Commit | Line | Data |
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bc0c38d1 SR |
1 | #ifndef _LINUX_KERNEL_TRACE_H |
2 | #define _LINUX_KERNEL_TRACE_H | |
3 | ||
4 | #include <linux/fs.h> | |
60063497 | 5 | #include <linux/atomic.h> |
bc0c38d1 SR |
6 | #include <linux/sched.h> |
7 | #include <linux/clocksource.h> | |
3928a8a2 | 8 | #include <linux/ring_buffer.h> |
bd8ac686 | 9 | #include <linux/mmiotrace.h> |
4e5292ea | 10 | #include <linux/tracepoint.h> |
d13744cd | 11 | #include <linux/ftrace.h> |
24f1e32c | 12 | #include <linux/hw_breakpoint.h> |
9504504c | 13 | #include <linux/trace_seq.h> |
97f20251 | 14 | #include <linux/ftrace_event.h> |
9504504c | 15 | |
12ab74ee SR |
16 | #ifdef CONFIG_FTRACE_SYSCALLS |
17 | #include <asm/unistd.h> /* For NR_SYSCALLS */ | |
18 | #include <asm/syscall.h> /* some archs define it here */ | |
19 | #endif | |
20 | ||
72829bc3 TG |
21 | enum trace_type { |
22 | __TRACE_FIRST_TYPE = 0, | |
23 | ||
24 | TRACE_FN, | |
25 | TRACE_CTX, | |
26 | TRACE_WAKE, | |
27 | TRACE_STACK, | |
dd0e545f | 28 | TRACE_PRINT, |
48ead020 | 29 | TRACE_BPRINT, |
bd8ac686 PP |
30 | TRACE_MMIO_RW, |
31 | TRACE_MMIO_MAP, | |
9f029e83 | 32 | TRACE_BRANCH, |
287b6e68 FW |
33 | TRACE_GRAPH_RET, |
34 | TRACE_GRAPH_ENT, | |
02b67518 | 35 | TRACE_USER_STACK, |
c71a8961 | 36 | TRACE_BLK, |
72829bc3 | 37 | |
f0868d1e | 38 | __TRACE_LAST_TYPE, |
72829bc3 TG |
39 | }; |
40 | ||
bc0c38d1 | 41 | |
0a1c49db SR |
42 | #undef __field |
43 | #define __field(type, item) type item; | |
86387f7e | 44 | |
d7315094 SR |
45 | #undef __field_struct |
46 | #define __field_struct(type, item) __field(type, item) | |
86387f7e | 47 | |
d7315094 SR |
48 | #undef __field_desc |
49 | #define __field_desc(type, container, item) | |
02b67518 | 50 | |
0a1c49db SR |
51 | #undef __array |
52 | #define __array(type, item, size) type item[size]; | |
1427cdf0 | 53 | |
d7315094 SR |
54 | #undef __array_desc |
55 | #define __array_desc(type, container, item, size) | |
777e208d | 56 | |
0a1c49db SR |
57 | #undef __dynamic_array |
58 | #define __dynamic_array(type, item) type item[]; | |
777e208d | 59 | |
0a1c49db SR |
60 | #undef F_STRUCT |
61 | #define F_STRUCT(args...) args | |
74239072 | 62 | |
0a1c49db | 63 | #undef FTRACE_ENTRY |
02aa3162 JO |
64 | #define FTRACE_ENTRY(name, struct_name, id, tstruct, print, filter) \ |
65 | struct struct_name { \ | |
66 | struct trace_entry ent; \ | |
67 | tstruct \ | |
0a1c49db | 68 | } |
777e208d | 69 | |
0a1c49db SR |
70 | #undef TP_ARGS |
71 | #define TP_ARGS(args...) args | |
52f232cb | 72 | |
0a1c49db | 73 | #undef FTRACE_ENTRY_DUP |
02aa3162 | 74 | #define FTRACE_ENTRY_DUP(name, name_struct, id, tstruct, printk, filter) |
1e9b51c2 | 75 | |
e59a0bff | 76 | #undef FTRACE_ENTRY_REG |
02aa3162 JO |
77 | #define FTRACE_ENTRY_REG(name, struct_name, id, tstruct, print, \ |
78 | filter, regfn) \ | |
79 | FTRACE_ENTRY(name, struct_name, id, PARAMS(tstruct), PARAMS(print), \ | |
80 | filter) | |
e59a0bff | 81 | |
0a1c49db | 82 | #include "trace_entries.h" |
36994e58 | 83 | |
0a1c49db SR |
84 | /* |
85 | * syscalls are special, and need special handling, this is why | |
86 | * they are not included in trace_entries.h | |
87 | */ | |
bed1ffca FW |
88 | struct syscall_trace_enter { |
89 | struct trace_entry ent; | |
90 | int nr; | |
91 | unsigned long args[]; | |
92 | }; | |
93 | ||
94 | struct syscall_trace_exit { | |
95 | struct trace_entry ent; | |
96 | int nr; | |
99df5a6a | 97 | long ret; |
bed1ffca FW |
98 | }; |
99 | ||
93ccae7a | 100 | struct kprobe_trace_entry_head { |
413d37d1 MH |
101 | struct trace_entry ent; |
102 | unsigned long ip; | |
413d37d1 MH |
103 | }; |
104 | ||
93ccae7a | 105 | struct kretprobe_trace_entry_head { |
413d37d1 MH |
106 | struct trace_entry ent; |
107 | unsigned long func; | |
108 | unsigned long ret_ip; | |
413d37d1 MH |
109 | }; |
110 | ||
f3f096cf SD |
111 | struct uprobe_trace_entry_head { |
112 | struct trace_entry ent; | |
113 | unsigned long ip; | |
114 | }; | |
115 | ||
fc5e27ae PP |
116 | /* |
117 | * trace_flag_type is an enumeration that holds different | |
118 | * states when a trace occurs. These are: | |
9244489a | 119 | * IRQS_OFF - interrupts were disabled |
9de36825 | 120 | * IRQS_NOSUPPORT - arch does not support irqs_disabled_flags |
bd9cfca9 | 121 | * NEED_RESCHED - reschedule is requested |
9244489a SR |
122 | * HARDIRQ - inside an interrupt handler |
123 | * SOFTIRQ - inside a softirq handler | |
fc5e27ae PP |
124 | */ |
125 | enum trace_flag_type { | |
126 | TRACE_FLAG_IRQS_OFF = 0x01, | |
9244489a SR |
127 | TRACE_FLAG_IRQS_NOSUPPORT = 0x02, |
128 | TRACE_FLAG_NEED_RESCHED = 0x04, | |
129 | TRACE_FLAG_HARDIRQ = 0x08, | |
130 | TRACE_FLAG_SOFTIRQ = 0x10, | |
fc5e27ae PP |
131 | }; |
132 | ||
5bf9a1ee | 133 | #define TRACE_BUF_SIZE 1024 |
bc0c38d1 | 134 | |
2b6080f2 SR |
135 | struct trace_array; |
136 | ||
137 | struct trace_cpu { | |
138 | struct trace_array *tr; | |
139 | struct dentry *dir; | |
140 | int cpu; | |
141 | }; | |
142 | ||
bc0c38d1 SR |
143 | /* |
144 | * The CPU trace array - it consists of thousands of trace entries | |
145 | * plus some other descriptor data: (for example which task started | |
146 | * the trace, etc.) | |
147 | */ | |
148 | struct trace_array_cpu { | |
2b6080f2 | 149 | struct trace_cpu trace_cpu; |
bc0c38d1 | 150 | atomic_t disabled; |
2cadf913 | 151 | void *buffer_page; /* ring buffer spare */ |
4e3c3333 | 152 | |
438ced17 | 153 | unsigned long entries; |
bc0c38d1 SR |
154 | unsigned long saved_latency; |
155 | unsigned long critical_start; | |
156 | unsigned long critical_end; | |
157 | unsigned long critical_sequence; | |
158 | unsigned long nice; | |
159 | unsigned long policy; | |
160 | unsigned long rt_priority; | |
2f26ebd5 | 161 | unsigned long skipped_entries; |
bc0c38d1 SR |
162 | cycle_t preempt_timestamp; |
163 | pid_t pid; | |
d20b92ab | 164 | kuid_t uid; |
bc0c38d1 SR |
165 | char comm[TASK_COMM_LEN]; |
166 | }; | |
167 | ||
2b6080f2 SR |
168 | struct tracer; |
169 | ||
bc0c38d1 SR |
170 | /* |
171 | * The trace array - an array of per-CPU trace arrays. This is the | |
172 | * highest level data structure that individual tracers deal with. | |
173 | * They have on/off state as well: | |
174 | */ | |
175 | struct trace_array { | |
3928a8a2 | 176 | struct ring_buffer *buffer; |
ae63b31e | 177 | struct list_head list; |
277ba044 | 178 | char *name; |
bc0c38d1 | 179 | int cpu; |
499e5470 | 180 | int buffer_disabled; |
2b6080f2 | 181 | struct trace_cpu trace_cpu; /* place holder */ |
12ab74ee SR |
182 | #ifdef CONFIG_FTRACE_SYSCALLS |
183 | int sys_refcount_enter; | |
184 | int sys_refcount_exit; | |
185 | DECLARE_BITMAP(enabled_enter_syscalls, NR_syscalls); | |
186 | DECLARE_BITMAP(enabled_exit_syscalls, NR_syscalls); | |
187 | #endif | |
2b6080f2 SR |
188 | int stop_count; |
189 | int clock_id; | |
190 | struct tracer *current_trace; | |
ae63b31e | 191 | unsigned int flags; |
bc0c38d1 | 192 | cycle_t time_start; |
2b6080f2 | 193 | raw_spinlock_t start_lock; |
ae63b31e | 194 | struct dentry *dir; |
2b6080f2 SR |
195 | struct dentry *options; |
196 | struct dentry *percpu_dir; | |
ae63b31e SR |
197 | struct dentry *event_dir; |
198 | struct list_head systems; | |
199 | struct list_head events; | |
b3806b43 | 200 | struct task_struct *waiter; |
34ef61b1 | 201 | struct trace_array_cpu __percpu *data; |
bc0c38d1 SR |
202 | }; |
203 | ||
ae63b31e SR |
204 | enum { |
205 | TRACE_ARRAY_FL_GLOBAL = (1 << 0) | |
206 | }; | |
207 | ||
208 | extern struct list_head ftrace_trace_arrays; | |
209 | ||
210 | /* | |
211 | * The global tracer (top) should be the first trace array added, | |
212 | * but we check the flag anyway. | |
213 | */ | |
214 | static inline struct trace_array *top_trace_array(void) | |
215 | { | |
216 | struct trace_array *tr; | |
217 | ||
218 | tr = list_entry(ftrace_trace_arrays.prev, | |
219 | typeof(*tr), list); | |
220 | WARN_ON(!(tr->flags & TRACE_ARRAY_FL_GLOBAL)); | |
221 | return tr; | |
222 | } | |
223 | ||
7104f300 SR |
224 | #define FTRACE_CMP_TYPE(var, type) \ |
225 | __builtin_types_compatible_p(typeof(var), type *) | |
226 | ||
227 | #undef IF_ASSIGN | |
228 | #define IF_ASSIGN(var, entry, etype, id) \ | |
229 | if (FTRACE_CMP_TYPE(var, etype)) { \ | |
230 | var = (typeof(var))(entry); \ | |
231 | WARN_ON(id && (entry)->type != id); \ | |
232 | break; \ | |
233 | } | |
234 | ||
235 | /* Will cause compile errors if type is not found. */ | |
236 | extern void __ftrace_bad_type(void); | |
237 | ||
238 | /* | |
239 | * The trace_assign_type is a verifier that the entry type is | |
240 | * the same as the type being assigned. To add new types simply | |
241 | * add a line with the following format: | |
242 | * | |
243 | * IF_ASSIGN(var, ent, type, id); | |
244 | * | |
245 | * Where "type" is the trace type that includes the trace_entry | |
246 | * as the "ent" item. And "id" is the trace identifier that is | |
247 | * used in the trace_type enum. | |
248 | * | |
249 | * If the type can have more than one id, then use zero. | |
250 | */ | |
251 | #define trace_assign_type(var, ent) \ | |
252 | do { \ | |
253 | IF_ASSIGN(var, ent, struct ftrace_entry, TRACE_FN); \ | |
254 | IF_ASSIGN(var, ent, struct ctx_switch_entry, 0); \ | |
7104f300 | 255 | IF_ASSIGN(var, ent, struct stack_entry, TRACE_STACK); \ |
02b67518 | 256 | IF_ASSIGN(var, ent, struct userstack_entry, TRACE_USER_STACK);\ |
7104f300 | 257 | IF_ASSIGN(var, ent, struct print_entry, TRACE_PRINT); \ |
48ead020 | 258 | IF_ASSIGN(var, ent, struct bprint_entry, TRACE_BPRINT); \ |
7104f300 SR |
259 | IF_ASSIGN(var, ent, struct trace_mmiotrace_rw, \ |
260 | TRACE_MMIO_RW); \ | |
261 | IF_ASSIGN(var, ent, struct trace_mmiotrace_map, \ | |
262 | TRACE_MMIO_MAP); \ | |
9f029e83 | 263 | IF_ASSIGN(var, ent, struct trace_branch, TRACE_BRANCH); \ |
287b6e68 FW |
264 | IF_ASSIGN(var, ent, struct ftrace_graph_ent_entry, \ |
265 | TRACE_GRAPH_ENT); \ | |
266 | IF_ASSIGN(var, ent, struct ftrace_graph_ret_entry, \ | |
267 | TRACE_GRAPH_RET); \ | |
7104f300 SR |
268 | __ftrace_bad_type(); \ |
269 | } while (0) | |
2c4f035f | 270 | |
adf9f195 FW |
271 | /* |
272 | * An option specific to a tracer. This is a boolean value. | |
273 | * The bit is the bit index that sets its value on the | |
274 | * flags value in struct tracer_flags. | |
275 | */ | |
276 | struct tracer_opt { | |
9de36825 IM |
277 | const char *name; /* Will appear on the trace_options file */ |
278 | u32 bit; /* Mask assigned in val field in tracer_flags */ | |
adf9f195 FW |
279 | }; |
280 | ||
281 | /* | |
282 | * The set of specific options for a tracer. Your tracer | |
283 | * have to set the initial value of the flags val. | |
284 | */ | |
285 | struct tracer_flags { | |
286 | u32 val; | |
9de36825 | 287 | struct tracer_opt *opts; |
adf9f195 FW |
288 | }; |
289 | ||
290 | /* Makes more easy to define a tracer opt */ | |
291 | #define TRACER_OPT(s, b) .name = #s, .bit = b | |
292 | ||
034939b6 | 293 | |
6eaaa5d5 FW |
294 | /** |
295 | * struct tracer - a specific tracer and its callbacks to interact with debugfs | |
296 | * @name: the name chosen to select it on the available_tracers file | |
297 | * @init: called when one switches to this tracer (echo name > current_tracer) | |
298 | * @reset: called when one switches to another tracer | |
299 | * @start: called when tracing is unpaused (echo 1 > tracing_enabled) | |
300 | * @stop: called when tracing is paused (echo 0 > tracing_enabled) | |
301 | * @open: called when the trace file is opened | |
302 | * @pipe_open: called when the trace_pipe file is opened | |
303 | * @wait_pipe: override how the user waits for traces on trace_pipe | |
304 | * @close: called when the trace file is released | |
c521efd1 | 305 | * @pipe_close: called when the trace_pipe file is released |
6eaaa5d5 FW |
306 | * @read: override the default read callback on trace_pipe |
307 | * @splice_read: override the default splice_read callback on trace_pipe | |
308 | * @selftest: selftest to run on boot (see trace_selftest.c) | |
309 | * @print_headers: override the first lines that describe your columns | |
310 | * @print_line: callback that prints a trace | |
311 | * @set_flag: signals one of your private flags changed (trace_options file) | |
312 | * @flags: your private flags | |
bc0c38d1 SR |
313 | */ |
314 | struct tracer { | |
315 | const char *name; | |
1c80025a | 316 | int (*init)(struct trace_array *tr); |
bc0c38d1 | 317 | void (*reset)(struct trace_array *tr); |
9036990d SR |
318 | void (*start)(struct trace_array *tr); |
319 | void (*stop)(struct trace_array *tr); | |
bc0c38d1 | 320 | void (*open)(struct trace_iterator *iter); |
107bad8b | 321 | void (*pipe_open)(struct trace_iterator *iter); |
6eaaa5d5 | 322 | void (*wait_pipe)(struct trace_iterator *iter); |
bc0c38d1 | 323 | void (*close)(struct trace_iterator *iter); |
c521efd1 | 324 | void (*pipe_close)(struct trace_iterator *iter); |
107bad8b SR |
325 | ssize_t (*read)(struct trace_iterator *iter, |
326 | struct file *filp, char __user *ubuf, | |
327 | size_t cnt, loff_t *ppos); | |
3c56819b EGM |
328 | ssize_t (*splice_read)(struct trace_iterator *iter, |
329 | struct file *filp, | |
330 | loff_t *ppos, | |
331 | struct pipe_inode_info *pipe, | |
332 | size_t len, | |
333 | unsigned int flags); | |
60a11774 SR |
334 | #ifdef CONFIG_FTRACE_STARTUP_TEST |
335 | int (*selftest)(struct tracer *trace, | |
336 | struct trace_array *tr); | |
337 | #endif | |
8bba1bf5 | 338 | void (*print_header)(struct seq_file *m); |
2c4f035f | 339 | enum print_line_t (*print_line)(struct trace_iterator *iter); |
adf9f195 FW |
340 | /* If you handled the flag setting, return 0 */ |
341 | int (*set_flag)(u32 old_flags, u32 bit, int set); | |
613f04a0 SRRH |
342 | /* Return 0 if OK with change, else return non-zero */ |
343 | int (*flag_changed)(struct tracer *tracer, | |
344 | u32 mask, int set); | |
bc0c38d1 | 345 | struct tracer *next; |
9de36825 | 346 | struct tracer_flags *flags; |
f43c738b HT |
347 | bool print_max; |
348 | bool use_max_tr; | |
debdd57f | 349 | bool allocated_snapshot; |
613f04a0 | 350 | bool enabled; |
bc0c38d1 SR |
351 | }; |
352 | ||
f9520750 | 353 | |
e4a3f541 | 354 | /* Only current can touch trace_recursion */ |
e4a3f541 | 355 | |
edc15caf SR |
356 | /* |
357 | * For function tracing recursion: | |
358 | * The order of these bits are important. | |
359 | * | |
360 | * When function tracing occurs, the following steps are made: | |
361 | * If arch does not support a ftrace feature: | |
362 | * call internal function (uses INTERNAL bits) which calls... | |
363 | * If callback is registered to the "global" list, the list | |
364 | * function is called and recursion checks the GLOBAL bits. | |
365 | * then this function calls... | |
366 | * The function callback, which can use the FTRACE bits to | |
367 | * check for recursion. | |
368 | * | |
369 | * Now if the arch does not suppport a feature, and it calls | |
370 | * the global list function which calls the ftrace callback | |
371 | * all three of these steps will do a recursion protection. | |
372 | * There's no reason to do one if the previous caller already | |
373 | * did. The recursion that we are protecting against will | |
374 | * go through the same steps again. | |
375 | * | |
376 | * To prevent the multiple recursion checks, if a recursion | |
377 | * bit is set that is higher than the MAX bit of the current | |
378 | * check, then we know that the check was made by the previous | |
379 | * caller, and we can skip the current check. | |
380 | */ | |
e46cbf75 | 381 | enum { |
567cd4da SR |
382 | TRACE_BUFFER_BIT, |
383 | TRACE_BUFFER_NMI_BIT, | |
384 | TRACE_BUFFER_IRQ_BIT, | |
385 | TRACE_BUFFER_SIRQ_BIT, | |
386 | ||
387 | /* Start of function recursion bits */ | |
388 | TRACE_FTRACE_BIT, | |
edc15caf SR |
389 | TRACE_FTRACE_NMI_BIT, |
390 | TRACE_FTRACE_IRQ_BIT, | |
391 | TRACE_FTRACE_SIRQ_BIT, | |
e46cbf75 | 392 | |
edc15caf | 393 | /* GLOBAL_BITs must be greater than FTRACE_BITs */ |
e46cbf75 SR |
394 | TRACE_GLOBAL_BIT, |
395 | TRACE_GLOBAL_NMI_BIT, | |
396 | TRACE_GLOBAL_IRQ_BIT, | |
397 | TRACE_GLOBAL_SIRQ_BIT, | |
398 | ||
edc15caf SR |
399 | /* INTERNAL_BITs must be greater than GLOBAL_BITs */ |
400 | TRACE_INTERNAL_BIT, | |
401 | TRACE_INTERNAL_NMI_BIT, | |
402 | TRACE_INTERNAL_IRQ_BIT, | |
403 | TRACE_INTERNAL_SIRQ_BIT, | |
404 | ||
e46cbf75 | 405 | TRACE_CONTROL_BIT, |
e248491a | 406 | |
e4a3f541 SR |
407 | /* |
408 | * Abuse of the trace_recursion. | |
409 | * As we need a way to maintain state if we are tracing the function | |
410 | * graph in irq because we want to trace a particular function that | |
411 | * was called in irq context but we have irq tracing off. Since this | |
412 | * can only be modified by current, we can reuse trace_recursion. | |
413 | */ | |
e46cbf75 SR |
414 | TRACE_IRQ_BIT, |
415 | }; | |
e4a3f541 | 416 | |
e46cbf75 SR |
417 | #define trace_recursion_set(bit) do { (current)->trace_recursion |= (1<<(bit)); } while (0) |
418 | #define trace_recursion_clear(bit) do { (current)->trace_recursion &= ~(1<<(bit)); } while (0) | |
419 | #define trace_recursion_test(bit) ((current)->trace_recursion & (1<<(bit))) | |
e4a3f541 | 420 | |
edc15caf SR |
421 | #define TRACE_CONTEXT_BITS 4 |
422 | ||
423 | #define TRACE_FTRACE_START TRACE_FTRACE_BIT | |
424 | #define TRACE_FTRACE_MAX ((1 << (TRACE_FTRACE_START + TRACE_CONTEXT_BITS)) - 1) | |
425 | ||
426 | #define TRACE_GLOBAL_START TRACE_GLOBAL_BIT | |
427 | #define TRACE_GLOBAL_MAX ((1 << (TRACE_GLOBAL_START + TRACE_CONTEXT_BITS)) - 1) | |
428 | ||
429 | #define TRACE_LIST_START TRACE_INTERNAL_BIT | |
430 | #define TRACE_LIST_MAX ((1 << (TRACE_LIST_START + TRACE_CONTEXT_BITS)) - 1) | |
431 | ||
432 | #define TRACE_CONTEXT_MASK TRACE_LIST_MAX | |
433 | ||
434 | static __always_inline int trace_get_context_bit(void) | |
435 | { | |
436 | int bit; | |
437 | ||
438 | if (in_interrupt()) { | |
439 | if (in_nmi()) | |
440 | bit = 0; | |
441 | ||
442 | else if (in_irq()) | |
443 | bit = 1; | |
444 | else | |
445 | bit = 2; | |
446 | } else | |
447 | bit = 3; | |
448 | ||
449 | return bit; | |
450 | } | |
451 | ||
452 | static __always_inline int trace_test_and_set_recursion(int start, int max) | |
453 | { | |
454 | unsigned int val = current->trace_recursion; | |
455 | int bit; | |
456 | ||
457 | /* A previous recursion check was made */ | |
458 | if ((val & TRACE_CONTEXT_MASK) > max) | |
459 | return 0; | |
460 | ||
461 | bit = trace_get_context_bit() + start; | |
462 | if (unlikely(val & (1 << bit))) | |
463 | return -1; | |
464 | ||
465 | val |= 1 << bit; | |
466 | current->trace_recursion = val; | |
467 | barrier(); | |
468 | ||
469 | return bit; | |
470 | } | |
471 | ||
472 | static __always_inline void trace_clear_recursion(int bit) | |
473 | { | |
474 | unsigned int val = current->trace_recursion; | |
475 | ||
476 | if (!bit) | |
477 | return; | |
478 | ||
479 | bit = 1 << bit; | |
480 | val &= ~bit; | |
481 | ||
482 | barrier(); | |
483 | current->trace_recursion = val; | |
484 | } | |
485 | ||
6d158a81 SR |
486 | static inline struct ring_buffer_iter * |
487 | trace_buffer_iter(struct trace_iterator *iter, int cpu) | |
488 | { | |
489 | if (iter->buffer_iter && iter->buffer_iter[cpu]) | |
490 | return iter->buffer_iter[cpu]; | |
491 | return NULL; | |
492 | } | |
493 | ||
b6f11df2 | 494 | int tracer_init(struct tracer *t, struct trace_array *tr); |
9036990d | 495 | int tracing_is_enabled(void); |
3928a8a2 | 496 | void tracing_reset(struct trace_array *tr, int cpu); |
213cc060 | 497 | void tracing_reset_online_cpus(struct trace_array *tr); |
9456f0fa SR |
498 | void tracing_reset_current(int cpu); |
499 | void tracing_reset_current_online_cpus(void); | |
bc0c38d1 | 500 | int tracing_open_generic(struct inode *inode, struct file *filp); |
5452af66 | 501 | struct dentry *trace_create_file(const char *name, |
f4ae40a6 | 502 | umode_t mode, |
5452af66 FW |
503 | struct dentry *parent, |
504 | void *data, | |
505 | const struct file_operations *fops); | |
506 | ||
2b6080f2 | 507 | struct dentry *tracing_init_dentry_tr(struct trace_array *tr); |
bc0c38d1 | 508 | struct dentry *tracing_init_dentry(void); |
d618b3e6 | 509 | |
51a763dd ACM |
510 | struct ring_buffer_event; |
511 | ||
e77405ad SR |
512 | struct ring_buffer_event * |
513 | trace_buffer_lock_reserve(struct ring_buffer *buffer, | |
514 | int type, | |
515 | unsigned long len, | |
516 | unsigned long flags, | |
517 | int pc); | |
51a763dd | 518 | |
45dcd8b8 PP |
519 | struct trace_entry *tracing_get_trace_entry(struct trace_array *tr, |
520 | struct trace_array_cpu *data); | |
c4a8e8be FW |
521 | |
522 | struct trace_entry *trace_find_next_entry(struct trace_iterator *iter, | |
523 | int *ent_cpu, u64 *ent_ts); | |
524 | ||
7ffbd48d SR |
525 | void __buffer_unlock_commit(struct ring_buffer *buffer, |
526 | struct ring_buffer_event *event); | |
527 | ||
955b61e5 JW |
528 | int trace_empty(struct trace_iterator *iter); |
529 | ||
530 | void *trace_find_next_entry_inc(struct trace_iterator *iter); | |
531 | ||
532 | void trace_init_global_iter(struct trace_iterator *iter); | |
533 | ||
534 | void tracing_iter_reset(struct trace_iterator *iter, int cpu); | |
535 | ||
6eaaa5d5 FW |
536 | void poll_wait_pipe(struct trace_iterator *iter); |
537 | ||
bc0c38d1 SR |
538 | void ftrace(struct trace_array *tr, |
539 | struct trace_array_cpu *data, | |
540 | unsigned long ip, | |
541 | unsigned long parent_ip, | |
38697053 | 542 | unsigned long flags, int pc); |
bc0c38d1 | 543 | void tracing_sched_switch_trace(struct trace_array *tr, |
bc0c38d1 SR |
544 | struct task_struct *prev, |
545 | struct task_struct *next, | |
38697053 | 546 | unsigned long flags, int pc); |
57422797 IM |
547 | |
548 | void tracing_sched_wakeup_trace(struct trace_array *tr, | |
57422797 IM |
549 | struct task_struct *wakee, |
550 | struct task_struct *cur, | |
38697053 | 551 | unsigned long flags, int pc); |
6fb44b71 | 552 | void trace_function(struct trace_array *tr, |
6fb44b71 SR |
553 | unsigned long ip, |
554 | unsigned long parent_ip, | |
38697053 | 555 | unsigned long flags, int pc); |
0a772620 JO |
556 | void trace_graph_function(struct trace_array *tr, |
557 | unsigned long ip, | |
558 | unsigned long parent_ip, | |
559 | unsigned long flags, int pc); | |
7e9a49ef | 560 | void trace_latency_header(struct seq_file *m); |
62b915f1 JO |
561 | void trace_default_header(struct seq_file *m); |
562 | void print_trace_header(struct seq_file *m, struct trace_iterator *iter); | |
563 | int trace_empty(struct trace_iterator *iter); | |
bc0c38d1 | 564 | |
287b6e68 | 565 | void trace_graph_return(struct ftrace_graph_ret *trace); |
e49dc19c | 566 | int trace_graph_entry(struct ftrace_graph_ent *trace); |
1a0799a8 | 567 | void set_graph_array(struct trace_array *tr); |
1e9b51c2 | 568 | |
41bc8144 SR |
569 | void tracing_start_cmdline_record(void); |
570 | void tracing_stop_cmdline_record(void); | |
e168e051 SR |
571 | void tracing_sched_switch_assign_trace(struct trace_array *tr); |
572 | void tracing_stop_sched_switch_record(void); | |
573 | void tracing_start_sched_switch_record(void); | |
bc0c38d1 | 574 | int register_tracer(struct tracer *type); |
b5130b1e | 575 | int is_tracing_stopped(void); |
955b61e5 JW |
576 | |
577 | extern cpumask_var_t __read_mostly tracing_buffer_mask; | |
578 | ||
579 | #define for_each_tracing_cpu(cpu) \ | |
580 | for_each_cpu(cpu, tracing_buffer_mask) | |
bc0c38d1 SR |
581 | |
582 | extern unsigned long nsecs_to_usecs(unsigned long nsecs); | |
583 | ||
0e950173 TB |
584 | extern unsigned long tracing_thresh; |
585 | ||
5d4a9dba | 586 | #ifdef CONFIG_TRACER_MAX_TRACE |
bc0c38d1 | 587 | extern unsigned long tracing_max_latency; |
bc0c38d1 SR |
588 | |
589 | void update_max_tr(struct trace_array *tr, struct task_struct *tsk, int cpu); | |
590 | void update_max_tr_single(struct trace_array *tr, | |
591 | struct task_struct *tsk, int cpu); | |
5d4a9dba | 592 | #endif /* CONFIG_TRACER_MAX_TRACE */ |
bc0c38d1 | 593 | |
c0a0d0d3 | 594 | #ifdef CONFIG_STACKTRACE |
e77405ad | 595 | void ftrace_trace_stack(struct ring_buffer *buffer, unsigned long flags, |
c0a0d0d3 FW |
596 | int skip, int pc); |
597 | ||
1fd8df2c MH |
598 | void ftrace_trace_stack_regs(struct ring_buffer *buffer, unsigned long flags, |
599 | int skip, int pc, struct pt_regs *regs); | |
600 | ||
e77405ad | 601 | void ftrace_trace_userstack(struct ring_buffer *buffer, unsigned long flags, |
c0a0d0d3 FW |
602 | int pc); |
603 | ||
604 | void __trace_stack(struct trace_array *tr, unsigned long flags, int skip, | |
605 | int pc); | |
606 | #else | |
e1f7992e | 607 | static inline void ftrace_trace_stack(struct ring_buffer *buffer, |
c0a0d0d3 FW |
608 | unsigned long flags, int skip, int pc) |
609 | { | |
610 | } | |
611 | ||
1fd8df2c MH |
612 | static inline void ftrace_trace_stack_regs(struct ring_buffer *buffer, |
613 | unsigned long flags, int skip, | |
614 | int pc, struct pt_regs *regs) | |
615 | { | |
616 | } | |
617 | ||
e1f7992e | 618 | static inline void ftrace_trace_userstack(struct ring_buffer *buffer, |
c0a0d0d3 FW |
619 | unsigned long flags, int pc) |
620 | { | |
621 | } | |
622 | ||
623 | static inline void __trace_stack(struct trace_array *tr, unsigned long flags, | |
624 | int skip, int pc) | |
625 | { | |
626 | } | |
627 | #endif /* CONFIG_STACKTRACE */ | |
53614991 | 628 | |
e309b41d | 629 | extern cycle_t ftrace_now(int cpu); |
bc0c38d1 | 630 | |
4ca53085 | 631 | extern void trace_find_cmdline(int pid, char comm[]); |
f7d48cbd | 632 | |
bc0c38d1 SR |
633 | #ifdef CONFIG_DYNAMIC_FTRACE |
634 | extern unsigned long ftrace_update_tot_cnt; | |
ad97772a | 635 | #endif |
d05cdb25 SR |
636 | #define DYN_FTRACE_TEST_NAME trace_selftest_dynamic_test_func |
637 | extern int DYN_FTRACE_TEST_NAME(void); | |
95950c2e SR |
638 | #define DYN_FTRACE_TEST_NAME2 trace_selftest_dynamic_test_func2 |
639 | extern int DYN_FTRACE_TEST_NAME2(void); | |
bc0c38d1 | 640 | |
020e5f85 LZ |
641 | extern int ring_buffer_expanded; |
642 | extern bool tracing_selftest_disabled; | |
9288f99a | 643 | DECLARE_PER_CPU(int, ftrace_cpu_disabled); |
020e5f85 | 644 | |
60a11774 | 645 | #ifdef CONFIG_FTRACE_STARTUP_TEST |
60a11774 SR |
646 | extern int trace_selftest_startup_function(struct tracer *trace, |
647 | struct trace_array *tr); | |
7447dce9 FW |
648 | extern int trace_selftest_startup_function_graph(struct tracer *trace, |
649 | struct trace_array *tr); | |
60a11774 SR |
650 | extern int trace_selftest_startup_irqsoff(struct tracer *trace, |
651 | struct trace_array *tr); | |
60a11774 SR |
652 | extern int trace_selftest_startup_preemptoff(struct tracer *trace, |
653 | struct trace_array *tr); | |
60a11774 SR |
654 | extern int trace_selftest_startup_preemptirqsoff(struct tracer *trace, |
655 | struct trace_array *tr); | |
60a11774 SR |
656 | extern int trace_selftest_startup_wakeup(struct tracer *trace, |
657 | struct trace_array *tr); | |
fb1b6d8b SN |
658 | extern int trace_selftest_startup_nop(struct tracer *trace, |
659 | struct trace_array *tr); | |
60a11774 SR |
660 | extern int trace_selftest_startup_sched_switch(struct tracer *trace, |
661 | struct trace_array *tr); | |
80e5ea45 SR |
662 | extern int trace_selftest_startup_branch(struct tracer *trace, |
663 | struct trace_array *tr); | |
60a11774 SR |
664 | #endif /* CONFIG_FTRACE_STARTUP_TEST */ |
665 | ||
c7aafc54 | 666 | extern void *head_page(struct trace_array_cpu *data); |
cf8e3474 | 667 | extern unsigned long long ns2usecs(cycle_t nsec); |
1fd8f2a3 | 668 | extern int |
40ce74f1 | 669 | trace_vbprintk(unsigned long ip, const char *fmt, va_list args); |
48ead020 | 670 | extern int |
40ce74f1 | 671 | trace_vprintk(unsigned long ip, const char *fmt, va_list args); |
659372d3 SR |
672 | extern int |
673 | trace_array_vprintk(struct trace_array *tr, | |
674 | unsigned long ip, const char *fmt, va_list args); | |
675 | int trace_array_printk(struct trace_array *tr, | |
676 | unsigned long ip, const char *fmt, ...); | |
955b61e5 JW |
677 | void trace_printk_seq(struct trace_seq *s); |
678 | enum print_line_t print_trace_line(struct trace_iterator *iter); | |
c7aafc54 | 679 | |
4e655519 IM |
680 | extern unsigned long trace_flags; |
681 | ||
5079f326 Z |
682 | extern int trace_clock_id; |
683 | ||
15e6cb36 | 684 | /* Standard output formatting function used for function return traces */ |
fb52607a | 685 | #ifdef CONFIG_FUNCTION_GRAPH_TRACER |
62b915f1 JO |
686 | |
687 | /* Flag options */ | |
688 | #define TRACE_GRAPH_PRINT_OVERRUN 0x1 | |
689 | #define TRACE_GRAPH_PRINT_CPU 0x2 | |
690 | #define TRACE_GRAPH_PRINT_OVERHEAD 0x4 | |
691 | #define TRACE_GRAPH_PRINT_PROC 0x8 | |
692 | #define TRACE_GRAPH_PRINT_DURATION 0x10 | |
693 | #define TRACE_GRAPH_PRINT_ABS_TIME 0x20 | |
694 | ||
d7a8d9e9 JO |
695 | extern enum print_line_t |
696 | print_graph_function_flags(struct trace_iterator *iter, u32 flags); | |
697 | extern void print_graph_headers_flags(struct seq_file *s, u32 flags); | |
0706f1c4 SR |
698 | extern enum print_line_t |
699 | trace_print_graph_duration(unsigned long long duration, struct trace_seq *s); | |
62b915f1 JO |
700 | extern void graph_trace_open(struct trace_iterator *iter); |
701 | extern void graph_trace_close(struct trace_iterator *iter); | |
702 | extern int __trace_graph_entry(struct trace_array *tr, | |
703 | struct ftrace_graph_ent *trace, | |
704 | unsigned long flags, int pc); | |
705 | extern void __trace_graph_return(struct trace_array *tr, | |
706 | struct ftrace_graph_ret *trace, | |
707 | unsigned long flags, int pc); | |
708 | ||
ea4e2bc4 SR |
709 | |
710 | #ifdef CONFIG_DYNAMIC_FTRACE | |
711 | /* TODO: make this variable */ | |
712 | #define FTRACE_GRAPH_MAX_FUNCS 32 | |
c7c6b1fe | 713 | extern int ftrace_graph_filter_enabled; |
ea4e2bc4 SR |
714 | extern int ftrace_graph_count; |
715 | extern unsigned long ftrace_graph_funcs[FTRACE_GRAPH_MAX_FUNCS]; | |
716 | ||
717 | static inline int ftrace_graph_addr(unsigned long addr) | |
718 | { | |
719 | int i; | |
720 | ||
c7c6b1fe | 721 | if (!ftrace_graph_filter_enabled) |
ea4e2bc4 SR |
722 | return 1; |
723 | ||
724 | for (i = 0; i < ftrace_graph_count; i++) { | |
e4a3f541 SR |
725 | if (addr == ftrace_graph_funcs[i]) { |
726 | /* | |
727 | * If no irqs are to be traced, but a set_graph_function | |
728 | * is set, and called by an interrupt handler, we still | |
729 | * want to trace it. | |
730 | */ | |
731 | if (in_irq()) | |
732 | trace_recursion_set(TRACE_IRQ_BIT); | |
733 | else | |
734 | trace_recursion_clear(TRACE_IRQ_BIT); | |
ea4e2bc4 | 735 | return 1; |
e4a3f541 | 736 | } |
ea4e2bc4 SR |
737 | } |
738 | ||
739 | return 0; | |
740 | } | |
15e6cb36 | 741 | #else |
6b253930 IM |
742 | static inline int ftrace_graph_addr(unsigned long addr) |
743 | { | |
744 | return 1; | |
ea4e2bc4 SR |
745 | } |
746 | #endif /* CONFIG_DYNAMIC_FTRACE */ | |
ea4e2bc4 | 747 | #else /* CONFIG_FUNCTION_GRAPH_TRACER */ |
15e6cb36 | 748 | static inline enum print_line_t |
d7a8d9e9 | 749 | print_graph_function_flags(struct trace_iterator *iter, u32 flags) |
15e6cb36 FW |
750 | { |
751 | return TRACE_TYPE_UNHANDLED; | |
752 | } | |
ea4e2bc4 | 753 | #endif /* CONFIG_FUNCTION_GRAPH_TRACER */ |
15e6cb36 | 754 | |
756d17ee | 755 | extern struct list_head ftrace_pids; |
804a6851 | 756 | |
1155de47 | 757 | #ifdef CONFIG_FUNCTION_TRACER |
804a6851 SR |
758 | static inline int ftrace_trace_task(struct task_struct *task) |
759 | { | |
756d17ee | 760 | if (list_empty(&ftrace_pids)) |
804a6851 SR |
761 | return 1; |
762 | ||
763 | return test_tsk_trace_trace(task); | |
764 | } | |
e0a413f6 | 765 | extern int ftrace_is_dead(void); |
1155de47 PM |
766 | #else |
767 | static inline int ftrace_trace_task(struct task_struct *task) | |
768 | { | |
769 | return 1; | |
770 | } | |
e0a413f6 | 771 | static inline int ftrace_is_dead(void) { return 0; } |
1155de47 | 772 | #endif |
804a6851 | 773 | |
ced39002 JO |
774 | int ftrace_event_is_function(struct ftrace_event_call *call); |
775 | ||
b63f39ea | 776 | /* |
777 | * struct trace_parser - servers for reading the user input separated by spaces | |
778 | * @cont: set if the input is not complete - no final space char was found | |
779 | * @buffer: holds the parsed user input | |
1537a363 | 780 | * @idx: user input length |
b63f39ea | 781 | * @size: buffer size |
782 | */ | |
783 | struct trace_parser { | |
784 | bool cont; | |
785 | char *buffer; | |
786 | unsigned idx; | |
787 | unsigned size; | |
788 | }; | |
789 | ||
790 | static inline bool trace_parser_loaded(struct trace_parser *parser) | |
791 | { | |
792 | return (parser->idx != 0); | |
793 | } | |
794 | ||
795 | static inline bool trace_parser_cont(struct trace_parser *parser) | |
796 | { | |
797 | return parser->cont; | |
798 | } | |
799 | ||
800 | static inline void trace_parser_clear(struct trace_parser *parser) | |
801 | { | |
802 | parser->cont = false; | |
803 | parser->idx = 0; | |
804 | } | |
805 | ||
806 | extern int trace_parser_get_init(struct trace_parser *parser, int size); | |
807 | extern void trace_parser_put(struct trace_parser *parser); | |
808 | extern int trace_get_user(struct trace_parser *parser, const char __user *ubuf, | |
809 | size_t cnt, loff_t *ppos); | |
810 | ||
4fcdae83 SR |
811 | /* |
812 | * trace_iterator_flags is an enumeration that defines bit | |
813 | * positions into trace_flags that controls the output. | |
814 | * | |
815 | * NOTE: These bits must match the trace_options array in | |
816 | * trace.c. | |
817 | */ | |
4e655519 IM |
818 | enum trace_iterator_flags { |
819 | TRACE_ITER_PRINT_PARENT = 0x01, | |
820 | TRACE_ITER_SYM_OFFSET = 0x02, | |
821 | TRACE_ITER_SYM_ADDR = 0x04, | |
822 | TRACE_ITER_VERBOSE = 0x08, | |
823 | TRACE_ITER_RAW = 0x10, | |
824 | TRACE_ITER_HEX = 0x20, | |
825 | TRACE_ITER_BIN = 0x40, | |
826 | TRACE_ITER_BLOCK = 0x80, | |
827 | TRACE_ITER_STACKTRACE = 0x100, | |
2cbafd68 LZ |
828 | TRACE_ITER_PRINTK = 0x200, |
829 | TRACE_ITER_PREEMPTONLY = 0x400, | |
830 | TRACE_ITER_BRANCH = 0x800, | |
831 | TRACE_ITER_ANNOTATE = 0x1000, | |
832 | TRACE_ITER_USERSTACKTRACE = 0x2000, | |
833 | TRACE_ITER_SYM_USEROBJ = 0x4000, | |
834 | TRACE_ITER_PRINTK_MSGONLY = 0x8000, | |
835 | TRACE_ITER_CONTEXT_INFO = 0x10000, /* Print pid/cpu/time */ | |
836 | TRACE_ITER_LATENCY_FMT = 0x20000, | |
837 | TRACE_ITER_SLEEP_TIME = 0x40000, | |
838 | TRACE_ITER_GRAPH_TIME = 0x80000, | |
e870e9a1 | 839 | TRACE_ITER_RECORD_CMD = 0x100000, |
750912fa | 840 | TRACE_ITER_OVERWRITE = 0x200000, |
cf30cf67 | 841 | TRACE_ITER_STOP_ON_FREE = 0x400000, |
77271ce4 | 842 | TRACE_ITER_IRQ_INFO = 0x800000, |
5224c3a3 | 843 | TRACE_ITER_MARKERS = 0x1000000, |
4e655519 IM |
844 | }; |
845 | ||
15e6cb36 FW |
846 | /* |
847 | * TRACE_ITER_SYM_MASK masks the options in trace_flags that | |
848 | * control the output of kernel symbols. | |
849 | */ | |
850 | #define TRACE_ITER_SYM_MASK \ | |
851 | (TRACE_ITER_PRINT_PARENT|TRACE_ITER_SYM_OFFSET|TRACE_ITER_SYM_ADDR) | |
852 | ||
43a15386 FW |
853 | extern struct tracer nop_trace; |
854 | ||
2ed84eeb | 855 | #ifdef CONFIG_BRANCH_TRACER |
9f029e83 SR |
856 | extern int enable_branch_tracing(struct trace_array *tr); |
857 | extern void disable_branch_tracing(void); | |
858 | static inline int trace_branch_enable(struct trace_array *tr) | |
52f232cb | 859 | { |
9f029e83 SR |
860 | if (trace_flags & TRACE_ITER_BRANCH) |
861 | return enable_branch_tracing(tr); | |
52f232cb SR |
862 | return 0; |
863 | } | |
9f029e83 | 864 | static inline void trace_branch_disable(void) |
52f232cb SR |
865 | { |
866 | /* due to races, always disable */ | |
9f029e83 | 867 | disable_branch_tracing(); |
52f232cb SR |
868 | } |
869 | #else | |
9f029e83 | 870 | static inline int trace_branch_enable(struct trace_array *tr) |
52f232cb SR |
871 | { |
872 | return 0; | |
873 | } | |
9f029e83 | 874 | static inline void trace_branch_disable(void) |
52f232cb SR |
875 | { |
876 | } | |
2ed84eeb | 877 | #endif /* CONFIG_BRANCH_TRACER */ |
52f232cb | 878 | |
1852fcce SR |
879 | /* set ring buffers to default size if not already done so */ |
880 | int tracing_update_buffers(void); | |
881 | ||
fd994989 SR |
882 | /* trace event type bit fields, not numeric */ |
883 | enum { | |
884 | TRACE_EVENT_TYPE_PRINTF = 1, | |
885 | TRACE_EVENT_TYPE_RAW = 2, | |
886 | }; | |
887 | ||
cf027f64 TZ |
888 | struct ftrace_event_field { |
889 | struct list_head link; | |
92edca07 SR |
890 | const char *name; |
891 | const char *type; | |
aa38e9fc | 892 | int filter_type; |
cf027f64 TZ |
893 | int offset; |
894 | int size; | |
a118e4d1 | 895 | int is_signed; |
cf027f64 TZ |
896 | }; |
897 | ||
30e673b2 | 898 | struct event_filter { |
c9c53ca0 SR |
899 | int n_preds; /* Number assigned */ |
900 | int a_preds; /* allocated */ | |
74e9e58c | 901 | struct filter_pred *preds; |
61e9dea2 | 902 | struct filter_pred *root; |
8b372562 | 903 | char *filter_string; |
30e673b2 TZ |
904 | }; |
905 | ||
cfb180f3 TZ |
906 | struct event_subsystem { |
907 | struct list_head list; | |
908 | const char *name; | |
1f9963cb | 909 | struct event_filter *filter; |
e9dbfae5 | 910 | int ref_count; |
cfb180f3 TZ |
911 | }; |
912 | ||
ae63b31e SR |
913 | struct ftrace_subsystem_dir { |
914 | struct list_head list; | |
915 | struct event_subsystem *subsystem; | |
916 | struct trace_array *tr; | |
917 | struct dentry *entry; | |
918 | int ref_count; | |
919 | int nr_events; | |
920 | }; | |
921 | ||
61e9dea2 SR |
922 | #define FILTER_PRED_INVALID ((unsigned short)-1) |
923 | #define FILTER_PRED_IS_RIGHT (1 << 15) | |
43cd4145 | 924 | #define FILTER_PRED_FOLD (1 << 15) |
61e9dea2 | 925 | |
bf93f9ed SR |
926 | /* |
927 | * The max preds is the size of unsigned short with | |
928 | * two flags at the MSBs. One bit is used for both the IS_RIGHT | |
929 | * and FOLD flags. The other is reserved. | |
930 | * | |
931 | * 2^14 preds is way more than enough. | |
932 | */ | |
933 | #define MAX_FILTER_PRED 16384 | |
4a3d27e9 | 934 | |
7ce7e424 | 935 | struct filter_pred; |
1889d209 | 936 | struct regex; |
7ce7e424 | 937 | |
58d9a597 | 938 | typedef int (*filter_pred_fn_t) (struct filter_pred *pred, void *event); |
7ce7e424 | 939 | |
1889d209 FW |
940 | typedef int (*regex_match_func)(char *str, struct regex *r, int len); |
941 | ||
3f6fe06d | 942 | enum regex_type { |
b0f1a59a | 943 | MATCH_FULL = 0, |
3f6fe06d FW |
944 | MATCH_FRONT_ONLY, |
945 | MATCH_MIDDLE_ONLY, | |
946 | MATCH_END_ONLY, | |
947 | }; | |
948 | ||
1889d209 FW |
949 | struct regex { |
950 | char pattern[MAX_FILTER_STR_VAL]; | |
951 | int len; | |
952 | int field_len; | |
953 | regex_match_func match; | |
954 | }; | |
955 | ||
7ce7e424 | 956 | struct filter_pred { |
1889d209 FW |
957 | filter_pred_fn_t fn; |
958 | u64 val; | |
959 | struct regex regex; | |
61aaef55 | 960 | unsigned short *ops; |
1d0e78e3 | 961 | struct ftrace_event_field *field; |
1889d209 FW |
962 | int offset; |
963 | int not; | |
964 | int op; | |
61e9dea2 SR |
965 | unsigned short index; |
966 | unsigned short parent; | |
967 | unsigned short left; | |
968 | unsigned short right; | |
7ce7e424 TZ |
969 | }; |
970 | ||
8728fe50 LZ |
971 | extern struct list_head ftrace_common_fields; |
972 | ||
3f6fe06d FW |
973 | extern enum regex_type |
974 | filter_parse_regex(char *buff, int len, char **search, int *not); | |
8b372562 | 975 | extern void print_event_filter(struct ftrace_event_call *call, |
4bda2d51 | 976 | struct trace_seq *s); |
8b372562 TZ |
977 | extern int apply_event_filter(struct ftrace_event_call *call, |
978 | char *filter_string); | |
ae63b31e | 979 | extern int apply_subsystem_event_filter(struct ftrace_subsystem_dir *dir, |
8b372562 TZ |
980 | char *filter_string); |
981 | extern void print_subsystem_event_filter(struct event_subsystem *system, | |
ac1adc55 | 982 | struct trace_seq *s); |
aa38e9fc | 983 | extern int filter_assign_type(const char *type); |
7ce7e424 | 984 | |
2e33af02 SR |
985 | struct list_head * |
986 | trace_get_fields(struct ftrace_event_call *event_call); | |
987 | ||
eb02ce01 | 988 | static inline int |
e1112b4d | 989 | filter_check_discard(struct ftrace_event_call *call, void *rec, |
eb02ce01 | 990 | struct ring_buffer *buffer, |
e1112b4d TZ |
991 | struct ring_buffer_event *event) |
992 | { | |
553552ce | 993 | if (unlikely(call->flags & TRACE_EVENT_FL_FILTERED) && |
6fb2915d | 994 | !filter_match_preds(call->filter, rec)) { |
eb02ce01 TZ |
995 | ring_buffer_discard_commit(buffer, event); |
996 | return 1; | |
997 | } | |
998 | ||
999 | return 0; | |
e1112b4d TZ |
1000 | } |
1001 | ||
e870e9a1 | 1002 | extern void trace_event_enable_cmd_record(bool enable); |
277ba044 | 1003 | extern int event_trace_add_tracer(struct dentry *parent, struct trace_array *tr); |
0c8916c3 | 1004 | extern int event_trace_del_tracer(struct trace_array *tr); |
e870e9a1 | 1005 | |
20c8928a | 1006 | extern struct mutex event_mutex; |
a59fd602 | 1007 | extern struct list_head ftrace_events; |
ac199db0 | 1008 | |
e9fb2b6d SR |
1009 | extern const char *__start___trace_bprintk_fmt[]; |
1010 | extern const char *__stop___trace_bprintk_fmt[]; | |
1011 | ||
07d777fe | 1012 | void trace_printk_init_buffers(void); |
81698831 | 1013 | void trace_printk_start_comm(void); |
613f04a0 | 1014 | int trace_keep_overwrite(struct tracer *tracer, u32 mask, int set); |
2b6080f2 | 1015 | int set_tracer_flag(struct trace_array *tr, unsigned int mask, int enabled); |
07d777fe | 1016 | |
4e5292ea | 1017 | #undef FTRACE_ENTRY |
02aa3162 | 1018 | #define FTRACE_ENTRY(call, struct_name, id, tstruct, print, filter) \ |
86c38a31 JM |
1019 | extern struct ftrace_event_call \ |
1020 | __attribute__((__aligned__(4))) event_##call; | |
4e5292ea | 1021 | #undef FTRACE_ENTRY_DUP |
02aa3162 JO |
1022 | #define FTRACE_ENTRY_DUP(call, struct_name, id, tstruct, print, filter) \ |
1023 | FTRACE_ENTRY(call, struct_name, id, PARAMS(tstruct), PARAMS(print), \ | |
1024 | filter) | |
4e5292ea | 1025 | #include "trace_entries.h" |
e1112b4d | 1026 | |
6e48b550 | 1027 | #if defined(CONFIG_PERF_EVENTS) && defined(CONFIG_FUNCTION_TRACER) |
ced39002 JO |
1028 | int perf_ftrace_event_register(struct ftrace_event_call *call, |
1029 | enum trace_reg type, void *data); | |
1030 | #else | |
1031 | #define perf_ftrace_event_register NULL | |
6e48b550 | 1032 | #endif |
ced39002 | 1033 | |
bc0c38d1 | 1034 | #endif /* _LINUX_KERNEL_TRACE_H */ |