diff options
Diffstat (limited to 'include/linux/marker.h')
-rw-r--r-- | include/linux/marker.h | 68 |
1 files changed, 39 insertions, 29 deletions
diff --git a/include/linux/marker.h b/include/linux/marker.h index 5f36cf946bcb..5df879dc3776 100644 --- a/include/linux/marker.h +++ b/include/linux/marker.h | |||
@@ -19,16 +19,23 @@ struct marker; | |||
19 | 19 | ||
20 | /** | 20 | /** |
21 | * marker_probe_func - Type of a marker probe function | 21 | * marker_probe_func - Type of a marker probe function |
22 | * @mdata: pointer of type struct marker | 22 | * @probe_private: probe private data |
23 | * @private_data: caller site private data | 23 | * @call_private: call site private data |
24 | * @fmt: format string | 24 | * @fmt: format string |
25 | * @...: variable argument list | 25 | * @args: variable argument list pointer. Use a pointer to overcome C's |
26 | * inability to pass this around as a pointer in a portable manner in | ||
27 | * the callee otherwise. | ||
26 | * | 28 | * |
27 | * Type of marker probe functions. They receive the mdata and need to parse the | 29 | * Type of marker probe functions. They receive the mdata and need to parse the |
28 | * format string to recover the variable argument list. | 30 | * format string to recover the variable argument list. |
29 | */ | 31 | */ |
30 | typedef void marker_probe_func(const struct marker *mdata, | 32 | typedef void marker_probe_func(void *probe_private, void *call_private, |
31 | void *private_data, const char *fmt, ...); | 33 | const char *fmt, va_list *args); |
34 | |||
35 | struct marker_probe_closure { | ||
36 | marker_probe_func *func; /* Callback */ | ||
37 | void *probe_private; /* Private probe data */ | ||
38 | }; | ||
32 | 39 | ||
33 | struct marker { | 40 | struct marker { |
34 | const char *name; /* Marker name */ | 41 | const char *name; /* Marker name */ |
@@ -36,8 +43,11 @@ struct marker { | |||
36 | * variable argument list. | 43 | * variable argument list. |
37 | */ | 44 | */ |
38 | char state; /* Marker state. */ | 45 | char state; /* Marker state. */ |
39 | marker_probe_func *call;/* Probe handler function pointer */ | 46 | char ptype; /* probe type : 0 : single, 1 : multi */ |
40 | void *private; /* Private probe data */ | 47 | void (*call)(const struct marker *mdata, /* Probe wrapper */ |
48 | void *call_private, const char *fmt, ...); | ||
49 | struct marker_probe_closure single; | ||
50 | struct marker_probe_closure *multi; | ||
41 | } __attribute__((aligned(8))); | 51 | } __attribute__((aligned(8))); |
42 | 52 | ||
43 | #ifdef CONFIG_MARKERS | 53 | #ifdef CONFIG_MARKERS |
@@ -49,35 +59,31 @@ struct marker { | |||
49 | * not add unwanted padding between the beginning of the section and the | 59 | * not add unwanted padding between the beginning of the section and the |
50 | * structure. Force alignment to the same alignment as the section start. | 60 | * structure. Force alignment to the same alignment as the section start. |
51 | */ | 61 | */ |
52 | #define __trace_mark(name, call_data, format, args...) \ | 62 | #define __trace_mark(name, call_private, format, args...) \ |
53 | do { \ | 63 | do { \ |
54 | static const char __mstrtab_name_##name[] \ | 64 | static const char __mstrtab_##name[] \ |
55 | __attribute__((section("__markers_strings"))) \ | ||
56 | = #name; \ | ||
57 | static const char __mstrtab_format_##name[] \ | ||
58 | __attribute__((section("__markers_strings"))) \ | 65 | __attribute__((section("__markers_strings"))) \ |
59 | = format; \ | 66 | = #name "\0" format; \ |
60 | static struct marker __mark_##name \ | 67 | static struct marker __mark_##name \ |
61 | __attribute__((section("__markers"), aligned(8))) = \ | 68 | __attribute__((section("__markers"), aligned(8))) = \ |
62 | { __mstrtab_name_##name, __mstrtab_format_##name, \ | 69 | { __mstrtab_##name, &__mstrtab_##name[sizeof(#name)], \ |
63 | 0, __mark_empty_function, NULL }; \ | 70 | 0, 0, marker_probe_cb, \ |
71 | { __mark_empty_function, NULL}, NULL }; \ | ||
64 | __mark_check_format(format, ## args); \ | 72 | __mark_check_format(format, ## args); \ |
65 | if (unlikely(__mark_##name.state)) { \ | 73 | if (unlikely(__mark_##name.state)) { \ |
66 | preempt_disable(); \ | ||
67 | (*__mark_##name.call) \ | 74 | (*__mark_##name.call) \ |
68 | (&__mark_##name, call_data, \ | 75 | (&__mark_##name, call_private, \ |
69 | format, ## args); \ | 76 | format, ## args); \ |
70 | preempt_enable(); \ | ||
71 | } \ | 77 | } \ |
72 | } while (0) | 78 | } while (0) |
73 | 79 | ||
74 | extern void marker_update_probe_range(struct marker *begin, | 80 | extern void marker_update_probe_range(struct marker *begin, |
75 | struct marker *end, struct module *probe_module, int *refcount); | 81 | struct marker *end); |
76 | #else /* !CONFIG_MARKERS */ | 82 | #else /* !CONFIG_MARKERS */ |
77 | #define __trace_mark(name, call_data, format, args...) \ | 83 | #define __trace_mark(name, call_private, format, args...) \ |
78 | __mark_check_format(format, ## args) | 84 | __mark_check_format(format, ## args) |
79 | static inline void marker_update_probe_range(struct marker *begin, | 85 | static inline void marker_update_probe_range(struct marker *begin, |
80 | struct marker *end, struct module *probe_module, int *refcount) | 86 | struct marker *end) |
81 | { } | 87 | { } |
82 | #endif /* CONFIG_MARKERS */ | 88 | #endif /* CONFIG_MARKERS */ |
83 | 89 | ||
@@ -92,8 +98,6 @@ static inline void marker_update_probe_range(struct marker *begin, | |||
92 | #define trace_mark(name, format, args...) \ | 98 | #define trace_mark(name, format, args...) \ |
93 | __trace_mark(name, NULL, format, ## args) | 99 | __trace_mark(name, NULL, format, ## args) |
94 | 100 | ||
95 | #define MARK_MAX_FORMAT_LEN 1024 | ||
96 | |||
97 | /** | 101 | /** |
98 | * MARK_NOARGS - Format string for a marker with no argument. | 102 | * MARK_NOARGS - Format string for a marker with no argument. |
99 | */ | 103 | */ |
@@ -106,24 +110,30 @@ static inline void __printf(1, 2) __mark_check_format(const char *fmt, ...) | |||
106 | 110 | ||
107 | extern marker_probe_func __mark_empty_function; | 111 | extern marker_probe_func __mark_empty_function; |
108 | 112 | ||
113 | extern void marker_probe_cb(const struct marker *mdata, | ||
114 | void *call_private, const char *fmt, ...); | ||
115 | extern void marker_probe_cb_noarg(const struct marker *mdata, | ||
116 | void *call_private, const char *fmt, ...); | ||
117 | |||
109 | /* | 118 | /* |
110 | * Connect a probe to a marker. | 119 | * Connect a probe to a marker. |
111 | * private data pointer must be a valid allocated memory address, or NULL. | 120 | * private data pointer must be a valid allocated memory address, or NULL. |
112 | */ | 121 | */ |
113 | extern int marker_probe_register(const char *name, const char *format, | 122 | extern int marker_probe_register(const char *name, const char *format, |
114 | marker_probe_func *probe, void *private); | 123 | marker_probe_func *probe, void *probe_private); |
115 | 124 | ||
116 | /* | 125 | /* |
117 | * Returns the private data given to marker_probe_register. | 126 | * Returns the private data given to marker_probe_register. |
118 | */ | 127 | */ |
119 | extern void *marker_probe_unregister(const char *name); | 128 | extern int marker_probe_unregister(const char *name, |
129 | marker_probe_func *probe, void *probe_private); | ||
120 | /* | 130 | /* |
121 | * Unregister a marker by providing the registered private data. | 131 | * Unregister a marker by providing the registered private data. |
122 | */ | 132 | */ |
123 | extern void *marker_probe_unregister_private_data(void *private); | 133 | extern int marker_probe_unregister_private_data(marker_probe_func *probe, |
134 | void *probe_private); | ||
124 | 135 | ||
125 | extern int marker_arm(const char *name); | 136 | extern void *marker_get_private_data(const char *name, marker_probe_func *probe, |
126 | extern int marker_disarm(const char *name); | 137 | int num); |
127 | extern void *marker_get_private_data(const char *name); | ||
128 | 138 | ||
129 | #endif | 139 | #endif |