From: Miklos Szeredi <mszeredi@suse.cz>
Date: Fri, 12 Dec 2014 23:59:43 +0000 (+0100)
Subject: ovl: add mutli-layer infrastructure
X-Git-Tag: fixes-v4.0-rc1~19^2~17^2~18
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=dd662667e6d3e55b42798a6e6e7f37dddc639460;p=pandora-kernel.git

ovl: add mutli-layer infrastructure

Add multiple lower layers to 'struct ovl_fs' and 'struct ovl_entry'.

ovl_entry will have an array of paths, instead of just the dentry.  This
allows a compact array containing just the layers which exist at current
point in the tree (which is expected to be a small number for the majority
of dentries).

The number of layers is not limited by this infrastructure.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
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