Commit | Line | Data |
---|---|---|
2a174661 | 1 | /* |
ab5be9fa MJ |
2 | * Copyright (C) 2013 Julien Desfossez <jdesfossez@efficios.com> |
3 | * Copyright (C) 2013 David Goulet <dgoulet@efficios.com> | |
4 | * Copyright (C) 2015 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
5 | * Copyright (C) 2019 Jérémie Galarneau <jeremie.galarneau@efficios.com> | |
2a174661 | 6 | * |
ab5be9fa | 7 | * SPDX-License-Identifier: GPL-2.0-only |
2a174661 | 8 | * |
2a174661 DG |
9 | */ |
10 | ||
6c1c0768 | 11 | #define _LGPL_SOURCE |
2a174661 | 12 | #include <common/common.h> |
7591bab1 | 13 | #include <common/defaults.h> |
8bb66c3c | 14 | #include <common/fs-handle.h> |
c35f9726 | 15 | #include <common/sessiond-comm/relayd.h> |
8bb66c3c | 16 | #include <common/utils.h> |
7591bab1 | 17 | #include <sys/stat.h> |
8bb66c3c | 18 | #include <urcu/rculist.h> |
2a174661 | 19 | |
7591bab1 | 20 | #include "lttng-relayd.h" |
2a174661 DG |
21 | #include "index.h" |
22 | #include "stream.h" | |
23 | #include "viewer-stream.h" | |
24 | ||
348a81dc JG |
25 | #include <sys/types.h> |
26 | #include <fcntl.h> | |
27 | ||
c35f9726 JG |
28 | #define FILE_IO_STACK_BUFFER_SIZE 65536 |
29 | ||
7591bab1 MD |
30 | /* Should be called with RCU read-side lock held. */ |
31 | bool stream_get(struct relay_stream *stream) | |
32 | { | |
ce4d4083 | 33 | return urcu_ref_get_unless_zero(&stream->ref); |
7591bab1 MD |
34 | } |
35 | ||
2a174661 | 36 | /* |
7591bab1 MD |
37 | * Get stream from stream id from the streams hash table. Return stream |
38 | * if found else NULL. A stream reference is taken when a stream is | |
39 | * returned. stream_put() must be called on that stream. | |
2a174661 | 40 | */ |
7591bab1 | 41 | struct relay_stream *stream_get_by_id(uint64_t stream_id) |
2a174661 DG |
42 | { |
43 | struct lttng_ht_node_u64 *node; | |
44 | struct lttng_ht_iter iter; | |
45 | struct relay_stream *stream = NULL; | |
46 | ||
7591bab1 MD |
47 | rcu_read_lock(); |
48 | lttng_ht_lookup(relay_streams_ht, &stream_id, &iter); | |
2a174661 | 49 | node = lttng_ht_iter_get_node_u64(&iter); |
7591bab1 | 50 | if (!node) { |
2a174661 DG |
51 | DBG("Relay stream %" PRIu64 " not found", stream_id); |
52 | goto end; | |
53 | } | |
54 | stream = caa_container_of(node, struct relay_stream, node); | |
7591bab1 MD |
55 | if (!stream_get(stream)) { |
56 | stream = NULL; | |
57 | } | |
2a174661 | 58 | end: |
7591bab1 | 59 | rcu_read_unlock(); |
2a174661 DG |
60 | return stream; |
61 | } | |
62 | ||
c35f9726 JG |
63 | static void stream_complete_rotation(struct relay_stream *stream) |
64 | { | |
65 | DBG("Rotation completed for stream %" PRIu64, stream->stream_handle); | |
f607fc46 MD |
66 | if (stream->ongoing_rotation.value.next_trace_chunk) { |
67 | tracefile_array_reset(stream->tfa); | |
68 | tracefile_array_commit_seq(stream->tfa, | |
69 | stream->index_received_seqcount); | |
70 | } | |
c35f9726 JG |
71 | lttng_trace_chunk_put(stream->trace_chunk); |
72 | stream->trace_chunk = stream->ongoing_rotation.value.next_trace_chunk; | |
73 | stream->ongoing_rotation = (typeof(stream->ongoing_rotation)) {}; | |
80516611 | 74 | stream->completed_rotation_count++; |
c35f9726 JG |
75 | } |
76 | ||
c35f9726 JG |
77 | static int stream_create_data_output_file_from_trace_chunk( |
78 | struct relay_stream *stream, | |
79 | struct lttng_trace_chunk *trace_chunk, | |
80 | bool force_unlink, | |
8bb66c3c | 81 | struct fs_handle **out_file) |
348a81dc | 82 | { |
8bb66c3c | 83 | int ret; |
c35f9726 | 84 | char stream_path[LTTNG_PATH_MAX]; |
348a81dc JG |
85 | enum lttng_trace_chunk_status status; |
86 | const int flags = O_RDWR | O_CREAT | O_TRUNC; | |
87 | const mode_t mode = S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP; | |
348a81dc JG |
88 | |
89 | ASSERT_LOCKED(stream->lock); | |
348a81dc | 90 | |
348a81dc | 91 | ret = utils_stream_file_path(stream->path_name, stream->channel_name, |
c35f9726 JG |
92 | stream->tracefile_size, stream->tracefile_current_index, |
93 | NULL, stream_path, sizeof(stream_path)); | |
348a81dc JG |
94 | if (ret < 0) { |
95 | goto end; | |
96 | } | |
97 | ||
c35f9726 JG |
98 | if (stream->tracefile_wrapped_around || force_unlink) { |
99 | /* | |
100 | * The on-disk ring-buffer has wrapped around. | |
101 | * Newly created stream files will replace existing files. Since | |
102 | * live clients may be consuming existing files, the file about | |
103 | * to be replaced is unlinked in order to not overwrite its | |
104 | * content. | |
105 | */ | |
106 | status = lttng_trace_chunk_unlink_file(trace_chunk, | |
107 | stream_path); | |
108 | if (status != LTTNG_TRACE_CHUNK_STATUS_OK) { | |
109 | PERROR("Failed to unlink stream file \"%s\" during trace file rotation", | |
110 | stream_path); | |
111 | /* | |
112 | * Don't abort if the file doesn't exist, it is | |
113 | * unexpected, but should not be a fatal error. | |
114 | */ | |
115 | if (errno != ENOENT) { | |
116 | ret = -1; | |
117 | goto end; | |
118 | } | |
119 | } | |
120 | } | |
121 | ||
8bb66c3c JG |
122 | status = lttng_trace_chunk_open_fs_handle(trace_chunk, stream_path, |
123 | flags, mode, out_file, false); | |
348a81dc JG |
124 | if (status != LTTNG_TRACE_CHUNK_STATUS_OK) { |
125 | ERR("Failed to open stream file \"%s\"", stream->channel_name); | |
126 | ret = -1; | |
127 | goto end; | |
128 | } | |
348a81dc JG |
129 | end: |
130 | return ret; | |
131 | } | |
132 | ||
c35f9726 JG |
133 | static int stream_rotate_data_file(struct relay_stream *stream) |
134 | { | |
135 | int ret = 0; | |
136 | ||
68c40154 MD |
137 | DBG("Rotating stream %" PRIu64 " data file with size %" PRIu64, |
138 | stream->stream_handle, stream->tracefile_size_current); | |
c35f9726 | 139 | |
8bb66c3c JG |
140 | if (stream->file) { |
141 | fs_handle_close(stream->file); | |
142 | stream->file = NULL; | |
c35f9726 JG |
143 | } |
144 | ||
145 | stream->tracefile_wrapped_around = false; | |
146 | stream->tracefile_current_index = 0; | |
147 | ||
148 | if (stream->ongoing_rotation.value.next_trace_chunk) { | |
c35f9726 JG |
149 | enum lttng_trace_chunk_status chunk_status; |
150 | ||
151 | chunk_status = lttng_trace_chunk_create_subdirectory( | |
152 | stream->ongoing_rotation.value.next_trace_chunk, | |
153 | stream->path_name); | |
154 | if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) { | |
155 | ret = -1; | |
156 | goto end; | |
157 | } | |
158 | ||
159 | /* Rotate the data file. */ | |
160 | ret = stream_create_data_output_file_from_trace_chunk(stream, | |
161 | stream->ongoing_rotation.value.next_trace_chunk, | |
8bb66c3c | 162 | false, &stream->file); |
c35f9726 JG |
163 | if (ret < 0) { |
164 | ERR("Failed to rotate stream data file"); | |
165 | goto end; | |
166 | } | |
167 | } | |
68c40154 MD |
168 | DBG("%s: reset tracefile_size_current for stream %" PRIu64 " was %" PRIu64, |
169 | __func__, stream->stream_handle, stream->tracefile_size_current); | |
c35f9726 JG |
170 | stream->tracefile_size_current = 0; |
171 | stream->pos_after_last_complete_data_index = 0; | |
172 | stream->ongoing_rotation.value.data_rotated = true; | |
173 | ||
174 | if (stream->ongoing_rotation.value.index_rotated) { | |
175 | /* Rotation completed; reset its state. */ | |
176 | stream_complete_rotation(stream); | |
177 | } | |
178 | end: | |
179 | return ret; | |
180 | } | |
181 | ||
f2aea36d JG |
182 | /* |
183 | * If too much data has been written in a tracefile before we received the | |
184 | * rotation command, we have to move the excess data to the new tracefile and | |
185 | * perform the rotation. This can happen because the control and data | |
186 | * connections are separate, the indexes as well as the commands arrive from | |
187 | * the control connection and we have no control over the order so we could be | |
188 | * in a situation where too much data has been received on the data connection | |
189 | * before the rotation command on the control connection arrives. | |
190 | */ | |
191 | static int rotate_truncate_stream(struct relay_stream *stream) | |
192 | { | |
193 | int ret; | |
194 | off_t lseek_ret, previous_stream_copy_origin; | |
195 | uint64_t copy_bytes_left, misplaced_data_size; | |
196 | bool acquired_reference; | |
8bb66c3c | 197 | struct fs_handle *previous_stream_file = NULL; |
f2aea36d JG |
198 | struct lttng_trace_chunk *previous_chunk = NULL; |
199 | ||
f3fe2a92 | 200 | if (!LTTNG_OPTIONAL_GET(stream->ongoing_rotation).next_trace_chunk) { |
4147107d JG |
201 | ERR("Protocol error encoutered in %s(): stream rotation " |
202 | "sequence number is before the current sequence number " | |
203 | "and the next trace chunk is unset. Honoring this " | |
204 | "rotation command would result in data loss", | |
205 | __FUNCTION__); | |
206 | ret = -1; | |
207 | goto end; | |
208 | } | |
209 | ||
f2aea36d JG |
210 | ASSERT_LOCKED(stream->lock); |
211 | /* | |
212 | * Acquire a reference to the current trace chunk to ensure | |
213 | * it is not reclaimed when `stream_rotate_data_file` is called. | |
214 | * Failing to do so would violate the contract of the trace | |
215 | * chunk API as an active file descriptor would outlive the | |
216 | * trace chunk. | |
217 | */ | |
218 | acquired_reference = lttng_trace_chunk_get(stream->trace_chunk); | |
219 | assert(acquired_reference); | |
220 | previous_chunk = stream->trace_chunk; | |
221 | ||
222 | /* | |
223 | * Steal the stream's reference to its stream_fd. A new | |
224 | * stream_fd will be created when the rotation completes and | |
225 | * the orinal stream_fd will be used to copy the "extra" data | |
226 | * to the new file. | |
227 | */ | |
8bb66c3c JG |
228 | assert(stream->file); |
229 | previous_stream_file = stream->file; | |
230 | stream->file = NULL; | |
f2aea36d JG |
231 | |
232 | assert(!stream->is_metadata); | |
233 | assert(stream->tracefile_size_current > | |
234 | stream->pos_after_last_complete_data_index); | |
235 | misplaced_data_size = stream->tracefile_size_current - | |
236 | stream->pos_after_last_complete_data_index; | |
237 | copy_bytes_left = misplaced_data_size; | |
238 | previous_stream_copy_origin = stream->pos_after_last_complete_data_index; | |
239 | ||
240 | ret = stream_rotate_data_file(stream); | |
241 | if (ret) { | |
242 | goto end; | |
243 | } | |
244 | ||
8bb66c3c | 245 | assert(stream->file); |
f2aea36d JG |
246 | /* |
247 | * Seek the current tracefile to the position at which the rotation | |
248 | * should have occurred. | |
249 | */ | |
8bb66c3c | 250 | lseek_ret = fs_handle_seek(previous_stream_file, previous_stream_copy_origin, SEEK_SET); |
f2aea36d JG |
251 | if (lseek_ret < 0) { |
252 | PERROR("Failed to seek to offset %" PRIu64 | |
253 | " while copying extra data received before a stream rotation", | |
254 | (uint64_t) previous_stream_copy_origin); | |
255 | ret = -1; | |
256 | goto end; | |
257 | } | |
258 | ||
259 | /* Move data from the old file to the new file. */ | |
260 | while (copy_bytes_left) { | |
261 | ssize_t io_ret; | |
262 | char copy_buffer[FILE_IO_STACK_BUFFER_SIZE]; | |
263 | const off_t copy_size_this_pass = min_t( | |
264 | off_t, copy_bytes_left, sizeof(copy_buffer)); | |
265 | ||
8bb66c3c | 266 | io_ret = fs_handle_read(previous_stream_file, copy_buffer, |
f2aea36d JG |
267 | copy_size_this_pass); |
268 | if (io_ret < (ssize_t) copy_size_this_pass) { | |
269 | if (io_ret == -1) { | |
270 | PERROR("Failed to read %" PRIu64 | |
8bb66c3c | 271 | " bytes from previous stream file in %s(), returned %zi: stream id = %" PRIu64, |
f2aea36d | 272 | copy_size_this_pass, |
8bb66c3c JG |
273 | __FUNCTION__, io_ret, |
274 | stream->stream_handle); | |
f2aea36d JG |
275 | } else { |
276 | ERR("Failed to read %" PRIu64 | |
8bb66c3c | 277 | " bytes from previous stream file in %s(), returned %zi: stream id = %" PRIu64, |
f2aea36d | 278 | copy_size_this_pass, |
8bb66c3c JG |
279 | __FUNCTION__, io_ret, |
280 | stream->stream_handle); | |
f2aea36d JG |
281 | } |
282 | ret = -1; | |
283 | goto end; | |
284 | } | |
285 | ||
8bb66c3c JG |
286 | io_ret = fs_handle_write( |
287 | stream->file, copy_buffer, copy_size_this_pass); | |
f2aea36d JG |
288 | if (io_ret < (ssize_t) copy_size_this_pass) { |
289 | if (io_ret == -1) { | |
290 | PERROR("Failed to write %" PRIu64 | |
8bb66c3c | 291 | " bytes from previous stream file in %s(), returned %zi: stream id = %" PRIu64, |
f2aea36d | 292 | copy_size_this_pass, |
8bb66c3c JG |
293 | __FUNCTION__, io_ret, |
294 | stream->stream_handle); | |
f2aea36d JG |
295 | } else { |
296 | ERR("Failed to write %" PRIu64 | |
8bb66c3c | 297 | " bytes from previous stream file in %s(), returned %zi: stream id = %" PRIu64, |
f2aea36d | 298 | copy_size_this_pass, |
8bb66c3c JG |
299 | __FUNCTION__, io_ret, |
300 | stream->stream_handle); | |
f2aea36d JG |
301 | } |
302 | ret = -1; | |
303 | goto end; | |
304 | } | |
305 | copy_bytes_left -= copy_size_this_pass; | |
306 | } | |
307 | ||
308 | /* Truncate the file to get rid of the excess data. */ | |
8bb66c3c JG |
309 | ret = fs_handle_truncate( |
310 | previous_stream_file, previous_stream_copy_origin); | |
f2aea36d JG |
311 | if (ret) { |
312 | PERROR("Failed to truncate current stream file to offset %" PRIu64, | |
313 | previous_stream_copy_origin); | |
314 | goto end; | |
315 | } | |
316 | ||
317 | /* | |
318 | * Update the offset and FD of all the eventual indexes created by the | |
319 | * data connection before the rotation command arrived. | |
320 | */ | |
321 | ret = relay_index_switch_all_files(stream); | |
322 | if (ret < 0) { | |
323 | ERR("Failed to rotate index file"); | |
324 | goto end; | |
325 | } | |
326 | ||
327 | stream->tracefile_size_current = misplaced_data_size; | |
328 | /* Index and data contents are back in sync. */ | |
329 | stream->pos_after_last_complete_data_index = 0; | |
330 | ret = 0; | |
331 | end: | |
332 | lttng_trace_chunk_put(previous_chunk); | |
f2aea36d JG |
333 | return ret; |
334 | } | |
335 | ||
c35f9726 JG |
336 | /* |
337 | * Check if a stream's data file (as opposed to index) should be rotated | |
338 | * (for session rotation). | |
339 | * Must be called with the stream lock held. | |
340 | * | |
341 | * Return 0 on success, a negative value on error. | |
342 | */ | |
343 | static int try_rotate_stream_data(struct relay_stream *stream) | |
344 | { | |
345 | int ret = 0; | |
346 | ||
347 | if (caa_likely(!stream->ongoing_rotation.is_set)) { | |
348 | /* No rotation expected. */ | |
349 | goto end; | |
350 | } | |
351 | ||
352 | if (stream->ongoing_rotation.value.data_rotated) { | |
353 | /* Rotation of the data file has already occurred. */ | |
354 | goto end; | |
355 | } | |
356 | ||
68c40154 MD |
357 | DBG("%s: Stream %" PRIu64 |
358 | " (rotate_at_index_packet_seq_num = %" PRIu64 | |
359 | ", rotate_at_prev_data_net_seq = %" PRIu64 | |
360 | ", prev_data_seq = %" PRIu64 ")", | |
361 | __func__, stream->stream_handle, | |
362 | stream->ongoing_rotation.value.packet_seq_num, | |
363 | stream->ongoing_rotation.value.prev_data_net_seq, | |
364 | stream->prev_data_seq); | |
365 | ||
c35f9726 | 366 | if (stream->prev_data_seq == -1ULL || |
0f83d1cc MD |
367 | stream->ongoing_rotation.value.prev_data_net_seq == -1ULL || |
368 | stream->prev_data_seq < | |
369 | stream->ongoing_rotation.value.prev_data_net_seq) { | |
c35f9726 JG |
370 | /* |
371 | * The next packet that will be written is not part of the next | |
372 | * chunk yet. | |
373 | */ | |
0f83d1cc MD |
374 | DBG("Stream %" PRIu64 " data not yet ready for rotation " |
375 | "(rotate_at_index_packet_seq_num = %" PRIu64 | |
376 | ", rotate_at_prev_data_net_seq = %" PRIu64 | |
c35f9726 JG |
377 | ", prev_data_seq = %" PRIu64 ")", |
378 | stream->stream_handle, | |
0f83d1cc MD |
379 | stream->ongoing_rotation.value.packet_seq_num, |
380 | stream->ongoing_rotation.value.prev_data_net_seq, | |
c35f9726 JG |
381 | stream->prev_data_seq); |
382 | goto end; | |
0f83d1cc | 383 | } else if (stream->prev_data_seq > stream->ongoing_rotation.value.prev_data_net_seq) { |
c35f9726 JG |
384 | /* |
385 | * prev_data_seq is checked here since indexes and rotation | |
386 | * commands are serialized with respect to each other. | |
387 | */ | |
388 | DBG("Rotation after too much data has been written in tracefile " | |
389 | "for stream %" PRIu64 ", need to truncate before " | |
390 | "rotating", stream->stream_handle); | |
391 | ret = rotate_truncate_stream(stream); | |
392 | if (ret) { | |
393 | ERR("Failed to truncate stream"); | |
394 | goto end; | |
395 | } | |
396 | } else { | |
397 | ret = stream_rotate_data_file(stream); | |
398 | } | |
399 | ||
400 | end: | |
401 | return ret; | |
402 | } | |
403 | ||
404 | /* | |
405 | * Close the current index file if it is open, and create a new one. | |
406 | * | |
407 | * Return 0 on success, -1 on error. | |
408 | */ | |
409 | static int create_index_file(struct relay_stream *stream, | |
410 | struct lttng_trace_chunk *chunk) | |
411 | { | |
412 | int ret; | |
413 | uint32_t major, minor; | |
414 | char *index_subpath = NULL; | |
3a735fa7 | 415 | enum lttng_trace_chunk_status status; |
c35f9726 JG |
416 | |
417 | ASSERT_LOCKED(stream->lock); | |
418 | ||
419 | /* Put ref on previous index_file. */ | |
420 | if (stream->index_file) { | |
421 | lttng_index_file_put(stream->index_file); | |
422 | stream->index_file = NULL; | |
423 | } | |
424 | major = stream->trace->session->major; | |
425 | minor = stream->trace->session->minor; | |
426 | ||
427 | if (!chunk) { | |
428 | ret = 0; | |
429 | goto end; | |
430 | } | |
431 | ret = asprintf(&index_subpath, "%s/%s", stream->path_name, | |
432 | DEFAULT_INDEX_DIR); | |
433 | if (ret < 0) { | |
434 | goto end; | |
435 | } | |
436 | ||
3a735fa7 | 437 | status = lttng_trace_chunk_create_subdirectory(chunk, |
c35f9726 JG |
438 | index_subpath); |
439 | free(index_subpath); | |
3a735fa7 MD |
440 | if (status != LTTNG_TRACE_CHUNK_STATUS_OK) { |
441 | ret = -1; | |
c35f9726 JG |
442 | goto end; |
443 | } | |
3ff5c5db | 444 | status = lttng_index_file_create_from_trace_chunk( |
c35f9726 JG |
445 | chunk, stream->path_name, |
446 | stream->channel_name, stream->tracefile_size, | |
447 | stream->tracefile_current_index, | |
448 | lttng_to_index_major(major, minor), | |
3ff5c5db MD |
449 | lttng_to_index_minor(major, minor), true, |
450 | &stream->index_file); | |
451 | if (status != LTTNG_TRACE_CHUNK_STATUS_OK) { | |
c35f9726 JG |
452 | ret = -1; |
453 | goto end; | |
454 | } | |
455 | ||
456 | ret = 0; | |
457 | ||
458 | end: | |
459 | return ret; | |
460 | } | |
461 | ||
462 | /* | |
463 | * Check if a stream's index file should be rotated (for session rotation). | |
464 | * Must be called with the stream lock held. | |
465 | * | |
466 | * Return 0 on success, a negative value on error. | |
467 | */ | |
468 | static int try_rotate_stream_index(struct relay_stream *stream) | |
469 | { | |
470 | int ret = 0; | |
471 | ||
472 | if (!stream->ongoing_rotation.is_set) { | |
473 | /* No rotation expected. */ | |
474 | goto end; | |
475 | } | |
476 | ||
477 | if (stream->ongoing_rotation.value.index_rotated) { | |
478 | /* Rotation of the index has already occurred. */ | |
479 | goto end; | |
480 | } | |
481 | ||
68c40154 MD |
482 | DBG("%s: Stream %" PRIu64 |
483 | " (rotate_at_packet_seq_num = %" PRIu64 | |
484 | ", received_packet_seq_num = " | |
485 | "(value = %" PRIu64 ", is_set = %" PRIu8 "))", | |
486 | __func__, stream->stream_handle, | |
487 | stream->ongoing_rotation.value.packet_seq_num, | |
488 | stream->received_packet_seq_num.value, | |
489 | stream->received_packet_seq_num.is_set); | |
490 | ||
0f83d1cc MD |
491 | if (!stream->received_packet_seq_num.is_set || |
492 | LTTNG_OPTIONAL_GET(stream->received_packet_seq_num) + 1 < | |
493 | stream->ongoing_rotation.value.packet_seq_num) { | |
494 | DBG("Stream %" PRIu64 " index not yet ready for rotation " | |
495 | "(rotate_at_packet_seq_num = %" PRIu64 | |
496 | ", received_packet_seq_num = " | |
497 | "(value = %" PRIu64 ", is_set = %" PRIu8 "))", | |
c35f9726 | 498 | stream->stream_handle, |
0f83d1cc MD |
499 | stream->ongoing_rotation.value.packet_seq_num, |
500 | stream->received_packet_seq_num.value, | |
501 | stream->received_packet_seq_num.is_set); | |
c35f9726 JG |
502 | goto end; |
503 | } else { | |
0f83d1cc MD |
504 | /* |
505 | * The next index belongs to the new trace chunk; rotate. | |
506 | * In overwrite mode, the packet seq num may jump over the | |
507 | * rotation position. | |
508 | */ | |
509 | assert(LTTNG_OPTIONAL_GET(stream->received_packet_seq_num) + 1 >= | |
510 | stream->ongoing_rotation.value.packet_seq_num); | |
c35f9726 JG |
511 | DBG("Rotating stream %" PRIu64 " index file", |
512 | stream->stream_handle); | |
f607fc46 MD |
513 | if (stream->index_file) { |
514 | lttng_index_file_put(stream->index_file); | |
515 | stream->index_file = NULL; | |
516 | } | |
c35f9726 JG |
517 | stream->ongoing_rotation.value.index_rotated = true; |
518 | ||
0f83d1cc MD |
519 | /* |
520 | * Set the rotation pivot position for the data, now that we have the | |
521 | * net_seq_num matching the packet_seq_num index pivot position. | |
522 | */ | |
523 | stream->ongoing_rotation.value.prev_data_net_seq = | |
524 | stream->prev_index_seq; | |
c35f9726 JG |
525 | if (stream->ongoing_rotation.value.data_rotated && |
526 | stream->ongoing_rotation.value.index_rotated) { | |
527 | /* Rotation completed; reset its state. */ | |
528 | DBG("Rotation completed for stream %" PRIu64, | |
529 | stream->stream_handle); | |
530 | stream_complete_rotation(stream); | |
531 | } | |
532 | } | |
533 | ||
534 | end: | |
535 | return ret; | |
536 | } | |
537 | ||
348a81dc JG |
538 | static int stream_set_trace_chunk(struct relay_stream *stream, |
539 | struct lttng_trace_chunk *chunk) | |
540 | { | |
541 | int ret = 0; | |
542 | enum lttng_trace_chunk_status status; | |
543 | bool acquired_reference; | |
544 | ||
348a81dc JG |
545 | status = lttng_trace_chunk_create_subdirectory(chunk, |
546 | stream->path_name); | |
547 | if (status != LTTNG_TRACE_CHUNK_STATUS_OK) { | |
548 | ret = -1; | |
549 | goto end; | |
550 | } | |
551 | ||
552 | lttng_trace_chunk_put(stream->trace_chunk); | |
553 | acquired_reference = lttng_trace_chunk_get(chunk); | |
554 | assert(acquired_reference); | |
555 | stream->trace_chunk = chunk; | |
c35f9726 | 556 | |
8bb66c3c JG |
557 | if (stream->file) { |
558 | fs_handle_close(stream->file); | |
559 | stream->file = NULL; | |
c35f9726 JG |
560 | } |
561 | ret = stream_create_data_output_file_from_trace_chunk(stream, chunk, | |
8bb66c3c | 562 | false, &stream->file); |
348a81dc | 563 | end: |
348a81dc JG |
564 | return ret; |
565 | } | |
566 | ||
2a174661 | 567 | /* |
7591bab1 | 568 | * We keep ownership of path_name and channel_name. |
2a174661 | 569 | */ |
7591bab1 MD |
570 | struct relay_stream *stream_create(struct ctf_trace *trace, |
571 | uint64_t stream_handle, char *path_name, | |
572 | char *channel_name, uint64_t tracefile_size, | |
348a81dc | 573 | uint64_t tracefile_count) |
2a174661 | 574 | { |
7591bab1 MD |
575 | int ret; |
576 | struct relay_stream *stream = NULL; | |
577 | struct relay_session *session = trace->session; | |
348a81dc JG |
578 | bool acquired_reference = false; |
579 | struct lttng_trace_chunk *current_trace_chunk; | |
2a174661 | 580 | |
7591bab1 MD |
581 | stream = zmalloc(sizeof(struct relay_stream)); |
582 | if (stream == NULL) { | |
583 | PERROR("relay stream zmalloc"); | |
7591bab1 MD |
584 | goto error_no_alloc; |
585 | } | |
2a174661 | 586 | |
7591bab1 | 587 | stream->stream_handle = stream_handle; |
a8f9f353 | 588 | stream->prev_data_seq = -1ULL; |
7a45c7e6 | 589 | stream->prev_index_seq = -1ULL; |
bda7c7b9 | 590 | stream->last_net_seq_num = -1ULL; |
7591bab1 MD |
591 | stream->ctf_stream_id = -1ULL; |
592 | stream->tracefile_size = tracefile_size; | |
593 | stream->tracefile_count = tracefile_count; | |
594 | stream->path_name = path_name; | |
595 | stream->channel_name = channel_name; | |
2f9c3030 | 596 | stream->beacon_ts_end = -1ULL; |
7591bab1 MD |
597 | lttng_ht_node_init_u64(&stream->node, stream->stream_handle); |
598 | pthread_mutex_init(&stream->lock, NULL); | |
7591bab1 MD |
599 | urcu_ref_init(&stream->ref); |
600 | ctf_trace_get(trace); | |
601 | stream->trace = trace; | |
2a174661 | 602 | |
348a81dc JG |
603 | pthread_mutex_lock(&trace->session->lock); |
604 | current_trace_chunk = trace->session->current_trace_chunk; | |
605 | if (current_trace_chunk) { | |
606 | acquired_reference = lttng_trace_chunk_get(current_trace_chunk); | |
607 | } | |
608 | pthread_mutex_unlock(&trace->session->lock); | |
609 | if (!acquired_reference) { | |
610 | ERR("Cannot create stream for channel \"%s\" as a reference to the session's current trace chunk could not be acquired", | |
611 | channel_name); | |
7591bab1 MD |
612 | ret = -1; |
613 | goto end; | |
2a174661 DG |
614 | } |
615 | ||
348a81dc JG |
616 | stream->indexes_ht = lttng_ht_new(0, LTTNG_HT_TYPE_U64); |
617 | if (!stream->indexes_ht) { | |
618 | ERR("Cannot created indexes_ht"); | |
619 | ret = -1; | |
7591bab1 MD |
620 | goto end; |
621 | } | |
2a174661 | 622 | |
c35f9726 | 623 | pthread_mutex_lock(&stream->lock); |
348a81dc | 624 | ret = stream_set_trace_chunk(stream, current_trace_chunk); |
c35f9726 | 625 | pthread_mutex_unlock(&stream->lock); |
348a81dc JG |
626 | if (ret) { |
627 | ERR("Failed to set the current trace chunk of session \"%s\" on newly created stream of channel \"%s\"", | |
628 | trace->session->session_name, | |
629 | stream->channel_name); | |
7591bab1 MD |
630 | ret = -1; |
631 | goto end; | |
2a174661 | 632 | } |
a44ca2ca MD |
633 | stream->tfa = tracefile_array_create(stream->tracefile_count); |
634 | if (!stream->tfa) { | |
635 | ret = -1; | |
636 | goto end; | |
637 | } | |
7591bab1 | 638 | |
348a81dc JG |
639 | stream->is_metadata = !strcmp(stream->channel_name, |
640 | DEFAULT_METADATA_NAME); | |
7591bab1 MD |
641 | stream->in_recv_list = true; |
642 | ||
643 | /* | |
644 | * Add the stream in the recv list of the session. Once the end stream | |
645 | * message is received, all session streams are published. | |
646 | */ | |
647 | pthread_mutex_lock(&session->recv_list_lock); | |
648 | cds_list_add_rcu(&stream->recv_node, &session->recv_list); | |
649 | session->stream_count++; | |
650 | pthread_mutex_unlock(&session->recv_list_lock); | |
651 | ||
652 | /* | |
653 | * Both in the ctf_trace object and the global stream ht since the data | |
654 | * side of the relayd does not have the concept of session. | |
655 | */ | |
656 | lttng_ht_add_unique_u64(relay_streams_ht, &stream->node); | |
77f7bd85 | 657 | stream->in_stream_ht = true; |
2a174661 | 658 | |
7591bab1 MD |
659 | DBG("Relay new stream added %s with ID %" PRIu64, stream->channel_name, |
660 | stream->stream_handle); | |
661 | ret = 0; | |
662 | ||
663 | end: | |
664 | if (ret) { | |
8bb66c3c JG |
665 | if (stream->file) { |
666 | fs_handle_close(stream->file); | |
667 | stream->file = NULL; | |
2a174661 | 668 | } |
7591bab1 MD |
669 | stream_put(stream); |
670 | stream = NULL; | |
2a174661 | 671 | } |
317eadef JG |
672 | if (acquired_reference) { |
673 | lttng_trace_chunk_put(current_trace_chunk); | |
674 | } | |
7591bab1 | 675 | return stream; |
2a174661 | 676 | |
7591bab1 MD |
677 | error_no_alloc: |
678 | /* | |
679 | * path_name and channel_name need to be freed explicitly here | |
680 | * because we cannot rely on stream_put(). | |
681 | */ | |
682 | free(path_name); | |
683 | free(channel_name); | |
684 | return NULL; | |
685 | } | |
686 | ||
687 | /* | |
688 | * Called with the session lock held. | |
689 | */ | |
690 | void stream_publish(struct relay_stream *stream) | |
691 | { | |
692 | struct relay_session *session; | |
693 | ||
694 | pthread_mutex_lock(&stream->lock); | |
695 | if (stream->published) { | |
696 | goto unlock; | |
2a174661 DG |
697 | } |
698 | ||
7591bab1 | 699 | session = stream->trace->session; |
2a174661 | 700 | |
7591bab1 MD |
701 | pthread_mutex_lock(&session->recv_list_lock); |
702 | if (stream->in_recv_list) { | |
703 | cds_list_del_rcu(&stream->recv_node); | |
704 | stream->in_recv_list = false; | |
705 | } | |
706 | pthread_mutex_unlock(&session->recv_list_lock); | |
2a174661 | 707 | |
7591bab1 MD |
708 | pthread_mutex_lock(&stream->trace->stream_list_lock); |
709 | cds_list_add_rcu(&stream->stream_node, &stream->trace->stream_list); | |
710 | pthread_mutex_unlock(&stream->trace->stream_list_lock); | |
2a174661 | 711 | |
7591bab1 MD |
712 | stream->published = true; |
713 | unlock: | |
2a174661 | 714 | pthread_mutex_unlock(&stream->lock); |
2a174661 DG |
715 | } |
716 | ||
7591bab1 | 717 | /* |
77f7bd85 | 718 | * Stream must be protected by holding the stream lock or by virtue of being |
ce4d4083 | 719 | * called from stream_destroy. |
7591bab1 MD |
720 | */ |
721 | static void stream_unpublish(struct relay_stream *stream) | |
2a174661 | 722 | { |
77f7bd85 MD |
723 | if (stream->in_stream_ht) { |
724 | struct lttng_ht_iter iter; | |
725 | int ret; | |
726 | ||
727 | iter.iter.node = &stream->node.node; | |
728 | ret = lttng_ht_del(relay_streams_ht, &iter); | |
729 | assert(!ret); | |
730 | stream->in_stream_ht = false; | |
731 | } | |
732 | if (stream->published) { | |
733 | pthread_mutex_lock(&stream->trace->stream_list_lock); | |
734 | cds_list_del_rcu(&stream->stream_node); | |
735 | pthread_mutex_unlock(&stream->trace->stream_list_lock); | |
736 | stream->published = false; | |
7591bab1 | 737 | } |
7591bab1 MD |
738 | } |
739 | ||
740 | static void stream_destroy(struct relay_stream *stream) | |
741 | { | |
742 | if (stream->indexes_ht) { | |
49e614cb MD |
743 | /* |
744 | * Calling lttng_ht_destroy in call_rcu worker thread so | |
745 | * we don't hold the RCU read-side lock while calling | |
746 | * it. | |
747 | */ | |
7591bab1 MD |
748 | lttng_ht_destroy(stream->indexes_ht); |
749 | } | |
a44ca2ca MD |
750 | if (stream->tfa) { |
751 | tracefile_array_destroy(stream->tfa); | |
752 | } | |
7591bab1 MD |
753 | free(stream->path_name); |
754 | free(stream->channel_name); | |
755 | free(stream); | |
756 | } | |
757 | ||
758 | static void stream_destroy_rcu(struct rcu_head *rcu_head) | |
759 | { | |
760 | struct relay_stream *stream = | |
761 | caa_container_of(rcu_head, struct relay_stream, rcu_node); | |
762 | ||
763 | stream_destroy(stream); | |
764 | } | |
765 | ||
766 | /* | |
767 | * No need to take stream->lock since this is only called on the final | |
768 | * stream_put which ensures that a single thread may act on the stream. | |
7591bab1 MD |
769 | */ |
770 | static void stream_release(struct urcu_ref *ref) | |
771 | { | |
772 | struct relay_stream *stream = | |
773 | caa_container_of(ref, struct relay_stream, ref); | |
774 | struct relay_session *session; | |
2a174661 | 775 | |
7591bab1 MD |
776 | session = stream->trace->session; |
777 | ||
778 | DBG("Releasing stream id %" PRIu64, stream->stream_handle); | |
779 | ||
780 | pthread_mutex_lock(&session->recv_list_lock); | |
781 | session->stream_count--; | |
782 | if (stream->in_recv_list) { | |
783 | cds_list_del_rcu(&stream->recv_node); | |
784 | stream->in_recv_list = false; | |
785 | } | |
786 | pthread_mutex_unlock(&session->recv_list_lock); | |
2a174661 | 787 | |
7591bab1 MD |
788 | stream_unpublish(stream); |
789 | ||
8bb66c3c JG |
790 | if (stream->file) { |
791 | fs_handle_close(stream->file); | |
792 | stream->file = NULL; | |
7591bab1 | 793 | } |
f8f3885c MD |
794 | if (stream->index_file) { |
795 | lttng_index_file_put(stream->index_file); | |
796 | stream->index_file = NULL; | |
7591bab1 MD |
797 | } |
798 | if (stream->trace) { | |
799 | ctf_trace_put(stream->trace); | |
800 | stream->trace = NULL; | |
801 | } | |
c35f9726 | 802 | stream_complete_rotation(stream); |
348a81dc JG |
803 | lttng_trace_chunk_put(stream->trace_chunk); |
804 | stream->trace_chunk = NULL; | |
7591bab1 MD |
805 | |
806 | call_rcu(&stream->rcu_node, stream_destroy_rcu); | |
2a174661 DG |
807 | } |
808 | ||
7591bab1 | 809 | void stream_put(struct relay_stream *stream) |
2a174661 | 810 | { |
7591bab1 | 811 | rcu_read_lock(); |
7591bab1 MD |
812 | assert(stream->ref.refcount != 0); |
813 | /* | |
814 | * Wait until we have processed all the stream packets before | |
815 | * actually putting our last stream reference. | |
816 | */ | |
7591bab1 | 817 | urcu_ref_put(&stream->ref, stream_release); |
7591bab1 MD |
818 | rcu_read_unlock(); |
819 | } | |
820 | ||
c35f9726 JG |
821 | int stream_set_pending_rotation(struct relay_stream *stream, |
822 | struct lttng_trace_chunk *next_trace_chunk, | |
823 | uint64_t rotation_sequence_number) | |
824 | { | |
825 | int ret = 0; | |
826 | const struct relay_stream_rotation rotation = { | |
0f83d1cc MD |
827 | .data_rotated = false, |
828 | .index_rotated = false, | |
829 | .packet_seq_num = rotation_sequence_number, | |
830 | .prev_data_net_seq = -1ULL, | |
c35f9726 JG |
831 | .next_trace_chunk = next_trace_chunk, |
832 | }; | |
833 | ||
834 | if (stream->ongoing_rotation.is_set) { | |
835 | ERR("Attempted to set a pending rotation on a stream already being rotated (protocol error)"); | |
836 | ret = -1; | |
837 | goto end; | |
838 | } | |
839 | ||
840 | if (next_trace_chunk) { | |
841 | const bool reference_acquired = | |
842 | lttng_trace_chunk_get(next_trace_chunk); | |
843 | ||
844 | assert(reference_acquired); | |
845 | } | |
846 | LTTNG_OPTIONAL_SET(&stream->ongoing_rotation, rotation); | |
847 | ||
0f83d1cc MD |
848 | DBG("Setting pending rotation: stream_id = %" PRIu64 |
849 | ", rotate_at_packet_seq_num = %" PRIu64, | |
c35f9726 JG |
850 | stream->stream_handle, rotation_sequence_number); |
851 | if (stream->is_metadata) { | |
852 | /* | |
853 | * A metadata stream has no index; consider it already rotated. | |
854 | */ | |
855 | stream->ongoing_rotation.value.index_rotated = true; | |
f607fc46 MD |
856 | if (next_trace_chunk) { |
857 | /* | |
858 | * The metadata will be received again in the new chunk. | |
859 | */ | |
860 | stream->metadata_received = 0; | |
861 | } | |
c35f9726 JG |
862 | ret = stream_rotate_data_file(stream); |
863 | } else { | |
0f83d1cc | 864 | ret = try_rotate_stream_index(stream); |
c35f9726 JG |
865 | if (ret < 0) { |
866 | goto end; | |
867 | } | |
868 | ||
0f83d1cc | 869 | ret = try_rotate_stream_data(stream); |
c35f9726 JG |
870 | if (ret < 0) { |
871 | goto end; | |
872 | } | |
873 | } | |
874 | end: | |
875 | return ret; | |
876 | } | |
877 | ||
bda7c7b9 | 878 | void try_stream_close(struct relay_stream *stream) |
7591bab1 | 879 | { |
98ba050e JR |
880 | bool session_aborted; |
881 | struct relay_session *session = stream->trace->session; | |
882 | ||
bda7c7b9 | 883 | DBG("Trying to close stream %" PRIu64, stream->stream_handle); |
98ba050e JR |
884 | |
885 | pthread_mutex_lock(&session->lock); | |
886 | session_aborted = session->aborted; | |
887 | pthread_mutex_unlock(&session->lock); | |
888 | ||
7591bab1 | 889 | pthread_mutex_lock(&stream->lock); |
bda7c7b9 JG |
890 | /* |
891 | * Can be called concurently by connection close and reception of last | |
892 | * pending data. | |
893 | */ | |
894 | if (stream->closed) { | |
895 | pthread_mutex_unlock(&stream->lock); | |
896 | DBG("closing stream %" PRIu64 " aborted since it is already marked as closed", stream->stream_handle); | |
897 | return; | |
898 | } | |
899 | ||
900 | stream->close_requested = true; | |
3d07a857 MD |
901 | |
902 | if (stream->last_net_seq_num == -1ULL) { | |
903 | /* | |
904 | * Handle connection close without explicit stream close | |
905 | * command. | |
906 | * | |
907 | * We can be clever about indexes partially received in | |
908 | * cases where we received the data socket part, but not | |
909 | * the control socket part: since we're currently closing | |
910 | * the stream on behalf of the control socket, we *know* | |
911 | * there won't be any more control information for this | |
912 | * socket. Therefore, we can destroy all indexes for | |
913 | * which we have received only the file descriptor (from | |
914 | * data socket). This takes care of consumerd crashes | |
915 | * between sending the data and control information for | |
916 | * a packet. Since those are sent in that order, we take | |
917 | * care of consumerd crashes. | |
918 | */ | |
5312a3ed | 919 | DBG("relay_index_close_partial_fd"); |
3d07a857 MD |
920 | relay_index_close_partial_fd(stream); |
921 | /* | |
922 | * Use the highest net_seq_num we currently have pending | |
923 | * As end of stream indicator. Leave last_net_seq_num | |
924 | * at -1ULL if we cannot find any index. | |
925 | */ | |
926 | stream->last_net_seq_num = relay_index_find_last(stream); | |
5312a3ed | 927 | DBG("Updating stream->last_net_seq_num to %" PRIu64, stream->last_net_seq_num); |
3d07a857 MD |
928 | /* Fall-through into the next check. */ |
929 | } | |
930 | ||
bda7c7b9 | 931 | if (stream->last_net_seq_num != -1ULL && |
a8f9f353 | 932 | ((int64_t) (stream->prev_data_seq - stream->last_net_seq_num)) < 0 |
98ba050e | 933 | && !session_aborted) { |
3d07a857 MD |
934 | /* |
935 | * Don't close since we still have data pending. This | |
936 | * handles cases where an explicit close command has | |
937 | * been received for this stream, and cases where the | |
938 | * connection has been closed, and we are awaiting for | |
939 | * index information from the data socket. It is | |
940 | * therefore expected that all the index fd information | |
941 | * we need has already been received on the control | |
942 | * socket. Matching index information from data socket | |
943 | * should be Expected Soon(TM). | |
944 | * | |
945 | * TODO: We should implement a timer to garbage collect | |
946 | * streams after a timeout to be resilient against a | |
947 | * consumerd implementation that would not match this | |
948 | * expected behavior. | |
949 | */ | |
bda7c7b9 JG |
950 | pthread_mutex_unlock(&stream->lock); |
951 | DBG("closing stream %" PRIu64 " aborted since it still has data pending", stream->stream_handle); | |
952 | return; | |
953 | } | |
3d07a857 MD |
954 | /* |
955 | * We received all the indexes we can expect. | |
956 | */ | |
77f7bd85 | 957 | stream_unpublish(stream); |
2229a09c | 958 | stream->closed = true; |
bda7c7b9 | 959 | /* Relay indexes are only used by the "consumer/sessiond" end. */ |
7591bab1 | 960 | relay_index_close_all(stream); |
d91bc249 MD |
961 | |
962 | /* | |
963 | * If we are closed by an application exiting (per-pid buffers), | |
964 | * we need to put our reference on the stream trace chunk right | |
965 | * away, because otherwise still holding the reference on the | |
966 | * trace chunk could allow a viewer stream (which holds a reference | |
967 | * to the stream) to postpone destroy waiting for the chunk to cease | |
968 | * to exist endlessly until the viewer is detached. | |
969 | */ | |
970 | ||
971 | /* Put stream fd before put chunk. */ | |
8bb66c3c JG |
972 | if (stream->file) { |
973 | fs_handle_close(stream->file); | |
974 | stream->file = NULL; | |
d91bc249 MD |
975 | } |
976 | if (stream->index_file) { | |
977 | lttng_index_file_put(stream->index_file); | |
978 | stream->index_file = NULL; | |
979 | } | |
980 | lttng_trace_chunk_put(stream->trace_chunk); | |
981 | stream->trace_chunk = NULL; | |
7591bab1 | 982 | pthread_mutex_unlock(&stream->lock); |
bda7c7b9 | 983 | DBG("Succeeded in closing stream %" PRIu64, stream->stream_handle); |
7591bab1 MD |
984 | stream_put(stream); |
985 | } | |
986 | ||
c35f9726 JG |
987 | int stream_init_packet(struct relay_stream *stream, size_t packet_size, |
988 | bool *file_rotated) | |
989 | { | |
990 | int ret = 0; | |
991 | ||
992 | ASSERT_LOCKED(stream->lock); | |
1ad1103b | 993 | |
8bb66c3c | 994 | if (!stream->file || !stream->trace_chunk) { |
1ad1103b JG |
995 | ERR("Protocol error: received a packet for a stream that doesn't have a current trace chunk: stream_id = %" PRIu64 ", channel_name = %s", |
996 | stream->stream_handle, stream->channel_name); | |
997 | ret = -1; | |
998 | goto end; | |
999 | } | |
1000 | ||
c35f9726 JG |
1001 | if (caa_likely(stream->tracefile_size == 0)) { |
1002 | /* No size limit set; nothing to check. */ | |
1003 | goto end; | |
1004 | } | |
1005 | ||
1006 | /* | |
1007 | * Check if writing the new packet would exceed the maximal file size. | |
1008 | */ | |
1009 | if (caa_unlikely((stream->tracefile_size_current + packet_size) > | |
1010 | stream->tracefile_size)) { | |
1011 | const uint64_t new_file_index = | |
1012 | (stream->tracefile_current_index + 1) % | |
1013 | stream->tracefile_count; | |
1014 | ||
1015 | if (new_file_index < stream->tracefile_current_index) { | |
1016 | stream->tracefile_wrapped_around = true; | |
1017 | } | |
1018 | DBG("New stream packet causes stream file rotation: stream_id = %" PRIu64 | |
1019 | ", current_file_size = %" PRIu64 | |
76ee9245 | 1020 | ", packet_size = %zu, current_file_index = %" PRIu64 |
c35f9726 JG |
1021 | " new_file_index = %" PRIu64, |
1022 | stream->stream_handle, | |
1023 | stream->tracefile_size_current, packet_size, | |
1024 | stream->tracefile_current_index, new_file_index); | |
78118e3b | 1025 | tracefile_array_file_rotate(stream->tfa, TRACEFILE_ROTATE_WRITE); |
c35f9726 JG |
1026 | stream->tracefile_current_index = new_file_index; |
1027 | ||
8bb66c3c JG |
1028 | if (stream->file) { |
1029 | fs_handle_close(stream->file); | |
1030 | stream->file = NULL; | |
c35f9726 JG |
1031 | } |
1032 | ret = stream_create_data_output_file_from_trace_chunk(stream, | |
8bb66c3c | 1033 | stream->trace_chunk, false, &stream->file); |
c35f9726 JG |
1034 | if (ret) { |
1035 | ERR("Failed to perform trace file rotation of stream %" PRIu64, | |
1036 | stream->stream_handle); | |
1037 | goto end; | |
1038 | } | |
1039 | ||
1040 | /* | |
1041 | * Reset current size because we just performed a stream | |
1042 | * rotation. | |
1043 | */ | |
68c40154 MD |
1044 | DBG("%s: reset tracefile_size_current for stream %" PRIu64 " was %" PRIu64, |
1045 | __func__, stream->stream_handle, stream->tracefile_size_current); | |
c35f9726 JG |
1046 | stream->tracefile_size_current = 0; |
1047 | *file_rotated = true; | |
1048 | } else { | |
1049 | *file_rotated = false; | |
1050 | } | |
1051 | end: | |
1052 | return ret; | |
1053 | } | |
1054 | ||
1055 | /* Note that the packet is not necessarily complete. */ | |
1056 | int stream_write(struct relay_stream *stream, | |
1057 | const struct lttng_buffer_view *packet, size_t padding_len) | |
1058 | { | |
1059 | int ret = 0; | |
1060 | ssize_t write_ret; | |
1061 | size_t padding_to_write = padding_len; | |
1062 | char padding_buffer[FILE_IO_STACK_BUFFER_SIZE]; | |
1063 | ||
1064 | ASSERT_LOCKED(stream->lock); | |
1065 | memset(padding_buffer, 0, | |
1066 | min(sizeof(padding_buffer), padding_to_write)); | |
1067 | ||
8bb66c3c | 1068 | if (!stream->file || !stream->trace_chunk) { |
1ad1103b JG |
1069 | ERR("Protocol error: received a packet for a stream that doesn't have a current trace chunk: stream_id = %" PRIu64 ", channel_name = %s", |
1070 | stream->stream_handle, stream->channel_name); | |
1071 | ret = -1; | |
1072 | goto end; | |
1073 | } | |
c35f9726 | 1074 | if (packet) { |
8bb66c3c JG |
1075 | write_ret = fs_handle_write( |
1076 | stream->file, packet->data, packet->size); | |
c35f9726 JG |
1077 | if (write_ret != packet->size) { |
1078 | PERROR("Failed to write to stream file of %sstream %" PRIu64, | |
1079 | stream->is_metadata ? "metadata " : "", | |
1080 | stream->stream_handle); | |
1081 | ret = -1; | |
1082 | goto end; | |
1083 | } | |
1084 | } | |
1085 | ||
1086 | while (padding_to_write > 0) { | |
1087 | const size_t padding_to_write_this_pass = | |
1088 | min(padding_to_write, sizeof(padding_buffer)); | |
1089 | ||
8bb66c3c JG |
1090 | write_ret = fs_handle_write(stream->file, padding_buffer, |
1091 | padding_to_write_this_pass); | |
c35f9726 JG |
1092 | if (write_ret != padding_to_write_this_pass) { |
1093 | PERROR("Failed to write padding to file of %sstream %" PRIu64, | |
1094 | stream->is_metadata ? "metadata " : "", | |
1095 | stream->stream_handle); | |
1096 | ret = -1; | |
1097 | goto end; | |
1098 | } | |
1099 | padding_to_write -= padding_to_write_this_pass; | |
1100 | } | |
1101 | ||
1102 | if (stream->is_metadata) { | |
94f73d08 MD |
1103 | size_t recv_len; |
1104 | ||
1105 | recv_len = packet ? packet->size : 0; | |
1106 | recv_len += padding_len; | |
1107 | stream->metadata_received += recv_len; | |
1108 | if (recv_len) { | |
1109 | stream->no_new_metadata_notified = false; | |
1110 | } | |
c35f9726 JG |
1111 | } |
1112 | ||
8c865d87 | 1113 | DBG("Wrote to %sstream %" PRIu64 ": data_length = %zu, padding_length = %zu", |
c35f9726 JG |
1114 | stream->is_metadata ? "metadata " : "", |
1115 | stream->stream_handle, | |
8c865d87 | 1116 | packet ? packet->size : (size_t) 0, padding_len); |
c35f9726 JG |
1117 | end: |
1118 | return ret; | |
1119 | } | |
1120 | ||
1121 | /* | |
1122 | * Update index after receiving a packet for a data stream. | |
1123 | * | |
1124 | * Called with the stream lock held. | |
1125 | * | |
1126 | * Return 0 on success else a negative value. | |
1127 | */ | |
1128 | int stream_update_index(struct relay_stream *stream, uint64_t net_seq_num, | |
1129 | bool rotate_index, bool *flushed, uint64_t total_size) | |
1130 | { | |
1131 | int ret = 0; | |
1132 | uint64_t data_offset; | |
1133 | struct relay_index *index; | |
1134 | ||
92761772 | 1135 | assert(stream->trace_chunk); |
c35f9726 JG |
1136 | ASSERT_LOCKED(stream->lock); |
1137 | /* Get data offset because we are about to update the index. */ | |
1138 | data_offset = htobe64(stream->tracefile_size_current); | |
1139 | ||
1140 | DBG("handle_index_data: stream %" PRIu64 " net_seq_num %" PRIu64 " data offset %" PRIu64, | |
1141 | stream->stream_handle, net_seq_num, stream->tracefile_size_current); | |
1142 | ||
1143 | /* | |
1144 | * Lookup for an existing index for that stream id/sequence | |
1145 | * number. If it exists, the control thread has already received the | |
1146 | * data for it, thus we need to write it to disk. | |
1147 | */ | |
1148 | index = relay_index_get_by_id_or_create(stream, net_seq_num); | |
1149 | if (!index) { | |
1150 | ret = -1; | |
1151 | goto end; | |
1152 | } | |
1153 | ||
1154 | if (rotate_index || !stream->index_file) { | |
1155 | ret = create_index_file(stream, stream->trace_chunk); | |
1156 | if (ret) { | |
1157 | ERR("Failed to create index file for stream %" PRIu64, | |
1158 | stream->stream_handle); | |
1159 | /* Put self-ref for this index due to error. */ | |
1160 | relay_index_put(index); | |
1161 | index = NULL; | |
1162 | goto end; | |
1163 | } | |
1164 | } | |
1165 | ||
1166 | if (relay_index_set_file(index, stream->index_file, data_offset)) { | |
1167 | ret = -1; | |
1168 | /* Put self-ref for this index due to error. */ | |
1169 | relay_index_put(index); | |
1170 | index = NULL; | |
1171 | goto end; | |
1172 | } | |
1173 | ||
1174 | ret = relay_index_try_flush(index); | |
1175 | if (ret == 0) { | |
78118e3b | 1176 | tracefile_array_file_rotate(stream->tfa, TRACEFILE_ROTATE_READ); |
62f6e9ef | 1177 | tracefile_array_commit_seq(stream->tfa, stream->index_received_seqcount); |
c35f9726 | 1178 | stream->index_received_seqcount++; |
0f83d1cc MD |
1179 | LTTNG_OPTIONAL_SET(&stream->received_packet_seq_num, |
1180 | be64toh(index->index_data.packet_seq_num)); | |
c35f9726 JG |
1181 | *flushed = true; |
1182 | } else if (ret > 0) { | |
1183 | index->total_size = total_size; | |
1184 | /* No flush. */ | |
1185 | ret = 0; | |
1186 | } else { | |
1187 | /* | |
1188 | * ret < 0 | |
1189 | * | |
1190 | * relay_index_try_flush is responsible for the self-reference | |
1191 | * put of the index object on error. | |
1192 | */ | |
1193 | ERR("relay_index_try_flush error %d", ret); | |
1194 | ret = -1; | |
1195 | } | |
1196 | end: | |
1197 | return ret; | |
1198 | } | |
1199 | ||
1200 | int stream_complete_packet(struct relay_stream *stream, size_t packet_total_size, | |
1201 | uint64_t sequence_number, bool index_flushed) | |
1202 | { | |
1203 | int ret = 0; | |
1204 | ||
1205 | ASSERT_LOCKED(stream->lock); | |
1206 | ||
1207 | stream->tracefile_size_current += packet_total_size; | |
1208 | if (index_flushed) { | |
1209 | stream->pos_after_last_complete_data_index = | |
1210 | stream->tracefile_size_current; | |
1211 | stream->prev_index_seq = sequence_number; | |
1212 | ret = try_rotate_stream_index(stream); | |
1213 | if (ret < 0) { | |
1214 | goto end; | |
1215 | } | |
1216 | } | |
1217 | ||
1218 | stream->prev_data_seq = sequence_number; | |
1219 | ret = try_rotate_stream_data(stream); | |
d2ec9b88 | 1220 | |
c35f9726 JG |
1221 | end: |
1222 | return ret; | |
1223 | } | |
1224 | ||
1225 | int stream_add_index(struct relay_stream *stream, | |
1226 | const struct lttcomm_relayd_index *index_info) | |
1227 | { | |
1228 | int ret = 0; | |
1229 | struct relay_index *index; | |
1230 | ||
1231 | ASSERT_LOCKED(stream->lock); | |
1232 | ||
68c40154 MD |
1233 | DBG("stream_add_index for stream %" PRIu64, stream->stream_handle); |
1234 | ||
c35f9726 JG |
1235 | /* Live beacon handling */ |
1236 | if (index_info->packet_size == 0) { | |
1237 | DBG("Received live beacon for stream %" PRIu64, | |
1238 | stream->stream_handle); | |
1239 | ||
1240 | /* | |
1241 | * Only flag a stream inactive when it has already | |
1242 | * received data and no indexes are in flight. | |
1243 | */ | |
1244 | if (stream->index_received_seqcount > 0 | |
1245 | && stream->indexes_in_flight == 0) { | |
1246 | stream->beacon_ts_end = index_info->timestamp_end; | |
1247 | } | |
1248 | ret = 0; | |
1249 | goto end; | |
1250 | } else { | |
1251 | stream->beacon_ts_end = -1ULL; | |
1252 | } | |
1253 | ||
1254 | if (stream->ctf_stream_id == -1ULL) { | |
1255 | stream->ctf_stream_id = index_info->stream_id; | |
1256 | } | |
1257 | ||
1258 | index = relay_index_get_by_id_or_create(stream, index_info->net_seq_num); | |
1259 | if (!index) { | |
1260 | ret = -1; | |
1261 | ERR("Failed to get or create index %" PRIu64, | |
1262 | index_info->net_seq_num); | |
1263 | goto end; | |
1264 | } | |
1265 | if (relay_index_set_control_data(index, index_info, | |
1266 | stream->trace->session->minor)) { | |
1267 | ERR("set_index_control_data error"); | |
1268 | relay_index_put(index); | |
1269 | ret = -1; | |
1270 | goto end; | |
1271 | } | |
1272 | ret = relay_index_try_flush(index); | |
1273 | if (ret == 0) { | |
78118e3b | 1274 | tracefile_array_file_rotate(stream->tfa, TRACEFILE_ROTATE_READ); |
62f6e9ef | 1275 | tracefile_array_commit_seq(stream->tfa, stream->index_received_seqcount); |
c35f9726 JG |
1276 | stream->index_received_seqcount++; |
1277 | stream->pos_after_last_complete_data_index += index->total_size; | |
1278 | stream->prev_index_seq = index_info->net_seq_num; | |
0f83d1cc MD |
1279 | LTTNG_OPTIONAL_SET(&stream->received_packet_seq_num, |
1280 | index_info->packet_seq_num); | |
c35f9726 JG |
1281 | |
1282 | ret = try_rotate_stream_index(stream); | |
1283 | if (ret < 0) { | |
1284 | goto end; | |
1285 | } | |
0f83d1cc MD |
1286 | ret = try_rotate_stream_data(stream); |
1287 | if (ret < 0) { | |
1288 | goto end; | |
1289 | } | |
c35f9726 JG |
1290 | } else if (ret > 0) { |
1291 | /* no flush. */ | |
1292 | ret = 0; | |
1293 | } else { | |
1294 | /* | |
1295 | * ret < 0 | |
1296 | * | |
1297 | * relay_index_try_flush is responsible for the self-reference | |
1298 | * put of the index object on error. | |
1299 | */ | |
1300 | ERR("relay_index_try_flush error %d", ret); | |
1301 | ret = -1; | |
1302 | } | |
1303 | end: | |
1304 | return ret; | |
1305 | } | |
1306 | ||
da412cde MD |
1307 | static void print_stream_indexes(struct relay_stream *stream) |
1308 | { | |
1309 | struct lttng_ht_iter iter; | |
1310 | struct relay_index *index; | |
1311 | ||
1312 | rcu_read_lock(); | |
1313 | cds_lfht_for_each_entry(stream->indexes_ht->ht, &iter.iter, index, | |
1314 | index_n.node) { | |
1315 | DBG("index %p net_seq_num %" PRIu64 " refcount %ld" | |
1316 | " stream %" PRIu64 " trace %" PRIu64 | |
1317 | " session %" PRIu64, | |
1318 | index, | |
1319 | index->index_n.key, | |
1320 | stream->ref.refcount, | |
1321 | index->stream->stream_handle, | |
1322 | index->stream->trace->id, | |
1323 | index->stream->trace->session->id); | |
1324 | } | |
1325 | rcu_read_unlock(); | |
1326 | } | |
1327 | ||
c35f9726 JG |
1328 | int stream_reset_file(struct relay_stream *stream) |
1329 | { | |
1330 | ASSERT_LOCKED(stream->lock); | |
1331 | ||
8bb66c3c JG |
1332 | if (stream->file) { |
1333 | int ret; | |
1334 | ||
1335 | ret = fs_handle_close(stream->file); | |
1336 | if (ret) { | |
1337 | ERR("Failed to close stream file handle: channel name = \"%s\", id = %" PRIu64, | |
1338 | stream->channel_name, | |
1339 | stream->stream_handle); | |
1340 | } | |
1341 | stream->file = NULL; | |
c35f9726 JG |
1342 | } |
1343 | ||
68c40154 MD |
1344 | DBG("%s: reset tracefile_size_current for stream %" PRIu64 " was %" PRIu64, |
1345 | __func__, stream->stream_handle, stream->tracefile_size_current); | |
c35f9726 JG |
1346 | stream->tracefile_size_current = 0; |
1347 | stream->prev_data_seq = 0; | |
1348 | stream->prev_index_seq = 0; | |
1349 | /* Note that this does not reset the tracefile array. */ | |
1350 | stream->tracefile_current_index = 0; | |
1351 | stream->pos_after_last_complete_data_index = 0; | |
1352 | ||
1353 | return stream_create_data_output_file_from_trace_chunk(stream, | |
8bb66c3c | 1354 | stream->trace_chunk, true, &stream->file); |
c35f9726 JG |
1355 | } |
1356 | ||
7591bab1 MD |
1357 | void print_relay_streams(void) |
1358 | { | |
1359 | struct lttng_ht_iter iter; | |
1360 | struct relay_stream *stream; | |
1361 | ||
ce3f3ba3 JG |
1362 | if (!relay_streams_ht) { |
1363 | return; | |
1364 | } | |
1365 | ||
7591bab1 MD |
1366 | rcu_read_lock(); |
1367 | cds_lfht_for_each_entry(relay_streams_ht->ht, &iter.iter, stream, | |
1368 | node.node) { | |
1369 | if (!stream_get(stream)) { | |
1370 | continue; | |
1371 | } | |
1372 | DBG("stream %p refcount %ld stream %" PRIu64 " trace %" PRIu64 | |
1373 | " session %" PRIu64, | |
1374 | stream, | |
1375 | stream->ref.refcount, | |
1376 | stream->stream_handle, | |
1377 | stream->trace->id, | |
1378 | stream->trace->session->id); | |
da412cde | 1379 | print_stream_indexes(stream); |
7591bab1 MD |
1380 | stream_put(stream); |
1381 | } | |
1382 | rcu_read_unlock(); | |
2a174661 | 1383 | } |