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 in_progress:1; 27 u8 disp_flag:2; 28 u8 ipato:1; /* ucast only */ 29 30 /* is changed only for normal ip addresses 31 * for non-normal addresses it always is 1 32 */ 33 int ref_counter; 34 enum qeth_prot_versions proto; 35 union { 36 struct { 37 __be32 addr; 38 unsigned int mask; 39 } a4; 40 struct { 41 struct in6_addr addr; 42 unsigned int pfxlen; 43 } a6; 44 } u; 45 }; 46 47 static inline void qeth_l3_init_ipaddr(struct qeth_ipaddr *addr, 48 enum qeth_ip_types type, 49 enum qeth_prot_versions proto) 50 { 51 memset(addr, 0, sizeof(*addr)); 52 addr->type = type; 53 addr->proto = proto; 54 addr->disp_flag = QETH_DISP_ADDR_DO_NOTHING; 55 addr->ref_counter = 1; 56 } 57 58 static inline bool qeth_l3_addr_match_ip(struct qeth_ipaddr *a1, 59 struct qeth_ipaddr *a2) 60 { 61 if (a1->proto != a2->proto) 62 return false; 63 if (a1->proto == QETH_PROT_IPV6) 64 return ipv6_addr_equal(&a1->u.a6.addr, &a2->u.a6.addr); 65 return a1->u.a4.addr == a2->u.a4.addr; 66 } 67 68 static inline bool qeth_l3_addr_match_all(struct qeth_ipaddr *a1, 69 struct qeth_ipaddr *a2) 70 { 71 /* Assumes that the pair was obtained via qeth_l3_addr_find_by_ip(), 72 * so 'proto' and 'addr' match for sure. 73 * 74 * For ucast: 75 * - 'mask'/'pfxlen' for RXIP/VIPA is always 0. For NORMAL, matching 76 * values are required to avoid mixups in takeover eligibility. 77 * 78 * For mcast, 79 * - 'mask'/'pfxlen' is always 0. 80 */ 81 if (a1->type != a2->type) 82 return false; 83 if (a1->proto == QETH_PROT_IPV6) 84 return a1->u.a6.pfxlen == a2->u.a6.pfxlen; 85 return a1->u.a4.mask == a2->u.a4.mask; 86 } 87 88 static inline u32 qeth_l3_ipaddr_hash(struct qeth_ipaddr *addr) 89 { 90 if (addr->proto == QETH_PROT_IPV6) 91 return ipv6_addr_hash(&addr->u.a6.addr); 92 else 93 return ipv4_addr_hash(addr->u.a4.addr); 94 } 95 96 struct qeth_ipato_entry { 97 struct list_head entry; 98 enum qeth_prot_versions proto; 99 char addr[16]; 100 int mask_bits; 101 }; 102 103 extern const struct attribute_group *qeth_l3_attr_groups[]; 104 105 void qeth_l3_ipaddr_to_string(enum qeth_prot_versions, const __u8 *, char *); 106 int qeth_l3_create_device_attributes(struct device *); 107 void qeth_l3_remove_device_attributes(struct device *); 108 int qeth_l3_setrouting_v4(struct qeth_card *); 109 int qeth_l3_setrouting_v6(struct qeth_card *); 110 int qeth_l3_add_ipato_entry(struct qeth_card *, struct qeth_ipato_entry *); 111 int qeth_l3_del_ipato_entry(struct qeth_card *card, 112 enum qeth_prot_versions proto, u8 *addr, 113 int mask_bits); 114 void qeth_l3_update_ipato(struct qeth_card *card); 115 int qeth_l3_modify_hsuid(struct qeth_card *card, bool add); 116 int qeth_l3_modify_rxip_vipa(struct qeth_card *card, bool add, const u8 *ip, 117 enum qeth_ip_types type, 118 enum qeth_prot_versions proto); 119 120 #endif /* __QETH_L3_H__ */ 121