linux-kernel - Re: [PATCH net-next v14 13/13] selftests: add ncdevmem, netcat for devmem TCP

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CAHS8izNBB3+axWFR6cQChAawu194UqzVZ+oZp=c+H5TD4Nd8Zw@mail.gmail.com>
Date: Thu, 27 Jun 2024 13:36:57 -0700
From: Mina Almasry <almasrymina@...gle.com>
To: Jakub Kicinski <kuba@...nel.org>
Cc: netdev@...r.kernel.org, linux-kernel@...r.kernel.org, 
	linux-doc@...r.kernel.org, linux-alpha@...r.kernel.org, 
	linux-mips@...r.kernel.org, linux-parisc@...r.kernel.org, 
	sparclinux@...r.kernel.org, linux-trace-kernel@...r.kernel.org, 
	linux-arch@...r.kernel.org, bpf@...r.kernel.org, 
	linux-kselftest@...r.kernel.org, linux-media@...r.kernel.org, 
	dri-devel@...ts.freedesktop.org, Donald Hunter <donald.hunter@...il.com>, 
	"David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, 
	Paolo Abeni <pabeni@...hat.com>, Jonathan Corbet <corbet@....net>, 
	Richard Henderson <richard.henderson@...aro.org>, Ivan Kokshaysky <ink@...assic.park.msu.ru>, 
	Matt Turner <mattst88@...il.com>, Thomas Bogendoerfer <tsbogend@...ha.franken.de>, 
	"James E.J. Bottomley" <James.Bottomley@...senpartnership.com>, Helge Deller <deller@....de>, 
	Andreas Larsson <andreas@...sler.com>, Jesper Dangaard Brouer <hawk@...nel.org>, 
	Ilias Apalodimas <ilias.apalodimas@...aro.org>, Steven Rostedt <rostedt@...dmis.org>, 
	Masami Hiramatsu <mhiramat@...nel.org>, Mathieu Desnoyers <mathieu.desnoyers@...icios.com>, 
	Arnd Bergmann <arnd@...db.de>, Alexei Starovoitov <ast@...nel.org>, Daniel Borkmann <daniel@...earbox.net>, 
	Andrii Nakryiko <andrii@...nel.org>, Martin KaFai Lau <martin.lau@...ux.dev>, 
	Eduard Zingerman <eddyz87@...il.com>, Song Liu <song@...nel.org>, 
	Yonghong Song <yonghong.song@...ux.dev>, John Fastabend <john.fastabend@...il.com>, 
	KP Singh <kpsingh@...nel.org>, Stanislav Fomichev <sdf@...ichev.me>, Hao Luo <haoluo@...gle.com>, 
	Jiri Olsa <jolsa@...nel.org>, Steffen Klassert <steffen.klassert@...unet.com>, 
	Herbert Xu <herbert@...dor.apana.org.au>, David Ahern <dsahern@...nel.org>, 
	Willem de Bruijn <willemdebruijn.kernel@...il.com>, Shuah Khan <shuah@...nel.org>, 
	Sumit Semwal <sumit.semwal@...aro.org>, Christian König <christian.koenig@....com>, 
	Bagas Sanjaya <bagasdotme@...il.com>, Christoph Hellwig <hch@...radead.org>, 
	Nikolay Aleksandrov <razor@...ckwall.org>, Pavel Begunkov <asml.silence@...il.com>, David Wei <dw@...idwei.uk>, 
	Jason Gunthorpe <jgg@...pe.ca>, Yunsheng Lin <linyunsheng@...wei.com>, 
	Shailend Chand <shailend@...gle.com>, Harshitha Ramamurthy <hramamurthy@...gle.com>, 
	Shakeel Butt <shakeel.butt@...ux.dev>, Jeroen de Borst <jeroendb@...gle.com>, 
	Praveen Kaligineedi <pkaligineedi@...gle.com>, Stanislav Fomichev <sdf@...gle.com>
Subject: Re: [PATCH net-next v14 13/13] selftests: add ncdevmem, netcat for
 devmem TCP

On Thu, Jun 27, 2024 at 12:55 PM Mina Almasry <almasrymina@...gle.com> wrote:
>
> On Wed, Jun 26, 2024 at 5:46 PM Jakub Kicinski <kuba@...nel.org> wrote:
> >
> > On Wed, 26 Jun 2024 15:08:22 -0700 Jakub Kicinski wrote:
> > > On Tue, 25 Jun 2024 19:54:01 +0000 Mina Almasry wrote:
> > > > +CFLAGS += -I../../../net/ynl/generated/
> > > > +CFLAGS += -I../../../net/ynl/lib/
> > > > +
> > > > +LDLIBS += ../../../net/ynl/lib/ynl.a ../../../net/ynl/generated/protos.a
> > >
> > > Not as easy as this.. Please add this commit to your series:
> > > https://github.com/kuba-moo/linux/commit/c130e8cc7208be544ec4f6f3627f1d36875d8c47
> > >
> > > And here's an example of how you then use ynl.mk to code gen and build
> > > for desired families (note the ordering of variables vs includes,
> > > I remember that part was quite inflexible..):
> > > https://github.com/kuba-moo/linux/commit/5d357f97ccd0248ca6136c5e11ca3eadf5091bb3
> >
> > Investigating this further my patches will not work for O=xyz builds
> > either. Please squash this into the relevant changes:
> >
>
> Thanks! I cherry-picked commit 15dbefa97fb98 ("tools: net: package
> libynl for use in selftests"), and then applied the diff below to the
> series [1].
>
> Now:
>
> `git clean -fdx && make  headers_install && make -C
> ./tools/testing/selftests/net` works
>
> `git clean -fdx && make  headers_install && make -C
> ./tools/testing/selftests/net ncdevmem` doesn't work with this error:
>
> make: Entering directory
> '/usr/local/google/home/almasrymina/cos-kernel/tools/testing/selftests/net'
> gcc -Wall -Wl,--no-as-needed -O2 -g -I../../../../usr/include/
> -isystem /usr/local/google/home/almasrymina/cos-kernel/tools/testing/selftests/../../../usr/include
> -I../     ncdevmem.c  -lmnl -o ncdevmem
> ncdevmem.c:34:10: fatal error: netdev-user.h: No such file or directory
>    34 | #include "netdev-user.h"
>       |          ^~~~~~~~~~~~~~~
> compilation terminated.
> make: *** [<builtin>: ncdevmem] Error 1
>
> It seems specifying the target doesn't trigger the libynl.a to be
> built. Isn't this a bug, or is that expected?

Nevermind, from a closer look at the docs, it looks like the proper
way to build one test is:

`make -C ./tools/testing/selftests/net TARGETS=ncdevmem`, which works.

`make -C ./tools/testing/selftests/net ncdevmem` was just a weird way
I was building the tests that worked for me, but it doesn't actually
show up in the docs. I'm guessing I can ignore the failure.

-- 
Thanks,
Mina