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17#include <linux/types.h>
18#include <linux/rculist.h>
19#include <linux/skbuff.h>
20#include <linux/spinlock.h>
21#include <linux/string.h>
22#include <linux/audit.h>
23#include <linux/slab.h>
24#include <net/netlabel.h>
25#include <net/cipso_ipv4.h>
26#include <net/calipso.h>
27#include <asm/bug.h>
28
29#include "netlabel_mgmt.h"
30#include "netlabel_addrlist.h"
31#include "netlabel_calipso.h"
32#include "netlabel_domainhash.h"
33#include "netlabel_user.h"
34
35struct netlbl_domhsh_tbl {
36 struct list_head *tbl;
37 u32 size;
38};
39
40
41
42
43static DEFINE_SPINLOCK(netlbl_domhsh_lock);
44#define netlbl_domhsh_rcu_deref(p) \
45 rcu_dereference_check(p, lockdep_is_held(&netlbl_domhsh_lock))
46static struct netlbl_domhsh_tbl __rcu *netlbl_domhsh;
47static struct netlbl_dom_map __rcu *netlbl_domhsh_def_ipv4;
48static struct netlbl_dom_map __rcu *netlbl_domhsh_def_ipv6;
49
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62
63
64static void netlbl_domhsh_free_entry(struct rcu_head *entry)
65{
66 struct netlbl_dom_map *ptr;
67 struct netlbl_af4list *iter4;
68 struct netlbl_af4list *tmp4;
69#if IS_ENABLED(CONFIG_IPV6)
70 struct netlbl_af6list *iter6;
71 struct netlbl_af6list *tmp6;
72#endif
73
74 ptr = container_of(entry, struct netlbl_dom_map, rcu);
75 if (ptr->def.type == NETLBL_NLTYPE_ADDRSELECT) {
76 netlbl_af4list_foreach_safe(iter4, tmp4,
77 &ptr->def.addrsel->list4) {
78 netlbl_af4list_remove_entry(iter4);
79 kfree(netlbl_domhsh_addr4_entry(iter4));
80 }
81#if IS_ENABLED(CONFIG_IPV6)
82 netlbl_af6list_foreach_safe(iter6, tmp6,
83 &ptr->def.addrsel->list6) {
84 netlbl_af6list_remove_entry(iter6);
85 kfree(netlbl_domhsh_addr6_entry(iter6));
86 }
87#endif
88 kfree(ptr->def.addrsel);
89 }
90 kfree(ptr->domain);
91 kfree(ptr);
92}
93
94
95
96
97
98
99
100
101
102
103
104
105static u32 netlbl_domhsh_hash(const char *key)
106{
107 u32 iter;
108 u32 val;
109 u32 len;
110
111
112
113
114 for (iter = 0, val = 0, len = strlen(key); iter < len; iter++)
115 val = (val << 4 | (val >> (8 * sizeof(u32) - 4))) ^ key[iter];
116 return val & (netlbl_domhsh_rcu_deref(netlbl_domhsh)->size - 1);
117}
118
119static bool netlbl_family_match(u16 f1, u16 f2)
120{
121 return (f1 == f2) || (f1 == AF_UNSPEC) || (f2 == AF_UNSPEC);
122}
123
124
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135
136
137static struct netlbl_dom_map *netlbl_domhsh_search(const char *domain,
138 u16 family)
139{
140 u32 bkt;
141 struct list_head *bkt_list;
142 struct netlbl_dom_map *iter;
143
144 if (domain != NULL) {
145 bkt = netlbl_domhsh_hash(domain);
146 bkt_list = &netlbl_domhsh_rcu_deref(netlbl_domhsh)->tbl[bkt];
147 list_for_each_entry_rcu(iter, bkt_list, list,
148 lockdep_is_held(&netlbl_domhsh_lock))
149 if (iter->valid &&
150 netlbl_family_match(iter->family, family) &&
151 strcmp(iter->domain, domain) == 0)
152 return iter;
153 }
154
155 return NULL;
156}
157
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171
172static struct netlbl_dom_map *netlbl_domhsh_search_def(const char *domain,
173 u16 family)
174{
175 struct netlbl_dom_map *entry;
176
177 entry = netlbl_domhsh_search(domain, family);
178 if (entry != NULL)
179 return entry;
180 if (family == AF_INET || family == AF_UNSPEC) {
181 entry = netlbl_domhsh_rcu_deref(netlbl_domhsh_def_ipv4);
182 if (entry != NULL && entry->valid)
183 return entry;
184 }
185 if (family == AF_INET6 || family == AF_UNSPEC) {
186 entry = netlbl_domhsh_rcu_deref(netlbl_domhsh_def_ipv6);
187 if (entry != NULL && entry->valid)
188 return entry;
189 }
190
191 return NULL;
192}
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207
208static void netlbl_domhsh_audit_add(struct netlbl_dom_map *entry,
209 struct netlbl_af4list *addr4,
210 struct netlbl_af6list *addr6,
211 int result,
212 struct netlbl_audit *audit_info)
213{
214 struct audit_buffer *audit_buf;
215 struct cipso_v4_doi *cipsov4 = NULL;
216 struct calipso_doi *calipso = NULL;
217 u32 type;
218
219 audit_buf = netlbl_audit_start_common(AUDIT_MAC_MAP_ADD, audit_info);
220 if (audit_buf != NULL) {
221 audit_log_format(audit_buf, " nlbl_domain=%s",
222 entry->domain ? entry->domain : "(default)");
223 if (addr4 != NULL) {
224 struct netlbl_domaddr4_map *map4;
225 map4 = netlbl_domhsh_addr4_entry(addr4);
226 type = map4->def.type;
227 cipsov4 = map4->def.cipso;
228 netlbl_af4list_audit_addr(audit_buf, 0, NULL,
229 addr4->addr, addr4->mask);
230#if IS_ENABLED(CONFIG_IPV6)
231 } else if (addr6 != NULL) {
232 struct netlbl_domaddr6_map *map6;
233 map6 = netlbl_domhsh_addr6_entry(addr6);
234 type = map6->def.type;
235 calipso = map6->def.calipso;
236 netlbl_af6list_audit_addr(audit_buf, 0, NULL,
237 &addr6->addr, &addr6->mask);
238#endif
239 } else {
240 type = entry->def.type;
241 cipsov4 = entry->def.cipso;
242 calipso = entry->def.calipso;
243 }
244 switch (type) {
245 case NETLBL_NLTYPE_UNLABELED:
246 audit_log_format(audit_buf, " nlbl_protocol=unlbl");
247 break;
248 case NETLBL_NLTYPE_CIPSOV4:
249 BUG_ON(cipsov4 == NULL);
250 audit_log_format(audit_buf,
251 " nlbl_protocol=cipsov4 cipso_doi=%u",
252 cipsov4->doi);
253 break;
254 case NETLBL_NLTYPE_CALIPSO:
255 BUG_ON(calipso == NULL);
256 audit_log_format(audit_buf,
257 " nlbl_protocol=calipso calipso_doi=%u",
258 calipso->doi);
259 break;
260 }
261 audit_log_format(audit_buf, " res=%u", result == 0 ? 1 : 0);
262 audit_log_end(audit_buf);
263 }
264}
265
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268
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270
271
272
273
274static int netlbl_domhsh_validate(const struct netlbl_dom_map *entry)
275{
276 struct netlbl_af4list *iter4;
277 struct netlbl_domaddr4_map *map4;
278#if IS_ENABLED(CONFIG_IPV6)
279 struct netlbl_af6list *iter6;
280 struct netlbl_domaddr6_map *map6;
281#endif
282
283 if (entry == NULL)
284 return -EINVAL;
285
286 if (entry->family != AF_INET && entry->family != AF_INET6 &&
287 (entry->family != AF_UNSPEC ||
288 entry->def.type != NETLBL_NLTYPE_UNLABELED))
289 return -EINVAL;
290
291 switch (entry->def.type) {
292 case NETLBL_NLTYPE_UNLABELED:
293 if (entry->def.cipso != NULL || entry->def.calipso != NULL ||
294 entry->def.addrsel != NULL)
295 return -EINVAL;
296 break;
297 case NETLBL_NLTYPE_CIPSOV4:
298 if (entry->family != AF_INET ||
299 entry->def.cipso == NULL)
300 return -EINVAL;
301 break;
302 case NETLBL_NLTYPE_CALIPSO:
303 if (entry->family != AF_INET6 ||
304 entry->def.calipso == NULL)
305 return -EINVAL;
306 break;
307 case NETLBL_NLTYPE_ADDRSELECT:
308 netlbl_af4list_foreach(iter4, &entry->def.addrsel->list4) {
309 map4 = netlbl_domhsh_addr4_entry(iter4);
310 switch (map4->def.type) {
311 case NETLBL_NLTYPE_UNLABELED:
312 if (map4->def.cipso != NULL)
313 return -EINVAL;
314 break;
315 case NETLBL_NLTYPE_CIPSOV4:
316 if (map4->def.cipso == NULL)
317 return -EINVAL;
318 break;
319 default:
320 return -EINVAL;
321 }
322 }
323#if IS_ENABLED(CONFIG_IPV6)
324 netlbl_af6list_foreach(iter6, &entry->def.addrsel->list6) {
325 map6 = netlbl_domhsh_addr6_entry(iter6);
326 switch (map6->def.type) {
327 case NETLBL_NLTYPE_UNLABELED:
328 if (map6->def.calipso != NULL)
329 return -EINVAL;
330 break;
331 case NETLBL_NLTYPE_CALIPSO:
332 if (map6->def.calipso == NULL)
333 return -EINVAL;
334 break;
335 default:
336 return -EINVAL;
337 }
338 }
339#endif
340 break;
341 default:
342 return -EINVAL;
343 }
344
345 return 0;
346}
347
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359
360
361
362int __init netlbl_domhsh_init(u32 size)
363{
364 u32 iter;
365 struct netlbl_domhsh_tbl *hsh_tbl;
366
367 if (size == 0)
368 return -EINVAL;
369
370 hsh_tbl = kmalloc(sizeof(*hsh_tbl), GFP_KERNEL);
371 if (hsh_tbl == NULL)
372 return -ENOMEM;
373 hsh_tbl->size = 1 << size;
374 hsh_tbl->tbl = kcalloc(hsh_tbl->size,
375 sizeof(struct list_head),
376 GFP_KERNEL);
377 if (hsh_tbl->tbl == NULL) {
378 kfree(hsh_tbl);
379 return -ENOMEM;
380 }
381 for (iter = 0; iter < hsh_tbl->size; iter++)
382 INIT_LIST_HEAD(&hsh_tbl->tbl[iter]);
383
384 spin_lock(&netlbl_domhsh_lock);
385 rcu_assign_pointer(netlbl_domhsh, hsh_tbl);
386 spin_unlock(&netlbl_domhsh_lock);
387
388 return 0;
389}
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402
403
404
405int netlbl_domhsh_add(struct netlbl_dom_map *entry,
406 struct netlbl_audit *audit_info)
407{
408 int ret_val = 0;
409 struct netlbl_dom_map *entry_old, *entry_b;
410 struct netlbl_af4list *iter4;
411 struct netlbl_af4list *tmp4;
412#if IS_ENABLED(CONFIG_IPV6)
413 struct netlbl_af6list *iter6;
414 struct netlbl_af6list *tmp6;
415#endif
416
417 ret_val = netlbl_domhsh_validate(entry);
418 if (ret_val != 0)
419 return ret_val;
420
421
422
423
424
425 rcu_read_lock();
426 spin_lock(&netlbl_domhsh_lock);
427 if (entry->domain != NULL)
428 entry_old = netlbl_domhsh_search(entry->domain, entry->family);
429 else
430 entry_old = netlbl_domhsh_search_def(entry->domain,
431 entry->family);
432 if (entry_old == NULL) {
433 entry->valid = 1;
434
435 if (entry->domain != NULL) {
436 u32 bkt = netlbl_domhsh_hash(entry->domain);
437 list_add_tail_rcu(&entry->list,
438 &rcu_dereference(netlbl_domhsh)->tbl[bkt]);
439 } else {
440 INIT_LIST_HEAD(&entry->list);
441 switch (entry->family) {
442 case AF_INET:
443 rcu_assign_pointer(netlbl_domhsh_def_ipv4,
444 entry);
445 break;
446 case AF_INET6:
447 rcu_assign_pointer(netlbl_domhsh_def_ipv6,
448 entry);
449 break;
450 case AF_UNSPEC:
451 if (entry->def.type !=
452 NETLBL_NLTYPE_UNLABELED) {
453 ret_val = -EINVAL;
454 goto add_return;
455 }
456 entry_b = kzalloc(sizeof(*entry_b), GFP_ATOMIC);
457 if (entry_b == NULL) {
458 ret_val = -ENOMEM;
459 goto add_return;
460 }
461 entry_b->family = AF_INET6;
462 entry_b->def.type = NETLBL_NLTYPE_UNLABELED;
463 entry_b->valid = 1;
464 entry->family = AF_INET;
465 rcu_assign_pointer(netlbl_domhsh_def_ipv4,
466 entry);
467 rcu_assign_pointer(netlbl_domhsh_def_ipv6,
468 entry_b);
469 break;
470 default:
471
472
473 ret_val = -EINVAL;
474 goto add_return;
475 }
476 }
477
478 if (entry->def.type == NETLBL_NLTYPE_ADDRSELECT) {
479 netlbl_af4list_foreach_rcu(iter4,
480 &entry->def.addrsel->list4)
481 netlbl_domhsh_audit_add(entry, iter4, NULL,
482 ret_val, audit_info);
483#if IS_ENABLED(CONFIG_IPV6)
484 netlbl_af6list_foreach_rcu(iter6,
485 &entry->def.addrsel->list6)
486 netlbl_domhsh_audit_add(entry, NULL, iter6,
487 ret_val, audit_info);
488#endif
489 } else
490 netlbl_domhsh_audit_add(entry, NULL, NULL,
491 ret_val, audit_info);
492 } else if (entry_old->def.type == NETLBL_NLTYPE_ADDRSELECT &&
493 entry->def.type == NETLBL_NLTYPE_ADDRSELECT) {
494 struct list_head *old_list4;
495 struct list_head *old_list6;
496
497 old_list4 = &entry_old->def.addrsel->list4;
498 old_list6 = &entry_old->def.addrsel->list6;
499
500
501
502 netlbl_af4list_foreach_rcu(iter4, &entry->def.addrsel->list4)
503 if (netlbl_af4list_search_exact(iter4->addr,
504 iter4->mask,
505 old_list4)) {
506 ret_val = -EEXIST;
507 goto add_return;
508 }
509#if IS_ENABLED(CONFIG_IPV6)
510 netlbl_af6list_foreach_rcu(iter6, &entry->def.addrsel->list6)
511 if (netlbl_af6list_search_exact(&iter6->addr,
512 &iter6->mask,
513 old_list6)) {
514 ret_val = -EEXIST;
515 goto add_return;
516 }
517#endif
518
519 netlbl_af4list_foreach_safe(iter4, tmp4,
520 &entry->def.addrsel->list4) {
521 netlbl_af4list_remove_entry(iter4);
522 iter4->valid = 1;
523 ret_val = netlbl_af4list_add(iter4, old_list4);
524 netlbl_domhsh_audit_add(entry_old, iter4, NULL,
525 ret_val, audit_info);
526 if (ret_val != 0)
527 goto add_return;
528 }
529#if IS_ENABLED(CONFIG_IPV6)
530 netlbl_af6list_foreach_safe(iter6, tmp6,
531 &entry->def.addrsel->list6) {
532 netlbl_af6list_remove_entry(iter6);
533 iter6->valid = 1;
534 ret_val = netlbl_af6list_add(iter6, old_list6);
535 netlbl_domhsh_audit_add(entry_old, NULL, iter6,
536 ret_val, audit_info);
537 if (ret_val != 0)
538 goto add_return;
539 }
540#endif
541
542 netlbl_domhsh_free_entry(&entry->rcu);
543 } else
544 ret_val = -EINVAL;
545
546add_return:
547 spin_unlock(&netlbl_domhsh_lock);
548 rcu_read_unlock();
549 return ret_val;
550}
551
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559
560
561
562
563int netlbl_domhsh_add_default(struct netlbl_dom_map *entry,
564 struct netlbl_audit *audit_info)
565{
566 return netlbl_domhsh_add(entry, audit_info);
567}
568
569
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575
576
577
578
579
580
581int netlbl_domhsh_remove_entry(struct netlbl_dom_map *entry,
582 struct netlbl_audit *audit_info)
583{
584 int ret_val = 0;
585 struct audit_buffer *audit_buf;
586 struct netlbl_af4list *iter4;
587 struct netlbl_domaddr4_map *map4;
588#if IS_ENABLED(CONFIG_IPV6)
589 struct netlbl_af6list *iter6;
590 struct netlbl_domaddr6_map *map6;
591#endif
592
593 if (entry == NULL)
594 return -ENOENT;
595
596 spin_lock(&netlbl_domhsh_lock);
597 if (entry->valid) {
598 entry->valid = 0;
599 if (entry == rcu_dereference(netlbl_domhsh_def_ipv4))
600 RCU_INIT_POINTER(netlbl_domhsh_def_ipv4, NULL);
601 else if (entry == rcu_dereference(netlbl_domhsh_def_ipv6))
602 RCU_INIT_POINTER(netlbl_domhsh_def_ipv6, NULL);
603 else
604 list_del_rcu(&entry->list);
605 } else
606 ret_val = -ENOENT;
607 spin_unlock(&netlbl_domhsh_lock);
608
609 if (ret_val)
610 return ret_val;
611
612 audit_buf = netlbl_audit_start_common(AUDIT_MAC_MAP_DEL, audit_info);
613 if (audit_buf != NULL) {
614 audit_log_format(audit_buf,
615 " nlbl_domain=%s res=%u",
616 entry->domain ? entry->domain : "(default)",
617 ret_val == 0 ? 1 : 0);
618 audit_log_end(audit_buf);
619 }
620
621 switch (entry->def.type) {
622 case NETLBL_NLTYPE_ADDRSELECT:
623 netlbl_af4list_foreach_rcu(iter4, &entry->def.addrsel->list4) {
624 map4 = netlbl_domhsh_addr4_entry(iter4);
625 cipso_v4_doi_putdef(map4->def.cipso);
626 }
627#if IS_ENABLED(CONFIG_IPV6)
628 netlbl_af6list_foreach_rcu(iter6, &entry->def.addrsel->list6) {
629 map6 = netlbl_domhsh_addr6_entry(iter6);
630 calipso_doi_putdef(map6->def.calipso);
631 }
632#endif
633 break;
634 case NETLBL_NLTYPE_CIPSOV4:
635 cipso_v4_doi_putdef(entry->def.cipso);
636 break;
637#if IS_ENABLED(CONFIG_IPV6)
638 case NETLBL_NLTYPE_CALIPSO:
639 calipso_doi_putdef(entry->def.calipso);
640 break;
641#endif
642 }
643 call_rcu(&entry->rcu, netlbl_domhsh_free_entry);
644
645 return ret_val;
646}
647
648
649
650
651
652
653
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655
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657
658
659
660
661int netlbl_domhsh_remove_af4(const char *domain,
662 const struct in_addr *addr,
663 const struct in_addr *mask,
664 struct netlbl_audit *audit_info)
665{
666 struct netlbl_dom_map *entry_map;
667 struct netlbl_af4list *entry_addr;
668 struct netlbl_af4list *iter4;
669#if IS_ENABLED(CONFIG_IPV6)
670 struct netlbl_af6list *iter6;
671#endif
672 struct netlbl_domaddr4_map *entry;
673
674 rcu_read_lock();
675
676 if (domain)
677 entry_map = netlbl_domhsh_search(domain, AF_INET);
678 else
679 entry_map = netlbl_domhsh_search_def(domain, AF_INET);
680 if (entry_map == NULL ||
681 entry_map->def.type != NETLBL_NLTYPE_ADDRSELECT)
682 goto remove_af4_failure;
683
684 spin_lock(&netlbl_domhsh_lock);
685 entry_addr = netlbl_af4list_remove(addr->s_addr, mask->s_addr,
686 &entry_map->def.addrsel->list4);
687 spin_unlock(&netlbl_domhsh_lock);
688
689 if (entry_addr == NULL)
690 goto remove_af4_failure;
691 netlbl_af4list_foreach_rcu(iter4, &entry_map->def.addrsel->list4)
692 goto remove_af4_single_addr;
693#if IS_ENABLED(CONFIG_IPV6)
694 netlbl_af6list_foreach_rcu(iter6, &entry_map->def.addrsel->list6)
695 goto remove_af4_single_addr;
696#endif
697
698 netlbl_domhsh_remove_entry(entry_map, audit_info);
699
700remove_af4_single_addr:
701 rcu_read_unlock();
702
703
704
705 synchronize_rcu();
706 entry = netlbl_domhsh_addr4_entry(entry_addr);
707 cipso_v4_doi_putdef(entry->def.cipso);
708 kfree(entry);
709 return 0;
710
711remove_af4_failure:
712 rcu_read_unlock();
713 return -ENOENT;
714}
715
716#if IS_ENABLED(CONFIG_IPV6)
717
718
719
720
721
722
723
724
725
726
727
728
729
730int netlbl_domhsh_remove_af6(const char *domain,
731 const struct in6_addr *addr,
732 const struct in6_addr *mask,
733 struct netlbl_audit *audit_info)
734{
735 struct netlbl_dom_map *entry_map;
736 struct netlbl_af6list *entry_addr;
737 struct netlbl_af4list *iter4;
738 struct netlbl_af6list *iter6;
739 struct netlbl_domaddr6_map *entry;
740
741 rcu_read_lock();
742
743 if (domain)
744 entry_map = netlbl_domhsh_search(domain, AF_INET6);
745 else
746 entry_map = netlbl_domhsh_search_def(domain, AF_INET6);
747 if (entry_map == NULL ||
748 entry_map->def.type != NETLBL_NLTYPE_ADDRSELECT)
749 goto remove_af6_failure;
750
751 spin_lock(&netlbl_domhsh_lock);
752 entry_addr = netlbl_af6list_remove(addr, mask,
753 &entry_map->def.addrsel->list6);
754 spin_unlock(&netlbl_domhsh_lock);
755
756 if (entry_addr == NULL)
757 goto remove_af6_failure;
758 netlbl_af4list_foreach_rcu(iter4, &entry_map->def.addrsel->list4)
759 goto remove_af6_single_addr;
760 netlbl_af6list_foreach_rcu(iter6, &entry_map->def.addrsel->list6)
761 goto remove_af6_single_addr;
762
763 netlbl_domhsh_remove_entry(entry_map, audit_info);
764
765remove_af6_single_addr:
766 rcu_read_unlock();
767
768
769
770 synchronize_rcu();
771 entry = netlbl_domhsh_addr6_entry(entry_addr);
772 calipso_doi_putdef(entry->def.calipso);
773 kfree(entry);
774 return 0;
775
776remove_af6_failure:
777 rcu_read_unlock();
778 return -ENOENT;
779}
780#endif
781
782
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784
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787
788
789
790
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793
794
795int netlbl_domhsh_remove(const char *domain, u16 family,
796 struct netlbl_audit *audit_info)
797{
798 int ret_val = -EINVAL;
799 struct netlbl_dom_map *entry;
800
801 rcu_read_lock();
802
803 if (family == AF_INET || family == AF_UNSPEC) {
804 if (domain)
805 entry = netlbl_domhsh_search(domain, AF_INET);
806 else
807 entry = netlbl_domhsh_search_def(domain, AF_INET);
808 ret_val = netlbl_domhsh_remove_entry(entry, audit_info);
809 if (ret_val && ret_val != -ENOENT)
810 goto done;
811 }
812 if (family == AF_INET6 || family == AF_UNSPEC) {
813 int ret_val2;
814
815 if (domain)
816 entry = netlbl_domhsh_search(domain, AF_INET6);
817 else
818 entry = netlbl_domhsh_search_def(domain, AF_INET6);
819 ret_val2 = netlbl_domhsh_remove_entry(entry, audit_info);
820 if (ret_val2 != -ENOENT)
821 ret_val = ret_val2;
822 }
823done:
824 rcu_read_unlock();
825
826 return ret_val;
827}
828
829
830
831
832
833
834
835
836
837
838
839
840
841int netlbl_domhsh_remove_default(u16 family, struct netlbl_audit *audit_info)
842{
843 return netlbl_domhsh_remove(NULL, family, audit_info);
844}
845
846
847
848
849
850
851
852
853
854
855
856
857
858struct netlbl_dom_map *netlbl_domhsh_getentry(const char *domain, u16 family)
859{
860 if (family == AF_UNSPEC)
861 return NULL;
862 return netlbl_domhsh_search_def(domain, family);
863}
864
865
866
867
868
869
870
871
872
873
874
875
876struct netlbl_dommap_def *netlbl_domhsh_getentry_af4(const char *domain,
877 __be32 addr)
878{
879 struct netlbl_dom_map *dom_iter;
880 struct netlbl_af4list *addr_iter;
881
882 dom_iter = netlbl_domhsh_search_def(domain, AF_INET);
883 if (dom_iter == NULL)
884 return NULL;
885
886 if (dom_iter->def.type != NETLBL_NLTYPE_ADDRSELECT)
887 return &dom_iter->def;
888 addr_iter = netlbl_af4list_search(addr, &dom_iter->def.addrsel->list4);
889 if (addr_iter == NULL)
890 return NULL;
891 return &(netlbl_domhsh_addr4_entry(addr_iter)->def);
892}
893
894#if IS_ENABLED(CONFIG_IPV6)
895
896
897
898
899
900
901
902
903
904
905
906struct netlbl_dommap_def *netlbl_domhsh_getentry_af6(const char *domain,
907 const struct in6_addr *addr)
908{
909 struct netlbl_dom_map *dom_iter;
910 struct netlbl_af6list *addr_iter;
911
912 dom_iter = netlbl_domhsh_search_def(domain, AF_INET6);
913 if (dom_iter == NULL)
914 return NULL;
915
916 if (dom_iter->def.type != NETLBL_NLTYPE_ADDRSELECT)
917 return &dom_iter->def;
918 addr_iter = netlbl_af6list_search(addr, &dom_iter->def.addrsel->list6);
919 if (addr_iter == NULL)
920 return NULL;
921 return &(netlbl_domhsh_addr6_entry(addr_iter)->def);
922}
923#endif
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940int netlbl_domhsh_walk(u32 *skip_bkt,
941 u32 *skip_chain,
942 int (*callback) (struct netlbl_dom_map *entry, void *arg),
943 void *cb_arg)
944{
945 int ret_val = -ENOENT;
946 u32 iter_bkt;
947 struct list_head *iter_list;
948 struct netlbl_dom_map *iter_entry;
949 u32 chain_cnt = 0;
950
951 rcu_read_lock();
952 for (iter_bkt = *skip_bkt;
953 iter_bkt < rcu_dereference(netlbl_domhsh)->size;
954 iter_bkt++, chain_cnt = 0) {
955 iter_list = &rcu_dereference(netlbl_domhsh)->tbl[iter_bkt];
956 list_for_each_entry_rcu(iter_entry, iter_list, list)
957 if (iter_entry->valid) {
958 if (chain_cnt++ < *skip_chain)
959 continue;
960 ret_val = callback(iter_entry, cb_arg);
961 if (ret_val < 0) {
962 chain_cnt--;
963 goto walk_return;
964 }
965 }
966 }
967
968walk_return:
969 rcu_read_unlock();
970 *skip_bkt = iter_bkt;
971 *skip_chain = chain_cnt;
972 return ret_val;
973}
974