1 /* SPDX-License-Identifier: GPL-2.0 */ 1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _LINUX_TRACE_H 2 #ifndef _LINUX_TRACE_H
3 #define _LINUX_TRACE_H 3 #define _LINUX_TRACE_H
4 4
5 #define TRACE_EXPORT_FUNCTION BIT(0) !! 5 #ifdef CONFIG_TRACING
6 #define TRACE_EXPORT_EVENT BIT(1) <<
7 #define TRACE_EXPORT_MARKER BIT(2) <<
8 <<
9 /* 6 /*
10 * The trace export - an export of Ftrace outp 7 * The trace export - an export of Ftrace output. The trace_export
11 * can process traces and export them to a reg 8 * can process traces and export them to a registered destination as
12 * an addition to the current only output of F 9 * an addition to the current only output of Ftrace - i.e. ring buffer.
13 * 10 *
14 * If you want traces to be sent to some other 11 * If you want traces to be sent to some other place rather than ring
15 * buffer only, just need to register a new tr 12 * buffer only, just need to register a new trace_export and implement
16 * its own .write() function for writing trace 13 * its own .write() function for writing traces to the storage.
17 * 14 *
18 * next - pointer to the next trace_ex 15 * next - pointer to the next trace_export
19 * write - copy traces which have been 16 * write - copy traces which have been delt with ->commit() to
20 * the destination 17 * the destination
21 * flags - which ftrace to be exported <<
22 */ 18 */
23 struct trace_export { 19 struct trace_export {
24 struct trace_export __rcu *next; 20 struct trace_export __rcu *next;
25 void (*write)(struct trace_export *, c 21 void (*write)(struct trace_export *, const void *, unsigned int);
26 int flags; <<
27 }; 22 };
28 23
29 struct trace_array; <<
30 <<
31 #ifdef CONFIG_TRACING <<
32 <<
33 int register_ftrace_export(struct trace_export 24 int register_ftrace_export(struct trace_export *export);
34 int unregister_ftrace_export(struct trace_expo 25 int unregister_ftrace_export(struct trace_export *export);
35 26
36 /** <<
37 * trace_array_puts - write a constant string <<
38 * @tr: The trace array to write to <<
39 * @str: The constant string to write <<
40 */ <<
41 #define trace_array_puts(tr, str) <<
42 ({ <<
43 str ? __trace_array_puts(tr, _ <<
44 }) <<
45 int __trace_array_puts(struct trace_array *tr, <<
46 const char *str, int si <<
47 <<
48 void trace_printk_init_buffers(void); <<
49 __printf(3, 4) <<
50 int trace_array_printk(struct trace_array *tr, <<
51 const char *fmt, ...); <<
52 int trace_array_init_printk(struct trace_array <<
53 void trace_array_put(struct trace_array *tr); <<
54 struct trace_array *trace_array_get_by_name(co <<
55 int trace_array_destroy(struct trace_array *tr <<
56 <<
57 /* For osnoise tracer */ <<
58 int osnoise_arch_register(void); <<
59 void osnoise_arch_unregister(void); <<
60 void osnoise_trace_irq_entry(int id); <<
61 void osnoise_trace_irq_exit(int id, const char <<
62 <<
63 #else /* CONFIG_TRACING */ <<
64 static inline int register_ftrace_export(struc <<
65 { <<
66 return -EINVAL; <<
67 } <<
68 static inline int unregister_ftrace_export(str <<
69 { <<
70 return 0; <<
71 } <<
72 static inline void trace_printk_init_buffers(v <<
73 { <<
74 } <<
75 static inline int trace_array_printk(struct tr <<
76 const cha <<
77 { <<
78 return 0; <<
79 } <<
80 static inline int trace_array_init_printk(stru <<
81 { <<
82 return -EINVAL; <<
83 } <<
84 static inline void trace_array_put(struct trac <<
85 { <<
86 } <<
87 static inline struct trace_array *trace_array_ <<
88 { <<
89 return NULL; <<
90 } <<
91 static inline int trace_array_destroy(struct t <<
92 { <<
93 return 0; <<
94 } <<
95 #endif /* CONFIG_TRACING */ 27 #endif /* CONFIG_TRACING */
96 28
97 #endif /* _LINUX_TRACE_H */ 29 #endif /* _LINUX_TRACE_H */
98 30
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