build-sys: add new kernel bpf.h drop-in
The defines we need are pretty comprehensive and new, hence copy in the full header from the kernel.
This commit is contained in:
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src/shared/linux/bpf.h
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673
src/shared/linux/bpf.h
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/* 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 __LINUX_BPF_H__
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#define __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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/* Key of an a BPF_MAP_TYPE_LPM_TRIE entry */
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struct bpf_lpm_trie_key {
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__u32 prefixlen; /* up to 32 for AF_INET, 128 for AF_INET6 */
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__u8 data[0]; /* Arbitrary size */
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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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BPF_PROG_ATTACH,
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BPF_PROG_DETACH,
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BPF_PROG_TEST_RUN,
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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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BPF_MAP_TYPE_CGROUP_ARRAY,
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BPF_MAP_TYPE_LRU_HASH,
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BPF_MAP_TYPE_LRU_PERCPU_HASH,
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BPF_MAP_TYPE_LPM_TRIE,
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BPF_MAP_TYPE_ARRAY_OF_MAPS,
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BPF_MAP_TYPE_HASH_OF_MAPS,
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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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BPF_PROG_TYPE_TRACEPOINT,
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BPF_PROG_TYPE_XDP,
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BPF_PROG_TYPE_PERF_EVENT,
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BPF_PROG_TYPE_CGROUP_SKB,
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BPF_PROG_TYPE_CGROUP_SOCK,
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BPF_PROG_TYPE_LWT_IN,
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BPF_PROG_TYPE_LWT_OUT,
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BPF_PROG_TYPE_LWT_XMIT,
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};
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enum bpf_attach_type {
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BPF_CGROUP_INET_INGRESS,
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BPF_CGROUP_INET_EGRESS,
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BPF_CGROUP_INET_SOCK_CREATE,
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__MAX_BPF_ATTACH_TYPE
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};
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#define MAX_BPF_ATTACH_TYPE __MAX_BPF_ATTACH_TYPE
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/* If BPF_F_ALLOW_OVERRIDE flag is used in BPF_PROG_ATTACH command
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* to the given target_fd cgroup the descendent cgroup will be able to
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* override effective bpf program that was inherited from this cgroup
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*/
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#define BPF_F_ALLOW_OVERRIDE (1U << 0)
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/* If BPF_F_STRICT_ALIGNMENT is used in BPF_PROG_LOAD command, the
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* verifier will perform strict alignment checking as if the kernel
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* has been built with CONFIG_EFFICIENT_UNALIGNED_ACCESS not set,
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* and NET_IP_ALIGN defined to 2.
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*/
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#define BPF_F_STRICT_ALIGNMENT (1U << 0)
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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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/* Instead of having one common LRU list in the
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* BPF_MAP_TYPE_LRU_[PERCPU_]HASH map, use a percpu LRU list
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* which can scale and perform better.
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* Note, the LRU nodes (including free nodes) cannot be moved
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* across different LRU lists.
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*/
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#define BPF_F_NO_COMMON_LRU (1U << 1)
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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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__u32 inner_map_fd; /* fd pointing to the inner map */
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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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__u32 prog_flags;
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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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struct { /* anonymous struct used by BPF_PROG_ATTACH/DETACH commands */
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__u32 target_fd; /* container object to attach to */
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__u32 attach_bpf_fd; /* eBPF program to attach */
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__u32 attach_type;
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__u32 attach_flags;
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};
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struct { /* anonymous struct used by BPF_PROG_TEST_RUN command */
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__u32 prog_fd;
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__u32 retval;
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__u32 data_size_in;
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__u32 data_size_out;
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__aligned_u64 data_in;
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__aligned_u64 data_out;
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__u32 repeat;
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__u32 duration;
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} test;
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} __attribute__((aligned(8)));
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/* BPF helper function descriptions:
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*
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* void *bpf_map_lookup_elem(&map, &key)
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* Return: Map value or NULL
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*
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* int bpf_map_update_elem(&map, &key, &value, flags)
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* Return: 0 on success or negative error
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*
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* int bpf_map_delete_elem(&map, &key)
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* Return: 0 on success or negative error
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*
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* int bpf_probe_read(void *dst, int size, void *src)
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* Return: 0 on success or negative error
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*
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* u64 bpf_ktime_get_ns(void)
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* Return: current ktime
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*
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* int bpf_trace_printk(const char *fmt, int fmt_size, ...)
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* Return: length of buffer written or negative error
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*
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* u32 bpf_prandom_u32(void)
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* Return: random value
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*
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* u32 bpf_raw_smp_processor_id(void)
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* Return: SMP processor ID
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*
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* int bpf_skb_store_bytes(skb, offset, from, len, flags)
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* 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 or negative error
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*
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* int bpf_l3_csum_replace(skb, offset, from, to, flags)
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* 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 or negative error
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*
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* int bpf_l4_csum_replace(skb, offset, from, to, flags)
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* 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 or negative error
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*
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* int bpf_tail_call(ctx, prog_array_map, index)
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* 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 or negative error
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*
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* int bpf_clone_redirect(skb, ifindex, flags)
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* 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 or negative error
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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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* 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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* int 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 or negative error
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*
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* u32 bpf_get_cgroup_classid(skb)
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* 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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* int bpf_skb_vlan_push(skb, vlan_proto, vlan_tci)
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* Return: 0 on success or negative error
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*
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* int bpf_skb_vlan_pop(skb)
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* Return: 0 on success or negative error
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*
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* int bpf_skb_get_tunnel_key(skb, key, size, flags)
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* int bpf_skb_set_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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* Return: 0 on success or negative error
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*
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* u64 bpf_perf_event_read(&map, index)
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* Return: Number events read or error code
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*
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* int bpf_redirect(ifindex, flags)
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* 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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* u32 bpf_get_route_realm(skb)
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* 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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* int bpf_perf_event_output(ctx, map, index, data, size)
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* 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 or negative error
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*
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* int bpf_get_stackid(ctx, map, flags)
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* 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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* s64 bpf_csum_diff(from, from_size, to, to_size, seed)
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* 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 or negative error code
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*
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* int bpf_skb_get_tunnel_opt(skb, opt, size)
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* retrieve 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: option size
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*
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* int bpf_skb_set_tunnel_opt(skb, opt, size)
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* 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 or negative error
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*
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* int bpf_skb_change_proto(skb, proto, flags)
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* Change protocol of the skb. Currently supported is v4 -> v6,
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* v6 -> v4 transitions. The helper will also resize the skb. eBPF
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* program is expected to fill the new headers via skb_store_bytes
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* and lX_csum_replace.
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* @skb: pointer to skb
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* @proto: new skb->protocol type
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* @flags: reserved
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* Return: 0 on success or negative error
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*
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* int bpf_skb_change_type(skb, type)
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* Change packet type of skb.
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* @skb: pointer to skb
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* @type: new skb->pkt_type type
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* Return: 0 on success or negative error
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*
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* int bpf_skb_under_cgroup(skb, map, index)
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* Check cgroup2 membership of skb
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* @skb: pointer to skb
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* @map: pointer to bpf_map in BPF_MAP_TYPE_CGROUP_ARRAY type
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* @index: index of the cgroup in the bpf_map
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* Return:
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* == 0 skb failed the cgroup2 descendant test
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* == 1 skb succeeded the cgroup2 descendant test
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* < 0 error
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*
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* u32 bpf_get_hash_recalc(skb)
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* Retrieve and possibly recalculate skb->hash.
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* @skb: pointer to skb
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* Return: hash
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*
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* u64 bpf_get_current_task(void)
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* Returns current task_struct
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* Return: current
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*
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* int bpf_probe_write_user(void *dst, void *src, int len)
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* safely attempt to write to a location
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* @dst: destination address in userspace
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* @src: source address on stack
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* @len: number of bytes to copy
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* Return: 0 on success or negative error
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*
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* int bpf_current_task_under_cgroup(map, index)
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* Check cgroup2 membership of current task
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* @map: pointer to bpf_map in BPF_MAP_TYPE_CGROUP_ARRAY type
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* @index: index of the cgroup in the bpf_map
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* Return:
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* == 0 current failed the cgroup2 descendant test
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* == 1 current succeeded the cgroup2 descendant test
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* < 0 error
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*
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* int bpf_skb_change_tail(skb, len, flags)
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* The helper will resize the skb to the given new size, to be used f.e.
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* with control messages.
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* @skb: pointer to skb
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* @len: new skb length
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* @flags: reserved
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* Return: 0 on success or negative error
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*
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* int bpf_skb_pull_data(skb, len)
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* The helper will pull in non-linear data in case the skb is non-linear
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* and not all of len are part of the linear section. Only needed for
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* read/write with direct packet access.
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* @skb: pointer to skb
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* @len: len to make read/writeable
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* Return: 0 on success or negative error
|
||||
*
|
||||
* s64 bpf_csum_update(skb, csum)
|
||||
* Adds csum into skb->csum in case of CHECKSUM_COMPLETE.
|
||||
* @skb: pointer to skb
|
||||
* @csum: csum to add
|
||||
* Return: csum on success or negative error
|
||||
*
|
||||
* void bpf_set_hash_invalid(skb)
|
||||
* Invalidate current skb->hash.
|
||||
* @skb: pointer to skb
|
||||
*
|
||||
* int bpf_get_numa_node_id()
|
||||
* Return: Id of current NUMA node.
|
||||
*
|
||||
* int bpf_skb_change_head()
|
||||
* Grows headroom of skb and adjusts MAC header offset accordingly.
|
||||
* Will extends/reallocae as required automatically.
|
||||
* May change skb data pointer and will thus invalidate any check
|
||||
* performed for direct packet access.
|
||||
* @skb: pointer to skb
|
||||
* @len: length of header to be pushed in front
|
||||
* @flags: Flags (unused for now)
|
||||
* Return: 0 on success or negative error
|
||||
*
|
||||
* int bpf_xdp_adjust_head(xdp_md, delta)
|
||||
* Adjust the xdp_md.data by delta
|
||||
* @xdp_md: pointer to xdp_md
|
||||
* @delta: An positive/negative integer to be added to xdp_md.data
|
||||
* Return: 0 on success or negative on error
|
||||
*
|
||||
* int bpf_probe_read_str(void *dst, int size, const void *unsafe_ptr)
|
||||
* Copy a NUL terminated string from unsafe address. In case the string
|
||||
* length is smaller than size, the target is not padded with further NUL
|
||||
* bytes. In case the string length is larger than size, just count-1
|
||||
* bytes are copied and the last byte is set to NUL.
|
||||
* @dst: destination address
|
||||
* @size: maximum number of bytes to copy, including the trailing NUL
|
||||
* @unsafe_ptr: unsafe address
|
||||
* Return:
|
||||
* > 0 length of the string including the trailing NUL on success
|
||||
* < 0 error
|
||||
*
|
||||
* u64 bpf_get_socket_cookie(skb)
|
||||
* Get the cookie for the socket stored inside sk_buff.
|
||||
* @skb: pointer to skb
|
||||
* Return: 8 Bytes non-decreasing number on success or 0 if the socket
|
||||
* field is missing inside sk_buff
|
||||
*
|
||||
* u32 bpf_get_socket_uid(skb)
|
||||
* Get the owner uid of the socket stored inside sk_buff.
|
||||
* @skb: pointer to skb
|
||||
* Return: uid of the socket owner on success or overflowuid if failed.
|
||||
*/
|
||||
#define __BPF_FUNC_MAPPER(FN) \
|
||||
FN(unspec), \
|
||||
FN(map_lookup_elem), \
|
||||
FN(map_update_elem), \
|
||||
FN(map_delete_elem), \
|
||||
FN(probe_read), \
|
||||
FN(ktime_get_ns), \
|
||||
FN(trace_printk), \
|
||||
FN(get_prandom_u32), \
|
||||
FN(get_smp_processor_id), \
|
||||
FN(skb_store_bytes), \
|
||||
FN(l3_csum_replace), \
|
||||
FN(l4_csum_replace), \
|
||||
FN(tail_call), \
|
||||
FN(clone_redirect), \
|
||||
FN(get_current_pid_tgid), \
|
||||
FN(get_current_uid_gid), \
|
||||
FN(get_current_comm), \
|
||||
FN(get_cgroup_classid), \
|
||||
FN(skb_vlan_push), \
|
||||
FN(skb_vlan_pop), \
|
||||
FN(skb_get_tunnel_key), \
|
||||
FN(skb_set_tunnel_key), \
|
||||
FN(perf_event_read), \
|
||||
FN(redirect), \
|
||||
FN(get_route_realm), \
|
||||
FN(perf_event_output), \
|
||||
FN(skb_load_bytes), \
|
||||
FN(get_stackid), \
|
||||
FN(csum_diff), \
|
||||
FN(skb_get_tunnel_opt), \
|
||||
FN(skb_set_tunnel_opt), \
|
||||
FN(skb_change_proto), \
|
||||
FN(skb_change_type), \
|
||||
FN(skb_under_cgroup), \
|
||||
FN(get_hash_recalc), \
|
||||
FN(get_current_task), \
|
||||
FN(probe_write_user), \
|
||||
FN(current_task_under_cgroup), \
|
||||
FN(skb_change_tail), \
|
||||
FN(skb_pull_data), \
|
||||
FN(csum_update), \
|
||||
FN(set_hash_invalid), \
|
||||
FN(get_numa_node_id), \
|
||||
FN(skb_change_head), \
|
||||
FN(xdp_adjust_head), \
|
||||
FN(probe_read_str), \
|
||||
FN(get_socket_cookie), \
|
||||
FN(get_socket_uid),
|
||||
|
||||
/* integer value in 'imm' field of BPF_CALL instruction selects which helper
|
||||
* function eBPF program intends to call
|
||||
*/
|
||||
#define __BPF_ENUM_FN(x) BPF_FUNC_ ## x
|
||||
enum bpf_func_id {
|
||||
__BPF_FUNC_MAPPER(__BPF_ENUM_FN)
|
||||
__BPF_FUNC_MAX_ID,
|
||||
};
|
||||
#undef __BPF_ENUM_FN
|
||||
|
||||
/* All flags used by eBPF helper functions, placed here. */
|
||||
|
||||
/* BPF_FUNC_skb_store_bytes flags. */
|
||||
#define BPF_F_RECOMPUTE_CSUM (1ULL << 0)
|
||||
#define BPF_F_INVALIDATE_HASH (1ULL << 1)
|
||||
|
||||
/* BPF_FUNC_l3_csum_replace and BPF_FUNC_l4_csum_replace flags.
|
||||
* First 4 bits are for passing the header field size.
|
||||
*/
|
||||
#define BPF_F_HDR_FIELD_MASK 0xfULL
|
||||
|
||||
/* BPF_FUNC_l4_csum_replace flags. */
|
||||
#define BPF_F_PSEUDO_HDR (1ULL << 4)
|
||||
#define BPF_F_MARK_MANGLED_0 (1ULL << 5)
|
||||
#define BPF_F_MARK_ENFORCE (1ULL << 6)
|
||||
|
||||
/* BPF_FUNC_clone_redirect and BPF_FUNC_redirect flags. */
|
||||
#define BPF_F_INGRESS (1ULL << 0)
|
||||
|
||||
/* BPF_FUNC_skb_set_tunnel_key and BPF_FUNC_skb_get_tunnel_key flags. */
|
||||
#define BPF_F_TUNINFO_IPV6 (1ULL << 0)
|
||||
|
||||
/* BPF_FUNC_get_stackid flags. */
|
||||
#define BPF_F_SKIP_FIELD_MASK 0xffULL
|
||||
#define BPF_F_USER_STACK (1ULL << 8)
|
||||
#define BPF_F_FAST_STACK_CMP (1ULL << 9)
|
||||
#define BPF_F_REUSE_STACKID (1ULL << 10)
|
||||
|
||||
/* BPF_FUNC_skb_set_tunnel_key flags. */
|
||||
#define BPF_F_ZERO_CSUM_TX (1ULL << 1)
|
||||
#define BPF_F_DONT_FRAGMENT (1ULL << 2)
|
||||
|
||||
/* BPF_FUNC_perf_event_output and BPF_FUNC_perf_event_read flags. */
|
||||
#define BPF_F_INDEX_MASK 0xffffffffULL
|
||||
#define BPF_F_CURRENT_CPU BPF_F_INDEX_MASK
|
||||
/* BPF_FUNC_perf_event_output for sk_buff input context. */
|
||||
#define BPF_F_CTXLEN_MASK (0xfffffULL << 32)
|
||||
|
||||
/* user accessible mirror of in-kernel sk_buff.
|
||||
* new fields can only be added to the end of this structure
|
||||
*/
|
||||
struct __sk_buff {
|
||||
__u32 len;
|
||||
__u32 pkt_type;
|
||||
__u32 mark;
|
||||
__u32 queue_mapping;
|
||||
__u32 protocol;
|
||||
__u32 vlan_present;
|
||||
__u32 vlan_tci;
|
||||
__u32 vlan_proto;
|
||||
__u32 priority;
|
||||
__u32 ingress_ifindex;
|
||||
__u32 ifindex;
|
||||
__u32 tc_index;
|
||||
__u32 cb[5];
|
||||
__u32 hash;
|
||||
__u32 tc_classid;
|
||||
__u32 data;
|
||||
__u32 data_end;
|
||||
__u32 napi_id;
|
||||
};
|
||||
|
||||
struct bpf_tunnel_key {
|
||||
__u32 tunnel_id;
|
||||
union {
|
||||
__u32 remote_ipv4;
|
||||
__u32 remote_ipv6[4];
|
||||
};
|
||||
__u8 tunnel_tos;
|
||||
__u8 tunnel_ttl;
|
||||
__u16 tunnel_ext;
|
||||
__u32 tunnel_label;
|
||||
};
|
||||
|
||||
/* Generic BPF return codes which all BPF program types may support.
|
||||
* The values are binary compatible with their TC_ACT_* counter-part to
|
||||
* provide backwards compatibility with existing SCHED_CLS and SCHED_ACT
|
||||
* programs.
|
||||
*
|
||||
* XDP is handled seprately, see XDP_*.
|
||||
*/
|
||||
enum bpf_ret_code {
|
||||
BPF_OK = 0,
|
||||
/* 1 reserved */
|
||||
BPF_DROP = 2,
|
||||
/* 3-6 reserved */
|
||||
BPF_REDIRECT = 7,
|
||||
/* >127 are reserved for prog type specific return codes */
|
||||
};
|
||||
|
||||
struct bpf_sock {
|
||||
__u32 bound_dev_if;
|
||||
__u32 family;
|
||||
__u32 type;
|
||||
__u32 protocol;
|
||||
};
|
||||
|
||||
#define XDP_PACKET_HEADROOM 256
|
||||
|
||||
/* User return codes for XDP prog type.
|
||||
* A valid XDP program must return one of these defined values. All other
|
||||
* return codes are reserved for future use. Unknown return codes will result
|
||||
* in packet drop.
|
||||
*/
|
||||
enum xdp_action {
|
||||
XDP_ABORTED = 0,
|
||||
XDP_DROP,
|
||||
XDP_PASS,
|
||||
XDP_TX,
|
||||
};
|
||||
|
||||
/* user accessible metadata for XDP packet hook
|
||||
* new fields must be added to the end of this structure
|
||||
*/
|
||||
struct xdp_md {
|
||||
__u32 data;
|
||||
__u32 data_end;
|
||||
};
|
||||
|
||||
#endif /* __LINUX_BPF_H__ */
|
55
src/shared/linux/bpf_common.h
Normal file
55
src/shared/linux/bpf_common.h
Normal file
|
@ -0,0 +1,55 @@
|
|||
#ifndef __LINUX_BPF_COMMON_H__
|
||||
#define __LINUX_BPF_COMMON_H__
|
||||
|
||||
/* Instruction classes */
|
||||
#define BPF_CLASS(code) ((code) & 0x07)
|
||||
#define BPF_LD 0x00
|
||||
#define BPF_LDX 0x01
|
||||
#define BPF_ST 0x02
|
||||
#define BPF_STX 0x03
|
||||
#define BPF_ALU 0x04
|
||||
#define BPF_JMP 0x05
|
||||
#define BPF_RET 0x06
|
||||
#define BPF_MISC 0x07
|
||||
|
||||
/* ld/ldx fields */
|
||||
#define BPF_SIZE(code) ((code) & 0x18)
|
||||
#define BPF_W 0x00
|
||||
#define BPF_H 0x08
|
||||
#define BPF_B 0x10
|
||||
#define BPF_MODE(code) ((code) & 0xe0)
|
||||
#define BPF_IMM 0x00
|
||||
#define BPF_ABS 0x20
|
||||
#define BPF_IND 0x40
|
||||
#define BPF_MEM 0x60
|
||||
#define BPF_LEN 0x80
|
||||
#define BPF_MSH 0xa0
|
||||
|
||||
/* alu/jmp fields */
|
||||
#define BPF_OP(code) ((code) & 0xf0)
|
||||
#define BPF_ADD 0x00
|
||||
#define BPF_SUB 0x10
|
||||
#define BPF_MUL 0x20
|
||||
#define BPF_DIV 0x30
|
||||
#define BPF_OR 0x40
|
||||
#define BPF_AND 0x50
|
||||
#define BPF_LSH 0x60
|
||||
#define BPF_RSH 0x70
|
||||
#define BPF_NEG 0x80
|
||||
#define BPF_MOD 0x90
|
||||
#define BPF_XOR 0xa0
|
||||
|
||||
#define BPF_JA 0x00
|
||||
#define BPF_JEQ 0x10
|
||||
#define BPF_JGT 0x20
|
||||
#define BPF_JGE 0x30
|
||||
#define BPF_JSET 0x40
|
||||
#define BPF_SRC(code) ((code) & 0x08)
|
||||
#define BPF_K 0x00
|
||||
#define BPF_X 0x08
|
||||
|
||||
#ifndef BPF_MAXINSNS
|
||||
#define BPF_MAXINSNS 4096
|
||||
#endif
|
||||
|
||||
#endif /* __LINUX_BPF_COMMON_H__ */
|
198
src/shared/linux/libbpf.h
Normal file
198
src/shared/linux/libbpf.h
Normal file
|
@ -0,0 +1,198 @@
|
|||
/* eBPF mini library */
|
||||
#ifndef __LIBBPF_H
|
||||
#define __LIBBPF_H
|
||||
|
||||
#include <linux/bpf.h>
|
||||
|
||||
struct bpf_insn;
|
||||
|
||||
/* ALU ops on registers, bpf_add|sub|...: dst_reg += src_reg */
|
||||
|
||||
#define BPF_ALU64_REG(OP, DST, SRC) \
|
||||
((struct bpf_insn) { \
|
||||
.code = BPF_ALU64 | BPF_OP(OP) | BPF_X, \
|
||||
.dst_reg = DST, \
|
||||
.src_reg = SRC, \
|
||||
.off = 0, \
|
||||
.imm = 0 })
|
||||
|
||||
#define BPF_ALU32_REG(OP, DST, SRC) \
|
||||
((struct bpf_insn) { \
|
||||
.code = BPF_ALU | BPF_OP(OP) | BPF_X, \
|
||||
.dst_reg = DST, \
|
||||
.src_reg = SRC, \
|
||||
.off = 0, \
|
||||
.imm = 0 })
|
||||
|
||||
/* ALU ops on immediates, bpf_add|sub|...: dst_reg += imm32 */
|
||||
|
||||
#define BPF_ALU64_IMM(OP, DST, IMM) \
|
||||
((struct bpf_insn) { \
|
||||
.code = BPF_ALU64 | BPF_OP(OP) | BPF_K, \
|
||||
.dst_reg = DST, \
|
||||
.src_reg = 0, \
|
||||
.off = 0, \
|
||||
.imm = IMM })
|
||||
|
||||
#define BPF_ALU32_IMM(OP, DST, IMM) \
|
||||
((struct bpf_insn) { \
|
||||
.code = BPF_ALU | BPF_OP(OP) | BPF_K, \
|
||||
.dst_reg = DST, \
|
||||
.src_reg = 0, \
|
||||
.off = 0, \
|
||||
.imm = IMM })
|
||||
|
||||
/* Short form of mov, dst_reg = src_reg */
|
||||
|
||||
#define BPF_MOV64_REG(DST, SRC) \
|
||||
((struct bpf_insn) { \
|
||||
.code = BPF_ALU64 | BPF_MOV | BPF_X, \
|
||||
.dst_reg = DST, \
|
||||
.src_reg = SRC, \
|
||||
.off = 0, \
|
||||
.imm = 0 })
|
||||
|
||||
#define BPF_MOV32_REG(DST, SRC) \
|
||||
((struct bpf_insn) { \
|
||||
.code = BPF_ALU | BPF_MOV | BPF_X, \
|
||||
.dst_reg = DST, \
|
||||
.src_reg = SRC, \
|
||||
.off = 0, \
|
||||
.imm = 0 })
|
||||
|
||||
/* Short form of mov, dst_reg = imm32 */
|
||||
|
||||
#define BPF_MOV64_IMM(DST, IMM) \
|
||||
((struct bpf_insn) { \
|
||||
.code = BPF_ALU64 | BPF_MOV | BPF_K, \
|
||||
.dst_reg = DST, \
|
||||
.src_reg = 0, \
|
||||
.off = 0, \
|
||||
.imm = IMM })
|
||||
|
||||
#define BPF_MOV32_IMM(DST, IMM) \
|
||||
((struct bpf_insn) { \
|
||||
.code = BPF_ALU | BPF_MOV | BPF_K, \
|
||||
.dst_reg = DST, \
|
||||
.src_reg = 0, \
|
||||
.off = 0, \
|
||||
.imm = IMM })
|
||||
|
||||
/* BPF_LD_IMM64 macro encodes single 'load 64-bit immediate' insn */
|
||||
#define BPF_LD_IMM64(DST, IMM) \
|
||||
BPF_LD_IMM64_RAW(DST, 0, IMM)
|
||||
|
||||
#define BPF_LD_IMM64_RAW(DST, SRC, IMM) \
|
||||
((struct bpf_insn) { \
|
||||
.code = BPF_LD | BPF_DW | BPF_IMM, \
|
||||
.dst_reg = DST, \
|
||||
.src_reg = SRC, \
|
||||
.off = 0, \
|
||||
.imm = (__u32) (IMM) }), \
|
||||
((struct bpf_insn) { \
|
||||
.code = 0, /* zero is reserved opcode */ \
|
||||
.dst_reg = 0, \
|
||||
.src_reg = 0, \
|
||||
.off = 0, \
|
||||
.imm = ((__u64) (IMM)) >> 32 })
|
||||
|
||||
#ifndef BPF_PSEUDO_MAP_FD
|
||||
# define BPF_PSEUDO_MAP_FD 1
|
||||
#endif
|
||||
|
||||
/* pseudo BPF_LD_IMM64 insn used to refer to process-local map_fd */
|
||||
#define BPF_LD_MAP_FD(DST, MAP_FD) \
|
||||
BPF_LD_IMM64_RAW(DST, BPF_PSEUDO_MAP_FD, MAP_FD)
|
||||
|
||||
|
||||
/* Direct packet access, R0 = *(uint *) (skb->data + imm32) */
|
||||
|
||||
#define BPF_LD_ABS(SIZE, IMM) \
|
||||
((struct bpf_insn) { \
|
||||
.code = BPF_LD | BPF_SIZE(SIZE) | BPF_ABS, \
|
||||
.dst_reg = 0, \
|
||||
.src_reg = 0, \
|
||||
.off = 0, \
|
||||
.imm = IMM })
|
||||
|
||||
/* Memory load, dst_reg = *(uint *) (src_reg + off16) */
|
||||
|
||||
#define BPF_LDX_MEM(SIZE, DST, SRC, OFF) \
|
||||
((struct bpf_insn) { \
|
||||
.code = BPF_LDX | BPF_SIZE(SIZE) | BPF_MEM, \
|
||||
.dst_reg = DST, \
|
||||
.src_reg = SRC, \
|
||||
.off = OFF, \
|
||||
.imm = 0 })
|
||||
|
||||
/* Memory store, *(uint *) (dst_reg + off16) = src_reg */
|
||||
|
||||
#define BPF_STX_MEM(SIZE, DST, SRC, OFF) \
|
||||
((struct bpf_insn) { \
|
||||
.code = BPF_STX | BPF_SIZE(SIZE) | BPF_MEM, \
|
||||
.dst_reg = DST, \
|
||||
.src_reg = SRC, \
|
||||
.off = OFF, \
|
||||
.imm = 0 })
|
||||
|
||||
/* Atomic memory add, *(uint *)(dst_reg + off16) += src_reg */
|
||||
|
||||
#define BPF_STX_XADD(SIZE, DST, SRC, OFF) \
|
||||
((struct bpf_insn) { \
|
||||
.code = BPF_STX | BPF_SIZE(SIZE) | BPF_XADD, \
|
||||
.dst_reg = DST, \
|
||||
.src_reg = SRC, \
|
||||
.off = OFF, \
|
||||
.imm = 0 })
|
||||
|
||||
/* Memory store, *(uint *) (dst_reg + off16) = imm32 */
|
||||
|
||||
#define BPF_ST_MEM(SIZE, DST, OFF, IMM) \
|
||||
((struct bpf_insn) { \
|
||||
.code = BPF_ST | BPF_SIZE(SIZE) | BPF_MEM, \
|
||||
.dst_reg = DST, \
|
||||
.src_reg = 0, \
|
||||
.off = OFF, \
|
||||
.imm = IMM })
|
||||
|
||||
/* Conditional jumps against registers, if (dst_reg 'op' src_reg) goto pc + off16 */
|
||||
|
||||
#define BPF_JMP_REG(OP, DST, SRC, OFF) \
|
||||
((struct bpf_insn) { \
|
||||
.code = BPF_JMP | BPF_OP(OP) | BPF_X, \
|
||||
.dst_reg = DST, \
|
||||
.src_reg = SRC, \
|
||||
.off = OFF, \
|
||||
.imm = 0 })
|
||||
|
||||
/* Conditional jumps against immediates, if (dst_reg 'op' imm32) goto pc + off16 */
|
||||
|
||||
#define BPF_JMP_IMM(OP, DST, IMM, OFF) \
|
||||
((struct bpf_insn) { \
|
||||
.code = BPF_JMP | BPF_OP(OP) | BPF_K, \
|
||||
.dst_reg = DST, \
|
||||
.src_reg = 0, \
|
||||
.off = OFF, \
|
||||
.imm = IMM })
|
||||
|
||||
/* Raw code statement block */
|
||||
|
||||
#define BPF_RAW_INSN(CODE, DST, SRC, OFF, IMM) \
|
||||
((struct bpf_insn) { \
|
||||
.code = CODE, \
|
||||
.dst_reg = DST, \
|
||||
.src_reg = SRC, \
|
||||
.off = OFF, \
|
||||
.imm = IMM })
|
||||
|
||||
/* Program exit */
|
||||
|
||||
#define BPF_EXIT_INSN() \
|
||||
((struct bpf_insn) { \
|
||||
.code = BPF_JMP | BPF_EXIT, \
|
||||
.dst_reg = 0, \
|
||||
.src_reg = 0, \
|
||||
.off = 0, \
|
||||
.imm = 0 })
|
||||
|
||||
#endif
|
Loading…
Reference in a new issue