Commit | Line | Data |
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fb198a11 JG |
1 | /* |
2 | * Copyright (C) 2014 - Jérémie Galarneau <jeremie.galarneau@efficios.com> | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms of the GNU General Public License, version 2 only, as | |
6 | * published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
11 | * more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License along with | |
14 | * this program; if not, write to the Free Software Foundation, Inc., 51 | |
15 | * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
16 | */ | |
17 | ||
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 | } | |
4fc2b126 JR |
107 | |
108 | if (attr->extended.ptr) { | |
109 | struct lttng_channel_extended *ext = NULL; | |
110 | ||
111 | ext = (struct lttng_channel_extended *) attr->extended.ptr; | |
112 | ret = config_writer_write_element_unsigned_int(writer, | |
113 | config_element_monitor_timer_interval, | |
114 | ext->monitor_timer_interval); | |
115 | if (ret) { | |
116 | goto end; | |
117 | } | |
118 | } | |
119 | ||
fb198a11 JG |
120 | end: |
121 | return ret ? LTTNG_ERR_SAVE_IO_FAIL : 0; | |
122 | } | |
123 | ||
124 | static | |
125 | int save_ust_channel_attributes(struct config_writer *writer, | |
126 | struct lttng_ust_channel_attr *attr) | |
127 | { | |
128 | int ret; | |
4fc2b126 | 129 | struct ltt_ust_channel *channel = NULL; |
fb198a11 JG |
130 | |
131 | ret = config_writer_write_element_string(writer, | |
132 | config_element_overwrite_mode, | |
133 | attr->overwrite ? config_overwrite_mode_overwrite : | |
134 | config_overwrite_mode_discard); | |
135 | if (ret) { | |
136 | goto end; | |
137 | } | |
138 | ||
139 | ret = config_writer_write_element_unsigned_int(writer, | |
140 | config_element_subbuf_size, attr->subbuf_size); | |
141 | if (ret) { | |
142 | goto end; | |
143 | } | |
144 | ||
145 | ret = config_writer_write_element_unsigned_int(writer, | |
146 | config_element_num_subbuf, | |
147 | attr->num_subbuf); | |
148 | if (ret) { | |
149 | goto end; | |
150 | } | |
151 | ||
152 | ret = config_writer_write_element_unsigned_int(writer, | |
153 | config_element_switch_timer_interval, | |
154 | attr->switch_timer_interval); | |
155 | if (ret) { | |
156 | goto end; | |
157 | } | |
158 | ||
159 | ret = config_writer_write_element_unsigned_int(writer, | |
160 | config_element_read_timer_interval, | |
161 | attr->read_timer_interval); | |
162 | if (ret) { | |
163 | goto end; | |
164 | } | |
165 | ||
166 | ret = config_writer_write_element_string(writer, | |
167 | config_element_output_type, | |
168 | attr->output == LTTNG_UST_MMAP ? | |
169 | config_output_type_mmap : config_output_type_splice); | |
170 | if (ret) { | |
171 | goto end; | |
172 | } | |
4fc2b126 JR |
173 | |
174 | /* | |
175 | * Fetch the monitor timer which is located in the parent of | |
176 | * lttng_ust_channel_attr | |
177 | */ | |
178 | channel = caa_container_of(attr, struct ltt_ust_channel, attr); | |
179 | ret = config_writer_write_element_unsigned_int(writer, | |
180 | config_element_monitor_timer_interval, | |
181 | channel->monitor_timer_interval); | |
182 | if (ret) { | |
183 | goto end; | |
184 | } | |
185 | ||
fb198a11 JG |
186 | end: |
187 | return ret ? LTTNG_ERR_SAVE_IO_FAIL : 0; | |
188 | } | |
189 | ||
190 | static | |
191 | const char *get_kernel_instrumentation_string( | |
192 | enum lttng_kernel_instrumentation instrumentation) | |
193 | { | |
194 | const char *instrumentation_string; | |
195 | ||
196 | switch (instrumentation) { | |
197 | case LTTNG_KERNEL_ALL: | |
198 | instrumentation_string = config_event_type_all; | |
199 | break; | |
200 | case LTTNG_KERNEL_TRACEPOINT: | |
201 | instrumentation_string = config_event_type_tracepoint; | |
202 | break; | |
203 | case LTTNG_KERNEL_KPROBE: | |
204 | instrumentation_string = config_event_type_kprobe; | |
205 | break; | |
206 | case LTTNG_KERNEL_FUNCTION: | |
207 | instrumentation_string = config_event_type_function; | |
208 | break; | |
209 | case LTTNG_KERNEL_KRETPROBE: | |
210 | instrumentation_string = config_event_type_kretprobe; | |
211 | break; | |
212 | case LTTNG_KERNEL_NOOP: | |
213 | instrumentation_string = config_event_type_noop; | |
214 | break; | |
215 | case LTTNG_KERNEL_SYSCALL: | |
216 | instrumentation_string = config_event_type_syscall; | |
217 | break; | |
218 | default: | |
219 | instrumentation_string = NULL; | |
220 | } | |
221 | ||
222 | return instrumentation_string; | |
223 | } | |
224 | ||
225 | static | |
226 | const char *get_kernel_context_type_string( | |
227 | enum lttng_kernel_context_type context_type) | |
228 | { | |
229 | const char *context_type_string; | |
230 | ||
231 | switch (context_type) { | |
232 | case LTTNG_KERNEL_CONTEXT_PID: | |
233 | context_type_string = config_event_context_pid; | |
234 | break; | |
235 | case LTTNG_KERNEL_CONTEXT_PROCNAME: | |
236 | context_type_string = config_event_context_procname; | |
237 | break; | |
238 | case LTTNG_KERNEL_CONTEXT_PRIO: | |
239 | context_type_string = config_event_context_prio; | |
240 | break; | |
241 | case LTTNG_KERNEL_CONTEXT_NICE: | |
242 | context_type_string = config_event_context_nice; | |
243 | break; | |
244 | case LTTNG_KERNEL_CONTEXT_VPID: | |
245 | context_type_string = config_event_context_vpid; | |
246 | break; | |
247 | case LTTNG_KERNEL_CONTEXT_TID: | |
248 | context_type_string = config_event_context_tid; | |
249 | break; | |
250 | case LTTNG_KERNEL_CONTEXT_VTID: | |
251 | context_type_string = config_event_context_vtid; | |
252 | break; | |
253 | case LTTNG_KERNEL_CONTEXT_PPID: | |
254 | context_type_string = config_event_context_ppid; | |
255 | break; | |
256 | case LTTNG_KERNEL_CONTEXT_VPPID: | |
257 | context_type_string = config_event_context_vppid; | |
258 | break; | |
259 | case LTTNG_KERNEL_CONTEXT_HOSTNAME: | |
260 | context_type_string = config_event_context_hostname; | |
261 | break; | |
1ae5e83e JD |
262 | case LTTNG_KERNEL_CONTEXT_INTERRUPTIBLE: |
263 | context_type_string = config_event_context_interruptible; | |
264 | break; | |
265 | case LTTNG_KERNEL_CONTEXT_PREEMPTIBLE: | |
266 | context_type_string = config_event_context_preemptible; | |
267 | break; | |
268 | case LTTNG_KERNEL_CONTEXT_NEED_RESCHEDULE: | |
269 | context_type_string = config_event_context_need_reschedule; | |
270 | break; | |
271 | case LTTNG_KERNEL_CONTEXT_MIGRATABLE: | |
272 | context_type_string = config_event_context_migratable; | |
273 | break; | |
fb198a11 JG |
274 | default: |
275 | context_type_string = NULL; | |
276 | } | |
277 | ||
278 | return context_type_string; | |
279 | } | |
280 | ||
281 | static | |
282 | const char *get_ust_context_type_string( | |
283 | enum lttng_ust_context_type context_type) | |
284 | { | |
285 | const char *context_type_string; | |
286 | ||
287 | switch (context_type) { | |
288 | case LTTNG_UST_CONTEXT_PROCNAME: | |
289 | context_type_string = config_event_context_procname; | |
290 | break; | |
291 | case LTTNG_UST_CONTEXT_VPID: | |
292 | context_type_string = config_event_context_vpid; | |
293 | break; | |
294 | case LTTNG_UST_CONTEXT_VTID: | |
295 | context_type_string = config_event_context_vtid; | |
296 | break; | |
297 | case LTTNG_UST_CONTEXT_IP: | |
298 | context_type_string = config_event_context_ip; | |
299 | break; | |
300 | case LTTNG_UST_CONTEXT_PTHREAD_ID: | |
301 | context_type_string = config_event_context_pthread_id; | |
302 | break; | |
045fc617 JG |
303 | case LTTNG_UST_CONTEXT_APP_CONTEXT: |
304 | context_type_string = config_event_context_app; | |
305 | break; | |
e885a367 | 306 | case LTTNG_UST_CONTEXT_PERF_THREAD_COUNTER: |
14ce5bd8 JG |
307 | /* |
308 | * Error, should not be stored in the XML, perf contexts | |
309 | * are stored as a node of type event_perf_context_type. | |
310 | */ | |
fb198a11 JG |
311 | default: |
312 | context_type_string = NULL; | |
e885a367 | 313 | break; |
fb198a11 JG |
314 | } |
315 | ||
316 | return context_type_string; | |
317 | } | |
318 | ||
319 | static | |
320 | const char *get_buffer_type_string( | |
321 | enum lttng_buffer_type buffer_type) | |
322 | { | |
323 | const char *buffer_type_string; | |
324 | ||
325 | switch (buffer_type) { | |
326 | case LTTNG_BUFFER_PER_PID: | |
327 | buffer_type_string = config_buffer_type_per_pid; | |
328 | break; | |
329 | case LTTNG_BUFFER_PER_UID: | |
330 | buffer_type_string = config_buffer_type_per_uid; | |
331 | break; | |
332 | case LTTNG_BUFFER_GLOBAL: | |
333 | buffer_type_string = config_buffer_type_global; | |
334 | break; | |
335 | default: | |
336 | buffer_type_string = NULL; | |
337 | } | |
338 | ||
339 | return buffer_type_string; | |
340 | } | |
341 | ||
342 | static | |
343 | const char *get_loglevel_type_string( | |
344 | enum lttng_ust_loglevel_type loglevel_type) | |
345 | { | |
346 | const char *loglevel_type_string; | |
347 | ||
348 | switch (loglevel_type) { | |
349 | case LTTNG_UST_LOGLEVEL_ALL: | |
350 | loglevel_type_string = config_loglevel_type_all; | |
351 | break; | |
352 | case LTTNG_UST_LOGLEVEL_RANGE: | |
353 | loglevel_type_string = config_loglevel_type_range; | |
354 | break; | |
355 | case LTTNG_UST_LOGLEVEL_SINGLE: | |
356 | loglevel_type_string = config_loglevel_type_single; | |
357 | break; | |
358 | default: | |
359 | loglevel_type_string = NULL; | |
360 | } | |
361 | ||
362 | return loglevel_type_string; | |
363 | } | |
364 | ||
365 | static | |
366 | int save_kernel_event(struct config_writer *writer, | |
367 | struct ltt_kernel_event *event) | |
368 | { | |
369 | int ret; | |
370 | const char *instrumentation_type; | |
371 | ||
372 | ret = config_writer_open_element(writer, config_element_event); | |
373 | if (ret) { | |
374 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
375 | goto end; | |
376 | } | |
377 | ||
378 | if (event->event->name[0]) { | |
379 | ret = config_writer_write_element_string(writer, | |
380 | config_element_name, event->event->name); | |
381 | if (ret) { | |
382 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
383 | goto end; | |
384 | } | |
385 | } | |
386 | ||
387 | ret = config_writer_write_element_bool(writer, config_element_enabled, | |
388 | event->enabled); | |
389 | if (ret) { | |
390 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
391 | goto end; | |
392 | } | |
393 | ||
394 | instrumentation_type = get_kernel_instrumentation_string( | |
395 | event->event->instrumentation); | |
396 | if (!instrumentation_type) { | |
397 | ret = LTTNG_ERR_INVALID; | |
398 | goto end; | |
399 | } | |
400 | ||
401 | ret = config_writer_write_element_string(writer, config_element_type, | |
402 | instrumentation_type); | |
403 | if (ret) { | |
404 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
405 | goto end; | |
406 | } | |
407 | ||
911d1560 JG |
408 | if (event->filter_expression) { |
409 | ret = config_writer_write_element_string(writer, | |
410 | config_element_filter, | |
411 | event->filter_expression); | |
412 | if (ret) { | |
413 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
414 | goto end; | |
415 | } | |
416 | } | |
417 | ||
fb198a11 JG |
418 | if (event->event->instrumentation == LTTNG_KERNEL_FUNCTION || |
419 | event->event->instrumentation == LTTNG_KERNEL_KPROBE || | |
420 | event->event->instrumentation == LTTNG_KERNEL_KRETPROBE) { | |
421 | ||
422 | ret = config_writer_open_element(writer, | |
423 | config_element_attributes); | |
424 | if (ret) { | |
425 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
426 | goto end; | |
427 | } | |
428 | ||
429 | switch (event->event->instrumentation) { | |
0de3eda1 | 430 | case LTTNG_KERNEL_SYSCALL: |
fb198a11 JG |
431 | case LTTNG_KERNEL_FUNCTION: |
432 | ret = config_writer_open_element(writer, | |
433 | config_element_function_attributes); | |
434 | if (ret) { | |
435 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
436 | goto end; | |
437 | } | |
438 | ||
439 | ret = config_writer_write_element_string(writer, | |
440 | config_element_name, | |
441 | event->event->u.ftrace.symbol_name); | |
442 | if (ret) { | |
443 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
444 | goto end; | |
445 | } | |
446 | ||
447 | /* /function attributes */ | |
448 | ret = config_writer_close_element(writer); | |
449 | if (ret) { | |
450 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
451 | goto end; | |
452 | } | |
453 | break; | |
454 | case LTTNG_KERNEL_KPROBE: | |
455 | case LTTNG_KERNEL_KRETPROBE: | |
456 | { | |
457 | const char *symbol_name; | |
458 | uint64_t addr; | |
459 | uint64_t offset; | |
460 | ||
461 | if (event->event->instrumentation == | |
462 | LTTNG_KERNEL_KPROBE) { | |
463 | /* | |
464 | * Comments in lttng-kernel.h mention that | |
465 | * either addr or symbol_name are set, not both. | |
466 | */ | |
467 | addr = event->event->u.kprobe.addr; | |
468 | offset = event->event->u.kprobe.offset; | |
469 | symbol_name = addr ? NULL : | |
470 | event->event->u.kprobe.symbol_name; | |
471 | } else { | |
472 | symbol_name = | |
473 | event->event->u.kretprobe.symbol_name; | |
474 | addr = event->event->u.kretprobe.addr; | |
475 | offset = event->event->u.kretprobe.offset; | |
476 | } | |
477 | ||
478 | ret = config_writer_open_element(writer, | |
479 | config_element_probe_attributes); | |
480 | if (ret) { | |
481 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
482 | goto end; | |
483 | } | |
484 | ||
485 | if (symbol_name) { | |
486 | ret = config_writer_write_element_string(writer, | |
487 | config_element_symbol_name, | |
488 | symbol_name); | |
489 | if (ret) { | |
490 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
491 | goto end; | |
492 | } | |
493 | } | |
494 | ||
495 | if (addr) { | |
496 | ret = config_writer_write_element_unsigned_int( | |
497 | writer, config_element_address, addr); | |
498 | if (ret) { | |
499 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
500 | goto end; | |
501 | } | |
502 | } | |
503 | ||
504 | if (offset) { | |
505 | ret = config_writer_write_element_unsigned_int( | |
506 | writer, config_element_offset, offset); | |
507 | if (ret) { | |
508 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
509 | goto end; | |
510 | } | |
511 | } | |
512 | ||
513 | ret = config_writer_close_element(writer); | |
514 | if (ret) { | |
515 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
516 | goto end; | |
517 | } | |
518 | break; | |
519 | } | |
520 | default: | |
521 | ERR("Unsupported kernel instrumentation type."); | |
522 | ret = LTTNG_ERR_INVALID; | |
523 | goto end; | |
524 | } | |
525 | ||
526 | /* /attributes */ | |
527 | ret = config_writer_close_element(writer); | |
528 | if (ret) { | |
529 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
530 | goto end; | |
531 | } | |
532 | } | |
533 | ||
534 | /* /event */ | |
535 | ret = config_writer_close_element(writer); | |
536 | if (ret) { | |
537 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
538 | goto end; | |
539 | } | |
540 | end: | |
541 | return ret; | |
542 | } | |
543 | ||
544 | static | |
545 | int save_kernel_events(struct config_writer *writer, | |
0de3eda1 | 546 | struct ltt_kernel_channel *kchan) |
fb198a11 JG |
547 | { |
548 | int ret; | |
549 | struct ltt_kernel_event *event; | |
550 | ||
551 | ret = config_writer_open_element(writer, config_element_events); | |
552 | if (ret) { | |
553 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
554 | goto end; | |
555 | } | |
556 | ||
0de3eda1 | 557 | cds_list_for_each_entry(event, &kchan->events_list.head, list) { |
fb198a11 JG |
558 | ret = save_kernel_event(writer, event); |
559 | if (ret) { | |
560 | goto end; | |
561 | } | |
562 | } | |
563 | ||
564 | /* /events */ | |
565 | ret = config_writer_close_element(writer); | |
566 | if (ret) { | |
567 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
568 | goto end; | |
569 | } | |
570 | end: | |
571 | return ret; | |
572 | } | |
573 | ||
574 | static | |
575 | int save_ust_event(struct config_writer *writer, | |
576 | struct ltt_ust_event *event) | |
577 | { | |
578 | int ret; | |
579 | const char *loglevel_type_string; | |
580 | ||
581 | ret = config_writer_open_element(writer, config_element_event); | |
582 | if (ret) { | |
583 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
584 | goto end; | |
585 | } | |
586 | ||
587 | if (event->attr.name[0]) { | |
588 | ret = config_writer_write_element_string(writer, | |
589 | config_element_name, event->attr.name); | |
590 | if (ret) { | |
591 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
592 | goto end; | |
593 | } | |
594 | } | |
595 | ||
596 | ret = config_writer_write_element_bool(writer, config_element_enabled, | |
597 | event->enabled); | |
598 | if (ret) { | |
599 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
600 | goto end; | |
601 | } | |
602 | ||
603 | if (event->attr.instrumentation != LTTNG_UST_TRACEPOINT) { | |
604 | ERR("Unsupported UST instrumentation type."); | |
605 | ret = LTTNG_ERR_INVALID; | |
606 | goto end; | |
607 | } | |
608 | ret = config_writer_write_element_string(writer, config_element_type, | |
609 | config_event_type_tracepoint); | |
610 | if (ret) { | |
611 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
612 | goto end; | |
613 | } | |
614 | ||
615 | loglevel_type_string = get_loglevel_type_string( | |
616 | event->attr.loglevel_type); | |
617 | if (!loglevel_type_string) { | |
618 | ERR("Unsupported UST loglevel type."); | |
619 | ret = LTTNG_ERR_INVALID; | |
620 | goto end; | |
621 | } | |
622 | ||
623 | ret = config_writer_write_element_string(writer, | |
624 | config_element_loglevel_type, loglevel_type_string); | |
625 | if (ret) { | |
626 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
627 | goto end; | |
628 | } | |
629 | ||
1adbdb10 JG |
630 | /* The log level is irrelevant if no "filtering" is enabled */ |
631 | if (event->attr.loglevel_type != LTTNG_UST_LOGLEVEL_ALL) { | |
632 | ret = config_writer_write_element_signed_int(writer, | |
633 | config_element_loglevel, event->attr.loglevel); | |
634 | if (ret) { | |
635 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
636 | goto end; | |
637 | } | |
fb198a11 JG |
638 | } |
639 | ||
640 | if (event->filter_expression) { | |
641 | ret = config_writer_write_element_string(writer, | |
642 | config_element_filter, event->filter_expression); | |
643 | if (ret) { | |
644 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
645 | goto end; | |
646 | } | |
647 | } | |
648 | ||
649 | if (event->exclusion && event->exclusion->count) { | |
650 | uint32_t i; | |
651 | ||
652 | ret = config_writer_open_element(writer, | |
653 | config_element_exclusions); | |
654 | if (ret) { | |
655 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
656 | goto end; | |
657 | } | |
658 | ||
659 | for (i = 0; i < event->exclusion->count; i++) { | |
660 | ret = config_writer_write_element_string(writer, | |
661 | config_element_exclusion, | |
d7af3565 PP |
662 | LTTNG_EVENT_EXCLUSION_NAME_AT( |
663 | event->exclusion, i)); | |
fb198a11 JG |
664 | if (ret) { |
665 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
666 | goto end; | |
667 | } | |
668 | } | |
669 | ||
670 | /* /exclusions */ | |
671 | ret = config_writer_close_element(writer); | |
672 | if (ret) { | |
673 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
674 | goto end; | |
675 | } | |
676 | } | |
677 | ||
678 | /* /event */ | |
679 | ret = config_writer_close_element(writer); | |
680 | if (ret) { | |
681 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
682 | goto end; | |
683 | } | |
684 | end: | |
685 | return ret; | |
686 | } | |
687 | ||
688 | static | |
689 | int save_ust_events(struct config_writer *writer, | |
690 | struct lttng_ht *events) | |
691 | { | |
692 | int ret; | |
693 | struct ltt_ust_event *event; | |
694 | struct lttng_ht_node_str *node; | |
695 | struct lttng_ht_iter iter; | |
696 | ||
697 | ret = config_writer_open_element(writer, config_element_events); | |
698 | if (ret) { | |
699 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
700 | goto end; | |
701 | } | |
702 | ||
703 | rcu_read_lock(); | |
704 | cds_lfht_for_each_entry(events->ht, &iter.iter, node, node) { | |
705 | event = caa_container_of(node, struct ltt_ust_event, node); | |
706 | ||
af325ba1 JG |
707 | if (event->internal) { |
708 | /* Internal events must not be exposed to clients */ | |
709 | continue; | |
710 | } | |
fb198a11 JG |
711 | ret = save_ust_event(writer, event); |
712 | if (ret) { | |
713 | rcu_read_unlock(); | |
714 | goto end; | |
715 | } | |
716 | } | |
717 | rcu_read_unlock(); | |
718 | ||
719 | /* /events */ | |
720 | ret = config_writer_close_element(writer); | |
721 | if (ret) { | |
722 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
723 | goto end; | |
724 | } | |
725 | end: | |
726 | return ret; | |
727 | } | |
728 | ||
51755dc8 | 729 | static |
0b35b846 | 730 | int init_ust_event_from_agent_event(struct ltt_ust_event *ust_event, |
51755dc8 JG |
731 | struct agent_event *agent_event) |
732 | { | |
0b35b846 JG |
733 | int ret = 0; |
734 | enum lttng_ust_loglevel_type ust_loglevel_type; | |
735 | ||
51755dc8 JG |
736 | ust_event->enabled = agent_event->enabled; |
737 | ust_event->attr.instrumentation = LTTNG_UST_TRACEPOINT; | |
d333bdaa MD |
738 | if (lttng_strncpy(ust_event->attr.name, agent_event->name, |
739 | LTTNG_SYMBOL_NAME_LEN)) { | |
740 | ret = -1; | |
741 | goto end; | |
742 | } | |
0b35b846 JG |
743 | switch (agent_event->loglevel_type) { |
744 | case LTTNG_EVENT_LOGLEVEL_ALL: | |
745 | ust_loglevel_type = LTTNG_UST_LOGLEVEL_ALL; | |
746 | break; | |
747 | case LTTNG_EVENT_LOGLEVEL_SINGLE: | |
748 | ust_loglevel_type = LTTNG_UST_LOGLEVEL_SINGLE; | |
749 | break; | |
750 | case LTTNG_EVENT_LOGLEVEL_RANGE: | |
751 | ust_loglevel_type = LTTNG_UST_LOGLEVEL_RANGE; | |
752 | break; | |
753 | default: | |
754 | ERR("Invalid agent_event loglevel_type."); | |
755 | ret = -1; | |
756 | goto end; | |
757 | } | |
758 | ||
759 | ust_event->attr.loglevel_type = ust_loglevel_type; | |
2106efa0 | 760 | ust_event->attr.loglevel = agent_event->loglevel_value; |
51755dc8 JG |
761 | ust_event->filter_expression = agent_event->filter_expression; |
762 | ust_event->exclusion = agent_event->exclusion; | |
0b35b846 JG |
763 | end: |
764 | return ret; | |
51755dc8 JG |
765 | } |
766 | ||
767 | static | |
768 | int save_agent_events(struct config_writer *writer, | |
769 | struct ltt_ust_channel *chan, | |
770 | struct agent *agent) | |
771 | { | |
772 | int ret; | |
773 | struct lttng_ht_iter iter; | |
774 | struct lttng_ht_node_str *node; | |
775 | ||
776 | ret = config_writer_open_element(writer, config_element_events); | |
777 | if (ret) { | |
778 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
779 | goto end; | |
780 | } | |
781 | ||
782 | rcu_read_lock(); | |
783 | cds_lfht_for_each_entry(agent->events->ht, &iter.iter, node, node) { | |
784 | int ret; | |
785 | struct agent_event *agent_event; | |
786 | struct ltt_ust_event fake_event; | |
787 | ||
788 | memset(&fake_event, 0, sizeof(fake_event)); | |
789 | agent_event = caa_container_of(node, struct agent_event, node); | |
790 | ||
791 | /* | |
792 | * Initialize a fake ust event to reuse the same serialization | |
793 | * function since UST and agent events contain the same info | |
794 | * (and one could wonder why they don't reuse the same | |
795 | * structures...). | |
796 | */ | |
0b35b846 JG |
797 | ret = init_ust_event_from_agent_event(&fake_event, agent_event); |
798 | if (ret) { | |
799 | rcu_read_unlock(); | |
800 | goto end; | |
801 | } | |
51755dc8 JG |
802 | ret = save_ust_event(writer, &fake_event); |
803 | if (ret) { | |
804 | rcu_read_unlock(); | |
805 | goto end; | |
806 | } | |
807 | } | |
808 | rcu_read_unlock(); | |
809 | ||
810 | /* /events */ | |
811 | ret = config_writer_close_element(writer); | |
812 | if (ret) { | |
813 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
814 | goto end; | |
815 | } | |
816 | end: | |
817 | return ret; | |
818 | } | |
819 | ||
fb198a11 JG |
820 | static |
821 | int save_kernel_context(struct config_writer *writer, | |
822 | struct lttng_kernel_context *ctx) | |
823 | { | |
824 | int ret = 0; | |
825 | ||
826 | if (!ctx) { | |
827 | goto end; | |
828 | } | |
829 | ||
fb198a11 JG |
830 | ret = config_writer_open_element(writer, config_element_context); |
831 | if (ret) { | |
832 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
833 | goto end; | |
834 | } | |
835 | ||
cba45eda | 836 | if (ctx->ctx == LTTNG_KERNEL_CONTEXT_PERF_CPU_COUNTER) { |
045fc617 JG |
837 | ret = config_writer_open_element(writer, |
838 | config_element_context_perf); | |
fb198a11 JG |
839 | if (ret) { |
840 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
841 | goto end; | |
842 | } | |
843 | ||
844 | ret = config_writer_write_element_unsigned_int(writer, | |
845 | config_element_type, ctx->u.perf_counter.type); | |
846 | if (ret) { | |
847 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
848 | goto end; | |
849 | } | |
850 | ||
851 | ret = config_writer_write_element_unsigned_int(writer, | |
852 | config_element_config, ctx->u.perf_counter.config); | |
853 | if (ret) { | |
854 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
855 | goto end; | |
856 | } | |
857 | ||
858 | ret = config_writer_write_element_string(writer, | |
859 | config_element_name, ctx->u.perf_counter.name); | |
860 | if (ret) { | |
861 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
862 | goto end; | |
863 | } | |
864 | ||
865 | /* /perf */ | |
866 | ret = config_writer_close_element(writer); | |
867 | if (ret) { | |
868 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
869 | goto end; | |
870 | } | |
871 | } else { | |
872 | const char *context_type_string = | |
873 | get_kernel_context_type_string(ctx->ctx); | |
874 | ||
875 | if (!context_type_string) { | |
876 | ERR("Unsupported kernel context type."); | |
877 | ret = LTTNG_ERR_INVALID; | |
878 | goto end; | |
879 | } | |
880 | ||
881 | ret = config_writer_write_element_string(writer, | |
882 | config_element_type, context_type_string); | |
883 | if (ret) { | |
884 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
885 | goto end; | |
886 | } | |
887 | } | |
888 | ||
889 | /* /context */ | |
890 | ret = config_writer_close_element(writer); | |
891 | if (ret) { | |
892 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
893 | goto end; | |
894 | } | |
895 | ||
645328ae DG |
896 | end: |
897 | return ret; | |
898 | } | |
899 | ||
900 | static | |
901 | int save_kernel_contexts(struct config_writer *writer, | |
902 | struct ltt_kernel_channel *kchan) | |
903 | { | |
904 | int ret; | |
905 | struct ltt_kernel_context *ctx; | |
906 | ||
2aa64052 JG |
907 | if (cds_list_empty(&kchan->ctx_list)) { |
908 | ret = 0; | |
909 | goto end; | |
910 | } | |
911 | ||
645328ae DG |
912 | ret = config_writer_open_element(writer, config_element_contexts); |
913 | if (ret) { | |
914 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
915 | goto end; | |
916 | } | |
917 | ||
918 | cds_list_for_each_entry(ctx, &kchan->ctx_list, list) { | |
919 | ret = save_kernel_context(writer, &ctx->ctx); | |
920 | if (ret) { | |
921 | goto end; | |
922 | } | |
923 | } | |
924 | ||
fb198a11 JG |
925 | /* /contexts */ |
926 | ret = config_writer_close_element(writer); | |
927 | if (ret) { | |
928 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
929 | goto end; | |
930 | } | |
931 | end: | |
932 | return ret; | |
933 | } | |
934 | ||
045fc617 JG |
935 | static |
936 | int save_ust_context_perf_thread_counter(struct config_writer *writer, | |
937 | struct ltt_ust_context *ctx) | |
938 | { | |
939 | int ret; | |
940 | ||
941 | assert(writer); | |
942 | assert(ctx); | |
943 | ||
944 | /* Perf contexts are saved as event_perf_context_type */ | |
945 | ret = config_writer_open_element(writer, config_element_context_perf); | |
946 | if (ret) { | |
947 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
948 | goto end; | |
949 | } | |
950 | ||
951 | ret = config_writer_write_element_unsigned_int(writer, | |
952 | config_element_type, ctx->ctx.u.perf_counter.type); | |
953 | if (ret) { | |
954 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
955 | goto end; | |
956 | } | |
957 | ||
958 | ret = config_writer_write_element_unsigned_int(writer, | |
959 | config_element_config, ctx->ctx.u.perf_counter.config); | |
960 | if (ret) { | |
961 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
962 | goto end; | |
963 | } | |
964 | ||
965 | ret = config_writer_write_element_string(writer, config_element_name, | |
966 | ctx->ctx.u.perf_counter.name); | |
967 | if (ret) { | |
968 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
969 | goto end; | |
970 | } | |
971 | ||
972 | /* /perf */ | |
973 | ret = config_writer_close_element(writer); | |
974 | if (ret) { | |
975 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
976 | goto end; | |
977 | } | |
978 | end: | |
979 | return ret; | |
980 | } | |
981 | ||
982 | static | |
983 | int save_ust_context_app_ctx(struct config_writer *writer, | |
984 | struct ltt_ust_context *ctx) | |
985 | { | |
986 | int ret; | |
987 | ||
988 | assert(writer); | |
989 | assert(ctx); | |
990 | ||
991 | /* Application contexts are saved as application_context_type */ | |
992 | ret = config_writer_open_element(writer, config_element_context_app); | |
993 | if (ret) { | |
994 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
995 | goto end; | |
996 | } | |
997 | ||
998 | ret = config_writer_write_element_string(writer, | |
999 | config_element_context_app_provider_name, | |
1000 | ctx->ctx.u.app_ctx.provider_name); | |
1001 | if (ret) { | |
1002 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1003 | goto end; | |
1004 | } | |
1005 | ||
1006 | ret = config_writer_write_element_string(writer, | |
1007 | config_element_context_app_ctx_name, | |
1008 | ctx->ctx.u.app_ctx.ctx_name); | |
1009 | if (ret) { | |
1010 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1011 | goto end; | |
1012 | } | |
1013 | ||
1014 | /* /app */ | |
1015 | ret = config_writer_close_element(writer); | |
1016 | if (ret) { | |
1017 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1018 | goto end; | |
1019 | } | |
1020 | end: | |
1021 | return ret; | |
1022 | } | |
1023 | ||
1024 | static | |
1025 | int save_ust_context_generic(struct config_writer *writer, | |
1026 | struct ltt_ust_context *ctx) | |
1027 | { | |
1028 | int ret; | |
1029 | const char *context_type_string; | |
1030 | ||
1031 | assert(writer); | |
1032 | assert(ctx); | |
1033 | ||
1034 | /* Save context as event_context_type_type */ | |
1035 | context_type_string = get_ust_context_type_string( | |
1036 | ctx->ctx.ctx); | |
1037 | if (!context_type_string) { | |
1038 | ERR("Unsupported UST context type."); | |
1039 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1040 | goto end; | |
1041 | } | |
1042 | ||
1043 | ret = config_writer_write_element_string(writer, | |
1044 | config_element_type, context_type_string); | |
1045 | if (ret) { | |
1046 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1047 | goto end; | |
1048 | } | |
1049 | end: | |
1050 | return ret; | |
1051 | } | |
1052 | ||
fb198a11 JG |
1053 | static |
1054 | int save_ust_context(struct config_writer *writer, | |
1055 | struct cds_list_head *ctx_list) | |
1056 | { | |
1057 | int ret; | |
1058 | struct ltt_ust_context *ctx; | |
1059 | ||
1060 | assert(writer); | |
1061 | assert(ctx_list); | |
1062 | ||
1063 | ret = config_writer_open_element(writer, config_element_contexts); | |
1064 | if (ret) { | |
1065 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1066 | goto end; | |
1067 | } | |
1068 | ||
1069 | cds_list_for_each_entry(ctx, ctx_list, list) { | |
fb198a11 JG |
1070 | ret = config_writer_open_element(writer, |
1071 | config_element_context); | |
1072 | if (ret) { | |
1073 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1074 | goto end; | |
1075 | } | |
1076 | ||
045fc617 JG |
1077 | switch (ctx->ctx.ctx) { |
1078 | case LTTNG_UST_CONTEXT_PERF_THREAD_COUNTER: | |
1079 | ret = save_ust_context_perf_thread_counter(writer, ctx); | |
1080 | break; | |
1081 | case LTTNG_UST_CONTEXT_APP_CONTEXT: | |
1082 | ret = save_ust_context_app_ctx(writer, ctx); | |
1083 | break; | |
1084 | default: | |
1085 | /* Save generic context. */ | |
1086 | ret = save_ust_context_generic(writer, ctx); | |
1087 | } | |
1088 | if (ret) { | |
1089 | goto end; | |
fb198a11 JG |
1090 | } |
1091 | ||
1092 | /* /context */ | |
1093 | ret = config_writer_close_element(writer); | |
1094 | if (ret) { | |
1095 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1096 | goto end; | |
1097 | } | |
1098 | } | |
1099 | ||
1100 | /* /contexts */ | |
1101 | ret = config_writer_close_element(writer); | |
1102 | if (ret) { | |
1103 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1104 | goto end; | |
1105 | } | |
1106 | end: | |
1107 | return ret; | |
1108 | } | |
1109 | ||
1110 | static | |
1111 | int save_kernel_channel(struct config_writer *writer, | |
1112 | struct ltt_kernel_channel *kchan) | |
1113 | { | |
1114 | int ret; | |
1115 | ||
1116 | assert(writer); | |
1117 | assert(kchan); | |
1118 | ||
1119 | ret = config_writer_open_element(writer, config_element_channel); | |
1120 | if (ret) { | |
1121 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1122 | goto end; | |
1123 | } | |
1124 | ||
1125 | ret = config_writer_write_element_string(writer, config_element_name, | |
1126 | kchan->channel->name); | |
1127 | if (ret) { | |
1128 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1129 | goto end; | |
1130 | } | |
1131 | ||
1132 | ret = config_writer_write_element_bool(writer, config_element_enabled, | |
1133 | kchan->channel->enabled); | |
1134 | if (ret) { | |
1135 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1136 | goto end; | |
1137 | } | |
1138 | ||
1139 | ret = save_kernel_channel_attributes(writer, &kchan->channel->attr); | |
1140 | if (ret) { | |
1141 | goto end; | |
1142 | } | |
1143 | ||
0de3eda1 | 1144 | ret = save_kernel_events(writer, kchan); |
fb198a11 JG |
1145 | if (ret) { |
1146 | goto end; | |
1147 | } | |
1148 | ||
645328ae | 1149 | ret = save_kernel_contexts(writer, kchan); |
fb198a11 JG |
1150 | if (ret) { |
1151 | goto end; | |
1152 | } | |
1153 | ||
1154 | /* /channel */ | |
1155 | ret = config_writer_close_element(writer); | |
1156 | if (ret) { | |
1157 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1158 | goto end; | |
1159 | } | |
1160 | end: | |
1161 | return ret; | |
1162 | } | |
1163 | ||
1164 | static | |
1165 | int save_ust_channel(struct config_writer *writer, | |
1166 | struct ltt_ust_channel *ust_chan, | |
1167 | struct ltt_ust_session *session) | |
1168 | { | |
1169 | int ret; | |
1170 | ||
1171 | assert(writer); | |
1172 | assert(ust_chan); | |
1173 | assert(session); | |
1174 | ||
1175 | ret = config_writer_open_element(writer, config_element_channel); | |
1176 | if (ret) { | |
1177 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1178 | goto end; | |
1179 | } | |
1180 | ||
1181 | ret = config_writer_write_element_string(writer, config_element_name, | |
1182 | ust_chan->name); | |
1183 | if (ret) { | |
1184 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1185 | goto end; | |
1186 | } | |
1187 | ||
1188 | ret = config_writer_write_element_bool(writer, config_element_enabled, | |
1189 | ust_chan->enabled); | |
1190 | if (ret) { | |
1191 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1192 | goto end; | |
1193 | } | |
1194 | ||
1195 | ret = save_ust_channel_attributes(writer, &ust_chan->attr); | |
1196 | if (ret) { | |
1197 | goto end; | |
1198 | } | |
1199 | ||
1200 | ret = config_writer_write_element_unsigned_int(writer, | |
1201 | config_element_tracefile_size, ust_chan->tracefile_size); | |
1202 | if (ret) { | |
1203 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1204 | goto end; | |
1205 | } | |
1206 | ||
1207 | ret = config_writer_write_element_unsigned_int(writer, | |
1208 | config_element_tracefile_count, ust_chan->tracefile_count); | |
1209 | if (ret) { | |
1210 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1211 | goto end; | |
1212 | } | |
1213 | ||
1214 | ret = config_writer_write_element_unsigned_int(writer, | |
1215 | config_element_live_timer_interval, | |
1216 | session->live_timer_interval); | |
1217 | if (ret) { | |
1218 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1219 | goto end; | |
1220 | } | |
1221 | ||
51755dc8 JG |
1222 | if (ust_chan->domain == LTTNG_DOMAIN_UST) { |
1223 | ret = save_ust_events(writer, ust_chan->events); | |
1224 | if (ret) { | |
1225 | goto end; | |
1226 | } | |
1227 | } else { | |
1228 | struct agent *agent = NULL; | |
1229 | ||
1230 | agent = trace_ust_find_agent(session, ust_chan->domain); | |
1231 | if (!agent) { | |
1232 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1233 | ERR("Could not find agent associated to UST subdomain"); | |
1234 | goto end; | |
1235 | } | |
1236 | ||
1237 | /* | |
1238 | * Channels associated with a UST sub-domain (such as JUL, Log4j | |
1239 | * or Python) don't have any non-internal events. We retrieve | |
1240 | * the "agent" events associated with this channel and serialize | |
1241 | * them. | |
1242 | */ | |
1243 | ret = save_agent_events(writer, ust_chan, agent); | |
1244 | if (ret) { | |
1245 | goto end; | |
1246 | } | |
fb198a11 JG |
1247 | } |
1248 | ||
1249 | ret = save_ust_context(writer, &ust_chan->ctx_list); | |
1250 | if (ret) { | |
1251 | goto end; | |
1252 | } | |
1253 | ||
1254 | /* /channel */ | |
1255 | ret = config_writer_close_element(writer); | |
1256 | if (ret) { | |
1257 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1258 | goto end; | |
1259 | } | |
1260 | end: | |
1261 | return ret; | |
1262 | } | |
1263 | ||
1264 | static | |
1265 | int save_kernel_session(struct config_writer *writer, | |
1266 | struct ltt_session *session) | |
1267 | { | |
1268 | int ret; | |
1269 | struct ltt_kernel_channel *kchan; | |
1270 | ||
1271 | assert(writer); | |
1272 | assert(session); | |
1273 | ||
1274 | ret = config_writer_write_element_string(writer, config_element_type, | |
1275 | config_domain_type_kernel); | |
1276 | if (ret) { | |
1277 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1278 | goto end; | |
1279 | } | |
1280 | ||
1281 | ret = config_writer_write_element_string(writer, | |
1282 | config_element_buffer_type, config_buffer_type_global); | |
1283 | if (ret) { | |
1284 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1285 | goto end; | |
1286 | } | |
1287 | ||
1288 | ret = config_writer_open_element(writer, | |
1289 | config_element_channels); | |
1290 | if (ret) { | |
1291 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1292 | goto end; | |
1293 | } | |
1294 | ||
1295 | cds_list_for_each_entry(kchan, &session->kernel_session->channel_list.head, | |
1296 | list) { | |
1297 | ret = save_kernel_channel(writer, kchan); | |
1298 | if (ret) { | |
1299 | goto end; | |
1300 | } | |
1301 | } | |
1302 | ||
1303 | /* /channels */ | |
1304 | ret = config_writer_close_element(writer); | |
1305 | if (ret) { | |
1306 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1307 | goto end; | |
1308 | } | |
1309 | end: | |
1310 | return ret; | |
1311 | } | |
1312 | ||
1313 | static | |
51755dc8 JG |
1314 | const char *get_config_domain_str(enum lttng_domain_type domain) |
1315 | { | |
1316 | const char *str_dom; | |
1317 | ||
1318 | switch (domain) { | |
1319 | case LTTNG_DOMAIN_KERNEL: | |
1320 | str_dom = config_domain_type_kernel; | |
1321 | break; | |
1322 | case LTTNG_DOMAIN_UST: | |
1323 | str_dom = config_domain_type_ust; | |
1324 | break; | |
1325 | case LTTNG_DOMAIN_JUL: | |
1326 | str_dom = config_domain_type_jul; | |
1327 | break; | |
1328 | case LTTNG_DOMAIN_LOG4J: | |
1329 | str_dom = config_domain_type_log4j; | |
1330 | break; | |
1331 | case LTTNG_DOMAIN_PYTHON: | |
1332 | str_dom = config_domain_type_python; | |
1333 | break; | |
1334 | default: | |
1335 | assert(0); | |
1336 | } | |
1337 | ||
1338 | return str_dom; | |
1339 | } | |
1340 | ||
e8fcabef JG |
1341 | static |
1342 | int save_pid_tracker(struct config_writer *writer, | |
1343 | struct ltt_session *sess, int domain) | |
1344 | { | |
1345 | int ret = 0; | |
1346 | ssize_t nr_pids = 0, i; | |
1347 | int32_t *pids = NULL; | |
1348 | ||
1349 | switch (domain) { | |
1350 | case LTTNG_DOMAIN_KERNEL: | |
1351 | { | |
1352 | nr_pids = kernel_list_tracker_pids(sess->kernel_session, &pids); | |
1353 | if (nr_pids < 0) { | |
1354 | ret = LTTNG_ERR_KERN_LIST_FAIL; | |
1355 | goto end; | |
1356 | } | |
1357 | break; | |
1358 | } | |
1359 | case LTTNG_DOMAIN_UST: | |
1360 | { | |
1361 | nr_pids = trace_ust_list_tracker_pids(sess->ust_session, &pids); | |
1362 | if (nr_pids < 0) { | |
1363 | ret = LTTNG_ERR_UST_LIST_FAIL; | |
1364 | goto end; | |
1365 | } | |
1366 | break; | |
1367 | } | |
1368 | case LTTNG_DOMAIN_JUL: | |
1369 | case LTTNG_DOMAIN_LOG4J: | |
1370 | case LTTNG_DOMAIN_PYTHON: | |
1371 | default: | |
1372 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; | |
1373 | goto end; | |
1374 | } | |
1375 | ||
1376 | /* Only create a pid_tracker if enabled or untrack all */ | |
1377 | if (nr_pids != 1 || (nr_pids == 1 && pids[0] != -1)) { | |
1378 | ret = config_writer_open_element(writer, | |
1379 | config_element_pid_tracker); | |
1380 | if (ret) { | |
1381 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1382 | goto end; | |
1383 | } | |
1384 | ||
1385 | ret = config_writer_open_element(writer, | |
1386 | config_element_targets); | |
1387 | if (ret) { | |
1388 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1389 | goto end; | |
1390 | } | |
1391 | ||
1392 | for (i = 0; i < nr_pids; i++) { | |
1393 | ret = config_writer_open_element(writer, | |
1394 | config_element_target_pid); | |
1395 | if (ret) { | |
1396 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1397 | goto end; | |
1398 | } | |
1399 | ||
1400 | ret = config_writer_write_element_unsigned_int(writer, | |
1401 | config_element_pid, pids[i]); | |
1402 | if (ret) { | |
1403 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1404 | goto end; | |
1405 | } | |
1406 | ||
1407 | /* /pid_target */ | |
1408 | ret = config_writer_close_element(writer); | |
1409 | if (ret) { | |
1410 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1411 | goto end; | |
1412 | } | |
1413 | } | |
1414 | ||
1415 | /* /targets */ | |
1416 | ret = config_writer_close_element(writer); | |
1417 | if (ret) { | |
1418 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1419 | goto end; | |
1420 | } | |
1421 | ||
1422 | /* /pid_tracker */ | |
1423 | ret = config_writer_close_element(writer); | |
1424 | if (ret) { | |
1425 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1426 | goto end; | |
1427 | } | |
1428 | } | |
1429 | end: | |
1430 | free(pids); | |
1431 | return ret; | |
1432 | } | |
1433 | ||
51755dc8 JG |
1434 | static |
1435 | int save_ust_domain(struct config_writer *writer, | |
1436 | struct ltt_session *session, enum lttng_domain_type domain) | |
fb198a11 JG |
1437 | { |
1438 | int ret; | |
1439 | struct ltt_ust_channel *ust_chan; | |
1440 | const char *buffer_type_string; | |
1441 | struct lttng_ht_node_str *node; | |
1442 | struct lttng_ht_iter iter; | |
51755dc8 | 1443 | const char *config_domain_name; |
fb198a11 JG |
1444 | |
1445 | assert(writer); | |
1446 | assert(session); | |
1447 | ||
51755dc8 JG |
1448 | ret = config_writer_open_element(writer, |
1449 | config_element_domain); | |
1450 | if (ret) { | |
1451 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1452 | goto end; | |
1453 | } | |
1454 | ||
1455 | config_domain_name = get_config_domain_str(domain); | |
1456 | if (!config_domain_name) { | |
1457 | ret = LTTNG_ERR_INVALID; | |
1458 | goto end; | |
1459 | } | |
1460 | ||
1461 | ret = config_writer_write_element_string(writer, | |
1462 | config_element_type, config_domain_name); | |
fb198a11 JG |
1463 | if (ret) { |
1464 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1465 | goto end; | |
1466 | } | |
1467 | ||
1468 | buffer_type_string = get_buffer_type_string( | |
1469 | session->ust_session->buffer_type); | |
1470 | if (!buffer_type_string) { | |
1471 | ERR("Unsupported buffer type."); | |
1472 | ret = LTTNG_ERR_INVALID; | |
1473 | goto end; | |
1474 | } | |
1475 | ||
1476 | ret = config_writer_write_element_string(writer, | |
1477 | config_element_buffer_type, buffer_type_string); | |
1478 | if (ret) { | |
1479 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1480 | goto end; | |
1481 | } | |
1482 | ||
1483 | ret = config_writer_open_element(writer, config_element_channels); | |
1484 | if (ret) { | |
1485 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1486 | goto end; | |
1487 | } | |
1488 | ||
1489 | rcu_read_lock(); | |
1490 | cds_lfht_for_each_entry(session->ust_session->domain_global.channels->ht, | |
1491 | &iter.iter, node, node) { | |
fb198a11 | 1492 | ust_chan = caa_container_of(node, struct ltt_ust_channel, node); |
51755dc8 | 1493 | if (domain == ust_chan->domain) { |
fb198a11 JG |
1494 | ret = save_ust_channel(writer, ust_chan, session->ust_session); |
1495 | if (ret) { | |
1496 | rcu_read_unlock(); | |
1497 | goto end; | |
1498 | } | |
1499 | } | |
1500 | } | |
1501 | rcu_read_unlock(); | |
1502 | ||
1503 | /* /channels */ | |
1504 | ret = config_writer_close_element(writer); | |
1505 | if (ret) { | |
1506 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1507 | goto end; | |
1508 | } | |
51755dc8 | 1509 | |
e8fcabef | 1510 | if (domain == LTTNG_DOMAIN_UST) { |
847a5916 | 1511 | ret = config_writer_open_element(writer, |
e8fcabef | 1512 | config_element_trackers); |
847a5916 JR |
1513 | if (ret) { |
1514 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1515 | goto end; | |
1516 | } | |
1517 | ||
e8fcabef | 1518 | ret = save_pid_tracker(writer, session, LTTNG_DOMAIN_UST); |
847a5916 | 1519 | if (ret) { |
847a5916 JR |
1520 | goto end; |
1521 | } | |
1522 | ||
e8fcabef | 1523 | /* /trackers */ |
847a5916 JR |
1524 | ret = config_writer_close_element(writer); |
1525 | if (ret) { | |
847a5916 JR |
1526 | goto end; |
1527 | } | |
e8fcabef | 1528 | } |
847a5916 | 1529 | |
e8fcabef JG |
1530 | /* /domain */ |
1531 | ret = config_writer_close_element(writer); | |
1532 | if (ret) { | |
1533 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1534 | goto end; | |
847a5916 | 1535 | } |
e8fcabef | 1536 | |
847a5916 | 1537 | end: |
847a5916 JR |
1538 | return ret; |
1539 | } | |
1540 | ||
fb198a11 JG |
1541 | static |
1542 | int save_domains(struct config_writer *writer, struct ltt_session *session) | |
1543 | { | |
1544 | int ret = 0; | |
1545 | ||
1546 | assert(writer); | |
1547 | assert(session); | |
1548 | ||
1549 | if (!session->kernel_session && !session->ust_session) { | |
1550 | goto end; | |
1551 | } | |
1552 | ||
1553 | ret = config_writer_open_element(writer, config_element_domains); | |
1554 | if (ret) { | |
1555 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1556 | goto end; | |
1557 | } | |
1558 | ||
1559 | ||
1560 | if (session->kernel_session) { | |
1561 | ret = config_writer_open_element(writer, | |
1562 | config_element_domain); | |
1563 | if (ret) { | |
1564 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1565 | goto end; | |
1566 | } | |
1567 | ||
1568 | ret = save_kernel_session(writer, session); | |
1569 | if (ret) { | |
1570 | goto end; | |
1571 | } | |
1572 | ||
847a5916 JR |
1573 | ret = config_writer_open_element(writer, |
1574 | config_element_trackers); | |
1575 | if (ret) { | |
1576 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1577 | goto end; | |
1578 | } | |
1579 | ||
1580 | ret = save_pid_tracker(writer, session, LTTNG_DOMAIN_KERNEL); | |
1581 | if (ret) { | |
1582 | goto end; | |
1583 | } | |
1584 | ||
1585 | /* /trackers */ | |
1586 | ret = config_writer_close_element(writer); | |
1587 | if (ret) { | |
1588 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1589 | goto end; | |
1590 | } | |
fb198a11 JG |
1591 | /* /domain */ |
1592 | ret = config_writer_close_element(writer); | |
1593 | if (ret) { | |
1594 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1595 | goto end; | |
1596 | } | |
1597 | } | |
1598 | ||
1599 | if (session->ust_session) { | |
51755dc8 | 1600 | ret = save_ust_domain(writer, session, LTTNG_DOMAIN_UST); |
fb198a11 JG |
1601 | if (ret) { |
1602 | goto end; | |
1603 | } | |
1604 | ||
51755dc8 | 1605 | ret = save_ust_domain(writer, session, LTTNG_DOMAIN_JUL); |
fb198a11 | 1606 | if (ret) { |
fb198a11 JG |
1607 | goto end; |
1608 | } | |
fb198a11 | 1609 | |
51755dc8 JG |
1610 | ret = save_ust_domain(writer, session, LTTNG_DOMAIN_LOG4J); |
1611 | if (ret) { | |
1612 | goto end; | |
1613 | } | |
65d72c41 | 1614 | |
51755dc8 JG |
1615 | ret = save_ust_domain(writer, session, LTTNG_DOMAIN_PYTHON); |
1616 | if (ret) { | |
1617 | goto end; | |
fb198a11 JG |
1618 | } |
1619 | } | |
1620 | ||
1621 | /* /domains */ | |
1622 | ret = config_writer_close_element(writer); | |
1623 | if (ret) { | |
1624 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1625 | goto end; | |
1626 | } | |
1627 | end: | |
1628 | return ret; | |
1629 | } | |
1630 | ||
1631 | static | |
1632 | int save_consumer_output(struct config_writer *writer, | |
1633 | struct consumer_output *output) | |
1634 | { | |
1635 | int ret; | |
1636 | ||
1637 | assert(writer); | |
1638 | assert(output); | |
1639 | ||
1640 | ret = config_writer_open_element(writer, config_element_consumer_output); | |
1641 | if (ret) { | |
1642 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1643 | goto end; | |
1644 | } | |
1645 | ||
1646 | ret = config_writer_write_element_bool(writer, config_element_enabled, | |
1647 | output->enabled); | |
1648 | if (ret) { | |
1649 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1650 | goto end; | |
1651 | } | |
1652 | ||
1653 | ret = config_writer_open_element(writer, config_element_destination); | |
1654 | if (ret) { | |
1655 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1656 | goto end; | |
1657 | } | |
1658 | ||
1659 | switch (output->type) { | |
1660 | case CONSUMER_DST_LOCAL: | |
1661 | ret = config_writer_write_element_string(writer, | |
1662 | config_element_path, output->dst.trace_path); | |
1663 | if (ret) { | |
1664 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1665 | goto end; | |
1666 | } | |
1667 | break; | |
1668 | case CONSUMER_DST_NET: | |
1669 | { | |
1670 | char *uri; | |
1671 | ||
1672 | uri = zmalloc(PATH_MAX); | |
1673 | if (!uri) { | |
1674 | ret = LTTNG_ERR_NOMEM; | |
1675 | goto end; | |
1676 | } | |
1677 | ||
1678 | ret = config_writer_open_element(writer, config_element_net_output); | |
1679 | if (ret) { | |
1680 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1681 | goto end_net_output; | |
1682 | } | |
1683 | ||
1684 | if (output->dst.net.control_isset && | |
1685 | output->dst.net.data_isset) { | |
1686 | ret = uri_to_str_url(&output->dst.net.control, uri, PATH_MAX); | |
1687 | if (ret < 0) { | |
1688 | ret = LTTNG_ERR_INVALID; | |
1689 | goto end_net_output; | |
1690 | } | |
1691 | ||
1692 | ret = config_writer_write_element_string(writer, | |
1693 | config_element_control_uri, uri); | |
1694 | if (ret) { | |
1695 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1696 | goto end_net_output; | |
1697 | } | |
1698 | ||
1699 | ret = uri_to_str_url(&output->dst.net.data, uri, PATH_MAX); | |
1700 | if (ret < 0) { | |
1701 | ret = LTTNG_ERR_INVALID; | |
1702 | goto end_net_output; | |
1703 | } | |
1704 | ||
1705 | ret = config_writer_write_element_string(writer, | |
1706 | config_element_data_uri, uri); | |
1707 | if (ret) { | |
1708 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1709 | goto end_net_output; | |
1710 | } | |
1711 | ||
1712 | end_net_output: | |
1713 | free(uri); | |
1714 | if (ret) { | |
1715 | goto end; | |
1716 | } | |
1717 | } else { | |
1718 | ret = !output->dst.net.control_isset ? | |
1719 | LTTNG_ERR_URL_CTRL_MISS : | |
1720 | LTTNG_ERR_URL_DATA_MISS; | |
c39270e5 | 1721 | free(uri); |
fb198a11 JG |
1722 | goto end; |
1723 | } | |
1724 | ||
1725 | ret = config_writer_close_element(writer); | |
1726 | if (ret) { | |
1727 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1728 | goto end; | |
1729 | } | |
1730 | break; | |
1731 | } | |
1732 | default: | |
1733 | ERR("Unsupported consumer output type."); | |
1734 | ret = LTTNG_ERR_INVALID; | |
1735 | goto end; | |
1736 | } | |
1737 | ||
1738 | /* /destination */ | |
1739 | ret = config_writer_close_element(writer); | |
1740 | if (ret) { | |
1741 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1742 | goto end; | |
1743 | } | |
1744 | ||
1745 | /* /consumer_output */ | |
1746 | ret = config_writer_close_element(writer); | |
1747 | if (ret) { | |
1748 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1749 | goto end; | |
1750 | } | |
1751 | end: | |
1752 | return ret; | |
1753 | } | |
1754 | ||
1755 | static | |
1756 | int save_snapshot_outputs(struct config_writer *writer, | |
1757 | struct snapshot *snapshot) | |
1758 | { | |
1759 | int ret; | |
1760 | struct lttng_ht_iter iter; | |
1761 | struct snapshot_output *output; | |
1762 | ||
1763 | assert(writer); | |
1764 | assert(snapshot); | |
1765 | ||
1766 | ret = config_writer_open_element(writer, config_element_snapshot_outputs); | |
1767 | if (ret) { | |
1768 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1769 | goto end; | |
1770 | } | |
1771 | ||
1772 | rcu_read_lock(); | |
1773 | cds_lfht_for_each_entry(snapshot->output_ht->ht, &iter.iter, output, | |
1774 | node.node) { | |
1775 | ret = config_writer_open_element(writer, | |
1776 | config_element_output); | |
1777 | if (ret) { | |
1778 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1779 | goto end_unlock; | |
1780 | } | |
1781 | ||
1782 | ret = config_writer_write_element_string(writer, | |
1783 | config_element_name, output->name); | |
1784 | if (ret) { | |
1785 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1786 | goto end_unlock; | |
1787 | } | |
1788 | ||
1789 | ret = config_writer_write_element_unsigned_int(writer, | |
1790 | config_element_max_size, output->max_size); | |
1791 | if (ret) { | |
1792 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1793 | goto end_unlock; | |
1794 | } | |
1795 | ||
1796 | ret = save_consumer_output(writer, output->consumer); | |
1797 | if (ret) { | |
1798 | goto end_unlock; | |
1799 | } | |
1800 | ||
1801 | /* /output */ | |
1802 | ret = config_writer_close_element(writer); | |
1803 | if (ret) { | |
1804 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1805 | goto end_unlock; | |
1806 | } | |
1807 | } | |
1808 | rcu_read_unlock(); | |
1809 | ||
1810 | /* /snapshot_outputs */ | |
1811 | ret = config_writer_close_element(writer); | |
1812 | if (ret) { | |
1813 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1814 | goto end; | |
1815 | } | |
1816 | ||
1817 | end: | |
1818 | return ret; | |
1819 | end_unlock: | |
1820 | rcu_read_unlock(); | |
1821 | return ret; | |
1822 | } | |
1823 | ||
1824 | static | |
1825 | int save_session_output(struct config_writer *writer, | |
1826 | struct ltt_session *session) | |
1827 | { | |
1828 | int ret; | |
1829 | ||
1830 | assert(writer); | |
1831 | assert(session); | |
1832 | ||
1833 | if ((session->snapshot_mode && session->snapshot.nb_output == 0) || | |
1834 | (!session->snapshot_mode && !session->consumer)) { | |
1835 | /* Session is in no output mode */ | |
1836 | ret = 0; | |
1837 | goto end; | |
1838 | } | |
1839 | ||
1840 | ret = config_writer_open_element(writer, config_element_output); | |
1841 | if (ret) { | |
1842 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1843 | goto end; | |
1844 | } | |
1845 | ||
1846 | if (session->snapshot_mode) { | |
1847 | ret = save_snapshot_outputs(writer, &session->snapshot); | |
1848 | if (ret) { | |
1849 | goto end; | |
1850 | } | |
1851 | } else { | |
1852 | if (session->consumer) { | |
1853 | ret = save_consumer_output(writer, session->consumer); | |
1854 | if (ret) { | |
1855 | goto end; | |
1856 | } | |
1857 | } | |
1858 | } | |
1859 | ||
1860 | /* /output */ | |
1861 | ret = config_writer_close_element(writer); | |
1862 | if (ret) { | |
1863 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1864 | goto end; | |
1865 | } | |
1866 | end: | |
1867 | return ret; | |
1868 | } | |
1869 | ||
1870 | /* | |
1871 | * Save the given session. | |
1872 | * | |
1873 | * Return 0 on success else a LTTNG_ERR* code. | |
1874 | */ | |
1875 | static | |
1876 | int save_session(struct ltt_session *session, | |
1877 | struct lttng_save_session_attr *attr, lttng_sock_cred *creds) | |
1878 | { | |
1879 | int ret, fd; | |
db471218 | 1880 | unsigned int file_opened = 0; /* Indicate if the file has been opened */ |
fb198a11 JG |
1881 | char config_file_path[PATH_MAX]; |
1882 | size_t len; | |
1883 | struct config_writer *writer = NULL; | |
1884 | size_t session_name_len; | |
1885 | const char *provided_path; | |
1886 | ||
1887 | assert(session); | |
1888 | assert(attr); | |
1889 | assert(creds); | |
1890 | ||
1891 | session_name_len = strlen(session->name); | |
95a29ab8 | 1892 | memset(config_file_path, 0, sizeof(config_file_path)); |
fb198a11 JG |
1893 | |
1894 | if (!session_access_ok(session, | |
1895 | LTTNG_SOCK_GET_UID_CRED(creds), | |
1896 | LTTNG_SOCK_GET_GID_CRED(creds))) { | |
1897 | ret = LTTNG_ERR_EPERM; | |
1898 | goto end; | |
1899 | } | |
1900 | ||
1901 | provided_path = lttng_save_session_attr_get_output_url(attr); | |
1902 | if (provided_path) { | |
95a29ab8 | 1903 | DBG3("Save session in provided path %s", provided_path); |
fb198a11 | 1904 | len = strlen(provided_path); |
d2992717 | 1905 | if (len >= sizeof(config_file_path)) { |
fb198a11 JG |
1906 | ret = LTTNG_ERR_SET_URL; |
1907 | goto end; | |
1908 | } | |
1909 | strncpy(config_file_path, provided_path, len); | |
1910 | } else { | |
7e078ad1 | 1911 | ssize_t ret_len; |
fb198a11 JG |
1912 | char *home_dir = utils_get_user_home_dir( |
1913 | LTTNG_SOCK_GET_UID_CRED(creds)); | |
1914 | if (!home_dir) { | |
1915 | ret = LTTNG_ERR_SET_URL; | |
1916 | goto end; | |
1917 | } | |
1918 | ||
d2992717 | 1919 | ret_len = snprintf(config_file_path, sizeof(config_file_path), |
fb198a11 JG |
1920 | DEFAULT_SESSION_HOME_CONFIGPATH, home_dir); |
1921 | free(home_dir); | |
7e078ad1 | 1922 | if (ret_len < 0) { |
fb198a11 JG |
1923 | PERROR("snprintf save session"); |
1924 | ret = LTTNG_ERR_SET_URL; | |
1925 | goto end; | |
1926 | } | |
7e078ad1 | 1927 | len = ret_len; |
fb198a11 JG |
1928 | } |
1929 | ||
1930 | /* | |
d2992717 DG |
1931 | * Check the path fits in the config file path dst including the '/' |
1932 | * followed by trailing .lttng extension and the NULL terminated string. | |
fb198a11 | 1933 | */ |
d2992717 DG |
1934 | if ((len + session_name_len + 2 + |
1935 | sizeof(DEFAULT_SESSION_CONFIG_FILE_EXTENSION)) | |
1936 | > sizeof(config_file_path)) { | |
fb198a11 JG |
1937 | ret = LTTNG_ERR_SET_URL; |
1938 | goto end; | |
1939 | } | |
1940 | ||
1941 | ret = run_as_mkdir_recursive(config_file_path, S_IRWXU | S_IRWXG, | |
1942 | LTTNG_SOCK_GET_UID_CRED(creds), LTTNG_SOCK_GET_GID_CRED(creds)); | |
1943 | if (ret) { | |
1944 | ret = LTTNG_ERR_SET_URL; | |
1945 | goto end; | |
1946 | } | |
1947 | ||
d2992717 DG |
1948 | /* |
1949 | * At this point, we know that everything fits in the buffer. Validation | |
1950 | * was done just above. | |
1951 | */ | |
fb198a11 JG |
1952 | config_file_path[len++] = '/'; |
1953 | strncpy(config_file_path + len, session->name, session_name_len); | |
1954 | len += session_name_len; | |
1955 | strcpy(config_file_path + len, DEFAULT_SESSION_CONFIG_FILE_EXTENSION); | |
95a29ab8 DG |
1956 | len += sizeof(DEFAULT_SESSION_CONFIG_FILE_EXTENSION); |
1957 | config_file_path[len] = '\0'; | |
fb198a11 JG |
1958 | |
1959 | if (!access(config_file_path, F_OK) && !attr->overwrite) { | |
f9b57ab2 DG |
1960 | /* File exists, notify the user since the overwrite flag is off. */ |
1961 | ret = LTTNG_ERR_SAVE_FILE_EXIST; | |
fb198a11 JG |
1962 | goto end; |
1963 | } | |
1964 | ||
1965 | fd = run_as_open(config_file_path, O_CREAT | O_WRONLY | O_TRUNC, | |
1966 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP, | |
1967 | LTTNG_SOCK_GET_UID_CRED(creds), LTTNG_SOCK_GET_GID_CRED(creds)); | |
1968 | if (fd < 0) { | |
1969 | PERROR("Could not create configuration file"); | |
1970 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1971 | goto end; | |
1972 | } | |
db471218 | 1973 | file_opened = 1; |
fb198a11 | 1974 | |
705bb62f | 1975 | writer = config_writer_create(fd, 1); |
fb198a11 JG |
1976 | if (!writer) { |
1977 | ret = LTTNG_ERR_NOMEM; | |
1978 | goto end; | |
1979 | } | |
1980 | ||
1981 | ret = config_writer_open_element(writer, config_element_sessions); | |
1982 | if (ret) { | |
1983 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1984 | goto end; | |
1985 | } | |
1986 | ||
1987 | ret = config_writer_open_element(writer, config_element_session); | |
1988 | if (ret) { | |
1989 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1990 | goto end; | |
1991 | } | |
1992 | ||
1993 | ret = config_writer_write_element_string(writer, config_element_name, | |
1994 | session->name); | |
1995 | if (ret) { | |
1996 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1997 | goto end; | |
1998 | } | |
1999 | ||
9e7c9f56 JR |
2000 | if(session->shm_path[0] != '\0') { |
2001 | ret = config_writer_write_element_string(writer, | |
2002 | config_element_shared_memory_path, | |
2003 | session->shm_path); | |
2004 | if (ret) { | |
2005 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2006 | goto end; | |
2007 | } | |
2008 | } | |
2009 | ||
fb198a11 JG |
2010 | ret = save_domains(writer, session); |
2011 | if (ret) { | |
2012 | goto end; | |
2013 | } | |
2014 | ||
2015 | ret = config_writer_write_element_bool(writer, config_element_started, | |
8382cf6f | 2016 | session->active); |
fb198a11 JG |
2017 | if (ret) { |
2018 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2019 | goto end; | |
2020 | } | |
2021 | ||
2022 | if (session->snapshot_mode || session->live_timer) { | |
2023 | ret = config_writer_open_element(writer, config_element_attributes); | |
2024 | if (ret) { | |
2025 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2026 | goto end; | |
2027 | } | |
2028 | ||
2029 | if (session->snapshot_mode) { | |
2030 | ret = config_writer_write_element_bool(writer, | |
2031 | config_element_snapshot_mode, 1); | |
2032 | if (ret) { | |
2033 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2034 | goto end; | |
2035 | } | |
2036 | } else { | |
d98ad589 | 2037 | ret = config_writer_write_element_unsigned_int(writer, |
fb198a11 JG |
2038 | config_element_live_timer_interval, session->live_timer); |
2039 | if (ret) { | |
2040 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2041 | goto end; | |
2042 | } | |
2043 | } | |
2044 | ||
2045 | /* /attributes */ | |
2046 | ret = config_writer_close_element(writer); | |
2047 | if (ret) { | |
2048 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2049 | goto end; | |
2050 | } | |
2051 | } | |
2052 | ||
2053 | ret = save_session_output(writer, session); | |
2054 | if (ret) { | |
2055 | goto end; | |
2056 | } | |
2057 | ||
2058 | /* /session */ | |
2059 | ret = config_writer_close_element(writer); | |
2060 | if (ret) { | |
2061 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2062 | goto end; | |
2063 | } | |
2064 | ||
2065 | /* /sessions */ | |
2066 | ret = config_writer_close_element(writer); | |
2067 | if (ret) { | |
2068 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2069 | goto end; | |
2070 | } | |
2071 | end: | |
2072 | if (writer && config_writer_destroy(writer)) { | |
2073 | /* Preserve the original error code */ | |
2074 | ret = ret ? ret : LTTNG_ERR_SAVE_IO_FAIL; | |
2075 | } | |
2076 | if (ret) { | |
2077 | /* Delete file in case of error */ | |
db471218 | 2078 | if (file_opened && unlink(config_file_path)) { |
fb198a11 JG |
2079 | PERROR("Unlinking XML session configuration."); |
2080 | } | |
2081 | } | |
2082 | ||
1d12100d JR |
2083 | if (file_opened) { |
2084 | ret = close(fd); | |
2085 | if (ret) { | |
2086 | PERROR("Closing XML session configuration"); | |
2087 | } | |
2088 | } | |
2089 | ||
fb198a11 JG |
2090 | return ret; |
2091 | } | |
2092 | ||
2093 | int cmd_save_sessions(struct lttng_save_session_attr *attr, | |
2094 | lttng_sock_cred *creds) | |
2095 | { | |
2096 | int ret; | |
2097 | const char *session_name; | |
2098 | struct ltt_session *session; | |
2099 | ||
2100 | session_lock_list(); | |
2101 | ||
2102 | session_name = lttng_save_session_attr_get_session_name(attr); | |
2103 | if (session_name) { | |
2104 | session = session_find_by_name(session_name); | |
2105 | if (!session) { | |
2106 | ret = LTTNG_ERR_SESS_NOT_FOUND; | |
2107 | goto end; | |
2108 | } | |
2109 | ||
2110 | session_lock(session); | |
2111 | ret = save_session(session, attr, creds); | |
2112 | session_unlock(session); | |
2113 | if (ret) { | |
2114 | goto end; | |
2115 | } | |
2116 | } else { | |
2117 | struct ltt_session_list *list = session_get_list(); | |
2118 | ||
2119 | cds_list_for_each_entry(session, &list->head, list) { | |
2120 | session_lock(session); | |
2121 | ret = save_session(session, attr, creds); | |
2122 | session_unlock(session); | |
2123 | ||
2124 | /* Don't abort if we don't have the required permissions. */ | |
2125 | if (ret && ret != LTTNG_ERR_EPERM) { | |
2126 | goto end; | |
2127 | } | |
2128 | } | |
2129 | } | |
2130 | ret = LTTNG_OK; | |
2131 | ||
2132 | end: | |
2133 | session_unlock_list(); | |
2134 | return ret; | |
2135 | } |