linux-kernel - [PATCH bpf-next] samples/bpf: Fix sockex3: missing BPF prog type

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Date:   Sat, 29 Oct 2022 15:53:12 +0800
From:   Rong Tao <rtoax@...mail.com>
To:     andrii.nakryiko@...il.com
Cc:     andrii@...nel.org, ast@...nel.org, bpf@...r.kernel.org,
        daniel@...earbox.net, haoluo@...gle.com, john.fastabend@...il.com,
        jolsa@...nel.org, kpsingh@...nel.org, linux-kernel@...r.kernel.org,
        martin.lau@...ux.dev, rongtao@...tc.cn, rtoax@...mail.com,
        sdf@...gle.com, song@...nel.org, yhs@...com
Subject: [PATCH bpf-next] samples/bpf: Fix sockex3: missing BPF prog type

From: Rong Tao <rongtao@...tc.cn>

since commit 450b167fb9be("libbpf: clean up SEC() handling"),
sec_def_matches() does not recognize "socket/xxx" as "socket", therefore,
the BPF program type is not recognized, set "socket/xxx" to SOCKET_FILTER
solves this error.

 $ cd samples/bpf
 $ sudo ./sockex3
 libbpf: prog 'bpf_func_PARSE_IP': missing BPF prog type, check ELF section name 'socket/3'
 libbpf: prog 'bpf_func_PARSE_IP': failed to load: -22
 libbpf: failed to load object './sockex3_kern.o'
 ERROR: loading BPF object file failed

Signed-off-by: Rong Tao <rongtao@...tc.cn>
---
 samples/bpf/sockex3_user.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/samples/bpf/sockex3_user.c b/samples/bpf/sockex3_user.c
index cd6fa79df900..dc79c17ad195 100644
--- a/samples/bpf/sockex3_user.c
+++ b/samples/bpf/sockex3_user.c
@@ -39,6 +39,9 @@ int main(int argc, char **argv)
 		return 0;
 	}
 
+	bpf_object__for_each_program(prog, obj)
+		bpf_program__set_type(prog, BPF_PROG_TYPE_SOCKET_FILTER);
+
 	/* load BPF program */
 	if (bpf_object__load(obj)) {
 		fprintf(stderr, "ERROR: loading BPF object file failed\n");
-- 
2.31.1