netdev - Re: [PATCH net-next 2/2] openvswitch: Add timeout support to ct action

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Date:   Sat, 23 Mar 2019 16:35:45 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Yi-Hung Wei <yihung.wei@...il.com>
Cc:     kbuild-all@...org, netdev@...r.kernel.org,
        Yi-Hung Wei <yihung.wei@...il.com>,
        Pravin Shelar <pshelar@....org>
Subject: Re: [PATCH net-next 2/2] openvswitch: Add timeout support to ct
 action

Hi Yi-Hung,

Thank you for the patch! Perhaps something to improve:

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

url:    https://github.com/0day-ci/linux/commits/Yi-Hung-Wei/netfilter-Export-nf_ct_destroy_timeout/20190323-094843
reproduce:
        # apt-get install sparse
        make ARCH=x86_64 allmodconfig
        make C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__'


sparse warnings: (new ones prefixed by >>)

   net//openvswitch/conntrack.c:1854:25: sparse: undefined identifier 'xt_ct_destroy_timeout'
>> net//openvswitch/conntrack.c:1154:28: sparse: incompatible types in comparison expression (different address spaces)
   net//openvswitch/conntrack.c:1188:23: sparse: incompatible types in comparison expression (different address spaces)
   include/linux/slab.h:664:13: sparse: undefined identifier '__builtin_mul_overflow'
>> net//openvswitch/conntrack.c:1854:46: sparse: call with no type!
   include/linux/slab.h:664:13: sparse: call with no type!

vim +1154 net//openvswitch/conntrack.c

  1143	
  1144	static void ovs_ct_add_timeout(struct net *net, struct nf_conn *ct,
  1145				       const char *timeout_name, u16 l3num, u8 l4num)
  1146	{
  1147	#ifdef CONFIG_NF_CONNTRACK_TIMEOUT
  1148		typeof(nf_ct_timeout_find_get_hook) timeout_find_get;
  1149		typeof(nf_ct_timeout_put_hook) timeout_put;
  1150		struct nf_ct_timeout *timeout;
  1151		struct nf_conn_timeout *timeout_ext;
  1152	
  1153		rcu_read_lock();
> 1154		timeout_find_get = rcu_dereference(nf_ct_timeout_find_get_hook);
  1155		if (!timeout_find_get) {
  1156			net_info_ratelimited("Timeout policy base is empty");
  1157			goto out;
  1158		}
  1159	
  1160		timeout = timeout_find_get(net, timeout_name);
  1161		if (!timeout) {
  1162			net_info_ratelimited("No such timeout policy \"%s\"\n",
  1163					     timeout_name);
  1164			goto out;
  1165		}
  1166	
  1167		if (timeout->l3num != l3num) {
  1168			net_info_ratelimited("Timeout policy `%s' can only be used by "
  1169					     "L3 protocol number %d\n", timeout_name,
  1170					     timeout->l3num);
  1171			goto err_put_timeout;
  1172		}
  1173	
  1174		if (timeout->l4proto->l4proto != l4num) {
  1175			net_info_ratelimited("Timeout policy `%s' can only be used by "
  1176					     "L4 protocol number %d\n", timeout_name,
  1177					     timeout->l4proto->l4proto);
  1178			goto err_put_timeout;
  1179		}
  1180	
  1181		timeout_ext = nf_ct_timeout_ext_add(ct, timeout, GFP_ATOMIC);
  1182		if (!timeout_ext)
  1183			goto err_put_timeout;
  1184	
  1185		goto out;
  1186	
  1187	err_put_timeout:
  1188		timeout_put = rcu_dereference(nf_ct_timeout_put_hook);
  1189		if (timeout_put)
  1190			timeout_put(timeout);
  1191	out:
  1192		rcu_read_unlock();
  1193		return;
  1194	#endif
  1195	}
  1196	

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