b9335818c203a753cd3fa84ae2db18b270e7cfe7
1 /*
2 * SysDB - src/core/store.c
3 * Copyright (C) 2012 Sebastian 'tokkee' Harl <sh@tokkee.org>
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
17 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
18 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR
19 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
20 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
28 #include "sysdb.h"
29 #include "core/store.h"
30 #include "core/error.h"
31 #include "core/plugin.h"
32 #include "utils/llist.h"
34 #include <assert.h>
36 #include <errno.h>
38 #include <stdio.h>
39 #include <stdlib.h>
40 #include <string.h>
42 #include <pthread.h>
44 /*
45 * private variables
46 */
48 static sdb_llist_t *host_list = NULL;
49 static pthread_rwlock_t host_lock = PTHREAD_RWLOCK_INITIALIZER;
51 /*
52 * public types
53 */
55 static int
56 sdb_host_init(sdb_object_t *obj, va_list __attribute__((unused)) ap)
57 {
58 SDB_HOST(obj)->_last_update = sdb_gettime();
59 /* ignore errors -> last_update will be updated later */
61 SDB_HOST(obj)->attributes = sdb_llist_create();
62 if (! SDB_HOST(obj)->attributes)
63 return -1;
64 SDB_HOST(obj)->services = sdb_llist_create();
65 if (! SDB_HOST(obj)->services)
66 return -1;
67 return 0;
68 } /* sdb_host_init */
70 static void
71 sdb_host_destroy(sdb_object_t *obj)
72 {
73 assert(obj);
75 if (SDB_HOST(obj)->attributes)
76 sdb_llist_destroy(SDB_HOST(obj)->attributes);
77 if (SDB_HOST(obj)->services)
78 sdb_llist_destroy(SDB_HOST(obj)->services);
79 } /* sdb_host_destroy */
81 static sdb_object_t *
82 sdb_host_do_clone(const sdb_object_t *obj)
83 {
84 const sdb_host_t *host = (const sdb_host_t *)obj;
85 sdb_host_t *new;
87 new = SDB_HOST(sdb_object_create(obj->name, sdb_host_type));
88 if (! new)
89 return NULL;
91 /* make sure these are initialized; else sdb_object_deref() might access
92 * arbitrary memory in case of an error */
93 new->services = new->attributes = NULL;
95 if (host->attributes) {
96 new->attributes = sdb_llist_clone(host->attributes);
97 if (! new->attributes) {
98 sdb_object_deref(SDB_OBJ(new));
99 return NULL;
100 }
101 }
103 new->_last_update = host->_last_update;
104 if (host->services) {
105 new->services = sdb_llist_clone(host->services);
106 if (! new->services) {
107 sdb_object_deref(SDB_OBJ(new));
108 return NULL;
109 }
110 }
111 return SDB_OBJ(new);
112 } /* sdb_host_do_clone */
114 static int
115 sdb_attr_init(sdb_object_t *obj, va_list ap)
116 {
117 const char *hostname = va_arg(ap, const char *);
118 const char *value = va_arg(ap, const char *);
120 SDB_ATTR(obj)->hostname = strdup(hostname);
121 SDB_ATTR(obj)->attr_value = strdup(value);
122 if ((! SDB_ATTR(obj)->hostname) || (! SDB_ATTR(obj)->attr_value))
123 return -1;
125 SDB_ATTR(obj)->_last_update = sdb_gettime();
126 return 0;
127 } /* sdb_attr_init */
129 static void
130 sdb_attr_destroy(sdb_object_t *obj)
131 {
132 assert(obj);
134 if (SDB_ATTR(obj)->hostname)
135 free(SDB_ATTR(obj)->hostname);
136 if (SDB_ATTR(obj)->attr_value)
137 free(SDB_ATTR(obj)->attr_value);
138 } /* sdb_attr_destroy */
140 static sdb_object_t *
141 sdb_attr_clone(const sdb_object_t *obj)
142 {
143 const sdb_attribute_t *attr = (const sdb_attribute_t *)obj;
144 sdb_attribute_t *new;
146 new = sdb_attribute_create(attr->hostname,
147 obj->name, attr->attr_value);
148 if (! new)
149 return NULL;
151 new->_last_update = attr->_last_update;
152 return SDB_OBJ(new);
153 } /* sdb_attr_clone */
155 static int
156 sdb_svc_init(sdb_object_t *obj, va_list ap)
157 {
158 const char *hostname = va_arg(ap, const char *);
160 SDB_SVC(obj)->hostname = strdup(hostname);
161 if (! SDB_SVC(obj)->hostname)
162 return -1;
164 SDB_SVC(obj)->_last_update = sdb_gettime();
165 /* ignore errors -> last_update will be updated later */
166 return 0;
167 } /* sdb_svc_init */
169 static void
170 sdb_svc_destroy(sdb_object_t *obj)
171 {
172 assert(obj);
174 if (SDB_SVC(obj)->hostname)
175 free(SDB_SVC(obj)->hostname);
176 } /* sdb_svc_destroy */
178 static sdb_object_t *
179 sdb_svc_clone(const sdb_object_t *obj)
180 {
181 const sdb_service_t *svc = (const sdb_service_t *)obj;
182 sdb_service_t *new;
184 new = sdb_service_create(svc->hostname, obj->name);
185 if (! new)
186 return NULL;
188 new->_last_update = svc->_last_update;
189 return SDB_OBJ(new);
190 } /* sdb_svc_clone */
192 const sdb_type_t sdb_host_type = {
193 sizeof(sdb_host_t),
195 sdb_host_init,
196 sdb_host_destroy,
197 sdb_host_do_clone
198 };
200 const sdb_type_t sdb_attribute_type = {
201 sizeof(sdb_attribute_t),
203 sdb_attr_init,
204 sdb_attr_destroy,
205 sdb_attr_clone
206 };
208 const sdb_type_t sdb_service_type = {
209 sizeof(sdb_service_t),
211 sdb_svc_init,
212 sdb_svc_destroy,
213 sdb_svc_clone
214 };
216 /*
217 * public API
218 */
220 int
221 sdb_store_host(const char *name, sdb_time_t last_update)
222 {
223 sdb_host_t *old;
225 char *cname;
226 int status = 0;
228 if (! name)
229 return -1;
231 cname = sdb_plugin_cname(strdup(name));
232 if (! cname) {
233 sdb_log(SDB_LOG_ERR, "store: strdup failed");
234 return -1;
235 }
237 last_update = last_update;
238 if (last_update <= 0)
239 last_update = sdb_gettime();
241 pthread_rwlock_wrlock(&host_lock);
243 if (! host_list) {
244 if (! (host_list = sdb_llist_create())) {
245 pthread_rwlock_unlock(&host_lock);
246 return -1;
247 }
248 }
250 old = SDB_HOST(sdb_llist_search_by_name(host_list, cname));
252 if (old) {
253 if (old->_last_update > last_update) {
254 sdb_log(SDB_LOG_DEBUG, "store: Cannot update host '%s' - "
255 "value too old (%"PRIscTIME" < %"PRIscTIME")",
256 cname, last_update, old->_last_update);
257 /* don't report an error; the host may be updated by multiple
258 * backends */
259 status = 1;
260 }
261 else {
262 old->_last_update = last_update;
263 }
264 }
265 else {
266 sdb_host_t *new = SDB_HOST(sdb_object_create(name, sdb_host_type));
267 if (! new) {
268 char errbuf[1024];
269 sdb_log(SDB_LOG_ERR, "store: Failed to clone host object: %s",
270 sdb_strerror(errno, errbuf, sizeof(errbuf)));
271 pthread_rwlock_unlock(&host_lock);
272 return -1;
273 }
275 free(SDB_OBJ(new)->name);
276 SDB_OBJ(new)->name = cname;
278 if (! new->attributes) {
279 if (! (new->attributes = sdb_llist_create())) {
280 char errbuf[1024];
281 sdb_log(SDB_LOG_ERR, "store: Failed to initialize "
282 "host object '%s': %s", SDB_OBJ(new)->name,
283 sdb_strerror(errno, errbuf, sizeof(errbuf)));
284 sdb_object_deref(SDB_OBJ(new));
285 pthread_rwlock_unlock(&host_lock);
286 return -1;
287 }
288 }
290 if (! new->services) {
291 if (! (new->services = sdb_llist_create())) {
292 char errbuf[1024];
293 sdb_log(SDB_LOG_ERR, "store: Failed to initialize "
294 "host object '%s': %s", SDB_OBJ(new)->name,
295 sdb_strerror(errno, errbuf, sizeof(errbuf)));
296 sdb_object_deref(SDB_OBJ(new));
297 pthread_rwlock_unlock(&host_lock);
298 return -1;
299 }
300 }
302 status = sdb_llist_insert_sorted(host_list, SDB_OBJ(new),
303 sdb_object_cmp_by_name);
305 /* pass control to the list or destroy in case of an error */
306 sdb_object_deref(SDB_OBJ(new));
307 }
309 pthread_rwlock_unlock(&host_lock);
310 return status;
311 } /* sdb_store_host */
313 _Bool
314 sdb_store_has_host(const char *name)
315 {
316 sdb_host_t *host;
318 if (! name)
319 return NULL;
321 host = SDB_HOST(sdb_llist_search_by_name(host_list, name));
322 return host != NULL;
323 } /* sdb_store_has_host */
325 sdb_attribute_t *
326 sdb_attribute_create(const char *hostname,
327 const char *name, const char *value)
328 {
329 sdb_object_t *obj;
331 if ((! hostname) || (! name) || (! value))
332 return NULL;
334 obj = sdb_object_create(name, sdb_attribute_type, hostname, value);
335 if (! obj)
336 return NULL;
337 return SDB_ATTR(obj);
338 } /* sdb_attribute_create */
340 int
341 sdb_store_attribute(const sdb_attribute_t *attr)
342 {
343 sdb_host_t *host;
344 sdb_attribute_t *old;
345 sdb_time_t last_update;
347 int status = 0;
349 if (! attr)
350 return -1;
352 last_update = attr->_last_update;
353 if (last_update <= 0)
354 last_update = sdb_gettime();
356 if (! host_list)
357 return -1;
359 pthread_rwlock_wrlock(&host_lock);
361 host = SDB_HOST(sdb_llist_search_by_name(host_list, attr->hostname));
362 if (! host) {
363 pthread_rwlock_unlock(&host_lock);
364 return -1;
365 }
367 old = SDB_ATTR(sdb_llist_search_by_name(host->attributes,
368 SDB_CONST_OBJ(attr)->name));
369 if (old) {
370 if (old->_last_update > last_update) {
371 sdb_log(SDB_LOG_DEBUG, "store: Cannot update attribute "
372 "'%s/%s' - value too old (%"PRIscTIME" < %"PRIscTIME")",
373 attr->hostname, SDB_CONST_OBJ(attr)->name, last_update,
374 old->_last_update);
375 status = 1;
376 }
377 else {
378 old->_last_update = last_update;
379 }
380 }
381 else {
382 sdb_attribute_t *new = SDB_ATTR(sdb_object_clone(SDB_CONST_OBJ(attr)));
383 if (! new) {
384 char errbuf[1024];
385 sdb_log(SDB_LOG_ERR, "store: Failed to clone attribute "
386 "object: %s", sdb_strerror(errno, errbuf, sizeof(errbuf)));
387 pthread_rwlock_unlock(&host_lock);
388 return -1;
389 }
391 status = sdb_llist_insert_sorted(host->attributes, SDB_OBJ(new),
392 sdb_object_cmp_by_name);
394 /* pass control to the list or destroy in case of an error */
395 sdb_object_deref(SDB_OBJ(new));
396 }
398 pthread_rwlock_unlock(&host_lock);
399 return status;
400 } /* sdb_store_attribute */
402 sdb_service_t *
403 sdb_service_create(const char *hostname, const char *name)
404 {
405 sdb_object_t *obj;
407 if ((! hostname) || (! name))
408 return NULL;
410 obj = sdb_object_create(name, sdb_service_type, hostname);
411 if (! obj)
412 return NULL;
413 return SDB_SVC(obj);
414 } /* sdb_service_create */
416 int
417 sdb_store_service(const sdb_service_t *svc)
418 {
419 sdb_host_t *host;
420 sdb_service_t *old;
421 sdb_time_t last_update;
423 int status = 0;
425 if (! svc)
426 return -1;
428 last_update = svc->_last_update;
429 if (last_update <= 0)
430 last_update = sdb_gettime();
432 if (! host_list)
433 return -1;
435 pthread_rwlock_wrlock(&host_lock);
437 host = SDB_HOST(sdb_llist_search_by_name(host_list, svc->hostname));
438 if (! host) {
439 pthread_rwlock_unlock(&host_lock);
440 return -1;
441 }
443 old = SDB_SVC(sdb_llist_search_by_name(host->services,
444 SDB_CONST_OBJ(svc)->name));
445 if (old) {
446 if (old->_last_update > last_update) {
447 sdb_log(SDB_LOG_DEBUG, "store: Cannot update service "
448 "'%s/%s' - value too old (%"PRIscTIME" < %"PRIscTIME")",
449 svc->hostname, SDB_CONST_OBJ(svc)->name, last_update,
450 old->_last_update);
451 status = 1;
452 }
453 else {
454 old->_last_update = last_update;
455 }
456 }
457 else {
458 sdb_service_t *new = SDB_SVC(sdb_object_clone(SDB_CONST_OBJ(svc)));
459 if (! new) {
460 char errbuf[1024];
461 sdb_log(SDB_LOG_ERR, "store: Failed to clone service "
462 "object: %s", sdb_strerror(errno, errbuf, sizeof(errbuf)));
463 pthread_rwlock_unlock(&host_lock);
464 return -1;
465 }
467 status = sdb_llist_insert_sorted(host->services, SDB_OBJ(new),
468 sdb_object_cmp_by_name);
470 /* pass control to the list or destroy in case of an error */
471 sdb_object_deref(SDB_OBJ(new));
472 }
474 pthread_rwlock_unlock(&host_lock);
475 return status;
476 } /* sdb_store_service */
478 const sdb_service_t *
479 sdb_store_get_service(const sdb_host_t *host, const char *name)
480 {
481 sdb_service_t *svc;
483 if ((! host) || (! name))
484 return NULL;
486 svc = SDB_SVC(sdb_llist_search_by_name(host->services, name));
487 if (! svc)
488 return NULL;
489 return svc;
490 } /* sdb_store_get_service */
492 int
493 sdb_store_dump(FILE *fh)
494 {
495 sdb_llist_iter_t *host_iter;
497 if (! fh)
498 return -1;
500 pthread_rwlock_rdlock(&host_lock);
502 host_iter = sdb_llist_get_iter(host_list);
503 if (! host_iter) {
504 pthread_rwlock_unlock(&host_lock);
505 return -1;
506 }
508 while (sdb_llist_iter_has_next(host_iter)) {
509 sdb_host_t *host = SDB_HOST(sdb_llist_iter_get_next(host_iter));
510 sdb_llist_iter_t *svc_iter;
511 sdb_llist_iter_t *attr_iter;
513 char time_str[64];
515 assert(host);
517 if (! sdb_strftime(time_str, sizeof(time_str),
518 "%F %T %z", host->_last_update))
519 snprintf(time_str, sizeof(time_str), "<error>");
520 time_str[sizeof(time_str) - 1] = '\0';
522 fprintf(fh, "Host '%s' (last updated: %s):\n",
523 SDB_OBJ(host)->name, time_str);
525 attr_iter = sdb_llist_get_iter(host->attributes);
526 if (! attr_iter) {
527 char errbuf[1024];
528 fprintf(fh, "Failed to retrieve attributes: %s\n",
529 sdb_strerror(errno, errbuf, sizeof(errbuf)));
530 continue;
531 }
533 while (sdb_llist_iter_has_next(attr_iter)) {
534 sdb_attribute_t *attr = SDB_ATTR(sdb_llist_iter_get_next(attr_iter));
535 assert(attr);
537 if (! sdb_strftime(time_str, sizeof(time_str),
538 "%F %T %z", attr->_last_update))
539 snprintf(time_str, sizeof(time_str), "<error>");
540 time_str[sizeof(time_str) - 1] = '\0';
542 fprintf(fh, "\tAttribute '%s' -> '%s' (last updated: %s)\n",
543 SDB_OBJ(attr)->name, attr->attr_value, time_str);
544 }
546 sdb_llist_iter_destroy(attr_iter);
548 svc_iter = sdb_llist_get_iter(host->services);
549 if (! svc_iter) {
550 char errbuf[1024];
551 fprintf(fh, "Failed to retrieve services: %s\n",
552 sdb_strerror(errno, errbuf, sizeof(errbuf)));
553 continue;
554 }
556 while (sdb_llist_iter_has_next(svc_iter)) {
557 sdb_service_t *svc = SDB_SVC(sdb_llist_iter_get_next(svc_iter));
558 assert(svc);
560 if (! sdb_strftime(time_str, sizeof(time_str),
561 "%F %T %z", svc->_last_update))
562 snprintf(time_str, sizeof(time_str), "<error>");
563 time_str[sizeof(time_str) - 1] = '\0';
565 fprintf(fh, "\tService '%s' (last updated: %s)\n",
566 SDB_OBJ(svc)->name, time_str);
567 }
569 sdb_llist_iter_destroy(svc_iter);
570 }
572 sdb_llist_iter_destroy(host_iter);
573 pthread_rwlock_unlock(&host_lock);
574 return 0;
575 } /* sdb_store_dump */
577 /* vim: set tw=78 sw=4 ts=4 noexpandtab : */