bpf: Add module name [bpf] to ksymbols for bpf programs

With this patch, /proc/kallsyms will show BPF programs as

  <addr> t bpf_prog_<tag>_<name> [bpf]

Signed-off-by: Song Liu <songliubraving@fb.com>
Reviewed-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: kernel-team@fb.com
Cc: netdev@vger.kernel.org
Link: http://lkml.kernel.org/r/20190117161521.1341602-10-songliubraving@fb.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/kernel/kallsyms.c b/kernel/kallsyms.c
index f3a04994e0637c1180db334c582859f988fdfb3d..14934afa9e68bf9dd8ae2a497da412f25c253d55 100644 (file)
--- a/kernel/kallsyms.c
+++ b/kernel/kallsyms.c
@@ -494,7 +494,7 @@ static int get_ksymbol_ftrace_mod(struct kallsym_iter *iter)
 
 static int get_ksymbol_bpf(struct kallsym_iter *iter)
 {
-       iter->module_name[0] = '\0';
+       strlcpy(iter->module_name, "bpf", MODULE_NAME_LEN);
        iter->exported = 0;
        return bpf_get_kallsym(iter->pos - iter->pos_ftrace_mod_end,
                               &iter->value, &iter->type,