Commit | Line | Data |
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a58c490f | 1 | /* |
ab5be9fa | 2 | * Copyright (C) 2017 Jérémie Galarneau <jeremie.galarneau@efficios.com> |
a58c490f | 3 | * |
ab5be9fa | 4 | * SPDX-License-Identifier: LGPL-2.1-only |
a58c490f | 5 | * |
a58c490f JG |
6 | */ |
7 | ||
0f7c2963 JR |
8 | #include <assert.h> |
9 | #include <common/buffer-view.h> | |
10 | #include <common/dynamic-buffer.h> | |
11 | #include <common/error.h> | |
12 | #include <common/macros.h> | |
13 | #include <common/mi-lttng.h> | |
a58c490f | 14 | #include <lttng/condition/buffer-usage-internal.h> |
0f7c2963 | 15 | #include <lttng/condition/condition-internal.h> |
670a26e4 | 16 | #include <lttng/condition/event-rule-matches-internal.h> |
e8360425 | 17 | #include <lttng/condition/session-consumed-size-internal.h> |
c19092cd | 18 | #include <lttng/condition/session-rotation-internal.h> |
0f7c2963 | 19 | #include <lttng/error-query-internal.h> |
a58c490f | 20 | #include <stdbool.h> |
a58c490f JG |
21 | |
22 | enum lttng_condition_type lttng_condition_get_type( | |
23 | const struct lttng_condition *condition) | |
24 | { | |
25 | return condition ? condition->type : LTTNG_CONDITION_TYPE_UNKNOWN; | |
26 | } | |
27 | ||
28 | void lttng_condition_destroy(struct lttng_condition *condition) | |
4655b864 JR |
29 | { |
30 | lttng_condition_put(condition); | |
31 | } | |
32 | ||
33 | static void condition_destroy_ref(struct urcu_ref *ref) | |
34 | { | |
35 | struct lttng_condition *condition = | |
36 | container_of(ref, struct lttng_condition, ref); | |
37 | ||
38 | condition->destroy(condition); | |
39 | } | |
40 | ||
41 | LTTNG_HIDDEN | |
42 | void lttng_condition_get(struct lttng_condition *condition) | |
43 | { | |
44 | urcu_ref_get(&condition->ref); | |
45 | } | |
46 | ||
47 | LTTNG_HIDDEN | |
48 | void lttng_condition_put(struct lttng_condition *condition) | |
a58c490f JG |
49 | { |
50 | if (!condition) { | |
51 | return; | |
52 | } | |
53 | ||
54 | assert(condition->destroy); | |
4655b864 | 55 | urcu_ref_put(&condition->ref, condition_destroy_ref); |
a58c490f JG |
56 | } |
57 | ||
4655b864 | 58 | |
a58c490f JG |
59 | LTTNG_HIDDEN |
60 | bool lttng_condition_validate(const struct lttng_condition *condition) | |
61 | { | |
62 | bool valid; | |
63 | ||
64 | if (!condition) { | |
65 | valid = false; | |
66 | goto end; | |
67 | } | |
68 | ||
69 | if (!condition->validate) { | |
70 | /* Sub-class guarantees that it can never be invalid. */ | |
71 | valid = true; | |
72 | goto end; | |
73 | } | |
74 | ||
75 | valid = condition->validate(condition); | |
76 | end: | |
77 | return valid; | |
78 | } | |
79 | ||
80 | LTTNG_HIDDEN | |
3647288f | 81 | int lttng_condition_serialize(const struct lttng_condition *condition, |
c0a66c84 | 82 | struct lttng_payload *payload) |
a58c490f | 83 | { |
3647288f | 84 | int ret; |
c0a66c84 | 85 | struct lttng_condition_comm condition_comm = {}; |
a58c490f JG |
86 | |
87 | if (!condition) { | |
88 | ret = -1; | |
89 | goto end; | |
90 | } | |
91 | ||
3647288f JG |
92 | condition_comm.condition_type = (int8_t) condition->type; |
93 | ||
c0a66c84 | 94 | ret = lttng_dynamic_buffer_append(&payload->buffer, &condition_comm, |
3647288f JG |
95 | sizeof(condition_comm)); |
96 | if (ret) { | |
97 | goto end; | |
a58c490f JG |
98 | } |
99 | ||
c0a66c84 | 100 | ret = condition->serialize(condition, payload); |
3647288f | 101 | if (ret) { |
a58c490f JG |
102 | goto end; |
103 | } | |
a58c490f JG |
104 | end: |
105 | return ret; | |
106 | } | |
107 | ||
108 | LTTNG_HIDDEN | |
109 | bool lttng_condition_is_equal(const struct lttng_condition *a, | |
110 | const struct lttng_condition *b) | |
111 | { | |
112 | bool is_equal = false; | |
113 | ||
114 | if (!a || !b) { | |
115 | goto end; | |
116 | } | |
117 | ||
118 | if (a->type != b->type) { | |
119 | goto end; | |
120 | } | |
121 | ||
6c2fe319 JG |
122 | if (a == b) { |
123 | is_equal = true; | |
124 | goto end; | |
125 | } | |
126 | ||
a58c490f JG |
127 | is_equal = a->equal ? a->equal(a, b) : true; |
128 | end: | |
129 | return is_equal; | |
130 | } | |
131 | ||
132 | LTTNG_HIDDEN | |
c0a66c84 JG |
133 | ssize_t lttng_condition_create_from_payload( |
134 | struct lttng_payload_view *view, | |
a58c490f JG |
135 | struct lttng_condition **condition) |
136 | { | |
137 | ssize_t ret, condition_size = 0; | |
c0a66c84 | 138 | condition_create_from_payload_cb create_from_payload = NULL; |
3e6e0df2 JG |
139 | const struct lttng_condition_comm *condition_comm; |
140 | const struct lttng_payload_view condition_comm_view = | |
141 | lttng_payload_view_from_view( | |
142 | view, 0, sizeof(*condition_comm)); | |
a58c490f | 143 | |
c0a66c84 | 144 | if (!view || !condition) { |
a58c490f JG |
145 | ret = -1; |
146 | goto end; | |
147 | } | |
148 | ||
3e6e0df2 JG |
149 | if (!lttng_payload_view_is_valid(&condition_comm_view)) { |
150 | /* Payload not large enough to contain the header. */ | |
151 | ret = -1; | |
152 | goto end; | |
153 | } | |
154 | ||
a58c490f | 155 | DBG("Deserializing condition from buffer"); |
3e6e0df2 | 156 | condition_comm = (typeof(condition_comm)) condition_comm_view.buffer.data; |
a58c490f JG |
157 | condition_size += sizeof(*condition_comm); |
158 | ||
159 | switch ((enum lttng_condition_type) condition_comm->condition_type) { | |
160 | case LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW: | |
c0a66c84 | 161 | create_from_payload = lttng_condition_buffer_usage_low_create_from_payload; |
a58c490f JG |
162 | break; |
163 | case LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH: | |
c0a66c84 | 164 | create_from_payload = lttng_condition_buffer_usage_high_create_from_payload; |
a58c490f | 165 | break; |
e8360425 | 166 | case LTTNG_CONDITION_TYPE_SESSION_CONSUMED_SIZE: |
c0a66c84 | 167 | create_from_payload = lttng_condition_session_consumed_size_create_from_payload; |
e8360425 | 168 | break; |
c19092cd | 169 | case LTTNG_CONDITION_TYPE_SESSION_ROTATION_ONGOING: |
c0a66c84 | 170 | create_from_payload = lttng_condition_session_rotation_ongoing_create_from_payload; |
c19092cd JG |
171 | break; |
172 | case LTTNG_CONDITION_TYPE_SESSION_ROTATION_COMPLETED: | |
c0a66c84 | 173 | create_from_payload = lttng_condition_session_rotation_completed_create_from_payload; |
c19092cd | 174 | break; |
8dbb86b8 JR |
175 | case LTTNG_CONDITION_TYPE_EVENT_RULE_MATCHES: |
176 | create_from_payload = | |
177 | lttng_condition_event_rule_matches_create_from_payload; | |
683d081a | 178 | break; |
a58c490f JG |
179 | default: |
180 | ERR("Attempted to create condition of unknown type (%i)", | |
181 | (int) condition_comm->condition_type); | |
182 | ret = -1; | |
183 | goto end; | |
184 | } | |
185 | ||
c0a66c84 JG |
186 | if (create_from_payload) { |
187 | struct lttng_payload_view condition_view = | |
188 | lttng_payload_view_from_view(view, | |
a58c490f JG |
189 | sizeof(*condition_comm), -1); |
190 | ||
c0a66c84 | 191 | ret = create_from_payload(&condition_view, condition); |
a58c490f JG |
192 | if (ret < 0) { |
193 | goto end; | |
194 | } | |
195 | condition_size += ret; | |
196 | ||
197 | } else { | |
198 | abort(); | |
199 | } | |
200 | ||
201 | ret = condition_size; | |
202 | end: | |
203 | return ret; | |
204 | } | |
205 | ||
206 | LTTNG_HIDDEN | |
207 | void lttng_condition_init(struct lttng_condition *condition, | |
208 | enum lttng_condition_type type) | |
209 | { | |
210 | condition->type = type; | |
4655b864 | 211 | urcu_ref_init(&condition->ref); |
a58c490f | 212 | } |
0de2479d SM |
213 | |
214 | LTTNG_HIDDEN | |
215 | const char *lttng_condition_type_str(enum lttng_condition_type type) | |
216 | { | |
217 | switch (type) { | |
218 | case LTTNG_CONDITION_TYPE_UNKNOWN: | |
219 | return "unknown"; | |
220 | ||
221 | case LTTNG_CONDITION_TYPE_SESSION_CONSUMED_SIZE: | |
222 | return "session consumed size"; | |
223 | ||
224 | case LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH: | |
225 | return "buffer usage high"; | |
226 | ||
227 | case LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW: | |
228 | return "buffer usage low"; | |
229 | ||
230 | case LTTNG_CONDITION_TYPE_SESSION_ROTATION_ONGOING: | |
231 | return "session rotation ongoing"; | |
232 | ||
233 | case LTTNG_CONDITION_TYPE_SESSION_ROTATION_COMPLETED: | |
234 | return "session rotation completed"; | |
235 | ||
8dbb86b8 | 236 | case LTTNG_CONDITION_TYPE_EVENT_RULE_MATCHES: |
e1e94513 | 237 | return "event rule matches"; |
0de2479d SM |
238 | |
239 | default: | |
240 | return "???"; | |
241 | } | |
242 | } | |
0f7c2963 JR |
243 | |
244 | LTTNG_HIDDEN | |
245 | enum lttng_error_code lttng_condition_mi_serialize( | |
246 | const struct lttng_trigger *trigger, | |
247 | const struct lttng_condition *condition, | |
248 | struct mi_writer *writer, | |
249 | const struct mi_lttng_error_query_callbacks *error_query_callbacks) | |
250 | { | |
251 | int ret; | |
252 | enum lttng_error_code ret_code; | |
253 | struct lttng_error_query_results *error_query_results = NULL; | |
254 | ||
255 | assert(condition); | |
256 | assert(writer); | |
257 | assert(condition->mi_serialize); | |
258 | ||
259 | /* Open condition element. */ | |
260 | ret = mi_lttng_writer_open_element(writer, mi_lttng_element_condition); | |
261 | if (ret) { | |
262 | goto mi_error; | |
263 | } | |
264 | ||
265 | /* Serialize underlying condition. */ | |
266 | ret_code = condition->mi_serialize(condition, writer); | |
267 | if (ret_code != LTTNG_OK) { | |
268 | goto end; | |
269 | } | |
270 | ||
271 | /* Serialize error query results for the action. */ | |
272 | if (error_query_callbacks && error_query_callbacks->action_cb) { | |
273 | ret_code = error_query_callbacks->condition_cb( | |
274 | trigger, &error_query_results); | |
275 | if (ret_code != LTTNG_OK) { | |
276 | goto end; | |
277 | } | |
278 | ||
279 | ret_code = lttng_error_query_results_mi_serialize( | |
280 | error_query_results, writer); | |
281 | if (ret_code != LTTNG_OK) { | |
282 | goto end; | |
283 | } | |
284 | } | |
285 | ||
286 | /* Close condition element. */ | |
287 | ret = mi_lttng_writer_close_element(writer); | |
288 | if (ret) { | |
289 | goto mi_error; | |
290 | } | |
291 | ||
292 | ret_code = LTTNG_OK; | |
293 | goto end; | |
294 | ||
295 | mi_error: | |
296 | ret_code = LTTNG_ERR_MI_IO_FAIL; | |
297 | end: | |
298 | lttng_error_query_results_destroy(error_query_results); | |
299 | return ret_code; | |
300 | } |