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);
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);
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);
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);
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