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From: Anders Dellien <anders.dellien@axis.com>
To: "linux-unionfs@vger.kernel.org" <linux-unionfs@vger.kernel.org>,
	"miklos@szeredi.hu" <miklos@szeredi.hu>
Subject: [Help] Problem when using overlayfs with LoadPin
Date: Fri, 8 Nov 2019 08:42:02 +0000	[thread overview]
Message-ID: <1573202522019.97305@axis.com> (raw)

Hi all,

I have previously successfully used LoadPin [https://www.kernel.org/doc/html/latest/admin-guide/LSM/LoadPin.html]
together with overlayfs, however commit a6518f "vfs: don't open real" introduces a regression.

(from loadpin.c):

        /* file_dentry sees through overlays */
        load_root = file_dentry(file)->d_sb;  (here, load_root->s_bdev is NULL and not the actual block device from the lower layer)

Questions:
* Maybe this is expected behavior and I am doing something wrong? Maybe there is some build- or mount option that
could fix the problem?
* If this really is a bug in overlayfs then I would be happy to try to fix it - however as I am not familiar with the code
I would very much appreciate if someone more knowledgeable could point me in the right direction.

Thanks,
Anders


             reply	other threads:[~2019-11-08  8:42 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-08  8:42 Anders Dellien [this message]
2019-11-08  9:02 ` [Help] Problem when using overlayfs with LoadPin Miklos Szeredi

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