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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 | ||
35460079 | 33 | #include "kernel.h" |
fb198a11 JG |
34 | #include "save.h" |
35 | #include "session.h" | |
0de3eda1 | 36 | #include "syscall.h" |
fb198a11 JG |
37 | #include "trace-ust.h" |
38 | ||
39 | static | |
40 | int save_kernel_channel_attributes(struct config_writer *writer, | |
41 | struct lttng_channel_attr *attr) | |
42 | { | |
43 | int ret; | |
44 | ||
45 | ret = config_writer_write_element_string(writer, | |
46 | config_element_overwrite_mode, | |
47 | attr->overwrite ? config_overwrite_mode_overwrite : | |
48 | config_overwrite_mode_discard); | |
49 | if (ret) { | |
50 | goto end; | |
51 | } | |
52 | ||
53 | ret = config_writer_write_element_unsigned_int(writer, | |
54 | config_element_subbuf_size, attr->subbuf_size); | |
55 | if (ret) { | |
56 | goto end; | |
57 | } | |
58 | ||
59 | ret = config_writer_write_element_unsigned_int(writer, | |
60 | config_element_num_subbuf, | |
61 | attr->num_subbuf); | |
62 | if (ret) { | |
63 | goto end; | |
64 | } | |
65 | ||
66 | ret = config_writer_write_element_unsigned_int(writer, | |
67 | config_element_switch_timer_interval, | |
68 | attr->switch_timer_interval); | |
69 | if (ret) { | |
70 | goto end; | |
71 | } | |
72 | ||
73 | ret = config_writer_write_element_unsigned_int(writer, | |
74 | config_element_read_timer_interval, | |
75 | attr->read_timer_interval); | |
76 | if (ret) { | |
77 | goto end; | |
78 | } | |
79 | ||
80 | ret = config_writer_write_element_string(writer, | |
81 | config_element_output_type, | |
82 | attr->output == LTTNG_EVENT_SPLICE ? | |
83 | config_output_type_splice : config_output_type_mmap); | |
84 | if (ret) { | |
85 | goto end; | |
86 | } | |
87 | ||
88 | ret = config_writer_write_element_unsigned_int(writer, | |
89 | config_element_tracefile_size, attr->tracefile_size); | |
90 | if (ret) { | |
91 | goto end; | |
92 | } | |
93 | ||
94 | ret = config_writer_write_element_unsigned_int(writer, | |
95 | config_element_tracefile_count, | |
96 | attr->tracefile_count); | |
97 | if (ret) { | |
98 | goto end; | |
99 | } | |
100 | ||
101 | ret = config_writer_write_element_unsigned_int(writer, | |
102 | config_element_live_timer_interval, | |
103 | attr->live_timer_interval); | |
104 | if (ret) { | |
105 | goto end; | |
106 | } | |
107 | end: | |
108 | return ret ? LTTNG_ERR_SAVE_IO_FAIL : 0; | |
109 | } | |
110 | ||
111 | static | |
112 | int save_ust_channel_attributes(struct config_writer *writer, | |
113 | struct lttng_ust_channel_attr *attr) | |
114 | { | |
115 | int ret; | |
116 | ||
117 | ret = config_writer_write_element_string(writer, | |
118 | config_element_overwrite_mode, | |
119 | attr->overwrite ? config_overwrite_mode_overwrite : | |
120 | config_overwrite_mode_discard); | |
121 | if (ret) { | |
122 | goto end; | |
123 | } | |
124 | ||
125 | ret = config_writer_write_element_unsigned_int(writer, | |
126 | config_element_subbuf_size, attr->subbuf_size); | |
127 | if (ret) { | |
128 | goto end; | |
129 | } | |
130 | ||
131 | ret = config_writer_write_element_unsigned_int(writer, | |
132 | config_element_num_subbuf, | |
133 | attr->num_subbuf); | |
134 | if (ret) { | |
135 | goto end; | |
136 | } | |
137 | ||
138 | ret = config_writer_write_element_unsigned_int(writer, | |
139 | config_element_switch_timer_interval, | |
140 | attr->switch_timer_interval); | |
141 | if (ret) { | |
142 | goto end; | |
143 | } | |
144 | ||
145 | ret = config_writer_write_element_unsigned_int(writer, | |
146 | config_element_read_timer_interval, | |
147 | attr->read_timer_interval); | |
148 | if (ret) { | |
149 | goto end; | |
150 | } | |
151 | ||
152 | ret = config_writer_write_element_string(writer, | |
153 | config_element_output_type, | |
154 | attr->output == LTTNG_UST_MMAP ? | |
155 | config_output_type_mmap : config_output_type_splice); | |
156 | if (ret) { | |
157 | goto end; | |
158 | } | |
159 | end: | |
160 | return ret ? LTTNG_ERR_SAVE_IO_FAIL : 0; | |
161 | } | |
162 | ||
163 | static | |
164 | const char *get_kernel_instrumentation_string( | |
165 | enum lttng_kernel_instrumentation instrumentation) | |
166 | { | |
167 | const char *instrumentation_string; | |
168 | ||
169 | switch (instrumentation) { | |
170 | case LTTNG_KERNEL_ALL: | |
171 | instrumentation_string = config_event_type_all; | |
172 | break; | |
173 | case LTTNG_KERNEL_TRACEPOINT: | |
174 | instrumentation_string = config_event_type_tracepoint; | |
175 | break; | |
176 | case LTTNG_KERNEL_KPROBE: | |
177 | instrumentation_string = config_event_type_kprobe; | |
178 | break; | |
179 | case LTTNG_KERNEL_FUNCTION: | |
180 | instrumentation_string = config_event_type_function; | |
181 | break; | |
182 | case LTTNG_KERNEL_KRETPROBE: | |
183 | instrumentation_string = config_event_type_kretprobe; | |
184 | break; | |
185 | case LTTNG_KERNEL_NOOP: | |
186 | instrumentation_string = config_event_type_noop; | |
187 | break; | |
188 | case LTTNG_KERNEL_SYSCALL: | |
189 | instrumentation_string = config_event_type_syscall; | |
190 | break; | |
191 | default: | |
192 | instrumentation_string = NULL; | |
193 | } | |
194 | ||
195 | return instrumentation_string; | |
196 | } | |
197 | ||
198 | static | |
199 | const char *get_kernel_context_type_string( | |
200 | enum lttng_kernel_context_type context_type) | |
201 | { | |
202 | const char *context_type_string; | |
203 | ||
204 | switch (context_type) { | |
205 | case LTTNG_KERNEL_CONTEXT_PID: | |
206 | context_type_string = config_event_context_pid; | |
207 | break; | |
208 | case LTTNG_KERNEL_CONTEXT_PROCNAME: | |
209 | context_type_string = config_event_context_procname; | |
210 | break; | |
211 | case LTTNG_KERNEL_CONTEXT_PRIO: | |
212 | context_type_string = config_event_context_prio; | |
213 | break; | |
214 | case LTTNG_KERNEL_CONTEXT_NICE: | |
215 | context_type_string = config_event_context_nice; | |
216 | break; | |
217 | case LTTNG_KERNEL_CONTEXT_VPID: | |
218 | context_type_string = config_event_context_vpid; | |
219 | break; | |
220 | case LTTNG_KERNEL_CONTEXT_TID: | |
221 | context_type_string = config_event_context_tid; | |
222 | break; | |
223 | case LTTNG_KERNEL_CONTEXT_VTID: | |
224 | context_type_string = config_event_context_vtid; | |
225 | break; | |
226 | case LTTNG_KERNEL_CONTEXT_PPID: | |
227 | context_type_string = config_event_context_ppid; | |
228 | break; | |
229 | case LTTNG_KERNEL_CONTEXT_VPPID: | |
230 | context_type_string = config_event_context_vppid; | |
231 | break; | |
232 | case LTTNG_KERNEL_CONTEXT_HOSTNAME: | |
233 | context_type_string = config_event_context_hostname; | |
234 | break; | |
235 | default: | |
236 | context_type_string = NULL; | |
237 | } | |
238 | ||
239 | return context_type_string; | |
240 | } | |
241 | ||
242 | static | |
243 | const char *get_ust_context_type_string( | |
244 | enum lttng_ust_context_type context_type) | |
245 | { | |
246 | const char *context_type_string; | |
247 | ||
248 | switch (context_type) { | |
249 | case LTTNG_UST_CONTEXT_PROCNAME: | |
250 | context_type_string = config_event_context_procname; | |
251 | break; | |
252 | case LTTNG_UST_CONTEXT_VPID: | |
253 | context_type_string = config_event_context_vpid; | |
254 | break; | |
255 | case LTTNG_UST_CONTEXT_VTID: | |
256 | context_type_string = config_event_context_vtid; | |
257 | break; | |
258 | case LTTNG_UST_CONTEXT_IP: | |
259 | context_type_string = config_event_context_ip; | |
260 | break; | |
261 | case LTTNG_UST_CONTEXT_PTHREAD_ID: | |
262 | context_type_string = config_event_context_pthread_id; | |
263 | break; | |
e885a367 | 264 | case LTTNG_UST_CONTEXT_PERF_THREAD_COUNTER: |
14ce5bd8 JG |
265 | /* |
266 | * Error, should not be stored in the XML, perf contexts | |
267 | * are stored as a node of type event_perf_context_type. | |
268 | */ | |
fb198a11 JG |
269 | default: |
270 | context_type_string = NULL; | |
e885a367 | 271 | break; |
fb198a11 JG |
272 | } |
273 | ||
274 | return context_type_string; | |
275 | } | |
276 | ||
277 | static | |
278 | const char *get_buffer_type_string( | |
279 | enum lttng_buffer_type buffer_type) | |
280 | { | |
281 | const char *buffer_type_string; | |
282 | ||
283 | switch (buffer_type) { | |
284 | case LTTNG_BUFFER_PER_PID: | |
285 | buffer_type_string = config_buffer_type_per_pid; | |
286 | break; | |
287 | case LTTNG_BUFFER_PER_UID: | |
288 | buffer_type_string = config_buffer_type_per_uid; | |
289 | break; | |
290 | case LTTNG_BUFFER_GLOBAL: | |
291 | buffer_type_string = config_buffer_type_global; | |
292 | break; | |
293 | default: | |
294 | buffer_type_string = NULL; | |
295 | } | |
296 | ||
297 | return buffer_type_string; | |
298 | } | |
299 | ||
300 | static | |
301 | const char *get_loglevel_type_string( | |
302 | enum lttng_ust_loglevel_type loglevel_type) | |
303 | { | |
304 | const char *loglevel_type_string; | |
305 | ||
306 | switch (loglevel_type) { | |
307 | case LTTNG_UST_LOGLEVEL_ALL: | |
308 | loglevel_type_string = config_loglevel_type_all; | |
309 | break; | |
310 | case LTTNG_UST_LOGLEVEL_RANGE: | |
311 | loglevel_type_string = config_loglevel_type_range; | |
312 | break; | |
313 | case LTTNG_UST_LOGLEVEL_SINGLE: | |
314 | loglevel_type_string = config_loglevel_type_single; | |
315 | break; | |
316 | default: | |
317 | loglevel_type_string = NULL; | |
318 | } | |
319 | ||
320 | return loglevel_type_string; | |
321 | } | |
322 | ||
323 | static | |
324 | int save_kernel_event(struct config_writer *writer, | |
325 | struct ltt_kernel_event *event) | |
326 | { | |
327 | int ret; | |
328 | const char *instrumentation_type; | |
329 | ||
330 | ret = config_writer_open_element(writer, config_element_event); | |
331 | if (ret) { | |
332 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
333 | goto end; | |
334 | } | |
335 | ||
336 | if (event->event->name[0]) { | |
337 | ret = config_writer_write_element_string(writer, | |
338 | config_element_name, event->event->name); | |
339 | if (ret) { | |
340 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
341 | goto end; | |
342 | } | |
343 | } | |
344 | ||
345 | ret = config_writer_write_element_bool(writer, config_element_enabled, | |
346 | event->enabled); | |
347 | if (ret) { | |
348 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
349 | goto end; | |
350 | } | |
351 | ||
352 | instrumentation_type = get_kernel_instrumentation_string( | |
353 | event->event->instrumentation); | |
354 | if (!instrumentation_type) { | |
355 | ret = LTTNG_ERR_INVALID; | |
356 | goto end; | |
357 | } | |
358 | ||
359 | ret = config_writer_write_element_string(writer, config_element_type, | |
360 | instrumentation_type); | |
361 | if (ret) { | |
362 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
363 | goto end; | |
364 | } | |
365 | ||
50e5312e JG |
366 | if (event->filter_expression) { |
367 | ret = config_writer_write_element_string(writer, | |
368 | config_element_filter, | |
369 | event->filter_expression); | |
370 | if (ret) { | |
371 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
372 | goto end; | |
373 | } | |
374 | } | |
375 | ||
fb198a11 JG |
376 | if (event->event->instrumentation == LTTNG_KERNEL_FUNCTION || |
377 | event->event->instrumentation == LTTNG_KERNEL_KPROBE || | |
378 | event->event->instrumentation == LTTNG_KERNEL_KRETPROBE) { | |
379 | ||
380 | ret = config_writer_open_element(writer, | |
381 | config_element_attributes); | |
382 | if (ret) { | |
383 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
384 | goto end; | |
385 | } | |
386 | ||
387 | switch (event->event->instrumentation) { | |
0de3eda1 | 388 | case LTTNG_KERNEL_SYSCALL: |
fb198a11 JG |
389 | case LTTNG_KERNEL_FUNCTION: |
390 | ret = config_writer_open_element(writer, | |
391 | config_element_function_attributes); | |
392 | if (ret) { | |
393 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
394 | goto end; | |
395 | } | |
396 | ||
397 | ret = config_writer_write_element_string(writer, | |
398 | config_element_name, | |
399 | event->event->u.ftrace.symbol_name); | |
400 | if (ret) { | |
401 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
402 | goto end; | |
403 | } | |
404 | ||
405 | /* /function attributes */ | |
406 | ret = config_writer_close_element(writer); | |
407 | if (ret) { | |
408 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
409 | goto end; | |
410 | } | |
411 | break; | |
412 | case LTTNG_KERNEL_KPROBE: | |
413 | case LTTNG_KERNEL_KRETPROBE: | |
414 | { | |
415 | const char *symbol_name; | |
416 | uint64_t addr; | |
417 | uint64_t offset; | |
418 | ||
419 | if (event->event->instrumentation == | |
420 | LTTNG_KERNEL_KPROBE) { | |
421 | /* | |
422 | * Comments in lttng-kernel.h mention that | |
423 | * either addr or symbol_name are set, not both. | |
424 | */ | |
425 | addr = event->event->u.kprobe.addr; | |
426 | offset = event->event->u.kprobe.offset; | |
427 | symbol_name = addr ? NULL : | |
428 | event->event->u.kprobe.symbol_name; | |
429 | } else { | |
430 | symbol_name = | |
431 | event->event->u.kretprobe.symbol_name; | |
432 | addr = event->event->u.kretprobe.addr; | |
433 | offset = event->event->u.kretprobe.offset; | |
434 | } | |
435 | ||
436 | ret = config_writer_open_element(writer, | |
437 | config_element_probe_attributes); | |
438 | if (ret) { | |
439 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
440 | goto end; | |
441 | } | |
442 | ||
443 | if (symbol_name) { | |
444 | ret = config_writer_write_element_string(writer, | |
445 | config_element_symbol_name, | |
446 | symbol_name); | |
447 | if (ret) { | |
448 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
449 | goto end; | |
450 | } | |
451 | } | |
452 | ||
453 | if (addr) { | |
454 | ret = config_writer_write_element_unsigned_int( | |
455 | writer, config_element_address, addr); | |
456 | if (ret) { | |
457 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
458 | goto end; | |
459 | } | |
460 | } | |
461 | ||
462 | if (offset) { | |
463 | ret = config_writer_write_element_unsigned_int( | |
464 | writer, config_element_offset, offset); | |
465 | if (ret) { | |
466 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
467 | goto end; | |
468 | } | |
469 | } | |
470 | ||
471 | ret = config_writer_close_element(writer); | |
472 | if (ret) { | |
473 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
474 | goto end; | |
475 | } | |
476 | break; | |
477 | } | |
478 | default: | |
479 | ERR("Unsupported kernel instrumentation type."); | |
480 | ret = LTTNG_ERR_INVALID; | |
481 | goto end; | |
482 | } | |
483 | ||
484 | /* /attributes */ | |
485 | ret = config_writer_close_element(writer); | |
486 | if (ret) { | |
487 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
488 | goto end; | |
489 | } | |
490 | } | |
491 | ||
492 | /* /event */ | |
493 | ret = config_writer_close_element(writer); | |
494 | if (ret) { | |
495 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
496 | goto end; | |
497 | } | |
498 | end: | |
499 | return ret; | |
500 | } | |
501 | ||
0de3eda1 DG |
502 | static |
503 | int save_kernel_syscall(struct config_writer *writer, | |
504 | struct ltt_kernel_channel *kchan) | |
505 | { | |
506 | int ret, i; | |
507 | ssize_t count; | |
508 | struct lttng_event *events = NULL; | |
509 | ||
510 | assert(writer); | |
511 | assert(kchan); | |
512 | ||
513 | count = syscall_list_channel(kchan, &events, 0); | |
514 | if (!count) { | |
515 | /* No syscalls, just gracefully return. */ | |
516 | ret = 0; | |
517 | goto end; | |
518 | } | |
519 | ||
520 | for (i = 0; i < count; i++) { | |
521 | struct ltt_kernel_event *kevent; | |
522 | ||
523 | /* Create a temporary kevent in order to save it. */ | |
00a62084 MD |
524 | /* |
525 | * TODO: struct lttng_event does not really work for a filter, | |
526 | * but unfortunately, it is exposed as external API (and used as | |
527 | * internal representation. Using NULL meanwhile. | |
528 | */ | |
529 | kevent = trace_kernel_create_event(&events[i], | |
530 | NULL, NULL); | |
0de3eda1 DG |
531 | if (!kevent) { |
532 | ret = -ENOMEM; | |
533 | goto end; | |
534 | } | |
535 | /* Init list in order so the destroy call can del the node. */ | |
536 | CDS_INIT_LIST_HEAD(&kevent->list); | |
537 | ||
538 | ret = save_kernel_event(writer, kevent); | |
539 | trace_kernel_destroy_event(kevent); | |
540 | if (ret) { | |
541 | goto end; | |
542 | } | |
543 | } | |
544 | ||
545 | /* Everything went well */ | |
546 | ret = 0; | |
547 | ||
548 | end: | |
549 | free(events); | |
550 | return ret; | |
551 | } | |
552 | ||
fb198a11 JG |
553 | static |
554 | int save_kernel_events(struct config_writer *writer, | |
0de3eda1 | 555 | struct ltt_kernel_channel *kchan) |
fb198a11 JG |
556 | { |
557 | int ret; | |
558 | struct ltt_kernel_event *event; | |
559 | ||
560 | ret = config_writer_open_element(writer, config_element_events); | |
561 | if (ret) { | |
562 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
563 | goto end; | |
564 | } | |
565 | ||
0de3eda1 | 566 | cds_list_for_each_entry(event, &kchan->events_list.head, list) { |
fb198a11 JG |
567 | ret = save_kernel_event(writer, event); |
568 | if (ret) { | |
569 | goto end; | |
570 | } | |
571 | } | |
572 | ||
0de3eda1 DG |
573 | /* Save syscalls if any. */ |
574 | ret = save_kernel_syscall(writer, kchan); | |
575 | if (ret) { | |
576 | goto end; | |
577 | } | |
578 | ||
fb198a11 JG |
579 | /* /events */ |
580 | ret = config_writer_close_element(writer); | |
581 | if (ret) { | |
582 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
583 | goto end; | |
584 | } | |
585 | end: | |
586 | return ret; | |
587 | } | |
588 | ||
589 | static | |
590 | int save_ust_event(struct config_writer *writer, | |
591 | struct ltt_ust_event *event) | |
592 | { | |
593 | int ret; | |
594 | const char *loglevel_type_string; | |
595 | ||
596 | ret = config_writer_open_element(writer, config_element_event); | |
597 | if (ret) { | |
598 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
599 | goto end; | |
600 | } | |
601 | ||
602 | if (event->attr.name[0]) { | |
603 | ret = config_writer_write_element_string(writer, | |
604 | config_element_name, event->attr.name); | |
605 | if (ret) { | |
606 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
607 | goto end; | |
608 | } | |
609 | } | |
610 | ||
611 | ret = config_writer_write_element_bool(writer, config_element_enabled, | |
612 | event->enabled); | |
613 | if (ret) { | |
614 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
615 | goto end; | |
616 | } | |
617 | ||
618 | if (event->attr.instrumentation != LTTNG_UST_TRACEPOINT) { | |
619 | ERR("Unsupported UST instrumentation type."); | |
620 | ret = LTTNG_ERR_INVALID; | |
621 | goto end; | |
622 | } | |
623 | ret = config_writer_write_element_string(writer, config_element_type, | |
624 | config_event_type_tracepoint); | |
625 | if (ret) { | |
626 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
627 | goto end; | |
628 | } | |
629 | ||
630 | loglevel_type_string = get_loglevel_type_string( | |
631 | event->attr.loglevel_type); | |
632 | if (!loglevel_type_string) { | |
633 | ERR("Unsupported UST loglevel type."); | |
634 | ret = LTTNG_ERR_INVALID; | |
635 | goto end; | |
636 | } | |
637 | ||
638 | ret = config_writer_write_element_string(writer, | |
639 | config_element_loglevel_type, loglevel_type_string); | |
640 | if (ret) { | |
641 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
642 | goto end; | |
643 | } | |
644 | ||
645 | ret = config_writer_write_element_signed_int(writer, | |
646 | config_element_loglevel, event->attr.loglevel); | |
647 | if (ret) { | |
648 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
649 | goto end; | |
650 | } | |
651 | ||
652 | if (event->filter_expression) { | |
653 | ret = config_writer_write_element_string(writer, | |
654 | config_element_filter, event->filter_expression); | |
655 | if (ret) { | |
656 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
657 | goto end; | |
658 | } | |
659 | } | |
660 | ||
661 | if (event->exclusion && event->exclusion->count) { | |
662 | uint32_t i; | |
663 | ||
664 | ret = config_writer_open_element(writer, | |
665 | config_element_exclusions); | |
666 | if (ret) { | |
667 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
668 | goto end; | |
669 | } | |
670 | ||
671 | for (i = 0; i < event->exclusion->count; i++) { | |
672 | ret = config_writer_write_element_string(writer, | |
673 | config_element_exclusion, | |
674 | &event->exclusion->names[0][i]); | |
675 | if (ret) { | |
676 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
677 | goto end; | |
678 | } | |
679 | } | |
680 | ||
681 | /* /exclusions */ | |
682 | ret = config_writer_close_element(writer); | |
683 | if (ret) { | |
684 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
685 | goto end; | |
686 | } | |
687 | } | |
688 | ||
689 | /* /event */ | |
690 | ret = config_writer_close_element(writer); | |
691 | if (ret) { | |
692 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
693 | goto end; | |
694 | } | |
695 | end: | |
696 | return ret; | |
697 | } | |
698 | ||
699 | static | |
700 | int save_ust_events(struct config_writer *writer, | |
701 | struct lttng_ht *events) | |
702 | { | |
703 | int ret; | |
704 | struct ltt_ust_event *event; | |
705 | struct lttng_ht_node_str *node; | |
706 | struct lttng_ht_iter iter; | |
707 | ||
708 | ret = config_writer_open_element(writer, config_element_events); | |
709 | if (ret) { | |
710 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
711 | goto end; | |
712 | } | |
713 | ||
714 | rcu_read_lock(); | |
715 | cds_lfht_for_each_entry(events->ht, &iter.iter, node, node) { | |
716 | event = caa_container_of(node, struct ltt_ust_event, node); | |
717 | ||
10eabc1c JG |
718 | if (event->internal) { |
719 | /* Internal events must not be exposed to clients */ | |
720 | continue; | |
721 | } | |
fb198a11 JG |
722 | ret = save_ust_event(writer, event); |
723 | if (ret) { | |
724 | rcu_read_unlock(); | |
725 | goto end; | |
726 | } | |
727 | } | |
728 | rcu_read_unlock(); | |
729 | ||
730 | /* /events */ | |
731 | ret = config_writer_close_element(writer); | |
732 | if (ret) { | |
733 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
734 | goto end; | |
735 | } | |
736 | end: | |
737 | return ret; | |
738 | } | |
739 | ||
740 | static | |
741 | int save_kernel_context(struct config_writer *writer, | |
742 | struct lttng_kernel_context *ctx) | |
743 | { | |
744 | int ret = 0; | |
745 | ||
746 | if (!ctx) { | |
747 | goto end; | |
748 | } | |
749 | ||
fb198a11 JG |
750 | ret = config_writer_open_element(writer, config_element_context); |
751 | if (ret) { | |
752 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
753 | goto end; | |
754 | } | |
755 | ||
cba45eda | 756 | if (ctx->ctx == LTTNG_KERNEL_CONTEXT_PERF_CPU_COUNTER) { |
fb198a11 JG |
757 | ret = config_writer_open_element(writer, config_element_perf); |
758 | if (ret) { | |
759 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
760 | goto end; | |
761 | } | |
762 | ||
763 | ret = config_writer_write_element_unsigned_int(writer, | |
764 | config_element_type, ctx->u.perf_counter.type); | |
765 | if (ret) { | |
766 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
767 | goto end; | |
768 | } | |
769 | ||
770 | ret = config_writer_write_element_unsigned_int(writer, | |
771 | config_element_config, ctx->u.perf_counter.config); | |
772 | if (ret) { | |
773 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
774 | goto end; | |
775 | } | |
776 | ||
777 | ret = config_writer_write_element_string(writer, | |
778 | config_element_name, ctx->u.perf_counter.name); | |
779 | if (ret) { | |
780 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
781 | goto end; | |
782 | } | |
783 | ||
784 | /* /perf */ | |
785 | ret = config_writer_close_element(writer); | |
786 | if (ret) { | |
787 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
788 | goto end; | |
789 | } | |
790 | } else { | |
791 | const char *context_type_string = | |
792 | get_kernel_context_type_string(ctx->ctx); | |
793 | ||
794 | if (!context_type_string) { | |
795 | ERR("Unsupported kernel context type."); | |
796 | ret = LTTNG_ERR_INVALID; | |
797 | goto end; | |
798 | } | |
799 | ||
800 | ret = config_writer_write_element_string(writer, | |
801 | config_element_type, context_type_string); | |
802 | if (ret) { | |
803 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
804 | goto end; | |
805 | } | |
806 | } | |
807 | ||
808 | /* /context */ | |
809 | ret = config_writer_close_element(writer); | |
810 | if (ret) { | |
811 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
812 | goto end; | |
813 | } | |
814 | ||
645328ae DG |
815 | end: |
816 | return ret; | |
817 | } | |
818 | ||
819 | static | |
820 | int save_kernel_contexts(struct config_writer *writer, | |
821 | struct ltt_kernel_channel *kchan) | |
822 | { | |
823 | int ret; | |
824 | struct ltt_kernel_context *ctx; | |
825 | ||
2aa64052 JG |
826 | if (cds_list_empty(&kchan->ctx_list)) { |
827 | ret = 0; | |
828 | goto end; | |
829 | } | |
830 | ||
645328ae DG |
831 | ret = config_writer_open_element(writer, config_element_contexts); |
832 | if (ret) { | |
833 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
834 | goto end; | |
835 | } | |
836 | ||
837 | cds_list_for_each_entry(ctx, &kchan->ctx_list, list) { | |
838 | ret = save_kernel_context(writer, &ctx->ctx); | |
839 | if (ret) { | |
840 | goto end; | |
841 | } | |
842 | } | |
843 | ||
fb198a11 JG |
844 | /* /contexts */ |
845 | ret = config_writer_close_element(writer); | |
846 | if (ret) { | |
847 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
848 | goto end; | |
849 | } | |
850 | end: | |
851 | return ret; | |
852 | } | |
853 | ||
854 | static | |
855 | int save_ust_context(struct config_writer *writer, | |
856 | struct cds_list_head *ctx_list) | |
857 | { | |
858 | int ret; | |
859 | struct ltt_ust_context *ctx; | |
860 | ||
861 | assert(writer); | |
862 | assert(ctx_list); | |
863 | ||
864 | ret = config_writer_open_element(writer, config_element_contexts); | |
865 | if (ret) { | |
866 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
867 | goto end; | |
868 | } | |
869 | ||
870 | cds_list_for_each_entry(ctx, ctx_list, list) { | |
871 | const char *context_type_string; | |
872 | ||
fb198a11 JG |
873 | |
874 | ret = config_writer_open_element(writer, | |
875 | config_element_context); | |
876 | if (ret) { | |
877 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
878 | goto end; | |
879 | } | |
880 | ||
14ce5bd8 JG |
881 | if (ctx->ctx.ctx == LTTNG_UST_CONTEXT_PERF_THREAD_COUNTER) { |
882 | /* Perf contexts are saved as event_perf_context_type */ | |
883 | ret = config_writer_open_element(writer, | |
884 | config_element_perf); | |
885 | if (ret) { | |
886 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
887 | goto end; | |
888 | } | |
889 | ||
890 | ret = config_writer_write_element_unsigned_int(writer, | |
891 | config_element_type, | |
892 | ctx->ctx.u.perf_counter.type); | |
893 | if (ret) { | |
894 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
895 | goto end; | |
896 | } | |
897 | ||
898 | ret = config_writer_write_element_unsigned_int(writer, | |
899 | config_element_config, | |
900 | ctx->ctx.u.perf_counter.config); | |
901 | if (ret) { | |
902 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
903 | goto end; | |
904 | } | |
905 | ||
906 | ret = config_writer_write_element_string(writer, | |
907 | config_element_name, | |
908 | ctx->ctx.u.perf_counter.name); | |
909 | if (ret) { | |
910 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
911 | goto end; | |
912 | } | |
913 | ||
914 | /* /perf */ | |
915 | ret = config_writer_close_element(writer); | |
916 | if (ret) { | |
917 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
918 | goto end; | |
919 | } | |
920 | } else { | |
921 | /* Save context as event_context_type_type */ | |
922 | context_type_string = get_ust_context_type_string( | |
923 | ctx->ctx.ctx); | |
924 | if (!context_type_string) { | |
925 | ERR("Unsupported UST context type.") | |
926 | ret = LTTNG_ERR_INVALID; | |
927 | goto end; | |
928 | } | |
929 | ||
930 | ret = config_writer_write_element_string(writer, | |
931 | config_element_type, context_type_string); | |
932 | if (ret) { | |
933 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
934 | goto end; | |
935 | } | |
fb198a11 JG |
936 | } |
937 | ||
938 | /* /context */ | |
939 | ret = config_writer_close_element(writer); | |
940 | if (ret) { | |
941 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
942 | goto end; | |
943 | } | |
944 | } | |
945 | ||
946 | /* /contexts */ | |
947 | ret = config_writer_close_element(writer); | |
948 | if (ret) { | |
949 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
950 | goto end; | |
951 | } | |
952 | end: | |
953 | return ret; | |
954 | } | |
955 | ||
956 | static | |
957 | int save_kernel_channel(struct config_writer *writer, | |
958 | struct ltt_kernel_channel *kchan) | |
959 | { | |
960 | int ret; | |
961 | ||
962 | assert(writer); | |
963 | assert(kchan); | |
964 | ||
965 | ret = config_writer_open_element(writer, config_element_channel); | |
966 | if (ret) { | |
967 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
968 | goto end; | |
969 | } | |
970 | ||
971 | ret = config_writer_write_element_string(writer, config_element_name, | |
972 | kchan->channel->name); | |
973 | if (ret) { | |
974 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
975 | goto end; | |
976 | } | |
977 | ||
978 | ret = config_writer_write_element_bool(writer, config_element_enabled, | |
979 | kchan->channel->enabled); | |
980 | if (ret) { | |
981 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
982 | goto end; | |
983 | } | |
984 | ||
985 | ret = save_kernel_channel_attributes(writer, &kchan->channel->attr); | |
986 | if (ret) { | |
987 | goto end; | |
988 | } | |
989 | ||
0de3eda1 | 990 | ret = save_kernel_events(writer, kchan); |
fb198a11 JG |
991 | if (ret) { |
992 | goto end; | |
993 | } | |
994 | ||
645328ae | 995 | ret = save_kernel_contexts(writer, kchan); |
fb198a11 JG |
996 | if (ret) { |
997 | goto end; | |
998 | } | |
999 | ||
1000 | /* /channel */ | |
1001 | ret = config_writer_close_element(writer); | |
1002 | if (ret) { | |
1003 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1004 | goto end; | |
1005 | } | |
1006 | end: | |
1007 | return ret; | |
1008 | } | |
1009 | ||
1010 | static | |
1011 | int save_ust_channel(struct config_writer *writer, | |
1012 | struct ltt_ust_channel *ust_chan, | |
1013 | struct ltt_ust_session *session) | |
1014 | { | |
1015 | int ret; | |
1016 | ||
1017 | assert(writer); | |
1018 | assert(ust_chan); | |
1019 | assert(session); | |
1020 | ||
1021 | ret = config_writer_open_element(writer, config_element_channel); | |
1022 | if (ret) { | |
1023 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1024 | goto end; | |
1025 | } | |
1026 | ||
1027 | ret = config_writer_write_element_string(writer, config_element_name, | |
1028 | ust_chan->name); | |
1029 | if (ret) { | |
1030 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1031 | goto end; | |
1032 | } | |
1033 | ||
1034 | ret = config_writer_write_element_bool(writer, config_element_enabled, | |
1035 | ust_chan->enabled); | |
1036 | if (ret) { | |
1037 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1038 | goto end; | |
1039 | } | |
1040 | ||
1041 | ret = save_ust_channel_attributes(writer, &ust_chan->attr); | |
1042 | if (ret) { | |
1043 | goto end; | |
1044 | } | |
1045 | ||
1046 | ret = config_writer_write_element_unsigned_int(writer, | |
1047 | config_element_tracefile_size, ust_chan->tracefile_size); | |
1048 | if (ret) { | |
1049 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1050 | goto end; | |
1051 | } | |
1052 | ||
1053 | ret = config_writer_write_element_unsigned_int(writer, | |
1054 | config_element_tracefile_count, ust_chan->tracefile_count); | |
1055 | if (ret) { | |
1056 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1057 | goto end; | |
1058 | } | |
1059 | ||
1060 | ret = config_writer_write_element_unsigned_int(writer, | |
1061 | config_element_live_timer_interval, | |
1062 | session->live_timer_interval); | |
1063 | if (ret) { | |
1064 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1065 | goto end; | |
1066 | } | |
1067 | ||
1068 | ret = save_ust_events(writer, ust_chan->events); | |
1069 | if (ret) { | |
1070 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1071 | goto end; | |
1072 | } | |
1073 | ||
1074 | ret = save_ust_context(writer, &ust_chan->ctx_list); | |
1075 | if (ret) { | |
1076 | goto end; | |
1077 | } | |
1078 | ||
1079 | /* /channel */ | |
1080 | ret = config_writer_close_element(writer); | |
1081 | if (ret) { | |
1082 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1083 | goto end; | |
1084 | } | |
1085 | end: | |
1086 | return ret; | |
1087 | } | |
1088 | ||
1089 | static | |
1090 | int save_kernel_session(struct config_writer *writer, | |
1091 | struct ltt_session *session) | |
1092 | { | |
1093 | int ret; | |
1094 | struct ltt_kernel_channel *kchan; | |
1095 | ||
1096 | assert(writer); | |
1097 | assert(session); | |
1098 | ||
1099 | ret = config_writer_write_element_string(writer, config_element_type, | |
1100 | config_domain_type_kernel); | |
1101 | if (ret) { | |
1102 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1103 | goto end; | |
1104 | } | |
1105 | ||
1106 | ret = config_writer_write_element_string(writer, | |
1107 | config_element_buffer_type, config_buffer_type_global); | |
1108 | if (ret) { | |
1109 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1110 | goto end; | |
1111 | } | |
1112 | ||
1113 | ret = config_writer_open_element(writer, | |
1114 | config_element_channels); | |
1115 | if (ret) { | |
1116 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1117 | goto end; | |
1118 | } | |
1119 | ||
1120 | cds_list_for_each_entry(kchan, &session->kernel_session->channel_list.head, | |
1121 | list) { | |
1122 | ret = save_kernel_channel(writer, kchan); | |
1123 | if (ret) { | |
1124 | goto end; | |
1125 | } | |
1126 | } | |
1127 | ||
1128 | /* /channels */ | |
1129 | ret = config_writer_close_element(writer); | |
1130 | if (ret) { | |
1131 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1132 | goto end; | |
1133 | } | |
1134 | end: | |
1135 | return ret; | |
1136 | } | |
1137 | ||
1138 | static | |
1139 | int save_ust_session(struct config_writer *writer, | |
022d91ba | 1140 | struct ltt_session *session, int save_agent) |
fb198a11 JG |
1141 | { |
1142 | int ret; | |
1143 | struct ltt_ust_channel *ust_chan; | |
1144 | const char *buffer_type_string; | |
1145 | struct lttng_ht_node_str *node; | |
1146 | struct lttng_ht_iter iter; | |
1147 | ||
1148 | assert(writer); | |
1149 | assert(session); | |
1150 | ||
1151 | ret = config_writer_write_element_string(writer, config_element_type, | |
022d91ba | 1152 | save_agent ? config_domain_type_jul : config_domain_type_ust); |
fb198a11 JG |
1153 | if (ret) { |
1154 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1155 | goto end; | |
1156 | } | |
1157 | ||
1158 | buffer_type_string = get_buffer_type_string( | |
1159 | session->ust_session->buffer_type); | |
1160 | if (!buffer_type_string) { | |
1161 | ERR("Unsupported buffer type."); | |
1162 | ret = LTTNG_ERR_INVALID; | |
1163 | goto end; | |
1164 | } | |
1165 | ||
1166 | ret = config_writer_write_element_string(writer, | |
1167 | config_element_buffer_type, buffer_type_string); | |
1168 | if (ret) { | |
1169 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1170 | goto end; | |
1171 | } | |
1172 | ||
1173 | ret = config_writer_open_element(writer, config_element_channels); | |
1174 | if (ret) { | |
1175 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1176 | goto end; | |
1177 | } | |
1178 | ||
1179 | rcu_read_lock(); | |
1180 | cds_lfht_for_each_entry(session->ust_session->domain_global.channels->ht, | |
1181 | &iter.iter, node, node) { | |
022d91ba | 1182 | int agent_channel; |
fb198a11 JG |
1183 | |
1184 | ust_chan = caa_container_of(node, struct ltt_ust_channel, node); | |
da6c3a50 | 1185 | agent_channel = !strcmp(DEFAULT_JUL_CHANNEL_NAME, ust_chan->name) || |
0e115563 DG |
1186 | !strcmp(DEFAULT_LOG4J_CHANNEL_NAME, ust_chan->name) || |
1187 | !strcmp(DEFAULT_PYTHON_CHANNEL_NAME, ust_chan->name); | |
022d91ba | 1188 | if (!(save_agent ^ agent_channel)) { |
fb198a11 JG |
1189 | ret = save_ust_channel(writer, ust_chan, session->ust_session); |
1190 | if (ret) { | |
1191 | rcu_read_unlock(); | |
1192 | goto end; | |
1193 | } | |
1194 | } | |
1195 | } | |
1196 | rcu_read_unlock(); | |
1197 | ||
1198 | /* /channels */ | |
1199 | ret = config_writer_close_element(writer); | |
1200 | if (ret) { | |
1201 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1202 | goto end; | |
1203 | } | |
1204 | end: | |
1205 | return ret; | |
1206 | } | |
1207 | ||
35460079 JR |
1208 | static |
1209 | int save_pid_tracker(struct config_writer *writer, | |
1210 | struct ltt_session *sess, int domain) | |
1211 | { | |
1212 | int ret = 0; | |
1213 | ssize_t nr_pids = 0, i; | |
1214 | int32_t *pids = NULL; | |
1215 | ||
1216 | switch (domain) { | |
1217 | case LTTNG_DOMAIN_KERNEL: | |
1218 | { | |
1219 | nr_pids = kernel_list_tracker_pids(sess->kernel_session, &pids); | |
1220 | if (nr_pids < 0) { | |
1221 | ret = LTTNG_ERR_KERN_LIST_FAIL; | |
1222 | goto end; | |
1223 | } | |
1224 | break; | |
1225 | } | |
1226 | case LTTNG_DOMAIN_UST: | |
1227 | { | |
1228 | nr_pids = trace_ust_list_tracker_pids(sess->ust_session, &pids); | |
1229 | if (nr_pids < 0) { | |
1230 | ret = LTTNG_ERR_UST_LIST_FAIL; | |
1231 | goto end; | |
1232 | } | |
1233 | break; | |
1234 | } | |
1235 | case LTTNG_DOMAIN_JUL: | |
1236 | case LTTNG_DOMAIN_LOG4J: | |
1237 | case LTTNG_DOMAIN_PYTHON: | |
1238 | default: | |
1239 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; | |
1240 | goto end; | |
1241 | } | |
1242 | ||
1243 | /* Only create a pid_tracker if enabled or untrack all */ | |
1244 | if (nr_pids != 1 || (nr_pids == 1 && pids[0] != -1)) { | |
1245 | ret = config_writer_open_element(writer, | |
1246 | config_element_pid_tracker); | |
1247 | if (ret) { | |
1248 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1249 | goto end; | |
1250 | } | |
1251 | ||
1252 | ret = config_writer_open_element(writer, | |
1253 | config_element_targets); | |
1254 | if (ret) { | |
1255 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1256 | goto end; | |
1257 | } | |
1258 | ||
1259 | for (i = 0; i < nr_pids; i++) { | |
1260 | ret = config_writer_open_element(writer, | |
1261 | config_element_target_pid); | |
1262 | if (ret) { | |
1263 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1264 | goto end; | |
1265 | } | |
1266 | ||
1267 | ret = config_writer_write_element_unsigned_int(writer, | |
1268 | config_element_pid, pids[i]); | |
1269 | if (ret) { | |
1270 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1271 | goto end; | |
1272 | } | |
1273 | ||
1274 | /* /pid_target */ | |
1275 | ret = config_writer_close_element(writer); | |
1276 | if (ret) { | |
1277 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1278 | goto end; | |
1279 | } | |
1280 | } | |
1281 | ||
1282 | /* /targets */ | |
1283 | ret = config_writer_close_element(writer); | |
1284 | if (ret) { | |
1285 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1286 | goto end; | |
1287 | } | |
1288 | ||
1289 | /* /pid_tracker */ | |
1290 | ret = config_writer_close_element(writer); | |
1291 | if (ret) { | |
1292 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1293 | goto end; | |
1294 | } | |
1295 | } | |
1296 | end: | |
1297 | free(pids); | |
1298 | return ret; | |
1299 | } | |
1300 | ||
fb198a11 JG |
1301 | static |
1302 | int save_domains(struct config_writer *writer, struct ltt_session *session) | |
1303 | { | |
1304 | int ret = 0; | |
1305 | ||
1306 | assert(writer); | |
1307 | assert(session); | |
1308 | ||
1309 | if (!session->kernel_session && !session->ust_session) { | |
1310 | goto end; | |
1311 | } | |
1312 | ||
1313 | ret = config_writer_open_element(writer, config_element_domains); | |
1314 | if (ret) { | |
1315 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1316 | goto end; | |
1317 | } | |
1318 | ||
1319 | ||
1320 | if (session->kernel_session) { | |
1321 | ret = config_writer_open_element(writer, | |
1322 | config_element_domain); | |
1323 | if (ret) { | |
1324 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1325 | goto end; | |
1326 | } | |
1327 | ||
1328 | ret = save_kernel_session(writer, session); | |
1329 | if (ret) { | |
1330 | goto end; | |
1331 | } | |
1332 | ||
35460079 JR |
1333 | ret = config_writer_open_element(writer, |
1334 | config_element_trackers); | |
1335 | if (ret) { | |
1336 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1337 | goto end; | |
1338 | } | |
1339 | ||
1340 | ret = save_pid_tracker(writer, session, LTTNG_DOMAIN_KERNEL); | |
1341 | if (ret) { | |
1342 | goto end; | |
1343 | } | |
1344 | ||
1345 | /* /trackers */ | |
1346 | ret = config_writer_close_element(writer); | |
1347 | if (ret) { | |
1348 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1349 | goto end; | |
1350 | } | |
fb198a11 JG |
1351 | /* /domain */ |
1352 | ret = config_writer_close_element(writer); | |
1353 | if (ret) { | |
1354 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1355 | goto end; | |
1356 | } | |
1357 | } | |
1358 | ||
1359 | if (session->ust_session) { | |
65d72c41 JG |
1360 | unsigned long agent_count; |
1361 | ||
fb198a11 JG |
1362 | ret = config_writer_open_element(writer, |
1363 | config_element_domain); | |
1364 | if (ret) { | |
1365 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1366 | goto end; | |
1367 | } | |
1368 | ||
1369 | ret = save_ust_session(writer, session, 0); | |
1370 | if (ret) { | |
1371 | goto end; | |
1372 | } | |
1373 | ||
35460079 JR |
1374 | ret = config_writer_open_element(writer, |
1375 | config_element_trackers); | |
1376 | if (ret) { | |
1377 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1378 | goto end; | |
1379 | } | |
1380 | ||
1381 | ret = save_pid_tracker(writer, session, LTTNG_DOMAIN_UST); | |
1382 | if (ret) { | |
1383 | goto end; | |
1384 | } | |
1385 | ||
1386 | /* /trackers */ | |
1387 | ret = config_writer_close_element(writer); | |
1388 | if (ret) { | |
1389 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1390 | goto end; | |
1391 | } | |
fb198a11 JG |
1392 | /* /domain */ |
1393 | ret = config_writer_close_element(writer); | |
1394 | if (ret) { | |
1395 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1396 | goto end; | |
1397 | } | |
fb198a11 | 1398 | |
65d72c41 JG |
1399 | rcu_read_lock(); |
1400 | agent_count = | |
1401 | lttng_ht_get_count(session->ust_session->agents); | |
1402 | rcu_read_unlock(); | |
fb198a11 | 1403 | |
65d72c41 JG |
1404 | if (agent_count > 0) { |
1405 | ret = config_writer_open_element(writer, | |
1406 | config_element_domain); | |
1407 | if (ret) { | |
1408 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1409 | goto end; | |
1410 | } | |
fb198a11 | 1411 | |
65d72c41 JG |
1412 | ret = save_ust_session(writer, session, 1); |
1413 | if (ret) { | |
1414 | goto end; | |
1415 | } | |
1416 | ||
1417 | /* /domain */ | |
1418 | ret = config_writer_close_element(writer); | |
1419 | if (ret) { | |
1420 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1421 | goto end; | |
1422 | } | |
fb198a11 JG |
1423 | } |
1424 | } | |
1425 | ||
65d72c41 JG |
1426 | if (session->ust_session) { |
1427 | } | |
1428 | ||
fb198a11 JG |
1429 | /* /domains */ |
1430 | ret = config_writer_close_element(writer); | |
1431 | if (ret) { | |
1432 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1433 | goto end; | |
1434 | } | |
1435 | end: | |
1436 | return ret; | |
1437 | } | |
1438 | ||
1439 | static | |
1440 | int save_consumer_output(struct config_writer *writer, | |
1441 | struct consumer_output *output) | |
1442 | { | |
1443 | int ret; | |
1444 | ||
1445 | assert(writer); | |
1446 | assert(output); | |
1447 | ||
1448 | ret = config_writer_open_element(writer, config_element_consumer_output); | |
1449 | if (ret) { | |
1450 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1451 | goto end; | |
1452 | } | |
1453 | ||
1454 | ret = config_writer_write_element_bool(writer, config_element_enabled, | |
1455 | output->enabled); | |
1456 | if (ret) { | |
1457 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1458 | goto end; | |
1459 | } | |
1460 | ||
1461 | ret = config_writer_open_element(writer, config_element_destination); | |
1462 | if (ret) { | |
1463 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1464 | goto end; | |
1465 | } | |
1466 | ||
1467 | switch (output->type) { | |
1468 | case CONSUMER_DST_LOCAL: | |
1469 | ret = config_writer_write_element_string(writer, | |
1470 | config_element_path, output->dst.trace_path); | |
1471 | if (ret) { | |
1472 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1473 | goto end; | |
1474 | } | |
1475 | break; | |
1476 | case CONSUMER_DST_NET: | |
1477 | { | |
1478 | char *uri; | |
1479 | ||
1480 | uri = zmalloc(PATH_MAX); | |
1481 | if (!uri) { | |
1482 | ret = LTTNG_ERR_NOMEM; | |
1483 | goto end; | |
1484 | } | |
1485 | ||
1486 | ret = config_writer_open_element(writer, config_element_net_output); | |
1487 | if (ret) { | |
1488 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1489 | goto end_net_output; | |
1490 | } | |
1491 | ||
1492 | if (output->dst.net.control_isset && | |
1493 | output->dst.net.data_isset) { | |
1494 | ret = uri_to_str_url(&output->dst.net.control, uri, PATH_MAX); | |
1495 | if (ret < 0) { | |
1496 | ret = LTTNG_ERR_INVALID; | |
1497 | goto end_net_output; | |
1498 | } | |
1499 | ||
1500 | ret = config_writer_write_element_string(writer, | |
1501 | config_element_control_uri, uri); | |
1502 | if (ret) { | |
1503 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1504 | goto end_net_output; | |
1505 | } | |
1506 | ||
1507 | ret = uri_to_str_url(&output->dst.net.data, uri, PATH_MAX); | |
1508 | if (ret < 0) { | |
1509 | ret = LTTNG_ERR_INVALID; | |
1510 | goto end_net_output; | |
1511 | } | |
1512 | ||
1513 | ret = config_writer_write_element_string(writer, | |
1514 | config_element_data_uri, uri); | |
1515 | if (ret) { | |
1516 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1517 | goto end_net_output; | |
1518 | } | |
1519 | ||
1520 | end_net_output: | |
1521 | free(uri); | |
1522 | if (ret) { | |
1523 | goto end; | |
1524 | } | |
1525 | } else { | |
1526 | ret = !output->dst.net.control_isset ? | |
1527 | LTTNG_ERR_URL_CTRL_MISS : | |
1528 | LTTNG_ERR_URL_DATA_MISS; | |
c39270e5 | 1529 | free(uri); |
fb198a11 JG |
1530 | goto end; |
1531 | } | |
1532 | ||
1533 | ret = config_writer_close_element(writer); | |
1534 | if (ret) { | |
1535 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1536 | goto end; | |
1537 | } | |
1538 | break; | |
1539 | } | |
1540 | default: | |
1541 | ERR("Unsupported consumer output type."); | |
1542 | ret = LTTNG_ERR_INVALID; | |
1543 | goto end; | |
1544 | } | |
1545 | ||
1546 | /* /destination */ | |
1547 | ret = config_writer_close_element(writer); | |
1548 | if (ret) { | |
1549 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1550 | goto end; | |
1551 | } | |
1552 | ||
1553 | /* /consumer_output */ | |
1554 | ret = config_writer_close_element(writer); | |
1555 | if (ret) { | |
1556 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1557 | goto end; | |
1558 | } | |
1559 | end: | |
1560 | return ret; | |
1561 | } | |
1562 | ||
1563 | static | |
1564 | int save_snapshot_outputs(struct config_writer *writer, | |
1565 | struct snapshot *snapshot) | |
1566 | { | |
1567 | int ret; | |
1568 | struct lttng_ht_iter iter; | |
1569 | struct snapshot_output *output; | |
1570 | ||
1571 | assert(writer); | |
1572 | assert(snapshot); | |
1573 | ||
1574 | ret = config_writer_open_element(writer, config_element_snapshot_outputs); | |
1575 | if (ret) { | |
1576 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1577 | goto end; | |
1578 | } | |
1579 | ||
1580 | rcu_read_lock(); | |
1581 | cds_lfht_for_each_entry(snapshot->output_ht->ht, &iter.iter, output, | |
1582 | node.node) { | |
1583 | ret = config_writer_open_element(writer, | |
1584 | config_element_output); | |
1585 | if (ret) { | |
1586 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1587 | goto end_unlock; | |
1588 | } | |
1589 | ||
1590 | ret = config_writer_write_element_string(writer, | |
1591 | config_element_name, output->name); | |
1592 | if (ret) { | |
1593 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1594 | goto end_unlock; | |
1595 | } | |
1596 | ||
1597 | ret = config_writer_write_element_unsigned_int(writer, | |
1598 | config_element_max_size, output->max_size); | |
1599 | if (ret) { | |
1600 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1601 | goto end_unlock; | |
1602 | } | |
1603 | ||
1604 | ret = save_consumer_output(writer, output->consumer); | |
1605 | if (ret) { | |
1606 | goto end_unlock; | |
1607 | } | |
1608 | ||
1609 | /* /output */ | |
1610 | ret = config_writer_close_element(writer); | |
1611 | if (ret) { | |
1612 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1613 | goto end_unlock; | |
1614 | } | |
1615 | } | |
1616 | rcu_read_unlock(); | |
1617 | ||
1618 | /* /snapshot_outputs */ | |
1619 | ret = config_writer_close_element(writer); | |
1620 | if (ret) { | |
1621 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1622 | goto end; | |
1623 | } | |
1624 | ||
1625 | end: | |
1626 | return ret; | |
1627 | end_unlock: | |
1628 | rcu_read_unlock(); | |
1629 | return ret; | |
1630 | } | |
1631 | ||
1632 | static | |
1633 | int save_session_output(struct config_writer *writer, | |
1634 | struct ltt_session *session) | |
1635 | { | |
1636 | int ret; | |
1637 | ||
1638 | assert(writer); | |
1639 | assert(session); | |
1640 | ||
1641 | if ((session->snapshot_mode && session->snapshot.nb_output == 0) || | |
1642 | (!session->snapshot_mode && !session->consumer)) { | |
1643 | /* Session is in no output mode */ | |
1644 | ret = 0; | |
1645 | goto end; | |
1646 | } | |
1647 | ||
1648 | ret = config_writer_open_element(writer, config_element_output); | |
1649 | if (ret) { | |
1650 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1651 | goto end; | |
1652 | } | |
1653 | ||
1654 | if (session->snapshot_mode) { | |
1655 | ret = save_snapshot_outputs(writer, &session->snapshot); | |
1656 | if (ret) { | |
1657 | goto end; | |
1658 | } | |
1659 | } else { | |
1660 | if (session->consumer) { | |
1661 | ret = save_consumer_output(writer, session->consumer); | |
1662 | if (ret) { | |
1663 | goto end; | |
1664 | } | |
1665 | } | |
1666 | } | |
1667 | ||
1668 | /* /output */ | |
1669 | ret = config_writer_close_element(writer); | |
1670 | if (ret) { | |
1671 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1672 | goto end; | |
1673 | } | |
1674 | end: | |
1675 | return ret; | |
1676 | } | |
1677 | ||
1678 | /* | |
1679 | * Save the given session. | |
1680 | * | |
1681 | * Return 0 on success else a LTTNG_ERR* code. | |
1682 | */ | |
1683 | static | |
1684 | int save_session(struct ltt_session *session, | |
1685 | struct lttng_save_session_attr *attr, lttng_sock_cred *creds) | |
1686 | { | |
1687 | int ret, fd; | |
db471218 | 1688 | unsigned int file_opened = 0; /* Indicate if the file has been opened */ |
fb198a11 JG |
1689 | char config_file_path[PATH_MAX]; |
1690 | size_t len; | |
1691 | struct config_writer *writer = NULL; | |
1692 | size_t session_name_len; | |
1693 | const char *provided_path; | |
1694 | ||
1695 | assert(session); | |
1696 | assert(attr); | |
1697 | assert(creds); | |
1698 | ||
1699 | session_name_len = strlen(session->name); | |
95a29ab8 | 1700 | memset(config_file_path, 0, sizeof(config_file_path)); |
fb198a11 JG |
1701 | |
1702 | if (!session_access_ok(session, | |
1703 | LTTNG_SOCK_GET_UID_CRED(creds), | |
1704 | LTTNG_SOCK_GET_GID_CRED(creds))) { | |
1705 | ret = LTTNG_ERR_EPERM; | |
1706 | goto end; | |
1707 | } | |
1708 | ||
1709 | provided_path = lttng_save_session_attr_get_output_url(attr); | |
1710 | if (provided_path) { | |
95a29ab8 | 1711 | DBG3("Save session in provided path %s", provided_path); |
fb198a11 | 1712 | len = strlen(provided_path); |
d2992717 | 1713 | if (len >= sizeof(config_file_path)) { |
fb198a11 JG |
1714 | ret = LTTNG_ERR_SET_URL; |
1715 | goto end; | |
1716 | } | |
1717 | strncpy(config_file_path, provided_path, len); | |
1718 | } else { | |
7e078ad1 | 1719 | ssize_t ret_len; |
fb198a11 JG |
1720 | char *home_dir = utils_get_user_home_dir( |
1721 | LTTNG_SOCK_GET_UID_CRED(creds)); | |
1722 | if (!home_dir) { | |
1723 | ret = LTTNG_ERR_SET_URL; | |
1724 | goto end; | |
1725 | } | |
1726 | ||
d2992717 | 1727 | ret_len = snprintf(config_file_path, sizeof(config_file_path), |
fb198a11 JG |
1728 | DEFAULT_SESSION_HOME_CONFIGPATH, home_dir); |
1729 | free(home_dir); | |
7e078ad1 | 1730 | if (ret_len < 0) { |
fb198a11 JG |
1731 | PERROR("snprintf save session"); |
1732 | ret = LTTNG_ERR_SET_URL; | |
1733 | goto end; | |
1734 | } | |
7e078ad1 | 1735 | len = ret_len; |
fb198a11 JG |
1736 | } |
1737 | ||
1738 | /* | |
d2992717 DG |
1739 | * Check the path fits in the config file path dst including the '/' |
1740 | * followed by trailing .lttng extension and the NULL terminated string. | |
fb198a11 | 1741 | */ |
d2992717 DG |
1742 | if ((len + session_name_len + 2 + |
1743 | sizeof(DEFAULT_SESSION_CONFIG_FILE_EXTENSION)) | |
1744 | > sizeof(config_file_path)) { | |
fb198a11 JG |
1745 | ret = LTTNG_ERR_SET_URL; |
1746 | goto end; | |
1747 | } | |
1748 | ||
1749 | ret = run_as_mkdir_recursive(config_file_path, S_IRWXU | S_IRWXG, | |
1750 | LTTNG_SOCK_GET_UID_CRED(creds), LTTNG_SOCK_GET_GID_CRED(creds)); | |
1751 | if (ret) { | |
1752 | ret = LTTNG_ERR_SET_URL; | |
1753 | goto end; | |
1754 | } | |
1755 | ||
d2992717 DG |
1756 | /* |
1757 | * At this point, we know that everything fits in the buffer. Validation | |
1758 | * was done just above. | |
1759 | */ | |
fb198a11 JG |
1760 | config_file_path[len++] = '/'; |
1761 | strncpy(config_file_path + len, session->name, session_name_len); | |
1762 | len += session_name_len; | |
1763 | strcpy(config_file_path + len, DEFAULT_SESSION_CONFIG_FILE_EXTENSION); | |
95a29ab8 DG |
1764 | len += sizeof(DEFAULT_SESSION_CONFIG_FILE_EXTENSION); |
1765 | config_file_path[len] = '\0'; | |
fb198a11 JG |
1766 | |
1767 | if (!access(config_file_path, F_OK) && !attr->overwrite) { | |
f9b57ab2 DG |
1768 | /* File exists, notify the user since the overwrite flag is off. */ |
1769 | ret = LTTNG_ERR_SAVE_FILE_EXIST; | |
fb198a11 JG |
1770 | goto end; |
1771 | } | |
1772 | ||
1773 | fd = run_as_open(config_file_path, O_CREAT | O_WRONLY | O_TRUNC, | |
1774 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP, | |
1775 | LTTNG_SOCK_GET_UID_CRED(creds), LTTNG_SOCK_GET_GID_CRED(creds)); | |
1776 | if (fd < 0) { | |
1777 | PERROR("Could not create configuration file"); | |
1778 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1779 | goto end; | |
1780 | } | |
db471218 | 1781 | file_opened = 1; |
fb198a11 | 1782 | |
705bb62f | 1783 | writer = config_writer_create(fd, 1); |
fb198a11 JG |
1784 | if (!writer) { |
1785 | ret = LTTNG_ERR_NOMEM; | |
1786 | goto end; | |
1787 | } | |
1788 | ||
1789 | ret = config_writer_open_element(writer, config_element_sessions); | |
1790 | if (ret) { | |
1791 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1792 | goto end; | |
1793 | } | |
1794 | ||
1795 | ret = config_writer_open_element(writer, config_element_session); | |
1796 | if (ret) { | |
1797 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1798 | goto end; | |
1799 | } | |
1800 | ||
1801 | ret = config_writer_write_element_string(writer, config_element_name, | |
1802 | session->name); | |
1803 | if (ret) { | |
1804 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1805 | goto end; | |
1806 | } | |
1807 | ||
9e7c9f56 JR |
1808 | if(session->shm_path[0] != '\0') { |
1809 | ret = config_writer_write_element_string(writer, | |
1810 | config_element_shared_memory_path, | |
1811 | session->shm_path); | |
1812 | if (ret) { | |
1813 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1814 | goto end; | |
1815 | } | |
1816 | } | |
1817 | ||
fb198a11 JG |
1818 | ret = save_domains(writer, session); |
1819 | if (ret) { | |
1820 | goto end; | |
1821 | } | |
1822 | ||
1823 | ret = config_writer_write_element_bool(writer, config_element_started, | |
8382cf6f | 1824 | session->active); |
fb198a11 JG |
1825 | if (ret) { |
1826 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1827 | goto end; | |
1828 | } | |
1829 | ||
1830 | if (session->snapshot_mode || session->live_timer) { | |
1831 | ret = config_writer_open_element(writer, config_element_attributes); | |
1832 | if (ret) { | |
1833 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1834 | goto end; | |
1835 | } | |
1836 | ||
1837 | if (session->snapshot_mode) { | |
1838 | ret = config_writer_write_element_bool(writer, | |
1839 | config_element_snapshot_mode, 1); | |
1840 | if (ret) { | |
1841 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1842 | goto end; | |
1843 | } | |
1844 | } else { | |
d98ad589 | 1845 | ret = config_writer_write_element_unsigned_int(writer, |
fb198a11 JG |
1846 | config_element_live_timer_interval, session->live_timer); |
1847 | if (ret) { | |
1848 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1849 | goto end; | |
1850 | } | |
1851 | } | |
1852 | ||
1853 | /* /attributes */ | |
1854 | ret = config_writer_close_element(writer); | |
1855 | if (ret) { | |
1856 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1857 | goto end; | |
1858 | } | |
1859 | } | |
1860 | ||
1861 | ret = save_session_output(writer, session); | |
1862 | if (ret) { | |
1863 | goto end; | |
1864 | } | |
1865 | ||
1866 | /* /session */ | |
1867 | ret = config_writer_close_element(writer); | |
1868 | if (ret) { | |
1869 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1870 | goto end; | |
1871 | } | |
1872 | ||
1873 | /* /sessions */ | |
1874 | ret = config_writer_close_element(writer); | |
1875 | if (ret) { | |
1876 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1877 | goto end; | |
1878 | } | |
1879 | end: | |
1880 | if (writer && config_writer_destroy(writer)) { | |
1881 | /* Preserve the original error code */ | |
1882 | ret = ret ? ret : LTTNG_ERR_SAVE_IO_FAIL; | |
1883 | } | |
1884 | if (ret) { | |
1885 | /* Delete file in case of error */ | |
db471218 | 1886 | if (file_opened && unlink(config_file_path)) { |
fb198a11 JG |
1887 | PERROR("Unlinking XML session configuration."); |
1888 | } | |
1889 | } | |
1890 | ||
1891 | return ret; | |
1892 | } | |
1893 | ||
1894 | int cmd_save_sessions(struct lttng_save_session_attr *attr, | |
1895 | lttng_sock_cred *creds) | |
1896 | { | |
1897 | int ret; | |
1898 | const char *session_name; | |
1899 | struct ltt_session *session; | |
1900 | ||
1901 | session_lock_list(); | |
1902 | ||
1903 | session_name = lttng_save_session_attr_get_session_name(attr); | |
1904 | if (session_name) { | |
1905 | session = session_find_by_name(session_name); | |
1906 | if (!session) { | |
1907 | ret = LTTNG_ERR_SESS_NOT_FOUND; | |
1908 | goto end; | |
1909 | } | |
1910 | ||
1911 | session_lock(session); | |
1912 | ret = save_session(session, attr, creds); | |
1913 | session_unlock(session); | |
1914 | if (ret) { | |
1915 | goto end; | |
1916 | } | |
1917 | } else { | |
1918 | struct ltt_session_list *list = session_get_list(); | |
1919 | ||
1920 | cds_list_for_each_entry(session, &list->head, list) { | |
1921 | session_lock(session); | |
1922 | ret = save_session(session, attr, creds); | |
1923 | session_unlock(session); | |
1924 | ||
1925 | /* Don't abort if we don't have the required permissions. */ | |
1926 | if (ret && ret != LTTNG_ERR_EPERM) { | |
1927 | goto end; | |
1928 | } | |
1929 | } | |
1930 | } | |
1931 | ret = LTTNG_OK; | |
1932 | ||
1933 | end: | |
1934 | session_unlock_list(); | |
1935 | return ret; | |
1936 | } |