rte_bpf.h

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/* SPDX-License-Identifier: BSD-3-Clause
 * Copyright(c) 2018 Intel Corporation
 */

#ifndef _RTE_BPF_H_
#define _RTE_BPF_H_

#include <rte_common.h>
#include <rte_mbuf.h>
#include <bpf_def.h>

#ifdef __cplusplus
extern "C" {
#endif

enum rte_bpf_arg_type {
        RTE_BPF_ARG_UNDEF,      
        RTE_BPF_ARG_RAW,        
        RTE_BPF_ARG_PTR = 0x10, 
        RTE_BPF_ARG_PTR_MBUF,   
        RTE_BPF_ARG_PTR_STACK,
};

struct rte_bpf_arg {
        enum rte_bpf_arg_type type;
        size_t size;
        size_t buf_size;
};

#define RTE_BPF_ARG_PTR_TYPE(x) ((x) & RTE_BPF_ARG_PTR)

enum rte_bpf_xtype {
        RTE_BPF_XTYPE_FUNC, 
        RTE_BPF_XTYPE_VAR,  
        RTE_BPF_XTYPE_NUM
};

struct rte_bpf_xsym {
        const char *name;        
        enum rte_bpf_xtype type; 
        union {
                struct {
                        uint64_t (*val)(uint64_t, uint64_t, uint64_t,
                                uint64_t, uint64_t);
                        uint32_t nb_args;
                        struct rte_bpf_arg args[EBPF_FUNC_MAX_ARGS];
                        struct rte_bpf_arg ret; 
                } func;
                struct {
                        void *val; 
                        struct rte_bpf_arg desc; 
                } var; 
        };
};

struct rte_bpf_prm {
        const struct ebpf_insn *ins; 
        uint32_t nb_ins;            
        const struct rte_bpf_xsym *xsym;
        uint32_t nb_xsym; 
        struct rte_bpf_arg prog_arg; 
};

struct rte_bpf_jit {
        uint64_t (*func)(void *); 
        size_t sz;                
};

struct rte_bpf;

void __rte_experimental
rte_bpf_destroy(struct rte_bpf *bpf);

struct rte_bpf * __rte_experimental
rte_bpf_load(const struct rte_bpf_prm *prm);

struct rte_bpf * __rte_experimental
rte_bpf_elf_load(const struct rte_bpf_prm *prm, const char *fname,
                const char *sname);
uint64_t __rte_experimental
rte_bpf_exec(const struct rte_bpf *bpf, void *ctx);

uint32_t __rte_experimental
rte_bpf_exec_burst(const struct rte_bpf *bpf, void *ctx[], uint64_t rc[],
                uint32_t num);

int __rte_experimental
rte_bpf_get_jit(const struct rte_bpf *bpf, struct rte_bpf_jit *jit);

#ifdef __cplusplus
}
#endif

#endif /* _RTE_BPF_H_ */