netdev - Re: [PATCH net-next] selftests: forwarding: Import top-level lib.sh through $lib

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Message-ID: <877climn45.fsf@nvidia.com>
Date: Wed, 13 Dec 2023 11:03:06 +0100
From: Petr Machata <me@...chata.org>
To: Benjamin Poirier <benjamin.poirier@...il.com>
Cc: Petr Machata <petrm@...dia.com>, Hangbin Liu <liuhangbin@...il.com>,
 "David S. Miller" <davem@...emloft.net>, Eric Dumazet
 <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni
 <pabeni@...hat.com>, netdev@...r.kernel.org, Shuah Khan
 <shuah@...nel.org>, mlxsw@...dia.com, Jonathan Toppins
 <jtoppins@...hat.com>
Subject: Re: [PATCH net-next] selftests: forwarding: Import top-level lib.sh
 through $lib_dir


Benjamin Poirier <benjamin.poirier@...il.com> writes:

> On 2023-12-12 18:22 +0100, Petr Machata wrote:
>> 
>> Hangbin Liu <liuhangbin@...il.com> writes:
>> 
>> > On Mon, Dec 11, 2023 at 01:01:06PM +0100, Petr Machata wrote:
>> >
>> >> @@ -38,7 +38,7 @@ if [[ -f $relative_path/forwarding.config ]]; then
>> >>  	source "$relative_path/forwarding.config"
>> >>  fi
>> >>  
>> >> -source ../lib.sh
>> >> +source ${lib_dir-.}/../lib.sh
>> >>  ##############################################################################
>> >>  # Sanity checks
>> >
>> > Hi Petr,
>> >
>> > Thanks for the report. However, this doesn't fix the soft link scenario. e.g.
>> > The bonding tests tools/testing/selftests/drivers/net/bonding add a soft link
>> > net_forwarding_lib.sh and source it directly in dev_addr_lists.sh.
>> 
>> I see, I didn't realize those exist.
>> 
>> > So how about something like:
>> >
>> > diff --git a/tools/testing/selftests/net/forwarding/lib.sh b/tools/testing/selftests/net/forwarding/lib.sh
>> > index 8f6ca458af9a..7f90248e05d6 100755
>> > --- a/tools/testing/selftests/net/forwarding/lib.sh
>> > +++ b/tools/testing/selftests/net/forwarding/lib.sh
>> > @@ -38,7 +38,8 @@ if [[ -f $relative_path/forwarding.config ]]; then
>> >         source "$relative_path/forwarding.config"
>> >  fi
>> >
>> > -source ../lib.sh
>> > +forwarding_dir=$(dirname $(readlink -f $BASH_SOURCE))
>> > +source ${forwarding_dir}/../lib.sh
>> 
>> Yep, that's gonna work.
>> I'll pass through our tests and send later this week.
>
> There is also another related issue which is that generating a test
> archive using gen_tar for the tests under drivers/net/bonding does not
> include the new lib.sh. This is similar to the issue reported here:
> https://lore.kernel.org/netdev/40f04ded-0c86-8669-24b1-9a313ca21076@redhat.com/
>
> /tmp/x# ./run_kselftest.sh
> TAP version 13
> [...]
> # timeout set to 120
> # selftests: drivers/net/bonding: dev_addr_lists.sh
> # ./net_forwarding_lib.sh: line 41: ../lib.sh: No such file or directory
> # TEST: bonding cleanup mode active-backup                            [ OK ]
> # TEST: bonding cleanup mode 802.3ad                                  [ OK ]
> # TEST: bonding LACPDU multicast address to slave (from bond down)    [ OK ]
> # TEST: bonding LACPDU multicast address to slave (from bond up)      [ OK ]
> ok 4 selftests: drivers/net/bonding: dev_addr_lists.sh
> [...]

The issue is that the symlink becomes a text file during install, and
readlink on that file then becomes a nop. Maybe the bonding tests should
include net/forwarding/lib.sh through a relative path like other tests
in drivers/, instead of this symlink business?