[PATCH v4 bpf-next 06/12] bpf: take into account BPF token when fetching helper protos

[kernel test robot]

Hi Andrii,

kernel test robot noticed the following build errors:

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

url:    https://github.com/intel-lab-lkp/linux/commits/Andrii-Nakryiko/bpf-add-BPF-token-delegation-mount-options-to-BPF-FS/20230913-053240
base:   https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master
patch link:    https://lore.kernel.org/r/20230912212906.3975866-7-andrii%40kernel.org
patch subject: [PATCH v4 bpf-next 06/12] bpf: take into account BPF token when fetching helper protos
config: i386-randconfig-r015-20230913 (https://download.01.org/0day-ci/archive/20230914/202309140202.lwVDn4bK-lkp@intel.com/config)
compiler: clang version 16.0.4 (https://github.com/llvm/llvm-project.git ae42196bc493ffe877a7e3dff8be32035dea4d07)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20230914/202309140202.lwVDn4bK-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 at intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202309140202.lwVDn4bK-lkp@intel.com/

All errors (new ones prefixed by >>):

>> net/core/filter.c:11721:7: error: call to undeclared function 'bpf_token_capable'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
           if (!bpf_token_capable(prog->aux->token, CAP_PERFMON))
                ^
   1 error generated.


vim +/bpf_token_capable +11721 net/core/filter.c

 11687	
 11688	static const struct bpf_func_proto *
 11689	bpf_sk_base_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog)
 11690	{
 11691		const struct bpf_func_proto *func;
 11692	
 11693		switch (func_id) {
 11694		case BPF_FUNC_skc_to_tcp6_sock:
 11695			func = &bpf_skc_to_tcp6_sock_proto;
 11696			break;
 11697		case BPF_FUNC_skc_to_tcp_sock:
 11698			func = &bpf_skc_to_tcp_sock_proto;
 11699			break;
 11700		case BPF_FUNC_skc_to_tcp_timewait_sock:
 11701			func = &bpf_skc_to_tcp_timewait_sock_proto;
 11702			break;
 11703		case BPF_FUNC_skc_to_tcp_request_sock:
 11704			func = &bpf_skc_to_tcp_request_sock_proto;
 11705			break;
 11706		case BPF_FUNC_skc_to_udp6_sock:
 11707			func = &bpf_skc_to_udp6_sock_proto;
 11708			break;
 11709		case BPF_FUNC_skc_to_unix_sock:
 11710			func = &bpf_skc_to_unix_sock_proto;
 11711			break;
 11712		case BPF_FUNC_skc_to_mptcp_sock:
 11713			func = &bpf_skc_to_mptcp_sock_proto;
 11714			break;
 11715		case BPF_FUNC_ktime_get_coarse_ns:
 11716			return &bpf_ktime_get_coarse_ns_proto;
 11717		default:
 11718			return bpf_base_func_proto(func_id, prog);
 11719		}
 11720	
 11721		if (!bpf_token_capable(prog->aux->token, CAP_PERFMON))
 11722			return NULL;
 11723	
 11724		return func;
 11725	}
 11726	

-- 
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https://github.com/intel/lkp-tests/wiki