Commit | Line | Data |
---|---|---|
fb198a11 | 1 | /* |
ab5be9fa | 2 | * Copyright (C) 2014 Jérémie Galarneau <jeremie.galarneau@efficios.com> |
fb198a11 | 3 | * |
ab5be9fa | 4 | * SPDX-License-Identifier: GPL-2.0-only |
fb198a11 | 5 | * |
fb198a11 JG |
6 | */ |
7 | ||
6c1c0768 | 8 | #define _LGPL_SOURCE |
fb198a11 JG |
9 | #include <assert.h> |
10 | #include <inttypes.h> | |
11 | #include <string.h> | |
12 | #include <urcu/uatomic.h> | |
13 | #include <unistd.h> | |
14 | ||
15 | #include <common/defaults.h> | |
16 | #include <common/error.h> | |
f40ef1d5 | 17 | #include <common/config/session-config.h> |
fb198a11 JG |
18 | #include <common/utils.h> |
19 | #include <common/runas.h> | |
20 | #include <lttng/save-internal.h> | |
21 | ||
847a5916 | 22 | #include "kernel.h" |
fb198a11 JG |
23 | #include "save.h" |
24 | #include "session.h" | |
0dbc2034 | 25 | #include "lttng-syscall.h" |
fb198a11 | 26 | #include "trace-ust.h" |
51755dc8 | 27 | #include "agent.h" |
fb198a11 | 28 | |
55c9e7ca | 29 | /* Return LTTNG_OK on success else a LTTNG_ERR* code. */ |
fb198a11 JG |
30 | static |
31 | int save_kernel_channel_attributes(struct config_writer *writer, | |
32 | struct lttng_channel_attr *attr) | |
33 | { | |
34 | int ret; | |
35 | ||
36 | ret = config_writer_write_element_string(writer, | |
37 | config_element_overwrite_mode, | |
38 | attr->overwrite ? config_overwrite_mode_overwrite : | |
39 | config_overwrite_mode_discard); | |
40 | if (ret) { | |
55c9e7ca | 41 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
fb198a11 JG |
42 | goto end; |
43 | } | |
44 | ||
45 | ret = config_writer_write_element_unsigned_int(writer, | |
46 | config_element_subbuf_size, attr->subbuf_size); | |
47 | if (ret) { | |
55c9e7ca | 48 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
fb198a11 JG |
49 | goto end; |
50 | } | |
51 | ||
52 | ret = config_writer_write_element_unsigned_int(writer, | |
53 | config_element_num_subbuf, | |
54 | attr->num_subbuf); | |
55 | if (ret) { | |
55c9e7ca | 56 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
fb198a11 JG |
57 | goto end; |
58 | } | |
59 | ||
60 | ret = config_writer_write_element_unsigned_int(writer, | |
61 | config_element_switch_timer_interval, | |
62 | attr->switch_timer_interval); | |
63 | if (ret) { | |
55c9e7ca | 64 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
fb198a11 JG |
65 | goto end; |
66 | } | |
67 | ||
68 | ret = config_writer_write_element_unsigned_int(writer, | |
69 | config_element_read_timer_interval, | |
70 | attr->read_timer_interval); | |
71 | if (ret) { | |
55c9e7ca | 72 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
fb198a11 JG |
73 | goto end; |
74 | } | |
75 | ||
76 | ret = config_writer_write_element_string(writer, | |
77 | config_element_output_type, | |
78 | attr->output == LTTNG_EVENT_SPLICE ? | |
79 | config_output_type_splice : config_output_type_mmap); | |
80 | if (ret) { | |
55c9e7ca | 81 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
fb198a11 JG |
82 | goto end; |
83 | } | |
84 | ||
85 | ret = config_writer_write_element_unsigned_int(writer, | |
86 | config_element_tracefile_size, attr->tracefile_size); | |
87 | if (ret) { | |
55c9e7ca | 88 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
fb198a11 JG |
89 | goto end; |
90 | } | |
91 | ||
92 | ret = config_writer_write_element_unsigned_int(writer, | |
93 | config_element_tracefile_count, | |
94 | attr->tracefile_count); | |
95 | if (ret) { | |
55c9e7ca | 96 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
fb198a11 JG |
97 | goto end; |
98 | } | |
99 | ||
100 | ret = config_writer_write_element_unsigned_int(writer, | |
101 | config_element_live_timer_interval, | |
102 | attr->live_timer_interval); | |
103 | if (ret) { | |
55c9e7ca | 104 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
fb198a11 JG |
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) { | |
55c9e7ca | 116 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
4fc2b126 JR |
117 | goto end; |
118 | } | |
275472aa JR |
119 | |
120 | ret = config_writer_write_element_signed_int(writer, | |
121 | config_element_blocking_timeout, | |
122 | ext->blocking_timeout); | |
123 | if (ret) { | |
55c9e7ca | 124 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
275472aa JR |
125 | goto end; |
126 | } | |
4fc2b126 JR |
127 | } |
128 | ||
55c9e7ca | 129 | ret = LTTNG_OK; |
fb198a11 | 130 | end: |
55c9e7ca | 131 | return ret; |
fb198a11 JG |
132 | } |
133 | ||
55c9e7ca | 134 | /* Return LTTNG_OK on success else a LTTNG_ERR* code. */ |
fb198a11 JG |
135 | static |
136 | int save_ust_channel_attributes(struct config_writer *writer, | |
137 | struct lttng_ust_channel_attr *attr) | |
138 | { | |
139 | int ret; | |
4fc2b126 | 140 | struct ltt_ust_channel *channel = NULL; |
fb198a11 JG |
141 | |
142 | ret = config_writer_write_element_string(writer, | |
143 | config_element_overwrite_mode, | |
144 | attr->overwrite ? config_overwrite_mode_overwrite : | |
145 | config_overwrite_mode_discard); | |
146 | if (ret) { | |
55c9e7ca | 147 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
fb198a11 JG |
148 | goto end; |
149 | } | |
150 | ||
151 | ret = config_writer_write_element_unsigned_int(writer, | |
152 | config_element_subbuf_size, attr->subbuf_size); | |
153 | if (ret) { | |
55c9e7ca | 154 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
fb198a11 JG |
155 | goto end; |
156 | } | |
157 | ||
158 | ret = config_writer_write_element_unsigned_int(writer, | |
159 | config_element_num_subbuf, | |
160 | attr->num_subbuf); | |
161 | if (ret) { | |
55c9e7ca | 162 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
fb198a11 JG |
163 | goto end; |
164 | } | |
165 | ||
166 | ret = config_writer_write_element_unsigned_int(writer, | |
167 | config_element_switch_timer_interval, | |
168 | attr->switch_timer_interval); | |
169 | if (ret) { | |
55c9e7ca | 170 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
fb198a11 JG |
171 | goto end; |
172 | } | |
173 | ||
174 | ret = config_writer_write_element_unsigned_int(writer, | |
175 | config_element_read_timer_interval, | |
176 | attr->read_timer_interval); | |
177 | if (ret) { | |
55c9e7ca | 178 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
fb198a11 JG |
179 | goto end; |
180 | } | |
181 | ||
182 | ret = config_writer_write_element_string(writer, | |
183 | config_element_output_type, | |
184 | attr->output == LTTNG_UST_MMAP ? | |
185 | config_output_type_mmap : config_output_type_splice); | |
186 | if (ret) { | |
55c9e7ca | 187 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
fb198a11 JG |
188 | goto end; |
189 | } | |
4fc2b126 | 190 | |
275472aa JR |
191 | ret = config_writer_write_element_signed_int(writer, |
192 | config_element_blocking_timeout, | |
193 | attr->u.s.blocking_timeout); | |
194 | if (ret) { | |
55c9e7ca | 195 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
275472aa JR |
196 | goto end; |
197 | } | |
198 | ||
4fc2b126 JR |
199 | /* |
200 | * Fetch the monitor timer which is located in the parent of | |
201 | * lttng_ust_channel_attr | |
202 | */ | |
203 | channel = caa_container_of(attr, struct ltt_ust_channel, attr); | |
204 | ret = config_writer_write_element_unsigned_int(writer, | |
205 | config_element_monitor_timer_interval, | |
206 | channel->monitor_timer_interval); | |
207 | if (ret) { | |
55c9e7ca | 208 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
4fc2b126 JR |
209 | goto end; |
210 | } | |
211 | ||
55c9e7ca | 212 | ret = LTTNG_OK; |
fb198a11 | 213 | end: |
55c9e7ca | 214 | return ret; |
fb198a11 JG |
215 | } |
216 | ||
217 | static | |
218 | const char *get_kernel_instrumentation_string( | |
219 | enum lttng_kernel_instrumentation instrumentation) | |
220 | { | |
221 | const char *instrumentation_string; | |
222 | ||
223 | switch (instrumentation) { | |
224 | case LTTNG_KERNEL_ALL: | |
225 | instrumentation_string = config_event_type_all; | |
226 | break; | |
227 | case LTTNG_KERNEL_TRACEPOINT: | |
228 | instrumentation_string = config_event_type_tracepoint; | |
229 | break; | |
230 | case LTTNG_KERNEL_KPROBE: | |
9d82c4c2 | 231 | instrumentation_string = config_event_type_probe; |
fb198a11 | 232 | break; |
c1e83fb4 FD |
233 | case LTTNG_KERNEL_UPROBE: |
234 | instrumentation_string = config_event_type_userspace_probe; | |
235 | break; | |
fb198a11 | 236 | case LTTNG_KERNEL_FUNCTION: |
9d82c4c2 | 237 | instrumentation_string = config_event_type_function_entry; |
fb198a11 JG |
238 | break; |
239 | case LTTNG_KERNEL_KRETPROBE: | |
9d82c4c2 | 240 | instrumentation_string = config_event_type_function; |
fb198a11 JG |
241 | break; |
242 | case LTTNG_KERNEL_NOOP: | |
243 | instrumentation_string = config_event_type_noop; | |
244 | break; | |
245 | case LTTNG_KERNEL_SYSCALL: | |
246 | instrumentation_string = config_event_type_syscall; | |
247 | break; | |
248 | default: | |
249 | instrumentation_string = NULL; | |
250 | } | |
251 | ||
252 | return instrumentation_string; | |
253 | } | |
254 | ||
255 | static | |
256 | const char *get_kernel_context_type_string( | |
257 | enum lttng_kernel_context_type context_type) | |
258 | { | |
259 | const char *context_type_string; | |
260 | ||
261 | switch (context_type) { | |
262 | case LTTNG_KERNEL_CONTEXT_PID: | |
263 | context_type_string = config_event_context_pid; | |
264 | break; | |
265 | case LTTNG_KERNEL_CONTEXT_PROCNAME: | |
266 | context_type_string = config_event_context_procname; | |
267 | break; | |
268 | case LTTNG_KERNEL_CONTEXT_PRIO: | |
269 | context_type_string = config_event_context_prio; | |
270 | break; | |
271 | case LTTNG_KERNEL_CONTEXT_NICE: | |
272 | context_type_string = config_event_context_nice; | |
273 | break; | |
274 | case LTTNG_KERNEL_CONTEXT_VPID: | |
275 | context_type_string = config_event_context_vpid; | |
276 | break; | |
277 | case LTTNG_KERNEL_CONTEXT_TID: | |
278 | context_type_string = config_event_context_tid; | |
279 | break; | |
280 | case LTTNG_KERNEL_CONTEXT_VTID: | |
281 | context_type_string = config_event_context_vtid; | |
282 | break; | |
283 | case LTTNG_KERNEL_CONTEXT_PPID: | |
284 | context_type_string = config_event_context_ppid; | |
285 | break; | |
286 | case LTTNG_KERNEL_CONTEXT_VPPID: | |
287 | context_type_string = config_event_context_vppid; | |
288 | break; | |
289 | case LTTNG_KERNEL_CONTEXT_HOSTNAME: | |
290 | context_type_string = config_event_context_hostname; | |
291 | break; | |
1ae5e83e JD |
292 | case LTTNG_KERNEL_CONTEXT_INTERRUPTIBLE: |
293 | context_type_string = config_event_context_interruptible; | |
294 | break; | |
295 | case LTTNG_KERNEL_CONTEXT_PREEMPTIBLE: | |
296 | context_type_string = config_event_context_preemptible; | |
297 | break; | |
298 | case LTTNG_KERNEL_CONTEXT_NEED_RESCHEDULE: | |
299 | context_type_string = config_event_context_need_reschedule; | |
300 | break; | |
301 | case LTTNG_KERNEL_CONTEXT_MIGRATABLE: | |
302 | context_type_string = config_event_context_migratable; | |
303 | break; | |
16c4c991 FD |
304 | case LTTNG_KERNEL_CONTEXT_CALLSTACK_USER: |
305 | context_type_string = config_event_context_callstack_user; | |
306 | break; | |
307 | case LTTNG_KERNEL_CONTEXT_CALLSTACK_KERNEL: | |
308 | context_type_string = config_event_context_callstack_kernel; | |
309 | break; | |
40e14884 MJ |
310 | case LTTNG_KERNEL_CONTEXT_CGROUP_NS: |
311 | context_type_string = config_event_context_cgroup_ns; | |
312 | break; | |
313 | case LTTNG_KERNEL_CONTEXT_IPC_NS: | |
314 | context_type_string = config_event_context_ipc_ns; | |
315 | break; | |
316 | case LTTNG_KERNEL_CONTEXT_MNT_NS: | |
317 | context_type_string = config_event_context_mnt_ns; | |
318 | break; | |
319 | case LTTNG_KERNEL_CONTEXT_NET_NS: | |
320 | context_type_string = config_event_context_net_ns; | |
321 | break; | |
322 | case LTTNG_KERNEL_CONTEXT_PID_NS: | |
323 | context_type_string = config_event_context_pid_ns; | |
324 | break; | |
d37ac3cd MJ |
325 | case LTTNG_KERNEL_CONTEXT_TIME_NS: |
326 | context_type_string = config_event_context_time_ns; | |
327 | break; | |
40e14884 MJ |
328 | case LTTNG_KERNEL_CONTEXT_USER_NS: |
329 | context_type_string = config_event_context_user_ns; | |
330 | break; | |
331 | case LTTNG_KERNEL_CONTEXT_UTS_NS: | |
332 | context_type_string = config_event_context_uts_ns; | |
333 | break; | |
499cbfa1 MJ |
334 | case LTTNG_KERNEL_CONTEXT_UID: |
335 | context_type_string = config_event_context_uid; | |
336 | break; | |
337 | case LTTNG_KERNEL_CONTEXT_EUID: | |
338 | context_type_string = config_event_context_euid; | |
339 | break; | |
340 | case LTTNG_KERNEL_CONTEXT_SUID: | |
341 | context_type_string = config_event_context_suid; | |
342 | break; | |
343 | case LTTNG_KERNEL_CONTEXT_GID: | |
344 | context_type_string = config_event_context_gid; | |
345 | break; | |
346 | case LTTNG_KERNEL_CONTEXT_EGID: | |
347 | context_type_string = config_event_context_egid; | |
348 | break; | |
349 | case LTTNG_KERNEL_CONTEXT_SGID: | |
350 | context_type_string = config_event_context_sgid; | |
351 | break; | |
352 | case LTTNG_KERNEL_CONTEXT_VUID: | |
353 | context_type_string = config_event_context_vuid; | |
354 | break; | |
355 | case LTTNG_KERNEL_CONTEXT_VEUID: | |
356 | context_type_string = config_event_context_veuid; | |
357 | break; | |
358 | case LTTNG_KERNEL_CONTEXT_VSUID: | |
359 | context_type_string = config_event_context_vsuid; | |
360 | break; | |
361 | case LTTNG_KERNEL_CONTEXT_VGID: | |
362 | context_type_string = config_event_context_vgid; | |
363 | break; | |
364 | case LTTNG_KERNEL_CONTEXT_VEGID: | |
365 | context_type_string = config_event_context_vegid; | |
366 | break; | |
367 | case LTTNG_KERNEL_CONTEXT_VSGID: | |
368 | context_type_string = config_event_context_vsgid; | |
369 | break; | |
fb198a11 JG |
370 | default: |
371 | context_type_string = NULL; | |
372 | } | |
373 | ||
374 | return context_type_string; | |
375 | } | |
376 | ||
377 | static | |
378 | const char *get_ust_context_type_string( | |
379 | enum lttng_ust_context_type context_type) | |
380 | { | |
381 | const char *context_type_string; | |
382 | ||
383 | switch (context_type) { | |
384 | case LTTNG_UST_CONTEXT_PROCNAME: | |
385 | context_type_string = config_event_context_procname; | |
386 | break; | |
387 | case LTTNG_UST_CONTEXT_VPID: | |
388 | context_type_string = config_event_context_vpid; | |
389 | break; | |
390 | case LTTNG_UST_CONTEXT_VTID: | |
391 | context_type_string = config_event_context_vtid; | |
392 | break; | |
393 | case LTTNG_UST_CONTEXT_IP: | |
394 | context_type_string = config_event_context_ip; | |
395 | break; | |
396 | case LTTNG_UST_CONTEXT_PTHREAD_ID: | |
397 | context_type_string = config_event_context_pthread_id; | |
398 | break; | |
045fc617 JG |
399 | case LTTNG_UST_CONTEXT_APP_CONTEXT: |
400 | context_type_string = config_event_context_app; | |
401 | break; | |
f17b8732 MJ |
402 | case LTTNG_UST_CONTEXT_CGROUP_NS: |
403 | context_type_string = config_event_context_cgroup_ns; | |
404 | break; | |
405 | case LTTNG_UST_CONTEXT_IPC_NS: | |
406 | context_type_string = config_event_context_ipc_ns; | |
407 | break; | |
408 | case LTTNG_UST_CONTEXT_MNT_NS: | |
409 | context_type_string = config_event_context_mnt_ns; | |
410 | break; | |
411 | case LTTNG_UST_CONTEXT_NET_NS: | |
412 | context_type_string = config_event_context_net_ns; | |
413 | break; | |
d37ac3cd MJ |
414 | case LTTNG_UST_CONTEXT_TIME_NS: |
415 | context_type_string = config_event_context_time_ns; | |
416 | break; | |
f17b8732 MJ |
417 | case LTTNG_UST_CONTEXT_PID_NS: |
418 | context_type_string = config_event_context_pid_ns; | |
419 | break; | |
420 | case LTTNG_UST_CONTEXT_USER_NS: | |
421 | context_type_string = config_event_context_user_ns; | |
422 | break; | |
423 | case LTTNG_UST_CONTEXT_UTS_NS: | |
424 | context_type_string = config_event_context_uts_ns; | |
425 | break; | |
4fc59cb8 MJ |
426 | case LTTNG_UST_CONTEXT_VUID: |
427 | context_type_string = config_event_context_vuid; | |
428 | break; | |
429 | case LTTNG_UST_CONTEXT_VEUID: | |
430 | context_type_string = config_event_context_veuid; | |
431 | break; | |
432 | case LTTNG_UST_CONTEXT_VSUID: | |
433 | context_type_string = config_event_context_vsuid; | |
434 | break; | |
435 | case LTTNG_UST_CONTEXT_VGID: | |
436 | context_type_string = config_event_context_vgid; | |
437 | break; | |
438 | case LTTNG_UST_CONTEXT_VEGID: | |
439 | context_type_string = config_event_context_vegid; | |
440 | break; | |
441 | case LTTNG_UST_CONTEXT_VSGID: | |
442 | context_type_string = config_event_context_vsgid; | |
443 | break; | |
e885a367 | 444 | case LTTNG_UST_CONTEXT_PERF_THREAD_COUNTER: |
14ce5bd8 JG |
445 | /* |
446 | * Error, should not be stored in the XML, perf contexts | |
447 | * are stored as a node of type event_perf_context_type. | |
448 | */ | |
fb198a11 JG |
449 | default: |
450 | context_type_string = NULL; | |
e885a367 | 451 | break; |
fb198a11 JG |
452 | } |
453 | ||
454 | return context_type_string; | |
455 | } | |
456 | ||
457 | static | |
458 | const char *get_buffer_type_string( | |
459 | enum lttng_buffer_type buffer_type) | |
460 | { | |
461 | const char *buffer_type_string; | |
462 | ||
463 | switch (buffer_type) { | |
464 | case LTTNG_BUFFER_PER_PID: | |
465 | buffer_type_string = config_buffer_type_per_pid; | |
466 | break; | |
467 | case LTTNG_BUFFER_PER_UID: | |
468 | buffer_type_string = config_buffer_type_per_uid; | |
469 | break; | |
470 | case LTTNG_BUFFER_GLOBAL: | |
471 | buffer_type_string = config_buffer_type_global; | |
472 | break; | |
473 | default: | |
474 | buffer_type_string = NULL; | |
475 | } | |
476 | ||
477 | return buffer_type_string; | |
478 | } | |
479 | ||
480 | static | |
481 | const char *get_loglevel_type_string( | |
482 | enum lttng_ust_loglevel_type loglevel_type) | |
483 | { | |
484 | const char *loglevel_type_string; | |
485 | ||
486 | switch (loglevel_type) { | |
487 | case LTTNG_UST_LOGLEVEL_ALL: | |
488 | loglevel_type_string = config_loglevel_type_all; | |
489 | break; | |
490 | case LTTNG_UST_LOGLEVEL_RANGE: | |
491 | loglevel_type_string = config_loglevel_type_range; | |
492 | break; | |
493 | case LTTNG_UST_LOGLEVEL_SINGLE: | |
494 | loglevel_type_string = config_loglevel_type_single; | |
495 | break; | |
496 | default: | |
497 | loglevel_type_string = NULL; | |
498 | } | |
499 | ||
500 | return loglevel_type_string; | |
501 | } | |
502 | ||
55c9e7ca | 503 | /* Return LTTNG_OK on success else a LTTNG_ERR* code. */ |
fb198a11 | 504 | static |
83712c39 FD |
505 | int save_kernel_function_event(struct config_writer *writer, |
506 | struct ltt_kernel_event *event) | |
507 | { | |
508 | int ret; | |
509 | ||
510 | ret = config_writer_open_element(writer, config_element_function_attributes); | |
511 | if (ret) { | |
512 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
513 | goto end; | |
514 | } | |
515 | ||
516 | ret = config_writer_write_element_string(writer, config_element_name, | |
517 | event->event->u.ftrace.symbol_name); | |
518 | if (ret) { | |
519 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
520 | goto end; | |
521 | } | |
522 | ||
523 | /* /function attributes */ | |
524 | ret = config_writer_close_element(writer); | |
525 | if (ret) { | |
526 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
527 | goto end; | |
528 | } | |
529 | end: | |
530 | return ret; | |
531 | } | |
532 | ||
533 | static | |
534 | int save_kernel_kprobe_event(struct config_writer *writer, | |
535 | struct ltt_kernel_event *event) | |
536 | { | |
537 | int ret; | |
538 | const char *symbol_name; | |
539 | uint64_t addr; | |
540 | uint64_t offset; | |
541 | ||
542 | switch (event->event->instrumentation) { | |
543 | case LTTNG_KERNEL_KPROBE: | |
544 | /* | |
545 | * Comments in lttng-kernel.h mention that | |
546 | * either addr or symbol_name are set, not both. | |
547 | */ | |
548 | addr = event->event->u.kprobe.addr; | |
549 | offset = event->event->u.kprobe.offset; | |
550 | symbol_name = addr ? NULL : event->event->u.kprobe.symbol_name; | |
551 | break; | |
552 | case LTTNG_KERNEL_KRETPROBE: | |
553 | addr = event->event->u.kretprobe.addr; | |
554 | offset = event->event->u.kretprobe.offset; | |
c1e83fb4 | 555 | symbol_name = addr ? NULL : event->event->u.kretprobe.symbol_name; |
83712c39 FD |
556 | break; |
557 | default: | |
558 | assert(1); | |
c1e83fb4 FD |
559 | ERR("Unsupported kernel instrumentation type."); |
560 | ret = LTTNG_ERR_INVALID; | |
561 | goto end; | |
83712c39 FD |
562 | } |
563 | ||
564 | ret = config_writer_open_element(writer, config_element_probe_attributes); | |
565 | if (ret) { | |
566 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
567 | goto end; | |
568 | } | |
569 | ||
c1e83fb4 FD |
570 | if (addr) { |
571 | ret = config_writer_write_element_unsigned_int( writer, | |
572 | config_element_address, addr); | |
573 | if (ret) { | |
574 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
575 | goto end; | |
576 | } | |
577 | } else if (symbol_name) { | |
83712c39 FD |
578 | ret = config_writer_write_element_string(writer, |
579 | config_element_symbol_name, symbol_name); | |
580 | if (ret) { | |
581 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
582 | goto end; | |
583 | } | |
c1e83fb4 FD |
584 | /* If the offset is non-zero, write it.*/ |
585 | if (offset) { | |
586 | ret = config_writer_write_element_unsigned_int(writer, | |
587 | config_element_offset, offset); | |
588 | if (ret) { | |
589 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
590 | goto end; | |
591 | } | |
592 | } | |
593 | } else { | |
594 | /* | |
595 | * This really should not happen as we are either setting the | |
596 | * address or the symbol above. | |
597 | */ | |
598 | ERR("Invalid probe/function description."); | |
599 | ret = LTTNG_ERR_INVALID; | |
600 | goto end; | |
83712c39 FD |
601 | } |
602 | ||
c1e83fb4 FD |
603 | |
604 | ret = config_writer_close_element(writer); | |
605 | if (ret) { | |
606 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
607 | goto end; | |
608 | } | |
609 | end: | |
610 | return ret; | |
611 | } | |
612 | ||
613 | /* | |
614 | * Save the userspace probe tracepoint event associated with the event to the | |
615 | * config writer. | |
616 | */ | |
617 | static | |
618 | int save_kernel_userspace_probe_tracepoint_event(struct config_writer *writer, | |
619 | struct ltt_kernel_event *event) | |
620 | { | |
621 | int ret = 0; | |
622 | const char *probe_name, *provider_name, *binary_path; | |
87597c2c JG |
623 | const struct lttng_userspace_probe_location *userspace_probe_location; |
624 | const struct lttng_userspace_probe_location_lookup_method *lookup_method; | |
c1e83fb4 FD |
625 | enum lttng_userspace_probe_location_lookup_method_type lookup_type; |
626 | ||
627 | /* Get userspace probe location from the event. */ | |
628 | userspace_probe_location = event->userspace_probe_location; | |
629 | if (!userspace_probe_location) { | |
630 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
631 | goto end; | |
632 | } | |
633 | ||
634 | /* Get lookup method and lookup method type. */ | |
635 | lookup_method = lttng_userspace_probe_location_get_lookup_method(userspace_probe_location); | |
636 | if (!lookup_method) { | |
637 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
638 | goto end; | |
639 | } | |
640 | ||
641 | lookup_type = lttng_userspace_probe_location_lookup_method_get_type(lookup_method); | |
642 | ||
643 | /* Get the binary path, probe name and provider name. */ | |
644 | binary_path = | |
645 | lttng_userspace_probe_location_tracepoint_get_binary_path( | |
646 | userspace_probe_location); | |
647 | if (!binary_path) { | |
648 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
649 | goto end; | |
650 | } | |
651 | ||
652 | probe_name = | |
653 | lttng_userspace_probe_location_tracepoint_get_probe_name( | |
654 | userspace_probe_location); | |
655 | if (!probe_name) { | |
656 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
657 | goto end; | |
658 | } | |
659 | ||
660 | provider_name = | |
661 | lttng_userspace_probe_location_tracepoint_get_provider_name( | |
662 | userspace_probe_location); | |
663 | if (!provider_name) { | |
664 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
665 | goto end; | |
666 | } | |
667 | ||
668 | /* Open a userspace probe tracepoint attribute. */ | |
669 | ret = config_writer_open_element(writer, config_element_userspace_probe_tracepoint_attributes); | |
670 | if (ret) { | |
671 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
672 | goto end; | |
673 | } | |
674 | ||
675 | switch (lookup_type) { | |
676 | case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT: | |
677 | ret = config_writer_write_element_string(writer, | |
678 | config_element_userspace_probe_lookup, | |
679 | config_element_userspace_probe_lookup_tracepoint_sdt); | |
83712c39 FD |
680 | if (ret) { |
681 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
682 | goto end; | |
683 | } | |
c1e83fb4 FD |
684 | break; |
685 | default: | |
686 | ERR("Unsupported kernel userspace probe tracepoint lookup method."); | |
687 | ret = LTTNG_ERR_INVALID; | |
688 | goto end; | |
83712c39 FD |
689 | } |
690 | ||
c1e83fb4 FD |
691 | /* Write the binary path, provider name and the probe name. */ |
692 | ret = config_writer_write_element_string(writer, | |
693 | config_element_userspace_probe_location_binary_path, | |
694 | binary_path); | |
695 | if (ret) { | |
696 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
697 | goto end; | |
698 | } | |
699 | ||
700 | ret = config_writer_write_element_string(writer, | |
701 | config_element_userspace_probe_tracepoint_location_provider_name, | |
702 | provider_name); | |
703 | if (ret) { | |
704 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
705 | goto end; | |
706 | } | |
707 | ||
708 | ret = config_writer_write_element_string(writer, | |
709 | config_element_userspace_probe_tracepoint_location_probe_name, | |
710 | probe_name); | |
711 | if (ret) { | |
712 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
713 | goto end; | |
714 | } | |
715 | ||
716 | /* Close the userspace probe tracepoint attribute. */ | |
717 | ret = config_writer_close_element(writer); | |
718 | if (ret) { | |
719 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
720 | goto end; | |
721 | } | |
722 | ||
723 | end: | |
724 | return ret; | |
725 | } | |
726 | ||
727 | /* | |
728 | * Save the userspace probe function event associated with the event to the | |
729 | * config writer. | |
730 | */ | |
731 | static | |
732 | int save_kernel_userspace_probe_function_event(struct config_writer *writer, | |
733 | struct ltt_kernel_event *event) | |
734 | { | |
735 | int ret = 0; | |
736 | const char *function_name, *binary_path; | |
87597c2c JG |
737 | const struct lttng_userspace_probe_location *userspace_probe_location; |
738 | const struct lttng_userspace_probe_location_lookup_method *lookup_method; | |
c1e83fb4 FD |
739 | enum lttng_userspace_probe_location_lookup_method_type lookup_type; |
740 | ||
741 | /* Get userspace probe location from the event. */ | |
742 | userspace_probe_location = event->userspace_probe_location; | |
743 | if (!userspace_probe_location) { | |
744 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
745 | goto end; | |
746 | } | |
747 | ||
748 | /* Get lookup method and lookup method type. */ | |
749 | lookup_method = lttng_userspace_probe_location_get_lookup_method( | |
750 | userspace_probe_location); | |
751 | if (!lookup_method) { | |
752 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
753 | goto end; | |
754 | } | |
755 | ||
756 | /* Get the binary path and the function name. */ | |
757 | binary_path = | |
758 | lttng_userspace_probe_location_function_get_binary_path( | |
759 | userspace_probe_location); | |
760 | if (!binary_path) { | |
761 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
762 | goto end; | |
763 | } | |
764 | ||
765 | function_name = | |
766 | lttng_userspace_probe_location_function_get_function_name( | |
767 | userspace_probe_location); | |
768 | if (!function_name) { | |
769 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
770 | goto end; | |
771 | } | |
772 | ||
773 | /* Open a userspace probe function attribute. */ | |
774 | ret = config_writer_open_element(writer, | |
775 | config_element_userspace_probe_function_attributes); | |
776 | if (ret) { | |
777 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
778 | goto end; | |
779 | } | |
780 | ||
781 | lookup_type = lttng_userspace_probe_location_lookup_method_get_type(lookup_method); | |
782 | switch (lookup_type) { | |
783 | case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF: | |
784 | ret = config_writer_write_element_string(writer, | |
785 | config_element_userspace_probe_lookup, | |
786 | config_element_userspace_probe_lookup_function_elf); | |
83712c39 FD |
787 | if (ret) { |
788 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
789 | goto end; | |
790 | } | |
c1e83fb4 FD |
791 | break; |
792 | case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_DEFAULT: | |
793 | ret = config_writer_write_element_string(writer, | |
794 | config_element_userspace_probe_lookup, | |
795 | config_element_userspace_probe_lookup_function_default); | |
796 | if (ret) { | |
797 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
798 | goto end; | |
799 | } | |
800 | break; | |
801 | default: | |
802 | ERR("Unsupported kernel userspace probe function lookup method."); | |
803 | ret = LTTNG_ERR_INVALID; | |
804 | goto end; | |
83712c39 FD |
805 | } |
806 | ||
c1e83fb4 FD |
807 | /* Write the binary path and the function name. */ |
808 | ret = config_writer_write_element_string(writer, | |
809 | config_element_userspace_probe_location_binary_path, | |
810 | binary_path); | |
811 | if (ret) { | |
812 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
813 | goto end; | |
814 | } | |
815 | ||
816 | ret = config_writer_write_element_string(writer, | |
817 | config_element_userspace_probe_function_location_function_name, | |
818 | function_name); | |
819 | if (ret) { | |
820 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
821 | goto end; | |
822 | } | |
823 | ||
824 | /* Close the userspace probe function attribute. */ | |
83712c39 FD |
825 | ret = config_writer_close_element(writer); |
826 | if (ret) { | |
827 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
828 | goto end; | |
829 | } | |
c1e83fb4 | 830 | |
83712c39 FD |
831 | end: |
832 | return ret; | |
833 | } | |
c1e83fb4 FD |
834 | |
835 | static | |
836 | int save_kernel_userspace_probe_event(struct config_writer *writer, | |
837 | struct ltt_kernel_event *event) | |
838 | { | |
839 | int ret; | |
840 | struct lttng_userspace_probe_location *userspace_probe_location; | |
841 | ||
842 | /* Get userspace probe location from the event. */ | |
843 | userspace_probe_location = event->userspace_probe_location; | |
844 | if (!userspace_probe_location) { | |
845 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
846 | goto end; | |
847 | } | |
848 | ||
849 | switch(lttng_userspace_probe_location_get_type(userspace_probe_location)) { | |
850 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION: | |
851 | { | |
852 | ret = save_kernel_userspace_probe_function_event(writer, event); | |
853 | if (ret) { | |
854 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
855 | goto end; | |
856 | } | |
857 | break; | |
858 | } | |
859 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT: | |
860 | { | |
861 | ret = save_kernel_userspace_probe_tracepoint_event(writer, event); | |
862 | if (ret) { | |
863 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
864 | goto end; | |
865 | } | |
866 | break; | |
867 | } | |
868 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_UNKNOWN: | |
869 | default: | |
870 | ERR("Unsupported kernel userspace probe location type."); | |
871 | ret = LTTNG_ERR_INVALID; | |
872 | goto end; | |
873 | } | |
874 | ||
875 | end: | |
876 | return ret; | |
877 | } | |
878 | ||
879 | static | |
fb198a11 | 880 | int save_kernel_event(struct config_writer *writer, |
83712c39 | 881 | struct ltt_kernel_event *event) |
fb198a11 JG |
882 | { |
883 | int ret; | |
884 | const char *instrumentation_type; | |
885 | ||
886 | ret = config_writer_open_element(writer, config_element_event); | |
887 | if (ret) { | |
888 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
889 | goto end; | |
890 | } | |
891 | ||
892 | if (event->event->name[0]) { | |
893 | ret = config_writer_write_element_string(writer, | |
894 | config_element_name, event->event->name); | |
895 | if (ret) { | |
896 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
897 | goto end; | |
898 | } | |
899 | } | |
900 | ||
901 | ret = config_writer_write_element_bool(writer, config_element_enabled, | |
902 | event->enabled); | |
903 | if (ret) { | |
904 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
905 | goto end; | |
906 | } | |
907 | ||
908 | instrumentation_type = get_kernel_instrumentation_string( | |
909 | event->event->instrumentation); | |
910 | if (!instrumentation_type) { | |
911 | ret = LTTNG_ERR_INVALID; | |
912 | goto end; | |
913 | } | |
914 | ||
915 | ret = config_writer_write_element_string(writer, config_element_type, | |
916 | instrumentation_type); | |
917 | if (ret) { | |
918 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
919 | goto end; | |
920 | } | |
921 | ||
911d1560 JG |
922 | if (event->filter_expression) { |
923 | ret = config_writer_write_element_string(writer, | |
924 | config_element_filter, | |
925 | event->filter_expression); | |
926 | if (ret) { | |
927 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
928 | goto end; | |
929 | } | |
930 | } | |
931 | ||
fb198a11 JG |
932 | if (event->event->instrumentation == LTTNG_KERNEL_FUNCTION || |
933 | event->event->instrumentation == LTTNG_KERNEL_KPROBE || | |
c1e83fb4 | 934 | event->event->instrumentation == LTTNG_KERNEL_UPROBE || |
fb198a11 JG |
935 | event->event->instrumentation == LTTNG_KERNEL_KRETPROBE) { |
936 | ||
937 | ret = config_writer_open_element(writer, | |
938 | config_element_attributes); | |
939 | if (ret) { | |
940 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
941 | goto end; | |
942 | } | |
943 | ||
944 | switch (event->event->instrumentation) { | |
0de3eda1 | 945 | case LTTNG_KERNEL_SYSCALL: |
fb198a11 | 946 | case LTTNG_KERNEL_FUNCTION: |
83712c39 | 947 | ret = save_kernel_function_event(writer, event); |
fb198a11 | 948 | if (ret) { |
fb198a11 JG |
949 | goto end; |
950 | } | |
951 | break; | |
952 | case LTTNG_KERNEL_KPROBE: | |
953 | case LTTNG_KERNEL_KRETPROBE: | |
83712c39 | 954 | ret = save_kernel_kprobe_event(writer, event); |
fb198a11 | 955 | if (ret) { |
fb198a11 JG |
956 | goto end; |
957 | } | |
958 | break; | |
c1e83fb4 FD |
959 | case LTTNG_KERNEL_UPROBE: |
960 | ret = save_kernel_userspace_probe_event(writer, event); | |
961 | if (ret) { | |
962 | goto end; | |
963 | } | |
964 | break; | |
fb198a11 JG |
965 | default: |
966 | ERR("Unsupported kernel instrumentation type."); | |
967 | ret = LTTNG_ERR_INVALID; | |
968 | goto end; | |
969 | } | |
970 | ||
971 | /* /attributes */ | |
972 | ret = config_writer_close_element(writer); | |
973 | if (ret) { | |
974 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
975 | goto end; | |
976 | } | |
977 | } | |
978 | ||
979 | /* /event */ | |
980 | ret = config_writer_close_element(writer); | |
981 | if (ret) { | |
982 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
983 | goto end; | |
984 | } | |
55c9e7ca JR |
985 | |
986 | ret = LTTNG_OK; | |
fb198a11 JG |
987 | end: |
988 | return ret; | |
989 | } | |
990 | ||
55c9e7ca | 991 | /* Return LTTNG_OK on success else a LTTNG_ERR* code. */ |
fb198a11 JG |
992 | static |
993 | int save_kernel_events(struct config_writer *writer, | |
0de3eda1 | 994 | struct ltt_kernel_channel *kchan) |
fb198a11 JG |
995 | { |
996 | int ret; | |
997 | struct ltt_kernel_event *event; | |
998 | ||
999 | ret = config_writer_open_element(writer, config_element_events); | |
1000 | if (ret) { | |
1001 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1002 | goto end; | |
1003 | } | |
1004 | ||
0de3eda1 | 1005 | cds_list_for_each_entry(event, &kchan->events_list.head, list) { |
fb198a11 | 1006 | ret = save_kernel_event(writer, event); |
55c9e7ca | 1007 | if (ret != LTTNG_OK) { |
fb198a11 JG |
1008 | goto end; |
1009 | } | |
1010 | } | |
1011 | ||
1012 | /* /events */ | |
1013 | ret = config_writer_close_element(writer); | |
1014 | if (ret) { | |
1015 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1016 | goto end; | |
1017 | } | |
55c9e7ca JR |
1018 | |
1019 | ret = LTTNG_OK; | |
fb198a11 JG |
1020 | end: |
1021 | return ret; | |
1022 | } | |
1023 | ||
55c9e7ca | 1024 | /* Return LTTNG_OK on success else a LTTNG_ERR* code. */ |
fb198a11 JG |
1025 | static |
1026 | int save_ust_event(struct config_writer *writer, | |
1027 | struct ltt_ust_event *event) | |
1028 | { | |
1029 | int ret; | |
1030 | const char *loglevel_type_string; | |
1031 | ||
1032 | ret = config_writer_open_element(writer, config_element_event); | |
1033 | if (ret) { | |
1034 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1035 | goto end; | |
1036 | } | |
1037 | ||
1038 | if (event->attr.name[0]) { | |
1039 | ret = config_writer_write_element_string(writer, | |
1040 | config_element_name, event->attr.name); | |
1041 | if (ret) { | |
1042 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1043 | goto end; | |
1044 | } | |
1045 | } | |
1046 | ||
1047 | ret = config_writer_write_element_bool(writer, config_element_enabled, | |
1048 | event->enabled); | |
1049 | if (ret) { | |
1050 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1051 | goto end; | |
1052 | } | |
1053 | ||
1054 | if (event->attr.instrumentation != LTTNG_UST_TRACEPOINT) { | |
1055 | ERR("Unsupported UST instrumentation type."); | |
1056 | ret = LTTNG_ERR_INVALID; | |
1057 | goto end; | |
1058 | } | |
1059 | ret = config_writer_write_element_string(writer, config_element_type, | |
1060 | config_event_type_tracepoint); | |
1061 | if (ret) { | |
1062 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1063 | goto end; | |
1064 | } | |
1065 | ||
1066 | loglevel_type_string = get_loglevel_type_string( | |
1067 | event->attr.loglevel_type); | |
1068 | if (!loglevel_type_string) { | |
1069 | ERR("Unsupported UST loglevel type."); | |
1070 | ret = LTTNG_ERR_INVALID; | |
1071 | goto end; | |
1072 | } | |
1073 | ||
1074 | ret = config_writer_write_element_string(writer, | |
1075 | config_element_loglevel_type, loglevel_type_string); | |
1076 | if (ret) { | |
1077 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1078 | goto end; | |
1079 | } | |
1080 | ||
1adbdb10 JG |
1081 | /* The log level is irrelevant if no "filtering" is enabled */ |
1082 | if (event->attr.loglevel_type != LTTNG_UST_LOGLEVEL_ALL) { | |
1083 | ret = config_writer_write_element_signed_int(writer, | |
1084 | config_element_loglevel, event->attr.loglevel); | |
1085 | if (ret) { | |
1086 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1087 | goto end; | |
1088 | } | |
fb198a11 JG |
1089 | } |
1090 | ||
1091 | if (event->filter_expression) { | |
1092 | ret = config_writer_write_element_string(writer, | |
1093 | config_element_filter, event->filter_expression); | |
1094 | if (ret) { | |
1095 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1096 | goto end; | |
1097 | } | |
1098 | } | |
1099 | ||
1100 | if (event->exclusion && event->exclusion->count) { | |
1101 | uint32_t i; | |
1102 | ||
1103 | ret = config_writer_open_element(writer, | |
1104 | config_element_exclusions); | |
1105 | if (ret) { | |
1106 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1107 | goto end; | |
1108 | } | |
1109 | ||
1110 | for (i = 0; i < event->exclusion->count; i++) { | |
1111 | ret = config_writer_write_element_string(writer, | |
1112 | config_element_exclusion, | |
d7af3565 PP |
1113 | LTTNG_EVENT_EXCLUSION_NAME_AT( |
1114 | event->exclusion, i)); | |
fb198a11 JG |
1115 | if (ret) { |
1116 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1117 | goto end; | |
1118 | } | |
1119 | } | |
1120 | ||
1121 | /* /exclusions */ | |
1122 | ret = config_writer_close_element(writer); | |
1123 | if (ret) { | |
1124 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1125 | goto end; | |
1126 | } | |
1127 | } | |
1128 | ||
1129 | /* /event */ | |
1130 | ret = config_writer_close_element(writer); | |
1131 | if (ret) { | |
1132 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1133 | goto end; | |
1134 | } | |
55c9e7ca JR |
1135 | |
1136 | ret = LTTNG_OK; | |
fb198a11 JG |
1137 | end: |
1138 | return ret; | |
1139 | } | |
1140 | ||
55c9e7ca | 1141 | /* Return LTTNG_OK on success else a LTTNG_ERR* code. */ |
fb198a11 JG |
1142 | static |
1143 | int save_ust_events(struct config_writer *writer, | |
1144 | struct lttng_ht *events) | |
1145 | { | |
1146 | int ret; | |
1147 | struct ltt_ust_event *event; | |
1148 | struct lttng_ht_node_str *node; | |
1149 | struct lttng_ht_iter iter; | |
1150 | ||
1151 | ret = config_writer_open_element(writer, config_element_events); | |
1152 | if (ret) { | |
1153 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1154 | goto end; | |
1155 | } | |
1156 | ||
1157 | rcu_read_lock(); | |
1158 | cds_lfht_for_each_entry(events->ht, &iter.iter, node, node) { | |
1159 | event = caa_container_of(node, struct ltt_ust_event, node); | |
1160 | ||
af325ba1 JG |
1161 | if (event->internal) { |
1162 | /* Internal events must not be exposed to clients */ | |
1163 | continue; | |
1164 | } | |
fb198a11 | 1165 | ret = save_ust_event(writer, event); |
55c9e7ca | 1166 | if (ret != LTTNG_OK) { |
fb198a11 JG |
1167 | rcu_read_unlock(); |
1168 | goto end; | |
1169 | } | |
1170 | } | |
1171 | rcu_read_unlock(); | |
1172 | ||
1173 | /* /events */ | |
1174 | ret = config_writer_close_element(writer); | |
1175 | if (ret) { | |
1176 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1177 | goto end; | |
1178 | } | |
55c9e7ca JR |
1179 | |
1180 | ret = LTTNG_OK; | |
fb198a11 JG |
1181 | end: |
1182 | return ret; | |
1183 | } | |
1184 | ||
55c9e7ca | 1185 | /* Return LTTNG_OK on success else a LTTNG_ERR* code. */ |
51755dc8 | 1186 | static |
0b35b846 | 1187 | int init_ust_event_from_agent_event(struct ltt_ust_event *ust_event, |
51755dc8 JG |
1188 | struct agent_event *agent_event) |
1189 | { | |
55c9e7ca | 1190 | int ret; |
0b35b846 JG |
1191 | enum lttng_ust_loglevel_type ust_loglevel_type; |
1192 | ||
51755dc8 JG |
1193 | ust_event->enabled = agent_event->enabled; |
1194 | ust_event->attr.instrumentation = LTTNG_UST_TRACEPOINT; | |
d333bdaa MD |
1195 | if (lttng_strncpy(ust_event->attr.name, agent_event->name, |
1196 | LTTNG_SYMBOL_NAME_LEN)) { | |
55c9e7ca | 1197 | ret = LTTNG_ERR_INVALID; |
d333bdaa MD |
1198 | goto end; |
1199 | } | |
0b35b846 JG |
1200 | switch (agent_event->loglevel_type) { |
1201 | case LTTNG_EVENT_LOGLEVEL_ALL: | |
1202 | ust_loglevel_type = LTTNG_UST_LOGLEVEL_ALL; | |
1203 | break; | |
1204 | case LTTNG_EVENT_LOGLEVEL_SINGLE: | |
1205 | ust_loglevel_type = LTTNG_UST_LOGLEVEL_SINGLE; | |
1206 | break; | |
1207 | case LTTNG_EVENT_LOGLEVEL_RANGE: | |
1208 | ust_loglevel_type = LTTNG_UST_LOGLEVEL_RANGE; | |
1209 | break; | |
1210 | default: | |
1211 | ERR("Invalid agent_event loglevel_type."); | |
55c9e7ca | 1212 | ret = LTTNG_ERR_INVALID; |
0b35b846 JG |
1213 | goto end; |
1214 | } | |
1215 | ||
1216 | ust_event->attr.loglevel_type = ust_loglevel_type; | |
2106efa0 | 1217 | ust_event->attr.loglevel = agent_event->loglevel_value; |
51755dc8 JG |
1218 | ust_event->filter_expression = agent_event->filter_expression; |
1219 | ust_event->exclusion = agent_event->exclusion; | |
55c9e7ca JR |
1220 | |
1221 | ret = LTTNG_OK; | |
0b35b846 JG |
1222 | end: |
1223 | return ret; | |
51755dc8 JG |
1224 | } |
1225 | ||
55c9e7ca | 1226 | /* Return LTTNG_OK on success else a LTTNG_ERR* code. */ |
51755dc8 JG |
1227 | static |
1228 | int save_agent_events(struct config_writer *writer, | |
51755dc8 JG |
1229 | struct agent *agent) |
1230 | { | |
1231 | int ret; | |
1232 | struct lttng_ht_iter iter; | |
1233 | struct lttng_ht_node_str *node; | |
1234 | ||
1235 | ret = config_writer_open_element(writer, config_element_events); | |
1236 | if (ret) { | |
1237 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1238 | goto end; | |
1239 | } | |
1240 | ||
1241 | rcu_read_lock(); | |
1242 | cds_lfht_for_each_entry(agent->events->ht, &iter.iter, node, node) { | |
1243 | int ret; | |
1244 | struct agent_event *agent_event; | |
1245 | struct ltt_ust_event fake_event; | |
1246 | ||
1247 | memset(&fake_event, 0, sizeof(fake_event)); | |
1248 | agent_event = caa_container_of(node, struct agent_event, node); | |
1249 | ||
1250 | /* | |
1251 | * Initialize a fake ust event to reuse the same serialization | |
1252 | * function since UST and agent events contain the same info | |
1253 | * (and one could wonder why they don't reuse the same | |
1254 | * structures...). | |
1255 | */ | |
0b35b846 | 1256 | ret = init_ust_event_from_agent_event(&fake_event, agent_event); |
55c9e7ca | 1257 | if (ret != LTTNG_OK) { |
0b35b846 JG |
1258 | rcu_read_unlock(); |
1259 | goto end; | |
1260 | } | |
51755dc8 | 1261 | ret = save_ust_event(writer, &fake_event); |
55c9e7ca | 1262 | if (ret != LTTNG_OK) { |
51755dc8 JG |
1263 | rcu_read_unlock(); |
1264 | goto end; | |
1265 | } | |
1266 | } | |
1267 | rcu_read_unlock(); | |
1268 | ||
1269 | /* /events */ | |
1270 | ret = config_writer_close_element(writer); | |
1271 | if (ret) { | |
1272 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1273 | goto end; | |
1274 | } | |
55c9e7ca JR |
1275 | |
1276 | ret = LTTNG_OK; | |
51755dc8 JG |
1277 | end: |
1278 | return ret; | |
1279 | } | |
1280 | ||
55c9e7ca | 1281 | /* Return LTTNG_OK on success else a LTTNG_ERR* code. */ |
fb198a11 JG |
1282 | static |
1283 | int save_kernel_context(struct config_writer *writer, | |
1284 | struct lttng_kernel_context *ctx) | |
1285 | { | |
55c9e7ca | 1286 | int ret = LTTNG_OK; |
fb198a11 JG |
1287 | |
1288 | if (!ctx) { | |
1289 | goto end; | |
1290 | } | |
1291 | ||
fb198a11 JG |
1292 | ret = config_writer_open_element(writer, config_element_context); |
1293 | if (ret) { | |
1294 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1295 | goto end; | |
1296 | } | |
1297 | ||
cba45eda | 1298 | if (ctx->ctx == LTTNG_KERNEL_CONTEXT_PERF_CPU_COUNTER) { |
045fc617 JG |
1299 | ret = config_writer_open_element(writer, |
1300 | config_element_context_perf); | |
fb198a11 JG |
1301 | if (ret) { |
1302 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1303 | goto end; | |
1304 | } | |
1305 | ||
1306 | ret = config_writer_write_element_unsigned_int(writer, | |
1307 | config_element_type, ctx->u.perf_counter.type); | |
1308 | if (ret) { | |
1309 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1310 | goto end; | |
1311 | } | |
1312 | ||
1313 | ret = config_writer_write_element_unsigned_int(writer, | |
1314 | config_element_config, ctx->u.perf_counter.config); | |
1315 | if (ret) { | |
1316 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1317 | goto end; | |
1318 | } | |
1319 | ||
1320 | ret = config_writer_write_element_string(writer, | |
1321 | config_element_name, ctx->u.perf_counter.name); | |
1322 | if (ret) { | |
1323 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1324 | goto end; | |
1325 | } | |
1326 | ||
1327 | /* /perf */ | |
1328 | ret = config_writer_close_element(writer); | |
1329 | if (ret) { | |
1330 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1331 | goto end; | |
1332 | } | |
1333 | } else { | |
1334 | const char *context_type_string = | |
1335 | get_kernel_context_type_string(ctx->ctx); | |
1336 | ||
1337 | if (!context_type_string) { | |
1338 | ERR("Unsupported kernel context type."); | |
1339 | ret = LTTNG_ERR_INVALID; | |
1340 | goto end; | |
1341 | } | |
1342 | ||
1343 | ret = config_writer_write_element_string(writer, | |
1344 | config_element_type, context_type_string); | |
1345 | if (ret) { | |
1346 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1347 | goto end; | |
1348 | } | |
1349 | } | |
1350 | ||
1351 | /* /context */ | |
1352 | ret = config_writer_close_element(writer); | |
1353 | if (ret) { | |
1354 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1355 | goto end; | |
1356 | } | |
1357 | ||
55c9e7ca | 1358 | ret = LTTNG_OK; |
645328ae DG |
1359 | end: |
1360 | return ret; | |
1361 | } | |
1362 | ||
55c9e7ca | 1363 | /* Return LTTNG_OK on success else a LTTNG_ERR* code. */ |
645328ae DG |
1364 | static |
1365 | int save_kernel_contexts(struct config_writer *writer, | |
1366 | struct ltt_kernel_channel *kchan) | |
1367 | { | |
1368 | int ret; | |
1369 | struct ltt_kernel_context *ctx; | |
1370 | ||
2aa64052 | 1371 | if (cds_list_empty(&kchan->ctx_list)) { |
55c9e7ca | 1372 | ret = LTTNG_OK; |
2aa64052 JG |
1373 | goto end; |
1374 | } | |
1375 | ||
645328ae DG |
1376 | ret = config_writer_open_element(writer, config_element_contexts); |
1377 | if (ret) { | |
1378 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1379 | goto end; | |
1380 | } | |
1381 | ||
1382 | cds_list_for_each_entry(ctx, &kchan->ctx_list, list) { | |
1383 | ret = save_kernel_context(writer, &ctx->ctx); | |
55c9e7ca | 1384 | if (ret != LTTNG_OK) { |
645328ae DG |
1385 | goto end; |
1386 | } | |
1387 | } | |
1388 | ||
fb198a11 JG |
1389 | /* /contexts */ |
1390 | ret = config_writer_close_element(writer); | |
1391 | if (ret) { | |
1392 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1393 | goto end; | |
1394 | } | |
55c9e7ca JR |
1395 | |
1396 | ret = LTTNG_OK; | |
fb198a11 JG |
1397 | end: |
1398 | return ret; | |
1399 | } | |
1400 | ||
55c9e7ca | 1401 | /* Return LTTNG_OK on success else a LTTNG_ERR* code. */ |
045fc617 JG |
1402 | static |
1403 | int save_ust_context_perf_thread_counter(struct config_writer *writer, | |
1404 | struct ltt_ust_context *ctx) | |
1405 | { | |
1406 | int ret; | |
1407 | ||
1408 | assert(writer); | |
1409 | assert(ctx); | |
1410 | ||
1411 | /* Perf contexts are saved as event_perf_context_type */ | |
1412 | ret = config_writer_open_element(writer, config_element_context_perf); | |
1413 | if (ret) { | |
1414 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1415 | goto end; | |
1416 | } | |
1417 | ||
1418 | ret = config_writer_write_element_unsigned_int(writer, | |
1419 | config_element_type, ctx->ctx.u.perf_counter.type); | |
1420 | if (ret) { | |
1421 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1422 | goto end; | |
1423 | } | |
1424 | ||
1425 | ret = config_writer_write_element_unsigned_int(writer, | |
1426 | config_element_config, ctx->ctx.u.perf_counter.config); | |
1427 | if (ret) { | |
1428 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1429 | goto end; | |
1430 | } | |
1431 | ||
1432 | ret = config_writer_write_element_string(writer, config_element_name, | |
1433 | ctx->ctx.u.perf_counter.name); | |
1434 | if (ret) { | |
1435 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1436 | goto end; | |
1437 | } | |
1438 | ||
1439 | /* /perf */ | |
1440 | ret = config_writer_close_element(writer); | |
1441 | if (ret) { | |
1442 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1443 | goto end; | |
1444 | } | |
55c9e7ca JR |
1445 | |
1446 | ret = LTTNG_OK; | |
045fc617 JG |
1447 | end: |
1448 | return ret; | |
1449 | } | |
1450 | ||
55c9e7ca | 1451 | /* Return LTTNG_OK on success else a LTTNG_ERR* code. */ |
045fc617 JG |
1452 | static |
1453 | int save_ust_context_app_ctx(struct config_writer *writer, | |
1454 | struct ltt_ust_context *ctx) | |
1455 | { | |
1456 | int ret; | |
1457 | ||
1458 | assert(writer); | |
1459 | assert(ctx); | |
1460 | ||
1461 | /* Application contexts are saved as application_context_type */ | |
1462 | ret = config_writer_open_element(writer, config_element_context_app); | |
1463 | if (ret) { | |
1464 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1465 | goto end; | |
1466 | } | |
1467 | ||
1468 | ret = config_writer_write_element_string(writer, | |
1469 | config_element_context_app_provider_name, | |
1470 | ctx->ctx.u.app_ctx.provider_name); | |
1471 | if (ret) { | |
1472 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1473 | goto end; | |
1474 | } | |
1475 | ||
1476 | ret = config_writer_write_element_string(writer, | |
1477 | config_element_context_app_ctx_name, | |
1478 | ctx->ctx.u.app_ctx.ctx_name); | |
1479 | if (ret) { | |
1480 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1481 | goto end; | |
1482 | } | |
1483 | ||
1484 | /* /app */ | |
1485 | ret = config_writer_close_element(writer); | |
1486 | if (ret) { | |
1487 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1488 | goto end; | |
1489 | } | |
55c9e7ca JR |
1490 | |
1491 | ret = LTTNG_OK; | |
045fc617 JG |
1492 | end: |
1493 | return ret; | |
1494 | } | |
1495 | ||
55c9e7ca | 1496 | /* Return LTTNG_OK on success else a LTTNG_ERR* code. */ |
045fc617 JG |
1497 | static |
1498 | int save_ust_context_generic(struct config_writer *writer, | |
1499 | struct ltt_ust_context *ctx) | |
1500 | { | |
1501 | int ret; | |
1502 | const char *context_type_string; | |
1503 | ||
1504 | assert(writer); | |
1505 | assert(ctx); | |
1506 | ||
1507 | /* Save context as event_context_type_type */ | |
1508 | context_type_string = get_ust_context_type_string( | |
1509 | ctx->ctx.ctx); | |
1510 | if (!context_type_string) { | |
1511 | ERR("Unsupported UST context type."); | |
1512 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1513 | goto end; | |
1514 | } | |
1515 | ||
1516 | ret = config_writer_write_element_string(writer, | |
1517 | config_element_type, context_type_string); | |
1518 | if (ret) { | |
1519 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1520 | goto end; | |
1521 | } | |
55c9e7ca JR |
1522 | |
1523 | ret = LTTNG_OK; | |
045fc617 JG |
1524 | end: |
1525 | return ret; | |
1526 | } | |
1527 | ||
55c9e7ca | 1528 | /* Return LTTNG_OK on success else a LTTNG_ERR* code. */ |
fb198a11 JG |
1529 | static |
1530 | int save_ust_context(struct config_writer *writer, | |
1531 | struct cds_list_head *ctx_list) | |
1532 | { | |
1533 | int ret; | |
1534 | struct ltt_ust_context *ctx; | |
1535 | ||
1536 | assert(writer); | |
1537 | assert(ctx_list); | |
1538 | ||
1539 | ret = config_writer_open_element(writer, config_element_contexts); | |
1540 | if (ret) { | |
1541 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1542 | goto end; | |
1543 | } | |
1544 | ||
1545 | cds_list_for_each_entry(ctx, ctx_list, list) { | |
fb198a11 JG |
1546 | ret = config_writer_open_element(writer, |
1547 | config_element_context); | |
1548 | if (ret) { | |
1549 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1550 | goto end; | |
1551 | } | |
1552 | ||
045fc617 JG |
1553 | switch (ctx->ctx.ctx) { |
1554 | case LTTNG_UST_CONTEXT_PERF_THREAD_COUNTER: | |
1555 | ret = save_ust_context_perf_thread_counter(writer, ctx); | |
1556 | break; | |
1557 | case LTTNG_UST_CONTEXT_APP_CONTEXT: | |
1558 | ret = save_ust_context_app_ctx(writer, ctx); | |
1559 | break; | |
1560 | default: | |
1561 | /* Save generic context. */ | |
1562 | ret = save_ust_context_generic(writer, ctx); | |
1563 | } | |
55c9e7ca | 1564 | if (ret != LTTNG_OK) { |
045fc617 | 1565 | goto end; |
fb198a11 JG |
1566 | } |
1567 | ||
1568 | /* /context */ | |
1569 | ret = config_writer_close_element(writer); | |
1570 | if (ret) { | |
1571 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1572 | goto end; | |
1573 | } | |
1574 | } | |
1575 | ||
1576 | /* /contexts */ | |
1577 | ret = config_writer_close_element(writer); | |
1578 | if (ret) { | |
1579 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1580 | goto end; | |
1581 | } | |
55c9e7ca JR |
1582 | |
1583 | ret = LTTNG_OK; | |
fb198a11 JG |
1584 | end: |
1585 | return ret; | |
1586 | } | |
1587 | ||
55c9e7ca | 1588 | /* Return LTTNG_OK on success else a LTTNG_ERR* code. */ |
fb198a11 JG |
1589 | static |
1590 | int save_kernel_channel(struct config_writer *writer, | |
1591 | struct ltt_kernel_channel *kchan) | |
1592 | { | |
1593 | int ret; | |
1594 | ||
1595 | assert(writer); | |
1596 | assert(kchan); | |
1597 | ||
1598 | ret = config_writer_open_element(writer, config_element_channel); | |
1599 | if (ret) { | |
1600 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1601 | goto end; | |
1602 | } | |
1603 | ||
1604 | ret = config_writer_write_element_string(writer, config_element_name, | |
1605 | kchan->channel->name); | |
1606 | if (ret) { | |
1607 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1608 | goto end; | |
1609 | } | |
1610 | ||
1611 | ret = config_writer_write_element_bool(writer, config_element_enabled, | |
1612 | kchan->channel->enabled); | |
1613 | if (ret) { | |
1614 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1615 | goto end; | |
1616 | } | |
1617 | ||
1618 | ret = save_kernel_channel_attributes(writer, &kchan->channel->attr); | |
55c9e7ca | 1619 | if (ret != LTTNG_OK) { |
fb198a11 JG |
1620 | goto end; |
1621 | } | |
1622 | ||
0de3eda1 | 1623 | ret = save_kernel_events(writer, kchan); |
55c9e7ca | 1624 | if (ret != LTTNG_OK) { |
fb198a11 JG |
1625 | goto end; |
1626 | } | |
1627 | ||
645328ae | 1628 | ret = save_kernel_contexts(writer, kchan); |
55c9e7ca | 1629 | if (ret != LTTNG_OK) { |
fb198a11 JG |
1630 | goto end; |
1631 | } | |
1632 | ||
1633 | /* /channel */ | |
1634 | ret = config_writer_close_element(writer); | |
1635 | if (ret) { | |
1636 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1637 | goto end; | |
1638 | } | |
55c9e7ca JR |
1639 | |
1640 | ret = LTTNG_OK; | |
fb198a11 JG |
1641 | end: |
1642 | return ret; | |
1643 | } | |
1644 | ||
55c9e7ca | 1645 | /* Return LTTNG_OK on success else a LTTNG_ERR* code. */ |
fb198a11 JG |
1646 | static |
1647 | int save_ust_channel(struct config_writer *writer, | |
1648 | struct ltt_ust_channel *ust_chan, | |
1649 | struct ltt_ust_session *session) | |
1650 | { | |
1651 | int ret; | |
1652 | ||
1653 | assert(writer); | |
1654 | assert(ust_chan); | |
1655 | assert(session); | |
1656 | ||
1657 | ret = config_writer_open_element(writer, config_element_channel); | |
1658 | if (ret) { | |
1659 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1660 | goto end; | |
1661 | } | |
1662 | ||
1663 | ret = config_writer_write_element_string(writer, config_element_name, | |
1664 | ust_chan->name); | |
1665 | if (ret) { | |
1666 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1667 | goto end; | |
1668 | } | |
1669 | ||
1670 | ret = config_writer_write_element_bool(writer, config_element_enabled, | |
1671 | ust_chan->enabled); | |
1672 | if (ret) { | |
1673 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1674 | goto end; | |
1675 | } | |
1676 | ||
1677 | ret = save_ust_channel_attributes(writer, &ust_chan->attr); | |
55c9e7ca | 1678 | if (ret != LTTNG_OK) { |
fb198a11 JG |
1679 | goto end; |
1680 | } | |
1681 | ||
1682 | ret = config_writer_write_element_unsigned_int(writer, | |
1683 | config_element_tracefile_size, ust_chan->tracefile_size); | |
1684 | if (ret) { | |
1685 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1686 | goto end; | |
1687 | } | |
1688 | ||
1689 | ret = config_writer_write_element_unsigned_int(writer, | |
1690 | config_element_tracefile_count, ust_chan->tracefile_count); | |
1691 | if (ret) { | |
1692 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1693 | goto end; | |
1694 | } | |
1695 | ||
1696 | ret = config_writer_write_element_unsigned_int(writer, | |
1697 | config_element_live_timer_interval, | |
1698 | session->live_timer_interval); | |
1699 | if (ret) { | |
1700 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1701 | goto end; | |
1702 | } | |
1703 | ||
51755dc8 JG |
1704 | if (ust_chan->domain == LTTNG_DOMAIN_UST) { |
1705 | ret = save_ust_events(writer, ust_chan->events); | |
55c9e7ca | 1706 | if (ret != LTTNG_OK) { |
51755dc8 JG |
1707 | goto end; |
1708 | } | |
1709 | } else { | |
1710 | struct agent *agent = NULL; | |
1711 | ||
1712 | agent = trace_ust_find_agent(session, ust_chan->domain); | |
1713 | if (!agent) { | |
1714 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1715 | ERR("Could not find agent associated to UST subdomain"); | |
1716 | goto end; | |
1717 | } | |
1718 | ||
1719 | /* | |
1720 | * Channels associated with a UST sub-domain (such as JUL, Log4j | |
1721 | * or Python) don't have any non-internal events. We retrieve | |
1722 | * the "agent" events associated with this channel and serialize | |
1723 | * them. | |
1724 | */ | |
8cd0a98d | 1725 | ret = save_agent_events(writer, agent); |
55c9e7ca | 1726 | if (ret != LTTNG_OK) { |
51755dc8 JG |
1727 | goto end; |
1728 | } | |
fb198a11 JG |
1729 | } |
1730 | ||
1731 | ret = save_ust_context(writer, &ust_chan->ctx_list); | |
55c9e7ca | 1732 | if (ret != LTTNG_OK) { |
fb198a11 JG |
1733 | goto end; |
1734 | } | |
1735 | ||
1736 | /* /channel */ | |
1737 | ret = config_writer_close_element(writer); | |
1738 | if (ret) { | |
1739 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1740 | goto end; | |
1741 | } | |
55c9e7ca JR |
1742 | |
1743 | ret = LTTNG_OK; | |
fb198a11 JG |
1744 | end: |
1745 | return ret; | |
1746 | } | |
1747 | ||
55c9e7ca | 1748 | /* Return LTTNG_OK on success else a LTTNG_ERR* code. */ |
fb198a11 JG |
1749 | static |
1750 | int save_kernel_session(struct config_writer *writer, | |
1751 | struct ltt_session *session) | |
1752 | { | |
1753 | int ret; | |
1754 | struct ltt_kernel_channel *kchan; | |
1755 | ||
1756 | assert(writer); | |
1757 | assert(session); | |
1758 | ||
1759 | ret = config_writer_write_element_string(writer, config_element_type, | |
1760 | config_domain_type_kernel); | |
1761 | if (ret) { | |
1762 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1763 | goto end; | |
1764 | } | |
1765 | ||
1766 | ret = config_writer_write_element_string(writer, | |
1767 | config_element_buffer_type, config_buffer_type_global); | |
1768 | if (ret) { | |
1769 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1770 | goto end; | |
1771 | } | |
1772 | ||
1773 | ret = config_writer_open_element(writer, | |
1774 | config_element_channels); | |
1775 | if (ret) { | |
1776 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1777 | goto end; | |
1778 | } | |
1779 | ||
1780 | cds_list_for_each_entry(kchan, &session->kernel_session->channel_list.head, | |
1781 | list) { | |
1782 | ret = save_kernel_channel(writer, kchan); | |
55c9e7ca | 1783 | if (ret != LTTNG_OK) { |
fb198a11 JG |
1784 | goto end; |
1785 | } | |
1786 | } | |
1787 | ||
1788 | /* /channels */ | |
1789 | ret = config_writer_close_element(writer); | |
1790 | if (ret) { | |
1791 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1792 | goto end; | |
1793 | } | |
55c9e7ca JR |
1794 | |
1795 | ret = LTTNG_OK; | |
fb198a11 JG |
1796 | end: |
1797 | return ret; | |
1798 | } | |
1799 | ||
1800 | static | |
51755dc8 JG |
1801 | const char *get_config_domain_str(enum lttng_domain_type domain) |
1802 | { | |
1803 | const char *str_dom; | |
1804 | ||
1805 | switch (domain) { | |
1806 | case LTTNG_DOMAIN_KERNEL: | |
1807 | str_dom = config_domain_type_kernel; | |
1808 | break; | |
1809 | case LTTNG_DOMAIN_UST: | |
1810 | str_dom = config_domain_type_ust; | |
1811 | break; | |
1812 | case LTTNG_DOMAIN_JUL: | |
1813 | str_dom = config_domain_type_jul; | |
1814 | break; | |
1815 | case LTTNG_DOMAIN_LOG4J: | |
1816 | str_dom = config_domain_type_log4j; | |
1817 | break; | |
1818 | case LTTNG_DOMAIN_PYTHON: | |
1819 | str_dom = config_domain_type_python; | |
1820 | break; | |
1821 | default: | |
1822 | assert(0); | |
1823 | } | |
1824 | ||
1825 | return str_dom; | |
1826 | } | |
1827 | ||
55c9e7ca | 1828 | /* Return LTTNG_OK on success else a LTTNG_ERR* code. */ |
159b042f | 1829 | static int save_process_attr_tracker(struct config_writer *writer, |
55c9e7ca JR |
1830 | struct ltt_session *sess, |
1831 | int domain, | |
159b042f | 1832 | enum lttng_process_attr process_attr) |
e8fcabef | 1833 | { |
55c9e7ca | 1834 | int ret = LTTNG_OK; |
55c9e7ca | 1835 | const char *element_id_tracker, *element_target_id, *element_id; |
159b042f JG |
1836 | const struct process_attr_tracker *tracker; |
1837 | enum lttng_tracking_policy tracking_policy; | |
1838 | struct lttng_process_attr_values *values = NULL; | |
1839 | ||
1840 | switch (process_attr) { | |
1841 | case LTTNG_PROCESS_ATTR_PROCESS_ID: | |
1842 | element_id_tracker = config_element_process_attr_tracker_pid; | |
1843 | element_target_id = config_element_process_attr_pid_value; | |
1844 | element_id = config_element_process_attr_id; | |
1845 | break; | |
1846 | case LTTNG_PROCESS_ATTR_VIRTUAL_PROCESS_ID: | |
1847 | element_id_tracker = config_element_process_attr_tracker_vpid; | |
1848 | element_target_id = config_element_process_attr_vpid_value; | |
1849 | element_id = config_element_process_attr_id; | |
1850 | break; | |
1851 | case LTTNG_PROCESS_ATTR_USER_ID: | |
1852 | element_id_tracker = config_element_process_attr_tracker_uid; | |
1853 | element_target_id = config_element_process_attr_uid_value; | |
1854 | element_id = config_element_process_attr_id; | |
1855 | break; | |
1856 | case LTTNG_PROCESS_ATTR_VIRTUAL_USER_ID: | |
1857 | element_id_tracker = config_element_process_attr_tracker_vuid; | |
1858 | element_target_id = config_element_process_attr_vuid_value; | |
1859 | element_id = config_element_process_attr_id; | |
1860 | break; | |
1861 | case LTTNG_PROCESS_ATTR_GROUP_ID: | |
1862 | element_id_tracker = config_element_process_attr_tracker_gid; | |
1863 | element_target_id = config_element_process_attr_gid_value; | |
1864 | element_id = config_element_process_attr_id; | |
1865 | break; | |
1866 | case LTTNG_PROCESS_ATTR_VIRTUAL_GROUP_ID: | |
1867 | element_id_tracker = config_element_process_attr_tracker_vgid; | |
1868 | element_target_id = config_element_process_attr_vgid_value; | |
1869 | element_id = config_element_process_attr_id; | |
55c9e7ca JR |
1870 | break; |
1871 | default: | |
1872 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1873 | goto end; | |
1874 | } | |
e8fcabef JG |
1875 | |
1876 | switch (domain) { | |
1877 | case LTTNG_DOMAIN_KERNEL: | |
1878 | { | |
159b042f JG |
1879 | tracker = kernel_get_process_attr_tracker( |
1880 | sess->kernel_session, process_attr); | |
1881 | assert(tracker); | |
e8fcabef JG |
1882 | break; |
1883 | } | |
1884 | case LTTNG_DOMAIN_UST: | |
1885 | { | |
159b042f JG |
1886 | tracker = trace_ust_get_process_attr_tracker( |
1887 | sess->ust_session, process_attr); | |
1888 | assert(tracker); | |
e8fcabef JG |
1889 | break; |
1890 | } | |
1891 | case LTTNG_DOMAIN_JUL: | |
1892 | case LTTNG_DOMAIN_LOG4J: | |
1893 | case LTTNG_DOMAIN_PYTHON: | |
1894 | default: | |
159b042f | 1895 | ret = LTTNG_ERR_UNSUPPORTED_DOMAIN; |
e8fcabef JG |
1896 | goto end; |
1897 | } | |
1898 | ||
159b042f JG |
1899 | tracking_policy = process_attr_tracker_get_tracking_policy(tracker); |
1900 | if (tracking_policy == LTTNG_TRACKING_POLICY_INCLUDE_ALL) { | |
1901 | /* Tracking all, nothing to output. */ | |
1902 | ret = LTTNG_OK; | |
e283e4a0 JR |
1903 | goto end; |
1904 | } | |
a7a533cd | 1905 | |
55c9e7ca JR |
1906 | ret = config_writer_open_element(writer, element_id_tracker); |
1907 | if (ret) { | |
1908 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1909 | goto end; | |
1910 | } | |
1911 | ||
159b042f JG |
1912 | ret = config_writer_open_element( |
1913 | writer, config_element_process_attr_values); | |
55c9e7ca JR |
1914 | if (ret) { |
1915 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1916 | goto end; | |
1917 | } | |
1918 | ||
88ac6301 | 1919 | if (tracking_policy == LTTNG_TRACKING_POLICY_INCLUDE_SET) { |
159b042f JG |
1920 | unsigned int i, count; |
1921 | enum process_attr_tracker_status status = | |
1922 | process_attr_tracker_get_inclusion_set( | |
1923 | tracker, &values); | |
1924 | ||
1925 | if (status != PROCESS_ATTR_TRACKER_STATUS_OK) { | |
1926 | ret = LTTNG_ERR_NOMEM; | |
1927 | goto end; | |
1928 | } | |
1929 | ||
1930 | count = _lttng_process_attr_values_get_count(values); | |
1931 | ||
1932 | for (i = 0; i < count; i++) { | |
1933 | unsigned int integral_value = UINT_MAX; | |
1934 | const char *name = NULL; | |
1935 | const struct process_attr_value *value = | |
1936 | lttng_process_attr_tracker_values_get_at_index( | |
1937 | values, i); | |
1938 | ||
1939 | assert(value); | |
1940 | ret = config_writer_open_element( | |
1941 | writer, element_target_id); | |
1942 | if (ret) { | |
a7a533cd JR |
1943 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
1944 | goto end; | |
1945 | } | |
159b042f JG |
1946 | |
1947 | switch (value->type) { | |
1948 | case LTTNG_PROCESS_ATTR_VALUE_TYPE_PID: | |
1949 | integral_value = | |
1950 | (unsigned int) value->value.pid; | |
55c9e7ca | 1951 | break; |
159b042f JG |
1952 | case LTTNG_PROCESS_ATTR_VALUE_TYPE_UID: |
1953 | integral_value = | |
1954 | (unsigned int) value->value.uid; | |
1955 | break; | |
1956 | case LTTNG_PROCESS_ATTR_VALUE_TYPE_GID: | |
1957 | integral_value = | |
1958 | (unsigned int) value->value.gid; | |
1959 | break; | |
1960 | case LTTNG_PROCESS_ATTR_VALUE_TYPE_USER_NAME: | |
1961 | name = value->value.user_name; | |
1962 | assert(name); | |
1963 | break; | |
1964 | case LTTNG_PROCESS_ATTR_VALUE_TYPE_GROUP_NAME: | |
1965 | name = value->value.group_name; | |
1966 | assert(name); | |
55c9e7ca JR |
1967 | break; |
1968 | default: | |
159b042f | 1969 | abort(); |
e8fcabef | 1970 | } |
159b042f JG |
1971 | |
1972 | if (name) { | |
1973 | ret = config_writer_write_element_string(writer, | |
1974 | config_element_name, name); | |
1975 | } else { | |
1976 | ret = config_writer_write_element_unsigned_int( | |
1977 | writer, element_id, | |
1978 | integral_value); | |
e8fcabef | 1979 | } |
159b042f JG |
1980 | |
1981 | if (ret) { | |
2d97a006 JR |
1982 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
1983 | goto end; | |
1984 | } | |
e8fcabef | 1985 | |
55c9e7ca | 1986 | /* /$element_target_id */ |
e8fcabef JG |
1987 | ret = config_writer_close_element(writer); |
1988 | if (ret) { | |
1989 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1990 | goto end; | |
1991 | } | |
1992 | } | |
55c9e7ca | 1993 | } |
e8fcabef | 1994 | |
88ac6301 | 1995 | /* /values */ |
55c9e7ca JR |
1996 | ret = config_writer_close_element(writer); |
1997 | if (ret) { | |
1998 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
1999 | goto end; | |
2000 | } | |
e8fcabef | 2001 | |
55c9e7ca JR |
2002 | /* /$element_id_tracker */ |
2003 | ret = config_writer_close_element(writer); | |
2004 | if (ret) { | |
2005 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2006 | goto end; | |
e8fcabef | 2007 | } |
55c9e7ca JR |
2008 | |
2009 | ret = LTTNG_OK; | |
e8fcabef | 2010 | end: |
159b042f | 2011 | lttng_process_attr_values_destroy(values); |
e8fcabef JG |
2012 | return ret; |
2013 | } | |
2014 | ||
55c9e7ca | 2015 | /* Return LTTNG_OK on success else a LTTNG_ERR* code. */ |
159b042f | 2016 | static int save_process_attr_trackers(struct config_writer *writer, |
55c9e7ca JR |
2017 | struct ltt_session *sess, |
2018 | int domain) | |
2019 | { | |
2020 | int ret; | |
2021 | ||
2022 | switch (domain) { | |
2023 | case LTTNG_DOMAIN_KERNEL: | |
159b042f JG |
2024 | ret = save_process_attr_tracker(writer, sess, domain, |
2025 | LTTNG_PROCESS_ATTR_PROCESS_ID); | |
2026 | if (ret != LTTNG_OK) { | |
2027 | goto end; | |
2028 | } | |
2029 | ret = save_process_attr_tracker(writer, sess, domain, | |
2030 | LTTNG_PROCESS_ATTR_VIRTUAL_PROCESS_ID); | |
2031 | if (ret != LTTNG_OK) { | |
2032 | goto end; | |
2033 | } | |
2034 | ret = save_process_attr_tracker(writer, sess, domain, | |
2035 | LTTNG_PROCESS_ATTR_USER_ID); | |
2036 | if (ret != LTTNG_OK) { | |
2037 | goto end; | |
2038 | } | |
2039 | ret = save_process_attr_tracker(writer, sess, domain, | |
2040 | LTTNG_PROCESS_ATTR_VIRTUAL_USER_ID); | |
2041 | if (ret != LTTNG_OK) { | |
2042 | goto end; | |
2043 | } | |
2044 | ret = save_process_attr_tracker(writer, sess, domain, | |
2045 | LTTNG_PROCESS_ATTR_GROUP_ID); | |
2046 | if (ret != LTTNG_OK) { | |
2047 | goto end; | |
2048 | } | |
2049 | ret = save_process_attr_tracker(writer, sess, domain, | |
2050 | LTTNG_PROCESS_ATTR_VIRTUAL_GROUP_ID); | |
2051 | if (ret != LTTNG_OK) { | |
2052 | goto end; | |
2053 | } | |
55c9e7ca JR |
2054 | break; |
2055 | case LTTNG_DOMAIN_UST: | |
159b042f JG |
2056 | ret = save_process_attr_tracker(writer, sess, domain, |
2057 | LTTNG_PROCESS_ATTR_VIRTUAL_PROCESS_ID); | |
2058 | if (ret != LTTNG_OK) { | |
2059 | goto end; | |
2060 | } | |
2061 | ret = save_process_attr_tracker(writer, sess, domain, | |
2062 | LTTNG_PROCESS_ATTR_VIRTUAL_USER_ID); | |
2063 | if (ret != LTTNG_OK) { | |
2064 | goto end; | |
2065 | } | |
2066 | ret = save_process_attr_tracker(writer, sess, domain, | |
2067 | LTTNG_PROCESS_ATTR_VIRTUAL_GROUP_ID); | |
2068 | if (ret != LTTNG_OK) { | |
2069 | goto end; | |
2070 | } | |
55c9e7ca JR |
2071 | break; |
2072 | default: | |
159b042f | 2073 | ret = LTTNG_ERR_INVALID; |
74675e31 | 2074 | goto end; |
55c9e7ca | 2075 | } |
159b042f JG |
2076 | ret = LTTNG_OK; |
2077 | end: | |
2078 | return ret; | |
55c9e7ca JR |
2079 | } |
2080 | ||
2081 | /* Return LTTNG_OK on success else a LTTNG_ERR* code. */ | |
51755dc8 JG |
2082 | static |
2083 | int save_ust_domain(struct config_writer *writer, | |
2084 | struct ltt_session *session, enum lttng_domain_type domain) | |
fb198a11 JG |
2085 | { |
2086 | int ret; | |
2087 | struct ltt_ust_channel *ust_chan; | |
2088 | const char *buffer_type_string; | |
2089 | struct lttng_ht_node_str *node; | |
2090 | struct lttng_ht_iter iter; | |
51755dc8 | 2091 | const char *config_domain_name; |
fb198a11 JG |
2092 | |
2093 | assert(writer); | |
2094 | assert(session); | |
2095 | ||
51755dc8 JG |
2096 | ret = config_writer_open_element(writer, |
2097 | config_element_domain); | |
2098 | if (ret) { | |
2099 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2100 | goto end; | |
2101 | } | |
2102 | ||
2103 | config_domain_name = get_config_domain_str(domain); | |
2104 | if (!config_domain_name) { | |
2105 | ret = LTTNG_ERR_INVALID; | |
2106 | goto end; | |
2107 | } | |
2108 | ||
2109 | ret = config_writer_write_element_string(writer, | |
2110 | config_element_type, config_domain_name); | |
fb198a11 JG |
2111 | if (ret) { |
2112 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2113 | goto end; | |
2114 | } | |
2115 | ||
2116 | buffer_type_string = get_buffer_type_string( | |
2117 | session->ust_session->buffer_type); | |
2118 | if (!buffer_type_string) { | |
2119 | ERR("Unsupported buffer type."); | |
2120 | ret = LTTNG_ERR_INVALID; | |
2121 | goto end; | |
2122 | } | |
2123 | ||
2124 | ret = config_writer_write_element_string(writer, | |
2125 | config_element_buffer_type, buffer_type_string); | |
2126 | if (ret) { | |
2127 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2128 | goto end; | |
2129 | } | |
2130 | ||
2131 | ret = config_writer_open_element(writer, config_element_channels); | |
2132 | if (ret) { | |
2133 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2134 | goto end; | |
2135 | } | |
2136 | ||
2137 | rcu_read_lock(); | |
2138 | cds_lfht_for_each_entry(session->ust_session->domain_global.channels->ht, | |
2139 | &iter.iter, node, node) { | |
fb198a11 | 2140 | ust_chan = caa_container_of(node, struct ltt_ust_channel, node); |
51755dc8 | 2141 | if (domain == ust_chan->domain) { |
fb198a11 | 2142 | ret = save_ust_channel(writer, ust_chan, session->ust_session); |
55c9e7ca | 2143 | if (ret != LTTNG_OK) { |
fb198a11 JG |
2144 | rcu_read_unlock(); |
2145 | goto end; | |
2146 | } | |
2147 | } | |
2148 | } | |
2149 | rcu_read_unlock(); | |
2150 | ||
2151 | /* /channels */ | |
2152 | ret = config_writer_close_element(writer); | |
2153 | if (ret) { | |
2154 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2155 | goto end; | |
2156 | } | |
51755dc8 | 2157 | |
e8fcabef | 2158 | if (domain == LTTNG_DOMAIN_UST) { |
159b042f JG |
2159 | ret = config_writer_open_element( |
2160 | writer, config_element_process_attr_trackers); | |
847a5916 JR |
2161 | if (ret) { |
2162 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2163 | goto end; | |
2164 | } | |
2165 | ||
159b042f JG |
2166 | ret = save_process_attr_trackers( |
2167 | writer, session, LTTNG_DOMAIN_UST); | |
55c9e7ca | 2168 | if (ret != LTTNG_OK) { |
847a5916 JR |
2169 | goto end; |
2170 | } | |
2171 | ||
e8fcabef | 2172 | /* /trackers */ |
847a5916 JR |
2173 | ret = config_writer_close_element(writer); |
2174 | if (ret) { | |
55c9e7ca | 2175 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
847a5916 JR |
2176 | goto end; |
2177 | } | |
e8fcabef | 2178 | } |
847a5916 | 2179 | |
e8fcabef JG |
2180 | /* /domain */ |
2181 | ret = config_writer_close_element(writer); | |
2182 | if (ret) { | |
2183 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2184 | goto end; | |
847a5916 | 2185 | } |
e8fcabef | 2186 | |
55c9e7ca | 2187 | ret = LTTNG_OK; |
847a5916 | 2188 | end: |
847a5916 JR |
2189 | return ret; |
2190 | } | |
2191 | ||
55c9e7ca | 2192 | /* Return LTTNG_OK on success else a LTTNG_ERR* code. */ |
fb198a11 JG |
2193 | static |
2194 | int save_domains(struct config_writer *writer, struct ltt_session *session) | |
2195 | { | |
55c9e7ca | 2196 | int ret = LTTNG_OK; |
fb198a11 JG |
2197 | |
2198 | assert(writer); | |
2199 | assert(session); | |
2200 | ||
2201 | if (!session->kernel_session && !session->ust_session) { | |
2202 | goto end; | |
2203 | } | |
2204 | ||
2205 | ret = config_writer_open_element(writer, config_element_domains); | |
2206 | if (ret) { | |
2207 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2208 | goto end; | |
2209 | } | |
2210 | ||
fb198a11 JG |
2211 | if (session->kernel_session) { |
2212 | ret = config_writer_open_element(writer, | |
2213 | config_element_domain); | |
2214 | if (ret) { | |
2215 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2216 | goto end; | |
2217 | } | |
2218 | ||
2219 | ret = save_kernel_session(writer, session); | |
55c9e7ca | 2220 | if (ret != LTTNG_OK) { |
fb198a11 JG |
2221 | goto end; |
2222 | } | |
2223 | ||
159b042f JG |
2224 | ret = config_writer_open_element( |
2225 | writer, config_element_process_attr_trackers); | |
847a5916 JR |
2226 | if (ret) { |
2227 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2228 | goto end; | |
2229 | } | |
2230 | ||
159b042f JG |
2231 | ret = save_process_attr_trackers( |
2232 | writer, session, LTTNG_DOMAIN_KERNEL); | |
55c9e7ca | 2233 | if (ret != LTTNG_OK) { |
847a5916 JR |
2234 | goto end; |
2235 | } | |
2236 | ||
2237 | /* /trackers */ | |
2238 | ret = config_writer_close_element(writer); | |
2239 | if (ret) { | |
2240 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2241 | goto end; | |
2242 | } | |
fb198a11 JG |
2243 | /* /domain */ |
2244 | ret = config_writer_close_element(writer); | |
2245 | if (ret) { | |
2246 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2247 | goto end; | |
2248 | } | |
2249 | } | |
2250 | ||
2251 | if (session->ust_session) { | |
51755dc8 | 2252 | ret = save_ust_domain(writer, session, LTTNG_DOMAIN_UST); |
55c9e7ca | 2253 | if (ret != LTTNG_OK) { |
fb198a11 JG |
2254 | goto end; |
2255 | } | |
2256 | ||
51755dc8 | 2257 | ret = save_ust_domain(writer, session, LTTNG_DOMAIN_JUL); |
55c9e7ca | 2258 | if (ret != LTTNG_OK) { |
fb198a11 JG |
2259 | goto end; |
2260 | } | |
fb198a11 | 2261 | |
51755dc8 | 2262 | ret = save_ust_domain(writer, session, LTTNG_DOMAIN_LOG4J); |
55c9e7ca | 2263 | if (ret != LTTNG_OK) { |
51755dc8 JG |
2264 | goto end; |
2265 | } | |
65d72c41 | 2266 | |
51755dc8 | 2267 | ret = save_ust_domain(writer, session, LTTNG_DOMAIN_PYTHON); |
55c9e7ca | 2268 | if (ret != LTTNG_OK) { |
51755dc8 | 2269 | goto end; |
fb198a11 JG |
2270 | } |
2271 | } | |
2272 | ||
2273 | /* /domains */ | |
2274 | ret = config_writer_close_element(writer); | |
2275 | if (ret) { | |
2276 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2277 | goto end; | |
2278 | } | |
55c9e7ca JR |
2279 | |
2280 | ret = LTTNG_OK; | |
fb198a11 JG |
2281 | end: |
2282 | return ret; | |
2283 | } | |
2284 | ||
55c9e7ca | 2285 | /* Return LTTNG_OK on success else a LTTNG_ERR* code. */ |
fb198a11 JG |
2286 | static |
2287 | int save_consumer_output(struct config_writer *writer, | |
2288 | struct consumer_output *output) | |
2289 | { | |
2290 | int ret; | |
2291 | ||
2292 | assert(writer); | |
2293 | assert(output); | |
2294 | ||
2295 | ret = config_writer_open_element(writer, config_element_consumer_output); | |
2296 | if (ret) { | |
2297 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2298 | goto end; | |
2299 | } | |
2300 | ||
2301 | ret = config_writer_write_element_bool(writer, config_element_enabled, | |
2302 | output->enabled); | |
2303 | if (ret) { | |
2304 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2305 | goto end; | |
2306 | } | |
2307 | ||
2308 | ret = config_writer_open_element(writer, config_element_destination); | |
2309 | if (ret) { | |
2310 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2311 | goto end; | |
2312 | } | |
2313 | ||
2314 | switch (output->type) { | |
2315 | case CONSUMER_DST_LOCAL: | |
2316 | ret = config_writer_write_element_string(writer, | |
366a9222 | 2317 | config_element_path, output->dst.session_root_path); |
fb198a11 JG |
2318 | if (ret) { |
2319 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2320 | goto end; | |
2321 | } | |
2322 | break; | |
2323 | case CONSUMER_DST_NET: | |
2324 | { | |
2325 | char *uri; | |
2326 | ||
2327 | uri = zmalloc(PATH_MAX); | |
2328 | if (!uri) { | |
2329 | ret = LTTNG_ERR_NOMEM; | |
2330 | goto end; | |
2331 | } | |
2332 | ||
2333 | ret = config_writer_open_element(writer, config_element_net_output); | |
2334 | if (ret) { | |
2335 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2336 | goto end_net_output; | |
2337 | } | |
2338 | ||
2339 | if (output->dst.net.control_isset && | |
2340 | output->dst.net.data_isset) { | |
2341 | ret = uri_to_str_url(&output->dst.net.control, uri, PATH_MAX); | |
2342 | if (ret < 0) { | |
2343 | ret = LTTNG_ERR_INVALID; | |
2344 | goto end_net_output; | |
2345 | } | |
2346 | ||
2347 | ret = config_writer_write_element_string(writer, | |
2348 | config_element_control_uri, uri); | |
2349 | if (ret) { | |
2350 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2351 | goto end_net_output; | |
2352 | } | |
2353 | ||
2354 | ret = uri_to_str_url(&output->dst.net.data, uri, PATH_MAX); | |
2355 | if (ret < 0) { | |
2356 | ret = LTTNG_ERR_INVALID; | |
2357 | goto end_net_output; | |
2358 | } | |
2359 | ||
2360 | ret = config_writer_write_element_string(writer, | |
2361 | config_element_data_uri, uri); | |
2362 | if (ret) { | |
2363 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2364 | goto end_net_output; | |
2365 | } | |
55c9e7ca | 2366 | ret = LTTNG_OK; |
fb198a11 JG |
2367 | end_net_output: |
2368 | free(uri); | |
55c9e7ca | 2369 | if (ret != LTTNG_OK) { |
fb198a11 JG |
2370 | goto end; |
2371 | } | |
2372 | } else { | |
2373 | ret = !output->dst.net.control_isset ? | |
2374 | LTTNG_ERR_URL_CTRL_MISS : | |
2375 | LTTNG_ERR_URL_DATA_MISS; | |
c39270e5 | 2376 | free(uri); |
fb198a11 JG |
2377 | goto end; |
2378 | } | |
2379 | ||
2380 | ret = config_writer_close_element(writer); | |
2381 | if (ret) { | |
2382 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2383 | goto end; | |
2384 | } | |
2385 | break; | |
2386 | } | |
2387 | default: | |
2388 | ERR("Unsupported consumer output type."); | |
2389 | ret = LTTNG_ERR_INVALID; | |
2390 | goto end; | |
2391 | } | |
2392 | ||
2393 | /* /destination */ | |
2394 | ret = config_writer_close_element(writer); | |
2395 | if (ret) { | |
2396 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2397 | goto end; | |
2398 | } | |
2399 | ||
2400 | /* /consumer_output */ | |
2401 | ret = config_writer_close_element(writer); | |
2402 | if (ret) { | |
2403 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2404 | goto end; | |
2405 | } | |
55c9e7ca JR |
2406 | |
2407 | ret = LTTNG_OK; | |
fb198a11 JG |
2408 | end: |
2409 | return ret; | |
2410 | } | |
2411 | ||
55c9e7ca | 2412 | /* Return LTTNG_OK on success else a LTTNG_ERR* code. */ |
fb198a11 JG |
2413 | static |
2414 | int save_snapshot_outputs(struct config_writer *writer, | |
2415 | struct snapshot *snapshot) | |
2416 | { | |
2417 | int ret; | |
2418 | struct lttng_ht_iter iter; | |
2419 | struct snapshot_output *output; | |
2420 | ||
2421 | assert(writer); | |
2422 | assert(snapshot); | |
2423 | ||
2424 | ret = config_writer_open_element(writer, config_element_snapshot_outputs); | |
2425 | if (ret) { | |
2426 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2427 | goto end; | |
2428 | } | |
2429 | ||
2430 | rcu_read_lock(); | |
2431 | cds_lfht_for_each_entry(snapshot->output_ht->ht, &iter.iter, output, | |
2432 | node.node) { | |
2433 | ret = config_writer_open_element(writer, | |
2434 | config_element_output); | |
2435 | if (ret) { | |
2436 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2437 | goto end_unlock; | |
2438 | } | |
2439 | ||
2440 | ret = config_writer_write_element_string(writer, | |
2441 | config_element_name, output->name); | |
2442 | if (ret) { | |
2443 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2444 | goto end_unlock; | |
2445 | } | |
2446 | ||
2447 | ret = config_writer_write_element_unsigned_int(writer, | |
2448 | config_element_max_size, output->max_size); | |
2449 | if (ret) { | |
2450 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2451 | goto end_unlock; | |
2452 | } | |
2453 | ||
2454 | ret = save_consumer_output(writer, output->consumer); | |
55c9e7ca | 2455 | if (ret != LTTNG_OK) { |
fb198a11 JG |
2456 | goto end_unlock; |
2457 | } | |
2458 | ||
2459 | /* /output */ | |
2460 | ret = config_writer_close_element(writer); | |
2461 | if (ret) { | |
2462 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2463 | goto end_unlock; | |
2464 | } | |
2465 | } | |
2466 | rcu_read_unlock(); | |
2467 | ||
2468 | /* /snapshot_outputs */ | |
2469 | ret = config_writer_close_element(writer); | |
2470 | if (ret) { | |
2471 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2472 | goto end; | |
2473 | } | |
2474 | ||
55c9e7ca | 2475 | ret = LTTNG_OK; |
fb198a11 JG |
2476 | end: |
2477 | return ret; | |
2478 | end_unlock: | |
2479 | rcu_read_unlock(); | |
2480 | return ret; | |
2481 | } | |
2482 | ||
55c9e7ca | 2483 | /* Return LTTNG_OK on success else a LTTNG_ERR* code. */ |
fb198a11 JG |
2484 | static |
2485 | int save_session_output(struct config_writer *writer, | |
2486 | struct ltt_session *session) | |
2487 | { | |
2488 | int ret; | |
2489 | ||
2490 | assert(writer); | |
2491 | assert(session); | |
2492 | ||
2493 | if ((session->snapshot_mode && session->snapshot.nb_output == 0) || | |
2494 | (!session->snapshot_mode && !session->consumer)) { | |
2495 | /* Session is in no output mode */ | |
55c9e7ca | 2496 | ret = LTTNG_OK; |
fb198a11 JG |
2497 | goto end; |
2498 | } | |
2499 | ||
2500 | ret = config_writer_open_element(writer, config_element_output); | |
2501 | if (ret) { | |
2502 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2503 | goto end; | |
2504 | } | |
2505 | ||
2506 | if (session->snapshot_mode) { | |
2507 | ret = save_snapshot_outputs(writer, &session->snapshot); | |
55c9e7ca | 2508 | if (ret != LTTNG_OK) { |
fb198a11 JG |
2509 | goto end; |
2510 | } | |
2511 | } else { | |
2512 | if (session->consumer) { | |
2513 | ret = save_consumer_output(writer, session->consumer); | |
55c9e7ca | 2514 | if (ret != LTTNG_OK) { |
fb198a11 JG |
2515 | goto end; |
2516 | } | |
2517 | } | |
2518 | } | |
2519 | ||
2520 | /* /output */ | |
2521 | ret = config_writer_close_element(writer); | |
2522 | if (ret) { | |
2523 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2524 | goto end; | |
2525 | } | |
55c9e7ca | 2526 | ret = LTTNG_OK; |
fb198a11 JG |
2527 | end: |
2528 | return ret; | |
2529 | } | |
2530 | ||
ce6176f2 JG |
2531 | static |
2532 | int save_session_rotation_schedule(struct config_writer *writer, | |
2533 | enum lttng_rotation_schedule_type type, uint64_t value) | |
2534 | { | |
2535 | int ret = 0; | |
2536 | const char *element_name; | |
2537 | const char *value_name; | |
2538 | ||
2539 | switch (type) { | |
2540 | case LTTNG_ROTATION_SCHEDULE_TYPE_PERIODIC: | |
2541 | element_name = config_element_rotation_schedule_periodic; | |
2542 | value_name = config_element_rotation_schedule_periodic_time_us; | |
2543 | break; | |
2544 | case LTTNG_ROTATION_SCHEDULE_TYPE_SIZE_THRESHOLD: | |
2545 | element_name = config_element_rotation_schedule_size_threshold; | |
2546 | value_name = config_element_rotation_schedule_size_threshold_bytes; | |
2547 | break; | |
2548 | default: | |
2549 | ret = -1; | |
2550 | goto end; | |
2551 | } | |
2552 | ||
2553 | ret = config_writer_open_element(writer, element_name); | |
2554 | if (ret) { | |
2555 | goto end; | |
2556 | } | |
2557 | ||
2558 | ret = config_writer_write_element_unsigned_int(writer, | |
2559 | value_name, value); | |
2560 | if (ret) { | |
2561 | goto end; | |
2562 | } | |
2563 | ||
2564 | /* Close schedule descriptor element. */ | |
2565 | ret = config_writer_close_element(writer); | |
2566 | if (ret) { | |
2567 | goto end; | |
2568 | } | |
2569 | end: | |
2570 | return ret; | |
2571 | } | |
2572 | ||
2573 | static | |
2574 | int save_session_rotation_schedules(struct config_writer *writer, | |
2575 | struct ltt_session *session) | |
2576 | { | |
2577 | int ret; | |
2578 | ||
2579 | ret = config_writer_open_element(writer, | |
2580 | config_element_rotation_schedules); | |
f829d17a JG |
2581 | if (ret) { |
2582 | goto end; | |
2583 | } | |
ce6176f2 JG |
2584 | if (session->rotate_timer_period) { |
2585 | ret = save_session_rotation_schedule(writer, | |
2586 | LTTNG_ROTATION_SCHEDULE_TYPE_PERIODIC, | |
2587 | session->rotate_timer_period); | |
2588 | if (ret) { | |
2589 | goto close_schedules; | |
2590 | } | |
2591 | } | |
2592 | if (session->rotate_size) { | |
2593 | ret = save_session_rotation_schedule(writer, | |
2594 | LTTNG_ROTATION_SCHEDULE_TYPE_SIZE_THRESHOLD, | |
2595 | session->rotate_size); | |
2596 | if (ret) { | |
2597 | goto close_schedules; | |
2598 | } | |
2599 | } | |
2600 | ||
2601 | close_schedules: | |
2602 | /* Close rotation schedules element. */ | |
2603 | ret = config_writer_close_element(writer); | |
2604 | if (ret) { | |
2605 | goto end; | |
2606 | } | |
2607 | end: | |
2608 | return ret; | |
2609 | } | |
2610 | ||
fb198a11 JG |
2611 | /* |
2612 | * Save the given session. | |
2613 | * | |
55c9e7ca | 2614 | * Return LTTNG_OK on success else a LTTNG_ERR* code. |
fb198a11 JG |
2615 | */ |
2616 | static | |
2617 | int save_session(struct ltt_session *session, | |
2618 | struct lttng_save_session_attr *attr, lttng_sock_cred *creds) | |
2619 | { | |
b45f9ad2 | 2620 | int ret, fd = -1; |
511653c3 | 2621 | char config_file_path[LTTNG_PATH_MAX]; |
fb198a11 JG |
2622 | size_t len; |
2623 | struct config_writer *writer = NULL; | |
2624 | size_t session_name_len; | |
2625 | const char *provided_path; | |
f376ad9c | 2626 | int file_open_flags = O_CREAT | O_WRONLY | O_TRUNC; |
fb198a11 JG |
2627 | |
2628 | assert(session); | |
2629 | assert(attr); | |
2630 | assert(creds); | |
2631 | ||
2632 | session_name_len = strlen(session->name); | |
95a29ab8 | 2633 | memset(config_file_path, 0, sizeof(config_file_path)); |
fb198a11 JG |
2634 | |
2635 | if (!session_access_ok(session, | |
2636 | LTTNG_SOCK_GET_UID_CRED(creds), | |
e32d7f27 | 2637 | LTTNG_SOCK_GET_GID_CRED(creds)) || session->destroyed) { |
fb198a11 JG |
2638 | ret = LTTNG_ERR_EPERM; |
2639 | goto end; | |
2640 | } | |
2641 | ||
2642 | provided_path = lttng_save_session_attr_get_output_url(attr); | |
2643 | if (provided_path) { | |
95a29ab8 | 2644 | DBG3("Save session in provided path %s", provided_path); |
fb198a11 | 2645 | len = strlen(provided_path); |
d2992717 | 2646 | if (len >= sizeof(config_file_path)) { |
fb198a11 JG |
2647 | ret = LTTNG_ERR_SET_URL; |
2648 | goto end; | |
2649 | } | |
511653c3 | 2650 | strncpy(config_file_path, provided_path, sizeof(config_file_path)); |
fb198a11 | 2651 | } else { |
7e078ad1 | 2652 | ssize_t ret_len; |
fb198a11 JG |
2653 | char *home_dir = utils_get_user_home_dir( |
2654 | LTTNG_SOCK_GET_UID_CRED(creds)); | |
2655 | if (!home_dir) { | |
2656 | ret = LTTNG_ERR_SET_URL; | |
2657 | goto end; | |
2658 | } | |
2659 | ||
d2992717 | 2660 | ret_len = snprintf(config_file_path, sizeof(config_file_path), |
fb198a11 JG |
2661 | DEFAULT_SESSION_HOME_CONFIGPATH, home_dir); |
2662 | free(home_dir); | |
7e078ad1 | 2663 | if (ret_len < 0) { |
fb198a11 JG |
2664 | PERROR("snprintf save session"); |
2665 | ret = LTTNG_ERR_SET_URL; | |
2666 | goto end; | |
2667 | } | |
7e078ad1 | 2668 | len = ret_len; |
fb198a11 JG |
2669 | } |
2670 | ||
2671 | /* | |
d2992717 DG |
2672 | * Check the path fits in the config file path dst including the '/' |
2673 | * followed by trailing .lttng extension and the NULL terminated string. | |
fb198a11 | 2674 | */ |
d2992717 DG |
2675 | if ((len + session_name_len + 2 + |
2676 | sizeof(DEFAULT_SESSION_CONFIG_FILE_EXTENSION)) | |
2677 | > sizeof(config_file_path)) { | |
fb198a11 JG |
2678 | ret = LTTNG_ERR_SET_URL; |
2679 | goto end; | |
2680 | } | |
2681 | ||
2682 | ret = run_as_mkdir_recursive(config_file_path, S_IRWXU | S_IRWXG, | |
2683 | LTTNG_SOCK_GET_UID_CRED(creds), LTTNG_SOCK_GET_GID_CRED(creds)); | |
2684 | if (ret) { | |
2685 | ret = LTTNG_ERR_SET_URL; | |
2686 | goto end; | |
2687 | } | |
2688 | ||
d2992717 DG |
2689 | /* |
2690 | * At this point, we know that everything fits in the buffer. Validation | |
2691 | * was done just above. | |
2692 | */ | |
fb198a11 | 2693 | config_file_path[len++] = '/'; |
511653c3 | 2694 | strncpy(config_file_path + len, session->name, sizeof(config_file_path) - len); |
fb198a11 JG |
2695 | len += session_name_len; |
2696 | strcpy(config_file_path + len, DEFAULT_SESSION_CONFIG_FILE_EXTENSION); | |
95a29ab8 DG |
2697 | len += sizeof(DEFAULT_SESSION_CONFIG_FILE_EXTENSION); |
2698 | config_file_path[len] = '\0'; | |
fb198a11 | 2699 | |
f376ad9c JG |
2700 | if (!attr->overwrite) { |
2701 | file_open_flags |= O_EXCL; | |
fb198a11 JG |
2702 | } |
2703 | ||
f376ad9c | 2704 | fd = run_as_open(config_file_path, file_open_flags, |
fb198a11 JG |
2705 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP, |
2706 | LTTNG_SOCK_GET_UID_CRED(creds), LTTNG_SOCK_GET_GID_CRED(creds)); | |
2707 | if (fd < 0) { | |
2708 | PERROR("Could not create configuration file"); | |
f376ad9c JG |
2709 | switch (errno) { |
2710 | case EEXIST: | |
2711 | ret = LTTNG_ERR_SAVE_FILE_EXIST; | |
2712 | break; | |
2713 | case EACCES: | |
2714 | ret = LTTNG_ERR_EPERM; | |
2715 | break; | |
2716 | default: | |
2717 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2718 | break; | |
2719 | } | |
fb198a11 JG |
2720 | goto end; |
2721 | } | |
2722 | ||
705bb62f | 2723 | writer = config_writer_create(fd, 1); |
fb198a11 JG |
2724 | if (!writer) { |
2725 | ret = LTTNG_ERR_NOMEM; | |
2726 | goto end; | |
2727 | } | |
2728 | ||
2729 | ret = config_writer_open_element(writer, config_element_sessions); | |
2730 | if (ret) { | |
2731 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2732 | goto end; | |
2733 | } | |
2734 | ||
2735 | ret = config_writer_open_element(writer, config_element_session); | |
2736 | if (ret) { | |
2737 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2738 | goto end; | |
2739 | } | |
2740 | ||
2741 | ret = config_writer_write_element_string(writer, config_element_name, | |
2742 | session->name); | |
2743 | if (ret) { | |
2744 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2745 | goto end; | |
2746 | } | |
2747 | ||
55c9e7ca | 2748 | if (session->shm_path[0] != '\0') { |
9e7c9f56 JR |
2749 | ret = config_writer_write_element_string(writer, |
2750 | config_element_shared_memory_path, | |
2751 | session->shm_path); | |
2752 | if (ret) { | |
2753 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2754 | goto end; | |
2755 | } | |
2756 | } | |
2757 | ||
fb198a11 | 2758 | ret = save_domains(writer, session); |
55c9e7ca | 2759 | if (ret != LTTNG_OK) { |
fb198a11 JG |
2760 | goto end; |
2761 | } | |
2762 | ||
2763 | ret = config_writer_write_element_bool(writer, config_element_started, | |
8382cf6f | 2764 | session->active); |
fb198a11 JG |
2765 | if (ret) { |
2766 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2767 | goto end; | |
2768 | } | |
2769 | ||
329f3443 JD |
2770 | if (session->snapshot_mode || session->live_timer || |
2771 | session->rotate_timer_period || session->rotate_size) { | |
fb198a11 JG |
2772 | ret = config_writer_open_element(writer, config_element_attributes); |
2773 | if (ret) { | |
2774 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2775 | goto end; | |
2776 | } | |
2777 | ||
2778 | if (session->snapshot_mode) { | |
2779 | ret = config_writer_write_element_bool(writer, | |
2780 | config_element_snapshot_mode, 1); | |
2781 | if (ret) { | |
2782 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2783 | goto end; | |
2784 | } | |
329f3443 | 2785 | } else if (session->live_timer) { |
d98ad589 | 2786 | ret = config_writer_write_element_unsigned_int(writer, |
fb198a11 JG |
2787 | config_element_live_timer_interval, session->live_timer); |
2788 | if (ret) { | |
2789 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2790 | goto end; | |
2791 | } | |
2792 | } | |
ce6176f2 JG |
2793 | if (session->rotate_timer_period || session->rotate_size) { |
2794 | ret = save_session_rotation_schedules(writer, | |
2795 | session); | |
329f3443 JD |
2796 | if (ret) { |
2797 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2798 | goto end; | |
2799 | } | |
2800 | } | |
fb198a11 JG |
2801 | |
2802 | /* /attributes */ | |
2803 | ret = config_writer_close_element(writer); | |
2804 | if (ret) { | |
2805 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2806 | goto end; | |
2807 | } | |
2808 | } | |
2809 | ||
2810 | ret = save_session_output(writer, session); | |
55c9e7ca | 2811 | if (ret != LTTNG_OK) { |
fb198a11 JG |
2812 | goto end; |
2813 | } | |
2814 | ||
2815 | /* /session */ | |
2816 | ret = config_writer_close_element(writer); | |
2817 | if (ret) { | |
2818 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2819 | goto end; | |
2820 | } | |
2821 | ||
2822 | /* /sessions */ | |
2823 | ret = config_writer_close_element(writer); | |
2824 | if (ret) { | |
2825 | ret = LTTNG_ERR_SAVE_IO_FAIL; | |
2826 | goto end; | |
2827 | } | |
55c9e7ca JR |
2828 | |
2829 | ret = LTTNG_OK; | |
fb198a11 JG |
2830 | end: |
2831 | if (writer && config_writer_destroy(writer)) { | |
2832 | /* Preserve the original error code */ | |
55c9e7ca | 2833 | ret = ret != LTTNG_OK ? ret : LTTNG_ERR_SAVE_IO_FAIL; |
fb198a11 | 2834 | } |
55c9e7ca | 2835 | if (ret != LTTNG_OK) { |
fb198a11 | 2836 | /* Delete file in case of error */ |
b45f9ad2 | 2837 | if ((fd >= 0) && unlink(config_file_path)) { |
fb198a11 JG |
2838 | PERROR("Unlinking XML session configuration."); |
2839 | } | |
2840 | } | |
2841 | ||
b45f9ad2 | 2842 | if (fd >= 0) { |
55c9e7ca JR |
2843 | int closeret; |
2844 | ||
2845 | closeret = close(fd); | |
2846 | if (closeret) { | |
1d12100d JR |
2847 | PERROR("Closing XML session configuration"); |
2848 | } | |
2849 | } | |
2850 | ||
fb198a11 JG |
2851 | return ret; |
2852 | } | |
2853 | ||
2854 | int cmd_save_sessions(struct lttng_save_session_attr *attr, | |
2855 | lttng_sock_cred *creds) | |
2856 | { | |
2857 | int ret; | |
2858 | const char *session_name; | |
2859 | struct ltt_session *session; | |
2860 | ||
2861 | session_lock_list(); | |
2862 | ||
2863 | session_name = lttng_save_session_attr_get_session_name(attr); | |
2864 | if (session_name) { | |
2865 | session = session_find_by_name(session_name); | |
2866 | if (!session) { | |
2867 | ret = LTTNG_ERR_SESS_NOT_FOUND; | |
2868 | goto end; | |
2869 | } | |
2870 | ||
2871 | session_lock(session); | |
2872 | ret = save_session(session, attr, creds); | |
2873 | session_unlock(session); | |
e32d7f27 | 2874 | session_put(session); |
55c9e7ca | 2875 | if (ret != LTTNG_OK) { |
fb198a11 JG |
2876 | goto end; |
2877 | } | |
2878 | } else { | |
2879 | struct ltt_session_list *list = session_get_list(); | |
2880 | ||
2881 | cds_list_for_each_entry(session, &list->head, list) { | |
e32d7f27 JG |
2882 | if (!session_get(session)) { |
2883 | continue; | |
2884 | } | |
fb198a11 JG |
2885 | session_lock(session); |
2886 | ret = save_session(session, attr, creds); | |
2887 | session_unlock(session); | |
e32d7f27 | 2888 | session_put(session); |
fb198a11 | 2889 | /* Don't abort if we don't have the required permissions. */ |
55c9e7ca | 2890 | if (ret != LTTNG_OK && ret != LTTNG_ERR_EPERM) { |
fb198a11 JG |
2891 | goto end; |
2892 | } | |
2893 | } | |
2894 | } | |
2895 | ret = LTTNG_OK; | |
2896 | ||
2897 | end: | |
2898 | session_unlock_list(); | |
2899 | return ret; | |
2900 | } |