1 // SPDX-License-Identifier: GPL-2.0 2 /* Copyright (c) 2024 Huawei Technologies Co., Ltd */ 3 4 #include "vmlinux.h" 5 #include <errno.h> 6 #include <bpf/bpf_helpers.h> 7 8 char _license[] SEC("license") = "GPL"; 9 10 struct { 11 __uint(type, BPF_MAP_TYPE_PROG_ARRAY); 12 __uint(max_entries, 1); 13 __uint(key_size, sizeof(__u32)); 14 __uint(value_size, sizeof(__u32)); 15 } jmp_table SEC(".maps"); 16 17 SEC("lsm/file_permission") 18 int lsm_file_permission_prog(void *ctx) 19 { 20 return 0; 21 } 22 23 SEC("lsm/file_alloc_security") 24 int lsm_file_alloc_security_prog(void *ctx) 25 { 26 return 0; 27 } 28 29 SEC("lsm/file_alloc_security") 30 int lsm_file_alloc_security_entry(void *ctx) 31 { 32 bpf_tail_call_static(ctx, &jmp_table, 0); 33 return 0; 34 } 35