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git.proxmox.com Git - mirror_ubuntu-jammy-kernel.git/blob - samples/bpf/syscall_tp_kern.c
1 // SPDX-License-Identifier: GPL-2.0-only
2 /* Copyright (c) 2017 Facebook
4 #include <uapi/linux/bpf.h>
5 #include <bpf/bpf_helpers.h>
7 struct syscalls_enter_open_args
{
8 unsigned long long unused
;
15 struct syscalls_exit_open_args
{
16 unsigned long long unused
;
22 __uint(type
, BPF_MAP_TYPE_ARRAY
);
25 __uint(max_entries
, 1);
26 } enter_open_map
SEC(".maps");
29 __uint(type
, BPF_MAP_TYPE_ARRAY
);
32 __uint(max_entries
, 1);
33 } exit_open_map
SEC(".maps");
35 static __always_inline
void count(void *map
)
38 u32
*value
, init_val
= 1;
40 value
= bpf_map_lookup_elem(map
, &key
);
44 bpf_map_update_elem(map
, &key
, &init_val
, BPF_NOEXIST
);
47 SEC("tracepoint/syscalls/sys_enter_open")
48 int trace_enter_open(struct syscalls_enter_open_args
*ctx
)
50 count(&enter_open_map
);
54 SEC("tracepoint/syscalls/sys_enter_openat")
55 int trace_enter_open_at(struct syscalls_enter_open_args
*ctx
)
57 count(&enter_open_map
);
61 SEC("tracepoint/syscalls/sys_exit_open")
62 int trace_enter_exit(struct syscalls_exit_open_args
*ctx
)
64 count(&exit_open_map
);
68 SEC("tracepoint/syscalls/sys_exit_openat")
69 int trace_enter_exit_at(struct syscalls_exit_open_args
*ctx
)
71 count(&exit_open_map
);