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Date:   Mon, 14 Nov 2022 17:00:18 +0800
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Subject: Re: [RFC PATCH] getting misc stats/attributes via xattr API
To:     Miklos Szeredi <miklos@szeredi.hu>, linux-fsdevel@vger.kernel.org
Cc:     Dave Chinner <david@fromorbit.com>, Theodore Ts'o <tytso@mit.edu>,
        Karel Zak <kzak@redhat.com>,
        Greg KH <gregkh@linuxfoundation.org>,
        Christian Brauner <brauner@kernel.org>,
        linux-kernel@vger.kernel.org,
        Linux API <linux-api@vger.kernel.org>,
        linux-man <linux-man@vger.kernel.org>,
        LSM <linux-security-module@vger.kernel.org>,
        Ian Kent <raven@themaw.net>,
        David Howells <dhowells@redhat.com>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Al Viro <viro@zeniv.linux.org.uk>,
        Christian Brauner <christian@brauner.io>,
        Amir Goldstein <amir73il@gmail.com>,
        James Bottomley <James.Bottomley@hansenpartnership.com>
References: <YnEeuw6fd1A8usjj@miu.piliscsaba.redhat.com>
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From:   Abel Wu <wuyun.abel@bytedance.com>
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Hi Miklos and anyone interested in this proposal, is there any update on
this? Sorry that I didn't find any..

Thanks & Best regards,
	Abel

On 5/3/22 8:23 PM, Miklos Szeredi wrote:
> This is a simplification of the getvalues(2) prototype and moving it to the
> getxattr(2) interface, as suggested by Dave.
> 
> The patch itself just adds the possibility to retrieve a single line of
> /proc/$$/mountinfo (which was the basic requirement from which the fsinfo
> patchset grew out of).
> 
> But this should be able to serve Amir's per-sb iostats, as well as a host of
> other cases where some statistic needs to be retrieved from some object.  Note:
> a filesystem object often represents other kinds of objects (such as processes
> in /proc) so this is not limited to fs attributes.
> 
> This also opens up the interface to setting attributes via setxattr(2).
>