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