPEND_CAUSE(self_comp,
+ "Error creating LTTng live viewer session");
+ } else if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED) {
+ status = LTTNG_LIVE_ITERATOR_STATUS_AGAIN;
+ } else {
+ bt_common_abort();
+ }
+ goto end;
+ }
+ }
+ }
+
+ for (session_idx = 0; session_idx < lttng_live_msg_iter->sessions->len; session_idx++) {
+ session =
+ (lttng_live_session *) g_ptr_array_index(lttng_live_msg_iter->sessions, session_idx);
+ status = lttng_live_get_session(lttng_live_msg_iter, session);
+ switch (status) {
+ case LTTNG_LIVE_ITERATOR_STATUS_OK:
+ break;
+ case LTTNG_LIVE_ITERATOR_STATUS_END:
+ status = LTTNG_LIVE_ITERATOR_STATUS_OK;
+ break;
+ default:
+ goto end;
+ }
+ if (!session->closed) {
+ nr_sessions_opened++;
+ }
+ }
+
+ if (sess_not_found_act != SESSION_NOT_FOUND_ACTION_CONTINUE && nr_sessions_opened == 0) {
+ status = LTTNG_LIVE_ITERATOR_STATUS_END;
+ } else {
+ status = LTTNG_LIVE_ITERATOR_STATUS_OK;
+ }
end:
- return status;
+ return status;
}
-static
-enum lttng_live_iterator_status emit_inactivity_message(
- struct lttng_live_msg_iter *lttng_live_msg_iter,
- struct lttng_live_stream_iterator *stream_iter,
- const bt_message **message, uint64_t timestamp)
+static enum lttng_live_iterator_status
+emit_inactivity_message(struct lttng_live_msg_iter *lttng_live_msg_iter,
+ struct lttng_live_stream_iterator *stream_iter, const bt_message **message,
+ uint64_t timestamp)
{
- enum lttng_live_iterator_status ret = LTTNG_LIVE_ITERATOR_STATUS_OK;
- bt_logging_level log_level = lttng_live_msg_iter->log_level;
- bt_self_component *self_comp = lttng_live_msg_iter->self_comp;
- bt_message *msg = NULL;
-
- BT_ASSERT(stream_iter->trace->clock_class);
-
- BT_COMP_LOGD("Emitting inactivity message for stream: ctf-stream-id=%" PRIu64
- ", viewer-stream-id=%" PRIu64 ", timestamp=%" PRIu64,
- stream_iter->ctf_stream_class_id.value,
- stream_iter->viewer_stream_id, timestamp);
-
- msg = bt_message_message_iterator_inactivity_create(
- lttng_live_msg_iter->self_msg_iter,
- stream_iter->trace->clock_class, timestamp);
- if (!msg) {
- BT_COMP_LOGE_APPEND_CAUSE(self_comp,
- "Error emitting message iterator inactivity message");
- goto error;
- }
-
- *message = msg;
+ enum lttng_live_iterator_status ret = LTTNG_LIVE_ITERATOR_STATUS_OK;
+ bt_logging_level log_level = lttng_live_msg_iter->log_level;
+ bt_self_component *self_comp = lttng_live_msg_iter->self_comp;
+ bt_message *msg = NULL;
+
+ BT_ASSERT(stream_iter->trace->clock_class);
+
+ BT_COMP_LOGD("Emitting inactivity message for stream: ctf-stream-id=%" PRIu64
+ ", viewer-stream-id=%" PRIu64 ", timestamp=%" PRIu64,
+ stream_iter->ctf_stream_class_id.value, stream_iter->viewer_stream_id, timestamp);
+
+ msg = bt_message_message_iterator_inactivity_create(lttng_live_msg_iter->self_msg_iter,
+ stream_iter->trace->clock_class, timestamp);
+ if (!msg) {
+ BT_COMP_LOGE_APPEND_CAUSE(self_comp, "Error emitting message iterator inactivity message");
+ goto error;
+ }
+
+ *message = msg;
end:
- return ret;
+ return ret;
error:
- ret = LTTNG_LIVE_ITERATOR_STATUS_ERROR;
- bt_message_put_ref(msg);
- goto end;
+ ret = LTTNG_LIVE_ITERATOR_STATUS_ERROR;
+ bt_message_put_ref(msg);
+ goto end;
}
-static
-enum lttng_live_iterator_status lttng_live_iterator_next_handle_one_quiescent_stream(
- struct lttng_live_msg_iter *lttng_live_msg_iter,
- struct lttng_live_stream_iterator *lttng_live_stream,
- const bt_message **message)
+static enum lttng_live_iterator_status lttng_live_iterator_next_handle_one_quiescent_stream(
+ struct lttng_live_msg_iter *lttng_live_msg_iter,
+ struct lttng_live_stream_iterator *lttng_live_stream, const bt_message **message)
{
- enum lttng_live_iterator_status ret = LTTNG_LIVE_ITERATOR_STATUS_OK;
-
- if (lttng_live_stream->state != LTTNG_LIVE_STREAM_QUIESCENT) {
- return LTTNG_LIVE_ITERATOR_STATUS_OK;
- }
-
- /*
- * Check if we already sent an inactivty message downstream for this
- * `current_inactivity_ts` value.
- */
- if (lttng_live_stream->last_inactivity_ts.is_set &&
- lttng_live_stream->current_inactivity_ts ==
- lttng_live_stream->last_inactivity_ts.value) {
- lttng_live_stream_iterator_set_state(lttng_live_stream,
- LTTNG_LIVE_STREAM_QUIESCENT_NO_DATA);
-
- ret = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE;
- goto end;
- }
-
- ret = emit_inactivity_message(lttng_live_msg_iter, lttng_live_stream,
- message, lttng_live_stream->current_inactivity_ts);
-
- lttng_live_stream->last_inactivity_ts.value =
- lttng_live_stream->current_inactivity_ts;
- lttng_live_stream->last_inactivity_ts.is_set = true;
+ enum lttng_live_iterator_status ret = LTTNG_LIVE_ITERATOR_STATUS_OK;
+
+ if (lttng_live_stream->state != LTTNG_LIVE_STREAM_QUIESCENT) {
+ return LTTNG_LIVE_ITERATOR_STATUS_OK;
+ }
+
+ /*
+ * Check if we already sent an inactivty message downstream for this
+ * `current_inactivity_ts` value.
+ */
+ if (lttng_live_stream->last_inactivity_ts.is_set &&
+ lttng_live_stream->current_inactivity_ts == lttng_live_stream->last_inactivity_ts.value) {
+ lttng_live_stream_iterator_set_state(lttng_live_stream,
+ LTTNG_LIVE_STREAM_QUIESCENT_NO_DATA);
+
+ ret = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE;
+ goto end;
+ }
+
+ ret = emit_inactivity_message(lttng_live_msg_iter, lttng_live_stream, message,
+ lttng_live_stream->current_inactivity_ts);
+
+ lttng_live_stream->last_inactivity_ts.value = lttng_live_stream->current_inactivity_ts;
+ lttng_live_stream->last_inactivity_ts.is_set = true;
end:
- return ret;
+ return ret;
}
-static
-int live_get_msg_ts_ns(struct lttng_live_stream_iterator *stream_iter,
- struct lttng_live_msg_iter *lttng_live_msg_iter,
- const bt_message *msg, int64_t last_msg_ts_ns,
- int64_t *ts_ns)
+static int live_get_msg_ts_ns(struct lttng_live_stream_iterator *stream_iter,
+ struct lttng_live_msg_iter *lttng_live_msg_iter,
+ const bt_message *msg, int64_t last_msg_ts_ns, int64_t *ts_ns)
{
- const bt_clock_class *clock_class = NULL;
- const bt_clock_snapshot *clock_snapshot = NULL;
- int ret = 0;
- bt_logging_level log_level = lttng_live_msg_iter->log_level;
- bt_self_component *self_comp = lttng_live_msg_iter->self_comp;
-
- BT_ASSERT_DBG(msg);
- BT_ASSERT_DBG(ts_ns);
-
- BT_COMP_LOGD("Getting message's timestamp: iter-data-addr=%p, msg-addr=%p, "
- "last-msg-ts=%" PRId64, lttng_live_msg_iter, msg,
- last_msg_ts_ns);
-
- switch (bt_message_get_type(msg)) {
- case BT_MESSAGE_TYPE_EVENT:
- clock_class = bt_message_event_borrow_stream_class_default_clock_class_const(
- msg);
- BT_ASSERT_DBG(clock_class);
-
- clock_snapshot = bt_message_event_borrow_default_clock_snapshot_const(
- msg);
- break;
- case BT_MESSAGE_TYPE_PACKET_BEGINNING:
- clock_class = bt_message_packet_beginning_borrow_stream_class_default_clock_class_const(
- msg);
- BT_ASSERT(clock_class);
-
- clock_snapshot = bt_message_packet_beginning_borrow_default_clock_snapshot_const(
- msg);
- break;
- case BT_MESSAGE_TYPE_PACKET_END:
- clock_class = bt_message_packet_end_borrow_stream_class_default_clock_class_const(
- msg);
- BT_ASSERT(clock_class);
-
- clock_snapshot = bt_message_packet_end_borrow_default_clock_snapshot_const(
- msg);
- break;
- case BT_MESSAGE_TYPE_DISCARDED_EVENTS:
- clock_class = bt_message_discarded_events_borrow_stream_class_default_clock_class_const(
- msg);
- BT_ASSERT(clock_class);
-
- clock_snapshot = bt_message_discarded_events_borrow_beginning_default_clock_snapshot_const(
- msg);
- break;
- case BT_MESSAGE_TYPE_DISCARDED_PACKETS:
- clock_class = bt_message_discarded_packets_borrow_stream_class_default_clock_class_const(
- msg);
- BT_ASSERT(clock_class);
-
- clock_snapshot = bt_message_discarded_packets_borrow_beginning_default_clock_snapshot_const(
- msg);
- break;
- case BT_MESSAGE_TYPE_MESSAGE_ITERATOR_INACTIVITY:
- clock_snapshot = bt_message_message_iterator_inactivity_borrow_clock_snapshot_const(
- msg);
- break;
- default:
- /* All the other messages have a higher priority */
- BT_COMP_LOGD_STR("Message has no timestamp: using the last message timestamp.");
- *ts_ns = last_msg_ts_ns;
- goto end;
- }
-
- clock_class = bt_clock_snapshot_borrow_clock_class_const(clock_snapshot);
- BT_ASSERT_DBG(clock_class);
-
- ret = bt_clock_snapshot_get_ns_from_origin(clock_snapshot, ts_ns);
- if (ret) {
- BT_COMP_LOGE_APPEND_CAUSE(self_comp,
- "Cannot get nanoseconds from Epoch of clock snapshot: "
- "clock-snapshot-addr=%p", clock_snapshot);
- goto error;
- }
-
- goto end;
+ const bt_clock_class *clock_class = NULL;
+ const bt_clock_snapshot *clock_snapshot = NULL;
+ int ret = 0;
+ bt_logging_level log_level = lttng_live_msg_iter->log_level;
+ bt_self_component *self_comp = lttng_live_msg_iter->self_comp;
+
+ BT_ASSERT_DBG(msg);
+ BT_ASSERT_DBG(ts_ns);
+
+ BT_COMP_LOGD("Getting message's timestamp: iter-data-addr=%p, msg-addr=%p, "
+ "last-msg-ts=%" PRId64,
+ lttng_live_msg_iter, msg, last_msg_ts_ns);
+
+ switch (bt_message_get_type(msg)) {
+ case BT_MESSAGE_TYPE_EVENT:
+ clock_class = bt_message_event_borrow_stream_class_default_clock_class_const(msg);
+ BT_ASSERT_DBG(clock_class);
+
+ clock_snapshot = bt_message_event_borrow_default_clock_snapshot_const(msg);
+ break;
+ case BT_MESSAGE_TYPE_PACKET_BEGINNING:
+ clock_class =
+ bt_message_packet_beginning_borrow_stream_class_default_clock_class_const(msg);
+ BT_ASSERT(clock_class);
+
+ clock_snapshot = bt_message_packet_beginning_borrow_default_clock_snapshot_const(msg);
+ break;
+ case BT_MESSAGE_TYPE_PACKET_END:
+ clock_class = bt_message_packet_end_borrow_stream_class_default_clock_class_const(msg);
+ BT_ASSERT(clock_class);
+
+ clock_snapshot = bt_message_packet_end_borrow_default_clock_snapshot_const(msg);
+ break;
+ case BT_MESSAGE_TYPE_DISCARDED_EVENTS:
+ clock_class =
+ bt_message_discarded_events_borrow_stream_class_default_clock_class_const(msg);
+ BT_ASSERT(clock_class);
+
+ clock_snapshot =
+ bt_message_discarded_events_borrow_beginning_default_clock_snapshot_const(msg);
+ break;
+ case BT_MESSAGE_TYPE_DISCARDED_PACKETS:
+ clock_class =
+ bt_message_discarded_packets_borrow_stream_class_default_clock_class_const(msg);
+ BT_ASSERT(clock_class);
+
+ clock_snapshot =
+ bt_message_discarded_packets_borrow_beginning_default_clock_snapshot_const(msg);
+ break;
+ case BT_MESSAGE_TYPE_MESSAGE_ITERATOR_INACTIVITY:
+ clock_snapshot = bt_message_message_iterator_inactivity_borrow_clock_snapshot_const(msg);
+ break;
+ default:
+ /* All the other messages have a higher priority */
+ BT_COMP_LOGD_STR("Message has no timestamp: using the last message timestamp.");
+ *ts_ns = last_msg_ts_ns;
+ goto end;
+ }
+
+ clock_class = bt_clock_snapshot_borrow_clock_class_const(clock_snapshot);
+ BT_ASSERT_DBG(clock_class);
+
+ ret = bt_clock_snapshot_get_ns_from_origin(clock_snapshot, ts_ns);
+ if (ret) {
+ BT_COMP_LOGE_APPEND_CAUSE(self_comp,
+ "Cannot get nanoseconds from Epoch of clock snapshot: "
+ "clock-snapshot-addr=%p",
+ clock_snapshot);
+ goto error;
+ }
+
+ goto end;
error:
- ret = -1;
+ ret = -1;
end:
- if (ret == 0) {
- BT_COMP_LOGD("Found message's timestamp: "
- "iter-data-addr=%p, msg-addr=%p, "
- "last-msg-ts=%" PRId64 ", ts=%" PRId64,
- lttng_live_msg_iter, msg, last_msg_ts_ns, *ts_ns);
- }
-
- return ret;
+ if (ret == 0) {
+ BT_COMP_LOGD("Found message's timestamp: "
+ "iter-data-addr=%p, msg-addr=%p, "
+ "last-msg-ts=%" PRId64 ", ts=%" PRId64,
+ lttng_live_msg_iter, msg, last_msg_ts_ns, *ts_ns);
+ }
+
+ return ret;
}
-static
-enum lttng_live_iterator_status lttng_live_iterator_next_handle_one_active_data_stream(
- struct lttng_live_msg_iter *lttng_live_msg_iter,
- struct lttng_live_stream_iterator *lttng_live_stream,
- const bt_message **message)
+static enum lttng_live_iterator_status lttng_live_iterator_next_handle_one_active_data_stream(
+ struct lttng_live_msg_iter *lttng_live_msg_iter,
+ struct lttng_live_stream_iterator *lttng_live_stream, const bt_message **message)
{
- enum lttng_live_iterator_status ret = LTTNG_LIVE_ITERATOR_STATUS_OK;
- bt_logging_level log_level = lttng_live_msg_iter->log_level;
- bt_self_component *self_comp = lttng_live_msg_iter->self_comp;
- enum ctf_msg_iter_status status;
- uint64_t session_idx, trace_idx;
-
- for (session_idx = 0; session_idx < lttng_live_msg_iter->sessions->len;
- session_idx++) {
- struct lttng_live_session *session =
- (lttng_live_session *) g_ptr_array_index(lttng_live_msg_iter->sessions, session_idx);
-
- if (session->new_streams_needed) {
- BT_COMP_LOGD("Need an update for streams: "
- "session-id=%" PRIu64, session->id);
- ret = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE;
- goto end;
- }
- for (trace_idx = 0; trace_idx < session->traces->len;
- trace_idx++) {
- struct lttng_live_trace *trace =
- (lttng_live_trace *) g_ptr_array_index(session->traces, trace_idx);
- if (trace->metadata_stream_state == LTTNG_LIVE_METADATA_STREAM_STATE_NEEDED) {
- BT_COMP_LOGD("Need an update for metadata stream: "
- "session-id=%" PRIu64 ", trace-id=%" PRIu64,
- session->id, trace->id);
- ret = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE;
- goto end;
- }
- }
- }
-
- if (lttng_live_stream->state != LTTNG_LIVE_STREAM_ACTIVE_DATA) {
- ret = LTTNG_LIVE_ITERATOR_STATUS_ERROR;
- BT_COMP_LOGE_APPEND_CAUSE(self_comp,
- "Invalid state of live stream iterator"
- "stream-iter-status=%s",
- lttng_live_stream_state_string(lttng_live_stream->state));
- goto end;
- }
-
- status = ctf_msg_iter_get_next_message(
- lttng_live_stream->msg_iter, message);
- switch (status) {
- case CTF_MSG_ITER_STATUS_EOF:
- ret = LTTNG_LIVE_ITERATOR_STATUS_END;
- break;
- case CTF_MSG_ITER_STATUS_OK:
- ret = LTTNG_LIVE_ITERATOR_STATUS_OK;
- break;
- case CTF_MSG_ITER_STATUS_AGAIN:
- /*
- * Continue immediately (end of packet). The next
- * get_index may return AGAIN to delay the following
- * attempt.
- */
- ret = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE;
- break;
- case CTF_MSG_ITER_STATUS_ERROR:
- default:
- ret = LTTNG_LIVE_ITERATOR_STATUS_ERROR;
- BT_COMP_LOGE_APPEND_CAUSE(self_comp,
- "CTF message iterator failed to get next message: "
- "msg-iter=%p, msg-iter-status=%s",
- lttng_live_stream->msg_iter,
- ctf_msg_iter_status_string(status));
- break;
- }
+ enum lttng_live_iterator_status ret = LTTNG_LIVE_ITERATOR_STATUS_OK;
+ bt_logging_level log_level = lttng_live_msg_iter->log_level;
+ bt_self_component *self_comp = lttng_live_msg_iter->self_comp;
+ enum ctf_msg_iter_status status;
+ uint64_t session_idx, trace_idx;
+
+ for (session_idx = 0; session_idx < lttng_live_msg_iter->sessions->len; session_idx++) {
+ struct lttng_live_session *session =
+ (lttng_live_session *) g_ptr_array_index(lttng_live_msg_iter->sessions, session_idx);
+
+ if (session->new_streams_needed) {
+ BT_COMP_LOGD("Need an update for streams: "
+ "session-id=%" PRIu64,
+ session->id);
+ ret = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE;
+ goto end;
+ }
+ for (trace_idx = 0; trace_idx < session->traces->len; trace_idx++) {
+ struct lttng_live_trace *trace =
+ (lttng_live_trace *) g_ptr_array_index(session->traces, trace_idx);
+ if (trace->metadata_stream_state == LTTNG_LIVE_METADATA_STREAM_STATE_NEEDED) {
+ BT_COMP_LOGD("Need an update for metadata stream: "
+ "session-id=%" PRIu64 ", trace-id=%" PRIu64,
+ session->id, trace->id);
+ ret = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE;
+ goto end;
+ }
+ }
+ }
+
+ if (lttng_live_stream->state != LTTNG_LIVE_STREAM_ACTIVE_DATA) {
+ ret = LTTNG_LIVE_ITERATOR_STATUS_ERROR;
+ BT_COMP_LOGE_APPEND_CAUSE(self_comp,
+ "Invalid state of live stream iterator"
+ "stream-iter-status=%s",
+ lttng_live_stream_state_string(lttng_live_stream->state));
+ goto end;
+ }
+
+ status = ctf_msg_iter_get_next_message(lttng_live_stream->msg_iter, message);
+ switch (status) {
+ case CTF_MSG_ITER_STATUS_EOF:
+ ret = LTTNG_LIVE_ITERATOR_STATUS_END;
+ break;
+ case CTF_MSG_ITER_STATUS_OK:
+ ret = LTTNG_LIVE_ITERATOR_STATUS_OK;
+ break;
+ case CTF_MSG_ITER_STATUS_AGAIN:
+ /*
+ * Continue immediately (end of packet). The next
+ * get_index may return AGAIN to delay the following
+ * attempt.
+ */
+ ret = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE;
+ break;
+ case CTF_MSG_ITER_STATUS_ERROR:
+ default:
+ ret = LTTNG_LIVE_ITERATOR_STATUS_ERROR;
+ BT_COMP_LOGE_APPEND_CAUSE(self_comp,
+ "CTF message iterator failed to get next message: "
+ "msg-iter=%p, msg-iter-status=%s",
+ lttng_live_stream->msg_iter, ctf_msg_iter_status_string(status));
+ break;
+ }
end:
- return ret;
+ return ret;
}
-static
-enum lttng_live_iterator_status lttng_live_iterator_close_stream(
- struct lttng_live_msg_iter *lttng_live_msg_iter,
- struct lttng_live_stream_iterator *stream_iter,
- const bt_message **curr_msg)
+static enum lttng_live_iterator_status
+lttng_live_iterator_close_stream(struct lttng_live_msg_iter *lttng_live_msg_iter,
+ struct lttng_live_stream_iterator *stream_iter,
+ const bt_message **curr_msg)
{
- enum lttng_live_iterator_status live_status =
- LTTNG_LIVE_ITERATOR_STATUS_OK;
- bt_logging_level log_level = lttng_live_msg_iter->log_level;
- bt_self_component *self_comp = lttng_live_msg_iter->self_comp;
-
- BT_COMP_LOGD("Closing live stream iterator: stream-name=\"%s\", "
- "viewer-stream-id=%" PRIu64, stream_iter->name->str,
- stream_iter->viewer_stream_id);
-
- /*
- * The viewer has hung up on us so we are closing the stream. The
- * `ctf_msg_iter` should simply realize that it needs to close the
- * stream properly by emitting the necessary stream end message.
- */
- enum ctf_msg_iter_status status = ctf_msg_iter_get_next_message(
- stream_iter->msg_iter, curr_msg);
-
- if (status == CTF_MSG_ITER_STATUS_ERROR) {
- BT_COMP_LOGE_APPEND_CAUSE(self_comp,
- "Error getting the next message from CTF message iterator");
- live_status = LTTNG_LIVE_ITERATOR_STATUS_ERROR;
- goto end;
- } else if (status == CTF_MSG_ITER_STATUS_EOF) {
- BT_COMP_LOGI("Reached the end of the live stream iterator.");
- live_status = LTTNG_LIVE_ITERATOR_STATUS_END;
- goto end;
- }
-
- BT_ASSERT(status == CTF_MSG_ITER_STATUS_OK);
+ enum lttng_live_iterator_status live_status = LTTNG_LIVE_ITERATOR_STATUS_OK;
+ bt_logging_level log_level = lttng_live_msg_iter->log_level;
+ bt_self_component *self_comp = lttng_live_msg_iter->self_comp;
+
+ BT_COMP_LOGD("Closing live stream iterator: stream-name=\"%s\", "
+ "viewer-stream-id=%" PRIu64,
+ stream_iter->name->str, stream_iter->viewer_stream_id);
+
+ /*
+ * The viewer has hung up on us so we are closing the stream. The
+ * `ctf_msg_iter` should simply realize that it needs to close the
+ * stream properly by emitting the necessary stream end message.
+ */
+ enum ctf_msg_iter_status status =
+ ctf_msg_iter_get_next_message(stream_iter->msg_iter, curr_msg);
+
+ if (status == CTF_MSG_ITER_STATUS_ERROR) {
+ BT_COMP_LOGE_APPEND_CAUSE(self_comp,
+ "Error getting the next message from CTF message iterator");
+ live_status = LTTNG_LIVE_ITERATOR_STATUS_ERROR;
+ goto end;
+ } else if (status == CTF_MSG_ITER_STATUS_EOF) {
+ BT_COMP_LOGI("Reached the end of the live stream iterator.");
+ live_status = LTTNG_LIVE_ITERATOR_STATUS_END;
+ goto end;
+ }
+
+ BT_ASSERT(status == CTF_MSG_ITER_STATUS_OK);
end:
- return live_status;
+ return live_status;
}
/*
*
* When disconnected from relayd: try to re-connect endlessly.
*/
-static
-enum lttng_live_iterator_status lttng_live_iterator_next_msg_on_stream(
- struct lttng_live_msg_iter *lttng_live_msg_iter,
- struct lttng_live_stream_iterator *stream_iter,
- const bt_message **curr_msg)
+static enum lttng_live_iterator_status
+lttng_live_iterator_next_msg_on_stream(struct lttng_live_msg_iter *lttng_live_msg_iter,
+ struct lttng_live_stream_iterator *stream_iter,
+ const bt_message **curr_msg)
{
- bt_logging_level log_level = lttng_live_msg_iter->log_level;
- bt_self_component *self_comp = lttng_live_msg_iter->self_comp;
- enum lttng_live_iterator_status live_status;
-
- BT_COMP_LOGD("Advancing live stream iterator until next message if possible: "
- "stream-name=\"%s\", viewer-stream-id=%" PRIu64,
- stream_iter->name->str, stream_iter->viewer_stream_id);
-
- if (stream_iter->has_stream_hung_up) {
- /*
- * The stream has hung up and the stream was properly closed
- * during the last call to the current function. Return _END
- * status now so that this stream iterator is removed for the
- * stream iterator list.
- */
- live_status = LTTNG_LIVE_ITERATOR_STATUS_END;
- goto end;
- }
+ bt_logging_level log_level = lttng_live_msg_iter->log_level;
+ bt_self_component *self_comp = lttng_live_msg_iter->self_comp;
+ enum lttng_live_iterator_status live_status;
+
+ BT_COMP_LOGD("Advancing live stream iterator until next message if possible: "
+ "stream-name=\"%s\", viewer-stream-id=%" PRIu64,
+ stream_iter->name->str, stream_iter->viewer_stream_id);
+
+ if (stream_iter->has_stream_hung_up) {
+ /*
+ * The stream has hung up and the stream was properly closed
+ * during the last call to the current function. Return _END
+ * status now so that this stream iterator is removed for the
+ * stream iterator list.
+ */
+ live_status = LTTNG_LIVE_ITERATOR_STATUS_END;
+ goto end;
+ }
retry:
- LTTNG_LIVE_LOGD_STREAM_ITER(stream_iter);
-
- /*
- * Make sure we have the most recent metadata and possibly some new
- * streams.
- */
- live_status = lttng_live_iterator_handle_new_streams_and_metadata(
- lttng_live_msg_iter);
- if (live_status != LTTNG_LIVE_ITERATOR_STATUS_OK) {
- goto end;
- }
-
- live_status = lttng_live_iterator_next_handle_one_no_data_stream(
- lttng_live_msg_iter, stream_iter);
- if (live_status != LTTNG_LIVE_ITERATOR_STATUS_OK) {
- if (live_status == LTTNG_LIVE_ITERATOR_STATUS_END) {
- /*
- * We overwrite `live_status` since `curr_msg` is
- * likely set to a valid message in this function.
- */
- live_status = lttng_live_iterator_close_stream(
- lttng_live_msg_iter, stream_iter, curr_msg);
- }
- goto end;
- }
-
- live_status = lttng_live_iterator_next_handle_one_quiescent_stream(
- lttng_live_msg_iter, stream_iter, curr_msg);
- if (live_status != LTTNG_LIVE_ITERATOR_STATUS_OK) {
- BT_ASSERT(!*curr_msg);
- goto end;
- }
- if (*curr_msg) {
- goto end;
- }
- live_status = lttng_live_iterator_next_handle_one_active_data_stream(
- lttng_live_msg_iter, stream_iter, curr_msg);
- if (live_status != LTTNG_LIVE_ITERATOR_STATUS_OK) {
- BT_ASSERT(!*curr_msg);
- }
+ LTTNG_LIVE_LOGD_STREAM_ITER(stream_iter);
+
+ /*
+ * Make sure we have the most recent metadata and possibly some new
+ * streams.
+ */
+ live_status = lttng_live_iterator_handle_new_streams_and_metadata(lttng_live_msg_iter);
+ if (live_status != LTTNG_LIVE_ITERATOR_STATUS_OK) {
+ goto end;
+ }
+
+ live_status =
+ lttng_live_iterator_next_handle_one_no_data_stream(lttng_live_msg_iter, stream_iter);
+ if (live_status != LTTNG_LIVE_ITERATOR_STATUS_OK) {
+ if (live_status == LTTNG_LIVE_ITERATOR_STATUS_END) {
+ /*
+ * We overwrite `live_status` since `curr_msg` is
+ * likely set to a valid message in this function.
+ */
+ live_status =
+ lttng_live_iterator_close_stream(lttng_live_msg_iter, stream_iter, curr_msg);
+ }
+ goto end;
+ }
+
+ live_status = lttng_live_iterator_next_handle_one_quiescent_stream(lttng_live_msg_iter,
+ stream_iter, curr_msg);
+ if (live_status != LTTNG_LIVE_ITERATOR_STATUS_OK) {
+ BT_ASSERT(!*curr_msg);
+ goto end;
+ }
+ if (*curr_msg) {
+ goto end;
+ }
+ live_status = lttng_live_iterator_next_handle_one_active_data_stream(lttng_live_msg_iter,
+ stream_iter, curr_msg);
+ if (live_status != LTTNG_LIVE_ITERATOR_STATUS_OK) {
+ BT_ASSERT(!*curr_msg);
+ }
end:
- if (live_status == LTTNG_LIVE_ITERATOR_STATUS_CONTINUE) {
- BT_COMP_LOGD("Ask the relay daemon for an updated view of the data and metadata streams");
- goto retry;
- }
+ if (live_status == LTTNG_LIVE_ITERATOR_STATUS_CONTINUE) {
+ BT_COMP_LOGD("Ask the relay daemon for an updated view of the data and metadata streams");
+ goto retry;
+ }
- BT_COMP_LOGD("Returning from advancing live stream iterator: status=%s, "
- "stream-name=\"%s\", viewer-stream-id=%" PRIu64,
- lttng_live_iterator_status_string(live_status),
- stream_iter->name->str, stream_iter->viewer_stream_id);
+ BT_COMP_LOGD("Returning from advancing live stream iterator: status=%s, "
+ "stream-name=\"%s\", viewer-stream-id=%" PRIu64,
+ lttng_live_iterator_status_string(live_status), stream_iter->name->str,
+ stream_iter->viewer_stream_id);
- return live_status;
+ return live_status;
}
-static
-bool is_discarded_packet_or_event_message(const bt_message *msg)
+static bool is_discarded_packet_or_event_message(const bt_message *msg)
{
- const enum bt_message_type msg_type = bt_message_get_type(msg);
+ const enum bt_message_type msg_type = bt_message_get_type(msg);
- return msg_type == BT_MESSAGE_TYPE_DISCARDED_EVENTS ||
- msg_type == BT_MESSAGE_TYPE_DISCARDED_PACKETS;
+ return msg_type == BT_MESSAGE_TYPE_DISCARDED_EVENTS ||
+ msg_type == BT_MESSAGE_TYPE_DISCARDED_PACKETS;
}
-static
-enum lttng_live_iterator_status adjust_discarded_packets_message(
- bt_self_message_iterator *iter,
- const bt_stream *stream,
- const bt_message *msg_in, bt_message **msg_out,
- uint64_t new_begin_ts)
+static enum lttng_live_iterator_status
+adjust_discarded_packets_message(bt_self_message_iterator *iter, const bt_stream *stream,
+ const bt_message *msg_in, bt_message **msg_out,
+ uint64_t new_begin_ts)
{
- enum lttng_live_iterator_status status = LTTNG_LIVE_ITERATOR_STATUS_OK;
- enum bt_property_availability availability;
- const bt_clock_snapshot *clock_snapshot;
- uint64_t end_ts;
- uint64_t count;
-
- clock_snapshot = bt_message_discarded_packets_borrow_end_default_clock_snapshot_const(msg_in);
- end_ts = bt_clock_snapshot_get_value(clock_snapshot);
-
- availability = bt_message_discarded_packets_get_count(msg_in, &count);
- BT_ASSERT_DBG(availability == BT_PROPERTY_AVAILABILITY_AVAILABLE);
-
- *msg_out = bt_message_discarded_packets_create_with_default_clock_snapshots(
- iter, stream, new_begin_ts, end_ts);
- if (!*msg_out) {
- status = LTTNG_LIVE_ITERATOR_STATUS_NOMEM;
- goto end;
- }
-
- bt_message_discarded_packets_set_count(*msg_out, count);
+ enum lttng_live_iterator_status status = LTTNG_LIVE_ITERATOR_STATUS_OK;
+ enum bt_property_availability availability;
+ const bt_clock_snapshot *clock_snapshot;
+ uint64_t end_ts;
+ uint64_t count;
+
+ clock_snapshot = bt_message_discarded_packets_borrow_end_default_clock_snapshot_const(msg_in);
+ end_ts = bt_clock_snapshot_get_value(clock_snapshot);
+
+ availability = bt_message_discarded_packets_get_count(msg_in, &count);
+ BT_ASSERT_DBG(availability == BT_PROPERTY_AVAILABILITY_AVAILABLE);
+
+ *msg_out = bt_message_discarded_packets_create_with_default_clock_snapshots(
+ iter, stream, new_begin_ts, end_ts);
+ if (!*msg_out) {
+ status = LTTNG_LIVE_ITERATOR_STATUS_NOMEM;
+ goto end;
+ }
+
+ bt_message_discarded_packets_set_count(*msg_out, count);
end:
- return status;
+ return status;
}
-static
-enum lttng_live_iterator_status adjust_discarded_events_message(
- bt_self_message_iterator *iter,
- const bt_stream *stream,
- const bt_message *msg_in, bt_message **msg_out,
- uint64_t new_begin_ts)
+static enum lttng_live_iterator_status
+adjust_discarded_events_message(bt_self_message_iterator *iter, const bt_stream *stream,
+ const bt_message *msg_in, bt_message **msg_out,
+ uint64_t new_begin_ts)
{
- enum lttng_live_iterator_status status = LTTNG_LIVE_ITERATOR_STATUS_OK;
- enum bt_property_availability availability;
- const bt_clock_snapshot *clock_snapshot;
- uint64_t end_ts;
- uint64_t count;
-
- clock_snapshot = bt_message_discarded_events_borrow_end_default_clock_snapshot_const(msg_in);
- end_ts = bt_clock_snapshot_get_value(clock_snapshot);
-
- availability = bt_message_discarded_events_get_count(msg_in, &count);
- BT_ASSERT_DBG(availability == BT_PROPERTY_AVAILABILITY_AVAILABLE);
-
- *msg_out = bt_message_discarded_events_create_with_default_clock_snapshots(
- iter, stream, new_begin_ts, end_ts);
- if (!*msg_out) {
- status = LTTNG_LIVE_ITERATOR_STATUS_NOMEM;
- goto end;
- }
-
- bt_message_discarded_events_set_count(*msg_out, count);
+ enum lttng_live_iterator_status status = LTTNG_LIVE_ITERATOR_STATUS_OK;
+ enum bt_property_availability availability;
+ const bt_clock_snapshot *clock_snapshot;
+ uint64_t end_ts;
+ uint64_t count;
+
+ clock_snapshot = bt_message_discarded_events_borrow_end_default_clock_snapshot_const(msg_in);
+ end_ts = bt_clock_snapshot_get_value(clock_snapshot);
+
+ availability = bt_message_discarded_events_get_count(msg_in, &count);
+ BT_ASSERT_DBG(availability == BT_PROPERTY_AVAILABILITY_AVAILABLE);
+
+ *msg_out = bt_message_discarded_events_create_with_default_clock_snapshots(
+ iter, stream, new_begin_ts, end_ts);
+ if (!*msg_out) {
+ status = LTTNG_LIVE_ITERATOR_STATUS_NOMEM;
+ goto end;
+ }
+
+ bt_message_discarded_events_set_count(*msg_out, count);
end:
- return status;
+ return status;
}
-static
-enum lttng_live_iterator_status handle_late_message(
- struct lttng_live_msg_iter *lttng_live_msg_iter,
- struct lttng_live_stream_iterator *stream_iter,
- int64_t late_msg_ts_ns, const bt_message *late_msg)
+static enum lttng_live_iterator_status
+handle_late_message(struct lttng_live_msg_iter *lttng_live_msg_iter,
+ struct lttng_live_stream_iterator *stream_iter, int64_t late_msg_ts_ns,
+ const bt_message *late_msg)
{
- bt_self_component *self_comp = lttng_live_msg_iter->self_comp;
- bt_logging_level log_level = lttng_live_msg_iter->log_level;
- const bt_clock_class *clock_class;
- const bt_stream_class *stream_class;
- enum bt_clock_class_cycles_to_ns_from_origin_status ts_ns_status;
- int64_t last_inactivity_ts_ns;
- enum lttng_live_iterator_status stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_OK;
- enum lttng_live_iterator_status adjust_status;
- bt_message *adjusted_message;
-
- /*
- * The timestamp of the current message is before the last message sent
- * by this component. We CANNOT send it as is.
- *
- * The only expected scenario in which that could happen is the
- * following, everything else is a bug in this component, relay deamon,
- * or CTF parser.
- *
- * Expected scenario: The CTF message iterator emitted discarded
- * packets and discarded events with synthesized beginning and end
- * timestamps from the bounds of the last known packet and the newly
- * decoded packet header. The CTF message iterator is not aware of
- * stream inactivity beacons. Hence, we have to adjust the beginning
- * timestamp of those types of messages if a stream signalled its
- * inactivity up until _after_ the last known packet's beginning
- * timestamp.
- *
- * Otherwise, the monotonicity guarantee of message timestamps would
- * not be preserved.
- *
- * In short, the only scenario in which it's okay and fixable to
- * received a late message is when:
- * 1. the late message is a discarded packets or discarded events
- * message,
- * 2. this stream produced an inactivity message downstream, and
- * 3. the timestamp of the late message is within the inactivity
- * timespan we sent downstream through the inactivity message.
- */
-
- BT_COMP_LOGD("Handling late message on live stream iterator: "
- "stream-name=\"%s\", viewer-stream-id=%" PRIu64,
- stream_iter->name->str, stream_iter->viewer_stream_id);
-
- if (!stream_iter->last_inactivity_ts.is_set) {
- BT_COMP_LOGE_APPEND_CAUSE(self_comp, "Invalid live stream state: "
- "have a late message when no inactivity message "
- "was ever sent for that stream.");
- stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_ERROR;
- goto end;
- }
-
- if (!is_discarded_packet_or_event_message(late_msg)) {
- BT_COMP_LOGE_APPEND_CAUSE(self_comp, "Invalid live stream state: "
- "have a late message that is not a packet discarded or "
- "event discarded message: late-msg-type=%s",
- bt_common_message_type_string(bt_message_get_type(late_msg)));
- stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_ERROR;
- goto end;
- }
-
- stream_class = bt_stream_borrow_class_const(stream_iter->stream);
- clock_class = bt_stream_class_borrow_default_clock_class_const(stream_class);
-
- ts_ns_status = bt_clock_class_cycles_to_ns_from_origin(clock_class,
- stream_iter->last_inactivity_ts.value, &last_inactivity_ts_ns);
- if (ts_ns_status != BT_CLOCK_CLASS_CYCLES_TO_NS_FROM_ORIGIN_STATUS_OK) {
- BT_COMP_LOGE_APPEND_CAUSE(self_comp,"Error converting last "
- "inactivity message timestamp to nanoseconds");
- stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_ERROR;
- goto end;
- }
-
- if (last_inactivity_ts_ns <= late_msg_ts_ns) {
- BT_COMP_LOGE_APPEND_CAUSE(self_comp, "Invalid live stream state: "
- "have a late message that is none included in a stream "
- "inactivity timespan: last-inactivity-ts-ns=%" PRIu64
- "late-msg-ts-ns=%" PRIu64, last_inactivity_ts_ns, late_msg_ts_ns);
- stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_ERROR;
- goto end;
- }
-
- /*
- * We now know that it's okay for this message to be late, we can now
- * adjust its timestamp to ensure monotonicity.
- */
- BT_COMP_LOGD("Adjusting the timestamp of late message: late-msg-type=%s, "
- "msg-new-ts-ns=%" PRIu64,
- bt_common_message_type_string(bt_message_get_type(late_msg)),
- stream_iter->last_inactivity_ts.value);
- switch (bt_message_get_type(late_msg)) {
- case BT_MESSAGE_TYPE_DISCARDED_EVENTS:
- adjust_status = adjust_discarded_events_message(
- lttng_live_msg_iter->self_msg_iter,
- stream_iter->stream,
- late_msg, &adjusted_message,
- stream_iter->last_inactivity_ts.value);
- break;
- case BT_MESSAGE_TYPE_DISCARDED_PACKETS:
- adjust_status = adjust_discarded_packets_message(
- lttng_live_msg_iter->self_msg_iter,
- stream_iter->stream,
- late_msg, &adjusted_message,
- stream_iter->last_inactivity_ts.value);
- break;
- default:
- bt_common_abort();
- }
-
- if (adjust_status != LTTNG_LIVE_ITERATOR_STATUS_OK) {
- stream_iter_status = adjust_status;
- goto end;
- }
-
- BT_ASSERT_DBG(adjusted_message);
- stream_iter->current_msg = adjusted_message;
- stream_iter->current_msg_ts_ns = last_inactivity_ts_ns;
- bt_message_put_ref(late_msg);
+ bt_self_component *self_comp = lttng_live_msg_iter->self_comp;
+ bt_logging_level log_level = lttng_live_msg_iter->log_level;
+ const bt_clock_class *clock_class;
+ const bt_stream_class *stream_class;
+ enum bt_clock_class_cycles_to_ns_from_origin_status ts_ns_status;
+ int64_t last_inactivity_ts_ns;
+ enum lttng_live_iterator_status stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_OK;
+ enum lttng_live_iterator_status adjust_status;
+ bt_message *adjusted_message;
+
+ /*
+ * The timestamp of the current message is before the last message sent
+ * by this component. We CANNOT send it as is.
+ *
+ * The only expected scenario in which that could happen is the
+ * following, everything else is a bug in this component, relay deamon,
+ * or CTF parser.
+ *
+ * Expected scenario: The CTF message iterator emitted discarded
+ * packets and discarded events with synthesized beginning and end
+ * timestamps from the bounds of the last known packet and the newly
+ * decoded packet header. The CTF message iterator is not aware of
+ * stream inactivity beacons. Hence, we have to adjust the beginning
+ * timestamp of those types of messages if a stream signalled its
+ * inactivity up until _after_ the last known packet's beginning
+ * timestamp.
+ *
+ * Otherwise, the monotonicity guarantee of message timestamps would
+ * not be preserved.
+ *
+ * In short, the only scenario in which it's okay and fixable to
+ * received a late message is when:
+ * 1. the late message is a discarded packets or discarded events
+ * message,
+ * 2. this stream produced an inactivity message downstream, and
+ * 3. the timestamp of the late message is within the inactivity
+ * timespan we sent downstream through the inactivity message.
+ */
+
+ BT_COMP_LOGD("Handling late message on live stream iterator: "
+ "stream-name=\"%s\", viewer-stream-id=%" PRIu64,
+ stream_iter->name->str, stream_iter->viewer_stream_id);
+
+ if (!stream_iter->last_inactivity_ts.is_set) {
+ BT_COMP_LOGE_APPEND_CAUSE(self_comp, "Invalid live stream state: "
+ "have a late message when no inactivity message "
+ "was ever sent for that stream.");
+ stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_ERROR;
+ goto end;
+ }
+
+ if (!is_discarded_packet_or_event_message(late_msg)) {
+ BT_COMP_LOGE_APPEND_CAUSE(self_comp,
+ "Invalid live stream state: "
+ "have a late message that is not a packet discarded or "
+ "event discarded message: late-msg-type=%s",
+ bt_common_message_type_string(bt_message_get_type(late_msg)));
+ stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_ERROR;
+ goto end;
+ }
+
+ stream_class = bt_stream_borrow_class_const(stream_iter->stream);
+ clock_class = bt_stream_class_borrow_default_clock_class_const(stream_class);
+
+ ts_ns_status = bt_clock_class_cycles_to_ns_from_origin(
+ clock_class, stream_iter->last_inactivity_ts.value, &last_inactivity_ts_ns);
+ if (ts_ns_status != BT_CLOCK_CLASS_CYCLES_TO_NS_FROM_ORIGIN_STATUS_OK) {
+ BT_COMP_LOGE_APPEND_CAUSE(self_comp, "Error converting last "
+ "inactivity message timestamp to nanoseconds");
+ stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_ERROR;
+ goto end;
+ }
+
+ if (last_inactivity_ts_ns <= late_msg_ts_ns) {
+ BT_COMP_LOGE_APPEND_CAUSE(self_comp,
+ "Invalid live stream state: "
+ "have a late message that is none included in a stream "
+ "inactivity timespan: last-inactivity-ts-ns=%" PRIu64
+ "late-msg-ts-ns=%" PRIu64,
+ last_inactivity_ts_ns, late_msg_ts_ns);
+ stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_ERROR;
+ goto end;
+ }
+
+ /*
+ * We now know that it's okay for this message to be late, we can now
+ * adjust its timestamp to ensure monotonicity.
+ */
+ BT_COMP_LOGD("Adjusting the timestamp of late message: late-msg-type=%s, "
+ "msg-new-ts-ns=%" PRIu64,
+ bt_common_message_type_string(bt_message_get_type(late_msg)),
+ stream_iter->last_inactivity_ts.value);
+ switch (bt_message_get_type(late_msg)) {
+ case BT_MESSAGE_TYPE_DISCARDED_EVENTS:
+ adjust_status = adjust_discarded_events_message(
+ lttng_live_msg_iter->self_msg_iter, stream_iter->stream, late_msg, &adjusted_message,
+ stream_iter->last_inactivity_ts.value);
+ break;
+ case BT_MESSAGE_TYPE_DISCARDED_PACKETS:
+ adjust_status = adjust_discarded_packets_message(
+ lttng_live_msg_iter->self_msg_iter, stream_iter->stream, late_msg, &adjusted_message,
+ stream_iter->last_inactivity_ts.value);
+ break;
+ default:
+ bt_common_abort();
+ }
+
+ if (adjust_status != LTTNG_LIVE_ITERATOR_STATUS_OK) {
+ stream_iter_status = adjust_status;
+ goto end;
+ }
+
+ BT_ASSERT_DBG(adjusted_message);
+ stream_iter->current_msg = adjusted_message;
+ stream_iter->current_msg_ts_ns = last_inactivity_ts_ns;
+ bt_message_put_ref(late_msg);
end:
- return stream_iter_status;
+ return stream_iter_status;
}
-static
-enum lttng_live_iterator_status next_stream_iterator_for_trace(
- struct lttng_live_msg_iter *lttng_live_msg_iter,
- struct lttng_live_trace *live_trace,
- struct lttng_live_stream_iterator **youngest_trace_stream_iter)
+static enum lttng_live_iterator_status
+next_stream_iterator_for_trace(struct lttng_live_msg_iter *lttng_live_msg_iter,
+ struct lttng_live_trace *live_trace,
+ struct lttng_live_stream_iterator **youngest_trace_stream_iter)
{
- struct lttng_live_stream_iterator *youngest_candidate_stream_iter = NULL;
- bt_logging_level log_level = lttng_live_msg_iter->log_level;
- bt_self_component *self_comp = lttng_live_msg_iter->self_comp;
- enum lttng_live_iterator_status stream_iter_status;;
- int64_t youngest_candidate_msg_ts = INT64_MAX;
- uint64_t stream_iter_idx;
-
- BT_ASSERT_DBG(live_trace);
- BT_ASSERT_DBG(live_trace->stream_iterators);
-
- BT_COMP_LOGD("Finding the next stream iterator for trace: "
- "trace-id=%" PRIu64, live_trace->id);
- /*
- * Update the current message of every stream iterators of this trace.
- * The current msg of every stream must have a timestamp equal or
- * larger than the last message returned by this iterator. We must
- * ensure monotonicity.
- */
- stream_iter_idx = 0;
- while (stream_iter_idx < live_trace->stream_iterators->len) {
- bool stream_iter_is_ended = false;
- struct lttng_live_stream_iterator *stream_iter =
- (lttng_live_stream_iterator *) g_ptr_array_index(live_trace->stream_iterators,
- stream_iter_idx);
-
- /*
- * If there is no current message for this stream, go fetch
- * one.
- */
- while (!stream_iter->current_msg) {
- const bt_message *msg = NULL;
- int64_t curr_msg_ts_ns = INT64_MAX;
-
- stream_iter_status = lttng_live_iterator_next_msg_on_stream(
- lttng_live_msg_iter, stream_iter, &msg);
-
- if (stream_iter_status == LTTNG_LIVE_ITERATOR_STATUS_END) {
- stream_iter_is_ended = true;
- break;
- }
-
- if (stream_iter_status != LTTNG_LIVE_ITERATOR_STATUS_OK) {
- goto end;
- }
-
- BT_ASSERT_DBG(msg);
-
- BT_COMP_LOGD("Live stream iterator returned message: msg-type=%s, "
- "stream-name=\"%s\", viewer-stream-id=%" PRIu64,
- bt_common_message_type_string(bt_message_get_type(msg)),
- stream_iter->name->str, stream_iter->viewer_stream_id);
-
- /*
- * Get the timestamp in nanoseconds from origin of this
- * messsage.
- */
- live_get_msg_ts_ns(stream_iter, lttng_live_msg_iter,
- msg, lttng_live_msg_iter->last_msg_ts_ns,
- &curr_msg_ts_ns);
-
- /*
- * Check if the message of the current live stream
- * iterator occurred at the exact same time or after the
- * last message returned by this component's message
- * iterator. If not, we need to handle it with care.
- */
- if (curr_msg_ts_ns >= lttng_live_msg_iter->last_msg_ts_ns) {
- stream_iter->current_msg = msg;
- stream_iter->current_msg_ts_ns = curr_msg_ts_ns;
- } else {
- /*
- * We received a message from the past. This
- * may be fixable but it can also be an error.
- */
- stream_iter_status = handle_late_message(
- lttng_live_msg_iter, stream_iter,
- curr_msg_ts_ns, msg);
- if (stream_iter_status != LTTNG_LIVE_ITERATOR_STATUS_OK) {
- BT_COMP_LOGE_APPEND_CAUSE(self_comp,
- "Late message could not be handled correctly: "
- "lttng-live-msg-iter-addr=%p, "
- "stream-name=\"%s\", "
- "curr-msg-ts=%" PRId64
- ", last-msg-ts=%" PRId64,
- lttng_live_msg_iter,
- stream_iter->name->str,
- curr_msg_ts_ns,
- lttng_live_msg_iter->last_msg_ts_ns);
- stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_ERROR;
- goto end;
- }
- }
- }
-
- BT_ASSERT_DBG(stream_iter != youngest_candidate_stream_iter);
-
- if (!stream_iter_is_ended) {
- if (G_UNLIKELY(youngest_candidate_stream_iter == NULL) ||
- stream_iter->current_msg_ts_ns < youngest_candidate_msg_ts) {
- /*
- * Update the current best candidate message
- * for the stream iterator of this live trace
- * to be forwarded downstream.
- */
- youngest_candidate_msg_ts = stream_iter->current_msg_ts_ns;
- youngest_candidate_stream_iter = stream_iter;
- } else if (stream_iter->current_msg_ts_ns == youngest_candidate_msg_ts) {
- /*
- * Order the messages in an arbitrary but
- * deterministic way.
- */
- BT_ASSERT_DBG(stream_iter != youngest_candidate_stream_iter);
- int ret = common_muxing_compare_messages(
- stream_iter->current_msg,
- youngest_candidate_stream_iter->current_msg);
- if (ret < 0) {
- /*
- * The `youngest_candidate_stream_iter->current_msg`
- * should go first. Update the next
- * iterator and the current timestamp.
- */
- youngest_candidate_msg_ts = stream_iter->current_msg_ts_ns;
- youngest_candidate_stream_iter = stream_iter;
- } else if (ret == 0) {
- /*
- * Unable to pick which one should go
- * first.
- */
- BT_COMP_LOGW("Cannot deterministically pick next live stream message iterator because they have identical next messages: "
- "stream-iter-addr=%p"
- "stream-iter-addr=%p",
- stream_iter,
- youngest_candidate_stream_iter);
- }
- }
-
- stream_iter_idx++;
- } else {
- /*
- * The live stream iterator has ended. That
- * iterator is removed from the array, but
- * there is no need to increment
- * stream_iter_idx as
- * g_ptr_array_remove_index_fast replaces the
- * removed element with the array's last
- * element.
- */
- g_ptr_array_remove_index_fast(
- live_trace->stream_iterators,
- stream_iter_idx);
- }
- }
-
- if (youngest_candidate_stream_iter) {
- *youngest_trace_stream_iter = youngest_candidate_stream_iter;
- stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_OK;
- } else {
- /*
- * The only case where we don't have a candidate for this trace
- * is if we reached the end of all the iterators.
- */
- BT_ASSERT(live_trace->stream_iterators->len == 0);
- stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_END;
- }
+ struct lttng_live_stream_iterator *youngest_candidate_stream_iter = NULL;
+ bt_logging_level log_level = lttng_live_msg_iter->log_level;
+ bt_self_component *self_comp = lttng_live_msg_iter->self_comp;
+ enum lttng_live_iterator_status stream_iter_status;
+ ;
+ int64_t youngest_candidate_msg_ts = INT64_MAX;
+ uint64_t stream_iter_idx;
+
+ BT_ASSERT_DBG(live_trace);
+ BT_ASSERT_DBG(live_trace->stream_iterators);
+
+ BT_COMP_LOGD("Finding the next stream iterator for trace: "
+ "trace-id=%" PRIu64,
+ live_trace->id);
+ /*
+ * Update the current message of every stream iterators of this trace.
+ * The current msg of every stream must have a timestamp equal or
+ * larger than the last message returned by this iterator. We must
+ * ensure monotonicity.
+ */
+ stream_iter_idx = 0;
+ while (stream_iter_idx < live_trace->stream_iterators->len) {
+ bool stream_iter_is_ended = false;
+ struct lttng_live_stream_iterator *stream_iter =
+ (lttng_live_stream_iterator *) g_ptr_array_index(live_trace->stream_iterators,
+ stream_iter_idx);
+
+ /*
+ * If there is no current message for this stream, go fetch
+ * one.
+ */
+ while (!stream_iter->current_msg) {
+ const bt_message *msg = NULL;
+ int64_t curr_msg_ts_ns = INT64_MAX;
+
+ stream_iter_status =
+ lttng_live_iterator_next_msg_on_stream(lttng_live_msg_iter, stream_iter, &msg);
+
+ if (stream_iter_status == LTTNG_LIVE_ITERATOR_STATUS_END) {
+ stream_iter_is_ended = true;
+ break;
+ }
+
+ if (stream_iter_status != LTTNG_LIVE_ITERATOR_STATUS_OK) {
+ goto end;
+ }
+
+ BT_ASSERT_DBG(msg);
+
+ BT_COMP_LOGD("Live stream iterator returned message: msg-type=%s, "
+ "stream-name=\"%s\", viewer-stream-id=%" PRIu64,
+ bt_common_message_type_string(bt_message_get_type(msg)),
+ stream_iter->name->str, stream_iter->viewer_stream_id);
+
+ /*
+ * Get the timestamp in nanoseconds from origin of this
+ * messsage.
+ */
+ live_get_msg_ts_ns(stream_iter, lttng_live_msg_iter, msg,
+ lttng_live_msg_iter->last_msg_ts_ns, &curr_msg_ts_ns);
+
+ /*
+ * Check if the message of the current live stream
+ * iterator occurred at the exact same time or after the
+ * last message returned by this component's message
+ * iterator. If not, we need to handle it with care.
+ */
+ if (curr_msg_ts_ns >= lttng_live_msg_iter->last_msg_ts_ns) {
+ stream_iter->current_msg = msg;
+ stream_iter->current_msg_ts_ns = curr_msg_ts_ns;
+ } else {
+ /*
+ * We received a message from the past. This
+ * may be fixable but it can also be an error.
+ */
+ stream_iter_status =
+ handle_late_message(lttng_live_msg_iter, stream_iter, curr_msg_ts_ns, msg);
+ if (stream_iter_status != LTTNG_LIVE_ITERATOR_STATUS_OK) {
+ BT_COMP_LOGE_APPEND_CAUSE(self_comp,
+ "Late message could not be handled correctly: "
+ "lttng-live-msg-iter-addr=%p, "
+ "stream-name=\"%s\", "
+ "curr-msg-ts=%" PRId64 ", last-msg-ts=%" PRId64,
+ lttng_live_msg_iter, stream_iter->name->str,
+ curr_msg_ts_ns, lttng_live_msg_iter->last_msg_ts_ns);
+ stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_ERROR;
+ goto end;
+ }
+ }
+ }
+
+ BT_ASSERT_DBG(stream_iter != youngest_candidate_stream_iter);
+
+ if (!stream_iter_is_ended) {
+ if (G_UNLIKELY(youngest_candidate_stream_iter == NULL) ||
+ stream_iter->current_msg_ts_ns < youngest_candidate_msg_ts) {
+ /*
+ * Update the current best candidate message
+ * for the stream iterator of this live trace
+ * to be forwarded downstream.
+ */
+ youngest_candidate_msg_ts = stream_iter->current_msg_ts_ns;
+ youngest_candidate_stream_iter = stream_iter;
+ } else if (stream_iter->current_msg_ts_ns == youngest_candidate_msg_ts) {
+ /*
+ * Order the messages in an arbitrary but
+ * deterministic way.
+ */
+ BT_ASSERT_DBG(stream_iter != youngest_candidate_stream_iter);
+ int ret = common_muxing_compare_messages(
+ stream_iter->current_msg, youngest_candidate_stream_iter->current_msg);
+ if (ret < 0) {
+ /*
+ * The `youngest_candidate_stream_iter->current_msg`
+ * should go first. Update the next
+ * iterator and the current timestamp.
+ */
+ youngest_candidate_msg_ts = stream_iter->current_msg_ts_ns;
+ youngest_candidate_stream_iter = stream_iter;
+ } else if (ret == 0) {
+ /*
+ * Unable to pick which one should go
+ * first.
+ */
+ BT_COMP_LOGW(
+ "Cannot deterministically pick next live stream message iterator because they have identical next messages: "
+ "stream-iter-addr=%p"
+ "stream-iter-addr=%p",
+ stream_iter, youngest_candidate_stream_iter);
+ }
+ }
+
+ stream_iter_idx++;
+ } else {
+ /*
+ * The live stream iterator has ended. That
+ * iterator is removed from the array, but
+ * there is no need to increment
+ * stream_iter_idx as
+ * g_ptr_array_remove_index_fast replaces the
+ * removed element with the array's last
+ * element.
+ */
+ g_ptr_array_remove_index_fast(live_trace->stream_iterators, stream_iter_idx);
+ }
+ }
+
+ if (youngest_candidate_stream_iter) {
+ *youngest_trace_stream_iter = youngest_candidate_stream_iter;
+ stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_OK;
+ } else {
+ /*
+ * The only case where we don't have a candidate for this trace
+ * is if we reached the end of all the iterators.
+ */
+ BT_ASSERT(live_trace->stream_iterators->len == 0);
+ stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_END;
+ }
end:
- return stream_iter_status;
+ return stream_iter_status;
}
-static
-enum lttng_live_iterator_status next_stream_iterator_for_session(
- struct lttng_live_msg_iter *lttng_live_msg_iter,
- struct lttng_live_session *session,
- struct lttng_live_stream_iterator **youngest_session_stream_iter)
+static enum lttng_live_iterator_status
+next_stream_iterator_for_session(struct lttng_live_msg_iter *lttng_live_msg_iter,
+ struct lttng_live_session *session,
+ struct lttng_live_stream_iterator **youngest_session_stream_iter)
{
- bt_self_component *self_comp = lttng_live_msg_iter->self_comp;
- bt_logging_level log_level = lttng_live_msg_iter->log_level;
- enum lttng_live_iterator_status stream_iter_status;
- uint64_t trace_idx = 0;
- int64_t youngest_candidate_msg_ts = INT64_MAX;
- struct lttng_live_stream_iterator *youngest_candidate_stream_iter = NULL;
-
- BT_COMP_LOGD("Finding the next stream iterator for session: "
- "session-id=%" PRIu64, session->id);
- /*
- * Make sure we are attached to the session and look for new streams
- * and metadata.
- */
- stream_iter_status = lttng_live_get_session(lttng_live_msg_iter, session);
- if (stream_iter_status != LTTNG_LIVE_ITERATOR_STATUS_OK &&
- stream_iter_status != LTTNG_LIVE_ITERATOR_STATUS_CONTINUE &&
- stream_iter_status != LTTNG_LIVE_ITERATOR_STATUS_END) {
- goto end;
- }
-
- BT_ASSERT_DBG(session->traces);
-
- while (trace_idx < session->traces->len) {
- bool trace_is_ended = false;
- struct lttng_live_stream_iterator *stream_iter;
- struct lttng_live_trace *trace =
- (lttng_live_trace *) g_ptr_array_index(session->traces, trace_idx);
-
- stream_iter_status = next_stream_iterator_for_trace(
- lttng_live_msg_iter, trace, &stream_iter);
- if (stream_iter_status == LTTNG_LIVE_ITERATOR_STATUS_END) {
- /*
- * All the live stream iterators for this trace are
- * ENDed. Remove the trace from this session.
- */
- trace_is_ended = true;
- } else if (stream_iter_status != LTTNG_LIVE_ITERATOR_STATUS_OK) {
- goto end;
- }
-
- if (!trace_is_ended) {
- BT_ASSERT_DBG(stream_iter);
-
- if (G_UNLIKELY(youngest_candidate_stream_iter == NULL) ||
- stream_iter->current_msg_ts_ns < youngest_candidate_msg_ts) {
- youngest_candidate_msg_ts = stream_iter->current_msg_ts_ns;
- youngest_candidate_stream_iter = stream_iter;
- } else if (stream_iter->current_msg_ts_ns == youngest_candidate_msg_ts) {
- /*
- * Order the messages in an arbitrary but
- * deterministic way.
- */
- int ret = common_muxing_compare_messages(
- stream_iter->current_msg,
- youngest_candidate_stream_iter->current_msg);
- if (ret < 0) {
- /*
- * The `youngest_candidate_stream_iter->current_msg`
- * should go first. Update the next iterator
- * and the current timestamp.
- */
- youngest_candidate_msg_ts = stream_iter->current_msg_ts_ns;
- youngest_candidate_stream_iter = stream_iter;
- } else if (ret == 0) {
- /* Unable to pick which one should go first. */
- BT_COMP_LOGW("Cannot deterministically pick next live stream message iterator because they have identical next messages: "
- "stream-iter-addr=%p" "stream-iter-addr=%p",
- stream_iter, youngest_candidate_stream_iter);
- }
- }
- trace_idx++;
- } else {
- /*
- * trace_idx is not incremented since
- * g_ptr_array_remove_index_fast replaces the
- * element at trace_idx with the array's last element.
- */
- g_ptr_array_remove_index_fast(session->traces,
- trace_idx);
- }
- }
- if (youngest_candidate_stream_iter) {
- *youngest_session_stream_iter = youngest_candidate_stream_iter;
- stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_OK;
- } else {
- /*
- * The only cases where we don't have a candidate for this
- * trace is:
- * 1. if we reached the end of all the iterators of all the
- * traces of this session,
- * 2. if we never had live stream iterator in the first place.
- *
- * In either cases, we return END.
- */
- BT_ASSERT(session->traces->len == 0);
- stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_END;
- }
+ bt_self_component *self_comp = lttng_live_msg_iter->self_comp;
+ bt_logging_level log_level = lttng_live_msg_iter->log_level;
+ enum lttng_live_iterator_status stream_iter_status;
+ uint64_t trace_idx = 0;
+ int64_t youngest_candidate_msg_ts = INT64_MAX;
+ struct lttng_live_stream_iterator *youngest_candidate_stream_iter = NULL;
+
+ BT_COMP_LOGD("Finding the next stream iterator for session: "
+ "session-id=%" PRIu64,
+ session->id);
+ /*
+ * Make sure we are attached to the session and look for new streams
+ * and metadata.
+ */
+ stream_iter_status = lttng_live_get_session(lttng_live_msg_iter, session);
+ if (stream_iter_status != LTTNG_LIVE_ITERATOR_STATUS_OK &&
+ stream_iter_status != LTTNG_LIVE_ITERATOR_STATUS_CONTINUE &&
+ stream_iter_status != LTTNG_LIVE_ITERATOR_STATUS_END) {
+ goto end;
+ }
+
+ BT_ASSERT_DBG(session->traces);
+
+ while (trace_idx < session->traces->len) {
+ bool trace_is_ended = false;
+ struct lttng_live_stream_iterator *stream_iter;
+ struct lttng_live_trace *trace =
+ (lttng_live_trace *) g_ptr_array_index(session->traces, trace_idx);
+
+ stream_iter_status =
+ next_stream_iterator_for_trace(lttng_live_msg_iter, trace, &stream_iter);
+ if (stream_iter_status == LTTNG_LIVE_ITERATOR_STATUS_END) {
+ /*
+ * All the live stream iterators for this trace are
+ * ENDed. Remove the trace from this session.
+ */
+ trace_is_ended = true;
+ } else if (stream_iter_status != LTTNG_LIVE_ITERATOR_STATUS_OK) {
+ goto end;
+ }
+
+ if (!trace_is_ended) {
+ BT_ASSERT_DBG(stream_iter);
+
+ if (G_UNLIKELY(youngest_candidate_stream_iter == NULL) ||
+ stream_iter->current_msg_ts_ns < youngest_candidate_msg_ts) {
+ youngest_candidate_msg_ts = stream_iter->current_msg_ts_ns;
+ youngest_candidate_stream_iter = stream_iter;
+ } else if (stream_iter->current_msg_ts_ns == youngest_candidate_msg_ts) {
+ /*
+ * Order the messages in an arbitrary but
+ * deterministic way.
+ */
+ int ret = common_muxing_compare_messages(
+ stream_iter->current_msg, youngest_candidate_stream_iter->current_msg);
+ if (ret < 0) {
+ /*
+ * The `youngest_candidate_stream_iter->current_msg`
+ * should go first. Update the next iterator
+ * and the current timestamp.
+ */
+ youngest_candidate_msg_ts = stream_iter->current_msg_ts_ns;
+ youngest_candidate_stream_iter = stream_iter;
+ } else if (ret == 0) {
+ /* Unable to pick which one should go first. */
+ BT_COMP_LOGW(
+ "Cannot deterministically pick next live stream message iterator because they have identical next messages: "
+ "stream-iter-addr=%p"
+ "stream-iter-addr=%p",
+ stream_iter, youngest_candidate_stream_iter);
+ }
+ }
+ trace_idx++;
+ } else {
+ /*
+ * trace_idx is not incremented since
+ * g_ptr_array_remove_index_fast replaces the
+ * element at trace_idx with the array's last element.
+ */
+ g_ptr_array_remove_index_fast(session->traces, trace_idx);
+ }
+ }
+ if (youngest_candidate_stream_iter) {
+ *youngest_session_stream_iter = youngest_candidate_stream_iter;
+ stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_OK;
+ } else {
+ /*
+ * The only cases where we don't have a candidate for this
+ * trace is:
+ * 1. if we reached the end of all the iterators of all the
+ * traces of this session,
+ * 2. if we never had live stream iterator in the first place.
+ *
+ * In either cases, we return END.
+ */
+ BT_ASSERT(session->traces->len == 0);
+ stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_END;
+ }
end:
- return stream_iter_status;
+ return stream_iter_status;
}
-static inline
-void put_messages(bt_message_array_const msgs, uint64_t count)
+static inline void put_messages(bt_message_array_const msgs, uint64_t count)
{
- uint64_t i;
+ uint64_t i;
- for (i = 0; i < count; i++) {
- BT_MESSAGE_PUT_REF_AND_RESET(msgs[i]);
- }
+ for (i = 0; i < count; i++) {
+ BT_MESSAGE_PUT_REF_AND_RESET(msgs[i]);
+ }
}
BT_HIDDEN
-bt_message_iterator_class_next_method_status lttng_live_msg_iter_next(
- bt_self_message_iterator *self_msg_it,
- bt_message_array_const msgs, uint64_t capacity,
- uint64_t *count)
+bt_message_iterator_class_next_method_status
+lttng_live_msg_iter_next(bt_self_message_iterator *self_msg_it, bt_message_array_const msgs,
+ uint64_t capacity, uint64_t *count)
{
- bt_message_iterator_class_next_method_status status;
- enum lttng_live_viewer_status viewer_status;
- struct lttng_live_msg_iter *lttng_live_msg_iter =
- (struct lttng_live_msg_iter *) bt_self_message_iterator_get_data(self_msg_it);
- struct lttng_live_component *lttng_live =
- lttng_live_msg_iter->lttng_live_comp;
- bt_self_component *self_comp = lttng_live_msg_iter->self_comp;
- bt_logging_level log_level = lttng_live_msg_iter->log_level;
- enum lttng_live_iterator_status stream_iter_status;
- uint64_t session_idx;
-
- *count = 0;
-
- BT_ASSERT_DBG(lttng_live_msg_iter);
-
- if (G_UNLIKELY(lttng_live_msg_iter->was_interrupted)) {
- /*
- * The iterator was interrupted in a previous call to the
- * `_next()` method. We currently do not support generating
- * messages after such event. The babeltrace2 CLI should never
- * be running the graph after being interrupted. So this check
- * is to prevent other graph users from using this live
- * iterator in an messed up internal state.
- */
- status = BT_MESSAGE_ITERATOR_CLASS_NEXT_METHOD_STATUS_ERROR;
- BT_COMP_LOGE_APPEND_CAUSE(self_comp,
- "Message iterator was interrupted during a previous call to the `next()` and currently does not support continuing after such event.");
- goto end;
- }
-
- /*
- * Clear all the invalid message reference that might be left over in
- * the output array.
- */
- memset(msgs, 0, capacity * sizeof(*msgs));
-
- /*
- * If no session are exposed on the relay found at the url provided by
- * the user, session count will be 0. In this case, we return status
- * end to return gracefully.
- */
- if (lttng_live_msg_iter->sessions->len == 0) {
- if (lttng_live->params.sess_not_found_act !=
- SESSION_NOT_FOUND_ACTION_CONTINUE) {
- status = BT_MESSAGE_ITERATOR_CLASS_NEXT_METHOD_STATUS_END;
- goto end;
- } else {
- /*
- * The are no more active session for this session
- * name. Retry to create a viewer session for the
- * requested session name.
- */
- viewer_status = lttng_live_create_viewer_session(lttng_live_msg_iter);
- if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) {
- if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_ERROR) {
- status = BT_MESSAGE_ITERATOR_CLASS_NEXT_METHOD_STATUS_ERROR;
- BT_COMP_LOGE_APPEND_CAUSE(self_comp,
- "Error creating LTTng live viewer session");
- } else if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED) {
- status = BT_MESSAGE_ITERATOR_CLASS_NEXT_METHOD_STATUS_AGAIN;
- } else {
- bt_common_abort();
- }
- goto end;
- }
- }
- }
-
- if (lttng_live_msg_iter->active_stream_iter == 0) {
- lttng_live_force_new_streams_and_metadata(lttng_live_msg_iter);
- }
-
- /*
- * Here the muxing of message is done.
- *
- * We need to iterate over all the streams of all the traces of all the
- * viewer sessions in order to get the message with the smallest
- * timestamp. In this case, a session is a viewer session and there is
- * one viewer session per consumer daemon. (UST 32bit, UST 64bit and/or
- * kernel). Each viewer session can have multiple traces, for example,
- * 64bit UST viewer sessions could have multiple per-pid traces.
- *
- * We iterate over the streams of each traces to update and see what is
- * their next message's timestamp. From those timestamps, we select the
- * message with the smallest timestamp as the best candidate message
- * for that trace and do the same thing across all the sessions.
- *
- * We then compare the timestamp of best candidate message of all the
- * sessions to pick the message with the smallest timestamp and we
- * return it.
- */
- while (*count < capacity) {
- struct lttng_live_stream_iterator *youngest_stream_iter = NULL,
- *candidate_stream_iter = NULL;
- int64_t youngest_msg_ts_ns = INT64_MAX;
-
- BT_ASSERT_DBG(lttng_live_msg_iter->sessions);
- session_idx = 0;
- while (session_idx < lttng_live_msg_iter->sessions->len) {
- struct lttng_live_session *session =
- (lttng_live_session *) g_ptr_array_index(lttng_live_msg_iter->sessions,
- session_idx);
-
- /* Find the best candidate message to send downstream. */
- stream_iter_status = next_stream_iterator_for_session(
- lttng_live_msg_iter, session,
- &candidate_stream_iter);
-
- /* If we receive an END status, it means that either:
- * - Those traces never had active streams (UST with no
- * data produced yet),
- * - All live stream iterators have ENDed.*/
- if (stream_iter_status == LTTNG_LIVE_ITERATOR_STATUS_END) {
- if (session->closed && session->traces->len == 0) {
- /*
- * Remove the session from the list.
- * session_idx is not modified since
- * g_ptr_array_remove_index_fast
- * replaces the the removed element with
- * the array's last element.
- */
- g_ptr_array_remove_index_fast(
- lttng_live_msg_iter->sessions,
- session_idx);
- } else {
- session_idx++;
- }
- continue;
- }
-
- if (stream_iter_status != LTTNG_LIVE_ITERATOR_STATUS_OK) {
- goto return_status;
- }
-
- if (G_UNLIKELY(youngest_stream_iter == NULL) ||
- candidate_stream_iter->current_msg_ts_ns < youngest_msg_ts_ns) {
- youngest_msg_ts_ns = candidate_stream_iter->current_msg_ts_ns;
- youngest_stream_iter = candidate_stream_iter;
- } else if (candidate_stream_iter->current_msg_ts_ns == youngest_msg_ts_ns) {
- /*
- * The currently selected message to be sent
- * downstream next has the exact same timestamp
- * that of the current candidate message. We
- * must break the tie in a predictable manner.
- */
- BT_COMP_LOGD_STR("Two of the next message candidates have the same timestamps, pick one deterministically.");
- /*
- * Order the messages in an arbitrary but
- * deterministic way.
- */
- int ret = common_muxing_compare_messages(
- candidate_stream_iter->current_msg,
- youngest_stream_iter->current_msg);
- if (ret < 0) {
- /*
- * The `candidate_stream_iter->current_msg`
- * should go first. Update the next
- * iterator and the current timestamp.
- */
- youngest_msg_ts_ns = candidate_stream_iter->current_msg_ts_ns;
- youngest_stream_iter = candidate_stream_iter;
- } else if (ret == 0) {
- /* Unable to pick which one should go first. */
- BT_COMP_LOGW("Cannot deterministically pick next live stream message iterator because they have identical next messages: "
- "next-stream-iter-addr=%p" "candidate-stream-iter-addr=%p",
- youngest_stream_iter, candidate_stream_iter);
- }
- }
-
- session_idx++;
- }
-
- if (!youngest_stream_iter) {
- stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_AGAIN;
- goto return_status;
- }
-
- BT_ASSERT_DBG(youngest_stream_iter->current_msg);
- /* Ensure monotonicity. */
- BT_ASSERT_DBG(lttng_live_msg_iter->last_msg_ts_ns <=
- youngest_stream_iter->current_msg_ts_ns);
-
- /*
- * Insert the next message to the message batch. This will set
- * stream iterator current messsage to NULL so that next time
- * we fetch the next message of that stream iterator
- */
- BT_MESSAGE_MOVE_REF(msgs[*count], youngest_stream_iter->current_msg);
- (*count)++;
-
- /* Update the last timestamp in nanoseconds sent downstream. */
- lttng_live_msg_iter->last_msg_ts_ns = youngest_msg_ts_ns;
- youngest_stream_iter->current_msg_ts_ns = INT64_MAX;
-
- stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_OK;
- }
+ bt_message_iterator_class_next_method_status status;
+ enum lttng_live_viewer_status viewer_status;
+ struct lttng_live_msg_iter *lttng_live_msg_iter =
+ (struct lttng_live_msg_iter *) bt_self_message_iterator_get_data(self_msg_it);
+ struct lttng_live_component *lttng_live = lttng_live_msg_iter->lttng_live_comp;
+ bt_self_component *self_comp = lttng_live_msg_iter->self_comp;
+ bt_logging_level log_level = lttng_live_msg_iter->log_level;
+ enum lttng_live_iterator_status stream_iter_status;
+ uint64_t session_idx;
+
+ *count = 0;
+
+ BT_ASSERT_DBG(lttng_live_msg_iter);
+
+ if (G_UNLIKELY(lttng_live_msg_iter->was_interrupted)) {
+ /*
+ * The iterator was interrupted in a previous call to the
+ * `_next()` method. We currently do not support generating
+ * messages after such event. The babeltrace2 CLI should never
+ * be running the graph after being interrupted. So this check
+ * is to prevent other graph users from using this live
+ * iterator in an messed up internal state.
+ */
+ status = BT_MESSAGE_ITERATOR_CLASS_NEXT_METHOD_STATUS_ERROR;
+ BT_COMP_LOGE_APPEND_CAUSE(
+ self_comp,
+ "Message iterator was interrupted during a previous call to the `next()` and currently does not support continuing after such event.");
+ goto end;
+ }
+
+ /*
+ * Clear all the invalid message reference that might be left over in
+ * the output array.
+ */
+ memset(msgs, 0, capacity * sizeof(*msgs));
+
+ /*
+ * If no session are exposed on the relay found at the url provided by
+ * the user, session count will be 0. In this case, we return status
+ * end to return gracefully.
+ */
+ if (lttng_live_msg_iter->sessions->len == 0) {
+ if (lttng_live->params.sess_not_found_act != SESSION_NOT_FOUND_ACTION_CONTINUE) {
+ status = BT_MESSAGE_ITERATOR_CLASS_NEXT_METHOD_STATUS_END;
+ goto end;
+ } else {
+ /*
+ * The are no more active session for this session
+ * name. Retry to create a viewer session for the
+ * requested session name.
+ */
+ viewer_status = lttng_live_create_viewer_session(lttng_live_msg_iter);
+ if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) {
+ if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_ERROR) {
+ status = BT_MESSAGE_ITERATOR_CLASS_NEXT_METHOD_STATUS_ERROR;
+ BT_COMP_LOGE_APPEND_CAUSE(self_comp,
+ "Error creating LTTng live viewer session");
+ } else if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED) {
+ status = BT_MESSAGE_ITERATOR_CLASS_NEXT_METHOD_STATUS_AGAIN;
+ } else {
+ bt_common_abort();
+ }
+ goto end;
+ }
+ }
+ }
+
+ if (lttng_live_msg_iter->active_stream_iter == 0) {
+ lttng_live_force_new_streams_and_metadata(lttng_live_msg_iter);
+ }
+
+ /*
+ * Here the muxing of message is done.
+ *
+ * We need to iterate over all the streams of all the traces of all the
+ * viewer sessions in order to get the message with the smallest
+ * timestamp. In this case, a session is a viewer session and there is
+ * one viewer session per consumer daemon. (UST 32bit, UST 64bit and/or
+ * kernel). Each viewer session can have multiple traces, for example,
+ * 64bit UST viewer sessions could have multiple per-pid traces.
+ *
+ * We iterate over the streams of each traces to update and see what is
+ * their next message's timestamp. From those timestamps, we select the
+ * message with the smallest timestamp as the best candidate message
+ * for that trace and do the same thing across all the sessions.
+ *
+ * We then compare the timestamp of best candidate message of all the
+ * sessions to pick the message with the smallest timestamp and we
+ * return it.
+ */
+ while (*count < capacity) {
+ struct lttng_live_stream_iterator *youngest_stream_iter = NULL,
+ *candidate_stream_iter = NULL;
+ int64_t youngest_msg_ts_ns = INT64_MAX;
+
+ BT_ASSERT_DBG(lttng_live_msg_iter->sessions);
+ session_idx = 0;
+ while (session_idx < lttng_live_msg_iter->sessions->len) {
+ struct lttng_live_session *session = (lttng_live_session *) g_ptr_array_index(
+ lttng_live_msg_iter->sessions, session_idx);
+
+ /* Find the best candidate message to send downstream. */
+ stream_iter_status = next_stream_iterator_for_session(lttng_live_msg_iter, session,
+ &candidate_stream_iter);
+
+ /* If we receive an END status, it means that either:
+ * - Those traces never had active streams (UST with no
+ * data produced yet),
+ * - All live stream iterators have ENDed.*/
+ if (stream_iter_status == LTTNG_LIVE_ITERATOR_STATUS_END) {
+ if (session->closed && session->traces->len == 0) {
+ /*
+ * Remove the session from the list.
+ * session_idx is not modified since
+ * g_ptr_array_remove_index_fast
+ * replaces the the removed element with
+ * the array's last element.
+ */
+ g_ptr_array_remove_index_fast(lttng_live_msg_iter->sessions, session_idx);
+ } else {
+ session_idx++;
+ }
+ continue;
+ }
+
+ if (stream_iter_status != LTTNG_LIVE_ITERATOR_STATUS_OK) {
+ goto return_status;
+ }
+
+ if (G_UNLIKELY(youngest_stream_iter == NULL) ||
+ candidate_stream_iter->current_msg_ts_ns < youngest_msg_ts_ns) {
+ youngest_msg_ts_ns = candidate_stream_iter->current_msg_ts_ns;
+ youngest_stream_iter = candidate_stream_iter;
+ } else if (candidate_stream_iter->current_msg_ts_ns == youngest_msg_ts_ns) {
+ /*
+ * The currently selected message to be sent
+ * downstream next has the exact same timestamp
+ * that of the current candidate message. We
+ * must break the tie in a predictable manner.
+ */
+ BT_COMP_LOGD_STR(
+ "Two of the next message candidates have the same timestamps, pick one deterministically.");
+ /*
+ * Order the messages in an arbitrary but
+ * deterministic way.
+ */
+ int ret = common_muxing_compare_messages(candidate_stream_iter->current_msg,
+ youngest_stream_iter->current_msg);
+ if (ret < 0) {
+ /*
+ * The `candidate_stream_iter->current_msg`
+ * should go first. Update the next
+ * iterator and the current timestamp.
+ */
+ youngest_msg_ts_ns = candidate_stream_iter->current_msg_ts_ns;
+ youngest_stream_iter = candidate_stream_iter;
+ } else if (ret == 0) {
+ /* Unable to pick which one should go first. */
+ BT_COMP_LOGW(
+ "Cannot deterministically pick next live stream message iterator because they have identical next messages: "
+ "next-stream-iter-addr=%p"
+ "candidate-stream-iter-addr=%p",
+ youngest_stream_iter, candidate_stream_iter);
+ }
+ }
+
+ session_idx++;
+ }
+
+ if (!youngest_stream_iter) {
+ stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_AGAIN;
+ goto return_status;
+ }
+
+ BT_ASSERT_DBG(youngest_stream_iter->current_msg);
+ /* Ensure monotonicity. */
+ BT_ASSERT_DBG(lttng_live_msg_iter->last_msg_ts_ns <=
+ youngest_stream_iter->current_msg_ts_ns);
+
+ /*
+ * Insert the next message to the message batch. This will set
+ * stream iterator current messsage to NULL so that next time
+ * we fetch the next message of that stream iterator
+ */
+ BT_MESSAGE_MOVE_REF(msgs[*count], youngest_stream_iter->current_msg);
+ (*count)++;
+
+ /* Update the last timestamp in nanoseconds sent downstream. */
+ lttng_live_msg_iter->last_msg_ts_ns = youngest_msg_ts_ns;
+ youngest_stream_iter->current_msg_ts_ns = INT64_MAX;
+
+ stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_OK;
+ }
return_status:
- switch (stream_iter_status) {
- case LTTNG_LIVE_ITERATOR_STATUS_OK:
- case LTTNG_LIVE_ITERATOR_STATUS_AGAIN:
- /*
- * If we gathered messages, return _OK even if the graph was
- * interrupted. This allows for the components downstream to at
- * least get the thoses messages. If the graph was indeed
- * interrupted there should not be another _next() call as the
- * application will tear down the graph. This component class
- * doesn't support restarting after an interruption.
- */
- if (*count > 0) {
- status = BT_MESSAGE_ITERATOR_CLASS_NEXT_METHOD_STATUS_OK;
- } else {
- status = BT_MESSAGE_ITERATOR_CLASS_NEXT_METHOD_STATUS_AGAIN;
- }
- break;
- case LTTNG_LIVE_ITERATOR_STATUS_END:
- status = BT_MESSAGE_ITERATOR_CLASS_NEXT_METHOD_STATUS_END;
- break;
- case LTTNG_LIVE_ITERATOR_STATUS_NOMEM:
- BT_COMP_LOGE_APPEND_CAUSE(self_comp,
- "Memory error preparing the next batch of messages: "
- "live-iter-status=%s",
- lttng_live_iterator_status_string(stream_iter_status));
- status = BT_MESSAGE_ITERATOR_CLASS_NEXT_METHOD_STATUS_MEMORY_ERROR;
- break;
- case LTTNG_LIVE_ITERATOR_STATUS_ERROR:
- case LTTNG_LIVE_ITERATOR_STATUS_INVAL:
- case LTTNG_LIVE_ITERATOR_STATUS_UNSUPPORTED:
- BT_COMP_LOGE_APPEND_CAUSE(self_comp,
- "Error preparing the next batch of messages: "
- "live-iter-status=%s",
- lttng_live_iterator_status_string(stream_iter_status));
-
- status = BT_MESSAGE_ITERATOR_CLASS_NEXT_METHOD_STATUS_ERROR;
- /* Put all existing messages on error. */
- put_messages(msgs, *count);
- break;
- default:
- bt_common_abort();
- }
+ switch (stream_iter_status) {
+ case LTTNG_LIVE_ITERATOR_STATUS_OK:
+ case LTTNG_LIVE_ITERATOR_STATUS_AGAIN:
+ /*
+ * If we gathered messages, return _OK even if the graph was
+ * interrupted. This allows for the components downstream to at
+ * least get the thoses messages. If the graph was indeed
+ * interrupted there should not be another _next() call as the
+ * application will tear down the graph. This component class
+ * doesn't support restarting after an interruption.
+ */
+ if (*count > 0) {
+ status = BT_MESSAGE_ITERATOR_CLASS_NEXT_METHOD_STATUS_OK;
+ } else {
+ status = BT_MESSAGE_ITERATOR_CLASS_NEXT_METHOD_STATUS_AGAIN;
+ }
+ break;
+ case LTTNG_LIVE_ITERATOR_STATUS_END:
+ status = BT_MESSAGE_ITERATOR_CLASS_NEXT_METHOD_STATUS_END;
+ break;
+ case LTTNG_LIVE_ITERATOR_STATUS_NOMEM:
+ BT_COMP_LOGE_APPEND_CAUSE(self_comp,
+ "Memory error preparing the next batch of messages: "
+ "live-iter-status=%s",
+ lttng_live_iterator_status_string(stream_iter_status));
+ status = BT_MESSAGE_ITERATOR_CLASS_NEXT_METHOD_STATUS_MEMORY_ERROR;
+ break;
+ case LTTNG_LIVE_ITERATOR_STATUS_ERROR:
+ case LTTNG_LIVE_ITERATOR_STATUS_INVAL:
+ case LTTNG_LIVE_ITERATOR_STATUS_UNSUPPORTED:
+ BT_COMP_LOGE_APPEND_CAUSE(self_comp,
+ "Error preparing the next batch of messages: "
+ "live-iter-status=%s",
+ lttng_live_iterator_status_string(stream_iter_status));
+
+ status = BT_MESSAGE_ITERATOR_CLASS_NEXT_METHOD_STATUS_ERROR;
+ /* Put all existing messages on error. */
+ put_messages(msgs, *count);
+ break;
+ default:
+ bt_common_abort();
+ }
end:
- return status;
+ return status;
}
-static
-struct lttng_live_msg_iter *lttng_live_msg_iter_create(
- struct lttng_live_component *lttng_live_comp,
- bt_self_message_iterator *self_msg_it)
+static struct lttng_live_msg_iter *
+lttng_live_msg_iter_create(struct lttng_live_component *lttng_live_comp,
+ bt_self_message_iterator *self_msg_it)
{
- bt_self_component *self_comp = lttng_live_comp->self_comp;
- bt_logging_level log_level = lttng_live_comp->log_level;
-
- struct lttng_live_msg_iter *lttng_live_msg_iter =
- g_new0(struct lttng_live_msg_iter, 1);
- if (!lttng_live_msg_iter) {
- BT_COMP_LOGE_APPEND_CAUSE(self_comp,
- "Failed to allocate lttng_live_msg_iter");
- goto end;
- }
-
- lttng_live_msg_iter->log_level = lttng_live_comp->log_level;
- lttng_live_msg_iter->self_comp = lttng_live_comp->self_comp;
- lttng_live_msg_iter->lttng_live_comp = lttng_live_comp;
- lttng_live_msg_iter->self_msg_iter = self_msg_it;
-
- lttng_live_msg_iter->active_stream_iter = 0;
- lttng_live_msg_iter->last_msg_ts_ns = INT64_MIN;
- lttng_live_msg_iter->was_interrupted = false;
-
- lttng_live_msg_iter->sessions = g_ptr_array_new_with_free_func(
- (GDestroyNotify) lttng_live_destroy_session);
- BT_ASSERT(lttng_live_msg_iter->sessions);
+ bt_self_component *self_comp = lttng_live_comp->self_comp;
+ bt_logging_level log_level = lttng_live_comp->log_level;
-end:
- return lttng_live_msg_iter;
+ struct lttng_live_msg_iter *lttng_live_msg_iter = g_new0(struct lttng_live_msg_iter, 1);
+ if (!lttng_live_msg_iter) {
+ BT_COMP_LOGE_APPEND_CAUSE(self_comp, "Failed to allocate lttng_live_msg_iter");
+ goto end;
+ }
+
+ lttng_live_msg_iter->log_level = lttng_live_comp->log_level;
+ lttng_live_msg_iter->self_comp = lttng_live_comp->self_comp;
+ lttng_live_msg_iter->lttng_live_comp = lttng_live_comp;
+ lttng_live_msg_iter->self_msg_iter = self_msg_it;
+
+ lttng_live_msg_iter->active_stream_iter = 0;
+ lttng_live_msg_iter->last_msg_ts_ns = INT64_MIN;
+ lttng_live_msg_iter->was_interrupted = false;
+ lttng_live_msg_iter->sessions =
+ g_ptr_array_new_with_free_func((GDestroyNotify) lttng_live_destroy_session);
+ BT_ASSERT(lttng_live_msg_iter->sessions);
+
+end:
+ return lttng_live_msg_iter;
}
BT_HIDDEN
-bt_message_iterator_class_initialize_method_status lttng_live_msg_iter_init(
- bt_self_message_iterator *self_msg_it,
- bt_self_message_iterator_configuration *config,
- bt_self_component_port_output *self_port)
+bt_message_iterator_class_initialize_method_status
+lttng_live_msg_iter_init(bt_self_message_iterator *self_msg_it,
+ bt_self_message_iterator_configuration *config,
+ bt_self_component_port_output *self_port)
{
- bt_message_iterator_class_initialize_method_status status;
- struct lttng_live_component *lttng_live;
- struct lttng_live_msg_iter *lttng_live_msg_iter;
- enum lttng_live_viewer_status viewer_status;
- bt_logging_level log_level;
- bt_self_component *self_comp =
- bt_self_message_iterator_borrow_component(self_msg_it);
-
- lttng_live = (lttng_live_component *) bt_self_component_get_data(self_comp);
- log_level = lttng_live->log_level;
- self_comp = lttng_live->self_comp;
-
-
- /* There can be only one downstream iterator at the same time. */
- BT_ASSERT(!lttng_live->has_msg_iter);
- lttng_live->has_msg_iter = true;
-
- lttng_live_msg_iter = lttng_live_msg_iter_create(lttng_live,
- self_msg_it);
- if (!lttng_live_msg_iter) {
- status = BT_MESSAGE_ITERATOR_CLASS_INITIALIZE_METHOD_STATUS_MEMORY_ERROR;
- BT_COMP_LOGE_APPEND_CAUSE(self_comp,
- "Failed to create lttng_live_msg_iter");
- goto error;
- }
-
- viewer_status = live_viewer_connection_create(self_comp, NULL,
- log_level, lttng_live->params.url->str, false,
- lttng_live_msg_iter, <tng_live_msg_iter->viewer_connection);
- if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) {
- if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_ERROR) {
- BT_COMP_LOGE_APPEND_CAUSE(self_comp,
- "Failed to create viewer connection");
- } else if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED) {
- /*
- * Interruption in the _iter_init() method is not
- * supported. Return an error.
- */
- BT_COMP_LOGE_APPEND_CAUSE(self_comp,
- "Interrupted while creating viewer connection");
- }
- goto error;
- }
-
- viewer_status = lttng_live_create_viewer_session(lttng_live_msg_iter);
- if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) {
- if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_ERROR) {
- BT_COMP_LOGE_APPEND_CAUSE(self_comp,
- "Failed to create viewer session");
- } else if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED) {
- /*
- * Interruption in the _iter_init() method is not
- * supported. Return an error.
- */
- BT_COMP_LOGE_APPEND_CAUSE(self_comp,
- "Interrupted when creating viewer session");
- }
- goto error;
- }
-
- if (lttng_live_msg_iter->sessions->len == 0) {
- switch (lttng_live->params.sess_not_found_act) {
- case SESSION_NOT_FOUND_ACTION_CONTINUE:
- BT_COMP_LOGI("Unable to connect to the requested live viewer session. Keep trying to connect because of "
- "%s=\"%s\" component parameter: url=\"%s\"",
- SESS_NOT_FOUND_ACTION_PARAM,
- SESS_NOT_FOUND_ACTION_CONTINUE_STR,
- lttng_live->params.url->str);
- break;
- case SESSION_NOT_FOUND_ACTION_FAIL:
- BT_COMP_LOGE_APPEND_CAUSE(self_comp,
- "Unable to connect to the requested live viewer session. Fail the message iterator initialization because of %s=\"%s\" "
- "component parameter: url =\"%s\"",
- SESS_NOT_FOUND_ACTION_PARAM,
- SESS_NOT_FOUND_ACTION_FAIL_STR,
- lttng_live->params.url->str);
- goto error;
- case SESSION_NOT_FOUND_ACTION_END:
- BT_COMP_LOGI("Unable to connect to the requested live viewer session. End gracefully at the first _next() "
- "call because of %s=\"%s\" component parameter: "
- "url=\"%s\"", SESS_NOT_FOUND_ACTION_PARAM,
- SESS_NOT_FOUND_ACTION_END_STR,
- lttng_live->params.url->str);
- break;
- default:
- bt_common_abort();
- }
- }
-
- bt_self_message_iterator_set_data(self_msg_it, lttng_live_msg_iter);
- status = BT_MESSAGE_ITERATOR_CLASS_INITIALIZE_METHOD_STATUS_OK;
- goto end;
+ bt_message_iterator_class_initialize_method_status status;
+ struct lttng_live_component *lttng_live;
+ struct lttng_live_msg_iter *lttng_live_msg_iter;
+ enum lttng_live_viewer_status viewer_status;
+ bt_logging_level log_level;
+ bt_self_component *self_comp = bt_self_message_iterator_borrow_component(self_msg_it);
+
+ lttng_live = (lttng_live_component *) bt_self_component_get_data(self_comp);
+ log_level = lttng_live->log_level;
+ self_comp = lttng_live->self_comp;
+
+ /* There can be only one downstream iterator at the same time. */
+ BT_ASSERT(!lttng_live->has_msg_iter);
+ lttng_live->has_msg_iter = true;
+
+ lttng_live_msg_iter = lttng_live_msg_iter_create(lttng_live, self_msg_it);
+ if (!lttng_live_msg_iter) {
+ status = BT_MESSAGE_ITERATOR_CLASS_INITIALIZE_METHOD_STATUS_MEMORY_ERROR;
+ BT_COMP_LOGE_APPEND_CAUSE(self_comp, "Failed to create lttng_live_msg_iter");
+ goto error;
+ }
+
+ viewer_status = live_viewer_connection_create(
+ self_comp, NULL, log_level, lttng_live->params.url->str, false, lttng_live_msg_iter,
+ <tng_live_msg_iter->viewer_connection);
+ if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) {
+ if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_ERROR) {
+ BT_COMP_LOGE_APPEND_CAUSE(self_comp, "Failed to create viewer connection");
+ } else if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED) {
+ /*
+ * Interruption in the _iter_init() method is not
+ * supported. Return an error.
+ */
+ BT_COMP_LOGE_APPEND_CAUSE(self_comp, "Interrupted while creating viewer connection");
+ }
+ goto error;
+ }
+
+ viewer_status = lttng_live_create_viewer_session(lttng_live_msg_iter);
+ if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) {
+ if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_ERROR) {
+ BT_COMP_LOGE_APPEND_CAUSE(self_comp, "Failed to create viewer session");
+ } else if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED) {
+ /*
+ * Interruption in the _iter_init() method is not
+ * supported. Return an error.
+ */
+ BT_COMP_LOGE_APPEND_CAUSE(self_comp, "Interrupted when creating viewer session");
+ }
+ goto error;
+ }
+
+ if (lttng_live_msg_iter->sessions->len == 0) {
+ switch (lttng_live->params.sess_not_found_act) {
+ case SESSION_NOT_FOUND_ACTION_CONTINUE:
+ BT_COMP_LOGI(
+ "Unable to connect to the requested live viewer session. Keep trying to connect because of "
+ "%s=\"%s\" component parameter: url=\"%s\"",
+ SESS_NOT_FOUND_ACTION_PARAM, SESS_NOT_FOUND_ACTION_CONTINUE_STR,
+ lttng_live->params.url->str);
+ break;
+ case SESSION_NOT_FOUND_ACTION_FAIL:
+ BT_COMP_LOGE_APPEND_CAUSE(
+ self_comp,
+ "Unable to connect to the requested live viewer session. Fail the message iterator initialization because of %s=\"%s\" "
+ "component parameter: url =\"%s\"",
+ SESS_NOT_FOUND_ACTION_PARAM, SESS_NOT_FOUND_ACTION_FAIL_STR,
+ lttng_live->params.url->str);
+ goto error;
+ case SESSION_NOT_FOUND_ACTION_END:
+ BT_COMP_LOGI(
+ "Unable to connect to the requested live viewer session. End gracefully at the first _next() "
+ "call because of %s=\"%s\" component parameter: "
+ "url=\"%s\"",
+ SESS_NOT_FOUND_ACTION_PARAM, SESS_NOT_FOUND_ACTION_END_STR,
+ lttng_live->params.url->str);
+ break;
+ default:
+ bt_common_abort();
+ }
+ }
+
+ bt_self_message_iterator_set_data(self_msg_it, lttng_live_msg_iter);
+ status = BT_MESSAGE_ITERATOR_CLASS_INITIALIZE_METHOD_STATUS_OK;
+ goto end;
error:
- status = BT_MESSAGE_ITERATOR_CLASS_INITIALIZE_METHOD_STATUS_ERROR;
- lttng_live_msg_iter_destroy(lttng_live_msg_iter);
+ status = BT_MESSAGE_ITERATOR_CLASS_INITIALIZE_METHOD_STATUS_ERROR;
+ lttng_live_msg_iter_destroy(lttng_live_msg_iter);
end:
- return status;
+ return status;
}
static struct bt_param_validation_map_value_entry_descr list_sessions_params[] = {
- { URL_PARAM, BT_PARAM_VALIDATION_MAP_VALUE_ENTRY_MANDATORY,
- { bt_param_validation_value_descr::string_t } },
- BT_PARAM_VALIDATION_MAP_VALUE_ENTRY_END
-};
-
-static
-bt_component_class_query_method_status lttng_live_query_list_sessions(
- const bt_value *params, const bt_value **result,
- bt_self_component_class *self_comp_class,
- bt_logging_level log_level)
+ {URL_PARAM,
+ BT_PARAM_VALIDATION_MAP_VALUE_ENTRY_MANDATORY,
+ {bt_param_validation_value_descr::string_t}},
+ BT_PARAM_VALIDATION_MAP_VALUE_ENTRY_END};
+
+static bt_component_class_query_method_status
+lttng_live_query_list_sessions(const bt_value *params, const bt_value **result,
+ bt_self_component_class *self_comp_class, bt_logging_level log_level)
{
- bt_component_class_query_method_status status;
- const bt_value *url_value = NULL;
- const char *url;
- struct live_viewer_connection *viewer_connection = NULL;
- enum lttng_live_viewer_status viewer_status;
- enum bt_param_validation_status validation_status;
- gchar *validate_error = NULL;
-
- validation_status = bt_param_validation_validate(params,
- list_sessions_params, &validate_error);
- if (validation_status == BT_PARAM_VALIDATION_STATUS_MEMORY_ERROR) {
- status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_MEMORY_ERROR;
- goto error;
- } else if (validation_status == BT_PARAM_VALIDATION_STATUS_VALIDATION_ERROR) {
- status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR;
- BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class, "%s",
- validate_error);
- goto error;
- }
-
- url_value = bt_value_map_borrow_entry_value_const(params, URL_PARAM);
- url = bt_value_string_get(url_value);
-
- viewer_status = live_viewer_connection_create(NULL, self_comp_class,
- log_level, url, true, NULL, &viewer_connection);
- if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) {
- if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_ERROR) {
- BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class,
- "Failed to create viewer connection");
- status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR;
- } else if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED) {
- status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_AGAIN;
- } else {
- bt_common_abort();
- }
- goto error;
- }
-
- status = live_viewer_connection_list_sessions(viewer_connection,
- result);
- if (status != BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_OK) {
- BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class,
- "Failed to list viewer sessions");
- goto error;
- }
-
- goto end;
+ bt_component_class_query_method_status status;
+ const bt_value *url_value = NULL;
+ const char *url;
+ struct live_viewer_connection *viewer_connection = NULL;
+ enum lttng_live_viewer_status viewer_status;
+ enum bt_param_validation_status validation_status;
+ gchar *validate_error = NULL;
+
+ validation_status = bt_param_validation_validate(params, list_sessions_params, &validate_error);
+ if (validation_status == BT_PARAM_VALIDATION_STATUS_MEMORY_ERROR) {
+ status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_MEMORY_ERROR;
+ goto error;
+ } else if (validation_status == BT_PARAM_VALIDATION_STATUS_VALIDATION_ERROR) {
+ status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR;
+ BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class, "%s", validate_error);
+ goto error;
+ }
+
+ url_value = bt_value_map_borrow_entry_value_const(params, URL_PARAM);
+ url = bt_value_string_get(url_value);
+
+ viewer_status = live_viewer_connection_create(NULL, self_comp_class, log_level, url, true, NULL,
+ &viewer_connection);
+ if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) {
+ if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_ERROR) {
+ BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class, "Failed to create viewer connection");
+ status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR;
+ } else if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED) {
+ status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_AGAIN;
+ } else {
+ bt_common_abort();
+ }
+ goto error;
+ }
+
+ status = live_viewer_connection_list_sessions(viewer_connection, result);
+ if (status != BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_OK) {
+ BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class, "Failed to list viewer sessions");
+ goto error;
+ }
+
+ goto end;
error:
- BT_VALUE_PUT_REF_AND_RESET(*result);
+ BT_VALUE_PUT_REF_AND_RESET(*result);
- if (status >= 0) {
- status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR;
- }
+ if (status >= 0) {
+ status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR;
+ }
end:
- if (viewer_connection) {
- live_viewer_connection_destroy(viewer_connection);
- }
+ if (viewer_connection) {
+ live_viewer_connection_destroy(viewer_connection);
+ }
- g_free(validate_error);
+ g_free(validate_error);
- return status;
+ return status;
}
-static
-bt_component_class_query_method_status lttng_live_query_support_info(
- const bt_value *params, const bt_value **result,
- bt_self_component_class *self_comp_class,
- bt_logging_level log_level)
+static bt_component_class_query_method_status
+lttng_live_query_support_info(const bt_value *params, const bt_value **result,
+ bt_self_component_class *self_comp_class, bt_logging_level log_level)
{
- bt_component_class_query_method_status status =
- BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_OK;
- const bt_value *input_type_value;
- const bt_value *input_value;
- double weight = 0;
- struct bt_common_lttng_live_url_parts parts = { 0 };
-
- /* Used by the logging macros */
- __attribute__((unused)) bt_self_component *self_comp = NULL;
-
- *result = NULL;
- input_type_value = bt_value_map_borrow_entry_value_const(params,
- "type");
- if (!input_type_value) {
- BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class,
- "Missing expected `type` parameter.");
- goto error;
- }
-
- if (!bt_value_is_string(input_type_value)) {
- BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class,
- "`type` parameter is not a string value.");
- goto error;
- }
-
- if (strcmp(bt_value_string_get(input_type_value), "string") != 0) {
- /* We don't handle file system paths */
- goto create_result;
- }
-
- input_value = bt_value_map_borrow_entry_value_const(params, "input");
- if (!input_value) {
- BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class,
- "Missing expected `input` parameter.");
- goto error;
- }
-
- if (!bt_value_is_string(input_value)) {
- BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class,
- "`input` parameter is not a string value.");
- goto error;
- }
-
- parts = bt_common_parse_lttng_live_url(bt_value_string_get(input_value),
- NULL, 0);
- if (parts.session_name) {
- /*
- * Looks pretty much like an LTTng live URL: we got the
- * session name part, which forms a complete URL.
- */
- weight = .75;
- }
+ bt_component_class_query_method_status status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_OK;
+ const bt_value *input_type_value;
+ const bt_value *input_value;
+ double weight = 0;
+ struct bt_common_lttng_live_url_parts parts = {0};
+
+ /* Used by the logging macros */
+ __attribute__((unused)) bt_self_component *self_comp = NULL;
+
+ *result = NULL;
+ input_type_value = bt_value_map_borrow_entry_value_const(params, "type");
+ if (!input_type_value) {
+ BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class, "Missing expected `type` parameter.");
+ goto error;
+ }
+
+ if (!bt_value_is_string(input_type_value)) {
+ BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class, "`type` parameter is not a string value.");
+ goto error;
+ }
+
+ if (strcmp(bt_value_string_get(input_type_value), "string") != 0) {
+ /* We don't handle file system paths */
+ goto create_result;
+ }
+
+ input_value = bt_value_map_borrow_entry_value_const(params, "input");
+ if (!input_value) {
+ BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class, "Missing expected `input` parameter.");
+ goto error;
+ }
+
+ if (!bt_value_is_string(input_value)) {
+ BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class,
+ "`input` parameter is not a string value.");
+ goto error;
+ }
+
+ parts = bt_common_parse_lttng_live_url(bt_value_string_get(input_value), NULL, 0);
+ if (parts.session_name) {
+ /*
+ * Looks pretty much like an LTTng live URL: we got the
+ * session name part, which forms a complete URL.
+ */
+ weight = .75;
+ }
create_result:
- *result = bt_value_real_create_init(weight);
- if (!*result) {
- status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_MEMORY_ERROR;
- goto error;
- }
+ *result = bt_value_real_create_init(weight);
+ if (!*result) {
+ status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_MEMORY_ERROR;
+ goto error;
+ }
- goto end;
+ goto end;
error:
- if (status >= 0) {
- status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR;
- }
+ if (status >= 0) {
+ status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR;
+ }
- BT_ASSERT(!*result);
+ BT_ASSERT(!*result);
end:
- bt_common_destroy_lttng_live_url_parts(&parts);
- return status;
+ bt_common_destroy_lttng_live_url_parts(&parts);
+ return status;
}
BT_HIDDEN
-bt_component_class_query_method_status lttng_live_query(
- bt_self_component_class_source *comp_class,
- bt_private_query_executor *priv_query_exec,
- const char *object, const bt_value *params,
- __attribute__((unused)) void *method_data,
- const bt_value **result)
+bt_component_class_query_method_status lttng_live_query(bt_self_component_class_source *comp_class,
+ bt_private_query_executor *priv_query_exec,
+ const char *object, const bt_value *params,
+ __attribute__((unused)) void *method_data,
+ const bt_value **result)
{
- bt_component_class_query_method_status status =
- BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_OK;
- bt_self_component *self_comp = NULL;
- bt_self_component_class *self_comp_class =
- bt_self_component_class_source_as_self_component_class(comp_class);
- bt_logging_level log_level = bt_query_executor_get_logging_level(
- bt_private_query_executor_as_query_executor_const(
- priv_query_exec));
-
- if (strcmp(object, "sessions") == 0) {
- status = lttng_live_query_list_sessions(params, result,
- self_comp_class, log_level);
- } else if (strcmp(object, "babeltrace.support-info") == 0) {
- status = lttng_live_query_support_info(params, result,
- self_comp_class, log_level);
- } else {
- BT_COMP_LOGI("Unknown query object `%s`", object);
- status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_UNKNOWN_OBJECT;
- goto end;
- }
+ bt_component_class_query_method_status status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_OK;
+ bt_self_component *self_comp = NULL;
+ bt_self_component_class *self_comp_class =
+ bt_self_component_class_source_as_self_component_class(comp_class);
+ bt_logging_level log_level = bt_query_executor_get_logging_level(
+ bt_private_query_executor_as_query_executor_const(priv_query_exec));
+
+ if (strcmp(object, "sessions") == 0) {
+ status = lttng_live_query_list_sessions(params, result, self_comp_class, log_level);
+ } else if (strcmp(object, "babeltrace.support-info") == 0) {
+ status = lttng_live_query_support_info(params, result, self_comp_class, log_level);
+ } else {
+ BT_COMP_LOGI("Unknown query object `%s`", object);
+ status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_UNKNOWN_OBJECT;
+ goto end;
+ }
end:
- return status;
+ return status;
}
-static
-void lttng_live_component_destroy_data(struct lttng_live_component *lttng_live)
+static void lttng_live_component_destroy_data(struct lttng_live_component *lttng_live)
{
- if (!lttng_live) {
- return;
- }
- if (lttng_live->params.url) {
- g_string_free(lttng_live->params.url, TRUE);
- }
- g_free(lttng_live);
+ if (!lttng_live) {
+ return;
+ }
+ if (lttng_live->params.url) {
+ g_string_free(lttng_live->params.url, TRUE);
+ }
+ g_free(lttng_live);
}
BT_HIDDEN
void lttng_live_component_finalize(bt_self_component_source *component)
{
- lttng_live_component *data =
- (lttng_live_component *) bt_self_component_get_data(
- bt_self_component_source_as_self_component(component));
-
- if (!data) {
- return;
- }
- lttng_live_component_destroy_data(data);
+ lttng_live_component *data = (lttng_live_component *) bt_self_component_get_data(
+ bt_self_component_source_as_self_component(component));
+
+ if (!data) {
+ return;
+ }
+ lttng_live_component_destroy_data(data);
}
-static
-enum session_not_found_action parse_session_not_found_action_param(
- const bt_value *no_session_param)
+static enum session_not_found_action
+parse_session_not_found_action_param(const bt_value *no_session_param)
{
- enum session_not_found_action action;
- const char *no_session_act_str = bt_value_string_get(no_session_param);
-
- if (strcmp(no_session_act_str, SESS_NOT_FOUND_ACTION_CONTINUE_STR) == 0) {
- action = SESSION_NOT_FOUND_ACTION_CONTINUE;
- } else if (strcmp(no_session_act_str, SESS_NOT_FOUND_ACTION_FAIL_STR) == 0) {
- action = SESSION_NOT_FOUND_ACTION_FAIL;
- } else {
- BT_ASSERT(strcmp(no_session_act_str, SESS_NOT_FOUND_ACTION_END_STR) == 0);
- action = SESSION_NOT_FOUND_ACTION_END;
- }
-
- return action;
+ enum session_not_found_action action;
+ const char *no_session_act_str = bt_value_string_get(no_session_param);
+
+ if (strcmp(no_session_act_str, SESS_NOT_FOUND_ACTION_CONTINUE_STR) == 0) {
+ action = SESSION_NOT_FOUND_ACTION_CONTINUE;
+ } else if (strcmp(no_session_act_str, SESS_NOT_FOUND_ACTION_FAIL_STR) == 0) {
+ action = SESSION_NOT_FOUND_ACTION_FAIL;
+ } else {
+ BT_ASSERT(strcmp(no_session_act_str, SESS_NOT_FOUND_ACTION_END_STR) == 0);
+ action = SESSION_NOT_FOUND_ACTION_END;
+ }
+
+ return action;
}
-static bt_param_validation_value_descr inputs_elem_descr{
- bt_param_validation_value_descr::string_t,
+static bt_param_validation_value_descr inputs_elem_descr {
+ bt_param_validation_value_descr::string_t,
};
static const char *sess_not_found_action_choices[] = {
- SESS_NOT_FOUND_ACTION_CONTINUE_STR,
- SESS_NOT_FOUND_ACTION_FAIL_STR,
- SESS_NOT_FOUND_ACTION_END_STR,
+ SESS_NOT_FOUND_ACTION_CONTINUE_STR,
+ SESS_NOT_FOUND_ACTION_FAIL_STR,
+ SESS_NOT_FOUND_ACTION_END_STR,
};
static struct bt_param_validation_map_value_entry_descr params_descr[] = {
- { INPUTS_PARAM, BT_PARAM_VALIDATION_MAP_VALUE_ENTRY_MANDATORY,
- { bt_param_validation_value_descr::array_t,
- 1, 1, inputs_elem_descr } },
- { SESS_NOT_FOUND_ACTION_PARAM, BT_PARAM_VALIDATION_MAP_VALUE_ENTRY_OPTIONAL,
- { bt_param_validation_value_descr::string_t,
- sess_not_found_action_choices } },
- BT_PARAM_VALIDATION_MAP_VALUE_ENTRY_END
-};
-
-static
-bt_component_class_initialize_method_status lttng_live_component_create(
- const bt_value *params,
- bt_logging_level log_level,
- bt_self_component *self_comp,
- struct lttng_live_component **component)
+ {INPUTS_PARAM,
+ BT_PARAM_VALIDATION_MAP_VALUE_ENTRY_MANDATORY,
+ {bt_param_validation_value_descr::array_t, 1, 1, inputs_elem_descr}},
+ {SESS_NOT_FOUND_ACTION_PARAM,
+ BT_PARAM_VALIDATION_MAP_VALUE_ENTRY_OPTIONAL,
+ {bt_param_validation_value_descr::string_t, sess_not_found_action_choices}},
+ BT_PARAM_VALIDATION_MAP_VALUE_ENTRY_END};
+
+static bt_component_class_initialize_method_status
+lttng_live_component_create(const bt_value *params, bt_logging_level log_level,
+ bt_self_component *self_comp, struct lttng_live_component **component)
{
- struct lttng_live_component *lttng_live = NULL;
- const bt_value *inputs_value;
- const bt_value *url_value;
- const bt_value *value;
- const char *url;
- enum bt_param_validation_status validation_status;
- gchar *validation_error = NULL;
- bt_component_class_initialize_method_status status;
-
- validation_status = bt_param_validation_validate(params, params_descr,
- &validation_error);
- if (validation_status == BT_PARAM_VALIDATION_STATUS_MEMORY_ERROR) {
- status = BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_MEMORY_ERROR;
- goto error;
- } else if (validation_status == BT_PARAM_VALIDATION_STATUS_VALIDATION_ERROR) {
- BT_COMP_LOGE_APPEND_CAUSE(self_comp, "%s", validation_error);
- status = BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_ERROR;
- goto error;
- }
-
- lttng_live = g_new0(struct lttng_live_component, 1);
- if (!lttng_live) {
- status = BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_MEMORY_ERROR;
- goto end;
- }
- lttng_live->log_level = log_level;
- lttng_live->self_comp = self_comp;
- lttng_live->max_query_size = MAX_QUERY_SIZE;
- lttng_live->has_msg_iter = false;
-
- inputs_value =
- bt_value_map_borrow_entry_value_const(params, INPUTS_PARAM);
- url_value =
- bt_value_array_borrow_element_by_index_const(inputs_value, 0);
- url = bt_value_string_get(url_value);
-
- lttng_live->params.url = g_string_new(url);
- if (!lttng_live->params.url) {
- status = BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_MEMORY_ERROR;
- goto error;
- }
-
- value = bt_value_map_borrow_entry_value_const(params,
- SESS_NOT_FOUND_ACTION_PARAM);
- if (value) {
- lttng_live->params.sess_not_found_act =
- parse_session_not_found_action_param(value);
- } else {
- BT_COMP_LOGI("Optional `%s` parameter is missing: "
- "defaulting to `%s`.",
- SESS_NOT_FOUND_ACTION_PARAM,
- SESS_NOT_FOUND_ACTION_CONTINUE_STR);
- lttng_live->params.sess_not_found_act =
- SESSION_NOT_FOUND_ACTION_CONTINUE;
- }
-
- status = BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_OK;
- goto end;
+ struct lttng_live_component *lttng_live = NULL;
+ const bt_value *inputs_value;
+ const bt_value *url_value;
+ const bt_value *value;
+ const char *url;
+ enum bt_param_validation_status validation_status;
+ gchar *validation_error = NULL;
+ bt_component_class_initialize_method_status status;
+
+ validation_status = bt_param_validation_validate(params, params_descr, &validation_error);
+ if (validation_status == BT_PARAM_VALIDATION_STATUS_MEMORY_ERROR) {
+ status = BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_MEMORY_ERROR;
+ goto error;
+ } else if (validation_status == BT_PARAM_VALIDATION_STATUS_VALIDATION_ERROR) {
+ BT_COMP_LOGE_APPEND_CAUSE(self_comp, "%s", validation_error);
+ status = BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_ERROR;
+ goto error;
+ }
+
+ lttng_live = g_new0(struct lttng_live_component, 1);
+ if (!lttng_live) {
+ status = BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_MEMORY_ERROR;
+ goto end;
+ }
+ lttng_live->log_level = log_level;
+ lttng_live->self_comp = self_comp;
+ lttng_live->max_query_size = MAX_QUERY_SIZE;
+ lttng_live->has_msg_iter = false;
+
+ inputs_value = bt_value_map_borrow_entry_value_const(params, INPUTS_PARAM);
+ url_value = bt_value_array_borrow_element_by_index_const(inputs_value, 0);
+ url = bt_value_string_get(url_value);
+
+ lttng_live->params.url = g_string_new(url);
+ if (!lttng_live->params.url) {
+ status = BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_MEMORY_ERROR;
+ goto error;
+ }
+
+ value = bt_value_map_borrow_entry_value_const(params, SESS_NOT_FOUND_ACTION_PARAM);
+ if (value) {
+ lttng_live->params.sess_not_found_act = parse_session_not_found_action_param(value);
+ } else {
+ BT_COMP_LOGI("Optional `%s` parameter is missing: "
+ "defaulting to `%s`.",
+ SESS_NOT_FOUND_ACTION_PARAM, SESS_NOT_FOUND_ACTION_CONTINUE_STR);
+ lttng_live->params.sess_not_found_act = SESSION_NOT_FOUND_ACTION_CONTINUE;
+ }
+
+ status = BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_OK;
+ goto end;
error:
- lttng_live_component_destroy_data(lttng_live);
- lttng_live = NULL;
+ lttng_live_component_destroy_data(lttng_live);
+ lttng_live = NULL;
end:
- g_free(validation_error);
+ g_free(validation_error);
- *component = lttng_live;
- return status;
+ *component = lttng_live;
+ return status;
}
BT_HIDDEN
-bt_component_class_initialize_method_status lttng_live_component_init(
- bt_self_component_source *self_comp_src,
- bt_self_component_source_configuration *config,
- const bt_value *params,
- __attribute__((unused)) void *init_method_data)
+bt_component_class_initialize_method_status
+lttng_live_component_init(bt_self_component_source *self_comp_src,
+ bt_self_component_source_configuration *config, const bt_value *params,
+ __attribute__((unused)) void *init_method_data)
{
- struct lttng_live_component *lttng_live;
- bt_component_class_initialize_method_status ret;
- bt_self_component *self_comp =
- bt_self_component_source_as_self_component(self_comp_src);
- bt_logging_level log_level = bt_component_get_logging_level(
- bt_self_component_as_component(self_comp));
- bt_self_component_add_port_status add_port_status;
-
- ret = lttng_live_component_create(params, log_level, self_comp, <tng_live);
- if (ret != BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_OK) {
- goto error;
- }
-
- add_port_status = bt_self_component_source_add_output_port(
- self_comp_src, "out", NULL, NULL);
- if (add_port_status != BT_SELF_COMPONENT_ADD_PORT_STATUS_OK) {
- ret = (bt_component_class_initialize_method_status) add_port_status;
- goto end;
- }
-
- bt_self_component_set_data(self_comp, lttng_live);
- goto end;
+ struct lttng_live_component *lttng_live;
+ bt_component_class_initialize_method_status ret;
+ bt_self_component *self_comp = bt_self_component_source_as_self_component(self_comp_src);
+ bt_logging_level log_level =
+ bt_component_get_logging_level(bt_self_component_as_component(self_comp));
+ bt_self_component_add_port_status add_port_status;
+
+ ret = lttng_live_component_create(params, log_level, self_comp, <tng_live);
+ if (ret != BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_OK) {
+ goto error;
+ }
+
+ add_port_status = bt_self_component_source_add_output_port(self_comp_src, "out", NULL, NULL);
+ if (add_port_status != BT_SELF_COMPONENT_ADD_PORT_STATUS_OK) {
+ ret = (bt_component_class_initialize_method_status) add_port_status;
+ goto end;
+ }
+
+ bt_self_component_set_data(self_comp, lttng_live);
+ goto end;
error:
- lttng_live_component_destroy_data(lttng_live);
- lttng_live = NULL;
+ lttng_live_component_destroy_data(lttng_live);
+ lttng_live = NULL;
end:
- return ret;
+ return ret;
}
projects / babeltrace.git / blobdiff