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->u.a6.addr, &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(&addr->u.a6.addr);
91	else
92		return ipv4_addr_hash(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