[LTP] [PATCH 2/2] nfsstat01: Check that RPC stats don't leak between net namespaces

[Petr Vorel]

Hi Martin,

> Hi,

> On 30. 08. 24 22:15, Petr Vorel wrote:
> > > @@ -93,6 +97,16 @@ do_test()
> > >   		tst_res TPASS "client RPC calls increased"
> > >   	fi

> > > +	if [ $NS_STAT_RHOST -ne 0 ]; then
> > > +		tst_res TINFO "Root NS client RPC calls: $root_calls => $new_root_calls"
> > > +
> > > +		if [ $root_calls -ne $new_root_calls ]; then
> > > +			tst_res TFAIL "RPC stats leaked between net namespaces"
> > > +		else
> > > +			tst_res TPASS "RPC stats stay within net namespaces"
> > > +		fi

> > Maybe also add TCONF message? (can be added before merge)

> >      else
> > 		tst_res TCONF "Not testing leak between root NS and net NS due old kernel"

> I think the TCONF message doesn't make sense here. There are several cases
> where the new check will be skipped:
> 1) the NFS server runs on another machine ($RHOST is not empty)
> 2) the test is configure to ignore namespaces ($LTP_NFS_NETNS_USE_LO is not
> empty)
> 3) /proc/net/rpc/nfs doesn't exist in nested net namespaces

> You want to print the TCONF message only in case #3. Let's keep the
> condition above simple.

Fair enough. I merged just with adding kernel commit and patchset link in the
first commit. Thanks!

NOTE: I noticed your point about mount namespaces (interesting I wonder if there
will be some change), but merged as it reflects the current kernel code.

Kind regards,
Petr