netdev - [PATCH v3 bpf-next 3/6] selftests/bpf: Implement BPF programs for kernel socket operations

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Date: Mon, 29 Apr 2024 16:45:20 -0500
From: Jordan Rife <jrife@...gle.com>
To: bpf@...r.kernel.org
Cc: Jordan Rife <jrife@...gle.com>, linux-kselftest@...r.kernel.org, 
	netdev@...r.kernel.org, Alexei Starovoitov <ast@...nel.org>, 
	Daniel Borkmann <daniel@...earbox.net>, Andrii Nakryiko <andrii@...nel.org>, 
	Martin KaFai Lau <martin.lau@...ux.dev>, Eduard Zingerman <eddyz87@...il.com>, Song Liu <song@...nel.org>, 
	Yonghong Song <yonghong.song@...ux.dev>, John Fastabend <john.fastabend@...il.com>, 
	KP Singh <kpsingh@...nel.org>, Stanislav Fomichev <sdf@...gle.com>, Hao Luo <haoluo@...gle.com>, 
	Jiri Olsa <jolsa@...nel.org>, Mykola Lysenko <mykolal@...com>, Shuah Khan <shuah@...nel.org>, 
	Kui-Feng Lee <thinker.li@...il.com>, Artem Savkov <asavkov@...hat.com>, 
	Dave Marchevsky <davemarchevsky@...com>, Menglong Dong <imagedong@...cent.com>, Daniel Xu <dxu@...uu.xyz>, 
	David Vernet <void@...ifault.com>, Daan De Meyer <daan.j.demeyer@...il.com>, 
	Benjamin Tissoires <bentiss@...nel.org>, Hou Tao <houtao1@...wei.com>, 
	Willem de Bruijn <willemdebruijn.kernel@...il.com>
Subject: [PATCH v3 bpf-next 3/6] selftests/bpf: Implement BPF programs for
 kernel socket operations

This patch lays out a set of SYSCALL programs that can be used to invoke
the socket operation kfuncs in bpf_testmod, allowing a test program to
manipulate kernel socket operations from userspace.

Signed-off-by: Jordan Rife <jrife@...gle.com>
---
 .../selftests/bpf/progs/sock_addr_kern.c      | 65 +++++++++++++++++++
 1 file changed, 65 insertions(+)
 create mode 100644 tools/testing/selftests/bpf/progs/sock_addr_kern.c

diff --git a/tools/testing/selftests/bpf/progs/sock_addr_kern.c b/tools/testing/selftests/bpf/progs/sock_addr_kern.c
new file mode 100644
index 0000000000000..8386bb15ccdc1
--- /dev/null
+++ b/tools/testing/selftests/bpf/progs/sock_addr_kern.c
@@ -0,0 +1,65 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright (c) 2024 Google LLC */
+#include <vmlinux.h>
+#include <bpf/bpf_helpers.h>
+#include "../bpf_testmod/bpf_testmod_kfunc.h"
+
+SEC("syscall")
+int init_sock(struct init_sock_args *args)
+{
+	bpf_kfunc_init_sock(args);
+
+	return 0;
+}
+
+SEC("syscall")
+int close_sock(void *ctx)
+{
+	bpf_kfunc_close_sock();
+
+	return 0;
+}
+
+SEC("syscall")
+int kernel_connect(struct addr_args *args)
+{
+	return bpf_kfunc_call_kernel_connect(args);
+}
+
+SEC("syscall")
+int kernel_bind(struct addr_args *args)
+{
+	return bpf_kfunc_call_kernel_bind(args);
+}
+
+SEC("syscall")
+int kernel_listen(struct addr_args *args)
+{
+	return bpf_kfunc_call_kernel_listen();
+}
+
+SEC("syscall")
+int kernel_sendmsg(struct sendmsg_args *args)
+{
+	return bpf_kfunc_call_kernel_sendmsg(args);
+}
+
+SEC("syscall")
+int sock_sendmsg(struct sendmsg_args *args)
+{
+	return bpf_kfunc_call_sock_sendmsg(args);
+}
+
+SEC("syscall")
+int kernel_getsockname(struct addr_args *args)
+{
+	return bpf_kfunc_call_kernel_getsockname(args);
+}
+
+SEC("syscall")
+int kernel_getpeername(struct addr_args *args)
+{
+	return bpf_kfunc_call_kernel_getpeername(args);
+}
+
+char _license[] SEC("license") = "GPL";
-- 
2.44.0.769.g3c40516874-goog