Re: [PATCH net-next 1/4] fib: remove suppress indirection

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

Hi Florian,

I love your patch! Perhaps something to improve:

[auto build test WARNING on net-next/master]

url:    https://github.com/0day-ci/linux/commits/Florian-Westphal/fib-remove-suppress-indirection-merge-nl-policies/20211213-233429
base:   https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git 97884b07122aabb2d6891ce17f54e0e8e94d0bc5
config: i386-randconfig-a015-20211213 (https://download.01.org/0day-ci/archive/20211214/202112140516.lS6zCrEh-lkp@intel.com/config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
        # https://github.com/0day-ci/linux/commit/585507534b121a41b45edaec79fe6c3d94a50b5f
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Florian-Westphal/fib-remove-suppress-indirection-merge-nl-policies/20211213-233429
        git checkout 585507534b121a41b45edaec79fe6c3d94a50b5f
        # save the config file to linux build tree
        mkdir build_dir
        make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash net/core/

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

   net/core/fib_rules.c: In function 'fib4_rule_suppress':
   net/core/fib_rules.c:300:31: error: implicit declaration of function 'fib_info_nhc'; did you mean 'fib_info_put'? [-Werror=implicit-function-declaration]
     300 |   struct fib_nh_common *nhc = fib_info_nhc(result->fi, 0);
         |                               ^~~~~~~~~~~~
         |                               fib_info_put
>> net/core/fib_rules.c:300:31: warning: initialization of 'struct fib_nh_common *' from 'int' makes pointer from integer without a cast [-Wint-conversion]
   net/core/fib_rules.c: In function 'fib6_rule_suppress':
   net/core/fib_rules.c:330:27: error: dereferencing pointer to incomplete type 'struct fib6_result'
     330 |  struct rt6_info *rt = res->rt6;
         |                           ^~
   net/core/fib_rules.c:336:8: error: dereferencing pointer to incomplete type 'struct rt6_info'
     336 |  if (rt->rt6i_idev)
         |        ^~
   net/core/fib_rules.c:354:2: error: implicit declaration of function 'ip6_rt_put_flags' [-Werror=implicit-function-declaration]
     354 |  ip6_rt_put_flags(rt, flags);
         |  ^~~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors


vim +300 net/core/fib_rules.c

   291	
   292	static bool fib4_rule_suppress(struct fib_rule *rule,
   293				       int flags,
   294				       struct fib_lookup_arg *arg)
   295	{
   296		struct fib_result *result = (struct fib_result *)arg->result;
   297		struct net_device *dev = NULL;
   298	
   299		if (result->fi) {
 > 300			struct fib_nh_common *nhc = fib_info_nhc(result->fi, 0);
   301	
   302			dev = nhc->nhc_dev;
   303		}
   304	
   305		/* do not accept result if the route does
   306		 * not meet the required prefix length
   307		 */
   308		if (result->prefixlen <= rule->suppress_prefixlen)
   309			goto suppress_route;
   310	
   311		/* do not accept result if the route uses a device
   312		 * belonging to a forbidden interface group
   313		 */
   314		if (rule->suppress_ifgroup != -1 && dev && dev->group == rule->suppress_ifgroup)
   315			goto suppress_route;
   316	
   317		return false;
   318	
   319	suppress_route:
   320		if (!(arg->flags & FIB_LOOKUP_NOREF))
   321			fib_info_put(result->fi);
   322		return true;
   323	}
   324	

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