2.2.0 : NFS quotas

David Lee T.D.Lee at durham.ac.uk
Thu Apr 26 17:46:21 GMT 2001

Sorry that the following is so vague.  I hope to hope able to dig deeper
in the next week or so, but cannot promise, so I thought I ought to flag
up the issue.

Under 2.2.0, on our Solaris 2.x systems, I've been seeing smbd sometimes
disappearing.  I have a sneaky suspicion that the new "quotas over NFS"
functionality might be involved.

File: "smbd/quotas.c"

For instance, at line 341:
   if ((clnt = clnt_create(host, RQUOTAPROG, RQUOTAVERS, "udp")) != NULL) {

suppose this fails?  Then "clnt" will be NULL.

I suspect the code ought to arrange to "return(False)" fairly swiftly, but
it doesn't.

Perhaps the intention is to pick this up at line 364: 
   if (quotastat == 0 || quotastat == 3) {

But if so, the "return(False)" inside the expected "if {...}" would seem
to be missing.  (And anyway, is it safe to rely on this condition for the
previous condition?)

It seems that following such a failure, there is a reasonable chance that
the code could still reach lines 378ff, which assumes that everything has
been OK, when it hasn't.  Indeed by line 398: 
it might try to follow off the NULL clnt and segfault...

[ Also, line 389:
   if (D.dqb_curblocks == D.dqb_curblocks == 1)
looks peculiar. ]

My apologies again that this is so vague (and further apologies if the
code is fine and I am unjustly maligning it). 


:  David Lee                                I.T. Service          :
:  Systems Programmer                       Computer Centre       :
:                                           University of Durham  :
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