Re: [PROBLEM] selftests: net/forwarding/*.sh: 'Command line is not complete. Try option "help"'

[Mirsad Todorovac]

On 7/18/23 09:22, Ido Schimmel wrote:
> On Mon, Jul 17, 2023 at 10:51:04PM +0200, Mirsad Todorovac wrote:
> > Tests fail with error message:
> >
> > Command line is not complete. Try option "help"
> > Failed to create netif
> >
> > The script
> >
> > # tools/testing/seltests/net/forwarding/bridge_igmp.sh
> >
> > bash `set -x` ends with an error:
> >
> > ++ create_netif_veth
> > ++ local i
> > ++ (( i = 1 ))
> > ++ (( i <= NUM_NETIFS ))
> > ++ local j=2
> > ++ ip link show dev
> > ++ [[ 255 -ne 0 ]]
> > ++ ip link add type veth peer name
> > Command line is not complete. Try option "help"
> > ++ [[ 255 -ne 0 ]]
> > ++ echo 'Failed to create netif'
> > Failed to create netif
> > ++ exit 1
> >
> > The problem seems to be linked with this piece of code of "lib.sh":
> >
> > create_netif_veth()
> > {
> >          local i
> >
> >          for ((i = 1; i <= NUM_NETIFS; ++i)); do
> >                  local j=$((i+1))
> >
> >                  ip link show dev ${NETIFS[p$i]} &> /dev/null
> >                  if [[ $? -ne 0 ]]; then
> >                          ip link add ${NETIFS[p$i]} type veth \
> >                                  peer name ${NETIFS[p$j]}
> >                          if [[ $? -ne 0 ]]; then
> >                                  echo "Failed to create netif"
> >                                  exit 1
> >                          fi
> >                  fi
> >                  i=$j
> >          done
> > }
> >
> > Somehow, ${NETIFS[p$i]} is evaluated to an empty string?
>
> You need to provide a configuration file in
> tools/testing/selftests/net/forwarding/forwarding.config. See
> tools/testing/selftests/net/forwarding/forwarding.config.sample for
> example.
>
> Another option is to provide the interfaces on the command line.
>
> ./bridge_igmp.sh veth0 veth1 veth2 veth3
>
> If no configuration file is present, we can try to assume that the
> tests are meant to be run with veth pairs and not with physical
> loopbacks. Something like:
>
> diff --git a/tools/testing/selftests/net/forwarding/lib.sh b/tools/testing/selftests/net/forwarding/lib.sh
> index 71f7c0c49677..5b0183013017 100755
> --- a/tools/testing/selftests/net/forwarding/lib.sh
> +++ b/tools/testing/selftests/net/forwarding/lib.sh
> @@ -16,8 +16,6 @@ TEAMD=${TEAMD:=teamd}
>   WAIT_TIME=${WAIT_TIME:=5}
>   PAUSE_ON_FAIL=${PAUSE_ON_FAIL:=no}
>   PAUSE_ON_CLEANUP=${PAUSE_ON_CLEANUP:=no}
> -NETIF_TYPE=${NETIF_TYPE:=veth}
> -NETIF_CREATE=${NETIF_CREATE:=yes}
>   MCD=${MCD:=smcrouted}
>   MC_CLI=${MC_CLI:=smcroutectl}
>   PING_COUNT=${PING_COUNT:=10}
> @@ -30,6 +28,20 @@ REQUIRE_MZ=${REQUIRE_MZ:=yes}
>   REQUIRE_MTOOLS=${REQUIRE_MTOOLS:=no}
>   STABLE_MAC_ADDRS=${STABLE_MAC_ADDRS:=no}
>   TCPDUMP_EXTRA_FLAGS=${TCPDUMP_EXTRA_FLAGS:=}
> +NETIF_TYPE=${NETIF_TYPE:=veth}
> +NETIF_CREATE=${NETIF_CREATE:=yes}
> +declare -A NETIFS=(
> +       [p1]=veth0
> +       [p2]=veth1
> +       [p3]=veth2
> +       [p4]=veth3
> +       [p5]=veth4
> +       [p6]=veth5
> +       [p7]=veth6
> +       [p8]=veth7
> +       [p9]=veth8
> +       [p10]=veth9
> +)
>   
>   relative_path="${BASH_SOURCE%/*}"
>   if [[ "$relative_path" == "${BASH_SOURCE}" ]]; then

This patch appears to work for the first testing script

root@defiant:# ./bridge_igmp.sh
TEST: IGMPv2 report 239.10.10.10                                    [ OK ]
TEST: IGMPv2 leave 239.10.10.10                                     [ OK ]
TEST: IGMPv3 report 239.10.10.10 is_include                         [ OK ]
TEST: IGMPv3 report 239.10.10.10 include -> allow                   [ OK ]
TEST: IGMPv3 report 239.10.10.10 include -> is_include              [ OK ]
TEST: IGMPv3 report 239.10.10.10 include -> is_exclude              [ OK ]
TEST: IGMPv3 report 239.10.10.10 include -> to_exclude              [ OK ]
TEST: IGMPv3 report 239.10.10.10 exclude -> allow                   [ OK ]
TEST: IGMPv3 report 239.10.10.10 exclude -> is_include              [ OK ]
TEST: IGMPv3 report 239.10.10.10 exclude -> is_exclude              [ OK ]
TEST: IGMPv3 report 239.10.10.10 exclude -> to_exclude              [ OK ]
TEST: IGMPv3 report 239.10.10.10 include -> block                   [ OK ]
TEST: IGMPv3 report 239.10.10.10 exclude -> block                   [ OK ]
TEST: IGMPv3 group 239.10.10.10 exclude timeout                     [ OK ]
TEST: IGMPv3 S,G port entry automatic add to a *,G port             [ OK ]
root@defiant:#

However, I suggest setting tools/testing/selftest/net/forwarding/settings:timeout=150 at least,
because default 45 is premature on my box and it leaves the networking system in an undefined
state upon exit.

Best regards,
Mirsad