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