LXR linux/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
  21struct 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),       "X" })
  29
  30TRACE_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
  49TRACE_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
  69DECLARE_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 = __this_cpu_read(mod->refptr->incs) - __this_cpu_read(mod->refptr->decs);
  84                __assign_str(name, mod->name);
  85        ),
  86
  87        TP_printk("%s call_site=%pf refcnt=%d",
  88                  __get_str(name), (void *)__entry->ip, __entry->refcnt)
  89);
  90
  91DEFINE_EVENT(module_refcnt, module_get,
  92
  93        TP_PROTO(struct module *mod, unsigned long ip),
  94
  95        TP_ARGS(mod, ip)
  96);
  97
  98DEFINE_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
 106TRACE_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=%pf",
 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>
 134