Date: Fri, 03 Sep 2010 09:36:38 +0300 From: Andriy Gapon <avg@icyb.net.ua> To: Phillip Nordwall <phillip.nordwall@gmail.com> Cc: freebsd-fs@freebsd.org Subject: Re: ZFS mount_unionfs or ZFS overlay Message-ID: <4C809776.6000204@icyb.net.ua> In-Reply-To: <AANLkTimFTBJGsGitgT%2Bs6fHuczQ=QY_RV7yxELDxAYUz@mail.gmail.com> References: <AANLkTimFTBJGsGitgT%2Bs6fHuczQ=QY_RV7yxELDxAYUz@mail.gmail.com>
next in thread | previous in thread | raw e-mail | index | archive | help
on 03/09/2010 00:45 Phillip Nordwall said the following: > I'm trying to do a mount_unionfs of a zfs file system over another > filesystem and am getting an Operation not supported. If I try to do a zfs > mount -O (for an overlay) I get the following error: no overlay mounts > support on FreeBSD, ignoring. > > I'm thinking about digging into the code (guided by The Design and > Implementation of the FreeBSD Operating Sytem) to find out how to make zfs > union mounts work, but I figured I should ask here if there is a good reason > why it is not currently implemented. To be able to work as upper layer in unionfs a filesystem should have support for "whiteouts". This hint should get you started. -- Andriy Gapon
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?4C809776.6000204>