LXR linux/include/trace/events/module.h

   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, mod->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, mod->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, mod->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, 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