include/trace/events/module.h

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