forked from Minki/linux
0bb9349017
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>
123 lines
3.5 KiB
C
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
|