linux-kernel - [PATCH bpf-next v2] selftests/bpf: Fix error: undeclared identifier 'NF_NAT_MANIP

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Date:   Fri, 18 Nov 2022 17:38:24 +0800
From:   Rong Tao <rtoax@...mail.com>
To:     andrii.nakryiko@...il.com, sdf@...gle.com
Cc:     andrii@...nel.org, ast@...nel.org, bpf@...r.kernel.org,
        daniel@...earbox.net, dxu@...uu.xyz, haoluo@...gle.com,
        john.fastabend@...il.com, jolsa@...nel.org, kpsingh@...nel.org,
        linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org,
        lkp@...el.com, lorenzo@...nel.org, martin.lau@...ux.dev,
        memxor@...il.com, mykolal@...com, rongtao@...tc.cn,
        rtoax@...mail.com, shuah@...nel.org, song@...nel.org, yhs@...com
Subject: [PATCH bpf-next v2] selftests/bpf: Fix error: undeclared identifier 'NF_NAT_MANIP_SRC'

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

commit 472caa69183f("netfilter: nat: un-export nf_nat_used_tuple")
introduce NF_NAT_MANIP_SRC/DST enum in include/net/netfilter/nf_nat.h,
and commit b06b45e82b59("selftests/bpf: add tests for bpf_ct_set_nat_info
kfunc") use NF_NAT_MANIP_SRC/DST in test_bpf_nf.c.

In bpf kself-test config (tools/testing/selftests/bpf/config) nf_nat
is compiled as built-in, this issue occurs just if it is compiled as
module. we just hardcode 1/0 here.

How to reproduce the error:

   $ make -C tools/testing/selftests/bpf/
   ...
      CLNG-BPF [test_maps] test_bpf_nf.bpf.o
      error: use of undeclared identifier 'NF_NAT_MANIP_SRC'
            bpf_ct_set_nat_info(ct, &saddr, sport, NF_NAT_MANIP_SRC);
                                                         ^
      error: use of undeclared identifier 'NF_NAT_MANIP_DST'
            bpf_ct_set_nat_info(ct, &daddr, dport, NF_NAT_MANIP_DST);
                                                         ^
   2 errors generated.

Signed-off-by: Rong Tao <rongtao@...tc.cn>
---
 tools/testing/selftests/bpf/progs/test_bpf_nf.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/testing/selftests/bpf/progs/test_bpf_nf.c b/tools/testing/selftests/bpf/progs/test_bpf_nf.c
index 227e85e85dda..075cd9b31d76 100644
--- a/tools/testing/selftests/bpf/progs/test_bpf_nf.c
+++ b/tools/testing/selftests/bpf/progs/test_bpf_nf.c
@@ -157,10 +157,10 @@ nf_ct_test(struct nf_conn *(*lookup_fn)(void *, struct bpf_sock_tuple *, u32,
 
 		/* snat */
 		saddr.ip = bpf_get_prandom_u32();
-		bpf_ct_set_nat_info(ct, &saddr, sport, NF_NAT_MANIP_SRC);
+		bpf_ct_set_nat_info(ct, &saddr, sport, 0 /*NF_NAT_MANIP_SRC*/);
 		/* dnat */
 		daddr.ip = bpf_get_prandom_u32();
-		bpf_ct_set_nat_info(ct, &daddr, dport, NF_NAT_MANIP_DST);
+		bpf_ct_set_nat_info(ct, &daddr, dport, 1 /*NF_NAT_MANIP_DST*/);
 
 		ct_ins = bpf_ct_insert_entry(ct);
 		if (ct_ins) {
-- 
2.31.1