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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 | |
19 | #include <assert.h> | |
20 | #include <inttypes.h> | |
21 | #include <string.h> | |
22 | #include <urcu/uatomic.h> | |
23 | #include <unistd.h> | |
24 | ||
25 | #include <common/defaults.h> | |
26 | #include <common/error.h> | |
27 | #include <common/config/config.h> | |
fb198a11 JG |
28 | #include <common/utils.h> |
29 | #include <common/runas.h> | |
30 | #include <lttng/save-internal.h> | |
31 | ||
32 | #include "save.h" | |
33 | #include "session.h" | |
0de3eda1 | 34 | #include "syscall.h" |
fb198a11 JG |
35 | #include "trace-ust.h" |
36 | ||
37 | static | |
38 | int save_kernel_channel_attributes(struct config_writer *writer, | |
39 | struct lttng_channel_attr *attr) | |
40 | { | |
41 | int ret; | |
42 | ||
43 | ret = config_writer_write_element_string(writer, | |
44 | config_element_overwrite_mode, | |
45 | attr->overwrite ? config_overwrite_mode_overwrite : | |
46 | config_overwrite_mode_discard); | |
47 | if (ret) { | |
48 | goto end; | |
49 | } | |
50 | ||
51 | ret = config_writer_write_element_unsigned_int(writer, | |
52 | config_element_subbuf_size, attr->subbuf_size); | |
53 | if (ret) { | |
54 | goto end; | |
55 | } | |
56 | ||
57 | ret = config_writer_write_element_unsigned_int(writer, | |
58 | config_element_num_subbuf, | |
59 | attr->num_subbuf); | |
60 | if (ret) { | |
61 | goto end; | |
62 | } | |
63 | ||
64 | ret = config_writer_write_element_unsigned_int(writer, | |
65 | config_element_switch_timer_interval, | |
66 | attr->switch_timer_interval); | |
67 | if (ret) { | |
68 | goto end; | |
69 | } | |
70 | ||
71 | ret = config_writer_write_element_unsigned_int(writer, | |
72 | config_element_read_timer_interval, | |
73 | attr->read_timer_interval); | |
74 | if (ret) { | |
75 | goto end; | |
76 | } | |
77 | ||
78 | ret = config_writer_write_element_string(writer, | |
79 | config_element_output_type, | |
80 | attr->output == LTTNG_EVENT_SPLICE ? | |
81 | config_output_type_splice : config_output_type_mmap); | |
82 | if (ret) { | |
83 | goto end; | |
84 | } | |
85 | ||
86 | ret = config_writer_write_element_unsigned_int(writer, | |
87 | config_element_tracefile_size, attr->tracefile_size); | |
88 | if (ret) { | |
89 | goto end; | |
90 | } | |
91 | ||
92 | ret = config_writer_write_element_unsigned_int(writer, | |
93 | config_element_tracefile_count, | |
94 | attr->tracefile_count); | |
95 | if (ret) { | |
96 | goto end; | |
97 | } | |
98 | ||
99 | ret = config_writer_write_element_unsigned_int(writer, | |
100 | config_element_live_timer_interval, | |
101 | attr->live_timer_interval); | |
102 | if (ret) { | |
103 | goto end; | |
104 | } | |
105 | end: | |
106 | return ret ? LTTNG_ERR_SAVE_IO_FAIL : 0; | |
107 | } | |
108 | ||
109 | static | |
110 | int save_ust_channel_attributes(struct config_writer *writer, | |
111 | struct lttng_ust_channel_attr *attr) | |
112 | { | |
113 | int ret; | |
114 | ||
115 | ret = config_writer_write_element_string(writer, | |
116 | config_element_overwrite_mode, | |
117 | attr->overwrite ? config_overwrite_mode_overwrite : | |
118 | config_overwrite_mode_discard); | |
119 | if (ret) { | |
120 | goto end; | |
121 | } | |
122 | ||
123 | ret = config_writer_write_element_unsigned_int(writer, | |
124 | config_element_subbuf_size, attr->subbuf_size); | |
125 | if (ret) { | |
126 | goto end; | |
127 | } | |
128 | ||
129 | ret = config_writer_write_element_unsigned_int(writer, | |
130 | config_element_num_subbuf, | |
131 | attr->num_subbuf); | |
132 | if (ret) { | |
133 | goto end; | |
134 | } | |
135 | ||
136 | ret = config_writer_write_element_unsigned_int(writer, | |
137 | config_element_switch_timer_interval, | |
138 | attr->switch_timer_interval); | |
139 | if (ret) { | |
140 | goto end; | |
141 | } | |
142 | ||
143 | ret = config_writer_write_element_unsigned_int(writer, | |
144 | config_element_read_timer_interval, | |
145 | attr->read_timer_interval); | |
146 | if (ret) { | |
147 | goto end; | |
148 | } | |
149 | ||
150 | ret = config_writer_write_element_string(writer, | |
151 | config_element_output_type, | |
152 | attr->output == LTTNG_UST_MMAP ? | |
153 | config_output_type_mmap : config_output_type_splice); | |
154 | if (ret) { | |
155 | goto end; | |
156 | } | |
157 | end: | |
158 | return ret ? LTTNG_ERR_SAVE_IO_FAIL : 0; | |
159 | } | |
160 | ||
161 | static | |
162 | const char *get_kernel_instrumentation_string( | |
163 | enum lttng_kernel_instrumentation instrumentation) | |
164 | { | |
165 | const char *instrumentation_string; | |
166 | ||
167 | switch (instrumentation) { | |
168 | case LTTNG_KERNEL_ALL: | |
169 | instrumentation_string = config_event_type_all; | |
170 | break; | |
171 | case LTTNG_KERNEL_TRACEPOINT: | |
172 | instrumentation_string = config_event_type_tracepoint; | |
173 | break; | |
174 | case LTTNG_KERNEL_KPROBE: | |
175 | instrumentation_string = config_event_type_kprobe; | |
176 | break; | |
177 | case LTTNG_KERNEL_FUNCTION: | |
178 | instrumentation_string = config_event_type_function; | |
179 | break; | |
180 | case LTTNG_KERNEL_KRETPROBE: | |
181 | instrumentation_string = config_event_type_kretprobe; | |
182 | break; | |
183 | case LTTNG_KERNEL_NOOP: | |
184 | instrumentation_string = config_event_type_noop; | |
185 | break; | |
186 | case LTTNG_KERNEL_SYSCALL: | |
187 | instrumentation_string = config_event_type_syscall; | |
188 | break; | |
189 | default: | |
190 | instrumentation_string = NULL; | |
191 | } | |
192 | ||
193 | return instrumentation_string; | |
194 | } | |
195 | ||
196 | static | |
197 | const char *get_kernel_context_type_string( | |
198 | enum lttng_kernel_context_type context_type) | |
199 | { | |
200 | const char *context_type_string; | |
201 | ||
202 | switch (context_type) { | |
203 | case LTTNG_KERNEL_CONTEXT_PID: | |
204 | context_type_string = config_event_context_pid; | |
205 | break; | |
206 | case LTTNG_KERNEL_CONTEXT_PROCNAME: | |
207 | context_type_string = config_event_context_procname; | |
208 | break; | |
209 | case LTTNG_KERNEL_CONTEXT_PRIO: | |
210 | context_type_string = config_event_context_prio; | |
211 | break; | |
212 | case LTTNG_KERNEL_CONTEXT_NICE: | |
213 | context_type_string = config_event_context_nice; | |
214 | break; | |
215 | case LTTNG_KERNEL_CONTEXT_VPID: | |
216 | context_type_string = config_event_context_vpid; | |
217 | break; | |
218 | case LTTNG_KERNEL_CONTEXT_TID: | |
219 | context_type_string = config_event_context_tid; | |
220 | break; | |
221 | case LTTNG_KERNEL_CONTEXT_VTID: | |
222 | context_type_string = config_event_context_vtid; | |
223 | break; | |
224 | case LTTNG_KERNEL_CONTEXT_PPID: | |
225 | context_type_string = config_event_context_ppid; | |
226 | break; | |
227 | case LTTNG_KERNEL_CONTEXT_VPPID: | |
228 | context_type_string = config_event_context_vppid; | |
229 | break; | |
230 | case LTTNG_KERNEL_CONTEXT_HOSTNAME: | |
231 | context_type_string = config_event_context_hostname; | |
232 | break; | |
233 | default: | |
234 | context_type_string = NULL; | |
235 | } | |
236 | ||
237 | return context_type_string; | |
238 | } | |
239 | ||
240 | static | |
241 | const char *get_ust_context_type_string( | |
242 | enum lttng_ust_context_type context_type) | |
243 | { | |
244 | const char *context_type_string; | |
245 | ||
246 | switch (context_type) { | |
247 | case LTTNG_UST_CONTEXT_PROCNAME: | |
248 | context_type_string = config_event_context_procname; | |
249 | break; | |
250 | case LTTNG_UST_CONTEXT_VPID: | |
251 | context_type_string = config_event_context_vpid; | |
252 | break; | |
253 | case LTTNG_UST_CONTEXT_VTID: | |
254 | context_type_string = config_event_context_vtid; | |
255 | break; | |
256 | case LTTNG_UST_CONTEXT_IP: | |
257 | context_type_string = config_event_context_ip; | |
258 | break; | |
259 | case LTTNG_UST_CONTEXT_PTHREAD_ID: | |
260 | context_type_string = config_event_context_pthread_id; | |
261 | break; | |
e885a367 JRJ |
262 | case LTTNG_UST_CONTEXT_PERF_THREAD_COUNTER: |
263 | context_type_string = config_event_context_perf_thread_counter; | |
264 | break; | |
fb198a11 JG |
265 | default: |
266 | context_type_string = NULL; | |
e885a367 | 267 | break; |
fb198a11 JG |
268 | } |
269 | ||
270 | return context_type_string; | |
271 | } | |
272 | ||
273 | static | |
274 | const char *get_buffer_type_string( | |
275 | enum lttng_buffer_type buffer_type) | |
276 | { | |
277 | const char *buffer_type_string; | |
278 | ||
279 | switch (buffer_type) { | |
280 | case LTTNG_BUFFER_PER_PID: | |
281 | buffer_type_string = config_buffer_type_per_pid; | |
282 | break; | |
283 | case LTTNG_BUFFER_PER_UID: | |
284 | buffer_type_string = config_buffer_type_per_uid; | |
285 | break; | |
286 | case LTTNG_BUFFER_GLOBAL: | |
287 | buffer_type_string = config_buffer_type_global; | |
288 | break; | |
289 | default: | |
290 | buffer_type_string = NULL; | |
291 | } | |
292 | ||
293 | return buffer_type_string; | |
294 | } | |
295 | ||
296 | static | |
297 | const char *get_loglevel_type_string( | |
298 | enum lttng_ust_loglevel_type loglevel_type) | |
299 | { | |
300 | const char *loglevel_type_string; | |
301 | ||
302 | switch (loglevel_type) { | |
303 | case LTTNG_UST_LOGLEVEL_ALL: | |
304 | loglevel_type_string = config_loglevel_type_all; | |
305 | break; | |
306 | case LTTNG_UST_LOGLEVEL_RANGE: | |
307 | loglevel_type_string = config_loglevel_type_range; | |
308 | break; | |
309 | case LTTNG_UST_LOGLEVEL_SINGLE: | |
310 | loglevel_type_string = config_loglevel_type_single; | |
311 | break; | |
312 | default: | |
313 | loglevel_type_string = NULL; | |
314 | } | |
315 | ||
316 | return loglevel_type_string; | |
317 | } | |
318 | ||
319 | static | |
320 | int save_kernel_event(struct config_writer *writer, | |
321 | struct ltt_kernel_event *event) | |
322 | { | |
323 | int ret; | |
324 | const char *instrumentation_type; | |
325 | ||
326 | ret = config_writer_open_element(writer, config_element_event); | |
327 | if (ret) { | |
328 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
329 | goto end; | |
330 | } | |
331 | ||
332 | if (event->event->name[0]) { | |
333 | ret = config_writer_write_element_string(writer, | |
334 | config_element_name, event->event->name); | |
335 | if (ret) { | |
336 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
337 | goto end; | |
338 | } | |
339 | } | |
340 | ||
341 | ret = config_writer_write_element_bool(writer, config_element_enabled, | |
342 | event->enabled); | |
343 | if (ret) { | |
344 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
345 | goto end; | |
346 | } | |
347 | ||
348 | instrumentation_type = get_kernel_instrumentation_string( | |
349 | event->event->instrumentation); | |
350 | if (!instrumentation_type) { | |
351 | ret = LTTNG_ERR_INVALID; | |
352 | goto end; | |
353 | } | |
354 | ||
355 | ret = config_writer_write_element_string(writer, config_element_type, | |
356 | instrumentation_type); | |
357 | if (ret) { | |
358 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
359 | goto end; | |
360 | } | |
361 | ||
362 | if (event->event->instrumentation == LTTNG_KERNEL_FUNCTION || | |
363 | event->event->instrumentation == LTTNG_KERNEL_KPROBE || | |
364 | event->event->instrumentation == LTTNG_KERNEL_KRETPROBE) { | |
365 | ||
366 | ret = config_writer_open_element(writer, | |
367 | config_element_attributes); | |
368 | if (ret) { | |
369 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
370 | goto end; | |
371 | } | |
372 | ||
373 | switch (event->event->instrumentation) { | |
0de3eda1 | 374 | case LTTNG_KERNEL_SYSCALL: |
fb198a11 JG |
375 | case LTTNG_KERNEL_FUNCTION: |
376 | ret = config_writer_open_element(writer, | |
377 | config_element_function_attributes); | |
378 | if (ret) { | |
379 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
380 | goto end; | |
381 | } | |
382 | ||
383 | ret = config_writer_write_element_string(writer, | |
384 | config_element_name, | |
385 | event->event->u.ftrace.symbol_name); | |
386 | if (ret) { | |
387 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
388 | goto end; | |
389 | } | |
390 | ||
391 | /* /function attributes */ | |
392 | ret = config_writer_close_element(writer); | |
393 | if (ret) { | |
394 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
395 | goto end; | |
396 | } | |
397 | break; | |
398 | case LTTNG_KERNEL_KPROBE: | |
399 | case LTTNG_KERNEL_KRETPROBE: | |
400 | { | |
401 | const char *symbol_name; | |
402 | uint64_t addr; | |
403 | uint64_t offset; | |
404 | ||
405 | if (event->event->instrumentation == | |
406 | LTTNG_KERNEL_KPROBE) { | |
407 | /* | |
408 | * Comments in lttng-kernel.h mention that | |
409 | * either addr or symbol_name are set, not both. | |
410 | */ | |
411 | addr = event->event->u.kprobe.addr; | |
412 | offset = event->event->u.kprobe.offset; | |
413 | symbol_name = addr ? NULL : | |
414 | event->event->u.kprobe.symbol_name; | |
415 | } else { | |
416 | symbol_name = | |
417 | event->event->u.kretprobe.symbol_name; | |
418 | addr = event->event->u.kretprobe.addr; | |
419 | offset = event->event->u.kretprobe.offset; | |
420 | } | |
421 | ||
422 | ret = config_writer_open_element(writer, | |
423 | config_element_probe_attributes); | |
424 | if (ret) { | |
425 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
426 | goto end; | |
427 | } | |
428 | ||
429 | if (symbol_name) { | |
430 | ret = config_writer_write_element_string(writer, | |
431 | config_element_symbol_name, | |
432 | symbol_name); | |
433 | if (ret) { | |
434 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
435 | goto end; | |
436 | } | |
437 | } | |
438 | ||
439 | if (addr) { | |
440 | ret = config_writer_write_element_unsigned_int( | |
441 | writer, config_element_address, addr); | |
442 | if (ret) { | |
443 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
444 | goto end; | |
445 | } | |
446 | } | |
447 | ||
448 | if (offset) { | |
449 | ret = config_writer_write_element_unsigned_int( | |
450 | writer, config_element_offset, offset); | |
451 | if (ret) { | |
452 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
453 | goto end; | |
454 | } | |
455 | } | |
456 | ||
457 | ret = config_writer_close_element(writer); | |
458 | if (ret) { | |
459 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
460 | goto end; | |
461 | } | |
462 | break; | |
463 | } | |
464 | default: | |
465 | ERR("Unsupported kernel instrumentation type."); | |
466 | ret = LTTNG_ERR_INVALID; | |
467 | goto end; | |
468 | } | |
469 | ||
470 | /* /attributes */ | |
471 | ret = config_writer_close_element(writer); | |
472 | if (ret) { | |
473 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
474 | goto end; | |
475 | } | |
476 | } | |
477 | ||
478 | /* /event */ | |
479 | ret = config_writer_close_element(writer); | |
480 | if (ret) { | |
481 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
482 | goto end; | |
483 | } | |
484 | end: | |
485 | return ret; | |
486 | } | |
487 | ||
0de3eda1 DG |
488 | static |
489 | int save_kernel_syscall(struct config_writer *writer, | |
490 | struct ltt_kernel_channel *kchan) | |
491 | { | |
492 | int ret, i; | |
493 | ssize_t count; | |
494 | struct lttng_event *events = NULL; | |
495 | ||
496 | assert(writer); | |
497 | assert(kchan); | |
498 | ||
499 | count = syscall_list_channel(kchan, &events, 0); | |
500 | if (!count) { | |
501 | /* No syscalls, just gracefully return. */ | |
502 | ret = 0; | |
503 | goto end; | |
504 | } | |
505 | ||
506 | for (i = 0; i < count; i++) { | |
507 | struct ltt_kernel_event *kevent; | |
508 | ||
509 | /* Create a temporary kevent in order to save it. */ | |
510 | kevent = trace_kernel_create_event(&events[i]); | |
511 | if (!kevent) { | |
512 | ret = -ENOMEM; | |
513 | goto end; | |
514 | } | |
515 | /* Init list in order so the destroy call can del the node. */ | |
516 | CDS_INIT_LIST_HEAD(&kevent->list); | |
517 | ||
518 | ret = save_kernel_event(writer, kevent); | |
519 | trace_kernel_destroy_event(kevent); | |
520 | if (ret) { | |
521 | goto end; | |
522 | } | |
523 | } | |
524 | ||
525 | /* Everything went well */ | |
526 | ret = 0; | |
527 | ||
528 | end: | |
529 | free(events); | |
530 | return ret; | |
531 | } | |
532 | ||
fb198a11 JG |
533 | static |
534 | int save_kernel_events(struct config_writer *writer, | |
0de3eda1 | 535 | struct ltt_kernel_channel *kchan) |
fb198a11 JG |
536 | { |
537 | int ret; | |
538 | struct ltt_kernel_event *event; | |
539 | ||
540 | ret = config_writer_open_element(writer, config_element_events); | |
541 | if (ret) { | |
542 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
543 | goto end; | |
544 | } | |
545 | ||
0de3eda1 | 546 | cds_list_for_each_entry(event, &kchan->events_list.head, list) { |
fb198a11 JG |
547 | ret = save_kernel_event(writer, event); |
548 | if (ret) { | |
549 | goto end; | |
550 | } | |
551 | } | |
552 | ||
0de3eda1 DG |
553 | /* Save syscalls if any. */ |
554 | ret = save_kernel_syscall(writer, kchan); | |
555 | if (ret) { | |
556 | goto end; | |
557 | } | |
558 | ||
fb198a11 JG |
559 | /* /events */ |
560 | ret = config_writer_close_element(writer); | |
561 | if (ret) { | |
562 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
563 | goto end; | |
564 | } | |
565 | end: | |
566 | return ret; | |
567 | } | |
568 | ||
569 | static | |
570 | int save_ust_event(struct config_writer *writer, | |
571 | struct ltt_ust_event *event) | |
572 | { | |
573 | int ret; | |
574 | const char *loglevel_type_string; | |
575 | ||
576 | ret = config_writer_open_element(writer, config_element_event); | |
577 | if (ret) { | |
578 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
579 | goto end; | |
580 | } | |
581 | ||
582 | if (event->attr.name[0]) { | |
583 | ret = config_writer_write_element_string(writer, | |
584 | config_element_name, event->attr.name); | |
585 | if (ret) { | |
586 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
587 | goto end; | |
588 | } | |
589 | } | |
590 | ||
591 | ret = config_writer_write_element_bool(writer, config_element_enabled, | |
592 | event->enabled); | |
593 | if (ret) { | |
594 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
595 | goto end; | |
596 | } | |
597 | ||
598 | if (event->attr.instrumentation != LTTNG_UST_TRACEPOINT) { | |
599 | ERR("Unsupported UST instrumentation type."); | |
600 | ret = LTTNG_ERR_INVALID; | |
601 | goto end; | |
602 | } | |
603 | ret = config_writer_write_element_string(writer, config_element_type, | |
604 | config_event_type_tracepoint); | |
605 | if (ret) { | |
606 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
607 | goto end; | |
608 | } | |
609 | ||
610 | loglevel_type_string = get_loglevel_type_string( | |
611 | event->attr.loglevel_type); | |
612 | if (!loglevel_type_string) { | |
613 | ERR("Unsupported UST loglevel type."); | |
614 | ret = LTTNG_ERR_INVALID; | |
615 | goto end; | |
616 | } | |
617 | ||
618 | ret = config_writer_write_element_string(writer, | |
619 | config_element_loglevel_type, loglevel_type_string); | |
620 | if (ret) { | |
621 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
622 | goto end; | |
623 | } | |
624 | ||
625 | ret = config_writer_write_element_signed_int(writer, | |
626 | config_element_loglevel, event->attr.loglevel); | |
627 | if (ret) { | |
628 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
629 | goto end; | |
630 | } | |
631 | ||
632 | if (event->filter_expression) { | |
633 | ret = config_writer_write_element_string(writer, | |
634 | config_element_filter, event->filter_expression); | |
635 | if (ret) { | |
636 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
637 | goto end; | |
638 | } | |
639 | } | |
640 | ||
641 | if (event->exclusion && event->exclusion->count) { | |
642 | uint32_t i; | |
643 | ||
644 | ret = config_writer_open_element(writer, | |
645 | config_element_exclusions); | |
646 | if (ret) { | |
647 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
648 | goto end; | |
649 | } | |
650 | ||
651 | for (i = 0; i < event->exclusion->count; i++) { | |
652 | ret = config_writer_write_element_string(writer, | |
653 | config_element_exclusion, | |
654 | &event->exclusion->names[0][i]); | |
655 | if (ret) { | |
656 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
657 | goto end; | |
658 | } | |
659 | } | |
660 | ||
661 | /* /exclusions */ | |
662 | ret = config_writer_close_element(writer); | |
663 | if (ret) { | |
664 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
665 | goto end; | |
666 | } | |
667 | } | |
668 | ||
669 | /* /event */ | |
670 | ret = config_writer_close_element(writer); | |
671 | if (ret) { | |
672 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
673 | goto end; | |
674 | } | |
675 | end: | |
676 | return ret; | |
677 | } | |
678 | ||
679 | static | |
680 | int save_ust_events(struct config_writer *writer, | |
681 | struct lttng_ht *events) | |
682 | { | |
683 | int ret; | |
684 | struct ltt_ust_event *event; | |
685 | struct lttng_ht_node_str *node; | |
686 | struct lttng_ht_iter iter; | |
687 | ||
688 | ret = config_writer_open_element(writer, config_element_events); | |
689 | if (ret) { | |
690 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
691 | goto end; | |
692 | } | |
693 | ||
694 | rcu_read_lock(); | |
695 | cds_lfht_for_each_entry(events->ht, &iter.iter, node, node) { | |
696 | event = caa_container_of(node, struct ltt_ust_event, node); | |
697 | ||
698 | ret = save_ust_event(writer, event); | |
699 | if (ret) { | |
700 | rcu_read_unlock(); | |
701 | goto end; | |
702 | } | |
703 | } | |
704 | rcu_read_unlock(); | |
705 | ||
706 | /* /events */ | |
707 | ret = config_writer_close_element(writer); | |
708 | if (ret) { | |
709 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
710 | goto end; | |
711 | } | |
712 | end: | |
713 | return ret; | |
714 | } | |
715 | ||
716 | static | |
717 | int save_kernel_context(struct config_writer *writer, | |
718 | struct lttng_kernel_context *ctx) | |
719 | { | |
720 | int ret = 0; | |
721 | ||
722 | if (!ctx) { | |
723 | goto end; | |
724 | } | |
725 | ||
fb198a11 JG |
726 | ret = config_writer_open_element(writer, config_element_context); |
727 | if (ret) { | |
728 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
729 | goto end; | |
730 | } | |
731 | ||
cba45eda | 732 | if (ctx->ctx == LTTNG_KERNEL_CONTEXT_PERF_CPU_COUNTER) { |
fb198a11 JG |
733 | ret = config_writer_open_element(writer, config_element_perf); |
734 | if (ret) { | |
735 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
736 | goto end; | |
737 | } | |
738 | ||
739 | ret = config_writer_write_element_unsigned_int(writer, | |
740 | config_element_type, ctx->u.perf_counter.type); | |
741 | if (ret) { | |
742 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
743 | goto end; | |
744 | } | |
745 | ||
746 | ret = config_writer_write_element_unsigned_int(writer, | |
747 | config_element_config, ctx->u.perf_counter.config); | |
748 | if (ret) { | |
749 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
750 | goto end; | |
751 | } | |
752 | ||
753 | ret = config_writer_write_element_string(writer, | |
754 | config_element_name, ctx->u.perf_counter.name); | |
755 | if (ret) { | |
756 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
757 | goto end; | |
758 | } | |
759 | ||
760 | /* /perf */ | |
761 | ret = config_writer_close_element(writer); | |
762 | if (ret) { | |
763 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
764 | goto end; | |
765 | } | |
766 | } else { | |
767 | const char *context_type_string = | |
768 | get_kernel_context_type_string(ctx->ctx); | |
769 | ||
770 | if (!context_type_string) { | |
771 | ERR("Unsupported kernel context type."); | |
772 | ret = LTTNG_ERR_INVALID; | |
773 | goto end; | |
774 | } | |
775 | ||
776 | ret = config_writer_write_element_string(writer, | |
777 | config_element_type, context_type_string); | |
778 | if (ret) { | |
779 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
780 | goto end; | |
781 | } | |
782 | } | |
783 | ||
784 | /* /context */ | |
785 | ret = config_writer_close_element(writer); | |
786 | if (ret) { | |
787 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
788 | goto end; | |
789 | } | |
790 | ||
645328ae DG |
791 | end: |
792 | return ret; | |
793 | } | |
794 | ||
795 | static | |
796 | int save_kernel_contexts(struct config_writer *writer, | |
797 | struct ltt_kernel_channel *kchan) | |
798 | { | |
799 | int ret; | |
800 | struct ltt_kernel_context *ctx; | |
801 | ||
802 | ret = config_writer_open_element(writer, config_element_contexts); | |
803 | if (ret) { | |
804 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
805 | goto end; | |
806 | } | |
807 | ||
808 | cds_list_for_each_entry(ctx, &kchan->ctx_list, list) { | |
809 | ret = save_kernel_context(writer, &ctx->ctx); | |
810 | if (ret) { | |
811 | goto end; | |
812 | } | |
813 | } | |
814 | ||
fb198a11 JG |
815 | /* /contexts */ |
816 | ret = config_writer_close_element(writer); | |
817 | if (ret) { | |
818 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
819 | goto end; | |
820 | } | |
821 | end: | |
822 | return ret; | |
823 | } | |
824 | ||
825 | static | |
826 | int save_ust_context(struct config_writer *writer, | |
827 | struct cds_list_head *ctx_list) | |
828 | { | |
829 | int ret; | |
830 | struct ltt_ust_context *ctx; | |
831 | ||
832 | assert(writer); | |
833 | assert(ctx_list); | |
834 | ||
835 | ret = config_writer_open_element(writer, config_element_contexts); | |
836 | if (ret) { | |
837 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
838 | goto end; | |
839 | } | |
840 | ||
841 | cds_list_for_each_entry(ctx, ctx_list, list) { | |
842 | const char *context_type_string; | |
843 | ||
844 | context_type_string = get_ust_context_type_string(ctx->ctx.ctx); | |
845 | if (!context_type_string) { | |
846 | ERR("Unsupported UST context type.") | |
847 | ret = LTTNG_ERR_INVALID; | |
848 | goto end; | |
849 | } | |
850 | ||
851 | ret = config_writer_open_element(writer, | |
852 | config_element_context); | |
853 | if (ret) { | |
854 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
855 | goto end; | |
856 | } | |
857 | ||
858 | ret = config_writer_write_element_string(writer, | |
859 | config_element_type, context_type_string); | |
860 | if (ret) { | |
861 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
862 | goto end; | |
863 | } | |
864 | ||
865 | /* /context */ | |
866 | ret = config_writer_close_element(writer); | |
867 | if (ret) { | |
868 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
869 | goto end; | |
870 | } | |
871 | } | |
872 | ||
873 | /* /contexts */ | |
874 | ret = config_writer_close_element(writer); | |
875 | if (ret) { | |
876 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
877 | goto end; | |
878 | } | |
879 | end: | |
880 | return ret; | |
881 | } | |
882 | ||
883 | static | |
884 | int save_kernel_channel(struct config_writer *writer, | |
885 | struct ltt_kernel_channel *kchan) | |
886 | { | |
887 | int ret; | |
888 | ||
889 | assert(writer); | |
890 | assert(kchan); | |
891 | ||
892 | ret = config_writer_open_element(writer, config_element_channel); | |
893 | if (ret) { | |
894 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
895 | goto end; | |
896 | } | |
897 | ||
898 | ret = config_writer_write_element_string(writer, config_element_name, | |
899 | kchan->channel->name); | |
900 | if (ret) { | |
901 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
902 | goto end; | |
903 | } | |
904 | ||
905 | ret = config_writer_write_element_bool(writer, config_element_enabled, | |
906 | kchan->channel->enabled); | |
907 | if (ret) { | |
908 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
909 | goto end; | |
910 | } | |
911 | ||
912 | ret = save_kernel_channel_attributes(writer, &kchan->channel->attr); | |
913 | if (ret) { | |
914 | goto end; | |
915 | } | |
916 | ||
0de3eda1 | 917 | ret = save_kernel_events(writer, kchan); |
fb198a11 JG |
918 | if (ret) { |
919 | goto end; | |
920 | } | |
921 | ||
645328ae | 922 | ret = save_kernel_contexts(writer, kchan); |
fb198a11 JG |
923 | if (ret) { |
924 | goto end; | |
925 | } | |
926 | ||
927 | /* /channel */ | |
928 | ret = config_writer_close_element(writer); | |
929 | if (ret) { | |
930 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
931 | goto end; | |
932 | } | |
933 | end: | |
934 | return ret; | |
935 | } | |
936 | ||
937 | static | |
938 | int save_ust_channel(struct config_writer *writer, | |
939 | struct ltt_ust_channel *ust_chan, | |
940 | struct ltt_ust_session *session) | |
941 | { | |
942 | int ret; | |
943 | ||
944 | assert(writer); | |
945 | assert(ust_chan); | |
946 | assert(session); | |
947 | ||
948 | ret = config_writer_open_element(writer, config_element_channel); | |
949 | if (ret) { | |
950 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
951 | goto end; | |
952 | } | |
953 | ||
954 | ret = config_writer_write_element_string(writer, config_element_name, | |
955 | ust_chan->name); | |
956 | if (ret) { | |
957 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
958 | goto end; | |
959 | } | |
960 | ||
961 | ret = config_writer_write_element_bool(writer, config_element_enabled, | |
962 | ust_chan->enabled); | |
963 | if (ret) { | |
964 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
965 | goto end; | |
966 | } | |
967 | ||
968 | ret = save_ust_channel_attributes(writer, &ust_chan->attr); | |
969 | if (ret) { | |
970 | goto end; | |
971 | } | |
972 | ||
973 | ret = config_writer_write_element_unsigned_int(writer, | |
974 | config_element_tracefile_size, ust_chan->tracefile_size); | |
975 | if (ret) { | |
976 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
977 | goto end; | |
978 | } | |
979 | ||
980 | ret = config_writer_write_element_unsigned_int(writer, | |
981 | config_element_tracefile_count, ust_chan->tracefile_count); | |
982 | if (ret) { | |
983 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
984 | goto end; | |
985 | } | |
986 | ||
987 | ret = config_writer_write_element_unsigned_int(writer, | |
988 | config_element_live_timer_interval, | |
989 | session->live_timer_interval); | |
990 | if (ret) { | |
991 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
992 | goto end; | |
993 | } | |
994 | ||
995 | ret = save_ust_events(writer, ust_chan->events); | |
996 | if (ret) { | |
997 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
998 | goto end; | |
999 | } | |
1000 | ||
1001 | ret = save_ust_context(writer, &ust_chan->ctx_list); | |
1002 | if (ret) { | |
1003 | goto end; | |
1004 | } | |
1005 | ||
1006 | /* /channel */ | |
1007 | ret = config_writer_close_element(writer); | |
1008 | if (ret) { | |
1009 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1010 | goto end; | |
1011 | } | |
1012 | end: | |
1013 | return ret; | |
1014 | } | |
1015 | ||
1016 | static | |
1017 | int save_kernel_session(struct config_writer *writer, | |
1018 | struct ltt_session *session) | |
1019 | { | |
1020 | int ret; | |
1021 | struct ltt_kernel_channel *kchan; | |
1022 | ||
1023 | assert(writer); | |
1024 | assert(session); | |
1025 | ||
1026 | ret = config_writer_write_element_string(writer, config_element_type, | |
1027 | config_domain_type_kernel); | |
1028 | if (ret) { | |
1029 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1030 | goto end; | |
1031 | } | |
1032 | ||
1033 | ret = config_writer_write_element_string(writer, | |
1034 | config_element_buffer_type, config_buffer_type_global); | |
1035 | if (ret) { | |
1036 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1037 | goto end; | |
1038 | } | |
1039 | ||
1040 | ret = config_writer_open_element(writer, | |
1041 | config_element_channels); | |
1042 | if (ret) { | |
1043 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1044 | goto end; | |
1045 | } | |
1046 | ||
1047 | cds_list_for_each_entry(kchan, &session->kernel_session->channel_list.head, | |
1048 | list) { | |
1049 | ret = save_kernel_channel(writer, kchan); | |
1050 | if (ret) { | |
1051 | goto end; | |
1052 | } | |
1053 | } | |
1054 | ||
1055 | /* /channels */ | |
1056 | ret = config_writer_close_element(writer); | |
1057 | if (ret) { | |
1058 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1059 | goto end; | |
1060 | } | |
1061 | end: | |
1062 | return ret; | |
1063 | } | |
1064 | ||
1065 | static | |
1066 | int save_ust_session(struct config_writer *writer, | |
022d91ba | 1067 | struct ltt_session *session, int save_agent) |
fb198a11 JG |
1068 | { |
1069 | int ret; | |
1070 | struct ltt_ust_channel *ust_chan; | |
1071 | const char *buffer_type_string; | |
1072 | struct lttng_ht_node_str *node; | |
1073 | struct lttng_ht_iter iter; | |
1074 | ||
1075 | assert(writer); | |
1076 | assert(session); | |
1077 | ||
1078 | ret = config_writer_write_element_string(writer, config_element_type, | |
022d91ba | 1079 | save_agent ? config_domain_type_jul : config_domain_type_ust); |
fb198a11 JG |
1080 | if (ret) { |
1081 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1082 | goto end; | |
1083 | } | |
1084 | ||
1085 | buffer_type_string = get_buffer_type_string( | |
1086 | session->ust_session->buffer_type); | |
1087 | if (!buffer_type_string) { | |
1088 | ERR("Unsupported buffer type."); | |
1089 | ret = LTTNG_ERR_INVALID; | |
1090 | goto end; | |
1091 | } | |
1092 | ||
1093 | ret = config_writer_write_element_string(writer, | |
1094 | config_element_buffer_type, buffer_type_string); | |
1095 | if (ret) { | |
1096 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1097 | goto end; | |
1098 | } | |
1099 | ||
1100 | ret = config_writer_open_element(writer, config_element_channels); | |
1101 | if (ret) { | |
1102 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1103 | goto end; | |
1104 | } | |
1105 | ||
1106 | rcu_read_lock(); | |
1107 | cds_lfht_for_each_entry(session->ust_session->domain_global.channels->ht, | |
1108 | &iter.iter, node, node) { | |
022d91ba | 1109 | int agent_channel; |
fb198a11 JG |
1110 | |
1111 | ust_chan = caa_container_of(node, struct ltt_ust_channel, node); | |
da6c3a50 DG |
1112 | agent_channel = !strcmp(DEFAULT_JUL_CHANNEL_NAME, ust_chan->name) || |
1113 | !strcmp(DEFAULT_LOG4J_CHANNEL_NAME, ust_chan->name); | |
022d91ba | 1114 | if (!(save_agent ^ agent_channel)) { |
fb198a11 JG |
1115 | ret = save_ust_channel(writer, ust_chan, session->ust_session); |
1116 | if (ret) { | |
1117 | rcu_read_unlock(); | |
1118 | goto end; | |
1119 | } | |
1120 | } | |
1121 | } | |
1122 | rcu_read_unlock(); | |
1123 | ||
1124 | /* /channels */ | |
1125 | ret = config_writer_close_element(writer); | |
1126 | if (ret) { | |
1127 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1128 | goto end; | |
1129 | } | |
1130 | end: | |
1131 | return ret; | |
1132 | } | |
1133 | ||
1134 | static | |
1135 | int save_domains(struct config_writer *writer, struct ltt_session *session) | |
1136 | { | |
1137 | int ret = 0; | |
1138 | ||
1139 | assert(writer); | |
1140 | assert(session); | |
1141 | ||
1142 | if (!session->kernel_session && !session->ust_session) { | |
1143 | goto end; | |
1144 | } | |
1145 | ||
1146 | ret = config_writer_open_element(writer, config_element_domains); | |
1147 | if (ret) { | |
1148 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1149 | goto end; | |
1150 | } | |
1151 | ||
1152 | ||
1153 | if (session->kernel_session) { | |
1154 | ret = config_writer_open_element(writer, | |
1155 | config_element_domain); | |
1156 | if (ret) { | |
1157 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1158 | goto end; | |
1159 | } | |
1160 | ||
1161 | ret = save_kernel_session(writer, session); | |
1162 | if (ret) { | |
1163 | goto end; | |
1164 | } | |
1165 | ||
1166 | /* /domain */ | |
1167 | ret = config_writer_close_element(writer); | |
1168 | if (ret) { | |
1169 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1170 | goto end; | |
1171 | } | |
1172 | } | |
1173 | ||
1174 | if (session->ust_session) { | |
1175 | ret = config_writer_open_element(writer, | |
1176 | config_element_domain); | |
1177 | if (ret) { | |
1178 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1179 | goto end; | |
1180 | } | |
1181 | ||
1182 | ret = save_ust_session(writer, session, 0); | |
1183 | if (ret) { | |
1184 | goto end; | |
1185 | } | |
1186 | ||
1187 | /* /domain */ | |
1188 | ret = config_writer_close_element(writer); | |
1189 | if (ret) { | |
1190 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1191 | goto end; | |
1192 | } | |
1193 | } | |
1194 | ||
1195 | if (session->ust_session && | |
fefd409b | 1196 | lttng_ht_get_count(session->ust_session->agents) > 0) { |
fb198a11 JG |
1197 | ret = config_writer_open_element(writer, |
1198 | config_element_domain); | |
1199 | if (ret) { | |
1200 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1201 | goto end; | |
1202 | } | |
1203 | ||
1204 | ret = save_ust_session(writer, session, 1); | |
1205 | if (ret) { | |
1206 | goto end; | |
1207 | } | |
1208 | ||
1209 | /* /domain */ | |
1210 | ret = config_writer_close_element(writer); | |
1211 | if (ret) { | |
1212 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1213 | goto end; | |
1214 | } | |
1215 | } | |
1216 | ||
1217 | /* /domains */ | |
1218 | ret = config_writer_close_element(writer); | |
1219 | if (ret) { | |
1220 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1221 | goto end; | |
1222 | } | |
1223 | end: | |
1224 | return ret; | |
1225 | } | |
1226 | ||
1227 | static | |
1228 | int save_consumer_output(struct config_writer *writer, | |
1229 | struct consumer_output *output) | |
1230 | { | |
1231 | int ret; | |
1232 | ||
1233 | assert(writer); | |
1234 | assert(output); | |
1235 | ||
1236 | ret = config_writer_open_element(writer, config_element_consumer_output); | |
1237 | if (ret) { | |
1238 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1239 | goto end; | |
1240 | } | |
1241 | ||
1242 | ret = config_writer_write_element_bool(writer, config_element_enabled, | |
1243 | output->enabled); | |
1244 | if (ret) { | |
1245 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1246 | goto end; | |
1247 | } | |
1248 | ||
1249 | ret = config_writer_open_element(writer, config_element_destination); | |
1250 | if (ret) { | |
1251 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1252 | goto end; | |
1253 | } | |
1254 | ||
1255 | switch (output->type) { | |
1256 | case CONSUMER_DST_LOCAL: | |
1257 | ret = config_writer_write_element_string(writer, | |
1258 | config_element_path, output->dst.trace_path); | |
1259 | if (ret) { | |
1260 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1261 | goto end; | |
1262 | } | |
1263 | break; | |
1264 | case CONSUMER_DST_NET: | |
1265 | { | |
1266 | char *uri; | |
1267 | ||
1268 | uri = zmalloc(PATH_MAX); | |
1269 | if (!uri) { | |
1270 | ret = LTTNG_ERR_NOMEM; | |
1271 | goto end; | |
1272 | } | |
1273 | ||
1274 | ret = config_writer_open_element(writer, config_element_net_output); | |
1275 | if (ret) { | |
1276 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1277 | goto end_net_output; | |
1278 | } | |
1279 | ||
1280 | if (output->dst.net.control_isset && | |
1281 | output->dst.net.data_isset) { | |
1282 | ret = uri_to_str_url(&output->dst.net.control, uri, PATH_MAX); | |
1283 | if (ret < 0) { | |
1284 | ret = LTTNG_ERR_INVALID; | |
1285 | goto end_net_output; | |
1286 | } | |
1287 | ||
1288 | ret = config_writer_write_element_string(writer, | |
1289 | config_element_control_uri, uri); | |
1290 | if (ret) { | |
1291 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1292 | goto end_net_output; | |
1293 | } | |
1294 | ||
1295 | ret = uri_to_str_url(&output->dst.net.data, uri, PATH_MAX); | |
1296 | if (ret < 0) { | |
1297 | ret = LTTNG_ERR_INVALID; | |
1298 | goto end_net_output; | |
1299 | } | |
1300 | ||
1301 | ret = config_writer_write_element_string(writer, | |
1302 | config_element_data_uri, uri); | |
1303 | if (ret) { | |
1304 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1305 | goto end_net_output; | |
1306 | } | |
1307 | ||
1308 | end_net_output: | |
1309 | free(uri); | |
1310 | if (ret) { | |
1311 | goto end; | |
1312 | } | |
1313 | } else { | |
1314 | ret = !output->dst.net.control_isset ? | |
1315 | LTTNG_ERR_URL_CTRL_MISS : | |
1316 | LTTNG_ERR_URL_DATA_MISS; | |
c39270e5 | 1317 | free(uri); |
fb198a11 JG |
1318 | goto end; |
1319 | } | |
1320 | ||
1321 | ret = config_writer_close_element(writer); | |
1322 | if (ret) { | |
1323 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1324 | goto end; | |
1325 | } | |
1326 | break; | |
1327 | } | |
1328 | default: | |
1329 | ERR("Unsupported consumer output type."); | |
1330 | ret = LTTNG_ERR_INVALID; | |
1331 | goto end; | |
1332 | } | |
1333 | ||
1334 | /* /destination */ | |
1335 | ret = config_writer_close_element(writer); | |
1336 | if (ret) { | |
1337 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1338 | goto end; | |
1339 | } | |
1340 | ||
1341 | /* /consumer_output */ | |
1342 | ret = config_writer_close_element(writer); | |
1343 | if (ret) { | |
1344 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1345 | goto end; | |
1346 | } | |
1347 | end: | |
1348 | return ret; | |
1349 | } | |
1350 | ||
1351 | static | |
1352 | int save_snapshot_outputs(struct config_writer *writer, | |
1353 | struct snapshot *snapshot) | |
1354 | { | |
1355 | int ret; | |
1356 | struct lttng_ht_iter iter; | |
1357 | struct snapshot_output *output; | |
1358 | ||
1359 | assert(writer); | |
1360 | assert(snapshot); | |
1361 | ||
1362 | ret = config_writer_open_element(writer, config_element_snapshot_outputs); | |
1363 | if (ret) { | |
1364 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1365 | goto end; | |
1366 | } | |
1367 | ||
1368 | rcu_read_lock(); | |
1369 | cds_lfht_for_each_entry(snapshot->output_ht->ht, &iter.iter, output, | |
1370 | node.node) { | |
1371 | ret = config_writer_open_element(writer, | |
1372 | config_element_output); | |
1373 | if (ret) { | |
1374 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1375 | goto end_unlock; | |
1376 | } | |
1377 | ||
1378 | ret = config_writer_write_element_string(writer, | |
1379 | config_element_name, output->name); | |
1380 | if (ret) { | |
1381 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1382 | goto end_unlock; | |
1383 | } | |
1384 | ||
1385 | ret = config_writer_write_element_unsigned_int(writer, | |
1386 | config_element_max_size, output->max_size); | |
1387 | if (ret) { | |
1388 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1389 | goto end_unlock; | |
1390 | } | |
1391 | ||
1392 | ret = save_consumer_output(writer, output->consumer); | |
1393 | if (ret) { | |
1394 | goto end_unlock; | |
1395 | } | |
1396 | ||
1397 | /* /output */ | |
1398 | ret = config_writer_close_element(writer); | |
1399 | if (ret) { | |
1400 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1401 | goto end_unlock; | |
1402 | } | |
1403 | } | |
1404 | rcu_read_unlock(); | |
1405 | ||
1406 | /* /snapshot_outputs */ | |
1407 | ret = config_writer_close_element(writer); | |
1408 | if (ret) { | |
1409 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1410 | goto end; | |
1411 | } | |
1412 | ||
1413 | end: | |
1414 | return ret; | |
1415 | end_unlock: | |
1416 | rcu_read_unlock(); | |
1417 | return ret; | |
1418 | } | |
1419 | ||
1420 | static | |
1421 | int save_session_output(struct config_writer *writer, | |
1422 | struct ltt_session *session) | |
1423 | { | |
1424 | int ret; | |
1425 | ||
1426 | assert(writer); | |
1427 | assert(session); | |
1428 | ||
1429 | if ((session->snapshot_mode && session->snapshot.nb_output == 0) || | |
1430 | (!session->snapshot_mode && !session->consumer)) { | |
1431 | /* Session is in no output mode */ | |
1432 | ret = 0; | |
1433 | goto end; | |
1434 | } | |
1435 | ||
1436 | ret = config_writer_open_element(writer, config_element_output); | |
1437 | if (ret) { | |
1438 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1439 | goto end; | |
1440 | } | |
1441 | ||
1442 | if (session->snapshot_mode) { | |
1443 | ret = save_snapshot_outputs(writer, &session->snapshot); | |
1444 | if (ret) { | |
1445 | goto end; | |
1446 | } | |
1447 | } else { | |
1448 | if (session->consumer) { | |
1449 | ret = save_consumer_output(writer, session->consumer); | |
1450 | if (ret) { | |
1451 | goto end; | |
1452 | } | |
1453 | } | |
1454 | } | |
1455 | ||
1456 | /* /output */ | |
1457 | ret = config_writer_close_element(writer); | |
1458 | if (ret) { | |
1459 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1460 | goto end; | |
1461 | } | |
1462 | end: | |
1463 | return ret; | |
1464 | } | |
1465 | ||
1466 | /* | |
1467 | * Save the given session. | |
1468 | * | |
1469 | * Return 0 on success else a LTTNG_ERR* code. | |
1470 | */ | |
1471 | static | |
1472 | int save_session(struct ltt_session *session, | |
1473 | struct lttng_save_session_attr *attr, lttng_sock_cred *creds) | |
1474 | { | |
1475 | int ret, fd; | |
db471218 | 1476 | unsigned int file_opened = 0; /* Indicate if the file has been opened */ |
fb198a11 JG |
1477 | char config_file_path[PATH_MAX]; |
1478 | size_t len; | |
1479 | struct config_writer *writer = NULL; | |
1480 | size_t session_name_len; | |
1481 | const char *provided_path; | |
1482 | ||
1483 | assert(session); | |
1484 | assert(attr); | |
1485 | assert(creds); | |
1486 | ||
1487 | session_name_len = strlen(session->name); | |
95a29ab8 | 1488 | memset(config_file_path, 0, sizeof(config_file_path)); |
fb198a11 JG |
1489 | |
1490 | if (!session_access_ok(session, | |
1491 | LTTNG_SOCK_GET_UID_CRED(creds), | |
1492 | LTTNG_SOCK_GET_GID_CRED(creds))) { | |
1493 | ret = LTTNG_ERR_EPERM; | |
1494 | goto end; | |
1495 | } | |
1496 | ||
1497 | provided_path = lttng_save_session_attr_get_output_url(attr); | |
1498 | if (provided_path) { | |
95a29ab8 | 1499 | DBG3("Save session in provided path %s", provided_path); |
fb198a11 | 1500 | len = strlen(provided_path); |
d2992717 | 1501 | if (len >= sizeof(config_file_path)) { |
fb198a11 JG |
1502 | ret = LTTNG_ERR_SET_URL; |
1503 | goto end; | |
1504 | } | |
1505 | strncpy(config_file_path, provided_path, len); | |
1506 | } else { | |
7e078ad1 | 1507 | ssize_t ret_len; |
fb198a11 JG |
1508 | char *home_dir = utils_get_user_home_dir( |
1509 | LTTNG_SOCK_GET_UID_CRED(creds)); | |
1510 | if (!home_dir) { | |
1511 | ret = LTTNG_ERR_SET_URL; | |
1512 | goto end; | |
1513 | } | |
1514 | ||
d2992717 | 1515 | ret_len = snprintf(config_file_path, sizeof(config_file_path), |
fb198a11 JG |
1516 | DEFAULT_SESSION_HOME_CONFIGPATH, home_dir); |
1517 | free(home_dir); | |
7e078ad1 | 1518 | if (ret_len < 0) { |
fb198a11 JG |
1519 | PERROR("snprintf save session"); |
1520 | ret = LTTNG_ERR_SET_URL; | |
1521 | goto end; | |
1522 | } | |
7e078ad1 | 1523 | len = ret_len; |
fb198a11 JG |
1524 | } |
1525 | ||
1526 | /* | |
d2992717 DG |
1527 | * Check the path fits in the config file path dst including the '/' |
1528 | * followed by trailing .lttng extension and the NULL terminated string. | |
fb198a11 | 1529 | */ |
d2992717 DG |
1530 | if ((len + session_name_len + 2 + |
1531 | sizeof(DEFAULT_SESSION_CONFIG_FILE_EXTENSION)) | |
1532 | > sizeof(config_file_path)) { | |
fb198a11 JG |
1533 | ret = LTTNG_ERR_SET_URL; |
1534 | goto end; | |
1535 | } | |
1536 | ||
1537 | ret = run_as_mkdir_recursive(config_file_path, S_IRWXU | S_IRWXG, | |
1538 | LTTNG_SOCK_GET_UID_CRED(creds), LTTNG_SOCK_GET_GID_CRED(creds)); | |
1539 | if (ret) { | |
1540 | ret = LTTNG_ERR_SET_URL; | |
1541 | goto end; | |
1542 | } | |
1543 | ||
d2992717 DG |
1544 | /* |
1545 | * At this point, we know that everything fits in the buffer. Validation | |
1546 | * was done just above. | |
1547 | */ | |
fb198a11 JG |
1548 | config_file_path[len++] = '/'; |
1549 | strncpy(config_file_path + len, session->name, session_name_len); | |
1550 | len += session_name_len; | |
1551 | strcpy(config_file_path + len, DEFAULT_SESSION_CONFIG_FILE_EXTENSION); | |
95a29ab8 DG |
1552 | len += sizeof(DEFAULT_SESSION_CONFIG_FILE_EXTENSION); |
1553 | config_file_path[len] = '\0'; | |
fb198a11 JG |
1554 | |
1555 | if (!access(config_file_path, F_OK) && !attr->overwrite) { | |
f9b57ab2 DG |
1556 | /* File exists, notify the user since the overwrite flag is off. */ |
1557 | ret = LTTNG_ERR_SAVE_FILE_EXIST; | |
fb198a11 JG |
1558 | goto end; |
1559 | } | |
1560 | ||
1561 | fd = run_as_open(config_file_path, O_CREAT | O_WRONLY | O_TRUNC, | |
1562 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP, | |
1563 | LTTNG_SOCK_GET_UID_CRED(creds), LTTNG_SOCK_GET_GID_CRED(creds)); | |
1564 | if (fd < 0) { | |
1565 | PERROR("Could not create configuration file"); | |
1566 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1567 | goto end; | |
1568 | } | |
db471218 | 1569 | file_opened = 1; |
fb198a11 | 1570 | |
705bb62f | 1571 | writer = config_writer_create(fd, 1); |
fb198a11 JG |
1572 | if (!writer) { |
1573 | ret = LTTNG_ERR_NOMEM; | |
1574 | goto end; | |
1575 | } | |
1576 | ||
1577 | ret = config_writer_open_element(writer, config_element_sessions); | |
1578 | if (ret) { | |
1579 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1580 | goto end; | |
1581 | } | |
1582 | ||
1583 | ret = config_writer_open_element(writer, config_element_session); | |
1584 | if (ret) { | |
1585 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1586 | goto end; | |
1587 | } | |
1588 | ||
1589 | ret = config_writer_write_element_string(writer, config_element_name, | |
1590 | session->name); | |
1591 | if (ret) { | |
1592 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1593 | goto end; | |
1594 | } | |
1595 | ||
1596 | ret = save_domains(writer, session); | |
1597 | if (ret) { | |
1598 | goto end; | |
1599 | } | |
1600 | ||
1601 | ret = config_writer_write_element_bool(writer, config_element_started, | |
8382cf6f | 1602 | session->active); |
fb198a11 JG |
1603 | if (ret) { |
1604 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1605 | goto end; | |
1606 | } | |
1607 | ||
1608 | if (session->snapshot_mode || session->live_timer) { | |
1609 | ret = config_writer_open_element(writer, config_element_attributes); | |
1610 | if (ret) { | |
1611 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1612 | goto end; | |
1613 | } | |
1614 | ||
1615 | if (session->snapshot_mode) { | |
1616 | ret = config_writer_write_element_bool(writer, | |
1617 | config_element_snapshot_mode, 1); | |
1618 | if (ret) { | |
1619 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1620 | goto end; | |
1621 | } | |
1622 | } else { | |
d98ad589 | 1623 | ret = config_writer_write_element_unsigned_int(writer, |
fb198a11 JG |
1624 | config_element_live_timer_interval, session->live_timer); |
1625 | if (ret) { | |
1626 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1627 | goto end; | |
1628 | } | |
1629 | } | |
1630 | ||
1631 | /* /attributes */ | |
1632 | ret = config_writer_close_element(writer); | |
1633 | if (ret) { | |
1634 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1635 | goto end; | |
1636 | } | |
1637 | } | |
1638 | ||
1639 | ret = save_session_output(writer, session); | |
1640 | if (ret) { | |
1641 | goto end; | |
1642 | } | |
1643 | ||
1644 | /* /session */ | |
1645 | ret = config_writer_close_element(writer); | |
1646 | if (ret) { | |
1647 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1648 | goto end; | |
1649 | } | |
1650 | ||
1651 | /* /sessions */ | |
1652 | ret = config_writer_close_element(writer); | |
1653 | if (ret) { | |
1654 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1655 | goto end; | |
1656 | } | |
1657 | end: | |
1658 | if (writer && config_writer_destroy(writer)) { | |
1659 | /* Preserve the original error code */ | |
1660 | ret = ret ? ret : LTTNG_ERR_SAVE_IO_FAIL; | |
1661 | } | |
1662 | if (ret) { | |
1663 | /* Delete file in case of error */ | |
db471218 | 1664 | if (file_opened && unlink(config_file_path)) { |
fb198a11 JG |
1665 | PERROR("Unlinking XML session configuration."); |
1666 | } | |
1667 | } | |
1668 | ||
1669 | return ret; | |
1670 | } | |
1671 | ||
1672 | int cmd_save_sessions(struct lttng_save_session_attr *attr, | |
1673 | lttng_sock_cred *creds) | |
1674 | { | |
1675 | int ret; | |
1676 | const char *session_name; | |
1677 | struct ltt_session *session; | |
1678 | ||
1679 | session_lock_list(); | |
1680 | ||
1681 | session_name = lttng_save_session_attr_get_session_name(attr); | |
1682 | if (session_name) { | |
1683 | session = session_find_by_name(session_name); | |
1684 | if (!session) { | |
1685 | ret = LTTNG_ERR_SESS_NOT_FOUND; | |
1686 | goto end; | |
1687 | } | |
1688 | ||
1689 | session_lock(session); | |
1690 | ret = save_session(session, attr, creds); | |
1691 | session_unlock(session); | |
1692 | if (ret) { | |
1693 | goto end; | |
1694 | } | |
1695 | } else { | |
1696 | struct ltt_session_list *list = session_get_list(); | |
1697 | ||
1698 | cds_list_for_each_entry(session, &list->head, list) { | |
1699 | session_lock(session); | |
1700 | ret = save_session(session, attr, creds); | |
1701 | session_unlock(session); | |
1702 | ||
1703 | /* Don't abort if we don't have the required permissions. */ | |
1704 | if (ret && ret != LTTNG_ERR_EPERM) { | |
1705 | goto end; | |
1706 | } | |
1707 | } | |
1708 | } | |
1709 | ret = LTTNG_OK; | |
1710 | ||
1711 | end: | |
1712 | session_unlock_list(); | |
1713 | return ret; | |
1714 | } |