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/*
* bpf-loader.c
*
* Copyright (C) 2015 Wang Nan <wangnan0@huawei.com>
* Copyright (C) 2015 Huawei Inc.
*/
#include <bpf/libbpf.h>
#include <linux/err.h>
#include "perf.h"
#include "debug.h"
#include "bpf-loader.h"
#define DEFINE_PRINT_FN(name, level) \
static int libbpf_##name(const char *fmt, ...) \
{ \
va_list args; \
int ret; \
\
va_start(args, fmt); \
ret = veprintf(level, verbose, pr_fmt(fmt), args);\
va_end(args); \
return ret; \
}
DEFINE_PRINT_FN(warning, 0)
DEFINE_PRINT_FN(info, 0)
DEFINE_PRINT_FN(debug, 1)
struct bpf_object *bpf__prepare_load(const char *filename)
{
struct bpf_object *obj;
static bool libbpf_initialized;
if (!libbpf_initialized) {
libbpf_set_print(libbpf_warning,
libbpf_info,
libbpf_debug);
libbpf_initialized = true;
}
obj = bpf_object__open(filename);
if (!obj) {
pr_debug("bpf: failed to load %s\n", filename);
return ERR_PTR(-EINVAL);
}
return obj;
}
void bpf__clear(void)
{
struct bpf_object *obj, *tmp;
bpf_object__for_each_safe(obj, tmp)
bpf_object__close(obj);
}
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