diff options
Diffstat (limited to 'drivers/s390/net/qeth_l3.h')
| -rw-r--r-- | drivers/s390/net/qeth_l3.h | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/drivers/s390/net/qeth_l3.h b/drivers/s390/net/qeth_l3.h new file mode 100644 index 0000000000..30c2b31d99 --- /dev/null +++ b/drivers/s390/net/qeth_l3.h @@ -0,0 +1,118 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright IBM Corp. 2007 + * Author(s): Utz Bacher <utz.bacher@de.ibm.com>, + * Frank Pavlic <fpavlic@de.ibm.com>, + * Thomas Spatzier <tspat@de.ibm.com>, + * Frank Blaschka <frank.blaschka@de.ibm.com> + */ + +#ifndef __QETH_L3_H__ +#define __QETH_L3_H__ + +#include "qeth_core.h" +#include <linux/hashtable.h> + +enum qeth_ip_types { + QETH_IP_TYPE_NORMAL, + QETH_IP_TYPE_VIPA, + QETH_IP_TYPE_RXIP, +}; + +struct qeth_ipaddr { + struct hlist_node hnode; + enum qeth_ip_types type; + u8 is_multicast:1; + u8 disp_flag:2; + u8 ipato:1; /* ucast only */ + + /* is changed only for normal ip addresses + * for non-normal addresses it always is 1 + */ + int ref_counter; + enum qeth_prot_versions proto; + union { + struct { + __be32 addr; + __be32 mask; + } a4; + struct { + struct in6_addr addr; + unsigned int pfxlen; + } a6; + } u; +}; + +static inline void qeth_l3_init_ipaddr(struct qeth_ipaddr *addr, + enum qeth_ip_types type, + enum qeth_prot_versions proto) +{ + memset(addr, 0, sizeof(*addr)); + addr->type = type; + addr->proto = proto; + addr->disp_flag = QETH_DISP_ADDR_DO_NOTHING; + addr->ref_counter = 1; +} + +static inline bool qeth_l3_addr_match_ip(struct qeth_ipaddr *a1, + struct qeth_ipaddr *a2) +{ + if (a1->proto != a2->proto) + return false; + if (a1->proto == QETH_PROT_IPV6) + return ipv6_addr_equal(&a1->u.a6.addr, &a2->u.a6.addr); + return a1->u.a4.addr == a2->u.a4.addr; +} + +static inline bool qeth_l3_addr_match_all(struct qeth_ipaddr *a1, + struct qeth_ipaddr *a2) +{ + /* Assumes that the pair was obtained via qeth_l3_addr_find_by_ip(), + * so 'proto' and 'addr' match for sure. + * + * For ucast: + * - 'mask'/'pfxlen' for RXIP/VIPA is always 0. For NORMAL, matching + * values are required to avoid mixups in takeover eligibility. + * + * For mcast, + * - 'mask'/'pfxlen' is always 0. + */ + if (a1->type != a2->type) + return false; + if (a1->proto == QETH_PROT_IPV6) + return a1->u.a6.pfxlen == a2->u.a6.pfxlen; + return a1->u.a4.mask == a2->u.a4.mask; +} + +static inline u32 qeth_l3_ipaddr_hash(struct qeth_ipaddr *addr) +{ + if (addr->proto == QETH_PROT_IPV6) + return ipv6_addr_hash(&addr->u.a6.addr); + else + return ipv4_addr_hash(addr->u.a4.addr); +} + +struct qeth_ipato_entry { + struct list_head entry; + enum qeth_prot_versions proto; + char addr[16]; + unsigned int mask_bits; +}; + +extern const struct attribute_group *qeth_l3_attr_groups[]; + +int qeth_l3_ipaddr_to_string(enum qeth_prot_versions proto, const u8 *addr, + char *buf); +int qeth_l3_setrouting_v4(struct qeth_card *); +int qeth_l3_setrouting_v6(struct qeth_card *); +int qeth_l3_add_ipato_entry(struct qeth_card *, struct qeth_ipato_entry *); +int qeth_l3_del_ipato_entry(struct qeth_card *card, + enum qeth_prot_versions proto, u8 *addr, + unsigned int mask_bits); +void qeth_l3_update_ipato(struct qeth_card *card); +int qeth_l3_modify_hsuid(struct qeth_card *card, bool add); +int qeth_l3_modify_rxip_vipa(struct qeth_card *card, bool add, const u8 *ip, + enum qeth_ip_types type, + enum qeth_prot_versions proto); + +#endif /* __QETH_L3_H__ */ |