Re: [PATCH bpf-next v4 4/5] bpf: Add support for writing to nf_conn:mark

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Hi Daniel,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on bpf-next/master]

url:    https://github.com/intel-lab-lkp/linux/commits/Daniel-Xu/bpf-Remove-duplicate-PTR_TO_BTF_ID-RO-check/20220823-032643
base:   https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master
config: x86_64-rhel-8.3-kselftests (https://download.01.org/0day-ci/archive/20220902/202209022000.s58TmR9h-lkp@xxxxxxxxx/config)
compiler: gcc-11 (Debian 11.3.0-5) 11.3.0
reproduce (this is a W=1 build):
        # https://github.com/intel-lab-lkp/linux/commit/496ec6d75c8e8758f93c6b987eee83713c911a05
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Daniel-Xu/bpf-Remove-duplicate-PTR_TO_BTF_ID-RO-check/20220823-032643
        git checkout 496ec6d75c8e8758f93c6b987eee83713c911a05
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@xxxxxxxxx>

All errors (new ones prefixed by >>):

   ld: net/core/filter.o: in function `tc_cls_act_btf_struct_access':
>> net/core/filter.c:8644: undefined reference to `nf_conntrack_btf_struct_access'
   ld: net/core/filter.o: in function `xdp_btf_struct_access':
   include/net/net_namespace.h:369: undefined reference to `nf_conntrack_btf_struct_access'
   pahole: .tmp_vmlinux.btf: No such file or directory
   .btf.vmlinux.bin.o: file not recognized: file format not recognized


vim +8644 net/core/filter.c

  8632	
  8633	static int tc_cls_act_btf_struct_access(struct bpf_verifier_log *log,
  8634						const struct btf *btf,
  8635						const struct btf_type *t, int off,
  8636						int size, enum bpf_access_type atype,
  8637						u32 *next_btf_id,
  8638						enum bpf_type_flag *flag)
  8639	{
  8640		if (atype == BPF_READ)
  8641			return btf_struct_access(log, btf, t, off, size, atype, next_btf_id,
  8642						 flag);
  8643	
> 8644		return nf_conntrack_btf_struct_access(log, btf, t, off, size, atype,
  8645						      next_btf_id, flag);
  8646	}
  8647	

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp



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