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From: dexen deVries <dexen.devries-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
To: linux-nilfs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: It is not possible to restore file from a mounted snapshot using a hardlink
Date: Sun, 27 Feb 2011 14:20:56 +0100	[thread overview]
Message-ID: <201102271420.57110.dexen.devries@gmail.com> (raw)

Hello,


The following is more of a feature request than problem report, actually.

I've mounted an older snapshot and tried to restore (add it to the current 
filesystem state) by creating a hardlink.
Roughly like:
mount /dev/sdb3 ~/current
mount.nilfs2 /dev/sdb3 ~/old -o ro,cp=1234
cd ~/current
ln ~/old/file.bin ./restored-file.bin

The `ln' returned `Invalid cross-device link'.

I expected such hardlink to have semantics of re-using all the data blocks & 
metadata of file.bin from snapshot as restored-file.bin, so no duplication of 
data blocks happens.


Regards,
-- 
dexen deVries

``One can't proceed from the informal to the formal by formal means.''
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             reply	other threads:[~2011-02-27 13:20 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-02-27 13:20 dexen deVries [this message]
     [not found] ` <201102271420.57110.dexen.devries-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2011-02-27 15:56   ` It is not possible to restore file from a mounted snapshot using a hardlink Jérôme Poulin
2011-02-27 17:08     ` dexen deVries
2011-02-27 16:02   ` Jérôme Poulin

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