+++ /dev/null
-/*
- * Copyright 2019 - Francis Deslauriers <francis.deslauriers@efficios.com>
- * Copyright 2016 - Philippe Proulx <pproulx@efficios.com>
- * Copyright 2010-2011 - EfficiOS Inc. and Linux Foundation
- *
- * Some functions are based on older functions written by Mathieu Desnoyers.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- */
-
-#define BT_LOG_TAG "PLUGIN-CTF-LTTNG-LIVE-SRC-METADATA"
-#include "logging.h"
-
-#include <stdio.h>
-#include <stdint.h>
-#include <stdlib.h>
-#include <stdbool.h>
-#include <glib.h>
-#include <babeltrace2/compat/memstream-internal.h>
-#include <babeltrace2/babeltrace.h>
-
-#include "metadata.h"
-#include "../common/metadata/decoder.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)
-{
- 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_LOGE("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(sc);
-
- cc = bt_stream_class_borrow_default_clock_class_const(sc);
- if (cc) {
- goto end;
- }
- }
-end:
- BT_ASSERT(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;
- struct lttng_live_component *lttng_live =
- session->lttng_live_msg_iter->lttng_live_comp;
- ssize_t ret = 0;
- size_t size, len_read = 0;
- char *metadata_buf = NULL;
- FILE *fp = NULL;
- enum ctf_metadata_decoder_status decoder_status;
- enum lttng_live_iterator_status status =
- LTTNG_LIVE_ITERATOR_STATUS_OK;
-
- /* 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 (!metadata->trace) {
- trace->new_metadata_needed = false;
- }
-
- if (!trace->new_metadata_needed) {
- goto end;
- }
-
- /* Open for writing */
- fp = bt_open_memstream(&metadata_buf, &size);
- if (!fp) {
- BT_LOGE("Metadata open_memstream: %s", strerror(errno));
- goto error;
- }
-
- /* Grab all available metadata. */
- do {
- /*
- * get_one_metadata_packet returns the number of bytes
- * received, 0 when we have received everything, a
- * negative value on error.
- */
- ret = lttng_live_get_one_metadata_packet(trace, fp);
- if (ret > 0) {
- len_read += ret;
- }
- } while (ret > 0);
-
- /*
- * Consider metadata closed as soon as we get an error reading
- * it (e.g. cannot be found).
- */
- if (ret < 0) {
- if (!metadata->closed) {
- metadata->closed = true;
- /*
- * Release our reference on the trace as soon as
- * we know the metadata stream is not available
- * anymore. This won't necessarily teardown the
- * metadata objects immediately, but only when
- * the data streams are done.
- */
- metadata->trace = NULL;
- }
- if (errno == EINTR) {
- if (lttng_live_graph_is_canceled(lttng_live)) {
- status = LTTNG_LIVE_ITERATOR_STATUS_AGAIN;
- goto end;
- }
- }
- }
-
- if (bt_close_memstream(&metadata_buf, &size, fp)) {
- BT_LOGE("bt_close_memstream: %s", strerror(errno));
- }
- ret = 0;
- fp = NULL;
-
- if (len_read == 0) {
- if (!trace->trace) {
- status = LTTNG_LIVE_ITERATOR_STATUS_AGAIN;
- goto end;
- }
- trace->new_metadata_needed = false;
- goto end;
- }
-
- fp = bt_fmemopen(metadata_buf, len_read, "rb");
- if (!fp) {
- BT_LOGE("Cannot memory-open metadata buffer: %s",
- strerror(errno));
- goto error;
- }
-
- /*
- * The call to ctf_metadata_decoder_decode will append new metadata to
- * our current trace class.
- */
- decoder_status = ctf_metadata_decoder_decode(metadata->decoder, fp);
- switch (decoder_status) {
- case CTF_METADATA_DECODER_STATUS_OK:
- if (!trace->trace_class) {
- trace->trace_class =
- ctf_metadata_decoder_get_ir_trace_class(
- metadata->decoder);
- trace->trace = bt_trace_create(trace->trace_class);
- if (!stream_classes_all_have_default_clock_class(
- trace->trace_class)) {
- /* Error logged in function. */
- goto error;
- }
- trace->clock_class =
- borrow_any_clock_class(trace->trace_class);
- }
- trace->new_metadata_needed = false;
-
- break;
- case CTF_METADATA_DECODER_STATUS_INCOMPLETE:
- status = LTTNG_LIVE_ITERATOR_STATUS_AGAIN;
- break;
- case CTF_METADATA_DECODER_STATUS_ERROR:
- case CTF_METADATA_DECODER_STATUS_INVAL_VERSION:
- case CTF_METADATA_DECODER_STATUS_IR_VISITOR_ERROR:
- goto error;
- }
-
- goto end;
-error:
- status = LTTNG_LIVE_ITERATOR_STATUS_ERROR;
-end:
- if (fp) {
- int closeret;
-
- closeret = fclose(fp);
- if (closeret) {
- BT_LOGE("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)
-{
- struct lttng_live_component *lttng_live =
- session->lttng_live_msg_iter->lttng_live_comp;
- struct lttng_live_metadata *metadata = NULL;
- struct lttng_live_trace *trace;
- const char *match;
-
- metadata = g_new0(struct lttng_live_metadata, 1);
- if (!metadata) {
- return -1;
- }
- metadata->stream_id = stream_id;
-
- match = strstr(trace_name, session->session_name->str);
- if (!match) {
- goto error;
- }
-
- metadata->decoder = ctf_metadata_decoder_create(
- lttng_live->self_comp, NULL);
- if (!metadata->decoder) {
- goto error;
- }
- trace = lttng_live_borrow_trace(session, ctf_trace_id);
- if (!trace) {
- goto error;
- }
- metadata->trace = trace;
- 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);
-}
projects / babeltrace.git / blobdiff