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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; | |
711 | strncpy(ust_event->attr.name, agent_event->name, LTTNG_SYMBOL_NAME_LEN); | |
0b35b846 JG |
712 | switch (agent_event->loglevel_type) { |
713 | case LTTNG_EVENT_LOGLEVEL_ALL: | |
714 | ust_loglevel_type = LTTNG_UST_LOGLEVEL_ALL; | |
715 | break; | |
716 | case LTTNG_EVENT_LOGLEVEL_SINGLE: | |
717 | ust_loglevel_type = LTTNG_UST_LOGLEVEL_SINGLE; | |
718 | break; | |
719 | case LTTNG_EVENT_LOGLEVEL_RANGE: | |
720 | ust_loglevel_type = LTTNG_UST_LOGLEVEL_RANGE; | |
721 | break; | |
722 | default: | |
723 | ERR("Invalid agent_event loglevel_type."); | |
724 | ret = -1; | |
725 | goto end; | |
726 | } | |
727 | ||
728 | ust_event->attr.loglevel_type = ust_loglevel_type; | |
2106efa0 | 729 | ust_event->attr.loglevel = agent_event->loglevel_value; |
51755dc8 JG |
730 | ust_event->filter_expression = agent_event->filter_expression; |
731 | ust_event->exclusion = agent_event->exclusion; | |
0b35b846 JG |
732 | end: |
733 | return ret; | |
51755dc8 JG |
734 | } |
735 | ||
736 | static | |
737 | int save_agent_events(struct config_writer *writer, | |
738 | struct ltt_ust_channel *chan, | |
739 | struct agent *agent) | |
740 | { | |
741 | int ret; | |
742 | struct lttng_ht_iter iter; | |
743 | struct lttng_ht_node_str *node; | |
744 | ||
745 | ret = config_writer_open_element(writer, config_element_events); | |
746 | if (ret) { | |
747 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
748 | goto end; | |
749 | } | |
750 | ||
751 | rcu_read_lock(); | |
752 | cds_lfht_for_each_entry(agent->events->ht, &iter.iter, node, node) { | |
753 | int ret; | |
754 | struct agent_event *agent_event; | |
755 | struct ltt_ust_event fake_event; | |
756 | ||
757 | memset(&fake_event, 0, sizeof(fake_event)); | |
758 | agent_event = caa_container_of(node, struct agent_event, node); | |
759 | ||
760 | /* | |
761 | * Initialize a fake ust event to reuse the same serialization | |
762 | * function since UST and agent events contain the same info | |
763 | * (and one could wonder why they don't reuse the same | |
764 | * structures...). | |
765 | */ | |
0b35b846 JG |
766 | ret = init_ust_event_from_agent_event(&fake_event, agent_event); |
767 | if (ret) { | |
768 | rcu_read_unlock(); | |
769 | goto end; | |
770 | } | |
51755dc8 JG |
771 | ret = save_ust_event(writer, &fake_event); |
772 | if (ret) { | |
773 | rcu_read_unlock(); | |
774 | goto end; | |
775 | } | |
776 | } | |
777 | rcu_read_unlock(); | |
778 | ||
779 | /* /events */ | |
780 | ret = config_writer_close_element(writer); | |
781 | if (ret) { | |
782 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
783 | goto end; | |
784 | } | |
785 | end: | |
786 | return ret; | |
787 | } | |
788 | ||
fb198a11 JG |
789 | static |
790 | int save_kernel_context(struct config_writer *writer, | |
791 | struct lttng_kernel_context *ctx) | |
792 | { | |
793 | int ret = 0; | |
794 | ||
795 | if (!ctx) { | |
796 | goto end; | |
797 | } | |
798 | ||
fb198a11 JG |
799 | ret = config_writer_open_element(writer, config_element_context); |
800 | if (ret) { | |
801 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
802 | goto end; | |
803 | } | |
804 | ||
cba45eda | 805 | if (ctx->ctx == LTTNG_KERNEL_CONTEXT_PERF_CPU_COUNTER) { |
045fc617 JG |
806 | ret = config_writer_open_element(writer, |
807 | config_element_context_perf); | |
fb198a11 JG |
808 | if (ret) { |
809 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
810 | goto end; | |
811 | } | |
812 | ||
813 | ret = config_writer_write_element_unsigned_int(writer, | |
814 | config_element_type, ctx->u.perf_counter.type); | |
815 | if (ret) { | |
816 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
817 | goto end; | |
818 | } | |
819 | ||
820 | ret = config_writer_write_element_unsigned_int(writer, | |
821 | config_element_config, ctx->u.perf_counter.config); | |
822 | if (ret) { | |
823 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
824 | goto end; | |
825 | } | |
826 | ||
827 | ret = config_writer_write_element_string(writer, | |
828 | config_element_name, ctx->u.perf_counter.name); | |
829 | if (ret) { | |
830 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
831 | goto end; | |
832 | } | |
833 | ||
834 | /* /perf */ | |
835 | ret = config_writer_close_element(writer); | |
836 | if (ret) { | |
837 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
838 | goto end; | |
839 | } | |
840 | } else { | |
841 | const char *context_type_string = | |
842 | get_kernel_context_type_string(ctx->ctx); | |
843 | ||
844 | if (!context_type_string) { | |
845 | ERR("Unsupported kernel context type."); | |
846 | ret = LTTNG_ERR_INVALID; | |
847 | goto end; | |
848 | } | |
849 | ||
850 | ret = config_writer_write_element_string(writer, | |
851 | config_element_type, context_type_string); | |
852 | if (ret) { | |
853 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
854 | goto end; | |
855 | } | |
856 | } | |
857 | ||
858 | /* /context */ | |
859 | ret = config_writer_close_element(writer); | |
860 | if (ret) { | |
861 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
862 | goto end; | |
863 | } | |
864 | ||
645328ae DG |
865 | end: |
866 | return ret; | |
867 | } | |
868 | ||
869 | static | |
870 | int save_kernel_contexts(struct config_writer *writer, | |
871 | struct ltt_kernel_channel *kchan) | |
872 | { | |
873 | int ret; | |
874 | struct ltt_kernel_context *ctx; | |
875 | ||
2aa64052 JG |
876 | if (cds_list_empty(&kchan->ctx_list)) { |
877 | ret = 0; | |
878 | goto end; | |
879 | } | |
880 | ||
645328ae DG |
881 | ret = config_writer_open_element(writer, config_element_contexts); |
882 | if (ret) { | |
883 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
884 | goto end; | |
885 | } | |
886 | ||
887 | cds_list_for_each_entry(ctx, &kchan->ctx_list, list) { | |
888 | ret = save_kernel_context(writer, &ctx->ctx); | |
889 | if (ret) { | |
890 | goto end; | |
891 | } | |
892 | } | |
893 | ||
fb198a11 JG |
894 | /* /contexts */ |
895 | ret = config_writer_close_element(writer); | |
896 | if (ret) { | |
897 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
898 | goto end; | |
899 | } | |
900 | end: | |
901 | return ret; | |
902 | } | |
903 | ||
045fc617 JG |
904 | static |
905 | int save_ust_context_perf_thread_counter(struct config_writer *writer, | |
906 | struct ltt_ust_context *ctx) | |
907 | { | |
908 | int ret; | |
909 | ||
910 | assert(writer); | |
911 | assert(ctx); | |
912 | ||
913 | /* Perf contexts are saved as event_perf_context_type */ | |
914 | ret = config_writer_open_element(writer, config_element_context_perf); | |
915 | if (ret) { | |
916 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
917 | goto end; | |
918 | } | |
919 | ||
920 | ret = config_writer_write_element_unsigned_int(writer, | |
921 | config_element_type, ctx->ctx.u.perf_counter.type); | |
922 | if (ret) { | |
923 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
924 | goto end; | |
925 | } | |
926 | ||
927 | ret = config_writer_write_element_unsigned_int(writer, | |
928 | config_element_config, ctx->ctx.u.perf_counter.config); | |
929 | if (ret) { | |
930 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
931 | goto end; | |
932 | } | |
933 | ||
934 | ret = config_writer_write_element_string(writer, config_element_name, | |
935 | ctx->ctx.u.perf_counter.name); | |
936 | if (ret) { | |
937 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
938 | goto end; | |
939 | } | |
940 | ||
941 | /* /perf */ | |
942 | ret = config_writer_close_element(writer); | |
943 | if (ret) { | |
944 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
945 | goto end; | |
946 | } | |
947 | end: | |
948 | return ret; | |
949 | } | |
950 | ||
951 | static | |
952 | int save_ust_context_app_ctx(struct config_writer *writer, | |
953 | struct ltt_ust_context *ctx) | |
954 | { | |
955 | int ret; | |
956 | ||
957 | assert(writer); | |
958 | assert(ctx); | |
959 | ||
960 | /* Application contexts are saved as application_context_type */ | |
961 | ret = config_writer_open_element(writer, config_element_context_app); | |
962 | if (ret) { | |
963 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
964 | goto end; | |
965 | } | |
966 | ||
967 | ret = config_writer_write_element_string(writer, | |
968 | config_element_context_app_provider_name, | |
969 | ctx->ctx.u.app_ctx.provider_name); | |
970 | if (ret) { | |
971 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
972 | goto end; | |
973 | } | |
974 | ||
975 | ret = config_writer_write_element_string(writer, | |
976 | config_element_context_app_ctx_name, | |
977 | ctx->ctx.u.app_ctx.ctx_name); | |
978 | if (ret) { | |
979 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
980 | goto end; | |
981 | } | |
982 | ||
983 | /* /app */ | |
984 | ret = config_writer_close_element(writer); | |
985 | if (ret) { | |
986 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
987 | goto end; | |
988 | } | |
989 | end: | |
990 | return ret; | |
991 | } | |
992 | ||
993 | static | |
994 | int save_ust_context_generic(struct config_writer *writer, | |
995 | struct ltt_ust_context *ctx) | |
996 | { | |
997 | int ret; | |
998 | const char *context_type_string; | |
999 | ||
1000 | assert(writer); | |
1001 | assert(ctx); | |
1002 | ||
1003 | /* Save context as event_context_type_type */ | |
1004 | context_type_string = get_ust_context_type_string( | |
1005 | ctx->ctx.ctx); | |
1006 | if (!context_type_string) { | |
1007 | ERR("Unsupported UST context type."); | |
1008 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1009 | goto end; | |
1010 | } | |
1011 | ||
1012 | ret = config_writer_write_element_string(writer, | |
1013 | config_element_type, context_type_string); | |
1014 | if (ret) { | |
1015 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1016 | goto end; | |
1017 | } | |
1018 | end: | |
1019 | return ret; | |
1020 | } | |
1021 | ||
fb198a11 JG |
1022 | static |
1023 | int save_ust_context(struct config_writer *writer, | |
1024 | struct cds_list_head *ctx_list) | |
1025 | { | |
1026 | int ret; | |
1027 | struct ltt_ust_context *ctx; | |
1028 | ||
1029 | assert(writer); | |
1030 | assert(ctx_list); | |
1031 | ||
1032 | ret = config_writer_open_element(writer, config_element_contexts); | |
1033 | if (ret) { | |
1034 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1035 | goto end; | |
1036 | } | |
1037 | ||
1038 | cds_list_for_each_entry(ctx, ctx_list, list) { | |
fb198a11 JG |
1039 | ret = config_writer_open_element(writer, |
1040 | config_element_context); | |
1041 | if (ret) { | |
1042 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1043 | goto end; | |
1044 | } | |
1045 | ||
045fc617 JG |
1046 | switch (ctx->ctx.ctx) { |
1047 | case LTTNG_UST_CONTEXT_PERF_THREAD_COUNTER: | |
1048 | ret = save_ust_context_perf_thread_counter(writer, ctx); | |
1049 | break; | |
1050 | case LTTNG_UST_CONTEXT_APP_CONTEXT: | |
1051 | ret = save_ust_context_app_ctx(writer, ctx); | |
1052 | break; | |
1053 | default: | |
1054 | /* Save generic context. */ | |
1055 | ret = save_ust_context_generic(writer, ctx); | |
1056 | } | |
1057 | if (ret) { | |
1058 | goto end; | |
fb198a11 JG |
1059 | } |
1060 | ||
1061 | /* /context */ | |
1062 | ret = config_writer_close_element(writer); | |
1063 | if (ret) { | |
1064 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1065 | goto end; | |
1066 | } | |
1067 | } | |
1068 | ||
1069 | /* /contexts */ | |
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_channel(struct config_writer *writer, | |
1081 | struct ltt_kernel_channel *kchan) | |
1082 | { | |
1083 | int ret; | |
1084 | ||
1085 | assert(writer); | |
1086 | assert(kchan); | |
1087 | ||
1088 | ret = config_writer_open_element(writer, config_element_channel); | |
1089 | if (ret) { | |
1090 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1091 | goto end; | |
1092 | } | |
1093 | ||
1094 | ret = config_writer_write_element_string(writer, config_element_name, | |
1095 | kchan->channel->name); | |
1096 | if (ret) { | |
1097 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1098 | goto end; | |
1099 | } | |
1100 | ||
1101 | ret = config_writer_write_element_bool(writer, config_element_enabled, | |
1102 | kchan->channel->enabled); | |
1103 | if (ret) { | |
1104 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1105 | goto end; | |
1106 | } | |
1107 | ||
1108 | ret = save_kernel_channel_attributes(writer, &kchan->channel->attr); | |
1109 | if (ret) { | |
1110 | goto end; | |
1111 | } | |
1112 | ||
0de3eda1 | 1113 | ret = save_kernel_events(writer, kchan); |
fb198a11 JG |
1114 | if (ret) { |
1115 | goto end; | |
1116 | } | |
1117 | ||
645328ae | 1118 | ret = save_kernel_contexts(writer, kchan); |
fb198a11 JG |
1119 | if (ret) { |
1120 | goto end; | |
1121 | } | |
1122 | ||
1123 | /* /channel */ | |
1124 | ret = config_writer_close_element(writer); | |
1125 | if (ret) { | |
1126 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1127 | goto end; | |
1128 | } | |
1129 | end: | |
1130 | return ret; | |
1131 | } | |
1132 | ||
1133 | static | |
1134 | int save_ust_channel(struct config_writer *writer, | |
1135 | struct ltt_ust_channel *ust_chan, | |
1136 | struct ltt_ust_session *session) | |
1137 | { | |
1138 | int ret; | |
1139 | ||
1140 | assert(writer); | |
1141 | assert(ust_chan); | |
1142 | assert(session); | |
1143 | ||
1144 | ret = config_writer_open_element(writer, config_element_channel); | |
1145 | if (ret) { | |
1146 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1147 | goto end; | |
1148 | } | |
1149 | ||
1150 | ret = config_writer_write_element_string(writer, config_element_name, | |
1151 | ust_chan->name); | |
1152 | if (ret) { | |
1153 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1154 | goto end; | |
1155 | } | |
1156 | ||
1157 | ret = config_writer_write_element_bool(writer, config_element_enabled, | |
1158 | ust_chan->enabled); | |
1159 | if (ret) { | |
1160 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1161 | goto end; | |
1162 | } | |
1163 | ||
1164 | ret = save_ust_channel_attributes(writer, &ust_chan->attr); | |
1165 | if (ret) { | |
1166 | goto end; | |
1167 | } | |
1168 | ||
1169 | ret = config_writer_write_element_unsigned_int(writer, | |
1170 | config_element_tracefile_size, ust_chan->tracefile_size); | |
1171 | if (ret) { | |
1172 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1173 | goto end; | |
1174 | } | |
1175 | ||
1176 | ret = config_writer_write_element_unsigned_int(writer, | |
1177 | config_element_tracefile_count, ust_chan->tracefile_count); | |
1178 | if (ret) { | |
1179 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1180 | goto end; | |
1181 | } | |
1182 | ||
1183 | ret = config_writer_write_element_unsigned_int(writer, | |
1184 | config_element_live_timer_interval, | |
1185 | session->live_timer_interval); | |
1186 | if (ret) { | |
1187 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1188 | goto end; | |
1189 | } | |
1190 | ||
51755dc8 JG |
1191 | if (ust_chan->domain == LTTNG_DOMAIN_UST) { |
1192 | ret = save_ust_events(writer, ust_chan->events); | |
1193 | if (ret) { | |
1194 | goto end; | |
1195 | } | |
1196 | } else { | |
1197 | struct agent *agent = NULL; | |
1198 | ||
1199 | agent = trace_ust_find_agent(session, ust_chan->domain); | |
1200 | if (!agent) { | |
1201 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1202 | ERR("Could not find agent associated to UST subdomain"); | |
1203 | goto end; | |
1204 | } | |
1205 | ||
1206 | /* | |
1207 | * Channels associated with a UST sub-domain (such as JUL, Log4j | |
1208 | * or Python) don't have any non-internal events. We retrieve | |
1209 | * the "agent" events associated with this channel and serialize | |
1210 | * them. | |
1211 | */ | |
1212 | ret = save_agent_events(writer, ust_chan, agent); | |
1213 | if (ret) { | |
1214 | goto end; | |
1215 | } | |
fb198a11 JG |
1216 | } |
1217 | ||
1218 | ret = save_ust_context(writer, &ust_chan->ctx_list); | |
1219 | if (ret) { | |
1220 | goto end; | |
1221 | } | |
1222 | ||
1223 | /* /channel */ | |
1224 | ret = config_writer_close_element(writer); | |
1225 | if (ret) { | |
1226 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1227 | goto end; | |
1228 | } | |
1229 | end: | |
1230 | return ret; | |
1231 | } | |
1232 | ||
1233 | static | |
1234 | int save_kernel_session(struct config_writer *writer, | |
1235 | struct ltt_session *session) | |
1236 | { | |
1237 | int ret; | |
1238 | struct ltt_kernel_channel *kchan; | |
1239 | ||
1240 | assert(writer); | |
1241 | assert(session); | |
1242 | ||
1243 | ret = config_writer_write_element_string(writer, config_element_type, | |
1244 | config_domain_type_kernel); | |
1245 | if (ret) { | |
1246 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1247 | goto end; | |
1248 | } | |
1249 | ||
1250 | ret = config_writer_write_element_string(writer, | |
1251 | config_element_buffer_type, config_buffer_type_global); | |
1252 | if (ret) { | |
1253 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1254 | goto end; | |
1255 | } | |
1256 | ||
1257 | ret = config_writer_open_element(writer, | |
1258 | config_element_channels); | |
1259 | if (ret) { | |
1260 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1261 | goto end; | |
1262 | } | |
1263 | ||
1264 | cds_list_for_each_entry(kchan, &session->kernel_session->channel_list.head, | |
1265 | list) { | |
1266 | ret = save_kernel_channel(writer, kchan); | |
1267 | if (ret) { | |
1268 | goto end; | |
1269 | } | |
1270 | } | |
1271 | ||
1272 | /* /channels */ | |
1273 | ret = config_writer_close_element(writer); | |
1274 | if (ret) { | |
1275 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1276 | goto end; | |
1277 | } | |
1278 | end: | |
1279 | return ret; | |
1280 | } | |
1281 | ||
1282 | static | |
51755dc8 JG |
1283 | const char *get_config_domain_str(enum lttng_domain_type domain) |
1284 | { | |
1285 | const char *str_dom; | |
1286 | ||
1287 | switch (domain) { | |
1288 | case LTTNG_DOMAIN_KERNEL: | |
1289 | str_dom = config_domain_type_kernel; | |
1290 | break; | |
1291 | case LTTNG_DOMAIN_UST: | |
1292 | str_dom = config_domain_type_ust; | |
1293 | break; | |
1294 | case LTTNG_DOMAIN_JUL: | |
1295 | str_dom = config_domain_type_jul; | |
1296 | break; | |
1297 | case LTTNG_DOMAIN_LOG4J: | |
1298 | str_dom = config_domain_type_log4j; | |
1299 | break; | |
1300 | case LTTNG_DOMAIN_PYTHON: | |
1301 | str_dom = config_domain_type_python; | |
1302 | break; | |
1303 | default: | |
1304 | assert(0); | |
1305 | } | |
1306 | ||
1307 | return str_dom; | |
1308 | } | |
1309 | ||
e8fcabef JG |
1310 | static |
1311 | int save_pid_tracker(struct config_writer *writer, | |
1312 | struct ltt_session *sess, int domain) | |
1313 | { | |
1314 | int ret = 0; | |
1315 | ssize_t nr_pids = 0, i; | |
1316 | int32_t *pids = NULL; | |
1317 | ||
1318 | switch (domain) { | |
1319 | case LTTNG_DOMAIN_KERNEL: | |
1320 | { | |
1321 | nr_pids = kernel_list_tracker_pids(sess->kernel_session, &pids); | |
1322 | if (nr_pids < 0) { | |
1323 | ret = LTTNG_ERR_KERN_LIST_FAIL; | |
1324 | goto end; | |
1325 | } | |
1326 | break; | |
1327 | } | |
1328 | case LTTNG_DOMAIN_UST: | |
1329 | { | |
1330 | nr_pids = trace_ust_list_tracker_pids(sess->ust_session, &pids); | |
1331 | if (nr_pids < 0) { | |
1332 | ret = LTTNG_ERR_UST_LIST_FAIL; | |
1333 | goto end; | |
1334 | } | |
1335 | break; | |
1336 | } | |
1337 | case LTTNG_DOMAIN_JUL: | |
1338 | case LTTNG_DOMAIN_LOG4J: | |
1339 | case LTTNG_DOMAIN_PYTHON: | |
1340 | default: | |
1341 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; | |
1342 | goto end; | |
1343 | } | |
1344 | ||
1345 | /* Only create a pid_tracker if enabled or untrack all */ | |
1346 | if (nr_pids != 1 || (nr_pids == 1 && pids[0] != -1)) { | |
1347 | ret = config_writer_open_element(writer, | |
1348 | config_element_pid_tracker); | |
1349 | if (ret) { | |
1350 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1351 | goto end; | |
1352 | } | |
1353 | ||
1354 | ret = config_writer_open_element(writer, | |
1355 | config_element_targets); | |
1356 | if (ret) { | |
1357 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1358 | goto end; | |
1359 | } | |
1360 | ||
1361 | for (i = 0; i < nr_pids; i++) { | |
1362 | ret = config_writer_open_element(writer, | |
1363 | config_element_target_pid); | |
1364 | if (ret) { | |
1365 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1366 | goto end; | |
1367 | } | |
1368 | ||
1369 | ret = config_writer_write_element_unsigned_int(writer, | |
1370 | config_element_pid, pids[i]); | |
1371 | if (ret) { | |
1372 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1373 | goto end; | |
1374 | } | |
1375 | ||
1376 | /* /pid_target */ | |
1377 | ret = config_writer_close_element(writer); | |
1378 | if (ret) { | |
1379 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1380 | goto end; | |
1381 | } | |
1382 | } | |
1383 | ||
1384 | /* /targets */ | |
1385 | ret = config_writer_close_element(writer); | |
1386 | if (ret) { | |
1387 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1388 | goto end; | |
1389 | } | |
1390 | ||
1391 | /* /pid_tracker */ | |
1392 | ret = config_writer_close_element(writer); | |
1393 | if (ret) { | |
1394 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1395 | goto end; | |
1396 | } | |
1397 | } | |
1398 | end: | |
1399 | free(pids); | |
1400 | return ret; | |
1401 | } | |
1402 | ||
51755dc8 JG |
1403 | static |
1404 | int save_ust_domain(struct config_writer *writer, | |
1405 | struct ltt_session *session, enum lttng_domain_type domain) | |
fb198a11 JG |
1406 | { |
1407 | int ret; | |
1408 | struct ltt_ust_channel *ust_chan; | |
1409 | const char *buffer_type_string; | |
1410 | struct lttng_ht_node_str *node; | |
1411 | struct lttng_ht_iter iter; | |
51755dc8 | 1412 | const char *config_domain_name; |
fb198a11 JG |
1413 | |
1414 | assert(writer); | |
1415 | assert(session); | |
1416 | ||
51755dc8 JG |
1417 | ret = config_writer_open_element(writer, |
1418 | config_element_domain); | |
1419 | if (ret) { | |
1420 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1421 | goto end; | |
1422 | } | |
1423 | ||
1424 | config_domain_name = get_config_domain_str(domain); | |
1425 | if (!config_domain_name) { | |
1426 | ret = LTTNG_ERR_INVALID; | |
1427 | goto end; | |
1428 | } | |
1429 | ||
1430 | ret = config_writer_write_element_string(writer, | |
1431 | config_element_type, config_domain_name); | |
fb198a11 JG |
1432 | if (ret) { |
1433 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1434 | goto end; | |
1435 | } | |
1436 | ||
1437 | buffer_type_string = get_buffer_type_string( | |
1438 | session->ust_session->buffer_type); | |
1439 | if (!buffer_type_string) { | |
1440 | ERR("Unsupported buffer type."); | |
1441 | ret = LTTNG_ERR_INVALID; | |
1442 | goto end; | |
1443 | } | |
1444 | ||
1445 | ret = config_writer_write_element_string(writer, | |
1446 | config_element_buffer_type, buffer_type_string); | |
1447 | if (ret) { | |
1448 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1449 | goto end; | |
1450 | } | |
1451 | ||
1452 | ret = config_writer_open_element(writer, config_element_channels); | |
1453 | if (ret) { | |
1454 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1455 | goto end; | |
1456 | } | |
1457 | ||
1458 | rcu_read_lock(); | |
1459 | cds_lfht_for_each_entry(session->ust_session->domain_global.channels->ht, | |
1460 | &iter.iter, node, node) { | |
fb198a11 | 1461 | ust_chan = caa_container_of(node, struct ltt_ust_channel, node); |
51755dc8 | 1462 | if (domain == ust_chan->domain) { |
fb198a11 JG |
1463 | ret = save_ust_channel(writer, ust_chan, session->ust_session); |
1464 | if (ret) { | |
1465 | rcu_read_unlock(); | |
1466 | goto end; | |
1467 | } | |
1468 | } | |
1469 | } | |
1470 | rcu_read_unlock(); | |
1471 | ||
1472 | /* /channels */ | |
1473 | ret = config_writer_close_element(writer); | |
1474 | if (ret) { | |
1475 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1476 | goto end; | |
1477 | } | |
51755dc8 | 1478 | |
e8fcabef | 1479 | if (domain == LTTNG_DOMAIN_UST) { |
847a5916 | 1480 | ret = config_writer_open_element(writer, |
e8fcabef | 1481 | config_element_trackers); |
847a5916 JR |
1482 | if (ret) { |
1483 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1484 | goto end; | |
1485 | } | |
1486 | ||
e8fcabef | 1487 | ret = save_pid_tracker(writer, session, LTTNG_DOMAIN_UST); |
847a5916 | 1488 | if (ret) { |
847a5916 JR |
1489 | goto end; |
1490 | } | |
1491 | ||
e8fcabef | 1492 | /* /trackers */ |
847a5916 JR |
1493 | ret = config_writer_close_element(writer); |
1494 | if (ret) { | |
847a5916 JR |
1495 | goto end; |
1496 | } | |
e8fcabef | 1497 | } |
847a5916 | 1498 | |
e8fcabef JG |
1499 | /* /domain */ |
1500 | ret = config_writer_close_element(writer); | |
1501 | if (ret) { | |
1502 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1503 | goto end; | |
847a5916 | 1504 | } |
e8fcabef | 1505 | |
847a5916 | 1506 | end: |
847a5916 JR |
1507 | return ret; |
1508 | } | |
1509 | ||
fb198a11 JG |
1510 | static |
1511 | int save_domains(struct config_writer *writer, struct ltt_session *session) | |
1512 | { | |
1513 | int ret = 0; | |
1514 | ||
1515 | assert(writer); | |
1516 | assert(session); | |
1517 | ||
1518 | if (!session->kernel_session && !session->ust_session) { | |
1519 | goto end; | |
1520 | } | |
1521 | ||
1522 | ret = config_writer_open_element(writer, config_element_domains); | |
1523 | if (ret) { | |
1524 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1525 | goto end; | |
1526 | } | |
1527 | ||
1528 | ||
1529 | if (session->kernel_session) { | |
1530 | ret = config_writer_open_element(writer, | |
1531 | config_element_domain); | |
1532 | if (ret) { | |
1533 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1534 | goto end; | |
1535 | } | |
1536 | ||
1537 | ret = save_kernel_session(writer, session); | |
1538 | if (ret) { | |
1539 | goto end; | |
1540 | } | |
1541 | ||
847a5916 JR |
1542 | ret = config_writer_open_element(writer, |
1543 | config_element_trackers); | |
1544 | if (ret) { | |
1545 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1546 | goto end; | |
1547 | } | |
1548 | ||
1549 | ret = save_pid_tracker(writer, session, LTTNG_DOMAIN_KERNEL); | |
1550 | if (ret) { | |
1551 | goto end; | |
1552 | } | |
1553 | ||
1554 | /* /trackers */ | |
1555 | ret = config_writer_close_element(writer); | |
1556 | if (ret) { | |
1557 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1558 | goto end; | |
1559 | } | |
fb198a11 JG |
1560 | /* /domain */ |
1561 | ret = config_writer_close_element(writer); | |
1562 | if (ret) { | |
1563 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1564 | goto end; | |
1565 | } | |
1566 | } | |
1567 | ||
1568 | if (session->ust_session) { | |
51755dc8 | 1569 | ret = save_ust_domain(writer, session, LTTNG_DOMAIN_UST); |
fb198a11 JG |
1570 | if (ret) { |
1571 | goto end; | |
1572 | } | |
1573 | ||
51755dc8 | 1574 | ret = save_ust_domain(writer, session, LTTNG_DOMAIN_JUL); |
fb198a11 | 1575 | if (ret) { |
fb198a11 JG |
1576 | goto end; |
1577 | } | |
fb198a11 | 1578 | |
51755dc8 JG |
1579 | ret = save_ust_domain(writer, session, LTTNG_DOMAIN_LOG4J); |
1580 | if (ret) { | |
1581 | goto end; | |
1582 | } | |
65d72c41 | 1583 | |
51755dc8 JG |
1584 | ret = save_ust_domain(writer, session, LTTNG_DOMAIN_PYTHON); |
1585 | if (ret) { | |
1586 | goto end; | |
fb198a11 JG |
1587 | } |
1588 | } | |
1589 | ||
1590 | /* /domains */ | |
1591 | ret = config_writer_close_element(writer); | |
1592 | if (ret) { | |
1593 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1594 | goto end; | |
1595 | } | |
1596 | end: | |
1597 | return ret; | |
1598 | } | |
1599 | ||
1600 | static | |
1601 | int save_consumer_output(struct config_writer *writer, | |
1602 | struct consumer_output *output) | |
1603 | { | |
1604 | int ret; | |
1605 | ||
1606 | assert(writer); | |
1607 | assert(output); | |
1608 | ||
1609 | ret = config_writer_open_element(writer, config_element_consumer_output); | |
1610 | if (ret) { | |
1611 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1612 | goto end; | |
1613 | } | |
1614 | ||
1615 | ret = config_writer_write_element_bool(writer, config_element_enabled, | |
1616 | output->enabled); | |
1617 | if (ret) { | |
1618 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1619 | goto end; | |
1620 | } | |
1621 | ||
1622 | ret = config_writer_open_element(writer, config_element_destination); | |
1623 | if (ret) { | |
1624 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1625 | goto end; | |
1626 | } | |
1627 | ||
1628 | switch (output->type) { | |
1629 | case CONSUMER_DST_LOCAL: | |
1630 | ret = config_writer_write_element_string(writer, | |
1631 | config_element_path, output->dst.trace_path); | |
1632 | if (ret) { | |
1633 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1634 | goto end; | |
1635 | } | |
1636 | break; | |
1637 | case CONSUMER_DST_NET: | |
1638 | { | |
1639 | char *uri; | |
1640 | ||
1641 | uri = zmalloc(PATH_MAX); | |
1642 | if (!uri) { | |
1643 | ret = LTTNG_ERR_NOMEM; | |
1644 | goto end; | |
1645 | } | |
1646 | ||
1647 | ret = config_writer_open_element(writer, config_element_net_output); | |
1648 | if (ret) { | |
1649 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1650 | goto end_net_output; | |
1651 | } | |
1652 | ||
1653 | if (output->dst.net.control_isset && | |
1654 | output->dst.net.data_isset) { | |
1655 | ret = uri_to_str_url(&output->dst.net.control, uri, PATH_MAX); | |
1656 | if (ret < 0) { | |
1657 | ret = LTTNG_ERR_INVALID; | |
1658 | goto end_net_output; | |
1659 | } | |
1660 | ||
1661 | ret = config_writer_write_element_string(writer, | |
1662 | config_element_control_uri, uri); | |
1663 | if (ret) { | |
1664 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1665 | goto end_net_output; | |
1666 | } | |
1667 | ||
1668 | ret = uri_to_str_url(&output->dst.net.data, uri, PATH_MAX); | |
1669 | if (ret < 0) { | |
1670 | ret = LTTNG_ERR_INVALID; | |
1671 | goto end_net_output; | |
1672 | } | |
1673 | ||
1674 | ret = config_writer_write_element_string(writer, | |
1675 | config_element_data_uri, uri); | |
1676 | if (ret) { | |
1677 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1678 | goto end_net_output; | |
1679 | } | |
1680 | ||
1681 | end_net_output: | |
1682 | free(uri); | |
1683 | if (ret) { | |
1684 | goto end; | |
1685 | } | |
1686 | } else { | |
1687 | ret = !output->dst.net.control_isset ? | |
1688 | LTTNG_ERR_URL_CTRL_MISS : | |
1689 | LTTNG_ERR_URL_DATA_MISS; | |
c39270e5 | 1690 | free(uri); |
fb198a11 JG |
1691 | goto end; |
1692 | } | |
1693 | ||
1694 | ret = config_writer_close_element(writer); | |
1695 | if (ret) { | |
1696 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1697 | goto end; | |
1698 | } | |
1699 | break; | |
1700 | } | |
1701 | default: | |
1702 | ERR("Unsupported consumer output type."); | |
1703 | ret = LTTNG_ERR_INVALID; | |
1704 | goto end; | |
1705 | } | |
1706 | ||
1707 | /* /destination */ | |
1708 | ret = config_writer_close_element(writer); | |
1709 | if (ret) { | |
1710 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1711 | goto end; | |
1712 | } | |
1713 | ||
1714 | /* /consumer_output */ | |
1715 | ret = config_writer_close_element(writer); | |
1716 | if (ret) { | |
1717 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1718 | goto end; | |
1719 | } | |
1720 | end: | |
1721 | return ret; | |
1722 | } | |
1723 | ||
1724 | static | |
1725 | int save_snapshot_outputs(struct config_writer *writer, | |
1726 | struct snapshot *snapshot) | |
1727 | { | |
1728 | int ret; | |
1729 | struct lttng_ht_iter iter; | |
1730 | struct snapshot_output *output; | |
1731 | ||
1732 | assert(writer); | |
1733 | assert(snapshot); | |
1734 | ||
1735 | ret = config_writer_open_element(writer, config_element_snapshot_outputs); | |
1736 | if (ret) { | |
1737 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1738 | goto end; | |
1739 | } | |
1740 | ||
1741 | rcu_read_lock(); | |
1742 | cds_lfht_for_each_entry(snapshot->output_ht->ht, &iter.iter, output, | |
1743 | node.node) { | |
1744 | ret = config_writer_open_element(writer, | |
1745 | config_element_output); | |
1746 | if (ret) { | |
1747 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1748 | goto end_unlock; | |
1749 | } | |
1750 | ||
1751 | ret = config_writer_write_element_string(writer, | |
1752 | config_element_name, output->name); | |
1753 | if (ret) { | |
1754 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1755 | goto end_unlock; | |
1756 | } | |
1757 | ||
1758 | ret = config_writer_write_element_unsigned_int(writer, | |
1759 | config_element_max_size, output->max_size); | |
1760 | if (ret) { | |
1761 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1762 | goto end_unlock; | |
1763 | } | |
1764 | ||
1765 | ret = save_consumer_output(writer, output->consumer); | |
1766 | if (ret) { | |
1767 | goto end_unlock; | |
1768 | } | |
1769 | ||
1770 | /* /output */ | |
1771 | ret = config_writer_close_element(writer); | |
1772 | if (ret) { | |
1773 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1774 | goto end_unlock; | |
1775 | } | |
1776 | } | |
1777 | rcu_read_unlock(); | |
1778 | ||
1779 | /* /snapshot_outputs */ | |
1780 | ret = config_writer_close_element(writer); | |
1781 | if (ret) { | |
1782 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1783 | goto end; | |
1784 | } | |
1785 | ||
1786 | end: | |
1787 | return ret; | |
1788 | end_unlock: | |
1789 | rcu_read_unlock(); | |
1790 | return ret; | |
1791 | } | |
1792 | ||
1793 | static | |
1794 | int save_session_output(struct config_writer *writer, | |
1795 | struct ltt_session *session) | |
1796 | { | |
1797 | int ret; | |
1798 | ||
1799 | assert(writer); | |
1800 | assert(session); | |
1801 | ||
1802 | if ((session->snapshot_mode && session->snapshot.nb_output == 0) || | |
1803 | (!session->snapshot_mode && !session->consumer)) { | |
1804 | /* Session is in no output mode */ | |
1805 | ret = 0; | |
1806 | goto end; | |
1807 | } | |
1808 | ||
1809 | ret = config_writer_open_element(writer, config_element_output); | |
1810 | if (ret) { | |
1811 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1812 | goto end; | |
1813 | } | |
1814 | ||
1815 | if (session->snapshot_mode) { | |
1816 | ret = save_snapshot_outputs(writer, &session->snapshot); | |
1817 | if (ret) { | |
1818 | goto end; | |
1819 | } | |
1820 | } else { | |
1821 | if (session->consumer) { | |
1822 | ret = save_consumer_output(writer, session->consumer); | |
1823 | if (ret) { | |
1824 | goto end; | |
1825 | } | |
1826 | } | |
1827 | } | |
1828 | ||
1829 | /* /output */ | |
1830 | ret = config_writer_close_element(writer); | |
1831 | if (ret) { | |
1832 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1833 | goto end; | |
1834 | } | |
1835 | end: | |
1836 | return ret; | |
1837 | } | |
1838 | ||
1839 | /* | |
1840 | * Save the given session. | |
1841 | * | |
1842 | * Return 0 on success else a LTTNG_ERR* code. | |
1843 | */ | |
1844 | static | |
1845 | int save_session(struct ltt_session *session, | |
1846 | struct lttng_save_session_attr *attr, lttng_sock_cred *creds) | |
1847 | { | |
1848 | int ret, fd; | |
db471218 | 1849 | unsigned int file_opened = 0; /* Indicate if the file has been opened */ |
fb198a11 JG |
1850 | char config_file_path[PATH_MAX]; |
1851 | size_t len; | |
1852 | struct config_writer *writer = NULL; | |
1853 | size_t session_name_len; | |
1854 | const char *provided_path; | |
1855 | ||
1856 | assert(session); | |
1857 | assert(attr); | |
1858 | assert(creds); | |
1859 | ||
1860 | session_name_len = strlen(session->name); | |
95a29ab8 | 1861 | memset(config_file_path, 0, sizeof(config_file_path)); |
fb198a11 JG |
1862 | |
1863 | if (!session_access_ok(session, | |
1864 | LTTNG_SOCK_GET_UID_CRED(creds), | |
1865 | LTTNG_SOCK_GET_GID_CRED(creds))) { | |
1866 | ret = LTTNG_ERR_EPERM; | |
1867 | goto end; | |
1868 | } | |
1869 | ||
1870 | provided_path = lttng_save_session_attr_get_output_url(attr); | |
1871 | if (provided_path) { | |
95a29ab8 | 1872 | DBG3("Save session in provided path %s", provided_path); |
fb198a11 | 1873 | len = strlen(provided_path); |
d2992717 | 1874 | if (len >= sizeof(config_file_path)) { |
fb198a11 JG |
1875 | ret = LTTNG_ERR_SET_URL; |
1876 | goto end; | |
1877 | } | |
1878 | strncpy(config_file_path, provided_path, len); | |
1879 | } else { | |
7e078ad1 | 1880 | ssize_t ret_len; |
fb198a11 JG |
1881 | char *home_dir = utils_get_user_home_dir( |
1882 | LTTNG_SOCK_GET_UID_CRED(creds)); | |
1883 | if (!home_dir) { | |
1884 | ret = LTTNG_ERR_SET_URL; | |
1885 | goto end; | |
1886 | } | |
1887 | ||
d2992717 | 1888 | ret_len = snprintf(config_file_path, sizeof(config_file_path), |
fb198a11 JG |
1889 | DEFAULT_SESSION_HOME_CONFIGPATH, home_dir); |
1890 | free(home_dir); | |
7e078ad1 | 1891 | if (ret_len < 0) { |
fb198a11 JG |
1892 | PERROR("snprintf save session"); |
1893 | ret = LTTNG_ERR_SET_URL; | |
1894 | goto end; | |
1895 | } | |
7e078ad1 | 1896 | len = ret_len; |
fb198a11 JG |
1897 | } |
1898 | ||
1899 | /* | |
d2992717 DG |
1900 | * Check the path fits in the config file path dst including the '/' |
1901 | * followed by trailing .lttng extension and the NULL terminated string. | |
fb198a11 | 1902 | */ |
d2992717 DG |
1903 | if ((len + session_name_len + 2 + |
1904 | sizeof(DEFAULT_SESSION_CONFIG_FILE_EXTENSION)) | |
1905 | > sizeof(config_file_path)) { | |
fb198a11 JG |
1906 | ret = LTTNG_ERR_SET_URL; |
1907 | goto end; | |
1908 | } | |
1909 | ||
1910 | ret = run_as_mkdir_recursive(config_file_path, S_IRWXU | S_IRWXG, | |
1911 | LTTNG_SOCK_GET_UID_CRED(creds), LTTNG_SOCK_GET_GID_CRED(creds)); | |
1912 | if (ret) { | |
1913 | ret = LTTNG_ERR_SET_URL; | |
1914 | goto end; | |
1915 | } | |
1916 | ||
d2992717 DG |
1917 | /* |
1918 | * At this point, we know that everything fits in the buffer. Validation | |
1919 | * was done just above. | |
1920 | */ | |
fb198a11 JG |
1921 | config_file_path[len++] = '/'; |
1922 | strncpy(config_file_path + len, session->name, session_name_len); | |
1923 | len += session_name_len; | |
1924 | strcpy(config_file_path + len, DEFAULT_SESSION_CONFIG_FILE_EXTENSION); | |
95a29ab8 DG |
1925 | len += sizeof(DEFAULT_SESSION_CONFIG_FILE_EXTENSION); |
1926 | config_file_path[len] = '\0'; | |
fb198a11 JG |
1927 | |
1928 | if (!access(config_file_path, F_OK) && !attr->overwrite) { | |
f9b57ab2 DG |
1929 | /* File exists, notify the user since the overwrite flag is off. */ |
1930 | ret = LTTNG_ERR_SAVE_FILE_EXIST; | |
fb198a11 JG |
1931 | goto end; |
1932 | } | |
1933 | ||
1934 | fd = run_as_open(config_file_path, O_CREAT | O_WRONLY | O_TRUNC, | |
1935 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP, | |
1936 | LTTNG_SOCK_GET_UID_CRED(creds), LTTNG_SOCK_GET_GID_CRED(creds)); | |
1937 | if (fd < 0) { | |
1938 | PERROR("Could not create configuration file"); | |
1939 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1940 | goto end; | |
1941 | } | |
db471218 | 1942 | file_opened = 1; |
fb198a11 | 1943 | |
705bb62f | 1944 | writer = config_writer_create(fd, 1); |
fb198a11 JG |
1945 | if (!writer) { |
1946 | ret = LTTNG_ERR_NOMEM; | |
1947 | goto end; | |
1948 | } | |
1949 | ||
1950 | ret = config_writer_open_element(writer, config_element_sessions); | |
1951 | if (ret) { | |
1952 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1953 | goto end; | |
1954 | } | |
1955 | ||
1956 | ret = config_writer_open_element(writer, config_element_session); | |
1957 | if (ret) { | |
1958 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1959 | goto end; | |
1960 | } | |
1961 | ||
1962 | ret = config_writer_write_element_string(writer, config_element_name, | |
1963 | session->name); | |
1964 | if (ret) { | |
1965 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1966 | goto end; | |
1967 | } | |
1968 | ||
9e7c9f56 JR |
1969 | if(session->shm_path[0] != '\0') { |
1970 | ret = config_writer_write_element_string(writer, | |
1971 | config_element_shared_memory_path, | |
1972 | session->shm_path); | |
1973 | if (ret) { | |
1974 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1975 | goto end; | |
1976 | } | |
1977 | } | |
1978 | ||
fb198a11 JG |
1979 | ret = save_domains(writer, session); |
1980 | if (ret) { | |
1981 | goto end; | |
1982 | } | |
1983 | ||
1984 | ret = config_writer_write_element_bool(writer, config_element_started, | |
8382cf6f | 1985 | session->active); |
fb198a11 JG |
1986 | if (ret) { |
1987 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1988 | goto end; | |
1989 | } | |
1990 | ||
1991 | if (session->snapshot_mode || session->live_timer) { | |
1992 | ret = config_writer_open_element(writer, config_element_attributes); | |
1993 | if (ret) { | |
1994 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1995 | goto end; | |
1996 | } | |
1997 | ||
1998 | if (session->snapshot_mode) { | |
1999 | ret = config_writer_write_element_bool(writer, | |
2000 | config_element_snapshot_mode, 1); | |
2001 | if (ret) { | |
2002 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2003 | goto end; | |
2004 | } | |
2005 | } else { | |
d98ad589 | 2006 | ret = config_writer_write_element_unsigned_int(writer, |
fb198a11 JG |
2007 | config_element_live_timer_interval, session->live_timer); |
2008 | if (ret) { | |
2009 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2010 | goto end; | |
2011 | } | |
2012 | } | |
2013 | ||
2014 | /* /attributes */ | |
2015 | ret = config_writer_close_element(writer); | |
2016 | if (ret) { | |
2017 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2018 | goto end; | |
2019 | } | |
2020 | } | |
2021 | ||
2022 | ret = save_session_output(writer, session); | |
2023 | if (ret) { | |
2024 | goto end; | |
2025 | } | |
2026 | ||
2027 | /* /session */ | |
2028 | ret = config_writer_close_element(writer); | |
2029 | if (ret) { | |
2030 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2031 | goto end; | |
2032 | } | |
2033 | ||
2034 | /* /sessions */ | |
2035 | ret = config_writer_close_element(writer); | |
2036 | if (ret) { | |
2037 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2038 | goto end; | |
2039 | } | |
2040 | end: | |
2041 | if (writer && config_writer_destroy(writer)) { | |
2042 | /* Preserve the original error code */ | |
2043 | ret = ret ? ret : LTTNG_ERR_SAVE_IO_FAIL; | |
2044 | } | |
2045 | if (ret) { | |
2046 | /* Delete file in case of error */ | |
db471218 | 2047 | if (file_opened && unlink(config_file_path)) { |
fb198a11 JG |
2048 | PERROR("Unlinking XML session configuration."); |
2049 | } | |
2050 | } | |
2051 | ||
2052 | return ret; | |
2053 | } | |
2054 | ||
2055 | int cmd_save_sessions(struct lttng_save_session_attr *attr, | |
2056 | lttng_sock_cred *creds) | |
2057 | { | |
2058 | int ret; | |
2059 | const char *session_name; | |
2060 | struct ltt_session *session; | |
2061 | ||
2062 | session_lock_list(); | |
2063 | ||
2064 | session_name = lttng_save_session_attr_get_session_name(attr); | |
2065 | if (session_name) { | |
2066 | session = session_find_by_name(session_name); | |
2067 | if (!session) { | |
2068 | ret = LTTNG_ERR_SESS_NOT_FOUND; | |
2069 | goto end; | |
2070 | } | |
2071 | ||
2072 | session_lock(session); | |
2073 | ret = save_session(session, attr, creds); | |
2074 | session_unlock(session); | |
2075 | if (ret) { | |
2076 | goto end; | |
2077 | } | |
2078 | } else { | |
2079 | struct ltt_session_list *list = session_get_list(); | |
2080 | ||
2081 | cds_list_for_each_entry(session, &list->head, list) { | |
2082 | session_lock(session); | |
2083 | ret = save_session(session, attr, creds); | |
2084 | session_unlock(session); | |
2085 | ||
2086 | /* Don't abort if we don't have the required permissions. */ | |
2087 | if (ret && ret != LTTNG_ERR_EPERM) { | |
2088 | goto end; | |
2089 | } | |
2090 | } | |
2091 | } | |
2092 | ret = LTTNG_OK; | |
2093 | ||
2094 | end: | |
2095 | session_unlock_list(); | |
2096 | return ret; | |
2097 | } |