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linux-next/tools/perf/util/bpf-loader.h
Wang Nan 0bb9349017 perf bpf: Rename bpf config to program config
Following patches are going to introduce BPF object level configuration
to enable setting values into BPF maps. To avoid confusion, this patch
renames existing 'config' in bpf-loader.c to 'program config'. Following
patches would introduce 'object config'.

Signed-off-by: Wang Nan <wangnan0@huawei.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Zefan Li <lizefan@huawei.com>
Cc: pi3orama@163.com
Link: http://lkml.kernel.org/r/1448614067-197576-4-git-send-email-wangnan0@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-11-27 22:00:46 -03:00

123 lines
3.5 KiB
C

/*
* 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 <bpf/libbpf.h>
#include "probe-event.h"
#include "debug.h"
enum bpf_loader_errno {
__BPF_LOADER_ERRNO__START = __LIBBPF_ERRNO__START - 100,
/* Invalid config string */
BPF_LOADER_ERRNO__CONFIG = __BPF_LOADER_ERRNO__START,
BPF_LOADER_ERRNO__GROUP, /* Invalid group name */
BPF_LOADER_ERRNO__EVENTNAME, /* Event name is missing */
BPF_LOADER_ERRNO__INTERNAL, /* BPF loader internal error */
BPF_LOADER_ERRNO__COMPILE, /* Error when compiling BPF scriptlet */
BPF_LOADER_ERRNO__PROGCONF_TERM,/* Invalid program config term in config string */
BPF_LOADER_ERRNO__PROLOGUE, /* Failed to generate prologue */
BPF_LOADER_ERRNO__PROLOGUE2BIG, /* Prologue too big for program */
BPF_LOADER_ERRNO__PROLOGUEOOB, /* Offset out of bound for prologue */
__BPF_LOADER_ERRNO__END,
};
struct bpf_object;
#define PERF_BPF_PROBE_GROUP "perf_bpf_probe"
typedef int (*bpf_prog_iter_callback_t)(struct probe_trace_event *tev,
int fd, void *arg);
#ifdef HAVE_LIBBPF_SUPPORT
struct bpf_object *bpf__prepare_load(const char *filename, bool source);
int bpf__strerror_prepare_load(const char *filename, bool source,
int err, char *buf, size_t size);
struct bpf_object *bpf__prepare_load_buffer(void *obj_buf, size_t obj_buf_sz,
const char *name);
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);
int bpf__foreach_tev(struct bpf_object *obj,
bpf_prog_iter_callback_t func, void *arg);
#else
static inline struct bpf_object *
bpf__prepare_load(const char *filename __maybe_unused,
bool source __maybe_unused)
{
pr_debug("ERROR: eBPF object loading is disabled during compiling.\n");
return ERR_PTR(-ENOTSUP);
}
static inline struct bpf_object *
bpf__prepare_load_buffer(void *obj_buf __maybe_unused,
size_t obj_buf_sz __maybe_unused)
{
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__foreach_tev(struct bpf_object *obj __maybe_unused,
bpf_prog_iter_callback_t func __maybe_unused,
void *arg __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_prepare_load(const char *filename __maybe_unused,
bool source __maybe_unused,
int err __maybe_unused,
char *buf, size_t size)
{
return __bpf_strerror(buf, size);
}
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