tree daea751ed98d60c445017472d6f2545452e0224a
parent 7d160a6c462c2c690e074c173b43aad7204049ad
author Trond Myklebust <trond.myklebust@primarydata.com> 1441494418 -0400
committer Trond Myklebust <trond.myklebust@primarydata.com> 1441643777 -0400

NFSv4: Respect the server imposed limit on how many changes we may cache

The NFSv4 delegation spec allows the server to tell a client to limit how
much data it cache after the file is closed. In return, the server
guarantees enough free space to avoid ENOSPC situations, etc.
Prior to this patch, we assumed we could always cache aggressively after
close. Unfortunately, this causes problems with servers that set the
limit to 0 and therefore do not offer any ENOSPC guarantees.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>