From mboxrd@z Thu Jan 1 00:00:00 1970 From: Daniel Borkmann Subject: [PATCH bpf-next 04/11] bpf: show prog and map id in fdinfo Date: Mon, 28 May 2018 02:43:37 +0200 Message-ID: <20180528004344.3606-5-daniel@iogearbox.net> References: <20180528004344.3606-1-daniel@iogearbox.net> Cc: netdev@vger.kernel.org, Daniel Borkmann To: ast@kernel.org Return-path: Received: from www62.your-server.de ([213.133.104.62]:55448 "EHLO www62.your-server.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752742AbeE1AoF (ORCPT ); Sun, 27 May 2018 20:44:05 -0400 In-Reply-To: <20180528004344.3606-1-daniel@iogearbox.net> Sender: netdev-owner@vger.kernel.org List-ID: 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: Daniel Borkmann Acked-by: Alexei Starovoitov --- kernel/bpf/syscall.c | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-) diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c index 388d4fe..79341e8 100644 --- a/kernel/bpf/syscall.c +++ b/kernel/bpf/syscall.c @@ -326,13 +326,15 @@ 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", @@ -1069,11 +1071,13 @@ 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 -- 2.9.5