On Wed, 15 Feb 2023 15:33:46 -0700
Ross Zwisler <zwisler@xxxxxxxxxxxx> wrote:
> The canonical location for the tracefs filesystem is at /sys/kernel/tracing.
>
> But, from Documentation/trace/ftrace.rst:
>
> Before 4.1, all ftrace tracing control files were within the debugfs
> file system, which is typically located at /sys/kernel/debug/tracing.
> For backward compatibility, when mounting the debugfs file system,
> the tracefs file system will be automatically mounted at:
>
> /sys/kernel/debug/tracing
>
> A few spots in tools/testing/selftests still refer to this older debugfs
> path, so let's update them to avoid confusion.
Reviewed-by: Steven Rostedt (Google) <rostedt@xxxxxxxxxxx>
Shuah,
Care to pull this in through your tree?
-- Steve
>
> Signed-off-by: Ross Zwisler <zwisler@xxxxxxxxxx>
> ---
> tools/testing/selftests/user_events/dyn_test.c | 2 +-
> tools/testing/selftests/user_events/ftrace_test.c | 10 +++++-----
> tools/testing/selftests/user_events/perf_test.c | 8 ++++----
> tools/testing/selftests/vm/protection_keys.c | 4 ++--
> 4 files changed, 12 insertions(+), 12 deletions(-)
>
> diff --git a/tools/testing/selftests/user_events/dyn_test.c b/tools/testing/selftests/user_events/dyn_test.c
> index d6265d14cd51..8879a7b04c6a 100644
> --- a/tools/testing/selftests/user_events/dyn_test.c
> +++ b/tools/testing/selftests/user_events/dyn_test.c
> @@ -16,7 +16,7 @@
>
> #include "../kselftest_harness.h"
>
> -const char *dyn_file = "/sys/kernel/debug/tracing/dynamic_events";
> +const char *dyn_file = "/sys/kernel/tracing/dynamic_events";
> const char *clear = "!u:__test_event";
>
> static int Append(const char *value)
> diff --git a/tools/testing/selftests/user_events/ftrace_test.c b/tools/testing/selftests/user_events/ftrace_test.c
> index 404a2713dcae..a0b2c96eb252 100644
> --- a/tools/testing/selftests/user_events/ftrace_test.c
> +++ b/tools/testing/selftests/user_events/ftrace_test.c
> @@ -16,11 +16,11 @@
>
> #include "../kselftest_harness.h"
>
> -const char *data_file = "/sys/kernel/debug/tracing/user_events_data";
> -const char *status_file = "/sys/kernel/debug/tracing/user_events_status";
> -const char *enable_file = "/sys/kernel/debug/tracing/events/user_events/__test_event/enable";
> -const char *trace_file = "/sys/kernel/debug/tracing/trace";
> -const char *fmt_file = "/sys/kernel/debug/tracing/events/user_events/__test_event/format";
> +const char *data_file = "/sys/kernel/tracing/user_events_data";
> +const char *status_file = "/sys/kernel/tracing/user_events_status";
> +const char *enable_file = "/sys/kernel/tracing/events/user_events/__test_event/enable";
> +const char *trace_file = "/sys/kernel/tracing/trace";
> +const char *fmt_file = "/sys/kernel/tracing/events/user_events/__test_event/format";
>
> static inline int status_check(char *status_page, int status_bit)
> {
> diff --git a/tools/testing/selftests/user_events/perf_test.c b/tools/testing/selftests/user_events/perf_test.c
> index 8b4c7879d5a7..31505642aa9b 100644
> --- a/tools/testing/selftests/user_events/perf_test.c
> +++ b/tools/testing/selftests/user_events/perf_test.c
> @@ -18,10 +18,10 @@
>
> #include "../kselftest_harness.h"
>
> -const char *data_file = "/sys/kernel/debug/tracing/user_events_data";
> -const char *status_file = "/sys/kernel/debug/tracing/user_events_status";
> -const char *id_file = "/sys/kernel/debug/tracing/events/user_events/__test_event/id";
> -const char *fmt_file = "/sys/kernel/debug/tracing/events/user_events/__test_event/format";
> +const char *data_file = "/sys/kernel/tracing/user_events_data";
> +const char *status_file = "/sys/kernel/tracing/user_events_status";
> +const char *id_file = "/sys/kernel/tracing/events/user_events/__test_event/id";
> +const char *fmt_file = "/sys/kernel/tracing/events/user_events/__test_event/format";
>
> struct event {
> __u32 index;
> diff --git a/tools/testing/selftests/vm/protection_keys.c b/tools/testing/selftests/vm/protection_keys.c
> index 95f403a0c46d..0381c34fdd56 100644
> --- a/tools/testing/selftests/vm/protection_keys.c
> +++ b/tools/testing/selftests/vm/protection_keys.c
> @@ -98,7 +98,7 @@ int tracing_root_ok(void)
> void tracing_on(void)
> {
> #if CONTROL_TRACING > 0
> -#define TRACEDIR "/sys/kernel/debug/tracing"
> +#define TRACEDIR "/sys/kernel/tracing"
> char pidstr[32];
>
> if (!tracing_root_ok())
> @@ -124,7 +124,7 @@ void tracing_off(void)
> #if CONTROL_TRACING > 0
> if (!tracing_root_ok())
> return;
> - cat_into_file("0", "/sys/kernel/debug/tracing/tracing_on");
> + cat_into_file("0", "/sys/kernel/tracing/tracing_on");
> #endif
> }
>
