1 /*
2 * collectd - src/utils_tail_match.c
3 * Copyright (C) 2007-2008 C-Ware, Inc.
4 * Copyright (C) 2008 Florian Forster
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
22 * DEALINGS IN THE SOFTWARE.
23 *
24 * Author:
25 * Luke Heberling <lukeh at c-ware.com>
26 * Florian Forster <octo at collectd.org>
27 *
28 * Description:
29 * Encapsulates useful code to plugins which must parse a log file.
30 */
32 #include "collectd.h"
34 #include "common.h"
35 #include "plugin.h"
36 #include "utils_match.h"
37 #include "utils_tail.h"
38 #include "utils_tail_match.h"
39 #include "utils_latency_config.h"
41 struct cu_tail_match_simple_s
42 {
43 char plugin[DATA_MAX_NAME_LEN];
44 char plugin_instance[DATA_MAX_NAME_LEN];
45 char type[DATA_MAX_NAME_LEN];
46 char type_instance[DATA_MAX_NAME_LEN];
47 cdtime_t interval;
48 latency_config_t latency_config;
49 };
50 typedef struct cu_tail_match_simple_s cu_tail_match_simple_t;
52 struct cu_tail_match_match_s
53 {
54 cu_match_t *match;
55 void *user_data;
56 int (*submit) (cu_match_t *match, void *user_data);
57 void (*free) (void *user_data);
58 };
59 typedef struct cu_tail_match_match_s cu_tail_match_match_t;
61 struct cu_tail_match_s
62 {
63 int flags;
64 cu_tail_t *tail;
66 cdtime_t interval;
67 cu_tail_match_match_t *matches;
68 size_t matches_num;
69 };
71 /*
72 * Private functions
73 */
74 static int simple_submit_match (cu_match_t *match, void *user_data)
75 {
76 cu_tail_match_simple_t *data = (cu_tail_match_simple_t *) user_data;
77 cu_match_value_t *match_value;
78 value_list_t vl = VALUE_LIST_INIT;
79 value_t values[1];
81 match_value = (cu_match_value_t *) match_get_user_data (match);
82 if (match_value == NULL)
83 return (-1);
85 if ((match_value->ds_type & UTILS_MATCH_DS_TYPE_GAUGE)
86 && (match_value->values_num == 0))
87 values[0].gauge = NAN;
88 else
89 values[0] = match_value->value;
91 vl.values = values;
92 vl.values_len = 1;
93 sstrncpy (vl.plugin, data->plugin, sizeof (vl.plugin));
94 sstrncpy (vl.plugin_instance, data->plugin_instance,
95 sizeof (vl.plugin_instance));
96 sstrncpy (vl.type, data->type, sizeof (vl.type));
97 sstrncpy (vl.type_instance, data->type_instance,
98 sizeof (vl.type_instance));
100 vl.interval = data->interval;
101 plugin_dispatch_values (&vl);
103 match_value_reset (match_value);
104 return (0);
105 } /* int simple_submit_match */
107 static int latency_submit_match(cu_match_t *match, void *user_data) {
108 cu_tail_match_simple_t *data = (cu_tail_match_simple_t *)user_data;
109 cu_match_value_t *match_value;
110 value_list_t vl = VALUE_LIST_INIT;
112 match_value = (cu_match_value_t *)match_get_user_data(match);
113 if (match_value == NULL)
114 return (-1);
116 sstrncpy(vl.host, hostname_g, sizeof(vl.host));
117 sstrncpy(vl.plugin, data->plugin, sizeof(vl.plugin));
118 sstrncpy(vl.plugin_instance, data->plugin_instance,
119 sizeof(vl.plugin_instance));
120 vl.interval = data->interval;
121 vl.time = cdtime();
123 /* Submit percentiles */
124 sstrncpy(vl.type, data->type, sizeof(vl.type));
125 for (size_t i = 0; i < data->latency_config.percentile_num; i++) {
126 if (strlen(data->type_instance) != 0)
127 ssnprintf(vl.type_instance, sizeof(vl.type_instance), "%s-%.0f",
128 data->type_instance, data->latency_config.percentile[i]);
129 else
130 ssnprintf(vl.type_instance, sizeof(vl.type_instance), "%.0f",
131 data->latency_config.percentile[i]);
133 vl.values = &(value_t){
134 .gauge =
135 (match_value->values_num != 0)
136 ? CDTIME_T_TO_DOUBLE(latency_counter_get_percentile(
137 match_value->latency, data->latency_config.percentile[i]))
138 : NAN,
139 };
140 vl.values_len = 1;
142 plugin_dispatch_values(&vl);
143 }
145 /* Submit buckets */
146 sstrncpy(vl.type, "bucket", sizeof(vl.type));
147 for (size_t i = 0; i < data->latency_config.buckets_num; i++) {
148 latency_bucket_t bucket = data->latency_config.buckets[i];
150 double lower_bound = CDTIME_T_TO_DOUBLE(bucket.lower_bound);
151 double upper_bound =
152 bucket.upper_bound ? CDTIME_T_TO_DOUBLE(bucket.upper_bound) : INFINITY;
154 if (strlen(data->type_instance) != 0)
155 ssnprintf(vl.type_instance, sizeof(vl.type_instance), "%s-%s-%g_%g",
156 data->type, data->type_instance, lower_bound, upper_bound);
157 else
158 ssnprintf(vl.type_instance, sizeof(vl.type_instance), "%s-%g_%g",
159 data->type, lower_bound, upper_bound);
161 vl.values = &(value_t){
162 .gauge = latency_counter_get_rate(match_value->latency,
163 bucket.lower_bound,
164 bucket.upper_bound, vl.time),
165 };
166 vl.values_len = 1;
168 plugin_dispatch_values(&vl);
169 }
171 match_value->value.gauge = NAN;
172 match_value->values_num = 0;
173 latency_counter_reset(match_value->latency);
175 return (0);
176 } /* int latency_submit_match */
178 static int tail_callback (void *data, char *buf,
179 int __attribute__((unused)) buflen)
180 {
181 cu_tail_match_t *obj = (cu_tail_match_t *) data;
183 for (size_t i = 0; i < obj->matches_num; i++)
184 match_apply (obj->matches[i].match, buf);
186 return (0);
187 } /* int tail_callback */
189 static void tail_match_simple_free (void *data)
190 {
191 cu_tail_match_simple_t *user_data = (cu_tail_match_simple_t *) data;
192 latency_config_free(user_data->latency_config);
193 sfree (user_data);
194 } /* void tail_match_simple_free */
196 /*
197 * Public functions
198 */
199 cu_tail_match_t *tail_match_create (const char *filename)
200 {
201 cu_tail_match_t *obj;
203 obj = calloc (1, sizeof (*obj));
204 if (obj == NULL)
205 return (NULL);
207 obj->tail = cu_tail_create (filename);
208 if (obj->tail == NULL)
209 {
210 sfree (obj);
211 return (NULL);
212 }
214 return (obj);
215 } /* cu_tail_match_t *tail_match_create */
217 void tail_match_destroy (cu_tail_match_t *obj)
218 {
219 if (obj == NULL)
220 return;
222 if (obj->tail != NULL)
223 {
224 cu_tail_destroy (obj->tail);
225 obj->tail = NULL;
226 }
228 for (size_t i = 0; i < obj->matches_num; i++)
229 {
230 cu_tail_match_match_t *match = obj->matches + i;
231 if (match->match != NULL)
232 {
233 match_destroy (match->match);
234 match->match = NULL;
235 }
237 if ((match->user_data != NULL)
238 && (match->free != NULL))
239 (*match->free) (match->user_data);
240 match->user_data = NULL;
241 }
243 sfree (obj->matches);
244 sfree (obj);
245 } /* void tail_match_destroy */
247 int tail_match_add_match (cu_tail_match_t *obj, cu_match_t *match,
248 int (*submit_match) (cu_match_t *match, void *user_data),
249 void *user_data,
250 void (*free_user_data) (void *user_data))
251 {
252 cu_tail_match_match_t *temp;
254 temp = realloc (obj->matches,
255 sizeof (cu_tail_match_match_t) * (obj->matches_num + 1));
256 if (temp == NULL)
257 return (-1);
259 obj->matches = temp;
260 obj->matches_num++;
262 DEBUG ("tail_match_add_match interval %lf", CDTIME_T_TO_DOUBLE(((cu_tail_match_simple_t *)user_data)->interval));
263 temp = obj->matches + (obj->matches_num - 1);
265 temp->match = match;
266 temp->user_data = user_data;
267 temp->submit = submit_match;
268 temp->free = free_user_data;
270 return (0);
271 } /* int tail_match_add_match */
273 int tail_match_add_match_simple (cu_tail_match_t *obj,
274 const char *regex, const char *excluderegex, int ds_type,
275 const char *plugin, const char *plugin_instance,
276 const char *type, const char *type_instance,
277 const latency_config_t latency_cfg,
278 const cdtime_t interval)
279 {
280 cu_match_t *match;
281 cu_tail_match_simple_t *user_data;
282 int status;
284 match = match_create_simple (regex, excluderegex, ds_type);
285 if (match == NULL)
286 return (-1);
288 user_data = calloc (1, sizeof (*user_data));
289 if (user_data == NULL)
290 {
291 match_destroy (match);
292 return (-1);
293 }
295 sstrncpy (user_data->plugin, plugin, sizeof (user_data->plugin));
296 if (plugin_instance != NULL)
297 sstrncpy (user_data->plugin_instance, plugin_instance,
298 sizeof (user_data->plugin_instance));
300 sstrncpy (user_data->type, type, sizeof (user_data->type));
301 if (type_instance != NULL)
302 sstrncpy (user_data->type_instance, type_instance,
303 sizeof (user_data->type_instance));
305 user_data->interval = interval;
307 if ((ds_type & UTILS_MATCH_DS_TYPE_GAUGE)
308 && (ds_type & UTILS_MATCH_CF_GAUGE_DIST))
309 {
310 status = latency_config_copy(&user_data->latency_config, latency_cfg);
311 if (status != 0)
312 {
313 ERROR ("tail_match_add_match_simple: latency_config_copy() failed.");
314 status = -1;
315 goto out;
316 }
318 status = tail_match_add_match (obj, match, latency_submit_match,
319 user_data, tail_match_simple_free);
320 } else {
321 status = tail_match_add_match (obj, match, simple_submit_match,
322 user_data, free);
323 }
325 out:
326 if (status != 0)
327 {
328 tail_match_simple_free(user_data);
329 match_destroy (match);
330 }
332 return (status);
333 } /* int tail_match_add_match_simple */
335 int tail_match_read (cu_tail_match_t *obj)
336 {
337 char buffer[4096];
338 int status;
340 status = cu_tail_read (obj->tail, buffer, sizeof (buffer), tail_callback,
341 (void *) obj);
342 if (status != 0)
343 {
344 ERROR ("tail_match: cu_tail_read failed.");
345 return (status);
346 }
348 for (size_t i = 0; i < obj->matches_num; i++)
349 {
350 cu_tail_match_match_t *lt_match = obj->matches + i;
352 if (lt_match->submit == NULL)
353 continue;
355 (*lt_match->submit) (lt_match->match, lt_match->user_data);
356 }
358 return (0);
359 } /* int tail_match_read */
361 /* vim: set sw=2 sts=2 ts=8 : */