include/instrumentation/events/module.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * Because linux/module.h has tracepoints in the header, and ftrace.h
   4  * eventually includes 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(LTTNG_TRACE_MODULE_H) || defined(TRACE_HEADER_MULTI_READ)
  16 #define LTTNG_TRACE_MODULE_H
  17
  18 #include <lttng/tracepoint-event.h>
  19 #include <linux/version.h>
  20 #include <linux/kernel.h>
  21
  22 #ifdef CONFIG_MODULES
  23
  24 #ifndef _TRACE_MODULE_DEF
  25 #define _TRACE_MODULE_DEF
  26 struct module;
  27
  28 #endif
  29
  30 LTTNG_TRACEPOINT_ENUM(taint,
  31         TP_ENUM_VALUES(
  32                 ctf_enum_value("PROPRIETARY_MODULE", 1UL << TAINT_PROPRIETARY_MODULE)
  33                 ctf_enum_value("FORCED_MODULE", 1UL << TAINT_FORCED_MODULE)
  34 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,15,0))
  35                 ctf_enum_value("CPU_OUT_OF_SPEC", 1UL << TAINT_CPU_OUT_OF_SPEC)
  36 #else
  37                 ctf_enum_value("UNSAFE_SMP", 1UL << TAINT_UNSAFE_SMP)
  38 #endif
  39                 ctf_enum_value("FORCED_RMMOD", 1UL << TAINT_FORCED_RMMOD)
  40                 ctf_enum_value("MACHINE_CHECK", 1UL << TAINT_MACHINE_CHECK)
  41                 ctf_enum_value("BAD_PAGE", 1UL << TAINT_BAD_PAGE)
  42                 ctf_enum_value("USER", 1UL << TAINT_USER)
  43                 ctf_enum_value("DIE", 1UL << TAINT_DIE)
  44                 ctf_enum_value("OVERRIDDEN_ACPI_TABLE", 1UL << TAINT_OVERRIDDEN_ACPI_TABLE)
  45                 ctf_enum_value("WARN", 1UL << TAINT_WARN)
  46                 ctf_enum_value("CRAP", 1UL << TAINT_CRAP)
  47                 ctf_enum_value("FIRMWARE_WORKAROUND", 1UL << TAINT_FIRMWARE_WORKAROUND)
  48 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,2,0))
  49                 ctf_enum_value("OOT_MODULE", 1UL << TAINT_OOT_MODULE)
  50 #endif
  51 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,15,0))
  52                 ctf_enum_value("UNSIGNED_MODULE", 1UL << TAINT_UNSIGNED_MODULE)
  53 #endif
  54 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,17,0))
  55                 ctf_enum_value("SOFTLOCKUP", 1UL << TAINT_SOFTLOCKUP)
  56 #endif
  57 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,0,0))
  58                 ctf_enum_value("LIVEPATCH", 1UL << TAINT_LIVEPATCH)
  59 #endif
  60 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,15,0))
  61                 ctf_enum_value("AUX", 1UL << TAINT_AUX)
  62 #endif
  63 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,17,0))
  64                 ctf_enum_value("RANDSTRUCT", 1UL << TAINT_RANDSTRUCT)
  65 #endif
  66         )
  67 )
  68
  69 LTTNG_TRACEPOINT_EVENT(module_load,
  70
  71         TP_PROTO(struct module *mod),
  72
  73         TP_ARGS(mod),
  74
  75         TP_FIELDS(
  76                 ctf_enum(taint, unsigned int, taints, mod->taints)
  77                 ctf_string(name, mod->name)
  78         )
  79 )
  80
  81 LTTNG_TRACEPOINT_EVENT(module_free,
  82
  83         TP_PROTO(struct module *mod),
  84
  85         TP_ARGS(mod),
  86
  87         TP_FIELDS(
  88                 ctf_string(name, mod->name)
  89         )
  90 )
  91
  92 #ifdef CONFIG_MODULE_UNLOAD
  93 /* trace_module_get/put are only used if CONFIG_MODULE_UNLOAD is defined */
  94
  95 LTTNG_TRACEPOINT_EVENT_CLASS(module_refcnt,
  96
  97         TP_PROTO(struct module *mod, unsigned long ip),
  98
  99         TP_ARGS(mod, ip),
 100
 101         TP_FIELDS(
 102                 ctf_integer_hex(unsigned long, ip, ip)
 103 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,19,0))
 104                 ctf_integer(int, refcnt, atomic_read(&mod->refcnt))
 105 #else
 106                 ctf_integer(int, refcnt, __this_cpu_read(mod->refptr->incs) + __this_cpu_read(mod->refptr->decs))
 107 #endif
 108                 ctf_string(name, mod->name)
 109         )
 110 )
 111
 112 LTTNG_TRACEPOINT_EVENT_INSTANCE(module_refcnt, module_get,
 113
 114         TP_PROTO(struct module *mod, unsigned long ip),
 115
 116         TP_ARGS(mod, ip)
 117 )
 118
 119 LTTNG_TRACEPOINT_EVENT_INSTANCE(module_refcnt, module_put,
 120
 121         TP_PROTO(struct module *mod, unsigned long ip),
 122
 123         TP_ARGS(mod, ip)
 124 )
 125 #endif /* CONFIG_MODULE_UNLOAD */
 126
 127 LTTNG_TRACEPOINT_EVENT(module_request,
 128
 129         TP_PROTO(char *name, bool wait, unsigned long ip),
 130
 131         TP_ARGS(name, wait, ip),
 132
 133         TP_FIELDS(
 134                 ctf_integer_hex(unsigned long, ip, ip)
 135                 ctf_integer(bool, wait, wait)
 136                 ctf_string(name, name)
 137         )
 138 )
 139
 140 #endif /* CONFIG_MODULES */
 141
 142 #endif /* LTTNG_TRACE_MODULE_H */
 143
 144 /* This part must be outside protection */
 145 #include <lttng/define_trace.h>