--- /dev/null
+/*
+ * Copyright (C) 2013 - Julien Desfossez <jdesfossez@efficios.com>
+ * Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ *
+ * 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.
+ */
+
+#include <sys/socket.h>
+#include <sys/types.h>
+#include <netinet/in.h>
+#include <netdb.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <errno.h>
+#include <inttypes.h>
+#include <fcntl.h>
+#include <sys/mman.h>
+
+#include <babeltrace/ctf/ctf-index.h>
+
+#include <babeltrace/babeltrace.h>
+#include <babeltrace/ctf/events.h>
+#include <babeltrace/ctf/callbacks.h>
+#include <babeltrace/ctf/iterator.h>
+
+/* for packet_index */
+#include <babeltrace/ctf/types.h>
+
+#include <babeltrace/ctf/metadata.h>
+#include <babeltrace/ctf-text/types.h>
+#include <babeltrace/ctf/events-internal.h>
+#include <formats/ctf/events-private.h>
+
+#include "lttng-live-functions.h"
+#include "lttng-viewer.h"
+
+/*
+ * Memory allocation zeroed
+ */
+#define zmalloc(x) calloc(1, x)
+
+#ifndef max_t
+#define max_t(type, a, b) \
+ ((type) (a) > (type) (b) ? (type) (a) : (type) (b))
+#endif
+
+int lttng_live_connect_viewer(struct lttng_live_ctx *ctx, char *hostname,
+ int port)
+{
+ struct hostent *host;
+ struct sockaddr_in server_addr;
+ int ret;
+
+ host = gethostbyname(hostname);
+ if (!host) {
+ ret = -1;
+ goto end;
+ }
+
+ if ((ctx->control_sock = socket(AF_INET, SOCK_STREAM, 0)) == -1) {
+ perror("Socket");
+ ret = -1;
+ goto end;
+ }
+
+ server_addr.sin_family = AF_INET;
+ server_addr.sin_port = htons(port);
+ server_addr.sin_addr = *((struct in_addr *) host->h_addr);
+ bzero(&(server_addr.sin_zero), 8);
+
+ if (connect(ctx->control_sock, (struct sockaddr *) &server_addr,
+ sizeof(struct sockaddr)) == -1) {
+ perror("Connect");
+ ret = -1;
+ goto end;
+ }
+
+ ret = 0;
+
+end:
+ return ret;
+}
+
+int lttng_live_establish_connection(struct lttng_live_ctx *ctx)
+{
+ struct lttng_viewer_cmd cmd;
+ struct lttng_viewer_connect connect;
+ int ret;
+ ssize_t ret_len;
+
+ cmd.cmd = htobe32(LTTNG_VIEWER_CONNECT);
+ cmd.data_size = sizeof(connect);
+ cmd.cmd_version = 0;
+
+ connect.major = htobe32(LTTNG_LIVE_MAJOR);
+ connect.minor = htobe32(LTTNG_LIVE_MINOR);
+ connect.type = htobe32(LTTNG_VIEWER_CLIENT_COMMAND);
+
+ do {
+ ret_len = send(ctx->control_sock, &cmd, sizeof(cmd), 0);
+ } while (ret_len < 0 && errno == EINTR);
+ if (ret_len < 0) {
+ fprintf(stderr, "[error] Error sending cmd\n");
+ ret = ret_len;
+ goto error;
+ }
+ assert(ret_len == sizeof(cmd));
+
+ do {
+ ret_len = send(ctx->control_sock, &connect, sizeof(connect), 0);
+ } while (ret_len < 0 && errno == EINTR);
+ if (ret_len < 0) {
+ fprintf(stderr, "[error] Error sending version\n");
+ ret = ret_len;
+ goto error;
+ }
+ assert(ret_len == sizeof(connect));
+
+ do {
+ ret_len = recv(ctx->control_sock, &connect, sizeof(connect), 0);
+ } while (ret_len < 0 && errno == EINTR);
+ if (ret_len < 0) {
+ fprintf(stderr, "[error] Error receiving version\n");
+ ret = ret_len;
+ goto error;
+ }
+ assert(ret_len == sizeof(connect));
+
+ printf_verbose("Received viewer session ID : %" PRIu64 "\n",
+ be64toh(connect.viewer_session_id));
+ printf_verbose("Relayd version : %u.%u\n", be32toh(connect.major),
+ be32toh(connect.minor));
+
+ ret = 0;
+
+error:
+ return ret;
+}
+
+int lttng_live_list_sessions(struct lttng_live_ctx *ctx, const char *path)
+{
+ struct lttng_viewer_cmd cmd;
+ struct lttng_viewer_list_sessions list;
+ struct lttng_viewer_session lsession;
+ int i, ret;
+ ssize_t ret_len;
+ int sessions_count;
+
+ cmd.cmd = htobe32(LTTNG_VIEWER_LIST_SESSIONS);
+ cmd.data_size = 0;
+ cmd.cmd_version = 0;
+
+ do {
+ ret_len = send(ctx->control_sock, &cmd, sizeof(cmd), 0);
+ } while (ret_len < 0 && errno == EINTR);
+ if (ret_len < 0) {
+ fprintf(stderr, "[error] Error sending cmd\n");
+ ret = ret_len;
+ goto error;
+ }
+ assert(ret_len == sizeof(cmd));
+
+ do {
+ ret_len = recv(ctx->control_sock, &list, sizeof(list), 0);
+ } while (ret_len < 0 && errno == EINTR);
+ if (ret_len < 0) {
+ fprintf(stderr, "[error] Error receiving session list\n");
+ ret = ret_len;
+ goto error;
+ }
+ assert(ret_len == sizeof(list));
+
+ sessions_count = be32toh(list.sessions_count);
+ fprintf(stdout, "%u active session(s)%c\n", sessions_count,
+ sessions_count > 0 ? ':' : ' ');
+ for (i = 0; i < sessions_count; i++) {
+ do {
+ ret_len = recv(ctx->control_sock, &lsession, sizeof(lsession), 0);
+ } while (ret_len < 0 && errno == EINTR);
+ if (ret_len < 0) {
+ fprintf(stderr, "[error] Error receiving session\n");
+ ret = ret_len;
+ goto error;
+ }
+ assert(ret_len == sizeof(lsession));
+
+ fprintf(stdout, "%s/%" PRIu64 " : %s on host %s (timer = %u, "
+ "%u stream(s), %u client(s) connected)\n",
+ path, be64toh(lsession.id),
+ lsession.session_name, lsession.hostname,
+ be32toh(lsession.live_timer),
+ be32toh(lsession.streams),
+ be32toh(lsession.clients));
+ }
+
+ ret = 0;
+
+error:
+ return ret;
+}
+
+int lttng_live_ctf_trace_assign(struct lttng_live_viewer_stream *stream,
+ uint64_t ctf_trace_id)
+{
+ struct lttng_live_ctf_trace *trace;
+ int ret = 0;
+
+ trace = g_hash_table_lookup(stream->session->ctf_traces,
+ (gpointer) ctf_trace_id);
+ if (!trace) {
+ trace = g_new0(struct lttng_live_ctf_trace, 1);
+ if (!trace) {
+ ret = -1;
+ fprintf(stderr, "[error] ctf_trace allocation\n");
+ goto error;
+ }
+ trace->ctf_trace_id = ctf_trace_id;
+ trace->streams = g_ptr_array_new();
+ g_hash_table_insert(stream->session->ctf_traces,
+ (gpointer) ctf_trace_id,
+ trace);
+ }
+ if (stream->metadata_flag)
+ trace->metadata_stream = stream;
+
+ stream->ctf_trace = trace;
+ g_ptr_array_add(trace->streams, stream);
+
+error:
+ return ret;
+}
+
+int lttng_live_attach_session(struct lttng_live_ctx *ctx, uint64_t id)
+{
+ struct lttng_viewer_cmd cmd;
+ struct lttng_viewer_attach_session_request rq;
+ struct lttng_viewer_attach_session_response rp;
+ struct lttng_viewer_stream stream;
+ int ret, i;
+ ssize_t ret_len;
+
+ cmd.cmd = htobe32(LTTNG_VIEWER_ATTACH_SESSION);
+ cmd.data_size = sizeof(rq);
+ cmd.cmd_version = 0;
+
+ memset(&rq, 0, sizeof(rq));
+ rq.session_id = htobe64(id);
+ // TODO: add cmd line parameter to select seek beginning
+ // rq.seek = htobe32(LTTNG_VIEWER_SEEK_BEGINNING);
+ rq.seek = htobe32(LTTNG_VIEWER_SEEK_LAST);
+
+ do {
+ ret_len = send(ctx->control_sock, &cmd, sizeof(cmd), 0);
+ } while (ret_len < 0 && errno == EINTR);
+ if (ret_len < 0) {
+ fprintf(stderr, "[error] Error sending cmd\n");
+ ret = ret_len;
+ goto error;
+ }
+ assert(ret_len == sizeof(cmd));
+
+ do {
+ ret_len = send(ctx->control_sock, &rq, sizeof(rq), 0);
+ } while (ret_len < 0 && errno == EINTR);
+ if (ret_len < 0) {
+ fprintf(stderr, "[error] Error sending attach request\n");
+ ret = ret_len;
+ goto error;
+ }
+ assert(ret_len == sizeof(rq));
+
+ do {
+ ret_len = recv(ctx->control_sock, &rp, sizeof(rp), 0);
+ } while (ret_len < 0 && errno == EINTR);
+ if (ret_len < 0) {
+ fprintf(stderr, "[error] Error receiving attach response\n");
+ ret = ret_len;
+ goto error;
+ }
+ assert(ret_len == sizeof(rp));
+
+ switch(be32toh(rp.status)) {
+ case LTTNG_VIEWER_ATTACH_OK:
+ break;
+ case LTTNG_VIEWER_ATTACH_UNK:
+ ret = -LTTNG_VIEWER_ATTACH_UNK;
+ goto end;
+ case LTTNG_VIEWER_ATTACH_ALREADY:
+ fprintf(stderr, "[error] Already a viewer attached\n");
+ ret = -1;
+ goto end;
+ case LTTNG_VIEWER_ATTACH_NOT_LIVE:
+ fprintf(stderr, "[error] Not a live session\n");
+ ret = -1;
+ goto end;
+ case LTTNG_VIEWER_ATTACH_SEEK_ERR:
+ fprintf(stderr, "[error] Wrong seek parameter\n");
+ ret = -1;
+ goto end;
+ default:
+ fprintf(stderr, "[error] Unknown attach return code %u\n",
+ be32toh(rp.status));
+ ret = -1;
+ goto end;
+ }
+ if (be32toh(rp.status) != LTTNG_VIEWER_ATTACH_OK) {
+ ret = -1;
+ goto end;
+ }
+
+ ctx->session->stream_count = be32toh(rp.streams_count);
+ /*
+ * When the session is created but not started, we do an active wait
+ * until it starts. It allows the viewer to start processing the trace
+ * as soon as the session starts.
+ */
+ if (ctx->session->stream_count == 0) {
+ ret = 0;
+ goto end;
+ }
+ printf_verbose("Waiting for %" PRIu64 " streams:\n",
+ ctx->session->stream_count);
+ ctx->session->streams = g_new0(struct lttng_live_viewer_stream,
+ ctx->session->stream_count);
+ if (!ctx->session->streams) {
+ ret = -1;
+ goto error;
+ }
+
+ for (i = 0; i < be32toh(rp.streams_count); i++) {
+ do {
+ ret_len = recv(ctx->control_sock, &stream, sizeof(stream), 0);
+ } while (ret_len < 0 && errno == EINTR);
+ if (ret_len < 0) {
+ fprintf(stderr, "[error] Error receiving stream\n");
+ ret = ret_len;
+ goto error;
+ }
+ assert(ret_len == sizeof(stream));
+
+ printf_verbose(" stream %" PRIu64 " : %s/%s\n",
+ be64toh(stream.id), stream.path_name,
+ stream.channel_name);
+ ctx->session->streams[i].id = be64toh(stream.id);
+ ctx->session->streams[i].session = ctx->session;
+
+ ctx->session->streams[i].first_read = 1;
+ ctx->session->streams[i].mmap_size = 0;
+
+ if (be32toh(stream.metadata_flag)) {
+ char *path;
+
+ path = strdup(LTTNG_METADATA_PATH_TEMPLATE);
+ path = mkdtemp(path);
+ ctx->session->streams[i].metadata_flag = 1;
+ mkdir(path, S_IRWXU | S_IRWXG);
+ snprintf(ctx->session->streams[i].path,
+ sizeof(ctx->session->streams[i].path),
+ "%s/%s", path,
+ stream.channel_name);
+ ret = open(ctx->session->streams[i].path,
+ O_WRONLY | O_CREAT | O_TRUNC,
+ S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP);
+ if (ret < 0) {
+ goto error;
+ }
+ ctx->session->streams[i].fd = ret;
+ }
+ ret = lttng_live_ctf_trace_assign(&ctx->session->streams[i],
+ be64toh(stream.ctf_trace_id));
+ if (ret < 0) {
+ goto error;
+ }
+
+ }
+ ret = 0;
+
+end:
+error:
+ return ret;
+}
+
+static
+int get_data_packet(struct lttng_live_ctx *ctx,
+ struct ctf_stream_pos *pos,
+ struct lttng_live_viewer_stream *stream, uint64_t offset,
+ uint64_t len)
+{
+ struct lttng_viewer_cmd cmd;
+ struct lttng_viewer_get_packet rq;
+ struct lttng_viewer_trace_packet rp;
+ ssize_t ret_len;
+ int ret;
+
+ cmd.cmd = htobe32(LTTNG_VIEWER_GET_PACKET);
+ cmd.data_size = sizeof(rq);
+ cmd.cmd_version = 0;
+
+ memset(&rq, 0, sizeof(rq));
+ rq.stream_id = htobe64(stream->id);
+ /* Already in big endian. */
+ rq.offset = offset;
+ rq.len = htobe32(len);
+
+ do {
+ ret_len = send(ctx->control_sock, &cmd, sizeof(cmd), 0);
+ } while (ret_len < 0 && errno == EINTR);
+ if (ret_len < 0) {
+ fprintf(stderr, "[error] Error sending cmd\n");
+ ret = ret_len;
+ goto error;
+ }
+ assert(ret_len == sizeof(cmd));
+
+ do {
+ ret_len = send(ctx->control_sock, &rq, sizeof(rq), 0);
+ } while (ret_len < 0 && errno == EINTR);
+ if (ret_len < 0) {
+ fprintf(stderr, "[error] Error sending get_data_packet request\n");
+ ret = ret_len;
+ goto error;
+ }
+ assert(ret_len == sizeof(rq));
+
+ do {
+ ret_len = recv(ctx->control_sock, &rp, sizeof(rp), 0);
+ } while (ret_len < 0 && errno == EINTR);
+ if (ret_len < 0) {
+ fprintf(stderr, "[error] Error receiving data response\n");
+ ret = ret_len;
+ goto error;
+ }
+ assert(ret_len == sizeof(rp));
+
+ rp.flags = be32toh(rp.flags);
+
+ switch (be32toh(rp.status)) {
+ case LTTNG_VIEWER_GET_PACKET_OK:
+ len = be32toh(rp.len);
+ printf_verbose("get_data_packet: Ok, packet size : %" PRIu64
+ "\n", len);
+ break;
+ case LTTNG_VIEWER_GET_PACKET_RETRY:
+ printf_verbose("get_data_packet: retry\n");
+ ret = -1;
+ goto end;
+ case LTTNG_VIEWER_GET_PACKET_ERR:
+ if (rp.flags & LTTNG_VIEWER_FLAG_NEW_METADATA) {
+ printf_verbose("get_data_packet: new metadata needed\n");
+ ret = 0;
+ goto end;
+ }
+ fprintf(stderr, "[error] get_data_packet: error\n");
+ ret = -1;
+ goto end;
+ case LTTNG_VIEWER_GET_PACKET_EOF:
+ ret = -2;
+ goto error;
+ default:
+ printf_verbose("get_data_packet: unknown\n");
+ assert(0);
+ ret = -1;
+ goto end;
+ }
+
+ if (len <= 0) {
+ ret = -1;
+ goto end;
+ }
+
+ if (len > stream->mmap_size) {
+ uint64_t new_size;
+
+ new_size = max_t(uint64_t, len, stream->mmap_size << 1);
+ if (pos->base_mma) {
+ /* unmap old base */
+ ret = munmap_align(pos->base_mma);
+ if (ret) {
+ fprintf(stderr, "[error] Unable to unmap old base: %s.\n",
+ strerror(errno));
+ ret = -1;
+ goto error;
+ }
+ pos->base_mma = NULL;
+ }
+ pos->base_mma = mmap_align(new_size,
+ PROT_READ | PROT_WRITE,
+ MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
+ if (pos->base_mma == MAP_FAILED) {
+ fprintf(stderr, "[error] mmap error %s.\n",
+ strerror(errno));
+ pos->base_mma = NULL;
+ ret = -1;
+ goto error;
+ }
+
+ stream->mmap_size = new_size;
+ printf_verbose("Expanding stream mmap size to %" PRIu64 " bytes\n",
+ stream->mmap_size);
+ }
+
+ do {
+ ret_len = recv(ctx->control_sock,
+ mmap_align_addr(pos->base_mma), len,
+ MSG_WAITALL);
+ } while (ret_len < 0 && errno == EINTR);
+ if (ret_len < 0) {
+ fprintf(stderr, "[error] Error receiving trace packet\n");
+ ret = ret_len;
+ goto error;
+ }
+ assert(ret_len == len);
+
+end:
+error:
+ return ret;
+}
+
+/*
+ * Return number of metadata bytes written or a negative value on error.
+ */
+static
+int get_new_metadata(struct lttng_live_ctx *ctx,
+ struct lttng_live_viewer_stream *viewer_stream,
+ uint64_t *metadata_len)
+{
+ uint64_t len = 0;
+ int ret;
+ struct lttng_viewer_cmd cmd;
+ struct lttng_viewer_get_metadata rq;
+ struct lttng_viewer_metadata_packet rp;
+ struct lttng_live_viewer_stream *metadata_stream;
+ char *data = NULL;
+ ssize_t ret_len;
+
+ cmd.cmd = htobe32(LTTNG_VIEWER_GET_METADATA);
+ cmd.data_size = sizeof(rq);
+ cmd.cmd_version = 0;
+
+ metadata_stream = viewer_stream->ctf_trace->metadata_stream;
+ rq.stream_id = htobe64(metadata_stream->id);
+
+ do {
+ ret_len = send(ctx->control_sock, &cmd, sizeof(cmd), 0);
+ } while (ret_len < 0 && errno == EINTR);
+ if (ret_len < 0) {
+ fprintf(stderr, "[error] Error sending cmd\n");
+ ret = ret_len;
+ goto error;
+ }
+ assert(ret_len == sizeof(cmd));
+
+ do {
+ ret_len = send(ctx->control_sock, &rq, sizeof(rq), 0);
+ } while (ret_len < 0 && errno == EINTR);
+ if (ret_len < 0) {
+ fprintf(stderr, "[error] Error sending get_metadata request\n");
+ ret = ret_len;
+ goto error;
+ }
+ assert(ret_len == sizeof(rq));
+
+ do {
+ ret_len = recv(ctx->control_sock, &rp, sizeof(rp), 0);
+ } while (ret_len < 0 && errno == EINTR);
+ if (ret_len < 0) {
+ fprintf(stderr, "[error] Error receiving metadata response\n");
+ ret = ret_len;
+ goto error;
+ }
+ assert(ret_len == sizeof(rp));
+
+ switch (be32toh(rp.status)) {
+ case LTTNG_VIEWER_METADATA_OK:
+ printf_verbose("get_metadata : OK\n");
+ break;
+ case LTTNG_VIEWER_NO_NEW_METADATA:
+ printf_verbose("get_metadata : NO NEW\n");
+ ret = -1;
+ goto end;
+ case LTTNG_VIEWER_METADATA_ERR:
+ printf_verbose("get_metadata : ERR\n");
+ ret = -1;
+ goto end;
+ default:
+ printf_verbose("get_metadata : UNKNOWN\n");
+ ret = -1;
+ goto end;
+ }
+
+ len = be64toh(rp.len);
+ printf_verbose("Writing %" PRIu64" bytes to metadata\n", len);
+ if (len <= 0) {
+ ret = -1;
+ goto end;
+ }
+
+ data = zmalloc(len);
+ if (!data) {
+ perror("relay data zmalloc");
+ ret = -1;
+ goto error;
+ }
+ do {
+ ret_len = recv(ctx->control_sock, data, len, MSG_WAITALL);
+ } while (ret_len < 0 && errno == EINTR);
+ if (ret_len < 0) {
+ fprintf(stderr, "[error] Error receiving trace packet\n");
+ ret = ret_len;
+ free(data);
+ goto error;
+ }
+ assert(ret_len == len);
+
+ do {
+ ret_len = write(metadata_stream->fd, data, len);
+ } while (ret_len < 0 && errno == EINTR);
+ if (ret_len < 0) {
+ free(data);
+ ret = ret_len;
+ goto error;
+ }
+ assert(ret_len == len);
+
+ free(data);
+
+ *metadata_len = len;
+ ret = 0;
+end:
+error:
+ return ret;
+}
+
+/*
+ * Get one index for a stream.
+ *
+ * Returns 0 on success or a negative value on error.
+ */
+static
+int get_next_index(struct lttng_live_ctx *ctx,
+ struct lttng_live_viewer_stream *viewer_stream,
+ struct packet_index *index)
+{
+ struct lttng_viewer_cmd cmd;
+ struct lttng_viewer_get_next_index rq;
+ struct lttng_viewer_index rp;
+ int ret;
+ uint64_t metadata_len;
+ ssize_t ret_len;
+
+ cmd.cmd = htobe32(LTTNG_VIEWER_GET_NEXT_INDEX);
+ cmd.data_size = sizeof(rq);
+ cmd.cmd_version = 0;
+
+ memset(&rq, 0, sizeof(rq));
+ rq.stream_id = htobe64(viewer_stream->id);
+
+retry:
+ do {
+ ret_len = send(ctx->control_sock, &cmd, sizeof(cmd), 0);
+ } while (ret_len < 0 && errno == EINTR);
+ if (ret_len < 0) {
+ fprintf(stderr, "[error] Error sending cmd\n");
+ ret = ret_len;
+ goto error;
+ }
+ assert(ret_len == sizeof(cmd));
+
+ do {
+ ret_len = send(ctx->control_sock, &rq, sizeof(rq), 0);
+ } while (ret_len < 0 && errno == EINTR);
+ if (ret_len < 0) {
+ fprintf(stderr, "[error] Error sending get_next_index request\n");
+ ret = ret_len;
+ goto error;
+ }
+ assert(ret_len == sizeof(rq));
+
+ do {
+ ret_len = recv(ctx->control_sock, &rp, sizeof(rp), 0);
+ } while (ret_len < 0 && errno == EINTR);
+ if (ret_len < 0) {
+ fprintf(stderr, "[error] Error receiving index response\n");
+ ret = ret_len;
+ goto error;
+ }
+ assert(ret_len == sizeof(rp));
+
+ rp.flags = be32toh(rp.flags);
+
+ switch (be32toh(rp.status)) {
+ case LTTNG_VIEWER_INDEX_INACTIVE:
+ printf_verbose("get_next_index: inactive\n");
+ memset(index, 0, sizeof(struct packet_index));
+ index->timestamp_end = be64toh(rp.timestamp_end);
+ break;
+ case LTTNG_VIEWER_INDEX_OK:
+ printf_verbose("get_next_index: Ok, need metadata update : %u\n",
+ rp.flags & LTTNG_VIEWER_FLAG_NEW_METADATA);
+ index->offset = be64toh(rp.offset);
+ index->packet_size = be64toh(rp.packet_size);
+ index->content_size = be64toh(rp.content_size);
+ index->timestamp_begin = be64toh(rp.timestamp_begin);
+ index->timestamp_end = be64toh(rp.timestamp_end);
+ index->events_discarded = be64toh(rp.events_discarded);
+
+ if (rp.flags & LTTNG_VIEWER_FLAG_NEW_METADATA) {
+ printf_verbose("get_next_index: new metadata needed\n");
+ ret = get_new_metadata(ctx, viewer_stream,
+ &metadata_len);
+ if (ret < 0) {
+ goto error;
+ }
+ }
+ break;
+ case LTTNG_VIEWER_INDEX_RETRY:
+ printf_verbose("get_next_index: retry\n");
+ sleep(1);
+ goto retry;
+ case LTTNG_VIEWER_INDEX_HUP:
+ printf_verbose("get_next_index: stream hung up\n");
+ viewer_stream->id = -1ULL;
+ viewer_stream->fd = -1;
+ index->offset = EOF;
+ break;
+ case LTTNG_VIEWER_INDEX_ERR:
+ fprintf(stderr, "[error] get_next_index: error\n");
+ ret = -1;
+ goto error;
+ default:
+ fprintf(stderr, "[error] get_next_index: unkwown value\n");
+ ret = -1;
+ goto error;
+ }
+
+ ret = 0;
+
+error:
+ return ret;
+}
+
+void ctf_live_packet_seek(struct bt_stream_pos *stream_pos, size_t index,
+ int whence)
+{
+ struct ctf_stream_pos *pos;
+ struct ctf_file_stream *file_stream;
+ struct packet_index packet_index;
+ struct lttng_live_viewer_stream *viewer_stream;
+ struct lttng_live_session *session;
+ int ret;
+
+retry:
+ pos = ctf_pos(stream_pos);
+ file_stream = container_of(pos, struct ctf_file_stream, pos);
+ viewer_stream = (struct lttng_live_viewer_stream *) pos->priv;
+ session = viewer_stream->session;
+
+ printf_verbose("get_next_index for stream %" PRIu64 "\n", viewer_stream->id);
+ ret = get_next_index(session->ctx, viewer_stream, &packet_index);
+ if (ret < 0) {
+ pos->offset = EOF;
+ fprintf(stderr, "[error] get_next_index failed\n");
+ return;
+ }
+
+ pos->packet_size = packet_index.packet_size;
+ pos->content_size = packet_index.content_size;
+ pos->mmap_base_offset = 0;
+ if (packet_index.offset == EOF) {
+ pos->offset = EOF;
+ } else {
+ pos->offset = 0;
+ }
+
+ if (packet_index.content_size == 0) {
+ file_stream->parent.cycles_timestamp = packet_index.timestamp_end;
+ file_stream->parent.real_timestamp = ctf_get_real_timestamp(
+ &file_stream->parent, packet_index.timestamp_end);
+ } else {
+ file_stream->parent.cycles_timestamp = packet_index.timestamp_begin;
+ file_stream->parent.real_timestamp = ctf_get_real_timestamp(
+ &file_stream->parent, packet_index.timestamp_begin);
+ }
+
+ if (pos->packet_size == 0 || pos->offset == EOF) {
+ goto end;
+ }
+
+ printf_verbose("get_data_packet for stream %" PRIu64 "\n",
+ viewer_stream->id);
+ ret = get_data_packet(session->ctx, pos, viewer_stream,
+ be64toh(packet_index.offset),
+ packet_index.packet_size / CHAR_BIT);
+ if (ret == -2) {
+ goto retry;
+ } else if (ret < 0) {
+ pos->offset = EOF;
+ fprintf(stderr, "[error] get_data_packet failed\n");
+ return;
+ }
+
+ printf_verbose("Index received : packet_size : %" PRIu64
+ ", offset %" PRIu64 ", content_size %" PRIu64
+ ", timestamp_end : %" PRIu64 "\n",
+ packet_index.packet_size, packet_index.offset,
+ packet_index.content_size, packet_index.timestamp_end);
+
+ /* update trace_packet_header and stream_packet_context */
+ if (pos->prot != PROT_WRITE && file_stream->parent.trace_packet_header) {
+ /* Read packet header */
+ ret = generic_rw(&pos->parent, &file_stream->parent.trace_packet_header->p);
+ if (ret) {
+ pos->offset = EOF;
+ fprintf(stderr, "[error] trace packet header read failed\n");
+ goto end;
+ }
+ }
+ if (pos->prot != PROT_WRITE && file_stream->parent.stream_packet_context) {
+ /* Read packet context */
+ ret = generic_rw(&pos->parent, &file_stream->parent.stream_packet_context->p);
+ if (ret) {
+ pos->offset = EOF;
+ fprintf(stderr, "[error] stream packet context read failed\n");
+ goto end;
+ }
+ }
+ pos->data_offset = pos->offset;
+
+end:
+ return;
+}
+
+static int del_traces(gpointer key, gpointer value, gpointer user_data)
+{
+ struct bt_context *bt_ctx = user_data;
+ struct lttng_live_ctf_trace *trace = value;
+ int ret;
+
+ ret = bt_context_remove_trace(bt_ctx, trace->trace_id);
+ if (ret < 0)
+ fprintf(stderr, "[error] removing trace from context\n");
+
+ /* remove the key/value pair from the HT. */
+ return 1;
+}
+
+static void add_traces(gpointer key, gpointer value, gpointer user_data)
+{
+ int i, ret, total_metadata = 0;
+ uint64_t metadata_len;
+ struct bt_context *bt_ctx = user_data;
+ struct lttng_live_ctf_trace *trace = value;
+ struct lttng_live_viewer_stream *stream;
+ struct bt_mmap_stream *new_mmap_stream;
+ struct bt_mmap_stream_list mmap_list;
+ struct lttng_live_ctx *ctx = NULL;
+
+ BT_INIT_LIST_HEAD(&mmap_list.head);
+
+ for (i = 0; i < trace->streams->len; i++) {
+ stream = g_ptr_array_index(trace->streams, i);
+ ctx = stream->session->ctx;
+
+ if (!stream->metadata_flag) {
+ new_mmap_stream = zmalloc(sizeof(struct bt_mmap_stream));
+ new_mmap_stream->priv = (void *) stream;
+ new_mmap_stream->fd = -1;
+ bt_list_add(&new_mmap_stream->list, &mmap_list.head);
+ } else {
+ /* Get all possible metadata before starting */
+ do {
+ ret = get_new_metadata(ctx, stream,
+ &metadata_len);
+ if (ret == 0) {
+ total_metadata += metadata_len;
+ }
+ } while (ret == 0 || total_metadata == 0);
+ trace->metadata_fp = fopen(stream->path, "r");
+ }
+ }
+
+ if (!trace->metadata_fp) {
+ fprintf(stderr, "[error] No metadata stream opened\n");
+ goto end_free;
+ }
+
+ ret = bt_context_add_trace(bt_ctx, NULL, "ctf",
+ ctf_live_packet_seek, &mmap_list, trace->metadata_fp);
+ if (ret < 0) {
+ fprintf(stderr, "[error] Error adding trace\n");
+ goto end_free;
+ }
+ trace->trace_id = ret;
+
+ goto end;
+
+end_free:
+ bt_context_put(bt_ctx);
+end:
+ return;
+}
+
+void lttng_live_read(struct lttng_live_ctx *ctx, uint64_t session_id)
+{
+ int ret, active_session = 0;
+ struct bt_context *bt_ctx;
+ struct bt_ctf_iter *iter;
+ const struct bt_ctf_event *event;
+ struct bt_iter_pos begin_pos;
+ struct bt_trace_descriptor *td_write;
+ struct bt_format *fmt_write;
+ struct ctf_text_stream_pos *sout;
+
+ bt_ctx = bt_context_create();
+ if (!bt_ctx) {
+ fprintf(stderr, "[error] bt_context_create allocation\n");
+ goto end;
+ }
+
+ fmt_write = bt_lookup_format(g_quark_from_static_string("text"));
+ if (!fmt_write) {
+ fprintf(stderr, "[error] ctf-text error\n");
+ goto end;
+ }
+
+ td_write = fmt_write->open_trace(NULL, O_RDWR, NULL, NULL);
+ if (!td_write) {
+ fprintf(stderr, "[error] Error opening output trace\n");
+ goto end_free;
+ }
+
+ sout = container_of(td_write, struct ctf_text_stream_pos,
+ trace_descriptor);
+ if (!sout->parent.event_cb)
+ goto end_free;
+
+ /*
+ * As long as the session is active, we try to reattach to it,
+ * even if all the streams get closed.
+ */
+ do {
+ int flags;
+
+ do {
+ ret = lttng_live_attach_session(ctx, session_id);
+ printf_verbose("Attaching session returns %d\n", ret);
+ if (ret < 0) {
+ if (ret == -LTTNG_VIEWER_ATTACH_UNK) {
+ if (active_session)
+ goto end_free;
+ fprintf(stderr, "[error] Unknown "
+ "session ID\n");
+ }
+ goto end_free;
+ } else {
+ active_session = 1;
+ }
+ } while (ctx->session->stream_count == 0);
+
+ g_hash_table_foreach(ctx->session->ctf_traces, add_traces, bt_ctx);
+
+ begin_pos.type = BT_SEEK_BEGIN;
+ iter = bt_ctf_iter_create(bt_ctx, &begin_pos, NULL);
+ if (!iter) {
+ fprintf(stderr, "[error] Iterator creation error\n");
+ goto end;
+ }
+ for (;;) {
+ event = bt_ctf_iter_read_event_flags(iter, &flags);
+ if (!(flags & BT_ITER_FLAG_RETRY)) {
+ if (!event) {
+ /* End of trace */
+ break;
+ }
+ ret = sout->parent.event_cb(&sout->parent,
+ event->parent->stream);
+ if (ret) {
+ fprintf(stderr, "[error] Writing "
+ "event failed.\n");
+ goto end_free;
+ }
+ }
+ ret = bt_iter_next(bt_ctf_get_iter(iter));
+ if (ret < 0) {
+ goto end_free;
+ }
+ }
+ bt_ctf_iter_destroy(iter);
+ g_hash_table_foreach_remove(ctx->session->ctf_traces, del_traces, bt_ctx);
+ } while (active_session);
+
+end_free:
+ bt_context_put(bt_ctx);
+end:
+ return;
+}
--- /dev/null
+/*
+ * BabelTrace - LTTng live Output
+ *
+ * Copyright 2013 Julien Desfossez <jdesfossez@efficios.com>
+ * Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ *
+ * 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.
+ */
+
+#include <babeltrace/ctf-text/types.h>
+#include <babeltrace/format.h>
+#include <babeltrace/babeltrace-internal.h>
+#include <inttypes.h>
+#include <sys/mman.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <dirent.h>
+#include <glib.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include "lttng-live-functions.h"
+
+static int parse_url(const char *path, char *hostname, int *port,
+ uint64_t *session_id)
+{
+ char remain[NAME_MAX];
+ int ret, proto, proto_offset = 0;
+
+ ret = sscanf(path, "net%d%s", &proto, remain);
+ if (ret < 2) {
+ proto = 4;
+ /* net:// */
+ proto_offset = strlen("net://");
+ } else {
+ /* net4:// or net6:// */
+ proto_offset = strlen("netX://");
+ }
+ /* TODO : parse for IPv6 as well */
+ /* Parse the hostname or IP */
+ ret = sscanf(path + proto_offset, "%[a-zA-Z.1-9%-]%s",
+ hostname, remain);
+ if (ret == 2) {
+ /* Optional port number */
+ if (remain[0] == ':') {
+ ret = sscanf(remain, ":%d%s", port, remain);
+ /* Optional session ID with port number */
+ if (ret == 2) {
+ ret = sscanf(remain, "/%" PRIu64, session_id);
+ }
+ /* Optional session ID */
+ } else if (remain[0] == '/') {
+ ret = sscanf(remain, "/%" PRIu64, session_id);
+ } else {
+ fprintf(stderr, "[error] wrong delimitor : %c\n",
+ remain[0]);
+ ret = -1;
+ goto end;
+ }
+ }
+
+ if (*port < 0)
+ *port = LTTNG_DEFAULT_NETWORK_VIEWER_PORT;
+
+ if (*session_id == -1ULL)
+ printf_verbose("Connecting to hostname : %s, port : %d, "
+ "proto : IPv%d\n",
+ hostname, *port, proto);
+ else
+ printf_verbose("Connecting to hostname : %s, port : %d, "
+ "session id : %" PRIu64 ", proto : IPv%d\n",
+ hostname, *port, *session_id, proto);
+ ret = 0;
+
+end:
+ return ret;
+}
+
+static int lttng_live_open_trace_read(const char *path)
+{
+ char hostname[NAME_MAX];
+ int port = -1;
+ uint64_t session_id = -1ULL;
+ int ret = 0;
+ struct lttng_live_ctx ctx;
+
+ /* set default */
+ opt_context_field_names = 1;
+ opt_payload_field_names = 1;
+
+ ctx.session = g_new0(struct lttng_live_session, 1);
+ if (!ctx.session) {
+ ret = -1;
+ goto end;
+ }
+ /* We need a pointer to the context from the packet_seek function. */
+ ctx.session->ctx = &ctx;
+
+ /* HT to store the CTF traces. */
+ ctx.session->ctf_traces = g_hash_table_new(g_direct_hash,
+ g_direct_equal);
+
+ ret = parse_url(path, hostname, &port, &session_id);
+ if (ret < 0) {
+ goto end_free;
+ }
+
+ ret = lttng_live_connect_viewer(&ctx, hostname, port);
+ if (ret < 0) {
+ fprintf(stderr, "[error] Connection failed\n");
+ goto end_free;
+ }
+ printf_verbose("LTTng-live connected to relayd\n");
+
+ ret = lttng_live_establish_connection(&ctx);
+ if (ret < 0) {
+ goto end_free;
+ }
+
+ if (session_id == -1ULL) {
+ printf_verbose("Listing sessions\n");
+ ret = lttng_live_list_sessions(&ctx, path);
+ if (ret < 0) {
+ fprintf(stderr, "[error] List error\n");
+ goto end_free;
+ }
+ } else {
+ lttng_live_read(&ctx, session_id);
+ }
+
+end_free:
+ g_hash_table_destroy(ctx.session->ctf_traces);
+ g_free(ctx.session);
+end:
+ g_free(ctx.session->streams);
+ return ret;
+}
+
+static
+struct bt_trace_descriptor *lttng_live_open_trace(const char *path, int flags,
+ void (*packet_seek)(struct bt_stream_pos *pos, size_t index,
+ int whence), FILE *metadata_fp)
+{
+ struct ctf_text_stream_pos *pos;
+
+ switch (flags & O_ACCMODE) {
+ case O_RDONLY:
+ /* OK */
+ break;
+ case O_RDWR:
+ fprintf(stderr, "[error] lttng live plugin cannot be used as output plugin.\n");
+ goto error;
+ default:
+ fprintf(stderr, "[error] Incorrect open flags.\n");
+ goto error;
+ }
+
+ pos = g_new0(struct ctf_text_stream_pos, 1);
+ pos->parent.rw_table = NULL;
+ pos->parent.event_cb = NULL;
+ pos->parent.trace = &pos->trace_descriptor;
+ lttng_live_open_trace_read(path);
+ return &pos->trace_descriptor;
+
+error:
+ return NULL;
+}
+
+static
+int lttng_live_close_trace(struct bt_trace_descriptor *td)
+{
+ struct ctf_text_stream_pos *pos =
+ container_of(td, struct ctf_text_stream_pos,
+ trace_descriptor);
+ free(pos);
+ return 0;
+}
+
+static
+struct bt_format lttng_live_format = {
+ .open_trace = lttng_live_open_trace,
+ .close_trace = lttng_live_close_trace,
+};
+
+static
+void __attribute__((constructor)) lttng_live_init(void)
+{
+ int ret;
+
+ lttng_live_format.name = g_quark_from_static_string("lttng-live");
+ ret = bt_register_format(<tng_live_format);
+ assert(!ret);
+}
+
+static
+void __attribute__((destructor)) lttng_live_exit(void)
+{
+ bt_unregister_format(<tng_live_format);
+}
--- /dev/null
+#ifndef LTTNG_VIEWER_H
+#define LTTNG_VIEWER_H
+
+/*
+ * Copyright (C) 2013 - Julien Desfossez <jdesfossez@efficios.com>
+ * Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ * David Goulet <dgoulet@efficios.com>
+ *
+ * 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.
+ */
+
+#include <limits.h>
+
+#define LTTNG_VIEWER_PATH_MAX 4096
+#define LTTNG_VIEWER_NAME_MAX 255
+#define LTTNG_VIEWER_HOST_NAME_MAX 64
+
+/* Flags in reply to get_next_index and get_packet. */
+enum {
+ /* New metadata is required to read this packet. */
+ LTTNG_VIEWER_FLAG_NEW_METADATA = (1 << 0),
+ /* New stream got added to the trace. */
+ LTTNG_VIEWER_FLAG_NEW_STREAM = (1 << 1),
+};
+
+enum lttng_viewer_command {
+ LTTNG_VIEWER_CONNECT = 1,
+ LTTNG_VIEWER_LIST_SESSIONS = 2,
+ LTTNG_VIEWER_ATTACH_SESSION = 3,
+ LTTNG_VIEWER_GET_NEXT_INDEX = 4,
+ LTTNG_VIEWER_GET_PACKET = 5,
+ LTTNG_VIEWER_GET_METADATA = 6,
+};
+
+enum lttng_viewer_attach_return_code {
+ LTTNG_VIEWER_ATTACH_OK = 1, /* The attach command succeeded. */
+ LTTNG_VIEWER_ATTACH_ALREADY = 2, /* A viewer is already attached. */
+ LTTNG_VIEWER_ATTACH_UNK = 3, /* The session ID is unknown. */
+ LTTNG_VIEWER_ATTACH_NOT_LIVE = 4, /* The session is not live. */
+ LTTNG_VIEWER_ATTACH_SEEK_ERR = 5, /* Seek error. */
+};
+
+enum lttng_viewer_next_index_return_code {
+ LTTNG_VIEWER_INDEX_OK = 1, /* Index is available. */
+ LTTNG_VIEWER_INDEX_RETRY = 2, /* Index not yet available. */
+ LTTNG_VIEWER_INDEX_HUP = 3, /* Index closed (trace destroyed). */
+ LTTNG_VIEWER_INDEX_ERR = 4, /* Unknow error. */
+ LTTNG_VIEWER_INDEX_INACTIVE = 5, /* Inactive stream beacon. */
+ LTTNG_VIEWER_INDEX_EOF = 6, /* End of index file. */
+};
+
+enum lttng_viewer_get_packet_return_code {
+ LTTNG_VIEWER_GET_PACKET_OK = 1,
+ LTTNG_VIEWER_GET_PACKET_RETRY = 2,
+ LTTNG_VIEWER_GET_PACKET_ERR = 3,
+ LTTNG_VIEWER_GET_PACKET_EOF = 4,
+};
+
+enum lttng_viewer_get_metadata_return_code {
+ LTTNG_VIEWER_METADATA_OK = 1,
+ LTTNG_VIEWER_NO_NEW_METADATA = 2,
+ LTTNG_VIEWER_METADATA_ERR = 3,
+};
+
+enum lttng_viewer_connection_type {
+ LTTNG_VIEWER_CLIENT_COMMAND = 1,
+ LTTNG_VIEWER_CLIENT_NOTIFICATION = 2,
+};
+
+enum lttng_viewer_seek {
+ /* Receive the trace packets from the beginning. */
+ LTTNG_VIEWER_SEEK_BEGINNING = 1,
+ /* Receive the trace packets from now. */
+ LTTNG_VIEWER_SEEK_LAST = 2,
+};
+
+struct lttng_viewer_session {
+ uint64_t id;
+ uint32_t live_timer;
+ uint32_t clients;
+ uint32_t streams;
+ char hostname[LTTNG_VIEWER_HOST_NAME_MAX];
+ char session_name[LTTNG_VIEWER_NAME_MAX];
+} __attribute__((__packed__));
+
+struct lttng_viewer_stream {
+ uint64_t id;
+ uint64_t ctf_trace_id;
+ int metadata_flag;
+ char path_name[LTTNG_VIEWER_PATH_MAX];
+ char channel_name[LTTNG_VIEWER_NAME_MAX];
+} __attribute__((__packed__));
+
+struct lttng_viewer_cmd {
+ uint64_t data_size; /* data size following this header */
+ uint32_t cmd; /* enum lttcomm_relayd_command */
+ uint32_t cmd_version; /* command version */
+} __attribute__((__packed__));
+
+/*
+ * LTTNG_VIEWER_CONNECT payload.
+ */
+struct lttng_viewer_connect {
+ /* session ID assigned by the relay for command connections */
+ uint64_t viewer_session_id;
+ uint32_t major;
+ uint32_t minor;
+ uint32_t type; /* enum lttng_viewer_connection_type */
+} __attribute__((__packed__));
+
+/*
+ * LTTNG_VIEWER_LIST_SESSIONS payload.
+ */
+struct lttng_viewer_list_sessions {
+ uint32_t sessions_count;
+ char session_list[]; /* struct lttng_viewer_session */
+} __attribute__((__packed__));
+
+/*
+ * LTTNG_VIEWER_ATTACH_SESSION payload.
+ */
+struct lttng_viewer_attach_session_request {
+ uint64_t session_id;
+ uint64_t offset; /* unused for now */
+ uint32_t seek; /* enum lttng_viewer_seek */
+} __attribute__((__packed__));
+
+struct lttng_viewer_attach_session_response {
+ /* enum lttng_viewer_attach_return_code */
+ uint32_t status;
+ uint32_t streams_count;
+ /* struct lttng_viewer_stream */
+ char stream_list[];
+} __attribute__((__packed__));
+
+/*
+ * LTTNG_VIEWER_GET_NEXT_INDEX payload.
+ */
+struct lttng_viewer_get_next_index {
+ uint64_t stream_id;
+} __attribute__ ((__packed__));
+
+struct lttng_viewer_index {
+ uint64_t offset;
+ uint64_t packet_size;
+ uint64_t content_size;
+ uint64_t timestamp_begin;
+ uint64_t timestamp_end;
+ uint64_t events_discarded;
+ uint64_t stream_id;
+ uint32_t status; /* enum lttng_viewer_next_index_return_code */
+ uint32_t flags; /* LTTNG_VIEWER_FLAG_* */
+} __attribute__ ((__packed__));
+
+/*
+ * LTTNG_VIEWER_GET_PACKET payload.
+ */
+struct lttng_viewer_get_packet {
+ uint64_t stream_id;
+ uint64_t offset;
+ uint32_t len;
+} __attribute__((__packed__));
+
+struct lttng_viewer_trace_packet {
+ uint32_t status; /* enum lttng_viewer_get_packet_return_code */
+ uint32_t len;
+ uint32_t flags; /* LTTNG_VIEWER_FLAG_* */
+ char data[];
+} __attribute__((__packed__));
+
+/*
+ * LTTNG_VIEWER_GET_METADATA payload.
+ */
+struct lttng_viewer_get_metadata {
+ uint64_t stream_id;
+} __attribute__((__packed__));
+
+struct lttng_viewer_metadata_packet {
+ uint64_t len;
+ uint32_t status; /* enum lttng_viewer_get_metadata_return_code */
+ char data[];
+} __attribute__((__packed__));
+
+#endif /* LTTNG_VIEWER_H */
projects / babeltrace.git / commitdiff
