bpf.h

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// Copyright (c) Microsoft Corporation
// SPDX-License-Identifier: MIT
#pragma once
 
 
#include "ebpf_structs.h"
 
#include <stdint.h>
 
#ifdef _MSC_VER
// This file is being included by a user-mode Windows application.
#include "ebpf_api.h"
#include "ebpf_program_types.h"
#define LIBBPF_API
#include "libbpf/src/libbpf_common.h"
#undef LIBBPF_DEPRECATED
#define LIBBPF_DEPRECATED(x)
#else
// This file is being included by an eBPF program.
typedef int32_t s32;
typedef uint8_t u8;
typedef uint32_t u32;
typedef uint64_t u64;
#endif
 
#define __SIZEOF_SIZE_T__ 8    /* only x64 is supported */
#define __SIZEOF_LONG_LONG__ 8 /* only x64 is supported */
 
typedef int32_t __s32;
 
typedef uint8_t __u8;
typedef uint32_t __u32;
typedef uint64_t __u64;
typedef uint32_t pid_t;
 
enum bpf_func_id
{
    BPF_FUNC_ID_UNKNOWN
};
 
enum bpf_stats_type
{
    BPF_STATS_TYPE_UNKNOWN
};
 
enum bpf_cmd_id
{
    BPF_MAP_CREATE,
    BPF_MAP_LOOKUP_ELEM,
    BPF_MAP_UPDATE_ELEM,
    BPF_MAP_DELETE_ELEM,
    BPF_MAP_GET_NEXT_KEY,
    BPF_PROG_LOAD,
    BPF_OBJ_PIN,
    BPF_OBJ_GET,
    BPF_PROG_ATTACH,
    BPF_PROG_DETACH,
    BPF_PROG_GET_NEXT_ID,
    BPF_MAP_GET_NEXT_ID,
    BPF_LINK_GET_NEXT_ID,
    BPF_PROG_GET_FD_BY_ID,
    BPF_MAP_GET_FD_BY_ID,
    BPF_MAP_LOOKUP_AND_DELETE_ELEM,
    BPF_LINK_GET_FD_BY_ID,
    BPF_OBJ_GET_INFO_BY_FD,
    BPF_LINK_DETACH,
    BPF_PROG_BIND_MAP,
    BPF_PROG_TEST_RUN,
    BPF_PROG_RUN = BPF_PROG_TEST_RUN,
};
 
typedef struct
{
    uint32_t bpf_fd; 
    uint64_t info;   
 
    uint32_t info_len;
} bpf_obj_info_attr_t;
 
typedef struct
{
    uint32_t link_fd; 
} bpf_link_detach_attr_t;
 
typedef struct
{
    uint32_t prog_fd; 
    uint32_t map_fd;  
    uint32_t flags;   
} bpf_prog_bind_map_attr_t;
 
#ifdef _MSC_VER
#pragma warning(push)
#pragma warning(disable : 4201) // nonstandard extension used: nameless struct/union
#endif
union bpf_attr
{
    // BPF_MAP_CREATE
    struct
    {
        enum bpf_map_type map_type; 
        uint32_t key_size;          
        uint32_t value_size;        
        uint32_t max_entries;       
        uint32_t map_flags;         
    };                              
 
    // BPF_MAP_LOOKUP_ELEM
    // BPF_MAP_UPDATE_ELEM
    // BPF_MAP_DELETE_ELEM
    // BPF_MAP_GET_NEXT_KEY
    struct
    {
        uint32_t map_fd; 
        uint64_t key;    
        union
        {
            uint64_t value;    
            uint64_t next_key; 
        };
        uint64_t flags; 
    }; 
 
    // BPF_PROG_LOAD
    struct
    {
        enum bpf_prog_type prog_type; 
        uint64_t insns;               
        uint32_t insn_cnt;            
        uint64_t license;      
        uint32_t log_level;    
        uint64_t log_buf;      
        uint32_t log_size;     
        uint32_t kern_version; 
    };                         
 
    // BPF_PROG_ATTACH
    // BPF_PROG_DETACH
    struct
    {
        uint32_t target_fd;               
        uint32_t attach_bpf_fd;           
        enum bpf_attach_type attach_type; 
        uint32_t attach_flags;            
    };                                    
 
    // BPF_OBJ_PIN
    // BPF_OBJ_GET
    struct
    {
        uint64_t pathname; 
        uint32_t bpf_fd;   
    };                     
 
    // BPF_PROG_GET_NEXT_ID
    // BPF_MAP_GET_NEXT_ID
    // BPF_LINK_GET_NEXT_ID
    struct
    {
        uint32_t start_id; 
        uint32_t next_id;  
    };                     
 
    // BPF_MAP_GET_FD_BY_ID
    uint32_t map_id; 
 
    // BPF_PROG_GET_FD_BY_ID
    uint32_t prog_id; 
 
    // BPF_LINK_GET_FD_BY_ID
    uint32_t link_id; 
 
    // BPF_OBJ_GET_INFO_BY_FD
    bpf_obj_info_attr_t info; 
 
    // BPF_LINK_DETACH
    bpf_link_detach_attr_t link_detach; 
 
    // BPF_PROG_BIND_MAP
    bpf_prog_bind_map_attr_t prog_bind_map; 
 
    // BPF_PROG_TEST_RUN
    struct
    {
        uint32_t prog_fd;       
        uint32_t retval;        
        uint32_t data_size_in;  
        uint32_t data_size_out; 
        uint64_t data_in;       
        uint64_t data_out;      
        uint32_t repeat;        
        uint32_t duration;      
        uint32_t ctx_size_in;   
        uint32_t ctx_size_out;  
        uint64_t ctx_in;        
        uint64_t ctx_out;       
        uint32_t flags;         
        uint32_t cpu;           
        uint32_t batch_size;    
    } test;                     
};
#ifdef _MSC_VER
#pragma warning(pop)
#endif
 
int
bpf(int cmd, union bpf_attr* attr, unsigned int size);