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From: John Fastabend <john.fastabend@gmail.com>
To: john.fastabend@gmail.com, alexei.starovoitov@gmail.com,
	daniel@iogearbox.net
Cc: netdev@vger.kernel.org, bpf@vger.kernel.org,
	jakub@cloudflare.com, lmb@cloudflare.com
Subject: [bpf-next PATCH 3/4] bpf, selftests: Add option to test_sockmap to omit adding parser program
Date: Sat, 10 Oct 2020 22:10:04 -0700	[thread overview]
Message-ID: <160239300387.8495.11908295143121563076.stgit@john-Precision-5820-Tower> (raw)
In-Reply-To: <160239226775.8495.15389345509643354423.stgit@john-Precision-5820-Tower>

Add option to allow running without a parser program in place. To test
with ping/pong program use,

 # test_sockmap -t ping --txmsg_omit_skb_parser

this will send packets between two socket bouncing through a proxy
socket that does not use a parser program.

   (ping)                                    (pong)
   sender         proxy_recv proxy_send      recv
     |                |                       |
     |              verdict -----+            |
     |                |          |            |
     +----------------+          +------------+

Signed-off-by: John Fastabend <john.fastabend@gmail.com>
---
 tools/testing/selftests/bpf/test_sockmap.c |   35 +++++++++++++++++-----------
 1 file changed, 21 insertions(+), 14 deletions(-)

diff --git a/tools/testing/selftests/bpf/test_sockmap.c b/tools/testing/selftests/bpf/test_sockmap.c
index 5cf45455de42..419c0b010d14 100644
--- a/tools/testing/selftests/bpf/test_sockmap.c
+++ b/tools/testing/selftests/bpf/test_sockmap.c
@@ -86,6 +86,7 @@ int txmsg_ktls_skb_redir;
 int ktls;
 int peek_flag;
 int skb_use_parser;
+int txmsg_omit_skb_parser;
 
 static const struct option long_options[] = {
 	{"help",	no_argument,		NULL, 'h' },
@@ -111,6 +112,7 @@ static const struct option long_options[] = {
 	{"txmsg_redir_skb", no_argument,	&txmsg_redir_skb, 1 },
 	{"ktls", no_argument,			&ktls, 1 },
 	{"peek", no_argument,			&peek_flag, 1 },
+	{"txmsg_omit_skb_parser", no_argument,      &txmsg_omit_skb_parser, 1},
 	{"whitelist", required_argument,	NULL, 'n' },
 	{"blacklist", required_argument,	NULL, 'b' },
 	{0, 0, NULL, 0 }
@@ -175,6 +177,7 @@ static void test_reset(void)
 	txmsg_apply = txmsg_cork = 0;
 	txmsg_ingress = txmsg_redir_skb = 0;
 	txmsg_ktls_skb = txmsg_ktls_skb_drop = txmsg_ktls_skb_redir = 0;
+	txmsg_omit_skb_parser = 0;
 	skb_use_parser = 0;
 }
 
@@ -912,13 +915,15 @@ static int run_options(struct sockmap_options *options, int cg_fd,  int test)
 		goto run;
 
 	/* Attach programs to sockmap */
-	err = bpf_prog_attach(prog_fd[0], map_fd[0],
-				BPF_SK_SKB_STREAM_PARSER, 0);
-	if (err) {
-		fprintf(stderr,
-			"ERROR: bpf_prog_attach (sockmap %i->%i): %d (%s)\n",
-			prog_fd[0], map_fd[0], err, strerror(errno));
-		return err;
+	if (!txmsg_omit_skb_parser) {
+		err = bpf_prog_attach(prog_fd[0], map_fd[0],
+				      BPF_SK_SKB_STREAM_PARSER, 0);
+		if (err) {
+			fprintf(stderr,
+				"ERROR: bpf_prog_attach (sockmap %i->%i): %d (%s)\n",
+				prog_fd[0], map_fd[0], err, strerror(errno));
+			return err;
+		}
 	}
 
 	err = bpf_prog_attach(prog_fd[1], map_fd[0],
@@ -931,13 +936,15 @@ static int run_options(struct sockmap_options *options, int cg_fd,  int test)
 
 	/* Attach programs to TLS sockmap */
 	if (txmsg_ktls_skb) {
-		err = bpf_prog_attach(prog_fd[0], map_fd[8],
-					BPF_SK_SKB_STREAM_PARSER, 0);
-		if (err) {
-			fprintf(stderr,
-				"ERROR: bpf_prog_attach (TLS sockmap %i->%i): %d (%s)\n",
-				prog_fd[0], map_fd[8], err, strerror(errno));
-			return err;
+		if (!txmsg_omit_skb_parser) {
+			err = bpf_prog_attach(prog_fd[0], map_fd[8],
+					      BPF_SK_SKB_STREAM_PARSER, 0);
+			if (err) {
+				fprintf(stderr,
+					"ERROR: bpf_prog_attach (TLS sockmap %i->%i): %d (%s)\n",
+					prog_fd[0], map_fd[8], err, strerror(errno));
+				return err;
+			}
 		}
 
 		err = bpf_prog_attach(prog_fd[2], map_fd[8],


  parent reply	other threads:[~2020-10-11  5:10 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-11  5:08 [bpf-next PATCH 0/4] bpf, sockmap: allow verdict only sk_skb progs John Fastabend
2020-10-11  5:09 ` [bpf-next PATCH 1/4] bpf, sockmap: check skb_verdict and skb_parser programs explicitly John Fastabend
2020-10-11  5:09 ` [bpf-next PATCH 2/4] bpf, sockmap: Allow skipping sk_skb parser program John Fastabend
2020-10-11  5:10 ` John Fastabend [this message]
2020-10-11  5:10 ` [bpf-next PATCH 4/4] bpf, selftests: Add three new sockmap tests for verdict only programs John Fastabend
2020-10-16  8:12   ` Jakub Sitnicki
2020-10-12  1:20 ` [bpf-next PATCH 0/4] bpf, sockmap: allow verdict only sk_skb progs patchwork-bot+netdevbpf

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