mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-25 16:15:29 +07:00
4018ab1875
This patch extends bpf_tunnel_key with a tunnel_label member, that maps to ip_tunnel_key's label so underlying backends like vxlan and geneve can propagate the label to udp_tunnel6_xmit_skb(), where it's being set in the IPv6 header. It allows for having 20 more bits to encode/decode flow related meta information programmatically. Tested with vxlan and geneve. Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
382 lines
11 KiB
C
382 lines
11 KiB
C
/* Copyright (c) 2011-2014 PLUMgrid, http://plumgrid.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 version 2 of the GNU General Public
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* License as published by the Free Software Foundation.
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*/
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#ifndef _UAPI__LINUX_BPF_H__
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#define _UAPI__LINUX_BPF_H__
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#include <linux/types.h>
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#include <linux/bpf_common.h>
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/* Extended instruction set based on top of classic BPF */
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/* instruction classes */
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#define BPF_ALU64 0x07 /* alu mode in double word width */
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/* ld/ldx fields */
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#define BPF_DW 0x18 /* double word */
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#define BPF_XADD 0xc0 /* exclusive add */
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/* alu/jmp fields */
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#define BPF_MOV 0xb0 /* mov reg to reg */
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#define BPF_ARSH 0xc0 /* sign extending arithmetic shift right */
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/* change endianness of a register */
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#define BPF_END 0xd0 /* flags for endianness conversion: */
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#define BPF_TO_LE 0x00 /* convert to little-endian */
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#define BPF_TO_BE 0x08 /* convert to big-endian */
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#define BPF_FROM_LE BPF_TO_LE
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#define BPF_FROM_BE BPF_TO_BE
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#define BPF_JNE 0x50 /* jump != */
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#define BPF_JSGT 0x60 /* SGT is signed '>', GT in x86 */
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#define BPF_JSGE 0x70 /* SGE is signed '>=', GE in x86 */
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#define BPF_CALL 0x80 /* function call */
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#define BPF_EXIT 0x90 /* function return */
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/* Register numbers */
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enum {
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BPF_REG_0 = 0,
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BPF_REG_1,
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BPF_REG_2,
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BPF_REG_3,
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BPF_REG_4,
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BPF_REG_5,
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BPF_REG_6,
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BPF_REG_7,
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BPF_REG_8,
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BPF_REG_9,
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BPF_REG_10,
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__MAX_BPF_REG,
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};
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/* BPF has 10 general purpose 64-bit registers and stack frame. */
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#define MAX_BPF_REG __MAX_BPF_REG
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struct bpf_insn {
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__u8 code; /* opcode */
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__u8 dst_reg:4; /* dest register */
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__u8 src_reg:4; /* source register */
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__s16 off; /* signed offset */
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__s32 imm; /* signed immediate constant */
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};
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/* BPF syscall commands, see bpf(2) man-page for details. */
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enum bpf_cmd {
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BPF_MAP_CREATE,
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BPF_MAP_LOOKUP_ELEM,
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BPF_MAP_UPDATE_ELEM,
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BPF_MAP_DELETE_ELEM,
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BPF_MAP_GET_NEXT_KEY,
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BPF_PROG_LOAD,
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BPF_OBJ_PIN,
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BPF_OBJ_GET,
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};
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enum bpf_map_type {
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BPF_MAP_TYPE_UNSPEC,
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BPF_MAP_TYPE_HASH,
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BPF_MAP_TYPE_ARRAY,
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BPF_MAP_TYPE_PROG_ARRAY,
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BPF_MAP_TYPE_PERF_EVENT_ARRAY,
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BPF_MAP_TYPE_PERCPU_HASH,
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BPF_MAP_TYPE_PERCPU_ARRAY,
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BPF_MAP_TYPE_STACK_TRACE,
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};
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enum bpf_prog_type {
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BPF_PROG_TYPE_UNSPEC,
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BPF_PROG_TYPE_SOCKET_FILTER,
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BPF_PROG_TYPE_KPROBE,
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BPF_PROG_TYPE_SCHED_CLS,
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BPF_PROG_TYPE_SCHED_ACT,
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};
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#define BPF_PSEUDO_MAP_FD 1
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/* flags for BPF_MAP_UPDATE_ELEM command */
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#define BPF_ANY 0 /* create new element or update existing */
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#define BPF_NOEXIST 1 /* create new element if it didn't exist */
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#define BPF_EXIST 2 /* update existing element */
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#define BPF_F_NO_PREALLOC (1U << 0)
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union bpf_attr {
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struct { /* anonymous struct used by BPF_MAP_CREATE command */
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__u32 map_type; /* one of enum bpf_map_type */
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__u32 key_size; /* size of key in bytes */
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__u32 value_size; /* size of value in bytes */
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__u32 max_entries; /* max number of entries in a map */
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__u32 map_flags; /* prealloc or not */
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};
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struct { /* anonymous struct used by BPF_MAP_*_ELEM commands */
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__u32 map_fd;
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__aligned_u64 key;
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union {
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__aligned_u64 value;
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__aligned_u64 next_key;
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};
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__u64 flags;
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};
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struct { /* anonymous struct used by BPF_PROG_LOAD command */
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__u32 prog_type; /* one of enum bpf_prog_type */
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__u32 insn_cnt;
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__aligned_u64 insns;
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__aligned_u64 license;
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__u32 log_level; /* verbosity level of verifier */
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__u32 log_size; /* size of user buffer */
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__aligned_u64 log_buf; /* user supplied buffer */
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__u32 kern_version; /* checked when prog_type=kprobe */
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};
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struct { /* anonymous struct used by BPF_OBJ_* commands */
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__aligned_u64 pathname;
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__u32 bpf_fd;
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};
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} __attribute__((aligned(8)));
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/* integer value in 'imm' field of BPF_CALL instruction selects which helper
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* function eBPF program intends to call
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*/
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enum bpf_func_id {
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BPF_FUNC_unspec,
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BPF_FUNC_map_lookup_elem, /* void *map_lookup_elem(&map, &key) */
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BPF_FUNC_map_update_elem, /* int map_update_elem(&map, &key, &value, flags) */
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BPF_FUNC_map_delete_elem, /* int map_delete_elem(&map, &key) */
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BPF_FUNC_probe_read, /* int bpf_probe_read(void *dst, int size, void *src) */
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BPF_FUNC_ktime_get_ns, /* u64 bpf_ktime_get_ns(void) */
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BPF_FUNC_trace_printk, /* int bpf_trace_printk(const char *fmt, int fmt_size, ...) */
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BPF_FUNC_get_prandom_u32, /* u32 prandom_u32(void) */
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BPF_FUNC_get_smp_processor_id, /* u32 raw_smp_processor_id(void) */
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/**
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* skb_store_bytes(skb, offset, from, len, flags) - store bytes into packet
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* @skb: pointer to skb
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* @offset: offset within packet from skb->mac_header
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* @from: pointer where to copy bytes from
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* @len: number of bytes to store into packet
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* @flags: bit 0 - if true, recompute skb->csum
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* other bits - reserved
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* Return: 0 on success
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*/
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BPF_FUNC_skb_store_bytes,
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/**
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* l3_csum_replace(skb, offset, from, to, flags) - recompute IP checksum
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* @skb: pointer to skb
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* @offset: offset within packet where IP checksum is located
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* @from: old value of header field
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* @to: new value of header field
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* @flags: bits 0-3 - size of header field
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* other bits - reserved
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* Return: 0 on success
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*/
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BPF_FUNC_l3_csum_replace,
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/**
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* l4_csum_replace(skb, offset, from, to, flags) - recompute TCP/UDP checksum
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* @skb: pointer to skb
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* @offset: offset within packet where TCP/UDP checksum is located
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* @from: old value of header field
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* @to: new value of header field
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* @flags: bits 0-3 - size of header field
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* bit 4 - is pseudo header
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* other bits - reserved
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* Return: 0 on success
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*/
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BPF_FUNC_l4_csum_replace,
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/**
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* bpf_tail_call(ctx, prog_array_map, index) - jump into another BPF program
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* @ctx: context pointer passed to next program
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* @prog_array_map: pointer to map which type is BPF_MAP_TYPE_PROG_ARRAY
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* @index: index inside array that selects specific program to run
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* Return: 0 on success
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*/
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BPF_FUNC_tail_call,
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/**
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* bpf_clone_redirect(skb, ifindex, flags) - redirect to another netdev
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* @skb: pointer to skb
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* @ifindex: ifindex of the net device
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* @flags: bit 0 - if set, redirect to ingress instead of egress
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* other bits - reserved
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* Return: 0 on success
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*/
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BPF_FUNC_clone_redirect,
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/**
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* u64 bpf_get_current_pid_tgid(void)
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* Return: current->tgid << 32 | current->pid
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*/
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BPF_FUNC_get_current_pid_tgid,
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/**
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* u64 bpf_get_current_uid_gid(void)
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* Return: current_gid << 32 | current_uid
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*/
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BPF_FUNC_get_current_uid_gid,
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/**
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* bpf_get_current_comm(char *buf, int size_of_buf)
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* stores current->comm into buf
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* Return: 0 on success
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*/
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BPF_FUNC_get_current_comm,
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/**
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* bpf_get_cgroup_classid(skb) - retrieve a proc's classid
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* @skb: pointer to skb
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* Return: classid if != 0
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*/
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BPF_FUNC_get_cgroup_classid,
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BPF_FUNC_skb_vlan_push, /* bpf_skb_vlan_push(skb, vlan_proto, vlan_tci) */
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BPF_FUNC_skb_vlan_pop, /* bpf_skb_vlan_pop(skb) */
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/**
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* bpf_skb_[gs]et_tunnel_key(skb, key, size, flags)
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* retrieve or populate tunnel metadata
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* @skb: pointer to skb
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* @key: pointer to 'struct bpf_tunnel_key'
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* @size: size of 'struct bpf_tunnel_key'
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* @flags: room for future extensions
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* Retrun: 0 on success
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*/
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BPF_FUNC_skb_get_tunnel_key,
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BPF_FUNC_skb_set_tunnel_key,
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BPF_FUNC_perf_event_read, /* u64 bpf_perf_event_read(&map, index) */
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/**
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* bpf_redirect(ifindex, flags) - redirect to another netdev
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* @ifindex: ifindex of the net device
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* @flags: bit 0 - if set, redirect to ingress instead of egress
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* other bits - reserved
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* Return: TC_ACT_REDIRECT
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*/
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BPF_FUNC_redirect,
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/**
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* bpf_get_route_realm(skb) - retrieve a dst's tclassid
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* @skb: pointer to skb
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* Return: realm if != 0
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*/
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BPF_FUNC_get_route_realm,
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/**
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* bpf_perf_event_output(ctx, map, index, data, size) - output perf raw sample
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* @ctx: struct pt_regs*
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* @map: pointer to perf_event_array map
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* @index: index of event in the map
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* @data: data on stack to be output as raw data
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* @size: size of data
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* Return: 0 on success
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*/
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BPF_FUNC_perf_event_output,
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BPF_FUNC_skb_load_bytes,
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/**
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* bpf_get_stackid(ctx, map, flags) - walk user or kernel stack and return id
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* @ctx: struct pt_regs*
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* @map: pointer to stack_trace map
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* @flags: bits 0-7 - numer of stack frames to skip
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* bit 8 - collect user stack instead of kernel
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* bit 9 - compare stacks by hash only
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* bit 10 - if two different stacks hash into the same stackid
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* discard old
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* other bits - reserved
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* Return: >= 0 stackid on success or negative error
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*/
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BPF_FUNC_get_stackid,
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/**
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* bpf_csum_diff(from, from_size, to, to_size, seed) - calculate csum diff
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* @from: raw from buffer
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* @from_size: length of from buffer
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* @to: raw to buffer
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* @to_size: length of to buffer
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* @seed: optional seed
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* Return: csum result
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*/
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BPF_FUNC_csum_diff,
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/**
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* bpf_skb_[gs]et_tunnel_opt(skb, opt, size)
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* retrieve or populate tunnel options metadata
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* @skb: pointer to skb
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* @opt: pointer to raw tunnel option data
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* @size: size of @opt
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* Return: 0 on success for set, option size for get
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*/
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BPF_FUNC_skb_get_tunnel_opt,
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BPF_FUNC_skb_set_tunnel_opt,
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__BPF_FUNC_MAX_ID,
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};
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/* All flags used by eBPF helper functions, placed here. */
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/* BPF_FUNC_skb_store_bytes flags. */
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#define BPF_F_RECOMPUTE_CSUM (1ULL << 0)
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#define BPF_F_INVALIDATE_HASH (1ULL << 1)
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/* BPF_FUNC_l3_csum_replace and BPF_FUNC_l4_csum_replace flags.
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* First 4 bits are for passing the header field size.
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*/
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#define BPF_F_HDR_FIELD_MASK 0xfULL
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/* BPF_FUNC_l4_csum_replace flags. */
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#define BPF_F_PSEUDO_HDR (1ULL << 4)
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#define BPF_F_MARK_MANGLED_0 (1ULL << 5)
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/* BPF_FUNC_clone_redirect and BPF_FUNC_redirect flags. */
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#define BPF_F_INGRESS (1ULL << 0)
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/* BPF_FUNC_skb_set_tunnel_key and BPF_FUNC_skb_get_tunnel_key flags. */
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#define BPF_F_TUNINFO_IPV6 (1ULL << 0)
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/* BPF_FUNC_get_stackid flags. */
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#define BPF_F_SKIP_FIELD_MASK 0xffULL
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#define BPF_F_USER_STACK (1ULL << 8)
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#define BPF_F_FAST_STACK_CMP (1ULL << 9)
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#define BPF_F_REUSE_STACKID (1ULL << 10)
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/* BPF_FUNC_skb_set_tunnel_key flags. */
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#define BPF_F_ZERO_CSUM_TX (1ULL << 1)
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#define BPF_F_DONT_FRAGMENT (1ULL << 2)
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/* user accessible mirror of in-kernel sk_buff.
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* new fields can only be added to the end of this structure
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*/
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struct __sk_buff {
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__u32 len;
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__u32 pkt_type;
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__u32 mark;
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__u32 queue_mapping;
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__u32 protocol;
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__u32 vlan_present;
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__u32 vlan_tci;
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__u32 vlan_proto;
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__u32 priority;
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__u32 ingress_ifindex;
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__u32 ifindex;
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__u32 tc_index;
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__u32 cb[5];
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__u32 hash;
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__u32 tc_classid;
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};
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struct bpf_tunnel_key {
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__u32 tunnel_id;
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union {
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__u32 remote_ipv4;
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__u32 remote_ipv6[4];
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};
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__u8 tunnel_tos;
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__u8 tunnel_ttl;
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__u32 tunnel_label;
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};
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#endif /* _UAPI__LINUX_BPF_H__ */
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