Clean-up: sessiond: change spaces to tab
[lttng-tools.git] / src / bin / lttng-sessiond / ust-app.h
CommitLineData
91d76f53 1/*
ab5be9fa
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2 * Copyright (C) 2011 David Goulet <david.goulet@polymtl.ca>
3 * Copyright (C) 2016 Jérémie Galarneau <jeremie.galarneau@efficios.com>
91d76f53 4 *
ab5be9fa 5 * SPDX-License-Identifier: GPL-2.0-only
91d76f53 6 *
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7 */
8
2106efa0 9#ifndef _LTT_UST_APP_H
f6a9efaa 10#define _LTT_UST_APP_H
91d76f53 11
099e26bd 12#include <stdint.h>
1e307fab 13
c70636a7 14#include <common/uuid.h>
f20baf8e 15
44d3bd01 16#include "trace-ust.h"
d0b96690 17#include "ust-registry.h"
5c408ad8 18#include "session.h"
44d3bd01 19
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20#define UST_APP_EVENT_LIST_SIZE 32
21
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22/* Process name (short). */
23#define UST_APP_PROCNAME_LEN 16
d0b96690 24
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25struct lttng_filter_bytecode;
26struct lttng_ust_filter_bytecode;
27
7753dea8 28extern int ust_consumerd64_fd, ust_consumerd32_fd;
ba5d816e 29
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30/*
31 * Object used to close the notify socket in a call_rcu(). Since the
32 * application might not be found, we need an independant object containing the
33 * notify socket fd.
34 */
35struct ust_app_notify_sock_obj {
36 int fd;
37 struct rcu_head head;
38};
39
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40struct ust_app_ht_key {
41 const char *name;
51755dc8 42 const struct lttng_filter_bytecode *filter;
2106efa0 43 enum lttng_ust_loglevel_type loglevel_type;
51755dc8 44 const struct lttng_event_exclusion *exclusion;
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45};
46
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47/*
48 * Application registration data structure.
49 */
50struct ust_register_msg {
d0b96690 51 enum ustctl_socket_type type;
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52 uint32_t major;
53 uint32_t minor;
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54 uint32_t abi_major;
55 uint32_t abi_minor;
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56 pid_t pid;
57 pid_t ppid;
58 uid_t uid;
59 gid_t gid;
0df502fd 60 uint32_t bits_per_long;
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61 uint32_t uint8_t_alignment;
62 uint32_t uint16_t_alignment;
63 uint32_t uint32_t_alignment;
64 uint32_t uint64_t_alignment;
65 uint32_t long_alignment;
66 int byte_order; /* BIG_ENDIAN or LITTLE_ENDIAN */
67 char name[LTTNG_UST_ABI_PROCNAME_LEN];
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68};
69
48842b30 70/*
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71 * Global applications HT used by the session daemon. This table is indexed by
72 * PID using the pid_n node and pid value of an ust_app.
48842b30 73 */
44cdb3a2 74extern struct lttng_ht *ust_app_ht;
f6a9efaa 75
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76/*
77 * Global applications HT used by the session daemon. This table is indexed by
78 * socket using the sock_n node and sock value of an ust_app.
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79 *
80 * The 'sock' in question here is the 'command' socket.
852d0037 81 */
44cdb3a2 82extern struct lttng_ht *ust_app_ht_by_sock;
91d76f53 83
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84/*
85 * Global applications HT used by the session daemon. This table is indexed by
86 * socket using the notify_sock_n node and notify_sock value of an ust_app.
87 */
44cdb3a2 88extern struct lttng_ht *ust_app_ht_by_notify_sock;
d0b96690 89
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90/* Stream list containing ust_app_stream. */
91struct ust_app_stream_list {
92 unsigned int count;
93 struct cds_list_head head;
94};
95
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96struct ust_app_ctx {
97 int handle;
bdf64013 98 struct lttng_ust_context_attr ctx;
55cc08a6 99 struct lttng_ust_object_data *obj;
bec39940 100 struct lttng_ht_node_ulong node;
31746f93 101 struct cds_list_head list;
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102};
103
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104struct ust_app_event {
105 int enabled;
106 int handle;
13161846 107 struct lttng_ust_object_data *obj;
284d8f55 108 struct lttng_ust_event attr;
48842b30 109 char name[LTTNG_UST_SYM_NAME_LEN];
bec39940 110 struct lttng_ht_node_str node;
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111 struct lttng_filter_bytecode *filter;
112 struct lttng_event_exclusion *exclusion;
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113};
114
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115struct ust_app_stream {
116 int handle;
117 char pathname[PATH_MAX];
118 /* Format is %s_%d respectively channel name and CPU number. */
119 char name[DEFAULT_STREAM_NAME_LEN];
120 struct lttng_ust_object_data *obj;
121 /* Using a list of streams to keep order. */
122 struct cds_list_head list;
123};
124
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125struct ust_app_channel {
126 int enabled;
127 int handle;
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128 /* Channel and streams were sent to the UST tracer. */
129 int is_sent;
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130 /*
131 * Unique key used to identify the channel on the consumer side.
132 * 0 is a reserved 'invalid' value used to indicate that the consumer
a9577b76 133 * does not know about this channel (i.e. an error occurred).
dda154b8 134 */
d88aee68 135 uint64_t key;
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136 /* Id of the tracing channel set on creation. */
137 uint64_t tracing_channel_id;
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138 /* Number of stream that this channel is expected to receive. */
139 unsigned int expected_stream_count;
48842b30 140 char name[LTTNG_UST_SYM_NAME_LEN];
13161846 141 struct lttng_ust_object_data *obj;
ffe60014 142 struct ustctl_consumer_channel_attr attr;
030a66fa 143 struct ust_app_stream_list streams;
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144 /* Session pointer that owns this object. */
145 struct ust_app_session *session;
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146 /*
147 * Contexts are kept in a hash table for fast lookup and in an ordered list
148 * so we are able to enable them on the tracer side in the same order the
149 * user added them.
150 */
bec39940 151 struct lttng_ht *ctx;
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152 struct cds_list_head ctx_list;
153
bec39940 154 struct lttng_ht *events;
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155 uint64_t tracefile_size;
156 uint64_t tracefile_count;
e9404c27 157 uint64_t monitor_timer_interval;
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158 /*
159 * Node indexed by channel name in the channels' hash table of a session.
160 */
bec39940 161 struct lttng_ht_node_str node;
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162 /*
163 * Node indexed by UST channel object descriptor (handle). Stored in the
164 * ust_objd hash table in the ust_app object.
165 */
166 struct lttng_ht_node_ulong ust_objd_node;
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167 /* For delayed reclaim */
168 struct rcu_head rcu_head;
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169};
170
171struct ust_app_session {
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172 /*
173 * Lock protecting this session's ust app interaction. Held
174 * across command send/recv to/from app. Never nests within the
175 * session registry lock.
176 */
177 pthread_mutex_t lock;
178
48842b30 179 int enabled;
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180 /* started: has the session been in started state at any time ? */
181 int started; /* allows detection of start vs restart. */
a991f516 182 int handle; /* used has unique identifier for app session */
7972aab2 183
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184 bool deleted; /* Session deleted flag. Check with lock held. */
185
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186 /*
187 * Tracing session ID. Multiple ust app session can have the same tracing
188 * session id making this value NOT unique to the object.
189 */
d9bf3ca4 190 uint64_t tracing_id;
7972aab2 191 uint64_t id; /* Unique session identifier */
bec39940 192 struct lttng_ht *channels; /* Registered channels */
d9bf3ca4 193 struct lttng_ht_node_u64 node;
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194 /*
195 * Node indexed by UST session object descriptor (handle). Stored in the
196 * ust_sessions_objd hash table in the ust_app object.
197 */
198 struct lttng_ht_node_ulong ust_objd_node;
d2956687 199 /* Starts with 'ust'; no leading slash. */
bec39940 200 char path[PATH_MAX];
7972aab2 201 /* UID/GID of the application owning the session */
470cc211 202 struct lttng_credentials real_credentials;
7972aab2 203 /* Effective UID and GID. Same as the tracing session. */
470cc211 204 struct lttng_credentials effective_credentials;
d42f20df 205 struct cds_list_head teardown_node;
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206 /*
207 * Once at least *one* session is created onto the application, the
208 * corresponding consumer is set so we can use it on unregistration.
209 */
210 struct consumer_output *consumer;
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211 enum lttng_buffer_type buffer_type;
212 /* ABI of the session. Same value as the application. */
213 uint32_t bits_per_long;
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214 /* For delayed reclaim */
215 struct rcu_head rcu_head;
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216 /* If the channel's streams have to be outputed or not. */
217 unsigned int output_traces;
ecc48a90 218 unsigned int live_timer_interval; /* usec */
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219
220 /* Metadata channel attributes. */
221 struct ustctl_consumer_channel_attr metadata_attr;
d7ba1388 222
3d071855 223 char root_shm_path[PATH_MAX];
d7ba1388 224 char shm_path[PATH_MAX];
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225};
226
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227/*
228 * Registered traceable applications. Libust registers to the session daemon
050349bb 229 * and a linked list is kept of all running traceable app.
91d76f53 230 */
56fff090 231struct ust_app {
852d0037 232 int sock;
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233 pthread_mutex_t sock_lock; /* Protects sock protocol. */
234
d0b96690 235 int notify_sock;
852d0037 236 pid_t pid;
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237 pid_t ppid;
238 uid_t uid; /* User ID that owns the apps */
aea829b3 239 gid_t gid; /* Group ID that owns the apps */
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240
241 /* App ABI */
242 uint32_t bits_per_long;
243 uint32_t uint8_t_alignment;
244 uint32_t uint16_t_alignment;
245 uint32_t uint32_t_alignment;
246 uint32_t uint64_t_alignment;
247 uint32_t long_alignment;
248 int byte_order; /* BIG_ENDIAN or LITTLE_ENDIAN */
249
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250 int compatible; /* If the lttng-ust tracer version does not match the
251 supported version of the session daemon, this flag is
252 set to 0 (NOT compatible) else 1. */
253 struct lttng_ust_tracer_version version;
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254 uint32_t v_major; /* Version major number */
255 uint32_t v_minor; /* Version minor number */
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256 /* Extra for the NULL byte. */
257 char name[UST_APP_PROCNAME_LEN + 1];
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258 /* Type of buffer this application uses. */
259 enum lttng_buffer_type buffer_type;
bec39940 260 struct lttng_ht *sessions;
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261 struct lttng_ht_node_ulong pid_n;
262 struct lttng_ht_node_ulong sock_n;
d0b96690 263 struct lttng_ht_node_ulong notify_sock_n;
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264 /*
265 * This is a list of ust app session that, once the app is going into
266 * teardown mode, in the RCU call, each node in this list is removed and
267 * deleted.
268 *
269 * Element of the list are added when an application unregisters after each
270 * ht_del of ust_app_session associated to this app. This list is NOT used
271 * when a session is destroyed.
272 */
273 struct cds_list_head teardown_head;
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274 /*
275 * Hash table containing ust_app_channel indexed by channel objd.
276 */
277 struct lttng_ht *ust_objd;
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278 /*
279 * Hash table containing ust_app_session indexed by objd.
280 */
281 struct lttng_ht *ust_sessions_objd;
022d91ba 282
f20baf8e 283 /*
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284 * If this application is of the agent domain and this is non negative then
285 * a lookup MUST be done to acquire a read side reference to the
286 * corresponding agent app object. If the lookup fails, this should be set
287 * to a negative value indicating that the agent application is gone.
f20baf8e 288 */
022d91ba 289 int agent_app_sock;
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290 /*
291 * Time at which the app is registred.
292 * Used for path creation
293 */
294 time_t registration_time;
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295};
296
74d0b642 297#ifdef HAVE_LIBLTTNG_UST_CTL
3bd1e081 298
56fff090 299int ust_app_register(struct ust_register_msg *msg, int sock);
fb45065e 300int ust_app_register_done(struct ust_app *app);
d0b96690 301int ust_app_version(struct ust_app *app);
56fff090 302void ust_app_unregister(int sock);
421cb601 303int ust_app_start_trace_all(struct ltt_ust_session *usess);
8be98f9a 304int ust_app_stop_trace_all(struct ltt_ust_session *usess);
84cd17c6 305int ust_app_destroy_trace_all(struct ltt_ust_session *usess);
b551a063 306int ust_app_list_events(struct lttng_event **events);
f37d259d 307int ust_app_list_event_fields(struct lttng_event_field **fields);
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308int ust_app_create_event_glb(struct ltt_ust_session *usess,
309 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent);
310int ust_app_disable_channel_glb(struct ltt_ust_session *usess,
78f0bacd 311 struct ltt_ust_channel *uchan);
35a9059d 312int ust_app_enable_channel_glb(struct ltt_ust_session *usess,
78f0bacd 313 struct ltt_ust_channel *uchan);
35a9059d 314int ust_app_enable_event_glb(struct ltt_ust_session *usess,
edb67388 315 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent);
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316int ust_app_disable_event_glb(struct ltt_ust_session *usess,
317 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent);
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318int ust_app_add_ctx_channel_glb(struct ltt_ust_session *usess,
319 struct ltt_ust_channel *uchan, struct ltt_ust_context *uctx);
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320void ust_app_global_update(struct ltt_ust_session *usess, struct ust_app *app);
321void ust_app_global_update_all(struct ltt_ust_session *usess);
91d76f53 322
56fff090 323void ust_app_clean_list(void);
57703f6e 324int ust_app_ht_alloc(void);
f6a9efaa 325struct ust_app *ust_app_find_by_pid(pid_t pid);
ffe60014 326struct ust_app_stream *ust_app_alloc_stream(void);
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327int ust_app_recv_registration(int sock, struct ust_register_msg *msg);
328int ust_app_recv_notify(int sock);
329void ust_app_add(struct ust_app *app);
330struct ust_app *ust_app_create(struct ust_register_msg *msg, int sock);
d88aee68 331void ust_app_notify_sock_unregister(int sock);
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332ssize_t ust_app_push_metadata(struct ust_registry_session *registry,
333 struct consumer_socket *socket, int send_zero_data);
f45e313d 334void ust_app_destroy(struct ust_app *app);
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335enum lttng_error_code ust_app_snapshot_record(
336 const struct ltt_ust_session *usess,
348a81dc 337 const struct consumer_output *output, int wait,
d07ceecd 338 uint64_t nb_packets_per_stream);
16f35901 339uint64_t ust_app_get_size_one_more_packet_per_stream(
fb9a95c4 340 const struct ltt_ust_session *usess, uint64_t cur_nr_packets);
f20baf8e 341struct ust_app *ust_app_find_by_sock(int sock);
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342int ust_app_uid_get_channel_runtime_stats(uint64_t ust_session_id,
343 struct cds_list_head *buffer_reg_uid_list,
344 struct consumer_output *consumer, uint64_t uchan_id,
345 int overwrite, uint64_t *discarded, uint64_t *lost);
346int ust_app_pid_get_channel_runtime_stats(struct ltt_ust_session *usess,
347 struct ltt_ust_channel *uchan,
348 struct consumer_output *consumer,
349 int overwrite, uint64_t *discarded, uint64_t *lost);
c2561365 350int ust_app_regenerate_statedump_all(struct ltt_ust_session *usess);
6f6d3b69 351enum lttng_error_code ust_app_rotate_session(struct ltt_session *session);
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352enum lttng_error_code ust_app_create_channel_subdirectories(
353 const struct ltt_ust_session *session);
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354int ust_app_release_object(struct ust_app *app,
355 struct lttng_ust_object_data *data);
4a9b9759 356enum lttng_error_code ust_app_clear_session(struct ltt_session *session);
04ed9e10 357enum lttng_error_code ust_app_open_packets(struct ltt_session *session);
44d3bd01 358
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359static inline
360int ust_app_supported(void)
361{
362 return 1;
363}
364
74d0b642 365#else /* HAVE_LIBLTTNG_UST_CTL */
3bd1e081 366
cc920def
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367static inline
368int ust_app_destroy_trace_all(struct ltt_ust_session *usess)
369{
370 return 0;
371}
d974f197 372static inline
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373int ust_app_start_trace(struct ltt_ust_session *usess, struct ust_app *app)
374{
375 return 0;
376}
377static inline
378int ust_app_start_trace_all(struct ltt_ust_session *usess)
d974f197 379{
5cf5d0e7 380 return 0;
d974f197 381}
3bd1e081 382static inline
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383int ust_app_stop_trace_all(struct ltt_ust_session *usess)
384{
385 return 0;
386}
387static inline
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388int ust_app_list_events(struct lttng_event **events)
389{
db7c0497 390 return -ENOSYS;
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391}
392static inline
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393int ust_app_list_event_fields(struct lttng_event_field **fields)
394{
395 return -ENOSYS;
396}
397static inline
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398int ust_app_register(struct ust_register_msg *msg, int sock)
399{
400 return -ENOSYS;
401}
402static inline
fb45065e 403int ust_app_register_done(struct ust_app *app)
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GF
404{
405 return -ENOSYS;
406}
407static inline
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408int ust_app_version(struct ust_app *app)
409{
410 return -ENOSYS;
411}
412static inline
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413void ust_app_unregister(int sock)
414{
415}
416static inline
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417void ust_app_lock_list(void)
418{
419}
420static inline
421void ust_app_unlock_list(void)
422{
423}
424static inline
425void ust_app_clean_list(void)
426{
427}
428static inline
429struct ust_app_list *ust_app_get_list(void)
430{
431 return NULL;
432}
433static inline
434struct ust_app *ust_app_get_by_pid(pid_t pid)
435{
436 return NULL;
437}
48842b30 438static inline
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439int ust_app_ht_alloc(void)
440{
441 return 0;
442}
cc920def 443static inline
3646a051 444void ust_app_global_update(struct ltt_ust_session *usess, struct ust_app *app)
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445{}
446static inline
35a9059d 447int ust_app_disable_channel_glb(struct ltt_ust_session *usess,
cc920def 448 struct ltt_ust_channel *uchan)
d974f197 449{
cc920def 450 return 0;
d974f197 451}
487cf67c 452static inline
35a9059d 453int ust_app_enable_channel_glb(struct ltt_ust_session *usess,
cc920def 454 struct ltt_ust_channel *uchan)
487cf67c 455{
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456 return 0;
457}
458static inline
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459int ust_app_create_event_glb(struct ltt_ust_session *usess,
460 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent)
461{
462 return 0;
463}
464static inline
465int ust_app_disable_event_glb(struct ltt_ust_session *usess,
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466 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent)
467{
468 return 0;
487cf67c 469}
edb67388 470static inline
35a9059d 471int ust_app_enable_event_glb(struct ltt_ust_session *usess,
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472 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent)
473{
474 return 0;
475}
55cc08a6 476static inline
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477int ust_app_add_ctx_channel_glb(struct ltt_ust_session *usess,
478 struct ltt_ust_channel *uchan, struct ltt_ust_context *uctx)
479{
480 return 0;
481}
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482static inline
483int ust_app_enable_event_pid(struct ltt_ust_session *usess,
484 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent,
485 pid_t pid)
486{
487 return 0;
488}
7f79d3a1 489static inline
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490int ust_app_recv_registration(int sock, struct ust_register_msg *msg)
491{
492 return 0;
493}
494static inline
495int ust_app_recv_notify(int sock)
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496{
497 return 0;
498}
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499static inline
500struct ust_app *ust_app_create(struct ust_register_msg *msg, int sock)
501{
502 return NULL;
503}
504static inline
505void ust_app_add(struct ust_app *app)
506{
507}
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508static inline
509void ust_app_notify_sock_unregister(int sock)
510{
511}
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512static inline
513ssize_t ust_app_push_metadata(struct ust_registry_session *registry,
514 struct consumer_socket *socket, int send_zero_data)
515{
516 return 0;
517}
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518static inline
519void ust_app_destroy(struct ust_app *app)
520{
521 return;
522}
6dc3064a 523static inline
9a654598 524enum lttng_error_code ust_app_snapshot_record(struct ltt_ust_session *usess,
3637639a 525 const struct consumer_output *output, int wait, uint64_t max_stream_size)
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526{
527 return 0;
528}
529static inline
530unsigned int ust_app_get_nb_stream(struct ltt_ust_session *usess)
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531{
532 return 0;
533}
48842b30 534
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535static inline
536int ust_app_supported(void)
537{
538 return 0;
539}
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540static inline
541struct ust_app *ust_app_find_by_sock(int sock)
542{
543 return NULL;
544}
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545static inline
546struct ust_app *ust_app_find_by_pid(pid_t pid)
547{
548 return NULL;
549}
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550static inline
551uint64_t ust_app_get_size_one_more_packet_per_stream(
1f4fc770 552 const struct ltt_ust_session *usess, uint64_t cur_nr_packets) {
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553 return 0;
554}
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555static inline
556int ust_app_uid_get_channel_runtime_stats(uint64_t ust_session_id,
557 struct cds_list_head *buffer_reg_uid_list,
558 struct consumer_output *consumer, int overwrite,
559 uint64_t uchan_id, uint64_t *discarded, uint64_t *lost)
560{
561 return 0;
562}
563
564static inline
565int ust_app_pid_get_channel_runtime_stats(struct ltt_ust_session *usess,
566 struct ltt_ust_channel *uchan,
567 struct consumer_output *consumer,
568 int overwrite, uint64_t *discarded, uint64_t *lost)
569{
570 return 0;
571}
b51ec5b4 572
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573static inline
574int ust_app_regenerate_statedump_all(struct ltt_ust_session *usess)
575{
576 return 0;
577}
578
5c408ad8 579static inline
d5a1b7aa 580enum lttng_error_code ust_app_rotate_session(struct ltt_session *session)
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581{
582 return 0;
583}
584
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585static inline
586enum lttng_error_code ust_app_create_channel_subdirectories(
587 const struct ltt_ust_session *session)
588{
589 return 0;
590}
591
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592static inline
593int ust_app_release_object(struct ust_app *app, struct lttng_ust_object_data *data)
594{
595 return 0;
596}
597
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598static inline
599enum lttng_error_code ust_app_clear_session(struct ltt_session *session)
600{
601 return 0;
602}
603
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604static inline
605enum lttng_error_code ust_app_open_packets(struct ltt_session *session)
606{
607 return 0;
608}
609
74d0b642 610#endif /* HAVE_LIBLTTNG_UST_CTL */
3bd1e081 611
f6a9efaa 612#endif /* _LTT_UST_APP_H */
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