Re: [nfsv4] possible minor corrections of federated-fs-admin-05

[James Lentini <[e-mail]>]

On Thu, 23 Sep 2010, Chuck Lever wrote:

> 
> On Sep 23, 2010, at 10:06 AM, James Lentini wrote:
> 
> > 
> > 
> > On Wed, 22 Sep 2010, Chuck Lever wrote:
> > 
> >> Hi James-
> >> 
> >> The last paragraph of Chapter 5 section 3 says:
> >> 
> >>> If the junction is resolved, the fileserver will indicate the type of resolution that was performed using the FedFsResolveRes's resolve value and include a list of UUIDs for the FSN's FSLs in the FedFsResolveRes's fslUuid array.
> >> 
> >> 
> >> I think that language needs to be updated to reflect what is now 
> >> returned in the result of FEDFS_LOOKUP_JUNCTION.  Most important is 
> >> that an array of FedFsFsl structures is returned, not an array of 
> >> fslUuids.  I don't recall seeing this change in the most recent set 
> >> of diffs, but my memory could be foggy.
> > 
> > Good catch. I will correct that.
> > 
> >> Also, we had previously discussed adding a unique error code to the 
> >> protocol for "procedure not implemented".  Can that be added in the 
> >> next draft update?
> > 
> > Yes, I can add a FEDFS_ERR_NOTSUPP.
> > 
> > At the start of Section 5, the specification requires fileservers with 
> > junctions (internal nodes) to implement all of the procedures. The 
> > procedures are only optional for fileservers that don't support 
> > junctions (leaf nodes), so only leaf nodes would be allowed to return 
> > FEDFS_ERR_NOTSUPP.
> 
> What about CREATE_REPLICATION and friends?

They're currently on the MUST list for internal nodes.

> Can FEDFS_LOOKUP_JUNCTION return NOTSUPP for certain resolveTypes?

Did you have a specific case in mind?

There are several specific error codes, FEDFS_ERR_PATH_TYPE_UNSUPP, 
etc., for reporting LOOKUP errors. Error codes for reporting problems 
with FEDFS_RESOLVE_CACHE requests will be added in the next (-06) 
version of the draft.

Speaking of that, it doesn't appear that anyone proposed 
names/definitions for those errors during the 9/2/10 FedFS meeting (if 
there was a proposal, I apologize for leaving it out of the meeting 
minutes). Do these definitions capture what we agreed to at that 
meeting?


   FEDFS_ERR_NO_CACHE:  The fileserver does not implement an FSN-to-FSL
      cache.

   FEDFS_ERR_UNKOWN_CACHE:  The software receiving the ONC RPC request
      is unaware if the fileserver implements an FSN-to-FSL cache or
      unable to communicate with the FSN-to-FSL cache if it exists.


> > Which procedures should be allowed to return FEDFS_ERR_NOTSUPP? All of 
> > the procedures except FEDFS_NULL?