135 lines · c
1/* SPDX-License-Identifier: GPL-2.0 */2/*3 * Because linux/module.h has tracepoints in the header, and ftrace.h4 * used to include this file, define_trace.h includes linux/module.h5 * But we do not want the module.h to override the TRACE_SYSTEM macro6 * variable that define_trace.h is processing, so we only set it7 * when module events are being processed, which would happen when8 * CREATE_TRACE_POINTS is defined.9 */10#ifdef CREATE_TRACE_POINTS11#undef TRACE_SYSTEM12#define TRACE_SYSTEM module13#endif14 15#if !defined(_TRACE_MODULE_H) || defined(TRACE_HEADER_MULTI_READ)16#define _TRACE_MODULE_H17 18#include <linux/tracepoint.h>19 20#ifdef CONFIG_MODULES21 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);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);62 ),63 64 TP_printk("%s", __get_str(name))65);66 67#ifdef CONFIG_MODULE_UNLOAD68/* 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);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);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