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> |
97f20251 SR |
8 | |
9 | struct trace_array; | |
10 | struct tracer; | |
6d723736 | 11 | struct dentry; |
97f20251 | 12 | |
be74b73a SR |
13 | DECLARE_PER_CPU(struct trace_seq, ftrace_event_seq); |
14 | ||
15 | struct trace_print_flags { | |
16 | unsigned long mask; | |
17 | const char *name; | |
18 | }; | |
19 | ||
20 | const char *ftrace_print_flags_seq(struct trace_seq *p, const char *delim, | |
21 | unsigned long flags, | |
22 | const struct trace_print_flags *flag_array); | |
23 | ||
0f4fc29d SR |
24 | const char *ftrace_print_symbols_seq(struct trace_seq *p, unsigned long val, |
25 | const struct trace_print_flags *symbol_array); | |
26 | ||
97f20251 SR |
27 | /* |
28 | * The trace entry - the most basic unit of tracing. This is what | |
29 | * is printed in the end as a single line in the trace output, such as: | |
30 | * | |
31 | * bash-15816 [01] 235.197585: idle_cpu <- irq_enter | |
32 | */ | |
33 | struct trace_entry { | |
89ec0dee | 34 | unsigned short type; |
97f20251 SR |
35 | unsigned char flags; |
36 | unsigned char preempt_count; | |
37 | int pid; | |
637e7e86 | 38 | int lock_depth; |
97f20251 SR |
39 | }; |
40 | ||
89ec0dee SR |
41 | #define FTRACE_MAX_EVENT \ |
42 | ((1 << (sizeof(((struct trace_entry *)0)->type) * 8)) - 1) | |
43 | ||
97f20251 SR |
44 | /* |
45 | * Trace iterator - used by printout routines who present trace | |
46 | * results to users and which routines might sleep, etc: | |
47 | */ | |
48 | struct trace_iterator { | |
49 | struct trace_array *tr; | |
50 | struct tracer *trace; | |
51 | void *private; | |
52 | int cpu_file; | |
53 | struct mutex mutex; | |
54 | struct ring_buffer_iter *buffer_iter[NR_CPUS]; | |
112f38a7 | 55 | unsigned long iter_flags; |
97f20251 SR |
56 | |
57 | /* The below is zeroed out in pipe_read */ | |
58 | struct trace_seq seq; | |
59 | struct trace_entry *ent; | |
a63ce5b3 | 60 | int leftover; |
97f20251 SR |
61 | int cpu; |
62 | u64 ts; | |
63 | ||
97f20251 SR |
64 | loff_t pos; |
65 | long idx; | |
66 | ||
67 | cpumask_var_t started; | |
68 | }; | |
69 | ||
70 | ||
71 | typedef enum print_line_t (*trace_print_func)(struct trace_iterator *iter, | |
72 | int flags); | |
73 | struct trace_event { | |
74 | struct hlist_node node; | |
060fa5c8 | 75 | struct list_head list; |
97f20251 SR |
76 | int type; |
77 | trace_print_func trace; | |
78 | trace_print_func raw; | |
79 | trace_print_func hex; | |
80 | trace_print_func binary; | |
81 | }; | |
82 | ||
83 | extern int register_ftrace_event(struct trace_event *event); | |
84 | extern int unregister_ftrace_event(struct trace_event *event); | |
85 | ||
86 | /* Return values for print_line callback */ | |
87 | enum print_line_t { | |
88 | TRACE_TYPE_PARTIAL_LINE = 0, /* Retry after flushing the seq */ | |
89 | TRACE_TYPE_HANDLED = 1, | |
90 | TRACE_TYPE_UNHANDLED = 2, /* Relay to other output functions */ | |
91 | TRACE_TYPE_NO_CONSUME = 3 /* Handled but ask to not consume */ | |
92 | }; | |
93 | ||
f413cdb8 FW |
94 | void tracing_generic_entry_update(struct trace_entry *entry, |
95 | unsigned long flags, | |
96 | int pc); | |
97f20251 | 97 | struct ring_buffer_event * |
e77405ad SR |
98 | trace_current_buffer_lock_reserve(struct ring_buffer **current_buffer, |
99 | int type, unsigned long len, | |
97f20251 | 100 | unsigned long flags, int pc); |
e77405ad SR |
101 | void trace_current_buffer_unlock_commit(struct ring_buffer *buffer, |
102 | struct ring_buffer_event *event, | |
97f20251 | 103 | unsigned long flags, int pc); |
e77405ad SR |
104 | void trace_nowake_buffer_unlock_commit(struct ring_buffer *buffer, |
105 | struct ring_buffer_event *event, | |
97f20251 | 106 | unsigned long flags, int pc); |
e77405ad SR |
107 | void trace_current_buffer_discard_commit(struct ring_buffer *buffer, |
108 | struct ring_buffer_event *event); | |
97f20251 SR |
109 | |
110 | void tracing_record_cmdline(struct task_struct *tsk); | |
111 | ||
1f9963cb LZ |
112 | struct event_filter; |
113 | ||
97f20251 | 114 | struct ftrace_event_call { |
a59fd602 | 115 | struct list_head list; |
97f20251 SR |
116 | char *name; |
117 | char *system; | |
118 | struct dentry *dir; | |
6d723736 | 119 | struct trace_event *event; |
97f20251 | 120 | int enabled; |
bd1a5c84 MH |
121 | int (*regfunc)(struct ftrace_event_call *); |
122 | void (*unregfunc)(struct ftrace_event_call *); | |
97f20251 | 123 | int id; |
bd1a5c84 MH |
124 | int (*raw_init)(struct ftrace_event_call *); |
125 | int (*show_format)(struct ftrace_event_call *, | |
126 | struct trace_seq *); | |
14be96c9 | 127 | int (*define_fields)(struct ftrace_event_call *); |
97f20251 | 128 | struct list_head fields; |
30e673b2 | 129 | int filter_active; |
1f9963cb | 130 | struct event_filter *filter; |
6d723736 | 131 | void *mod; |
69fd4f0e | 132 | void *data; |
97f20251 | 133 | |
e00bf2ec | 134 | int profile_count; |
af6af30c PZ |
135 | int (*profile_enable)(struct ftrace_event_call *); |
136 | void (*profile_disable)(struct ftrace_event_call *); | |
97f20251 SR |
137 | }; |
138 | ||
20ab4425 FW |
139 | #define FTRACE_MAX_PROFILE_SIZE 2048 |
140 | ||
ce71b9df FW |
141 | extern char *perf_trace_buf; |
142 | extern char *perf_trace_buf_nmi; | |
20ab4425 | 143 | |
8b372562 | 144 | #define MAX_FILTER_PRED 32 |
16bb8eb1 | 145 | #define MAX_FILTER_STR_VAL 256 /* Should handle KSYM_SYMBOL_LEN */ |
97f20251 | 146 | |
2df75e41 | 147 | extern void destroy_preds(struct ftrace_event_call *call); |
6fb2915d | 148 | extern int filter_match_preds(struct event_filter *filter, void *rec); |
e77405ad SR |
149 | extern int filter_current_check_discard(struct ring_buffer *buffer, |
150 | struct ftrace_event_call *call, | |
97f20251 SR |
151 | void *rec, |
152 | struct ring_buffer_event *event); | |
153 | ||
43b51ead LZ |
154 | enum { |
155 | FILTER_OTHER = 0, | |
156 | FILTER_STATIC_STRING, | |
157 | FILTER_DYN_STRING, | |
87a342f5 | 158 | FILTER_PTR_STRING, |
43b51ead LZ |
159 | }; |
160 | ||
87d9b4e1 | 161 | extern int trace_event_raw_init(struct ftrace_event_call *call); |
aeaeae11 FW |
162 | extern int trace_define_field(struct ftrace_event_call *call, const char *type, |
163 | const char *name, int offset, int size, | |
164 | int is_signed, int filter_type); | |
bd1a5c84 MH |
165 | extern int trace_add_event_call(struct ftrace_event_call *call); |
166 | extern void trace_remove_event_call(struct ftrace_event_call *call); | |
97f20251 | 167 | |
a118e4d1 | 168 | #define is_signed_type(type) (((type)(-1)) < 0) |
97f20251 | 169 | |
4671c794 SR |
170 | int trace_set_clr_event(const char *system, const char *event, int set); |
171 | ||
97f20251 SR |
172 | /* |
173 | * The double __builtin_constant_p is because gcc will give us an error | |
174 | * if we try to allocate the static variable to fmt if it is not a | |
175 | * constant. Even with the outer if statement optimizing out. | |
176 | */ | |
177 | #define event_trace_printk(ip, fmt, args...) \ | |
178 | do { \ | |
179 | __trace_printk_check_format(fmt, ##args); \ | |
180 | tracing_record_cmdline(current); \ | |
181 | if (__builtin_constant_p(fmt)) { \ | |
182 | static const char *trace_printk_fmt \ | |
183 | __attribute__((section("__trace_printk_fmt"))) = \ | |
184 | __builtin_constant_p(fmt) ? fmt : NULL; \ | |
185 | \ | |
186 | __trace_bprintk(ip, trace_printk_fmt, ##args); \ | |
187 | } else \ | |
188 | __trace_printk(ip, fmt, ##args); \ | |
189 | } while (0) | |
190 | ||
6fb2915d LZ |
191 | #ifdef CONFIG_EVENT_PROFILE |
192 | struct perf_event; | |
193 | extern int ftrace_profile_enable(int event_id); | |
194 | extern void ftrace_profile_disable(int event_id); | |
195 | extern int ftrace_profile_set_filter(struct perf_event *event, int event_id, | |
196 | char *filter_str); | |
197 | extern void ftrace_profile_free_filter(struct perf_event *event); | |
198 | #endif | |
199 | ||
97f20251 | 200 | #endif /* _LINUX_FTRACE_EVENT_H */ |