qeth_l3.h

  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
 16enum qeth_ip_types {
 17	QETH_IP_TYPE_NORMAL,
 18	QETH_IP_TYPE_VIPA,
 19	QETH_IP_TYPE_RXIP,
 20};
 21
 22struct 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
 46static 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
 57static 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
 67static 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
 87static 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
 95struct 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
102extern const struct attribute_group *qeth_l3_attr_groups[];
103
104int qeth_l3_ipaddr_to_string(enum qeth_prot_versions proto, const u8 *addr,
105			     char *buf);
106int qeth_l3_setrouting_v4(struct qeth_card *);
107int qeth_l3_setrouting_v6(struct qeth_card *);
108int qeth_l3_add_ipato_entry(struct qeth_card *, struct qeth_ipato_entry *);
109int qeth_l3_del_ipato_entry(struct qeth_card *card,
110			    enum qeth_prot_versions proto, u8 *addr,
111			    unsigned int mask_bits);
112void qeth_l3_update_ipato(struct qeth_card *card);
113int qeth_l3_modify_hsuid(struct qeth_card *card, bool add);
114int 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__ */