s4:torture/smb2: add 'smb2.bench.session-setup'

s4:torture/smb2: add 'smb2.bench.session-setup'

This test loops over session-setup/logoff as fast as possible,
for nprocs * qdepth loops.

It was created to demonstrate the krb5 replay cache problem
(at least with MIT kerberos before 1.18, I've tested with
1.15 only).

This forces kerberos with the machine account:

time smbtorture //fileserver.example.com/ipc\$ \
        smb2.bench.session-setup \
        --option="torture:timelimit=600" \
        --option="torture:nprocs=50" \
        --option="torture:qdepth=1" \
        --machine-pass \
        --use-kerberos=required

This forces ntlmssp with the machine account:

time smbtorture //fileserver.example.com/ipc\$ \
        smb2.bench.session-setup \
        --option="torture:timelimit=600" \
        --option="torture:nprocs=50" \
        --option="torture:qdepth=1" \
        --machine-pass \
        --use-kerberos=off

This forces anonymous ntlmssp (without depending
on the DC performance):

time smbtorture //fileserver.example.com/ipc\$ \
        smb2.bench.session-setup \
        --option="torture:timelimit=600" \
        --option="torture:nprocs=50" \
        --option="torture:qdepth=1" \
        -U% \
        --use-kerberos=off

Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>
Autobuild-User(master): Volker Lendecke <vl@samba.org>
Autobuild-Date(master): Tue Jul 30 15:18:42 UTC 2024 on atb-devel-224