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1// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2// Copyright (C) 2020 Facebook
3
4#define _GNU_SOURCE
5#include <unistd.h>
6#include <linux/err.h>
7#include <bpf/libbpf.h>
8
9#include "main.h"
10
11static int do_pin(int argc, char **argv)
12{
13 DECLARE_LIBBPF_OPTS(bpf_iter_attach_opts, iter_opts);
14 union bpf_iter_link_info linfo;
15 const char *objfile, *path;
16 struct bpf_program *prog;
17 struct bpf_object *obj;
18 struct bpf_link *link;
19 int err = -1, map_fd = -1;
20
21 if (!REQ_ARGS(2))
22 usage();
23
24 objfile = GET_ARG();
25 path = GET_ARG();
26
27 /* optional arguments */
28 if (argc) {
29 if (is_prefix(*argv, "map")) {
30 NEXT_ARG();
31
32 if (!REQ_ARGS(2)) {
33 p_err("incorrect map spec");
34 return -1;
35 }
36
37 map_fd = map_parse_fd(&argc, &argv);
38 if (map_fd < 0)
39 return -1;
40
41 memset(&linfo, 0, sizeof(linfo));
42 linfo.map.map_fd = map_fd;
43 iter_opts.link_info = &linfo;
44 iter_opts.link_info_len = sizeof(linfo);
45 }
46 }
47
48 obj = bpf_object__open(objfile);
49 if (IS_ERR(obj)) {
50 p_err("can't open objfile %s", objfile);
51 goto close_map_fd;
52 }
53
54 err = bpf_object__load(obj);
55 if (err) {
56 p_err("can't load objfile %s", objfile);
57 goto close_obj;
58 }
59
60 prog = bpf_program__next(NULL, obj);
61 if (!prog) {
62 p_err("can't find bpf program in objfile %s", objfile);
63 goto close_obj;
64 }
65
66 link = bpf_program__attach_iter(prog, &iter_opts);
67 if (IS_ERR(link)) {
68 err = PTR_ERR(link);
69 p_err("attach_iter failed for program %s",
70 bpf_program__name(prog));
71 goto close_obj;
72 }
73
74 err = mount_bpffs_for_pin(path);
75 if (err)
76 goto close_link;
77
78 err = bpf_link__pin(link, path);
79 if (err) {
80 p_err("pin_iter failed for program %s to path %s",
81 bpf_program__name(prog), path);
82 goto close_link;
83 }
84
85close_link:
86 bpf_link__destroy(link);
87close_obj:
88 bpf_object__close(obj);
89close_map_fd:
90 if (map_fd >= 0)
91 close(map_fd);
92 return err;
93}
94
95static int do_help(int argc, char **argv)
96{
97 fprintf(stderr,
98 "Usage: %1$s %2$s pin OBJ PATH [map MAP]\n"
99 " %1$s %2$s help\n"
100 " " HELP_SPEC_MAP "\n"
101 "",
102 bin_name, "iter");
103
104 return 0;
105}
106
107static const struct cmd cmds[] = {
108 { "help", do_help },
109 { "pin", do_pin },
110 { 0 }
111};
112
113int do_iter(int argc, char **argv)
114{
115 return cmd_select(cmds, argc, argv, do_help);
116}
1// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2// Copyright (C) 2020 Facebook
3
4#define _GNU_SOURCE
5#include <unistd.h>
6#include <linux/err.h>
7#include <bpf/libbpf.h>
8
9#include "main.h"
10
11static int do_pin(int argc, char **argv)
12{
13 DECLARE_LIBBPF_OPTS(bpf_iter_attach_opts, iter_opts);
14 union bpf_iter_link_info linfo;
15 const char *objfile, *path;
16 struct bpf_program *prog;
17 struct bpf_object *obj;
18 struct bpf_link *link;
19 int err = -1, map_fd = -1;
20
21 if (!REQ_ARGS(2))
22 usage();
23
24 objfile = GET_ARG();
25 path = GET_ARG();
26
27 /* optional arguments */
28 if (argc) {
29 if (is_prefix(*argv, "map")) {
30 NEXT_ARG();
31
32 if (!REQ_ARGS(2)) {
33 p_err("incorrect map spec");
34 return -1;
35 }
36
37 map_fd = map_parse_fd(&argc, &argv);
38 if (map_fd < 0)
39 return -1;
40
41 memset(&linfo, 0, sizeof(linfo));
42 linfo.map.map_fd = map_fd;
43 iter_opts.link_info = &linfo;
44 iter_opts.link_info_len = sizeof(linfo);
45 }
46 }
47
48 obj = bpf_object__open(objfile);
49 if (IS_ERR(obj)) {
50 p_err("can't open objfile %s", objfile);
51 goto close_map_fd;
52 }
53
54 err = bpf_object__load(obj);
55 if (err) {
56 p_err("can't load objfile %s", objfile);
57 goto close_obj;
58 }
59
60 prog = bpf_program__next(NULL, obj);
61 if (!prog) {
62 p_err("can't find bpf program in objfile %s", objfile);
63 goto close_obj;
64 }
65
66 link = bpf_program__attach_iter(prog, &iter_opts);
67 if (IS_ERR(link)) {
68 err = PTR_ERR(link);
69 p_err("attach_iter failed for program %s",
70 bpf_program__name(prog));
71 goto close_obj;
72 }
73
74 err = mount_bpffs_for_pin(path);
75 if (err)
76 goto close_link;
77
78 err = bpf_link__pin(link, path);
79 if (err) {
80 p_err("pin_iter failed for program %s to path %s",
81 bpf_program__name(prog), path);
82 goto close_link;
83 }
84
85close_link:
86 bpf_link__destroy(link);
87close_obj:
88 bpf_object__close(obj);
89close_map_fd:
90 if (map_fd >= 0)
91 close(map_fd);
92 return err;
93}
94
95static int do_help(int argc, char **argv)
96{
97 fprintf(stderr,
98 "Usage: %1$s %2$s pin OBJ PATH [map MAP]\n"
99 " %1$s %2$s help\n"
100 " " HELP_SPEC_MAP "\n"
101 "",
102 bin_name, "iter");
103
104 return 0;
105}
106
107static const struct cmd cmds[] = {
108 { "help", do_help },
109 { "pin", do_pin },
110 { 0 }
111};
112
113int do_iter(int argc, char **argv)
114{
115 return cmd_select(cmds, argc, argv, do_help);
116}