2 * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
3 * Copyright (C) 2016 - Jérémie Galarneau <jeremie.galarneau@efficios.com>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License, version 2 only,
7 * as published by the Free Software Foundation.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
19 #ifndef _LTT_UST_APP_H
20 #define _LTT_UST_APP_H
24 #include <common/compat/uuid.h>
26 #include "trace-ust.h"
27 #include "ust-registry.h"
30 #define UST_APP_EVENT_LIST_SIZE 32
32 /* Process name (short). */
33 #define UST_APP_PROCNAME_LEN 16
35 struct lttng_filter_bytecode
;
36 struct lttng_ust_filter_bytecode
;
38 extern int ust_consumerd64_fd
, ust_consumerd32_fd
;
41 * Object used to close the notify socket in a call_rcu(). Since the
42 * application might not be found, we need an independant object containing the
45 struct ust_app_notify_sock_obj
{
50 struct ust_app_ht_key
{
52 const struct lttng_filter_bytecode
*filter
;
53 enum lttng_ust_loglevel_type loglevel_type
;
54 const struct lttng_event_exclusion
*exclusion
;
58 * Application registration data structure.
60 struct ust_register_msg
{
61 enum ustctl_socket_type type
;
70 uint32_t bits_per_long
;
71 uint32_t uint8_t_alignment
;
72 uint32_t uint16_t_alignment
;
73 uint32_t uint32_t_alignment
;
74 uint32_t uint64_t_alignment
;
75 uint32_t long_alignment
;
76 int byte_order
; /* BIG_ENDIAN or LITTLE_ENDIAN */
77 char name
[LTTNG_UST_ABI_PROCNAME_LEN
];
81 * Global applications HT used by the session daemon. This table is indexed by
82 * PID using the pid_n node and pid value of an ust_app.
84 struct lttng_ht
*ust_app_ht
;
87 * Global applications HT used by the session daemon. This table is indexed by
88 * socket using the sock_n node and sock value of an ust_app.
90 * The 'sock' in question here is the 'command' socket.
92 struct lttng_ht
*ust_app_ht_by_sock
;
95 * Global applications HT used by the session daemon. This table is indexed by
96 * socket using the notify_sock_n node and notify_sock value of an ust_app.
98 struct lttng_ht
*ust_app_ht_by_notify_sock
;
100 /* Stream list containing ust_app_stream. */
101 struct ust_app_stream_list
{
103 struct cds_list_head head
;
108 struct lttng_ust_context_attr ctx
;
109 struct lttng_ust_object_data
*obj
;
110 struct lttng_ht_node_ulong node
;
111 struct cds_list_head list
;
114 struct ust_app_event
{
117 struct lttng_ust_object_data
*obj
;
118 struct lttng_ust_event attr
;
119 char name
[LTTNG_UST_SYM_NAME_LEN
];
120 struct lttng_ht_node_str node
;
121 struct lttng_filter_bytecode
*filter
;
122 struct lttng_event_exclusion
*exclusion
;
125 struct ust_app_stream
{
127 char pathname
[PATH_MAX
];
128 /* Format is %s_%d respectively channel name and CPU number. */
129 char name
[DEFAULT_STREAM_NAME_LEN
];
130 struct lttng_ust_object_data
*obj
;
131 /* Using a list of streams to keep order. */
132 struct cds_list_head list
;
135 struct ust_app_channel
{
138 /* Channel and streams were sent to the UST tracer. */
141 * Unique key used to identify the channel on the consumer side.
142 * 0 is a reserved 'invalid' value used to indicate that the consumer
143 * does not know about this channel (i.e. an error occurred).
146 /* Id of the tracing channel set on creation. */
147 uint64_t tracing_channel_id
;
148 /* Number of stream that this channel is expected to receive. */
149 unsigned int expected_stream_count
;
150 char name
[LTTNG_UST_SYM_NAME_LEN
];
151 struct lttng_ust_object_data
*obj
;
152 struct ustctl_consumer_channel_attr attr
;
153 struct ust_app_stream_list streams
;
154 /* Session pointer that owns this object. */
155 struct ust_app_session
*session
;
157 * Contexts are kept in a hash table for fast lookup and in an ordered list
158 * so we are able to enable them on the tracer side in the same order the
161 struct lttng_ht
*ctx
;
162 struct cds_list_head ctx_list
;
164 struct lttng_ht
*events
;
165 uint64_t tracefile_size
;
166 uint64_t tracefile_count
;
167 uint64_t monitor_timer_interval
;
169 * Node indexed by channel name in the channels' hash table of a session.
171 struct lttng_ht_node_str node
;
173 * Node indexed by UST channel object descriptor (handle). Stored in the
174 * ust_objd hash table in the ust_app object.
176 struct lttng_ht_node_ulong ust_objd_node
;
177 /* For delayed reclaim */
178 struct rcu_head rcu_head
;
181 struct ust_app_session
{
183 * Lock protecting this session's ust app interaction. Held
184 * across command send/recv to/from app. Never nests within the
185 * session registry lock.
187 pthread_mutex_t lock
;
190 /* started: has the session been in started state at any time ? */
191 int started
; /* allows detection of start vs restart. */
192 int handle
; /* used has unique identifier for app session */
194 bool deleted
; /* Session deleted flag. Check with lock held. */
197 * Tracing session ID. Multiple ust app session can have the same tracing
198 * session id making this value NOT unique to the object.
201 uint64_t id
; /* Unique session identifier */
202 struct lttng_ht
*channels
; /* Registered channels */
203 struct lttng_ht_node_u64 node
;
205 * Node indexed by UST session object descriptor (handle). Stored in the
206 * ust_sessions_objd hash table in the ust_app object.
208 struct lttng_ht_node_ulong ust_objd_node
;
209 /* Starts with 'ust'; no leading slash. */
211 /* UID/GID of the application owning the session */
212 struct lttng_credentials real_credentials
;
213 /* Effective UID and GID. Same as the tracing session. */
214 struct lttng_credentials effective_credentials
;
215 struct cds_list_head teardown_node
;
217 * Once at least *one* session is created onto the application, the
218 * corresponding consumer is set so we can use it on unregistration.
220 struct consumer_output
*consumer
;
221 enum lttng_buffer_type buffer_type
;
222 /* ABI of the session. Same value as the application. */
223 uint32_t bits_per_long
;
224 /* For delayed reclaim */
225 struct rcu_head rcu_head
;
226 /* If the channel's streams have to be outputed or not. */
227 unsigned int output_traces
;
228 unsigned int live_timer_interval
; /* usec */
230 /* Metadata channel attributes. */
231 struct ustctl_consumer_channel_attr metadata_attr
;
233 char root_shm_path
[PATH_MAX
];
234 char shm_path
[PATH_MAX
];
238 * Registered traceable applications. Libust registers to the session daemon
239 * and a linked list is kept of all running traceable app.
243 pthread_mutex_t sock_lock
; /* Protects sock protocol. */
248 uid_t uid
; /* User ID that owns the apps */
249 gid_t gid
; /* Group ID that owns the apps */
252 uint32_t bits_per_long
;
253 uint32_t uint8_t_alignment
;
254 uint32_t uint16_t_alignment
;
255 uint32_t uint32_t_alignment
;
256 uint32_t uint64_t_alignment
;
257 uint32_t long_alignment
;
258 int byte_order
; /* BIG_ENDIAN or LITTLE_ENDIAN */
260 int compatible
; /* If the lttng-ust tracer version does not match the
261 supported version of the session daemon, this flag is
262 set to 0 (NOT compatible) else 1. */
263 struct lttng_ust_tracer_version version
;
264 uint32_t v_major
; /* Version major number */
265 uint32_t v_minor
; /* Version minor number */
266 /* Extra for the NULL byte. */
267 char name
[UST_APP_PROCNAME_LEN
+ 1];
268 /* Type of buffer this application uses. */
269 enum lttng_buffer_type buffer_type
;
270 struct lttng_ht
*sessions
;
271 struct lttng_ht_node_ulong pid_n
;
272 struct lttng_ht_node_ulong sock_n
;
273 struct lttng_ht_node_ulong notify_sock_n
;
275 * This is a list of ust app session that, once the app is going into
276 * teardown mode, in the RCU call, each node in this list is removed and
279 * Element of the list are added when an application unregisters after each
280 * ht_del of ust_app_session associated to this app. This list is NOT used
281 * when a session is destroyed.
283 struct cds_list_head teardown_head
;
285 * Hash table containing ust_app_channel indexed by channel objd.
287 struct lttng_ht
*ust_objd
;
289 * Hash table containing ust_app_session indexed by objd.
291 struct lttng_ht
*ust_sessions_objd
;
294 * If this application is of the agent domain and this is non negative then
295 * a lookup MUST be done to acquire a read side reference to the
296 * corresponding agent app object. If the lookup fails, this should be set
297 * to a negative value indicating that the agent application is gone.
302 #ifdef HAVE_LIBLTTNG_UST_CTL
304 int ust_app_register(struct ust_register_msg
*msg
, int sock
);
305 int ust_app_register_done(struct ust_app
*app
);
306 int ust_app_version(struct ust_app
*app
);
307 void ust_app_unregister(int sock
);
308 int ust_app_start_trace_all(struct ltt_ust_session
*usess
);
309 int ust_app_stop_trace_all(struct ltt_ust_session
*usess
);
310 int ust_app_destroy_trace_all(struct ltt_ust_session
*usess
);
311 int ust_app_list_events(struct lttng_event
**events
);
312 int ust_app_list_event_fields(struct lttng_event_field
**fields
);
313 int ust_app_create_channel_glb(struct ltt_ust_session
*usess
,
314 struct ltt_ust_channel
*uchan
);
315 int ust_app_create_event_glb(struct ltt_ust_session
*usess
,
316 struct ltt_ust_channel
*uchan
, struct ltt_ust_event
*uevent
);
317 int ust_app_disable_channel_glb(struct ltt_ust_session
*usess
,
318 struct ltt_ust_channel
*uchan
);
319 int ust_app_enable_channel_glb(struct ltt_ust_session
*usess
,
320 struct ltt_ust_channel
*uchan
);
321 int ust_app_enable_event_glb(struct ltt_ust_session
*usess
,
322 struct ltt_ust_channel
*uchan
, struct ltt_ust_event
*uevent
);
323 int ust_app_disable_event_glb(struct ltt_ust_session
*usess
,
324 struct ltt_ust_channel
*uchan
, struct ltt_ust_event
*uevent
);
325 int ust_app_add_ctx_channel_glb(struct ltt_ust_session
*usess
,
326 struct ltt_ust_channel
*uchan
, struct ltt_ust_context
*uctx
);
327 void ust_app_global_update(struct ltt_ust_session
*usess
, struct ust_app
*app
);
328 void ust_app_global_update_all(struct ltt_ust_session
*usess
);
330 void ust_app_clean_list(void);
331 int ust_app_ht_alloc(void);
332 struct ust_app
*ust_app_find_by_pid(pid_t pid
);
333 struct ust_app_stream
*ust_app_alloc_stream(void);
334 int ust_app_recv_registration(int sock
, struct ust_register_msg
*msg
);
335 int ust_app_recv_notify(int sock
);
336 void ust_app_add(struct ust_app
*app
);
337 struct ust_app
*ust_app_create(struct ust_register_msg
*msg
, int sock
);
338 void ust_app_notify_sock_unregister(int sock
);
339 ssize_t
ust_app_push_metadata(struct ust_registry_session
*registry
,
340 struct consumer_socket
*socket
, int send_zero_data
);
341 void ust_app_destroy(struct ust_app
*app
);
342 enum lttng_error_code
ust_app_snapshot_record(
343 const struct ltt_ust_session
*usess
,
344 const struct snapshot_output
*output
, int wait
,
345 uint64_t nb_packets_per_stream
);
346 uint64_t ust_app_get_size_one_more_packet_per_stream(
347 const struct ltt_ust_session
*usess
, uint64_t cur_nr_packets
);
348 struct ust_app
*ust_app_find_by_sock(int sock
);
349 int ust_app_uid_get_channel_runtime_stats(uint64_t ust_session_id
,
350 struct cds_list_head
*buffer_reg_uid_list
,
351 struct consumer_output
*consumer
, uint64_t uchan_id
,
352 int overwrite
, uint64_t *discarded
, uint64_t *lost
);
353 int ust_app_pid_get_channel_runtime_stats(struct ltt_ust_session
*usess
,
354 struct ltt_ust_channel
*uchan
,
355 struct consumer_output
*consumer
,
356 int overwrite
, uint64_t *discarded
, uint64_t *lost
);
357 int ust_app_regenerate_statedump_all(struct ltt_ust_session
*usess
);
358 enum lttng_error_code
ust_app_rotate_session(struct ltt_session
*session
);
359 enum lttng_error_code
ust_app_create_channel_subdirectories(
360 const struct ltt_ust_session
*session
);
363 int ust_app_supported(void)
368 #else /* HAVE_LIBLTTNG_UST_CTL */
371 int ust_app_destroy_trace_all(struct ltt_ust_session
*usess
)
376 int ust_app_start_trace(struct ltt_ust_session
*usess
, struct ust_app
*app
)
381 int ust_app_start_trace_all(struct ltt_ust_session
*usess
)
386 int ust_app_stop_trace_all(struct ltt_ust_session
*usess
)
391 int ust_app_list_events(struct lttng_event
**events
)
396 int ust_app_list_event_fields(struct lttng_event_field
**fields
)
401 int ust_app_register(struct ust_register_msg
*msg
, int sock
)
406 int ust_app_register_done(struct ust_app
*app
)
411 int ust_app_version(struct ust_app
*app
)
416 void ust_app_unregister(int sock
)
420 void ust_app_lock_list(void)
424 void ust_app_unlock_list(void)
428 void ust_app_clean_list(void)
432 struct ust_app_list
*ust_app_get_list(void)
437 struct ust_app
*ust_app_get_by_pid(pid_t pid
)
442 int ust_app_ht_alloc(void)
447 void ust_app_global_update(struct ltt_ust_session
*usess
, struct ust_app
*app
)
450 int ust_app_disable_channel_glb(struct ltt_ust_session
*usess
,
451 struct ltt_ust_channel
*uchan
)
456 int ust_app_enable_channel_glb(struct ltt_ust_session
*usess
,
457 struct ltt_ust_channel
*uchan
)
462 int ust_app_create_channel_glb(struct ltt_ust_session
*usess
,
463 struct ltt_ust_channel
*uchan
)
468 int ust_app_create_event_glb(struct ltt_ust_session
*usess
,
469 struct ltt_ust_channel
*uchan
, struct ltt_ust_event
*uevent
)
474 int ust_app_disable_event_glb(struct ltt_ust_session
*usess
,
475 struct ltt_ust_channel
*uchan
, struct ltt_ust_event
*uevent
)
480 int ust_app_enable_event_glb(struct ltt_ust_session
*usess
,
481 struct ltt_ust_channel
*uchan
, struct ltt_ust_event
*uevent
)
486 int ust_app_add_ctx_channel_glb(struct ltt_ust_session
*usess
,
487 struct ltt_ust_channel
*uchan
, struct ltt_ust_context
*uctx
)
492 int ust_app_enable_event_pid(struct ltt_ust_session
*usess
,
493 struct ltt_ust_channel
*uchan
, struct ltt_ust_event
*uevent
,
499 int ust_app_recv_registration(int sock
, struct ust_register_msg
*msg
)
504 int ust_app_recv_notify(int sock
)
509 struct ust_app
*ust_app_create(struct ust_register_msg
*msg
, int sock
)
514 void ust_app_add(struct ust_app
*app
)
518 void ust_app_notify_sock_unregister(int sock
)
522 ssize_t
ust_app_push_metadata(struct ust_registry_session
*registry
,
523 struct consumer_socket
*socket
, int send_zero_data
)
528 void ust_app_destroy(struct ust_app
*app
)
533 enum lttng_error_code
ust_app_snapshot_record(struct ltt_ust_session
*usess
,
534 struct snapshot_output
*output
, int wait
, uint64_t max_stream_size
)
539 unsigned int ust_app_get_nb_stream(struct ltt_ust_session
*usess
)
545 int ust_app_supported(void)
550 struct ust_app
*ust_app_find_by_sock(int sock
)
555 struct ust_app
*ust_app_find_by_pid(pid_t pid
)
560 uint64_t ust_app_get_size_one_more_packet_per_stream(
561 struct ltt_ust_session
*usess
, uint64_t cur_nr_packets
) {
565 int ust_app_uid_get_channel_runtime_stats(uint64_t ust_session_id
,
566 struct cds_list_head
*buffer_reg_uid_list
,
567 struct consumer_output
*consumer
, int overwrite
,
568 uint64_t uchan_id
, uint64_t *discarded
, uint64_t *lost
)
574 int ust_app_pid_get_channel_runtime_stats(struct ltt_ust_session
*usess
,
575 struct ltt_ust_channel
*uchan
,
576 struct consumer_output
*consumer
,
577 int overwrite
, uint64_t *discarded
, uint64_t *lost
)
583 int ust_app_regenerate_statedump_all(struct ltt_ust_session
*usess
)
589 enum lttng_error_code
ust_app_rotate_session(struct ltt_session
*session
)
595 enum lttng_error_code
ust_app_create_channel_subdirectories(
596 const struct ltt_ust_session
*session
)
601 #endif /* HAVE_LIBLTTNG_UST_CTL */
603 #endif /* _LTT_UST_APP_H */