Re: [PATCH v2 00/11] overlayfs constant inode numbers

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On Mon, Apr 24, 2017 at 12:14:05PM +0300, Amir Goldstein wrote:
> Miklos,
> 
> Following your comments on the 'stable inodes' series from last week,
> this series fixes constant inode numbers for stat(2) with any layer
> configuration.
> 
> For the case of all *lower* layers on same fs that supports NFS export,
> redirect by file handle will be used to optimize the lookup of the copy
> up origin of non-dir inode.
> 
> For the case of *all* layers on same fs, overlayfs also gains:
> - Persistent inode numbers for directories
> - Correct results for du -x
> 
> Consistcy of stat(2) st_ino with readdir(3) d_ino is NOT addressed by
> this series. It will be addressed for the 'samefs' configuration by the
> follow up 'stable inode' work, which is also going to address preserving
> hardlinks on copy up.

Hi Amir,

We need to update Documentation/filesystems/overlayfs.txt as well to
reflect new semantics of reporting st_dev and st_ino?

Vivek
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