netdev - [PATCH bpf 2/6] libbpf: complete list of strings for guessing program type

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Date:   Wed,  7 Feb 2018 20:27:13 -0800
From:   Jakub Kicinski <jakub.kicinski@...ronome.com>
To:     alexei.starovoitov@...il.com, daniel@...earbox.net
Cc:     netdev@...r.kernel.org, oss-drivers@...ronome.com,
        Quentin Monnet <quentin.monnet@...ronome.com>
Subject: [PATCH bpf 2/6] libbpf: complete list of strings for guessing program type

From: Quentin Monnet <quentin.monnet@...ronome.com>

It seems that the type guessing feature for libbpf, based on the name of
the ELF section the program is located in, was inspired from
samples/bpf/prog_load.c, which was not used by any sample for loading
programs of certain types such as TC actions and classifiers, or
LWT-related types. As a consequence, libbpf is not able to guess the
type of such programs and to load them automatically if type is not
provided to the `bpf_load_prog()` function.

Add ELF section names associated to those eBPF program types so that
they can be loaded with e.g. bpftool as well.

Signed-off-by: Quentin Monnet <quentin.monnet@...ronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@...ronome.com>
---
 tools/lib/bpf/libbpf.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index 71ddc481f349..c64840365433 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -1816,12 +1816,17 @@ static const struct {
 	BPF_PROG_SEC("socket",		BPF_PROG_TYPE_SOCKET_FILTER),
 	BPF_PROG_SEC("kprobe/",		BPF_PROG_TYPE_KPROBE),
 	BPF_PROG_SEC("kretprobe/",	BPF_PROG_TYPE_KPROBE),
+	BPF_PROG_SEC("classifier",	BPF_PROG_TYPE_SCHED_CLS),
+	BPF_PROG_SEC("action",		BPF_PROG_TYPE_SCHED_ACT),
 	BPF_PROG_SEC("tracepoint/",	BPF_PROG_TYPE_TRACEPOINT),
 	BPF_PROG_SEC("xdp",		BPF_PROG_TYPE_XDP),
 	BPF_PROG_SEC("perf_event",	BPF_PROG_TYPE_PERF_EVENT),
 	BPF_PROG_SEC("cgroup/skb",	BPF_PROG_TYPE_CGROUP_SKB),
 	BPF_PROG_SEC("cgroup/sock",	BPF_PROG_TYPE_CGROUP_SOCK),
 	BPF_PROG_SEC("cgroup/dev",	BPF_PROG_TYPE_CGROUP_DEVICE),
+	BPF_PROG_SEC("lwt_in",		BPF_PROG_TYPE_LWT_IN),
+	BPF_PROG_SEC("lwt_out",		BPF_PROG_TYPE_LWT_OUT),
+	BPF_PROG_SEC("lwt_xmit",	BPF_PROG_TYPE_LWT_XMIT),
 	BPF_PROG_SEC("sockops",		BPF_PROG_TYPE_SOCK_OPS),
 	BPF_PROG_SEC("sk_skb",		BPF_PROG_TYPE_SK_SKB),
 };
-- 
2.15.1