1 #include <stdlib.h>
2 #include <string.h>
3 #include <errno.h>
5 #include "graph_instance.h"
6 #include "graph_ident.h"
7 #include "graph_list.h"
8 #include "common.h"
9 #include "utils_params.h"
11 #include <fcgiapp.h>
12 #include <fcgi_stdio.h>
14 struct graph_instance_s /* {{{ */
15 {
16 graph_ident_t *select;
18 graph_ident_t **files;
19 size_t files_num;
21 graph_instance_t *next;
22 }; /* }}} struct graph_instance_s */
24 struct def_callback_data_s
25 {
26 graph_instance_t *inst;
27 str_array_t *args;
28 };
29 typedef struct def_callback_data_s def_callback_data_t;
31 /*
32 * Private functions
33 */
34 /* Create one DEF for each data source in the file. Called by
35 * "inst_get_default_defs" for each file. */
36 static graph_def_t *ident_get_default_defs (graph_config_t *cfg, /* {{{ */
37 graph_ident_t *ident, graph_def_t *def_head)
38 {
39 graph_def_t *defs = NULL;
40 char *file;
41 char **dses = NULL;
42 size_t dses_num = 0;
43 int status;
44 size_t i;
46 if ((cfg == NULL) || (ident == NULL))
47 return (def_head);
49 file = ident_to_file (ident);
50 if (file == NULL)
51 {
52 fprintf (stderr, "ident_get_default_defs: ident_to_file failed\n");
53 return (def_head);
54 }
56 status = ds_list_from_rrd_file (file, &dses_num, &dses);
57 if (status != 0)
58 {
59 free (file);
60 return (def_head);
61 }
63 for (i = 0; i < dses_num; i++)
64 {
65 graph_def_t *def;
67 def = def_search (def_head, ident, dses[i]);
68 if (def != NULL)
69 continue;
71 def = def_create (cfg, ident, dses[i]);
72 if (def == NULL)
73 continue;
75 if (defs == NULL)
76 defs = def;
77 else
78 def_append (defs, def);
80 free (dses[i]);
81 }
83 free (dses);
84 free (file);
86 return (defs);
87 } /* }}} int ident_get_default_defs */
89 /* Create one or more DEFs for each file in the graph instance. The number
90 * depends on the number of data sources in each of the files. Called from
91 * "inst_get_rrdargs" if no DEFs are available from the configuration.
92 * */
93 static graph_def_t *inst_get_default_defs (graph_config_t *cfg, /* {{{ */
94 graph_instance_t *inst)
95 {
96 graph_def_t *defs = NULL;
97 size_t i;
99 if ((cfg == NULL) || (inst == NULL))
100 return (NULL);
102 for (i = 0; i < inst->files_num; i++)
103 {
104 graph_def_t *def;
106 def = ident_get_default_defs (cfg, inst->files[i], defs);
107 if (def == NULL)
108 continue;
110 if (defs == NULL)
111 defs = def;
112 else
113 def_append (defs, def);
114 }
116 return (defs);
117 } /* }}} graph_def_t *inst_get_default_defs */
119 /* Called with each DEF in turn. Calls "def_get_rrdargs" with every appropriate
120 * file / DEF pair. */
121 static int gl_instance_get_rrdargs_cb (graph_def_t *def, void *user_data) /* {{{ */
122 {
123 def_callback_data_t *data = user_data;
124 graph_instance_t *inst = data->inst;
125 str_array_t *args = data->args;
127 size_t i;
129 for (i = 0; i < inst->files_num; i++)
130 {
131 if (!def_matches (def, inst->files[i]))
132 continue;
134 def_get_rrdargs (def, inst->files[i], args);
135 }
137 return (0);
138 } /* }}} int gl_instance_get_rrdargs_cb */
140 static const char *get_part_from_param (const char *prim_key, /* {{{ */
141 const char *sec_key)
142 {
143 const char *val;
145 val = param (prim_key);
146 if (val != NULL)
147 return (val);
149 return (param (sec_key));
150 } /* }}} const char *get_part_from_param */
152 /*
153 * Public functions
154 */
155 graph_instance_t *inst_create (graph_config_t *cfg, /* {{{ */
156 const graph_ident_t *ident)
157 {
158 graph_instance_t *i;
159 graph_ident_t *selector;
161 if ((cfg == NULL) || (ident == NULL))
162 return (NULL);
164 i = malloc (sizeof (*i));
165 if (i == NULL)
166 return (NULL);
167 memset (i, 0, sizeof (*i));
169 selector = graph_get_selector (cfg);
170 if (selector == NULL)
171 {
172 fprintf (stderr, "inst_create: graph_get_selector failed\n");
173 free (i);
174 return (NULL);
175 }
177 i->select = ident_copy_with_selector (selector, ident,
178 IDENT_FLAG_REPLACE_ANY);
179 if (i->select == NULL)
180 {
181 fprintf (stderr, "inst_create: ident_copy_with_selector failed\n");
182 ident_destroy (selector);
183 free (i);
184 return (NULL);
185 }
187 ident_destroy (selector);
189 i->files = NULL;
190 i->files_num = 0;
192 i->next = NULL;
194 return (i);
195 } /* }}} graph_instance_t *inst_create */
197 void inst_destroy (graph_instance_t *inst) /* {{{ */
198 {
199 graph_instance_t *next;
200 size_t i;
202 if (inst == NULL)
203 return;
205 next = inst->next;
207 ident_destroy (inst->select);
209 for (i = 0; i < inst->files_num; i++)
210 ident_destroy (inst->files[i]);
211 free (inst->files);
213 free (inst);
215 inst_destroy (next);
216 } /* }}} void inst_destroy */
218 int inst_add_file (graph_instance_t *inst, /* {{{ */
219 const graph_ident_t *file)
220 {
221 graph_ident_t **tmp;
223 tmp = realloc (inst->files, sizeof (*inst->files) * (inst->files_num + 1));
224 if (tmp == NULL)
225 return (ENOMEM);
226 inst->files = tmp;
228 inst->files[inst->files_num] = ident_clone (file);
229 if (inst->files[inst->files_num] == NULL)
230 return (ENOMEM);
232 inst->files_num++;
234 return (0);
235 } /* }}} int inst_add_file */
237 graph_instance_t *inst_get_selected (graph_config_t *cfg) /* {{{ */
238 {
239 const char *host = get_part_from_param ("inst_host", "host");
240 const char *plugin = get_part_from_param ("inst_plugin", "plugin");
241 const char *plugin_instance = get_part_from_param ("inst_plugin_instance", "plugin_instance");
242 const char *type = get_part_from_param ("inst_type", "type");
243 const char *type_instance = get_part_from_param ("inst_type_instance", "type_instance");
244 graph_ident_t *ident;
245 graph_instance_t *inst;
247 if (cfg == NULL)
248 cfg = gl_graph_get_selected ();
250 if (cfg == NULL)
251 {
252 DEBUG ("inst_get_selected: cfg == NULL;\n");
253 return (NULL);
254 }
256 if ((host == NULL)
257 || (plugin == NULL) || (plugin_instance == NULL)
258 || (type == NULL) || (type_instance == NULL))
259 {
260 DEBUG ("inst_get_selected: A parameter is NULL.\n");
261 return (NULL);
262 }
264 ident = ident_create (host, plugin, plugin_instance, type, type_instance);
266 for (inst = graph_get_instances (cfg); inst != NULL; inst = inst->next)
267 {
268 if (ident_compare (ident, inst->select) != 0)
269 continue;
271 ident_destroy (ident);
272 return (inst);
273 }
275 DEBUG ("inst_get_selected: No match found.\n");
276 ident_destroy (ident);
277 return (NULL);
278 } /* }}} graph_instance_t *inst_get_selected */
280 int inst_get_rrdargs (graph_config_t *cfg, /* {{{ */
281 graph_instance_t *inst,
282 str_array_t *args)
283 {
284 def_callback_data_t data = { inst, args };
285 graph_def_t *defs;
286 int status;
288 if ((cfg == NULL) || (inst == NULL) || (args == NULL))
289 return (EINVAL);
291 status = graph_get_rrdargs (cfg, inst, args);
292 if (status != 0)
293 return (status);
295 defs = graph_get_defs (cfg);
296 if (defs == NULL)
297 {
298 defs = inst_get_default_defs (cfg, inst);
300 if (defs == NULL)
301 return (-1);
303 status = def_foreach (defs, gl_instance_get_rrdargs_cb, &data);
305 def_destroy (defs);
306 }
307 else
308 {
309 status = def_foreach (defs, gl_instance_get_rrdargs_cb, &data);
310 }
312 return (status);
313 } /* }}} int inst_get_rrdargs */
315 graph_ident_t *inst_get_selector (graph_instance_t *inst) /* {{{ */
316 {
317 if (inst == NULL)
318 return (NULL);
320 return (ident_clone (inst->select));
321 } /* }}} graph_ident_t *inst_get_selector */
323 int inst_get_params (graph_config_t *cfg, graph_instance_t *inst, /* {{{ */
324 char *buffer, size_t buffer_size)
325 {
326 graph_ident_t *cfg_select;
328 if ((cfg == NULL) || (inst == NULL)
329 || (buffer == NULL) || (buffer_size < 1))
330 return (EINVAL);
332 cfg_select = graph_get_selector (cfg);
333 if (cfg_select == NULL)
334 {
335 fprintf (stderr, "inst_get_params: graph_get_selector failed");
336 return (-1);
337 }
339 buffer[0] = 0;
341 #define COPY_FIELD(field) do { \
342 const char *cfg_f = ident_get_##field (cfg_select); \
343 const char *inst_f = ident_get_##field (inst->select); \
344 if (strcmp (cfg_f, inst_f) == 0) \
345 { \
346 strlcat (buffer, #field, buffer_size); \
347 strlcat (buffer, "=", buffer_size); \
348 strlcat (buffer, cfg_f, buffer_size); \
349 } \
350 else \
351 { \
352 strlcat (buffer, "graph_", buffer_size); \
353 strlcat (buffer, #field, buffer_size); \
354 strlcat (buffer, "=", buffer_size); \
355 strlcat (buffer, cfg_f, buffer_size); \
356 strlcat (buffer, ";", buffer_size); \
357 strlcat (buffer, "inst_", buffer_size); \
358 strlcat (buffer, #field, buffer_size); \
359 strlcat (buffer, "=", buffer_size); \
360 strlcat (buffer, inst_f, buffer_size); \
361 } \
362 } while (0)
364 COPY_FIELD(host);
365 strlcat (buffer, ";", buffer_size);
366 COPY_FIELD(plugin);
367 strlcat (buffer, ";", buffer_size);
368 COPY_FIELD(plugin_instance);
369 strlcat (buffer, ";", buffer_size);
370 COPY_FIELD(type);
371 strlcat (buffer, ";", buffer_size);
372 COPY_FIELD(type_instance);
374 #undef COPY_FIELD
376 ident_destroy (cfg_select);
378 return (0);
379 } /* }}} int inst_get_params */
381 int inst_append (graph_instance_t *head, graph_instance_t *inst) /* {{{ */
382 {
383 graph_instance_t *ptr;
385 if ((head == NULL) || (inst == NULL))
386 return (EINVAL);
388 ptr = head;
389 while (ptr->next != NULL)
390 ptr = ptr->next;
392 ptr->next = inst;
394 return (0);
395 } /* }}} int inst_append */
397 int inst_foreach (graph_instance_t *inst, /* {{{ */
398 inst_callback_t cb, void *user_data)
399 {
400 graph_instance_t *ptr;
402 if ((inst == NULL) || (cb == NULL))
403 return (EINVAL);
405 for (ptr = inst; ptr != NULL; ptr = ptr->next)
406 {
407 int status;
409 status = (*cb) (ptr, user_data);
410 if (status != 0)
411 return (status);
412 }
414 return (0);
415 } /* }}} int inst_foreach */
417 graph_instance_t *inst_find_matching (graph_instance_t *inst, /* {{{ */
418 const graph_ident_t *ident)
419 {
420 graph_instance_t *ptr;
422 if ((inst == NULL) || (ident == NULL))
423 return (NULL);
425 for (ptr = inst; ptr != NULL; ptr = ptr->next)
426 if (ident_matches (ptr->select, ident))
427 return (ptr);
429 return (NULL);
430 } /* }}} graph_instance_t *inst_find_matching */
432 int inst_describe (graph_config_t *cfg, graph_instance_t *inst, /* {{{ */
433 char *buffer, size_t buffer_size)
434 {
435 graph_ident_t *cfg_select;
437 if ((cfg == NULL) || (inst == NULL)
438 || (buffer == NULL) || (buffer_size < 2))
439 return (EINVAL);
441 cfg_select = graph_get_selector (cfg);
442 if (cfg_select == NULL)
443 {
444 fprintf (stderr, "inst_describe: graph_get_selector failed\n");
445 return (-1);
446 }
448 buffer[0] = 0;
450 #define CHECK_FIELD(field) do { \
451 if (IS_ANY (ident_get_##field (cfg_select))) \
452 { \
453 if (buffer[0] != 0) \
454 strlcat (buffer, "/", buffer_size); \
455 strlcat (buffer, ident_get_##field (inst->select), buffer_size); \
456 } \
457 } while (0)
459 CHECK_FIELD (host);
460 CHECK_FIELD (plugin);
461 CHECK_FIELD (plugin_instance);
462 CHECK_FIELD (type);
463 CHECK_FIELD (type_instance);
465 #undef CHECK_FIELD
467 if (buffer[0] == 0)
468 strlcat (buffer, "default", buffer_size);
470 ident_destroy (cfg_select);
472 return (0);
473 } /* }}} int inst_describe */
475 /* vim: set sw=2 sts=2 et fdm=marker : */