2 * Copyright (C) 2014 Jérémie Galarneau <jeremie.galarneau@efficios.com>
4 * SPDX-License-Identifier: GPL-2.0-only
11 #include "lttng-syscall.hpp"
13 #include "session.hpp"
14 #include "trace-ust.hpp"
16 #include <common/config/session-config.hpp>
17 #include <common/defaults.hpp>
18 #include <common/error.hpp>
19 #include <common/runas.hpp>
20 #include <common/utils.hpp>
22 #include <lttng/save-internal.hpp>
27 #include <urcu/uatomic.h>
29 /* Return LTTNG_OK on success else a LTTNG_ERR* code. */
30 static int save_kernel_channel_attributes(struct config_writer
*writer
,
31 struct lttng_channel_attr
*attr
)
35 ret
= config_writer_write_element_string(writer
,
36 config_element_overwrite_mode
,
37 attr
->overwrite
? config_overwrite_mode_overwrite
:
38 config_overwrite_mode_discard
);
40 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
44 ret
= config_writer_write_element_unsigned_int(
45 writer
, config_element_subbuf_size
, attr
->subbuf_size
);
47 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
51 ret
= config_writer_write_element_unsigned_int(
52 writer
, config_element_num_subbuf
, attr
->num_subbuf
);
54 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
58 ret
= config_writer_write_element_unsigned_int(
59 writer
, config_element_switch_timer_interval
, attr
->switch_timer_interval
);
61 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
65 ret
= config_writer_write_element_unsigned_int(
66 writer
, config_element_read_timer_interval
, attr
->read_timer_interval
);
68 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
72 ret
= config_writer_write_element_string(writer
,
73 config_element_output_type
,
74 attr
->output
== LTTNG_EVENT_SPLICE
?
75 config_output_type_splice
:
76 config_output_type_mmap
);
78 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
82 ret
= config_writer_write_element_unsigned_int(
83 writer
, config_element_tracefile_size
, attr
->tracefile_size
);
85 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
89 ret
= config_writer_write_element_unsigned_int(
90 writer
, config_element_tracefile_count
, attr
->tracefile_count
);
92 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
96 ret
= config_writer_write_element_unsigned_int(
97 writer
, config_element_live_timer_interval
, attr
->live_timer_interval
);
99 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
103 if (attr
->extended
.ptr
) {
104 struct lttng_channel_extended
*ext
= nullptr;
106 ext
= (struct lttng_channel_extended
*) attr
->extended
.ptr
;
107 ret
= config_writer_write_element_unsigned_int(
108 writer
, config_element_monitor_timer_interval
, ext
->monitor_timer_interval
);
110 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
114 ret
= config_writer_write_element_signed_int(
115 writer
, config_element_blocking_timeout
, ext
->blocking_timeout
);
117 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
127 /* Return LTTNG_OK on success else a LTTNG_ERR* code. */
128 static int save_ust_channel_attributes(struct config_writer
*writer
,
129 struct lttng_ust_abi_channel_attr
*attr
)
132 struct ltt_ust_channel
*channel
= nullptr;
134 ret
= config_writer_write_element_string(writer
,
135 config_element_overwrite_mode
,
136 attr
->overwrite
? config_overwrite_mode_overwrite
:
137 config_overwrite_mode_discard
);
139 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
143 ret
= config_writer_write_element_unsigned_int(
144 writer
, config_element_subbuf_size
, attr
->subbuf_size
);
146 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
150 ret
= config_writer_write_element_unsigned_int(
151 writer
, config_element_num_subbuf
, attr
->num_subbuf
);
153 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
157 ret
= config_writer_write_element_unsigned_int(
158 writer
, config_element_switch_timer_interval
, attr
->switch_timer_interval
);
160 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
164 ret
= config_writer_write_element_unsigned_int(
165 writer
, config_element_read_timer_interval
, attr
->read_timer_interval
);
167 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
171 ret
= config_writer_write_element_string(writer
,
172 config_element_output_type
,
173 attr
->output
== LTTNG_UST_ABI_MMAP
?
174 config_output_type_mmap
:
175 config_output_type_splice
);
177 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
181 ret
= config_writer_write_element_signed_int(
182 writer
, config_element_blocking_timeout
, attr
->u
.s
.blocking_timeout
);
184 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
189 * Fetch the monitor timer which is located in the parent of
190 * lttng_ust_channel_attr
192 channel
= lttng::utils::container_of(attr
, <t_ust_channel::attr
);
193 ret
= config_writer_write_element_unsigned_int(
194 writer
, config_element_monitor_timer_interval
, channel
->monitor_timer_interval
);
196 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
206 get_kernel_instrumentation_string(enum lttng_kernel_abi_instrumentation instrumentation
)
208 const char *instrumentation_string
;
210 switch (instrumentation
) {
211 case LTTNG_KERNEL_ABI_ALL
:
212 instrumentation_string
= config_event_type_all
;
214 case LTTNG_KERNEL_ABI_TRACEPOINT
:
215 instrumentation_string
= config_event_type_tracepoint
;
217 case LTTNG_KERNEL_ABI_KPROBE
:
218 instrumentation_string
= config_event_type_probe
;
220 case LTTNG_KERNEL_ABI_UPROBE
:
221 instrumentation_string
= config_event_type_userspace_probe
;
223 case LTTNG_KERNEL_ABI_FUNCTION
:
224 instrumentation_string
= config_event_type_function_entry
;
226 case LTTNG_KERNEL_ABI_KRETPROBE
:
227 instrumentation_string
= config_event_type_function
;
229 case LTTNG_KERNEL_ABI_NOOP
:
230 instrumentation_string
= config_event_type_noop
;
232 case LTTNG_KERNEL_ABI_SYSCALL
:
233 instrumentation_string
= config_event_type_syscall
;
236 instrumentation_string
= nullptr;
239 return instrumentation_string
;
242 static const char *get_kernel_context_type_string(enum lttng_kernel_abi_context_type context_type
)
244 const char *context_type_string
;
246 switch (context_type
) {
247 case LTTNG_KERNEL_ABI_CONTEXT_PID
:
248 context_type_string
= config_event_context_pid
;
250 case LTTNG_KERNEL_ABI_CONTEXT_PROCNAME
:
251 context_type_string
= config_event_context_procname
;
253 case LTTNG_KERNEL_ABI_CONTEXT_PRIO
:
254 context_type_string
= config_event_context_prio
;
256 case LTTNG_KERNEL_ABI_CONTEXT_NICE
:
257 context_type_string
= config_event_context_nice
;
259 case LTTNG_KERNEL_ABI_CONTEXT_VPID
:
260 context_type_string
= config_event_context_vpid
;
262 case LTTNG_KERNEL_ABI_CONTEXT_TID
:
263 context_type_string
= config_event_context_tid
;
265 case LTTNG_KERNEL_ABI_CONTEXT_VTID
:
266 context_type_string
= config_event_context_vtid
;
268 case LTTNG_KERNEL_ABI_CONTEXT_PPID
:
269 context_type_string
= config_event_context_ppid
;
271 case LTTNG_KERNEL_ABI_CONTEXT_VPPID
:
272 context_type_string
= config_event_context_vppid
;
274 case LTTNG_KERNEL_ABI_CONTEXT_HOSTNAME
:
275 context_type_string
= config_event_context_hostname
;
277 case LTTNG_KERNEL_ABI_CONTEXT_INTERRUPTIBLE
:
278 context_type_string
= config_event_context_interruptible
;
280 case LTTNG_KERNEL_ABI_CONTEXT_PREEMPTIBLE
:
281 context_type_string
= config_event_context_preemptible
;
283 case LTTNG_KERNEL_ABI_CONTEXT_NEED_RESCHEDULE
:
284 context_type_string
= config_event_context_need_reschedule
;
286 case LTTNG_KERNEL_ABI_CONTEXT_MIGRATABLE
:
287 context_type_string
= config_event_context_migratable
;
289 case LTTNG_KERNEL_ABI_CONTEXT_CALLSTACK_USER
:
290 context_type_string
= config_event_context_callstack_user
;
292 case LTTNG_KERNEL_ABI_CONTEXT_CALLSTACK_KERNEL
:
293 context_type_string
= config_event_context_callstack_kernel
;
295 case LTTNG_KERNEL_ABI_CONTEXT_CGROUP_NS
:
296 context_type_string
= config_event_context_cgroup_ns
;
298 case LTTNG_KERNEL_ABI_CONTEXT_IPC_NS
:
299 context_type_string
= config_event_context_ipc_ns
;
301 case LTTNG_KERNEL_ABI_CONTEXT_MNT_NS
:
302 context_type_string
= config_event_context_mnt_ns
;
304 case LTTNG_KERNEL_ABI_CONTEXT_NET_NS
:
305 context_type_string
= config_event_context_net_ns
;
307 case LTTNG_KERNEL_ABI_CONTEXT_PID_NS
:
308 context_type_string
= config_event_context_pid_ns
;
310 case LTTNG_KERNEL_ABI_CONTEXT_TIME_NS
:
311 context_type_string
= config_event_context_time_ns
;
313 case LTTNG_KERNEL_ABI_CONTEXT_USER_NS
:
314 context_type_string
= config_event_context_user_ns
;
316 case LTTNG_KERNEL_ABI_CONTEXT_UTS_NS
:
317 context_type_string
= config_event_context_uts_ns
;
319 case LTTNG_KERNEL_ABI_CONTEXT_UID
:
320 context_type_string
= config_event_context_uid
;
322 case LTTNG_KERNEL_ABI_CONTEXT_EUID
:
323 context_type_string
= config_event_context_euid
;
325 case LTTNG_KERNEL_ABI_CONTEXT_SUID
:
326 context_type_string
= config_event_context_suid
;
328 case LTTNG_KERNEL_ABI_CONTEXT_GID
:
329 context_type_string
= config_event_context_gid
;
331 case LTTNG_KERNEL_ABI_CONTEXT_EGID
:
332 context_type_string
= config_event_context_egid
;
334 case LTTNG_KERNEL_ABI_CONTEXT_SGID
:
335 context_type_string
= config_event_context_sgid
;
337 case LTTNG_KERNEL_ABI_CONTEXT_VUID
:
338 context_type_string
= config_event_context_vuid
;
340 case LTTNG_KERNEL_ABI_CONTEXT_VEUID
:
341 context_type_string
= config_event_context_veuid
;
343 case LTTNG_KERNEL_ABI_CONTEXT_VSUID
:
344 context_type_string
= config_event_context_vsuid
;
346 case LTTNG_KERNEL_ABI_CONTEXT_VGID
:
347 context_type_string
= config_event_context_vgid
;
349 case LTTNG_KERNEL_ABI_CONTEXT_VEGID
:
350 context_type_string
= config_event_context_vegid
;
352 case LTTNG_KERNEL_ABI_CONTEXT_VSGID
:
353 context_type_string
= config_event_context_vsgid
;
356 context_type_string
= nullptr;
359 return context_type_string
;
362 static const char *get_ust_context_type_string(enum lttng_ust_abi_context_type context_type
)
364 const char *context_type_string
;
366 switch (context_type
) {
367 case LTTNG_UST_ABI_CONTEXT_PROCNAME
:
368 context_type_string
= config_event_context_procname
;
370 case LTTNG_UST_ABI_CONTEXT_VPID
:
371 context_type_string
= config_event_context_vpid
;
373 case LTTNG_UST_ABI_CONTEXT_VTID
:
374 context_type_string
= config_event_context_vtid
;
376 case LTTNG_UST_ABI_CONTEXT_IP
:
377 context_type_string
= config_event_context_ip
;
379 case LTTNG_UST_ABI_CONTEXT_PTHREAD_ID
:
380 context_type_string
= config_event_context_pthread_id
;
382 case LTTNG_UST_ABI_CONTEXT_APP_CONTEXT
:
383 context_type_string
= config_event_context_app
;
385 case LTTNG_UST_ABI_CONTEXT_CGROUP_NS
:
386 context_type_string
= config_event_context_cgroup_ns
;
388 case LTTNG_UST_ABI_CONTEXT_IPC_NS
:
389 context_type_string
= config_event_context_ipc_ns
;
391 case LTTNG_UST_ABI_CONTEXT_MNT_NS
:
392 context_type_string
= config_event_context_mnt_ns
;
394 case LTTNG_UST_ABI_CONTEXT_NET_NS
:
395 context_type_string
= config_event_context_net_ns
;
397 case LTTNG_UST_ABI_CONTEXT_TIME_NS
:
398 context_type_string
= config_event_context_time_ns
;
400 case LTTNG_UST_ABI_CONTEXT_PID_NS
:
401 context_type_string
= config_event_context_pid_ns
;
403 case LTTNG_UST_ABI_CONTEXT_USER_NS
:
404 context_type_string
= config_event_context_user_ns
;
406 case LTTNG_UST_ABI_CONTEXT_UTS_NS
:
407 context_type_string
= config_event_context_uts_ns
;
409 case LTTNG_UST_ABI_CONTEXT_VUID
:
410 context_type_string
= config_event_context_vuid
;
412 case LTTNG_UST_ABI_CONTEXT_VEUID
:
413 context_type_string
= config_event_context_veuid
;
415 case LTTNG_UST_ABI_CONTEXT_VSUID
:
416 context_type_string
= config_event_context_vsuid
;
418 case LTTNG_UST_ABI_CONTEXT_VGID
:
419 context_type_string
= config_event_context_vgid
;
421 case LTTNG_UST_ABI_CONTEXT_VEGID
:
422 context_type_string
= config_event_context_vegid
;
424 case LTTNG_UST_ABI_CONTEXT_VSGID
:
425 context_type_string
= config_event_context_vsgid
;
427 case LTTNG_UST_ABI_CONTEXT_PERF_THREAD_COUNTER
:
429 * Error, should not be stored in the XML, perf contexts
430 * are stored as a node of type event_perf_context_type.
433 context_type_string
= nullptr;
437 return context_type_string
;
440 static const char *get_buffer_type_string(enum lttng_buffer_type buffer_type
)
442 const char *buffer_type_string
;
444 switch (buffer_type
) {
445 case LTTNG_BUFFER_PER_PID
:
446 buffer_type_string
= config_buffer_type_per_pid
;
448 case LTTNG_BUFFER_PER_UID
:
449 buffer_type_string
= config_buffer_type_per_uid
;
451 case LTTNG_BUFFER_GLOBAL
:
452 buffer_type_string
= config_buffer_type_global
;
455 buffer_type_string
= nullptr;
458 return buffer_type_string
;
461 static const char *get_loglevel_type_string(enum lttng_ust_abi_loglevel_type loglevel_type
)
463 const char *loglevel_type_string
;
465 switch (loglevel_type
) {
466 case LTTNG_UST_ABI_LOGLEVEL_ALL
:
467 loglevel_type_string
= config_loglevel_type_all
;
469 case LTTNG_UST_ABI_LOGLEVEL_RANGE
:
470 loglevel_type_string
= config_loglevel_type_range
;
472 case LTTNG_UST_ABI_LOGLEVEL_SINGLE
:
473 loglevel_type_string
= config_loglevel_type_single
;
476 loglevel_type_string
= nullptr;
479 return loglevel_type_string
;
482 /* Return LTTNG_OK on success else a LTTNG_ERR* code. */
483 static int save_kernel_function_event(struct config_writer
*writer
, struct ltt_kernel_event
*event
)
487 ret
= config_writer_open_element(writer
, config_element_function_attributes
);
489 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
493 ret
= config_writer_write_element_string(
494 writer
, config_element_name
, event
->event
->u
.ftrace
.symbol_name
);
496 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
500 /* /function attributes */
501 ret
= config_writer_close_element(writer
);
503 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
510 static int save_kernel_kprobe_event(struct config_writer
*writer
, struct ltt_kernel_event
*event
)
513 const char *symbol_name
;
517 switch (event
->event
->instrumentation
) {
518 case LTTNG_KERNEL_ABI_KPROBE
:
520 * Comments in lttng-kernel.h mention that
521 * either addr or symbol_name are set, not both.
523 addr
= event
->event
->u
.kprobe
.addr
;
524 offset
= event
->event
->u
.kprobe
.offset
;
525 symbol_name
= addr
? nullptr : event
->event
->u
.kprobe
.symbol_name
;
527 case LTTNG_KERNEL_ABI_KRETPROBE
:
528 addr
= event
->event
->u
.kretprobe
.addr
;
529 offset
= event
->event
->u
.kretprobe
.offset
;
530 symbol_name
= addr
? nullptr : event
->event
->u
.kretprobe
.symbol_name
;
533 ERR("Unsupported kernel instrumentation type.");
534 ret
= LTTNG_ERR_INVALID
;
538 ret
= config_writer_open_element(writer
, config_element_probe_attributes
);
540 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
545 ret
= config_writer_write_element_unsigned_int(
546 writer
, config_element_address
, addr
);
548 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
551 } else if (symbol_name
) {
552 ret
= config_writer_write_element_string(
553 writer
, config_element_symbol_name
, symbol_name
);
555 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
558 /* If the offset is non-zero, write it.*/
560 ret
= config_writer_write_element_unsigned_int(
561 writer
, config_element_offset
, offset
);
563 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
569 * This really should not happen as we are either setting the
570 * address or the symbol above.
572 ERR("Invalid probe/function description.");
573 ret
= LTTNG_ERR_INVALID
;
577 ret
= config_writer_close_element(writer
);
579 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
587 * Save the userspace probe tracepoint event associated with the event to the
590 static int save_kernel_userspace_probe_tracepoint_event(struct config_writer
*writer
,
591 struct ltt_kernel_event
*event
)
594 const char *probe_name
, *provider_name
, *binary_path
;
595 const struct lttng_userspace_probe_location
*userspace_probe_location
;
596 const struct lttng_userspace_probe_location_lookup_method
*lookup_method
;
597 enum lttng_userspace_probe_location_lookup_method_type lookup_type
;
599 /* Get userspace probe location from the event. */
600 userspace_probe_location
= event
->userspace_probe_location
;
601 if (!userspace_probe_location
) {
602 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
606 /* Get lookup method and lookup method type. */
607 lookup_method
= lttng_userspace_probe_location_get_lookup_method(userspace_probe_location
);
608 if (!lookup_method
) {
609 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
613 lookup_type
= lttng_userspace_probe_location_lookup_method_get_type(lookup_method
);
615 /* Get the binary path, probe name and provider name. */
617 lttng_userspace_probe_location_tracepoint_get_binary_path(userspace_probe_location
);
619 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
624 lttng_userspace_probe_location_tracepoint_get_probe_name(userspace_probe_location
);
626 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
630 provider_name
= lttng_userspace_probe_location_tracepoint_get_provider_name(
631 userspace_probe_location
);
632 if (!provider_name
) {
633 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
637 /* Open a userspace probe tracepoint attribute. */
638 ret
= config_writer_open_element(writer
,
639 config_element_userspace_probe_tracepoint_attributes
);
641 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
645 switch (lookup_type
) {
646 case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT
:
647 ret
= config_writer_write_element_string(
649 config_element_userspace_probe_lookup
,
650 config_element_userspace_probe_lookup_tracepoint_sdt
);
652 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
657 ERR("Unsupported kernel userspace probe tracepoint lookup method.");
658 ret
= LTTNG_ERR_INVALID
;
662 /* Write the binary path, provider name and the probe name. */
663 ret
= config_writer_write_element_string(
664 writer
, config_element_userspace_probe_location_binary_path
, binary_path
);
666 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
670 ret
= config_writer_write_element_string(
672 config_element_userspace_probe_tracepoint_location_provider_name
,
675 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
679 ret
= config_writer_write_element_string(
680 writer
, config_element_userspace_probe_tracepoint_location_probe_name
, probe_name
);
682 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
686 /* Close the userspace probe tracepoint attribute. */
687 ret
= config_writer_close_element(writer
);
689 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
698 * Save the userspace probe function event associated with the event to the
701 static int save_kernel_userspace_probe_function_event(struct config_writer
*writer
,
702 struct ltt_kernel_event
*event
)
705 const char *function_name
, *binary_path
;
706 const struct lttng_userspace_probe_location
*userspace_probe_location
;
707 const struct lttng_userspace_probe_location_lookup_method
*lookup_method
;
708 enum lttng_userspace_probe_location_lookup_method_type lookup_type
;
710 /* Get userspace probe location from the event. */
711 userspace_probe_location
= event
->userspace_probe_location
;
712 if (!userspace_probe_location
) {
713 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
717 /* Get lookup method and lookup method type. */
718 lookup_method
= lttng_userspace_probe_location_get_lookup_method(userspace_probe_location
);
719 if (!lookup_method
) {
720 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
724 /* Get the binary path and the function name. */
726 lttng_userspace_probe_location_function_get_binary_path(userspace_probe_location
);
728 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
733 lttng_userspace_probe_location_function_get_function_name(userspace_probe_location
);
734 if (!function_name
) {
735 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
739 /* Open a userspace probe function attribute. */
740 ret
= config_writer_open_element(writer
,
741 config_element_userspace_probe_function_attributes
);
743 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
747 lookup_type
= lttng_userspace_probe_location_lookup_method_get_type(lookup_method
);
748 switch (lookup_type
) {
749 case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF
:
750 ret
= config_writer_write_element_string(
752 config_element_userspace_probe_lookup
,
753 config_element_userspace_probe_lookup_function_elf
);
755 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
759 case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_DEFAULT
:
760 ret
= config_writer_write_element_string(
762 config_element_userspace_probe_lookup
,
763 config_element_userspace_probe_lookup_function_default
);
765 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
770 ERR("Unsupported kernel userspace probe function lookup method.");
771 ret
= LTTNG_ERR_INVALID
;
775 /* Write the binary path and the function name. */
776 ret
= config_writer_write_element_string(
777 writer
, config_element_userspace_probe_location_binary_path
, binary_path
);
779 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
783 ret
= config_writer_write_element_string(
785 config_element_userspace_probe_function_location_function_name
,
788 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
792 /* Close the userspace probe function attribute. */
793 ret
= config_writer_close_element(writer
);
795 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
803 static int save_kernel_userspace_probe_event(struct config_writer
*writer
,
804 struct ltt_kernel_event
*event
)
807 struct lttng_userspace_probe_location
*userspace_probe_location
;
809 /* Get userspace probe location from the event. */
810 userspace_probe_location
= event
->userspace_probe_location
;
811 if (!userspace_probe_location
) {
812 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
816 switch (lttng_userspace_probe_location_get_type(userspace_probe_location
)) {
817 case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION
:
819 ret
= save_kernel_userspace_probe_function_event(writer
, event
);
821 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
826 case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT
:
828 ret
= save_kernel_userspace_probe_tracepoint_event(writer
, event
);
830 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
835 case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_UNKNOWN
:
837 ERR("Unsupported kernel userspace probe location type.");
838 ret
= LTTNG_ERR_INVALID
;
846 static int save_kernel_event(struct config_writer
*writer
, struct ltt_kernel_event
*event
)
849 const char *instrumentation_type
;
851 ret
= config_writer_open_element(writer
, config_element_event
);
853 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
857 if (event
->event
->name
[0]) {
858 ret
= config_writer_write_element_string(
859 writer
, config_element_name
, event
->event
->name
);
861 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
866 ret
= config_writer_write_element_bool(writer
, config_element_enabled
, event
->enabled
);
868 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
872 instrumentation_type
= get_kernel_instrumentation_string(event
->event
->instrumentation
);
873 if (!instrumentation_type
) {
874 ret
= LTTNG_ERR_INVALID
;
878 ret
= config_writer_write_element_string(writer
, config_element_type
, instrumentation_type
);
880 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
884 if (event
->filter_expression
) {
885 ret
= config_writer_write_element_string(
886 writer
, config_element_filter
, event
->filter_expression
);
888 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
893 if (event
->event
->instrumentation
== LTTNG_KERNEL_ABI_FUNCTION
||
894 event
->event
->instrumentation
== LTTNG_KERNEL_ABI_KPROBE
||
895 event
->event
->instrumentation
== LTTNG_KERNEL_ABI_UPROBE
||
896 event
->event
->instrumentation
== LTTNG_KERNEL_ABI_KRETPROBE
) {
897 ret
= config_writer_open_element(writer
, config_element_attributes
);
899 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
903 switch (event
->event
->instrumentation
) {
904 case LTTNG_KERNEL_ABI_SYSCALL
:
905 case LTTNG_KERNEL_ABI_FUNCTION
:
906 ret
= save_kernel_function_event(writer
, event
);
911 case LTTNG_KERNEL_ABI_KPROBE
:
912 case LTTNG_KERNEL_ABI_KRETPROBE
:
913 ret
= save_kernel_kprobe_event(writer
, event
);
918 case LTTNG_KERNEL_ABI_UPROBE
:
919 ret
= save_kernel_userspace_probe_event(writer
, event
);
925 ERR("Unsupported kernel instrumentation type.");
926 ret
= LTTNG_ERR_INVALID
;
931 ret
= config_writer_close_element(writer
);
933 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
939 ret
= config_writer_close_element(writer
);
941 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
950 /* Return LTTNG_OK on success else a LTTNG_ERR* code. */
951 static int save_kernel_events(struct config_writer
*writer
, struct ltt_kernel_channel
*kchan
)
954 struct ltt_kernel_event
*event
;
956 ret
= config_writer_open_element(writer
, config_element_events
);
958 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
962 cds_list_for_each_entry (event
, &kchan
->events_list
.head
, list
) {
963 ret
= save_kernel_event(writer
, event
);
964 if (ret
!= LTTNG_OK
) {
970 ret
= config_writer_close_element(writer
);
972 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
981 /* Return LTTNG_OK on success else a LTTNG_ERR* code. */
982 static int save_ust_event(struct config_writer
*writer
, struct ltt_ust_event
*event
)
985 const char *loglevel_type_string
;
987 ret
= config_writer_open_element(writer
, config_element_event
);
989 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
993 if (event
->attr
.name
[0]) {
994 ret
= config_writer_write_element_string(
995 writer
, config_element_name
, event
->attr
.name
);
997 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1002 ret
= config_writer_write_element_bool(writer
, config_element_enabled
, event
->enabled
);
1004 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1008 if (event
->attr
.instrumentation
!= LTTNG_UST_ABI_TRACEPOINT
) {
1009 ERR("Unsupported UST instrumentation type.");
1010 ret
= LTTNG_ERR_INVALID
;
1013 ret
= config_writer_write_element_string(
1014 writer
, config_element_type
, config_event_type_tracepoint
);
1016 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1020 loglevel_type_string
=
1021 get_loglevel_type_string((lttng_ust_abi_loglevel_type
) event
->attr
.loglevel_type
);
1022 if (!loglevel_type_string
) {
1023 ERR("Unsupported UST loglevel type.");
1024 ret
= LTTNG_ERR_INVALID
;
1028 ret
= config_writer_write_element_string(
1029 writer
, config_element_loglevel_type
, loglevel_type_string
);
1031 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1035 /* The log level is irrelevant if no "filtering" is enabled */
1036 if (event
->attr
.loglevel_type
!= LTTNG_UST_ABI_LOGLEVEL_ALL
) {
1037 ret
= config_writer_write_element_signed_int(
1038 writer
, config_element_loglevel
, event
->attr
.loglevel
);
1040 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1045 if (event
->filter_expression
) {
1046 ret
= config_writer_write_element_string(
1047 writer
, config_element_filter
, event
->filter_expression
);
1049 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1054 if (event
->exclusion
&& event
->exclusion
->count
) {
1057 ret
= config_writer_open_element(writer
, config_element_exclusions
);
1059 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1063 for (i
= 0; i
< event
->exclusion
->count
; i
++) {
1064 ret
= config_writer_write_element_string(
1066 config_element_exclusion
,
1067 LTTNG_EVENT_EXCLUSION_NAME_AT(event
->exclusion
, i
));
1069 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1075 ret
= config_writer_close_element(writer
);
1077 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1083 ret
= config_writer_close_element(writer
);
1085 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1094 /* Return LTTNG_OK on success else a LTTNG_ERR* code. */
1095 static int save_ust_events(struct config_writer
*writer
, struct lttng_ht
*events
)
1098 struct ltt_ust_event
*event
;
1099 struct lttng_ht_node_str
*node
;
1100 struct lttng_ht_iter iter
;
1102 ret
= config_writer_open_element(writer
, config_element_events
);
1104 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1109 cds_lfht_for_each_entry (events
->ht
, &iter
.iter
, node
, node
) {
1110 event
= lttng::utils::container_of(node
, <t_ust_event::node
);
1112 if (event
->internal
) {
1113 /* Internal events must not be exposed to clients */
1116 ret
= save_ust_event(writer
, event
);
1117 if (ret
!= LTTNG_OK
) {
1125 ret
= config_writer_close_element(writer
);
1127 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1136 /* Return LTTNG_OK on success else a LTTNG_ERR* code. */
1137 static int init_ust_event_from_agent_event(struct ltt_ust_event
*ust_event
,
1138 struct agent_event
*agent_event
)
1141 enum lttng_ust_abi_loglevel_type ust_loglevel_type
;
1143 ust_event
->enabled
= AGENT_EVENT_IS_ENABLED(agent_event
);
1144 ust_event
->attr
.instrumentation
= LTTNG_UST_ABI_TRACEPOINT
;
1145 if (lttng_strncpy(ust_event
->attr
.name
, agent_event
->name
, LTTNG_SYMBOL_NAME_LEN
)) {
1146 ret
= LTTNG_ERR_INVALID
;
1149 switch (agent_event
->loglevel_type
) {
1150 case LTTNG_EVENT_LOGLEVEL_ALL
:
1151 ust_loglevel_type
= LTTNG_UST_ABI_LOGLEVEL_ALL
;
1153 case LTTNG_EVENT_LOGLEVEL_SINGLE
:
1154 ust_loglevel_type
= LTTNG_UST_ABI_LOGLEVEL_SINGLE
;
1156 case LTTNG_EVENT_LOGLEVEL_RANGE
:
1157 ust_loglevel_type
= LTTNG_UST_ABI_LOGLEVEL_RANGE
;
1160 ERR("Invalid agent_event loglevel_type.");
1161 ret
= LTTNG_ERR_INVALID
;
1165 ust_event
->attr
.loglevel_type
= ust_loglevel_type
;
1166 ust_event
->attr
.loglevel
= agent_event
->loglevel_value
;
1167 ust_event
->filter_expression
= agent_event
->filter_expression
;
1168 ust_event
->exclusion
= agent_event
->exclusion
;
1175 /* Return LTTNG_OK on success else a LTTNG_ERR* code. */
1176 static int save_agent_events(struct config_writer
*writer
, struct agent
*agent
)
1179 struct lttng_ht_iter iter
;
1180 struct lttng_ht_node_str
*node
;
1182 ret
= config_writer_open_element(writer
, config_element_events
);
1184 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1189 cds_lfht_for_each_entry (agent
->events
->ht
, &iter
.iter
, node
, node
) {
1190 struct agent_event
*agent_event
;
1191 struct ltt_ust_event fake_event
;
1193 memset(&fake_event
, 0, sizeof(fake_event
));
1194 agent_event
= lttng::utils::container_of(node
, &agent_event::node
);
1197 * Initialize a fake ust event to reuse the same serialization
1198 * function since UST and agent events contain the same info
1199 * (and one could wonder why they don't reuse the same
1202 ret
= init_ust_event_from_agent_event(&fake_event
, agent_event
);
1203 if (ret
!= LTTNG_OK
) {
1207 ret
= save_ust_event(writer
, &fake_event
);
1208 if (ret
!= LTTNG_OK
) {
1216 ret
= config_writer_close_element(writer
);
1218 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1227 /* Return LTTNG_OK on success else a LTTNG_ERR* code. */
1228 static int save_kernel_context(struct config_writer
*writer
, struct lttng_kernel_abi_context
*ctx
)
1236 ret
= config_writer_open_element(writer
, config_element_context
);
1238 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1242 if (ctx
->ctx
== LTTNG_KERNEL_ABI_CONTEXT_PERF_CPU_COUNTER
) {
1243 ret
= config_writer_open_element(writer
, config_element_context_perf
);
1245 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1249 ret
= config_writer_write_element_unsigned_int(
1250 writer
, config_element_type
, ctx
->u
.perf_counter
.type
);
1252 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1256 ret
= config_writer_write_element_unsigned_int(
1257 writer
, config_element_config
, ctx
->u
.perf_counter
.config
);
1259 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1263 ret
= config_writer_write_element_string(
1264 writer
, config_element_name
, ctx
->u
.perf_counter
.name
);
1266 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1271 ret
= config_writer_close_element(writer
);
1273 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1277 const char *context_type_string
= get_kernel_context_type_string(ctx
->ctx
);
1279 if (!context_type_string
) {
1280 ERR("Unsupported kernel context type.");
1281 ret
= LTTNG_ERR_INVALID
;
1285 ret
= config_writer_write_element_string(
1286 writer
, config_element_type
, context_type_string
);
1288 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1294 ret
= config_writer_close_element(writer
);
1296 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1305 /* Return LTTNG_OK on success else a LTTNG_ERR* code. */
1306 static int save_kernel_contexts(struct config_writer
*writer
, struct ltt_kernel_channel
*kchan
)
1309 struct ltt_kernel_context
*ctx
;
1311 if (cds_list_empty(&kchan
->ctx_list
)) {
1316 ret
= config_writer_open_element(writer
, config_element_contexts
);
1318 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1322 cds_list_for_each_entry (ctx
, &kchan
->ctx_list
, list
) {
1323 ret
= save_kernel_context(writer
, &ctx
->ctx
);
1324 if (ret
!= LTTNG_OK
) {
1330 ret
= config_writer_close_element(writer
);
1332 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1341 /* Return LTTNG_OK on success else a LTTNG_ERR* code. */
1342 static int save_ust_context_perf_thread_counter(struct config_writer
*writer
,
1343 struct ltt_ust_context
*ctx
)
1347 LTTNG_ASSERT(writer
);
1350 /* Perf contexts are saved as event_perf_context_type */
1351 ret
= config_writer_open_element(writer
, config_element_context_perf
);
1353 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1357 ret
= config_writer_write_element_unsigned_int(
1358 writer
, config_element_type
, ctx
->ctx
.u
.perf_counter
.type
);
1360 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1364 ret
= config_writer_write_element_unsigned_int(
1365 writer
, config_element_config
, ctx
->ctx
.u
.perf_counter
.config
);
1367 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1371 ret
= config_writer_write_element_string(
1372 writer
, config_element_name
, ctx
->ctx
.u
.perf_counter
.name
);
1374 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1379 ret
= config_writer_close_element(writer
);
1381 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1390 /* Return LTTNG_OK on success else a LTTNG_ERR* code. */
1391 static int save_ust_context_app_ctx(struct config_writer
*writer
, struct ltt_ust_context
*ctx
)
1395 LTTNG_ASSERT(writer
);
1398 /* Application contexts are saved as application_context_type */
1399 ret
= config_writer_open_element(writer
, config_element_context_app
);
1401 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1405 ret
= config_writer_write_element_string(
1406 writer
, config_element_context_app_provider_name
, ctx
->ctx
.u
.app_ctx
.provider_name
);
1408 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1412 ret
= config_writer_write_element_string(
1413 writer
, config_element_context_app_ctx_name
, ctx
->ctx
.u
.app_ctx
.ctx_name
);
1415 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1420 ret
= config_writer_close_element(writer
);
1422 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1431 /* Return LTTNG_OK on success else a LTTNG_ERR* code. */
1432 static int save_ust_context_generic(struct config_writer
*writer
, struct ltt_ust_context
*ctx
)
1435 const char *context_type_string
;
1437 LTTNG_ASSERT(writer
);
1440 /* Save context as event_context_type_type */
1441 context_type_string
= get_ust_context_type_string(ctx
->ctx
.ctx
);
1442 if (!context_type_string
) {
1443 ERR("Unsupported UST context type.");
1444 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1448 ret
= config_writer_write_element_string(writer
, config_element_type
, context_type_string
);
1450 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1459 /* Return LTTNG_OK on success else a LTTNG_ERR* code. */
1460 static int save_ust_context(struct config_writer
*writer
, struct cds_list_head
*ctx_list
)
1463 struct ltt_ust_context
*ctx
;
1465 LTTNG_ASSERT(writer
);
1466 LTTNG_ASSERT(ctx_list
);
1468 ret
= config_writer_open_element(writer
, config_element_contexts
);
1470 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1474 cds_list_for_each_entry (ctx
, ctx_list
, list
) {
1475 ret
= config_writer_open_element(writer
, config_element_context
);
1477 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1481 switch (ctx
->ctx
.ctx
) {
1482 case LTTNG_UST_ABI_CONTEXT_PERF_THREAD_COUNTER
:
1483 ret
= save_ust_context_perf_thread_counter(writer
, ctx
);
1485 case LTTNG_UST_ABI_CONTEXT_APP_CONTEXT
:
1486 ret
= save_ust_context_app_ctx(writer
, ctx
);
1489 /* Save generic context. */
1490 ret
= save_ust_context_generic(writer
, ctx
);
1492 if (ret
!= LTTNG_OK
) {
1497 ret
= config_writer_close_element(writer
);
1499 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1505 ret
= config_writer_close_element(writer
);
1507 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1516 /* Return LTTNG_OK on success else a LTTNG_ERR* code. */
1517 static int save_kernel_channel(struct config_writer
*writer
, struct ltt_kernel_channel
*kchan
)
1521 LTTNG_ASSERT(writer
);
1522 LTTNG_ASSERT(kchan
);
1524 ret
= config_writer_open_element(writer
, config_element_channel
);
1526 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1530 ret
= config_writer_write_element_string(writer
, config_element_name
, kchan
->channel
->name
);
1532 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1536 ret
= config_writer_write_element_bool(
1537 writer
, config_element_enabled
, kchan
->channel
->enabled
);
1539 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1543 ret
= save_kernel_channel_attributes(writer
, &kchan
->channel
->attr
);
1544 if (ret
!= LTTNG_OK
) {
1548 ret
= save_kernel_events(writer
, kchan
);
1549 if (ret
!= LTTNG_OK
) {
1553 ret
= save_kernel_contexts(writer
, kchan
);
1554 if (ret
!= LTTNG_OK
) {
1559 ret
= config_writer_close_element(writer
);
1561 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1570 /* Return LTTNG_OK on success else a LTTNG_ERR* code. */
1571 static int save_ust_channel(struct config_writer
*writer
,
1572 struct ltt_ust_channel
*ust_chan
,
1573 struct ltt_ust_session
*session
)
1577 LTTNG_ASSERT(writer
);
1578 LTTNG_ASSERT(ust_chan
);
1579 LTTNG_ASSERT(session
);
1581 ret
= config_writer_open_element(writer
, config_element_channel
);
1583 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1587 ret
= config_writer_write_element_string(writer
, config_element_name
, ust_chan
->name
);
1589 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1593 ret
= config_writer_write_element_bool(writer
, config_element_enabled
, ust_chan
->enabled
);
1595 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1599 ret
= save_ust_channel_attributes(writer
, &ust_chan
->attr
);
1600 if (ret
!= LTTNG_OK
) {
1604 ret
= config_writer_write_element_unsigned_int(
1605 writer
, config_element_tracefile_size
, ust_chan
->tracefile_size
);
1607 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1611 ret
= config_writer_write_element_unsigned_int(
1612 writer
, config_element_tracefile_count
, ust_chan
->tracefile_count
);
1614 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1618 ret
= config_writer_write_element_unsigned_int(
1619 writer
, config_element_live_timer_interval
, session
->live_timer_interval
);
1621 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1625 if (ust_chan
->domain
== LTTNG_DOMAIN_UST
) {
1626 ret
= save_ust_events(writer
, ust_chan
->events
);
1627 if (ret
!= LTTNG_OK
) {
1631 struct agent
*agent
= nullptr;
1633 agent
= trace_ust_find_agent(session
, ust_chan
->domain
);
1635 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1636 ERR("Could not find agent associated to UST subdomain");
1641 * Channels associated with a UST sub-domain (such as JUL, Log4j
1642 * or Python) don't have any non-internal events. We retrieve
1643 * the "agent" events associated with this channel and serialize
1646 ret
= save_agent_events(writer
, agent
);
1647 if (ret
!= LTTNG_OK
) {
1652 ret
= save_ust_context(writer
, &ust_chan
->ctx_list
);
1653 if (ret
!= LTTNG_OK
) {
1658 ret
= config_writer_close_element(writer
);
1660 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1669 /* Return LTTNG_OK on success else a LTTNG_ERR* code. */
1670 static int save_kernel_session(struct config_writer
*writer
, struct ltt_session
*session
)
1673 struct ltt_kernel_channel
*kchan
;
1675 LTTNG_ASSERT(writer
);
1676 LTTNG_ASSERT(session
);
1678 ret
= config_writer_write_element_string(
1679 writer
, config_element_type
, config_domain_type_kernel
);
1681 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1685 ret
= config_writer_write_element_string(
1686 writer
, config_element_buffer_type
, config_buffer_type_global
);
1688 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1692 ret
= config_writer_open_element(writer
, config_element_channels
);
1694 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1698 cds_list_for_each_entry (kchan
, &session
->kernel_session
->channel_list
.head
, list
) {
1699 ret
= save_kernel_channel(writer
, kchan
);
1700 if (ret
!= LTTNG_OK
) {
1706 ret
= config_writer_close_element(writer
);
1708 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1717 static const char *get_config_domain_str(enum lttng_domain_type domain
)
1719 const char *str_dom
;
1722 case LTTNG_DOMAIN_KERNEL
:
1723 str_dom
= config_domain_type_kernel
;
1725 case LTTNG_DOMAIN_UST
:
1726 str_dom
= config_domain_type_ust
;
1728 case LTTNG_DOMAIN_JUL
:
1729 str_dom
= config_domain_type_jul
;
1731 case LTTNG_DOMAIN_LOG4J
:
1732 str_dom
= config_domain_type_log4j
;
1734 case LTTNG_DOMAIN_PYTHON
:
1735 str_dom
= config_domain_type_python
;
1744 /* Return LTTNG_OK on success else a LTTNG_ERR* code. */
1745 static int save_process_attr_tracker(struct config_writer
*writer
,
1746 struct ltt_session
*sess
,
1748 enum lttng_process_attr process_attr
)
1751 const char *element_id_tracker
, *element_target_id
, *element_id
;
1752 const struct process_attr_tracker
*tracker
;
1753 enum lttng_tracking_policy tracking_policy
;
1754 struct lttng_process_attr_values
*values
= nullptr;
1756 switch (process_attr
) {
1757 case LTTNG_PROCESS_ATTR_PROCESS_ID
:
1758 element_id_tracker
= config_element_process_attr_tracker_pid
;
1759 element_target_id
= config_element_process_attr_pid_value
;
1760 element_id
= config_element_process_attr_id
;
1762 case LTTNG_PROCESS_ATTR_VIRTUAL_PROCESS_ID
:
1763 element_id_tracker
= config_element_process_attr_tracker_vpid
;
1764 element_target_id
= config_element_process_attr_vpid_value
;
1765 element_id
= config_element_process_attr_id
;
1767 case LTTNG_PROCESS_ATTR_USER_ID
:
1768 element_id_tracker
= config_element_process_attr_tracker_uid
;
1769 element_target_id
= config_element_process_attr_uid_value
;
1770 element_id
= config_element_process_attr_id
;
1772 case LTTNG_PROCESS_ATTR_VIRTUAL_USER_ID
:
1773 element_id_tracker
= config_element_process_attr_tracker_vuid
;
1774 element_target_id
= config_element_process_attr_vuid_value
;
1775 element_id
= config_element_process_attr_id
;
1777 case LTTNG_PROCESS_ATTR_GROUP_ID
:
1778 element_id_tracker
= config_element_process_attr_tracker_gid
;
1779 element_target_id
= config_element_process_attr_gid_value
;
1780 element_id
= config_element_process_attr_id
;
1782 case LTTNG_PROCESS_ATTR_VIRTUAL_GROUP_ID
:
1783 element_id_tracker
= config_element_process_attr_tracker_vgid
;
1784 element_target_id
= config_element_process_attr_vgid_value
;
1785 element_id
= config_element_process_attr_id
;
1788 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1793 case LTTNG_DOMAIN_KERNEL
:
1795 tracker
= kernel_get_process_attr_tracker(sess
->kernel_session
, process_attr
);
1796 LTTNG_ASSERT(tracker
);
1799 case LTTNG_DOMAIN_UST
:
1801 tracker
= trace_ust_get_process_attr_tracker(sess
->ust_session
, process_attr
);
1802 LTTNG_ASSERT(tracker
);
1805 case LTTNG_DOMAIN_JUL
:
1806 case LTTNG_DOMAIN_LOG4J
:
1807 case LTTNG_DOMAIN_PYTHON
:
1809 ret
= LTTNG_ERR_UNSUPPORTED_DOMAIN
;
1813 tracking_policy
= process_attr_tracker_get_tracking_policy(tracker
);
1814 if (tracking_policy
== LTTNG_TRACKING_POLICY_INCLUDE_ALL
) {
1815 /* Tracking all, nothing to output. */
1820 ret
= config_writer_open_element(writer
, element_id_tracker
);
1822 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1826 ret
= config_writer_open_element(writer
, config_element_process_attr_values
);
1828 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1832 if (tracking_policy
== LTTNG_TRACKING_POLICY_INCLUDE_SET
) {
1833 unsigned int i
, count
;
1834 enum process_attr_tracker_status status
=
1835 process_attr_tracker_get_inclusion_set(tracker
, &values
);
1837 if (status
!= PROCESS_ATTR_TRACKER_STATUS_OK
) {
1838 ret
= LTTNG_ERR_NOMEM
;
1842 count
= _lttng_process_attr_values_get_count(values
);
1844 for (i
= 0; i
< count
; i
++) {
1845 unsigned int integral_value
= UINT_MAX
;
1846 const char *name
= nullptr;
1847 const struct process_attr_value
*value
=
1848 lttng_process_attr_tracker_values_get_at_index(values
, i
);
1850 LTTNG_ASSERT(value
);
1851 ret
= config_writer_open_element(writer
, element_target_id
);
1853 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1857 switch (value
->type
) {
1858 case LTTNG_PROCESS_ATTR_VALUE_TYPE_PID
:
1859 integral_value
= (unsigned int) value
->value
.pid
;
1861 case LTTNG_PROCESS_ATTR_VALUE_TYPE_UID
:
1862 integral_value
= (unsigned int) value
->value
.uid
;
1864 case LTTNG_PROCESS_ATTR_VALUE_TYPE_GID
:
1865 integral_value
= (unsigned int) value
->value
.gid
;
1867 case LTTNG_PROCESS_ATTR_VALUE_TYPE_USER_NAME
:
1868 name
= value
->value
.user_name
;
1871 case LTTNG_PROCESS_ATTR_VALUE_TYPE_GROUP_NAME
:
1872 name
= value
->value
.group_name
;
1880 ret
= config_writer_write_element_string(
1881 writer
, config_element_name
, name
);
1883 ret
= config_writer_write_element_unsigned_int(
1884 writer
, element_id
, integral_value
);
1888 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1892 /* /$element_target_id */
1893 ret
= config_writer_close_element(writer
);
1895 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1902 ret
= config_writer_close_element(writer
);
1904 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1908 /* /$element_id_tracker */
1909 ret
= config_writer_close_element(writer
);
1911 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1917 lttng_process_attr_values_destroy(values
);
1921 /* Return LTTNG_OK on success else a LTTNG_ERR* code. */
1923 save_process_attr_trackers(struct config_writer
*writer
, struct ltt_session
*sess
, int domain
)
1928 case LTTNG_DOMAIN_KERNEL
:
1929 ret
= save_process_attr_tracker(
1930 writer
, sess
, domain
, LTTNG_PROCESS_ATTR_PROCESS_ID
);
1931 if (ret
!= LTTNG_OK
) {
1934 ret
= save_process_attr_tracker(
1935 writer
, sess
, domain
, LTTNG_PROCESS_ATTR_VIRTUAL_PROCESS_ID
);
1936 if (ret
!= LTTNG_OK
) {
1939 ret
= save_process_attr_tracker(writer
, sess
, domain
, LTTNG_PROCESS_ATTR_USER_ID
);
1940 if (ret
!= LTTNG_OK
) {
1943 ret
= save_process_attr_tracker(
1944 writer
, sess
, domain
, LTTNG_PROCESS_ATTR_VIRTUAL_USER_ID
);
1945 if (ret
!= LTTNG_OK
) {
1948 ret
= save_process_attr_tracker(writer
, sess
, domain
, LTTNG_PROCESS_ATTR_GROUP_ID
);
1949 if (ret
!= LTTNG_OK
) {
1952 ret
= save_process_attr_tracker(
1953 writer
, sess
, domain
, LTTNG_PROCESS_ATTR_VIRTUAL_GROUP_ID
);
1954 if (ret
!= LTTNG_OK
) {
1958 case LTTNG_DOMAIN_UST
:
1959 ret
= save_process_attr_tracker(
1960 writer
, sess
, domain
, LTTNG_PROCESS_ATTR_VIRTUAL_PROCESS_ID
);
1961 if (ret
!= LTTNG_OK
) {
1964 ret
= save_process_attr_tracker(
1965 writer
, sess
, domain
, LTTNG_PROCESS_ATTR_VIRTUAL_USER_ID
);
1966 if (ret
!= LTTNG_OK
) {
1969 ret
= save_process_attr_tracker(
1970 writer
, sess
, domain
, LTTNG_PROCESS_ATTR_VIRTUAL_GROUP_ID
);
1971 if (ret
!= LTTNG_OK
) {
1976 ret
= LTTNG_ERR_INVALID
;
1984 /* Return LTTNG_OK on success else a LTTNG_ERR* code. */
1985 static int save_ust_domain(struct config_writer
*writer
,
1986 struct ltt_session
*session
,
1987 enum lttng_domain_type domain
)
1990 struct ltt_ust_channel
*ust_chan
;
1991 const char *buffer_type_string
;
1992 struct lttng_ht_node_str
*node
;
1993 struct lttng_ht_iter iter
;
1994 const char *config_domain_name
;
1996 LTTNG_ASSERT(writer
);
1997 LTTNG_ASSERT(session
);
1999 ret
= config_writer_open_element(writer
, config_element_domain
);
2001 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2005 config_domain_name
= get_config_domain_str(domain
);
2006 if (!config_domain_name
) {
2007 ret
= LTTNG_ERR_INVALID
;
2011 ret
= config_writer_write_element_string(writer
, config_element_type
, config_domain_name
);
2013 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2017 buffer_type_string
= get_buffer_type_string(session
->ust_session
->buffer_type
);
2018 if (!buffer_type_string
) {
2019 ERR("Unsupported buffer type.");
2020 ret
= LTTNG_ERR_INVALID
;
2024 ret
= config_writer_write_element_string(
2025 writer
, config_element_buffer_type
, buffer_type_string
);
2027 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2031 ret
= config_writer_open_element(writer
, config_element_channels
);
2033 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2038 cds_lfht_for_each_entry (
2039 session
->ust_session
->domain_global
.channels
->ht
, &iter
.iter
, node
, node
) {
2040 ust_chan
= lttng::utils::container_of(node
, <t_ust_channel::node
);
2041 if (domain
== ust_chan
->domain
) {
2042 ret
= save_ust_channel(writer
, ust_chan
, session
->ust_session
);
2043 if (ret
!= LTTNG_OK
) {
2052 ret
= config_writer_close_element(writer
);
2054 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2058 if (domain
== LTTNG_DOMAIN_UST
) {
2059 ret
= config_writer_open_element(writer
, config_element_process_attr_trackers
);
2061 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2065 ret
= save_process_attr_trackers(writer
, session
, LTTNG_DOMAIN_UST
);
2066 if (ret
!= LTTNG_OK
) {
2071 ret
= config_writer_close_element(writer
);
2073 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2079 ret
= config_writer_close_element(writer
);
2081 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2090 /* Return LTTNG_OK on success else a LTTNG_ERR* code. */
2091 static int save_domains(struct config_writer
*writer
, struct ltt_session
*session
)
2095 LTTNG_ASSERT(writer
);
2096 LTTNG_ASSERT(session
);
2098 if (!session
->kernel_session
&& !session
->ust_session
) {
2102 ret
= config_writer_open_element(writer
, config_element_domains
);
2104 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2108 if (session
->kernel_session
) {
2109 ret
= config_writer_open_element(writer
, config_element_domain
);
2111 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2115 ret
= save_kernel_session(writer
, session
);
2116 if (ret
!= LTTNG_OK
) {
2120 ret
= config_writer_open_element(writer
, config_element_process_attr_trackers
);
2122 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2126 ret
= save_process_attr_trackers(writer
, session
, LTTNG_DOMAIN_KERNEL
);
2127 if (ret
!= LTTNG_OK
) {
2132 ret
= config_writer_close_element(writer
);
2134 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2138 ret
= config_writer_close_element(writer
);
2140 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2145 if (session
->ust_session
) {
2146 ret
= save_ust_domain(writer
, session
, LTTNG_DOMAIN_UST
);
2147 if (ret
!= LTTNG_OK
) {
2151 ret
= save_ust_domain(writer
, session
, LTTNG_DOMAIN_JUL
);
2152 if (ret
!= LTTNG_OK
) {
2156 ret
= save_ust_domain(writer
, session
, LTTNG_DOMAIN_LOG4J
);
2157 if (ret
!= LTTNG_OK
) {
2161 ret
= save_ust_domain(writer
, session
, LTTNG_DOMAIN_PYTHON
);
2162 if (ret
!= LTTNG_OK
) {
2168 ret
= config_writer_close_element(writer
);
2170 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2179 /* Return LTTNG_OK on success else a LTTNG_ERR* code. */
2180 static int save_consumer_output(struct config_writer
*writer
, struct consumer_output
*output
)
2184 LTTNG_ASSERT(writer
);
2185 LTTNG_ASSERT(output
);
2187 ret
= config_writer_open_element(writer
, config_element_consumer_output
);
2189 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2193 ret
= config_writer_write_element_bool(writer
, config_element_enabled
, output
->enabled
);
2195 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2199 ret
= config_writer_open_element(writer
, config_element_destination
);
2201 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2205 switch (output
->type
) {
2206 case CONSUMER_DST_LOCAL
:
2207 ret
= config_writer_write_element_string(
2208 writer
, config_element_path
, output
->dst
.session_root_path
);
2210 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2214 case CONSUMER_DST_NET
:
2218 uri
= calloc
<char>(PATH_MAX
);
2220 ret
= LTTNG_ERR_NOMEM
;
2224 ret
= config_writer_open_element(writer
, config_element_net_output
);
2226 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2227 goto end_net_output
;
2230 if (output
->dst
.net
.control_isset
&& output
->dst
.net
.data_isset
) {
2231 ret
= uri_to_str_url(&output
->dst
.net
.control
, uri
, PATH_MAX
);
2233 ret
= LTTNG_ERR_INVALID
;
2234 goto end_net_output
;
2237 ret
= config_writer_write_element_string(
2238 writer
, config_element_control_uri
, uri
);
2240 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2241 goto end_net_output
;
2244 ret
= uri_to_str_url(&output
->dst
.net
.data
, uri
, PATH_MAX
);
2246 ret
= LTTNG_ERR_INVALID
;
2247 goto end_net_output
;
2250 ret
= config_writer_write_element_string(
2251 writer
, config_element_data_uri
, uri
);
2253 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2254 goto end_net_output
;
2259 if (ret
!= LTTNG_OK
) {
2263 ret
= !output
->dst
.net
.control_isset
? LTTNG_ERR_URL_CTRL_MISS
:
2264 LTTNG_ERR_URL_DATA_MISS
;
2269 ret
= config_writer_close_element(writer
);
2271 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2277 ERR("Unsupported consumer output type.");
2278 ret
= LTTNG_ERR_INVALID
;
2283 ret
= config_writer_close_element(writer
);
2285 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2289 /* /consumer_output */
2290 ret
= config_writer_close_element(writer
);
2292 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2301 /* Return LTTNG_OK on success else a LTTNG_ERR* code. */
2302 static int save_snapshot_outputs(struct config_writer
*writer
, struct snapshot
*snapshot
)
2305 struct lttng_ht_iter iter
;
2306 struct snapshot_output
*output
;
2308 LTTNG_ASSERT(writer
);
2309 LTTNG_ASSERT(snapshot
);
2311 ret
= config_writer_open_element(writer
, config_element_snapshot_outputs
);
2313 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2318 cds_lfht_for_each_entry (snapshot
->output_ht
->ht
, &iter
.iter
, output
, node
.node
) {
2319 ret
= config_writer_open_element(writer
, config_element_output
);
2321 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2325 ret
= config_writer_write_element_string(writer
, config_element_name
, output
->name
);
2327 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2331 ret
= config_writer_write_element_unsigned_int(
2332 writer
, config_element_max_size
, output
->max_size
);
2334 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2338 ret
= save_consumer_output(writer
, output
->consumer
);
2339 if (ret
!= LTTNG_OK
) {
2344 ret
= config_writer_close_element(writer
);
2346 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2352 /* /snapshot_outputs */
2353 ret
= config_writer_close_element(writer
);
2355 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2367 /* Return LTTNG_OK on success else a LTTNG_ERR* code. */
2368 static int save_session_output(struct config_writer
*writer
, struct ltt_session
*session
)
2372 LTTNG_ASSERT(writer
);
2373 LTTNG_ASSERT(session
);
2375 if ((session
->snapshot_mode
&& session
->snapshot
.nb_output
== 0) ||
2376 (!session
->snapshot_mode
&& !session
->consumer
)) {
2377 /* Session is in no output mode */
2382 ret
= config_writer_open_element(writer
, config_element_output
);
2384 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2388 if (session
->snapshot_mode
) {
2389 ret
= save_snapshot_outputs(writer
, &session
->snapshot
);
2390 if (ret
!= LTTNG_OK
) {
2394 if (session
->consumer
) {
2395 ret
= save_consumer_output(writer
, session
->consumer
);
2396 if (ret
!= LTTNG_OK
) {
2403 ret
= config_writer_close_element(writer
);
2405 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2413 static int save_session_rotation_schedule(struct config_writer
*writer
,
2414 enum lttng_rotation_schedule_type type
,
2418 const char *element_name
;
2419 const char *value_name
;
2422 case LTTNG_ROTATION_SCHEDULE_TYPE_PERIODIC
:
2423 element_name
= config_element_rotation_schedule_periodic
;
2424 value_name
= config_element_rotation_schedule_periodic_time_us
;
2426 case LTTNG_ROTATION_SCHEDULE_TYPE_SIZE_THRESHOLD
:
2427 element_name
= config_element_rotation_schedule_size_threshold
;
2428 value_name
= config_element_rotation_schedule_size_threshold_bytes
;
2435 ret
= config_writer_open_element(writer
, element_name
);
2440 ret
= config_writer_write_element_unsigned_int(writer
, value_name
, value
);
2445 /* Close schedule descriptor element. */
2446 ret
= config_writer_close_element(writer
);
2454 static int save_session_rotation_schedules(struct config_writer
*writer
,
2455 struct ltt_session
*session
)
2459 ret
= config_writer_open_element(writer
, config_element_rotation_schedules
);
2463 if (session
->rotate_timer_period
) {
2464 ret
= save_session_rotation_schedule(writer
,
2465 LTTNG_ROTATION_SCHEDULE_TYPE_PERIODIC
,
2466 session
->rotate_timer_period
);
2468 goto close_schedules
;
2471 if (session
->rotate_size
) {
2472 ret
= save_session_rotation_schedule(
2473 writer
, LTTNG_ROTATION_SCHEDULE_TYPE_SIZE_THRESHOLD
, session
->rotate_size
);
2475 goto close_schedules
;
2480 /* Close rotation schedules element. */
2481 ret
= config_writer_close_element(writer
);
2490 * Save the given session.
2492 * Return LTTNG_OK on success else a LTTNG_ERR* code.
2494 static int save_session(struct ltt_session
*session
,
2495 struct lttng_save_session_attr
*attr
,
2496 lttng_sock_cred
*creds
)
2499 char config_file_path
[LTTNG_PATH_MAX
];
2501 struct config_writer
*writer
= nullptr;
2502 size_t session_name_len
;
2503 const char *provided_path
;
2504 int file_open_flags
= O_CREAT
| O_WRONLY
| O_TRUNC
;
2506 LTTNG_ASSERT(session
);
2508 LTTNG_ASSERT(creds
);
2510 session_name_len
= strlen(session
->name
);
2511 memset(config_file_path
, 0, sizeof(config_file_path
));
2513 if (!session_access_ok(session
, LTTNG_SOCK_GET_UID_CRED(creds
)) || session
->destroyed
) {
2514 ret
= LTTNG_ERR_EPERM
;
2518 provided_path
= lttng_save_session_attr_get_output_url(attr
);
2519 if (provided_path
) {
2520 DBG3("Save session in provided path %s", provided_path
);
2521 len
= strlen(provided_path
);
2522 if (len
>= sizeof(config_file_path
)) {
2523 ret
= LTTNG_ERR_SET_URL
;
2526 strncpy(config_file_path
, provided_path
, sizeof(config_file_path
));
2529 char *home_dir
= utils_get_user_home_dir(LTTNG_SOCK_GET_UID_CRED(creds
));
2531 ret
= LTTNG_ERR_SET_URL
;
2535 ret_len
= snprintf(config_file_path
,
2536 sizeof(config_file_path
),
2537 DEFAULT_SESSION_HOME_CONFIGPATH
,
2541 PERROR("snprintf save session");
2542 ret
= LTTNG_ERR_SET_URL
;
2549 * Check the path fits in the config file path dst including the '/'
2550 * followed by trailing .lttng extension and the NULL terminated string.
2552 if ((len
+ session_name_len
+ 2 + sizeof(DEFAULT_SESSION_CONFIG_FILE_EXTENSION
)) >
2553 sizeof(config_file_path
)) {
2554 ret
= LTTNG_ERR_SET_URL
;
2558 ret
= run_as_mkdir_recursive(config_file_path
,
2560 LTTNG_SOCK_GET_UID_CRED(creds
),
2561 LTTNG_SOCK_GET_GID_CRED(creds
));
2563 ret
= LTTNG_ERR_SET_URL
;
2568 * At this point, we know that everything fits in the buffer. Validation
2569 * was done just above.
2571 config_file_path
[len
++] = '/';
2572 strncpy(config_file_path
+ len
, session
->name
, sizeof(config_file_path
) - len
);
2573 len
+= session_name_len
;
2574 strcpy(config_file_path
+ len
, DEFAULT_SESSION_CONFIG_FILE_EXTENSION
);
2575 len
+= sizeof(DEFAULT_SESSION_CONFIG_FILE_EXTENSION
);
2576 config_file_path
[len
] = '\0';
2578 if (!attr
->overwrite
) {
2579 file_open_flags
|= O_EXCL
;
2582 fd
= run_as_open(config_file_path
,
2584 S_IRUSR
| S_IWUSR
| S_IRGRP
| S_IWGRP
,
2585 LTTNG_SOCK_GET_UID_CRED(creds
),
2586 LTTNG_SOCK_GET_GID_CRED(creds
));
2588 PERROR("Could not create configuration file");
2591 ret
= LTTNG_ERR_SAVE_FILE_EXIST
;
2594 ret
= LTTNG_ERR_EPERM
;
2597 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2603 writer
= config_writer_create(fd
, 1);
2605 ret
= LTTNG_ERR_NOMEM
;
2609 ret
= config_writer_open_element(writer
, config_element_sessions
);
2611 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2615 ret
= config_writer_open_element(writer
, config_element_session
);
2617 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2621 ret
= config_writer_write_element_string(writer
, config_element_name
, session
->name
);
2623 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2627 if (session
->shm_path
[0] != '\0') {
2628 ret
= config_writer_write_element_string(
2629 writer
, config_element_shared_memory_path
, session
->shm_path
);
2631 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2636 ret
= save_domains(writer
, session
);
2637 if (ret
!= LTTNG_OK
) {
2641 ret
= config_writer_write_element_bool(writer
, config_element_started
, session
->active
);
2643 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2647 if (session
->snapshot_mode
|| session
->live_timer
|| session
->rotate_timer_period
||
2648 session
->rotate_size
) {
2649 ret
= config_writer_open_element(writer
, config_element_attributes
);
2651 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2655 if (session
->snapshot_mode
) {
2656 ret
= config_writer_write_element_bool(
2657 writer
, config_element_snapshot_mode
, 1);
2659 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2662 } else if (session
->live_timer
) {
2663 ret
= config_writer_write_element_unsigned_int(
2664 writer
, config_element_live_timer_interval
, session
->live_timer
);
2666 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2670 if (session
->rotate_timer_period
|| session
->rotate_size
) {
2671 ret
= save_session_rotation_schedules(writer
, session
);
2673 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2679 ret
= config_writer_close_element(writer
);
2681 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2686 ret
= save_session_output(writer
, session
);
2687 if (ret
!= LTTNG_OK
) {
2692 ret
= config_writer_close_element(writer
);
2694 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2699 ret
= config_writer_close_element(writer
);
2701 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2707 if (writer
&& config_writer_destroy(writer
)) {
2708 /* Preserve the original error code */
2709 ret
= ret
!= LTTNG_OK
? ret
: LTTNG_ERR_SAVE_IO_FAIL
;
2711 if (ret
!= LTTNG_OK
) {
2712 /* Delete file in case of error */
2713 if ((fd
>= 0) && unlink(config_file_path
)) {
2714 PERROR("Unlinking XML session configuration.");
2721 closeret
= close(fd
);
2723 PERROR("Closing XML session configuration");
2730 int cmd_save_sessions(struct lttng_save_session_attr
*attr
, lttng_sock_cred
*creds
)
2733 const char *session_name
;
2734 struct ltt_session
*session
;
2736 session_lock_list();
2738 session_name
= lttng_save_session_attr_get_session_name(attr
);
2740 session
= session_find_by_name(session_name
);
2742 ret
= LTTNG_ERR_SESS_NOT_FOUND
;
2746 session_lock(session
);
2747 ret
= save_session(session
, attr
, creds
);
2748 session_unlock(session
);
2749 session_put(session
);
2750 if (ret
!= LTTNG_OK
) {
2754 struct ltt_session_list
*list
= session_get_list();
2756 cds_list_for_each_entry (session
, &list
->head
, list
) {
2757 if (!session_get(session
)) {
2760 session_lock(session
);
2761 ret
= save_session(session
, attr
, creds
);
2762 session_unlock(session
);
2763 session_put(session
);
2764 /* Don't abort if we don't have the required permissions. */
2765 if (ret
!= LTTNG_OK
&& ret
!= LTTNG_ERR_EPERM
) {
2773 session_unlock_list();