Loading...
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_pre_exit_net(struct net *net);
112void ila_xlat_exit_net(struct net *net);
113
114int ila_xlat_nl_cmd_add_mapping(struct sk_buff *skb, struct genl_info *info);
115int ila_xlat_nl_cmd_del_mapping(struct sk_buff *skb, struct genl_info *info);
116int ila_xlat_nl_cmd_get_mapping(struct sk_buff *skb, struct genl_info *info);
117int ila_xlat_nl_cmd_flush(struct sk_buff *skb, struct genl_info *info);
118int ila_xlat_nl_dump_start(struct netlink_callback *cb);
119int ila_xlat_nl_dump_done(struct netlink_callback *cb);
120int ila_xlat_nl_dump(struct sk_buff *skb, struct netlink_callback *cb);
121
122extern unsigned int ila_net_id;
123
124extern struct genl_family ila_nl_family;
125
126#endif /* __ILA_H */
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 */