| /* SPDX-License-Identifier: GPL-2.0 */ |
| |
| #undef TRACE_SYSTEM_VAR |
| |
| #ifdef CONFIG_BPF_EVENTS |
| |
| #undef __entry |
| #define __entry entry |
| |
| #undef __get_dynamic_array |
| #define __get_dynamic_array(field) \ |
| ((void *)__entry + (__entry->__data_loc_##field & 0xffff)) |
| |
| #undef __get_dynamic_array_len |
| #define __get_dynamic_array_len(field) \ |
| ((__entry->__data_loc_##field >> 16) & 0xffff) |
| |
| #undef __get_str |
| #define __get_str(field) ((char *)__get_dynamic_array(field)) |
| |
| #undef __get_bitmask |
| #define __get_bitmask(field) (char *)__get_dynamic_array(field) |
| |
| #undef __get_cpumask |
| #define __get_cpumask(field) (char *)__get_dynamic_array(field) |
| |
| #undef __get_sockaddr |
| #define __get_sockaddr(field) ((struct sockaddr *)__get_dynamic_array(field)) |
| |
| #undef __get_rel_dynamic_array |
| #define __get_rel_dynamic_array(field) \ |
| ((void *)(&__entry->__rel_loc_##field) + \ |
| sizeof(__entry->__rel_loc_##field) + \ |
| (__entry->__rel_loc_##field & 0xffff)) |
| |
| #undef __get_rel_dynamic_array_len |
| #define __get_rel_dynamic_array_len(field) \ |
| ((__entry->__rel_loc_##field >> 16) & 0xffff) |
| |
| #undef __get_rel_str |
| #define __get_rel_str(field) ((char *)__get_rel_dynamic_array(field)) |
| |
| #undef __get_rel_bitmask |
| #define __get_rel_bitmask(field) (char *)__get_rel_dynamic_array(field) |
| |
| #undef __get_rel_cpumask |
| #define __get_rel_cpumask(field) (char *)__get_rel_dynamic_array(field) |
| |
| #undef __get_rel_sockaddr |
| #define __get_rel_sockaddr(field) ((struct sockaddr *)__get_rel_dynamic_array(field)) |
| |
| #undef __perf_count |
| #define __perf_count(c) (c) |
| |
| #undef __perf_task |
| #define __perf_task(t) (t) |
| |
| /* cast any integer, pointer, or small struct to u64 */ |
| #define UINTTYPE(size) \ |
| __typeof__(__builtin_choose_expr(size == 1, (u8)1, \ |
| __builtin_choose_expr(size == 2, (u16)2, \ |
| __builtin_choose_expr(size == 4, (u32)3, \ |
| __builtin_choose_expr(size == 8, (u64)4, \ |
| (void)5))))) |
| #define __CAST_TO_U64(x) ({ \ |
| typeof(x) __src = (x); \ |
| UINTTYPE(sizeof(x)) __dst; \ |
| memcpy(&__dst, &__src, sizeof(__dst)); \ |
| (u64)__dst; }) |
| |
| #define __CAST1(a,...) __CAST_TO_U64(a) |
| #define __CAST2(a,...) __CAST_TO_U64(a), __CAST1(__VA_ARGS__) |
| #define __CAST3(a,...) __CAST_TO_U64(a), __CAST2(__VA_ARGS__) |
| #define __CAST4(a,...) __CAST_TO_U64(a), __CAST3(__VA_ARGS__) |
| #define __CAST5(a,...) __CAST_TO_U64(a), __CAST4(__VA_ARGS__) |
| #define __CAST6(a,...) __CAST_TO_U64(a), __CAST5(__VA_ARGS__) |
| #define __CAST7(a,...) __CAST_TO_U64(a), __CAST6(__VA_ARGS__) |
| #define __CAST8(a,...) __CAST_TO_U64(a), __CAST7(__VA_ARGS__) |
| #define __CAST9(a,...) __CAST_TO_U64(a), __CAST8(__VA_ARGS__) |
| #define __CAST10(a,...) __CAST_TO_U64(a), __CAST9(__VA_ARGS__) |
| #define __CAST11(a,...) __CAST_TO_U64(a), __CAST10(__VA_ARGS__) |
| #define __CAST12(a,...) __CAST_TO_U64(a), __CAST11(__VA_ARGS__) |
| /* tracepoints with more than 12 arguments will hit build error */ |
| #define CAST_TO_U64(...) CONCATENATE(__CAST, COUNT_ARGS(__VA_ARGS__))(__VA_ARGS__) |
| |
| #define __BPF_DECLARE_TRACE(call, proto, args) \ |
| static notrace void \ |
| __bpf_trace_##call(void *__data, proto) \ |
| { \ |
| struct bpf_prog *prog = __data; \ |
| CONCATENATE(bpf_trace_run, COUNT_ARGS(args))(prog, CAST_TO_U64(args)); \ |
| } |
| |
| #undef DECLARE_EVENT_CLASS |
| #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ |
| __BPF_DECLARE_TRACE(call, PARAMS(proto), PARAMS(args)) |
| |
| /* |
| * This part is compiled out, it is only here as a build time check |
| * to make sure that if the tracepoint handling changes, the |
| * bpf probe will fail to compile unless it too is updated. |
| */ |
| #define __DEFINE_EVENT(template, call, proto, args, size) \ |
| static inline void bpf_test_probe_##call(void) \ |
| { \ |
| check_trace_callback_type_##call(__bpf_trace_##template); \ |
| } \ |
| typedef void (*btf_trace_##call)(void *__data, proto); \ |
| static union { \ |
| struct bpf_raw_event_map event; \ |
| btf_trace_##call handler; \ |
| } __bpf_trace_tp_map_##call __used \ |
| __section("__bpf_raw_tp_map") = { \ |
| .event = { \ |
| .tp = &__tracepoint_##call, \ |
| .bpf_func = __bpf_trace_##template, \ |
| .num_args = COUNT_ARGS(args), \ |
| .writable_size = size, \ |
| }, \ |
| }; |
| |
| #define FIRST(x, ...) x |
| |
| #define __CHECK_WRITABLE_BUF_SIZE(call, proto, args, size) \ |
| static inline void bpf_test_buffer_##call(void) \ |
| { \ |
| /* BUILD_BUG_ON() is ignored if the code is completely eliminated, but \ |
| * BUILD_BUG_ON_ZERO() uses a different mechanism that is not \ |
| * dead-code-eliminated. \ |
| */ \ |
| FIRST(proto); \ |
| (void)BUILD_BUG_ON_ZERO(size != sizeof(*FIRST(args))); \ |
| } |
| |
| #undef DEFINE_EVENT_WRITABLE |
| #define DEFINE_EVENT_WRITABLE(template, call, proto, args, size) \ |
| __CHECK_WRITABLE_BUF_SIZE(call, PARAMS(proto), PARAMS(args), size) \ |
| __DEFINE_EVENT(template, call, PARAMS(proto), PARAMS(args), size) |
| |
| #undef DEFINE_EVENT |
| #define DEFINE_EVENT(template, call, proto, args) \ |
| __DEFINE_EVENT(template, call, PARAMS(proto), PARAMS(args), 0) |
| |
| #undef DEFINE_EVENT_PRINT |
| #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \ |
| DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) |
| |
| #undef DECLARE_TRACE |
| #define DECLARE_TRACE(call, proto, args) \ |
| __BPF_DECLARE_TRACE(call, PARAMS(proto), PARAMS(args)) \ |
| __DEFINE_EVENT(call, call, PARAMS(proto), PARAMS(args), 0) |
| |
| #undef DECLARE_TRACE_WRITABLE |
| #define DECLARE_TRACE_WRITABLE(call, proto, args, size) \ |
| __CHECK_WRITABLE_BUF_SIZE(call, PARAMS(proto), PARAMS(args), size) \ |
| __BPF_DECLARE_TRACE(call, PARAMS(proto), PARAMS(args)) \ |
| __DEFINE_EVENT(call, call, PARAMS(proto), PARAMS(args), size) |
| |
| #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
| |
| #undef DECLARE_TRACE_WRITABLE |
| #undef DEFINE_EVENT_WRITABLE |
| #undef __CHECK_WRITABLE_BUF_SIZE |
| #undef __DEFINE_EVENT |
| #undef FIRST |
| |
| #endif /* CONFIG_BPF_EVENTS */ |