mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-10-31 08:28:13 +00:00
89 lines
1.6 KiB
C
89 lines
1.6 KiB
C
|
// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
|
||
|
// Copyright (C) 2020 Facebook
|
||
|
|
||
|
#define _GNU_SOURCE
|
||
|
#include <linux/err.h>
|
||
|
#include <bpf/libbpf.h>
|
||
|
|
||
|
#include "main.h"
|
||
|
|
||
|
static int do_pin(int argc, char **argv)
|
||
|
{
|
||
|
const char *objfile, *path;
|
||
|
struct bpf_program *prog;
|
||
|
struct bpf_object *obj;
|
||
|
struct bpf_link *link;
|
||
|
int err;
|
||
|
|
||
|
if (!REQ_ARGS(2))
|
||
|
usage();
|
||
|
|
||
|
objfile = GET_ARG();
|
||
|
path = GET_ARG();
|
||
|
|
||
|
obj = bpf_object__open(objfile);
|
||
|
if (IS_ERR(obj)) {
|
||
|
p_err("can't open objfile %s", objfile);
|
||
|
return -1;
|
||
|
}
|
||
|
|
||
|
err = bpf_object__load(obj);
|
||
|
if (err) {
|
||
|
p_err("can't load objfile %s", objfile);
|
||
|
goto close_obj;
|
||
|
}
|
||
|
|
||
|
prog = bpf_program__next(NULL, obj);
|
||
|
if (!prog) {
|
||
|
p_err("can't find bpf program in objfile %s", objfile);
|
||
|
goto close_obj;
|
||
|
}
|
||
|
|
||
|
link = bpf_program__attach_iter(prog, NULL);
|
||
|
if (IS_ERR(link)) {
|
||
|
err = PTR_ERR(link);
|
||
|
p_err("attach_iter failed for program %s",
|
||
|
bpf_program__name(prog));
|
||
|
goto close_obj;
|
||
|
}
|
||
|
|
||
|
err = mount_bpffs_for_pin(path);
|
||
|
if (err)
|
||
|
goto close_link;
|
||
|
|
||
|
err = bpf_link__pin(link, path);
|
||
|
if (err) {
|
||
|
p_err("pin_iter failed for program %s to path %s",
|
||
|
bpf_program__name(prog), path);
|
||
|
goto close_link;
|
||
|
}
|
||
|
|
||
|
close_link:
|
||
|
bpf_link__destroy(link);
|
||
|
close_obj:
|
||
|
bpf_object__close(obj);
|
||
|
return err;
|
||
|
}
|
||
|
|
||
|
static int do_help(int argc, char **argv)
|
||
|
{
|
||
|
fprintf(stderr,
|
||
|
"Usage: %s %s pin OBJ PATH\n"
|
||
|
" %s %s help\n"
|
||
|
"\n",
|
||
|
bin_name, argv[-2], bin_name, argv[-2]);
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static const struct cmd cmds[] = {
|
||
|
{ "help", do_help },
|
||
|
{ "pin", do_pin },
|
||
|
{ 0 }
|
||
|
};
|
||
|
|
||
|
int do_iter(int argc, char **argv)
|
||
|
{
|
||
|
return cmd_select(cmds, argc, argv, do_help);
|
||
|
}
|