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 22 struct ila_locator { 23 union { 24 __u8 v8[8]; 25 __be16 v16[4]; 26 __be32 v32[2]; 27 __be64 v64; 28 }; 29 }; 30 31 struct 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 56 struct 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 66 static inline struct ila_addr *ila_a2i(struct in6_addr *addr) 67 { 68 return (struct ila_addr *)addr; 69 } 70 71 struct 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 79 static 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 88 static inline bool ila_csum_neutral_set(struct ila_identifier ident) 89 { 90 return !!(ident.csum_neutral); 91 } 92 93 void ila_update_ipv6_locator(struct sk_buff *skb, struct ila_params *p, 94 bool set_csum_neutral); 95 96 void ila_init_saved_csum(struct ila_params *p); 97 98 struct 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 }; 106 107 int ila_lwt_init(void); 108 void ila_lwt_fini(void); 109 110 int ila_xlat_init_net(struct net *net); 111 void ila_xlat_exit_net(struct net *net); 112 113 int ila_xlat_nl_cmd_add_mapping(struct sk_buff *skb, struct genl_info *info); 114 int ila_xlat_nl_cmd_del_mapping(struct sk_buff *skb, struct genl_info *info); 115 int ila_xlat_nl_cmd_get_mapping(struct sk_buff *skb, struct genl_info *info); 116 int ila_xlat_nl_cmd_flush(struct sk_buff *skb, struct genl_info *info); 117 int ila_xlat_nl_dump_start(struct netlink_callback *cb); 118 int ila_xlat_nl_dump_done(struct netlink_callback *cb); 119 int ila_xlat_nl_dump(struct sk_buff *skb, struct netlink_callback *cb); 120 121 extern unsigned int ila_net_id; 122 123 extern struct genl_family ila_nl_family; 124 125 #endif /* __ILA_H */ 126