1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Copyright IBM Corp. 2007 4 * Author(s): Utz Bacher <utz.bacher@de.ibm.com>, 5 * Frank Pavlic <fpavlic@de.ibm.com>, 6 * Thomas Spatzier <tspat@de.ibm.com>, 7 * Frank Blaschka <frank.blaschka@de.ibm.com> 8 */ 9 10 #ifndef __QETH_L3_H__ 11 #define __QETH_L3_H__ 12 13 #include "qeth_core.h" 14 #include <linux/hashtable.h> 15 16 enum qeth_ip_types { 17 QETH_IP_TYPE_NORMAL, 18 QETH_IP_TYPE_VIPA, 19 QETH_IP_TYPE_RXIP, 20 }; 21 22 struct qeth_ipaddr { 23 struct hlist_node hnode; 24 enum qeth_ip_types type; 25 u8 is_multicast:1; 26 u8 disp_flag:2; 27 u8 ipato:1; /* ucast only */ 28 29 /* is changed only for normal ip addresses 30 * for non-normal addresses it always is 1 31 */ 32 int ref_counter; 33 enum qeth_prot_versions proto; 34 union { 35 struct { 36 __be32 addr; 37 __be32 mask; 38 } a4; 39 struct { 40 struct in6_addr addr; 41 unsigned int pfxlen; 42 } a6; 43 } u; 44 }; 45 46 static inline void qeth_l3_init_ipaddr(struct qeth_ipaddr *addr, 47 enum qeth_ip_types type, 48 enum qeth_prot_versions proto) 49 { 50 memset(addr, 0, sizeof(*addr)); 51 addr->type = type; 52 addr->proto = proto; 53 addr->disp_flag = QETH_DISP_ADDR_DO_NOTHING; 54 addr->ref_counter = 1; 55 } 56 57 static inline bool qeth_l3_addr_match_ip(struct qeth_ipaddr *a1, 58 struct qeth_ipaddr *a2) 59 { 60 if (a1->proto != a2->proto) 61 return false; 62 if (a1->proto == QETH_PROT_IPV6) 63 return ipv6_addr_equal(&a1->u.a6.addr, &a2->u.a6.addr); 64 return a1->u.a4.addr == a2->u.a4.addr; 65 } 66 67 static inline bool qeth_l3_addr_match_all(struct qeth_ipaddr *a1, 68 struct qeth_ipaddr *a2) 69 { 70 /* Assumes that the pair was obtained via qeth_l3_addr_find_by_ip(), 71 * so 'proto' and 'addr' match for sure. 72 * 73 * For ucast: 74 * - 'mask'/'pfxlen' for RXIP/VIPA is always 0. For NORMAL, matching 75 * values are required to avoid mixups in takeover eligibility. 76 * 77 * For mcast, 78 * - 'mask'/'pfxlen' is always 0. 79 */ 80 if (a1->type != a2->type) 81 return false; 82 if (a1->proto == QETH_PROT_IPV6) 83 return a1->u.a6.pfxlen == a2->u.a6.pfxlen; 84 return a1->u.a4.mask == a2->u.a4.mask; 85 } 86 87 static inline u32 qeth_l3_ipaddr_hash(struct qeth_ipaddr *addr) 88 { 89 if (addr->proto == QETH_PROT_IPV6) 90 return ipv6_addr_hash(&addr->u.a6.addr); 91 else 92 return ipv4_addr_hash(addr->u.a4.addr); 93 } 94 95 struct qeth_ipato_entry { 96 struct list_head entry; 97 enum qeth_prot_versions proto; 98 char addr[16]; 99 unsigned int mask_bits; 100 }; 101 102 extern const struct attribute_group *qeth_l3_attr_groups[]; 103 104 int qeth_l3_ipaddr_to_string(enum qeth_prot_versions proto, const u8 *addr, 105 char *buf); 106 int qeth_l3_setrouting_v4(struct qeth_card *); 107 int qeth_l3_setrouting_v6(struct qeth_card *); 108 int qeth_l3_add_ipato_entry(struct qeth_card *, struct qeth_ipato_entry *); 109 int qeth_l3_del_ipato_entry(struct qeth_card *card, 110 enum qeth_prot_versions proto, u8 *addr, 111 unsigned int mask_bits); 112 void qeth_l3_update_ipato(struct qeth_card *card); 113 int qeth_l3_modify_hsuid(struct qeth_card *card, bool add); 114 int qeth_l3_modify_rxip_vipa(struct qeth_card *card, bool add, const u8 *ip, 115 enum qeth_ip_types type, 116 enum qeth_prot_versions proto); 117 118 #endif /* __QETH_L3_H__ */ 119