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ftrace: Move the probe function into the tracing directory 

As nothing outside the tracing directory uses the function probes mechanism,
I'm moving the prototypes out of the include/linux/ftrace.h and into the
local kernel/trace/trace.h header. I plan on making them hook to the
trace_array structure which is local to kernel/trace, and I do not want to
expose it to the rest of the kernel. This requires that the probe functions
must also be local to tracing. But luckily nothing else uses them.

Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
This commit is contained in:
Steven Rostedt (VMware) 2017-03-31 19:01:14 -04:00
parent a9064f676e
commit ec19b85913
2 changed files with 25 additions and 24 deletions
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24
include/linux/ftrace.h
View File

@ -360,30 +360,6 @@ void ftrace_bug(int err, struct dyn_ftrace *rec);
struct seq_file;
struct ftrace_probe_ops {
void (*func)(unsigned long ip,
unsigned long parent_ip,
void **data);
int (*init)(struct ftrace_probe_ops *ops,
unsigned long ip, void **data);
void (*free)(struct ftrace_probe_ops *ops,
unsigned long ip, void **data);
int (*print)(struct seq_file *m,
unsigned long ip,
struct ftrace_probe_ops *ops,
void *data);
};
extern int
register_ftrace_function_probe(char *glob, struct ftrace_probe_ops *ops,
void *data);
extern void
unregister_ftrace_function_probe(char *glob, struct ftrace_probe_ops *ops,
void *data);
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(const void *start, const void *end);
extern int ftrace_nr_registered_ops(void);

25
kernel/trace/trace.h
View File

@ -923,6 +923,31 @@ static inline void ftrace_pid_follow_fork(struct trace_array *tr, bool enable) {
#endif /* CONFIG_FUNCTION_TRACER */
#if defined(CONFIG_FUNCTION_TRACER) && defined(CONFIG_DYNAMIC_FTRACE)
struct ftrace_probe_ops {
void (*func)(unsigned long ip,
unsigned long parent_ip,
void **data);
int (*init)(struct ftrace_probe_ops *ops,
unsigned long ip, void **data);
void (*free)(struct ftrace_probe_ops *ops,
unsigned long ip, void **data);
int (*print)(struct seq_file *m,
unsigned long ip,
struct ftrace_probe_ops *ops,
void *data);
};
extern int
register_ftrace_function_probe(char *glob, struct ftrace_probe_ops *ops,
void *data);
extern void
unregister_ftrace_function_probe(char *glob, struct ftrace_probe_ops *ops,
void *data);
extern void
unregister_ftrace_function_probe_func(char *glob, struct ftrace_probe_ops *ops);
extern void unregister_ftrace_function_probe_all(char *glob);
void ftrace_create_filter_files(struct ftrace_ops *ops,
struct dentry *parent);
void ftrace_destroy_filter_files(struct ftrace_ops *ops);