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bpf tools: Introduce accessors for struct bpf_program

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This patch introduces accessors for user of libbpf to retrieve section
name and fd of a opened/loaded eBPF program. 'struct bpf_prog_handler'
is used for that purpose. Accessors of programs section name and file
descriptor are provided. Set/get private data are also impelmented.

Signed-off-by: Wang Nan <wangnan0@huawei.com>
Acked-by: Alexei Starovoitov <ast@plumgrid.com>
Cc: Brendan Gregg <brendan.d.gregg@gmail.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: David Ahern <dsahern@gmail.com>
Cc: He Kuang <hekuang@huawei.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kaixu Xia <xiakaixu@huawei.com>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Zefan Li <lizefan@huawei.com>
Link: http://lkml.kernel.org/r/1435716878-189507-21-git-send-email-wangnan0@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Wang Nan
2015-07-01 02:14:08 +00:00
committed by Arnaldo Carvalho de Melo
parent 55cffde2e1
commit aa9b1ac33c
2 changed files with 96 additions and 0 deletions
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24
tools/lib/bpf/libbpf.h
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@@ -9,6 +9,7 @@
#define __BPF_LIBBPF_H
#include <stdio.h>
#include <stdbool.h>
/*
* In include/linux/compiler-gcc.h, __printf is defined. However
@@ -34,6 +35,29 @@ void bpf_object__close(struct bpf_object *object);
int bpf_object__load(struct bpf_object *obj);
int bpf_object__unload(struct bpf_object *obj);
/* Accessors of bpf_program. */
struct bpf_program;
struct bpf_program *bpf_program__next(struct bpf_program *prog,
struct bpf_object *obj);
#define bpf_object__for_each_program(pos, obj) \
for ((pos) = bpf_program__next(NULL, (obj)); \
(pos) != NULL; \
(pos) = bpf_program__next((pos), (obj)))
typedef void (*bpf_program_clear_priv_t)(struct bpf_program *,
void *);
int bpf_program__set_private(struct bpf_program *prog, void *priv,
bpf_program_clear_priv_t clear_priv);
int bpf_program__get_private(struct bpf_program *prog,
void **ppriv);
const char *bpf_program__title(struct bpf_program *prog, bool dup);
int bpf_program__fd(struct bpf_program *prog);
/*
* We don't need __attribute__((packed)) now since it is
* unnecessary for 'bpf_map_def' because they are all aligned.