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; | |
60 | int cpu; | |
61 | u64 ts; | |
62 | ||
97f20251 SR |
63 | loff_t pos; |
64 | long idx; | |
65 | ||
66 | cpumask_var_t started; | |
67 | }; | |
68 | ||
69 | ||
70 | typedef enum print_line_t (*trace_print_func)(struct trace_iterator *iter, | |
71 | int flags); | |
72 | struct trace_event { | |
73 | struct hlist_node node; | |
060fa5c8 | 74 | struct list_head list; |
97f20251 SR |
75 | int type; |
76 | trace_print_func trace; | |
77 | trace_print_func raw; | |
78 | trace_print_func hex; | |
79 | trace_print_func binary; | |
80 | }; | |
81 | ||
82 | extern int register_ftrace_event(struct trace_event *event); | |
83 | extern int unregister_ftrace_event(struct trace_event *event); | |
84 | ||
85 | /* Return values for print_line callback */ | |
86 | enum print_line_t { | |
87 | TRACE_TYPE_PARTIAL_LINE = 0, /* Retry after flushing the seq */ | |
88 | TRACE_TYPE_HANDLED = 1, | |
89 | TRACE_TYPE_UNHANDLED = 2, /* Relay to other output functions */ | |
90 | TRACE_TYPE_NO_CONSUME = 3 /* Handled but ask to not consume */ | |
91 | }; | |
92 | ||
f413cdb8 FW |
93 | void tracing_generic_entry_update(struct trace_entry *entry, |
94 | unsigned long flags, | |
95 | int pc); | |
97f20251 | 96 | struct ring_buffer_event * |
e77405ad SR |
97 | trace_current_buffer_lock_reserve(struct ring_buffer **current_buffer, |
98 | int type, unsigned long len, | |
97f20251 | 99 | unsigned long flags, int pc); |
e77405ad SR |
100 | void trace_current_buffer_unlock_commit(struct ring_buffer *buffer, |
101 | struct ring_buffer_event *event, | |
97f20251 | 102 | unsigned long flags, int pc); |
e77405ad SR |
103 | void trace_nowake_buffer_unlock_commit(struct ring_buffer *buffer, |
104 | struct ring_buffer_event *event, | |
97f20251 | 105 | unsigned long flags, int pc); |
e77405ad SR |
106 | void trace_current_buffer_discard_commit(struct ring_buffer *buffer, |
107 | struct ring_buffer_event *event); | |
97f20251 SR |
108 | |
109 | void tracing_record_cmdline(struct task_struct *tsk); | |
110 | ||
1f9963cb LZ |
111 | struct event_filter; |
112 | ||
97f20251 | 113 | struct ftrace_event_call { |
a59fd602 | 114 | struct list_head list; |
97f20251 SR |
115 | char *name; |
116 | char *system; | |
117 | struct dentry *dir; | |
6d723736 | 118 | struct trace_event *event; |
97f20251 | 119 | int enabled; |
bd1a5c84 MH |
120 | int (*regfunc)(struct ftrace_event_call *); |
121 | void (*unregfunc)(struct ftrace_event_call *); | |
97f20251 | 122 | int id; |
bd1a5c84 MH |
123 | int (*raw_init)(struct ftrace_event_call *); |
124 | int (*show_format)(struct ftrace_event_call *, | |
125 | struct trace_seq *); | |
14be96c9 | 126 | int (*define_fields)(struct ftrace_event_call *); |
97f20251 | 127 | struct list_head fields; |
30e673b2 | 128 | int filter_active; |
1f9963cb | 129 | struct event_filter *filter; |
6d723736 | 130 | void *mod; |
69fd4f0e | 131 | void *data; |
97f20251 | 132 | |
af6af30c PZ |
133 | atomic_t profile_count; |
134 | int (*profile_enable)(struct ftrace_event_call *); | |
135 | void (*profile_disable)(struct ftrace_event_call *); | |
97f20251 SR |
136 | }; |
137 | ||
20ab4425 FW |
138 | #define FTRACE_MAX_PROFILE_SIZE 2048 |
139 | ||
444a2a3b FW |
140 | struct perf_trace_buf { |
141 | char buf[FTRACE_MAX_PROFILE_SIZE]; | |
142 | int recursion; | |
143 | }; | |
144 | ||
145 | extern struct perf_trace_buf *perf_trace_buf; | |
146 | extern struct perf_trace_buf *perf_trace_buf_nmi; | |
20ab4425 | 147 | |
8b372562 | 148 | #define MAX_FILTER_PRED 32 |
16bb8eb1 | 149 | #define MAX_FILTER_STR_VAL 256 /* Should handle KSYM_SYMBOL_LEN */ |
97f20251 | 150 | |
2df75e41 | 151 | extern void destroy_preds(struct ftrace_event_call *call); |
6fb2915d | 152 | extern int filter_match_preds(struct event_filter *filter, void *rec); |
e77405ad SR |
153 | extern int filter_current_check_discard(struct ring_buffer *buffer, |
154 | struct ftrace_event_call *call, | |
97f20251 SR |
155 | void *rec, |
156 | struct ring_buffer_event *event); | |
157 | ||
43b51ead LZ |
158 | enum { |
159 | FILTER_OTHER = 0, | |
160 | FILTER_STATIC_STRING, | |
161 | FILTER_DYN_STRING, | |
87a342f5 | 162 | FILTER_PTR_STRING, |
43b51ead LZ |
163 | }; |
164 | ||
e647d6b3 | 165 | extern int trace_define_common_fields(struct ftrace_event_call *call); |
aeaeae11 FW |
166 | extern int trace_define_field(struct ftrace_event_call *call, const char *type, |
167 | const char *name, int offset, int size, | |
168 | int is_signed, int filter_type); | |
bd1a5c84 MH |
169 | extern int trace_add_event_call(struct ftrace_event_call *call); |
170 | extern void trace_remove_event_call(struct ftrace_event_call *call); | |
97f20251 | 171 | |
a118e4d1 | 172 | #define is_signed_type(type) (((type)(-1)) < 0) |
97f20251 | 173 | |
4671c794 SR |
174 | int trace_set_clr_event(const char *system, const char *event, int set); |
175 | ||
97f20251 SR |
176 | /* |
177 | * The double __builtin_constant_p is because gcc will give us an error | |
178 | * if we try to allocate the static variable to fmt if it is not a | |
179 | * constant. Even with the outer if statement optimizing out. | |
180 | */ | |
181 | #define event_trace_printk(ip, fmt, args...) \ | |
182 | do { \ | |
183 | __trace_printk_check_format(fmt, ##args); \ | |
184 | tracing_record_cmdline(current); \ | |
185 | if (__builtin_constant_p(fmt)) { \ | |
186 | static const char *trace_printk_fmt \ | |
187 | __attribute__((section("__trace_printk_fmt"))) = \ | |
188 | __builtin_constant_p(fmt) ? fmt : NULL; \ | |
189 | \ | |
190 | __trace_bprintk(ip, trace_printk_fmt, ##args); \ | |
191 | } else \ | |
192 | __trace_printk(ip, fmt, ##args); \ | |
193 | } while (0) | |
194 | ||
6fb2915d LZ |
195 | #ifdef CONFIG_EVENT_PROFILE |
196 | struct perf_event; | |
197 | extern int ftrace_profile_enable(int event_id); | |
198 | extern void ftrace_profile_disable(int event_id); | |
199 | extern int ftrace_profile_set_filter(struct perf_event *event, int event_id, | |
200 | char *filter_str); | |
201 | extern void ftrace_profile_free_filter(struct perf_event *event); | |
202 | #endif | |
203 | ||
97f20251 | 204 | #endif /* _LINUX_FTRACE_EVENT_H */ |