From e110e3d1eaa0f9628918be67ddd32e8ad65a2871 Mon Sep 17 00:00:00 2001 From: Steven Rostedt Date: Mon, 16 Feb 2009 23:38:13 -0500 Subject: [PATCH] ftrace: add pretty print function for traceon and traceoff hooks This patch adds a pretty print version of traceon and traceoff output for set_ftrace_filter. # echo 'sys_open:traceon:4' > set_ftrace_filter # cat set_ftrace_filter #### all functions enabled #### sys_open:traceon:count=4 Signed-off-by: Steven Rostedt --- kernel/trace/trace_functions.c | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) diff --git a/kernel/trace/trace_functions.c b/kernel/trace/trace_functions.c index 5c95708b9dc3..f520aa419dff 100644 --- a/kernel/trace/trace_functions.c +++ b/kernel/trace/trace_functions.c @@ -267,14 +267,42 @@ ftrace_traceoff(unsigned long ip, unsigned long parent_ip, void **data) tracing_off(); } +static int +ftrace_trace_onoff_print(struct seq_file *m, unsigned long ip, + struct ftrace_hook_ops *ops, void *data); + static struct ftrace_hook_ops traceon_hook_ops = { .func = ftrace_traceon, + .print = ftrace_trace_onoff_print, }; static struct ftrace_hook_ops traceoff_hook_ops = { .func = ftrace_traceoff, + .print = ftrace_trace_onoff_print, }; +static int +ftrace_trace_onoff_print(struct seq_file *m, unsigned long ip, + struct ftrace_hook_ops *ops, void *data) +{ + char str[KSYM_SYMBOL_LEN]; + long count = (long)data; + + kallsyms_lookup(ip, NULL, NULL, NULL, str); + seq_printf(m, "%s:", str); + + if (ops == &traceon_hook_ops) + seq_printf(m, "traceon"); + else + seq_printf(m, "traceoff"); + + if (count != -1) + seq_printf(m, ":count=%ld", count); + seq_putc(m, '\n'); + + return 0; +} + static int ftrace_trace_onoff_unreg(char *glob, char *cmd, char *param) { -- 2.20.1