From 53cf810b1934f08a68e131aeeb16267a778f43df Mon Sep 17 00:00:00 2001 From: Frederic Weisbecker Date: Thu, 18 Nov 2010 02:11:42 +0100 Subject: [PATCH] tracing: Allow syscall trace events for non privileged users As for the raw syscalls events, individual syscall events won't leak system wide information on task bound tracing. Allow non privileged users to use them in such workflow. Signed-off-by: Frederic Weisbecker Cc: Ingo Molnar Cc: Peter Zijlstra Cc: Arnaldo Carvalho de Melo Cc: Thomas Gleixner Cc: Steven Rostedt Cc: Li Zefan Cc: Jason Baron --- include/linux/ftrace_event.h | 8 ++++++++ include/linux/syscalls.h | 6 ++++-- include/trace/ftrace.h | 7 +------ 3 files changed, 13 insertions(+), 8 deletions(-) diff --git a/include/linux/ftrace_event.h b/include/linux/ftrace_event.h index 312dce7e0d52..725bf6bd39f7 100644 --- a/include/linux/ftrace_event.h +++ b/include/linux/ftrace_event.h @@ -198,6 +198,14 @@ struct ftrace_event_call { #endif }; +#define __TRACE_EVENT_FLAGS(name, value) \ + static int __init trace_init_flags_##name(void) \ + { \ + event_##name.flags = value; \ + return 0; \ + } \ + early_initcall(trace_init_flags_##name); + #define PERF_MAX_TRACE_SIZE 2048 #define MAX_FILTER_PRED 32 diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h index cacc27a0e285..13b9731d30cf 100644 --- a/include/linux/syscalls.h +++ b/include/linux/syscalls.h @@ -137,7 +137,8 @@ extern struct trace_event_functions exit_syscall_print_funcs; .class = &event_class_syscall_enter, \ .event.funcs = &enter_syscall_print_funcs, \ .data = (void *)&__syscall_meta_##sname,\ - } + }; \ + __TRACE_EVENT_FLAGS(enter_##sname, TRACE_EVENT_FL_CAP_ANY) #define SYSCALL_TRACE_EXIT_EVENT(sname) \ static struct syscall_metadata \ @@ -152,7 +153,8 @@ extern struct trace_event_functions exit_syscall_print_funcs; .class = &event_class_syscall_exit, \ .event.funcs = &exit_syscall_print_funcs, \ .data = (void *)&__syscall_meta_##sname,\ - } + }; \ + __TRACE_EVENT_FLAGS(exit_##sname, TRACE_EVENT_FL_CAP_ANY) #define SYSCALL_METADATA(sname, nb) \ SYSCALL_TRACE_ENTER_EVENT(sname); \ diff --git a/include/trace/ftrace.h b/include/trace/ftrace.h index 6f540123d43e..e718a917d897 100644 --- a/include/trace/ftrace.h +++ b/include/trace/ftrace.h @@ -84,12 +84,7 @@ #undef TRACE_EVENT_FLAGS #define TRACE_EVENT_FLAGS(name, value) \ - static int __init trace_init_flags_##name(void) \ - { \ - event_##name.flags = value; \ - return 0; \ - } \ - early_initcall(trace_init_flags_##name); + __TRACE_EVENT_FLAGS(name, value) #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) -- 2.20.1