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由 Miklos Szeredi 提交于
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: NMiklos Szeredi <mszeredi@suse.cz>
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