include/trace/events/module.h

   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
  21 struct 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
  30 TRACE_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
  49 TRACE_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
  69 DECLARE_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
  91 DEFINE_EVENT(module_refcnt, module_get,
  92
  93         TP_PROTO(struct module *mod, unsigned long ip),
  94
  95         TP_ARGS(mod, ip)
  96 );
  97
  98 DEFINE_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
 106 TRACE_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>