linux-kernel - Re: [PATCH] tracefs/eventfs: Use root and instance inodes as default ownership

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Message-ID: <CAHk-=wguvq7yFt3qaLrWoZK5FCK8Joizrb2wu=FN==mYM9PSbg@mail.gmail.com>
Date: Thu, 4 Jan 2024 12:02:00 -0800
From: Linus Torvalds <torvalds@...ux-foundation.org>
To: Steven Rostedt <rostedt@...dmis.org>
Cc: Al Viro <viro@...iv.linux.org.uk>, LKML <linux-kernel@...r.kernel.org>, 
	Linux Trace Kernel <linux-trace-kernel@...r.kernel.org>, Masami Hiramatsu <mhiramat@...nel.org>, 
	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>, Christian Brauner <brauner@...nel.org>, 
	linux-fsdevel@...r.kernel.org, 
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>, Jonathan Corbet <corbet@....net>, linux-doc@...r.kernel.org
Subject: Re: [PATCH] tracefs/eventfs: Use root and instance inodes as default ownership

On Thu, 4 Jan 2024 at 11:35, Linus Torvalds
<torvalds@...ux-foundation.org> wrote:
>>
> Which is *NOT* the inode, because the 'struct file' has other things
> in it (the file position, the permissions that were used at open time
> etc, close-on-exec state etc etc).

That close-on-exec thing was a particularly bad example of things that
are in the 'struct file', because it's in fact the only thing that
*isn't* in 'struct file' and is associated directly with the 'int fd'.

But hopefully the intent was clear despite me picking a particularly
bad example.

            Linus