netdev - Re: [PATCH bpf-next 1/4] bpf: add BPF_CGROUP_INET_SOCK

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Date:   Fri, 26 Jun 2020 15:00:34 +0800
From:   kernel test robot <lkp@...el.com>
To:     Stanislav Fomichev <sdf@...gle.com>, netdev@...r.kernel.org,
        bpf@...r.kernel.org
Cc:     kbuild-all@...ts.01.org, clang-built-linux@...glegroups.com,
        davem@...emloft.net, ast@...nel.org, daniel@...earbox.net,
        Stanislav Fomichev <sdf@...gle.com>
Subject: Re: [PATCH bpf-next 1/4] bpf: add BPF_CGROUP_INET_SOCK_RELEASE hook

Hi Stanislav,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on bpf/master]
[also build test ERROR on net/master net-next/master v5.8-rc2 next-20200625]
[cannot apply to bpf-next/master]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use  as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Stanislav-Fomichev/bpf-add-BPF_CGROUP_INET_SOCK_RELEASE-hook/20200626-081210
base:   https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git master
config: x86_64-defconfig (attached as .config)
compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project 6e11ed52057ffc39941cb2de6d93cae522db4782)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # install x86_64 cross compiling tool for clang build
        # apt-get install binutils-x86-64-linux-gnu
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>

All errors (new ones prefixed by >>):

>> net/ipv4/af_inet.c:415:4: error: implicit declaration of function 'BPF_CGROUP_RUN_PROG_INET_SOCK_RELEASE' [-Werror,-Wimplicit-function-declaration]
                           BPF_CGROUP_RUN_PROG_INET_SOCK_RELEASE(sk);
                           ^
   1 error generated.

vim +/BPF_CGROUP_RUN_PROG_INET_SOCK_RELEASE +415 net/ipv4/af_inet.c

   400	
   401	
   402	/*
   403	 *	The peer socket should always be NULL (or else). When we call this
   404	 *	function we are destroying the object and from then on nobody
   405	 *	should refer to it.
   406	 */
   407	int inet_release(struct socket *sock)
   408	{
   409		struct sock *sk = sock->sk;
   410	
   411		if (sk) {
   412			long timeout;
   413	
   414			if (!sk->sk_kern_sock)
 > 415				BPF_CGROUP_RUN_PROG_INET_SOCK_RELEASE(sk);
   416	
   417			/* Applications forget to leave groups before exiting */
   418			ip_mc_drop_socket(sk);
   419	
   420			/* If linger is set, we don't return until the close
   421			 * is complete.  Otherwise we return immediately. The
   422			 * actually closing is done the same either way.
   423			 *
   424			 * If the close is due to the process exiting, we never
   425			 * linger..
   426			 */
   427			timeout = 0;
   428			if (sock_flag(sk, SOCK_LINGER) &&
   429			    !(current->flags & PF_EXITING))
   430				timeout = sk->sk_lingertime;
   431			sk->sk_prot->close(sk, timeout);
   432			sock->sk = NULL;
   433		}
   434		return 0;
   435	}
   436	EXPORT_SYMBOL(inet_release);
   437	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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