Cleanup: enforce const-correctness in notification thread
[lttng-tools.git] / src / common / session-consumed-size.c
CommitLineData
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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>
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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
36static
37void 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
48static
49bool 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) {
9ef5b6be 62 ERR("Invalid session consumed size condition: a target session name must be set.");
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63 goto end;
64 }
65 if (!consumed->consumed_threshold_bytes.set) {
9ef5b6be 66 ERR("Invalid session consumed size condition: a threshold must be set.");
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67 goto end;
68 }
69
70 valid = true;
71end:
72 return valid;
73}
74
75static
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76int 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;
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82 struct lttng_condition_session_consumed_size *consumed;
83 struct lttng_condition_session_consumed_size_comm consumed_comm;
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84
85 if (!condition || !IS_CONSUMED_SIZE_CONDITION(condition)) {
86 ret = -1;
87 goto end;
88 }
89
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90 DBG("Serializing session consumed size condition");
91 consumed = container_of(condition,
92 struct lttng_condition_session_consumed_size,
e8360425 93 parent);
3647288f 94
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95 session_name_len = strlen(consumed->session_name) + 1;
96 if (session_name_len > LTTNG_NAME_MAX) {
97 ret = -1;
98 goto end;
99 }
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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 }
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115end:
116 return ret;
117}
118
119static
120bool 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
821d5e92
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139 assert(a->session_name);
140 assert(b->session_name);
141 if (strcmp(a->session_name, b->session_name)) {
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142 goto end;
143 }
144
145 is_equal = true;
146end:
147 return is_equal;
148}
149
150struct lttng_condition *lttng_condition_session_consumed_size_create(void)
151{
152 struct lttng_condition_session_consumed_size *condition;
153
154 condition = zmalloc(sizeof(struct lttng_condition_session_consumed_size));
155 if (!condition) {
156 return NULL;
157 }
158
159 lttng_condition_init(&condition->parent, LTTNG_CONDITION_TYPE_SESSION_CONSUMED_SIZE);
160 condition->parent.validate = lttng_condition_session_consumed_size_validate;
161 condition->parent.serialize = lttng_condition_session_consumed_size_serialize;
162 condition->parent.equal = lttng_condition_session_consumed_size_is_equal;
163 condition->parent.destroy = lttng_condition_session_consumed_size_destroy;
164 return &condition->parent;
165}
166
167static
168ssize_t init_condition_from_buffer(struct lttng_condition *condition,
169 const struct lttng_buffer_view *src_view)
170{
171 ssize_t ret, condition_size;
172 enum lttng_condition_status status;
173 const struct lttng_condition_session_consumed_size_comm *condition_comm;
174 const char *session_name;
175 struct lttng_buffer_view names_view;
176
177 if (src_view->size < sizeof(*condition_comm)) {
178 ERR("Failed to initialize from malformed condition buffer: buffer too short to contain header");
179 ret = -1;
180 goto end;
181 }
182
183 condition_comm = (const struct lttng_condition_session_consumed_size_comm *) src_view->data;
184 names_view = lttng_buffer_view_from_view(src_view,
185 sizeof(*condition_comm), -1);
186
187 if (condition_comm->session_name_len > LTTNG_NAME_MAX) {
188 ERR("Failed to initialize from malformed condition buffer: name exceeds LTTNG_MAX_NAME");
189 ret = -1;
190 goto end;
191 }
192
193 if (names_view.size < condition_comm->session_name_len) {
194 ERR("Failed to initialize from malformed condition buffer: buffer too short to contain element names");
195 ret = -1;
196 goto end;
197 }
198
199 status = lttng_condition_session_consumed_size_set_threshold(condition,
200 condition_comm->consumed_threshold_bytes);
201 if (status != LTTNG_CONDITION_STATUS_OK) {
9ef5b6be 202 ERR("Failed to initialize session consumed size condition threshold");
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203 ret = -1;
204 goto end;
205 }
206
207 session_name = names_view.data;
208 if (*(session_name + condition_comm->session_name_len - 1) != '\0') {
209 ERR("Malformed session name encountered in condition buffer");
210 ret = -1;
211 goto end;
212 }
213
214 status = lttng_condition_session_consumed_size_set_session_name(condition,
215 session_name);
216 if (status != LTTNG_CONDITION_STATUS_OK) {
9ef5b6be 217 ERR("Failed to set session consumed size condition's session name");
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218 ret = -1;
219 goto end;
220 }
221
222 if (!lttng_condition_validate(condition)) {
223 ret = -1;
224 goto end;
225 }
226
227 condition_size = sizeof(*condition_comm) +
228 (ssize_t) condition_comm->session_name_len;
229 ret = condition_size;
230end:
231 return ret;
232}
233
234LTTNG_HIDDEN
235ssize_t lttng_condition_session_consumed_size_create_from_buffer(
236 const struct lttng_buffer_view *view,
237 struct lttng_condition **_condition)
238{
239 ssize_t ret;
240 struct lttng_condition *condition =
241 lttng_condition_session_consumed_size_create();
242
243 if (!_condition || !condition) {
244 ret = -1;
245 goto error;
246 }
247
248 ret = init_condition_from_buffer(condition, view);
249 if (ret < 0) {
250 goto error;
251 }
252
253 *_condition = condition;
254 return ret;
255error:
256 lttng_condition_destroy(condition);
257 return ret;
258}
259
260static
261struct lttng_evaluation *create_evaluation_from_buffer(
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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
5f2c1c0f 272 evaluation = lttng_evaluation_session_consumed_size_create(
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273 comm->session_consumed);
274end:
275 return evaluation;
276}
277
278LTTNG_HIDDEN
279ssize_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
5f2c1c0f 291 evaluation = create_evaluation_from_buffer(view);
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292 if (!evaluation) {
293 ret = -1;
294 goto error;
295 }
296
297 *_evaluation = evaluation;
298 ret = sizeof(struct lttng_evaluation_session_consumed_size_comm);
299 return ret;
300error:
301 lttng_evaluation_destroy(evaluation);
302 return ret;
303}
304
305enum lttng_condition_status
306lttng_condition_session_consumed_size_get_threshold(
307 const struct lttng_condition *condition,
308 uint64_t *consumed_threshold_bytes)
309{
310 struct lttng_condition_session_consumed_size *consumed;
311 enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK;
312
313 if (!condition || !IS_CONSUMED_SIZE_CONDITION(condition) || !consumed_threshold_bytes) {
314 status = LTTNG_CONDITION_STATUS_INVALID;
315 goto end;
316 }
317
318 consumed = container_of(condition, struct lttng_condition_session_consumed_size,
319 parent);
320 if (!consumed->consumed_threshold_bytes.set) {
321 status = LTTNG_CONDITION_STATUS_UNSET;
322 goto end;
323 }
324 *consumed_threshold_bytes = consumed->consumed_threshold_bytes.value;
325end:
326 return status;
327}
328
329enum lttng_condition_status
330lttng_condition_session_consumed_size_set_threshold(
331 struct lttng_condition *condition, uint64_t consumed_threshold_bytes)
332{
333 struct lttng_condition_session_consumed_size *consumed;
334 enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK;
335
336 if (!condition || !IS_CONSUMED_SIZE_CONDITION(condition)) {
337 status = LTTNG_CONDITION_STATUS_INVALID;
338 goto end;
339 }
340
341 consumed = container_of(condition, struct lttng_condition_session_consumed_size,
342 parent);
343 consumed->consumed_threshold_bytes.set = true;
344 consumed->consumed_threshold_bytes.value = consumed_threshold_bytes;
345end:
346 return status;
347}
348
349enum lttng_condition_status
350lttng_condition_session_consumed_size_get_session_name(
351 const struct lttng_condition *condition,
352 const char **session_name)
353{
354 struct lttng_condition_session_consumed_size *consumed;
355 enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK;
356
357 if (!condition || !IS_CONSUMED_SIZE_CONDITION(condition) || !session_name) {
358 status = LTTNG_CONDITION_STATUS_INVALID;
359 goto end;
360 }
361
362 consumed = container_of(condition, struct lttng_condition_session_consumed_size,
363 parent);
364 if (!consumed->session_name) {
365 status = LTTNG_CONDITION_STATUS_UNSET;
366 goto end;
367 }
368 *session_name = consumed->session_name;
369end:
370 return status;
371}
372
373enum lttng_condition_status
374lttng_condition_session_consumed_size_set_session_name(
375 struct lttng_condition *condition, const char *session_name)
376{
377 char *session_name_copy;
378 struct lttng_condition_session_consumed_size *consumed;
379 enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK;
380
381 if (!condition || !IS_CONSUMED_SIZE_CONDITION(condition) ||
382 !session_name || strlen(session_name) == 0) {
383 status = LTTNG_CONDITION_STATUS_INVALID;
384 goto end;
385 }
386
387 consumed = container_of(condition, struct lttng_condition_session_consumed_size,
388 parent);
389 session_name_copy = strdup(session_name);
390 if (!session_name_copy) {
391 status = LTTNG_CONDITION_STATUS_ERROR;
392 goto end;
393 }
394
395 if (consumed->session_name) {
396 free(consumed->session_name);
397 }
398 consumed->session_name = session_name_copy;
399end:
400 return status;
401}
402
403static
3647288f 404int lttng_evaluation_session_consumed_size_serialize(
9b63a4aa 405 const struct lttng_evaluation *evaluation,
3647288f 406 struct lttng_dynamic_buffer *buf)
e8360425 407{
e8360425 408 struct lttng_evaluation_session_consumed_size *consumed;
3647288f 409 struct lttng_evaluation_session_consumed_size_comm comm;
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410
411 consumed = container_of(evaluation, struct lttng_evaluation_session_consumed_size,
412 parent);
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413 comm.session_consumed = consumed->session_consumed;
414 return lttng_dynamic_buffer_append(buf, &comm, sizeof(comm));
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415}
416
417static
418void lttng_evaluation_session_consumed_size_destroy(
419 struct lttng_evaluation *evaluation)
420{
421 struct lttng_evaluation_session_consumed_size *consumed;
422
423 consumed = container_of(evaluation, struct lttng_evaluation_session_consumed_size,
424 parent);
425 free(consumed);
426}
427
428LTTNG_HIDDEN
429struct lttng_evaluation *lttng_evaluation_session_consumed_size_create(
5f2c1c0f 430 uint64_t consumed)
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431{
432 struct lttng_evaluation_session_consumed_size *consumed_eval;
433
434 consumed_eval = zmalloc(sizeof(struct lttng_evaluation_session_consumed_size));
435 if (!consumed_eval) {
436 goto end;
437 }
438
5f2c1c0f 439 consumed_eval->parent.type = LTTNG_CONDITION_TYPE_SESSION_CONSUMED_SIZE;
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440 consumed_eval->session_consumed = consumed;
441 consumed_eval->parent.serialize = lttng_evaluation_session_consumed_size_serialize;
442 consumed_eval->parent.destroy = lttng_evaluation_session_consumed_size_destroy;
443end:
444 return &consumed_eval->parent;
445}
446
447enum lttng_evaluation_status
448lttng_evaluation_session_consumed_size_get_consumed_size(
449 const struct lttng_evaluation *evaluation,
450 uint64_t *session_consumed)
451{
452 struct lttng_evaluation_session_consumed_size *consumed;
453 enum lttng_evaluation_status status = LTTNG_EVALUATION_STATUS_OK;
454
455 if (!evaluation || !IS_CONSUMED_SIZE_EVALUATION(evaluation) ||
456 !session_consumed) {
457 status = LTTNG_EVALUATION_STATUS_INVALID;
458 goto end;
459 }
460
461 consumed = container_of(evaluation, struct lttng_evaluation_session_consumed_size,
462 parent);
463 *session_consumed = consumed->session_consumed;
464end:
465 return status;
466}
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