1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Copyright IBM Corp. 2007
4*4882a593Smuzhiyun * Author(s): Utz Bacher <utz.bacher@de.ibm.com>,
5*4882a593Smuzhiyun * Frank Pavlic <fpavlic@de.ibm.com>,
6*4882a593Smuzhiyun * Thomas Spatzier <tspat@de.ibm.com>,
7*4882a593Smuzhiyun * Frank Blaschka <frank.blaschka@de.ibm.com>
8*4882a593Smuzhiyun */
9*4882a593Smuzhiyun
10*4882a593Smuzhiyun #ifndef __QETH_L3_H__
11*4882a593Smuzhiyun #define __QETH_L3_H__
12*4882a593Smuzhiyun
13*4882a593Smuzhiyun #include "qeth_core.h"
14*4882a593Smuzhiyun #include <linux/hashtable.h>
15*4882a593Smuzhiyun
16*4882a593Smuzhiyun enum qeth_ip_types {
17*4882a593Smuzhiyun QETH_IP_TYPE_NORMAL,
18*4882a593Smuzhiyun QETH_IP_TYPE_VIPA,
19*4882a593Smuzhiyun QETH_IP_TYPE_RXIP,
20*4882a593Smuzhiyun };
21*4882a593Smuzhiyun
22*4882a593Smuzhiyun struct qeth_ipaddr {
23*4882a593Smuzhiyun struct hlist_node hnode;
24*4882a593Smuzhiyun enum qeth_ip_types type;
25*4882a593Smuzhiyun u8 is_multicast:1;
26*4882a593Smuzhiyun u8 disp_flag:2;
27*4882a593Smuzhiyun u8 ipato:1; /* ucast only */
28*4882a593Smuzhiyun
29*4882a593Smuzhiyun /* is changed only for normal ip addresses
30*4882a593Smuzhiyun * for non-normal addresses it always is 1
31*4882a593Smuzhiyun */
32*4882a593Smuzhiyun int ref_counter;
33*4882a593Smuzhiyun enum qeth_prot_versions proto;
34*4882a593Smuzhiyun union {
35*4882a593Smuzhiyun struct {
36*4882a593Smuzhiyun __be32 addr;
37*4882a593Smuzhiyun __be32 mask;
38*4882a593Smuzhiyun } a4;
39*4882a593Smuzhiyun struct {
40*4882a593Smuzhiyun struct in6_addr addr;
41*4882a593Smuzhiyun unsigned int pfxlen;
42*4882a593Smuzhiyun } a6;
43*4882a593Smuzhiyun } u;
44*4882a593Smuzhiyun };
45*4882a593Smuzhiyun
qeth_l3_init_ipaddr(struct qeth_ipaddr * addr,enum qeth_ip_types type,enum qeth_prot_versions proto)46*4882a593Smuzhiyun static inline void qeth_l3_init_ipaddr(struct qeth_ipaddr *addr,
47*4882a593Smuzhiyun enum qeth_ip_types type,
48*4882a593Smuzhiyun enum qeth_prot_versions proto)
49*4882a593Smuzhiyun {
50*4882a593Smuzhiyun memset(addr, 0, sizeof(*addr));
51*4882a593Smuzhiyun addr->type = type;
52*4882a593Smuzhiyun addr->proto = proto;
53*4882a593Smuzhiyun addr->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
54*4882a593Smuzhiyun addr->ref_counter = 1;
55*4882a593Smuzhiyun }
56*4882a593Smuzhiyun
qeth_l3_addr_match_ip(struct qeth_ipaddr * a1,struct qeth_ipaddr * a2)57*4882a593Smuzhiyun static inline bool qeth_l3_addr_match_ip(struct qeth_ipaddr *a1,
58*4882a593Smuzhiyun struct qeth_ipaddr *a2)
59*4882a593Smuzhiyun {
60*4882a593Smuzhiyun if (a1->proto != a2->proto)
61*4882a593Smuzhiyun return false;
62*4882a593Smuzhiyun if (a1->proto == QETH_PROT_IPV6)
63*4882a593Smuzhiyun return ipv6_addr_equal(&a1->u.a6.addr, &a2->u.a6.addr);
64*4882a593Smuzhiyun return a1->u.a4.addr == a2->u.a4.addr;
65*4882a593Smuzhiyun }
66*4882a593Smuzhiyun
qeth_l3_addr_match_all(struct qeth_ipaddr * a1,struct qeth_ipaddr * a2)67*4882a593Smuzhiyun static inline bool qeth_l3_addr_match_all(struct qeth_ipaddr *a1,
68*4882a593Smuzhiyun struct qeth_ipaddr *a2)
69*4882a593Smuzhiyun {
70*4882a593Smuzhiyun /* Assumes that the pair was obtained via qeth_l3_addr_find_by_ip(),
71*4882a593Smuzhiyun * so 'proto' and 'addr' match for sure.
72*4882a593Smuzhiyun *
73*4882a593Smuzhiyun * For ucast:
74*4882a593Smuzhiyun * - 'mask'/'pfxlen' for RXIP/VIPA is always 0. For NORMAL, matching
75*4882a593Smuzhiyun * values are required to avoid mixups in takeover eligibility.
76*4882a593Smuzhiyun *
77*4882a593Smuzhiyun * For mcast,
78*4882a593Smuzhiyun * - 'mask'/'pfxlen' is always 0.
79*4882a593Smuzhiyun */
80*4882a593Smuzhiyun if (a1->type != a2->type)
81*4882a593Smuzhiyun return false;
82*4882a593Smuzhiyun if (a1->proto == QETH_PROT_IPV6)
83*4882a593Smuzhiyun return a1->u.a6.pfxlen == a2->u.a6.pfxlen;
84*4882a593Smuzhiyun return a1->u.a4.mask == a2->u.a4.mask;
85*4882a593Smuzhiyun }
86*4882a593Smuzhiyun
qeth_l3_ipaddr_hash(struct qeth_ipaddr * addr)87*4882a593Smuzhiyun static inline u32 qeth_l3_ipaddr_hash(struct qeth_ipaddr *addr)
88*4882a593Smuzhiyun {
89*4882a593Smuzhiyun if (addr->proto == QETH_PROT_IPV6)
90*4882a593Smuzhiyun return ipv6_addr_hash(&addr->u.a6.addr);
91*4882a593Smuzhiyun else
92*4882a593Smuzhiyun return ipv4_addr_hash(addr->u.a4.addr);
93*4882a593Smuzhiyun }
94*4882a593Smuzhiyun
95*4882a593Smuzhiyun struct qeth_ipato_entry {
96*4882a593Smuzhiyun struct list_head entry;
97*4882a593Smuzhiyun enum qeth_prot_versions proto;
98*4882a593Smuzhiyun char addr[16];
99*4882a593Smuzhiyun unsigned int mask_bits;
100*4882a593Smuzhiyun };
101*4882a593Smuzhiyun
102*4882a593Smuzhiyun extern const struct attribute_group *qeth_l3_attr_groups[];
103*4882a593Smuzhiyun
104*4882a593Smuzhiyun int qeth_l3_ipaddr_to_string(enum qeth_prot_versions proto, const u8 *addr,
105*4882a593Smuzhiyun char *buf);
106*4882a593Smuzhiyun int qeth_l3_create_device_attributes(struct device *);
107*4882a593Smuzhiyun void qeth_l3_remove_device_attributes(struct device *);
108*4882a593Smuzhiyun int qeth_l3_setrouting_v4(struct qeth_card *);
109*4882a593Smuzhiyun int qeth_l3_setrouting_v6(struct qeth_card *);
110*4882a593Smuzhiyun int qeth_l3_add_ipato_entry(struct qeth_card *, struct qeth_ipato_entry *);
111*4882a593Smuzhiyun int qeth_l3_del_ipato_entry(struct qeth_card *card,
112*4882a593Smuzhiyun enum qeth_prot_versions proto, u8 *addr,
113*4882a593Smuzhiyun unsigned int mask_bits);
114*4882a593Smuzhiyun void qeth_l3_update_ipato(struct qeth_card *card);
115*4882a593Smuzhiyun int qeth_l3_modify_hsuid(struct qeth_card *card, bool add);
116*4882a593Smuzhiyun int qeth_l3_modify_rxip_vipa(struct qeth_card *card, bool add, const u8 *ip,
117*4882a593Smuzhiyun enum qeth_ip_types type,
118*4882a593Smuzhiyun enum qeth_prot_versions proto);
119*4882a593Smuzhiyun
120*4882a593Smuzhiyun #endif /* __QETH_L3_H__ */
121