Re: [PATCH net-next 2/2] net/smc: support ipv4 mapped ipv6 addr client for smc-r v2

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

Hi Guangguan,

kernel test robot noticed the following build errors:

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

url:    https://github.com/intel-lab-lkp/linux/commits/Guangguan-Wang/net-smc-support-SMC-R-V2-for-rdma-devices-with-max_recv_sge-equals-to-1/20241128-111259
base:   net-next/main
patch link:    https://lore.kernel.org/r/20241127094533.18459-3-guangguan.wang%40linux.alibaba.com
patch subject: [PATCH net-next 2/2] net/smc: support ipv4 mapped ipv6 addr client for smc-r v2
config: arm-randconfig-001-20241128 (https://download.01.org/0day-ci/archive/20241128/202411282154.DjX7ilwF-lkp@intel.com/config)
compiler: clang version 20.0.0git (https://github.com/llvm/llvm-project 592c0fe55f6d9a811028b5f3507be91458ab2713)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241128/202411282154.DjX7ilwF-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/202411282154.DjX7ilwF-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from net/smc/af_smc.c:27:
   In file included from include/linux/if_vlan.h:10:
   In file included from include/linux/netdevice.h:38:
   In file included from include/net/net_namespace.h:43:
   In file included from include/linux/skbuff.h:17:
   In file included from include/linux/bvec.h:10:
   In file included from include/linux/highmem.h:8:
   In file included from include/linux/cacheflush.h:5:
   In file included from arch/arm/include/asm/cacheflush.h:10:
   In file included from include/linux/mm.h:2225:
   include/linux/vmstat.h:518:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
     518 |         return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_"
         |                               ~~~~~~~~~~~ ^ ~~~
>> net/smc/af_smc.c:1120:46: error: no member named 'skc_v6_rcv_saddr' in 'struct sock_common'; did you mean 'skc_rcv_saddr'?
    1120 |              !ipv6_addr_v4mapped(&smc->clcsock->sk->sk_v6_rcv_saddr)) ||
         |                                                     ^
   include/net/sock.h:376:37: note: expanded from macro 'sk_v6_rcv_saddr'
     376 | #define sk_v6_rcv_saddr __sk_common.skc_v6_rcv_saddr
         |                                     ^
   include/net/sock.h:155:11: note: 'skc_rcv_saddr' declared here
     155 |                         __be32  skc_rcv_saddr;
         |                                 ^
   1 warning and 1 error generated.


vim +1120 net/smc/af_smc.c

  1087	
  1088	static int smc_find_proposal_devices(struct smc_sock *smc,
  1089					     struct smc_init_info *ini)
  1090	{
  1091		int rc = 0;
  1092	
  1093		/* check if there is an ism device available */
  1094		if (!(ini->smcd_version & SMC_V1) ||
  1095		    smc_find_ism_device(smc, ini) ||
  1096		    smc_connect_ism_vlan_setup(smc, ini))
  1097			ini->smcd_version &= ~SMC_V1;
  1098		/* else ISM V1 is supported for this connection */
  1099	
  1100		/* check if there is an rdma device available */
  1101		if (!(ini->smcr_version & SMC_V1) ||
  1102		    smc_find_rdma_device(smc, ini))
  1103			ini->smcr_version &= ~SMC_V1;
  1104		/* else RDMA is supported for this connection */
  1105	
  1106		ini->smc_type_v1 = smc_indicated_type(ini->smcd_version & SMC_V1,
  1107						      ini->smcr_version & SMC_V1);
  1108	
  1109		/* check if there is an ism v2 device available */
  1110		if (!(ini->smcd_version & SMC_V2) ||
  1111		    !smc_ism_is_v2_capable() ||
  1112		    smc_find_ism_v2_device_clnt(smc, ini))
  1113			ini->smcd_version &= ~SMC_V2;
  1114	
  1115		/* check if there is an rdma v2 device available */
  1116		ini->check_smcrv2 = true;
  1117		ini->smcrv2.saddr = smc->clcsock->sk->sk_rcv_saddr;
  1118		if (!(ini->smcr_version & SMC_V2) ||
  1119		    (smc->clcsock->sk->sk_family != AF_INET &&
> 1120		     !ipv6_addr_v4mapped(&smc->clcsock->sk->sk_v6_rcv_saddr)) ||
  1121		    !smc_clc_ueid_count() ||
  1122		    smc_find_rdma_device(smc, ini))
  1123			ini->smcr_version &= ~SMC_V2;
  1124		ini->check_smcrv2 = false;
  1125	
  1126		ini->smc_type_v2 = smc_indicated_type(ini->smcd_version & SMC_V2,
  1127						      ini->smcr_version & SMC_V2);
  1128	
  1129		/* if neither ISM nor RDMA are supported, fallback */
  1130		if (ini->smc_type_v1 == SMC_TYPE_N && ini->smc_type_v2 == SMC_TYPE_N)
  1131			rc = SMC_CLC_DECL_NOSMCDEV;
  1132	
  1133		return rc;
  1134	}
  1135	

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