linux-kernel - Re: [PATCH v3 2/2] initramfs: introduce do

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Message-ID: <20190517210219.GA5998@rani.riverdale.lan>
Date:   Fri, 17 May 2019 17:02:20 -0400
From:   Arvind Sankar <nivedita@...m.mit.edu>
To:     hpa@...or.com
Cc:     Roberto Sassu <roberto.sassu@...wei.com>, viro@...iv.linux.org.uk,
        linux-security-module@...r.kernel.org,
        linux-integrity@...r.kernel.org, initramfs@...r.kernel.org,
        linux-api@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org, zohar@...ux.vnet.ibm.com,
        silviu.vlasceanu@...wei.com, dmitry.kasatkin@...wei.com,
        takondra@...co.com, kamensky@...co.com, arnd@...db.de,
        rob@...dley.net, james.w.mcmechan@...il.com, niveditas98@...il.com
Subject: Re: [PATCH v3 2/2] initramfs: introduce do_readxattrs()

On Fri, May 17, 2019 at 01:18:11PM -0700, hpa@...or.com wrote:
> 
> Ok... I just realized this does not work for a modular initramfs, composed at load time from multiple files, which is a very real problem. Should be easy enough to deal with: instead of one large file, use one companion file per source file, perhaps something like filename..xattrs (suggesting double dots to make it less likely to conflict with a "real" file.) No leading dot, as it makes it more likely that archivers will sort them before the file proper.
This version of the patch was changed from the previous one exactly to deal with this case --
it allows for the bootloader to load multiple initramfs archives, each
with its own .xattr-list file, and to have that work properly.
Could you elaborate on the issue that you see?