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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( | |
e8360425 JD |
261 | const struct lttng_buffer_view *view) |
262 | { | |
263 | const struct lttng_evaluation_session_consumed_size_comm *comm = | |
264 | (const struct lttng_evaluation_session_consumed_size_comm *) view->data; | |
265 | struct lttng_evaluation *evaluation = NULL; | |
266 | ||
267 | if (view->size < sizeof(*comm)) { | |
268 | goto end; | |
269 | } | |
270 | ||
5f2c1c0f | 271 | evaluation = lttng_evaluation_session_consumed_size_create( |
e8360425 JD |
272 | comm->session_consumed); |
273 | end: | |
274 | return evaluation; | |
275 | } | |
276 | ||
277 | LTTNG_HIDDEN | |
278 | ssize_t lttng_evaluation_session_consumed_size_create_from_buffer( | |
279 | const struct lttng_buffer_view *view, | |
280 | struct lttng_evaluation **_evaluation) | |
281 | { | |
282 | ssize_t ret; | |
283 | struct lttng_evaluation *evaluation = NULL; | |
284 | ||
285 | if (!_evaluation) { | |
286 | ret = -1; | |
287 | goto error; | |
288 | } | |
289 | ||
5f2c1c0f | 290 | evaluation = create_evaluation_from_buffer(view); |
e8360425 JD |
291 | if (!evaluation) { |
292 | ret = -1; | |
293 | goto error; | |
294 | } | |
295 | ||
296 | *_evaluation = evaluation; | |
297 | ret = sizeof(struct lttng_evaluation_session_consumed_size_comm); | |
298 | return ret; | |
299 | error: | |
300 | lttng_evaluation_destroy(evaluation); | |
301 | return ret; | |
302 | } | |
303 | ||
304 | enum lttng_condition_status | |
305 | lttng_condition_session_consumed_size_get_threshold( | |
306 | const struct lttng_condition *condition, | |
307 | uint64_t *consumed_threshold_bytes) | |
308 | { | |
309 | struct lttng_condition_session_consumed_size *consumed; | |
310 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
311 | ||
312 | if (!condition || !IS_CONSUMED_SIZE_CONDITION(condition) || !consumed_threshold_bytes) { | |
313 | status = LTTNG_CONDITION_STATUS_INVALID; | |
314 | goto end; | |
315 | } | |
316 | ||
317 | consumed = container_of(condition, struct lttng_condition_session_consumed_size, | |
318 | parent); | |
319 | if (!consumed->consumed_threshold_bytes.set) { | |
320 | status = LTTNG_CONDITION_STATUS_UNSET; | |
321 | goto end; | |
322 | } | |
323 | *consumed_threshold_bytes = consumed->consumed_threshold_bytes.value; | |
324 | end: | |
325 | return status; | |
326 | } | |
327 | ||
328 | enum lttng_condition_status | |
329 | lttng_condition_session_consumed_size_set_threshold( | |
330 | struct lttng_condition *condition, uint64_t consumed_threshold_bytes) | |
331 | { | |
332 | struct lttng_condition_session_consumed_size *consumed; | |
333 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
334 | ||
335 | if (!condition || !IS_CONSUMED_SIZE_CONDITION(condition)) { | |
336 | status = LTTNG_CONDITION_STATUS_INVALID; | |
337 | goto end; | |
338 | } | |
339 | ||
340 | consumed = container_of(condition, struct lttng_condition_session_consumed_size, | |
341 | parent); | |
342 | consumed->consumed_threshold_bytes.set = true; | |
343 | consumed->consumed_threshold_bytes.value = consumed_threshold_bytes; | |
344 | end: | |
345 | return status; | |
346 | } | |
347 | ||
348 | enum lttng_condition_status | |
349 | lttng_condition_session_consumed_size_get_session_name( | |
350 | const struct lttng_condition *condition, | |
351 | const char **session_name) | |
352 | { | |
353 | struct lttng_condition_session_consumed_size *consumed; | |
354 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
355 | ||
356 | if (!condition || !IS_CONSUMED_SIZE_CONDITION(condition) || !session_name) { | |
357 | status = LTTNG_CONDITION_STATUS_INVALID; | |
358 | goto end; | |
359 | } | |
360 | ||
361 | consumed = container_of(condition, struct lttng_condition_session_consumed_size, | |
362 | parent); | |
363 | if (!consumed->session_name) { | |
364 | status = LTTNG_CONDITION_STATUS_UNSET; | |
365 | goto end; | |
366 | } | |
367 | *session_name = consumed->session_name; | |
368 | end: | |
369 | return status; | |
370 | } | |
371 | ||
372 | enum lttng_condition_status | |
373 | lttng_condition_session_consumed_size_set_session_name( | |
374 | struct lttng_condition *condition, const char *session_name) | |
375 | { | |
376 | char *session_name_copy; | |
377 | struct lttng_condition_session_consumed_size *consumed; | |
378 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
379 | ||
380 | if (!condition || !IS_CONSUMED_SIZE_CONDITION(condition) || | |
381 | !session_name || strlen(session_name) == 0) { | |
382 | status = LTTNG_CONDITION_STATUS_INVALID; | |
383 | goto end; | |
384 | } | |
385 | ||
386 | consumed = container_of(condition, struct lttng_condition_session_consumed_size, | |
387 | parent); | |
388 | session_name_copy = strdup(session_name); | |
389 | if (!session_name_copy) { | |
390 | status = LTTNG_CONDITION_STATUS_ERROR; | |
391 | goto end; | |
392 | } | |
393 | ||
394 | if (consumed->session_name) { | |
395 | free(consumed->session_name); | |
396 | } | |
397 | consumed->session_name = session_name_copy; | |
398 | end: | |
399 | return status; | |
400 | } | |
401 | ||
402 | static | |
3647288f JG |
403 | int lttng_evaluation_session_consumed_size_serialize( |
404 | struct lttng_evaluation *evaluation, | |
405 | struct lttng_dynamic_buffer *buf) | |
e8360425 | 406 | { |
e8360425 | 407 | struct lttng_evaluation_session_consumed_size *consumed; |
3647288f | 408 | struct lttng_evaluation_session_consumed_size_comm comm; |
e8360425 JD |
409 | |
410 | consumed = container_of(evaluation, struct lttng_evaluation_session_consumed_size, | |
411 | parent); | |
3647288f JG |
412 | comm.session_consumed = consumed->session_consumed; |
413 | return lttng_dynamic_buffer_append(buf, &comm, sizeof(comm)); | |
e8360425 JD |
414 | } |
415 | ||
416 | static | |
417 | void lttng_evaluation_session_consumed_size_destroy( | |
418 | struct lttng_evaluation *evaluation) | |
419 | { | |
420 | struct lttng_evaluation_session_consumed_size *consumed; | |
421 | ||
422 | consumed = container_of(evaluation, struct lttng_evaluation_session_consumed_size, | |
423 | parent); | |
424 | free(consumed); | |
425 | } | |
426 | ||
427 | LTTNG_HIDDEN | |
428 | struct lttng_evaluation *lttng_evaluation_session_consumed_size_create( | |
5f2c1c0f | 429 | uint64_t consumed) |
e8360425 JD |
430 | { |
431 | struct lttng_evaluation_session_consumed_size *consumed_eval; | |
432 | ||
433 | consumed_eval = zmalloc(sizeof(struct lttng_evaluation_session_consumed_size)); | |
434 | if (!consumed_eval) { | |
435 | goto end; | |
436 | } | |
437 | ||
5f2c1c0f | 438 | consumed_eval->parent.type = LTTNG_CONDITION_TYPE_SESSION_CONSUMED_SIZE; |
e8360425 JD |
439 | consumed_eval->session_consumed = consumed; |
440 | consumed_eval->parent.serialize = lttng_evaluation_session_consumed_size_serialize; | |
441 | consumed_eval->parent.destroy = lttng_evaluation_session_consumed_size_destroy; | |
442 | end: | |
443 | return &consumed_eval->parent; | |
444 | } | |
445 | ||
446 | enum lttng_evaluation_status | |
447 | lttng_evaluation_session_consumed_size_get_consumed_size( | |
448 | const struct lttng_evaluation *evaluation, | |
449 | uint64_t *session_consumed) | |
450 | { | |
451 | struct lttng_evaluation_session_consumed_size *consumed; | |
452 | enum lttng_evaluation_status status = LTTNG_EVALUATION_STATUS_OK; | |
453 | ||
454 | if (!evaluation || !IS_CONSUMED_SIZE_EVALUATION(evaluation) || | |
455 | !session_consumed) { | |
456 | status = LTTNG_EVALUATION_STATUS_INVALID; | |
457 | goto end; | |
458 | } | |
459 | ||
460 | consumed = container_of(evaluation, struct lttng_evaluation_session_consumed_size, | |
461 | parent); | |
462 | *session_consumed = consumed->session_consumed; | |
463 | end: | |
464 | return status; | |
465 | } |