ea9d561686
Use more ergonomic bpf_core_cast() macro instead of bpf_rdonly_cast() in selftests code. Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/r/20240130212023.183765-3-andrii@kernel.org Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
38 lines
955 B
C
38 lines
955 B
C
// SPDX-License-Identifier: GPL-2.0
|
|
/* Copyright (c) 2023 Meta Platforms, Inc. and affiliates. */
|
|
|
|
#include "vmlinux.h"
|
|
|
|
#include <string.h>
|
|
#include <bpf/bpf_helpers.h>
|
|
#include <bpf/bpf_core_read.h>
|
|
#include "bpf_kfuncs.h"
|
|
|
|
__u8 SERVUN_ADDRESS[] = "\0bpf_cgroup_unix_test";
|
|
|
|
SEC("cgroup/recvmsg_unix")
|
|
int recvmsg_unix_prog(struct bpf_sock_addr *ctx)
|
|
{
|
|
struct bpf_sock_addr_kern *sa_kern = bpf_cast_to_kern_ctx(ctx);
|
|
struct sockaddr_un *sa_kern_unaddr;
|
|
__u32 unaddrlen = offsetof(struct sockaddr_un, sun_path) +
|
|
sizeof(SERVUN_ADDRESS) - 1;
|
|
int ret;
|
|
|
|
ret = bpf_sock_addr_set_sun_path(sa_kern, SERVUN_ADDRESS,
|
|
sizeof(SERVUN_ADDRESS) - 1);
|
|
if (ret)
|
|
return 1;
|
|
|
|
if (sa_kern->uaddrlen != unaddrlen)
|
|
return 1;
|
|
|
|
sa_kern_unaddr = bpf_core_cast(sa_kern->uaddr, struct sockaddr_un);
|
|
if (memcmp(sa_kern_unaddr->sun_path, SERVUN_ADDRESS,
|
|
sizeof(SERVUN_ADDRESS) - 1) != 0)
|
|
return 1;
|
|
|
|
return 1;
|
|
}
|
|
|
|
char _license[] SEC("license") = "GPL";
|