2 * Copyright (C) 2014 - Jérémie Galarneau <jeremie.galarneau@efficios.com>
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License, version 2 only, as
6 * published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * You should have received a copy of the GNU General Public License along with
14 * this program; if not, write to the Free Software Foundation, Inc., 51
15 * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
22 #include <urcu/uatomic.h>
25 #include <common/defaults.h>
26 #include <common/error.h>
27 #include <common/config/session-config.h>
28 #include <common/utils.h>
29 #include <common/runas.h>
30 #include <lttng/save-internal.h>
35 #include "lttng-syscall.h"
36 #include "trace-ust.h"
40 int save_kernel_channel_attributes(struct config_writer
*writer
,
41 struct lttng_channel_attr
*attr
)
45 ret
= config_writer_write_element_string(writer
,
46 config_element_overwrite_mode
,
47 attr
->overwrite
? config_overwrite_mode_overwrite
:
48 config_overwrite_mode_discard
);
53 ret
= config_writer_write_element_unsigned_int(writer
,
54 config_element_subbuf_size
, attr
->subbuf_size
);
59 ret
= config_writer_write_element_unsigned_int(writer
,
60 config_element_num_subbuf
,
66 ret
= config_writer_write_element_unsigned_int(writer
,
67 config_element_switch_timer_interval
,
68 attr
->switch_timer_interval
);
73 ret
= config_writer_write_element_unsigned_int(writer
,
74 config_element_read_timer_interval
,
75 attr
->read_timer_interval
);
80 ret
= config_writer_write_element_string(writer
,
81 config_element_output_type
,
82 attr
->output
== LTTNG_EVENT_SPLICE
?
83 config_output_type_splice
: config_output_type_mmap
);
88 ret
= config_writer_write_element_unsigned_int(writer
,
89 config_element_tracefile_size
, attr
->tracefile_size
);
94 ret
= config_writer_write_element_unsigned_int(writer
,
95 config_element_tracefile_count
,
96 attr
->tracefile_count
);
101 ret
= config_writer_write_element_unsigned_int(writer
,
102 config_element_live_timer_interval
,
103 attr
->live_timer_interval
);
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
);
119 ret
= config_writer_write_element_signed_int(writer
,
120 config_element_blocking_timeout
,
121 ext
->blocking_timeout
);
128 return ret
? LTTNG_ERR_SAVE_IO_FAIL
: 0;
132 int save_ust_channel_attributes(struct config_writer
*writer
,
133 struct lttng_ust_channel_attr
*attr
)
136 struct ltt_ust_channel
*channel
= NULL
;
138 ret
= config_writer_write_element_string(writer
,
139 config_element_overwrite_mode
,
140 attr
->overwrite
? config_overwrite_mode_overwrite
:
141 config_overwrite_mode_discard
);
146 ret
= config_writer_write_element_unsigned_int(writer
,
147 config_element_subbuf_size
, attr
->subbuf_size
);
152 ret
= config_writer_write_element_unsigned_int(writer
,
153 config_element_num_subbuf
,
159 ret
= config_writer_write_element_unsigned_int(writer
,
160 config_element_switch_timer_interval
,
161 attr
->switch_timer_interval
);
166 ret
= config_writer_write_element_unsigned_int(writer
,
167 config_element_read_timer_interval
,
168 attr
->read_timer_interval
);
173 ret
= config_writer_write_element_string(writer
,
174 config_element_output_type
,
175 attr
->output
== LTTNG_UST_MMAP
?
176 config_output_type_mmap
: config_output_type_splice
);
181 ret
= config_writer_write_element_signed_int(writer
,
182 config_element_blocking_timeout
,
183 attr
->u
.s
.blocking_timeout
);
189 * Fetch the monitor timer which is located in the parent of
190 * lttng_ust_channel_attr
192 channel
= caa_container_of(attr
, struct ltt_ust_channel
, attr
);
193 ret
= config_writer_write_element_unsigned_int(writer
,
194 config_element_monitor_timer_interval
,
195 channel
->monitor_timer_interval
);
201 return ret
? LTTNG_ERR_SAVE_IO_FAIL
: 0;
205 const char *get_kernel_instrumentation_string(
206 enum lttng_kernel_instrumentation instrumentation
)
208 const char *instrumentation_string
;
210 switch (instrumentation
) {
211 case LTTNG_KERNEL_ALL
:
212 instrumentation_string
= config_event_type_all
;
214 case LTTNG_KERNEL_TRACEPOINT
:
215 instrumentation_string
= config_event_type_tracepoint
;
217 case LTTNG_KERNEL_KPROBE
:
218 instrumentation_string
= config_event_type_probe
;
220 case LTTNG_KERNEL_UPROBE
:
221 instrumentation_string
= config_event_type_userspace_probe
;
223 case LTTNG_KERNEL_FUNCTION
:
224 instrumentation_string
= config_event_type_function_entry
;
226 case LTTNG_KERNEL_KRETPROBE
:
227 instrumentation_string
= config_event_type_function
;
229 case LTTNG_KERNEL_NOOP
:
230 instrumentation_string
= config_event_type_noop
;
232 case LTTNG_KERNEL_SYSCALL
:
233 instrumentation_string
= config_event_type_syscall
;
236 instrumentation_string
= NULL
;
239 return instrumentation_string
;
243 const char *get_kernel_context_type_string(
244 enum lttng_kernel_context_type context_type
)
246 const char *context_type_string
;
248 switch (context_type
) {
249 case LTTNG_KERNEL_CONTEXT_PID
:
250 context_type_string
= config_event_context_pid
;
252 case LTTNG_KERNEL_CONTEXT_PROCNAME
:
253 context_type_string
= config_event_context_procname
;
255 case LTTNG_KERNEL_CONTEXT_PRIO
:
256 context_type_string
= config_event_context_prio
;
258 case LTTNG_KERNEL_CONTEXT_NICE
:
259 context_type_string
= config_event_context_nice
;
261 case LTTNG_KERNEL_CONTEXT_VPID
:
262 context_type_string
= config_event_context_vpid
;
264 case LTTNG_KERNEL_CONTEXT_TID
:
265 context_type_string
= config_event_context_tid
;
267 case LTTNG_KERNEL_CONTEXT_VTID
:
268 context_type_string
= config_event_context_vtid
;
270 case LTTNG_KERNEL_CONTEXT_PPID
:
271 context_type_string
= config_event_context_ppid
;
273 case LTTNG_KERNEL_CONTEXT_VPPID
:
274 context_type_string
= config_event_context_vppid
;
276 case LTTNG_KERNEL_CONTEXT_HOSTNAME
:
277 context_type_string
= config_event_context_hostname
;
279 case LTTNG_KERNEL_CONTEXT_INTERRUPTIBLE
:
280 context_type_string
= config_event_context_interruptible
;
282 case LTTNG_KERNEL_CONTEXT_PREEMPTIBLE
:
283 context_type_string
= config_event_context_preemptible
;
285 case LTTNG_KERNEL_CONTEXT_NEED_RESCHEDULE
:
286 context_type_string
= config_event_context_need_reschedule
;
288 case LTTNG_KERNEL_CONTEXT_MIGRATABLE
:
289 context_type_string
= config_event_context_migratable
;
291 case LTTNG_KERNEL_CONTEXT_CALLSTACK_USER
:
292 context_type_string
= config_event_context_callstack_user
;
294 case LTTNG_KERNEL_CONTEXT_CALLSTACK_KERNEL
:
295 context_type_string
= config_event_context_callstack_kernel
;
297 case LTTNG_KERNEL_CONTEXT_CGROUP_NS
:
298 context_type_string
= config_event_context_cgroup_ns
;
300 case LTTNG_KERNEL_CONTEXT_IPC_NS
:
301 context_type_string
= config_event_context_ipc_ns
;
303 case LTTNG_KERNEL_CONTEXT_MNT_NS
:
304 context_type_string
= config_event_context_mnt_ns
;
306 case LTTNG_KERNEL_CONTEXT_NET_NS
:
307 context_type_string
= config_event_context_net_ns
;
309 case LTTNG_KERNEL_CONTEXT_PID_NS
:
310 context_type_string
= config_event_context_pid_ns
;
312 case LTTNG_KERNEL_CONTEXT_USER_NS
:
313 context_type_string
= config_event_context_user_ns
;
315 case LTTNG_KERNEL_CONTEXT_UTS_NS
:
316 context_type_string
= config_event_context_uts_ns
;
319 context_type_string
= NULL
;
322 return context_type_string
;
326 const char *get_ust_context_type_string(
327 enum lttng_ust_context_type context_type
)
329 const char *context_type_string
;
331 switch (context_type
) {
332 case LTTNG_UST_CONTEXT_PROCNAME
:
333 context_type_string
= config_event_context_procname
;
335 case LTTNG_UST_CONTEXT_VPID
:
336 context_type_string
= config_event_context_vpid
;
338 case LTTNG_UST_CONTEXT_VTID
:
339 context_type_string
= config_event_context_vtid
;
341 case LTTNG_UST_CONTEXT_IP
:
342 context_type_string
= config_event_context_ip
;
344 case LTTNG_UST_CONTEXT_PTHREAD_ID
:
345 context_type_string
= config_event_context_pthread_id
;
347 case LTTNG_UST_CONTEXT_APP_CONTEXT
:
348 context_type_string
= config_event_context_app
;
350 case LTTNG_UST_CONTEXT_PERF_THREAD_COUNTER
:
352 * Error, should not be stored in the XML, perf contexts
353 * are stored as a node of type event_perf_context_type.
356 context_type_string
= NULL
;
360 return context_type_string
;
364 const char *get_buffer_type_string(
365 enum lttng_buffer_type buffer_type
)
367 const char *buffer_type_string
;
369 switch (buffer_type
) {
370 case LTTNG_BUFFER_PER_PID
:
371 buffer_type_string
= config_buffer_type_per_pid
;
373 case LTTNG_BUFFER_PER_UID
:
374 buffer_type_string
= config_buffer_type_per_uid
;
376 case LTTNG_BUFFER_GLOBAL
:
377 buffer_type_string
= config_buffer_type_global
;
380 buffer_type_string
= NULL
;
383 return buffer_type_string
;
387 const char *get_loglevel_type_string(
388 enum lttng_ust_loglevel_type loglevel_type
)
390 const char *loglevel_type_string
;
392 switch (loglevel_type
) {
393 case LTTNG_UST_LOGLEVEL_ALL
:
394 loglevel_type_string
= config_loglevel_type_all
;
396 case LTTNG_UST_LOGLEVEL_RANGE
:
397 loglevel_type_string
= config_loglevel_type_range
;
399 case LTTNG_UST_LOGLEVEL_SINGLE
:
400 loglevel_type_string
= config_loglevel_type_single
;
403 loglevel_type_string
= NULL
;
406 return loglevel_type_string
;
410 int save_kernel_function_event(struct config_writer
*writer
,
411 struct ltt_kernel_event
*event
)
415 ret
= config_writer_open_element(writer
, config_element_function_attributes
);
417 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
421 ret
= config_writer_write_element_string(writer
, config_element_name
,
422 event
->event
->u
.ftrace
.symbol_name
);
424 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
428 /* /function attributes */
429 ret
= config_writer_close_element(writer
);
431 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
439 int save_kernel_kprobe_event(struct config_writer
*writer
,
440 struct ltt_kernel_event
*event
)
443 const char *symbol_name
;
447 switch (event
->event
->instrumentation
) {
448 case LTTNG_KERNEL_KPROBE
:
450 * Comments in lttng-kernel.h mention that
451 * either addr or symbol_name are set, not both.
453 addr
= event
->event
->u
.kprobe
.addr
;
454 offset
= event
->event
->u
.kprobe
.offset
;
455 symbol_name
= addr
? NULL
: event
->event
->u
.kprobe
.symbol_name
;
457 case LTTNG_KERNEL_KRETPROBE
:
458 addr
= event
->event
->u
.kretprobe
.addr
;
459 offset
= event
->event
->u
.kretprobe
.offset
;
460 symbol_name
= addr
? NULL
: event
->event
->u
.kretprobe
.symbol_name
;
464 ERR("Unsupported kernel instrumentation type.");
465 ret
= LTTNG_ERR_INVALID
;
469 ret
= config_writer_open_element(writer
, config_element_probe_attributes
);
471 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
476 ret
= config_writer_write_element_unsigned_int( writer
,
477 config_element_address
, addr
);
479 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
482 } else if (symbol_name
) {
483 ret
= config_writer_write_element_string(writer
,
484 config_element_symbol_name
, symbol_name
);
486 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
489 /* If the offset is non-zero, write it.*/
491 ret
= config_writer_write_element_unsigned_int(writer
,
492 config_element_offset
, offset
);
494 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
500 * This really should not happen as we are either setting the
501 * address or the symbol above.
503 ERR("Invalid probe/function description.");
504 ret
= LTTNG_ERR_INVALID
;
509 ret
= config_writer_close_element(writer
);
511 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
519 * Save the userspace probe tracepoint event associated with the event to the
523 int save_kernel_userspace_probe_tracepoint_event(struct config_writer
*writer
,
524 struct ltt_kernel_event
*event
)
527 const char *probe_name
, *provider_name
, *binary_path
;
528 const struct lttng_userspace_probe_location
*userspace_probe_location
;
529 const struct lttng_userspace_probe_location_lookup_method
*lookup_method
;
530 enum lttng_userspace_probe_location_lookup_method_type lookup_type
;
532 /* Get userspace probe location from the event. */
533 userspace_probe_location
= event
->userspace_probe_location
;
534 if (!userspace_probe_location
) {
535 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
539 /* Get lookup method and lookup method type. */
540 lookup_method
= lttng_userspace_probe_location_get_lookup_method(userspace_probe_location
);
541 if (!lookup_method
) {
542 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
546 lookup_type
= lttng_userspace_probe_location_lookup_method_get_type(lookup_method
);
548 /* Get the binary path, probe name and provider name. */
550 lttng_userspace_probe_location_tracepoint_get_binary_path(
551 userspace_probe_location
);
553 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
558 lttng_userspace_probe_location_tracepoint_get_probe_name(
559 userspace_probe_location
);
561 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
566 lttng_userspace_probe_location_tracepoint_get_provider_name(
567 userspace_probe_location
);
568 if (!provider_name
) {
569 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
573 /* Open a userspace probe tracepoint attribute. */
574 ret
= config_writer_open_element(writer
, config_element_userspace_probe_tracepoint_attributes
);
576 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
580 switch (lookup_type
) {
581 case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT
:
582 ret
= config_writer_write_element_string(writer
,
583 config_element_userspace_probe_lookup
,
584 config_element_userspace_probe_lookup_tracepoint_sdt
);
586 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
591 ERR("Unsupported kernel userspace probe tracepoint lookup method.");
592 ret
= LTTNG_ERR_INVALID
;
596 /* Write the binary path, provider name and the probe name. */
597 ret
= config_writer_write_element_string(writer
,
598 config_element_userspace_probe_location_binary_path
,
601 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
605 ret
= config_writer_write_element_string(writer
,
606 config_element_userspace_probe_tracepoint_location_provider_name
,
609 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
613 ret
= config_writer_write_element_string(writer
,
614 config_element_userspace_probe_tracepoint_location_probe_name
,
617 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
621 /* Close the userspace probe tracepoint attribute. */
622 ret
= config_writer_close_element(writer
);
624 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
633 * Save the userspace probe function event associated with the event to the
637 int save_kernel_userspace_probe_function_event(struct config_writer
*writer
,
638 struct ltt_kernel_event
*event
)
641 const char *function_name
, *binary_path
;
642 const struct lttng_userspace_probe_location
*userspace_probe_location
;
643 const struct lttng_userspace_probe_location_lookup_method
*lookup_method
;
644 enum lttng_userspace_probe_location_lookup_method_type lookup_type
;
646 /* Get userspace probe location from the event. */
647 userspace_probe_location
= event
->userspace_probe_location
;
648 if (!userspace_probe_location
) {
649 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
653 /* Get lookup method and lookup method type. */
654 lookup_method
= lttng_userspace_probe_location_get_lookup_method(
655 userspace_probe_location
);
656 if (!lookup_method
) {
657 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
661 /* Get the binary path and the function name. */
663 lttng_userspace_probe_location_function_get_binary_path(
664 userspace_probe_location
);
666 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
671 lttng_userspace_probe_location_function_get_function_name(
672 userspace_probe_location
);
673 if (!function_name
) {
674 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
678 /* Open a userspace probe function attribute. */
679 ret
= config_writer_open_element(writer
,
680 config_element_userspace_probe_function_attributes
);
682 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
686 lookup_type
= lttng_userspace_probe_location_lookup_method_get_type(lookup_method
);
687 switch (lookup_type
) {
688 case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF
:
689 ret
= config_writer_write_element_string(writer
,
690 config_element_userspace_probe_lookup
,
691 config_element_userspace_probe_lookup_function_elf
);
693 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
697 case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_DEFAULT
:
698 ret
= config_writer_write_element_string(writer
,
699 config_element_userspace_probe_lookup
,
700 config_element_userspace_probe_lookup_function_default
);
702 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
707 ERR("Unsupported kernel userspace probe function lookup method.");
708 ret
= LTTNG_ERR_INVALID
;
712 /* Write the binary path and the function name. */
713 ret
= config_writer_write_element_string(writer
,
714 config_element_userspace_probe_location_binary_path
,
717 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
721 ret
= config_writer_write_element_string(writer
,
722 config_element_userspace_probe_function_location_function_name
,
725 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
729 /* Close the userspace probe function attribute. */
730 ret
= config_writer_close_element(writer
);
732 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
741 int save_kernel_userspace_probe_event(struct config_writer
*writer
,
742 struct ltt_kernel_event
*event
)
745 struct lttng_userspace_probe_location
*userspace_probe_location
;
747 /* Get userspace probe location from the event. */
748 userspace_probe_location
= event
->userspace_probe_location
;
749 if (!userspace_probe_location
) {
750 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
754 switch(lttng_userspace_probe_location_get_type(userspace_probe_location
)) {
755 case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION
:
757 ret
= save_kernel_userspace_probe_function_event(writer
, event
);
759 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
764 case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT
:
766 ret
= save_kernel_userspace_probe_tracepoint_event(writer
, event
);
768 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
773 case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_UNKNOWN
:
775 ERR("Unsupported kernel userspace probe location type.");
776 ret
= LTTNG_ERR_INVALID
;
785 int save_kernel_event(struct config_writer
*writer
,
786 struct ltt_kernel_event
*event
)
789 const char *instrumentation_type
;
791 ret
= config_writer_open_element(writer
, config_element_event
);
793 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
797 if (event
->event
->name
[0]) {
798 ret
= config_writer_write_element_string(writer
,
799 config_element_name
, event
->event
->name
);
801 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
806 ret
= config_writer_write_element_bool(writer
, config_element_enabled
,
809 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
813 instrumentation_type
= get_kernel_instrumentation_string(
814 event
->event
->instrumentation
);
815 if (!instrumentation_type
) {
816 ret
= LTTNG_ERR_INVALID
;
820 ret
= config_writer_write_element_string(writer
, config_element_type
,
821 instrumentation_type
);
823 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
827 if (event
->filter_expression
) {
828 ret
= config_writer_write_element_string(writer
,
829 config_element_filter
,
830 event
->filter_expression
);
832 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
837 if (event
->event
->instrumentation
== LTTNG_KERNEL_FUNCTION
||
838 event
->event
->instrumentation
== LTTNG_KERNEL_KPROBE
||
839 event
->event
->instrumentation
== LTTNG_KERNEL_UPROBE
||
840 event
->event
->instrumentation
== LTTNG_KERNEL_KRETPROBE
) {
842 ret
= config_writer_open_element(writer
,
843 config_element_attributes
);
845 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
849 switch (event
->event
->instrumentation
) {
850 case LTTNG_KERNEL_SYSCALL
:
851 case LTTNG_KERNEL_FUNCTION
:
852 ret
= save_kernel_function_event(writer
, event
);
857 case LTTNG_KERNEL_KPROBE
:
858 case LTTNG_KERNEL_KRETPROBE
:
859 ret
= save_kernel_kprobe_event(writer
, event
);
864 case LTTNG_KERNEL_UPROBE
:
865 ret
= save_kernel_userspace_probe_event(writer
, event
);
871 ERR("Unsupported kernel instrumentation type.");
872 ret
= LTTNG_ERR_INVALID
;
877 ret
= config_writer_close_element(writer
);
879 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
885 ret
= config_writer_close_element(writer
);
887 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
895 int save_kernel_events(struct config_writer
*writer
,
896 struct ltt_kernel_channel
*kchan
)
899 struct ltt_kernel_event
*event
;
901 ret
= config_writer_open_element(writer
, config_element_events
);
903 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
907 cds_list_for_each_entry(event
, &kchan
->events_list
.head
, list
) {
908 ret
= save_kernel_event(writer
, event
);
915 ret
= config_writer_close_element(writer
);
917 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
925 int save_ust_event(struct config_writer
*writer
,
926 struct ltt_ust_event
*event
)
929 const char *loglevel_type_string
;
931 ret
= config_writer_open_element(writer
, config_element_event
);
933 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
937 if (event
->attr
.name
[0]) {
938 ret
= config_writer_write_element_string(writer
,
939 config_element_name
, event
->attr
.name
);
941 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
946 ret
= config_writer_write_element_bool(writer
, config_element_enabled
,
949 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
953 if (event
->attr
.instrumentation
!= LTTNG_UST_TRACEPOINT
) {
954 ERR("Unsupported UST instrumentation type.");
955 ret
= LTTNG_ERR_INVALID
;
958 ret
= config_writer_write_element_string(writer
, config_element_type
,
959 config_event_type_tracepoint
);
961 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
965 loglevel_type_string
= get_loglevel_type_string(
966 event
->attr
.loglevel_type
);
967 if (!loglevel_type_string
) {
968 ERR("Unsupported UST loglevel type.");
969 ret
= LTTNG_ERR_INVALID
;
973 ret
= config_writer_write_element_string(writer
,
974 config_element_loglevel_type
, loglevel_type_string
);
976 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
980 /* The log level is irrelevant if no "filtering" is enabled */
981 if (event
->attr
.loglevel_type
!= LTTNG_UST_LOGLEVEL_ALL
) {
982 ret
= config_writer_write_element_signed_int(writer
,
983 config_element_loglevel
, event
->attr
.loglevel
);
985 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
990 if (event
->filter_expression
) {
991 ret
= config_writer_write_element_string(writer
,
992 config_element_filter
, event
->filter_expression
);
994 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
999 if (event
->exclusion
&& event
->exclusion
->count
) {
1002 ret
= config_writer_open_element(writer
,
1003 config_element_exclusions
);
1005 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1009 for (i
= 0; i
< event
->exclusion
->count
; i
++) {
1010 ret
= config_writer_write_element_string(writer
,
1011 config_element_exclusion
,
1012 LTTNG_EVENT_EXCLUSION_NAME_AT(
1013 event
->exclusion
, i
));
1015 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1021 ret
= config_writer_close_element(writer
);
1023 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1029 ret
= config_writer_close_element(writer
);
1031 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1039 int save_ust_events(struct config_writer
*writer
,
1040 struct lttng_ht
*events
)
1043 struct ltt_ust_event
*event
;
1044 struct lttng_ht_node_str
*node
;
1045 struct lttng_ht_iter iter
;
1047 ret
= config_writer_open_element(writer
, config_element_events
);
1049 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1054 cds_lfht_for_each_entry(events
->ht
, &iter
.iter
, node
, node
) {
1055 event
= caa_container_of(node
, struct ltt_ust_event
, node
);
1057 if (event
->internal
) {
1058 /* Internal events must not be exposed to clients */
1061 ret
= save_ust_event(writer
, event
);
1070 ret
= config_writer_close_element(writer
);
1072 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1080 int init_ust_event_from_agent_event(struct ltt_ust_event
*ust_event
,
1081 struct agent_event
*agent_event
)
1084 enum lttng_ust_loglevel_type ust_loglevel_type
;
1086 ust_event
->enabled
= agent_event
->enabled
;
1087 ust_event
->attr
.instrumentation
= LTTNG_UST_TRACEPOINT
;
1088 if (lttng_strncpy(ust_event
->attr
.name
, agent_event
->name
,
1089 LTTNG_SYMBOL_NAME_LEN
)) {
1093 switch (agent_event
->loglevel_type
) {
1094 case LTTNG_EVENT_LOGLEVEL_ALL
:
1095 ust_loglevel_type
= LTTNG_UST_LOGLEVEL_ALL
;
1097 case LTTNG_EVENT_LOGLEVEL_SINGLE
:
1098 ust_loglevel_type
= LTTNG_UST_LOGLEVEL_SINGLE
;
1100 case LTTNG_EVENT_LOGLEVEL_RANGE
:
1101 ust_loglevel_type
= LTTNG_UST_LOGLEVEL_RANGE
;
1104 ERR("Invalid agent_event loglevel_type.");
1109 ust_event
->attr
.loglevel_type
= ust_loglevel_type
;
1110 ust_event
->attr
.loglevel
= agent_event
->loglevel_value
;
1111 ust_event
->filter_expression
= agent_event
->filter_expression
;
1112 ust_event
->exclusion
= agent_event
->exclusion
;
1118 int save_agent_events(struct config_writer
*writer
,
1119 struct agent
*agent
)
1122 struct lttng_ht_iter iter
;
1123 struct lttng_ht_node_str
*node
;
1125 ret
= config_writer_open_element(writer
, config_element_events
);
1127 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1132 cds_lfht_for_each_entry(agent
->events
->ht
, &iter
.iter
, node
, node
) {
1134 struct agent_event
*agent_event
;
1135 struct ltt_ust_event fake_event
;
1137 memset(&fake_event
, 0, sizeof(fake_event
));
1138 agent_event
= caa_container_of(node
, struct agent_event
, node
);
1141 * Initialize a fake ust event to reuse the same serialization
1142 * function since UST and agent events contain the same info
1143 * (and one could wonder why they don't reuse the same
1146 ret
= init_ust_event_from_agent_event(&fake_event
, agent_event
);
1151 ret
= save_ust_event(writer
, &fake_event
);
1160 ret
= config_writer_close_element(writer
);
1162 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1170 int save_kernel_context(struct config_writer
*writer
,
1171 struct lttng_kernel_context
*ctx
)
1179 ret
= config_writer_open_element(writer
, config_element_context
);
1181 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1185 if (ctx
->ctx
== LTTNG_KERNEL_CONTEXT_PERF_CPU_COUNTER
) {
1186 ret
= config_writer_open_element(writer
,
1187 config_element_context_perf
);
1189 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1193 ret
= config_writer_write_element_unsigned_int(writer
,
1194 config_element_type
, ctx
->u
.perf_counter
.type
);
1196 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1200 ret
= config_writer_write_element_unsigned_int(writer
,
1201 config_element_config
, ctx
->u
.perf_counter
.config
);
1203 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1207 ret
= config_writer_write_element_string(writer
,
1208 config_element_name
, ctx
->u
.perf_counter
.name
);
1210 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1215 ret
= config_writer_close_element(writer
);
1217 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1221 const char *context_type_string
=
1222 get_kernel_context_type_string(ctx
->ctx
);
1224 if (!context_type_string
) {
1225 ERR("Unsupported kernel context type.");
1226 ret
= LTTNG_ERR_INVALID
;
1230 ret
= config_writer_write_element_string(writer
,
1231 config_element_type
, context_type_string
);
1233 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1239 ret
= config_writer_close_element(writer
);
1241 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1250 int save_kernel_contexts(struct config_writer
*writer
,
1251 struct ltt_kernel_channel
*kchan
)
1254 struct ltt_kernel_context
*ctx
;
1256 if (cds_list_empty(&kchan
->ctx_list
)) {
1261 ret
= config_writer_open_element(writer
, config_element_contexts
);
1263 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1267 cds_list_for_each_entry(ctx
, &kchan
->ctx_list
, list
) {
1268 ret
= save_kernel_context(writer
, &ctx
->ctx
);
1275 ret
= config_writer_close_element(writer
);
1277 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1285 int save_ust_context_perf_thread_counter(struct config_writer
*writer
,
1286 struct ltt_ust_context
*ctx
)
1293 /* Perf contexts are saved as event_perf_context_type */
1294 ret
= config_writer_open_element(writer
, config_element_context_perf
);
1296 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1300 ret
= config_writer_write_element_unsigned_int(writer
,
1301 config_element_type
, ctx
->ctx
.u
.perf_counter
.type
);
1303 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1307 ret
= config_writer_write_element_unsigned_int(writer
,
1308 config_element_config
, ctx
->ctx
.u
.perf_counter
.config
);
1310 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1314 ret
= config_writer_write_element_string(writer
, config_element_name
,
1315 ctx
->ctx
.u
.perf_counter
.name
);
1317 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1322 ret
= config_writer_close_element(writer
);
1324 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1332 int save_ust_context_app_ctx(struct config_writer
*writer
,
1333 struct ltt_ust_context
*ctx
)
1340 /* Application contexts are saved as application_context_type */
1341 ret
= config_writer_open_element(writer
, config_element_context_app
);
1343 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1347 ret
= config_writer_write_element_string(writer
,
1348 config_element_context_app_provider_name
,
1349 ctx
->ctx
.u
.app_ctx
.provider_name
);
1351 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1355 ret
= config_writer_write_element_string(writer
,
1356 config_element_context_app_ctx_name
,
1357 ctx
->ctx
.u
.app_ctx
.ctx_name
);
1359 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1364 ret
= config_writer_close_element(writer
);
1366 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1374 int save_ust_context_generic(struct config_writer
*writer
,
1375 struct ltt_ust_context
*ctx
)
1378 const char *context_type_string
;
1383 /* Save context as event_context_type_type */
1384 context_type_string
= get_ust_context_type_string(
1386 if (!context_type_string
) {
1387 ERR("Unsupported UST context type.");
1388 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1392 ret
= config_writer_write_element_string(writer
,
1393 config_element_type
, context_type_string
);
1395 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1403 int save_ust_context(struct config_writer
*writer
,
1404 struct cds_list_head
*ctx_list
)
1407 struct ltt_ust_context
*ctx
;
1412 ret
= config_writer_open_element(writer
, config_element_contexts
);
1414 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1418 cds_list_for_each_entry(ctx
, ctx_list
, list
) {
1419 ret
= config_writer_open_element(writer
,
1420 config_element_context
);
1422 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1426 switch (ctx
->ctx
.ctx
) {
1427 case LTTNG_UST_CONTEXT_PERF_THREAD_COUNTER
:
1428 ret
= save_ust_context_perf_thread_counter(writer
, ctx
);
1430 case LTTNG_UST_CONTEXT_APP_CONTEXT
:
1431 ret
= save_ust_context_app_ctx(writer
, ctx
);
1434 /* Save generic context. */
1435 ret
= save_ust_context_generic(writer
, ctx
);
1442 ret
= config_writer_close_element(writer
);
1444 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1450 ret
= config_writer_close_element(writer
);
1452 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1460 int save_kernel_channel(struct config_writer
*writer
,
1461 struct ltt_kernel_channel
*kchan
)
1468 ret
= config_writer_open_element(writer
, config_element_channel
);
1470 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1474 ret
= config_writer_write_element_string(writer
, config_element_name
,
1475 kchan
->channel
->name
);
1477 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1481 ret
= config_writer_write_element_bool(writer
, config_element_enabled
,
1482 kchan
->channel
->enabled
);
1484 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1488 ret
= save_kernel_channel_attributes(writer
, &kchan
->channel
->attr
);
1493 ret
= save_kernel_events(writer
, kchan
);
1498 ret
= save_kernel_contexts(writer
, kchan
);
1504 ret
= config_writer_close_element(writer
);
1506 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1514 int save_ust_channel(struct config_writer
*writer
,
1515 struct ltt_ust_channel
*ust_chan
,
1516 struct ltt_ust_session
*session
)
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
,
1533 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1537 ret
= config_writer_write_element_bool(writer
, config_element_enabled
,
1540 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1544 ret
= save_ust_channel_attributes(writer
, &ust_chan
->attr
);
1549 ret
= config_writer_write_element_unsigned_int(writer
,
1550 config_element_tracefile_size
, ust_chan
->tracefile_size
);
1552 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1556 ret
= config_writer_write_element_unsigned_int(writer
,
1557 config_element_tracefile_count
, ust_chan
->tracefile_count
);
1559 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1563 ret
= config_writer_write_element_unsigned_int(writer
,
1564 config_element_live_timer_interval
,
1565 session
->live_timer_interval
);
1567 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1571 if (ust_chan
->domain
== LTTNG_DOMAIN_UST
) {
1572 ret
= save_ust_events(writer
, ust_chan
->events
);
1577 struct agent
*agent
= NULL
;
1579 agent
= trace_ust_find_agent(session
, ust_chan
->domain
);
1581 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1582 ERR("Could not find agent associated to UST subdomain");
1587 * Channels associated with a UST sub-domain (such as JUL, Log4j
1588 * or Python) don't have any non-internal events. We retrieve
1589 * the "agent" events associated with this channel and serialize
1592 ret
= save_agent_events(writer
, agent
);
1598 ret
= save_ust_context(writer
, &ust_chan
->ctx_list
);
1604 ret
= config_writer_close_element(writer
);
1606 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1614 int save_kernel_session(struct config_writer
*writer
,
1615 struct ltt_session
*session
)
1618 struct ltt_kernel_channel
*kchan
;
1623 ret
= config_writer_write_element_string(writer
, config_element_type
,
1624 config_domain_type_kernel
);
1626 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1630 ret
= config_writer_write_element_string(writer
,
1631 config_element_buffer_type
, config_buffer_type_global
);
1633 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1637 ret
= config_writer_open_element(writer
,
1638 config_element_channels
);
1640 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1644 cds_list_for_each_entry(kchan
, &session
->kernel_session
->channel_list
.head
,
1646 ret
= save_kernel_channel(writer
, kchan
);
1653 ret
= config_writer_close_element(writer
);
1655 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1663 const char *get_config_domain_str(enum lttng_domain_type domain
)
1665 const char *str_dom
;
1668 case LTTNG_DOMAIN_KERNEL
:
1669 str_dom
= config_domain_type_kernel
;
1671 case LTTNG_DOMAIN_UST
:
1672 str_dom
= config_domain_type_ust
;
1674 case LTTNG_DOMAIN_JUL
:
1675 str_dom
= config_domain_type_jul
;
1677 case LTTNG_DOMAIN_LOG4J
:
1678 str_dom
= config_domain_type_log4j
;
1680 case LTTNG_DOMAIN_PYTHON
:
1681 str_dom
= config_domain_type_python
;
1691 int save_pid_tracker(struct config_writer
*writer
,
1692 struct ltt_session
*sess
, int domain
)
1695 ssize_t nr_pids
= 0, i
;
1696 int32_t *pids
= NULL
;
1699 case LTTNG_DOMAIN_KERNEL
:
1701 nr_pids
= kernel_list_tracker_pids(sess
->kernel_session
, &pids
);
1703 ret
= LTTNG_ERR_KERN_LIST_FAIL
;
1708 case LTTNG_DOMAIN_UST
:
1710 nr_pids
= trace_ust_list_tracker_pids(sess
->ust_session
, &pids
);
1712 ret
= LTTNG_ERR_UST_LIST_FAIL
;
1717 case LTTNG_DOMAIN_JUL
:
1718 case LTTNG_DOMAIN_LOG4J
:
1719 case LTTNG_DOMAIN_PYTHON
:
1721 ret
= LTTNG_ERR_UNKNOWN_DOMAIN
;
1725 /* Only create a pid_tracker if enabled or untrack all */
1726 if (nr_pids
!= 1 || (nr_pids
== 1 && pids
[0] != -1)) {
1727 ret
= config_writer_open_element(writer
,
1728 config_element_pid_tracker
);
1730 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1734 ret
= config_writer_open_element(writer
,
1735 config_element_targets
);
1737 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1741 for (i
= 0; i
< nr_pids
; i
++) {
1742 ret
= config_writer_open_element(writer
,
1743 config_element_target_pid
);
1745 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1749 ret
= config_writer_write_element_unsigned_int(writer
,
1750 config_element_pid
, pids
[i
]);
1752 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1757 ret
= config_writer_close_element(writer
);
1759 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1765 ret
= config_writer_close_element(writer
);
1767 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1772 ret
= config_writer_close_element(writer
);
1774 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1784 int save_ust_domain(struct config_writer
*writer
,
1785 struct ltt_session
*session
, enum lttng_domain_type domain
)
1788 struct ltt_ust_channel
*ust_chan
;
1789 const char *buffer_type_string
;
1790 struct lttng_ht_node_str
*node
;
1791 struct lttng_ht_iter iter
;
1792 const char *config_domain_name
;
1797 ret
= config_writer_open_element(writer
,
1798 config_element_domain
);
1800 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1804 config_domain_name
= get_config_domain_str(domain
);
1805 if (!config_domain_name
) {
1806 ret
= LTTNG_ERR_INVALID
;
1810 ret
= config_writer_write_element_string(writer
,
1811 config_element_type
, config_domain_name
);
1813 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1817 buffer_type_string
= get_buffer_type_string(
1818 session
->ust_session
->buffer_type
);
1819 if (!buffer_type_string
) {
1820 ERR("Unsupported buffer type.");
1821 ret
= LTTNG_ERR_INVALID
;
1825 ret
= config_writer_write_element_string(writer
,
1826 config_element_buffer_type
, buffer_type_string
);
1828 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1832 ret
= config_writer_open_element(writer
, config_element_channels
);
1834 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1839 cds_lfht_for_each_entry(session
->ust_session
->domain_global
.channels
->ht
,
1840 &iter
.iter
, node
, node
) {
1841 ust_chan
= caa_container_of(node
, struct ltt_ust_channel
, node
);
1842 if (domain
== ust_chan
->domain
) {
1843 ret
= save_ust_channel(writer
, ust_chan
, session
->ust_session
);
1853 ret
= config_writer_close_element(writer
);
1855 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1859 if (domain
== LTTNG_DOMAIN_UST
) {
1860 ret
= config_writer_open_element(writer
,
1861 config_element_trackers
);
1863 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1867 ret
= save_pid_tracker(writer
, session
, LTTNG_DOMAIN_UST
);
1873 ret
= config_writer_close_element(writer
);
1880 ret
= config_writer_close_element(writer
);
1882 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1891 int save_domains(struct config_writer
*writer
, struct ltt_session
*session
)
1898 if (!session
->kernel_session
&& !session
->ust_session
) {
1902 ret
= config_writer_open_element(writer
, config_element_domains
);
1904 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1909 if (session
->kernel_session
) {
1910 ret
= config_writer_open_element(writer
,
1911 config_element_domain
);
1913 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1917 ret
= save_kernel_session(writer
, session
);
1922 ret
= config_writer_open_element(writer
,
1923 config_element_trackers
);
1925 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1929 ret
= save_pid_tracker(writer
, session
, LTTNG_DOMAIN_KERNEL
);
1935 ret
= config_writer_close_element(writer
);
1937 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1941 ret
= config_writer_close_element(writer
);
1943 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1948 if (session
->ust_session
) {
1949 ret
= save_ust_domain(writer
, session
, LTTNG_DOMAIN_UST
);
1954 ret
= save_ust_domain(writer
, session
, LTTNG_DOMAIN_JUL
);
1959 ret
= save_ust_domain(writer
, session
, LTTNG_DOMAIN_LOG4J
);
1964 ret
= save_ust_domain(writer
, session
, LTTNG_DOMAIN_PYTHON
);
1971 ret
= config_writer_close_element(writer
);
1973 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1981 int save_consumer_output(struct config_writer
*writer
,
1982 struct consumer_output
*output
)
1989 ret
= config_writer_open_element(writer
, config_element_consumer_output
);
1991 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1995 ret
= config_writer_write_element_bool(writer
, config_element_enabled
,
1998 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2002 ret
= config_writer_open_element(writer
, config_element_destination
);
2004 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2008 switch (output
->type
) {
2009 case CONSUMER_DST_LOCAL
:
2010 ret
= config_writer_write_element_string(writer
,
2011 config_element_path
, output
->dst
.session_root_path
);
2013 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2017 case CONSUMER_DST_NET
:
2021 uri
= zmalloc(PATH_MAX
);
2023 ret
= LTTNG_ERR_NOMEM
;
2027 ret
= config_writer_open_element(writer
, config_element_net_output
);
2029 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2030 goto end_net_output
;
2033 if (output
->dst
.net
.control_isset
&&
2034 output
->dst
.net
.data_isset
) {
2035 ret
= uri_to_str_url(&output
->dst
.net
.control
, uri
, PATH_MAX
);
2037 ret
= LTTNG_ERR_INVALID
;
2038 goto end_net_output
;
2041 ret
= config_writer_write_element_string(writer
,
2042 config_element_control_uri
, uri
);
2044 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2045 goto end_net_output
;
2048 ret
= uri_to_str_url(&output
->dst
.net
.data
, uri
, PATH_MAX
);
2050 ret
= LTTNG_ERR_INVALID
;
2051 goto end_net_output
;
2054 ret
= config_writer_write_element_string(writer
,
2055 config_element_data_uri
, uri
);
2057 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2058 goto end_net_output
;
2067 ret
= !output
->dst
.net
.control_isset
?
2068 LTTNG_ERR_URL_CTRL_MISS
:
2069 LTTNG_ERR_URL_DATA_MISS
;
2074 ret
= config_writer_close_element(writer
);
2076 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2082 ERR("Unsupported consumer output type.");
2083 ret
= LTTNG_ERR_INVALID
;
2088 ret
= config_writer_close_element(writer
);
2090 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2094 /* /consumer_output */
2095 ret
= config_writer_close_element(writer
);
2097 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2105 int save_snapshot_outputs(struct config_writer
*writer
,
2106 struct snapshot
*snapshot
)
2109 struct lttng_ht_iter iter
;
2110 struct snapshot_output
*output
;
2115 ret
= config_writer_open_element(writer
, config_element_snapshot_outputs
);
2117 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2122 cds_lfht_for_each_entry(snapshot
->output_ht
->ht
, &iter
.iter
, output
,
2124 ret
= config_writer_open_element(writer
,
2125 config_element_output
);
2127 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2131 ret
= config_writer_write_element_string(writer
,
2132 config_element_name
, output
->name
);
2134 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2138 ret
= config_writer_write_element_unsigned_int(writer
,
2139 config_element_max_size
, output
->max_size
);
2141 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2145 ret
= save_consumer_output(writer
, output
->consumer
);
2151 ret
= config_writer_close_element(writer
);
2153 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2159 /* /snapshot_outputs */
2160 ret
= config_writer_close_element(writer
);
2162 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2174 int save_session_output(struct config_writer
*writer
,
2175 struct ltt_session
*session
)
2182 if ((session
->snapshot_mode
&& session
->snapshot
.nb_output
== 0) ||
2183 (!session
->snapshot_mode
&& !session
->consumer
)) {
2184 /* Session is in no output mode */
2189 ret
= config_writer_open_element(writer
, config_element_output
);
2191 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2195 if (session
->snapshot_mode
) {
2196 ret
= save_snapshot_outputs(writer
, &session
->snapshot
);
2201 if (session
->consumer
) {
2202 ret
= save_consumer_output(writer
, session
->consumer
);
2210 ret
= config_writer_close_element(writer
);
2212 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2220 int save_session_rotation_schedule(struct config_writer
*writer
,
2221 enum lttng_rotation_schedule_type type
, uint64_t value
)
2224 const char *element_name
;
2225 const char *value_name
;
2228 case LTTNG_ROTATION_SCHEDULE_TYPE_PERIODIC
:
2229 element_name
= config_element_rotation_schedule_periodic
;
2230 value_name
= config_element_rotation_schedule_periodic_time_us
;
2232 case LTTNG_ROTATION_SCHEDULE_TYPE_SIZE_THRESHOLD
:
2233 element_name
= config_element_rotation_schedule_size_threshold
;
2234 value_name
= config_element_rotation_schedule_size_threshold_bytes
;
2241 ret
= config_writer_open_element(writer
, element_name
);
2246 ret
= config_writer_write_element_unsigned_int(writer
,
2252 /* Close schedule descriptor element. */
2253 ret
= config_writer_close_element(writer
);
2262 int save_session_rotation_schedules(struct config_writer
*writer
,
2263 struct ltt_session
*session
)
2267 ret
= config_writer_open_element(writer
,
2268 config_element_rotation_schedules
);
2272 if (session
->rotate_timer_period
) {
2273 ret
= save_session_rotation_schedule(writer
,
2274 LTTNG_ROTATION_SCHEDULE_TYPE_PERIODIC
,
2275 session
->rotate_timer_period
);
2277 goto close_schedules
;
2280 if (session
->rotate_size
) {
2281 ret
= save_session_rotation_schedule(writer
,
2282 LTTNG_ROTATION_SCHEDULE_TYPE_SIZE_THRESHOLD
,
2283 session
->rotate_size
);
2285 goto close_schedules
;
2290 /* Close rotation schedules element. */
2291 ret
= config_writer_close_element(writer
);
2300 * Save the given session.
2302 * Return 0 on success else a LTTNG_ERR* code.
2305 int save_session(struct ltt_session
*session
,
2306 struct lttng_save_session_attr
*attr
, lttng_sock_cred
*creds
)
2309 char config_file_path
[LTTNG_PATH_MAX
];
2311 struct config_writer
*writer
= NULL
;
2312 size_t session_name_len
;
2313 const char *provided_path
;
2314 int file_open_flags
= O_CREAT
| O_WRONLY
| O_TRUNC
;
2320 session_name_len
= strlen(session
->name
);
2321 memset(config_file_path
, 0, sizeof(config_file_path
));
2323 if (!session_access_ok(session
,
2324 LTTNG_SOCK_GET_UID_CRED(creds
),
2325 LTTNG_SOCK_GET_GID_CRED(creds
)) || session
->destroyed
) {
2326 ret
= LTTNG_ERR_EPERM
;
2330 provided_path
= lttng_save_session_attr_get_output_url(attr
);
2331 if (provided_path
) {
2332 DBG3("Save session in provided path %s", provided_path
);
2333 len
= strlen(provided_path
);
2334 if (len
>= sizeof(config_file_path
)) {
2335 ret
= LTTNG_ERR_SET_URL
;
2338 strncpy(config_file_path
, provided_path
, sizeof(config_file_path
));
2341 char *home_dir
= utils_get_user_home_dir(
2342 LTTNG_SOCK_GET_UID_CRED(creds
));
2344 ret
= LTTNG_ERR_SET_URL
;
2348 ret_len
= snprintf(config_file_path
, sizeof(config_file_path
),
2349 DEFAULT_SESSION_HOME_CONFIGPATH
, home_dir
);
2352 PERROR("snprintf save session");
2353 ret
= LTTNG_ERR_SET_URL
;
2360 * Check the path fits in the config file path dst including the '/'
2361 * followed by trailing .lttng extension and the NULL terminated string.
2363 if ((len
+ session_name_len
+ 2 +
2364 sizeof(DEFAULT_SESSION_CONFIG_FILE_EXTENSION
))
2365 > sizeof(config_file_path
)) {
2366 ret
= LTTNG_ERR_SET_URL
;
2370 ret
= run_as_mkdir_recursive(config_file_path
, S_IRWXU
| S_IRWXG
,
2371 LTTNG_SOCK_GET_UID_CRED(creds
), LTTNG_SOCK_GET_GID_CRED(creds
));
2373 ret
= LTTNG_ERR_SET_URL
;
2378 * At this point, we know that everything fits in the buffer. Validation
2379 * was done just above.
2381 config_file_path
[len
++] = '/';
2382 strncpy(config_file_path
+ len
, session
->name
, sizeof(config_file_path
) - len
);
2383 len
+= session_name_len
;
2384 strcpy(config_file_path
+ len
, DEFAULT_SESSION_CONFIG_FILE_EXTENSION
);
2385 len
+= sizeof(DEFAULT_SESSION_CONFIG_FILE_EXTENSION
);
2386 config_file_path
[len
] = '\0';
2388 if (!attr
->overwrite
) {
2389 file_open_flags
|= O_EXCL
;
2392 fd
= run_as_open(config_file_path
, file_open_flags
,
2393 S_IRUSR
| S_IWUSR
| S_IRGRP
| S_IWGRP
,
2394 LTTNG_SOCK_GET_UID_CRED(creds
), LTTNG_SOCK_GET_GID_CRED(creds
));
2396 PERROR("Could not create configuration file");
2399 ret
= LTTNG_ERR_SAVE_FILE_EXIST
;
2402 ret
= LTTNG_ERR_EPERM
;
2405 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2411 writer
= config_writer_create(fd
, 1);
2413 ret
= LTTNG_ERR_NOMEM
;
2417 ret
= config_writer_open_element(writer
, config_element_sessions
);
2419 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2423 ret
= config_writer_open_element(writer
, config_element_session
);
2425 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2429 ret
= config_writer_write_element_string(writer
, config_element_name
,
2432 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2436 if(session
->shm_path
[0] != '\0') {
2437 ret
= config_writer_write_element_string(writer
,
2438 config_element_shared_memory_path
,
2441 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2446 ret
= save_domains(writer
, session
);
2451 ret
= config_writer_write_element_bool(writer
, config_element_started
,
2454 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2458 if (session
->snapshot_mode
|| session
->live_timer
||
2459 session
->rotate_timer_period
|| session
->rotate_size
) {
2460 ret
= config_writer_open_element(writer
, config_element_attributes
);
2462 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2466 if (session
->snapshot_mode
) {
2467 ret
= config_writer_write_element_bool(writer
,
2468 config_element_snapshot_mode
, 1);
2470 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2473 } else if (session
->live_timer
) {
2474 ret
= config_writer_write_element_unsigned_int(writer
,
2475 config_element_live_timer_interval
, session
->live_timer
);
2477 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2481 if (session
->rotate_timer_period
|| session
->rotate_size
) {
2482 ret
= save_session_rotation_schedules(writer
,
2485 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2491 ret
= config_writer_close_element(writer
);
2493 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2498 ret
= save_session_output(writer
, session
);
2504 ret
= config_writer_close_element(writer
);
2506 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2511 ret
= config_writer_close_element(writer
);
2513 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
2517 if (writer
&& config_writer_destroy(writer
)) {
2518 /* Preserve the original error code */
2519 ret
= ret
? ret
: LTTNG_ERR_SAVE_IO_FAIL
;
2522 /* Delete file in case of error */
2523 if ((fd
>= 0) && unlink(config_file_path
)) {
2524 PERROR("Unlinking XML session configuration.");
2531 PERROR("Closing XML session configuration");
2538 int cmd_save_sessions(struct lttng_save_session_attr
*attr
,
2539 lttng_sock_cred
*creds
)
2542 const char *session_name
;
2543 struct ltt_session
*session
;
2545 session_lock_list();
2547 session_name
= lttng_save_session_attr_get_session_name(attr
);
2549 session
= session_find_by_name(session_name
);
2551 ret
= LTTNG_ERR_SESS_NOT_FOUND
;
2555 session_lock(session
);
2556 ret
= save_session(session
, attr
, creds
);
2557 session_unlock(session
);
2558 session_put(session
);
2563 struct ltt_session_list
*list
= session_get_list();
2565 cds_list_for_each_entry(session
, &list
->head
, list
) {
2566 if (!session_get(session
)) {
2569 session_lock(session
);
2570 ret
= save_session(session
, attr
, creds
);
2571 session_unlock(session
);
2572 session_put(session
);
2573 /* Don't abort if we don't have the required permissions. */
2574 if (ret
&& ret
!= LTTNG_ERR_EPERM
) {
2582 session_unlock_list();