1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3  * Trace files that want to automate creation of all tracepoints defined
4  * in their file should include this file. The following are macros that the
5  * trace file may define:
6  *
7  * TRACE_SYSTEM defines the system the tracepoint is for
8  *
9  * TRACE_INCLUDE_FILE if the file name is something other than TRACE_SYSTEM.h
10  *     This macro may be defined to tell define_trace.h what file to include.
11  *     Note, leave off the ".h".
12  *
13  * TRACE_INCLUDE_PATH if the path is something other than core kernel include/trace
14  *     then this macro can define the path to use. Note, the path is relative to
15  *     define_trace.h, not the file including it. Full path names for out of tree
16  *     modules must be used.
17  */
18 
19 #ifdef CREATE_TRACE_POINTS
20 
21 /* Prevent recursion */
22 #undef CREATE_TRACE_POINTS
23 
24 #include <linux/stringify.h>
25 
26 #undef TRACE_EVENT
27 #define TRACE_EVENT(name, proto, args, tstruct, assign, print)	\
28 	DEFINE_TRACE(name, PARAMS(proto), PARAMS(args))
29 
30 #undef TRACE_EVENT_CONDITION
31 #define TRACE_EVENT_CONDITION(name, proto, args, cond, tstruct, assign, print) \
32 	TRACE_EVENT(name,						\
33 		PARAMS(proto),						\
34 		PARAMS(args),						\
35 		PARAMS(tstruct),					\
36 		PARAMS(assign),						\
37 		PARAMS(print))
38 
39 #undef TRACE_EVENT_FN
40 #define TRACE_EVENT_FN(name, proto, args, tstruct,		\
41 		assign, print, reg, unreg)			\
42 	DEFINE_TRACE_FN(name, reg, unreg, PARAMS(proto), PARAMS(args))
43 
44 #undef TRACE_EVENT_FN_COND
45 #define TRACE_EVENT_FN_COND(name, proto, args, cond, tstruct,		\
46 		assign, print, reg, unreg)			\
47 	DEFINE_TRACE_FN(name, reg, unreg, PARAMS(proto), PARAMS(args))
48 
49 #undef TRACE_EVENT_NOP
50 #define TRACE_EVENT_NOP(name, proto, args, struct, assign, print)
51 
52 #undef DEFINE_EVENT_NOP
53 #define DEFINE_EVENT_NOP(template, name, proto, args)
54 
55 #undef DEFINE_EVENT
56 #define DEFINE_EVENT(template, name, proto, args) \
57 	DEFINE_TRACE(name, PARAMS(proto), PARAMS(args))
58 
59 #undef DEFINE_EVENT_FN
60 #define DEFINE_EVENT_FN(template, name, proto, args, reg, unreg) \
61 	DEFINE_TRACE_FN(name, reg, unreg, PARAMS(proto), PARAMS(args))
62 
63 #undef DEFINE_EVENT_PRINT
64 #define DEFINE_EVENT_PRINT(template, name, proto, args, print)	\
65 	DEFINE_TRACE(name, PARAMS(proto), PARAMS(args))
66 
67 #undef DEFINE_EVENT_CONDITION
68 #define DEFINE_EVENT_CONDITION(template, name, proto, args, cond) \
69 	DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
70 
71 #undef DECLARE_TRACE
72 #define DECLARE_TRACE(name, proto, args)	\
73 	DEFINE_TRACE(name, PARAMS(proto), PARAMS(args))
74 
75 #undef TRACE_INCLUDE
76 #undef __TRACE_INCLUDE
77 
78 #ifndef TRACE_INCLUDE_FILE
79 # define TRACE_INCLUDE_FILE TRACE_SYSTEM
80 # define UNDEF_TRACE_INCLUDE_FILE
81 #endif
82 
83 #ifndef TRACE_INCLUDE_PATH
84 # define __TRACE_INCLUDE(system) <trace/events/system.h>
85 # define UNDEF_TRACE_INCLUDE_PATH
86 #else
87 # define __TRACE_INCLUDE(system) __stringify(TRACE_INCLUDE_PATH/system.h)
88 #endif
89 
90 # define TRACE_INCLUDE(system) __TRACE_INCLUDE(system)
91 
92 /* Let the trace headers be reread */
93 #define TRACE_HEADER_MULTI_READ
94 
95 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
96 
97 /* Make all open coded DECLARE_TRACE nops */
98 #undef DECLARE_TRACE
99 #define DECLARE_TRACE(name, proto, args)
100 
101 #ifdef TRACEPOINTS_ENABLED
102 #include <trace/trace_events.h>
103 #include <trace/perf.h>
104 #include <trace/bpf_probe.h>
105 #endif
106 
107 #undef TRACE_EVENT
108 #undef TRACE_EVENT_FN
109 #undef TRACE_EVENT_FN_COND
110 #undef TRACE_EVENT_CONDITION
111 #undef TRACE_EVENT_NOP
112 #undef DEFINE_EVENT_NOP
113 #undef DECLARE_EVENT_CLASS
114 #undef DEFINE_EVENT
115 #undef DEFINE_EVENT_FN
116 #undef DEFINE_EVENT_PRINT
117 #undef DEFINE_EVENT_CONDITION
118 #undef TRACE_HEADER_MULTI_READ
119 #undef DECLARE_TRACE
120 
121 /* Only undef what we defined in this file */
122 #ifdef UNDEF_TRACE_INCLUDE_FILE
123 # undef TRACE_INCLUDE_FILE
124 # undef UNDEF_TRACE_INCLUDE_FILE
125 #endif
126 
127 #ifdef UNDEF_TRACE_INCLUDE_PATH
128 # undef TRACE_INCLUDE_PATH
129 # undef UNDEF_TRACE_INCLUDE_PATH
130 #endif
131 
132 /* We may be processing more files */
133 #define CREATE_TRACE_POINTS
134 
135 #endif /* CREATE_TRACE_POINTS */
136