[PATCH] vfs_shadow_copy2: add snapsharepath parameter

[Michael Adam]

On 2016-01-22 at 12:08 +0200, Uri Simchoni wrote:
> 
> 
> On 01/21/2016 10:44 PM, Michael Adam wrote:
> >I don't see yet that the snapsharepath really gains anything. Will follow
> >up with details. Michael
> The use case is as follows:
> 
> In the original volume we have:
> /mount/
>       +dir1
>       |
>       +dir2/
>            +subdir
> 
> And we have 2 shares:
> [share1]
> path = /mount/dir1
> 
> [share2]
> path = /mount/dir2/subdir
> 
> Now suppose we have a backup system that backs up not the whole volume, just
> the shares, and exposes snapshots to the user according to the logical
> structure as follows (this is the file-system view of the snapshots):
> 
> /snapshots/
>           + at GMT-XXX/
>           |        +share1
>           |        |
>           |        +share2
>           |
>           + at GMT-YYY/
>                    +share1
>                    |
>                    +share2

Ah, I originally confused it from share1 and share2 being
above the GMT- dir, not below. And that would have been
achieved with combinations of basedir and snapdir. :-)

Thanks for the explanation, pushed.

Michael
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