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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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351596aad5
Add structures for identifiers, locators, and an ila address which is composed of a locator and identifier and in6_addr can be cast to it. This includes a three bit type field and enums for the types defined in ILA I-D. In ILA lwt don't allow user to set a translation for a non-ILA address (type of identifier is zero meaning it is an IID). This also requires that the destination prefix is at least 65 bytes (64 bit locator and first byte of identifier). Signed-off-by: Tom Herbert <tom@herbertland.com> Signed-off-by: David S. Miller <davem@davemloft.net>
110 lines
2.1 KiB
C
110 lines
2.1 KiB
C
/*
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* Copyright (c) 2015 Tom Herbert <tom@herbertland.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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*/
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#ifndef __ILA_H
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#define __ILA_H
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#include <linux/errno.h>
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#include <linux/ip.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/socket.h>
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#include <linux/skbuff.h>
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#include <linux/types.h>
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#include <net/checksum.h>
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#include <net/ip.h>
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#include <net/protocol.h>
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#include <uapi/linux/ila.h>
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struct ila_locator {
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union {
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__u8 v8[8];
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__be16 v16[4];
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__be32 v32[2];
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__be64 v64;
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};
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};
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struct ila_identifier {
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union {
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struct {
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#if defined(__LITTLE_ENDIAN_BITFIELD)
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u8 __space:5;
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u8 type:3;
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#elif defined(__BIG_ENDIAN_BITFIELD)
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u8 type:3;
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u8 __space:5;
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#else
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#error "Adjust your <asm/byteorder.h> defines"
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#endif
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u8 __space2[7];
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};
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__u8 v8[8];
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__be16 v16[4];
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__be32 v32[2];
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__be64 v64;
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};
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};
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enum {
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ILA_ATYPE_IID = 0,
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ILA_ATYPE_LUID,
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ILA_ATYPE_VIRT_V4,
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ILA_ATYPE_VIRT_UNI_V6,
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ILA_ATYPE_VIRT_MULTI_V6,
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ILA_ATYPE_RSVD_1,
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ILA_ATYPE_RSVD_2,
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ILA_ATYPE_RSVD_3,
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};
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struct ila_addr {
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union {
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struct in6_addr addr;
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struct {
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struct ila_locator loc;
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struct ila_identifier ident;
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};
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};
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};
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static inline struct ila_addr *ila_a2i(struct in6_addr *addr)
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{
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return (struct ila_addr *)addr;
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}
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static inline bool ila_addr_is_ila(struct ila_addr *iaddr)
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{
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return (iaddr->ident.type != ILA_ATYPE_IID);
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}
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struct ila_params {
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struct ila_locator locator;
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struct ila_locator locator_match;
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__wsum csum_diff;
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};
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static inline __wsum compute_csum_diff8(const __be32 *from, const __be32 *to)
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{
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__be32 diff[] = {
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~from[0], ~from[1], to[0], to[1],
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};
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return csum_partial(diff, sizeof(diff), 0);
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}
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void ila_update_ipv6_locator(struct sk_buff *skb, struct ila_params *p);
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int ila_lwt_init(void);
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void ila_lwt_fini(void);
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int ila_xlat_init(void);
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void ila_xlat_fini(void);
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#endif /* __ILA_H */
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