linux-kernel - Re: Upcoming: Notifications, FS notifications and fsinfo()

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Message-ID: <CAJfpeguQAw+Mgc8QBNd+h3KV8=Y-SOGT7TB_N_54wa8MCoOSzg@mail.gmail.com>
Date:   Fri, 3 Apr 2020 13:38:13 +0200
From:   Miklos Szeredi <miklos@...redi.hu>
To:     Lennart Poettering <mzxreary@...inter.de>
Cc:     Ian Kent <raven@...maw.net>, David Howells <dhowells@...hat.com>,
        Christian Brauner <christian.brauner@...ntu.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Al Viro <viro@...iv.linux.org.uk>, dray@...hat.com,
        Karel Zak <kzak@...hat.com>,
        Miklos Szeredi <mszeredi@...hat.com>,
        Steven Whitehouse <swhiteho@...hat.com>,
        Jeff Layton <jlayton@...hat.com>, andres@...razel.de,
        keyrings@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org, Aleksa Sarai <cyphar@...har.com>
Subject: Re: Upcoming: Notifications, FS notifications and fsinfo()

On Fri, Apr 3, 2020 at 1:11 PM Lennart Poettering <mzxreary@...inter.de> wrote:
>
> On Fr, 03.04.20 09:44, Ian Kent (raven@...maw.net) wrote:
>
> > > Currently the only way to find the mount id from a path is by parsing
> > > /proc/self/fdinfo/$fd.  It is trivial, however, to extend statx(2) to
> > > return it directly from a path.   Also the mount notification queue
> > > that David implemented contains the mount ID of the changed mount.
>
> I would love to have the mount ID exposed via statx().

Here's a patch.

Thanks,
Miklos

View attachment "statx-add-mount-id.patch" of type "text/x-patch" (2253 bytes)