4e841bac0022040ca77cd5fedcfa55aab1f4e2a1
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 "utils/error.h"
31 #include "utils/llist.h"
33 #include <assert.h>
35 #include <errno.h>
37 #include <stdio.h>
38 #include <stdlib.h>
39 #include <string.h>
41 #include <pthread.h>
43 /*
44 * private data types
45 */
47 /* type used for looking up named objects */
48 typedef struct {
49 sdb_object_t parent;
50 const char *obj_name;
51 } sdb_store_lookup_obj_t;
52 #define SDB_STORE_LOOKUP_OBJ_INIT { SDB_OBJECT_INIT, NULL }
54 /*
55 * private variables
56 */
58 static sdb_llist_t *host_list = NULL;
59 static pthread_rwlock_t host_lock = PTHREAD_RWLOCK_INITIALIZER;
61 /*
62 * private helper functions
63 */
65 static int
66 sdb_store_obj_cmp_by_name(const sdb_object_t *a, const sdb_object_t *b)
67 {
68 const sdb_store_obj_t *h1 = (const sdb_store_obj_t *)a;
69 const sdb_store_obj_t *h2 = (const sdb_store_obj_t *)b;
71 assert(h1 && h2);
72 return strcasecmp(h1->name, h2->name);
73 } /* sdb_store_obj_cmp_by_name */
75 static int
76 sdb_cmp_store_obj_with_name(const sdb_object_t *a, const sdb_object_t *b)
77 {
78 const sdb_store_obj_t *obj = (const sdb_store_obj_t *)a;
79 const sdb_store_lookup_obj_t *lookup = (const sdb_store_lookup_obj_t *)b;
81 assert(obj && lookup);
82 return strcasecmp(obj->name, lookup->obj_name);
83 } /* sdb_cmp_store_obj_with_name */
85 static int
86 sdb_host_init(sdb_object_t *obj, va_list ap)
87 {
88 const char *name = va_arg(ap, const char *);
90 SDB_HOST(obj)->_name = strdup(name);
91 if (! SDB_HOST(obj)->_name)
92 return -1;
94 SDB_HOST(obj)->_last_update = sdb_gettime();
95 /* ignore errors -> last_update will be updated later */
97 SDB_HOST(obj)->attributes = sdb_llist_create();
98 if (! SDB_HOST(obj)->attributes)
99 return -1;
100 SDB_HOST(obj)->services = sdb_llist_create();
101 if (! SDB_HOST(obj)->services)
102 return -1;
103 return 0;
104 } /* sdb_host_init */
106 static void
107 sdb_host_destroy(sdb_object_t *obj)
108 {
109 assert(obj);
111 if (SDB_HOST(obj)->_name)
112 free(SDB_HOST(obj)->_name);
114 if (SDB_HOST(obj)->attributes)
115 sdb_llist_destroy(SDB_HOST(obj)->attributes);
116 if (SDB_HOST(obj)->services)
117 sdb_llist_destroy(SDB_HOST(obj)->services);
118 } /* sdb_host_destroy */
120 static int
121 sdb_attr_init(sdb_object_t *obj, va_list ap)
122 {
123 const char *hostname = va_arg(ap, const char *);
124 const char *name = va_arg(ap, const char *);
125 const char *value = va_arg(ap, const char *);
127 SDB_ATTR(obj)->hostname = strdup(hostname);
128 SDB_ATTR(obj)->_name = strdup(name);
129 SDB_ATTR(obj)->attr_value = strdup(value);
130 if ((! SDB_ATTR(obj)->hostname)
131 || (! SDB_ATTR(obj)->_name) || (! SDB_ATTR(obj)->attr_value))
132 return -1;
134 SDB_ATTR(obj)->_last_update = sdb_gettime();
135 return 0;
136 } /* sdb_attr_init */
138 static void
139 sdb_attr_destroy(sdb_object_t *obj)
140 {
141 assert(obj);
143 if (SDB_ATTR(obj)->hostname)
144 free(SDB_ATTR(obj)->hostname);
145 if (SDB_ATTR(obj)->_name)
146 free(SDB_ATTR(obj)->_name);
147 if (SDB_ATTR(obj)->attr_value)
148 free(SDB_ATTR(obj)->attr_value);
149 } /* sdb_attr_destroy */
151 static int
152 sdb_svc_init(sdb_object_t *obj, va_list ap)
153 {
154 const char *hostname = va_arg(ap, const char *);
155 const char *name = va_arg(ap, const char *);
157 SDB_SVC(obj)->hostname = strdup(hostname);
158 SDB_SVC(obj)->_name = strdup(name);
159 if ((! SDB_SVC(obj)->hostname) || (! SDB_SVC(obj)->_name))
160 return -1;
162 SDB_SVC(obj)->_last_update = sdb_gettime();
163 /* ignore errors -> last_update will be updated later */
164 return 0;
165 } /* sdb_svc_init */
167 static void
168 sdb_svc_destroy(sdb_object_t *obj)
169 {
170 assert(obj);
172 if (SDB_SVC(obj)->hostname)
173 free(SDB_SVC(obj)->hostname);
174 if (SDB_SVC(obj)->_name)
175 free(SDB_SVC(obj)->_name);
176 } /* sdb_svc_destroy */
178 /*
179 * public API
180 */
182 sdb_host_t *
183 sdb_host_create(const char *name)
184 {
185 sdb_object_t *obj;
187 if (! name)
188 return NULL;
190 obj = sdb_object_create(sizeof(sdb_host_t), sdb_host_init,
191 sdb_host_destroy, name);
192 if (! obj)
193 return NULL;
194 return SDB_HOST(obj);
195 } /* sdb_host_create */
197 sdb_host_t *
198 sdb_host_clone(const sdb_host_t *host)
199 {
200 sdb_host_t *new;
202 new = sdb_host_create(host->_name);
203 if (! new)
204 return NULL;
206 /* make sure these are initialized; else sdb_object_deref() might access
207 * arbitrary memory in case of an error */
208 new->services = new->attributes = NULL;
210 if (host->attributes) {
211 new->attributes = sdb_llist_clone(host->attributes);
212 if (! new->attributes) {
213 sdb_object_deref(SDB_OBJ(new));
214 return NULL;
215 }
216 }
218 new->_last_update = host->_last_update;
219 if (host->services) {
220 new->services = sdb_llist_clone(host->services);
221 if (! new->services) {
222 sdb_object_deref(SDB_OBJ(new));
223 return NULL;
224 }
225 }
226 return new;
227 } /* sdb_host_clone */
229 int
230 sdb_store_host(const sdb_host_t *host)
231 {
232 sdb_store_lookup_obj_t lookup = SDB_STORE_LOOKUP_OBJ_INIT;
233 sdb_time_t last_update;
235 sdb_host_t *old;
236 int status = 0;
238 if ((! host) || (! host->_name))
239 return -1;
241 last_update = host->_last_update;
242 if (last_update <= 0)
243 last_update = sdb_gettime();
245 pthread_rwlock_wrlock(&host_lock);
247 if (! host_list) {
248 if (! (host_list = sdb_llist_create())) {
249 pthread_rwlock_unlock(&host_lock);
250 return -1;
251 }
252 }
254 lookup.obj_name = host->_name;
255 old = SDB_HOST(sdb_llist_search(host_list, (const sdb_object_t *)&lookup,
256 sdb_cmp_store_obj_with_name));
258 if (old) {
259 if (old->_last_update > last_update) {
260 sdb_log(SDB_LOG_DEBUG, "store: Cannot update host '%s' - "
261 "value too old (%"PRIscTIME" < %"PRIscTIME")",
262 host->_name, last_update, old->_last_update);
263 /* don't report an error; the host may be updated by multiple
264 * backends */
265 status = 1;
266 }
267 else {
268 old->_last_update = last_update;
269 }
270 }
271 else {
272 sdb_host_t *new = sdb_host_clone(host);
273 if (! new) {
274 char errbuf[1024];
275 sdb_log(SDB_LOG_ERR, "store: Failed to clone host object: %s",
276 sdb_strerror(errno, errbuf, sizeof(errbuf)));
277 pthread_rwlock_unlock(&host_lock);
278 return -1;
279 }
281 if (! new->attributes) {
282 if (! (new->attributes = sdb_llist_create())) {
283 char errbuf[1024];
284 sdb_log(SDB_LOG_ERR, "store: Failed to initialize "
285 "host object '%s': %s", host->_name,
286 sdb_strerror(errno, errbuf, sizeof(errbuf)));
287 sdb_object_deref(SDB_OBJ(new));
288 pthread_rwlock_unlock(&host_lock);
289 return -1;
290 }
291 }
293 if (! new->services) {
294 if (! (new->services = sdb_llist_create())) {
295 char errbuf[1024];
296 sdb_log(SDB_LOG_ERR, "store: Failed to initialize "
297 "host object '%s': %s", host->_name,
298 sdb_strerror(errno, errbuf, sizeof(errbuf)));
299 sdb_object_deref(SDB_OBJ(new));
300 pthread_rwlock_unlock(&host_lock);
301 return -1;
302 }
303 }
305 status = sdb_llist_insert_sorted(host_list, SDB_OBJ(new),
306 sdb_store_obj_cmp_by_name);
308 /* pass control to the list or destroy in case of an error */
309 sdb_object_deref(SDB_OBJ(new));
310 }
312 pthread_rwlock_unlock(&host_lock);
313 return status;
314 } /* sdb_store_host */
316 const sdb_host_t *
317 sdb_store_get_host(const char *name)
318 {
319 sdb_store_lookup_obj_t lookup = SDB_STORE_LOOKUP_OBJ_INIT;
320 sdb_host_t *host;
322 if (! name)
323 return NULL;
325 lookup.obj_name = name;
326 host = SDB_HOST(sdb_llist_search(host_list, (const sdb_object_t *)&lookup,
327 sdb_cmp_store_obj_with_name));
329 if (! host)
330 return NULL;
331 return host;
332 } /* sdb_store_get_host */
334 sdb_attribute_t *
335 sdb_attribute_create(const char *hostname,
336 const char *name, const char *value)
337 {
338 sdb_object_t *obj;
340 if ((! hostname) || (! name) || (! value))
341 return NULL;
343 obj = sdb_object_create(sizeof(sdb_attribute_t), sdb_attr_init,
344 sdb_attr_destroy, hostname, name, value);
345 if (! obj)
346 return NULL;
347 return SDB_ATTR(obj);
348 } /* sdb_attribute_create */
350 sdb_attribute_t *
351 sdb_attribute_clone(const sdb_attribute_t *attr)
352 {
353 sdb_attribute_t *new;
355 new = sdb_attribute_create(attr->hostname,
356 attr->_name, attr->attr_value);
357 if (! new)
358 return NULL;
360 new->_last_update = attr->_last_update;
361 return new;
362 } /* sdb_attribute_clone */
364 int
365 sdb_store_attribute(const sdb_attribute_t *attr)
366 {
367 sdb_store_lookup_obj_t lookup = SDB_STORE_LOOKUP_OBJ_INIT;
368 sdb_host_t *host;
370 sdb_attribute_t *old;
372 sdb_time_t last_update;
374 int status = 0;
376 if (! attr)
377 return -1;
379 last_update = attr->_last_update;
380 if (last_update <= 0)
381 last_update = sdb_gettime();
383 if (! host_list)
384 return -1;
386 pthread_rwlock_wrlock(&host_lock);
388 lookup.obj_name = attr->hostname;
389 host = SDB_HOST(sdb_llist_search(host_list, (const sdb_object_t *)&lookup,
390 sdb_cmp_store_obj_with_name));
392 if (! host) {
393 pthread_rwlock_unlock(&host_lock);
394 return -1;
395 }
397 lookup.obj_name = attr->_name;
398 old = SDB_ATTR(sdb_llist_search(host->attributes,
399 (const sdb_object_t *)&lookup,
400 sdb_cmp_store_obj_with_name));
402 if (old) {
403 if (old->_last_update > last_update) {
404 sdb_log(SDB_LOG_DEBUG, "store: Cannot update attribute "
405 "'%s/%s' - value too old (%"PRIscTIME" < %"PRIscTIME")",
406 attr->hostname, attr->_name, last_update,
407 old->_last_update);
408 status = 1;
409 }
410 else {
411 old->_last_update = last_update;
412 }
413 }
414 else {
415 sdb_attribute_t *new = sdb_attribute_clone(attr);
416 if (! new) {
417 char errbuf[1024];
418 sdb_log(SDB_LOG_ERR, "store: Failed to clone attribute "
419 "object: %s", sdb_strerror(errno, errbuf, sizeof(errbuf)));
420 pthread_rwlock_unlock(&host_lock);
421 return -1;
422 }
424 status = sdb_llist_insert_sorted(host->attributes, SDB_OBJ(new),
425 sdb_store_obj_cmp_by_name);
427 /* pass control to the list or destroy in case of an error */
428 sdb_object_deref(SDB_OBJ(new));
429 }
431 pthread_rwlock_unlock(&host_lock);
432 return status;
433 } /* sdb_store_attribute */
435 sdb_service_t *
436 sdb_service_create(const char *hostname, const char *name)
437 {
438 sdb_object_t *obj;
440 if ((! hostname) || (! name))
441 return NULL;
443 obj = sdb_object_create(sizeof(sdb_service_t), sdb_svc_init,
444 sdb_svc_destroy, hostname, name);
445 if (! obj)
446 return NULL;
447 return SDB_SVC(obj);
448 } /* sdb_service_create */
450 sdb_service_t *
451 sdb_service_clone(const sdb_service_t *svc)
452 {
453 sdb_service_t *new;
455 new = sdb_service_create(svc->hostname, svc->_name);
456 if (! new)
457 return NULL;
459 new->_last_update = svc->_last_update;
460 return new;
461 } /* sdb_service_clone */
463 int
464 sdb_store_service(const sdb_service_t *svc)
465 {
466 sdb_store_lookup_obj_t lookup = SDB_STORE_LOOKUP_OBJ_INIT;
467 sdb_host_t *host;
469 sdb_service_t *old;
471 sdb_time_t last_update;
473 int status = 0;
475 if (! svc)
476 return -1;
478 last_update = svc->_last_update;
479 if (last_update <= 0)
480 last_update = sdb_gettime();
482 if (! host_list)
483 return -1;
485 pthread_rwlock_wrlock(&host_lock);
487 lookup.obj_name = svc->hostname;
488 host = SDB_HOST(sdb_llist_search(host_list, (const sdb_object_t *)&lookup,
489 sdb_cmp_store_obj_with_name));
491 if (! host) {
492 pthread_rwlock_unlock(&host_lock);
493 return -1;
494 }
496 lookup.obj_name = svc->_name;
497 old = SDB_SVC(sdb_llist_search(host->services, (const sdb_object_t *)&lookup,
498 sdb_cmp_store_obj_with_name));
500 if (old) {
501 if (old->_last_update > last_update) {
502 sdb_log(SDB_LOG_DEBUG, "store: Cannot update service "
503 "'%s/%s' - value too old (%"PRIscTIME" < %"PRIscTIME")",
504 svc->hostname, svc->_name, last_update,
505 old->_last_update);
506 status = 1;
507 }
508 else {
509 old->_last_update = last_update;
510 }
511 }
512 else {
513 sdb_service_t *new = sdb_service_clone(svc);
514 if (! new) {
515 char errbuf[1024];
516 sdb_log(SDB_LOG_ERR, "store: Failed to clone service "
517 "object: %s", sdb_strerror(errno, errbuf, sizeof(errbuf)));
518 pthread_rwlock_unlock(&host_lock);
519 return -1;
520 }
522 status = sdb_llist_insert_sorted(host->services, SDB_OBJ(new),
523 sdb_store_obj_cmp_by_name);
525 /* pass control to the list or destroy in case of an error */
526 sdb_object_deref(SDB_OBJ(new));
527 }
529 pthread_rwlock_unlock(&host_lock);
530 return status;
531 } /* sdb_store_service */
533 const sdb_service_t *
534 sdb_store_get_service(const sdb_host_t *host, const char *name)
535 {
536 sdb_store_lookup_obj_t lookup = SDB_STORE_LOOKUP_OBJ_INIT;
537 sdb_service_t *svc;
539 if ((! host) || (! name))
540 return NULL;
542 lookup.obj_name = name;
543 svc = SDB_SVC(sdb_llist_search(host->services,
544 (const sdb_object_t *)&lookup,
545 sdb_cmp_store_obj_with_name));
547 if (! svc)
548 return NULL;
549 return svc;
550 } /* sdb_store_get_service */
552 int
553 sdb_store_dump(FILE *fh)
554 {
555 sdb_llist_iter_t *host_iter;
557 if (! fh)
558 return -1;
560 pthread_rwlock_rdlock(&host_lock);
562 host_iter = sdb_llist_get_iter(host_list);
563 if (! host_iter) {
564 pthread_rwlock_unlock(&host_lock);
565 return -1;
566 }
568 while (sdb_llist_iter_has_next(host_iter)) {
569 sdb_host_t *host = SDB_HOST(sdb_llist_iter_get_next(host_iter));
570 sdb_llist_iter_t *svc_iter;
571 sdb_llist_iter_t *attr_iter;
573 char time_str[64];
575 assert(host);
577 if (! sdb_strftime(time_str, sizeof(time_str),
578 "%F %T %z", host->_last_update))
579 snprintf(time_str, sizeof(time_str), "<error>");
580 time_str[sizeof(time_str) - 1] = '\0';
582 fprintf(fh, "Host '%s' (last updated: %s):\n",
583 host->_name, time_str);
585 attr_iter = sdb_llist_get_iter(host->attributes);
586 if (! attr_iter) {
587 char errbuf[1024];
588 fprintf(fh, "Failed to retrieve attributes: %s\n",
589 sdb_strerror(errno, errbuf, sizeof(errbuf)));
590 continue;
591 }
593 while (sdb_llist_iter_has_next(attr_iter)) {
594 sdb_attribute_t *attr = SDB_ATTR(sdb_llist_iter_get_next(attr_iter));
595 assert(attr);
597 if (! sdb_strftime(time_str, sizeof(time_str),
598 "%F %T %z", attr->_last_update))
599 snprintf(time_str, sizeof(time_str), "<error>");
600 time_str[sizeof(time_str) - 1] = '\0';
602 fprintf(fh, "\tAttribute '%s' -> '%s' (last updated: %s)\n",
603 attr->_name, attr->attr_value, time_str);
604 }
606 sdb_llist_iter_destroy(attr_iter);
608 svc_iter = sdb_llist_get_iter(host->services);
609 if (! svc_iter) {
610 char errbuf[1024];
611 fprintf(fh, "Failed to retrieve services: %s\n",
612 sdb_strerror(errno, errbuf, sizeof(errbuf)));
613 continue;
614 }
616 while (sdb_llist_iter_has_next(svc_iter)) {
617 sdb_service_t *svc = SDB_SVC(sdb_llist_iter_get_next(svc_iter));
618 assert(svc);
620 if (! sdb_strftime(time_str, sizeof(time_str),
621 "%F %T %z", svc->_last_update))
622 snprintf(time_str, sizeof(time_str), "<error>");
623 time_str[sizeof(time_str) - 1] = '\0';
625 fprintf(fh, "\tService '%s' (last updated: %s)\n",
626 svc->_name, time_str);
627 }
629 sdb_llist_iter_destroy(svc_iter);
630 }
632 sdb_llist_iter_destroy(host_iter);
633 pthread_rwlock_unlock(&host_lock);
634 return 0;
635 } /* sdb_store_dump */
637 /* vim: set tw=78 sw=4 ts=4 noexpandtab : */