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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 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
47static 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
58static 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
68static 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
88static 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
96struct qeth_ipato_entry {
97 struct list_head entry;
98 enum qeth_prot_versions proto;
99 char addr[16];
100 int mask_bits;
101};
102
103extern const struct attribute_group *qeth_l3_attr_groups[];
104
105void qeth_l3_ipaddr_to_string(enum qeth_prot_versions, const __u8 *, char *);
106int qeth_l3_create_device_attributes(struct device *);
107void qeth_l3_remove_device_attributes(struct device *);
108int qeth_l3_setrouting_v4(struct qeth_card *);
109int qeth_l3_setrouting_v6(struct qeth_card *);
110int qeth_l3_add_ipato_entry(struct qeth_card *, struct qeth_ipato_entry *);
111int qeth_l3_del_ipato_entry(struct qeth_card *card,
112 enum qeth_prot_versions proto, u8 *addr,
113 int mask_bits);
114void qeth_l3_update_ipato(struct qeth_card *card);
115int qeth_l3_modify_hsuid(struct qeth_card *card, bool add);
116int 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__ */