On Thu, Jan 4, 2018 at 6:39 PM, Amir Goldstein <amir73il@xxxxxxxxx> wrote:
> Miklos,
>
> This is the 2nd revision of the prep patch series for NFS export.
> I am posing the prep patches only to overlayfs list and will post
> NFS export implementation to fsdevel.
>
Miklos,
3rd revision of prep patches after addressing V2 comments is
available at [1].
Changes since v2:
- Rename mount/config option from "verify" to "nfs_export"
- Rename dir index entries xattr from ".origin" to ".upper"
- Re-factor ovl_{get|set|verify}_origin() helpers
- Abandon ovl_dentry_is_renamed() test for lower st_ino
- Document overhead on mount with full index
- Document change of behavior when verifying lower origin
After you are done with review of NFS export patches
and I will post V3 of prep patches to list.
> In the 1st revision the mount option 'index=all' was used to request
> a full index. This revision re-brands the feature as 'verify=on',
> including a config/module option and documentation that explains the
> benefits of full index (i.e. avoid multiple redirect).
>
In V3, as agreed, the feature name is "nfs_export". There are 2 helpers
called ovl_index_all() and ovl_index_lower() both return the value of
ofs->coinfig.nfs_export, each used in relevant code.
> The prep series goes on a bit beyond implementation of 'verify=on'.
> Patches 17-23 create the whiteout index entries and make some more
> changes that are prerequisites for NFS export implementation.
>
Patches 17-23 as well as NFS export patches have been rebased and
tested. They are mostly unmodified since V2. The complete work is
availabe at [2].
Thanks,
Amir.
[1] https://github.com/amir73il/linux/commits/ovl-index-all-v3
[2] https://github.com/amir73il/linux/commits/ovl-nfs-export
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