linux-kernel - Re: linux-next: Tree for Jul 15 (HEADERS

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Message-ID: <CAK7LNATBkx5vH4mgb7GYjOquye0nTRR2+VVJ=y=kk=GyoVVuUw@mail.gmail.com>
Date:   Tue, 16 Jul 2019 15:44:24 +0900
From:   Masahiro Yamada <yamada.masahiro@...ionext.com>
To:     Pablo Neira Ayuso <pablo@...filter.org>
Cc:     Laura Garcia <nevola@...il.com>,
        Randy Dunlap <rdunlap@...radead.org>,
        Stephen Rothwell <sfr@...b.auug.org.au>,
        Linux Next Mailing List <linux-next@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-kbuild <linux-kbuild@...r.kernel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        Netfilter Development Mailing list 
        <netfilter-devel@...r.kernel.org>
Subject: Re: linux-next: Tree for Jul 15 (HEADERS_TEST w/ netfilter tables offload)

On Tue, Jul 16, 2019 at 3:09 AM Pablo Neira Ayuso <pablo@...filter.org> wrote:
>
> On Tue, Jul 16, 2019 at 02:56:09AM +0900, Masahiro Yamada wrote:
> > On Tue, Jul 16, 2019 at 2:33 AM Pablo Neira Ayuso <pablo@...filter.org> wrote:
> > >
> > > On Mon, Jul 15, 2019 at 07:28:04PM +0200, Laura Garcia wrote:
> > > > CC'ing netfilter.
> > > >
> > > > On Mon, Jul 15, 2019 at 6:45 PM Randy Dunlap <rdunlap@...radead.org> wrote:
> > > > >
> > > > > On 7/14/19 9:48 PM, Stephen Rothwell wrote:
> > > > > > Hi all,
> > > > > >
> > > > > > Please do not add v5.4 material to your linux-next included branches
> > > > > > until after v5.3-rc1 has been released.
> > > > > >
> > > > > > Changes since 20190712:
> > > > > >
> > > > >
> > > > > Hi,
> > > > >
> > > > > I am seeing these build errors from HEADERS_TEST (or KERNEL_HEADERS_TEST)
> > > > > for include/net/netfilter/nf_tables_offload.h.s:
> > > > >
> > > > >   CC      include/net/netfilter/nf_tables_offload.h.s
> > > [...]
> > > > > Should this header file not be tested?
> >
> > This means you must endlessly exclude
> > headers that include nf_tables.h
> >
> >
> > > Yes, it should indeed be added.
> >
> > Adding 'header-test-' is the last resort.
>
> OK, so policy now is that all internal headers should compile
> standalone, right?

I would not say that.
I just want to put as much code as possible into the test-coverage.

If there is a good reason to opt out of the header-test, that is OK.
We should take a look at the cause of the error
before blindly adding it into the blacklist.


For this particular case, I just thought some functions
could be localized in net/netfilter/, and would be cleaner.

Having said that, I am not familiar enough with
the netfilter subsystem.
So, this should be reviewed by the experts in the area.


Anyway, CONFIG_NF_TABLES seems mandatory to compile
include/net/netfilter/nf_tables_*.h

So, I will queue the following patch
to suppress the error for now.

diff --git a/include/Kbuild b/include/Kbuild
index 7e9f1acb9dd5..e59605243bca 100644
--- a/include/Kbuild
+++ b/include/Kbuild
@@ -905,10 +905,11 @@ header-test-                      +=
net/netfilter/nf_nat_redirect.h
 header-test-                   += net/netfilter/nf_queue.h
 header-test-                   += net/netfilter/nf_reject.h
 header-test-                   += net/netfilter/nf_synproxy.h
-header-test-                   += net/netfilter/nf_tables.h
-header-test-                   += net/netfilter/nf_tables_core.h
-header-test-                   += net/netfilter/nf_tables_ipv4.h
+header-test-$(CONFIG_NF_TABLES)        += net/netfilter/nf_tables.h
+header-test-$(CONFIG_NF_TABLES)        += net/netfilter/nf_tables_core.h
+header-test-$(CONFIG_NF_TABLES)        += net/netfilter/nf_tables_ipv4.h
 header-test-                   += net/netfilter/nf_tables_ipv6.h
+header-test-$(CONFIG_NF_TABLES)        += net/netfilter/nf_tables_offload.h
 header-test-                   += net/netfilter/nft_fib.h
 header-test-                   += net/netfilter/nft_meta.h
 header-test-                   += net/netfilter/nft_reject.h



This test just landed in upstream,
and will take some time to iron out the issues.

If I am disturbing people too much,
I perhaps need to loosen the policy.
Sorry if this test is too annoying.


Thanks.


--
Best Regards
Masahiro Yamada