1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* 3 * NetLabel Domain Hash Table 4 * 5 * This file manages the domain hash table that NetLabel uses to determine 6 * which network labeling protocol to use for a given domain. The NetLabel 7 * system manages static and dynamic label mappings for network protocols such 8 * as CIPSO and RIPSO. 9 * 10 * Author: Paul Moore <paul@paul-moore.com> 11 */ 12 13 /* 14 * (c) Copyright Hewlett-Packard Development Company, L.P., 2006, 2008 15 */ 16 17 #ifndef _NETLABEL_DOMAINHASH_H 18 #define _NETLABEL_DOMAINHASH_H 19 20 #include <linux/types.h> 21 #include <linux/rcupdate.h> 22 #include <linux/list.h> 23 24 #include "netlabel_addrlist.h" 25 26 /* Domain hash table size */ 27 /* XXX - currently this number is an uneducated guess */ 28 #define NETLBL_DOMHSH_BITSIZE 7 29 30 /* Domain mapping definition structures */ 31 struct netlbl_domaddr_map { 32 struct list_head list4; 33 struct list_head list6; 34 }; 35 struct netlbl_dommap_def { 36 u32 type; 37 union { 38 struct netlbl_domaddr_map *addrsel; 39 struct cipso_v4_doi *cipso; 40 struct calipso_doi *calipso; 41 }; 42 }; 43 #define netlbl_domhsh_addr4_entry(iter) \ 44 container_of(iter, struct netlbl_domaddr4_map, list) 45 struct netlbl_domaddr4_map { 46 struct netlbl_dommap_def def; 47 48 struct netlbl_af4list list; 49 }; 50 #define netlbl_domhsh_addr6_entry(iter) \ 51 container_of(iter, struct netlbl_domaddr6_map, list) 52 struct netlbl_domaddr6_map { 53 struct netlbl_dommap_def def; 54 55 struct netlbl_af6list list; 56 }; 57 58 struct netlbl_dom_map { 59 char *domain; 60 u16 family; 61 struct netlbl_dommap_def def; 62 63 u32 valid; 64 struct list_head list; 65 struct rcu_head rcu; 66 }; 67 68 /* init function */ 69 int netlbl_domhsh_init(u32 size); 70 71 /* Manipulate the domain hash table */ 72 int netlbl_domhsh_add(struct netlbl_dom_map *entry, 73 struct netlbl_audit *audit_info); 74 int netlbl_domhsh_add_default(struct netlbl_dom_map *entry, 75 struct netlbl_audit *audit_info); 76 int netlbl_domhsh_remove_entry(struct netlbl_dom_map *entry, 77 struct netlbl_audit *audit_info); 78 int netlbl_domhsh_remove_af4(const char *domain, 79 const struct in_addr *addr, 80 const struct in_addr *mask, 81 struct netlbl_audit *audit_info); 82 int netlbl_domhsh_remove_af6(const char *domain, 83 const struct in6_addr *addr, 84 const struct in6_addr *mask, 85 struct netlbl_audit *audit_info); 86 int netlbl_domhsh_remove(const char *domain, u16 family, 87 struct netlbl_audit *audit_info); 88 int netlbl_domhsh_remove_default(u16 family, struct netlbl_audit *audit_info); 89 struct netlbl_dom_map *netlbl_domhsh_getentry(const char *domain, u16 family); 90 struct netlbl_dommap_def *netlbl_domhsh_getentry_af4(const char *domain, 91 __be32 addr); 92 #if IS_ENABLED(CONFIG_IPV6) 93 struct netlbl_dommap_def *netlbl_domhsh_getentry_af6(const char *domain, 94 const struct in6_addr *addr); 95 int netlbl_domhsh_remove_af6(const char *domain, 96 const struct in6_addr *addr, 97 const struct in6_addr *mask, 98 struct netlbl_audit *audit_info); 99 #endif /* IPv6 */ 100 101 int netlbl_domhsh_walk(u32 *skip_bkt, 102 u32 *skip_chain, 103 int (*callback) (struct netlbl_dom_map *entry, void *arg), 104 void *cb_arg); 105 106 #endif 107