1 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2 // Copyright (C) 2020 Facebook
10 #include <bpf/libbpf.h>
14 static int do_pin(int argc, char **argv)
16 DECLARE_LIBBPF_OPTS(bpf_iter_attach_opts, iter_opts);
17 union bpf_iter_link_info linfo;
18 const char *objfile, *path;
19 struct bpf_program *prog;
20 struct bpf_object *obj;
21 struct bpf_link *link;
22 int err = -1, map_fd = -1;
30 /* optional arguments */
32 if (is_prefix(*argv, "map")) {
36 p_err("incorrect map spec");
40 map_fd = map_parse_fd(&argc, &argv);
44 memset(&linfo, 0, sizeof(linfo));
45 linfo.map.map_fd = map_fd;
46 iter_opts.link_info = &linfo;
47 iter_opts.link_info_len = sizeof(linfo);
51 obj = bpf_object__open(objfile);
54 p_err("can't open objfile %s", objfile);
58 err = bpf_object__load(obj);
60 p_err("can't load objfile %s", objfile);
64 prog = bpf_object__next_program(obj, NULL);
67 p_err("can't find bpf program in objfile %s", objfile);
71 link = bpf_program__attach_iter(prog, &iter_opts);
74 p_err("attach_iter failed for program %s",
75 bpf_program__name(prog));
79 err = mount_bpffs_for_pin(path, false);
83 err = bpf_link__pin(link, path);
85 p_err("pin_iter failed for program %s to path %s",
86 bpf_program__name(prog), path);
91 bpf_link__destroy(link);
93 bpf_object__close(obj);
100 static int do_help(int argc, char **argv)
103 "Usage: %1$s %2$s pin OBJ PATH [map MAP]\n"
106 " " HELP_SPEC_MAP "\n"
107 " " HELP_SPEC_OPTIONS " }\n"
114 static const struct cmd cmds[] = {
120 int do_iter(int argc, char **argv)
122 return cmd_select(cmds, argc, argv, do_help);