[PATCH bpf 2/2] bpf: sockmap, add test for ingress through strparser

[John Fastabend <john.fastabend@gmail.com>]

Add an option to always return SK_PASS in the verdict callback
instead of redirecting the skb.  This allows testing cases
which are not covered by the test program as of now.

Signed-off-by: Vincent Whitchurch <vincent.whitchurch@datadoghq.com>
Signed-off-by: John Fastabend <john.fastabend@gmail.com>
---
 tools/testing/selftests/bpf/test_sockmap.c | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/bpf/test_sockmap.c b/tools/testing/selftests/bpf/test_sockmap.c
index 9cba4ec844a5..cc3e4d96c8ac 100644
--- a/tools/testing/selftests/bpf/test_sockmap.c
+++ b/tools/testing/selftests/bpf/test_sockmap.c
@@ -78,6 +78,7 @@ int txmsg_end_push;
 int txmsg_start_pop;
 int txmsg_pop;
 int txmsg_ingress;
+int txmsg_pass_skb;
 int txmsg_redir_skb;
 int txmsg_ktls_skb;
 int txmsg_ktls_skb_drop;
@@ -108,6 +109,7 @@ static const struct option long_options[] = {
 	{"txmsg_start_pop",  required_argument,	NULL, 'w'},
 	{"txmsg_pop",	     required_argument,	NULL, 'x'},
 	{"txmsg_ingress", no_argument,		&txmsg_ingress, 1 },
+	{"txmsg_pass_skb", no_argument,		&txmsg_pass_skb, 1 },
 	{"txmsg_redir_skb", no_argument,	&txmsg_redir_skb, 1 },
 	{"ktls", no_argument,			&ktls, 1 },
 	{"peek", no_argument,			&peek_flag, 1 },
@@ -177,6 +179,7 @@ static void test_reset(void)
 	txmsg_pass = txmsg_drop = txmsg_redir = 0;
 	txmsg_apply = txmsg_cork = 0;
 	txmsg_ingress = txmsg_redir_skb = 0;
+	txmsg_pass_skb = 0;
 	txmsg_ktls_skb = txmsg_ktls_skb_drop = txmsg_ktls_skb_redir = 0;
 	txmsg_omit_skb_parser = 0;
 	skb_use_parser = 0;
@@ -956,6 +959,7 @@ static int run_options(struct sockmap_options *options, int cg_fd,  int test)
 {
 	int i, key, next_key, err, zero = 0;
 	struct bpf_program *tx_prog;
+	struct bpf_program *skb_verdict_prog;
 
 	/* If base test skip BPF setup */
 	if (test == BASE || test == BASE_SENDPAGE)
@@ -972,7 +976,12 @@ static int run_options(struct sockmap_options *options, int cg_fd,  int test)
 		}
 	}
 
-	links[1] = bpf_program__attach_sockmap(progs[1], map_fd[0]);
+	if (txmsg_pass_skb)
+		skb_verdict_prog = progs[2];
+	else
+		skb_verdict_prog = progs[1];
+
+	links[1] = bpf_program__attach_sockmap(skb_verdict_prog, map_fd[0]);
 	if (!links[1]) {
 		fprintf(stderr, "ERROR: bpf_program__attach_sockmap (sockmap): (%s)\n",
 			strerror(errno));
@@ -1361,6 +1370,8 @@ static void test_options(char *options)
 	}
 	if (txmsg_ingress)
 		append_str(options, "ingress,", OPTSTRING);
+	if (txmsg_pass_skb)
+		append_str(options, "pass_skb,", OPTSTRING);
 	if (txmsg_redir_skb)
 		append_str(options, "redir_skb,", OPTSTRING);
 	if (txmsg_ktls_skb)
-- 
2.33.0