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
qeth_l3_init_ipaddr(struct qeth_ipaddr * addr,enum qeth_ip_types type,enum qeth_prot_versions proto)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
qeth_l3_addr_match_ip(struct qeth_ipaddr * a1,struct qeth_ipaddr * a2)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
qeth_l3_addr_match_all(struct qeth_ipaddr * a1,struct qeth_ipaddr * a2)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
qeth_l3_ipaddr_hash(struct qeth_ipaddr * addr)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