[Bug tapsets/26666] nfsd tapset - fh_export and fh_dentry always NULL for NFSv3

["m.j.harvey at imperial dot ac.uk" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=26666

--- Comment #3 from MJH <m.j.harvey at imperial dot ac.uk> ---
(In reply to Frank Ch. Eigler from comment #2)
> Do you think we should extend the example, or make a nfsd3_watch.stp sample?

 I'd be inclined to make a separate one, maybe renaming the others nfs4*.

The probe I peosted earlier relied on a return probe being able to access final
values of an argument. This worked on my test machine but not in our production
environment, and I understand the former is not intended behaviour. So, here's
what we are using now:


global ip
global pf
global uid

probe module("nfsd").function("nfsd3_proc_*") {
    ip[tid()] = addr_from_rqst_str($rqstp)
    pf[tid()] = probefunc()
    uid[tid()] = $rqstp->rq_cred->cr_uid->val
}

probe module("nfsd").function("nfsd_permission") {
    printf("%d %s %s : %s\n", uid[tid()], pf[tid()], ip[tid()], inode_path(
$dentry->d_inode ) )
}

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