Commit | Line | Data |
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fb198a11 JG |
1 | /* |
2 | * Copyright (C) 2014 - Jérémie Galarneau <jeremie.galarneau@efficios.com> | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms of the GNU General Public License, version 2 only, as | |
6 | * published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
11 | * more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License along with | |
14 | * this program; if not, write to the Free Software Foundation, Inc., 51 | |
15 | * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
16 | */ | |
17 | ||
6c1c0768 | 18 | #define _LGPL_SOURCE |
fb198a11 JG |
19 | #include <assert.h> |
20 | #include <inttypes.h> | |
21 | #include <string.h> | |
22 | #include <urcu/uatomic.h> | |
23 | #include <unistd.h> | |
24 | ||
25 | #include <common/defaults.h> | |
26 | #include <common/error.h> | |
f40ef1d5 | 27 | #include <common/config/session-config.h> |
fb198a11 JG |
28 | #include <common/utils.h> |
29 | #include <common/runas.h> | |
30 | #include <lttng/save-internal.h> | |
31 | ||
847a5916 | 32 | #include "kernel.h" |
fb198a11 JG |
33 | #include "save.h" |
34 | #include "session.h" | |
0dbc2034 | 35 | #include "lttng-syscall.h" |
fb198a11 | 36 | #include "trace-ust.h" |
51755dc8 | 37 | #include "agent.h" |
fb198a11 JG |
38 | |
39 | static | |
40 | int save_kernel_channel_attributes(struct config_writer *writer, | |
41 | struct lttng_channel_attr *attr) | |
42 | { | |
43 | int ret; | |
44 | ||
45 | ret = config_writer_write_element_string(writer, | |
46 | config_element_overwrite_mode, | |
47 | attr->overwrite ? config_overwrite_mode_overwrite : | |
48 | config_overwrite_mode_discard); | |
49 | if (ret) { | |
50 | goto end; | |
51 | } | |
52 | ||
53 | ret = config_writer_write_element_unsigned_int(writer, | |
54 | config_element_subbuf_size, attr->subbuf_size); | |
55 | if (ret) { | |
56 | goto end; | |
57 | } | |
58 | ||
59 | ret = config_writer_write_element_unsigned_int(writer, | |
60 | config_element_num_subbuf, | |
61 | attr->num_subbuf); | |
62 | if (ret) { | |
63 | goto end; | |
64 | } | |
65 | ||
66 | ret = config_writer_write_element_unsigned_int(writer, | |
67 | config_element_switch_timer_interval, | |
68 | attr->switch_timer_interval); | |
69 | if (ret) { | |
70 | goto end; | |
71 | } | |
72 | ||
73 | ret = config_writer_write_element_unsigned_int(writer, | |
74 | config_element_read_timer_interval, | |
75 | attr->read_timer_interval); | |
76 | if (ret) { | |
77 | goto end; | |
78 | } | |
79 | ||
80 | ret = config_writer_write_element_string(writer, | |
81 | config_element_output_type, | |
82 | attr->output == LTTNG_EVENT_SPLICE ? | |
83 | config_output_type_splice : config_output_type_mmap); | |
84 | if (ret) { | |
85 | goto end; | |
86 | } | |
87 | ||
88 | ret = config_writer_write_element_unsigned_int(writer, | |
89 | config_element_tracefile_size, attr->tracefile_size); | |
90 | if (ret) { | |
91 | goto end; | |
92 | } | |
93 | ||
94 | ret = config_writer_write_element_unsigned_int(writer, | |
95 | config_element_tracefile_count, | |
96 | attr->tracefile_count); | |
97 | if (ret) { | |
98 | goto end; | |
99 | } | |
100 | ||
101 | ret = config_writer_write_element_unsigned_int(writer, | |
102 | config_element_live_timer_interval, | |
103 | attr->live_timer_interval); | |
104 | if (ret) { | |
105 | goto end; | |
106 | } | |
4fc2b126 JR |
107 | |
108 | if (attr->extended.ptr) { | |
109 | struct lttng_channel_extended *ext = NULL; | |
110 | ||
111 | ext = (struct lttng_channel_extended *) attr->extended.ptr; | |
112 | ret = config_writer_write_element_unsigned_int(writer, | |
113 | config_element_monitor_timer_interval, | |
114 | ext->monitor_timer_interval); | |
115 | if (ret) { | |
116 | goto end; | |
117 | } | |
275472aa JR |
118 | |
119 | ret = config_writer_write_element_signed_int(writer, | |
120 | config_element_blocking_timeout, | |
121 | ext->blocking_timeout); | |
122 | if (ret) { | |
123 | goto end; | |
124 | } | |
4fc2b126 JR |
125 | } |
126 | ||
fb198a11 JG |
127 | end: |
128 | return ret ? LTTNG_ERR_SAVE_IO_FAIL : 0; | |
129 | } | |
130 | ||
131 | static | |
132 | int save_ust_channel_attributes(struct config_writer *writer, | |
133 | struct lttng_ust_channel_attr *attr) | |
134 | { | |
135 | int ret; | |
4fc2b126 | 136 | struct ltt_ust_channel *channel = NULL; |
fb198a11 JG |
137 | |
138 | ret = config_writer_write_element_string(writer, | |
139 | config_element_overwrite_mode, | |
140 | attr->overwrite ? config_overwrite_mode_overwrite : | |
141 | config_overwrite_mode_discard); | |
142 | if (ret) { | |
143 | goto end; | |
144 | } | |
145 | ||
146 | ret = config_writer_write_element_unsigned_int(writer, | |
147 | config_element_subbuf_size, attr->subbuf_size); | |
148 | if (ret) { | |
149 | goto end; | |
150 | } | |
151 | ||
152 | ret = config_writer_write_element_unsigned_int(writer, | |
153 | config_element_num_subbuf, | |
154 | attr->num_subbuf); | |
155 | if (ret) { | |
156 | goto end; | |
157 | } | |
158 | ||
159 | ret = config_writer_write_element_unsigned_int(writer, | |
160 | config_element_switch_timer_interval, | |
161 | attr->switch_timer_interval); | |
162 | if (ret) { | |
163 | goto end; | |
164 | } | |
165 | ||
166 | ret = config_writer_write_element_unsigned_int(writer, | |
167 | config_element_read_timer_interval, | |
168 | attr->read_timer_interval); | |
169 | if (ret) { | |
170 | goto end; | |
171 | } | |
172 | ||
173 | ret = config_writer_write_element_string(writer, | |
174 | config_element_output_type, | |
175 | attr->output == LTTNG_UST_MMAP ? | |
176 | config_output_type_mmap : config_output_type_splice); | |
177 | if (ret) { | |
178 | goto end; | |
179 | } | |
4fc2b126 | 180 | |
275472aa JR |
181 | ret = config_writer_write_element_signed_int(writer, |
182 | config_element_blocking_timeout, | |
183 | attr->u.s.blocking_timeout); | |
184 | if (ret) { | |
185 | goto end; | |
186 | } | |
187 | ||
4fc2b126 JR |
188 | /* |
189 | * Fetch the monitor timer which is located in the parent of | |
190 | * lttng_ust_channel_attr | |
191 | */ | |
192 | channel = caa_container_of(attr, struct ltt_ust_channel, attr); | |
193 | ret = config_writer_write_element_unsigned_int(writer, | |
194 | config_element_monitor_timer_interval, | |
195 | channel->monitor_timer_interval); | |
196 | if (ret) { | |
197 | goto end; | |
198 | } | |
199 | ||
fb198a11 JG |
200 | end: |
201 | return ret ? LTTNG_ERR_SAVE_IO_FAIL : 0; | |
202 | } | |
203 | ||
204 | static | |
205 | const char *get_kernel_instrumentation_string( | |
206 | enum lttng_kernel_instrumentation instrumentation) | |
207 | { | |
208 | const char *instrumentation_string; | |
209 | ||
210 | switch (instrumentation) { | |
211 | case LTTNG_KERNEL_ALL: | |
212 | instrumentation_string = config_event_type_all; | |
213 | break; | |
214 | case LTTNG_KERNEL_TRACEPOINT: | |
215 | instrumentation_string = config_event_type_tracepoint; | |
216 | break; | |
217 | case LTTNG_KERNEL_KPROBE: | |
218 | instrumentation_string = config_event_type_kprobe; | |
219 | break; | |
220 | case LTTNG_KERNEL_FUNCTION: | |
221 | instrumentation_string = config_event_type_function; | |
222 | break; | |
223 | case LTTNG_KERNEL_KRETPROBE: | |
224 | instrumentation_string = config_event_type_kretprobe; | |
225 | break; | |
226 | case LTTNG_KERNEL_NOOP: | |
227 | instrumentation_string = config_event_type_noop; | |
228 | break; | |
229 | case LTTNG_KERNEL_SYSCALL: | |
230 | instrumentation_string = config_event_type_syscall; | |
231 | break; | |
232 | default: | |
233 | instrumentation_string = NULL; | |
234 | } | |
235 | ||
236 | return instrumentation_string; | |
237 | } | |
238 | ||
239 | static | |
240 | const char *get_kernel_context_type_string( | |
241 | enum lttng_kernel_context_type context_type) | |
242 | { | |
243 | const char *context_type_string; | |
244 | ||
245 | switch (context_type) { | |
246 | case LTTNG_KERNEL_CONTEXT_PID: | |
247 | context_type_string = config_event_context_pid; | |
248 | break; | |
249 | case LTTNG_KERNEL_CONTEXT_PROCNAME: | |
250 | context_type_string = config_event_context_procname; | |
251 | break; | |
252 | case LTTNG_KERNEL_CONTEXT_PRIO: | |
253 | context_type_string = config_event_context_prio; | |
254 | break; | |
255 | case LTTNG_KERNEL_CONTEXT_NICE: | |
256 | context_type_string = config_event_context_nice; | |
257 | break; | |
258 | case LTTNG_KERNEL_CONTEXT_VPID: | |
259 | context_type_string = config_event_context_vpid; | |
260 | break; | |
261 | case LTTNG_KERNEL_CONTEXT_TID: | |
262 | context_type_string = config_event_context_tid; | |
263 | break; | |
264 | case LTTNG_KERNEL_CONTEXT_VTID: | |
265 | context_type_string = config_event_context_vtid; | |
266 | break; | |
267 | case LTTNG_KERNEL_CONTEXT_PPID: | |
268 | context_type_string = config_event_context_ppid; | |
269 | break; | |
270 | case LTTNG_KERNEL_CONTEXT_VPPID: | |
271 | context_type_string = config_event_context_vppid; | |
272 | break; | |
273 | case LTTNG_KERNEL_CONTEXT_HOSTNAME: | |
274 | context_type_string = config_event_context_hostname; | |
275 | break; | |
1ae5e83e JD |
276 | case LTTNG_KERNEL_CONTEXT_INTERRUPTIBLE: |
277 | context_type_string = config_event_context_interruptible; | |
278 | break; | |
279 | case LTTNG_KERNEL_CONTEXT_PREEMPTIBLE: | |
280 | context_type_string = config_event_context_preemptible; | |
281 | break; | |
282 | case LTTNG_KERNEL_CONTEXT_NEED_RESCHEDULE: | |
283 | context_type_string = config_event_context_need_reschedule; | |
284 | break; | |
285 | case LTTNG_KERNEL_CONTEXT_MIGRATABLE: | |
286 | context_type_string = config_event_context_migratable; | |
287 | break; | |
fb198a11 JG |
288 | default: |
289 | context_type_string = NULL; | |
290 | } | |
291 | ||
292 | return context_type_string; | |
293 | } | |
294 | ||
295 | static | |
296 | const char *get_ust_context_type_string( | |
297 | enum lttng_ust_context_type context_type) | |
298 | { | |
299 | const char *context_type_string; | |
300 | ||
301 | switch (context_type) { | |
302 | case LTTNG_UST_CONTEXT_PROCNAME: | |
303 | context_type_string = config_event_context_procname; | |
304 | break; | |
305 | case LTTNG_UST_CONTEXT_VPID: | |
306 | context_type_string = config_event_context_vpid; | |
307 | break; | |
308 | case LTTNG_UST_CONTEXT_VTID: | |
309 | context_type_string = config_event_context_vtid; | |
310 | break; | |
311 | case LTTNG_UST_CONTEXT_IP: | |
312 | context_type_string = config_event_context_ip; | |
313 | break; | |
314 | case LTTNG_UST_CONTEXT_PTHREAD_ID: | |
315 | context_type_string = config_event_context_pthread_id; | |
316 | break; | |
045fc617 JG |
317 | case LTTNG_UST_CONTEXT_APP_CONTEXT: |
318 | context_type_string = config_event_context_app; | |
319 | break; | |
e885a367 | 320 | case LTTNG_UST_CONTEXT_PERF_THREAD_COUNTER: |
14ce5bd8 JG |
321 | /* |
322 | * Error, should not be stored in the XML, perf contexts | |
323 | * are stored as a node of type event_perf_context_type. | |
324 | */ | |
fb198a11 JG |
325 | default: |
326 | context_type_string = NULL; | |
e885a367 | 327 | break; |
fb198a11 JG |
328 | } |
329 | ||
330 | return context_type_string; | |
331 | } | |
332 | ||
333 | static | |
334 | const char *get_buffer_type_string( | |
335 | enum lttng_buffer_type buffer_type) | |
336 | { | |
337 | const char *buffer_type_string; | |
338 | ||
339 | switch (buffer_type) { | |
340 | case LTTNG_BUFFER_PER_PID: | |
341 | buffer_type_string = config_buffer_type_per_pid; | |
342 | break; | |
343 | case LTTNG_BUFFER_PER_UID: | |
344 | buffer_type_string = config_buffer_type_per_uid; | |
345 | break; | |
346 | case LTTNG_BUFFER_GLOBAL: | |
347 | buffer_type_string = config_buffer_type_global; | |
348 | break; | |
349 | default: | |
350 | buffer_type_string = NULL; | |
351 | } | |
352 | ||
353 | return buffer_type_string; | |
354 | } | |
355 | ||
356 | static | |
357 | const char *get_loglevel_type_string( | |
358 | enum lttng_ust_loglevel_type loglevel_type) | |
359 | { | |
360 | const char *loglevel_type_string; | |
361 | ||
362 | switch (loglevel_type) { | |
363 | case LTTNG_UST_LOGLEVEL_ALL: | |
364 | loglevel_type_string = config_loglevel_type_all; | |
365 | break; | |
366 | case LTTNG_UST_LOGLEVEL_RANGE: | |
367 | loglevel_type_string = config_loglevel_type_range; | |
368 | break; | |
369 | case LTTNG_UST_LOGLEVEL_SINGLE: | |
370 | loglevel_type_string = config_loglevel_type_single; | |
371 | break; | |
372 | default: | |
373 | loglevel_type_string = NULL; | |
374 | } | |
375 | ||
376 | return loglevel_type_string; | |
377 | } | |
378 | ||
379 | static | |
380 | int save_kernel_event(struct config_writer *writer, | |
381 | struct ltt_kernel_event *event) | |
382 | { | |
383 | int ret; | |
384 | const char *instrumentation_type; | |
385 | ||
386 | ret = config_writer_open_element(writer, config_element_event); | |
387 | if (ret) { | |
388 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
389 | goto end; | |
390 | } | |
391 | ||
392 | if (event->event->name[0]) { | |
393 | ret = config_writer_write_element_string(writer, | |
394 | config_element_name, event->event->name); | |
395 | if (ret) { | |
396 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
397 | goto end; | |
398 | } | |
399 | } | |
400 | ||
401 | ret = config_writer_write_element_bool(writer, config_element_enabled, | |
402 | event->enabled); | |
403 | if (ret) { | |
404 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
405 | goto end; | |
406 | } | |
407 | ||
408 | instrumentation_type = get_kernel_instrumentation_string( | |
409 | event->event->instrumentation); | |
410 | if (!instrumentation_type) { | |
411 | ret = LTTNG_ERR_INVALID; | |
412 | goto end; | |
413 | } | |
414 | ||
415 | ret = config_writer_write_element_string(writer, config_element_type, | |
416 | instrumentation_type); | |
417 | if (ret) { | |
418 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
419 | goto end; | |
420 | } | |
421 | ||
911d1560 JG |
422 | if (event->filter_expression) { |
423 | ret = config_writer_write_element_string(writer, | |
424 | config_element_filter, | |
425 | event->filter_expression); | |
426 | if (ret) { | |
427 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
428 | goto end; | |
429 | } | |
430 | } | |
431 | ||
fb198a11 JG |
432 | if (event->event->instrumentation == LTTNG_KERNEL_FUNCTION || |
433 | event->event->instrumentation == LTTNG_KERNEL_KPROBE || | |
434 | event->event->instrumentation == LTTNG_KERNEL_KRETPROBE) { | |
435 | ||
436 | ret = config_writer_open_element(writer, | |
437 | config_element_attributes); | |
438 | if (ret) { | |
439 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
440 | goto end; | |
441 | } | |
442 | ||
443 | switch (event->event->instrumentation) { | |
0de3eda1 | 444 | case LTTNG_KERNEL_SYSCALL: |
fb198a11 JG |
445 | case LTTNG_KERNEL_FUNCTION: |
446 | ret = config_writer_open_element(writer, | |
447 | config_element_function_attributes); | |
448 | if (ret) { | |
449 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
450 | goto end; | |
451 | } | |
452 | ||
453 | ret = config_writer_write_element_string(writer, | |
454 | config_element_name, | |
455 | event->event->u.ftrace.symbol_name); | |
456 | if (ret) { | |
457 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
458 | goto end; | |
459 | } | |
460 | ||
461 | /* /function attributes */ | |
462 | ret = config_writer_close_element(writer); | |
463 | if (ret) { | |
464 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
465 | goto end; | |
466 | } | |
467 | break; | |
468 | case LTTNG_KERNEL_KPROBE: | |
469 | case LTTNG_KERNEL_KRETPROBE: | |
470 | { | |
471 | const char *symbol_name; | |
472 | uint64_t addr; | |
473 | uint64_t offset; | |
474 | ||
475 | if (event->event->instrumentation == | |
476 | LTTNG_KERNEL_KPROBE) { | |
477 | /* | |
478 | * Comments in lttng-kernel.h mention that | |
479 | * either addr or symbol_name are set, not both. | |
480 | */ | |
481 | addr = event->event->u.kprobe.addr; | |
482 | offset = event->event->u.kprobe.offset; | |
483 | symbol_name = addr ? NULL : | |
484 | event->event->u.kprobe.symbol_name; | |
485 | } else { | |
486 | symbol_name = | |
487 | event->event->u.kretprobe.symbol_name; | |
488 | addr = event->event->u.kretprobe.addr; | |
489 | offset = event->event->u.kretprobe.offset; | |
490 | } | |
491 | ||
492 | ret = config_writer_open_element(writer, | |
493 | config_element_probe_attributes); | |
494 | if (ret) { | |
495 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
496 | goto end; | |
497 | } | |
498 | ||
499 | if (symbol_name) { | |
500 | ret = config_writer_write_element_string(writer, | |
501 | config_element_symbol_name, | |
502 | symbol_name); | |
503 | if (ret) { | |
504 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
505 | goto end; | |
506 | } | |
507 | } | |
508 | ||
509 | if (addr) { | |
510 | ret = config_writer_write_element_unsigned_int( | |
511 | writer, config_element_address, addr); | |
512 | if (ret) { | |
513 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
514 | goto end; | |
515 | } | |
516 | } | |
517 | ||
518 | if (offset) { | |
519 | ret = config_writer_write_element_unsigned_int( | |
520 | writer, config_element_offset, offset); | |
521 | if (ret) { | |
522 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
523 | goto end; | |
524 | } | |
525 | } | |
526 | ||
527 | ret = config_writer_close_element(writer); | |
528 | if (ret) { | |
529 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
530 | goto end; | |
531 | } | |
532 | break; | |
533 | } | |
534 | default: | |
535 | ERR("Unsupported kernel instrumentation type."); | |
536 | ret = LTTNG_ERR_INVALID; | |
537 | goto end; | |
538 | } | |
539 | ||
540 | /* /attributes */ | |
541 | ret = config_writer_close_element(writer); | |
542 | if (ret) { | |
543 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
544 | goto end; | |
545 | } | |
546 | } | |
547 | ||
548 | /* /event */ | |
549 | ret = config_writer_close_element(writer); | |
550 | if (ret) { | |
551 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
552 | goto end; | |
553 | } | |
554 | end: | |
555 | return ret; | |
556 | } | |
557 | ||
558 | static | |
559 | int save_kernel_events(struct config_writer *writer, | |
0de3eda1 | 560 | struct ltt_kernel_channel *kchan) |
fb198a11 JG |
561 | { |
562 | int ret; | |
563 | struct ltt_kernel_event *event; | |
564 | ||
565 | ret = config_writer_open_element(writer, config_element_events); | |
566 | if (ret) { | |
567 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
568 | goto end; | |
569 | } | |
570 | ||
0de3eda1 | 571 | cds_list_for_each_entry(event, &kchan->events_list.head, list) { |
fb198a11 JG |
572 | ret = save_kernel_event(writer, event); |
573 | if (ret) { | |
574 | goto end; | |
575 | } | |
576 | } | |
577 | ||
578 | /* /events */ | |
579 | ret = config_writer_close_element(writer); | |
580 | if (ret) { | |
581 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
582 | goto end; | |
583 | } | |
584 | end: | |
585 | return ret; | |
586 | } | |
587 | ||
588 | static | |
589 | int save_ust_event(struct config_writer *writer, | |
590 | struct ltt_ust_event *event) | |
591 | { | |
592 | int ret; | |
593 | const char *loglevel_type_string; | |
594 | ||
595 | ret = config_writer_open_element(writer, config_element_event); | |
596 | if (ret) { | |
597 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
598 | goto end; | |
599 | } | |
600 | ||
601 | if (event->attr.name[0]) { | |
602 | ret = config_writer_write_element_string(writer, | |
603 | config_element_name, event->attr.name); | |
604 | if (ret) { | |
605 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
606 | goto end; | |
607 | } | |
608 | } | |
609 | ||
610 | ret = config_writer_write_element_bool(writer, config_element_enabled, | |
611 | event->enabled); | |
612 | if (ret) { | |
613 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
614 | goto end; | |
615 | } | |
616 | ||
617 | if (event->attr.instrumentation != LTTNG_UST_TRACEPOINT) { | |
618 | ERR("Unsupported UST instrumentation type."); | |
619 | ret = LTTNG_ERR_INVALID; | |
620 | goto end; | |
621 | } | |
622 | ret = config_writer_write_element_string(writer, config_element_type, | |
623 | config_event_type_tracepoint); | |
624 | if (ret) { | |
625 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
626 | goto end; | |
627 | } | |
628 | ||
629 | loglevel_type_string = get_loglevel_type_string( | |
630 | event->attr.loglevel_type); | |
631 | if (!loglevel_type_string) { | |
632 | ERR("Unsupported UST loglevel type."); | |
633 | ret = LTTNG_ERR_INVALID; | |
634 | goto end; | |
635 | } | |
636 | ||
637 | ret = config_writer_write_element_string(writer, | |
638 | config_element_loglevel_type, loglevel_type_string); | |
639 | if (ret) { | |
640 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
641 | goto end; | |
642 | } | |
643 | ||
1adbdb10 JG |
644 | /* The log level is irrelevant if no "filtering" is enabled */ |
645 | if (event->attr.loglevel_type != LTTNG_UST_LOGLEVEL_ALL) { | |
646 | ret = config_writer_write_element_signed_int(writer, | |
647 | config_element_loglevel, event->attr.loglevel); | |
648 | if (ret) { | |
649 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
650 | goto end; | |
651 | } | |
fb198a11 JG |
652 | } |
653 | ||
654 | if (event->filter_expression) { | |
655 | ret = config_writer_write_element_string(writer, | |
656 | config_element_filter, event->filter_expression); | |
657 | if (ret) { | |
658 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
659 | goto end; | |
660 | } | |
661 | } | |
662 | ||
663 | if (event->exclusion && event->exclusion->count) { | |
664 | uint32_t i; | |
665 | ||
666 | ret = config_writer_open_element(writer, | |
667 | config_element_exclusions); | |
668 | if (ret) { | |
669 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
670 | goto end; | |
671 | } | |
672 | ||
673 | for (i = 0; i < event->exclusion->count; i++) { | |
674 | ret = config_writer_write_element_string(writer, | |
675 | config_element_exclusion, | |
d7af3565 PP |
676 | LTTNG_EVENT_EXCLUSION_NAME_AT( |
677 | event->exclusion, i)); | |
fb198a11 JG |
678 | if (ret) { |
679 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
680 | goto end; | |
681 | } | |
682 | } | |
683 | ||
684 | /* /exclusions */ | |
685 | ret = config_writer_close_element(writer); | |
686 | if (ret) { | |
687 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
688 | goto end; | |
689 | } | |
690 | } | |
691 | ||
692 | /* /event */ | |
693 | ret = config_writer_close_element(writer); | |
694 | if (ret) { | |
695 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
696 | goto end; | |
697 | } | |
698 | end: | |
699 | return ret; | |
700 | } | |
701 | ||
702 | static | |
703 | int save_ust_events(struct config_writer *writer, | |
704 | struct lttng_ht *events) | |
705 | { | |
706 | int ret; | |
707 | struct ltt_ust_event *event; | |
708 | struct lttng_ht_node_str *node; | |
709 | struct lttng_ht_iter iter; | |
710 | ||
711 | ret = config_writer_open_element(writer, config_element_events); | |
712 | if (ret) { | |
713 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
714 | goto end; | |
715 | } | |
716 | ||
717 | rcu_read_lock(); | |
718 | cds_lfht_for_each_entry(events->ht, &iter.iter, node, node) { | |
719 | event = caa_container_of(node, struct ltt_ust_event, node); | |
720 | ||
af325ba1 JG |
721 | if (event->internal) { |
722 | /* Internal events must not be exposed to clients */ | |
723 | continue; | |
724 | } | |
fb198a11 JG |
725 | ret = save_ust_event(writer, event); |
726 | if (ret) { | |
727 | rcu_read_unlock(); | |
728 | goto end; | |
729 | } | |
730 | } | |
731 | rcu_read_unlock(); | |
732 | ||
733 | /* /events */ | |
734 | ret = config_writer_close_element(writer); | |
735 | if (ret) { | |
736 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
737 | goto end; | |
738 | } | |
739 | end: | |
740 | return ret; | |
741 | } | |
742 | ||
51755dc8 | 743 | static |
0b35b846 | 744 | int init_ust_event_from_agent_event(struct ltt_ust_event *ust_event, |
51755dc8 JG |
745 | struct agent_event *agent_event) |
746 | { | |
0b35b846 JG |
747 | int ret = 0; |
748 | enum lttng_ust_loglevel_type ust_loglevel_type; | |
749 | ||
51755dc8 JG |
750 | ust_event->enabled = agent_event->enabled; |
751 | ust_event->attr.instrumentation = LTTNG_UST_TRACEPOINT; | |
d333bdaa MD |
752 | if (lttng_strncpy(ust_event->attr.name, agent_event->name, |
753 | LTTNG_SYMBOL_NAME_LEN)) { | |
754 | ret = -1; | |
755 | goto end; | |
756 | } | |
0b35b846 JG |
757 | switch (agent_event->loglevel_type) { |
758 | case LTTNG_EVENT_LOGLEVEL_ALL: | |
759 | ust_loglevel_type = LTTNG_UST_LOGLEVEL_ALL; | |
760 | break; | |
761 | case LTTNG_EVENT_LOGLEVEL_SINGLE: | |
762 | ust_loglevel_type = LTTNG_UST_LOGLEVEL_SINGLE; | |
763 | break; | |
764 | case LTTNG_EVENT_LOGLEVEL_RANGE: | |
765 | ust_loglevel_type = LTTNG_UST_LOGLEVEL_RANGE; | |
766 | break; | |
767 | default: | |
768 | ERR("Invalid agent_event loglevel_type."); | |
769 | ret = -1; | |
770 | goto end; | |
771 | } | |
772 | ||
773 | ust_event->attr.loglevel_type = ust_loglevel_type; | |
2106efa0 | 774 | ust_event->attr.loglevel = agent_event->loglevel_value; |
51755dc8 JG |
775 | ust_event->filter_expression = agent_event->filter_expression; |
776 | ust_event->exclusion = agent_event->exclusion; | |
0b35b846 JG |
777 | end: |
778 | return ret; | |
51755dc8 JG |
779 | } |
780 | ||
781 | static | |
782 | int save_agent_events(struct config_writer *writer, | |
783 | struct ltt_ust_channel *chan, | |
784 | struct agent *agent) | |
785 | { | |
786 | int ret; | |
787 | struct lttng_ht_iter iter; | |
788 | struct lttng_ht_node_str *node; | |
789 | ||
790 | ret = config_writer_open_element(writer, config_element_events); | |
791 | if (ret) { | |
792 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
793 | goto end; | |
794 | } | |
795 | ||
796 | rcu_read_lock(); | |
797 | cds_lfht_for_each_entry(agent->events->ht, &iter.iter, node, node) { | |
798 | int ret; | |
799 | struct agent_event *agent_event; | |
800 | struct ltt_ust_event fake_event; | |
801 | ||
802 | memset(&fake_event, 0, sizeof(fake_event)); | |
803 | agent_event = caa_container_of(node, struct agent_event, node); | |
804 | ||
805 | /* | |
806 | * Initialize a fake ust event to reuse the same serialization | |
807 | * function since UST and agent events contain the same info | |
808 | * (and one could wonder why they don't reuse the same | |
809 | * structures...). | |
810 | */ | |
0b35b846 JG |
811 | ret = init_ust_event_from_agent_event(&fake_event, agent_event); |
812 | if (ret) { | |
813 | rcu_read_unlock(); | |
814 | goto end; | |
815 | } | |
51755dc8 JG |
816 | ret = save_ust_event(writer, &fake_event); |
817 | if (ret) { | |
818 | rcu_read_unlock(); | |
819 | goto end; | |
820 | } | |
821 | } | |
822 | rcu_read_unlock(); | |
823 | ||
824 | /* /events */ | |
825 | ret = config_writer_close_element(writer); | |
826 | if (ret) { | |
827 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
828 | goto end; | |
829 | } | |
830 | end: | |
831 | return ret; | |
832 | } | |
833 | ||
fb198a11 JG |
834 | static |
835 | int save_kernel_context(struct config_writer *writer, | |
836 | struct lttng_kernel_context *ctx) | |
837 | { | |
838 | int ret = 0; | |
839 | ||
840 | if (!ctx) { | |
841 | goto end; | |
842 | } | |
843 | ||
fb198a11 JG |
844 | ret = config_writer_open_element(writer, config_element_context); |
845 | if (ret) { | |
846 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
847 | goto end; | |
848 | } | |
849 | ||
cba45eda | 850 | if (ctx->ctx == LTTNG_KERNEL_CONTEXT_PERF_CPU_COUNTER) { |
045fc617 JG |
851 | ret = config_writer_open_element(writer, |
852 | config_element_context_perf); | |
fb198a11 JG |
853 | if (ret) { |
854 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
855 | goto end; | |
856 | } | |
857 | ||
858 | ret = config_writer_write_element_unsigned_int(writer, | |
859 | config_element_type, ctx->u.perf_counter.type); | |
860 | if (ret) { | |
861 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
862 | goto end; | |
863 | } | |
864 | ||
865 | ret = config_writer_write_element_unsigned_int(writer, | |
866 | config_element_config, ctx->u.perf_counter.config); | |
867 | if (ret) { | |
868 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
869 | goto end; | |
870 | } | |
871 | ||
872 | ret = config_writer_write_element_string(writer, | |
873 | config_element_name, ctx->u.perf_counter.name); | |
874 | if (ret) { | |
875 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
876 | goto end; | |
877 | } | |
878 | ||
879 | /* /perf */ | |
880 | ret = config_writer_close_element(writer); | |
881 | if (ret) { | |
882 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
883 | goto end; | |
884 | } | |
885 | } else { | |
886 | const char *context_type_string = | |
887 | get_kernel_context_type_string(ctx->ctx); | |
888 | ||
889 | if (!context_type_string) { | |
890 | ERR("Unsupported kernel context type."); | |
891 | ret = LTTNG_ERR_INVALID; | |
892 | goto end; | |
893 | } | |
894 | ||
895 | ret = config_writer_write_element_string(writer, | |
896 | config_element_type, context_type_string); | |
897 | if (ret) { | |
898 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
899 | goto end; | |
900 | } | |
901 | } | |
902 | ||
903 | /* /context */ | |
904 | ret = config_writer_close_element(writer); | |
905 | if (ret) { | |
906 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
907 | goto end; | |
908 | } | |
909 | ||
645328ae DG |
910 | end: |
911 | return ret; | |
912 | } | |
913 | ||
914 | static | |
915 | int save_kernel_contexts(struct config_writer *writer, | |
916 | struct ltt_kernel_channel *kchan) | |
917 | { | |
918 | int ret; | |
919 | struct ltt_kernel_context *ctx; | |
920 | ||
2aa64052 JG |
921 | if (cds_list_empty(&kchan->ctx_list)) { |
922 | ret = 0; | |
923 | goto end; | |
924 | } | |
925 | ||
645328ae DG |
926 | ret = config_writer_open_element(writer, config_element_contexts); |
927 | if (ret) { | |
928 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
929 | goto end; | |
930 | } | |
931 | ||
932 | cds_list_for_each_entry(ctx, &kchan->ctx_list, list) { | |
933 | ret = save_kernel_context(writer, &ctx->ctx); | |
934 | if (ret) { | |
935 | goto end; | |
936 | } | |
937 | } | |
938 | ||
fb198a11 JG |
939 | /* /contexts */ |
940 | ret = config_writer_close_element(writer); | |
941 | if (ret) { | |
942 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
943 | goto end; | |
944 | } | |
945 | end: | |
946 | return ret; | |
947 | } | |
948 | ||
045fc617 JG |
949 | static |
950 | int save_ust_context_perf_thread_counter(struct config_writer *writer, | |
951 | struct ltt_ust_context *ctx) | |
952 | { | |
953 | int ret; | |
954 | ||
955 | assert(writer); | |
956 | assert(ctx); | |
957 | ||
958 | /* Perf contexts are saved as event_perf_context_type */ | |
959 | ret = config_writer_open_element(writer, config_element_context_perf); | |
960 | if (ret) { | |
961 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
962 | goto end; | |
963 | } | |
964 | ||
965 | ret = config_writer_write_element_unsigned_int(writer, | |
966 | config_element_type, ctx->ctx.u.perf_counter.type); | |
967 | if (ret) { | |
968 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
969 | goto end; | |
970 | } | |
971 | ||
972 | ret = config_writer_write_element_unsigned_int(writer, | |
973 | config_element_config, ctx->ctx.u.perf_counter.config); | |
974 | if (ret) { | |
975 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
976 | goto end; | |
977 | } | |
978 | ||
979 | ret = config_writer_write_element_string(writer, config_element_name, | |
980 | ctx->ctx.u.perf_counter.name); | |
981 | if (ret) { | |
982 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
983 | goto end; | |
984 | } | |
985 | ||
986 | /* /perf */ | |
987 | ret = config_writer_close_element(writer); | |
988 | if (ret) { | |
989 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
990 | goto end; | |
991 | } | |
992 | end: | |
993 | return ret; | |
994 | } | |
995 | ||
996 | static | |
997 | int save_ust_context_app_ctx(struct config_writer *writer, | |
998 | struct ltt_ust_context *ctx) | |
999 | { | |
1000 | int ret; | |
1001 | ||
1002 | assert(writer); | |
1003 | assert(ctx); | |
1004 | ||
1005 | /* Application contexts are saved as application_context_type */ | |
1006 | ret = config_writer_open_element(writer, config_element_context_app); | |
1007 | if (ret) { | |
1008 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1009 | goto end; | |
1010 | } | |
1011 | ||
1012 | ret = config_writer_write_element_string(writer, | |
1013 | config_element_context_app_provider_name, | |
1014 | ctx->ctx.u.app_ctx.provider_name); | |
1015 | if (ret) { | |
1016 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1017 | goto end; | |
1018 | } | |
1019 | ||
1020 | ret = config_writer_write_element_string(writer, | |
1021 | config_element_context_app_ctx_name, | |
1022 | ctx->ctx.u.app_ctx.ctx_name); | |
1023 | if (ret) { | |
1024 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1025 | goto end; | |
1026 | } | |
1027 | ||
1028 | /* /app */ | |
1029 | ret = config_writer_close_element(writer); | |
1030 | if (ret) { | |
1031 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1032 | goto end; | |
1033 | } | |
1034 | end: | |
1035 | return ret; | |
1036 | } | |
1037 | ||
1038 | static | |
1039 | int save_ust_context_generic(struct config_writer *writer, | |
1040 | struct ltt_ust_context *ctx) | |
1041 | { | |
1042 | int ret; | |
1043 | const char *context_type_string; | |
1044 | ||
1045 | assert(writer); | |
1046 | assert(ctx); | |
1047 | ||
1048 | /* Save context as event_context_type_type */ | |
1049 | context_type_string = get_ust_context_type_string( | |
1050 | ctx->ctx.ctx); | |
1051 | if (!context_type_string) { | |
1052 | ERR("Unsupported UST context type."); | |
1053 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1054 | goto end; | |
1055 | } | |
1056 | ||
1057 | ret = config_writer_write_element_string(writer, | |
1058 | config_element_type, context_type_string); | |
1059 | if (ret) { | |
1060 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1061 | goto end; | |
1062 | } | |
1063 | end: | |
1064 | return ret; | |
1065 | } | |
1066 | ||
fb198a11 JG |
1067 | static |
1068 | int save_ust_context(struct config_writer *writer, | |
1069 | struct cds_list_head *ctx_list) | |
1070 | { | |
1071 | int ret; | |
1072 | struct ltt_ust_context *ctx; | |
1073 | ||
1074 | assert(writer); | |
1075 | assert(ctx_list); | |
1076 | ||
1077 | ret = config_writer_open_element(writer, config_element_contexts); | |
1078 | if (ret) { | |
1079 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1080 | goto end; | |
1081 | } | |
1082 | ||
1083 | cds_list_for_each_entry(ctx, ctx_list, list) { | |
fb198a11 JG |
1084 | ret = config_writer_open_element(writer, |
1085 | config_element_context); | |
1086 | if (ret) { | |
1087 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1088 | goto end; | |
1089 | } | |
1090 | ||
045fc617 JG |
1091 | switch (ctx->ctx.ctx) { |
1092 | case LTTNG_UST_CONTEXT_PERF_THREAD_COUNTER: | |
1093 | ret = save_ust_context_perf_thread_counter(writer, ctx); | |
1094 | break; | |
1095 | case LTTNG_UST_CONTEXT_APP_CONTEXT: | |
1096 | ret = save_ust_context_app_ctx(writer, ctx); | |
1097 | break; | |
1098 | default: | |
1099 | /* Save generic context. */ | |
1100 | ret = save_ust_context_generic(writer, ctx); | |
1101 | } | |
1102 | if (ret) { | |
1103 | goto end; | |
fb198a11 JG |
1104 | } |
1105 | ||
1106 | /* /context */ | |
1107 | ret = config_writer_close_element(writer); | |
1108 | if (ret) { | |
1109 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1110 | goto end; | |
1111 | } | |
1112 | } | |
1113 | ||
1114 | /* /contexts */ | |
1115 | ret = config_writer_close_element(writer); | |
1116 | if (ret) { | |
1117 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1118 | goto end; | |
1119 | } | |
1120 | end: | |
1121 | return ret; | |
1122 | } | |
1123 | ||
1124 | static | |
1125 | int save_kernel_channel(struct config_writer *writer, | |
1126 | struct ltt_kernel_channel *kchan) | |
1127 | { | |
1128 | int ret; | |
1129 | ||
1130 | assert(writer); | |
1131 | assert(kchan); | |
1132 | ||
1133 | ret = config_writer_open_element(writer, config_element_channel); | |
1134 | if (ret) { | |
1135 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1136 | goto end; | |
1137 | } | |
1138 | ||
1139 | ret = config_writer_write_element_string(writer, config_element_name, | |
1140 | kchan->channel->name); | |
1141 | if (ret) { | |
1142 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1143 | goto end; | |
1144 | } | |
1145 | ||
1146 | ret = config_writer_write_element_bool(writer, config_element_enabled, | |
1147 | kchan->channel->enabled); | |
1148 | if (ret) { | |
1149 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1150 | goto end; | |
1151 | } | |
1152 | ||
1153 | ret = save_kernel_channel_attributes(writer, &kchan->channel->attr); | |
1154 | if (ret) { | |
1155 | goto end; | |
1156 | } | |
1157 | ||
0de3eda1 | 1158 | ret = save_kernel_events(writer, kchan); |
fb198a11 JG |
1159 | if (ret) { |
1160 | goto end; | |
1161 | } | |
1162 | ||
645328ae | 1163 | ret = save_kernel_contexts(writer, kchan); |
fb198a11 JG |
1164 | if (ret) { |
1165 | goto end; | |
1166 | } | |
1167 | ||
1168 | /* /channel */ | |
1169 | ret = config_writer_close_element(writer); | |
1170 | if (ret) { | |
1171 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1172 | goto end; | |
1173 | } | |
1174 | end: | |
1175 | return ret; | |
1176 | } | |
1177 | ||
1178 | static | |
1179 | int save_ust_channel(struct config_writer *writer, | |
1180 | struct ltt_ust_channel *ust_chan, | |
1181 | struct ltt_ust_session *session) | |
1182 | { | |
1183 | int ret; | |
1184 | ||
1185 | assert(writer); | |
1186 | assert(ust_chan); | |
1187 | assert(session); | |
1188 | ||
1189 | ret = config_writer_open_element(writer, config_element_channel); | |
1190 | if (ret) { | |
1191 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1192 | goto end; | |
1193 | } | |
1194 | ||
1195 | ret = config_writer_write_element_string(writer, config_element_name, | |
1196 | ust_chan->name); | |
1197 | if (ret) { | |
1198 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1199 | goto end; | |
1200 | } | |
1201 | ||
1202 | ret = config_writer_write_element_bool(writer, config_element_enabled, | |
1203 | ust_chan->enabled); | |
1204 | if (ret) { | |
1205 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1206 | goto end; | |
1207 | } | |
1208 | ||
1209 | ret = save_ust_channel_attributes(writer, &ust_chan->attr); | |
1210 | if (ret) { | |
1211 | goto end; | |
1212 | } | |
1213 | ||
1214 | ret = config_writer_write_element_unsigned_int(writer, | |
1215 | config_element_tracefile_size, ust_chan->tracefile_size); | |
1216 | if (ret) { | |
1217 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1218 | goto end; | |
1219 | } | |
1220 | ||
1221 | ret = config_writer_write_element_unsigned_int(writer, | |
1222 | config_element_tracefile_count, ust_chan->tracefile_count); | |
1223 | if (ret) { | |
1224 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1225 | goto end; | |
1226 | } | |
1227 | ||
1228 | ret = config_writer_write_element_unsigned_int(writer, | |
1229 | config_element_live_timer_interval, | |
1230 | session->live_timer_interval); | |
1231 | if (ret) { | |
1232 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1233 | goto end; | |
1234 | } | |
1235 | ||
51755dc8 JG |
1236 | if (ust_chan->domain == LTTNG_DOMAIN_UST) { |
1237 | ret = save_ust_events(writer, ust_chan->events); | |
1238 | if (ret) { | |
1239 | goto end; | |
1240 | } | |
1241 | } else { | |
1242 | struct agent *agent = NULL; | |
1243 | ||
1244 | agent = trace_ust_find_agent(session, ust_chan->domain); | |
1245 | if (!agent) { | |
1246 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1247 | ERR("Could not find agent associated to UST subdomain"); | |
1248 | goto end; | |
1249 | } | |
1250 | ||
1251 | /* | |
1252 | * Channels associated with a UST sub-domain (such as JUL, Log4j | |
1253 | * or Python) don't have any non-internal events. We retrieve | |
1254 | * the "agent" events associated with this channel and serialize | |
1255 | * them. | |
1256 | */ | |
1257 | ret = save_agent_events(writer, ust_chan, agent); | |
1258 | if (ret) { | |
1259 | goto end; | |
1260 | } | |
fb198a11 JG |
1261 | } |
1262 | ||
1263 | ret = save_ust_context(writer, &ust_chan->ctx_list); | |
1264 | if (ret) { | |
1265 | goto end; | |
1266 | } | |
1267 | ||
1268 | /* /channel */ | |
1269 | ret = config_writer_close_element(writer); | |
1270 | if (ret) { | |
1271 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1272 | goto end; | |
1273 | } | |
1274 | end: | |
1275 | return ret; | |
1276 | } | |
1277 | ||
1278 | static | |
1279 | int save_kernel_session(struct config_writer *writer, | |
1280 | struct ltt_session *session) | |
1281 | { | |
1282 | int ret; | |
1283 | struct ltt_kernel_channel *kchan; | |
1284 | ||
1285 | assert(writer); | |
1286 | assert(session); | |
1287 | ||
1288 | ret = config_writer_write_element_string(writer, config_element_type, | |
1289 | config_domain_type_kernel); | |
1290 | if (ret) { | |
1291 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1292 | goto end; | |
1293 | } | |
1294 | ||
1295 | ret = config_writer_write_element_string(writer, | |
1296 | config_element_buffer_type, config_buffer_type_global); | |
1297 | if (ret) { | |
1298 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1299 | goto end; | |
1300 | } | |
1301 | ||
1302 | ret = config_writer_open_element(writer, | |
1303 | config_element_channels); | |
1304 | if (ret) { | |
1305 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1306 | goto end; | |
1307 | } | |
1308 | ||
1309 | cds_list_for_each_entry(kchan, &session->kernel_session->channel_list.head, | |
1310 | list) { | |
1311 | ret = save_kernel_channel(writer, kchan); | |
1312 | if (ret) { | |
1313 | goto end; | |
1314 | } | |
1315 | } | |
1316 | ||
1317 | /* /channels */ | |
1318 | ret = config_writer_close_element(writer); | |
1319 | if (ret) { | |
1320 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1321 | goto end; | |
1322 | } | |
1323 | end: | |
1324 | return ret; | |
1325 | } | |
1326 | ||
1327 | static | |
51755dc8 JG |
1328 | const char *get_config_domain_str(enum lttng_domain_type domain) |
1329 | { | |
1330 | const char *str_dom; | |
1331 | ||
1332 | switch (domain) { | |
1333 | case LTTNG_DOMAIN_KERNEL: | |
1334 | str_dom = config_domain_type_kernel; | |
1335 | break; | |
1336 | case LTTNG_DOMAIN_UST: | |
1337 | str_dom = config_domain_type_ust; | |
1338 | break; | |
1339 | case LTTNG_DOMAIN_JUL: | |
1340 | str_dom = config_domain_type_jul; | |
1341 | break; | |
1342 | case LTTNG_DOMAIN_LOG4J: | |
1343 | str_dom = config_domain_type_log4j; | |
1344 | break; | |
1345 | case LTTNG_DOMAIN_PYTHON: | |
1346 | str_dom = config_domain_type_python; | |
1347 | break; | |
1348 | default: | |
1349 | assert(0); | |
1350 | } | |
1351 | ||
1352 | return str_dom; | |
1353 | } | |
1354 | ||
e8fcabef JG |
1355 | static |
1356 | int save_pid_tracker(struct config_writer *writer, | |
1357 | struct ltt_session *sess, int domain) | |
1358 | { | |
1359 | int ret = 0; | |
1360 | ssize_t nr_pids = 0, i; | |
1361 | int32_t *pids = NULL; | |
1362 | ||
1363 | switch (domain) { | |
1364 | case LTTNG_DOMAIN_KERNEL: | |
1365 | { | |
1366 | nr_pids = kernel_list_tracker_pids(sess->kernel_session, &pids); | |
1367 | if (nr_pids < 0) { | |
1368 | ret = LTTNG_ERR_KERN_LIST_FAIL; | |
1369 | goto end; | |
1370 | } | |
1371 | break; | |
1372 | } | |
1373 | case LTTNG_DOMAIN_UST: | |
1374 | { | |
1375 | nr_pids = trace_ust_list_tracker_pids(sess->ust_session, &pids); | |
1376 | if (nr_pids < 0) { | |
1377 | ret = LTTNG_ERR_UST_LIST_FAIL; | |
1378 | goto end; | |
1379 | } | |
1380 | break; | |
1381 | } | |
1382 | case LTTNG_DOMAIN_JUL: | |
1383 | case LTTNG_DOMAIN_LOG4J: | |
1384 | case LTTNG_DOMAIN_PYTHON: | |
1385 | default: | |
1386 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; | |
1387 | goto end; | |
1388 | } | |
1389 | ||
1390 | /* Only create a pid_tracker if enabled or untrack all */ | |
1391 | if (nr_pids != 1 || (nr_pids == 1 && pids[0] != -1)) { | |
1392 | ret = config_writer_open_element(writer, | |
1393 | config_element_pid_tracker); | |
1394 | if (ret) { | |
1395 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1396 | goto end; | |
1397 | } | |
1398 | ||
1399 | ret = config_writer_open_element(writer, | |
1400 | config_element_targets); | |
1401 | if (ret) { | |
1402 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1403 | goto end; | |
1404 | } | |
1405 | ||
1406 | for (i = 0; i < nr_pids; i++) { | |
1407 | ret = config_writer_open_element(writer, | |
1408 | config_element_target_pid); | |
1409 | if (ret) { | |
1410 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1411 | goto end; | |
1412 | } | |
1413 | ||
1414 | ret = config_writer_write_element_unsigned_int(writer, | |
1415 | config_element_pid, pids[i]); | |
1416 | if (ret) { | |
1417 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1418 | goto end; | |
1419 | } | |
1420 | ||
1421 | /* /pid_target */ | |
1422 | ret = config_writer_close_element(writer); | |
1423 | if (ret) { | |
1424 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1425 | goto end; | |
1426 | } | |
1427 | } | |
1428 | ||
1429 | /* /targets */ | |
1430 | ret = config_writer_close_element(writer); | |
1431 | if (ret) { | |
1432 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1433 | goto end; | |
1434 | } | |
1435 | ||
1436 | /* /pid_tracker */ | |
1437 | ret = config_writer_close_element(writer); | |
1438 | if (ret) { | |
1439 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1440 | goto end; | |
1441 | } | |
1442 | } | |
1443 | end: | |
1444 | free(pids); | |
1445 | return ret; | |
1446 | } | |
1447 | ||
51755dc8 JG |
1448 | static |
1449 | int save_ust_domain(struct config_writer *writer, | |
1450 | struct ltt_session *session, enum lttng_domain_type domain) | |
fb198a11 JG |
1451 | { |
1452 | int ret; | |
1453 | struct ltt_ust_channel *ust_chan; | |
1454 | const char *buffer_type_string; | |
1455 | struct lttng_ht_node_str *node; | |
1456 | struct lttng_ht_iter iter; | |
51755dc8 | 1457 | const char *config_domain_name; |
fb198a11 JG |
1458 | |
1459 | assert(writer); | |
1460 | assert(session); | |
1461 | ||
51755dc8 JG |
1462 | ret = config_writer_open_element(writer, |
1463 | config_element_domain); | |
1464 | if (ret) { | |
1465 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1466 | goto end; | |
1467 | } | |
1468 | ||
1469 | config_domain_name = get_config_domain_str(domain); | |
1470 | if (!config_domain_name) { | |
1471 | ret = LTTNG_ERR_INVALID; | |
1472 | goto end; | |
1473 | } | |
1474 | ||
1475 | ret = config_writer_write_element_string(writer, | |
1476 | config_element_type, config_domain_name); | |
fb198a11 JG |
1477 | if (ret) { |
1478 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1479 | goto end; | |
1480 | } | |
1481 | ||
1482 | buffer_type_string = get_buffer_type_string( | |
1483 | session->ust_session->buffer_type); | |
1484 | if (!buffer_type_string) { | |
1485 | ERR("Unsupported buffer type."); | |
1486 | ret = LTTNG_ERR_INVALID; | |
1487 | goto end; | |
1488 | } | |
1489 | ||
1490 | ret = config_writer_write_element_string(writer, | |
1491 | config_element_buffer_type, buffer_type_string); | |
1492 | if (ret) { | |
1493 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1494 | goto end; | |
1495 | } | |
1496 | ||
1497 | ret = config_writer_open_element(writer, config_element_channels); | |
1498 | if (ret) { | |
1499 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1500 | goto end; | |
1501 | } | |
1502 | ||
1503 | rcu_read_lock(); | |
1504 | cds_lfht_for_each_entry(session->ust_session->domain_global.channels->ht, | |
1505 | &iter.iter, node, node) { | |
fb198a11 | 1506 | ust_chan = caa_container_of(node, struct ltt_ust_channel, node); |
51755dc8 | 1507 | if (domain == ust_chan->domain) { |
fb198a11 JG |
1508 | ret = save_ust_channel(writer, ust_chan, session->ust_session); |
1509 | if (ret) { | |
1510 | rcu_read_unlock(); | |
1511 | goto end; | |
1512 | } | |
1513 | } | |
1514 | } | |
1515 | rcu_read_unlock(); | |
1516 | ||
1517 | /* /channels */ | |
1518 | ret = config_writer_close_element(writer); | |
1519 | if (ret) { | |
1520 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1521 | goto end; | |
1522 | } | |
51755dc8 | 1523 | |
e8fcabef | 1524 | if (domain == LTTNG_DOMAIN_UST) { |
847a5916 | 1525 | ret = config_writer_open_element(writer, |
e8fcabef | 1526 | config_element_trackers); |
847a5916 JR |
1527 | if (ret) { |
1528 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1529 | goto end; | |
1530 | } | |
1531 | ||
e8fcabef | 1532 | ret = save_pid_tracker(writer, session, LTTNG_DOMAIN_UST); |
847a5916 | 1533 | if (ret) { |
847a5916 JR |
1534 | goto end; |
1535 | } | |
1536 | ||
e8fcabef | 1537 | /* /trackers */ |
847a5916 JR |
1538 | ret = config_writer_close_element(writer); |
1539 | if (ret) { | |
847a5916 JR |
1540 | goto end; |
1541 | } | |
e8fcabef | 1542 | } |
847a5916 | 1543 | |
e8fcabef JG |
1544 | /* /domain */ |
1545 | ret = config_writer_close_element(writer); | |
1546 | if (ret) { | |
1547 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1548 | goto end; | |
847a5916 | 1549 | } |
e8fcabef | 1550 | |
847a5916 | 1551 | end: |
847a5916 JR |
1552 | return ret; |
1553 | } | |
1554 | ||
fb198a11 JG |
1555 | static |
1556 | int save_domains(struct config_writer *writer, struct ltt_session *session) | |
1557 | { | |
1558 | int ret = 0; | |
1559 | ||
1560 | assert(writer); | |
1561 | assert(session); | |
1562 | ||
1563 | if (!session->kernel_session && !session->ust_session) { | |
1564 | goto end; | |
1565 | } | |
1566 | ||
1567 | ret = config_writer_open_element(writer, config_element_domains); | |
1568 | if (ret) { | |
1569 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1570 | goto end; | |
1571 | } | |
1572 | ||
1573 | ||
1574 | if (session->kernel_session) { | |
1575 | ret = config_writer_open_element(writer, | |
1576 | config_element_domain); | |
1577 | if (ret) { | |
1578 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1579 | goto end; | |
1580 | } | |
1581 | ||
1582 | ret = save_kernel_session(writer, session); | |
1583 | if (ret) { | |
1584 | goto end; | |
1585 | } | |
1586 | ||
847a5916 JR |
1587 | ret = config_writer_open_element(writer, |
1588 | config_element_trackers); | |
1589 | if (ret) { | |
1590 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1591 | goto end; | |
1592 | } | |
1593 | ||
1594 | ret = save_pid_tracker(writer, session, LTTNG_DOMAIN_KERNEL); | |
1595 | if (ret) { | |
1596 | goto end; | |
1597 | } | |
1598 | ||
1599 | /* /trackers */ | |
1600 | ret = config_writer_close_element(writer); | |
1601 | if (ret) { | |
1602 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1603 | goto end; | |
1604 | } | |
fb198a11 JG |
1605 | /* /domain */ |
1606 | ret = config_writer_close_element(writer); | |
1607 | if (ret) { | |
1608 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1609 | goto end; | |
1610 | } | |
1611 | } | |
1612 | ||
1613 | if (session->ust_session) { | |
51755dc8 | 1614 | ret = save_ust_domain(writer, session, LTTNG_DOMAIN_UST); |
fb198a11 JG |
1615 | if (ret) { |
1616 | goto end; | |
1617 | } | |
1618 | ||
51755dc8 | 1619 | ret = save_ust_domain(writer, session, LTTNG_DOMAIN_JUL); |
fb198a11 | 1620 | if (ret) { |
fb198a11 JG |
1621 | goto end; |
1622 | } | |
fb198a11 | 1623 | |
51755dc8 JG |
1624 | ret = save_ust_domain(writer, session, LTTNG_DOMAIN_LOG4J); |
1625 | if (ret) { | |
1626 | goto end; | |
1627 | } | |
65d72c41 | 1628 | |
51755dc8 JG |
1629 | ret = save_ust_domain(writer, session, LTTNG_DOMAIN_PYTHON); |
1630 | if (ret) { | |
1631 | goto end; | |
fb198a11 JG |
1632 | } |
1633 | } | |
1634 | ||
1635 | /* /domains */ | |
1636 | ret = config_writer_close_element(writer); | |
1637 | if (ret) { | |
1638 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1639 | goto end; | |
1640 | } | |
1641 | end: | |
1642 | return ret; | |
1643 | } | |
1644 | ||
1645 | static | |
1646 | int save_consumer_output(struct config_writer *writer, | |
1647 | struct consumer_output *output) | |
1648 | { | |
1649 | int ret; | |
1650 | ||
1651 | assert(writer); | |
1652 | assert(output); | |
1653 | ||
1654 | ret = config_writer_open_element(writer, config_element_consumer_output); | |
1655 | if (ret) { | |
1656 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1657 | goto end; | |
1658 | } | |
1659 | ||
1660 | ret = config_writer_write_element_bool(writer, config_element_enabled, | |
1661 | output->enabled); | |
1662 | if (ret) { | |
1663 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1664 | goto end; | |
1665 | } | |
1666 | ||
1667 | ret = config_writer_open_element(writer, config_element_destination); | |
1668 | if (ret) { | |
1669 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1670 | goto end; | |
1671 | } | |
1672 | ||
1673 | switch (output->type) { | |
1674 | case CONSUMER_DST_LOCAL: | |
1675 | ret = config_writer_write_element_string(writer, | |
366a9222 | 1676 | config_element_path, output->dst.session_root_path); |
fb198a11 JG |
1677 | if (ret) { |
1678 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1679 | goto end; | |
1680 | } | |
1681 | break; | |
1682 | case CONSUMER_DST_NET: | |
1683 | { | |
1684 | char *uri; | |
1685 | ||
1686 | uri = zmalloc(PATH_MAX); | |
1687 | if (!uri) { | |
1688 | ret = LTTNG_ERR_NOMEM; | |
1689 | goto end; | |
1690 | } | |
1691 | ||
1692 | ret = config_writer_open_element(writer, config_element_net_output); | |
1693 | if (ret) { | |
1694 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1695 | goto end_net_output; | |
1696 | } | |
1697 | ||
1698 | if (output->dst.net.control_isset && | |
1699 | output->dst.net.data_isset) { | |
1700 | ret = uri_to_str_url(&output->dst.net.control, uri, PATH_MAX); | |
1701 | if (ret < 0) { | |
1702 | ret = LTTNG_ERR_INVALID; | |
1703 | goto end_net_output; | |
1704 | } | |
1705 | ||
1706 | ret = config_writer_write_element_string(writer, | |
1707 | config_element_control_uri, uri); | |
1708 | if (ret) { | |
1709 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1710 | goto end_net_output; | |
1711 | } | |
1712 | ||
1713 | ret = uri_to_str_url(&output->dst.net.data, uri, PATH_MAX); | |
1714 | if (ret < 0) { | |
1715 | ret = LTTNG_ERR_INVALID; | |
1716 | goto end_net_output; | |
1717 | } | |
1718 | ||
1719 | ret = config_writer_write_element_string(writer, | |
1720 | config_element_data_uri, uri); | |
1721 | if (ret) { | |
1722 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1723 | goto end_net_output; | |
1724 | } | |
1725 | ||
1726 | end_net_output: | |
1727 | free(uri); | |
1728 | if (ret) { | |
1729 | goto end; | |
1730 | } | |
1731 | } else { | |
1732 | ret = !output->dst.net.control_isset ? | |
1733 | LTTNG_ERR_URL_CTRL_MISS : | |
1734 | LTTNG_ERR_URL_DATA_MISS; | |
c39270e5 | 1735 | free(uri); |
fb198a11 JG |
1736 | goto end; |
1737 | } | |
1738 | ||
1739 | ret = config_writer_close_element(writer); | |
1740 | if (ret) { | |
1741 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1742 | goto end; | |
1743 | } | |
1744 | break; | |
1745 | } | |
1746 | default: | |
1747 | ERR("Unsupported consumer output type."); | |
1748 | ret = LTTNG_ERR_INVALID; | |
1749 | goto end; | |
1750 | } | |
1751 | ||
1752 | /* /destination */ | |
1753 | ret = config_writer_close_element(writer); | |
1754 | if (ret) { | |
1755 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1756 | goto end; | |
1757 | } | |
1758 | ||
1759 | /* /consumer_output */ | |
1760 | ret = config_writer_close_element(writer); | |
1761 | if (ret) { | |
1762 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1763 | goto end; | |
1764 | } | |
1765 | end: | |
1766 | return ret; | |
1767 | } | |
1768 | ||
1769 | static | |
1770 | int save_snapshot_outputs(struct config_writer *writer, | |
1771 | struct snapshot *snapshot) | |
1772 | { | |
1773 | int ret; | |
1774 | struct lttng_ht_iter iter; | |
1775 | struct snapshot_output *output; | |
1776 | ||
1777 | assert(writer); | |
1778 | assert(snapshot); | |
1779 | ||
1780 | ret = config_writer_open_element(writer, config_element_snapshot_outputs); | |
1781 | if (ret) { | |
1782 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1783 | goto end; | |
1784 | } | |
1785 | ||
1786 | rcu_read_lock(); | |
1787 | cds_lfht_for_each_entry(snapshot->output_ht->ht, &iter.iter, output, | |
1788 | node.node) { | |
1789 | ret = config_writer_open_element(writer, | |
1790 | config_element_output); | |
1791 | if (ret) { | |
1792 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1793 | goto end_unlock; | |
1794 | } | |
1795 | ||
1796 | ret = config_writer_write_element_string(writer, | |
1797 | config_element_name, output->name); | |
1798 | if (ret) { | |
1799 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1800 | goto end_unlock; | |
1801 | } | |
1802 | ||
1803 | ret = config_writer_write_element_unsigned_int(writer, | |
1804 | config_element_max_size, output->max_size); | |
1805 | if (ret) { | |
1806 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1807 | goto end_unlock; | |
1808 | } | |
1809 | ||
1810 | ret = save_consumer_output(writer, output->consumer); | |
1811 | if (ret) { | |
1812 | goto end_unlock; | |
1813 | } | |
1814 | ||
1815 | /* /output */ | |
1816 | ret = config_writer_close_element(writer); | |
1817 | if (ret) { | |
1818 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1819 | goto end_unlock; | |
1820 | } | |
1821 | } | |
1822 | rcu_read_unlock(); | |
1823 | ||
1824 | /* /snapshot_outputs */ | |
1825 | ret = config_writer_close_element(writer); | |
1826 | if (ret) { | |
1827 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1828 | goto end; | |
1829 | } | |
1830 | ||
1831 | end: | |
1832 | return ret; | |
1833 | end_unlock: | |
1834 | rcu_read_unlock(); | |
1835 | return ret; | |
1836 | } | |
1837 | ||
1838 | static | |
1839 | int save_session_output(struct config_writer *writer, | |
1840 | struct ltt_session *session) | |
1841 | { | |
1842 | int ret; | |
1843 | ||
1844 | assert(writer); | |
1845 | assert(session); | |
1846 | ||
1847 | if ((session->snapshot_mode && session->snapshot.nb_output == 0) || | |
1848 | (!session->snapshot_mode && !session->consumer)) { | |
1849 | /* Session is in no output mode */ | |
1850 | ret = 0; | |
1851 | goto end; | |
1852 | } | |
1853 | ||
1854 | ret = config_writer_open_element(writer, config_element_output); | |
1855 | if (ret) { | |
1856 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1857 | goto end; | |
1858 | } | |
1859 | ||
1860 | if (session->snapshot_mode) { | |
1861 | ret = save_snapshot_outputs(writer, &session->snapshot); | |
1862 | if (ret) { | |
1863 | goto end; | |
1864 | } | |
1865 | } else { | |
1866 | if (session->consumer) { | |
1867 | ret = save_consumer_output(writer, session->consumer); | |
1868 | if (ret) { | |
1869 | goto end; | |
1870 | } | |
1871 | } | |
1872 | } | |
1873 | ||
1874 | /* /output */ | |
1875 | ret = config_writer_close_element(writer); | |
1876 | if (ret) { | |
1877 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1878 | goto end; | |
1879 | } | |
1880 | end: | |
1881 | return ret; | |
1882 | } | |
1883 | ||
1884 | /* | |
1885 | * Save the given session. | |
1886 | * | |
1887 | * Return 0 on success else a LTTNG_ERR* code. | |
1888 | */ | |
1889 | static | |
1890 | int save_session(struct ltt_session *session, | |
1891 | struct lttng_save_session_attr *attr, lttng_sock_cred *creds) | |
1892 | { | |
1893 | int ret, fd; | |
db471218 | 1894 | unsigned int file_opened = 0; /* Indicate if the file has been opened */ |
fb198a11 JG |
1895 | char config_file_path[PATH_MAX]; |
1896 | size_t len; | |
1897 | struct config_writer *writer = NULL; | |
1898 | size_t session_name_len; | |
1899 | const char *provided_path; | |
1900 | ||
1901 | assert(session); | |
1902 | assert(attr); | |
1903 | assert(creds); | |
1904 | ||
1905 | session_name_len = strlen(session->name); | |
95a29ab8 | 1906 | memset(config_file_path, 0, sizeof(config_file_path)); |
fb198a11 JG |
1907 | |
1908 | if (!session_access_ok(session, | |
1909 | LTTNG_SOCK_GET_UID_CRED(creds), | |
1910 | LTTNG_SOCK_GET_GID_CRED(creds))) { | |
1911 | ret = LTTNG_ERR_EPERM; | |
1912 | goto end; | |
1913 | } | |
1914 | ||
1915 | provided_path = lttng_save_session_attr_get_output_url(attr); | |
1916 | if (provided_path) { | |
95a29ab8 | 1917 | DBG3("Save session in provided path %s", provided_path); |
fb198a11 | 1918 | len = strlen(provided_path); |
d2992717 | 1919 | if (len >= sizeof(config_file_path)) { |
fb198a11 JG |
1920 | ret = LTTNG_ERR_SET_URL; |
1921 | goto end; | |
1922 | } | |
1923 | strncpy(config_file_path, provided_path, len); | |
1924 | } else { | |
7e078ad1 | 1925 | ssize_t ret_len; |
fb198a11 JG |
1926 | char *home_dir = utils_get_user_home_dir( |
1927 | LTTNG_SOCK_GET_UID_CRED(creds)); | |
1928 | if (!home_dir) { | |
1929 | ret = LTTNG_ERR_SET_URL; | |
1930 | goto end; | |
1931 | } | |
1932 | ||
d2992717 | 1933 | ret_len = snprintf(config_file_path, sizeof(config_file_path), |
fb198a11 JG |
1934 | DEFAULT_SESSION_HOME_CONFIGPATH, home_dir); |
1935 | free(home_dir); | |
7e078ad1 | 1936 | if (ret_len < 0) { |
fb198a11 JG |
1937 | PERROR("snprintf save session"); |
1938 | ret = LTTNG_ERR_SET_URL; | |
1939 | goto end; | |
1940 | } | |
7e078ad1 | 1941 | len = ret_len; |
fb198a11 JG |
1942 | } |
1943 | ||
1944 | /* | |
d2992717 DG |
1945 | * Check the path fits in the config file path dst including the '/' |
1946 | * followed by trailing .lttng extension and the NULL terminated string. | |
fb198a11 | 1947 | */ |
d2992717 DG |
1948 | if ((len + session_name_len + 2 + |
1949 | sizeof(DEFAULT_SESSION_CONFIG_FILE_EXTENSION)) | |
1950 | > sizeof(config_file_path)) { | |
fb198a11 JG |
1951 | ret = LTTNG_ERR_SET_URL; |
1952 | goto end; | |
1953 | } | |
1954 | ||
1955 | ret = run_as_mkdir_recursive(config_file_path, S_IRWXU | S_IRWXG, | |
1956 | LTTNG_SOCK_GET_UID_CRED(creds), LTTNG_SOCK_GET_GID_CRED(creds)); | |
1957 | if (ret) { | |
1958 | ret = LTTNG_ERR_SET_URL; | |
1959 | goto end; | |
1960 | } | |
1961 | ||
d2992717 DG |
1962 | /* |
1963 | * At this point, we know that everything fits in the buffer. Validation | |
1964 | * was done just above. | |
1965 | */ | |
fb198a11 JG |
1966 | config_file_path[len++] = '/'; |
1967 | strncpy(config_file_path + len, session->name, session_name_len); | |
1968 | len += session_name_len; | |
1969 | strcpy(config_file_path + len, DEFAULT_SESSION_CONFIG_FILE_EXTENSION); | |
95a29ab8 DG |
1970 | len += sizeof(DEFAULT_SESSION_CONFIG_FILE_EXTENSION); |
1971 | config_file_path[len] = '\0'; | |
fb198a11 JG |
1972 | |
1973 | if (!access(config_file_path, F_OK) && !attr->overwrite) { | |
f9b57ab2 DG |
1974 | /* File exists, notify the user since the overwrite flag is off. */ |
1975 | ret = LTTNG_ERR_SAVE_FILE_EXIST; | |
fb198a11 JG |
1976 | goto end; |
1977 | } | |
1978 | ||
1979 | fd = run_as_open(config_file_path, O_CREAT | O_WRONLY | O_TRUNC, | |
1980 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP, | |
1981 | LTTNG_SOCK_GET_UID_CRED(creds), LTTNG_SOCK_GET_GID_CRED(creds)); | |
1982 | if (fd < 0) { | |
1983 | PERROR("Could not create configuration file"); | |
1984 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1985 | goto end; | |
1986 | } | |
db471218 | 1987 | file_opened = 1; |
fb198a11 | 1988 | |
705bb62f | 1989 | writer = config_writer_create(fd, 1); |
fb198a11 JG |
1990 | if (!writer) { |
1991 | ret = LTTNG_ERR_NOMEM; | |
1992 | goto end; | |
1993 | } | |
1994 | ||
1995 | ret = config_writer_open_element(writer, config_element_sessions); | |
1996 | if (ret) { | |
1997 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1998 | goto end; | |
1999 | } | |
2000 | ||
2001 | ret = config_writer_open_element(writer, config_element_session); | |
2002 | if (ret) { | |
2003 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2004 | goto end; | |
2005 | } | |
2006 | ||
2007 | ret = config_writer_write_element_string(writer, config_element_name, | |
2008 | session->name); | |
2009 | if (ret) { | |
2010 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2011 | goto end; | |
2012 | } | |
2013 | ||
9e7c9f56 JR |
2014 | if(session->shm_path[0] != '\0') { |
2015 | ret = config_writer_write_element_string(writer, | |
2016 | config_element_shared_memory_path, | |
2017 | session->shm_path); | |
2018 | if (ret) { | |
2019 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2020 | goto end; | |
2021 | } | |
2022 | } | |
2023 | ||
fb198a11 JG |
2024 | ret = save_domains(writer, session); |
2025 | if (ret) { | |
2026 | goto end; | |
2027 | } | |
2028 | ||
2029 | ret = config_writer_write_element_bool(writer, config_element_started, | |
8382cf6f | 2030 | session->active); |
fb198a11 JG |
2031 | if (ret) { |
2032 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2033 | goto end; | |
2034 | } | |
2035 | ||
329f3443 JD |
2036 | if (session->snapshot_mode || session->live_timer || |
2037 | session->rotate_timer_period || session->rotate_size) { | |
fb198a11 JG |
2038 | ret = config_writer_open_element(writer, config_element_attributes); |
2039 | if (ret) { | |
2040 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2041 | goto end; | |
2042 | } | |
2043 | ||
2044 | if (session->snapshot_mode) { | |
2045 | ret = config_writer_write_element_bool(writer, | |
2046 | config_element_snapshot_mode, 1); | |
2047 | if (ret) { | |
2048 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2049 | goto end; | |
2050 | } | |
329f3443 | 2051 | } else if (session->live_timer) { |
d98ad589 | 2052 | ret = config_writer_write_element_unsigned_int(writer, |
fb198a11 JG |
2053 | config_element_live_timer_interval, session->live_timer); |
2054 | if (ret) { | |
2055 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2056 | goto end; | |
2057 | } | |
2058 | } | |
329f3443 JD |
2059 | if (session->rotate_timer_period) { |
2060 | ret = config_writer_write_element_unsigned_int(writer, | |
2061 | config_element_rotation_timer_interval, | |
2062 | session->rotate_timer_period); | |
2063 | if (ret) { | |
2064 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2065 | goto end; | |
2066 | } | |
2067 | } | |
2068 | ||
2069 | if (session->rotate_size) { | |
2070 | ret = config_writer_write_element_unsigned_int(writer, | |
2071 | config_element_rotation_size, | |
2072 | session->rotate_size); | |
2073 | if (ret) { | |
2074 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2075 | goto end; | |
2076 | } | |
2077 | } | |
fb198a11 JG |
2078 | |
2079 | /* /attributes */ | |
2080 | ret = config_writer_close_element(writer); | |
2081 | if (ret) { | |
2082 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2083 | goto end; | |
2084 | } | |
2085 | } | |
2086 | ||
2087 | ret = save_session_output(writer, session); | |
2088 | if (ret) { | |
2089 | goto end; | |
2090 | } | |
2091 | ||
2092 | /* /session */ | |
2093 | ret = config_writer_close_element(writer); | |
2094 | if (ret) { | |
2095 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2096 | goto end; | |
2097 | } | |
2098 | ||
2099 | /* /sessions */ | |
2100 | ret = config_writer_close_element(writer); | |
2101 | if (ret) { | |
2102 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2103 | goto end; | |
2104 | } | |
2105 | end: | |
2106 | if (writer && config_writer_destroy(writer)) { | |
2107 | /* Preserve the original error code */ | |
2108 | ret = ret ? ret : LTTNG_ERR_SAVE_IO_FAIL; | |
2109 | } | |
2110 | if (ret) { | |
2111 | /* Delete file in case of error */ | |
db471218 | 2112 | if (file_opened && unlink(config_file_path)) { |
fb198a11 JG |
2113 | PERROR("Unlinking XML session configuration."); |
2114 | } | |
2115 | } | |
2116 | ||
1d12100d JR |
2117 | if (file_opened) { |
2118 | ret = close(fd); | |
2119 | if (ret) { | |
2120 | PERROR("Closing XML session configuration"); | |
2121 | } | |
2122 | } | |
2123 | ||
fb198a11 JG |
2124 | return ret; |
2125 | } | |
2126 | ||
2127 | int cmd_save_sessions(struct lttng_save_session_attr *attr, | |
2128 | lttng_sock_cred *creds) | |
2129 | { | |
2130 | int ret; | |
2131 | const char *session_name; | |
2132 | struct ltt_session *session; | |
2133 | ||
2134 | session_lock_list(); | |
2135 | ||
2136 | session_name = lttng_save_session_attr_get_session_name(attr); | |
2137 | if (session_name) { | |
2138 | session = session_find_by_name(session_name); | |
2139 | if (!session) { | |
2140 | ret = LTTNG_ERR_SESS_NOT_FOUND; | |
2141 | goto end; | |
2142 | } | |
2143 | ||
2144 | session_lock(session); | |
2145 | ret = save_session(session, attr, creds); | |
2146 | session_unlock(session); | |
2147 | if (ret) { | |
2148 | goto end; | |
2149 | } | |
2150 | } else { | |
2151 | struct ltt_session_list *list = session_get_list(); | |
2152 | ||
2153 | cds_list_for_each_entry(session, &list->head, list) { | |
2154 | session_lock(session); | |
2155 | ret = save_session(session, attr, creds); | |
2156 | session_unlock(session); | |
2157 | ||
2158 | /* Don't abort if we don't have the required permissions. */ | |
2159 | if (ret && ret != LTTNG_ERR_EPERM) { | |
2160 | goto end; | |
2161 | } | |
2162 | } | |
2163 | } | |
2164 | ret = LTTNG_OK; | |
2165 | ||
2166 | end: | |
2167 | session_unlock_list(); | |
2168 | return ret; | |
2169 | } |