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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
478409dd CZ |
2 | #ifndef _LINUX_TRACE_H |
3 | #define _LINUX_TRACE_H | |
4 | ||
8438f521 | 5 | #define TRACE_EXPORT_FUNCTION BIT(0) |
8ab7a2b7 | 6 | #define TRACE_EXPORT_EVENT BIT(1) |
458999c6 | 7 | #define TRACE_EXPORT_MARKER BIT(2) |
8438f521 | 8 | |
478409dd CZ |
9 | /* |
10 | * The trace export - an export of Ftrace output. The trace_export | |
11 | * can process traces and export them to a registered destination as | |
12 | * an addition to the current only output of Ftrace - i.e. ring buffer. | |
13 | * | |
14 | * If you want traces to be sent to some other place rather than ring | |
15 | * buffer only, just need to register a new trace_export and implement | |
16 | * its own .write() function for writing traces to the storage. | |
17 | * | |
18 | * next - pointer to the next trace_export | |
19 | * write - copy traces which have been delt with ->commit() to | |
20 | * the destination | |
8438f521 | 21 | * flags - which ftrace to be exported |
478409dd CZ |
22 | */ |
23 | struct trace_export { | |
24 | struct trace_export __rcu *next; | |
a773d419 | 25 | void (*write)(struct trace_export *, const void *, unsigned int); |
8438f521 | 26 | int flags; |
478409dd CZ |
27 | }; |
28 | ||
bedf0683 AS |
29 | struct trace_array; |
30 | ||
1a77dd1c AE |
31 | #ifdef CONFIG_TRACING |
32 | ||
478409dd CZ |
33 | int register_ftrace_export(struct trace_export *export); |
34 | int unregister_ftrace_export(struct trace_export *export); | |
35 | ||
d503b8f7 SRG |
36 | /** |
37 | * trace_array_puts - write a constant string into the trace buffer. | |
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, _THIS_IP_, str, strlen(str)) : -1; \ | |
44 | }) | |
45 | int __trace_array_puts(struct trace_array *tr, unsigned long ip, | |
46 | const char *str, int size); | |
47 | ||
2d6425af | 48 | void trace_printk_init_buffers(void); |
bd0c9706 | 49 | __printf(3, 4) |
2d6425af | 50 | int trace_array_printk(struct trace_array *tr, unsigned long ip, |
bd0c9706 | 51 | const char *fmt, ...); |
38ce2a9e | 52 | int trace_array_init_printk(struct trace_array *tr); |
28879787 DI |
53 | void trace_array_put(struct trace_array *tr); |
54 | struct trace_array *trace_array_get_by_name(const char *name); | |
2d6425af | 55 | int trace_array_destroy(struct trace_array *tr); |
bce29ac9 DBO |
56 | |
57 | /* For osnoise tracer */ | |
58 | int osnoise_arch_register(void); | |
59 | void osnoise_arch_unregister(void); | |
f7d9f637 DBO |
60 | void osnoise_trace_irq_entry(int id); |
61 | void osnoise_trace_irq_exit(int id, const char *desc); | |
bce29ac9 | 62 | |
1a77dd1c AE |
63 | #else /* CONFIG_TRACING */ |
64 | static inline int register_ftrace_export(struct trace_export *export) | |
65 | { | |
66 | return -EINVAL; | |
67 | } | |
68 | static inline int unregister_ftrace_export(struct trace_export *export) | |
69 | { | |
70 | return 0; | |
71 | } | |
72 | static inline void trace_printk_init_buffers(void) | |
73 | { | |
74 | } | |
75 | static inline int trace_array_printk(struct trace_array *tr, unsigned long ip, | |
76 | const char *fmt, ...) | |
77 | { | |
78 | return 0; | |
79 | } | |
80 | static inline int trace_array_init_printk(struct trace_array *tr) | |
81 | { | |
82 | return -EINVAL; | |
83 | } | |
84 | static inline void trace_array_put(struct trace_array *tr) | |
85 | { | |
86 | } | |
87 | static inline struct trace_array *trace_array_get_by_name(const char *name) | |
88 | { | |
89 | return NULL; | |
90 | } | |
91 | static inline int trace_array_destroy(struct trace_array *tr) | |
92 | { | |
93 | return 0; | |
94 | } | |
478409dd CZ |
95 | #endif /* CONFIG_TRACING */ |
96 | ||
97 | #endif /* _LINUX_TRACE_H */ |