Re: [PATCH net-next 06/18] net: move ip_packet_offload and ipv6_packet_offload to net_hotdata

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

Hi Eric,

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/Eric-Dumazet/net-introduce-struct-net_hotdata/20240306-001407
base:   net-next/main
patch link:    https://lore.kernel.org/r/20240305160413.2231423-7-edumazet%40google.com
patch subject: [PATCH net-next 06/18] net: move ip_packet_offload and ipv6_packet_offload to net_hotdata
config: hexagon-defconfig (https://download.01.org/0day-ci/archive/20240306/202403061318.QMW92UEi-lkp@intel.com/config)
compiler: clang version 19.0.0git (https://github.com/llvm/llvm-project 325f51237252e6dab8e4e1ea1fa7acbb4faee1cd)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240306/202403061318.QMW92UEi-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/202403061318.QMW92UEi-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from include/linux/highmem.h:12:
   In file included from include/linux/hardirq.h:11:
   In file included from ./arch/hexagon/include/generated/asm/hardirq.h:1:
   In file included from include/asm-generic/hardirq.h:17:
   In file included from include/linux/irq.h:20:
   In file included from include/linux/io.h:13:
   In file included from arch/hexagon/include/asm/io.h:328:
   include/asm-generic/io.h:573:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     573 |         val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
         |                                                         ~~~~~~~~~~ ^
   include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
      35 | #define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
         |                                                   ^
   In file included from net/ipv6/ip6_offload.c:9:
   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:12:
   In file included from include/linux/hardirq.h:11:
   In file included from ./arch/hexagon/include/generated/asm/hardirq.h:1:
   In file included from include/asm-generic/hardirq.h:17:
   In file included from include/linux/irq.h:20:
   In file included from include/linux/io.h:13:
   In file included from arch/hexagon/include/asm/io.h:328:
   include/asm-generic/io.h:584:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     584 |         __raw_writeb(value, PCI_IOBASE + addr);
         |                             ~~~~~~~~~~ ^
   include/asm-generic/io.h:594:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     594 |         __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
         |                                                       ~~~~~~~~~~ ^
   include/asm-generic/io.h:604:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     604 |         __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
         |                                                       ~~~~~~~~~~ ^
   In file included from net/ipv6/ip6_offload.c:9:
   In file included from include/linux/netdevice.h:45:
   In file included from include/uapi/linux/neighbour.h:6:
   In file included from include/linux/netlink.h:9:
   In file included from include/net/scm.h:9:
   In file included from include/linux/security.h:35:
   include/linux/bpf.h:736:48: warning: bitwise operation between different enumeration types ('enum bpf_type_flag' and 'enum bpf_arg_type') [-Wenum-enum-conversion]
     736 |         ARG_PTR_TO_MAP_VALUE_OR_NULL    = PTR_MAYBE_NULL | ARG_PTR_TO_MAP_VALUE,
         |                                           ~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~~~~~~
   include/linux/bpf.h:737:43: warning: bitwise operation between different enumeration types ('enum bpf_type_flag' and 'enum bpf_arg_type') [-Wenum-enum-conversion]
     737 |         ARG_PTR_TO_MEM_OR_NULL          = PTR_MAYBE_NULL | ARG_PTR_TO_MEM,
         |                                           ~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~
   include/linux/bpf.h:738:43: warning: bitwise operation between different enumeration types ('enum bpf_type_flag' and 'enum bpf_arg_type') [-Wenum-enum-conversion]
     738 |         ARG_PTR_TO_CTX_OR_NULL          = PTR_MAYBE_NULL | ARG_PTR_TO_CTX,
         |                                           ~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~
   include/linux/bpf.h:739:45: warning: bitwise operation between different enumeration types ('enum bpf_type_flag' and 'enum bpf_arg_type') [-Wenum-enum-conversion]
     739 |         ARG_PTR_TO_SOCKET_OR_NULL       = PTR_MAYBE_NULL | ARG_PTR_TO_SOCKET,
         |                                           ~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~~~
   include/linux/bpf.h:740:44: warning: bitwise operation between different enumeration types ('enum bpf_type_flag' and 'enum bpf_arg_type') [-Wenum-enum-conversion]
     740 |         ARG_PTR_TO_STACK_OR_NULL        = PTR_MAYBE_NULL | ARG_PTR_TO_STACK,
         |                                           ~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~~
   include/linux/bpf.h:741:45: warning: bitwise operation between different enumeration types ('enum bpf_type_flag' and 'enum bpf_arg_type') [-Wenum-enum-conversion]
     741 |         ARG_PTR_TO_BTF_ID_OR_NULL       = PTR_MAYBE_NULL | ARG_PTR_TO_BTF_ID,
         |                                           ~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~~~
   include/linux/bpf.h:745:38: warning: bitwise operation between different enumeration types ('enum bpf_type_flag' and 'enum bpf_arg_type') [-Wenum-enum-conversion]
     745 |         ARG_PTR_TO_UNINIT_MEM           = MEM_UNINIT | ARG_PTR_TO_MEM,
         |                                           ~~~~~~~~~~ ^ ~~~~~~~~~~~~~~
   include/linux/bpf.h:747:45: warning: bitwise operation between different enumeration types ('enum bpf_type_flag' and 'enum bpf_arg_type') [-Wenum-enum-conversion]
     747 |         ARG_PTR_TO_FIXED_SIZE_MEM       = MEM_FIXED_SIZE | ARG_PTR_TO_MEM,
         |                                           ~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~
   include/linux/bpf.h:770:48: warning: bitwise operation between different enumeration types ('enum bpf_type_flag' and 'enum bpf_return_type') [-Wenum-enum-conversion]
     770 |         RET_PTR_TO_MAP_VALUE_OR_NULL    = PTR_MAYBE_NULL | RET_PTR_TO_MAP_VALUE,
         |                                           ~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~~~~~~
   include/linux/bpf.h:771:45: warning: bitwise operation between different enumeration types ('enum bpf_type_flag' and 'enum bpf_return_type') [-Wenum-enum-conversion]
     771 |         RET_PTR_TO_SOCKET_OR_NULL       = PTR_MAYBE_NULL | RET_PTR_TO_SOCKET,
         |                                           ~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~~~
   include/linux/bpf.h:772:47: warning: bitwise operation between different enumeration types ('enum bpf_type_flag' and 'enum bpf_return_type') [-Wenum-enum-conversion]
     772 |         RET_PTR_TO_TCP_SOCK_OR_NULL     = PTR_MAYBE_NULL | RET_PTR_TO_TCP_SOCK,
         |                                           ~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~~~~~
   include/linux/bpf.h:773:50: warning: bitwise operation between different enumeration types ('enum bpf_type_flag' and 'enum bpf_return_type') [-Wenum-enum-conversion]
     773 |         RET_PTR_TO_SOCK_COMMON_OR_NULL  = PTR_MAYBE_NULL | RET_PTR_TO_SOCK_COMMON,
         |                                           ~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~~~~~~~~
   include/linux/bpf.h:775:49: warning: bitwise operation between different enumeration types ('enum bpf_type_flag' and 'enum bpf_return_type') [-Wenum-enum-conversion]
     775 |         RET_PTR_TO_DYNPTR_MEM_OR_NULL   = PTR_MAYBE_NULL | RET_PTR_TO_MEM,
         |                                           ~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~
   include/linux/bpf.h:776:45: warning: bitwise operation between different enumeration types ('enum bpf_type_flag' and 'enum bpf_return_type') [-Wenum-enum-conversion]
     776 |         RET_PTR_TO_BTF_ID_OR_NULL       = PTR_MAYBE_NULL | RET_PTR_TO_BTF_ID,
         |                                           ~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~~~
   include/linux/bpf.h:777:43: warning: bitwise operation between different enumeration types ('enum bpf_type_flag' and 'enum bpf_return_type') [-Wenum-enum-conversion]
     777 |         RET_PTR_TO_BTF_ID_TRUSTED       = PTR_TRUSTED    | RET_PTR_TO_BTF_ID,
         |                                           ~~~~~~~~~~~    ^ ~~~~~~~~~~~~~~~~~
   include/linux/bpf.h:888:44: warning: bitwise operation between different enumeration types ('enum bpf_type_flag' and 'enum bpf_reg_type') [-Wenum-enum-conversion]
     888 |         PTR_TO_MAP_VALUE_OR_NULL        = PTR_MAYBE_NULL | PTR_TO_MAP_VALUE,
         |                                           ~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~~
   include/linux/bpf.h:889:42: warning: bitwise operation between different enumeration types ('enum bpf_type_flag' and 'enum bpf_reg_type') [-Wenum-enum-conversion]
     889 |         PTR_TO_SOCKET_OR_NULL           = PTR_MAYBE_NULL | PTR_TO_SOCKET,
         |                                           ~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~
   include/linux/bpf.h:890:46: warning: bitwise operation between different enumeration types ('enum bpf_type_flag' and 'enum bpf_reg_type') [-Wenum-enum-conversion]
     890 |         PTR_TO_SOCK_COMMON_OR_NULL      = PTR_MAYBE_NULL | PTR_TO_SOCK_COMMON,
         |                                           ~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~~~~
   include/linux/bpf.h:891:44: warning: bitwise operation between different enumeration types ('enum bpf_type_flag' and 'enum bpf_reg_type') [-Wenum-enum-conversion]
     891 |         PTR_TO_TCP_SOCK_OR_NULL         = PTR_MAYBE_NULL | PTR_TO_TCP_SOCK,
         |                                           ~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~
   include/linux/bpf.h:892:42: warning: bitwise operation between different enumeration types ('enum bpf_type_flag' and 'enum bpf_reg_type') [-Wenum-enum-conversion]
     892 |         PTR_TO_BTF_ID_OR_NULL           = PTR_MAYBE_NULL | PTR_TO_BTF_ID,
         |                                           ~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~
>> net/ipv6/ip6_offload.c:481:14: error: no member named 'ipv6_packet_offload' in 'struct net_hotdata'; did you mean 'ip_packet_offload'?
     481 |         net_hotdata.ipv6_packet_offload = (struct packet_offload) {
         |                     ^~~~~~~~~~~~~~~~~~~
         |                     ip_packet_offload
   include/net/hotdata.h:11:24: note: 'ip_packet_offload' declared here
      11 |         struct packet_offload   ip_packet_offload;
         |                                 ^
   net/ipv6/ip6_offload.c:489:31: error: no member named 'ipv6_packet_offload' in 'struct net_hotdata'; did you mean 'ip_packet_offload'?
     489 |         dev_add_offload(&net_hotdata.ipv6_packet_offload);
         |                                      ^~~~~~~~~~~~~~~~~~~
         |                                      ip_packet_offload
   include/net/hotdata.h:11:24: note: 'ip_packet_offload' declared here
      11 |         struct packet_offload   ip_packet_offload;
         |                                 ^
   27 warnings and 2 errors generated.


vim +481 net/ipv6/ip6_offload.c

   475	
   476		if (tcpv6_offload_init() < 0)
   477			pr_crit("%s: Cannot add TCP protocol offload\n", __func__);
   478		if (ipv6_exthdrs_offload_init() < 0)
   479			pr_crit("%s: Cannot add EXTHDRS protocol offload\n", __func__);
   480	
 > 481		net_hotdata.ipv6_packet_offload = (struct packet_offload) {
   482			.type = cpu_to_be16(ETH_P_IPV6),
   483			.callbacks = {
   484				.gso_segment = ipv6_gso_segment,
   485				.gro_receive = ipv6_gro_receive,
   486				.gro_complete = ipv6_gro_complete,
   487			},
   488		};
   489		dev_add_offload(&net_hotdata.ipv6_packet_offload);
   490	
   491		inet_add_offload(&sit_offload, IPPROTO_IPV6);
   492		inet6_add_offload(&ip6ip6_offload, IPPROTO_IPV6);
   493		inet6_add_offload(&ip4ip6_offload, IPPROTO_IPIP);
   494	
   495		return 0;
   496	}
   497	

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