1/*
2 * Because linux/module.h has tracepoints in the header, and ftrace.h
3 * used to include 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
21struct module;
22
23#define show_module_flags(flags) __print_flags(flags, "",	\
24	{ (1UL << TAINT_PROPRIETARY_MODULE),	"P" },		\
25	{ (1UL << TAINT_OOT_MODULE),		"O" },		\
26	{ (1UL << TAINT_FORCED_MODULE),		"F" },		\
27	{ (1UL << TAINT_CRAP),			"C" },		\
28	{ (1UL << TAINT_UNSIGNED_MODULE),	"E" })
29
30TRACE_EVENT(module_load,
31
32	TP_PROTO(struct module *mod),
33
34	TP_ARGS(mod),
35
36	TP_STRUCT__entry(
37		__field(	unsigned int,	taints		)
38		__string(	name,		mod->name	)
39	),
40
41	TP_fast_assign(
42		__entry->taints = mod->taints;
43		__assign_str(name, mod->name);
44	),
45
46	TP_printk("%s %s", __get_str(name), show_module_flags(__entry->taints))
47);
48
49TRACE_EVENT(module_free,
50
51	TP_PROTO(struct module *mod),
52
53	TP_ARGS(mod),
54
55	TP_STRUCT__entry(
56		__string(	name,		mod->name	)
57	),
58
59	TP_fast_assign(
60		__assign_str(name, mod->name);
61	),
62
63	TP_printk("%s", __get_str(name))
64);
65
66#ifdef CONFIG_MODULE_UNLOAD
67/* trace_module_get/put are only used if CONFIG_MODULE_UNLOAD is defined */
68
69DECLARE_EVENT_CLASS(module_refcnt,
70
71	TP_PROTO(struct module *mod, unsigned long ip),
72
73	TP_ARGS(mod, ip),
74
75	TP_STRUCT__entry(
76		__field(	unsigned long,	ip		)
77		__field(	int,		refcnt		)
78		__string(	name,		mod->name	)
79	),
80
81	TP_fast_assign(
82		__entry->ip	= ip;
83		__entry->refcnt	= atomic_read(&mod->refcnt);
84		__assign_str(name, mod->name);
85	),
86
87	TP_printk("%s call_site=%ps refcnt=%d",
88		  __get_str(name), (void *)__entry->ip, __entry->refcnt)
89);
90
91DEFINE_EVENT(module_refcnt, module_get,
92
93	TP_PROTO(struct module *mod, unsigned long ip),
94
95	TP_ARGS(mod, ip)
96);
97
98DEFINE_EVENT(module_refcnt, module_put,
99
100	TP_PROTO(struct module *mod, unsigned long ip),
101
102	TP_ARGS(mod, ip)
103);
104#endif /* CONFIG_MODULE_UNLOAD */
105
106TRACE_EVENT(module_request,
107
108	TP_PROTO(char *name, bool wait, unsigned long ip),
109
110	TP_ARGS(name, wait, ip),
111
112	TP_STRUCT__entry(
113		__field(	unsigned long,	ip		)
114		__field(	bool,		wait		)
115		__string(	name,		name		)
116	),
117
118	TP_fast_assign(
119		__entry->ip	= ip;
120		__entry->wait	= wait;
121		__assign_str(name, name);
122	),
123
124	TP_printk("%s wait=%d call_site=%ps",
125		  __get_str(name), (int)__entry->wait, (void *)__entry->ip)
126);
127
128#endif /* CONFIG_MODULES */
129
130#endif /* _TRACE_MODULE_H */
131
132/* This part must be outside protection */
133#include <trace/define_trace.h>
134