sessiond: use `loglevel_value` and `loglevel_type` names
[lttng-tools.git] / src / bin / lttng-sessiond / ust-app.h
CommitLineData
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1/*
2 * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
3 *
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4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License, version 2 only,
6 * as published by the Free Software Foundation.
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7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
12 *
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13 * You should have received a copy of the GNU General Public License along
14 * with this program; if not, write to the Free Software Foundation, Inc.,
15 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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16 */
17
2106efa0 18#ifndef _LTT_UST_APP_H
f6a9efaa 19#define _LTT_UST_APP_H
91d76f53 20
099e26bd 21#include <stdint.h>
1e307fab 22
ffe60014 23#include <common/compat/uuid.h>
f20baf8e 24
44d3bd01 25#include "trace-ust.h"
d0b96690 26#include "ust-registry.h"
44d3bd01 27
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28#define UST_APP_EVENT_LIST_SIZE 32
29
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30/* Process name (short). */
31#define UST_APP_PROCNAME_LEN 16
d0b96690 32
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33struct lttng_filter_bytecode;
34struct lttng_ust_filter_bytecode;
35
7753dea8 36extern int ust_consumerd64_fd, ust_consumerd32_fd;
ba5d816e 37
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38/*
39 * Object used to close the notify socket in a call_rcu(). Since the
40 * application might not be found, we need an independant object containing the
41 * notify socket fd.
42 */
43struct ust_app_notify_sock_obj {
44 int fd;
45 struct rcu_head head;
46};
47
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48struct ust_app_ht_key {
49 const char *name;
51755dc8 50 const struct lttng_filter_bytecode *filter;
2106efa0 51 enum lttng_ust_loglevel_type loglevel_type;
51755dc8 52 const struct lttng_event_exclusion *exclusion;
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53};
54
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55/*
56 * Application registration data structure.
57 */
58struct ust_register_msg {
d0b96690 59 enum ustctl_socket_type type;
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60 uint32_t major;
61 uint32_t minor;
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62 uint32_t abi_major;
63 uint32_t abi_minor;
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64 pid_t pid;
65 pid_t ppid;
66 uid_t uid;
67 gid_t gid;
0df502fd 68 uint32_t bits_per_long;
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69 uint32_t uint8_t_alignment;
70 uint32_t uint16_t_alignment;
71 uint32_t uint32_t_alignment;
72 uint32_t uint64_t_alignment;
73 uint32_t long_alignment;
74 int byte_order; /* BIG_ENDIAN or LITTLE_ENDIAN */
75 char name[LTTNG_UST_ABI_PROCNAME_LEN];
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76};
77
48842b30 78/*
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79 * Global applications HT used by the session daemon. This table is indexed by
80 * PID using the pid_n node and pid value of an ust_app.
48842b30 81 */
bec39940 82struct lttng_ht *ust_app_ht;
f6a9efaa 83
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84/*
85 * Global applications HT used by the session daemon. This table is indexed by
86 * socket using the sock_n node and sock value of an ust_app.
87 */
88struct lttng_ht *ust_app_ht_by_sock;
91d76f53 89
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90/*
91 * Global applications HT used by the session daemon. This table is indexed by
92 * socket using the notify_sock_n node and notify_sock value of an ust_app.
93 */
94struct lttng_ht *ust_app_ht_by_notify_sock;
95
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96/* Stream list containing ust_app_stream. */
97struct ust_app_stream_list {
98 unsigned int count;
99 struct cds_list_head head;
100};
101
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102struct ust_app_ctx {
103 int handle;
104 struct lttng_ust_context ctx;
105 struct lttng_ust_object_data *obj;
bec39940 106 struct lttng_ht_node_ulong node;
31746f93 107 struct cds_list_head list;
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108};
109
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110struct ust_app_event {
111 int enabled;
112 int handle;
13161846 113 struct lttng_ust_object_data *obj;
284d8f55 114 struct lttng_ust_event attr;
48842b30 115 char name[LTTNG_UST_SYM_NAME_LEN];
bec39940 116 struct lttng_ht_node_str node;
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117 struct lttng_filter_bytecode *filter;
118 struct lttng_event_exclusion *exclusion;
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119};
120
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121struct ust_app_stream {
122 int handle;
123 char pathname[PATH_MAX];
124 /* Format is %s_%d respectively channel name and CPU number. */
125 char name[DEFAULT_STREAM_NAME_LEN];
126 struct lttng_ust_object_data *obj;
127 /* Using a list of streams to keep order. */
128 struct cds_list_head list;
129};
130
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131struct ust_app_channel {
132 int enabled;
133 int handle;
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134 /* Channel and streams were sent to the UST tracer. */
135 int is_sent;
136 /* Unique key used to identify the channel on the consumer side. */
d88aee68 137 uint64_t key;
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138 /* Id of the tracing channel set on creation. */
139 uint64_t tracing_channel_id;
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140 /* Number of stream that this channel is expected to receive. */
141 unsigned int expected_stream_count;
48842b30 142 char name[LTTNG_UST_SYM_NAME_LEN];
13161846 143 struct lttng_ust_object_data *obj;
ffe60014 144 struct ustctl_consumer_channel_attr attr;
030a66fa 145 struct ust_app_stream_list streams;
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146 /* Session pointer that owns this object. */
147 struct ust_app_session *session;
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148 /*
149 * Contexts are kept in a hash table for fast lookup and in an ordered list
150 * so we are able to enable them on the tracer side in the same order the
151 * user added them.
152 */
bec39940 153 struct lttng_ht *ctx;
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154 struct cds_list_head ctx_list;
155
bec39940 156 struct lttng_ht *events;
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157 uint64_t tracefile_size;
158 uint64_t tracefile_count;
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159 /*
160 * Node indexed by channel name in the channels' hash table of a session.
161 */
bec39940 162 struct lttng_ht_node_str node;
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163 /*
164 * Node indexed by UST channel object descriptor (handle). Stored in the
165 * ust_objd hash table in the ust_app object.
166 */
167 struct lttng_ht_node_ulong ust_objd_node;
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168 /* For delayed reclaim */
169 struct rcu_head rcu_head;
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170};
171
172struct ust_app_session {
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173 /*
174 * Lock protecting this session's ust app interaction. Held
175 * across command send/recv to/from app. Never nests within the
176 * session registry lock.
177 */
178 pthread_mutex_t lock;
179
48842b30 180 int enabled;
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181 /* started: has the session been in started state at any time ? */
182 int started; /* allows detection of start vs restart. */
a991f516 183 int handle; /* used has unique identifier for app session */
7972aab2 184
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185 bool deleted; /* Session deleted flag. Check with lock held. */
186
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187 /*
188 * Tracing session ID. Multiple ust app session can have the same tracing
189 * session id making this value NOT unique to the object.
190 */
d9bf3ca4 191 uint64_t tracing_id;
7972aab2 192 uint64_t id; /* Unique session identifier */
bec39940 193 struct lttng_ht *channels; /* Registered channels */
d9bf3ca4 194 struct lttng_ht_node_u64 node;
bec39940 195 char path[PATH_MAX];
7972aab2 196 /* UID/GID of the application owning the session */
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197 uid_t uid;
198 gid_t gid;
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199 /* Effective UID and GID. Same as the tracing session. */
200 uid_t euid;
201 gid_t egid;
d42f20df 202 struct cds_list_head teardown_node;
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203 /*
204 * Once at least *one* session is created onto the application, the
205 * corresponding consumer is set so we can use it on unregistration.
206 */
207 struct consumer_output *consumer;
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208 enum lttng_buffer_type buffer_type;
209 /* ABI of the session. Same value as the application. */
210 uint32_t bits_per_long;
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211 /* For delayed reclaim */
212 struct rcu_head rcu_head;
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213 /* If the channel's streams have to be outputed or not. */
214 unsigned int output_traces;
ecc48a90 215 unsigned int live_timer_interval; /* usec */
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216
217 /* Metadata channel attributes. */
218 struct ustctl_consumer_channel_attr metadata_attr;
d7ba1388 219
3d071855 220 char root_shm_path[PATH_MAX];
d7ba1388 221 char shm_path[PATH_MAX];
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222};
223
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224/*
225 * Registered traceable applications. Libust registers to the session daemon
050349bb 226 * and a linked list is kept of all running traceable app.
91d76f53 227 */
56fff090 228struct ust_app {
852d0037 229 int sock;
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230 pthread_mutex_t sock_lock; /* Protects sock protocol. */
231
d0b96690 232 int notify_sock;
852d0037 233 pid_t pid;
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234 pid_t ppid;
235 uid_t uid; /* User ID that owns the apps */
aea829b3 236 gid_t gid; /* Group ID that owns the apps */
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237
238 /* App ABI */
239 uint32_t bits_per_long;
240 uint32_t uint8_t_alignment;
241 uint32_t uint16_t_alignment;
242 uint32_t uint32_t_alignment;
243 uint32_t uint64_t_alignment;
244 uint32_t long_alignment;
245 int byte_order; /* BIG_ENDIAN or LITTLE_ENDIAN */
246
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247 int compatible; /* If the lttng-ust tracer version does not match the
248 supported version of the session daemon, this flag is
249 set to 0 (NOT compatible) else 1. */
250 struct lttng_ust_tracer_version version;
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251 uint32_t v_major; /* Version major number */
252 uint32_t v_minor; /* Version minor number */
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253 /* Extra for the NULL byte. */
254 char name[UST_APP_PROCNAME_LEN + 1];
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255 /* Type of buffer this application uses. */
256 enum lttng_buffer_type buffer_type;
bec39940 257 struct lttng_ht *sessions;
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258 struct lttng_ht_node_ulong pid_n;
259 struct lttng_ht_node_ulong sock_n;
d0b96690 260 struct lttng_ht_node_ulong notify_sock_n;
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261 /*
262 * This is a list of ust app session that, once the app is going into
263 * teardown mode, in the RCU call, each node in this list is removed and
264 * deleted.
265 *
266 * Element of the list are added when an application unregisters after each
267 * ht_del of ust_app_session associated to this app. This list is NOT used
268 * when a session is destroyed.
269 */
270 struct cds_list_head teardown_head;
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271 /*
272 * Hash table containing ust_app_channel indexed by channel objd.
273 */
274 struct lttng_ht *ust_objd;
022d91ba 275
f20baf8e 276 /*
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277 * If this application is of the agent domain and this is non negative then
278 * a lookup MUST be done to acquire a read side reference to the
279 * corresponding agent app object. If the lookup fails, this should be set
280 * to a negative value indicating that the agent application is gone.
f20baf8e 281 */
022d91ba 282 int agent_app_sock;
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283};
284
74d0b642 285#ifdef HAVE_LIBLTTNG_UST_CTL
3bd1e081 286
56fff090 287int ust_app_register(struct ust_register_msg *msg, int sock);
fb45065e 288int ust_app_register_done(struct ust_app *app);
d0b96690 289int ust_app_version(struct ust_app *app);
56fff090 290void ust_app_unregister(int sock);
421cb601 291int ust_app_start_trace_all(struct ltt_ust_session *usess);
8be98f9a 292int ust_app_stop_trace_all(struct ltt_ust_session *usess);
84cd17c6 293int ust_app_destroy_trace_all(struct ltt_ust_session *usess);
b551a063 294int ust_app_list_events(struct lttng_event **events);
f37d259d 295int ust_app_list_event_fields(struct lttng_event_field **fields);
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296int ust_app_create_channel_glb(struct ltt_ust_session *usess,
297 struct ltt_ust_channel *uchan);
298int ust_app_create_event_glb(struct ltt_ust_session *usess,
299 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent);
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300int ust_app_enable_event_pid(struct ltt_ust_session *usess,
301 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent,
302 pid_t pid);
35a9059d 303int ust_app_disable_channel_glb(struct ltt_ust_session *usess,
78f0bacd 304 struct ltt_ust_channel *uchan);
35a9059d 305int ust_app_enable_channel_glb(struct ltt_ust_session *usess,
78f0bacd 306 struct ltt_ust_channel *uchan);
35a9059d 307int ust_app_enable_event_glb(struct ltt_ust_session *usess,
edb67388 308 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent);
35a9059d 309int ust_app_enable_all_event_glb(struct ltt_ust_session *usess,
9730260e 310 struct ltt_ust_channel *uchan);
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311int ust_app_disable_event_glb(struct ltt_ust_session *usess,
312 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent);
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313int ust_app_add_ctx_channel_glb(struct ltt_ust_session *usess,
314 struct ltt_ust_channel *uchan, struct ltt_ust_context *uctx);
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315void ust_app_global_update(struct ltt_ust_session *usess, struct ust_app *app);
316void ust_app_global_update_all(struct ltt_ust_session *usess);
91d76f53 317
56fff090 318void ust_app_clean_list(void);
57703f6e 319int ust_app_ht_alloc(void);
f6a9efaa 320struct ust_app *ust_app_find_by_pid(pid_t pid);
4466912f 321int ust_app_calibrate_glb(struct lttng_ust_calibrate *calibrate);
ffe60014 322struct ust_app_stream *ust_app_alloc_stream(void);
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323int ust_app_recv_registration(int sock, struct ust_register_msg *msg);
324int ust_app_recv_notify(int sock);
325void ust_app_add(struct ust_app *app);
326struct ust_app *ust_app_create(struct ust_register_msg *msg, int sock);
d88aee68 327void ust_app_notify_sock_unregister(int sock);
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328ssize_t ust_app_push_metadata(struct ust_registry_session *registry,
329 struct consumer_socket *socket, int send_zero_data);
f45e313d 330void ust_app_destroy(struct ust_app *app);
6dc3064a 331int ust_app_snapshot_record(struct ltt_ust_session *usess,
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332 struct snapshot_output *output, int wait,
333 uint64_t nb_packets_per_stream);
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334uint64_t ust_app_get_size_one_more_packet_per_stream(
335 struct ltt_ust_session *usess, uint64_t cur_nr_packets);
f20baf8e 336struct ust_app *ust_app_find_by_sock(int sock);
44d3bd01 337
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338static inline
339int ust_app_supported(void)
340{
341 return 1;
342}
343
74d0b642 344#else /* HAVE_LIBLTTNG_UST_CTL */
3bd1e081 345
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346static inline
347int ust_app_destroy_trace_all(struct ltt_ust_session *usess)
348{
349 return 0;
350}
d974f197 351static inline
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352int ust_app_start_trace(struct ltt_ust_session *usess, struct ust_app *app)
353{
354 return 0;
355}
356static inline
357int ust_app_start_trace_all(struct ltt_ust_session *usess)
d974f197 358{
5cf5d0e7 359 return 0;
d974f197 360}
3bd1e081 361static inline
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362int ust_app_stop_trace_all(struct ltt_ust_session *usess)
363{
364 return 0;
365}
366static inline
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367int ust_app_list_events(struct lttng_event **events)
368{
db7c0497 369 return -ENOSYS;
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370}
371static inline
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372int ust_app_list_event_fields(struct lttng_event_field **fields)
373{
374 return -ENOSYS;
375}
376static inline
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377int ust_app_register(struct ust_register_msg *msg, int sock)
378{
379 return -ENOSYS;
380}
381static inline
fb45065e 382int ust_app_register_done(struct ust_app *app)
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383{
384 return -ENOSYS;
385}
386static inline
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387int ust_app_version(struct ust_app *app)
388{
389 return -ENOSYS;
390}
391static inline
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392void ust_app_unregister(int sock)
393{
394}
395static inline
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396void ust_app_lock_list(void)
397{
398}
399static inline
400void ust_app_unlock_list(void)
401{
402}
403static inline
404void ust_app_clean_list(void)
405{
406}
407static inline
408struct ust_app_list *ust_app_get_list(void)
409{
410 return NULL;
411}
412static inline
413struct ust_app *ust_app_get_by_pid(pid_t pid)
414{
415 return NULL;
416}
48842b30 417static inline
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418int ust_app_ht_alloc(void)
419{
420 return 0;
421}
cc920def 422static inline
3646a051 423void ust_app_global_update(struct ltt_ust_session *usess, struct ust_app *app)
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424{}
425static inline
35a9059d 426int ust_app_disable_channel_glb(struct ltt_ust_session *usess,
cc920def 427 struct ltt_ust_channel *uchan)
d974f197 428{
cc920def 429 return 0;
d974f197 430}
487cf67c 431static inline
35a9059d 432int ust_app_enable_channel_glb(struct ltt_ust_session *usess,
cc920def 433 struct ltt_ust_channel *uchan)
487cf67c 434{
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435 return 0;
436}
437static inline
35a9059d 438int ust_app_create_channel_glb(struct ltt_ust_session *usess,
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439 struct ltt_ust_channel *uchan)
440{
441 return 0;
442}
443static inline
35a9059d 444int ust_app_enable_all_event_glb(struct ltt_ust_session *usess,
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445 struct ltt_ust_channel *uchan)
446{
447 return 0;
448}
449static inline
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450int ust_app_create_event_glb(struct ltt_ust_session *usess,
451 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent)
452{
453 return 0;
454}
455static inline
456int ust_app_disable_event_glb(struct ltt_ust_session *usess,
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457 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent)
458{
459 return 0;
487cf67c 460}
edb67388 461static inline
35a9059d 462int ust_app_enable_event_glb(struct ltt_ust_session *usess,
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463 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent)
464{
465 return 0;
466}
55cc08a6 467static inline
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468int ust_app_add_ctx_channel_glb(struct ltt_ust_session *usess,
469 struct ltt_ust_channel *uchan, struct ltt_ust_context *uctx)
470{
471 return 0;
472}
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473static inline
474int ust_app_enable_event_pid(struct ltt_ust_session *usess,
475 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent,
476 pid_t pid)
477{
478 return 0;
479}
7f79d3a1 480static inline
d0b96690 481int ust_app_calibrate_glb(struct lttng_ust_calibrate *calibrate)
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482{
483 return 0;
484}
4466912f 485static inline
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486int ust_app_recv_registration(int sock, struct ust_register_msg *msg)
487{
488 return 0;
489}
490static inline
491int ust_app_recv_notify(int sock)
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492{
493 return 0;
494}
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495static inline
496struct ust_app *ust_app_create(struct ust_register_msg *msg, int sock)
497{
498 return NULL;
499}
500static inline
501void ust_app_add(struct ust_app *app)
502{
503}
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504static inline
505void ust_app_notify_sock_unregister(int sock)
506{
507}
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508static inline
509ssize_t ust_app_push_metadata(struct ust_registry_session *registry,
510 struct consumer_socket *socket, int send_zero_data)
511{
512 return 0;
513}
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514static inline
515void ust_app_destroy(struct ust_app *app)
516{
517 return;
518}
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519static inline
520int ust_app_snapshot_record(struct ltt_ust_session *usess,
68808f4e 521 struct snapshot_output *output, int wait, uint64_t max_stream_size)
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522{
523 return 0;
524}
525static inline
526unsigned int ust_app_get_nb_stream(struct ltt_ust_session *usess)
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527{
528 return 0;
529}
48842b30 530
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531static inline
532int ust_app_supported(void)
533{
534 return 0;
535}
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536static inline
537struct ust_app *ust_app_find_by_sock(int sock)
538{
539 return NULL;
540}
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541static inline
542struct ust_app *ust_app_find_by_pid(pid_t pid)
543{
544 return NULL;
545}
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546static inline
547uint64_t ust_app_get_size_one_more_packet_per_stream(
548 struct ltt_ust_session *usess, uint64_t cur_nr_packets) {
549 return 0;
550}
b51ec5b4 551
74d0b642 552#endif /* HAVE_LIBLTTNG_UST_CTL */
3bd1e081 553
f6a9efaa 554#endif /* _LTT_UST_APP_H */
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