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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" | |
0dbc2034 | 35 | #include "lttng-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 | } | |
275472aa JR |
118 | |
119 | ret = config_writer_write_element_signed_int(writer, | |
120 | config_element_blocking_timeout, | |
121 | ext->blocking_timeout); | |
122 | if (ret) { | |
123 | goto end; | |
124 | } | |
4fc2b126 JR |
125 | } |
126 | ||
fb198a11 JG |
127 | end: |
128 | return ret ? LTTNG_ERR_SAVE_IO_FAIL : 0; | |
129 | } | |
130 | ||
131 | static | |
132 | int save_ust_channel_attributes(struct config_writer *writer, | |
133 | struct lttng_ust_channel_attr *attr) | |
134 | { | |
135 | int ret; | |
4fc2b126 | 136 | struct ltt_ust_channel *channel = NULL; |
fb198a11 JG |
137 | |
138 | ret = config_writer_write_element_string(writer, | |
139 | config_element_overwrite_mode, | |
140 | attr->overwrite ? config_overwrite_mode_overwrite : | |
141 | config_overwrite_mode_discard); | |
142 | if (ret) { | |
143 | goto end; | |
144 | } | |
145 | ||
146 | ret = config_writer_write_element_unsigned_int(writer, | |
147 | config_element_subbuf_size, attr->subbuf_size); | |
148 | if (ret) { | |
149 | goto end; | |
150 | } | |
151 | ||
152 | ret = config_writer_write_element_unsigned_int(writer, | |
153 | config_element_num_subbuf, | |
154 | attr->num_subbuf); | |
155 | if (ret) { | |
156 | goto end; | |
157 | } | |
158 | ||
159 | ret = config_writer_write_element_unsigned_int(writer, | |
160 | config_element_switch_timer_interval, | |
161 | attr->switch_timer_interval); | |
162 | if (ret) { | |
163 | goto end; | |
164 | } | |
165 | ||
166 | ret = config_writer_write_element_unsigned_int(writer, | |
167 | config_element_read_timer_interval, | |
168 | attr->read_timer_interval); | |
169 | if (ret) { | |
170 | goto end; | |
171 | } | |
172 | ||
173 | ret = config_writer_write_element_string(writer, | |
174 | config_element_output_type, | |
175 | attr->output == LTTNG_UST_MMAP ? | |
176 | config_output_type_mmap : config_output_type_splice); | |
177 | if (ret) { | |
178 | goto end; | |
179 | } | |
4fc2b126 | 180 | |
275472aa JR |
181 | ret = config_writer_write_element_signed_int(writer, |
182 | config_element_blocking_timeout, | |
183 | attr->u.s.blocking_timeout); | |
184 | if (ret) { | |
185 | goto end; | |
186 | } | |
187 | ||
4fc2b126 JR |
188 | /* |
189 | * Fetch the monitor timer which is located in the parent of | |
190 | * lttng_ust_channel_attr | |
191 | */ | |
192 | channel = caa_container_of(attr, struct ltt_ust_channel, attr); | |
193 | ret = config_writer_write_element_unsigned_int(writer, | |
194 | config_element_monitor_timer_interval, | |
195 | channel->monitor_timer_interval); | |
196 | if (ret) { | |
197 | goto end; | |
198 | } | |
199 | ||
fb198a11 JG |
200 | end: |
201 | return ret ? LTTNG_ERR_SAVE_IO_FAIL : 0; | |
202 | } | |
203 | ||
204 | static | |
205 | const char *get_kernel_instrumentation_string( | |
206 | enum lttng_kernel_instrumentation instrumentation) | |
207 | { | |
208 | const char *instrumentation_string; | |
209 | ||
210 | switch (instrumentation) { | |
211 | case LTTNG_KERNEL_ALL: | |
212 | instrumentation_string = config_event_type_all; | |
213 | break; | |
214 | case LTTNG_KERNEL_TRACEPOINT: | |
215 | instrumentation_string = config_event_type_tracepoint; | |
216 | break; | |
217 | case LTTNG_KERNEL_KPROBE: | |
9d82c4c2 | 218 | instrumentation_string = config_event_type_probe; |
fb198a11 | 219 | break; |
c1e83fb4 FD |
220 | case LTTNG_KERNEL_UPROBE: |
221 | instrumentation_string = config_event_type_userspace_probe; | |
222 | break; | |
fb198a11 | 223 | case LTTNG_KERNEL_FUNCTION: |
9d82c4c2 | 224 | instrumentation_string = config_event_type_function_entry; |
fb198a11 JG |
225 | break; |
226 | case LTTNG_KERNEL_KRETPROBE: | |
9d82c4c2 | 227 | instrumentation_string = config_event_type_function; |
fb198a11 JG |
228 | break; |
229 | case LTTNG_KERNEL_NOOP: | |
230 | instrumentation_string = config_event_type_noop; | |
231 | break; | |
232 | case LTTNG_KERNEL_SYSCALL: | |
233 | instrumentation_string = config_event_type_syscall; | |
234 | break; | |
235 | default: | |
236 | instrumentation_string = NULL; | |
237 | } | |
238 | ||
239 | return instrumentation_string; | |
240 | } | |
241 | ||
242 | static | |
243 | const char *get_kernel_context_type_string( | |
244 | enum lttng_kernel_context_type context_type) | |
245 | { | |
246 | const char *context_type_string; | |
247 | ||
248 | switch (context_type) { | |
249 | case LTTNG_KERNEL_CONTEXT_PID: | |
250 | context_type_string = config_event_context_pid; | |
251 | break; | |
252 | case LTTNG_KERNEL_CONTEXT_PROCNAME: | |
253 | context_type_string = config_event_context_procname; | |
254 | break; | |
255 | case LTTNG_KERNEL_CONTEXT_PRIO: | |
256 | context_type_string = config_event_context_prio; | |
257 | break; | |
258 | case LTTNG_KERNEL_CONTEXT_NICE: | |
259 | context_type_string = config_event_context_nice; | |
260 | break; | |
261 | case LTTNG_KERNEL_CONTEXT_VPID: | |
262 | context_type_string = config_event_context_vpid; | |
263 | break; | |
264 | case LTTNG_KERNEL_CONTEXT_TID: | |
265 | context_type_string = config_event_context_tid; | |
266 | break; | |
267 | case LTTNG_KERNEL_CONTEXT_VTID: | |
268 | context_type_string = config_event_context_vtid; | |
269 | break; | |
270 | case LTTNG_KERNEL_CONTEXT_PPID: | |
271 | context_type_string = config_event_context_ppid; | |
272 | break; | |
273 | case LTTNG_KERNEL_CONTEXT_VPPID: | |
274 | context_type_string = config_event_context_vppid; | |
275 | break; | |
276 | case LTTNG_KERNEL_CONTEXT_HOSTNAME: | |
277 | context_type_string = config_event_context_hostname; | |
278 | break; | |
1ae5e83e JD |
279 | case LTTNG_KERNEL_CONTEXT_INTERRUPTIBLE: |
280 | context_type_string = config_event_context_interruptible; | |
281 | break; | |
282 | case LTTNG_KERNEL_CONTEXT_PREEMPTIBLE: | |
283 | context_type_string = config_event_context_preemptible; | |
284 | break; | |
285 | case LTTNG_KERNEL_CONTEXT_NEED_RESCHEDULE: | |
286 | context_type_string = config_event_context_need_reschedule; | |
287 | break; | |
288 | case LTTNG_KERNEL_CONTEXT_MIGRATABLE: | |
289 | context_type_string = config_event_context_migratable; | |
290 | break; | |
16c4c991 FD |
291 | case LTTNG_KERNEL_CONTEXT_CALLSTACK_USER: |
292 | context_type_string = config_event_context_callstack_user; | |
293 | break; | |
294 | case LTTNG_KERNEL_CONTEXT_CALLSTACK_KERNEL: | |
295 | context_type_string = config_event_context_callstack_kernel; | |
296 | break; | |
40e14884 MJ |
297 | case LTTNG_KERNEL_CONTEXT_CGROUP_NS: |
298 | context_type_string = config_event_context_cgroup_ns; | |
299 | break; | |
300 | case LTTNG_KERNEL_CONTEXT_IPC_NS: | |
301 | context_type_string = config_event_context_ipc_ns; | |
302 | break; | |
303 | case LTTNG_KERNEL_CONTEXT_MNT_NS: | |
304 | context_type_string = config_event_context_mnt_ns; | |
305 | break; | |
306 | case LTTNG_KERNEL_CONTEXT_NET_NS: | |
307 | context_type_string = config_event_context_net_ns; | |
308 | break; | |
309 | case LTTNG_KERNEL_CONTEXT_PID_NS: | |
310 | context_type_string = config_event_context_pid_ns; | |
311 | break; | |
312 | case LTTNG_KERNEL_CONTEXT_USER_NS: | |
313 | context_type_string = config_event_context_user_ns; | |
314 | break; | |
315 | case LTTNG_KERNEL_CONTEXT_UTS_NS: | |
316 | context_type_string = config_event_context_uts_ns; | |
317 | break; | |
fb198a11 JG |
318 | default: |
319 | context_type_string = NULL; | |
320 | } | |
321 | ||
322 | return context_type_string; | |
323 | } | |
324 | ||
325 | static | |
326 | const char *get_ust_context_type_string( | |
327 | enum lttng_ust_context_type context_type) | |
328 | { | |
329 | const char *context_type_string; | |
330 | ||
331 | switch (context_type) { | |
332 | case LTTNG_UST_CONTEXT_PROCNAME: | |
333 | context_type_string = config_event_context_procname; | |
334 | break; | |
335 | case LTTNG_UST_CONTEXT_VPID: | |
336 | context_type_string = config_event_context_vpid; | |
337 | break; | |
338 | case LTTNG_UST_CONTEXT_VTID: | |
339 | context_type_string = config_event_context_vtid; | |
340 | break; | |
341 | case LTTNG_UST_CONTEXT_IP: | |
342 | context_type_string = config_event_context_ip; | |
343 | break; | |
344 | case LTTNG_UST_CONTEXT_PTHREAD_ID: | |
345 | context_type_string = config_event_context_pthread_id; | |
346 | break; | |
045fc617 JG |
347 | case LTTNG_UST_CONTEXT_APP_CONTEXT: |
348 | context_type_string = config_event_context_app; | |
349 | break; | |
e885a367 | 350 | case LTTNG_UST_CONTEXT_PERF_THREAD_COUNTER: |
14ce5bd8 JG |
351 | /* |
352 | * Error, should not be stored in the XML, perf contexts | |
353 | * are stored as a node of type event_perf_context_type. | |
354 | */ | |
fb198a11 JG |
355 | default: |
356 | context_type_string = NULL; | |
e885a367 | 357 | break; |
fb198a11 JG |
358 | } |
359 | ||
360 | return context_type_string; | |
361 | } | |
362 | ||
363 | static | |
364 | const char *get_buffer_type_string( | |
365 | enum lttng_buffer_type buffer_type) | |
366 | { | |
367 | const char *buffer_type_string; | |
368 | ||
369 | switch (buffer_type) { | |
370 | case LTTNG_BUFFER_PER_PID: | |
371 | buffer_type_string = config_buffer_type_per_pid; | |
372 | break; | |
373 | case LTTNG_BUFFER_PER_UID: | |
374 | buffer_type_string = config_buffer_type_per_uid; | |
375 | break; | |
376 | case LTTNG_BUFFER_GLOBAL: | |
377 | buffer_type_string = config_buffer_type_global; | |
378 | break; | |
379 | default: | |
380 | buffer_type_string = NULL; | |
381 | } | |
382 | ||
383 | return buffer_type_string; | |
384 | } | |
385 | ||
386 | static | |
387 | const char *get_loglevel_type_string( | |
388 | enum lttng_ust_loglevel_type loglevel_type) | |
389 | { | |
390 | const char *loglevel_type_string; | |
391 | ||
392 | switch (loglevel_type) { | |
393 | case LTTNG_UST_LOGLEVEL_ALL: | |
394 | loglevel_type_string = config_loglevel_type_all; | |
395 | break; | |
396 | case LTTNG_UST_LOGLEVEL_RANGE: | |
397 | loglevel_type_string = config_loglevel_type_range; | |
398 | break; | |
399 | case LTTNG_UST_LOGLEVEL_SINGLE: | |
400 | loglevel_type_string = config_loglevel_type_single; | |
401 | break; | |
402 | default: | |
403 | loglevel_type_string = NULL; | |
404 | } | |
405 | ||
406 | return loglevel_type_string; | |
407 | } | |
408 | ||
409 | static | |
83712c39 FD |
410 | int save_kernel_function_event(struct config_writer *writer, |
411 | struct ltt_kernel_event *event) | |
412 | { | |
413 | int ret; | |
414 | ||
415 | ret = config_writer_open_element(writer, config_element_function_attributes); | |
416 | if (ret) { | |
417 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
418 | goto end; | |
419 | } | |
420 | ||
421 | ret = config_writer_write_element_string(writer, config_element_name, | |
422 | event->event->u.ftrace.symbol_name); | |
423 | if (ret) { | |
424 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
425 | goto end; | |
426 | } | |
427 | ||
428 | /* /function attributes */ | |
429 | ret = config_writer_close_element(writer); | |
430 | if (ret) { | |
431 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
432 | goto end; | |
433 | } | |
434 | end: | |
435 | return ret; | |
436 | } | |
437 | ||
438 | static | |
439 | int save_kernel_kprobe_event(struct config_writer *writer, | |
440 | struct ltt_kernel_event *event) | |
441 | { | |
442 | int ret; | |
443 | const char *symbol_name; | |
444 | uint64_t addr; | |
445 | uint64_t offset; | |
446 | ||
447 | switch (event->event->instrumentation) { | |
448 | case LTTNG_KERNEL_KPROBE: | |
449 | /* | |
450 | * Comments in lttng-kernel.h mention that | |
451 | * either addr or symbol_name are set, not both. | |
452 | */ | |
453 | addr = event->event->u.kprobe.addr; | |
454 | offset = event->event->u.kprobe.offset; | |
455 | symbol_name = addr ? NULL : event->event->u.kprobe.symbol_name; | |
456 | break; | |
457 | case LTTNG_KERNEL_KRETPROBE: | |
458 | addr = event->event->u.kretprobe.addr; | |
459 | offset = event->event->u.kretprobe.offset; | |
c1e83fb4 | 460 | symbol_name = addr ? NULL : event->event->u.kretprobe.symbol_name; |
83712c39 FD |
461 | break; |
462 | default: | |
463 | assert(1); | |
c1e83fb4 FD |
464 | ERR("Unsupported kernel instrumentation type."); |
465 | ret = LTTNG_ERR_INVALID; | |
466 | goto end; | |
83712c39 FD |
467 | } |
468 | ||
469 | ret = config_writer_open_element(writer, config_element_probe_attributes); | |
470 | if (ret) { | |
471 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
472 | goto end; | |
473 | } | |
474 | ||
c1e83fb4 FD |
475 | if (addr) { |
476 | ret = config_writer_write_element_unsigned_int( writer, | |
477 | config_element_address, addr); | |
478 | if (ret) { | |
479 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
480 | goto end; | |
481 | } | |
482 | } else if (symbol_name) { | |
83712c39 FD |
483 | ret = config_writer_write_element_string(writer, |
484 | config_element_symbol_name, symbol_name); | |
485 | if (ret) { | |
486 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
487 | goto end; | |
488 | } | |
c1e83fb4 FD |
489 | /* If the offset is non-zero, write it.*/ |
490 | if (offset) { | |
491 | ret = config_writer_write_element_unsigned_int(writer, | |
492 | config_element_offset, offset); | |
493 | if (ret) { | |
494 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
495 | goto end; | |
496 | } | |
497 | } | |
498 | } else { | |
499 | /* | |
500 | * This really should not happen as we are either setting the | |
501 | * address or the symbol above. | |
502 | */ | |
503 | ERR("Invalid probe/function description."); | |
504 | ret = LTTNG_ERR_INVALID; | |
505 | goto end; | |
83712c39 FD |
506 | } |
507 | ||
c1e83fb4 FD |
508 | |
509 | ret = config_writer_close_element(writer); | |
510 | if (ret) { | |
511 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
512 | goto end; | |
513 | } | |
514 | end: | |
515 | return ret; | |
516 | } | |
517 | ||
518 | /* | |
519 | * Save the userspace probe tracepoint event associated with the event to the | |
520 | * config writer. | |
521 | */ | |
522 | static | |
523 | int save_kernel_userspace_probe_tracepoint_event(struct config_writer *writer, | |
524 | struct ltt_kernel_event *event) | |
525 | { | |
526 | int ret = 0; | |
527 | const char *probe_name, *provider_name, *binary_path; | |
87597c2c JG |
528 | const struct lttng_userspace_probe_location *userspace_probe_location; |
529 | const struct lttng_userspace_probe_location_lookup_method *lookup_method; | |
c1e83fb4 FD |
530 | enum lttng_userspace_probe_location_lookup_method_type lookup_type; |
531 | ||
532 | /* Get userspace probe location from the event. */ | |
533 | userspace_probe_location = event->userspace_probe_location; | |
534 | if (!userspace_probe_location) { | |
535 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
536 | goto end; | |
537 | } | |
538 | ||
539 | /* Get lookup method and lookup method type. */ | |
540 | lookup_method = lttng_userspace_probe_location_get_lookup_method(userspace_probe_location); | |
541 | if (!lookup_method) { | |
542 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
543 | goto end; | |
544 | } | |
545 | ||
546 | lookup_type = lttng_userspace_probe_location_lookup_method_get_type(lookup_method); | |
547 | ||
548 | /* Get the binary path, probe name and provider name. */ | |
549 | binary_path = | |
550 | lttng_userspace_probe_location_tracepoint_get_binary_path( | |
551 | userspace_probe_location); | |
552 | if (!binary_path) { | |
553 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
554 | goto end; | |
555 | } | |
556 | ||
557 | probe_name = | |
558 | lttng_userspace_probe_location_tracepoint_get_probe_name( | |
559 | userspace_probe_location); | |
560 | if (!probe_name) { | |
561 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
562 | goto end; | |
563 | } | |
564 | ||
565 | provider_name = | |
566 | lttng_userspace_probe_location_tracepoint_get_provider_name( | |
567 | userspace_probe_location); | |
568 | if (!provider_name) { | |
569 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
570 | goto end; | |
571 | } | |
572 | ||
573 | /* Open a userspace probe tracepoint attribute. */ | |
574 | ret = config_writer_open_element(writer, config_element_userspace_probe_tracepoint_attributes); | |
575 | if (ret) { | |
576 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
577 | goto end; | |
578 | } | |
579 | ||
580 | switch (lookup_type) { | |
581 | case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT: | |
582 | ret = config_writer_write_element_string(writer, | |
583 | config_element_userspace_probe_lookup, | |
584 | config_element_userspace_probe_lookup_tracepoint_sdt); | |
83712c39 FD |
585 | if (ret) { |
586 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
587 | goto end; | |
588 | } | |
c1e83fb4 FD |
589 | break; |
590 | default: | |
591 | ERR("Unsupported kernel userspace probe tracepoint lookup method."); | |
592 | ret = LTTNG_ERR_INVALID; | |
593 | goto end; | |
83712c39 FD |
594 | } |
595 | ||
c1e83fb4 FD |
596 | /* Write the binary path, provider name and the probe name. */ |
597 | ret = config_writer_write_element_string(writer, | |
598 | config_element_userspace_probe_location_binary_path, | |
599 | binary_path); | |
600 | if (ret) { | |
601 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
602 | goto end; | |
603 | } | |
604 | ||
605 | ret = config_writer_write_element_string(writer, | |
606 | config_element_userspace_probe_tracepoint_location_provider_name, | |
607 | provider_name); | |
608 | if (ret) { | |
609 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
610 | goto end; | |
611 | } | |
612 | ||
613 | ret = config_writer_write_element_string(writer, | |
614 | config_element_userspace_probe_tracepoint_location_probe_name, | |
615 | probe_name); | |
616 | if (ret) { | |
617 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
618 | goto end; | |
619 | } | |
620 | ||
621 | /* Close the userspace probe tracepoint attribute. */ | |
622 | ret = config_writer_close_element(writer); | |
623 | if (ret) { | |
624 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
625 | goto end; | |
626 | } | |
627 | ||
628 | end: | |
629 | return ret; | |
630 | } | |
631 | ||
632 | /* | |
633 | * Save the userspace probe function event associated with the event to the | |
634 | * config writer. | |
635 | */ | |
636 | static | |
637 | int save_kernel_userspace_probe_function_event(struct config_writer *writer, | |
638 | struct ltt_kernel_event *event) | |
639 | { | |
640 | int ret = 0; | |
641 | const char *function_name, *binary_path; | |
87597c2c JG |
642 | const struct lttng_userspace_probe_location *userspace_probe_location; |
643 | const struct lttng_userspace_probe_location_lookup_method *lookup_method; | |
c1e83fb4 FD |
644 | enum lttng_userspace_probe_location_lookup_method_type lookup_type; |
645 | ||
646 | /* Get userspace probe location from the event. */ | |
647 | userspace_probe_location = event->userspace_probe_location; | |
648 | if (!userspace_probe_location) { | |
649 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
650 | goto end; | |
651 | } | |
652 | ||
653 | /* Get lookup method and lookup method type. */ | |
654 | lookup_method = lttng_userspace_probe_location_get_lookup_method( | |
655 | userspace_probe_location); | |
656 | if (!lookup_method) { | |
657 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
658 | goto end; | |
659 | } | |
660 | ||
661 | /* Get the binary path and the function name. */ | |
662 | binary_path = | |
663 | lttng_userspace_probe_location_function_get_binary_path( | |
664 | userspace_probe_location); | |
665 | if (!binary_path) { | |
666 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
667 | goto end; | |
668 | } | |
669 | ||
670 | function_name = | |
671 | lttng_userspace_probe_location_function_get_function_name( | |
672 | userspace_probe_location); | |
673 | if (!function_name) { | |
674 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
675 | goto end; | |
676 | } | |
677 | ||
678 | /* Open a userspace probe function attribute. */ | |
679 | ret = config_writer_open_element(writer, | |
680 | config_element_userspace_probe_function_attributes); | |
681 | if (ret) { | |
682 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
683 | goto end; | |
684 | } | |
685 | ||
686 | lookup_type = lttng_userspace_probe_location_lookup_method_get_type(lookup_method); | |
687 | switch (lookup_type) { | |
688 | case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF: | |
689 | ret = config_writer_write_element_string(writer, | |
690 | config_element_userspace_probe_lookup, | |
691 | config_element_userspace_probe_lookup_function_elf); | |
83712c39 FD |
692 | if (ret) { |
693 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
694 | goto end; | |
695 | } | |
c1e83fb4 FD |
696 | break; |
697 | case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_DEFAULT: | |
698 | ret = config_writer_write_element_string(writer, | |
699 | config_element_userspace_probe_lookup, | |
700 | config_element_userspace_probe_lookup_function_default); | |
701 | if (ret) { | |
702 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
703 | goto end; | |
704 | } | |
705 | break; | |
706 | default: | |
707 | ERR("Unsupported kernel userspace probe function lookup method."); | |
708 | ret = LTTNG_ERR_INVALID; | |
709 | goto end; | |
83712c39 FD |
710 | } |
711 | ||
c1e83fb4 FD |
712 | /* Write the binary path and the function name. */ |
713 | ret = config_writer_write_element_string(writer, | |
714 | config_element_userspace_probe_location_binary_path, | |
715 | binary_path); | |
716 | if (ret) { | |
717 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
718 | goto end; | |
719 | } | |
720 | ||
721 | ret = config_writer_write_element_string(writer, | |
722 | config_element_userspace_probe_function_location_function_name, | |
723 | function_name); | |
724 | if (ret) { | |
725 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
726 | goto end; | |
727 | } | |
728 | ||
729 | /* Close the userspace probe function attribute. */ | |
83712c39 FD |
730 | ret = config_writer_close_element(writer); |
731 | if (ret) { | |
732 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
733 | goto end; | |
734 | } | |
c1e83fb4 | 735 | |
83712c39 FD |
736 | end: |
737 | return ret; | |
738 | } | |
c1e83fb4 FD |
739 | |
740 | static | |
741 | int save_kernel_userspace_probe_event(struct config_writer *writer, | |
742 | struct ltt_kernel_event *event) | |
743 | { | |
744 | int ret; | |
745 | struct lttng_userspace_probe_location *userspace_probe_location; | |
746 | ||
747 | /* Get userspace probe location from the event. */ | |
748 | userspace_probe_location = event->userspace_probe_location; | |
749 | if (!userspace_probe_location) { | |
750 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
751 | goto end; | |
752 | } | |
753 | ||
754 | switch(lttng_userspace_probe_location_get_type(userspace_probe_location)) { | |
755 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION: | |
756 | { | |
757 | ret = save_kernel_userspace_probe_function_event(writer, event); | |
758 | if (ret) { | |
759 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
760 | goto end; | |
761 | } | |
762 | break; | |
763 | } | |
764 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT: | |
765 | { | |
766 | ret = save_kernel_userspace_probe_tracepoint_event(writer, event); | |
767 | if (ret) { | |
768 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
769 | goto end; | |
770 | } | |
771 | break; | |
772 | } | |
773 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_UNKNOWN: | |
774 | default: | |
775 | ERR("Unsupported kernel userspace probe location type."); | |
776 | ret = LTTNG_ERR_INVALID; | |
777 | goto end; | |
778 | } | |
779 | ||
780 | end: | |
781 | return ret; | |
782 | } | |
783 | ||
784 | static | |
fb198a11 | 785 | int save_kernel_event(struct config_writer *writer, |
83712c39 | 786 | struct ltt_kernel_event *event) |
fb198a11 JG |
787 | { |
788 | int ret; | |
789 | const char *instrumentation_type; | |
790 | ||
791 | ret = config_writer_open_element(writer, config_element_event); | |
792 | if (ret) { | |
793 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
794 | goto end; | |
795 | } | |
796 | ||
797 | if (event->event->name[0]) { | |
798 | ret = config_writer_write_element_string(writer, | |
799 | config_element_name, event->event->name); | |
800 | if (ret) { | |
801 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
802 | goto end; | |
803 | } | |
804 | } | |
805 | ||
806 | ret = config_writer_write_element_bool(writer, config_element_enabled, | |
807 | event->enabled); | |
808 | if (ret) { | |
809 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
810 | goto end; | |
811 | } | |
812 | ||
813 | instrumentation_type = get_kernel_instrumentation_string( | |
814 | event->event->instrumentation); | |
815 | if (!instrumentation_type) { | |
816 | ret = LTTNG_ERR_INVALID; | |
817 | goto end; | |
818 | } | |
819 | ||
820 | ret = config_writer_write_element_string(writer, config_element_type, | |
821 | instrumentation_type); | |
822 | if (ret) { | |
823 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
824 | goto end; | |
825 | } | |
826 | ||
911d1560 JG |
827 | if (event->filter_expression) { |
828 | ret = config_writer_write_element_string(writer, | |
829 | config_element_filter, | |
830 | event->filter_expression); | |
831 | if (ret) { | |
832 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
833 | goto end; | |
834 | } | |
835 | } | |
836 | ||
fb198a11 JG |
837 | if (event->event->instrumentation == LTTNG_KERNEL_FUNCTION || |
838 | event->event->instrumentation == LTTNG_KERNEL_KPROBE || | |
c1e83fb4 | 839 | event->event->instrumentation == LTTNG_KERNEL_UPROBE || |
fb198a11 JG |
840 | event->event->instrumentation == LTTNG_KERNEL_KRETPROBE) { |
841 | ||
842 | ret = config_writer_open_element(writer, | |
843 | config_element_attributes); | |
844 | if (ret) { | |
845 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
846 | goto end; | |
847 | } | |
848 | ||
849 | switch (event->event->instrumentation) { | |
0de3eda1 | 850 | case LTTNG_KERNEL_SYSCALL: |
fb198a11 | 851 | case LTTNG_KERNEL_FUNCTION: |
83712c39 | 852 | ret = save_kernel_function_event(writer, event); |
fb198a11 | 853 | if (ret) { |
fb198a11 JG |
854 | goto end; |
855 | } | |
856 | break; | |
857 | case LTTNG_KERNEL_KPROBE: | |
858 | case LTTNG_KERNEL_KRETPROBE: | |
83712c39 | 859 | ret = save_kernel_kprobe_event(writer, event); |
fb198a11 | 860 | if (ret) { |
fb198a11 JG |
861 | goto end; |
862 | } | |
863 | break; | |
c1e83fb4 FD |
864 | case LTTNG_KERNEL_UPROBE: |
865 | ret = save_kernel_userspace_probe_event(writer, event); | |
866 | if (ret) { | |
867 | goto end; | |
868 | } | |
869 | break; | |
fb198a11 JG |
870 | default: |
871 | ERR("Unsupported kernel instrumentation type."); | |
872 | ret = LTTNG_ERR_INVALID; | |
873 | goto end; | |
874 | } | |
875 | ||
876 | /* /attributes */ | |
877 | ret = config_writer_close_element(writer); | |
878 | if (ret) { | |
879 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
880 | goto end; | |
881 | } | |
882 | } | |
883 | ||
884 | /* /event */ | |
885 | ret = config_writer_close_element(writer); | |
886 | if (ret) { | |
887 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
888 | goto end; | |
889 | } | |
890 | end: | |
891 | return ret; | |
892 | } | |
893 | ||
894 | static | |
895 | int save_kernel_events(struct config_writer *writer, | |
0de3eda1 | 896 | struct ltt_kernel_channel *kchan) |
fb198a11 JG |
897 | { |
898 | int ret; | |
899 | struct ltt_kernel_event *event; | |
900 | ||
901 | ret = config_writer_open_element(writer, config_element_events); | |
902 | if (ret) { | |
903 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
904 | goto end; | |
905 | } | |
906 | ||
0de3eda1 | 907 | cds_list_for_each_entry(event, &kchan->events_list.head, list) { |
fb198a11 JG |
908 | ret = save_kernel_event(writer, event); |
909 | if (ret) { | |
910 | goto end; | |
911 | } | |
912 | } | |
913 | ||
914 | /* /events */ | |
915 | ret = config_writer_close_element(writer); | |
916 | if (ret) { | |
917 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
918 | goto end; | |
919 | } | |
920 | end: | |
921 | return ret; | |
922 | } | |
923 | ||
924 | static | |
925 | int save_ust_event(struct config_writer *writer, | |
926 | struct ltt_ust_event *event) | |
927 | { | |
928 | int ret; | |
929 | const char *loglevel_type_string; | |
930 | ||
931 | ret = config_writer_open_element(writer, config_element_event); | |
932 | if (ret) { | |
933 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
934 | goto end; | |
935 | } | |
936 | ||
937 | if (event->attr.name[0]) { | |
938 | ret = config_writer_write_element_string(writer, | |
939 | config_element_name, event->attr.name); | |
940 | if (ret) { | |
941 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
942 | goto end; | |
943 | } | |
944 | } | |
945 | ||
946 | ret = config_writer_write_element_bool(writer, config_element_enabled, | |
947 | event->enabled); | |
948 | if (ret) { | |
949 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
950 | goto end; | |
951 | } | |
952 | ||
953 | if (event->attr.instrumentation != LTTNG_UST_TRACEPOINT) { | |
954 | ERR("Unsupported UST instrumentation type."); | |
955 | ret = LTTNG_ERR_INVALID; | |
956 | goto end; | |
957 | } | |
958 | ret = config_writer_write_element_string(writer, config_element_type, | |
959 | config_event_type_tracepoint); | |
960 | if (ret) { | |
961 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
962 | goto end; | |
963 | } | |
964 | ||
965 | loglevel_type_string = get_loglevel_type_string( | |
966 | event->attr.loglevel_type); | |
967 | if (!loglevel_type_string) { | |
968 | ERR("Unsupported UST loglevel type."); | |
969 | ret = LTTNG_ERR_INVALID; | |
970 | goto end; | |
971 | } | |
972 | ||
973 | ret = config_writer_write_element_string(writer, | |
974 | config_element_loglevel_type, loglevel_type_string); | |
975 | if (ret) { | |
976 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
977 | goto end; | |
978 | } | |
979 | ||
1adbdb10 JG |
980 | /* The log level is irrelevant if no "filtering" is enabled */ |
981 | if (event->attr.loglevel_type != LTTNG_UST_LOGLEVEL_ALL) { | |
982 | ret = config_writer_write_element_signed_int(writer, | |
983 | config_element_loglevel, event->attr.loglevel); | |
984 | if (ret) { | |
985 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
986 | goto end; | |
987 | } | |
fb198a11 JG |
988 | } |
989 | ||
990 | if (event->filter_expression) { | |
991 | ret = config_writer_write_element_string(writer, | |
992 | config_element_filter, event->filter_expression); | |
993 | if (ret) { | |
994 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
995 | goto end; | |
996 | } | |
997 | } | |
998 | ||
999 | if (event->exclusion && event->exclusion->count) { | |
1000 | uint32_t i; | |
1001 | ||
1002 | ret = config_writer_open_element(writer, | |
1003 | config_element_exclusions); | |
1004 | if (ret) { | |
1005 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1006 | goto end; | |
1007 | } | |
1008 | ||
1009 | for (i = 0; i < event->exclusion->count; i++) { | |
1010 | ret = config_writer_write_element_string(writer, | |
1011 | config_element_exclusion, | |
d7af3565 PP |
1012 | LTTNG_EVENT_EXCLUSION_NAME_AT( |
1013 | event->exclusion, i)); | |
fb198a11 JG |
1014 | if (ret) { |
1015 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1016 | goto end; | |
1017 | } | |
1018 | } | |
1019 | ||
1020 | /* /exclusions */ | |
1021 | ret = config_writer_close_element(writer); | |
1022 | if (ret) { | |
1023 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1024 | goto end; | |
1025 | } | |
1026 | } | |
1027 | ||
1028 | /* /event */ | |
1029 | ret = config_writer_close_element(writer); | |
1030 | if (ret) { | |
1031 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1032 | goto end; | |
1033 | } | |
1034 | end: | |
1035 | return ret; | |
1036 | } | |
1037 | ||
1038 | static | |
1039 | int save_ust_events(struct config_writer *writer, | |
1040 | struct lttng_ht *events) | |
1041 | { | |
1042 | int ret; | |
1043 | struct ltt_ust_event *event; | |
1044 | struct lttng_ht_node_str *node; | |
1045 | struct lttng_ht_iter iter; | |
1046 | ||
1047 | ret = config_writer_open_element(writer, config_element_events); | |
1048 | if (ret) { | |
1049 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1050 | goto end; | |
1051 | } | |
1052 | ||
1053 | rcu_read_lock(); | |
1054 | cds_lfht_for_each_entry(events->ht, &iter.iter, node, node) { | |
1055 | event = caa_container_of(node, struct ltt_ust_event, node); | |
1056 | ||
af325ba1 JG |
1057 | if (event->internal) { |
1058 | /* Internal events must not be exposed to clients */ | |
1059 | continue; | |
1060 | } | |
fb198a11 JG |
1061 | ret = save_ust_event(writer, event); |
1062 | if (ret) { | |
1063 | rcu_read_unlock(); | |
1064 | goto end; | |
1065 | } | |
1066 | } | |
1067 | rcu_read_unlock(); | |
1068 | ||
1069 | /* /events */ | |
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 | ||
51755dc8 | 1079 | static |
0b35b846 | 1080 | int init_ust_event_from_agent_event(struct ltt_ust_event *ust_event, |
51755dc8 JG |
1081 | struct agent_event *agent_event) |
1082 | { | |
0b35b846 JG |
1083 | int ret = 0; |
1084 | enum lttng_ust_loglevel_type ust_loglevel_type; | |
1085 | ||
51755dc8 JG |
1086 | ust_event->enabled = agent_event->enabled; |
1087 | ust_event->attr.instrumentation = LTTNG_UST_TRACEPOINT; | |
d333bdaa MD |
1088 | if (lttng_strncpy(ust_event->attr.name, agent_event->name, |
1089 | LTTNG_SYMBOL_NAME_LEN)) { | |
1090 | ret = -1; | |
1091 | goto end; | |
1092 | } | |
0b35b846 JG |
1093 | switch (agent_event->loglevel_type) { |
1094 | case LTTNG_EVENT_LOGLEVEL_ALL: | |
1095 | ust_loglevel_type = LTTNG_UST_LOGLEVEL_ALL; | |
1096 | break; | |
1097 | case LTTNG_EVENT_LOGLEVEL_SINGLE: | |
1098 | ust_loglevel_type = LTTNG_UST_LOGLEVEL_SINGLE; | |
1099 | break; | |
1100 | case LTTNG_EVENT_LOGLEVEL_RANGE: | |
1101 | ust_loglevel_type = LTTNG_UST_LOGLEVEL_RANGE; | |
1102 | break; | |
1103 | default: | |
1104 | ERR("Invalid agent_event loglevel_type."); | |
1105 | ret = -1; | |
1106 | goto end; | |
1107 | } | |
1108 | ||
1109 | ust_event->attr.loglevel_type = ust_loglevel_type; | |
2106efa0 | 1110 | ust_event->attr.loglevel = agent_event->loglevel_value; |
51755dc8 JG |
1111 | ust_event->filter_expression = agent_event->filter_expression; |
1112 | ust_event->exclusion = agent_event->exclusion; | |
0b35b846 JG |
1113 | end: |
1114 | return ret; | |
51755dc8 JG |
1115 | } |
1116 | ||
1117 | static | |
1118 | int save_agent_events(struct config_writer *writer, | |
51755dc8 JG |
1119 | struct agent *agent) |
1120 | { | |
1121 | int ret; | |
1122 | struct lttng_ht_iter iter; | |
1123 | struct lttng_ht_node_str *node; | |
1124 | ||
1125 | ret = config_writer_open_element(writer, config_element_events); | |
1126 | if (ret) { | |
1127 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1128 | goto end; | |
1129 | } | |
1130 | ||
1131 | rcu_read_lock(); | |
1132 | cds_lfht_for_each_entry(agent->events->ht, &iter.iter, node, node) { | |
1133 | int ret; | |
1134 | struct agent_event *agent_event; | |
1135 | struct ltt_ust_event fake_event; | |
1136 | ||
1137 | memset(&fake_event, 0, sizeof(fake_event)); | |
1138 | agent_event = caa_container_of(node, struct agent_event, node); | |
1139 | ||
1140 | /* | |
1141 | * Initialize a fake ust event to reuse the same serialization | |
1142 | * function since UST and agent events contain the same info | |
1143 | * (and one could wonder why they don't reuse the same | |
1144 | * structures...). | |
1145 | */ | |
0b35b846 JG |
1146 | ret = init_ust_event_from_agent_event(&fake_event, agent_event); |
1147 | if (ret) { | |
1148 | rcu_read_unlock(); | |
1149 | goto end; | |
1150 | } | |
51755dc8 JG |
1151 | ret = save_ust_event(writer, &fake_event); |
1152 | if (ret) { | |
1153 | rcu_read_unlock(); | |
1154 | goto end; | |
1155 | } | |
1156 | } | |
1157 | rcu_read_unlock(); | |
1158 | ||
1159 | /* /events */ | |
1160 | ret = config_writer_close_element(writer); | |
1161 | if (ret) { | |
1162 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1163 | goto end; | |
1164 | } | |
1165 | end: | |
1166 | return ret; | |
1167 | } | |
1168 | ||
fb198a11 JG |
1169 | static |
1170 | int save_kernel_context(struct config_writer *writer, | |
1171 | struct lttng_kernel_context *ctx) | |
1172 | { | |
1173 | int ret = 0; | |
1174 | ||
1175 | if (!ctx) { | |
1176 | goto end; | |
1177 | } | |
1178 | ||
fb198a11 JG |
1179 | ret = config_writer_open_element(writer, config_element_context); |
1180 | if (ret) { | |
1181 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1182 | goto end; | |
1183 | } | |
1184 | ||
cba45eda | 1185 | if (ctx->ctx == LTTNG_KERNEL_CONTEXT_PERF_CPU_COUNTER) { |
045fc617 JG |
1186 | ret = config_writer_open_element(writer, |
1187 | config_element_context_perf); | |
fb198a11 JG |
1188 | if (ret) { |
1189 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1190 | goto end; | |
1191 | } | |
1192 | ||
1193 | ret = config_writer_write_element_unsigned_int(writer, | |
1194 | config_element_type, ctx->u.perf_counter.type); | |
1195 | if (ret) { | |
1196 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1197 | goto end; | |
1198 | } | |
1199 | ||
1200 | ret = config_writer_write_element_unsigned_int(writer, | |
1201 | config_element_config, ctx->u.perf_counter.config); | |
1202 | if (ret) { | |
1203 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1204 | goto end; | |
1205 | } | |
1206 | ||
1207 | ret = config_writer_write_element_string(writer, | |
1208 | config_element_name, ctx->u.perf_counter.name); | |
1209 | if (ret) { | |
1210 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1211 | goto end; | |
1212 | } | |
1213 | ||
1214 | /* /perf */ | |
1215 | ret = config_writer_close_element(writer); | |
1216 | if (ret) { | |
1217 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1218 | goto end; | |
1219 | } | |
1220 | } else { | |
1221 | const char *context_type_string = | |
1222 | get_kernel_context_type_string(ctx->ctx); | |
1223 | ||
1224 | if (!context_type_string) { | |
1225 | ERR("Unsupported kernel context type."); | |
1226 | ret = LTTNG_ERR_INVALID; | |
1227 | goto end; | |
1228 | } | |
1229 | ||
1230 | ret = config_writer_write_element_string(writer, | |
1231 | config_element_type, context_type_string); | |
1232 | if (ret) { | |
1233 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1234 | goto end; | |
1235 | } | |
1236 | } | |
1237 | ||
1238 | /* /context */ | |
1239 | ret = config_writer_close_element(writer); | |
1240 | if (ret) { | |
1241 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1242 | goto end; | |
1243 | } | |
1244 | ||
645328ae DG |
1245 | end: |
1246 | return ret; | |
1247 | } | |
1248 | ||
1249 | static | |
1250 | int save_kernel_contexts(struct config_writer *writer, | |
1251 | struct ltt_kernel_channel *kchan) | |
1252 | { | |
1253 | int ret; | |
1254 | struct ltt_kernel_context *ctx; | |
1255 | ||
2aa64052 JG |
1256 | if (cds_list_empty(&kchan->ctx_list)) { |
1257 | ret = 0; | |
1258 | goto end; | |
1259 | } | |
1260 | ||
645328ae DG |
1261 | ret = config_writer_open_element(writer, config_element_contexts); |
1262 | if (ret) { | |
1263 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1264 | goto end; | |
1265 | } | |
1266 | ||
1267 | cds_list_for_each_entry(ctx, &kchan->ctx_list, list) { | |
1268 | ret = save_kernel_context(writer, &ctx->ctx); | |
1269 | if (ret) { | |
1270 | goto end; | |
1271 | } | |
1272 | } | |
1273 | ||
fb198a11 JG |
1274 | /* /contexts */ |
1275 | ret = config_writer_close_element(writer); | |
1276 | if (ret) { | |
1277 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1278 | goto end; | |
1279 | } | |
1280 | end: | |
1281 | return ret; | |
1282 | } | |
1283 | ||
045fc617 JG |
1284 | static |
1285 | int save_ust_context_perf_thread_counter(struct config_writer *writer, | |
1286 | struct ltt_ust_context *ctx) | |
1287 | { | |
1288 | int ret; | |
1289 | ||
1290 | assert(writer); | |
1291 | assert(ctx); | |
1292 | ||
1293 | /* Perf contexts are saved as event_perf_context_type */ | |
1294 | ret = config_writer_open_element(writer, config_element_context_perf); | |
1295 | if (ret) { | |
1296 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1297 | goto end; | |
1298 | } | |
1299 | ||
1300 | ret = config_writer_write_element_unsigned_int(writer, | |
1301 | config_element_type, ctx->ctx.u.perf_counter.type); | |
1302 | if (ret) { | |
1303 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1304 | goto end; | |
1305 | } | |
1306 | ||
1307 | ret = config_writer_write_element_unsigned_int(writer, | |
1308 | config_element_config, ctx->ctx.u.perf_counter.config); | |
1309 | if (ret) { | |
1310 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1311 | goto end; | |
1312 | } | |
1313 | ||
1314 | ret = config_writer_write_element_string(writer, config_element_name, | |
1315 | ctx->ctx.u.perf_counter.name); | |
1316 | if (ret) { | |
1317 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1318 | goto end; | |
1319 | } | |
1320 | ||
1321 | /* /perf */ | |
1322 | ret = config_writer_close_element(writer); | |
1323 | if (ret) { | |
1324 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1325 | goto end; | |
1326 | } | |
1327 | end: | |
1328 | return ret; | |
1329 | } | |
1330 | ||
1331 | static | |
1332 | int save_ust_context_app_ctx(struct config_writer *writer, | |
1333 | struct ltt_ust_context *ctx) | |
1334 | { | |
1335 | int ret; | |
1336 | ||
1337 | assert(writer); | |
1338 | assert(ctx); | |
1339 | ||
1340 | /* Application contexts are saved as application_context_type */ | |
1341 | ret = config_writer_open_element(writer, config_element_context_app); | |
1342 | if (ret) { | |
1343 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1344 | goto end; | |
1345 | } | |
1346 | ||
1347 | ret = config_writer_write_element_string(writer, | |
1348 | config_element_context_app_provider_name, | |
1349 | ctx->ctx.u.app_ctx.provider_name); | |
1350 | if (ret) { | |
1351 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1352 | goto end; | |
1353 | } | |
1354 | ||
1355 | ret = config_writer_write_element_string(writer, | |
1356 | config_element_context_app_ctx_name, | |
1357 | ctx->ctx.u.app_ctx.ctx_name); | |
1358 | if (ret) { | |
1359 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1360 | goto end; | |
1361 | } | |
1362 | ||
1363 | /* /app */ | |
1364 | ret = config_writer_close_element(writer); | |
1365 | if (ret) { | |
1366 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1367 | goto end; | |
1368 | } | |
1369 | end: | |
1370 | return ret; | |
1371 | } | |
1372 | ||
1373 | static | |
1374 | int save_ust_context_generic(struct config_writer *writer, | |
1375 | struct ltt_ust_context *ctx) | |
1376 | { | |
1377 | int ret; | |
1378 | const char *context_type_string; | |
1379 | ||
1380 | assert(writer); | |
1381 | assert(ctx); | |
1382 | ||
1383 | /* Save context as event_context_type_type */ | |
1384 | context_type_string = get_ust_context_type_string( | |
1385 | ctx->ctx.ctx); | |
1386 | if (!context_type_string) { | |
1387 | ERR("Unsupported UST context type."); | |
1388 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1389 | goto end; | |
1390 | } | |
1391 | ||
1392 | ret = config_writer_write_element_string(writer, | |
1393 | config_element_type, context_type_string); | |
1394 | if (ret) { | |
1395 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1396 | goto end; | |
1397 | } | |
1398 | end: | |
1399 | return ret; | |
1400 | } | |
1401 | ||
fb198a11 JG |
1402 | static |
1403 | int save_ust_context(struct config_writer *writer, | |
1404 | struct cds_list_head *ctx_list) | |
1405 | { | |
1406 | int ret; | |
1407 | struct ltt_ust_context *ctx; | |
1408 | ||
1409 | assert(writer); | |
1410 | assert(ctx_list); | |
1411 | ||
1412 | ret = config_writer_open_element(writer, config_element_contexts); | |
1413 | if (ret) { | |
1414 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1415 | goto end; | |
1416 | } | |
1417 | ||
1418 | cds_list_for_each_entry(ctx, ctx_list, list) { | |
fb198a11 JG |
1419 | ret = config_writer_open_element(writer, |
1420 | config_element_context); | |
1421 | if (ret) { | |
1422 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1423 | goto end; | |
1424 | } | |
1425 | ||
045fc617 JG |
1426 | switch (ctx->ctx.ctx) { |
1427 | case LTTNG_UST_CONTEXT_PERF_THREAD_COUNTER: | |
1428 | ret = save_ust_context_perf_thread_counter(writer, ctx); | |
1429 | break; | |
1430 | case LTTNG_UST_CONTEXT_APP_CONTEXT: | |
1431 | ret = save_ust_context_app_ctx(writer, ctx); | |
1432 | break; | |
1433 | default: | |
1434 | /* Save generic context. */ | |
1435 | ret = save_ust_context_generic(writer, ctx); | |
1436 | } | |
1437 | if (ret) { | |
1438 | goto end; | |
fb198a11 JG |
1439 | } |
1440 | ||
1441 | /* /context */ | |
1442 | ret = config_writer_close_element(writer); | |
1443 | if (ret) { | |
1444 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1445 | goto end; | |
1446 | } | |
1447 | } | |
1448 | ||
1449 | /* /contexts */ | |
1450 | ret = config_writer_close_element(writer); | |
1451 | if (ret) { | |
1452 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1453 | goto end; | |
1454 | } | |
1455 | end: | |
1456 | return ret; | |
1457 | } | |
1458 | ||
1459 | static | |
1460 | int save_kernel_channel(struct config_writer *writer, | |
1461 | struct ltt_kernel_channel *kchan) | |
1462 | { | |
1463 | int ret; | |
1464 | ||
1465 | assert(writer); | |
1466 | assert(kchan); | |
1467 | ||
1468 | ret = config_writer_open_element(writer, config_element_channel); | |
1469 | if (ret) { | |
1470 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1471 | goto end; | |
1472 | } | |
1473 | ||
1474 | ret = config_writer_write_element_string(writer, config_element_name, | |
1475 | kchan->channel->name); | |
1476 | if (ret) { | |
1477 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1478 | goto end; | |
1479 | } | |
1480 | ||
1481 | ret = config_writer_write_element_bool(writer, config_element_enabled, | |
1482 | kchan->channel->enabled); | |
1483 | if (ret) { | |
1484 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1485 | goto end; | |
1486 | } | |
1487 | ||
1488 | ret = save_kernel_channel_attributes(writer, &kchan->channel->attr); | |
1489 | if (ret) { | |
1490 | goto end; | |
1491 | } | |
1492 | ||
0de3eda1 | 1493 | ret = save_kernel_events(writer, kchan); |
fb198a11 JG |
1494 | if (ret) { |
1495 | goto end; | |
1496 | } | |
1497 | ||
645328ae | 1498 | ret = save_kernel_contexts(writer, kchan); |
fb198a11 JG |
1499 | if (ret) { |
1500 | goto end; | |
1501 | } | |
1502 | ||
1503 | /* /channel */ | |
1504 | ret = config_writer_close_element(writer); | |
1505 | if (ret) { | |
1506 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1507 | goto end; | |
1508 | } | |
1509 | end: | |
1510 | return ret; | |
1511 | } | |
1512 | ||
1513 | static | |
1514 | int save_ust_channel(struct config_writer *writer, | |
1515 | struct ltt_ust_channel *ust_chan, | |
1516 | struct ltt_ust_session *session) | |
1517 | { | |
1518 | int ret; | |
1519 | ||
1520 | assert(writer); | |
1521 | assert(ust_chan); | |
1522 | assert(session); | |
1523 | ||
1524 | ret = config_writer_open_element(writer, config_element_channel); | |
1525 | if (ret) { | |
1526 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1527 | goto end; | |
1528 | } | |
1529 | ||
1530 | ret = config_writer_write_element_string(writer, config_element_name, | |
1531 | ust_chan->name); | |
1532 | if (ret) { | |
1533 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1534 | goto end; | |
1535 | } | |
1536 | ||
1537 | ret = config_writer_write_element_bool(writer, config_element_enabled, | |
1538 | ust_chan->enabled); | |
1539 | if (ret) { | |
1540 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1541 | goto end; | |
1542 | } | |
1543 | ||
1544 | ret = save_ust_channel_attributes(writer, &ust_chan->attr); | |
1545 | if (ret) { | |
1546 | goto end; | |
1547 | } | |
1548 | ||
1549 | ret = config_writer_write_element_unsigned_int(writer, | |
1550 | config_element_tracefile_size, ust_chan->tracefile_size); | |
1551 | if (ret) { | |
1552 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1553 | goto end; | |
1554 | } | |
1555 | ||
1556 | ret = config_writer_write_element_unsigned_int(writer, | |
1557 | config_element_tracefile_count, ust_chan->tracefile_count); | |
1558 | if (ret) { | |
1559 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1560 | goto end; | |
1561 | } | |
1562 | ||
1563 | ret = config_writer_write_element_unsigned_int(writer, | |
1564 | config_element_live_timer_interval, | |
1565 | session->live_timer_interval); | |
1566 | if (ret) { | |
1567 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1568 | goto end; | |
1569 | } | |
1570 | ||
51755dc8 JG |
1571 | if (ust_chan->domain == LTTNG_DOMAIN_UST) { |
1572 | ret = save_ust_events(writer, ust_chan->events); | |
1573 | if (ret) { | |
1574 | goto end; | |
1575 | } | |
1576 | } else { | |
1577 | struct agent *agent = NULL; | |
1578 | ||
1579 | agent = trace_ust_find_agent(session, ust_chan->domain); | |
1580 | if (!agent) { | |
1581 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1582 | ERR("Could not find agent associated to UST subdomain"); | |
1583 | goto end; | |
1584 | } | |
1585 | ||
1586 | /* | |
1587 | * Channels associated with a UST sub-domain (such as JUL, Log4j | |
1588 | * or Python) don't have any non-internal events. We retrieve | |
1589 | * the "agent" events associated with this channel and serialize | |
1590 | * them. | |
1591 | */ | |
8cd0a98d | 1592 | ret = save_agent_events(writer, agent); |
51755dc8 JG |
1593 | if (ret) { |
1594 | goto end; | |
1595 | } | |
fb198a11 JG |
1596 | } |
1597 | ||
1598 | ret = save_ust_context(writer, &ust_chan->ctx_list); | |
1599 | if (ret) { | |
1600 | goto end; | |
1601 | } | |
1602 | ||
1603 | /* /channel */ | |
1604 | ret = config_writer_close_element(writer); | |
1605 | if (ret) { | |
1606 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1607 | goto end; | |
1608 | } | |
1609 | end: | |
1610 | return ret; | |
1611 | } | |
1612 | ||
1613 | static | |
1614 | int save_kernel_session(struct config_writer *writer, | |
1615 | struct ltt_session *session) | |
1616 | { | |
1617 | int ret; | |
1618 | struct ltt_kernel_channel *kchan; | |
1619 | ||
1620 | assert(writer); | |
1621 | assert(session); | |
1622 | ||
1623 | ret = config_writer_write_element_string(writer, config_element_type, | |
1624 | config_domain_type_kernel); | |
1625 | if (ret) { | |
1626 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1627 | goto end; | |
1628 | } | |
1629 | ||
1630 | ret = config_writer_write_element_string(writer, | |
1631 | config_element_buffer_type, config_buffer_type_global); | |
1632 | if (ret) { | |
1633 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1634 | goto end; | |
1635 | } | |
1636 | ||
1637 | ret = config_writer_open_element(writer, | |
1638 | config_element_channels); | |
1639 | if (ret) { | |
1640 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1641 | goto end; | |
1642 | } | |
1643 | ||
1644 | cds_list_for_each_entry(kchan, &session->kernel_session->channel_list.head, | |
1645 | list) { | |
1646 | ret = save_kernel_channel(writer, kchan); | |
1647 | if (ret) { | |
1648 | goto end; | |
1649 | } | |
1650 | } | |
1651 | ||
1652 | /* /channels */ | |
1653 | ret = config_writer_close_element(writer); | |
1654 | if (ret) { | |
1655 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1656 | goto end; | |
1657 | } | |
1658 | end: | |
1659 | return ret; | |
1660 | } | |
1661 | ||
1662 | static | |
51755dc8 JG |
1663 | const char *get_config_domain_str(enum lttng_domain_type domain) |
1664 | { | |
1665 | const char *str_dom; | |
1666 | ||
1667 | switch (domain) { | |
1668 | case LTTNG_DOMAIN_KERNEL: | |
1669 | str_dom = config_domain_type_kernel; | |
1670 | break; | |
1671 | case LTTNG_DOMAIN_UST: | |
1672 | str_dom = config_domain_type_ust; | |
1673 | break; | |
1674 | case LTTNG_DOMAIN_JUL: | |
1675 | str_dom = config_domain_type_jul; | |
1676 | break; | |
1677 | case LTTNG_DOMAIN_LOG4J: | |
1678 | str_dom = config_domain_type_log4j; | |
1679 | break; | |
1680 | case LTTNG_DOMAIN_PYTHON: | |
1681 | str_dom = config_domain_type_python; | |
1682 | break; | |
1683 | default: | |
1684 | assert(0); | |
1685 | } | |
1686 | ||
1687 | return str_dom; | |
1688 | } | |
1689 | ||
e8fcabef JG |
1690 | static |
1691 | int save_pid_tracker(struct config_writer *writer, | |
1692 | struct ltt_session *sess, int domain) | |
1693 | { | |
1694 | int ret = 0; | |
1695 | ssize_t nr_pids = 0, i; | |
1696 | int32_t *pids = NULL; | |
1697 | ||
1698 | switch (domain) { | |
1699 | case LTTNG_DOMAIN_KERNEL: | |
1700 | { | |
1701 | nr_pids = kernel_list_tracker_pids(sess->kernel_session, &pids); | |
1702 | if (nr_pids < 0) { | |
1703 | ret = LTTNG_ERR_KERN_LIST_FAIL; | |
1704 | goto end; | |
1705 | } | |
1706 | break; | |
1707 | } | |
1708 | case LTTNG_DOMAIN_UST: | |
1709 | { | |
1710 | nr_pids = trace_ust_list_tracker_pids(sess->ust_session, &pids); | |
1711 | if (nr_pids < 0) { | |
1712 | ret = LTTNG_ERR_UST_LIST_FAIL; | |
1713 | goto end; | |
1714 | } | |
1715 | break; | |
1716 | } | |
1717 | case LTTNG_DOMAIN_JUL: | |
1718 | case LTTNG_DOMAIN_LOG4J: | |
1719 | case LTTNG_DOMAIN_PYTHON: | |
1720 | default: | |
1721 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; | |
1722 | goto end; | |
1723 | } | |
1724 | ||
1725 | /* Only create a pid_tracker if enabled or untrack all */ | |
1726 | if (nr_pids != 1 || (nr_pids == 1 && pids[0] != -1)) { | |
1727 | ret = config_writer_open_element(writer, | |
1728 | config_element_pid_tracker); | |
1729 | if (ret) { | |
1730 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1731 | goto end; | |
1732 | } | |
1733 | ||
1734 | ret = config_writer_open_element(writer, | |
1735 | config_element_targets); | |
1736 | if (ret) { | |
1737 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1738 | goto end; | |
1739 | } | |
1740 | ||
1741 | for (i = 0; i < nr_pids; i++) { | |
1742 | ret = config_writer_open_element(writer, | |
1743 | config_element_target_pid); | |
1744 | if (ret) { | |
1745 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1746 | goto end; | |
1747 | } | |
1748 | ||
1749 | ret = config_writer_write_element_unsigned_int(writer, | |
1750 | config_element_pid, pids[i]); | |
1751 | if (ret) { | |
1752 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1753 | goto end; | |
1754 | } | |
1755 | ||
1756 | /* /pid_target */ | |
1757 | ret = config_writer_close_element(writer); | |
1758 | if (ret) { | |
1759 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1760 | goto end; | |
1761 | } | |
1762 | } | |
1763 | ||
1764 | /* /targets */ | |
1765 | ret = config_writer_close_element(writer); | |
1766 | if (ret) { | |
1767 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1768 | goto end; | |
1769 | } | |
1770 | ||
1771 | /* /pid_tracker */ | |
1772 | ret = config_writer_close_element(writer); | |
1773 | if (ret) { | |
1774 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1775 | goto end; | |
1776 | } | |
1777 | } | |
1778 | end: | |
1779 | free(pids); | |
1780 | return ret; | |
1781 | } | |
1782 | ||
51755dc8 JG |
1783 | static |
1784 | int save_ust_domain(struct config_writer *writer, | |
1785 | struct ltt_session *session, enum lttng_domain_type domain) | |
fb198a11 JG |
1786 | { |
1787 | int ret; | |
1788 | struct ltt_ust_channel *ust_chan; | |
1789 | const char *buffer_type_string; | |
1790 | struct lttng_ht_node_str *node; | |
1791 | struct lttng_ht_iter iter; | |
51755dc8 | 1792 | const char *config_domain_name; |
fb198a11 JG |
1793 | |
1794 | assert(writer); | |
1795 | assert(session); | |
1796 | ||
51755dc8 JG |
1797 | ret = config_writer_open_element(writer, |
1798 | config_element_domain); | |
1799 | if (ret) { | |
1800 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1801 | goto end; | |
1802 | } | |
1803 | ||
1804 | config_domain_name = get_config_domain_str(domain); | |
1805 | if (!config_domain_name) { | |
1806 | ret = LTTNG_ERR_INVALID; | |
1807 | goto end; | |
1808 | } | |
1809 | ||
1810 | ret = config_writer_write_element_string(writer, | |
1811 | config_element_type, config_domain_name); | |
fb198a11 JG |
1812 | if (ret) { |
1813 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1814 | goto end; | |
1815 | } | |
1816 | ||
1817 | buffer_type_string = get_buffer_type_string( | |
1818 | session->ust_session->buffer_type); | |
1819 | if (!buffer_type_string) { | |
1820 | ERR("Unsupported buffer type."); | |
1821 | ret = LTTNG_ERR_INVALID; | |
1822 | goto end; | |
1823 | } | |
1824 | ||
1825 | ret = config_writer_write_element_string(writer, | |
1826 | config_element_buffer_type, buffer_type_string); | |
1827 | if (ret) { | |
1828 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1829 | goto end; | |
1830 | } | |
1831 | ||
1832 | ret = config_writer_open_element(writer, config_element_channels); | |
1833 | if (ret) { | |
1834 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1835 | goto end; | |
1836 | } | |
1837 | ||
1838 | rcu_read_lock(); | |
1839 | cds_lfht_for_each_entry(session->ust_session->domain_global.channels->ht, | |
1840 | &iter.iter, node, node) { | |
fb198a11 | 1841 | ust_chan = caa_container_of(node, struct ltt_ust_channel, node); |
51755dc8 | 1842 | if (domain == ust_chan->domain) { |
fb198a11 JG |
1843 | ret = save_ust_channel(writer, ust_chan, session->ust_session); |
1844 | if (ret) { | |
1845 | rcu_read_unlock(); | |
1846 | goto end; | |
1847 | } | |
1848 | } | |
1849 | } | |
1850 | rcu_read_unlock(); | |
1851 | ||
1852 | /* /channels */ | |
1853 | ret = config_writer_close_element(writer); | |
1854 | if (ret) { | |
1855 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1856 | goto end; | |
1857 | } | |
51755dc8 | 1858 | |
e8fcabef | 1859 | if (domain == LTTNG_DOMAIN_UST) { |
847a5916 | 1860 | ret = config_writer_open_element(writer, |
e8fcabef | 1861 | config_element_trackers); |
847a5916 JR |
1862 | if (ret) { |
1863 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1864 | goto end; | |
1865 | } | |
1866 | ||
e8fcabef | 1867 | ret = save_pid_tracker(writer, session, LTTNG_DOMAIN_UST); |
847a5916 | 1868 | if (ret) { |
847a5916 JR |
1869 | goto end; |
1870 | } | |
1871 | ||
e8fcabef | 1872 | /* /trackers */ |
847a5916 JR |
1873 | ret = config_writer_close_element(writer); |
1874 | if (ret) { | |
847a5916 JR |
1875 | goto end; |
1876 | } | |
e8fcabef | 1877 | } |
847a5916 | 1878 | |
e8fcabef JG |
1879 | /* /domain */ |
1880 | ret = config_writer_close_element(writer); | |
1881 | if (ret) { | |
1882 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1883 | goto end; | |
847a5916 | 1884 | } |
e8fcabef | 1885 | |
847a5916 | 1886 | end: |
847a5916 JR |
1887 | return ret; |
1888 | } | |
1889 | ||
fb198a11 JG |
1890 | static |
1891 | int save_domains(struct config_writer *writer, struct ltt_session *session) | |
1892 | { | |
1893 | int ret = 0; | |
1894 | ||
1895 | assert(writer); | |
1896 | assert(session); | |
1897 | ||
1898 | if (!session->kernel_session && !session->ust_session) { | |
1899 | goto end; | |
1900 | } | |
1901 | ||
1902 | ret = config_writer_open_element(writer, config_element_domains); | |
1903 | if (ret) { | |
1904 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1905 | goto end; | |
1906 | } | |
1907 | ||
1908 | ||
1909 | if (session->kernel_session) { | |
1910 | ret = config_writer_open_element(writer, | |
1911 | config_element_domain); | |
1912 | if (ret) { | |
1913 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1914 | goto end; | |
1915 | } | |
1916 | ||
1917 | ret = save_kernel_session(writer, session); | |
1918 | if (ret) { | |
1919 | goto end; | |
1920 | } | |
1921 | ||
847a5916 JR |
1922 | ret = config_writer_open_element(writer, |
1923 | config_element_trackers); | |
1924 | if (ret) { | |
1925 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1926 | goto end; | |
1927 | } | |
1928 | ||
1929 | ret = save_pid_tracker(writer, session, LTTNG_DOMAIN_KERNEL); | |
1930 | if (ret) { | |
1931 | goto end; | |
1932 | } | |
1933 | ||
1934 | /* /trackers */ | |
1935 | ret = config_writer_close_element(writer); | |
1936 | if (ret) { | |
1937 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1938 | goto end; | |
1939 | } | |
fb198a11 JG |
1940 | /* /domain */ |
1941 | ret = config_writer_close_element(writer); | |
1942 | if (ret) { | |
1943 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1944 | goto end; | |
1945 | } | |
1946 | } | |
1947 | ||
1948 | if (session->ust_session) { | |
51755dc8 | 1949 | ret = save_ust_domain(writer, session, LTTNG_DOMAIN_UST); |
fb198a11 JG |
1950 | if (ret) { |
1951 | goto end; | |
1952 | } | |
1953 | ||
51755dc8 | 1954 | ret = save_ust_domain(writer, session, LTTNG_DOMAIN_JUL); |
fb198a11 | 1955 | if (ret) { |
fb198a11 JG |
1956 | goto end; |
1957 | } | |
fb198a11 | 1958 | |
51755dc8 JG |
1959 | ret = save_ust_domain(writer, session, LTTNG_DOMAIN_LOG4J); |
1960 | if (ret) { | |
1961 | goto end; | |
1962 | } | |
65d72c41 | 1963 | |
51755dc8 JG |
1964 | ret = save_ust_domain(writer, session, LTTNG_DOMAIN_PYTHON); |
1965 | if (ret) { | |
1966 | goto end; | |
fb198a11 JG |
1967 | } |
1968 | } | |
1969 | ||
1970 | /* /domains */ | |
1971 | ret = config_writer_close_element(writer); | |
1972 | if (ret) { | |
1973 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1974 | goto end; | |
1975 | } | |
1976 | end: | |
1977 | return ret; | |
1978 | } | |
1979 | ||
1980 | static | |
1981 | int save_consumer_output(struct config_writer *writer, | |
1982 | struct consumer_output *output) | |
1983 | { | |
1984 | int ret; | |
1985 | ||
1986 | assert(writer); | |
1987 | assert(output); | |
1988 | ||
1989 | ret = config_writer_open_element(writer, config_element_consumer_output); | |
1990 | if (ret) { | |
1991 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1992 | goto end; | |
1993 | } | |
1994 | ||
1995 | ret = config_writer_write_element_bool(writer, config_element_enabled, | |
1996 | output->enabled); | |
1997 | if (ret) { | |
1998 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1999 | goto end; | |
2000 | } | |
2001 | ||
2002 | ret = config_writer_open_element(writer, config_element_destination); | |
2003 | if (ret) { | |
2004 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2005 | goto end; | |
2006 | } | |
2007 | ||
2008 | switch (output->type) { | |
2009 | case CONSUMER_DST_LOCAL: | |
2010 | ret = config_writer_write_element_string(writer, | |
366a9222 | 2011 | config_element_path, output->dst.session_root_path); |
fb198a11 JG |
2012 | if (ret) { |
2013 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2014 | goto end; | |
2015 | } | |
2016 | break; | |
2017 | case CONSUMER_DST_NET: | |
2018 | { | |
2019 | char *uri; | |
2020 | ||
2021 | uri = zmalloc(PATH_MAX); | |
2022 | if (!uri) { | |
2023 | ret = LTTNG_ERR_NOMEM; | |
2024 | goto end; | |
2025 | } | |
2026 | ||
2027 | ret = config_writer_open_element(writer, config_element_net_output); | |
2028 | if (ret) { | |
2029 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2030 | goto end_net_output; | |
2031 | } | |
2032 | ||
2033 | if (output->dst.net.control_isset && | |
2034 | output->dst.net.data_isset) { | |
2035 | ret = uri_to_str_url(&output->dst.net.control, uri, PATH_MAX); | |
2036 | if (ret < 0) { | |
2037 | ret = LTTNG_ERR_INVALID; | |
2038 | goto end_net_output; | |
2039 | } | |
2040 | ||
2041 | ret = config_writer_write_element_string(writer, | |
2042 | config_element_control_uri, uri); | |
2043 | if (ret) { | |
2044 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2045 | goto end_net_output; | |
2046 | } | |
2047 | ||
2048 | ret = uri_to_str_url(&output->dst.net.data, uri, PATH_MAX); | |
2049 | if (ret < 0) { | |
2050 | ret = LTTNG_ERR_INVALID; | |
2051 | goto end_net_output; | |
2052 | } | |
2053 | ||
2054 | ret = config_writer_write_element_string(writer, | |
2055 | config_element_data_uri, uri); | |
2056 | if (ret) { | |
2057 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2058 | goto end_net_output; | |
2059 | } | |
2060 | ||
2061 | end_net_output: | |
2062 | free(uri); | |
2063 | if (ret) { | |
2064 | goto end; | |
2065 | } | |
2066 | } else { | |
2067 | ret = !output->dst.net.control_isset ? | |
2068 | LTTNG_ERR_URL_CTRL_MISS : | |
2069 | LTTNG_ERR_URL_DATA_MISS; | |
c39270e5 | 2070 | free(uri); |
fb198a11 JG |
2071 | goto end; |
2072 | } | |
2073 | ||
2074 | ret = config_writer_close_element(writer); | |
2075 | if (ret) { | |
2076 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2077 | goto end; | |
2078 | } | |
2079 | break; | |
2080 | } | |
2081 | default: | |
2082 | ERR("Unsupported consumer output type."); | |
2083 | ret = LTTNG_ERR_INVALID; | |
2084 | goto end; | |
2085 | } | |
2086 | ||
2087 | /* /destination */ | |
2088 | ret = config_writer_close_element(writer); | |
2089 | if (ret) { | |
2090 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2091 | goto end; | |
2092 | } | |
2093 | ||
2094 | /* /consumer_output */ | |
2095 | ret = config_writer_close_element(writer); | |
2096 | if (ret) { | |
2097 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2098 | goto end; | |
2099 | } | |
2100 | end: | |
2101 | return ret; | |
2102 | } | |
2103 | ||
2104 | static | |
2105 | int save_snapshot_outputs(struct config_writer *writer, | |
2106 | struct snapshot *snapshot) | |
2107 | { | |
2108 | int ret; | |
2109 | struct lttng_ht_iter iter; | |
2110 | struct snapshot_output *output; | |
2111 | ||
2112 | assert(writer); | |
2113 | assert(snapshot); | |
2114 | ||
2115 | ret = config_writer_open_element(writer, config_element_snapshot_outputs); | |
2116 | if (ret) { | |
2117 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2118 | goto end; | |
2119 | } | |
2120 | ||
2121 | rcu_read_lock(); | |
2122 | cds_lfht_for_each_entry(snapshot->output_ht->ht, &iter.iter, output, | |
2123 | node.node) { | |
2124 | ret = config_writer_open_element(writer, | |
2125 | config_element_output); | |
2126 | if (ret) { | |
2127 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2128 | goto end_unlock; | |
2129 | } | |
2130 | ||
2131 | ret = config_writer_write_element_string(writer, | |
2132 | config_element_name, output->name); | |
2133 | if (ret) { | |
2134 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2135 | goto end_unlock; | |
2136 | } | |
2137 | ||
2138 | ret = config_writer_write_element_unsigned_int(writer, | |
2139 | config_element_max_size, output->max_size); | |
2140 | if (ret) { | |
2141 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2142 | goto end_unlock; | |
2143 | } | |
2144 | ||
2145 | ret = save_consumer_output(writer, output->consumer); | |
2146 | if (ret) { | |
2147 | goto end_unlock; | |
2148 | } | |
2149 | ||
2150 | /* /output */ | |
2151 | ret = config_writer_close_element(writer); | |
2152 | if (ret) { | |
2153 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2154 | goto end_unlock; | |
2155 | } | |
2156 | } | |
2157 | rcu_read_unlock(); | |
2158 | ||
2159 | /* /snapshot_outputs */ | |
2160 | ret = config_writer_close_element(writer); | |
2161 | if (ret) { | |
2162 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2163 | goto end; | |
2164 | } | |
2165 | ||
2166 | end: | |
2167 | return ret; | |
2168 | end_unlock: | |
2169 | rcu_read_unlock(); | |
2170 | return ret; | |
2171 | } | |
2172 | ||
2173 | static | |
2174 | int save_session_output(struct config_writer *writer, | |
2175 | struct ltt_session *session) | |
2176 | { | |
2177 | int ret; | |
2178 | ||
2179 | assert(writer); | |
2180 | assert(session); | |
2181 | ||
2182 | if ((session->snapshot_mode && session->snapshot.nb_output == 0) || | |
2183 | (!session->snapshot_mode && !session->consumer)) { | |
2184 | /* Session is in no output mode */ | |
2185 | ret = 0; | |
2186 | goto end; | |
2187 | } | |
2188 | ||
2189 | ret = config_writer_open_element(writer, config_element_output); | |
2190 | if (ret) { | |
2191 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2192 | goto end; | |
2193 | } | |
2194 | ||
2195 | if (session->snapshot_mode) { | |
2196 | ret = save_snapshot_outputs(writer, &session->snapshot); | |
2197 | if (ret) { | |
2198 | goto end; | |
2199 | } | |
2200 | } else { | |
2201 | if (session->consumer) { | |
2202 | ret = save_consumer_output(writer, session->consumer); | |
2203 | if (ret) { | |
2204 | goto end; | |
2205 | } | |
2206 | } | |
2207 | } | |
2208 | ||
2209 | /* /output */ | |
2210 | ret = config_writer_close_element(writer); | |
2211 | if (ret) { | |
2212 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2213 | goto end; | |
2214 | } | |
2215 | end: | |
2216 | return ret; | |
2217 | } | |
2218 | ||
ce6176f2 JG |
2219 | static |
2220 | int save_session_rotation_schedule(struct config_writer *writer, | |
2221 | enum lttng_rotation_schedule_type type, uint64_t value) | |
2222 | { | |
2223 | int ret = 0; | |
2224 | const char *element_name; | |
2225 | const char *value_name; | |
2226 | ||
2227 | switch (type) { | |
2228 | case LTTNG_ROTATION_SCHEDULE_TYPE_PERIODIC: | |
2229 | element_name = config_element_rotation_schedule_periodic; | |
2230 | value_name = config_element_rotation_schedule_periodic_time_us; | |
2231 | break; | |
2232 | case LTTNG_ROTATION_SCHEDULE_TYPE_SIZE_THRESHOLD: | |
2233 | element_name = config_element_rotation_schedule_size_threshold; | |
2234 | value_name = config_element_rotation_schedule_size_threshold_bytes; | |
2235 | break; | |
2236 | default: | |
2237 | ret = -1; | |
2238 | goto end; | |
2239 | } | |
2240 | ||
2241 | ret = config_writer_open_element(writer, element_name); | |
2242 | if (ret) { | |
2243 | goto end; | |
2244 | } | |
2245 | ||
2246 | ret = config_writer_write_element_unsigned_int(writer, | |
2247 | value_name, value); | |
2248 | if (ret) { | |
2249 | goto end; | |
2250 | } | |
2251 | ||
2252 | /* Close schedule descriptor element. */ | |
2253 | ret = config_writer_close_element(writer); | |
2254 | if (ret) { | |
2255 | goto end; | |
2256 | } | |
2257 | end: | |
2258 | return ret; | |
2259 | } | |
2260 | ||
2261 | static | |
2262 | int save_session_rotation_schedules(struct config_writer *writer, | |
2263 | struct ltt_session *session) | |
2264 | { | |
2265 | int ret; | |
2266 | ||
2267 | ret = config_writer_open_element(writer, | |
2268 | config_element_rotation_schedules); | |
f829d17a JG |
2269 | if (ret) { |
2270 | goto end; | |
2271 | } | |
ce6176f2 JG |
2272 | if (session->rotate_timer_period) { |
2273 | ret = save_session_rotation_schedule(writer, | |
2274 | LTTNG_ROTATION_SCHEDULE_TYPE_PERIODIC, | |
2275 | session->rotate_timer_period); | |
2276 | if (ret) { | |
2277 | goto close_schedules; | |
2278 | } | |
2279 | } | |
2280 | if (session->rotate_size) { | |
2281 | ret = save_session_rotation_schedule(writer, | |
2282 | LTTNG_ROTATION_SCHEDULE_TYPE_SIZE_THRESHOLD, | |
2283 | session->rotate_size); | |
2284 | if (ret) { | |
2285 | goto close_schedules; | |
2286 | } | |
2287 | } | |
2288 | ||
2289 | close_schedules: | |
2290 | /* Close rotation schedules element. */ | |
2291 | ret = config_writer_close_element(writer); | |
2292 | if (ret) { | |
2293 | goto end; | |
2294 | } | |
2295 | end: | |
2296 | return ret; | |
2297 | } | |
2298 | ||
fb198a11 JG |
2299 | /* |
2300 | * Save the given session. | |
2301 | * | |
2302 | * Return 0 on success else a LTTNG_ERR* code. | |
2303 | */ | |
2304 | static | |
2305 | int save_session(struct ltt_session *session, | |
2306 | struct lttng_save_session_attr *attr, lttng_sock_cred *creds) | |
2307 | { | |
b45f9ad2 | 2308 | int ret, fd = -1; |
511653c3 | 2309 | char config_file_path[LTTNG_PATH_MAX]; |
fb198a11 JG |
2310 | size_t len; |
2311 | struct config_writer *writer = NULL; | |
2312 | size_t session_name_len; | |
2313 | const char *provided_path; | |
f376ad9c | 2314 | int file_open_flags = O_CREAT | O_WRONLY | O_TRUNC; |
fb198a11 JG |
2315 | |
2316 | assert(session); | |
2317 | assert(attr); | |
2318 | assert(creds); | |
2319 | ||
2320 | session_name_len = strlen(session->name); | |
95a29ab8 | 2321 | memset(config_file_path, 0, sizeof(config_file_path)); |
fb198a11 JG |
2322 | |
2323 | if (!session_access_ok(session, | |
2324 | LTTNG_SOCK_GET_UID_CRED(creds), | |
e32d7f27 | 2325 | LTTNG_SOCK_GET_GID_CRED(creds)) || session->destroyed) { |
fb198a11 JG |
2326 | ret = LTTNG_ERR_EPERM; |
2327 | goto end; | |
2328 | } | |
2329 | ||
2330 | provided_path = lttng_save_session_attr_get_output_url(attr); | |
2331 | if (provided_path) { | |
95a29ab8 | 2332 | DBG3("Save session in provided path %s", provided_path); |
fb198a11 | 2333 | len = strlen(provided_path); |
d2992717 | 2334 | if (len >= sizeof(config_file_path)) { |
fb198a11 JG |
2335 | ret = LTTNG_ERR_SET_URL; |
2336 | goto end; | |
2337 | } | |
511653c3 | 2338 | strncpy(config_file_path, provided_path, sizeof(config_file_path)); |
fb198a11 | 2339 | } else { |
7e078ad1 | 2340 | ssize_t ret_len; |
fb198a11 JG |
2341 | char *home_dir = utils_get_user_home_dir( |
2342 | LTTNG_SOCK_GET_UID_CRED(creds)); | |
2343 | if (!home_dir) { | |
2344 | ret = LTTNG_ERR_SET_URL; | |
2345 | goto end; | |
2346 | } | |
2347 | ||
d2992717 | 2348 | ret_len = snprintf(config_file_path, sizeof(config_file_path), |
fb198a11 JG |
2349 | DEFAULT_SESSION_HOME_CONFIGPATH, home_dir); |
2350 | free(home_dir); | |
7e078ad1 | 2351 | if (ret_len < 0) { |
fb198a11 JG |
2352 | PERROR("snprintf save session"); |
2353 | ret = LTTNG_ERR_SET_URL; | |
2354 | goto end; | |
2355 | } | |
7e078ad1 | 2356 | len = ret_len; |
fb198a11 JG |
2357 | } |
2358 | ||
2359 | /* | |
d2992717 DG |
2360 | * Check the path fits in the config file path dst including the '/' |
2361 | * followed by trailing .lttng extension and the NULL terminated string. | |
fb198a11 | 2362 | */ |
d2992717 DG |
2363 | if ((len + session_name_len + 2 + |
2364 | sizeof(DEFAULT_SESSION_CONFIG_FILE_EXTENSION)) | |
2365 | > sizeof(config_file_path)) { | |
fb198a11 JG |
2366 | ret = LTTNG_ERR_SET_URL; |
2367 | goto end; | |
2368 | } | |
2369 | ||
2370 | ret = run_as_mkdir_recursive(config_file_path, S_IRWXU | S_IRWXG, | |
2371 | LTTNG_SOCK_GET_UID_CRED(creds), LTTNG_SOCK_GET_GID_CRED(creds)); | |
2372 | if (ret) { | |
2373 | ret = LTTNG_ERR_SET_URL; | |
2374 | goto end; | |
2375 | } | |
2376 | ||
d2992717 DG |
2377 | /* |
2378 | * At this point, we know that everything fits in the buffer. Validation | |
2379 | * was done just above. | |
2380 | */ | |
fb198a11 | 2381 | config_file_path[len++] = '/'; |
511653c3 | 2382 | strncpy(config_file_path + len, session->name, sizeof(config_file_path) - len); |
fb198a11 JG |
2383 | len += session_name_len; |
2384 | strcpy(config_file_path + len, DEFAULT_SESSION_CONFIG_FILE_EXTENSION); | |
95a29ab8 DG |
2385 | len += sizeof(DEFAULT_SESSION_CONFIG_FILE_EXTENSION); |
2386 | config_file_path[len] = '\0'; | |
fb198a11 | 2387 | |
f376ad9c JG |
2388 | if (!attr->overwrite) { |
2389 | file_open_flags |= O_EXCL; | |
fb198a11 JG |
2390 | } |
2391 | ||
f376ad9c | 2392 | fd = run_as_open(config_file_path, file_open_flags, |
fb198a11 JG |
2393 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP, |
2394 | LTTNG_SOCK_GET_UID_CRED(creds), LTTNG_SOCK_GET_GID_CRED(creds)); | |
2395 | if (fd < 0) { | |
2396 | PERROR("Could not create configuration file"); | |
f376ad9c JG |
2397 | switch (errno) { |
2398 | case EEXIST: | |
2399 | ret = LTTNG_ERR_SAVE_FILE_EXIST; | |
2400 | break; | |
2401 | case EACCES: | |
2402 | ret = LTTNG_ERR_EPERM; | |
2403 | break; | |
2404 | default: | |
2405 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2406 | break; | |
2407 | } | |
fb198a11 JG |
2408 | goto end; |
2409 | } | |
2410 | ||
705bb62f | 2411 | writer = config_writer_create(fd, 1); |
fb198a11 JG |
2412 | if (!writer) { |
2413 | ret = LTTNG_ERR_NOMEM; | |
2414 | goto end; | |
2415 | } | |
2416 | ||
2417 | ret = config_writer_open_element(writer, config_element_sessions); | |
2418 | if (ret) { | |
2419 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2420 | goto end; | |
2421 | } | |
2422 | ||
2423 | ret = config_writer_open_element(writer, config_element_session); | |
2424 | if (ret) { | |
2425 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2426 | goto end; | |
2427 | } | |
2428 | ||
2429 | ret = config_writer_write_element_string(writer, config_element_name, | |
2430 | session->name); | |
2431 | if (ret) { | |
2432 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2433 | goto end; | |
2434 | } | |
2435 | ||
9e7c9f56 JR |
2436 | if(session->shm_path[0] != '\0') { |
2437 | ret = config_writer_write_element_string(writer, | |
2438 | config_element_shared_memory_path, | |
2439 | session->shm_path); | |
2440 | if (ret) { | |
2441 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2442 | goto end; | |
2443 | } | |
2444 | } | |
2445 | ||
fb198a11 JG |
2446 | ret = save_domains(writer, session); |
2447 | if (ret) { | |
2448 | goto end; | |
2449 | } | |
2450 | ||
2451 | ret = config_writer_write_element_bool(writer, config_element_started, | |
8382cf6f | 2452 | session->active); |
fb198a11 JG |
2453 | if (ret) { |
2454 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2455 | goto end; | |
2456 | } | |
2457 | ||
329f3443 JD |
2458 | if (session->snapshot_mode || session->live_timer || |
2459 | session->rotate_timer_period || session->rotate_size) { | |
fb198a11 JG |
2460 | ret = config_writer_open_element(writer, config_element_attributes); |
2461 | if (ret) { | |
2462 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2463 | goto end; | |
2464 | } | |
2465 | ||
2466 | if (session->snapshot_mode) { | |
2467 | ret = config_writer_write_element_bool(writer, | |
2468 | config_element_snapshot_mode, 1); | |
2469 | if (ret) { | |
2470 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2471 | goto end; | |
2472 | } | |
329f3443 | 2473 | } else if (session->live_timer) { |
d98ad589 | 2474 | ret = config_writer_write_element_unsigned_int(writer, |
fb198a11 JG |
2475 | config_element_live_timer_interval, session->live_timer); |
2476 | if (ret) { | |
2477 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2478 | goto end; | |
2479 | } | |
2480 | } | |
ce6176f2 JG |
2481 | if (session->rotate_timer_period || session->rotate_size) { |
2482 | ret = save_session_rotation_schedules(writer, | |
2483 | session); | |
329f3443 JD |
2484 | if (ret) { |
2485 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2486 | goto end; | |
2487 | } | |
2488 | } | |
fb198a11 JG |
2489 | |
2490 | /* /attributes */ | |
2491 | ret = config_writer_close_element(writer); | |
2492 | if (ret) { | |
2493 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2494 | goto end; | |
2495 | } | |
2496 | } | |
2497 | ||
2498 | ret = save_session_output(writer, session); | |
2499 | if (ret) { | |
2500 | goto end; | |
2501 | } | |
2502 | ||
2503 | /* /session */ | |
2504 | ret = config_writer_close_element(writer); | |
2505 | if (ret) { | |
2506 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2507 | goto end; | |
2508 | } | |
2509 | ||
2510 | /* /sessions */ | |
2511 | ret = config_writer_close_element(writer); | |
2512 | if (ret) { | |
2513 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2514 | goto end; | |
2515 | } | |
2516 | end: | |
2517 | if (writer && config_writer_destroy(writer)) { | |
2518 | /* Preserve the original error code */ | |
2519 | ret = ret ? ret : LTTNG_ERR_SAVE_IO_FAIL; | |
2520 | } | |
2521 | if (ret) { | |
2522 | /* Delete file in case of error */ | |
b45f9ad2 | 2523 | if ((fd >= 0) && unlink(config_file_path)) { |
fb198a11 JG |
2524 | PERROR("Unlinking XML session configuration."); |
2525 | } | |
2526 | } | |
2527 | ||
b45f9ad2 | 2528 | if (fd >= 0) { |
1d12100d JR |
2529 | ret = close(fd); |
2530 | if (ret) { | |
2531 | PERROR("Closing XML session configuration"); | |
2532 | } | |
2533 | } | |
2534 | ||
fb198a11 JG |
2535 | return ret; |
2536 | } | |
2537 | ||
2538 | int cmd_save_sessions(struct lttng_save_session_attr *attr, | |
2539 | lttng_sock_cred *creds) | |
2540 | { | |
2541 | int ret; | |
2542 | const char *session_name; | |
2543 | struct ltt_session *session; | |
2544 | ||
2545 | session_lock_list(); | |
2546 | ||
2547 | session_name = lttng_save_session_attr_get_session_name(attr); | |
2548 | if (session_name) { | |
2549 | session = session_find_by_name(session_name); | |
2550 | if (!session) { | |
2551 | ret = LTTNG_ERR_SESS_NOT_FOUND; | |
2552 | goto end; | |
2553 | } | |
2554 | ||
2555 | session_lock(session); | |
2556 | ret = save_session(session, attr, creds); | |
2557 | session_unlock(session); | |
e32d7f27 | 2558 | session_put(session); |
fb198a11 JG |
2559 | if (ret) { |
2560 | goto end; | |
2561 | } | |
2562 | } else { | |
2563 | struct ltt_session_list *list = session_get_list(); | |
2564 | ||
2565 | cds_list_for_each_entry(session, &list->head, list) { | |
e32d7f27 JG |
2566 | if (!session_get(session)) { |
2567 | continue; | |
2568 | } | |
fb198a11 JG |
2569 | session_lock(session); |
2570 | ret = save_session(session, attr, creds); | |
2571 | session_unlock(session); | |
e32d7f27 | 2572 | session_put(session); |
fb198a11 JG |
2573 | /* Don't abort if we don't have the required permissions. */ |
2574 | if (ret && ret != LTTNG_ERR_EPERM) { | |
2575 | goto end; | |
2576 | } | |
2577 | } | |
2578 | } | |
2579 | ret = LTTNG_OK; | |
2580 | ||
2581 | end: | |
2582 | session_unlock_list(); | |
2583 | return ret; | |
2584 | } |