diff options
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/ftrace.h | 27 | ||||
| -rw-r--r-- | include/linux/ftrace_event.h | 28 | ||||
| -rw-r--r-- | include/linux/module.h | 2 | ||||
| -rw-r--r-- | include/linux/tracepoint.h | 18 |
4 files changed, 48 insertions, 27 deletions
diff --git a/include/linux/ftrace.h b/include/linux/ftrace.h index f4233b195da..9212b017bc7 100644 --- a/include/linux/ftrace.h +++ b/include/linux/ftrace.h @@ -92,6 +92,7 @@ typedef void (*ftrace_func_t)(unsigned long ip, unsigned long parent_ip, * STUB - The ftrace_ops is just a place holder. * INITIALIZED - The ftrace_ops has already been initialized (first use time * register_ftrace_function() is called, it will initialized the ops) + * DELETED - The ops are being deleted, do not let them be registered again. */ enum { FTRACE_OPS_FL_ENABLED = 1 << 0, @@ -103,13 +104,26 @@ enum { FTRACE_OPS_FL_RECURSION_SAFE = 1 << 6, FTRACE_OPS_FL_STUB = 1 << 7, FTRACE_OPS_FL_INITIALIZED = 1 << 8, + FTRACE_OPS_FL_DELETED = 1 << 9, }; +/* + * Note, ftrace_ops can be referenced outside of RCU protection. + * (Although, for perf, the control ops prevent that). If ftrace_ops is + * allocated and not part of kernel core data, the unregistering of it will + * perform a scheduling on all CPUs to make sure that there are no more users. + * Depending on the load of the system that may take a bit of time. + * + * Any private data added must also take care not to be freed and if private + * data is added to a ftrace_ops that is in core code, the user of the + * ftrace_ops must perform a schedule_on_each_cpu() before freeing it. + */ struct ftrace_ops { ftrace_func_t func; struct ftrace_ops *next; unsigned long flags; int __percpu *disabled; + void *private; #ifdef CONFIG_DYNAMIC_FTRACE struct ftrace_hash *notrace_hash; struct ftrace_hash *filter_hash; @@ -285,7 +299,7 @@ extern void unregister_ftrace_function_probe_func(char *glob, struct ftrace_probe_ops *ops); extern void unregister_ftrace_function_probe_all(char *glob); -extern int ftrace_text_reserved(void *start, void *end); +extern int ftrace_text_reserved(const void *start, const void *end); extern int ftrace_nr_registered_ops(void); @@ -316,12 +330,9 @@ enum { #define FTRACE_REF_MAX ((1UL << 29) - 1) struct dyn_ftrace { - union { - unsigned long ip; /* address of mcount call-site */ - struct dyn_ftrace *freelist; - }; + unsigned long ip; /* address of mcount call-site */ unsigned long flags; - struct dyn_arch_ftrace arch; + struct dyn_arch_ftrace arch; }; int ftrace_force_update(void); @@ -409,7 +420,7 @@ ftrace_set_early_filter(struct ftrace_ops *ops, char *buf, int enable); /* defined in arch */ extern int ftrace_ip_converted(unsigned long ip); -extern int ftrace_dyn_arch_init(void *data); +extern int ftrace_dyn_arch_init(void); extern void ftrace_replace_code(int enable); extern int ftrace_update_ftrace_func(ftrace_func_t func); extern void ftrace_caller(void); @@ -541,7 +552,7 @@ static inline __init int unregister_ftrace_command(char *cmd_name) { return -EINVAL; } -static inline int ftrace_text_reserved(void *start, void *end) +static inline int ftrace_text_reserved(const void *start, const void *end) { return 0; } diff --git a/include/linux/ftrace_event.h b/include/linux/ftrace_event.h index 4cdb3a17bcb..cdc30111d2f 100644 --- a/include/linux/ftrace_event.h +++ b/include/linux/ftrace_event.h @@ -163,6 +163,8 @@ void trace_current_buffer_discard_commit(struct ring_buffer *buffer, void tracing_record_cmdline(struct task_struct *tsk); +int ftrace_output_call(struct trace_iterator *iter, char *name, char *fmt, ...); + struct event_filter; enum trace_reg { @@ -197,6 +199,32 @@ struct ftrace_event_class { extern int ftrace_event_reg(struct ftrace_event_call *event, enum trace_reg type, void *data); +int ftrace_output_event(struct trace_iterator *iter, struct ftrace_event_call *event, + char *fmt, ...); + +int ftrace_event_define_field(struct ftrace_event_call *call, + char *type, int len, char *item, int offset, + int field_size, int sign, int filter); + +struct ftrace_event_buffer { + struct ring_buffer *buffer; + struct ring_buffer_event *event; + struct ftrace_event_file *ftrace_file; + void *entry; + unsigned long flags; + int pc; +}; + +void *ftrace_event_buffer_reserve(struct ftrace_event_buffer *fbuffer, + struct ftrace_event_file *ftrace_file, + unsigned long len); + +void ftrace_event_buffer_commit(struct ftrace_event_buffer *fbuffer); + +int ftrace_event_define_field(struct ftrace_event_call *call, + char *type, int len, char *item, int offset, + int field_size, int sign, int filter); + enum { TRACE_EVENT_FL_FILTERED_BIT, TRACE_EVENT_FL_CAP_ANY_BIT, diff --git a/include/linux/module.h b/include/linux/module.h index eaf60ff9ba9..5a505397511 100644 --- a/include/linux/module.h +++ b/include/linux/module.h @@ -15,7 +15,7 @@ #include <linux/stringify.h> #include <linux/kobject.h> #include <linux/moduleparam.h> -#include <linux/tracepoint.h> +#include <linux/jump_label.h> #include <linux/export.h> #include <linux/percpu.h> diff --git a/include/linux/tracepoint.h b/include/linux/tracepoint.h index 7159a0a933d..812b2553dfd 100644 --- a/include/linux/tracepoint.h +++ b/include/linux/tracepoint.h @@ -48,12 +48,6 @@ extern int tracepoint_probe_register(const char *name, void *probe, void *data); extern int tracepoint_probe_unregister(const char *name, void *probe, void *data); -extern int tracepoint_probe_register_noupdate(const char *name, void *probe, - void *data); -extern int tracepoint_probe_unregister_noupdate(const char *name, void *probe, - void *data); -extern void tracepoint_probe_update_all(void); - #ifdef CONFIG_MODULES struct tp_module { struct list_head list; @@ -68,18 +62,6 @@ static inline bool trace_module_has_bad_taint(struct module *mod) } #endif /* CONFIG_MODULES */ -struct tracepoint_iter { -#ifdef CONFIG_MODULES - struct tp_module *module; -#endif /* CONFIG_MODULES */ - struct tracepoint * const *tracepoint; -}; - -extern void tracepoint_iter_start(struct tracepoint_iter *iter); -extern void tracepoint_iter_next(struct tracepoint_iter *iter); -extern void tracepoint_iter_stop(struct tracepoint_iter *iter); -extern void tracepoint_iter_reset(struct tracepoint_iter *iter); - /* * tracepoint_synchronize_unregister must be called between the last tracepoint * probe unregistration and the end of module exit to make sure there is no |