| 1 | /* |
| 2 | * lttng-live.c |
| 3 | * |
| 4 | * Babeltrace CTF LTTng-live Client Component |
| 5 | * |
| 6 | * Copyright 2016 Jérémie Galarneau <jeremie.galarneau@efficios.com> |
| 7 | * Copyright 2016 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
| 8 | * |
| 9 | * Author: Jérémie Galarneau <jeremie.galarneau@efficios.com> |
| 10 | * |
| 11 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
| 12 | * of this software and associated documentation files (the "Software"), to deal |
| 13 | * in the Software without restriction, including without limitation the rights |
| 14 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| 15 | * copies of the Software, and to permit persons to whom the Software is |
| 16 | * furnished to do so, subject to the following conditions: |
| 17 | * |
| 18 | * The above copyright notice and this permission notice shall be included in |
| 19 | * all copies or substantial portions of the Software. |
| 20 | * |
| 21 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 22 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 23 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| 24 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 25 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 26 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 27 | * SOFTWARE. |
| 28 | */ |
| 29 | |
| 30 | #define BT_LOG_TAG "PLUGIN-CTF-LTTNG-LIVE-SRC" |
| 31 | #include "logging.h" |
| 32 | |
| 33 | #include <babeltrace/ctf-ir/packet.h> |
| 34 | #include <babeltrace/graph/component-source.h> |
| 35 | #include <babeltrace/graph/private-port.h> |
| 36 | #include <babeltrace/graph/port.h> |
| 37 | #include <babeltrace/graph/private-component.h> |
| 38 | #include <babeltrace/graph/private-component-source.h> |
| 39 | #include <babeltrace/graph/private-connection-private-notification-iterator.h> |
| 40 | #include <babeltrace/graph/notification-stream.h> |
| 41 | #include <babeltrace/graph/notification-packet.h> |
| 42 | #include <babeltrace/graph/notification-event.h> |
| 43 | #include <babeltrace/graph/notification-heap.h> |
| 44 | #include <babeltrace/graph/notification-iterator.h> |
| 45 | #include <babeltrace/graph/notification-inactivity.h> |
| 46 | #include <babeltrace/graph/graph.h> |
| 47 | #include <babeltrace/compiler-internal.h> |
| 48 | #include <babeltrace/types.h> |
| 49 | #include <inttypes.h> |
| 50 | #include <glib.h> |
| 51 | #include <assert.h> |
| 52 | #include <unistd.h> |
| 53 | #include <plugins-common.h> |
| 54 | |
| 55 | #include "data-stream.h" |
| 56 | #include "metadata.h" |
| 57 | #include "lttng-live-internal.h" |
| 58 | |
| 59 | #define MAX_QUERY_SIZE (256*1024) |
| 60 | |
| 61 | #define print_dbg(fmt, ...) BT_LOGD(fmt, ## __VA_ARGS__) |
| 62 | |
| 63 | static const char *print_state(struct lttng_live_stream_iterator *s) |
| 64 | { |
| 65 | switch (s->state) { |
| 66 | case LTTNG_LIVE_STREAM_ACTIVE_NO_DATA: |
| 67 | return "ACTIVE_NO_DATA"; |
| 68 | case LTTNG_LIVE_STREAM_QUIESCENT_NO_DATA: |
| 69 | return "QUIESCENT_NO_DATA"; |
| 70 | case LTTNG_LIVE_STREAM_QUIESCENT: |
| 71 | return "QUIESCENT"; |
| 72 | case LTTNG_LIVE_STREAM_ACTIVE_DATA: |
| 73 | return "ACTIVE_DATA"; |
| 74 | case LTTNG_LIVE_STREAM_EOF: |
| 75 | return "EOF"; |
| 76 | default: |
| 77 | return "ERROR"; |
| 78 | } |
| 79 | } |
| 80 | |
| 81 | static |
| 82 | void print_stream_state(struct lttng_live_stream_iterator *stream) |
| 83 | { |
| 84 | struct bt_port *port; |
| 85 | |
| 86 | port = bt_port_from_private_port(stream->port); |
| 87 | print_dbg("stream %s state %s last_inact_ts %" PRId64 " cur_inact_ts %" PRId64, |
| 88 | bt_port_get_name(port), |
| 89 | print_state(stream), |
| 90 | stream->last_returned_inactivity_timestamp, |
| 91 | stream->current_inactivity_timestamp); |
| 92 | bt_put(port); |
| 93 | } |
| 94 | |
| 95 | BT_HIDDEN |
| 96 | bt_bool lttng_live_is_canceled(struct lttng_live_component *lttng_live) |
| 97 | { |
| 98 | struct bt_component *component; |
| 99 | struct bt_graph *graph; |
| 100 | bt_bool ret; |
| 101 | |
| 102 | if (!lttng_live) { |
| 103 | return BT_FALSE; |
| 104 | } |
| 105 | |
| 106 | component = bt_component_from_private_component(lttng_live->private_component); |
| 107 | graph = bt_component_get_graph(component); |
| 108 | ret = bt_graph_is_canceled(graph); |
| 109 | bt_put(graph); |
| 110 | bt_put(component); |
| 111 | return ret; |
| 112 | } |
| 113 | |
| 114 | BT_HIDDEN |
| 115 | int lttng_live_add_port(struct lttng_live_component *lttng_live, |
| 116 | struct lttng_live_stream_iterator *stream_iter) |
| 117 | { |
| 118 | int ret; |
| 119 | struct bt_private_port *private_port; |
| 120 | char name[STREAM_NAME_MAX_LEN]; |
| 121 | enum bt_component_status status; |
| 122 | |
| 123 | ret = sprintf(name, STREAM_NAME_PREFIX "%" PRIu64, stream_iter->viewer_stream_id); |
| 124 | assert(ret > 0); |
| 125 | strcpy(stream_iter->name, name); |
| 126 | if (lttng_live_is_canceled(lttng_live)) { |
| 127 | return 0; |
| 128 | } |
| 129 | status = bt_private_component_source_add_output_private_port( |
| 130 | lttng_live->private_component, name, stream_iter, |
| 131 | &private_port); |
| 132 | switch (status) { |
| 133 | case BT_COMPONENT_STATUS_GRAPH_IS_CANCELED: |
| 134 | return 0; |
| 135 | case BT_COMPONENT_STATUS_OK: |
| 136 | break; |
| 137 | default: |
| 138 | return -1; |
| 139 | } |
| 140 | bt_put(private_port); /* weak */ |
| 141 | BT_LOGI("Added port %s", name); |
| 142 | |
| 143 | if (lttng_live->no_stream_port) { |
| 144 | bt_get(lttng_live->no_stream_port); |
| 145 | ret = bt_private_port_remove_from_component(lttng_live->no_stream_port); |
| 146 | bt_put(lttng_live->no_stream_port); |
| 147 | if (ret) { |
| 148 | return -1; |
| 149 | } |
| 150 | lttng_live->no_stream_port = NULL; |
| 151 | lttng_live->no_stream_iter->port = NULL; |
| 152 | } |
| 153 | stream_iter->port = private_port; |
| 154 | return 0; |
| 155 | } |
| 156 | |
| 157 | BT_HIDDEN |
| 158 | int lttng_live_remove_port(struct lttng_live_component *lttng_live, |
| 159 | struct bt_private_port *port) |
| 160 | { |
| 161 | struct bt_component *component; |
| 162 | int64_t nr_ports; |
| 163 | int ret; |
| 164 | |
| 165 | component = bt_component_from_private_component(lttng_live->private_component); |
| 166 | nr_ports = bt_component_source_get_output_port_count(component); |
| 167 | if (nr_ports < 0) { |
| 168 | return -1; |
| 169 | } |
| 170 | BT_PUT(component); |
| 171 | if (nr_ports == 1) { |
| 172 | enum bt_component_status status; |
| 173 | |
| 174 | assert(!lttng_live->no_stream_port); |
| 175 | |
| 176 | if (lttng_live_is_canceled(lttng_live)) { |
| 177 | return 0; |
| 178 | } |
| 179 | status = bt_private_component_source_add_output_private_port(lttng_live->private_component, |
| 180 | "no-stream", lttng_live->no_stream_iter, |
| 181 | <tng_live->no_stream_port); |
| 182 | switch (status) { |
| 183 | case BT_COMPONENT_STATUS_GRAPH_IS_CANCELED: |
| 184 | return 0; |
| 185 | case BT_COMPONENT_STATUS_OK: |
| 186 | break; |
| 187 | default: |
| 188 | return -1; |
| 189 | } |
| 190 | bt_put(lttng_live->no_stream_port); /* weak */ |
| 191 | lttng_live->no_stream_iter->port = lttng_live->no_stream_port; |
| 192 | } |
| 193 | bt_get(port); |
| 194 | ret = bt_private_port_remove_from_component(port); |
| 195 | bt_put(port); |
| 196 | if (ret) { |
| 197 | return -1; |
| 198 | } |
| 199 | return 0; |
| 200 | } |
| 201 | |
| 202 | static |
| 203 | struct lttng_live_trace *lttng_live_find_trace(struct lttng_live_session *session, |
| 204 | uint64_t trace_id) |
| 205 | { |
| 206 | struct lttng_live_trace *trace; |
| 207 | |
| 208 | bt_list_for_each_entry(trace, &session->traces, node) { |
| 209 | if (trace->id == trace_id) { |
| 210 | return trace; |
| 211 | } |
| 212 | } |
| 213 | return NULL; |
| 214 | } |
| 215 | |
| 216 | static |
| 217 | void lttng_live_destroy_trace(struct bt_object *obj) |
| 218 | { |
| 219 | struct lttng_live_trace *trace = container_of(obj, struct lttng_live_trace, obj); |
| 220 | |
| 221 | BT_LOGI("Destroy trace"); |
| 222 | assert(bt_list_empty(&trace->streams)); |
| 223 | bt_list_del(&trace->node); |
| 224 | |
| 225 | if (trace->trace) { |
| 226 | int retval; |
| 227 | |
| 228 | retval = bt_ctf_trace_set_is_static(trace->trace); |
| 229 | assert(!retval); |
| 230 | BT_PUT(trace->trace); |
| 231 | } |
| 232 | lttng_live_metadata_fini(trace); |
| 233 | BT_PUT(trace->cc_prio_map); |
| 234 | g_free(trace); |
| 235 | } |
| 236 | |
| 237 | static |
| 238 | struct lttng_live_trace *lttng_live_create_trace(struct lttng_live_session *session, |
| 239 | uint64_t trace_id) |
| 240 | { |
| 241 | struct lttng_live_trace *trace = NULL; |
| 242 | |
| 243 | trace = g_new0(struct lttng_live_trace, 1); |
| 244 | if (!trace) { |
| 245 | goto error; |
| 246 | } |
| 247 | trace->session = session; |
| 248 | trace->id = trace_id; |
| 249 | BT_INIT_LIST_HEAD(&trace->streams); |
| 250 | trace->new_metadata_needed = true; |
| 251 | bt_list_add(&trace->node, &session->traces); |
| 252 | bt_object_init(&trace->obj, lttng_live_destroy_trace); |
| 253 | BT_LOGI("Create trace"); |
| 254 | goto end; |
| 255 | error: |
| 256 | g_free(trace); |
| 257 | trace = NULL; |
| 258 | end: |
| 259 | return trace; |
| 260 | } |
| 261 | |
| 262 | BT_HIDDEN |
| 263 | struct lttng_live_trace *lttng_live_ref_trace(struct lttng_live_session *session, |
| 264 | uint64_t trace_id) |
| 265 | { |
| 266 | struct lttng_live_trace *trace; |
| 267 | |
| 268 | trace = lttng_live_find_trace(session, trace_id); |
| 269 | if (trace) { |
| 270 | bt_get(trace); |
| 271 | return trace; |
| 272 | } |
| 273 | return lttng_live_create_trace(session, trace_id); |
| 274 | } |
| 275 | |
| 276 | BT_HIDDEN |
| 277 | void lttng_live_unref_trace(struct lttng_live_trace *trace) |
| 278 | { |
| 279 | bt_put(trace); |
| 280 | } |
| 281 | |
| 282 | static |
| 283 | void lttng_live_close_trace_streams(struct lttng_live_trace *trace) |
| 284 | { |
| 285 | struct lttng_live_stream_iterator *stream, *s; |
| 286 | |
| 287 | bt_list_for_each_entry_safe(stream, s, &trace->streams, node) { |
| 288 | lttng_live_stream_iterator_destroy(stream); |
| 289 | } |
| 290 | lttng_live_metadata_fini(trace); |
| 291 | } |
| 292 | |
| 293 | BT_HIDDEN |
| 294 | int lttng_live_add_session(struct lttng_live_component *lttng_live, |
| 295 | uint64_t session_id, const char *hostname, |
| 296 | const char *session_name) |
| 297 | { |
| 298 | int ret = 0; |
| 299 | struct lttng_live_session *s; |
| 300 | |
| 301 | s = g_new0(struct lttng_live_session, 1); |
| 302 | if (!s) { |
| 303 | goto error; |
| 304 | } |
| 305 | |
| 306 | s->id = session_id; |
| 307 | BT_INIT_LIST_HEAD(&s->traces); |
| 308 | s->lttng_live = lttng_live; |
| 309 | s->new_streams_needed = true; |
| 310 | s->hostname = g_string_new(hostname); |
| 311 | s->session_name = g_string_new(session_name); |
| 312 | |
| 313 | BT_LOGI("Reading from session: %" PRIu64 " hostname: %s session_name: %s", |
| 314 | s->id, hostname, session_name); |
| 315 | bt_list_add(&s->node, <tng_live->sessions); |
| 316 | goto end; |
| 317 | error: |
| 318 | BT_LOGE("Error adding session"); |
| 319 | g_free(s); |
| 320 | ret = -1; |
| 321 | end: |
| 322 | return ret; |
| 323 | } |
| 324 | |
| 325 | static |
| 326 | void lttng_live_destroy_session(struct lttng_live_session *session) |
| 327 | { |
| 328 | struct lttng_live_trace *trace, *t; |
| 329 | |
| 330 | BT_LOGI("Destroy session"); |
| 331 | if (session->id != -1ULL) { |
| 332 | if (lttng_live_detach_session(session)) { |
| 333 | if (!lttng_live_is_canceled(session->lttng_live)) { |
| 334 | /* Old relayd cannot detach sessions. */ |
| 335 | BT_LOGD("Unable to detach session %" PRIu64, |
| 336 | session->id); |
| 337 | } |
| 338 | } |
| 339 | session->id = -1ULL; |
| 340 | } |
| 341 | bt_list_for_each_entry_safe(trace, t, &session->traces, node) { |
| 342 | lttng_live_close_trace_streams(trace); |
| 343 | } |
| 344 | bt_list_del(&session->node); |
| 345 | if (session->hostname) { |
| 346 | g_string_free(session->hostname, TRUE); |
| 347 | } |
| 348 | if (session->session_name) { |
| 349 | g_string_free(session->session_name, TRUE); |
| 350 | } |
| 351 | g_free(session); |
| 352 | } |
| 353 | |
| 354 | BT_HIDDEN |
| 355 | void lttng_live_iterator_finalize(struct bt_private_connection_private_notification_iterator *it) |
| 356 | { |
| 357 | struct lttng_live_stream_iterator_generic *s = |
| 358 | bt_private_connection_private_notification_iterator_get_user_data(it); |
| 359 | |
| 360 | switch (s->type) { |
| 361 | case LIVE_STREAM_TYPE_NO_STREAM: |
| 362 | { |
| 363 | /* Leave no_stream_iter in place when port is removed. */ |
| 364 | break; |
| 365 | } |
| 366 | case LIVE_STREAM_TYPE_STREAM: |
| 367 | { |
| 368 | struct lttng_live_stream_iterator *stream_iter = |
| 369 | container_of(s, struct lttng_live_stream_iterator, p); |
| 370 | |
| 371 | lttng_live_stream_iterator_destroy(stream_iter); |
| 372 | break; |
| 373 | } |
| 374 | } |
| 375 | } |
| 376 | |
| 377 | static |
| 378 | enum bt_ctf_lttng_live_iterator_status lttng_live_iterator_next_check_stream_state( |
| 379 | struct lttng_live_component *lttng_live, |
| 380 | struct lttng_live_stream_iterator *lttng_live_stream) |
| 381 | { |
| 382 | switch (lttng_live_stream->state) { |
| 383 | case LTTNG_LIVE_STREAM_QUIESCENT: |
| 384 | case LTTNG_LIVE_STREAM_ACTIVE_DATA: |
| 385 | break; |
| 386 | case LTTNG_LIVE_STREAM_ACTIVE_NO_DATA: |
| 387 | /* Invalid state. */ |
| 388 | BT_LOGF("Unexpected stream state \"ACTIVE_NO_DATA\""); |
| 389 | abort(); |
| 390 | case LTTNG_LIVE_STREAM_QUIESCENT_NO_DATA: |
| 391 | /* Invalid state. */ |
| 392 | BT_LOGF("Unexpected stream state \"QUIESCENT_NO_DATA\""); |
| 393 | abort(); |
| 394 | case LTTNG_LIVE_STREAM_EOF: |
| 395 | break; |
| 396 | } |
| 397 | return BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK; |
| 398 | } |
| 399 | |
| 400 | /* |
| 401 | * For active no data stream, fetch next data. It can be either: |
| 402 | * - quiescent: need to put it in the prio heap at quiescent end |
| 403 | * timestamp, |
| 404 | * - have data: need to wire up first event into the prio heap, |
| 405 | * - have no data on this stream at this point: need to retry (AGAIN) or |
| 406 | * return EOF. |
| 407 | */ |
| 408 | static |
| 409 | enum bt_ctf_lttng_live_iterator_status lttng_live_iterator_next_handle_one_no_data_stream( |
| 410 | struct lttng_live_component *lttng_live, |
| 411 | struct lttng_live_stream_iterator *lttng_live_stream) |
| 412 | { |
| 413 | enum bt_ctf_lttng_live_iterator_status ret = |
| 414 | BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK; |
| 415 | struct packet_index index; |
| 416 | enum lttng_live_stream_state orig_state = lttng_live_stream->state; |
| 417 | |
| 418 | if (lttng_live_stream->trace->new_metadata_needed) { |
| 419 | ret = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; |
| 420 | goto end; |
| 421 | } |
| 422 | if (lttng_live_stream->trace->session->new_streams_needed) { |
| 423 | ret = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; |
| 424 | goto end; |
| 425 | } |
| 426 | if (lttng_live_stream->state != LTTNG_LIVE_STREAM_ACTIVE_NO_DATA |
| 427 | && lttng_live_stream->state != LTTNG_LIVE_STREAM_QUIESCENT_NO_DATA) { |
| 428 | goto end; |
| 429 | } |
| 430 | ret = lttng_live_get_next_index(lttng_live, lttng_live_stream, &index); |
| 431 | if (ret != BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK) { |
| 432 | goto end; |
| 433 | } |
| 434 | assert(lttng_live_stream->state != LTTNG_LIVE_STREAM_EOF); |
| 435 | if (lttng_live_stream->state == LTTNG_LIVE_STREAM_QUIESCENT) { |
| 436 | if (orig_state == LTTNG_LIVE_STREAM_QUIESCENT_NO_DATA |
| 437 | && lttng_live_stream->last_returned_inactivity_timestamp == |
| 438 | lttng_live_stream->current_inactivity_timestamp) { |
| 439 | ret = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_AGAIN; |
| 440 | print_stream_state(lttng_live_stream); |
| 441 | } else { |
| 442 | ret = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; |
| 443 | } |
| 444 | goto end; |
| 445 | } |
| 446 | lttng_live_stream->base_offset = index.offset; |
| 447 | lttng_live_stream->offset = index.offset; |
| 448 | lttng_live_stream->len = index.packet_size / CHAR_BIT; |
| 449 | end: |
| 450 | if (ret == BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK) { |
| 451 | ret = lttng_live_iterator_next_check_stream_state( |
| 452 | lttng_live, lttng_live_stream); |
| 453 | } |
| 454 | return ret; |
| 455 | } |
| 456 | |
| 457 | /* |
| 458 | * Creation of the notification requires the ctf trace to be created |
| 459 | * beforehand, but the live protocol gives us all streams (including |
| 460 | * metadata) at once. So we split it in three steps: getting streams, |
| 461 | * getting metadata (which creates the ctf trace), and then creating the |
| 462 | * per-stream notifications. |
| 463 | */ |
| 464 | static |
| 465 | enum bt_ctf_lttng_live_iterator_status lttng_live_get_session( |
| 466 | struct lttng_live_component *lttng_live, |
| 467 | struct lttng_live_session *session) |
| 468 | { |
| 469 | enum bt_ctf_lttng_live_iterator_status status; |
| 470 | struct lttng_live_trace *trace, *t; |
| 471 | |
| 472 | if (lttng_live_attach_session(session)) { |
| 473 | if (lttng_live_is_canceled(lttng_live)) { |
| 474 | return BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_AGAIN; |
| 475 | } else { |
| 476 | return BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_ERROR; |
| 477 | } |
| 478 | } |
| 479 | status = lttng_live_get_new_streams(session); |
| 480 | if (status != BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK && |
| 481 | status != BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_END) { |
| 482 | return status; |
| 483 | } |
| 484 | bt_list_for_each_entry_safe(trace, t, &session->traces, node) { |
| 485 | status = lttng_live_metadata_update(trace); |
| 486 | if (status != BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK && |
| 487 | status != BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_END) { |
| 488 | return status; |
| 489 | } |
| 490 | } |
| 491 | return lttng_live_lazy_notif_init(session); |
| 492 | } |
| 493 | |
| 494 | BT_HIDDEN |
| 495 | void lttng_live_need_new_streams(struct lttng_live_component *lttng_live) |
| 496 | { |
| 497 | struct lttng_live_session *session; |
| 498 | |
| 499 | bt_list_for_each_entry(session, <tng_live->sessions, node) { |
| 500 | session->new_streams_needed = true; |
| 501 | } |
| 502 | } |
| 503 | |
| 504 | static |
| 505 | void lttng_live_force_new_streams_and_metadata(struct lttng_live_component *lttng_live) |
| 506 | { |
| 507 | struct lttng_live_session *session; |
| 508 | |
| 509 | bt_list_for_each_entry(session, <tng_live->sessions, node) { |
| 510 | struct lttng_live_trace *trace; |
| 511 | |
| 512 | session->new_streams_needed = true; |
| 513 | bt_list_for_each_entry(trace, &session->traces, node) { |
| 514 | trace->new_metadata_needed = true; |
| 515 | } |
| 516 | } |
| 517 | } |
| 518 | |
| 519 | static |
| 520 | enum bt_ctf_lttng_live_iterator_status lttng_live_iterator_next_handle_new_streams_and_metadata( |
| 521 | struct lttng_live_component *lttng_live) |
| 522 | { |
| 523 | enum bt_ctf_lttng_live_iterator_status ret = |
| 524 | BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK; |
| 525 | unsigned int nr_sessions_opened = 0; |
| 526 | struct lttng_live_session *session, *s; |
| 527 | |
| 528 | bt_list_for_each_entry_safe(session, s, <tng_live->sessions, node) { |
| 529 | if (session->closed && bt_list_empty(&session->traces)) { |
| 530 | lttng_live_destroy_session(session); |
| 531 | } |
| 532 | } |
| 533 | /* |
| 534 | * Currently, when there are no sessions, we quit immediately. |
| 535 | * We may want to add a component parameter to keep trying until |
| 536 | * we get data in the future. |
| 537 | * Also, in a remotely distant future, we could add a "new |
| 538 | * session" flag to the protocol, which would tell us that we |
| 539 | * need to query for new sessions even though we have sessions |
| 540 | * currently ongoing. |
| 541 | */ |
| 542 | if (bt_list_empty(<tng_live->sessions)) { |
| 543 | ret = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_END; |
| 544 | goto end; |
| 545 | } |
| 546 | bt_list_for_each_entry(session, <tng_live->sessions, node) { |
| 547 | ret = lttng_live_get_session(lttng_live, session); |
| 548 | switch (ret) { |
| 549 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK: |
| 550 | break; |
| 551 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_END: |
| 552 | ret = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK; |
| 553 | break; |
| 554 | default: |
| 555 | goto end; |
| 556 | } |
| 557 | if (!session->closed) { |
| 558 | nr_sessions_opened++; |
| 559 | } |
| 560 | } |
| 561 | end: |
| 562 | if (ret == BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK && !nr_sessions_opened) { |
| 563 | ret = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_END; |
| 564 | } |
| 565 | return ret; |
| 566 | } |
| 567 | |
| 568 | static |
| 569 | enum bt_ctf_lttng_live_iterator_status emit_inactivity_notification( |
| 570 | struct lttng_live_component *lttng_live, |
| 571 | struct lttng_live_stream_iterator *lttng_live_stream, |
| 572 | struct bt_notification **notification, |
| 573 | uint64_t timestamp) |
| 574 | { |
| 575 | enum bt_ctf_lttng_live_iterator_status ret = |
| 576 | BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK; |
| 577 | struct lttng_live_trace *trace; |
| 578 | struct bt_ctf_clock_class *clock_class = NULL; |
| 579 | struct bt_ctf_clock_value *clock_value = NULL; |
| 580 | struct bt_notification *notif = NULL; |
| 581 | int retval; |
| 582 | |
| 583 | trace = lttng_live_stream->trace; |
| 584 | if (!trace) { |
| 585 | goto error; |
| 586 | } |
| 587 | clock_class = bt_clock_class_priority_map_get_clock_class_by_index(trace->cc_prio_map, 0); |
| 588 | if (!clock_class) { |
| 589 | goto error; |
| 590 | } |
| 591 | clock_value = bt_ctf_clock_value_create(clock_class, timestamp); |
| 592 | if (!clock_value) { |
| 593 | goto error; |
| 594 | } |
| 595 | notif = bt_notification_inactivity_create(trace->cc_prio_map); |
| 596 | if (!notif) { |
| 597 | goto error; |
| 598 | } |
| 599 | retval = bt_notification_inactivity_set_clock_value(notif, clock_value); |
| 600 | if (retval) { |
| 601 | goto error; |
| 602 | } |
| 603 | *notification = notif; |
| 604 | end: |
| 605 | bt_put(clock_value); |
| 606 | bt_put(clock_class); |
| 607 | return ret; |
| 608 | |
| 609 | error: |
| 610 | ret = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_ERROR; |
| 611 | bt_put(notif); |
| 612 | goto end; |
| 613 | } |
| 614 | |
| 615 | static |
| 616 | enum bt_ctf_lttng_live_iterator_status lttng_live_iterator_next_handle_one_quiescent_stream( |
| 617 | struct lttng_live_component *lttng_live, |
| 618 | struct lttng_live_stream_iterator *lttng_live_stream, |
| 619 | struct bt_notification **notification) |
| 620 | { |
| 621 | enum bt_ctf_lttng_live_iterator_status ret = |
| 622 | BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK; |
| 623 | struct bt_ctf_clock_class *clock_class = NULL; |
| 624 | struct bt_ctf_clock_value *clock_value = NULL; |
| 625 | |
| 626 | if (lttng_live_stream->state != LTTNG_LIVE_STREAM_QUIESCENT) { |
| 627 | return BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK; |
| 628 | } |
| 629 | |
| 630 | if (lttng_live_stream->current_inactivity_timestamp == |
| 631 | lttng_live_stream->last_returned_inactivity_timestamp) { |
| 632 | lttng_live_stream->state = LTTNG_LIVE_STREAM_QUIESCENT_NO_DATA; |
| 633 | ret = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; |
| 634 | goto end; |
| 635 | } |
| 636 | |
| 637 | ret = emit_inactivity_notification(lttng_live, lttng_live_stream, notification, |
| 638 | (uint64_t) lttng_live_stream->current_inactivity_timestamp); |
| 639 | |
| 640 | lttng_live_stream->last_returned_inactivity_timestamp = |
| 641 | lttng_live_stream->current_inactivity_timestamp; |
| 642 | end: |
| 643 | bt_put(clock_value); |
| 644 | bt_put(clock_class); |
| 645 | return ret; |
| 646 | } |
| 647 | |
| 648 | static |
| 649 | enum bt_ctf_lttng_live_iterator_status lttng_live_iterator_next_handle_one_active_data_stream( |
| 650 | struct lttng_live_component *lttng_live, |
| 651 | struct lttng_live_stream_iterator *lttng_live_stream, |
| 652 | struct bt_notification **notification) |
| 653 | { |
| 654 | enum bt_ctf_lttng_live_iterator_status ret = |
| 655 | BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK; |
| 656 | enum bt_ctf_notif_iter_status status; |
| 657 | struct lttng_live_session *session; |
| 658 | |
| 659 | bt_list_for_each_entry(session, <tng_live->sessions, node) { |
| 660 | struct lttng_live_trace *trace; |
| 661 | |
| 662 | if (session->new_streams_needed) { |
| 663 | return BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; |
| 664 | } |
| 665 | bt_list_for_each_entry(trace, &session->traces, node) { |
| 666 | if (trace->new_metadata_needed) { |
| 667 | return BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; |
| 668 | } |
| 669 | } |
| 670 | } |
| 671 | |
| 672 | if (lttng_live_stream->state != LTTNG_LIVE_STREAM_ACTIVE_DATA) { |
| 673 | return BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_ERROR; |
| 674 | } |
| 675 | if (lttng_live_stream->packet_end_notif_queue) { |
| 676 | *notification = lttng_live_stream->packet_end_notif_queue; |
| 677 | lttng_live_stream->packet_end_notif_queue = NULL; |
| 678 | status = BT_CTF_NOTIF_ITER_STATUS_OK; |
| 679 | } else { |
| 680 | status = bt_ctf_notif_iter_get_next_notification( |
| 681 | lttng_live_stream->notif_iter, |
| 682 | lttng_live_stream->trace->cc_prio_map, |
| 683 | notification); |
| 684 | if (status == BT_CTF_NOTIF_ITER_STATUS_OK) { |
| 685 | /* |
| 686 | * Consider empty packets as inactivity. |
| 687 | */ |
| 688 | if (bt_notification_get_type(*notification) == BT_NOTIFICATION_TYPE_PACKET_END) { |
| 689 | lttng_live_stream->packet_end_notif_queue = *notification; |
| 690 | *notification = NULL; |
| 691 | return emit_inactivity_notification(lttng_live, |
| 692 | lttng_live_stream, notification, |
| 693 | lttng_live_stream->current_packet_end_timestamp); |
| 694 | } |
| 695 | } |
| 696 | } |
| 697 | switch (status) { |
| 698 | case BT_CTF_NOTIF_ITER_STATUS_EOF: |
| 699 | ret = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_END; |
| 700 | break; |
| 701 | case BT_CTF_NOTIF_ITER_STATUS_OK: |
| 702 | ret = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK; |
| 703 | break; |
| 704 | case BT_CTF_NOTIF_ITER_STATUS_AGAIN: |
| 705 | /* |
| 706 | * Continue immediately (end of packet). The next |
| 707 | * get_index may return AGAIN to delay the following |
| 708 | * attempt. |
| 709 | */ |
| 710 | ret = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; |
| 711 | break; |
| 712 | case BT_CTF_NOTIF_ITER_STATUS_INVAL: |
| 713 | /* No argument provided by the user, so don't return INVAL. */ |
| 714 | case BT_CTF_NOTIF_ITER_STATUS_ERROR: |
| 715 | default: |
| 716 | ret = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_ERROR; |
| 717 | break; |
| 718 | } |
| 719 | return ret; |
| 720 | } |
| 721 | |
| 722 | /* |
| 723 | * helper function: |
| 724 | * handle_no_data_streams() |
| 725 | * retry: |
| 726 | * - for each ACTIVE_NO_DATA stream: |
| 727 | * - query relayd for stream data, or quiescence info. |
| 728 | * - if need metadata, get metadata, goto retry. |
| 729 | * - if new stream, get new stream as ACTIVE_NO_DATA, goto retry |
| 730 | * - if quiescent, move to QUIESCENT streams |
| 731 | * - if fetched data, move to ACTIVE_DATA streams |
| 732 | * (at this point each stream either has data, or is quiescent) |
| 733 | * |
| 734 | * |
| 735 | * iterator_next: |
| 736 | * handle_new_streams_and_metadata() |
| 737 | * - query relayd for known streams, add them as ACTIVE_NO_DATA |
| 738 | * - query relayd for metadata |
| 739 | * |
| 740 | * call handle_active_no_data_streams() |
| 741 | * |
| 742 | * handle_quiescent_streams() |
| 743 | * - if at least one stream is ACTIVE_DATA: |
| 744 | * - peek stream event with lowest timestamp -> next_ts |
| 745 | * - for each quiescent stream |
| 746 | * - if next_ts >= quiescent end |
| 747 | * - set state to ACTIVE_NO_DATA |
| 748 | * - else |
| 749 | * - for each quiescent stream |
| 750 | * - set state to ACTIVE_NO_DATA |
| 751 | * |
| 752 | * call handle_active_no_data_streams() |
| 753 | * |
| 754 | * handle_active_data_streams() |
| 755 | * - if at least one stream is ACTIVE_DATA: |
| 756 | * - get stream event with lowest timestamp from heap |
| 757 | * - make that stream event the current notification. |
| 758 | * - move this stream heap position to its next event |
| 759 | * - if we need to fetch data from relayd, move |
| 760 | * stream to ACTIVE_NO_DATA. |
| 761 | * - return OK |
| 762 | * - return AGAIN |
| 763 | * |
| 764 | * end criterion: ctrl-c on client. If relayd exits or the session |
| 765 | * closes on the relay daemon side, we keep on waiting for streams. |
| 766 | * Eventually handle --end timestamp (also an end criterion). |
| 767 | * |
| 768 | * When disconnected from relayd: try to re-connect endlessly. |
| 769 | */ |
| 770 | static |
| 771 | struct bt_notification_iterator_next_method_return lttng_live_iterator_next_stream( |
| 772 | struct bt_private_connection_private_notification_iterator *iterator, |
| 773 | struct lttng_live_stream_iterator *stream_iter) |
| 774 | { |
| 775 | enum bt_ctf_lttng_live_iterator_status status; |
| 776 | struct bt_notification_iterator_next_method_return next_return; |
| 777 | struct lttng_live_component *lttng_live; |
| 778 | |
| 779 | lttng_live = stream_iter->trace->session->lttng_live; |
| 780 | retry: |
| 781 | print_stream_state(stream_iter); |
| 782 | next_return.notification = NULL; |
| 783 | status = lttng_live_iterator_next_handle_new_streams_and_metadata(lttng_live); |
| 784 | if (status != BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK) { |
| 785 | goto end; |
| 786 | } |
| 787 | status = lttng_live_iterator_next_handle_one_no_data_stream( |
| 788 | lttng_live, stream_iter); |
| 789 | if (status != BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK) { |
| 790 | goto end; |
| 791 | } |
| 792 | status = lttng_live_iterator_next_handle_one_quiescent_stream( |
| 793 | lttng_live, stream_iter, &next_return.notification); |
| 794 | if (status != BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK) { |
| 795 | assert(next_return.notification == NULL); |
| 796 | goto end; |
| 797 | } |
| 798 | if (next_return.notification) { |
| 799 | goto end; |
| 800 | } |
| 801 | status = lttng_live_iterator_next_handle_one_active_data_stream(lttng_live, |
| 802 | stream_iter, &next_return.notification); |
| 803 | if (status != BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK) { |
| 804 | assert(next_return.notification == NULL); |
| 805 | } |
| 806 | |
| 807 | end: |
| 808 | switch (status) { |
| 809 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_CONTINUE: |
| 810 | print_dbg("continue"); |
| 811 | goto retry; |
| 812 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_AGAIN: |
| 813 | next_return.status = BT_NOTIFICATION_ITERATOR_STATUS_AGAIN; |
| 814 | print_dbg("again"); |
| 815 | break; |
| 816 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_END: |
| 817 | next_return.status = BT_NOTIFICATION_ITERATOR_STATUS_END; |
| 818 | print_dbg("end"); |
| 819 | break; |
| 820 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK: |
| 821 | next_return.status = BT_NOTIFICATION_ITERATOR_STATUS_OK; |
| 822 | print_dbg("ok"); |
| 823 | break; |
| 824 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_INVAL: |
| 825 | next_return.status = BT_NOTIFICATION_ITERATOR_STATUS_INVALID; |
| 826 | break; |
| 827 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_NOMEM: |
| 828 | next_return.status = BT_NOTIFICATION_ITERATOR_STATUS_NOMEM; |
| 829 | break; |
| 830 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_UNSUPPORTED: |
| 831 | next_return.status = BT_NOTIFICATION_ITERATOR_STATUS_UNSUPPORTED; |
| 832 | break; |
| 833 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_ERROR: |
| 834 | default: /* fall-through */ |
| 835 | next_return.status = BT_NOTIFICATION_ITERATOR_STATUS_ERROR; |
| 836 | break; |
| 837 | } |
| 838 | return next_return; |
| 839 | } |
| 840 | |
| 841 | static |
| 842 | struct bt_notification_iterator_next_method_return lttng_live_iterator_next_no_stream( |
| 843 | struct bt_private_connection_private_notification_iterator *iterator, |
| 844 | struct lttng_live_no_stream_iterator *no_stream_iter) |
| 845 | { |
| 846 | enum bt_ctf_lttng_live_iterator_status status; |
| 847 | struct bt_notification_iterator_next_method_return next_return; |
| 848 | struct lttng_live_component *lttng_live; |
| 849 | |
| 850 | lttng_live = no_stream_iter->lttng_live; |
| 851 | retry: |
| 852 | lttng_live_force_new_streams_and_metadata(lttng_live); |
| 853 | next_return.notification = NULL; |
| 854 | status = lttng_live_iterator_next_handle_new_streams_and_metadata(lttng_live); |
| 855 | if (status != BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK) { |
| 856 | goto end; |
| 857 | } |
| 858 | if (no_stream_iter->port) { |
| 859 | status = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_AGAIN; |
| 860 | } else { |
| 861 | status = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_END; |
| 862 | } |
| 863 | end: |
| 864 | switch (status) { |
| 865 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_CONTINUE: |
| 866 | goto retry; |
| 867 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_AGAIN: |
| 868 | next_return.status = BT_NOTIFICATION_ITERATOR_STATUS_AGAIN; |
| 869 | break; |
| 870 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_END: |
| 871 | next_return.status = BT_NOTIFICATION_ITERATOR_STATUS_END; |
| 872 | break; |
| 873 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_INVAL: |
| 874 | next_return.status = BT_NOTIFICATION_ITERATOR_STATUS_INVALID; |
| 875 | break; |
| 876 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_NOMEM: |
| 877 | next_return.status = BT_NOTIFICATION_ITERATOR_STATUS_NOMEM; |
| 878 | break; |
| 879 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_UNSUPPORTED: |
| 880 | next_return.status = BT_NOTIFICATION_ITERATOR_STATUS_UNSUPPORTED; |
| 881 | break; |
| 882 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_ERROR: |
| 883 | default: /* fall-through */ |
| 884 | next_return.status = BT_NOTIFICATION_ITERATOR_STATUS_ERROR; |
| 885 | break; |
| 886 | } |
| 887 | return next_return; |
| 888 | } |
| 889 | |
| 890 | BT_HIDDEN |
| 891 | struct bt_notification_iterator_next_method_return lttng_live_iterator_next( |
| 892 | struct bt_private_connection_private_notification_iterator *iterator) |
| 893 | { |
| 894 | struct lttng_live_stream_iterator_generic *s = |
| 895 | bt_private_connection_private_notification_iterator_get_user_data(iterator); |
| 896 | struct bt_notification_iterator_next_method_return next_return; |
| 897 | |
| 898 | switch (s->type) { |
| 899 | case LIVE_STREAM_TYPE_NO_STREAM: |
| 900 | next_return = lttng_live_iterator_next_no_stream(iterator, |
| 901 | container_of(s, struct lttng_live_no_stream_iterator, p)); |
| 902 | break; |
| 903 | case LIVE_STREAM_TYPE_STREAM: |
| 904 | next_return = lttng_live_iterator_next_stream(iterator, |
| 905 | container_of(s, struct lttng_live_stream_iterator, p)); |
| 906 | break; |
| 907 | default: |
| 908 | next_return.status = BT_NOTIFICATION_ITERATOR_STATUS_ERROR; |
| 909 | break; |
| 910 | } |
| 911 | return next_return; |
| 912 | } |
| 913 | |
| 914 | BT_HIDDEN |
| 915 | enum bt_notification_iterator_status lttng_live_iterator_init( |
| 916 | struct bt_private_connection_private_notification_iterator *it, |
| 917 | struct bt_private_port *port) |
| 918 | { |
| 919 | enum bt_notification_iterator_status ret = |
| 920 | BT_NOTIFICATION_ITERATOR_STATUS_OK; |
| 921 | struct lttng_live_stream_iterator_generic *s; |
| 922 | |
| 923 | assert(it); |
| 924 | |
| 925 | s = bt_private_port_get_user_data(port); |
| 926 | assert(s); |
| 927 | switch (s->type) { |
| 928 | case LIVE_STREAM_TYPE_NO_STREAM: |
| 929 | { |
| 930 | struct lttng_live_no_stream_iterator *no_stream_iter = |
| 931 | container_of(s, struct lttng_live_no_stream_iterator, p); |
| 932 | ret = bt_private_connection_private_notification_iterator_set_user_data(it, no_stream_iter); |
| 933 | if (ret) { |
| 934 | goto error; |
| 935 | } |
| 936 | break; |
| 937 | } |
| 938 | case LIVE_STREAM_TYPE_STREAM: |
| 939 | { |
| 940 | struct lttng_live_stream_iterator *stream_iter = |
| 941 | container_of(s, struct lttng_live_stream_iterator, p); |
| 942 | ret = bt_private_connection_private_notification_iterator_set_user_data(it, stream_iter); |
| 943 | if (ret) { |
| 944 | goto error; |
| 945 | } |
| 946 | break; |
| 947 | } |
| 948 | default: |
| 949 | ret = BT_NOTIFICATION_ITERATOR_STATUS_ERROR; |
| 950 | goto end; |
| 951 | } |
| 952 | |
| 953 | end: |
| 954 | return ret; |
| 955 | error: |
| 956 | if (bt_private_connection_private_notification_iterator_set_user_data(it, NULL) |
| 957 | != BT_NOTIFICATION_ITERATOR_STATUS_OK) { |
| 958 | BT_LOGE("Error setting private data to NULL"); |
| 959 | } |
| 960 | goto end; |
| 961 | } |
| 962 | |
| 963 | static |
| 964 | struct bt_component_class_query_method_return lttng_live_query_list_sessions( |
| 965 | struct bt_component_class *comp_class, |
| 966 | struct bt_query_executor *query_exec, |
| 967 | struct bt_value *params) |
| 968 | { |
| 969 | struct bt_component_class_query_method_return query_ret = { |
| 970 | .result = NULL, |
| 971 | .status = BT_QUERY_STATUS_OK, |
| 972 | }; |
| 973 | |
| 974 | struct bt_value *url_value = NULL; |
| 975 | const char *url; |
| 976 | struct bt_live_viewer_connection *viewer_connection = NULL; |
| 977 | |
| 978 | url_value = bt_value_map_get(params, "url"); |
| 979 | if (!url_value || bt_value_is_null(url_value) || !bt_value_is_string(url_value)) { |
| 980 | BT_LOGW("Mandatory \"url\" parameter missing"); |
| 981 | query_ret.status = BT_QUERY_STATUS_INVALID_PARAMS; |
| 982 | goto error; |
| 983 | } |
| 984 | |
| 985 | if (bt_value_string_get(url_value, &url) != BT_VALUE_STATUS_OK) { |
| 986 | BT_LOGW("\"url\" parameter is required to be a string value"); |
| 987 | query_ret.status = BT_QUERY_STATUS_INVALID_PARAMS; |
| 988 | goto error; |
| 989 | } |
| 990 | |
| 991 | viewer_connection = bt_live_viewer_connection_create(url, NULL); |
| 992 | if (!viewer_connection) { |
| 993 | goto error; |
| 994 | } |
| 995 | |
| 996 | query_ret.result = |
| 997 | bt_live_viewer_connection_list_sessions(viewer_connection); |
| 998 | if (!query_ret.result) { |
| 999 | goto error; |
| 1000 | } |
| 1001 | |
| 1002 | goto end; |
| 1003 | |
| 1004 | error: |
| 1005 | BT_PUT(query_ret.result); |
| 1006 | |
| 1007 | if (query_ret.status >= 0) { |
| 1008 | query_ret.status = BT_QUERY_STATUS_ERROR; |
| 1009 | } |
| 1010 | |
| 1011 | end: |
| 1012 | if (viewer_connection) { |
| 1013 | bt_live_viewer_connection_destroy(viewer_connection); |
| 1014 | } |
| 1015 | BT_PUT(url_value); |
| 1016 | return query_ret; |
| 1017 | } |
| 1018 | |
| 1019 | BT_HIDDEN |
| 1020 | struct bt_component_class_query_method_return lttng_live_query( |
| 1021 | struct bt_component_class *comp_class, |
| 1022 | struct bt_query_executor *query_exec, |
| 1023 | const char *object, struct bt_value *params) |
| 1024 | { |
| 1025 | struct bt_component_class_query_method_return ret = { |
| 1026 | .result = NULL, |
| 1027 | .status = BT_QUERY_STATUS_OK, |
| 1028 | }; |
| 1029 | |
| 1030 | if (strcmp(object, "sessions") == 0) { |
| 1031 | return lttng_live_query_list_sessions(comp_class, |
| 1032 | query_exec, params); |
| 1033 | } |
| 1034 | BT_LOGW("Unknown query object `%s`", object); |
| 1035 | ret.status = BT_QUERY_STATUS_INVALID_OBJECT; |
| 1036 | return ret; |
| 1037 | } |
| 1038 | |
| 1039 | static |
| 1040 | void lttng_live_component_destroy_data(struct lttng_live_component *lttng_live) |
| 1041 | { |
| 1042 | int ret; |
| 1043 | struct lttng_live_session *session, *s; |
| 1044 | |
| 1045 | bt_list_for_each_entry_safe(session, s, <tng_live->sessions, node) { |
| 1046 | lttng_live_destroy_session(session); |
| 1047 | } |
| 1048 | BT_PUT(lttng_live->viewer_connection); |
| 1049 | if (lttng_live->url) { |
| 1050 | g_string_free(lttng_live->url, TRUE); |
| 1051 | } |
| 1052 | if (lttng_live->no_stream_port) { |
| 1053 | bt_get(lttng_live->no_stream_port); |
| 1054 | ret = bt_private_port_remove_from_component(lttng_live->no_stream_port); |
| 1055 | bt_put(lttng_live->no_stream_port); |
| 1056 | assert(!ret); |
| 1057 | } |
| 1058 | if (lttng_live->no_stream_iter) { |
| 1059 | g_free(lttng_live->no_stream_iter); |
| 1060 | } |
| 1061 | g_free(lttng_live); |
| 1062 | } |
| 1063 | |
| 1064 | BT_HIDDEN |
| 1065 | void lttng_live_component_finalize(struct bt_private_component *component) |
| 1066 | { |
| 1067 | void *data = bt_private_component_get_user_data(component); |
| 1068 | |
| 1069 | if (!data) { |
| 1070 | return; |
| 1071 | } |
| 1072 | lttng_live_component_destroy_data(data); |
| 1073 | } |
| 1074 | |
| 1075 | static |
| 1076 | struct lttng_live_component *lttng_live_component_create(struct bt_value *params, |
| 1077 | struct bt_private_component *private_component) |
| 1078 | { |
| 1079 | struct lttng_live_component *lttng_live; |
| 1080 | struct bt_value *value = NULL; |
| 1081 | const char *url; |
| 1082 | enum bt_value_status ret; |
| 1083 | |
| 1084 | lttng_live = g_new0(struct lttng_live_component, 1); |
| 1085 | if (!lttng_live) { |
| 1086 | goto end; |
| 1087 | } |
| 1088 | /* TODO: make this an overridable parameter. */ |
| 1089 | lttng_live->max_query_size = MAX_QUERY_SIZE; |
| 1090 | BT_INIT_LIST_HEAD(<tng_live->sessions); |
| 1091 | value = bt_value_map_get(params, "url"); |
| 1092 | if (!value || bt_value_is_null(value) || !bt_value_is_string(value)) { |
| 1093 | BT_LOGW("Mandatory \"url\" parameter missing"); |
| 1094 | goto error; |
| 1095 | } |
| 1096 | ret = bt_value_string_get(value, &url); |
| 1097 | if (ret != BT_VALUE_STATUS_OK) { |
| 1098 | BT_LOGW("\"url\" parameter is required to be a string value"); |
| 1099 | goto error; |
| 1100 | } |
| 1101 | lttng_live->url = g_string_new(url); |
| 1102 | if (!lttng_live->url) { |
| 1103 | goto error; |
| 1104 | } |
| 1105 | BT_PUT(value); |
| 1106 | lttng_live->viewer_connection = |
| 1107 | bt_live_viewer_connection_create(lttng_live->url->str, lttng_live); |
| 1108 | if (!lttng_live->viewer_connection) { |
| 1109 | goto error; |
| 1110 | } |
| 1111 | if (lttng_live_create_viewer_session(lttng_live)) { |
| 1112 | goto error; |
| 1113 | } |
| 1114 | lttng_live->private_component = private_component; |
| 1115 | |
| 1116 | goto end; |
| 1117 | |
| 1118 | error: |
| 1119 | lttng_live_component_destroy_data(lttng_live); |
| 1120 | lttng_live = NULL; |
| 1121 | end: |
| 1122 | return lttng_live; |
| 1123 | } |
| 1124 | |
| 1125 | BT_HIDDEN |
| 1126 | enum bt_component_status lttng_live_component_init( |
| 1127 | struct bt_private_component *private_component, |
| 1128 | struct bt_value *params, void *init_method_data) |
| 1129 | { |
| 1130 | struct lttng_live_component *lttng_live; |
| 1131 | enum bt_component_status ret = BT_COMPONENT_STATUS_OK; |
| 1132 | |
| 1133 | /* Passes ownership of iter ref to lttng_live_component_create. */ |
| 1134 | lttng_live = lttng_live_component_create(params, private_component); |
| 1135 | if (!lttng_live) { |
| 1136 | //TODO : we need access to the application cancel state |
| 1137 | //because we are not part of a graph yet. |
| 1138 | ret = BT_COMPONENT_STATUS_NOMEM; |
| 1139 | goto end; |
| 1140 | } |
| 1141 | |
| 1142 | lttng_live->no_stream_iter = g_new0(struct lttng_live_no_stream_iterator, 1); |
| 1143 | lttng_live->no_stream_iter->p.type = LIVE_STREAM_TYPE_NO_STREAM; |
| 1144 | lttng_live->no_stream_iter->lttng_live = lttng_live; |
| 1145 | if (lttng_live_is_canceled(lttng_live)) { |
| 1146 | goto end; |
| 1147 | } |
| 1148 | ret = bt_private_component_source_add_output_private_port( |
| 1149 | lttng_live->private_component, "no-stream", |
| 1150 | lttng_live->no_stream_iter, |
| 1151 | <tng_live->no_stream_port); |
| 1152 | if (ret != BT_COMPONENT_STATUS_OK) { |
| 1153 | goto end; |
| 1154 | } |
| 1155 | bt_put(lttng_live->no_stream_port); /* weak */ |
| 1156 | lttng_live->no_stream_iter->port = lttng_live->no_stream_port; |
| 1157 | |
| 1158 | ret = bt_private_component_set_user_data(private_component, lttng_live); |
| 1159 | if (ret != BT_COMPONENT_STATUS_OK) { |
| 1160 | goto error; |
| 1161 | } |
| 1162 | |
| 1163 | end: |
| 1164 | return ret; |
| 1165 | error: |
| 1166 | (void) bt_private_component_set_user_data(private_component, NULL); |
| 1167 | lttng_live_component_destroy_data(lttng_live); |
| 1168 | return ret; |
| 1169 | } |
| 1170 | |
| 1171 | BT_HIDDEN |
| 1172 | enum bt_component_status lttng_live_accept_port_connection( |
| 1173 | struct bt_private_component *private_component, |
| 1174 | struct bt_private_port *self_private_port, |
| 1175 | struct bt_port *other_port) |
| 1176 | { |
| 1177 | struct lttng_live_component *lttng_live = |
| 1178 | bt_private_component_get_user_data(private_component); |
| 1179 | struct bt_component *other_component; |
| 1180 | enum bt_component_status status = BT_COMPONENT_STATUS_OK; |
| 1181 | struct bt_port *self_port = bt_port_from_private_port(self_private_port); |
| 1182 | |
| 1183 | other_component = bt_port_get_component(other_port); |
| 1184 | bt_put(other_component); /* weak */ |
| 1185 | |
| 1186 | if (!lttng_live->downstream_component) { |
| 1187 | lttng_live->downstream_component = other_component; |
| 1188 | goto end; |
| 1189 | } |
| 1190 | |
| 1191 | /* |
| 1192 | * Compare prior component to ensure we are connected to the |
| 1193 | * same downstream component as prior ports. |
| 1194 | */ |
| 1195 | if (lttng_live->downstream_component != other_component) { |
| 1196 | BT_LOGW("Cannot connect ctf.lttng-live component port \"%s\" to component \"%s\": already connected to component \"%s\".", |
| 1197 | bt_port_get_name(self_port), |
| 1198 | bt_component_get_name(other_component), |
| 1199 | bt_component_get_name(lttng_live->downstream_component)); |
| 1200 | status = BT_COMPONENT_STATUS_REFUSE_PORT_CONNECTION; |
| 1201 | goto end; |
| 1202 | } |
| 1203 | end: |
| 1204 | bt_put(self_port); |
| 1205 | return status; |
| 1206 | } |