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 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 | ||
366 | if (event->event->instrumentation == LTTNG_KERNEL_FUNCTION || | |
367 | event->event->instrumentation == LTTNG_KERNEL_KPROBE || | |
368 | event->event->instrumentation == LTTNG_KERNEL_KRETPROBE) { | |
369 | ||
370 | ret = config_writer_open_element(writer, | |
371 | config_element_attributes); | |
372 | if (ret) { | |
373 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
374 | goto end; | |
375 | } | |
376 | ||
377 | switch (event->event->instrumentation) { | |
0de3eda1 | 378 | case LTTNG_KERNEL_SYSCALL: |
fb198a11 JG |
379 | case LTTNG_KERNEL_FUNCTION: |
380 | ret = config_writer_open_element(writer, | |
381 | config_element_function_attributes); | |
382 | if (ret) { | |
383 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
384 | goto end; | |
385 | } | |
386 | ||
387 | ret = config_writer_write_element_string(writer, | |
388 | config_element_name, | |
389 | event->event->u.ftrace.symbol_name); | |
390 | if (ret) { | |
391 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
392 | goto end; | |
393 | } | |
394 | ||
395 | /* /function attributes */ | |
396 | ret = config_writer_close_element(writer); | |
397 | if (ret) { | |
398 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
399 | goto end; | |
400 | } | |
401 | break; | |
402 | case LTTNG_KERNEL_KPROBE: | |
403 | case LTTNG_KERNEL_KRETPROBE: | |
404 | { | |
405 | const char *symbol_name; | |
406 | uint64_t addr; | |
407 | uint64_t offset; | |
408 | ||
409 | if (event->event->instrumentation == | |
410 | LTTNG_KERNEL_KPROBE) { | |
411 | /* | |
412 | * Comments in lttng-kernel.h mention that | |
413 | * either addr or symbol_name are set, not both. | |
414 | */ | |
415 | addr = event->event->u.kprobe.addr; | |
416 | offset = event->event->u.kprobe.offset; | |
417 | symbol_name = addr ? NULL : | |
418 | event->event->u.kprobe.symbol_name; | |
419 | } else { | |
420 | symbol_name = | |
421 | event->event->u.kretprobe.symbol_name; | |
422 | addr = event->event->u.kretprobe.addr; | |
423 | offset = event->event->u.kretprobe.offset; | |
424 | } | |
425 | ||
426 | ret = config_writer_open_element(writer, | |
427 | config_element_probe_attributes); | |
428 | if (ret) { | |
429 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
430 | goto end; | |
431 | } | |
432 | ||
433 | if (symbol_name) { | |
434 | ret = config_writer_write_element_string(writer, | |
435 | config_element_symbol_name, | |
436 | symbol_name); | |
437 | if (ret) { | |
438 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
439 | goto end; | |
440 | } | |
441 | } | |
442 | ||
443 | if (addr) { | |
444 | ret = config_writer_write_element_unsigned_int( | |
445 | writer, config_element_address, addr); | |
446 | if (ret) { | |
447 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
448 | goto end; | |
449 | } | |
450 | } | |
451 | ||
452 | if (offset) { | |
453 | ret = config_writer_write_element_unsigned_int( | |
454 | writer, config_element_offset, offset); | |
455 | if (ret) { | |
456 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
457 | goto end; | |
458 | } | |
459 | } | |
460 | ||
461 | ret = config_writer_close_element(writer); | |
462 | if (ret) { | |
463 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
464 | goto end; | |
465 | } | |
466 | break; | |
467 | } | |
468 | default: | |
469 | ERR("Unsupported kernel instrumentation type."); | |
470 | ret = LTTNG_ERR_INVALID; | |
471 | goto end; | |
472 | } | |
473 | ||
474 | /* /attributes */ | |
475 | ret = config_writer_close_element(writer); | |
476 | if (ret) { | |
477 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
478 | goto end; | |
479 | } | |
480 | } | |
481 | ||
482 | /* /event */ | |
483 | ret = config_writer_close_element(writer); | |
484 | if (ret) { | |
485 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
486 | goto end; | |
487 | } | |
488 | end: | |
489 | return ret; | |
490 | } | |
491 | ||
0de3eda1 DG |
492 | static |
493 | int save_kernel_syscall(struct config_writer *writer, | |
494 | struct ltt_kernel_channel *kchan) | |
495 | { | |
496 | int ret, i; | |
497 | ssize_t count; | |
498 | struct lttng_event *events = NULL; | |
499 | ||
500 | assert(writer); | |
501 | assert(kchan); | |
502 | ||
503 | count = syscall_list_channel(kchan, &events, 0); | |
504 | if (!count) { | |
505 | /* No syscalls, just gracefully return. */ | |
506 | ret = 0; | |
507 | goto end; | |
508 | } | |
509 | ||
510 | for (i = 0; i < count; i++) { | |
511 | struct ltt_kernel_event *kevent; | |
512 | ||
513 | /* Create a temporary kevent in order to save it. */ | |
00a62084 MD |
514 | /* |
515 | * TODO: struct lttng_event does not really work for a filter, | |
516 | * but unfortunately, it is exposed as external API (and used as | |
517 | * internal representation. Using NULL meanwhile. | |
518 | */ | |
519 | kevent = trace_kernel_create_event(&events[i], | |
520 | NULL, NULL); | |
0de3eda1 DG |
521 | if (!kevent) { |
522 | ret = -ENOMEM; | |
523 | goto end; | |
524 | } | |
525 | /* Init list in order so the destroy call can del the node. */ | |
526 | CDS_INIT_LIST_HEAD(&kevent->list); | |
527 | ||
528 | ret = save_kernel_event(writer, kevent); | |
529 | trace_kernel_destroy_event(kevent); | |
530 | if (ret) { | |
531 | goto end; | |
532 | } | |
533 | } | |
534 | ||
535 | /* Everything went well */ | |
536 | ret = 0; | |
537 | ||
538 | end: | |
539 | free(events); | |
540 | return ret; | |
541 | } | |
542 | ||
fb198a11 JG |
543 | static |
544 | int save_kernel_events(struct config_writer *writer, | |
0de3eda1 | 545 | struct ltt_kernel_channel *kchan) |
fb198a11 JG |
546 | { |
547 | int ret; | |
548 | struct ltt_kernel_event *event; | |
549 | ||
550 | ret = config_writer_open_element(writer, config_element_events); | |
551 | if (ret) { | |
552 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
553 | goto end; | |
554 | } | |
555 | ||
0de3eda1 | 556 | cds_list_for_each_entry(event, &kchan->events_list.head, list) { |
fb198a11 JG |
557 | ret = save_kernel_event(writer, event); |
558 | if (ret) { | |
559 | goto end; | |
560 | } | |
561 | } | |
562 | ||
0de3eda1 DG |
563 | /* Save syscalls if any. */ |
564 | ret = save_kernel_syscall(writer, kchan); | |
565 | if (ret) { | |
566 | goto end; | |
567 | } | |
568 | ||
fb198a11 JG |
569 | /* /events */ |
570 | ret = config_writer_close_element(writer); | |
571 | if (ret) { | |
572 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
573 | goto end; | |
574 | } | |
575 | end: | |
576 | return ret; | |
577 | } | |
578 | ||
579 | static | |
580 | int save_ust_event(struct config_writer *writer, | |
581 | struct ltt_ust_event *event) | |
582 | { | |
583 | int ret; | |
584 | const char *loglevel_type_string; | |
585 | ||
586 | ret = config_writer_open_element(writer, config_element_event); | |
587 | if (ret) { | |
588 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
589 | goto end; | |
590 | } | |
591 | ||
592 | if (event->attr.name[0]) { | |
593 | ret = config_writer_write_element_string(writer, | |
594 | config_element_name, event->attr.name); | |
595 | if (ret) { | |
596 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
597 | goto end; | |
598 | } | |
599 | } | |
600 | ||
601 | ret = config_writer_write_element_bool(writer, config_element_enabled, | |
602 | event->enabled); | |
603 | if (ret) { | |
604 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
605 | goto end; | |
606 | } | |
607 | ||
608 | if (event->attr.instrumentation != LTTNG_UST_TRACEPOINT) { | |
609 | ERR("Unsupported UST instrumentation type."); | |
610 | ret = LTTNG_ERR_INVALID; | |
611 | goto end; | |
612 | } | |
613 | ret = config_writer_write_element_string(writer, config_element_type, | |
614 | config_event_type_tracepoint); | |
615 | if (ret) { | |
616 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
617 | goto end; | |
618 | } | |
619 | ||
620 | loglevel_type_string = get_loglevel_type_string( | |
621 | event->attr.loglevel_type); | |
622 | if (!loglevel_type_string) { | |
623 | ERR("Unsupported UST loglevel type."); | |
624 | ret = LTTNG_ERR_INVALID; | |
625 | goto end; | |
626 | } | |
627 | ||
628 | ret = config_writer_write_element_string(writer, | |
629 | config_element_loglevel_type, loglevel_type_string); | |
630 | if (ret) { | |
631 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
632 | goto end; | |
633 | } | |
634 | ||
635 | ret = config_writer_write_element_signed_int(writer, | |
636 | config_element_loglevel, event->attr.loglevel); | |
637 | if (ret) { | |
638 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
639 | goto end; | |
640 | } | |
641 | ||
642 | if (event->filter_expression) { | |
643 | ret = config_writer_write_element_string(writer, | |
644 | config_element_filter, event->filter_expression); | |
645 | if (ret) { | |
646 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
647 | goto end; | |
648 | } | |
649 | } | |
650 | ||
651 | if (event->exclusion && event->exclusion->count) { | |
652 | uint32_t i; | |
653 | ||
654 | ret = config_writer_open_element(writer, | |
655 | config_element_exclusions); | |
656 | if (ret) { | |
657 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
658 | goto end; | |
659 | } | |
660 | ||
661 | for (i = 0; i < event->exclusion->count; i++) { | |
662 | ret = config_writer_write_element_string(writer, | |
663 | config_element_exclusion, | |
664 | &event->exclusion->names[0][i]); | |
665 | if (ret) { | |
666 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
667 | goto end; | |
668 | } | |
669 | } | |
670 | ||
671 | /* /exclusions */ | |
672 | ret = config_writer_close_element(writer); | |
673 | if (ret) { | |
674 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
675 | goto end; | |
676 | } | |
677 | } | |
678 | ||
679 | /* /event */ | |
680 | ret = config_writer_close_element(writer); | |
681 | if (ret) { | |
682 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
683 | goto end; | |
684 | } | |
685 | end: | |
686 | return ret; | |
687 | } | |
688 | ||
689 | static | |
690 | int save_ust_events(struct config_writer *writer, | |
691 | struct lttng_ht *events) | |
692 | { | |
693 | int ret; | |
694 | struct ltt_ust_event *event; | |
695 | struct lttng_ht_node_str *node; | |
696 | struct lttng_ht_iter iter; | |
697 | ||
698 | ret = config_writer_open_element(writer, config_element_events); | |
699 | if (ret) { | |
700 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
701 | goto end; | |
702 | } | |
703 | ||
704 | rcu_read_lock(); | |
705 | cds_lfht_for_each_entry(events->ht, &iter.iter, node, node) { | |
706 | event = caa_container_of(node, struct ltt_ust_event, node); | |
707 | ||
af325ba1 JG |
708 | if (event->internal) { |
709 | /* Internal events must not be exposed to clients */ | |
710 | continue; | |
711 | } | |
fb198a11 JG |
712 | ret = save_ust_event(writer, event); |
713 | if (ret) { | |
714 | rcu_read_unlock(); | |
715 | goto end; | |
716 | } | |
717 | } | |
718 | rcu_read_unlock(); | |
719 | ||
720 | /* /events */ | |
721 | ret = config_writer_close_element(writer); | |
722 | if (ret) { | |
723 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
724 | goto end; | |
725 | } | |
726 | end: | |
727 | return ret; | |
728 | } | |
729 | ||
730 | static | |
731 | int save_kernel_context(struct config_writer *writer, | |
732 | struct lttng_kernel_context *ctx) | |
733 | { | |
734 | int ret = 0; | |
735 | ||
736 | if (!ctx) { | |
737 | goto end; | |
738 | } | |
739 | ||
fb198a11 JG |
740 | ret = config_writer_open_element(writer, config_element_context); |
741 | if (ret) { | |
742 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
743 | goto end; | |
744 | } | |
745 | ||
cba45eda | 746 | if (ctx->ctx == LTTNG_KERNEL_CONTEXT_PERF_CPU_COUNTER) { |
fb198a11 JG |
747 | ret = config_writer_open_element(writer, config_element_perf); |
748 | if (ret) { | |
749 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
750 | goto end; | |
751 | } | |
752 | ||
753 | ret = config_writer_write_element_unsigned_int(writer, | |
754 | config_element_type, ctx->u.perf_counter.type); | |
755 | if (ret) { | |
756 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
757 | goto end; | |
758 | } | |
759 | ||
760 | ret = config_writer_write_element_unsigned_int(writer, | |
761 | config_element_config, ctx->u.perf_counter.config); | |
762 | if (ret) { | |
763 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
764 | goto end; | |
765 | } | |
766 | ||
767 | ret = config_writer_write_element_string(writer, | |
768 | config_element_name, ctx->u.perf_counter.name); | |
769 | if (ret) { | |
770 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
771 | goto end; | |
772 | } | |
773 | ||
774 | /* /perf */ | |
775 | ret = config_writer_close_element(writer); | |
776 | if (ret) { | |
777 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
778 | goto end; | |
779 | } | |
780 | } else { | |
781 | const char *context_type_string = | |
782 | get_kernel_context_type_string(ctx->ctx); | |
783 | ||
784 | if (!context_type_string) { | |
785 | ERR("Unsupported kernel context type."); | |
786 | ret = LTTNG_ERR_INVALID; | |
787 | goto end; | |
788 | } | |
789 | ||
790 | ret = config_writer_write_element_string(writer, | |
791 | config_element_type, context_type_string); | |
792 | if (ret) { | |
793 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
794 | goto end; | |
795 | } | |
796 | } | |
797 | ||
798 | /* /context */ | |
799 | ret = config_writer_close_element(writer); | |
800 | if (ret) { | |
801 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
802 | goto end; | |
803 | } | |
804 | ||
645328ae DG |
805 | end: |
806 | return ret; | |
807 | } | |
808 | ||
809 | static | |
810 | int save_kernel_contexts(struct config_writer *writer, | |
811 | struct ltt_kernel_channel *kchan) | |
812 | { | |
813 | int ret; | |
814 | struct ltt_kernel_context *ctx; | |
815 | ||
2aa64052 JG |
816 | if (cds_list_empty(&kchan->ctx_list)) { |
817 | ret = 0; | |
818 | goto end; | |
819 | } | |
820 | ||
645328ae DG |
821 | ret = config_writer_open_element(writer, config_element_contexts); |
822 | if (ret) { | |
823 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
824 | goto end; | |
825 | } | |
826 | ||
827 | cds_list_for_each_entry(ctx, &kchan->ctx_list, list) { | |
828 | ret = save_kernel_context(writer, &ctx->ctx); | |
829 | if (ret) { | |
830 | goto end; | |
831 | } | |
832 | } | |
833 | ||
fb198a11 JG |
834 | /* /contexts */ |
835 | ret = config_writer_close_element(writer); | |
836 | if (ret) { | |
837 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
838 | goto end; | |
839 | } | |
840 | end: | |
841 | return ret; | |
842 | } | |
843 | ||
844 | static | |
845 | int save_ust_context(struct config_writer *writer, | |
846 | struct cds_list_head *ctx_list) | |
847 | { | |
848 | int ret; | |
849 | struct ltt_ust_context *ctx; | |
850 | ||
851 | assert(writer); | |
852 | assert(ctx_list); | |
853 | ||
854 | ret = config_writer_open_element(writer, config_element_contexts); | |
855 | if (ret) { | |
856 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
857 | goto end; | |
858 | } | |
859 | ||
860 | cds_list_for_each_entry(ctx, ctx_list, list) { | |
861 | const char *context_type_string; | |
862 | ||
fb198a11 JG |
863 | |
864 | ret = config_writer_open_element(writer, | |
865 | config_element_context); | |
866 | if (ret) { | |
867 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
868 | goto end; | |
869 | } | |
870 | ||
14ce5bd8 JG |
871 | if (ctx->ctx.ctx == LTTNG_UST_CONTEXT_PERF_THREAD_COUNTER) { |
872 | /* Perf contexts are saved as event_perf_context_type */ | |
873 | ret = config_writer_open_element(writer, | |
874 | config_element_perf); | |
875 | if (ret) { | |
876 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
877 | goto end; | |
878 | } | |
879 | ||
880 | ret = config_writer_write_element_unsigned_int(writer, | |
881 | config_element_type, | |
882 | ctx->ctx.u.perf_counter.type); | |
883 | if (ret) { | |
884 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
885 | goto end; | |
886 | } | |
887 | ||
888 | ret = config_writer_write_element_unsigned_int(writer, | |
889 | config_element_config, | |
890 | ctx->ctx.u.perf_counter.config); | |
891 | if (ret) { | |
892 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
893 | goto end; | |
894 | } | |
895 | ||
896 | ret = config_writer_write_element_string(writer, | |
897 | config_element_name, | |
898 | ctx->ctx.u.perf_counter.name); | |
899 | if (ret) { | |
900 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
901 | goto end; | |
902 | } | |
903 | ||
904 | /* /perf */ | |
905 | ret = config_writer_close_element(writer); | |
906 | if (ret) { | |
907 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
908 | goto end; | |
909 | } | |
910 | } else { | |
911 | /* Save context as event_context_type_type */ | |
912 | context_type_string = get_ust_context_type_string( | |
913 | ctx->ctx.ctx); | |
914 | if (!context_type_string) { | |
915 | ERR("Unsupported UST context type.") | |
916 | ret = LTTNG_ERR_INVALID; | |
917 | goto end; | |
918 | } | |
919 | ||
920 | ret = config_writer_write_element_string(writer, | |
921 | config_element_type, context_type_string); | |
922 | if (ret) { | |
923 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
924 | goto end; | |
925 | } | |
fb198a11 JG |
926 | } |
927 | ||
928 | /* /context */ | |
929 | ret = config_writer_close_element(writer); | |
930 | if (ret) { | |
931 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
932 | goto end; | |
933 | } | |
934 | } | |
935 | ||
936 | /* /contexts */ | |
937 | ret = config_writer_close_element(writer); | |
938 | if (ret) { | |
939 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
940 | goto end; | |
941 | } | |
942 | end: | |
943 | return ret; | |
944 | } | |
945 | ||
946 | static | |
947 | int save_kernel_channel(struct config_writer *writer, | |
948 | struct ltt_kernel_channel *kchan) | |
949 | { | |
950 | int ret; | |
951 | ||
952 | assert(writer); | |
953 | assert(kchan); | |
954 | ||
955 | ret = config_writer_open_element(writer, config_element_channel); | |
956 | if (ret) { | |
957 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
958 | goto end; | |
959 | } | |
960 | ||
961 | ret = config_writer_write_element_string(writer, config_element_name, | |
962 | kchan->channel->name); | |
963 | if (ret) { | |
964 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
965 | goto end; | |
966 | } | |
967 | ||
968 | ret = config_writer_write_element_bool(writer, config_element_enabled, | |
969 | kchan->channel->enabled); | |
970 | if (ret) { | |
971 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
972 | goto end; | |
973 | } | |
974 | ||
975 | ret = save_kernel_channel_attributes(writer, &kchan->channel->attr); | |
976 | if (ret) { | |
977 | goto end; | |
978 | } | |
979 | ||
0de3eda1 | 980 | ret = save_kernel_events(writer, kchan); |
fb198a11 JG |
981 | if (ret) { |
982 | goto end; | |
983 | } | |
984 | ||
645328ae | 985 | ret = save_kernel_contexts(writer, kchan); |
fb198a11 JG |
986 | if (ret) { |
987 | goto end; | |
988 | } | |
989 | ||
990 | /* /channel */ | |
991 | ret = config_writer_close_element(writer); | |
992 | if (ret) { | |
993 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
994 | goto end; | |
995 | } | |
996 | end: | |
997 | return ret; | |
998 | } | |
999 | ||
1000 | static | |
1001 | int save_ust_channel(struct config_writer *writer, | |
1002 | struct ltt_ust_channel *ust_chan, | |
1003 | struct ltt_ust_session *session) | |
1004 | { | |
1005 | int ret; | |
1006 | ||
1007 | assert(writer); | |
1008 | assert(ust_chan); | |
1009 | assert(session); | |
1010 | ||
1011 | ret = config_writer_open_element(writer, config_element_channel); | |
1012 | if (ret) { | |
1013 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1014 | goto end; | |
1015 | } | |
1016 | ||
1017 | ret = config_writer_write_element_string(writer, config_element_name, | |
1018 | ust_chan->name); | |
1019 | if (ret) { | |
1020 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1021 | goto end; | |
1022 | } | |
1023 | ||
1024 | ret = config_writer_write_element_bool(writer, config_element_enabled, | |
1025 | ust_chan->enabled); | |
1026 | if (ret) { | |
1027 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1028 | goto end; | |
1029 | } | |
1030 | ||
1031 | ret = save_ust_channel_attributes(writer, &ust_chan->attr); | |
1032 | if (ret) { | |
1033 | goto end; | |
1034 | } | |
1035 | ||
1036 | ret = config_writer_write_element_unsigned_int(writer, | |
1037 | config_element_tracefile_size, ust_chan->tracefile_size); | |
1038 | if (ret) { | |
1039 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1040 | goto end; | |
1041 | } | |
1042 | ||
1043 | ret = config_writer_write_element_unsigned_int(writer, | |
1044 | config_element_tracefile_count, ust_chan->tracefile_count); | |
1045 | if (ret) { | |
1046 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1047 | goto end; | |
1048 | } | |
1049 | ||
1050 | ret = config_writer_write_element_unsigned_int(writer, | |
1051 | config_element_live_timer_interval, | |
1052 | session->live_timer_interval); | |
1053 | if (ret) { | |
1054 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1055 | goto end; | |
1056 | } | |
1057 | ||
1058 | ret = save_ust_events(writer, ust_chan->events); | |
1059 | if (ret) { | |
1060 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1061 | goto end; | |
1062 | } | |
1063 | ||
1064 | ret = save_ust_context(writer, &ust_chan->ctx_list); | |
1065 | if (ret) { | |
1066 | goto end; | |
1067 | } | |
1068 | ||
1069 | /* /channel */ | |
1070 | ret = config_writer_close_element(writer); | |
1071 | if (ret) { | |
1072 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1073 | goto end; | |
1074 | } | |
1075 | end: | |
1076 | return ret; | |
1077 | } | |
1078 | ||
1079 | static | |
1080 | int save_kernel_session(struct config_writer *writer, | |
1081 | struct ltt_session *session) | |
1082 | { | |
1083 | int ret; | |
1084 | struct ltt_kernel_channel *kchan; | |
1085 | ||
1086 | assert(writer); | |
1087 | assert(session); | |
1088 | ||
1089 | ret = config_writer_write_element_string(writer, config_element_type, | |
1090 | config_domain_type_kernel); | |
1091 | if (ret) { | |
1092 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1093 | goto end; | |
1094 | } | |
1095 | ||
1096 | ret = config_writer_write_element_string(writer, | |
1097 | config_element_buffer_type, config_buffer_type_global); | |
1098 | if (ret) { | |
1099 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1100 | goto end; | |
1101 | } | |
1102 | ||
1103 | ret = config_writer_open_element(writer, | |
1104 | config_element_channels); | |
1105 | if (ret) { | |
1106 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1107 | goto end; | |
1108 | } | |
1109 | ||
1110 | cds_list_for_each_entry(kchan, &session->kernel_session->channel_list.head, | |
1111 | list) { | |
1112 | ret = save_kernel_channel(writer, kchan); | |
1113 | if (ret) { | |
1114 | goto end; | |
1115 | } | |
1116 | } | |
1117 | ||
1118 | /* /channels */ | |
1119 | ret = config_writer_close_element(writer); | |
1120 | if (ret) { | |
1121 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1122 | goto end; | |
1123 | } | |
1124 | end: | |
1125 | return ret; | |
1126 | } | |
1127 | ||
1128 | static | |
1129 | int save_ust_session(struct config_writer *writer, | |
022d91ba | 1130 | struct ltt_session *session, int save_agent) |
fb198a11 JG |
1131 | { |
1132 | int ret; | |
1133 | struct ltt_ust_channel *ust_chan; | |
1134 | const char *buffer_type_string; | |
1135 | struct lttng_ht_node_str *node; | |
1136 | struct lttng_ht_iter iter; | |
1137 | ||
1138 | assert(writer); | |
1139 | assert(session); | |
1140 | ||
1141 | ret = config_writer_write_element_string(writer, config_element_type, | |
022d91ba | 1142 | save_agent ? config_domain_type_jul : config_domain_type_ust); |
fb198a11 JG |
1143 | if (ret) { |
1144 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1145 | goto end; | |
1146 | } | |
1147 | ||
1148 | buffer_type_string = get_buffer_type_string( | |
1149 | session->ust_session->buffer_type); | |
1150 | if (!buffer_type_string) { | |
1151 | ERR("Unsupported buffer type."); | |
1152 | ret = LTTNG_ERR_INVALID; | |
1153 | goto end; | |
1154 | } | |
1155 | ||
1156 | ret = config_writer_write_element_string(writer, | |
1157 | config_element_buffer_type, buffer_type_string); | |
1158 | if (ret) { | |
1159 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1160 | goto end; | |
1161 | } | |
1162 | ||
1163 | ret = config_writer_open_element(writer, config_element_channels); | |
1164 | if (ret) { | |
1165 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1166 | goto end; | |
1167 | } | |
1168 | ||
1169 | rcu_read_lock(); | |
1170 | cds_lfht_for_each_entry(session->ust_session->domain_global.channels->ht, | |
1171 | &iter.iter, node, node) { | |
022d91ba | 1172 | int agent_channel; |
fb198a11 JG |
1173 | |
1174 | ust_chan = caa_container_of(node, struct ltt_ust_channel, node); | |
da6c3a50 | 1175 | agent_channel = !strcmp(DEFAULT_JUL_CHANNEL_NAME, ust_chan->name) || |
0e115563 DG |
1176 | !strcmp(DEFAULT_LOG4J_CHANNEL_NAME, ust_chan->name) || |
1177 | !strcmp(DEFAULT_PYTHON_CHANNEL_NAME, ust_chan->name); | |
022d91ba | 1178 | if (!(save_agent ^ agent_channel)) { |
fb198a11 JG |
1179 | ret = save_ust_channel(writer, ust_chan, session->ust_session); |
1180 | if (ret) { | |
1181 | rcu_read_unlock(); | |
1182 | goto end; | |
1183 | } | |
1184 | } | |
1185 | } | |
1186 | rcu_read_unlock(); | |
1187 | ||
1188 | /* /channels */ | |
1189 | ret = config_writer_close_element(writer); | |
1190 | if (ret) { | |
1191 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1192 | goto end; | |
1193 | } | |
1194 | end: | |
1195 | return ret; | |
1196 | } | |
1197 | ||
847a5916 JR |
1198 | static |
1199 | int save_pid_tracker(struct config_writer *writer, | |
1200 | struct ltt_session *sess, int domain) | |
1201 | { | |
1202 | int ret = 0; | |
1203 | ssize_t nr_pids = 0, i; | |
1204 | int32_t *pids = NULL; | |
1205 | ||
1206 | switch (domain) { | |
1207 | case LTTNG_DOMAIN_KERNEL: | |
1208 | { | |
1209 | nr_pids = kernel_list_tracker_pids(sess->kernel_session, &pids); | |
1210 | if (nr_pids < 0) { | |
1211 | ret = LTTNG_ERR_KERN_LIST_FAIL; | |
1212 | goto end; | |
1213 | } | |
1214 | break; | |
1215 | } | |
1216 | case LTTNG_DOMAIN_UST: | |
1217 | { | |
1218 | nr_pids = trace_ust_list_tracker_pids(sess->ust_session, &pids); | |
1219 | if (nr_pids < 0) { | |
1220 | ret = LTTNG_ERR_UST_LIST_FAIL; | |
1221 | goto end; | |
1222 | } | |
1223 | break; | |
1224 | } | |
1225 | case LTTNG_DOMAIN_JUL: | |
1226 | case LTTNG_DOMAIN_LOG4J: | |
1227 | case LTTNG_DOMAIN_PYTHON: | |
1228 | default: | |
1229 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; | |
1230 | goto end; | |
1231 | } | |
1232 | ||
1233 | /* Only create a pid_tracker if enabled or untrack all */ | |
1234 | if (nr_pids != 1 || (nr_pids == 1 && pids[0] != -1)) { | |
1235 | ret = config_writer_open_element(writer, | |
1236 | config_element_pid_tracker); | |
1237 | if (ret) { | |
1238 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1239 | goto end; | |
1240 | } | |
1241 | ||
1242 | ret = config_writer_open_element(writer, | |
1243 | config_element_targets); | |
1244 | if (ret) { | |
1245 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1246 | goto end; | |
1247 | } | |
1248 | ||
1249 | for (i = 0; i < nr_pids; i++) { | |
1250 | ret = config_writer_open_element(writer, | |
1251 | config_element_target_pid); | |
1252 | if (ret) { | |
1253 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1254 | goto end; | |
1255 | } | |
1256 | ||
1257 | ret = config_writer_write_element_unsigned_int(writer, | |
1258 | config_element_pid, pids[i]); | |
1259 | if (ret) { | |
1260 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1261 | goto end; | |
1262 | } | |
1263 | ||
1264 | /* /pid_target */ | |
1265 | ret = config_writer_close_element(writer); | |
1266 | if (ret) { | |
1267 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1268 | goto end; | |
1269 | } | |
1270 | } | |
1271 | ||
1272 | /* /targets */ | |
1273 | ret = config_writer_close_element(writer); | |
1274 | if (ret) { | |
1275 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1276 | goto end; | |
1277 | } | |
1278 | ||
1279 | /* /pid_tracker */ | |
1280 | ret = config_writer_close_element(writer); | |
1281 | if (ret) { | |
1282 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1283 | goto end; | |
1284 | } | |
1285 | } | |
1286 | end: | |
1287 | free(pids); | |
1288 | return ret; | |
1289 | } | |
1290 | ||
fb198a11 JG |
1291 | static |
1292 | int save_domains(struct config_writer *writer, struct ltt_session *session) | |
1293 | { | |
1294 | int ret = 0; | |
1295 | ||
1296 | assert(writer); | |
1297 | assert(session); | |
1298 | ||
1299 | if (!session->kernel_session && !session->ust_session) { | |
1300 | goto end; | |
1301 | } | |
1302 | ||
1303 | ret = config_writer_open_element(writer, config_element_domains); | |
1304 | if (ret) { | |
1305 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1306 | goto end; | |
1307 | } | |
1308 | ||
1309 | ||
1310 | if (session->kernel_session) { | |
1311 | ret = config_writer_open_element(writer, | |
1312 | config_element_domain); | |
1313 | if (ret) { | |
1314 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1315 | goto end; | |
1316 | } | |
1317 | ||
1318 | ret = save_kernel_session(writer, session); | |
1319 | if (ret) { | |
1320 | goto end; | |
1321 | } | |
1322 | ||
847a5916 JR |
1323 | ret = config_writer_open_element(writer, |
1324 | config_element_trackers); | |
1325 | if (ret) { | |
1326 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1327 | goto end; | |
1328 | } | |
1329 | ||
1330 | ret = save_pid_tracker(writer, session, LTTNG_DOMAIN_KERNEL); | |
1331 | if (ret) { | |
1332 | goto end; | |
1333 | } | |
1334 | ||
1335 | /* /trackers */ | |
1336 | ret = config_writer_close_element(writer); | |
1337 | if (ret) { | |
1338 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1339 | goto end; | |
1340 | } | |
fb198a11 JG |
1341 | /* /domain */ |
1342 | ret = config_writer_close_element(writer); | |
1343 | if (ret) { | |
1344 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1345 | goto end; | |
1346 | } | |
1347 | } | |
1348 | ||
1349 | if (session->ust_session) { | |
65d72c41 JG |
1350 | unsigned long agent_count; |
1351 | ||
fb198a11 JG |
1352 | ret = config_writer_open_element(writer, |
1353 | config_element_domain); | |
1354 | if (ret) { | |
1355 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1356 | goto end; | |
1357 | } | |
1358 | ||
1359 | ret = save_ust_session(writer, session, 0); | |
1360 | if (ret) { | |
1361 | goto end; | |
1362 | } | |
1363 | ||
847a5916 JR |
1364 | ret = config_writer_open_element(writer, |
1365 | config_element_trackers); | |
1366 | if (ret) { | |
1367 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1368 | goto end; | |
1369 | } | |
1370 | ||
1371 | ret = save_pid_tracker(writer, session, LTTNG_DOMAIN_UST); | |
1372 | if (ret) { | |
1373 | goto end; | |
1374 | } | |
1375 | ||
1376 | /* /trackers */ | |
1377 | ret = config_writer_close_element(writer); | |
1378 | if (ret) { | |
1379 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1380 | goto end; | |
1381 | } | |
fb198a11 JG |
1382 | /* /domain */ |
1383 | ret = config_writer_close_element(writer); | |
1384 | if (ret) { | |
1385 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1386 | goto end; | |
1387 | } | |
fb198a11 | 1388 | |
65d72c41 JG |
1389 | rcu_read_lock(); |
1390 | agent_count = | |
1391 | lttng_ht_get_count(session->ust_session->agents); | |
1392 | rcu_read_unlock(); | |
fb198a11 | 1393 | |
65d72c41 JG |
1394 | if (agent_count > 0) { |
1395 | ret = config_writer_open_element(writer, | |
1396 | config_element_domain); | |
1397 | if (ret) { | |
1398 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1399 | goto end; | |
1400 | } | |
fb198a11 | 1401 | |
65d72c41 JG |
1402 | ret = save_ust_session(writer, session, 1); |
1403 | if (ret) { | |
1404 | goto end; | |
1405 | } | |
1406 | ||
1407 | /* /domain */ | |
1408 | ret = config_writer_close_element(writer); | |
1409 | if (ret) { | |
1410 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1411 | goto end; | |
1412 | } | |
fb198a11 JG |
1413 | } |
1414 | } | |
1415 | ||
1416 | /* /domains */ | |
1417 | ret = config_writer_close_element(writer); | |
1418 | if (ret) { | |
1419 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1420 | goto end; | |
1421 | } | |
1422 | end: | |
1423 | return ret; | |
1424 | } | |
1425 | ||
1426 | static | |
1427 | int save_consumer_output(struct config_writer *writer, | |
1428 | struct consumer_output *output) | |
1429 | { | |
1430 | int ret; | |
1431 | ||
1432 | assert(writer); | |
1433 | assert(output); | |
1434 | ||
1435 | ret = config_writer_open_element(writer, config_element_consumer_output); | |
1436 | if (ret) { | |
1437 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1438 | goto end; | |
1439 | } | |
1440 | ||
1441 | ret = config_writer_write_element_bool(writer, config_element_enabled, | |
1442 | output->enabled); | |
1443 | if (ret) { | |
1444 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1445 | goto end; | |
1446 | } | |
1447 | ||
1448 | ret = config_writer_open_element(writer, config_element_destination); | |
1449 | if (ret) { | |
1450 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1451 | goto end; | |
1452 | } | |
1453 | ||
1454 | switch (output->type) { | |
1455 | case CONSUMER_DST_LOCAL: | |
1456 | ret = config_writer_write_element_string(writer, | |
1457 | config_element_path, output->dst.trace_path); | |
1458 | if (ret) { | |
1459 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1460 | goto end; | |
1461 | } | |
1462 | break; | |
1463 | case CONSUMER_DST_NET: | |
1464 | { | |
1465 | char *uri; | |
1466 | ||
1467 | uri = zmalloc(PATH_MAX); | |
1468 | if (!uri) { | |
1469 | ret = LTTNG_ERR_NOMEM; | |
1470 | goto end; | |
1471 | } | |
1472 | ||
1473 | ret = config_writer_open_element(writer, config_element_net_output); | |
1474 | if (ret) { | |
1475 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1476 | goto end_net_output; | |
1477 | } | |
1478 | ||
1479 | if (output->dst.net.control_isset && | |
1480 | output->dst.net.data_isset) { | |
1481 | ret = uri_to_str_url(&output->dst.net.control, uri, PATH_MAX); | |
1482 | if (ret < 0) { | |
1483 | ret = LTTNG_ERR_INVALID; | |
1484 | goto end_net_output; | |
1485 | } | |
1486 | ||
1487 | ret = config_writer_write_element_string(writer, | |
1488 | config_element_control_uri, uri); | |
1489 | if (ret) { | |
1490 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1491 | goto end_net_output; | |
1492 | } | |
1493 | ||
1494 | ret = uri_to_str_url(&output->dst.net.data, 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_data_uri, uri); | |
1502 | if (ret) { | |
1503 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1504 | goto end_net_output; | |
1505 | } | |
1506 | ||
1507 | end_net_output: | |
1508 | free(uri); | |
1509 | if (ret) { | |
1510 | goto end; | |
1511 | } | |
1512 | } else { | |
1513 | ret = !output->dst.net.control_isset ? | |
1514 | LTTNG_ERR_URL_CTRL_MISS : | |
1515 | LTTNG_ERR_URL_DATA_MISS; | |
c39270e5 | 1516 | free(uri); |
fb198a11 JG |
1517 | goto end; |
1518 | } | |
1519 | ||
1520 | ret = config_writer_close_element(writer); | |
1521 | if (ret) { | |
1522 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1523 | goto end; | |
1524 | } | |
1525 | break; | |
1526 | } | |
1527 | default: | |
1528 | ERR("Unsupported consumer output type."); | |
1529 | ret = LTTNG_ERR_INVALID; | |
1530 | goto end; | |
1531 | } | |
1532 | ||
1533 | /* /destination */ | |
1534 | ret = config_writer_close_element(writer); | |
1535 | if (ret) { | |
1536 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1537 | goto end; | |
1538 | } | |
1539 | ||
1540 | /* /consumer_output */ | |
1541 | ret = config_writer_close_element(writer); | |
1542 | if (ret) { | |
1543 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1544 | goto end; | |
1545 | } | |
1546 | end: | |
1547 | return ret; | |
1548 | } | |
1549 | ||
1550 | static | |
1551 | int save_snapshot_outputs(struct config_writer *writer, | |
1552 | struct snapshot *snapshot) | |
1553 | { | |
1554 | int ret; | |
1555 | struct lttng_ht_iter iter; | |
1556 | struct snapshot_output *output; | |
1557 | ||
1558 | assert(writer); | |
1559 | assert(snapshot); | |
1560 | ||
1561 | ret = config_writer_open_element(writer, config_element_snapshot_outputs); | |
1562 | if (ret) { | |
1563 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1564 | goto end; | |
1565 | } | |
1566 | ||
1567 | rcu_read_lock(); | |
1568 | cds_lfht_for_each_entry(snapshot->output_ht->ht, &iter.iter, output, | |
1569 | node.node) { | |
1570 | ret = config_writer_open_element(writer, | |
1571 | config_element_output); | |
1572 | if (ret) { | |
1573 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1574 | goto end_unlock; | |
1575 | } | |
1576 | ||
1577 | ret = config_writer_write_element_string(writer, | |
1578 | config_element_name, output->name); | |
1579 | if (ret) { | |
1580 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1581 | goto end_unlock; | |
1582 | } | |
1583 | ||
1584 | ret = config_writer_write_element_unsigned_int(writer, | |
1585 | config_element_max_size, output->max_size); | |
1586 | if (ret) { | |
1587 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1588 | goto end_unlock; | |
1589 | } | |
1590 | ||
1591 | ret = save_consumer_output(writer, output->consumer); | |
1592 | if (ret) { | |
1593 | goto end_unlock; | |
1594 | } | |
1595 | ||
1596 | /* /output */ | |
1597 | ret = config_writer_close_element(writer); | |
1598 | if (ret) { | |
1599 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1600 | goto end_unlock; | |
1601 | } | |
1602 | } | |
1603 | rcu_read_unlock(); | |
1604 | ||
1605 | /* /snapshot_outputs */ | |
1606 | ret = config_writer_close_element(writer); | |
1607 | if (ret) { | |
1608 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1609 | goto end; | |
1610 | } | |
1611 | ||
1612 | end: | |
1613 | return ret; | |
1614 | end_unlock: | |
1615 | rcu_read_unlock(); | |
1616 | return ret; | |
1617 | } | |
1618 | ||
1619 | static | |
1620 | int save_session_output(struct config_writer *writer, | |
1621 | struct ltt_session *session) | |
1622 | { | |
1623 | int ret; | |
1624 | ||
1625 | assert(writer); | |
1626 | assert(session); | |
1627 | ||
1628 | if ((session->snapshot_mode && session->snapshot.nb_output == 0) || | |
1629 | (!session->snapshot_mode && !session->consumer)) { | |
1630 | /* Session is in no output mode */ | |
1631 | ret = 0; | |
1632 | goto end; | |
1633 | } | |
1634 | ||
1635 | ret = config_writer_open_element(writer, config_element_output); | |
1636 | if (ret) { | |
1637 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1638 | goto end; | |
1639 | } | |
1640 | ||
1641 | if (session->snapshot_mode) { | |
1642 | ret = save_snapshot_outputs(writer, &session->snapshot); | |
1643 | if (ret) { | |
1644 | goto end; | |
1645 | } | |
1646 | } else { | |
1647 | if (session->consumer) { | |
1648 | ret = save_consumer_output(writer, session->consumer); | |
1649 | if (ret) { | |
1650 | goto end; | |
1651 | } | |
1652 | } | |
1653 | } | |
1654 | ||
1655 | /* /output */ | |
1656 | ret = config_writer_close_element(writer); | |
1657 | if (ret) { | |
1658 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1659 | goto end; | |
1660 | } | |
1661 | end: | |
1662 | return ret; | |
1663 | } | |
1664 | ||
1665 | /* | |
1666 | * Save the given session. | |
1667 | * | |
1668 | * Return 0 on success else a LTTNG_ERR* code. | |
1669 | */ | |
1670 | static | |
1671 | int save_session(struct ltt_session *session, | |
1672 | struct lttng_save_session_attr *attr, lttng_sock_cred *creds) | |
1673 | { | |
1674 | int ret, fd; | |
db471218 | 1675 | unsigned int file_opened = 0; /* Indicate if the file has been opened */ |
fb198a11 JG |
1676 | char config_file_path[PATH_MAX]; |
1677 | size_t len; | |
1678 | struct config_writer *writer = NULL; | |
1679 | size_t session_name_len; | |
1680 | const char *provided_path; | |
1681 | ||
1682 | assert(session); | |
1683 | assert(attr); | |
1684 | assert(creds); | |
1685 | ||
1686 | session_name_len = strlen(session->name); | |
95a29ab8 | 1687 | memset(config_file_path, 0, sizeof(config_file_path)); |
fb198a11 JG |
1688 | |
1689 | if (!session_access_ok(session, | |
1690 | LTTNG_SOCK_GET_UID_CRED(creds), | |
1691 | LTTNG_SOCK_GET_GID_CRED(creds))) { | |
1692 | ret = LTTNG_ERR_EPERM; | |
1693 | goto end; | |
1694 | } | |
1695 | ||
1696 | provided_path = lttng_save_session_attr_get_output_url(attr); | |
1697 | if (provided_path) { | |
95a29ab8 | 1698 | DBG3("Save session in provided path %s", provided_path); |
fb198a11 | 1699 | len = strlen(provided_path); |
d2992717 | 1700 | if (len >= sizeof(config_file_path)) { |
fb198a11 JG |
1701 | ret = LTTNG_ERR_SET_URL; |
1702 | goto end; | |
1703 | } | |
1704 | strncpy(config_file_path, provided_path, len); | |
1705 | } else { | |
7e078ad1 | 1706 | ssize_t ret_len; |
fb198a11 JG |
1707 | char *home_dir = utils_get_user_home_dir( |
1708 | LTTNG_SOCK_GET_UID_CRED(creds)); | |
1709 | if (!home_dir) { | |
1710 | ret = LTTNG_ERR_SET_URL; | |
1711 | goto end; | |
1712 | } | |
1713 | ||
d2992717 | 1714 | ret_len = snprintf(config_file_path, sizeof(config_file_path), |
fb198a11 JG |
1715 | DEFAULT_SESSION_HOME_CONFIGPATH, home_dir); |
1716 | free(home_dir); | |
7e078ad1 | 1717 | if (ret_len < 0) { |
fb198a11 JG |
1718 | PERROR("snprintf save session"); |
1719 | ret = LTTNG_ERR_SET_URL; | |
1720 | goto end; | |
1721 | } | |
7e078ad1 | 1722 | len = ret_len; |
fb198a11 JG |
1723 | } |
1724 | ||
1725 | /* | |
d2992717 DG |
1726 | * Check the path fits in the config file path dst including the '/' |
1727 | * followed by trailing .lttng extension and the NULL terminated string. | |
fb198a11 | 1728 | */ |
d2992717 DG |
1729 | if ((len + session_name_len + 2 + |
1730 | sizeof(DEFAULT_SESSION_CONFIG_FILE_EXTENSION)) | |
1731 | > sizeof(config_file_path)) { | |
fb198a11 JG |
1732 | ret = LTTNG_ERR_SET_URL; |
1733 | goto end; | |
1734 | } | |
1735 | ||
1736 | ret = run_as_mkdir_recursive(config_file_path, S_IRWXU | S_IRWXG, | |
1737 | LTTNG_SOCK_GET_UID_CRED(creds), LTTNG_SOCK_GET_GID_CRED(creds)); | |
1738 | if (ret) { | |
1739 | ret = LTTNG_ERR_SET_URL; | |
1740 | goto end; | |
1741 | } | |
1742 | ||
d2992717 DG |
1743 | /* |
1744 | * At this point, we know that everything fits in the buffer. Validation | |
1745 | * was done just above. | |
1746 | */ | |
fb198a11 JG |
1747 | config_file_path[len++] = '/'; |
1748 | strncpy(config_file_path + len, session->name, session_name_len); | |
1749 | len += session_name_len; | |
1750 | strcpy(config_file_path + len, DEFAULT_SESSION_CONFIG_FILE_EXTENSION); | |
95a29ab8 DG |
1751 | len += sizeof(DEFAULT_SESSION_CONFIG_FILE_EXTENSION); |
1752 | config_file_path[len] = '\0'; | |
fb198a11 JG |
1753 | |
1754 | if (!access(config_file_path, F_OK) && !attr->overwrite) { | |
f9b57ab2 DG |
1755 | /* File exists, notify the user since the overwrite flag is off. */ |
1756 | ret = LTTNG_ERR_SAVE_FILE_EXIST; | |
fb198a11 JG |
1757 | goto end; |
1758 | } | |
1759 | ||
1760 | fd = run_as_open(config_file_path, O_CREAT | O_WRONLY | O_TRUNC, | |
1761 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP, | |
1762 | LTTNG_SOCK_GET_UID_CRED(creds), LTTNG_SOCK_GET_GID_CRED(creds)); | |
1763 | if (fd < 0) { | |
1764 | PERROR("Could not create configuration file"); | |
1765 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1766 | goto end; | |
1767 | } | |
db471218 | 1768 | file_opened = 1; |
fb198a11 | 1769 | |
705bb62f | 1770 | writer = config_writer_create(fd, 1); |
fb198a11 JG |
1771 | if (!writer) { |
1772 | ret = LTTNG_ERR_NOMEM; | |
1773 | goto end; | |
1774 | } | |
1775 | ||
1776 | ret = config_writer_open_element(writer, config_element_sessions); | |
1777 | if (ret) { | |
1778 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1779 | goto end; | |
1780 | } | |
1781 | ||
1782 | ret = config_writer_open_element(writer, config_element_session); | |
1783 | if (ret) { | |
1784 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1785 | goto end; | |
1786 | } | |
1787 | ||
1788 | ret = config_writer_write_element_string(writer, config_element_name, | |
1789 | session->name); | |
1790 | if (ret) { | |
1791 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1792 | goto end; | |
1793 | } | |
1794 | ||
9e7c9f56 JR |
1795 | if(session->shm_path[0] != '\0') { |
1796 | ret = config_writer_write_element_string(writer, | |
1797 | config_element_shared_memory_path, | |
1798 | session->shm_path); | |
1799 | if (ret) { | |
1800 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1801 | goto end; | |
1802 | } | |
1803 | } | |
1804 | ||
fb198a11 JG |
1805 | ret = save_domains(writer, session); |
1806 | if (ret) { | |
1807 | goto end; | |
1808 | } | |
1809 | ||
1810 | ret = config_writer_write_element_bool(writer, config_element_started, | |
8382cf6f | 1811 | session->active); |
fb198a11 JG |
1812 | if (ret) { |
1813 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1814 | goto end; | |
1815 | } | |
1816 | ||
1817 | if (session->snapshot_mode || session->live_timer) { | |
1818 | ret = config_writer_open_element(writer, config_element_attributes); | |
1819 | if (ret) { | |
1820 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1821 | goto end; | |
1822 | } | |
1823 | ||
1824 | if (session->snapshot_mode) { | |
1825 | ret = config_writer_write_element_bool(writer, | |
1826 | config_element_snapshot_mode, 1); | |
1827 | if (ret) { | |
1828 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1829 | goto end; | |
1830 | } | |
1831 | } else { | |
d98ad589 | 1832 | ret = config_writer_write_element_unsigned_int(writer, |
fb198a11 JG |
1833 | config_element_live_timer_interval, session->live_timer); |
1834 | if (ret) { | |
1835 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1836 | goto end; | |
1837 | } | |
1838 | } | |
1839 | ||
1840 | /* /attributes */ | |
1841 | ret = config_writer_close_element(writer); | |
1842 | if (ret) { | |
1843 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1844 | goto end; | |
1845 | } | |
1846 | } | |
1847 | ||
1848 | ret = save_session_output(writer, session); | |
1849 | if (ret) { | |
1850 | goto end; | |
1851 | } | |
1852 | ||
1853 | /* /session */ | |
1854 | ret = config_writer_close_element(writer); | |
1855 | if (ret) { | |
1856 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1857 | goto end; | |
1858 | } | |
1859 | ||
1860 | /* /sessions */ | |
1861 | ret = config_writer_close_element(writer); | |
1862 | if (ret) { | |
1863 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1864 | goto end; | |
1865 | } | |
1866 | end: | |
1867 | if (writer && config_writer_destroy(writer)) { | |
1868 | /* Preserve the original error code */ | |
1869 | ret = ret ? ret : LTTNG_ERR_SAVE_IO_FAIL; | |
1870 | } | |
1871 | if (ret) { | |
1872 | /* Delete file in case of error */ | |
db471218 | 1873 | if (file_opened && unlink(config_file_path)) { |
fb198a11 JG |
1874 | PERROR("Unlinking XML session configuration."); |
1875 | } | |
1876 | } | |
1877 | ||
1878 | return ret; | |
1879 | } | |
1880 | ||
1881 | int cmd_save_sessions(struct lttng_save_session_attr *attr, | |
1882 | lttng_sock_cred *creds) | |
1883 | { | |
1884 | int ret; | |
1885 | const char *session_name; | |
1886 | struct ltt_session *session; | |
1887 | ||
1888 | session_lock_list(); | |
1889 | ||
1890 | session_name = lttng_save_session_attr_get_session_name(attr); | |
1891 | if (session_name) { | |
1892 | session = session_find_by_name(session_name); | |
1893 | if (!session) { | |
1894 | ret = LTTNG_ERR_SESS_NOT_FOUND; | |
1895 | goto end; | |
1896 | } | |
1897 | ||
1898 | session_lock(session); | |
1899 | ret = save_session(session, attr, creds); | |
1900 | session_unlock(session); | |
1901 | if (ret) { | |
1902 | goto end; | |
1903 | } | |
1904 | } else { | |
1905 | struct ltt_session_list *list = session_get_list(); | |
1906 | ||
1907 | cds_list_for_each_entry(session, &list->head, list) { | |
1908 | session_lock(session); | |
1909 | ret = save_session(session, attr, creds); | |
1910 | session_unlock(session); | |
1911 | ||
1912 | /* Don't abort if we don't have the required permissions. */ | |
1913 | if (ret && ret != LTTNG_ERR_EPERM) { | |
1914 | goto end; | |
1915 | } | |
1916 | } | |
1917 | } | |
1918 | ret = LTTNG_OK; | |
1919 | ||
1920 | end: | |
1921 | session_unlock_list(); | |
1922 | return ret; | |
1923 | } |