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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 | ||
6c1c0768 | 18 | #define _LGPL_SOURCE |
fb198a11 JG |
19 | #include <assert.h> |
20 | #include <inttypes.h> | |
21 | #include <string.h> | |
22 | #include <urcu/uatomic.h> | |
23 | #include <unistd.h> | |
24 | ||
25 | #include <common/defaults.h> | |
26 | #include <common/error.h> | |
f40ef1d5 | 27 | #include <common/config/session-config.h> |
fb198a11 JG |
28 | #include <common/utils.h> |
29 | #include <common/runas.h> | |
30 | #include <lttng/save-internal.h> | |
31 | ||
847a5916 | 32 | #include "kernel.h" |
fb198a11 JG |
33 | #include "save.h" |
34 | #include "session.h" | |
0de3eda1 | 35 | #include "syscall.h" |
fb198a11 | 36 | #include "trace-ust.h" |
51755dc8 | 37 | #include "agent.h" |
fb198a11 JG |
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; | |
1ae5e83e JD |
235 | case LTTNG_KERNEL_CONTEXT_INTERRUPTIBLE: |
236 | context_type_string = config_event_context_interruptible; | |
237 | break; | |
238 | case LTTNG_KERNEL_CONTEXT_PREEMPTIBLE: | |
239 | context_type_string = config_event_context_preemptible; | |
240 | break; | |
241 | case LTTNG_KERNEL_CONTEXT_NEED_RESCHEDULE: | |
242 | context_type_string = config_event_context_need_reschedule; | |
243 | break; | |
244 | case LTTNG_KERNEL_CONTEXT_MIGRATABLE: | |
245 | context_type_string = config_event_context_migratable; | |
246 | break; | |
fb198a11 JG |
247 | default: |
248 | context_type_string = NULL; | |
249 | } | |
250 | ||
251 | return context_type_string; | |
252 | } | |
253 | ||
254 | static | |
255 | const char *get_ust_context_type_string( | |
256 | enum lttng_ust_context_type context_type) | |
257 | { | |
258 | const char *context_type_string; | |
259 | ||
260 | switch (context_type) { | |
261 | case LTTNG_UST_CONTEXT_PROCNAME: | |
262 | context_type_string = config_event_context_procname; | |
263 | break; | |
264 | case LTTNG_UST_CONTEXT_VPID: | |
265 | context_type_string = config_event_context_vpid; | |
266 | break; | |
267 | case LTTNG_UST_CONTEXT_VTID: | |
268 | context_type_string = config_event_context_vtid; | |
269 | break; | |
270 | case LTTNG_UST_CONTEXT_IP: | |
271 | context_type_string = config_event_context_ip; | |
272 | break; | |
273 | case LTTNG_UST_CONTEXT_PTHREAD_ID: | |
274 | context_type_string = config_event_context_pthread_id; | |
275 | break; | |
045fc617 JG |
276 | case LTTNG_UST_CONTEXT_APP_CONTEXT: |
277 | context_type_string = config_event_context_app; | |
278 | break; | |
e885a367 | 279 | case LTTNG_UST_CONTEXT_PERF_THREAD_COUNTER: |
14ce5bd8 JG |
280 | /* |
281 | * Error, should not be stored in the XML, perf contexts | |
282 | * are stored as a node of type event_perf_context_type. | |
283 | */ | |
fb198a11 JG |
284 | default: |
285 | context_type_string = NULL; | |
e885a367 | 286 | break; |
fb198a11 JG |
287 | } |
288 | ||
289 | return context_type_string; | |
290 | } | |
291 | ||
292 | static | |
293 | const char *get_buffer_type_string( | |
294 | enum lttng_buffer_type buffer_type) | |
295 | { | |
296 | const char *buffer_type_string; | |
297 | ||
298 | switch (buffer_type) { | |
299 | case LTTNG_BUFFER_PER_PID: | |
300 | buffer_type_string = config_buffer_type_per_pid; | |
301 | break; | |
302 | case LTTNG_BUFFER_PER_UID: | |
303 | buffer_type_string = config_buffer_type_per_uid; | |
304 | break; | |
305 | case LTTNG_BUFFER_GLOBAL: | |
306 | buffer_type_string = config_buffer_type_global; | |
307 | break; | |
308 | default: | |
309 | buffer_type_string = NULL; | |
310 | } | |
311 | ||
312 | return buffer_type_string; | |
313 | } | |
314 | ||
315 | static | |
316 | const char *get_loglevel_type_string( | |
317 | enum lttng_ust_loglevel_type loglevel_type) | |
318 | { | |
319 | const char *loglevel_type_string; | |
320 | ||
321 | switch (loglevel_type) { | |
322 | case LTTNG_UST_LOGLEVEL_ALL: | |
323 | loglevel_type_string = config_loglevel_type_all; | |
324 | break; | |
325 | case LTTNG_UST_LOGLEVEL_RANGE: | |
326 | loglevel_type_string = config_loglevel_type_range; | |
327 | break; | |
328 | case LTTNG_UST_LOGLEVEL_SINGLE: | |
329 | loglevel_type_string = config_loglevel_type_single; | |
330 | break; | |
331 | default: | |
332 | loglevel_type_string = NULL; | |
333 | } | |
334 | ||
335 | return loglevel_type_string; | |
336 | } | |
337 | ||
338 | static | |
339 | int save_kernel_event(struct config_writer *writer, | |
340 | struct ltt_kernel_event *event) | |
341 | { | |
342 | int ret; | |
343 | const char *instrumentation_type; | |
344 | ||
345 | ret = config_writer_open_element(writer, config_element_event); | |
346 | if (ret) { | |
347 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
348 | goto end; | |
349 | } | |
350 | ||
351 | if (event->event->name[0]) { | |
352 | ret = config_writer_write_element_string(writer, | |
353 | config_element_name, event->event->name); | |
354 | if (ret) { | |
355 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
356 | goto end; | |
357 | } | |
358 | } | |
359 | ||
360 | ret = config_writer_write_element_bool(writer, config_element_enabled, | |
361 | event->enabled); | |
362 | if (ret) { | |
363 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
364 | goto end; | |
365 | } | |
366 | ||
367 | instrumentation_type = get_kernel_instrumentation_string( | |
368 | event->event->instrumentation); | |
369 | if (!instrumentation_type) { | |
370 | ret = LTTNG_ERR_INVALID; | |
371 | goto end; | |
372 | } | |
373 | ||
374 | ret = config_writer_write_element_string(writer, config_element_type, | |
375 | instrumentation_type); | |
376 | if (ret) { | |
377 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
378 | goto end; | |
379 | } | |
380 | ||
911d1560 JG |
381 | if (event->filter_expression) { |
382 | ret = config_writer_write_element_string(writer, | |
383 | config_element_filter, | |
384 | event->filter_expression); | |
385 | if (ret) { | |
386 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
387 | goto end; | |
388 | } | |
389 | } | |
390 | ||
fb198a11 JG |
391 | if (event->event->instrumentation == LTTNG_KERNEL_FUNCTION || |
392 | event->event->instrumentation == LTTNG_KERNEL_KPROBE || | |
393 | event->event->instrumentation == LTTNG_KERNEL_KRETPROBE) { | |
394 | ||
395 | ret = config_writer_open_element(writer, | |
396 | config_element_attributes); | |
397 | if (ret) { | |
398 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
399 | goto end; | |
400 | } | |
401 | ||
402 | switch (event->event->instrumentation) { | |
0de3eda1 | 403 | case LTTNG_KERNEL_SYSCALL: |
fb198a11 JG |
404 | case LTTNG_KERNEL_FUNCTION: |
405 | ret = config_writer_open_element(writer, | |
406 | config_element_function_attributes); | |
407 | if (ret) { | |
408 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
409 | goto end; | |
410 | } | |
411 | ||
412 | ret = config_writer_write_element_string(writer, | |
413 | config_element_name, | |
414 | event->event->u.ftrace.symbol_name); | |
415 | if (ret) { | |
416 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
417 | goto end; | |
418 | } | |
419 | ||
420 | /* /function attributes */ | |
421 | ret = config_writer_close_element(writer); | |
422 | if (ret) { | |
423 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
424 | goto end; | |
425 | } | |
426 | break; | |
427 | case LTTNG_KERNEL_KPROBE: | |
428 | case LTTNG_KERNEL_KRETPROBE: | |
429 | { | |
430 | const char *symbol_name; | |
431 | uint64_t addr; | |
432 | uint64_t offset; | |
433 | ||
434 | if (event->event->instrumentation == | |
435 | LTTNG_KERNEL_KPROBE) { | |
436 | /* | |
437 | * Comments in lttng-kernel.h mention that | |
438 | * either addr or symbol_name are set, not both. | |
439 | */ | |
440 | addr = event->event->u.kprobe.addr; | |
441 | offset = event->event->u.kprobe.offset; | |
442 | symbol_name = addr ? NULL : | |
443 | event->event->u.kprobe.symbol_name; | |
444 | } else { | |
445 | symbol_name = | |
446 | event->event->u.kretprobe.symbol_name; | |
447 | addr = event->event->u.kretprobe.addr; | |
448 | offset = event->event->u.kretprobe.offset; | |
449 | } | |
450 | ||
451 | ret = config_writer_open_element(writer, | |
452 | config_element_probe_attributes); | |
453 | if (ret) { | |
454 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
455 | goto end; | |
456 | } | |
457 | ||
458 | if (symbol_name) { | |
459 | ret = config_writer_write_element_string(writer, | |
460 | config_element_symbol_name, | |
461 | symbol_name); | |
462 | if (ret) { | |
463 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
464 | goto end; | |
465 | } | |
466 | } | |
467 | ||
468 | if (addr) { | |
469 | ret = config_writer_write_element_unsigned_int( | |
470 | writer, config_element_address, addr); | |
471 | if (ret) { | |
472 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
473 | goto end; | |
474 | } | |
475 | } | |
476 | ||
477 | if (offset) { | |
478 | ret = config_writer_write_element_unsigned_int( | |
479 | writer, config_element_offset, offset); | |
480 | if (ret) { | |
481 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
482 | goto end; | |
483 | } | |
484 | } | |
485 | ||
486 | ret = config_writer_close_element(writer); | |
487 | if (ret) { | |
488 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
489 | goto end; | |
490 | } | |
491 | break; | |
492 | } | |
493 | default: | |
494 | ERR("Unsupported kernel instrumentation type."); | |
495 | ret = LTTNG_ERR_INVALID; | |
496 | goto end; | |
497 | } | |
498 | ||
499 | /* /attributes */ | |
500 | ret = config_writer_close_element(writer); | |
501 | if (ret) { | |
502 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
503 | goto end; | |
504 | } | |
505 | } | |
506 | ||
507 | /* /event */ | |
508 | ret = config_writer_close_element(writer); | |
509 | if (ret) { | |
510 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
511 | goto end; | |
512 | } | |
513 | end: | |
514 | return ret; | |
515 | } | |
516 | ||
517 | static | |
518 | int save_kernel_events(struct config_writer *writer, | |
0de3eda1 | 519 | struct ltt_kernel_channel *kchan) |
fb198a11 JG |
520 | { |
521 | int ret; | |
522 | struct ltt_kernel_event *event; | |
523 | ||
524 | ret = config_writer_open_element(writer, config_element_events); | |
525 | if (ret) { | |
526 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
527 | goto end; | |
528 | } | |
529 | ||
0de3eda1 | 530 | cds_list_for_each_entry(event, &kchan->events_list.head, list) { |
fb198a11 JG |
531 | ret = save_kernel_event(writer, event); |
532 | if (ret) { | |
533 | goto end; | |
534 | } | |
535 | } | |
536 | ||
537 | /* /events */ | |
538 | ret = config_writer_close_element(writer); | |
539 | if (ret) { | |
540 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
541 | goto end; | |
542 | } | |
543 | end: | |
544 | return ret; | |
545 | } | |
546 | ||
547 | static | |
548 | int save_ust_event(struct config_writer *writer, | |
549 | struct ltt_ust_event *event) | |
550 | { | |
551 | int ret; | |
552 | const char *loglevel_type_string; | |
553 | ||
554 | ret = config_writer_open_element(writer, config_element_event); | |
555 | if (ret) { | |
556 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
557 | goto end; | |
558 | } | |
559 | ||
560 | if (event->attr.name[0]) { | |
561 | ret = config_writer_write_element_string(writer, | |
562 | config_element_name, event->attr.name); | |
563 | if (ret) { | |
564 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
565 | goto end; | |
566 | } | |
567 | } | |
568 | ||
569 | ret = config_writer_write_element_bool(writer, config_element_enabled, | |
570 | event->enabled); | |
571 | if (ret) { | |
572 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
573 | goto end; | |
574 | } | |
575 | ||
576 | if (event->attr.instrumentation != LTTNG_UST_TRACEPOINT) { | |
577 | ERR("Unsupported UST instrumentation type."); | |
578 | ret = LTTNG_ERR_INVALID; | |
579 | goto end; | |
580 | } | |
581 | ret = config_writer_write_element_string(writer, config_element_type, | |
582 | config_event_type_tracepoint); | |
583 | if (ret) { | |
584 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
585 | goto end; | |
586 | } | |
587 | ||
588 | loglevel_type_string = get_loglevel_type_string( | |
589 | event->attr.loglevel_type); | |
590 | if (!loglevel_type_string) { | |
591 | ERR("Unsupported UST loglevel type."); | |
592 | ret = LTTNG_ERR_INVALID; | |
593 | goto end; | |
594 | } | |
595 | ||
596 | ret = config_writer_write_element_string(writer, | |
597 | config_element_loglevel_type, loglevel_type_string); | |
598 | if (ret) { | |
599 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
600 | goto end; | |
601 | } | |
602 | ||
1adbdb10 JG |
603 | /* The log level is irrelevant if no "filtering" is enabled */ |
604 | if (event->attr.loglevel_type != LTTNG_UST_LOGLEVEL_ALL) { | |
605 | ret = config_writer_write_element_signed_int(writer, | |
606 | config_element_loglevel, event->attr.loglevel); | |
607 | if (ret) { | |
608 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
609 | goto end; | |
610 | } | |
fb198a11 JG |
611 | } |
612 | ||
613 | if (event->filter_expression) { | |
614 | ret = config_writer_write_element_string(writer, | |
615 | config_element_filter, event->filter_expression); | |
616 | if (ret) { | |
617 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
618 | goto end; | |
619 | } | |
620 | } | |
621 | ||
622 | if (event->exclusion && event->exclusion->count) { | |
623 | uint32_t i; | |
624 | ||
625 | ret = config_writer_open_element(writer, | |
626 | config_element_exclusions); | |
627 | if (ret) { | |
628 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
629 | goto end; | |
630 | } | |
631 | ||
632 | for (i = 0; i < event->exclusion->count; i++) { | |
633 | ret = config_writer_write_element_string(writer, | |
634 | config_element_exclusion, | |
d7af3565 PP |
635 | LTTNG_EVENT_EXCLUSION_NAME_AT( |
636 | event->exclusion, i)); | |
fb198a11 JG |
637 | if (ret) { |
638 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
639 | goto end; | |
640 | } | |
641 | } | |
642 | ||
643 | /* /exclusions */ | |
644 | ret = config_writer_close_element(writer); | |
645 | if (ret) { | |
646 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
647 | goto end; | |
648 | } | |
649 | } | |
650 | ||
651 | /* /event */ | |
652 | ret = config_writer_close_element(writer); | |
653 | if (ret) { | |
654 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
655 | goto end; | |
656 | } | |
657 | end: | |
658 | return ret; | |
659 | } | |
660 | ||
661 | static | |
662 | int save_ust_events(struct config_writer *writer, | |
663 | struct lttng_ht *events) | |
664 | { | |
665 | int ret; | |
666 | struct ltt_ust_event *event; | |
667 | struct lttng_ht_node_str *node; | |
668 | struct lttng_ht_iter iter; | |
669 | ||
670 | ret = config_writer_open_element(writer, config_element_events); | |
671 | if (ret) { | |
672 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
673 | goto end; | |
674 | } | |
675 | ||
676 | rcu_read_lock(); | |
677 | cds_lfht_for_each_entry(events->ht, &iter.iter, node, node) { | |
678 | event = caa_container_of(node, struct ltt_ust_event, node); | |
679 | ||
af325ba1 JG |
680 | if (event->internal) { |
681 | /* Internal events must not be exposed to clients */ | |
682 | continue; | |
683 | } | |
fb198a11 JG |
684 | ret = save_ust_event(writer, event); |
685 | if (ret) { | |
686 | rcu_read_unlock(); | |
687 | goto end; | |
688 | } | |
689 | } | |
690 | rcu_read_unlock(); | |
691 | ||
692 | /* /events */ | |
693 | ret = config_writer_close_element(writer); | |
694 | if (ret) { | |
695 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
696 | goto end; | |
697 | } | |
698 | end: | |
699 | return ret; | |
700 | } | |
701 | ||
51755dc8 | 702 | static |
0b35b846 | 703 | int init_ust_event_from_agent_event(struct ltt_ust_event *ust_event, |
51755dc8 JG |
704 | struct agent_event *agent_event) |
705 | { | |
0b35b846 JG |
706 | int ret = 0; |
707 | enum lttng_ust_loglevel_type ust_loglevel_type; | |
708 | ||
51755dc8 JG |
709 | ust_event->enabled = agent_event->enabled; |
710 | ust_event->attr.instrumentation = LTTNG_UST_TRACEPOINT; | |
d333bdaa MD |
711 | if (lttng_strncpy(ust_event->attr.name, agent_event->name, |
712 | LTTNG_SYMBOL_NAME_LEN)) { | |
713 | ret = -1; | |
714 | goto end; | |
715 | } | |
0b35b846 JG |
716 | switch (agent_event->loglevel_type) { |
717 | case LTTNG_EVENT_LOGLEVEL_ALL: | |
718 | ust_loglevel_type = LTTNG_UST_LOGLEVEL_ALL; | |
719 | break; | |
720 | case LTTNG_EVENT_LOGLEVEL_SINGLE: | |
721 | ust_loglevel_type = LTTNG_UST_LOGLEVEL_SINGLE; | |
722 | break; | |
723 | case LTTNG_EVENT_LOGLEVEL_RANGE: | |
724 | ust_loglevel_type = LTTNG_UST_LOGLEVEL_RANGE; | |
725 | break; | |
726 | default: | |
727 | ERR("Invalid agent_event loglevel_type."); | |
728 | ret = -1; | |
729 | goto end; | |
730 | } | |
731 | ||
732 | ust_event->attr.loglevel_type = ust_loglevel_type; | |
2106efa0 | 733 | ust_event->attr.loglevel = agent_event->loglevel_value; |
51755dc8 JG |
734 | ust_event->filter_expression = agent_event->filter_expression; |
735 | ust_event->exclusion = agent_event->exclusion; | |
0b35b846 JG |
736 | end: |
737 | return ret; | |
51755dc8 JG |
738 | } |
739 | ||
740 | static | |
741 | int save_agent_events(struct config_writer *writer, | |
742 | struct ltt_ust_channel *chan, | |
743 | struct agent *agent) | |
744 | { | |
745 | int ret; | |
746 | struct lttng_ht_iter iter; | |
747 | struct lttng_ht_node_str *node; | |
748 | ||
749 | ret = config_writer_open_element(writer, config_element_events); | |
750 | if (ret) { | |
751 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
752 | goto end; | |
753 | } | |
754 | ||
755 | rcu_read_lock(); | |
756 | cds_lfht_for_each_entry(agent->events->ht, &iter.iter, node, node) { | |
757 | int ret; | |
758 | struct agent_event *agent_event; | |
759 | struct ltt_ust_event fake_event; | |
760 | ||
761 | memset(&fake_event, 0, sizeof(fake_event)); | |
762 | agent_event = caa_container_of(node, struct agent_event, node); | |
763 | ||
764 | /* | |
765 | * Initialize a fake ust event to reuse the same serialization | |
766 | * function since UST and agent events contain the same info | |
767 | * (and one could wonder why they don't reuse the same | |
768 | * structures...). | |
769 | */ | |
0b35b846 JG |
770 | ret = init_ust_event_from_agent_event(&fake_event, agent_event); |
771 | if (ret) { | |
772 | rcu_read_unlock(); | |
773 | goto end; | |
774 | } | |
51755dc8 JG |
775 | ret = save_ust_event(writer, &fake_event); |
776 | if (ret) { | |
777 | rcu_read_unlock(); | |
778 | goto end; | |
779 | } | |
780 | } | |
781 | rcu_read_unlock(); | |
782 | ||
783 | /* /events */ | |
784 | ret = config_writer_close_element(writer); | |
785 | if (ret) { | |
786 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
787 | goto end; | |
788 | } | |
789 | end: | |
790 | return ret; | |
791 | } | |
792 | ||
fb198a11 JG |
793 | static |
794 | int save_kernel_context(struct config_writer *writer, | |
795 | struct lttng_kernel_context *ctx) | |
796 | { | |
797 | int ret = 0; | |
798 | ||
799 | if (!ctx) { | |
800 | goto end; | |
801 | } | |
802 | ||
fb198a11 JG |
803 | ret = config_writer_open_element(writer, config_element_context); |
804 | if (ret) { | |
805 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
806 | goto end; | |
807 | } | |
808 | ||
cba45eda | 809 | if (ctx->ctx == LTTNG_KERNEL_CONTEXT_PERF_CPU_COUNTER) { |
045fc617 JG |
810 | ret = config_writer_open_element(writer, |
811 | config_element_context_perf); | |
fb198a11 JG |
812 | if (ret) { |
813 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
814 | goto end; | |
815 | } | |
816 | ||
817 | ret = config_writer_write_element_unsigned_int(writer, | |
818 | config_element_type, ctx->u.perf_counter.type); | |
819 | if (ret) { | |
820 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
821 | goto end; | |
822 | } | |
823 | ||
824 | ret = config_writer_write_element_unsigned_int(writer, | |
825 | config_element_config, ctx->u.perf_counter.config); | |
826 | if (ret) { | |
827 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
828 | goto end; | |
829 | } | |
830 | ||
831 | ret = config_writer_write_element_string(writer, | |
832 | config_element_name, ctx->u.perf_counter.name); | |
833 | if (ret) { | |
834 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
835 | goto end; | |
836 | } | |
837 | ||
838 | /* /perf */ | |
839 | ret = config_writer_close_element(writer); | |
840 | if (ret) { | |
841 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
842 | goto end; | |
843 | } | |
844 | } else { | |
845 | const char *context_type_string = | |
846 | get_kernel_context_type_string(ctx->ctx); | |
847 | ||
848 | if (!context_type_string) { | |
849 | ERR("Unsupported kernel context type."); | |
850 | ret = LTTNG_ERR_INVALID; | |
851 | goto end; | |
852 | } | |
853 | ||
854 | ret = config_writer_write_element_string(writer, | |
855 | config_element_type, context_type_string); | |
856 | if (ret) { | |
857 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
858 | goto end; | |
859 | } | |
860 | } | |
861 | ||
862 | /* /context */ | |
863 | ret = config_writer_close_element(writer); | |
864 | if (ret) { | |
865 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
866 | goto end; | |
867 | } | |
868 | ||
645328ae DG |
869 | end: |
870 | return ret; | |
871 | } | |
872 | ||
873 | static | |
874 | int save_kernel_contexts(struct config_writer *writer, | |
875 | struct ltt_kernel_channel *kchan) | |
876 | { | |
877 | int ret; | |
878 | struct ltt_kernel_context *ctx; | |
879 | ||
2aa64052 JG |
880 | if (cds_list_empty(&kchan->ctx_list)) { |
881 | ret = 0; | |
882 | goto end; | |
883 | } | |
884 | ||
645328ae DG |
885 | ret = config_writer_open_element(writer, config_element_contexts); |
886 | if (ret) { | |
887 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
888 | goto end; | |
889 | } | |
890 | ||
891 | cds_list_for_each_entry(ctx, &kchan->ctx_list, list) { | |
892 | ret = save_kernel_context(writer, &ctx->ctx); | |
893 | if (ret) { | |
894 | goto end; | |
895 | } | |
896 | } | |
897 | ||
fb198a11 JG |
898 | /* /contexts */ |
899 | ret = config_writer_close_element(writer); | |
900 | if (ret) { | |
901 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
902 | goto end; | |
903 | } | |
904 | end: | |
905 | return ret; | |
906 | } | |
907 | ||
045fc617 JG |
908 | static |
909 | int save_ust_context_perf_thread_counter(struct config_writer *writer, | |
910 | struct ltt_ust_context *ctx) | |
911 | { | |
912 | int ret; | |
913 | ||
914 | assert(writer); | |
915 | assert(ctx); | |
916 | ||
917 | /* Perf contexts are saved as event_perf_context_type */ | |
918 | ret = config_writer_open_element(writer, config_element_context_perf); | |
919 | if (ret) { | |
920 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
921 | goto end; | |
922 | } | |
923 | ||
924 | ret = config_writer_write_element_unsigned_int(writer, | |
925 | config_element_type, ctx->ctx.u.perf_counter.type); | |
926 | if (ret) { | |
927 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
928 | goto end; | |
929 | } | |
930 | ||
931 | ret = config_writer_write_element_unsigned_int(writer, | |
932 | config_element_config, ctx->ctx.u.perf_counter.config); | |
933 | if (ret) { | |
934 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
935 | goto end; | |
936 | } | |
937 | ||
938 | ret = config_writer_write_element_string(writer, config_element_name, | |
939 | ctx->ctx.u.perf_counter.name); | |
940 | if (ret) { | |
941 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
942 | goto end; | |
943 | } | |
944 | ||
945 | /* /perf */ | |
946 | ret = config_writer_close_element(writer); | |
947 | if (ret) { | |
948 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
949 | goto end; | |
950 | } | |
951 | end: | |
952 | return ret; | |
953 | } | |
954 | ||
955 | static | |
956 | int save_ust_context_app_ctx(struct config_writer *writer, | |
957 | struct ltt_ust_context *ctx) | |
958 | { | |
959 | int ret; | |
960 | ||
961 | assert(writer); | |
962 | assert(ctx); | |
963 | ||
964 | /* Application contexts are saved as application_context_type */ | |
965 | ret = config_writer_open_element(writer, config_element_context_app); | |
966 | if (ret) { | |
967 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
968 | goto end; | |
969 | } | |
970 | ||
971 | ret = config_writer_write_element_string(writer, | |
972 | config_element_context_app_provider_name, | |
973 | ctx->ctx.u.app_ctx.provider_name); | |
974 | if (ret) { | |
975 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
976 | goto end; | |
977 | } | |
978 | ||
979 | ret = config_writer_write_element_string(writer, | |
980 | config_element_context_app_ctx_name, | |
981 | ctx->ctx.u.app_ctx.ctx_name); | |
982 | if (ret) { | |
983 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
984 | goto end; | |
985 | } | |
986 | ||
987 | /* /app */ | |
988 | ret = config_writer_close_element(writer); | |
989 | if (ret) { | |
990 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
991 | goto end; | |
992 | } | |
993 | end: | |
994 | return ret; | |
995 | } | |
996 | ||
997 | static | |
998 | int save_ust_context_generic(struct config_writer *writer, | |
999 | struct ltt_ust_context *ctx) | |
1000 | { | |
1001 | int ret; | |
1002 | const char *context_type_string; | |
1003 | ||
1004 | assert(writer); | |
1005 | assert(ctx); | |
1006 | ||
1007 | /* Save context as event_context_type_type */ | |
1008 | context_type_string = get_ust_context_type_string( | |
1009 | ctx->ctx.ctx); | |
1010 | if (!context_type_string) { | |
1011 | ERR("Unsupported UST context type."); | |
1012 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1013 | goto end; | |
1014 | } | |
1015 | ||
1016 | ret = config_writer_write_element_string(writer, | |
1017 | config_element_type, context_type_string); | |
1018 | if (ret) { | |
1019 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1020 | goto end; | |
1021 | } | |
1022 | end: | |
1023 | return ret; | |
1024 | } | |
1025 | ||
fb198a11 JG |
1026 | static |
1027 | int save_ust_context(struct config_writer *writer, | |
1028 | struct cds_list_head *ctx_list) | |
1029 | { | |
1030 | int ret; | |
1031 | struct ltt_ust_context *ctx; | |
1032 | ||
1033 | assert(writer); | |
1034 | assert(ctx_list); | |
1035 | ||
1036 | ret = config_writer_open_element(writer, config_element_contexts); | |
1037 | if (ret) { | |
1038 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1039 | goto end; | |
1040 | } | |
1041 | ||
1042 | cds_list_for_each_entry(ctx, ctx_list, list) { | |
fb198a11 JG |
1043 | ret = config_writer_open_element(writer, |
1044 | config_element_context); | |
1045 | if (ret) { | |
1046 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1047 | goto end; | |
1048 | } | |
1049 | ||
045fc617 JG |
1050 | switch (ctx->ctx.ctx) { |
1051 | case LTTNG_UST_CONTEXT_PERF_THREAD_COUNTER: | |
1052 | ret = save_ust_context_perf_thread_counter(writer, ctx); | |
1053 | break; | |
1054 | case LTTNG_UST_CONTEXT_APP_CONTEXT: | |
1055 | ret = save_ust_context_app_ctx(writer, ctx); | |
1056 | break; | |
1057 | default: | |
1058 | /* Save generic context. */ | |
1059 | ret = save_ust_context_generic(writer, ctx); | |
1060 | } | |
1061 | if (ret) { | |
1062 | goto end; | |
fb198a11 JG |
1063 | } |
1064 | ||
1065 | /* /context */ | |
1066 | ret = config_writer_close_element(writer); | |
1067 | if (ret) { | |
1068 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1069 | goto end; | |
1070 | } | |
1071 | } | |
1072 | ||
1073 | /* /contexts */ | |
1074 | ret = config_writer_close_element(writer); | |
1075 | if (ret) { | |
1076 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1077 | goto end; | |
1078 | } | |
1079 | end: | |
1080 | return ret; | |
1081 | } | |
1082 | ||
1083 | static | |
1084 | int save_kernel_channel(struct config_writer *writer, | |
1085 | struct ltt_kernel_channel *kchan) | |
1086 | { | |
1087 | int ret; | |
1088 | ||
1089 | assert(writer); | |
1090 | assert(kchan); | |
1091 | ||
1092 | ret = config_writer_open_element(writer, config_element_channel); | |
1093 | if (ret) { | |
1094 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1095 | goto end; | |
1096 | } | |
1097 | ||
1098 | ret = config_writer_write_element_string(writer, config_element_name, | |
1099 | kchan->channel->name); | |
1100 | if (ret) { | |
1101 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1102 | goto end; | |
1103 | } | |
1104 | ||
1105 | ret = config_writer_write_element_bool(writer, config_element_enabled, | |
1106 | kchan->channel->enabled); | |
1107 | if (ret) { | |
1108 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1109 | goto end; | |
1110 | } | |
1111 | ||
1112 | ret = save_kernel_channel_attributes(writer, &kchan->channel->attr); | |
1113 | if (ret) { | |
1114 | goto end; | |
1115 | } | |
1116 | ||
0de3eda1 | 1117 | ret = save_kernel_events(writer, kchan); |
fb198a11 JG |
1118 | if (ret) { |
1119 | goto end; | |
1120 | } | |
1121 | ||
645328ae | 1122 | ret = save_kernel_contexts(writer, kchan); |
fb198a11 JG |
1123 | if (ret) { |
1124 | goto end; | |
1125 | } | |
1126 | ||
1127 | /* /channel */ | |
1128 | ret = config_writer_close_element(writer); | |
1129 | if (ret) { | |
1130 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1131 | goto end; | |
1132 | } | |
1133 | end: | |
1134 | return ret; | |
1135 | } | |
1136 | ||
1137 | static | |
1138 | int save_ust_channel(struct config_writer *writer, | |
1139 | struct ltt_ust_channel *ust_chan, | |
1140 | struct ltt_ust_session *session) | |
1141 | { | |
1142 | int ret; | |
1143 | ||
1144 | assert(writer); | |
1145 | assert(ust_chan); | |
1146 | assert(session); | |
1147 | ||
1148 | ret = config_writer_open_element(writer, config_element_channel); | |
1149 | if (ret) { | |
1150 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1151 | goto end; | |
1152 | } | |
1153 | ||
1154 | ret = config_writer_write_element_string(writer, config_element_name, | |
1155 | ust_chan->name); | |
1156 | if (ret) { | |
1157 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1158 | goto end; | |
1159 | } | |
1160 | ||
1161 | ret = config_writer_write_element_bool(writer, config_element_enabled, | |
1162 | ust_chan->enabled); | |
1163 | if (ret) { | |
1164 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1165 | goto end; | |
1166 | } | |
1167 | ||
1168 | ret = save_ust_channel_attributes(writer, &ust_chan->attr); | |
1169 | if (ret) { | |
1170 | goto end; | |
1171 | } | |
1172 | ||
1173 | ret = config_writer_write_element_unsigned_int(writer, | |
1174 | config_element_tracefile_size, ust_chan->tracefile_size); | |
1175 | if (ret) { | |
1176 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1177 | goto end; | |
1178 | } | |
1179 | ||
1180 | ret = config_writer_write_element_unsigned_int(writer, | |
1181 | config_element_tracefile_count, ust_chan->tracefile_count); | |
1182 | if (ret) { | |
1183 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1184 | goto end; | |
1185 | } | |
1186 | ||
1187 | ret = config_writer_write_element_unsigned_int(writer, | |
1188 | config_element_live_timer_interval, | |
1189 | session->live_timer_interval); | |
1190 | if (ret) { | |
1191 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1192 | goto end; | |
1193 | } | |
1194 | ||
51755dc8 JG |
1195 | if (ust_chan->domain == LTTNG_DOMAIN_UST) { |
1196 | ret = save_ust_events(writer, ust_chan->events); | |
1197 | if (ret) { | |
1198 | goto end; | |
1199 | } | |
1200 | } else { | |
1201 | struct agent *agent = NULL; | |
1202 | ||
1203 | agent = trace_ust_find_agent(session, ust_chan->domain); | |
1204 | if (!agent) { | |
1205 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1206 | ERR("Could not find agent associated to UST subdomain"); | |
1207 | goto end; | |
1208 | } | |
1209 | ||
1210 | /* | |
1211 | * Channels associated with a UST sub-domain (such as JUL, Log4j | |
1212 | * or Python) don't have any non-internal events. We retrieve | |
1213 | * the "agent" events associated with this channel and serialize | |
1214 | * them. | |
1215 | */ | |
1216 | ret = save_agent_events(writer, ust_chan, agent); | |
1217 | if (ret) { | |
1218 | goto end; | |
1219 | } | |
fb198a11 JG |
1220 | } |
1221 | ||
1222 | ret = save_ust_context(writer, &ust_chan->ctx_list); | |
1223 | if (ret) { | |
1224 | goto end; | |
1225 | } | |
1226 | ||
1227 | /* /channel */ | |
1228 | ret = config_writer_close_element(writer); | |
1229 | if (ret) { | |
1230 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1231 | goto end; | |
1232 | } | |
1233 | end: | |
1234 | return ret; | |
1235 | } | |
1236 | ||
1237 | static | |
1238 | int save_kernel_session(struct config_writer *writer, | |
1239 | struct ltt_session *session) | |
1240 | { | |
1241 | int ret; | |
1242 | struct ltt_kernel_channel *kchan; | |
1243 | ||
1244 | assert(writer); | |
1245 | assert(session); | |
1246 | ||
1247 | ret = config_writer_write_element_string(writer, config_element_type, | |
1248 | config_domain_type_kernel); | |
1249 | if (ret) { | |
1250 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1251 | goto end; | |
1252 | } | |
1253 | ||
1254 | ret = config_writer_write_element_string(writer, | |
1255 | config_element_buffer_type, config_buffer_type_global); | |
1256 | if (ret) { | |
1257 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1258 | goto end; | |
1259 | } | |
1260 | ||
1261 | ret = config_writer_open_element(writer, | |
1262 | config_element_channels); | |
1263 | if (ret) { | |
1264 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1265 | goto end; | |
1266 | } | |
1267 | ||
1268 | cds_list_for_each_entry(kchan, &session->kernel_session->channel_list.head, | |
1269 | list) { | |
1270 | ret = save_kernel_channel(writer, kchan); | |
1271 | if (ret) { | |
1272 | goto end; | |
1273 | } | |
1274 | } | |
1275 | ||
1276 | /* /channels */ | |
1277 | ret = config_writer_close_element(writer); | |
1278 | if (ret) { | |
1279 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1280 | goto end; | |
1281 | } | |
1282 | end: | |
1283 | return ret; | |
1284 | } | |
1285 | ||
1286 | static | |
51755dc8 JG |
1287 | const char *get_config_domain_str(enum lttng_domain_type domain) |
1288 | { | |
1289 | const char *str_dom; | |
1290 | ||
1291 | switch (domain) { | |
1292 | case LTTNG_DOMAIN_KERNEL: | |
1293 | str_dom = config_domain_type_kernel; | |
1294 | break; | |
1295 | case LTTNG_DOMAIN_UST: | |
1296 | str_dom = config_domain_type_ust; | |
1297 | break; | |
1298 | case LTTNG_DOMAIN_JUL: | |
1299 | str_dom = config_domain_type_jul; | |
1300 | break; | |
1301 | case LTTNG_DOMAIN_LOG4J: | |
1302 | str_dom = config_domain_type_log4j; | |
1303 | break; | |
1304 | case LTTNG_DOMAIN_PYTHON: | |
1305 | str_dom = config_domain_type_python; | |
1306 | break; | |
1307 | default: | |
1308 | assert(0); | |
1309 | } | |
1310 | ||
1311 | return str_dom; | |
1312 | } | |
1313 | ||
e8fcabef JG |
1314 | static |
1315 | int save_pid_tracker(struct config_writer *writer, | |
1316 | struct ltt_session *sess, int domain) | |
1317 | { | |
1318 | int ret = 0; | |
1319 | ssize_t nr_pids = 0, i; | |
1320 | int32_t *pids = NULL; | |
1321 | ||
1322 | switch (domain) { | |
1323 | case LTTNG_DOMAIN_KERNEL: | |
1324 | { | |
1325 | nr_pids = kernel_list_tracker_pids(sess->kernel_session, &pids); | |
1326 | if (nr_pids < 0) { | |
1327 | ret = LTTNG_ERR_KERN_LIST_FAIL; | |
1328 | goto end; | |
1329 | } | |
1330 | break; | |
1331 | } | |
1332 | case LTTNG_DOMAIN_UST: | |
1333 | { | |
1334 | nr_pids = trace_ust_list_tracker_pids(sess->ust_session, &pids); | |
1335 | if (nr_pids < 0) { | |
1336 | ret = LTTNG_ERR_UST_LIST_FAIL; | |
1337 | goto end; | |
1338 | } | |
1339 | break; | |
1340 | } | |
1341 | case LTTNG_DOMAIN_JUL: | |
1342 | case LTTNG_DOMAIN_LOG4J: | |
1343 | case LTTNG_DOMAIN_PYTHON: | |
1344 | default: | |
1345 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; | |
1346 | goto end; | |
1347 | } | |
1348 | ||
1349 | /* Only create a pid_tracker if enabled or untrack all */ | |
1350 | if (nr_pids != 1 || (nr_pids == 1 && pids[0] != -1)) { | |
1351 | ret = config_writer_open_element(writer, | |
1352 | config_element_pid_tracker); | |
1353 | if (ret) { | |
1354 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1355 | goto end; | |
1356 | } | |
1357 | ||
1358 | ret = config_writer_open_element(writer, | |
1359 | config_element_targets); | |
1360 | if (ret) { | |
1361 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1362 | goto end; | |
1363 | } | |
1364 | ||
1365 | for (i = 0; i < nr_pids; i++) { | |
1366 | ret = config_writer_open_element(writer, | |
1367 | config_element_target_pid); | |
1368 | if (ret) { | |
1369 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1370 | goto end; | |
1371 | } | |
1372 | ||
1373 | ret = config_writer_write_element_unsigned_int(writer, | |
1374 | config_element_pid, pids[i]); | |
1375 | if (ret) { | |
1376 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1377 | goto end; | |
1378 | } | |
1379 | ||
1380 | /* /pid_target */ | |
1381 | ret = config_writer_close_element(writer); | |
1382 | if (ret) { | |
1383 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1384 | goto end; | |
1385 | } | |
1386 | } | |
1387 | ||
1388 | /* /targets */ | |
1389 | ret = config_writer_close_element(writer); | |
1390 | if (ret) { | |
1391 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1392 | goto end; | |
1393 | } | |
1394 | ||
1395 | /* /pid_tracker */ | |
1396 | ret = config_writer_close_element(writer); | |
1397 | if (ret) { | |
1398 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1399 | goto end; | |
1400 | } | |
1401 | } | |
1402 | end: | |
1403 | free(pids); | |
1404 | return ret; | |
1405 | } | |
1406 | ||
51755dc8 JG |
1407 | static |
1408 | int save_ust_domain(struct config_writer *writer, | |
1409 | struct ltt_session *session, enum lttng_domain_type domain) | |
fb198a11 JG |
1410 | { |
1411 | int ret; | |
1412 | struct ltt_ust_channel *ust_chan; | |
1413 | const char *buffer_type_string; | |
1414 | struct lttng_ht_node_str *node; | |
1415 | struct lttng_ht_iter iter; | |
51755dc8 | 1416 | const char *config_domain_name; |
fb198a11 JG |
1417 | |
1418 | assert(writer); | |
1419 | assert(session); | |
1420 | ||
51755dc8 JG |
1421 | ret = config_writer_open_element(writer, |
1422 | config_element_domain); | |
1423 | if (ret) { | |
1424 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1425 | goto end; | |
1426 | } | |
1427 | ||
1428 | config_domain_name = get_config_domain_str(domain); | |
1429 | if (!config_domain_name) { | |
1430 | ret = LTTNG_ERR_INVALID; | |
1431 | goto end; | |
1432 | } | |
1433 | ||
1434 | ret = config_writer_write_element_string(writer, | |
1435 | config_element_type, config_domain_name); | |
fb198a11 JG |
1436 | if (ret) { |
1437 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1438 | goto end; | |
1439 | } | |
1440 | ||
1441 | buffer_type_string = get_buffer_type_string( | |
1442 | session->ust_session->buffer_type); | |
1443 | if (!buffer_type_string) { | |
1444 | ERR("Unsupported buffer type."); | |
1445 | ret = LTTNG_ERR_INVALID; | |
1446 | goto end; | |
1447 | } | |
1448 | ||
1449 | ret = config_writer_write_element_string(writer, | |
1450 | config_element_buffer_type, buffer_type_string); | |
1451 | if (ret) { | |
1452 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1453 | goto end; | |
1454 | } | |
1455 | ||
1456 | ret = config_writer_open_element(writer, config_element_channels); | |
1457 | if (ret) { | |
1458 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1459 | goto end; | |
1460 | } | |
1461 | ||
1462 | rcu_read_lock(); | |
1463 | cds_lfht_for_each_entry(session->ust_session->domain_global.channels->ht, | |
1464 | &iter.iter, node, node) { | |
fb198a11 | 1465 | ust_chan = caa_container_of(node, struct ltt_ust_channel, node); |
51755dc8 | 1466 | if (domain == ust_chan->domain) { |
fb198a11 JG |
1467 | ret = save_ust_channel(writer, ust_chan, session->ust_session); |
1468 | if (ret) { | |
1469 | rcu_read_unlock(); | |
1470 | goto end; | |
1471 | } | |
1472 | } | |
1473 | } | |
1474 | rcu_read_unlock(); | |
1475 | ||
1476 | /* /channels */ | |
1477 | ret = config_writer_close_element(writer); | |
1478 | if (ret) { | |
1479 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1480 | goto end; | |
1481 | } | |
51755dc8 | 1482 | |
e8fcabef | 1483 | if (domain == LTTNG_DOMAIN_UST) { |
847a5916 | 1484 | ret = config_writer_open_element(writer, |
e8fcabef | 1485 | config_element_trackers); |
847a5916 JR |
1486 | if (ret) { |
1487 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1488 | goto end; | |
1489 | } | |
1490 | ||
e8fcabef | 1491 | ret = save_pid_tracker(writer, session, LTTNG_DOMAIN_UST); |
847a5916 | 1492 | if (ret) { |
847a5916 JR |
1493 | goto end; |
1494 | } | |
1495 | ||
e8fcabef | 1496 | /* /trackers */ |
847a5916 JR |
1497 | ret = config_writer_close_element(writer); |
1498 | if (ret) { | |
847a5916 JR |
1499 | goto end; |
1500 | } | |
e8fcabef | 1501 | } |
847a5916 | 1502 | |
e8fcabef JG |
1503 | /* /domain */ |
1504 | ret = config_writer_close_element(writer); | |
1505 | if (ret) { | |
1506 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1507 | goto end; | |
847a5916 | 1508 | } |
e8fcabef | 1509 | |
847a5916 | 1510 | end: |
847a5916 JR |
1511 | return ret; |
1512 | } | |
1513 | ||
fb198a11 JG |
1514 | static |
1515 | int save_domains(struct config_writer *writer, struct ltt_session *session) | |
1516 | { | |
1517 | int ret = 0; | |
1518 | ||
1519 | assert(writer); | |
1520 | assert(session); | |
1521 | ||
1522 | if (!session->kernel_session && !session->ust_session) { | |
1523 | goto end; | |
1524 | } | |
1525 | ||
1526 | ret = config_writer_open_element(writer, config_element_domains); | |
1527 | if (ret) { | |
1528 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1529 | goto end; | |
1530 | } | |
1531 | ||
1532 | ||
1533 | if (session->kernel_session) { | |
1534 | ret = config_writer_open_element(writer, | |
1535 | config_element_domain); | |
1536 | if (ret) { | |
1537 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1538 | goto end; | |
1539 | } | |
1540 | ||
1541 | ret = save_kernel_session(writer, session); | |
1542 | if (ret) { | |
1543 | goto end; | |
1544 | } | |
1545 | ||
847a5916 JR |
1546 | ret = config_writer_open_element(writer, |
1547 | config_element_trackers); | |
1548 | if (ret) { | |
1549 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1550 | goto end; | |
1551 | } | |
1552 | ||
1553 | ret = save_pid_tracker(writer, session, LTTNG_DOMAIN_KERNEL); | |
1554 | if (ret) { | |
1555 | goto end; | |
1556 | } | |
1557 | ||
1558 | /* /trackers */ | |
1559 | ret = config_writer_close_element(writer); | |
1560 | if (ret) { | |
1561 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1562 | goto end; | |
1563 | } | |
fb198a11 JG |
1564 | /* /domain */ |
1565 | ret = config_writer_close_element(writer); | |
1566 | if (ret) { | |
1567 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1568 | goto end; | |
1569 | } | |
1570 | } | |
1571 | ||
1572 | if (session->ust_session) { | |
51755dc8 | 1573 | ret = save_ust_domain(writer, session, LTTNG_DOMAIN_UST); |
fb198a11 JG |
1574 | if (ret) { |
1575 | goto end; | |
1576 | } | |
1577 | ||
51755dc8 | 1578 | ret = save_ust_domain(writer, session, LTTNG_DOMAIN_JUL); |
fb198a11 | 1579 | if (ret) { |
fb198a11 JG |
1580 | goto end; |
1581 | } | |
fb198a11 | 1582 | |
51755dc8 JG |
1583 | ret = save_ust_domain(writer, session, LTTNG_DOMAIN_LOG4J); |
1584 | if (ret) { | |
1585 | goto end; | |
1586 | } | |
65d72c41 | 1587 | |
51755dc8 JG |
1588 | ret = save_ust_domain(writer, session, LTTNG_DOMAIN_PYTHON); |
1589 | if (ret) { | |
1590 | goto end; | |
fb198a11 JG |
1591 | } |
1592 | } | |
1593 | ||
1594 | /* /domains */ | |
1595 | ret = config_writer_close_element(writer); | |
1596 | if (ret) { | |
1597 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1598 | goto end; | |
1599 | } | |
1600 | end: | |
1601 | return ret; | |
1602 | } | |
1603 | ||
1604 | static | |
1605 | int save_consumer_output(struct config_writer *writer, | |
1606 | struct consumer_output *output) | |
1607 | { | |
1608 | int ret; | |
1609 | ||
1610 | assert(writer); | |
1611 | assert(output); | |
1612 | ||
1613 | ret = config_writer_open_element(writer, config_element_consumer_output); | |
1614 | if (ret) { | |
1615 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1616 | goto end; | |
1617 | } | |
1618 | ||
1619 | ret = config_writer_write_element_bool(writer, config_element_enabled, | |
1620 | output->enabled); | |
1621 | if (ret) { | |
1622 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1623 | goto end; | |
1624 | } | |
1625 | ||
1626 | ret = config_writer_open_element(writer, config_element_destination); | |
1627 | if (ret) { | |
1628 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1629 | goto end; | |
1630 | } | |
1631 | ||
1632 | switch (output->type) { | |
1633 | case CONSUMER_DST_LOCAL: | |
1634 | ret = config_writer_write_element_string(writer, | |
1635 | config_element_path, output->dst.trace_path); | |
1636 | if (ret) { | |
1637 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1638 | goto end; | |
1639 | } | |
1640 | break; | |
1641 | case CONSUMER_DST_NET: | |
1642 | { | |
1643 | char *uri; | |
1644 | ||
1645 | uri = zmalloc(PATH_MAX); | |
1646 | if (!uri) { | |
1647 | ret = LTTNG_ERR_NOMEM; | |
1648 | goto end; | |
1649 | } | |
1650 | ||
1651 | ret = config_writer_open_element(writer, config_element_net_output); | |
1652 | if (ret) { | |
1653 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1654 | goto end_net_output; | |
1655 | } | |
1656 | ||
1657 | if (output->dst.net.control_isset && | |
1658 | output->dst.net.data_isset) { | |
1659 | ret = uri_to_str_url(&output->dst.net.control, uri, PATH_MAX); | |
1660 | if (ret < 0) { | |
1661 | ret = LTTNG_ERR_INVALID; | |
1662 | goto end_net_output; | |
1663 | } | |
1664 | ||
1665 | ret = config_writer_write_element_string(writer, | |
1666 | config_element_control_uri, uri); | |
1667 | if (ret) { | |
1668 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1669 | goto end_net_output; | |
1670 | } | |
1671 | ||
1672 | ret = uri_to_str_url(&output->dst.net.data, uri, PATH_MAX); | |
1673 | if (ret < 0) { | |
1674 | ret = LTTNG_ERR_INVALID; | |
1675 | goto end_net_output; | |
1676 | } | |
1677 | ||
1678 | ret = config_writer_write_element_string(writer, | |
1679 | config_element_data_uri, uri); | |
1680 | if (ret) { | |
1681 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1682 | goto end_net_output; | |
1683 | } | |
1684 | ||
1685 | end_net_output: | |
1686 | free(uri); | |
1687 | if (ret) { | |
1688 | goto end; | |
1689 | } | |
1690 | } else { | |
1691 | ret = !output->dst.net.control_isset ? | |
1692 | LTTNG_ERR_URL_CTRL_MISS : | |
1693 | LTTNG_ERR_URL_DATA_MISS; | |
c39270e5 | 1694 | free(uri); |
fb198a11 JG |
1695 | goto end; |
1696 | } | |
1697 | ||
1698 | ret = config_writer_close_element(writer); | |
1699 | if (ret) { | |
1700 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1701 | goto end; | |
1702 | } | |
1703 | break; | |
1704 | } | |
1705 | default: | |
1706 | ERR("Unsupported consumer output type."); | |
1707 | ret = LTTNG_ERR_INVALID; | |
1708 | goto end; | |
1709 | } | |
1710 | ||
1711 | /* /destination */ | |
1712 | ret = config_writer_close_element(writer); | |
1713 | if (ret) { | |
1714 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1715 | goto end; | |
1716 | } | |
1717 | ||
1718 | /* /consumer_output */ | |
1719 | ret = config_writer_close_element(writer); | |
1720 | if (ret) { | |
1721 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1722 | goto end; | |
1723 | } | |
1724 | end: | |
1725 | return ret; | |
1726 | } | |
1727 | ||
1728 | static | |
1729 | int save_snapshot_outputs(struct config_writer *writer, | |
1730 | struct snapshot *snapshot) | |
1731 | { | |
1732 | int ret; | |
1733 | struct lttng_ht_iter iter; | |
1734 | struct snapshot_output *output; | |
1735 | ||
1736 | assert(writer); | |
1737 | assert(snapshot); | |
1738 | ||
1739 | ret = config_writer_open_element(writer, config_element_snapshot_outputs); | |
1740 | if (ret) { | |
1741 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1742 | goto end; | |
1743 | } | |
1744 | ||
1745 | rcu_read_lock(); | |
1746 | cds_lfht_for_each_entry(snapshot->output_ht->ht, &iter.iter, output, | |
1747 | node.node) { | |
1748 | ret = config_writer_open_element(writer, | |
1749 | config_element_output); | |
1750 | if (ret) { | |
1751 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1752 | goto end_unlock; | |
1753 | } | |
1754 | ||
1755 | ret = config_writer_write_element_string(writer, | |
1756 | config_element_name, output->name); | |
1757 | if (ret) { | |
1758 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1759 | goto end_unlock; | |
1760 | } | |
1761 | ||
1762 | ret = config_writer_write_element_unsigned_int(writer, | |
1763 | config_element_max_size, output->max_size); | |
1764 | if (ret) { | |
1765 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1766 | goto end_unlock; | |
1767 | } | |
1768 | ||
1769 | ret = save_consumer_output(writer, output->consumer); | |
1770 | if (ret) { | |
1771 | goto end_unlock; | |
1772 | } | |
1773 | ||
1774 | /* /output */ | |
1775 | ret = config_writer_close_element(writer); | |
1776 | if (ret) { | |
1777 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1778 | goto end_unlock; | |
1779 | } | |
1780 | } | |
1781 | rcu_read_unlock(); | |
1782 | ||
1783 | /* /snapshot_outputs */ | |
1784 | ret = config_writer_close_element(writer); | |
1785 | if (ret) { | |
1786 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1787 | goto end; | |
1788 | } | |
1789 | ||
1790 | end: | |
1791 | return ret; | |
1792 | end_unlock: | |
1793 | rcu_read_unlock(); | |
1794 | return ret; | |
1795 | } | |
1796 | ||
1797 | static | |
1798 | int save_session_output(struct config_writer *writer, | |
1799 | struct ltt_session *session) | |
1800 | { | |
1801 | int ret; | |
1802 | ||
1803 | assert(writer); | |
1804 | assert(session); | |
1805 | ||
1806 | if ((session->snapshot_mode && session->snapshot.nb_output == 0) || | |
1807 | (!session->snapshot_mode && !session->consumer)) { | |
1808 | /* Session is in no output mode */ | |
1809 | ret = 0; | |
1810 | goto end; | |
1811 | } | |
1812 | ||
1813 | ret = config_writer_open_element(writer, config_element_output); | |
1814 | if (ret) { | |
1815 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1816 | goto end; | |
1817 | } | |
1818 | ||
1819 | if (session->snapshot_mode) { | |
1820 | ret = save_snapshot_outputs(writer, &session->snapshot); | |
1821 | if (ret) { | |
1822 | goto end; | |
1823 | } | |
1824 | } else { | |
1825 | if (session->consumer) { | |
1826 | ret = save_consumer_output(writer, session->consumer); | |
1827 | if (ret) { | |
1828 | goto end; | |
1829 | } | |
1830 | } | |
1831 | } | |
1832 | ||
1833 | /* /output */ | |
1834 | ret = config_writer_close_element(writer); | |
1835 | if (ret) { | |
1836 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1837 | goto end; | |
1838 | } | |
1839 | end: | |
1840 | return ret; | |
1841 | } | |
1842 | ||
1843 | /* | |
1844 | * Save the given session. | |
1845 | * | |
1846 | * Return 0 on success else a LTTNG_ERR* code. | |
1847 | */ | |
1848 | static | |
1849 | int save_session(struct ltt_session *session, | |
1850 | struct lttng_save_session_attr *attr, lttng_sock_cred *creds) | |
1851 | { | |
1852 | int ret, fd; | |
db471218 | 1853 | unsigned int file_opened = 0; /* Indicate if the file has been opened */ |
fb198a11 JG |
1854 | char config_file_path[PATH_MAX]; |
1855 | size_t len; | |
1856 | struct config_writer *writer = NULL; | |
1857 | size_t session_name_len; | |
1858 | const char *provided_path; | |
1859 | ||
1860 | assert(session); | |
1861 | assert(attr); | |
1862 | assert(creds); | |
1863 | ||
1864 | session_name_len = strlen(session->name); | |
95a29ab8 | 1865 | memset(config_file_path, 0, sizeof(config_file_path)); |
fb198a11 JG |
1866 | |
1867 | if (!session_access_ok(session, | |
1868 | LTTNG_SOCK_GET_UID_CRED(creds), | |
1869 | LTTNG_SOCK_GET_GID_CRED(creds))) { | |
1870 | ret = LTTNG_ERR_EPERM; | |
1871 | goto end; | |
1872 | } | |
1873 | ||
1874 | provided_path = lttng_save_session_attr_get_output_url(attr); | |
1875 | if (provided_path) { | |
95a29ab8 | 1876 | DBG3("Save session in provided path %s", provided_path); |
fb198a11 | 1877 | len = strlen(provided_path); |
d2992717 | 1878 | if (len >= sizeof(config_file_path)) { |
fb198a11 JG |
1879 | ret = LTTNG_ERR_SET_URL; |
1880 | goto end; | |
1881 | } | |
1882 | strncpy(config_file_path, provided_path, len); | |
1883 | } else { | |
7e078ad1 | 1884 | ssize_t ret_len; |
fb198a11 JG |
1885 | char *home_dir = utils_get_user_home_dir( |
1886 | LTTNG_SOCK_GET_UID_CRED(creds)); | |
1887 | if (!home_dir) { | |
1888 | ret = LTTNG_ERR_SET_URL; | |
1889 | goto end; | |
1890 | } | |
1891 | ||
d2992717 | 1892 | ret_len = snprintf(config_file_path, sizeof(config_file_path), |
fb198a11 JG |
1893 | DEFAULT_SESSION_HOME_CONFIGPATH, home_dir); |
1894 | free(home_dir); | |
7e078ad1 | 1895 | if (ret_len < 0) { |
fb198a11 JG |
1896 | PERROR("snprintf save session"); |
1897 | ret = LTTNG_ERR_SET_URL; | |
1898 | goto end; | |
1899 | } | |
7e078ad1 | 1900 | len = ret_len; |
fb198a11 JG |
1901 | } |
1902 | ||
1903 | /* | |
d2992717 DG |
1904 | * Check the path fits in the config file path dst including the '/' |
1905 | * followed by trailing .lttng extension and the NULL terminated string. | |
fb198a11 | 1906 | */ |
d2992717 DG |
1907 | if ((len + session_name_len + 2 + |
1908 | sizeof(DEFAULT_SESSION_CONFIG_FILE_EXTENSION)) | |
1909 | > sizeof(config_file_path)) { | |
fb198a11 JG |
1910 | ret = LTTNG_ERR_SET_URL; |
1911 | goto end; | |
1912 | } | |
1913 | ||
1914 | ret = run_as_mkdir_recursive(config_file_path, S_IRWXU | S_IRWXG, | |
1915 | LTTNG_SOCK_GET_UID_CRED(creds), LTTNG_SOCK_GET_GID_CRED(creds)); | |
1916 | if (ret) { | |
1917 | ret = LTTNG_ERR_SET_URL; | |
1918 | goto end; | |
1919 | } | |
1920 | ||
d2992717 DG |
1921 | /* |
1922 | * At this point, we know that everything fits in the buffer. Validation | |
1923 | * was done just above. | |
1924 | */ | |
fb198a11 JG |
1925 | config_file_path[len++] = '/'; |
1926 | strncpy(config_file_path + len, session->name, session_name_len); | |
1927 | len += session_name_len; | |
1928 | strcpy(config_file_path + len, DEFAULT_SESSION_CONFIG_FILE_EXTENSION); | |
95a29ab8 DG |
1929 | len += sizeof(DEFAULT_SESSION_CONFIG_FILE_EXTENSION); |
1930 | config_file_path[len] = '\0'; | |
fb198a11 JG |
1931 | |
1932 | if (!access(config_file_path, F_OK) && !attr->overwrite) { | |
f9b57ab2 DG |
1933 | /* File exists, notify the user since the overwrite flag is off. */ |
1934 | ret = LTTNG_ERR_SAVE_FILE_EXIST; | |
fb198a11 JG |
1935 | goto end; |
1936 | } | |
1937 | ||
1938 | fd = run_as_open(config_file_path, O_CREAT | O_WRONLY | O_TRUNC, | |
1939 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP, | |
1940 | LTTNG_SOCK_GET_UID_CRED(creds), LTTNG_SOCK_GET_GID_CRED(creds)); | |
1941 | if (fd < 0) { | |
1942 | PERROR("Could not create configuration file"); | |
1943 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1944 | goto end; | |
1945 | } | |
db471218 | 1946 | file_opened = 1; |
fb198a11 | 1947 | |
705bb62f | 1948 | writer = config_writer_create(fd, 1); |
fb198a11 JG |
1949 | if (!writer) { |
1950 | ret = LTTNG_ERR_NOMEM; | |
1951 | goto end; | |
1952 | } | |
1953 | ||
1954 | ret = config_writer_open_element(writer, config_element_sessions); | |
1955 | if (ret) { | |
1956 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1957 | goto end; | |
1958 | } | |
1959 | ||
1960 | ret = config_writer_open_element(writer, config_element_session); | |
1961 | if (ret) { | |
1962 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1963 | goto end; | |
1964 | } | |
1965 | ||
1966 | ret = config_writer_write_element_string(writer, config_element_name, | |
1967 | session->name); | |
1968 | if (ret) { | |
1969 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1970 | goto end; | |
1971 | } | |
1972 | ||
9e7c9f56 JR |
1973 | if(session->shm_path[0] != '\0') { |
1974 | ret = config_writer_write_element_string(writer, | |
1975 | config_element_shared_memory_path, | |
1976 | session->shm_path); | |
1977 | if (ret) { | |
1978 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1979 | goto end; | |
1980 | } | |
1981 | } | |
1982 | ||
fb198a11 JG |
1983 | ret = save_domains(writer, session); |
1984 | if (ret) { | |
1985 | goto end; | |
1986 | } | |
1987 | ||
1988 | ret = config_writer_write_element_bool(writer, config_element_started, | |
8382cf6f | 1989 | session->active); |
fb198a11 JG |
1990 | if (ret) { |
1991 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1992 | goto end; | |
1993 | } | |
1994 | ||
1995 | if (session->snapshot_mode || session->live_timer) { | |
1996 | ret = config_writer_open_element(writer, config_element_attributes); | |
1997 | if (ret) { | |
1998 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1999 | goto end; | |
2000 | } | |
2001 | ||
2002 | if (session->snapshot_mode) { | |
2003 | ret = config_writer_write_element_bool(writer, | |
2004 | config_element_snapshot_mode, 1); | |
2005 | if (ret) { | |
2006 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2007 | goto end; | |
2008 | } | |
2009 | } else { | |
d98ad589 | 2010 | ret = config_writer_write_element_unsigned_int(writer, |
fb198a11 JG |
2011 | config_element_live_timer_interval, session->live_timer); |
2012 | if (ret) { | |
2013 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2014 | goto end; | |
2015 | } | |
2016 | } | |
2017 | ||
2018 | /* /attributes */ | |
2019 | ret = config_writer_close_element(writer); | |
2020 | if (ret) { | |
2021 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2022 | goto end; | |
2023 | } | |
2024 | } | |
2025 | ||
2026 | ret = save_session_output(writer, session); | |
2027 | if (ret) { | |
2028 | goto end; | |
2029 | } | |
2030 | ||
2031 | /* /session */ | |
2032 | ret = config_writer_close_element(writer); | |
2033 | if (ret) { | |
2034 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2035 | goto end; | |
2036 | } | |
2037 | ||
2038 | /* /sessions */ | |
2039 | ret = config_writer_close_element(writer); | |
2040 | if (ret) { | |
2041 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2042 | goto end; | |
2043 | } | |
2044 | end: | |
2045 | if (writer && config_writer_destroy(writer)) { | |
2046 | /* Preserve the original error code */ | |
2047 | ret = ret ? ret : LTTNG_ERR_SAVE_IO_FAIL; | |
2048 | } | |
2049 | if (ret) { | |
2050 | /* Delete file in case of error */ | |
db471218 | 2051 | if (file_opened && unlink(config_file_path)) { |
fb198a11 JG |
2052 | PERROR("Unlinking XML session configuration."); |
2053 | } | |
2054 | } | |
2055 | ||
2056 | return ret; | |
2057 | } | |
2058 | ||
2059 | int cmd_save_sessions(struct lttng_save_session_attr *attr, | |
2060 | lttng_sock_cred *creds) | |
2061 | { | |
2062 | int ret; | |
2063 | const char *session_name; | |
2064 | struct ltt_session *session; | |
2065 | ||
2066 | session_lock_list(); | |
2067 | ||
2068 | session_name = lttng_save_session_attr_get_session_name(attr); | |
2069 | if (session_name) { | |
2070 | session = session_find_by_name(session_name); | |
2071 | if (!session) { | |
2072 | ret = LTTNG_ERR_SESS_NOT_FOUND; | |
2073 | goto end; | |
2074 | } | |
2075 | ||
2076 | session_lock(session); | |
2077 | ret = save_session(session, attr, creds); | |
2078 | session_unlock(session); | |
2079 | if (ret) { | |
2080 | goto end; | |
2081 | } | |
2082 | } else { | |
2083 | struct ltt_session_list *list = session_get_list(); | |
2084 | ||
2085 | cds_list_for_each_entry(session, &list->head, list) { | |
2086 | session_lock(session); | |
2087 | ret = save_session(session, attr, creds); | |
2088 | session_unlock(session); | |
2089 | ||
2090 | /* Don't abort if we don't have the required permissions. */ | |
2091 | if (ret && ret != LTTNG_ERR_EPERM) { | |
2092 | goto end; | |
2093 | } | |
2094 | } | |
2095 | } | |
2096 | ret = LTTNG_OK; | |
2097 | ||
2098 | end: | |
2099 | session_unlock_list(); | |
2100 | return ret; | |
2101 | } |