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 4:43 PM, James Lentini wrote:
> 
<snip> 
> > 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.
> 
> Then FEDFS_OK MUST mean that the file server's cache now matches the 
> results returned by FEDFS_LOOKUP_JUNCTION?

These error codes are for when FEDFS_LOOKUP_JUNCTION is called with 
the FEDFS_RESOLVE_CACHE argument.

For the case you are asking about, when FEDFS_LOOKUP_JUNCTION is 
called with the FEDFS_RESOLVE_NSDB argument, we'll need another error 
code or another result value (as you suggest below).

> Are these new error codes returned with a FedFsFsl list, or are they 
> returned with no results?

No results.

> It might make more sense to treat these like the returned 
> ResolveType, instead of using them as the operation's result code, 
> imo.

I was thinking of an error code to indicate that the NSDB resolution 
was successful but the FSN-to-FSL cache was not updated 
(FEDFS_NO_CACHE_UPDATE?). Something like this:

    /// struct FedFsLookupResOk {
    ///         FedFsFsn               fsn;
    ///         FedFsFsl               fsl<>;
    /// };
    ///
    /// struct FedFsLookupResReferralVal {
    ///         FedFsNsdbName          targetNsdb;
    ///         unsigned int           ldapResultCode;
    /// };
    ///
    /// union FedFsLookupRes switch (FedFsStatus status) {
    ///  case FEDFS_OK:
    ///  case FEDFS_ERR_NO_CACHE_UPDATE:
    ///         FedFsLookupResOk           resok;
    ///  case FEDFS_ERR_NSDB_LDAP_VAL:
    ///         unsigned int               ldapResultCode;
    ///  case FEDFS_ERR_NSDB_LDAP_REFERRAL:
    ///  case FEDFS_ERR_NSDB_PARAMS_LDAP_REFERRAL:
    ///         FedFsNsdbName              targetNsdb;
    ///  case FEDFS_ERR_NSDB_LDAP_REFERRAL_VAL:
    ///         FedFsLookupResReferralVal  resReferralVal;
    ///  default:
    ///         void;
    /// };