| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame^] | 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 | static inline bool ila_addr_is_ila(struct ila_addr *iaddr) |
| 72 | { |
| 73 | return (iaddr->ident.type != ILA_ATYPE_IID); |
| 74 | } |
| 75 | |
| 76 | struct ila_params { |
| 77 | struct ila_locator locator; |
| 78 | struct ila_locator locator_match; |
| 79 | __wsum csum_diff; |
| 80 | u8 csum_mode; |
| 81 | u8 ident_type; |
| 82 | }; |
| 83 | |
| 84 | static inline __wsum compute_csum_diff8(const __be32 *from, const __be32 *to) |
| 85 | { |
| 86 | __be32 diff[] = { |
| 87 | ~from[0], ~from[1], to[0], to[1], |
| 88 | }; |
| 89 | |
| 90 | return csum_partial(diff, sizeof(diff), 0); |
| 91 | } |
| 92 | |
| 93 | static inline bool ila_csum_neutral_set(struct ila_identifier ident) |
| 94 | { |
| 95 | return !!(ident.csum_neutral); |
| 96 | } |
| 97 | |
| 98 | void ila_update_ipv6_locator(struct sk_buff *skb, struct ila_params *p, |
| 99 | bool set_csum_neutral); |
| 100 | |
| 101 | void ila_init_saved_csum(struct ila_params *p); |
| 102 | |
| 103 | struct ila_net { |
| 104 | struct { |
| 105 | struct rhashtable rhash_table; |
| 106 | spinlock_t *locks; /* Bucket locks for entry manipulation */ |
| 107 | unsigned int locks_mask; |
| 108 | bool hooks_registered; |
| 109 | } xlat; |
| 110 | }; |
| 111 | |
| 112 | int ila_lwt_init(void); |
| 113 | void ila_lwt_fini(void); |
| 114 | |
| 115 | int ila_xlat_init_net(struct net *net); |
| 116 | void ila_xlat_pre_exit_net(struct net *net); |
| 117 | void ila_xlat_exit_net(struct net *net); |
| 118 | |
| 119 | int ila_xlat_nl_cmd_add_mapping(struct sk_buff *skb, struct genl_info *info); |
| 120 | int ila_xlat_nl_cmd_del_mapping(struct sk_buff *skb, struct genl_info *info); |
| 121 | int ila_xlat_nl_cmd_get_mapping(struct sk_buff *skb, struct genl_info *info); |
| 122 | int ila_xlat_nl_cmd_flush(struct sk_buff *skb, struct genl_info *info); |
| 123 | int ila_xlat_nl_dump_start(struct netlink_callback *cb); |
| 124 | int ila_xlat_nl_dump_done(struct netlink_callback *cb); |
| 125 | int ila_xlat_nl_dump(struct sk_buff *skb, struct netlink_callback *cb); |
| 126 | |
| 127 | extern unsigned int ila_net_id; |
| 128 | |
| 129 | extern struct genl_family ila_nl_family; |
| 130 | |
| 131 | #endif /* __ILA_H */ |