nested zfs datasets and NFS4

[Allan Jude]

On 2020-08-18 05:16, Julien Cigar wrote:
> Hello,
> 
> With the following configuration (1) I don't understand why do I have
> access to /usr/jails/j_www1/filer/webapps/phegea as it is not mounted..?
> I thought that with nested ZFS datasets each dataset should be exported
> and mounted explicitely ..
> 
> (1): https://gist.githubusercontent.com/silenius/2f4e1418d77074d610996b0977776f18/raw/2cb2e5d0bb7ebd9c8e69d6c14245c41051c11bf5/gistfile1.txt
> 
> any idea?
> 
> Thanks,
> Julien
> 
> 

Are you using NFSv3 or v4 on the client?

With v4, you can cross mount boundries with a single nfs mount. This is
very useful for things like NFS mounting homedirs, as you can mount just
home and have access to each user's personal dataset with out 100s of
separate mounts on the client.

If you want a child dataset NOT to be reachable, 'zfs set sharenfs=off
dataset', and it will not be reachable via NFSv4

-- 
Allan Jude

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