Commit | Line | Data |
---|---|---|
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> | |
20 | #include <common/macros.h> | |
21 | #include <common/error.h> | |
22 | #include <assert.h> | |
23 | #include <math.h> | |
24 | #include <float.h> | |
25 | #include <time.h> | |
26 | ||
27 | #define IS_CONSUMED_SIZE_CONDITION(condition) ( \ | |
28 | lttng_condition_get_type(condition) == LTTNG_CONDITION_TYPE_SESSION_CONSUMED_SIZE \ | |
29 | ) | |
30 | ||
31 | #define IS_CONSUMED_SIZE_EVALUATION(evaluation) ( \ | |
32 | lttng_evaluation_get_type(evaluation) == LTTNG_CONDITION_TYPE_SESSION_CONSUMED_SIZE \ | |
33 | ) | |
34 | ||
35 | static | |
36 | void lttng_condition_session_consumed_size_destroy(struct lttng_condition *condition) | |
37 | { | |
38 | struct lttng_condition_session_consumed_size *consumed_size; | |
39 | ||
40 | consumed_size = container_of(condition, | |
41 | struct lttng_condition_session_consumed_size, parent); | |
42 | ||
43 | free(consumed_size->session_name); | |
44 | free(consumed_size); | |
45 | } | |
46 | ||
47 | static | |
48 | bool lttng_condition_session_consumed_size_validate( | |
49 | const struct lttng_condition *condition) | |
50 | { | |
51 | bool valid = false; | |
52 | struct lttng_condition_session_consumed_size *consumed; | |
53 | ||
54 | if (!condition) { | |
55 | goto end; | |
56 | } | |
57 | ||
58 | consumed = container_of(condition, struct lttng_condition_session_consumed_size, | |
59 | parent); | |
60 | if (!consumed->session_name) { | |
61 | ERR("Invalid buffer condition: a target session name must be set."); | |
62 | goto end; | |
63 | } | |
64 | if (!consumed->consumed_threshold_bytes.set) { | |
65 | ERR("Invalid session condition: a threshold must be set."); | |
66 | goto end; | |
67 | } | |
68 | ||
69 | valid = true; | |
70 | end: | |
71 | return valid; | |
72 | } | |
73 | ||
74 | static | |
75 | ssize_t lttng_condition_session_consumed_size_serialize( | |
76 | const struct lttng_condition *condition, char *buf) | |
77 | { | |
78 | struct lttng_condition_session_consumed_size *consumed; | |
79 | ssize_t ret, size; | |
80 | size_t session_name_len; | |
81 | ||
82 | if (!condition || !IS_CONSUMED_SIZE_CONDITION(condition)) { | |
83 | ret = -1; | |
84 | goto end; | |
85 | } | |
86 | ||
87 | DBG("Serializing session consumed condition"); | |
88 | consumed = container_of(condition, struct lttng_condition_session_consumed_size, | |
89 | parent); | |
90 | size = sizeof(struct lttng_condition_session_consumed_size_comm); | |
91 | session_name_len = strlen(consumed->session_name) + 1; | |
92 | if (session_name_len > LTTNG_NAME_MAX) { | |
93 | ret = -1; | |
94 | goto end; | |
95 | } | |
96 | size += session_name_len; | |
97 | if (buf) { | |
98 | struct lttng_condition_session_consumed_size_comm consumed_comm = { | |
99 | .consumed_threshold_bytes = consumed->consumed_threshold_bytes.value, | |
100 | .session_name_len = session_name_len, | |
101 | }; | |
102 | ||
103 | memcpy(buf, &consumed_comm, sizeof(consumed_comm)); | |
104 | buf += sizeof(consumed_comm); | |
105 | memcpy(buf, consumed->session_name, session_name_len); | |
106 | buf += session_name_len; | |
107 | } | |
108 | ret = size; | |
109 | end: | |
110 | return ret; | |
111 | } | |
112 | ||
113 | static | |
114 | bool lttng_condition_session_consumed_size_is_equal(const struct lttng_condition *_a, | |
115 | const struct lttng_condition *_b) | |
116 | { | |
117 | bool is_equal = false; | |
118 | struct lttng_condition_session_consumed_size *a, *b; | |
119 | ||
120 | a = container_of(_a, struct lttng_condition_session_consumed_size, parent); | |
121 | b = container_of(_b, struct lttng_condition_session_consumed_size, parent); | |
122 | ||
123 | if (a->consumed_threshold_bytes.set && b->consumed_threshold_bytes.set) { | |
124 | uint64_t a_value, b_value; | |
125 | ||
126 | a_value = a->consumed_threshold_bytes.value; | |
127 | b_value = b->consumed_threshold_bytes.value; | |
128 | if (a_value != b_value) { | |
129 | goto end; | |
130 | } | |
131 | } | |
132 | ||
133 | if ((a->session_name && !b->session_name) || | |
134 | (!a->session_name && b->session_name)) { | |
135 | goto end; | |
136 | } | |
137 | ||
138 | is_equal = true; | |
139 | end: | |
140 | return is_equal; | |
141 | } | |
142 | ||
143 | struct lttng_condition *lttng_condition_session_consumed_size_create(void) | |
144 | { | |
145 | struct lttng_condition_session_consumed_size *condition; | |
146 | ||
147 | condition = zmalloc(sizeof(struct lttng_condition_session_consumed_size)); | |
148 | if (!condition) { | |
149 | return NULL; | |
150 | } | |
151 | ||
152 | lttng_condition_init(&condition->parent, LTTNG_CONDITION_TYPE_SESSION_CONSUMED_SIZE); | |
153 | condition->parent.validate = lttng_condition_session_consumed_size_validate; | |
154 | condition->parent.serialize = lttng_condition_session_consumed_size_serialize; | |
155 | condition->parent.equal = lttng_condition_session_consumed_size_is_equal; | |
156 | condition->parent.destroy = lttng_condition_session_consumed_size_destroy; | |
157 | return &condition->parent; | |
158 | } | |
159 | ||
160 | static | |
161 | ssize_t init_condition_from_buffer(struct lttng_condition *condition, | |
162 | const struct lttng_buffer_view *src_view) | |
163 | { | |
164 | ssize_t ret, condition_size; | |
165 | enum lttng_condition_status status; | |
166 | const struct lttng_condition_session_consumed_size_comm *condition_comm; | |
167 | const char *session_name; | |
168 | struct lttng_buffer_view names_view; | |
169 | ||
170 | if (src_view->size < sizeof(*condition_comm)) { | |
171 | ERR("Failed to initialize from malformed condition buffer: buffer too short to contain header"); | |
172 | ret = -1; | |
173 | goto end; | |
174 | } | |
175 | ||
176 | condition_comm = (const struct lttng_condition_session_consumed_size_comm *) src_view->data; | |
177 | names_view = lttng_buffer_view_from_view(src_view, | |
178 | sizeof(*condition_comm), -1); | |
179 | ||
180 | if (condition_comm->session_name_len > LTTNG_NAME_MAX) { | |
181 | ERR("Failed to initialize from malformed condition buffer: name exceeds LTTNG_MAX_NAME"); | |
182 | ret = -1; | |
183 | goto end; | |
184 | } | |
185 | ||
186 | if (names_view.size < condition_comm->session_name_len) { | |
187 | ERR("Failed to initialize from malformed condition buffer: buffer too short to contain element names"); | |
188 | ret = -1; | |
189 | goto end; | |
190 | } | |
191 | ||
192 | status = lttng_condition_session_consumed_size_set_threshold(condition, | |
193 | condition_comm->consumed_threshold_bytes); | |
194 | if (status != LTTNG_CONDITION_STATUS_OK) { | |
195 | ERR("Failed to initialize session consumed condition threshold"); | |
196 | ret = -1; | |
197 | goto end; | |
198 | } | |
199 | ||
200 | session_name = names_view.data; | |
201 | if (*(session_name + condition_comm->session_name_len - 1) != '\0') { | |
202 | ERR("Malformed session name encountered in condition buffer"); | |
203 | ret = -1; | |
204 | goto end; | |
205 | } | |
206 | ||
207 | status = lttng_condition_session_consumed_size_set_session_name(condition, | |
208 | session_name); | |
209 | if (status != LTTNG_CONDITION_STATUS_OK) { | |
210 | ERR("Failed to set buffer consumed session name"); | |
211 | ret = -1; | |
212 | goto end; | |
213 | } | |
214 | ||
215 | if (!lttng_condition_validate(condition)) { | |
216 | ret = -1; | |
217 | goto end; | |
218 | } | |
219 | ||
220 | condition_size = sizeof(*condition_comm) + | |
221 | (ssize_t) condition_comm->session_name_len; | |
222 | ret = condition_size; | |
223 | end: | |
224 | return ret; | |
225 | } | |
226 | ||
227 | LTTNG_HIDDEN | |
228 | ssize_t lttng_condition_session_consumed_size_create_from_buffer( | |
229 | const struct lttng_buffer_view *view, | |
230 | struct lttng_condition **_condition) | |
231 | { | |
232 | ssize_t ret; | |
233 | struct lttng_condition *condition = | |
234 | lttng_condition_session_consumed_size_create(); | |
235 | ||
236 | if (!_condition || !condition) { | |
237 | ret = -1; | |
238 | goto error; | |
239 | } | |
240 | ||
241 | ret = init_condition_from_buffer(condition, view); | |
242 | if (ret < 0) { | |
243 | goto error; | |
244 | } | |
245 | ||
246 | *_condition = condition; | |
247 | return ret; | |
248 | error: | |
249 | lttng_condition_destroy(condition); | |
250 | return ret; | |
251 | } | |
252 | ||
253 | static | |
254 | struct lttng_evaluation *create_evaluation_from_buffer( | |
255 | enum lttng_condition_type type, | |
256 | const struct lttng_buffer_view *view) | |
257 | { | |
258 | const struct lttng_evaluation_session_consumed_size_comm *comm = | |
259 | (const struct lttng_evaluation_session_consumed_size_comm *) view->data; | |
260 | struct lttng_evaluation *evaluation = NULL; | |
261 | ||
262 | if (view->size < sizeof(*comm)) { | |
263 | goto end; | |
264 | } | |
265 | ||
266 | evaluation = lttng_evaluation_session_consumed_size_create(type, | |
267 | comm->session_consumed); | |
268 | end: | |
269 | return evaluation; | |
270 | } | |
271 | ||
272 | LTTNG_HIDDEN | |
273 | ssize_t lttng_evaluation_session_consumed_size_create_from_buffer( | |
274 | const struct lttng_buffer_view *view, | |
275 | struct lttng_evaluation **_evaluation) | |
276 | { | |
277 | ssize_t ret; | |
278 | struct lttng_evaluation *evaluation = NULL; | |
279 | ||
280 | if (!_evaluation) { | |
281 | ret = -1; | |
282 | goto error; | |
283 | } | |
284 | ||
285 | evaluation = create_evaluation_from_buffer( | |
286 | LTTNG_CONDITION_TYPE_SESSION_CONSUMED_SIZE, view); | |
287 | if (!evaluation) { | |
288 | ret = -1; | |
289 | goto error; | |
290 | } | |
291 | ||
292 | *_evaluation = evaluation; | |
293 | ret = sizeof(struct lttng_evaluation_session_consumed_size_comm); | |
294 | return ret; | |
295 | error: | |
296 | lttng_evaluation_destroy(evaluation); | |
297 | return ret; | |
298 | } | |
299 | ||
300 | enum lttng_condition_status | |
301 | lttng_condition_session_consumed_size_get_threshold( | |
302 | const struct lttng_condition *condition, | |
303 | uint64_t *consumed_threshold_bytes) | |
304 | { | |
305 | struct lttng_condition_session_consumed_size *consumed; | |
306 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
307 | ||
308 | if (!condition || !IS_CONSUMED_SIZE_CONDITION(condition) || !consumed_threshold_bytes) { | |
309 | status = LTTNG_CONDITION_STATUS_INVALID; | |
310 | goto end; | |
311 | } | |
312 | ||
313 | consumed = container_of(condition, struct lttng_condition_session_consumed_size, | |
314 | parent); | |
315 | if (!consumed->consumed_threshold_bytes.set) { | |
316 | status = LTTNG_CONDITION_STATUS_UNSET; | |
317 | goto end; | |
318 | } | |
319 | *consumed_threshold_bytes = consumed->consumed_threshold_bytes.value; | |
320 | end: | |
321 | return status; | |
322 | } | |
323 | ||
324 | enum lttng_condition_status | |
325 | lttng_condition_session_consumed_size_set_threshold( | |
326 | struct lttng_condition *condition, uint64_t consumed_threshold_bytes) | |
327 | { | |
328 | struct lttng_condition_session_consumed_size *consumed; | |
329 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
330 | ||
331 | if (!condition || !IS_CONSUMED_SIZE_CONDITION(condition)) { | |
332 | status = LTTNG_CONDITION_STATUS_INVALID; | |
333 | goto end; | |
334 | } | |
335 | ||
336 | consumed = container_of(condition, struct lttng_condition_session_consumed_size, | |
337 | parent); | |
338 | consumed->consumed_threshold_bytes.set = true; | |
339 | consumed->consumed_threshold_bytes.value = consumed_threshold_bytes; | |
340 | end: | |
341 | return status; | |
342 | } | |
343 | ||
344 | enum lttng_condition_status | |
345 | lttng_condition_session_consumed_size_get_session_name( | |
346 | const struct lttng_condition *condition, | |
347 | const char **session_name) | |
348 | { | |
349 | struct lttng_condition_session_consumed_size *consumed; | |
350 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
351 | ||
352 | if (!condition || !IS_CONSUMED_SIZE_CONDITION(condition) || !session_name) { | |
353 | status = LTTNG_CONDITION_STATUS_INVALID; | |
354 | goto end; | |
355 | } | |
356 | ||
357 | consumed = container_of(condition, struct lttng_condition_session_consumed_size, | |
358 | parent); | |
359 | if (!consumed->session_name) { | |
360 | status = LTTNG_CONDITION_STATUS_UNSET; | |
361 | goto end; | |
362 | } | |
363 | *session_name = consumed->session_name; | |
364 | end: | |
365 | return status; | |
366 | } | |
367 | ||
368 | enum lttng_condition_status | |
369 | lttng_condition_session_consumed_size_set_session_name( | |
370 | struct lttng_condition *condition, const char *session_name) | |
371 | { | |
372 | char *session_name_copy; | |
373 | struct lttng_condition_session_consumed_size *consumed; | |
374 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
375 | ||
376 | if (!condition || !IS_CONSUMED_SIZE_CONDITION(condition) || | |
377 | !session_name || strlen(session_name) == 0) { | |
378 | status = LTTNG_CONDITION_STATUS_INVALID; | |
379 | goto end; | |
380 | } | |
381 | ||
382 | consumed = container_of(condition, struct lttng_condition_session_consumed_size, | |
383 | parent); | |
384 | session_name_copy = strdup(session_name); | |
385 | if (!session_name_copy) { | |
386 | status = LTTNG_CONDITION_STATUS_ERROR; | |
387 | goto end; | |
388 | } | |
389 | ||
390 | if (consumed->session_name) { | |
391 | free(consumed->session_name); | |
392 | } | |
393 | consumed->session_name = session_name_copy; | |
394 | end: | |
395 | return status; | |
396 | } | |
397 | ||
398 | static | |
399 | ssize_t lttng_evaluation_session_consumed_size_serialize( | |
400 | struct lttng_evaluation *evaluation, char *buf) | |
401 | { | |
402 | ssize_t ret; | |
403 | struct lttng_evaluation_session_consumed_size *consumed; | |
404 | ||
405 | consumed = container_of(evaluation, struct lttng_evaluation_session_consumed_size, | |
406 | parent); | |
407 | if (buf) { | |
408 | struct lttng_evaluation_session_consumed_size_comm comm = { | |
409 | .session_consumed = consumed->session_consumed, | |
410 | }; | |
411 | ||
412 | memcpy(buf, &comm, sizeof(comm)); | |
413 | } | |
414 | ||
415 | ret = sizeof(struct lttng_evaluation_session_consumed_size_comm); | |
416 | return ret; | |
417 | } | |
418 | ||
419 | static | |
420 | void lttng_evaluation_session_consumed_size_destroy( | |
421 | struct lttng_evaluation *evaluation) | |
422 | { | |
423 | struct lttng_evaluation_session_consumed_size *consumed; | |
424 | ||
425 | consumed = container_of(evaluation, struct lttng_evaluation_session_consumed_size, | |
426 | parent); | |
427 | free(consumed); | |
428 | } | |
429 | ||
430 | LTTNG_HIDDEN | |
431 | struct lttng_evaluation *lttng_evaluation_session_consumed_size_create( | |
432 | enum lttng_condition_type type, uint64_t consumed) | |
433 | { | |
434 | struct lttng_evaluation_session_consumed_size *consumed_eval; | |
435 | ||
436 | consumed_eval = zmalloc(sizeof(struct lttng_evaluation_session_consumed_size)); | |
437 | if (!consumed_eval) { | |
438 | goto end; | |
439 | } | |
440 | ||
441 | consumed_eval->parent.type = type; | |
442 | consumed_eval->session_consumed = consumed; | |
443 | consumed_eval->parent.serialize = lttng_evaluation_session_consumed_size_serialize; | |
444 | consumed_eval->parent.destroy = lttng_evaluation_session_consumed_size_destroy; | |
445 | end: | |
446 | return &consumed_eval->parent; | |
447 | } | |
448 | ||
449 | enum lttng_evaluation_status | |
450 | lttng_evaluation_session_consumed_size_get_consumed_size( | |
451 | const struct lttng_evaluation *evaluation, | |
452 | uint64_t *session_consumed) | |
453 | { | |
454 | struct lttng_evaluation_session_consumed_size *consumed; | |
455 | enum lttng_evaluation_status status = LTTNG_EVALUATION_STATUS_OK; | |
456 | ||
457 | if (!evaluation || !IS_CONSUMED_SIZE_EVALUATION(evaluation) || | |
458 | !session_consumed) { | |
459 | status = LTTNG_EVALUATION_STATUS_INVALID; | |
460 | goto end; | |
461 | } | |
462 | ||
463 | consumed = container_of(evaluation, struct lttng_evaluation_session_consumed_size, | |
464 | parent); | |
465 | *session_consumed = consumed->session_consumed; | |
466 | end: | |
467 | return status; | |
468 | } |