From: KP Singh <kpsingh@kernel.org>
To: Ilya Leoshkevich <iii@linux.ibm.com>
Cc: Andrii Nakryiko <andrii.nakryiko@gmail.com>,
Alexei Starovoitov <alexei.starovoitov@gmail.com>,
Lorenz Bauer <lmb@cloudflare.com>, Shuah Khan <shuah@kernel.org>,
Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
Andrii Nakryiko <andrii@kernel.org>,
kernel-team <kernel-team@cloudflare.com>,
"open list:KERNEL SELFTEST FRAMEWORK"
<linux-kselftest@vger.kernel.org>,
Network Development <netdev@vger.kernel.org>,
bpf <bpf@vger.kernel.org>, LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH bpf] selftests: bpf: check map in map pruning
Date: Thu, 18 Nov 2021 16:20:34 +0100 [thread overview]
Message-ID: <CACYkzJ5rTQH+NgxmNv+SYc+OdYKuOLHi=_8y1RVap+SjeQUAbw@mail.gmail.com> (raw)
In-Reply-To: <06aa2d62d09bcd0a39898f7dcc7fb2fcdc262081.camel@linux.ibm.com>
On Thu, Nov 18, 2021 at 12:56 PM Ilya Leoshkevich <iii@linux.ibm.com> wrote:
>
> On Wed, 2021-11-17 at 17:38 -0800, Andrii Nakryiko wrote:
> > On Wed, Nov 17, 2021 at 5:29 PM Andrii Nakryiko
> > <andrii.nakryiko@gmail.com> wrote:
> > >
> > > On Wed, Nov 17, 2021 at 5:01 PM Alexei Starovoitov
> > > <alexei.starovoitov@gmail.com> wrote:
> > > >
> > > > On Wed, Nov 17, 2021 at 08:47:45AM +0000, Lorenz Bauer wrote:
> > > > > On Sat, 13 Nov 2021 at 01:27, Alexei Starovoitov
> > > > > <alexei.starovoitov@gmail.com> wrote:
> > > > > >
> > > > > > Not sure how you've tested it, but it doesn't work in unpriv:
> > > > > > $ test_verifier 789
> > > > > > #789/u map in map state pruning FAIL
> > > > > > processed 26 insns (limit 1000000) max_states_per_insn 0
> > > > > > total_states
> > > > > > 2 peak_states 2 mark_read 1
> > > > > > #789/p map in map state pruning OK
> > > > >
> > > > > Strange, I have a script that I use for bisecting which uses a
> > > > > minimal
> > > > > .config + virtue to run a vm, plus I was debugging in gdb at the
> > > > > same
> > > > > time. I might have missed this, apologies.
> > > > >
> > > > > I guess vmtest.sh is the canonical way to run tests now?
> > > >
> > > > vmtest.sh runs test_progs only. That's the minimum bar that
> > >
> > > It runs test_progs by default, unless something else is requested.
> > > You
> > > can run anything inside it, e.g.:
> > >
> > > ./vmtest.sh -- ./test_maps
> > >
> > > BTW, we recently moved configs around in libbpf repo on Github, so
> > > this script broke. I'm sending a fix in a few minutes, hopefully.
> >
> > ... and of course it's not that simple. [0] recently changed how we
> > build qemu image and vmtest.sh had some assumptions. Some trivial
> > things I fixed, but I'm not too familiar with the init scripts stuff.
> > Adding Ilya and KP to hopefully help with this. Ilya, KP, can you
> > please help restore vmtest.sh functionality?
> >
> > After fixing few paths:
> >
> > diff --git a/tools/testing/selftests/bpf/vmtest.sh
> > b/tools/testing/selftests/bpf/vmtest.sh
> > index 027198768fad..7ea40108b85d 100755
> > --- a/tools/testing/selftests/bpf/vmtest.sh
> > +++ b/tools/testing/selftests/bpf/vmtest.sh
> > @@ -13,8 +13,8 @@ DEFAULT_COMMAND="./test_progs"
> > MOUNT_DIR="mnt"
> > ROOTFS_IMAGE="root.img"
> > OUTPUT_DIR="$HOME/.bpf_selftests"
> > -
> > KCONFIG_URL="https://raw.githubusercontent.com/libbpf/libbpf/master/travis-ci/vmtest/configs/latest.config
> > "
> > -
> > KCONFIG_API_URL="https://api.github.com/repos/libbpf/libbpf/contents/travis-ci/vmtest/configs/latest.config
> > "
> > +KCONFIG_URL="https://raw.githubusercontent.com/libbpf/libbpf/master/travis-ci/vmtest/configs/config-latest.x86_64
> > "
> > +KCONFIG_API_URL="https://api.github.com/repos/libbpf/libbpf/contents/travis-ci/vmtest/configs/config-latest.x86_64
> > "
> > INDEX_URL="https://raw.githubusercontent.com/libbpf/libbpf/master/travis-ci/vmtest/configs/INDEX
> > "
> > NUM_COMPILE_JOBS="$(nproc)"
> > LOG_FILE_BASE="$(date +"bpf_selftests.%Y-%m-%d_%H-%M-%S")"
> > @@ -85,7 +85,7 @@ newest_rootfs_version()
> > {
> > {
> > for file in "${!URLS[@]}"; do
> > - if [[ $file =~ ^libbpf-vmtest-rootfs-(.*)\.tar\.zst$
> > ]]; then
> > + if [[ $file =~
> > ^x86_64/libbpf-vmtest-rootfs-(.*)\.tar\.zst$ ]]; then
> > echo "${BASH_REMATCH[1]}"
> > fi
> > done
> >
> > ... the next problem is more severe. Script complains about missing
> > /etc/rcS.d, if I just force-created it, when kernel boots we get:
> >
> >
> > [ 1.050803] ---[ end Kernel panic - not syncing: No working init
> > found. Try passing init= option to kernel. See Linux
> > Documentation/admin-guide/init.rst for guidance. ]---
> >
> >
> > Please help.
> >
> > [0] https://github.com/libbpf/libbpf/pull/204
>
> I've posted a fix, please give it a try:
>
> https://lore.kernel.org/bpf/20211118115225.1349726-1-iii@linux.ibm.com/
>
> Missing was the ${ARCH} prefix when downloading the image, so it ended
> up being empty. Now your ~/.bpf_selftests is poisoned with it, so
> you'll need to run vmtest.sh with -i switch once in order to remove the
> bad image.
Thanks for taking a look and sending a fix.
prev parent reply other threads:[~2021-11-18 15:20 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-11 16:14 [PATCH bpf] selftests: bpf: check map in map pruning Lorenz Bauer
2021-11-12 15:20 ` patchwork-bot+netdevbpf
2021-11-13 1:27 ` Alexei Starovoitov
2021-11-17 8:47 ` Lorenz Bauer
2021-11-18 1:00 ` Alexei Starovoitov
2021-11-18 1:29 ` Andrii Nakryiko
2021-11-18 1:38 ` Andrii Nakryiko
2021-11-18 11:05 ` Ilya Leoshkevich
2021-11-18 11:56 ` Ilya Leoshkevich
2021-11-18 15:20 ` KP Singh [this message]
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