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> | |
5 | #include <asm/atomic.h> | |
6 | #include <linux/sched.h> | |
7 | #include <linux/clocksource.h> | |
bd8ac686 | 8 | #include <linux/mmiotrace.h> |
bc0c38d1 | 9 | |
72829bc3 TG |
10 | enum trace_type { |
11 | __TRACE_FIRST_TYPE = 0, | |
12 | ||
13 | TRACE_FN, | |
14 | TRACE_CTX, | |
15 | TRACE_WAKE, | |
dd0e545f | 16 | TRACE_CONT, |
72829bc3 | 17 | TRACE_STACK, |
dd0e545f | 18 | TRACE_PRINT, |
72829bc3 | 19 | TRACE_SPECIAL, |
bd8ac686 PP |
20 | TRACE_MMIO_RW, |
21 | TRACE_MMIO_MAP, | |
72829bc3 TG |
22 | |
23 | __TRACE_LAST_TYPE | |
24 | }; | |
25 | ||
bc0c38d1 SR |
26 | /* |
27 | * Function trace entry - function address and parent function addres: | |
28 | */ | |
29 | struct ftrace_entry { | |
30 | unsigned long ip; | |
31 | unsigned long parent_ip; | |
32 | }; | |
33 | ||
34 | /* | |
35 | * Context switch trace entry - which task (and prio) we switched from/to: | |
36 | */ | |
37 | struct ctx_switch_entry { | |
38 | unsigned int prev_pid; | |
39 | unsigned char prev_prio; | |
40 | unsigned char prev_state; | |
41 | unsigned int next_pid; | |
42 | unsigned char next_prio; | |
bac524d3 | 43 | unsigned char next_state; |
80b5e940 | 44 | unsigned int next_cpu; |
bc0c38d1 SR |
45 | }; |
46 | ||
f0a920d5 IM |
47 | /* |
48 | * Special (free-form) trace entry: | |
49 | */ | |
50 | struct special_entry { | |
51 | unsigned long arg1; | |
52 | unsigned long arg2; | |
53 | unsigned long arg3; | |
54 | }; | |
55 | ||
86387f7e IM |
56 | /* |
57 | * Stack-trace entry: | |
58 | */ | |
59 | ||
74f4e369 | 60 | #define FTRACE_STACK_ENTRIES 8 |
86387f7e IM |
61 | |
62 | struct stack_entry { | |
63 | unsigned long caller[FTRACE_STACK_ENTRIES]; | |
64 | }; | |
65 | ||
dd0e545f SR |
66 | /* |
67 | * ftrace_printk entry: | |
68 | */ | |
69 | struct print_entry { | |
70 | unsigned long ip; | |
71 | char buf[]; | |
72 | }; | |
73 | ||
fc5e27ae PP |
74 | /* |
75 | * trace_flag_type is an enumeration that holds different | |
76 | * states when a trace occurs. These are: | |
77 | * IRQS_OFF - interrupts were disabled | |
78 | * NEED_RESCED - reschedule is requested | |
79 | * HARDIRQ - inside an interrupt handler | |
80 | * SOFTIRQ - inside a softirq handler | |
81 | * CONT - multiple entries hold the trace item | |
82 | */ | |
83 | enum trace_flag_type { | |
84 | TRACE_FLAG_IRQS_OFF = 0x01, | |
85 | TRACE_FLAG_NEED_RESCHED = 0x02, | |
86 | TRACE_FLAG_HARDIRQ = 0x04, | |
87 | TRACE_FLAG_SOFTIRQ = 0x08, | |
88 | TRACE_FLAG_CONT = 0x10, | |
89 | }; | |
90 | ||
bc0c38d1 | 91 | /* |
2e2ca155 | 92 | * The trace field - the most basic unit of tracing. This is what |
bc0c38d1 SR |
93 | * is printed in the end as a single line in the trace output, such as: |
94 | * | |
95 | * bash-15816 [01] 235.197585: idle_cpu <- irq_enter | |
96 | */ | |
2e2ca155 | 97 | struct trace_field { |
bc0c38d1 SR |
98 | char cpu; |
99 | char flags; | |
100 | char preempt_count; | |
101 | int pid; | |
102 | cycle_t t; | |
bc0c38d1 SR |
103 | union { |
104 | struct ftrace_entry fn; | |
105 | struct ctx_switch_entry ctx; | |
f0a920d5 | 106 | struct special_entry special; |
86387f7e | 107 | struct stack_entry stack; |
dd0e545f | 108 | struct print_entry print; |
bd8ac686 PP |
109 | struct mmiotrace_rw mmiorw; |
110 | struct mmiotrace_map mmiomap; | |
bc0c38d1 SR |
111 | }; |
112 | }; | |
113 | ||
2e2ca155 SR |
114 | struct trace_field_cont { |
115 | char buf[sizeof(struct trace_field)]; | |
116 | }; | |
117 | ||
118 | struct trace_entry { | |
119 | char type; | |
120 | union { | |
121 | struct trace_field field; | |
122 | struct trace_field_cont cont; | |
123 | }; | |
124 | }; | |
125 | ||
bc0c38d1 SR |
126 | #define TRACE_ENTRY_SIZE sizeof(struct trace_entry) |
127 | ||
128 | /* | |
129 | * The CPU trace array - it consists of thousands of trace entries | |
130 | * plus some other descriptor data: (for example which task started | |
131 | * the trace, etc.) | |
132 | */ | |
133 | struct trace_array_cpu { | |
4c11d7ae | 134 | struct list_head trace_pages; |
bc0c38d1 | 135 | atomic_t disabled; |
92205c23 | 136 | raw_spinlock_t lock; |
d4c5a2f5 | 137 | struct lock_class_key lock_key; |
4e3c3333 | 138 | |
c7aafc54 | 139 | /* these fields get copied into max-trace: */ |
93a588f4 SR |
140 | unsigned trace_head_idx; |
141 | unsigned trace_tail_idx; | |
142 | void *trace_head; /* producer */ | |
143 | void *trace_tail; /* consumer */ | |
c7aafc54 | 144 | unsigned long trace_idx; |
53d0aa77 | 145 | unsigned long overrun; |
bc0c38d1 SR |
146 | unsigned long saved_latency; |
147 | unsigned long critical_start; | |
148 | unsigned long critical_end; | |
149 | unsigned long critical_sequence; | |
150 | unsigned long nice; | |
151 | unsigned long policy; | |
152 | unsigned long rt_priority; | |
153 | cycle_t preempt_timestamp; | |
154 | pid_t pid; | |
155 | uid_t uid; | |
156 | char comm[TASK_COMM_LEN]; | |
157 | }; | |
158 | ||
159 | struct trace_iterator; | |
160 | ||
161 | /* | |
162 | * The trace array - an array of per-CPU trace arrays. This is the | |
163 | * highest level data structure that individual tracers deal with. | |
164 | * They have on/off state as well: | |
165 | */ | |
166 | struct trace_array { | |
167 | unsigned long entries; | |
168 | long ctrl; | |
169 | int cpu; | |
170 | cycle_t time_start; | |
b3806b43 | 171 | struct task_struct *waiter; |
bc0c38d1 SR |
172 | struct trace_array_cpu *data[NR_CPUS]; |
173 | }; | |
174 | ||
175 | /* | |
176 | * A specific tracer, represented by methods that operate on a trace array: | |
177 | */ | |
178 | struct tracer { | |
179 | const char *name; | |
180 | void (*init)(struct trace_array *tr); | |
181 | void (*reset)(struct trace_array *tr); | |
182 | void (*open)(struct trace_iterator *iter); | |
107bad8b | 183 | void (*pipe_open)(struct trace_iterator *iter); |
bc0c38d1 SR |
184 | void (*close)(struct trace_iterator *iter); |
185 | void (*start)(struct trace_iterator *iter); | |
186 | void (*stop)(struct trace_iterator *iter); | |
107bad8b SR |
187 | ssize_t (*read)(struct trace_iterator *iter, |
188 | struct file *filp, char __user *ubuf, | |
189 | size_t cnt, loff_t *ppos); | |
bc0c38d1 | 190 | void (*ctrl_update)(struct trace_array *tr); |
60a11774 SR |
191 | #ifdef CONFIG_FTRACE_STARTUP_TEST |
192 | int (*selftest)(struct tracer *trace, | |
193 | struct trace_array *tr); | |
194 | #endif | |
72829bc3 | 195 | int (*print_line)(struct trace_iterator *iter); |
bc0c38d1 SR |
196 | struct tracer *next; |
197 | int print_max; | |
198 | }; | |
199 | ||
214023c3 SR |
200 | struct trace_seq { |
201 | unsigned char buffer[PAGE_SIZE]; | |
202 | unsigned int len; | |
6c6c2796 | 203 | unsigned int readpos; |
214023c3 SR |
204 | }; |
205 | ||
bc0c38d1 SR |
206 | /* |
207 | * Trace iterator - used by printout routines who present trace | |
208 | * results to users and which routines might sleep, etc: | |
209 | */ | |
210 | struct trace_iterator { | |
211 | struct trace_array *tr; | |
212 | struct tracer *trace; | |
107bad8b | 213 | void *private; |
53d0aa77 SR |
214 | long last_overrun[NR_CPUS]; |
215 | long overrun[NR_CPUS]; | |
4e3c3333 | 216 | |
53d0aa77 SR |
217 | /* The below is zeroed out in pipe_read */ |
218 | struct trace_seq seq; | |
bc0c38d1 | 219 | struct trace_entry *ent; |
4e3c3333 IM |
220 | int cpu; |
221 | ||
222 | struct trace_entry *prev_ent; | |
223 | int prev_cpu; | |
224 | ||
bc0c38d1 SR |
225 | unsigned long iter_flags; |
226 | loff_t pos; | |
227 | unsigned long next_idx[NR_CPUS]; | |
4c11d7ae SR |
228 | struct list_head *next_page[NR_CPUS]; |
229 | unsigned next_page_idx[NR_CPUS]; | |
230 | long idx; | |
bc0c38d1 SR |
231 | }; |
232 | ||
45dcd8b8 | 233 | void trace_wake_up(void); |
e309b41d | 234 | void tracing_reset(struct trace_array_cpu *data); |
bc0c38d1 SR |
235 | int tracing_open_generic(struct inode *inode, struct file *filp); |
236 | struct dentry *tracing_init_dentry(void); | |
d618b3e6 IM |
237 | void init_tracer_sysprof_debugfs(struct dentry *d_tracer); |
238 | ||
45dcd8b8 PP |
239 | struct trace_entry *tracing_get_trace_entry(struct trace_array *tr, |
240 | struct trace_array_cpu *data); | |
241 | void tracing_generic_entry_update(struct trace_entry *entry, | |
242 | unsigned long flags); | |
243 | ||
bc0c38d1 SR |
244 | void ftrace(struct trace_array *tr, |
245 | struct trace_array_cpu *data, | |
246 | unsigned long ip, | |
247 | unsigned long parent_ip, | |
248 | unsigned long flags); | |
249 | void tracing_sched_switch_trace(struct trace_array *tr, | |
250 | struct trace_array_cpu *data, | |
251 | struct task_struct *prev, | |
252 | struct task_struct *next, | |
253 | unsigned long flags); | |
254 | void tracing_record_cmdline(struct task_struct *tsk); | |
57422797 IM |
255 | |
256 | void tracing_sched_wakeup_trace(struct trace_array *tr, | |
257 | struct trace_array_cpu *data, | |
258 | struct task_struct *wakee, | |
259 | struct task_struct *cur, | |
260 | unsigned long flags); | |
f0a920d5 IM |
261 | void trace_special(struct trace_array *tr, |
262 | struct trace_array_cpu *data, | |
263 | unsigned long arg1, | |
264 | unsigned long arg2, | |
265 | unsigned long arg3); | |
6fb44b71 SR |
266 | void trace_function(struct trace_array *tr, |
267 | struct trace_array_cpu *data, | |
268 | unsigned long ip, | |
269 | unsigned long parent_ip, | |
270 | unsigned long flags); | |
bc0c38d1 | 271 | |
41bc8144 SR |
272 | void tracing_start_cmdline_record(void); |
273 | void tracing_stop_cmdline_record(void); | |
bc0c38d1 SR |
274 | int register_tracer(struct tracer *type); |
275 | void unregister_tracer(struct tracer *type); | |
276 | ||
277 | extern unsigned long nsecs_to_usecs(unsigned long nsecs); | |
278 | ||
279 | extern unsigned long tracing_max_latency; | |
280 | extern unsigned long tracing_thresh; | |
281 | ||
282 | void update_max_tr(struct trace_array *tr, struct task_struct *tsk, int cpu); | |
283 | void update_max_tr_single(struct trace_array *tr, | |
284 | struct task_struct *tsk, int cpu); | |
285 | ||
e309b41d | 286 | extern cycle_t ftrace_now(int cpu); |
bc0c38d1 | 287 | |
001b6767 SR |
288 | #ifdef CONFIG_FTRACE |
289 | void tracing_start_function_trace(void); | |
290 | void tracing_stop_function_trace(void); | |
291 | #else | |
292 | # define tracing_start_function_trace() do { } while (0) | |
293 | # define tracing_stop_function_trace() do { } while (0) | |
294 | #endif | |
295 | ||
bc0c38d1 SR |
296 | #ifdef CONFIG_CONTEXT_SWITCH_TRACER |
297 | typedef void | |
298 | (*tracer_switch_func_t)(void *private, | |
5b82a1b0 | 299 | void *__rq, |
bc0c38d1 SR |
300 | struct task_struct *prev, |
301 | struct task_struct *next); | |
302 | ||
303 | struct tracer_switch_ops { | |
304 | tracer_switch_func_t func; | |
305 | void *private; | |
306 | struct tracer_switch_ops *next; | |
307 | }; | |
308 | ||
bc0c38d1 SR |
309 | #endif /* CONFIG_CONTEXT_SWITCH_TRACER */ |
310 | ||
311 | #ifdef CONFIG_DYNAMIC_FTRACE | |
312 | extern unsigned long ftrace_update_tot_cnt; | |
d05cdb25 SR |
313 | #define DYN_FTRACE_TEST_NAME trace_selftest_dynamic_test_func |
314 | extern int DYN_FTRACE_TEST_NAME(void); | |
bc0c38d1 SR |
315 | #endif |
316 | ||
60a11774 SR |
317 | #ifdef CONFIG_FTRACE_STARTUP_TEST |
318 | #ifdef CONFIG_FTRACE | |
319 | extern int trace_selftest_startup_function(struct tracer *trace, | |
320 | struct trace_array *tr); | |
321 | #endif | |
322 | #ifdef CONFIG_IRQSOFF_TRACER | |
323 | extern int trace_selftest_startup_irqsoff(struct tracer *trace, | |
324 | struct trace_array *tr); | |
325 | #endif | |
326 | #ifdef CONFIG_PREEMPT_TRACER | |
327 | extern int trace_selftest_startup_preemptoff(struct tracer *trace, | |
328 | struct trace_array *tr); | |
329 | #endif | |
330 | #if defined(CONFIG_IRQSOFF_TRACER) && defined(CONFIG_PREEMPT_TRACER) | |
331 | extern int trace_selftest_startup_preemptirqsoff(struct tracer *trace, | |
332 | struct trace_array *tr); | |
333 | #endif | |
334 | #ifdef CONFIG_SCHED_TRACER | |
335 | extern int trace_selftest_startup_wakeup(struct tracer *trace, | |
336 | struct trace_array *tr); | |
337 | #endif | |
338 | #ifdef CONFIG_CONTEXT_SWITCH_TRACER | |
339 | extern int trace_selftest_startup_sched_switch(struct tracer *trace, | |
340 | struct trace_array *tr); | |
341 | #endif | |
a6dd24f8 IM |
342 | #ifdef CONFIG_SYSPROF_TRACER |
343 | extern int trace_selftest_startup_sysprof(struct tracer *trace, | |
344 | struct trace_array *tr); | |
345 | #endif | |
60a11774 SR |
346 | #endif /* CONFIG_FTRACE_STARTUP_TEST */ |
347 | ||
c7aafc54 | 348 | extern void *head_page(struct trace_array_cpu *data); |
72829bc3 | 349 | extern int trace_seq_printf(struct trace_seq *s, const char *fmt, ...); |
fc5e27ae PP |
350 | extern void trace_seq_print_cont(struct trace_seq *s, |
351 | struct trace_iterator *iter); | |
6c6c2796 PP |
352 | extern ssize_t trace_seq_to_user(struct trace_seq *s, char __user *ubuf, |
353 | size_t cnt); | |
72829bc3 | 354 | extern long ns2usecs(cycle_t nsec); |
801fe400 | 355 | extern int trace_vprintk(unsigned long ip, const char *fmt, va_list args); |
c7aafc54 | 356 | |
4e655519 IM |
357 | extern unsigned long trace_flags; |
358 | ||
4fcdae83 SR |
359 | /* |
360 | * trace_iterator_flags is an enumeration that defines bit | |
361 | * positions into trace_flags that controls the output. | |
362 | * | |
363 | * NOTE: These bits must match the trace_options array in | |
364 | * trace.c. | |
365 | */ | |
4e655519 IM |
366 | enum trace_iterator_flags { |
367 | TRACE_ITER_PRINT_PARENT = 0x01, | |
368 | TRACE_ITER_SYM_OFFSET = 0x02, | |
369 | TRACE_ITER_SYM_ADDR = 0x04, | |
370 | TRACE_ITER_VERBOSE = 0x08, | |
371 | TRACE_ITER_RAW = 0x10, | |
372 | TRACE_ITER_HEX = 0x20, | |
373 | TRACE_ITER_BIN = 0x40, | |
374 | TRACE_ITER_BLOCK = 0x80, | |
375 | TRACE_ITER_STACKTRACE = 0x100, | |
4ac3ba41 | 376 | TRACE_ITER_SCHED_TREE = 0x200, |
f09ce573 | 377 | TRACE_ITER_PRINTK = 0x400, |
4e655519 IM |
378 | }; |
379 | ||
bc0c38d1 | 380 | #endif /* _LINUX_KERNEL_TRACE_H */ |