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 | ||
f3fe2a92 | 212 | if (!LTTNG_OPTIONAL_GET(stream->ongoing_rotation).next_trace_chunk) { |
4147107d JG |
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 || | |
0f83d1cc MD |
371 | stream->ongoing_rotation.value.prev_data_net_seq == -1ULL || |
372 | stream->prev_data_seq < | |
373 | stream->ongoing_rotation.value.prev_data_net_seq) { | |
c35f9726 JG |
374 | /* |
375 | * The next packet that will be written is not part of the next | |
376 | * chunk yet. | |
377 | */ | |
0f83d1cc MD |
378 | DBG("Stream %" PRIu64 " data not yet ready for rotation " |
379 | "(rotate_at_index_packet_seq_num = %" PRIu64 | |
380 | ", rotate_at_prev_data_net_seq = %" PRIu64 | |
c35f9726 JG |
381 | ", prev_data_seq = %" PRIu64 ")", |
382 | stream->stream_handle, | |
0f83d1cc MD |
383 | stream->ongoing_rotation.value.packet_seq_num, |
384 | stream->ongoing_rotation.value.prev_data_net_seq, | |
c35f9726 JG |
385 | stream->prev_data_seq); |
386 | goto end; | |
0f83d1cc | 387 | } else if (stream->prev_data_seq > stream->ongoing_rotation.value.prev_data_net_seq) { |
c35f9726 JG |
388 | /* |
389 | * prev_data_seq is checked here since indexes and rotation | |
390 | * commands are serialized with respect to each other. | |
391 | */ | |
392 | DBG("Rotation after too much data has been written in tracefile " | |
393 | "for stream %" PRIu64 ", need to truncate before " | |
394 | "rotating", stream->stream_handle); | |
395 | ret = rotate_truncate_stream(stream); | |
396 | if (ret) { | |
397 | ERR("Failed to truncate stream"); | |
398 | goto end; | |
399 | } | |
400 | } else { | |
401 | ret = stream_rotate_data_file(stream); | |
402 | } | |
403 | ||
404 | end: | |
405 | return ret; | |
406 | } | |
407 | ||
408 | /* | |
409 | * Close the current index file if it is open, and create a new one. | |
410 | * | |
411 | * Return 0 on success, -1 on error. | |
412 | */ | |
413 | static int create_index_file(struct relay_stream *stream, | |
414 | struct lttng_trace_chunk *chunk) | |
415 | { | |
416 | int ret; | |
417 | uint32_t major, minor; | |
418 | char *index_subpath = NULL; | |
3a735fa7 | 419 | enum lttng_trace_chunk_status status; |
c35f9726 JG |
420 | |
421 | ASSERT_LOCKED(stream->lock); | |
422 | ||
423 | /* Put ref on previous index_file. */ | |
424 | if (stream->index_file) { | |
425 | lttng_index_file_put(stream->index_file); | |
426 | stream->index_file = NULL; | |
427 | } | |
428 | major = stream->trace->session->major; | |
429 | minor = stream->trace->session->minor; | |
430 | ||
431 | if (!chunk) { | |
432 | ret = 0; | |
433 | goto end; | |
434 | } | |
435 | ret = asprintf(&index_subpath, "%s/%s", stream->path_name, | |
436 | DEFAULT_INDEX_DIR); | |
437 | if (ret < 0) { | |
438 | goto end; | |
439 | } | |
440 | ||
3a735fa7 | 441 | status = lttng_trace_chunk_create_subdirectory(chunk, |
c35f9726 JG |
442 | index_subpath); |
443 | free(index_subpath); | |
3a735fa7 MD |
444 | if (status != LTTNG_TRACE_CHUNK_STATUS_OK) { |
445 | ret = -1; | |
c35f9726 JG |
446 | goto end; |
447 | } | |
448 | stream->index_file = lttng_index_file_create_from_trace_chunk( | |
449 | chunk, stream->path_name, | |
450 | stream->channel_name, stream->tracefile_size, | |
451 | stream->tracefile_current_index, | |
452 | lttng_to_index_major(major, minor), | |
453 | lttng_to_index_minor(major, minor), true); | |
454 | if (!stream->index_file) { | |
455 | ret = -1; | |
456 | goto end; | |
457 | } | |
458 | ||
459 | ret = 0; | |
460 | ||
461 | end: | |
462 | return ret; | |
463 | } | |
464 | ||
465 | /* | |
466 | * Check if a stream's index file should be rotated (for session rotation). | |
467 | * Must be called with the stream lock held. | |
468 | * | |
469 | * Return 0 on success, a negative value on error. | |
470 | */ | |
471 | static int try_rotate_stream_index(struct relay_stream *stream) | |
472 | { | |
473 | int ret = 0; | |
474 | ||
475 | if (!stream->ongoing_rotation.is_set) { | |
476 | /* No rotation expected. */ | |
477 | goto end; | |
478 | } | |
479 | ||
480 | if (stream->ongoing_rotation.value.index_rotated) { | |
481 | /* Rotation of the index has already occurred. */ | |
482 | goto end; | |
483 | } | |
484 | ||
0f83d1cc MD |
485 | if (!stream->received_packet_seq_num.is_set || |
486 | LTTNG_OPTIONAL_GET(stream->received_packet_seq_num) + 1 < | |
487 | stream->ongoing_rotation.value.packet_seq_num) { | |
488 | DBG("Stream %" PRIu64 " index not yet ready for rotation " | |
489 | "(rotate_at_packet_seq_num = %" PRIu64 | |
490 | ", received_packet_seq_num = " | |
491 | "(value = %" PRIu64 ", is_set = %" PRIu8 "))", | |
c35f9726 | 492 | stream->stream_handle, |
0f83d1cc MD |
493 | stream->ongoing_rotation.value.packet_seq_num, |
494 | stream->received_packet_seq_num.value, | |
495 | stream->received_packet_seq_num.is_set); | |
c35f9726 JG |
496 | goto end; |
497 | } else { | |
0f83d1cc MD |
498 | /* |
499 | * The next index belongs to the new trace chunk; rotate. | |
500 | * In overwrite mode, the packet seq num may jump over the | |
501 | * rotation position. | |
502 | */ | |
503 | assert(LTTNG_OPTIONAL_GET(stream->received_packet_seq_num) + 1 >= | |
504 | stream->ongoing_rotation.value.packet_seq_num); | |
c35f9726 JG |
505 | DBG("Rotating stream %" PRIu64 " index file", |
506 | stream->stream_handle); | |
507 | ret = create_index_file(stream, | |
508 | stream->ongoing_rotation.value.next_trace_chunk); | |
509 | stream->ongoing_rotation.value.index_rotated = true; | |
510 | ||
0f83d1cc MD |
511 | /* |
512 | * Set the rotation pivot position for the data, now that we have the | |
513 | * net_seq_num matching the packet_seq_num index pivot position. | |
514 | */ | |
515 | stream->ongoing_rotation.value.prev_data_net_seq = | |
516 | stream->prev_index_seq; | |
c35f9726 JG |
517 | if (stream->ongoing_rotation.value.data_rotated && |
518 | stream->ongoing_rotation.value.index_rotated) { | |
519 | /* Rotation completed; reset its state. */ | |
520 | DBG("Rotation completed for stream %" PRIu64, | |
521 | stream->stream_handle); | |
522 | stream_complete_rotation(stream); | |
523 | } | |
524 | } | |
525 | ||
526 | end: | |
527 | return ret; | |
528 | } | |
529 | ||
348a81dc JG |
530 | static int stream_set_trace_chunk(struct relay_stream *stream, |
531 | struct lttng_trace_chunk *chunk) | |
532 | { | |
533 | int ret = 0; | |
534 | enum lttng_trace_chunk_status status; | |
535 | bool acquired_reference; | |
c35f9726 | 536 | struct stream_fd *new_stream_fd = NULL; |
348a81dc | 537 | |
348a81dc JG |
538 | status = lttng_trace_chunk_create_subdirectory(chunk, |
539 | stream->path_name); | |
540 | if (status != LTTNG_TRACE_CHUNK_STATUS_OK) { | |
541 | ret = -1; | |
542 | goto end; | |
543 | } | |
544 | ||
545 | lttng_trace_chunk_put(stream->trace_chunk); | |
546 | acquired_reference = lttng_trace_chunk_get(chunk); | |
547 | assert(acquired_reference); | |
548 | stream->trace_chunk = chunk; | |
c35f9726 JG |
549 | |
550 | if (stream->stream_fd) { | |
551 | stream_fd_put(stream->stream_fd); | |
552 | stream->stream_fd = NULL; | |
553 | } | |
554 | ret = stream_create_data_output_file_from_trace_chunk(stream, chunk, | |
555 | false, &new_stream_fd); | |
556 | stream->stream_fd = new_stream_fd; | |
348a81dc | 557 | end: |
348a81dc JG |
558 | return ret; |
559 | } | |
560 | ||
2a174661 | 561 | /* |
7591bab1 | 562 | * We keep ownership of path_name and channel_name. |
2a174661 | 563 | */ |
7591bab1 MD |
564 | struct relay_stream *stream_create(struct ctf_trace *trace, |
565 | uint64_t stream_handle, char *path_name, | |
566 | char *channel_name, uint64_t tracefile_size, | |
348a81dc | 567 | uint64_t tracefile_count) |
2a174661 | 568 | { |
7591bab1 MD |
569 | int ret; |
570 | struct relay_stream *stream = NULL; | |
571 | struct relay_session *session = trace->session; | |
348a81dc JG |
572 | bool acquired_reference = false; |
573 | struct lttng_trace_chunk *current_trace_chunk; | |
2a174661 | 574 | |
7591bab1 MD |
575 | stream = zmalloc(sizeof(struct relay_stream)); |
576 | if (stream == NULL) { | |
577 | PERROR("relay stream zmalloc"); | |
7591bab1 MD |
578 | goto error_no_alloc; |
579 | } | |
2a174661 | 580 | |
7591bab1 | 581 | stream->stream_handle = stream_handle; |
a8f9f353 | 582 | stream->prev_data_seq = -1ULL; |
7a45c7e6 | 583 | stream->prev_index_seq = -1ULL; |
bda7c7b9 | 584 | stream->last_net_seq_num = -1ULL; |
7591bab1 MD |
585 | stream->ctf_stream_id = -1ULL; |
586 | stream->tracefile_size = tracefile_size; | |
587 | stream->tracefile_count = tracefile_count; | |
588 | stream->path_name = path_name; | |
589 | stream->channel_name = channel_name; | |
2f9c3030 | 590 | stream->beacon_ts_end = -1ULL; |
7591bab1 MD |
591 | lttng_ht_node_init_u64(&stream->node, stream->stream_handle); |
592 | pthread_mutex_init(&stream->lock, NULL); | |
7591bab1 MD |
593 | urcu_ref_init(&stream->ref); |
594 | ctf_trace_get(trace); | |
595 | stream->trace = trace; | |
2a174661 | 596 | |
348a81dc JG |
597 | pthread_mutex_lock(&trace->session->lock); |
598 | current_trace_chunk = trace->session->current_trace_chunk; | |
599 | if (current_trace_chunk) { | |
600 | acquired_reference = lttng_trace_chunk_get(current_trace_chunk); | |
601 | } | |
602 | pthread_mutex_unlock(&trace->session->lock); | |
603 | if (!acquired_reference) { | |
604 | ERR("Cannot create stream for channel \"%s\" as a reference to the session's current trace chunk could not be acquired", | |
605 | channel_name); | |
7591bab1 MD |
606 | ret = -1; |
607 | goto end; | |
2a174661 DG |
608 | } |
609 | ||
348a81dc JG |
610 | stream->indexes_ht = lttng_ht_new(0, LTTNG_HT_TYPE_U64); |
611 | if (!stream->indexes_ht) { | |
612 | ERR("Cannot created indexes_ht"); | |
613 | ret = -1; | |
7591bab1 MD |
614 | goto end; |
615 | } | |
2a174661 | 616 | |
c35f9726 | 617 | pthread_mutex_lock(&stream->lock); |
348a81dc | 618 | ret = stream_set_trace_chunk(stream, current_trace_chunk); |
c35f9726 | 619 | pthread_mutex_unlock(&stream->lock); |
348a81dc JG |
620 | if (ret) { |
621 | ERR("Failed to set the current trace chunk of session \"%s\" on newly created stream of channel \"%s\"", | |
622 | trace->session->session_name, | |
623 | stream->channel_name); | |
7591bab1 MD |
624 | ret = -1; |
625 | goto end; | |
2a174661 | 626 | } |
a44ca2ca MD |
627 | stream->tfa = tracefile_array_create(stream->tracefile_count); |
628 | if (!stream->tfa) { | |
629 | ret = -1; | |
630 | goto end; | |
631 | } | |
7591bab1 | 632 | |
348a81dc JG |
633 | stream->is_metadata = !strcmp(stream->channel_name, |
634 | DEFAULT_METADATA_NAME); | |
7591bab1 MD |
635 | stream->in_recv_list = true; |
636 | ||
637 | /* | |
638 | * Add the stream in the recv list of the session. Once the end stream | |
639 | * message is received, all session streams are published. | |
640 | */ | |
641 | pthread_mutex_lock(&session->recv_list_lock); | |
642 | cds_list_add_rcu(&stream->recv_node, &session->recv_list); | |
643 | session->stream_count++; | |
644 | pthread_mutex_unlock(&session->recv_list_lock); | |
645 | ||
646 | /* | |
647 | * Both in the ctf_trace object and the global stream ht since the data | |
648 | * side of the relayd does not have the concept of session. | |
649 | */ | |
650 | lttng_ht_add_unique_u64(relay_streams_ht, &stream->node); | |
77f7bd85 | 651 | stream->in_stream_ht = true; |
2a174661 | 652 | |
7591bab1 MD |
653 | DBG("Relay new stream added %s with ID %" PRIu64, stream->channel_name, |
654 | stream->stream_handle); | |
655 | ret = 0; | |
656 | ||
657 | end: | |
658 | if (ret) { | |
659 | if (stream->stream_fd) { | |
660 | stream_fd_put(stream->stream_fd); | |
661 | stream->stream_fd = NULL; | |
2a174661 | 662 | } |
7591bab1 MD |
663 | stream_put(stream); |
664 | stream = NULL; | |
2a174661 | 665 | } |
317eadef JG |
666 | if (acquired_reference) { |
667 | lttng_trace_chunk_put(current_trace_chunk); | |
668 | } | |
7591bab1 | 669 | return stream; |
2a174661 | 670 | |
7591bab1 MD |
671 | error_no_alloc: |
672 | /* | |
673 | * path_name and channel_name need to be freed explicitly here | |
674 | * because we cannot rely on stream_put(). | |
675 | */ | |
676 | free(path_name); | |
677 | free(channel_name); | |
678 | return NULL; | |
679 | } | |
680 | ||
681 | /* | |
682 | * Called with the session lock held. | |
683 | */ | |
684 | void stream_publish(struct relay_stream *stream) | |
685 | { | |
686 | struct relay_session *session; | |
687 | ||
688 | pthread_mutex_lock(&stream->lock); | |
689 | if (stream->published) { | |
690 | goto unlock; | |
2a174661 DG |
691 | } |
692 | ||
7591bab1 | 693 | session = stream->trace->session; |
2a174661 | 694 | |
7591bab1 MD |
695 | pthread_mutex_lock(&session->recv_list_lock); |
696 | if (stream->in_recv_list) { | |
697 | cds_list_del_rcu(&stream->recv_node); | |
698 | stream->in_recv_list = false; | |
699 | } | |
700 | pthread_mutex_unlock(&session->recv_list_lock); | |
2a174661 | 701 | |
7591bab1 MD |
702 | pthread_mutex_lock(&stream->trace->stream_list_lock); |
703 | cds_list_add_rcu(&stream->stream_node, &stream->trace->stream_list); | |
704 | pthread_mutex_unlock(&stream->trace->stream_list_lock); | |
2a174661 | 705 | |
7591bab1 MD |
706 | stream->published = true; |
707 | unlock: | |
2a174661 | 708 | pthread_mutex_unlock(&stream->lock); |
2a174661 DG |
709 | } |
710 | ||
7591bab1 | 711 | /* |
77f7bd85 | 712 | * Stream must be protected by holding the stream lock or by virtue of being |
ce4d4083 | 713 | * called from stream_destroy. |
7591bab1 MD |
714 | */ |
715 | static void stream_unpublish(struct relay_stream *stream) | |
2a174661 | 716 | { |
77f7bd85 MD |
717 | if (stream->in_stream_ht) { |
718 | struct lttng_ht_iter iter; | |
719 | int ret; | |
720 | ||
721 | iter.iter.node = &stream->node.node; | |
722 | ret = lttng_ht_del(relay_streams_ht, &iter); | |
723 | assert(!ret); | |
724 | stream->in_stream_ht = false; | |
725 | } | |
726 | if (stream->published) { | |
727 | pthread_mutex_lock(&stream->trace->stream_list_lock); | |
728 | cds_list_del_rcu(&stream->stream_node); | |
729 | pthread_mutex_unlock(&stream->trace->stream_list_lock); | |
730 | stream->published = false; | |
7591bab1 | 731 | } |
7591bab1 MD |
732 | } |
733 | ||
734 | static void stream_destroy(struct relay_stream *stream) | |
735 | { | |
736 | if (stream->indexes_ht) { | |
49e614cb MD |
737 | /* |
738 | * Calling lttng_ht_destroy in call_rcu worker thread so | |
739 | * we don't hold the RCU read-side lock while calling | |
740 | * it. | |
741 | */ | |
7591bab1 MD |
742 | lttng_ht_destroy(stream->indexes_ht); |
743 | } | |
a44ca2ca MD |
744 | if (stream->tfa) { |
745 | tracefile_array_destroy(stream->tfa); | |
746 | } | |
7591bab1 MD |
747 | free(stream->path_name); |
748 | free(stream->channel_name); | |
749 | free(stream); | |
750 | } | |
751 | ||
752 | static void stream_destroy_rcu(struct rcu_head *rcu_head) | |
753 | { | |
754 | struct relay_stream *stream = | |
755 | caa_container_of(rcu_head, struct relay_stream, rcu_node); | |
756 | ||
757 | stream_destroy(stream); | |
758 | } | |
759 | ||
760 | /* | |
761 | * No need to take stream->lock since this is only called on the final | |
762 | * stream_put which ensures that a single thread may act on the stream. | |
7591bab1 MD |
763 | */ |
764 | static void stream_release(struct urcu_ref *ref) | |
765 | { | |
766 | struct relay_stream *stream = | |
767 | caa_container_of(ref, struct relay_stream, ref); | |
768 | struct relay_session *session; | |
2a174661 | 769 | |
7591bab1 MD |
770 | session = stream->trace->session; |
771 | ||
772 | DBG("Releasing stream id %" PRIu64, stream->stream_handle); | |
773 | ||
774 | pthread_mutex_lock(&session->recv_list_lock); | |
775 | session->stream_count--; | |
776 | if (stream->in_recv_list) { | |
777 | cds_list_del_rcu(&stream->recv_node); | |
778 | stream->in_recv_list = false; | |
779 | } | |
780 | pthread_mutex_unlock(&session->recv_list_lock); | |
2a174661 | 781 | |
7591bab1 MD |
782 | stream_unpublish(stream); |
783 | ||
784 | if (stream->stream_fd) { | |
785 | stream_fd_put(stream->stream_fd); | |
786 | stream->stream_fd = NULL; | |
787 | } | |
f8f3885c MD |
788 | if (stream->index_file) { |
789 | lttng_index_file_put(stream->index_file); | |
790 | stream->index_file = NULL; | |
7591bab1 MD |
791 | } |
792 | if (stream->trace) { | |
793 | ctf_trace_put(stream->trace); | |
794 | stream->trace = NULL; | |
795 | } | |
c35f9726 | 796 | stream_complete_rotation(stream); |
348a81dc JG |
797 | lttng_trace_chunk_put(stream->trace_chunk); |
798 | stream->trace_chunk = NULL; | |
7591bab1 MD |
799 | |
800 | call_rcu(&stream->rcu_node, stream_destroy_rcu); | |
2a174661 DG |
801 | } |
802 | ||
7591bab1 | 803 | void stream_put(struct relay_stream *stream) |
2a174661 | 804 | { |
7591bab1 | 805 | rcu_read_lock(); |
7591bab1 MD |
806 | assert(stream->ref.refcount != 0); |
807 | /* | |
808 | * Wait until we have processed all the stream packets before | |
809 | * actually putting our last stream reference. | |
810 | */ | |
7591bab1 | 811 | urcu_ref_put(&stream->ref, stream_release); |
7591bab1 MD |
812 | rcu_read_unlock(); |
813 | } | |
814 | ||
c35f9726 JG |
815 | int stream_set_pending_rotation(struct relay_stream *stream, |
816 | struct lttng_trace_chunk *next_trace_chunk, | |
817 | uint64_t rotation_sequence_number) | |
818 | { | |
819 | int ret = 0; | |
820 | const struct relay_stream_rotation rotation = { | |
0f83d1cc MD |
821 | .data_rotated = false, |
822 | .index_rotated = false, | |
823 | .packet_seq_num = rotation_sequence_number, | |
824 | .prev_data_net_seq = -1ULL, | |
c35f9726 JG |
825 | .next_trace_chunk = next_trace_chunk, |
826 | }; | |
827 | ||
828 | if (stream->ongoing_rotation.is_set) { | |
829 | ERR("Attempted to set a pending rotation on a stream already being rotated (protocol error)"); | |
830 | ret = -1; | |
831 | goto end; | |
832 | } | |
833 | ||
834 | if (next_trace_chunk) { | |
835 | const bool reference_acquired = | |
836 | lttng_trace_chunk_get(next_trace_chunk); | |
837 | ||
838 | assert(reference_acquired); | |
839 | } | |
840 | LTTNG_OPTIONAL_SET(&stream->ongoing_rotation, rotation); | |
841 | ||
0f83d1cc MD |
842 | DBG("Setting pending rotation: stream_id = %" PRIu64 |
843 | ", rotate_at_packet_seq_num = %" PRIu64, | |
c35f9726 JG |
844 | stream->stream_handle, rotation_sequence_number); |
845 | if (stream->is_metadata) { | |
846 | /* | |
847 | * A metadata stream has no index; consider it already rotated. | |
848 | */ | |
849 | stream->ongoing_rotation.value.index_rotated = true; | |
850 | ret = stream_rotate_data_file(stream); | |
851 | } else { | |
0f83d1cc | 852 | ret = try_rotate_stream_index(stream); |
c35f9726 JG |
853 | if (ret < 0) { |
854 | goto end; | |
855 | } | |
856 | ||
0f83d1cc | 857 | ret = try_rotate_stream_data(stream); |
c35f9726 JG |
858 | if (ret < 0) { |
859 | goto end; | |
860 | } | |
861 | } | |
862 | end: | |
863 | return ret; | |
864 | } | |
865 | ||
bda7c7b9 | 866 | void try_stream_close(struct relay_stream *stream) |
7591bab1 | 867 | { |
98ba050e JR |
868 | bool session_aborted; |
869 | struct relay_session *session = stream->trace->session; | |
870 | ||
bda7c7b9 | 871 | DBG("Trying to close stream %" PRIu64, stream->stream_handle); |
98ba050e JR |
872 | |
873 | pthread_mutex_lock(&session->lock); | |
874 | session_aborted = session->aborted; | |
875 | pthread_mutex_unlock(&session->lock); | |
876 | ||
7591bab1 | 877 | pthread_mutex_lock(&stream->lock); |
bda7c7b9 JG |
878 | /* |
879 | * Can be called concurently by connection close and reception of last | |
880 | * pending data. | |
881 | */ | |
882 | if (stream->closed) { | |
883 | pthread_mutex_unlock(&stream->lock); | |
884 | DBG("closing stream %" PRIu64 " aborted since it is already marked as closed", stream->stream_handle); | |
885 | return; | |
886 | } | |
887 | ||
888 | stream->close_requested = true; | |
3d07a857 MD |
889 | |
890 | if (stream->last_net_seq_num == -1ULL) { | |
891 | /* | |
892 | * Handle connection close without explicit stream close | |
893 | * command. | |
894 | * | |
895 | * We can be clever about indexes partially received in | |
896 | * cases where we received the data socket part, but not | |
897 | * the control socket part: since we're currently closing | |
898 | * the stream on behalf of the control socket, we *know* | |
899 | * there won't be any more control information for this | |
900 | * socket. Therefore, we can destroy all indexes for | |
901 | * which we have received only the file descriptor (from | |
902 | * data socket). This takes care of consumerd crashes | |
903 | * between sending the data and control information for | |
904 | * a packet. Since those are sent in that order, we take | |
905 | * care of consumerd crashes. | |
906 | */ | |
5312a3ed | 907 | DBG("relay_index_close_partial_fd"); |
3d07a857 MD |
908 | relay_index_close_partial_fd(stream); |
909 | /* | |
910 | * Use the highest net_seq_num we currently have pending | |
911 | * As end of stream indicator. Leave last_net_seq_num | |
912 | * at -1ULL if we cannot find any index. | |
913 | */ | |
914 | stream->last_net_seq_num = relay_index_find_last(stream); | |
5312a3ed | 915 | DBG("Updating stream->last_net_seq_num to %" PRIu64, stream->last_net_seq_num); |
3d07a857 MD |
916 | /* Fall-through into the next check. */ |
917 | } | |
918 | ||
bda7c7b9 | 919 | if (stream->last_net_seq_num != -1ULL && |
a8f9f353 | 920 | ((int64_t) (stream->prev_data_seq - stream->last_net_seq_num)) < 0 |
98ba050e | 921 | && !session_aborted) { |
3d07a857 MD |
922 | /* |
923 | * Don't close since we still have data pending. This | |
924 | * handles cases where an explicit close command has | |
925 | * been received for this stream, and cases where the | |
926 | * connection has been closed, and we are awaiting for | |
927 | * index information from the data socket. It is | |
928 | * therefore expected that all the index fd information | |
929 | * we need has already been received on the control | |
930 | * socket. Matching index information from data socket | |
931 | * should be Expected Soon(TM). | |
932 | * | |
933 | * TODO: We should implement a timer to garbage collect | |
934 | * streams after a timeout to be resilient against a | |
935 | * consumerd implementation that would not match this | |
936 | * expected behavior. | |
937 | */ | |
bda7c7b9 JG |
938 | pthread_mutex_unlock(&stream->lock); |
939 | DBG("closing stream %" PRIu64 " aborted since it still has data pending", stream->stream_handle); | |
940 | return; | |
941 | } | |
3d07a857 MD |
942 | /* |
943 | * We received all the indexes we can expect. | |
944 | */ | |
77f7bd85 | 945 | stream_unpublish(stream); |
2229a09c | 946 | stream->closed = true; |
bda7c7b9 | 947 | /* Relay indexes are only used by the "consumer/sessiond" end. */ |
7591bab1 | 948 | relay_index_close_all(stream); |
d91bc249 MD |
949 | |
950 | /* | |
951 | * If we are closed by an application exiting (per-pid buffers), | |
952 | * we need to put our reference on the stream trace chunk right | |
953 | * away, because otherwise still holding the reference on the | |
954 | * trace chunk could allow a viewer stream (which holds a reference | |
955 | * to the stream) to postpone destroy waiting for the chunk to cease | |
956 | * to exist endlessly until the viewer is detached. | |
957 | */ | |
958 | ||
959 | /* Put stream fd before put chunk. */ | |
960 | if (stream->stream_fd) { | |
961 | stream_fd_put(stream->stream_fd); | |
962 | stream->stream_fd = NULL; | |
963 | } | |
964 | if (stream->index_file) { | |
965 | lttng_index_file_put(stream->index_file); | |
966 | stream->index_file = NULL; | |
967 | } | |
968 | lttng_trace_chunk_put(stream->trace_chunk); | |
969 | stream->trace_chunk = NULL; | |
7591bab1 | 970 | pthread_mutex_unlock(&stream->lock); |
bda7c7b9 | 971 | DBG("Succeeded in closing stream %" PRIu64, stream->stream_handle); |
7591bab1 MD |
972 | stream_put(stream); |
973 | } | |
974 | ||
c35f9726 JG |
975 | int stream_init_packet(struct relay_stream *stream, size_t packet_size, |
976 | bool *file_rotated) | |
977 | { | |
978 | int ret = 0; | |
979 | ||
980 | ASSERT_LOCKED(stream->lock); | |
1ad1103b JG |
981 | |
982 | if (!stream->stream_fd || !stream->trace_chunk) { | |
983 | ERR("Protocol error: received a packet for a stream that doesn't have a current trace chunk: stream_id = %" PRIu64 ", channel_name = %s", | |
984 | stream->stream_handle, stream->channel_name); | |
985 | ret = -1; | |
986 | goto end; | |
987 | } | |
988 | ||
c35f9726 JG |
989 | if (caa_likely(stream->tracefile_size == 0)) { |
990 | /* No size limit set; nothing to check. */ | |
991 | goto end; | |
992 | } | |
993 | ||
994 | /* | |
995 | * Check if writing the new packet would exceed the maximal file size. | |
996 | */ | |
997 | if (caa_unlikely((stream->tracefile_size_current + packet_size) > | |
998 | stream->tracefile_size)) { | |
999 | const uint64_t new_file_index = | |
1000 | (stream->tracefile_current_index + 1) % | |
1001 | stream->tracefile_count; | |
1002 | ||
1003 | if (new_file_index < stream->tracefile_current_index) { | |
1004 | stream->tracefile_wrapped_around = true; | |
1005 | } | |
1006 | DBG("New stream packet causes stream file rotation: stream_id = %" PRIu64 | |
1007 | ", current_file_size = %" PRIu64 | |
76ee9245 | 1008 | ", packet_size = %zu, current_file_index = %" PRIu64 |
c35f9726 JG |
1009 | " new_file_index = %" PRIu64, |
1010 | stream->stream_handle, | |
1011 | stream->tracefile_size_current, packet_size, | |
1012 | stream->tracefile_current_index, new_file_index); | |
78118e3b | 1013 | tracefile_array_file_rotate(stream->tfa, TRACEFILE_ROTATE_WRITE); |
c35f9726 JG |
1014 | stream->tracefile_current_index = new_file_index; |
1015 | ||
1016 | if (stream->stream_fd) { | |
1017 | stream_fd_put(stream->stream_fd); | |
1018 | stream->stream_fd = NULL; | |
1019 | } | |
1020 | ret = stream_create_data_output_file_from_trace_chunk(stream, | |
1021 | stream->trace_chunk, false, &stream->stream_fd); | |
1022 | if (ret) { | |
1023 | ERR("Failed to perform trace file rotation of stream %" PRIu64, | |
1024 | stream->stream_handle); | |
1025 | goto end; | |
1026 | } | |
1027 | ||
1028 | /* | |
1029 | * Reset current size because we just performed a stream | |
1030 | * rotation. | |
1031 | */ | |
1032 | stream->tracefile_size_current = 0; | |
1033 | *file_rotated = true; | |
1034 | } else { | |
1035 | *file_rotated = false; | |
1036 | } | |
1037 | end: | |
1038 | return ret; | |
1039 | } | |
1040 | ||
1041 | /* Note that the packet is not necessarily complete. */ | |
1042 | int stream_write(struct relay_stream *stream, | |
1043 | const struct lttng_buffer_view *packet, size_t padding_len) | |
1044 | { | |
1045 | int ret = 0; | |
1046 | ssize_t write_ret; | |
1047 | size_t padding_to_write = padding_len; | |
1048 | char padding_buffer[FILE_IO_STACK_BUFFER_SIZE]; | |
1049 | ||
1050 | ASSERT_LOCKED(stream->lock); | |
1051 | memset(padding_buffer, 0, | |
1052 | min(sizeof(padding_buffer), padding_to_write)); | |
1053 | ||
1ad1103b JG |
1054 | if (!stream->stream_fd || !stream->trace_chunk) { |
1055 | ERR("Protocol error: received a packet for a stream that doesn't have a current trace chunk: stream_id = %" PRIu64 ", channel_name = %s", | |
1056 | stream->stream_handle, stream->channel_name); | |
1057 | ret = -1; | |
1058 | goto end; | |
1059 | } | |
c35f9726 JG |
1060 | if (packet) { |
1061 | write_ret = lttng_write(stream->stream_fd->fd, | |
1062 | packet->data, packet->size); | |
1063 | if (write_ret != packet->size) { | |
1064 | PERROR("Failed to write to stream file of %sstream %" PRIu64, | |
1065 | stream->is_metadata ? "metadata " : "", | |
1066 | stream->stream_handle); | |
1067 | ret = -1; | |
1068 | goto end; | |
1069 | } | |
1070 | } | |
1071 | ||
1072 | while (padding_to_write > 0) { | |
1073 | const size_t padding_to_write_this_pass = | |
1074 | min(padding_to_write, sizeof(padding_buffer)); | |
1075 | ||
1076 | write_ret = lttng_write(stream->stream_fd->fd, | |
1077 | padding_buffer, padding_to_write_this_pass); | |
1078 | if (write_ret != padding_to_write_this_pass) { | |
1079 | PERROR("Failed to write padding to file of %sstream %" PRIu64, | |
1080 | stream->is_metadata ? "metadata " : "", | |
1081 | stream->stream_handle); | |
1082 | ret = -1; | |
1083 | goto end; | |
1084 | } | |
1085 | padding_to_write -= padding_to_write_this_pass; | |
1086 | } | |
1087 | ||
1088 | if (stream->is_metadata) { | |
94f73d08 MD |
1089 | size_t recv_len; |
1090 | ||
1091 | recv_len = packet ? packet->size : 0; | |
1092 | recv_len += padding_len; | |
1093 | stream->metadata_received += recv_len; | |
1094 | if (recv_len) { | |
1095 | stream->no_new_metadata_notified = false; | |
1096 | } | |
c35f9726 JG |
1097 | } |
1098 | ||
8c865d87 | 1099 | DBG("Wrote to %sstream %" PRIu64 ": data_length = %zu, padding_length = %zu", |
c35f9726 JG |
1100 | stream->is_metadata ? "metadata " : "", |
1101 | stream->stream_handle, | |
8c865d87 | 1102 | packet ? packet->size : (size_t) 0, padding_len); |
c35f9726 JG |
1103 | end: |
1104 | return ret; | |
1105 | } | |
1106 | ||
1107 | /* | |
1108 | * Update index after receiving a packet for a data stream. | |
1109 | * | |
1110 | * Called with the stream lock held. | |
1111 | * | |
1112 | * Return 0 on success else a negative value. | |
1113 | */ | |
1114 | int stream_update_index(struct relay_stream *stream, uint64_t net_seq_num, | |
1115 | bool rotate_index, bool *flushed, uint64_t total_size) | |
1116 | { | |
1117 | int ret = 0; | |
1118 | uint64_t data_offset; | |
1119 | struct relay_index *index; | |
1120 | ||
92761772 | 1121 | assert(stream->trace_chunk); |
c35f9726 JG |
1122 | ASSERT_LOCKED(stream->lock); |
1123 | /* Get data offset because we are about to update the index. */ | |
1124 | data_offset = htobe64(stream->tracefile_size_current); | |
1125 | ||
1126 | DBG("handle_index_data: stream %" PRIu64 " net_seq_num %" PRIu64 " data offset %" PRIu64, | |
1127 | stream->stream_handle, net_seq_num, stream->tracefile_size_current); | |
1128 | ||
1129 | /* | |
1130 | * Lookup for an existing index for that stream id/sequence | |
1131 | * number. If it exists, the control thread has already received the | |
1132 | * data for it, thus we need to write it to disk. | |
1133 | */ | |
1134 | index = relay_index_get_by_id_or_create(stream, net_seq_num); | |
1135 | if (!index) { | |
1136 | ret = -1; | |
1137 | goto end; | |
1138 | } | |
1139 | ||
1140 | if (rotate_index || !stream->index_file) { | |
1141 | ret = create_index_file(stream, stream->trace_chunk); | |
1142 | if (ret) { | |
1143 | ERR("Failed to create index file for stream %" PRIu64, | |
1144 | stream->stream_handle); | |
1145 | /* Put self-ref for this index due to error. */ | |
1146 | relay_index_put(index); | |
1147 | index = NULL; | |
1148 | goto end; | |
1149 | } | |
1150 | } | |
1151 | ||
1152 | if (relay_index_set_file(index, stream->index_file, data_offset)) { | |
1153 | ret = -1; | |
1154 | /* Put self-ref for this index due to error. */ | |
1155 | relay_index_put(index); | |
1156 | index = NULL; | |
1157 | goto end; | |
1158 | } | |
1159 | ||
1160 | ret = relay_index_try_flush(index); | |
1161 | if (ret == 0) { | |
78118e3b | 1162 | tracefile_array_file_rotate(stream->tfa, TRACEFILE_ROTATE_READ); |
62f6e9ef | 1163 | tracefile_array_commit_seq(stream->tfa, stream->index_received_seqcount); |
c35f9726 | 1164 | stream->index_received_seqcount++; |
0f83d1cc MD |
1165 | LTTNG_OPTIONAL_SET(&stream->received_packet_seq_num, |
1166 | be64toh(index->index_data.packet_seq_num)); | |
c35f9726 JG |
1167 | *flushed = true; |
1168 | } else if (ret > 0) { | |
1169 | index->total_size = total_size; | |
1170 | /* No flush. */ | |
1171 | ret = 0; | |
1172 | } else { | |
1173 | /* | |
1174 | * ret < 0 | |
1175 | * | |
1176 | * relay_index_try_flush is responsible for the self-reference | |
1177 | * put of the index object on error. | |
1178 | */ | |
1179 | ERR("relay_index_try_flush error %d", ret); | |
1180 | ret = -1; | |
1181 | } | |
1182 | end: | |
1183 | return ret; | |
1184 | } | |
1185 | ||
1186 | int stream_complete_packet(struct relay_stream *stream, size_t packet_total_size, | |
1187 | uint64_t sequence_number, bool index_flushed) | |
1188 | { | |
1189 | int ret = 0; | |
1190 | ||
1191 | ASSERT_LOCKED(stream->lock); | |
1192 | ||
1193 | stream->tracefile_size_current += packet_total_size; | |
1194 | if (index_flushed) { | |
1195 | stream->pos_after_last_complete_data_index = | |
1196 | stream->tracefile_size_current; | |
1197 | stream->prev_index_seq = sequence_number; | |
1198 | ret = try_rotate_stream_index(stream); | |
1199 | if (ret < 0) { | |
1200 | goto end; | |
1201 | } | |
1202 | } | |
1203 | ||
1204 | stream->prev_data_seq = sequence_number; | |
1205 | ret = try_rotate_stream_data(stream); | |
d2ec9b88 | 1206 | |
c35f9726 JG |
1207 | end: |
1208 | return ret; | |
1209 | } | |
1210 | ||
1211 | int stream_add_index(struct relay_stream *stream, | |
1212 | const struct lttcomm_relayd_index *index_info) | |
1213 | { | |
1214 | int ret = 0; | |
1215 | struct relay_index *index; | |
1216 | ||
1217 | ASSERT_LOCKED(stream->lock); | |
1218 | ||
1219 | /* Live beacon handling */ | |
1220 | if (index_info->packet_size == 0) { | |
1221 | DBG("Received live beacon for stream %" PRIu64, | |
1222 | stream->stream_handle); | |
1223 | ||
1224 | /* | |
1225 | * Only flag a stream inactive when it has already | |
1226 | * received data and no indexes are in flight. | |
1227 | */ | |
1228 | if (stream->index_received_seqcount > 0 | |
1229 | && stream->indexes_in_flight == 0) { | |
1230 | stream->beacon_ts_end = index_info->timestamp_end; | |
1231 | } | |
1232 | ret = 0; | |
1233 | goto end; | |
1234 | } else { | |
1235 | stream->beacon_ts_end = -1ULL; | |
1236 | } | |
1237 | ||
1238 | if (stream->ctf_stream_id == -1ULL) { | |
1239 | stream->ctf_stream_id = index_info->stream_id; | |
1240 | } | |
1241 | ||
1242 | index = relay_index_get_by_id_or_create(stream, index_info->net_seq_num); | |
1243 | if (!index) { | |
1244 | ret = -1; | |
1245 | ERR("Failed to get or create index %" PRIu64, | |
1246 | index_info->net_seq_num); | |
1247 | goto end; | |
1248 | } | |
1249 | if (relay_index_set_control_data(index, index_info, | |
1250 | stream->trace->session->minor)) { | |
1251 | ERR("set_index_control_data error"); | |
1252 | relay_index_put(index); | |
1253 | ret = -1; | |
1254 | goto end; | |
1255 | } | |
1256 | ret = relay_index_try_flush(index); | |
1257 | if (ret == 0) { | |
78118e3b | 1258 | tracefile_array_file_rotate(stream->tfa, TRACEFILE_ROTATE_READ); |
62f6e9ef | 1259 | tracefile_array_commit_seq(stream->tfa, stream->index_received_seqcount); |
c35f9726 JG |
1260 | stream->index_received_seqcount++; |
1261 | stream->pos_after_last_complete_data_index += index->total_size; | |
1262 | stream->prev_index_seq = index_info->net_seq_num; | |
0f83d1cc MD |
1263 | LTTNG_OPTIONAL_SET(&stream->received_packet_seq_num, |
1264 | index_info->packet_seq_num); | |
c35f9726 JG |
1265 | |
1266 | ret = try_rotate_stream_index(stream); | |
1267 | if (ret < 0) { | |
1268 | goto end; | |
1269 | } | |
0f83d1cc MD |
1270 | ret = try_rotate_stream_data(stream); |
1271 | if (ret < 0) { | |
1272 | goto end; | |
1273 | } | |
c35f9726 JG |
1274 | } else if (ret > 0) { |
1275 | /* no flush. */ | |
1276 | ret = 0; | |
1277 | } else { | |
1278 | /* | |
1279 | * ret < 0 | |
1280 | * | |
1281 | * relay_index_try_flush is responsible for the self-reference | |
1282 | * put of the index object on error. | |
1283 | */ | |
1284 | ERR("relay_index_try_flush error %d", ret); | |
1285 | ret = -1; | |
1286 | } | |
1287 | end: | |
1288 | return ret; | |
1289 | } | |
1290 | ||
da412cde MD |
1291 | static void print_stream_indexes(struct relay_stream *stream) |
1292 | { | |
1293 | struct lttng_ht_iter iter; | |
1294 | struct relay_index *index; | |
1295 | ||
1296 | rcu_read_lock(); | |
1297 | cds_lfht_for_each_entry(stream->indexes_ht->ht, &iter.iter, index, | |
1298 | index_n.node) { | |
1299 | DBG("index %p net_seq_num %" PRIu64 " refcount %ld" | |
1300 | " stream %" PRIu64 " trace %" PRIu64 | |
1301 | " session %" PRIu64, | |
1302 | index, | |
1303 | index->index_n.key, | |
1304 | stream->ref.refcount, | |
1305 | index->stream->stream_handle, | |
1306 | index->stream->trace->id, | |
1307 | index->stream->trace->session->id); | |
1308 | } | |
1309 | rcu_read_unlock(); | |
1310 | } | |
1311 | ||
c35f9726 JG |
1312 | int stream_reset_file(struct relay_stream *stream) |
1313 | { | |
1314 | ASSERT_LOCKED(stream->lock); | |
1315 | ||
1316 | if (stream->stream_fd) { | |
1317 | stream_fd_put(stream->stream_fd); | |
1318 | stream->stream_fd = NULL; | |
1319 | } | |
1320 | ||
1321 | stream->tracefile_size_current = 0; | |
1322 | stream->prev_data_seq = 0; | |
1323 | stream->prev_index_seq = 0; | |
1324 | /* Note that this does not reset the tracefile array. */ | |
1325 | stream->tracefile_current_index = 0; | |
1326 | stream->pos_after_last_complete_data_index = 0; | |
1327 | ||
1328 | return stream_create_data_output_file_from_trace_chunk(stream, | |
1329 | stream->trace_chunk, true, &stream->stream_fd); | |
1330 | } | |
1331 | ||
7591bab1 MD |
1332 | void print_relay_streams(void) |
1333 | { | |
1334 | struct lttng_ht_iter iter; | |
1335 | struct relay_stream *stream; | |
1336 | ||
ce3f3ba3 JG |
1337 | if (!relay_streams_ht) { |
1338 | return; | |
1339 | } | |
1340 | ||
7591bab1 MD |
1341 | rcu_read_lock(); |
1342 | cds_lfht_for_each_entry(relay_streams_ht->ht, &iter.iter, stream, | |
1343 | node.node) { | |
1344 | if (!stream_get(stream)) { | |
1345 | continue; | |
1346 | } | |
1347 | DBG("stream %p refcount %ld stream %" PRIu64 " trace %" PRIu64 | |
1348 | " session %" PRIu64, | |
1349 | stream, | |
1350 | stream->ref.refcount, | |
1351 | stream->stream_handle, | |
1352 | stream->trace->id, | |
1353 | stream->trace->session->id); | |
da412cde | 1354 | print_stream_indexes(stream); |
7591bab1 MD |
1355 | stream_put(stream); |
1356 | } | |
1357 | rcu_read_unlock(); | |
2a174661 | 1358 | } |