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b283666f PW |
1 | /* |
2 | * Because linux/module.h has tracepoints in the header, and ftrace.h | |
3 | * eventually includes this file, define_trace.h includes linux/module.h | |
4 | * But we do not want the module.h to override the TRACE_SYSTEM macro | |
5 | * variable that define_trace.h is processing, so we only set it | |
6 | * when module events are being processed, which would happen when | |
7 | * CREATE_TRACE_POINTS is defined. | |
8 | */ | |
9 | #ifdef CREATE_TRACE_POINTS | |
10 | #undef TRACE_SYSTEM | |
11 | #define TRACE_SYSTEM module | |
12 | #endif | |
13 | ||
14 | #if !defined(_TRACE_MODULE_H) || defined(TRACE_HEADER_MULTI_READ) | |
15 | #define _TRACE_MODULE_H | |
16 | ||
17 | #include <linux/tracepoint.h> | |
18 | ||
19 | #ifdef CONFIG_MODULES | |
20 | ||
21 | #ifndef _TRACE_MODULE_DEF | |
22 | #define _TRACE_MODULE_DEF | |
23 | struct module; | |
24 | ||
25 | #define show_module_flags(flags) __print_flags(flags, "", \ | |
26 | { (1UL << TAINT_PROPRIETARY_MODULE), "P" }, \ | |
27 | { (1UL << TAINT_FORCED_MODULE), "F" }, \ | |
28 | { (1UL << TAINT_CRAP), "C" }) | |
29 | #endif | |
30 | ||
31 | TRACE_EVENT(module_load, | |
32 | ||
33 | TP_PROTO(struct module *mod), | |
34 | ||
35 | TP_ARGS(mod), | |
36 | ||
37 | TP_STRUCT__entry( | |
38 | __field( unsigned int, taints ) | |
39 | __string( name, mod->name ) | |
40 | ), | |
41 | ||
42 | TP_fast_assign( | |
d3ac4d63 PW |
43 | tp_assign(taints, mod->taints) |
44 | tp_strcpy(name, mod->name) | |
b283666f PW |
45 | ), |
46 | ||
47 | TP_printk("%s %s", __get_str(name), show_module_flags(__entry->taints)) | |
48 | ) | |
49 | ||
50 | TRACE_EVENT(module_free, | |
51 | ||
52 | TP_PROTO(struct module *mod), | |
53 | ||
54 | TP_ARGS(mod), | |
55 | ||
56 | TP_STRUCT__entry( | |
57 | __string( name, mod->name ) | |
58 | ), | |
59 | ||
60 | TP_fast_assign( | |
d3ac4d63 | 61 | tp_strcpy(name, mod->name) |
b283666f PW |
62 | ), |
63 | ||
64 | TP_printk("%s", __get_str(name)) | |
65 | ) | |
66 | ||
67 | #ifdef CONFIG_MODULE_UNLOAD | |
68 | /* trace_module_get/put are only used if CONFIG_MODULE_UNLOAD is defined */ | |
69 | ||
70 | DECLARE_EVENT_CLASS(module_refcnt, | |
71 | ||
72 | TP_PROTO(struct module *mod, unsigned long ip), | |
73 | ||
74 | TP_ARGS(mod, ip), | |
75 | ||
76 | TP_STRUCT__entry( | |
77 | __field( unsigned long, ip ) | |
78 | __field( int, refcnt ) | |
79 | __string( name, mod->name ) | |
80 | ), | |
81 | ||
82 | TP_fast_assign( | |
d3ac4d63 PW |
83 | tp_assign(ip, ip) |
84 | tp_assign(refcnt, __this_cpu_read(mod->refptr->incs) + __this_cpu_read(mod->refptr->decs)) | |
85 | tp_strcpy(name, mod->name) | |
b283666f PW |
86 | ), |
87 | ||
88 | TP_printk("%s call_site=%pf refcnt=%d", | |
89 | __get_str(name), (void *)__entry->ip, __entry->refcnt) | |
90 | ) | |
91 | ||
92 | DEFINE_EVENT(module_refcnt, module_get, | |
93 | ||
94 | TP_PROTO(struct module *mod, unsigned long ip), | |
95 | ||
96 | TP_ARGS(mod, ip) | |
97 | ) | |
98 | ||
99 | DEFINE_EVENT(module_refcnt, module_put, | |
100 | ||
101 | TP_PROTO(struct module *mod, unsigned long ip), | |
102 | ||
103 | TP_ARGS(mod, ip) | |
104 | ) | |
105 | #endif /* CONFIG_MODULE_UNLOAD */ | |
106 | ||
107 | TRACE_EVENT(module_request, | |
108 | ||
109 | TP_PROTO(char *name, bool wait, unsigned long ip), | |
110 | ||
111 | TP_ARGS(name, wait, ip), | |
112 | ||
113 | TP_STRUCT__entry( | |
114 | __field( unsigned long, ip ) | |
115 | __field( bool, wait ) | |
116 | __string( name, name ) | |
117 | ), | |
118 | ||
119 | TP_fast_assign( | |
d3ac4d63 PW |
120 | tp_assign(ip, ip) |
121 | tp_assign(wait, wait) | |
122 | tp_strcpy(name, name) | |
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123 | ), |
124 | ||
125 | TP_printk("%s wait=%d call_site=%pf", | |
126 | __get_str(name), (int)__entry->wait, (void *)__entry->ip) | |
127 | ) | |
128 | ||
129 | #endif /* CONFIG_MODULES */ | |
130 | ||
131 | #endif /* _TRACE_MODULE_H */ | |
132 | ||
133 | /* This part must be outside protection */ | |
134 | #include "../../../probes/define_trace.h" |