[Bug 593227] Re: feature request: add a root-path parameter

[Stéphane Graber]

Marking as Fixed for nbd as Ubuntu ships 2.9.22. Opening a task for ltsp
upstream to start using the new feature.

** Changed in: nbd (Ubuntu)
       Status: New => Fix Released

** Also affects: ltsp
   Importance: Undecided
       Status: New

** Changed in: ltsp
       Status: New => Triaged

** Changed in: ltsp
   Importance: Undecided => Medium

** Changed in: ltsp (Ubuntu)
       Status: New => Triaged

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https://bugs.launchpad.net/bugs/593227

Title:
  feature request: add a root-path parameter

Status in Linux Terminal Server Project:
  Triaged
Status in “ltsp” package in Ubuntu:
  Triaged
Status in “nbd” package in Ubuntu:
  Fix Released

Bug description:
  Currently nbd-server and nbd-client communicate using a different port
  for each image. So if e.g. an LTSP admin wants to use a chroot for
  nvidia-based clients and a chroot for the rest of his clients, he'd
  need to use two ports. And he wanted nbd swapping a third port would
  be needed.

  This is inconvenient and makes IANA applications to standarize the nbd port impossible.
  It'd be better if nbd-client supported two additional parameters, to be sent and processed by nbd-server at the negotiation stage:
   * A -path=/path/to/desired/root option (which of course the server could ignore, if it wasn't in a pool of allowed paths), and
   * A -swap=<requested size> option (to replace the current -swap option). If the server configuration allowed it, nbd-server (or some callback scripts) would create an appropriate swap flie of that size for the client.

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