1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/*
3 * Copyright (c) 2015 Tom Herbert <tom@herbertland.com>
4 */
5
6#ifndef __ILA_H
7#define __ILA_H
8
9#include <linux/errno.h>
10#include <linux/ip.h>
11#include <linux/kernel.h>
12#include <linux/module.h>
13#include <linux/socket.h>
14#include <linux/skbuff.h>
15#include <linux/types.h>
16#include <net/checksum.h>
17#include <net/genetlink.h>
18#include <net/ip.h>
19#include <net/protocol.h>
20#include <uapi/linux/ila.h>
21
22struct ila_locator {
23	union {
24		__u8            v8[8];
25		__be16          v16[4];
26		__be32          v32[2];
27		__be64		v64;
28	};
29};
30
31struct ila_identifier {
32	union {
33		struct {
34#if defined(__LITTLE_ENDIAN_BITFIELD)
35			u8 __space:4;
36			u8 csum_neutral:1;
37			u8 type:3;
38#elif defined(__BIG_ENDIAN_BITFIELD)
39			u8 type:3;
40			u8 csum_neutral:1;
41			u8 __space:4;
42#else
43#error  "Adjust your <asm/byteorder.h> defines"
44#endif
45			u8 __space2[7];
46		};
47		__u8            v8[8];
48		__be16          v16[4];
49		__be32          v32[2];
50		__be64		v64;
51	};
52};
53
54#define CSUM_NEUTRAL_FLAG	htonl(0x10000000)
55
56struct ila_addr {
57	union {
58		struct in6_addr addr;
59		struct {
60			struct ila_locator loc;
61			struct ila_identifier ident;
62		};
63	};
64};
65
66static inline struct ila_addr *ila_a2i(struct in6_addr *addr)
67{
68	return (struct ila_addr *)addr;
69}
70
71struct ila_params {
72	struct ila_locator locator;
73	struct ila_locator locator_match;
74	__wsum csum_diff;
75	u8 csum_mode;
76	u8 ident_type;
77};
78
79static inline __wsum compute_csum_diff8(const __be32 *from, const __be32 *to)
80{
81	__be32 diff[] = {
82		~from[0], ~from[1], to[0], to[1],
83	};
84
85	return csum_partial(diff, sizeof(diff), 0);
86}
87
88static inline bool ila_csum_neutral_set(struct ila_identifier ident)
89{
90	return !!(ident.csum_neutral);
91}
92
93void ila_update_ipv6_locator(struct sk_buff *skb, struct ila_params *p,
94			     bool set_csum_neutral);
95
96void ila_init_saved_csum(struct ila_params *p);
97
98struct ila_net {
99	struct {
100		struct rhashtable rhash_table;
101		spinlock_t *locks; /* Bucket locks for entry manipulation */
102		unsigned int locks_mask;
103		bool hooks_registered;
104	} xlat;
105};
106
107int ila_lwt_init(void);
108void ila_lwt_fini(void);
109
110int ila_xlat_init_net(struct net *net);
111void ila_xlat_exit_net(struct net *net);
112
113int ila_xlat_nl_cmd_add_mapping(struct sk_buff *skb, struct genl_info *info);
114int ila_xlat_nl_cmd_del_mapping(struct sk_buff *skb, struct genl_info *info);
115int ila_xlat_nl_cmd_get_mapping(struct sk_buff *skb, struct genl_info *info);
116int ila_xlat_nl_cmd_flush(struct sk_buff *skb, struct genl_info *info);
117int ila_xlat_nl_dump_start(struct netlink_callback *cb);
118int ila_xlat_nl_dump_done(struct netlink_callback *cb);
119int ila_xlat_nl_dump(struct sk_buff *skb, struct netlink_callback *cb);
120
121extern unsigned int ila_net_id;
122
123extern struct genl_family ila_nl_family;
124
125#endif /* __ILA_H */
126