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authorSteven Rostedt <srostedt@redhat.com>2009-02-14 00:40:25 -0500
committerSteven Rostedt <srostedt@redhat.com>2009-02-16 17:06:02 -0500
commitf6180773d90595650e11de0118bb112018290915 (patch)
treeccf8642d7ac584f73e7820fae64fc4daf4546f6b /include
parente68746a271eb3393a2183840be9e903caddf765b (diff)
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ftrace: add command interface for function selection
Allow for other tracers to add their own commands for function selection. This interface gives a trace the ability to name a command for function selection. Right now it is pretty limited in what it offers, but this is a building step for more features. The :mod: command is converted to this interface and also serves as a template for other implementations. Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Diffstat (limited to 'include')
-rw-r--r--include/linux/ftrace.h16
1 files changed, 16 insertions, 0 deletions
diff --git a/include/linux/ftrace.h b/include/linux/ftrace.h
index 106b790..f0a0ecc 100644
--- a/include/linux/ftrace.h
+++ b/include/linux/ftrace.h
@@ -95,6 +95,13 @@ stack_trace_sysctl(struct ctl_table *table, int write,
loff_t *ppos);
#endif
+struct ftrace_func_command {
+ struct list_head list;
+ char *name;
+ int (*func)(char *func, char *cmd,
+ char *params, int enable);
+};
+
#ifdef CONFIG_DYNAMIC_FTRACE
/* asm/ftrace.h must be defined for archs supporting dynamic ftrace */
#include <asm/ftrace.h>
@@ -119,6 +126,9 @@ struct dyn_ftrace {
int ftrace_force_update(void);
void ftrace_set_filter(unsigned char *buf, int len, int reset);
+int register_ftrace_command(struct ftrace_func_command *cmd);
+int unregister_ftrace_command(struct ftrace_func_command *cmd);
+
/* defined in arch */
extern int ftrace_ip_converted(unsigned long ip);
extern int ftrace_dyn_arch_init(void *data);
@@ -202,6 +212,12 @@ extern void ftrace_enable_daemon(void);
# define ftrace_disable_daemon() do { } while (0)
# define ftrace_enable_daemon() do { } while (0)
static inline void ftrace_release(void *start, unsigned long size) { }
+static inline int register_ftrace_command(struct ftrace_func_command *cmd)
+{
+}
+static inline int unregister_ftrace_command(char *cmd_name)
+{
+}
#endif /* CONFIG_DYNAMIC_FTRACE */
/* totally disable ftrace - can not re-enable after this */