Commit | Line | Data |
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fb198a11 JG |
1 | /* |
2 | * Copyright (C) 2014 - Jérémie Galarneau <jeremie.galarneau@efficios.com> | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms of the GNU General Public License, version 2 only, as | |
6 | * published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
11 | * more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License along with | |
14 | * this program; if not, write to the Free Software Foundation, Inc., 51 | |
15 | * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
16 | */ | |
17 | ||
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 | ||
847a5916 | 33 | #include "kernel.h" |
fb198a11 JG |
34 | #include "save.h" |
35 | #include "session.h" | |
0de3eda1 | 36 | #include "syscall.h" |
fb198a11 | 37 | #include "trace-ust.h" |
51755dc8 | 38 | #include "agent.h" |
fb198a11 JG |
39 | |
40 | static | |
41 | int save_kernel_channel_attributes(struct config_writer *writer, | |
42 | struct lttng_channel_attr *attr) | |
43 | { | |
44 | int ret; | |
45 | ||
46 | ret = config_writer_write_element_string(writer, | |
47 | config_element_overwrite_mode, | |
48 | attr->overwrite ? config_overwrite_mode_overwrite : | |
49 | config_overwrite_mode_discard); | |
50 | if (ret) { | |
51 | goto end; | |
52 | } | |
53 | ||
54 | ret = config_writer_write_element_unsigned_int(writer, | |
55 | config_element_subbuf_size, attr->subbuf_size); | |
56 | if (ret) { | |
57 | goto end; | |
58 | } | |
59 | ||
60 | ret = config_writer_write_element_unsigned_int(writer, | |
61 | config_element_num_subbuf, | |
62 | attr->num_subbuf); | |
63 | if (ret) { | |
64 | goto end; | |
65 | } | |
66 | ||
67 | ret = config_writer_write_element_unsigned_int(writer, | |
68 | config_element_switch_timer_interval, | |
69 | attr->switch_timer_interval); | |
70 | if (ret) { | |
71 | goto end; | |
72 | } | |
73 | ||
74 | ret = config_writer_write_element_unsigned_int(writer, | |
75 | config_element_read_timer_interval, | |
76 | attr->read_timer_interval); | |
77 | if (ret) { | |
78 | goto end; | |
79 | } | |
80 | ||
81 | ret = config_writer_write_element_string(writer, | |
82 | config_element_output_type, | |
83 | attr->output == LTTNG_EVENT_SPLICE ? | |
84 | config_output_type_splice : config_output_type_mmap); | |
85 | if (ret) { | |
86 | goto end; | |
87 | } | |
88 | ||
89 | ret = config_writer_write_element_unsigned_int(writer, | |
90 | config_element_tracefile_size, attr->tracefile_size); | |
91 | if (ret) { | |
92 | goto end; | |
93 | } | |
94 | ||
95 | ret = config_writer_write_element_unsigned_int(writer, | |
96 | config_element_tracefile_count, | |
97 | attr->tracefile_count); | |
98 | if (ret) { | |
99 | goto end; | |
100 | } | |
101 | ||
102 | ret = config_writer_write_element_unsigned_int(writer, | |
103 | config_element_live_timer_interval, | |
104 | attr->live_timer_interval); | |
105 | if (ret) { | |
106 | goto end; | |
107 | } | |
108 | end: | |
109 | return ret ? LTTNG_ERR_SAVE_IO_FAIL : 0; | |
110 | } | |
111 | ||
112 | static | |
113 | int save_ust_channel_attributes(struct config_writer *writer, | |
114 | struct lttng_ust_channel_attr *attr) | |
115 | { | |
116 | int ret; | |
117 | ||
118 | ret = config_writer_write_element_string(writer, | |
119 | config_element_overwrite_mode, | |
120 | attr->overwrite ? config_overwrite_mode_overwrite : | |
121 | config_overwrite_mode_discard); | |
122 | if (ret) { | |
123 | goto end; | |
124 | } | |
125 | ||
126 | ret = config_writer_write_element_unsigned_int(writer, | |
127 | config_element_subbuf_size, attr->subbuf_size); | |
128 | if (ret) { | |
129 | goto end; | |
130 | } | |
131 | ||
132 | ret = config_writer_write_element_unsigned_int(writer, | |
133 | config_element_num_subbuf, | |
134 | attr->num_subbuf); | |
135 | if (ret) { | |
136 | goto end; | |
137 | } | |
138 | ||
139 | ret = config_writer_write_element_unsigned_int(writer, | |
140 | config_element_switch_timer_interval, | |
141 | attr->switch_timer_interval); | |
142 | if (ret) { | |
143 | goto end; | |
144 | } | |
145 | ||
146 | ret = config_writer_write_element_unsigned_int(writer, | |
147 | config_element_read_timer_interval, | |
148 | attr->read_timer_interval); | |
149 | if (ret) { | |
150 | goto end; | |
151 | } | |
152 | ||
153 | ret = config_writer_write_element_string(writer, | |
154 | config_element_output_type, | |
155 | attr->output == LTTNG_UST_MMAP ? | |
156 | config_output_type_mmap : config_output_type_splice); | |
157 | if (ret) { | |
158 | goto end; | |
159 | } | |
160 | end: | |
161 | return ret ? LTTNG_ERR_SAVE_IO_FAIL : 0; | |
162 | } | |
163 | ||
164 | static | |
165 | const char *get_kernel_instrumentation_string( | |
166 | enum lttng_kernel_instrumentation instrumentation) | |
167 | { | |
168 | const char *instrumentation_string; | |
169 | ||
170 | switch (instrumentation) { | |
171 | case LTTNG_KERNEL_ALL: | |
172 | instrumentation_string = config_event_type_all; | |
173 | break; | |
174 | case LTTNG_KERNEL_TRACEPOINT: | |
175 | instrumentation_string = config_event_type_tracepoint; | |
176 | break; | |
177 | case LTTNG_KERNEL_KPROBE: | |
178 | instrumentation_string = config_event_type_kprobe; | |
179 | break; | |
180 | case LTTNG_KERNEL_FUNCTION: | |
181 | instrumentation_string = config_event_type_function; | |
182 | break; | |
183 | case LTTNG_KERNEL_KRETPROBE: | |
184 | instrumentation_string = config_event_type_kretprobe; | |
185 | break; | |
186 | case LTTNG_KERNEL_NOOP: | |
187 | instrumentation_string = config_event_type_noop; | |
188 | break; | |
189 | case LTTNG_KERNEL_SYSCALL: | |
190 | instrumentation_string = config_event_type_syscall; | |
191 | break; | |
192 | default: | |
193 | instrumentation_string = NULL; | |
194 | } | |
195 | ||
196 | return instrumentation_string; | |
197 | } | |
198 | ||
199 | static | |
200 | const char *get_kernel_context_type_string( | |
201 | enum lttng_kernel_context_type context_type) | |
202 | { | |
203 | const char *context_type_string; | |
204 | ||
205 | switch (context_type) { | |
206 | case LTTNG_KERNEL_CONTEXT_PID: | |
207 | context_type_string = config_event_context_pid; | |
208 | break; | |
209 | case LTTNG_KERNEL_CONTEXT_PROCNAME: | |
210 | context_type_string = config_event_context_procname; | |
211 | break; | |
212 | case LTTNG_KERNEL_CONTEXT_PRIO: | |
213 | context_type_string = config_event_context_prio; | |
214 | break; | |
215 | case LTTNG_KERNEL_CONTEXT_NICE: | |
216 | context_type_string = config_event_context_nice; | |
217 | break; | |
218 | case LTTNG_KERNEL_CONTEXT_VPID: | |
219 | context_type_string = config_event_context_vpid; | |
220 | break; | |
221 | case LTTNG_KERNEL_CONTEXT_TID: | |
222 | context_type_string = config_event_context_tid; | |
223 | break; | |
224 | case LTTNG_KERNEL_CONTEXT_VTID: | |
225 | context_type_string = config_event_context_vtid; | |
226 | break; | |
227 | case LTTNG_KERNEL_CONTEXT_PPID: | |
228 | context_type_string = config_event_context_ppid; | |
229 | break; | |
230 | case LTTNG_KERNEL_CONTEXT_VPPID: | |
231 | context_type_string = config_event_context_vppid; | |
232 | break; | |
233 | case LTTNG_KERNEL_CONTEXT_HOSTNAME: | |
234 | context_type_string = config_event_context_hostname; | |
235 | break; | |
236 | default: | |
237 | context_type_string = NULL; | |
238 | } | |
239 | ||
240 | return context_type_string; | |
241 | } | |
242 | ||
243 | static | |
244 | const char *get_ust_context_type_string( | |
245 | enum lttng_ust_context_type context_type) | |
246 | { | |
247 | const char *context_type_string; | |
248 | ||
249 | switch (context_type) { | |
250 | case LTTNG_UST_CONTEXT_PROCNAME: | |
251 | context_type_string = config_event_context_procname; | |
252 | break; | |
253 | case LTTNG_UST_CONTEXT_VPID: | |
254 | context_type_string = config_event_context_vpid; | |
255 | break; | |
256 | case LTTNG_UST_CONTEXT_VTID: | |
257 | context_type_string = config_event_context_vtid; | |
258 | break; | |
259 | case LTTNG_UST_CONTEXT_IP: | |
260 | context_type_string = config_event_context_ip; | |
261 | break; | |
262 | case LTTNG_UST_CONTEXT_PTHREAD_ID: | |
263 | context_type_string = config_event_context_pthread_id; | |
264 | break; | |
e885a367 | 265 | case LTTNG_UST_CONTEXT_PERF_THREAD_COUNTER: |
14ce5bd8 JG |
266 | /* |
267 | * Error, should not be stored in the XML, perf contexts | |
268 | * are stored as a node of type event_perf_context_type. | |
269 | */ | |
fb198a11 JG |
270 | default: |
271 | context_type_string = NULL; | |
e885a367 | 272 | break; |
fb198a11 JG |
273 | } |
274 | ||
275 | return context_type_string; | |
276 | } | |
277 | ||
278 | static | |
279 | const char *get_buffer_type_string( | |
280 | enum lttng_buffer_type buffer_type) | |
281 | { | |
282 | const char *buffer_type_string; | |
283 | ||
284 | switch (buffer_type) { | |
285 | case LTTNG_BUFFER_PER_PID: | |
286 | buffer_type_string = config_buffer_type_per_pid; | |
287 | break; | |
288 | case LTTNG_BUFFER_PER_UID: | |
289 | buffer_type_string = config_buffer_type_per_uid; | |
290 | break; | |
291 | case LTTNG_BUFFER_GLOBAL: | |
292 | buffer_type_string = config_buffer_type_global; | |
293 | break; | |
294 | default: | |
295 | buffer_type_string = NULL; | |
296 | } | |
297 | ||
298 | return buffer_type_string; | |
299 | } | |
300 | ||
301 | static | |
302 | const char *get_loglevel_type_string( | |
303 | enum lttng_ust_loglevel_type loglevel_type) | |
304 | { | |
305 | const char *loglevel_type_string; | |
306 | ||
307 | switch (loglevel_type) { | |
308 | case LTTNG_UST_LOGLEVEL_ALL: | |
309 | loglevel_type_string = config_loglevel_type_all; | |
310 | break; | |
311 | case LTTNG_UST_LOGLEVEL_RANGE: | |
312 | loglevel_type_string = config_loglevel_type_range; | |
313 | break; | |
314 | case LTTNG_UST_LOGLEVEL_SINGLE: | |
315 | loglevel_type_string = config_loglevel_type_single; | |
316 | break; | |
317 | default: | |
318 | loglevel_type_string = NULL; | |
319 | } | |
320 | ||
321 | return loglevel_type_string; | |
322 | } | |
323 | ||
324 | static | |
325 | int save_kernel_event(struct config_writer *writer, | |
326 | struct ltt_kernel_event *event) | |
327 | { | |
328 | int ret; | |
329 | const char *instrumentation_type; | |
330 | ||
331 | ret = config_writer_open_element(writer, config_element_event); | |
332 | if (ret) { | |
333 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
334 | goto end; | |
335 | } | |
336 | ||
337 | if (event->event->name[0]) { | |
338 | ret = config_writer_write_element_string(writer, | |
339 | config_element_name, event->event->name); | |
340 | if (ret) { | |
341 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
342 | goto end; | |
343 | } | |
344 | } | |
345 | ||
346 | ret = config_writer_write_element_bool(writer, config_element_enabled, | |
347 | event->enabled); | |
348 | if (ret) { | |
349 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
350 | goto end; | |
351 | } | |
352 | ||
353 | instrumentation_type = get_kernel_instrumentation_string( | |
354 | event->event->instrumentation); | |
355 | if (!instrumentation_type) { | |
356 | ret = LTTNG_ERR_INVALID; | |
357 | goto end; | |
358 | } | |
359 | ||
360 | ret = config_writer_write_element_string(writer, config_element_type, | |
361 | instrumentation_type); | |
362 | if (ret) { | |
363 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
364 | goto end; | |
365 | } | |
366 | ||
911d1560 JG |
367 | if (event->filter_expression) { |
368 | ret = config_writer_write_element_string(writer, | |
369 | config_element_filter, | |
370 | event->filter_expression); | |
371 | if (ret) { | |
372 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
373 | goto end; | |
374 | } | |
375 | } | |
376 | ||
fb198a11 JG |
377 | if (event->event->instrumentation == LTTNG_KERNEL_FUNCTION || |
378 | event->event->instrumentation == LTTNG_KERNEL_KPROBE || | |
379 | event->event->instrumentation == LTTNG_KERNEL_KRETPROBE) { | |
380 | ||
381 | ret = config_writer_open_element(writer, | |
382 | config_element_attributes); | |
383 | if (ret) { | |
384 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
385 | goto end; | |
386 | } | |
387 | ||
388 | switch (event->event->instrumentation) { | |
0de3eda1 | 389 | case LTTNG_KERNEL_SYSCALL: |
fb198a11 JG |
390 | case LTTNG_KERNEL_FUNCTION: |
391 | ret = config_writer_open_element(writer, | |
392 | config_element_function_attributes); | |
393 | if (ret) { | |
394 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
395 | goto end; | |
396 | } | |
397 | ||
398 | ret = config_writer_write_element_string(writer, | |
399 | config_element_name, | |
400 | event->event->u.ftrace.symbol_name); | |
401 | if (ret) { | |
402 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
403 | goto end; | |
404 | } | |
405 | ||
406 | /* /function attributes */ | |
407 | ret = config_writer_close_element(writer); | |
408 | if (ret) { | |
409 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
410 | goto end; | |
411 | } | |
412 | break; | |
413 | case LTTNG_KERNEL_KPROBE: | |
414 | case LTTNG_KERNEL_KRETPROBE: | |
415 | { | |
416 | const char *symbol_name; | |
417 | uint64_t addr; | |
418 | uint64_t offset; | |
419 | ||
420 | if (event->event->instrumentation == | |
421 | LTTNG_KERNEL_KPROBE) { | |
422 | /* | |
423 | * Comments in lttng-kernel.h mention that | |
424 | * either addr or symbol_name are set, not both. | |
425 | */ | |
426 | addr = event->event->u.kprobe.addr; | |
427 | offset = event->event->u.kprobe.offset; | |
428 | symbol_name = addr ? NULL : | |
429 | event->event->u.kprobe.symbol_name; | |
430 | } else { | |
431 | symbol_name = | |
432 | event->event->u.kretprobe.symbol_name; | |
433 | addr = event->event->u.kretprobe.addr; | |
434 | offset = event->event->u.kretprobe.offset; | |
435 | } | |
436 | ||
437 | ret = config_writer_open_element(writer, | |
438 | config_element_probe_attributes); | |
439 | if (ret) { | |
440 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
441 | goto end; | |
442 | } | |
443 | ||
444 | if (symbol_name) { | |
445 | ret = config_writer_write_element_string(writer, | |
446 | config_element_symbol_name, | |
447 | symbol_name); | |
448 | if (ret) { | |
449 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
450 | goto end; | |
451 | } | |
452 | } | |
453 | ||
454 | if (addr) { | |
455 | ret = config_writer_write_element_unsigned_int( | |
456 | writer, config_element_address, addr); | |
457 | if (ret) { | |
458 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
459 | goto end; | |
460 | } | |
461 | } | |
462 | ||
463 | if (offset) { | |
464 | ret = config_writer_write_element_unsigned_int( | |
465 | writer, config_element_offset, offset); | |
466 | if (ret) { | |
467 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
468 | goto end; | |
469 | } | |
470 | } | |
471 | ||
472 | ret = config_writer_close_element(writer); | |
473 | if (ret) { | |
474 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
475 | goto end; | |
476 | } | |
477 | break; | |
478 | } | |
479 | default: | |
480 | ERR("Unsupported kernel instrumentation type."); | |
481 | ret = LTTNG_ERR_INVALID; | |
482 | goto end; | |
483 | } | |
484 | ||
485 | /* /attributes */ | |
486 | ret = config_writer_close_element(writer); | |
487 | if (ret) { | |
488 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
489 | goto end; | |
490 | } | |
491 | } | |
492 | ||
493 | /* /event */ | |
494 | ret = config_writer_close_element(writer); | |
495 | if (ret) { | |
496 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
497 | goto end; | |
498 | } | |
499 | end: | |
500 | return ret; | |
501 | } | |
502 | ||
0de3eda1 DG |
503 | static |
504 | int save_kernel_syscall(struct config_writer *writer, | |
505 | struct ltt_kernel_channel *kchan) | |
506 | { | |
507 | int ret, i; | |
508 | ssize_t count; | |
509 | struct lttng_event *events = NULL; | |
510 | ||
511 | assert(writer); | |
512 | assert(kchan); | |
513 | ||
514 | count = syscall_list_channel(kchan, &events, 0); | |
515 | if (!count) { | |
516 | /* No syscalls, just gracefully return. */ | |
517 | ret = 0; | |
518 | goto end; | |
519 | } | |
520 | ||
521 | for (i = 0; i < count; i++) { | |
522 | struct ltt_kernel_event *kevent; | |
523 | ||
524 | /* Create a temporary kevent in order to save it. */ | |
00a62084 MD |
525 | /* |
526 | * TODO: struct lttng_event does not really work for a filter, | |
527 | * but unfortunately, it is exposed as external API (and used as | |
528 | * internal representation. Using NULL meanwhile. | |
529 | */ | |
530 | kevent = trace_kernel_create_event(&events[i], | |
531 | NULL, NULL); | |
0de3eda1 DG |
532 | if (!kevent) { |
533 | ret = -ENOMEM; | |
534 | goto end; | |
535 | } | |
536 | /* Init list in order so the destroy call can del the node. */ | |
537 | CDS_INIT_LIST_HEAD(&kevent->list); | |
538 | ||
539 | ret = save_kernel_event(writer, kevent); | |
540 | trace_kernel_destroy_event(kevent); | |
541 | if (ret) { | |
542 | goto end; | |
543 | } | |
544 | } | |
545 | ||
546 | /* Everything went well */ | |
547 | ret = 0; | |
548 | ||
549 | end: | |
550 | free(events); | |
551 | return ret; | |
552 | } | |
553 | ||
fb198a11 JG |
554 | static |
555 | int save_kernel_events(struct config_writer *writer, | |
0de3eda1 | 556 | struct ltt_kernel_channel *kchan) |
fb198a11 JG |
557 | { |
558 | int ret; | |
559 | struct ltt_kernel_event *event; | |
560 | ||
561 | ret = config_writer_open_element(writer, config_element_events); | |
562 | if (ret) { | |
563 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
564 | goto end; | |
565 | } | |
566 | ||
0de3eda1 | 567 | cds_list_for_each_entry(event, &kchan->events_list.head, list) { |
fb198a11 JG |
568 | ret = save_kernel_event(writer, event); |
569 | if (ret) { | |
570 | goto end; | |
571 | } | |
572 | } | |
573 | ||
0de3eda1 DG |
574 | /* Save syscalls if any. */ |
575 | ret = save_kernel_syscall(writer, kchan); | |
576 | if (ret) { | |
577 | goto end; | |
578 | } | |
579 | ||
fb198a11 JG |
580 | /* /events */ |
581 | ret = config_writer_close_element(writer); | |
582 | if (ret) { | |
583 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
584 | goto end; | |
585 | } | |
586 | end: | |
587 | return ret; | |
588 | } | |
589 | ||
590 | static | |
591 | int save_ust_event(struct config_writer *writer, | |
592 | struct ltt_ust_event *event) | |
593 | { | |
594 | int ret; | |
595 | const char *loglevel_type_string; | |
596 | ||
597 | ret = config_writer_open_element(writer, config_element_event); | |
598 | if (ret) { | |
599 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
600 | goto end; | |
601 | } | |
602 | ||
603 | if (event->attr.name[0]) { | |
604 | ret = config_writer_write_element_string(writer, | |
605 | config_element_name, event->attr.name); | |
606 | if (ret) { | |
607 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
608 | goto end; | |
609 | } | |
610 | } | |
611 | ||
612 | ret = config_writer_write_element_bool(writer, config_element_enabled, | |
613 | event->enabled); | |
614 | if (ret) { | |
615 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
616 | goto end; | |
617 | } | |
618 | ||
619 | if (event->attr.instrumentation != LTTNG_UST_TRACEPOINT) { | |
620 | ERR("Unsupported UST instrumentation type."); | |
621 | ret = LTTNG_ERR_INVALID; | |
622 | goto end; | |
623 | } | |
624 | ret = config_writer_write_element_string(writer, config_element_type, | |
625 | config_event_type_tracepoint); | |
626 | if (ret) { | |
627 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
628 | goto end; | |
629 | } | |
630 | ||
631 | loglevel_type_string = get_loglevel_type_string( | |
632 | event->attr.loglevel_type); | |
633 | if (!loglevel_type_string) { | |
634 | ERR("Unsupported UST loglevel type."); | |
635 | ret = LTTNG_ERR_INVALID; | |
636 | goto end; | |
637 | } | |
638 | ||
639 | ret = config_writer_write_element_string(writer, | |
640 | config_element_loglevel_type, loglevel_type_string); | |
641 | if (ret) { | |
642 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
643 | goto end; | |
644 | } | |
645 | ||
1adbdb10 JG |
646 | /* The log level is irrelevant if no "filtering" is enabled */ |
647 | if (event->attr.loglevel_type != LTTNG_UST_LOGLEVEL_ALL) { | |
648 | ret = config_writer_write_element_signed_int(writer, | |
649 | config_element_loglevel, event->attr.loglevel); | |
650 | if (ret) { | |
651 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
652 | goto end; | |
653 | } | |
fb198a11 JG |
654 | } |
655 | ||
656 | if (event->filter_expression) { | |
657 | ret = config_writer_write_element_string(writer, | |
658 | config_element_filter, event->filter_expression); | |
659 | if (ret) { | |
660 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
661 | goto end; | |
662 | } | |
663 | } | |
664 | ||
665 | if (event->exclusion && event->exclusion->count) { | |
666 | uint32_t i; | |
667 | ||
668 | ret = config_writer_open_element(writer, | |
669 | config_element_exclusions); | |
670 | if (ret) { | |
671 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
672 | goto end; | |
673 | } | |
674 | ||
675 | for (i = 0; i < event->exclusion->count; i++) { | |
676 | ret = config_writer_write_element_string(writer, | |
677 | config_element_exclusion, | |
678 | &event->exclusion->names[0][i]); | |
679 | if (ret) { | |
680 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
681 | goto end; | |
682 | } | |
683 | } | |
684 | ||
685 | /* /exclusions */ | |
686 | ret = config_writer_close_element(writer); | |
687 | if (ret) { | |
688 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
689 | goto end; | |
690 | } | |
691 | } | |
692 | ||
693 | /* /event */ | |
694 | ret = config_writer_close_element(writer); | |
695 | if (ret) { | |
696 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
697 | goto end; | |
698 | } | |
699 | end: | |
700 | return ret; | |
701 | } | |
702 | ||
703 | static | |
704 | int save_ust_events(struct config_writer *writer, | |
705 | struct lttng_ht *events) | |
706 | { | |
707 | int ret; | |
708 | struct ltt_ust_event *event; | |
709 | struct lttng_ht_node_str *node; | |
710 | struct lttng_ht_iter iter; | |
711 | ||
712 | ret = config_writer_open_element(writer, config_element_events); | |
713 | if (ret) { | |
714 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
715 | goto end; | |
716 | } | |
717 | ||
718 | rcu_read_lock(); | |
719 | cds_lfht_for_each_entry(events->ht, &iter.iter, node, node) { | |
720 | event = caa_container_of(node, struct ltt_ust_event, node); | |
721 | ||
af325ba1 JG |
722 | if (event->internal) { |
723 | /* Internal events must not be exposed to clients */ | |
724 | continue; | |
725 | } | |
fb198a11 JG |
726 | ret = save_ust_event(writer, event); |
727 | if (ret) { | |
728 | rcu_read_unlock(); | |
729 | goto end; | |
730 | } | |
731 | } | |
732 | rcu_read_unlock(); | |
733 | ||
734 | /* /events */ | |
735 | ret = config_writer_close_element(writer); | |
736 | if (ret) { | |
737 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
738 | goto end; | |
739 | } | |
740 | end: | |
741 | return ret; | |
742 | } | |
743 | ||
51755dc8 JG |
744 | static |
745 | void init_ust_event_from_agent_event(struct ltt_ust_event *ust_event, | |
746 | struct agent_event *agent_event) | |
747 | { | |
748 | ust_event->enabled = agent_event->enabled; | |
749 | ust_event->attr.instrumentation = LTTNG_UST_TRACEPOINT; | |
750 | strncpy(ust_event->attr.name, agent_event->name, LTTNG_SYMBOL_NAME_LEN); | |
751 | ust_event->attr.loglevel_type = agent_event->loglevel_type; | |
752 | ust_event->attr.loglevel = agent_event->loglevel; | |
753 | ust_event->filter_expression = agent_event->filter_expression; | |
754 | ust_event->exclusion = agent_event->exclusion; | |
755 | } | |
756 | ||
757 | static | |
758 | int save_agent_events(struct config_writer *writer, | |
759 | struct ltt_ust_channel *chan, | |
760 | struct agent *agent) | |
761 | { | |
762 | int ret; | |
763 | struct lttng_ht_iter iter; | |
764 | struct lttng_ht_node_str *node; | |
765 | ||
766 | ret = config_writer_open_element(writer, config_element_events); | |
767 | if (ret) { | |
768 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
769 | goto end; | |
770 | } | |
771 | ||
772 | rcu_read_lock(); | |
773 | cds_lfht_for_each_entry(agent->events->ht, &iter.iter, node, node) { | |
774 | int ret; | |
775 | struct agent_event *agent_event; | |
776 | struct ltt_ust_event fake_event; | |
777 | ||
778 | memset(&fake_event, 0, sizeof(fake_event)); | |
779 | agent_event = caa_container_of(node, struct agent_event, node); | |
780 | ||
781 | /* | |
782 | * Initialize a fake ust event to reuse the same serialization | |
783 | * function since UST and agent events contain the same info | |
784 | * (and one could wonder why they don't reuse the same | |
785 | * structures...). | |
786 | */ | |
787 | init_ust_event_from_agent_event(&fake_event, agent_event); | |
788 | ret = save_ust_event(writer, &fake_event); | |
789 | if (ret) { | |
790 | rcu_read_unlock(); | |
791 | goto end; | |
792 | } | |
793 | } | |
794 | rcu_read_unlock(); | |
795 | ||
796 | /* /events */ | |
797 | ret = config_writer_close_element(writer); | |
798 | if (ret) { | |
799 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
800 | goto end; | |
801 | } | |
802 | end: | |
803 | return ret; | |
804 | } | |
805 | ||
fb198a11 JG |
806 | static |
807 | int save_kernel_context(struct config_writer *writer, | |
808 | struct lttng_kernel_context *ctx) | |
809 | { | |
810 | int ret = 0; | |
811 | ||
812 | if (!ctx) { | |
813 | goto end; | |
814 | } | |
815 | ||
fb198a11 JG |
816 | ret = config_writer_open_element(writer, config_element_context); |
817 | if (ret) { | |
818 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
819 | goto end; | |
820 | } | |
821 | ||
cba45eda | 822 | if (ctx->ctx == LTTNG_KERNEL_CONTEXT_PERF_CPU_COUNTER) { |
fb198a11 JG |
823 | ret = config_writer_open_element(writer, config_element_perf); |
824 | if (ret) { | |
825 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
826 | goto end; | |
827 | } | |
828 | ||
829 | ret = config_writer_write_element_unsigned_int(writer, | |
830 | config_element_type, ctx->u.perf_counter.type); | |
831 | if (ret) { | |
832 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
833 | goto end; | |
834 | } | |
835 | ||
836 | ret = config_writer_write_element_unsigned_int(writer, | |
837 | config_element_config, ctx->u.perf_counter.config); | |
838 | if (ret) { | |
839 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
840 | goto end; | |
841 | } | |
842 | ||
843 | ret = config_writer_write_element_string(writer, | |
844 | config_element_name, ctx->u.perf_counter.name); | |
845 | if (ret) { | |
846 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
847 | goto end; | |
848 | } | |
849 | ||
850 | /* /perf */ | |
851 | ret = config_writer_close_element(writer); | |
852 | if (ret) { | |
853 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
854 | goto end; | |
855 | } | |
856 | } else { | |
857 | const char *context_type_string = | |
858 | get_kernel_context_type_string(ctx->ctx); | |
859 | ||
860 | if (!context_type_string) { | |
861 | ERR("Unsupported kernel context type."); | |
862 | ret = LTTNG_ERR_INVALID; | |
863 | goto end; | |
864 | } | |
865 | ||
866 | ret = config_writer_write_element_string(writer, | |
867 | config_element_type, context_type_string); | |
868 | if (ret) { | |
869 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
870 | goto end; | |
871 | } | |
872 | } | |
873 | ||
874 | /* /context */ | |
875 | ret = config_writer_close_element(writer); | |
876 | if (ret) { | |
877 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
878 | goto end; | |
879 | } | |
880 | ||
645328ae DG |
881 | end: |
882 | return ret; | |
883 | } | |
884 | ||
885 | static | |
886 | int save_kernel_contexts(struct config_writer *writer, | |
887 | struct ltt_kernel_channel *kchan) | |
888 | { | |
889 | int ret; | |
890 | struct ltt_kernel_context *ctx; | |
891 | ||
2aa64052 JG |
892 | if (cds_list_empty(&kchan->ctx_list)) { |
893 | ret = 0; | |
894 | goto end; | |
895 | } | |
896 | ||
645328ae DG |
897 | ret = config_writer_open_element(writer, config_element_contexts); |
898 | if (ret) { | |
899 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
900 | goto end; | |
901 | } | |
902 | ||
903 | cds_list_for_each_entry(ctx, &kchan->ctx_list, list) { | |
904 | ret = save_kernel_context(writer, &ctx->ctx); | |
905 | if (ret) { | |
906 | goto end; | |
907 | } | |
908 | } | |
909 | ||
fb198a11 JG |
910 | /* /contexts */ |
911 | ret = config_writer_close_element(writer); | |
912 | if (ret) { | |
913 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
914 | goto end; | |
915 | } | |
916 | end: | |
917 | return ret; | |
918 | } | |
919 | ||
920 | static | |
921 | int save_ust_context(struct config_writer *writer, | |
922 | struct cds_list_head *ctx_list) | |
923 | { | |
924 | int ret; | |
925 | struct ltt_ust_context *ctx; | |
926 | ||
927 | assert(writer); | |
928 | assert(ctx_list); | |
929 | ||
930 | ret = config_writer_open_element(writer, config_element_contexts); | |
931 | if (ret) { | |
932 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
933 | goto end; | |
934 | } | |
935 | ||
936 | cds_list_for_each_entry(ctx, ctx_list, list) { | |
937 | const char *context_type_string; | |
938 | ||
fb198a11 JG |
939 | |
940 | ret = config_writer_open_element(writer, | |
941 | config_element_context); | |
942 | if (ret) { | |
943 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
944 | goto end; | |
945 | } | |
946 | ||
14ce5bd8 JG |
947 | if (ctx->ctx.ctx == LTTNG_UST_CONTEXT_PERF_THREAD_COUNTER) { |
948 | /* Perf contexts are saved as event_perf_context_type */ | |
949 | ret = config_writer_open_element(writer, | |
950 | config_element_perf); | |
951 | if (ret) { | |
952 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
953 | goto end; | |
954 | } | |
955 | ||
956 | ret = config_writer_write_element_unsigned_int(writer, | |
957 | config_element_type, | |
958 | ctx->ctx.u.perf_counter.type); | |
959 | if (ret) { | |
960 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
961 | goto end; | |
962 | } | |
963 | ||
964 | ret = config_writer_write_element_unsigned_int(writer, | |
965 | config_element_config, | |
966 | ctx->ctx.u.perf_counter.config); | |
967 | if (ret) { | |
968 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
969 | goto end; | |
970 | } | |
971 | ||
972 | ret = config_writer_write_element_string(writer, | |
973 | config_element_name, | |
974 | ctx->ctx.u.perf_counter.name); | |
975 | if (ret) { | |
976 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
977 | goto end; | |
978 | } | |
979 | ||
980 | /* /perf */ | |
981 | ret = config_writer_close_element(writer); | |
982 | if (ret) { | |
983 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
984 | goto end; | |
985 | } | |
986 | } else { | |
987 | /* Save context as event_context_type_type */ | |
988 | context_type_string = get_ust_context_type_string( | |
989 | ctx->ctx.ctx); | |
990 | if (!context_type_string) { | |
991 | ERR("Unsupported UST context type.") | |
992 | ret = LTTNG_ERR_INVALID; | |
993 | goto end; | |
994 | } | |
995 | ||
996 | ret = config_writer_write_element_string(writer, | |
997 | config_element_type, context_type_string); | |
998 | if (ret) { | |
999 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1000 | goto end; | |
1001 | } | |
fb198a11 JG |
1002 | } |
1003 | ||
1004 | /* /context */ | |
1005 | ret = config_writer_close_element(writer); | |
1006 | if (ret) { | |
1007 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1008 | goto end; | |
1009 | } | |
1010 | } | |
1011 | ||
1012 | /* /contexts */ | |
1013 | ret = config_writer_close_element(writer); | |
1014 | if (ret) { | |
1015 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1016 | goto end; | |
1017 | } | |
1018 | end: | |
1019 | return ret; | |
1020 | } | |
1021 | ||
1022 | static | |
1023 | int save_kernel_channel(struct config_writer *writer, | |
1024 | struct ltt_kernel_channel *kchan) | |
1025 | { | |
1026 | int ret; | |
1027 | ||
1028 | assert(writer); | |
1029 | assert(kchan); | |
1030 | ||
1031 | ret = config_writer_open_element(writer, config_element_channel); | |
1032 | if (ret) { | |
1033 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1034 | goto end; | |
1035 | } | |
1036 | ||
1037 | ret = config_writer_write_element_string(writer, config_element_name, | |
1038 | kchan->channel->name); | |
1039 | if (ret) { | |
1040 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1041 | goto end; | |
1042 | } | |
1043 | ||
1044 | ret = config_writer_write_element_bool(writer, config_element_enabled, | |
1045 | kchan->channel->enabled); | |
1046 | if (ret) { | |
1047 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1048 | goto end; | |
1049 | } | |
1050 | ||
1051 | ret = save_kernel_channel_attributes(writer, &kchan->channel->attr); | |
1052 | if (ret) { | |
1053 | goto end; | |
1054 | } | |
1055 | ||
0de3eda1 | 1056 | ret = save_kernel_events(writer, kchan); |
fb198a11 JG |
1057 | if (ret) { |
1058 | goto end; | |
1059 | } | |
1060 | ||
645328ae | 1061 | ret = save_kernel_contexts(writer, kchan); |
fb198a11 JG |
1062 | if (ret) { |
1063 | goto end; | |
1064 | } | |
1065 | ||
1066 | /* /channel */ | |
1067 | ret = config_writer_close_element(writer); | |
1068 | if (ret) { | |
1069 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1070 | goto end; | |
1071 | } | |
1072 | end: | |
1073 | return ret; | |
1074 | } | |
1075 | ||
1076 | static | |
1077 | int save_ust_channel(struct config_writer *writer, | |
1078 | struct ltt_ust_channel *ust_chan, | |
1079 | struct ltt_ust_session *session) | |
1080 | { | |
1081 | int ret; | |
1082 | ||
1083 | assert(writer); | |
1084 | assert(ust_chan); | |
1085 | assert(session); | |
1086 | ||
1087 | ret = config_writer_open_element(writer, config_element_channel); | |
1088 | if (ret) { | |
1089 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1090 | goto end; | |
1091 | } | |
1092 | ||
1093 | ret = config_writer_write_element_string(writer, config_element_name, | |
1094 | ust_chan->name); | |
1095 | if (ret) { | |
1096 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1097 | goto end; | |
1098 | } | |
1099 | ||
1100 | ret = config_writer_write_element_bool(writer, config_element_enabled, | |
1101 | ust_chan->enabled); | |
1102 | if (ret) { | |
1103 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1104 | goto end; | |
1105 | } | |
1106 | ||
1107 | ret = save_ust_channel_attributes(writer, &ust_chan->attr); | |
1108 | if (ret) { | |
1109 | goto end; | |
1110 | } | |
1111 | ||
1112 | ret = config_writer_write_element_unsigned_int(writer, | |
1113 | config_element_tracefile_size, ust_chan->tracefile_size); | |
1114 | if (ret) { | |
1115 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1116 | goto end; | |
1117 | } | |
1118 | ||
1119 | ret = config_writer_write_element_unsigned_int(writer, | |
1120 | config_element_tracefile_count, ust_chan->tracefile_count); | |
1121 | if (ret) { | |
1122 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1123 | goto end; | |
1124 | } | |
1125 | ||
1126 | ret = config_writer_write_element_unsigned_int(writer, | |
1127 | config_element_live_timer_interval, | |
1128 | session->live_timer_interval); | |
1129 | if (ret) { | |
1130 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1131 | goto end; | |
1132 | } | |
1133 | ||
51755dc8 JG |
1134 | if (ust_chan->domain == LTTNG_DOMAIN_UST) { |
1135 | ret = save_ust_events(writer, ust_chan->events); | |
1136 | if (ret) { | |
1137 | goto end; | |
1138 | } | |
1139 | } else { | |
1140 | struct agent *agent = NULL; | |
1141 | ||
1142 | agent = trace_ust_find_agent(session, ust_chan->domain); | |
1143 | if (!agent) { | |
1144 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1145 | ERR("Could not find agent associated to UST subdomain"); | |
1146 | goto end; | |
1147 | } | |
1148 | ||
1149 | /* | |
1150 | * Channels associated with a UST sub-domain (such as JUL, Log4j | |
1151 | * or Python) don't have any non-internal events. We retrieve | |
1152 | * the "agent" events associated with this channel and serialize | |
1153 | * them. | |
1154 | */ | |
1155 | ret = save_agent_events(writer, ust_chan, agent); | |
1156 | if (ret) { | |
1157 | goto end; | |
1158 | } | |
fb198a11 JG |
1159 | } |
1160 | ||
1161 | ret = save_ust_context(writer, &ust_chan->ctx_list); | |
1162 | if (ret) { | |
1163 | goto end; | |
1164 | } | |
1165 | ||
1166 | /* /channel */ | |
1167 | ret = config_writer_close_element(writer); | |
1168 | if (ret) { | |
1169 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1170 | goto end; | |
1171 | } | |
1172 | end: | |
1173 | return ret; | |
1174 | } | |
1175 | ||
1176 | static | |
1177 | int save_kernel_session(struct config_writer *writer, | |
1178 | struct ltt_session *session) | |
1179 | { | |
1180 | int ret; | |
1181 | struct ltt_kernel_channel *kchan; | |
1182 | ||
1183 | assert(writer); | |
1184 | assert(session); | |
1185 | ||
1186 | ret = config_writer_write_element_string(writer, config_element_type, | |
1187 | config_domain_type_kernel); | |
1188 | if (ret) { | |
1189 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1190 | goto end; | |
1191 | } | |
1192 | ||
1193 | ret = config_writer_write_element_string(writer, | |
1194 | config_element_buffer_type, config_buffer_type_global); | |
1195 | if (ret) { | |
1196 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1197 | goto end; | |
1198 | } | |
1199 | ||
1200 | ret = config_writer_open_element(writer, | |
1201 | config_element_channels); | |
1202 | if (ret) { | |
1203 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1204 | goto end; | |
1205 | } | |
1206 | ||
1207 | cds_list_for_each_entry(kchan, &session->kernel_session->channel_list.head, | |
1208 | list) { | |
1209 | ret = save_kernel_channel(writer, kchan); | |
1210 | if (ret) { | |
1211 | goto end; | |
1212 | } | |
1213 | } | |
1214 | ||
1215 | /* /channels */ | |
1216 | ret = config_writer_close_element(writer); | |
1217 | if (ret) { | |
1218 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1219 | goto end; | |
1220 | } | |
1221 | end: | |
1222 | return ret; | |
1223 | } | |
1224 | ||
1225 | static | |
51755dc8 JG |
1226 | const char *get_config_domain_str(enum lttng_domain_type domain) |
1227 | { | |
1228 | const char *str_dom; | |
1229 | ||
1230 | switch (domain) { | |
1231 | case LTTNG_DOMAIN_KERNEL: | |
1232 | str_dom = config_domain_type_kernel; | |
1233 | break; | |
1234 | case LTTNG_DOMAIN_UST: | |
1235 | str_dom = config_domain_type_ust; | |
1236 | break; | |
1237 | case LTTNG_DOMAIN_JUL: | |
1238 | str_dom = config_domain_type_jul; | |
1239 | break; | |
1240 | case LTTNG_DOMAIN_LOG4J: | |
1241 | str_dom = config_domain_type_log4j; | |
1242 | break; | |
1243 | case LTTNG_DOMAIN_PYTHON: | |
1244 | str_dom = config_domain_type_python; | |
1245 | break; | |
1246 | default: | |
1247 | assert(0); | |
1248 | } | |
1249 | ||
1250 | return str_dom; | |
1251 | } | |
1252 | ||
e8fcabef JG |
1253 | static |
1254 | int save_pid_tracker(struct config_writer *writer, | |
1255 | struct ltt_session *sess, int domain) | |
1256 | { | |
1257 | int ret = 0; | |
1258 | ssize_t nr_pids = 0, i; | |
1259 | int32_t *pids = NULL; | |
1260 | ||
1261 | switch (domain) { | |
1262 | case LTTNG_DOMAIN_KERNEL: | |
1263 | { | |
1264 | nr_pids = kernel_list_tracker_pids(sess->kernel_session, &pids); | |
1265 | if (nr_pids < 0) { | |
1266 | ret = LTTNG_ERR_KERN_LIST_FAIL; | |
1267 | goto end; | |
1268 | } | |
1269 | break; | |
1270 | } | |
1271 | case LTTNG_DOMAIN_UST: | |
1272 | { | |
1273 | nr_pids = trace_ust_list_tracker_pids(sess->ust_session, &pids); | |
1274 | if (nr_pids < 0) { | |
1275 | ret = LTTNG_ERR_UST_LIST_FAIL; | |
1276 | goto end; | |
1277 | } | |
1278 | break; | |
1279 | } | |
1280 | case LTTNG_DOMAIN_JUL: | |
1281 | case LTTNG_DOMAIN_LOG4J: | |
1282 | case LTTNG_DOMAIN_PYTHON: | |
1283 | default: | |
1284 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; | |
1285 | goto end; | |
1286 | } | |
1287 | ||
1288 | /* Only create a pid_tracker if enabled or untrack all */ | |
1289 | if (nr_pids != 1 || (nr_pids == 1 && pids[0] != -1)) { | |
1290 | ret = config_writer_open_element(writer, | |
1291 | config_element_pid_tracker); | |
1292 | if (ret) { | |
1293 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1294 | goto end; | |
1295 | } | |
1296 | ||
1297 | ret = config_writer_open_element(writer, | |
1298 | config_element_targets); | |
1299 | if (ret) { | |
1300 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1301 | goto end; | |
1302 | } | |
1303 | ||
1304 | for (i = 0; i < nr_pids; i++) { | |
1305 | ret = config_writer_open_element(writer, | |
1306 | config_element_target_pid); | |
1307 | if (ret) { | |
1308 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1309 | goto end; | |
1310 | } | |
1311 | ||
1312 | ret = config_writer_write_element_unsigned_int(writer, | |
1313 | config_element_pid, pids[i]); | |
1314 | if (ret) { | |
1315 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1316 | goto end; | |
1317 | } | |
1318 | ||
1319 | /* /pid_target */ | |
1320 | ret = config_writer_close_element(writer); | |
1321 | if (ret) { | |
1322 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1323 | goto end; | |
1324 | } | |
1325 | } | |
1326 | ||
1327 | /* /targets */ | |
1328 | ret = config_writer_close_element(writer); | |
1329 | if (ret) { | |
1330 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1331 | goto end; | |
1332 | } | |
1333 | ||
1334 | /* /pid_tracker */ | |
1335 | ret = config_writer_close_element(writer); | |
1336 | if (ret) { | |
1337 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1338 | goto end; | |
1339 | } | |
1340 | } | |
1341 | end: | |
1342 | free(pids); | |
1343 | return ret; | |
1344 | } | |
1345 | ||
51755dc8 JG |
1346 | static |
1347 | int save_ust_domain(struct config_writer *writer, | |
1348 | struct ltt_session *session, enum lttng_domain_type domain) | |
fb198a11 JG |
1349 | { |
1350 | int ret; | |
1351 | struct ltt_ust_channel *ust_chan; | |
1352 | const char *buffer_type_string; | |
1353 | struct lttng_ht_node_str *node; | |
1354 | struct lttng_ht_iter iter; | |
51755dc8 | 1355 | const char *config_domain_name; |
fb198a11 JG |
1356 | |
1357 | assert(writer); | |
1358 | assert(session); | |
1359 | ||
51755dc8 JG |
1360 | ret = config_writer_open_element(writer, |
1361 | config_element_domain); | |
1362 | if (ret) { | |
1363 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1364 | goto end; | |
1365 | } | |
1366 | ||
1367 | config_domain_name = get_config_domain_str(domain); | |
1368 | if (!config_domain_name) { | |
1369 | ret = LTTNG_ERR_INVALID; | |
1370 | goto end; | |
1371 | } | |
1372 | ||
1373 | ret = config_writer_write_element_string(writer, | |
1374 | config_element_type, config_domain_name); | |
fb198a11 JG |
1375 | if (ret) { |
1376 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1377 | goto end; | |
1378 | } | |
1379 | ||
1380 | buffer_type_string = get_buffer_type_string( | |
1381 | session->ust_session->buffer_type); | |
1382 | if (!buffer_type_string) { | |
1383 | ERR("Unsupported buffer type."); | |
1384 | ret = LTTNG_ERR_INVALID; | |
1385 | goto end; | |
1386 | } | |
1387 | ||
1388 | ret = config_writer_write_element_string(writer, | |
1389 | config_element_buffer_type, buffer_type_string); | |
1390 | if (ret) { | |
1391 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1392 | goto end; | |
1393 | } | |
1394 | ||
1395 | ret = config_writer_open_element(writer, config_element_channels); | |
1396 | if (ret) { | |
1397 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1398 | goto end; | |
1399 | } | |
1400 | ||
1401 | rcu_read_lock(); | |
1402 | cds_lfht_for_each_entry(session->ust_session->domain_global.channels->ht, | |
1403 | &iter.iter, node, node) { | |
fb198a11 | 1404 | ust_chan = caa_container_of(node, struct ltt_ust_channel, node); |
51755dc8 | 1405 | if (domain == ust_chan->domain) { |
fb198a11 JG |
1406 | ret = save_ust_channel(writer, ust_chan, session->ust_session); |
1407 | if (ret) { | |
1408 | rcu_read_unlock(); | |
1409 | goto end; | |
1410 | } | |
1411 | } | |
1412 | } | |
1413 | rcu_read_unlock(); | |
1414 | ||
1415 | /* /channels */ | |
1416 | ret = config_writer_close_element(writer); | |
1417 | if (ret) { | |
1418 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1419 | goto end; | |
1420 | } | |
51755dc8 | 1421 | |
e8fcabef | 1422 | if (domain == LTTNG_DOMAIN_UST) { |
847a5916 | 1423 | ret = config_writer_open_element(writer, |
e8fcabef | 1424 | config_element_trackers); |
847a5916 JR |
1425 | if (ret) { |
1426 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1427 | goto end; | |
1428 | } | |
1429 | ||
e8fcabef | 1430 | ret = save_pid_tracker(writer, session, LTTNG_DOMAIN_UST); |
847a5916 | 1431 | if (ret) { |
847a5916 JR |
1432 | goto end; |
1433 | } | |
1434 | ||
e8fcabef | 1435 | /* /trackers */ |
847a5916 JR |
1436 | ret = config_writer_close_element(writer); |
1437 | if (ret) { | |
847a5916 JR |
1438 | goto end; |
1439 | } | |
e8fcabef | 1440 | } |
847a5916 | 1441 | |
e8fcabef JG |
1442 | /* /domain */ |
1443 | ret = config_writer_close_element(writer); | |
1444 | if (ret) { | |
1445 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1446 | goto end; | |
847a5916 | 1447 | } |
e8fcabef | 1448 | |
847a5916 | 1449 | end: |
847a5916 JR |
1450 | return ret; |
1451 | } | |
1452 | ||
fb198a11 JG |
1453 | static |
1454 | int save_domains(struct config_writer *writer, struct ltt_session *session) | |
1455 | { | |
1456 | int ret = 0; | |
1457 | ||
1458 | assert(writer); | |
1459 | assert(session); | |
1460 | ||
1461 | if (!session->kernel_session && !session->ust_session) { | |
1462 | goto end; | |
1463 | } | |
1464 | ||
1465 | ret = config_writer_open_element(writer, config_element_domains); | |
1466 | if (ret) { | |
1467 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1468 | goto end; | |
1469 | } | |
1470 | ||
1471 | ||
1472 | if (session->kernel_session) { | |
1473 | ret = config_writer_open_element(writer, | |
1474 | config_element_domain); | |
1475 | if (ret) { | |
1476 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1477 | goto end; | |
1478 | } | |
1479 | ||
1480 | ret = save_kernel_session(writer, session); | |
1481 | if (ret) { | |
1482 | goto end; | |
1483 | } | |
1484 | ||
847a5916 JR |
1485 | ret = config_writer_open_element(writer, |
1486 | config_element_trackers); | |
1487 | if (ret) { | |
1488 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1489 | goto end; | |
1490 | } | |
1491 | ||
1492 | ret = save_pid_tracker(writer, session, LTTNG_DOMAIN_KERNEL); | |
1493 | if (ret) { | |
1494 | goto end; | |
1495 | } | |
1496 | ||
1497 | /* /trackers */ | |
1498 | ret = config_writer_close_element(writer); | |
1499 | if (ret) { | |
1500 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1501 | goto end; | |
1502 | } | |
fb198a11 JG |
1503 | /* /domain */ |
1504 | ret = config_writer_close_element(writer); | |
1505 | if (ret) { | |
1506 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1507 | goto end; | |
1508 | } | |
1509 | } | |
1510 | ||
1511 | if (session->ust_session) { | |
51755dc8 | 1512 | ret = save_ust_domain(writer, session, LTTNG_DOMAIN_UST); |
fb198a11 JG |
1513 | if (ret) { |
1514 | goto end; | |
1515 | } | |
1516 | ||
51755dc8 | 1517 | ret = save_ust_domain(writer, session, LTTNG_DOMAIN_JUL); |
fb198a11 | 1518 | if (ret) { |
fb198a11 JG |
1519 | goto end; |
1520 | } | |
fb198a11 | 1521 | |
51755dc8 JG |
1522 | ret = save_ust_domain(writer, session, LTTNG_DOMAIN_LOG4J); |
1523 | if (ret) { | |
1524 | goto end; | |
1525 | } | |
65d72c41 | 1526 | |
51755dc8 JG |
1527 | ret = save_ust_domain(writer, session, LTTNG_DOMAIN_PYTHON); |
1528 | if (ret) { | |
1529 | goto end; | |
fb198a11 JG |
1530 | } |
1531 | } | |
1532 | ||
1533 | /* /domains */ | |
1534 | ret = config_writer_close_element(writer); | |
1535 | if (ret) { | |
1536 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1537 | goto end; | |
1538 | } | |
1539 | end: | |
1540 | return ret; | |
1541 | } | |
1542 | ||
1543 | static | |
1544 | int save_consumer_output(struct config_writer *writer, | |
1545 | struct consumer_output *output) | |
1546 | { | |
1547 | int ret; | |
1548 | ||
1549 | assert(writer); | |
1550 | assert(output); | |
1551 | ||
1552 | ret = config_writer_open_element(writer, config_element_consumer_output); | |
1553 | if (ret) { | |
1554 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1555 | goto end; | |
1556 | } | |
1557 | ||
1558 | ret = config_writer_write_element_bool(writer, config_element_enabled, | |
1559 | output->enabled); | |
1560 | if (ret) { | |
1561 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1562 | goto end; | |
1563 | } | |
1564 | ||
1565 | ret = config_writer_open_element(writer, config_element_destination); | |
1566 | if (ret) { | |
1567 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1568 | goto end; | |
1569 | } | |
1570 | ||
1571 | switch (output->type) { | |
1572 | case CONSUMER_DST_LOCAL: | |
1573 | ret = config_writer_write_element_string(writer, | |
1574 | config_element_path, output->dst.trace_path); | |
1575 | if (ret) { | |
1576 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1577 | goto end; | |
1578 | } | |
1579 | break; | |
1580 | case CONSUMER_DST_NET: | |
1581 | { | |
1582 | char *uri; | |
1583 | ||
1584 | uri = zmalloc(PATH_MAX); | |
1585 | if (!uri) { | |
1586 | ret = LTTNG_ERR_NOMEM; | |
1587 | goto end; | |
1588 | } | |
1589 | ||
1590 | ret = config_writer_open_element(writer, config_element_net_output); | |
1591 | if (ret) { | |
1592 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1593 | goto end_net_output; | |
1594 | } | |
1595 | ||
1596 | if (output->dst.net.control_isset && | |
1597 | output->dst.net.data_isset) { | |
1598 | ret = uri_to_str_url(&output->dst.net.control, uri, PATH_MAX); | |
1599 | if (ret < 0) { | |
1600 | ret = LTTNG_ERR_INVALID; | |
1601 | goto end_net_output; | |
1602 | } | |
1603 | ||
1604 | ret = config_writer_write_element_string(writer, | |
1605 | config_element_control_uri, uri); | |
1606 | if (ret) { | |
1607 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1608 | goto end_net_output; | |
1609 | } | |
1610 | ||
1611 | ret = uri_to_str_url(&output->dst.net.data, uri, PATH_MAX); | |
1612 | if (ret < 0) { | |
1613 | ret = LTTNG_ERR_INVALID; | |
1614 | goto end_net_output; | |
1615 | } | |
1616 | ||
1617 | ret = config_writer_write_element_string(writer, | |
1618 | config_element_data_uri, uri); | |
1619 | if (ret) { | |
1620 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1621 | goto end_net_output; | |
1622 | } | |
1623 | ||
1624 | end_net_output: | |
1625 | free(uri); | |
1626 | if (ret) { | |
1627 | goto end; | |
1628 | } | |
1629 | } else { | |
1630 | ret = !output->dst.net.control_isset ? | |
1631 | LTTNG_ERR_URL_CTRL_MISS : | |
1632 | LTTNG_ERR_URL_DATA_MISS; | |
c39270e5 | 1633 | free(uri); |
fb198a11 JG |
1634 | goto end; |
1635 | } | |
1636 | ||
1637 | ret = config_writer_close_element(writer); | |
1638 | if (ret) { | |
1639 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1640 | goto end; | |
1641 | } | |
1642 | break; | |
1643 | } | |
1644 | default: | |
1645 | ERR("Unsupported consumer output type."); | |
1646 | ret = LTTNG_ERR_INVALID; | |
1647 | goto end; | |
1648 | } | |
1649 | ||
1650 | /* /destination */ | |
1651 | ret = config_writer_close_element(writer); | |
1652 | if (ret) { | |
1653 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1654 | goto end; | |
1655 | } | |
1656 | ||
1657 | /* /consumer_output */ | |
1658 | ret = config_writer_close_element(writer); | |
1659 | if (ret) { | |
1660 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1661 | goto end; | |
1662 | } | |
1663 | end: | |
1664 | return ret; | |
1665 | } | |
1666 | ||
1667 | static | |
1668 | int save_snapshot_outputs(struct config_writer *writer, | |
1669 | struct snapshot *snapshot) | |
1670 | { | |
1671 | int ret; | |
1672 | struct lttng_ht_iter iter; | |
1673 | struct snapshot_output *output; | |
1674 | ||
1675 | assert(writer); | |
1676 | assert(snapshot); | |
1677 | ||
1678 | ret = config_writer_open_element(writer, config_element_snapshot_outputs); | |
1679 | if (ret) { | |
1680 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1681 | goto end; | |
1682 | } | |
1683 | ||
1684 | rcu_read_lock(); | |
1685 | cds_lfht_for_each_entry(snapshot->output_ht->ht, &iter.iter, output, | |
1686 | node.node) { | |
1687 | ret = config_writer_open_element(writer, | |
1688 | config_element_output); | |
1689 | if (ret) { | |
1690 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1691 | goto end_unlock; | |
1692 | } | |
1693 | ||
1694 | ret = config_writer_write_element_string(writer, | |
1695 | config_element_name, output->name); | |
1696 | if (ret) { | |
1697 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1698 | goto end_unlock; | |
1699 | } | |
1700 | ||
1701 | ret = config_writer_write_element_unsigned_int(writer, | |
1702 | config_element_max_size, output->max_size); | |
1703 | if (ret) { | |
1704 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1705 | goto end_unlock; | |
1706 | } | |
1707 | ||
1708 | ret = save_consumer_output(writer, output->consumer); | |
1709 | if (ret) { | |
1710 | goto end_unlock; | |
1711 | } | |
1712 | ||
1713 | /* /output */ | |
1714 | ret = config_writer_close_element(writer); | |
1715 | if (ret) { | |
1716 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1717 | goto end_unlock; | |
1718 | } | |
1719 | } | |
1720 | rcu_read_unlock(); | |
1721 | ||
1722 | /* /snapshot_outputs */ | |
1723 | ret = config_writer_close_element(writer); | |
1724 | if (ret) { | |
1725 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1726 | goto end; | |
1727 | } | |
1728 | ||
1729 | end: | |
1730 | return ret; | |
1731 | end_unlock: | |
1732 | rcu_read_unlock(); | |
1733 | return ret; | |
1734 | } | |
1735 | ||
1736 | static | |
1737 | int save_session_output(struct config_writer *writer, | |
1738 | struct ltt_session *session) | |
1739 | { | |
1740 | int ret; | |
1741 | ||
1742 | assert(writer); | |
1743 | assert(session); | |
1744 | ||
1745 | if ((session->snapshot_mode && session->snapshot.nb_output == 0) || | |
1746 | (!session->snapshot_mode && !session->consumer)) { | |
1747 | /* Session is in no output mode */ | |
1748 | ret = 0; | |
1749 | goto end; | |
1750 | } | |
1751 | ||
1752 | ret = config_writer_open_element(writer, config_element_output); | |
1753 | if (ret) { | |
1754 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1755 | goto end; | |
1756 | } | |
1757 | ||
1758 | if (session->snapshot_mode) { | |
1759 | ret = save_snapshot_outputs(writer, &session->snapshot); | |
1760 | if (ret) { | |
1761 | goto end; | |
1762 | } | |
1763 | } else { | |
1764 | if (session->consumer) { | |
1765 | ret = save_consumer_output(writer, session->consumer); | |
1766 | if (ret) { | |
1767 | goto end; | |
1768 | } | |
1769 | } | |
1770 | } | |
1771 | ||
1772 | /* /output */ | |
1773 | ret = config_writer_close_element(writer); | |
1774 | if (ret) { | |
1775 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1776 | goto end; | |
1777 | } | |
1778 | end: | |
1779 | return ret; | |
1780 | } | |
1781 | ||
1782 | /* | |
1783 | * Save the given session. | |
1784 | * | |
1785 | * Return 0 on success else a LTTNG_ERR* code. | |
1786 | */ | |
1787 | static | |
1788 | int save_session(struct ltt_session *session, | |
1789 | struct lttng_save_session_attr *attr, lttng_sock_cred *creds) | |
1790 | { | |
1791 | int ret, fd; | |
db471218 | 1792 | unsigned int file_opened = 0; /* Indicate if the file has been opened */ |
fb198a11 JG |
1793 | char config_file_path[PATH_MAX]; |
1794 | size_t len; | |
1795 | struct config_writer *writer = NULL; | |
1796 | size_t session_name_len; | |
1797 | const char *provided_path; | |
1798 | ||
1799 | assert(session); | |
1800 | assert(attr); | |
1801 | assert(creds); | |
1802 | ||
1803 | session_name_len = strlen(session->name); | |
95a29ab8 | 1804 | memset(config_file_path, 0, sizeof(config_file_path)); |
fb198a11 JG |
1805 | |
1806 | if (!session_access_ok(session, | |
1807 | LTTNG_SOCK_GET_UID_CRED(creds), | |
1808 | LTTNG_SOCK_GET_GID_CRED(creds))) { | |
1809 | ret = LTTNG_ERR_EPERM; | |
1810 | goto end; | |
1811 | } | |
1812 | ||
1813 | provided_path = lttng_save_session_attr_get_output_url(attr); | |
1814 | if (provided_path) { | |
95a29ab8 | 1815 | DBG3("Save session in provided path %s", provided_path); |
fb198a11 | 1816 | len = strlen(provided_path); |
d2992717 | 1817 | if (len >= sizeof(config_file_path)) { |
fb198a11 JG |
1818 | ret = LTTNG_ERR_SET_URL; |
1819 | goto end; | |
1820 | } | |
1821 | strncpy(config_file_path, provided_path, len); | |
1822 | } else { | |
7e078ad1 | 1823 | ssize_t ret_len; |
fb198a11 JG |
1824 | char *home_dir = utils_get_user_home_dir( |
1825 | LTTNG_SOCK_GET_UID_CRED(creds)); | |
1826 | if (!home_dir) { | |
1827 | ret = LTTNG_ERR_SET_URL; | |
1828 | goto end; | |
1829 | } | |
1830 | ||
d2992717 | 1831 | ret_len = snprintf(config_file_path, sizeof(config_file_path), |
fb198a11 JG |
1832 | DEFAULT_SESSION_HOME_CONFIGPATH, home_dir); |
1833 | free(home_dir); | |
7e078ad1 | 1834 | if (ret_len < 0) { |
fb198a11 JG |
1835 | PERROR("snprintf save session"); |
1836 | ret = LTTNG_ERR_SET_URL; | |
1837 | goto end; | |
1838 | } | |
7e078ad1 | 1839 | len = ret_len; |
fb198a11 JG |
1840 | } |
1841 | ||
1842 | /* | |
d2992717 DG |
1843 | * Check the path fits in the config file path dst including the '/' |
1844 | * followed by trailing .lttng extension and the NULL terminated string. | |
fb198a11 | 1845 | */ |
d2992717 DG |
1846 | if ((len + session_name_len + 2 + |
1847 | sizeof(DEFAULT_SESSION_CONFIG_FILE_EXTENSION)) | |
1848 | > sizeof(config_file_path)) { | |
fb198a11 JG |
1849 | ret = LTTNG_ERR_SET_URL; |
1850 | goto end; | |
1851 | } | |
1852 | ||
1853 | ret = run_as_mkdir_recursive(config_file_path, S_IRWXU | S_IRWXG, | |
1854 | LTTNG_SOCK_GET_UID_CRED(creds), LTTNG_SOCK_GET_GID_CRED(creds)); | |
1855 | if (ret) { | |
1856 | ret = LTTNG_ERR_SET_URL; | |
1857 | goto end; | |
1858 | } | |
1859 | ||
d2992717 DG |
1860 | /* |
1861 | * At this point, we know that everything fits in the buffer. Validation | |
1862 | * was done just above. | |
1863 | */ | |
fb198a11 JG |
1864 | config_file_path[len++] = '/'; |
1865 | strncpy(config_file_path + len, session->name, session_name_len); | |
1866 | len += session_name_len; | |
1867 | strcpy(config_file_path + len, DEFAULT_SESSION_CONFIG_FILE_EXTENSION); | |
95a29ab8 DG |
1868 | len += sizeof(DEFAULT_SESSION_CONFIG_FILE_EXTENSION); |
1869 | config_file_path[len] = '\0'; | |
fb198a11 JG |
1870 | |
1871 | if (!access(config_file_path, F_OK) && !attr->overwrite) { | |
f9b57ab2 DG |
1872 | /* File exists, notify the user since the overwrite flag is off. */ |
1873 | ret = LTTNG_ERR_SAVE_FILE_EXIST; | |
fb198a11 JG |
1874 | goto end; |
1875 | } | |
1876 | ||
1877 | fd = run_as_open(config_file_path, O_CREAT | O_WRONLY | O_TRUNC, | |
1878 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP, | |
1879 | LTTNG_SOCK_GET_UID_CRED(creds), LTTNG_SOCK_GET_GID_CRED(creds)); | |
1880 | if (fd < 0) { | |
1881 | PERROR("Could not create configuration file"); | |
1882 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1883 | goto end; | |
1884 | } | |
db471218 | 1885 | file_opened = 1; |
fb198a11 | 1886 | |
705bb62f | 1887 | writer = config_writer_create(fd, 1); |
fb198a11 JG |
1888 | if (!writer) { |
1889 | ret = LTTNG_ERR_NOMEM; | |
1890 | goto end; | |
1891 | } | |
1892 | ||
1893 | ret = config_writer_open_element(writer, config_element_sessions); | |
1894 | if (ret) { | |
1895 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1896 | goto end; | |
1897 | } | |
1898 | ||
1899 | ret = config_writer_open_element(writer, config_element_session); | |
1900 | if (ret) { | |
1901 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1902 | goto end; | |
1903 | } | |
1904 | ||
1905 | ret = config_writer_write_element_string(writer, config_element_name, | |
1906 | session->name); | |
1907 | if (ret) { | |
1908 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1909 | goto end; | |
1910 | } | |
1911 | ||
9e7c9f56 JR |
1912 | if(session->shm_path[0] != '\0') { |
1913 | ret = config_writer_write_element_string(writer, | |
1914 | config_element_shared_memory_path, | |
1915 | session->shm_path); | |
1916 | if (ret) { | |
1917 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1918 | goto end; | |
1919 | } | |
1920 | } | |
1921 | ||
fb198a11 JG |
1922 | ret = save_domains(writer, session); |
1923 | if (ret) { | |
1924 | goto end; | |
1925 | } | |
1926 | ||
1927 | ret = config_writer_write_element_bool(writer, config_element_started, | |
8382cf6f | 1928 | session->active); |
fb198a11 JG |
1929 | if (ret) { |
1930 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1931 | goto end; | |
1932 | } | |
1933 | ||
1934 | if (session->snapshot_mode || session->live_timer) { | |
1935 | ret = config_writer_open_element(writer, config_element_attributes); | |
1936 | if (ret) { | |
1937 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1938 | goto end; | |
1939 | } | |
1940 | ||
1941 | if (session->snapshot_mode) { | |
1942 | ret = config_writer_write_element_bool(writer, | |
1943 | config_element_snapshot_mode, 1); | |
1944 | if (ret) { | |
1945 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1946 | goto end; | |
1947 | } | |
1948 | } else { | |
d98ad589 | 1949 | ret = config_writer_write_element_unsigned_int(writer, |
fb198a11 JG |
1950 | config_element_live_timer_interval, session->live_timer); |
1951 | if (ret) { | |
1952 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1953 | goto end; | |
1954 | } | |
1955 | } | |
1956 | ||
1957 | /* /attributes */ | |
1958 | ret = config_writer_close_element(writer); | |
1959 | if (ret) { | |
1960 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1961 | goto end; | |
1962 | } | |
1963 | } | |
1964 | ||
1965 | ret = save_session_output(writer, session); | |
1966 | if (ret) { | |
1967 | goto end; | |
1968 | } | |
1969 | ||
1970 | /* /session */ | |
1971 | ret = config_writer_close_element(writer); | |
1972 | if (ret) { | |
1973 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1974 | goto end; | |
1975 | } | |
1976 | ||
1977 | /* /sessions */ | |
1978 | ret = config_writer_close_element(writer); | |
1979 | if (ret) { | |
1980 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1981 | goto end; | |
1982 | } | |
1983 | end: | |
1984 | if (writer && config_writer_destroy(writer)) { | |
1985 | /* Preserve the original error code */ | |
1986 | ret = ret ? ret : LTTNG_ERR_SAVE_IO_FAIL; | |
1987 | } | |
1988 | if (ret) { | |
1989 | /* Delete file in case of error */ | |
db471218 | 1990 | if (file_opened && unlink(config_file_path)) { |
fb198a11 JG |
1991 | PERROR("Unlinking XML session configuration."); |
1992 | } | |
1993 | } | |
1994 | ||
1995 | return ret; | |
1996 | } | |
1997 | ||
1998 | int cmd_save_sessions(struct lttng_save_session_attr *attr, | |
1999 | lttng_sock_cred *creds) | |
2000 | { | |
2001 | int ret; | |
2002 | const char *session_name; | |
2003 | struct ltt_session *session; | |
2004 | ||
2005 | session_lock_list(); | |
2006 | ||
2007 | session_name = lttng_save_session_attr_get_session_name(attr); | |
2008 | if (session_name) { | |
2009 | session = session_find_by_name(session_name); | |
2010 | if (!session) { | |
2011 | ret = LTTNG_ERR_SESS_NOT_FOUND; | |
2012 | goto end; | |
2013 | } | |
2014 | ||
2015 | session_lock(session); | |
2016 | ret = save_session(session, attr, creds); | |
2017 | session_unlock(session); | |
2018 | if (ret) { | |
2019 | goto end; | |
2020 | } | |
2021 | } else { | |
2022 | struct ltt_session_list *list = session_get_list(); | |
2023 | ||
2024 | cds_list_for_each_entry(session, &list->head, list) { | |
2025 | session_lock(session); | |
2026 | ret = save_session(session, attr, creds); | |
2027 | session_unlock(session); | |
2028 | ||
2029 | /* Don't abort if we don't have the required permissions. */ | |
2030 | if (ret && ret != LTTNG_ERR_EPERM) { | |
2031 | goto end; | |
2032 | } | |
2033 | } | |
2034 | } | |
2035 | ret = LTTNG_OK; | |
2036 | ||
2037 | end: | |
2038 | session_unlock_list(); | |
2039 | return ret; | |
2040 | } |