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> |
6fa3eb70 S |
15 | #ifdef CONFIG_MT65XX_TRACER |
16 | #include <mach/mt_mon.h> | |
17 | #endif | |
9504504c | 18 | |
12ab74ee SR |
19 | #ifdef CONFIG_FTRACE_SYSCALLS |
20 | #include <asm/unistd.h> /* For NR_SYSCALLS */ | |
21 | #include <asm/syscall.h> /* some archs define it here */ | |
22 | #endif | |
23 | ||
72829bc3 TG |
24 | enum trace_type { |
25 | __TRACE_FIRST_TYPE = 0, | |
26 | ||
27 | TRACE_FN, | |
28 | TRACE_CTX, | |
29 | TRACE_WAKE, | |
30 | TRACE_STACK, | |
dd0e545f | 31 | TRACE_PRINT, |
48ead020 | 32 | TRACE_BPRINT, |
bd8ac686 PP |
33 | TRACE_MMIO_RW, |
34 | TRACE_MMIO_MAP, | |
9f029e83 | 35 | TRACE_BRANCH, |
287b6e68 FW |
36 | TRACE_GRAPH_RET, |
37 | TRACE_GRAPH_ENT, | |
02b67518 | 38 | TRACE_USER_STACK, |
c71a8961 | 39 | TRACE_BLK, |
09ae7234 | 40 | TRACE_BPUTS, |
6fa3eb70 | 41 | TRACE_MT65XX_MON_TYPE, |
72829bc3 | 42 | |
f0868d1e | 43 | __TRACE_LAST_TYPE, |
72829bc3 TG |
44 | }; |
45 | ||
bc0c38d1 | 46 | |
0a1c49db SR |
47 | #undef __field |
48 | #define __field(type, item) type item; | |
86387f7e | 49 | |
d7315094 SR |
50 | #undef __field_struct |
51 | #define __field_struct(type, item) __field(type, item) | |
86387f7e | 52 | |
d7315094 SR |
53 | #undef __field_desc |
54 | #define __field_desc(type, container, item) | |
02b67518 | 55 | |
0a1c49db SR |
56 | #undef __array |
57 | #define __array(type, item, size) type item[size]; | |
1427cdf0 | 58 | |
d7315094 SR |
59 | #undef __array_desc |
60 | #define __array_desc(type, container, item, size) | |
777e208d | 61 | |
0a1c49db SR |
62 | #undef __dynamic_array |
63 | #define __dynamic_array(type, item) type item[]; | |
777e208d | 64 | |
0a1c49db SR |
65 | #undef F_STRUCT |
66 | #define F_STRUCT(args...) args | |
74239072 | 67 | |
0a1c49db | 68 | #undef FTRACE_ENTRY |
02aa3162 JO |
69 | #define FTRACE_ENTRY(name, struct_name, id, tstruct, print, filter) \ |
70 | struct struct_name { \ | |
71 | struct trace_entry ent; \ | |
72 | tstruct \ | |
0a1c49db | 73 | } |
777e208d | 74 | |
0a1c49db SR |
75 | #undef TP_ARGS |
76 | #define TP_ARGS(args...) args | |
52f232cb | 77 | |
0a1c49db | 78 | #undef FTRACE_ENTRY_DUP |
02aa3162 | 79 | #define FTRACE_ENTRY_DUP(name, name_struct, id, tstruct, printk, filter) |
1e9b51c2 | 80 | |
e59a0bff | 81 | #undef FTRACE_ENTRY_REG |
02aa3162 JO |
82 | #define FTRACE_ENTRY_REG(name, struct_name, id, tstruct, print, \ |
83 | filter, regfn) \ | |
84 | FTRACE_ENTRY(name, struct_name, id, PARAMS(tstruct), PARAMS(print), \ | |
85 | filter) | |
e59a0bff | 86 | |
0a1c49db | 87 | #include "trace_entries.h" |
36994e58 | 88 | |
0a1c49db SR |
89 | /* |
90 | * syscalls are special, and need special handling, this is why | |
91 | * they are not included in trace_entries.h | |
92 | */ | |
bed1ffca FW |
93 | struct syscall_trace_enter { |
94 | struct trace_entry ent; | |
95 | int nr; | |
96 | unsigned long args[]; | |
97 | }; | |
98 | ||
99 | struct syscall_trace_exit { | |
100 | struct trace_entry ent; | |
101 | int nr; | |
99df5a6a | 102 | long ret; |
bed1ffca FW |
103 | }; |
104 | ||
93ccae7a | 105 | struct kprobe_trace_entry_head { |
413d37d1 MH |
106 | struct trace_entry ent; |
107 | unsigned long ip; | |
413d37d1 MH |
108 | }; |
109 | ||
93ccae7a | 110 | struct kretprobe_trace_entry_head { |
413d37d1 MH |
111 | struct trace_entry ent; |
112 | unsigned long func; | |
113 | unsigned long ret_ip; | |
413d37d1 MH |
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 | ||
12883efb SRRH |
170 | struct trace_buffer { |
171 | struct trace_array *tr; | |
172 | struct ring_buffer *buffer; | |
173 | struct trace_array_cpu __percpu *data; | |
174 | cycle_t time_start; | |
175 | int cpu; | |
176 | }; | |
177 | ||
bc0c38d1 SR |
178 | /* |
179 | * The trace array - an array of per-CPU trace arrays. This is the | |
180 | * highest level data structure that individual tracers deal with. | |
181 | * They have on/off state as well: | |
182 | */ | |
183 | struct trace_array { | |
ae63b31e | 184 | struct list_head list; |
277ba044 | 185 | char *name; |
12883efb SRRH |
186 | struct trace_buffer trace_buffer; |
187 | #ifdef CONFIG_TRACER_MAX_TRACE | |
188 | /* | |
189 | * The max_buffer is used to snapshot the trace when a maximum | |
190 | * latency is reached, or when the user initiates a snapshot. | |
191 | * Some tracers will use this to store a maximum trace while | |
192 | * it continues examining live traces. | |
193 | * | |
194 | * The buffers for the max_buffer are set up the same as the trace_buffer | |
195 | * When a snapshot is taken, the buffer of the max_buffer is swapped | |
196 | * with the buffer of the trace_buffer and the buffers are reset for | |
197 | * the trace_buffer so the tracing can continue. | |
198 | */ | |
199 | struct trace_buffer max_buffer; | |
45ad21ca | 200 | bool allocated_snapshot; |
12883efb | 201 | #endif |
499e5470 | 202 | int buffer_disabled; |
2b6080f2 | 203 | struct trace_cpu trace_cpu; /* place holder */ |
12ab74ee SR |
204 | #ifdef CONFIG_FTRACE_SYSCALLS |
205 | int sys_refcount_enter; | |
206 | int sys_refcount_exit; | |
207 | DECLARE_BITMAP(enabled_enter_syscalls, NR_syscalls); | |
208 | DECLARE_BITMAP(enabled_exit_syscalls, NR_syscalls); | |
209 | #endif | |
2b6080f2 SR |
210 | int stop_count; |
211 | int clock_id; | |
212 | struct tracer *current_trace; | |
ae63b31e | 213 | unsigned int flags; |
2b6080f2 | 214 | raw_spinlock_t start_lock; |
ae63b31e | 215 | struct dentry *dir; |
2b6080f2 SR |
216 | struct dentry *options; |
217 | struct dentry *percpu_dir; | |
ae63b31e SR |
218 | struct dentry *event_dir; |
219 | struct list_head systems; | |
220 | struct list_head events; | |
b3806b43 | 221 | struct task_struct *waiter; |
a695cb58 | 222 | int ref; |
bc0c38d1 SR |
223 | }; |
224 | ||
ae63b31e SR |
225 | enum { |
226 | TRACE_ARRAY_FL_GLOBAL = (1 << 0) | |
227 | }; | |
228 | ||
229 | extern struct list_head ftrace_trace_arrays; | |
230 | ||
9713f785 AL |
231 | extern struct mutex trace_types_lock; |
232 | ||
fc82a11a SRRH |
233 | extern int trace_array_get(struct trace_array *tr); |
234 | extern void trace_array_put(struct trace_array *tr); | |
235 | ||
ae63b31e SR |
236 | /* |
237 | * The global tracer (top) should be the first trace array added, | |
238 | * but we check the flag anyway. | |
239 | */ | |
240 | static inline struct trace_array *top_trace_array(void) | |
241 | { | |
242 | struct trace_array *tr; | |
243 | ||
244 | tr = list_entry(ftrace_trace_arrays.prev, | |
245 | typeof(*tr), list); | |
246 | WARN_ON(!(tr->flags & TRACE_ARRAY_FL_GLOBAL)); | |
247 | return tr; | |
248 | } | |
249 | ||
7104f300 SR |
250 | #define FTRACE_CMP_TYPE(var, type) \ |
251 | __builtin_types_compatible_p(typeof(var), type *) | |
252 | ||
253 | #undef IF_ASSIGN | |
254 | #define IF_ASSIGN(var, entry, etype, id) \ | |
255 | if (FTRACE_CMP_TYPE(var, etype)) { \ | |
256 | var = (typeof(var))(entry); \ | |
257 | WARN_ON(id && (entry)->type != id); \ | |
258 | break; \ | |
259 | } | |
260 | ||
261 | /* Will cause compile errors if type is not found. */ | |
262 | extern void __ftrace_bad_type(void); | |
263 | ||
264 | /* | |
265 | * The trace_assign_type is a verifier that the entry type is | |
266 | * the same as the type being assigned. To add new types simply | |
267 | * add a line with the following format: | |
268 | * | |
269 | * IF_ASSIGN(var, ent, type, id); | |
270 | * | |
271 | * Where "type" is the trace type that includes the trace_entry | |
272 | * as the "ent" item. And "id" is the trace identifier that is | |
273 | * used in the trace_type enum. | |
274 | * | |
275 | * If the type can have more than one id, then use zero. | |
276 | */ | |
277 | #define trace_assign_type(var, ent) \ | |
278 | do { \ | |
279 | IF_ASSIGN(var, ent, struct ftrace_entry, TRACE_FN); \ | |
280 | IF_ASSIGN(var, ent, struct ctx_switch_entry, 0); \ | |
7104f300 | 281 | IF_ASSIGN(var, ent, struct stack_entry, TRACE_STACK); \ |
02b67518 | 282 | IF_ASSIGN(var, ent, struct userstack_entry, TRACE_USER_STACK);\ |
7104f300 | 283 | IF_ASSIGN(var, ent, struct print_entry, TRACE_PRINT); \ |
48ead020 | 284 | IF_ASSIGN(var, ent, struct bprint_entry, TRACE_BPRINT); \ |
09ae7234 | 285 | IF_ASSIGN(var, ent, struct bputs_entry, TRACE_BPUTS); \ |
7104f300 SR |
286 | IF_ASSIGN(var, ent, struct trace_mmiotrace_rw, \ |
287 | TRACE_MMIO_RW); \ | |
288 | IF_ASSIGN(var, ent, struct trace_mmiotrace_map, \ | |
289 | TRACE_MMIO_MAP); \ | |
9f029e83 | 290 | IF_ASSIGN(var, ent, struct trace_branch, TRACE_BRANCH); \ |
287b6e68 FW |
291 | IF_ASSIGN(var, ent, struct ftrace_graph_ent_entry, \ |
292 | TRACE_GRAPH_ENT); \ | |
293 | IF_ASSIGN(var, ent, struct ftrace_graph_ret_entry, \ | |
294 | TRACE_GRAPH_RET); \ | |
6fa3eb70 S |
295 | IF_ASSIGN(var, ent, struct mt65xx_mon_entry, \ |
296 | TRACE_MT65XX_MON_TYPE); \ | |
7104f300 SR |
297 | __ftrace_bad_type(); \ |
298 | } while (0) | |
2c4f035f | 299 | |
adf9f195 FW |
300 | /* |
301 | * An option specific to a tracer. This is a boolean value. | |
302 | * The bit is the bit index that sets its value on the | |
303 | * flags value in struct tracer_flags. | |
304 | */ | |
305 | struct tracer_opt { | |
9de36825 IM |
306 | const char *name; /* Will appear on the trace_options file */ |
307 | u32 bit; /* Mask assigned in val field in tracer_flags */ | |
adf9f195 FW |
308 | }; |
309 | ||
310 | /* | |
311 | * The set of specific options for a tracer. Your tracer | |
312 | * have to set the initial value of the flags val. | |
313 | */ | |
314 | struct tracer_flags { | |
315 | u32 val; | |
9de36825 | 316 | struct tracer_opt *opts; |
adf9f195 FW |
317 | }; |
318 | ||
319 | /* Makes more easy to define a tracer opt */ | |
320 | #define TRACER_OPT(s, b) .name = #s, .bit = b | |
321 | ||
034939b6 | 322 | |
6eaaa5d5 FW |
323 | /** |
324 | * struct tracer - a specific tracer and its callbacks to interact with debugfs | |
325 | * @name: the name chosen to select it on the available_tracers file | |
326 | * @init: called when one switches to this tracer (echo name > current_tracer) | |
327 | * @reset: called when one switches to another tracer | |
328 | * @start: called when tracing is unpaused (echo 1 > tracing_enabled) | |
329 | * @stop: called when tracing is paused (echo 0 > tracing_enabled) | |
330 | * @open: called when the trace file is opened | |
331 | * @pipe_open: called when the trace_pipe file is opened | |
332 | * @wait_pipe: override how the user waits for traces on trace_pipe | |
333 | * @close: called when the trace file is released | |
c521efd1 | 334 | * @pipe_close: called when the trace_pipe file is released |
6eaaa5d5 FW |
335 | * @read: override the default read callback on trace_pipe |
336 | * @splice_read: override the default splice_read callback on trace_pipe | |
337 | * @selftest: selftest to run on boot (see trace_selftest.c) | |
338 | * @print_headers: override the first lines that describe your columns | |
339 | * @print_line: callback that prints a trace | |
340 | * @set_flag: signals one of your private flags changed (trace_options file) | |
341 | * @flags: your private flags | |
bc0c38d1 SR |
342 | */ |
343 | struct tracer { | |
344 | const char *name; | |
1c80025a | 345 | int (*init)(struct trace_array *tr); |
bc0c38d1 | 346 | void (*reset)(struct trace_array *tr); |
9036990d SR |
347 | void (*start)(struct trace_array *tr); |
348 | void (*stop)(struct trace_array *tr); | |
bc0c38d1 | 349 | void (*open)(struct trace_iterator *iter); |
107bad8b | 350 | void (*pipe_open)(struct trace_iterator *iter); |
561237e4 | 351 | int (*wait_pipe)(struct trace_iterator *iter); |
bc0c38d1 | 352 | void (*close)(struct trace_iterator *iter); |
c521efd1 | 353 | void (*pipe_close)(struct trace_iterator *iter); |
107bad8b SR |
354 | ssize_t (*read)(struct trace_iterator *iter, |
355 | struct file *filp, char __user *ubuf, | |
356 | size_t cnt, loff_t *ppos); | |
3c56819b EGM |
357 | ssize_t (*splice_read)(struct trace_iterator *iter, |
358 | struct file *filp, | |
359 | loff_t *ppos, | |
360 | struct pipe_inode_info *pipe, | |
361 | size_t len, | |
362 | unsigned int flags); | |
60a11774 SR |
363 | #ifdef CONFIG_FTRACE_STARTUP_TEST |
364 | int (*selftest)(struct tracer *trace, | |
365 | struct trace_array *tr); | |
366 | #endif | |
8bba1bf5 | 367 | void (*print_header)(struct seq_file *m); |
2c4f035f | 368 | enum print_line_t (*print_line)(struct trace_iterator *iter); |
adf9f195 FW |
369 | /* If you handled the flag setting, return 0 */ |
370 | int (*set_flag)(u32 old_flags, u32 bit, int set); | |
613f04a0 SRRH |
371 | /* Return 0 if OK with change, else return non-zero */ |
372 | int (*flag_changed)(struct tracer *tracer, | |
373 | u32 mask, int set); | |
bc0c38d1 | 374 | struct tracer *next; |
9de36825 | 375 | struct tracer_flags *flags; |
f43c738b | 376 | bool print_max; |
12883efb SRRH |
377 | bool enabled; |
378 | #ifdef CONFIG_TRACER_MAX_TRACE | |
f43c738b | 379 | bool use_max_tr; |
12883efb | 380 | #endif |
bc0c38d1 SR |
381 | }; |
382 | ||
f9520750 | 383 | |
e4a3f541 | 384 | /* Only current can touch trace_recursion */ |
e4a3f541 | 385 | |
edc15caf SR |
386 | /* |
387 | * For function tracing recursion: | |
388 | * The order of these bits are important. | |
389 | * | |
390 | * When function tracing occurs, the following steps are made: | |
391 | * If arch does not support a ftrace feature: | |
392 | * call internal function (uses INTERNAL bits) which calls... | |
393 | * If callback is registered to the "global" list, the list | |
394 | * function is called and recursion checks the GLOBAL bits. | |
395 | * then this function calls... | |
396 | * The function callback, which can use the FTRACE bits to | |
397 | * check for recursion. | |
398 | * | |
399 | * Now if the arch does not suppport a feature, and it calls | |
400 | * the global list function which calls the ftrace callback | |
401 | * all three of these steps will do a recursion protection. | |
402 | * There's no reason to do one if the previous caller already | |
403 | * did. The recursion that we are protecting against will | |
404 | * go through the same steps again. | |
405 | * | |
406 | * To prevent the multiple recursion checks, if a recursion | |
407 | * bit is set that is higher than the MAX bit of the current | |
408 | * check, then we know that the check was made by the previous | |
409 | * caller, and we can skip the current check. | |
410 | */ | |
e46cbf75 | 411 | enum { |
567cd4da SR |
412 | TRACE_BUFFER_BIT, |
413 | TRACE_BUFFER_NMI_BIT, | |
414 | TRACE_BUFFER_IRQ_BIT, | |
415 | TRACE_BUFFER_SIRQ_BIT, | |
416 | ||
417 | /* Start of function recursion bits */ | |
418 | TRACE_FTRACE_BIT, | |
edc15caf SR |
419 | TRACE_FTRACE_NMI_BIT, |
420 | TRACE_FTRACE_IRQ_BIT, | |
421 | TRACE_FTRACE_SIRQ_BIT, | |
e46cbf75 | 422 | |
edc15caf | 423 | /* GLOBAL_BITs must be greater than FTRACE_BITs */ |
e46cbf75 SR |
424 | TRACE_GLOBAL_BIT, |
425 | TRACE_GLOBAL_NMI_BIT, | |
426 | TRACE_GLOBAL_IRQ_BIT, | |
427 | TRACE_GLOBAL_SIRQ_BIT, | |
428 | ||
edc15caf SR |
429 | /* INTERNAL_BITs must be greater than GLOBAL_BITs */ |
430 | TRACE_INTERNAL_BIT, | |
431 | TRACE_INTERNAL_NMI_BIT, | |
432 | TRACE_INTERNAL_IRQ_BIT, | |
433 | TRACE_INTERNAL_SIRQ_BIT, | |
434 | ||
e46cbf75 | 435 | TRACE_CONTROL_BIT, |
e248491a | 436 | |
e4a3f541 SR |
437 | /* |
438 | * Abuse of the trace_recursion. | |
439 | * As we need a way to maintain state if we are tracing the function | |
440 | * graph in irq because we want to trace a particular function that | |
441 | * was called in irq context but we have irq tracing off. Since this | |
442 | * can only be modified by current, we can reuse trace_recursion. | |
443 | */ | |
e46cbf75 SR |
444 | TRACE_IRQ_BIT, |
445 | }; | |
e4a3f541 | 446 | |
e46cbf75 SR |
447 | #define trace_recursion_set(bit) do { (current)->trace_recursion |= (1<<(bit)); } while (0) |
448 | #define trace_recursion_clear(bit) do { (current)->trace_recursion &= ~(1<<(bit)); } while (0) | |
449 | #define trace_recursion_test(bit) ((current)->trace_recursion & (1<<(bit))) | |
e4a3f541 | 450 | |
edc15caf SR |
451 | #define TRACE_CONTEXT_BITS 4 |
452 | ||
453 | #define TRACE_FTRACE_START TRACE_FTRACE_BIT | |
454 | #define TRACE_FTRACE_MAX ((1 << (TRACE_FTRACE_START + TRACE_CONTEXT_BITS)) - 1) | |
455 | ||
456 | #define TRACE_GLOBAL_START TRACE_GLOBAL_BIT | |
457 | #define TRACE_GLOBAL_MAX ((1 << (TRACE_GLOBAL_START + TRACE_CONTEXT_BITS)) - 1) | |
458 | ||
459 | #define TRACE_LIST_START TRACE_INTERNAL_BIT | |
460 | #define TRACE_LIST_MAX ((1 << (TRACE_LIST_START + TRACE_CONTEXT_BITS)) - 1) | |
461 | ||
462 | #define TRACE_CONTEXT_MASK TRACE_LIST_MAX | |
463 | ||
464 | static __always_inline int trace_get_context_bit(void) | |
465 | { | |
466 | int bit; | |
467 | ||
468 | if (in_interrupt()) { | |
469 | if (in_nmi()) | |
470 | bit = 0; | |
471 | ||
472 | else if (in_irq()) | |
473 | bit = 1; | |
474 | else | |
475 | bit = 2; | |
476 | } else | |
477 | bit = 3; | |
478 | ||
479 | return bit; | |
480 | } | |
481 | ||
482 | static __always_inline int trace_test_and_set_recursion(int start, int max) | |
483 | { | |
484 | unsigned int val = current->trace_recursion; | |
485 | int bit; | |
486 | ||
487 | /* A previous recursion check was made */ | |
488 | if ((val & TRACE_CONTEXT_MASK) > max) | |
489 | return 0; | |
490 | ||
491 | bit = trace_get_context_bit() + start; | |
492 | if (unlikely(val & (1 << bit))) | |
493 | return -1; | |
494 | ||
495 | val |= 1 << bit; | |
496 | current->trace_recursion = val; | |
497 | barrier(); | |
498 | ||
499 | return bit; | |
500 | } | |
501 | ||
502 | static __always_inline void trace_clear_recursion(int bit) | |
503 | { | |
504 | unsigned int val = current->trace_recursion; | |
505 | ||
506 | if (!bit) | |
507 | return; | |
508 | ||
509 | bit = 1 << bit; | |
510 | val &= ~bit; | |
511 | ||
512 | barrier(); | |
513 | current->trace_recursion = val; | |
514 | } | |
515 | ||
6d158a81 SR |
516 | static inline struct ring_buffer_iter * |
517 | trace_buffer_iter(struct trace_iterator *iter, int cpu) | |
518 | { | |
519 | if (iter->buffer_iter && iter->buffer_iter[cpu]) | |
520 | return iter->buffer_iter[cpu]; | |
521 | return NULL; | |
522 | } | |
523 | ||
b6f11df2 | 524 | int tracer_init(struct tracer *t, struct trace_array *tr); |
9036990d | 525 | int tracing_is_enabled(void); |
12883efb SRRH |
526 | void tracing_reset(struct trace_buffer *buf, int cpu); |
527 | void tracing_reset_online_cpus(struct trace_buffer *buf); | |
9456f0fa | 528 | void tracing_reset_current(int cpu); |
873c642f | 529 | void tracing_reset_all_online_cpus(void); |
bc0c38d1 | 530 | int tracing_open_generic(struct inode *inode, struct file *filp); |
5452af66 | 531 | struct dentry *trace_create_file(const char *name, |
f4ae40a6 | 532 | umode_t mode, |
5452af66 FW |
533 | struct dentry *parent, |
534 | void *data, | |
535 | const struct file_operations *fops); | |
536 | ||
2b6080f2 | 537 | struct dentry *tracing_init_dentry_tr(struct trace_array *tr); |
bc0c38d1 | 538 | struct dentry *tracing_init_dentry(void); |
d618b3e6 | 539 | |
51a763dd ACM |
540 | struct ring_buffer_event; |
541 | ||
e77405ad SR |
542 | struct ring_buffer_event * |
543 | trace_buffer_lock_reserve(struct ring_buffer *buffer, | |
544 | int type, | |
545 | unsigned long len, | |
546 | unsigned long flags, | |
547 | int pc); | |
51a763dd | 548 | |
45dcd8b8 PP |
549 | struct trace_entry *tracing_get_trace_entry(struct trace_array *tr, |
550 | struct trace_array_cpu *data); | |
c4a8e8be FW |
551 | |
552 | struct trace_entry *trace_find_next_entry(struct trace_iterator *iter, | |
553 | int *ent_cpu, u64 *ent_ts); | |
554 | ||
7ffbd48d SR |
555 | void __buffer_unlock_commit(struct ring_buffer *buffer, |
556 | struct ring_buffer_event *event); | |
557 | ||
955b61e5 JW |
558 | int trace_empty(struct trace_iterator *iter); |
559 | ||
560 | void *trace_find_next_entry_inc(struct trace_iterator *iter); | |
561 | ||
562 | void trace_init_global_iter(struct trace_iterator *iter); | |
563 | ||
564 | void tracing_iter_reset(struct trace_iterator *iter, int cpu); | |
565 | ||
561237e4 | 566 | int poll_wait_pipe(struct trace_iterator *iter); |
6eaaa5d5 | 567 | |
bc0c38d1 SR |
568 | void ftrace(struct trace_array *tr, |
569 | struct trace_array_cpu *data, | |
570 | unsigned long ip, | |
571 | unsigned long parent_ip, | |
38697053 | 572 | unsigned long flags, int pc); |
bc0c38d1 | 573 | void tracing_sched_switch_trace(struct trace_array *tr, |
bc0c38d1 SR |
574 | struct task_struct *prev, |
575 | struct task_struct *next, | |
38697053 | 576 | unsigned long flags, int pc); |
57422797 IM |
577 | |
578 | void tracing_sched_wakeup_trace(struct trace_array *tr, | |
57422797 IM |
579 | struct task_struct *wakee, |
580 | struct task_struct *cur, | |
38697053 | 581 | unsigned long flags, int pc); |
6fb44b71 | 582 | void trace_function(struct trace_array *tr, |
6fb44b71 SR |
583 | unsigned long ip, |
584 | unsigned long parent_ip, | |
38697053 | 585 | unsigned long flags, int pc); |
0a772620 JO |
586 | void trace_graph_function(struct trace_array *tr, |
587 | unsigned long ip, | |
588 | unsigned long parent_ip, | |
589 | unsigned long flags, int pc); | |
7e9a49ef | 590 | void trace_latency_header(struct seq_file *m); |
62b915f1 JO |
591 | void trace_default_header(struct seq_file *m); |
592 | void print_trace_header(struct seq_file *m, struct trace_iterator *iter); | |
593 | int trace_empty(struct trace_iterator *iter); | |
bc0c38d1 | 594 | |
287b6e68 | 595 | void trace_graph_return(struct ftrace_graph_ret *trace); |
e49dc19c | 596 | int trace_graph_entry(struct ftrace_graph_ent *trace); |
1a0799a8 | 597 | void set_graph_array(struct trace_array *tr); |
1e9b51c2 | 598 | |
41bc8144 SR |
599 | void tracing_start_cmdline_record(void); |
600 | void tracing_stop_cmdline_record(void); | |
e168e051 SR |
601 | void tracing_sched_switch_assign_trace(struct trace_array *tr); |
602 | void tracing_stop_sched_switch_record(void); | |
603 | void tracing_start_sched_switch_record(void); | |
bc0c38d1 | 604 | int register_tracer(struct tracer *type); |
b5130b1e | 605 | int is_tracing_stopped(void); |
955b61e5 JW |
606 | |
607 | extern cpumask_var_t __read_mostly tracing_buffer_mask; | |
608 | ||
609 | #define for_each_tracing_cpu(cpu) \ | |
610 | for_each_cpu(cpu, tracing_buffer_mask) | |
bc0c38d1 SR |
611 | |
612 | extern unsigned long nsecs_to_usecs(unsigned long nsecs); | |
613 | ||
0e950173 TB |
614 | extern unsigned long tracing_thresh; |
615 | ||
5d4a9dba | 616 | #ifdef CONFIG_TRACER_MAX_TRACE |
bc0c38d1 | 617 | extern unsigned long tracing_max_latency; |
bc0c38d1 SR |
618 | |
619 | void update_max_tr(struct trace_array *tr, struct task_struct *tsk, int cpu); | |
620 | void update_max_tr_single(struct trace_array *tr, | |
621 | struct task_struct *tsk, int cpu); | |
5d4a9dba | 622 | #endif /* CONFIG_TRACER_MAX_TRACE */ |
bc0c38d1 | 623 | |
c0a0d0d3 | 624 | #ifdef CONFIG_STACKTRACE |
e77405ad | 625 | void ftrace_trace_stack(struct ring_buffer *buffer, unsigned long flags, |
c0a0d0d3 FW |
626 | int skip, int pc); |
627 | ||
1fd8df2c MH |
628 | void ftrace_trace_stack_regs(struct ring_buffer *buffer, unsigned long flags, |
629 | int skip, int pc, struct pt_regs *regs); | |
630 | ||
e77405ad | 631 | void ftrace_trace_userstack(struct ring_buffer *buffer, unsigned long flags, |
c0a0d0d3 FW |
632 | int pc); |
633 | ||
634 | void __trace_stack(struct trace_array *tr, unsigned long flags, int skip, | |
635 | int pc); | |
636 | #else | |
e1f7992e | 637 | static inline void ftrace_trace_stack(struct ring_buffer *buffer, |
c0a0d0d3 FW |
638 | unsigned long flags, int skip, int pc) |
639 | { | |
640 | } | |
641 | ||
1fd8df2c MH |
642 | static inline void ftrace_trace_stack_regs(struct ring_buffer *buffer, |
643 | unsigned long flags, int skip, | |
644 | int pc, struct pt_regs *regs) | |
645 | { | |
646 | } | |
647 | ||
e1f7992e | 648 | static inline void ftrace_trace_userstack(struct ring_buffer *buffer, |
c0a0d0d3 FW |
649 | unsigned long flags, int pc) |
650 | { | |
651 | } | |
652 | ||
653 | static inline void __trace_stack(struct trace_array *tr, unsigned long flags, | |
654 | int skip, int pc) | |
655 | { | |
656 | } | |
657 | #endif /* CONFIG_STACKTRACE */ | |
53614991 | 658 | |
e309b41d | 659 | extern cycle_t ftrace_now(int cpu); |
bc0c38d1 | 660 | |
4ca53085 | 661 | extern void trace_find_cmdline(int pid, char comm[]); |
6fa3eb70 | 662 | extern int trace_find_tgid(int pid); |
f7d48cbd | 663 | |
bc0c38d1 SR |
664 | #ifdef CONFIG_DYNAMIC_FTRACE |
665 | extern unsigned long ftrace_update_tot_cnt; | |
ad97772a | 666 | #endif |
d05cdb25 SR |
667 | #define DYN_FTRACE_TEST_NAME trace_selftest_dynamic_test_func |
668 | extern int DYN_FTRACE_TEST_NAME(void); | |
95950c2e SR |
669 | #define DYN_FTRACE_TEST_NAME2 trace_selftest_dynamic_test_func2 |
670 | extern int DYN_FTRACE_TEST_NAME2(void); | |
bc0c38d1 | 671 | |
55034cd6 | 672 | extern bool ring_buffer_expanded; |
020e5f85 | 673 | extern bool tracing_selftest_disabled; |
9288f99a | 674 | DECLARE_PER_CPU(int, ftrace_cpu_disabled); |
020e5f85 | 675 | |
60a11774 | 676 | #ifdef CONFIG_FTRACE_STARTUP_TEST |
60a11774 SR |
677 | extern int trace_selftest_startup_function(struct tracer *trace, |
678 | struct trace_array *tr); | |
7447dce9 FW |
679 | extern int trace_selftest_startup_function_graph(struct tracer *trace, |
680 | struct trace_array *tr); | |
60a11774 SR |
681 | extern int trace_selftest_startup_irqsoff(struct tracer *trace, |
682 | struct trace_array *tr); | |
60a11774 SR |
683 | extern int trace_selftest_startup_preemptoff(struct tracer *trace, |
684 | struct trace_array *tr); | |
60a11774 SR |
685 | extern int trace_selftest_startup_preemptirqsoff(struct tracer *trace, |
686 | struct trace_array *tr); | |
60a11774 SR |
687 | extern int trace_selftest_startup_wakeup(struct tracer *trace, |
688 | struct trace_array *tr); | |
fb1b6d8b SN |
689 | extern int trace_selftest_startup_nop(struct tracer *trace, |
690 | struct trace_array *tr); | |
60a11774 SR |
691 | extern int trace_selftest_startup_sched_switch(struct tracer *trace, |
692 | struct trace_array *tr); | |
80e5ea45 SR |
693 | extern int trace_selftest_startup_branch(struct tracer *trace, |
694 | struct trace_array *tr); | |
60a11774 SR |
695 | #endif /* CONFIG_FTRACE_STARTUP_TEST */ |
696 | ||
c7aafc54 | 697 | extern void *head_page(struct trace_array_cpu *data); |
cf8e3474 | 698 | extern unsigned long long ns2usecs(cycle_t nsec); |
1fd8f2a3 | 699 | extern int |
40ce74f1 | 700 | trace_vbprintk(unsigned long ip, const char *fmt, va_list args); |
48ead020 | 701 | extern int |
40ce74f1 | 702 | trace_vprintk(unsigned long ip, const char *fmt, va_list args); |
659372d3 SR |
703 | extern int |
704 | trace_array_vprintk(struct trace_array *tr, | |
705 | unsigned long ip, const char *fmt, va_list args); | |
706 | int trace_array_printk(struct trace_array *tr, | |
707 | unsigned long ip, const char *fmt, ...); | |
12883efb SRRH |
708 | int trace_array_printk_buf(struct ring_buffer *buffer, |
709 | unsigned long ip, const char *fmt, ...); | |
955b61e5 JW |
710 | void trace_printk_seq(struct trace_seq *s); |
711 | enum print_line_t print_trace_line(struct trace_iterator *iter); | |
c7aafc54 | 712 | |
4e655519 IM |
713 | extern unsigned long trace_flags; |
714 | ||
15e6cb36 | 715 | /* Standard output formatting function used for function return traces */ |
fb52607a | 716 | #ifdef CONFIG_FUNCTION_GRAPH_TRACER |
62b915f1 JO |
717 | |
718 | /* Flag options */ | |
719 | #define TRACE_GRAPH_PRINT_OVERRUN 0x1 | |
720 | #define TRACE_GRAPH_PRINT_CPU 0x2 | |
721 | #define TRACE_GRAPH_PRINT_OVERHEAD 0x4 | |
722 | #define TRACE_GRAPH_PRINT_PROC 0x8 | |
723 | #define TRACE_GRAPH_PRINT_DURATION 0x10 | |
724 | #define TRACE_GRAPH_PRINT_ABS_TIME 0x20 | |
725 | ||
d7a8d9e9 JO |
726 | extern enum print_line_t |
727 | print_graph_function_flags(struct trace_iterator *iter, u32 flags); | |
728 | extern void print_graph_headers_flags(struct seq_file *s, u32 flags); | |
0706f1c4 SR |
729 | extern enum print_line_t |
730 | trace_print_graph_duration(unsigned long long duration, struct trace_seq *s); | |
62b915f1 JO |
731 | extern void graph_trace_open(struct trace_iterator *iter); |
732 | extern void graph_trace_close(struct trace_iterator *iter); | |
733 | extern int __trace_graph_entry(struct trace_array *tr, | |
734 | struct ftrace_graph_ent *trace, | |
735 | unsigned long flags, int pc); | |
736 | extern void __trace_graph_return(struct trace_array *tr, | |
737 | struct ftrace_graph_ret *trace, | |
738 | unsigned long flags, int pc); | |
739 | ||
ea4e2bc4 SR |
740 | |
741 | #ifdef CONFIG_DYNAMIC_FTRACE | |
742 | /* TODO: make this variable */ | |
743 | #define FTRACE_GRAPH_MAX_FUNCS 32 | |
c7c6b1fe | 744 | extern int ftrace_graph_filter_enabled; |
ea4e2bc4 SR |
745 | extern int ftrace_graph_count; |
746 | extern unsigned long ftrace_graph_funcs[FTRACE_GRAPH_MAX_FUNCS]; | |
747 | ||
748 | static inline int ftrace_graph_addr(unsigned long addr) | |
749 | { | |
750 | int i; | |
751 | ||
c7c6b1fe | 752 | if (!ftrace_graph_filter_enabled) |
ea4e2bc4 SR |
753 | return 1; |
754 | ||
755 | for (i = 0; i < ftrace_graph_count; i++) { | |
e4a3f541 SR |
756 | if (addr == ftrace_graph_funcs[i]) { |
757 | /* | |
758 | * If no irqs are to be traced, but a set_graph_function | |
759 | * is set, and called by an interrupt handler, we still | |
760 | * want to trace it. | |
761 | */ | |
762 | if (in_irq()) | |
763 | trace_recursion_set(TRACE_IRQ_BIT); | |
764 | else | |
765 | trace_recursion_clear(TRACE_IRQ_BIT); | |
ea4e2bc4 | 766 | return 1; |
e4a3f541 | 767 | } |
ea4e2bc4 SR |
768 | } |
769 | ||
770 | return 0; | |
771 | } | |
15e6cb36 | 772 | #else |
6b253930 IM |
773 | static inline int ftrace_graph_addr(unsigned long addr) |
774 | { | |
775 | return 1; | |
ea4e2bc4 SR |
776 | } |
777 | #endif /* CONFIG_DYNAMIC_FTRACE */ | |
ea4e2bc4 | 778 | #else /* CONFIG_FUNCTION_GRAPH_TRACER */ |
15e6cb36 | 779 | static inline enum print_line_t |
d7a8d9e9 | 780 | print_graph_function_flags(struct trace_iterator *iter, u32 flags) |
15e6cb36 FW |
781 | { |
782 | return TRACE_TYPE_UNHANDLED; | |
783 | } | |
ea4e2bc4 | 784 | #endif /* CONFIG_FUNCTION_GRAPH_TRACER */ |
15e6cb36 | 785 | |
756d17ee | 786 | extern struct list_head ftrace_pids; |
804a6851 | 787 | |
1155de47 | 788 | #ifdef CONFIG_FUNCTION_TRACER |
804a6851 SR |
789 | static inline int ftrace_trace_task(struct task_struct *task) |
790 | { | |
756d17ee | 791 | if (list_empty(&ftrace_pids)) |
804a6851 SR |
792 | return 1; |
793 | ||
794 | return test_tsk_trace_trace(task); | |
795 | } | |
e0a413f6 | 796 | extern int ftrace_is_dead(void); |
1155de47 PM |
797 | #else |
798 | static inline int ftrace_trace_task(struct task_struct *task) | |
799 | { | |
800 | return 1; | |
801 | } | |
e0a413f6 | 802 | static inline int ftrace_is_dead(void) { return 0; } |
1155de47 | 803 | #endif |
804a6851 | 804 | |
ced39002 JO |
805 | int ftrace_event_is_function(struct ftrace_event_call *call); |
806 | ||
b63f39ea | 807 | /* |
808 | * struct trace_parser - servers for reading the user input separated by spaces | |
809 | * @cont: set if the input is not complete - no final space char was found | |
810 | * @buffer: holds the parsed user input | |
1537a363 | 811 | * @idx: user input length |
b63f39ea | 812 | * @size: buffer size |
813 | */ | |
814 | struct trace_parser { | |
815 | bool cont; | |
816 | char *buffer; | |
817 | unsigned idx; | |
818 | unsigned size; | |
819 | }; | |
820 | ||
821 | static inline bool trace_parser_loaded(struct trace_parser *parser) | |
822 | { | |
823 | return (parser->idx != 0); | |
824 | } | |
825 | ||
826 | static inline bool trace_parser_cont(struct trace_parser *parser) | |
827 | { | |
828 | return parser->cont; | |
829 | } | |
830 | ||
831 | static inline void trace_parser_clear(struct trace_parser *parser) | |
832 | { | |
833 | parser->cont = false; | |
834 | parser->idx = 0; | |
835 | } | |
836 | ||
837 | extern int trace_parser_get_init(struct trace_parser *parser, int size); | |
838 | extern void trace_parser_put(struct trace_parser *parser); | |
839 | extern int trace_get_user(struct trace_parser *parser, const char __user *ubuf, | |
840 | size_t cnt, loff_t *ppos); | |
841 | ||
4fcdae83 SR |
842 | /* |
843 | * trace_iterator_flags is an enumeration that defines bit | |
844 | * positions into trace_flags that controls the output. | |
845 | * | |
846 | * NOTE: These bits must match the trace_options array in | |
847 | * trace.c. | |
848 | */ | |
4e655519 IM |
849 | enum trace_iterator_flags { |
850 | TRACE_ITER_PRINT_PARENT = 0x01, | |
851 | TRACE_ITER_SYM_OFFSET = 0x02, | |
852 | TRACE_ITER_SYM_ADDR = 0x04, | |
853 | TRACE_ITER_VERBOSE = 0x08, | |
854 | TRACE_ITER_RAW = 0x10, | |
855 | TRACE_ITER_HEX = 0x20, | |
856 | TRACE_ITER_BIN = 0x40, | |
857 | TRACE_ITER_BLOCK = 0x80, | |
858 | TRACE_ITER_STACKTRACE = 0x100, | |
2cbafd68 LZ |
859 | TRACE_ITER_PRINTK = 0x200, |
860 | TRACE_ITER_PREEMPTONLY = 0x400, | |
861 | TRACE_ITER_BRANCH = 0x800, | |
862 | TRACE_ITER_ANNOTATE = 0x1000, | |
863 | TRACE_ITER_USERSTACKTRACE = 0x2000, | |
864 | TRACE_ITER_SYM_USEROBJ = 0x4000, | |
865 | TRACE_ITER_PRINTK_MSGONLY = 0x8000, | |
866 | TRACE_ITER_CONTEXT_INFO = 0x10000, /* Print pid/cpu/time */ | |
867 | TRACE_ITER_LATENCY_FMT = 0x20000, | |
868 | TRACE_ITER_SLEEP_TIME = 0x40000, | |
869 | TRACE_ITER_GRAPH_TIME = 0x80000, | |
e870e9a1 | 870 | TRACE_ITER_RECORD_CMD = 0x100000, |
750912fa | 871 | TRACE_ITER_OVERWRITE = 0x200000, |
cf30cf67 | 872 | TRACE_ITER_STOP_ON_FREE = 0x400000, |
77271ce4 | 873 | TRACE_ITER_IRQ_INFO = 0x800000, |
5224c3a3 | 874 | TRACE_ITER_MARKERS = 0x1000000, |
328df475 | 875 | TRACE_ITER_FUNCTION = 0x2000000, |
6fa3eb70 | 876 | TRACE_ITER_TGID = 0x4000000, |
4e655519 IM |
877 | }; |
878 | ||
15e6cb36 FW |
879 | /* |
880 | * TRACE_ITER_SYM_MASK masks the options in trace_flags that | |
881 | * control the output of kernel symbols. | |
882 | */ | |
883 | #define TRACE_ITER_SYM_MASK \ | |
884 | (TRACE_ITER_PRINT_PARENT|TRACE_ITER_SYM_OFFSET|TRACE_ITER_SYM_ADDR) | |
885 | ||
43a15386 FW |
886 | extern struct tracer nop_trace; |
887 | ||
2ed84eeb | 888 | #ifdef CONFIG_BRANCH_TRACER |
9f029e83 SR |
889 | extern int enable_branch_tracing(struct trace_array *tr); |
890 | extern void disable_branch_tracing(void); | |
891 | static inline int trace_branch_enable(struct trace_array *tr) | |
52f232cb | 892 | { |
9f029e83 SR |
893 | if (trace_flags & TRACE_ITER_BRANCH) |
894 | return enable_branch_tracing(tr); | |
52f232cb SR |
895 | return 0; |
896 | } | |
9f029e83 | 897 | static inline void trace_branch_disable(void) |
52f232cb SR |
898 | { |
899 | /* due to races, always disable */ | |
9f029e83 | 900 | disable_branch_tracing(); |
52f232cb SR |
901 | } |
902 | #else | |
9f029e83 | 903 | static inline int trace_branch_enable(struct trace_array *tr) |
52f232cb SR |
904 | { |
905 | return 0; | |
906 | } | |
9f029e83 | 907 | static inline void trace_branch_disable(void) |
52f232cb SR |
908 | { |
909 | } | |
2ed84eeb | 910 | #endif /* CONFIG_BRANCH_TRACER */ |
52f232cb | 911 | |
1852fcce SR |
912 | /* set ring buffers to default size if not already done so */ |
913 | int tracing_update_buffers(void); | |
914 | ||
fd994989 SR |
915 | /* trace event type bit fields, not numeric */ |
916 | enum { | |
917 | TRACE_EVENT_TYPE_PRINTF = 1, | |
918 | TRACE_EVENT_TYPE_RAW = 2, | |
919 | }; | |
920 | ||
cf027f64 TZ |
921 | struct ftrace_event_field { |
922 | struct list_head link; | |
92edca07 SR |
923 | const char *name; |
924 | const char *type; | |
aa38e9fc | 925 | int filter_type; |
cf027f64 TZ |
926 | int offset; |
927 | int size; | |
a118e4d1 | 928 | int is_signed; |
cf027f64 TZ |
929 | }; |
930 | ||
30e673b2 | 931 | struct event_filter { |
c9c53ca0 SR |
932 | int n_preds; /* Number assigned */ |
933 | int a_preds; /* allocated */ | |
74e9e58c | 934 | struct filter_pred *preds; |
61e9dea2 | 935 | struct filter_pred *root; |
8b372562 | 936 | char *filter_string; |
30e673b2 TZ |
937 | }; |
938 | ||
cfb180f3 TZ |
939 | struct event_subsystem { |
940 | struct list_head list; | |
941 | const char *name; | |
1f9963cb | 942 | struct event_filter *filter; |
e9dbfae5 | 943 | int ref_count; |
cfb180f3 TZ |
944 | }; |
945 | ||
ae63b31e SR |
946 | struct ftrace_subsystem_dir { |
947 | struct list_head list; | |
948 | struct event_subsystem *subsystem; | |
949 | struct trace_array *tr; | |
950 | struct dentry *entry; | |
951 | int ref_count; | |
952 | int nr_events; | |
953 | }; | |
954 | ||
61e9dea2 SR |
955 | #define FILTER_PRED_INVALID ((unsigned short)-1) |
956 | #define FILTER_PRED_IS_RIGHT (1 << 15) | |
43cd4145 | 957 | #define FILTER_PRED_FOLD (1 << 15) |
61e9dea2 | 958 | |
bf93f9ed SR |
959 | /* |
960 | * The max preds is the size of unsigned short with | |
961 | * two flags at the MSBs. One bit is used for both the IS_RIGHT | |
962 | * and FOLD flags. The other is reserved. | |
963 | * | |
964 | * 2^14 preds is way more than enough. | |
965 | */ | |
966 | #define MAX_FILTER_PRED 16384 | |
4a3d27e9 | 967 | |
7ce7e424 | 968 | struct filter_pred; |
1889d209 | 969 | struct regex; |
7ce7e424 | 970 | |
58d9a597 | 971 | typedef int (*filter_pred_fn_t) (struct filter_pred *pred, void *event); |
7ce7e424 | 972 | |
1889d209 FW |
973 | typedef int (*regex_match_func)(char *str, struct regex *r, int len); |
974 | ||
3f6fe06d | 975 | enum regex_type { |
b0f1a59a | 976 | MATCH_FULL = 0, |
3f6fe06d FW |
977 | MATCH_FRONT_ONLY, |
978 | MATCH_MIDDLE_ONLY, | |
979 | MATCH_END_ONLY, | |
980 | }; | |
981 | ||
1889d209 FW |
982 | struct regex { |
983 | char pattern[MAX_FILTER_STR_VAL]; | |
984 | int len; | |
985 | int field_len; | |
986 | regex_match_func match; | |
987 | }; | |
988 | ||
7ce7e424 | 989 | struct filter_pred { |
1889d209 FW |
990 | filter_pred_fn_t fn; |
991 | u64 val; | |
992 | struct regex regex; | |
61aaef55 | 993 | unsigned short *ops; |
1d0e78e3 | 994 | struct ftrace_event_field *field; |
1889d209 FW |
995 | int offset; |
996 | int not; | |
997 | int op; | |
61e9dea2 SR |
998 | unsigned short index; |
999 | unsigned short parent; | |
1000 | unsigned short left; | |
1001 | unsigned short right; | |
7ce7e424 TZ |
1002 | }; |
1003 | ||
3f6fe06d FW |
1004 | extern enum regex_type |
1005 | filter_parse_regex(char *buff, int len, char **search, int *not); | |
8b372562 | 1006 | extern void print_event_filter(struct ftrace_event_call *call, |
4bda2d51 | 1007 | struct trace_seq *s); |
8b372562 TZ |
1008 | extern int apply_event_filter(struct ftrace_event_call *call, |
1009 | char *filter_string); | |
ae63b31e | 1010 | extern int apply_subsystem_event_filter(struct ftrace_subsystem_dir *dir, |
8b372562 TZ |
1011 | char *filter_string); |
1012 | extern void print_subsystem_event_filter(struct event_subsystem *system, | |
ac1adc55 | 1013 | struct trace_seq *s); |
aa38e9fc | 1014 | extern int filter_assign_type(const char *type); |
7ce7e424 | 1015 | |
b3a8c6fd J |
1016 | struct ftrace_event_field * |
1017 | trace_find_event_field(struct ftrace_event_call *call, char *name); | |
2e33af02 | 1018 | |
eb02ce01 | 1019 | static inline int |
e1112b4d | 1020 | filter_check_discard(struct ftrace_event_call *call, void *rec, |
eb02ce01 | 1021 | struct ring_buffer *buffer, |
e1112b4d TZ |
1022 | struct ring_buffer_event *event) |
1023 | { | |
553552ce | 1024 | if (unlikely(call->flags & TRACE_EVENT_FL_FILTERED) && |
6fb2915d | 1025 | !filter_match_preds(call->filter, rec)) { |
eb02ce01 TZ |
1026 | ring_buffer_discard_commit(buffer, event); |
1027 | return 1; | |
1028 | } | |
1029 | ||
1030 | return 0; | |
e1112b4d TZ |
1031 | } |
1032 | ||
e870e9a1 | 1033 | extern void trace_event_enable_cmd_record(bool enable); |
277ba044 | 1034 | extern int event_trace_add_tracer(struct dentry *parent, struct trace_array *tr); |
0c8916c3 | 1035 | extern int event_trace_del_tracer(struct trace_array *tr); |
e870e9a1 | 1036 | |
20c8928a | 1037 | extern struct mutex event_mutex; |
a59fd602 | 1038 | extern struct list_head ftrace_events; |
ac199db0 | 1039 | |
e9fb2b6d SR |
1040 | extern const char *__start___trace_bprintk_fmt[]; |
1041 | extern const char *__stop___trace_bprintk_fmt[]; | |
1042 | ||
6fa3eb70 S |
1043 | extern const char *__start___tracepoint_str[]; |
1044 | extern const char *__stop___tracepoint_str[]; | |
1045 | ||
07d777fe | 1046 | void trace_printk_init_buffers(void); |
81698831 | 1047 | void trace_printk_start_comm(void); |
613f04a0 | 1048 | int trace_keep_overwrite(struct tracer *tracer, u32 mask, int set); |
2b6080f2 | 1049 | int set_tracer_flag(struct trace_array *tr, unsigned int mask, int enabled); |
07d777fe | 1050 | |
ca268da6 SRRH |
1051 | /* |
1052 | * Normal trace_printk() and friends allocates special buffers | |
1053 | * to do the manipulation, as well as saves the print formats | |
1054 | * into sections to display. But the trace infrastructure wants | |
1055 | * to use these without the added overhead at the price of being | |
1056 | * a bit slower (used mainly for warnings, where we don't care | |
1057 | * about performance). The internal_trace_puts() is for such | |
1058 | * a purpose. | |
1059 | */ | |
1060 | #define internal_trace_puts(str) __trace_puts(_THIS_IP_, str, strlen(str)) | |
1061 | ||
4e5292ea | 1062 | #undef FTRACE_ENTRY |
02aa3162 | 1063 | #define FTRACE_ENTRY(call, struct_name, id, tstruct, print, filter) \ |
86c38a31 JM |
1064 | extern struct ftrace_event_call \ |
1065 | __attribute__((__aligned__(4))) event_##call; | |
4e5292ea | 1066 | #undef FTRACE_ENTRY_DUP |
02aa3162 JO |
1067 | #define FTRACE_ENTRY_DUP(call, struct_name, id, tstruct, print, filter) \ |
1068 | FTRACE_ENTRY(call, struct_name, id, PARAMS(tstruct), PARAMS(print), \ | |
1069 | filter) | |
4e5292ea | 1070 | #include "trace_entries.h" |
e1112b4d | 1071 | |
6e48b550 | 1072 | #if defined(CONFIG_PERF_EVENTS) && defined(CONFIG_FUNCTION_TRACER) |
ced39002 JO |
1073 | int perf_ftrace_event_register(struct ftrace_event_call *call, |
1074 | enum trace_reg type, void *data); | |
1075 | #else | |
1076 | #define perf_ftrace_event_register NULL | |
6e48b550 | 1077 | #endif |
ced39002 | 1078 | |
bc0c38d1 | 1079 | #endif /* _LINUX_KERNEL_TRACE_H */ |