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
22struct 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
31TRACE_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
50TRACE_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
70DECLARE_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
92DEFINE_EVENT(module_refcnt, module_get,
93
94	TP_PROTO(struct module *mod, unsigned long ip),
95
96	TP_ARGS(mod, ip)
97);
98
99DEFINE_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
107TRACE_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