1 /* SPDX-License-Identifier: GPL-2.0-or-later * <<
2 /* 1 /*
3 * Copyright (c) 2015 Tom Herbert <tom@herbert 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 *
4 */ 9 */
5 10
6 #ifndef __ILA_H 11 #ifndef __ILA_H
7 #define __ILA_H 12 #define __ILA_H
8 13
9 #include <linux/errno.h> 14 #include <linux/errno.h>
10 #include <linux/ip.h> 15 #include <linux/ip.h>
11 #include <linux/kernel.h> 16 #include <linux/kernel.h>
12 #include <linux/module.h> 17 #include <linux/module.h>
13 #include <linux/socket.h> 18 #include <linux/socket.h>
14 #include <linux/skbuff.h> 19 #include <linux/skbuff.h>
15 #include <linux/types.h> 20 #include <linux/types.h>
16 #include <net/checksum.h> 21 #include <net/checksum.h>
17 #include <net/genetlink.h> 22 #include <net/genetlink.h>
18 #include <net/ip.h> 23 #include <net/ip.h>
19 #include <net/protocol.h> 24 #include <net/protocol.h>
20 #include <uapi/linux/ila.h> 25 #include <uapi/linux/ila.h>
21 26
22 struct ila_locator { 27 struct ila_locator {
23 union { 28 union {
24 __u8 v8[8]; 29 __u8 v8[8];
25 __be16 v16[4]; 30 __be16 v16[4];
26 __be32 v32[2]; 31 __be32 v32[2];
27 __be64 v64; 32 __be64 v64;
28 }; 33 };
29 }; 34 };
30 35
31 struct ila_identifier { 36 struct ila_identifier {
32 union { 37 union {
33 struct { 38 struct {
34 #if defined(__LITTLE_ENDIAN_BITFIELD) 39 #if defined(__LITTLE_ENDIAN_BITFIELD)
35 u8 __space:4; 40 u8 __space:4;
36 u8 csum_neutral:1; 41 u8 csum_neutral:1;
37 u8 type:3; 42 u8 type:3;
38 #elif defined(__BIG_ENDIAN_BITFIELD) 43 #elif defined(__BIG_ENDIAN_BITFIELD)
39 u8 type:3; 44 u8 type:3;
40 u8 csum_neutral:1; 45 u8 csum_neutral:1;
41 u8 __space:4; 46 u8 __space:4;
42 #else 47 #else
43 #error "Adjust your <asm/byteorder.h> defines 48 #error "Adjust your <asm/byteorder.h> defines"
44 #endif 49 #endif
45 u8 __space2[7]; 50 u8 __space2[7];
46 }; 51 };
47 __u8 v8[8]; 52 __u8 v8[8];
48 __be16 v16[4]; 53 __be16 v16[4];
49 __be32 v32[2]; 54 __be32 v32[2];
50 __be64 v64; 55 __be64 v64;
51 }; 56 };
52 }; 57 };
53 58
54 #define CSUM_NEUTRAL_FLAG htonl(0x100000 59 #define CSUM_NEUTRAL_FLAG htonl(0x10000000)
55 60
56 struct ila_addr { 61 struct ila_addr {
57 union { 62 union {
58 struct in6_addr addr; 63 struct in6_addr addr;
59 struct { 64 struct {
60 struct ila_locator loc 65 struct ila_locator loc;
61 struct ila_identifier 66 struct ila_identifier ident;
62 }; 67 };
63 }; 68 };
64 }; 69 };
65 70
66 static inline struct ila_addr *ila_a2i(struct 71 static inline struct ila_addr *ila_a2i(struct in6_addr *addr)
67 { 72 {
68 return (struct ila_addr *)addr; 73 return (struct ila_addr *)addr;
69 } 74 }
70 75
>> 76 static inline bool ila_addr_is_ila(struct ila_addr *iaddr)
>> 77 {
>> 78 return (iaddr->ident.type != ILA_ATYPE_IID);
>> 79 }
>> 80
71 struct ila_params { 81 struct ila_params {
72 struct ila_locator locator; 82 struct ila_locator locator;
73 struct ila_locator locator_match; 83 struct ila_locator locator_match;
74 __wsum csum_diff; 84 __wsum csum_diff;
75 u8 csum_mode; 85 u8 csum_mode;
76 u8 ident_type; 86 u8 ident_type;
77 }; 87 };
78 88
79 static inline __wsum compute_csum_diff8(const 89 static inline __wsum compute_csum_diff8(const __be32 *from, const __be32 *to)
80 { 90 {
81 __be32 diff[] = { 91 __be32 diff[] = {
82 ~from[0], ~from[1], to[0], to[ 92 ~from[0], ~from[1], to[0], to[1],
83 }; 93 };
84 94
85 return csum_partial(diff, sizeof(diff) 95 return csum_partial(diff, sizeof(diff), 0);
86 } 96 }
87 97
88 static inline bool ila_csum_neutral_set(struct 98 static inline bool ila_csum_neutral_set(struct ila_identifier ident)
89 { 99 {
90 return !!(ident.csum_neutral); 100 return !!(ident.csum_neutral);
91 } 101 }
92 102
93 void ila_update_ipv6_locator(struct sk_buff *s 103 void ila_update_ipv6_locator(struct sk_buff *skb, struct ila_params *p,
94 bool set_csum_neu 104 bool set_csum_neutral);
95 105
96 void ila_init_saved_csum(struct ila_params *p) 106 void ila_init_saved_csum(struct ila_params *p);
97 107
98 struct ila_net { 108 struct ila_net {
99 struct { 109 struct {
100 struct rhashtable rhash_table; 110 struct rhashtable rhash_table;
101 spinlock_t *locks; /* Bucket l 111 spinlock_t *locks; /* Bucket locks for entry manipulation */
102 unsigned int locks_mask; 112 unsigned int locks_mask;
103 bool hooks_registered; 113 bool hooks_registered;
104 } xlat; 114 } xlat;
105 }; 115 };
106 116
107 int ila_lwt_init(void); 117 int ila_lwt_init(void);
108 void ila_lwt_fini(void); 118 void ila_lwt_fini(void);
109 119
110 int ila_xlat_init_net(struct net *net); 120 int ila_xlat_init_net(struct net *net);
111 void ila_xlat_pre_exit_net(struct net *net); <<
112 void ila_xlat_exit_net(struct net *net); 121 void ila_xlat_exit_net(struct net *net);
113 122
114 int ila_xlat_nl_cmd_add_mapping(struct sk_buff 123 int ila_xlat_nl_cmd_add_mapping(struct sk_buff *skb, struct genl_info *info);
115 int ila_xlat_nl_cmd_del_mapping(struct sk_buff 124 int ila_xlat_nl_cmd_del_mapping(struct sk_buff *skb, struct genl_info *info);
116 int ila_xlat_nl_cmd_get_mapping(struct sk_buff 125 int ila_xlat_nl_cmd_get_mapping(struct sk_buff *skb, struct genl_info *info);
117 int ila_xlat_nl_cmd_flush(struct sk_buff *skb, 126 int ila_xlat_nl_cmd_flush(struct sk_buff *skb, struct genl_info *info);
118 int ila_xlat_nl_dump_start(struct netlink_call 127 int ila_xlat_nl_dump_start(struct netlink_callback *cb);
119 int ila_xlat_nl_dump_done(struct netlink_callb 128 int ila_xlat_nl_dump_done(struct netlink_callback *cb);
120 int ila_xlat_nl_dump(struct sk_buff *skb, stru 129 int ila_xlat_nl_dump(struct sk_buff *skb, struct netlink_callback *cb);
121 130
122 extern unsigned int ila_net_id; 131 extern unsigned int ila_net_id;
123 132
124 extern struct genl_family ila_nl_family; 133 extern struct genl_family ila_nl_family;
125 134
126 #endif /* __ILA_H */ 135 #endif /* __ILA_H */
127 136
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