Bharata B Rao wrote:
Hi,
Here is an attempt towards vfs based union mount implementation.
Union mount provides the filesytem namespace unification feature.
Unlike the traditional mounts which hide the contents of the mount point,
the union mount presents the merged view of the mount point and the
mounted filesytem.
does this approach allow one to add directories to the union and have it
behave normally. namely when imagine one has the situation
dir-b
dir-a/ (contains file foo)
if one unions this and deletes foo, that will create a whiteout entry in
dir-a
now, what happens if one does
dir-c
dir-b (now contains whiteout, from previous union).
dir-a (contains file foo)
will one see foo or not. i.e. are whiteouts only looked for in the
topmost dir, or in every dir?
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