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/*
* Copyright (C) 2015, Wang Nan <wangnan0@huawei.com>
* Copyright (C) 2015, Huawei Inc.
*/
#ifndef __BPF_LOADER_H
#define __BPF_LOADER_H
#include <linux/compiler.h>
#include <linux/err.h>
#include <string.h>
#include "debug.h"
struct bpf_object;
#define PERF_BPF_PROBE_GROUP "perf_bpf_probe"
#ifdef HAVE_LIBBPF_SUPPORT
struct bpf_object *bpf__prepare_load(const char *filename);
void bpf__clear(void);
int bpf__probe(struct bpf_object *obj);
int bpf__unprobe(struct bpf_object *obj);
int bpf__strerror_probe(struct bpf_object *obj, int err,
char *buf, size_t size);
int bpf__load(struct bpf_object *obj);
int bpf__strerror_load(struct bpf_object *obj, int err,
char *buf, size_t size);
#else
static inline struct bpf_object *
bpf__prepare_load(const char *filename __maybe_unused)
{
pr_debug("ERROR: eBPF object loading is disabled during compiling.\n");
return ERR_PTR(-ENOTSUP);
}
static inline void bpf__clear(void) { }
static inline int bpf__probe(struct bpf_object *obj __maybe_unused) { return 0;}
static inline int bpf__unprobe(struct bpf_object *obj __maybe_unused) { return 0;}
static inline int bpf__load(struct bpf_object *obj __maybe_unused) { return 0; }
static inline int
__bpf_strerror(char *buf, size_t size)
{
if (!size)
return 0;
strncpy(buf,
"ERROR: eBPF object loading is disabled during compiling.\n",
size);
buf[size - 1] = '\0';
return 0;
}
static inline int
bpf__strerror_probe(struct bpf_object *obj __maybe_unused,
int err __maybe_unused,
char *buf, size_t size)
{
return __bpf_strerror(buf, size);
}
static inline int bpf__strerror_load(struct bpf_object *obj __maybe_unused,
int err __maybe_unused,
char *buf, size_t size)
{
return __bpf_strerror(buf, size);
}
#endif
#endif
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