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( |
3ff5c5db | 126 | trace_chunk, stream_path, flags, mode, &fd, false); |
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 | ||
68c40154 MD |
149 | DBG("Rotating stream %" PRIu64 " data file with size %" PRIu64, |
150 | stream->stream_handle, stream->tracefile_size_current); | |
c35f9726 JG |
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 | } | |
68c40154 MD |
182 | DBG("%s: reset tracefile_size_current for stream %" PRIu64 " was %" PRIu64, |
183 | __func__, stream->stream_handle, stream->tracefile_size_current); | |
c35f9726 JG |
184 | stream->tracefile_size_current = 0; |
185 | stream->pos_after_last_complete_data_index = 0; | |
186 | stream->ongoing_rotation.value.data_rotated = true; | |
187 | ||
188 | if (stream->ongoing_rotation.value.index_rotated) { | |
189 | /* Rotation completed; reset its state. */ | |
190 | stream_complete_rotation(stream); | |
191 | } | |
192 | end: | |
193 | return ret; | |
194 | } | |
195 | ||
f2aea36d JG |
196 | /* |
197 | * If too much data has been written in a tracefile before we received the | |
198 | * rotation command, we have to move the excess data to the new tracefile and | |
199 | * perform the rotation. This can happen because the control and data | |
200 | * connections are separate, the indexes as well as the commands arrive from | |
201 | * the control connection and we have no control over the order so we could be | |
202 | * in a situation where too much data has been received on the data connection | |
203 | * before the rotation command on the control connection arrives. | |
204 | */ | |
205 | static int rotate_truncate_stream(struct relay_stream *stream) | |
206 | { | |
207 | int ret; | |
208 | off_t lseek_ret, previous_stream_copy_origin; | |
209 | uint64_t copy_bytes_left, misplaced_data_size; | |
210 | bool acquired_reference; | |
211 | struct stream_fd *previous_stream_fd = NULL; | |
212 | struct lttng_trace_chunk *previous_chunk = NULL; | |
213 | ||
f3fe2a92 | 214 | if (!LTTNG_OPTIONAL_GET(stream->ongoing_rotation).next_trace_chunk) { |
4147107d JG |
215 | ERR("Protocol error encoutered in %s(): stream rotation " |
216 | "sequence number is before the current sequence number " | |
217 | "and the next trace chunk is unset. Honoring this " | |
218 | "rotation command would result in data loss", | |
219 | __FUNCTION__); | |
220 | ret = -1; | |
221 | goto end; | |
222 | } | |
223 | ||
f2aea36d JG |
224 | ASSERT_LOCKED(stream->lock); |
225 | /* | |
226 | * Acquire a reference to the current trace chunk to ensure | |
227 | * it is not reclaimed when `stream_rotate_data_file` is called. | |
228 | * Failing to do so would violate the contract of the trace | |
229 | * chunk API as an active file descriptor would outlive the | |
230 | * trace chunk. | |
231 | */ | |
232 | acquired_reference = lttng_trace_chunk_get(stream->trace_chunk); | |
233 | assert(acquired_reference); | |
234 | previous_chunk = stream->trace_chunk; | |
235 | ||
236 | /* | |
237 | * Steal the stream's reference to its stream_fd. A new | |
238 | * stream_fd will be created when the rotation completes and | |
239 | * the orinal stream_fd will be used to copy the "extra" data | |
240 | * to the new file. | |
241 | */ | |
242 | assert(stream->stream_fd); | |
243 | previous_stream_fd = stream->stream_fd; | |
244 | stream->stream_fd = NULL; | |
245 | ||
246 | assert(!stream->is_metadata); | |
247 | assert(stream->tracefile_size_current > | |
248 | stream->pos_after_last_complete_data_index); | |
249 | misplaced_data_size = stream->tracefile_size_current - | |
250 | stream->pos_after_last_complete_data_index; | |
251 | copy_bytes_left = misplaced_data_size; | |
252 | previous_stream_copy_origin = stream->pos_after_last_complete_data_index; | |
253 | ||
254 | ret = stream_rotate_data_file(stream); | |
255 | if (ret) { | |
256 | goto end; | |
257 | } | |
258 | ||
4147107d | 259 | assert(stream->stream_fd); |
f2aea36d JG |
260 | /* |
261 | * Seek the current tracefile to the position at which the rotation | |
262 | * should have occurred. | |
263 | */ | |
264 | lseek_ret = lseek(previous_stream_fd->fd, previous_stream_copy_origin, | |
265 | SEEK_SET); | |
266 | if (lseek_ret < 0) { | |
267 | PERROR("Failed to seek to offset %" PRIu64 | |
268 | " while copying extra data received before a stream rotation", | |
269 | (uint64_t) previous_stream_copy_origin); | |
270 | ret = -1; | |
271 | goto end; | |
272 | } | |
273 | ||
274 | /* Move data from the old file to the new file. */ | |
275 | while (copy_bytes_left) { | |
276 | ssize_t io_ret; | |
277 | char copy_buffer[FILE_IO_STACK_BUFFER_SIZE]; | |
278 | const off_t copy_size_this_pass = min_t( | |
279 | off_t, copy_bytes_left, sizeof(copy_buffer)); | |
280 | ||
281 | io_ret = lttng_read(previous_stream_fd->fd, copy_buffer, | |
282 | copy_size_this_pass); | |
283 | if (io_ret < (ssize_t) copy_size_this_pass) { | |
284 | if (io_ret == -1) { | |
285 | PERROR("Failed to read %" PRIu64 | |
286 | " bytes from fd %i in %s(), returned %zi", | |
287 | copy_size_this_pass, | |
288 | previous_stream_fd->fd, | |
289 | __FUNCTION__, io_ret); | |
290 | } else { | |
291 | ERR("Failed to read %" PRIu64 | |
292 | " bytes from fd %i in %s(), returned %zi", | |
293 | copy_size_this_pass, | |
294 | previous_stream_fd->fd, | |
295 | __FUNCTION__, io_ret); | |
296 | } | |
297 | ret = -1; | |
298 | goto end; | |
299 | } | |
300 | ||
301 | io_ret = lttng_write(stream->stream_fd->fd, copy_buffer, | |
302 | copy_size_this_pass); | |
303 | if (io_ret < (ssize_t) copy_size_this_pass) { | |
304 | if (io_ret == -1) { | |
305 | PERROR("Failed to write %" PRIu64 | |
306 | " bytes from fd %i in %s(), returned %zi", | |
307 | copy_size_this_pass, | |
308 | stream->stream_fd->fd, | |
309 | __FUNCTION__, io_ret); | |
310 | } else { | |
311 | ERR("Failed to write %" PRIu64 | |
312 | " bytes from fd %i in %s(), returned %zi", | |
313 | copy_size_this_pass, | |
314 | stream->stream_fd->fd, | |
315 | __FUNCTION__, io_ret); | |
316 | } | |
317 | ret = -1; | |
318 | goto end; | |
319 | } | |
320 | copy_bytes_left -= copy_size_this_pass; | |
321 | } | |
322 | ||
323 | /* Truncate the file to get rid of the excess data. */ | |
324 | ret = ftruncate(previous_stream_fd->fd, previous_stream_copy_origin); | |
325 | if (ret) { | |
326 | PERROR("Failed to truncate current stream file to offset %" PRIu64, | |
327 | previous_stream_copy_origin); | |
328 | goto end; | |
329 | } | |
330 | ||
331 | /* | |
332 | * Update the offset and FD of all the eventual indexes created by the | |
333 | * data connection before the rotation command arrived. | |
334 | */ | |
335 | ret = relay_index_switch_all_files(stream); | |
336 | if (ret < 0) { | |
337 | ERR("Failed to rotate index file"); | |
338 | goto end; | |
339 | } | |
340 | ||
341 | stream->tracefile_size_current = misplaced_data_size; | |
342 | /* Index and data contents are back in sync. */ | |
343 | stream->pos_after_last_complete_data_index = 0; | |
344 | ret = 0; | |
345 | end: | |
346 | lttng_trace_chunk_put(previous_chunk); | |
347 | stream_fd_put(previous_stream_fd); | |
348 | return ret; | |
349 | } | |
350 | ||
c35f9726 JG |
351 | /* |
352 | * Check if a stream's data file (as opposed to index) should be rotated | |
353 | * (for session rotation). | |
354 | * Must be called with the stream lock held. | |
355 | * | |
356 | * Return 0 on success, a negative value on error. | |
357 | */ | |
358 | static int try_rotate_stream_data(struct relay_stream *stream) | |
359 | { | |
360 | int ret = 0; | |
361 | ||
362 | if (caa_likely(!stream->ongoing_rotation.is_set)) { | |
363 | /* No rotation expected. */ | |
364 | goto end; | |
365 | } | |
366 | ||
367 | if (stream->ongoing_rotation.value.data_rotated) { | |
368 | /* Rotation of the data file has already occurred. */ | |
369 | goto end; | |
370 | } | |
371 | ||
68c40154 MD |
372 | DBG("%s: Stream %" PRIu64 |
373 | " (rotate_at_index_packet_seq_num = %" PRIu64 | |
374 | ", rotate_at_prev_data_net_seq = %" PRIu64 | |
375 | ", prev_data_seq = %" PRIu64 ")", | |
376 | __func__, stream->stream_handle, | |
377 | stream->ongoing_rotation.value.packet_seq_num, | |
378 | stream->ongoing_rotation.value.prev_data_net_seq, | |
379 | stream->prev_data_seq); | |
380 | ||
c35f9726 | 381 | if (stream->prev_data_seq == -1ULL || |
0f83d1cc MD |
382 | stream->ongoing_rotation.value.prev_data_net_seq == -1ULL || |
383 | stream->prev_data_seq < | |
384 | stream->ongoing_rotation.value.prev_data_net_seq) { | |
c35f9726 JG |
385 | /* |
386 | * The next packet that will be written is not part of the next | |
387 | * chunk yet. | |
388 | */ | |
0f83d1cc MD |
389 | DBG("Stream %" PRIu64 " data not yet ready for rotation " |
390 | "(rotate_at_index_packet_seq_num = %" PRIu64 | |
391 | ", rotate_at_prev_data_net_seq = %" PRIu64 | |
c35f9726 JG |
392 | ", prev_data_seq = %" PRIu64 ")", |
393 | stream->stream_handle, | |
0f83d1cc MD |
394 | stream->ongoing_rotation.value.packet_seq_num, |
395 | stream->ongoing_rotation.value.prev_data_net_seq, | |
c35f9726 JG |
396 | stream->prev_data_seq); |
397 | goto end; | |
0f83d1cc | 398 | } else if (stream->prev_data_seq > stream->ongoing_rotation.value.prev_data_net_seq) { |
c35f9726 JG |
399 | /* |
400 | * prev_data_seq is checked here since indexes and rotation | |
401 | * commands are serialized with respect to each other. | |
402 | */ | |
403 | DBG("Rotation after too much data has been written in tracefile " | |
404 | "for stream %" PRIu64 ", need to truncate before " | |
405 | "rotating", stream->stream_handle); | |
406 | ret = rotate_truncate_stream(stream); | |
407 | if (ret) { | |
408 | ERR("Failed to truncate stream"); | |
409 | goto end; | |
410 | } | |
411 | } else { | |
412 | ret = stream_rotate_data_file(stream); | |
413 | } | |
414 | ||
415 | end: | |
416 | return ret; | |
417 | } | |
418 | ||
419 | /* | |
420 | * Close the current index file if it is open, and create a new one. | |
421 | * | |
422 | * Return 0 on success, -1 on error. | |
423 | */ | |
424 | static int create_index_file(struct relay_stream *stream, | |
425 | struct lttng_trace_chunk *chunk) | |
426 | { | |
427 | int ret; | |
428 | uint32_t major, minor; | |
429 | char *index_subpath = NULL; | |
3a735fa7 | 430 | enum lttng_trace_chunk_status status; |
c35f9726 JG |
431 | |
432 | ASSERT_LOCKED(stream->lock); | |
433 | ||
434 | /* Put ref on previous index_file. */ | |
435 | if (stream->index_file) { | |
436 | lttng_index_file_put(stream->index_file); | |
437 | stream->index_file = NULL; | |
438 | } | |
439 | major = stream->trace->session->major; | |
440 | minor = stream->trace->session->minor; | |
441 | ||
442 | if (!chunk) { | |
443 | ret = 0; | |
444 | goto end; | |
445 | } | |
446 | ret = asprintf(&index_subpath, "%s/%s", stream->path_name, | |
447 | DEFAULT_INDEX_DIR); | |
448 | if (ret < 0) { | |
449 | goto end; | |
450 | } | |
451 | ||
3a735fa7 | 452 | status = lttng_trace_chunk_create_subdirectory(chunk, |
c35f9726 JG |
453 | index_subpath); |
454 | free(index_subpath); | |
3a735fa7 MD |
455 | if (status != LTTNG_TRACE_CHUNK_STATUS_OK) { |
456 | ret = -1; | |
c35f9726 JG |
457 | goto end; |
458 | } | |
3ff5c5db | 459 | status = lttng_index_file_create_from_trace_chunk( |
c35f9726 JG |
460 | chunk, stream->path_name, |
461 | stream->channel_name, stream->tracefile_size, | |
462 | stream->tracefile_current_index, | |
463 | lttng_to_index_major(major, minor), | |
3ff5c5db MD |
464 | lttng_to_index_minor(major, minor), true, |
465 | &stream->index_file); | |
466 | if (status != LTTNG_TRACE_CHUNK_STATUS_OK) { | |
c35f9726 JG |
467 | ret = -1; |
468 | goto end; | |
469 | } | |
470 | ||
471 | ret = 0; | |
472 | ||
473 | end: | |
474 | return ret; | |
475 | } | |
476 | ||
477 | /* | |
478 | * Check if a stream's index file should be rotated (for session rotation). | |
479 | * Must be called with the stream lock held. | |
480 | * | |
481 | * Return 0 on success, a negative value on error. | |
482 | */ | |
483 | static int try_rotate_stream_index(struct relay_stream *stream) | |
484 | { | |
485 | int ret = 0; | |
486 | ||
487 | if (!stream->ongoing_rotation.is_set) { | |
488 | /* No rotation expected. */ | |
489 | goto end; | |
490 | } | |
491 | ||
492 | if (stream->ongoing_rotation.value.index_rotated) { | |
493 | /* Rotation of the index has already occurred. */ | |
494 | goto end; | |
495 | } | |
496 | ||
68c40154 MD |
497 | DBG("%s: Stream %" PRIu64 |
498 | " (rotate_at_packet_seq_num = %" PRIu64 | |
499 | ", received_packet_seq_num = " | |
500 | "(value = %" PRIu64 ", is_set = %" PRIu8 "))", | |
501 | __func__, stream->stream_handle, | |
502 | stream->ongoing_rotation.value.packet_seq_num, | |
503 | stream->received_packet_seq_num.value, | |
504 | stream->received_packet_seq_num.is_set); | |
505 | ||
0f83d1cc MD |
506 | if (!stream->received_packet_seq_num.is_set || |
507 | LTTNG_OPTIONAL_GET(stream->received_packet_seq_num) + 1 < | |
508 | stream->ongoing_rotation.value.packet_seq_num) { | |
509 | DBG("Stream %" PRIu64 " index not yet ready for rotation " | |
510 | "(rotate_at_packet_seq_num = %" PRIu64 | |
511 | ", received_packet_seq_num = " | |
512 | "(value = %" PRIu64 ", is_set = %" PRIu8 "))", | |
c35f9726 | 513 | stream->stream_handle, |
0f83d1cc MD |
514 | stream->ongoing_rotation.value.packet_seq_num, |
515 | stream->received_packet_seq_num.value, | |
516 | stream->received_packet_seq_num.is_set); | |
c35f9726 JG |
517 | goto end; |
518 | } else { | |
0f83d1cc MD |
519 | /* |
520 | * The next index belongs to the new trace chunk; rotate. | |
521 | * In overwrite mode, the packet seq num may jump over the | |
522 | * rotation position. | |
523 | */ | |
524 | assert(LTTNG_OPTIONAL_GET(stream->received_packet_seq_num) + 1 >= | |
525 | stream->ongoing_rotation.value.packet_seq_num); | |
c35f9726 JG |
526 | DBG("Rotating stream %" PRIu64 " index file", |
527 | stream->stream_handle); | |
528 | ret = create_index_file(stream, | |
529 | stream->ongoing_rotation.value.next_trace_chunk); | |
530 | stream->ongoing_rotation.value.index_rotated = true; | |
531 | ||
0f83d1cc MD |
532 | /* |
533 | * Set the rotation pivot position for the data, now that we have the | |
534 | * net_seq_num matching the packet_seq_num index pivot position. | |
535 | */ | |
536 | stream->ongoing_rotation.value.prev_data_net_seq = | |
537 | stream->prev_index_seq; | |
c35f9726 JG |
538 | if (stream->ongoing_rotation.value.data_rotated && |
539 | stream->ongoing_rotation.value.index_rotated) { | |
540 | /* Rotation completed; reset its state. */ | |
541 | DBG("Rotation completed for stream %" PRIu64, | |
542 | stream->stream_handle); | |
543 | stream_complete_rotation(stream); | |
544 | } | |
545 | } | |
546 | ||
547 | end: | |
548 | return ret; | |
549 | } | |
550 | ||
348a81dc JG |
551 | static int stream_set_trace_chunk(struct relay_stream *stream, |
552 | struct lttng_trace_chunk *chunk) | |
553 | { | |
554 | int ret = 0; | |
555 | enum lttng_trace_chunk_status status; | |
556 | bool acquired_reference; | |
c35f9726 | 557 | struct stream_fd *new_stream_fd = NULL; |
348a81dc | 558 | |
348a81dc JG |
559 | status = lttng_trace_chunk_create_subdirectory(chunk, |
560 | stream->path_name); | |
561 | if (status != LTTNG_TRACE_CHUNK_STATUS_OK) { | |
562 | ret = -1; | |
563 | goto end; | |
564 | } | |
565 | ||
566 | lttng_trace_chunk_put(stream->trace_chunk); | |
567 | acquired_reference = lttng_trace_chunk_get(chunk); | |
568 | assert(acquired_reference); | |
569 | stream->trace_chunk = chunk; | |
c35f9726 JG |
570 | |
571 | if (stream->stream_fd) { | |
572 | stream_fd_put(stream->stream_fd); | |
573 | stream->stream_fd = NULL; | |
574 | } | |
575 | ret = stream_create_data_output_file_from_trace_chunk(stream, chunk, | |
576 | false, &new_stream_fd); | |
577 | stream->stream_fd = new_stream_fd; | |
348a81dc | 578 | end: |
348a81dc JG |
579 | return ret; |
580 | } | |
581 | ||
2a174661 | 582 | /* |
7591bab1 | 583 | * We keep ownership of path_name and channel_name. |
2a174661 | 584 | */ |
7591bab1 MD |
585 | struct relay_stream *stream_create(struct ctf_trace *trace, |
586 | uint64_t stream_handle, char *path_name, | |
587 | char *channel_name, uint64_t tracefile_size, | |
348a81dc | 588 | uint64_t tracefile_count) |
2a174661 | 589 | { |
7591bab1 MD |
590 | int ret; |
591 | struct relay_stream *stream = NULL; | |
592 | struct relay_session *session = trace->session; | |
348a81dc JG |
593 | bool acquired_reference = false; |
594 | struct lttng_trace_chunk *current_trace_chunk; | |
2a174661 | 595 | |
7591bab1 MD |
596 | stream = zmalloc(sizeof(struct relay_stream)); |
597 | if (stream == NULL) { | |
598 | PERROR("relay stream zmalloc"); | |
7591bab1 MD |
599 | goto error_no_alloc; |
600 | } | |
2a174661 | 601 | |
7591bab1 | 602 | stream->stream_handle = stream_handle; |
a8f9f353 | 603 | stream->prev_data_seq = -1ULL; |
7a45c7e6 | 604 | stream->prev_index_seq = -1ULL; |
bda7c7b9 | 605 | stream->last_net_seq_num = -1ULL; |
7591bab1 MD |
606 | stream->ctf_stream_id = -1ULL; |
607 | stream->tracefile_size = tracefile_size; | |
608 | stream->tracefile_count = tracefile_count; | |
609 | stream->path_name = path_name; | |
610 | stream->channel_name = channel_name; | |
2f9c3030 | 611 | stream->beacon_ts_end = -1ULL; |
7591bab1 MD |
612 | lttng_ht_node_init_u64(&stream->node, stream->stream_handle); |
613 | pthread_mutex_init(&stream->lock, NULL); | |
7591bab1 MD |
614 | urcu_ref_init(&stream->ref); |
615 | ctf_trace_get(trace); | |
616 | stream->trace = trace; | |
2a174661 | 617 | |
348a81dc JG |
618 | pthread_mutex_lock(&trace->session->lock); |
619 | current_trace_chunk = trace->session->current_trace_chunk; | |
620 | if (current_trace_chunk) { | |
621 | acquired_reference = lttng_trace_chunk_get(current_trace_chunk); | |
622 | } | |
623 | pthread_mutex_unlock(&trace->session->lock); | |
624 | if (!acquired_reference) { | |
625 | ERR("Cannot create stream for channel \"%s\" as a reference to the session's current trace chunk could not be acquired", | |
626 | channel_name); | |
7591bab1 MD |
627 | ret = -1; |
628 | goto end; | |
2a174661 DG |
629 | } |
630 | ||
348a81dc JG |
631 | stream->indexes_ht = lttng_ht_new(0, LTTNG_HT_TYPE_U64); |
632 | if (!stream->indexes_ht) { | |
633 | ERR("Cannot created indexes_ht"); | |
634 | ret = -1; | |
7591bab1 MD |
635 | goto end; |
636 | } | |
2a174661 | 637 | |
c35f9726 | 638 | pthread_mutex_lock(&stream->lock); |
348a81dc | 639 | ret = stream_set_trace_chunk(stream, current_trace_chunk); |
c35f9726 | 640 | pthread_mutex_unlock(&stream->lock); |
348a81dc JG |
641 | if (ret) { |
642 | ERR("Failed to set the current trace chunk of session \"%s\" on newly created stream of channel \"%s\"", | |
643 | trace->session->session_name, | |
644 | stream->channel_name); | |
7591bab1 MD |
645 | ret = -1; |
646 | goto end; | |
2a174661 | 647 | } |
a44ca2ca MD |
648 | stream->tfa = tracefile_array_create(stream->tracefile_count); |
649 | if (!stream->tfa) { | |
650 | ret = -1; | |
651 | goto end; | |
652 | } | |
7591bab1 | 653 | |
348a81dc JG |
654 | stream->is_metadata = !strcmp(stream->channel_name, |
655 | DEFAULT_METADATA_NAME); | |
7591bab1 MD |
656 | stream->in_recv_list = true; |
657 | ||
658 | /* | |
659 | * Add the stream in the recv list of the session. Once the end stream | |
660 | * message is received, all session streams are published. | |
661 | */ | |
662 | pthread_mutex_lock(&session->recv_list_lock); | |
663 | cds_list_add_rcu(&stream->recv_node, &session->recv_list); | |
664 | session->stream_count++; | |
665 | pthread_mutex_unlock(&session->recv_list_lock); | |
666 | ||
667 | /* | |
668 | * Both in the ctf_trace object and the global stream ht since the data | |
669 | * side of the relayd does not have the concept of session. | |
670 | */ | |
671 | lttng_ht_add_unique_u64(relay_streams_ht, &stream->node); | |
77f7bd85 | 672 | stream->in_stream_ht = true; |
2a174661 | 673 | |
7591bab1 MD |
674 | DBG("Relay new stream added %s with ID %" PRIu64, stream->channel_name, |
675 | stream->stream_handle); | |
676 | ret = 0; | |
677 | ||
678 | end: | |
679 | if (ret) { | |
680 | if (stream->stream_fd) { | |
681 | stream_fd_put(stream->stream_fd); | |
682 | stream->stream_fd = NULL; | |
2a174661 | 683 | } |
7591bab1 MD |
684 | stream_put(stream); |
685 | stream = NULL; | |
2a174661 | 686 | } |
317eadef JG |
687 | if (acquired_reference) { |
688 | lttng_trace_chunk_put(current_trace_chunk); | |
689 | } | |
7591bab1 | 690 | return stream; |
2a174661 | 691 | |
7591bab1 MD |
692 | error_no_alloc: |
693 | /* | |
694 | * path_name and channel_name need to be freed explicitly here | |
695 | * because we cannot rely on stream_put(). | |
696 | */ | |
697 | free(path_name); | |
698 | free(channel_name); | |
699 | return NULL; | |
700 | } | |
701 | ||
702 | /* | |
703 | * Called with the session lock held. | |
704 | */ | |
705 | void stream_publish(struct relay_stream *stream) | |
706 | { | |
707 | struct relay_session *session; | |
708 | ||
709 | pthread_mutex_lock(&stream->lock); | |
710 | if (stream->published) { | |
711 | goto unlock; | |
2a174661 DG |
712 | } |
713 | ||
7591bab1 | 714 | session = stream->trace->session; |
2a174661 | 715 | |
7591bab1 MD |
716 | pthread_mutex_lock(&session->recv_list_lock); |
717 | if (stream->in_recv_list) { | |
718 | cds_list_del_rcu(&stream->recv_node); | |
719 | stream->in_recv_list = false; | |
720 | } | |
721 | pthread_mutex_unlock(&session->recv_list_lock); | |
2a174661 | 722 | |
7591bab1 MD |
723 | pthread_mutex_lock(&stream->trace->stream_list_lock); |
724 | cds_list_add_rcu(&stream->stream_node, &stream->trace->stream_list); | |
725 | pthread_mutex_unlock(&stream->trace->stream_list_lock); | |
2a174661 | 726 | |
7591bab1 MD |
727 | stream->published = true; |
728 | unlock: | |
2a174661 | 729 | pthread_mutex_unlock(&stream->lock); |
2a174661 DG |
730 | } |
731 | ||
7591bab1 | 732 | /* |
77f7bd85 | 733 | * Stream must be protected by holding the stream lock or by virtue of being |
ce4d4083 | 734 | * called from stream_destroy. |
7591bab1 MD |
735 | */ |
736 | static void stream_unpublish(struct relay_stream *stream) | |
2a174661 | 737 | { |
77f7bd85 MD |
738 | if (stream->in_stream_ht) { |
739 | struct lttng_ht_iter iter; | |
740 | int ret; | |
741 | ||
742 | iter.iter.node = &stream->node.node; | |
743 | ret = lttng_ht_del(relay_streams_ht, &iter); | |
744 | assert(!ret); | |
745 | stream->in_stream_ht = false; | |
746 | } | |
747 | if (stream->published) { | |
748 | pthread_mutex_lock(&stream->trace->stream_list_lock); | |
749 | cds_list_del_rcu(&stream->stream_node); | |
750 | pthread_mutex_unlock(&stream->trace->stream_list_lock); | |
751 | stream->published = false; | |
7591bab1 | 752 | } |
7591bab1 MD |
753 | } |
754 | ||
755 | static void stream_destroy(struct relay_stream *stream) | |
756 | { | |
757 | if (stream->indexes_ht) { | |
49e614cb MD |
758 | /* |
759 | * Calling lttng_ht_destroy in call_rcu worker thread so | |
760 | * we don't hold the RCU read-side lock while calling | |
761 | * it. | |
762 | */ | |
7591bab1 MD |
763 | lttng_ht_destroy(stream->indexes_ht); |
764 | } | |
a44ca2ca MD |
765 | if (stream->tfa) { |
766 | tracefile_array_destroy(stream->tfa); | |
767 | } | |
7591bab1 MD |
768 | free(stream->path_name); |
769 | free(stream->channel_name); | |
770 | free(stream); | |
771 | } | |
772 | ||
773 | static void stream_destroy_rcu(struct rcu_head *rcu_head) | |
774 | { | |
775 | struct relay_stream *stream = | |
776 | caa_container_of(rcu_head, struct relay_stream, rcu_node); | |
777 | ||
778 | stream_destroy(stream); | |
779 | } | |
780 | ||
781 | /* | |
782 | * No need to take stream->lock since this is only called on the final | |
783 | * stream_put which ensures that a single thread may act on the stream. | |
7591bab1 MD |
784 | */ |
785 | static void stream_release(struct urcu_ref *ref) | |
786 | { | |
787 | struct relay_stream *stream = | |
788 | caa_container_of(ref, struct relay_stream, ref); | |
789 | struct relay_session *session; | |
2a174661 | 790 | |
7591bab1 MD |
791 | session = stream->trace->session; |
792 | ||
793 | DBG("Releasing stream id %" PRIu64, stream->stream_handle); | |
794 | ||
795 | pthread_mutex_lock(&session->recv_list_lock); | |
796 | session->stream_count--; | |
797 | if (stream->in_recv_list) { | |
798 | cds_list_del_rcu(&stream->recv_node); | |
799 | stream->in_recv_list = false; | |
800 | } | |
801 | pthread_mutex_unlock(&session->recv_list_lock); | |
2a174661 | 802 | |
7591bab1 MD |
803 | stream_unpublish(stream); |
804 | ||
805 | if (stream->stream_fd) { | |
806 | stream_fd_put(stream->stream_fd); | |
807 | stream->stream_fd = NULL; | |
808 | } | |
f8f3885c MD |
809 | if (stream->index_file) { |
810 | lttng_index_file_put(stream->index_file); | |
811 | stream->index_file = NULL; | |
7591bab1 MD |
812 | } |
813 | if (stream->trace) { | |
814 | ctf_trace_put(stream->trace); | |
815 | stream->trace = NULL; | |
816 | } | |
c35f9726 | 817 | stream_complete_rotation(stream); |
348a81dc JG |
818 | lttng_trace_chunk_put(stream->trace_chunk); |
819 | stream->trace_chunk = NULL; | |
7591bab1 MD |
820 | |
821 | call_rcu(&stream->rcu_node, stream_destroy_rcu); | |
2a174661 DG |
822 | } |
823 | ||
7591bab1 | 824 | void stream_put(struct relay_stream *stream) |
2a174661 | 825 | { |
7591bab1 | 826 | rcu_read_lock(); |
7591bab1 MD |
827 | assert(stream->ref.refcount != 0); |
828 | /* | |
829 | * Wait until we have processed all the stream packets before | |
830 | * actually putting our last stream reference. | |
831 | */ | |
7591bab1 | 832 | urcu_ref_put(&stream->ref, stream_release); |
7591bab1 MD |
833 | rcu_read_unlock(); |
834 | } | |
835 | ||
c35f9726 JG |
836 | int stream_set_pending_rotation(struct relay_stream *stream, |
837 | struct lttng_trace_chunk *next_trace_chunk, | |
838 | uint64_t rotation_sequence_number) | |
839 | { | |
840 | int ret = 0; | |
841 | const struct relay_stream_rotation rotation = { | |
0f83d1cc MD |
842 | .data_rotated = false, |
843 | .index_rotated = false, | |
844 | .packet_seq_num = rotation_sequence_number, | |
845 | .prev_data_net_seq = -1ULL, | |
c35f9726 JG |
846 | .next_trace_chunk = next_trace_chunk, |
847 | }; | |
848 | ||
849 | if (stream->ongoing_rotation.is_set) { | |
850 | ERR("Attempted to set a pending rotation on a stream already being rotated (protocol error)"); | |
851 | ret = -1; | |
852 | goto end; | |
853 | } | |
854 | ||
855 | if (next_trace_chunk) { | |
856 | const bool reference_acquired = | |
857 | lttng_trace_chunk_get(next_trace_chunk); | |
858 | ||
859 | assert(reference_acquired); | |
860 | } | |
861 | LTTNG_OPTIONAL_SET(&stream->ongoing_rotation, rotation); | |
862 | ||
0f83d1cc MD |
863 | DBG("Setting pending rotation: stream_id = %" PRIu64 |
864 | ", rotate_at_packet_seq_num = %" PRIu64, | |
c35f9726 JG |
865 | stream->stream_handle, rotation_sequence_number); |
866 | if (stream->is_metadata) { | |
867 | /* | |
868 | * A metadata stream has no index; consider it already rotated. | |
869 | */ | |
870 | stream->ongoing_rotation.value.index_rotated = true; | |
871 | ret = stream_rotate_data_file(stream); | |
872 | } else { | |
0f83d1cc | 873 | ret = try_rotate_stream_index(stream); |
c35f9726 JG |
874 | if (ret < 0) { |
875 | goto end; | |
876 | } | |
877 | ||
0f83d1cc | 878 | ret = try_rotate_stream_data(stream); |
c35f9726 JG |
879 | if (ret < 0) { |
880 | goto end; | |
881 | } | |
882 | } | |
883 | end: | |
884 | return ret; | |
885 | } | |
886 | ||
bda7c7b9 | 887 | void try_stream_close(struct relay_stream *stream) |
7591bab1 | 888 | { |
98ba050e JR |
889 | bool session_aborted; |
890 | struct relay_session *session = stream->trace->session; | |
891 | ||
bda7c7b9 | 892 | DBG("Trying to close stream %" PRIu64, stream->stream_handle); |
98ba050e JR |
893 | |
894 | pthread_mutex_lock(&session->lock); | |
895 | session_aborted = session->aborted; | |
896 | pthread_mutex_unlock(&session->lock); | |
897 | ||
7591bab1 | 898 | pthread_mutex_lock(&stream->lock); |
bda7c7b9 JG |
899 | /* |
900 | * Can be called concurently by connection close and reception of last | |
901 | * pending data. | |
902 | */ | |
903 | if (stream->closed) { | |
904 | pthread_mutex_unlock(&stream->lock); | |
905 | DBG("closing stream %" PRIu64 " aborted since it is already marked as closed", stream->stream_handle); | |
906 | return; | |
907 | } | |
908 | ||
909 | stream->close_requested = true; | |
3d07a857 MD |
910 | |
911 | if (stream->last_net_seq_num == -1ULL) { | |
912 | /* | |
913 | * Handle connection close without explicit stream close | |
914 | * command. | |
915 | * | |
916 | * We can be clever about indexes partially received in | |
917 | * cases where we received the data socket part, but not | |
918 | * the control socket part: since we're currently closing | |
919 | * the stream on behalf of the control socket, we *know* | |
920 | * there won't be any more control information for this | |
921 | * socket. Therefore, we can destroy all indexes for | |
922 | * which we have received only the file descriptor (from | |
923 | * data socket). This takes care of consumerd crashes | |
924 | * between sending the data and control information for | |
925 | * a packet. Since those are sent in that order, we take | |
926 | * care of consumerd crashes. | |
927 | */ | |
5312a3ed | 928 | DBG("relay_index_close_partial_fd"); |
3d07a857 MD |
929 | relay_index_close_partial_fd(stream); |
930 | /* | |
931 | * Use the highest net_seq_num we currently have pending | |
932 | * As end of stream indicator. Leave last_net_seq_num | |
933 | * at -1ULL if we cannot find any index. | |
934 | */ | |
935 | stream->last_net_seq_num = relay_index_find_last(stream); | |
5312a3ed | 936 | DBG("Updating stream->last_net_seq_num to %" PRIu64, stream->last_net_seq_num); |
3d07a857 MD |
937 | /* Fall-through into the next check. */ |
938 | } | |
939 | ||
bda7c7b9 | 940 | if (stream->last_net_seq_num != -1ULL && |
a8f9f353 | 941 | ((int64_t) (stream->prev_data_seq - stream->last_net_seq_num)) < 0 |
98ba050e | 942 | && !session_aborted) { |
3d07a857 MD |
943 | /* |
944 | * Don't close since we still have data pending. This | |
945 | * handles cases where an explicit close command has | |
946 | * been received for this stream, and cases where the | |
947 | * connection has been closed, and we are awaiting for | |
948 | * index information from the data socket. It is | |
949 | * therefore expected that all the index fd information | |
950 | * we need has already been received on the control | |
951 | * socket. Matching index information from data socket | |
952 | * should be Expected Soon(TM). | |
953 | * | |
954 | * TODO: We should implement a timer to garbage collect | |
955 | * streams after a timeout to be resilient against a | |
956 | * consumerd implementation that would not match this | |
957 | * expected behavior. | |
958 | */ | |
bda7c7b9 JG |
959 | pthread_mutex_unlock(&stream->lock); |
960 | DBG("closing stream %" PRIu64 " aborted since it still has data pending", stream->stream_handle); | |
961 | return; | |
962 | } | |
3d07a857 MD |
963 | /* |
964 | * We received all the indexes we can expect. | |
965 | */ | |
77f7bd85 | 966 | stream_unpublish(stream); |
2229a09c | 967 | stream->closed = true; |
bda7c7b9 | 968 | /* Relay indexes are only used by the "consumer/sessiond" end. */ |
7591bab1 | 969 | relay_index_close_all(stream); |
d91bc249 MD |
970 | |
971 | /* | |
972 | * If we are closed by an application exiting (per-pid buffers), | |
973 | * we need to put our reference on the stream trace chunk right | |
974 | * away, because otherwise still holding the reference on the | |
975 | * trace chunk could allow a viewer stream (which holds a reference | |
976 | * to the stream) to postpone destroy waiting for the chunk to cease | |
977 | * to exist endlessly until the viewer is detached. | |
978 | */ | |
979 | ||
980 | /* Put stream fd before put chunk. */ | |
981 | if (stream->stream_fd) { | |
982 | stream_fd_put(stream->stream_fd); | |
983 | stream->stream_fd = NULL; | |
984 | } | |
985 | if (stream->index_file) { | |
986 | lttng_index_file_put(stream->index_file); | |
987 | stream->index_file = NULL; | |
988 | } | |
989 | lttng_trace_chunk_put(stream->trace_chunk); | |
990 | stream->trace_chunk = NULL; | |
7591bab1 | 991 | pthread_mutex_unlock(&stream->lock); |
bda7c7b9 | 992 | DBG("Succeeded in closing stream %" PRIu64, stream->stream_handle); |
7591bab1 MD |
993 | stream_put(stream); |
994 | } | |
995 | ||
c35f9726 JG |
996 | int stream_init_packet(struct relay_stream *stream, size_t packet_size, |
997 | bool *file_rotated) | |
998 | { | |
999 | int ret = 0; | |
1000 | ||
1001 | ASSERT_LOCKED(stream->lock); | |
1ad1103b JG |
1002 | |
1003 | if (!stream->stream_fd || !stream->trace_chunk) { | |
1004 | ERR("Protocol error: received a packet for a stream that doesn't have a current trace chunk: stream_id = %" PRIu64 ", channel_name = %s", | |
1005 | stream->stream_handle, stream->channel_name); | |
1006 | ret = -1; | |
1007 | goto end; | |
1008 | } | |
1009 | ||
c35f9726 JG |
1010 | if (caa_likely(stream->tracefile_size == 0)) { |
1011 | /* No size limit set; nothing to check. */ | |
1012 | goto end; | |
1013 | } | |
1014 | ||
1015 | /* | |
1016 | * Check if writing the new packet would exceed the maximal file size. | |
1017 | */ | |
1018 | if (caa_unlikely((stream->tracefile_size_current + packet_size) > | |
1019 | stream->tracefile_size)) { | |
1020 | const uint64_t new_file_index = | |
1021 | (stream->tracefile_current_index + 1) % | |
1022 | stream->tracefile_count; | |
1023 | ||
1024 | if (new_file_index < stream->tracefile_current_index) { | |
1025 | stream->tracefile_wrapped_around = true; | |
1026 | } | |
1027 | DBG("New stream packet causes stream file rotation: stream_id = %" PRIu64 | |
1028 | ", current_file_size = %" PRIu64 | |
76ee9245 | 1029 | ", packet_size = %zu, current_file_index = %" PRIu64 |
c35f9726 JG |
1030 | " new_file_index = %" PRIu64, |
1031 | stream->stream_handle, | |
1032 | stream->tracefile_size_current, packet_size, | |
1033 | stream->tracefile_current_index, new_file_index); | |
78118e3b | 1034 | tracefile_array_file_rotate(stream->tfa, TRACEFILE_ROTATE_WRITE); |
c35f9726 JG |
1035 | stream->tracefile_current_index = new_file_index; |
1036 | ||
1037 | if (stream->stream_fd) { | |
1038 | stream_fd_put(stream->stream_fd); | |
1039 | stream->stream_fd = NULL; | |
1040 | } | |
1041 | ret = stream_create_data_output_file_from_trace_chunk(stream, | |
1042 | stream->trace_chunk, false, &stream->stream_fd); | |
1043 | if (ret) { | |
1044 | ERR("Failed to perform trace file rotation of stream %" PRIu64, | |
1045 | stream->stream_handle); | |
1046 | goto end; | |
1047 | } | |
1048 | ||
1049 | /* | |
1050 | * Reset current size because we just performed a stream | |
1051 | * rotation. | |
1052 | */ | |
68c40154 MD |
1053 | DBG("%s: reset tracefile_size_current for stream %" PRIu64 " was %" PRIu64, |
1054 | __func__, stream->stream_handle, stream->tracefile_size_current); | |
c35f9726 JG |
1055 | stream->tracefile_size_current = 0; |
1056 | *file_rotated = true; | |
1057 | } else { | |
1058 | *file_rotated = false; | |
1059 | } | |
1060 | end: | |
1061 | return ret; | |
1062 | } | |
1063 | ||
1064 | /* Note that the packet is not necessarily complete. */ | |
1065 | int stream_write(struct relay_stream *stream, | |
1066 | const struct lttng_buffer_view *packet, size_t padding_len) | |
1067 | { | |
1068 | int ret = 0; | |
1069 | ssize_t write_ret; | |
1070 | size_t padding_to_write = padding_len; | |
1071 | char padding_buffer[FILE_IO_STACK_BUFFER_SIZE]; | |
1072 | ||
1073 | ASSERT_LOCKED(stream->lock); | |
1074 | memset(padding_buffer, 0, | |
1075 | min(sizeof(padding_buffer), padding_to_write)); | |
1076 | ||
1ad1103b JG |
1077 | if (!stream->stream_fd || !stream->trace_chunk) { |
1078 | ERR("Protocol error: received a packet for a stream that doesn't have a current trace chunk: stream_id = %" PRIu64 ", channel_name = %s", | |
1079 | stream->stream_handle, stream->channel_name); | |
1080 | ret = -1; | |
1081 | goto end; | |
1082 | } | |
c35f9726 JG |
1083 | if (packet) { |
1084 | write_ret = lttng_write(stream->stream_fd->fd, | |
1085 | packet->data, packet->size); | |
1086 | if (write_ret != packet->size) { | |
1087 | PERROR("Failed to write to stream file of %sstream %" PRIu64, | |
1088 | stream->is_metadata ? "metadata " : "", | |
1089 | stream->stream_handle); | |
1090 | ret = -1; | |
1091 | goto end; | |
1092 | } | |
1093 | } | |
1094 | ||
1095 | while (padding_to_write > 0) { | |
1096 | const size_t padding_to_write_this_pass = | |
1097 | min(padding_to_write, sizeof(padding_buffer)); | |
1098 | ||
1099 | write_ret = lttng_write(stream->stream_fd->fd, | |
1100 | padding_buffer, padding_to_write_this_pass); | |
1101 | if (write_ret != padding_to_write_this_pass) { | |
1102 | PERROR("Failed to write padding to file of %sstream %" PRIu64, | |
1103 | stream->is_metadata ? "metadata " : "", | |
1104 | stream->stream_handle); | |
1105 | ret = -1; | |
1106 | goto end; | |
1107 | } | |
1108 | padding_to_write -= padding_to_write_this_pass; | |
1109 | } | |
1110 | ||
1111 | if (stream->is_metadata) { | |
94f73d08 MD |
1112 | size_t recv_len; |
1113 | ||
1114 | recv_len = packet ? packet->size : 0; | |
1115 | recv_len += padding_len; | |
1116 | stream->metadata_received += recv_len; | |
1117 | if (recv_len) { | |
1118 | stream->no_new_metadata_notified = false; | |
1119 | } | |
c35f9726 JG |
1120 | } |
1121 | ||
8c865d87 | 1122 | DBG("Wrote to %sstream %" PRIu64 ": data_length = %zu, padding_length = %zu", |
c35f9726 JG |
1123 | stream->is_metadata ? "metadata " : "", |
1124 | stream->stream_handle, | |
8c865d87 | 1125 | packet ? packet->size : (size_t) 0, padding_len); |
c35f9726 JG |
1126 | end: |
1127 | return ret; | |
1128 | } | |
1129 | ||
1130 | /* | |
1131 | * Update index after receiving a packet for a data stream. | |
1132 | * | |
1133 | * Called with the stream lock held. | |
1134 | * | |
1135 | * Return 0 on success else a negative value. | |
1136 | */ | |
1137 | int stream_update_index(struct relay_stream *stream, uint64_t net_seq_num, | |
1138 | bool rotate_index, bool *flushed, uint64_t total_size) | |
1139 | { | |
1140 | int ret = 0; | |
1141 | uint64_t data_offset; | |
1142 | struct relay_index *index; | |
1143 | ||
92761772 | 1144 | assert(stream->trace_chunk); |
c35f9726 JG |
1145 | ASSERT_LOCKED(stream->lock); |
1146 | /* Get data offset because we are about to update the index. */ | |
1147 | data_offset = htobe64(stream->tracefile_size_current); | |
1148 | ||
1149 | DBG("handle_index_data: stream %" PRIu64 " net_seq_num %" PRIu64 " data offset %" PRIu64, | |
1150 | stream->stream_handle, net_seq_num, stream->tracefile_size_current); | |
1151 | ||
1152 | /* | |
1153 | * Lookup for an existing index for that stream id/sequence | |
1154 | * number. If it exists, the control thread has already received the | |
1155 | * data for it, thus we need to write it to disk. | |
1156 | */ | |
1157 | index = relay_index_get_by_id_or_create(stream, net_seq_num); | |
1158 | if (!index) { | |
1159 | ret = -1; | |
1160 | goto end; | |
1161 | } | |
1162 | ||
1163 | if (rotate_index || !stream->index_file) { | |
1164 | ret = create_index_file(stream, stream->trace_chunk); | |
1165 | if (ret) { | |
1166 | ERR("Failed to create index file for stream %" PRIu64, | |
1167 | stream->stream_handle); | |
1168 | /* Put self-ref for this index due to error. */ | |
1169 | relay_index_put(index); | |
1170 | index = NULL; | |
1171 | goto end; | |
1172 | } | |
1173 | } | |
1174 | ||
1175 | if (relay_index_set_file(index, stream->index_file, data_offset)) { | |
1176 | ret = -1; | |
1177 | /* Put self-ref for this index due to error. */ | |
1178 | relay_index_put(index); | |
1179 | index = NULL; | |
1180 | goto end; | |
1181 | } | |
1182 | ||
1183 | ret = relay_index_try_flush(index); | |
1184 | if (ret == 0) { | |
78118e3b | 1185 | tracefile_array_file_rotate(stream->tfa, TRACEFILE_ROTATE_READ); |
62f6e9ef | 1186 | tracefile_array_commit_seq(stream->tfa, stream->index_received_seqcount); |
c35f9726 | 1187 | stream->index_received_seqcount++; |
0f83d1cc MD |
1188 | LTTNG_OPTIONAL_SET(&stream->received_packet_seq_num, |
1189 | be64toh(index->index_data.packet_seq_num)); | |
c35f9726 JG |
1190 | *flushed = true; |
1191 | } else if (ret > 0) { | |
1192 | index->total_size = total_size; | |
1193 | /* No flush. */ | |
1194 | ret = 0; | |
1195 | } else { | |
1196 | /* | |
1197 | * ret < 0 | |
1198 | * | |
1199 | * relay_index_try_flush is responsible for the self-reference | |
1200 | * put of the index object on error. | |
1201 | */ | |
1202 | ERR("relay_index_try_flush error %d", ret); | |
1203 | ret = -1; | |
1204 | } | |
1205 | end: | |
1206 | return ret; | |
1207 | } | |
1208 | ||
1209 | int stream_complete_packet(struct relay_stream *stream, size_t packet_total_size, | |
1210 | uint64_t sequence_number, bool index_flushed) | |
1211 | { | |
1212 | int ret = 0; | |
1213 | ||
1214 | ASSERT_LOCKED(stream->lock); | |
1215 | ||
1216 | stream->tracefile_size_current += packet_total_size; | |
1217 | if (index_flushed) { | |
1218 | stream->pos_after_last_complete_data_index = | |
1219 | stream->tracefile_size_current; | |
1220 | stream->prev_index_seq = sequence_number; | |
1221 | ret = try_rotate_stream_index(stream); | |
1222 | if (ret < 0) { | |
1223 | goto end; | |
1224 | } | |
1225 | } | |
1226 | ||
1227 | stream->prev_data_seq = sequence_number; | |
1228 | ret = try_rotate_stream_data(stream); | |
d2ec9b88 | 1229 | |
c35f9726 JG |
1230 | end: |
1231 | return ret; | |
1232 | } | |
1233 | ||
1234 | int stream_add_index(struct relay_stream *stream, | |
1235 | const struct lttcomm_relayd_index *index_info) | |
1236 | { | |
1237 | int ret = 0; | |
1238 | struct relay_index *index; | |
1239 | ||
1240 | ASSERT_LOCKED(stream->lock); | |
1241 | ||
68c40154 MD |
1242 | DBG("stream_add_index for stream %" PRIu64, stream->stream_handle); |
1243 | ||
c35f9726 JG |
1244 | /* Live beacon handling */ |
1245 | if (index_info->packet_size == 0) { | |
1246 | DBG("Received live beacon for stream %" PRIu64, | |
1247 | stream->stream_handle); | |
1248 | ||
1249 | /* | |
1250 | * Only flag a stream inactive when it has already | |
1251 | * received data and no indexes are in flight. | |
1252 | */ | |
1253 | if (stream->index_received_seqcount > 0 | |
1254 | && stream->indexes_in_flight == 0) { | |
1255 | stream->beacon_ts_end = index_info->timestamp_end; | |
1256 | } | |
1257 | ret = 0; | |
1258 | goto end; | |
1259 | } else { | |
1260 | stream->beacon_ts_end = -1ULL; | |
1261 | } | |
1262 | ||
1263 | if (stream->ctf_stream_id == -1ULL) { | |
1264 | stream->ctf_stream_id = index_info->stream_id; | |
1265 | } | |
1266 | ||
1267 | index = relay_index_get_by_id_or_create(stream, index_info->net_seq_num); | |
1268 | if (!index) { | |
1269 | ret = -1; | |
1270 | ERR("Failed to get or create index %" PRIu64, | |
1271 | index_info->net_seq_num); | |
1272 | goto end; | |
1273 | } | |
1274 | if (relay_index_set_control_data(index, index_info, | |
1275 | stream->trace->session->minor)) { | |
1276 | ERR("set_index_control_data error"); | |
1277 | relay_index_put(index); | |
1278 | ret = -1; | |
1279 | goto end; | |
1280 | } | |
1281 | ret = relay_index_try_flush(index); | |
1282 | if (ret == 0) { | |
78118e3b | 1283 | tracefile_array_file_rotate(stream->tfa, TRACEFILE_ROTATE_READ); |
62f6e9ef | 1284 | tracefile_array_commit_seq(stream->tfa, stream->index_received_seqcount); |
c35f9726 JG |
1285 | stream->index_received_seqcount++; |
1286 | stream->pos_after_last_complete_data_index += index->total_size; | |
1287 | stream->prev_index_seq = index_info->net_seq_num; | |
0f83d1cc MD |
1288 | LTTNG_OPTIONAL_SET(&stream->received_packet_seq_num, |
1289 | index_info->packet_seq_num); | |
c35f9726 JG |
1290 | |
1291 | ret = try_rotate_stream_index(stream); | |
1292 | if (ret < 0) { | |
1293 | goto end; | |
1294 | } | |
0f83d1cc MD |
1295 | ret = try_rotate_stream_data(stream); |
1296 | if (ret < 0) { | |
1297 | goto end; | |
1298 | } | |
c35f9726 JG |
1299 | } else if (ret > 0) { |
1300 | /* no flush. */ | |
1301 | ret = 0; | |
1302 | } else { | |
1303 | /* | |
1304 | * ret < 0 | |
1305 | * | |
1306 | * relay_index_try_flush is responsible for the self-reference | |
1307 | * put of the index object on error. | |
1308 | */ | |
1309 | ERR("relay_index_try_flush error %d", ret); | |
1310 | ret = -1; | |
1311 | } | |
1312 | end: | |
1313 | return ret; | |
1314 | } | |
1315 | ||
da412cde MD |
1316 | static void print_stream_indexes(struct relay_stream *stream) |
1317 | { | |
1318 | struct lttng_ht_iter iter; | |
1319 | struct relay_index *index; | |
1320 | ||
1321 | rcu_read_lock(); | |
1322 | cds_lfht_for_each_entry(stream->indexes_ht->ht, &iter.iter, index, | |
1323 | index_n.node) { | |
1324 | DBG("index %p net_seq_num %" PRIu64 " refcount %ld" | |
1325 | " stream %" PRIu64 " trace %" PRIu64 | |
1326 | " session %" PRIu64, | |
1327 | index, | |
1328 | index->index_n.key, | |
1329 | stream->ref.refcount, | |
1330 | index->stream->stream_handle, | |
1331 | index->stream->trace->id, | |
1332 | index->stream->trace->session->id); | |
1333 | } | |
1334 | rcu_read_unlock(); | |
1335 | } | |
1336 | ||
c35f9726 JG |
1337 | int stream_reset_file(struct relay_stream *stream) |
1338 | { | |
1339 | ASSERT_LOCKED(stream->lock); | |
1340 | ||
1341 | if (stream->stream_fd) { | |
1342 | stream_fd_put(stream->stream_fd); | |
1343 | stream->stream_fd = NULL; | |
1344 | } | |
1345 | ||
68c40154 MD |
1346 | DBG("%s: reset tracefile_size_current for stream %" PRIu64 " was %" PRIu64, |
1347 | __func__, stream->stream_handle, stream->tracefile_size_current); | |
c35f9726 JG |
1348 | stream->tracefile_size_current = 0; |
1349 | stream->prev_data_seq = 0; | |
1350 | stream->prev_index_seq = 0; | |
1351 | /* Note that this does not reset the tracefile array. */ | |
1352 | stream->tracefile_current_index = 0; | |
1353 | stream->pos_after_last_complete_data_index = 0; | |
1354 | ||
1355 | return stream_create_data_output_file_from_trace_chunk(stream, | |
1356 | stream->trace_chunk, true, &stream->stream_fd); | |
1357 | } | |
1358 | ||
7591bab1 MD |
1359 | void print_relay_streams(void) |
1360 | { | |
1361 | struct lttng_ht_iter iter; | |
1362 | struct relay_stream *stream; | |
1363 | ||
ce3f3ba3 JG |
1364 | if (!relay_streams_ht) { |
1365 | return; | |
1366 | } | |
1367 | ||
7591bab1 MD |
1368 | rcu_read_lock(); |
1369 | cds_lfht_for_each_entry(relay_streams_ht->ht, &iter.iter, stream, | |
1370 | node.node) { | |
1371 | if (!stream_get(stream)) { | |
1372 | continue; | |
1373 | } | |
1374 | DBG("stream %p refcount %ld stream %" PRIu64 " trace %" PRIu64 | |
1375 | " session %" PRIu64, | |
1376 | stream, | |
1377 | stream->ref.refcount, | |
1378 | stream->stream_handle, | |
1379 | stream->trace->id, | |
1380 | stream->trace->session->id); | |
da412cde | 1381 | print_stream_indexes(stream); |
7591bab1 MD |
1382 | stream_put(stream); |
1383 | } | |
1384 | rcu_read_unlock(); | |
2a174661 | 1385 | } |