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
  22 struct 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
  31 TRACE_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
  50 TRACE_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
  70 DECLARE_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
  92 DEFINE_EVENT(module_refcnt, module_get,
  93
  94         TP_PROTO(struct module *mod, unsigned long ip),
  95
  96         TP_ARGS(mod, ip)
  97 );
  98
  99 DEFINE_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
 107 TRACE_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>