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f42dcd79 JG |
1 | /* |
2 | * Copyright (C) 2017 - Jérémie Galarneau <jeremie.galarneau@efficios.com> | |
3 | * | |
4 | * This library is free software; you can redistribute it and/or modify it | |
5 | * under the terms of the GNU Lesser General Public License, version 2.1 only, | |
6 | * as published by the Free Software Foundation. | |
7 | * | |
8 | * This library is distributed in the hope that it will be useful, but WITHOUT | |
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License | |
11 | * for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU Lesser General Public License | |
14 | * along with this library; if not, write to the Free Software Foundation, | |
15 | * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
16 | */ | |
17 | ||
18 | #include <lttng/condition/condition-internal.h> | |
19 | #include <lttng/condition/buffer-usage-internal.h> | |
20 | #include <common/macros.h> | |
21 | #include <assert.h> | |
22 | ||
23 | static | |
24 | bool is_usage_condition(struct lttng_condition *condition) | |
25 | { | |
26 | enum lttng_condition_type type = lttng_condition_get_type(condition); | |
27 | ||
28 | return type == LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW || | |
29 | type == LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH; | |
30 | } | |
31 | ||
32 | static | |
e892d3f7 | 33 | bool is_usage_evaluation(struct lttng_evaluation *evaluation) |
f42dcd79 | 34 | { |
e892d3f7 JG |
35 | enum lttng_condition_type type = lttng_evaluation_get_type(evaluation); |
36 | ||
37 | return type == LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW || | |
38 | type == LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH; | |
f42dcd79 JG |
39 | } |
40 | ||
41 | static | |
42 | void lttng_condition_buffer_usage_destroy(struct lttng_condition *condition) | |
43 | { | |
44 | struct lttng_condition_buffer_usage *usage; | |
45 | ||
46 | usage = container_of(condition, struct lttng_condition_buffer_usage, | |
47 | parent); | |
48 | ||
49 | free(usage->session_name); | |
50 | free(usage->channel_name); | |
51 | free(usage); | |
52 | } | |
53 | ||
54 | static | |
55 | bool lttng_condition_buffer_usage_validate(struct lttng_condition *condition) | |
56 | { | |
57 | bool valid = false; | |
58 | struct lttng_condition_buffer_usage *usage; | |
59 | ||
60 | if (!condition) { | |
61 | goto end; | |
62 | } | |
63 | ||
64 | usage = container_of(condition, struct lttng_condition_buffer_usage, | |
65 | parent); | |
66 | if (!usage->session_name) { | |
67 | goto end; | |
68 | } | |
69 | if (!usage->channel_name) { | |
70 | goto end; | |
71 | } | |
72 | if (!usage->threshold_percent.set && !usage->threshold_bytes.set) { | |
73 | goto end; | |
74 | } | |
75 | ||
76 | valid = true; | |
77 | end: | |
78 | return valid; | |
79 | } | |
80 | ||
81 | static | |
82 | struct lttng_condition *lttng_condition_buffer_usage_create( | |
83 | enum lttng_condition_type type) | |
84 | { | |
85 | struct lttng_condition_buffer_usage *condition; | |
86 | ||
87 | condition = zmalloc(sizeof(struct lttng_condition_buffer_usage)); | |
88 | if (!condition) { | |
89 | goto end; | |
90 | } | |
91 | ||
92 | condition->parent.type = type; | |
93 | condition->parent.validate = lttng_condition_buffer_usage_validate; | |
94 | condition->parent.destroy = lttng_condition_buffer_usage_destroy; | |
95 | end: | |
96 | return &condition->parent; | |
97 | } | |
98 | ||
99 | struct lttng_condition *lttng_condition_buffer_usage_low_create(void) | |
100 | { | |
101 | return lttng_condition_buffer_usage_create( | |
102 | LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW); | |
103 | } | |
104 | ||
105 | struct lttng_condition *lttng_condition_buffer_usage_high_create(void) | |
106 | { | |
107 | return lttng_condition_buffer_usage_create( | |
108 | LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH); | |
109 | } | |
110 | ||
111 | enum lttng_condition_status | |
112 | lttng_condition_buffer_usage_get_threshold_percentage( | |
113 | struct lttng_condition *condition, double *threshold_percent) | |
114 | { | |
115 | struct lttng_condition_buffer_usage *usage; | |
116 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
117 | ||
118 | if (!condition || !is_usage_condition(condition) || | |
119 | !threshold_percent) { | |
120 | status = LTTNG_CONDITION_STATUS_INVALID; | |
121 | goto end; | |
122 | } | |
123 | ||
124 | usage = container_of(condition, struct lttng_condition_buffer_usage, | |
125 | parent); | |
126 | if (!usage->threshold_percent.set) { | |
127 | status = LTTNG_CONDITION_STATUS_UNSET; | |
128 | goto end; | |
129 | } | |
130 | *threshold_percent = usage->threshold_percent.value; | |
131 | end: | |
132 | return status; | |
133 | } | |
134 | ||
135 | /* threshold_percent expressed as [0.0, 1.0]. */ | |
136 | enum lttng_condition_status | |
137 | lttng_condition_buffer_usage_set_threshold_percentage( | |
138 | struct lttng_condition *condition, double threshold_percent) | |
139 | { | |
140 | struct lttng_condition_buffer_usage *usage; | |
141 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
142 | ||
143 | if (!condition || !is_usage_condition(condition) || | |
144 | threshold_percent < 0.0 || threshold_percent > 1.0) { | |
145 | status = LTTNG_CONDITION_STATUS_INVALID; | |
146 | goto end; | |
147 | } | |
148 | ||
149 | usage = container_of(condition, struct lttng_condition_buffer_usage, | |
150 | parent); | |
151 | usage->threshold_percent.set = true; | |
152 | usage->threshold_bytes.set = false; | |
153 | usage->threshold_percent.value = threshold_percent; | |
154 | end: | |
155 | return status; | |
156 | } | |
157 | ||
158 | enum lttng_condition_status | |
159 | lttng_condition_buffer_usage_get_threshold( | |
160 | struct lttng_condition *condition, uint64_t *threshold_bytes) | |
161 | { | |
162 | struct lttng_condition_buffer_usage *usage; | |
163 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
164 | ||
165 | if (!condition || !is_usage_condition(condition) || !threshold_bytes) { | |
166 | status = LTTNG_CONDITION_STATUS_INVALID; | |
167 | goto end; | |
168 | } | |
169 | ||
170 | usage = container_of(condition, struct lttng_condition_buffer_usage, | |
171 | parent); | |
172 | if (!usage->threshold_bytes.set) { | |
173 | status = LTTNG_CONDITION_STATUS_UNSET; | |
174 | goto end; | |
175 | } | |
176 | *threshold_bytes = usage->threshold_bytes.value; | |
177 | end: | |
178 | return status; | |
179 | } | |
180 | ||
181 | enum lttng_condition_status | |
182 | lttng_condition_buffer_usage_set_threshold( | |
183 | struct lttng_condition *condition, uint64_t threshold_bytes) | |
184 | { | |
185 | struct lttng_condition_buffer_usage *usage; | |
186 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
187 | ||
188 | if (!condition || !is_usage_condition(condition)) { | |
189 | status = LTTNG_CONDITION_STATUS_INVALID; | |
190 | goto end; | |
191 | } | |
192 | ||
193 | usage = container_of(condition, struct lttng_condition_buffer_usage, | |
194 | parent); | |
195 | usage->threshold_percent.set = false; | |
196 | usage->threshold_bytes.set = true; | |
197 | usage->threshold_bytes.value = threshold_bytes; | |
198 | end: | |
199 | return status; | |
200 | } | |
201 | ||
202 | enum lttng_condition_status | |
203 | lttng_condition_buffer_usage_get_session_name( | |
204 | struct lttng_condition *condition, const char **session_name) | |
205 | { | |
206 | struct lttng_condition_buffer_usage *usage; | |
207 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
208 | ||
209 | if (!condition || !is_usage_condition(condition) || !session_name) { | |
210 | status = LTTNG_CONDITION_STATUS_INVALID; | |
211 | goto end; | |
212 | } | |
213 | ||
214 | usage = container_of(condition, struct lttng_condition_buffer_usage, | |
215 | parent); | |
216 | if (!usage->session_name) { | |
217 | status = LTTNG_CONDITION_STATUS_UNSET; | |
218 | goto end; | |
219 | } | |
220 | *session_name = usage->session_name; | |
221 | end: | |
222 | return status; | |
223 | } | |
224 | ||
225 | extern enum lttng_condition_status | |
226 | lttng_condition_buffer_usage_set_session_name( | |
227 | struct lttng_condition *condition, const char *session_name) | |
228 | { | |
229 | struct lttng_condition_buffer_usage *usage; | |
230 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
231 | ||
232 | if (!condition || !is_usage_condition(condition) || !session_name || | |
233 | strlen(session_name) == 0) { | |
234 | status = LTTNG_CONDITION_STATUS_INVALID; | |
235 | goto end; | |
236 | } | |
237 | ||
238 | usage = container_of(condition, struct lttng_condition_buffer_usage, | |
239 | parent); | |
240 | usage->session_name = strdup(session_name); | |
241 | if (!usage->session_name) { | |
242 | status = LTTNG_CONDITION_STATUS_ERROR; | |
243 | goto end; | |
244 | } | |
245 | end: | |
246 | return status; | |
247 | } | |
248 | ||
249 | enum lttng_condition_status | |
250 | lttng_condition_buffer_usage_get_channel_name( | |
251 | struct lttng_condition *condition, const char **channel_name) | |
252 | { | |
253 | struct lttng_condition_buffer_usage *usage; | |
254 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
255 | ||
256 | if (!condition || !is_usage_condition(condition) || !channel_name) { | |
257 | status = LTTNG_CONDITION_STATUS_INVALID; | |
258 | goto end; | |
259 | } | |
260 | ||
261 | usage = container_of(condition, struct lttng_condition_buffer_usage, | |
262 | parent); | |
263 | if (!usage->channel_name) { | |
264 | status = LTTNG_CONDITION_STATUS_UNSET; | |
265 | goto end; | |
266 | } | |
267 | *channel_name = usage->channel_name; | |
268 | end: | |
269 | return status; | |
270 | } | |
271 | ||
272 | extern enum lttng_condition_status | |
273 | lttng_condition_buffer_usage_set_channel_name( | |
274 | struct lttng_condition *condition, const char *channel_name) | |
275 | { | |
276 | struct lttng_condition_buffer_usage *usage; | |
277 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
278 | ||
279 | if (!condition || !is_usage_condition(condition) || !channel_name || | |
280 | strlen(channel_name) == 0) { | |
281 | status = LTTNG_CONDITION_STATUS_INVALID; | |
282 | goto end; | |
283 | } | |
284 | ||
285 | usage = container_of(condition, struct lttng_condition_buffer_usage, | |
286 | parent); | |
287 | usage->channel_name = strdup(channel_name); | |
288 | if (!usage->channel_name) { | |
289 | status = LTTNG_CONDITION_STATUS_ERROR; | |
290 | goto end; | |
291 | } | |
292 | end: | |
293 | return status; | |
294 | } | |
295 | ||
296 | extern enum lttng_condition_status | |
297 | lttng_condition_buffer_usage_get_domain_type( | |
298 | struct lttng_condition *condition, enum lttng_domain_type *type) | |
299 | { | |
300 | struct lttng_condition_buffer_usage *usage; | |
301 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
302 | ||
303 | if (!condition || !is_usage_condition(condition) || !type) { | |
304 | status = LTTNG_CONDITION_STATUS_INVALID; | |
305 | goto end; | |
306 | } | |
307 | ||
308 | usage = container_of(condition, struct lttng_condition_buffer_usage, | |
309 | parent); | |
310 | if (!usage->domain.set) { | |
311 | status = LTTNG_CONDITION_STATUS_UNSET; | |
312 | goto end; | |
313 | } | |
314 | *type = usage->domain.type; | |
315 | end: | |
316 | return status; | |
317 | } | |
318 | ||
319 | extern enum lttng_condition_status | |
320 | lttng_condition_buffer_usage_set_domain_type( | |
321 | struct lttng_condition *condition, enum lttng_domain_type type) | |
322 | { | |
323 | struct lttng_condition_buffer_usage *usage; | |
324 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
325 | ||
326 | if (!condition || !is_usage_condition(condition) || | |
327 | type == LTTNG_DOMAIN_NONE) { | |
328 | status = LTTNG_CONDITION_STATUS_INVALID; | |
329 | goto end; | |
330 | } | |
331 | ||
332 | usage = container_of(condition, struct lttng_condition_buffer_usage, | |
333 | parent); | |
334 | usage->domain.set = true; | |
335 | usage->domain.type = type; | |
336 | end: | |
337 | return status; | |
338 | } | |
e892d3f7 JG |
339 | |
340 | static | |
341 | void lttng_evaluation_buffer_usage_destroy( | |
342 | struct lttng_evaluation *evaluation) | |
343 | { | |
344 | struct lttng_evaluation_buffer_usage *usage; | |
345 | ||
346 | usage = container_of(evaluation, struct lttng_evaluation_buffer_usage, | |
347 | parent); | |
348 | free(usage); | |
349 | } | |
350 | ||
351 | LTTNG_HIDDEN | |
352 | struct lttng_evaluation *lttng_evaluation_buffer_usage_create(uint64_t use, | |
353 | uint64_t capacity) | |
354 | { | |
355 | struct lttng_evaluation_buffer_usage *usage; | |
356 | ||
357 | usage = zmalloc(sizeof(struct lttng_evaluation_buffer_usage)); | |
358 | if (!usage) { | |
359 | goto end; | |
360 | } | |
361 | ||
362 | usage->buffer_use = use; | |
363 | usage->buffer_capacity = capacity; | |
364 | usage->parent.destroy = lttng_evaluation_buffer_usage_destroy; | |
365 | end: | |
366 | return &usage->parent; | |
367 | } | |
368 | ||
369 | /* | |
370 | * Get the sampled buffer usage which caused the associated condition to | |
371 | * evaluate to "true". | |
372 | */ | |
373 | enum lttng_evaluation_status | |
374 | lttng_evaluation_buffer_usage_get_usage_percentage( | |
375 | struct lttng_evaluation *evaluation, double *usage_percent) | |
376 | { | |
377 | struct lttng_evaluation_buffer_usage *usage; | |
378 | enum lttng_evaluation_status status = LTTNG_EVALUATION_STATUS_OK; | |
379 | ||
380 | if (!evaluation || !is_usage_evaluation(evaluation) || !usage_percent) { | |
381 | status = LTTNG_EVALUATION_STATUS_INVALID; | |
382 | goto end; | |
383 | } | |
384 | ||
385 | usage = container_of(evaluation, struct lttng_evaluation_buffer_usage, | |
386 | parent); | |
387 | *usage_percent = (double) usage->buffer_use / | |
388 | (double) usage->buffer_capacity; | |
389 | end: | |
390 | return status; | |
391 | } | |
392 | ||
393 | enum lttng_evaluation_status | |
394 | lttng_evaluation_buffer_usage_get_usage(struct lttng_evaluation *evaluation, | |
395 | uint64_t *usage_bytes) | |
396 | { | |
397 | struct lttng_evaluation_buffer_usage *usage; | |
398 | enum lttng_evaluation_status status = LTTNG_EVALUATION_STATUS_OK; | |
399 | ||
400 | if (!evaluation || !is_usage_evaluation(evaluation) || !usage_bytes) { | |
401 | status = LTTNG_EVALUATION_STATUS_INVALID; | |
402 | goto end; | |
403 | } | |
404 | ||
405 | usage = container_of(evaluation, struct lttng_evaluation_buffer_usage, | |
406 | parent); | |
407 | *usage_bytes = usage->buffer_use; | |
408 | end: | |
409 | return status; | |
410 | } |