net/netfilter/nf_flow_table_offload.c:1080:60: error: incompatible type for argument 1 of 'dev_net'

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

tree:   https://github.com/intel-lab-lkp/linux/commits/Daniel-Golle/net-flow_offload-let-drivers-report-byte-counter-semantics/20260416-222603
head:   dcabaf6b4b67a90cc0e0a91709c382a82c29f182
commit: 73b3a08b530034da560fff6b3270293990e1110d nf_flow_table: convert hw byte counts and update sub-interface stats
date:   2 weeks ago
config: x86_64-rhel-9.4 (https://download.01.org/0day-ci/archive/20260430/202604301130.yR12CSul-lkp@intel.com/config)
compiler: gcc-14 (Debian 14.2.0-19) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260430/202604301130.yR12CSul-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/202604301130.yR12CSul-lkp@intel.com/

All errors (new ones prefixed by >>):

   net/netfilter/nf_flow_table_offload.c: In function 'flow_offload_update_encap_stats':
>> net/netfilter/nf_flow_table_offload.c:1080:60: error: incompatible type for argument 1 of 'dev_net'
    1080 |                 dev = dev_get_by_index_rcu(dev_net(flow->ct->ct_net),
         |                                                    ~~~~~~~~^~~~~~~~
         |                                                            |
         |                                                            possible_net_t
   In file included from include/linux/netfilter.h:16,
                    from net/netfilter/nf_flow_table_offload.c:5:
   include/linux/netdevice.h:2745:46: note: expected 'const struct net_device *' but argument is of type 'possible_net_t'
    2745 | struct net *dev_net(const struct net_device *dev)
         |                     ~~~~~~~~~~~~~~~~~~~~~~~~~^~~
   net/netfilter/nf_flow_table_offload.c:1095:60: error: incompatible type for argument 1 of 'dev_net'
    1095 |                 dev = dev_get_by_index_rcu(dev_net(flow->ct->ct_net),
         |                                                    ~~~~~~~~^~~~~~~~
         |                                                            |
         |                                                            possible_net_t
   include/linux/netdevice.h:2745:46: note: expected 'const struct net_device *' but argument is of type 'possible_net_t'
    2745 | struct net *dev_net(const struct net_device *dev)
         |                     ~~~~~~~~~~~~~~~~~~~~~~~~~^~~


vim +/dev_net +1080 net/netfilter/nf_flow_table_offload.c

  1058	
  1059	/* Update sub-interface (VLAN, PPPoE) stats for hw-offloaded flows.
  1060	 *
  1061	 * The driver reports L3 (IP) bytes. Each sub-interface in the
  1062	 * software path sees the frame with the headers of all layers
  1063	 * BELOW it still present, so we add back inner-layer overhead.
  1064	 *
  1065	 * encap[] is ordered outermost to innermost, so walk from the
  1066	 * innermost layer outward, accumulating overhead as we go.
  1067	 */
  1068	static void flow_offload_update_encap_stats(struct flow_offload *flow,
  1069						    struct flow_offload_tuple *tuple,
  1070						    bool rx, u64 pkts, u64 bytes)
  1071	{
  1072		struct net_device *dev;
  1073		int inner_hlen = 0;
  1074		int i;
  1075	
  1076		for (i = tuple->encap_num - 1; i >= 0; i--) {
  1077			if (tuple->in_vlan_ingress & BIT(i))
  1078				continue;
  1079	
> 1080			dev = dev_get_by_index_rcu(dev_net(flow->ct->ct_net),
  1081						   tuple->encap_ifidx[i]);
  1082			if (dev)
  1083				flow_offload_encap_netstats(dev,
  1084							    tuple->encap[i].proto, rx,
  1085							    pkts,
  1086							    bytes + inner_hlen * pkts);
  1087	
  1088			inner_hlen += flow_offload_encap_hlen(tuple, i);
  1089		}
  1090	
  1091		/* Bridge device sits outside all encap layers -- it sees
  1092		 * L3 bytes plus the full encap overhead.
  1093		 */
  1094		if (tuple->bridge_ifidx) {
  1095			dev = dev_get_by_index_rcu(dev_net(flow->ct->ct_net),
  1096						   tuple->bridge_ifidx);
  1097			if (dev && dev->tstats)
  1098				flow_offload_encap_netstats(dev, 0, rx, pkts,
  1099							    bytes + inner_hlen * pkts);
  1100		}
  1101	}
  1102	

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