Implement Time Machine quota setting

[ishioni]

Is your feature request related to a problem? Please describe.
Implement time machine quota
Describe the solution you'd like
There are 2 ways to do this, dependent on samba version. For versions that implement time machine properly on vfs_fruit, it is enough to add to the share config

time machine max size = 200G

But I would discourage this, as it recalculates the share free space on every df call by the client (as seen in https://github.com/samba-team/samba/blob/master/source3/modules/vfs_fruit.c#L4985)

The better way to do this is to place a .com.apple.TimeMachine.quota.plist file in the share, with the contents

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>GlobalQuota</key>
<integer>300000000000</integer>
</dict>
</plist>

This works on MacOS 10.9 up to MacOS 11 Big Sur (can be checked by inspecting Info.plist in the sparsebundle under the com.apple.diskimage.sparsebundle key. Note that this quota works per-machine, so each machine backup gets their own quota from this limit, it is not shared.

Describe alternatives you've considered
Filesystem quotas do not work, since samba does not export them to the client (or at least MacOS doesn't recognize them)

[stale]

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[stale]

This issue has been automatically closed because there has been no activity for 90 days. We are sorry that we haven't been able to prioritize it yet. Please feel free to reopen this issue or create a new one. Thank you!

[poranje]

Shouldn't .com.apple.TimeMachine.quota.plist be name .com.apple.timemachine.quota.plist ?
(no capatalisation)

[edgimar]

@votdev, any chance this one might be reconsidered? It seems pretty straightforward to implement -- I am not super familiar with the OMV codebase, but if you can provide suggestions on what would need to change and how, I'm sure that I or others could attempt to create a PR.