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
16enum qeth_ip_types {
17 QETH_IP_TYPE_NORMAL,
18 QETH_IP_TYPE_VIPA,
19 QETH_IP_TYPE_RXIP,
20};
21
22struct 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
46static 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
57static 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: &a1->u.a6.addr, a2: &a2->u.a6.addr);
64 return a1->u.a4.addr == a2->u.a4.addr;
65}
66
67static 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
87static inline u32 qeth_l3_ipaddr_hash(struct qeth_ipaddr *addr)
88{
89 if (addr->proto == QETH_PROT_IPV6)
90 return ipv6_addr_hash(a: &addr->u.a6.addr);
91 else
92 return ipv4_addr_hash(ip: addr->u.a4.addr);
93}
94
95struct 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
102extern const struct attribute_group *qeth_l3_attr_groups[];
103
104int qeth_l3_ipaddr_to_string(enum qeth_prot_versions proto, const u8 *addr,
105 char *buf);
106int qeth_l3_setrouting_v4(struct qeth_card *);
107int qeth_l3_setrouting_v6(struct qeth_card *);
108int qeth_l3_add_ipato_entry(struct qeth_card *, struct qeth_ipato_entry *);
109int qeth_l3_del_ipato_entry(struct qeth_card *card,
110 enum qeth_prot_versions proto, u8 *addr,
111 unsigned int mask_bits);
112void qeth_l3_update_ipato(struct qeth_card *card);
113int qeth_l3_modify_hsuid(struct qeth_card *card, bool add);
114int 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

source code of linux/drivers/s390/net/qeth_l3.h