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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 | |
76 | ssize_t lttng_condition_session_consumed_size_serialize( | |
77 | const struct lttng_condition *condition, char *buf) | |
78 | { | |
79 | struct lttng_condition_session_consumed_size *consumed; | |
80 | ssize_t ret, size; | |
81 | size_t session_name_len; | |
82 | ||
83 | if (!condition || !IS_CONSUMED_SIZE_CONDITION(condition)) { | |
84 | ret = -1; | |
85 | goto end; | |
86 | } | |
87 | ||
88 | DBG("Serializing session consumed condition"); | |
89 | consumed = container_of(condition, struct lttng_condition_session_consumed_size, | |
90 | parent); | |
91 | size = sizeof(struct lttng_condition_session_consumed_size_comm); | |
92 | session_name_len = strlen(consumed->session_name) + 1; | |
93 | if (session_name_len > LTTNG_NAME_MAX) { | |
94 | ret = -1; | |
95 | goto end; | |
96 | } | |
97 | size += session_name_len; | |
98 | if (buf) { | |
99 | struct lttng_condition_session_consumed_size_comm consumed_comm = { | |
100 | .consumed_threshold_bytes = consumed->consumed_threshold_bytes.value, | |
101 | .session_name_len = session_name_len, | |
102 | }; | |
103 | ||
104 | memcpy(buf, &consumed_comm, sizeof(consumed_comm)); | |
105 | buf += sizeof(consumed_comm); | |
106 | memcpy(buf, consumed->session_name, session_name_len); | |
107 | buf += session_name_len; | |
108 | } | |
109 | ret = size; | |
110 | end: | |
111 | return ret; | |
112 | } | |
113 | ||
114 | static | |
115 | bool lttng_condition_session_consumed_size_is_equal(const struct lttng_condition *_a, | |
116 | const struct lttng_condition *_b) | |
117 | { | |
118 | bool is_equal = false; | |
119 | struct lttng_condition_session_consumed_size *a, *b; | |
120 | ||
121 | a = container_of(_a, struct lttng_condition_session_consumed_size, parent); | |
122 | b = container_of(_b, struct lttng_condition_session_consumed_size, parent); | |
123 | ||
124 | if (a->consumed_threshold_bytes.set && b->consumed_threshold_bytes.set) { | |
125 | uint64_t a_value, b_value; | |
126 | ||
127 | a_value = a->consumed_threshold_bytes.value; | |
128 | b_value = b->consumed_threshold_bytes.value; | |
129 | if (a_value != b_value) { | |
130 | goto end; | |
131 | } | |
132 | } | |
133 | ||
134 | if ((a->session_name && !b->session_name) || | |
135 | (!a->session_name && b->session_name)) { | |
136 | goto end; | |
137 | } | |
138 | ||
139 | is_equal = true; | |
140 | end: | |
141 | return is_equal; | |
142 | } | |
143 | ||
144 | struct lttng_condition *lttng_condition_session_consumed_size_create(void) | |
145 | { | |
146 | struct lttng_condition_session_consumed_size *condition; | |
147 | ||
148 | condition = zmalloc(sizeof(struct lttng_condition_session_consumed_size)); | |
149 | if (!condition) { | |
150 | return NULL; | |
151 | } | |
152 | ||
153 | lttng_condition_init(&condition->parent, LTTNG_CONDITION_TYPE_SESSION_CONSUMED_SIZE); | |
154 | condition->parent.validate = lttng_condition_session_consumed_size_validate; | |
155 | condition->parent.serialize = lttng_condition_session_consumed_size_serialize; | |
156 | condition->parent.equal = lttng_condition_session_consumed_size_is_equal; | |
157 | condition->parent.destroy = lttng_condition_session_consumed_size_destroy; | |
158 | return &condition->parent; | |
159 | } | |
160 | ||
161 | static | |
162 | ssize_t init_condition_from_buffer(struct lttng_condition *condition, | |
163 | const struct lttng_buffer_view *src_view) | |
164 | { | |
165 | ssize_t ret, condition_size; | |
166 | enum lttng_condition_status status; | |
167 | const struct lttng_condition_session_consumed_size_comm *condition_comm; | |
168 | const char *session_name; | |
169 | struct lttng_buffer_view names_view; | |
170 | ||
171 | if (src_view->size < sizeof(*condition_comm)) { | |
172 | ERR("Failed to initialize from malformed condition buffer: buffer too short to contain header"); | |
173 | ret = -1; | |
174 | goto end; | |
175 | } | |
176 | ||
177 | condition_comm = (const struct lttng_condition_session_consumed_size_comm *) src_view->data; | |
178 | names_view = lttng_buffer_view_from_view(src_view, | |
179 | sizeof(*condition_comm), -1); | |
180 | ||
181 | if (condition_comm->session_name_len > LTTNG_NAME_MAX) { | |
182 | ERR("Failed to initialize from malformed condition buffer: name exceeds LTTNG_MAX_NAME"); | |
183 | ret = -1; | |
184 | goto end; | |
185 | } | |
186 | ||
187 | if (names_view.size < condition_comm->session_name_len) { | |
188 | ERR("Failed to initialize from malformed condition buffer: buffer too short to contain element names"); | |
189 | ret = -1; | |
190 | goto end; | |
191 | } | |
192 | ||
193 | status = lttng_condition_session_consumed_size_set_threshold(condition, | |
194 | condition_comm->consumed_threshold_bytes); | |
195 | if (status != LTTNG_CONDITION_STATUS_OK) { | |
196 | ERR("Failed to initialize session consumed condition threshold"); | |
197 | ret = -1; | |
198 | goto end; | |
199 | } | |
200 | ||
201 | session_name = names_view.data; | |
202 | if (*(session_name + condition_comm->session_name_len - 1) != '\0') { | |
203 | ERR("Malformed session name encountered in condition buffer"); | |
204 | ret = -1; | |
205 | goto end; | |
206 | } | |
207 | ||
208 | status = lttng_condition_session_consumed_size_set_session_name(condition, | |
209 | session_name); | |
210 | if (status != LTTNG_CONDITION_STATUS_OK) { | |
211 | ERR("Failed to set buffer consumed session name"); | |
212 | ret = -1; | |
213 | goto end; | |
214 | } | |
215 | ||
216 | if (!lttng_condition_validate(condition)) { | |
217 | ret = -1; | |
218 | goto end; | |
219 | } | |
220 | ||
221 | condition_size = sizeof(*condition_comm) + | |
222 | (ssize_t) condition_comm->session_name_len; | |
223 | ret = condition_size; | |
224 | end: | |
225 | return ret; | |
226 | } | |
227 | ||
228 | LTTNG_HIDDEN | |
229 | ssize_t lttng_condition_session_consumed_size_create_from_buffer( | |
230 | const struct lttng_buffer_view *view, | |
231 | struct lttng_condition **_condition) | |
232 | { | |
233 | ssize_t ret; | |
234 | struct lttng_condition *condition = | |
235 | lttng_condition_session_consumed_size_create(); | |
236 | ||
237 | if (!_condition || !condition) { | |
238 | ret = -1; | |
239 | goto error; | |
240 | } | |
241 | ||
242 | ret = init_condition_from_buffer(condition, view); | |
243 | if (ret < 0) { | |
244 | goto error; | |
245 | } | |
246 | ||
247 | *_condition = condition; | |
248 | return ret; | |
249 | error: | |
250 | lttng_condition_destroy(condition); | |
251 | return ret; | |
252 | } | |
253 | ||
254 | static | |
255 | struct lttng_evaluation *create_evaluation_from_buffer( | |
256 | enum lttng_condition_type type, | |
257 | const struct lttng_buffer_view *view) | |
258 | { | |
259 | const struct lttng_evaluation_session_consumed_size_comm *comm = | |
260 | (const struct lttng_evaluation_session_consumed_size_comm *) view->data; | |
261 | struct lttng_evaluation *evaluation = NULL; | |
262 | ||
263 | if (view->size < sizeof(*comm)) { | |
264 | goto end; | |
265 | } | |
266 | ||
267 | evaluation = lttng_evaluation_session_consumed_size_create(type, | |
268 | comm->session_consumed); | |
269 | end: | |
270 | return evaluation; | |
271 | } | |
272 | ||
273 | LTTNG_HIDDEN | |
274 | ssize_t lttng_evaluation_session_consumed_size_create_from_buffer( | |
275 | const struct lttng_buffer_view *view, | |
276 | struct lttng_evaluation **_evaluation) | |
277 | { | |
278 | ssize_t ret; | |
279 | struct lttng_evaluation *evaluation = NULL; | |
280 | ||
281 | if (!_evaluation) { | |
282 | ret = -1; | |
283 | goto error; | |
284 | } | |
285 | ||
286 | evaluation = create_evaluation_from_buffer( | |
287 | LTTNG_CONDITION_TYPE_SESSION_CONSUMED_SIZE, view); | |
288 | if (!evaluation) { | |
289 | ret = -1; | |
290 | goto error; | |
291 | } | |
292 | ||
293 | *_evaluation = evaluation; | |
294 | ret = sizeof(struct lttng_evaluation_session_consumed_size_comm); | |
295 | return ret; | |
296 | error: | |
297 | lttng_evaluation_destroy(evaluation); | |
298 | return ret; | |
299 | } | |
300 | ||
301 | enum lttng_condition_status | |
302 | lttng_condition_session_consumed_size_get_threshold( | |
303 | const struct lttng_condition *condition, | |
304 | uint64_t *consumed_threshold_bytes) | |
305 | { | |
306 | struct lttng_condition_session_consumed_size *consumed; | |
307 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
308 | ||
309 | if (!condition || !IS_CONSUMED_SIZE_CONDITION(condition) || !consumed_threshold_bytes) { | |
310 | status = LTTNG_CONDITION_STATUS_INVALID; | |
311 | goto end; | |
312 | } | |
313 | ||
314 | consumed = container_of(condition, struct lttng_condition_session_consumed_size, | |
315 | parent); | |
316 | if (!consumed->consumed_threshold_bytes.set) { | |
317 | status = LTTNG_CONDITION_STATUS_UNSET; | |
318 | goto end; | |
319 | } | |
320 | *consumed_threshold_bytes = consumed->consumed_threshold_bytes.value; | |
321 | end: | |
322 | return status; | |
323 | } | |
324 | ||
325 | enum lttng_condition_status | |
326 | lttng_condition_session_consumed_size_set_threshold( | |
327 | struct lttng_condition *condition, uint64_t consumed_threshold_bytes) | |
328 | { | |
329 | struct lttng_condition_session_consumed_size *consumed; | |
330 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
331 | ||
332 | if (!condition || !IS_CONSUMED_SIZE_CONDITION(condition)) { | |
333 | status = LTTNG_CONDITION_STATUS_INVALID; | |
334 | goto end; | |
335 | } | |
336 | ||
337 | consumed = container_of(condition, struct lttng_condition_session_consumed_size, | |
338 | parent); | |
339 | consumed->consumed_threshold_bytes.set = true; | |
340 | consumed->consumed_threshold_bytes.value = consumed_threshold_bytes; | |
341 | end: | |
342 | return status; | |
343 | } | |
344 | ||
345 | enum lttng_condition_status | |
346 | lttng_condition_session_consumed_size_get_session_name( | |
347 | const struct lttng_condition *condition, | |
348 | const char **session_name) | |
349 | { | |
350 | struct lttng_condition_session_consumed_size *consumed; | |
351 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
352 | ||
353 | if (!condition || !IS_CONSUMED_SIZE_CONDITION(condition) || !session_name) { | |
354 | status = LTTNG_CONDITION_STATUS_INVALID; | |
355 | goto end; | |
356 | } | |
357 | ||
358 | consumed = container_of(condition, struct lttng_condition_session_consumed_size, | |
359 | parent); | |
360 | if (!consumed->session_name) { | |
361 | status = LTTNG_CONDITION_STATUS_UNSET; | |
362 | goto end; | |
363 | } | |
364 | *session_name = consumed->session_name; | |
365 | end: | |
366 | return status; | |
367 | } | |
368 | ||
369 | enum lttng_condition_status | |
370 | lttng_condition_session_consumed_size_set_session_name( | |
371 | struct lttng_condition *condition, const char *session_name) | |
372 | { | |
373 | char *session_name_copy; | |
374 | struct lttng_condition_session_consumed_size *consumed; | |
375 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
376 | ||
377 | if (!condition || !IS_CONSUMED_SIZE_CONDITION(condition) || | |
378 | !session_name || strlen(session_name) == 0) { | |
379 | status = LTTNG_CONDITION_STATUS_INVALID; | |
380 | goto end; | |
381 | } | |
382 | ||
383 | consumed = container_of(condition, struct lttng_condition_session_consumed_size, | |
384 | parent); | |
385 | session_name_copy = strdup(session_name); | |
386 | if (!session_name_copy) { | |
387 | status = LTTNG_CONDITION_STATUS_ERROR; | |
388 | goto end; | |
389 | } | |
390 | ||
391 | if (consumed->session_name) { | |
392 | free(consumed->session_name); | |
393 | } | |
394 | consumed->session_name = session_name_copy; | |
395 | end: | |
396 | return status; | |
397 | } | |
398 | ||
399 | static | |
400 | ssize_t lttng_evaluation_session_consumed_size_serialize( | |
401 | struct lttng_evaluation *evaluation, char *buf) | |
402 | { | |
403 | ssize_t ret; | |
404 | struct lttng_evaluation_session_consumed_size *consumed; | |
405 | ||
406 | consumed = container_of(evaluation, struct lttng_evaluation_session_consumed_size, | |
407 | parent); | |
408 | if (buf) { | |
409 | struct lttng_evaluation_session_consumed_size_comm comm = { | |
410 | .session_consumed = consumed->session_consumed, | |
411 | }; | |
412 | ||
413 | memcpy(buf, &comm, sizeof(comm)); | |
414 | } | |
415 | ||
416 | ret = sizeof(struct lttng_evaluation_session_consumed_size_comm); | |
417 | return ret; | |
418 | } | |
419 | ||
420 | static | |
421 | void lttng_evaluation_session_consumed_size_destroy( | |
422 | struct lttng_evaluation *evaluation) | |
423 | { | |
424 | struct lttng_evaluation_session_consumed_size *consumed; | |
425 | ||
426 | consumed = container_of(evaluation, struct lttng_evaluation_session_consumed_size, | |
427 | parent); | |
428 | free(consumed); | |
429 | } | |
430 | ||
431 | LTTNG_HIDDEN | |
432 | struct lttng_evaluation *lttng_evaluation_session_consumed_size_create( | |
433 | enum lttng_condition_type type, uint64_t consumed) | |
434 | { | |
435 | struct lttng_evaluation_session_consumed_size *consumed_eval; | |
436 | ||
437 | consumed_eval = zmalloc(sizeof(struct lttng_evaluation_session_consumed_size)); | |
438 | if (!consumed_eval) { | |
439 | goto end; | |
440 | } | |
441 | ||
442 | consumed_eval->parent.type = type; | |
443 | consumed_eval->session_consumed = consumed; | |
444 | consumed_eval->parent.serialize = lttng_evaluation_session_consumed_size_serialize; | |
445 | consumed_eval->parent.destroy = lttng_evaluation_session_consumed_size_destroy; | |
446 | end: | |
447 | return &consumed_eval->parent; | |
448 | } | |
449 | ||
450 | enum lttng_evaluation_status | |
451 | lttng_evaluation_session_consumed_size_get_consumed_size( | |
452 | const struct lttng_evaluation *evaluation, | |
453 | uint64_t *session_consumed) | |
454 | { | |
455 | struct lttng_evaluation_session_consumed_size *consumed; | |
456 | enum lttng_evaluation_status status = LTTNG_EVALUATION_STATUS_OK; | |
457 | ||
458 | if (!evaluation || !IS_CONSUMED_SIZE_EVALUATION(evaluation) || | |
459 | !session_consumed) { | |
460 | status = LTTNG_EVALUATION_STATUS_INVALID; | |
461 | goto end; | |
462 | } | |
463 | ||
464 | consumed = container_of(evaluation, struct lttng_evaluation_session_consumed_size, | |
465 | parent); | |
466 | *session_consumed = consumed->session_consumed; | |
467 | end: | |
468 | return status; | |
469 | } |