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97ee3a89 DG |
1 | /* |
2 | * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca> | |
3 | * | |
d14d33bf AM |
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. | |
97ee3a89 DG |
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 | * | |
d14d33bf AM |
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. | |
97ee3a89 DG |
16 | */ |
17 | ||
18 | #ifndef _LTT_TRACE_UST_H | |
19 | #define _LTT_TRACE_UST_H | |
20 | ||
3bd1e081 | 21 | #include <config.h> |
97ee3a89 DG |
22 | #include <limits.h> |
23 | #include <urcu/list.h> | |
bec39940 | 24 | |
97ee3a89 | 25 | #include <lttng/lttng.h> |
10a8a223 | 26 | #include <common/hashtable/hashtable.h> |
ce2a9e76 | 27 | #include <common/defaults.h> |
3bd1e081 | 28 | |
00e2e675 | 29 | #include "consumer.h" |
48842b30 | 30 | #include "ust-ctl.h" |
97ee3a89 | 31 | |
7c1d2758 JG |
32 | struct agent; |
33 | ||
18eace3b DG |
34 | struct ltt_ust_ht_key { |
35 | const char *name; | |
36 | const struct lttng_filter_bytecode *filter; | |
37 | enum lttng_ust_loglevel_type loglevel; | |
7724731b | 38 | const struct lttng_event_exclusion *exclusion; |
18eace3b DG |
39 | }; |
40 | ||
f6a9efaa DG |
41 | /* Context hash table nodes */ |
42 | struct ltt_ust_context { | |
43 | struct lttng_ust_context ctx; | |
bec39940 | 44 | struct lttng_ht_node_ulong node; |
31746f93 | 45 | struct cds_list_head list; |
97ee3a89 DG |
46 | }; |
47 | ||
48 | /* UST event */ | |
49 | struct ltt_ust_event { | |
37357452 | 50 | unsigned int enabled; |
f6a9efaa | 51 | struct lttng_ust_event attr; |
bec39940 | 52 | struct lttng_ht_node_str node; |
6b453b5e | 53 | char *filter_expression; |
53a80697 | 54 | struct lttng_ust_filter_bytecode *filter; |
40024f8a | 55 | struct lttng_event_exclusion *exclusion; |
5b37cc51 JG |
56 | /* |
57 | * An internal event is an event which was created by the session daemon | |
58 | * through which, for example, events emitted in Agent domains are | |
59 | * "funelled". This is used to hide internal events from external | |
60 | * clients as they should never be modified by the external world. | |
61 | */ | |
88f06f15 | 62 | bool internal; |
2bdd86d4 MD |
63 | }; |
64 | ||
97ee3a89 DG |
65 | /* UST channel */ |
66 | struct ltt_ust_channel { | |
7972aab2 | 67 | uint64_t id; /* unique id per session. */ |
37357452 | 68 | unsigned int enabled; |
44d3bd01 | 69 | char name[LTTNG_UST_SYM_NAME_LEN]; |
ffe60014 | 70 | struct lttng_ust_channel_attr attr; |
bec39940 | 71 | struct lttng_ht *ctx; |
31746f93 | 72 | struct cds_list_head ctx_list; |
bec39940 DG |
73 | struct lttng_ht *events; |
74 | struct lttng_ht_node_str node; | |
1624d5b7 JD |
75 | uint64_t tracefile_size; |
76 | uint64_t tracefile_count; | |
97ee3a89 DG |
77 | }; |
78 | ||
f6a9efaa DG |
79 | /* UST domain global (LTTNG_DOMAIN_UST) */ |
80 | struct ltt_ust_domain_global { | |
bec39940 | 81 | struct lttng_ht *channels; |
7972aab2 | 82 | struct cds_list_head registry_buffer_uid_list; |
f6a9efaa DG |
83 | }; |
84 | ||
a9ad0c8f MD |
85 | struct ust_pid_tracker_node { |
86 | struct lttng_ht_node_ulong node; | |
87 | }; | |
88 | ||
89 | struct ust_pid_tracker { | |
90 | struct lttng_ht *ht; | |
91 | }; | |
92 | ||
97ee3a89 DG |
93 | /* UST session */ |
94 | struct ltt_ust_session { | |
d9bf3ca4 | 95 | uint64_t id; /* Unique identifier of session */ |
f6a9efaa | 96 | struct ltt_ust_domain_global domain_global; |
fefd409b DG |
97 | /* Hash table of agent indexed by agent domain. */ |
98 | struct lttng_ht *agents; | |
6df2e2c9 MD |
99 | /* UID/GID of the user owning the session */ |
100 | uid_t uid; | |
101 | gid_t gid; | |
14fb1ebe DG |
102 | /* Is the session active meaning has is been started or stopped. */ |
103 | unsigned int active:1; | |
00e2e675 DG |
104 | /* |
105 | * Two consumer_output object are needed where one is for the current | |
106 | * output object and the second one is the temporary object used to store | |
107 | * URI being set by the lttng_set_consumer_uri call. Once | |
108 | * lttng_enable_consumer is called, the two pointers are swapped. | |
109 | */ | |
110 | struct consumer_output *consumer; | |
111 | struct consumer_output *tmp_consumer; | |
f3f0db50 DG |
112 | /* Sequence number for filters so the tracer knows the ordering. */ |
113 | uint64_t filter_seq_num; | |
7972aab2 DG |
114 | /* This indicates which type of buffer this session is set for. */ |
115 | enum lttng_buffer_type buffer_type; | |
116 | /* If set to 1, the buffer_type can not be changed anymore. */ | |
117 | int buffer_type_changed; | |
118 | /* For per UID buffer, every buffer reg object is kept of this session */ | |
119 | struct cds_list_head buffer_reg_uid_list; | |
120 | /* Next channel ID available for a newly registered channel. */ | |
121 | uint64_t next_channel_id; | |
122 | /* Once this value reaches UINT32_MAX, no more id can be allocated. */ | |
123 | uint64_t used_channel_id; | |
2bba9e53 DG |
124 | /* Tell or not if the session has to output the traces. */ |
125 | unsigned int output_traces; | |
27babd3a | 126 | unsigned int snapshot_mode; |
85076754 | 127 | unsigned int has_non_default_channel; |
ecc48a90 | 128 | unsigned int live_timer_interval; /* usec */ |
84ad93e8 DG |
129 | |
130 | /* Metadata channel attributes. */ | |
131 | struct lttng_ust_channel_attr metadata_attr; | |
d7ba1388 MD |
132 | |
133 | /* | |
134 | * Path where to keep the shared memory files. | |
135 | */ | |
3d071855 | 136 | char root_shm_path[PATH_MAX]; |
d7ba1388 | 137 | char shm_path[PATH_MAX]; |
a9ad0c8f MD |
138 | |
139 | struct ust_pid_tracker pid_tracker; | |
97ee3a89 DG |
140 | }; |
141 | ||
7972aab2 DG |
142 | /* |
143 | * Validate that the id has reached the maximum allowed or not. | |
144 | * | |
145 | * Return 0 if NOT else 1. | |
146 | */ | |
147 | static inline int trace_ust_is_max_id(uint64_t id) | |
148 | { | |
149 | return (id == UINT64_MAX) ? 1 : 0; | |
150 | } | |
151 | ||
152 | /* | |
153 | * Return next available channel id and increment the used counter. The | |
154 | * trace_ust_is_max_id function MUST be called before in order to validate if | |
155 | * the maximum number of IDs have been reached. If not, it is safe to call this | |
156 | * function. | |
157 | * | |
158 | * Return a unique channel ID. If max is reached, the used_channel_id counter | |
159 | * is returned. | |
160 | */ | |
161 | static inline uint64_t trace_ust_get_next_chan_id(struct ltt_ust_session *s) | |
162 | { | |
163 | if (trace_ust_is_max_id(s->used_channel_id)) { | |
164 | return s->used_channel_id; | |
165 | } | |
166 | ||
167 | s->used_channel_id++; | |
168 | return s->next_channel_id++; | |
169 | } | |
170 | ||
74d0b642 | 171 | #ifdef HAVE_LIBLTTNG_UST_CTL |
3bd1e081 | 172 | |
18eace3b DG |
173 | int trace_ust_ht_match_event(struct cds_lfht_node *node, const void *_key); |
174 | int trace_ust_ht_match_event_by_name(struct cds_lfht_node *node, | |
175 | const void *_key); | |
176 | ||
97ee3a89 DG |
177 | /* |
178 | * Lookup functions. NULL is returned if not found. | |
179 | */ | |
18eace3b | 180 | struct ltt_ust_event *trace_ust_find_event(struct lttng_ht *ht, |
10646003 JI |
181 | char *name, struct lttng_filter_bytecode *filter, int loglevel, |
182 | struct lttng_event_exclusion *exclusion); | |
bec39940 | 183 | struct ltt_ust_channel *trace_ust_find_channel_by_name(struct lttng_ht *ht, |
f6a9efaa | 184 | char *name); |
fefd409b DG |
185 | struct agent *trace_ust_find_agent(struct ltt_ust_session *session, |
186 | enum lttng_domain_type domain_type); | |
97ee3a89 DG |
187 | |
188 | /* | |
189 | * Create functions malloc() the data structure. | |
190 | */ | |
d9bf3ca4 | 191 | struct ltt_ust_session *trace_ust_create_session(uint64_t session_id); |
dec56f6c | 192 | struct ltt_ust_channel *trace_ust_create_channel(struct lttng_channel *attr); |
025faf73 | 193 | struct ltt_ust_event *trace_ust_create_event(struct lttng_event *ev, |
6b453b5e | 194 | char *filter_expression, |
561c6897 | 195 | struct lttng_filter_bytecode *filter, |
88f06f15 JG |
196 | struct lttng_event_exclusion *exclusion, |
197 | bool internal_event); | |
55cc08a6 DG |
198 | struct ltt_ust_context *trace_ust_create_context( |
199 | struct lttng_event_context *ctx); | |
aa3514e9 MD |
200 | int trace_ust_match_context(struct ltt_ust_context *uctx, |
201 | struct lttng_event_context *ctx); | |
d5979e4a DG |
202 | void trace_ust_delete_channel(struct lttng_ht *ht, |
203 | struct ltt_ust_channel *channel); | |
97ee3a89 DG |
204 | |
205 | /* | |
206 | * Destroy functions free() the data structure and remove from linked list if | |
207 | * it's applies. | |
208 | */ | |
209 | void trace_ust_destroy_session(struct ltt_ust_session *session); | |
97ee3a89 DG |
210 | void trace_ust_destroy_channel(struct ltt_ust_channel *channel); |
211 | void trace_ust_destroy_event(struct ltt_ust_event *event); | |
212 | ||
a9ad0c8f MD |
213 | int trace_ust_track_pid(struct ltt_ust_session *session, int pid); |
214 | int trace_ust_untrack_pid(struct ltt_ust_session *session, int pid); | |
215 | ||
b4650bd0 MD |
216 | int trace_ust_pid_tracker_lookup(struct ltt_ust_session *session, int pid); |
217 | ||
a5dfbb9d MD |
218 | ssize_t trace_ust_list_tracker_pids(struct ltt_ust_session *session, |
219 | int32_t **_pids); | |
220 | ||
74d0b642 | 221 | #else /* HAVE_LIBLTTNG_UST_CTL */ |
3bd1e081 | 222 | |
37a86c61 DG |
223 | static inline int trace_ust_ht_match_event(struct cds_lfht_node *node, |
224 | const void *_key) | |
225 | { | |
226 | return 0; | |
227 | } | |
228 | static inline int trace_ust_ht_match_event_by_name(struct cds_lfht_node *node, | |
229 | const void *_key) | |
230 | { | |
231 | return 0; | |
232 | } | |
3bd1e081 | 233 | static inline |
bec39940 | 234 | struct ltt_ust_channel *trace_ust_find_channel_by_name(struct lttng_ht *ht, |
f6a9efaa | 235 | char *name) |
3bd1e081 MD |
236 | { |
237 | return NULL; | |
238 | } | |
f6a9efaa | 239 | |
3bd1e081 | 240 | static inline |
dec56f6c | 241 | struct ltt_ust_session *trace_ust_create_session(unsigned int session_id) |
3bd1e081 MD |
242 | { |
243 | return NULL; | |
244 | } | |
245 | static inline | |
dec56f6c | 246 | struct ltt_ust_channel *trace_ust_create_channel(struct lttng_channel *attr) |
3bd1e081 MD |
247 | { |
248 | return NULL; | |
249 | } | |
250 | static inline | |
025faf73 | 251 | struct ltt_ust_event *trace_ust_create_event(struct lttng_event *ev, |
6b453b5e | 252 | const char *filter_expression, |
561c6897 | 253 | struct lttng_filter_bytecode *filter, |
88f06f15 JG |
254 | struct lttng_event_exclusion *exclusion, |
255 | bool internal_event) | |
3bd1e081 MD |
256 | { |
257 | return NULL; | |
258 | } | |
3bd1e081 MD |
259 | static inline |
260 | void trace_ust_destroy_session(struct ltt_ust_session *session) | |
261 | { | |
262 | } | |
48842b30 | 263 | |
3bd1e081 MD |
264 | static inline |
265 | void trace_ust_destroy_channel(struct ltt_ust_channel *channel) | |
266 | { | |
267 | } | |
48842b30 | 268 | |
3bd1e081 MD |
269 | static inline |
270 | void trace_ust_destroy_event(struct ltt_ust_event *event) | |
271 | { | |
272 | } | |
34378f76 DG |
273 | static inline |
274 | struct ltt_ust_context *trace_ust_create_context( | |
275 | struct lttng_event_context *ctx) | |
276 | { | |
277 | return NULL; | |
278 | } | |
aa3514e9 MD |
279 | static inline |
280 | int trace_ust_match_context(struct ltt_ust_context *uctx, | |
281 | struct lttng_event_context *ctx) | |
282 | { | |
283 | return 0; | |
284 | } | |
37a86c61 | 285 | static inline struct ltt_ust_event *trace_ust_find_event(struct lttng_ht *ht, |
10646003 JI |
286 | char *name, struct lttng_filter_bytecode *filter, int loglevel, |
287 | struct lttng_event_exclusion *exclusion) | |
37a86c61 DG |
288 | { |
289 | return NULL; | |
290 | } | |
d5979e4a DG |
291 | static inline |
292 | void trace_ust_delete_channel(struct lttng_ht *ht, | |
293 | struct ltt_ust_channel *channel) | |
294 | { | |
295 | return; | |
296 | } | |
fefd409b DG |
297 | static inline |
298 | struct agent *trace_ust_find_agent(struct ltt_ust_session *session, | |
299 | enum lttng_domain_type domain_type) | |
300 | { | |
301 | return NULL; | |
302 | } | |
a9ad0c8f MD |
303 | static inline |
304 | int trace_ust_track_pid(struct ltt_ust_session *session, int pid) | |
305 | { | |
306 | return 0; | |
307 | } | |
308 | static inline | |
309 | int trace_ust_untrack_pid(struct ltt_ust_session *session, int pid) | |
310 | { | |
311 | return 0; | |
312 | } | |
b4650bd0 MD |
313 | static inline |
314 | int trace_ust_pid_tracker_lookup(struct ltt_ust_session *session, int pid) | |
315 | { | |
316 | return 0; | |
317 | } | |
3646a051 | 318 | static inline |
a5dfbb9d MD |
319 | ssize_t trace_ust_list_tracker_pids(struct ltt_ust_session *session, |
320 | int32_t **_pids) | |
321 | { | |
322 | return -1; | |
323 | } | |
74d0b642 | 324 | #endif /* HAVE_LIBLTTNG_UST_CTL */ |
3bd1e081 | 325 | |
97ee3a89 | 326 | #endif /* _LTT_TRACE_UST_H */ |