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From: Andrey Ignatov <rdna@fb.com>
To: <netdev@vger.kernel.org>
Cc: Andrey Ignatov <rdna@fb.com>, <ast@kernel.org>,
	<daniel@iogearbox.net>, <brakmo@fb.com>, <kernel-team@fb.com>
Subject: [PATCH bpf-next 6/6] selftests/bpf: Test case for BPF_SOCK_OPS_TCP_LISTEN_CB
Date: Wed, 11 Jul 2018 17:33:37 -0700	[thread overview]
Message-ID: <b6cc238fe8c28451de0018bfd8169a905ee60868.1531355394.git.rdna@fb.com> (raw)
In-Reply-To: <cover.1531355394.git.rdna@fb.com>

Cover new TCP-BPF callback in test_tcpbpf: when listen() is called on
socket, set BPF_SOCK_OPS_STATE_CB_FLAG so that BPF_SOCK_OPS_STATE_CB
callback can be called on future state transition, and when such a
transition happens (TCP_LISTEN -> TCP_CLOSE), track it in the map and
verify it in user space later.

Signed-off-by: Andrey Ignatov <rdna@fb.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
---
 tools/testing/selftests/bpf/test_tcpbpf.h      |  1 +
 tools/testing/selftests/bpf/test_tcpbpf_kern.c | 17 ++++++++++++-----
 tools/testing/selftests/bpf/test_tcpbpf_user.c |  4 +++-
 3 files changed, 16 insertions(+), 6 deletions(-)

diff --git a/tools/testing/selftests/bpf/test_tcpbpf.h b/tools/testing/selftests/bpf/test_tcpbpf.h
index 2fe43289943c..7bcfa6207005 100644
--- a/tools/testing/selftests/bpf/test_tcpbpf.h
+++ b/tools/testing/selftests/bpf/test_tcpbpf.h
@@ -12,5 +12,6 @@ struct tcpbpf_globals {
 	__u32 good_cb_test_rv;
 	__u64 bytes_received;
 	__u64 bytes_acked;
+	__u32 num_listen;
 };
 #endif
diff --git a/tools/testing/selftests/bpf/test_tcpbpf_kern.c b/tools/testing/selftests/bpf/test_tcpbpf_kern.c
index 3e645ee41ed5..4b7fd540cea9 100644
--- a/tools/testing/selftests/bpf/test_tcpbpf_kern.c
+++ b/tools/testing/selftests/bpf/test_tcpbpf_kern.c
@@ -96,15 +96,22 @@ int bpf_testcb(struct bpf_sock_ops *skops)
 			if (!gp)
 				break;
 			g = *gp;
-			g.total_retrans = skops->total_retrans;
-			g.data_segs_in = skops->data_segs_in;
-			g.data_segs_out = skops->data_segs_out;
-			g.bytes_received = skops->bytes_received;
-			g.bytes_acked = skops->bytes_acked;
+			if (skops->args[0] == BPF_TCP_LISTEN) {
+				g.num_listen++;
+			} else {
+				g.total_retrans = skops->total_retrans;
+				g.data_segs_in = skops->data_segs_in;
+				g.data_segs_out = skops->data_segs_out;
+				g.bytes_received = skops->bytes_received;
+				g.bytes_acked = skops->bytes_acked;
+			}
 			bpf_map_update_elem(&global_map, &key, &g,
 					    BPF_ANY);
 		}
 		break;
+	case BPF_SOCK_OPS_TCP_LISTEN_CB:
+		bpf_sock_ops_cb_flags_set(skops, BPF_SOCK_OPS_STATE_CB_FLAG);
+		break;
 	default:
 		rv = -1;
 	}
diff --git a/tools/testing/selftests/bpf/test_tcpbpf_user.c b/tools/testing/selftests/bpf/test_tcpbpf_user.c
index 971f1644b9c7..a275c2971376 100644
--- a/tools/testing/selftests/bpf/test_tcpbpf_user.c
+++ b/tools/testing/selftests/bpf/test_tcpbpf_user.c
@@ -37,7 +37,8 @@ int verify_result(const struct tcpbpf_globals *result)
 			   (1 << BPF_SOCK_OPS_ACTIVE_ESTABLISHED_CB) |
 			   (1 << BPF_SOCK_OPS_PASSIVE_ESTABLISHED_CB) |
 			   (1 << BPF_SOCK_OPS_NEEDS_ECN) |
-			   (1 << BPF_SOCK_OPS_STATE_CB));
+			   (1 << BPF_SOCK_OPS_STATE_CB) |
+			   (1 << BPF_SOCK_OPS_TCP_LISTEN_CB));
 
 	EXPECT_EQ(expected_events, result->event_map, "#" PRIx32);
 	EXPECT_EQ(501ULL, result->bytes_received, "llu");
@@ -46,6 +47,7 @@ int verify_result(const struct tcpbpf_globals *result)
 	EXPECT_EQ(1, result->data_segs_out, PRIu32);
 	EXPECT_EQ(0x80, result->bad_cb_test_rv, PRIu32);
 	EXPECT_EQ(0, result->good_cb_test_rv, PRIu32);
+	EXPECT_EQ(1, result->num_listen, PRIu32);
 
 	return 0;
 err:
-- 
2.17.1

  parent reply	other threads:[~2018-07-12  0:41 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-07-12  0:33 [PATCH bpf-next 0/6] TCP-BPF callback for listening sockets Andrey Ignatov
2018-07-12  0:33 ` [PATCH bpf-next 1/6] bpf: Add BPF_SOCK_OPS_TCP_LISTEN_CB Andrey Ignatov
2018-07-12  0:33 ` [PATCH bpf-next 2/6] bpf: Sync bpf.h to tools/ Andrey Ignatov
2018-07-12  0:33 ` [PATCH bpf-next 3/6] selftests/bpf: Fix const'ness in cgroup_helpers Andrey Ignatov
2018-07-12  0:33 ` [PATCH bpf-next 4/6] selftests/bpf: Switch test_tcpbpf_user to cgroup_helpers Andrey Ignatov
2018-07-12  0:33 ` [PATCH bpf-next 5/6] selftests/bpf: Better verification in test_tcpbpf Andrey Ignatov
2018-07-12  0:33 ` Andrey Ignatov [this message]
2018-07-12 14:59 ` [PATCH bpf-next 0/6] TCP-BPF callback for listening sockets Lawrence Brakmo
2018-07-14 22:18 ` Daniel Borkmann

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