cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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qeth_l3.h (3102B)

      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__ */