Commit | Line | Data |
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97f20251 SR |
1 | #ifndef _LINUX_FTRACE_EVENT_H |
2 | #define _LINUX_FTRACE_EVENT_H | |
3 | ||
97f20251 | 4 | #include <linux/ring_buffer.h> |
16bb8eb1 | 5 | #include <linux/trace_seq.h> |
be74b73a | 6 | #include <linux/percpu.h> |
20ab4425 | 7 | #include <linux/hardirq.h> |
430ad5a6 | 8 | #include <linux/perf_event.h> |
97f20251 SR |
9 | |
10 | struct trace_array; | |
11 | struct tracer; | |
6d723736 | 12 | struct dentry; |
97f20251 | 13 | |
be74b73a SR |
14 | DECLARE_PER_CPU(struct trace_seq, ftrace_event_seq); |
15 | ||
16 | struct trace_print_flags { | |
17 | unsigned long mask; | |
18 | const char *name; | |
19 | }; | |
20 | ||
21 | const char *ftrace_print_flags_seq(struct trace_seq *p, const char *delim, | |
22 | unsigned long flags, | |
23 | const struct trace_print_flags *flag_array); | |
24 | ||
0f4fc29d SR |
25 | const char *ftrace_print_symbols_seq(struct trace_seq *p, unsigned long val, |
26 | const struct trace_print_flags *symbol_array); | |
27 | ||
97f20251 SR |
28 | /* |
29 | * The trace entry - the most basic unit of tracing. This is what | |
30 | * is printed in the end as a single line in the trace output, such as: | |
31 | * | |
32 | * bash-15816 [01] 235.197585: idle_cpu <- irq_enter | |
33 | */ | |
34 | struct trace_entry { | |
89ec0dee | 35 | unsigned short type; |
97f20251 SR |
36 | unsigned char flags; |
37 | unsigned char preempt_count; | |
38 | int pid; | |
637e7e86 | 39 | int lock_depth; |
97f20251 SR |
40 | }; |
41 | ||
89ec0dee SR |
42 | #define FTRACE_MAX_EVENT \ |
43 | ((1 << (sizeof(((struct trace_entry *)0)->type) * 8)) - 1) | |
44 | ||
97f20251 SR |
45 | /* |
46 | * Trace iterator - used by printout routines who present trace | |
47 | * results to users and which routines might sleep, etc: | |
48 | */ | |
49 | struct trace_iterator { | |
50 | struct trace_array *tr; | |
51 | struct tracer *trace; | |
52 | void *private; | |
53 | int cpu_file; | |
54 | struct mutex mutex; | |
55 | struct ring_buffer_iter *buffer_iter[NR_CPUS]; | |
112f38a7 | 56 | unsigned long iter_flags; |
97f20251 SR |
57 | |
58 | /* The below is zeroed out in pipe_read */ | |
59 | struct trace_seq seq; | |
60 | struct trace_entry *ent; | |
bc21b478 | 61 | unsigned long lost_events; |
a63ce5b3 | 62 | int leftover; |
97f20251 SR |
63 | int cpu; |
64 | u64 ts; | |
65 | ||
97f20251 SR |
66 | loff_t pos; |
67 | long idx; | |
68 | ||
69 | cpumask_var_t started; | |
70 | }; | |
71 | ||
72 | ||
a9a57763 SR |
73 | struct trace_event; |
74 | ||
97f20251 | 75 | typedef enum print_line_t (*trace_print_func)(struct trace_iterator *iter, |
a9a57763 SR |
76 | int flags, struct trace_event *event); |
77 | ||
78 | struct trace_event_functions { | |
97f20251 SR |
79 | trace_print_func trace; |
80 | trace_print_func raw; | |
81 | trace_print_func hex; | |
82 | trace_print_func binary; | |
83 | }; | |
84 | ||
a9a57763 SR |
85 | struct trace_event { |
86 | struct hlist_node node; | |
87 | struct list_head list; | |
88 | int type; | |
89 | struct trace_event_functions *funcs; | |
90 | }; | |
91 | ||
97f20251 SR |
92 | extern int register_ftrace_event(struct trace_event *event); |
93 | extern int unregister_ftrace_event(struct trace_event *event); | |
94 | ||
95 | /* Return values for print_line callback */ | |
96 | enum print_line_t { | |
97 | TRACE_TYPE_PARTIAL_LINE = 0, /* Retry after flushing the seq */ | |
98 | TRACE_TYPE_HANDLED = 1, | |
99 | TRACE_TYPE_UNHANDLED = 2, /* Relay to other output functions */ | |
100 | TRACE_TYPE_NO_CONSUME = 3 /* Handled but ask to not consume */ | |
101 | }; | |
102 | ||
f413cdb8 FW |
103 | void tracing_generic_entry_update(struct trace_entry *entry, |
104 | unsigned long flags, | |
105 | int pc); | |
97f20251 | 106 | struct ring_buffer_event * |
e77405ad SR |
107 | trace_current_buffer_lock_reserve(struct ring_buffer **current_buffer, |
108 | int type, unsigned long len, | |
97f20251 | 109 | unsigned long flags, int pc); |
e77405ad SR |
110 | void trace_current_buffer_unlock_commit(struct ring_buffer *buffer, |
111 | struct ring_buffer_event *event, | |
97f20251 | 112 | unsigned long flags, int pc); |
e77405ad SR |
113 | void trace_nowake_buffer_unlock_commit(struct ring_buffer *buffer, |
114 | struct ring_buffer_event *event, | |
97f20251 | 115 | unsigned long flags, int pc); |
e77405ad SR |
116 | void trace_current_buffer_discard_commit(struct ring_buffer *buffer, |
117 | struct ring_buffer_event *event); | |
97f20251 SR |
118 | |
119 | void tracing_record_cmdline(struct task_struct *tsk); | |
120 | ||
1f9963cb LZ |
121 | struct event_filter; |
122 | ||
2239291a SR |
123 | enum trace_reg { |
124 | TRACE_REG_REGISTER, | |
125 | TRACE_REG_UNREGISTER, | |
126 | TRACE_REG_PERF_REGISTER, | |
127 | TRACE_REG_PERF_UNREGISTER, | |
128 | }; | |
129 | ||
130 | struct ftrace_event_call; | |
131 | ||
8f082018 SR |
132 | struct ftrace_event_class { |
133 | char *system; | |
2239291a SR |
134 | void *probe; |
135 | #ifdef CONFIG_PERF_EVENTS | |
136 | void *perf_probe; | |
137 | #endif | |
138 | int (*reg)(struct ftrace_event_call *event, | |
139 | enum trace_reg type); | |
2e33af02 SR |
140 | int (*define_fields)(struct ftrace_event_call *); |
141 | struct list_head *(*get_fields)(struct ftrace_event_call *); | |
142 | struct list_head fields; | |
0405ab80 | 143 | int (*raw_init)(struct ftrace_event_call *); |
8f082018 SR |
144 | }; |
145 | ||
97f20251 | 146 | struct ftrace_event_call { |
a59fd602 | 147 | struct list_head list; |
8f082018 | 148 | struct ftrace_event_class *class; |
97f20251 | 149 | char *name; |
97f20251 | 150 | struct dentry *dir; |
80decc70 | 151 | struct trace_event event; |
97f20251 | 152 | int enabled; |
97f20251 | 153 | int id; |
509e760c | 154 | const char *print_fmt; |
30e673b2 | 155 | int filter_active; |
1f9963cb | 156 | struct event_filter *filter; |
6d723736 | 157 | void *mod; |
69fd4f0e | 158 | void *data; |
97f20251 | 159 | |
97d5a220 | 160 | int perf_refcount; |
97f20251 SR |
161 | }; |
162 | ||
97d5a220 | 163 | #define PERF_MAX_TRACE_SIZE 2048 |
20ab4425 | 164 | |
8b372562 | 165 | #define MAX_FILTER_PRED 32 |
16bb8eb1 | 166 | #define MAX_FILTER_STR_VAL 256 /* Should handle KSYM_SYMBOL_LEN */ |
97f20251 | 167 | |
2df75e41 | 168 | extern void destroy_preds(struct ftrace_event_call *call); |
6fb2915d | 169 | extern int filter_match_preds(struct event_filter *filter, void *rec); |
e77405ad SR |
170 | extern int filter_current_check_discard(struct ring_buffer *buffer, |
171 | struct ftrace_event_call *call, | |
97f20251 SR |
172 | void *rec, |
173 | struct ring_buffer_event *event); | |
174 | ||
43b51ead LZ |
175 | enum { |
176 | FILTER_OTHER = 0, | |
177 | FILTER_STATIC_STRING, | |
178 | FILTER_DYN_STRING, | |
87a342f5 | 179 | FILTER_PTR_STRING, |
43b51ead LZ |
180 | }; |
181 | ||
87d9b4e1 | 182 | extern int trace_event_raw_init(struct ftrace_event_call *call); |
aeaeae11 FW |
183 | extern int trace_define_field(struct ftrace_event_call *call, const char *type, |
184 | const char *name, int offset, int size, | |
185 | int is_signed, int filter_type); | |
bd1a5c84 MH |
186 | extern int trace_add_event_call(struct ftrace_event_call *call); |
187 | extern void trace_remove_event_call(struct ftrace_event_call *call); | |
97f20251 | 188 | |
a118e4d1 | 189 | #define is_signed_type(type) (((type)(-1)) < 0) |
97f20251 | 190 | |
4671c794 SR |
191 | int trace_set_clr_event(const char *system, const char *event, int set); |
192 | ||
97f20251 SR |
193 | /* |
194 | * The double __builtin_constant_p is because gcc will give us an error | |
195 | * if we try to allocate the static variable to fmt if it is not a | |
196 | * constant. Even with the outer if statement optimizing out. | |
197 | */ | |
198 | #define event_trace_printk(ip, fmt, args...) \ | |
199 | do { \ | |
200 | __trace_printk_check_format(fmt, ##args); \ | |
201 | tracing_record_cmdline(current); \ | |
202 | if (__builtin_constant_p(fmt)) { \ | |
203 | static const char *trace_printk_fmt \ | |
204 | __attribute__((section("__trace_printk_fmt"))) = \ | |
205 | __builtin_constant_p(fmt) ? fmt : NULL; \ | |
206 | \ | |
207 | __trace_bprintk(ip, trace_printk_fmt, ##args); \ | |
208 | } else \ | |
209 | __trace_printk(ip, fmt, ##args); \ | |
210 | } while (0) | |
211 | ||
07b139c8 | 212 | #ifdef CONFIG_PERF_EVENTS |
6fb2915d | 213 | struct perf_event; |
c530665c FW |
214 | |
215 | DECLARE_PER_CPU(struct pt_regs, perf_trace_regs); | |
216 | ||
97d5a220 FW |
217 | extern int perf_trace_enable(int event_id); |
218 | extern void perf_trace_disable(int event_id); | |
6fb2915d LZ |
219 | extern int ftrace_profile_set_filter(struct perf_event *event, int event_id, |
220 | char *filter_str); | |
221 | extern void ftrace_profile_free_filter(struct perf_event *event); | |
430ad5a6 | 222 | extern void * |
97d5a220 | 223 | perf_trace_buf_prepare(int size, unsigned short type, int *rctxp, |
430ad5a6 XG |
224 | unsigned long *irq_flags); |
225 | ||
226 | static inline void | |
97d5a220 | 227 | perf_trace_buf_submit(void *raw_data, int size, int rctx, u64 addr, |
c530665c | 228 | u64 count, unsigned long irq_flags, struct pt_regs *regs) |
430ad5a6 XG |
229 | { |
230 | struct trace_entry *entry = raw_data; | |
231 | ||
c530665c | 232 | perf_tp_event(entry->type, addr, count, raw_data, size, regs); |
430ad5a6 XG |
233 | perf_swevent_put_recursion_context(rctx); |
234 | local_irq_restore(irq_flags); | |
235 | } | |
6fb2915d LZ |
236 | #endif |
237 | ||
97f20251 | 238 | #endif /* _LINUX_FTRACE_EVENT_H */ |