linux-kernel - Re: [PATCH v3] tracing/selftests: Add ownership modification tests for eventfs

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Message-ID: <20231221211604.5062f4e8@gandalf.local.home>
Date: Thu, 21 Dec 2023 21:16:04 -0500
From: Steven Rostedt <rostedt@...dmis.org>
To: Shuah Khan <shuah@...nel.org>
Cc: LKML <linux-kernel@...r.kernel.org>, Linux Trace Kernel
 <linux-trace-kernel@...r.kernel.org>, Masami Hiramatsu
 <mhiramat@...nel.org>, Mark Rutland <mark.rutland@....com>, Mathieu
 Desnoyers <mathieu.desnoyers@...icios.com>, Linus Torvalds
 <torvalds@...ux-foundation.org>, Linux selftests
 <linux-kselftest@...r.kernel.org>
Subject: Re: [PATCH v3] tracing/selftests: Add ownership modification tests
 for eventfs


Shuah,

This patch has no dependencies. You can take it through your tree for the
next merge window if you want. If not, I can take it.

Thanks,

-- Steve


On Thu, 21 Dec 2023 21:12:29 -0500
Steven Rostedt <rostedt@...dmis.org> wrote:

> From: "Steven Rostedt (Google)" <rostedt@...dmis.org>
> 
> As there were bugs found with the ownership of eventfs dynamic file
> creation. Add a test to test it.
> 
> It will remount tracefs with a different gid and check the ownership of
> the eventfs directory, as well as the system and event directories. It
> will also check the event file directories.
> 
> It then does a chgrp on each of these as well to see if they all get
> updated as expected.
> 
> Then it remounts the tracefs file system back to the original group and
> makes sure that all the updated files and directories were reset back to
> the original ownership.
> 
> It does the same for instances that change the ownership of he instance
> directory.
> 
> Note, because the uid is not reset by a remount, it is tested for every
> file by switching it to a new owner and then back again.
> 
> Signed-off-by: Steven Rostedt (Google) <rostedt@...dmis.org>
> ---
>