Commit | Line | Data |
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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 | ||
c35f9726 JG |
80 | static int stream_create_data_output_file_from_trace_chunk( |
81 | struct relay_stream *stream, | |
82 | struct lttng_trace_chunk *trace_chunk, | |
83 | bool force_unlink, | |
84 | struct stream_fd **out_stream_fd) | |
348a81dc JG |
85 | { |
86 | int ret, fd; | |
c35f9726 | 87 | char stream_path[LTTNG_PATH_MAX]; |
348a81dc JG |
88 | enum lttng_trace_chunk_status status; |
89 | const int flags = O_RDWR | O_CREAT | O_TRUNC; | |
90 | const mode_t mode = S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP; | |
348a81dc JG |
91 | |
92 | ASSERT_LOCKED(stream->lock); | |
348a81dc | 93 | |
348a81dc | 94 | ret = utils_stream_file_path(stream->path_name, stream->channel_name, |
c35f9726 JG |
95 | stream->tracefile_size, stream->tracefile_current_index, |
96 | NULL, stream_path, sizeof(stream_path)); | |
348a81dc JG |
97 | if (ret < 0) { |
98 | goto end; | |
99 | } | |
100 | ||
c35f9726 JG |
101 | if (stream->tracefile_wrapped_around || force_unlink) { |
102 | /* | |
103 | * The on-disk ring-buffer has wrapped around. | |
104 | * Newly created stream files will replace existing files. Since | |
105 | * live clients may be consuming existing files, the file about | |
106 | * to be replaced is unlinked in order to not overwrite its | |
107 | * content. | |
108 | */ | |
109 | status = lttng_trace_chunk_unlink_file(trace_chunk, | |
110 | stream_path); | |
111 | if (status != LTTNG_TRACE_CHUNK_STATUS_OK) { | |
112 | PERROR("Failed to unlink stream file \"%s\" during trace file rotation", | |
113 | stream_path); | |
114 | /* | |
115 | * Don't abort if the file doesn't exist, it is | |
116 | * unexpected, but should not be a fatal error. | |
117 | */ | |
118 | if (errno != ENOENT) { | |
119 | ret = -1; | |
120 | goto end; | |
121 | } | |
122 | } | |
123 | } | |
124 | ||
348a81dc | 125 | status = lttng_trace_chunk_open_file( |
c35f9726 | 126 | trace_chunk, stream_path, flags, mode, &fd); |
348a81dc JG |
127 | if (status != LTTNG_TRACE_CHUNK_STATUS_OK) { |
128 | ERR("Failed to open stream file \"%s\"", stream->channel_name); | |
129 | ret = -1; | |
130 | goto end; | |
131 | } | |
132 | ||
c35f9726 JG |
133 | *out_stream_fd = stream_fd_create(fd); |
134 | if (!*out_stream_fd) { | |
348a81dc JG |
135 | if (close(ret)) { |
136 | PERROR("Error closing stream file descriptor %d", ret); | |
137 | } | |
138 | ret = -1; | |
139 | goto end; | |
140 | } | |
141 | end: | |
142 | return ret; | |
143 | } | |
144 | ||
c35f9726 JG |
145 | static int stream_rotate_data_file(struct relay_stream *stream) |
146 | { | |
147 | int ret = 0; | |
148 | ||
149 | DBG("Rotating stream %" PRIu64 " data file", | |
150 | stream->stream_handle); | |
151 | ||
152 | if (stream->stream_fd) { | |
153 | stream_fd_put(stream->stream_fd); | |
154 | stream->stream_fd = NULL; | |
155 | } | |
156 | ||
157 | stream->tracefile_wrapped_around = false; | |
158 | stream->tracefile_current_index = 0; | |
159 | ||
160 | if (stream->ongoing_rotation.value.next_trace_chunk) { | |
161 | struct stream_fd *new_stream_fd = NULL; | |
162 | enum lttng_trace_chunk_status chunk_status; | |
163 | ||
164 | chunk_status = lttng_trace_chunk_create_subdirectory( | |
165 | stream->ongoing_rotation.value.next_trace_chunk, | |
166 | stream->path_name); | |
167 | if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) { | |
168 | ret = -1; | |
169 | goto end; | |
170 | } | |
171 | ||
172 | /* Rotate the data file. */ | |
173 | ret = stream_create_data_output_file_from_trace_chunk(stream, | |
174 | stream->ongoing_rotation.value.next_trace_chunk, | |
175 | false, &new_stream_fd); | |
176 | stream->stream_fd = new_stream_fd; | |
177 | if (ret < 0) { | |
178 | ERR("Failed to rotate stream data file"); | |
179 | goto end; | |
180 | } | |
181 | } | |
182 | stream->tracefile_size_current = 0; | |
183 | stream->pos_after_last_complete_data_index = 0; | |
184 | stream->ongoing_rotation.value.data_rotated = true; | |
185 | ||
186 | if (stream->ongoing_rotation.value.index_rotated) { | |
187 | /* Rotation completed; reset its state. */ | |
188 | stream_complete_rotation(stream); | |
189 | } | |
190 | end: | |
191 | return ret; | |
192 | } | |
193 | ||
f2aea36d JG |
194 | /* |
195 | * If too much data has been written in a tracefile before we received the | |
196 | * rotation command, we have to move the excess data to the new tracefile and | |
197 | * perform the rotation. This can happen because the control and data | |
198 | * connections are separate, the indexes as well as the commands arrive from | |
199 | * the control connection and we have no control over the order so we could be | |
200 | * in a situation where too much data has been received on the data connection | |
201 | * before the rotation command on the control connection arrives. | |
202 | */ | |
203 | static int rotate_truncate_stream(struct relay_stream *stream) | |
204 | { | |
205 | int ret; | |
206 | off_t lseek_ret, previous_stream_copy_origin; | |
207 | uint64_t copy_bytes_left, misplaced_data_size; | |
208 | bool acquired_reference; | |
209 | struct stream_fd *previous_stream_fd = NULL; | |
210 | struct lttng_trace_chunk *previous_chunk = NULL; | |
211 | ||
4147107d JG |
212 | if (!LTTNG_OPTIONAL_GET(&stream->ongoing_rotation)->next_trace_chunk) { |
213 | ERR("Protocol error encoutered in %s(): stream rotation " | |
214 | "sequence number is before the current sequence number " | |
215 | "and the next trace chunk is unset. Honoring this " | |
216 | "rotation command would result in data loss", | |
217 | __FUNCTION__); | |
218 | ret = -1; | |
219 | goto end; | |
220 | } | |
221 | ||
f2aea36d JG |
222 | ASSERT_LOCKED(stream->lock); |
223 | /* | |
224 | * Acquire a reference to the current trace chunk to ensure | |
225 | * it is not reclaimed when `stream_rotate_data_file` is called. | |
226 | * Failing to do so would violate the contract of the trace | |
227 | * chunk API as an active file descriptor would outlive the | |
228 | * trace chunk. | |
229 | */ | |
230 | acquired_reference = lttng_trace_chunk_get(stream->trace_chunk); | |
231 | assert(acquired_reference); | |
232 | previous_chunk = stream->trace_chunk; | |
233 | ||
234 | /* | |
235 | * Steal the stream's reference to its stream_fd. A new | |
236 | * stream_fd will be created when the rotation completes and | |
237 | * the orinal stream_fd will be used to copy the "extra" data | |
238 | * to the new file. | |
239 | */ | |
240 | assert(stream->stream_fd); | |
241 | previous_stream_fd = stream->stream_fd; | |
242 | stream->stream_fd = NULL; | |
243 | ||
244 | assert(!stream->is_metadata); | |
245 | assert(stream->tracefile_size_current > | |
246 | stream->pos_after_last_complete_data_index); | |
247 | misplaced_data_size = stream->tracefile_size_current - | |
248 | stream->pos_after_last_complete_data_index; | |
249 | copy_bytes_left = misplaced_data_size; | |
250 | previous_stream_copy_origin = stream->pos_after_last_complete_data_index; | |
251 | ||
252 | ret = stream_rotate_data_file(stream); | |
253 | if (ret) { | |
254 | goto end; | |
255 | } | |
256 | ||
4147107d | 257 | assert(stream->stream_fd); |
f2aea36d JG |
258 | /* |
259 | * Seek the current tracefile to the position at which the rotation | |
260 | * should have occurred. | |
261 | */ | |
262 | lseek_ret = lseek(previous_stream_fd->fd, previous_stream_copy_origin, | |
263 | SEEK_SET); | |
264 | if (lseek_ret < 0) { | |
265 | PERROR("Failed to seek to offset %" PRIu64 | |
266 | " while copying extra data received before a stream rotation", | |
267 | (uint64_t) previous_stream_copy_origin); | |
268 | ret = -1; | |
269 | goto end; | |
270 | } | |
271 | ||
272 | /* Move data from the old file to the new file. */ | |
273 | while (copy_bytes_left) { | |
274 | ssize_t io_ret; | |
275 | char copy_buffer[FILE_IO_STACK_BUFFER_SIZE]; | |
276 | const off_t copy_size_this_pass = min_t( | |
277 | off_t, copy_bytes_left, sizeof(copy_buffer)); | |
278 | ||
279 | io_ret = lttng_read(previous_stream_fd->fd, copy_buffer, | |
280 | copy_size_this_pass); | |
281 | if (io_ret < (ssize_t) copy_size_this_pass) { | |
282 | if (io_ret == -1) { | |
283 | PERROR("Failed to read %" PRIu64 | |
284 | " bytes from fd %i in %s(), returned %zi", | |
285 | copy_size_this_pass, | |
286 | previous_stream_fd->fd, | |
287 | __FUNCTION__, io_ret); | |
288 | } else { | |
289 | ERR("Failed to read %" PRIu64 | |
290 | " bytes from fd %i in %s(), returned %zi", | |
291 | copy_size_this_pass, | |
292 | previous_stream_fd->fd, | |
293 | __FUNCTION__, io_ret); | |
294 | } | |
295 | ret = -1; | |
296 | goto end; | |
297 | } | |
298 | ||
299 | io_ret = lttng_write(stream->stream_fd->fd, copy_buffer, | |
300 | copy_size_this_pass); | |
301 | if (io_ret < (ssize_t) copy_size_this_pass) { | |
302 | if (io_ret == -1) { | |
303 | PERROR("Failed to write %" PRIu64 | |
304 | " bytes from fd %i in %s(), returned %zi", | |
305 | copy_size_this_pass, | |
306 | stream->stream_fd->fd, | |
307 | __FUNCTION__, io_ret); | |
308 | } else { | |
309 | ERR("Failed to write %" PRIu64 | |
310 | " bytes from fd %i in %s(), returned %zi", | |
311 | copy_size_this_pass, | |
312 | stream->stream_fd->fd, | |
313 | __FUNCTION__, io_ret); | |
314 | } | |
315 | ret = -1; | |
316 | goto end; | |
317 | } | |
318 | copy_bytes_left -= copy_size_this_pass; | |
319 | } | |
320 | ||
321 | /* Truncate the file to get rid of the excess data. */ | |
322 | ret = ftruncate(previous_stream_fd->fd, previous_stream_copy_origin); | |
323 | if (ret) { | |
324 | PERROR("Failed to truncate current stream file to offset %" PRIu64, | |
325 | previous_stream_copy_origin); | |
326 | goto end; | |
327 | } | |
328 | ||
329 | /* | |
330 | * Update the offset and FD of all the eventual indexes created by the | |
331 | * data connection before the rotation command arrived. | |
332 | */ | |
333 | ret = relay_index_switch_all_files(stream); | |
334 | if (ret < 0) { | |
335 | ERR("Failed to rotate index file"); | |
336 | goto end; | |
337 | } | |
338 | ||
339 | stream->tracefile_size_current = misplaced_data_size; | |
340 | /* Index and data contents are back in sync. */ | |
341 | stream->pos_after_last_complete_data_index = 0; | |
342 | ret = 0; | |
343 | end: | |
344 | lttng_trace_chunk_put(previous_chunk); | |
345 | stream_fd_put(previous_stream_fd); | |
346 | return ret; | |
347 | } | |
348 | ||
c35f9726 JG |
349 | /* |
350 | * Check if a stream's data file (as opposed to index) should be rotated | |
351 | * (for session rotation). | |
352 | * Must be called with the stream lock held. | |
353 | * | |
354 | * Return 0 on success, a negative value on error. | |
355 | */ | |
356 | static int try_rotate_stream_data(struct relay_stream *stream) | |
357 | { | |
358 | int ret = 0; | |
359 | ||
360 | if (caa_likely(!stream->ongoing_rotation.is_set)) { | |
361 | /* No rotation expected. */ | |
362 | goto end; | |
363 | } | |
364 | ||
365 | if (stream->ongoing_rotation.value.data_rotated) { | |
366 | /* Rotation of the data file has already occurred. */ | |
367 | goto end; | |
368 | } | |
369 | ||
370 | if (stream->prev_data_seq == -1ULL || | |
371 | stream->prev_data_seq + 1 < stream->ongoing_rotation.value.seq_num) { | |
372 | /* | |
373 | * The next packet that will be written is not part of the next | |
374 | * chunk yet. | |
375 | */ | |
376 | DBG("Stream %" PRIu64 " not yet ready for rotation (rotate_at_seq_num = %" PRIu64 | |
377 | ", prev_data_seq = %" PRIu64 ")", | |
378 | stream->stream_handle, | |
379 | stream->ongoing_rotation.value.seq_num, | |
380 | stream->prev_data_seq); | |
381 | goto end; | |
382 | } else if (stream->prev_data_seq > stream->ongoing_rotation.value.seq_num) { | |
383 | /* | |
384 | * prev_data_seq is checked here since indexes and rotation | |
385 | * commands are serialized with respect to each other. | |
386 | */ | |
387 | DBG("Rotation after too much data has been written in tracefile " | |
388 | "for stream %" PRIu64 ", need to truncate before " | |
389 | "rotating", stream->stream_handle); | |
390 | ret = rotate_truncate_stream(stream); | |
391 | if (ret) { | |
392 | ERR("Failed to truncate stream"); | |
393 | goto end; | |
394 | } | |
395 | } else { | |
396 | ret = stream_rotate_data_file(stream); | |
397 | } | |
398 | ||
399 | end: | |
400 | return ret; | |
401 | } | |
402 | ||
403 | /* | |
404 | * Close the current index file if it is open, and create a new one. | |
405 | * | |
406 | * Return 0 on success, -1 on error. | |
407 | */ | |
408 | static int create_index_file(struct relay_stream *stream, | |
409 | struct lttng_trace_chunk *chunk) | |
410 | { | |
411 | int ret; | |
412 | uint32_t major, minor; | |
413 | char *index_subpath = NULL; | |
3a735fa7 | 414 | enum lttng_trace_chunk_status status; |
c35f9726 JG |
415 | |
416 | ASSERT_LOCKED(stream->lock); | |
417 | ||
418 | /* Put ref on previous index_file. */ | |
419 | if (stream->index_file) { | |
420 | lttng_index_file_put(stream->index_file); | |
421 | stream->index_file = NULL; | |
422 | } | |
423 | major = stream->trace->session->major; | |
424 | minor = stream->trace->session->minor; | |
425 | ||
426 | if (!chunk) { | |
427 | ret = 0; | |
428 | goto end; | |
429 | } | |
430 | ret = asprintf(&index_subpath, "%s/%s", stream->path_name, | |
431 | DEFAULT_INDEX_DIR); | |
432 | if (ret < 0) { | |
433 | goto end; | |
434 | } | |
435 | ||
3a735fa7 | 436 | status = lttng_trace_chunk_create_subdirectory(chunk, |
c35f9726 JG |
437 | index_subpath); |
438 | free(index_subpath); | |
3a735fa7 MD |
439 | if (status != LTTNG_TRACE_CHUNK_STATUS_OK) { |
440 | ret = -1; | |
c35f9726 JG |
441 | goto end; |
442 | } | |
443 | stream->index_file = lttng_index_file_create_from_trace_chunk( | |
444 | chunk, stream->path_name, | |
445 | stream->channel_name, stream->tracefile_size, | |
446 | stream->tracefile_current_index, | |
447 | lttng_to_index_major(major, minor), | |
448 | lttng_to_index_minor(major, minor), true); | |
449 | if (!stream->index_file) { | |
450 | ret = -1; | |
451 | goto end; | |
452 | } | |
453 | ||
454 | ret = 0; | |
455 | ||
456 | end: | |
457 | return ret; | |
458 | } | |
459 | ||
460 | /* | |
461 | * Check if a stream's index file should be rotated (for session rotation). | |
462 | * Must be called with the stream lock held. | |
463 | * | |
464 | * Return 0 on success, a negative value on error. | |
465 | */ | |
466 | static int try_rotate_stream_index(struct relay_stream *stream) | |
467 | { | |
468 | int ret = 0; | |
469 | ||
470 | if (!stream->ongoing_rotation.is_set) { | |
471 | /* No rotation expected. */ | |
472 | goto end; | |
473 | } | |
474 | ||
475 | if (stream->ongoing_rotation.value.index_rotated) { | |
476 | /* Rotation of the index has already occurred. */ | |
477 | goto end; | |
478 | } | |
479 | ||
480 | if (stream->prev_index_seq == -1ULL || | |
481 | stream->prev_index_seq + 1 < stream->ongoing_rotation.value.seq_num) { | |
482 | DBG("Stream %" PRIu64 " index not yet ready for rotation (rotate_at_seq_num = %" PRIu64 ", prev_index_seq = %" PRIu64 ")", | |
483 | stream->stream_handle, | |
484 | stream->ongoing_rotation.value.seq_num, | |
485 | stream->prev_index_seq); | |
486 | goto end; | |
487 | } else { | |
488 | /* The next index belongs to the new trace chunk; rotate. */ | |
489 | assert(stream->prev_index_seq + 1 == | |
490 | stream->ongoing_rotation.value.seq_num); | |
491 | DBG("Rotating stream %" PRIu64 " index file", | |
492 | stream->stream_handle); | |
493 | ret = create_index_file(stream, | |
494 | stream->ongoing_rotation.value.next_trace_chunk); | |
495 | stream->ongoing_rotation.value.index_rotated = true; | |
496 | ||
497 | if (stream->ongoing_rotation.value.data_rotated && | |
498 | stream->ongoing_rotation.value.index_rotated) { | |
499 | /* Rotation completed; reset its state. */ | |
500 | DBG("Rotation completed for stream %" PRIu64, | |
501 | stream->stream_handle); | |
502 | stream_complete_rotation(stream); | |
503 | } | |
504 | } | |
505 | ||
506 | end: | |
507 | return ret; | |
508 | } | |
509 | ||
348a81dc JG |
510 | static int stream_set_trace_chunk(struct relay_stream *stream, |
511 | struct lttng_trace_chunk *chunk) | |
512 | { | |
513 | int ret = 0; | |
514 | enum lttng_trace_chunk_status status; | |
515 | bool acquired_reference; | |
c35f9726 | 516 | struct stream_fd *new_stream_fd = NULL; |
348a81dc | 517 | |
348a81dc JG |
518 | status = lttng_trace_chunk_create_subdirectory(chunk, |
519 | stream->path_name); | |
520 | if (status != LTTNG_TRACE_CHUNK_STATUS_OK) { | |
521 | ret = -1; | |
522 | goto end; | |
523 | } | |
524 | ||
525 | lttng_trace_chunk_put(stream->trace_chunk); | |
526 | acquired_reference = lttng_trace_chunk_get(chunk); | |
527 | assert(acquired_reference); | |
528 | stream->trace_chunk = chunk; | |
c35f9726 JG |
529 | |
530 | if (stream->stream_fd) { | |
531 | stream_fd_put(stream->stream_fd); | |
532 | stream->stream_fd = NULL; | |
533 | } | |
534 | ret = stream_create_data_output_file_from_trace_chunk(stream, chunk, | |
535 | false, &new_stream_fd); | |
536 | stream->stream_fd = new_stream_fd; | |
348a81dc | 537 | end: |
348a81dc JG |
538 | return ret; |
539 | } | |
540 | ||
2a174661 | 541 | /* |
7591bab1 | 542 | * We keep ownership of path_name and channel_name. |
2a174661 | 543 | */ |
7591bab1 MD |
544 | struct relay_stream *stream_create(struct ctf_trace *trace, |
545 | uint64_t stream_handle, char *path_name, | |
546 | char *channel_name, uint64_t tracefile_size, | |
348a81dc | 547 | uint64_t tracefile_count) |
2a174661 | 548 | { |
7591bab1 MD |
549 | int ret; |
550 | struct relay_stream *stream = NULL; | |
551 | struct relay_session *session = trace->session; | |
348a81dc JG |
552 | bool acquired_reference = false; |
553 | struct lttng_trace_chunk *current_trace_chunk; | |
2a174661 | 554 | |
7591bab1 MD |
555 | stream = zmalloc(sizeof(struct relay_stream)); |
556 | if (stream == NULL) { | |
557 | PERROR("relay stream zmalloc"); | |
7591bab1 MD |
558 | goto error_no_alloc; |
559 | } | |
2a174661 | 560 | |
7591bab1 | 561 | stream->stream_handle = stream_handle; |
a8f9f353 | 562 | stream->prev_data_seq = -1ULL; |
7a45c7e6 | 563 | stream->prev_index_seq = -1ULL; |
bda7c7b9 | 564 | stream->last_net_seq_num = -1ULL; |
7591bab1 MD |
565 | stream->ctf_stream_id = -1ULL; |
566 | stream->tracefile_size = tracefile_size; | |
567 | stream->tracefile_count = tracefile_count; | |
568 | stream->path_name = path_name; | |
569 | stream->channel_name = channel_name; | |
2f9c3030 | 570 | stream->beacon_ts_end = -1ULL; |
7591bab1 MD |
571 | lttng_ht_node_init_u64(&stream->node, stream->stream_handle); |
572 | pthread_mutex_init(&stream->lock, NULL); | |
7591bab1 MD |
573 | urcu_ref_init(&stream->ref); |
574 | ctf_trace_get(trace); | |
575 | stream->trace = trace; | |
2a174661 | 576 | |
348a81dc JG |
577 | pthread_mutex_lock(&trace->session->lock); |
578 | current_trace_chunk = trace->session->current_trace_chunk; | |
579 | if (current_trace_chunk) { | |
580 | acquired_reference = lttng_trace_chunk_get(current_trace_chunk); | |
581 | } | |
582 | pthread_mutex_unlock(&trace->session->lock); | |
583 | if (!acquired_reference) { | |
584 | ERR("Cannot create stream for channel \"%s\" as a reference to the session's current trace chunk could not be acquired", | |
585 | channel_name); | |
7591bab1 MD |
586 | ret = -1; |
587 | goto end; | |
2a174661 DG |
588 | } |
589 | ||
348a81dc JG |
590 | stream->indexes_ht = lttng_ht_new(0, LTTNG_HT_TYPE_U64); |
591 | if (!stream->indexes_ht) { | |
592 | ERR("Cannot created indexes_ht"); | |
593 | ret = -1; | |
7591bab1 MD |
594 | goto end; |
595 | } | |
2a174661 | 596 | |
c35f9726 | 597 | pthread_mutex_lock(&stream->lock); |
348a81dc | 598 | ret = stream_set_trace_chunk(stream, current_trace_chunk); |
c35f9726 | 599 | pthread_mutex_unlock(&stream->lock); |
348a81dc JG |
600 | if (ret) { |
601 | ERR("Failed to set the current trace chunk of session \"%s\" on newly created stream of channel \"%s\"", | |
602 | trace->session->session_name, | |
603 | stream->channel_name); | |
7591bab1 MD |
604 | ret = -1; |
605 | goto end; | |
2a174661 | 606 | } |
a44ca2ca MD |
607 | stream->tfa = tracefile_array_create(stream->tracefile_count); |
608 | if (!stream->tfa) { | |
609 | ret = -1; | |
610 | goto end; | |
611 | } | |
7591bab1 | 612 | |
348a81dc JG |
613 | stream->is_metadata = !strcmp(stream->channel_name, |
614 | DEFAULT_METADATA_NAME); | |
7591bab1 MD |
615 | stream->in_recv_list = true; |
616 | ||
617 | /* | |
618 | * Add the stream in the recv list of the session. Once the end stream | |
619 | * message is received, all session streams are published. | |
620 | */ | |
621 | pthread_mutex_lock(&session->recv_list_lock); | |
622 | cds_list_add_rcu(&stream->recv_node, &session->recv_list); | |
623 | session->stream_count++; | |
624 | pthread_mutex_unlock(&session->recv_list_lock); | |
625 | ||
626 | /* | |
627 | * Both in the ctf_trace object and the global stream ht since the data | |
628 | * side of the relayd does not have the concept of session. | |
629 | */ | |
630 | lttng_ht_add_unique_u64(relay_streams_ht, &stream->node); | |
77f7bd85 | 631 | stream->in_stream_ht = true; |
2a174661 | 632 | |
7591bab1 MD |
633 | DBG("Relay new stream added %s with ID %" PRIu64, stream->channel_name, |
634 | stream->stream_handle); | |
635 | ret = 0; | |
636 | ||
637 | end: | |
638 | if (ret) { | |
639 | if (stream->stream_fd) { | |
640 | stream_fd_put(stream->stream_fd); | |
641 | stream->stream_fd = NULL; | |
2a174661 | 642 | } |
7591bab1 MD |
643 | stream_put(stream); |
644 | stream = NULL; | |
2a174661 | 645 | } |
317eadef JG |
646 | if (acquired_reference) { |
647 | lttng_trace_chunk_put(current_trace_chunk); | |
648 | } | |
7591bab1 | 649 | return stream; |
2a174661 | 650 | |
7591bab1 MD |
651 | error_no_alloc: |
652 | /* | |
653 | * path_name and channel_name need to be freed explicitly here | |
654 | * because we cannot rely on stream_put(). | |
655 | */ | |
656 | free(path_name); | |
657 | free(channel_name); | |
658 | return NULL; | |
659 | } | |
660 | ||
661 | /* | |
662 | * Called with the session lock held. | |
663 | */ | |
664 | void stream_publish(struct relay_stream *stream) | |
665 | { | |
666 | struct relay_session *session; | |
667 | ||
668 | pthread_mutex_lock(&stream->lock); | |
669 | if (stream->published) { | |
670 | goto unlock; | |
2a174661 DG |
671 | } |
672 | ||
7591bab1 | 673 | session = stream->trace->session; |
2a174661 | 674 | |
7591bab1 MD |
675 | pthread_mutex_lock(&session->recv_list_lock); |
676 | if (stream->in_recv_list) { | |
677 | cds_list_del_rcu(&stream->recv_node); | |
678 | stream->in_recv_list = false; | |
679 | } | |
680 | pthread_mutex_unlock(&session->recv_list_lock); | |
2a174661 | 681 | |
7591bab1 MD |
682 | pthread_mutex_lock(&stream->trace->stream_list_lock); |
683 | cds_list_add_rcu(&stream->stream_node, &stream->trace->stream_list); | |
684 | pthread_mutex_unlock(&stream->trace->stream_list_lock); | |
2a174661 | 685 | |
7591bab1 MD |
686 | stream->published = true; |
687 | unlock: | |
2a174661 | 688 | pthread_mutex_unlock(&stream->lock); |
2a174661 DG |
689 | } |
690 | ||
7591bab1 | 691 | /* |
77f7bd85 | 692 | * Stream must be protected by holding the stream lock or by virtue of being |
ce4d4083 | 693 | * called from stream_destroy. |
7591bab1 MD |
694 | */ |
695 | static void stream_unpublish(struct relay_stream *stream) | |
2a174661 | 696 | { |
77f7bd85 MD |
697 | if (stream->in_stream_ht) { |
698 | struct lttng_ht_iter iter; | |
699 | int ret; | |
700 | ||
701 | iter.iter.node = &stream->node.node; | |
702 | ret = lttng_ht_del(relay_streams_ht, &iter); | |
703 | assert(!ret); | |
704 | stream->in_stream_ht = false; | |
705 | } | |
706 | if (stream->published) { | |
707 | pthread_mutex_lock(&stream->trace->stream_list_lock); | |
708 | cds_list_del_rcu(&stream->stream_node); | |
709 | pthread_mutex_unlock(&stream->trace->stream_list_lock); | |
710 | stream->published = false; | |
7591bab1 | 711 | } |
7591bab1 MD |
712 | } |
713 | ||
714 | static void stream_destroy(struct relay_stream *stream) | |
715 | { | |
716 | if (stream->indexes_ht) { | |
49e614cb MD |
717 | /* |
718 | * Calling lttng_ht_destroy in call_rcu worker thread so | |
719 | * we don't hold the RCU read-side lock while calling | |
720 | * it. | |
721 | */ | |
7591bab1 MD |
722 | lttng_ht_destroy(stream->indexes_ht); |
723 | } | |
a44ca2ca MD |
724 | if (stream->tfa) { |
725 | tracefile_array_destroy(stream->tfa); | |
726 | } | |
7591bab1 MD |
727 | free(stream->path_name); |
728 | free(stream->channel_name); | |
729 | free(stream); | |
730 | } | |
731 | ||
732 | static void stream_destroy_rcu(struct rcu_head *rcu_head) | |
733 | { | |
734 | struct relay_stream *stream = | |
735 | caa_container_of(rcu_head, struct relay_stream, rcu_node); | |
736 | ||
737 | stream_destroy(stream); | |
738 | } | |
739 | ||
740 | /* | |
741 | * No need to take stream->lock since this is only called on the final | |
742 | * stream_put which ensures that a single thread may act on the stream. | |
7591bab1 MD |
743 | */ |
744 | static void stream_release(struct urcu_ref *ref) | |
745 | { | |
746 | struct relay_stream *stream = | |
747 | caa_container_of(ref, struct relay_stream, ref); | |
748 | struct relay_session *session; | |
2a174661 | 749 | |
7591bab1 MD |
750 | session = stream->trace->session; |
751 | ||
752 | DBG("Releasing stream id %" PRIu64, stream->stream_handle); | |
753 | ||
754 | pthread_mutex_lock(&session->recv_list_lock); | |
755 | session->stream_count--; | |
756 | if (stream->in_recv_list) { | |
757 | cds_list_del_rcu(&stream->recv_node); | |
758 | stream->in_recv_list = false; | |
759 | } | |
760 | pthread_mutex_unlock(&session->recv_list_lock); | |
2a174661 | 761 | |
7591bab1 MD |
762 | stream_unpublish(stream); |
763 | ||
764 | if (stream->stream_fd) { | |
765 | stream_fd_put(stream->stream_fd); | |
766 | stream->stream_fd = NULL; | |
767 | } | |
f8f3885c MD |
768 | if (stream->index_file) { |
769 | lttng_index_file_put(stream->index_file); | |
770 | stream->index_file = NULL; | |
7591bab1 MD |
771 | } |
772 | if (stream->trace) { | |
773 | ctf_trace_put(stream->trace); | |
774 | stream->trace = NULL; | |
775 | } | |
c35f9726 | 776 | stream_complete_rotation(stream); |
348a81dc JG |
777 | lttng_trace_chunk_put(stream->trace_chunk); |
778 | stream->trace_chunk = NULL; | |
7591bab1 MD |
779 | |
780 | call_rcu(&stream->rcu_node, stream_destroy_rcu); | |
2a174661 DG |
781 | } |
782 | ||
7591bab1 | 783 | void stream_put(struct relay_stream *stream) |
2a174661 | 784 | { |
7591bab1 | 785 | rcu_read_lock(); |
7591bab1 MD |
786 | assert(stream->ref.refcount != 0); |
787 | /* | |
788 | * Wait until we have processed all the stream packets before | |
789 | * actually putting our last stream reference. | |
790 | */ | |
7591bab1 | 791 | urcu_ref_put(&stream->ref, stream_release); |
7591bab1 MD |
792 | rcu_read_unlock(); |
793 | } | |
794 | ||
c35f9726 JG |
795 | int stream_set_pending_rotation(struct relay_stream *stream, |
796 | struct lttng_trace_chunk *next_trace_chunk, | |
797 | uint64_t rotation_sequence_number) | |
798 | { | |
799 | int ret = 0; | |
800 | const struct relay_stream_rotation rotation = { | |
801 | .seq_num = rotation_sequence_number, | |
802 | .next_trace_chunk = next_trace_chunk, | |
803 | }; | |
804 | ||
805 | if (stream->ongoing_rotation.is_set) { | |
806 | ERR("Attempted to set a pending rotation on a stream already being rotated (protocol error)"); | |
807 | ret = -1; | |
808 | goto end; | |
809 | } | |
810 | ||
811 | if (next_trace_chunk) { | |
812 | const bool reference_acquired = | |
813 | lttng_trace_chunk_get(next_trace_chunk); | |
814 | ||
815 | assert(reference_acquired); | |
816 | } | |
817 | LTTNG_OPTIONAL_SET(&stream->ongoing_rotation, rotation); | |
818 | ||
819 | DBG("Setting pending rotation: stream_id = %" PRIu64 ", rotation_seq_num = %" PRIu64, | |
820 | stream->stream_handle, rotation_sequence_number); | |
821 | if (stream->is_metadata) { | |
822 | /* | |
823 | * A metadata stream has no index; consider it already rotated. | |
824 | */ | |
825 | stream->ongoing_rotation.value.index_rotated = true; | |
826 | ret = stream_rotate_data_file(stream); | |
827 | } else { | |
828 | ret = try_rotate_stream_data(stream); | |
829 | if (ret < 0) { | |
830 | goto end; | |
831 | } | |
832 | ||
833 | ret = try_rotate_stream_index(stream); | |
834 | if (ret < 0) { | |
835 | goto end; | |
836 | } | |
837 | } | |
838 | end: | |
839 | return ret; | |
840 | } | |
841 | ||
bda7c7b9 | 842 | void try_stream_close(struct relay_stream *stream) |
7591bab1 | 843 | { |
98ba050e JR |
844 | bool session_aborted; |
845 | struct relay_session *session = stream->trace->session; | |
846 | ||
bda7c7b9 | 847 | DBG("Trying to close stream %" PRIu64, stream->stream_handle); |
98ba050e JR |
848 | |
849 | pthread_mutex_lock(&session->lock); | |
850 | session_aborted = session->aborted; | |
851 | pthread_mutex_unlock(&session->lock); | |
852 | ||
7591bab1 | 853 | pthread_mutex_lock(&stream->lock); |
bda7c7b9 JG |
854 | /* |
855 | * Can be called concurently by connection close and reception of last | |
856 | * pending data. | |
857 | */ | |
858 | if (stream->closed) { | |
859 | pthread_mutex_unlock(&stream->lock); | |
860 | DBG("closing stream %" PRIu64 " aborted since it is already marked as closed", stream->stream_handle); | |
861 | return; | |
862 | } | |
863 | ||
864 | stream->close_requested = true; | |
3d07a857 MD |
865 | |
866 | if (stream->last_net_seq_num == -1ULL) { | |
867 | /* | |
868 | * Handle connection close without explicit stream close | |
869 | * command. | |
870 | * | |
871 | * We can be clever about indexes partially received in | |
872 | * cases where we received the data socket part, but not | |
873 | * the control socket part: since we're currently closing | |
874 | * the stream on behalf of the control socket, we *know* | |
875 | * there won't be any more control information for this | |
876 | * socket. Therefore, we can destroy all indexes for | |
877 | * which we have received only the file descriptor (from | |
878 | * data socket). This takes care of consumerd crashes | |
879 | * between sending the data and control information for | |
880 | * a packet. Since those are sent in that order, we take | |
881 | * care of consumerd crashes. | |
882 | */ | |
5312a3ed | 883 | DBG("relay_index_close_partial_fd"); |
3d07a857 MD |
884 | relay_index_close_partial_fd(stream); |
885 | /* | |
886 | * Use the highest net_seq_num we currently have pending | |
887 | * As end of stream indicator. Leave last_net_seq_num | |
888 | * at -1ULL if we cannot find any index. | |
889 | */ | |
890 | stream->last_net_seq_num = relay_index_find_last(stream); | |
5312a3ed | 891 | DBG("Updating stream->last_net_seq_num to %" PRIu64, stream->last_net_seq_num); |
3d07a857 MD |
892 | /* Fall-through into the next check. */ |
893 | } | |
894 | ||
bda7c7b9 | 895 | if (stream->last_net_seq_num != -1ULL && |
a8f9f353 | 896 | ((int64_t) (stream->prev_data_seq - stream->last_net_seq_num)) < 0 |
98ba050e | 897 | && !session_aborted) { |
3d07a857 MD |
898 | /* |
899 | * Don't close since we still have data pending. This | |
900 | * handles cases where an explicit close command has | |
901 | * been received for this stream, and cases where the | |
902 | * connection has been closed, and we are awaiting for | |
903 | * index information from the data socket. It is | |
904 | * therefore expected that all the index fd information | |
905 | * we need has already been received on the control | |
906 | * socket. Matching index information from data socket | |
907 | * should be Expected Soon(TM). | |
908 | * | |
909 | * TODO: We should implement a timer to garbage collect | |
910 | * streams after a timeout to be resilient against a | |
911 | * consumerd implementation that would not match this | |
912 | * expected behavior. | |
913 | */ | |
bda7c7b9 JG |
914 | pthread_mutex_unlock(&stream->lock); |
915 | DBG("closing stream %" PRIu64 " aborted since it still has data pending", stream->stream_handle); | |
916 | return; | |
917 | } | |
3d07a857 MD |
918 | /* |
919 | * We received all the indexes we can expect. | |
920 | */ | |
77f7bd85 | 921 | stream_unpublish(stream); |
2229a09c | 922 | stream->closed = true; |
bda7c7b9 | 923 | /* Relay indexes are only used by the "consumer/sessiond" end. */ |
7591bab1 | 924 | relay_index_close_all(stream); |
d91bc249 MD |
925 | |
926 | /* | |
927 | * If we are closed by an application exiting (per-pid buffers), | |
928 | * we need to put our reference on the stream trace chunk right | |
929 | * away, because otherwise still holding the reference on the | |
930 | * trace chunk could allow a viewer stream (which holds a reference | |
931 | * to the stream) to postpone destroy waiting for the chunk to cease | |
932 | * to exist endlessly until the viewer is detached. | |
933 | */ | |
934 | ||
935 | /* Put stream fd before put chunk. */ | |
936 | if (stream->stream_fd) { | |
937 | stream_fd_put(stream->stream_fd); | |
938 | stream->stream_fd = NULL; | |
939 | } | |
940 | if (stream->index_file) { | |
941 | lttng_index_file_put(stream->index_file); | |
942 | stream->index_file = NULL; | |
943 | } | |
944 | lttng_trace_chunk_put(stream->trace_chunk); | |
945 | stream->trace_chunk = NULL; | |
7591bab1 | 946 | pthread_mutex_unlock(&stream->lock); |
bda7c7b9 | 947 | DBG("Succeeded in closing stream %" PRIu64, stream->stream_handle); |
7591bab1 MD |
948 | stream_put(stream); |
949 | } | |
950 | ||
c35f9726 JG |
951 | int stream_init_packet(struct relay_stream *stream, size_t packet_size, |
952 | bool *file_rotated) | |
953 | { | |
954 | int ret = 0; | |
955 | ||
956 | ASSERT_LOCKED(stream->lock); | |
1ad1103b JG |
957 | |
958 | if (!stream->stream_fd || !stream->trace_chunk) { | |
959 | ERR("Protocol error: received a packet for a stream that doesn't have a current trace chunk: stream_id = %" PRIu64 ", channel_name = %s", | |
960 | stream->stream_handle, stream->channel_name); | |
961 | ret = -1; | |
962 | goto end; | |
963 | } | |
964 | ||
c35f9726 JG |
965 | if (caa_likely(stream->tracefile_size == 0)) { |
966 | /* No size limit set; nothing to check. */ | |
967 | goto end; | |
968 | } | |
969 | ||
970 | /* | |
971 | * Check if writing the new packet would exceed the maximal file size. | |
972 | */ | |
973 | if (caa_unlikely((stream->tracefile_size_current + packet_size) > | |
974 | stream->tracefile_size)) { | |
975 | const uint64_t new_file_index = | |
976 | (stream->tracefile_current_index + 1) % | |
977 | stream->tracefile_count; | |
978 | ||
979 | if (new_file_index < stream->tracefile_current_index) { | |
980 | stream->tracefile_wrapped_around = true; | |
981 | } | |
982 | DBG("New stream packet causes stream file rotation: stream_id = %" PRIu64 | |
983 | ", current_file_size = %" PRIu64 | |
76ee9245 | 984 | ", packet_size = %zu, current_file_index = %" PRIu64 |
c35f9726 JG |
985 | " new_file_index = %" PRIu64, |
986 | stream->stream_handle, | |
987 | stream->tracefile_size_current, packet_size, | |
988 | stream->tracefile_current_index, new_file_index); | |
78118e3b | 989 | tracefile_array_file_rotate(stream->tfa, TRACEFILE_ROTATE_WRITE); |
c35f9726 JG |
990 | stream->tracefile_current_index = new_file_index; |
991 | ||
992 | if (stream->stream_fd) { | |
993 | stream_fd_put(stream->stream_fd); | |
994 | stream->stream_fd = NULL; | |
995 | } | |
996 | ret = stream_create_data_output_file_from_trace_chunk(stream, | |
997 | stream->trace_chunk, false, &stream->stream_fd); | |
998 | if (ret) { | |
999 | ERR("Failed to perform trace file rotation of stream %" PRIu64, | |
1000 | stream->stream_handle); | |
1001 | goto end; | |
1002 | } | |
1003 | ||
1004 | /* | |
1005 | * Reset current size because we just performed a stream | |
1006 | * rotation. | |
1007 | */ | |
1008 | stream->tracefile_size_current = 0; | |
1009 | *file_rotated = true; | |
1010 | } else { | |
1011 | *file_rotated = false; | |
1012 | } | |
1013 | end: | |
1014 | return ret; | |
1015 | } | |
1016 | ||
1017 | /* Note that the packet is not necessarily complete. */ | |
1018 | int stream_write(struct relay_stream *stream, | |
1019 | const struct lttng_buffer_view *packet, size_t padding_len) | |
1020 | { | |
1021 | int ret = 0; | |
1022 | ssize_t write_ret; | |
1023 | size_t padding_to_write = padding_len; | |
1024 | char padding_buffer[FILE_IO_STACK_BUFFER_SIZE]; | |
1025 | ||
1026 | ASSERT_LOCKED(stream->lock); | |
1027 | memset(padding_buffer, 0, | |
1028 | min(sizeof(padding_buffer), padding_to_write)); | |
1029 | ||
1ad1103b JG |
1030 | if (!stream->stream_fd || !stream->trace_chunk) { |
1031 | ERR("Protocol error: received a packet for a stream that doesn't have a current trace chunk: stream_id = %" PRIu64 ", channel_name = %s", | |
1032 | stream->stream_handle, stream->channel_name); | |
1033 | ret = -1; | |
1034 | goto end; | |
1035 | } | |
c35f9726 JG |
1036 | if (packet) { |
1037 | write_ret = lttng_write(stream->stream_fd->fd, | |
1038 | packet->data, packet->size); | |
1039 | if (write_ret != packet->size) { | |
1040 | PERROR("Failed to write to stream file of %sstream %" PRIu64, | |
1041 | stream->is_metadata ? "metadata " : "", | |
1042 | stream->stream_handle); | |
1043 | ret = -1; | |
1044 | goto end; | |
1045 | } | |
1046 | } | |
1047 | ||
1048 | while (padding_to_write > 0) { | |
1049 | const size_t padding_to_write_this_pass = | |
1050 | min(padding_to_write, sizeof(padding_buffer)); | |
1051 | ||
1052 | write_ret = lttng_write(stream->stream_fd->fd, | |
1053 | padding_buffer, padding_to_write_this_pass); | |
1054 | if (write_ret != padding_to_write_this_pass) { | |
1055 | PERROR("Failed to write padding to file of %sstream %" PRIu64, | |
1056 | stream->is_metadata ? "metadata " : "", | |
1057 | stream->stream_handle); | |
1058 | ret = -1; | |
1059 | goto end; | |
1060 | } | |
1061 | padding_to_write -= padding_to_write_this_pass; | |
1062 | } | |
1063 | ||
1064 | if (stream->is_metadata) { | |
014e956d JG |
1065 | stream->metadata_received += packet ? packet->size : 0; |
1066 | stream->metadata_received += padding_len; | |
c35f9726 JG |
1067 | } |
1068 | ||
8c865d87 | 1069 | DBG("Wrote to %sstream %" PRIu64 ": data_length = %zu, padding_length = %zu", |
c35f9726 JG |
1070 | stream->is_metadata ? "metadata " : "", |
1071 | stream->stream_handle, | |
8c865d87 | 1072 | packet ? packet->size : (size_t) 0, padding_len); |
c35f9726 JG |
1073 | end: |
1074 | return ret; | |
1075 | } | |
1076 | ||
1077 | /* | |
1078 | * Update index after receiving a packet for a data stream. | |
1079 | * | |
1080 | * Called with the stream lock held. | |
1081 | * | |
1082 | * Return 0 on success else a negative value. | |
1083 | */ | |
1084 | int stream_update_index(struct relay_stream *stream, uint64_t net_seq_num, | |
1085 | bool rotate_index, bool *flushed, uint64_t total_size) | |
1086 | { | |
1087 | int ret = 0; | |
1088 | uint64_t data_offset; | |
1089 | struct relay_index *index; | |
1090 | ||
92761772 | 1091 | assert(stream->trace_chunk); |
c35f9726 JG |
1092 | ASSERT_LOCKED(stream->lock); |
1093 | /* Get data offset because we are about to update the index. */ | |
1094 | data_offset = htobe64(stream->tracefile_size_current); | |
1095 | ||
1096 | DBG("handle_index_data: stream %" PRIu64 " net_seq_num %" PRIu64 " data offset %" PRIu64, | |
1097 | stream->stream_handle, net_seq_num, stream->tracefile_size_current); | |
1098 | ||
1099 | /* | |
1100 | * Lookup for an existing index for that stream id/sequence | |
1101 | * number. If it exists, the control thread has already received the | |
1102 | * data for it, thus we need to write it to disk. | |
1103 | */ | |
1104 | index = relay_index_get_by_id_or_create(stream, net_seq_num); | |
1105 | if (!index) { | |
1106 | ret = -1; | |
1107 | goto end; | |
1108 | } | |
1109 | ||
1110 | if (rotate_index || !stream->index_file) { | |
1111 | ret = create_index_file(stream, stream->trace_chunk); | |
1112 | if (ret) { | |
1113 | ERR("Failed to create index file for stream %" PRIu64, | |
1114 | stream->stream_handle); | |
1115 | /* Put self-ref for this index due to error. */ | |
1116 | relay_index_put(index); | |
1117 | index = NULL; | |
1118 | goto end; | |
1119 | } | |
1120 | } | |
1121 | ||
1122 | if (relay_index_set_file(index, stream->index_file, data_offset)) { | |
1123 | ret = -1; | |
1124 | /* Put self-ref for this index due to error. */ | |
1125 | relay_index_put(index); | |
1126 | index = NULL; | |
1127 | goto end; | |
1128 | } | |
1129 | ||
1130 | ret = relay_index_try_flush(index); | |
1131 | if (ret == 0) { | |
78118e3b | 1132 | tracefile_array_file_rotate(stream->tfa, TRACEFILE_ROTATE_READ); |
c35f9726 JG |
1133 | tracefile_array_commit_seq(stream->tfa); |
1134 | stream->index_received_seqcount++; | |
1135 | *flushed = true; | |
1136 | } else if (ret > 0) { | |
1137 | index->total_size = total_size; | |
1138 | /* No flush. */ | |
1139 | ret = 0; | |
1140 | } else { | |
1141 | /* | |
1142 | * ret < 0 | |
1143 | * | |
1144 | * relay_index_try_flush is responsible for the self-reference | |
1145 | * put of the index object on error. | |
1146 | */ | |
1147 | ERR("relay_index_try_flush error %d", ret); | |
1148 | ret = -1; | |
1149 | } | |
1150 | end: | |
1151 | return ret; | |
1152 | } | |
1153 | ||
1154 | int stream_complete_packet(struct relay_stream *stream, size_t packet_total_size, | |
1155 | uint64_t sequence_number, bool index_flushed) | |
1156 | { | |
1157 | int ret = 0; | |
1158 | ||
1159 | ASSERT_LOCKED(stream->lock); | |
1160 | ||
1161 | stream->tracefile_size_current += packet_total_size; | |
1162 | if (index_flushed) { | |
1163 | stream->pos_after_last_complete_data_index = | |
1164 | stream->tracefile_size_current; | |
1165 | stream->prev_index_seq = sequence_number; | |
1166 | ret = try_rotate_stream_index(stream); | |
1167 | if (ret < 0) { | |
1168 | goto end; | |
1169 | } | |
1170 | } | |
1171 | ||
1172 | stream->prev_data_seq = sequence_number; | |
1173 | ret = try_rotate_stream_data(stream); | |
d2ec9b88 | 1174 | |
c35f9726 JG |
1175 | end: |
1176 | return ret; | |
1177 | } | |
1178 | ||
1179 | int stream_add_index(struct relay_stream *stream, | |
1180 | const struct lttcomm_relayd_index *index_info) | |
1181 | { | |
1182 | int ret = 0; | |
1183 | struct relay_index *index; | |
1184 | ||
1185 | ASSERT_LOCKED(stream->lock); | |
1186 | ||
1187 | /* Live beacon handling */ | |
1188 | if (index_info->packet_size == 0) { | |
1189 | DBG("Received live beacon for stream %" PRIu64, | |
1190 | stream->stream_handle); | |
1191 | ||
1192 | /* | |
1193 | * Only flag a stream inactive when it has already | |
1194 | * received data and no indexes are in flight. | |
1195 | */ | |
1196 | if (stream->index_received_seqcount > 0 | |
1197 | && stream->indexes_in_flight == 0) { | |
1198 | stream->beacon_ts_end = index_info->timestamp_end; | |
1199 | } | |
1200 | ret = 0; | |
1201 | goto end; | |
1202 | } else { | |
1203 | stream->beacon_ts_end = -1ULL; | |
1204 | } | |
1205 | ||
1206 | if (stream->ctf_stream_id == -1ULL) { | |
1207 | stream->ctf_stream_id = index_info->stream_id; | |
1208 | } | |
1209 | ||
1210 | index = relay_index_get_by_id_or_create(stream, index_info->net_seq_num); | |
1211 | if (!index) { | |
1212 | ret = -1; | |
1213 | ERR("Failed to get or create index %" PRIu64, | |
1214 | index_info->net_seq_num); | |
1215 | goto end; | |
1216 | } | |
1217 | if (relay_index_set_control_data(index, index_info, | |
1218 | stream->trace->session->minor)) { | |
1219 | ERR("set_index_control_data error"); | |
1220 | relay_index_put(index); | |
1221 | ret = -1; | |
1222 | goto end; | |
1223 | } | |
1224 | ret = relay_index_try_flush(index); | |
1225 | if (ret == 0) { | |
78118e3b | 1226 | tracefile_array_file_rotate(stream->tfa, TRACEFILE_ROTATE_READ); |
c35f9726 JG |
1227 | tracefile_array_commit_seq(stream->tfa); |
1228 | stream->index_received_seqcount++; | |
1229 | stream->pos_after_last_complete_data_index += index->total_size; | |
1230 | stream->prev_index_seq = index_info->net_seq_num; | |
1231 | ||
1232 | ret = try_rotate_stream_index(stream); | |
1233 | if (ret < 0) { | |
1234 | goto end; | |
1235 | } | |
1236 | } else if (ret > 0) { | |
1237 | /* no flush. */ | |
1238 | ret = 0; | |
1239 | } else { | |
1240 | /* | |
1241 | * ret < 0 | |
1242 | * | |
1243 | * relay_index_try_flush is responsible for the self-reference | |
1244 | * put of the index object on error. | |
1245 | */ | |
1246 | ERR("relay_index_try_flush error %d", ret); | |
1247 | ret = -1; | |
1248 | } | |
1249 | end: | |
1250 | return ret; | |
1251 | } | |
1252 | ||
da412cde MD |
1253 | static void print_stream_indexes(struct relay_stream *stream) |
1254 | { | |
1255 | struct lttng_ht_iter iter; | |
1256 | struct relay_index *index; | |
1257 | ||
1258 | rcu_read_lock(); | |
1259 | cds_lfht_for_each_entry(stream->indexes_ht->ht, &iter.iter, index, | |
1260 | index_n.node) { | |
1261 | DBG("index %p net_seq_num %" PRIu64 " refcount %ld" | |
1262 | " stream %" PRIu64 " trace %" PRIu64 | |
1263 | " session %" PRIu64, | |
1264 | index, | |
1265 | index->index_n.key, | |
1266 | stream->ref.refcount, | |
1267 | index->stream->stream_handle, | |
1268 | index->stream->trace->id, | |
1269 | index->stream->trace->session->id); | |
1270 | } | |
1271 | rcu_read_unlock(); | |
1272 | } | |
1273 | ||
c35f9726 JG |
1274 | int stream_reset_file(struct relay_stream *stream) |
1275 | { | |
1276 | ASSERT_LOCKED(stream->lock); | |
1277 | ||
1278 | if (stream->stream_fd) { | |
1279 | stream_fd_put(stream->stream_fd); | |
1280 | stream->stream_fd = NULL; | |
1281 | } | |
1282 | ||
1283 | stream->tracefile_size_current = 0; | |
1284 | stream->prev_data_seq = 0; | |
1285 | stream->prev_index_seq = 0; | |
1286 | /* Note that this does not reset the tracefile array. */ | |
1287 | stream->tracefile_current_index = 0; | |
1288 | stream->pos_after_last_complete_data_index = 0; | |
1289 | ||
1290 | return stream_create_data_output_file_from_trace_chunk(stream, | |
1291 | stream->trace_chunk, true, &stream->stream_fd); | |
1292 | } | |
1293 | ||
7591bab1 MD |
1294 | void print_relay_streams(void) |
1295 | { | |
1296 | struct lttng_ht_iter iter; | |
1297 | struct relay_stream *stream; | |
1298 | ||
ce3f3ba3 JG |
1299 | if (!relay_streams_ht) { |
1300 | return; | |
1301 | } | |
1302 | ||
7591bab1 MD |
1303 | rcu_read_lock(); |
1304 | cds_lfht_for_each_entry(relay_streams_ht->ht, &iter.iter, stream, | |
1305 | node.node) { | |
1306 | if (!stream_get(stream)) { | |
1307 | continue; | |
1308 | } | |
1309 | DBG("stream %p refcount %ld stream %" PRIu64 " trace %" PRIu64 | |
1310 | " session %" PRIu64, | |
1311 | stream, | |
1312 | stream->ref.refcount, | |
1313 | stream->stream_handle, | |
1314 | stream->trace->id, | |
1315 | stream->trace->session->id); | |
da412cde | 1316 | print_stream_indexes(stream); |
7591bab1 MD |
1317 | stream_put(stream); |
1318 | } | |
1319 | rcu_read_unlock(); | |
2a174661 | 1320 | } |