xref: /openbmc/linux/drivers/s390/net/qeth_l3.h (revision 0b8da811)
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