4 * Copyright 2010 (c) - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
6 * Holds LTTng per-session event registry.
8 * Dual LGPL v2.1/GPL v2 license.
14 #include <urcu/list.h>
15 #include <urcu/hlist.h>
18 #include <urcu/compiler.h>
19 #include <urcu/uatomic.h>
20 #include <uuid/uuid.h>
21 #include <ust/tracepoint.h>
25 #include <ust/lttng-events.h>
26 #include <ust/usterr-signal-safe.h>
28 #include "ltt-tracer.h"
29 #include "ltt-tracer-core.h"
31 #include "../libringbuffer/shm.h"
34 #include <ust/kcompat/jhash.h>
37 * The sessions mutex is the centralized mutex across UST tracing
38 * control and probe registration. All operations within this file are
39 * called by the communication thread, under ust_lock protection.
41 static DEFINE_MUTEX(sessions_mutex
);
45 pthread_mutex_lock(&sessions_mutex
);
50 pthread_mutex_unlock(&sessions_mutex
);
53 static CDS_LIST_HEAD(sessions
);
54 static CDS_LIST_HEAD(ltt_transport_list
);
57 * Pending probes hash table, containing the registered ltt events for
58 * which tracepoint probes are still missing. Protected by the sessions
61 #define PENDING_PROBE_HASH_BITS 6
62 #define PENDING_PROBE_HASH_SIZE (1 << PENDING_PROBE_HASH_BITS)
63 static struct cds_hlist_head pending_probe_table
[PENDING_PROBE_HASH_SIZE
];
65 struct ust_pending_probe
{
66 struct ltt_event
*event
;
67 struct cds_hlist_node node
;
71 static void _ltt_event_destroy(struct ltt_event
*event
);
72 static void _ltt_channel_destroy(struct ltt_channel
*chan
);
73 static int _ltt_event_unregister(struct ltt_event
*event
);
75 int _ltt_event_metadata_statedump(struct ltt_session
*session
,
76 struct ltt_channel
*chan
,
77 struct ltt_event
*event
);
79 int _ltt_session_metadata_statedump(struct ltt_session
*session
);
82 * called at event creation if probe is missing.
83 * called with session mutex held.
86 int add_pending_probe(struct ltt_event
*event
, const char *name
)
88 struct cds_hlist_head
*head
;
89 struct ust_pending_probe
*e
;
90 size_t name_len
= strlen(name
) + 1;
91 u32 hash
= jhash(name
, name_len
- 1, 0);
93 head
= &pending_probe_table
[hash
& (PENDING_PROBE_HASH_SIZE
- 1)];
94 e
= zmalloc(sizeof(struct ust_pending_probe
) + name_len
);
97 memcpy(&e
->name
[0], name
, name_len
);
98 cds_hlist_add_head(&e
->node
, head
);
100 event
->pending_probe
= e
;
105 * remove a pending probe. called when at event teardown and when an
106 * event is fixed (probe is loaded).
107 * called with session mutex held.
110 void remove_pending_probe(struct ust_pending_probe
*e
)
114 cds_hlist_del(&e
->node
);
119 * Called at library load: connect the probe on the events pending on
121 * called with session mutex held.
123 int pending_probe_fix_events(const struct lttng_event_desc
*desc
)
125 struct cds_hlist_head
*head
;
126 struct cds_hlist_node
*node
, *p
;
127 struct ust_pending_probe
*e
;
128 const char *name
= desc
->name
;
129 size_t name_len
= strlen(name
) + 1;
130 u32 hash
= jhash(name
, name_len
- 1, 0);
133 head
= &pending_probe_table
[hash
& (PENDING_PROBE_HASH_SIZE
- 1)];
134 cds_hlist_for_each_entry_safe(e
, node
, p
, head
, node
) {
135 struct ltt_event
*event
;
136 struct ltt_channel
*chan
;
138 if (strcmp(name
, e
->name
))
142 assert(!event
->desc
);
144 event
->pending_probe
= NULL
;
145 remove_pending_probe(e
);
146 ret
|= __tracepoint_probe_register(name
,
147 event
->desc
->probe_callback
,
149 ret
|= _ltt_event_metadata_statedump(chan
->session
, chan
,
155 void synchronize_trace(void)
160 struct ltt_session
*ltt_session_create(void)
162 struct ltt_session
*session
;
164 session
= zmalloc(sizeof(struct ltt_session
));
167 CDS_INIT_LIST_HEAD(&session
->chan
);
168 CDS_INIT_LIST_HEAD(&session
->events
);
169 uuid_generate(session
->uuid
);
170 cds_list_add(&session
->list
, &sessions
);
174 void ltt_session_destroy(struct ltt_session
*session
)
176 struct ltt_channel
*chan
, *tmpchan
;
177 struct ltt_event
*event
, *tmpevent
;
180 CMM_ACCESS_ONCE(session
->active
) = 0;
181 cds_list_for_each_entry(event
, &session
->events
, list
) {
182 ret
= _ltt_event_unregister(event
);
185 synchronize_trace(); /* Wait for in-flight events to complete */
186 cds_list_for_each_entry_safe(event
, tmpevent
, &session
->events
, list
)
187 _ltt_event_destroy(event
);
188 cds_list_for_each_entry_safe(chan
, tmpchan
, &session
->chan
, list
)
189 _ltt_channel_destroy(chan
);
190 cds_list_del(&session
->list
);
194 int ltt_session_enable(struct ltt_session
*session
)
197 struct ltt_channel
*chan
;
199 if (session
->active
) {
205 * Snapshot the number of events per channel to know the type of header
208 cds_list_for_each_entry(chan
, &session
->chan
, list
) {
209 if (chan
->header_type
)
210 continue; /* don't change it if session stop/restart */
211 if (chan
->free_event_id
< 31)
212 chan
->header_type
= 1; /* compact */
214 chan
->header_type
= 2; /* large */
217 CMM_ACCESS_ONCE(session
->active
) = 1;
218 CMM_ACCESS_ONCE(session
->been_active
) = 1;
219 ret
= _ltt_session_metadata_statedump(session
);
221 CMM_ACCESS_ONCE(session
->active
) = 0;
226 int ltt_session_disable(struct ltt_session
*session
)
230 if (!session
->active
) {
234 CMM_ACCESS_ONCE(session
->active
) = 0;
239 int ltt_channel_enable(struct ltt_channel
*channel
)
243 if (channel
== channel
->session
->metadata
)
245 old
= uatomic_xchg(&channel
->enabled
, 1);
251 int ltt_channel_disable(struct ltt_channel
*channel
)
255 if (channel
== channel
->session
->metadata
)
257 old
= uatomic_xchg(&channel
->enabled
, 0);
263 int ltt_event_enable(struct ltt_event
*event
)
267 if (event
->chan
== event
->chan
->session
->metadata
)
269 old
= uatomic_xchg(&event
->enabled
, 1);
275 int ltt_event_disable(struct ltt_event
*event
)
279 if (event
->chan
== event
->chan
->session
->metadata
)
281 old
= uatomic_xchg(&event
->enabled
, 0);
287 static struct ltt_transport
*ltt_transport_find(const char *name
)
289 struct ltt_transport
*transport
;
291 cds_list_for_each_entry(transport
, <t_transport_list
, node
) {
292 if (!strcmp(transport
->name
, name
))
298 struct ltt_channel
*ltt_channel_create(struct ltt_session
*session
,
299 const char *transport_name
,
301 size_t subbuf_size
, size_t num_subbuf
,
302 unsigned int switch_timer_interval
,
303 unsigned int read_timer_interval
,
304 int *shm_fd
, int *wait_fd
,
305 uint64_t *memory_map_size
)
307 struct ltt_channel
*chan
;
308 struct ltt_transport
*transport
;
310 if (session
->been_active
)
311 goto active
; /* Refuse to add channel to active session */
312 transport
= ltt_transport_find(transport_name
);
314 DBG("LTTng transport %s not found\n",
318 chan
= zmalloc(sizeof(struct ltt_channel
));
321 chan
->session
= session
;
322 chan
->id
= session
->free_chan_id
++;
324 * Note: the channel creation op already writes into the packet
325 * headers. Therefore the "chan" information used as input
326 * should be already accessible.
328 transport
->ops
.channel_create("[lttng]", chan
, buf_addr
,
329 subbuf_size
, num_subbuf
, switch_timer_interval
,
330 read_timer_interval
, shm_fd
, wait_fd
,
335 chan
->ops
= &transport
->ops
;
336 cds_list_add(&chan
->list
, &session
->chan
);
348 * Only used internally at session destruction.
351 void _ltt_channel_destroy(struct ltt_channel
*chan
)
353 chan
->ops
->channel_destroy(chan
);
354 cds_list_del(&chan
->list
);
355 lttng_destroy_context(chan
->ctx
);
360 * Supports event creation while tracing session is active.
362 struct ltt_event
*ltt_event_create(struct ltt_channel
*chan
,
363 struct lttng_ust_event
*event_param
,
366 struct ltt_event
*event
;
369 if (chan
->used_event_id
== -1UL)
372 * This is O(n^2) (for each event, the loop is called at event
373 * creation). Might require a hash if we have lots of events.
375 cds_list_for_each_entry(event
, &chan
->session
->events
, list
)
376 if (event
->desc
&& !strcmp(event
->desc
->name
, event_param
->name
))
378 event
= zmalloc(sizeof(struct ltt_event
));
382 event
->filter
= filter
;
384 * used_event_id counts the maximum number of event IDs that can
385 * register if all probes register.
387 chan
->used_event_id
++;
389 event
->instrumentation
= event_param
->instrumentation
;
390 /* Populate ltt_event structure before tracepoint registration. */
392 switch (event_param
->instrumentation
) {
393 case LTTNG_UST_TRACEPOINT
:
394 event
->desc
= ltt_event_get(event_param
->name
);
396 ret
= __tracepoint_probe_register(event_param
->name
,
397 event
->desc
->probe_callback
,
401 event
->id
= chan
->free_event_id
++;
404 * If the probe is not present, event->desc stays NULL,
405 * waiting for the probe to register, and the event->id
408 ret
= add_pending_probe(event
, event_param
->name
);
410 goto add_pending_error
;
417 ret
= _ltt_event_metadata_statedump(chan
->session
, chan
, event
);
419 goto statedump_error
;
421 cds_list_add(&event
->list
, &chan
->session
->events
);
426 WARN_ON_ONCE(__tracepoint_probe_unregister(event_param
->name
,
427 event
->desc
->probe_callback
,
429 ltt_event_put(event
->desc
);
441 * Only used internally at session destruction.
443 int _ltt_event_unregister(struct ltt_event
*event
)
447 switch (event
->instrumentation
) {
448 case LTTNG_UST_TRACEPOINT
:
450 ret
= __tracepoint_probe_unregister(event
->desc
->name
,
451 event
->desc
->probe_callback
,
456 remove_pending_probe(event
->pending_probe
);
467 * Only used internally at session destruction.
470 void _ltt_event_destroy(struct ltt_event
*event
)
472 switch (event
->instrumentation
) {
473 case LTTNG_UST_TRACEPOINT
:
475 ltt_event_put(event
->desc
);
481 cds_list_del(&event
->list
);
482 lttng_destroy_context(event
->ctx
);
487 * We have exclusive access to our metadata buffer (protected by the
488 * ust_lock), so we can do racy operations such as looking for
489 * remaining space left in packet and write, since mutual exclusion
490 * protects us from concurrent writes.
492 int lttng_metadata_printf(struct ltt_session
*session
,
493 const char *fmt
, ...)
495 struct lib_ring_buffer_ctx ctx
;
496 struct ltt_channel
*chan
= session
->metadata
;
498 int ret
= 0, waitret
;
499 size_t len
, reserve_len
, pos
;
502 WARN_ON_ONCE(!CMM_ACCESS_ONCE(session
->active
));
505 ret
= vasprintf(&str
, fmt
, ap
);
513 for (pos
= 0; pos
< len
; pos
+= reserve_len
) {
514 reserve_len
= min_t(size_t,
515 chan
->ops
->packet_avail_size(chan
->chan
, chan
->handle
),
517 lib_ring_buffer_ctx_init(&ctx
, chan
->chan
, NULL
, reserve_len
,
518 sizeof(char), -1, chan
->handle
);
520 * We don't care about metadata buffer's records lost
521 * count, because we always retry here. Report error if
522 * we need to bail out after timeout or being
525 waitret
= wait_cond_interruptible_timeout(
527 ret
= chan
->ops
->event_reserve(&ctx
, 0);
528 ret
!= -ENOBUFS
|| !ret
;
530 LTTNG_METADATA_TIMEOUT_MSEC
);
531 if (waitret
== -ETIMEDOUT
|| waitret
== -EINTR
|| ret
) {
532 DBG("LTTng: Failure to write metadata to buffers (%s)\n",
533 waitret
== -EINTR
? "interrupted" :
534 (ret
== -ENOBUFS
? "timeout" : "I/O error"));
535 if (waitret
== -EINTR
)
539 chan
->ops
->event_write(&ctx
, &str
[pos
], reserve_len
);
540 chan
->ops
->event_commit(&ctx
);
548 int _ltt_field_statedump(struct ltt_session
*session
,
549 const struct lttng_event_field
*field
)
553 switch (field
->type
.atype
) {
555 ret
= lttng_metadata_printf(session
,
556 " integer { size = %u; align = %u; signed = %u; encoding = %s; base = %u;%s } _%s;\n",
557 field
->type
.u
.basic
.integer
.size
,
558 field
->type
.u
.basic
.integer
.alignment
,
559 field
->type
.u
.basic
.integer
.signedness
,
560 (field
->type
.u
.basic
.integer
.encoding
== lttng_encode_none
)
562 : (field
->type
.u
.basic
.integer
.encoding
== lttng_encode_UTF8
)
565 field
->type
.u
.basic
.integer
.base
,
566 #if (BYTE_ORDER == BIG_ENDIAN)
567 field
->type
.u
.basic
.integer
.reverse_byte_order
? " byte_order = le;" : "",
569 field
->type
.u
.basic
.integer
.reverse_byte_order
? " byte_order = be;" : "",
574 ret
= lttng_metadata_printf(session
,
575 " floating_point { exp_dig = %u; mant_dig = %u; align = %u;%s } _%s;\n",
576 field
->type
.u
.basic
._float
.exp_dig
,
577 field
->type
.u
.basic
._float
.mant_dig
,
578 field
->type
.u
.basic
._float
.alignment
,
579 #if (BYTE_ORDER == BIG_ENDIAN)
580 field
->type
.u
.basic
.integer
.reverse_byte_order
? " byte_order = le;" : "",
582 field
->type
.u
.basic
.integer
.reverse_byte_order
? " byte_order = be;" : "",
587 ret
= lttng_metadata_printf(session
,
589 field
->type
.u
.basic
.enumeration
.name
,
594 const struct lttng_basic_type
*elem_type
;
596 elem_type
= &field
->type
.u
.array
.elem_type
;
597 ret
= lttng_metadata_printf(session
,
598 " integer { size = %u; align = %u; signed = %u; encoding = %s; base = %u;%s } _%s[%u];\n",
599 elem_type
->u
.basic
.integer
.size
,
600 elem_type
->u
.basic
.integer
.alignment
,
601 elem_type
->u
.basic
.integer
.signedness
,
602 (elem_type
->u
.basic
.integer
.encoding
== lttng_encode_none
)
604 : (elem_type
->u
.basic
.integer
.encoding
== lttng_encode_UTF8
)
607 elem_type
->u
.basic
.integer
.base
,
608 #if (BYTE_ORDER == BIG_ENDIAN)
609 elem_type
->u
.basic
.integer
.reverse_byte_order
? " byte_order = le;" : "",
611 elem_type
->u
.basic
.integer
.reverse_byte_order
? " byte_order = be;" : "",
613 field
->name
, field
->type
.u
.array
.length
);
618 const struct lttng_basic_type
*elem_type
;
619 const struct lttng_basic_type
*length_type
;
621 elem_type
= &field
->type
.u
.sequence
.elem_type
;
622 length_type
= &field
->type
.u
.sequence
.length_type
;
623 ret
= lttng_metadata_printf(session
,
624 " integer { size = %u; align = %u; signed = %u; encoding = %s; base = %u;%s } __%s_length;\n",
625 length_type
->u
.basic
.integer
.size
,
626 (unsigned int) length_type
->u
.basic
.integer
.alignment
,
627 length_type
->u
.basic
.integer
.signedness
,
628 (length_type
->u
.basic
.integer
.encoding
== lttng_encode_none
)
630 : ((length_type
->u
.basic
.integer
.encoding
== lttng_encode_UTF8
)
633 length_type
->u
.basic
.integer
.base
,
634 #if (BYTE_ORDER == BIG_ENDIAN)
635 length_type
->u
.basic
.integer
.reverse_byte_order
? " byte_order = le;" : "",
637 length_type
->u
.basic
.integer
.reverse_byte_order
? " byte_order = be;" : "",
643 ret
= lttng_metadata_printf(session
,
644 " integer { size = %u; align = %u; signed = %u; encoding = %s; base = %u;%s } _%s[ __%s_length ];\n",
645 elem_type
->u
.basic
.integer
.size
,
646 (unsigned int) elem_type
->u
.basic
.integer
.alignment
,
647 elem_type
->u
.basic
.integer
.signedness
,
648 (elem_type
->u
.basic
.integer
.encoding
== lttng_encode_none
)
650 : ((elem_type
->u
.basic
.integer
.encoding
== lttng_encode_UTF8
)
653 elem_type
->u
.basic
.integer
.base
,
654 #if (BYTE_ORDER == BIG_ENDIAN)
655 elem_type
->u
.basic
.integer
.reverse_byte_order
? " byte_order = le;" : "",
657 elem_type
->u
.basic
.integer
.reverse_byte_order
? " byte_order = be;" : "",
665 /* Default encoding is UTF8 */
666 ret
= lttng_metadata_printf(session
,
668 field
->type
.u
.basic
.string
.encoding
== lttng_encode_ASCII
?
669 " { encoding = ASCII; }" : "",
680 int _ltt_context_metadata_statedump(struct ltt_session
*session
,
681 struct lttng_ctx
*ctx
)
688 for (i
= 0; i
< ctx
->nr_fields
; i
++) {
689 const struct lttng_ctx_field
*field
= &ctx
->fields
[i
];
691 ret
= _ltt_field_statedump(session
, &field
->event_field
);
699 int _ltt_fields_metadata_statedump(struct ltt_session
*session
,
700 struct ltt_event
*event
)
702 const struct lttng_event_desc
*desc
= event
->desc
;
706 for (i
= 0; i
< desc
->nr_fields
; i
++) {
707 const struct lttng_event_field
*field
= &desc
->fields
[i
];
709 ret
= _ltt_field_statedump(session
, field
);
717 int _ltt_event_metadata_statedump(struct ltt_session
*session
,
718 struct ltt_channel
*chan
,
719 struct ltt_event
*event
)
723 if (event
->metadata_dumped
|| !CMM_ACCESS_ONCE(session
->active
))
725 if (chan
== session
->metadata
)
728 * Don't print events for which probe load is pending.
733 ret
= lttng_metadata_printf(session
,
737 " stream_id = %u;\n",
745 ret
= lttng_metadata_printf(session
,
746 " context := struct {\n");
750 ret
= _ltt_context_metadata_statedump(session
, event
->ctx
);
754 ret
= lttng_metadata_printf(session
,
760 ret
= lttng_metadata_printf(session
,
761 " fields := struct {\n"
766 ret
= _ltt_fields_metadata_statedump(session
, event
);
771 * LTTng space reservation can only reserve multiples of the
774 ret
= lttng_metadata_printf(session
,
780 event
->metadata_dumped
= 1;
787 int _ltt_channel_metadata_statedump(struct ltt_session
*session
,
788 struct ltt_channel
*chan
)
792 if (chan
->metadata_dumped
|| !CMM_ACCESS_ONCE(session
->active
))
794 if (chan
== session
->metadata
)
797 WARN_ON_ONCE(!chan
->header_type
);
798 ret
= lttng_metadata_printf(session
,
801 " event.header := %s;\n"
802 " packet.context := struct packet_context;\n",
804 chan
->header_type
== 1 ? "struct event_header_compact" :
805 "struct event_header_large");
810 ret
= lttng_metadata_printf(session
,
811 " event.context := struct {\n");
815 ret
= _ltt_context_metadata_statedump(session
, chan
->ctx
);
819 ret
= lttng_metadata_printf(session
,
825 ret
= lttng_metadata_printf(session
,
828 chan
->metadata_dumped
= 1;
834 int _ltt_stream_packet_context_declare(struct ltt_session
*session
)
836 return lttng_metadata_printf(session
,
837 "struct packet_context {\n"
838 " uint64_t timestamp_begin;\n"
839 " uint64_t timestamp_end;\n"
840 " uint32_t events_discarded;\n"
841 " uint32_t content_size;\n"
842 " uint32_t packet_size;\n"
843 " uint32_t cpu_id;\n"
851 * id 31 is reserved to indicate an extended header.
854 * id: range: 0 - 65534.
855 * id 65535 is reserved to indicate an extended header.
858 int _ltt_event_header_declare(struct ltt_session
*session
)
860 return lttng_metadata_printf(session
,
861 "struct event_header_compact {\n"
862 " enum : uint5_t { compact = 0 ... 30, extended = 31 } id;\n"
865 " uint27_t timestamp;\n"
869 " uint64_t timestamp;\n"
874 "struct event_header_large {\n"
875 " enum : uint16_t { compact = 0 ... 65534, extended = 65535 } id;\n"
878 " uint32_t timestamp;\n"
882 " uint64_t timestamp;\n"
886 lttng_alignof(uint32_t) * CHAR_BIT
,
887 lttng_alignof(uint16_t) * CHAR_BIT
892 * Output metadata into this session's metadata buffers.
895 int _ltt_session_metadata_statedump(struct ltt_session
*session
)
897 unsigned char *uuid_c
= session
->uuid
;
899 struct ltt_channel
*chan
;
900 struct ltt_event
*event
;
903 if (!CMM_ACCESS_ONCE(session
->active
))
905 if (session
->metadata_dumped
)
907 if (!session
->metadata
) {
908 DBG("LTTng: attempt to start tracing, but metadata channel is not found. Operation abort.\n");
912 snprintf(uuid_s
, sizeof(uuid_s
),
913 "%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x",
914 uuid_c
[0], uuid_c
[1], uuid_c
[2], uuid_c
[3],
915 uuid_c
[4], uuid_c
[5], uuid_c
[6], uuid_c
[7],
916 uuid_c
[8], uuid_c
[9], uuid_c
[10], uuid_c
[11],
917 uuid_c
[12], uuid_c
[13], uuid_c
[14], uuid_c
[15]);
919 ret
= lttng_metadata_printf(session
,
920 "typealias integer { size = 8; align = %u; signed = false; } := uint8_t;\n"
921 "typealias integer { size = 16; align = %u; signed = false; } := uint16_t;\n"
922 "typealias integer { size = 32; align = %u; signed = false; } := uint32_t;\n"
923 "typealias integer { size = 64; align = %u; signed = false; } := uint64_t;\n"
924 "typealias integer { size = 5; align = 1; signed = false; } := uint5_t;\n"
925 "typealias integer { size = 27; align = 1; signed = false; } := uint27_t;\n"
931 " byte_order = %s;\n"
932 " packet.header := struct {\n"
934 " uint8_t uuid[16];\n"
935 " uint32_t stream_id;\n"
938 lttng_alignof(uint8_t) * CHAR_BIT
,
939 lttng_alignof(uint16_t) * CHAR_BIT
,
940 lttng_alignof(uint32_t) * CHAR_BIT
,
941 lttng_alignof(uint64_t) * CHAR_BIT
,
945 #if (BYTE_ORDER == BIG_ENDIAN)
954 ret
= _ltt_stream_packet_context_declare(session
);
958 ret
= _ltt_event_header_declare(session
);
963 cds_list_for_each_entry(chan
, &session
->chan
, list
) {
964 ret
= _ltt_channel_metadata_statedump(session
, chan
);
969 cds_list_for_each_entry(event
, &session
->events
, list
) {
970 ret
= _ltt_event_metadata_statedump(session
, event
->chan
, event
);
974 session
->metadata_dumped
= 1;
980 * ltt_transport_register - LTT transport registration
981 * @transport: transport structure
983 * Registers a transport which can be used as output to extract the data out of
984 * LTTng. Called with ust_lock held.
986 void ltt_transport_register(struct ltt_transport
*transport
)
988 cds_list_add_tail(&transport
->node
, <t_transport_list
);
992 * ltt_transport_unregister - LTT transport unregistration
993 * @transport: transport structure
994 * Called with ust_lock held.
996 void ltt_transport_unregister(struct ltt_transport
*transport
)
998 cds_list_del(&transport
->node
);
1001 void ltt_events_exit(void)
1003 struct ltt_session
*session
, *tmpsession
;
1005 cds_list_for_each_entry_safe(session
, tmpsession
, &sessions
, list
)
1006 ltt_session_destroy(session
);