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