Orange Pi5 kernel

// SPDX-License-Identifier: GPL-2.0-only
/* Copyright (c) 2017 Facebook
 */
#include <uapi/linux/bpf.h>
#include <bpf/bpf_helpers.h>
 
struct syscalls_enter_open_args {
<------>unsigned long long unused;
<------>long syscall_nr;
<------>long filename_ptr;
<------>long flags;
<------>long mode;
};
 
struct syscalls_exit_open_args {
<------>unsigned long long unused;
<------>long syscall_nr;
<------>long ret;
};
 
struct {
<------>__uint(type, BPF_MAP_TYPE_ARRAY);
<------>__type(key, u32);
<------>__type(value, u32);
<------>__uint(max_entries, 1);
} enter_open_map SEC(".maps");
 
struct {
<------>__uint(type, BPF_MAP_TYPE_ARRAY);
<------>__type(key, u32);
<------>__type(value, u32);
<------>__uint(max_entries, 1);
} exit_open_map SEC(".maps");
 
static __always_inline void count(void *map)
{
<------>u32 key = 0;
<------>u32 *value, init_val = 1;
 
<------>value = bpf_map_lookup_elem(map, &key);
<------>if (value)
<------><------>*value += 1;
<------>else
<------><------>bpf_map_update_elem(map, &key, &init_val, BPF_NOEXIST);
}
 
SEC("tracepoint/syscalls/sys_enter_open")
int trace_enter_open(struct syscalls_enter_open_args *ctx)
{
<------>count(&enter_open_map);
<------>return 0;
}
 
SEC("tracepoint/syscalls/sys_enter_openat")
int trace_enter_open_at(struct syscalls_enter_open_args *ctx)
{
<------>count(&enter_open_map);
<------>return 0;
}
 
SEC("tracepoint/syscalls/sys_exit_open")
int trace_enter_exit(struct syscalls_exit_open_args *ctx)
{
<------>count(&exit_open_map);
<------>return 0;
}
 
SEC("tracepoint/syscalls/sys_exit_openat")
int trace_enter_exit_at(struct syscalls_exit_open_args *ctx)
{
<------>count(&exit_open_map);
<------>return 0;
}