[Samba] DFree and sub-Share "disk" (volume?)

James Wright 12wrigja at gmail.com
Mon Feb 25 07:22:28 UTC 2019

Eventually, I found that the reason this doesn't appear to work is that
most clients request for filesystem information without sending "Create
File" requests for their current directory and using that file handle in
the request. This confuses me, as
seems to imply that there was some notion that the commands sent to the
dfree code would (could?) include a proper path. I know it's mentioned in
the docs that "most of the time" the path passed is just ".", but now I'm
interested in knowing when this isn't the case, and what I would have to do
to have this occur.

On Wed, Feb 20, 2019 at 10:11 PM James Wright <12wrigja at gmail.com> wrote:

> James Wright <12wrigja at gmail.com>
> 9:56 PM (13 minutes ago)
> to samba
> Hi Samba users,
> I have a Samba server with a single share backed by a ZFS pool /
> collection of datasets. I can correctly navigate around the share, but the
> free space reporting within clients is inaccurate for various directories,
> especially those that are themselves setup as datasets in ZFS and have
> quota applied to them.
> I read over the documentation for both the 'dfree' and 'get quota command'
> options, but it seems that the paths those pass as their first parameter
> are useless to me, as they mostly seem to be the share's root (represented
> as '.'), not the actual path being queried.
> Looking over the SAMBA source, I believe that if
> https://github.com/samba-team/samba/blob/f33749fc84dacb164d1ac43f6bfcae7afcca34b3/source3/smbd/dfree.c#L63 was
> changed to pass the entire filepath to the dfree command I could achieve
> what I wanted. A couple questions:
>  - Is the filename that is passed there the name of the directory being
> queried, or is my understanding incorrect?
>  - in many places, it's common to see that variable called with the
> basename function. I can't seem to find where that is defined - any
> pointers?
>  - If this is something that would work, would the samba team be open to
> adding this as an option to the dfree config, as I image that it's probably
> not guaranteed to be backwards-compatible with the existing behaviour.
> Thanks,
> James

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