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| 2 | |
| 3 |
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| 4 | #include <uapi/linux/bpf.h>
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| 5 | #include <bpf/bpf_helpers.h>
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| 6 |
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| 7 | #if !defined(__aarch64__)
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| 8 | struct syscalls_enter_open_args {
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| 9 | unsigned long long unused;
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| 10 | long syscall_nr;
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| 11 | long filename_ptr;
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| 12 | long flags;
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| 13 | long mode;
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| 14 | };
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| 15 | #endif
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| 16 |
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| 17 | struct syscalls_exit_open_args {
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| 18 | unsigned long long unused;
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| 19 | long syscall_nr;
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| 20 | long ret;
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| 21 | };
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| 22 |
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| 23 | struct syscalls_enter_open_at_args {
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| 24 | unsigned long long unused;
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| 25 | long syscall_nr;
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| 26 | long long dfd;
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| 27 | long filename_ptr;
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| 28 | long flags;
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| 29 | long mode;
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| 30 | };
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| 31 |
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| 32 | struct {
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| 33 | __uint(type, BPF_MAP_TYPE_ARRAY);
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| 34 | __type(key, u32);
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| 35 | __type(value, u32);
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| 36 | __uint(max_entries, 1);
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| 37 | } enter_open_map SEC(".maps");
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| 38 |
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| 39 | struct {
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| 40 | __uint(type, BPF_MAP_TYPE_ARRAY);
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| 41 | __type(key, u32);
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| 42 | __type(value, u32);
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| 43 | __uint(max_entries, 1);
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| 44 | } exit_open_map SEC(".maps");
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| 45 |
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| 46 | static __always_inline void count(void *map)
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| 47 | {
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| 48 | u32 key = 0;
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| 49 | u32 *value, init_val = 1;
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| 50 |
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| 51 | value = bpf_map_lookup_elem(map, &key);
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| 52 | if (value)
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| 53 | *value += 1;
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| 54 | else
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| 55 | bpf_map_update_elem(map, &key, &init_val, BPF_NOEXIST);
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| 56 | }
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| 57 |
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| 58 | #if !defined(__aarch64__)
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| 59 | SEC("tracepoint/syscalls/sys_enter_open")
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| 60 | int trace_enter_open(struct syscalls_enter_open_args *ctx)
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| 61 | {
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| 62 | count(&enter_open_map);
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| 63 | return 0;
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| 64 | }
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| 65 | #endif
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| 66 |
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| 67 | SEC("tracepoint/syscalls/sys_enter_openat")
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| 68 | int trace_enter_open_at(struct syscalls_enter_open_at_args *ctx)
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| 69 | {
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| 70 | count(&enter_open_map);
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| 71 | return 0;
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| 72 | }
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| 73 |
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| 74 | SEC("tracepoint/syscalls/sys_enter_openat2")
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| 75 | int trace_enter_open_at2(struct syscalls_enter_open_at_args *ctx)
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| 76 | {
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| 77 | count(&enter_open_map);
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| 78 | return 0;
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| 79 | }
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| 80 |
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| 81 | #if !defined(__aarch64__)
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| 82 | SEC("tracepoint/syscalls/sys_exit_open")
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| 83 | int trace_enter_exit(struct syscalls_exit_open_args *ctx)
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| 84 | {
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| 85 | count(&exit_open_map);
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| 86 | return 0;
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| 87 | }
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| 88 | #endif
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| 89 |
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| 90 | SEC("tracepoint/syscalls/sys_exit_openat")
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| 91 | int trace_enter_exit_at(struct syscalls_exit_open_args *ctx)
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| 92 | {
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| 93 | count(&exit_open_map);
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| 94 | return 0;
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| 95 | }
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| 96 |
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| 97 | SEC("tracepoint/syscalls/sys_exit_openat2")
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| 98 | int trace_enter_exit_at2(struct syscalls_exit_open_args *ctx)
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| 99 | {
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| 100 | count(&exit_open_map);
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| 101 | return 0;
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| 102 | }
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