/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright IBM Corp. 2007
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* Author(s): Utz Bacher <utz.bacher@de.ibm.com>,
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* Frank Pavlic <fpavlic@de.ibm.com>,
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* Thomas Spatzier <tspat@de.ibm.com>,
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* Frank Blaschka <frank.blaschka@de.ibm.com>
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*/
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#ifndef __QETH_L3_H__
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#define __QETH_L3_H__
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#include "qeth_core.h"
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#include <linux/hashtable.h>
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enum qeth_ip_types {
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QETH_IP_TYPE_NORMAL,
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QETH_IP_TYPE_VIPA,
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QETH_IP_TYPE_RXIP,
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};
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struct qeth_ipaddr {
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struct hlist_node hnode;
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enum qeth_ip_types type;
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u8 is_multicast:1;
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u8 disp_flag:2;
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u8 ipato:1; /* ucast only */
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/* is changed only for normal ip addresses
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* for non-normal addresses it always is 1
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*/
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int ref_counter;
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enum qeth_prot_versions proto;
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union {
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struct {
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__be32 addr;
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__be32 mask;
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} a4;
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struct {
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struct in6_addr addr;
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unsigned int pfxlen;
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} a6;
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} u;
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};
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static inline void qeth_l3_init_ipaddr(struct qeth_ipaddr *addr,
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enum qeth_ip_types type,
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enum qeth_prot_versions proto)
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{
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memset(addr, 0, sizeof(*addr));
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addr->type = type;
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addr->proto = proto;
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addr->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
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addr->ref_counter = 1;
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}
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static inline bool qeth_l3_addr_match_ip(struct qeth_ipaddr *a1,
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struct qeth_ipaddr *a2)
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{
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if (a1->proto != a2->proto)
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return false;
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if (a1->proto == QETH_PROT_IPV6)
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return ipv6_addr_equal(&a1->u.a6.addr, &a2->u.a6.addr);
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return a1->u.a4.addr == a2->u.a4.addr;
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}
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static inline bool qeth_l3_addr_match_all(struct qeth_ipaddr *a1,
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struct qeth_ipaddr *a2)
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{
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/* Assumes that the pair was obtained via qeth_l3_addr_find_by_ip(),
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* so 'proto' and 'addr' match for sure.
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*
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* For ucast:
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* - 'mask'/'pfxlen' for RXIP/VIPA is always 0. For NORMAL, matching
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* values are required to avoid mixups in takeover eligibility.
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*
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* For mcast,
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* - 'mask'/'pfxlen' is always 0.
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*/
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if (a1->type != a2->type)
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return false;
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if (a1->proto == QETH_PROT_IPV6)
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return a1->u.a6.pfxlen == a2->u.a6.pfxlen;
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return a1->u.a4.mask == a2->u.a4.mask;
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}
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static inline u32 qeth_l3_ipaddr_hash(struct qeth_ipaddr *addr)
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{
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if (addr->proto == QETH_PROT_IPV6)
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return ipv6_addr_hash(&addr->u.a6.addr);
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else
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return ipv4_addr_hash(addr->u.a4.addr);
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}
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struct qeth_ipato_entry {
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struct list_head entry;
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enum qeth_prot_versions proto;
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char addr[16];
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unsigned int mask_bits;
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};
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extern const struct attribute_group *qeth_l3_attr_groups[];
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int qeth_l3_ipaddr_to_string(enum qeth_prot_versions proto, const u8 *addr,
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char *buf);
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int qeth_l3_create_device_attributes(struct device *);
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void qeth_l3_remove_device_attributes(struct device *);
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int qeth_l3_setrouting_v4(struct qeth_card *);
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int qeth_l3_setrouting_v6(struct qeth_card *);
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int qeth_l3_add_ipato_entry(struct qeth_card *, struct qeth_ipato_entry *);
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int qeth_l3_del_ipato_entry(struct qeth_card *card,
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enum qeth_prot_versions proto, u8 *addr,
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unsigned int mask_bits);
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void qeth_l3_update_ipato(struct qeth_card *card);
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int qeth_l3_modify_hsuid(struct qeth_card *card, bool add);
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int qeth_l3_modify_rxip_vipa(struct qeth_card *card, bool add, const u8 *ip,
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enum qeth_ip_types type,
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enum qeth_prot_versions proto);
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#endif /* __QETH_L3_H__ */
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