Re: [PATCH net-next 4/4] net: add heuristic for enabling TCP fraglist GRO

[kernel test robot <lkp@intel.com>]

Hi Felix,

kernel test robot noticed the following build warnings:

[auto build test WARNING on net-next/main]

url:    https://github.com/intel-lab-lkp/linux/commits/Felix-Fietkau/net-move-skb_gro_receive_list-from-udp-to-core/20240425-060838
base:   net-next/main
patch link:    https://lore.kernel.org/r/20240424180458.56211-5-nbd%40nbd.name
patch subject: [PATCH net-next 4/4] net: add heuristic for enabling TCP fraglist GRO
config: openrisc-defconfig (https://download.01.org/0day-ci/archive/20240425/202404251517.ZUALo8e5-lkp@intel.com/config)
compiler: or1k-linux-gcc (GCC) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240425/202404251517.ZUALo8e5-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202404251517.ZUALo8e5-lkp@intel.com/

All warnings (new ones prefixed by >>):

   net/ipv6/tcpv6_offload.c: In function 'tcp6_check_fraglist_gro':
   net/ipv6/tcpv6_offload.c:48:14: error: implicit declaration of function '__inet6_lookup_established'; did you mean '__inet_lookup_established'? [-Werror=implicit-function-declaration]
      48 |         sk = __inet6_lookup_established(net, net->ipv4.tcp_death_row.hashinfo,
         |              ^~~~~~~~~~~~~~~~~~~~~~~~~~
         |              __inet_lookup_established
>> net/ipv6/tcpv6_offload.c:48:12: warning: assignment to 'struct sock *' from 'int' makes pointer from integer without a cast [-Wint-conversion]
      48 |         sk = __inet6_lookup_established(net, net->ipv4.tcp_death_row.hashinfo,
         |            ^
   cc1: some warnings being treated as errors


vim +48 net/ipv6/tcpv6_offload.c

    16	
    17	static bool tcp6_check_fraglist_gro(struct sk_buff *skb)
    18	{
    19		const struct ipv6hdr *hdr = skb_gro_network_header(skb);
    20		struct net *net = dev_net(skb->dev);
    21		unsigned int off, hlen, thlen;
    22		struct tcphdr *th;
    23		struct sock *sk;
    24		int iif, sdif;
    25	
    26		if (!(skb->dev->features & NETIF_F_GRO_FRAGLIST))
    27			return false;
    28	
    29		inet6_get_iif_sdif(skb, &iif, &sdif);
    30	
    31		off = skb_gro_offset(skb);
    32		hlen = off + sizeof(*th);
    33		th = skb_gro_header(skb, hlen, off);
    34		if (unlikely(!th))
    35			return false;
    36	
    37		thlen = th->doff * 4;
    38		if (thlen < sizeof(*th))
    39			return false;
    40	
    41		hlen = off + thlen;
    42		if (!skb_gro_may_pull(skb, hlen)) {
    43			th = skb_gro_header_slow(skb, hlen, off);
    44			if (unlikely(!th))
    45				return false;
    46		}
    47	
  > 48		sk = __inet6_lookup_established(net, net->ipv4.tcp_death_row.hashinfo,
    49						&hdr->saddr, th->source,
    50						&hdr->daddr, ntohs(th->dest),
    51						iif, sdif);
    52		if (!sk)
    53			return true;
    54	
    55		sock_put(sk);
    56	
    57		return false;
    58	}
    59	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki