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33f11d16 TH |
1 | /* |
2 | * Copyright (c) 2015 Tom Herbert <tom@herbertland.com> | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public License as | |
6 | * published by the Free Software Foundation; either version 2 of | |
7 | * the License, or (at your option) any later version. | |
8 | * | |
9 | */ | |
10 | ||
11 | #ifndef __ILA_H | |
12 | #define __ILA_H | |
13 | ||
14 | #include <linux/errno.h> | |
15 | #include <linux/ip.h> | |
16 | #include <linux/kernel.h> | |
17 | #include <linux/module.h> | |
18 | #include <linux/socket.h> | |
19 | #include <linux/skbuff.h> | |
20 | #include <linux/types.h> | |
21 | #include <net/checksum.h> | |
22 | #include <net/ip.h> | |
23 | #include <net/protocol.h> | |
24 | #include <uapi/linux/ila.h> | |
25 | ||
351596aa TH |
26 | struct ila_locator { |
27 | union { | |
28 | __u8 v8[8]; | |
29 | __be16 v16[4]; | |
30 | __be32 v32[2]; | |
31 | __be64 v64; | |
32 | }; | |
33 | }; | |
34 | ||
35 | struct ila_identifier { | |
36 | union { | |
37 | struct { | |
38 | #if defined(__LITTLE_ENDIAN_BITFIELD) | |
90bfe662 TH |
39 | u8 __space:4; |
40 | u8 csum_neutral:1; | |
351596aa TH |
41 | u8 type:3; |
42 | #elif defined(__BIG_ENDIAN_BITFIELD) | |
43 | u8 type:3; | |
90bfe662 TH |
44 | u8 csum_neutral:1; |
45 | u8 __space:4; | |
351596aa TH |
46 | #else |
47 | #error "Adjust your <asm/byteorder.h> defines" | |
48 | #endif | |
49 | u8 __space2[7]; | |
50 | }; | |
51 | __u8 v8[8]; | |
52 | __be16 v16[4]; | |
53 | __be32 v32[2]; | |
54 | __be64 v64; | |
55 | }; | |
56 | }; | |
57 | ||
58 | enum { | |
59 | ILA_ATYPE_IID = 0, | |
60 | ILA_ATYPE_LUID, | |
61 | ILA_ATYPE_VIRT_V4, | |
62 | ILA_ATYPE_VIRT_UNI_V6, | |
63 | ILA_ATYPE_VIRT_MULTI_V6, | |
64 | ILA_ATYPE_RSVD_1, | |
65 | ILA_ATYPE_RSVD_2, | |
66 | ILA_ATYPE_RSVD_3, | |
67 | }; | |
68 | ||
90bfe662 TH |
69 | #define CSUM_NEUTRAL_FLAG htonl(0x10000000) |
70 | ||
351596aa TH |
71 | struct ila_addr { |
72 | union { | |
73 | struct in6_addr addr; | |
74 | struct { | |
75 | struct ila_locator loc; | |
76 | struct ila_identifier ident; | |
77 | }; | |
78 | }; | |
79 | }; | |
80 | ||
81 | static inline struct ila_addr *ila_a2i(struct in6_addr *addr) | |
82 | { | |
83 | return (struct ila_addr *)addr; | |
84 | } | |
85 | ||
86 | static inline bool ila_addr_is_ila(struct ila_addr *iaddr) | |
87 | { | |
88 | return (iaddr->ident.type != ILA_ATYPE_IID); | |
89 | } | |
90 | ||
33f11d16 | 91 | struct ila_params { |
351596aa TH |
92 | struct ila_locator locator; |
93 | struct ila_locator locator_match; | |
33f11d16 | 94 | __wsum csum_diff; |
90bfe662 | 95 | u8 csum_mode; |
33f11d16 TH |
96 | }; |
97 | ||
98 | static inline __wsum compute_csum_diff8(const __be32 *from, const __be32 *to) | |
99 | { | |
100 | __be32 diff[] = { | |
101 | ~from[0], ~from[1], to[0], to[1], | |
102 | }; | |
103 | ||
104 | return csum_partial(diff, sizeof(diff), 0); | |
105 | } | |
106 | ||
90bfe662 TH |
107 | static inline bool ila_csum_neutral_set(struct ila_identifier ident) |
108 | { | |
109 | return !!(ident.csum_neutral); | |
110 | } | |
111 | ||
707a2ca4 TH |
112 | void ila_update_ipv6_locator(struct sk_buff *skb, struct ila_params *p, |
113 | bool set_csum_neutral); | |
33f11d16 | 114 | |
90bfe662 TH |
115 | void ila_init_saved_csum(struct ila_params *p); |
116 | ||
33f11d16 TH |
117 | int ila_lwt_init(void); |
118 | void ila_lwt_fini(void); | |
7f00feaf TH |
119 | int ila_xlat_init(void); |
120 | void ila_xlat_fini(void); | |
33f11d16 TH |
121 | |
122 | #endif /* __ILA_H */ |