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-rw-r--r--include/trace/ftrace.h93
1 files changed, 62 insertions, 31 deletions
diff --git a/include/trace/ftrace.h b/include/trace/ftrace.h
index f64fbaae781a..308bafd93325 100644
--- a/include/trace/ftrace.h
+++ b/include/trace/ftrace.h
@@ -21,11 +21,14 @@
21#undef __field 21#undef __field
22#define __field(type, item) type item; 22#define __field(type, item) type item;
23 23
24#undef __field_ext
25#define __field_ext(type, item, filter_type) type item;
26
24#undef __array 27#undef __array
25#define __array(type, item, len) type item[len]; 28#define __array(type, item, len) type item[len];
26 29
27#undef __dynamic_array 30#undef __dynamic_array
28#define __dynamic_array(type, item, len) unsigned short __data_loc_##item; 31#define __dynamic_array(type, item, len) u32 __data_loc_##item;
29 32
30#undef __string 33#undef __string
31#define __string(item, src) __dynamic_array(char, item, -1) 34#define __string(item, src) __dynamic_array(char, item, -1)
@@ -42,6 +45,16 @@
42 }; \ 45 }; \
43 static struct ftrace_event_call event_##name 46 static struct ftrace_event_call event_##name
44 47
48#undef __cpparg
49#define __cpparg(arg...) arg
50
51/* Callbacks are meaningless to ftrace. */
52#undef TRACE_EVENT_FN
53#define TRACE_EVENT_FN(name, proto, args, tstruct, \
54 assign, print, reg, unreg) \
55 TRACE_EVENT(name, __cpparg(proto), __cpparg(args), \
56 __cpparg(tstruct), __cpparg(assign), __cpparg(print)) \
57
45#include TRACE_INCLUDE(TRACE_INCLUDE_FILE) 58#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
46 59
47 60
@@ -51,23 +64,27 @@
51 * Include the following: 64 * Include the following:
52 * 65 *
53 * struct ftrace_data_offsets_<call> { 66 * struct ftrace_data_offsets_<call> {
54 * int <item1>; 67 * u32 <item1>;
55 * int <item2>; 68 * u32 <item2>;
56 * [...] 69 * [...]
57 * }; 70 * };
58 * 71 *
59 * The __dynamic_array() macro will create each int <item>, this is 72 * The __dynamic_array() macro will create each u32 <item>, this is
60 * to keep the offset of each array from the beginning of the event. 73 * to keep the offset of each array from the beginning of the event.
74 * The size of an array is also encoded, in the higher 16 bits of <item>.
61 */ 75 */
62 76
63#undef __field 77#undef __field
64#define __field(type, item); 78#define __field(type, item)
79
80#undef __field_ext
81#define __field_ext(type, item, filter_type)
65 82
66#undef __array 83#undef __array
67#define __array(type, item, len) 84#define __array(type, item, len)
68 85
69#undef __dynamic_array 86#undef __dynamic_array
70#define __dynamic_array(type, item, len) int item; 87#define __dynamic_array(type, item, len) u32 item;
71 88
72#undef __string 89#undef __string
73#define __string(item, src) __dynamic_array(char, item, -1) 90#define __string(item, src) __dynamic_array(char, item, -1)
@@ -109,6 +126,9 @@
109 if (!ret) \ 126 if (!ret) \
110 return 0; 127 return 0;
111 128
129#undef __field_ext
130#define __field_ext(type, item, filter_type) __field(type, item)
131
112#undef __array 132#undef __array
113#define __array(type, item, len) \ 133#define __array(type, item, len) \
114 ret = trace_seq_printf(s, "\tfield:" #type " " #item "[" #len "];\t" \ 134 ret = trace_seq_printf(s, "\tfield:" #type " " #item "[" #len "];\t" \
@@ -120,7 +140,7 @@
120 140
121#undef __dynamic_array 141#undef __dynamic_array
122#define __dynamic_array(type, item, len) \ 142#define __dynamic_array(type, item, len) \
123 ret = trace_seq_printf(s, "\tfield:__data_loc " #item ";\t" \ 143 ret = trace_seq_printf(s, "\tfield:__data_loc " #type "[] " #item ";\t"\
124 "offset:%u;\tsize:%u;\n", \ 144 "offset:%u;\tsize:%u;\n", \
125 (unsigned int)offsetof(typeof(field), \ 145 (unsigned int)offsetof(typeof(field), \
126 __data_loc_##item), \ 146 __data_loc_##item), \
@@ -150,7 +170,8 @@
150#undef TRACE_EVENT 170#undef TRACE_EVENT
151#define TRACE_EVENT(call, proto, args, tstruct, func, print) \ 171#define TRACE_EVENT(call, proto, args, tstruct, func, print) \
152static int \ 172static int \
153ftrace_format_##call(struct trace_seq *s) \ 173ftrace_format_##call(struct ftrace_event_call *unused, \
174 struct trace_seq *s) \
154{ \ 175{ \
155 struct ftrace_raw_##call field __attribute__((unused)); \ 176 struct ftrace_raw_##call field __attribute__((unused)); \
156 int ret = 0; \ 177 int ret = 0; \
@@ -210,7 +231,7 @@ ftrace_format_##call(struct trace_seq *s) \
210 231
211#undef __get_dynamic_array 232#undef __get_dynamic_array
212#define __get_dynamic_array(field) \ 233#define __get_dynamic_array(field) \
213 ((void *)__entry + __entry->__data_loc_##field) 234 ((void *)__entry + (__entry->__data_loc_##field & 0xffff))
214 235
215#undef __get_str 236#undef __get_str
216#define __get_str(field) (char *)__get_dynamic_array(field) 237#define __get_str(field) (char *)__get_dynamic_array(field)
@@ -263,28 +284,33 @@ ftrace_raw_output_##call(struct trace_iterator *iter, int flags) \
263 284
264#include TRACE_INCLUDE(TRACE_INCLUDE_FILE) 285#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
265 286
266#undef __field 287#undef __field_ext
267#define __field(type, item) \ 288#define __field_ext(type, item, filter_type) \
268 ret = trace_define_field(event_call, #type, #item, \ 289 ret = trace_define_field(event_call, #type, #item, \
269 offsetof(typeof(field), item), \ 290 offsetof(typeof(field), item), \
270 sizeof(field.item), is_signed_type(type)); \ 291 sizeof(field.item), \
292 is_signed_type(type), filter_type); \
271 if (ret) \ 293 if (ret) \
272 return ret; 294 return ret;
273 295
296#undef __field
297#define __field(type, item) __field_ext(type, item, FILTER_OTHER)
298
274#undef __array 299#undef __array
275#define __array(type, item, len) \ 300#define __array(type, item, len) \
276 BUILD_BUG_ON(len > MAX_FILTER_STR_VAL); \ 301 BUILD_BUG_ON(len > MAX_FILTER_STR_VAL); \
277 ret = trace_define_field(event_call, #type "[" #len "]", #item, \ 302 ret = trace_define_field(event_call, #type "[" #len "]", #item, \
278 offsetof(typeof(field), item), \ 303 offsetof(typeof(field), item), \
279 sizeof(field.item), 0); \ 304 sizeof(field.item), 0, FILTER_OTHER); \
280 if (ret) \ 305 if (ret) \
281 return ret; 306 return ret;
282 307
283#undef __dynamic_array 308#undef __dynamic_array
284#define __dynamic_array(type, item, len) \ 309#define __dynamic_array(type, item, len) \
285 ret = trace_define_field(event_call, "__data_loc" "[" #type "]", #item,\ 310 ret = trace_define_field(event_call, "__data_loc " #type "[]", #item, \
286 offsetof(typeof(field), __data_loc_##item), \ 311 offsetof(typeof(field), __data_loc_##item), \
287 sizeof(field.__data_loc_##item), 0); 312 sizeof(field.__data_loc_##item), 0, \
313 FILTER_OTHER);
288 314
289#undef __string 315#undef __string
290#define __string(item, src) __dynamic_array(char, item, -1) 316#define __string(item, src) __dynamic_array(char, item, -1)
@@ -292,17 +318,14 @@ ftrace_raw_output_##call(struct trace_iterator *iter, int flags) \
292#undef TRACE_EVENT 318#undef TRACE_EVENT
293#define TRACE_EVENT(call, proto, args, tstruct, func, print) \ 319#define TRACE_EVENT(call, proto, args, tstruct, func, print) \
294int \ 320int \
295ftrace_define_fields_##call(void) \ 321ftrace_define_fields_##call(struct ftrace_event_call *event_call) \
296{ \ 322{ \
297 struct ftrace_raw_##call field; \ 323 struct ftrace_raw_##call field; \
298 struct ftrace_event_call *event_call = &event_##call; \
299 int ret; \ 324 int ret; \
300 \ 325 \
301 __common_field(int, type, 1); \ 326 ret = trace_define_common_fields(event_call); \
302 __common_field(unsigned char, flags, 0); \ 327 if (ret) \
303 __common_field(unsigned char, preempt_count, 0); \ 328 return ret; \
304 __common_field(int, pid, 1); \
305 __common_field(int, tgid, 1); \
306 \ 329 \
307 tstruct; \ 330 tstruct; \
308 \ 331 \
@@ -321,6 +344,9 @@ ftrace_define_fields_##call(void) \
321#undef __field 344#undef __field
322#define __field(type, item) 345#define __field(type, item)
323 346
347#undef __field_ext
348#define __field_ext(type, item, filter_type)
349
324#undef __array 350#undef __array
325#define __array(type, item, len) 351#define __array(type, item, len)
326 352
@@ -328,6 +354,7 @@ ftrace_define_fields_##call(void) \
328#define __dynamic_array(type, item, len) \ 354#define __dynamic_array(type, item, len) \
329 __data_offsets->item = __data_size + \ 355 __data_offsets->item = __data_size + \
330 offsetof(typeof(*entry), __data); \ 356 offsetof(typeof(*entry), __data); \
357 __data_offsets->item |= (len * sizeof(type)) << 16; \
331 __data_size += (len) * sizeof(type); 358 __data_size += (len) * sizeof(type);
332 359
333#undef __string 360#undef __string
@@ -433,13 +460,15 @@ static void ftrace_profile_disable_##call(struct ftrace_event_call *event_call)\
433 * { 460 * {
434 * struct ring_buffer_event *event; 461 * struct ring_buffer_event *event;
435 * struct ftrace_raw_<call> *entry; <-- defined in stage 1 462 * struct ftrace_raw_<call> *entry; <-- defined in stage 1
463 * struct ring_buffer *buffer;
436 * unsigned long irq_flags; 464 * unsigned long irq_flags;
437 * int pc; 465 * int pc;
438 * 466 *
439 * local_save_flags(irq_flags); 467 * local_save_flags(irq_flags);
440 * pc = preempt_count(); 468 * pc = preempt_count();
441 * 469 *
442 * event = trace_current_buffer_lock_reserve(event_<call>.id, 470 * event = trace_current_buffer_lock_reserve(&buffer,
471 * event_<call>.id,
443 * sizeof(struct ftrace_raw_<call>), 472 * sizeof(struct ftrace_raw_<call>),
444 * irq_flags, pc); 473 * irq_flags, pc);
445 * if (!event) 474 * if (!event)
@@ -449,7 +478,7 @@ static void ftrace_profile_disable_##call(struct ftrace_event_call *event_call)\
449 * <assign>; <-- Here we assign the entries by the __field and 478 * <assign>; <-- Here we assign the entries by the __field and
450 * __array macros. 479 * __array macros.
451 * 480 *
452 * trace_current_buffer_unlock_commit(event, irq_flags, pc); 481 * trace_current_buffer_unlock_commit(buffer, event, irq_flags, pc);
453 * } 482 * }
454 * 483 *
455 * static int ftrace_raw_reg_event_<call>(void) 484 * static int ftrace_raw_reg_event_<call>(void)
@@ -541,6 +570,7 @@ static void ftrace_raw_event_##call(proto) \
541 struct ftrace_event_call *event_call = &event_##call; \ 570 struct ftrace_event_call *event_call = &event_##call; \
542 struct ring_buffer_event *event; \ 571 struct ring_buffer_event *event; \
543 struct ftrace_raw_##call *entry; \ 572 struct ftrace_raw_##call *entry; \
573 struct ring_buffer *buffer; \
544 unsigned long irq_flags; \ 574 unsigned long irq_flags; \
545 int __data_size; \ 575 int __data_size; \
546 int pc; \ 576 int pc; \
@@ -550,7 +580,8 @@ static void ftrace_raw_event_##call(proto) \
550 \ 580 \
551 __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \ 581 __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \
552 \ 582 \
553 event = trace_current_buffer_lock_reserve(event_##call.id, \ 583 event = trace_current_buffer_lock_reserve(&buffer, \
584 event_##call.id, \
554 sizeof(*entry) + __data_size, \ 585 sizeof(*entry) + __data_size, \
555 irq_flags, pc); \ 586 irq_flags, pc); \
556 if (!event) \ 587 if (!event) \
@@ -562,11 +593,12 @@ static void ftrace_raw_event_##call(proto) \
562 \ 593 \
563 { assign; } \ 594 { assign; } \
564 \ 595 \
565 if (!filter_current_check_discard(event_call, entry, event)) \ 596 if (!filter_current_check_discard(buffer, event_call, entry, event)) \
566 trace_nowake_buffer_unlock_commit(event, irq_flags, pc); \ 597 trace_nowake_buffer_unlock_commit(buffer, \
598 event, irq_flags, pc); \
567} \ 599} \
568 \ 600 \
569static int ftrace_raw_reg_event_##call(void) \ 601static int ftrace_raw_reg_event_##call(void *ptr) \
570{ \ 602{ \
571 int ret; \ 603 int ret; \
572 \ 604 \
@@ -577,7 +609,7 @@ static int ftrace_raw_reg_event_##call(void) \
577 return ret; \ 609 return ret; \
578} \ 610} \
579 \ 611 \
580static void ftrace_raw_unreg_event_##call(void) \ 612static void ftrace_raw_unreg_event_##call(void *ptr) \
581{ \ 613{ \
582 unregister_trace_##call(ftrace_raw_event_##call); \ 614 unregister_trace_##call(ftrace_raw_event_##call); \
583} \ 615} \
@@ -595,7 +627,6 @@ static int ftrace_raw_init_event_##call(void) \
595 return -ENODEV; \ 627 return -ENODEV; \
596 event_##call.id = id; \ 628 event_##call.id = id; \
597 INIT_LIST_HEAD(&event_##call.fields); \ 629 INIT_LIST_HEAD(&event_##call.fields); \
598 init_preds(&event_##call); \
599 return 0; \ 630 return 0; \
600} \ 631} \
601 \ 632 \
generated by cgit v1.2.2 (git 2.25.0) at 2025-03-11 03:25:50 -0400