linux-kernel - Re: [PATCH 1/1] squashfs: enable idmapped mounts

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Message-Id: <166773513784.1468888.296199198590720418.b4-ty@kernel.org>
Date:   Sun,  6 Nov 2022 12:51:55 +0100
From:   Christian Brauner <brauner@...nel.org>
To:     Phillip Lougher <phillip@...ashfs.org.uk>,
        Michael Weiß <michael.weiss@...ec.fraunhofer.de>
Cc:     Christian Brauner <brauner@...nel.org>,
        linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        squashfs-devel@...ts.sourceforge.net
Subject: Re: [PATCH 1/1] squashfs: enable idmapped mounts

From: Christian Brauner (Microsoft) <brauner@...nel.org>

On Mon, 24 Oct 2022 21:15:52 +0200, Michael Weiß wrote:
> For squashfs all needed functionality for idmapped mounts is already
> implemented by the generic handlers in the VFS. Thus, it is sufficient
> to just enable the corresponding FS_ALLOW_IDMAP flag to support
> idmapped mounts.
> 
> We use this for unprivileged (user namespaced) containers based on
> squashfs images as rootfs in GyroidOS.
> 
> [...]

Hey Phillip,

Michael reminded me about this patch just now. I've picked this up now so it
can make it into the next mw. Phillip, in case you'll pick this up just tell me
and I'll drop it.

[1/1] squashfs: enable idmapped mounts
      commit: 01546f1d7142f27002789e8626a32b20d5853a48

Thanks!
Christian