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