1 /**
2 * collectd - src/utils_rrdcreate.c
3 * Copyright (C) 2006-2008 Florian octo Forster
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the
7 * Free Software Foundation; only version 2 of the License is applicable.
8 *
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
17 *
18 * Authors:
19 * Florian octo Forster <octo at verplant.org>
20 **/
22 #include "collectd.h"
23 #include "common.h"
24 #include "utils_rrdcreate.h"
26 #include <pthread.h>
27 #include <rrd.h>
29 /*
30 * Private variables
31 */
32 static int rra_timespans[] =
33 {
34 3600,
35 86400,
36 604800,
37 2678400,
38 31622400
39 };
40 static int rra_timespans_num = STATIC_ARRAY_SIZE (rra_timespans);
42 static char *rra_types[] =
43 {
44 "AVERAGE",
45 "MIN",
46 "MAX"
47 };
48 static int rra_types_num = STATIC_ARRAY_SIZE (rra_types);
50 #if !defined(HAVE_THREADSAFE_LIBRRD) || !HAVE_THREADSAFE_LIBRRD
51 static pthread_mutex_t librrd_lock = PTHREAD_MUTEX_INITIALIZER;
52 #endif
54 /*
55 * Private functions
56 */
57 static void rra_free (int rra_num, char **rra_def) /* {{{ */
58 {
59 int i;
61 for (i = 0; i < rra_num; i++)
62 {
63 sfree (rra_def[i]);
64 }
65 sfree (rra_def);
66 } /* }}} void rra_free */
68 /* * * * * * * * * *
69 * WARNING: Magic *
70 * * * * * * * * * */
71 static int rra_get (char ***ret, const value_list_t *vl, /* {{{ */
72 const rrdcreate_config_t *cfg)
73 {
74 char **rra_def;
75 int rra_num;
77 int *rts;
78 int rts_num;
80 int rra_max;
82 int span;
84 int cdp_num;
85 int cdp_len;
86 int i, j;
88 char buffer[128];
90 /* The stepsize we use here: If it is user-set, use it. If not, use the
91 * interval of the value-list. */
92 int ss;
94 if (cfg->rrarows <= 0)
95 {
96 *ret = NULL;
97 return (-1);
98 }
100 if ((cfg->xff < 0) || (cfg->xff >= 1.0))
101 {
102 *ret = NULL;
103 return (-1);
104 }
106 if (cfg->stepsize > 0)
107 ss = cfg->stepsize;
108 else
109 ss = (int) CDTIME_T_TO_TIME_T (vl->interval);
110 if (ss <= 0)
111 {
112 *ret = NULL;
113 return (-1);
114 }
116 /* Use the configured timespans or fall back to the built-in defaults */
117 if (cfg->timespans_num != 0)
118 {
119 rts = cfg->timespans;
120 rts_num = cfg->timespans_num;
121 }
122 else
123 {
124 rts = rra_timespans;
125 rts_num = rra_timespans_num;
126 }
128 rra_max = rts_num * rra_types_num;
130 if ((rra_def = (char **) malloc ((rra_max + 1) * sizeof (char *))) == NULL)
131 return (-1);
132 memset (rra_def, '\0', (rra_max + 1) * sizeof (char *));
133 rra_num = 0;
135 cdp_len = 0;
136 for (i = 0; i < rts_num; i++)
137 {
138 span = rts[i];
140 if ((span / ss) < cfg->rrarows)
141 span = ss * cfg->rrarows;
143 if (cdp_len == 0)
144 cdp_len = 1;
145 else
146 cdp_len = (int) floor (((double) span)
147 / ((double) (cfg->rrarows * ss)));
149 cdp_num = (int) ceil (((double) span)
150 / ((double) (cdp_len * ss)));
152 for (j = 0; j < rra_types_num; j++)
153 {
154 int status;
156 if (rra_num >= rra_max)
157 break;
159 status = ssnprintf (buffer, sizeof (buffer), "RRA:%s:%.10f:%u:%u",
160 rra_types[j], cfg->xff, cdp_len, cdp_num);
162 if ((status < 0) || ((size_t) status >= sizeof (buffer)))
163 {
164 ERROR ("rra_get: Buffer would have been truncated.");
165 continue;
166 }
168 rra_def[rra_num++] = sstrdup (buffer);
169 }
170 }
172 *ret = rra_def;
173 return (rra_num);
174 } /* }}} int rra_get */
176 static void ds_free (int ds_num, char **ds_def) /* {{{ */
177 {
178 int i;
180 for (i = 0; i < ds_num; i++)
181 if (ds_def[i] != NULL)
182 free (ds_def[i]);
183 free (ds_def);
184 } /* }}} void ds_free */
186 static int ds_get (char ***ret, /* {{{ */
187 const data_set_t *ds, const value_list_t *vl,
188 const rrdcreate_config_t *cfg)
189 {
190 char **ds_def;
191 int ds_num;
193 char min[32];
194 char max[32];
195 char buffer[128];
197 ds_def = (char **) malloc (ds->ds_num * sizeof (char *));
198 if (ds_def == NULL)
199 {
200 char errbuf[1024];
201 ERROR ("rrdtool plugin: malloc failed: %s",
202 sstrerror (errno, errbuf, sizeof (errbuf)));
203 return (-1);
204 }
205 memset (ds_def, '\0', ds->ds_num * sizeof (char *));
207 for (ds_num = 0; ds_num < ds->ds_num; ds_num++)
208 {
209 data_source_t *d = ds->ds + ds_num;
210 char *type;
211 int status;
213 ds_def[ds_num] = NULL;
215 if (d->type == DS_TYPE_COUNTER)
216 type = "COUNTER";
217 else if (d->type == DS_TYPE_GAUGE)
218 type = "GAUGE";
219 else if (d->type == DS_TYPE_DERIVE)
220 type = "DERIVE";
221 else if (d->type == DS_TYPE_ABSOLUTE)
222 type = "ABSOLUTE";
223 else
224 {
225 ERROR ("rrdtool plugin: Unknown DS type: %i",
226 d->type);
227 break;
228 }
230 if (isnan (d->min))
231 {
232 sstrncpy (min, "U", sizeof (min));
233 }
234 else
235 ssnprintf (min, sizeof (min), "%f", d->min);
237 if (isnan (d->max))
238 {
239 sstrncpy (max, "U", sizeof (max));
240 }
241 else
242 ssnprintf (max, sizeof (max), "%f", d->max);
244 status = ssnprintf (buffer, sizeof (buffer),
245 "DS:%s:%s:%i:%s:%s",
246 d->name, type,
247 (cfg->heartbeat > 0)
248 ? cfg->heartbeat
249 : (int) CDTIME_T_TO_TIME_T (2 * vl->interval),
250 min, max);
251 if ((status < 1) || ((size_t) status >= sizeof (buffer)))
252 break;
254 ds_def[ds_num] = sstrdup (buffer);
255 } /* for ds_num = 0 .. ds->ds_num */
257 if (ds_num != ds->ds_num)
258 {
259 ds_free (ds_num, ds_def);
260 return (-1);
261 }
263 *ret = ds_def;
264 return (ds_num);
265 } /* }}} int ds_get */
267 #if HAVE_THREADSAFE_LIBRRD
268 static int srrd_create (const char *filename, /* {{{ */
269 unsigned long pdp_step, time_t last_up,
270 int argc, const char **argv)
271 {
272 int status;
273 char *filename_copy;
275 if ((filename == NULL) || (argv == NULL))
276 return (-EINVAL);
278 /* Some versions of librrd don't have the `const' qualifier for the first
279 * argument, so we have to copy the pointer here to avoid warnings. It sucks,
280 * but what else can we do? :( -octo */
281 filename_copy = strdup (filename);
282 if (filename_copy == NULL)
283 {
284 ERROR ("srrd_create: strdup failed.");
285 return (-ENOMEM);
286 }
288 optind = 0; /* bug in librrd? */
289 rrd_clear_error ();
291 status = rrd_create_r (filename_copy, pdp_step, last_up,
292 argc, (void *) argv);
294 if (status != 0)
295 {
296 WARNING ("rrdtool plugin: rrd_create_r (%s) failed: %s",
297 filename, rrd_get_error ());
298 }
300 sfree (filename_copy);
302 return (status);
303 } /* }}} int srrd_create */
304 /* #endif HAVE_THREADSAFE_LIBRRD */
306 #else /* !HAVE_THREADSAFE_LIBRRD */
307 static int srrd_create (const char *filename, /* {{{ */
308 unsigned long pdp_step, time_t last_up,
309 int argc, const char **argv)
310 {
311 int status;
313 int new_argc;
314 char **new_argv;
316 char pdp_step_str[16];
317 char last_up_str[16];
319 new_argc = 6 + argc;
320 new_argv = (char **) malloc ((new_argc + 1) * sizeof (char *));
321 if (new_argv == NULL)
322 {
323 ERROR ("rrdtool plugin: malloc failed.");
324 return (-1);
325 }
327 if (last_up == 0)
328 last_up = time (NULL) - 10;
330 ssnprintf (pdp_step_str, sizeof (pdp_step_str), "%lu", pdp_step);
331 ssnprintf (last_up_str, sizeof (last_up_str), "%lu", (unsigned long) last_up);
333 new_argv[0] = "create";
334 new_argv[1] = (void *) filename;
335 new_argv[2] = "-s";
336 new_argv[3] = pdp_step_str;
337 new_argv[4] = "-b";
338 new_argv[5] = last_up_str;
340 memcpy (new_argv + 6, argv, argc * sizeof (char *));
341 new_argv[new_argc] = NULL;
343 pthread_mutex_lock (&librrd_lock);
344 optind = 0; /* bug in librrd? */
345 rrd_clear_error ();
347 status = rrd_create (new_argc, new_argv);
348 pthread_mutex_unlock (&librrd_lock);
350 if (status != 0)
351 {
352 WARNING ("rrdtool plugin: rrd_create (%s) failed: %s",
353 filename, rrd_get_error ());
354 }
356 sfree (new_argv);
358 return (status);
359 } /* }}} int srrd_create */
360 #endif /* !HAVE_THREADSAFE_LIBRRD */
362 /*
363 * Public functions
364 */
365 int cu_rrd_create_file (const char *filename, /* {{{ */
366 const data_set_t *ds, const value_list_t *vl,
367 const rrdcreate_config_t *cfg)
368 {
369 char **argv;
370 int argc;
371 char **rra_def;
372 int rra_num;
373 char **ds_def;
374 int ds_num;
375 int status = 0;
376 time_t last_up;
377 unsigned long stepsize;
379 if (check_create_dir (filename))
380 return (-1);
382 if ((rra_num = rra_get (&rra_def, vl, cfg)) < 1)
383 {
384 ERROR ("cu_rrd_create_file failed: Could not calculate RRAs");
385 return (-1);
386 }
388 if ((ds_num = ds_get (&ds_def, ds, vl, cfg)) < 1)
389 {
390 ERROR ("cu_rrd_create_file failed: Could not calculate DSes");
391 return (-1);
392 }
394 argc = ds_num + rra_num;
396 if ((argv = (char **) malloc (sizeof (char *) * (argc + 1))) == NULL)
397 {
398 char errbuf[1024];
399 ERROR ("cu_rrd_create_file failed: %s",
400 sstrerror (errno, errbuf, sizeof (errbuf)));
401 return (-1);
402 }
404 memcpy (argv, ds_def, ds_num * sizeof (char *));
405 memcpy (argv + ds_num, rra_def, rra_num * sizeof (char *));
406 argv[ds_num + rra_num] = NULL;
408 last_up = CDTIME_T_TO_TIME_T (vl->time);
409 if (last_up <= 10)
410 last_up = time (NULL);
411 last_up -= 10;
413 if (cfg->stepsize > 0)
414 stepsize = cfg->stepsize;
415 else
416 stepsize = (unsigned long) CDTIME_T_TO_TIME_T (vl->interval);
418 status = srrd_create (filename, stepsize, last_up,
419 argc, (const char **) argv);
421 free (argv);
422 ds_free (ds_num, ds_def);
423 rra_free (rra_num, rra_def);
425 if (status != 0)
426 {
427 WARNING ("cu_rrd_create_file: srrd_create (%s) returned status %i.",
428 filename, status);
429 }
430 else
431 {
432 DEBUG ("cu_rrd_create_file: Successfully created RRD file \"%s\".",
433 filename);
434 }
436 return (status);
437 } /* }}} int cu_rrd_create_file */
439 /* vim: set sw=2 sts=2 et fdm=marker : */