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 #define QETH_SNIFF_AVAIL 0x0008
17
18 enum qeth_ip_types {
19 QETH_IP_TYPE_NORMAL,
20 QETH_IP_TYPE_VIPA,
21 QETH_IP_TYPE_RXIP,
22 };
23
24 struct qeth_ipaddr {
25 struct hlist_node hnode;
26 enum qeth_ip_types type;
27 unsigned char mac[ETH_ALEN];
28 u8 is_multicast:1;
29 u8 in_progress:1;
30 u8 disp_flag:2;
31 u8 ipato:1; /* ucast only */
32
33 /* is changed only for normal ip addresses
34 * for non-normal addresses it always is 1
35 */
36 int ref_counter;
37 enum qeth_prot_versions proto;
38 union {
39 struct {
40 unsigned int addr;
41 unsigned int mask;
42 } a4;
43 struct {
44 struct in6_addr addr;
45 unsigned int pfxlen;
46 } a6;
47 } u;
48 };
49
qeth_l3_init_ipaddr(struct qeth_ipaddr * addr,enum qeth_ip_types type,enum qeth_prot_versions proto)50 static inline void qeth_l3_init_ipaddr(struct qeth_ipaddr *addr,
51 enum qeth_ip_types type,
52 enum qeth_prot_versions proto)
53 {
54 memset(addr, 0, sizeof(*addr));
55 addr->type = type;
56 addr->proto = proto;
57 addr->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
58 }
59
qeth_l3_addr_match_ip(struct qeth_ipaddr * a1,struct qeth_ipaddr * a2)60 static inline bool qeth_l3_addr_match_ip(struct qeth_ipaddr *a1,
61 struct qeth_ipaddr *a2)
62 {
63 if (a1->proto != a2->proto)
64 return false;
65 if (a1->proto == QETH_PROT_IPV6)
66 return ipv6_addr_equal(&a1->u.a6.addr, &a2->u.a6.addr);
67 return a1->u.a4.addr == a2->u.a4.addr;
68 }
69
qeth_l3_addr_match_all(struct qeth_ipaddr * a1,struct qeth_ipaddr * a2)70 static inline bool qeth_l3_addr_match_all(struct qeth_ipaddr *a1,
71 struct qeth_ipaddr *a2)
72 {
73 /* Assumes that the pair was obtained via qeth_l3_addr_find_by_ip(),
74 * so 'proto' and 'addr' match for sure.
75 *
76 * For ucast:
77 * - 'mac' is always 0.
78 * - 'mask'/'pfxlen' for RXIP/VIPA is always 0. For NORMAL, matching
79 * values are required to avoid mixups in takeover eligibility.
80 *
81 * For mcast,
82 * - 'mac' is mapped from the IP, and thus always matches.
83 * - 'mask'/'pfxlen' is always 0.
84 */
85 if (a1->type != a2->type)
86 return false;
87 if (a1->proto == QETH_PROT_IPV6)
88 return a1->u.a6.pfxlen == a2->u.a6.pfxlen;
89 return a1->u.a4.mask == a2->u.a4.mask;
90 }
91
qeth_l3_ipaddr_hash(struct qeth_ipaddr * addr)92 static inline u64 qeth_l3_ipaddr_hash(struct qeth_ipaddr *addr)
93 {
94 u64 ret = 0;
95 u8 *point;
96
97 if (addr->proto == QETH_PROT_IPV6) {
98 point = (u8 *) &addr->u.a6.addr;
99 ret = get_unaligned((u64 *)point) ^
100 get_unaligned((u64 *) (point + 8));
101 }
102 if (addr->proto == QETH_PROT_IPV4) {
103 point = (u8 *) &addr->u.a4.addr;
104 ret = get_unaligned((u32 *) point);
105 }
106 return ret;
107 }
108
109 struct qeth_ipato_entry {
110 struct list_head entry;
111 enum qeth_prot_versions proto;
112 char addr[16];
113 int mask_bits;
114 };
115
116 extern const struct attribute_group *qeth_l3_attr_groups[];
117
118 void qeth_l3_ipaddr_to_string(enum qeth_prot_versions, const __u8 *, char *);
119 int qeth_l3_create_device_attributes(struct device *);
120 void qeth_l3_remove_device_attributes(struct device *);
121 int qeth_l3_setrouting_v4(struct qeth_card *);
122 int qeth_l3_setrouting_v6(struct qeth_card *);
123 int qeth_l3_add_ipato_entry(struct qeth_card *, struct qeth_ipato_entry *);
124 int qeth_l3_del_ipato_entry(struct qeth_card *card,
125 enum qeth_prot_versions proto, u8 *addr,
126 int mask_bits);
127 void qeth_l3_update_ipato(struct qeth_card *card);
128 int qeth_l3_modify_hsuid(struct qeth_card *card, bool add);
129 int qeth_l3_modify_rxip_vipa(struct qeth_card *card, bool add, const u8 *ip,
130 enum qeth_ip_types type,
131 enum qeth_prot_versions proto);
132
133 #endif /* __QETH_L3_H__ */
134