[CRIU] A few network related tests are failing

[Adrian Reber]

On Mon, Oct 29, 2018 at 05:25:50PM +0100, Adrian Reber wrote:
> On one of my test systems some network related tests are failing:
> 
> # ./zdtm.py run -t zdtm/static/socket-tcp6-closed -t zdtm/static/socket-tcp4v6-closed -t zdtm/static/socket-tcp-syn-sent -t zdtm/static/netns-nf --keep-going
> 
> All of those tests either fail with something like:
> 
> tail: cannot open 'zdtm/static/socket-tcp6-closed.out' for reading: No such file or directory
> 
> or:
> 
> ./netns-nf --pidfile=netns-nf.pid --outfile=netns-nf.out --filename=netns-nf.test
> The test failed (0, 1)
> make: *** [Makefile:385: netns-nf.pid] Error 1
>  Test zdtm/static/netns-nf FAIL at ['make', '--no-print-directory', '-C', 'zdtm/static', 'netns-nf.pid'] 
> Test output: ================================
> iptables v1.6.2: can't initialize iptables table `filter': Table does not exist (do you need to insmod?)
> Perhaps iptables or your kernel needs to be upgraded.
> 16:21:51.941:     4: ERR: netns-nf.c:21: Can't set input rule (errno = 2 (No such file or directory))
> 16:21:51.941:     3: ERR: test.c:316: Test exited unexpectedly with code 255
> 
> All of those tests can fail with the iptables error or
> with the tail error. I think this is not a real test
> error but maybe timing related or something like that.
> 
> It is on a 4.18 kernel and all other tests in zdtm are working.
> 
> Any recommendations how to fix this. Where to look?

So I fixed all of the iptables related error by 'git clean -xdf'. It
seems the tests in namespaces were using old binaries.

Now only zdtm/static/socket-tcp6-closed and
zdtm/static/socket-tcp4v6-closed are failing with:

tail: cannot open 'zdtm/static/socket-tcp6-closed.out' for reading: No such file or directory
########### Test zdtm/static/socket-tcp6-closed FAIL at result check ###########
tail: cannot open 'zdtm/static/socket-tcp4v6-closed.out' for reading: No such file or directory
########## Test zdtm/static/socket-tcp4v6-closed FAIL at result check ##########

It seems the file the process write is

/zdtm/static/socket-tcp6-closed.outns

and not

/zdtm/static/socket-tcp6-closed.out

Not sure where the 'ns' suffix comes from.

		Adrian