GEN COMMANDS
=============
-| **bpftool** **gen skeleton** *FILE*
+| **bpftool** **gen skeleton** *FILE* [**name** *OBJECT_NAME*]
| **bpftool** **gen help**
DESCRIPTION
specific maps, programs, etc.
As part of skeleton, few custom functions are generated.
- Each of them is prefixed with object name, derived from
- object file name. I.e., if BPF object file name is
- **example.o**, BPF object name will be **example**. The
- following custom functions are provided in such case:
+ Each of them is prefixed with object name. Object name can
+ either be derived from object file name, i.e., if BPF object
+ file name is **example.o**, BPF object name will be
+ **example**. Object name can be also specified explicitly
+ through **name** *OBJECT_NAME* parameter. The following
+ custom functions are provided (assuming **example** as
+ the object name):
- **example__open** and **example__open_opts**.
These functions are used to instantiate skeleton. It
char header_guard[MAX_OBJ_NAME_LEN + sizeof("__SKEL_H__")];
size_t i, map_cnt = 0, prog_cnt = 0, file_sz, mmap_sz;
DECLARE_LIBBPF_OPTS(bpf_object_open_opts, opts);
- char obj_name[MAX_OBJ_NAME_LEN], *obj_data;
+ char obj_name[MAX_OBJ_NAME_LEN] = "", *obj_data;
struct bpf_object *obj = NULL;
const char *file, *ident;
struct bpf_program *prog;
}
file = GET_ARG();
+ while (argc) {
+ if (!REQ_ARGS(2))
+ return -1;
+
+ if (is_prefix(*argv, "name")) {
+ NEXT_ARG();
+
+ if (obj_name[0] != '\0') {
+ p_err("object name already specified");
+ return -1;
+ }
+
+ strncpy(obj_name, *argv, MAX_OBJ_NAME_LEN - 1);
+ obj_name[MAX_OBJ_NAME_LEN - 1] = '\0';
+ } else {
+ p_err("unknown arg %s", *argv);
+ return -1;
+ }
+
+ NEXT_ARG();
+ }
+
if (argc) {
p_err("extra unknown arguments");
return -1;
p_err("failed to mmap() %s: %s", file, strerror(errno));
goto out;
}
- get_obj_name(obj_name, file);
+ if (obj_name[0] == '\0')
+ get_obj_name(obj_name, file);
opts.object_name = obj_name;
obj = bpf_object__open_mem(obj_data, file_sz, &opts);
if (IS_ERR(obj)) {
}
fprintf(stderr,
- "Usage: %1$s %2$s skeleton FILE\n"
+ "Usage: %1$s %2$s skeleton FILE [name OBJECT_NAME]\n"
" %1$s %2$s help\n"
"\n"
" " HELP_SPEC_OPTIONS "\n"