+++ /dev/null
-/*
- * SPDX-License-Identifier: MIT
- *
- * Copyright 2019 Francis Deslauriers <francis.deslauriers@efficios.com>
- * Copyright 2016 Philippe Proulx <pproulx@efficios.com>
- * Copyright 2010-2011 EfficiOS Inc. and Linux Foundation
- */
-
-#define BT_COMP_LOG_SELF_COMP self_comp
-#define BT_LOG_OUTPUT_LEVEL log_level
-#define BT_LOG_TAG "PLUGIN/SRC.CTF.LTTNG-LIVE/META"
-#include "logging/comp-logging.h"
-
-#include <stdio.h>
-#include <stdint.h>
-#include <stdlib.h>
-#include <stdbool.h>
-#include <glib.h>
-#include "compat/memstream.h"
-#include <babeltrace2/babeltrace.h>
-
-#include "metadata.h"
-#include "../common/metadata/decoder.h"
-#include "../common/metadata/ctf-meta-configure-ir-trace.h"
-
-#define TSDL_MAGIC 0x75d11d57
-
-struct packet_header {
- uint32_t magic;
- uint8_t uuid[16];
- uint32_t checksum;
- uint32_t content_size;
- uint32_t packet_size;
- uint8_t compression_scheme;
- uint8_t encryption_scheme;
- uint8_t checksum_scheme;
- uint8_t major;
- uint8_t minor;
-} __attribute__((__packed__));
-
-
-static
-bool stream_classes_all_have_default_clock_class(bt_trace_class *tc,
- bt_logging_level log_level,
- bt_self_component *self_comp)
-{
- uint64_t i, sc_count;
- const bt_clock_class *cc = NULL;
- const bt_stream_class *sc;
- bool ret = true;
-
- sc_count = bt_trace_class_get_stream_class_count(tc);
- for (i = 0; i < sc_count; i++) {
- sc = bt_trace_class_borrow_stream_class_by_index_const(tc, i);
-
- BT_ASSERT(sc);
-
- cc = bt_stream_class_borrow_default_clock_class_const(sc);
- if (!cc) {
- ret = false;
- BT_COMP_LOGE_APPEND_CAUSE(self_comp,
- "Stream class doesn't have a default clock class: "
- "sc-id=%" PRIu64 ", sc-name=\"%s\"",
- bt_stream_class_get_id(sc),
- bt_stream_class_get_name(sc));
- goto end;
- }
- }
-
-end:
- return ret;
-}
-/*
- * Iterate over the stream classes and returns the first clock class
- * encountered. This is useful to create message iterator inactivity message as
- * we don't need a particular clock class.
- */
-static
-const bt_clock_class *borrow_any_clock_class(bt_trace_class *tc)
-{
- uint64_t i, sc_count;
- const bt_clock_class *cc = NULL;
- const bt_stream_class *sc;
-
- sc_count = bt_trace_class_get_stream_class_count(tc);
- for (i = 0; i < sc_count; i++) {
- sc = bt_trace_class_borrow_stream_class_by_index_const(tc, i);
- BT_ASSERT_DBG(sc);
-
- cc = bt_stream_class_borrow_default_clock_class_const(sc);
- if (cc) {
- goto end;
- }
- }
-end:
- BT_ASSERT_DBG(cc);
- return cc;
-}
-
-BT_HIDDEN
-enum lttng_live_iterator_status lttng_live_metadata_update(
- struct lttng_live_trace *trace)
-{
- struct lttng_live_session *session = trace->session;
- struct lttng_live_metadata *metadata = trace->metadata;
- size_t size, len_read = 0;
- char *metadata_buf = NULL;
- bool keep_receiving;
- FILE *fp = NULL;
- enum ctf_metadata_decoder_status decoder_status;
- enum lttng_live_iterator_status status =
- LTTNG_LIVE_ITERATOR_STATUS_OK;
- bt_logging_level log_level = trace->log_level;
- bt_self_component *self_comp = trace->self_comp;
- enum lttng_live_get_one_metadata_status metadata_status;
-
- BT_COMP_LOGD("Updating metadata for trace: session-id=%" PRIu64
- ", trace-id=%" PRIu64, session->id, trace->id);
-
- /* No metadata stream yet. */
- if (!metadata) {
- if (session->new_streams_needed) {
- status = LTTNG_LIVE_ITERATOR_STATUS_AGAIN;
- } else {
- session->new_streams_needed = true;
- status = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE;
- }
- goto end;
- }
-
- if (trace->metadata_stream_state != LTTNG_LIVE_METADATA_STREAM_STATE_NEEDED) {
- goto end;
- }
-
- /*
- * Open a new write only file handle to populate the `metadata_buf`
- * memory buffer so we can write in loop in it easily.
- */
- fp = bt_open_memstream(&metadata_buf, &size);
- if (!fp) {
- if (errno == EINTR &&
- lttng_live_graph_is_canceled(session->lttng_live_msg_iter)) {
- session->lttng_live_msg_iter->was_interrupted = true;
- status = LTTNG_LIVE_ITERATOR_STATUS_AGAIN;
- } else {
- BT_COMP_LOGE_APPEND_CAUSE_ERRNO(self_comp,
- "Metadata open_memstream", ".");
- status = LTTNG_LIVE_ITERATOR_STATUS_ERROR;
- }
- goto end;
- }
-
- keep_receiving = true;
- /* Grab all available metadata. */
- while (keep_receiving) {
- size_t reply_len = 0;
- /*
- * lttng_live_get_one_metadata_packet() asks the Relay Daemon
- * for new metadata. If new metadata is received, the function
- * writes it to the provided file handle and updates the
- * reply_len output parameter. We call this function in loop
- * until it returns _END meaning that no new metadata is
- * available.
- * We may receive a _CLOSED status if the metadata stream we
- * are requesting is no longer available on the relay.
- * If we receive an _ERROR status, it means there was a
- * networking, allocating, or some other unrecoverable error.
- */
- metadata_status = lttng_live_get_one_metadata_packet(trace, fp,
- &reply_len);
-
- switch (metadata_status) {
- case LTTNG_LIVE_GET_ONE_METADATA_STATUS_OK:
- len_read += reply_len;
- break;
- case LTTNG_LIVE_GET_ONE_METADATA_STATUS_END:
- keep_receiving = false;
- break;
- case LTTNG_LIVE_GET_ONE_METADATA_STATUS_CLOSED:
- BT_COMP_LOGD("Metadata stream was closed by the Relay, the trace is no longer active: "
- "trace-id=%"PRIu64", metadata-stream-id=%"PRIu64,
- trace->id, metadata->stream_id);
- /*
- * The stream was closed and we received everything
- * there was to receive for this metadata stream.
- * We go on with the decoding of what we received. So
- * that data stream can be decoded.
- */
- keep_receiving = false;
- trace->metadata_stream_state = LTTNG_LIVE_METADATA_STREAM_STATE_CLOSED;
- break;
- case LTTNG_LIVE_GET_ONE_METADATA_STATUS_ERROR:
- BT_COMP_LOGE_APPEND_CAUSE(self_comp,
- "Error getting one trace metadata packet: "
- "trace-id=%"PRIu64, trace->id);
- goto error;
- default:
- bt_common_abort();
- }
- }
-
- /* The memory buffer `metadata_buf` contains all the metadata. */
- if (bt_close_memstream(&metadata_buf, &size, fp)) {
- BT_COMP_LOGW_ERRNO("Metadata bt_close_memstream", ".");
- }
-
- fp = NULL;
-
- if (len_read == 0) {
- if (!trace->trace) {
- status = LTTNG_LIVE_ITERATOR_STATUS_AGAIN;
- goto end;
- }
-
- /* The relay sent zero bytes of metdata. */
- trace->metadata_stream_state = LTTNG_LIVE_METADATA_STREAM_STATE_NOT_NEEDED;
- goto end;
- }
-
- /*
- * Open a new reading file handle on the `metadata_buf` and pass it to
- * the metadata decoder.
- */
- fp = bt_fmemopen(metadata_buf, len_read, "rb");
- if (!fp) {
- if (errno == EINTR &&
- lttng_live_graph_is_canceled(session->lttng_live_msg_iter)) {
- session->lttng_live_msg_iter->was_interrupted = true;
- status = LTTNG_LIVE_ITERATOR_STATUS_AGAIN;
- } else {
- BT_COMP_LOGE_APPEND_CAUSE_ERRNO(self_comp,
- "Cannot memory-open metadata buffer", ".");
- status = LTTNG_LIVE_ITERATOR_STATUS_ERROR;
- }
- goto end;
- }
-
- /*
- * The call to ctf_metadata_decoder_append_content() will append
- * new metadata to our current trace class.
- */
- BT_COMP_LOGD("Appending new metadata to the ctf_trace class");
- decoder_status = ctf_metadata_decoder_append_content(
- metadata->decoder, fp);
- switch (decoder_status) {
- case CTF_METADATA_DECODER_STATUS_OK:
- if (!trace->trace_class) {
- struct ctf_trace_class *tc =
- ctf_metadata_decoder_borrow_ctf_trace_class(
- metadata->decoder);
-
- trace->trace_class =
- ctf_metadata_decoder_get_ir_trace_class(
- metadata->decoder);
- trace->trace = bt_trace_create(trace->trace_class);
- if (!trace->trace) {
- BT_COMP_LOGE_APPEND_CAUSE(self_comp,
- "Failed to create bt_trace");
- goto error;
- }
- if (ctf_trace_class_configure_ir_trace(tc,
- trace->trace)) {
- BT_COMP_LOGE_APPEND_CAUSE(self_comp,
- "Failed to configure ctf trace class");
- goto error;
- }
- if (!stream_classes_all_have_default_clock_class(
- trace->trace_class, log_level,
- self_comp)) {
- /* Error logged in function. */
- goto error;
- }
- trace->clock_class =
- borrow_any_clock_class(trace->trace_class);
- }
-
- /* The metadata was updated succesfully. */
- trace->metadata_stream_state = LTTNG_LIVE_METADATA_STREAM_STATE_NOT_NEEDED;
-
- break;
- default:
- goto error;
- }
-
- goto end;
-
-error:
- status = LTTNG_LIVE_ITERATOR_STATUS_ERROR;
-end:
- if (fp) {
- int closeret;
-
- closeret = fclose(fp);
- if (closeret) {
- BT_COMP_LOGW_ERRNO("Error on fclose", ".");
- }
- }
- free(metadata_buf);
- return status;
-}
-
-BT_HIDDEN
-int lttng_live_metadata_create_stream(struct lttng_live_session *session,
- uint64_t ctf_trace_id, uint64_t stream_id,
- const char *trace_name)
-{
- bt_self_component *self_comp = session->self_comp;
- bt_logging_level log_level = session->log_level;
- struct lttng_live_metadata *metadata = NULL;
- struct lttng_live_trace *trace;
- struct ctf_metadata_decoder_config cfg = {
- .log_level = session->log_level,
- .self_comp = session->self_comp,
- .clock_class_offset_s = 0,
- .clock_class_offset_ns = 0,
- .create_trace_class = true,
- };
-
- metadata = g_new0(struct lttng_live_metadata, 1);
- if (!metadata) {
- return -1;
- }
- metadata->log_level = session->log_level;
- metadata->self_comp = session->self_comp;
- metadata->stream_id = stream_id;
-
- metadata->decoder = ctf_metadata_decoder_create(&cfg);
- if (!metadata->decoder) {
- BT_COMP_LOGE_APPEND_CAUSE(self_comp,
- "Failed to create CTF metadata decoder");
- goto error;
- }
- trace = lttng_live_session_borrow_or_create_trace_by_id(session,
- ctf_trace_id);
- if (!trace) {
- BT_COMP_LOGE_APPEND_CAUSE(self_comp,
- "Failed to borrow trace");
- goto error;
- }
- trace->metadata = metadata;
- return 0;
-
-error:
- ctf_metadata_decoder_destroy(metadata->decoder);
- g_free(metadata);
- return -1;
-}
-
-BT_HIDDEN
-void lttng_live_metadata_fini(struct lttng_live_trace *trace)
-{
- struct lttng_live_metadata *metadata = trace->metadata;
-
- if (!metadata) {
- return;
- }
- ctf_metadata_decoder_destroy(metadata->decoder);
- trace->metadata = NULL;
- g_free(metadata);
-}