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/config.h>
28 #include <common/utils.h>
29 #include <common/runas.h>
30 #include <lttng/save-internal.h>
34 #include "trace-ust.h"
37 int save_kernel_channel_attributes(struct config_writer
*writer
,
38 struct lttng_channel_attr
*attr
)
42 ret
= config_writer_write_element_string(writer
,
43 config_element_overwrite_mode
,
44 attr
->overwrite
? config_overwrite_mode_overwrite
:
45 config_overwrite_mode_discard
);
50 ret
= config_writer_write_element_unsigned_int(writer
,
51 config_element_subbuf_size
, attr
->subbuf_size
);
56 ret
= config_writer_write_element_unsigned_int(writer
,
57 config_element_num_subbuf
,
63 ret
= config_writer_write_element_unsigned_int(writer
,
64 config_element_switch_timer_interval
,
65 attr
->switch_timer_interval
);
70 ret
= config_writer_write_element_unsigned_int(writer
,
71 config_element_read_timer_interval
,
72 attr
->read_timer_interval
);
77 ret
= config_writer_write_element_string(writer
,
78 config_element_output_type
,
79 attr
->output
== LTTNG_EVENT_SPLICE
?
80 config_output_type_splice
: config_output_type_mmap
);
85 ret
= config_writer_write_element_unsigned_int(writer
,
86 config_element_tracefile_size
, attr
->tracefile_size
);
91 ret
= config_writer_write_element_unsigned_int(writer
,
92 config_element_tracefile_count
,
93 attr
->tracefile_count
);
98 ret
= config_writer_write_element_unsigned_int(writer
,
99 config_element_live_timer_interval
,
100 attr
->live_timer_interval
);
105 return ret
? LTTNG_ERR_SAVE_IO_FAIL
: 0;
109 int save_ust_channel_attributes(struct config_writer
*writer
,
110 struct lttng_ust_channel_attr
*attr
)
114 ret
= config_writer_write_element_string(writer
,
115 config_element_overwrite_mode
,
116 attr
->overwrite
? config_overwrite_mode_overwrite
:
117 config_overwrite_mode_discard
);
122 ret
= config_writer_write_element_unsigned_int(writer
,
123 config_element_subbuf_size
, attr
->subbuf_size
);
128 ret
= config_writer_write_element_unsigned_int(writer
,
129 config_element_num_subbuf
,
135 ret
= config_writer_write_element_unsigned_int(writer
,
136 config_element_switch_timer_interval
,
137 attr
->switch_timer_interval
);
142 ret
= config_writer_write_element_unsigned_int(writer
,
143 config_element_read_timer_interval
,
144 attr
->read_timer_interval
);
149 ret
= config_writer_write_element_string(writer
,
150 config_element_output_type
,
151 attr
->output
== LTTNG_UST_MMAP
?
152 config_output_type_mmap
: config_output_type_splice
);
157 return ret
? LTTNG_ERR_SAVE_IO_FAIL
: 0;
161 const char *get_kernel_instrumentation_string(
162 enum lttng_kernel_instrumentation instrumentation
)
164 const char *instrumentation_string
;
166 switch (instrumentation
) {
167 case LTTNG_KERNEL_ALL
:
168 instrumentation_string
= config_event_type_all
;
170 case LTTNG_KERNEL_TRACEPOINT
:
171 instrumentation_string
= config_event_type_tracepoint
;
173 case LTTNG_KERNEL_KPROBE
:
174 instrumentation_string
= config_event_type_kprobe
;
176 case LTTNG_KERNEL_FUNCTION
:
177 instrumentation_string
= config_event_type_function
;
179 case LTTNG_KERNEL_KRETPROBE
:
180 instrumentation_string
= config_event_type_kretprobe
;
182 case LTTNG_KERNEL_NOOP
:
183 instrumentation_string
= config_event_type_noop
;
185 case LTTNG_KERNEL_SYSCALL
:
186 instrumentation_string
= config_event_type_syscall
;
189 instrumentation_string
= NULL
;
192 return instrumentation_string
;
196 const char *get_kernel_context_type_string(
197 enum lttng_kernel_context_type context_type
)
199 const char *context_type_string
;
201 switch (context_type
) {
202 case LTTNG_KERNEL_CONTEXT_PID
:
203 context_type_string
= config_event_context_pid
;
205 case LTTNG_KERNEL_CONTEXT_PROCNAME
:
206 context_type_string
= config_event_context_procname
;
208 case LTTNG_KERNEL_CONTEXT_PRIO
:
209 context_type_string
= config_event_context_prio
;
211 case LTTNG_KERNEL_CONTEXT_NICE
:
212 context_type_string
= config_event_context_nice
;
214 case LTTNG_KERNEL_CONTEXT_VPID
:
215 context_type_string
= config_event_context_vpid
;
217 case LTTNG_KERNEL_CONTEXT_TID
:
218 context_type_string
= config_event_context_tid
;
220 case LTTNG_KERNEL_CONTEXT_VTID
:
221 context_type_string
= config_event_context_vtid
;
223 case LTTNG_KERNEL_CONTEXT_PPID
:
224 context_type_string
= config_event_context_ppid
;
226 case LTTNG_KERNEL_CONTEXT_VPPID
:
227 context_type_string
= config_event_context_vppid
;
229 case LTTNG_KERNEL_CONTEXT_HOSTNAME
:
230 context_type_string
= config_event_context_hostname
;
233 context_type_string
= NULL
;
236 return context_type_string
;
240 const char *get_ust_context_type_string(
241 enum lttng_ust_context_type context_type
)
243 const char *context_type_string
;
245 switch (context_type
) {
246 case LTTNG_UST_CONTEXT_PROCNAME
:
247 context_type_string
= config_event_context_procname
;
249 case LTTNG_UST_CONTEXT_VPID
:
250 context_type_string
= config_event_context_vpid
;
252 case LTTNG_UST_CONTEXT_VTID
:
253 context_type_string
= config_event_context_vtid
;
255 case LTTNG_UST_CONTEXT_IP
:
256 context_type_string
= config_event_context_ip
;
258 case LTTNG_UST_CONTEXT_PTHREAD_ID
:
259 context_type_string
= config_event_context_pthread_id
;
262 context_type_string
= NULL
;
265 return context_type_string
;
269 const char *get_buffer_type_string(
270 enum lttng_buffer_type buffer_type
)
272 const char *buffer_type_string
;
274 switch (buffer_type
) {
275 case LTTNG_BUFFER_PER_PID
:
276 buffer_type_string
= config_buffer_type_per_pid
;
278 case LTTNG_BUFFER_PER_UID
:
279 buffer_type_string
= config_buffer_type_per_uid
;
281 case LTTNG_BUFFER_GLOBAL
:
282 buffer_type_string
= config_buffer_type_global
;
285 buffer_type_string
= NULL
;
288 return buffer_type_string
;
292 const char *get_loglevel_type_string(
293 enum lttng_ust_loglevel_type loglevel_type
)
295 const char *loglevel_type_string
;
297 switch (loglevel_type
) {
298 case LTTNG_UST_LOGLEVEL_ALL
:
299 loglevel_type_string
= config_loglevel_type_all
;
301 case LTTNG_UST_LOGLEVEL_RANGE
:
302 loglevel_type_string
= config_loglevel_type_range
;
304 case LTTNG_UST_LOGLEVEL_SINGLE
:
305 loglevel_type_string
= config_loglevel_type_single
;
308 loglevel_type_string
= NULL
;
311 return loglevel_type_string
;
315 int save_kernel_event(struct config_writer
*writer
,
316 struct ltt_kernel_event
*event
)
319 const char *instrumentation_type
;
321 ret
= config_writer_open_element(writer
, config_element_event
);
323 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
327 if (event
->event
->name
[0]) {
328 ret
= config_writer_write_element_string(writer
,
329 config_element_name
, event
->event
->name
);
331 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
336 ret
= config_writer_write_element_bool(writer
, config_element_enabled
,
339 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
343 instrumentation_type
= get_kernel_instrumentation_string(
344 event
->event
->instrumentation
);
345 if (!instrumentation_type
) {
346 ret
= LTTNG_ERR_INVALID
;
350 ret
= config_writer_write_element_string(writer
, config_element_type
,
351 instrumentation_type
);
353 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
357 if (event
->event
->instrumentation
== LTTNG_KERNEL_FUNCTION
||
358 event
->event
->instrumentation
== LTTNG_KERNEL_KPROBE
||
359 event
->event
->instrumentation
== LTTNG_KERNEL_KRETPROBE
) {
361 ret
= config_writer_open_element(writer
,
362 config_element_attributes
);
364 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
368 switch (event
->event
->instrumentation
) {
369 case LTTNG_KERNEL_FUNCTION
:
370 ret
= config_writer_open_element(writer
,
371 config_element_function_attributes
);
373 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
377 ret
= config_writer_write_element_string(writer
,
379 event
->event
->u
.ftrace
.symbol_name
);
381 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
385 /* /function attributes */
386 ret
= config_writer_close_element(writer
);
388 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
392 case LTTNG_KERNEL_KPROBE
:
393 case LTTNG_KERNEL_KRETPROBE
:
395 const char *symbol_name
;
399 if (event
->event
->instrumentation
==
400 LTTNG_KERNEL_KPROBE
) {
402 * Comments in lttng-kernel.h mention that
403 * either addr or symbol_name are set, not both.
405 addr
= event
->event
->u
.kprobe
.addr
;
406 offset
= event
->event
->u
.kprobe
.offset
;
407 symbol_name
= addr
? NULL
:
408 event
->event
->u
.kprobe
.symbol_name
;
411 event
->event
->u
.kretprobe
.symbol_name
;
412 addr
= event
->event
->u
.kretprobe
.addr
;
413 offset
= event
->event
->u
.kretprobe
.offset
;
416 ret
= config_writer_open_element(writer
,
417 config_element_probe_attributes
);
419 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
424 ret
= config_writer_write_element_string(writer
,
425 config_element_symbol_name
,
428 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
434 ret
= config_writer_write_element_unsigned_int(
435 writer
, config_element_address
, addr
);
437 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
443 ret
= config_writer_write_element_unsigned_int(
444 writer
, config_element_offset
, offset
);
446 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
451 ret
= config_writer_close_element(writer
);
453 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
459 ERR("Unsupported kernel instrumentation type.");
460 ret
= LTTNG_ERR_INVALID
;
465 ret
= config_writer_close_element(writer
);
467 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
473 ret
= config_writer_close_element(writer
);
475 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
483 int save_kernel_events(struct config_writer
*writer
,
484 struct ltt_kernel_event_list
*event_list
)
487 struct ltt_kernel_event
*event
;
489 ret
= config_writer_open_element(writer
, config_element_events
);
491 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
495 cds_list_for_each_entry(event
, &event_list
->head
, list
) {
496 ret
= save_kernel_event(writer
, event
);
503 ret
= config_writer_close_element(writer
);
505 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
513 int save_ust_event(struct config_writer
*writer
,
514 struct ltt_ust_event
*event
)
517 const char *loglevel_type_string
;
519 ret
= config_writer_open_element(writer
, config_element_event
);
521 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
525 if (event
->attr
.name
[0]) {
526 ret
= config_writer_write_element_string(writer
,
527 config_element_name
, event
->attr
.name
);
529 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
534 ret
= config_writer_write_element_bool(writer
, config_element_enabled
,
537 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
541 if (event
->attr
.instrumentation
!= LTTNG_UST_TRACEPOINT
) {
542 ERR("Unsupported UST instrumentation type.");
543 ret
= LTTNG_ERR_INVALID
;
546 ret
= config_writer_write_element_string(writer
, config_element_type
,
547 config_event_type_tracepoint
);
549 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
553 loglevel_type_string
= get_loglevel_type_string(
554 event
->attr
.loglevel_type
);
555 if (!loglevel_type_string
) {
556 ERR("Unsupported UST loglevel type.");
557 ret
= LTTNG_ERR_INVALID
;
561 ret
= config_writer_write_element_string(writer
,
562 config_element_loglevel_type
, loglevel_type_string
);
564 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
568 ret
= config_writer_write_element_signed_int(writer
,
569 config_element_loglevel
, event
->attr
.loglevel
);
571 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
575 if (event
->filter_expression
) {
576 ret
= config_writer_write_element_string(writer
,
577 config_element_filter
, event
->filter_expression
);
579 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
584 if (event
->exclusion
&& event
->exclusion
->count
) {
587 ret
= config_writer_open_element(writer
,
588 config_element_exclusions
);
590 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
594 for (i
= 0; i
< event
->exclusion
->count
; i
++) {
595 ret
= config_writer_write_element_string(writer
,
596 config_element_exclusion
,
597 &event
->exclusion
->names
[0][i
]);
599 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
605 ret
= config_writer_close_element(writer
);
607 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
613 ret
= config_writer_close_element(writer
);
615 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
623 int save_ust_events(struct config_writer
*writer
,
624 struct lttng_ht
*events
)
627 struct ltt_ust_event
*event
;
628 struct lttng_ht_node_str
*node
;
629 struct lttng_ht_iter iter
;
631 ret
= config_writer_open_element(writer
, config_element_events
);
633 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
638 cds_lfht_for_each_entry(events
->ht
, &iter
.iter
, node
, node
) {
639 event
= caa_container_of(node
, struct ltt_ust_event
, node
);
641 ret
= save_ust_event(writer
, event
);
650 ret
= config_writer_close_element(writer
);
652 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
660 int save_kernel_context(struct config_writer
*writer
,
661 struct lttng_kernel_context
*ctx
)
669 ret
= config_writer_open_element(writer
, config_element_contexts
);
671 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
675 ret
= config_writer_open_element(writer
, config_element_context
);
677 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
681 if (ctx
->ctx
== LTTNG_KERNEL_CONTEXT_PERF_COUNTER
) {
682 ret
= config_writer_open_element(writer
, config_element_perf
);
684 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
688 ret
= config_writer_write_element_unsigned_int(writer
,
689 config_element_type
, ctx
->u
.perf_counter
.type
);
691 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
695 ret
= config_writer_write_element_unsigned_int(writer
,
696 config_element_config
, ctx
->u
.perf_counter
.config
);
698 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
702 ret
= config_writer_write_element_string(writer
,
703 config_element_name
, ctx
->u
.perf_counter
.name
);
705 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
710 ret
= config_writer_close_element(writer
);
712 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
716 const char *context_type_string
=
717 get_kernel_context_type_string(ctx
->ctx
);
719 if (!context_type_string
) {
720 ERR("Unsupported kernel context type.");
721 ret
= LTTNG_ERR_INVALID
;
725 ret
= config_writer_write_element_string(writer
,
726 config_element_type
, context_type_string
);
728 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
734 ret
= config_writer_close_element(writer
);
736 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
741 ret
= config_writer_close_element(writer
);
743 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
751 int save_ust_context(struct config_writer
*writer
,
752 struct cds_list_head
*ctx_list
)
755 struct ltt_ust_context
*ctx
;
760 ret
= config_writer_open_element(writer
, config_element_contexts
);
762 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
766 cds_list_for_each_entry(ctx
, ctx_list
, list
) {
767 const char *context_type_string
;
769 context_type_string
= get_ust_context_type_string(ctx
->ctx
.ctx
);
770 if (!context_type_string
) {
771 ERR("Unsupported UST context type.")
772 ret
= LTTNG_ERR_INVALID
;
776 ret
= config_writer_open_element(writer
,
777 config_element_context
);
779 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
783 ret
= config_writer_write_element_string(writer
,
784 config_element_type
, context_type_string
);
786 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
791 ret
= config_writer_close_element(writer
);
793 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
799 ret
= config_writer_close_element(writer
);
801 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
809 int save_kernel_channel(struct config_writer
*writer
,
810 struct ltt_kernel_channel
*kchan
)
817 ret
= config_writer_open_element(writer
, config_element_channel
);
819 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
823 ret
= config_writer_write_element_string(writer
, config_element_name
,
824 kchan
->channel
->name
);
826 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
830 ret
= config_writer_write_element_bool(writer
, config_element_enabled
,
831 kchan
->channel
->enabled
);
833 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
837 ret
= save_kernel_channel_attributes(writer
, &kchan
->channel
->attr
);
842 ret
= save_kernel_events(writer
, &kchan
->events_list
);
847 ret
= save_kernel_context(writer
, kchan
->ctx
);
853 ret
= config_writer_close_element(writer
);
855 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
863 int save_ust_channel(struct config_writer
*writer
,
864 struct ltt_ust_channel
*ust_chan
,
865 struct ltt_ust_session
*session
)
873 ret
= config_writer_open_element(writer
, config_element_channel
);
875 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
879 ret
= config_writer_write_element_string(writer
, config_element_name
,
882 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
886 ret
= config_writer_write_element_bool(writer
, config_element_enabled
,
889 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
893 ret
= save_ust_channel_attributes(writer
, &ust_chan
->attr
);
898 ret
= config_writer_write_element_unsigned_int(writer
,
899 config_element_tracefile_size
, ust_chan
->tracefile_size
);
901 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
905 ret
= config_writer_write_element_unsigned_int(writer
,
906 config_element_tracefile_count
, ust_chan
->tracefile_count
);
908 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
912 ret
= config_writer_write_element_unsigned_int(writer
,
913 config_element_live_timer_interval
,
914 session
->live_timer_interval
);
916 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
920 ret
= save_ust_events(writer
, ust_chan
->events
);
922 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
926 ret
= save_ust_context(writer
, &ust_chan
->ctx_list
);
932 ret
= config_writer_close_element(writer
);
934 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
942 int save_kernel_session(struct config_writer
*writer
,
943 struct ltt_session
*session
)
946 struct ltt_kernel_channel
*kchan
;
951 ret
= config_writer_write_element_string(writer
, config_element_type
,
952 config_domain_type_kernel
);
954 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
958 ret
= config_writer_write_element_string(writer
,
959 config_element_buffer_type
, config_buffer_type_global
);
961 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
965 ret
= config_writer_open_element(writer
,
966 config_element_channels
);
968 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
972 cds_list_for_each_entry(kchan
, &session
->kernel_session
->channel_list
.head
,
974 ret
= save_kernel_channel(writer
, kchan
);
981 ret
= config_writer_close_element(writer
);
983 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
991 int save_ust_session(struct config_writer
*writer
,
992 struct ltt_session
*session
, int save_jul
)
995 struct ltt_ust_channel
*ust_chan
;
996 const char *buffer_type_string
;
997 struct lttng_ht_node_str
*node
;
998 struct lttng_ht_iter iter
;
1003 ret
= config_writer_write_element_string(writer
, config_element_type
,
1004 save_jul
? config_domain_type_jul
: config_domain_type_ust
);
1006 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1010 buffer_type_string
= get_buffer_type_string(
1011 session
->ust_session
->buffer_type
);
1012 if (!buffer_type_string
) {
1013 ERR("Unsupported buffer type.");
1014 ret
= LTTNG_ERR_INVALID
;
1018 ret
= config_writer_write_element_string(writer
,
1019 config_element_buffer_type
, buffer_type_string
);
1021 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1025 ret
= config_writer_open_element(writer
, config_element_channels
);
1027 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1032 cds_lfht_for_each_entry(session
->ust_session
->domain_global
.channels
->ht
,
1033 &iter
.iter
, node
, node
) {
1036 ust_chan
= caa_container_of(node
, struct ltt_ust_channel
, node
);
1037 jul_channel
= !strcmp(DEFAULT_JUL_CHANNEL_NAME
, ust_chan
->name
);
1038 if (!(save_jul
^ jul_channel
)) {
1039 ret
= save_ust_channel(writer
, ust_chan
, session
->ust_session
);
1049 ret
= config_writer_close_element(writer
);
1051 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1059 int save_domains(struct config_writer
*writer
, struct ltt_session
*session
)
1066 if (!session
->kernel_session
&& !session
->ust_session
) {
1070 ret
= config_writer_open_element(writer
, config_element_domains
);
1072 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1077 if (session
->kernel_session
) {
1078 ret
= config_writer_open_element(writer
,
1079 config_element_domain
);
1081 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1085 ret
= save_kernel_session(writer
, session
);
1091 ret
= config_writer_close_element(writer
);
1093 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1098 if (session
->ust_session
) {
1099 ret
= config_writer_open_element(writer
,
1100 config_element_domain
);
1102 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1106 ret
= save_ust_session(writer
, session
, 0);
1112 ret
= config_writer_close_element(writer
);
1114 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1119 if (session
->ust_session
&&
1120 session
->ust_session
->domain_jul
.being_used
) {
1121 ret
= config_writer_open_element(writer
,
1122 config_element_domain
);
1124 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1128 ret
= save_ust_session(writer
, session
, 1);
1134 ret
= config_writer_close_element(writer
);
1136 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1142 ret
= config_writer_close_element(writer
);
1144 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1152 int save_consumer_output(struct config_writer
*writer
,
1153 struct consumer_output
*output
)
1160 ret
= config_writer_open_element(writer
, config_element_consumer_output
);
1162 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1166 ret
= config_writer_write_element_bool(writer
, config_element_enabled
,
1169 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1173 ret
= config_writer_open_element(writer
, config_element_destination
);
1175 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1179 switch (output
->type
) {
1180 case CONSUMER_DST_LOCAL
:
1181 ret
= config_writer_write_element_string(writer
,
1182 config_element_path
, output
->dst
.trace_path
);
1184 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1188 case CONSUMER_DST_NET
:
1192 uri
= zmalloc(PATH_MAX
);
1194 ret
= LTTNG_ERR_NOMEM
;
1198 ret
= config_writer_open_element(writer
, config_element_net_output
);
1200 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1201 goto end_net_output
;
1204 if (output
->dst
.net
.control_isset
&&
1205 output
->dst
.net
.data_isset
) {
1206 ret
= uri_to_str_url(&output
->dst
.net
.control
, uri
, PATH_MAX
);
1208 ret
= LTTNG_ERR_INVALID
;
1209 goto end_net_output
;
1212 ret
= config_writer_write_element_string(writer
,
1213 config_element_control_uri
, uri
);
1215 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1216 goto end_net_output
;
1219 ret
= uri_to_str_url(&output
->dst
.net
.data
, uri
, PATH_MAX
);
1221 ret
= LTTNG_ERR_INVALID
;
1222 goto end_net_output
;
1225 ret
= config_writer_write_element_string(writer
,
1226 config_element_data_uri
, uri
);
1228 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1229 goto end_net_output
;
1238 ret
= !output
->dst
.net
.control_isset
?
1239 LTTNG_ERR_URL_CTRL_MISS
:
1240 LTTNG_ERR_URL_DATA_MISS
;
1245 ret
= config_writer_close_element(writer
);
1247 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1253 ERR("Unsupported consumer output type.");
1254 ret
= LTTNG_ERR_INVALID
;
1259 ret
= config_writer_close_element(writer
);
1261 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1265 /* /consumer_output */
1266 ret
= config_writer_close_element(writer
);
1268 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1276 int save_snapshot_outputs(struct config_writer
*writer
,
1277 struct snapshot
*snapshot
)
1280 struct lttng_ht_iter iter
;
1281 struct snapshot_output
*output
;
1286 ret
= config_writer_open_element(writer
, config_element_snapshot_outputs
);
1288 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1293 cds_lfht_for_each_entry(snapshot
->output_ht
->ht
, &iter
.iter
, output
,
1295 ret
= config_writer_open_element(writer
,
1296 config_element_output
);
1298 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1302 ret
= config_writer_write_element_string(writer
,
1303 config_element_name
, output
->name
);
1305 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1309 ret
= config_writer_write_element_unsigned_int(writer
,
1310 config_element_max_size
, output
->max_size
);
1312 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1316 ret
= save_consumer_output(writer
, output
->consumer
);
1322 ret
= config_writer_close_element(writer
);
1324 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1330 /* /snapshot_outputs */
1331 ret
= config_writer_close_element(writer
);
1333 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1345 int save_session_output(struct config_writer
*writer
,
1346 struct ltt_session
*session
)
1353 if ((session
->snapshot_mode
&& session
->snapshot
.nb_output
== 0) ||
1354 (!session
->snapshot_mode
&& !session
->consumer
)) {
1355 /* Session is in no output mode */
1360 ret
= config_writer_open_element(writer
, config_element_output
);
1362 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1366 if (session
->snapshot_mode
) {
1367 ret
= save_snapshot_outputs(writer
, &session
->snapshot
);
1372 if (session
->consumer
) {
1373 ret
= save_consumer_output(writer
, session
->consumer
);
1381 ret
= config_writer_close_element(writer
);
1383 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1391 * Save the given session.
1393 * Return 0 on success else a LTTNG_ERR* code.
1396 int save_session(struct ltt_session
*session
,
1397 struct lttng_save_session_attr
*attr
, lttng_sock_cred
*creds
)
1400 unsigned int file_opened
= 0; /* Indicate if the file has been opened */
1401 char config_file_path
[PATH_MAX
];
1403 struct config_writer
*writer
= NULL
;
1404 size_t session_name_len
;
1405 const char *provided_path
;
1411 session_name_len
= strlen(session
->name
);
1412 memset(config_file_path
, 0, sizeof(config_file_path
));
1414 if (!session_access_ok(session
,
1415 LTTNG_SOCK_GET_UID_CRED(creds
),
1416 LTTNG_SOCK_GET_GID_CRED(creds
))) {
1417 ret
= LTTNG_ERR_EPERM
;
1421 provided_path
= lttng_save_session_attr_get_output_url(attr
);
1422 if (provided_path
) {
1423 DBG3("Save session in provided path %s", provided_path
);
1424 len
= strlen(provided_path
);
1425 if (len
>= sizeof(config_file_path
)) {
1426 ret
= LTTNG_ERR_SET_URL
;
1429 strncpy(config_file_path
, provided_path
, len
);
1432 char *home_dir
= utils_get_user_home_dir(
1433 LTTNG_SOCK_GET_UID_CRED(creds
));
1435 ret
= LTTNG_ERR_SET_URL
;
1439 ret_len
= snprintf(config_file_path
, sizeof(config_file_path
),
1440 DEFAULT_SESSION_HOME_CONFIGPATH
, home_dir
);
1443 PERROR("snprintf save session");
1444 ret
= LTTNG_ERR_SET_URL
;
1451 * Check the path fits in the config file path dst including the '/'
1452 * followed by trailing .lttng extension and the NULL terminated string.
1454 if ((len
+ session_name_len
+ 2 +
1455 sizeof(DEFAULT_SESSION_CONFIG_FILE_EXTENSION
))
1456 > sizeof(config_file_path
)) {
1457 ret
= LTTNG_ERR_SET_URL
;
1461 ret
= run_as_mkdir_recursive(config_file_path
, S_IRWXU
| S_IRWXG
,
1462 LTTNG_SOCK_GET_UID_CRED(creds
), LTTNG_SOCK_GET_GID_CRED(creds
));
1464 ret
= LTTNG_ERR_SET_URL
;
1469 * At this point, we know that everything fits in the buffer. Validation
1470 * was done just above.
1472 config_file_path
[len
++] = '/';
1473 strncpy(config_file_path
+ len
, session
->name
, session_name_len
);
1474 len
+= session_name_len
;
1475 strcpy(config_file_path
+ len
, DEFAULT_SESSION_CONFIG_FILE_EXTENSION
);
1476 len
+= sizeof(DEFAULT_SESSION_CONFIG_FILE_EXTENSION
);
1477 config_file_path
[len
] = '\0';
1479 if (!access(config_file_path
, F_OK
) && !attr
->overwrite
) {
1480 /* File exists, notify the user since the overwrite flag is off. */
1481 ret
= LTTNG_ERR_SAVE_FILE_EXIST
;
1485 fd
= run_as_open(config_file_path
, O_CREAT
| O_WRONLY
| O_TRUNC
,
1486 S_IRUSR
| S_IWUSR
| S_IRGRP
| S_IWGRP
,
1487 LTTNG_SOCK_GET_UID_CRED(creds
), LTTNG_SOCK_GET_GID_CRED(creds
));
1489 PERROR("Could not create configuration file");
1490 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1495 writer
= config_writer_create(fd
);
1497 ret
= LTTNG_ERR_NOMEM
;
1501 ret
= config_writer_open_element(writer
, config_element_sessions
);
1503 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1507 ret
= config_writer_open_element(writer
, config_element_session
);
1509 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1513 ret
= config_writer_write_element_string(writer
, config_element_name
,
1516 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1520 ret
= save_domains(writer
, session
);
1525 ret
= config_writer_write_element_bool(writer
, config_element_started
,
1528 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1532 if (session
->snapshot_mode
|| session
->live_timer
) {
1533 ret
= config_writer_open_element(writer
, config_element_attributes
);
1535 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1539 if (session
->snapshot_mode
) {
1540 ret
= config_writer_write_element_bool(writer
,
1541 config_element_snapshot_mode
, 1);
1543 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1547 ret
= config_writer_write_element_signed_int(writer
,
1548 config_element_live_timer_interval
, session
->live_timer
);
1550 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1556 ret
= config_writer_close_element(writer
);
1558 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1563 ret
= save_session_output(writer
, session
);
1569 ret
= config_writer_close_element(writer
);
1571 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1576 ret
= config_writer_close_element(writer
);
1578 ret
= LTTNG_ERR_SAVE_IO_FAIL
;
1582 if (writer
&& config_writer_destroy(writer
)) {
1583 /* Preserve the original error code */
1584 ret
= ret
? ret
: LTTNG_ERR_SAVE_IO_FAIL
;
1587 /* Delete file in case of error */
1588 if (file_opened
&& unlink(config_file_path
)) {
1589 PERROR("Unlinking XML session configuration.");
1596 int cmd_save_sessions(struct lttng_save_session_attr
*attr
,
1597 lttng_sock_cred
*creds
)
1600 const char *session_name
;
1601 struct ltt_session
*session
;
1603 session_lock_list();
1605 session_name
= lttng_save_session_attr_get_session_name(attr
);
1607 session
= session_find_by_name(session_name
);
1609 ret
= LTTNG_ERR_SESS_NOT_FOUND
;
1613 session_lock(session
);
1614 ret
= save_session(session
, attr
, creds
);
1615 session_unlock(session
);
1620 struct ltt_session_list
*list
= session_get_list();
1622 cds_list_for_each_entry(session
, &list
->head
, list
) {
1623 session_lock(session
);
1624 ret
= save_session(session
, attr
, creds
);
1625 session_unlock(session
);
1627 /* Don't abort if we don't have the required permissions. */
1628 if (ret
&& ret
!= LTTNG_ERR_EPERM
) {
1636 session_unlock_list();