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tracepoint: Support iterating over tracepoints on modules

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Add for_each_module_tracepoint() for iterating over tracepoints
on modules. This is similar to the for_each_kernel_tracepoint()
but only for the tracepoints on modules (not including kernel
built-in tracepoints).

Link: https://lore.kernel.org/all/172397777800.286558.14554748203446214056.stgit@devnote2/

Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
This commit is contained in:
Masami Hiramatsu (Google) 2024-08-18 19:42:58 +09:00
parent ce4db753de
commit d5dbf8b48a
2 changed files with 28 additions and 0 deletions
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7
include/linux/tracepoint.h
View File

@ -64,6 +64,8 @@ struct tp_module {
bool trace_module_has_bad_taint(struct module *mod); bool trace_module_has_bad_taint(struct module *mod);
extern int register_tracepoint_module_notifier(struct notifier_block *nb); extern int register_tracepoint_module_notifier(struct notifier_block *nb);
extern int unregister_tracepoint_module_notifier(struct notifier_block *nb); extern int unregister_tracepoint_module_notifier(struct notifier_block *nb);
void for_each_module_tracepoint(void (*fct)(struct tracepoint *, void *),
void *priv);
#else #else
static inline bool trace_module_has_bad_taint(struct module *mod) static inline bool trace_module_has_bad_taint(struct module *mod)
{ {
@ -79,6 +81,11 @@ int unregister_tracepoint_module_notifier(struct notifier_block *nb)
{ {
return 0; return 0;
} }
static inline
void for_each_module_tracepoint(void (*fct)(struct tracepoint *, void *),
void *priv)
{
}
#endif /* CONFIG_MODULES */ #endif /* CONFIG_MODULES */
/* /*

21
kernel/tracepoint.c
View File

@ -735,6 +735,27 @@ static __init int init_tracepoints(void)
return ret; return ret;
} }
__initcall(init_tracepoints); __initcall(init_tracepoints);
/**
* for_each_module_tracepoint - iteration on all tracepoints in all modules
* @fct: callback
* @priv: private data
*/
void for_each_module_tracepoint(void (*fct)(struct tracepoint *tp, void *priv),
void *priv)
{
struct tp_module *tp_mod;
struct module *mod;
mutex_lock(&tracepoint_module_list_mutex);
list_for_each_entry(tp_mod, &tracepoint_module_list, list) {
mod = tp_mod->mod;
for_each_tracepoint_range(mod->tracepoints_ptrs,
mod->tracepoints_ptrs + mod->num_tracepoints,
fct, priv);
}
mutex_unlock(&tracepoint_module_list_mutex);
}
#endif /* CONFIG_MODULES */ #endif /* CONFIG_MODULES */
/** /**