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; 29 struct trace_array;
30 30
31 #ifdef CONFIG_TRACING 31 #ifdef CONFIG_TRACING
32 32
33 int register_ftrace_export(struct trace_export 33 int register_ftrace_export(struct trace_export *export);
34 int unregister_ftrace_export(struct trace_expo 34 int unregister_ftrace_export(struct trace_export *export);
35 35
36 /** 36 /**
37 * trace_array_puts - write a constant string 37 * trace_array_puts - write a constant string into the trace buffer.
38 * @tr: The trace array to write to 38 * @tr: The trace array to write to
39 * @str: The constant string to write 39 * @str: The constant string to write
40 */ 40 */
41 #define trace_array_puts(tr, str) 41 #define trace_array_puts(tr, str) \
42 ({ 42 ({ \
43 str ? __trace_array_puts(tr, _ 43 str ? __trace_array_puts(tr, _THIS_IP_, str, strlen(str)) : -1; \
44 }) 44 })
45 int __trace_array_puts(struct trace_array *tr, 45 int __trace_array_puts(struct trace_array *tr, unsigned long ip,
46 const char *str, int si 46 const char *str, int size);
47 47
48 void trace_printk_init_buffers(void); 48 void trace_printk_init_buffers(void);
49 __printf(3, 4) 49 __printf(3, 4)
50 int trace_array_printk(struct trace_array *tr, 50 int trace_array_printk(struct trace_array *tr, unsigned long ip,
51 const char *fmt, ...); 51 const char *fmt, ...);
52 int trace_array_init_printk(struct trace_array 52 int trace_array_init_printk(struct trace_array *tr);
53 void trace_array_put(struct trace_array *tr); 53 void trace_array_put(struct trace_array *tr);
54 struct trace_array *trace_array_get_by_name(co 54 struct trace_array *trace_array_get_by_name(const char *name, const char *systems);
55 int trace_array_destroy(struct trace_array *tr 55 int trace_array_destroy(struct trace_array *tr);
56 56
57 /* For osnoise tracer */ 57 /* For osnoise tracer */
58 int osnoise_arch_register(void); 58 int osnoise_arch_register(void);
59 void osnoise_arch_unregister(void); 59 void osnoise_arch_unregister(void);
60 void osnoise_trace_irq_entry(int id); 60 void osnoise_trace_irq_entry(int id);
61 void osnoise_trace_irq_exit(int id, const char 61 void osnoise_trace_irq_exit(int id, const char *desc);
62 62
63 #else /* CONFIG_TRACING */ 63 #else /* CONFIG_TRACING */
64 static inline int register_ftrace_export(struc 64 static inline int register_ftrace_export(struct trace_export *export)
65 { 65 {
66 return -EINVAL; 66 return -EINVAL;
67 } 67 }
68 static inline int unregister_ftrace_export(str 68 static inline int unregister_ftrace_export(struct trace_export *export)
69 { 69 {
70 return 0; 70 return 0;
71 } 71 }
72 static inline void trace_printk_init_buffers(v 72 static inline void trace_printk_init_buffers(void)
73 { 73 {
74 } 74 }
75 static inline int trace_array_printk(struct tr 75 static inline int trace_array_printk(struct trace_array *tr, unsigned long ip,
76 const cha 76 const char *fmt, ...)
77 { 77 {
78 return 0; 78 return 0;
79 } 79 }
80 static inline int trace_array_init_printk(stru 80 static inline int trace_array_init_printk(struct trace_array *tr)
81 { 81 {
82 return -EINVAL; 82 return -EINVAL;
83 } 83 }
84 static inline void trace_array_put(struct trac 84 static inline void trace_array_put(struct trace_array *tr)
85 { 85 {
86 } 86 }
87 static inline struct trace_array *trace_array_ 87 static inline struct trace_array *trace_array_get_by_name(const char *name, const char *systems)
88 { 88 {
89 return NULL; 89 return NULL;
90 } 90 }
91 static inline int trace_array_destroy(struct t 91 static inline int trace_array_destroy(struct trace_array *tr)
92 { 92 {
93 return 0; 93 return 0;
94 } 94 }
95 #endif /* CONFIG_TRACING */ 95 #endif /* CONFIG_TRACING */
96 96
97 #endif /* _LINUX_TRACE_H */ 97 #endif /* _LINUX_TRACE_H */
98 98
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