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e8360425 JD |
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/session-consumed-size-internal.h> | |
319370bd | 20 | #include <lttng/constant.h> |
e8360425 JD |
21 | #include <common/macros.h> |
22 | #include <common/error.h> | |
23 | #include <assert.h> | |
24 | #include <math.h> | |
25 | #include <float.h> | |
26 | #include <time.h> | |
27 | ||
28 | #define IS_CONSUMED_SIZE_CONDITION(condition) ( \ | |
29 | lttng_condition_get_type(condition) == LTTNG_CONDITION_TYPE_SESSION_CONSUMED_SIZE \ | |
30 | ) | |
31 | ||
32 | #define IS_CONSUMED_SIZE_EVALUATION(evaluation) ( \ | |
33 | lttng_evaluation_get_type(evaluation) == LTTNG_CONDITION_TYPE_SESSION_CONSUMED_SIZE \ | |
34 | ) | |
35 | ||
36 | static | |
37 | void lttng_condition_session_consumed_size_destroy(struct lttng_condition *condition) | |
38 | { | |
39 | struct lttng_condition_session_consumed_size *consumed_size; | |
40 | ||
41 | consumed_size = container_of(condition, | |
42 | struct lttng_condition_session_consumed_size, parent); | |
43 | ||
44 | free(consumed_size->session_name); | |
45 | free(consumed_size); | |
46 | } | |
47 | ||
48 | static | |
49 | bool lttng_condition_session_consumed_size_validate( | |
50 | const struct lttng_condition *condition) | |
51 | { | |
52 | bool valid = false; | |
53 | struct lttng_condition_session_consumed_size *consumed; | |
54 | ||
55 | if (!condition) { | |
56 | goto end; | |
57 | } | |
58 | ||
59 | consumed = container_of(condition, struct lttng_condition_session_consumed_size, | |
60 | parent); | |
61 | if (!consumed->session_name) { | |
62 | ERR("Invalid buffer condition: a target session name must be set."); | |
63 | goto end; | |
64 | } | |
65 | if (!consumed->consumed_threshold_bytes.set) { | |
66 | ERR("Invalid session condition: a threshold must be set."); | |
67 | goto end; | |
68 | } | |
69 | ||
70 | valid = true; | |
71 | end: | |
72 | return valid; | |
73 | } | |
74 | ||
75 | static | |
3647288f JG |
76 | int lttng_condition_session_consumed_size_serialize( |
77 | const struct lttng_condition *condition, | |
78 | struct lttng_dynamic_buffer *buf) | |
e8360425 | 79 | { |
3647288f | 80 | int ret; |
e8360425 | 81 | size_t session_name_len; |
3647288f JG |
82 | struct lttng_condition_session_consumed_size *consumed; |
83 | struct lttng_condition_session_consumed_size_comm consumed_comm; | |
e8360425 JD |
84 | |
85 | if (!condition || !IS_CONSUMED_SIZE_CONDITION(condition)) { | |
86 | ret = -1; | |
87 | goto end; | |
88 | } | |
89 | ||
3647288f JG |
90 | DBG("Serializing session consumed size condition"); |
91 | consumed = container_of(condition, | |
92 | struct lttng_condition_session_consumed_size, | |
e8360425 | 93 | parent); |
3647288f | 94 | |
e8360425 JD |
95 | session_name_len = strlen(consumed->session_name) + 1; |
96 | if (session_name_len > LTTNG_NAME_MAX) { | |
97 | ret = -1; | |
98 | goto end; | |
99 | } | |
3647288f JG |
100 | |
101 | consumed_comm.consumed_threshold_bytes = | |
102 | consumed->consumed_threshold_bytes.value; | |
103 | consumed_comm.session_name_len = (uint32_t) session_name_len; | |
104 | ||
105 | ret = lttng_dynamic_buffer_append(buf, &consumed_comm, | |
106 | sizeof(consumed_comm)); | |
107 | if (ret) { | |
108 | goto end; | |
109 | } | |
110 | ret = lttng_dynamic_buffer_append(buf, consumed->session_name, | |
111 | session_name_len); | |
112 | if (ret) { | |
113 | goto end; | |
e8360425 | 114 | } |
e8360425 JD |
115 | end: |
116 | return ret; | |
117 | } | |
118 | ||
119 | static | |
120 | bool lttng_condition_session_consumed_size_is_equal(const struct lttng_condition *_a, | |
121 | const struct lttng_condition *_b) | |
122 | { | |
123 | bool is_equal = false; | |
124 | struct lttng_condition_session_consumed_size *a, *b; | |
125 | ||
126 | a = container_of(_a, struct lttng_condition_session_consumed_size, parent); | |
127 | b = container_of(_b, struct lttng_condition_session_consumed_size, parent); | |
128 | ||
129 | if (a->consumed_threshold_bytes.set && b->consumed_threshold_bytes.set) { | |
130 | uint64_t a_value, b_value; | |
131 | ||
132 | a_value = a->consumed_threshold_bytes.value; | |
133 | b_value = b->consumed_threshold_bytes.value; | |
134 | if (a_value != b_value) { | |
135 | goto end; | |
136 | } | |
137 | } | |
138 | ||
139 | if ((a->session_name && !b->session_name) || | |
140 | (!a->session_name && b->session_name)) { | |
141 | goto end; | |
142 | } | |
143 | ||
144 | is_equal = true; | |
145 | end: | |
146 | return is_equal; | |
147 | } | |
148 | ||
149 | struct lttng_condition *lttng_condition_session_consumed_size_create(void) | |
150 | { | |
151 | struct lttng_condition_session_consumed_size *condition; | |
152 | ||
153 | condition = zmalloc(sizeof(struct lttng_condition_session_consumed_size)); | |
154 | if (!condition) { | |
155 | return NULL; | |
156 | } | |
157 | ||
158 | lttng_condition_init(&condition->parent, LTTNG_CONDITION_TYPE_SESSION_CONSUMED_SIZE); | |
159 | condition->parent.validate = lttng_condition_session_consumed_size_validate; | |
160 | condition->parent.serialize = lttng_condition_session_consumed_size_serialize; | |
161 | condition->parent.equal = lttng_condition_session_consumed_size_is_equal; | |
162 | condition->parent.destroy = lttng_condition_session_consumed_size_destroy; | |
163 | return &condition->parent; | |
164 | } | |
165 | ||
166 | static | |
167 | ssize_t init_condition_from_buffer(struct lttng_condition *condition, | |
168 | const struct lttng_buffer_view *src_view) | |
169 | { | |
170 | ssize_t ret, condition_size; | |
171 | enum lttng_condition_status status; | |
172 | const struct lttng_condition_session_consumed_size_comm *condition_comm; | |
173 | const char *session_name; | |
174 | struct lttng_buffer_view names_view; | |
175 | ||
176 | if (src_view->size < sizeof(*condition_comm)) { | |
177 | ERR("Failed to initialize from malformed condition buffer: buffer too short to contain header"); | |
178 | ret = -1; | |
179 | goto end; | |
180 | } | |
181 | ||
182 | condition_comm = (const struct lttng_condition_session_consumed_size_comm *) src_view->data; | |
183 | names_view = lttng_buffer_view_from_view(src_view, | |
184 | sizeof(*condition_comm), -1); | |
185 | ||
186 | if (condition_comm->session_name_len > LTTNG_NAME_MAX) { | |
187 | ERR("Failed to initialize from malformed condition buffer: name exceeds LTTNG_MAX_NAME"); | |
188 | ret = -1; | |
189 | goto end; | |
190 | } | |
191 | ||
192 | if (names_view.size < condition_comm->session_name_len) { | |
193 | ERR("Failed to initialize from malformed condition buffer: buffer too short to contain element names"); | |
194 | ret = -1; | |
195 | goto end; | |
196 | } | |
197 | ||
198 | status = lttng_condition_session_consumed_size_set_threshold(condition, | |
199 | condition_comm->consumed_threshold_bytes); | |
200 | if (status != LTTNG_CONDITION_STATUS_OK) { | |
201 | ERR("Failed to initialize session consumed condition threshold"); | |
202 | ret = -1; | |
203 | goto end; | |
204 | } | |
205 | ||
206 | session_name = names_view.data; | |
207 | if (*(session_name + condition_comm->session_name_len - 1) != '\0') { | |
208 | ERR("Malformed session name encountered in condition buffer"); | |
209 | ret = -1; | |
210 | goto end; | |
211 | } | |
212 | ||
213 | status = lttng_condition_session_consumed_size_set_session_name(condition, | |
214 | session_name); | |
215 | if (status != LTTNG_CONDITION_STATUS_OK) { | |
216 | ERR("Failed to set buffer consumed session name"); | |
217 | ret = -1; | |
218 | goto end; | |
219 | } | |
220 | ||
221 | if (!lttng_condition_validate(condition)) { | |
222 | ret = -1; | |
223 | goto end; | |
224 | } | |
225 | ||
226 | condition_size = sizeof(*condition_comm) + | |
227 | (ssize_t) condition_comm->session_name_len; | |
228 | ret = condition_size; | |
229 | end: | |
230 | return ret; | |
231 | } | |
232 | ||
233 | LTTNG_HIDDEN | |
234 | ssize_t lttng_condition_session_consumed_size_create_from_buffer( | |
235 | const struct lttng_buffer_view *view, | |
236 | struct lttng_condition **_condition) | |
237 | { | |
238 | ssize_t ret; | |
239 | struct lttng_condition *condition = | |
240 | lttng_condition_session_consumed_size_create(); | |
241 | ||
242 | if (!_condition || !condition) { | |
243 | ret = -1; | |
244 | goto error; | |
245 | } | |
246 | ||
247 | ret = init_condition_from_buffer(condition, view); | |
248 | if (ret < 0) { | |
249 | goto error; | |
250 | } | |
251 | ||
252 | *_condition = condition; | |
253 | return ret; | |
254 | error: | |
255 | lttng_condition_destroy(condition); | |
256 | return ret; | |
257 | } | |
258 | ||
259 | static | |
260 | struct lttng_evaluation *create_evaluation_from_buffer( | |
261 | enum lttng_condition_type type, | |
262 | const struct lttng_buffer_view *view) | |
263 | { | |
264 | const struct lttng_evaluation_session_consumed_size_comm *comm = | |
265 | (const struct lttng_evaluation_session_consumed_size_comm *) view->data; | |
266 | struct lttng_evaluation *evaluation = NULL; | |
267 | ||
268 | if (view->size < sizeof(*comm)) { | |
269 | goto end; | |
270 | } | |
271 | ||
272 | evaluation = lttng_evaluation_session_consumed_size_create(type, | |
273 | comm->session_consumed); | |
274 | end: | |
275 | return evaluation; | |
276 | } | |
277 | ||
278 | LTTNG_HIDDEN | |
279 | ssize_t lttng_evaluation_session_consumed_size_create_from_buffer( | |
280 | const struct lttng_buffer_view *view, | |
281 | struct lttng_evaluation **_evaluation) | |
282 | { | |
283 | ssize_t ret; | |
284 | struct lttng_evaluation *evaluation = NULL; | |
285 | ||
286 | if (!_evaluation) { | |
287 | ret = -1; | |
288 | goto error; | |
289 | } | |
290 | ||
291 | evaluation = create_evaluation_from_buffer( | |
292 | LTTNG_CONDITION_TYPE_SESSION_CONSUMED_SIZE, view); | |
293 | if (!evaluation) { | |
294 | ret = -1; | |
295 | goto error; | |
296 | } | |
297 | ||
298 | *_evaluation = evaluation; | |
299 | ret = sizeof(struct lttng_evaluation_session_consumed_size_comm); | |
300 | return ret; | |
301 | error: | |
302 | lttng_evaluation_destroy(evaluation); | |
303 | return ret; | |
304 | } | |
305 | ||
306 | enum lttng_condition_status | |
307 | lttng_condition_session_consumed_size_get_threshold( | |
308 | const struct lttng_condition *condition, | |
309 | uint64_t *consumed_threshold_bytes) | |
310 | { | |
311 | struct lttng_condition_session_consumed_size *consumed; | |
312 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
313 | ||
314 | if (!condition || !IS_CONSUMED_SIZE_CONDITION(condition) || !consumed_threshold_bytes) { | |
315 | status = LTTNG_CONDITION_STATUS_INVALID; | |
316 | goto end; | |
317 | } | |
318 | ||
319 | consumed = container_of(condition, struct lttng_condition_session_consumed_size, | |
320 | parent); | |
321 | if (!consumed->consumed_threshold_bytes.set) { | |
322 | status = LTTNG_CONDITION_STATUS_UNSET; | |
323 | goto end; | |
324 | } | |
325 | *consumed_threshold_bytes = consumed->consumed_threshold_bytes.value; | |
326 | end: | |
327 | return status; | |
328 | } | |
329 | ||
330 | enum lttng_condition_status | |
331 | lttng_condition_session_consumed_size_set_threshold( | |
332 | struct lttng_condition *condition, uint64_t consumed_threshold_bytes) | |
333 | { | |
334 | struct lttng_condition_session_consumed_size *consumed; | |
335 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
336 | ||
337 | if (!condition || !IS_CONSUMED_SIZE_CONDITION(condition)) { | |
338 | status = LTTNG_CONDITION_STATUS_INVALID; | |
339 | goto end; | |
340 | } | |
341 | ||
342 | consumed = container_of(condition, struct lttng_condition_session_consumed_size, | |
343 | parent); | |
344 | consumed->consumed_threshold_bytes.set = true; | |
345 | consumed->consumed_threshold_bytes.value = consumed_threshold_bytes; | |
346 | end: | |
347 | return status; | |
348 | } | |
349 | ||
350 | enum lttng_condition_status | |
351 | lttng_condition_session_consumed_size_get_session_name( | |
352 | const struct lttng_condition *condition, | |
353 | const char **session_name) | |
354 | { | |
355 | struct lttng_condition_session_consumed_size *consumed; | |
356 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
357 | ||
358 | if (!condition || !IS_CONSUMED_SIZE_CONDITION(condition) || !session_name) { | |
359 | status = LTTNG_CONDITION_STATUS_INVALID; | |
360 | goto end; | |
361 | } | |
362 | ||
363 | consumed = container_of(condition, struct lttng_condition_session_consumed_size, | |
364 | parent); | |
365 | if (!consumed->session_name) { | |
366 | status = LTTNG_CONDITION_STATUS_UNSET; | |
367 | goto end; | |
368 | } | |
369 | *session_name = consumed->session_name; | |
370 | end: | |
371 | return status; | |
372 | } | |
373 | ||
374 | enum lttng_condition_status | |
375 | lttng_condition_session_consumed_size_set_session_name( | |
376 | struct lttng_condition *condition, const char *session_name) | |
377 | { | |
378 | char *session_name_copy; | |
379 | struct lttng_condition_session_consumed_size *consumed; | |
380 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
381 | ||
382 | if (!condition || !IS_CONSUMED_SIZE_CONDITION(condition) || | |
383 | !session_name || strlen(session_name) == 0) { | |
384 | status = LTTNG_CONDITION_STATUS_INVALID; | |
385 | goto end; | |
386 | } | |
387 | ||
388 | consumed = container_of(condition, struct lttng_condition_session_consumed_size, | |
389 | parent); | |
390 | session_name_copy = strdup(session_name); | |
391 | if (!session_name_copy) { | |
392 | status = LTTNG_CONDITION_STATUS_ERROR; | |
393 | goto end; | |
394 | } | |
395 | ||
396 | if (consumed->session_name) { | |
397 | free(consumed->session_name); | |
398 | } | |
399 | consumed->session_name = session_name_copy; | |
400 | end: | |
401 | return status; | |
402 | } | |
403 | ||
404 | static | |
3647288f JG |
405 | int lttng_evaluation_session_consumed_size_serialize( |
406 | struct lttng_evaluation *evaluation, | |
407 | struct lttng_dynamic_buffer *buf) | |
e8360425 | 408 | { |
e8360425 | 409 | struct lttng_evaluation_session_consumed_size *consumed; |
3647288f | 410 | struct lttng_evaluation_session_consumed_size_comm comm; |
e8360425 JD |
411 | |
412 | consumed = container_of(evaluation, struct lttng_evaluation_session_consumed_size, | |
413 | parent); | |
3647288f JG |
414 | comm.session_consumed = consumed->session_consumed; |
415 | return lttng_dynamic_buffer_append(buf, &comm, sizeof(comm)); | |
e8360425 JD |
416 | } |
417 | ||
418 | static | |
419 | void lttng_evaluation_session_consumed_size_destroy( | |
420 | struct lttng_evaluation *evaluation) | |
421 | { | |
422 | struct lttng_evaluation_session_consumed_size *consumed; | |
423 | ||
424 | consumed = container_of(evaluation, struct lttng_evaluation_session_consumed_size, | |
425 | parent); | |
426 | free(consumed); | |
427 | } | |
428 | ||
429 | LTTNG_HIDDEN | |
430 | struct lttng_evaluation *lttng_evaluation_session_consumed_size_create( | |
431 | enum lttng_condition_type type, uint64_t consumed) | |
432 | { | |
433 | struct lttng_evaluation_session_consumed_size *consumed_eval; | |
434 | ||
435 | consumed_eval = zmalloc(sizeof(struct lttng_evaluation_session_consumed_size)); | |
436 | if (!consumed_eval) { | |
437 | goto end; | |
438 | } | |
439 | ||
440 | consumed_eval->parent.type = type; | |
441 | consumed_eval->session_consumed = consumed; | |
442 | consumed_eval->parent.serialize = lttng_evaluation_session_consumed_size_serialize; | |
443 | consumed_eval->parent.destroy = lttng_evaluation_session_consumed_size_destroy; | |
444 | end: | |
445 | return &consumed_eval->parent; | |
446 | } | |
447 | ||
448 | enum lttng_evaluation_status | |
449 | lttng_evaluation_session_consumed_size_get_consumed_size( | |
450 | const struct lttng_evaluation *evaluation, | |
451 | uint64_t *session_consumed) | |
452 | { | |
453 | struct lttng_evaluation_session_consumed_size *consumed; | |
454 | enum lttng_evaluation_status status = LTTNG_EVALUATION_STATUS_OK; | |
455 | ||
456 | if (!evaluation || !IS_CONSUMED_SIZE_EVALUATION(evaluation) || | |
457 | !session_consumed) { | |
458 | status = LTTNG_EVALUATION_STATUS_INVALID; | |
459 | goto end; | |
460 | } | |
461 | ||
462 | consumed = container_of(evaluation, struct lttng_evaluation_session_consumed_size, | |
463 | parent); | |
464 | *session_consumed = consumed->session_consumed; | |
465 | end: | |
466 | return status; | |
467 | } |