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Commit 4316b409 authored by Daniel Borkmann's avatar Daniel Borkmann Committed by Alexei Starovoitov
Browse files

bpf: show prog and map id in fdinfo 



Its trivial and straight forward to expose it for scripts that can
then use it along with bpftool in order to inspect an individual
application's used maps and progs. Right now we dump some basic
information in the fdinfo file but with the help of the map/prog
id full introspection becomes possible now.

Signed-off-by: default avatarDaniel Borkmann <daniel@iogearbox.net>
Acked-by: default avatarAlexei Starovoitov <ast@kernel.org>
Acked-by: default avatarSong Liu <songliubraving@fb.com>
Acked-by: default avatarJesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
parent 3fe2867c

kernel/bpf/syscall.c

+8 −4
Original line number Diff line number Diff line
@@ -327,13 +327,15 @@ static void bpf_map_show_fdinfo(struct seq_file *m, struct file *filp) 
		   "value_size:\t%u\n"

		   "max_entries:\t%u\n"

		   "map_flags:\t%#x\n"

		   "memlock:\t%llu\n",

		   "memlock:\t%llu\n"

		   "map_id:\t%u\n",

		   map->map_type,

		   map->key_size,

		   map->value_size,

		   map->max_entries,

		   map->map_flags,

		   map->pages * 1ULL << PAGE_SHIFT);

		   map->pages * 1ULL << PAGE_SHIFT,

		   map->id);



	if (owner_prog_type) {

		seq_printf(m, "owner_prog_type:\t%u\n",
@@ -1070,11 +1072,13 @@ static void bpf_prog_show_fdinfo(struct seq_file *m, struct file *filp) 
		   "prog_type:\t%u\n"

		   "prog_jited:\t%u\n"

		   "prog_tag:\t%s\n"

		   "memlock:\t%llu\n",

		   "memlock:\t%llu\n"

		   "prog_id:\t%u\n",

		   prog->type,

		   prog->jited,

		   prog_tag,

		   prog->pages * 1ULL << PAGE_SHIFT);

		   prog->pages * 1ULL << PAGE_SHIFT,

		   prog->aux->id);

}

#endif