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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. */ | |
513 | kevent = trace_kernel_create_event(&events[i]); | |
514 | if (!kevent) { | |
515 | ret = -ENOMEM; | |
516 | goto end; | |
517 | } | |
518 | /* Init list in order so the destroy call can del the node. */ | |
519 | CDS_INIT_LIST_HEAD(&kevent->list); | |
520 | ||
521 | ret = save_kernel_event(writer, kevent); | |
522 | trace_kernel_destroy_event(kevent); | |
523 | if (ret) { | |
524 | goto end; | |
525 | } | |
526 | } | |
527 | ||
528 | /* Everything went well */ | |
529 | ret = 0; | |
530 | ||
531 | end: | |
532 | free(events); | |
533 | return ret; | |
534 | } | |
535 | ||
fb198a11 JG |
536 | static |
537 | int save_kernel_events(struct config_writer *writer, | |
0de3eda1 | 538 | struct ltt_kernel_channel *kchan) |
fb198a11 JG |
539 | { |
540 | int ret; | |
541 | struct ltt_kernel_event *event; | |
542 | ||
543 | ret = config_writer_open_element(writer, config_element_events); | |
544 | if (ret) { | |
545 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
546 | goto end; | |
547 | } | |
548 | ||
0de3eda1 | 549 | cds_list_for_each_entry(event, &kchan->events_list.head, list) { |
fb198a11 JG |
550 | ret = save_kernel_event(writer, event); |
551 | if (ret) { | |
552 | goto end; | |
553 | } | |
554 | } | |
555 | ||
0de3eda1 DG |
556 | /* Save syscalls if any. */ |
557 | ret = save_kernel_syscall(writer, kchan); | |
558 | if (ret) { | |
559 | goto end; | |
560 | } | |
561 | ||
fb198a11 JG |
562 | /* /events */ |
563 | ret = config_writer_close_element(writer); | |
564 | if (ret) { | |
565 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
566 | goto end; | |
567 | } | |
568 | end: | |
569 | return ret; | |
570 | } | |
571 | ||
572 | static | |
573 | int save_ust_event(struct config_writer *writer, | |
574 | struct ltt_ust_event *event) | |
575 | { | |
576 | int ret; | |
577 | const char *loglevel_type_string; | |
578 | ||
579 | ret = config_writer_open_element(writer, config_element_event); | |
580 | if (ret) { | |
581 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
582 | goto end; | |
583 | } | |
584 | ||
585 | if (event->attr.name[0]) { | |
586 | ret = config_writer_write_element_string(writer, | |
587 | config_element_name, event->attr.name); | |
588 | if (ret) { | |
589 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
590 | goto end; | |
591 | } | |
592 | } | |
593 | ||
594 | ret = config_writer_write_element_bool(writer, config_element_enabled, | |
595 | event->enabled); | |
596 | if (ret) { | |
597 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
598 | goto end; | |
599 | } | |
600 | ||
601 | if (event->attr.instrumentation != LTTNG_UST_TRACEPOINT) { | |
602 | ERR("Unsupported UST instrumentation type."); | |
603 | ret = LTTNG_ERR_INVALID; | |
604 | goto end; | |
605 | } | |
606 | ret = config_writer_write_element_string(writer, config_element_type, | |
607 | config_event_type_tracepoint); | |
608 | if (ret) { | |
609 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
610 | goto end; | |
611 | } | |
612 | ||
613 | loglevel_type_string = get_loglevel_type_string( | |
614 | event->attr.loglevel_type); | |
615 | if (!loglevel_type_string) { | |
616 | ERR("Unsupported UST loglevel type."); | |
617 | ret = LTTNG_ERR_INVALID; | |
618 | goto end; | |
619 | } | |
620 | ||
621 | ret = config_writer_write_element_string(writer, | |
622 | config_element_loglevel_type, loglevel_type_string); | |
623 | if (ret) { | |
624 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
625 | goto end; | |
626 | } | |
627 | ||
628 | ret = config_writer_write_element_signed_int(writer, | |
629 | config_element_loglevel, event->attr.loglevel); | |
630 | if (ret) { | |
631 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
632 | goto end; | |
633 | } | |
634 | ||
635 | if (event->filter_expression) { | |
636 | ret = config_writer_write_element_string(writer, | |
637 | config_element_filter, event->filter_expression); | |
638 | if (ret) { | |
639 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
640 | goto end; | |
641 | } | |
642 | } | |
643 | ||
644 | if (event->exclusion && event->exclusion->count) { | |
645 | uint32_t i; | |
646 | ||
647 | ret = config_writer_open_element(writer, | |
648 | config_element_exclusions); | |
649 | if (ret) { | |
650 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
651 | goto end; | |
652 | } | |
653 | ||
654 | for (i = 0; i < event->exclusion->count; i++) { | |
655 | ret = config_writer_write_element_string(writer, | |
656 | config_element_exclusion, | |
657 | &event->exclusion->names[0][i]); | |
658 | if (ret) { | |
659 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
660 | goto end; | |
661 | } | |
662 | } | |
663 | ||
664 | /* /exclusions */ | |
665 | ret = config_writer_close_element(writer); | |
666 | if (ret) { | |
667 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
668 | goto end; | |
669 | } | |
670 | } | |
671 | ||
672 | /* /event */ | |
673 | ret = config_writer_close_element(writer); | |
674 | if (ret) { | |
675 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
676 | goto end; | |
677 | } | |
678 | end: | |
679 | return ret; | |
680 | } | |
681 | ||
682 | static | |
683 | int save_ust_events(struct config_writer *writer, | |
684 | struct lttng_ht *events) | |
685 | { | |
686 | int ret; | |
687 | struct ltt_ust_event *event; | |
688 | struct lttng_ht_node_str *node; | |
689 | struct lttng_ht_iter iter; | |
690 | ||
691 | ret = config_writer_open_element(writer, config_element_events); | |
692 | if (ret) { | |
693 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
694 | goto end; | |
695 | } | |
696 | ||
697 | rcu_read_lock(); | |
698 | cds_lfht_for_each_entry(events->ht, &iter.iter, node, node) { | |
699 | event = caa_container_of(node, struct ltt_ust_event, node); | |
700 | ||
701 | ret = save_ust_event(writer, event); | |
702 | if (ret) { | |
703 | rcu_read_unlock(); | |
704 | goto end; | |
705 | } | |
706 | } | |
707 | rcu_read_unlock(); | |
708 | ||
709 | /* /events */ | |
710 | ret = config_writer_close_element(writer); | |
711 | if (ret) { | |
712 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
713 | goto end; | |
714 | } | |
715 | end: | |
716 | return ret; | |
717 | } | |
718 | ||
719 | static | |
720 | int save_kernel_context(struct config_writer *writer, | |
721 | struct lttng_kernel_context *ctx) | |
722 | { | |
723 | int ret = 0; | |
724 | ||
725 | if (!ctx) { | |
726 | goto end; | |
727 | } | |
728 | ||
fb198a11 JG |
729 | ret = config_writer_open_element(writer, config_element_context); |
730 | if (ret) { | |
731 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
732 | goto end; | |
733 | } | |
734 | ||
cba45eda | 735 | if (ctx->ctx == LTTNG_KERNEL_CONTEXT_PERF_CPU_COUNTER) { |
fb198a11 JG |
736 | ret = config_writer_open_element(writer, config_element_perf); |
737 | if (ret) { | |
738 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
739 | goto end; | |
740 | } | |
741 | ||
742 | ret = config_writer_write_element_unsigned_int(writer, | |
743 | config_element_type, ctx->u.perf_counter.type); | |
744 | if (ret) { | |
745 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
746 | goto end; | |
747 | } | |
748 | ||
749 | ret = config_writer_write_element_unsigned_int(writer, | |
750 | config_element_config, ctx->u.perf_counter.config); | |
751 | if (ret) { | |
752 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
753 | goto end; | |
754 | } | |
755 | ||
756 | ret = config_writer_write_element_string(writer, | |
757 | config_element_name, ctx->u.perf_counter.name); | |
758 | if (ret) { | |
759 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
760 | goto end; | |
761 | } | |
762 | ||
763 | /* /perf */ | |
764 | ret = config_writer_close_element(writer); | |
765 | if (ret) { | |
766 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
767 | goto end; | |
768 | } | |
769 | } else { | |
770 | const char *context_type_string = | |
771 | get_kernel_context_type_string(ctx->ctx); | |
772 | ||
773 | if (!context_type_string) { | |
774 | ERR("Unsupported kernel context type."); | |
775 | ret = LTTNG_ERR_INVALID; | |
776 | goto end; | |
777 | } | |
778 | ||
779 | ret = config_writer_write_element_string(writer, | |
780 | config_element_type, context_type_string); | |
781 | if (ret) { | |
782 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
783 | goto end; | |
784 | } | |
785 | } | |
786 | ||
787 | /* /context */ | |
788 | ret = config_writer_close_element(writer); | |
789 | if (ret) { | |
790 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
791 | goto end; | |
792 | } | |
793 | ||
645328ae DG |
794 | end: |
795 | return ret; | |
796 | } | |
797 | ||
798 | static | |
799 | int save_kernel_contexts(struct config_writer *writer, | |
800 | struct ltt_kernel_channel *kchan) | |
801 | { | |
802 | int ret; | |
803 | struct ltt_kernel_context *ctx; | |
804 | ||
2aa64052 JG |
805 | if (cds_list_empty(&kchan->ctx_list)) { |
806 | ret = 0; | |
807 | goto end; | |
808 | } | |
809 | ||
645328ae DG |
810 | ret = config_writer_open_element(writer, config_element_contexts); |
811 | if (ret) { | |
812 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
813 | goto end; | |
814 | } | |
815 | ||
816 | cds_list_for_each_entry(ctx, &kchan->ctx_list, list) { | |
817 | ret = save_kernel_context(writer, &ctx->ctx); | |
818 | if (ret) { | |
819 | goto end; | |
820 | } | |
821 | } | |
822 | ||
fb198a11 JG |
823 | /* /contexts */ |
824 | ret = config_writer_close_element(writer); | |
825 | if (ret) { | |
826 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
827 | goto end; | |
828 | } | |
829 | end: | |
830 | return ret; | |
831 | } | |
832 | ||
833 | static | |
834 | int save_ust_context(struct config_writer *writer, | |
835 | struct cds_list_head *ctx_list) | |
836 | { | |
837 | int ret; | |
838 | struct ltt_ust_context *ctx; | |
839 | ||
840 | assert(writer); | |
841 | assert(ctx_list); | |
842 | ||
843 | ret = config_writer_open_element(writer, config_element_contexts); | |
844 | if (ret) { | |
845 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
846 | goto end; | |
847 | } | |
848 | ||
849 | cds_list_for_each_entry(ctx, ctx_list, list) { | |
850 | const char *context_type_string; | |
851 | ||
fb198a11 JG |
852 | |
853 | ret = config_writer_open_element(writer, | |
854 | config_element_context); | |
855 | if (ret) { | |
856 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
857 | goto end; | |
858 | } | |
859 | ||
14ce5bd8 JG |
860 | if (ctx->ctx.ctx == LTTNG_UST_CONTEXT_PERF_THREAD_COUNTER) { |
861 | /* Perf contexts are saved as event_perf_context_type */ | |
862 | ret = config_writer_open_element(writer, | |
863 | config_element_perf); | |
864 | if (ret) { | |
865 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
866 | goto end; | |
867 | } | |
868 | ||
869 | ret = config_writer_write_element_unsigned_int(writer, | |
870 | config_element_type, | |
871 | ctx->ctx.u.perf_counter.type); | |
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_config, | |
879 | ctx->ctx.u.perf_counter.config); | |
880 | if (ret) { | |
881 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
882 | goto end; | |
883 | } | |
884 | ||
885 | ret = config_writer_write_element_string(writer, | |
886 | config_element_name, | |
887 | ctx->ctx.u.perf_counter.name); | |
888 | if (ret) { | |
889 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
890 | goto end; | |
891 | } | |
892 | ||
893 | /* /perf */ | |
894 | ret = config_writer_close_element(writer); | |
895 | if (ret) { | |
896 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
897 | goto end; | |
898 | } | |
899 | } else { | |
900 | /* Save context as event_context_type_type */ | |
901 | context_type_string = get_ust_context_type_string( | |
902 | ctx->ctx.ctx); | |
903 | if (!context_type_string) { | |
904 | ERR("Unsupported UST context type.") | |
905 | ret = LTTNG_ERR_INVALID; | |
906 | goto end; | |
907 | } | |
908 | ||
909 | ret = config_writer_write_element_string(writer, | |
910 | config_element_type, context_type_string); | |
911 | if (ret) { | |
912 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
913 | goto end; | |
914 | } | |
fb198a11 JG |
915 | } |
916 | ||
917 | /* /context */ | |
918 | ret = config_writer_close_element(writer); | |
919 | if (ret) { | |
920 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
921 | goto end; | |
922 | } | |
923 | } | |
924 | ||
925 | /* /contexts */ | |
926 | ret = config_writer_close_element(writer); | |
927 | if (ret) { | |
928 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
929 | goto end; | |
930 | } | |
931 | end: | |
932 | return ret; | |
933 | } | |
934 | ||
935 | static | |
936 | int save_kernel_channel(struct config_writer *writer, | |
937 | struct ltt_kernel_channel *kchan) | |
938 | { | |
939 | int ret; | |
940 | ||
941 | assert(writer); | |
942 | assert(kchan); | |
943 | ||
944 | ret = config_writer_open_element(writer, config_element_channel); | |
945 | if (ret) { | |
946 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
947 | goto end; | |
948 | } | |
949 | ||
950 | ret = config_writer_write_element_string(writer, config_element_name, | |
951 | kchan->channel->name); | |
952 | if (ret) { | |
953 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
954 | goto end; | |
955 | } | |
956 | ||
957 | ret = config_writer_write_element_bool(writer, config_element_enabled, | |
958 | kchan->channel->enabled); | |
959 | if (ret) { | |
960 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
961 | goto end; | |
962 | } | |
963 | ||
964 | ret = save_kernel_channel_attributes(writer, &kchan->channel->attr); | |
965 | if (ret) { | |
966 | goto end; | |
967 | } | |
968 | ||
0de3eda1 | 969 | ret = save_kernel_events(writer, kchan); |
fb198a11 JG |
970 | if (ret) { |
971 | goto end; | |
972 | } | |
973 | ||
645328ae | 974 | ret = save_kernel_contexts(writer, kchan); |
fb198a11 JG |
975 | if (ret) { |
976 | goto end; | |
977 | } | |
978 | ||
979 | /* /channel */ | |
980 | ret = config_writer_close_element(writer); | |
981 | if (ret) { | |
982 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
983 | goto end; | |
984 | } | |
985 | end: | |
986 | return ret; | |
987 | } | |
988 | ||
989 | static | |
990 | int save_ust_channel(struct config_writer *writer, | |
991 | struct ltt_ust_channel *ust_chan, | |
992 | struct ltt_ust_session *session) | |
993 | { | |
994 | int ret; | |
995 | ||
996 | assert(writer); | |
997 | assert(ust_chan); | |
998 | assert(session); | |
999 | ||
1000 | ret = config_writer_open_element(writer, config_element_channel); | |
1001 | if (ret) { | |
1002 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1003 | goto end; | |
1004 | } | |
1005 | ||
1006 | ret = config_writer_write_element_string(writer, config_element_name, | |
1007 | ust_chan->name); | |
1008 | if (ret) { | |
1009 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1010 | goto end; | |
1011 | } | |
1012 | ||
1013 | ret = config_writer_write_element_bool(writer, config_element_enabled, | |
1014 | ust_chan->enabled); | |
1015 | if (ret) { | |
1016 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1017 | goto end; | |
1018 | } | |
1019 | ||
1020 | ret = save_ust_channel_attributes(writer, &ust_chan->attr); | |
1021 | if (ret) { | |
1022 | goto end; | |
1023 | } | |
1024 | ||
1025 | ret = config_writer_write_element_unsigned_int(writer, | |
1026 | config_element_tracefile_size, ust_chan->tracefile_size); | |
1027 | if (ret) { | |
1028 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1029 | goto end; | |
1030 | } | |
1031 | ||
1032 | ret = config_writer_write_element_unsigned_int(writer, | |
1033 | config_element_tracefile_count, ust_chan->tracefile_count); | |
1034 | if (ret) { | |
1035 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1036 | goto end; | |
1037 | } | |
1038 | ||
1039 | ret = config_writer_write_element_unsigned_int(writer, | |
1040 | config_element_live_timer_interval, | |
1041 | session->live_timer_interval); | |
1042 | if (ret) { | |
1043 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1044 | goto end; | |
1045 | } | |
1046 | ||
1047 | ret = save_ust_events(writer, ust_chan->events); | |
1048 | if (ret) { | |
1049 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1050 | goto end; | |
1051 | } | |
1052 | ||
1053 | ret = save_ust_context(writer, &ust_chan->ctx_list); | |
1054 | if (ret) { | |
1055 | goto end; | |
1056 | } | |
1057 | ||
1058 | /* /channel */ | |
1059 | ret = config_writer_close_element(writer); | |
1060 | if (ret) { | |
1061 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1062 | goto end; | |
1063 | } | |
1064 | end: | |
1065 | return ret; | |
1066 | } | |
1067 | ||
1068 | static | |
1069 | int save_kernel_session(struct config_writer *writer, | |
1070 | struct ltt_session *session) | |
1071 | { | |
1072 | int ret; | |
1073 | struct ltt_kernel_channel *kchan; | |
1074 | ||
1075 | assert(writer); | |
1076 | assert(session); | |
1077 | ||
1078 | ret = config_writer_write_element_string(writer, config_element_type, | |
1079 | config_domain_type_kernel); | |
1080 | if (ret) { | |
1081 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1082 | goto end; | |
1083 | } | |
1084 | ||
1085 | ret = config_writer_write_element_string(writer, | |
1086 | config_element_buffer_type, config_buffer_type_global); | |
1087 | if (ret) { | |
1088 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1089 | goto end; | |
1090 | } | |
1091 | ||
1092 | ret = config_writer_open_element(writer, | |
1093 | config_element_channels); | |
1094 | if (ret) { | |
1095 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1096 | goto end; | |
1097 | } | |
1098 | ||
1099 | cds_list_for_each_entry(kchan, &session->kernel_session->channel_list.head, | |
1100 | list) { | |
1101 | ret = save_kernel_channel(writer, kchan); | |
1102 | if (ret) { | |
1103 | goto end; | |
1104 | } | |
1105 | } | |
1106 | ||
1107 | /* /channels */ | |
1108 | ret = config_writer_close_element(writer); | |
1109 | if (ret) { | |
1110 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1111 | goto end; | |
1112 | } | |
1113 | end: | |
1114 | return ret; | |
1115 | } | |
1116 | ||
1117 | static | |
1118 | int save_ust_session(struct config_writer *writer, | |
022d91ba | 1119 | struct ltt_session *session, int save_agent) |
fb198a11 JG |
1120 | { |
1121 | int ret; | |
1122 | struct ltt_ust_channel *ust_chan; | |
1123 | const char *buffer_type_string; | |
1124 | struct lttng_ht_node_str *node; | |
1125 | struct lttng_ht_iter iter; | |
1126 | ||
1127 | assert(writer); | |
1128 | assert(session); | |
1129 | ||
1130 | ret = config_writer_write_element_string(writer, config_element_type, | |
022d91ba | 1131 | save_agent ? config_domain_type_jul : config_domain_type_ust); |
fb198a11 JG |
1132 | if (ret) { |
1133 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1134 | goto end; | |
1135 | } | |
1136 | ||
1137 | buffer_type_string = get_buffer_type_string( | |
1138 | session->ust_session->buffer_type); | |
1139 | if (!buffer_type_string) { | |
1140 | ERR("Unsupported buffer type."); | |
1141 | ret = LTTNG_ERR_INVALID; | |
1142 | goto end; | |
1143 | } | |
1144 | ||
1145 | ret = config_writer_write_element_string(writer, | |
1146 | config_element_buffer_type, buffer_type_string); | |
1147 | if (ret) { | |
1148 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1149 | goto end; | |
1150 | } | |
1151 | ||
1152 | ret = config_writer_open_element(writer, config_element_channels); | |
1153 | if (ret) { | |
1154 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1155 | goto end; | |
1156 | } | |
1157 | ||
1158 | rcu_read_lock(); | |
1159 | cds_lfht_for_each_entry(session->ust_session->domain_global.channels->ht, | |
1160 | &iter.iter, node, node) { | |
022d91ba | 1161 | int agent_channel; |
fb198a11 JG |
1162 | |
1163 | ust_chan = caa_container_of(node, struct ltt_ust_channel, node); | |
da6c3a50 | 1164 | agent_channel = !strcmp(DEFAULT_JUL_CHANNEL_NAME, ust_chan->name) || |
0e115563 DG |
1165 | !strcmp(DEFAULT_LOG4J_CHANNEL_NAME, ust_chan->name) || |
1166 | !strcmp(DEFAULT_PYTHON_CHANNEL_NAME, ust_chan->name); | |
022d91ba | 1167 | if (!(save_agent ^ agent_channel)) { |
fb198a11 JG |
1168 | ret = save_ust_channel(writer, ust_chan, session->ust_session); |
1169 | if (ret) { | |
1170 | rcu_read_unlock(); | |
1171 | goto end; | |
1172 | } | |
1173 | } | |
1174 | } | |
1175 | rcu_read_unlock(); | |
1176 | ||
1177 | /* /channels */ | |
1178 | ret = config_writer_close_element(writer); | |
1179 | if (ret) { | |
1180 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1181 | goto end; | |
1182 | } | |
1183 | end: | |
1184 | return ret; | |
1185 | } | |
1186 | ||
1187 | static | |
1188 | int save_domains(struct config_writer *writer, struct ltt_session *session) | |
1189 | { | |
1190 | int ret = 0; | |
1191 | ||
1192 | assert(writer); | |
1193 | assert(session); | |
1194 | ||
1195 | if (!session->kernel_session && !session->ust_session) { | |
1196 | goto end; | |
1197 | } | |
1198 | ||
1199 | ret = config_writer_open_element(writer, config_element_domains); | |
1200 | if (ret) { | |
1201 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1202 | goto end; | |
1203 | } | |
1204 | ||
1205 | ||
1206 | if (session->kernel_session) { | |
1207 | ret = config_writer_open_element(writer, | |
1208 | config_element_domain); | |
1209 | if (ret) { | |
1210 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1211 | goto end; | |
1212 | } | |
1213 | ||
1214 | ret = save_kernel_session(writer, session); | |
1215 | if (ret) { | |
1216 | goto end; | |
1217 | } | |
1218 | ||
1219 | /* /domain */ | |
1220 | ret = config_writer_close_element(writer); | |
1221 | if (ret) { | |
1222 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1223 | goto end; | |
1224 | } | |
1225 | } | |
1226 | ||
1227 | if (session->ust_session) { | |
65d72c41 JG |
1228 | unsigned long agent_count; |
1229 | ||
fb198a11 JG |
1230 | ret = config_writer_open_element(writer, |
1231 | config_element_domain); | |
1232 | if (ret) { | |
1233 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1234 | goto end; | |
1235 | } | |
1236 | ||
1237 | ret = save_ust_session(writer, session, 0); | |
1238 | if (ret) { | |
1239 | goto end; | |
1240 | } | |
1241 | ||
1242 | /* /domain */ | |
1243 | ret = config_writer_close_element(writer); | |
1244 | if (ret) { | |
1245 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1246 | goto end; | |
1247 | } | |
fb198a11 | 1248 | |
65d72c41 JG |
1249 | rcu_read_lock(); |
1250 | agent_count = | |
1251 | lttng_ht_get_count(session->ust_session->agents); | |
1252 | rcu_read_unlock(); | |
fb198a11 | 1253 | |
65d72c41 JG |
1254 | if (agent_count > 0) { |
1255 | ret = config_writer_open_element(writer, | |
1256 | config_element_domain); | |
1257 | if (ret) { | |
1258 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1259 | goto end; | |
1260 | } | |
fb198a11 | 1261 | |
65d72c41 JG |
1262 | ret = save_ust_session(writer, session, 1); |
1263 | if (ret) { | |
1264 | goto end; | |
1265 | } | |
1266 | ||
1267 | /* /domain */ | |
1268 | ret = config_writer_close_element(writer); | |
1269 | if (ret) { | |
1270 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1271 | goto end; | |
1272 | } | |
fb198a11 JG |
1273 | } |
1274 | } | |
1275 | ||
65d72c41 JG |
1276 | if (session->ust_session) { |
1277 | } | |
1278 | ||
fb198a11 JG |
1279 | /* /domains */ |
1280 | ret = config_writer_close_element(writer); | |
1281 | if (ret) { | |
1282 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1283 | goto end; | |
1284 | } | |
1285 | end: | |
1286 | return ret; | |
1287 | } | |
1288 | ||
1289 | static | |
1290 | int save_consumer_output(struct config_writer *writer, | |
1291 | struct consumer_output *output) | |
1292 | { | |
1293 | int ret; | |
1294 | ||
1295 | assert(writer); | |
1296 | assert(output); | |
1297 | ||
1298 | ret = config_writer_open_element(writer, config_element_consumer_output); | |
1299 | if (ret) { | |
1300 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1301 | goto end; | |
1302 | } | |
1303 | ||
1304 | ret = config_writer_write_element_bool(writer, config_element_enabled, | |
1305 | output->enabled); | |
1306 | if (ret) { | |
1307 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1308 | goto end; | |
1309 | } | |
1310 | ||
1311 | ret = config_writer_open_element(writer, config_element_destination); | |
1312 | if (ret) { | |
1313 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1314 | goto end; | |
1315 | } | |
1316 | ||
1317 | switch (output->type) { | |
1318 | case CONSUMER_DST_LOCAL: | |
1319 | ret = config_writer_write_element_string(writer, | |
1320 | config_element_path, output->dst.trace_path); | |
1321 | if (ret) { | |
1322 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1323 | goto end; | |
1324 | } | |
1325 | break; | |
1326 | case CONSUMER_DST_NET: | |
1327 | { | |
1328 | char *uri; | |
1329 | ||
1330 | uri = zmalloc(PATH_MAX); | |
1331 | if (!uri) { | |
1332 | ret = LTTNG_ERR_NOMEM; | |
1333 | goto end; | |
1334 | } | |
1335 | ||
1336 | ret = config_writer_open_element(writer, config_element_net_output); | |
1337 | if (ret) { | |
1338 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1339 | goto end_net_output; | |
1340 | } | |
1341 | ||
1342 | if (output->dst.net.control_isset && | |
1343 | output->dst.net.data_isset) { | |
1344 | ret = uri_to_str_url(&output->dst.net.control, uri, PATH_MAX); | |
1345 | if (ret < 0) { | |
1346 | ret = LTTNG_ERR_INVALID; | |
1347 | goto end_net_output; | |
1348 | } | |
1349 | ||
1350 | ret = config_writer_write_element_string(writer, | |
1351 | config_element_control_uri, uri); | |
1352 | if (ret) { | |
1353 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1354 | goto end_net_output; | |
1355 | } | |
1356 | ||
1357 | ret = uri_to_str_url(&output->dst.net.data, uri, PATH_MAX); | |
1358 | if (ret < 0) { | |
1359 | ret = LTTNG_ERR_INVALID; | |
1360 | goto end_net_output; | |
1361 | } | |
1362 | ||
1363 | ret = config_writer_write_element_string(writer, | |
1364 | config_element_data_uri, uri); | |
1365 | if (ret) { | |
1366 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1367 | goto end_net_output; | |
1368 | } | |
1369 | ||
1370 | end_net_output: | |
1371 | free(uri); | |
1372 | if (ret) { | |
1373 | goto end; | |
1374 | } | |
1375 | } else { | |
1376 | ret = !output->dst.net.control_isset ? | |
1377 | LTTNG_ERR_URL_CTRL_MISS : | |
1378 | LTTNG_ERR_URL_DATA_MISS; | |
c39270e5 | 1379 | free(uri); |
fb198a11 JG |
1380 | goto end; |
1381 | } | |
1382 | ||
1383 | ret = config_writer_close_element(writer); | |
1384 | if (ret) { | |
1385 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1386 | goto end; | |
1387 | } | |
1388 | break; | |
1389 | } | |
1390 | default: | |
1391 | ERR("Unsupported consumer output type."); | |
1392 | ret = LTTNG_ERR_INVALID; | |
1393 | goto end; | |
1394 | } | |
1395 | ||
1396 | /* /destination */ | |
1397 | ret = config_writer_close_element(writer); | |
1398 | if (ret) { | |
1399 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1400 | goto end; | |
1401 | } | |
1402 | ||
1403 | /* /consumer_output */ | |
1404 | ret = config_writer_close_element(writer); | |
1405 | if (ret) { | |
1406 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1407 | goto end; | |
1408 | } | |
1409 | end: | |
1410 | return ret; | |
1411 | } | |
1412 | ||
1413 | static | |
1414 | int save_snapshot_outputs(struct config_writer *writer, | |
1415 | struct snapshot *snapshot) | |
1416 | { | |
1417 | int ret; | |
1418 | struct lttng_ht_iter iter; | |
1419 | struct snapshot_output *output; | |
1420 | ||
1421 | assert(writer); | |
1422 | assert(snapshot); | |
1423 | ||
1424 | ret = config_writer_open_element(writer, config_element_snapshot_outputs); | |
1425 | if (ret) { | |
1426 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1427 | goto end; | |
1428 | } | |
1429 | ||
1430 | rcu_read_lock(); | |
1431 | cds_lfht_for_each_entry(snapshot->output_ht->ht, &iter.iter, output, | |
1432 | node.node) { | |
1433 | ret = config_writer_open_element(writer, | |
1434 | config_element_output); | |
1435 | if (ret) { | |
1436 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1437 | goto end_unlock; | |
1438 | } | |
1439 | ||
1440 | ret = config_writer_write_element_string(writer, | |
1441 | config_element_name, output->name); | |
1442 | if (ret) { | |
1443 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1444 | goto end_unlock; | |
1445 | } | |
1446 | ||
1447 | ret = config_writer_write_element_unsigned_int(writer, | |
1448 | config_element_max_size, output->max_size); | |
1449 | if (ret) { | |
1450 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1451 | goto end_unlock; | |
1452 | } | |
1453 | ||
1454 | ret = save_consumer_output(writer, output->consumer); | |
1455 | if (ret) { | |
1456 | goto end_unlock; | |
1457 | } | |
1458 | ||
1459 | /* /output */ | |
1460 | ret = config_writer_close_element(writer); | |
1461 | if (ret) { | |
1462 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1463 | goto end_unlock; | |
1464 | } | |
1465 | } | |
1466 | rcu_read_unlock(); | |
1467 | ||
1468 | /* /snapshot_outputs */ | |
1469 | ret = config_writer_close_element(writer); | |
1470 | if (ret) { | |
1471 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1472 | goto end; | |
1473 | } | |
1474 | ||
1475 | end: | |
1476 | return ret; | |
1477 | end_unlock: | |
1478 | rcu_read_unlock(); | |
1479 | return ret; | |
1480 | } | |
1481 | ||
1482 | static | |
1483 | int save_session_output(struct config_writer *writer, | |
1484 | struct ltt_session *session) | |
1485 | { | |
1486 | int ret; | |
1487 | ||
1488 | assert(writer); | |
1489 | assert(session); | |
1490 | ||
1491 | if ((session->snapshot_mode && session->snapshot.nb_output == 0) || | |
1492 | (!session->snapshot_mode && !session->consumer)) { | |
1493 | /* Session is in no output mode */ | |
1494 | ret = 0; | |
1495 | goto end; | |
1496 | } | |
1497 | ||
1498 | ret = config_writer_open_element(writer, config_element_output); | |
1499 | if (ret) { | |
1500 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1501 | goto end; | |
1502 | } | |
1503 | ||
1504 | if (session->snapshot_mode) { | |
1505 | ret = save_snapshot_outputs(writer, &session->snapshot); | |
1506 | if (ret) { | |
1507 | goto end; | |
1508 | } | |
1509 | } else { | |
1510 | if (session->consumer) { | |
1511 | ret = save_consumer_output(writer, session->consumer); | |
1512 | if (ret) { | |
1513 | goto end; | |
1514 | } | |
1515 | } | |
1516 | } | |
1517 | ||
1518 | /* /output */ | |
1519 | ret = config_writer_close_element(writer); | |
1520 | if (ret) { | |
1521 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1522 | goto end; | |
1523 | } | |
1524 | end: | |
1525 | return ret; | |
1526 | } | |
1527 | ||
1528 | /* | |
1529 | * Save the given session. | |
1530 | * | |
1531 | * Return 0 on success else a LTTNG_ERR* code. | |
1532 | */ | |
1533 | static | |
1534 | int save_session(struct ltt_session *session, | |
1535 | struct lttng_save_session_attr *attr, lttng_sock_cred *creds) | |
1536 | { | |
1537 | int ret, fd; | |
db471218 | 1538 | unsigned int file_opened = 0; /* Indicate if the file has been opened */ |
fb198a11 JG |
1539 | char config_file_path[PATH_MAX]; |
1540 | size_t len; | |
1541 | struct config_writer *writer = NULL; | |
1542 | size_t session_name_len; | |
1543 | const char *provided_path; | |
1544 | ||
1545 | assert(session); | |
1546 | assert(attr); | |
1547 | assert(creds); | |
1548 | ||
1549 | session_name_len = strlen(session->name); | |
95a29ab8 | 1550 | memset(config_file_path, 0, sizeof(config_file_path)); |
fb198a11 JG |
1551 | |
1552 | if (!session_access_ok(session, | |
1553 | LTTNG_SOCK_GET_UID_CRED(creds), | |
1554 | LTTNG_SOCK_GET_GID_CRED(creds))) { | |
1555 | ret = LTTNG_ERR_EPERM; | |
1556 | goto end; | |
1557 | } | |
1558 | ||
1559 | provided_path = lttng_save_session_attr_get_output_url(attr); | |
1560 | if (provided_path) { | |
95a29ab8 | 1561 | DBG3("Save session in provided path %s", provided_path); |
fb198a11 | 1562 | len = strlen(provided_path); |
d2992717 | 1563 | if (len >= sizeof(config_file_path)) { |
fb198a11 JG |
1564 | ret = LTTNG_ERR_SET_URL; |
1565 | goto end; | |
1566 | } | |
1567 | strncpy(config_file_path, provided_path, len); | |
1568 | } else { | |
7e078ad1 | 1569 | ssize_t ret_len; |
fb198a11 JG |
1570 | char *home_dir = utils_get_user_home_dir( |
1571 | LTTNG_SOCK_GET_UID_CRED(creds)); | |
1572 | if (!home_dir) { | |
1573 | ret = LTTNG_ERR_SET_URL; | |
1574 | goto end; | |
1575 | } | |
1576 | ||
d2992717 | 1577 | ret_len = snprintf(config_file_path, sizeof(config_file_path), |
fb198a11 JG |
1578 | DEFAULT_SESSION_HOME_CONFIGPATH, home_dir); |
1579 | free(home_dir); | |
7e078ad1 | 1580 | if (ret_len < 0) { |
fb198a11 JG |
1581 | PERROR("snprintf save session"); |
1582 | ret = LTTNG_ERR_SET_URL; | |
1583 | goto end; | |
1584 | } | |
7e078ad1 | 1585 | len = ret_len; |
fb198a11 JG |
1586 | } |
1587 | ||
1588 | /* | |
d2992717 DG |
1589 | * Check the path fits in the config file path dst including the '/' |
1590 | * followed by trailing .lttng extension and the NULL terminated string. | |
fb198a11 | 1591 | */ |
d2992717 DG |
1592 | if ((len + session_name_len + 2 + |
1593 | sizeof(DEFAULT_SESSION_CONFIG_FILE_EXTENSION)) | |
1594 | > sizeof(config_file_path)) { | |
fb198a11 JG |
1595 | ret = LTTNG_ERR_SET_URL; |
1596 | goto end; | |
1597 | } | |
1598 | ||
1599 | ret = run_as_mkdir_recursive(config_file_path, S_IRWXU | S_IRWXG, | |
1600 | LTTNG_SOCK_GET_UID_CRED(creds), LTTNG_SOCK_GET_GID_CRED(creds)); | |
1601 | if (ret) { | |
1602 | ret = LTTNG_ERR_SET_URL; | |
1603 | goto end; | |
1604 | } | |
1605 | ||
d2992717 DG |
1606 | /* |
1607 | * At this point, we know that everything fits in the buffer. Validation | |
1608 | * was done just above. | |
1609 | */ | |
fb198a11 JG |
1610 | config_file_path[len++] = '/'; |
1611 | strncpy(config_file_path + len, session->name, session_name_len); | |
1612 | len += session_name_len; | |
1613 | strcpy(config_file_path + len, DEFAULT_SESSION_CONFIG_FILE_EXTENSION); | |
95a29ab8 DG |
1614 | len += sizeof(DEFAULT_SESSION_CONFIG_FILE_EXTENSION); |
1615 | config_file_path[len] = '\0'; | |
fb198a11 JG |
1616 | |
1617 | if (!access(config_file_path, F_OK) && !attr->overwrite) { | |
f9b57ab2 DG |
1618 | /* File exists, notify the user since the overwrite flag is off. */ |
1619 | ret = LTTNG_ERR_SAVE_FILE_EXIST; | |
fb198a11 JG |
1620 | goto end; |
1621 | } | |
1622 | ||
1623 | fd = run_as_open(config_file_path, O_CREAT | O_WRONLY | O_TRUNC, | |
1624 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP, | |
1625 | LTTNG_SOCK_GET_UID_CRED(creds), LTTNG_SOCK_GET_GID_CRED(creds)); | |
1626 | if (fd < 0) { | |
1627 | PERROR("Could not create configuration file"); | |
1628 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1629 | goto end; | |
1630 | } | |
db471218 | 1631 | file_opened = 1; |
fb198a11 | 1632 | |
705bb62f | 1633 | writer = config_writer_create(fd, 1); |
fb198a11 JG |
1634 | if (!writer) { |
1635 | ret = LTTNG_ERR_NOMEM; | |
1636 | goto end; | |
1637 | } | |
1638 | ||
1639 | ret = config_writer_open_element(writer, config_element_sessions); | |
1640 | if (ret) { | |
1641 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1642 | goto end; | |
1643 | } | |
1644 | ||
1645 | ret = config_writer_open_element(writer, config_element_session); | |
1646 | if (ret) { | |
1647 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1648 | goto end; | |
1649 | } | |
1650 | ||
1651 | ret = config_writer_write_element_string(writer, config_element_name, | |
1652 | session->name); | |
1653 | if (ret) { | |
1654 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1655 | goto end; | |
1656 | } | |
1657 | ||
1658 | ret = save_domains(writer, session); | |
1659 | if (ret) { | |
1660 | goto end; | |
1661 | } | |
1662 | ||
1663 | ret = config_writer_write_element_bool(writer, config_element_started, | |
8382cf6f | 1664 | session->active); |
fb198a11 JG |
1665 | if (ret) { |
1666 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1667 | goto end; | |
1668 | } | |
1669 | ||
1670 | if (session->snapshot_mode || session->live_timer) { | |
1671 | ret = config_writer_open_element(writer, config_element_attributes); | |
1672 | if (ret) { | |
1673 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1674 | goto end; | |
1675 | } | |
1676 | ||
1677 | if (session->snapshot_mode) { | |
1678 | ret = config_writer_write_element_bool(writer, | |
1679 | config_element_snapshot_mode, 1); | |
1680 | if (ret) { | |
1681 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1682 | goto end; | |
1683 | } | |
1684 | } else { | |
d98ad589 | 1685 | ret = config_writer_write_element_unsigned_int(writer, |
fb198a11 JG |
1686 | config_element_live_timer_interval, session->live_timer); |
1687 | if (ret) { | |
1688 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1689 | goto end; | |
1690 | } | |
1691 | } | |
1692 | ||
1693 | /* /attributes */ | |
1694 | ret = config_writer_close_element(writer); | |
1695 | if (ret) { | |
1696 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1697 | goto end; | |
1698 | } | |
1699 | } | |
1700 | ||
1701 | ret = save_session_output(writer, session); | |
1702 | if (ret) { | |
1703 | goto end; | |
1704 | } | |
1705 | ||
1706 | /* /session */ | |
1707 | ret = config_writer_close_element(writer); | |
1708 | if (ret) { | |
1709 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1710 | goto end; | |
1711 | } | |
1712 | ||
1713 | /* /sessions */ | |
1714 | ret = config_writer_close_element(writer); | |
1715 | if (ret) { | |
1716 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1717 | goto end; | |
1718 | } | |
1719 | end: | |
1720 | if (writer && config_writer_destroy(writer)) { | |
1721 | /* Preserve the original error code */ | |
1722 | ret = ret ? ret : LTTNG_ERR_SAVE_IO_FAIL; | |
1723 | } | |
1724 | if (ret) { | |
1725 | /* Delete file in case of error */ | |
db471218 | 1726 | if (file_opened && unlink(config_file_path)) { |
fb198a11 JG |
1727 | PERROR("Unlinking XML session configuration."); |
1728 | } | |
1729 | } | |
1730 | ||
1731 | return ret; | |
1732 | } | |
1733 | ||
1734 | int cmd_save_sessions(struct lttng_save_session_attr *attr, | |
1735 | lttng_sock_cred *creds) | |
1736 | { | |
1737 | int ret; | |
1738 | const char *session_name; | |
1739 | struct ltt_session *session; | |
1740 | ||
1741 | session_lock_list(); | |
1742 | ||
1743 | session_name = lttng_save_session_attr_get_session_name(attr); | |
1744 | if (session_name) { | |
1745 | session = session_find_by_name(session_name); | |
1746 | if (!session) { | |
1747 | ret = LTTNG_ERR_SESS_NOT_FOUND; | |
1748 | goto end; | |
1749 | } | |
1750 | ||
1751 | session_lock(session); | |
1752 | ret = save_session(session, attr, creds); | |
1753 | session_unlock(session); | |
1754 | if (ret) { | |
1755 | goto end; | |
1756 | } | |
1757 | } else { | |
1758 | struct ltt_session_list *list = session_get_list(); | |
1759 | ||
1760 | cds_list_for_each_entry(session, &list->head, list) { | |
1761 | session_lock(session); | |
1762 | ret = save_session(session, attr, creds); | |
1763 | session_unlock(session); | |
1764 | ||
1765 | /* Don't abort if we don't have the required permissions. */ | |
1766 | if (ret && ret != LTTNG_ERR_EPERM) { | |
1767 | goto end; | |
1768 | } | |
1769 | } | |
1770 | } | |
1771 | ret = LTTNG_OK; | |
1772 | ||
1773 | end: | |
1774 | session_unlock_list(); | |
1775 | return ret; | |
1776 | } |