Commit | Line | Data |
---|---|---|
2a174661 DG |
1 | /* |
2 | * Copyright (C) 2013 - Julien Desfossez <jdesfossez@efficios.com> | |
3 | * David Goulet <dgoulet@efficios.com> | |
7591bab1 | 4 | * 2015 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
c35f9726 | 5 | * 2019 - Jérémie Galarneau <jeremie.galarneau@efficios.com> |
2a174661 DG |
6 | * |
7 | * This program is free software; you can redistribute it and/or modify it | |
8 | * under the terms of the GNU General Public License, version 2 only, as | |
9 | * published by the Free Software Foundation. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
14 | * more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License along with | |
17 | * this program; if not, write to the Free Software Foundation, Inc., 51 | |
18 | * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
19 | */ | |
20 | ||
6c1c0768 | 21 | #define _LGPL_SOURCE |
2a174661 | 22 | #include <common/common.h> |
7591bab1 MD |
23 | #include <common/utils.h> |
24 | #include <common/defaults.h> | |
c35f9726 | 25 | #include <common/sessiond-comm/relayd.h> |
7591bab1 MD |
26 | #include <urcu/rculist.h> |
27 | #include <sys/stat.h> | |
2a174661 | 28 | |
7591bab1 | 29 | #include "lttng-relayd.h" |
2a174661 DG |
30 | #include "index.h" |
31 | #include "stream.h" | |
32 | #include "viewer-stream.h" | |
33 | ||
348a81dc JG |
34 | #include <sys/types.h> |
35 | #include <fcntl.h> | |
36 | ||
c35f9726 JG |
37 | #define FILE_IO_STACK_BUFFER_SIZE 65536 |
38 | ||
7591bab1 MD |
39 | /* Should be called with RCU read-side lock held. */ |
40 | bool stream_get(struct relay_stream *stream) | |
41 | { | |
ce4d4083 | 42 | return urcu_ref_get_unless_zero(&stream->ref); |
7591bab1 MD |
43 | } |
44 | ||
2a174661 | 45 | /* |
7591bab1 MD |
46 | * Get stream from stream id from the streams hash table. Return stream |
47 | * if found else NULL. A stream reference is taken when a stream is | |
48 | * returned. stream_put() must be called on that stream. | |
2a174661 | 49 | */ |
7591bab1 | 50 | struct relay_stream *stream_get_by_id(uint64_t stream_id) |
2a174661 DG |
51 | { |
52 | struct lttng_ht_node_u64 *node; | |
53 | struct lttng_ht_iter iter; | |
54 | struct relay_stream *stream = NULL; | |
55 | ||
7591bab1 MD |
56 | rcu_read_lock(); |
57 | lttng_ht_lookup(relay_streams_ht, &stream_id, &iter); | |
2a174661 | 58 | node = lttng_ht_iter_get_node_u64(&iter); |
7591bab1 | 59 | if (!node) { |
2a174661 DG |
60 | DBG("Relay stream %" PRIu64 " not found", stream_id); |
61 | goto end; | |
62 | } | |
63 | stream = caa_container_of(node, struct relay_stream, node); | |
7591bab1 MD |
64 | if (!stream_get(stream)) { |
65 | stream = NULL; | |
66 | } | |
2a174661 | 67 | end: |
7591bab1 | 68 | rcu_read_unlock(); |
2a174661 DG |
69 | return stream; |
70 | } | |
71 | ||
c35f9726 JG |
72 | static void stream_complete_rotation(struct relay_stream *stream) |
73 | { | |
74 | DBG("Rotation completed for stream %" PRIu64, stream->stream_handle); | |
75 | lttng_trace_chunk_put(stream->trace_chunk); | |
76 | stream->trace_chunk = stream->ongoing_rotation.value.next_trace_chunk; | |
77 | stream->ongoing_rotation = (typeof(stream->ongoing_rotation)) {}; | |
78 | } | |
79 | ||
80 | /* | |
81 | * If too much data has been written in a tracefile before we received the | |
82 | * rotation command, we have to move the excess data to the new tracefile and | |
83 | * perform the rotation. This can happen because the control and data | |
84 | * connections are separate, the indexes as well as the commands arrive from | |
85 | * the control connection and we have no control over the order so we could be | |
86 | * in a situation where too much data has been received on the data connection | |
87 | * before the rotation command on the control connection arrives. | |
88 | */ | |
89 | static int rotate_truncate_stream(struct relay_stream *stream) | |
90 | { | |
91 | int ret, new_fd; | |
92 | off_t lseek_ret; | |
93 | uint64_t diff, pos = 0; | |
94 | char buf[FILE_IO_STACK_BUFFER_SIZE]; | |
95 | ||
96 | assert(!stream->is_metadata); | |
97 | ||
98 | assert(stream->tracefile_size_current > | |
99 | stream->pos_after_last_complete_data_index); | |
100 | diff = stream->tracefile_size_current - | |
101 | stream->pos_after_last_complete_data_index; | |
102 | ||
103 | /* Create the new tracefile. */ | |
104 | new_fd = utils_create_stream_file(stream->path_name, | |
105 | stream->channel_name, | |
106 | stream->tracefile_size, stream->tracefile_count, | |
107 | /* uid */ -1, /* gid */ -1, /* suffix */ NULL); | |
108 | if (new_fd < 0) { | |
109 | ERR("Failed to create new stream file at path %s for channel %s", | |
110 | stream->path_name, stream->channel_name); | |
111 | ret = -1; | |
112 | goto end; | |
113 | } | |
114 | ||
115 | /* | |
116 | * Rewind the current tracefile to the position at which the rotation | |
117 | * should have occurred. | |
118 | */ | |
119 | lseek_ret = lseek(stream->stream_fd->fd, | |
120 | stream->pos_after_last_complete_data_index, SEEK_SET); | |
121 | if (lseek_ret < 0) { | |
122 | PERROR("seek truncate stream"); | |
123 | ret = -1; | |
124 | goto end; | |
125 | } | |
126 | ||
127 | /* Move data from the old file to the new file. */ | |
128 | while (pos < diff) { | |
129 | uint64_t count, bytes_left; | |
130 | ssize_t io_ret; | |
131 | ||
132 | bytes_left = diff - pos; | |
133 | count = bytes_left > sizeof(buf) ? sizeof(buf) : bytes_left; | |
134 | assert(count <= SIZE_MAX); | |
135 | ||
136 | io_ret = lttng_read(stream->stream_fd->fd, buf, count); | |
137 | if (io_ret < (ssize_t) count) { | |
138 | char error_string[256]; | |
139 | ||
140 | snprintf(error_string, sizeof(error_string), | |
141 | "Failed to read %" PRIu64 " bytes from fd %i in rotate_truncate_stream(), returned %zi", | |
142 | count, stream->stream_fd->fd, io_ret); | |
143 | if (io_ret == -1) { | |
144 | PERROR("%s", error_string); | |
145 | } else { | |
146 | ERR("%s", error_string); | |
147 | } | |
148 | ret = -1; | |
149 | goto end; | |
150 | } | |
151 | ||
152 | io_ret = lttng_write(new_fd, buf, count); | |
153 | if (io_ret < (ssize_t) count) { | |
154 | char error_string[256]; | |
155 | ||
156 | snprintf(error_string, sizeof(error_string), | |
157 | "Failed to write %" PRIu64 " bytes from fd %i in rotate_truncate_stream(), returned %zi", | |
158 | count, new_fd, io_ret); | |
159 | if (io_ret == -1) { | |
160 | PERROR("%s", error_string); | |
161 | } else { | |
162 | ERR("%s", error_string); | |
163 | } | |
164 | ret = -1; | |
165 | goto end; | |
166 | } | |
167 | ||
168 | pos += count; | |
169 | } | |
170 | ||
171 | /* Truncate the file to get rid of the excess data. */ | |
172 | ret = ftruncate(stream->stream_fd->fd, | |
173 | stream->pos_after_last_complete_data_index); | |
174 | if (ret) { | |
175 | PERROR("ftruncate"); | |
176 | goto end; | |
177 | } | |
178 | ||
179 | ret = close(stream->stream_fd->fd); | |
180 | if (ret < 0) { | |
181 | PERROR("Closing tracefile"); | |
182 | goto end; | |
183 | } | |
184 | ||
185 | /* | |
186 | * Update the offset and FD of all the eventual indexes created by the | |
187 | * data connection before the rotation command arrived. | |
188 | */ | |
189 | ret = relay_index_switch_all_files(stream); | |
190 | if (ret < 0) { | |
191 | ERR("Failed to rotate index file"); | |
192 | goto end; | |
193 | } | |
194 | ||
195 | stream->stream_fd->fd = new_fd; | |
196 | stream->tracefile_size_current = diff; | |
197 | stream->pos_after_last_complete_data_index = 0; | |
198 | stream_complete_rotation(stream); | |
199 | ||
200 | ret = 0; | |
201 | ||
202 | end: | |
203 | return ret; | |
204 | } | |
205 | ||
206 | static int stream_create_data_output_file_from_trace_chunk( | |
207 | struct relay_stream *stream, | |
208 | struct lttng_trace_chunk *trace_chunk, | |
209 | bool force_unlink, | |
210 | struct stream_fd **out_stream_fd) | |
348a81dc JG |
211 | { |
212 | int ret, fd; | |
c35f9726 | 213 | char stream_path[LTTNG_PATH_MAX]; |
348a81dc JG |
214 | enum lttng_trace_chunk_status status; |
215 | const int flags = O_RDWR | O_CREAT | O_TRUNC; | |
216 | const mode_t mode = S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP; | |
348a81dc JG |
217 | |
218 | ASSERT_LOCKED(stream->lock); | |
219 | assert(stream->trace_chunk); | |
220 | ||
348a81dc | 221 | ret = utils_stream_file_path(stream->path_name, stream->channel_name, |
c35f9726 JG |
222 | stream->tracefile_size, stream->tracefile_current_index, |
223 | NULL, stream_path, sizeof(stream_path)); | |
348a81dc JG |
224 | if (ret < 0) { |
225 | goto end; | |
226 | } | |
227 | ||
c35f9726 JG |
228 | if (stream->tracefile_wrapped_around || force_unlink) { |
229 | /* | |
230 | * The on-disk ring-buffer has wrapped around. | |
231 | * Newly created stream files will replace existing files. Since | |
232 | * live clients may be consuming existing files, the file about | |
233 | * to be replaced is unlinked in order to not overwrite its | |
234 | * content. | |
235 | */ | |
236 | status = lttng_trace_chunk_unlink_file(trace_chunk, | |
237 | stream_path); | |
238 | if (status != LTTNG_TRACE_CHUNK_STATUS_OK) { | |
239 | PERROR("Failed to unlink stream file \"%s\" during trace file rotation", | |
240 | stream_path); | |
241 | /* | |
242 | * Don't abort if the file doesn't exist, it is | |
243 | * unexpected, but should not be a fatal error. | |
244 | */ | |
245 | if (errno != ENOENT) { | |
246 | ret = -1; | |
247 | goto end; | |
248 | } | |
249 | } | |
250 | } | |
251 | ||
348a81dc | 252 | status = lttng_trace_chunk_open_file( |
c35f9726 | 253 | trace_chunk, stream_path, flags, mode, &fd); |
348a81dc JG |
254 | if (status != LTTNG_TRACE_CHUNK_STATUS_OK) { |
255 | ERR("Failed to open stream file \"%s\"", stream->channel_name); | |
256 | ret = -1; | |
257 | goto end; | |
258 | } | |
259 | ||
c35f9726 JG |
260 | *out_stream_fd = stream_fd_create(fd); |
261 | if (!*out_stream_fd) { | |
348a81dc JG |
262 | if (close(ret)) { |
263 | PERROR("Error closing stream file descriptor %d", ret); | |
264 | } | |
265 | ret = -1; | |
266 | goto end; | |
267 | } | |
268 | end: | |
269 | return ret; | |
270 | } | |
271 | ||
c35f9726 JG |
272 | static int stream_rotate_data_file(struct relay_stream *stream) |
273 | { | |
274 | int ret = 0; | |
275 | ||
276 | DBG("Rotating stream %" PRIu64 " data file", | |
277 | stream->stream_handle); | |
278 | ||
279 | if (stream->stream_fd) { | |
280 | stream_fd_put(stream->stream_fd); | |
281 | stream->stream_fd = NULL; | |
282 | } | |
283 | ||
284 | stream->tracefile_wrapped_around = false; | |
285 | stream->tracefile_current_index = 0; | |
286 | ||
287 | if (stream->ongoing_rotation.value.next_trace_chunk) { | |
288 | struct stream_fd *new_stream_fd = NULL; | |
289 | enum lttng_trace_chunk_status chunk_status; | |
290 | ||
291 | chunk_status = lttng_trace_chunk_create_subdirectory( | |
292 | stream->ongoing_rotation.value.next_trace_chunk, | |
293 | stream->path_name); | |
294 | if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) { | |
295 | ret = -1; | |
296 | goto end; | |
297 | } | |
298 | ||
299 | /* Rotate the data file. */ | |
300 | ret = stream_create_data_output_file_from_trace_chunk(stream, | |
301 | stream->ongoing_rotation.value.next_trace_chunk, | |
302 | false, &new_stream_fd); | |
303 | stream->stream_fd = new_stream_fd; | |
304 | if (ret < 0) { | |
305 | ERR("Failed to rotate stream data file"); | |
306 | goto end; | |
307 | } | |
308 | } | |
309 | stream->tracefile_size_current = 0; | |
310 | stream->pos_after_last_complete_data_index = 0; | |
311 | stream->ongoing_rotation.value.data_rotated = true; | |
312 | ||
313 | if (stream->ongoing_rotation.value.index_rotated) { | |
314 | /* Rotation completed; reset its state. */ | |
315 | stream_complete_rotation(stream); | |
316 | } | |
317 | end: | |
318 | return ret; | |
319 | } | |
320 | ||
321 | /* | |
322 | * Check if a stream's data file (as opposed to index) should be rotated | |
323 | * (for session rotation). | |
324 | * Must be called with the stream lock held. | |
325 | * | |
326 | * Return 0 on success, a negative value on error. | |
327 | */ | |
328 | static int try_rotate_stream_data(struct relay_stream *stream) | |
329 | { | |
330 | int ret = 0; | |
331 | ||
332 | if (caa_likely(!stream->ongoing_rotation.is_set)) { | |
333 | /* No rotation expected. */ | |
334 | goto end; | |
335 | } | |
336 | ||
337 | if (stream->ongoing_rotation.value.data_rotated) { | |
338 | /* Rotation of the data file has already occurred. */ | |
339 | goto end; | |
340 | } | |
341 | ||
342 | if (stream->prev_data_seq == -1ULL || | |
343 | stream->prev_data_seq + 1 < stream->ongoing_rotation.value.seq_num) { | |
344 | /* | |
345 | * The next packet that will be written is not part of the next | |
346 | * chunk yet. | |
347 | */ | |
348 | DBG("Stream %" PRIu64 " not yet ready for rotation (rotate_at_seq_num = %" PRIu64 | |
349 | ", prev_data_seq = %" PRIu64 ")", | |
350 | stream->stream_handle, | |
351 | stream->ongoing_rotation.value.seq_num, | |
352 | stream->prev_data_seq); | |
353 | goto end; | |
354 | } else if (stream->prev_data_seq > stream->ongoing_rotation.value.seq_num) { | |
355 | /* | |
356 | * prev_data_seq is checked here since indexes and rotation | |
357 | * commands are serialized with respect to each other. | |
358 | */ | |
359 | DBG("Rotation after too much data has been written in tracefile " | |
360 | "for stream %" PRIu64 ", need to truncate before " | |
361 | "rotating", stream->stream_handle); | |
362 | ret = rotate_truncate_stream(stream); | |
363 | if (ret) { | |
364 | ERR("Failed to truncate stream"); | |
365 | goto end; | |
366 | } | |
367 | } else { | |
368 | ret = stream_rotate_data_file(stream); | |
369 | } | |
370 | ||
371 | end: | |
372 | return ret; | |
373 | } | |
374 | ||
375 | /* | |
376 | * Close the current index file if it is open, and create a new one. | |
377 | * | |
378 | * Return 0 on success, -1 on error. | |
379 | */ | |
380 | static int create_index_file(struct relay_stream *stream, | |
381 | struct lttng_trace_chunk *chunk) | |
382 | { | |
383 | int ret; | |
384 | uint32_t major, minor; | |
385 | char *index_subpath = NULL; | |
3a735fa7 | 386 | enum lttng_trace_chunk_status status; |
c35f9726 JG |
387 | |
388 | ASSERT_LOCKED(stream->lock); | |
389 | ||
390 | /* Put ref on previous index_file. */ | |
391 | if (stream->index_file) { | |
392 | lttng_index_file_put(stream->index_file); | |
393 | stream->index_file = NULL; | |
394 | } | |
395 | major = stream->trace->session->major; | |
396 | minor = stream->trace->session->minor; | |
397 | ||
398 | if (!chunk) { | |
399 | ret = 0; | |
400 | goto end; | |
401 | } | |
402 | ret = asprintf(&index_subpath, "%s/%s", stream->path_name, | |
403 | DEFAULT_INDEX_DIR); | |
404 | if (ret < 0) { | |
405 | goto end; | |
406 | } | |
407 | ||
3a735fa7 | 408 | status = lttng_trace_chunk_create_subdirectory(chunk, |
c35f9726 JG |
409 | index_subpath); |
410 | free(index_subpath); | |
3a735fa7 MD |
411 | if (status != LTTNG_TRACE_CHUNK_STATUS_OK) { |
412 | ret = -1; | |
c35f9726 JG |
413 | goto end; |
414 | } | |
415 | stream->index_file = lttng_index_file_create_from_trace_chunk( | |
416 | chunk, stream->path_name, | |
417 | stream->channel_name, stream->tracefile_size, | |
418 | stream->tracefile_current_index, | |
419 | lttng_to_index_major(major, minor), | |
420 | lttng_to_index_minor(major, minor), true); | |
421 | if (!stream->index_file) { | |
422 | ret = -1; | |
423 | goto end; | |
424 | } | |
425 | ||
426 | ret = 0; | |
427 | ||
428 | end: | |
429 | return ret; | |
430 | } | |
431 | ||
432 | /* | |
433 | * Check if a stream's index file should be rotated (for session rotation). | |
434 | * Must be called with the stream lock held. | |
435 | * | |
436 | * Return 0 on success, a negative value on error. | |
437 | */ | |
438 | static int try_rotate_stream_index(struct relay_stream *stream) | |
439 | { | |
440 | int ret = 0; | |
441 | ||
442 | if (!stream->ongoing_rotation.is_set) { | |
443 | /* No rotation expected. */ | |
444 | goto end; | |
445 | } | |
446 | ||
447 | if (stream->ongoing_rotation.value.index_rotated) { | |
448 | /* Rotation of the index has already occurred. */ | |
449 | goto end; | |
450 | } | |
451 | ||
452 | if (stream->prev_index_seq == -1ULL || | |
453 | stream->prev_index_seq + 1 < stream->ongoing_rotation.value.seq_num) { | |
454 | DBG("Stream %" PRIu64 " index not yet ready for rotation (rotate_at_seq_num = %" PRIu64 ", prev_index_seq = %" PRIu64 ")", | |
455 | stream->stream_handle, | |
456 | stream->ongoing_rotation.value.seq_num, | |
457 | stream->prev_index_seq); | |
458 | goto end; | |
459 | } else { | |
460 | /* The next index belongs to the new trace chunk; rotate. */ | |
461 | assert(stream->prev_index_seq + 1 == | |
462 | stream->ongoing_rotation.value.seq_num); | |
463 | DBG("Rotating stream %" PRIu64 " index file", | |
464 | stream->stream_handle); | |
465 | ret = create_index_file(stream, | |
466 | stream->ongoing_rotation.value.next_trace_chunk); | |
467 | stream->ongoing_rotation.value.index_rotated = true; | |
468 | ||
469 | if (stream->ongoing_rotation.value.data_rotated && | |
470 | stream->ongoing_rotation.value.index_rotated) { | |
471 | /* Rotation completed; reset its state. */ | |
472 | DBG("Rotation completed for stream %" PRIu64, | |
473 | stream->stream_handle); | |
474 | stream_complete_rotation(stream); | |
475 | } | |
476 | } | |
477 | ||
478 | end: | |
479 | return ret; | |
480 | } | |
481 | ||
348a81dc JG |
482 | static int stream_set_trace_chunk(struct relay_stream *stream, |
483 | struct lttng_trace_chunk *chunk) | |
484 | { | |
485 | int ret = 0; | |
486 | enum lttng_trace_chunk_status status; | |
487 | bool acquired_reference; | |
c35f9726 | 488 | struct stream_fd *new_stream_fd = NULL; |
348a81dc | 489 | |
348a81dc JG |
490 | status = lttng_trace_chunk_create_subdirectory(chunk, |
491 | stream->path_name); | |
492 | if (status != LTTNG_TRACE_CHUNK_STATUS_OK) { | |
493 | ret = -1; | |
494 | goto end; | |
495 | } | |
496 | ||
497 | lttng_trace_chunk_put(stream->trace_chunk); | |
498 | acquired_reference = lttng_trace_chunk_get(chunk); | |
499 | assert(acquired_reference); | |
500 | stream->trace_chunk = chunk; | |
c35f9726 JG |
501 | |
502 | if (stream->stream_fd) { | |
503 | stream_fd_put(stream->stream_fd); | |
504 | stream->stream_fd = NULL; | |
505 | } | |
506 | ret = stream_create_data_output_file_from_trace_chunk(stream, chunk, | |
507 | false, &new_stream_fd); | |
508 | stream->stream_fd = new_stream_fd; | |
348a81dc | 509 | end: |
348a81dc JG |
510 | return ret; |
511 | } | |
512 | ||
2a174661 | 513 | /* |
7591bab1 | 514 | * We keep ownership of path_name and channel_name. |
2a174661 | 515 | */ |
7591bab1 MD |
516 | struct relay_stream *stream_create(struct ctf_trace *trace, |
517 | uint64_t stream_handle, char *path_name, | |
518 | char *channel_name, uint64_t tracefile_size, | |
348a81dc | 519 | uint64_t tracefile_count) |
2a174661 | 520 | { |
7591bab1 MD |
521 | int ret; |
522 | struct relay_stream *stream = NULL; | |
523 | struct relay_session *session = trace->session; | |
348a81dc JG |
524 | bool acquired_reference = false; |
525 | struct lttng_trace_chunk *current_trace_chunk; | |
2a174661 | 526 | |
7591bab1 MD |
527 | stream = zmalloc(sizeof(struct relay_stream)); |
528 | if (stream == NULL) { | |
529 | PERROR("relay stream zmalloc"); | |
7591bab1 MD |
530 | goto error_no_alloc; |
531 | } | |
2a174661 | 532 | |
7591bab1 | 533 | stream->stream_handle = stream_handle; |
a8f9f353 | 534 | stream->prev_data_seq = -1ULL; |
7a45c7e6 | 535 | stream->prev_index_seq = -1ULL; |
bda7c7b9 | 536 | stream->last_net_seq_num = -1ULL; |
7591bab1 MD |
537 | stream->ctf_stream_id = -1ULL; |
538 | stream->tracefile_size = tracefile_size; | |
539 | stream->tracefile_count = tracefile_count; | |
540 | stream->path_name = path_name; | |
541 | stream->channel_name = channel_name; | |
2f9c3030 | 542 | stream->beacon_ts_end = -1ULL; |
7591bab1 MD |
543 | lttng_ht_node_init_u64(&stream->node, stream->stream_handle); |
544 | pthread_mutex_init(&stream->lock, NULL); | |
7591bab1 MD |
545 | urcu_ref_init(&stream->ref); |
546 | ctf_trace_get(trace); | |
547 | stream->trace = trace; | |
2a174661 | 548 | |
348a81dc JG |
549 | pthread_mutex_lock(&trace->session->lock); |
550 | current_trace_chunk = trace->session->current_trace_chunk; | |
551 | if (current_trace_chunk) { | |
552 | acquired_reference = lttng_trace_chunk_get(current_trace_chunk); | |
553 | } | |
554 | pthread_mutex_unlock(&trace->session->lock); | |
555 | if (!acquired_reference) { | |
556 | ERR("Cannot create stream for channel \"%s\" as a reference to the session's current trace chunk could not be acquired", | |
557 | channel_name); | |
7591bab1 MD |
558 | ret = -1; |
559 | goto end; | |
2a174661 DG |
560 | } |
561 | ||
348a81dc JG |
562 | stream->indexes_ht = lttng_ht_new(0, LTTNG_HT_TYPE_U64); |
563 | if (!stream->indexes_ht) { | |
564 | ERR("Cannot created indexes_ht"); | |
565 | ret = -1; | |
7591bab1 MD |
566 | goto end; |
567 | } | |
2a174661 | 568 | |
c35f9726 | 569 | pthread_mutex_lock(&stream->lock); |
348a81dc | 570 | ret = stream_set_trace_chunk(stream, current_trace_chunk); |
c35f9726 | 571 | pthread_mutex_unlock(&stream->lock); |
348a81dc JG |
572 | if (ret) { |
573 | ERR("Failed to set the current trace chunk of session \"%s\" on newly created stream of channel \"%s\"", | |
574 | trace->session->session_name, | |
575 | stream->channel_name); | |
7591bab1 MD |
576 | ret = -1; |
577 | goto end; | |
2a174661 | 578 | } |
a44ca2ca MD |
579 | stream->tfa = tracefile_array_create(stream->tracefile_count); |
580 | if (!stream->tfa) { | |
581 | ret = -1; | |
582 | goto end; | |
583 | } | |
7591bab1 | 584 | |
348a81dc JG |
585 | stream->is_metadata = !strcmp(stream->channel_name, |
586 | DEFAULT_METADATA_NAME); | |
7591bab1 MD |
587 | stream->in_recv_list = true; |
588 | ||
589 | /* | |
590 | * Add the stream in the recv list of the session. Once the end stream | |
591 | * message is received, all session streams are published. | |
592 | */ | |
593 | pthread_mutex_lock(&session->recv_list_lock); | |
594 | cds_list_add_rcu(&stream->recv_node, &session->recv_list); | |
595 | session->stream_count++; | |
596 | pthread_mutex_unlock(&session->recv_list_lock); | |
597 | ||
598 | /* | |
599 | * Both in the ctf_trace object and the global stream ht since the data | |
600 | * side of the relayd does not have the concept of session. | |
601 | */ | |
602 | lttng_ht_add_unique_u64(relay_streams_ht, &stream->node); | |
77f7bd85 | 603 | stream->in_stream_ht = true; |
2a174661 | 604 | |
7591bab1 MD |
605 | DBG("Relay new stream added %s with ID %" PRIu64, stream->channel_name, |
606 | stream->stream_handle); | |
607 | ret = 0; | |
608 | ||
609 | end: | |
610 | if (ret) { | |
611 | if (stream->stream_fd) { | |
612 | stream_fd_put(stream->stream_fd); | |
613 | stream->stream_fd = NULL; | |
2a174661 | 614 | } |
7591bab1 MD |
615 | stream_put(stream); |
616 | stream = NULL; | |
2a174661 | 617 | } |
348a81dc | 618 | lttng_trace_chunk_put(current_trace_chunk); |
7591bab1 | 619 | return stream; |
2a174661 | 620 | |
7591bab1 MD |
621 | error_no_alloc: |
622 | /* | |
623 | * path_name and channel_name need to be freed explicitly here | |
624 | * because we cannot rely on stream_put(). | |
625 | */ | |
626 | free(path_name); | |
627 | free(channel_name); | |
628 | return NULL; | |
629 | } | |
630 | ||
631 | /* | |
632 | * Called with the session lock held. | |
633 | */ | |
634 | void stream_publish(struct relay_stream *stream) | |
635 | { | |
636 | struct relay_session *session; | |
637 | ||
638 | pthread_mutex_lock(&stream->lock); | |
639 | if (stream->published) { | |
640 | goto unlock; | |
2a174661 DG |
641 | } |
642 | ||
7591bab1 | 643 | session = stream->trace->session; |
2a174661 | 644 | |
7591bab1 MD |
645 | pthread_mutex_lock(&session->recv_list_lock); |
646 | if (stream->in_recv_list) { | |
647 | cds_list_del_rcu(&stream->recv_node); | |
648 | stream->in_recv_list = false; | |
649 | } | |
650 | pthread_mutex_unlock(&session->recv_list_lock); | |
2a174661 | 651 | |
7591bab1 MD |
652 | pthread_mutex_lock(&stream->trace->stream_list_lock); |
653 | cds_list_add_rcu(&stream->stream_node, &stream->trace->stream_list); | |
654 | pthread_mutex_unlock(&stream->trace->stream_list_lock); | |
2a174661 | 655 | |
7591bab1 MD |
656 | stream->published = true; |
657 | unlock: | |
2a174661 | 658 | pthread_mutex_unlock(&stream->lock); |
2a174661 DG |
659 | } |
660 | ||
7591bab1 | 661 | /* |
77f7bd85 | 662 | * Stream must be protected by holding the stream lock or by virtue of being |
ce4d4083 | 663 | * called from stream_destroy. |
7591bab1 MD |
664 | */ |
665 | static void stream_unpublish(struct relay_stream *stream) | |
2a174661 | 666 | { |
77f7bd85 MD |
667 | if (stream->in_stream_ht) { |
668 | struct lttng_ht_iter iter; | |
669 | int ret; | |
670 | ||
671 | iter.iter.node = &stream->node.node; | |
672 | ret = lttng_ht_del(relay_streams_ht, &iter); | |
673 | assert(!ret); | |
674 | stream->in_stream_ht = false; | |
675 | } | |
676 | if (stream->published) { | |
677 | pthread_mutex_lock(&stream->trace->stream_list_lock); | |
678 | cds_list_del_rcu(&stream->stream_node); | |
679 | pthread_mutex_unlock(&stream->trace->stream_list_lock); | |
680 | stream->published = false; | |
7591bab1 | 681 | } |
7591bab1 MD |
682 | } |
683 | ||
684 | static void stream_destroy(struct relay_stream *stream) | |
685 | { | |
686 | if (stream->indexes_ht) { | |
49e614cb MD |
687 | /* |
688 | * Calling lttng_ht_destroy in call_rcu worker thread so | |
689 | * we don't hold the RCU read-side lock while calling | |
690 | * it. | |
691 | */ | |
7591bab1 MD |
692 | lttng_ht_destroy(stream->indexes_ht); |
693 | } | |
a44ca2ca MD |
694 | if (stream->tfa) { |
695 | tracefile_array_destroy(stream->tfa); | |
696 | } | |
7591bab1 MD |
697 | free(stream->path_name); |
698 | free(stream->channel_name); | |
699 | free(stream); | |
700 | } | |
701 | ||
702 | static void stream_destroy_rcu(struct rcu_head *rcu_head) | |
703 | { | |
704 | struct relay_stream *stream = | |
705 | caa_container_of(rcu_head, struct relay_stream, rcu_node); | |
706 | ||
707 | stream_destroy(stream); | |
708 | } | |
709 | ||
710 | /* | |
711 | * No need to take stream->lock since this is only called on the final | |
712 | * stream_put which ensures that a single thread may act on the stream. | |
7591bab1 MD |
713 | */ |
714 | static void stream_release(struct urcu_ref *ref) | |
715 | { | |
716 | struct relay_stream *stream = | |
717 | caa_container_of(ref, struct relay_stream, ref); | |
718 | struct relay_session *session; | |
2a174661 | 719 | |
7591bab1 MD |
720 | session = stream->trace->session; |
721 | ||
722 | DBG("Releasing stream id %" PRIu64, stream->stream_handle); | |
723 | ||
724 | pthread_mutex_lock(&session->recv_list_lock); | |
725 | session->stream_count--; | |
726 | if (stream->in_recv_list) { | |
727 | cds_list_del_rcu(&stream->recv_node); | |
728 | stream->in_recv_list = false; | |
729 | } | |
730 | pthread_mutex_unlock(&session->recv_list_lock); | |
2a174661 | 731 | |
7591bab1 MD |
732 | stream_unpublish(stream); |
733 | ||
734 | if (stream->stream_fd) { | |
735 | stream_fd_put(stream->stream_fd); | |
736 | stream->stream_fd = NULL; | |
737 | } | |
f8f3885c MD |
738 | if (stream->index_file) { |
739 | lttng_index_file_put(stream->index_file); | |
740 | stream->index_file = NULL; | |
7591bab1 MD |
741 | } |
742 | if (stream->trace) { | |
743 | ctf_trace_put(stream->trace); | |
744 | stream->trace = NULL; | |
745 | } | |
c35f9726 | 746 | stream_complete_rotation(stream); |
348a81dc JG |
747 | lttng_trace_chunk_put(stream->trace_chunk); |
748 | stream->trace_chunk = NULL; | |
7591bab1 MD |
749 | |
750 | call_rcu(&stream->rcu_node, stream_destroy_rcu); | |
2a174661 DG |
751 | } |
752 | ||
7591bab1 | 753 | void stream_put(struct relay_stream *stream) |
2a174661 | 754 | { |
7591bab1 | 755 | rcu_read_lock(); |
7591bab1 MD |
756 | assert(stream->ref.refcount != 0); |
757 | /* | |
758 | * Wait until we have processed all the stream packets before | |
759 | * actually putting our last stream reference. | |
760 | */ | |
7591bab1 | 761 | urcu_ref_put(&stream->ref, stream_release); |
7591bab1 MD |
762 | rcu_read_unlock(); |
763 | } | |
764 | ||
c35f9726 JG |
765 | int stream_set_pending_rotation(struct relay_stream *stream, |
766 | struct lttng_trace_chunk *next_trace_chunk, | |
767 | uint64_t rotation_sequence_number) | |
768 | { | |
769 | int ret = 0; | |
770 | const struct relay_stream_rotation rotation = { | |
771 | .seq_num = rotation_sequence_number, | |
772 | .next_trace_chunk = next_trace_chunk, | |
773 | }; | |
774 | ||
775 | if (stream->ongoing_rotation.is_set) { | |
776 | ERR("Attempted to set a pending rotation on a stream already being rotated (protocol error)"); | |
777 | ret = -1; | |
778 | goto end; | |
779 | } | |
780 | ||
781 | if (next_trace_chunk) { | |
782 | const bool reference_acquired = | |
783 | lttng_trace_chunk_get(next_trace_chunk); | |
784 | ||
785 | assert(reference_acquired); | |
786 | } | |
787 | LTTNG_OPTIONAL_SET(&stream->ongoing_rotation, rotation); | |
788 | ||
789 | DBG("Setting pending rotation: stream_id = %" PRIu64 ", rotation_seq_num = %" PRIu64, | |
790 | stream->stream_handle, rotation_sequence_number); | |
791 | if (stream->is_metadata) { | |
792 | /* | |
793 | * A metadata stream has no index; consider it already rotated. | |
794 | */ | |
795 | stream->ongoing_rotation.value.index_rotated = true; | |
796 | ret = stream_rotate_data_file(stream); | |
797 | } else { | |
798 | ret = try_rotate_stream_data(stream); | |
799 | if (ret < 0) { | |
800 | goto end; | |
801 | } | |
802 | ||
803 | ret = try_rotate_stream_index(stream); | |
804 | if (ret < 0) { | |
805 | goto end; | |
806 | } | |
807 | } | |
808 | end: | |
809 | return ret; | |
810 | } | |
811 | ||
bda7c7b9 | 812 | void try_stream_close(struct relay_stream *stream) |
7591bab1 | 813 | { |
98ba050e JR |
814 | bool session_aborted; |
815 | struct relay_session *session = stream->trace->session; | |
816 | ||
bda7c7b9 | 817 | DBG("Trying to close stream %" PRIu64, stream->stream_handle); |
98ba050e JR |
818 | |
819 | pthread_mutex_lock(&session->lock); | |
820 | session_aborted = session->aborted; | |
821 | pthread_mutex_unlock(&session->lock); | |
822 | ||
7591bab1 | 823 | pthread_mutex_lock(&stream->lock); |
bda7c7b9 JG |
824 | /* |
825 | * Can be called concurently by connection close and reception of last | |
826 | * pending data. | |
827 | */ | |
828 | if (stream->closed) { | |
829 | pthread_mutex_unlock(&stream->lock); | |
830 | DBG("closing stream %" PRIu64 " aborted since it is already marked as closed", stream->stream_handle); | |
831 | return; | |
832 | } | |
833 | ||
834 | stream->close_requested = true; | |
3d07a857 MD |
835 | |
836 | if (stream->last_net_seq_num == -1ULL) { | |
837 | /* | |
838 | * Handle connection close without explicit stream close | |
839 | * command. | |
840 | * | |
841 | * We can be clever about indexes partially received in | |
842 | * cases where we received the data socket part, but not | |
843 | * the control socket part: since we're currently closing | |
844 | * the stream on behalf of the control socket, we *know* | |
845 | * there won't be any more control information for this | |
846 | * socket. Therefore, we can destroy all indexes for | |
847 | * which we have received only the file descriptor (from | |
848 | * data socket). This takes care of consumerd crashes | |
849 | * between sending the data and control information for | |
850 | * a packet. Since those are sent in that order, we take | |
851 | * care of consumerd crashes. | |
852 | */ | |
5312a3ed | 853 | DBG("relay_index_close_partial_fd"); |
3d07a857 MD |
854 | relay_index_close_partial_fd(stream); |
855 | /* | |
856 | * Use the highest net_seq_num we currently have pending | |
857 | * As end of stream indicator. Leave last_net_seq_num | |
858 | * at -1ULL if we cannot find any index. | |
859 | */ | |
860 | stream->last_net_seq_num = relay_index_find_last(stream); | |
5312a3ed | 861 | DBG("Updating stream->last_net_seq_num to %" PRIu64, stream->last_net_seq_num); |
3d07a857 MD |
862 | /* Fall-through into the next check. */ |
863 | } | |
864 | ||
bda7c7b9 | 865 | if (stream->last_net_seq_num != -1ULL && |
a8f9f353 | 866 | ((int64_t) (stream->prev_data_seq - stream->last_net_seq_num)) < 0 |
98ba050e | 867 | && !session_aborted) { |
3d07a857 MD |
868 | /* |
869 | * Don't close since we still have data pending. This | |
870 | * handles cases where an explicit close command has | |
871 | * been received for this stream, and cases where the | |
872 | * connection has been closed, and we are awaiting for | |
873 | * index information from the data socket. It is | |
874 | * therefore expected that all the index fd information | |
875 | * we need has already been received on the control | |
876 | * socket. Matching index information from data socket | |
877 | * should be Expected Soon(TM). | |
878 | * | |
879 | * TODO: We should implement a timer to garbage collect | |
880 | * streams after a timeout to be resilient against a | |
881 | * consumerd implementation that would not match this | |
882 | * expected behavior. | |
883 | */ | |
bda7c7b9 JG |
884 | pthread_mutex_unlock(&stream->lock); |
885 | DBG("closing stream %" PRIu64 " aborted since it still has data pending", stream->stream_handle); | |
886 | return; | |
887 | } | |
3d07a857 MD |
888 | /* |
889 | * We received all the indexes we can expect. | |
890 | */ | |
77f7bd85 | 891 | stream_unpublish(stream); |
2229a09c | 892 | stream->closed = true; |
bda7c7b9 | 893 | /* Relay indexes are only used by the "consumer/sessiond" end. */ |
7591bab1 MD |
894 | relay_index_close_all(stream); |
895 | pthread_mutex_unlock(&stream->lock); | |
bda7c7b9 | 896 | DBG("Succeeded in closing stream %" PRIu64, stream->stream_handle); |
7591bab1 MD |
897 | stream_put(stream); |
898 | } | |
899 | ||
c35f9726 JG |
900 | int stream_init_packet(struct relay_stream *stream, size_t packet_size, |
901 | bool *file_rotated) | |
902 | { | |
903 | int ret = 0; | |
904 | ||
905 | ASSERT_LOCKED(stream->lock); | |
906 | if (caa_likely(stream->tracefile_size == 0)) { | |
907 | /* No size limit set; nothing to check. */ | |
908 | goto end; | |
909 | } | |
910 | ||
911 | /* | |
912 | * Check if writing the new packet would exceed the maximal file size. | |
913 | */ | |
914 | if (caa_unlikely((stream->tracefile_size_current + packet_size) > | |
915 | stream->tracefile_size)) { | |
916 | const uint64_t new_file_index = | |
917 | (stream->tracefile_current_index + 1) % | |
918 | stream->tracefile_count; | |
919 | ||
920 | if (new_file_index < stream->tracefile_current_index) { | |
921 | stream->tracefile_wrapped_around = true; | |
922 | } | |
923 | DBG("New stream packet causes stream file rotation: stream_id = %" PRIu64 | |
924 | ", current_file_size = %" PRIu64 | |
76ee9245 | 925 | ", packet_size = %zu, current_file_index = %" PRIu64 |
c35f9726 JG |
926 | " new_file_index = %" PRIu64, |
927 | stream->stream_handle, | |
928 | stream->tracefile_size_current, packet_size, | |
929 | stream->tracefile_current_index, new_file_index); | |
930 | tracefile_array_file_rotate(stream->tfa); | |
931 | stream->tracefile_current_index = new_file_index; | |
932 | ||
933 | if (stream->stream_fd) { | |
934 | stream_fd_put(stream->stream_fd); | |
935 | stream->stream_fd = NULL; | |
936 | } | |
937 | ret = stream_create_data_output_file_from_trace_chunk(stream, | |
938 | stream->trace_chunk, false, &stream->stream_fd); | |
939 | if (ret) { | |
940 | ERR("Failed to perform trace file rotation of stream %" PRIu64, | |
941 | stream->stream_handle); | |
942 | goto end; | |
943 | } | |
944 | ||
945 | /* | |
946 | * Reset current size because we just performed a stream | |
947 | * rotation. | |
948 | */ | |
949 | stream->tracefile_size_current = 0; | |
950 | *file_rotated = true; | |
951 | } else { | |
952 | *file_rotated = false; | |
953 | } | |
954 | end: | |
955 | return ret; | |
956 | } | |
957 | ||
958 | /* Note that the packet is not necessarily complete. */ | |
959 | int stream_write(struct relay_stream *stream, | |
960 | const struct lttng_buffer_view *packet, size_t padding_len) | |
961 | { | |
962 | int ret = 0; | |
963 | ssize_t write_ret; | |
964 | size_t padding_to_write = padding_len; | |
965 | char padding_buffer[FILE_IO_STACK_BUFFER_SIZE]; | |
966 | ||
967 | ASSERT_LOCKED(stream->lock); | |
968 | memset(padding_buffer, 0, | |
969 | min(sizeof(padding_buffer), padding_to_write)); | |
970 | ||
971 | if (packet) { | |
972 | write_ret = lttng_write(stream->stream_fd->fd, | |
973 | packet->data, packet->size); | |
974 | if (write_ret != packet->size) { | |
975 | PERROR("Failed to write to stream file of %sstream %" PRIu64, | |
976 | stream->is_metadata ? "metadata " : "", | |
977 | stream->stream_handle); | |
978 | ret = -1; | |
979 | goto end; | |
980 | } | |
981 | } | |
982 | ||
983 | while (padding_to_write > 0) { | |
984 | const size_t padding_to_write_this_pass = | |
985 | min(padding_to_write, sizeof(padding_buffer)); | |
986 | ||
987 | write_ret = lttng_write(stream->stream_fd->fd, | |
988 | padding_buffer, padding_to_write_this_pass); | |
989 | if (write_ret != padding_to_write_this_pass) { | |
990 | PERROR("Failed to write padding to file of %sstream %" PRIu64, | |
991 | stream->is_metadata ? "metadata " : "", | |
992 | stream->stream_handle); | |
993 | ret = -1; | |
994 | goto end; | |
995 | } | |
996 | padding_to_write -= padding_to_write_this_pass; | |
997 | } | |
998 | ||
999 | if (stream->is_metadata) { | |
1000 | stream->metadata_received += packet->size + padding_len; | |
1001 | } | |
1002 | ||
8c865d87 | 1003 | DBG("Wrote to %sstream %" PRIu64 ": data_length = %zu, padding_length = %zu", |
c35f9726 JG |
1004 | stream->is_metadata ? "metadata " : "", |
1005 | stream->stream_handle, | |
8c865d87 | 1006 | packet ? packet->size : (size_t) 0, padding_len); |
c35f9726 JG |
1007 | end: |
1008 | return ret; | |
1009 | } | |
1010 | ||
1011 | /* | |
1012 | * Update index after receiving a packet for a data stream. | |
1013 | * | |
1014 | * Called with the stream lock held. | |
1015 | * | |
1016 | * Return 0 on success else a negative value. | |
1017 | */ | |
1018 | int stream_update_index(struct relay_stream *stream, uint64_t net_seq_num, | |
1019 | bool rotate_index, bool *flushed, uint64_t total_size) | |
1020 | { | |
1021 | int ret = 0; | |
1022 | uint64_t data_offset; | |
1023 | struct relay_index *index; | |
1024 | ||
1025 | ASSERT_LOCKED(stream->lock); | |
1026 | /* Get data offset because we are about to update the index. */ | |
1027 | data_offset = htobe64(stream->tracefile_size_current); | |
1028 | ||
1029 | DBG("handle_index_data: stream %" PRIu64 " net_seq_num %" PRIu64 " data offset %" PRIu64, | |
1030 | stream->stream_handle, net_seq_num, stream->tracefile_size_current); | |
1031 | ||
1032 | /* | |
1033 | * Lookup for an existing index for that stream id/sequence | |
1034 | * number. If it exists, the control thread has already received the | |
1035 | * data for it, thus we need to write it to disk. | |
1036 | */ | |
1037 | index = relay_index_get_by_id_or_create(stream, net_seq_num); | |
1038 | if (!index) { | |
1039 | ret = -1; | |
1040 | goto end; | |
1041 | } | |
1042 | ||
1043 | if (rotate_index || !stream->index_file) { | |
1044 | ret = create_index_file(stream, stream->trace_chunk); | |
1045 | if (ret) { | |
1046 | ERR("Failed to create index file for stream %" PRIu64, | |
1047 | stream->stream_handle); | |
1048 | /* Put self-ref for this index due to error. */ | |
1049 | relay_index_put(index); | |
1050 | index = NULL; | |
1051 | goto end; | |
1052 | } | |
1053 | } | |
1054 | ||
1055 | if (relay_index_set_file(index, stream->index_file, data_offset)) { | |
1056 | ret = -1; | |
1057 | /* Put self-ref for this index due to error. */ | |
1058 | relay_index_put(index); | |
1059 | index = NULL; | |
1060 | goto end; | |
1061 | } | |
1062 | ||
1063 | ret = relay_index_try_flush(index); | |
1064 | if (ret == 0) { | |
1065 | tracefile_array_commit_seq(stream->tfa); | |
1066 | stream->index_received_seqcount++; | |
1067 | *flushed = true; | |
1068 | } else if (ret > 0) { | |
1069 | index->total_size = total_size; | |
1070 | /* No flush. */ | |
1071 | ret = 0; | |
1072 | } else { | |
1073 | /* | |
1074 | * ret < 0 | |
1075 | * | |
1076 | * relay_index_try_flush is responsible for the self-reference | |
1077 | * put of the index object on error. | |
1078 | */ | |
1079 | ERR("relay_index_try_flush error %d", ret); | |
1080 | ret = -1; | |
1081 | } | |
1082 | end: | |
1083 | return ret; | |
1084 | } | |
1085 | ||
1086 | int stream_complete_packet(struct relay_stream *stream, size_t packet_total_size, | |
1087 | uint64_t sequence_number, bool index_flushed) | |
1088 | { | |
1089 | int ret = 0; | |
1090 | ||
1091 | ASSERT_LOCKED(stream->lock); | |
1092 | ||
1093 | stream->tracefile_size_current += packet_total_size; | |
1094 | if (index_flushed) { | |
1095 | stream->pos_after_last_complete_data_index = | |
1096 | stream->tracefile_size_current; | |
1097 | stream->prev_index_seq = sequence_number; | |
1098 | ret = try_rotate_stream_index(stream); | |
1099 | if (ret < 0) { | |
1100 | goto end; | |
1101 | } | |
1102 | } | |
1103 | ||
1104 | stream->prev_data_seq = sequence_number; | |
1105 | ret = try_rotate_stream_data(stream); | |
1106 | if (ret < 0) { | |
1107 | goto end; | |
1108 | } | |
1109 | end: | |
1110 | return ret; | |
1111 | } | |
1112 | ||
1113 | int stream_add_index(struct relay_stream *stream, | |
1114 | const struct lttcomm_relayd_index *index_info) | |
1115 | { | |
1116 | int ret = 0; | |
1117 | struct relay_index *index; | |
1118 | ||
1119 | ASSERT_LOCKED(stream->lock); | |
1120 | ||
1121 | /* Live beacon handling */ | |
1122 | if (index_info->packet_size == 0) { | |
1123 | DBG("Received live beacon for stream %" PRIu64, | |
1124 | stream->stream_handle); | |
1125 | ||
1126 | /* | |
1127 | * Only flag a stream inactive when it has already | |
1128 | * received data and no indexes are in flight. | |
1129 | */ | |
1130 | if (stream->index_received_seqcount > 0 | |
1131 | && stream->indexes_in_flight == 0) { | |
1132 | stream->beacon_ts_end = index_info->timestamp_end; | |
1133 | } | |
1134 | ret = 0; | |
1135 | goto end; | |
1136 | } else { | |
1137 | stream->beacon_ts_end = -1ULL; | |
1138 | } | |
1139 | ||
1140 | if (stream->ctf_stream_id == -1ULL) { | |
1141 | stream->ctf_stream_id = index_info->stream_id; | |
1142 | } | |
1143 | ||
1144 | index = relay_index_get_by_id_or_create(stream, index_info->net_seq_num); | |
1145 | if (!index) { | |
1146 | ret = -1; | |
1147 | ERR("Failed to get or create index %" PRIu64, | |
1148 | index_info->net_seq_num); | |
1149 | goto end; | |
1150 | } | |
1151 | if (relay_index_set_control_data(index, index_info, | |
1152 | stream->trace->session->minor)) { | |
1153 | ERR("set_index_control_data error"); | |
1154 | relay_index_put(index); | |
1155 | ret = -1; | |
1156 | goto end; | |
1157 | } | |
1158 | ret = relay_index_try_flush(index); | |
1159 | if (ret == 0) { | |
1160 | tracefile_array_commit_seq(stream->tfa); | |
1161 | stream->index_received_seqcount++; | |
1162 | stream->pos_after_last_complete_data_index += index->total_size; | |
1163 | stream->prev_index_seq = index_info->net_seq_num; | |
1164 | ||
1165 | ret = try_rotate_stream_index(stream); | |
1166 | if (ret < 0) { | |
1167 | goto end; | |
1168 | } | |
1169 | } else if (ret > 0) { | |
1170 | /* no flush. */ | |
1171 | ret = 0; | |
1172 | } else { | |
1173 | /* | |
1174 | * ret < 0 | |
1175 | * | |
1176 | * relay_index_try_flush is responsible for the self-reference | |
1177 | * put of the index object on error. | |
1178 | */ | |
1179 | ERR("relay_index_try_flush error %d", ret); | |
1180 | ret = -1; | |
1181 | } | |
1182 | end: | |
1183 | return ret; | |
1184 | } | |
1185 | ||
da412cde MD |
1186 | static void print_stream_indexes(struct relay_stream *stream) |
1187 | { | |
1188 | struct lttng_ht_iter iter; | |
1189 | struct relay_index *index; | |
1190 | ||
1191 | rcu_read_lock(); | |
1192 | cds_lfht_for_each_entry(stream->indexes_ht->ht, &iter.iter, index, | |
1193 | index_n.node) { | |
1194 | DBG("index %p net_seq_num %" PRIu64 " refcount %ld" | |
1195 | " stream %" PRIu64 " trace %" PRIu64 | |
1196 | " session %" PRIu64, | |
1197 | index, | |
1198 | index->index_n.key, | |
1199 | stream->ref.refcount, | |
1200 | index->stream->stream_handle, | |
1201 | index->stream->trace->id, | |
1202 | index->stream->trace->session->id); | |
1203 | } | |
1204 | rcu_read_unlock(); | |
1205 | } | |
1206 | ||
c35f9726 JG |
1207 | int stream_reset_file(struct relay_stream *stream) |
1208 | { | |
1209 | ASSERT_LOCKED(stream->lock); | |
1210 | ||
1211 | if (stream->stream_fd) { | |
1212 | stream_fd_put(stream->stream_fd); | |
1213 | stream->stream_fd = NULL; | |
1214 | } | |
1215 | ||
1216 | stream->tracefile_size_current = 0; | |
1217 | stream->prev_data_seq = 0; | |
1218 | stream->prev_index_seq = 0; | |
1219 | /* Note that this does not reset the tracefile array. */ | |
1220 | stream->tracefile_current_index = 0; | |
1221 | stream->pos_after_last_complete_data_index = 0; | |
1222 | ||
1223 | return stream_create_data_output_file_from_trace_chunk(stream, | |
1224 | stream->trace_chunk, true, &stream->stream_fd); | |
1225 | } | |
1226 | ||
7591bab1 MD |
1227 | void print_relay_streams(void) |
1228 | { | |
1229 | struct lttng_ht_iter iter; | |
1230 | struct relay_stream *stream; | |
1231 | ||
ce3f3ba3 JG |
1232 | if (!relay_streams_ht) { |
1233 | return; | |
1234 | } | |
1235 | ||
7591bab1 MD |
1236 | rcu_read_lock(); |
1237 | cds_lfht_for_each_entry(relay_streams_ht->ht, &iter.iter, stream, | |
1238 | node.node) { | |
1239 | if (!stream_get(stream)) { | |
1240 | continue; | |
1241 | } | |
1242 | DBG("stream %p refcount %ld stream %" PRIu64 " trace %" PRIu64 | |
1243 | " session %" PRIu64, | |
1244 | stream, | |
1245 | stream->ref.refcount, | |
1246 | stream->stream_handle, | |
1247 | stream->trace->id, | |
1248 | stream->trace->session->id); | |
da412cde | 1249 | print_stream_indexes(stream); |
7591bab1 MD |
1250 | stream_put(stream); |
1251 | } | |
1252 | rcu_read_unlock(); | |
2a174661 | 1253 | } |