1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3  * Because linux/module.h has tracepoints in the header, and ftrace.h
4  * used to include this file, define_trace.h includes linux/module.h
5  * But we do not want the module.h to override the TRACE_SYSTEM macro
6  * variable that define_trace.h is processing, so we only set it
7  * when module events are being processed, which would happen when
8  * CREATE_TRACE_POINTS is defined.
9  */
10 #ifdef CREATE_TRACE_POINTS
11 #undef TRACE_SYSTEM
12 #define TRACE_SYSTEM module
13 #endif
14 
15 #if !defined(_TRACE_MODULE_H) || defined(TRACE_HEADER_MULTI_READ)
16 #define _TRACE_MODULE_H
17 
18 #include <linux/tracepoint.h>
19 
20 #ifdef CONFIG_MODULES
21 
22 struct module;
23 
24 #define show_module_flags(flags) __print_flags(flags, "",	\
25 	{ (1UL << TAINT_PROPRIETARY_MODULE),	"P" },		\
26 	{ (1UL << TAINT_OOT_MODULE),		"O" },		\
27 	{ (1UL << TAINT_FORCED_MODULE),		"F" },		\
28 	{ (1UL << TAINT_CRAP),			"C" },		\
29 	{ (1UL << TAINT_UNSIGNED_MODULE),	"E" })
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(
43 		__entry->taints = mod->taints;
44 		__assign_str(name, mod->name);
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(
61 		__assign_str(name, mod->name);
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(
83 		__entry->ip	= ip;
84 		__entry->refcnt	= atomic_read(&mod->refcnt);
85 		__assign_str(name, mod->name);
86 	),
87 
88 	TP_printk("%s call_site=%ps 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(
120 		__entry->ip	= ip;
121 		__entry->wait	= wait;
122 		__assign_str(name, name);
123 	),
124 
125 	TP_printk("%s wait=%d call_site=%ps",
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 <trace/define_trace.h>
135