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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 | ||
18 | #define _GNU_SOURCE | |
6c1c0768 | 19 | #define _LGPL_SOURCE |
fb198a11 JG |
20 | #include <assert.h> |
21 | #include <inttypes.h> | |
22 | #include <string.h> | |
23 | #include <urcu/uatomic.h> | |
24 | #include <unistd.h> | |
25 | ||
26 | #include <common/defaults.h> | |
27 | #include <common/error.h> | |
28 | #include <common/config/config.h> | |
fb198a11 JG |
29 | #include <common/utils.h> |
30 | #include <common/runas.h> | |
31 | #include <lttng/save-internal.h> | |
32 | ||
33 | #include "save.h" | |
34 | #include "session.h" | |
0de3eda1 | 35 | #include "syscall.h" |
fb198a11 JG |
36 | #include "trace-ust.h" |
37 | ||
38 | static | |
39 | int save_kernel_channel_attributes(struct config_writer *writer, | |
40 | struct lttng_channel_attr *attr) | |
41 | { | |
42 | int ret; | |
43 | ||
44 | ret = config_writer_write_element_string(writer, | |
45 | config_element_overwrite_mode, | |
46 | attr->overwrite ? config_overwrite_mode_overwrite : | |
47 | config_overwrite_mode_discard); | |
48 | if (ret) { | |
49 | goto end; | |
50 | } | |
51 | ||
52 | ret = config_writer_write_element_unsigned_int(writer, | |
53 | config_element_subbuf_size, attr->subbuf_size); | |
54 | if (ret) { | |
55 | goto end; | |
56 | } | |
57 | ||
58 | ret = config_writer_write_element_unsigned_int(writer, | |
59 | config_element_num_subbuf, | |
60 | attr->num_subbuf); | |
61 | if (ret) { | |
62 | goto end; | |
63 | } | |
64 | ||
65 | ret = config_writer_write_element_unsigned_int(writer, | |
66 | config_element_switch_timer_interval, | |
67 | attr->switch_timer_interval); | |
68 | if (ret) { | |
69 | goto end; | |
70 | } | |
71 | ||
72 | ret = config_writer_write_element_unsigned_int(writer, | |
73 | config_element_read_timer_interval, | |
74 | attr->read_timer_interval); | |
75 | if (ret) { | |
76 | goto end; | |
77 | } | |
78 | ||
79 | ret = config_writer_write_element_string(writer, | |
80 | config_element_output_type, | |
81 | attr->output == LTTNG_EVENT_SPLICE ? | |
82 | config_output_type_splice : config_output_type_mmap); | |
83 | if (ret) { | |
84 | goto end; | |
85 | } | |
86 | ||
87 | ret = config_writer_write_element_unsigned_int(writer, | |
88 | config_element_tracefile_size, attr->tracefile_size); | |
89 | if (ret) { | |
90 | goto end; | |
91 | } | |
92 | ||
93 | ret = config_writer_write_element_unsigned_int(writer, | |
94 | config_element_tracefile_count, | |
95 | attr->tracefile_count); | |
96 | if (ret) { | |
97 | goto end; | |
98 | } | |
99 | ||
100 | ret = config_writer_write_element_unsigned_int(writer, | |
101 | config_element_live_timer_interval, | |
102 | attr->live_timer_interval); | |
103 | if (ret) { | |
104 | goto end; | |
105 | } | |
106 | end: | |
107 | return ret ? LTTNG_ERR_SAVE_IO_FAIL : 0; | |
108 | } | |
109 | ||
110 | static | |
111 | int save_ust_channel_attributes(struct config_writer *writer, | |
112 | struct lttng_ust_channel_attr *attr) | |
113 | { | |
114 | int ret; | |
115 | ||
116 | ret = config_writer_write_element_string(writer, | |
117 | config_element_overwrite_mode, | |
118 | attr->overwrite ? config_overwrite_mode_overwrite : | |
119 | config_overwrite_mode_discard); | |
120 | if (ret) { | |
121 | goto end; | |
122 | } | |
123 | ||
124 | ret = config_writer_write_element_unsigned_int(writer, | |
125 | config_element_subbuf_size, attr->subbuf_size); | |
126 | if (ret) { | |
127 | goto end; | |
128 | } | |
129 | ||
130 | ret = config_writer_write_element_unsigned_int(writer, | |
131 | config_element_num_subbuf, | |
132 | attr->num_subbuf); | |
133 | if (ret) { | |
134 | goto end; | |
135 | } | |
136 | ||
137 | ret = config_writer_write_element_unsigned_int(writer, | |
138 | config_element_switch_timer_interval, | |
139 | attr->switch_timer_interval); | |
140 | if (ret) { | |
141 | goto end; | |
142 | } | |
143 | ||
144 | ret = config_writer_write_element_unsigned_int(writer, | |
145 | config_element_read_timer_interval, | |
146 | attr->read_timer_interval); | |
147 | if (ret) { | |
148 | goto end; | |
149 | } | |
150 | ||
151 | ret = config_writer_write_element_string(writer, | |
152 | config_element_output_type, | |
153 | attr->output == LTTNG_UST_MMAP ? | |
154 | config_output_type_mmap : config_output_type_splice); | |
155 | if (ret) { | |
156 | goto end; | |
157 | } | |
158 | end: | |
159 | return ret ? LTTNG_ERR_SAVE_IO_FAIL : 0; | |
160 | } | |
161 | ||
162 | static | |
163 | const char *get_kernel_instrumentation_string( | |
164 | enum lttng_kernel_instrumentation instrumentation) | |
165 | { | |
166 | const char *instrumentation_string; | |
167 | ||
168 | switch (instrumentation) { | |
169 | case LTTNG_KERNEL_ALL: | |
170 | instrumentation_string = config_event_type_all; | |
171 | break; | |
172 | case LTTNG_KERNEL_TRACEPOINT: | |
173 | instrumentation_string = config_event_type_tracepoint; | |
174 | break; | |
175 | case LTTNG_KERNEL_KPROBE: | |
176 | instrumentation_string = config_event_type_kprobe; | |
177 | break; | |
178 | case LTTNG_KERNEL_FUNCTION: | |
179 | instrumentation_string = config_event_type_function; | |
180 | break; | |
181 | case LTTNG_KERNEL_KRETPROBE: | |
182 | instrumentation_string = config_event_type_kretprobe; | |
183 | break; | |
184 | case LTTNG_KERNEL_NOOP: | |
185 | instrumentation_string = config_event_type_noop; | |
186 | break; | |
187 | case LTTNG_KERNEL_SYSCALL: | |
188 | instrumentation_string = config_event_type_syscall; | |
189 | break; | |
190 | default: | |
191 | instrumentation_string = NULL; | |
192 | } | |
193 | ||
194 | return instrumentation_string; | |
195 | } | |
196 | ||
197 | static | |
198 | const char *get_kernel_context_type_string( | |
199 | enum lttng_kernel_context_type context_type) | |
200 | { | |
201 | const char *context_type_string; | |
202 | ||
203 | switch (context_type) { | |
204 | case LTTNG_KERNEL_CONTEXT_PID: | |
205 | context_type_string = config_event_context_pid; | |
206 | break; | |
207 | case LTTNG_KERNEL_CONTEXT_PROCNAME: | |
208 | context_type_string = config_event_context_procname; | |
209 | break; | |
210 | case LTTNG_KERNEL_CONTEXT_PRIO: | |
211 | context_type_string = config_event_context_prio; | |
212 | break; | |
213 | case LTTNG_KERNEL_CONTEXT_NICE: | |
214 | context_type_string = config_event_context_nice; | |
215 | break; | |
216 | case LTTNG_KERNEL_CONTEXT_VPID: | |
217 | context_type_string = config_event_context_vpid; | |
218 | break; | |
219 | case LTTNG_KERNEL_CONTEXT_TID: | |
220 | context_type_string = config_event_context_tid; | |
221 | break; | |
222 | case LTTNG_KERNEL_CONTEXT_VTID: | |
223 | context_type_string = config_event_context_vtid; | |
224 | break; | |
225 | case LTTNG_KERNEL_CONTEXT_PPID: | |
226 | context_type_string = config_event_context_ppid; | |
227 | break; | |
228 | case LTTNG_KERNEL_CONTEXT_VPPID: | |
229 | context_type_string = config_event_context_vppid; | |
230 | break; | |
231 | case LTTNG_KERNEL_CONTEXT_HOSTNAME: | |
232 | context_type_string = config_event_context_hostname; | |
233 | break; | |
234 | default: | |
235 | context_type_string = NULL; | |
236 | } | |
237 | ||
238 | return context_type_string; | |
239 | } | |
240 | ||
241 | static | |
242 | const char *get_ust_context_type_string( | |
243 | enum lttng_ust_context_type context_type) | |
244 | { | |
245 | const char *context_type_string; | |
246 | ||
247 | switch (context_type) { | |
248 | case LTTNG_UST_CONTEXT_PROCNAME: | |
249 | context_type_string = config_event_context_procname; | |
250 | break; | |
251 | case LTTNG_UST_CONTEXT_VPID: | |
252 | context_type_string = config_event_context_vpid; | |
253 | break; | |
254 | case LTTNG_UST_CONTEXT_VTID: | |
255 | context_type_string = config_event_context_vtid; | |
256 | break; | |
257 | case LTTNG_UST_CONTEXT_IP: | |
258 | context_type_string = config_event_context_ip; | |
259 | break; | |
260 | case LTTNG_UST_CONTEXT_PTHREAD_ID: | |
261 | context_type_string = config_event_context_pthread_id; | |
262 | break; | |
e885a367 | 263 | case LTTNG_UST_CONTEXT_PERF_THREAD_COUNTER: |
14ce5bd8 JG |
264 | /* |
265 | * Error, should not be stored in the XML, perf contexts | |
266 | * are stored as a node of type event_perf_context_type. | |
267 | */ | |
fb198a11 JG |
268 | default: |
269 | context_type_string = NULL; | |
e885a367 | 270 | break; |
fb198a11 JG |
271 | } |
272 | ||
273 | return context_type_string; | |
274 | } | |
275 | ||
276 | static | |
277 | const char *get_buffer_type_string( | |
278 | enum lttng_buffer_type buffer_type) | |
279 | { | |
280 | const char *buffer_type_string; | |
281 | ||
282 | switch (buffer_type) { | |
283 | case LTTNG_BUFFER_PER_PID: | |
284 | buffer_type_string = config_buffer_type_per_pid; | |
285 | break; | |
286 | case LTTNG_BUFFER_PER_UID: | |
287 | buffer_type_string = config_buffer_type_per_uid; | |
288 | break; | |
289 | case LTTNG_BUFFER_GLOBAL: | |
290 | buffer_type_string = config_buffer_type_global; | |
291 | break; | |
292 | default: | |
293 | buffer_type_string = NULL; | |
294 | } | |
295 | ||
296 | return buffer_type_string; | |
297 | } | |
298 | ||
299 | static | |
300 | const char *get_loglevel_type_string( | |
301 | enum lttng_ust_loglevel_type loglevel_type) | |
302 | { | |
303 | const char *loglevel_type_string; | |
304 | ||
305 | switch (loglevel_type) { | |
306 | case LTTNG_UST_LOGLEVEL_ALL: | |
307 | loglevel_type_string = config_loglevel_type_all; | |
308 | break; | |
309 | case LTTNG_UST_LOGLEVEL_RANGE: | |
310 | loglevel_type_string = config_loglevel_type_range; | |
311 | break; | |
312 | case LTTNG_UST_LOGLEVEL_SINGLE: | |
313 | loglevel_type_string = config_loglevel_type_single; | |
314 | break; | |
315 | default: | |
316 | loglevel_type_string = NULL; | |
317 | } | |
318 | ||
319 | return loglevel_type_string; | |
320 | } | |
321 | ||
322 | static | |
323 | int save_kernel_event(struct config_writer *writer, | |
324 | struct ltt_kernel_event *event) | |
325 | { | |
326 | int ret; | |
327 | const char *instrumentation_type; | |
328 | ||
329 | ret = config_writer_open_element(writer, config_element_event); | |
330 | if (ret) { | |
331 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
332 | goto end; | |
333 | } | |
334 | ||
335 | if (event->event->name[0]) { | |
336 | ret = config_writer_write_element_string(writer, | |
337 | config_element_name, event->event->name); | |
338 | if (ret) { | |
339 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
340 | goto end; | |
341 | } | |
342 | } | |
343 | ||
344 | ret = config_writer_write_element_bool(writer, config_element_enabled, | |
345 | event->enabled); | |
346 | if (ret) { | |
347 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
348 | goto end; | |
349 | } | |
350 | ||
351 | instrumentation_type = get_kernel_instrumentation_string( | |
352 | event->event->instrumentation); | |
353 | if (!instrumentation_type) { | |
354 | ret = LTTNG_ERR_INVALID; | |
355 | goto end; | |
356 | } | |
357 | ||
358 | ret = config_writer_write_element_string(writer, config_element_type, | |
359 | instrumentation_type); | |
360 | if (ret) { | |
361 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
362 | goto end; | |
363 | } | |
364 | ||
365 | if (event->event->instrumentation == LTTNG_KERNEL_FUNCTION || | |
366 | event->event->instrumentation == LTTNG_KERNEL_KPROBE || | |
367 | event->event->instrumentation == LTTNG_KERNEL_KRETPROBE) { | |
368 | ||
369 | ret = config_writer_open_element(writer, | |
370 | config_element_attributes); | |
371 | if (ret) { | |
372 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
373 | goto end; | |
374 | } | |
375 | ||
376 | switch (event->event->instrumentation) { | |
0de3eda1 | 377 | case LTTNG_KERNEL_SYSCALL: |
fb198a11 JG |
378 | case LTTNG_KERNEL_FUNCTION: |
379 | ret = config_writer_open_element(writer, | |
380 | config_element_function_attributes); | |
381 | if (ret) { | |
382 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
383 | goto end; | |
384 | } | |
385 | ||
386 | ret = config_writer_write_element_string(writer, | |
387 | config_element_name, | |
388 | event->event->u.ftrace.symbol_name); | |
389 | if (ret) { | |
390 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
391 | goto end; | |
392 | } | |
393 | ||
394 | /* /function attributes */ | |
395 | ret = config_writer_close_element(writer); | |
396 | if (ret) { | |
397 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
398 | goto end; | |
399 | } | |
400 | break; | |
401 | case LTTNG_KERNEL_KPROBE: | |
402 | case LTTNG_KERNEL_KRETPROBE: | |
403 | { | |
404 | const char *symbol_name; | |
405 | uint64_t addr; | |
406 | uint64_t offset; | |
407 | ||
408 | if (event->event->instrumentation == | |
409 | LTTNG_KERNEL_KPROBE) { | |
410 | /* | |
411 | * Comments in lttng-kernel.h mention that | |
412 | * either addr or symbol_name are set, not both. | |
413 | */ | |
414 | addr = event->event->u.kprobe.addr; | |
415 | offset = event->event->u.kprobe.offset; | |
416 | symbol_name = addr ? NULL : | |
417 | event->event->u.kprobe.symbol_name; | |
418 | } else { | |
419 | symbol_name = | |
420 | event->event->u.kretprobe.symbol_name; | |
421 | addr = event->event->u.kretprobe.addr; | |
422 | offset = event->event->u.kretprobe.offset; | |
423 | } | |
424 | ||
425 | ret = config_writer_open_element(writer, | |
426 | config_element_probe_attributes); | |
427 | if (ret) { | |
428 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
429 | goto end; | |
430 | } | |
431 | ||
432 | if (symbol_name) { | |
433 | ret = config_writer_write_element_string(writer, | |
434 | config_element_symbol_name, | |
435 | symbol_name); | |
436 | if (ret) { | |
437 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
438 | goto end; | |
439 | } | |
440 | } | |
441 | ||
442 | if (addr) { | |
443 | ret = config_writer_write_element_unsigned_int( | |
444 | writer, config_element_address, addr); | |
445 | if (ret) { | |
446 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
447 | goto end; | |
448 | } | |
449 | } | |
450 | ||
451 | if (offset) { | |
452 | ret = config_writer_write_element_unsigned_int( | |
453 | writer, config_element_offset, offset); | |
454 | if (ret) { | |
455 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
456 | goto end; | |
457 | } | |
458 | } | |
459 | ||
460 | ret = config_writer_close_element(writer); | |
461 | if (ret) { | |
462 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
463 | goto end; | |
464 | } | |
465 | break; | |
466 | } | |
467 | default: | |
468 | ERR("Unsupported kernel instrumentation type."); | |
469 | ret = LTTNG_ERR_INVALID; | |
470 | goto end; | |
471 | } | |
472 | ||
473 | /* /attributes */ | |
474 | ret = config_writer_close_element(writer); | |
475 | if (ret) { | |
476 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
477 | goto end; | |
478 | } | |
479 | } | |
480 | ||
481 | /* /event */ | |
482 | ret = config_writer_close_element(writer); | |
483 | if (ret) { | |
484 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
485 | goto end; | |
486 | } | |
487 | end: | |
488 | return ret; | |
489 | } | |
490 | ||
0de3eda1 DG |
491 | static |
492 | int save_kernel_syscall(struct config_writer *writer, | |
493 | struct ltt_kernel_channel *kchan) | |
494 | { | |
495 | int ret, i; | |
496 | ssize_t count; | |
497 | struct lttng_event *events = NULL; | |
498 | ||
499 | assert(writer); | |
500 | assert(kchan); | |
501 | ||
502 | count = syscall_list_channel(kchan, &events, 0); | |
503 | if (!count) { | |
504 | /* No syscalls, just gracefully return. */ | |
505 | ret = 0; | |
506 | goto end; | |
507 | } | |
508 | ||
509 | for (i = 0; i < count; i++) { | |
510 | struct ltt_kernel_event *kevent; | |
511 | ||
512 | /* Create a temporary kevent in order to save it. */ | |
00a62084 MD |
513 | /* |
514 | * TODO: struct lttng_event does not really work for a filter, | |
515 | * but unfortunately, it is exposed as external API (and used as | |
516 | * internal representation. Using NULL meanwhile. | |
517 | */ | |
518 | kevent = trace_kernel_create_event(&events[i], | |
519 | NULL, NULL); | |
0de3eda1 DG |
520 | if (!kevent) { |
521 | ret = -ENOMEM; | |
522 | goto end; | |
523 | } | |
524 | /* Init list in order so the destroy call can del the node. */ | |
525 | CDS_INIT_LIST_HEAD(&kevent->list); | |
526 | ||
527 | ret = save_kernel_event(writer, kevent); | |
528 | trace_kernel_destroy_event(kevent); | |
529 | if (ret) { | |
530 | goto end; | |
531 | } | |
532 | } | |
533 | ||
534 | /* Everything went well */ | |
535 | ret = 0; | |
536 | ||
537 | end: | |
538 | free(events); | |
539 | return ret; | |
540 | } | |
541 | ||
fb198a11 JG |
542 | static |
543 | int save_kernel_events(struct config_writer *writer, | |
0de3eda1 | 544 | struct ltt_kernel_channel *kchan) |
fb198a11 JG |
545 | { |
546 | int ret; | |
547 | struct ltt_kernel_event *event; | |
548 | ||
549 | ret = config_writer_open_element(writer, config_element_events); | |
550 | if (ret) { | |
551 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
552 | goto end; | |
553 | } | |
554 | ||
0de3eda1 | 555 | cds_list_for_each_entry(event, &kchan->events_list.head, list) { |
fb198a11 JG |
556 | ret = save_kernel_event(writer, event); |
557 | if (ret) { | |
558 | goto end; | |
559 | } | |
560 | } | |
561 | ||
0de3eda1 DG |
562 | /* Save syscalls if any. */ |
563 | ret = save_kernel_syscall(writer, kchan); | |
564 | if (ret) { | |
565 | goto end; | |
566 | } | |
567 | ||
fb198a11 JG |
568 | /* /events */ |
569 | ret = config_writer_close_element(writer); | |
570 | if (ret) { | |
571 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
572 | goto end; | |
573 | } | |
574 | end: | |
575 | return ret; | |
576 | } | |
577 | ||
578 | static | |
579 | int save_ust_event(struct config_writer *writer, | |
580 | struct ltt_ust_event *event) | |
581 | { | |
582 | int ret; | |
583 | const char *loglevel_type_string; | |
584 | ||
585 | ret = config_writer_open_element(writer, config_element_event); | |
586 | if (ret) { | |
587 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
588 | goto end; | |
589 | } | |
590 | ||
591 | if (event->attr.name[0]) { | |
592 | ret = config_writer_write_element_string(writer, | |
593 | config_element_name, event->attr.name); | |
594 | if (ret) { | |
595 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
596 | goto end; | |
597 | } | |
598 | } | |
599 | ||
600 | ret = config_writer_write_element_bool(writer, config_element_enabled, | |
601 | event->enabled); | |
602 | if (ret) { | |
603 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
604 | goto end; | |
605 | } | |
606 | ||
607 | if (event->attr.instrumentation != LTTNG_UST_TRACEPOINT) { | |
608 | ERR("Unsupported UST instrumentation type."); | |
609 | ret = LTTNG_ERR_INVALID; | |
610 | goto end; | |
611 | } | |
612 | ret = config_writer_write_element_string(writer, config_element_type, | |
613 | config_event_type_tracepoint); | |
614 | if (ret) { | |
615 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
616 | goto end; | |
617 | } | |
618 | ||
619 | loglevel_type_string = get_loglevel_type_string( | |
620 | event->attr.loglevel_type); | |
621 | if (!loglevel_type_string) { | |
622 | ERR("Unsupported UST loglevel type."); | |
623 | ret = LTTNG_ERR_INVALID; | |
624 | goto end; | |
625 | } | |
626 | ||
627 | ret = config_writer_write_element_string(writer, | |
628 | config_element_loglevel_type, loglevel_type_string); | |
629 | if (ret) { | |
630 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
631 | goto end; | |
632 | } | |
633 | ||
634 | ret = config_writer_write_element_signed_int(writer, | |
635 | config_element_loglevel, event->attr.loglevel); | |
636 | if (ret) { | |
637 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
638 | goto end; | |
639 | } | |
640 | ||
641 | if (event->filter_expression) { | |
642 | ret = config_writer_write_element_string(writer, | |
643 | config_element_filter, event->filter_expression); | |
644 | if (ret) { | |
645 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
646 | goto end; | |
647 | } | |
648 | } | |
649 | ||
650 | if (event->exclusion && event->exclusion->count) { | |
651 | uint32_t i; | |
652 | ||
653 | ret = config_writer_open_element(writer, | |
654 | config_element_exclusions); | |
655 | if (ret) { | |
656 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
657 | goto end; | |
658 | } | |
659 | ||
660 | for (i = 0; i < event->exclusion->count; i++) { | |
661 | ret = config_writer_write_element_string(writer, | |
662 | config_element_exclusion, | |
663 | &event->exclusion->names[0][i]); | |
664 | if (ret) { | |
665 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
666 | goto end; | |
667 | } | |
668 | } | |
669 | ||
670 | /* /exclusions */ | |
671 | ret = config_writer_close_element(writer); | |
672 | if (ret) { | |
673 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
674 | goto end; | |
675 | } | |
676 | } | |
677 | ||
678 | /* /event */ | |
679 | ret = config_writer_close_element(writer); | |
680 | if (ret) { | |
681 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
682 | goto end; | |
683 | } | |
684 | end: | |
685 | return ret; | |
686 | } | |
687 | ||
688 | static | |
689 | int save_ust_events(struct config_writer *writer, | |
690 | struct lttng_ht *events) | |
691 | { | |
692 | int ret; | |
693 | struct ltt_ust_event *event; | |
694 | struct lttng_ht_node_str *node; | |
695 | struct lttng_ht_iter iter; | |
696 | ||
697 | ret = config_writer_open_element(writer, config_element_events); | |
698 | if (ret) { | |
699 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
700 | goto end; | |
701 | } | |
702 | ||
703 | rcu_read_lock(); | |
704 | cds_lfht_for_each_entry(events->ht, &iter.iter, node, node) { | |
705 | event = caa_container_of(node, struct ltt_ust_event, node); | |
706 | ||
707 | ret = save_ust_event(writer, event); | |
708 | if (ret) { | |
709 | rcu_read_unlock(); | |
710 | goto end; | |
711 | } | |
712 | } | |
713 | rcu_read_unlock(); | |
714 | ||
715 | /* /events */ | |
716 | ret = config_writer_close_element(writer); | |
717 | if (ret) { | |
718 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
719 | goto end; | |
720 | } | |
721 | end: | |
722 | return ret; | |
723 | } | |
724 | ||
ccf10263 MD |
725 | /* TODO: save/restore tracker pid */ |
726 | ||
fb198a11 JG |
727 | static |
728 | int save_kernel_context(struct config_writer *writer, | |
729 | struct lttng_kernel_context *ctx) | |
730 | { | |
731 | int ret = 0; | |
732 | ||
733 | if (!ctx) { | |
734 | goto end; | |
735 | } | |
736 | ||
fb198a11 JG |
737 | ret = config_writer_open_element(writer, config_element_context); |
738 | if (ret) { | |
739 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
740 | goto end; | |
741 | } | |
742 | ||
cba45eda | 743 | if (ctx->ctx == LTTNG_KERNEL_CONTEXT_PERF_CPU_COUNTER) { |
fb198a11 JG |
744 | ret = config_writer_open_element(writer, config_element_perf); |
745 | if (ret) { | |
746 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
747 | goto end; | |
748 | } | |
749 | ||
750 | ret = config_writer_write_element_unsigned_int(writer, | |
751 | config_element_type, ctx->u.perf_counter.type); | |
752 | if (ret) { | |
753 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
754 | goto end; | |
755 | } | |
756 | ||
757 | ret = config_writer_write_element_unsigned_int(writer, | |
758 | config_element_config, ctx->u.perf_counter.config); | |
759 | if (ret) { | |
760 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
761 | goto end; | |
762 | } | |
763 | ||
764 | ret = config_writer_write_element_string(writer, | |
765 | config_element_name, ctx->u.perf_counter.name); | |
766 | if (ret) { | |
767 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
768 | goto end; | |
769 | } | |
770 | ||
771 | /* /perf */ | |
772 | ret = config_writer_close_element(writer); | |
773 | if (ret) { | |
774 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
775 | goto end; | |
776 | } | |
777 | } else { | |
778 | const char *context_type_string = | |
779 | get_kernel_context_type_string(ctx->ctx); | |
780 | ||
781 | if (!context_type_string) { | |
782 | ERR("Unsupported kernel context type."); | |
783 | ret = LTTNG_ERR_INVALID; | |
784 | goto end; | |
785 | } | |
786 | ||
787 | ret = config_writer_write_element_string(writer, | |
788 | config_element_type, context_type_string); | |
789 | if (ret) { | |
790 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
791 | goto end; | |
792 | } | |
793 | } | |
794 | ||
795 | /* /context */ | |
796 | ret = config_writer_close_element(writer); | |
797 | if (ret) { | |
798 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
799 | goto end; | |
800 | } | |
801 | ||
645328ae DG |
802 | end: |
803 | return ret; | |
804 | } | |
805 | ||
806 | static | |
807 | int save_kernel_contexts(struct config_writer *writer, | |
808 | struct ltt_kernel_channel *kchan) | |
809 | { | |
810 | int ret; | |
811 | struct ltt_kernel_context *ctx; | |
812 | ||
2aa64052 JG |
813 | if (cds_list_empty(&kchan->ctx_list)) { |
814 | ret = 0; | |
815 | goto end; | |
816 | } | |
817 | ||
645328ae DG |
818 | ret = config_writer_open_element(writer, config_element_contexts); |
819 | if (ret) { | |
820 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
821 | goto end; | |
822 | } | |
823 | ||
824 | cds_list_for_each_entry(ctx, &kchan->ctx_list, list) { | |
825 | ret = save_kernel_context(writer, &ctx->ctx); | |
826 | if (ret) { | |
827 | goto end; | |
828 | } | |
829 | } | |
830 | ||
fb198a11 JG |
831 | /* /contexts */ |
832 | ret = config_writer_close_element(writer); | |
833 | if (ret) { | |
834 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
835 | goto end; | |
836 | } | |
837 | end: | |
838 | return ret; | |
839 | } | |
840 | ||
841 | static | |
842 | int save_ust_context(struct config_writer *writer, | |
843 | struct cds_list_head *ctx_list) | |
844 | { | |
845 | int ret; | |
846 | struct ltt_ust_context *ctx; | |
847 | ||
848 | assert(writer); | |
849 | assert(ctx_list); | |
850 | ||
851 | ret = config_writer_open_element(writer, config_element_contexts); | |
852 | if (ret) { | |
853 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
854 | goto end; | |
855 | } | |
856 | ||
857 | cds_list_for_each_entry(ctx, ctx_list, list) { | |
858 | const char *context_type_string; | |
859 | ||
fb198a11 JG |
860 | |
861 | ret = config_writer_open_element(writer, | |
862 | config_element_context); | |
863 | if (ret) { | |
864 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
865 | goto end; | |
866 | } | |
867 | ||
14ce5bd8 JG |
868 | if (ctx->ctx.ctx == LTTNG_UST_CONTEXT_PERF_THREAD_COUNTER) { |
869 | /* Perf contexts are saved as event_perf_context_type */ | |
870 | ret = config_writer_open_element(writer, | |
871 | config_element_perf); | |
872 | if (ret) { | |
873 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
874 | goto end; | |
875 | } | |
876 | ||
877 | ret = config_writer_write_element_unsigned_int(writer, | |
878 | config_element_type, | |
879 | ctx->ctx.u.perf_counter.type); | |
880 | if (ret) { | |
881 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
882 | goto end; | |
883 | } | |
884 | ||
885 | ret = config_writer_write_element_unsigned_int(writer, | |
886 | config_element_config, | |
887 | ctx->ctx.u.perf_counter.config); | |
888 | if (ret) { | |
889 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
890 | goto end; | |
891 | } | |
892 | ||
893 | ret = config_writer_write_element_string(writer, | |
894 | config_element_name, | |
895 | ctx->ctx.u.perf_counter.name); | |
896 | if (ret) { | |
897 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
898 | goto end; | |
899 | } | |
900 | ||
901 | /* /perf */ | |
902 | ret = config_writer_close_element(writer); | |
903 | if (ret) { | |
904 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
905 | goto end; | |
906 | } | |
907 | } else { | |
908 | /* Save context as event_context_type_type */ | |
909 | context_type_string = get_ust_context_type_string( | |
910 | ctx->ctx.ctx); | |
911 | if (!context_type_string) { | |
912 | ERR("Unsupported UST context type.") | |
913 | ret = LTTNG_ERR_INVALID; | |
914 | goto end; | |
915 | } | |
916 | ||
917 | ret = config_writer_write_element_string(writer, | |
918 | config_element_type, context_type_string); | |
919 | if (ret) { | |
920 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
921 | goto end; | |
922 | } | |
fb198a11 JG |
923 | } |
924 | ||
925 | /* /context */ | |
926 | ret = config_writer_close_element(writer); | |
927 | if (ret) { | |
928 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
929 | goto end; | |
930 | } | |
931 | } | |
932 | ||
933 | /* /contexts */ | |
934 | ret = config_writer_close_element(writer); | |
935 | if (ret) { | |
936 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
937 | goto end; | |
938 | } | |
939 | end: | |
940 | return ret; | |
941 | } | |
942 | ||
943 | static | |
944 | int save_kernel_channel(struct config_writer *writer, | |
945 | struct ltt_kernel_channel *kchan) | |
946 | { | |
947 | int ret; | |
948 | ||
949 | assert(writer); | |
950 | assert(kchan); | |
951 | ||
952 | ret = config_writer_open_element(writer, config_element_channel); | |
953 | if (ret) { | |
954 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
955 | goto end; | |
956 | } | |
957 | ||
958 | ret = config_writer_write_element_string(writer, config_element_name, | |
959 | kchan->channel->name); | |
960 | if (ret) { | |
961 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
962 | goto end; | |
963 | } | |
964 | ||
965 | ret = config_writer_write_element_bool(writer, config_element_enabled, | |
966 | kchan->channel->enabled); | |
967 | if (ret) { | |
968 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
969 | goto end; | |
970 | } | |
971 | ||
972 | ret = save_kernel_channel_attributes(writer, &kchan->channel->attr); | |
973 | if (ret) { | |
974 | goto end; | |
975 | } | |
976 | ||
0de3eda1 | 977 | ret = save_kernel_events(writer, kchan); |
fb198a11 JG |
978 | if (ret) { |
979 | goto end; | |
980 | } | |
981 | ||
645328ae | 982 | ret = save_kernel_contexts(writer, kchan); |
fb198a11 JG |
983 | if (ret) { |
984 | goto end; | |
985 | } | |
986 | ||
987 | /* /channel */ | |
988 | ret = config_writer_close_element(writer); | |
989 | if (ret) { | |
990 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
991 | goto end; | |
992 | } | |
993 | end: | |
994 | return ret; | |
995 | } | |
996 | ||
997 | static | |
998 | int save_ust_channel(struct config_writer *writer, | |
999 | struct ltt_ust_channel *ust_chan, | |
1000 | struct ltt_ust_session *session) | |
1001 | { | |
1002 | int ret; | |
1003 | ||
1004 | assert(writer); | |
1005 | assert(ust_chan); | |
1006 | assert(session); | |
1007 | ||
1008 | ret = config_writer_open_element(writer, config_element_channel); | |
1009 | if (ret) { | |
1010 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1011 | goto end; | |
1012 | } | |
1013 | ||
1014 | ret = config_writer_write_element_string(writer, config_element_name, | |
1015 | ust_chan->name); | |
1016 | if (ret) { | |
1017 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1018 | goto end; | |
1019 | } | |
1020 | ||
1021 | ret = config_writer_write_element_bool(writer, config_element_enabled, | |
1022 | ust_chan->enabled); | |
1023 | if (ret) { | |
1024 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1025 | goto end; | |
1026 | } | |
1027 | ||
1028 | ret = save_ust_channel_attributes(writer, &ust_chan->attr); | |
1029 | if (ret) { | |
1030 | goto end; | |
1031 | } | |
1032 | ||
1033 | ret = config_writer_write_element_unsigned_int(writer, | |
1034 | config_element_tracefile_size, ust_chan->tracefile_size); | |
1035 | if (ret) { | |
1036 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1037 | goto end; | |
1038 | } | |
1039 | ||
1040 | ret = config_writer_write_element_unsigned_int(writer, | |
1041 | config_element_tracefile_count, ust_chan->tracefile_count); | |
1042 | if (ret) { | |
1043 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1044 | goto end; | |
1045 | } | |
1046 | ||
1047 | ret = config_writer_write_element_unsigned_int(writer, | |
1048 | config_element_live_timer_interval, | |
1049 | session->live_timer_interval); | |
1050 | if (ret) { | |
1051 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1052 | goto end; | |
1053 | } | |
1054 | ||
1055 | ret = save_ust_events(writer, ust_chan->events); | |
1056 | if (ret) { | |
1057 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1058 | goto end; | |
1059 | } | |
1060 | ||
1061 | ret = save_ust_context(writer, &ust_chan->ctx_list); | |
1062 | if (ret) { | |
1063 | goto end; | |
1064 | } | |
1065 | ||
1066 | /* /channel */ | |
1067 | ret = config_writer_close_element(writer); | |
1068 | if (ret) { | |
1069 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1070 | goto end; | |
1071 | } | |
1072 | end: | |
1073 | return ret; | |
1074 | } | |
1075 | ||
1076 | static | |
1077 | int save_kernel_session(struct config_writer *writer, | |
1078 | struct ltt_session *session) | |
1079 | { | |
1080 | int ret; | |
1081 | struct ltt_kernel_channel *kchan; | |
1082 | ||
1083 | assert(writer); | |
1084 | assert(session); | |
1085 | ||
1086 | ret = config_writer_write_element_string(writer, config_element_type, | |
1087 | config_domain_type_kernel); | |
1088 | if (ret) { | |
1089 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1090 | goto end; | |
1091 | } | |
1092 | ||
1093 | ret = config_writer_write_element_string(writer, | |
1094 | config_element_buffer_type, config_buffer_type_global); | |
1095 | if (ret) { | |
1096 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1097 | goto end; | |
1098 | } | |
1099 | ||
1100 | ret = config_writer_open_element(writer, | |
1101 | config_element_channels); | |
1102 | if (ret) { | |
1103 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1104 | goto end; | |
1105 | } | |
1106 | ||
1107 | cds_list_for_each_entry(kchan, &session->kernel_session->channel_list.head, | |
1108 | list) { | |
1109 | ret = save_kernel_channel(writer, kchan); | |
1110 | if (ret) { | |
1111 | goto end; | |
1112 | } | |
1113 | } | |
1114 | ||
1115 | /* /channels */ | |
1116 | ret = config_writer_close_element(writer); | |
1117 | if (ret) { | |
1118 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1119 | goto end; | |
1120 | } | |
1121 | end: | |
1122 | return ret; | |
1123 | } | |
1124 | ||
1125 | static | |
1126 | int save_ust_session(struct config_writer *writer, | |
022d91ba | 1127 | struct ltt_session *session, int save_agent) |
fb198a11 JG |
1128 | { |
1129 | int ret; | |
1130 | struct ltt_ust_channel *ust_chan; | |
1131 | const char *buffer_type_string; | |
1132 | struct lttng_ht_node_str *node; | |
1133 | struct lttng_ht_iter iter; | |
1134 | ||
1135 | assert(writer); | |
1136 | assert(session); | |
1137 | ||
1138 | ret = config_writer_write_element_string(writer, config_element_type, | |
022d91ba | 1139 | save_agent ? config_domain_type_jul : config_domain_type_ust); |
fb198a11 JG |
1140 | if (ret) { |
1141 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1142 | goto end; | |
1143 | } | |
1144 | ||
1145 | buffer_type_string = get_buffer_type_string( | |
1146 | session->ust_session->buffer_type); | |
1147 | if (!buffer_type_string) { | |
1148 | ERR("Unsupported buffer type."); | |
1149 | ret = LTTNG_ERR_INVALID; | |
1150 | goto end; | |
1151 | } | |
1152 | ||
1153 | ret = config_writer_write_element_string(writer, | |
1154 | config_element_buffer_type, buffer_type_string); | |
1155 | if (ret) { | |
1156 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1157 | goto end; | |
1158 | } | |
1159 | ||
1160 | ret = config_writer_open_element(writer, config_element_channels); | |
1161 | if (ret) { | |
1162 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1163 | goto end; | |
1164 | } | |
1165 | ||
1166 | rcu_read_lock(); | |
1167 | cds_lfht_for_each_entry(session->ust_session->domain_global.channels->ht, | |
1168 | &iter.iter, node, node) { | |
022d91ba | 1169 | int agent_channel; |
fb198a11 JG |
1170 | |
1171 | ust_chan = caa_container_of(node, struct ltt_ust_channel, node); | |
da6c3a50 | 1172 | agent_channel = !strcmp(DEFAULT_JUL_CHANNEL_NAME, ust_chan->name) || |
0e115563 DG |
1173 | !strcmp(DEFAULT_LOG4J_CHANNEL_NAME, ust_chan->name) || |
1174 | !strcmp(DEFAULT_PYTHON_CHANNEL_NAME, ust_chan->name); | |
022d91ba | 1175 | if (!(save_agent ^ agent_channel)) { |
fb198a11 JG |
1176 | ret = save_ust_channel(writer, ust_chan, session->ust_session); |
1177 | if (ret) { | |
1178 | rcu_read_unlock(); | |
1179 | goto end; | |
1180 | } | |
1181 | } | |
1182 | } | |
1183 | rcu_read_unlock(); | |
1184 | ||
1185 | /* /channels */ | |
1186 | ret = config_writer_close_element(writer); | |
1187 | if (ret) { | |
1188 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1189 | goto end; | |
1190 | } | |
1191 | end: | |
1192 | return ret; | |
1193 | } | |
1194 | ||
1195 | static | |
1196 | int save_domains(struct config_writer *writer, struct ltt_session *session) | |
1197 | { | |
1198 | int ret = 0; | |
1199 | ||
1200 | assert(writer); | |
1201 | assert(session); | |
1202 | ||
1203 | if (!session->kernel_session && !session->ust_session) { | |
1204 | goto end; | |
1205 | } | |
1206 | ||
1207 | ret = config_writer_open_element(writer, config_element_domains); | |
1208 | if (ret) { | |
1209 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1210 | goto end; | |
1211 | } | |
1212 | ||
1213 | ||
1214 | if (session->kernel_session) { | |
1215 | ret = config_writer_open_element(writer, | |
1216 | config_element_domain); | |
1217 | if (ret) { | |
1218 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1219 | goto end; | |
1220 | } | |
1221 | ||
1222 | ret = save_kernel_session(writer, session); | |
1223 | if (ret) { | |
1224 | goto end; | |
1225 | } | |
1226 | ||
1227 | /* /domain */ | |
1228 | ret = config_writer_close_element(writer); | |
1229 | if (ret) { | |
1230 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1231 | goto end; | |
1232 | } | |
1233 | } | |
1234 | ||
1235 | if (session->ust_session) { | |
65d72c41 JG |
1236 | unsigned long agent_count; |
1237 | ||
fb198a11 JG |
1238 | ret = config_writer_open_element(writer, |
1239 | config_element_domain); | |
1240 | if (ret) { | |
1241 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1242 | goto end; | |
1243 | } | |
1244 | ||
1245 | ret = save_ust_session(writer, session, 0); | |
1246 | if (ret) { | |
1247 | goto end; | |
1248 | } | |
1249 | ||
1250 | /* /domain */ | |
1251 | ret = config_writer_close_element(writer); | |
1252 | if (ret) { | |
1253 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1254 | goto end; | |
1255 | } | |
fb198a11 | 1256 | |
65d72c41 JG |
1257 | rcu_read_lock(); |
1258 | agent_count = | |
1259 | lttng_ht_get_count(session->ust_session->agents); | |
1260 | rcu_read_unlock(); | |
fb198a11 | 1261 | |
65d72c41 JG |
1262 | if (agent_count > 0) { |
1263 | ret = config_writer_open_element(writer, | |
1264 | config_element_domain); | |
1265 | if (ret) { | |
1266 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1267 | goto end; | |
1268 | } | |
fb198a11 | 1269 | |
65d72c41 JG |
1270 | ret = save_ust_session(writer, session, 1); |
1271 | if (ret) { | |
1272 | goto end; | |
1273 | } | |
1274 | ||
1275 | /* /domain */ | |
1276 | ret = config_writer_close_element(writer); | |
1277 | if (ret) { | |
1278 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1279 | goto end; | |
1280 | } | |
fb198a11 JG |
1281 | } |
1282 | } | |
1283 | ||
65d72c41 JG |
1284 | if (session->ust_session) { |
1285 | } | |
1286 | ||
fb198a11 JG |
1287 | /* /domains */ |
1288 | ret = config_writer_close_element(writer); | |
1289 | if (ret) { | |
1290 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1291 | goto end; | |
1292 | } | |
1293 | end: | |
1294 | return ret; | |
1295 | } | |
1296 | ||
1297 | static | |
1298 | int save_consumer_output(struct config_writer *writer, | |
1299 | struct consumer_output *output) | |
1300 | { | |
1301 | int ret; | |
1302 | ||
1303 | assert(writer); | |
1304 | assert(output); | |
1305 | ||
1306 | ret = config_writer_open_element(writer, config_element_consumer_output); | |
1307 | if (ret) { | |
1308 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1309 | goto end; | |
1310 | } | |
1311 | ||
1312 | ret = config_writer_write_element_bool(writer, config_element_enabled, | |
1313 | output->enabled); | |
1314 | if (ret) { | |
1315 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1316 | goto end; | |
1317 | } | |
1318 | ||
1319 | ret = config_writer_open_element(writer, config_element_destination); | |
1320 | if (ret) { | |
1321 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1322 | goto end; | |
1323 | } | |
1324 | ||
1325 | switch (output->type) { | |
1326 | case CONSUMER_DST_LOCAL: | |
1327 | ret = config_writer_write_element_string(writer, | |
1328 | config_element_path, output->dst.trace_path); | |
1329 | if (ret) { | |
1330 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1331 | goto end; | |
1332 | } | |
1333 | break; | |
1334 | case CONSUMER_DST_NET: | |
1335 | { | |
1336 | char *uri; | |
1337 | ||
1338 | uri = zmalloc(PATH_MAX); | |
1339 | if (!uri) { | |
1340 | ret = LTTNG_ERR_NOMEM; | |
1341 | goto end; | |
1342 | } | |
1343 | ||
1344 | ret = config_writer_open_element(writer, config_element_net_output); | |
1345 | if (ret) { | |
1346 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1347 | goto end_net_output; | |
1348 | } | |
1349 | ||
1350 | if (output->dst.net.control_isset && | |
1351 | output->dst.net.data_isset) { | |
1352 | ret = uri_to_str_url(&output->dst.net.control, uri, PATH_MAX); | |
1353 | if (ret < 0) { | |
1354 | ret = LTTNG_ERR_INVALID; | |
1355 | goto end_net_output; | |
1356 | } | |
1357 | ||
1358 | ret = config_writer_write_element_string(writer, | |
1359 | config_element_control_uri, uri); | |
1360 | if (ret) { | |
1361 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1362 | goto end_net_output; | |
1363 | } | |
1364 | ||
1365 | ret = uri_to_str_url(&output->dst.net.data, uri, PATH_MAX); | |
1366 | if (ret < 0) { | |
1367 | ret = LTTNG_ERR_INVALID; | |
1368 | goto end_net_output; | |
1369 | } | |
1370 | ||
1371 | ret = config_writer_write_element_string(writer, | |
1372 | config_element_data_uri, uri); | |
1373 | if (ret) { | |
1374 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1375 | goto end_net_output; | |
1376 | } | |
1377 | ||
1378 | end_net_output: | |
1379 | free(uri); | |
1380 | if (ret) { | |
1381 | goto end; | |
1382 | } | |
1383 | } else { | |
1384 | ret = !output->dst.net.control_isset ? | |
1385 | LTTNG_ERR_URL_CTRL_MISS : | |
1386 | LTTNG_ERR_URL_DATA_MISS; | |
c39270e5 | 1387 | free(uri); |
fb198a11 JG |
1388 | goto end; |
1389 | } | |
1390 | ||
1391 | ret = config_writer_close_element(writer); | |
1392 | if (ret) { | |
1393 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1394 | goto end; | |
1395 | } | |
1396 | break; | |
1397 | } | |
1398 | default: | |
1399 | ERR("Unsupported consumer output type."); | |
1400 | ret = LTTNG_ERR_INVALID; | |
1401 | goto end; | |
1402 | } | |
1403 | ||
1404 | /* /destination */ | |
1405 | ret = config_writer_close_element(writer); | |
1406 | if (ret) { | |
1407 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1408 | goto end; | |
1409 | } | |
1410 | ||
1411 | /* /consumer_output */ | |
1412 | ret = config_writer_close_element(writer); | |
1413 | if (ret) { | |
1414 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1415 | goto end; | |
1416 | } | |
1417 | end: | |
1418 | return ret; | |
1419 | } | |
1420 | ||
1421 | static | |
1422 | int save_snapshot_outputs(struct config_writer *writer, | |
1423 | struct snapshot *snapshot) | |
1424 | { | |
1425 | int ret; | |
1426 | struct lttng_ht_iter iter; | |
1427 | struct snapshot_output *output; | |
1428 | ||
1429 | assert(writer); | |
1430 | assert(snapshot); | |
1431 | ||
1432 | ret = config_writer_open_element(writer, config_element_snapshot_outputs); | |
1433 | if (ret) { | |
1434 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1435 | goto end; | |
1436 | } | |
1437 | ||
1438 | rcu_read_lock(); | |
1439 | cds_lfht_for_each_entry(snapshot->output_ht->ht, &iter.iter, output, | |
1440 | node.node) { | |
1441 | ret = config_writer_open_element(writer, | |
1442 | config_element_output); | |
1443 | if (ret) { | |
1444 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1445 | goto end_unlock; | |
1446 | } | |
1447 | ||
1448 | ret = config_writer_write_element_string(writer, | |
1449 | config_element_name, output->name); | |
1450 | if (ret) { | |
1451 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1452 | goto end_unlock; | |
1453 | } | |
1454 | ||
1455 | ret = config_writer_write_element_unsigned_int(writer, | |
1456 | config_element_max_size, output->max_size); | |
1457 | if (ret) { | |
1458 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1459 | goto end_unlock; | |
1460 | } | |
1461 | ||
1462 | ret = save_consumer_output(writer, output->consumer); | |
1463 | if (ret) { | |
1464 | goto end_unlock; | |
1465 | } | |
1466 | ||
1467 | /* /output */ | |
1468 | ret = config_writer_close_element(writer); | |
1469 | if (ret) { | |
1470 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1471 | goto end_unlock; | |
1472 | } | |
1473 | } | |
1474 | rcu_read_unlock(); | |
1475 | ||
1476 | /* /snapshot_outputs */ | |
1477 | ret = config_writer_close_element(writer); | |
1478 | if (ret) { | |
1479 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1480 | goto end; | |
1481 | } | |
1482 | ||
1483 | end: | |
1484 | return ret; | |
1485 | end_unlock: | |
1486 | rcu_read_unlock(); | |
1487 | return ret; | |
1488 | } | |
1489 | ||
1490 | static | |
1491 | int save_session_output(struct config_writer *writer, | |
1492 | struct ltt_session *session) | |
1493 | { | |
1494 | int ret; | |
1495 | ||
1496 | assert(writer); | |
1497 | assert(session); | |
1498 | ||
1499 | if ((session->snapshot_mode && session->snapshot.nb_output == 0) || | |
1500 | (!session->snapshot_mode && !session->consumer)) { | |
1501 | /* Session is in no output mode */ | |
1502 | ret = 0; | |
1503 | goto end; | |
1504 | } | |
1505 | ||
1506 | ret = config_writer_open_element(writer, config_element_output); | |
1507 | if (ret) { | |
1508 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1509 | goto end; | |
1510 | } | |
1511 | ||
1512 | if (session->snapshot_mode) { | |
1513 | ret = save_snapshot_outputs(writer, &session->snapshot); | |
1514 | if (ret) { | |
1515 | goto end; | |
1516 | } | |
1517 | } else { | |
1518 | if (session->consumer) { | |
1519 | ret = save_consumer_output(writer, session->consumer); | |
1520 | if (ret) { | |
1521 | goto end; | |
1522 | } | |
1523 | } | |
1524 | } | |
1525 | ||
1526 | /* /output */ | |
1527 | ret = config_writer_close_element(writer); | |
1528 | if (ret) { | |
1529 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1530 | goto end; | |
1531 | } | |
1532 | end: | |
1533 | return ret; | |
1534 | } | |
1535 | ||
1536 | /* | |
1537 | * Save the given session. | |
1538 | * | |
1539 | * Return 0 on success else a LTTNG_ERR* code. | |
1540 | */ | |
1541 | static | |
1542 | int save_session(struct ltt_session *session, | |
1543 | struct lttng_save_session_attr *attr, lttng_sock_cred *creds) | |
1544 | { | |
1545 | int ret, fd; | |
db471218 | 1546 | unsigned int file_opened = 0; /* Indicate if the file has been opened */ |
fb198a11 JG |
1547 | char config_file_path[PATH_MAX]; |
1548 | size_t len; | |
1549 | struct config_writer *writer = NULL; | |
1550 | size_t session_name_len; | |
1551 | const char *provided_path; | |
1552 | ||
1553 | assert(session); | |
1554 | assert(attr); | |
1555 | assert(creds); | |
1556 | ||
1557 | session_name_len = strlen(session->name); | |
95a29ab8 | 1558 | memset(config_file_path, 0, sizeof(config_file_path)); |
fb198a11 JG |
1559 | |
1560 | if (!session_access_ok(session, | |
1561 | LTTNG_SOCK_GET_UID_CRED(creds), | |
1562 | LTTNG_SOCK_GET_GID_CRED(creds))) { | |
1563 | ret = LTTNG_ERR_EPERM; | |
1564 | goto end; | |
1565 | } | |
1566 | ||
1567 | provided_path = lttng_save_session_attr_get_output_url(attr); | |
1568 | if (provided_path) { | |
95a29ab8 | 1569 | DBG3("Save session in provided path %s", provided_path); |
fb198a11 | 1570 | len = strlen(provided_path); |
d2992717 | 1571 | if (len >= sizeof(config_file_path)) { |
fb198a11 JG |
1572 | ret = LTTNG_ERR_SET_URL; |
1573 | goto end; | |
1574 | } | |
1575 | strncpy(config_file_path, provided_path, len); | |
1576 | } else { | |
7e078ad1 | 1577 | ssize_t ret_len; |
fb198a11 JG |
1578 | char *home_dir = utils_get_user_home_dir( |
1579 | LTTNG_SOCK_GET_UID_CRED(creds)); | |
1580 | if (!home_dir) { | |
1581 | ret = LTTNG_ERR_SET_URL; | |
1582 | goto end; | |
1583 | } | |
1584 | ||
d2992717 | 1585 | ret_len = snprintf(config_file_path, sizeof(config_file_path), |
fb198a11 JG |
1586 | DEFAULT_SESSION_HOME_CONFIGPATH, home_dir); |
1587 | free(home_dir); | |
7e078ad1 | 1588 | if (ret_len < 0) { |
fb198a11 JG |
1589 | PERROR("snprintf save session"); |
1590 | ret = LTTNG_ERR_SET_URL; | |
1591 | goto end; | |
1592 | } | |
7e078ad1 | 1593 | len = ret_len; |
fb198a11 JG |
1594 | } |
1595 | ||
1596 | /* | |
d2992717 DG |
1597 | * Check the path fits in the config file path dst including the '/' |
1598 | * followed by trailing .lttng extension and the NULL terminated string. | |
fb198a11 | 1599 | */ |
d2992717 DG |
1600 | if ((len + session_name_len + 2 + |
1601 | sizeof(DEFAULT_SESSION_CONFIG_FILE_EXTENSION)) | |
1602 | > sizeof(config_file_path)) { | |
fb198a11 JG |
1603 | ret = LTTNG_ERR_SET_URL; |
1604 | goto end; | |
1605 | } | |
1606 | ||
1607 | ret = run_as_mkdir_recursive(config_file_path, S_IRWXU | S_IRWXG, | |
1608 | LTTNG_SOCK_GET_UID_CRED(creds), LTTNG_SOCK_GET_GID_CRED(creds)); | |
1609 | if (ret) { | |
1610 | ret = LTTNG_ERR_SET_URL; | |
1611 | goto end; | |
1612 | } | |
1613 | ||
d2992717 DG |
1614 | /* |
1615 | * At this point, we know that everything fits in the buffer. Validation | |
1616 | * was done just above. | |
1617 | */ | |
fb198a11 JG |
1618 | config_file_path[len++] = '/'; |
1619 | strncpy(config_file_path + len, session->name, session_name_len); | |
1620 | len += session_name_len; | |
1621 | strcpy(config_file_path + len, DEFAULT_SESSION_CONFIG_FILE_EXTENSION); | |
95a29ab8 DG |
1622 | len += sizeof(DEFAULT_SESSION_CONFIG_FILE_EXTENSION); |
1623 | config_file_path[len] = '\0'; | |
fb198a11 JG |
1624 | |
1625 | if (!access(config_file_path, F_OK) && !attr->overwrite) { | |
f9b57ab2 DG |
1626 | /* File exists, notify the user since the overwrite flag is off. */ |
1627 | ret = LTTNG_ERR_SAVE_FILE_EXIST; | |
fb198a11 JG |
1628 | goto end; |
1629 | } | |
1630 | ||
1631 | fd = run_as_open(config_file_path, O_CREAT | O_WRONLY | O_TRUNC, | |
1632 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP, | |
1633 | LTTNG_SOCK_GET_UID_CRED(creds), LTTNG_SOCK_GET_GID_CRED(creds)); | |
1634 | if (fd < 0) { | |
1635 | PERROR("Could not create configuration file"); | |
1636 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1637 | goto end; | |
1638 | } | |
db471218 | 1639 | file_opened = 1; |
fb198a11 | 1640 | |
705bb62f | 1641 | writer = config_writer_create(fd, 1); |
fb198a11 JG |
1642 | if (!writer) { |
1643 | ret = LTTNG_ERR_NOMEM; | |
1644 | goto end; | |
1645 | } | |
1646 | ||
1647 | ret = config_writer_open_element(writer, config_element_sessions); | |
1648 | if (ret) { | |
1649 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1650 | goto end; | |
1651 | } | |
1652 | ||
1653 | ret = config_writer_open_element(writer, config_element_session); | |
1654 | if (ret) { | |
1655 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1656 | goto end; | |
1657 | } | |
1658 | ||
1659 | ret = config_writer_write_element_string(writer, config_element_name, | |
1660 | session->name); | |
1661 | if (ret) { | |
1662 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1663 | goto end; | |
1664 | } | |
1665 | ||
9e7c9f56 JR |
1666 | if(session->shm_path[0] != '\0') { |
1667 | ret = config_writer_write_element_string(writer, | |
1668 | config_element_shared_memory_path, | |
1669 | session->shm_path); | |
1670 | if (ret) { | |
1671 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1672 | goto end; | |
1673 | } | |
1674 | } | |
1675 | ||
fb198a11 JG |
1676 | ret = save_domains(writer, session); |
1677 | if (ret) { | |
1678 | goto end; | |
1679 | } | |
1680 | ||
1681 | ret = config_writer_write_element_bool(writer, config_element_started, | |
8382cf6f | 1682 | session->active); |
fb198a11 JG |
1683 | if (ret) { |
1684 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1685 | goto end; | |
1686 | } | |
1687 | ||
1688 | if (session->snapshot_mode || session->live_timer) { | |
1689 | ret = config_writer_open_element(writer, config_element_attributes); | |
1690 | if (ret) { | |
1691 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1692 | goto end; | |
1693 | } | |
1694 | ||
1695 | if (session->snapshot_mode) { | |
1696 | ret = config_writer_write_element_bool(writer, | |
1697 | config_element_snapshot_mode, 1); | |
1698 | if (ret) { | |
1699 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1700 | goto end; | |
1701 | } | |
1702 | } else { | |
d98ad589 | 1703 | ret = config_writer_write_element_unsigned_int(writer, |
fb198a11 JG |
1704 | config_element_live_timer_interval, session->live_timer); |
1705 | if (ret) { | |
1706 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1707 | goto end; | |
1708 | } | |
1709 | } | |
1710 | ||
1711 | /* /attributes */ | |
1712 | ret = config_writer_close_element(writer); | |
1713 | if (ret) { | |
1714 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1715 | goto end; | |
1716 | } | |
1717 | } | |
1718 | ||
1719 | ret = save_session_output(writer, session); | |
1720 | if (ret) { | |
1721 | goto end; | |
1722 | } | |
1723 | ||
1724 | /* /session */ | |
1725 | ret = config_writer_close_element(writer); | |
1726 | if (ret) { | |
1727 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1728 | goto end; | |
1729 | } | |
1730 | ||
1731 | /* /sessions */ | |
1732 | ret = config_writer_close_element(writer); | |
1733 | if (ret) { | |
1734 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1735 | goto end; | |
1736 | } | |
1737 | end: | |
1738 | if (writer && config_writer_destroy(writer)) { | |
1739 | /* Preserve the original error code */ | |
1740 | ret = ret ? ret : LTTNG_ERR_SAVE_IO_FAIL; | |
1741 | } | |
1742 | if (ret) { | |
1743 | /* Delete file in case of error */ | |
db471218 | 1744 | if (file_opened && unlink(config_file_path)) { |
fb198a11 JG |
1745 | PERROR("Unlinking XML session configuration."); |
1746 | } | |
1747 | } | |
1748 | ||
1749 | return ret; | |
1750 | } | |
1751 | ||
1752 | int cmd_save_sessions(struct lttng_save_session_attr *attr, | |
1753 | lttng_sock_cred *creds) | |
1754 | { | |
1755 | int ret; | |
1756 | const char *session_name; | |
1757 | struct ltt_session *session; | |
1758 | ||
1759 | session_lock_list(); | |
1760 | ||
1761 | session_name = lttng_save_session_attr_get_session_name(attr); | |
1762 | if (session_name) { | |
1763 | session = session_find_by_name(session_name); | |
1764 | if (!session) { | |
1765 | ret = LTTNG_ERR_SESS_NOT_FOUND; | |
1766 | goto end; | |
1767 | } | |
1768 | ||
1769 | session_lock(session); | |
1770 | ret = save_session(session, attr, creds); | |
1771 | session_unlock(session); | |
1772 | if (ret) { | |
1773 | goto end; | |
1774 | } | |
1775 | } else { | |
1776 | struct ltt_session_list *list = session_get_list(); | |
1777 | ||
1778 | cds_list_for_each_entry(session, &list->head, list) { | |
1779 | session_lock(session); | |
1780 | ret = save_session(session, attr, creds); | |
1781 | session_unlock(session); | |
1782 | ||
1783 | /* Don't abort if we don't have the required permissions. */ | |
1784 | if (ret && ret != LTTNG_ERR_EPERM) { | |
1785 | goto end; | |
1786 | } | |
1787 | } | |
1788 | } | |
1789 | ret = LTTNG_OK; | |
1790 | ||
1791 | end: | |
1792 | session_unlock_list(); | |
1793 | return ret; | |
1794 | } |