2 * Copyright (C) 2014 Jérémie Galarneau <jeremie.galarneau@efficios.com>
4 * SPDX-License-Identifier: GPL-2.0-only
12 #include <urcu/uatomic.h>
15 #include <common/defaults.h>
16 #include <common/error.h>
17 #include <common/config/session-config.h>
18 #include <common/utils.h>
19 #include <common/runas.h>
20 #include <lttng/save-internal.h>
25 #include "lttng-syscall.h"
26 #include "trace-ust.h"
29 /* Return LTTNG_OK on success else a LTTNG_ERR* code. */
31 int save_kernel_channel_attributes(struct config_writer
*writer
,
32 struct lttng_channel_attr
*attr
)
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
);
41 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
45 ret
= config_writer_write_element_unsigned_int(writer
,
46 config_element_subbuf_size
, attr
->subbuf_size
);
48 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
52 ret
= config_writer_write_element_unsigned_int(writer
,
53 config_element_num_subbuf
,
56 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
60 ret
= config_writer_write_element_unsigned_int(writer
,
61 config_element_switch_timer_interval
,
62 attr
->switch_timer_interval
);
64 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
68 ret
= config_writer_write_element_unsigned_int(writer
,
69 config_element_read_timer_interval
,
70 attr
->read_timer_interval
);
72 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
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
);
81 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
85 ret
= config_writer_write_element_unsigned_int(writer
,
86 config_element_tracefile_size
, attr
->tracefile_size
);
88 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
92 ret
= config_writer_write_element_unsigned_int(writer
,
93 config_element_tracefile_count
,
94 attr
->tracefile_count
);
96 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
100 ret
= config_writer_write_element_unsigned_int(writer
,
101 config_element_live_timer_interval
,
102 attr
->live_timer_interval
);
104 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
108 if (attr
->extended
.ptr
) {
109 struct lttng_channel_extended
*ext
= NULL
;
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
);
116 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
120 ret
= config_writer_write_element_signed_int(writer
,
121 config_element_blocking_timeout
,
122 ext
->blocking_timeout
);
124 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
134 /* Return LTTNG_OK on success else a LTTNG_ERR* code. */
136 int save_ust_channel_attributes(struct config_writer
*writer
,
137 struct lttng_ust_channel_attr
*attr
)
140 struct ltt_ust_channel
*channel
= NULL
;
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
);
147 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
151 ret
= config_writer_write_element_unsigned_int(writer
,
152 config_element_subbuf_size
, attr
->subbuf_size
);
154 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
158 ret
= config_writer_write_element_unsigned_int(writer
,
159 config_element_num_subbuf
,
162 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
166 ret
= config_writer_write_element_unsigned_int(writer
,
167 config_element_switch_timer_interval
,
168 attr
->switch_timer_interval
);
170 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
174 ret
= config_writer_write_element_unsigned_int(writer
,
175 config_element_read_timer_interval
,
176 attr
->read_timer_interval
);
178 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
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
);
187 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
191 ret
= config_writer_write_element_signed_int(writer
,
192 config_element_blocking_timeout
,
193 attr
->u
.s
.blocking_timeout
);
195 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
200 * Fetch the monitor timer which is located in the parent of
201 * lttng_ust_channel_attr
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
);
208 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
218 const char *get_kernel_instrumentation_string(
219 enum lttng_kernel_instrumentation instrumentation
)
221 const char *instrumentation_string
;
223 switch (instrumentation
) {
224 case LTTNG_KERNEL_ALL
:
225 instrumentation_string
= config_event_type_all
;
227 case LTTNG_KERNEL_TRACEPOINT
:
228 instrumentation_string
= config_event_type_tracepoint
;
230 case LTTNG_KERNEL_KPROBE
:
231 instrumentation_string
= config_event_type_probe
;
233 case LTTNG_KERNEL_UPROBE
:
234 instrumentation_string
= config_event_type_userspace_probe
;
236 case LTTNG_KERNEL_FUNCTION
:
237 instrumentation_string
= config_event_type_function_entry
;
239 case LTTNG_KERNEL_KRETPROBE
:
240 instrumentation_string
= config_event_type_function
;
242 case LTTNG_KERNEL_NOOP
:
243 instrumentation_string
= config_event_type_noop
;
245 case LTTNG_KERNEL_SYSCALL
:
246 instrumentation_string
= config_event_type_syscall
;
249 instrumentation_string
= NULL
;
252 return instrumentation_string
;
256 const char *get_kernel_context_type_string(
257 enum lttng_kernel_context_type context_type
)
259 const char *context_type_string
;
261 switch (context_type
) {
262 case LTTNG_KERNEL_CONTEXT_PID
:
263 context_type_string
= config_event_context_pid
;
265 case LTTNG_KERNEL_CONTEXT_PROCNAME
:
266 context_type_string
= config_event_context_procname
;
268 case LTTNG_KERNEL_CONTEXT_PRIO
:
269 context_type_string
= config_event_context_prio
;
271 case LTTNG_KERNEL_CONTEXT_NICE
:
272 context_type_string
= config_event_context_nice
;
274 case LTTNG_KERNEL_CONTEXT_VPID
:
275 context_type_string
= config_event_context_vpid
;
277 case LTTNG_KERNEL_CONTEXT_TID
:
278 context_type_string
= config_event_context_tid
;
280 case LTTNG_KERNEL_CONTEXT_VTID
:
281 context_type_string
= config_event_context_vtid
;
283 case LTTNG_KERNEL_CONTEXT_PPID
:
284 context_type_string
= config_event_context_ppid
;
286 case LTTNG_KERNEL_CONTEXT_VPPID
:
287 context_type_string
= config_event_context_vppid
;
289 case LTTNG_KERNEL_CONTEXT_HOSTNAME
:
290 context_type_string
= config_event_context_hostname
;
292 case LTTNG_KERNEL_CONTEXT_INTERRUPTIBLE
:
293 context_type_string
= config_event_context_interruptible
;
295 case LTTNG_KERNEL_CONTEXT_PREEMPTIBLE
:
296 context_type_string
= config_event_context_preemptible
;
298 case LTTNG_KERNEL_CONTEXT_NEED_RESCHEDULE
:
299 context_type_string
= config_event_context_need_reschedule
;
301 case LTTNG_KERNEL_CONTEXT_MIGRATABLE
:
302 context_type_string
= config_event_context_migratable
;
304 case LTTNG_KERNEL_CONTEXT_CALLSTACK_USER
:
305 context_type_string
= config_event_context_callstack_user
;
307 case LTTNG_KERNEL_CONTEXT_CALLSTACK_KERNEL
:
308 context_type_string
= config_event_context_callstack_kernel
;
310 case LTTNG_KERNEL_CONTEXT_CGROUP_NS
:
311 context_type_string
= config_event_context_cgroup_ns
;
313 case LTTNG_KERNEL_CONTEXT_IPC_NS
:
314 context_type_string
= config_event_context_ipc_ns
;
316 case LTTNG_KERNEL_CONTEXT_MNT_NS
:
317 context_type_string
= config_event_context_mnt_ns
;
319 case LTTNG_KERNEL_CONTEXT_NET_NS
:
320 context_type_string
= config_event_context_net_ns
;
322 case LTTNG_KERNEL_CONTEXT_PID_NS
:
323 context_type_string
= config_event_context_pid_ns
;
325 case LTTNG_KERNEL_CONTEXT_USER_NS
:
326 context_type_string
= config_event_context_user_ns
;
328 case LTTNG_KERNEL_CONTEXT_UTS_NS
:
329 context_type_string
= config_event_context_uts_ns
;
331 case LTTNG_KERNEL_CONTEXT_UID
:
332 context_type_string
= config_event_context_uid
;
334 case LTTNG_KERNEL_CONTEXT_EUID
:
335 context_type_string
= config_event_context_euid
;
337 case LTTNG_KERNEL_CONTEXT_SUID
:
338 context_type_string
= config_event_context_suid
;
340 case LTTNG_KERNEL_CONTEXT_GID
:
341 context_type_string
= config_event_context_gid
;
343 case LTTNG_KERNEL_CONTEXT_EGID
:
344 context_type_string
= config_event_context_egid
;
346 case LTTNG_KERNEL_CONTEXT_SGID
:
347 context_type_string
= config_event_context_sgid
;
349 case LTTNG_KERNEL_CONTEXT_VUID
:
350 context_type_string
= config_event_context_vuid
;
352 case LTTNG_KERNEL_CONTEXT_VEUID
:
353 context_type_string
= config_event_context_veuid
;
355 case LTTNG_KERNEL_CONTEXT_VSUID
:
356 context_type_string
= config_event_context_vsuid
;
358 case LTTNG_KERNEL_CONTEXT_VGID
:
359 context_type_string
= config_event_context_vgid
;
361 case LTTNG_KERNEL_CONTEXT_VEGID
:
362 context_type_string
= config_event_context_vegid
;
364 case LTTNG_KERNEL_CONTEXT_VSGID
:
365 context_type_string
= config_event_context_vsgid
;
368 context_type_string
= NULL
;
371 return context_type_string
;
375 const char *get_ust_context_type_string(
376 enum lttng_ust_context_type context_type
)
378 const char *context_type_string
;
380 switch (context_type
) {
381 case LTTNG_UST_CONTEXT_PROCNAME
:
382 context_type_string
= config_event_context_procname
;
384 case LTTNG_UST_CONTEXT_VPID
:
385 context_type_string
= config_event_context_vpid
;
387 case LTTNG_UST_CONTEXT_VTID
:
388 context_type_string
= config_event_context_vtid
;
390 case LTTNG_UST_CONTEXT_IP
:
391 context_type_string
= config_event_context_ip
;
393 case LTTNG_UST_CONTEXT_PTHREAD_ID
:
394 context_type_string
= config_event_context_pthread_id
;
396 case LTTNG_UST_CONTEXT_APP_CONTEXT
:
397 context_type_string
= config_event_context_app
;
399 case LTTNG_UST_CONTEXT_CGROUP_NS
:
400 context_type_string
= config_event_context_cgroup_ns
;
402 case LTTNG_UST_CONTEXT_IPC_NS
:
403 context_type_string
= config_event_context_ipc_ns
;
405 case LTTNG_UST_CONTEXT_MNT_NS
:
406 context_type_string
= config_event_context_mnt_ns
;
408 case LTTNG_UST_CONTEXT_NET_NS
:
409 context_type_string
= config_event_context_net_ns
;
411 case LTTNG_UST_CONTEXT_PID_NS
:
412 context_type_string
= config_event_context_pid_ns
;
414 case LTTNG_UST_CONTEXT_USER_NS
:
415 context_type_string
= config_event_context_user_ns
;
417 case LTTNG_UST_CONTEXT_UTS_NS
:
418 context_type_string
= config_event_context_uts_ns
;
420 case LTTNG_UST_CONTEXT_VUID
:
421 context_type_string
= config_event_context_vuid
;
423 case LTTNG_UST_CONTEXT_VEUID
:
424 context_type_string
= config_event_context_veuid
;
426 case LTTNG_UST_CONTEXT_VSUID
:
427 context_type_string
= config_event_context_vsuid
;
429 case LTTNG_UST_CONTEXT_VGID
:
430 context_type_string
= config_event_context_vgid
;
432 case LTTNG_UST_CONTEXT_VEGID
:
433 context_type_string
= config_event_context_vegid
;
435 case LTTNG_UST_CONTEXT_VSGID
:
436 context_type_string
= config_event_context_vsgid
;
438 case LTTNG_UST_CONTEXT_PERF_THREAD_COUNTER
:
440 * Error, should not be stored in the XML, perf contexts
441 * are stored as a node of type event_perf_context_type.
444 context_type_string
= NULL
;
448 return context_type_string
;
452 const char *get_buffer_type_string(
453 enum lttng_buffer_type buffer_type
)
455 const char *buffer_type_string
;
457 switch (buffer_type
) {
458 case LTTNG_BUFFER_PER_PID
:
459 buffer_type_string
= config_buffer_type_per_pid
;
461 case LTTNG_BUFFER_PER_UID
:
462 buffer_type_string
= config_buffer_type_per_uid
;
464 case LTTNG_BUFFER_GLOBAL
:
465 buffer_type_string
= config_buffer_type_global
;
468 buffer_type_string
= NULL
;
471 return buffer_type_string
;
475 const char *get_loglevel_type_string(
476 enum lttng_ust_loglevel_type loglevel_type
)
478 const char *loglevel_type_string
;
480 switch (loglevel_type
) {
481 case LTTNG_UST_LOGLEVEL_ALL
:
482 loglevel_type_string
= config_loglevel_type_all
;
484 case LTTNG_UST_LOGLEVEL_RANGE
:
485 loglevel_type_string
= config_loglevel_type_range
;
487 case LTTNG_UST_LOGLEVEL_SINGLE
:
488 loglevel_type_string
= config_loglevel_type_single
;
491 loglevel_type_string
= NULL
;
494 return loglevel_type_string
;
497 /* Return LTTNG_OK on success else a LTTNG_ERR* code. */
499 int save_kernel_function_event(struct config_writer
*writer
,
500 struct ltt_kernel_event
*event
)
504 ret
= config_writer_open_element(writer
, config_element_function_attributes
);
506 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
510 ret
= config_writer_write_element_string(writer
, config_element_name
,
511 event
->event
->u
.ftrace
.symbol_name
);
513 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
517 /* /function attributes */
518 ret
= config_writer_close_element(writer
);
520 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
528 int save_kernel_kprobe_event(struct config_writer
*writer
,
529 struct ltt_kernel_event
*event
)
532 const char *symbol_name
;
536 switch (event
->event
->instrumentation
) {
537 case LTTNG_KERNEL_KPROBE
:
539 * Comments in lttng-kernel.h mention that
540 * either addr or symbol_name are set, not both.
542 addr
= event
->event
->u
.kprobe
.addr
;
543 offset
= event
->event
->u
.kprobe
.offset
;
544 symbol_name
= addr
? NULL
: event
->event
->u
.kprobe
.symbol_name
;
546 case LTTNG_KERNEL_KRETPROBE
:
547 addr
= event
->event
->u
.kretprobe
.addr
;
548 offset
= event
->event
->u
.kretprobe
.offset
;
549 symbol_name
= addr
? NULL
: event
->event
->u
.kretprobe
.symbol_name
;
553 ERR("Unsupported kernel instrumentation type.");
554 ret
= LTTNG_ERR_INVALID
;
558 ret
= config_writer_open_element(writer
, config_element_probe_attributes
);
560 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
565 ret
= config_writer_write_element_unsigned_int( writer
,
566 config_element_address
, addr
);
568 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
571 } else if (symbol_name
) {
572 ret
= config_writer_write_element_string(writer
,
573 config_element_symbol_name
, symbol_name
);
575 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
578 /* If the offset is non-zero, write it.*/
580 ret
= config_writer_write_element_unsigned_int(writer
,
581 config_element_offset
, offset
);
583 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
589 * This really should not happen as we are either setting the
590 * address or the symbol above.
592 ERR("Invalid probe/function description.");
593 ret
= LTTNG_ERR_INVALID
;
598 ret
= config_writer_close_element(writer
);
600 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
608 * Save the userspace probe tracepoint event associated with the event to the
612 int save_kernel_userspace_probe_tracepoint_event(struct config_writer
*writer
,
613 struct ltt_kernel_event
*event
)
616 const char *probe_name
, *provider_name
, *binary_path
;
617 const struct lttng_userspace_probe_location
*userspace_probe_location
;
618 const struct lttng_userspace_probe_location_lookup_method
*lookup_method
;
619 enum lttng_userspace_probe_location_lookup_method_type lookup_type
;
621 /* Get userspace probe location from the event. */
622 userspace_probe_location
= event
->userspace_probe_location
;
623 if (!userspace_probe_location
) {
624 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
628 /* Get lookup method and lookup method type. */
629 lookup_method
= lttng_userspace_probe_location_get_lookup_method(userspace_probe_location
);
630 if (!lookup_method
) {
631 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
635 lookup_type
= lttng_userspace_probe_location_lookup_method_get_type(lookup_method
);
637 /* Get the binary path, probe name and provider name. */
639 lttng_userspace_probe_location_tracepoint_get_binary_path(
640 userspace_probe_location
);
642 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
647 lttng_userspace_probe_location_tracepoint_get_probe_name(
648 userspace_probe_location
);
650 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
655 lttng_userspace_probe_location_tracepoint_get_provider_name(
656 userspace_probe_location
);
657 if (!provider_name
) {
658 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
662 /* Open a userspace probe tracepoint attribute. */
663 ret
= config_writer_open_element(writer
, config_element_userspace_probe_tracepoint_attributes
);
665 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
669 switch (lookup_type
) {
670 case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT
:
671 ret
= config_writer_write_element_string(writer
,
672 config_element_userspace_probe_lookup
,
673 config_element_userspace_probe_lookup_tracepoint_sdt
);
675 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
680 ERR("Unsupported kernel userspace probe tracepoint lookup method.");
681 ret
= LTTNG_ERR_INVALID
;
685 /* Write the binary path, provider name and the probe name. */
686 ret
= config_writer_write_element_string(writer
,
687 config_element_userspace_probe_location_binary_path
,
690 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
694 ret
= config_writer_write_element_string(writer
,
695 config_element_userspace_probe_tracepoint_location_provider_name
,
698 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
702 ret
= config_writer_write_element_string(writer
,
703 config_element_userspace_probe_tracepoint_location_probe_name
,
706 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
710 /* Close the userspace probe tracepoint attribute. */
711 ret
= config_writer_close_element(writer
);
713 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
722 * Save the userspace probe function event associated with the event to the
726 int save_kernel_userspace_probe_function_event(struct config_writer
*writer
,
727 struct ltt_kernel_event
*event
)
730 const char *function_name
, *binary_path
;
731 const struct lttng_userspace_probe_location
*userspace_probe_location
;
732 const struct lttng_userspace_probe_location_lookup_method
*lookup_method
;
733 enum lttng_userspace_probe_location_lookup_method_type lookup_type
;
735 /* Get userspace probe location from the event. */
736 userspace_probe_location
= event
->userspace_probe_location
;
737 if (!userspace_probe_location
) {
738 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
742 /* Get lookup method and lookup method type. */
743 lookup_method
= lttng_userspace_probe_location_get_lookup_method(
744 userspace_probe_location
);
745 if (!lookup_method
) {
746 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
750 /* Get the binary path and the function name. */
752 lttng_userspace_probe_location_function_get_binary_path(
753 userspace_probe_location
);
755 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
760 lttng_userspace_probe_location_function_get_function_name(
761 userspace_probe_location
);
762 if (!function_name
) {
763 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
767 /* Open a userspace probe function attribute. */
768 ret
= config_writer_open_element(writer
,
769 config_element_userspace_probe_function_attributes
);
771 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
775 lookup_type
= lttng_userspace_probe_location_lookup_method_get_type(lookup_method
);
776 switch (lookup_type
) {
777 case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF
:
778 ret
= config_writer_write_element_string(writer
,
779 config_element_userspace_probe_lookup
,
780 config_element_userspace_probe_lookup_function_elf
);
782 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
786 case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_DEFAULT
:
787 ret
= config_writer_write_element_string(writer
,
788 config_element_userspace_probe_lookup
,
789 config_element_userspace_probe_lookup_function_default
);
791 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
796 ERR("Unsupported kernel userspace probe function lookup method.");
797 ret
= LTTNG_ERR_INVALID
;
801 /* Write the binary path and the function name. */
802 ret
= config_writer_write_element_string(writer
,
803 config_element_userspace_probe_location_binary_path
,
806 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
810 ret
= config_writer_write_element_string(writer
,
811 config_element_userspace_probe_function_location_function_name
,
814 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
818 /* Close the userspace probe function attribute. */
819 ret
= config_writer_close_element(writer
);
821 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
830 int save_kernel_userspace_probe_event(struct config_writer
*writer
,
831 struct ltt_kernel_event
*event
)
834 struct lttng_userspace_probe_location
*userspace_probe_location
;
836 /* Get userspace probe location from the event. */
837 userspace_probe_location
= event
->userspace_probe_location
;
838 if (!userspace_probe_location
) {
839 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
843 switch(lttng_userspace_probe_location_get_type(userspace_probe_location
)) {
844 case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION
:
846 ret
= save_kernel_userspace_probe_function_event(writer
, event
);
848 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
853 case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT
:
855 ret
= save_kernel_userspace_probe_tracepoint_event(writer
, event
);
857 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
862 case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_UNKNOWN
:
864 ERR("Unsupported kernel userspace probe location type.");
865 ret
= LTTNG_ERR_INVALID
;
874 int save_kernel_event(struct config_writer
*writer
,
875 struct ltt_kernel_event
*event
)
878 const char *instrumentation_type
;
880 ret
= config_writer_open_element(writer
, config_element_event
);
882 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
886 if (event
->event
->name
[0]) {
887 ret
= config_writer_write_element_string(writer
,
888 config_element_name
, event
->event
->name
);
890 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
895 ret
= config_writer_write_element_bool(writer
, config_element_enabled
,
898 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
902 instrumentation_type
= get_kernel_instrumentation_string(
903 event
->event
->instrumentation
);
904 if (!instrumentation_type
) {
905 ret
= LTTNG_ERR_INVALID
;
909 ret
= config_writer_write_element_string(writer
, config_element_type
,
910 instrumentation_type
);
912 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
916 if (event
->filter_expression
) {
917 ret
= config_writer_write_element_string(writer
,
918 config_element_filter
,
919 event
->filter_expression
);
921 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
926 if (event
->event
->instrumentation
== LTTNG_KERNEL_FUNCTION
||
927 event
->event
->instrumentation
== LTTNG_KERNEL_KPROBE
||
928 event
->event
->instrumentation
== LTTNG_KERNEL_UPROBE
||
929 event
->event
->instrumentation
== LTTNG_KERNEL_KRETPROBE
) {
931 ret
= config_writer_open_element(writer
,
932 config_element_attributes
);
934 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
938 switch (event
->event
->instrumentation
) {
939 case LTTNG_KERNEL_SYSCALL
:
940 case LTTNG_KERNEL_FUNCTION
:
941 ret
= save_kernel_function_event(writer
, event
);
946 case LTTNG_KERNEL_KPROBE
:
947 case LTTNG_KERNEL_KRETPROBE
:
948 ret
= save_kernel_kprobe_event(writer
, event
);
953 case LTTNG_KERNEL_UPROBE
:
954 ret
= save_kernel_userspace_probe_event(writer
, event
);
960 ERR("Unsupported kernel instrumentation type.");
961 ret
= LTTNG_ERR_INVALID
;
966 ret
= config_writer_close_element(writer
);
968 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
974 ret
= config_writer_close_element(writer
);
976 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
985 /* Return LTTNG_OK on success else a LTTNG_ERR* code. */
987 int save_kernel_events(struct config_writer
*writer
,
988 struct ltt_kernel_channel
*kchan
)
991 struct ltt_kernel_event
*event
;
993 ret
= config_writer_open_element(writer
, config_element_events
);
995 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
999 cds_list_for_each_entry(event
, &kchan
->events_list
.head
, list
) {
1000 ret
= save_kernel_event(writer
, event
);
1001 if (ret
!= LTTNG_OK
) {
1007 ret
= config_writer_close_element(writer
);
1009 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1018 /* Return LTTNG_OK on success else a LTTNG_ERR* code. */
1020 int save_ust_event(struct config_writer
*writer
,
1021 struct ltt_ust_event
*event
)
1024 const char *loglevel_type_string
;
1026 ret
= config_writer_open_element(writer
, config_element_event
);
1028 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1032 if (event
->attr
.name
[0]) {
1033 ret
= config_writer_write_element_string(writer
,
1034 config_element_name
, event
->attr
.name
);
1036 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1041 ret
= config_writer_write_element_bool(writer
, config_element_enabled
,
1044 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1048 if (event
->attr
.instrumentation
!= LTTNG_UST_TRACEPOINT
) {
1049 ERR("Unsupported UST instrumentation type.");
1050 ret
= LTTNG_ERR_INVALID
;
1053 ret
= config_writer_write_element_string(writer
, config_element_type
,
1054 config_event_type_tracepoint
);
1056 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1060 loglevel_type_string
= get_loglevel_type_string(
1061 event
->attr
.loglevel_type
);
1062 if (!loglevel_type_string
) {
1063 ERR("Unsupported UST loglevel type.");
1064 ret
= LTTNG_ERR_INVALID
;
1068 ret
= config_writer_write_element_string(writer
,
1069 config_element_loglevel_type
, loglevel_type_string
);
1071 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1075 /* The log level is irrelevant if no "filtering" is enabled */
1076 if (event
->attr
.loglevel_type
!= LTTNG_UST_LOGLEVEL_ALL
) {
1077 ret
= config_writer_write_element_signed_int(writer
,
1078 config_element_loglevel
, event
->attr
.loglevel
);
1080 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1085 if (event
->filter_expression
) {
1086 ret
= config_writer_write_element_string(writer
,
1087 config_element_filter
, event
->filter_expression
);
1089 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1094 if (event
->exclusion
&& event
->exclusion
->count
) {
1097 ret
= config_writer_open_element(writer
,
1098 config_element_exclusions
);
1100 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1104 for (i
= 0; i
< event
->exclusion
->count
; i
++) {
1105 ret
= config_writer_write_element_string(writer
,
1106 config_element_exclusion
,
1107 LTTNG_EVENT_EXCLUSION_NAME_AT(
1108 event
->exclusion
, i
));
1110 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1116 ret
= config_writer_close_element(writer
);
1118 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1124 ret
= config_writer_close_element(writer
);
1126 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1135 /* Return LTTNG_OK on success else a LTTNG_ERR* code. */
1137 int save_ust_events(struct config_writer
*writer
,
1138 struct lttng_ht
*events
)
1141 struct ltt_ust_event
*event
;
1142 struct lttng_ht_node_str
*node
;
1143 struct lttng_ht_iter iter
;
1145 ret
= config_writer_open_element(writer
, config_element_events
);
1147 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1152 cds_lfht_for_each_entry(events
->ht
, &iter
.iter
, node
, node
) {
1153 event
= caa_container_of(node
, struct ltt_ust_event
, node
);
1155 if (event
->internal
) {
1156 /* Internal events must not be exposed to clients */
1159 ret
= save_ust_event(writer
, event
);
1160 if (ret
!= LTTNG_OK
) {
1168 ret
= config_writer_close_element(writer
);
1170 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1179 /* Return LTTNG_OK on success else a LTTNG_ERR* code. */
1181 int init_ust_event_from_agent_event(struct ltt_ust_event
*ust_event
,
1182 struct agent_event
*agent_event
)
1185 enum lttng_ust_loglevel_type ust_loglevel_type
;
1187 ust_event
->enabled
= agent_event
->enabled
;
1188 ust_event
->attr
.instrumentation
= LTTNG_UST_TRACEPOINT
;
1189 if (lttng_strncpy(ust_event
->attr
.name
, agent_event
->name
,
1190 LTTNG_SYMBOL_NAME_LEN
)) {
1191 ret
= LTTNG_ERR_INVALID
;
1194 switch (agent_event
->loglevel_type
) {
1195 case LTTNG_EVENT_LOGLEVEL_ALL
:
1196 ust_loglevel_type
= LTTNG_UST_LOGLEVEL_ALL
;
1198 case LTTNG_EVENT_LOGLEVEL_SINGLE
:
1199 ust_loglevel_type
= LTTNG_UST_LOGLEVEL_SINGLE
;
1201 case LTTNG_EVENT_LOGLEVEL_RANGE
:
1202 ust_loglevel_type
= LTTNG_UST_LOGLEVEL_RANGE
;
1205 ERR("Invalid agent_event loglevel_type.");
1206 ret
= LTTNG_ERR_INVALID
;
1210 ust_event
->attr
.loglevel_type
= ust_loglevel_type
;
1211 ust_event
->attr
.loglevel
= agent_event
->loglevel_value
;
1212 ust_event
->filter_expression
= agent_event
->filter_expression
;
1213 ust_event
->exclusion
= agent_event
->exclusion
;
1220 /* Return LTTNG_OK on success else a LTTNG_ERR* code. */
1222 int save_agent_events(struct config_writer
*writer
,
1223 struct agent
*agent
)
1226 struct lttng_ht_iter iter
;
1227 struct lttng_ht_node_str
*node
;
1229 ret
= config_writer_open_element(writer
, config_element_events
);
1231 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1236 cds_lfht_for_each_entry(agent
->events
->ht
, &iter
.iter
, node
, node
) {
1237 struct agent_event
*agent_event
;
1238 struct ltt_ust_event fake_event
;
1240 memset(&fake_event
, 0, sizeof(fake_event
));
1241 agent_event
= caa_container_of(node
, struct agent_event
, node
);
1244 * Initialize a fake ust event to reuse the same serialization
1245 * function since UST and agent events contain the same info
1246 * (and one could wonder why they don't reuse the same
1249 ret
= init_ust_event_from_agent_event(&fake_event
, agent_event
);
1250 if (ret
!= LTTNG_OK
) {
1254 ret
= save_ust_event(writer
, &fake_event
);
1255 if (ret
!= LTTNG_OK
) {
1263 ret
= config_writer_close_element(writer
);
1265 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1274 /* Return LTTNG_OK on success else a LTTNG_ERR* code. */
1276 int save_kernel_context(struct config_writer
*writer
,
1277 struct lttng_kernel_context
*ctx
)
1285 ret
= config_writer_open_element(writer
, config_element_context
);
1287 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1291 if (ctx
->ctx
== LTTNG_KERNEL_CONTEXT_PERF_CPU_COUNTER
) {
1292 ret
= config_writer_open_element(writer
,
1293 config_element_context_perf
);
1295 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1299 ret
= config_writer_write_element_unsigned_int(writer
,
1300 config_element_type
, ctx
->u
.perf_counter
.type
);
1302 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1306 ret
= config_writer_write_element_unsigned_int(writer
,
1307 config_element_config
, ctx
->u
.perf_counter
.config
);
1309 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1313 ret
= config_writer_write_element_string(writer
,
1314 config_element_name
, ctx
->u
.perf_counter
.name
);
1316 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1321 ret
= config_writer_close_element(writer
);
1323 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1327 const char *context_type_string
=
1328 get_kernel_context_type_string(ctx
->ctx
);
1330 if (!context_type_string
) {
1331 ERR("Unsupported kernel context type.");
1332 ret
= LTTNG_ERR_INVALID
;
1336 ret
= config_writer_write_element_string(writer
,
1337 config_element_type
, context_type_string
);
1339 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1345 ret
= config_writer_close_element(writer
);
1347 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1356 /* Return LTTNG_OK on success else a LTTNG_ERR* code. */
1358 int save_kernel_contexts(struct config_writer
*writer
,
1359 struct ltt_kernel_channel
*kchan
)
1362 struct ltt_kernel_context
*ctx
;
1364 if (cds_list_empty(&kchan
->ctx_list
)) {
1369 ret
= config_writer_open_element(writer
, config_element_contexts
);
1371 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1375 cds_list_for_each_entry(ctx
, &kchan
->ctx_list
, list
) {
1376 ret
= save_kernel_context(writer
, &ctx
->ctx
);
1377 if (ret
!= LTTNG_OK
) {
1383 ret
= config_writer_close_element(writer
);
1385 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1394 /* Return LTTNG_OK on success else a LTTNG_ERR* code. */
1396 int save_ust_context_perf_thread_counter(struct config_writer
*writer
,
1397 struct ltt_ust_context
*ctx
)
1404 /* Perf contexts are saved as event_perf_context_type */
1405 ret
= config_writer_open_element(writer
, config_element_context_perf
);
1407 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1411 ret
= config_writer_write_element_unsigned_int(writer
,
1412 config_element_type
, ctx
->ctx
.u
.perf_counter
.type
);
1414 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1418 ret
= config_writer_write_element_unsigned_int(writer
,
1419 config_element_config
, ctx
->ctx
.u
.perf_counter
.config
);
1421 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1425 ret
= config_writer_write_element_string(writer
, config_element_name
,
1426 ctx
->ctx
.u
.perf_counter
.name
);
1428 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1433 ret
= config_writer_close_element(writer
);
1435 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1444 /* Return LTTNG_OK on success else a LTTNG_ERR* code. */
1446 int save_ust_context_app_ctx(struct config_writer
*writer
,
1447 struct ltt_ust_context
*ctx
)
1454 /* Application contexts are saved as application_context_type */
1455 ret
= config_writer_open_element(writer
, config_element_context_app
);
1457 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1461 ret
= config_writer_write_element_string(writer
,
1462 config_element_context_app_provider_name
,
1463 ctx
->ctx
.u
.app_ctx
.provider_name
);
1465 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1469 ret
= config_writer_write_element_string(writer
,
1470 config_element_context_app_ctx_name
,
1471 ctx
->ctx
.u
.app_ctx
.ctx_name
);
1473 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1478 ret
= config_writer_close_element(writer
);
1480 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1489 /* Return LTTNG_OK on success else a LTTNG_ERR* code. */
1491 int save_ust_context_generic(struct config_writer
*writer
,
1492 struct ltt_ust_context
*ctx
)
1495 const char *context_type_string
;
1500 /* Save context as event_context_type_type */
1501 context_type_string
= get_ust_context_type_string(
1503 if (!context_type_string
) {
1504 ERR("Unsupported UST context type.");
1505 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1509 ret
= config_writer_write_element_string(writer
,
1510 config_element_type
, context_type_string
);
1512 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1521 /* Return LTTNG_OK on success else a LTTNG_ERR* code. */
1523 int save_ust_context(struct config_writer
*writer
,
1524 struct cds_list_head
*ctx_list
)
1527 struct ltt_ust_context
*ctx
;
1532 ret
= config_writer_open_element(writer
, config_element_contexts
);
1534 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1538 cds_list_for_each_entry(ctx
, ctx_list
, list
) {
1539 ret
= config_writer_open_element(writer
,
1540 config_element_context
);
1542 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1546 switch (ctx
->ctx
.ctx
) {
1547 case LTTNG_UST_CONTEXT_PERF_THREAD_COUNTER
:
1548 ret
= save_ust_context_perf_thread_counter(writer
, ctx
);
1550 case LTTNG_UST_CONTEXT_APP_CONTEXT
:
1551 ret
= save_ust_context_app_ctx(writer
, ctx
);
1554 /* Save generic context. */
1555 ret
= save_ust_context_generic(writer
, ctx
);
1557 if (ret
!= LTTNG_OK
) {
1562 ret
= config_writer_close_element(writer
);
1564 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1570 ret
= config_writer_close_element(writer
);
1572 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1581 /* Return LTTNG_OK on success else a LTTNG_ERR* code. */
1583 int save_kernel_channel(struct config_writer
*writer
,
1584 struct ltt_kernel_channel
*kchan
)
1591 ret
= config_writer_open_element(writer
, config_element_channel
);
1593 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1597 ret
= config_writer_write_element_string(writer
, config_element_name
,
1598 kchan
->channel
->name
);
1600 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1604 ret
= config_writer_write_element_bool(writer
, config_element_enabled
,
1605 kchan
->channel
->enabled
);
1607 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1611 ret
= save_kernel_channel_attributes(writer
, &kchan
->channel
->attr
);
1612 if (ret
!= LTTNG_OK
) {
1616 ret
= save_kernel_events(writer
, kchan
);
1617 if (ret
!= LTTNG_OK
) {
1621 ret
= save_kernel_contexts(writer
, kchan
);
1622 if (ret
!= LTTNG_OK
) {
1627 ret
= config_writer_close_element(writer
);
1629 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1638 /* Return LTTNG_OK on success else a LTTNG_ERR* code. */
1640 int save_ust_channel(struct config_writer
*writer
,
1641 struct ltt_ust_channel
*ust_chan
,
1642 struct ltt_ust_session
*session
)
1650 ret
= config_writer_open_element(writer
, config_element_channel
);
1652 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1656 ret
= config_writer_write_element_string(writer
, config_element_name
,
1659 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1663 ret
= config_writer_write_element_bool(writer
, config_element_enabled
,
1666 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1670 ret
= save_ust_channel_attributes(writer
, &ust_chan
->attr
);
1671 if (ret
!= LTTNG_OK
) {
1675 ret
= config_writer_write_element_unsigned_int(writer
,
1676 config_element_tracefile_size
, ust_chan
->tracefile_size
);
1678 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1682 ret
= config_writer_write_element_unsigned_int(writer
,
1683 config_element_tracefile_count
, ust_chan
->tracefile_count
);
1685 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1689 ret
= config_writer_write_element_unsigned_int(writer
,
1690 config_element_live_timer_interval
,
1691 session
->live_timer_interval
);
1693 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1697 if (ust_chan
->domain
== LTTNG_DOMAIN_UST
) {
1698 ret
= save_ust_events(writer
, ust_chan
->events
);
1699 if (ret
!= LTTNG_OK
) {
1703 struct agent
*agent
= NULL
;
1705 agent
= trace_ust_find_agent(session
, ust_chan
->domain
);
1707 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1708 ERR("Could not find agent associated to UST subdomain");
1713 * Channels associated with a UST sub-domain (such as JUL, Log4j
1714 * or Python) don't have any non-internal events. We retrieve
1715 * the "agent" events associated with this channel and serialize
1718 ret
= save_agent_events(writer
, agent
);
1719 if (ret
!= LTTNG_OK
) {
1724 ret
= save_ust_context(writer
, &ust_chan
->ctx_list
);
1725 if (ret
!= LTTNG_OK
) {
1730 ret
= config_writer_close_element(writer
);
1732 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1741 /* Return LTTNG_OK on success else a LTTNG_ERR* code. */
1743 int save_kernel_session(struct config_writer
*writer
,
1744 struct ltt_session
*session
)
1747 struct ltt_kernel_channel
*kchan
;
1752 ret
= config_writer_write_element_string(writer
, config_element_type
,
1753 config_domain_type_kernel
);
1755 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1759 ret
= config_writer_write_element_string(writer
,
1760 config_element_buffer_type
, config_buffer_type_global
);
1762 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1766 ret
= config_writer_open_element(writer
,
1767 config_element_channels
);
1769 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1773 cds_list_for_each_entry(kchan
, &session
->kernel_session
->channel_list
.head
,
1775 ret
= save_kernel_channel(writer
, kchan
);
1776 if (ret
!= LTTNG_OK
) {
1782 ret
= config_writer_close_element(writer
);
1784 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1794 const char *get_config_domain_str(enum lttng_domain_type domain
)
1796 const char *str_dom
;
1799 case LTTNG_DOMAIN_KERNEL
:
1800 str_dom
= config_domain_type_kernel
;
1802 case LTTNG_DOMAIN_UST
:
1803 str_dom
= config_domain_type_ust
;
1805 case LTTNG_DOMAIN_JUL
:
1806 str_dom
= config_domain_type_jul
;
1808 case LTTNG_DOMAIN_LOG4J
:
1809 str_dom
= config_domain_type_log4j
;
1811 case LTTNG_DOMAIN_PYTHON
:
1812 str_dom
= config_domain_type_python
;
1821 /* Return LTTNG_OK on success else a LTTNG_ERR* code. */
1822 static int save_process_attr_tracker(struct config_writer
*writer
,
1823 struct ltt_session
*sess
,
1825 enum lttng_process_attr process_attr
)
1828 const char *element_id_tracker
, *element_target_id
, *element_id
;
1829 const struct process_attr_tracker
*tracker
;
1830 enum lttng_tracking_policy tracking_policy
;
1831 struct lttng_process_attr_values
*values
= NULL
;
1833 switch (process_attr
) {
1834 case LTTNG_PROCESS_ATTR_PROCESS_ID
:
1835 element_id_tracker
= config_element_process_attr_tracker_pid
;
1836 element_target_id
= config_element_process_attr_pid_value
;
1837 element_id
= config_element_process_attr_id
;
1839 case LTTNG_PROCESS_ATTR_VIRTUAL_PROCESS_ID
:
1840 element_id_tracker
= config_element_process_attr_tracker_vpid
;
1841 element_target_id
= config_element_process_attr_vpid_value
;
1842 element_id
= config_element_process_attr_id
;
1844 case LTTNG_PROCESS_ATTR_USER_ID
:
1845 element_id_tracker
= config_element_process_attr_tracker_uid
;
1846 element_target_id
= config_element_process_attr_uid_value
;
1847 element_id
= config_element_process_attr_id
;
1849 case LTTNG_PROCESS_ATTR_VIRTUAL_USER_ID
:
1850 element_id_tracker
= config_element_process_attr_tracker_vuid
;
1851 element_target_id
= config_element_process_attr_vuid_value
;
1852 element_id
= config_element_process_attr_id
;
1854 case LTTNG_PROCESS_ATTR_GROUP_ID
:
1855 element_id_tracker
= config_element_process_attr_tracker_gid
;
1856 element_target_id
= config_element_process_attr_gid_value
;
1857 element_id
= config_element_process_attr_id
;
1859 case LTTNG_PROCESS_ATTR_VIRTUAL_GROUP_ID
:
1860 element_id_tracker
= config_element_process_attr_tracker_vgid
;
1861 element_target_id
= config_element_process_attr_vgid_value
;
1862 element_id
= config_element_process_attr_id
;
1865 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1870 case LTTNG_DOMAIN_KERNEL
:
1872 tracker
= kernel_get_process_attr_tracker(
1873 sess
->kernel_session
, process_attr
);
1877 case LTTNG_DOMAIN_UST
:
1879 tracker
= trace_ust_get_process_attr_tracker(
1880 sess
->ust_session
, process_attr
);
1884 case LTTNG_DOMAIN_JUL
:
1885 case LTTNG_DOMAIN_LOG4J
:
1886 case LTTNG_DOMAIN_PYTHON
:
1888 ret
= LTTNG_ERR_UNSUPPORTED_DOMAIN
;
1892 tracking_policy
= process_attr_tracker_get_tracking_policy(tracker
);
1893 if (tracking_policy
== LTTNG_TRACKING_POLICY_INCLUDE_ALL
) {
1894 /* Tracking all, nothing to output. */
1899 ret
= config_writer_open_element(writer
, element_id_tracker
);
1901 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1905 ret
= config_writer_open_element(
1906 writer
, config_element_process_attr_values
);
1908 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1912 if (tracking_policy
== LTTNG_TRACKING_POLICY_INCLUDE_SET
) {
1913 unsigned int i
, count
;
1914 enum process_attr_tracker_status status
=
1915 process_attr_tracker_get_inclusion_set(
1918 if (status
!= PROCESS_ATTR_TRACKER_STATUS_OK
) {
1919 ret
= LTTNG_ERR_NOMEM
;
1923 count
= _lttng_process_attr_values_get_count(values
);
1925 for (i
= 0; i
< count
; i
++) {
1926 unsigned int integral_value
= UINT_MAX
;
1927 const char *name
= NULL
;
1928 const struct process_attr_value
*value
=
1929 lttng_process_attr_tracker_values_get_at_index(
1933 ret
= config_writer_open_element(
1934 writer
, element_target_id
);
1936 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1940 switch (value
->type
) {
1941 case LTTNG_PROCESS_ATTR_VALUE_TYPE_PID
:
1943 (unsigned int) value
->value
.pid
;
1945 case LTTNG_PROCESS_ATTR_VALUE_TYPE_UID
:
1947 (unsigned int) value
->value
.uid
;
1949 case LTTNG_PROCESS_ATTR_VALUE_TYPE_GID
:
1951 (unsigned int) value
->value
.gid
;
1953 case LTTNG_PROCESS_ATTR_VALUE_TYPE_USER_NAME
:
1954 name
= value
->value
.user_name
;
1957 case LTTNG_PROCESS_ATTR_VALUE_TYPE_GROUP_NAME
:
1958 name
= value
->value
.group_name
;
1966 ret
= config_writer_write_element_string(writer
,
1967 config_element_name
, name
);
1969 ret
= config_writer_write_element_unsigned_int(
1975 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1979 /* /$element_target_id */
1980 ret
= config_writer_close_element(writer
);
1982 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1989 ret
= config_writer_close_element(writer
);
1991 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1995 /* /$element_id_tracker */
1996 ret
= config_writer_close_element(writer
);
1998 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2004 lttng_process_attr_values_destroy(values
);
2008 /* Return LTTNG_OK on success else a LTTNG_ERR* code. */
2009 static int save_process_attr_trackers(struct config_writer
*writer
,
2010 struct ltt_session
*sess
,
2016 case LTTNG_DOMAIN_KERNEL
:
2017 ret
= save_process_attr_tracker(writer
, sess
, domain
,
2018 LTTNG_PROCESS_ATTR_PROCESS_ID
);
2019 if (ret
!= LTTNG_OK
) {
2022 ret
= save_process_attr_tracker(writer
, sess
, domain
,
2023 LTTNG_PROCESS_ATTR_VIRTUAL_PROCESS_ID
);
2024 if (ret
!= LTTNG_OK
) {
2027 ret
= save_process_attr_tracker(writer
, sess
, domain
,
2028 LTTNG_PROCESS_ATTR_USER_ID
);
2029 if (ret
!= LTTNG_OK
) {
2032 ret
= save_process_attr_tracker(writer
, sess
, domain
,
2033 LTTNG_PROCESS_ATTR_VIRTUAL_USER_ID
);
2034 if (ret
!= LTTNG_OK
) {
2037 ret
= save_process_attr_tracker(writer
, sess
, domain
,
2038 LTTNG_PROCESS_ATTR_GROUP_ID
);
2039 if (ret
!= LTTNG_OK
) {
2042 ret
= save_process_attr_tracker(writer
, sess
, domain
,
2043 LTTNG_PROCESS_ATTR_VIRTUAL_GROUP_ID
);
2044 if (ret
!= LTTNG_OK
) {
2048 case LTTNG_DOMAIN_UST
:
2049 ret
= save_process_attr_tracker(writer
, sess
, domain
,
2050 LTTNG_PROCESS_ATTR_VIRTUAL_PROCESS_ID
);
2051 if (ret
!= LTTNG_OK
) {
2054 ret
= save_process_attr_tracker(writer
, sess
, domain
,
2055 LTTNG_PROCESS_ATTR_VIRTUAL_USER_ID
);
2056 if (ret
!= LTTNG_OK
) {
2059 ret
= save_process_attr_tracker(writer
, sess
, domain
,
2060 LTTNG_PROCESS_ATTR_VIRTUAL_GROUP_ID
);
2061 if (ret
!= LTTNG_OK
) {
2066 ret
= LTTNG_ERR_INVALID
;
2074 /* Return LTTNG_OK on success else a LTTNG_ERR* code. */
2076 int save_ust_domain(struct config_writer
*writer
,
2077 struct ltt_session
*session
, enum lttng_domain_type domain
)
2080 struct ltt_ust_channel
*ust_chan
;
2081 const char *buffer_type_string
;
2082 struct lttng_ht_node_str
*node
;
2083 struct lttng_ht_iter iter
;
2084 const char *config_domain_name
;
2089 ret
= config_writer_open_element(writer
,
2090 config_element_domain
);
2092 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2096 config_domain_name
= get_config_domain_str(domain
);
2097 if (!config_domain_name
) {
2098 ret
= LTTNG_ERR_INVALID
;
2102 ret
= config_writer_write_element_string(writer
,
2103 config_element_type
, config_domain_name
);
2105 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2109 buffer_type_string
= get_buffer_type_string(
2110 session
->ust_session
->buffer_type
);
2111 if (!buffer_type_string
) {
2112 ERR("Unsupported buffer type.");
2113 ret
= LTTNG_ERR_INVALID
;
2117 ret
= config_writer_write_element_string(writer
,
2118 config_element_buffer_type
, buffer_type_string
);
2120 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2124 ret
= config_writer_open_element(writer
, config_element_channels
);
2126 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2131 cds_lfht_for_each_entry(session
->ust_session
->domain_global
.channels
->ht
,
2132 &iter
.iter
, node
, node
) {
2133 ust_chan
= caa_container_of(node
, struct ltt_ust_channel
, node
);
2134 if (domain
== ust_chan
->domain
) {
2135 ret
= save_ust_channel(writer
, ust_chan
, session
->ust_session
);
2136 if (ret
!= LTTNG_OK
) {
2145 ret
= config_writer_close_element(writer
);
2147 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2151 if (domain
== LTTNG_DOMAIN_UST
) {
2152 ret
= config_writer_open_element(
2153 writer
, config_element_process_attr_trackers
);
2155 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2159 ret
= save_process_attr_trackers(
2160 writer
, session
, LTTNG_DOMAIN_UST
);
2161 if (ret
!= LTTNG_OK
) {
2166 ret
= config_writer_close_element(writer
);
2168 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2174 ret
= config_writer_close_element(writer
);
2176 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2185 /* Return LTTNG_OK on success else a LTTNG_ERR* code. */
2187 int save_domains(struct config_writer
*writer
, struct ltt_session
*session
)
2194 if (!session
->kernel_session
&& !session
->ust_session
) {
2198 ret
= config_writer_open_element(writer
, config_element_domains
);
2200 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2204 if (session
->kernel_session
) {
2205 ret
= config_writer_open_element(writer
,
2206 config_element_domain
);
2208 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2212 ret
= save_kernel_session(writer
, session
);
2213 if (ret
!= LTTNG_OK
) {
2217 ret
= config_writer_open_element(
2218 writer
, config_element_process_attr_trackers
);
2220 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2224 ret
= save_process_attr_trackers(
2225 writer
, session
, LTTNG_DOMAIN_KERNEL
);
2226 if (ret
!= LTTNG_OK
) {
2231 ret
= config_writer_close_element(writer
);
2233 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2237 ret
= config_writer_close_element(writer
);
2239 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2244 if (session
->ust_session
) {
2245 ret
= save_ust_domain(writer
, session
, LTTNG_DOMAIN_UST
);
2246 if (ret
!= LTTNG_OK
) {
2250 ret
= save_ust_domain(writer
, session
, LTTNG_DOMAIN_JUL
);
2251 if (ret
!= LTTNG_OK
) {
2255 ret
= save_ust_domain(writer
, session
, LTTNG_DOMAIN_LOG4J
);
2256 if (ret
!= LTTNG_OK
) {
2260 ret
= save_ust_domain(writer
, session
, LTTNG_DOMAIN_PYTHON
);
2261 if (ret
!= LTTNG_OK
) {
2267 ret
= config_writer_close_element(writer
);
2269 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2278 /* Return LTTNG_OK on success else a LTTNG_ERR* code. */
2280 int save_consumer_output(struct config_writer
*writer
,
2281 struct consumer_output
*output
)
2288 ret
= config_writer_open_element(writer
, config_element_consumer_output
);
2290 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2294 ret
= config_writer_write_element_bool(writer
, config_element_enabled
,
2297 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2301 ret
= config_writer_open_element(writer
, config_element_destination
);
2303 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2307 switch (output
->type
) {
2308 case CONSUMER_DST_LOCAL
:
2309 ret
= config_writer_write_element_string(writer
,
2310 config_element_path
, output
->dst
.session_root_path
);
2312 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2316 case CONSUMER_DST_NET
:
2320 uri
= zmalloc(PATH_MAX
);
2322 ret
= LTTNG_ERR_NOMEM
;
2326 ret
= config_writer_open_element(writer
, config_element_net_output
);
2328 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2329 goto end_net_output
;
2332 if (output
->dst
.net
.control_isset
&&
2333 output
->dst
.net
.data_isset
) {
2334 ret
= uri_to_str_url(&output
->dst
.net
.control
, uri
, PATH_MAX
);
2336 ret
= LTTNG_ERR_INVALID
;
2337 goto end_net_output
;
2340 ret
= config_writer_write_element_string(writer
,
2341 config_element_control_uri
, uri
);
2343 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2344 goto end_net_output
;
2347 ret
= uri_to_str_url(&output
->dst
.net
.data
, uri
, PATH_MAX
);
2349 ret
= LTTNG_ERR_INVALID
;
2350 goto end_net_output
;
2353 ret
= config_writer_write_element_string(writer
,
2354 config_element_data_uri
, uri
);
2356 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2357 goto end_net_output
;
2362 if (ret
!= LTTNG_OK
) {
2366 ret
= !output
->dst
.net
.control_isset
?
2367 LTTNG_ERR_URL_CTRL_MISS
:
2368 LTTNG_ERR_URL_DATA_MISS
;
2373 ret
= config_writer_close_element(writer
);
2375 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2381 ERR("Unsupported consumer output type.");
2382 ret
= LTTNG_ERR_INVALID
;
2387 ret
= config_writer_close_element(writer
);
2389 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2393 /* /consumer_output */
2394 ret
= config_writer_close_element(writer
);
2396 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2405 /* Return LTTNG_OK on success else a LTTNG_ERR* code. */
2407 int save_snapshot_outputs(struct config_writer
*writer
,
2408 struct snapshot
*snapshot
)
2411 struct lttng_ht_iter iter
;
2412 struct snapshot_output
*output
;
2417 ret
= config_writer_open_element(writer
, config_element_snapshot_outputs
);
2419 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2424 cds_lfht_for_each_entry(snapshot
->output_ht
->ht
, &iter
.iter
, output
,
2426 ret
= config_writer_open_element(writer
,
2427 config_element_output
);
2429 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2433 ret
= config_writer_write_element_string(writer
,
2434 config_element_name
, output
->name
);
2436 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2440 ret
= config_writer_write_element_unsigned_int(writer
,
2441 config_element_max_size
, output
->max_size
);
2443 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2447 ret
= save_consumer_output(writer
, output
->consumer
);
2448 if (ret
!= LTTNG_OK
) {
2453 ret
= config_writer_close_element(writer
);
2455 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2461 /* /snapshot_outputs */
2462 ret
= config_writer_close_element(writer
);
2464 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2476 /* Return LTTNG_OK on success else a LTTNG_ERR* code. */
2478 int save_session_output(struct config_writer
*writer
,
2479 struct ltt_session
*session
)
2486 if ((session
->snapshot_mode
&& session
->snapshot
.nb_output
== 0) ||
2487 (!session
->snapshot_mode
&& !session
->consumer
)) {
2488 /* Session is in no output mode */
2493 ret
= config_writer_open_element(writer
, config_element_output
);
2495 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2499 if (session
->snapshot_mode
) {
2500 ret
= save_snapshot_outputs(writer
, &session
->snapshot
);
2501 if (ret
!= LTTNG_OK
) {
2505 if (session
->consumer
) {
2506 ret
= save_consumer_output(writer
, session
->consumer
);
2507 if (ret
!= LTTNG_OK
) {
2514 ret
= config_writer_close_element(writer
);
2516 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2525 int save_session_rotation_schedule(struct config_writer
*writer
,
2526 enum lttng_rotation_schedule_type type
, uint64_t value
)
2529 const char *element_name
;
2530 const char *value_name
;
2533 case LTTNG_ROTATION_SCHEDULE_TYPE_PERIODIC
:
2534 element_name
= config_element_rotation_schedule_periodic
;
2535 value_name
= config_element_rotation_schedule_periodic_time_us
;
2537 case LTTNG_ROTATION_SCHEDULE_TYPE_SIZE_THRESHOLD
:
2538 element_name
= config_element_rotation_schedule_size_threshold
;
2539 value_name
= config_element_rotation_schedule_size_threshold_bytes
;
2546 ret
= config_writer_open_element(writer
, element_name
);
2551 ret
= config_writer_write_element_unsigned_int(writer
,
2557 /* Close schedule descriptor element. */
2558 ret
= config_writer_close_element(writer
);
2567 int save_session_rotation_schedules(struct config_writer
*writer
,
2568 struct ltt_session
*session
)
2572 ret
= config_writer_open_element(writer
,
2573 config_element_rotation_schedules
);
2577 if (session
->rotate_timer_period
) {
2578 ret
= save_session_rotation_schedule(writer
,
2579 LTTNG_ROTATION_SCHEDULE_TYPE_PERIODIC
,
2580 session
->rotate_timer_period
);
2582 goto close_schedules
;
2585 if (session
->rotate_size
) {
2586 ret
= save_session_rotation_schedule(writer
,
2587 LTTNG_ROTATION_SCHEDULE_TYPE_SIZE_THRESHOLD
,
2588 session
->rotate_size
);
2590 goto close_schedules
;
2595 /* Close rotation schedules element. */
2596 ret
= config_writer_close_element(writer
);
2605 * Save the given session.
2607 * Return LTTNG_OK on success else a LTTNG_ERR* code.
2610 int save_session(struct ltt_session
*session
,
2611 struct lttng_save_session_attr
*attr
, lttng_sock_cred
*creds
)
2614 char config_file_path
[LTTNG_PATH_MAX
];
2616 struct config_writer
*writer
= NULL
;
2617 size_t session_name_len
;
2618 const char *provided_path
;
2619 int file_open_flags
= O_CREAT
| O_WRONLY
| O_TRUNC
;
2625 session_name_len
= strlen(session
->name
);
2626 memset(config_file_path
, 0, sizeof(config_file_path
));
2628 if (!session_access_ok(session
,
2629 LTTNG_SOCK_GET_UID_CRED(creds
),
2630 LTTNG_SOCK_GET_GID_CRED(creds
)) || session
->destroyed
) {
2631 ret
= LTTNG_ERR_EPERM
;
2635 provided_path
= lttng_save_session_attr_get_output_url(attr
);
2636 if (provided_path
) {
2637 DBG3("Save session in provided path %s", provided_path
);
2638 len
= strlen(provided_path
);
2639 if (len
>= sizeof(config_file_path
)) {
2640 ret
= LTTNG_ERR_SET_URL
;
2643 strncpy(config_file_path
, provided_path
, sizeof(config_file_path
));
2646 char *home_dir
= utils_get_user_home_dir(
2647 LTTNG_SOCK_GET_UID_CRED(creds
));
2649 ret
= LTTNG_ERR_SET_URL
;
2653 ret_len
= snprintf(config_file_path
, sizeof(config_file_path
),
2654 DEFAULT_SESSION_HOME_CONFIGPATH
, home_dir
);
2657 PERROR("snprintf save session");
2658 ret
= LTTNG_ERR_SET_URL
;
2665 * Check the path fits in the config file path dst including the '/'
2666 * followed by trailing .lttng extension and the NULL terminated string.
2668 if ((len
+ session_name_len
+ 2 +
2669 sizeof(DEFAULT_SESSION_CONFIG_FILE_EXTENSION
))
2670 > sizeof(config_file_path
)) {
2671 ret
= LTTNG_ERR_SET_URL
;
2675 ret
= run_as_mkdir_recursive(config_file_path
, S_IRWXU
| S_IRWXG
,
2676 LTTNG_SOCK_GET_UID_CRED(creds
), LTTNG_SOCK_GET_GID_CRED(creds
));
2678 ret
= LTTNG_ERR_SET_URL
;
2683 * At this point, we know that everything fits in the buffer. Validation
2684 * was done just above.
2686 config_file_path
[len
++] = '/';
2687 strncpy(config_file_path
+ len
, session
->name
, sizeof(config_file_path
) - len
);
2688 len
+= session_name_len
;
2689 strcpy(config_file_path
+ len
, DEFAULT_SESSION_CONFIG_FILE_EXTENSION
);
2690 len
+= sizeof(DEFAULT_SESSION_CONFIG_FILE_EXTENSION
);
2691 config_file_path
[len
] = '\0';
2693 if (!attr
->overwrite
) {
2694 file_open_flags
|= O_EXCL
;
2697 fd
= run_as_open(config_file_path
, file_open_flags
,
2698 S_IRUSR
| S_IWUSR
| S_IRGRP
| S_IWGRP
,
2699 LTTNG_SOCK_GET_UID_CRED(creds
), LTTNG_SOCK_GET_GID_CRED(creds
));
2701 PERROR("Could not create configuration file");
2704 ret
= LTTNG_ERR_SAVE_FILE_EXIST
;
2707 ret
= LTTNG_ERR_EPERM
;
2710 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2716 writer
= config_writer_create(fd
, 1);
2718 ret
= LTTNG_ERR_NOMEM
;
2722 ret
= config_writer_open_element(writer
, config_element_sessions
);
2724 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2728 ret
= config_writer_open_element(writer
, config_element_session
);
2730 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2734 ret
= config_writer_write_element_string(writer
, config_element_name
,
2737 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2741 if (session
->shm_path
[0] != '\0') {
2742 ret
= config_writer_write_element_string(writer
,
2743 config_element_shared_memory_path
,
2746 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2751 ret
= save_domains(writer
, session
);
2752 if (ret
!= LTTNG_OK
) {
2756 ret
= config_writer_write_element_bool(writer
, config_element_started
,
2759 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2763 if (session
->snapshot_mode
|| session
->live_timer
||
2764 session
->rotate_timer_period
|| session
->rotate_size
) {
2765 ret
= config_writer_open_element(writer
, config_element_attributes
);
2767 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2771 if (session
->snapshot_mode
) {
2772 ret
= config_writer_write_element_bool(writer
,
2773 config_element_snapshot_mode
, 1);
2775 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2778 } else if (session
->live_timer
) {
2779 ret
= config_writer_write_element_unsigned_int(writer
,
2780 config_element_live_timer_interval
, session
->live_timer
);
2782 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2786 if (session
->rotate_timer_period
|| session
->rotate_size
) {
2787 ret
= save_session_rotation_schedules(writer
,
2790 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2796 ret
= config_writer_close_element(writer
);
2798 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2803 ret
= save_session_output(writer
, session
);
2804 if (ret
!= LTTNG_OK
) {
2809 ret
= config_writer_close_element(writer
);
2811 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2816 ret
= config_writer_close_element(writer
);
2818 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2824 if (writer
&& config_writer_destroy(writer
)) {
2825 /* Preserve the original error code */
2826 ret
= ret
!= LTTNG_OK
? ret
: LTTNG_ERR_SAVE_IO_FAIL
;
2828 if (ret
!= LTTNG_OK
) {
2829 /* Delete file in case of error */
2830 if ((fd
>= 0) && unlink(config_file_path
)) {
2831 PERROR("Unlinking XML session configuration.");
2838 closeret
= close(fd
);
2840 PERROR("Closing XML session configuration");
2847 int cmd_save_sessions(struct lttng_save_session_attr
*attr
,
2848 lttng_sock_cred
*creds
)
2851 const char *session_name
;
2852 struct ltt_session
*session
;
2854 session_lock_list();
2856 session_name
= lttng_save_session_attr_get_session_name(attr
);
2858 session
= session_find_by_name(session_name
);
2860 ret
= LTTNG_ERR_SESS_NOT_FOUND
;
2864 session_lock(session
);
2865 ret
= save_session(session
, attr
, creds
);
2866 session_unlock(session
);
2867 session_put(session
);
2868 if (ret
!= LTTNG_OK
) {
2872 struct ltt_session_list
*list
= session_get_list();
2874 cds_list_for_each_entry(session
, &list
->head
, list
) {
2875 if (!session_get(session
)) {
2878 session_lock(session
);
2879 ret
= save_session(session
, attr
, creds
);
2880 session_unlock(session
);
2881 session_put(session
);
2882 /* Don't abort if we don't have the required permissions. */
2883 if (ret
!= LTTNG_OK
&& ret
!= LTTNG_ERR_EPERM
) {
2891 session_unlock_list();