diff mbox series

[RFC,bpf-next,v2,5/8] selftests/bpf: Add mptcpify program

Message ID b603ea19dee78e03d19ef1ac619545f5e2a28daa.1688629124.git.geliang.tang@suse.com (mailing list archive)
State Superseded
Delegated to: BPF
Headers show
Series BPF 'force to MPTCP' | expand

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netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 8 this patch: 8
netdev/cc_maintainers warning 6 maintainers not CCed: matthieu.baerts@tessares.net netdev@vger.kernel.org martineau@kernel.org shuah@kernel.org mykolal@fb.com linux-kselftest@vger.kernel.org
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netdev/check_selftest success No net selftest shell script
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Commit Message

Geliang Tang July 6, 2023, 7:47 a.m. UTC 
This patch implements a new test program mptcpify: if the family is
AF_INET or AF_INET6, the type is SOCK_STREAM, and the protocol ID is
0 or IPPROTO_TCP, set it to IPPROTO_MPTCP.

This is defined in a newly added 'sockinit' SEC, so it will be hooked
in BPF_CGROUP_RUN_PROG_SOCKINIT() in __socket_create().

Signed-off-by: Geliang Tang <geliang.tang@suse.com>
---
 .../bpf/cgroup_getset_retval_hooks.h          |  1 +
 .../selftests/bpf/prog_tests/section_names.c  |  5 ++++
 tools/testing/selftests/bpf/progs/mptcpify.c  | 26 +++++++++++++++++++
 3 files changed, 32 insertions(+)
 create mode 100644 tools/testing/selftests/bpf/progs/mptcpify.c
diff mbox series

Patch

diff --git a/tools/testing/selftests/bpf/cgroup_getset_retval_hooks.h b/tools/testing/selftests/bpf/cgroup_getset_retval_hooks.h
index a525d3544fd7..0ba09e135df3 100644
--- a/tools/testing/selftests/bpf/cgroup_getset_retval_hooks.h
+++ b/tools/testing/selftests/bpf/cgroup_getset_retval_hooks.h
@@ -14,6 +14,7 @@  BPF_RETVAL_HOOK(post_bind6, "cgroup/post_bind6", bpf_sock_addr, 0)
 BPF_RETVAL_HOOK(sendmsg4, "cgroup/sendmsg4", bpf_sock_addr, 0)
 BPF_RETVAL_HOOK(sendmsg6, "cgroup/sendmsg6", bpf_sock_addr, 0)
 BPF_RETVAL_HOOK(sysctl, "cgroup/sysctl", bpf_sysctl, 0)
+BPF_RETVAL_HOOK(sockinit, "cgroup/sockinit", bpf_sockinit_ctx, 0)
 BPF_RETVAL_HOOK(recvmsg4, "cgroup/recvmsg4", bpf_sock_addr, -EINVAL)
 BPF_RETVAL_HOOK(recvmsg6, "cgroup/recvmsg6", bpf_sock_addr, -EINVAL)
 BPF_RETVAL_HOOK(getsockopt, "cgroup/getsockopt", bpf_sockopt, 0)
diff --git a/tools/testing/selftests/bpf/prog_tests/section_names.c b/tools/testing/selftests/bpf/prog_tests/section_names.c
index 8b571890c57e..52319c45de57 100644
--- a/tools/testing/selftests/bpf/prog_tests/section_names.c
+++ b/tools/testing/selftests/bpf/prog_tests/section_names.c
@@ -158,6 +158,11 @@  static struct sec_name_test tests[] = {
 		{0, BPF_PROG_TYPE_CGROUP_SOCKOPT, BPF_CGROUP_SETSOCKOPT},
 		{0, BPF_CGROUP_SETSOCKOPT},
 	},
+	{
+		"cgroup/sockinit",
+		{0, BPF_PROG_TYPE_CGROUP_SOCKINIT, BPF_CGROUP_SOCKINIT},
+		{0, BPF_CGROUP_SOCKINIT},
+	},
 };
 
 static void test_prog_type_by_name(const struct sec_name_test *test)
diff --git a/tools/testing/selftests/bpf/progs/mptcpify.c b/tools/testing/selftests/bpf/progs/mptcpify.c
new file mode 100644
index 000000000000..f751e6f65eca
--- /dev/null
+++ b/tools/testing/selftests/bpf/progs/mptcpify.c
@@ -0,0 +1,26 @@ 
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright (c) 2023, SUSE. */
+
+#include <linux/bpf.h>
+#include <bpf/bpf_helpers.h>
+#include "bpf_tcp_helpers.h"
+
+char _license[] SEC("license") = "GPL";
+
+#define	AF_INET		2
+#define	AF_INET6	10
+#define	SOCK_STREAM	1
+#define	IPPROTO_TCP	6
+#define	IPPROTO_MPTCP	262
+
+SEC("cgroup/sockinit")
+int mptcpify(struct bpf_sockinit_ctx *ctx)
+{
+	if ((ctx->family == AF_INET || ctx->family == AF_INET6) &&
+	    ctx->type == SOCK_STREAM &&
+	    (!ctx->protocol || ctx->protocol == IPPROTO_TCP)) {
+		ctx->protocol = IPPROTO_MPTCP;
+	}
+
+	return 1;
+}