linux-kernel - Re: [PATCH v2 2/2] selftests/user_events: Add non-spacing separator check

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Message-Id: <20240528110850.47962854c754f420d1db4685@kernel.org>
Date: Tue, 28 May 2024 11:08:50 +0900
From: Masami Hiramatsu (Google) <mhiramat@...nel.org>
To: Beau Belgrave <beaub@...ux.microsoft.com>
Cc: rostedt@...dmis.org, mathieu.desnoyers@...icios.com,
 linux-kernel@...r.kernel.org, linux-trace-kernel@...r.kernel.org,
 dcook@...ux.microsoft.com
Subject: Re: [PATCH v2 2/2] selftests/user_events: Add non-spacing separator
 check

On Tue, 23 Apr 2024 16:23:38 +0000
Beau Belgrave <beaub@...ux.microsoft.com> wrote:

> The ABI documentation indicates that field separators do not need a
> space between them, only a ';'. When no spacing is used, the register
> must work. Any subsequent register, with or without spaces, must match
> and not return -EADDRINUSE.
> 
> Add a non-spacing separator case to our self-test register case to ensure
> it works going forward.
> 

Looks good to me.

Acked-by: Masami Hiramatsu (Google) <mhiramat@...nel.org>

Thanks!

> Signed-off-by: Beau Belgrave <beaub@...ux.microsoft.com>
> ---
>  tools/testing/selftests/user_events/ftrace_test.c | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 
> diff --git a/tools/testing/selftests/user_events/ftrace_test.c b/tools/testing/selftests/user_events/ftrace_test.c
> index dcd7509fe2e0..0bb46793dcd4 100644
> --- a/tools/testing/selftests/user_events/ftrace_test.c
> +++ b/tools/testing/selftests/user_events/ftrace_test.c
> @@ -261,6 +261,12 @@ TEST_F(user, register_events) {
>  	ASSERT_EQ(0, ioctl(self->data_fd, DIAG_IOCSREG, &reg));
>  	ASSERT_EQ(0, reg.write_index);
>  
> +	/* Register without separator spacing should still match */
> +	reg.enable_bit = 29;
> +	reg.name_args = (__u64)"__test_event u32 field1;u32 field2";
> +	ASSERT_EQ(0, ioctl(self->data_fd, DIAG_IOCSREG, &reg));
> +	ASSERT_EQ(0, reg.write_index);
> +
>  	/* Multiple registers to same name but different args should fail */
>  	reg.enable_bit = 29;
>  	reg.name_args = (__u64)"__test_event u32 field1;";
> @@ -288,6 +294,8 @@ TEST_F(user, register_events) {
>  	ASSERT_EQ(0, ioctl(self->data_fd, DIAG_IOCSUNREG, &unreg));
>  	unreg.disable_bit = 30;
>  	ASSERT_EQ(0, ioctl(self->data_fd, DIAG_IOCSUNREG, &unreg));
> +	unreg.disable_bit = 29;
> +	ASSERT_EQ(0, ioctl(self->data_fd, DIAG_IOCSUNREG, &unreg));
>  
>  	/* Delete should have been auto-done after close and unregister */
>  	close(self->data_fd);
> -- 
> 2.34.1
> 


-- 
Masami Hiramatsu (Google) <mhiramat@...nel.org>